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1
Talus, Zachary David. "Aerospace automated drilling and fastening technology product selection framework." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122598.
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Thesis: M.B.A., Massachusetts Institute of Technology, Sloan School of Management, 2019, In conjunction with the Leaders for Global Operations Program at MITThesis: S.M., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2019, In conjunction with the Leaders for Global Operations Program at MIT
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 65-67).
Ascent Aerospace is a global tooling and factory automation supplier for the Aerospace industry. Ascent's customers are typically introducing automation for the first time, or have already introduced automation to their production systems and are wary of its challenges. Choosing the appropriate technology is essential in ensuring successful implementation for both Ascent's customers and Ascent itself. Ascent has two different business units that produce equipment to automate the drilling and fastening of aerospace structures. These two units each come with vast product portfolios, and distinct approaches to address customer needs. This thesis focuses on an efficient method of evaluating how Ascent's current products align with customer's requirements, as well as identifying any technology gaps needing further exploration.
This thesis argues that Ascent's multiple business units are not currently equipped to advise their customers on investing in the appropriate technology for their production systems. To investigate such a vast solution space, a framework developed by the Systems Engineering Advancement Research Initiative (SEARI) at the Massachusetts Institute of Technology (MIT) is utilized called Multi-Attribute Tradespace Exploration (MATE). Using this framework, a software package called the Product Selection Tool, was developed to analyze how Ascent's product portfolio satisfies the customer's requirements for specific applications. The Product Selection Tool visualizes Ascent's 71 different product offerings on a single graph of utility versus cost per fastener.
The interface that displays the graph is dynamic, allowing Ascent's customers to adjust their requirements and preferences in real time, and visualize the sensitivity, or risk, of the recommended solution based on their specific requirements. This new approach allows Ascent to closely work with their customer in selecting a solution, identify areas of concern early on in the product selection process, and introduce cost-effective technology. This model can be applied to a variety of applications that have a vast solution space, reducing the complexity of understanding and communicating one's product line and/or capabilities.
by Zachary David Talus.
M.B.A.
S.M.
M.B.A. Massachusetts Institute of Technology, Sloan School of Management
S.M. Massachusetts Institute of Technology, Department of Aeronautics and Astronautics
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Kuo, Chun-Liang. "Drilling of Ti/CFRP/A1 multilayer stack materials." Thesis, University of Birmingham, 2014. http://etheses.bham.ac.uk//id/eprint/5460/.
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Multilayer metallic/composite stacks are increasingly being used in wing and tail plane sections of modern commercial aircraft, with component assembly primarily through mechanical joining, hence the requirement for fixation holes. Currently, the individual material sections (titanium, aluminium and CFRP) are machined independently prior to assembly however; there is growing demand within the industry to produce holes through the stack in a single operation. The research detailed in the thesis involves evaluating the effect of operating parameters, drill geometry, tool materials/coatings and cutting strategy when single shot drilling three-layer Ti/CFRP/Al stacks. Performance was assessed against various process measures including thrust forces/torque, hole accuracy/quality, tool wear/life, burr formation and hole surface integrity (microhardness and microstructure). Statistical design of experiments and associated analysis techniques (main effects plots, ANOVA etc.) were employed to identify the significance of variable factors and preferred operating levels with respect to different responses. Based on the experimental results, a bespoke drill design was formulated, which was validated against current commercially available drills recommended for the drilling of multilayer stacks. Finally, the influence of cutting fluid pressure on temperature and hole quality was investigated.
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Isaksson, Robert. "Drilling with force feedback." Thesis, Linköping University, Automatic Control, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-20897.
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Industrial robots have been used for a long time in the industry. Despite this thedevelopment of advanced force control system using industrial robots is relativelylimited. Using force controlled robot systems expands the possibility of what canbe done with industrial robots.Previously a force feedback system for a standard industrial robot from ABBhas been developed. The system is developed towards the aircraft industry, where amounted drill machine on the robot has to fulfill the requirements in robot drillingin aircraft structures. This thesis presents experimental results and improvementsof this industrial robot system. Mechanical modifications and tests of a new endeffector are analyzed.
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Elieff, Brandee Anastacia Marie. "Top hole drilling with dual gradient technology to control shallow hazards." Texas A&M University, 2006. http://hdl.handle.net/1969.1/4441.
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Currently the "Pump and Dump" method employed by Exploration and
Production (E&P) companies in deepwater is simply not enough to control increasingly
dangerous and unpredictable shallow hazards. "Pump and Dump" requires a heavy
dependence on accurate seismic data to avoid shallow gas zones; the kick detection
methods are slow and unreliable, which results in a need for visual kick detection; and it
does not offer dynamic well control methods of managing shallow hazards such as
methane hydrates, shallow gas and shallow water flows. These negative aspects of
"Pump and Dump" are in addition to the environmental impact, high drilling fluid (mud)
costs and limited mud options.
Dual gradient technology offers a closed system, which improves drilling simply
because the mud within the system is recycled. The amount of required mud is reduced,
the variety of acceptable mud types is increased and chemical additives to the mud
become an option. This closed system also offers more accurate and faster kick
detection methods in addition to those that are already used in the "Pump and Dump"
method. This closed system has the potential to prevent the formation of hydrates by
adding hydrate inhibitors to the drilling mud. And more significantly, this system successfully controls dissociating methane hydrates, over pressured shallow gas zones
and shallow water flows.
Dual gradient technology improves deepwater drilling operations by removing
fluid constraints and offering proactive well control over dissociating hydrates, shallow
water flows and over pressured shallow gas zones. There are several clear advantages for
dual gradient technology: economic, technical and significantly improved safety, which
is achieved through superior well control.
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Danert, Kerstin. "Technology transfer for development : insights from the introduction of low cost water well drilling technology to Uganda." Thesis, Cranfield University, 2003. http://dspace.lib.cranfield.ac.uk/handle/1826/4464.
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Third World development theory and practice are changing so rapidly that it is important to critically examine the fashions of today before they become history. This thesis considers the development, transfer, early adoption and sustainable use of technology, coupled with private sector participation in rural water supply provision. Improving water supplies for rural communities is one of the key challenges faced by development interventionists today. Lack of low cost, off the shelf technology for local enterprise which can provide affordable shallow wells for rural communities is one barrier to facilitating improvements. This thesis is based on research undertaken in Uganda to develop and transfer low cost water drilling technology in the context of decentralisation and privatisation policies. An extensive range of literature has been drawn together into 16 principles which guide technology transfer and development intervention. These principles are reexamined in the light of analysis of first hand experiences of undertaking a technology transfer project and interviews with stakeholders regarding their attitudes and perceptions. The research found that technology transfer is a cross-disciplinary and cross cultural process in which the linkages between the technology, context, individuals, organisations and beneficiaries need to be firmly established. Ugandan business and local Government culture plays a major role in facilitating successful technology uptake. Dealing with the risks associated with low cost groundwater technology is fundamental for its wider adoption. The process of technology transfer is important, particularly as high levels of stakeholder participation may compromise the delivery of outputs, at least in the short term. In terms of future challenges, this thesis shows that, culture, governance and equity need to be closely examined in relation to private sector participation in rural infrastructure provision. Private sector participation can conflict with community participation. How to adequately support innovation in Sub-Saharan Africa while harmonising development interventions is a challenge to the development community.
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Xie, Jing. "Models for filtration during drilling, completion and stimulation operations /." Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3008475.
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Ajibose, Olusegun K. "Nonlinear dynamics and contact fracture mechanics of high frequency percussive drilling." Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2009. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=61011.
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Montgomery, Justin B. (Justin Bruce). "Characterizing shale gas and tight oil drilling and production performance variability." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98600.
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Thesis: S.M. in Technology and Policy, Massachusetts Institute of Technology, Engineering Systems Division, Technology and Policy Program, 2015.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 137-147).
Shale gas and tight oil are energy resources of growing importance to the U.S. and the world. The combination of horizontal drilling and hydraulic fracturing has enabled economically feasible production from these resources, leading to a surge in domestic oil and gas production. This is providing an economic boon and reducing reliance on foreign sources of energy in the U.S., but there are still a number of environmental, economic, and technical challenges that must be overcome to unlock the resource's full potential. One key challenge is understanding variability in individual well performance-in terms of both drilling time (a key driver of well cost) and well productivity-which has led to greater than anticipated economic risk associated with shale gas and tight oil development. Thus far, more reliable forecasting has remained elusive due to its prohibitive cost and the poorly understood nature of the resource. There is an opportunity to make use of available drilling and production data to improve the characterization of variability. For my analysis, I use publicly-available well production data and drilling reports from a development campaign. In order to characterize variability, I use a combination of graphical, statistical, and data analytics methods. For well productivity, I use probability plots to demonstrate a universality to the distribution shape, which can accurately be described as lognormal. Building on this distributional assumption, I demonstrate the utility of Bayesian statistical inference for improving estimates of the distribution parameters, which will allow companies to better anticipate resource variability and make better decisions under this uncertainty. For drilling, I characterize variability in operations by using approximate string matching to compare drilling activity sequences, leading to a metric for operational variability. Activity sequences become more similar over time, consistent with the notion of standardization. Finally, I investigate variability of drilling times as they progress along the learning curve, using probability plots again. I find some indication of lognormality, with implications for how learning in drilling should be measured and predicted. This thesis emphasizes the relevance of data analytics to characterizing performance variability across the spectrum in shale gas and tight oil. The findings also demonstrate the value of such an approach for identifying patterns of behavior, estimating future variability, and guiding development strategies.
by Justin B. Montgomery.
S.M. in Technology and Policy
9
Zhu, Yaoxuan, and Xiaoting Huang. "IMPROVEMENT OF COMPACTED GRAPHITE IRON DRILLING OPERATIONS WITH CUSTOMIZED CUTTING FLUID." Thesis, KTH, Industriell produktion, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-226315.
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With its higher strength, Compacted Graphite Iron (CGI) is widely used in automotive industry. However, the machinability of CGI is challenging, mostly due to the high temperature in the cutting zone and the higher cutting force. This paper studies the influence of the different cutting fluids on the machinability of CGI material in drilling operations. The investigation compared a few customized cutting fluids having alkaline phase and oil phase, to a conventional cutting fluid. The oil phase of customized cutting fluid can help reduce the friction force in the machining process. The flank wear measurements showed there is no significant difference among the fluids. The thrust force measurements, however, showed that the customized cutting fluids could effectively reduce the cutting force by nearly 20%. By using the customized cutting fluid, the machining of CGI materials could either use higher feed rate to reduce cycle time when keeping the cutting force same, or use the same process data while reducing energy consumption.Inom bilindustrin används ofta kompaktgrafitjärn eftersom det har hög hållfasthet. Att bearbeta kompaktgrafitjärn är utmanade främst pga att det krävs hög temperatur och mycket kraft för att skära/borra materialet. I den här avhandlingen undersöks hur olika skärvätskor påverkar bearbetning av kompaktgrafitjärn under borrning. Skärvätskor där proportionerna mellan den alkaliska delen och oljedelen har anpassats, jämfördes mot traditionella emulsionsvätskor. Oljan i den kundanpassade skärvätskan kan hjälpa till att minska friktionskraften i bearbetningsoperationen. Fasförslitningsmätningen visade att det inte finns någon signifikant skillnad mellan skärvätskorna. Tryckraftsmätningarna visade emellertid att det kundanpassade skärvätskorna effektivt kunde reducera skärkraften med nästan 20%. Genom att använda de anpassade skärvätskorna kan man köra med högre mattningshastighet, reducera cykeltiden eller använda samma processparametrar men med mindre energianvändning.
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Teodoriu, Catalin [Verfasser]. "Contributions to drilling, completion and workover technology = Beiträge zur Bohr-, Komplettierungs- und Aufarbeitungstechnik / Catalin Teodoriu." Clausthal-Zellerfeld : Universitätsbibliothek Clausthal, 2012. http://d-nb.info/1023317222/34.
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Lindskoog, Pontus, and Jacob Westfeldt. "Drilling down into Business Intelligence : A study of implementation obstacles." Thesis, Uppsala universitet, Företagsekonomiska institutionen, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-314685.
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Even though the development of business intelligence is moving forward rapidly, a substantial number of organizations are yet to implement business intelligence. Therefore, this thesis aims at investigating what internal organizational obstacles that could be hindering the implementation of business intelligence and how these obstacles could be overcome. In order to answer this, the Technological Acceptance Model combined with the notion IT identity, is used as the theoretical framework. This thesis is of an interpretivist nature and data was collected through qualitative, semi-structured interviews with six experts within the field of business intelligence, consisting of consultants and business intelligence managers. The identified obstacles could be connected to employees’ perceived usefulness being too low in relation to the perceived non-pecuniary cost. The proposed solutions aims at raising the perceived usefulness and lower the non-pecuniary cost through different methods presented in this thesis.
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Tas, Baki Tugrul. "An Experimental Investigation Of The Shale Inhibition Properties Of A Quaternary Amine Compound." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615554/index.pdf.
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Depleting oil reserves and increased costs of the oil and gas recoveries have created the need to drill
in challenging formations. When drilled through, shale formations in particular always generated a
wide variety of problems if conventional water-based muds are used. Furthermore, the complexity and
variations in shales have compounded the task of developing suitable drilling fluids. In light of these
problems, the study of shale properties and their interactions with fluids will continue to be a muchneeded
source of information in drilling industry.
In this study a low molecular weight quaternary amine compound, which is provided by KarKim
Drilling Fluids Inc., and its mixtures with sodium and potassium chloride is investigated in the aspects
of capillary suction times, hot rolling recoveries, methylene blue capacities and one-dimensional free
swelling properties in order to compare performances of salts and amine compound.
For all test methods quaternary amine concentration from 1% to 6% by volume were studied and seen
that less amount of quaternary amine compound is needed in order to obtain close shale recoveries
and shale volume change potential if compared with sodium and potassium chloride. This prevents the
usage of high concentration of chlorides and hence provides environmental sensitiveness.
Furthermore, it was concluded that combining an amount of salt with quaternary amine compound
gives the system enhanced shale inhibition properties.
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Hallberg, Daniel, and Patrik Ringdahl. "Study on a high precision drilling tool with focus on power source and driveline." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-218001.
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Pettersen, Johan. "Overall Evaluation of Offshore Drilling Fluid Technology: Development and Application of Life- cycle Inventory and Impact Assessment Methods." Doctoral thesis, Norwegian University of Science and Technology, Department of Energy and Process Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-1828.
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The goal of this thesis is to provide the means for discussion of overall benefits of alternative offshore drilling technologies. Life-cycle assessment is used to assess environmental impact of alternative drilling technologies. Life-cycle assessment is well-suited for relative comparison and it offers the broad perspective necessary to evaluate overall performance.
Several methodological developments are made within the framework of life-cycle assessment to support the evaluation of offshore drilling fluid technology.
Offshore discharges to the marine environment during drilling operations are pulse emissions. The relative marine aquatic ecotoxic impact of pulse emissions compared to continuous emission processes is investigated by transient dispersion modeling.
Occupational health is an important decision objective for offshore operations. Crane-lifts are an important cause of accidents with human health damages on drilling rigs. A characterization factor for offshore crane-lifts is developed to include occupational health in life-cycle assessment.
Long-term release of metals from solid wastes is important for the ecotoxicity of drilling wastes. A review is presented that considers the current and possible solutions to address long-term leaching processes in life-cycle assessment.
An overall evaluation of offshore drilling fluid technology is performed. The study assesses the relative life-cycle performance of alternatives for density control in drilling fluids (ilmenite versus barite), offshore loading systems (crane-lifts versus a hydraulic system), base drilling fluids (water-base versus oil-base), and waste treatment of cuttings drilled with water-based drilling fluid (offshore discharge versus onshore treatment). A well located in the Barents Sea is used as reference.
Results are interpreted using Monte Carlo simulation. Preferred alternatives from an overall evaluation are proposed.
This thesis illustrates the challenges of life-cycle assessment. Most product systems require adaptation and development of methods for proper evaluation of impacts and results that meet requirements for decision objective attributes.
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Shahidi, Seyed-kazem. "The effects of narrow seeding points on soil structure, seed placement and crop growth in direct drilling systems." Title page, contents and abstract only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09phs5255.pdf.
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Bibliography: p. 182-197. The objectives of this study are: selection and construction of four narrow sowing points, evaluation of these points in terms of draught requirements and wear rates, comparison of the points in direct drilling systems and their effects on soil physical properties.
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Xiong, Shunhe. "Numerical model of a rock bit bearing seal." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/17240.
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Volec, Martin. "Malá vrtná souprava pro vrtání studní." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232188.
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The aim of this thesis is the structural design small drilling rigs for drilling wells. Drilling rig will be used for drilling wells up to 200 mm diameter rotary drilling technology with irrigation water. The first part is a literature search of small drilling rigs. In the second part, then custom design a small drilling rig.
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Rozum, Josef. "Racionalizace technologie vrtání." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231506.
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Master's thesis focus on the rationalisation of the holes drilling technology in the bearing rings which are defined for wind generators. This work contains review of drilling tools, analysis of the current state and proposal of rationalising precautions. Rationalising precautions are focused mainly on the adequate choice of the drilling technology and applied tools. The most suitable option was chosen for the drilling of holes according to the economical evaluation.
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Akrouh, Ettaghadouini Samy. "Metamodelling of a Finite Element Analysis of a Drilling Process with Replaceable Inserts." Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-16780.
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The aim of this project is to create a metamodel from a drilling tool with replaceable inserts from FEA of the machining process using MATLAB and ABAQUS. This report contains research in drilling and in metamodeling using neural networks and the work from the design of the CAD, through FEA and simulations, to the metamodeling, excluding the optimization. The work has resulted in a framework where a base FE model of the drill with two inserts that works, but due to time issues and given high cutting speed and feed the results of the FEA and the metamodeling are not very accurate. Therefore, the optimization analysis could not be done. However, it has been shown that feed has a major influence on the inserts temperature than the cutting speed, despite the higher range of this last one.
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Hed, Maria. "Underhåll av automatiserade borriggar." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-70186.
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I det moderna samhället utgör metaller en viktig del. Boliden Minerals AB är en stor aktör inom gruvindustrin och är verksamma i Sverige, Finland, Norge och på Irland. I en komplex bransch med varierande arbetsförhållanden och farliga miljöer för de som arbetar i gruvorna är säkerhet en grundpelare. Automation och underhåll är viktiga faktorer för en ökad säkerhet, produktivitet och driftsäkerhet. För att utvinna mineraler ur berg är borrning och sprängning en viktig del i processen. Gruvbrytning omfattar dagbrott och underjordsbrytning och i det här arbetet har borrningsprocessen vid underjordsbrytning studerats. Boliden har planer på att införa autonom borrning av ort- och fällsalvor, som en del i deras gruvautomationsprojekt. Som ett första steg för att öka produktionen och utnyttjandegraden för maskinerna vill de utföra autonom borrning under lunchuppehåll och skiftbyten. Syftet med arbetet var att möjliggöra autonom borrning genom att ur ett underhållsperspektiv förbättra driftsäkerheten för borriggarna. Målet var att kartlägga de fel som uppstår på borriggen samt att föreslå åtgärder för att minska driftstörningarna. Utifrån dokumentation och intervjuer har kartläggningar gjorts över vilka fel som uppstår på borriggarna, hur rutinerna ser ut för tillsyn och underhåll samt vilka larm borriggarnas styrsystem kan ge. Kartläggningen av fel som uppstår har först gjorts med övergripande kategorier för att sedan på detaljnivå studera de områden som står för de flesta felen. Insamlat data, intervjuer och egna observationer har legat till grund för att ta fram förslag till hur driftsäkerheten kan ökas för borriggarna. I linje med tidigare studier visade resultatet att de områden som står för de flesta felen är slangar, med ca 30 % av de totala felen, följt av matare, borrmaskin och styrsystem. I studien utgjorde dessa fel 80–90% av totalt antal fel. Det finns många orsaker till att felen uppstår. Det beror bland annat på miljön som maskinerna arbetar i, mänskligt handhavande, vibrationer och nötningar. Förutom de dokumenterade felen utför operatörerna olika drifts- och underhållsåtgärder på maskinerna. Det omfattar bland annat att fylla på olja och byta borrkrona när dessa blir nötta. Driftstörningarna utgör ca 6 % av den totala tiden då borrmaskinen står uppkopplad vid gaveln. Driftsäkerheten kan ökas ytterligare på de områden där de flesta felen uppstår genom att vidta olika åtgärder. Slangbrott kan minskas genom att skydda slangarna på utsatta ställen och ha ett tätare förebyggande underhåll. I övrigt handlar åtgärderna mycket om att underhåll ska utföras på rätt sätt, att rätt förutsättningar ska finnas för att utför underhållet och att möjliggöra övervakning av borriggen när det inte finns någon operatör på plats. För att i framtiden möjliggöra autonom borrning är det viktigt att operatörerna får rätt utbildning så att de kan systemet och förstår vinningen med att använda det. Vidare finns det många områden för fortsatt utveckling innan maskinerna kan borra helt autonomt och många av dessa områden utgör en stor utmaning på grund av dess komplexitet. Under hela resan är det också viktigt att fortsätta ha människan som utgångspunkt och ett högt säkerhetstänk.Metals are an important part of the modern society. Boliden Minerals AB is a major player in the mining industry and is active in Sweden, Finland, Norway and on Ireland. In a complex industry with varying working conditions and hazardous environments for those who work in the mines, safety is a cornerstone. Automation and maintenance are important factors for increased safety, productivity and reliability. In order to extract minerals from rock, drilling and blasting is an important part of the process. Mining includes surface and underground mining, and in this work the drilling process for underground mining has been studied. Boliden plans to introduce autonomous drilling for drifting, as part of their mining automation projects. As a first step in increasing the production and utilization of the machines, they want to perform autonomous drilling during lunch breaks and shift changes. The purpose of the work was to enable autonomous drilling by improving the reliability of drilling rigs from a maintenance perspective. The aim was to identify the faults on the drilling rig and propose measures to reduce the operational disturbances. Based on documentation and interviews, mapping has been made on the errors that occur on the drilling rigs, the procedures for supervision and maintenance, and which alarms the drilling rig’s control system can provide. The mapping of errors that occur was first made with overall categories, then studied at the level of detail for the areas that accounts for most of the errors. Based on collected data, interviews and observations, suggestions have been made for how the reliability can be increased on the drilling rigs. In line with previous studies, the result showed that the areas that account for most of the faults are hoses, with about 30 % of the failures, followed by feeder, rock drill and steering system. In the studie, these errors accounted for 80-90% of total errors. There are many reasons why the error occurs. Some of the biggest contribution factors are the environment in which the machines work, human handling, vibrations and wear and tear. In addition to the documented errors, operators perform various operating and maintenance measures on the machines. It includes filling oil and changing drill bits when they are worn out. The operating disturbances account for about 6% of the time when the drilling machine is in use. The reliability can be increased in areas where most of the errors arise by taking different actions. Hose breaks can be reduced by protecting the hoses in exposed areas and having a more throughout preventive maintenance. Other measures are to ensure proper maintenance, that the right conditions are provided and to enable monitoring of the drilling rig when there is no operator in place. In order to enable autonomous drilling in the future, it is important that operators get the right training so that they learn how to handle the system and understand the gain of using it. Furthermore, there are many areas for further development before the machines can drill completely autonomously and many of these areas represent a major challenge due to its complexity. Throughout this journey, it is also important to have a human-centered approach and a high level of security.
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Jarkovský, Marcel. "Řešení technologie součásti "ventil s kondenzační smyčkou"." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231353.
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This Master's thesis focuses on technology of production of the valve body produced by company Armaturka Vranová Lhota, a.s. First part introduces the company and their range of products. Second part of the Dissertation focuses on analysis of the part with details on construction, material and choice of three options of semi-finished product based on minimum expenses. In the third part are introduced current technological processes of assembling, weldment and valve body production. There are proposed two new production options to the current technological production process of body valve using different tools and jigs. New production instructions are calculated to establish times of production. In the conclusion of dissertation is the choice of optimal option considering habitual practice and conditions of company. For this chosen option is calculated technical-economic evaluation.
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Guan, Linhua. "Evaluation of a statistical infill candidate selection technique." Texas A&M University, 2003. http://hdl.handle.net/1969/207.
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Alajbegovic, Vahidin. "Design and development of a test apparatus for a downhole tool metal face mechanical seal." Diss., Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/19588.
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Röntzsch, Silke. "Bohrtechnische Erschließung submariner Gashydratlagerstätten." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2014. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-147223.
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Gashydratlagerstätten sind in Permafrostgebieten und unter dem Meeresboden zu finden. Das energetische Potential der weltweiten Gashydratvorkommen, vor allem im submarinen Bereich, ist enorm. Derzeit existiert aber noch keine Technologie mit der sie kommerziell erschlossen werden können.
Die größten Herausforderungen bei der bohrtechnischen Erschließung submariner Gashydratlagerstätten werden in der Richtbohrtechnik in geringverfestigten Sedimenten, der Bohrlochstabilität, der Einhaltung eines sehr engen Druckfensters sowie in der Vermeidung ungewollter Dissoziationsvorgänge während des Bohrprozesses gesehen. In der Arbeit werden mögliche Ansätze für die bohrtechnische Erschließung von submarinen Gashydratlagerstätten, speziell für das gerichtete Bohren in unkonsolidierten Formationen, zusammengetragen. Es werden verschiedene Erschließungskonzepte diskutiert und schließlich wird die Machbarkeit von zwei Bohrkonzepten untersucht.
Das erste Konzept zielt in erster Linie auf die Herstellung vertikaler Bohrungen zu Produktionstestzwecken in Gashydratlagerstätten ab. Auf Grundlage eines vorhandenen Meeresbodenbohrgerätes wird eine neuartige Technologie entwickelt, mit der eine Tiefsee-Gashydratbohrung abgeteuft, verrohrt und komplettiert werden kann, ohne dass eine Bohrplattform oder ein Bohrschiff eingesetzt werden muss.
Das zweite Konzept beinhaltet die Herstellung von horizontalen Produktionsbohrungen für eine kommerzielle Gashydratnutzung. Es wird untersucht, ob und unter welchen Bedingungen solche Bohrungen mit konventionellem Equipment machbar sind.
Es wird aufgezeigt, dass die Herausforderungen gemeistert werden können und die bohrtechnische Erschließung submariner Gashydratlagestätten mit beiden Konzepten grundsätzlich machbar erscheint.
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Tkáčová, Alena. "Sestavení technologie součásti "cage" ve firmě CCI Brno." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229897.
Full textAbstract:
This thesis is focused on techology of manufacturing a "cage" component at CCI Brno company. It solves drilling holes to the outside diameter of it. In the first part the company CCI is introduced, and in the second part is focused on component and material analysis. Next step is analyzing present manufacturing procedures and proposing its change. At the end of this thesis is techno-economic comparison of the present and proposed technological change.
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Chen, Sebastian, and Disa Fredriksson. "Utvärdering av löstoppsborrars prestanda : Som ett led i Scanias standardiseringsarbete ienlighet med SPS." Thesis, KTH, Industriell produktion, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-232576.
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Inom tillverkning är skärande bearbetning en vanligt förekommande process och däribland borrning.Verktygskostnader har stor påverkan på den totala tillverkningskostnaden då till exempel ett heltarbetsstycke i värsta fall kan gå förlorat vid verktygshaveri. Genom sitt arbete med ständigaförbättringar håller Scania sig konkurrenskraftiga med sina produkter av hög kvalitet. I dettaexamensarbete inom masterprogrammet Industriell Produktion på KTH har en specifik typ av borrmed löstagbar borrkrona utvärderats med avsikt att undersöka nya fabrikat.Uppdragsgivaren var motorbearbetningen (DM) på Scania i Södertälje. Arbetet inleddes med attinförskaffa relevant kunskap gällande verktyget som undersöktes. Samtidigt utfördes ennulägesanalys där de använda borrarna på DM kartlades tillsammans med information kring pris,livslängd, m.m. Utifrån kartläggingen sammanställdes statistik som analyserades för att identifierahur stor påverkan en eventuell standardisering skulle kunna ha.Utvärderingen av borrar bestod av praktiska experiment där sju olika verktyg med en diameter på12,2 mm testades under samma förhållanden. Testet utformades i enighet med berörda parter påDM samt efter studier av adekvat litteratur rörande borrexperiment. Fyra parametrar testadesutöver borrarnas livslängd. Dessa var axialkraft, förslitning, håldiameter och spånor. Parametrarnaämnades jämföras och analyseras för att dra slutsatser kring borrarnas prestationer.Nulägesanalysen visade att ett fabrikat utgjorde hela 69% av borrarna på hela DM. Efter slutfördaborrtester hade enbart tre av sju genomfört utan haveri, Borr E, F och G. Samtliga sju borrar visadegodkända spånor och höll sig inom toleranserna för angiven håldiameter. Axialkrafterna varierademellan borrarna där Borr F hade lägst krafter och Borr A högst. Borr E visade bäst motstånd motförslitningar. Utifrån detta valdes borrarna E, F och G att rekommenderas för deras goda prestationermed Borr E på första plats. Utöver det föreslogs att utbudet av fabrikat som kan användas på DMbegränsas för att uppnå kostnadsbesparingar gällande verktygen.Drilling is a common cutting process within manufacturing. Tool costs have great influence on thetotal manufacturing cost since a tool break down can cause an entire work piece to be scrapped.Through their constant work with improvements, Scania stays competitive with their high qualityproducts. This Master Thesis in Industrial Production and Management at KTH has evaluated aspecific type of drill with indexable heads with the purpose of investigating new brands.The Engine Manufacturing department (DM) at Scania in Södertälje requested this project. The taskwas initiated by obtaining knowledge about the tool that were to be investigated. Simultaneously ananalysis of the current state was performed where the drills at DM were mapped out withinformation regarding price, tool life, etc. The statistics were compiled and analysed to identify theeffect of an eventual standardisation.The evaluation consisted of practical experiments where seven different drills with a diameter of12,2 mm was tested under the same circumstances. The test was design in concurrence with affectedparts at DM and studies of adequate literature regarding drilling experiments. Four parameters weretested in addition to the tool life of the drills. These were axial force, tool wear, hole diameter andchips. The parameters were intended to be used for comparing and analysing in order to makeconclusions regarding the performance of the drills.The current state analysis showed that one brand represented 69% of the drills used at DM. Afterfinished drilling tests three out of seven drills managed to complete the test without tool breakdown. All drills produced chips that were acceptable and the measured diameters stayed within thegiven tolerances. The axial forces varied between the drill where Borr F had the lowest force and BorrA the highest. Borr E showed the best resistance against tool wear. From the results the drills thatwere recommended were Borr E, F and G because of their good performances with Borr E in the firstplace. Ultimately it was suggested to limit the amount of brands used at DM to achieve cost savingsregarding the tools.
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Rusník, Tomáš. "Technologie výroby součástky konzola." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229437.
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This thesis describes the complete technology solution of front driving axle console production by machining. The console is part of the self-supporting structure of the tractor and is produced under conditions of large engineering company. Introduction describes the prduction technology of component. The main part is devoted to the technological process of production and selection of appropriate cutting tools. Technical and economical evaluation of machined part is mentioned in the conclusion of thesis.
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Atolini, Tarcila Mantovan. "Estudo de comportamento PVT de misturas de metano em emulsões base N-parafina a altas temperaturas, pressões e concentrações de metano." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/265566.
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Orientador: Paulo Roberto RibeiroDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica, Instituto de Geociencias
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Resumo: Um dos avanços referentes ao desenvolvimento de tecnologias para perfuração de poços em condições severas de pressão e temperatura está ligado aos fluidos de perfuração. O entendimento do comportamento da mistura de fluido de perfuração e gás da formação, numa situação de influxo de gás da formação para o poço (kick), é essencial para as operações de controle de poço. Especialmente quando se utilizam fluidos orgânicos, os quais dificultam a detecção do influxo. O principal objetivo do presente trabalho é o estudo do comportamento termodinâmico desses fluidos a condições compatíveis com as de fundo de poços de alta temperatura e alta pressão (ATAP). Para atingir esta meta utilizou-se uma célula PVT com limite operacional de 200°C e 100MPa. Primeiramente estudou-se o sistema metano/nparafina nas composições de 0 a 95% em fração molar de metano e nas temperaturas de 70°C a 130°C. Numa segunda fase do trabalho foi estudado o sistema metano/emulsão com duas composições de emulsões, uma 60% n-parafina e outra 70%, variando-se também fração de gás e temperatura. Através dos dados experimentais do sistema metano/n-parafina realizou-se modelagem computacional para o cálculo da solubilidade, densidade e fator volume de formação, obtendo-se correlações que permitiram avaliar projeções baseadas na hipótese da aditividade. Para o cálculo direto dessas propriedades obtiveram-se correlações para o sistema metano/emulsões, as quais foram empregadas em cálculos de volume ganho no tanque como exemplo de sua aplicabilidade
Abstract: One of the advances in the development of drilling technologies under severe conditions of pressure and temperature is related to the drilling fluids. The understanding of the behavior of drilling fluid and the formation gas mixture, in a kick situation, is essential for the well control operations. Especially when organic fluids are used, which makes it more difficult to detect the influx of gas from the formation into the well. The main objective of this work was the study of the PVT behavior of these fluids at pressures and temperatures consistent with the HTHP well conditions. In order to accomplish that, a PVT cell with an operational limit of 200°C and 100MPa was used. First the system methane/n-paraffin was studied, with compositions from 0 to 95% in molar fraction of methane and at temperatures from 70 to 130°C. In a second phase of this work the system methane/emulsion was studied, for two different emulsions, one with 60% n-paraffin and another with 70%, also varying gas fraction and temperature. Through the experimental data of the methane/n-paraffin system a computational modeling was conducted to calculate solubility, density and formation volume factor, resulting in correlations that enabled the evaluation of the validity of the additivity hypothesis. For the entire experimental parameters spam, mathematical adjustments of the methane/emulsion system were done. This correlations were used in pit gain calculations as an example of its applicability
Mestrado
Explotação
Mestre em Ciências e Engenharia de Petróleo
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Parsian, Amir. "Dynamics of Torsional and Axial Vibrations in Indexable Drills." Licentiate thesis, Högskolan Väst, Avd för tillverkningsprocesser, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-8736.
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Drilling is widely used in manufacturing of products which need holes, for example for fluid channels, screws or pins. Depending on application, workpiece material, cutting parameters and economic considerations, different types of drills are employed. Indexable insert drills are types of drills which facilitate inserts to make holes. These types of drills can make high pitch noises due to vibrations. The focus of this thesis is to investigate the mechanism behind these vibrations in order to help reducing the generated noise in the future designs. Primary investigations show that the main mechanism which results the mentioned noise is regenerative chatter vibrations due to axial and torsional flexibilities. There is a gap in modeling of chatter vibrations in indexable drills where loadings and geometries are asymmetrical and due to torsional vibrations, delay terms are variable. The first step of simulating regenerative chatter vibrations in the drill is to model static cutting forces in a reliable way. In this thesis, a model is proposed which is capable of predicting static cutting forces through segmentation of cutting edges. Since, using this model, forces can be calculated separately on each insert, it is possible to consider differences of inserts in estimationof the cutting loads. The obtained loads are used in the chatter simulation.A model is proposed to simulate chatter vibrations by considering axialand angular deflections and the coupling between them. The resulted model isa system of delay differential equations with variable delays. Variations in timedelays, tool jump-outs and backward motions of inserts have been included inthe proposed time-domain simulation. A set of experiments is conducted toverify the model.
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Karamanov, Anton. "Utilization of Horizontal-Axis Tidal Stream Turbines As a Main Power Supply System On Offshore Remote Oil&Gas Platforms." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-263161.
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The master's thesis contains 97 pages, 29 tables, 33 figures and 43 sources of literature. The paper presents a study on increasing the efficiency of the power supply of remote offshore oil and gas facilities through the use of horizontal-axial tidal stream turbines. A general theoretical description of floating semi-submersible drilling rigs and a more detailed description of semi-submersible drilling unit 6000/200 type "Shelf" are presented. A theoretical description of various devices that transform the kinetic energy of water into electric power is also presented, and horizontal-axial tidal stream turbines are considered in more detail. The technical calculation for determining the parameters of turbines is carried out. The calculation was used for the case where one or several turbines are used. Economic analysis was carried out with different indicators, namely: the price of diesel fuel, the price of equipment, the load factor of hydro generators, the discount rate and the productivity of the drilling unit. An analysis of the reduction of carbon dioxide emissions was also carried out. Conclusions were presented on the effectiveness of the introduction of this method of energy supply.Magisteruppsatsen innehåller 97 sidor, 29 tabeller, 33 figurer och 43 litteraturkällor. I papperet presenteras en studie om att effektiviteten i kraftförsörjningen av avlägsna offshore olje- och gasanläggningar ökar genom användning av horisontella axiella tidvattenströmsturbiner. En generell teoretisk beskrivning av flytande halvdämpbara borriggar och en mer detaljerad beskrivning av semi-submersible borrningsenhet 6000/200 typ "Hylla" presenteras. En teoretisk beskrivning av olika anordningar som omvandlar den kinetiska energin hos vatten till elkraft presenteras också, och horisontella axiella tidvattenströmsturbiner behandlas mer detaljerat. Den tekniska beräkningen för att bestämma parametrarna för turbiner utförs. Beräkningen användes för det fall där en eller flera turbiner används. Ekonomisk analys utfördes med olika indikatorer, nämligen: priset på dieselbränsle, priset på utrustning, belastningsfaktorn för hydrageneratorer, diskonteringsräntan och borrningens produktivitet. En analys av minskningen av koldioxidutsläpp gjordes också. Slutsatser presenterades om effektiviteten av införandet av denna metod för energiförsörjning.
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Dvořák, Jakub. "Zdokonalení technologie výroby součásti typu příruba." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-402564.
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This diploma thesis focuses on improvement of the existing technology of the flange part in cooperation with the company Znojemské strojírny, s r.o. The theoretical part describes the technologies used in machining of the component. Subsequently, cutting materials and aluminum alloys are dealt with. A detailed analysis of the existing technology is performed in the practical part of the thesis followed by rationalization of the production process, which was carried out with respect to time and financial savings. A new technological procedure is developed after the improvement of the current production process. Finally, a technical-economic evaluation of the design improvement process is carried out.
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Kachyňa, Stanislav. "Návrh výrobní technologie součásti obráběcího stroje." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229221.
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This thesis deals with design for manufacturing technology single part on machine FS, which is the connecting part. Work deals with the material of this component, therefore, cast iron with lamellar graphite, the properties of this material, primarily focusing on the machinability. Due to the shape and dimensions of the workpiece is also described problems cutting of box parts, the most common operations used in their manufacture, including cutting tools and materials. These findings are then applied in terms of the company TOS Kuřim - OS a.s. An analysis of current manufacturing technology and design is made for its amendment. In conclusion with the technical-economic evaluation.
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Šiaulys, Tomas. "Inžinerinių tinklų įrengimas horizontalaus valdomo gręžimo metodu." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2009~D_20090603_095414-39883.
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Darbe analizuojama inžinerinių tinklų įrengimas horizontalaus valdomo gręžimo metodu. Pirmiausia pateikiama literatūros apžvalga, kurioje aptariami veiksniai, lemiantys žemės kasimo darbus. Aprašomas atviras žemės kasimo būdas, kuris dažniausiai naudojamas atliekant žemės kasimo darbus. Aptariamos betranšėjės technologijos, kurios naudojamos kaip alternatyva atviram žemės kasimo būdui specifinėse vietose. Tyrimo metodikoje ir organizavime dalyje pateikiami gręžimo darbų projektai bei jų analizės, gręžimo darbų pasirengimo etapai, gręžimo mašinų ir kitos įrangos, naudojamos tyrime, charakteristikos. Aptariami gręžimo mašinų parinkimo metodai konkrečiam gręžimui ir aprašomi gręžimo darbai. Tyrimų rezultatų analizės dalyje pateikiama gręžimo mašinų charakteristikų analizė bei pasirinktų trijų gręžimų ,,Kryptinio gręžimo matavimo protokolai“ bei pagal juos sudaryti išilginiai gręžimo profiliai. Pateikiamos tyrimo išvados ir rekomendacijos dėl inžinerinių tinklų įrengimo horizontalaus valdomo gręžimo metodu.The paper analyzes the engineering networks in horizontal directional drilling method. Firstly there is the literature review, which discusses the factors that determine the excavation. Describe the open method of excavating the land, which is mainly used in the excavation. Discussed in trenchless technology, which are used as an alternative way of moving to an open ground in specific areas. The study methodology and the organization of the work submitted for drilling projects, and their analysis, the preparation stages of drilling, drilling machines and other equipment used in the study, characteristics. Considered boring machine selection methods described in the particular drilling and boring work. Research results presented in the analysis of drilling machines and the analysis of selected characteristics of the three drilling, directional drilling measurement protocols, and to set them up under the longitudinal drilling profiles. Presented the study findings and recommendations of the engineering networks in horizontal directional drilling method.
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Nöbauer, Henrik. "Residual stresses and distortions in austenitic stainless steel 316L specimens manufactured by Selective Laser Melting." Thesis, Högskolan Väst, Avdelningen för svetsteknologi (SV), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-12771.
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Residual stresses are one of the major challenges in additive manufacturing of metallic materials today. They are induced during manufacturing because of the rapid local heating and cooling and may cause distortions, cracking and delamination between layers. The magnitude of the residual stresses depends on factors such as manufacturing technology, material, part geometry, scanning strategy, process parameters, preheating temperature and density of the component. In the present work, the magnitudes of residual stresses and distortions in austenitic stainless steel 316L components manufactured by Selective Laser melting have been investigated. Four specimens with rectangular cross-sections where produced with different heights and wall thicknesses. The residual stresses were measured by two different methods, x-ray diffraction and Electronic Speckle Pattern Interferometry (ESPI) incremental hole drilling in order to see how well they correspond to each other. The results showed peaks of high tensile stresses in the building direction in all specimens. The magnitudes of stresses were similar in all four specimens. The largest distortions occurred when the wall thickness was increased, and the height was reduced. It was also shown that the measurements made by x-ray diffraction and ESPI incremental hole drilling were not consistent with each other. The latter showed unrealistically high measurements near the surface.
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Paula, Junior Rubens Ribeiro de. "Modelagem de controle de poço com fluidos de perfuração não aquosos e estudos de casos." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263123.
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Orientador: Paulo Roberto RibeiroDissertação (mestrado) - Universidade Estadual de Campinas. Faculdade de Engenharia Mecanica e Instituto de Geociencias
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Resumo: O trabalho apresenta uma revisão da literatura sobre poços HPHT, abordando o desafio na construção dos mesmos, com ênfase no aspecto de segurança de poço. Do ponto de vista de desenvolvimento, o trabalho envolveu a implementação de um modelo de controle de poços com fluidos de perfuração não aquosos em software existente (Unikick), que incorpora correlações empíricas derivadas de resultados experimentais com n-parafina e diesel. A importância dessa implementação deve-se ao fato de que a previsão do comportamento das pressões, vazões e volumes desenvolvidos em um poço durante a detecção e circulação de um kick de gás, é muito útil para o engenheiro de perfuração que poderá tomar decisões sobre a maneira mais segura de lidar com estas situações. Alguns estudos de casos foram realizados através de comparação dos resultados obtidos pelo Unikick e outros simuladores disponíveis e análise de sensibilidade de parâmetros. Nessa análise, foram simuladas circulações de kicks em terra e marítimos em várias lâminas d'água, com trajetórias verticais e horizontais e observados os comportamentos de parâmetros importantes durante o controle do poço, como a pressão no choke, pit gain e vazão de gás na superfície.
Abstract: The first part of the work provides a review of the literature on HPHT wells, addressing the challenge in the construction of these wells, emphasizing the safety aspects. From the point of view of development, the work involved an implementation of a well control model for nonaqueous drilling fluids using existing software (Unikick), that incorporates empirical correlations derived from experimental results with n-paraffin and diesel. The importance of this implementation is due to the fact that the estimation of the behavior of pressures, flow rates and volumes developed inside a well during gas kick detection and circulation out of the well is very useful for the drilling engineer to take decisions about the safest way to handle these situations. Some case studies were performed through the comparison of simulated results from Unikick and other simulators available and a sensitivity analysis. In this analysis, some kick circulations were simulated in onshore and offshore wells with various water depths, vertical and horizontal trajectories, when important parameters of well control were observed, such as choke pressure pit gain and gas flow rate at surface.
Mestrado
Explotação
Mestre em Engenharia Mecânica
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Turčín, Jiří. "Návrh technologie výroby zvolené součásti a aplikace navržených změn do výrobního procesu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318860.
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This master thesis deals with a design of technological process description for a mechanical engineering part called „pressure plate“. The component is analyzed in regards to its mechanical engineering design and used material. Some brief theoretical prerequisites for an effective solution of the problem are summarized in the paper. A detailed research of current technological methods is provided, together with an analysis of the State-of-the-Art in manufacturing, introduction of technological possibilities of the company and a timeline records of the manufacturing process. In regards to the current methods and technologies, changes to the technological process are applied. Among these changes is a unification of machinery used in the process. This leads to an innovation of the methodology and the ways to clamp the component. Other applied alternations focus on a stabilization of the drilling process, which is reached by a choice of new tools and adjustment of cutting parameters. Furthermore, a variable coding of tools in case of automatic tool change is designed. This paper then provides two possible solutions based on proposed changes and alternations. These solutions, together with the tools mentioned, are subjects to a techno-economical assessment.
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Kavan, Petr. "Řešení technologie součásti "víko" v podmínkách středně velké strojírenské firmy." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229896.
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The diploma thesis is concerned with evaluation of actual production technology of part “hydraulics cover” and with design of new, progressive variation machining of this part. Solution is focused at first on rationalization of cutting tools and choice of suitable cutting tools. An effort is to achieve shorter production time and decrease costs on production of component. With this problem is related alteration of technological documentation and technical economic evaluation for determination return rate of investments into progressive cutting tools.
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Ryšavá, Zdeňka. "Technologie obrábění vybrané součásti pro automobilový průmysl." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230050.
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Tato práce se zabývá problematikou nárůstku. Jde o řešení konkrétního průmyslového problému. Pro daný odlitek ze slitiny hliníku a řezný nástroj ze slinutého karbidu je studován výskyt nárůstku pro různé řezné podmínky. Nejprve se práce zabýva rozborem tématiky nárůstku, mechanismy jeho vzniku a parametry, které mají na jeho výskyt a růst největší vliv. Dále je věnována pozornost studiu materiálu odlitku, jeho nové koncepce a původního řešení. Během inovačního procesu došlo k obměně použitého materiálu. Tato změna se na procesu řezání projevila vznikem významného nárůstku, který vede až k úplné destrukci nástroje. Byly provedeny zkoušky tvrdosti a metalografické výbrusy pro detailní popis a srovnání vlastností obou slitin hliníku. Výsledky zkoušek prokazují rozdíly v metalografické struktuře (velikosti dendritů, množství precipitátů) a tvrdosti daných materiálů. Experimentální řešení problému spočívalo v testech vrtání do odlitků ze zkoušených slitin hliníku. Pro jednotlivé vrtací zkoušky byla měněna hodnota posuvu a řezné rychlosti. Za pomoci dynamometru byla měřena posuvová síla, dále byl použit wattmetr k určení příkonu stoje a synchroní funkce CN, jejichž výstupem byla aktuální poloha vřetene a řezný moment. Na zákldě naměřených hodnot byla vypočtena měrná řezná síla pro konkrétní testované řezné podmínky.Mimoto po každém pokusu byly pořízeny fotografie nástroje s daným nárůstkem. Z výsledků vyplývá, že měrná řezná síla má tendenci výrazně klesat se zvyšující se hodnotou posuvu, oproti tomu zvyšující se řezná rychlost nemá tak výrazný účinek na její snižování. Co se týče naměřené tloušťky nárůstku, tak se zvyšující se řeznou rychlostí dochází k jejímu poklesu. V případě růstu posuvu, má nárůstek taktéž tendenci klesat, ale menší měrou oproti předešlému případu. V závěru práce je uvedeno rozmezí řezných rychlostí a posuvů vymezující optimalizovanou zónu pro vrtání dané součásti. Následuje nabídka dalších možných experimentů vážících se k tématu studie.
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Vejtasa, Vladimír. "Aplikace dílenského programování a moderní CAD/CAM technologie pro návrh a výrobu držáku a excentru diferenciálu vozu Formule Student." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231702.
Full textAbstract:
The present master thesis deals with the application of workshop programming and advanced CAD / CAM technology to the design and production of differential holder and eccentric of Formula Student car. The first part characterizes and describes the technology of milling, drilling and boring. There is also a selection of material to be machined, including the characteristics of aluminium and its alloys. The following section describes the construction of differential holder and eccentric in the parametric program Autodesk Inventor and creation of CNC programs using the workshop programming and CAM of PowerMILL system. The conclusion section refers to the production of both components in the training centre BOSCH DIESEL s.r.o in Jihlava. The thesis is concluded with a technical-economic evaluation and analysis of both proposed production variants.
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Ponka, Ondřej. "Návrh výrobní technologie vakuové lisovací formy." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382271.
Full textAbstract:
The master thesis deals with the design and production of the mold for vacuum forming. Specifically, how the existing and new mold materials affect their design and, consequently, their production technology. The thesis contains a brief description of the principle of vacuum molding. Technological and design principles of designing molds. Furthermore, the realization of the solution variants and the simulation of their production. The solved variants are subsequently evaluated from a technical and economic point of view.
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Štěrba, Marek. "Sadová, Bytový dům M1 - stavebně technologický projekt." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372154.
Full textAbstract:
The aim of the diploma thesis is construction-technological project of the whole construction focusing on the main building object - Apartment building, which is based on large-diameter drilling piles. The basis of the work is the budget of the main building and its timetable. Part of the thesis is a solution of organization of construction and design of building site equipment, technological regulation of selected activities, quality control and solution of transport relations including oversized transport. In addition, the design of the machine assembly, assessment of lifting mechanisms, safety and health protection and protection of the environment are solved.
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Hallqvist, Karl. "Högtempererat borrhålslager för fjärrvärme." Thesis, Uppsala universitet, Naturresurser och hållbar utveckling, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-231586.
Full textAbstract:
The district heating load is seasonally dependent, with a low load during periods of high ambient temperature. Thermal energy storage (TES) has the potential to shift heating loads from winter to summer, thus reducing cost and environmental impact of District Heat production. In this study, a concept of high temperature borehole thermal energy storage (HT-BTES) together with a pellet heating plant for temperature boost, is presented and evaluated by its technical limitations, its ability to supply heat, its function within the district heating system, as well as its environmental impact and economic viability in Gothenburg, Sweden, a city with access to high quantities of waste heat. The concept has proven potentially environmentally friendly and potentially profitable if its design is balanced to achieve a good enough supply temperature from the HT-BTES. The size of the heat storage, the distance between boreholes and low borehole thermal resistance are key parameters to achieve high temperature. Profitability increases if a location with lower temperature demand, as well as risk of future shortage of supply, can be met. Feasibility also increases if existing pellet heating plant and district heating connection can be used and if lower rate of return on investment can be accepted. Access to HT-BTES in the district heating network enables greater flexibility and availability of production of District Heating, thereby facilitating readjustments to different strategies and policies. However, concerns for the durability of feasible borehole heat exchangers (BHE) exist in high temperature application.Värmebehovet är starkt säsongsberoende, med låg last under perioder av högre omgivningstemperatur och hög last under perioder av lägre omgivningstemperaturer. I Göteborg finns en stor mängd spillvärme tillgängligt för fjärrvärmeproduktion sommartid när behovet av värme är lågt. Tillgång till säsongsvärmelager möjliggör att fjärrvärmeproduktion flyttas från vinterhalvår till sommarhalvår, vilket kan ge såväl lönsamhet som miljönytta. Borrhålsvärmelager är ett förhållandevis billigt sätt att lagra värme, och innebär att berggrunden värms upp under sommaren genom att varmt vatten flödar i borrhål, för att under vinterhalvåret användas genom att låta kallt vatten flöda i borrhålen och värmas upp. I traditionella borrhålsvärmelager används ofta värmepump för att höja värmelagrets urladdade temperatur, men på grund av höga temperaturkrav för fjärrvärme kan kostnaden för värmepump bli hög. I denna rapport föreslås ett system för att klara av att nå höga temperaturer till en lägre kostnad. Systemet består av ett borrhålsvärmelager anpassat för högre temperaturer (HT-BTES) samt pelletspannor för att spetsa lagrets utgående fluid för att nå hög temperatur. Syftet med rapporten är att undersöka potentialen för detta HT-BTES-system med avseende på dess tekniska begränsningar, förmåga till fjärrvärmeleverans, konsekvenser för fjärrvärmesystemet, samt lönsamhet och miljöpåverkan. För att garantera att inlagringen av värme inte är så stor att priset för inlagrad värme ökar väsentligt, utgår inlagringen från hur mycket värme som kyls bort i fjärrvärmenätet sommartid. I verkligheten finns betydligt mer värme tillgänglig till låg kostnad. När HT-BTES-systemet producerar fjärrvärme, ersätts fjärrvärmeproduktion från andra produktionsenheter, förutsatt att HT-BTES-systemets rörliga kostnader är lägre. I Göteborg ersätts främst naturgas från kraftvärme, men också en del flis. Kostnadsbesparingen beror på differensen för total fjärrvärmeproduktionskostnad med och utan HT-BTES-systemet. Undersökningen visar att besparingen är större om HT-BTES-systemet placeras i ett område där det är möjligt att mata ut fjärrvärme med lägre temperatur. Om urladdning från HT-BTES kan ske med hög temperatur ökar också besparingen. Detta sker om lagrets volym ökar, om avståndet mellan borrhål minskar eller om värmeöverföringen mellan det flödande vattnet i borrhålen och berggrunden ökar. Dessa egenskaper för lagret leder också till minskade koldioxidutsläpp. Storleken på besparingen beror dock i hög grad på hur bränslepriser utvecklas i framtiden. Strategiska fördelar med HT-BTES-systemet inkluderar; minskad miljöpåverkan, robust system med lång teknisk livslängd (för delar av HT-BTES-systemet), samt att inlagring av värme kan ske från många olika produktionsenheter. Dessutom kan positiva bieffekter identifieras. Undersökningen visar att HT-BTES-systemet har god potential att ge lönsamhet och minskad miljöpåverkan, och att anläggning och drift av lagret kan ske utan omfattande lokal miljöpåverkan. Det har också visats att de geologiska förutsättningarna för HT-BTES är goda på många platser i Göteborg, även om lokala förhållanden kan skilja sig åt. För att nå lönsamhet för HT-BTES-systemet krävs en avvägning på utformning av lagret för att nå hög urladdad temperatur utan att investeringskostnaden blir för stor. Undersökningen visar att om anslutning av HT-BTES-systemet kan ske mot befintlig anslutningspunkt eller till befintlig värmepanna kan investeringskostnaden minska och därmed lönsamheten öka. Placering av HT-BTES-systemet i områden med risk för överföringsbegränsningar kan också minska behovet av att förstärka fjärrvärmenätet, och således bidra till att minska de kostnader som förstärkning av nätet innebär. Betydelsefulla parametrar för att nå lönsamhet för HT-BTES-system inkluderar dessutom kostnaden för inlagrad värme liksom vilket vinstkrav som kan accepteras. Tillgång till HT-BTES möjliggör ökad nyttjandegrad och flexibilitet för fjärrvärmeproduktionsenheter, och därmed ökad anpassningsmöjlighet till förändrade förutsättningar på värmemarknaden. Dock återstår att visa att komponenter som klarar de höga temperaturkraven kan tillverkas till acceptabel kostnad.
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林鍾圳. "Study of Ultrasonic Drilling Technology." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/81921790930702451076.
Full textAbstract:
碩士建國科技大學
機械工程系暨製造科技研究所
98
In this study ,we choose suitable drilling conditions of glass. Ultrasonic machining is used drilling process obviously reduce the brittle area. The brittle area around the hole is determined by the AUTOCAD software. Four parameters are analyzed Z-axis feed rate ,each depth of cutting ,spindle speed ,Surface layer on the glass by Taguchi method .The optimal set of parameters are the 0.1 mm/sec for Z-axis feed rate , 0.3 mm for each depth of cutting , 5400 rpm for spindle speed ,alloy（6061-T6） is used as the Surface layer on the glass. The percent of brittle area can in reduced from 10% to 1% for different set of parameters.
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Guan-Lin, Huang, and 黃冠霖. "Laser Drilling Cutting Technology for Touch Panel." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/42583145251063857517.
Full textAbstract:
碩士中華科技大學
機電光工程研究所碩士班
101
The laser drilling cutting technology for touch panel was investigated. High-power laser was used to perform etching on the surface of glass. Material which was brittle or strengthened was removed without contact and stress, thus achieving high yield, ease of machining and no need for other consumables. The disadvantages of traditional high-speed drilling and cutting, such as cracking due to stress on contact or drilling at a slow rate, were improved. The experiment was conducted for the planning of laser processing precision machine using laser drilling cutting process. The assembly, calibration and integrated testing were performed based on the following parameters: Laser power: 3W to 13W; laser triggering pitch: 0.2um to 2um, focal distance: 150.77mm to 153.77mm; and Z-axis feeding distance: 1um to 5um. These parameters were also analyzed for their influence on the quality of process. The result was: the following parameter settings provided the best process quality: laser power: 11W to 12W; laser triggering pitch: 0.6um to 1.0um; focal distance: 153mm to 154mm; and Z-axis feeding distance: 4um to 5um. The experiment result suggested that the edge quality was with no greater than 10um cracks, and the dimensional accuracy and chamfering angle met industrial standards.
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Kathiresan, Dhanush. "Study on Gun Drilling Technology in CNC Machining." Master's thesis, 2019. http://hdl.handle.net/10400.8/4665.
Full textAbstract:
This document is the internship report of the Master in Product Design Engineering carried out at Tecnimoplás Lda. The company Tecnimoplás Lda is dedicated to manufacture of molds. They have an ability to make a small, medium and large size molds. Tecnimoplás is a company started in 1971 based in Marinha Grande, specialized in the service of mold.
With this internship it was possible to get the industrial immersion that was the one of the objectives of the student for this stage. In the company after an initial inclosing, it was possible to develop work in the different equipment’s with different materials for mold in the company machines.
This statement is a detailed description and analytical analysis with various processes to make a mold. In this process one of the main process is Deep Hole Drilling. It is also talking about the various types of tools used in deep hole drilling machines and also discuss about the various types of fixing system in deep hole drilling machines. This deep hole drilling is mainly used for Water and Oil circuit in the mold. This report also comprises of case study of Deep hole drilling process and the void formation in the parts of Deep hole drilling machines.
This work also concluded that it is fundamental that the tools used in Deep Hole drilling, are used within the ranges of operation recommended by the tool’s manufacturers.
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Wu, Chia-Shian, and 吳嘉憲. "Development of A Novel Water-Assisted Laser Drilling Technology." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/3p2k3u.
Full textAbstract:
碩士國立雲林科技大學
機械工程系
102
In this study, we use 532 nm Nd: YAG laser to drill on silicon and aluminum alloy 5052 in air or with the three different assisting types of water, thick or thin water layer and water droplets. This study shows the results of this new water-assisted laser drilling. We first drill a blind hole with a constant laser shot number, then the three types of water are applied to the process separately in order to reduce the heat affected zone (HAZ) and improve the hole roundness. In our experiments of thick water layer, the thciknesses are 1 mm, 2 mm, and 3 mm. In the experiments of thin water layer, water is applied through a syringe with a inner diameter of 70 µm on the substrate. In the experiments of water droplets, they are produced by the same syringe. The droplet is 500 µm above the substrate. In this study, we discuss the effect of three assisting type of water on molten slag, debris, recastign layer, HAZ, and the hole depth in the laser micromachining process. It is found that the slag, debris, recasting layer, and HAZ are greatly reduced with the water-assisted processes. With the assistance of thin water layer, the hole roundness is closer to 1 in low laser shot number and the hole diameter is reduced by 30% compared with the micromachining process in air. Moreover, the machining efficiency is increased twice with the assistance of water droplets.
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Liang, Jia-Ming, and 梁家明. "Study on Turning and Drilling with Vibration Cutting Technology." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/13928115102270357358.
Full textAbstract:
碩士國立雲林科技大學
機械工程系碩士班
90
In this thesis, Vibration Cutting Technology has been applied to the turning, boring and cross holes machining. We analyzed the surface roughness of workpiece and the size of burrs that generated by machining cross holes with the Taguchi method. Further we looked for the best combination of machining parameters that obtained the fine surface roughness and the small burr size. Through the results of experiment, we discuss the effect of vibration cutting on machining quality. Vibration cutting is made by a piezo-electrical actuator. In accordance with the machining type, the vibration cutting device was designed and manufactured to carry out the cutting experiment. We can observe the machined surface and burr of cross holes by optical microscope. Eventually, we analyze the results by Taguchi method. Form the results of the experiment, we found that vibration cutting improved the surface roughness and reduced the burr size. In turning, we acquired the surface roughness of 0.7 with high frequency vibration and the surface roughness was 7 without vibration respectively. In boring, the surface roughness was 0.7 with high frequency vibration and the surface roughness of 2 can be obtained without vibration. When vibration cutting is preceded, it can decrease the heat of cutting and the friction of the interface between tools and chips, and then improve the precision of manufacturing and the surface roughness. Furthermore, the vibration cutting can restrain the size of burr, too.
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Huang, Bo-Ji, and 黃柏齊. "Simulation of Laser Propagation in Water Assisted Laser Drilling Technology." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/fq9p24.
Full textAbstract:
碩士國立雲林科技大學
機械工程系
102
In modern industry, laser is getting popular in the field of micro/nano-machining.However, water-assisted laser micro/nano-machining is still under development. In the thesis, we focus on the simulation of water- assisted laser micro/nano-machining. Two types of water supply are discussed: water micro-droplet on substrates and water layer above substrates. The purpose of the simulations is to provide the process design information in experiments and the in-depth optical physics discussion for this technology. OptisWorks 2006 SP2 and OptiFDTD 32-bit are both the simulation tools used in the thesis. In the first type of water-assisted process, water micro-droplet on substrates,both softwares are used to simulate the optical behavior of laser by geometric optics and electromagnetic field. The results all show the focusing property of the micro-droplet on substrates and demonstrate the application of the droplets on micro/nano-scale machining. In the second type of water-assisted process, water layer above substrates,OptisWorks 2006 SP2 is used in simulation. Two different forms of water layer,millimeter thick layer and ultra-thin layer are discussed in the thesis. The results show the effect of water layer on focal point change on water-assisted machining process. Meanwhile, they provide the energy distribution information for process designers.
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King, Lauren. "A Study To Determine Necessity of Pilot Holes When Drilling Shallow Gas Zones Using Top Hole Dual Gradient Drilling Technology." 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-591.
Full textAbstract:
When drilling offshore, shallow gas hazards are a major concern because of their
potential to cause a major blowout. This is a special concern when drilling in shallower
water, where the gas influx reaches the rig sooner. A common practice used to avoid the
potential dangers of shallow gas is to drill a pilot hole through the shallow gas zone with
the hope that the smaller diameter hole will prevent such a large influx. The use of dual-gradient
top hole drilling technology would allow for a larger hole to be drilled and the
possible gas influx to be killed dynamically, which I have simulated with the use of a
top hole dual-gradient simulator.
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Yang, Ren-Hau, and 楊仁豪. "Study of Vibration Drilling Technology on Aluminum Alloys and Composite Materials." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/04904920246903674825.
Full textAbstract:
碩士國立雲林科技大學
機械工程系碩士班
92
In this study, Vibration Drilling Technology has been applied to the aluminum alloys 6061-T6 and composite materials processing. Vibration drilling device is made by a piezo-electrical actuator and it can produce micro-amplitude vibration. The cutting thrust forces signals were measured with a Kistler mode 9272 four-components dynamometer, and then saved to a personal computer. We analyzed the thrust forces of workpiece materials and used Taguchi method looking for optimal vibration parameters. Through the results of experiment , we discuss the effect of vibration drilling on machining quality. From the results of the vibration drilling experiment, we found that thrust force with vibration is 20% less than conventional cutting for the same drilling parameters. This indicates that the vibration drilling method is suitable for drilling aluminum alloys 6061-T6 and composite materials. But the theories of plastic deformation used in metal cutting should not be transplanted in composite materials cutting. Because composite material is composed of brittle epoxy resin and abundant fiber , its cutting process is determined by the properties of the two materials.