Academic literature on the topic 'Milling efficiency'
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Journal articles on the topic "Milling efficiency"
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Dabbas, Hasan Al. "A Study of Efficiency Eccentric Drilling-Milling Chuck." International Journal of Materials, Mechanics and Manufacturing 3, no. 1 (2015): 5–8. http://dx.doi.org/10.7763/ijmmm.2015.v3.155.
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Li, Feng, Fang Yu Peng, Yong Wang, Rong Yan, and Bin Li. "Optimization of Parameters of Aircraft Landing Gear with Orthogonal Turn-Milling Based on GRA-PSO Algorithm." Advanced Materials Research 852 (January 2014): 730–34. http://dx.doi.org/10.4028/www.scientific.net/amr.852.730.
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In the light of the characteristic of 300M ultra high strength steel and the feature of orthogonal turn-milling machining,an optimization model of orthogonal turn-millng machining parameters is consisted of maximum tool life,minimum surface roughness and maximum productivity. Based on multi-objective optimazation algorithm which is applied in coupling particle swarm optimization algorithm and gray relevancy analysis,it can achieve the purpose which is above mentioned. By introducing the chatter stability lobe diagram of aircraft landing gear with orthogonal turn-milling which is conformed with DMG turn-milling machine tool,it can optimize the parameters of the orthogonal turn-milling machining of the aircraft landing gear with high efficiency and good quality.
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Zhu, Zhaolong, Dietrich Buck, Xiaolei Guo, Xianqing Xiong, Wei Xu, and Pingxiang Cao. "Energy Efficiency Optimization for Machining of Wood Plastic Composite." Machines 10, no. 2 (2022): 104. http://dx.doi.org/10.3390/machines10020104.
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Enhancing energy efficiency is the key to realizing green manufacturing. One major area of interest in this regard is the improvement of energy efficiency of machine tools during the production of building materials. This project focuses on energy efficiency during the spiral milling of wood plastic composites. To this end, a response surface method was adopted to develop a model and establish the relationship between energy efficiency and milling conditions. Analysis of variance based on individual factors as well as two-factor interactions was performed to gauge their effects on energy efficiency. It was found that milling depth was positively correlated to power efficiency, while spiral angle and feed per tooth displayed non-monotonic behavior. An attempt was made to predict milling conditions that will yield the greatest material removal rate and power efficiency. For wood plastic composites subjected to up-milling, it was determined that a feed per tooth of 0.1 mm, milling depth of 1.5 mm, and spiral angle of 70° were ideal. Considering the potential improvements in energy efficiency and surface quality that these process parameters will bring, it is strongly recommended for use in the industrial machining of wood plastic composites.
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Jiang, Bin, Lili Fan, Peiyi Zhao, Yufeng Song, and Bin Wang. "Modeling and Distribution Identification of Instantaneous Cutting Energy Efficiency of Milling Cutter under Vibration." Applied Sciences 12, no. 21 (2022): 10816. http://dx.doi.org/10.3390/app122110816.
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The instantaneous cutting energy efficiency of a milling cutter is an important index to evaluate the cutting performance of the milling cutter. The existing models for cutting energy efficiency ignore the differences in the instantaneous cutting energy efficiency of each cutter tooth. In this work, according to the influence of milling vibration on instantaneous cutting posture and the input and output energy, a correlation model of the instantaneous cutting energy efficiency of a milling cutter and its cutter teeth was established. Using the cutting-force energy efficiency and the specific cutting energy and their distribution on the cutting edge of the cutter teeth, the dynamic relationship between the effective cutting energy transfer and conversion of the milling cutter was characterized. The instantaneous cutting-force energy efficiency and specific cutting energy were calculated. The formation of the dynamic distribution of the cutting energy efficiency was unveiled. Finally, an identification method for distributive variation in the instantaneous cutting energy efficiency of the milling cutter was proposed. The response of the distribution of the instantaneous cutting energy efficiency was studied and verified using experiments. The results showed that there was high similarity and good agreement between the calculated and measured results of the cutting energy efficiency of the milling cutter.
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Dias, Jeferson Almeida, Vera Lúcia Arantes, Alfeu Saraiva Ramos, et al. "Synthesis and Photocatalytic Evaluation of Nanocrystalline ZnO Obtained by High Energy Milling." Materials Science Forum 869 (August 2016): 789–94. http://dx.doi.org/10.4028/www.scientific.net/msf.869.789.
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Photocatalytic processes have been applied to treatment of organic effluents through the mineralization of these pollutants on a semiconductor surface. Obtaining nanosemiconductors is desirable for the increasing of particle surface area and improvement in photocatalytic efficiency. In this paper, it was evaluated the influence of High Energy Milling (HEM) as a technique to produce nanocrystalline zinc oxide. The photocatalytic activity of the milled powders to degrade Rhodamine-B dye when exposed to ultraviolet and visible radiation also was investigated. The powders were milled during 4 and 10 hours by dry media milling and 10 hours by wet media milling. The results indicated that there were no detectable powder contamination during the millings and the reduction of crystallite size was function of time and media of milling. All of the assessed samples demonstrate high degradation of the dye, which corroborates with the potentiality of this technique to photocatalysts production. The material milled during 10 hours by dry media milling showed the best results under the experimental conditions.
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Evseev, Dmitriy, Yuriy Kulikov, Aleksey Popov, and Maksim Yagodkin. "IMPROVING THE EFFICIENCY OF REPAIR OF ROLLING STOCK WHEEL PAIRS." Transport engineering 2022, no. 11 (2022): 24–31. http://dx.doi.org/10.30987/2782-5957-2022-11-24-31.
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The possibility of using face milling to restore the tread surface of railway wheel pairs is studied. On the basis of simulation modeling, a conclusion is made about the prospects of using this method for repair. The study objective is to improve the efficiency of repair of rolling stock wheel pairs. The task to which the paper is devoted is the expediency of using face milling when repairing wheel pairs. Research method is modeling. The novelty of the work: defining the possibility of using face milling for the repair of wheel pairs. Study results: the expediency and efficiency of face milling for the repair of rolling stock wheel pairs are found. Conclusions: the use of a new face milling method (turn milling) helps to reduce the complexity of the operation, as well as to increase the resource of wheel pairs in operation due to machining with a minimum allowance.
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Zhao, Peng Bing, and Yao Yao Shi. "Experimental Research on Compound and Efficient Powerful Milling Process of Blisk." Advanced Materials Research 314-316 (August 2011): 1150–53. http://dx.doi.org/10.4028/www.scientific.net/amr.314-316.1150.
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According to the problems of low efficiency and high cost in blisk manufacturing, based on large margin slotting and rough machining, a kind of compound and efficient powerful milling process was proposed, that is, disc milling-plunge milling-flank milling. In order to compare the effect of this new process and the traditional plunge milling or flank milling, experiment on disc milling and plunge milling processing performance was carried out. Compared with plunge milling, the cutting force and tool vibration of disc milling are larger, but its processing efficiency was improved significantly. The experiment proved that the compound and efficient powerful milling process is feasible and effective for the large margin slotting and rough machining of blisk.
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Miroshnychenko, Оleksandr, and Viktor Serhiienko. "NCREASING THE EFFICIENCY OF MILLING THE SURFACES OF ENDOPROTHESES." Scientific Papers оf DonNTU: Mechanical Engineering and Machine Science 1, no. 15 (2023): 36–44. http://dx.doi.org/10.31474/2308-5312-2023-1-15-36-44.
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Purpose to work: is to increase the efficiency of milling endoprosthesis components, taking into account their kinematic characteristics. Methodology: theoretical research was carried out on the basis of mathematical analysis, computer modeling using modern software and computing equipment. The PowerMILL CAM system was used for statistical processing of milling trajectories. Results: when manufacturing endoprosthesis components, the best processing strategies were "Selection of 3D model by model shift" and "Selection of 3D model by shift". These two strategies give the lowest idle time for the lowest core processing time. Machine processing time when using the strategies "3D model selection" by model shift and "3D model selection" by shift is reduced by 2 times compared to the "3D model selection" raster strategy, and by 3 times compared to the "3D model selection" strategy Vortex. However, it should be noted that all 4 studies were conducted at the same cutting modes, which are not typical for high-speed milling. Vortex's "3D Model Selection" is ineffective in these cutting modes due to the fact that it is designed exclusively for high-speed milling. "Sampling a 3D model" with a raster also turned out to be ineffective due to the fact that it is intended for work on open planes. Scientific novelty: the most effective milling strategy for the manufacture of endoprosthesis components is proposed. Practical significance: recommendations for the use of milling strategies are given. Key words: milling, strategy, endoprosthesis, idle movements, model, technological process, operation, machine time.
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Zhang, Xiao Hong, and Guo Fu Yin. "Milling Parameters Optimization by Grey Relation Theory." Applied Mechanics and Materials 117-119 (October 2011): 1708–13. http://dx.doi.org/10.4028/www.scientific.net/amm.117-119.1708.
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Propose the grey relation theory for influence of electric milling on machining targets in achieving parameter optimization, when an engine cylinder head milling processing under plane milling tool. The experiment was designed via orthogonal experimental design technique. Some parameters such as machining distortion, surface roughness and machining efficiency were chosen as machining targets, and the milling speed, feed per tooth and milling depth were chosen as milling parameters, calculate and analyze the grey relational degree and relational coefficient between milling parameters and machining targets. The optimized milling parameters including milling speed of 380m/min, feed per tooth of 0.05mm, and milling depth of 1.5mm were obtained in single-object and multi-objects. Experimental results show that the machining distortion of 0.055mm, the surface roughness of 0.7964μm and the machining efficiency of 36.3 mm3/min are excellent according to the optimized designs, and the machining efficiency and the machining quality are improved greatly.
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Zheng, Zhong Peng, Xin Jin, Ye Wang Sun, Xin Yang Jiang, Zhi Jing Zhang, and Bing Bing Liu. "Research on Cutting Stability of High-Efficiency Micro Turn-Milling Compound Machine Tool Based on Lobes." Solid State Phenomena 295 (August 2019): 59–65. http://dx.doi.org/10.4028/www.scientific.net/ssp.295.59.
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In order to improve the cutting stability of high-efficiency micro turn-milling machine tools, avoid the chattering problem during the cutting process. In this paper, the chatter problem in the cutting process is studied based on the stable lobes. By analyzing the high-efficiency turn-milling machine tool mechanism and the turn-milling model, the micro turn-milling dynamic dynamic vibration model and the mathematical model of turn-milling chatter are obtained. Then, based on the hammer test method, the transfer function of the tool-workpiece system is obtained, and the turn-milling stable lobes of the high-efficiency micro turn-milling machine tool is constructed. Finally, the research on the stable zone of the turning main spindle parts, the turning back spindle parts and the high-frequency milling part are completed. The experimental research results guide and optimize the selection of cutting parameters for turn-milling process.
Dissertations / Theses on the topic "Milling efficiency"
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Johansson, Anna. "Correlation between process parameters and milling efficiency." Thesis, Uppsala universitet, Oorganisk kemi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-179625.
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An experimental ball-milling study was performed to compare the deagglomeration behavior and the evolution of the particle size distribution with increasing milling time of two relatively coarse WC powders used for the production of cemented carbide cutting tools. The WC-powders were found to have distinctly different particle size distributions and particle morphologies prior to milling. Lab-scale WC samples were made using a range of different process parameters and milling times. These were then analysed by means of microscopy, laser light scattering, gas adsorption BET analysis and X-ray powder diffraction, XRD, to attain particle size distribution, specific surface area and a mean crystal size, respectively. The results suggested a linear relation between log(particle size) and log(milling time) between 10 and 80 hours milling. The viscosity was shown to have a minor effect on the milling efficiency. Both the number of collisions of milling balls per unit time as well as the kinetic energy of the milling ball affected the size reduction; more collisions or higher energy resulted in a higher milling efficiency. The evaluation of the effect of the process parameters on milling efficiency was facilitated by the use of simple scaling factors. For example, all milling curves for samples with different WC amounts coincided when rescaling the milling time using a scaling factor based on the weight of the WC and milling balls. The same scaling factor could be used with success for rescaling the results from different trials obtained with laser light scattering, gas adsorption and XRD. The results of this work are useful for future work on modeling of the milling process which should lead to more accurate predictions of the outcome of milling unit operations.
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Tristo, Gianluca. "Tool wear compensation and energy efficiency in micro milling Electrical-Discharge Machining." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3423824.
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This thesis is aimed at enhancing the accuracy and the sustainability of the micro Milling Electrical-Discharge Machining process.
A framework for the simulation and validation of tool wear compensation models is developed. An on-line tool wear compensation method based on discharge counting and tool wear per discharge is proposed. The mean discharge energy and the variability of the characteristics of the discharges acquired during a pocketing operation are analysed. Optimal trigger values for discharge counting are defined.
A custom hardware interface and software protocol to command the micro EDM machine from Matlab programming language is developed and tested. A strategy to perform on-machine volume measurement is developed and the repeatability and uncertainty of measures are studied. An evaluation of the errors affecting micro EDM on-machine measurements is carried out.
The custom communication interface and the on-machine measurement procedure are employed in automatic assessment of material removal and tool wear per discharge. The procedure is tested in a wide range of process parameters and the variability of MRD and TWD values are evaluated.
A material removal simulation tool for accurate workpiece representation of the machined geometry, based on MRD and counted discharges, is developed and validated.
Finally, a low-cost, modular framework for remote energy monitoring, based on open-hardware and open-source software is developed and employed for the energy efficiency analysis of the micro EDM machine. Expedients to improve the energy efficiency of the micro EDM machine and of the process are suggested.<br>Le attività descritte in questa tesi si prefiggono come obiettivo il miglioramento nell'accuratezza e nell'efficienza energetica del processo di micro elettroerosione nella configurazione in fresatura.
A tal fine, è stato sviluppato un pacchetto hardware e software necessario per la simulazione e la validazione di strategie per la compensazione on-line dell'usura utensile. E' stato definito un metodo di compensazione usura utensile basato sul conteggio delle scariche elettriche e sul valore di usura utensile per singolo impulso. L'energia media delle scariche elettriche acquisite durante una lavorazione tipo e la loro variabilità sono state analizzate e sono stati definiti i valori di soglia ottimali per il conteggio degli impulsi tramite frequenzimetro.
Una interfaccia hardware e un protocollo software sono stati implementati e testati al fine di comandare la macchina per micro elettroerosione attraverso un personal computer esterno, programmando in linguaggio Matlab. E' stata definita una strategia per la misura in macchina del volume di materiale rimosso sia dall'utensile sia dal pezzo durante il processo di elettroerosione. Sono stati quindi valutati la ripetibilità, l'incertezza e l'errore relativo caratteristici delle misure effettuate in macchina con la procedura proposta.
L'interfaccia di comunicazione e la strategia per la misura in macchina sono stati quindi adottati in una procedura automatizzata per la stima dei valor medi di materiale rimosso ed usura utensile per singola scarica elettrica. La procedura è stata testata con un ampio campo di parametri di processo, al fine di valutare la variabilità dei risultati.
Uno strumento software per la simulazione del processo di rimozione del materiale dal grezzo basato sul volume rimosso per singola scarica e sul numero di impulsi contati, è stato sviluppato al fine di rappresentare in modo accurato le geometrie effettivamente ottenute durante un generico processo di micro elettroerosione. Le simulazioni sono state validate per mezzo di risultati sperimentali.
Infine, un sistema modulare a basso costo per il monitoraggio remoto del consumo di energia, basato su open-hardware e software open-source è stato sviluppato ed utilizzato per l'analisi dell'efficienza energetica della macchina per micro elettroerosione. Dall'analisi dei risultati sono state individuate delle possibili soluzioni per migliorare l'efficienza energetica della macchina e del processo di micro elettroerosione.
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Johnson, Brent S. "Benefits of flour storage as related to process efficiencies in milling." Thesis, Kansas State University, 2012. http://hdl.handle.net/2097/15057.
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Master of Agribusiness<br>Department of Agricultural Economics<br>Bryan Schurle<br>The milling of wheat into white flour is a high volume, low margin business. Flour is a commodity. Competition is fierce. Over the past several years, there have been several mergers and acquisitions leading to fewer, but larger flour mills. The number of companies in the flour milling business has diminished as well. Flour sold in small packages on the grocery store shelf is but a small part of the business these days. Most flour is sold to commercial bakers in large bags or bulk trucks.
The process of milling wheat into white flour consists of numerous variables within an extensive collection of equipment. It is the job of the miller to minimize the negative impact of these variables or at least hold constant as many of these variables as possible while achieving the best efficiency possible. To lessen the effect of these numerous variables on a large extensive system makes for a well running operation. When efficiency is achieved, a flour milling operation can be a profitable venture. A number of the variables that influence efficiency are affected by the amount of flour storage that a flour mill has.
This thesis examines the benefits of flour storage as related to flour process efficiencies in milling. With flour mills operating at large output capacities, it is necessary for a flour mill to have adequate bulk flour storage bins as well as the right amount of warehouse space. Changes from one type flour to another in a flour mill require some time and an abundance of intervention by a skilled operator or miller. Having the proper amount of storage space makes it possible to minimize changes as well as the opportunity to optimize production of each specific flour type that is processed on the mill. To justify capital project money to invest in the proper amount of storage can be a challenge. Warehouse space and bulk flour storage can be expensive, and it is difficult to quantify how theoretical improvements will increase production and quality in the end product of flour.
Using regression methods, production data obtained from an average sized commercial flour mill was used to estimate the increase in extraction due to a longer length of run allowed by the addition of storage space. By increasing the time a mill stays on a specific wheat mix to a minimum of twenty hours, there is a theoretical increase in extraction of 1.02 percentage points, resulting in wheat savings of over $500,000 per year. This resulting savings on the raw input material showed that capital expenditures on storage can be justified. A positive net present value and good internal rate of return show that the increased efficiency due to longer lengths of run justified the additional expense of the additional storage capacity.
As volatility and the price per bushel of grain continue to increase, having the proper plant infrastructure with regard to storage space is of the utmost importance. Other benefits of storage will be realized as well in the area of flour quality and customer service.
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Mog, David L. "An analysis of factors influencing wheat flour yield." Thesis, Kansas State University, 2011. http://hdl.handle.net/2097/12452.
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Master of Agribusiness<br>Department of Agricultural Economics<br>John A. Fox<br>The cost of wheat is the largest input cost for a flour mill, and as a result, profitability in wheat flour milling is determined in large part by milling efficiency – i.e., the amount of flour extracted per unit of wheat milled. In this project the objective was to quantify the influence of several measurable variables on flour mill efficiency. Data was collected from two commercial milling units of similar size. Linear regression was then used to estimate the relationship between flour yield and variables measuring grain characteristics and environmental factors. The analysis suggests that increasing ambient temperature and the occurrence of downtime both have a significant negative effect on flour yield. A significant difference in flour yield efficiency was also found between the two mills.
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Koudela, Michal. "Návrh na zefektivnění procesu obrábění válcové součásti pro ropné vrty." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231121.
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This diploma thesis is concerned with a proposal for increasing the efficiency of machining when manufacturing an inner sleeve at the company Sanborn a.s. In the diploma thesis, the technology used for machining itself is first briefly described, followed by a description of the original production technology including a description of machine and hand tools used and cutting conditions. The next part of the paper describes the proposal for increasing the efficiency of machining operations. The proposal includes a description of the suggested solution that will lead to increased efficiency, a machine proposed for the specific operation, appropriate tools and proposed cutting conditions. The benefits of implementing the proposal are also described here, both in terms of saving unit time, and in terms of the machining technology itself, where, for example, the formation of chips is improved, the inner tension of machined components reduced, etc. The diploma thesis further includes a technical-economic evaluation assessing the economic benefits of the changes introduced.
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Thaval, Omkar P. "Modelling the flow of cane constituents through the milling process of a raw sugar factory." Thesis, Queensland University of Technology, 2012. https://eprints.qut.edu.au/60915/1/Omkar_Thaval_Thesis.pdf.
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This thesis reports on an investigation to develop an advanced and comprehensive milling process model of the raw sugar factory. Although the new model can be applied to both, the four-roller and six-roller milling units, it is primarily developed for the six-roller mills which are widely used in the Australian sugar industry. The approach taken was to gain an understanding of the previous milling process simulation model "MILSIM" developed at the University of Queensland nearly four decades ago. Although the MILSIM model was widely adopted in the Australian sugar industry for simulating the milling process it did have some incorrect assumptions. The study aimed to eliminate all the incorrect assumptions of the previous model and develop an advanced model that represents the milling process correctly and tracks the flow of other cane components in the milling process which have not been considered in the previous models.
The development of the milling process model was done is three stages. Firstly, an enhanced milling unit extraction model (MILEX) was developed to access the mill performance parameters and predict the extraction performance of the milling process. New definitions for the milling performance parameters were developed and a complete milling train along with the juice screen was modelled. The MILEX model was validated with factory data and the variation in the mill performance parameters was observed and studied. Some case studies were undertaken to study the effect of fibre in juice streams, juice in cush return and imbibition% fibre on extraction performance of the milling process. It was concluded from the study that the empirical relations developed for the mill performance parameters in the MILSIM model were not applicable to the new model. New empirical relations have to be developed before the model is applied with confidence.
Secondly, a soluble and insoluble solids model was developed using modelling theory and experimental data to track the flow of sucrose (pol), reducing sugars (glucose and fructose), soluble ash, true fibre and mud solids entering the milling train through the cane supply and their distribution in juice and bagasse streams.. The soluble impurities and mud solids in cane affect the performance of the milling train and further processing of juice and bagasse. New mill performance parameters were developed in the model to track the flow of cane components. The developed model is the first of its kind and provides some additional insight regarding the flow of soluble and insoluble cane components and the factors affecting their distribution in juice and bagasse. The model proved to be a good extension to the MILEX model to study the overall performance of the milling train.
Thirdly, the developed models were incorporated in a proprietary software package "SysCAD’ for advanced operational efficiency and for availability in the ‘whole of factory’ model. The MILEX model was developed in SysCAD software to represent a single milling unit. Eventually the entire milling train and the juice screen were developed in SysCAD using series of different controllers and features of the software. The models developed in SysCAD can be run from macro enabled excel file and reports can be generated in excel sheets. The flexibility of the software, ease of use and other advantages are described broadly in the relevant chapter. The MILEX model is developed in static mode and dynamic mode. The application of the dynamic mode of the model is still under progress.
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Hapala, Václav. "Návrh na zefektivnění výroby strojírenského dílu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-402540.
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The master's thesis deals with the proposal of more effective production of a part. The theoretical part describes the technology of milling and drilling and the practical part focuses on the analysis of the current part production technology and the consumption of the machining time as assessment of the current machining process efficiency. The next part contains characteristics of the innovative technology, used tools and fixtures. In the conclusion both variants of production, the comparison of consumed machine time and production costs are evaluated.
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Чвартацький, Роман Ігорович, Р. И. Чвартацкий та R. I. Chvartatskyi. "Обґрунтування параметрів машин для подрібнення і змішування кормів". Thesis, Тернопільський національний технічний університет ім. Івана Пулюя, 2017. http://elartu.tntu.edu.ua/handle/lib/20675.
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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.05.11 – машини і засоби механізації сільськогосподарського виробництва. – Тернопільський національний технічний університет імені Івана Пулюя, м. Тернопіль, 2017.<br>Диссертация на соискание ученой степени кандидата технических наук по специальности 05.05.11 – машины и средства механизации сельского производства –Тернопольский национальный технический университет имени Ивана Пулюя. Тернополь 2017.<br>Thesis for a Candidate’s Degree in Technical Sciences, specialty 05.05.11 – Machinery and Means of Mechanization of Agricultural Production. – Ternopil Ivan Puliui National Technical University, Ternopil, 2017.<br>Дисертаційна робота присвячена проектуванню й виготовленню технологічного устаткування та інструментів машин, що подрібнюють і змішують корми для тваринництва. Для вирішення поставлених завдань проведено комплекс теоретичних та експериментальних досліджень процесів подрібнення й змішування кормів. Виведено аналітичні залежності для визначення силових, конструктивних і технологічних параметрів технологічного обладнання і оснащення. Досліджено вплив кількості обертів, коефіцієнта заповнення бункера та інших параметрів продуктивності та якості кормових сумішей. Визначено динамічні навантаження в елементах приводів подрібнювачів, розроблено програму розрахунку динамічних навантажень та відображення отриманих результатів у графічному та текстовому вигляді. Програма дає можливість визначити динамічні параметри системи під час пуску установки з навантаженням і без нього за різних режимів роботи.<br>Диссертационная работа посвящена проектированию и изготовлению технологического оборудования и инструментов для машин для измельчения и смешивания кормов. Для решения поставленных задач проведен комплекс теоретических и экспериментальных исследований процессов измельчения и смешивания кормов. Выведены аналитические зависимости для определения силовых, конструктивных и технологических параметров технологического оборудования и оснастки для изготовления кормов. Проведено исследование определения влияния количества оборотов, коэффициента заполнения бункера и других параметров на производительность и качество кормовых смесей.
Определены динамические нагрузки в элементах приводов измельчителей. С помощью программы на языке Pascal в среде Delphi разработано программа расчета динамических нагрузок и отображения полученных результатов в графическом и текстовом виде. Программа дает возможность определить динамические параметры системы в различных режимах работы при пуске установки с нагрузкой и без нее для различных режимов работы.
Получены математические соотношения, описывающие законы изменения определяющих параметров динамического процесса в зависимости от физико-механических, кинематических, геометрических параметров, внешних и внутренних факторов. Для обеспечения эффективной производительности процесса измельчения корнеплода, установлено линейную зависимость от ширины бункера B, скорости V и угла раствора бункера.<br>Thesis research is concerned with designing and making processing equipment and instruments for machines that mill and mix fodder for livestock. In order to solve the set tasks we have conducted a complex of theoretical and experimental investigations of the processes of milling and mixing fodder. Analytic dependencies for the determination of power, design and process parameters of processing equipment and tooling have been developed. Investigation of the influence of a number of revolutions, filling coefficient of a hopper and other parameters on the efficiency and on the quality of feed mix has been conducted. Dynamic loads on the elements of milling machines have been determined, with the help of Pascal program using Delphi technique a dynamic load screening program has been developed with further graphical and text representation of the obtained results. The program enables determining dynamic parameters of the system at its start both with load and without load under various operating conditions.
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Joy, Jimin. "Efficient and accurate geometric simulation of multi-axis milling operations." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/63088.
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The full abstract for this thesis is available in the body of the thesis, and will be available when the embargo expires.<br>Applied Science, Faculty of<br>Mechanical Engineering, Department of<br>Graduate
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Kumazawa, Guillermo Hiroki. "Generating efficient milling tool paths according to a preferred feed direction field." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/43653.
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A new method is presented to generate ball-end milling tool paths for the efficient three-axis machining of sculptured surfaces. The fundamental principle of the presented method is to generate the tool paths according to a preferred feed direction (PFD) field derived from the surface to be machined. In this work, the PFD at any point on the surface is the feed direction that maximizes the machining strip width. Theoretically, tool paths that always follow the direction of maximum machining strip width at each cutter contact point on the surface would maximize material removal, which leads to the shortest overall tool path length.
Scallops are generated when a surface is machined using three-axis ball-end mills. There is no redundant machining if the scallop height is always maximized and the neighboring machining strips do not overlap. Unfortunately, these overlaps commonly exist for tool paths always following the preferred directions. Such redundant machining can be reduced via iso-scallop tool paths. Nonetheless, iso-scallop tool paths do not in general follow the preferred feed directions.
To attain maximum machining efficiency via generating the shortest overall tool path length, the presented method analyzes the PFD field of the surface and segments the surface into distinct regions with similar PFD's by identifying the degenerate points and generating their separatrices. The tool paths of each region are generated by the iso-scallop method to mitigate redundant machining. Since a sequential approach is employed to generate the iso-scallop tool paths, an initial tool path is selected in such a way that the growing deviations of the subsequent tool paths from the PFD's are not significant. The proposed method has been validated with numerous case studies, showing that the generated tool paths have a shorter overall length compared with those generated by the existing methods.
Books on the topic "Milling efficiency"
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Energy efficiency improvement and cost saving opportunities for the corn wet milling industry: An Energy Star guide for energy and plant managers. Ernest Orlando Lawrence Berkeley National Laboratory, 2003.
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Majumdar, Sumit K. Productive Efficiency Analysis over Six Decades. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199641994.003.0006.
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This chapter contains an efficiency analysis for Indian industry from 1950–51 to 2013–14. Overall, there had been consistent growth in manufacturing employment over six decades, though by the 2010s only 13 million persons, or 0.1% of the population, had industrial jobs. Capital widening and deepening in India was substantial. In the 1950s, productive efficiency was high. In the 1960s, average productive efficiency declined sharply. In the 1970s, productive efficiency declined and stagnated till the 1980s when it started rising again. In the 1990s, productive efficiency rose and efficiency patterns were stable till the late 2010s when decline set in. Productive efficiency began a downward trend in the 2010s. In spite of capital widening and deepening, Indian industry was inept at managing technology. Indian industry has not possessed the competence to handle the knowledge embodied in fixed capital inputs, which is a hallmark of modern economies.
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Sinema, Kyrsten. Who Must Die in Rwanda's Genocide? The Rowman & Littlefield Publishing Group, 2015. https://doi.org/10.5040/9781978739925.
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This book provides a juridical, sociopolitical history of the evolution of the 1994 Rwandan genocide. Over one million citizens were massacred in less than 100 days via a highly organized, efficiently executed genocide throughout the tiny country of Rwanda. While genocide is not a unique phenomenon in modern times, a genocide like Rwanda’s is unique. Unlike most genocides, wherein a government plans and executes mass murder of a targeted portion of its population, asking merely that the majority population look the other way, or at most, provide no harbor to the targeted population (ex: Germany), the Rwandan government relied heavily on the civilian population to not only politically support, but actively engage in the acts of genocide committed over the 100 days throughout the spring of 1994. This book seeks to understand why and how the Rwandan genocide occurred. It analyzes the colonial roots of modern Rwandan government and the development of the political “state of exception” created in Rwanda that ultimately allowed the sovereign to dehumanize the minority Tutsi population and execute the most efficient genocide in modern history.
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Marcotte, Eric. Bariatric Surgery in the Elderly. Edited by Tomasz Rogula, Philip Schauer, and Tammy Fouse. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780190608347.003.0022.
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The U.S. census revealed that, in 2010, the “older population,” age 65 and older, represented 13% of the population (40.2 million people). The percentage will increase with time and will be 19.3% (72.1 million people) by 2030 and 20.2% (88.5 million people) by 2050, largely due to the aging baby boomer generation. Data from the Centers for Disease Control and Prevention showed that 14% of the general population age 60 had a BMI ≥ 35, with the higher-risk groups of Hispanic and non-Hispanic black communities reaching 16.7% and 20.1%, respectively. It is recognized that elderly obese patients present with a higher frequency of comorbidities than their younger counterparts, most likely related to the duration of their disease. Although initial studies demonstrated an increased risk in elderly patients, bariatric surgery has since been demonstrated to be a safe and efficient treatment option, as long as older patients undergo complete medical optimization prior to undergoing surgery.
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Hilgurt, S. Ya, and O. A. Chemerys. Reconfigurable signature-based information security tools of computer systems. PH “Akademperiodyka”, 2022. http://dx.doi.org/10.15407/akademperiodyka.458.297.
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The book is devoted to the research and development of methods for combining computational structures for reconfigurable signature-based information protection tools for computer systems and networks in order to increase their efficiency. Network security tools based, among others, on such AI-based approaches as deep neural networking, despite the great progress shown in recent years, still suffer from nonzero recognition error probability. Even a low probability of such an error in a critical infrastructure can be disastrous. Therefore, signature-based recognition methods with their theoretically exact matching feature are still relevant when creating information security systems such as network intrusion detection systems, antivirus, anti-spam, and wormcontainment systems. The real time multi-pattern string matching task has been a major performance bottleneck in such systems. To speed up the recognition process, developers use a reconfigurable hardware platform based on FPGA devices. Such platform provides almost software flexibility and near-ASIC performance. The most important component of a signature-based information security system in terms of efficiency is the recognition module, in which the multipattern matching task is directly solved. It must not only check each byte of input data at speeds of tens and hundreds of gigabits/sec against hundreds of thousand or even millions patterns of signature database, but also change its structure every time a new signature appears or the operating conditions of the protected system change. As a result of the analysis of numerous examples of the development of reconfigurable information security systems, three most promising approaches to the construction of hardware circuits of recognition modules were identified, namely, content-addressable memory based on digital comparators, Bloom filter and Aho–Corasick finite automata. A method for fast quantification of components of recognition module and the entire system was proposed. The method makes it possible to exclude resource-intensive procedures for synthesizing digital circuits on FPGAs when building complex reconfigurable information security systems and their components. To improve the efficiency of the systems under study, structural-level combinational methods are proposed, which allow combining into single recognition device several matching schemes built on different approaches and their modifications, in such a way that their advantages are enhanced and disadvantages are eliminated. In order to achieve the maximum efficiency of combining methods, optimization methods are used. The methods of: parallel combining, sequential cascading and vertical junction have been formulated and investigated. The principle of multi-level combining of combining methods is also considered and researched. Algorithms for the implementation of the proposed combining methods have been developed. Software has been created that allows to conduct experiments with the developed methods and tools. Quantitative estimates are obtained for increasing the efficiency of constructing recognition modules as a result of using combination methods. The issue of optimization of reconfigurable devices presented in hardware description languages is considered. A modification of the method of affine transformations, which allows parallelizing such cycles that cannot be optimized by other methods, was presented. In order to facilitate the practical application of the developed methods and tools, a web service using high-performance computer technologies of grid and cloud computing was considered. The proposed methods to increase efficiency of matching procedure can also be used to solve important problems in other fields of science as data mining, analysis of DNA molecules, etc. Keywords: information security, signature, multi-pattern matching, FPGA, structural combining, efficiency, optimization, hardware description language.
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Voll, Reinhard E., and Barbara M. Bröker. Innate vs acquired immunity. Oxford University Press, 2013. http://dx.doi.org/10.1093/med/9780199642489.003.0048.
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The innate and the adaptive immune system efficiently cooperate to protect us from infections. The ancient innate immune system, dating back to the first multicellular organisms, utilizes phagocytic cells, soluble antimicrobial peptides, and the complement system for an immediate line of defence against pathogens. Using a limited number of germline-encoded pattern recognition receptors including the Toll-like, RIG-1-like, and NOD-like receptors, the innate immune system recognizes so-called pathogen-associated molecular patterns (PAMPs). PAMPs are specific for groups of related microorganisms and represent highly conserved, mostly non-protein molecules essential for the pathogens' life cycles. Hence, escape mutants strongly reduce the pathogen's fitness. An important task of the innate immune system is to distinguish between harmless antigens and potentially dangerous pathogens. Ideally, innate immune cells should activate the adaptive immune cells only in the case of invading pathogens. The evolutionarily rather new adaptive immune system, which can be found in jawed fish and higher vertebrates, needs several days to mount an efficient response upon its first encounter with a certain pathogen. As soon as antigen-specific lymphocyte clones have been expanded, they powerfully fight the pathogen. Importantly, memory lymphocytes can often protect us from reinfections. During the development of T and B lymphocytes, many millions of different receptors are generated by somatic recombination and hypermutation of gene segments making up the antigen receptors. This process carries the inherent risk of autoimmunity, causing most inflammatory rheumatic diseases. In contrast, inadequate activation of the innate immune system, especially activation of the inflammasomes, may cause autoinflammatory syndromes.
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Brooker, Paul, and Margaret Hayward. GM: Sloan’s My Years With General Motors. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198825395.003.0002.
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Sloan’s classic management-text memoir and more recent sources reveal his use of all six rational methods during his 1920s enhancement of General Motors. The key methods were, first, his emphasis on innovative adaptation, which restructured General Motors into multiple operating divisions; second, his emphasis on strategically calculated marketing, which pioneered annual model changes, automobile styling, and style-based advertising; third, his emphasizing of institutionalized deliberation through a multi-tiered committee system to enhance policy-making. CEO Sloan’s use of these rational methods resulted in General Motors becoming the world’s largest industrial corporation, with more than half a million employees, and having its methods copied by competitors. Finally, there is a description of the rivalry between his and Henry Ford’s corporations and approaches, resulting in Sloanism’s administrative rationality defeating Fordism’s focus on efficient production.
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Anderson, James A. After Digital. Oxford University Press, 2018. http://dx.doi.org/10.1093/acprof:oso/9780199357789.001.0001.
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We are surrounded by digital computers. They do many things well that humans do not and have transformed our lives. But all computers are not the same. Although digital computers dominate today’s world, alternative ways to “compute” might be better and more efficient than digital computation when mechanically performing those tasks, important to humans, that we think of as “cognition.” Cognition, after all, was originally developed to work with our own specific biological hardware. Digital computers require elaborate detailed instructions to work; they are flexible but not simple. Analog computers are designed to do specific tasks. They can be simple but not flexible. Hardware matters. The book discusses two classic kinds of computer, digital and analog, and gives examples of their history, functions, and limitations. The author suggest that when brain “hardware,” with its associated brain “software” work together, it could form a computer architecture that would be useful for the efficient performance of cognitive tasks. This book discusses the essentials of brain hardware—in particular, the cerebral cortex, where cognition lives—and how cortical structure can influence the form taken by the computational operations underlying cognition. Topics include association, understanding complex systems through analogy, formation of abstractions, and the biology of number and its use in arithmetic and mathematics. The author introduces novel “brain-like” control mechanisms: active associative search and traveling waves. There is discussion on computing across scales of organization from single neurons to brain regions containing millions of neurons.
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Woodburne, Michael O., Gregg F. Gunnell, and Richard K. Stucky. Land Mammal Faunas of North America Rise and Fall During the Early Eocene Climatic Optimum. Denver Museum of Nature & Science, 2009. http://dx.doi.org/10.55485/rkck3803.
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Climatic warming at the beginning of the Early Eocene Climatic Optimum (EECO) resulted in major increases in plant diversity and habitat complexity reflective of temporally unique, moist, paratropical conditions from about 53–50 Ma in the Western Interior of North America. In the early part of the EECO, mammalian faunal diversity increased at both local and continental scales in conjunction with a major increase in tropicality resulting from mean annual temperatures reaching 23 ̊C and mean annual precipitation approaching 150 cm/yr. A strong episode of taxonomic origination (high number of first appearances) in the latest Wasatchian and earliest Bridgerian Land Mammal Ages apparently was in response to these greatly diversified floral and habitat associations along with increasing temperature and precipitation. This is in contrast to a similar increase in first appearances at the beginning of the Wasatchian (Paleocene-Eocene Thermal Maximum, or PETM) that can be traced instead to climate-induced transcontinental immigration. In the later part of the EECO, from Br-1b–Br-3, climatic deterioration resulted in a major loss of faunal diversity at both continental and local levels, apparently mirroring climatic deterioration. Relative abundance shifted from diverse, evenly distributed communities to much less diverse, skewed distributions dominated by the condylarth Hyopsodus. Evolutionary innovation through the 53–50 Ma interval included a modest overall increase in body size and increased efficiency in carnivory and folivory as reflected by within-lineage patterns of evolution. Rather than being “optimum,” the EECO engendered the greatest episode of mammalian faunal turnover of the first 15 million years of the Cenozoic era, with both first and last appearances at their highest levels. Both the PETM and EECO faunas were climatically shaped.
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Sowada, Barbara J. A Call to Be Whole. Greenwood Publishing Group, Inc., 2003. http://dx.doi.org/10.5040/9798400622908.
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Examines the complex interrelationships that inform the health care system. Health care, like all social systems, is a product of thought. Up to now, our collective thinking has been based on trying to manage parts, not the whole. This book inquires into four age-old questions that shape all health care systems: What is health? What is care? Who is responsible? How much is enough? Americans have the wealthiest health care system in the world, yet the health status of Americans ranks in the lowest quartile among the world's 25 industrialized nations and 45 million Americans are without health insurance. Today's cost, quality, and access problems are inter-related and can be traced to taken-for-granted assumptions and health care's outmoded organizing concepts: reductionism and materialism. Greater fragmentation of care, an over-dependence on technology, inattention to social and environmental determinants of health, and serious economic and moral dilemmas are some of the results of the last 40 years of piecemeal political and economic reform. This book has three purposes. The first is to help the reader see healthcare as a complex system—a part in a larger whole—and to show how answers to the questions, What is health? What is care? Who is responsible? How much is enough? implicitly define the purpose, effectiveness, efficiency, and fairness of a health care system. The second is to show that today's access, cost, and quality problems are interrelated, and arise from outmoded concepts, unquestioned assumptions, and a long trail of inconsistent and contradictory answers to the four questions. The third purpose is to acquaint readers with both the personal and societal challenges of finding coherent answers to the four questions raised above and to describe some of the budding experimental solutions that challenge traditional conventions and assumptions.
Book chapters on the topic "Milling efficiency"
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Yuan, Xing, Yuqi Fan, Tao Ma, Shuting Wang, Xinyong Mao, and Lei Zhang. "Machining Efficiency Optimization in Flank Milling of Curved Thin-walled Workpieces with Target Machining Accuracy." In Lecture Notes in Mechanical Engineering. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-97-7887-4_32.
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Abstract Curved aluminium alloy thin-walled workpieces are an integral part of essential components in aerospace. Aggressive machining parameters can reduce the machined surface roughness and dimensional accuracy during flank milling for the thin-walled workpiece. However, conservative machining parameters can constrain the machining efficiency. To solve this issue, this article develops a machining parameter optimization method for curved thin-walled workpieces during flank milling. The method comprehensively considers the impact of time-varying deflection and material removal of curved thin-walled workpieces during the flank milling and further analyses the influence of machining parameters on machining surface roughness and dimensional accuracy. The optimized processing parameters can maximize the processing efficiency for curved thin-walled workpiece to satisfy the processing dimensional precision and surface roughness.
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Kundrák, János, Viktor Molnár, Tamás Makkai, and Tamás Dági. "Analysis of Material Removal Efficiency in Face Milling of Aluminum Alloy." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-16943-5_34.
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Gross, Daniel, Miriam Eichinger, Jan Harald Selzam, and Nico Hanenkamp. "Initial Study on Milling in an Ultrasonically Excited Metalworking Fluid Bath." In Lecture Notes in Mechanical Engineering. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-77429-4_70.
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AbstractEnergy and resource efficiency are seen as key drivers of the industrial transformation towards a low carbon economy. In particular, machine tools, which are essential to value creation, have a significant share of industrial greenhouse gas emissions due to their high-energy consumption. The energy demand for the provision and supply of metalworking fluids (MWF) alone can account for up to 25% of the total energy demand. The aim of this study is to investigate and fundamentally design an alternative cooling lubricant concept. This concept does not require continuous pumping of the coolant supply. Instead, the milling operation takes place in an immersion bath filled with metalworking fluid. An additional ultrasonic (US) actuator causes the coolant to vibrate, allowing the coolant to penetrate deeper into the cutting zone. The machining tests include a comparison of classic flood cooling, immersion bath milling and immersion bath milling with US stimulation. To compare the processes, the flank wear, the workpiece surface roughness and the bending moments due to the cutting forces were analyzed. The energy assessment allows a final evaluation of the processes.
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Kostyuk, Gennadiy, Viktor Popov, Yurii Shyrokyi, and Hanna Yevsieienkova. "Efficiency and Performance of Milling Using Cutting Tools with Plates of a New Class." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-68014-5_58.
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Kesarwani, Shivi, Prakhar Kumar Kharwar, and Rajesh Kumar Verma. "Artificial Neural Network (ANN) for Parametric Appraisal and Milling Efficiency Evaluation of Carbon/Epoxy Nanocomposites." In Advances in Simulation, Product Design and Development. Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-4556-4_14.
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Can, Alperen, Hendrik Schulz, Ali El-Rahhal, Gregor Thiele, and Jörg Krüger. "A Practical Approach to Realize a Closed Loop Energy Demand Optimization of Milling Machine Tools in Series Production." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-28839-5_56.
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AbstractEnergy efficiency is becoming increasingly important for industry. Many approaches for energy efficiency improvements lead to the purchase of new hardware, which could neglect the sustainability. Therefore, optimizing the energy demand of existing machine tools (MT) is a promising approach. Nowadays energy demand optimization of MT in series production is mainly done manually by the operators, based on implicit knowledge gained by experience. This involves manual checks to ensure that production targets like product quality or cycle time are met. With data analytics it is possible to check these production targets autonomously, which allows optimizing production systems data driven. This paper presents the approach and evaluation of a closed loop energy demand optimization of auxiliary units for milling MT during series production. The approach includes, inter alia, a concept for machine connectivity using edge devices and a concept for validating production targets.
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Kane, M. M. "Improving the Efficiency of Gear Milling of Cylindrical Gears with Worm Cutters When Using Pulse Feed." In Gears in Design, Production and Education. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-73022-2_20.
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Díaz-Plaza De Los Reyes, Nicolás, Ricardo Alzugaray-Franz, Erardo Leal-Muñoz, Iván La Fé-Perdomo, Jorge Ramos-Grez, and Eduardo Diez-Cifuentes. "Influence of Material Properties in Milling Forces of AISI 316L Obtained by L-PBF." In Proceedings of the XV Ibero-American Congress of Mechanical Engineering. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-38563-6_46.
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AbstractTechnologies associated with additive manufacturing enabled the realization of several new products, providing high flexibility to the processes and high material usage efficiency. Furthermore, additively manufactured metals exhibit differences in surface topography and mechanical properties, primarily due to changes in the printing strategies and production parameters. Nowadays, postprocessing techniques are necessary to produce a quality printed metal product, due to the high initial surface roughness that every additive specimen presents. In this study, milling tests of additively manufactured AISI 316L workpieces obtained under different conditions were performed to investigate the influence of printing volumetric energy density, material density, and material ultimate tensile strength on cutting forces. The analysis revealed an association between cutting forces amplitude and the analyzed material properties. Also, similar machinability between the printed and the hot rolled metal was found when the density of the material was similar.
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Aridome, Yoshiaki. "Improving the Labour Efficiency of a Partially Automated Warehouse: A Case Study from the Flour Milling Industry." In Achieving Competitive Edge Getting Ahead Through Technology and People. Springer London, 1991. http://dx.doi.org/10.1007/978-1-4471-1904-3_64.
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Fickert, Axel, Hajo Wiemer, Carola Gißke, and Lars Penter. "Measuring Thermally Induced Tool Center Point Displacements on Milling Machines Using a Test Workpiece." In Lecture Notes in Production Engineering. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-34486-2_25.
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AbstractThe Collaborative Research Centre (CRC) “Transregio 96” focuses on the thermo-elastic behaviour of machine tools and the development of solutions, that aim at reducing thermally induced manufacturing errors. Various compensation and correction solutions were developed. To verify the efficiency of those solutions, a measuring technique involving a test work piece (TWP) and defined load cases were developed. The load cases are given in the form of NC-programs to create thermal loads on a machine tool by moving its feed axes on a pre-defined route, rotating the main spindle at pre-defined speeds or letting the machine tool rest for a pre-defined period of time. The TWP was used to capture the resulting thermally induced displacements of the tool center point (TCP).In this publication the TWP and the two load cases are described. And the test procedure itself, as well as experimental data to validate the results are presented. The described approach has the potential to be a cost effective way for measuring thermally induced errors of machine tools. It allows for a simple and time saving experimental setup and is easy to apply on, and compare the results between multiple machine tools. Furthermore, the presented method of determining thermally induced displacements of a machine tool’s TCP will be compared to other commonly used direct or indirect measurement techniques, showing its benefits, drawbacks and limitations.
Conference papers on the topic "Milling efficiency"
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Huang, Hong-Wei, Meng-Shiun Tsai, Ming-Tsung Lin, Mao-Qi Hong, Teng-Yi Huang, and Shin-Sheng Yang. "Robust feedrate control for high efficiency milling process." In 2017 IEEE International Conference on Advanced Intelligent Mechatronics (AIM). IEEE, 2017. http://dx.doi.org/10.1109/aim.2017.8014128.
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Schulz, H. "Efficiency and Accuracy of Linear Motor Driven Milling Machine." In Aerospace Manufacturing Technology Conference & Exposition. SAE International, 1998. http://dx.doi.org/10.4271/981859.
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Hong, Hui, Chaoyong Zhang, Leilei Meng, Guangdong Tian, and Jun Yu. "Characterising energy efficiency in maching processes: A milling case." In 2017 International Conference on Advanced Mechatronic Systems (ICAMechS). IEEE, 2017. http://dx.doi.org/10.1109/icamechs.2017.8316555.
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Xin Yuan, Takanori Yazawa, Nobutoshi Baba, Yukio Maeda, Yasuhiko Ougiya, and Tatsuhiro Kojima. "Study on high efficiency milling of steam turbine blade." In 2012 International Conference on Renewable Energy Research and Applications (ICRERA). IEEE, 2012. http://dx.doi.org/10.1109/icrera.2012.6477389.
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Farhan, Muhamed, Ahmed Elqousy, Andika Sulaiman, et al. "Precision Milling Solutions: Enhancing Well Accessibility with Robotic E-Line Milling Technology." In SPE/IADC Middle East Drilling Technology Conference and Exhibition. SPE, 2025. https://doi.org/10.2118/225760-ms.
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Abstract Objectives/Scope The primary objective of this operation was to resolve a downhole obstruction in an oil well by milling and enlarging a 2.75-inch nipple, to enhance accessibility and enable the retrieval of a fish stuck below the nipple. This intervention aimed to showcase the effectiveness of advanced robotic e-line milling technology in challenging well conditions. This paper will detail the methodology employed during the milling operation, including the tools and techniques used, and the key lessons learned from the intervention. Methods, Procedures, Process The operation employed a combination of a hydraulic stroking tool, an e-line tractor, and a robotic e-line milling tool equipped with a custom-designed bit. Extensive pre-job testing was conducted to determine optimal milling parameters, including weight on bit (WOB), current signature, and estimated milling duration. The toolstring was deployed in multiple runs, with real-time data guiding adjustments to milling parameters. Pre- and post-milling verification runs using slickline confirmed the effectiveness of the intervention. Results, Observations, Conclusions The nipple was successfully enlarged from 2.75 in. to 2.86 in. inner diameter (ID). The operation required continuous adjustment of WOB based on real-time feedback from the e-line milling tool, ensuring efficient and effective milling. The inclusion of the hydraulic stroking tool proved critical in mitigating stuck-tool scenarios, ensuring safe and efficient operations. The intervention enhanced well access, confirmed by slickline verification runs, enabling the operator to proceed with the fishing operation. This approach eliminated the need for coiled tubing (CT) and heavy-duty surface equipment, minimizing risks, reducing costs, and leaving only fine debris downhole. Novel/Additive Information This operation demonstrates the efficiency and precision of electric-line milling technology for resolving downhole restrictions. It underscores the adaptability of this solution in complex well scenarios, offering a safer, more cost-effective alternative to traditional methods while maintaining high standards of operational performance.
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Qiao, Yang, Xing Ai, Zhanqiang Liu, and Jun Zhao. "Experimental Research in High Efficiency Milling of Powder Metallurgy Superalloy." In 2010 International Conference on Measuring Technology and Mechatronics Automation (ICMTMA 2010). IEEE, 2010. http://dx.doi.org/10.1109/icmtma.2010.93.
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Liu, Zhuo, Ning Liu, Kaining Shi, Biyao Qiang, Miaolong Yuan, and Shanshan Yang. "An Experimental Investigation into Anisotropic Energy Efficiency of Milling Process." In International Conference of Asian Society for Precision Engineering and Nanotechnology. Research Publishing Services, 2022. http://dx.doi.org/10.3850/978-981-18-6021-8_or-06-0308.html.
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Cai, Yun, and Hua Shao. "Energy Efficiency State Identification in Milling Processing Based on Improved HMM." In ASME 2017 12th International Manufacturing Science and Engineering Conference collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/msec2017-2735.
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Energy efficiency state identification of milling process plays an important role in energy saving efforts for manufacturing systems. However, it is very difficult to track energy efficiency state in machining processes based on traditional signal processing strategies due to the fact that energy state is usually coupled with a lot of factors like machine tool states, tool conditions, and cutting conditions. An identification method of information reasoning and Hidden Markov model (HMM) for energy efficiency state is proposed in this paper. Utilizing cutting conditions, empirical models of the energy efficiency, experimental data and signal features, an expert system is established for initial probability optimization and the state is further identified by HMM. The experiments show that energy efficiency state can be identified with this method.
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Yew Jin Tan, Nicholas, Rui Huang, Dennis Wee Keong Neo, and Kui Liu. "Generation of Micro Lenslet Arrays using High Efficiency Synchronized Diamond Milling." In International Conference of Asian Society for Precision Engineering and Nanotechnology. Research Publishing Services, 2022. http://dx.doi.org/10.3850/978-981-18-6021-8_or-12-0064.html.
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Bacon, Richard M. "New Cost Effective Milling Technologies for Manufacturing Blisks." In ASME Turbo Expo 2000: Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/2000-gt-0341.
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Many of the new designs for both military and civil aircraft engines are replacing single bladed rotor assemblies with blisk assembled rotors because of the efficiency and performance benefits. Blisks are usually manufactured from hard exotic materials which means that they can be difficult to manufacture and their cycles times can be long and subsequently the components become very expensive. In order to make them more affordable to engine designers and manufacturers alternative, more efficient methods of manufacturing have been developed to help reduce their cost. This paper outlines some of the developments that have been achieved in the milling of blisks so as to make them more commercially available.
Reports on the topic "Milling efficiency"
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Galitsky, Christina, Ernst Worrell, and Michael Ruth. Energy efficiency improvement and cost saving opportunities for the Corn Wet Milling Industry: An ENERGY STAR Guide for Energy and Plant Managers. Office of Scientific and Technical Information (OSTI), 2003. http://dx.doi.org/10.2172/816536.
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Bancalari, Antonella, Pedro Bernal, Pablo Celhay, Sebastian Martinez, and María Deni Sánchez. An Ounce of Prevention for a Pound of Cure: Basic Health Care and Efficiency in Health Systems. Inter-American Development Bank, 2024. http://dx.doi.org/10.18235/0005669.
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We examine the efficiency gains in health systems generated after the national roll out of basic healthcare in El Salvador between 2010 and 2013. Using data from over 120 million consultations and five million hospitalizations, we demonstrate that the expansion of community health teams, comprising less-specialized health workers, increases preventive care and decreases curative care and preventable hospitalizations. We also estimate coverage improvements for previously unattended chronic conditions amenable to effective primary care. These results suggest that decentralization of tasks to less-specialized health workers improves efficiency, maintaining quality of care.
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Wakoli, Martha, Nyamolo Abagi, Kiplabat Tarus, and Shalom Mulinge. Leave No One Behind: Bridging the Energy Access Gap with Innovative Off-Grid Solar Solutions. Efficiency for Access, 2024. https://doi.org/10.70098/ewrx1506.
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This Efficiency for Access research spotlights the gap in access to life-changing, off-grid solar appliances for millions worldwide. The report highlights the opportunity and steps that governments, entrepreneurs, investors, and other stakeholders have to accelerate sector growth, and the potential business opportunities that can come from this.
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Haddad, J., L. A. Horta Nogueira, Germano Lambert-Torres, and L. E. Borges da Silva. Energy Efficiency and Smart Grids for Low Carbon and Green Growth in Brazil: Knowledge Sharing Forum on Development Experiences: Comparative Experiences of Korea and Latin America and the Caribbean. Inter-American Development Bank, 2015. http://dx.doi.org/10.18235/0007001.
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The Brazilian continental dimensions and diversified natural resources are proportional to the challenges to develop its infrastructure sustainably and supply proper public services to more than 200 million inhabitants. Energy consumption has doubled since 1990, fostered by economic growth and the expansion of middle class. In this context, promote energy efficiency, in a broad sense, is urgent and rational. Brazil has a relatively long history in promoting energy efficiency at final user level. A landmark of this process is the Brazilian Labeling Program, launched in 1984, as direct consequence of high prices of energy at that time. This program was coordinated by the National Institute of Metrology, Standardization and Industrial Quality, which sets standards for evaluation, ranks the performance of energy equipment and imposes a classificatory labeling to inform consumers, with a label similar to other countries. The National Electricity Conservation Program was created in 1985 by MME and is executed by ELETROBRÁS. The energy saving induced by this program in 2013 is equivalent to 2.1% of the total electric energy consumption in the period, corresponding to the annual energy consumption of about 5 million Brazilian households. In 2001, Federal Law 10,295, also known as the Energy Efficiency Law, was approved to reinforce those energy efficiency programs, allowing the Brazilian government to establish Minimum Energy Performance Standards for appliances and energy equipment, prohibiting the commercialization of low efficiency models and promoting the progressive withdrawal of low-efficiency models. According to the National Energy Plan 2030, up to 15.5 GW of electricity generation could be saved as a result of energy efficiency in the next 20 years. The Smart Grids, adopting modern technologies in electricity distribution has been proposed in Brazil improve the quality provided in the low voltage service, reduce losses, and reduce operating costs, among others. Several regulations related to this subject, dealing with grid connection for distributed small-scale generation, the establishment of the 'hourly tariff', with the regulation of the use of PLC; and with the compulsory use of Geographic Information System. Currently, dozens pilot projects on Smart Grids are underway in the country. Two projects are presented in detail: CEMIG and AES Eletropaulo, two Brazilian power utilities.
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Dunn, Jessica, Don Anair, David Reichmuth, and Kevin Shen. Making the Most of Electric Vehicle Batteries: How recycling, innovation, and efficiency can support a sustainable transportation future. Union of Concerned Scientists, 2024. http://dx.doi.org/10.47923/2024.15617.
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Electrifying the US transportation system is essential to rapidly decarbonizing the economy and reducing the public health costs from tailpipe emissions. Electric vehicles (EVs) powered by lithium-ion batteries have become the most preferred alternative to gasoline vehicles. We can create a more resilient, just, and sustainable EV supply chain and energy future by minimizing mineral needs to electrify and eventually relying mostly on recycled materials. This research quantifies the potential to minimize mineral demand for light-duty transportation while electrifying using several strategies, including battery recycling, improved vehicle efficiency, right-sizing vehicle range, technological innovation, and increasing mobility options. The results demonstrate that with smart policies, investments, and industry leadership, we can reduce newly mined lithium needs by nearly half (48%) from 2025 to 2050. This amounts to 1.5 million tons, equivalent to 180 million typically-sized EV batteries.
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Boisson, Pierre-Marie. The Société Générale Haitïenne de Solidarité (SOGESOL) Case. Inter-American Development Bank, 2007. http://dx.doi.org/10.18235/0006777.
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This presentation features the case of the Société Générale Haitïenne de Solidarité (SOGESOL) which is a non-Bank Financial Institution whose Institutional mission is to promote Haitian micro-entrepreneurship, to adapt traditional banking services to the micro-entrepreneurs needs, to satisfy the clientele while respecting efficiency and rentability standards. Sogesol has served 23,000 clients with US$50 million disbursed since it was established in August 2000 by its parent company Sogebank, which received IDB grants in 1999.
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Ekka, Rashmi Kiran, Anita Campion, and Mark D. Wenner. Interest Rates and Implications for Microfinance in Latin America and the Caribbean. Inter-American Development Bank, 2010. http://dx.doi.org/10.18235/0012207.
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Microfinance institutions (MFIs) have been successful in providing credit to millions of low-income borrowers in groups previously excluded from formal financial services, but they often charge interest rates that many claim are excessive. We examine microfinance interest rates and their determinants in order to understand how these rates might be lowered. Using high-quality financial data from 29 institutions in seven countries over a period of four years, and drawing on information from field visits with clients, we explore patterns of cost and efficiency in MFIs. We find that improved operational efficiency comes with increased competition and institutional age, or learning by doing. Encouragingly, our regression analysis shows patterns of profit-making MFIs charging lower interest rates. We also find that interest rate caps reduce the outreach of these institutions to the poor, women, and rural clients.
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Sopori, Bhushan. Application of Vacancy Injection Gettering to Improve Efficiency of Solar Cells Produced by Millinet Solar: Cooperative Research and Development Final Report, CRADA Number CRD-10-417. Office of Scientific and Technical Information (OSTI), 2012. http://dx.doi.org/10.2172/1051916.
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Raja, Rameez Ali, Vidushi Toshniwal, and Rodrigo Salgado. GIS-Based Geotechnical Database for Collaborative GIS. Purdue University, 2023. http://dx.doi.org/10.5703/1288284317637.
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INDOT spends at least 8 million dollars annually on geotechnical site investigations, not including the amounts spent by contractors. The laborious and costly job of data collection in geotechnical practice requires the efficient storing and organizing of this valuable data to develop correlations and trends in spatially varying geotechnical data. INDOT currently uses gINT software for managing geotechnical data and ArcGIS for storing boring logs and geotechnical reports. The INDOT geotechnical office is pursuing means to improve the efficiency of their operations by developing a GIS-based geotechnical database for secure storage, easy retrieval, and flexible sharing of geotechnical data to enhance decision making. SPR-4616 is the first step towards the development of a geotechnical data management system in which important decisions on the components and structure of the database were made. The report presents a detailed conceptual layout for the development of a geotechnical database following an object-oriented programming approach. The report discusses in detail the geotechnical applications, the field, laboratory, and verification tests that will be included in the database. The geotechnical variables required to perform the engineering analysis in designing specific applications are logically linked with the geotechnical tests from which they are obtained. Lastly, a detailed layout of the proposed database structure and a user workflow example is provided in the report and can serve as a guide during the development of the database system.
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Salmeri, Micol, Richard Rugg, Paul Wedgwood, and Roberto Gabriel Aiello. Developing Clean Energy Solutions in Latin America’s Major Cities: An Introduction for Subnational Energy Policy Decision-Makers. Inter-American Development Bank, 2017. http://dx.doi.org/10.18235/0006480.
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This publication is intended to help sub-national energy policy decision-makers of major Latin American cities as they look to develop and implement clean energy solutions. Our aim is to help local actors to understand, plan and execute initiatives successfully which, over time, will: save money, while increasing energy security, increase standards of living and the supply of more efficient and sustainable energy solutions, and reduce the overall use of energy and greenhouse gas emissions. While each city has its own individual circumstances, many common challenges are faced by major cities which can prevent the uptake of opportunities for improved energy management, energy efficiency and innovation in their energy systems. Due to the sheer size and complexity of large and megacities such challenges are typically exacerbated; yet the scale of the opportunities and related potential benefits are also much more significant. Clean energy solutions have delivered substantial benefits to millions of citizens and thousands of businesses and civic institutions, providing material positive social, economic and environmental impacts. Latin America is one of the world’s most urbanised regions, with over 80 percent of its population living in cities. The region is currently home to five megacities (Buenos Aires, Lima, Mexico City, Rio de Janeiro and São Paolo). It is anticipated that by 2050 over 86 percent of Latin America’s population will live in urban areas.