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Dissertations / Theses on the topic 'Spindle head'

Author: Grafiati

Published: 28 June 2021

Last updated: 29 July 2025

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1

Srněnský, Jan. "Návrh systému automatické výměny vřetenových hlav." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318528.

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The purpose of this thesis is to design system for automatic exchange of spindle heads shared by several machines. Spindle heads are transported between these machines and placed to the position for exchange. The system also allows storing of heads. Requirements for system are load capacity of 2 000 kg and placing a spindle head to the exchange position with precision of ± 0,02 mm. The thesis consists of three parts. The first part involves search of head exchange principles and shows possible ways to transport heads and other elements that could be used in the system. In the next part are sev

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2

Vazovan, Ľubomír. "Vřeteník a naklápěcí hlava frézovacího multifunkčního obráběcího centra s vodorovnou osou vřetena." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-402637.

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The thesis contains of draft, calculations, CAD model and drawing documentation of the moltifunctional machining center with horizontal axis of spindle. This thesis is one of the four parts with which connection ensue the machine-tool. In the first part of my work, there is a constructional draft of the headstock which will enable milling, turning and drilling. In the introduction of this part is headstock research which is solving the most important parts of the headstock of machine . Consequently, technical calculations are acoomplished. Based on these calculations, a specific constructional

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3

Sovadina, František. "Návrh vřeteníku soustruhu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443734.

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The thesis deals with the design and construction of headstocks of a turning centre. The aim is to design a spindle with an output of 20 kW and a maximum speed of 5000 1/min. The research part of the thesis is focused on the description of the basic parameters of the headstock and turning centres needed for the construction of the headstock and contains an analysis of the available spindles on the market. The next part of the thesis deals with the selection and calculation of cutting conditions and the necessary parameters. Analytical calculations are then verified using FEM analysis. At the e

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4

Vyplašil, Jan. "Návrh horizontální výměnné hlavy - VA1 –C." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229757.

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Diploma thesis deals with the concept of interchangeable straight spindle head type VA1-C, used for automatic clamping in 80 kW spindle head from production of TOS Kuřim. Thesis contains survey of interchangeable heads, analysis of the spindle housing, strenght analysis of the spindle with the safety calculations in critical sec-tions and analysis of the clamping mechanism together with the calculation of the camping force, which holds the tools in the spindle. Analysis of the camping mechanisms contains calculation of the contact stress between balls and housings. All results are shown in the

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5

Nedbal, David. "Návrh manuální pravoúhlé frézovací hlavy určené pro technologické operace na středně těžkých obrobcích." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382413.

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This thesis deals with mechanical design of right-angle manual milling head for headstock of horizontal boring machine of Fermat production. The thesis includes research of milling head types, Fermat production heads, but also heads of competition companies with similar parameters like designed head. Design part of thesis is about describing used components of chosen solution. The thesis includes also technical report describing calculation of load spectrum from machining, design of gears, calculation of reactions in spindle bearings, spindle deformation and control of spindle bearings. The en

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6

Svoboda, Ondřej. "Konstrukce pravoúhle prodloužené frézovací hlavy pro horizontální vyvrtávačku." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231164.

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This thesis deals with design of right-angled elongated milling head for horizontal boring machine of FERMAT production. The thesis includes a detailed research of milling heads, a description of the head´s basic components and certain commercially available head´s comparison. Design part is describe components description and the design. Calculations are focused on determinating of forces generated during machining, setting of loading spectrum and the power load calculating individual gears during machining. In the next part is calculation of the reactions in the spindle bearings included, th

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7

Tocháček, Jakub. "Návrh zrychlovací hlavy pro vřeteník horizontální vyvrtávačky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241857.

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This thesis deals with conceptual design of spindle speeder head for headstock of horizontal boring machine of FERMAT Company. The thesis includes research part, which is initially given to horizontal boring machines and their accessories and continues with an overview and comparison of spindle speeders that are currently on the market. The work includes technical report, which is aimed on design of the belt drive including the idler pulley. Design of belt drive is based on the output of the calculation program developed by manufacturer of synchronous belts. Calculation part, mainly focused on

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8

Raszka, Pavel. "Vývoj vřeteníku pro horizontální vyvrtávací centrum." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401042.

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The master´s thesis deals with the design of the headstock for the horizontal boring center and design of the milling head. In the first part of the thesis, a search is made in the field of boring machines, main parts of boring machine headstock and milling heads. Based on this theoretical analysis, the input parameters for the calculation of the tension, power and torque characteristics of the headstock are selected. Subsequently, the design of the headstock and milling head is done using a 3D model.

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9

Ryšavý, Radek. "Návrh obrábění součásti včetně její montáže." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-402502.

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This diploma thesis is focused on piece production of the component and its subsequent assembly. It is an interchangeable spindle head marked VA1 from the product portfolio of TOS KUŘIM - OS, a.s. The aims of the diploma thesis include the characteristics of the assigned component, the subsequent analysis of the current manufacturing and assembly process. In the price calculations chapter, the direct and indirect input costs for the part production are quantified. Proposals to improve production were presented to the company and offered for possible implementation.

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10

Matěja, Josef. "Konstrukce multifunkčního obráběcího centra." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230916.

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The Diploma thesis deals with the design solution of multi-functional machining centre, especially with one of its parts – the design of the slide ram and vertical feed incl. the choice of convenient tool heads for the slide ram. The introducing part deals with the numerically controlled machines and centres generally, especially with the portal-type ones. It contains description of individual machine parts including examples of accessories from product plans of domestic and foreign producers. The second part of the Diploma thesis contains calculations and design solution of the slide ram and

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11

Horák, Vítězslav. "Konstrukce frézovací hlavy pro CNC soustruh s nastavitelným sklonem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417456.

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This thesis deals with design of CNC lathe milling head with B axis. Thesis includes research in CNC turning machines, their tool systems and overview of manufacturers of milling B axis. It also includes calculation of machining forces, design of spindle and design of B axis including necessary calculations. Part of this thesis is also 3D model and assembly drawing, 2 manufacturing drawings and list of items.

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12

Leden, Pavel. "Výroba tělesa pro klíčový zámek." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229935.

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The diploma thesis is focused on the production of body for cylinder locks. This is production of very small and accurate parts. In the first part there is described the function of the lock, the sort of cylinder locks, their components and the basic types of safety elements. The second part is focused on the production of given type of body. The thesis deals with either existing production technology or proposals of possible innovation. This firstly consists in new organization of manufacturing operations. At the close we can find comparison of existing technology and new proposal.

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13

Wells, Allan R. "Spectral analysis of multi-spindle machining heads /." Online version of thesis, 1994. http://hdl.handle.net/1850/12019.

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14

Карпусь, В. Є., Віталій Олександрович Іванов, Виталий Александрович Иванов, Vitalii Oleksandrovych Ivanov та О. В. Котляр. "Дослідження точності переналагоджуваної технологічної оснастки для багатономенклатурного виробництва". Thesis, ДонНТУ, 2012. http://essuir.sumdu.edu.ua/handle/123456789/42760.

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Розглянуто шляхи інтенсифікації технологічних процесів за рахунок використання переналагоджуваної технологічної оснастки. Доведено доцільність застосування переналагоджуваної технологічної оснастки на основі точності обробки. Виконаний аналіз точності базування валів у переналагоджуваній базуючій призмі. Визначені значення відведення свердел при обробці отворів багатошпиндельною головкою для токарних верстатів.<br>Рассмотрены пути интенсификации технологических процессов за счет использования переналаживаемой технологической оснастки. Доказана целесообразность применения переналаживаемой техно

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15

Aurand, Alexander M. "Dynamic Moments on the Cervical Spine Imposed by Head-Mounted Equipment." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1430747355.

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16

Leisti, E. L. (Eeva-Liisa). "Radiologic findings of the head and spine in neurofibromatosis 1 (NF1) in Northern Finland." Doctoral thesis, University of Oulu, 2003. http://urn.fi/urn:isbn:9514271394.

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Abstract Imaging of the head and spine with CT and/or MRI was performed on 125 Northern Finnish NF1 patients to evaluate the CNS lesions in patients of different ages and their role in diagnosis and follow-up. Manifestations of NF1 in the head were more common in children than in adults. 77% of the children and 33% of the adults had T2 hyperintense brain lesions. Optic gliomas were present in 29% of the patients, in 44% of the children and 10 % of the adults. 8% of the patients had other intracranial tumours . Spinal lesions were seen in 75% of the patients. Hyperintense T2 lesions were mos

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Lopik, David van. "A computational model of the human head and cervical spine for dynamic impact simulation." Thesis, Loughborough University, 2004. https://dspace.lboro.ac.uk/2134/7643.

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Injury to the human neck is a frequent consequence of automobile accidents and has been a significant public health problem for many years. The term `whiplash' has been used to describe these injuries in which the sudden differential movement between the head and torso leads to abnormal motions within the neck causing damage to its soft tissue components. Although many different theories have been proposed, no definitive answer on the cause of `whiplash' injury has yet been established and the exact mechanisms of injury remain unclear. Biomechanical research is ongoing in the field of impact a

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18

Gass, Elizabeth. "Physiological Responses and Their Regulation During Exercise and Heat Stress in Individuals with Traumatic Spinal cord Injury." Thesis, Griffith University, 1999. http://hdl.handle.net/10072/366416.

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This submission demonstrates the unique contribution made by my research to our understanding of physiological responses and their regulation during exercise and heat stress in individuals with traumatic spinal cord injury, and thus that I have met the conditions required for the award of PhD by Publication.<br>Thesis (PhD Doctorate)<br>Doctor of Philosophy by Publication (PhD)<br>School of Physiotherapy and Exercise Science<br>Griffith Health<br>Full Text

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19

Saavedra, Sandra Lee 1952. "Contribution of spinal segments to control of posture during typical and atypical development." Thesis, University of Oregon, 2010. http://hdl.handle.net/1794/10530.

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xviii, 125p. : ill. (some col.) A print copy of this thesis is available through the UO Libraries. Search the library catalog for the location and call number.<br>Trunk control is critical for all functional movement, yet little is known about the development of trunk stability. Previous research considered the trunk to be one rigid segment ignoring the complexity of multiple spinal segments. In healthy adults spinal control is so well orchestrated that this assumption is reasonable; however during development and more specifically in pathological conditions in which spinal control is immatur

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Perez, Richard. "The Canadian C-Spine Rule and CT-Head Rule Implementation Studies: A Psychological Process Evaluation." Thesis, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/19814.

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The Canadian C-Spine (CS) and CT-Head (CT) Rules are tools aimed at improving the accuracy and efficiency of radiography use in emergency departments. This study evaluated whether the Theory of Planned Behaviour (TPB) could explain the inconsistent results from implementation studies of these two rules at 12 Canadian hospitals, where the same intervention resulted in a significant reduction in CS radiography but not CT radiography. It was demonstrated that the TPB model’s proposed relationships between constructs and behaviour could explain the ordering of CS but not CT radiography. However

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21

Bartsch, Adam Jesse. "Biomechanical Engineering Analyses of Head and Spine Impact Injury Risk via Experimentation and Computational Simulation." Case Western Reserve University School of Graduate Studies / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=case1291318455.

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22

Hollingworth, William. "Magnetic resonance imaging of the head, spine and knee : diagnosis, treatment and patients' quality of life." Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624732.

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23

Pavlova, Elena. "Vestibular control of body orientation in lamprey /." Stockholm, 2004. http://diss.kib.ki.se/2004/91-7349-861-0/.

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Muthuswamy, Sivaramakrishnan. "The Arabidopsis nucleoporin NUA is involved in mRNA export and functionally interacts with spindle assembly checkpoint proteins." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1262122134.

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Pew, Jefferson W. "A Torque Based Power Input Model for Friction Stir Welding." BYU ScholarsArchive, 2006. https://scholarsarchive.byu.edu/etd/1100.

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For decades models have been developed for predicting the size of the weld nugget and heat affected zones in fusion welded structures. The basis for these models is the welding heat input, which is fairly well understood for most arc welding processes. However, this traditional approach is not as straightforward for Friction Stir Welding (FSW). To date, there is no definitive relationship to quantify the heat input for FSW. An important step to establish a heat input model is to identify how FSW process parameters affect weld power. This study details the relationship between FSW process param

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Lovett, Mathew. "Quantitative Assessment of HSP70, IL-1ß and TNF-a in Spinal Fluid and Spinal Cord Sections of Dogs with Histopathologically Confirmed Degenerative Myelopathy and Control Dogs." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366561072.

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Williams, Matthew R. "Evaluation of 2D and 3D Command Sources for Individuals with High Tetraplegia." Cleveland, Ohio : Case Western Reserve University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=case1238682202.

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Thesis (Ph.D.)--Case Western Reserve University, 2009<br>Abstract Title from OhioLINK abstract screen (viewed on 13 April 2009) Department of Biomedical Engineering Available online via the OhioLINK ETD Center

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28

Grip, Helena. "Biomechanical assessment of head and neck movements in neck pain using 3D movement analysis." Doctoral thesis, Umeå : Umeå University, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1600.

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Kang, Yun Seok. "Evaluation of Biofidelity of Anthropomorphic Test Devices and Investigation of Cervical Spine Injury in Rear Impacts: Head-Neck Kinematics and Kinetics of Post Mortem Human Subjects." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1313554843.

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Іванюк, О. В. "Щодо процесів формування кольору в синьо-зелених шпінельних структурах". Thesis, Cумський державний університет, 2016. http://essuir.sumdu.edu.ua/handle/123456789/46475.

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На цей час виробництво суттєвої частки термотривких фарб грунтується, як правило, на неорганічних жаростійких пігментах, отриманих при спіканні оксидів металів або їх солей за реакціями шпінелеутворення у твердих фазах. Найбільшу групу елементів, сполуки яких використовуються як вихідна сировина для синтезу пігментів для високотемпературних барвників, утворюють елементи перехідних груп. Своїми пігментними якостями вони зобовязані специфічному заповненню електроних d- оболонок зовнішнього шару.

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Berner, Dagmar. "Der Einfluss der Kopf-Hals-Haltung auf die röntgenologische Darstellung der Hals- und Brustwirbelsäule des Pferdes." Doctoral thesis, Universitätsbibliothek Leipzig, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-114412.

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Pathologische Veränderungen der Wirbelsäule können zur Verkleinerung der Foramina intervertebralia der Halswirbelsäule sowie zur Verkürzung der Abstände zwischen den Dornfortsätzen der Brustwirbelsäule führen. Eine Veränderung der Kopf-Hals-Haltung kann ebenfalls die Dimension der Foramina intervertebralia sowie die Abstände zwischen den Dornfortsätzen beeinflussen. Die Bestimmung des Einflusses der Kopf-Hals-Haltung auf die genannten Parameter bei der radiologischen Darstellung der Wirbelsäule war deshalb das Ziel der vorliegenden Arbeit. In drei unterschiedlichen Kopf-Hals-Haltungen wurde di

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Stammen, Jason Anthony. "Biomechanical Characterization of the Human Upper Thoracic Spine – Pectoral Girdle (UTS-PG) System: Anthropometry, Dynamic Properties, and Kinematic Response Criteria for Adult and Child ATDs." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1344880193.

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McBride, Stanford Wayne. "A Numerical Model of the Friction Stir Plunge." BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/1772.

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A Lagrangian finite-element model of the plunge phase of the friction stir welding process was developed to better understand the plunge. The effects of both modeling and experimental parameters were explored. Experimental friction stir plunges were made in AA 7075-T6 at a plunge rate of 0.724 mm/s with spindle speeds ranging from 400 to 800 rpm. Comparable plunges were modeled in Forge2005. Various simulation parameters were explored to assess the effect on temperature prediction. These included the heat transfer coefficient between the tool and workpiece (from 0 to 2000 W/m-K), mesh size (no

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Nasim, Mohammed. "Neck protection development and a proposal of the associated standard for the motorcyclists." Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3426339.

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Motorcyclists (including moped riders) are the most vulnerable road users in terms of injury protection. Though the head and the extremities are the most affected body parts in motorcycle accidents, the occurrence of serious to fatal injuries is often due to the injuries in the cervical spine according to the literature. Although a variety of neck braces exists in the market to protect the neck from being injured in motorcycle accidents, the effectiveness of those neck braces is not clear due to the lack of scientific evidence of the injury reduction. Moreover, the absence of standard test me

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Al, Sofyani Sharaf. "Analytical Modeling and Experimental Analysis of Metalworking Fluids in theMilling Process." University of Toledo / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1494853268000644.

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Cerra, Flórez Mauro Andrés. "Synthesis and characterization of oxides produced by high temperature corrosion on grade 300 and 350 maraging steels." Doctoral thesis, TDX (Tesis Doctorals en Xarxa), 2021. http://hdl.handle.net/10803/672760.

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The aging heat treatments in maraging steels are fundamental to achieving their excellent mechanical properties and, in some applications using oxidation surface treatments lead to induce a superficial layer formed by iron spinel which in some cases it can be protective. In this research, an exhaustive study of the characterization and mechanical properties of the grade 300 and 350 maraging steels was performed. Trying to produce a spinel-like oxide film on these steels during the aging heat treatment at 485 ºC, a novel procedure with particular conditions based in different steps combining ti

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Pascart, Tristan. "Étude des modifications osseuses de composition et de structure au cours de l’ostéonécrose de tête fémorale et corrélations étiopathogéniques IRM." Thesis, Lille 2, 2017. http://www.theses.fr/2017LIL2S049/document.

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La physiopathologie et l'évolution structurale de l'ostéonécrose de tête fémorale (ONTF) sont des processus encore largement méconnus. Les objectifs de cette thèse ont été de rechercher des modifications de composition et de structure de l'os trabéculaire et de l'os sous-chondral dans l'ONTF. Un travail préliminaire s'est intéressé aux modifications de composition osseuse en spectrométrie Raman induites par l'embaumement afin de déterminer les témoins les plus appropriés pour comparer les os pathologiques. Des tissus osseux fémoraux issus de 5 sujets anatomiques embaumés ont ainsi été comparés

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Treffel, Loïc. "Dysfonctions vertébrales et posturales après simulations de la microgravité." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAJ111/document.

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Ce travail de thèse a pour but l’étude des douleurs de dos qui surviennent chez l’astronaute présentant davantage de hernies discales par rapport à une population contrôle. Nos recherches visent à comprendre la physiopathologie de ce phénomène et à étudier les conséquences cliniques de ce déconditionnement vertébral qui participe également aux troubles posturaux. Cet axe de recherche est recommandé par les différentes agences spatiales internationales. Pour cela nous avons eu l’opportunité d’analyser les données dans deux modèles d’études des effets de la microgravité : l’immersion sèche (n=11

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Min-WeiTsai and 蔡明煒. "Thermal balance optimal design with neural network for a CNC lathe spindle head." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/65hqnx.

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碩士<br>國立成功大學<br>機械工程學系<br>106<br>This study use a water-cooled film module with multiple physical coupling analysis and a neural network model that can estimate the nonlinear thermal distortion at the cutting point of the spindle head to estimate and control temperature distribution of a CNC lathe spindle head. In order to more effectively regulate the thermal errors of the machine tool, this study intends to obtain the simulation data of the key temperature points and thermal deformation of cutting points of the machine structure through numerical simulation analysis verified by the experimen

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Hsu, Chang-Yu, and 許長裕. "A Study on Tolerance Analysis and Adjustment for The Spindle Head of A CNC Lathe." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/43007511207058128290.

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碩士<br>國立中興大學<br>機械工程學系所<br>105<br>Spindle is the key component of a machine tool thus requires high precision. In addition to the precision of the spindle, firm and accurate assembly also play important roles in its final precision. This study is aimed toinvestigating tolerance analysis and adjustment in the assembly of the spindle head system for a CNC lathe. A cost-tolerance model dedicated for this spindle is constructed. Sensitivity and contribution analysis of each tolerancing specification and corresponding fabrication cost, in addition to tolerance analysis, are employed for adjusting t

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Hung, Ming-Chieh, and 洪名杰. "A Study of the Thermal Deformation and Multi-physics Optimization of a Machine Tool Spindle Head." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/24288896063580521495.

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碩士<br>國立中興大學<br>機械工程學系所<br>103<br>In this study the thermal deformation of a 3-axis machining center was analyzed experimentally and numerically. In the experiments, temperature variations of multiple (~40) points on the spindle head structure and the displacement of the cutting point with respect to time were measured. In the numerical analysis, a finite element method software (ANSYS) was utilized to simulate the transient thermal-fluidic-thermal elastic behavior of the spindle head structure. The numerical results are in reasonable agreement with the experimental results. Characteristics of

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Lin, Chih-Hua, and 林志華. "Effect of the Spindle Head Configuration on the Dynamic Characteristics and Machining Stability of a Milling Machine." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/40499155428350809536.

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碩士<br>國立勤益科技大學<br>機械工程系<br>103<br>This study was aimed to investigate dynamic characteristics and machining stability of a vertical milling machine with spindle tooling unit constructed into as different feeding configurations along Z direction. To assess the effect of the different spindle feeding head configuration on the machining stability, we created the finite element models of the two milling machines. To be a realistic model, a spindle tooling model with the modeling of the bearings and tool holder was created and integrated with the vertical machine frame model. The results of the fin

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Chiang, Chun-Ting, and 江郡婷. "A Study of Applying Taguchi Method to Improve Grinding Roundness Process for the Bore of Spindle Head." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/tu8e49.

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碩士<br>國立勤益科技大學<br>工業工程與管理系<br>105<br>The primary concern of this study was to develop an effective procedure for optimization of grinding parameters during the process of grinder components. An actual case of internal grinding process for spindle head of grinder was adopted to collect data. The result revealed that the circularity of inner hole was crucial to spindle head quality. The design of experiment to ascertain optimal grinding parameter was conducted by means of Taguchi methods. Following verification was further executed through application of RSM. Based on DMAIC approach of six sigma

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Chen, Mei-Hui, and 陳美惠. "An experimental and numerical study of thermal balance optimal design for a CNC horizontal turning center spindle head." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/42173098885887473602.

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碩士<br>國立中興大學<br>機械工程學系所<br>105<br>The design of the advanced turning center machine tools is becoming more and more complicated due to the increasing demand on function, cutting speed and cutting quality. The requirement for high rigidity, light weight and thermal stability of the machine tool is increasing, while for a both fast tapping and heavy duty cutting a stable and long term high processing accuracy are needed to be achieved. In the past, most machine tool designers elaborated static and modal analyses in the machine structural design, and relied on the empirical guideline for the cool

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Lin, Sheng-Jie, and 林聖傑. "The Variation of Structural Stiffness of Tool Machine due to the Modification of the Structure of Machine Column and Spindle Head." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/44207988938013361174.

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碩士<br>國立彰化師範大學<br>機電工程學系<br>97<br>The objective of this study is to apply finite element analysis to analyze the dynamics of the column and spindle head of Machine tool. The Pro/E is employed to construct the structure the Machine tool, including 3D assembly model. The problem is solved by the use of finite element method. The Pro/Mechanica is applied to obtain crucial designing parameters of dynamics. The variation of natural frequencies, mode shapes, stress distribution and structural rigidity of column and spindle head due to the change of their structures are studied. The result indicates

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Liu, Chia-An, and 劉家安. "A thermal-fluid-structural multi-physics transient analysis, optimization and experimental study of a 3-axis vertical machining center spindle head." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/71835030708363272702.

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碩士<br>國立中興大學<br>機械工程學系所<br>104<br>This study investigated the thermal displacement characteristics of a domestic three-axis vertical machining center. First, the machining center was operated at different rotational speeds to explore the temperature variation and the thermal deformation of the structure. Based on the experimental measurements, a multi-physics simulation model was constructed, modified and validated. This model was then used to predict the thermal deformation, as well as to evaluate the critical positions of temperature monitoring and control. Moreover, a cooling fan was used t

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Петрик, Сергій Михайлович, та Serhii Petryk. "Розробка конструкції виконавчих вузлів спеціального свердлильного верстата з ЧПК із багатошпиндельною свердлильною головкою". Master's thesis, 2020. http://elartu.tntu.edu.ua/handle/lib/33610.

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У кваліфікаційній роботі розроблено конструкцію виконавчих вузлів спеціального вертикально-свердлильного верстата з ЧПК з багатошпиндельною свердлильною головкою для одночасної обробки 12 отворів.<br>In the qualification work the design of executive units of a special vertical drilling machine with CNC with a multi-spindle drilling head for simultaneous processing of 12 holes was developed.<br>ВСТУП...41. АНАЛІТИЧНИЙ РОЗДІЛ 1.1.Аналіз конструкції базової моделі верстату та верстатів-аналогів...6 1.2.Аналіз конструкції та характеристики багатошпиндельнихсвердлильних головок...9 2. ПРОЕ

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NICOLAI, ALICE. "Anti-neoplastic effects of novel compounds on human head & neck squamous carcinoma cell lines." Doctoral thesis, 2022. http://hdl.handle.net/11573/1614138.

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Human head and neck squamous cell carcinomas (HNSCC) are the sixth most frequent cancers worldwide, characterized by recurrent metastasis and drug resistance. Aiming to develop a different and new therapy approach, we first analysed some novel synthesized aminopyrimidine compounds on several cancer cell lines, including HNSCC. These compounds were found to be good cancer cell proliferation inhibitors, especially a N-benzyl counterpart of RDS 3442, the reference molecule that in our earlier research demonstrated to be a promising negative regulator acting on tumor cell proliferation. Afterwards

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Карпишин, Святослав Романович, та S. R. Karpyshyn. "Дослідження силових характеристик елементів приводу головного руху токарного верстата для обробки деталей великих типорозмірів". Master's thesis, 2020. http://elartu.tntu.edu.ua/handle/lib/32097.

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В кваліфікаційній роботі магістра розроблено конструкцію коробки швидкостей токарного верстата для обробки деталей великих типорозмірів. Проведено силові розрахунки складових приводу головного руху.<br>Аналітичний розділ. Проектний розділ. Дослідний розділ. Охорона праці та безпека в надзвичайних ситуаціях. Загальні висновки. Перелік посилань. Додатки

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HOUNG, MAO-CHIN, and 洪茂欽. "Predicting Spindle Displacement Caused by Heat using Intelligent Algorithms." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/x6b8tx.

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碩士<br>國立勤益科技大學<br>電機工程系<br>107<br>Many factors, including room temperature, can cause the spindle, motor, screws and other components to heat up as machine tools are used during the machining process. This increase in temperature can cause thermal deformation in the different parts. In this study we used a Mike Machine Industry spherical machine tool, a domestically produced SYNTEC21-TA controller and a POSA belt-driven spindle to test the temperature increase and axial displacement changes at 1000, 1500,2000, 2500, 3000 rpm. Temperature sensors embedded in the front and rear bearings are used

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