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Dissertations / Theses on the topic 'Wear in machining tools'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 February 2022

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1

Fish, Randall K. "Dynamic models of machining vibrations, designed for classification of tool wear /." Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/6033.

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2

Odelros, Stina. "Tool wear in titanium machining." Thesis, Uppsala universitet, Institutionen för kemi - Ångström, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-176944.

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The present work was performed at AB Sandvik Coromant as a part in improving the knowledge and understanding about wear of uncoated WC/Co cutting tools during turning of titanium alloy Ti-6Al-4V. When machining titanium alloys, or any other material, wear of the cutting tools has a huge impact on the ability to shape the material as well as the manufacturing cost of the finished product. Due to the low thermal conductivity of titanium, high cutting temperatures will occur in narrow regions near the cutting edge during machining. This will result in high reaction and diffusion rates, resulting

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3

Brown, Charles Jeremy. "An investigation of tool stresses caused by unsteady chip formations in machining." Thesis, Queen's University Belfast, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236295.

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4

Taylor, Ciaran John. "The wear and performance characteristics of PCBN cutting tools when machining D3 hardened steel." Thesis, University of Hull, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.431046.

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5

Ghadimzadeh, Seyed Reza. "Machining of hypereutectic aluminium-silicon alloy." Thesis, Coventry University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.281726.

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6

Chen, Wuyi. "The machining of hardened steel using superhard CBN tooling and CBN tipped rotary cutting tools." Thesis, University of Birmingham, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342395.

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7

Rheinheimer, Carlos Eduardo Borsoi. "Influências do revestimento no desgaste da ferramenta no processo hobbing." reponame:Repositório Institucional da UCS, 2018. https://repositorio.ucs.br/handle/11338/3658.

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A alta demanda das indústrias, aliada a necessidade de alta eficiência, fomenta avanços tecnológicos na área de usinagem. Os revestimentos para recobrimento de ferramentas de usinagem vêm para atender essa necessidade, aumentando a durabilidade, e a confiabilidade das ferramentas. Este trabalho analisou o efeito de três diferentes revestimentos de ferramentas de usinagem (TiN, TiAlN e CrAlN) sobre o desgaste da ferramenta no processo de geração de engrenagens por hobbing. Para isso foram realizados ensaios experimentais utilizando uma única ferramenta hob, que após passar por processo de afiaç

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8

Marafona, Jose Duarte R. "The influence of migrated materials on tool wear ratio." Thesis, Nottingham Trent University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268342.

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9

Li, Kuan-Ming. "Predictive Modeling of Near Dry Machining: Mechanical Performance and Environmental Impact." Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-05122006-143200/.

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Thesis (Ph. D.)--Mechanical Engineering, Georgia Institute of Technology, 2007.<br>Dr. Liang, Steven Y., Committee Chair ; Dr. Melkote, Shreyes N., Committee Member ; Dr. Vengazhiyil, Roshan Joseph, Committee Member ; Dr. Zhou, Chen, Committee Member ; Dr. Zhou, Min, Committee Member.

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10

Hatt, Oliver. "On the mechanism of tool crater wear in titanium alloy machining." Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/17231/.

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Today the aerospace industry spends hundreds of millions of dollars on the machining of titanium alloy components. And with increasing aircraft orders, there is pressure to machine at higher production rates and develop more machinable alloys (e.g. TIMETAL® 54M, TMETAL® 407) without compromising titanium’s excellent mechanical properties. Increasing the tool life by a factor of minutes can have a dramatic effect on machining cost. Unlike steels, the same tool grade is used for all titanium alloy types from alpha to beta rich, with the latter being more difficult to machine. Diffusion dominated

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11

Zanella, Cassiano. "Efeito do tratamento da microgeometria de ferramentas com revestimento diamantado no fresamento de eletrodo de grafite." reponame:Repositório Institucional da UCS, 2018. https://repositorio.ucs.br/handle/11338/3716.

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A crescente necessidade de fabricação de moldes com prazos e custos cada vez menores exige das ferramentarias a personalização e melhoria de seus processos de fabricação. Uma das maneiras de atingir isso é através da melhoria na usinagem dos eletrodos, já que esse processo afetará diretamente a precisão dimensional e tempo de produção de um molde. O uso de grafite como matéria-prima para esses eletrodos é altamente satisfatório, pois esse material apresenta a vantagem de ser usinado mais rapidamente e permitir uma grande variedade de formas geométricas, contudo, sua principal desvantagem é o a

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12

Miner, Woodrow D. "A Tool Wear Comparative Study in Turning Versus Computer Simulation in 1018 Steel." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd744.pdf.

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13

Okeke, Christopher Igwedinma. "Threading and turning of aerospace materials with coated carbide inserts." Thesis, London South Bank University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297919.

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The first part of this study involve an evaluation of the performance of TiN and AlZ03 single layer coated cemented carbide tools when threading inclusion modified, 708M40T (En 19T) 817M40T (En 24T) and Jethete steels at high cutting conditions by monitoring tool wear, failure modes, post threading workpiece properties, micro and macro-surface alterations and subsurface microhardness variation of threaded surfaces. Test results show that flank wear was the dominant failure mode, increasing rapidly when machining at the top speed of 225 m min,l due to the high temperature generated which accele

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14

Khatri, Ashutosh Mahesh. "INVESTIGATING TOOL WEAR MECHANISM AND MICROSTRUCTURALCHANGES FOR CONVENTIONAL AND SUSTAINABLE MACHINING OFTITANIUM ALLOY." Miami University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=miami1533287855502478.

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15

Hagberg, William. "Temperature effect on insert tool life in dry machining." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-83933.

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This thesis work researched the temperature effects the insert tool life. This was examined through physical laboratory testing with designed milling tools and temperature simulations in ANSYS. The designed milling tools altered the temperature in the insert through external parameters like design and material. Three milling tools were used in total: A milling tool created in an copper alloy that cools the inserts, a milling tool created in the material idun that increases the temperature in the inserts, and the milling tool Coro Mill 245 that was used as a reference. These tools were tested w

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16

Hsiao, Ya-Tsun. "In-process evaluation of tool wear effects on surface roughness variation in hard turning /." free to MU campus, to others for purchase, 1998. http://wwwlib.umi.com/cr/mo/fullcit?p9904848.

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17

Ray, Nathan. "Correlation between machining monitoring signals, cutting tool wear and surface integrity on high strength titanium alloys." Thesis, University of Sheffield, 2018. http://etheses.whiterose.ac.uk/20660/.

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It is widely accepted that tool wear has a direct impact on a machining process, playing a key part in surface integrity, part quality, and therefore, process efficiency. By establishing the state of a tool during a machining process, it should be possible to estimate both the surface properties and the optimal process parameters, while allowing intelligent predictions about the future state of the process to be made; thus ultimately reducing unexpected component damage. This thesis intends to address the problem of tool wear prediction during machining where wear rates vary between components

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18

Fortunet, Charles. "Zavedení systému kontroly opotřebení při vrtání a řezání závitů do strojních dílů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231706.

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The topic of this thesis is divided in two main parts. The first is about the “tool/workpiece pair” method and the second is related to wear monitoring. The entire project will be about drilling and tapping operations done in SNECMA Vernon. In fact, the part is very expensive so they have to be closely controlled to avoid a maximum scrap pieces. Two software will be used to control it. Firstly, the “tool/workpiece pair” will be done through AMC3 (software developed at the ENSAM). And secondly the wear monitoring will be ensured by the software CTM Visu (developed by ARTIS). My task will be to

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19

Chakraborty, Pinaki. "Tool Life and Flank Wear Modeling of Physical Vapour Deposited TiAlN/TiN Multilayer Coated Carbide End Mill Inserts when Machining 4340 Steel Under Dry and Semi-Dry Cutting Conditions." Scholarly Repository, 2008. http://scholarlyrepository.miami.edu/oa_dissertations/22.

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This study investigates the tool wear of advanced PVD TiALN/TiN multilayer coated end mill inserts when dry and semi-dry machining 4340 low alloy medium carbon steel. A factorial design of experiment setup consisting of two levels of speed, three levels of feed, two levels of depth of cut, and two levels of cutting conditions (semi-dry and dry) was used for the study. The combination of cutting conditions that gave the best response for different components of cutting force, cutting power, surface roughness and tool life were determined using MANOVA & ANOVA analysis and Tukey comparison of mea

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20

Hoseini, Saba. "Experimental simulation of gear hobbing through a face milling concept in CNC-machine." Thesis, KTH, Materialvetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-126804.

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21

Cococcetta, Nicholas Michael. "Investigating Surface Finish, Burr Formation and Tool Wear During Sustainable Machining of 3D Printed Carbon Fiber Reinforced Polymer (CFRP) Composites." Miami University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=miami1586533608277002.

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22

Kull, Neto Henrique 1988. "Uma contribuição ao estudo do fresamento de liga de titânio : vida de ferramenta, forças de corte e rugosidade da peça." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263046.

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Orientador: Anselmo Eduardo Diniz<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica<br>Made available in DSpace on 2018-08-22T01:55:03Z (GMT). No. of bitstreams: 1 KullNeto_Henrique_M.pdf: 6161142 bytes, checksum: 4f755b77cb291982660eff8091931b82 (MD5) Previous issue date: 2013<br>Resumo: O titânio e suas ligas são considerados materiais de baixa usinabilidade devido a diversas propriedades inerentes ao material. Dentre elas pode-se citar a alta resistência mecânica em altas temperaturas, a baixa condutividade térmica, a alta reatividade química

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23

Blom, Ricky J. "Production and Evaluation of Rapid Tooling for Electric Discharge Machining using Electroforming and Spray Metal Deposition Techniques." Queensland University of Technology, 2005. http://eprints.qut.edu.au/16014/.

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To survive in today's manufacturing environments companies must push the standards of accuracy and speed to the highest levels possible. Electro Discharge Machining (EDM) has been used for over 50 years and recent developments have seen the use of EDM become much more viable. The goal of this research is to produce and evaluate electrodes produced by different manufacturing methods. The use of electroforming and spray-metal deposition has only recently become viable methods of producing usable rapid tooling components. The speed and accuracy as well as the cost of manufacture play a vital

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24

Jesus, Edilson Rosa Barbosa de. "FERRAMENTAS DE USINAGEM EM AÇO RÁPIDO AISI M2 OBTIDO POR CONFORMAÇÃO POR SPRAY." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-11072007-073936/.

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O objetivo do presente trabalho foi à obtenção de aço rápido tipo AISI M2 pela técnica da conformação por spray e a avaliação deste, quanto ao seu desempenho quando aplicado como ferramenta de usinagem. O material obtido foi laminado a quente com razões de redução de 50 e 72%, resultando em placas a partir das quais foram confeccionadas pastilhas intercambiáveis para realização de testes de usinagem. O desempenho das pastilhas obtidas a partir do material conformado por spray e laminado a quente, foi confrontado com o de pastilhas confeccionadas a partir de material processado convencional

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25

Kartha, Aravind, and Shravan Subramanian. "Turning of tool steel : Study on the effect of insert grade and entering angle on tool life." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-281530.

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PrimeTurning™ is a new turning technology, which consists of tools and programming method. By using this method, it has been demonstrated that higher material removal rates and flexibility in turning can be obtained. The New Product Industrialisation department at AB Sandvik Coromant works with development of production processes and improvements in current processes.Machining tests are carried out in order to improve production performance, and find optimised solutions. In this master thesis work, the effect of insert grades and entering angles on wear and tool life while machining hardened

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26

Cooper, Clayton Alan. "Milling Tool Condition Monitoring Using Acoustic Signals and Machine Learning." Case Western Reserve University School of Graduate Studies / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1575539872711423.

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27

Wolf, Jason. "INVESTIGATION OF CHIP-FORM AND TOOL-WEAR IN TURNING OF HARDENED AF9628 ALLOY UNDER VARIOUS COOLING AND LUBRICATION CONDITIONS." UKnowledge, 2019. https://uknowledge.uky.edu/ms_etds/10.

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Next generation defense and commercial applications for structural steels require new alloys that eliminate or reduce critical elements from their composition to lower cost and improve manufacturability, while maintaining or exceeding high strength and toughness requirements. A new alloy, denoted as AF9628, has recently been developed for this purpose and its manufacturing characteristics and the material response in component manufacturing must be fully understood. In the present study, hardened AF9628 alloy was turned with a coated carbide cutting tool under fixed cutting speed, feed rate, a

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Oliveira, Adilson Jose de. "Analise do desgaste de ferramentas no fresamento com alta velocidade de aços endurecidos." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264187.

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Orientador: Anselmo Eduardo Diniz<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica<br>Made available in DSpace on 2018-08-08T23:12:33Z (GMT). No. of bitstreams: 1 Oliveira_AdilsonJosede_D.pdf: 5045036 bytes, checksum: f173982d932402dfe8a6935cdb29b638 (MD5) Previous issue date: 2007<br>Resumo: Normalmente, os componentes dos moldes e matrizes responsáveis pela forma das peças manufaturadas têm complexas geometrias e são confeccionados em materiais de elevada dureza, o que torna a atividade de usinagem mais difícil. A utilização do Fresamento com Altas

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Antonialli, Armando Italo Sette. "Uma contribuição ao fresamento frontal da liga de titanio Ti-6Al-4V." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264153.

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Orientador: Anselmo Eduardo Diniz<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica<br>Made available in DSpace on 2018-08-12T21:04:08Z (GMT). No. of bitstreams: 1 Antonialli_ArmandoItaloSette_M.pdf: 4713382 bytes, checksum: def6e55af0d1c4dc5c508bbe6440464c (MD5) Previous issue date: 2009<br>Resumo: As ligas de titânio apresentam baixa usinabilidade devido à reduzida condutividade térmica, à manutenção de suas propriedades mecânicas em altas temperaturas, à elevada afinidade química com os materiais de ferramentas e ao baixo módulo de elasticidad

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30

Pires, Bruno Jorge. "Estudo das forças, vibrações e desgaste das ferramentas no fresamento da liga de titânio Ti-6A1-4V." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264148.

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Orientador: Anselmo Eduardo Diniz<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica<br>Made available in DSpace on 2018-08-17T14:51:33Z (GMT). No. of bitstreams: 1 Pires_BrunoJorge_M.pdf: 4048093 bytes, checksum: 91ac8c1d8bef0f7903675a183371c8bc (MD5) Previous issue date: 2011<br>Resumo: Ligas de titânio já apresentam um papel de grande importância na indústria aeroespacial, petroquímica e de biomateriais. A combinação de alta resistência mecânica, baixa densidade, resistência à corrosão, biocompatibilidade, boa tolerância tecidual e manutenção

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31

JESUS, EDILSON R. B. de. "Ferramentas de usinagem em aco rapido AISI M2 obtido por conformacao por 'Spray'." reponame:Repositório Institucional do IPEN, 2004. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11244.

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Made available in DSpace on 2014-10-09T12:49:52Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:03:11Z (GMT). No. of bitstreams: 0<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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Halila, Faycel. "Modélisation analytique et caractérisation expérimentale de l'usure par abrasion des outils de coupe." Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0147/document.

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Les difficultés majeures rencontrées en production des pièces mécaniques métalliques sont dues aux conditions de chargements extrêmes appliqués lors de la mise en forme ainsi qu'au problème de l'usure prématurée des outils de coupe de coupe. Dans ce cadre, les travaux de thèse sont centrés sur la mise en évidence et la compréhension des mécanismes physiques mis en jeu lors de l'usure des outils de coupe depuis l'échelle de la microstructure jusqu'à celle du système usinant, en passant par l'échelle de la pointe de l'outil (échelle mésoscopique). A cet effet, Un modèle analytique permettant de

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33

Sedláček, Jan. "Efektivní obrábění vláknově vyztužených kompozitních materiálů." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-233910.

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The objectives for this dissertation are to push forward the current state of knowledge in the area of machining fiber-reinforced plastic (FRP). The most common machining operation performed on these materials is drilling owing to the need for component assembly in mechanical pieces and structures. Among the defects caused by drilling, delamination appears as to be of the most critical and may occur at both the entrance and exit plane. A number of theoretical and experimental studies have been made to create an analytical model of delamination in composite laminates. In this dissertation, the

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Čejka, Libor. "Produktivní obrábění titanových slitin." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230589.

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The aim of the thesis is to analyze the production costs and optimize cutting conditions for high-feed face milling of titanium alloy Ti6Al4V. In the experiment were changed cutting conditions, such as cutting speed vc and feed speed vf. During the experiment were checked cutting forces by dynamometr. Furthermore, surface roughness and tool wear is observed.

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Wagner, Vincent. "Amélioration de la productivité en usinage d'un titane réfractaire : le Ti5553." Thesis, Toulouse, INPT, 2011. http://www.theses.fr/2011INPT0016/document.

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Les travaux présentés dans cette thèse s'inscrivent dans le contexte de la modélisation et la compréhension des phénomènes liés à l'usinage du Ti5553. L'objectif des travaux est de lever certains verrous scientifiques et d'améliorer les connaissances sur l'usinage de ce matériau afin de proposer des conditions de coupe et d'engagement optimales à l'entreprise Messier-Dowty. Nous avons identifié plusieurs modèles nous permettant de décrire au mieux le processus de coupe en tournage et en fraisage. Au niveau de l'usure des outils et des possibilités d'amélioration de l'usinabilité de l'usinage d

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Reichman, Ladislav. "Vytvoření databázové aplikace pro zkoušky obrábění u zákazníka." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229910.

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This master's thesis summarizes information about the machining tests. The thesis describes the mechanisms and forms of cutting tool wear. Part of the thesis is analysis of the current state of Pramet Tools Company machining tests database application. The result of the thesis is complete new database application design.

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Cardoso, Marlon José. "Análise do processo de furação profunda no aço SAE 4144M endurecido utilizando MQL e broca helicoidal revestida." Universidade Tecnológica Federal do Paraná, 2014. http://repositorio.utfpr.edu.br/jspui/handle/1/877.

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Os processos de furação são largamente utilizados na indústria metal mecânica, envolvendo grande complexidade para profundidades maiores que cinco vezes o diâmetro. Para estes casos é necessário o emprego de máquinas, ferramentas especiais e fluidos lubri-refrigerantes pressurizados, com propriedades que atendam as solicitações severas do corte e auxiliem no transporte e remoção dos cavacos durante o processo. Esta complexidade aumenta os custos do processo, o impacto ambiental e os riscos a saúde do operador. O propósito deste estudo é analisar o processo de furação profunda com broca helicoi

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Irshad, Muhammad Aatif. "The effect of prior austenite grain size on the machinability of a pre-hardened mold steel. : Measurement of average grain size using experimental methods and empirical models." Thesis, Karlstads universitet, Avdelningen för maskin- och materialteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-8777.

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The use of pre-hardened mold steels has increased appreciably over the years; more than 80% of the plastic mold steels are used in pre-hardened condition. These steels are delivered to the customer in finished state i.e. there is no need of any post treatment. With hardness around ~40HRC, they have properties such as good polishability, good weldability, corrosion resistance and thermal conductivity. Machinability is a very important parameter in pre-hardened mold steels as it has a direct impact on the cost of the mold. In normal machining operations involving intricate or near net shapes, ma

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Ayed, Yessine. "Approches expérimentales et numériques de l’usinage assisté jet d'eau haute pression : étude des mécanismes d'usure et contribution à la modélisation multi-physiques de la coupe." Thesis, Paris, ENSAM, 2013. http://www.theses.fr/2013ENAM0056/document.

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Cette étude porte sur l'usinage de l'alliage de titane Ti17 avec une assistance jet d'eau haute pression. Une attention particulière a été portée à l'analyse des mécanismes de dégradation et d'usure des outils lors de l'usinage avec et sans assistance. Le suivi de l'usure est réalisé par des observations régulières au microscope électronique à balayage (MEB) et par des analyses chimiques (technique EDS) afin de déterminer les zones de dépôt de matière sur l'outil. Toutes ces observations ont permis d'expliquer les mécanismes d'usure pour une opération d'ébauche et de finition. Il a été montré

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Ribeiro, Lúcia de Almeida. "Aplicação de ferramentas cerâmicas à base de óxido de alumínio no torneamento da superliga VAT 32®. /." Guaratinguetá, 2020. http://hdl.handle.net/11449/192867.

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Orientador: Marcos Valerio Ribeiro<br>Resumo: A superliga de ferro-níquel VAT 32® foi desenvolvida como um substituto da liga de níquel 751 (UNS N07751) usada na fabricação de válvulas automotivas para motores de combustão interna de alto desempenho. A formação de carbonetos de nióbio confere a esta liga elevada resistência ao desgaste, desejada na aplicação em válvulas automotivas, criando-se, porém, uma maior dificuldade na usinagem deste material. Este trabalho estudou o torneamento da liga VAT 32® com dois tipos de ferramentas cerâmicas, sendo pastilhas de materiais cerâmicos experimentais

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Gaspar, Pedro Miguel Mendes Alves Pequito. "Análise da maquinabilidade do aço AISI P20." Master's thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/16751.

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Mestrado em Engenharia Mecânica<br>No presente trabalho realizou-se um estudo sobre a maquinabilidade do aço de construção ligado AISI P20, em operações de torneamento, usando duas ferramentas de corte da mesma classe, mas com propriedades diferentes, uma com maior resistência ao desgaste (P05) e outra com maior tenacidade (P15). O estudo foi desenvolvido em três fases distintas. Numa primeira fase foi avaliado o acabamento da superfície da peça maquinada e a forma das aparas obtidas, recorrendo aos ensaios de corte curtos. Na segunda fase foi avaliado o acabamento da superfície da peç

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De, Bruyn Ruan. "Improving and implementing advanced milling techniques for the manufacture of selected titanium aerospace parts." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/96139.

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Thesis (MEng)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: There is a strong focus on the use of titanium and its alloys in the aerospace industry due to the high ultimate tensile strength and high strength-to-weight ratio of the material. The high performance nature of the material also makes it difficult and costly to machine. South Africa has the second most abundant titanium resources in the world in the form of rutile and ilmenite but no value chain to produce titanium parts from the ore. Currently, the ore is sold overseas at low prices. There exists an initiative to create a ful

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Kudrna, Tomáš. "Elektroerozivní hloubení technické keramiky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417445.

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The master’s thesis deals with the topic of electrical discharge machining. The first part of the thesis contains a study of the die-sinking EDM. The die-sinking EDM of the silicon carbide ceramic is realized in the experimental part of the thesis. The result of this work was to explore the influence of the EDM sinking parameters, specifically pulse current, open-voltage and pulse on-time, on the machined surface. Furthermore, the analysis of the tool electrode was made. This analysis was focused on the wear in the corners, which has key influence on accuracy of the machining. The machining ti

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Salazar, Carlos Eddy Valdéz. "Avaliação através da inspeção magnética da condição superficial de anéis de rolamento de aço DIN 100Cr6 após torneamento duro a seco." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/3/3151/tde-11052009-174233/.

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O presente trabalho visa apresentar informações que viabilizem a fabricação de componentes de rolamentos com limites superiores de resistência à fadiga, com a intenção de proporcionar uma vida útil maior ao rolamento, e, também, a otimização da fabricação das peças, dispensando em alguns casos o processo final e usual de retificação, o que implica uma redução de custos. As motivações deste estudo são a geração de altas tensões residuais compressivas no torneamento duro-seco a altas velocidades, a aplicação do RMB como técnica de medição das tensões residuais em aço 100CrMn6 e a otimização da q

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Bajalan, M. R. "Machining of steels with ceramic tools." Thesis, University of Warwick, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357239.

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Kordonowy, David N. (David Nathaniel) 1981. "A power assessment of machining tools." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/31108.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2002.<br>Includes bibliographical references (p. 75-76).<br>Energy conservation is becoming a more important ideal in today's society, due to the increasing awareness of environmental and economic impacts. This project experimentally measures the power consumption, which is related to the energy consumption, of machines in the Laboratory for Manufacturing and Productivity, in order to determine the energy cost of the machines. This project then compares the results found experimentally to the theoretical min

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Bruno, Danver Messias. "Estudo da aplicação de insertos de cerâmica avançada na usinagem de ultraprecisão em aços endurecidos." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/18/18145/tde-27092013-105238/.

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O objetivo principal desse trabalho é investigar a aplicação de cerâmica á base de Zirconia em ferramentas de corte na usinagem de aço temperado (VND) utilizando um torno de ultraprecisão. Foram analisados dois tipos de composições de cerâmicas com estrutura cristalina diferentes, sendo elas: monoclínica e tetragonal. A diferença destas estruturas é devido à adição de Ytria. A fase monoclínica não contém Ytria em sua composição, enquanto, a fase tetragonal é obtida com Ytria (\'Y IND.3\') (chamada zirconia parcialmente estabilizada com Ytria). A fase tetragonal apresenta uma resistência elevad

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Wang, Xihong. "Edge wear mechanisms of weedcutting tools /." Full text open access at:, 1994. http://content.ohsu.edu/u?/etd,242.

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Mahmoud, El-Amin A. "Machining with titanium nitride-coated metal tools." Thesis, Aston University, 1988. http://publications.aston.ac.uk/11912/.

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Oosthuizen, Gert Adriaan. "Wear characterisation in milling of Ti6Al4V : a wear map approach." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/5426.

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Thesis (PhD (Industrial Engineering))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: Information on the milling of Ti6Al4V is limited; with most studies concluding that it is not possible to obtain a significant increase in the material removal rate (Qw). Tool wear maps can be a diagnostic instrument for failure analysis. Cutting speed (vc), maximum un-deformed chip thickness (heMax) and the radial immersion percentage (ae/Ø %) are the key variables in understanding the milling of titanium alloys. The objective of this research study was to construct tool wear maps for the milling of

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