Dissertations / Theses on the topic 'Metal-cutting machines'
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Tsui, Kin-shing. "Tool path generation for protrusion milling." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B36891332.
Full textКоротун, Микола Миколайович, Николай Николаевич Коротун, Mykola Mykolaiovych Korotun, and В. О. Шевченко. "Стенд для віртуальної лабораторної роботи з металорізальних верстатів." Thesis, Видавництво СумДУ, 2012. http://essuir.sumdu.edu.ua/handle/123456789/26890.
Full textЛагута, Георгій Геннадійович, Георгий Геннадьевич Лагута, Heorhii Hennadiiovych Lahuta, and В. В. Заводовская. "Проверка точности позиционирования металлорежущих станков (программное и математическое обеспечение)." Thesis, Издательство СумГУ, 2007. http://essuir.sumdu.edu.ua/handle/123456789/19264.
Full textTsui, Kin-shing, and 徐健成. "Tool path generation for protrusion milling." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B36891332.
Full textТарасов, М. В., Андрей Владимирович Павлов, Андрій Володимирович Павлов, and Andrii Volodymyrovych Pavlov. "Автоматизация металлорежущих станков." Thesis, Изд-во СумГУ, 2008. http://essuir.sumdu.edu.ua/handle/123456789/3944.
Full textЄмельяненко, Сергій Сергійович, Сергей Сергеевич Емельяненко, Serhii Serhiiovych Yemelianenko, and А. В. Кобушко. "Исследование кинематической точности металлорежущих станков." Thesis, Сумский государственный университет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/40032.
Full textЄмельяненко, Сергій Сергійович, Сергей Сергеевич Емельяненко, Serhii Serhiiovych Yemelianenko, and А. В. Пимоненко. "Исследование схем шпиндельных узлов металлорежущих станков." Thesis, Сумский государственный университет, 2017. http://essuir.sumdu.edu.ua/handle/123456789/62345.
Full textЄмельяненко, Сергій Сергійович, Сергей Сергеевич Емельяненко, Serhii Serhiiovych Yemelianenko, and В. М. Иванченко. "Температурные деформации металлорежущих станков и их влияние на точность обработки." Thesis, Сумский государственный университет, 2016. http://essuir.sumdu.edu.ua/handle/123456789/45858.
Full textЄмельяненко, Сергій Сергійович, Сергей Сергеевич Емельяненко, Serhii Serhiiovych Yemelianenko, and О. В. Тягно. "Исследование собственных частот колебаний металлорежущих станков." Thesis, Сумский государственный университет, 2018. http://essuir.sumdu.edu.ua/handle/123456789/67419.
Full textOzgen, Arda. "Cutting Strategies For Forging Die Manufacturing On Cnc Milling Machines." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609433/index.pdf.
Full textcutting speed, step over and feed are the main cutting parameters and these parameters affect geometrical accuracy and surface quality of the forging die cavities. In this study, effects of the cutting parameters on geometrical error have been examined on a representative die cavity profile. To remove undesired volume in the die cavities, available cutting strategies are investigated. Feed rate optimization is performed to maintain the constant metal removal rate along the trajectory of the milling cutter during rough cutting process. In the finish cutting process of the die cavities, Design of Experiment Method has been employed to find out the effects of the cutting parameters on the geometrical accuracy of the manufactured cavity profile. Prediction formula is derived to estimate the geometrical error value in terms of the values of the cutting parameters. Validity of the prediction formula has been tested by conducting verification experiments for the representative die geometry and die cavity geometry of a forging part used in industry. Good agreement between the predicted error values and the measured error values has been observed.
Medaska, Michael Kenneth. "The measurement of temperatures and forces in a turning operation with cutting fluid." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/15983.
Full textQian, Zhen-Qing. "An investigation into entry and exit failure of metal cutting tools." Thesis, University of Newcastle Upon Tyne, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241345.
Full textChoy, Hang-shan, and 蔡恆生. "Tool path trajectory analysis and machining strategy for corneringcut." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B31244117.
Full textChu, Tien-Hsiung. "An experimental study of the workpiece temperature on the machined surface during metal cutting." Thesis, University of Warwick, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322433.
Full textРуденко, Олександр Борисович, Александр Борисович Руденко, Oleksandr Borysovych Rudenko, К. С. Кісиленко, Ю. В. Клименко, І. Л. Якименко, М. В. Лиштван, and І. В. Чубун. "Створення бази електронних видань галузевих каталогів металорізальних верстатів." Thesis, Видавництво СумДУ, 2011. http://essuir.sumdu.edu.ua/handle/123456789/7455.
Full textOuyang, Donald N. B. "The dynamic modelling of industrial oxygen gas jet assisted CO₂ laser cutting of metal." Thesis, University of Glasgow, 1998. http://theses.gla.ac.uk/2475/.
Full textHavala, Jakub. "Design laserového řezacího stroje." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401502.
Full textŠupálek, Martin. "Design vertikální frézky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228417.
Full textДегтярьов, Іван Михайлович, Иван Михайлович Дегтярев, Ivan Mykhailovych Dehtiarov, Віталій Олександрович Іванов, Виталий Александрович Иванов, Vitalii Oleksandrovych Ivanov, and І. О. Криводуд. "Аналіз технологічних можливостей сучасних свердлильно-фрезерно-розточувальних верстатів." Thesis, Сумський державний університет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/39644.
Full textMatsumoto, Hidekasu. "Uma contribuição ao estudo do processo de torneamento de aços endurecidos." [s.n.], 1998. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264206.
Full textTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica
Made available in DSpace on 2018-07-23T21:54:22Z (GMT). No. of bitstreams: 1 Matsumoto_Hidekasu_D.pdf: 9333077 bytes, checksum: 51f227c51103bc62610f0c64d486742b (MD5) Previous issue date: 1998
Resumo: Neste trabalho procurou-se estudar a viabilidade de se tornear aços no estado endurecido utilizando máquinas de projeto mecânico convencional (sem mancais hidrostáticos e com um certo desgaste) comandadas numericamente, com a finalidade substituir as operações de retificação. Para tanto, usinou-se dois tipos de corpos de prova, de aço ABNT 52100 temperado e revenido com dureza média de 60 HRc (Rockwell C), com ferramentas de corte de PCBN (65% de CBN) e cerâmica mista ('Al IND. 2¿ 'O IND. 3¿ + TiC) encontradas no mercado. Monitorou-se os ensaios via corrente do motor principal e emissão acústica, com a finalidade de determinar o momento da substituição da ferramenta de corte. Após a análise dos resultados, chegou-se às seguintes conclusões: a) é possível substituir as operações de retificação por torneamento com máquina de projeto mecânico convencional, uma vez que se obteve qualidade IT5 e rugosidade menor que Ra = 0,6 'mu¿m, com vidas das ferramentas suficientemente longas para determinadas aplicações; b) os métodos de análise dos sinais de emissão acústica e corrente do motor utilizados, não se mostraram adequados para indicar o momento da troca da ferramenta; c) em geral, a ferramenta cerâmica apresentou vida média maior que a ferramenta de PCBN, porém com uma dispersão também maior
Abstract: The main goal of this work is to study the feasibility of turning hardened steels using a lathe with a conventional mechanical design (without hydrostatic bearings), aiming to replace grinding operations. For this purpose, two kinds of quenched and tempered 52100 steel workpieces were machined, with average hardness of 60 HRc, using PCBN (65% of CBN) and mixed ceramic ('Al IND 2¿¿O IND. 3¿ + TiC) tools. Both the electrical current of the main motor and the acoustic emission were monitored, aiming to automatically establish the moment to replace the tool. After the result analyses, the following conclusions were drawn: a) it is possible to replace grinding operations by turning with a conventional mechanical design lathe, since the workpiece quality obtained was within IT5 and the surface roughness was below Ra = 0.6 ' 'mu¿m, with tool life long enough for this kind of applications; b) the tool life monitoring through acoustic emission and electrical current of the main motor did not show to be suitable to establish the moment to replace the tool; c) in general, mixed ceramic tool had longer average toollife than PCBN tool, but presented larger scatter
Doutorado
Materiais e Processos de Fabricação
Doutor em Engenharia Mecânica
Di, Corpo Jeffrey. "Predictive monitoring for metal cutting machine tools." 1990. http://catalog.hathitrust.org/api/volumes/oclc/23037426.html.
Full textHsieh, Fu-Yung, and 謝富湧. "The Study on Correlation between Taiwan's Business Cycles and Machinery and Equipment Sales - Taking Metal Cutting Machine Manufacturing as an Example." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/9ry93g.
Full text國立東華大學
管理學院高階經營管理碩士在職專班
106
The purpose of this thesis is to investigate the factors of influence and correlation between the metal machining tool manufacturing and economic cycle of Taiwan. According to Revision 10 of the Standard Industrial Classification published by Directorate-General of Budget, Accounting and Statistics, Executive Yuan in January 2016, the business of metal machining tool manufacturing consists of the manufacturing of 6 types of machining tools and 3 types of machining centers, including NC lathes, other lathes, drilling machines, milling machines, saw machines, grinding machines, machining centers, other NC machining centers and other cutting centers. The data of 276 months in total were collected from Jan. 1994 to Dec. 2016 for the comparison between the highs and lows of economic cycles and stock index of Taiwan for the lead-lag relationships. The results are presented as follows: (1) economy and the average value of stock index are in the lead of the sales of metal machining tool manufacturing, indicating that economy and the trend of stock index have significant influence on the sales of metal machining tool manufacturing and can be the management reference index for other relevant industries; (2) as the difference between the peaks and lows of economy and the average percentage value of stock index show, the difference of percentage of grinding machines, other cutting centers, and drilling machines receive greater influence from economy and stock index, while the difference of percentage of NC lathes, other NC machining tools, and other lathes receive little influence from economy and stock index, indicating that economy and stock index has a significant influence on the sales of metal machining tool manufacturing.
Venkatesh, K. "Evolution Of Surface Roughness In Machining." Thesis, 1999. http://etd.iisc.ernet.in/handle/2005/1521.
Full textHUNG, CHUNG HSIUNG, and 洪崇雄. "INVESTIGATION OF METAL TURNINIG-REMOVAL Cr-Mo ALLOY STEEL CONSIDERING MACHINED SURFACE ROUGHNESS AND CUTTING FORCE." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/77975864992146924578.
Full textChang, Ueng-Tzung, and 張永宗. "The Study of the Maximum Metal Removal Rate of the Machine Tool Based on the Consideration of Cutting Vibration." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/98203094343812540837.
Full text國立屏東技術學院
機械工程技術研究所
84
The purpose of this thesis is to investigate the maximum metal removl rate in metal cutting process. The response surface methodology is used to build the predictive model of milling vibration and to select the experimental conditions in cutting medium carbon steel. An accelerometer and a frequency analyzer are served as the detecting and recording instruments. Then, the vibrating signal is analyzed and the standard deviations in time-domain and frequency-domain are founded to represent the vibration values. Therefore, the predictive equations are obtained in time-domain and frequency- domain respectively by the least square method of regression analysis. Eight experimental point by random choosing to verify those equations are conducted , and the errors are 17.2% and 14.03% for time-domain and frequency-domain respectively. The relationship between metal removal rate and vibration is explored with three depths of cut, which is related with the cutting speed and feed . The relation function between the surface roughness and vibration is alse founded. Under the same cutting conditions, the errors between the predicted values and experimental results are 14.34% and 12.39% in time-domain and frequency-domain respectively. Thus, a calculating system for the optimum cutting conditions based on the maximum metal removal rate has been developed from the mathematical prediction equations of milling vibration and the relation function between the surface roughness and vibration. keywords:Response SurfaceMethodology,Maximum Metal Removal Rate, Milling Vibration,Surface Roughness.
Lin, Kuo-Meng, and 林國盟. "The Relationship among Organizational Culture , Business Strategies and Performance Indices—The Case Study of Metal Cutting Machine Tools Industry in Taiwan." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/p3c235.
Full text朝陽科技大學
工業工程與管理系碩士班
93
The objective of this research is to examine the relatioiship among organizational culture, business strategies and performance indices in the metal cutting machine tools industry of Taiwan. Based on the related literature, documentation and expertise optirions.The quentionair norms are deueloped for the metal cutting machine tools industry.The following condusions are obtained form the statistical analysis of the surveyed data. 1. Organizational culture can have direct impact on performance indices, financial and customer aspects mostly. Generally speaking, the stronger organizational culture is, the better performance indices will be. 2. The result of the analysis indicates that the stronger consensual culture, developmental culture and hierarchical culture are, the higher financial aspect will be. The whole performance indices predicted could also be influenced by business strategies, but with less impact. 3. Different organizational cultures lead to different choices performance f actor business strategies. Generally speaking, rational culture is better off choosing prospector strategy, consensus strategy is better of adopting analyzer strategy, whereas reactors strategy is suitable for hierarchical culture. Different business strategies lead to different amount of attention to performance indices. Generally speaking, financial and customer aspects are of more importance.
Guimarães, Bruno Miguel Pereira. "Produção e caracterização de ferramentas de corte obtidas por tecnologia laser." Master's thesis, 2018. http://hdl.handle.net/1822/74205.
Full textA indústria das ferramentas de corte enfrenta atualmente grandes desafios uma vez que nos últimos anos, novos materiais com elevada dureza e baixa condutividade térmica estão, cada vez mais, a ser utilizados. Este panorama leva a que seja necessário desenvolver novas soluções usando materiais e processos de fabrico inovadores. A baixa condutividade térmica destes materiais resulta num rápido aumento da temperatura na zona de corte durante o processo de maquinagem induzindo assim uma taxa de desgaste rápida na ferramenta de corte, reduzindo a sua vida útil. Deste modo, a temperatura na aresta de corte desempenha um papel crucial durante o processo de maquinagem, procurando esta indústria novas formas para a reduzir eficazmente. A adição de materiais condutores à ferramenta de corte pode aumentar a sua condutividade térmica, permitindo reduzir a temperatura na aresta de corte e consequentemente o seu desgaste, aumentando o seu tempo de vida útil. Este trabalho consiste no desenvolvimento e produção de ferramentas de corte de metal duro (WC-Co) com canais de escoamento de calor que permitam aumentar a capacidade de extração de calor destas ferramentas. Este trabalho foi realizado em colaboração com a empresa PALBIT S.A. que pretende incorporar nas suas ferramentas de corte soluções que reduzam estes problemas. Inicialmente foram desenvolvidos vários designs para os canais de escoamento, cuja eficácia quanto à extração de calor foi aferida por via de simulação numérica. Partindo de compactos a verde, foi selecionada a tecnologia laser para a maquinagem dos canais de escoamento de calor, devido à versatilidade desta tecnologia. Após a maquinagem a laser estes compactos foram sinterizados e subsequentemente os canais de escoamento de calor foram preenchidos com materiais condutores. Os parâmetros de processamento utilizados na maquinagem a laser, especialmente a potência, velocidade de varrimento e espaçamento entre linhas, foram aferidos, uma vez que influenciam significativamente o processo de maquinagem, nomeadamente a qualidade do acabamento superficial, bem como a capacidade de remoção de material por parte do laser. A condutividade térmica das ferramentas desenvolvidas e produzidas foi obtida a partir da medição da resistividade elétrica a quatro pontos, usando a equação de Wiedemann-Franz. Os resultados mostraram que a adição de materiais condutores permite aumentar a condutividade térmica do metal duro em 110 e 130 % quando se adiciona cobre ou alumínio, respetivamente.
The cutting tool industry is currently facing major challenges as new materials with high hardness and low thermal conductivity are increasingly being used in recent years. This scenario leads to the need to develop new solutions using innovative materials and manufacturing processes. The low thermal conductivity of these materials results in a rapid increase in temperature in the cutting zone during the machining process, thereby inducing a rapid wear rate on the cutting tool, reducing its life time. In this way, the temperature at the cutting edge plays a crucial role during the machining process, seeking this industry new ways to effectively reduce it. The addition of conductive materials to the cutting tool can increase its thermal conductivity, allowing to reduce the temperature at the cutting edge and consequently its wear, increasing its life time. This work addresses the development and production of carbide cutting tools (WC-Co) having heat transfer channels to increase the heat extraction capacity of these tools. This work was performed in collaboration with the company PALBIT S.A., that intends to integrate in their cutting tools the solutions that allow to reduce the abovementioned problems. Initially, several designs were developed for the channels, whose efficiency in the extraction of heat was measured by means of numerical simulation. Starting from a green body, laser technology was selected for the machining of these heat transfer channels, due to the versatility of this technology. After laser machining, these compacts were sintered and subsequently the heat transfer channels were filled with conductive materials. The processing parameters used for the laser machining, especially the power, scanning speed and line spacing, were evaluated as they significantly influence the machining process, namely the surface finish quality as well as the ability of the laser to remove material. The thermal conductivity of the tools developed and produced was obtained by measuring the electrical resistivity at four points, using the Wiedemann-Franz equation. The results showed that the addition of conductive materials allows to increase the thermal conductivity of hard metal by 110 and 130% when copper or aluminum is added, respectively.
Este trabalho foi apoiado pela FCT através do projeto POCI-01-0145-FEDER-030353 (SMARTCUT), PTDC/EMS-TEC/5422/2014 (ADAPTPROSTHESIS) e também pelo projeto NORTE 01- 0145_FEDER-000018 (HAMaBICo). Além disso, este trabalho foi financiado pela FCT com o projeto de referência UID/EEA/04436/2013, por fundos FEDER através do COMPETE 2020-Programa Operacional Competitividade e Internacionalização (POCI) com o projeto de referência POCI-01-0145- FEDER-006941.