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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
31

An analysis, design, and improvement methodology for shape rolling processes and procedures for the compensation of dies

Belinski, Robert A. January 1999 (has links)
Thesis (Ph. D.)--Ohio University, June, 1999. / Title from PDF t.p.
32

Virtual manufacturing on the Web extrusion die design.

Shivananda, Sripada. January 1998 (has links)
Thesis (M.S.)--Ohio University, August, 1998. / Title from PDF t.p.
33

The stress patterns and residual stresses developed in curved die upsetting

Shih, Yi-Pu. January 1993 (has links)
Thesis (M.S.)--Ohio University, March, 1993. / Title from PDF t.p.
34

The evaluation of the repeatability and performance of the cast iron multifacet drill

Chou, Kou-Ching. January 1984 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1984. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 126-128).
35

A CAD/CAM system for sheet metal blanking dies /

Wong, Kai-wing. January 1991 (has links)
Thesis (M. Phil.)--University of Hong Kong, 1992.
36

Spray cooling of steel dies in a hot forging process

Endres, Matthew J. January 2002 (has links)
Thesis (M.S.)--Worcester Polytechnic Institute. / Keywords: atomizing; spray cooling; thermal stress. Includes bibliographical references (p. 54).
37

Coefficients of static friction for lubricated steel surfaces

Sarin, Lalit Kumar. January 1965 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1965. / eContent provider-neutral record in process. Description based on print version record. Bibliography: l. 64-66.
38

Optimization of a new preform die design for forging a rotating part using computer modeling and analysis /

Al-Mufadi, Fahad. January 2004 (has links)
Thesis (Ph.D.)--Ohio University, June, 2004. / Includes bibliographical references (leaves 150-158)
39

Aplicação de fluido de corte em quantidades reduzidas para usinagem do aço SAE 52100 no processo de retificação centerless de passagem

Gonçalves Neto, Luiz Maurício [UNESP] 12 September 2013 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:35:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2013-09-12Bitstream added on 2014-06-13T20:46:54Z : No. of bitstreams: 1 goncalvesneto_lm_dr_bauru_parcial.pdf: 467034 bytes, checksum: 2bcecb1f926016c9fb67986aaa61bd48 (MD5) Bitstreams deleted on 2015-06-25T13:01:24Z: goncalvesneto_lm_dr_bauru_parcial.pdf,. Added 1 bitstream(s) on 2015-06-25T13:03:35Z : No. of bitstreams: 1 000722680_20161010.pdf: 395351 bytes, checksum: 75e21b3a6eaf2785643e33fc7caec54e (MD5) Bitstreams deleted on 2016-10-10T12:18:28Z: 000722680_20161010.pdf,. Added 1 bitstream(s) on 2016-10-10T12:19:01Z : No. of bitstreams: 1 000722680.pdf: 3376023 bytes, checksum: 9612a64fd3199196c204263b3922817d (MD5) / A presente tese propõe dar uma contribuição para o estudo de aplicação de fluido de corte no processo de retificação centerless de passagem, comparando os efeitos causados em termos de integridade da peça retificada entre a técnica convencional e a técnica aprimorada desenvolvida para o uso racional dos fluidos de corte. As condições testadas foram as seguintes: retificação centerless de passagem utilizando rebolo de corte convencional (C120TB24), três condições de lubrirefrigeração, bocal convencional (BC), bocal multitubular utilizando emulsão (BME) e bocal multitubular utilizando simultaneamente emulsão e ar comprimido (BMEA). Vazão do ar comprimido 170 L/min, vazões da emulsão: 10 L/min, 20 L/min, 30 L/min e 40 L/min e remoção de material de 0,03 mm e 0,10 mm. As variáveis de saída estudadas foram a rugosidade da superfície retificada, o desvio de circularidade e a tensão residual. Além disso, foram realizadas análise metalográfica, análise por partículas magnéticas e ataque químico com ácido nítrico da superfície retificada a fim de identificar a ocorrência de danos térmicos. Em relação às três técnicas de aplicação de fluido de corte utilizados (BC, BME e BMEA) no processo de retificação centerless passagem, em geral, observou-se um melhor desempenho com a utilização do novo conceito de bocal multitubular desenvolvido. As melhores condições de retificação foram observadas utilizando o BMEA para as vazões de 30 L/min e 40 L/min e com o BME para vazão de 30 L/min, removendo 0,03 mm de material. Para essas condições o processo foi capaz de garantir a integridade das peças, pois não apresentam danos térmicos às superfícies retificadas e mantiveram-se os valores dos desvios de circularidade e rugosidade superficial recomendados para o processo de retificação. O método convencional (BC)... / This work aims to contribute to the study and application of cutting fluid in the process of through-feed centerless grinding, comparing the effects in terms of workpiece integrity between the conventional technique and the improved technique developed for the rational use of cutting fluids. The test conditions were as follows: through-feed centerless grinding using silicon carbide resinoid grinding wheel (C120 TB24), three conditions of lubri-refrigeration, conventional nozzle (BC), multi-tube nozzle with emulsion (BME) and multitube nozzle with emulsion and compressed air simultaneously (BMEA). Compressed air flow rate 170 L/min, emulsion flow rate: 10 L/min, 20 L/min, 30 L/min, 40 L / min and material removal from 0,03 mm to 0,10mm. The output variables studied were the roughness of the ground surface, roundness deviation and residual stress. Additionally, metallographic analysis were performed as well as chemical attack with nitric acid on the ground surface in oder to identify the occurrence of thermal damage. Regarding the three techniques of cutting fluid application (BC, BME and BMEA0 in the process of through-feed centerless grinding, in general we observed a better performance when using the new concept of developed multi-tube nozzle. The best grinding conditions were observed using BMEA for the flow ratesn of 30 L/min and 40 L/min and with BME for the rate of 30 L / min, removing 0,03 mm of material. Fo these conditions the process was able to ensure workpiece integrity, since there were not thermal damage to the surface that were ground and the deviation values of roundness and surface roughness recommended for the grinding process were kept. The conventional method (BC) showed thermal damage in the layer that was ground for all conditions tested and the residual stress values of the ground... (Complete abstract click electronic access below)
40

Aplicação de fluido de corte em quantidades reduzidas para usinagem do aço SAE 52100 no processo de retificação centerless de passagem /

Gonçalves Neto, Luiz Maurício. January 2013 (has links)
Orientador: Eduardo Carlos Bianchi / Banca: Sandro Donnini Mancini / Banca: Rosemar Batista da Silva / Banca: Amauri Hassui / Banca: Manoel Cleber de Sampaio Alves / O Programa de Pós Graduação em Ciência e Tecnologia de Materiais, PostMat, tem caráter institucional e integra as atividades de pesquisa em materiais de diversos campi / Resumo: A presente tese propõe dar uma contribuição para o estudo de aplicação de fluido de corte no processo de retificação centerless de passagem, comparando os efeitos causados em termos de integridade da peça retificada entre a técnica convencional e a técnica aprimorada desenvolvida para o uso racional dos fluidos de corte. As condições testadas foram as seguintes: retificação centerless de passagem utilizando rebolo de corte convencional (C120TB24), três condições de lubrirefrigeração, bocal convencional (BC), bocal multitubular utilizando emulsão (BME) e bocal multitubular utilizando simultaneamente emulsão e ar comprimido (BMEA). Vazão do ar comprimido 170 L/min, vazões da emulsão: 10 L/min, 20 L/min, 30 L/min e 40 L/min e remoção de material de 0,03 mm e 0,10 mm. As variáveis de saída estudadas foram a rugosidade da superfície retificada, o desvio de circularidade e a tensão residual. Além disso, foram realizadas análise metalográfica, análise por partículas magnéticas e ataque químico com ácido nítrico da superfície retificada a fim de identificar a ocorrência de danos térmicos. Em relação às três técnicas de aplicação de fluido de corte utilizados (BC, BME e BMEA) no processo de retificação centerless passagem, em geral, observou-se um melhor desempenho com a utilização do novo conceito de bocal multitubular desenvolvido. As melhores condições de retificação foram observadas utilizando o BMEA para as vazões de 30 L/min e 40 L/min e com o BME para vazão de 30 L/min, removendo 0,03 mm de material. Para essas condições o processo foi capaz de garantir a integridade das peças, pois não apresentam danos térmicos às superfícies retificadas e mantiveram-se os valores dos desvios de circularidade e rugosidade superficial recomendados para o processo de retificação. O método convencional (BC)... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: This work aims to contribute to the study and application of cutting fluid in the process of through-feed centerless grinding, comparing the effects in terms of workpiece integrity between the conventional technique and the improved technique developed for the rational use of cutting fluids. The test conditions were as follows: through-feed centerless grinding using silicon carbide resinoid grinding wheel (C120 TB24), three conditions of lubri-refrigeration, conventional nozzle (BC), multi-tube nozzle with emulsion (BME) and multitube nozzle with emulsion and compressed air simultaneously (BMEA). Compressed air flow rate 170 L/min, emulsion flow rate: 10 L/min, 20 L/min, 30 L/min, 40 L / min and material removal from 0,03 mm to 0,10mm. The output variables studied were the roughness of the ground surface, roundness deviation and residual stress. Additionally, metallographic analysis were performed as well as chemical attack with nitric acid on the ground surface in oder to identify the occurrence of thermal damage. Regarding the three techniques of cutting fluid application (BC, BME and BMEA0 in the process of through-feed centerless grinding, in general we observed a better performance when using the new concept of developed multi-tube nozzle. The best grinding conditions were observed using BMEA for the flow ratesn of 30 L/min and 40 L/min and with BME for the rate of 30 L / min, removing 0,03 mm of material. Fo these conditions the process was able to ensure workpiece integrity, since there were not thermal damage to the surface that were ground and the deviation values of roundness and surface roughness recommended for the grinding process were kept. The conventional method (BC) showed thermal damage in the layer that was ground for all conditions tested and the residual stress values of the ground... (Complete abstract click electronic access below) / Doutor

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