Diss.--Technische Hochschule, Hannover. / Bibliography: p. 9-13.

Diss.--Technische Hochschule, Hannover. / Bibliography: p. 9-13. Also issued online.

No description available.

Diss.--Technische Hochschule, Hannover. / Bibliography: p. 9-13.

Thesis (M.S.) -- Worcester Polytechnic Institute. / Keywords: Threshold Forces; Vibrations; Signal Processing; Force Adaptive Grinding; Diamond Roll Dressing. Includes bibliographical references (p. 29 ).

Thesis (Ph. D.)--University of Wisconsin--Madison, 1970. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

No description available.

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1994. / Vita. Abstract. One map in back pocket. Includes bibliographical references (leaves 73-75). Also available via the Internet.

Orientador: Eduardo Carlos Bianchi / Banca: Hamilton José de Mello / Banca: Carlos Elias da Silva Junior / Resumo: Com o desenvolvimento da indústria metal-mecânica e a crescente demanda por formas mais ecológicas de utilização e manutenção dos recursos naturais, tem-se a meta de utilizar e gerar menos resíduos que sejam nocivos ao meio-ambiente, bem como aos seres humanos. Isso se aplica aos processos de usinagem, nos quais se procuram por fontes alternativas de lubrificação, as quais reduzam os malefícios gerados ao ecossistema. Seguindo essa vertente tem-se a técnica de mínima quantidade de lubrificação - MQL, a qual preza por uma maior eficiência do processo ao utilizar menos fluido se comparada com o uso de líquidos refrigerantes em abundância. Porém, a utilização de MQL demanda certos cuidados no que se refere à limpeza da zona de corte, e às trocas de calor do sistema ferramenta-peça. Portanto, o presente trabalho analisou o comportamento da técnica de MQL associada à limpeza, onde foram utilizados três tipos de fluidos: Rocol Biocut 9000 fluido próprio para a aplicação na técnica de MQL, Quimatic Tapmatic ME-2: fluido sintético, normalmente utilizado na refrigeração convencional, mas que tende a ter resultados bons na utilização em MQL e um terceiro fluido VCI Aqua 180: fluido com propriedades anticorrosivas e com inibidor de empastamento. Todos os fluidos foram diluídos nas proporções 1:5 ou seja uma parte de óleo e cinco partes de água (83% de diluição em agua), 1:10 ou seja uma parte de óleo e dez partes de água (90,90% de diluição em agua) além do óleo puro. Dessa forma, foram... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: With the development of the metal-mechanic industry and the growing demand for more ecological ways of using and maintaining natural resources, the goal is to use and generate less waste that is harmful to the environment as well as to humans. This applies to machining processes in which alternative sources of lubrication are sought, which reduce the damage to the ecosystem. Following this strand is the technique of minimum amount of lubrication - MQL, which values a greater efficiency of the process when using less fluid when compared with the use of abundant soft liquids. However, the use of MQL requires certain care regarding the cleaning of the cutting zone, and the heat exchanges of the tool-part system. Therefore, the present work analyzed the behavior of the MQL technique associated to cleaning, where three types of fluids were used: Rocol Biocut 9000 suitable for the application in the MQL technique, Quimatic Tapmatic ME-2: synthetic fluid, normally used in refrigeration conventional but which tends to have good results in the use in MQL and a third VCI Aqua 180 fluid: fluid with anticorrosive properties and with impasto inhibitor. All the fluids were diluted 1: 5 in either one part oil and five parts water (83% dilution in water), 1:10 or one part oil and ten parts water (90.90% dilution in water) plus pure oil. In this way, process output variables were analyzed, such as roughness, circularity deviation, G ratio (volume of removed material / volume of worn grinding ... (Complete abstract click electronic access below) / Mestre

This work addresses the advanced probabilistic modeling of the stochastic nature of microgrinding in the machining of high-aspect ratio, ceramic micro-features. The heightened sensitivity of such high-fidelity workpieces to excessive grit cutting force drives a need for improved stochastic modeling. Statistical propagation is used to generate a comprehensive analytic probabilistic model for static wheel topography. Numerical simulation and measurement of microgrinding wheels show the model accurately predicts the stochastic nature of the topography when exact wheel specifications are known. Investigation into the statistical scale affects associated microgrinding wheels shows that the decreasing number of abrasives in the wheel increases the relative statistical variability in the wheel topography although variability in the wheel concentration number dominates the source of variance. An in situ microgrinding wheel measurement technique is developed to aid in the calibration of the process model to improve on the inaccuracy caused by wheel specification error. A probabilistic model is generated for straight traverse and infeed microgrinding dynamic wheel topography. Infeed microgrinding was shown to provide a method of measuring individual grit cutting forces with constant undeformed chip thickness within the grind zone. Measurements of the dynamic wheel topography in infeed microgrinding verified the accuracy of the probabilistic model.