Análise das vibrações no processo de torneamento interno da liga de alumínio 6351-T6

• Ano de defesa: 2017
• Autor(a) principal: Lara, Adriano Perpétuo de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Tecnológica Federal do Paraná; Curitiba; Brasil; Programa de Pós-Graduação em Engenharia Mecânica e de Materiais; UTFPR
• Palavras-chave em Português: Torneamento; Ligas de alumínio; Metais - Corte; Usinagem; Ferramentas para cortar metais; Engenharia mecânica; Lathing; Aluminum alloys; Metal-cutting; Machining; Metal-cutting tools; Mechanical engineering; CNPQ::ENGENHARIAS::ENGENHARIA MECANICA::PROCESSOS DE FABRICACAO; Engenharia Mecânica
• Link de acesso: http://repositorio.utfpr.edu.br/jspui/handle/1/2984

This work aims to analyze the vibrations in the boring process using a tool holder with high overhang. Tools with high overhang are susceptible to the occurrence of regenerative vibrations during machining, altering the dynamic stability of the process and generating an undesired surface finish. Tests performed to obtain data were made using measuring equipment such as microphone and platform for measuring forces. The proposal was to analyze the influence of machining parameters such as cutting speed and depth of cut in the dynamic stability of the aluminium alloy 6351-T6 boring process. For this purpose, the data generated in the process stability chart was used. Simulations were performed in the Matlab software using a previous model and compared with the experimental results. For the analysis of the data collected were used a microphone, a signal acquisition board, a microcomputer and a software for analysis, the ITA-Toolbox .In the end, the results showed that the depth of cut and the cutting speed have great influence on the vibration and on the stability of the boring process. Low cutting speeds provide greater cut depth of cut due to the damping effect. The results showed that this phenomenon begins to be significant when the relation between the frequency of vibration and the frequency of rotation is of approximately 30 and increases considerably to a ratio of 60. The results also showed that for depths of cut below the tool nose radius has unstable cuts but according to the models in the literature, for a value sufficiently below the depth of cut the process is always stable.