Eventos Anais de eventos
COBEF 2021
11th Brazilian Congress on Manufacturing Engineering
Analysis of vibrations in the internal turning process of aluminum 6351-T6
Submission Author:
Adriano Perpétuo de Lara , PR , Brazil
Co-Authors:
Adriano Perpétuo de Lara, Marcio Avelar, Milton Polli
Presenter: Adriano Perpétuo de Lara
doi://10.26678/ABCM.COBEF2021.COB21-0263
Abstract
This paper aims to analyze the vibrations in the internal turning process using a tool with high length/diameter ratio. Tools with high overhang length are susceptible to regenerative vibrations during machining, changing the dynamic stability of the process and generating an undesirable surface finish. The proposal was to analyze the influence of machining parameters such as rotation and depth of cut on the dynamic stability of the internal turning process of the 6351-T6 aluminum alloy. For this, the data generated in the elaboration of the stability chart of the process was used. Simulations were carried out in the Matlab software using a pre-set model and comparing with the experimental results obtained. Low cutting speeds provide greater cut depths 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 nose radius of the tool has unstable cuts, although the models in the literature state that for a value sufficiently below the depth of cut the process is always stable.
Keywords
chatter vibration, regenerative vibrations, internal turning process, aluminum alloy
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