Journal of the Korean Society for Precision Engineering (한국정밀공학회지)
- Volume 15 Issue 10
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- Pages.128-139
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- 1998
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- 1225-9071(pISSN)
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- 2287-8769(eISSN)
A Finite Element Analysis for the Characteristics of Temperature and Stress in Micro-machining Considering the Size Effect
크기효과가 고려된 미소절삭시의 온도 및 응력특성에 관한 유한요소해석
Abstract
In this paper, a finite element method for predicting the temperature and stress distributions in micro-machining is presented. The work material is oxygen-free-high-conductivity copper(OFHC copper) and its flow stress is taken as a function of strain, strain rate and temperature in order to reflect realistic behavior in machining process. From the simulation, a lot of information on the micro-machining process can be obtained; cutting force, cutting temperature, chip shape, distributions of temperature and stress, etc. The calculated cutting force was found to agree with the experiment result with the consideration of friction characteristics on chip-tool contact region. Because of considering the tool edge radius, this cutting model using the finite element method can analyze the micro-machining with the very small depth of cut, almost the same size of tool edge radius, and can observe the 'size effect' characteristic. Also the effects of temperature and friction on micro-machining were investigated.