# 45钢高速切削锯齿形切屑关键技术的有限元模拟Study on the Critical Technology of Finite Element Simulation of Serrated Chip

DOI: 10.12677/MET.2017.61011, PDF, HTML, XML, 下载: 1,096  浏览: 3,116  科研立项经费支持

Abstract: The finite element simulation is one of the important methods for the study of serrated chip in high speed cutting. It is significant for revealing the mechanism of high speed machining and optimizing the cutting parameters. In this paper, based on the general finite element software ABAQUS and the finite element model of serrated chip of 45 steel in high speed cutting, the critical technologies, such as the geometry model, material model, friction model and mass scaling are investigated. The results show that: In the process of building the finite element geometry model of serrated chip, using the work-piece geometry model with 45˚ angle can better overcome the influence of grid distortion and obtain a better simulation result. The parameters of material model have great influence on the simulation results. The simulation results using different constitutive relationship obtained from different experiment method and conditions have great difference. The friction coefficient also has great influence on the simulation results. For the 45 steel, when the friction coefficient is taken as 0.3, the simulation result is better. The mass scaling is valid for the finite element simulation of serrated chip. An appropriate mass scaling coefficient can be guaranteed to save the time cost in the condition of obtaining the accuracy simulation results.

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