摘要
切削加工是一种重要的金属制造工艺 ,其中切屑成形是一种典型的大变形问题 ,它涉及到材料非线性、几何非线性以及边界非线性问题 ,在高速切削加工过程中 ,还会涉及到热力耦合问题。本文针对典型的正交切削工艺 ,建立了平面应变模型 ,工件采用了弹塑性材料模型 ,而刀具采用的是考虑温度变化的刚性材料模型。利用商业化软件DEFORM-2 D,对所建立的模型进行了有限元分析 ,得到了切屑成形、温度分布、切削力变化以及残余应力等结果。将部分结果与文献中介绍的实验结果做了比较 。
Cutting is an important manufacturing process o f metal. The chip formation in metal cutting is one of the typical large deforma tion problems, which involves material nonlinearity, geometrical nonlinearity an d boundary nonlinearity, and thermal-mechanical coupling. In this paper, a plan e strain model is built to simulate orthogonal cutting, where workpiece is treat ed as elasto-plastic model, and the cutting tool is treated as rigid model. The above FEM model is analyzed by commercial software DEFORM-2D, and some results including the chip formation, temperature distribution, cutting force variable and residual stress were obtained. Simulation results are in agreement with prev ious experiment results.
出处
《机械科学与技术》
CSCD
北大核心
2003年第4期641-645,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目 ( 50 1750 6 0 )资助
关键词
正交切削
弹塑性变形
热力耦合
有限元
Orthogonal cutting
Elaso-plasticity deformatio n
Thermal-mechanical coupling
FEM
