先进高强钢冲压模具压边圈结构疲劳分析与优化

Fatigue analysis and optimization on the binder structure of stamping die for advanced high strength steels

在车身结构件中大量采用先进高强钢,是实现汽车轻量化主要途径之一,同时也给模具强度和模具材料带来了新的挑战。基于ANSYS有限元软件平台,对拉深模冲压过程进行有限元仿真,获得了不同时刻压边圈结构应力分布状况。根据有限元分析的结果,对压边圈结构进行了疲劳分析,预测了压边圈结构的疲劳寿命。基于有限元分析和疲劳分析的结果,并结合工程设计经验对压边圈结构进行优化,有效地减小了冲压过程中的压边圈结构的应力,提高了压边圈疲劳寿命。

The extensive application of advanced high strength steels in automobile manufac-turing is one of the main ways to reduce the body weight.It also requires the high strength and anti-fatigue properties of the stamping dies.In this paper,drawing process is simulated with the FEM software ANSYS,and the stress distribution on binder is calculated in different stamping stage.Based on the simulation result,fatigue analysis is conducted and the life of binder can be predicted.Optimization is proposed on the basis of the engineering experience and FEA simulation.It shows that the stress reduces in the optimized binder structure and the die life is enhanced.