冲压模具的结构变形分析及型面补偿技术

Structural deformation analysis and profile surface compensation technology for a stamping die

针对某款汽车发动机盖外板,采用钣金冲压仿真软件DYNAFORM对其冲压成形进行模拟仿真,获得模具与板料间的接触力信息;随后通过钣金冲压分析软件JSTAMP,将DYNAFORM中获得的壳体接触力映射到冲压模具实体结构网格上,对模具进行结构变形分析来获得模具型面的变形数据,再根据这些数据来制定和实施其型面补偿方案,得到更加合理的模具型面结构。在生产现场,对未实施型面补偿的模具和实施了型面补偿的模具的调试工作进行对比分析,统计各自的修模量及研合率调试时间。结果表明,使用该方法可达到提高模具研合率,减少修模工作量,实现缩短模具制造周期的目的。

For outer plate of a car engine cover,the stamping process was simulated by sheet metal punching simulation software DYNAFORM,and the contact forces between die and sheet were obtained. Then,the shell contact forces obtained by DYNAFORM were mapped to the structural grid of stamping die by sheet metal punching analysis software JSTAMP,and the structural deformation of die was analyzed to obtain the deformation data of die profile surface. Based on the above data,the compensation scheme of profile surface was designed and conducted,and more reasonable profile surface structure of die was obtained. Furthermore,at manufacturing site,the debugging work of dies with and without profile surface compensation were compared,and the die repair and debugging time of matching rate were measured. The result shows that the above method can improve the matching rate of die,decrease the die repair and also shorten the manufacturing cycle of the stamping die.