基于综合设计的覆盖件冲压工艺优化

Process optimization of panel stamping based on integrated design

针对正交实验设计方法的不足,提出结合正交实验设计和响应面模型(等径设计)的综合设计方法。以汽车行李箱盖的冲压拉延过程为例,进行冲压工艺优化设计。选择拉延筋、摩擦系数(凹模与板料、凸模与板料)、压边力、凸凹模间隙、冲压速度为实验的6因素,每个因素选取3水平,以最小减薄率为质量评价标准,进行综合设计,获得了各因素对最大减薄率的影响规律,得到了最优的关键工艺参数。并利用最优值进行了数值模拟仿真,验证了方法的可行性与实用性。

Aiming at the shortage of the orthogonal experimental design, the integrated design method was proposed combining the orthogonal experimental design and response surface model （equal-diameter design）. Taking the stamping drawing process of the automobile panel-liftgate as an example, stamping process was optimized. Six factors were selected： draw-bead, friction （die and blank, punch and blank）, binder force, clearance between punch and die, drawing velocity. Every factor was set to three levels. The integrated design was done by setting the minimum rate of thinning as the quality evaluation criteria. With the design, the effect of various parameters on the the minimum rate of thinning was studied , and the optimal critical parameters were obtained. The feasibility and practicability of the method were proved by numerical simulation with the optimal value.