基于正交试验的汽车引擎盖外板成形工艺参数优化

Optimization of forming process parameters for automobile engine cover based on orthogonal experiment

对汽车引擎盖外板的成形工艺参数进行研究,借助Dynaform软件对其成形过程进行模拟。基于正交试验方法对压边力、摩擦系数、冲压速度、凸凹模间隙这4个工艺参数进行优化,得出了最佳的成形方案,最终零件的最大变薄率为27.52%,最大变厚率为9.48%。在仿真及正交优化的基础上进行了实际的拉深试模,得出零件的成形性能与有限元模拟结果一致。研究结果表明,基于正交试验法对冲压成形工艺参数优化是可行的,能够缩短产品试模周期,提高成形质量。

The process parameters of automobile engine cover forming were studied,and the forming process was simulated by Dynaform.Then,the blank holder force,friction coefficient,punching speed and the gap between punch and die were optimized,and the optimum forming scheme was given with the maximum thinning rate 27. 52% and the maximum thickness rate 9. 48%. Furthermore,the actual drawing test was conducted based on simulation and orthogonal optimization,and the forming property was consistent with the finite element modeling results. The research results show that the optimization of stamping process parameters is feasible based on the orthogonal experiment method,and it can shorten the testing period and improve the forming quality of product.