基于Dynaform的轮罩拉延工艺优化

为实现轮罩拉延成形工艺的优化，用Dynaform对某轮罩的拉延成形进行数值仿真。对压边力、冲压速度、模具间隙、摩擦因数以及拉延筋阻力等影响成形质量的工艺参数进行正交试验设计，对最大减薄率和起皱率2个质量评价指标设计不同的加权系数进行综合加权评分，并对在3种加权系数组合下的3种综合加权评分进行极差分析，找出最优的加权系数组合和因素水平组合。结果表明，采用优化后的工艺参数和加权系数进行仿真可得到较优的成形质量。

Dynaform-based Optimization of Drawing Process for Wheel Cover Panel

To optimize wheel cover drawing process, the drawing forming of automobile wheel cowling was numerical simulated on Dynaform. We designed orthogonal experiments about various process parameters, which influence the forming quality, such as blank holder force, punch velocity, die clearance, friction coefficient and draw bead restraining force. And we comprehensively weighted evaluated the maximum thinning rate and wrinkling rate. We analyzed the range of three kinds of comprehensively weighted score with three different combinations of combination weighted coefficients and found out the optimal combinations of weighted coefficients and factor level. The results show that the quality of the drawing forming can be improved if the processing parameters are optimized.