锻压技术

基于响应面法的汽车后轮罩工艺参数优化

英文标题：Optimization on process parameters for automobile rear wheel cover based on response surface method

作者：魏鑫1 王雷刚1 王钊1 潘书华2

分类号：TG386.3

出版年,卷(期):页码：2021,46(10):70-77

摘要：

以某汽车后轮罩作为研究对象，采用响应面法对冲压工艺参数进行优化。选取压边力、拉延筋阻力系数、摩擦因数、凸凹模间隙为工艺参数变量，优化目标为拉延工序最大减薄率和修边工序后最大回弹量。采用Box-Behnken法设计响应曲面试验，建立工艺参数与拉延工序最大减薄率和修边工序后最大回弹量之间的响应面模型；通过响应面模型优化得到的压边力为350 kN、拉延筋阻力系数为0.40、摩擦因数为0.13、凸凹模间隙为0.6 mm。采用经过优化的参数组合模拟得到的拉延工序最大减薄率和修边工序后最大回弹量的误差分别为0.5%和0.2%，可用于替代有限元模型进行计算。根据最优工艺参数组合指导模面回弹补偿并进行试生产，可以生产出满足质量要求的汽车后轮罩。

For the automobile rear wheel cover, the stamping process parameters were optimized by the response surface method. Then, the blank holder force, resistance coefficient of drawbead, friction factor and clearance between punch and die were selected as the process parameter variables, and the optimization goals are the maximum thinning rate in the drawing process and the maximum springback amount after the trimming process. Furthermore, the response surface test was designed by Box-Behnken method, and the response surface model between the process parameters and the maximum thinning rate in the drawing process and the maximum springback amount after the trimming process was established. Through the optimization of the response surface model, the blank holder force was 350 kN, the resistance coefficient of drawbead was 0.40, the friction factor was 0.13, and the clearance between punch and die was 0.6 mm. And the errores of the maximum thinning rate in the drawing process and the maximum springback amount after the trimming process was 0.5% and 0.2% respectively, which were obtained by the optimized parameters combination simulation, which can replace the finite element model to calculate. According to the optimal process parameters combination, the die surface springback compensation was guided and the trial production was conducted, which could produce the automobile rear wheel cover meeting the quality requirements.

基金项目：

国家自然科学基金资助项目（51775249）

作者简介：魏鑫（1996-），男，硕士研究生 E-mail：451099074@qq.com 通信作者：王雷刚（1963-），男，博士，教授 E-mail：lgwang@ujs.edu.cn

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