锻压技术

基于响应面的汽车中立柱内板影响因素多目标优化

英文标题：Multi-objective optimization on influencing factors for central pillar inner plate of automobile based on response surface

作者：王钊魏鑫黄瑶王雷刚

单位：江苏大学

关键词：中立柱内板拉延最优拉丁超立方实验设计响应面多目标优化

分类号：TG386.3

出版年,卷(期):页码：2020,45(7):46-50

摘要：

以某汽车中立柱内板为研究对象，选取摩擦系数、冲压速度、压边力和凸凹模间隙为设计变量，采用最优拉丁超立方实验设计选取了30组实验方案，使用Autoform R6软件对拉延后的最大增厚率和最大减薄率进行有限元模拟。利用模拟结果建立最大增厚率和最大减薄率两个目标值的4阶响应面近似模型，并分析了影响因素对目标值的影响。多目标优化后得到的摩擦系数为0.17、冲压速度为3500 mm·s-1、压边力为450 kN、凸凹模间隙为0.55 mm，此时的最大增厚率为0.95%、最大减薄率为10.65%。使用优化后的工艺参数进行模拟，得到的最大增厚率和最大减薄率的模拟值分别为0.96%和12.20%，证明了多目标优化结果的有效性。根据优化后的工艺参数组合进行零件试生产，可以生产出无起皱开裂且满足要求的汽车中立柱内板拉延件，提高了零件从设计至生产的效率。

For the inner plate of a automobile′s central pillar, taking the friction coefficient,

stamping speed, blank holder force and clearance between punch and die as the design variables, thirty experimental schemes were selected by the optimal Latin hypercube test design, and the maximum thickening rate and the maximum thinning rate after drawing were simulated by software Autoform R6. Then, the fourth-order response surface approximate model of two target values for the maximum thickening rate and the maximum thinning rate was established by the simulation results, and the influences of influencing factors on the target values were analyzed. After multi-objective optimization, the friction coefficient was 0.17, the stamping speed was 3500 mm·s-1, the blank holder force was 450 kN, the clearance between punch and die was 0.55 mm,under these process parametens, the maximum thickening rate was 0.95% and the maximum thinning rate was 10.65%. However, the simulated values of the maximum thickening rate and the maximum thinning rate obtained by the simulation with the optimized process parameters were 0.96% and 12.20% respectively to prove the effectiveness of multi-objective optimization results. According to the combination of optimized process parameters, the trial production of parts was conducted, the drawing parts of inner plate for automobile′s central pillar were produced without wrinkle and cracking to meet the requirements, which improved the efficiency of parts from design to production.

基金项目：

国家自然科学基金资助项目（51775249）

王钊（1994-），男，硕士研究生 E-mail：1138673857@qq.com 通讯作者：王雷刚（1963-），男，博士，教授，博士生导师 E-mail：lgwang@ujs.edu.cn

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