锻压技术

基于AutoForm的汽车门内板轮弧面起皱的优化

英文标题：Optimization on arc surface wrinkle for automobile rear door inner panel based on AutoForm

作者：洪国华

单位：北汽(广州)汽车有限公司

分类号：TG385.4

出版年,卷(期):页码：2018,43(8):71-74

摘要：

为了解决某车型后车门内板零件轮弧面的起皱缺陷，通过对零件进行冲压工艺分析，确定了在弧面增加工艺凸包的改进工艺。运用CAE技术，确定了合理的冲压方向，设计了拉延模面，建立了三维弹塑性有限元模型，并对左后门内板零件的拉延成形过程进行了数值模拟，获得了改进工艺后零件的成形极限云图、减薄率云图、轮弧面起皱准则云图、轮弧面及底部安装面的厚度变化云图，并进行分析。最后通过工程实验对模拟进行了验证，结果表明：数值模拟结果与实验结果相符，即通过在左后门内板零件轮弧面增加工艺凸包，能够消除弧面处的起皱缺陷。

In order to solve the arc surface wrinkle defect of automobile rear door inner panel，the stamping process of part was analyzed, and the optimized process of adding process convex hull in the arc surface was determined. Then, the proper stamping direction was determined, and the drawing die surface was designed by CAE technology. Furthermore, the three-dimensional elastic-plastic finite element model was established, and the drawing process of left rear door inner panel was numerically simulated. Finally, the forming limit nephogram, the reduction nephogram, the wrinkle criterion nephogram of arc surface, the thickness nephogram of arc surface and installation face in the bottom of parts after process improvement were obtained and analyzed, and the simulation was verified by engineering experiment. The results show that the numerical simulation results are consistent with the experimental results, and the wrinkle defect of arc surface is eliminated by adding process convex hull in the arc surface of left rear door inner panel.

基金项目：

洪国华（1987-），男，硕士 E-mail：hong_guohua@yeah.net

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