锻压技术

某侧围外板冲击线的优化方案

英文标题：Optimization scheme of impact line for a lateral outer panel

作者：张海洲崔礼春余冰定

关键词：侧围外板冲压工艺冲击线镶块 CAE

分类号：TG386

出版年,卷(期):页码：2019,44(1):43-47

摘要：

基于有限元分析软件Autoform，对某侧围外板的冲压成形过程进行了模拟分析及评价，并对是否会产生冲击线进行预判，阐述了冲击线的产生机理。针对该侧围外板B柱后侧壁产生的冲击线，通过将后侧法兰面根部圆角半径由R5 mm增大至R8 mm、将侧壁拔模角由6°增大至11.3°的措施，使冲击线高度由74.38 mm降低至70.9 mm；另外，对产生冲击线缺陷区域的拉延凹模采用镶块结构，并且镶块采用高温回火且配合间隙要求＜0.03 mm。通过现场模具调试，生产出合格的冲压件，B柱后侧壁无明显冲击线痕迹、手摸无阻滞感，涂装后整车光感效果良好。

Based on the finite element analysis software Autoform, the stamping process of a lateral outer panel was analyzed and evaluated. Then, whether it would produce an impact line was predicted, and the mechanism of impact line was explained. For the impact line generated on the Bpillar rear wall of the lateral outer panel, the impact line height was reduced from 74.38 mm to 70.9 mm by increasing the corner radius of back flange face root from R5 mm to R8 mm and increasing the draft angle of side wall from 6° to 11.3°. In addition, the drawing die for the region producing impact line defect adopted insert structure，and the insert was tempered at high temperature with matching clearance requirements <0.03 mm. Through the onsite die debugging, the qualified stamping parts were produced without obvious impact line marks on the Bpillar rear wall, and the hand touch was unblocked. After painting, the vehicle shows a good light effect.

基金项目：

国家科技重大专项（2014ZX04002041）

张海洲（1987-），男，学士，工程师，E-mail：8wy2190166@163.com

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