锻压技术

基于Autoform的后背门外板冲压开裂分析

英文标题：Stamping crack analysis on rear door outer panel based on Autoform

作者：魏绍东1 2 韩龙帅1 2 桑贺1 2 李晓林1 2 陈炜煊1 2 陈洪生3

单位：1.首钢集团有限公司技术研究院 2.绿色可循环钢铁流程北京市重点试验室 3.首钢京唐钢铁联合有限责任公司制造部

分类号：TG386.3+2

出版年,卷(期):页码：2023,48(3):99-104

摘要：

基于冲压成形仿真软件Autoform对某车型后背门外板冲压过程进行模拟仿真，分析了压边力、润滑、料厚及模具间隙等因素对拉延筋圆角减薄率的影响，并基于分析结果解决了拉延筋圆角冲压开裂的问题。结果显示，零件减薄率随着压边力的增加而增加，但拉延筋圆角处减薄率随着压边力的增加而减小，压边力在1400～2000 kN之间时，拉延筋圆角处减薄率可保持在19.1%之内；拉延筋圆角处减薄率随着摩擦因数的减小而增加，当摩擦因数为0.11时减薄率达到19.6%；料厚由0.63 mm增加至0.67 mm时，拉延筋圆角处减薄率由16.0%减小至13.4%；模具间隙对拉延筋圆角开裂的影响最为显著，当模具间隙为0.02 mm时，减薄率达到25.5%。故适当提升压边力和摩擦因数、增加料厚、减小模具间隙均可降低拉延筋圆角处减薄率。

Based on the stamping simulation software Autoform, the stamping process of rear door outer panel for a certain vehicle was simulated, and the influences of blank holder force, lubrication, material thickness and die clearance on the thinning rate of drawbead fillet were analyzed. Then, the problem of stamping crack for drawbead fillet was solved based on the analysis results. The results show that the thinning rate of part increases with the increasing of blank holder force, but the thinning rate at the drawbead fillet decreases with the increasing of blank holder force. When the blank holder force is between 1400 and 2000 kN, the thinning rate at the drawbead fillet can remain within 19.1%, and the thinning rate at the drawbead fillet increases with the decreasing of friction factor. When the friction factor is 0.11, the thinning rate reaches 19.6%, and when the material thickness increases from 0.63 mm to 0.67 mm, the thinning rate at the drawbead fillet decreases from 16.0% to 13.4%. The influence of die clearance on the drawbead fillet cracking is the most significant. When the die clearance is 0.02 mm, the thinning rate reaches 25.5%. Therefore, appropriately increasing the blank holder force, friction factor and material thickness and reducing the die clearance can all reduce the thinning rate of drawbead fillet.

基金项目：

作者简介：魏绍东（1994-），男，硕士，工程师 E-mail：weisd4991@163.com

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