Transactions of Materials and Heat Treatment

Title：Stamping crack analysis on rear door outer panel based on Autoform

Authors： Wei Shaodong1 2 Han Longshuai1 2 Sang He1 2 Li Xiaolin1 2 Chen Weixuan1 2 Chen Hongsheng3

Unit： 1.Technical Research Institute of Shougang Group Co. Ltd. 2.Beijing Key Laboratory of Green and Recyclable Steel Process 3.Manufacturing Department of Shougang Jingtang Iron and Steel United Co. Ltd.

KeyWords： stamping rear door outer panel fillet cracking thinning rate drawbead

ClassificationCode：TG386.3+2

year,vol(issue):pagenumber：2023,48(3):99-104

Abstract：

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.

Funds：

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

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