Transactions of Materials and Heat Treatment

Title：Research on invalidation of wrinkling evaluation indicator in stamping simulation of an automobile front door inner panel

Authors： Shen Danfeng1 Nie Xin2 Qin Chaosheng1 Li Kaiwen3 Wang Lizhu3 Chen Yina3 Wei Qingfeng3

Unit： 1. AISN Auto R&D Co. Ltd. 2.Hunan University 3. SAIC-GM-Wuling Automotive Co. Ltd.

KeyWords： automobile front door inner panel stamping wrinkle evaluation indicator wrinkling height

ClassificationCode：TG394

year,vol(issue):pagenumber：2023,48(2):68-76

Abstract：

For the wrinkle defects in the drawing process of automobile front door inner panel, the causes of wrinkles were investigated by fish-bone analysis method, the stamping simulation in the previous process design stage was reviewed, and the simulation and actual inflow situations were obtained as the same basically. Then, the drawing process of front door inner panel was evaluated by the wrinkling evaluation indicators of stamping simulation, such as wrinkling trend, surface defect height, process analysis and formability, and it was found that the about wrinkling evaluation indicators had invalidation situation in the flat area of product. Furthermore, in view of this situation, the wrinkling height Δ was introduced and related to the contact height between sheet and upper die, and the wrinkle of stamping parts was quantified and classified by three thresholds of 3%, 5% and 10% of sheet thickness. At the same time, the setting of stamping simulation parameters was optimized, and the wrinkling evaluation indicator and process for the flat area of product were proposed. Finally, through engineering verification, the wrinkling evaluation indicator and process were effective for the wrinkling evaluation of the flat area of product.

Funds：

国家重点研发计划（2021YFB2501800）；湖南省自然科学基金面上项目（2020JJ4196）；柳州市科技计划重大专项（柳科攻2022ABB0101、2021CBA0101）

作者简介：申丹凤（1981-），女，硕士，高级工程师，E-mail：dandaner325@163.com

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