Transactions of Materials and Heat Treatment

Title：Optimization on wrinkle and crack at corner of A-pillar reinforcement panel in thermoforming

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ClassificationCode：TG386.1

year,vol(issue):pagenumber：2021,46(3):105-110

Abstract：

The optimization method of wrinkle and crack at the corner of A-pillar reinforcement panel for automobile ultra-high strength boron steel was studied. The analysis model was created by CAE simulation software AutoForm, and the simulation analysis of thermoforming process was conducted. The analysis results show that it is easy to produce crack and wrinkle at the corner of A-pillar reinforcement panel. Therefore, the reasons caused the wrinkle and crack were analyzed emphatically, and it was believed that the unreasonable product structure and poor process addendum were the main reasons for the wrinkle and crack at the corner. Furthermore, from the aspects of product structure, process addendum and blank sizes, the formability at the corner of A-pillar reinforcement panel were effectively solved by the multiple optimization analysis. According to the optimal plan, the die structure in the thermoforming process was designed and manufactured by casting, machining and polishing to satisfy the design requirement, and the on-site commissioning was conducted. The commissioning results were consistent with the previous CAE analysis results. The research results show that the previous CAE optimization analysis results can effectively guide the production and commissioning on site, the formability at the corner are solved, and the qualified product is produced finally to reduce development costs and cycles of part.

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尤彬波（1989-），男，学士，中级工程师 E-mail：youbinbo@gacrnd.com

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