Transactions of Materials and Heat Treatment

Title：Analysis and optimization design on hot stamping process for automobile B-pillar reinforcement plate based on AutoForm simulation

Authors： Liang Fazhou Zhong Shengtao

Unit： Department of Mechanical Engineering Science and Technology College of NCHU

KeyWords： B-pillar reinforcement plate wrinkling of flange edge hot stamping process edge-bead draw bead

ClassificationCode：TH162

year,vol(issue):pagenumber：2022,47(12):75-80

Abstract：

The hot stamping process of B-pillar reinforcement was simulated by software AutoForm, and for the phenomenon of wrinkling in analysis process, the causes of wrinkling were analyzed. Then, the die surface of part was adjusted and optimized, and the problems of wrinkling at the flange edge for B-pillar and local thinning of the side wall were solved by adding edge-bead and draw bead at the flange edge and optimizing the pressing gap value of lower die pressing plate. Furthermore, the results were optimized and designed by comparing the analysis results before and after optimization, and the best design scheme was chosen. Through analysis and optimization, the drawing simulation was carried out by using the process parameters that the pressing force of upper die pressing plate in the big end of B-pillar is 60 kN, the pressing force of middle pressing plate is 20 kN, the pressing gap of lower die pressing plate is 1.4 mm, the holding pressure is 3000 kN and the holding time of 7 s. The parts are obtained without cracking and wrinkling defects, and the surface quality is good, which meets the requirements of process and effectively shortens the development cycle and cost of die.

Funds：

江西省教育厅科技项目（GJJ218703）

梁发周（1975-），男，硕士，讲师 E-mail：471057366@qq.com

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