Transactions of Materials and Heat Treatment

Title：Numerical simulation of hot stamping and mold wear of DP780 high strength steel plate for automobile

Authors： Zhang Qingyu

Unit： Henan Industry and Trade Vocational College

KeyWords： high strength steel plate hot stamping mold wear mold life orthogonal test

ClassificationCode：V216.5+3

year,vol(issue):pagenumber：2022,47(8):35-40

Abstract：

For DP780 high strength steel plate for automobile, with the help of Deform-3D simulation system, the hot stamping simulation model was established, and the deformation process and forming effect of DP780 high strength steel plate were analyzed. Based on the hot stamping wear theory, and taking the forming quality of DP780 high strength steel plate as the prerequisite, the wear condition of stamping mold was studied and improved. By using orthogonal test, a four factors and three levels simulation scheme about steel plate temperature, mold clearance, stamping speed and friction coefficient was established. The double objective optimization problem of punch and die wear was simplified to a single objective optimization problem about correlation degree by grey correlation method. Finally, the optimal solution of each variable in the interval was determined by range analysis method. The simulation results show that after optimization, the punch wear is reduced by 31.61% and the die wear is reduced by 24.98%. According to the actual stamping results, DP780 high strength steel plate has good forming effect, good quality and no defects, and the stamping mold life is close to the predicted results. The reference value of the finite element simulation is high, and the optimization method has certain guidance to the actual production.

Funds：

河南省高新技术领域科技攻关项目（182102210097）

作者简介：张清郁（1981-），男，硕士，副教授，E-mail：rongrong1015@yeah.net

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