Transactions of Materials and Heat Treatment

Title：Variable blank holder force stamping technology for automotive shield part based on FEM

Authors： Wang Ya

Unit： Puyang Vocational and Technical College Henan University

KeyWords： blank holder force orthogonal test grey correlation theory maximum thinning rate maximum thickening rate forming load

ClassificationCode：TG386.2

year,vol(issue):pagenumber：2022,47(8):41-46

Abstract：

For an automotive shield part, the influences of two kinds of loading modes for constant blank holder force and variable blank holder force on stamping were studied by Deform finite element software, and considering the two indexes of shield quality and die life, the optimization objective function was established by combing with grey correlation theory. Then, at the same time, the orthogonal test method was adopted, and the blank holder force of upper die at five different positions (press amount of 0, 10, 20, 30 and 40 mm) was taken as the test variables, the test research at different levels was carried out, and the optimal loading mode of variable blank holder force was obtained by range analysis method. The simulation results show that compared with the constant blank holder force loading mode, the variable blank holder force loading mode is more conducive to sheet metal flow, the probability of defects is smaller, the forming quality of stamping parts is better, and the die life is longer under the same conditions, namely, the maximum thinning rate of stamping parts is reduced to 22.85%, the maximum thickening rate is reduced to 7.85%, and the forming load is reduced to 488 kN. The stamping test shows that the quality of shield parts is stable and can be mass produced, and the maximum thinning rate and the maximum thickening rate are 23.00% and 8.05% respectively.

Funds：

河南省高校创新人才计划（2021PYCXRC01）

作者简介：王亚（1981-），男，学士，讲师，E-mail：wangya198102@163.com

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