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Abstract：
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For the wrinkling in two positions of an MPV car roof rear during the actual production, the main causes of wrinkles were obtained by analyzing the die structure and the original production process, combining with the tracking investigation of on-site production situation and simulating the production process of stamping parts by CAE software, and the optimization process of wrinkles in the roof rear was formulated according to the wrinkle causes of the two positions. In the process of previous process, the work hardening occurred at R angle of process surface, and in the subsequent process of shaping, the shape of hardened part could not be restored to flatness resulting in surface wrinkling defect. Thus, by eliminating work hardening, the matching of loading for parts and the accuracy of car body were improved to avoid the rapid wear of punch and die surfaces caused by wrinkling and stacking materials in stamping process of roof so as to improve the service life of die.
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Funds：
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国家科技重大专项（2014ZX04002041）
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AuthorIntro：
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高双明（1989-），男，学士，工程师，E-mail：1381033@163.com
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Reference：
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