Transactions of Materials and Heat Treatment

Title：Temperature influence analysis and control strategy for trunk outer panel forming

Authors： Liu Xiaozhuan Xu Jinbo Zhu Liang Yan Kang Wang Xiaokai Zhang Chi

Unit： Dongfeng Peugeot Citroen Automobile Company Ltd. Engineering Technology Associates Inc. China Branch

KeyWords： trunk outer panel stamping forming DYNAFORM thermal simulation friction heat

ClassificationCode：TG385

year,vol(issue):pagenumber：2018,43(8):65-70

Abstract：

There is a stability problem in the continuous production process of a trunk outer panel. First, the influences of temperature on properties of heat reactive baking hardening steel sheet were summarized, and then the influence of die temperature change in actual production on the forming resistance of material was analyzed by software DYNAFORM. The results show that the temperature causes the change of gap between blank holder and die in stretching process, which results in the stability problem. Furthermore，the main reasons affecting the temperature change of blank holder and blank were analyzed. The results show that the main factor of temperature change of blank holder is friction heat, however, the temperature change of blank is the result of combined action of deformation heat and friction heat. Finally, the temperature changes of blank holder and blank under different process parameters were analyzed. According to the analysis conclusion, a specific control strategy is formulated including reducing friction by chromium plating on punch, die and blank holder, increasing heat dissipation by adding blowing device and controlling thinning rate by reducing blank holder force, which successfully control the temperature in the acceptable range and realize stable production.

Funds：

刘晓专（1979-），男，本科，工程师，E-mail：liuxiaozhuan@126.com；通讯作者：徐金波（1977-），男，硕士，工程师，E-mail：jxu@eta.com.cn

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