锻压技术

汽车B柱零件热冲压软区模具模面优化设计

英文标题：Optimization on die surface design of soft zone in hot stamping process for automobile B-pillar part

分类号：TG386

出版年,卷(期):页码：2019,44(4):138-144

摘要：

B柱软区模具处于高温工况条件下，由于热膨胀作用模具模面会产生较大热变形，因此，需要进行模面优化补偿。建立了B柱软区模具传热有限元仿真模型，基于Isight软件并应用MMFD优化算法，以模面温度为优化目标，调整了3组加热棒功率，使模具模面温度达到生产标准。应用加热棒功率参数，建立了模具热应力有限元模型，模拟发现模具模面产生较大热膨胀变形。以B柱零件的膨胀量为基准，设计模具模面优化流程，经过两次模面补偿，模具模面达到精度要求。按照设计的模具模面制作模具并进行实验，结果表明，模具传热仿真结果准确，生产的零件达到精度要求。

The hot stamping die of soft zone for automobile B-pillar is under the condition of high temperature, and the die surface needs to be optimized and compensated due to the large thermal deformation on the die surface caused by thermal expansion. Therefore, a heat transfer finite element simulation model of soft zone die for B-pillar was established, and the die surface temperature reached the production standard based on software Isight and optimization algorithm MMFD by taking the die surface temperature as the optimized target and adjusting the heating rod power of three groups. Furthermore, the thermal-stress finite element model of die was established by applying the power parameters of heating rod. And the simulation results show that the large thermal expansion deformation occurs on the die surface. Based on the expansion amount of B-pillar part, the die surface optimization process was designed. After two times of die surface compensation, the die surface reaches the precision requirement. The die was made and tested according to the designed die surface. The results show that the finite element simulation result of die heat transfer is correct, and the produced B-pillar part meets the requirement of accuracy.

基金项目：

国家自然科学基金面上项目（1575346）

马治军（1988-），男，本科，工程师 E-mail：zhijun.ma@ssdt.com.cn 通讯作者：唐鼎（1979-），男，博士，副研究员，博士生导师 E-mail：tangding@sjtu.edu.cn

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