Transactions of Materials and Heat Treatment

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

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ClassificationCode：TG386

year,vol(issue):pagenumber：2019,44(4):138-144

Abstract：

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.

Funds：

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

Reference：

[1]Mori K, Bariani P F, Behrens B A, et al. Hot stamping of ultra-high strength steel parts [J]. CIRP Annals-Manufacturing Technology, 2017, 66(2): 755-777.

[2]包丽，蔡有杰，吴志东，等．变强度热冲压件数值仿真及其组织性能预测 [J]．塑性工程学报，2018，25 (2): 30-36．

Bao L，Cai Y J，Wu Z D，et al. Numerical simulation and microstructure properties prediction of hot stamping parts with variable strength [J]．Journal of Plasticity Engineering, 2018, 25 (2): 30-36．

[3]Merklein M, Wieland M, Lechner M, et al. Hot stamping of boron steel sheets with tailored properties: A review [J]. Journal of Materials Processing Technology, 2016, 228: 11-24.

[4]赵运运，李亨，李明，等. 汽车B柱高强度钢热冲压工艺 [J]. 锻压技术，2017，42（2）：66-71.

Zhao Y Y，Li H，Li M，et al. Hot stamping process of high-strength-steel for automotive B-pillar [J]. Forging & Stamping Technology，2017,42（2）：66-71.

[5]王敏，奚建胜，张春，等. 硼钢板热冲压过程马氏体相变预测 [J].塑性工程学报，2016，23（5）：120-124.

Wang M，Xi J S，Zhang C，et al. Prediction of martensitic transformation in hot forming of boron steel sheet [J]. Journal of Plasticity Engineering，2016，23（5）：120-124.

[6]谢晖，何全福，蒋浩民，等. 超高强钢板热成形模具的热力耦合分析 [J]. 热加工工艺，2014，43（23）：149-153.

Xie H，He Q F，Jiang H M，et al. Thermal-mechanical coupling analysis on hot forming die of ultra-high-strength steel sheet [J]. Hot Working Technology，2014，43（23）：149-153.

[7]何平，毛建中，宋建力. 铟镍合金特种条带冲压成形分析与模具设计[J]. 锻压技术，2017，42（4）：43-49.

He P，Mao J Z，Song J L. Analysis on stamping of special strap and die design for indium nickel alloys[J]. Forging & Stamping Technology，2017，42（4）：43-49.

[8]Mu Y H，Wang B Y，Zhou J，et al. Hot stamping of boron steel using partition heating for tailored properties: Experimental trials and numerical analysis [J]. Metallurgical and Materials Transactions A，2017，48(11)：5467-5479.

[9]Mu Y H，Wang B Y，Zhou J，et al. Heating parameters optimization of hot stamping by partition heating for tailored properties [J]. ISIJ International，2017，57：1442-1450.

[10]Mu Y H，Wang B Y，Zhou J，et al. Laboratory trials and design of industrial application of hot stamping of 22MnB5 tailored components by partition heating [J]. Procedia Manufacturing，2018，15：1103-1110.

[11]Mori K，Maeno T，Mongkolkaji K. Tailored die quenching of steel parts having strength distribution using bypass resistance heating in hot stamping [J]. Journal of Materials Processing Technology，2013，213(3)：508-514.

[12]赖宇阳. Isight参数优化理论与实例详解[M]. 北京：北京航空航天大学出版社，2012.

Lai Y Y. Parameter Optimization Theory and Example Explanation of Software Isight [M]. Beijing: Beihang University Press，2012.

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