锻压技术

基于Dynaform的22MnB5高强度钢热冲压仿真

英文标题：Simulation on hot stamping of high strength steel 22MnB5 based on Dynaform

作者：张立强刘婷郑文慧胡豪仲志刚

分类号：TG306

出版年,卷(期):页码：2015,40(8):34-40

摘要：

有限元分析是热冲压成形过程中节约成本的必要手段，然而，计算机数值仿真的精确性对于材料模型和边界条件有着很强的依赖关系。以高强钢22MnB5为研究对象，通过热模拟实验和成形过程中工件与模具之间的热分析来准确获得材料模型和热边界条件，从而提高热冲压成形过程数值仿真精度，为热冲压成形零件质量控制提供参考。仿真结果表明，热冲压变形过程中板料减薄率变化分布不均匀，板料减薄率最大值出现在侧壁靠近法兰圆角处，而法兰与底部减薄率则较小，仿真结果与实验结果基本吻合，验证了热冲压仿真的正确性与可靠性。

The finite element analysis is an essential step for the sake of cost saving when designing hot stamping processes. The quality of the numerical simulation results is strongly dependent on the accuracy of material model and boundary conditions used in FE models. For the high strength steel 22MnB5, the material model and thermal boundary conditions were obtained from thermal simulation experiments and thermal analysis between the part and the die during hot stamping, and after that the accuracy of numerical simulation was improved. Therefore, these provide references for the quality control of hot stamping parts. The numerical simulation results show that the thickness reduction rates of sheet metal are in uneven distribution during hot stamping. The maximum thickness reduction rate occurs on the sidewall of the part nearby the flange billet. However, the thickness reduction rates are smaller in the flange and the bottom. The simulation result is in good agreement with the experimental result. Furthermore, the validity and reliability of the hot stamping simulation are verified.

基金项目：

湖南省教育厅资助科研项目(13B145)；湖南省大学生研究性学习和创新性实验计划项目；湖南省高校科技创新团队支持计划资助

张立强（1978-），男，博士，副教授

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