期刊论文

中文

锻压技术

1000-3940

2017

42

9

30-34

10.13330/j.issn.1000-3940.2017.09.006

湖南省教育厅资助科研项目（138145） 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

本校为第一机构

以22MnB5高强度钢U形件为例,建立B柱热冲压有限元模型,并通过Deform-3D软件对热冲压过程进行数值模拟。设定保压结束后U形件的最大减薄率以及最大温差作为评价指标,基于数值模拟和3因素5水平正交实验方法,分析了在多指标因素不同水平下冷却系统参数对保压结束后U形件的最大减薄率以及最大温差大小和分布规律的影响,获得参数的优化组合:冷却管道直径为Φ8.5 mm,两管道孔中心间距为30 mm,管道孔中心与模具型面距离为13 mm。通过热冲压实验,得到保压结束后U形件的最大温差为124.5 ℃,最大减薄率为4.73%,验证了优化参数组合的有效性,为热冲压模具冷却系统设计优化提供了理论参考。

For U - shaped part of high - strength steel 22MnB5, a finite element model of hot stamping for B-pillar was established, and the hot stamping process was simulated by Deform software. Then, the maximum thinning ratio and the maximum temperature difference of U-shaped part after holding pressure process were set as evaluation indexes, and the influences of cooling system parameters on their size and distribution were analyzed under different levels of the multi-index factors based on the numerical simulation and orthogonal experiment with three...