Transactions of Materials and Heat Treatment

Title：Optimization on cooling system in the hot stamping based on Deform

Authors： Zou Wei Zhang Liqiang

Unit： Central South University of Forestry and Technology Hunan Financial & Industrial Vocationnal-Technical College

KeyWords： hot stamping cooling system numerical simulation orthogonal experiment high-strergth steel U-shaped part

ClassificationCode：TG305

year,vol(issue):pagenumber：2017,42(9):30-34

Abstract：

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-factor and five-level. Finally, the optimal parameter combination was obtained with the pipeline diameter of Φ8.5 mm, the distance between two pipelines of 30 mm and the distance between the pipeline center and the die surface of 13 mm. The experimental results show that the maximum temperature difference of U-shaped part is 124.5 ℃, and the maximum thinning ratio is 4.73%. Thus, the feasibility of the optimal parameter combination is verified, and a theoretical reference is provided for the parameter design of cooling system in hot stamping dies.

Funds：

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

作者简介：邹伟(1991-)，男，学士，硕士研究生 E-mail：429606865@qq.com 通讯作者：张立强(1978-)，男，博士，副教授 E-mail：zlq2k1103@126.com

Reference：

［1］兰东东, 祁涛, 王祥. 高强度钢热成形模具冷却系统数值模拟[J]. 热加工工艺, 2014, 43(1): 132-133.

Lan D D, Qi T, Wang X. Numerical simulation of hot stamping die cooling system for high strength steel[J]. Hot Working Technology, 2014, 43(1): 132-133.

［2］许伟力, 艾健, 罗爱辉. 钢板热冲压新技术介绍[J]. 塑性工程学报, 2009, 16(4): 39-43.

Xu W L, Ai J, Luo A H. Introduction of sheet metal hot-forming[J]. Journal of Plasticity Engineering, 2009, 16(4): 39-43.

［3］Hoffmann H, So H, Steinbeiss H. Design of hot stamping tools with cooling system [J]. Annals of the CIRP, 2007, 56(1): 269-272.

［4］代尚军. 超高强度钢热成形模具冷却系统研究[D]. 长春: 吉林大学, 2014.

Dai S J. The Research on Hot Forming Tools Cooling System of HSS[D]. Changchun: Jilin University, 2014.

［5］于宏元. 车辆高强度钢板热冲压工艺改进研究及应用[D]. 大连: 大连理工大学, 2013.

Yu H Y. Research on Hot Forming Process Improvement of Automobile High Strength Steel and Its Application[D]. Dalian: Dalian University of Technology, 2013.

［6］Geiger M, Merklein M, Hoff C. Basic investigations on the hot stamping steel 22MnB5[J]. Advanced Materials Research, 2005, (6): 795-804.

［7］何育军, 谢延敏, 田银, 等. 热冲压成形数值仿真及模具冷却系统参数研[J]. 锻压技术, 2015, 40(11):148-154.

He Y J, Xie Y M, Tian Y, et al. Numerical simulation of hot stamping and parameter study of die cooling system[J]. Forging & Stamping Technology, 2015, 40(11):148-154.

［8］廖铮玮. 高强度钢热成形换热系数估算及试验研究[D]. 大连: 大连理工大学, 2013.

Liao Z W. Estimation and Experimental Study of Heat Transfer Coefficient in Hot Forming of Ultra High Strength Steels[D]. Dalian: Dalian University of Technology, 2013.

［9］Hay B A, Bourouga B, Dessain C. Thermal contact resistance estimation at the blank/tool interface: experimental approach to simulate the blank cooling during the hot stamping process[J]. International Journal of Material Forming, 2010, 3(3):147-163.

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