Transactions of Materials and Heat Treatment

Title：Numerical simulation of hot stamping and parameter study of die cooling system

Authors： He Yujun Xie Yanmin Tian Yin Sun Xinqiang

Unit： Southwest Jiaotong University

KeyWords： high-strength steel hot stamping numerical simulation cooling system

ClassificationCode：TG386

year,vol(issue):pagenumber：2015,40(11):148-154

Abstract：

In order to understand the hot stamping process clearly, and to improve parts and tools cooling capacity during hot stamping, the hot forming and cooling process of high-strength steel were numerically simulated, and parameters in die cooling system were studied. An elastic-plastic finite element model based on thermal-mechanical coupled method was set up by the software ABAQUS, and the hot forming and cooling process of U-shaped part of high-strength steel sheet 22MnB5 were numerically simulated. The simulation results were compared with the experiment data, and the effectiveness of the finite element model was verified. Parts highest temperature, parts maximum temperature difference and tools highest temperature were selected as targets, and the grey correlation degree about flow rate of the cooling water and geometric parameter of cooling duct on the tool were analyzed through orthogonal experimental design and grey relational analysis. The analysis results indicate that the rank of importance of these three goals are the cooling pipe diameter, the distance of cooling pipe to the die surface, the distance between pipes and the flow velocity of the cooling water.

Funds：

国家自然科学基金资助项目（51275431）

何育军（1991-），男，硕士研究生谢延敏（1975-），男，博士，副教授

Reference：

［1］Liu H S, Xing Z W, Bao J. Investigation of the hot-stamping process for advanced high-strength steel sheet by numerical simulation[J]. Journal of Materials Engineering and Performance, 2010,19: 325-334.
［2］Bakri Abdul Hay, Brahim Bourouga, Christine Dessain. Thermal contact resistance estimation at the blank/tool interface: experimental approach to simulate the blank cooling during the hot stamping process [J]. Int. J. Mater. Form., 2010,（3）:147-163.
［3］Merkleinm M, Lechler J, Geigerm M. Characterisation of the flow properties of the quenchenable ultra high strength steel22MnB5 [J]. Annals of the CIRP, 2006, 55(1): 1-4.
［4］Hoffmann H,So H, Steinbeiss H. Design of hot stamping tools with cooling system[J]. Annals of the CIRP,2007,56(1)：269-272.
［5］刘红生，包军，邢忠文，等.高强度钢热冲压成形热力耦合数值模拟[J].材料科学与工艺，2010，18(4)：459-463.Liu H S, Bao J, Xing Z W, et al. Numerical simulation on channel shape hot stamping of 22MnB5 high-strength sheet metal based on thermo-mechanical coupled method [J]. Meterials Science & Technology, 2010, 18(4): 459-463.
［6］林建平，王立影，田浩彬，等.超高强度钢热流变行为[J]. 塑性工程学报，2009,16(2):180-183.Lin J P, Wang L Y, Tian H B, et al. Research on hot forming behavior of ultrahigh strength steel [J]. Journal of Plasticity Engineering, 2009,16(2):180-183.
［7］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.
［8］刘庄. 热处理过程的数值模拟[M]. 北京：科学出版社，1996.Liu Z. Numerical Simulation for the Process of Heat Treatment [M]. Beijing: Science Press, 1996.
［9］李烨. 热成形模具冷却系统优化设计[D]. 大连：大连理工大学，2013.Li Y. The Optimization Design of Cooling System in Hot Stamping Dies [D]. Dalian: Dalian University of Technology，2013.
［10］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 Stamping of Ultra High Strength Steels [D]. Dalian: Dalian University of Technology, 2013.
［11］苌群峰. 镁合金板材温热冲压成形理论与实验研究[D]. 上海：上海交通大学，2007.Chang Q F. Theoretical and Experimental Investigation of Warm Forming of Magnesium Alloy Sheet [D]. Shanghai: Shanghai Jiao Tong University, 2007.
［12］Holman J P. Heat Transfer [M]. 10th Edition. New York: McGraw-Hill, 2010.
［13］谢延敏. 基于Kriging模型和灰色关联分析的板料成形工艺稳健优化设计研究[D]. 上海：上海交通大学，2007.Xie Y M. Research on Robust Optimization of Sheet Metal Forming Based on Kriging and Grey Relational Analysis [D]. Shanghai: Shanghai Jiao Tong University, 2007.
［14］赵海明.热成形模具冷却系统数值模拟分析[D].长春：吉林大学，2013.Zhao H M. Numerical Simulation of Cooling System of Hot Stamping Die [D].Changchun: Jilin University，2013.
［15］Merklein M, Lechler J. Determination of material and process characteristics for hot stamping processes of quench enable ultra high strength steels with respect to a FE-based process design [J]. SAE International Journal of Materials & Manufacturing, 2009, 1(1): 411-426.

Service：

【This site has not yet opened Download Service】【Add Favorite】