中文摘要：

在热冲压成形过程中,为更进一步认识热冲压成形过程,提高零件冷却性能和模具自身冷却能力,数值模拟了高强钢板料的热冲压成形和淬火过程,并对模具冷却系统参数做了研究。运用ABAQUS建立了基于热力耦合的弹塑性有限元模型,数值模拟了22MnB5高强钢板U型件的热冲压成形和淬火过程,并将数值仿真结果与试验结果对比,验证了数值仿真模型的有效性。通过正交试验设计和灰色关联分析,以成形件最高温度、成形件最大温差、模具最高温度为目标,对模具冷却系统中冷却水流速和管道孔几何参数进行了灰色关联分析。分析结果表明,对上述3个目标影响重要度依次是冷却管道孔径、冷却管到模具表面距离、管道间距、水流速度。

英文摘要：

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 22 MnB5 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.