高强钢热冲压温度场数值模拟及关联度分析

Numerical Simulation and Correlation Analysis of High Strength Steel Hot Stamping Temperature Field

以平板件为研究对象,基于Abaqus对热冲压成形过程中的板料及模具温度场进行数值模拟研究。基于正交试验的关联度分析,计算出了工艺参数对成形件最大温差、凸凹模最高温度影响趋势的量化值。结果表明:成形件温度分布呈梯度分布,高温区在成形件心部,次边缘及边缘区域温度依次递减;而模具温度分布与板料相反。淬火时间对成形件最大温差、凸凹模温度影响趋势的量化值为0.5874、0.7555、0.7602,板料初始温度对成形件最大温差、凸凹模温度影响趋势的量化值为0.5781、0.7268、0.7339,保压压力对成形件最大温差、凸凹模温度影响趋势的量化值为0.5105、0.6791、0.6828。根据量化值得到淬火时间对成形件最大温差、凸凹模温度的影响最显著,其次是板料初始温度及保压压力。为选取与优化热冲压工艺参数提供了参考。

Taking the flat plate as the research object, based on Abaqus, the numerical simulation of the sheet and mold temperature field in the hot stamping process was carried out. Based on the analysis of the correlation degree of the orthogonal test, the quantified values of the parameters＇ influence on the maximum temperature difference of the formed part and the maximum temperature of the die were calculated. The results show that the temperature distribution of the forming part is in a gradient distribution, and the high temperature area is in the core, sub edge and edge area of forming components decreases in turn, while the temperature distribution of the die is opposite to the forming components. It provides a reference for selecting and optimizing parameters during hot stamping process.