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为了满足汽车轻量化的要求,对超高强度钢板热成形进行了研究。利用ABAQUS软件建立了热力耦合模型,研究了模具初始温度、冲压速度对冲压过程板料厚度、应力应变的影响。结果表明:凸模圆角区最容易拉裂;随模具温度的增加,板料最小厚度先增加后减小;随冲压速度的增加板料最小厚度减小,且冲压速度对板料厚度变化影响更大。模拟结果与实验结果相符合,这能为实际冲压过程提供理论基础。
In order to meet the requirements of lightweight car, the thermoforming of ultra-high strength steel has been studied. The thermal coupling model was established by using ABAQUS software. The effects of initial mold temperature and pressing speed on the sheet thickness and stress-strain during stamping process were studied. The results show that the punch corner area is the most likely to crack. With the increase of the die temperature, the minimum thickness of the sheet increases first and then decreases. The minimum sheet thickness decreases with the increase of the stamping speed, and the influence of the stamping speed on the sheet thickness changes Bigger The simulation results are consistent with the experimental results, which can provide a theoretical basis for the actual stamping process.