AZ80镁合金杯形构件冲头旋转反挤压成形有限元模拟

FE Simulation of Rotating Punch Backward Extrusion Forming for AZ80 Magnesium Alloy Cup

分析了旋转挤压成形的杯形构件的合理结构参数范围。采用刚塑性有限元法,对AZ80镁合金冲头旋转反挤压成形过程进行了数值模拟,分析了旋转挤压过程的载荷—行程曲线和坯料应变的分布,探讨了旋转挤压速度对成形过程的影响,并将旋转挤压成形技术与传统反挤压成形过程进行了对比研究。结果表明:与传统反挤压成形相比,旋转挤压变形更为剧烈,绕轴旋转速度越大、轴向速度越小,所需极限载荷越小,等效应变越大,变形越均匀。

Reasonable structure parameters of rotating punch extrusion forming cup components were analyzed. The rotating punch backward extrusion forming process of AZ80 magnesium alloy was numerically simulated. The load-stroke curve of rotating punch extrusion process and the distribution of strain of the blank were analyzed. The effect of the rotating punch extrusion speed on the backward extrusion process was discussed. The rotating punch extrusion forming technology was compared with the traditional backward extrusion technology. The results show that rotating punch extrusion deformation is severer compared with the traditional backward extrusion process. And the greater the axis rotation speed is and the smaller the axial velocity is, the smaller the required limit load is, the greater the effective strain is, and the more uniform the deformation is.