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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。
The reasonable structure parameter range of the cup-shaped component was analyzed. Rigid-plastic finite element method was used to simulate the process of reverse extrusion of AZ80 magnesium alloy punch. The load-stroke curve and blank strain distribution of the extrusion process were analyzed. The effects of rotational extrusion speed on the forming process The influence of rotary extrusion technology and traditional anti-extrusion process were compared. The results show that the rotary extrusion deformation is more severe than that of the conventional reverse extrusion. The higher the axial rotation speed is, the smaller the axial speed is, the smaller the required limit load is. The larger the equivalent strain is, the more uniform the deformation is.