锻压技术

旋转挤压过程中凸模结构参数对成形质量的影响

英文标题：Influence of punch structure parameters on forming quality during rotary extrusion

作者：吴耀金何金龙陈喆张治民李国俊薛勇

单位：中北大学

分类号：TG379

出版年,卷(期):页码：2019,44(3):65-71

摘要：

在Deform-3D有限元模拟过程中采用正交实验的设计方法，系统研究了双工作带凸模不同迎流面形态参数对AZ80镁合金内环高筋筒体旋转挤压过程中折叠与成形损伤的影响规律。结果表明：在变形温度为380 ℃，模具温度为410 ℃，变形速率为0.5 mm·s-1，摩擦系数为0.3的成形条件下，张开角α对折叠角γ有显著影响，但对损伤值的影响不显著；倾斜角β和倒角半径R对折叠角和损伤值的影响不显著。综合考虑，当迎流面相关参数分别为：张开角α为90°、倾斜角β为 8°、倒角半径R为3 mm时，所得构件凹槽的相关性能最佳。同时，按照优化后的工艺参数进行了物理实验，证实了数值模拟的可靠性。

The influences of different flow-surface morphology parameters of double working belt punch on the fold defects and forming damage in the rotary extrusion of AZ80 magnesium alloy cylinder with inner ring ribs were systematically analyzed by the orthogonal experimental design method in the simulation process of software Deform-3D. The results show that when the deformation temperature is 380 ℃, the mold temperature is 410 ℃, the deformation rate is 0.5 mm·s-1, the friction coefficient is 0.3, the opening angle α has a significant effect on the folding angle γ, but the effect on the magnitude of the damage value is not significant, and the inclination angle β and the chamfering radius R have no significant effect on the size of the folding angle and the magnitude of the damage value. In summary, when the relevant parameters of the flow-surface are opening angle α of 90°, inclination angle β of 8°, the chamfering radius R of 3 mm, the related performance of the component groove is the best. In the meanwhile, physical experiments are carried out according to the optimal technological parameters, and the reliability of numerical simulation is confirmed.

基金项目：

国家重点研究计划资助项目(2016YFB0301103)；山西省基础研究计划资助项目(201601D102018)

吴耀金(1975-)，男，博士，副教授，E-mail：wyj@nuc.edu.com；通讯作者：薛勇(1978-)，男，博士，教授，E-mail：YongXue395@163.com

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