基于HyperXtrude的空心铝型材挤压模具结构的优化

Structure Optimization of Hollow Aluminum Extrusion Based on HyperXtrude

针对挤压时模具分流桥处应力过大容易导致模具失效的情况,进一步优化模具结构提高模具挤压时分流桥处的应力。利用有限元仿真软件HyperXtrude对一种空心铝型材挤压模具进行模拟挤压,得到挤出型材的挤出速度图、工作带处的静水压力图、流动应力图、温度分布图以及模芯处的应力分布与位移情况。根据模拟得到的结果对模具做拱形桥结构方面的改进,再次进行模拟挤压,模具的最大应力下降了17%左右,最终改善了模具挤压时的最大应力,延长了模具的使用寿命。

The die structure is further optimized to improve the situation that the stress at the split bridge of the die is too large during extrusion.The finite element simulation software HyperXtrude is used to simulate the extrusion of a hollow aluminum profile.The extrusion velocity diagram,hydrostatic pressure diagram,flow stress diagram,temperature distribution diagram and the stress distribution and displacement of the die core can be obtained.According to the simulation results,the arch bridge structure of the mold is improved.The maximum stress of the front and rear dies decreases by about 17%.Finally,the maximum stress during extrusion is improved and the service life of the die is extended.