基于HyperXtrude的大型空心铝型材挤压模具优化

Optimization on extrusion mold for large hollow aluminum profile based on HyperXtrude

挤压模具在铝型材生产中起着关键的作用,合理的模具设计对于挤压出高质量的铝型材至关重要。以分流组合模挤压大型空心铝型材为研究对象,分析了型材的工艺特点,建立了挤压模具的三维模型,采用基于任意拉格朗日-欧拉(Arbitrary Largrange-Euler, ALE)算法的HyperXtrude软件对铝型材挤压过程进行了数值模拟。针对初始模具模拟出现的金属流速严重不均的问题,设计了两次优化(阻流块结构修改和高度的调整)对铝型材挤压模具进行了修正。结果表明,优化后的挤压模具挤出了流速均匀且基本无变形的铝合金型材,有效地解决了因初始模具设计不合理而导致的金属流速不均的问题。

Extrusion molds play a key role in the production of aluminum profiles,and reasonable mold design is essential for extruding high-quality aluminum profiles.Therefore,for the large hollow aluminum profiles extruded by split-flow combined mold,the process characteristics of the profiles were analyzed,and the 3D model of the extrusion mold was established.Then,the extrusion process of aluminum profiles was numerically simulated by using software HyperXtrude based on Arbitrary Lagrange-Euler(ALE)algorithm,and aiming at the problem of serious uneven metal flow velocity in the initial mold simulation,two times of optimization(the modification of choke block structure and the adjustment of height)were designed to correct the extrusion mold for aluminum profile.The results show that the optimized extrusion mold extrudes the aluminum alloy profiles with uniform flow velocity and basically no deformation,which effectively solves the problem of uneven metal flow velocity caused by unreasonable initial mold design.