期刊论文

FE analysis of extrusion defect and optimization of metal flow in porthole die for complex hollow aluminium profile

Liu, Zhi-wen

英文

中国有色金属学报(英文版)

1003-6326

2018

28

10

2094-2101

10.1016/S1003-6326(18)64853-8

Project(U1664252)supported by the National Natural Science Foundation of China Projects(31665004,31715011)supported by the Open Fund of State Key Laboratory of Advanced Design and Manufacture for Vehicle Body,China。

本校为通讯机构

To solve the defects of bottom concave appearing in the extrusion experiments of complex hollow aluminium profiles, a 3D finite element model for simulating steady-state porthole die extrusion process was established based on HyperXtrude software using Arbitrary Lagrangian–Eulerian (ALE) algorithm. The velocity distribution on the cross-section of the extrudate at the die exit and pressure distribution at different heights in the welding chamber were quantitatively analyzed. To obtain an uniformity of metal flow velocity at the die exit, the p...

为了解决复杂空心铝型材在挤压试验中出现的截面内凹缺陷,基于Arbitrary Lagrangian-Eulerian (ALE)算法,利用HyperXtrude软件平台建立型材在多孔分流挤压模具挤压过程中的三维稳态有限元模型。定量分析型材挤压出口不同方向的金属流速及焊合室内不同高度的压力分布。为实现出模口型材横截面材料流速的均匀性,采用增加阻流块方法对模具结构进行优化。优化后进行挤压试验,型材底面Y方向的最大位移由1.1 mm减小到0.15 mm,内凹缺陷得到显著改善。研究方法为复杂空心铝型材分流模挤压缺陷的改善和材料流动行为的优化提供理论指导。