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

被引：33
|
作者：
Yi, Jie [1 ,2 ]
Wang, Zhen-hu [1 ]
Liu, Zhi-wen [1 ,3 ]
Zhang, Jian-ming [1 ,2 ]
He, Xin [1 ]
机构：
[1] Hunan Univ, State Key Lab Adv Design & Manufacture Vehicle Bo, Changsha 410082, Hunan, Peoples R China
[2] Hunan Ind Polytech, Sch Mech Engn, Changsha 410208, Hunan, Peoples R China
[3] Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2018年 / 28卷 / 10期
基金：
中国国家自然科学基金;
关键词：
hollow aluminium profile; extrusion defect; metal flow velocity; baffle plate; ALE algorithm; WELD SEAM DEFECTS; NUMERICAL-SIMULATION; ALLOY; DESIGN; SPEED; TUBE;
D O I：
10.1016/S1003-6326(18)64853-8
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
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 porthole die structure was optimized by adding baffle plates. After optimization, maximum displacement in the Y direction at the bottom of profile decreases from 1.1 to 0.15 mm, and the concave defects are remarkably improved. The research method provides an effective guidance for improving extrusion defects and optimizing the metal flow of complex hollow aluminium profiles during porthole die extrusion.
引用
收藏
页码：2094 / 2101
页数：8
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