Transactions of Materials and Heat Treatment

Title：Applications of mesh reconstruction technology in FEM simulation of porthole die extrusion for hollow Al-alloy profile

Authors： HUANG Dong-nan ZHANG Zhi-hao LI Jing-yuan XIE Jian-xin

Unit： University of Science and Technology Beijing Inner Mongolia University of Technology

KeyWords： hollow profile of Al-alloy porthole extrusion mesh reconstruction numerical simulation

ClassificationCode：TG379

year,vol(issue):pagenumber：2010,35(6):128-133

Abstract：

Applying the mesh reconstruction technology based on Deform-3D and Pro/Engineer software, taking the typical large and hollow Al-alloy industry profile as an example, the whole extrusion process (including welding process) was simulated. The results show that,using an enterprise's porthole die design,in the beginning of extrusion, the welding of the middle-welding plane is delayed compared with the two side-welding planes, which leads to the shortage of the metal in the middle of the profile cross section as well as the elastic offset of the mandrel which is apt to causing the size deviation of the profile thickness. In the stage of steady extrusion, the highest temperature near the die orifice is about 520 ℃，the hydrostatic pressure in welding chamber is about 5-10 times than the yield stress of A6005, the mandrel offset is about 0.43 mm, that means the extrusion temperature, welding quality and the thickness-size deviation meet the industry requirements.

Funds：

国家重点基础研究发展计划资助项目(2007CB613703)；材料成形与模具技术国家重点实验室开放课题研究基金(09\|01)

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