Transactions of Materials and Heat Treatment

Title：Influences of welding angle and welding chamber depth on the extrusion quality of hollow aluminum profile with complex cantilever

Authors： Zeng Wenhao Wei Gang Deng Xiaoliang Chen Gong

Unit： Xihua University

KeyWords： long cantilever aluminium profile extrusion welding angle welding chamber depth numerical simulation

ClassificationCode：TG376

year,vol(issue):pagenumber：2017,42(6):92-100

Abstract：

Based on finite element analysis software HyperXtrude, the influences of welding angle α and welding chamber depth h on extrusion forming quality for a hollow section aluminum profile with long cantilever structure were investigated. The results indicate that the metal flow velocity under port bridges around profile cantilever and hollow section is high, and the metal welding starts early and has a long time when α ranges from 15° to 45°. Then, the metal flow velocity of corresponding region decreases obviously and the metal welding delays when α is up to 60°. While it becomes the most serious when α increases to 90°, and the metal welding time becomes short. Meanwhile, the maximum offset of mandrel reaches the minimum values 0.045 mm when α is 45°. Furthermore, the minimum hydrostatic pressure on the welding plane, the maximum equivalent stress of upper die and the
maximum offset of mandrel have the similar incremental trends with the increase of welding depth h. The optimal welding angle of 45° and welding chamber depth of 20 mm were determined by considering influences of each factor comprehensively. According to the optimal scheme, the extrusion die is designed. It is found that the simulation results and the experimental results fit well by extrusion trial, and the comprehensive quality of the extruded profile is high.

Funds：

四川省科技支撑计划项目(16201401)

曾文浩(1991-)，男，硕士研究生魏刚(1971-)，男，博士，教授

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