Effect of extrusion stem speed on extrusion process for a hollow aluminum profile |
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Authors: | Cunsheng Zhang Guoqun Zhao Zhiren Chen Hao Chen Fujun Kou |
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Affiliation: | 1. Key Laboratory for Liquid–Solid Structural Evolution & Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong 250061, PR China;2. State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China;3. CSR Qingdao Sifang Co., Ltd, Qingdao, Shandong 266111, PR China |
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Abstract: | Extrusion stem speed is one of important process parameters during aluminum profile extrusion, which directly influences the profile quality and choice of extrusion equipments. In this paper, the extrusion process of a thin-walled hollow aluminum profile was simulated by means of the HyperXtrude commercial software. Through a serial of numerical simulation, the effects of stem speed on extrusion process, such as metal flow behavior at die exit, temperature distribution, extrusion force, and welding pressure, have been investigated. The numerical results showed that there existed an optimum value of stem speed for flow velocity distribution. With the increasing stem speed, the temperature of the extrudate and required extrusion force increased, and the welding quality of extrudate would be improved. Through comprehensive comparison and analysis, the appropriate stem speed could be determined for practical extrusion production. Thus, the research results could give effective guideline for determining initial billet and die temperature and choosing the proper extrusion press in aluminum profile industry. |
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Keywords: | Aluminum profile extrusion Velocity relative difference (VRD) Arbitrary Lagrangian&ndash Eulerian (ALE) HyperXtrude |
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