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首页> 外文期刊>Journal of Materials Engineering and Performance >Investigation on Effects of Die Orifice Layout on Three-Hole Porthole Extrusion of Aluminum Alloy 6063 Tubes
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Investigation on Effects of Die Orifice Layout on Three-Hole Porthole Extrusion of Aluminum Alloy 6063 Tubes

机译：模具孔口布局对铝合金6063管三孔舷窗挤压的影响研究

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摘要

Currently, with the increasing demand of high production output, much attention is paid to the research and development of multi-hole extrusion die. However, owing to the complexity of multi-hole porthole extrusion technology, it has not been applied widely in practice for the production of aluminum profiles, especially for porthole die with an odd number of die orifices. The purpose of this study is to design a three-hole porthole die for producing an aluminum tube and to optimize the location of die orifices based on computer-aided design and engineering. First, three-hole extrusion dies for different locations of die orifices are designed. Then, extrusion processes with different multi-hole porthole dies are simulated by means of HyperXtrude. Through numerical simulation, metal flow, temperature distribution, welding pressure, extrusion load, and die stress, etc. could be obtained, and the effects of the location of die orifices on extrusion process are investigated. With the increasing distance between die orifice and extrusion center (described as eccentricity ratio), metal flow becomes nonhomogeneous, and twisting or bending deformation of profile occurs, but the welding pressure rises, which improves the welding quality of profiles. However, the required extrusion force, billet and die temperature, die displacement, and stress induce no significant changes. In comparison with the extrusion force during single-hole porthole extrusion, there is 18.5% decrease of extrusion force during three-hole porthole extrusion. Finally, design rules for this kind of multi-hole extrusion dies are summarized.
机译：当前，随着高产量的需求的增加，多孔挤压模具的研究和开发引起了人们的广泛关注。然而，由于多孔孔道挤压技术的复杂性，它在实践中尚未广泛地用于铝型材的生产，特别是对于具有奇数模孔的孔道模具。这项研究的目的是基于计算机辅助设计和工程设计一种用于生产铝管的三孔舷窗模具，并优化模具孔口的位置。首先，针对模具孔的不同位置设计了三孔挤出模具。然后，通过HyperXtrude模拟具有不同多孔孔道模具的挤压过程。通过数值模拟，可以获得金属流动，温度分布，焊接压力，挤压载荷和模具应力等，并研究了模具孔口位置​​对挤压过程的影响。随着模孔和挤压中心之间距离的增加（称为偏心率），金属流动变得不均匀，并且型材发生扭曲或弯曲变形，但是焊接压力升高，从而提高了型材的焊接质量。但是，所需的挤压力，坯料和模具温度，模具位移和应力不会引起明显变化。与单孔舷窗挤压时的挤压力相比，三孔舷窗挤压时的挤压力降低了18.5％。最后，总结了这种多孔挤压模具的设计规则。

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