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首页> 外文会议>International Conference on Metal Forming >Bridge Design Influences on the Pressure Conditions in the Welding Chamber for Porthole Die Extrusion
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Bridge Design Influences on the Pressure Conditions in the Welding Chamber for Porthole Die Extrusion

机译：桥梁设计对舷窗模具挤出的焊接室压力条件的影响

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Porthole die extrusion of lightweight alloys is used for the production of profiles, which may have complex cross section geometries. The mechanical properties of these profiles are deeply affected by the seam welds, which are generated in hollow profiles along the whole length. The seam welds result from the rejoining of the material streams in the welding chamber of the porthole die. The joining phase and hence the seam weld quality are strongly influenced by the temperature and the pressure conditions in the welding chamber. Those process conditions can be adjusted by a proper die design.In this work, the focus lies on the feeder section of the extrusion die, which consists of a set of bridges, whose shapes influence the material entry in the welding chamber. A numerical study was carried out to investigate different bridge shapes with regard to the pressure inside the welding chamber and the punch load. Subsequently, the volume of the bridge was fixed to isolate and better investigate the influence of the shape. It was observed that bridge designs leading to higher flow distortion cause higher pressure decrement along the welding plane and, consequently, degradation of the welding conditions.
机译：轻质合金的舷窗模具挤出用于生产型材，其可能具有复杂的横截面几何形状。这些型材的机械性能受到焊缝焊缝的深受影响，沿着整个长度在中空型材中产生。接缝焊缝由孔孔模具的焊接室中的材料流重新加入材料。连接阶段和因此接缝焊缝质量受到焊接室中的温度和压力条件的强烈影响。这些工艺条件可以通过适当的模具设计调节。在这项工作中，焦点位于挤出模具的馈电部分上，该挤压模具包括一组桥梁，其形状影响焊接室中的材料进入。进行了数值研究，以研究焊接室内的压力和冲头负载的不同桥形状。随后，桥的体积被固定以隔离并且更好地研究形状的影响。观察到桥梁设计导致较高的流动变形导致沿焊接平面的压力减小，因此，焊接条件的劣化。

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