Aluminium Extrusion Weld Formation and Metal Flow Analysis in Hollow Profile Extrusions of Different Section Thickness

机译：铝挤出焊接和金属流分析在不同截面厚度的中空型材挤出中

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Hollow and semi-hollow profiles are commonly produced by extrusion using porthole dies. The main characteristics of such dies are the presence of a mandrel (core) to shape the inner contour of hollow profile and bridges or legs to carry the mandrel. The bridges split the billet material into multiple metal streams that flow through the porthole channels and meet in the welding chamber behind the bridge where they are joined by pressure welding. When hollow profiles with different wall thickness are made the size of two adjacent portholes may be different. The material then flows through the two portholes with different flow velocity so that there is more feed through the bigger porthole into the weld chamber behind the bridge.

机译：中空和半空心型材通常通过使用孔孔模具挤出来产生。这种模具的主要特征是存在心轴（芯），以塑造中空型材的内轮廓和桥梁或腿以携带心轴。桥梁将坯料材料分成多个金属流，该金属流流过舷窗通道，并在桥梁后面的焊接室中相遇，在那里它们通过压力焊接连接。当具有不同壁厚的空心轮廓使得两个相邻的泳孔的尺寸可以是不同的。然后，材料流过不同的流速的两个基波孔，使得通过更大的舷窗进入桥梁后面的焊接室。

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《International Conference on Extrusion and Benchmark》|2012年||共8页
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作者
Yawar Abbas Khan; Henry Sigvart Valberg;
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中图分类 TB3-532;
关键词
Hollow profile extrusion; Extrusion welds; Non-symmetric metal flow; Grid pattern;

机译：空心轮廓挤出;挤出焊缝;非对称金属流动;网格图案;

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Aluminium Extrusion Weld Formation and Metal Flow Analysis in Hollow Profile Extrusions of Different Section Thickness

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