Method of manufacturing inserted aluminum pipe welded joint
A welding joint and plug-in technology, which is applied in the direction of welding equipment, welding equipment, welding medium, etc., can solve the problems of high activation temperature, low welding efficiency, complicated brazing process, etc., and achieve increased working pressure and roundness , limit the effect of splash overflow
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specific Embodiment 1
[0019] refer to figure 1 , one embodiment of the present invention is: select the hard aluminum tube 2 and the soft aluminum tube 12 with the same outer diameter, and process the welding part of the hard aluminum tube 2 tube end into a shape with an outer diameter slightly smaller than the inner diameter of the soft aluminum tube 12 To weld the tapered surface, a welding mandrel 1 is preliminarily placed inside the hard aluminum tube 2, and the hard aluminum tube 2 together with the welding mandrel 1 is placed on the moving electrode 3 of the internal pressure resistance pressure welding machine. The end of the soft aluminum tube 12 is not further processed, and the wall thickness and diameter are kept as they are. The soft aluminum tube 12 is placed on the fixed electrode 5 of the internal pressure resistance pressure welding machine. In order to improve the welding quality, titanium alloy mosaic pieces 4 are inlaid on the fixed electrode 5 and the moving electrode 3 respecti...
specific Embodiment 2
[0020] refer to figure 2 , the tapered welding surface of the hard aluminum tube 2 can also be in the shape of a broken line such as figure 2 In middle 10, the diameter d of the broken line should be slightly larger than the inner diameter of the soft aluminum tube 12, which reduces the resistance of the soft aluminum tube to the insertion of the hard aluminum tube, helps prevent the deformation and instability of the hard aluminum tube, and forms a two-stage fusion Weld seam, and improve welding fusion area and quality.
[0021] The welded joint of the aluminum pipe prepared by the above method has a wave-shaped concave-convex pattern on the surface of the soft aluminum pipe of the welded joint, referred to as the wave pattern.
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