Welding process of aluminum alloy car body chassis for subway
An aluminum alloy car body and welding process technology, applied in the field of aluminum alloy welding, can solve the problems of large residual stress after welding, large gap between welds, welding deformation, etc., shorten the relative length of the weld, improve the accuracy of the weld, The effect of improving welding performance
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[0050] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0051] As shown in the figure, the welding process of the aluminum alloy car body chassis for the subway in this embodiment mainly includes the following steps:
[0052] A. The bottom frame is installed:
[0053] 1) Fix the corbel 1 and the anchor 2 on the underframe assembly welding tooling, align the center of the anchor 2 and the corbel 1, and perform spot-fixing; in order to facilitate the welding of other welds, after the spot-fixing is completed, you can Cut the part where the lower cover plate is connected to the corbel.
[0054] 2) Fit the two side beams 3 correspondingly to both sides of the corbel 1 on the formal tooling, adjust the position of the side beams 3 and press them tightly.
[0055] 3) Preheat the welding seam 15HV between the connecting beam on the traction 2 and the corbel 1 and weld, the preheating temperature is 8...
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