How to control the deformation of square tube
Aug 19,2024
1. The usual deformation of square pipe welding is corrected by fire attack, and it is roasted by fire! However, if it becomes too large, the effect is not very ideal to control welding deformation, in addition to using a reasonable welding sequence and welding art, you can also carry out small anti-deformation treatment in advance, the effect is better! Use Angle steel and square pipe to weld rice support inside the box, in short, it can be fixed on the line, and gas cutting is used after welding; Welding power source: can use a more concentrated heat source, so that the relative heat input is reduced, such as melting electrode welding is better than manual arc welding, square tube hot wire TIG welding is better than conventional melting electrode welding, laser, plasma, electron beam welding is the use of heat concentrated heat source to achieve small deformation welding methods. 2, by changing the welding sequence and method, remove the welding stress; 3, welding sequence: the use of appropriate welding sequence, such as symmetrical welding, can reduce welding deformation. 4. Welding reverse deformation: What kind of deformation will occur after welding is expected before welding, and there will be a certain amount of deformation in the opposite direction before welding to reduce welding deformation. 5. Strong restraint during welding. The welding deformation can be controlled by using the hammer stroke with welding or the tensile stress preset on the sheet. 6, after welding, stress annealing can be used to remove or reduce welding deformation (generally speaking, welding deformation can not be completely removed, only relatively speaking). 7, of course, and the welding material has a direct relationship, the greater the coefficient of linear expansion, the more likely to occur when welding larger deformation. Therefore, it is also possible to choose the appropriate welding material according to the requirements, change the organization of the welding head, and change the welding deformation of the square tube.
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