Precautions to be taken in the process measures to prevent welding deformation in Sheet Metal Processing in Shenyang:

(1) Choose the appropriate welding sequence. For welded structures with a large number of components, the components should be welded and corrected separately before assembling and welding as a whole. This way, the deformation is smaller than assembling them as a whole first and then welding them. And local areas can be installed and welded at the same time, making the operation relatively convenient.

(2) Choose a reasonable welding sequence. To prevent welding deformation, strip welding, back welding, and symmetrical welding should be adopted in the welding sequence.

(3) Anti deformation method. It is to give the welded part a deformation direction opposite to that after welding before welding, and after welding, it exactly offsets the deformation of the workpiece before welding.

(4) Rigid fixation method. This method is very effective in reducing welding deformation.

(5) Choose appropriate welding methods and standards. The energy density and heat input of heating welds vary among different welding methods. For thin plate welding, selecting welding methods with high energy density, such as using carbon dioxide gas shielded welding and plasma arc welding instead of gas welding and manual arc welding, can reduce welding deformation. When welding aluminum and aluminum alloy structures, gas welding causes much greater deformation than manual argon arc welding.

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