How to solve the welding problem of thin stainless steel?

The most difficult problem of thin stainless steel laser welding machine is welding penetration and deformation. The stainless steel sheet has a small degree of restraint. It is locally heated and cooled during the welding process, resulting in uneven heating and cooling, and the weldment will produce uneven stress. And strain. When the longitudinal shortening of the weld exceeds a certain value of the pressure on the edge of the thin plate, serious wave-like deformation will occur, which will affect the appearance quality of the workpiece.

The main measures to solve the burning through and deformation of stainless steel sheet welding are as follows:

(1) Strictly control the amount of heat input on the welding joint, and select the appropriate welding method and process parameters (mainly welding current, arc voltage, welding speed);

(2) Strive to be precise in the assembly dimensions and minimize the interface gap. Larger gaps are easy to burn through or form larger weld scars;

(3) Hardcover fixtures must be used, and the clamping force is evenly balanced. The key to welding stainless steel sheet is to strictly control the heat input on the welded joint, and strive to minimize the heat input on the premise that the welding can be completed, thereby reducing the heat affected zone and avoiding the above defects.

The deformation of the stainless steel sheet by argon arc welding is unavoidable, and only the stepwise regressive welding method can be used. The current used should not be too large, and the heating time of the sheet should be shortened as much as possible to minimize the deformation of the sheet.

The best thing about the thin stainless steel plate is that it can be welded by laser welding 0.1MM. The laser spot size can be adjusted arbitrarily, which can be well controlled