Combined process method for reducing welding deformation of stainless steel part

Abstract

The invention discloses a combined process method for reducing welding deformation of a stainless steel part. When thin stainless steel is clamped before welding, an inner ring is cushioned by a cushion plate, an outer ring is pressed by a pressing plate, and anti-deformation support is provided. A laser and a positioner are matched to weld a circular seam of a workpiece respectively. Welding parameters are optimized, heat input is reduced, and high-speed, low-defocus and bifocal parameters are selected. Staggered intermittent welding is used in the welding process, two weld beads are welded in a staggered mode for 12 times, and welding is conducted by 60 degrees each time. After welding is completed, weld seams are evenly knocked so that the structure becomes uniform, the welded workpieceis turned over, then back laser shape correction is conducted, the overall deformation trend is adjusted, and then shape correction is conducted on the position with slight wave deformation through amechanical method. By means of the combination method, heat input can be effectively reduced, compared with a common pressing plate welding process, welding heat is less, the welding reliability is improved, the welding seams with good quality can be obtained after combination, welding deformation is greatly reduced, and flatness is improved.

Description

technical field [0001] The invention relates to the field of stainless steel welding, in particular to a combined process method for reducing welding deformation of stainless steel parts. Background technique [0002] Due to its good corrosion resistance, heat resistance, mechanical properties and weldability, stainless steel is widely used in construction, shipbuilding, chemical, automobile, food and other industries. In the process of welding thinner circular seam workpieces, the welding deformation is relatively large, and it is not easy to correct after welding, so it is necessary to cooperate with various methods before and after welding. [0003] If the same kind of workpiece does not use special tooling means, but only clamps it with a pressure plate, the welding deformation is difficult to control, and the flatness deformation after welding is more than 3mm, and the workpiece cannot be used. [0004] Conventional post-welding correction methods include mechanical co...

AI Technical Summary

Problems solved by technology

The workpiece may be damaged in the process of mechanical correction, and the correction ability of mechanical correction to stainless steel products is limited; the risk of flame correction is high, the operation is difficult, and experienced welders are required to operate, and the correction process is uncontrollable, and the environment of the correction process is harsh, which is also difficult to operate orthopedic program

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