Method and system for controlling welding deformation by applying elastic reversible deformation through structural rigidity increment

The invention provides a method and system for controlling welding deformation by applying elastic reversible deformation through structural rigidity increment, and the method comprises the following steps: S1, fixing a welding test piece by using a tool clamp, and controlling the magnitude of clamping force through the tool clamp, so that the elastic reversible deformation of the welding test piece is generated and meets the expected magnitude; s2, laser welding process parameters are set; s3, the fixed test piece is placed on a laser welding station, a program is operated, laser positioned welding and laser deep penetration welding are conducted respectively, and the welding process is completed; in the welding process, the elastic reversible deformation on the test piece is kept unchanged; and S4, after welding is finished and the test piece is cooled to the room temperature, the tool fixing clamp is removed, and the welded test piece is taken out. The test piece is prevented from being corrected after wel