| abstract |
The invention relates to the technical field of welding, in particular to a laser welding method. The laser welding method comprises the following steps: controlling a positioner clamping the cylinder and the flange plate to rotate according to a preset linear speed; controlling the laser welding head to move from the initial position to the welding position, and gradually increasing the power of the laser welding head until the power of the laser welding head is increased to the preset power; controlling a laser welding head to be kept at a welding position within a preset time; and controlling the laser welding head to move from the welding position to the initial position, and gradually reducing the power of the laser welding head. The laser welding method can avoid the defects of perforation, cracks, deformation and the like of the test piece, reduce the residual stress of the test piece, and ensure the sealing property and the coaxiality of the test piece after welding, thereby improving the welding quality of the large thick-wall-difference sealing test piece. |