Control of Laser Welding Distortion of Thin Stainless Steel Plate
In order to predict welding distortion of thin stainless steel plate,some measures were taken to reduce the welding distortion according to predictive values.Firstly,the residual plastic strain under the conditions of the rigid constraints,the combining action of rigid constraints and reverse deformation in the process of welding was analyzed.Using the theory of residual plastic strain to calculate the welding distortion,then the calculated value was taken as the predeformation to design special fixture.The equal reverse deformation on the workpiece was proposed before welding,and the welded workpiece was measured using CMM after laser welding test.The results show that the workpiece welded under the conditions of rigid constraints and reverse deformation can significantly reduce the welding distortion,and the measured value is basically consistent with the calculated value,and meets the requirement of the welding.The theory of residual plastic strain can be used to predict the distortion of simple components,and the reverse deformation is an effective method for controlling the welding distortion.