Study on parameters optimization in resistance spot welding of stainless steel with rectangular electrodes

By means of the quadratic regression orthogonal combination design,a mathematical model of the relationship between the quality of spot welds and the welding parameters,including welding current,welding time and electrode force,is established.The influences of welding parameters on long-axis dimension of the nugget and shearing resistance of spot welds are studied and the welding parameters are optimized.The results show that the regression equation obtained can realize the accurate prediction of long-axis dimension of the nugget and shearing resistance of spot welds.