Quality Estimation System for Resistance Spot Welding of Stainless Steel

Resistance spot welding (RSW), as one of the most widely used processes in sheet metal fabrication, is a complex electromechanical coupled nonlinear process, and weld quality is influenced by various process conditions, noise and errors. Therefore, inconsistent quality from weld to weld is a major problem for RSW process. However, so far there is no satisfactory non-destructive quality estimation method to evaluate the weld quality.