Process Parameters Effect of Resistance Spot Welding on Weld Quality – A Review

Abstract

Welding engineering has undergone with a various changes in processes and materials to meet the requirement of customers and low welding cost in a present global competitive time. Large scale and high rate of production of components using sheet metal has been possible only due to resistance welding processes which have the dual advantage of making joints quickly and with minimum distortion. It is working on the principle that heat is generated by the resistance offered to the flow of current. Resistance welding processes include spot welding, seam welding, projection welding, flash welding, percussion welding, upset butt welding, high frequency resistance welding and high frequency induction welding. The process parameters affect upon Resistance Spot Welding (RSW) are welding current, resistance, time, electrode force, cooling water flow, electrode shape, sheet metal surface condition, etc. There is a various effects of process parameters interaction on final weld quality. There are different methods to get optimum weld quality by changing process parameters and their values. Artificial intelligence and neural network is also used to predict the resistance spot welded weldment quality.