Study On Correlation Between Resistance Spot Welding Parameters And Weld Quality

The dynamic welding parameters in the process of resistance spot welding are closely related to the weld quality. In this paper, spot welding tests were carried out and dynamic process parameters of welding current, electrode voltage, electrode force, as well as electrode relative displacement were measured simultaneously by taking low carbon steel as the specimens. The data acquisition program was written in LabVIEW and the weld quality of the welded joint was checked in tensiling stress. The eigenvalues, abstracted for each signals in every welding conditions, were taken as the input, and the shearing strength as the output, a BP neural network model was established. The results show the effect of each dynamic welding parameter on weld quality, provided a basis on on-line welding quality monitoring and non-destructive welding quality examination.