Effect Of Welding Current On Mechanical Properties Of Galvanized Chromided Steel Sheet In Resistance Spot Welding

In this study, the effect of welding current on mechanical properties of galvanized chromided steel sheet with thickness 0.5mm and lmm spot welded by resistance spot welding were investigated. Two levels, four factor and half-fractional factorial design applied for conducting the experiments. The welding current, electrode force, weld time and sheet thickness were chosen as welding parameters. The maximum stress on the nugget was measure by using tensile shear stress machine and the nugget area were measure by using AUTOCAD software. For each set of parameters, the data were processed by using statistical method of regression. The mathematical models that obtain form the analysis of data was tested on the accuracy of the models. The value obtain through the manual calculation base on the model were compared with the observe value in a graph. The most influent parameter on tensile shear stress were found is welding current whereas the most influent parameter on nugget area were found is weld time.