Forecasting of Tensile–Shear Strength of JSC 590RN Low-Carbon Steel Spot Welds Using Taguchi Technique Used in Electrical Grids

Resistance spot welding (RSW) is a sheet metal joining procedure mostly used in automobile and aerospace manufacturing due to easy automation and high productivity. This chapter presents the experimental and numerical results of spot welding by the KUKA robot on the cold-rolled, coated low-carbon steel (JSC 590RN) sheet. The purpose of this study is to see how welding input components affect the T–S strength. The process parameters taken into account are electrode diameter (d), electrode force (F), welding current (I), and weld time (t) to optimize the result of tensile–shear (T–S) strength. The electrodes will overheat and undergo expulsion due to high current and time, which will directly affect the weld quality. Taguchi L18 technique was selected for the experimental trial. The S/N ratio was applied to calculate the influence of welding parameters on the T–S strength. ANOVA and F-test were employed to determine the contribution of each parameter. The result is confirmed and validated by a confirmation test, which illustrates that it is feasible to improve the T–S strength appreciably.