Analysis the effect of process parameters on robot spot welding of JSC 590RN mild steel using Taguchi based GRA

Abstract The paper is presented to optimize the process parameters of Robot spot welding of mild steel (JSC 590RN) for improvement of multi performance features by Taguchi based grey relational analysis (GRA) method. The four main input process parameters are electrode diameter (13 mm and 16 mm), electrode force (2650 N − 2850 N), welding current (9700 A-9900 A) and weld time (10 cycles- 14 cycle) are taken out for the experimental study. According to Taguchi L18 orthogonal array 18 experiments were performed by taking two values of electrode diameter, three values for remaining three parameters, heat-affected zone (HAZ) and tensile shear (T-S) strength were taken as performance features for improvement. Taguchi with GRA was applied for improvement in multi performance features and after that Taguchi response table and analysis of variance (ANOVA) were used to examine the data. Validation of outcomes was completed by a confirmation test which shows that it is possible to increases the weld quality up to 4.87%.