Optimisation of Saw Process Parameters for Bead Geometry of Bead on Plate Welds Deposited on Structural Steel IS-2062 Using Taguchi Method

This paper deals with the investigation of optimal submerged arc welding (SAW) process parameters that affect weld bead geometry and quality of welds using TAGUCHI method. A planned experimental investigation has been carried out on a semiautomatic SAW machine. The effects of process parameters and signal to noise ratios have been computed and the contribution of the each factor has been validated by ANOVA. The results indicate the welding voltage to be the most significant contributor to weld penetration. The contribution of voltage, current, welding speed and nozzle to plate distance have been found to be respectively 60.8 %, 9.9 %, 3.5 % and 13.8 %. Optimum parameters have been found to be 26V, 475A, at welding speed of a 15 m/s and NTP distance of 16 mm. The main interaction effects of control factors on bead geometry have also been presented in graphical form.