Optimization of TIG Welding Process using Taguchi Method

Manufacturer's often face the problem to achieve a good welded joint with the required quality due to control of the input process variables. The main objective of this investigation is to find best process parameters for good quality weld in TIG welding. Gas Tungsten arc welding (GTAW) is a popular choice of welding process when high level of weld quality or considerable precision welding operation is required. Taguchi Method with L9 orthogonal array was used to find best settings of welding current, filler rod diameter, gas flow rate and root gap. Further the mechanical testing was performed. Tensile strength is chosen as the response values. The study of the welding parameter's effect on tensile strength of weld specimen were carried out by statistical technique i.e. analysis of variance (ANOVA) with Signal to Noise (S/N) ratio. The optimum parametric conditions were found out by Taguchi method. Confirmatory test was performed to achieve the validity of the results.