Published Paper Details:

Welding is a powerful method of joining two or more structural parts. The industries use machines which are constructed of several parts. These parts may have joints to increase their length or surfaced area.. Welding is one of the important methods of making joints and the tungsten inert gas welding is a very important method for welding process. In welding beads are formed which are consisted of reinforcement height, depth of penetration and weld width. These dimensions of the beads indirectly decide the mechanical properties of the weld. In this work many experiments were performed with Tungsten Inert Gas Welding machine to critically analyze the effect of welding voltage on the dimensions of the bead. All the other input variables except the welding voltage were fixed, as the feed rate at 8.47 mm/s, welding speed at 1.19 mm/s and welding current at 100 A for whole the experimentation period. Only the values of welding voltage were varied and the effect of this variation on depth of penetration, weld width and reinforcement height was studied. Total 6 pairs of mild steel plates of dimensions 75 mm x 50 mm x 5 mm were welded for 6 variations of welding voltage. The results were tabulated and were expressed in three different diagrams in which one was for depth of penetration, one was for reinforcement height and one was for weld width. This study explains the sensitivity analysis of the effect of the welding voltage on the three dimensions of the weld bead.