OPTIMIZATION OF GMAW PROCESS PARAMETERS TO IMPROVE THE WELD PENETRATION BY USING TAGUCHI METHOD

In heavy fabrication industry, GMA Welding is a very useful & important welding process and E250 &E350 is common material used for manufacturing of various parts. This research gives the detail influence of welding process parameters such as welding current, welding voltage, welding speed on the penetration in E250 & E350 mild steel materials. The experimentation of this research has been carried out by using three factors, three level Taguchi method. To analyze & optimize the welding parameters & characteristics, analysis of variance, nine runs orthogonal array & signal to noise ratio are used. Penetration is a major concern in fillet welded joints, as the penetration decides the strength of the welded joint. After analysis of penetration in all 9 welded samples, optimize parameters readings verified & found probability value within 0.05.From this research it is come to know that welding current & welding voltage is major parameters which affects the penetration in welded joints.