PARAMETERS OPTIMIZATION OF GAS METAL ARC WELDING PROCESS (GMAW) BY USING DESIGN OF EXPERIMENTS
Keywords:
Gas metal arc welding (GMAW), Ultimate tensile strength, Taguchi method, Optimization, Deign of experiments (DOE)Abstract
The weld quality at the joint is directly influenced by the input welding parameters. A common problem faced
by manufacturer is to control process input parameter to obtain the good welded joint with required bead geometry, good
mechanical properties, weld quality with minimal detrimental residual stresses and distortion. In this study an attempt is
made to investigate the effects and optimization of welding process parameters on the tensile strength in the Gas
metal arc welding (GMAW) process. The experimental studies were conducted under various input parameters as
welding direction, wire speed, travel speed, arc voltage, contact tip to work distance, torch angle and gas flow rate.
Taguchi experimental design method was used to determine the settings of welding parameters. The level of importance
and percentage contribution of each parameter on the tensile strength was determined by using analysis of variance
(ANOVA). The optimum welding process parameter combination was obtained by using the analysis of signal-to-noise
(S/N) ratio.
