DEVELOPMENT OF MATHEMATICAL MODELS TO ANALYSE AND PREDICT WELD BEAD GEOMETRY AND SHAPE RELATIONSHIPS IN GMA WELDING OF C-45 STEEL

Shubham Jain, Paritosh Singhal, Pradeep Khanna

Abstract: Gas Metal Arc Welding (GMAW) has proved its significance in fabrication industry owing to its versatility and quality of joints. The process lends itself to full automation further increasing its potential use in mass production industry. To make the process automatic, it is necessary to establish relationship between the input parameters and the desired output. In the present case,effect of input parameters like Wire Feed Rate (WFR) , Voltage, Welding Speed, Torch Angle ,Nozzle to Plate distance(NPD) has been investigated on bead geometry and shape relationship responses like Penetration, Width ,Height of Reinforcement, Weld dilution ,Weld Penetration Shape Factor(WPSF),Weld Reinforcement Form Factor (WRFF).Statistical approach of design of experiments has been used to conduct the experiments .Response surface methodology technique has been used to optimize the results. Mathematical model has thus been developed whose significance and fitness has been checked by using design expert software.

Keywords: Arc welding, input parameters, bead geometry, mathematical modelling, response surface methodology

DOI: https://doi.org/10.15623/ijret.2018.0708020