Study the effect of process parameters in plasma arc cutting on Quard-400 material using analysis of variance

Abstract Aim of present work is to investigate the effects of process parameters of plasma arc cutting of Quard – 400 material using analysis of variance. Two process parameters, cutting speed and gas pressure are considered and experiments are conducted based on full factorial design. Process responses viz. mean surface roughness (R a : center line average roughness) and material removal rate (MRR) of machined surface are measured for each experimental runs. Higher material removal rate means industry can cut more metal in same period of time which ultimately results in more profit. And less surface roughness makes finished product more suitable for assembly and easy handling. For minimum mean surface roughness and maximum material removal rate, process parameters are optimized with the help of full factorial design coupled with response surface method. Analysis of Variance (ANOVA) is performed to get the contribution of process parameters on responses and it was found that cutting speed has most significance.