Sensitivity analysis of the effective parameters on the material removal rate and surface roughness in the wire electrical discharge machining process
The most important goal of the craftsmen is to maximize the material removal rate while controlling the surface quality. In this article, according to the regression equation obtained from the design of the experiment using the response surface method, to investigate the extent and manner of influence of seven process parameters including, pulse on time, pulse off time, arc off time, gap voltage, wire feeding rate, wire tension and water pressure has been studied on two characteristics of material removal rate and surface roughness using Sobol sensitivity analysis method. The purpose of this research is to select the most optimal parameter in the machining process in order to increase the material removal rate and reduce the surface roughness. According to the results obtained from the sensitivity analysis, it can be seen that the factor of pulse on time and pulse off time each have an effect of 59% and 28%, respectively, the most effective parameters on the material removal rate, and the parameters of pulse on time and water pressure, respectively, with 81% and 18% influence are the most effective parameters on surface roughness.
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