Effect of Machining Parameters on the Surface Roughness and TWR in REDM of AISI D3 Steel with Graphite Electrode

Abstract

The effect of various operational variables like tool rotation (Trpm), peak current (Pc) and Grit Size (Gs) in silicon Carbide (SiC)) on the Surface roughness (Ra) for AISI D3 Steel with Graphite Electrode of diameter 20 mm is investigated by the experimental work. A correlation has been established among the process parameter and responses in REDM using designing experimentation conducted as per L27 orthogonal arrays using Minitab17. The cooling rate and flushing pressure of the dielectric fluid affected the surface roughness (SR) and TWR as the response were assessed and correlated with oscilloscope (DSO) results. It was observed that optimal result has been obtained from optimal set of parameter value for surface roughness and TWR.