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Electrical discharge machining is a nonconventional machining process which enables machining of complex and intricate shapes, hard materials that are precise and difficult to machine such as heat treated tool steels, composites, super alloys, ceramics, carbides, heat resistant steels etc. The process involves spark erosion in the presence of dielectric fluid. In this work SCM 420low alloy steel is the material used for the machining purpose with electrolyte copper as tool. This work investigates effect of process parameters peak current (IP), Pulse on time (Ton) and gap voltage (Vg) on Material removal rate (MRR) and surface roughness (Ra). Response surface methodology is used for experimental design. The suggested model can be used in the different manufacturing firms by selecting right combination of process parameters to achieve optimal values of output responses.

Optimization of Electrical Discharge Machining Process Parameters using SCM420 low alloy steel by Response Surface Methodology