Optimization in Wire-Cut EDM of Nimonic-75 Using Taguchi’s Approach

Abstract

Wire electrical discharge machining removes electrically conductive material by means of spark discharges resulting from local explosion of a dielectric liquid. WEDM machining is used for hard material parts that are difficult to machine by conventional machining processes. This paper presents the investigation  on material removal rate and surface roughness of Nimonic-75 using WEDM process. Taguchi’s design of experiments approach has been used for planning and designing of experiments. Experiments are performed by using L9 OA. The four input parameters considered were pulse on time, pulse off time, peak current, servo voltage for experimentation.