SELECTION OF THE WIRE CUT ELECTRICAL DISCHARGE MACHINING PROCESS PARAMETERS USING GRA METHOD

Abstract

Wire electrical discharge machining (WEDM) is one of the important non-traditional machining processes, which is used for machining of difficult-to-machine materials and intricate profiles. WEDM is a complex machining process controlled by a large number of process parameters such as Pulse on Time (Ton), Pulse off Time (Toff), Flushing Pressure (FP), Wire Tension (Wt), Servo Voltage (SV) and Wire Feed Rate (WF) in Wire Cut Electrical Discharge Machining (WEDM) Operations. The Response Process Parameters are measure in Wire Cut Electrical Discharge Machining (WEDM) Operations Such as Material Removal Rate, Kerf Width and Surface Roughness have been considered for Each Experiment. Experimentation was planned as per Taguchi’s L27 Orthogonal array. Molybdenum Wire with 0.25mm Diameter and High Carbon High Chromium Die Steel (HCHCR) were used as tool and Work Materials in the Experiments. The Machining parameters are optimized with the multi response characteristics of the material removal, kerf width rate and surface roughness using the grey relational analysis.