SELECTION OF THE WIRE CUT ELECTRICAL DISCHARGE MACHINING PROCESS PARAMETERS USING AHP/TOPSIS METHOD

Abstract

In this present study a multi response optimization method using AHP/TOPSIS method is
proposed for wire electrical discharge machining (WEDM) operations. Experimentation was planned
as per Taguchi’s L27 orthogonal array. Each experiment has been performed under different Process
Parameters conditions of 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. 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
AHP/TOPSIS.