Optimization of Wire EDM Process Parameters in Machining SS316 Using DEAR Method

Abstract

The present work is to explore the effect of Wire EDM process parameters on machining performance characteristics of SS316 material. A series of experiments were carried out based on L27 Orthogonal Array (OA) for the Wire EDM parameters of Pulse-on-Time (TON), Pulse-off-Time (TOFF), Wire Feed (WF), Wire tension (WT) and Servo Voltage (SV) taken at three different levels. The response parameters of Material Removal Rate (MRR) and Roughness (Ra) are optimized using a hybrid Taguchi method coupled with Data Envelopment Analysis based Ranking (DEAR). From the results of computed Multi Performance Rank Index (MRPI) values the optimal combinations are obtained at TON: 120 μs, TOFF: 58 μs, WF: 4 m/min, WT: 5 Kg-f and SV: 20V respectively. ANOVA results showed that Pulse-off-Time (TOFF) and Servo Voltage (SV) have the highest influence on multi-response.