Response of Wire Electrical Discharge Machining For H13 Using Taguchi L9 Array

This paper presents, the experimental study has been made to optimize the process parameters during machining of H-13 by wire electrical discharge machining (WEDM) using Taguchi L9 orthogonal array method. Following input process parameters of WEDM [Pulse-On time (TON), Pulse-Off time (TOFF) and Wire Speed rate (WS) and Wire Tension (WT)] were chosen as variables to study the process output in terms of Material Removal Rate (MRR), Wire wear ratio(WWR),Surface Flatness(SF). In the present work, the parametric optimization method using Taguchi’s robust design is proposed for wire-cut electric discharge machining of H-13. H13 has its wide application in pressure die casting tools, extrusion tools, forging dies, hot shear blades, stamping dies, plastic molds. ESR H13 is great for aluminum die-casting tools and plastic mold tools requiring a very high polish. In the present study, the zinc coated copper wire electrode is used as the best compromise of above complex needs. Experimentation has been done by using Taguchi’s L9 orthogonal array. Each experiment was conducted under different conditions of pulse on time, pulse off time, wire speed, and wire tension. Result of response of material removal rate, wire wear ratio, surface flatness is considered for improving the machining efficiency. Optimal combinations of parameters were obtained by Taguchi’s L9 orthogonal array and Mean of Mean approach method.