Wire cut EDM is one of the non-traditional machining processes. Machining parameters affecting quality characteristics in the machining process is thoroughly studied. In this present study AISI 52100 is used as a work piece. The input parameters selected for optimization pulse on time, pulse off time, voltage and wire feed. Dielectric fluid pressure, wire tension, resistance and cutting length are taken as fixed parameters. The experimental of the Taguchi L32 has been used. For each experiment material removal rate, surface roughness and kerf width was determined by using contact signal to noise ratio measuring system respectively. By using multi objective optimization technique Grey Relational Analysis, in order to optimize the input parameters in wire EDM for AISI 52100. The Analysis of variance is too useful to identify the most important factor. The objective of optimization is to attain the maximize the material removal rate, minimize the surface roughness and minimize the kerf width.
Wire-cut Electro Discharge Machining (WEDM) is a special form of conventional EDM process in which electrode is a continuously moving conductive wire. The present study aims at determining parametric influence and optimum process parameters of Wire-EDM using Taguchi’s Technique and Genetic algorithm. The variation of the performance parameters with machining parameters was mathematically modeled by Regression analysis method. The objective functions are Dimensional Accuracy (DA) and Volumetric Material Removal Rate (VMRR). Experiments were designed as per Taguchi’s L16 Orthogonal Array (OA) where in Pulse-on duration, Current, Pulse-off duration, Bed-speed and Flushing rate have been considered as the important input parameters. The matrix experiments were conducted for the material Oil Hardened Non Shrinking Steel (OHNS) having the thickness of 40 mm. The results of the study reveals that among the machining parameters it is preferable to go in for smaller pulse-off duration for achieving over all good performance. Regarding MRR, OHNS is to be eroded with medium pulse-off duration and higher flush rate. Finally, the validation exercise performed with the optimum levels of the process parameters. The results confirm the efficiency of the approach employed for optimization of process parameters in this study.
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