Prediction of Wire-EDM Machining Parameters for Optimum of Surface Finish and MRR in an Aluminum Alloy 7075-T6

Prediction of Wire-EDM Machining Parameters for Optimum of Surface Finish and MRR in an Aluminum Alloy 7075-T6

Dr. N. Satynarayana¹, Dr. M Veeranjaneyulu² B V Manoj Kumar³,

G Naga Naveen⁴, D Lolyo⁵, D Maheswara Rao⁶, K.Naveenkumar⁷

¹Prof., Dept. of Mechanical Eng., Lingayas Institute of Management and Technology, Vijayawada

²Asso. Prof., Dept. of Mechanical Eng., Sri Sunflower College of Engineering and Technology, Lankapalii

^3,4,5,6,7 UG Student, Dept. of Mechanical Eng., Lingayas Institute of Management and Technology, Vij.

Abstract

Wire-cut EDM is a process that works by continuously feeding a wire electrode under tension on a vertical axis. A discharge voltage is applied through the wire, crosses via a dielectric liquid, and strikes the grounded work-piece. The work-piece is moved in an X-Y plane to trace a cut pattern through the material. The process is applicable to cut complex and elaborate shapes of workings in all conductive, hard and thicker materials. An appropriate modeling can advance the machining presentation and the product exactness. Surface Response Methodology (RSM) coupled with grey relation analysis method has been proposed to predict the performance characteristics namely the surface roughness and material removal rate of WEDM on the alloy AL7075-T6 work-piece material. Selected input parameters such as pulse on time, pulse off time, wire feed, wire tension and dielectric pressure. ANOVA is applied to determine significance of the input parameters for optimizing the process.

Keywords

Wire-cut EDM, RSM, grey relation analysis, ANOVA, WEDM