Macro Scale Arrayed Structure Fabrication using Reverse EDM

Abstract

Abstract:In the last few years, industries have been facing challenges to fabricate the complex shaped geometries and arrayed structures on difficult to cut materials. Recently, various researchers have successfully applied reverse electro-discharge machining (R-EDM) process for manufacturing of the arrayed structures at micro-level. In this paper an attempt has been made to check the feasibility of R-EDM for manufacturing the arrayed structure at macro-level and used it as a tool electrode in normal EDM. Effects of process variables likepulse current, gap voltage and pulse ON time are analyzed through the variation of material removal rate (MRR), tool wear rate (TWR) and surface roughness. Discharge current found to be an influential parameter which affects the MRR and TWR severely in both variants of EDM i.e. R-EDM and normal EDM.