Parameter study and optimization of WEDM process: A Review

Abstract

Wire electrical discharge machining (WEDM) is a non traditional electro thermal machining process used for the manufacturing of 3D complex shape and geometry of the alloys or composites. Wire EDM capable of precisely machining parts with different Sizes or hardness which have keen edges that are very tough to be machined by the traditional manufacturing processes. There are many numbers of process parameters and performance measures. Lots of researchers have studied and investigated this machining process. This paper shows the reviews in the current research trends in wire electric discharge machining. There are many process parameters, such as pulse on time (TON), pulse off time (TOFF), servo voltage, peak current (IP), wire tension, wire speed for the improvement of different performance parameter such as material removal rate (MRR), surface roughness (SR), surface integrity factors, Kerf width and Tool wear ratio (TWR). The different optimization technique include Taguchi technique, GRA (Grey Relational Analysis), RSM (Response Surface Methodology) and analysed by ANOVA (Analysis of Variance), on different material like Alloys, Superalloys and MMC (Metal Matrix Composites). This literature survey gives the acceptable process parameters and its effect on different performance measure under normal or cryogenic treated tool electrode condition and their ranges in machining of different materials