Multi-Objective Optimization of Wire Electrical Discharge Machining Process Parameterson Inconel 718

Wire electrical discharge machining (WEDM) is an important manufacturing process to meet demands such as precise and low-volume product, etc. In this paper, the effects process variables on process responses like material removal rate (MRR) and Surface roughness(Ra). Further optimizations of machining parameters on the MRR and Ra have been investigated. The machining parameters which have been considered in presentinvestigation are wire tension, wire speed, discharge current and Pulse on time. The experimental layout was conducted using L-27 orthogonal array, experiment runs are conducted via a Taguchi design of experiment to predict the MRR and Ra responses on Inconel 718 super alloy as a workpiece and brass wire as tool. The level of importance of the machining parameters on the cutting Ra and MRR is determined by ANOVA analysis. Using the signal-to-noise (S/N) ratio, the optimum machining parameters combination has been obtained. To validate a mathematical model between control factors and responses like MRR and Ra are established by means of nonlinear regression analysis. This system model is employed to maximize the MRR and minimize Ra using Simulated Annealing (SA) algorithm. In this study the optimal machining parameters of WEDM process to achieve better MRR and Ra simultaneously (C) 2017 Elsevier Ltd. All rights reserved.