Multi-objective optimization of machining parameters in wire EDM for AISI-304

Abstract

Abstract Wire Cut EDM technique is used to make small and precision cuts. Generally a material with fragile geometry and hard structure is cut using a wire cut EDM. The key advantage of the technique is that, there is no contact between the tool (wire) and the workpiece. This advantage gives it an edge over other machining techniques and it makes the process capable of machining even the weak structured and delicate materials. In the present experimental work, six machining parameters (Pulse on Time, Pulse off Time, Wire Tension, Spark Gap, Gap Voltage, and Wire Speed) were optimized using Taguchi’s L27 orthogonal array. The responses for the experiments were Material Removal Rate (MRR) and Surface Roughness (SR), which were analysed by Design of Experiment (DOE) and Grey Relational Analysis technique (GRA) techniques. This work stands out as both DOE and GRA have been applied to determine optimal solutions for best MRR and SR individually. Manufacturing quality product with low cost input is an aim of every industry, this aim can be achieved by optimization of input parameters.