Investigation study of electrical discharge machining parameters on material removal rate for AISI M2 material

Abstract

EDM (Electrical Discharge Machining) is a common non-traditional machining technique for manufacturing geometry parts made of intricate or extremely rigid metals that are challenging to manufacture using conventional manufacturing techniques. Electrical discharge machining, by utilizing electrical discharge erosion, classifies the process of material removal (MR). The main objective of this paper is to discuss the ideal EDM parameters for using high-speed steel as workpiece AISI M2 and with using brass & copper as electrodes. Pulse on-time (100, 150, and 200 µs), current (10, 24, and 42 A) and pulse off-time (4, 12, and 25 µs) are the input parameters that affect the material removal rate (MRR) in the experimental work. The findings of the present study show that the highest MRR was achieved with copper & brass electrodes using a pulse on-time of 200 µs, pulse off-time of 12 µs, and a current of 42 A, resulting in rates of (0.31284 g/min and 0.18769) respectively. The lowest average value of the removed material was observed when evaluating a current of 10 A, pulse on-time of 100 µs, pulse off-time of 4 µs, resulting in rates of (0.05451g/min and 0.01898 g/min) respectively.