Improvement of EDM machining performance by brass coated copper electrode

The main objective of this work is to improve the selected output responses of EDM machining PH15-5 stainless steel material with brass coated copper electrode by controlling various process parameters such as voltage (V), current (Amp), pulse on duration (μs), pulse off period (μs), fluid pressure (Kg/cm2) and shape of tool. Well-designed experiments were conducted using an L27 orthogonal array according to the Taguchi method. The signal to noise (S/N) ratio associated with measured values was plotted, and factors affecting response factors have been obtained. The output of the experiments on a brass coated copper electrode was inferred and compared with a copper electrode. Machining performance has been improved slightly, and the desired quality of the machined surface feature was obtained while using the brass coated copper electrode.