Experimental Investigation And Analysis Of Air With Water Mist Wire Cut Electrical Discharge Machining Process Using Rsm Methodology

The wire electrical discharge machining (WEDM) experiments has been conducted using air and water mixture as a dielectric medium, is called environmental friendly near dry WEDM. In this technology, the dielectric fluid (Deionized water) is replaced by liquid-air to minimize the environmental impact in the machining zone and operator health. The effect of discharge current (I), Pulse width (TON), pulse interval (TOFF), applied voltage (V), air pressure (P) on the material removal rate (MRR) and surface roughness (Ra) have been analyzed using central composite design method. The set of experiments are conducted using response surface design of experiments. The mathematical models are developed using regression second order analysis. The optimum MRR and Ra are predicted and mathematical model have been developed by Response surface methodology (RSM). It is observed from this study, the voltage, spark-current and pressures are the significant parameters for the output parameters.