Author : Kuwar Mausam, Mohit Tiwari, Kamal Sharma and Ravindra Pratap Singh

The objective of this paper is to determine the optimal combination of the process parameters in a high speed electro-discharge machining (EDM) while machining carbon fiber epoxy composite with the copper-cadmium tool. The parameters considered are peak current, gap voltage, pulse-on-time and duty cycle; whereas the response is material removal rate (MRR). The optimal setting of the parameters are determined through experiments planned, conducted and analyzed using the Taguchi method followed by regression analysis. In Taguchi’s design of experiment three levels of each parameter has been taken into consideration by using standard L9 orthogonal array to find out optimal setting of machining parameter for maximum material removal rate. A relationship among selected process parameters is developed doing regression analysis with the help of MINITAB 15 software.

Keywords: EDM, Taguchi Method, MRR, MINITAB 15