Semi-empirical Model on Work Removal and Tool Wear in Electrical Discharge Machining

Abstract A semi-empirical model of the material removal rate on the work and the tool for various materials has been established by employing dimensional analysis based upon pertinent process parameters screened by the design of experiment in the electrical discharge machining process. The parameters of the model, such as the peak current, pulse duration, electric polarity, and the properties of materials, have been systematically selected and then verified by making use of the standard Taguchi method. Predictions based on the semi-empirical model with model parameters being calculated by a non-linear optimization method have shown a good agreement with the experimental verifications.