Fractal Dimension Modeling of Surface Profile and Optimization in EDM Using Response Surface Method

摘要

The present study considers an experimental investigation of the influence of machining parameters, viz., pulse current, pulse on time and pulse off time on fractal dimension of surface profile produced in electrical discharge machining (EDM). Experiments are conducted for three different workpiece materials to consider the effect of material variation in this respect. The second order mathematical models, in terms of the machining parameters, have been developed for fractal dimension prediction using response surface methodology. The fractal dimension models as well as the significance of the machining parameters have been validated with analysis of variance. It is found that the response surface model for fractal dimension is specific to workpiece materials. An attempt has also been made to obtain optimum cutting conditions with respect to fractal dimension with the help of response optimization technique.