MODELLING SURFACE FINISH IN THE INNER CIRCLE MACHINING OF 90CrSi TOOL STEEL USING WIRE CUT EDM

This paper introduces a study on modelling surface finish in the inner circle machining of 90CrSi tool steel using wire cut electrical discharge machining (EDM). In this study, experiments were performed with full factorial design with a total of 32 experiments. Also, the input parameters including the cutting radius, the cutting voltage, the pulse on time, the pulse off time, the server voltage, the wire feed and the cutting speed were carefully selected. The influence of this parameters on the surface roughness were examined by analysing variance. Additionally, from the experimental results, a regression model to calculate the surface roughness is proposed.