Experimental Investigations on Surface Roughness during End Milling of AISI H13 Hardened Tool Steel

Abstract

This paper presents the result of an experimental investigation on surface finish during end milling of AISI H13 hardened tool steel with PVD-TiAlN coated carbide and PCBN tool inserts. Mathematical models for the prediction of roughness have been developed in terms of cutting speed, feed and axial depth of cut by using Response Surface Methodology (RSM). Sufficient numbers of experiments were run based on the Central Composite Design (CCD) concept of RSM in order to generate roughness data. The adequacy of the models has been tested by analysing the variance. From the model it was found that feed plays the most dominating role on surface finish followed by cutting speed. However, axial depth of cut does not have significant effect on roughness value.