Surface roughness analysis of hardened steel after high-speed milling

Abstract

The work refers to analysis of various factors affecting surface roughness after end milling of hardened steel in high-speed milling (HSM) conditions. Investigations of milling parameters (cutting speed vc, axial depth of cut ap) and the process dynamics that influence machined surface roughness were presented, and a surface roughness model, including cutter displacements, was elaborated. The work also involved analysis of surface profile charts from the point of view of vibrations and cutting force components. The research showed that theoretic surface roughness resulting from the kinematic-geometric projection of cutting edge in the workpiece is significantly different from the reality. The dominant factor in the research was not feed per tooth fz (according to the theoretical model) but dynamical phenomena and feed per revolution f. Copyright © 2011 Wiley Periodicals, Inc.