Micro-cutting of holes by centrifugal force

Abstract

The paper presents a novel process of micro-cutting wherein the material removal is achieved by applying a constant penetration force of the cutting tool into the workpiece. Penetration force is achieved by a specially designed moving assembly comprising a tool and toolholder. Micro-cutting with constant cutting force is performed on conventional machine tools, using conventional cutting tools. The design of the tool and toolholder assembly enables the regulation of the penetration force intensity, i.e. the regulation of cutting depth. The regulation is achieved by changing the mass, eccentricity, and angular velocity of the moving assembly. The obtained results indicate that the applied method provides small cutting depths, a reduction of circularity deviation and roughness, and a more favourable distribution of the material in the surface layer.