An Estimation of Cylindrical Surface Obtained by Ball End-milling Using Makyoh-topography Images(Digital design and digital manufacturing)

Abstract

We deal with finishing the curved surfaces in hardened steels (JIS: SKD11, etc.) with (Al,Ti) N-coated ball end-milling. We used two kinds of cutter locations, scanning line cutting and contour line cutting, for finishing the curved surface of hardened steel. We examined the work surface roughness and tool wear. In scanning line machining, an irregular luster (striped pattern) peculiar to the machining work surface was caused. We also proposed a new method to estimate possible causes of the peculiar striped pattern which could be judged only from observation of the machined surface using Makyoh-topographic images.