Improvement of Surface Roughness for End Milling using Cutting Edge with High-Accurate Flank Surface.

Abstract

This paper deals with improvement of the surface roughness for end milling using the cutting edge with a high-accurate flank surface. In usual end milling, it is very difficult to machining a high-accurate surface even if finishing conditions are used, because of the surface machined is copied by the roughness curve of flank surface of a cutting edge. Then it is investigated that the surface roughness of machined surrace in axial direction is improved by high-accurate cutting edges. The main results are as followings. (1) Maximum hight of roughness curve of machined surface in axial direction is almost 10 times as large as that in feed direction. (2) The roughness curve of flank surface of cutting edge was copied on that of machined surface, and the degree of transference is diffined by the mean of the absolute value of defferences of both roughness curves. (3) The maximum hight of roughness curve of a flank surface decreases from 1.71 μm to 0.53 μm of which surface is finished by a diamond wheel. (4) The maximum hight of roughness curve of machined surface decreases drastically from 2.53 μm to 0.58 μm using the above high-accurate cutting edge.