抄録
In up milling, the finished surface is generated only by the initial part of contact between cutting edge and workpiece, in which there exist an elastic and a plastic deformation different from cutting. In this paper, the surface generation mechanism in up milling is experimentally investigated by milling with a single point plain milling cutter. The plastic deformation region exists in the part following the top of tooth mark on the finished surface in milling. The ratio of the plastic sliding length to the finished surface length (the plastic sliding ratio) decreases with increases of the interference angle and the cutting velocity, while it is not affected by the depth of cut. For the plastic sliding ratio larger than one all the finished surface is generated only by the plastic deformation region. The surface finish is closely related to the plastic sliding ratio.
