53 巻 (1987) 493 号 p. 2004-2007
Tool life and surface roughness on finish hobbing With CBN hobs are valued, based on plain milling, which is quite similar to hobbing. Two dimensional cutting and V-groove cutting with CBN fly tools are carried out on the milling machine. The finished surface is fine and tool wear is relatively small in the cutting of a hard work piece at high speed, because a dead metal that is similar to built up edge disappears from the cutting edge. In this condition, the form and size of finished surface roughness correspond to those of tool flank face roughness.