| 摘要 |
A metal cutting tool is described having an elongated tool body with an elongated, preferably arcuate, tool face portion. A plurality of recesses are formed in the tool face, each having a flat bottom face inclined inwardly and rearwardly to the longitudinal axis of the tool body. Each recess contains an indexable small, square, thin cutter insert with a bottom face resting on the flat bottom of the recess. Each insert has a flat bottom face, while the top face has a shallow generally spherical convex contour. Each side face is generally concave and forms an arcuate cutting edge with the convex top face. Each side face forms an acute angle with the top face of the insert, and the magnitude of this acute angle and the degree of inclination of the recess flat bottom face are such as to provide a positive rake angle of 1 DEG -30 DEG between the cutter portion and the work cut.
|
