| 摘要 |
The present invention relates to a cutting insert for a face milling tool. The tool comprises a milling body intended to be rotated in a milling machine. The milling body comprises a number of seats for receiving tetragonal, pentagonal or hexagonal cutting inserts (11). The cutting insert comprises two, essentially parallel, side faces as well as them uniting edge surfaces and comprises a number of cutting edge pairs which are formed at the transition of a side face and a edge surface of the cutting insert. The side face constitutes a chip surface and the edge surface constitutes a clearance surface. Each cutting edge pair consists of a major cutting edge (15) and a minor cutting edge (16), which meet in the area of a cutting corner (17), which corner has a bisector (B). The minor cutting edge is provided to generate a surface on a work piece (40). Associated major (15) and minor(16) cutting edges are provided at one and the same side of the bisector (B). Two minor cutting edges connect to each other at or in the vicinity of the bisector (B), said minor cutting edges (16) being arranged substantially perpendicular to the axis of rotation of the face milling tool. The minor cutting edge (16) is sharper than the major cutting edge (15) by connecting the major cutting edge to a first concave chip forming surface in the chip surface via a chip-upsetting surface while the minor cutting edge directly connects to a second concave chip forming surface. <IMAGE> |
