| 摘要 |
A metal cutting tip having an upper face (5) and a curved relief face defining (4) between them a substantially circular cutting edge (6); a chip former located in said upper face (5) and comprising a plurality of substantially radially directed recesses (8) formed in said upper face (5) and respectively extending from and merging smoothly with, a land surface (7) adjacent to and coextensive with said cutting edge (6) to, and merging smoothly with, a substantially centrally located deflector wall (9); adjacent recesses (8) intersecting at substantially radially directed rectilinear ridges (11), each ridge (11) merging smoothly at one end thereof with a component rake surface (12) extending smoothly from said land surface (7) and at an opposite end thereof, with said deflector wall (9). <IMAGE> |
