| 摘要 |
A double-ended parting or grooving insert (1) comprising a central body portion (2) and a pair of opposite cutting end portions (3a,3b); each cutting end portion having an upper rake surface (4) and front (5) and side (6) relief flanks and a front cutting edge (7) formed at an intersection of the rake surface (4) and the front relief flank (5); the front relief flank comprising an upper relief flank surface (5a) component; a lower abutment surface (5b) component inset with respect to the upper component and disposed substantially normally with respect to a longitudinal median plane intersecting the front cutting edges and an intermediate surface (5c) component serving to bridge the upper and lower components. |
