| 摘要 |
A metal cutting insert (1) of substantially polygonal shape having top (12a), bottom (12b), front (13a), rear (13b) and side faces (14a, 14b); a front cutting edge (19) being formed at the intersection of the top (12a) and the front face (13a) and first and second side cutting edges (17a, 17b) formed respectively at the intersections of the top (12a) and the two side faces (14a, 14b), chip forming means being located on the top face (12a) within an area defined by the cutting edges (19,17a,17b); the top (12a) and bottom faces (12b) being respectively of convex and concave disposition. |
