| 摘要 |
A single-sided ramping milling insert (14) for ramping operations has top and bottom surfaces (20,22) and a peripheral surface (24) which extends therebetween. The peripheral surface (24) meets the top and bottom surfaces (20,22) at respective top and bottom edges (28,30). The top edge (28) includes two opposite side cutting edges (32), two opposite ramping cutting edges (30), two diagonally opposite raised comer cutting edges (44) and two diagonally opposite associated lowered comer cutting edges (54). The lowered comer cutting edges (54) are closer to the bottom surface (22) than the raised comer cutting edges (44). The bottom edge (30) has two diagonally opposite bottom comer edges (64). The lowered comer cutting edges (54) and the bottom comer edges (64) are convexly curved and a depression (66) is recessed into the peripheral surface (24) between each lowered comer cutting edge (54) and its associated bottom comer edge (64), the depression (66) configured for providing relief from a convex workpiece surface cut by the lowered comer cutting edge (54) during ramping operations. |
