| 摘要 |
An insert for the radial turning of grooves composed of a shank portion (2) and a cutting head (3) wherein the cutting head (3) includes an upper side composed of two inward sloping surfaces (11, 12) and two corresponding surfaces (13, 14) constituting the bottom surface as well as flank side surfaces (15, 16, 17) which extend between them. The dividing line between the upper surface and the forward flank (17) constitutes the main cutting edge (18) and the dividing lines between the upper surface and the lateral flanks constitute the side cutting edges (19, 20). The upper surface features a number of grooves (21) on each side of the inserts centre line (CL) which are separate from each other and which form a non-continuous side cutting edge (19, 20). The groove (21) is preferably V-shaped. The top side of the insert features at its forward end two protrusions (24, 25) at a distance from each other situated symmetrically on each side of the centre line (CL), the extent of which is limited by an oblique upward sloping surface and a portion of an upper planar surface. Protrusions (24, 25) are oblong in shape and are, when seen from the front surface (17) of the insert, first converging towards each other and subsequently divergent relative to each other. This geometry has resulted in an insert which is extremely well suited for the radial turning of grooves. |
