| 摘要 |
<p>A metal cutting tool comprising a tool holder (1); a double sided cutting insert (15) retained therein via a shim (25) substantially corresponding in shape and lateral dimensions to the insert; there being formed in a rake surface of each of the upper and lower surfaces (16a, 16b) of the insert respectively in the region of each of the corners thereof a recess (23); the shim (25) being formed in an upper surface thereof adjacent at least one corner thereof a projection (27) adapted to fit into a corresponding recess (23) of the adjacent insert surface so that when the insert and shim are clamped in the tool holder (1) the projection (27) adjacent an operative pair of cutting edges of the insert bears against the walls of the associated recess so as effectively to support the insert (15) in this region with the operative cutting edges spaced from said shim (25).</p> |
