| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a cutting insert.SOLUTION: A cutting insert (20) for a machine tool comprises a flat blade formed from polycrystalline diamond material, and has a front face (21) thereon formed from a PCD phase (23) and a rear face formed from a second phase substrate (24), the rear face having serrations (25) therein formed within the second phase substrate (24), preferably substantially normal to each cutting edge. The cutting insert (20) is rectangular in plan view, and is held by a recess formed at a tip of a cutting tool, and the serration at the rear face is engaged with a plurality of serrations of the recess. The cutting insert (20) is configured to rotate at 90 degrees from a first holding position in the recess so as to be held by the recess, and in this case, the serration on the rear face is also engaged with the serrations of the cutting tool.</p> |
