| 摘要 |
<p>The present invention relates to a method of turning a rotating metallic work piece, the hardness of which lies within the interval of 45-65 HRC. A turning tool (10) comprising a cutting insert holder (11) and a cutting insert (12) mounted therein is brought into engagement with the work piece rotating relative to the turning tool. The cutting insert has a cutting edge (14; 14') made of cubic boron nitride which is harder than cemented carbide and has a cutting edge length. The cutting insert is fed in a direction (F) a distance into the rotating work piece, which distance is shorter than the cutting edge length in order to give the surface finish Ra of maximum 0.2 νm. The ends of the active cutting edge (14) are situated outside the zone of contact with the work piece (13).</p> |
