| 摘要 |
<p>There is provided a cutting insert for threading work for achieving high shape accuracy of a screw to be processed, as well as low costs. Therefore in the cutting insert for threading work, a plurality of tooth-shaped cutting edges are formed in a cross ridge line between a rake face (2) and flanks formed in a side face, wherein the cutting edge comprises at least one finishing cutting edge (6a) for transferring a shape of a screw, and at least one roughing cutting edge (6b) formed in a tooth-shape smaller than that of the finishing cutting edge (6a). A flank (4a) of the finishing cutting edge (6a) includes a first flank (5a), and a second flank (5b) having a clearance angle larger than that of the first flank (5a), wherein the finishing cutting edge (6a), the first flank (5a), and the second flank (5b) are sequentially provided in that order.</p> |
