| 摘要 |
<p>Provided is a drill head manufacturing method in which a CVD coating is applied in manufacturing of a drill head where conventionally only a PVDcoating is applicable, thereby utilizing features of the CVD method effectively, which renders a tool service life longer and enables a drill head more suitable for high-speed cutting to be manufactured. A cutting tip 2 having been CVD coated with a hard material is brazed to a required portion at a distal end side of a head main body 1. An outer diameter portion OD of the brazed tip 2 about a rotation axis G of the head main body 1 is polished. Then, the cutting tip 2 and the head main body are PVD coated with a hard material at a temperature lower than the brazing temperature.</p> |
