| 摘要 |
<p>This roughing insert is provided with an insert body, and a waveform cutting edge which is formed on an intersecting ridge line portion between a rake face and a flank face of the insert body, and which undulates along this intersecting ridge line portion. The waveform cutting edges are formed on the insert body respectively at positions which are rotationally symmetrical at predetermined angular intervals around a reference line of the insert bodies. These waveform cutting edges which are positioned rotationally symmetrically to each other are formed such that, when the insert bodies are rotated by the predetermined angle around the reference line, one or more portions of the waveform cutting edges do not match each other and are mutually asymmetrical.</p> |
