| 摘要 |
<p>The present invention relates to a round rotational cutting tool like conventional ball end mills. The round rotational cutting tool of the present invention is a cutting tool in which a cutting blade is arranged on a spherical surface by forming the cutting blade to have a different angle of the cutting blade in a plurality of areas. Rigidity is enhanced in one area, thereby improving the durability of the cutting tool. Cutting resistance is reduced in the other area, thereby improving working efficiency by preventing the cutting tool from moving back and vibrating.</p> |
