| 摘要 |
The present invention relates to a cutting insert. The cutting insert, according to one embodiment of the present invention, comprises: a top surface and a bottom surface; side surfaces which connect the top surface and the bottom surface to each other; a hole which penetrates the top surface and the bottom surface; and a cutting blade which is defined by the top surface and the side surfaces, wherein a main cutting blade side surface among the side surfaces is provided with a first relief surface, a transition surface extending from the first relief surface, and a second relief surface extending from the transition surface, the first relief surface is formed such that the relief angle or the relief surface width varies according to the cutting blade, and the transition surface is provided with a plurality of ridges in order to reinforce the rigidity of the cutting blade. |
