| 摘要 |
The present invention relates to a cutting insert. The plane of the cutting insert is formed in a polygonal shape. Cutting blades are formed on one or more vertexes of the cutting insert. Multiple adhesion surfaces adhering to multiple locator surfaces formed on a tool holder are formed along two or more edges on the sides of the cutting insert to be fixed and used to the tool holder. Each of the adhesion surfaces of the cutting insert according to the present invention has a concave curvature so that the outer portion thereof touching one side of each locator surface can be stuck to the whole locator surface when the adhesion surface is pressed to the locator surface. According to the present invention, the cutting insert improves the fastening accuracy and strength to the tool holder as, when the cutting insert is fixed to the tool holder, the outer portion of each adhesion surface linearly touches one side of each locator surface of the tool holder in order to accurately determine the position of the cutting insert relative to the tool holder, and then the cutting insert is pressed further so that the adhesion surface completely adheres to the whole locator surface around the outer portion with linear touch by the elastic deformation of the locator surface because the adhesion surfaces have the convex curvature; and reduces manufacturing costs by not requiring the precise machining of the adhesion surfaces to correspond to the locator surfaces when the cutting insert is manufactured. |
