| 摘要 |
The insert has a triangular basic form defined by upper and lower sides and circular side surfaces that forms main and auxiliary cutting edges. The auxiliary edges have concave and convex cutting sections. The auxiliary edges have the characteristic such as concaves with preset radii (R1, R2), convexes with preset radii (R, r) and concave with a middle radius (R3) based on convex transition radius (r1) of the main cutting edges. |
