Patent ID: 8419320
Filing Date: 2013-04-16
Classification: B23C,Y10T

Abstract:
1. A cutting tool for milling works including a cutting insert which is perpendicularly and penetratingly formed with a circular opening in its center, a cutter body on which the cutting insert is mounted, and a coupling means to secure the cutting insert to the cutter body, the cutting insert comprising: an upper surface and a lower surface; a lateral surface connecting the upper surface and the lower surface; wherein the upper or the lower surface meets the lateral surface to form a major cutting edge; and wherein at least one major cutting edge is provided with one or more concave nick cutting edges, wherein the cutting insert is a two-sided type insert of which upper and lower surfaces perform a cutting work; and wherein the insert includes a corner lateral surface to connect the neighboring lateral surfaces and a minor lateral surface to connect the corner lateral surface at the opposite sides of the corner lateral surface, wherein the upper surface or the lower surface meets the minor lateral surface to form a minor cutting edge, wherein a corner cutting edge to connect the major cutting edge and the minor cutting edge is formed between the minor cutting edge and the major cutting edge, and wherein a circular opening which penetrates into the center of the upper surface and the lower surface is provided.