Cutting insert, cutting tool and cutting method for workpiece using the same

摘要

A cutting insert has a main body which is provided with an upper surface, a side surface, at least one groove which is formed in the side surface and which extends to the upper surface at one end, and a plurality of split cutting blades which are split by the at least one groove. The upper surface is provided with inclined portions corresponding to the split cutting blades. The distance of respective lower ends of the inclined portions from the corresponding split cutting blades increases toward the centers of the corresponding cutting blades in a plan view. A cutting tool having the cutting insert and a method for cutting a workpiece using the cutting tool are also provided.

主权项

1. A cutting insert, comprising:
a main body comprising
an upper surface,a side surface,a groove that is formed on the side surface and extends to the upper surface at one end thereof, anda plurality of divided cutting edges that are located at an intersection line of the upper surface and the side surface and divided by the groove, wherein the upper surface comprises inclined parts located corresponding to the divided cutting edges, the inclined parts being in higher positions as being away from the intersection line, and a distance of lower ends of the inclined parts from the corresponding divided cutting edges increases toward centers of the corresponding divided cutting edges from ends of the corresponding divided cutting edges in a top plan view.