CUTTING INSERT, CUTTING TOOL, AND METHOD OF MANUFACTURING MACHINED PRODUCT USING THEM

摘要

In a cutting insert according to an embodiment of the present invention, an upper surface includes: a first concave groove which is continuous with a first cutting edge and extends along a longitudinal direction; a pair of second concave grooves which are respectively continuous with a pair of second cutting edges and extend along the longitudinal direction; and a pair of protruded parts respectively located between the first concave groove and the pair of second concave grooves. The pair of protruded parts are respectively continuous with an end surface cutting edge and are separated from each other by a larger distance therebetween as separating from the end surface cutting edge. A cutting tool with the cutting insert, and a method of manufacturing a machined product by using the cutting tool are also provided.

主权项

1. A cutting insert, comprising:
an upper surface; a lower surface; a pair of side surfaces located on both sides in a longitudinal direction; an end surface located at a front end in the longitudinal direction; and a cutting edge located from a first intersecting line of the upper surface and the end surface to a pair of second intersecting lines which are respectively intersecting lines of the upper surface and the pair of side surfaces, wherein the cutting edge comprises an end surface cutting edge which is located on the first intersecting line and comprises a concave-shaped first cutting edge and a pair of second cutting edges located on both sides of the first cutting edge in an end surface view, the upper surface comprises a first concave groove which is connected to the first cutting edge and extends along the longitudinal direction, a pair of second concave grooves which are respectively connected to the second cutting edges and extend along the longitudinal direction, and a pair of protruded parts respectively located between the first concave groove and the pair of second concave grooves, and the pair of protruded parts are respectively continuous with the end surface cutting edge and separated from each other by a larger distance therebetween as separating from the end surface cutting edge.