Cutting insert, cutting tool, and method of manufacturing machined product using them

摘要

A cutting insert having an upper surface, a lower surface, a side surface with a first side surface and a second side surface which are connected to each of the upper and lower surfaces, and are adjacent to each other is provided. The insert includes a cutting edge having a major cutting edge located along an intersection of the upper surface and the first side surface, and a minor cutting edge lying along an intersection of the first side surface and the second side surface. The first side surface includes a first constraining surface located at a middle region in a thickness direction of the first side surface, and a rake surface which is located recessed between the first constraining surface and the major cutting edge. A distance between the major cutting edge and the first constraining surface is increased toward the minor cutting edge in a side view.

主权项

1. A cutting insert, comprising:
an upper surface; a lower surface; a side surface which is connected to each of the upper surface and the lower surface and comprises a first side surface and a second side surface being adjacent to each other; and a cutting edge comprising a major cutting edge lying along an intersection of the upper surface and the first side surface, and a minor cutting edge lying along an intersection of the first side surface and the second side surface, wherein the first side surface comprises
a first constraining surface located at a middle region in a thickness direction, anda rake surface which is located between the first constraining surface and the major cutting edge, and is recessed with respect to the first constraining surface and the major cutting edge, a distance between the major cutting edge and the first constraining surface increases in the direction of the minor cutting edge in a side view, and a longitudinal direction of the first constraining surface is inclined with respect to the major cutting edge in a side view.