Cutting insert and cutting tool

Patent metadata

Field	Value
Publication number	US-10343226-B2
Application number	US-201615765200-A
Country	US
Kind code	B2
Filing date	Dec 21, 2016
Priority date	Sep 27, 2016
Publication date	Jul 9, 2019
Grant date	Jul 9, 2019

Abstract

A cutting insert comprises: a first end surface and a second end surface which are opposed to each other; a peripheral side surface which extends so as to connect the first end surface and the second end surface; a first cutting edge which is arranged in an intersecting edge between the first end surface and the peripheral side surface; and a second cutting edge which is arranged in an intersecting edge between the second end surface and the peripheral side surface. The peripheral side surface includes a first flank which is connected to the first cutting edge and an intermediate peripheral side surface portion which is arranged closer to the second end surface than the first flank. The first flank extends in a direction perpendicular to the first end surface. The intermediate peripheral side surface portion protrudes outward from the first flank.

First claim

What is claimed is:

1. A cutting insert comprising:
a first end surface and a second end surface which are opposed to each other;
a peripheral side surface which extends so as to connect the first end surface and the second end surface;
a first cutting edge which is arranged in an intersecting edge between the first end surface and the peripheral side surface; and
a second cutting edge which is arranged in an intersecting edge between the second end surface and the peripheral side surface, wherein:
the peripheral side surface includes a first flank which is connected to the first cutting edge and an intermediate peripheral side surface portion which is arranged closer to the second end surface than the first flank;
the first flank extends in a direction perpendicular to the first end surface; and
the intermediate peripheral side surface portion protrudes outward from the first flank.

2. The cutting insert according to claim 1 , wherein:
the peripheral side surface includes a second flank which is connected to the second cutting edge;
the second flank extends in a direction perpendicular to the second end surface; and
the intermediate peripheral side surface portion protrudes outward from the second flank.

3. The cutting insert according to claim 1 , wherein the second cutting edge is 180-degree rotationally symmetrical with the first cutting edge.

4. The cutting insert according to claim 1 , wherein, as viewed from a direction facing the first end surface, an amount of protrusion B of the intermediate peripheral side surface portion from the first flank is from 0.02 mm to 3 mm.

5. The cutting insert according to claim 1 , wherein a width C of the first flank in a direction in which the first end surface and the second end surface are opposed to each other is from 0.2 mm to 4 mm.

6. The cutting insert according to claim 1 , wherein a contour shape of the second end surface is not mirror symmetrical.

7. A cutting tool comprising the cutting insert according to claim 1 mounted thereon.

Assignees

• Tungaloy Corp

Inventors

• Yoshida Satoru
• Morita Keisuke

Classifications

• B23C2200/0477

  Triangular · CPC title

• B23C2200/243

  bevelled or chamfered · CPC title

• B23C2210/168

  Seats for cutting inserts, supports for replacable cutting bits · CPC title

• B23C5/20

  with removable cutter bits or teeth {or cutting inserts} · CPC title

• B23C2210/165

  Fixation bolts · CPC title