Cutting insert, cutting tool, and method of producing machined product

Patent metadata

Field	Value
Publication number	US-10005142-B2
Application number	US-201314443419-A
Country	US
Kind code	B2
Filing date	Nov 27, 2013
Priority date	Nov 27, 2012
Publication date	Jun 26, 2018
Grant date	Jun 26, 2018

Abstract

A cutting insert according to an embodiment of the present invention has an upper surface, a lower surface, a side surface connected to each of the upper surface and the lower surface, and a cutting edge located along an intersection of the upper surface and the side surface. The upper surface has a land surface disposed along the cutting edge, a rake surface which is located further inside than the land surface and is inclined so as to have a smaller height as departing from the land surface, and a bottom surface located further inside than the rake surface. The rake surface has a projection-shaped first region and a concave-shaped second region which are alternately disposed along the bottom surface. The first region has a first recess that reaches the second region adjacent to the first region.

First claim

The invention claimed is:

1. A cutting insert, comprising:
an upper surface;
a lower surface;
a side surface connected to each of the upper surface and the lower surface; and
a cutting edge located along an intersection of the upper surface and the side surface,
wherein the upper surface comprises a land surface disposed along the cutting edge, a rake surface which is located further inside than the land surface and is inclined so as to have a smaller height from the lower surface as departing from the land surface, and a bottom surface located further inside than the rake surface,
wherein the rake surface comprises a plurality of first regions and a plurality of second regions which are alternately disposed along the bottom surface,
wherein the plurality of second regions have a larger inclination angle than the plurality of first regions and are concave areas on the rake surface, and
wherein the first region comprises a first recess extended along the cutting edge, and
wherein the first recess reaches each of a pair of the second regions adjacent to the first region.

2. A cutting insert, comprising:
an upper surface;
a lower surface;
a side surface connected to each of the upper surface and the lower surface; and
a cutting edge located along an intersection of the upper surface and the side surface,
wherein the upper surface comprises a land surface disposed along the cutting edge, a rake surface which is located further inside than the land surface and is inclined so as to have a smaller height from the lower surface as departing from the land surface, and a bottom surface located further inside than the rake surface,
wherein the rake surface comprises a plurality of first regions and a plurality of second regions which are alternately disposed along the bottom surface,
wherein the plurality of second regions have a larger inclination angle than the plurality of first regions and are concave areas on the rake surface,
wherein the first region comprises a first recess extended along the cutting edge, and
wherein the first region comprises a second recess which is connected to the first recess and is located between the land surface and the first recess.

3. The cutting insert according to claim 2 , wherein the second recess has a larger width as going from the first recess to the land surface.

4. The cutting insert according to claim 2 , wherein the first region comprises a plurality of the second recesses.

5. The cutting insert according to claim 2 , wherein the second recess is away from the land surface.

6. A cutting tool, comprising:
a holder having a plurality of insert pockets on a front end side of an outer periphery of the holder; and
a cutting insert according to claim 1 to be attached to the insert pockets so that the cutting edge projects sidewardly of the holder.

7. A method of producing a machined product, comprising:
rotating a cutting tool according to claim 6 ;
bringing the cutting edge of the cutting tool being rotated into contact with a workpiece; and
separating the cutting tool from the workpiece.

Assignees

• Kyocera Corp

Inventors

• Deguchi Shin

Classifications

• B23C2200/045

  Round · CPC title

• B23C5/205 Primary

  characterised by chip-breakers of special form · CPC title

• B23C5/20

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

• B23C5/109 Primary

  with removable cutting inserts · CPC title

• B23C2200/081

  with projections · CPC title