Cutting insert with micro-channels

Patent metadata

Field	Value
Publication number	US-9731354-B2
Application number	US-201414271554-A
Country	US
Kind code	B2
Filing date	May 7, 2014
Priority date	May 7, 2014
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

A cutting insert includes a body having an upper face, a lower face, a plurality of planar flank faces joining the upper and lower faces, and a plurality of curved flank faces joining the plurality of flank faces. A T-land is formed at a downward sloping angle with respect to the upper face. A cutting edge is formed at an intersection of a respective flank face and the T-land. A curved cutting edge is formed at an intersection of a respective curved flank face and the T-land. A micro-channel is formed in one of the flank faces, the curved flank faces and the T-land and proximate one of the cutting edge and the curved cutting edge.

First claim

What is claimed:

1. A cutting insert, comprising:
a body having an upper face, a lower face, a plurality of flank faces joining the upper and lower faces, and a plurality of curved flank faces joining the plurality of flank faces; a T-land formed at a downward sloping angle with respect to the upper face; a cutting edge formed at an intersection of a respective flank face and the T-land; a curved cutting edge formed at an intersection of a respective curved flank face and the T-land; and
a micro-channel formed in one of the flank faces, the curved flank faces and the T-land proximate one of the cutting edge and the curved cutting edge, the micro channel having a length L, a width, W, and a depth;
wherein at least one of the length, L, and the width, W, is in a range of between 3 μm and 100 μm; and
wherein the depth, of the micro channel is less than or equal to 0.01 mm.

2. The cutting insert of claim 1 , further comprising at least one micro-channel formed in both the flank faces and the T-land.

3. The cutting insert of claim 1 , further comprising at least one micro-channel formed in all the flank faces, the curved flank faces and the T-land.

4. The cutting insert of claim 1 , further comprising at least one micro-channel formed only in the flank face proximate the cutting edge.

5. The cutting insert of claim 1 , further comprising at least one micro-channel formed only in the curved flank face proximate to the curved cutting edge.

6. The cutting insert of claim 1 , further comprising at least one micro-channel formed only in the T-land proximate the curved cutting edge.

7. The cutting insert of claim 1 , further comprising at least one micro-channel formed only in the T-land proximate the cutting edge.

8. The cutting insert of claim 1 , wherein the micro-channel is rectangular in shape having a longitudinal axis.

9. The cutting insert of claim 8 , wherein the length, L, is between 5-50 times greater than the width, W.

10. The cutting insert of claim 8 , wherein the longitudinal axis is perpendicular to one of the planar cutting edge and the curved cutting edge.

11. The cutting insert of claim 1 , wherein the micro-channel is tear-drop in shape having a head portion and a tail portion.

12. The cutting insert of claim 11 , wherein the head portion is located at a greater distance from the curved cutting edge than the tail portion.

13. The cutting insert of claim 1 , wherein the micro-channel is in the form of a negative feature formed on the T-land, the negative feature being lower in elevation than the T-land and including a pair of opposing side walls and a bottom surface.

14. The cutting insert of claim 1 , wherein the micro-channel is in the form of a positive feature formed on the T-land, the positive feature being higher in elevation than the T-land and including a pair of opposing side walls and a top surface.

15. A cutting insert, comprising:
a body having an upper face, a lower face, a plurality of flank faces joining the upper and lower faces, and a plurality of curved flank faces joining the plurality of flank faces; a T-land formed at a downward sloping angle with respect to the upper face; a cutting edge formed at an intersection of a respective flank face and the T-land; a curved cutting edge formed at an intersection of a respective curved flank face and the T-land; and
a micro-channel formed in one of the flank faces, the curved flank faces and the T-land proximate one of the cutting edge and the curved cutting edge, the micro channel having a length L, a width, W, and a depth;
wherein at least one of the length, L, and the width, W, is in a range of between 3 μm and 100 μm; and
wherein the depth, of the micro channel is less than or equal to 0.01 mm; and
wherein the cutting insert is made of a superhard material selected from the group consisting of polycarbonate boron nitride, polycarbonate diamond, and ceramics.

Assignees

• Kennametal Inc

Inventors

• Kondameedi Naveen
• Ben Amor Raouf

Classifications

• B23B27/145 Primary

  characterised by having a special shape · CPC title

• B23B2226/125

  cubic [CBN] · CPC title

• Y10T407/24

  with chip breaker, guide or deflector · CPC title

• B23B2200/325

  by multiple chip-breaking grooves · CPC title

• Y10T29/49996

  Successive distinct removal operations · CPC title