Cutting insert holder and applications thereof

Patent metadata

Field	Value
Publication number	US-11117203-B2
Application number	US-201816227856-A
Country	US
Kind code	B2
Filing date	Dec 20, 2018
Priority date	Dec 20, 2018
Publication date	Sep 14, 2021
Grant date	Sep 14, 2021

Abstract

Holders are described herein providing secure clamping and/or positioning of cutting inserts. Briefly, a holder for a cutting insert comprises a base and a slot for receiving the cutting insert, wherein the slot forms an angle with the base ranging from 10 degrees to 60 degrees.

First claim

The invention claimed is:

1. A holder for a cutting insert comprising:
a base; and
a first wall and a second wall spaced apart from and opposing the first wall forming a slot for receiving the cutting insert, the slot comprising first and second opposing side openings between the first wall and the second wall, the first and second opposing side openings extending from a top of the holder to an aperture in first and second walls of the holder, wherein the slot forms an angle with the base ranging from 10 degrees to 60 degrees, and wherein the slot orients a nose of the cutting insert to engage a workpiece for tangential cutting.

2. The holder of claim 1 , wherein the angle ranges from 20 degrees to 35 degrees.

3. The holder of claim 1 , wherein the angle places the cutting insert in an orientation to exhibit an included angle of at least 80 degrees.

4. The holder of claim 1 , wherein the base and slot are formed in the head of a tangential cutting apparatus.

5. The holder of claim 1 , wherein dimensions of the slot accommodate cutting inserts having one or more dimensions smaller than cutting insert dimensions according to the International Organization for Standardization (ISO).

6. The holder of claim 1 , wherein the base is configured to engage a pocket of a tangential cutting apparatus.

7. The holder of claim 6 , wherein the holder further comprises a recess for engaging a clamp.

8. The holder of claim 1 further comprising the cutting insert.

9. The holder of claim 8 , wherein the cutting insert comprises a superhard material selected from the group consisting of polycrystalline cubic boron nitride (PcBN) and polycrystalline diamond (PCD).

10. The holder of claim 1 , wherein the slot has a diamond shape cross-sectional shape.

11. A tangential cutting apparatus comprising:
a cutting head; and
at least one holder for a cutting insert, the holder comprising a base, and a first wall and a second wall spaced apart from and opposing the first wall forming a slot for receiving the cutting insert, the slot comprising first and second opposing side openings between the first wall and the second wall, the first and second opposing side openings extending from a top of the holder to an aperture in first and second walls of the holder, wherein the slot forms an angle with the base ranging from 10 degrees to 60 degrees, and wherein the slot orients a nose of the cutting insert to engage a workpiece for tangential cutting.

12. The tangential cutting apparatus of claim 11 , wherein the angle ranges from 20 to 35 degrees.

13. The tangential cutting apparatus of claim 11 , wherein the angle places the cutting insert in an orientation to exhibit an included angle of at least 80 degrees.

14. The tangential cutting apparatus of claim 11 , wherein the base and slot are formed in the cutting head.

15. The tangential cutting apparatus of claim 11 , wherein the cutting head comprises a pocket for receiving the holder.

16. The tangential cutting apparatus of claim 15 , wherein the holder is mechanically secured to the pocket.

17. The tangential cutting apparatus of claim 11 further comprising the cutting insert in the slot.

18. The tangential cutting apparatus of claim 17 , wherein the cutting insert comprises a superhard material selected from the group consisting of polycrystalline cubic boron nitride (PcBN) and polycrystalline diamond (PCD).

19. The tangential cutting apparatus of claim 11 , wherein the apparatus is a milling cutter.

20. The tangential cutting apparatus of claim 11 , wherein the slot has a diamond shape cross-sectional shape.

21. A method of machining a workpiece comprising:
providing a tangential cutting apparatus comprising a cutting head and at least one holder engaging a cutting insert, the holder comprising a base, and a first wall and a second wall spaced apart from and opposing the first wall forming a slot for receiving the cutting insert, the slot comprising first and second opposing side openings between the first wall and the second wall, the first and second opposing side openings extending from a top of the holder to an aperture in first and second walls of the holder, wherein the slot forms an angle with the base ranging from 10 degrees to 60 degrees; and
contacting the workpiece with a nose of the cutting insert for tangential cutting.

22. The method of claim 21 , wherein the base and slot are formed in the cutting head.

23. The method of claim 21 , wherein the cutting head comprises a pocket for receiving the holder.

24. The method of claim 21 , wherein the slot has a diamond shape cross-sectional shape.

25. The method of claim 21 , wherein the angle places the cutting insert in an orientation to exhibit an included angle of at least 80 degrees.

Assignees

• Kennametal Inc

Inventors

• Kaufmann Igor
• Benamor Raouf
• Musil John
• Pinnoju Shiva

Classifications

• B23C5/2298 Primary

  secured by resilient/flexible means · CPC title

• B23C5/2213 Primary

  having a special shape · CPC title

• B23C2200/367

  Mounted tangentially, i.e. where the rake face is not the face with largest area · CPC title

• B23C2220/00

  Details of milling processes · CPC title

• B23C2210/168

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