Bearing component part and a method to form a bearing component

Patent metadata

Field	Value
Publication number	US-9694439-B2
Application number	US-201414783455-A
Country	US
Kind code	B2
Filing date	Apr 7, 2014
Priority date	Apr 12, 2013
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

A bearing component part for use in a diffusion welding process, comprising a core part presenting a first circumferential surface, at least one annular part presenting a second circumferential surface, wherein the core part and the annular part are attached to and along each other in a circumferential manner through their first circumferential surface and second circumferential surface. The at least one annular part is substantially u-shaped in a cross sectional view, comprising two opposing sides connected by a base side together forming a space. The at least one annular part is arranged to receive a first material in the space formed by the u-shape.

First claim

The invention claimed is:

1. A bearing component part for use in a diffusion welding process, comprising:
a core part presenting a first circumferential surface; and
at least one annular part presenting a second circumferential surface,
wherein the core part and the annular part are attached to and along each other in a circumferential manner through the first and second circumferential surfaces,
wherein the at least one annular part is substantially u-shaped in a cross sectional view, comprising two opposing sides connected by a base side together forming a space,
wherein the at least one annular part is arranged to receive a first material in the space formed by the u-shape.

2. The bearing component part for according to claim 1 , wherein the second circumferential surface of the annular part being connected to the core part, is one of the opposing sides of the u-shape.

3. The bearing component part for according to claim 1 , wherein the second circumferential surface of the annular part being connected to the core part is the base side of the u-shape.

4. The bearing component part according to claim 1 , wherein the annular part is a low carbon steel.

5. The bearing component part according to claim 1 , wherein the annular part is a low carbon steel having a carbon content of less than 0.3%.

6. The bearing component part according to claim 1 , wherein the annular part is a ferritic steel.

7. The bearing component part according to claim 1 , wherein the annular part is a sheet metal.

8. The bearing component part according to claim 1 , wherein the thickness of the annular part is 0.5-10 mm.

9. The bearing component part according to claim 1 , wherein the core part comprises a cast iron.

10. The bearing component part according to claim 1 , wherein the core part comprises a cast iron with a carbon content of at least 2 wt %.

11. The bearing component part according to claim 1 , wherein the core part is a cast steel.

12. The bearing component part according to claim 1 , wherein the core part is a cast steel with a carbon content of 0.5 wt % or less.

13. A method to form a bearing component by diffusion welding, the method comprising steps of:
providing a bearing component part, the bearing component part comprising:
a core part presenting a first circumferential surface; and
at least one annular part presenting a second circumferential surface,
wherein the core part and the annular part are attached to and along each other in a circumferential manner through the first and second circumferential surfaces,
wherein the at least one annular part is substantially u-shaped in a cross sectional view, comprising two opposing sides connected by a base side together forming a space,
wherein the at least one annular part is arranged to receive a first material in the space formed by the u-shape,
placing a first material in the space formed by the u-shaped annular part,
sealing the space formed by the u-shaped annular part, creating a closed space,
performing the diffusion welding process.

14. The method according to claim 13 , wherein the first material and the core part material presents a carbon potential at the temperature of joining.

15. The method according to claim 13 , wherein the first material is a high cleanliness steel.

16. The method according to claim 13 , wherein the first material is any of:
M50,
M50 NIL,
XD15NW,
Bearing steel as shown in ISO 683-17:1999 pages 9,
Stainless tool steel,
Stainless steel suitable for martensitic hardening,
N-alloyed stainless steel, suitable for martensitic hardening,
Stainless steel suitable for surface enrichment and martensitic hardening.

17. The method according to claim 13 , wherein the method is accomplished by hot isostatic pressing.

18. The method according to claim 13 , wherein the first material is in powder form before heating.

19. The method according to claim 13 , wherein the bearing component is any one of:
an inner ring of a bearing,
an outer ring of the bearing, or
a roller of a roller bearing.

20. The method according to claim 13 , wherein at least one of the opposing sides and the base side of the u-shaped annular part is subsequently removed from the bearing component.

21. The method according to claim 20 , wherein the removal of at least one of the opposing sides and the base side of the u-shaped annular part is made by one of:
a subsequent grinding step, or
a subsequent cutting step.

22. A bearing component formed by using the bearing component part, the bearing component comprising:
a core part presenting a first circumferential surface; and
at least one annular part presenting a second circumferential surface,
wherein the core part and the annular part are attached to and along each other in a circumferential manner through the first and second circumferential surfaces,
wherein the at least one annular part is substantially u-shaped in a cross sectional view, comprising two opposing sides connected by a base side together forming a space,
wherein the at least one annular part is arranged to receive a first material in the space formed by the u-shape.

Assignees

• Strandell Ingemar
• Skf Ab

Inventors

• Strandell Ingemar

Classifications

• F16C33/62

  Selection of substances · CPC title

• B23K20/023 Primary

  Thermo-compression bonding · CPC title

• B23K2203/18

  Operations & Transport · mapped topic

• B23K20/227

  with ferrous layer · CPC title

• F16C33/34

  Rollers; Needles · CPC title