Articulating joint with a high wear life

Patent metadata

Field	Value
Publication number	US-11242890-B2
Application number	US-201816026183-A
Country	US
Kind code	B2
Filing date	Jul 3, 2018
Priority date	Jul 3, 2018
Publication date	Feb 8, 2022
Grant date	Feb 8, 2022

Abstract

An articulating joint includes a linkage and a pin. The linkage includes a surface defining an opening. The pin extends along a pivot axis, and is disposed, at least in-part, in the hole. The pin has a core component made of a first material, and an outer component that at least partially circumferentially surrounds the core component and is made of a wear resistant material. The outer component includes a gradated sub-surface depth extending in a radial direction.

First claim

What is claimed is:

1. An articulating joint comprising:
a first linkage including a surface defining an opening; and
a pin extending along a pivot axis and disposed at least in-part in the opening, the pin including a core component made of a first material and an outer component that at least partially circumferentially surrounds the core component and is made of a wear resistant material, the outer component including an outer surface having a concentration of wear resistant material, wherein the concentration of wear resistant material decreases from the outer surface radially inwardly into the outer component.

2. The articulating joint set forth in claim 1 , wherein the pin is cylindrical and the core component is non-cylindrical.

3. The articulating joint set forth in claim 1 , wherein the outer component is additive manufactured onto the core component.

4. The articulating joint set forth in claim 3 , wherein the core component is cast.

5. The articulating joint set forth in claim 4 , wherein the pin is cylindrical and the core component is non-cylindrical.

6. The articulating joint set forth in claim 5 , wherein the first material is a base metal and the wear resistant material includes a wear resistant alloy.

7. The articulating joint set forth in claim 6 , wherein the wear resistant alloy includes at least one of cobalt and nickel.

8. The articulating joint set forth in claim 5 , wherein the first material is a base metal and the wear resistant material includes a ceramic.

9. The articulating joint set forth in claim 2 , wherein the pin is a portion of a wastegate crank and the linkage is a wastegate rod of an automotive turbocharger.

10. The articulating joint set forth in claim 3 , wherein the outer component includes a plurality of layers including an outer layer and an inner layer, wherein the concentration of wear resistant material decreases in each of the plurality of layers from the outer later toward the inner layer.

11. The articulating joint set forth in claim 10 , wherein the inner layer is directly attached to the core component.

12. The articulating joint set forth in claim 11 , wherein the first material is a base metal and the concentration of wear resistant material is represented by a ratio of the wear resistant material over the base metal, and the wear resistant material is an alloy.

13. The articulating joint set forth in claim 12 , wherein the alloy includes at least one of cobalt and nickel.

14. The articulating joint set forth in claim 11 , wherein the first material is a base metal and the wear resistant material includes a ceramic.

15. The articulating joint set forth in claim 1 , wherein the core component includes a circumferentially continuous face that defines a fill region opened in a radially outward direction, and the fill region is filled with the wear resistant material.

16. The articulating joint set forth in claim 15 , wherein the wear resistant material is applied via an additive manufacturing process.

17. The articulating joint set forth in claim 15 , wherein the pin is cylindrical and the wear resistant material region is circumferentially discontinuous.

18. A process of manufacturing an articulating joint comprising:
determining wear regions of a pin of the articulating joint, the pin having an outer surface;
forming a core component of the pin including fill regions associated with the wear regions; and
filling the fill regions with a wear resistant material via an additive manufacturing process, the wear resistant material having a concentration at the outer surface, wherein the concentration of wear resistant material decreases radially inwardly from the outer surface into the pin.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Swartz Julie A
• Gray Alyn M
• Brady Grant W
• Li Zhe

Classifications

• B33Y80/00 Primary

  Products made by additive manufacturing · CPC title

• B22F10/25

  Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS] · CPC title

• F16C11/04 Primary

  Pivotal connections (hinges for doors, windows or wings E05D) · CPC title

• F02B37/186 Primary

  Arrangements of actuators or linkage for bypass valves · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title