Laser brazing of annular metal seal member on track link

Patent metadata

Field	Value
Publication number	US-10040495-B2
Application number	US-201514962409-A
Country	US
Kind code	B2
Filing date	Dec 8, 2015
Priority date	Dec 8, 2015
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

A method of manufacturing an undercarriage track joint assembly includes forming at least a first portion of a seal assembly by laser brazing an annular, metal sealing washer to a first track link of the undercarriage track joint assembly. The method may also include performing the laser brazing to form at least one of an annular fillet of braze material between the first track link and at least a portion of an inner diameter surface of the washer and an annular fillet of braze material between the first track link and at least a portion of an outer diameter surface of the washer. The method may still further include inserting a second portion of the seal assembly into a counterbore formed in an axial face of a second track link of the track joint assembly such that an axial sealing face of the washer opposite from the first track link slidably engages with the second portion of the seal assembly on the second track link of the track joint assembly to form a sealing surface between the first and second track links.

First claim

What is claimed is:

1. A method of manufacturing an undercarriage track joint assembly, the method comprising:
forming at least a first portion of a seal assembly by laser brazing an annular, metal sealing washer to a first track link of the undercarriage track joint assembly;
performing the laser brazing to form at least one of an annular fillet of braze material between the first track link and at least a portion of an inner diameter surface of the washer and an annular fillet of braze material between the first track link and at least a portion of an outer diameter surface of the washer; and
inserting a second portion of the seal assembly into a counterbore formed in an axial face of a second track link of the track joint assembly such that an axial sealing face of the washer opposite from the first track link slidably engages with the second portion of the seal assembly on the second track link of the track joint assembly to form a sealing surface between the first and second track links.

2. The method of claim 1 , further including providing the annular metal sealing washer with a chamfer extending at least partially along at least one of the inner diameter surface and the outer diameter surface of the washer.

3. The method of claim 2 , wherein the chamfer extends at least partially along at least one of the inner diameter surface and the outer diameter surface of the washer from an axial supporting face of the washer opposite from the axial sealing face of the washer.

4. The method of claim 2 , further including providing the annular metal sealing washer with a chamfer extending at least partially along one of the inner diameter surface and the outer diameter surface of the washer, and with the other of the inner diameter surface and the outer diameter surface of the washer forming an acute included angle with an axial supporting face of the washer opposite from the axial sealing face of the washer.

5. The method of claim 1 , further including performing the laser brazing to form one of the at least one annular fillet of braze material with a top surface of the annular fillet extending substantially parallel to the axial sealing face of the washer.

6. The method of claim 5 , wherein the one of the at least one annular fillet of braze material is formed in approximately the shape of an isosceles triangle with the top surface of the annular fillet forming a base of the isosceles triangle, and the width of the base being one of approximately equal to or within ±20% of the altitude of the isosceles triangle formed by a perpendicular bisector of the base.

7. The method of claim 1 , further including performing the laser brazing to form one of the at least one annular fillet of braze material at an intersection between an axial supporting face of the washer opposite from the axial sealing face of the washer and one of the inner diameter surface or the outer diameter surface of the washer.

8. The method of claim 1 , further including performing the laser brazing with the annular metal sealing washer held in position relative to the first track link such that one of the inner diameter surface or the outer diameter surface of the washer is spaced from an annular shoulder formed in the first track link by an amount that is less than a thickness of the washer.

9. The method of claim 8 , wherein the washer is held in a position spaced from the annular shoulder of the first track link by one of a plurality of tack welds spaced around the circumference of the washer or a fixture configured to maintain the washer at a desired spacing from the annular shoulder of the first track link during laser brazing of the annular fillets of brazing material.

10. A method of manufacturing a seal assembly for an undercarriage track joint assembly, the method comprising:
forming at least a first portion of the seal assembly for engagement within a counterbore formed in an axial face of a first track link of the undercarriage track joint assembly;
laser brazing an annular, metal sealing washer to a second track link of the undercarriage track joint assembly such that the washer is positioned on an axial end face of the second track link with an axial sealing face of the washer configured to be slidably engaged with the first portion of the seal assembly when the first and second track links are assembled into the undercarriage track joint assembly; and
performing the laser brazing to form at least one of an annular fillet of braze material between the second track link and at least a portion of an inner diameter surface of the washer and an annular fillet of braze material between the second track link and at least a portion of an outer diameter surface of the washer.

11. The method of claim 10 , further including providing the annular metal sealing washer with a chamfer extending at least partially along at least one of the inner diameter surface and the outer diameter surface of the washer.

12. The method of claim 11 , wherein the chamfer extends at least partially along at least one of the inner diameter surface and the outer diameter surface of the washer from an axial supporting face of the washer opposite from the axial sealing face of the washer.

13. The method of claim 11 , further including providing the annular metal sealing washer with a chamfer extending at least partially along one of the inner diameter surface and the outer diameter surface of the washer, and with the other of the inner diameter surface and the outer diameter surface of the washer forming an acute included angle with an axial supporting face of the washer opposite from the axial sealing face of the washer.

14. The method of claim 10 , further including performing the laser brazing to form one of the at least one annular fillet of braze material with a top surface of the annular fillet of braze material extending substantially parallel to the axial sealing face of the washer.

15. The method of claim 14 , wherein the one of the at least one annular fillet of braze material is formed in approximately the shape of an isosceles triangle with the top surface of the annular fillet forming a base of the isosceles triangle, and the width of the base being one of approximately equal to or within ±20% of the altitude of the isosceles triangle formed by a perpendicular bisector of the base.

16. The method of claim 10 , further including performing the laser brazing to form one of the at least one annular fillet of braze material at an intersection between an axial supporting face of the washer opposite from the axial sealing face of the washer and one of the inner diameter surface or the outer diameter surface of the washer.

Assignees

• Caterpillar Inc

Inventors

• Marchione Thierry Andre
• Widder Brent David
• Thorson Timothy Arthur
• Kaufmann Gregory Jerome

Classifications

• B23K1/19

  taking account of the properties of the materials to be soldered · CPC title

• B23K1/0008

  specially adapted for particular articles or work · CPC title

• B23K2101/30

  Chains, hoops or rings · CPC title

• B62D55/205

  Connections between track links · CPC title

• B62D55/21

  Links connected by transverse pivot pins · CPC title