Closed socket brazed joint assembly

Patent metadata

Field	Value
Publication number	US-11420280-B2
Application number	US-201916245918-A
Country	US
Kind code	B2
Filing date	Jan 11, 2019
Priority date	Jan 11, 2019
Publication date	Aug 23, 2022
Grant date	Aug 23, 2022

Abstract

A closed socket brazed joint assembly is provided. The assembly comprises: a first member composed of a first base material; a second member composed of a second base material with a first end composed of a first profile with at least first and second faying surfaces; a socket formed in said first member configured to receive the first end of the second member with a faying surface with at least two portions separated by a first fillet; wherein the socket further is configured such that in a first state before the application of energy to the joint there is a gap with a width between the faying surfaces of the first member and the faying surfaces of the second member; and, in the first state a slug of brazing fill material is disposed between the first end of the second member and at least one faying surface of the socket; and, wherein a second state is created when upon application of energy the brazing fill material melts and flows from between first end of the second member and the at least one faying surface of the socket filling aforesaid gap between the faying surfaces of the first and second members.

First claim

What is claimed is:

1. A locomotive traction motor comprising:
a first member having a socket with a floor and opposing first and second side walls with the floor separated from each of the opposing first and second side walls by first fillets having a first radius between the floor and each of the opposing first and second side walls; and
a second member with a first end having first and second faying surfaces separated from each other by a third faying surface, the socket of the first member configured to receive the first end of the second member with the first end of the second member facing the floor of the first member in the socket, the first faying surface of the second member facing the first side wall of the first member, and the second faying surface of the second member facing the second side wall of the first member;
wherein the socket further is configured such that, in a first state before application of energy to a joint, there are gaps with widths between the opposing first and second side walls of the first member and the first and second faying surfaces of the second member, and, in the first state, a slug of brazing fill material is disposed between the first end of the second member and the floor of the socket in the first member; and
wherein a second state is created when, upon application of energy, the brazing fill material melts, flows from between the first end of the second member and the floor of the socket in the first member, and fills the gaps between the first and second faying surfaces of the second member and the opposing first and second side walls to form a closed socket brazed joint that joins the first and second members.

2. The locomotive traction motor of claim 1 , wherein, in the first state, a slug of flux material is disposed between
the first end of the second member and the slug of brazing fill material; or
between the slug of brazing fill material and one or more of the first or second side walls of the socket.

3. The locomotive traction motor of claim 1 , wherein the first radius of the first fillet is at least one of the widths of the gaps between the opposing first and second side walls of the first member and the first and second faying surfaces of the second member in the first state.

4. The locomotive traction motor of claim 1 , wherein the first fillet is between the first side wall and the floor of the first member, and further comprising:
at least one additional fillet having the first radius or a second radius and formed between the second side wall of the first member and the floor of the first member.

5. The locomotive traction motor of claim 4 ,
wherein the at least one additional fillet has the second radius that is at least one of the widths of the gaps in the first state.

6. The locomotive traction motor of claim 4 ,
wherein end points defining a surface of the at least one additional fillet are extended to form indexing guides configured to position the first and second side walls of the first member with the first and second faying surfaces of the second member.

7. The locomotive traction motor of claim 1 ,
wherein the first member comprises an annular ring and the second member comprises a conductor bar.

8. The locomotive traction motor of claim 1 ,
wherein a first volume of the slug of brazing fill material is twice a difference between a second volume of the socket and a third volume of a third portion of the first end of the second member that is in the socket.

9. The locomotive traction motor of claim 8 ,
wherein the first volume of the slug of brazing fill material is within a range of 1.8 to 2.2 times the difference between the second volume and the third volume.

10. The locomotive traction motor of claim 1 , further comprising:
an indexing guide configured to position the first and second faying surfaces of the second member in a pre-determined alignment with the opposing first and second side walls of the socket of the first member, the indexing guide also configured to position the second member to form an indexed closed socket brazed joint.

11. The locomotive traction motor of claim 10 , wherein the indexing guide is comprised of at least one of: a first surface, a contact surface, or a second surface.

12. The locomotive traction motor of claim 10 , wherein the indexing guide does not contact the first and second faying surfaces of the second member.

13. The locomotive traction motor of claim 10 , wherein the indexing guide is composed from at least one of: brazing fill material, flux, or material that vaporizes upon joint formation.

14. The locomotive traction motor of claim 10 , wherein the indexing guide is configured to increase available faying surface area.

15. A vehicle traction motor comprising:
a first member having a socket with a floor and opposing first and second side walls with a curved interface between the floor and each of the first side wall and the second side wall; and
a second member with a first end having a first profile with faying surfaces;
wherein the socket is configured such that, in a first state before application of energy to a joint, there is a gap between each of the first and second side walls of the first member and each of the faying surfaces of the second member, and, in the first state, a slug of brazing fill material is disposed between the first end of the second member and the floor of the socket; and
wherein a second state is created when, upon application of energy, the brazing fill material melts and flows from between the first end of the second member and fills the gap between each of the first and second side walls and the first and second faying surfaces of the socket to form a closed socket brazed joint that joins the first and second members.

16. The vehicle traction motor of claim 15 , wherein, in the first state, a slug of flux material is disposed between:
the first end of the second member and the slug of brazing fill material; or
between the slug of brazing fill material and the at least one of the first side wall or the second side wall of the socket.

17. The vehicle traction motor of claim 15 , wherein a radius of the curved interface is at least as large as a width of the gap between the first side wall of the first member and the first faying surface of the second member in the first state.

18. The vehicle traction motor of claim 15 ,
wherein end points defining a surface of the curved interface are extended to form indexing guides configured to position the first and second side walls of the first member with the first and second faying surfaces of the second member.

Assignees

• Transp Ip Holdings Llc

Inventors

• Apostolopoulos Andreas Athanassios
• Wayne James
• Frampton Alan Glenn
• Kessler Kyle
• Edara Ramesh

Classifications

• H02K15/33

  Connecting winding sections; Forming leads; Connecting leads to terminals · CPC title

• H02K15/023 Primary

  Cage rotors · CPC title

• B61C9/38

  Transmission systems in or for locomotives or motor railcars with electric motor propulsion (electrical features B60L) · CPC title

• B23K33/00

  Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby · CPC title

• B23K1/0008

  specially adapted for particular articles or work · CPC title