Structure for assembling a piece comprising a first metal part and a second part made of an organic matrix composite material

Patent metadata

Field	Value
Publication number	US-11904387-B2
Application number	US-202117999343-A
Country	US
Kind code	B2
Filing date	May 11, 2021
Priority date	May 20, 2020
Publication date	Feb 20, 2024
Grant date	Feb 20, 2024

Abstract

Piece comprising a first metal part and a second part in organic matrix composite material, wherein the first part has a first connecting portion and the second part has a second connecting portion, the second connecting portion having at least one through-hole, the second connecting portion being totally or partially sandwiched between the first connecting portion and a metal fastening element, the fastening element being fastened on the first part both onto the first connecting portion via the through-hole of the second connecting portion and onto a portion other than the first connecting portion, whereby the first part and the second part are fastened to each other.

First claim

The invention claimed is:

1. A piece comprising a first metal part and a second part in organic matrix composite material, wherein the first part has a first connecting portion and the second part has a second connecting portion, the second connecting portion having at least one through-hole, the second connecting portion being totally or partially sandwiched between the first connecting portion and a metal fastening element, the fastening element being fastened on the first part both onto the first connecting portion via the through-hole of the second connecting portion and onto a portion other than the first connecting portion, whereby the first part and the second part are fastened to each other.

2. The piece according to claim 1 , wherein the first connecting portion has at least one blind hole respectively extending in the continuation of at least one through-hole of the second connecting portion, the fastening element being fastened to the first connecting portion and extending into the blind hole.

3. The piece according to claim 2 , wherein the blind hole has an entrance, a bottom, a side wall extending between the entrance and the bottom and a geometric axis the side wall of the blind hole being inclined relative to the geometric axis of the blind hole to form a convergent from the entrance towards the bottom.

4. The piece according to claim 1 , wherein the through-hole has a side wall and a geometric axis, the side wall of the through-hole being inclined relative to the geometric axis of the through-hole to form a convergent from the fastening element towards the first connecting portion.

5. The piece according to claim 1 , wherein the first connecting portion comprises a shoulder configured to cooperate with the second connecting portion.

6. The piece according to claim 1 , wherein the fastening element is formed via additive manufacturing by cold gas spray deposition of a metal powder.

7. The piece according to claim 1 , wherein a protective layer is arranged between the fastening element and the second connecting portion.

8. The piece according to claim 1 , of general shape with rotational symmetry.

9. The piece according to claim 8 forming a combustion chamber jacket of a rocket engine.

10. A rocket engine comprising a combustion chamber jacket according to claim 9 .

Assignees

• Arianegroup Sas

Inventors

• Du Tertre Alban
• Guichard Didier

Classifications

• B22F10/25 Primary

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

• B22F5/008

  of engine cylinder parts or of piston parts other than piston rings (of piston rings B22F5/02) · CPC title

• B22F7/062

  involving the connection or repairing of preformed parts · CPC title

• F02K9/346

  Liners, e.g. inhibitors · CPC title

• F02K9/62

  Combustion or thrust chambers · CPC title