Method for fabricating a single-piece part for a turbine engine by diffusion bonding

Patent metadata

Field	Value
Publication number	US-9199331-B2
Application number	US-201214117718-A
Country	US
Kind code	B2
Filing date	May 11, 2012
Priority date	May 18, 2011
Publication date	Dec 1, 2015
Grant date	Dec 1, 2015

Abstract

A method of fabricating a single-piece part for a turbine engine by diffusion bonding, the method including making a blank for the part around a mandrel, the blank including a plurality of coaxial and superposed annular layers of independent rings of metal wire that are stacked on one another around the mandrel, and subjecting the blank to hot isostatic pressing to obtain a single-piece part, and optionally machining the part.

First claim

The invention claimed is:

1. A method for fabricating a single-piece part for a turbine engine by diffusion bonding, the method comprising:
making a blank around a mandrel, the blank including at least one layer of metal wires;
subjecting the blank to a hot isostatic pressing to obtain a single-piece part; and
optionally machining the part,
wherein the at least one layer of metal wires in the blank includes rings independent from each other that are individually engaged around the mandrel and individually stacked on the mandrel.

2. A method according to claim 1 , wherein the rings are of a circular shape.

3. A method according to claim 2 , wherein the rings are pre-formed with said shape, prior to being engaged on the mandrel.

4. A method according to claim 1 , wherein the mandrel is of a cylindrical shape.

5. A method according to claim 1 , wherein the rings are closed rings.

6. A method according to claim 1 , wherein the rings are split at a zone around a circumference.

7. A method according to claim 1 , wherein an opening of each ring engaged on the mandrel is angularly offset relative to openings of adjacent rings around a longitudinal axis of the mandrel.

8. A method according to claim 1 , wherein the single-piece part is one of a single-piece shaft, a disk, or a bladed ring of a turbine engine.

9. A method according to claim 1 , wherein at least one annular layer of metal-coated ceramic fibers is arranged between two successive metal wire layers on the mandrel.

10. A method according to claim 1 , wherein the rings are engaged on the mandrel by being positioned at an end of the mandrel, on a same axis as the mandrel, and by being moved in translation along the mandrel, parallel to the longitudinal axis.

11. A method according to claim 1 , wherein:
the making the blank comprises making a plurality of coaxial and superposed annular layers; and,
each layer of metal wires includes independent rings that are engaged and stacked on the mandrel.

12. A method according to claim 1 wherein the rings are of a non-circular shape.

13. A method according to claim 1 , wherein the mandrel is of a non-cylindrical shape.

14. A method according to claim 12 , wherein the rings are pre-formed with said shape, prior to being engaged on the mandrel.

15. A method for fabricating a single-piece part for a turbine engine by diffusion bonding, the method comprising:
making a blank around a mandrel, the blank including at least on layer of metal wires;
subjecting the blank to a hot isostatic pressing to obtain a single-piece part; and
optionally machining the part,
wherein the at least one layer of metal wires in the blank includes rings independent from each other that are individually engaged around the mandrel and individually stacked on the mandrel, said rings being individually split at a zone around a circumference.

16. A method according to claim 15 , wherein the opening of each split ring engaged on the mandrel is angularly offset relative to openings of adjacent rings around a longitudinal axis of the mandrel.

Assignees

• Godon Thierry
• Dambrine Bruno Jacques Gerard
• Snecma

Inventors

• Godon Thierry
• Dambrine Bruno Jacques Gerard

Classifications

• F05D2300/614

  Fibres or filaments · CPC title

• Y10T29/49826

  Assembling or joining · CPC title

• Y10T29/49316

  Impeller making · CPC title

• B23P13/00

  Making metal objects by operations essentially involving machining but not covered by a single other subclass (making specific objects B23P15/00) · CPC title

• F05D2230/31

  Layer deposition · CPC title