Assembly of an outlet guide vane for an aircraft turbomachine using an inflatable bladder

Patent metadata

Field	Value
Publication number	US-11833628-B2
Application number	US-202017434044-A
Country	US
Kind code	B2
Filing date	Feb 21, 2020
Priority date	Feb 27, 2019
Publication date	Dec 5, 2023
Grant date	Dec 5, 2023

Abstract

A method of assembling a member and a cap of a vane using a tool which allows the application of a pressing force of the cap against the member during a step of polymerisation by heating a resin for bonding these components. To this end, the tool includes an inflatable bladder and a pocket which surrounds the bladder and the vane so that the inflated bladder applies the pressing force. The heating can be carried out by resistors which are mounted in the bladder and/or using a device for supplying external heat.

First claim

What is claimed is:

1. A method of assembling a vane for an outlet guide vane assembly of a twin-spool aircraft turbojet, the method comprising:
a step to deposit a polymerisable resin on a junction face of a body of the said vane,
a step to position a cap of the vane on said junction face covered with said resin such that an external face of the cap and an external face of the body together form an intrados of this vane,
a step to arrange an inflatable bladder in contact with the intrados of the vane,
a step to surround the bladder, the cap and the body with a pouch so as to hold the bladder in contact with the intrados such that the pouch is in contact with the bladder and the body,
a step to inflate the bladder thus held in contact with the intrados in order to apply a force on the cap to force the cap into contact with said junction face of the body, and
a heating step to polymerise the resin and thus fix the cap on the body of the vane.

2. The method according to claim 1 , wherein the heating step comprises heating the bladder using heating means internal to the bladder.

3. The method according to claim 1 , wherein the heating step comprises an external heat input.

4. An apparatus comprising a tooling adapted to perform the method according to claim 1 , the tooling comprising the inflatable bladder and the pouch, the pouch being adapted to hold the bladder in contact with the intrados so as to apply said force bringing the cap into contact with said junction face of the body.

5. The apparatus according to claim 4 , wherein the pouch is made of a non-stretch material.

6. The apparatus according to claim 4 , wherein the bladder comprises silicone.

7. The apparatus according to claim 4 , comprising an external heat supply device.

8. The apparatus according to claim 7 , wherein the external heat supply device is at least one of the following: an oven, a radiation heating device, or an induction heating device.

9. The apparatus according to claim 4 , wherein the bladder comprises one or more reinforcements arranged to protect it from sharp edges of the vane.

10. The apparatus according to claim 9 , wherein the bladder comprises one or more metal inserts forming one or more of said reinforcements.

11. The apparatus according to claim 9 , wherein one or more of said reinforcements consist of an overthickness of the bladder.

Assignees

• Safran Aircraft Engines

Inventors

• Bienvenu Steven Gérard Joseph
• Sirot Clément René Roger

Classifications

• B23P15/04 Primary

  turbine or like blades from several pieces · CPC title

• B29C65/4835 Primary

  Heat curing adhesives · CPC title

• B29C65/7805

  the parts to be joined comprising positioning features · CPC title

• B29C66/81455

  being a fluid inflatable bag or bladder, a diaphragm or a vacuum bag for applying isostatic pressure (inflatable element positioned between the joining tool and a backing-up part B29C66/82421) · CPC title

• F01D5/147

  Construction, i.e. structural features, e.g. of weight-saving hollow blades (F01D5/148, F01D5/16 and F01D5/20 take precedence; blade shape F01D5/141; blades with cooling or heating channels or cavities F01D5/18; heating, heat-insulating or cooling means on blades F01D5/18) · CPC title