Method for the reconditioning and use of brake discs of the rear stator type with studs, assembled disc and corresponding stack of discs

Patent metadata

Field	Value
Publication number	US-9360063-B2
Application number	US-201414541466-A
Country	US
Kind code	B2
Filing date	Nov 14, 2014
Priority date	Nov 21, 2013
Publication date	Jun 7, 2016
Grant date	Jun 7, 2016

Abstract

A method for the reconditioning and use of brake discs of the rear stator type with studs. The method includes the steps of using a first disc ( 12 ) during a first life, using a second disc ( 112 ) during a first life, after the first life of the first disc and the first life of the second disc, machining a friction surface on one of the discs and a rear surface on the other of the discs so that one of the surfaces has at least one shoulder ( 17 ) and the other of the surfaces has at least one notch ( 118 ). Finally, the first disc is nested in the second disc such that the notch and the shoulder cooperate so as to center the discs.

First claim

The invention claimed is:

1. Method for the reconditioning and use of aircraft brake discs of the rear stator type with studs, the method comprising the steps of:
using a first disc ( 12 ) during a first life as the rear stator disc with studs from a first stack of brake discs, the first disc having an initial thickness at the start of the first life,
using a second disc ( 112 ) during a first life as the rear stator disc with studs from a second stack of brake discs, the second disc at the start of the first life being substantially identical to the first disc at the start of the first life,
after the first life of the first disc and the first life of the second disc, machining a friction surface ( 13 ) on one of the discs and a rear surface ( 114 ) on the other of the discs so that one of said surfaces comprises at least one shoulder ( 17 ) and the other of said surfaces comprises at least one notch ( 118 ) capable of cooperating with said shoulder,
nesting the first disc in the second disc such that the notch and the shoulder cooperate so as to centre the discs,
fixing the two discs to one another to form an assembled disc ( 212 ), the assembled disc having a thickness which is substantially identical to the initial thickness,
fixing studs to the assembled disc,
using the assembled disc during an additional life as the rear stator disc with studs from a third stack of brake discs.

2. Method according to claim 1 , in which the first disc ( 12 ) and the second disc ( 112 ) are machined so that the friction surface ( 113 ) carries the notch ( 118 ) and the rear surface ( 14 ) carries the shoulder ( 17 ).

3. Method according to claim 1 , in which the studs are fixed to the first disc ( 12 ) at the start of the first life by first rivets passing through drilled holes ( 16 ) of the first disc and in which studs are fixed to the second disc ( 112 ) at the start of the first life by second rivets passing through the drilled holes ( 116 ) of the second disc, the first disc and the second disc being machined so that each drilled hole of the first disc is respectively coaxial with one of the drilled holes of the second disc when the two discs are assembled, the studs thus being fixed to the assembled disc by third rivets successively passing through the drilled holes of the first disc, the drilled holes of the second disc and the studs, the third rivets thus also fixing the first disc to the second disc.

4. Method according to claim 3 , in which the first disc ( 12 ) and the second disc ( 112 ) are machined so that the shoulder ( 17 ) is traversed by one of the drilled holes of one of the discs and one of the drilled holes of the other of the discs opens into the corresponding notch ( 118 ).

5. Method according to claim 1 , wherein the one of the discs, whose friction surface ( 113 ) thereof has been machined, comprises a rear surface ( 114 ) opposite said friction surface, said rear surface of said one of the disks comprising housings ( 115 ) to receive studs, the first disc ( 12 ) and the second disc ( 112 ) being machined such that the notch is coaxial and of identical diameter to one of said housings and such that the shoulder is coaxial and of identical diameter to the corresponding notch.

6. Method according to claim 1 , wherein the one of the discs, whose friction surface ( 113 ) thereof has been machined, comprises a rear surface ( 114 ) opposite said friction surface, said rear surface of said one of the disks comprising housings ( 115 ) to receive studs, the first disc ( 12 ) and the second disc ( 112 ) being machined so as to comprise as many corresponding notches ( 118 ) and shoulders ( 17 ) as housings.

7. Assembled disc ( 212 ) designed to be used as a rear stator disc with studs from a stack of brake discs, said disc comprising:
a first disc ( 12 ) having been used during a first life as a rear stator disc with studs from a first stack of brake discs, the first disc comprising a first principal surface comprising at least one shoulder ( 17 ),
a second disc ( 112 ) having been used during a first life as a rear stator disc with studs from a second stack of brake discs, the second disc comprising a second principal surface which bears against the first principal surface of the first disc and which comprises at least one notch ( 118 ) in which the shoulder of the first disc is received, the notch and the shoulder cooperating so as to centre the discs,
means for fixing the two discs together.

8. A stack of brake discs comprising an assembled disc ( 212 ) used as a rear stator disc with studs in said stack of brake discs, said assembled disc comprising:
a first disc ( 12 ) having been used during a first life as a rear stator disc with studs from a first stack of brake discs, the first disc comprising a first principal surface comprising at least one shoulder ( 17 ),
a second disc ( 112 ) having been used during a first life as a rear stator disc with studs from a second stack of brake discs, the second disc comprising a second principal surface which bears against the first principal surface of the first disc and which comprises at least one notch ( 118 ) in which the shoulder of the first disc is received, the notch and the shoulder cooperating so as to centre the discs,
means for fixing the two discs together.

Assignees

• Messier Bugatti Dowty

Inventors

• Chambard Pierre
• Dorge Come

Classifications

• B64C25/44

  Actuating mechanisms · CPC title

• F16D2200/0047

  Ceramic composite, e.g. C/C composite infiltrated with Si or B, or ceramic matrix infiltrated with metal · CPC title

• B64C25/42

  Arrangement or adaptation of brakes · CPC title

• B23P6/00

  Restoring or reconditioning objects (straightening or restoring form of sheet metal, metal rods, metal tubes, metal profiles, or specific articles made therefrom B21D1/00, B21D3/00; repairing defective or damaged objects by casting techniques B22D19/10) · CPC title

• F16D55/24 Primary

  with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member · CPC title