Method for repairing honeycomb core sandwich structural body and repaired product

Patent metadata

Field	Value
Publication number	US-9815546-B2
Application number	US-201414221595-A
Country	US
Kind code	B2
Filing date	Mar 21, 2014
Priority date	Mar 28, 2013
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

A method for repairing a honeycomb core sandwich structural body according to the present invention is a method in which a damaged portion that is formed in a honeycomb core sandwich structural body where a honeycomb structured core is held between a first outer skin and a second outer skin and that reaches the core through the first outer skin is repaired, the method including: a repair material mounting step of mounting a repair material on the damaged portion, the repair material including a patch that covers an opening of the damaged portion, and one or a plurality of braces that support the patch; a patch bonding step of bonding the patch to the first outer skin; and a brace bonding step of bonding the brace to the second outer skin or the core.

First claim

What is claimed is:

1. A method for repairing a honeycomb core sandwich structural body, in which a damaged portion that is formed in a honeycomb core sandwich structural body where a honeycomb structured core is held between a first outer skin and a second outer skin and that reaches the core through the first outer skin is repaired, the method comprising:
joining one or a plurality of braces to a patch to form a repair material wherein the one or the plurality of braces directly support the patch, have a pipe shape and include an axially-continuous path;
a repair material mounting step of mounting the repair material on the damaged portion, wherein the patch covers an opening of the damaged portion;
a patch bonding step of bonding the patch to the first outer skin; and
a brace bonding step of bonding the brace to the second outer skin or the core wherein an adhesive for bonding the brace to the second outer skin or the core is injected from a distal end side of the axially-continuous path.

2. The method according to claim 1 ,
wherein a thermosetting adhesive is used in both the patch bonding step and the brace bonding step, and
the patch bonding step and the brace bonding step are performed at the same time by transferring heat emitted from a heat source used for bonding the patch to the first outer skin to the second outer skin side through the brace.

3. The method according to claim 1 ,
wherein a thermoplastic adhesive is used in both the patch bonding step and the brace bonding step, and
the patch bonding step and the brace bonding step are performed at the same time by transferring heat emitted from a heat source used for bonding the patch to the first outer skin to the second outer skin side through the brace.

4. The method according to claim 1 ,
wherein
at least two of the plurality of braces intersect each other.

5. The method according to claim 1 , wherein an end of each of the braces directly contacts the patch.

6. The method according to claim 1 , wherein the patch is made of fiber reinforced resin.

7. The method according to claim 1 , wherein the patch is a pre-cured patch.

8. The method according to claim 1 , wherein the patch is made of metal.

9. The method according to claim 1 , wherein the brace is made of aluminum alloy.

10. The method according to claim 1 , wherein in the brace bonding step, the brace is bonded to the second outer skin.

11. A method for repairing a honeycomb core sandwich structural body, in which a damaged portion that is formed in a honeycomb core sandwich structural body where a honeycomb structured core is held between a first outer skin and a second outer skin and that reaches the core through the first outer skin is repaired, the method comprising:
a repair material mounting step of mounting a repair material on the damaged portion, the repair material including a patch that covers an opening of the damaged portion, and one or a plurality of braces that support the patch;
a patch bonding step of bonding the patch to the first outer skin; and
a brace bonding step of bonding the brace to the second outer skin or the core,
wherein the brace has a pipe shape, and includes an axially-continuous path,
a through hole is formed in the patch so as to open the path, and
an adhesive for bonding the brace to the second outer skin or the core is injected into the path from the through hole.

12. The method according to claim 11 ,
wherein the path is gradually widened on a distal end side where the brace is bonded to the second outer skin or the core.

13. A method for repairing a honeycomb core sandwich structural body, in which a damaged portion that is formed in a honeycomb core sandwich structural body where a honeycomb structured core is held between a first outer skin and a second outer skin and that reaches the core through the first outer skin is repaired, the method comprising:
a repair material mounting step of mounting a repair material on the damaged portion, the repair material including a patch that covers an opening of the damaged portion, and one or a plurality of braces that directly support the patch;
a patch bonding step of bonding the patch to the first outer skin; and
a brace bonding step of bonding the brace to the second outer skin or the core, wherein the one or the plurality of braces are pipe-shaped and include an axially-continuous path and wherein an adhesive for bonding the brace to the second outer skin or the core is injected from a distal end side of the axially-continuous path.

Assignees

• Mitsubishi Aircraft Corp

Inventors

• Mizuno Kotoyo
• Shigetomi Toshikazu
• Tanaka Hideaki
• Ishida Morimasa
• Muto Shuhei

Classifications

• B32B2037/1253

  curable adhesive · CPC title

• B64C1/12 Primary

  Construction or attachment of skin panels · CPC title

• B32B3/12

  characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure · CPC title

• B29L2031/608

  Honeycomb structures · CPC title

• B29C73/06

  using plugs sealing in the hole · CPC title