Method for repairing a structure comprising at least one zone to be heated

Patent metadata

Field	Value
Publication number	US-10563422-B2
Application number	US-201816012241-A
Country	US
Kind code	B2
Filing date	Jun 19, 2018
Priority date	Jun 20, 2017
Publication date	Feb 18, 2020
Grant date	Feb 18, 2020

Abstract

A method for repairing a structure comprising at least one zone to be heated and which comprises the steps of inflating a frame to form a framework, attaching panels removably to the frame to form an enclosure referred to as a heating enclosure, positioning the enclosure over the zone, heating the interior space of the enclosure using a heating device.

First claim

The invention claimed is:

1. A method for repairing an aircraft structure comprising at least one zone to be heated with a hot fluid and which comprises the following steps:
inflating a frame fabricated from a heat resistant material to form a framework;
attaching panels fabricated from a heat resistant material removably to the frame to form a heating enclosure;
positioning the heating enclosure over the zone of the aircraft structure;
using a heating device to heat an interior space of the heating enclosure and the zone with the hot fluid to an elevated temperature to achieve the repair of the zone of the aircraft structure.

2. The repair method as claimed in claim 1 , and which comprises a step of holding the heating enclosure in position using suction cups connected to at least one of the frame or to the panels.

3. The repair method as claimed in claim 1 , wherein the inside of the heating enclosure is heated using a hot fluid transmission system and wherein the same hot fluid transmission system is used for inflating the frame and for heating the heating enclosure.

4. The repair method as claimed in claim 3 , wherein the hot fluid transmission system comprises a hot air gun, a pump and an air pump.

5. The repair method as claimed in claim 4 , wherein the hot air gun, the pump and the air pump are combined in a single unit.

6. The repair method as claimed in claim 4 , wherein the hot air gun, the pump and the air pump are all controlled by a control unit.

7. The repair method as claimed in claim 1 , wherein temperature detection means are provided inside the heating enclosure and are connected to a heating control center outside the heating enclosure.

8. The repair method as claimed in claim 1 , wherein a temperature is detected using at least one temperature measurement sensor inside the heating enclosure and in a region of the zone of the structure.

9. The method as claimed in claim 8 , wherein a plurality of temperature measurement sensors are arranged at a plurality of different points inside the heating enclosure and a plurality of temperature measurement sensors are arranged at a plurality of points of the structure.

10. The repair method as claimed in claim 1 , further comprising a plurality of frames, wherein the frames are coupled via at least one of their lateral face or base face in order to enlarge a size of the heating enclosure.

11. The repair method as claimed in claim 2 , wherein the inside of the heating enclosure is heated using a hot fluid transmission system and wherein the same hot fluid transmission system is used for inflating the frame, for heating the heating enclosure, and for evacuating the suction cups.

12. The method according to claim 1 , wherein the heat resistant material of the panels is coated with a silicone coating.

13. The method according to claim 1 , wherein the heat resistant material of the panels comprises a material being resistant to temperatures of up to 250 degrees.

14. The method according to claim 1 , wherein the heat resistant material of the frame comprises thermoplastic polyurethane.

15. The method according to claim 1 , wherein the heat resistant material of the frame comprises a polyester fiber ceramic material.

16. The method according to claim 1 , wherein the heat resistant material of the frame is coated with a silicone coating.

17. The method according to claim 1 , wherein the heat resistant material of the panels comprises thermoplastic polyurethane.

18. The method according to claim 1 , wherein the heat resistant material of the panels comprises a polyester fiber ceramic material.

19. A method for repairing an aircraft structure comprising at least one zone to be heated with a hot fluid and which comprises the following steps:
inflating a frame to form a framework;
attaching panels removably to the frame along edges of the panels, the panels having reinforcers along the edges thereof that are removably attached to the frame, to form a heating enclosure;
positioning the heating enclosure over the zone of the aircraft structure;
using a heating device to heat an interior space of the heating enclosure and the zone with the hot fluid to an elevated temperature to achieve the repair of the zone of the aircraft structure.

20. A method for repairing an aircraft structure comprising at least one zone to be heated with a hot fluid and which comprises the following steps:
inflating a frame to form a framework;
attaching panels removably to the frame to form a heating enclosure;
attaching a lower panel to the frame, which lower panel includes an opening therein,
positioning the heating enclosure over the zone of the aircraft structure such that the opening is positioned over the zone so as to provide a thermal communication between an interior of the enclosure and the zone;
using a heating device to heat an interior space of the heating enclosure and the zone with the hot fluid to an elevated temperature to achieve the repair of the zone of the aircraft structure.

Assignees

• Airbus Sas
• Airbus Operations Sas

Inventors

• Marty Jean-Claude
• Charles Julien
• Lebahar Olivier
• Dobigeon Franck
• Ferrer Guillaume
• Borja Thierry
• Hanser Sebastien

Classifications

• B29C73/34 Primary

  for local heating · CPC title

• B05D3/0254

  After-treatment · CPC title

• E04H2015/201

  with inflatable tubular framework, with or without tent cover · CPC title

• B29C73/02

  using liquid or paste-like material (B29C73/16 takes precedence) · CPC title

• B05D5/005

  Repairing damaged coatings · CPC title