WO2012069732A1 - Procédé de chauffage d'une zone de matériau composite à réparer - Google Patents
Procédé de chauffage d'une zone de matériau composite à réparer Download PDFInfo
- Publication number
- WO2012069732A1 WO2012069732A1 PCT/FR2011/052639 FR2011052639W WO2012069732A1 WO 2012069732 A1 WO2012069732 A1 WO 2012069732A1 FR 2011052639 W FR2011052639 W FR 2011052639W WO 2012069732 A1 WO2012069732 A1 WO 2012069732A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mats
- main
- heating
- mat
- satellite
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/0288—Applications for non specified applications
- H05B1/0294—Planar elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C73/00—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
- B29C73/24—Apparatus or accessories not otherwise provided for
- B29C73/30—Apparatus or accessories not otherwise provided for for local pressing or local heating
- B29C73/34—Apparatus or accessories not otherwise provided for for local pressing or local heating for local heating
Definitions
- the present invention relates to the field of repair of composite materials, particularly for aeronautics.
- thermocouples are connected to an electric current, which is regulated by means of one or more thermocouples arranged near the zone to be heated.
- the present invention is intended to overcome these disadvantages.
- This object of the invention is achieved with a method of heating a zone of composite material to be repaired, in which a main heating mat is placed on the zone to be repaired, as well as one or more heating mats. Satellites on the periphery of this main carpet and adjacent to the edges of this main carpet.
- thermocouple is placed under each of the main and satellite mats, and the electric power supplied to each of these mats is continuously and independently regulated so as to obtain the desired homogeneity and speed of stabilization for temperatures over the entire area covered by the main heating mat.
- the heating thermocouples of the satellite heating mats are placed close to the junction of these mats with the main heating mat, and they are assigned a set value for optimizing the temperature distribution under the heating mat. main.
- FIG. 1 is a sectional view of a heating mat of the prior art, placed on an area of composite material to be repaired,
- FIG. 2 is a view from above of the assembly of FIG. 1,
- FIG. 3 is a graph illustrating the evolution over time of the temperatures measured at several locations of the structure covered by the heating mat of FIGS. 1 and 2
- FIG. 4 is a graph showing the distribution of the temperatures on the structure relative to the center of the heating mat of FIGS. 1 and 2
- FIGS. 5 to 8 are figures respectively similar to FIGS. 1 to 4, for a method according to the invention implementing on the one hand a main heating mat and on the other hand, satellite heating mats,
- FIG. 9 shows a particular disposition of heating mats arranged around a main heating mat according to the method according to the invention.
- FIG. 10 illustrates the distribution of temperatures over a portion of the structure covered by the main heating mat of FIG. 9.
- FIGS. 1 and 2 there is shown a composite front part 1 on which a heating mat 3 is applied, for the purpose of achieving a local repair of the part 1, in accordance with the general precepts which have been explained in the preamble of the present description.
- the composite part 1 is formed of carbon fibers or other material, taken from the mass of a polymerized resin.
- the heating mat 3 typically comprises a network of electrical resistances taken in the mass of a silicone mat, this network of electrical resistances being able to be supplied by a current source by means of an electrical connection pad 5.
- An electronic control apparatus makes it possible to send on the connection pad 5 a current whose power is determined on the one hand, from a set temperature for the heating mat 3 imposed by an operator, and secondly to from actual temperature values, measured by one or more thermocouples distributed near the surface to be heated.
- thermocouples As is known per se, these effective temperature measurements by these thermocouples allow, thanks to one or more feedback loops, to adapt the power of the electric current sent to the connection pad 5 by the electronic equipment.
- the disadvantages of a heating mat as just described reside on the one hand in the fact that once the climb slope is performed and the plateau temperature reached and maintained on the control point selected, the other measuring points take a certain time to stabilize in temperature, and secondly in the fact that once this stabilization reached, there is a lack of homogeneity of temperatures on the surface of the repair.
- thermocouples TC1 to TC10 distributed as indicated in FIG. 2: the thermocouples TC1 to TC4 are located in the corner areas of the heating mat 3, and the other thermocouples TC5 to TC10 are in the more central zone of this heating mat.
- FIG. 3 illustrates on the one hand the fact that the temperatures at certain thermocouples TC1 to TC10 have a difficulty in stabilizing under the conditions of the experiment carried out, even after 60 minutes of bearing.
- FIG. 3 illustrates on the other hand the fact that once stabilized, the temperatures show a great disparity in the different zones of the heating mat 3: relatively low temperatures (between 120 and 150 ° Celsius) in the corner zones of this carpet heating (TC1 to TC4), and relatively high temperatures (between 160 to 195 degrees Celsius) in the more central area of this carpet (TC5 to TC10).
- the only zone where the temperature substantially corresponds to the desired set temperature for performing the repair of the composite material, namely 190 ° Celsius, is the central zone of the heating mat; this temperature then decreases as we get closer to the edges of this heating mat.
- the method according to the invention proposes to place one or more "satellite” heating mats at the periphery of the so-called “main” heating mat 3 in what follows .
- the satellite heating mats 7 to 9 are of the same nature as the main heating mat 3, and include, in particular, connection pads 1 1 and 13, for electrically feeding these heating mats.
- each of the satellite heating mats 7 and 9 has substantially a rectangular shape of 500 mm long and 200 mm wide.
- thermocouples TC1 3 to TC18 have satellite heating mats 7 and 9 so that these thermocouples are close to the junction areas of these satellite mats with the main mat.
- thermocouples TC1 3 to TC18 are then used on the one hand, and on the other hand one or more thermocouples TC1 to TC12 placed in a central zone of the main heating mat 3 to control the power supply of all of these thermocouples. carpet by means of the electronic equipment (not shown) on which the operator has set a temperature setpoint (typically 190 ° Celsius, as previously indicated).
- a temperature setpoint typically 190 ° Celsius, as previously indicated.
- thermocouples TC1 to TC12 distributed over the main heating mat 3 show a great homogeneity of temperatures.
- Fig 9 illustrates a particular arrangement according to the invention, in which one may have the satellite heating mats 7 and 9 on two adjacent edges of the main heating mat 3.
- conductive plates 15 and 17 can be added, providing thermal bridges between the satellite mats and the main mat, and thus facilitating a homogeneous distribution of the temperatures on the heated structure.
- FIG. 10 illustrates the temperatures measured in zone X of FIG. 9, corresponding to the lower left quarter of the surface covered by the main heating mat 3, precisely on the side where the satellite mats 7, 9 have been positioned: it can be seen a very small variation of these temperatures with respect to the set temperature of 190 ° Celsius imposed by the operator on the main heating mat 3.
- the apparatus for controlling the temperatures of the control points of the satellite mats 7 and 9 and of the main belt 3 is designed to control these temperatures independently: this apparatus permanently adjusts the power supplying the satellite mats 7 and 9, in order to achieve the maintenance of the set temperature at the selected control points for these mats.
- the method according to the invention makes it possible, with very little or even with a single temperature measurement point on the main heating mat 3, to continuously compensate for heat losses. which take place in the edge zones of this main carpet, and thus on the one hand to obtain a high speed of stabilization of the temperature of the area to be repaired under the main carpet, and on the other hand a high homogeneity of these temperatures ..
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Central Heating Systems (AREA)
- Control Of Resistance Heating (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Carpets (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2013127858/05A RU2013127858A (ru) | 2010-11-25 | 2011-11-15 | Способ нагревания подлежащего ремонту участка композитного материала |
ES11794553.5T ES2531656T3 (es) | 2010-11-25 | 2011-11-15 | Procedimiento de calentamiento de una zona de material compuesto a reparar |
EP11794553.5A EP2643151B1 (fr) | 2010-11-25 | 2011-11-15 | Procédé de chauffage d'une zone de materiau composite à réparer |
CN201180055876.0A CN103221203B (zh) | 2010-11-25 | 2011-11-15 | 用于加热待修复的合成材料区域的方法 |
BR112013011230A BR112013011230A2 (pt) | 2010-11-25 | 2011-11-15 | método para aquecer uma área de material compósito a ser reparada |
CA2816490A CA2816490A1 (fr) | 2010-11-25 | 2011-11-15 | Procede de chauffage d'une zone de materiau composite a reparer |
US13/901,181 US8871839B2 (en) | 2010-11-25 | 2013-05-23 | Method for heating a composite material area to be repaired |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1059705A FR2967937B1 (fr) | 2010-11-25 | 2010-11-25 | Procede de chauffage d'une zone de materiau composite a reparer |
FR10/59705 | 2010-11-25 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/901,181 Continuation US8871839B2 (en) | 2010-11-25 | 2013-05-23 | Method for heating a composite material area to be repaired |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012069732A1 true WO2012069732A1 (fr) | 2012-05-31 |
Family
ID=44317891
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2011/052639 WO2012069732A1 (fr) | 2010-11-25 | 2011-11-15 | Procédé de chauffage d'une zone de matériau composite à réparer |
Country Status (9)
Country | Link |
---|---|
US (1) | US8871839B2 (fr) |
EP (1) | EP2643151B1 (fr) |
CN (1) | CN103221203B (fr) |
BR (1) | BR112013011230A2 (fr) |
CA (1) | CA2816490A1 (fr) |
ES (1) | ES2531656T3 (fr) |
FR (1) | FR2967937B1 (fr) |
RU (1) | RU2013127858A (fr) |
WO (1) | WO2012069732A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9817452B2 (en) * | 2013-01-11 | 2017-11-14 | The Boeing Company | System and method for thermal management guidance |
FR3106772B1 (fr) | 2020-01-31 | 2022-01-28 | Ecole Nat Superieure D’Arts Et Metiers | Tapis chauffant souple pour le preformage ou la consolidation de pieces composites |
FR3124966B1 (fr) | 2021-07-08 | 2024-01-12 | Ecole Nat Superieure D’Arts Et Metiers | Dispositif multicouche de moule pour la fabrication de pieces composites avec ceinture de blocage thermique |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2537824A1 (fr) * | 1983-06-17 | 1984-06-15 | Michelin & Cie | Tapis chauffant souple pour reparation de pneumatiques |
DE102004062064A1 (de) * | 2004-12-23 | 2006-07-06 | Röder Präzision GmbH | Verfahren zur Herstellung und Reparatur von Faserverbund-Metallkompositanteilen |
EP1962562A1 (fr) | 2007-02-21 | 2008-08-27 | United Technologies Corporation | Réparation complète d'un treillis métallique avec une couverture chauffante |
-
2010
- 2010-11-25 FR FR1059705A patent/FR2967937B1/fr not_active Expired - Fee Related
-
2011
- 2011-11-15 RU RU2013127858/05A patent/RU2013127858A/ru not_active Application Discontinuation
- 2011-11-15 CA CA2816490A patent/CA2816490A1/fr not_active Abandoned
- 2011-11-15 BR BR112013011230A patent/BR112013011230A2/pt not_active IP Right Cessation
- 2011-11-15 CN CN201180055876.0A patent/CN103221203B/zh not_active Expired - Fee Related
- 2011-11-15 WO PCT/FR2011/052639 patent/WO2012069732A1/fr active Application Filing
- 2011-11-15 ES ES11794553.5T patent/ES2531656T3/es active Active
- 2011-11-15 EP EP11794553.5A patent/EP2643151B1/fr not_active Not-in-force
-
2013
- 2013-05-23 US US13/901,181 patent/US8871839B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2537824A1 (fr) * | 1983-06-17 | 1984-06-15 | Michelin & Cie | Tapis chauffant souple pour reparation de pneumatiques |
DE102004062064A1 (de) * | 2004-12-23 | 2006-07-06 | Röder Präzision GmbH | Verfahren zur Herstellung und Reparatur von Faserverbund-Metallkompositanteilen |
EP1962562A1 (fr) | 2007-02-21 | 2008-08-27 | United Technologies Corporation | Réparation complète d'un treillis métallique avec une couverture chauffante |
Also Published As
Publication number | Publication date |
---|---|
EP2643151A1 (fr) | 2013-10-02 |
CN103221203A (zh) | 2013-07-24 |
US8871839B2 (en) | 2014-10-28 |
CA2816490A1 (fr) | 2012-05-31 |
FR2967937A1 (fr) | 2012-06-01 |
US20130261231A1 (en) | 2013-10-03 |
FR2967937B1 (fr) | 2013-08-30 |
CN103221203B (zh) | 2015-09-09 |
RU2013127858A (ru) | 2014-12-27 |
EP2643151B1 (fr) | 2014-12-17 |
ES2531656T3 (es) | 2015-03-18 |
BR112013011230A2 (pt) | 2016-11-01 |
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