EP3090257A1 - Device and assembly for non-destructive testing of a composite part and method for non-destructive testing of a composite part by transmission ultrasound - Google Patents

Device and assembly for non-destructive testing of a composite part and method for non-destructive testing of a composite part by transmission ultrasound

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Publication number
EP3090257A1
EP3090257A1 EP14830985.9A EP14830985A EP3090257A1 EP 3090257 A1 EP3090257 A1 EP 3090257A1 EP 14830985 A EP14830985 A EP 14830985A EP 3090257 A1 EP3090257 A1 EP 3090257A1
Authority
EP
European Patent Office
Prior art keywords
magnetic bodies
magnetic
bodies
probe
destructive testing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14830985.9A
Other languages
German (de)
French (fr)
Inventor
André BAILLARD
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Safran Nacelles SAS
Original Assignee
Aircelle SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aircelle SA filed Critical Aircelle SA
Publication of EP3090257A1 publication Critical patent/EP3090257A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/223—Supports, positioning or alignment in fixed situation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G01N29/043—Analysing solids in the interior, e.g. by shear waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/225—Supports, positioning or alignment in moving situation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
    • G01N29/265—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the sensor relative to a stationary material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/28—Details, e.g. general constructional or apparatus details providing acoustic coupling, e.g. water
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/023—Solids
    • G01N2291/0231—Composite or layered materials
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/048—Transmission, i.e. analysed material between transmitter and receiver

Definitions

  • the present invention relates to the field of non-destructive testing of parts made of composite materials, and to a method for the non-destructive testing of a composite part by means of ultrasonic transmission. relates to a device for non-destructive testing of a composite part, to an assembly comprising said device and said part, and to a method of non-destructive testing of a composite part by ultrasound in transmission.
  • a method of manufacturing or repairing a composite material part generally comprises a step to control whether said part conforms to a previously defined specification. It is typically necessary to verify that the manufactured or repaired part has no defect, in particular gluing or delamination.
  • This control method is usually performed by means of a non-destructive control device.
  • the transmission ultrasound transmission control method consisting of sending ultrasonic waves into the fabricated or repaired part, and then analyzing the signal when the waves passed through that room.
  • Such a method may be implemented by a transmission ultrasound control device, typically comprising an emitting ultrasonic transducer and an ultrasonic receiving transducer.
  • Part control can be performed either manually by an operator who moves the transmitter and receiver transducers over the surface of the part to be controlled, or automatically via robotic arms connecting each transducer to scan the surface of the part.
  • Such an automated device is very advantageous compared to the manual control in that it ensures a constant relative positioning between the transducers.
  • Figure 1 illustrates a probe 1.
  • the probe 1 comprises a housing 3 enclosing an ultrasonic transducer 5, transmitter or receiver, positioned next to magnets 7, 9.
  • the probes are disposed on either side of the part to be controlled, so that the conductive probe, connected for example to a robotic arm, controls the displacement of the follower probe by virtue of the presence of the magnets.
  • each probe needs several magnetic bodies arranged around the transducer, which leads to particularly bulky probes and poorly adapted to the control of parts with a curved profile.
  • test piece when the test piece is a repaired part, it is common that the test piece includes other inserts, can not be removed during the control, limiting the accessibility of probes to the test piece.
  • the magnetic coupling is here accomplished by means of a single toroidal magnetic body 11 by probe 1, the transducer 5 being positioned inside the toric magnetic body.
  • the contact surface between one of the probes and the test piece has a diameter at least equal to that of the torus of the magnetized body.
  • the control device is particularly bulky, and therefore poorly suited to the control of curved parts.
  • the present invention aims to solve the disadvantages of the prior art and the inventions mentioned above, and relates for this purpose to a device for the non-destructive testing of a composite part, remarkable in that it comprises:
  • At least two magnetic bodies at least one of said at least two magnetic bodies being adapted to exert a force of attraction to allow a mutual maintenance, or one by the other, of the magnetic bodies of parts and other of said part, said magnetic bodies being intended to be positioned directly on at least one wall of the part to be controlled,
  • At least one of said magnetic bodies comprises a retaining ring shaped to support at least one of said probes;
  • At least one magnetic body is of substantially cylindrical shape, which makes it possible to ensure a distribution of the magnetic field along the longitudinal axis of the magnetic body, and thus to move the probes simultaneously;
  • at least one magnetic body is made of hard magnetic material such as an alloy of neodymium, iron and boron, this alloy having good magnetic properties;
  • the emitting ultrasound probe further comprises at least one emitting ultrasound transducer and the receiving ultrasound probe further comprises at least one receiving ultrasonic transducer.
  • the present invention also relates to an assembly comprising a composite part to be inspected and at least one device for non-destructive testing of said part, said device comprising at least two magnetic bodies and at least one emitting ultrasound probe and at least one receiving ultrasonic probe , said assembly being remarkable in that the magnetic bodies are positioned on either side of the part to be controlled, directly on a wall of said part, at least one of said at least two magnetic bodies exerting a force of attraction adapted to allow a mutual maintenance, or one by the other, of the magnetic bodies on either side of said part, and in that said emitting and receiving ultrasonic probes are respectively positioned on one and the other of said magnetic bodies.
  • the invention relates to a method of non-destructive testing of a composite ultrasound transmission part, remarkable in that it further comprises the following steps to:
  • At least two magnetic bodies on either side of the workpiece, so that at least one of said at least two magnetic bodies exerts a force of attraction to allow mutual maintenance, or one by the other, magnetic bodies on either side of said part, said magnetic bodies being positioned directly on a wall of the part to be checked,
  • the method according to the invention further comprises a step for moistening the part to be controlled, for example by vaporization.
  • said at least two magnetic bodies are positioned substantially vis-à-vis each other.
  • FIGS. 1 and 2 illustrate exemplary embodiments of probes for non-destructive testing device of a composite part according to the prior art
  • FIG. 3 shows a device for non-destructive testing of a composite part according to the invention, mounted on a composite part that it is desired to control.
  • FIG. 3 illustrating an assembly 20 comprising a composite part 21 to be inspected and a device 23 according to the invention for non-destructive testing of the composite part 21.
  • the composite part to be inspected may be, by way of non-limiting illustrative example, a composite structure called "sandwich”, comprising a first skin called “inner skin” and a second skin called “outer skin”, separated by a nest structure. of bees frequently called "NIDA”.
  • This type of composite structure finds particular application in the aeronautical field, and frequently equips certain sections of nacelles for aircraft turbojet engine. This type of composite structure makes it possible to absorb at least partially the acoustic waves generated by the nacelle.
  • the device 23 for non-destructive testing of a composite part 21 comprises a first magnetic body 25 and a second magnetic body 27 disposed on either side of the part 21, positioned directly on the walls 29, 31 of the part 21 to be controlled.
  • the wall 26 of the magnetic body 25 is in contact with the wall 29 of the part 21 to be inspected, and the wall 28 of the magnetic body 27 is in contact with the wall 31 of the part 21.
  • magnetic body is meant any body adapted to exert a magnetic force or to react to an external magnetic field.
  • the magnetic body may be for example a ferromagnetic body not itself generating a magnetic field, but being capable of reacting to an external magnetic field.
  • the magnetic bodies 25, 27 of the device according to the invention are preferably made of hard magnetic material such as an alloy of neodymium, iron and boron (NdFeB).
  • the two magnetic bodies 25, 27 exert a force of attraction one on the other allowing a mutual maintenance, or one by the other, magnetic bodies on both sides of the room 21.
  • the magnetic bodies 25, 27 are preferably of substantially cylindrical shape, which makes it possible to ensure a distribution of the magnetic field essentially along the longitudinal axis of the magnetic body, but here again it can be envisaged a magnetic body. having a different geometric shape, such as parallelepiped for example.
  • the dimensions of the magnetic bodies are further adapted to the part to be controlled, that is to say that the magnetic bodies have dimensions shaped so that the magnetic bodies attract each other on both sides of the piece.
  • the thickness of the magnetic bodies varies according to the thickness of the part to be controlled, the contact surface between the magnetic bodies and the part to be controlled advantageously remaining unchanged regardless of the thickness of said part.
  • the control device 23 further comprises transmitting and receiving ultrasonic probes 33, the emitter probe 33 being supported by the magnetic body 25 via a retaining ring 37 integral with the magnetic body 25, and the receiving probe 35. being supported by the magnetic body 27 by means of a retaining ring 39 integral with the magnetic body 27.
  • the retaining rings can be attached to the magnetic bodies by any fixing means known to those skilled in the art, and can also be magnetic material so that the magnetic bodies 25, 27 and / or the retaining rings attract.
  • the emitter and receiver probes are directly supported by the magnetized bodies, and are positioned directly on the walls opposite the walls 26 and 28 of the magnetic bodies 25,27.
  • the transmitting and receiving ultrasound probes 33 further comprise, respectively, an emitter ultrasound transducer and an ultrasonic receiver transducer, not shown in the figures.
  • the ultrasonic transducers used are well known to those skilled in the art and will not be further described in the present description.
  • probes 33, 35 are intended to be connected to a device for acquiring and processing data, not shown.
  • At least one of the two probes can be controlled by an automated control arm, which allows the displacement of the two magnetically coupled probes.
  • control method according to the invention is carried out by the following steps.
  • the two magnetic bodies 25, 27 are positioned directly and respectively on the walls 29, 31 of the part 21 to be inspected, said bodies being for example positioned substantially opposite one another to ensure good wave transmission from the transmitting probe to the receiving probe.
  • the magnetic bodies 25, 27 exert a force of attraction allowing a mutual maintenance, or of one by the other, on both sides of the part 21.
  • the emitting ultrasonic probe 33 is then positioned on the magnetic body 25, the holding of which is for example ensured by means of the retaining ring 37, and then positioning on the magnetic body 27 the receiving ultrasonic probe 35, for example maintained by means of the retaining ring 39.
  • the method of non-destructive ultrasonic transmission control according to the invention may further comprise a step for arranging a coupling gel between the ultrasonic probe and the magnetic body that supports it. This advantageously makes it possible to ensure good propagation of the ultrasonic waves in the part 21 to be checked. It can also be considered, alternatively or in addition, moisten the part to be controlled, for example by spraying.
  • the ultrasonic waves propagate successively from the transducer emitting the probe 33 to the magnetic body 25, pass through the magnetic body 25, then through the workpiece 21 to be controlled, and then through the magnetic body 27 before being picked up by the receiving transducer. the receiving probe 35.
  • the device according to the invention is particularly advantageous when it is desired to control a composite part having a curved profile, such as a sandwich acoustic panel for example.
  • the present invention by providing to arrange the magnetic bodies directly on the walls of the part to be controlled, on either side of the part to be controlled, and by providing a transmitting probe and a receiving probe each supported by a magnetic body, only the magnetic bodies are in contact with the walls of the part to be controlled, which makes it possible to reduce substantially the space requirement with respect to the devices known from the prior art.
  • the size of the magnetic bodies is optimized, which makes it possible to benefit from a good space / weight / magnetic performance ratio.
  • the magnetic coupling of the magnetized bodies directly supported by the part to be controlled also allows a good alignment of the ultrasonic probes, and consequently an optimal propagation of said waves.
  • the invention is not limited to the embodiments of the control device, described above only as illustrative examples, but it encompasses all the variants involving the technical equivalents of the means. described and their combinations if they fall within the scope of the invention.
  • the description refers to an acoustic composite part equipping including a nacelle for aircraft turbojet engine. It goes without saying that the control device and the method claimed below are in no way limited to the control of this type of room, but concern the control of any composite room, acoustic or not.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Acoustics & Sound (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

The invention relates to a device (23) for non-destructive testing of a composite part (21), which is characterised by comprising: at least two magnetic bodies (25, 27), at least one of said at least two magnetic bodies being adapted such as to exercise a force of attraction such as to allow mutual restraint, or restraint of one by the other, of the magnetic bodies on either side of said part, said magnetic bodies being intended to be positioned directly on at least one wall (29, 31) of the part to be tested; and at least one transmitting ultrasound probe (33) positioned on one of said magnetic bodies, and at least one receiving ultrasound probe (35) positioned on the other one of said magnetic bodies.

Description

Dispositif et ensemble pour le contrôle non-destructif d'une pièce composite, et procédé de contrôle non-destructif d'une pièce composite par ultrasons en transmission La présente invention concerne le domaine du contrôle non- destructif de pièces en matériaux composites, et se rapporte à un dispositif pour le contrôle non-destructif d'une pièce composite, à un ensemble comprenant ledit dispositif et ladite pièce, ainsi qu'à un procédé de contrôle non-destructif d'une pièce composite par ultrasons en transmission.  The present invention relates to the field of non-destructive testing of parts made of composite materials, and to a method for the non-destructive testing of a composite part by means of ultrasonic transmission. relates to a device for non-destructive testing of a composite part, to an assembly comprising said device and said part, and to a method of non-destructive testing of a composite part by ultrasound in transmission.
Un procédé de fabrication ou de réparation d'une pièce en matériau composite comprend généralement une étape visant à contrôler si ladite pièce est conforme à un cahier des charges préalablement défini. Il convient typiquement de vérifier que la pièce fabriquée ou réparée ne présente aucun défaut, notamment de collage ou de délaminage.  A method of manufacturing or repairing a composite material part generally comprises a step to control whether said part conforms to a previously defined specification. It is typically necessary to verify that the manufactured or repaired part has no defect, in particular gluing or delamination.
Ce procédé de contrôle est habituellement réalisé au moyen d'un dispositif de contrôle non-destructif.  This control method is usually performed by means of a non-destructive control device.
Parmi les procédés de contrôle non-destructif, on connaît de l'état de la technique le procédé de contrôle par émission d'ultrasons en transmission, consistant à envoyer des ondes ultrasonores dans la pièce fabriquée ou réparée, puis à analyser le signal lorsque les ondes ont traversé ladite pièce.  Among the non-destructive testing methods, it is known from the state of the art the transmission ultrasound transmission control method, consisting of sending ultrasonic waves into the fabricated or repaired part, and then analyzing the signal when the waves passed through that room.
Un tel procédé peut être mis en œuvre par un dispositif de contrôle ultrasons en transmission, comprenant classiquement un transducteur ultrasonore émetteur et un transducteur ultrasonore récepteur.  Such a method may be implemented by a transmission ultrasound control device, typically comprising an emitting ultrasonic transducer and an ultrasonic receiving transducer.
Le contrôle de la pièce peut être réalisé soit manuellement par un opérateur qui déplace les transducteurs émetteur et récepteur sur la surface de la pièce à contrôler, soit automatiquement par l'intermédiaire de bras robotisés reliant chaque transducteur afin de balayer la surface de la pièce.  Part control can be performed either manually by an operator who moves the transmitter and receiver transducers over the surface of the part to be controlled, or automatically via robotic arms connecting each transducer to scan the surface of the part.
Un tel dispositif automatisé est très avantageux par rapport au contrôle manuel en ce qu'il assure un positionnement relatif constant entre les transducteurs.  Such an automated device is very advantageous compared to the manual control in that it ensures a constant relative positioning between the transducers.
Toutefois, la présence des bras supportant et déplaçant les transducteurs limite voire rend impossible l'accessibilité à certaines zones de la pièce à contrôler lorsque la pièce à contrôler présente un profil courbe. En outre, la fabrication des bras automatisés est onéreuse. On connaît de l'art antérieur la demande de brevet européen publiée sous le numéro EP 1 500 929, qui tente de résoudre ces inconvénients en prévoyant un dispositif de contrôle par ultrasons présentant un couplage magnétique entre les sondes émettrice et réceptrice. However, the presence of arms supporting and moving the transducers limits or even makes it impossible to access certain areas of the test piece when the test piece has a curved profile. In addition, the manufacture of automated arms is expensive. Prior art is known from the European patent application published under the number EP 1 500 929, which attempts to overcome these disadvantages by providing an ultrasound control device having a magnetic coupling between the emitter and receiver probes.
La figure 1 illustre une sonde 1 . La sonde 1 comprend un carter 3 renfermant un transducteur ultrasonore 5, émetteur ou récepteur, positionné à côté d'aimants 7, 9.  Figure 1 illustrates a probe 1. The probe 1 comprises a housing 3 enclosing an ultrasonic transducer 5, transmitter or receiver, positioned next to magnets 7, 9.
Les sondes sont disposées de part et d'autre de la pièce à contrôler, de sorte que la sonde conductrice, reliée par exemple à un bras robotisé, pilote le déplacement de la sonde suiveuse grâce à la présence des aimants.  The probes are disposed on either side of the part to be controlled, so that the conductive probe, connected for example to a robotic arm, controls the displacement of the follower probe by virtue of the presence of the magnets.
Cela permet de s'affranchir de la présence d'un deuxième bras robotisé relié à la sonde suiveuse, ce qui permet de réduire les coûts de fabrication du dispositif de contrôle.  This eliminates the presence of a second robotic arm connected to the follower probe, which reduces the manufacturing costs of the control device.
Toutefois, afin de permettre un bon positionnement des sondes entre elles, chaque sonde a besoin de plusieurs corps magnétiques disposés autour du transducteur, ce qui conduit à des sondes particulièrement encombrantes et peu adaptées au contrôle de pièces au profil courbe.  However, in order to allow proper positioning of the probes with each other, each probe needs several magnetic bodies arranged around the transducer, which leads to particularly bulky probes and poorly adapted to the control of parts with a curved profile.
En outre, lorsque la pièce à contrôler est une pièce réparée, il est fréquent que la pièce à contrôler comprenne d'autres pièces rapportées, ne pouvant être ôtées le temps du contrôle, limitant alors l'accessibilité des sondes à la pièce à contrôler.  In addition, when the test piece is a repaired part, it is common that the test piece includes other inserts, can not be removed during the control, limiting the accessibility of probes to the test piece.
On connaît également de l'art antérieur la demande de brevet US 2006/0053892, qui décrit également un dispositif de contrôle par ultrasons dont les sondes émettrice et réceptrice sont couplées magnétiquement de façon à disposer d'une sonde conductrice et d'une sonde suiveuse.  The prior art is also known from patent application US 2006/0053892, which also describes an ultrasonic testing device whose emitter and receiver probes are magnetically coupled so as to have a conductive probe and a follower probe. .
Comme représenté sur la figure 2, le couplage magnétique est ici accompli par l'intermédiaire d'un seul corps magnétique torique 1 1 par sonde 1 , le transducteur 5 étant positionné à l'intérieur du corps magnétique torique.  As shown in FIG. 2, the magnetic coupling is here accomplished by means of a single toroidal magnetic body 11 by probe 1, the transducer 5 being positioned inside the toric magnetic body.
Afin de limiter l'impact que la forme torique du corps magnétique engendre sur la puissance magnétique développée, il est nécessaire de prévoir un tore présentant un diamètre important afin de fournir une puissance magnétique suffisante pour attirer l'aimant situé de l'autre côté de la pièce à contrôler.  In order to limit the impact that the toroidal shape of the magnetic body generates on the developed magnetic power, it is necessary to provide a torus having a large diameter in order to provide sufficient magnetic power to attract the magnet located on the other side of the magnet. the piece to control.
Ainsi, dans ce dispositif de l'art antérieur, la surface de contact entre l'une des sondes et la pièce à contrôler présente un diamètre au moins égal à celui du tore du corps aimanté. Le dispositif de contrôle est particulièrement encombrant, et par conséquent peu adapté au contrôle de pièces courbes. Thus, in this device of the prior art, the contact surface between one of the probes and the test piece has a diameter at least equal to that of the torus of the magnetized body. The control device is particularly bulky, and therefore poorly suited to the control of curved parts.
La présente invention vise à résoudre les inconvénients de l'art antérieur et des inventions précitées, et se rapporte à cet effet à un dispositif pour le contrôle non-destructif d'une pièce composite, remarquable en ce qu'il comprend :  The present invention aims to solve the disadvantages of the prior art and the inventions mentioned above, and relates for this purpose to a device for the non-destructive testing of a composite part, remarkable in that it comprises:
- au moins deux corps magnétiques, au moins l'un desdits au moins deux corps magnétiques étant adapté pour exercer une force d'attraction pour permettre un maintien mutuel, ou de l'un par l'autre, des corps magnétiques de part et d'autre de ladite pièce, lesdits corps magnétiques étant destinés à être positionnés directement sur au moins une paroi de la pièce à contrôler,  at least two magnetic bodies, at least one of said at least two magnetic bodies being adapted to exert a force of attraction to allow a mutual maintenance, or one by the other, of the magnetic bodies of parts and other of said part, said magnetic bodies being intended to be positioned directly on at least one wall of the part to be controlled,
- au moins une sonde ultrasonore émettrice positionnée sur l'un desdits corps magnétiques, et au moins une sonde ultrasonore réceptrice positionnée sur l'autre desdits corps magnétiques.  at least one emitting ultrasound probe positioned on one of said magnetic bodies, and at least one receiving ultrasonic probe positioned on the other of said magnetic bodies.
Ainsi, en prévoyant de disposer les corps magnétiques directement sur les parois de la pièce à contrôler, de part et d'autre de la pièce à contrôler, et en prévoyant une sonde émettrice et une sonde réceptrice chacune positionnée sur un corps magnétique, seul les corps magnétiques sont au contact des parois de la pièce à contrôler. Ainsi, la surface de contact entre le dispositif de contrôler et la pièce à contrôler est considérablement réduite par rapport à l'art antérieur, ce qui permet de limiter l'encombrement du dispositif de contrôle au niveau de la surface de contact de la pièce à contrôler, et en conséquence d'améliorer considérablement par rapport à l'art antérieur l'accessibilité à certaines zones de la pièce à contrôler.  Thus, by providing for placing the magnetic bodies directly on the walls of the part to be controlled, on either side of the part to be controlled, and by providing a transmitting probe and a receiving probe each positioned on a magnetic body, only the Magnetic bodies are in contact with the walls of the room to be controlled. Thus, the contact surface between the control device and the test piece is considerably reduced compared to the prior art, which makes it possible to limit the size of the control device at the contact surface of the test piece. control, and consequently significantly improve compared to the prior art accessibility to certain areas of the test room.
Selon des caractéristiques toutes optionnelles du dispositif selon l'invention :  According to all the optional features of the device according to the invention:
- au moins un desdits corps magnétiques comprend une bague de maintien conformée pour supporter au moins une desdites sondes ;  at least one of said magnetic bodies comprises a retaining ring shaped to support at least one of said probes;
- au moins un corps magnétique est de forme sensiblement cylindrique, ce qui permet d'assurer une répartition du champ magnétique le long de l'axe longitudinal du corps magnétique, et ainsi de déplacer les sondes de façon simultanée ; - au moins un corps magnétique est réalisé en matériau magnétique dur tel qu'un alliage de néodyme, de fer et de bore, cet alliage offrant de bonnes propriétés magnétiques ; at least one magnetic body is of substantially cylindrical shape, which makes it possible to ensure a distribution of the magnetic field along the longitudinal axis of the magnetic body, and thus to move the probes simultaneously; at least one magnetic body is made of hard magnetic material such as an alloy of neodymium, iron and boron, this alloy having good magnetic properties;
- la sonde ultrasonore émettrice comprend en outre au moins un transducteur ultrasonore émetteur et la sonde ultrasonore réceptrice comprend en outre au moins un transducteur ultrasonore récepteur.  the emitting ultrasound probe further comprises at least one emitting ultrasound transducer and the receiving ultrasound probe further comprises at least one receiving ultrasonic transducer.
La présente invention concerne également un ensemble comprenant une pièce composite à contrôler et au moins un dispositif pour le contrôle non-destructif de ladite pièce, ledit dispositif comprenant au moins deux corps magnétiques et au moins une sonde ultrasonore émettrice et au moins une sonde ultrasonore réceptrice, ledit ensemble étant remarquable en ce que les corps magnétiques sont positionnés de part et d'autre de la pièce à contrôler, directement sur une paroi de ladite pièce, au moins l'un desdits au moins deux corps magnétiques exerçant une force d'attraction adaptée pour permettre un maintien mutuel, ou de l'un par l'autre, des corps magnétiques de part et d'autre de ladite pièce, et en ce que lesdites sondes ultrasonores émettrice et réceptrice sont respectivement positionnées sur l'un et l'autre desdits corps magnétiques.  The present invention also relates to an assembly comprising a composite part to be inspected and at least one device for non-destructive testing of said part, said device comprising at least two magnetic bodies and at least one emitting ultrasound probe and at least one receiving ultrasonic probe , said assembly being remarkable in that the magnetic bodies are positioned on either side of the part to be controlled, directly on a wall of said part, at least one of said at least two magnetic bodies exerting a force of attraction adapted to allow a mutual maintenance, or one by the other, of the magnetic bodies on either side of said part, and in that said emitting and receiving ultrasonic probes are respectively positioned on one and the other of said magnetic bodies.
L'invention se rapporte enfin à un procédé de contrôle non- destructif d'une pièce composite par ultrasons en transmission, remarquable en ce qu'il comprend en outre les étapes suivantes visant à :  Finally, the invention relates to a method of non-destructive testing of a composite ultrasound transmission part, remarkable in that it further comprises the following steps to:
- positionner de part et d'autre de la pièce à contrôler au moins deux corps magnétiques, de façon à ce qu'au moins l'un desdits au moins deux corps magnétiques exerce une force d'attraction pour permettre un maintien mutuel, ou de l'un par l'autre, des corps magnétiques de part et d'autre de ladite pièce, lesdits corps magnétiques étant positionnés directement sur une paroi de la pièce à contrôler,  positioning at least two magnetic bodies on either side of the workpiece, so that at least one of said at least two magnetic bodies exerts a force of attraction to allow mutual maintenance, or one by the other, magnetic bodies on either side of said part, said magnetic bodies being positioned directly on a wall of the part to be checked,
- positionner au moins une sonde ultrasonore émettrice sur l'un des corps magnétiques, et au moins une sonde ultrasonore réceptrice sur l'autre des corps magnétiques.  positioning at least one emitting ultrasound probe on one of the magnetic bodies, and at least one receiving ultrasonic probe on the other of the magnetic bodies.
Le procédé selon l'invention comprend en outre une étape visant à humidifier la pièce à contrôler, par exemple par vaporisation.  The method according to the invention further comprises a step for moistening the part to be controlled, for example by vaporization.
En outre, optionnellement, on positionne lesdits au moins deux corps magnétiques sensiblement en vis-à-vis l'un de l'autre. D'autres caractéristiques, buts et avantages de la présente invention apparaîtront à la lecture de la description qui va suivre et à l'examen des figures ci-annexées, dans lesquelles : In addition, optionally, said at least two magnetic bodies are positioned substantially vis-à-vis each other. Other features, objects and advantages of the present invention will appear on reading the following description and on examining the appended figures, in which:
- les figures 1 et 2 illustrent des exemples de réalisation de sondes pour dispositif de contrôle non-destructif d'une pièce composite selon l'art antérieur ;  FIGS. 1 and 2 illustrate exemplary embodiments of probes for non-destructive testing device of a composite part according to the prior art;
- la figure 3 représente un dispositif pour le contrôle non- destructif d'une pièce composite selon l'invention, monté sur une pièce composite que l'on souhaite contrôler.  - Figure 3 shows a device for non-destructive testing of a composite part according to the invention, mounted on a composite part that it is desired to control.
Sur l'ensemble des figures, des références identiques ou analogues désignent des organes ou ensembles d'organes identiques ou analogues. Throughout the figures, identical or similar references designate the same or similar organs or sets of members.
On se réfère à la figure 3, illustrant un ensemble 20 comprenant une pièce composite 21 à contrôler et un dispositif 23 selon l'invention pour le contrôle non-destructif de la pièce composite 21 .  Referring to FIG. 3, illustrating an assembly 20 comprising a composite part 21 to be inspected and a device 23 according to the invention for non-destructive testing of the composite part 21.
La pièce composite à contrôler peut être, à titre d'exemple illustratif non limitatif, une structure composite dite « sandwich », comprenant une première peau dite « peau interne » et une deuxième peau dite « peau externe », séparées par une structure en nids d'abeilles fréquemment appelée « NIDA ».  The composite part to be inspected may be, by way of non-limiting illustrative example, a composite structure called "sandwich", comprising a first skin called "inner skin" and a second skin called "outer skin", separated by a nest structure. of bees frequently called "NIDA".
Ce type de structure composite trouve notamment une application dans le domaine aéronautique, et équipe fréquemment certaines sections des nacelles pour turboréacteur d'aéronef. Ce type de structure composite permet d'absorber au moins partiellement les ondes acoustiques générées par la nacelle.  This type of composite structure finds particular application in the aeronautical field, and frequently equips certain sections of nacelles for aircraft turbojet engine. This type of composite structure makes it possible to absorb at least partially the acoustic waves generated by the nacelle.
Après la fabrication ou la réparation d'une telle structure composite, il est fréquemment procédé à un contrôle non-destructif, afin de vérifier que ladite pièce est conforme à un cahier des charges prédéterminé.  After the manufacture or repair of such a composite structure, it is frequently carried out a non-destructive test, to verify that said part conforms to a predetermined specification.
Pour cela, selon l'invention, le dispositif 23 pour le contrôle non destructif d'une pièce composite 21 comprend un premier corps magnétique 25 et un deuxième corps magnétique 27 disposés de part et d'autre de la pièce 21 , positionnés directement sur les parois 29, 31 de la pièce 21 à contrôler.  For this, according to the invention, the device 23 for non-destructive testing of a composite part 21 comprises a first magnetic body 25 and a second magnetic body 27 disposed on either side of the part 21, positioned directly on the walls 29, 31 of the part 21 to be controlled.
Selon l'invention, la paroi 26 du corps magnétique 25 est au contact de la paroi 29 de la pièce 21 à contrôler, et la paroi 28 du corps magnétique 27 est au contact de la paroi 31 de la pièce 21 . On entend par corps magnétique tout corps adapté pour exercer une force magnétique ou pour réagir à un champ magnétique extérieur. Dans ce deuxième cas, le corps magnétique peut être par exemple un corps ferromagnétique ne générant pas lui-même de champ magnétique, mais étant susceptible de réagir à un champ magnétique externe. According to the invention, the wall 26 of the magnetic body 25 is in contact with the wall 29 of the part 21 to be inspected, and the wall 28 of the magnetic body 27 is in contact with the wall 31 of the part 21. By magnetic body is meant any body adapted to exert a magnetic force or to react to an external magnetic field. In this second case, the magnetic body may be for example a ferromagnetic body not itself generating a magnetic field, but being capable of reacting to an external magnetic field.
Les corps magnétiques 25, 27 du dispositif selon l'invention sont de préférence réalisés en matériau magnétique dur tel qu'un alliage de néodyme, de fer et de bore (NdFeB). Dans ce cas, les deux corps magnétiques 25, 27 exercent une force d'attraction l'un sur l'autre permettant un maintien mutuel, ou de l'un par l'autre, des corps magnétiques de part et d'autre de la pièce 21 .  The magnetic bodies 25, 27 of the device according to the invention are preferably made of hard magnetic material such as an alloy of neodymium, iron and boron (NdFeB). In this case, the two magnetic bodies 25, 27 exert a force of attraction one on the other allowing a mutual maintenance, or one by the other, magnetic bodies on both sides of the room 21.
Bien sûr, il va de soi que tout autre alliage conférant des propriétés magnétiques suffisantes pour permettre aux corps magnétiques de s'attirer lorsqu'ils sont positionnés de part et d'autre de la pièce à contrôler peut être envisagé.  Of course, it goes without saying that any other alloy conferring magnetic properties sufficient to allow the magnetic bodies to attract when they are positioned on either side of the part to be controlled may be considered.
Les corps magnétiques 25, 27 sont de préférence de forme sensiblement cylindrique, ce qui permet d'assurer une répartition du champ magnétique essentiellement le long de l'axe longitudinal du corps magnétique, mais là aussi il peut tout à fait être envisagé un corps magnétique présentant une forme géométrique autre, telle que parallélépipédique par exemple.  The magnetic bodies 25, 27 are preferably of substantially cylindrical shape, which makes it possible to ensure a distribution of the magnetic field essentially along the longitudinal axis of the magnetic body, but here again it can be envisaged a magnetic body. having a different geometric shape, such as parallelepiped for example.
Les dimensions des corps magnétiques sont en outre adaptées à la pièce à contrôler, c'est-à-dire que les corps magnétiques présentent des dimensions conformées pour que les corps magnétiques s'attirent entre eux de part et d'autre de la pièce.  The dimensions of the magnetic bodies are further adapted to the part to be controlled, that is to say that the magnetic bodies have dimensions shaped so that the magnetic bodies attract each other on both sides of the piece.
L'épaisseur des corps magnétiques varie en fonction de l'épaisseur de la pièce à contrôler, la surface de contact entre les corps magnétiques et la pièce à contrôler restant avantageusement inchangée quelle que soit l'épaisseur de ladite pièce.  The thickness of the magnetic bodies varies according to the thickness of the part to be controlled, the contact surface between the magnetic bodies and the part to be controlled advantageously remaining unchanged regardless of the thickness of said part.
Le dispositif 23 de contrôle comprend en outre des sondes ultrasonores émettrice 33 et réceptrice 35, la sonde émettrice 33 étant supportée par le corps magnétique 25 par l'intermédiaire d'une bague de maintien 37 solidaire du corps magnétique 25, et la sonde réceptrice 35 étant supportée par le corps magnétique 27 par l'intermédiaire d'une bague de maintien 39 solidaire du corps magnétique 27.  The control device 23 further comprises transmitting and receiving ultrasonic probes 33, the emitter probe 33 being supported by the magnetic body 25 via a retaining ring 37 integral with the magnetic body 25, and the receiving probe 35. being supported by the magnetic body 27 by means of a retaining ring 39 integral with the magnetic body 27.
Les bagues de maintien peuvent être fixées aux corps magnétiques par tout moyen de fixation connu de l'homme du métier, et peuvent également être en matériau magnétique de façon à ce que les corps magnétiques 25, 27 et/ou les bagues de maintien s'attirent. The retaining rings can be attached to the magnetic bodies by any fixing means known to those skilled in the art, and can also be magnetic material so that the magnetic bodies 25, 27 and / or the retaining rings attract.
Selon une alternative non représenté sur les figures, les sondes émettrice et réceptrice sont directement supportées par les corps aimantés, et sont positionnées directement sur les parois opposées aux parois 26 et 28 des corps magnétiques 25,27.  According to an alternative not shown in the figures, the emitter and receiver probes are directly supported by the magnetized bodies, and are positioned directly on the walls opposite the walls 26 and 28 of the magnetic bodies 25,27.
Les sondes ultrasonores émettrice 33 et réceptrice 35 comprennent en outre respectivement un transducteur ultrasonore émetteur et un transducteur ultrasonore récepteur, non représentés sur les figures. Les transducteurs ultrasonores utilisés sont bien connus de l'homme du métier et ne seront pas d'avantage décrits dans la présente description.  The transmitting and receiving ultrasound probes 33 further comprise, respectively, an emitter ultrasound transducer and an ultrasonic receiver transducer, not shown in the figures. The ultrasonic transducers used are well known to those skilled in the art and will not be further described in the present description.
En outre, les sondes 33, 35 sont destinées à être reliées à un dispositif d'acquisition et de traitement des données, non représenté.  In addition, the probes 33, 35 are intended to be connected to a device for acquiring and processing data, not shown.
Selon une caractéristique connue de l'art antérieur, au moins une des deux sondes peut être pilotée par un bras de commande, automatisé, qui permet le déplacement des deux sondes couplées magnétiquement.  According to a characteristic known from the prior art, at least one of the two probes can be controlled by an automated control arm, which allows the displacement of the two magnetically coupled probes.
Le procédé de contrôle selon l'invention est réalisé par les étapes suivantes.  The control method according to the invention is carried out by the following steps.
On positionne les deux corps magnétiques 25, 27 directement et respectivement sur les parois 29, 31 de la pièce 21 à contrôler, lesdits corps étant par exemple positionnés sensiblement en vis-à-vis l'un de l'autre afin d'assurer une bonne transmission des ondes depuis la sonde émettrice vers la sonde réceptrice. Ainsi, les corps magnétiques 25, 27 exercent une force d'attraction permettant un maintien mutuel, ou de l'un par l'autre, de part et d'autre de la pièce 21 .  The two magnetic bodies 25, 27 are positioned directly and respectively on the walls 29, 31 of the part 21 to be inspected, said bodies being for example positioned substantially opposite one another to ensure good wave transmission from the transmitting probe to the receiving probe. Thus, the magnetic bodies 25, 27 exert a force of attraction allowing a mutual maintenance, or of one by the other, on both sides of the part 21.
On positionne ensuite la sonde ultrasonore émettrice 33 sur le corps magnétique 25, dont le maintien est par exemple assuré grâce à la bague de maintien 37, puis on positionne sur le corps magnétique 27 la sonde ultrasonore réceptrice 35, par exemple maintenue au moyen de la bague de maintien 39.  The emitting ultrasonic probe 33 is then positioned on the magnetic body 25, the holding of which is for example ensured by means of the retaining ring 37, and then positioning on the magnetic body 27 the receiving ultrasonic probe 35, for example maintained by means of the retaining ring 39.
Le procédé de contrôle non-destructif par ultrasons en transmission selon l'invention peut en outre comprendre une étape visant à disposer un gel de couplage entre la sonde ultrasonore et le corps aimanté qui la supporte. Cela permet avantageusement d'assurer une bonne propagation des ondes ultrasonores dans la pièce 21 à contrôler. Il peut également être envisagé, alternativement ou en complément, d'humidifier la pièce à contrôler, par exemple par vaporisation. The method of non-destructive ultrasonic transmission control according to the invention may further comprise a step for arranging a coupling gel between the ultrasonic probe and the magnetic body that supports it. This advantageously makes it possible to ensure good propagation of the ultrasonic waves in the part 21 to be checked. It can also be considered, alternatively or in addition, moisten the part to be controlled, for example by spraying.
Les ondes ultrasonores se propagent successivement depuis le transducteur émetteur de la sonde 33 vers le corps magnétique 25, traversent le corps magnétique 25, puis traversent la pièce 21 à contrôler, puis traversent le corps magnétique 27 avant d'être captées par le transducteur récepteur de la sonde réceptrice 35.  The ultrasonic waves propagate successively from the transducer emitting the probe 33 to the magnetic body 25, pass through the magnetic body 25, then through the workpiece 21 to be controlled, and then through the magnetic body 27 before being picked up by the receiving transducer. the receiving probe 35.
Le dispositif selon l'invention est particulièrement avantageux lorsque l'on souhaite contrôler une pièce composite présentant un profil courbe, tel qu'un panneau acoustique sandwich par exemple. The device according to the invention is particularly advantageous when it is desired to control a composite part having a curved profile, such as a sandwich acoustic panel for example.
En effet, grâce à la présente invention, en prévoyant de disposer les corps magnétiques directement sur les parois de la pièce à contrôler, de part et d'autre de la pièce à contrôler, et en prévoyant une sonde émettrice et une sonde réceptrice chacune supportée par un corps magnétique, seul les corps magnétiques sont au contact des parois de la pièce à contrôler, ce qui permet de réduire sensiblement l'encombrement par rapport aux dispositifs connus de l'art antérieur.  Indeed, thanks to the present invention, by providing to arrange the magnetic bodies directly on the walls of the part to be controlled, on either side of the part to be controlled, and by providing a transmitting probe and a receiving probe each supported by a magnetic body, only the magnetic bodies are in contact with the walls of the part to be controlled, which makes it possible to reduce substantially the space requirement with respect to the devices known from the prior art.
En outre, grâce à la présente invention, la taille des corps magnétiques est optimisée, ce qui permet de bénéficier d'un bon rapport encombrement/poids/performance magnétique.  In addition, thanks to the present invention, the size of the magnetic bodies is optimized, which makes it possible to benefit from a good space / weight / magnetic performance ratio.
Enfin, le couplage magnétique des corps aimantés directement supportés par la pièce à contrôler permet également un bon alignement des sondes ultrasonores, et en conséquence une propagation optimale desdites ondes.  Finally, the magnetic coupling of the magnetized bodies directly supported by the part to be controlled also allows a good alignment of the ultrasonic probes, and consequently an optimal propagation of said waves.
Comme il va de soi, l'invention ne se limite pas aux seules formes de réalisation du dispositif de contrôle, décrites ci-dessus uniquement à titre d'exemples illustratifs, mais elle embrasse au contraire toutes les variantes faisant intervenir les équivalents techniques des moyens décrits ainsi que leurs combinaisons si celles-ci entrent dans le cadre de l'invention.  As goes without saying, the invention is not limited to the embodiments of the control device, described above only as illustrative examples, but it encompasses all the variants involving the technical equivalents of the means. described and their combinations if they fall within the scope of the invention.
A cet effet, la description fait référence à une pièce composite acoustique équipant notamment une nacelle pour turboréacteur d'aéronef. Il va de soi que le dispositif de contrôle et le procédé revendiqués ci-après ne sont en aucun cas limités au contrôle de ce type de pièce, mais concernent le contrôle de toute pièce composite, acoustique ou non.  For this purpose, the description refers to an acoustic composite part equipping including a nacelle for aircraft turbojet engine. It goes without saying that the control device and the method claimed below are in no way limited to the control of this type of room, but concern the control of any composite room, acoustic or not.

Claims

REVENDICATIONS
1 . Dispositif (23) pour le contrôle non-destructif d'une pièce composite (21 ), caractérisé en ce qu'il comprend : 1. Device (23) for non-destructive testing of a composite part (21), characterized in that it comprises:
- au moins deux corps magnétiques (25, 27), au moins l'un desdits au moins deux corps magnétiques étant adapté pour exercer une force d'attraction pour permettre un maintien mutuel, ou de l'un par l'autre, des corps magnétiques de part et d'autre de ladite pièce, lesdits corps magnétiques étant destinés à être positionnés directement sur au moins une paroi (29, 31 ) de la pièce à contrôler,  at least two magnetic bodies (25, 27), at least one of said at least two magnetic bodies being adapted to exert a force of attraction to allow a mutual maintenance, or one by the other, of the bodies magnetic devices on both sides of said part, said magnetic bodies being intended to be positioned directly on at least one wall (29, 31) of the part to be inspected,
- au moins une sonde ultrasonore émettrice (33) positionnée sur l'un desdits corps magnétiques, et au moins une sonde ultrasonore réceptrice (35) positionnée sur l'autre desdits corps magnétiques.  at least one emitting ultrasound probe (33) positioned on one of said magnetic bodies, and at least one receiving ultrasonic probe (35) positioned on the other of said magnetic bodies.
2. Dispositif (23) selon la revendication 1 , caractérisé en ce qu'au moins un desdits corps magnétiques (25, 27) comprend une bague de maintien (37, 39) conformée pour supporter au moins une desdites sondes (33, 35). 2. Device (23) according to claim 1, characterized in that at least one of said magnetic bodies (25, 27) comprises a retaining ring (37, 39) shaped to support at least one of said probes (33, 35) .
3. Dispositif (23) selon l'une des revendications 1 ou 2, caractérisé en ce qu'au moins un corps magnétique (25, 27) est de forme sensiblement cylindrique. 3. Device (23) according to one of claims 1 or 2, characterized in that at least one magnetic body (25, 27) is of substantially cylindrical shape.
4. Dispositif (23) selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'au moins un corps magnétique (25, 27) est réalisé en matériau magnétique dur tel qu'un alliage de néodyme, de fer et de bore. 4. Device (23) according to any one of claims 1 to 3, characterized in that at least one magnetic body (25, 27) is made of hard magnetic material such as a neodymium alloy, iron and boron.
5. Dispositif (23) selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la sonde ultrasonore émettrice (33) comprend en outre au moins un transducteur ultrasonore émetteur et en ce que la sonde ultrasonore réceptrice (35) comprend en outre au moins un transducteur ultrasonore récepteur. 5. Device (23) according to any one of claims 1 to 4, characterized in that the emitting ultrasonic probe (33) further comprises at least one emitting ultrasonic transducer and in that the ultrasonic receiving probe (35) comprises in in addition to at least one ultrasonic transducer receiver.
6. Ensemble (20) comprenant une pièce composite (21 ) à contrôler et au moins un dispositif (23) pour le contrôle non-destructif de ladite pièce, ledit dispositif comprenant au moins deux corps magnétiques (25, 27) et au moins une sonde ultrasonore émettrice (33) et au moins une sonde ultrasonore réceptrice (35), ledit ensemble étant caractérisé en ce que les corps magnétiques (25, 27) sont positionnés de part et d'autre de la pièce à contrôler (21 ), directement sur une paroi (29, 31 ) de ladite pièce, au moins l'un desdits au moins deux corps magnétiques exerçant une force d'attraction adaptée pour permettre un maintien mutuel, ou de l'un par l'autre, des corps magnétiques de part et d'autre de ladite pièce, et en ce que lesdites sondes ultrasonores émettrice (33) et réceptrice (35) sont respectivement positionnées sur l'un et l'autre desdits corps magnétiques (25, 27). An assembly (20) comprising a composite part (21) to be inspected and at least one device (23) for non-destructive testing of said part, said device comprising at least two magnetic bodies (25, 27) and at least one emitting ultrasound probe (33) and at least one receiving ultrasonic probe (35), said assembly being characterized in that the bodies magnetic devices (25, 27) are positioned on either side of the part to be controlled (21), directly on a wall (29, 31) of said part, at least one of said at least two magnetic bodies exerting a force of attraction adapted to allow mutual maintenance, or one by the other, of the magnetic bodies on either side of said part, and in that said emitting ultrasound probes (33) and receiving (35) are respectively positioned on one and the other of said magnetic bodies (25, 27).
7. Procédé de contrôle non-destructif d'une pièce composite par ultrasons en transmission, caractérisé en ce qu'il comprend en outre les étapes suivantes visant à : 7. A method of non-destructive testing of a composite ultrasound part in transmission, characterized in that it further comprises the following steps aimed at:
- positionner de part et d'autre de la pièce (21 ) à contrôler au moins deux corps magnétiques (25, 27), de façon à ce qu'au moins l'un desdits au moins deux corps magnétiques exerce une force d'attraction pour permettre un maintien mutuel, ou de l'un par l'autre, des corps magnétiques de part et d'autre de ladite pièce, lesdits corps magnétiques étant positionnés directement sur une paroi (29, 31 ) de la pièce à contrôler,  positioning on either side of the part (21) to control at least two magnetic bodies (25, 27), so that at least one of said at least two magnetic bodies exerts a force of attraction to allow a mutual maintenance, or one by the other, of the magnetic bodies on either side of said part, said magnetic bodies being positioned directly on a wall (29, 31) of the part to be checked,
- positionner au moins une sonde ultrasonore émettrice (33) sur l'un des corps magnétiques, et au moins une sonde ultrasonore réceptrice (35) sur l'autre des corps magnétiques.  positioning at least one emitting ultrasound probe (33) on one of the magnetic bodies, and at least one receiving ultrasonic probe (35) on the other of the magnetic bodies.
8. Procédé selon la revendication 7, caractérisé en ce qu'il comprend en outre une étape visant à humidifier la pièce (21 ) à contrôler, par exemple par vaporisation. 8. The method of claim 7, characterized in that it further comprises a step for moistening the part (21) to be controlled, for example by vaporization.
9. Procédé selon l'une des revendications 7 ou 8, caractérisé en ce que l'on positionne lesdits au moins deux corps magnétiques (25, 27) sensiblement en vis-à-vis l'un de l'autre. 9. Method according to one of claims 7 or 8, characterized in that said at least two magnetic bodies (25, 27) are positioned substantially vis-à-vis one another.
EP14830985.9A 2014-01-02 2014-12-18 Device and assembly for non-destructive testing of a composite part and method for non-destructive testing of a composite part by transmission ultrasound Withdrawn EP3090257A1 (en)

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FR1450013A FR3016045B1 (en) 2014-01-02 2014-01-02 DEVICE AND ASSEMBLY FOR NON-DESTRUCTIVE CONTROL OF A COMPOSITE WORKPIECE, AND NON-DESTRUCTIVE CONTROL METHOD OF ULTRASOUND COMPOSITE WORKPIECE IN TRANSMISSION
PCT/FR2014/053436 WO2015101732A1 (en) 2014-01-02 2014-12-18 Device and assembly for non-destructive testing of a composite part and method for non-destructive testing of a composite part by transmission ultrasound

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Also Published As

Publication number Publication date
FR3016045B1 (en) 2017-09-29
WO2015101732A1 (en) 2015-07-09
FR3016045A1 (en) 2015-07-03
CA2935078A1 (en) 2015-07-09
US20160305913A1 (en) 2016-10-20

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