EP2422581B1 - Procédé et dispositif de chauffage inductif d'un composant - Google Patents

Procédé et dispositif de chauffage inductif d'un composant Download PDF

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Publication number
EP2422581B1
EP2422581B1 EP10721105.4A EP10721105A EP2422581B1 EP 2422581 B1 EP2422581 B1 EP 2422581B1 EP 10721105 A EP10721105 A EP 10721105A EP 2422581 B1 EP2422581 B1 EP 2422581B1
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EP
European Patent Office
Prior art keywords
component
auxiliary body
coil
region
section
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.)
Active
Application number
EP10721105.4A
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German (de)
English (en)
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EP2422581A1 (fr
Inventor
Alexander Gindorf
Herbert Hanrieder
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.)
MTU Aero Engines AG
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MTU Aero Engines GmbH
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Application filed by MTU Aero Engines GmbH filed Critical MTU Aero Engines GmbH
Publication of EP2422581A1 publication Critical patent/EP2422581A1/fr
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Publication of EP2422581B1 publication Critical patent/EP2422581B1/fr
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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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • H05B6/365—Coil arrangements using supplementary conductive or ferromagnetic pieces
    • 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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/101—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces

Definitions

  • the present invention relates to apparatus and methods for inductively heating a component, and more particularly to apparatus and methods for coating a surface of a component or for producing a closing head on a rivet.
  • Inductive heating of a component or region of a component is part of many component processing processes.
  • One example is the coating of blade tips of turbine blades for axial compressors or turbines for gas turbine engines for aircraft or other mobile or stationary applications.
  • the preparation of such coatings is also referred to as tipcoding.
  • Methods in which coatings are applied by soldering and the component to be coated and / or the coating are heated inductively, are also referred to as induction soldering.
  • a radiant heater surrounds at a close distance the connecting body.
  • the connecting body is in a plasticized state, it is deformed by means of a forming die 11 to a rivet head.
  • Induction loops are provided around a punch-side and a die-side tool for non-contact heating of the parts to be joined.
  • An object of the present invention is to provide an apparatus and method for inductive heating, in particular for coating a surface of a component and for producing a closing head on a rivet.
  • a device for inductive heating of at least one region of a component comprises a coil device for generating a magnetic field at at least the region of the component. Furthermore, the device comprises an auxiliary body, which is designed so as not to be joined to the component (10), and to be arranged adjacent to the component in the magnetic field of the coil device so that the auxiliary body is in one direction to the component which is perpendicular or substantially perpendicular to the direction of a magnetic field which can be generated by the coil means in the region between the component and the auxiliary body.
  • the coil means may comprise one or more sub-coils, which may for example be arranged on both sides of the component and the auxiliary body.
  • a direction from a location to be heated or to be processed or from a center of a surface to be heated or processed to an opposite or adjacent location or center at the auxiliary body is meant by the direction of the opposing position.
  • the direction of the opposite and the direction of the magnetic field are substantially perpendicular if the angle between the two directions is at least 45 ° or at least 60 °, preferably at least 70 ° and particularly preferably at least 80 °.
  • the auxiliary body may comprise a diamagnetic or else a paramagnetic or ferromagnetic material, which may be electrically insulating or may have a defined or undefined electrical conductivity.
  • the magnetic properties of the auxiliary body and its electrical conductivity can be adapted to the component, the area of the component to be heated and to the material of the component, in particular the magnetic and electrical properties of the material, in the region to be heated. This adaptation can be done on the basis of tests or test series or by means of numerical simulation. The result of the adaptation can be in particular a defined spatial dependence of the electrical conductivity and the magnetic properties of the auxiliary body.
  • the auxiliary body may have a first surface portion whose shape is adapted to the shape of a second surface portion of the component.
  • the auxiliary body can then be designed to be arranged so that the first surface portion of the auxiliary body is opposite to the second surface portion of the component.
  • the adaptation of the shape of the first surface portion of the auxiliary body to the shape of the second surface portion of the component can in particular be such that at the intended relative arrangement of the auxiliary body and the component remains a defined gap between the two.
  • the width of the gap is, for example, constant or has a defined location dependence.
  • a holding device for holding the coil device, the component and the auxiliary body may be provided, wherein the holding device is formed so that the auxiliary body is the component in a direction opposite to the vertical or is substantially perpendicular to the direction of the magnetic field that can be generated by the coil means in the region between the component and the auxiliary body.
  • the coil device can have a first partial coil and a second partial coil and, between the first partial coil and the second partial coil, a gap, which is provided for the arrangement of the component and / or the auxiliary body. If a magnetic field generated by the first partial coil has a first direction in a middle region of the first partial coil and a magnetic field generated by the second partial coil has a second direction in a central region of the second partial coil, the first partial coil and the second partial coil can be arranged in this way in that the first direction and the second direction are the same or substantially the same. Both directions are substantially the same when the angle between the directions is at most 45 ° or at most 30 °, preferably at most 20 °, and more preferably at most 10 °.
  • the devices described above can be designed in particular for coating a surface of a component by high-temperature induction soldering.
  • a method for inductive heating of at least one region of a component at least the region of the component is arranged near a coil device.
  • An auxiliary body is disposed adjacent to the component so that the auxiliary body faces the component in a direction that is perpendicular or substantially perpendicular to the direction of a magnetic field generated by the coil device in the region between the component and the auxiliary body.
  • an alternating magnetic field is generated, which generates an eddy current field at least in the region of the component to be heated.
  • the auxiliary body is not joined with the component.
  • a coating material is first applied to the surface of the component to be coated. After that, with the inductive heating methods described above, at least one of the surface to be coated and the coating material is heated.
  • the component to be heated or the component whose surface is to be coated may be a blade for a stator or rotor disk of an axial compressor or a gas turbine.
  • the surface to be coated may be an end face of the blade, which is arranged at the intended for the blade operation on the outer circumference of the rotor disk or on the inner circumference of the stator.
  • the above described method of inductively heating at least a portion of a component may be used to fabricate a locking head on a rivet.
  • an area of the rivet to be reshaped to the closing head is first heated inductively by one of the methods described above. Then the heated area of the rivet is converted to the closing head.
  • the effect of the auxiliary body can in particular be based on the proximity effect, which is also referred to in German as a neighborhood effect.
  • the auxiliary body comprises an electrically conductive material
  • a change in the magnetic field generated by the coil means induces an eddy current field in the auxiliary body.
  • the eddy current field generates a counter magnetic field against the change of the magnetic field.
  • the eddy current field retards the penetration of the change in the magnetic field into the auxiliary body.
  • the auxiliary body can thus contribute to a concentration of an alternating magnetic field generated by the coil device in a region between the auxiliary body and the component.
  • the magnetic alternating field on the component is thereby reinforced.
  • FIGS. 1 and 2 show schematic representations of a component 10 and a device 20 for inductive heating of at least a portion of the component 10 in views from two different directions. In the sense of a clear representation not all features are in both Figures 1 and 2 shown because some features are clearly visible only in one of the two views. To clarify that the component 10 is not part of the device 20, the component 10 is shown with a broken line.
  • the component 10 has a region 12 to be heated.
  • the area to be heated 12 in this example is a thin layer under a surface portion 14 to be coated. In some applications, only heating of the surface portion 14 is required. In fact, however, at least a very thin layer under the surface portion 14 is heated.
  • the entire component 10 and in particular the one to be coated Surface portion 14 of the component 10 have a complex geometry. This is indicated here by a slight curvature of the surface section 14.
  • the device 20 for inductively heating at least the region 12, in particular the surface section 14 of the component 10, comprises a coil device 30 and an auxiliary body 40.
  • the coil device 30 comprises a first partial coil 32 and a second partial coil 34.
  • the coil device 30, in particular the partial coils 32 , 34 have electrical connections 36, which in FIG. 2 only at the sub-coil 34 are provided with a reference numeral. Via the electrical connections 36, the partial coils 32, 34 can be supplied with electrical power, in particular with an alternating current.
  • the sub-coils 32, 34 are arranged so that between the sub-coils 32, 34, a gap 38 is located.
  • FIG. 1 The direction of in FIG. 1 The view shown is perpendicular or substantially perpendicular to a plane to which the turns of the sub-coils 32, 34 are parallel or substantially parallel. In the illustration in FIG. 1 are the two sub-coils 32, 34 exactly above each other and therefore can not be distinguished.
  • the direction of the magnetic field generated by one of the two partial coils 32, 34 is in a central region of the respective partial coil 32, 34 perpendicular to the plane of the drawing FIG. 1 , When displayed in FIG. 2 is the plane to which the turns of the sub-coils 32, 34 are parallel, perpendicular to the plane and the magnetic field generated by one of the two sub-coils 32, 34 in the central region of the respective sub-coil 32, 34 parallel to the plane.
  • an auxiliary body 40 is arranged with a surface portion 44.
  • the surface portion 44 of the auxiliary body 40 is opposite to the surface portion 14 of the component 10.
  • a direction from a middle area of the surface portion 14 of the component 10 to a middle area of the surface portion 44 of the auxiliary body 40 is referred to as the direction of the opposing. It can be seen that this opposite direction exists in both Figures 1 and 2 each at least approximately lies in the plane of the drawing.
  • a gap 50 with a defined location-dependent, in particular constant width.
  • the area to be heated 12, in particular the surface portion 14 of the component 10, and the gap 50 are at least approximately in a central region of the gap 38 between the sub-coils 32, 34.
  • the direction of the magnetic field generated by the entire coil means 30 in the gap 50 is perpendicular to the plane in FIG. 1 and parallel to the drawing plane in FIG. 2 and thus perpendicular or substantially perpendicular to the direction of the opposite of the surface portion 14 of the component 10 and the surface portion 44 of the auxiliary body 40th
  • a holding device 60 is provided with a first carrier 62 for the component 10, a second carrier 64 for the coil device 30 and a third carrier 66 for the auxiliary body 40 , A connection of the partial coil 32 to the second carrier 64 or the holding device 60 is not shown in the sense of a clear representation.
  • the auxiliary body 40 may comprise a diamagnetic or even a paramagnetic or ferromagnetic material. Furthermore, the auxiliary body may have a defined location-dependent or constant electrical conductivity. The auxiliary body 40 is in particular not provided or designed to be joined to the component 10. Dimensions and shape of the coil sections 32, 34 and their relative arrangement can from the representation in the Figures 1 and 2 differ.
  • the partial coil 32, 34 may have a spacing which corresponds to the width of a partial coil.
  • each of the sub-coils 32, 34 may have a different shape from a rectangle or an oval with two parallel straight sections. Furthermore, the turns of the sub-coils 32, 34 need not be parallel to a plane.
  • FIGS. 3 and 4 show schematic flow diagrams of two methods.
  • reference numerals from the Figures 1 and 2 used.
  • the procedures are however both on components, which differ from the above on the basis of the FIGS. 1 and 2 shown, as well as with devices that differ from the above based on the Figures 1 and 2 distinguished, feasible.
  • FIG. 3 shows a schematic flow diagram of a method for coating a surface portion 14 of a component 10.
  • a coating material is applied to the surface portion 14 of the component 10 to be coated.
  • the surface portion 14 of the component 10 to be coated is arranged near a coil device 30, in particular in a gap between partial coils 32, 34 of the coil device 30.
  • an auxiliary body 40 is arranged adjacent to the component 10 such that the auxiliary body 40 faces the component 10 and in particular a surface portion 44 of the auxiliary body 40 to the surface portion 14 of the component 10 to be coated in a direction perpendicular or in the Is substantially perpendicular to a direction of a magnetic field that can be generated by the coil means 30 in the region between the component 10 and the auxiliary body 30.
  • an alternating magnetic field is generated by means of the coil device 30, which generates an eddy current field on the surface portion 14 of the component 10 to be coated. Due to the electrical resistance of the material of the component 10, the eddy current field heats the component 10, at least the region 12 in which the eddy current field is generated.
  • an eddy current field is generated in the coating material applied in the first step 101, which heats it. At the resulting elevated temperature at the surface 14 of the component and in the coating material, the coating material bonds to the surface 14 of the component.
  • the preparation of this compound may be a soldering operation, in particular a high-temperature soldering process.
  • FIG. 4 shows a schematic flow diagram of a method for producing a closing head on a rivet.
  • a rivet is placed in a hole in one or two elements to be mechanically connected together.
  • a region of the rivet to be reshaped to form the closing head is arranged near a coil device.
  • an auxiliary body is arranged adjacent to the rivet or to the element (s) such that the auxiliary body faces the rivet (s) in a direction that is perpendicular or substantially is perpendicular to the direction of a magnetic field generated by the coil means 30 in the region between the rivet and the elements and the auxiliary body.
  • a fourth step 114 an alternating magnetic field is generated by means of the coil device 30, which generates an eddy current field at least either in the region of the rivet to be heated or in the element (s).
  • a fifth step 115 the area of the rivet to be reshaped is converted into a closing head.
  • the second step 102 or 112 the third step 103 or 113 and the fourth step 104 or 114 form a method for inductive heating of at least one region of a component, for example a rivet or a blade for an axial compressor or a Turbine.
  • This method of inductive heating can also be used in the context of other processes.
  • the auxiliary body is not joined to the component. Instead, it can be reused when heating other components.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)

Claims (15)

  1. Dispositif (20) de chauffage inductif d'au moins une zone (12, 14) d'un composant (10), comprenant :
    un élément bobiné (30) pour la génération d'un champ magnétique sur au moins la zone (12, 14) du composant (10) ;
    un corps auxiliaire (40) qui est réalisé afin de ne pas être assemblé au composant (10) et afin d'être disposé de manière contiguë au composant (10) dans le champ magnétique de l'élément bobiné (30) de sorte que le corps auxiliaire (40) soit vis-à-vis du composant (10) dans une direction perpendiculaire ou sensiblement perpendiculaire à la direction d'un champ magnétique pouvant être généré par l'élément bobiné (30) dans la zone entre le composant (10) et le corps auxiliaire (40).
  2. Dispositif (20) selon la revendication précédente, dans lequel le corps auxiliaire (40) présente une première portion de surface (44), dont la forme est adaptée à la forme d'une seconde portion de surface (14) du composant (10), le corps auxiliaire (40) étant réalisé afin d'être disposé de sorte que la première portion de surface (44) du corps auxiliaire (40) soit vis-à-vis de la seconde portion de surface (14) du composant (10) .
  3. Dispositif (20) selon l'une quelconque des revendications précédentes, comprenant de plus :
    un dispositif de retenue (60) adapté pour retenir l'élément bobiné (30), le composant (10) et le corps auxiliaire (40) de sorte que le corps auxiliaire (40) soit vis-à-vis du composant (10) dans une direction qui est perpendiculaire ou sensiblement perpendiculaire à la direction du champ magnétique pouvant être généré par le dispositif de bobines (30) dans la zone entre le composant (10) et le corps auxiliaire (40).
  4. Dispositif (20) selon l'une quelconque des revendications précédentes, dans lequel l'élément bobiné (30) comprend une première bobine partielle (32) et une seconde bobine partielle (34) et, entre les bobines partielles (32, 34), un espace intermédiaire (38) qui est prévu pour l'agencement du composant (10).
  5. Dispositif (20) selon la revendication précédente, dans lequel la première bobine partielle (32) et la seconde bobine partielle (34) sont disposées de sorte que le champ magnétique généré par la première bobine partielle (32) présente une première direction dans une zone médiane de la première bobine partielle (32), et que le champ magnétique généré par la seconde bobine partielle (34) présente une seconde direction dans une zone médiane de la seconde bobine partielle (34), la première direction et la seconde direction étant identiques ou sensiblement identiques.
  6. Dispositif (20) selon l'une quelconque des revendications précédentes, le dispositif (20) étant réalisé pour le revêtement d'une portion de surface (14) d'un composant (10) par brasage par induction à haute température.
  7. Procédé de chauffage inductif d'au moins une zone (12, 14) d'un composant (10), comportant les étapes suivantes :
    agencement (102 ; 112) de l'au moins une zone (12, 14) du composant (10) près d'un élément bobiné (30) ;
    agencement (103 ; 113) d'un corps auxiliaire (40) à côté du composant (10) de sorte que le corps auxiliaire (40) soit vis-à-vis du composant (10) dans une direction qui est perpendiculaire ou sensiblement perpendiculaire à une direction d'un champ magnétique pouvant être généré par l'élément bobiné (30) dans la zone entre le composant (10) et le corps auxiliaire (40) ;
    génération (104 ; 114) d'un champ alternatif magnétique à l'aide de l'élément bobiné (30),
    le champ alternatif magnétique générant un champ à courant de Foucault au moins dans la zone (12, 14) du composant (10),
    le corps auxiliaire (40) n'étant pas assemblé au composant (10).
  8. Procédé selon l'une quelconque des revendications précédentes, dans lequel le corps auxiliaire (40) présente une première portion de surface (44), dont la forme est adaptée à la forme d'une seconde portion de surface (14) du composant (10), le corps auxi-liaire (40) étant disposé de sorte que la première portion de surface (44) du corps auxiliaire (40) soit en vis-à-vis à la seconde portion de surface (14) du composant (10).
  9. Procédé selon l'une quelconque des revendications précédentes, dans lequel le composant (10) et le corps auxiliaire (40) sont disposés respectivement au moins en partie dans un espace intermédiaire (38) entre une première bobine partielle (32) et une seconde bobine partielle (34) de l'élément bobiné (30).
  10. Procédé selon la revendication précédente, dans lequel la première bobine partielle (32) et la seconde bobine partielle (34) sont disposées de sorte que le champ magnétique généré par la première bobine partielle (32) présente une première direction dans une zone médiante de la première bobine partielle (32) et que le champ magnétique généré par la seconde bobine partielle (34) présente une seconde direction dans une zone médiane de la seconde bobine partielle (34), la première direction et la seconde direction étant identiques ou sensiblement identiques.
  11. Procédé de revêtement d'une section de surface (14) d'un composant (10), comportant les étapes suivantes :
    application (101) d'un matériau de revêtement sur la portion de surface à revêtir (14) du composant (10) ;
    chauffage au moins de la portion de surface (14) à revêtir ou du matériau de revêtement selon l'une quelconque des revendications précédentes.
  12. Procédé selon la revendication précédente, le composant (10) étant une pale pour un disque de stator ou rotor d'un compresseur axial ou d'une turbine à gaz, et la portion de surface à revêtir (14) étant une surface avant de la pale qui est disposée sur une périphérie extérieure du disque de rotor ou sur une périphérie intérieure du disque de stator.
  13. Procédé de fabrication d'une tête de fermeture sur un rivet, comportant les étapes suivantes :
    chauffage d'une zone à former en tête de fermeture d'un rivet selon l'une quelconque des revendications 7 à 10 ;
    formation (115) de la zone à former du rivet en une tête de fermeture.
  14. Procédé selon l'une quelconque des revendications précédentes, dans lequel un dispositif (20) selon l'une quelconque des revendications précédentes est utilisé.
  15. Procédé (20) selon l'une quelconque des revendications précédentes, le dispositif (20) étant réalisé pour la mise en oeuvre d'un procédé selon l'une quelconque des revendications précédentes.
EP10721105.4A 2009-04-23 2010-04-21 Procédé et dispositif de chauffage inductif d'un composant Active EP2422581B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009018684A DE102009018684A1 (de) 2009-04-23 2009-04-23 Verfahren und Vorrichtung zum induktiven Erwärmen eines Bauteils
PCT/DE2010/000450 WO2010121598A1 (fr) 2009-04-23 2010-04-21 Procédé et dispositif de chauffage inductif d'un composant

Publications (2)

Publication Number Publication Date
EP2422581A1 EP2422581A1 (fr) 2012-02-29
EP2422581B1 true EP2422581B1 (fr) 2013-06-12

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Application Number Title Priority Date Filing Date
EP10721105.4A Active EP2422581B1 (fr) 2009-04-23 2010-04-21 Procédé et dispositif de chauffage inductif d'un composant

Country Status (5)

Country Link
US (1) US20110268890A1 (fr)
EP (1) EP2422581B1 (fr)
CA (1) CA2749881A1 (fr)
DE (1) DE102009018684A1 (fr)
WO (1) WO2010121598A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011004530A1 (de) 2010-12-15 2012-06-21 Mahle International Gmbh Heizvorrichtung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4197441A (en) * 1978-05-01 1980-04-08 Thermatool Corporation High frequency induction welding with return current paths on surfaces to be heated
US4883216A (en) * 1988-03-28 1989-11-28 General Electric Company Method for bonding an article projection
DE19630488C2 (de) * 1996-07-26 1999-07-08 Boellhoff Gmbh Verfahren und Vorrichtung zum Fügen durch Umformen
DE10038158C5 (de) * 2000-08-04 2007-09-20 Kiefel Ag Verfahren und Vorrichtung zum Verbinden von Gegenständen mittels plastisch verformbarer Verbindungskörper
US20050061804A1 (en) * 2003-09-22 2005-03-24 Norman Golm Induction flux concentrator utilized for forming heat exchangers
CA2649366C (fr) * 2006-04-24 2013-01-08 Inductoheat, Inc. Traitement thermique par induction electrique de l'extremite d'un materiau tubulaire
DE102007027327A1 (de) * 2007-06-14 2008-12-18 Mtu Aero Engines Gmbh Induktionsspule, Verfahren und Vorrichtung zur induktiven Erwärmung von metallischen Bauelementen
DE102007054782A1 (de) * 2007-11-16 2009-05-20 Mtu Aero Engines Gmbh Induktionsspule, Verfahren und Vorrichtung zur induktiven Erwärmung von metallischen Bauelementen

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CA2749881A1 (fr) 2010-10-28
EP2422581A1 (fr) 2012-02-29
DE102009018684A1 (de) 2010-10-28
US20110268890A1 (en) 2011-11-03
WO2010121598A1 (fr) 2010-10-28

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