EP2422581A1 - Method and apparatus for induction-heating a part - Google Patents
Method and apparatus for induction-heating a partInfo
- Publication number
- EP2422581A1 EP2422581A1 EP10721105A EP10721105A EP2422581A1 EP 2422581 A1 EP2422581 A1 EP 2422581A1 EP 10721105 A EP10721105 A EP 10721105A EP 10721105 A EP10721105 A EP 10721105A EP 2422581 A1 EP2422581 A1 EP 2422581A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- component
- coil
- auxiliary body
- magnetic field
- surface portion
- 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.)
- Granted
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims description 43
- 230000005291 magnetic effect Effects 0.000 claims abstract description 39
- 238000000576 coating method Methods 0.000 claims description 22
- 239000011248 coating agent Substances 0.000 claims description 20
- 230000001939 inductive effect Effects 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 11
- 230000006698 induction Effects 0.000 claims description 9
- 238000005476 soldering Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000005304 joining Methods 0.000 description 3
- 230000005292 diamagnetic effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 230000005298 paramagnetic effect Effects 0.000 description 2
- 239000002907 paramagnetic material Substances 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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 production 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.
- De 100 38 158 A1 describes a method for joining objects by means of plastically deformable connecting bodies.
- a radiant heating surrounds with narrow deviations stood 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.
- 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 can move in a directional manner to the component. is perpendicular to or substantially perpendicular to the direction of a magnetic field that 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 on the auxiliary body is meant by the direction of the opposite.
- the direction of the opposite and the direction of the magnetic field are substantially perpendicular if the angle between the two straightening conditions is at least 45 ° or at least 60 °, preferably at least 70 ° and particularly preferably at least 80 °.
- the auxiliary body can have a diamagnetic or else a paramagnetic or ferromagnetic material which may be electrically insulating or a defined or undefined one
- the magnetic properties of the auxiliary body and its electrical conductivity can be adapted to the component, the region 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 may be due to experiments or series of experiments 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
- Auxiliary body is the second surface portion of the component opposite.
- 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 dependency.
- a holding device for holding the coil device, the component and the auxiliary body can be provided, wherein the holding device is designed such that the auxiliary body lies opposite the component in one direction which is perpendicular or substantially perpendicular to the direction of the magnetic field that can be generated by the coil device 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 such 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 portion of the rivet is reshaped 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.
- 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
- 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. o The magnetic alternating field on the component is thereby reinforced.
- Figure 1 is a schematic representation of a device in a view from a first direction
- Figure 2 is a schematic representation of the device in a view from a second direction
- Figure 3 is a schematic flow diagram. 5
- Figures 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 o from two different directions. In the interests of a clear representation, not all features are shown in both FIGS. 1 and 2, since some features are clearly recognizable 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. 5 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 is heated below the surface portion 14. 0
- 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 are provided in Figure 2 only on the sub-coil 34 with a reference numeral.
- the partial coils 32, 34 can be supplied with electrical power, in particular with an alternating current, via the electrical connections 36.
- the sub-coils 32, 34 are arranged so that between the sub-coils 32, 34, a gap 38 is located.
- the direction of the view shown in FIG. 1 is perpendicular or substantially perpendicular to a plane to which the turns of the sub-coils 32, 34 are parallel or substantially parallel.
- the two partial coils 32, 34 lie exactly above one another and therefore can not be distinguished.
- the direction of the magnetic field generated by one of the two sub-coils 32, 34 is in a central region of the respective sub-coil 32, 34 perpendicular to the plane of the figure 1.
- Figure 2 is the plane to which the windings of Part coils 32, 34 are parallel, perpendicular to the plane and the magnetic field generated by one of the two coil sections 32, 34 in the central region of the respective coil part 32, 34 parallel to the plane of the drawing.
- 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 in both FIGS. 1 and 2 lies at least approximately 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 intermediate space 38 between the sub-coils 32, 34.
- the direction of the magnetic field generated by the entire coil device 30 in the gap 50 is perpendicular to the plane of the drawing in FIG. 1 and parallel to the plane of the drawing in FIG. 2 and thus perpendicular or substantially perpendicular to the direction of opposing the surface section 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 hip body 40 provided.
- 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 waist body 40 may comprise a diamagnetic or even a paramagnetic or ferromagnetic material. Furthermore, the hip body can have a defined location-dependent or constant electrical conductivity. The hip body 40 is in particular not intended or designed to be joined to the component 10. Dimensions and shape of the sub-coils 32, 34 and their relative arrangement may differ from the illustration in Figures 1 and 2. For example, the partial coil 32, 34 may have a spacing which corresponds to the width of a partial coil. Further, 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 flowcharts of two methods.
- reference numerals from FIGS. 1 and 2 are used below. The methods are, however, both on components that differ from the above with reference to FIGS 2 and 2 as well as devices different from those described above with reference to FIGS. 1 and 2.
- FIG. 3 shows a schematic flow diagram of a method for coating a surface section 14 of a component 10.
- a coating material is applied to the surface section 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 at the first step 101, which heats the latter.
- the coating material bonds to the surface 14 of the component.
- the preparation of this compound may be a soldering process, in particular a high temperature soldering.
- 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 area of a component, for example a rivet or 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 in particular with the component. Instead, it can be reused when heating other components.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Induction Heating (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009018684A DE102009018684A1 (en) | 2009-04-23 | 2009-04-23 | Method and device for inductive heating of a component |
PCT/DE2010/000450 WO2010121598A1 (en) | 2009-04-23 | 2010-04-21 | Method and apparatus for induction-heating a part |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2422581A1 true EP2422581A1 (en) | 2012-02-29 |
EP2422581B1 EP2422581B1 (en) | 2013-06-12 |
Family
ID=42549435
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10721105.4A Active EP2422581B1 (en) | 2009-04-23 | 2010-04-21 | Method and apparatus for induction-heating a part |
Country Status (5)
Country | Link |
---|---|
US (1) | US20110268890A1 (en) |
EP (1) | EP2422581B1 (en) |
CA (1) | CA2749881A1 (en) |
DE (1) | DE102009018684A1 (en) |
WO (1) | WO2010121598A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011004530A1 (en) | 2010-12-15 | 2012-06-21 | Mahle International Gmbh | heater |
Family Cites Families (8)
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 (en) * | 1996-07-26 | 1999-07-08 | Boellhoff Gmbh | Method and device for joining by forming |
DE10038158C5 (en) * | 2000-08-04 | 2007-09-20 | Kiefel Ag | Method and device for connecting objects by means of plastically deformable connecting body |
US20050061804A1 (en) * | 2003-09-22 | 2005-03-24 | Norman Golm | Induction flux concentrator utilized for forming heat exchangers |
CA2649366C (en) * | 2006-04-24 | 2013-01-08 | Inductoheat, Inc. | Electric induction heat treatment of an end of tubular material |
DE102007027327A1 (en) * | 2007-06-14 | 2008-12-18 | Mtu Aero Engines Gmbh | Induction coil, method and device for inductive heating of metallic components |
DE102007054782A1 (en) * | 2007-11-16 | 2009-05-20 | Mtu Aero Engines Gmbh | Induction coil, method and device for inductive heating of metallic components |
-
2009
- 2009-04-23 DE DE102009018684A patent/DE102009018684A1/en not_active Ceased
-
2010
- 2010-04-21 EP EP10721105.4A patent/EP2422581B1/en active Active
- 2010-04-21 WO PCT/DE2010/000450 patent/WO2010121598A1/en active Application Filing
- 2010-04-21 US US13/138,125 patent/US20110268890A1/en not_active Abandoned
- 2010-04-21 CA CA2749881A patent/CA2749881A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2010121598A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2010121598A1 (en) | 2010-10-28 |
US20110268890A1 (en) | 2011-11-03 |
EP2422581B1 (en) | 2013-06-12 |
DE102009018684A1 (en) | 2010-10-28 |
CA2749881A1 (en) | 2010-10-28 |
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