EP1057369B1 - Chauffage de metaux par induction - Google Patents

Chauffage de metaux par induction Download PDF

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Publication number
EP1057369B1
EP1057369B1 EP99906198A EP99906198A EP1057369B1 EP 1057369 B1 EP1057369 B1 EP 1057369B1 EP 99906198 A EP99906198 A EP 99906198A EP 99906198 A EP99906198 A EP 99906198A EP 1057369 B1 EP1057369 B1 EP 1057369B1
Authority
EP
European Patent Office
Prior art keywords
electric conductor
conductor
tube
workpiece
conductor according
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.)
Expired - Lifetime
Application number
EP99906198A
Other languages
German (de)
English (en)
Other versions
EP1057369A1 (fr
Inventor
Richard J. Bissdorf
Werner K. Harnisch
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.)
GH Induction Deutschland Induktions Erwarmungs Anlagen GmbH
Original Assignee
Gh Elin Deutschland Induktionserwaermung GmbH
G H ELIN DEUTSCHLAND INDUKTION
Gh Elin Deutschland Induktionserwarmung GmbH
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 Gh Elin Deutschland Induktionserwaermung GmbH, G H ELIN DEUTSCHLAND INDUKTION, Gh Elin Deutschland Induktionserwarmung GmbH filed Critical Gh Elin Deutschland Induktionserwaermung GmbH
Publication of EP1057369A1 publication Critical patent/EP1057369A1/fr
Application granted granted Critical
Publication of EP1057369B1 publication Critical patent/EP1057369B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H05B6/42—Cooling of coils
    • 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
    • H05B6/40—Establishing desired heat distribution, e.g. to heat particular parts of workpieces

Definitions

  • the present invention relates to the field of inductive heating of Workpieces, especially a shaping and clamping system for a flexible Inductor.
  • Inductive heating of metals in particular has many applications such as. bonding body parts, hardening and tempering Workpieces.
  • Conventional inductors consist of water-cooled rigid ones Copper pipes that are fixed in brackets near the workpiece. Since the Heating of the workpiece exponentially from the distance between the inductor and workpiece surface depends on, each workpiece shape must have its own Inductor can be created, on which corrections are difficult or impossible are.
  • a flexible inductor device is made of RWE Energy "inductive heating” (1991). It was used to fix the distance from a turbine runner this first provided with an insulating layer and around this one in one Hose loosely laid flexible cable and this when heated of the runner due to the eddy current that forms in this water cooled to the inductor against the heat conduction present despite the insulation to protect.
  • the distance of the flexible cable is determined by the on the Turbine rotor applied insulation winding, the hose wall thickness, which here in the Centimeter range and the irregular position of the conductor in the hose established.
  • the heating material is the The inductor shape is the distance between the current conductor and the workpiece surface only adjustable in the centimeter range and thus the thermal efficiency inductive heating relatively low.
  • the distance between the conductor in the hose and the workpiece surface also varies up to more than ⁇ 1 cm over the circumferential length.
  • the water cooling takes place only on the surface of the conductor and the remaining water channel allows only small flow rates in its cross section, so that only low current densities in the frequency range up to a maximum of 4 kHz can be used.
  • From DE-GM 17 33 800 is a cooled conductor for inductive heating of workpieces known, which is in contact with the wall of a Hose is fixable, also GB 2 122 057 discloses a (non-flexible) Inductor, the individual segments of which can be moved by means of holders.
  • EP 0 789 438 A2 and DE 195 04 742 A1 are further prior art and EP 0 774 816 A2.
  • the disadvantage in any case is that defined Distances between the inductor and workpiece and thus a precise performance input are not possible.
  • the SU-A 1 684 940 ultimately shows a flexible water-cooled conductor, but leaves open how the conductor is kept free of its walls.
  • the present invention has therefore set itself the task of creating a flexible inductor, in which nevertheless the distances to the workpiece surface are exactly maintained, but these can be varied in a very simple manner, in order to use it to either reproduce contours or produce temperature profiles in the workpiece and also during to be able to change the heating and to create more favorable cooling conditions for the current conductor in order to be able to work with the same conductor system at current densities up to 180 A / mm 2 and frequencies up to 200 kHz.
  • the flexible conductor is preferably a copper strand
  • the position fixation in the hose can e.g. through openwork rings pushed onto the conductor or through in the tube inserted and welded or glued pins accomplished become.
  • the hose has an internal profile, which holds the line offset coaxially or laterally parallel.
  • the hose itself can have a round, but also, if necessary, a square, e.g. have a square cross-section.
  • the tube itself is preferably fabric reinforced to match the wall thickness ( ⁇ 3 mm) even at higher coolant pressures, which is positive affects the removal of the heat reflected from the workpiece. simultaneously the efficiency is of course also increased by the more effective cooling.
  • the invention further proposes a tubular hollow wire as a conductor use, which gives the possibility to also the inside of the Apply coolant to the conductor, so that heat from the duct between Sheathed hoses and strands can also be derived from the internal cooling medium can, to thereby further increase the electrical efficiency.
  • the hollow strand advantageously has the tube profile supporting it in its interior Internals, which of course must also be flexible, or from separate, independent parts exist.
  • the distance between the inductor and the workpiece is determined according to the invention Brackets encompassing the hose and open towards the workpiece, in that the hose can be inserted anywhere.
  • the distances between the brackets are basically freely selectable.
  • the brackets are with Connected brackets, which are designed to change position and length desired contours of the workpiece, or the desired to be generated To be able to design heat profiles.
  • the inductor is flexible, the set position of the Inductor can be easily changed even during the heating itself. This opens up the possibility of the position of the brackets via a temperature measurement to control, e.g. withdraw after reaching a target value, for example to keep it constant after rapid heating.
  • the Brackets are assigned to temperature sensors, their measured value for this serves to adjust the inductor spacing with the help of spindle drives regulate.
  • a particularly elegant fixation of the current-carrying conductor is possible with one abutting the inner jacket of the hose, preferably from a Existing plastic spiral, the cooling medium spiraling around the Head is led.
  • the helix can be wound around the strand, it can but also manufactured as an inner profile of the hose or before installing the conductor be pushed into the hose as a separate part.
  • a new type of coolant power connection for a hollow strand Inductors consists of a metallic nipple with a connecting piece that has a longitudinal bore for the coolant supply and has a union nut on its head as a screw connection.
  • the Stutzen has at its free end an annular groove into which the hollow wire is inserted and e.g. is fixed in this by soldering or squeezing.
  • the power connection happens here via the free metal parts of the nipple, which in its Internal coolant flow and therefore also from excessive heating is protected.
  • FIG. 1 shows a tube 2 made of, in particular, fabric-reinforced plastic, in the interior of which the flexible conductor 1 is laid coaxially.
  • this consists of a strand whose diameter is adapted to the intended use.
  • the wall thickness of the hose is about 1 to 2 mm.
  • the inside of the tube is provided with profiles 3, which the Specify head 1 spatially with respect to the wall, so that a displacement of the Hose 2 to or from a workpiece the conductor to exactly the same extent moved and thus precise settings are made possible.
  • profiles 3, which the Specify head 1 spatially with respect to the wall so that a displacement of the Hose 2 to or from a workpiece the conductor to exactly the same extent moved and thus precise settings are made possible.
  • the warming exponentially (square) to the distance of the Conductor 1 behaves from the workpiece, so that relatively small distance errors are relatively have a strong impact.
  • the distance of the hose wall from the workpiece is typically about 2 mm.
  • the channels 8 can also communicate with each other.
  • the channels 8 can also communicate with each other.
  • the aforementioned small workpiece spacing to generate temperatures of over 800 ° C without additional insulation, without destroying the hose material.
  • the water pressure can be 3 to 10 bar, with a high water pressure the desired effect of stiffening the hose considerably so that it is under Print the characteristics of conventional water-flowed copper pipes receives and thus very precisely even with a larger distance between the brackets ( Figure 3, 4) can be positioned.
  • Figure 2 shows a variant in which the conductor 1 is offset (towards the workpiece).
  • the conductor 1 is located in a tube 9 which has spacers 10. These can have bores 11 through which the channels 8 are connected to one another to improve the heat transport.
  • the hoses 2 can of course also be designed in any shape other than round, for example with a square cross section, but this is more likely at low water pressures.
  • FIG. 3 shows a particularly preferred variant of the present invention, in which the conductor 1 is a tubular hollow wire. In the present case, this is centered by the profiles 3 and stabilized in its interior by a cross profile 12, which likewise forms channels 8 'for the cooling water supply. Since copper (stranded wire) is a good heat conductor and the meshes of the stranded wire are also flooded, the cooling of the hose is particularly good and a very high workpiece temperature is possible.
  • this figure shows the possibility of attaching the hose to any Support structures.
  • the hose 2 is in a bracket 4, the encloses the hose 2 at an angle greater than 180 ° and thus this clamps. Since there is no water pressure in the line when installing the inductor the hose is very easy to clamp in the clips 4, after applying water pressure, the hose 2 can be difficult or not without great force can be released.
  • the bracket indicates the workpiece directed an opening 6, which is dimensioned so that the durability of the clip 4 is not affected by too high a temperature, of course this is also cooled via the hose 2.
  • FIG. 4 shows a typical application on a curved workpiece, such as, for example, in automotive add-on parts, such as doors or flaps, where the outer and inner sheets have to be heated all round or in segments for the gluing.
  • a curved workpiece such as, for example, in automotive add-on parts, such as doors or flaps, where the outer and inner sheets have to be heated all round or in segments for the gluing.
  • the flexible inductor hose 2 the curved contour can be easily reproduced, the hose 2 being in the brackets 4, which are themselves connected to support plates 13 via brackets 7.
  • the brackets 7 have longitudinal adjustments 14, the plates 13 can be set up in height.
  • the temperature of the workpiece can be determined via temperature sensors and the distance to the workpiece 5 can then be regulated in order to be able to set the temperature exactly.
  • FIG. 5 shows an application in which a roller 19 (or a hollow shaft) is heated with rotation. This has a very different mass distribution and geometry over the length.
  • the flexible inductor hose 2 is so spaced with the help of brackets 4 or the brackets 7 and the adjustments 14 or corrected in this regard during heating that the distances correlate with the opposite mass segments, so that the same across the entire component width of the workpiece Temperature gradient is achieved.
  • Figure 6 shows a connecting nipple 18 for connecting the inductor hose 2 to the coolant (liquid. Gas).
  • This consists of metal (copper) and has a longitudinal bore 21 in its interior through which the cooling medium is supplied. On its head 22 this carries a union nut 20.
  • the hose 2 is pushed over the connecting piece 23 and secured with a hose clamp 17.
  • the connecting piece 23 has an annular groove 16, in which the hollow wire 24 is inserted and crimped or soldered.
  • a support body 25 e.g. on Cross profile (12, Fig. 3) stabilized and on the periphery of a coil 15th consisting of a plastic thread, which acts as a spacer to the inner jacket the hose 2 is used.
  • the cooling medium thus flows around the hollow strand 24 spiral, so that this is constantly from the hot side facing the workpiece is led to the opposite cold side. It becomes an im essential vortex-free flow of the cooling medium with maximum cross-section (without backflow).
  • the electrical contact is on the nipple 18 on a relatively short Realizable route and ensures a high flexibility of the Electricity / water connection.

Landscapes

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

Claims (14)

  1. Conducteur de courant refroidi par liquide ou par gaz, pour le chauffage par induction de pièces, constitué d'un conducteur flexible (1) ainsi que d'une gaine électriquement isolante (2) qui entoure ce dernier à distance, caractérisé en ce que le conducteur (1) est fixé parallèlement à l'axe dans la gaine (2) sans contact avec la paroi de celle-ci et peut être fixé à différents endroits par rapport à la pièce par l'intermédiaire de maintiens (7).
  2. Conducteur de courant selon la revendication 1, caractérisé en ce que la gaine (2) présente des profilations (3) orientées vers l'intérieur.
  3. Conducteur de courant selon la revendication 1 ou 2, caractérisé en ce que la gaine (2) est une gaine en matière synthétique renforcée par textile.
  4. Conducteur de courant selon l'une ou plusieurs des revendications 1 à 3, caractérisé en ce que le conducteur de courant (1) est un cordon creux (3).
  5. Conducteur de courant selon la revendication 4, caractérisé en ce que le cordon creux (3) présente à l'intérieur un appui flexible.
  6. Conducteur de courant selon l'une ou plusieurs des revendications 1 à 5, caractérisé en ce que ce dernier est alimenté en eau sous une pression de 10 à 30 bars.
  7. Conducteur de courant selon l'une ou plusieurs des revendications 1 à 6, caractérisé en ce que ce dernier est maintenu dans des pinces (4) qui présentent une ouverture (6) en direction de la pièce (5) à chauffer.
  8. Conducteur de courant selon la revendication 6 ou 7, caractérisé en ce que les pinces (4) sont fixées sur des maintiens (7) de longueur variable.
  9. Conducteur de courant selon la revendication 8, caractérisé en ce que des sondes de température sont associées aux pinces (4) et en ce que la distance entre la gaine (2) ou les pinces (4) séparées et la pièce peut être réglée en fonction de la température mesurée.
  10. Conducteur de courant selon la revendication 8, caractérisé en ce que les maintiens (7) peuvent être déplacés par des entraínements à tige filetée.
  11. Conducteur de courant selon l'une ou plusieurs des revendications 1 à 10, caractérisé en ce que le conducteur de courant (1) est entouré par une spirale (15) qui le fixe à l'intérieur de la gaine (2).
  12. Conducteur de courant selon l'une ou plusieurs des revendications 4 à 11, caractérisé en ce que les extrémités sont pincées sur une tubulure de raccordement (23) d'un mamelon métallique (18) qui présente à l'intérieur un alésage longitudinal, et la tubulure (23) est reliée au cordon creux (24) à son extrémité libre.
  13. Conducteur de courant selon la revendication 12, caractérisé en ce que le cordon creux (24) est maintenu dans une rainure annulaire (16) de la tubulure de raccordement (23).
  14. Conducteur de courant selon la revendication 12 ou 13, caractérisé en ce que le mamelon (18) présente une tête (22) contre laquelle est appliqué un écrou d'accouplement (20).
EP99906198A 1998-02-20 1999-01-23 Chauffage de metaux par induction Expired - Lifetime EP1057369B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19807099 1998-02-20
DE19807099A DE19807099C2 (de) 1998-02-20 1998-02-20 Induktive Erwärmung von Metallen
PCT/EP1999/000442 WO1999043187A1 (fr) 1998-02-20 1999-01-23 Chauffage de metaux par induction

Publications (2)

Publication Number Publication Date
EP1057369A1 EP1057369A1 (fr) 2000-12-06
EP1057369B1 true EP1057369B1 (fr) 2002-04-24

Family

ID=7858364

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99906198A Expired - Lifetime EP1057369B1 (fr) 1998-02-20 1999-01-23 Chauffage de metaux par induction

Country Status (7)

Country Link
US (1) US6323469B1 (fr)
EP (1) EP1057369B1 (fr)
AR (1) AR018288A1 (fr)
AT (1) ATE216828T1 (fr)
AU (1) AU2621499A (fr)
DE (2) DE19807099C2 (fr)
WO (1) WO1999043187A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040070938A1 (en) * 2001-01-04 2004-04-15 Hazelton Andrew J. Circulating system for a conductor
DE10203788A1 (de) * 2002-01-31 2003-08-21 Siemens Ag Elektrische Leiteranordnung und Verwendung der elektrischen Leiteranordnung
US7323666B2 (en) 2003-12-08 2008-01-29 Saint-Gobain Performance Plastics Corporation Inductively heatable components
CN101263756B (zh) * 2005-09-13 2010-09-01 株式会社自动网络技术研究所 车辆导体
WO2012065608A1 (fr) * 2010-11-19 2012-05-24 Andreas Nebelung Dispositif et procédé de chauffage inductif de composants métalliques lors du soudage à l'aide d'un élément inductif flexible refroidi
DE102010054363B3 (de) * 2010-12-13 2011-12-29 Benteler Automobiltechnik Gmbh Vorrichtung zur Wärmebehandlung von Langmaterial sowie Verfahren zum Wärmebehandeln eines Langmaterials
DE102011082611B4 (de) * 2011-09-13 2024-10-10 Franz Haimer Maschinenbau Kg Induktionsspuleneinheit
DE102011086212B4 (de) * 2011-11-11 2013-08-01 Universität Stuttgart Vorrichtung zur Verbindung zweier elektrischer Leitungen
DE102014015564A1 (de) * 2014-10-20 2016-04-21 Dynamic E Flow Gmbh Elektrische Kapillarleitereinheit
JP6440057B2 (ja) * 2014-05-16 2018-12-19 住友電工焼結合金株式会社 高周波加熱用コイル
CN104078145B (zh) * 2014-06-27 2017-01-25 安徽弘毅电缆集团有限公司 一种易散热型大载流量电力线缆
DE102017120725A1 (de) * 2017-09-08 2019-03-14 Lisa Dräxlmaier GmbH Entwärmungsvorrichtung für eine elektrische leitung, damit ausgestattete leitungsanordnung und verfahren zum entwärmen einer elektrischen leitung
DE102019205466A1 (de) * 2019-04-16 2020-10-22 Zf Friedrichshafen Ag Kabelmantel für eine Hochstromkabel eines Fahrzeugs
WO2024199601A1 (fr) 2023-03-28 2024-10-03 Kk Wind Solutions A/S Régulation de température d'un système électrique

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FR1390138A (fr) 1964-04-27 1965-02-19 Deutsche Edelstahlwerke Ag Bobine de chauffage par induction
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Also Published As

Publication number Publication date
US6323469B1 (en) 2001-11-27
AR018288A1 (es) 2001-11-14
AU2621499A (en) 1999-09-06
EP1057369A1 (fr) 2000-12-06
ATE216828T1 (de) 2002-05-15
DE19807099A1 (de) 1999-09-23
DE59901299D1 (de) 2002-05-29
WO1999043187A1 (fr) 1999-08-26
DE19807099C2 (de) 2000-02-17

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