EP0765591B1 - Dispositif de chauffage inductif par champ transversal de produits metalliques plats - Google Patents

Dispositif de chauffage inductif par champ transversal de produits metalliques plats Download PDF

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Publication number
EP0765591B1
EP0765591B1 EP95921684A EP95921684A EP0765591B1 EP 0765591 B1 EP0765591 B1 EP 0765591B1 EP 95921684 A EP95921684 A EP 95921684A EP 95921684 A EP95921684 A EP 95921684A EP 0765591 B1 EP0765591 B1 EP 0765591B1
Authority
EP
European Patent Office
Prior art keywords
lead
inductors
conductor
inductor
goods
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
EP95921684A
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German (de)
English (en)
Other versions
EP0765591A1 (fr
Inventor
Dieter Schluckebier
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.)
Otto Junker GmbH
Original Assignee
Otto Junker 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 Otto Junker GmbH filed Critical Otto Junker GmbH
Publication of EP0765591A1 publication Critical patent/EP0765591A1/fr
Application granted granted Critical
Publication of EP0765591B1 publication Critical patent/EP0765591B1/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
    • H05B6/10—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
    • H05B6/103—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces multiple metal pieces successively being moved close to the inductor
    • H05B6/104—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces multiple metal pieces successively being moved close to the inductor metal pieces being elongated like wires or bands
    • 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
    • H05B6/362—Coil arrangements with flat coil conductors

Definitions

  • the invention relates to a device for inductive cross-field heating of flat metallic goods, e.g. of tapes and plates, with at least one pair of inductors, one Forms an intermediate space for the passage of the good and its Inductors each have an iron core in the direction of transport running, each receiving a conductor Has grooves, the grooves and conductors of the inductors of a pair of inductors each mirror the same.
  • DE-OS 39 28 629 is a device for inductive Heating flat metallic goods known to involve several switchable conductor loops are provided, each with two ladder parts, the right one Conductor part just as far from the right edge of the inductor is like the left part of the ladder from the left edge of the Inductor. By switching these conductor loops on or off the effective width of the inductor can be adapted to the crop width will. All conductor loops are switched on effective at the same time, there is no clocking.
  • WO 93/11650 describes a device for inductive Heating with two conductor systems per inductor is known. This creates a conductor system across the width of the metallic goods are considered to be roughly sinusoidal Course of the induced current density, the period of Width of the goods corresponds. To achieve the desired Course and thus to reach the associated pole width is a number of adjacent conductors of this conductor system flowed through in the same direction. The width of the Pole is determined by the desired match of period length and width of the goods determined by the latter. This first conductor system thus generates one approximately sinusoidal course of the temperature in the to be heated Good.
  • the second conductor system now also produces across the width of the material to be heated has a sinusoidal course of the induced Current density, but about ⁇ / 4 compared to the first Ladder system offset so that through this second ladder system precisely the places of the metallic goods most warmed that were previously minimally warmed by the first conductor system.
  • the two conductor systems are consecutive switchable. Working with just one ladder system would do so result in a very different temperature distribution and cannot be accepted.
  • the disadvantage of this arrangement is that the Inductor predetermined sinusoidal distribution of the induced Current density only to a certain width of the to be heated metallic good. Furthermore, with this device complex measures to avoid edge overheating in the metallic goods are operated.
  • the solution achieved this task in that the conductor of an inductor each form two switchable conductor systems, each Conductor system in the direction of transport has, whose averaging lines are symmetrical to a parallel to Transport direction extending, inductor-centered axis arranged are that the individual poles formed by the conductor systems are formed by a maximum of two conductors and that between neighboring poles each formed by the one conductor system a pole formed by the other conductor system is arranged.
  • the poles can Be narrow, so that the temperature distribution across the width of the metallic good considered a fairly high uniformity.
  • the the second conductor system with its poles is now between the Tru of the first conductor system and produced with a time delay a maximum density of the induced just at the points Eddy currents at which the first conductor system has a minimal Density generated. This results in a smoothing of the temperature profile.
  • the two ladder systems are timed switched one after the other because at the same time it is loaded with electricity due to the then short distances between two neighboring ones, through which electricity flows simultaneously Conductors would reduce the efficiency of the inductor. The Switching the two conductor systems in series thus brings about almost without loss in the efficiency of the inductor the density of the inductor lines.
  • the required Symmetry refers to a non-straight line Course of the ladder on averaging lines of the ladder sections, seen in the direction of transport from one to the the other end of the inductor.
  • both edges of the metallic good can match these edges, e.g. to avoid edge overheating, equally be influenced.
  • both conductor systems are switchable, especially the conductor system, which acts on these marginal areas on average with a lower power.
  • the device according to the invention can also be designed that the individual poles formed by the one conductor system each of two conductors and that of the other conductor system Poles formed are each formed by a conductor.
  • the device according to the invention can be designed in this way be that the grooves and conductors of the inductors are straight, zigzag or wavy.
  • the device according to the invention can be designed in this way be that the cores of inductors in the direction of transport Core sections are divided.
  • the device according to the invention can also do so be trained that the inductors and the material to be heated can be aligned relative to one another in the inductor center.
  • the metallic material can always be used as an inductor be aligned so that the conductor systems are symmetrical to the center of the metallic good. This is a requirement for the even heat treatment of both edges of the metallic Good.
  • the device can be operated so that the two Conductor systems connected in succession to the same power source will.
  • the device can also be operated so that the two conductor systems to the respective power source can be connected.
  • the device can be operated so that the two conductor systems at intervals to the respective power source can be connected.
  • Fig. 1 is an inductor 1 and dashed that to be heated Well 2.3 shown in two different widths.
  • the inductor 1 has a core that is divided into four core sections 4,5,6,7 is divided. These have core sections 4,5,6,7 Grooves 8, which are in alternating alignment to that by the Arrow indicated transport direction of the metallic goods 2.3 are inclined. In the embodiment, they run zigzag. In these grooves 8 are conductors 9, 10 of the inductor 1 arranged, which is consequently also zigzag run.
  • the conductor 9 has its own power connections 11, 12 and conductor 10 also has its own power connections 13, 14, so that two of them independent ladder systems are formed.
  • the second line system with the conductor 10 used its conductor sections, as an example in Fig. 1 can be seen on the conductor sections 17, 18, between the poles of the other conductor 9 run.
  • the conductors 9.10 occurs the maximum heating of the metallic good 2,3 through a conductor 9 straight in the areas of the metallic goods 2,3, in which the other conductor 10 has generated a minimum temperature.
  • the two conductor systems with their conductors 9, 10 are separated are switchable from each other, they can be timed Means different services are supplied. This can e.g. happen by the fact that the duration of the Current applied to one conductor system compared to the of the other conductor system is shortened. It is also possible to connect the conductor systems to two different ones, not here shown inverters to connect and with different Frequencies to feed.
  • Fig. 2 shows an inductor 21 whose core as in the previously described Inductor 1 divided into four sections 22,23,24,25 is, and in which also grooves 26 inclined to the indicated by the arrow transport direction of the to be heated Good 27 run.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Induction Heating (AREA)
  • Constitution Of High-Frequency Heating (AREA)

Claims (5)

  1. Dispositif de chauffage inductif par champ transversal d'un produit métallique plat (2, 3; 27), par exemple de bandes et de tôles, avec au moins une paire d'inducteurs, qui forment un intervalle pour le passage du produit (2, 3; 27) et dont les inducteurs (1; 21) possèdent chacun un noyau de fer (4-7; 22-25), qui présente des encoches (8; 26) contenant chacune un conducteur de courant (9, 10; 28, 29), orientées dans le sens du transport, les encoches (8; 26) et les conducteurs (9, 10; 28, 29) des inducteurs (1; 21) d'une paire d'inducteurs étant disposés de façon parfaitement symétrique, caractérisé en ce que les conducteurs (9, 10; 28, 29) d'un inducteur (1; 21) forment chacun deux systèmes de conducteurs commutables en eux-mêmes, où chaque système de conducteurs possède des tronçons de conducteur (15-18; 20) orientés dans le sens du transport, dont les droites moyennes (19) sont disposées symétriquement par rapport à un axe central de l'inducteur, orienté parallèlement au sens du transport, en ce que les divers pôles formés par les systèmes de conducteurs sont formés au maximum par deux conducteurs (9, 10; 28, 29) et en ce qu'entre des pôles voisins formés par le premier système de conducteurs est disposé un pôle formé par l'autre système de conducteurs.
  2. Dispositif suivant la revendication 1, caractérisé en ce que les divers pôles formés par un premier système de conducteurs sont chacun formés par deux conducteurs (29) et en ce que les pôles formés par l'autre système de conducteurs sont formés par un seul conducteur (28).
  3. Dispositif suivant la revendication 1 ou 2, caractérisé en ce que les encoches (8; 26) et les conducteurs (9, 10; 28, 29) des inducteurs (1; 21) sont rectilignes, en zig-zag ou de forme ondulée.
  4. Dispositif suivant l'une quelconque des revendications précédentes, caractérisé en ce que les noyaux des inducteurs sont divisés en tronçons de noyau (4-7; 22-25) dans le sens du transport.
  5. Dispositif suivant l'une quelconque des revendications précédentes, caractérisé en ce que les inducteurs (1; 21) et le produit à chauffer (2, 3; 27) peuvent être alignés l'un par rapport à l'autre au milieu de l'inducteur.
EP95921684A 1994-06-15 1995-06-13 Dispositif de chauffage inductif par champ transversal de produits metalliques plats Expired - Lifetime EP0765591B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4420553 1994-06-15
DE4420553 1994-06-15
PCT/DE1995/000757 WO1995035013A1 (fr) 1994-06-15 1995-06-13 Procede et dispositif de chauffage inductif par champ transversal de produits metalliques plats

Publications (2)

Publication Number Publication Date
EP0765591A1 EP0765591A1 (fr) 1997-04-02
EP0765591B1 true EP0765591B1 (fr) 1998-11-25

Family

ID=6520428

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95921684A Expired - Lifetime EP0765591B1 (fr) 1994-06-15 1995-06-13 Dispositif de chauffage inductif par champ transversal de produits metalliques plats

Country Status (5)

Country Link
US (1) US5818013A (fr)
EP (1) EP0765591B1 (fr)
AT (1) ATE173875T1 (fr)
DE (1) DE59504341D1 (fr)
WO (1) WO1995035013A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2808163B1 (fr) * 2000-04-19 2002-11-08 Celes Dispositif de chauffage par induction a flux transverse a circuit magnetique de largeur variable
FR2890824B1 (fr) * 2005-09-15 2007-11-23 Commissariat Energie Atomique Four de fusion a dispositif inducteur a une seule spire compose d'une pluralite de conducteurs
EP2045340A1 (fr) * 2007-09-25 2009-04-08 ArcelorMittal France Culasse feuiletee refendue en peigne pour inducteur a champ magnetique traversant de rechauffage de bandes metalliques
DE102009026236A1 (de) * 2009-07-23 2011-04-07 Atn Automatisierungstechnik Niemeier Gmbh Verfahren zum stoffschlüssigen Verbinden von Fügepartnern
JP6201777B2 (ja) * 2013-06-27 2017-09-27 トヨタ車体株式会社 誘導加熱乾燥装置
EP2838123B1 (fr) * 2013-08-14 2016-03-16 Komax Holding AG Dispositif de soudure destiné à relier des cellules solaires

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB712066A (en) * 1951-02-03 1954-07-14 Asea Ab High-frequency electromagnetic induction means for heating metallic strips
DE1158194B (de) * 1962-06-22 1963-11-28 Zd Y Elektrotepelnych Zarizeni Induktoranordnung zur induktiven Erwaermung von durchlaufenden Metallbaendern
US4122321A (en) * 1977-02-16 1978-10-24 Park-Ohio Industries, Inc. Induction heating furnace
GB8505811D0 (en) * 1985-03-06 1985-04-11 Bekaert Sa Nv Induction heating
DE3928629A1 (de) * 1989-08-30 1991-03-14 Junker Gmbh O Vorrichtung zum induktiven erwaermen von flachem metallischem gut
GB2262420B (en) * 1991-12-03 1995-02-08 Electricity Ass Tech Induction heating apparatus
US5308946A (en) * 1992-02-06 1994-05-03 Mohr Glenn R Induction heating apparatus and method for heating metal strips and slabs

Also Published As

Publication number Publication date
US5818013A (en) 1998-10-06
DE59504341D1 (de) 1999-01-07
WO1995035013A1 (fr) 1995-12-21
ATE173875T1 (de) 1998-12-15
EP0765591A1 (fr) 1997-04-02

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