DE903977C - Eddy current heater - Google Patents

Eddy current heater

Info

Publication number
DE903977C
DE903977C DES8358D DES0008358D DE903977C DE 903977 C DE903977 C DE 903977C DE S8358 D DES8358 D DE S8358D DE S0008358 D DES0008358 D DE S0008358D DE 903977 C DE903977 C DE 903977C
Authority
DE
Germany
Prior art keywords
workpiece
heating device
movement
eddy current
extended
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
Application number
DES8358D
Other languages
German (de)
Inventor
Hans Trassl
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to DES8358D priority Critical patent/DE903977C/en
Application granted granted Critical
Publication of DE903977C publication Critical patent/DE903977C/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00Heating by electric, magnetic or electromagnetic fields
    • H05B6/02Induction heating
    • H05B6/10Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/101Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces
    • H05B6/103Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces multiple metal pieces successively being moved close to the inductor
    • H05B6/104Induction 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
  • Heat Treatment Of Articles (AREA)

Description

Die Erfindung betrifft Wirbelst!romheizeinrichtungen .zum einseitigen Erhitzen von Werkstücken unter gegenseitiger Verschiebung von Werkstück und Heizzinrichtung. Bei Verwendung derartiger Heizeinrichtungen zeigt es sliich oft, idaß Idas- Weirkstück ungleichmäßig erwärmt wird, z. B. in der Mitte stärker als an den zur Bewegungsrichtung etwa parallelen Rändern ,des Werkstückes. In ,den meisten Fällen- ist ,das auf Randstreuung -bzw. auf durch die Erhitzung bedingte unigleichmäßige Krümmungen der Werk stückoberfläche zurückzuführen. Zur Bekämpfung .dieser Schwierigkeiten ist bereits vorgeschlagon. worden, Idas Werkstück mit einem Rahmen zu umgeben, ider .aus dem ,gleichen Stoff wie Idas Werkstück besteht. Dieser Rahmen w,i:rd zugleich (mit ,dem Werkstück erhitzt. Der Erfolg vst der gleiche wie wenn aus einem größeren Werkstück nur der vollkommen gleichmäßig erwärmte mittlere Teil herauisge@schniitten und ver-wertetwürde. Diese Einrichtung hat jedoch den Nachteil, daß zusätzliche Leistung zum Erwärmen des Rahmens verbraucht und der Rahmen nach einiger Zeit unbrauchbar wird, so .daß er ersetzt werden muß.The invention relates to eddy current heating devices on one side Heating of workpieces with mutual displacement of workpiece and heating device. When using such heating devices it often shows that Idas-Weirkstück is heated unevenly, e.g. B. in the middle stronger than on the direction of movement roughly parallel edges of the workpiece. In, for the most part, that is due to headland spreading -respectively. due to the heating caused uneven curvatures of the workpiece surface traced back. To combat these difficulties has already been proposed. to surround Ida's workpiece with a frame, that is, made of the same material how Ida's workpiece is made. This frame w, i: rd at the same time (with, the workpiece heated. The success is the same as if only complete from a larger workpiece evenly heated middle part cut out and recycled. These However, the device has the disadvantage that additional power to heat the frame used up and the frame becomes unusable after a while, so that it is replaced must become.

Erfindungsgemäß wird auf einfache Weise eine besonders -gleichmäßige Erwärmung der Werkstücke erzielt, indem,die ,dein Werkstück zugekehrte i@,lirksiarne Fläche ides, Eisenkörpers, der Heizeinrichtung örtlich, z. B. an,den Rändern, -Inn Bewegungsrichtung verlängert wird, wobei eis natürlich auf kleine von,der Bewegunigsmichtung nicht ankommt. Zweckmäßig ist dabei die dem Werkstück zugewandte Fläche des. Eisenkörpers an der zuerst =auf dass Werkstück ,zur Wirkung gelangenden Seite aibgetreppt, wobei sie zweckmäßig idie größte., in der Beiwegun@gsrichtumig gemessene Länge an den Rändern, die kleinste in:. der Mitte besitzt.According to the invention, a particularly uniform one is obtained in a simple manner The workpieces are heated by, the, your workpiece facing i @, lirksiarne Area ides, iron body, the heating device locally, z. B. at, the edges, -Inn Direction of movement is lengthened, with ice of course to small from, the direction of movement does not arrive. The surface of the iron body facing the workpiece is expedient on the first = on the workpiece, the side that comes into effect is stepped, where it is expedient to have the largest, incorrectly measured length on the bypass Margins, the smallest in: the middle owns.

Beispielsweise können, je nachdem, ob die W irbelstramheiizeinrichtung i gemäß den Fig. i @d 2 -mit quer zur Bewegungsrichtung liegenden Spulenseiten der Erregerwidkliu @nig 2 oder- mitt in Bewegungsrichtung liegenden Spulenseiten, der E,rregerwiCkl.unig 3, ü-,ie in i Fig. 3 gezeigt, ausgeführt ist, entweder zusätzliche Wicleliuivgem, 4, 5 an; den verlängerten Teilen 6, 7 dies Eisenkörpers an6e"oridnet oder, idie Spulenseiten der Teiderregerwicklungen 8, 9 an den verlängerten Teilen 6, 7 des Eisenkörpeins entsprechend verlängert ,sein,. Sowohl die Wi@ckliun@geni 4, 5 .alis auch die Wicklungen 8, 9 können regelbar geh falten :sein. Die Teilwicklungen können stets getrennt ,und gegebene nifalls -mit Strömen, verschiedener Frequenz gespeist bzw. mit verschiedenen Leistungen betrieben wenden:. Auf diese Weise kann eine gleichmäßlige Erwärmung ides Werkstückes auch dann erzielt werden, wenn es große Abmessungen besitzt und sich so verzieht, idaß der Luftspalt zwischen, Werkstück und -sehr ungleichmäßig,wi:rd.For example, depending on whether the W irbelstramheiizeinrichtung i according to FIGS. i @d 2 -with transverse to the direction of movement of the coil sides Erregerwidkliu @nig 2 or - with the coil sides lying in the direction of movement, the E, rregerwiCkl.unig 3, ü-, ie shown in i Fig. 3, is executed, either additional Wicleliuivgem, 4, 5 at; the elongated parts 6, 7 of this iron body an6e "oridnet or, i the coil sides of the partial exciter windings 8, 9 on the extended parts 6, 7 of the iron body extended accordingly. Both the Wi @ ckliun @ geni 4, 5 .alis also the windings 8, 9 can fold adjustable go: be. The partial windings can always be separated, and given nifalls - with currents, different frequencies fed or operated with different services :. That way you can a uniform heating of the workpiece can also be achieved if it Has large dimensions and warps so that the air gap between the workpiece and -very unevenly, wi: approx.

Die in Iden, Fig. i bis 3 gezeigten Heizeinrichtuivgen können entweder mit einem Eiisenkörper ausgeführt werden, #der gleich der We@rkstückbreite ist, oder auch etwas breiter sein.The Heizeinrichtuivgen shown in Iden, Fig. I to 3 can either be executed with an iron body, # which is equal to the workpiece width, or be a little wider.

In allen drei Figuren wurde die Bewegungsrichtung des WerkstückesAurch: einen Pfeil, angedeutet.In all three figures, the direction of movement of the workpiece was determined by: an arrow, indicated.

Claims (5)

PATENTANSPRÜCHE: i. Wirbeistromheizeinrichtung zum einseitigen Erhitzen von Werkstücken: unter gea°'enseitiger Verschiebung von Werkstück und Heizeinrichtung, dadurch gekennzeichnet, daß die idem Wemkstück zugekehrte wirksarneFläehe des Eisenkörpers :der Heizeinrichtung ärtlüch, z. B. an, @denr Rämfdern, in Bewegungsrichtung verlängert eist. PATENT CLAIMS: i. Eddy current heating device for one-sided heating of workpieces: with the appropriate displacement of workpiece and heating device, characterized in that the active surface of the iron body facing the workpiece : the heating device ärtlüch, z. B. at, @denr Rämfdern, extended in the direction of movement ice. 2. Wirbelstromheäzeinrichtwng nach Anspruch i, dadurch gekennzeichnet, ;daß,die dem Werkstück zugewandte Fläche des Eisenkörpers an (der zuerst auf Idas Werkstück :zur Wirkung gelangenden Seite abgetreppt ist,- wobei sie z@wecikmäß,ig (die größte in oder Bewegungsrichtung gemessene Länge an Iden die kleinste in der Mitte besitzt. 2. Eddy current heating device according to claim i, characterized in that; the surface of the iron body facing the workpiece (the first on Ida's workpiece : the effective side is stepped, - whereby it z @ wecikäß, ig (the largest length measured in or direction of movement at Iden has the smallest in the middle. 3. Wiirbelstromheiizeinriichtung nach Anspruch i oder 2, mit quer zur Bewegungsrichtung libgenden Spulenseiten, gekennzeichnet durch zusätzliche, regelbare Wicklungen -an den. verlängerten Teilen dies Eisen, körpers. 3. Wiirbelstromheiizeinriichtung according to claim i or 2, with transverse to the direction of movement adjacent coil sides, characterized by additional, adjustable windings -on the. extended parts of this iron, body. Wrbelstromheizeinrichtung nach Anspruch i oder 2 mit in Bewegungsrichtung lieigendien Spulenseiten (der Erregenvicklung, dadurch gekennzeichnet, @daß die Spulenseiten an den verlängerten Teilen des Eisenkörpers ebenfalls verlängert und gegdbenenfallis, regelbar sind. Eddy current heating device according to claim i or 2 with the coil sides lying in the direction of movement (the excitation winding, characterized in that @ that the coil sides on the extended parts of the iron body are also extended and, if necessary, adjustable. 5. Wi..rbelstrowhei2einrd-chtung nach Anspruch 3 oder 4, ,gekennzeichnet durch getrennt und gegebenenfalls mit Strömen verschieidcner Frequenz gespciiste bzw. mit verschiedenen Leiistu@ngen betriebene Teilwicklungen.5. Wi..rbelstrowheating according to claim 3 or 4, characterized by separately and optionally with currents Different frequencies specified or operated with different power levels Partial windings.
DES8358D 1940-01-21 1940-01-21 Eddy current heater Expired DE903977C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES8358D DE903977C (en) 1940-01-21 1940-01-21 Eddy current heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES8358D DE903977C (en) 1940-01-21 1940-01-21 Eddy current heater

Publications (1)

Publication Number Publication Date
DE903977C true DE903977C (en) 1954-02-11

Family

ID=7472754

Family Applications (1)

Application Number Title Priority Date Filing Date
DES8358D Expired DE903977C (en) 1940-01-21 1940-01-21 Eddy current heater

Country Status (1)

Country Link
DE (1) DE903977C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1126046B (en) * 1956-08-17 1962-03-22 United States Steel Corp Preheating inductor for heating the opposing edges, in particular a pipe blank for pipe welding
FR2509562A1 (en) * 1981-07-10 1983-01-14 Cem Comp Electro Mec METHOD AND APPARATUS FOR HOMOGENEOUS HEATING BY TRANSVERSE FLOW ELECTROMAGNETIC INDUCTION OF FLAT, CONDUCTOR AND AMAGNETIC PRODUCTS
FR2840501A1 (en) * 2002-05-29 2003-12-05 Celes Heating coil for metallic strip, comprises turns which present a concave outline for the coil such that the edges of strip being heated receive lower magnetic field than centre to give even heating

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1126046B (en) * 1956-08-17 1962-03-22 United States Steel Corp Preheating inductor for heating the opposing edges, in particular a pipe blank for pipe welding
FR2509562A1 (en) * 1981-07-10 1983-01-14 Cem Comp Electro Mec METHOD AND APPARATUS FOR HOMOGENEOUS HEATING BY TRANSVERSE FLOW ELECTROMAGNETIC INDUCTION OF FLAT, CONDUCTOR AND AMAGNETIC PRODUCTS
EP0070232A1 (en) * 1981-07-10 1983-01-19 Alsthom Method and arrangement for the homogeneous heating with transverse flux electromagnetic induction of flat, conductive and amagnetic products
FR2840501A1 (en) * 2002-05-29 2003-12-05 Celes Heating coil for metallic strip, comprises turns which present a concave outline for the coil such that the edges of strip being heated receive lower magnetic field than centre to give even heating

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