DE903977C - Eddy current heater - Google Patents
Eddy current heaterInfo
- 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
Links
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
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)
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)
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 |
-
1940
- 1940-01-21 DE DES8358D patent/DE903977C/en not_active Expired
Cited By (4)
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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