FR2590434A1 - Inductor and device for inductive reheating of edges of a metallurgical product - Google Patents
Inductor and device for inductive reheating of edges of a metallurgical product Download PDFInfo
- Publication number
- FR2590434A1 FR2590434A1 FR8517193A FR8517193A FR2590434A1 FR 2590434 A1 FR2590434 A1 FR 2590434A1 FR 8517193 A FR8517193 A FR 8517193A FR 8517193 A FR8517193 A FR 8517193A FR 2590434 A1 FR2590434 A1 FR 2590434A1
- Authority
- FR
- France
- Prior art keywords
- poles
- inductors
- axis
- product
- inductor
- 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.)
- Pending
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
- H05B6/102—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces the metal pieces being rotated while induction heated
-
- 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
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Induction Heating (AREA)
Abstract
Description
INDUCTEUR ET DISPOSITIF DE RECHAUFFAGE INDUCTIF DE RIVES
D'UN PRODUIT METALLURGIQUE. INDUCTOR AND DEVICE FOR INDUCTIVE SHORE HEATING
OF A METALLURGICAL PRODUCT.
L'invention concerne le réchauffage inductif des rives d'un prcduit métallurgique. The invention relates to the inductive heating of the edges of a metallurgical product.
Pour une installation de laminage de brames couplée directement à une installation de coulée continue, il s'avère souhaitable de réchauffer les bords des brames, afin d'obtenir un produit thermiquement homogène à l'entrée du train dégrossisseur. For a slab rolling installation directly coupled to a continuous casting installation, it is desirable to heat the edges of the slabs, in order to obtain a thermally homogeneous product at the entry of the roughing train.
En effet, le déficit thermique ou écart de température moyenne dans l'épaisseur d'une brame, entre le centre et les rives peut o être de l'ordre de 120 C en sortie de coulée continue, en raison du refroidissement préférentiel des- rives (effet d'ailette).Indeed, the thermal deficit or average temperature difference in the thickness of a slab, between the center and the banks can be of the order of 120 C at the outlet of continuous casting, due to the preferential cooling of the banks (fin effect).
Il a déjà été proposé, pour effacer les hétérogénéités des rives d'un produit métallurgique, un réchauffage par induction, localisé aux rives, à l'aide d'inducteurs à culasse magnétique en forme de U disposés au dessus et au dessous du produit, celui-ci défilant à l'horizontale dans l'entrefer constitué entre deux inducteurs superposés dont les pôles magnétiques contraires se font face. It has already been proposed, to erase the heterogeneities of the edges of a metallurgical product, an induction heating, located on the edges, using inductors with magnetic U-shaped yoke arranged above and below the product, the latter parading horizontally in the air gap formed between two superimposed inductors whose opposite magnetic poles face each other.
Par ailleurs, l'inventeur a déjà proposé (cf. demande de brevet franchais No. 85 08684 du 7 juin 1985) une amélioration du dispositif précédent, selon laquelle on utilise des inducteurs en
C enfourchant latéralement le produit. Cependant, les inducteurs précités sont plus spécialement destinés au réchauffage de produits relativement minces (par exemple de 30 à 50 mm d'épaisseur). Le réchauffage des rives de produits plus épais (par exemple 250 ma d'épaisseur) par les inducteurs connus risque d'être insuffisant et de ne pas pénétrer à coeur.Furthermore, the inventor has already proposed (cf. French patent application No. 85 08684 of June 7, 1985) an improvement on the previous device, according to which inductors are used in
C laterally straddling the product. However, the above-mentioned inductors are more specifically intended for reheating relatively thin products (for example from 30 to 50 mm thick). Reheating the edges of thicker products (for example 250 m thick) by known inductors risks being insufficient and not penetrating to the core.
Le but de l'invention est de proposer un nouveau type d'inducteur plus performant que les inducteurs connus, pour le réchauffage de rives des produits métallurgiques plus épais, tels que les brames de coulée continue. The object of the invention is to propose a new type of inductor more efficient than known inductors, for reheating the edges of thicker metallurgical products, such as continuous casting slabs.
L'inducteur conforme à l'invention se caractérise en ce qu'il est constitué d'une culasse en forme d'E à pôles bobines, ayant deux poles extrêmes alignés sur un premier axe et se faisant face à distance de manière à définir entre eux un entrefer, et un pôle médian orienté selon un second axe perpendiculaire au premier axe et disposé en retrait par rapport aux deux poles extrêmes afin de ne pas empiéter ledit entrefer, les bobinages des trois poles étant agencés de manière que, en fonctionnement, la somme des flux entrant ou sortant tous deux par les pâles extrêmes soit égale au flux sortant ou entrant par le pôle médian. The inductor according to the invention is characterized in that it consists of an E-shaped cylinder head with coil poles, having two extreme poles aligned on a first axis and facing each other at a distance so as to define between them an air gap, and a median pole oriented along a second axis perpendicular to the first axis and set back relative to the two extreme poles so as not to encroach on said air gap, the windings of the three poles being arranged so that, in operation, the sum of the inflows or outflows both by the extreme blades is equal to the outflows or inflows by the middle pole.
Une telle constitution réduit au minimum l'entrefer, correspondant à la distance parcourue hors culasse par le champ magnétique, en supposant que celui-ci suit le chemin privélégie que lui impose la culasse. D'autre part, cette disposition permet une meilleure concentration du flux dans le produit. Dans le dispositif de réchauffage conforme à l'invention, les inducteurs sont implantés de manière que le trajet des rives coupe l'entrefer desdits inducteurs, les pôles extremes étant orientés dans le sens de l'épaisseur du produit. Such a constitution minimizes the air gap, corresponding to the distance traveled outside the cylinder head by the magnetic field, assuming that the latter follows the preferred path imposed by the cylinder head. On the other hand, this arrangement allows a better concentration of the flow in the product. In the heating device according to the invention, the inductors are installed so that the path of the edges intersects the air gap of said inductors, the extreme poles being oriented in the direction of the thickness of the product.
D'autres caractéristiques et avantages ressortiront de la description suivante d'un mode préféré de réalisation. Il sera fait référence aux dessins annexés dans lesquels :
- la figure 1 est une vue schématique transversale d'une installation de réchauffage inductif des rives d'une brame montrant deux inducteurs en E conformes à l'invention.Other characteristics and advantages will emerge from the following description of a preferred embodiment. Reference will be made to the appended drawings in which:
- Figure 1 is a schematic transverse view of an inductive heating installation of the edges of a slab showing two inductors in E according to the invention.
- la Figure 2 est un schéma de branchement des bobines d'un inducteur conforme à l'invention. - Figure 2 is a connection diagram of the coils of an inductor according to the invention.
Sur la figure 1, on voit que les rives 1 de la brame 2, laquelle défile dans le sens perpendiculaire au plan du dessin, passent dans l'entrefer des inducteurs 3. In FIG. 1, it can be seen that the edges 1 of the slab 2, which scrolls in the direction perpendicular to the plane of the drawing, pass through the air gap of the inductors 3.
Ceux-ci comportent une culasse magnétique 4 qui, en position de chauffage, a la forme de la lettre majuscule E, en ce sens qu'elle définit trois pôles 5, 6, 7 convergeant vers les rives 1 de la brame et dotés respectivement de bobines 6, 9, 10. These comprise a magnetic yoke 4 which, in the heating position, has the shape of the capital letter E, in the sense that it defines three poles 5, 6, 7 converging towards the banks 1 of the slab and respectively provided with coils 6, 9, 10.
Le pôle médian 5 est orienté dans le sens de la largeur de la brame 2 (axe 13), tandis que les pôles extremes 6 et 7 sont orientés dans le sens de son épaisseur (axe 14) et se font face à distance de manière a définir entre eux, à vide (c'est-à-dire en l'absence de produit à chauffer) un entrefer dans lequel défilera une rive du produit à chauffer. A cet effet, l'extension du pole médian 5 depuis son implantation sur la branche principale de la culasse est telle que ce pôle reste en retrait par rapport aux pôles extrêmes 6 et 7 afin de ne pas empiéter sur l'entrefer.The middle pole 5 is oriented in the width direction of the slab 2 (axis 13), while the extreme poles 6 and 7 are oriented in the direction of its thickness (axis 14) and face each other at a distance so define between them, empty (that is to say in the absence of product to be heated) an air gap in which a bank of the product to be heated will pass. To this end, the extension of the middle pole 5 from its location on the main branch of the cylinder head is such that this pole remains set back relative to the extreme poles 6 and 7 so as not to encroach on the air gap.
Les bobines e, 9, 10 sont branchées conformément au schéma de la figure 2 de sorte que l'intensité du courant circulant dans la bobine a du pOle médian soit égale à la somme des intensités circulant dans les bobines 9 et 10 des piles opposés, lesquelles intensites sont en principe égales. Dans ces conditions, si les bobines comportent un même nombre de spires, et si le sens de chaque enroulement est approprié, le flux rentrant du pale médian 5 est égal à la somme des flux sortants des pôles 6 et 7, et les lignes d'induction passent au travers du bord de la brame comme représenté par les flèches 11, en y produisant le réchauffement local désiré. La fréquence d'alimentation des inducteurs est voisine de 300 HZ. The coils e, 9, 10 are connected in accordance with the diagram in FIG. 2 so that the intensity of the current flowing in the coil a of the middle pole is equal to the sum of the intensities flowing in the coils 9 and 10 of the opposite cells, which intensities are in principle equal. Under these conditions, if the coils have the same number of turns, and if the direction of each winding is appropriate, the incoming flow from the middle blade 5 is equal to the sum of the outgoing flows from the poles 6 and 7, and the lines of induction pass through the edge of the slab as shown by the arrows 11, producing the desired local heating. The frequency of supply of the inductors is close to 300 HZ.
Les inducteurs 3 sont supportés par des châssis non représentés permettant de les déplacer transversalement (dans le sens des flèches 12 et en sens inverse) de manière à pouvoir adapter la position des inducteurs à différentes largeurs de produit. The inductors 3 are supported by frames not shown allowing them to be moved transversely (in the direction of the arrows 12 and in the opposite direction) so as to be able to adapt the position of the inductors to different widths of product.
Claims (3)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8517193A FR2590434A1 (en) | 1985-11-20 | 1985-11-20 | Inductor and device for inductive reheating of edges of a metallurgical product |
ES198686440097T ES2029997T3 (en) | 1985-11-20 | 1986-11-06 | INDUCTOR AND INDUCTIVE HEATING DEVICE OF EDGES OF A METALLURGICAL PRODUCT. |
AT86440097T ATE73599T1 (en) | 1985-11-20 | 1986-11-06 | INDUCTOR AND INDUCTION HEATING PLANT OF THE EDGES OF A METALLURGICAL PRODUCT. |
EP86440097A EP0266470B1 (en) | 1985-11-20 | 1986-11-06 | Inductor and induction heating device for the edges of a metallurgical product |
DE8686440097T DE3684323D1 (en) | 1985-11-20 | 1986-11-06 | INDUCTOR AND INDUCTION HEATING SYSTEM OF THE EDGES OF A METALLURGICAL PRODUCT. |
JP61277783A JPS6324584A (en) | 1985-11-20 | 1986-11-20 | Inductor and apparatus for heating edge of metallurgy product by electromagnetic induction |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8517193A FR2590434A1 (en) | 1985-11-20 | 1985-11-20 | Inductor and device for inductive reheating of edges of a metallurgical product |
EP86440097A EP0266470B1 (en) | 1985-11-20 | 1986-11-06 | Inductor and induction heating device for the edges of a metallurgical product |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2590434A1 true FR2590434A1 (en) | 1987-05-22 |
Family
ID=9325012
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8517193A Pending FR2590434A1 (en) | 1985-11-20 | 1985-11-20 | Inductor and device for inductive reheating of edges of a metallurgical product |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0266470B1 (en) |
JP (1) | JPS6324584A (en) |
AT (1) | ATE73599T1 (en) |
DE (1) | DE3684323D1 (en) |
ES (1) | ES2029997T3 (en) |
FR (1) | FR2590434A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0266470A1 (en) * | 1985-11-20 | 1988-05-11 | Rotelec | Inductor and induction heating device for the edges of a metallurgical product |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2661849B1 (en) * | 1990-05-10 | 1995-03-17 | Siderurgie Fse Inst Rech | METHOD AND DEVICES FOR INDUCTION HEATING OF A METALLURGICAL PRODUCT IN AN ELONGATE SHAPE. |
US5841023A (en) * | 1993-08-31 | 1998-11-24 | Boehringer Mannheim Corporation | Magnet for medical instrument |
BRPI0710693B1 (en) | 2006-04-24 | 2018-07-24 | Inductoheat, Inc. | METHOD OF ELECTRICAL THERMAL TREATMENT |
DE102007051144B4 (en) * | 2007-07-26 | 2010-06-02 | Zenergy Power Gmbh | Induction heater and method for adjusting the width of the wells of such induction heater |
FR3035766B1 (en) * | 2015-04-29 | 2019-10-11 | Sncf Mobilites | INDUCTION HEATING DEVICE FOR METALLIC PARTS AND RAILWAY VEHICLE COMPRISING SUCH A DEVICE |
DE102015112293A1 (en) * | 2015-07-28 | 2017-02-02 | Hydro Aluminium Rolled Products Gmbh | Method and apparatus for the adaption of temperature-adapting metal bands |
IT201700020203A1 (en) * | 2017-02-22 | 2018-08-22 | Rotelec Sa | HEATING SYSTEM FOR METAL PRODUCTS |
KR102081069B1 (en) * | 2018-05-24 | 2020-02-25 | 주식회사 다원시스 | Induction Heating Apparatus |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2010622A (en) * | 1933-03-20 | 1935-08-06 | Ray A Brown | Housing heater |
US3663782A (en) * | 1971-06-10 | 1972-05-16 | United States Steel Corp | Laminated iron core induction corner-heating unit |
FR2118330A5 (en) * | 1970-12-17 | 1972-07-28 | Westinghouse Electric Corp |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2583249B1 (en) * | 1985-06-07 | 1989-04-28 | Siderurgie Fse Inst Rech | DEVICE FOR INDUCTIVELY HEATING THE RIVES OF A METALLURGICAL PRODUCT AND VARIABLE GAP INDUCTOR |
FR2590434A1 (en) * | 1985-11-20 | 1987-05-22 | Siderurgie Fse Inst Rech | Inductor and device for inductive reheating of edges of a metallurgical product |
-
1985
- 1985-11-20 FR FR8517193A patent/FR2590434A1/en active Pending
-
1986
- 1986-11-06 EP EP86440097A patent/EP0266470B1/en not_active Expired - Lifetime
- 1986-11-06 DE DE8686440097T patent/DE3684323D1/en not_active Expired - Fee Related
- 1986-11-06 AT AT86440097T patent/ATE73599T1/en not_active IP Right Cessation
- 1986-11-06 ES ES198686440097T patent/ES2029997T3/en not_active Expired - Lifetime
- 1986-11-20 JP JP61277783A patent/JPS6324584A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2010622A (en) * | 1933-03-20 | 1935-08-06 | Ray A Brown | Housing heater |
FR2118330A5 (en) * | 1970-12-17 | 1972-07-28 | Westinghouse Electric Corp | |
US3663782A (en) * | 1971-06-10 | 1972-05-16 | United States Steel Corp | Laminated iron core induction corner-heating unit |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0266470A1 (en) * | 1985-11-20 | 1988-05-11 | Rotelec | Inductor and induction heating device for the edges of a metallurgical product |
Also Published As
Publication number | Publication date |
---|---|
ES2029997T3 (en) | 1992-10-16 |
EP0266470B1 (en) | 1992-03-11 |
EP0266470A1 (en) | 1988-05-11 |
ATE73599T1 (en) | 1992-03-15 |
JPS6324584A (en) | 1988-02-01 |
DE3684323D1 (en) | 1992-04-16 |
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