EP1427554B1 - Procede et dispositif d'etancheification d'un interstice situe entre une face terminale de cylindre et un element d'etancheite lateral dans une machine de coulee en bande a cylindres - Google Patents

Procede et dispositif d'etancheification d'un interstice situe entre une face terminale de cylindre et un element d'etancheite lateral dans une machine de coulee en bande a cylindres Download PDF

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Publication number
EP1427554B1
EP1427554B1 EP02779346A EP02779346A EP1427554B1 EP 1427554 B1 EP1427554 B1 EP 1427554B1 EP 02779346 A EP02779346 A EP 02779346A EP 02779346 A EP02779346 A EP 02779346A EP 1427554 B1 EP1427554 B1 EP 1427554B1
Authority
EP
European Patent Office
Prior art keywords
gap
roll
face
side seal
accordance
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
EP02779346A
Other languages
German (de)
English (en)
Other versions
EP1427554A1 (fr
Inventor
Heinrich Marti
Jacques Barbe
Dominique Salathe
Alfred Koch
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.)
Main Management Inspiration AG
SMS Siemag AG
Original Assignee
Main Management Inspiration AG
SMS Demag 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 Main Management Inspiration AG, SMS Demag AG filed Critical Main Management Inspiration AG
Publication of EP1427554A1 publication Critical patent/EP1427554A1/fr
Application granted granted Critical
Publication of EP1427554B1 publication Critical patent/EP1427554B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/0648—Casting surfaces
    • B22D11/066—Side dams
    • B22D11/0662—Side dams having electromagnetic confining means

Definitions

  • the invention relates to a device for sealing a gap between a roller end face and a side seal of a roll-strip casting machine according to the preamble of claim 1, as well as a related method.
  • the present invention has for its object to provide a method of the type mentioned above and an apparatus for performing the method by which the risk of leakage from the liquid metal largely eliminated and the formation of fins on the narrow side of the metal strip is avoided.
  • the iron body copper plates are arranged, which influence the gradient formation of the electric vortex field and push the stray field in the direction of the sealing gap.
  • the copper plates are also provided as cooling elements.
  • FIG. 1 shows a casting roll 1 of a two-roll strip casting machine for casting a metal strip, in particular a steel strip, in partial section.
  • This casting roll 1 together with a second roll 2 is schematically indicated in Fig. 2.
  • a mold space for the liquid metal is limited, which is designated in Fig. 2 with 5.
  • the rollers 1, 2 each consist of a base material 5, preferably copper, and are provided with a surface layer 6 of a wear-resistant material.
  • the material of the side seals 3 is usually ceramic.
  • a sealing gap 10 is present between a ring-shaped roller end face 7 of the roller 1 and the corresponding side seal 3. So that no liquid metal penetrates into this sealing gap 10 (and thereby fins on the narrow side of the metal strip arise) or even exits from this sealing gap 10, not only the capillary action is used in this sealing gap 10, but additionally generates an electric vortex field according to the invention, such that locally a gradient field arises in the region of the sealing gap 10, which is indicated schematically in FIG. 1 and designated by 13, and which has a force counteracting the penetration of the liquid metal into the sealing gap 10 force.
  • a plurality of magnetic elements 15 are distributed successively over the corresponding roller circumference in the region of the mold space 5 or of the respective sealing gap between each roller end face 7 and the relevant side seal 3.
  • the magnetic elements 15 are arranged stationary and preferably fixed to the side seals 3, so that they together with the side seals when changing roles 3 can be removed by means of a manipulator, not shown in the drawing in a simple manner.
  • the structure of individual magnetic elements 15 can be seen from FIGS. 3 to 5, wherein, of course, other configurations would be possible in addition to these three illustrated embodiments.
  • the individual magnetic elements 15, which are distributed over the respective roll circumference from top to bottom, to the passage gap 4, are advantageously lined up in a modular manner. They cover approximately the entire length of the side seal 3, which runs along the respective casting roll 1, 2.
  • the two lowermost magnet elements 15 ', 15 "of both rollers 1, 2 arranged in the immediate region of the passage gap 4 are each combined into one and the same, appropriately designed magnetic elements 15 are preferably equipped with independently adjustable feeds
  • the independent regulation takes place depending on the process requirements and the pressure level
  • the opposing magnet elements 15, which are arranged at the same height (ie, at the same distance from the passage gap 4) in front of the front side of both rollers 1, 2, are each actuated jointly.
  • each magnetic element 15 comprises a laminated, composed of substantially L-shaped sheets or produced by a sintering process iron body 16 and a coil associated therewith 17. With these an alternating magnetic field in the frequency range of 300 to 3000 kHz generated. This alternating field causes the formation of electrical eddy currents, which enforce the liquid steel (or another, electrically conductive metal) and - as already mentioned - counteract the penetration of the same into the sealing gap 10 locally. The over the respective roll circumference from top to bottom split magnetic elements 15 push so to speak together.
  • the respective iron bodies 16 seen in the circumferential direction of the roller 1 and 2 in the coil region 16 s half the length, and the L-shaped sheets are overlapped in the coil area, whereby over the entire length in the field direction of the iron body 16 of the same cross-section as formed within the coil 17 ,
  • the iron body 16 is supported in its upper region 16 o from the outside to the side seal 3 and fixed in a manner not shown.
  • a lower portion 16u is connected to a front iron body portion 16v extending upward toward the seal gap 10.
  • a field guide 20 is incorporated in the roll end face 7, which is formed by a ferromagnetic, laminated or sintered ring or by one or more ring segments.
  • An upper surface 18 of the iron body portion 16v is parallel to a surface 19 of the field guide 20 and the roller end face 7, whereby, for example, a sloping part 10 'of the sealing gap 10 is formed.
  • copper plates 22, 23 are arranged, which also influence the gradient formation of the electric vortex field 13 and push the stray field in the direction of the sealing gap 10.
  • two copper plates 22, 23 are present. These are also provided as cooling elements.
  • FIG. 5 shows that the gradient formation in the sealing gap region can additionally be optimized by altering the air gap by means of an arrangement of additional, additional inclined surfaces 24 and 25 on the iron body 16.
  • the invention is sufficiently demonstrated with the embodiments explained above. However, it could still be illustrated in further variants.
  • the number of dedicated magnetic elements 15 per row could be varied, i. in principle, only one or even more than eleven (as shown) of such could be provided.
  • the respective gap 10 between the roller end face 7 and the side seal 3 can be formed either by a mutual positioning or by a spaced arrangement of the two.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Basic Packing Technique (AREA)

Claims (12)

  1. Dispositif pour étanchéifier une fente ménagée entre le côté frontal d'un rouleau de coulée (1, 2) et une garniture d'étanchéité latérale (3) d'une machine de coulée en bande à rouleaux, ledit dispositif comportant au moins un élément magnétique (15) qui comporte une bobine (17) ainsi qu'un corps en fer (16) formant un entrefer actif, le corps en fer (16) étant disposé de sorte qu'un champ de gradient soit généré dans l'entrefer actif, dans la région de la fente (10), entre le côté frontal (7) des rouleaux et la garniture d'étanchéité latérale (3),
    caractérisé en ce que
    des plaques de cuivre (22, 23) sont disposées à l'intérieur du corps en fer (16) pour influer sur le champ de gradient à générer et produire un refroidissement.
  2. Dispositif selon la revendication 1, caractérisé en ce que l'élément magnétique (15) est monté sur la garniture d'étanchéité latérale (3).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que la fente (10) est ménagée entre le côté frontal (7) des rouleaux et la garniture d'étanchéité latérale (3) soit en effectuant un positionnement mutuel soit en disposant le rouleau à distance par rapport à la garniture d'étanchéité latérale (3).
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce qu'un certain nombre d'éléments magnétiques (15), placés en série, sont situés dans la région de la lingotière (5) de la machine de coulée en bande à rouleaux le long du côté frontal respectif (7) des rouleaux, les éléments magnétiques (15) opposés l'un à l'autre et placés à la même hauteur en avant du côté frontal des deux rouleaux (1, 2) pouvant être commandés en commun.
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce qu'un certain nombre d'éléments magnétiques (15), disposés en série, sont situés dans la région de la lingotière (5) de la machine de coulée en bande à rouleaux le long du côté frontal respectif (7) des rouleaux, et les éléments magnétiques (15', 15") qui sont placés au voisinage immédiat d'une fente de passage (4) ménagée entre les deux rouleaux (1, 2) sont rassemblés en un seul élément magnétique.
  6. Procédé pour étanchéifier une fente (10) ménagée entre le côté frontal d'un rouleau de coulée (1, 2) et une garniture d'étanchéité latérale (3) d'une machine de coulée en bande à rouleaux, dans lequel un champ électrique tournant est généré dans la région de la fente (10) de façon à produire localement un champ de gradient (13) et de façon à ce que les courants de Foucault générés dans la matière métallique en fusion à couler empêchent la matière en fusion de pénétrer dans la fente (10) ou refoulent la matière en fusion de la fente (10),
    caractérisé en ce que l'on influe sur la formation d'un gradient de champ électrique tournant en plaçant des plaques de cuivre (22, 23) à l'intérieur d'un corps en fer (16) d'éléments magnétiques, les plaques de cuivre (22, 23) servant en même temps d'éléments de refroidissement.
  7. Procédé selon la revendication 6, caractérisé en ce que le champ électrique tournant est généré par un champ magnétique alternatif dont la plage de fréquences va de 300 Hz à 3000 kHz.
  8. Procédé selon la revendication 6 ou 7, caractérisé en ce que le champ électrique tournant est généré par au moins un élément magnétique (15) placé en avant du côté frontal des rouleaux.
  9. Procédé selon la revendication 8, caractérisé en ce que le champ électrique tournant est généré par un certain nombre d'éléments magnétiques (15) montés sur la garniture d'étanchéité latérale (3) et placés dans la région de la lingotière (5) de la machine de coulée en bande le long du côté frontal respectif (7) des rouleaux.
  10. Procédé selon la revendication 9, caractérisé en ce que les éléments magnétiques (15) sont répartis de façon modulaire et sont dotés d'alimentations pouvant être régulées indépendamment, la régulation étant effectuée en fonction des exigences de traitement et du niveau de pression.
  11. Procédé selon l'une des revendications précédentes, caractérisé en ce que la formation du gradient du champ électrique tournant au niveau de la fente (10) est optimisée en plaçant des guides de champ (20) se présentant sous la forme d'éléments ferromagnétiques, lamellées ou frittées sur le côté frontal (7) des rouleaux et/ou sur la garniture d'étanchéité latérale (3).
  12. Procédé selon la revendication 11, caractérisé en ce que l'on utilise comme guides de champ (20) des bagues ou des segments de bague ferromagnétiques incorporés dans le côté frontal des rouleaux.
EP02779346A 2001-09-18 2002-09-13 Procede et dispositif d'etancheification d'un interstice situe entre une face terminale de cylindre et un element d'etancheite lateral dans une machine de coulee en bande a cylindres Expired - Lifetime EP1427554B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH171401 2001-09-18
CH01714/01A CH695138A5 (de) 2001-09-18 2001-09-18 Verfahren und Vorrichtung zur Abdichtung eines Spaltes zwischen einer Rollenstirnseite und einer Seitenabdichtung an einer Rollen- Bandgiessmaschine.
PCT/EP2002/010278 WO2003024646A1 (fr) 2001-09-18 2002-09-13 Procede et dispositif d'etancheification d'un interstice situe entre une face terminale de cylindre et un element d'etancheite lateral dans une machine de coulee en bande a cylindres

Publications (2)

Publication Number Publication Date
EP1427554A1 EP1427554A1 (fr) 2004-06-16
EP1427554B1 true EP1427554B1 (fr) 2006-12-13

Family

ID=4566008

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EP02779346A Expired - Lifetime EP1427554B1 (fr) 2001-09-18 2002-09-13 Procede et dispositif d'etancheification d'un interstice situe entre une face terminale de cylindre et un element d'etancheite lateral dans une machine de coulee en bande a cylindres

Country Status (7)

Country Link
US (1) US7195054B2 (fr)
EP (1) EP1427554B1 (fr)
CN (1) CN1272124C (fr)
AT (1) ATE347952T1 (fr)
CH (1) CH695138A5 (fr)
DE (1) DE50208962D1 (fr)
WO (1) WO2003024646A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3876964T2 (de) * 1987-12-17 1993-07-01 Kawasaki Steel Co Kuehlwalze fuer die herstellung abgeschreckter duenner metallbaender.
US4974661A (en) * 1988-06-17 1990-12-04 Arch Development Corp. Sidewall containment of liquid metal with vertical alternating magnetic fields
US4936374A (en) * 1988-11-17 1990-06-26 The United States Of America As Represented By The United States Department Of Energy Sidewall containment of liquid metal with horizontal alternating magnetic fields
DE4438119C2 (de) 1994-10-26 1998-04-30 Siemens Ag Seitenwandausbildung von Zweiwalzen-Bandgießmaschinen

Also Published As

Publication number Publication date
DE50208962D1 (de) 2007-01-25
EP1427554A1 (fr) 2004-06-16
CN1555301A (zh) 2004-12-15
WO2003024646A1 (fr) 2003-03-27
ATE347952T1 (de) 2007-01-15
CH695138A5 (de) 2005-12-30
CN1272124C (zh) 2006-08-30
US7195054B2 (en) 2007-03-27
US20040251638A1 (en) 2004-12-16

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