EP1427554B1 - Method and device for sealing a gap between a roller front face and a side seal on a roller-strip-casting machine - Google Patents
Method and device for sealing a gap between a roller front face and a side seal on a roller-strip-casting machine Download PDFInfo
- 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
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- 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
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- 238000005266 casting Methods 0.000 title claims abstract description 26
- 238000007789 sealing Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 16
- 239000002184 metal Substances 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 29
- 230000005291 magnetic effect Effects 0.000 claims description 24
- 229910052742 iron Inorganic materials 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 4
- 230000005294 ferromagnetic effect Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000005684 electric field Effects 0.000 claims 6
- 229910001338 liquidmetal Inorganic materials 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zur Abdichtung eines Spaltes zwischen einer Rollenstirnseite und einer Seitenabdichtung einer Rollen-Bandgiessmaschine nach dem Oberbegriff des Anspruchs 1, sowie ein diesbezügliches Verfahren.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
Es ist bekannt, an einer Zweirollen-Bandgiessmaschine zum Giessen eines Metallbandes, insbesondere eines Stahlbandes, im Stirnseitenbereich der Giessrollen Seitenabdichtungen vorzugsweise in Form von Keramikplatten anzubringen. Zwischen der jeweiligen Rollenstirnseite und der jeweiligen Seitenabdichtung wird ein Dichtspalt gebildet, dessen Kapillarwirkung zur Abdichtung genutzt wird. Kleinste Schwankungen im kapillaren Spalt können jedoch bewirken, dass der niederviskose, flüssige Stahl in den Spalt eindringt, wodurch an der Schmalseite des Stahlbandes Finnen entstehen, die die Gefahr einer unzulässigen Abnützung an den Giessrollen und/oder an den Seitenabdichtungen mit sich bringen und zudem auch Folgeschäden an den Walzen eines nachgeschalteten Walzegerüstes verursachen können. Schäden können auch durch den möglichen Austritt des flüssigen Stahles entstehen. Die Unregelmässigkeiten an der Band-Schmalseite müssen durch Abschneiden der Ränder entfernt werden, was nebst dem Zusatzaufwand die Ausbringung reduziert.It is known to attach side seals, preferably in the form of ceramic plates, to a two-roll strip casting machine for casting a metal strip, in particular a steel strip, in the face region of the casting rolls. Between the respective roller end face and the respective side seal a sealing gap is formed, the capillary action is used for sealing. Smallest fluctuations in the capillary gap, however, can cause the low-viscosity, liquid steel penetrates into the gap, whereby on the narrow side of the steel strip fins arise, which carry the risk of undue wear on the casting rolls and / or on the side seals and also May cause consequential damage to the rolls of a downstream roll stand. Damage can also be caused by the possible leakage of the liquid steel. The irregularities on the narrow band side must be removed by cutting off the edges, which reduces the output in addition to the additional effort.
In der Druckschrift DE-A-44 38 119 ist eine Vorrichtung zur Abdichtung eines Spaltes zwischen einer Seitenwand und Giesswalzen erläutert. Zwischen diesen Seitenwänden und den Giesswalzen ist ein Dichtungsspalt angeordnet, der im flüssigen Bereich des zwischen den Giesswalzen befindlichen Stahls durch die Wirkung eines im Kantenbereich radial zur Oberfläche der Giesswalzen verlaufenden elektrodynamischen Feldes abgedichtet wird. Nachteilig hierbei ist, dass Kühlwasser innerhalb des elektrischen Leiters geführt werden muss, was aufwendig ist.In the document DE-A-44 38 119 a device for sealing a gap between a side wall and casting rolls is explained. Between these side walls and the casting rolls a sealing gap is arranged, which is sealed in the liquid region of the steel located between the casting rolls by the action of a radially extending in the edge region to the surface of the casting rolls electrodynamic field. The disadvantage here is that cooling water must be performed within the electrical conductor, which is expensive.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art sowie eine Vorrichtung zum Durchführen des Verfahrens vorzuschlagen, durch welche die Gefahr des Austrittes vom flüssigen Metall weitgehend eliminiert und die Bildung von Finnen an der Schmalseite des Metallbandes vermieden wird.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.
Diese Aufgabe wird erfindungsgemäss durch eine Vorrichtung mit den Merkmalen des Anspruches 1 sowie durch ein Verfahren nach Anspruch 6 gelöst.This object is achieved by a device with the features of
Dadurch, dass erfindungsgemäss im Bereich des Spaltes ein elektrisches Wirbelfeld erzeugt wird, derart, dass lokal ein Gradientenfeld entsteht und die in der zu vergiessenden Metallschmelze erzeugten Wirbelströme das Eindringen der Schmelze in den Spalt verhindern oder die Schmelze aus dem Spalt zurückdrängen, wird die Kapillarwirkung im Dichtspalt wirksam unterstützt, eine zuverlässige Abdichtung gewährleistet und infolgedessen bessere Qualität der Giessbandkanten sowie eine Reduktion des Verschnittes erreicht. Vom besonderen Vorteil ist dabei der relativ kleine Energieaufwand zur Erzeugung des lokalen Wirbelfeldes.By virtue of the fact that according to the invention an electric vortex field is generated in the region of the gap in such a way that a gradient field arises locally and the eddy currents generated in the molten metal to be poured prevent the melt from penetrating into the gap or force the melt back out of the gap, the capillary action in FIG Sealing gap effectively supported, ensures a reliable seal and as a result better quality of Giessbandkanten and a reduction of the waste achieved. Of particular advantage is the relatively small amount of energy required to generate the local vortex field.
Innerhalb des Eisenkörpers sind Kupferplatten angeordnet, die die Gradientenbildung des elektrischen Wirbelfeldes beeinflussen und das Streufeld in Richtung des Dichtspaltes abdrängen. Die Kupferplatten sind gleichzeitig als Kühlelemente vorgesehen.Within 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.
Bevorzugte Weitergestaltungen des Verfahrens und der Vorrichtung bilden den Gegenstand der abhängigen Ansprüche.Preferred refinements of the method and the device form the subject of the dependent claims.
Die Erfindung wird nachfolgend anhand der Zeichnung näher erläutert. Es zeigen:
- Fig. 1
- schematisch das erfindungsgemässe Abdichtungsprinzip eines Spaltes zwischen einer Rollen-Stirnseite und einer Seitenabdich-tung;
- Fig. 2
- schematisch die Anordnung einer Anzahl von entlang der Rollenstirnseiten im Kokillenbereich einer Bandgiessmaschine angeordneten Magnetelementen zur Erzeugung eines elektrischen Wirbelfeldes;
- Fig. 3
- eines der Magnetelemente nach Fig. 2 im Querschnitt entlang der Linie A in einer ersten Ausführungsform;
- Fig. 4
- eines der Magnetelemente nach Fig. 2 im Querschnitt entlang der Linie A in einer zweiten Ausführungsform; und
- Fig. 5
- eines der Magnetelemente nach Fig. 2 im Querschnitt entlang der Linie A in einer dritten Ausführungsform
- Fig. 1
- schematically the inventive sealing principle of a gap between a roller end face and a Seitenabdich-direction;
- Fig. 2
- schematically the arrangement of a number of arranged along the roller end faces in the mold region of a strip casting magnetic elements for generating an electrical vortex field;
- Fig. 3
- one of the magnetic elements of Figure 2 in cross section along the line A in a first embodiment.
- Fig. 4
- one of the magnetic elements of Figure 2 in cross section along the line A in a second embodiment. and
- Fig. 5
- one of the magnetic elements according to Fig. 2 in cross-section along the line A in a third embodiment
Fig.1 zeigt eine Giessrolle 1 einer Zweirollen-Bandgiessmaschine zum Giessen eines Metallbandes, insbesondere eines Stahlbandes, im Teilschnitt. Diese Giessrolle 1 zusammen mit einer zweiten Rolle 2 ist schematisch auch in Fig. 2 angedeutet. Durch die beiden Giessrollen 1, 2 einerseits und zwei im Stirnseitenbereich der Rollen 1, 2 angeordnete Seitenabdichtungen 3 anderseits wird ein Kokillenraum für das flüssige Metall begrenzt, der in Fig. 2 mit 5 bezeichnet ist. Zwischen den beiden, um horizontale Drehachsen D (Fig. 1) drehbaren Rollen 1, 2 ist ein Durchgangsspalt 4 (Fig. 2) vorhanden, durch welchen das erzeugte Metallband weggeführt wird.1 shows a
Die Rollen 1, 2 bestehen gemäss Fig. 1 jeweils aus einem Basismaterial 5, vorzugsweise Kupfer, und sind mit einer Oberflächenschicht 6 aus einem verschleissfesten Material versehen. Beim Material der Seitenabdichtungen 3 handelt es sich in der Regel um Keramik.According to FIG. 1, the
Wie in Fig. 1 in vergrössertem Massstab dargestellt ist, ist zwischen einer ringförmigen Rollenstirnseite 7 der Rolle 1 und der entsprechenden Seitenabdichtung 3 ein Dichtspalt 10 vorhanden. Damit kein flüssiges Metall in diesen Dichtspalt 10 eindringt (und dadurch Finnen an der Schmalseite des Metallbandes entstehen) oder sogar aus diesem Dichtspalt 10 austritt, wird nicht nur die Kapillarwirkung in diesem Dichtspalt 10 genutzt, sondern zusätzlich erfindungsgemäss ein elektrisches Wirbelfeld erzeugt, derart, dass im Bereich des Dichtspaltes 10 lokal ein Gradientenfeld entsteht, das in Fig. 1 schematisch angedeutet und mit 13 bezeichnet ist, und das eine dem Eindringen des flüssigen Metalls in den Dichtspalt 10 entgegenwirkende Kraft zur Folge hat.As shown in Fig. 1 on an enlarged scale, between a ring-shaped
Zur Erzeugung des lokalen elektrischen Wirbelfeldes sind im Bereich des Kokillenraumes 5 bzw. des jeweiligen Dichtspaltes zwischen jeder Rollenstirnseite 7 und der betreffenden Seitenabdichtung 3 mehrere Magnetelemente 15 nacheinander über den entsprechenden Rollenumfang verteilt angeordnet. Die Magnetelemente 15 sind ortsfest angeordnet und vorzugsweise an den Seitenabdichtungen 3 fixiert, so dass sie beim Rollenwechsel zusammen mit den Seitenabdichtungen 3 mittels eines in der Zeichnung nicht dargestellten Manipulators in einfacher Weise entfernt werden können. Der Aufbau einzelner Magnetelemente 15 ist aus Fig. 3 bis 5 ersichtlich, wobei selbstverständlich ausser diesen drei dargestellten Ausführungsvarianten auch andere Ausgestaltungen möglich wären.To generate the local electric vortex field, a plurality of
Erfindungsgemäss werden mit Vorteil die einzelnen über den jeweiligen Rollenumfang von oben bis nach unten, zum Durchgangsspalt 4 hin aufgeteilten Magnetelemente 15 modular aneinandergereiht. Sie decken hierbei annähernd die gesamte Länge der Seitenabdichtung 3 ab, welche entlang der jeweiligen Giesrolle 1, 2 verläuft.According to the invention, the individual
Beim in Fig. 2 dargestellten Ausführungsbeispiel sind die zwei untersten, in unmittelbarem Bereich des Durchgangsspaltes 4 angeordneten Magnetelemente 15', 15" beider Rollen 1, 2 je zu einem zusammengefasst. Die einzelnen, entsprechend geeignet konstruierten Magnetelemente 15 werden vorzugsweise mit unabhängig regulierbaren Speisungen ausgerüstet, wobei die unabhängige Regulierung je nach Prozessanforderungen und Druckhöhe erfolgt. Vorzugsweise werden die in gleicher Höhe (d.h. im gleichen Abstand vom Durchgangsspalt 4) vor der Stirnseite beider Rollen 1, 2 angeordneten, einander gegenüberliegenden Magnetelemente 15 jeweils gemeinsam angesteuert.2, the two
Wie aus Fig. 3 bis 5 ersichtlich ist, umfasst jedes Magnetelement 15 einen lamellierten, aus im wesentlichen L-förmigen Blechen zusammengesetzten oder nach einem Sinterverfahren hergestellten Eisenkörper 16 sowie eine diesem zugeordnete Spule 17. Mit diesen wird ein magnetisches Wechselfeld im Frequenzbereich von 300 bis 3000 kHz erzeugt. Dieses Wechselfeld verursacht die Bildung von elektrischen Wirbelströmen, die den flüssigen Stahl (oder ein anderes, elektrisch leitendes Metall) durchsetzen und - wie bereits erwähnt - dem Eindringen desselben in den Dichtspalt 10 lokal entgegenwirken. Die über den jeweiligen Walzenumfang von oben bis nach unten aufgeteilten Magnetelemente 15 stossen sozusagen aneinander. In bevorzugter Ausführung weist der jeweilige Eisenkörper 16 in Umfangsrichtung der Rolle 1 bzw. 2 gesehen im Spulenbereich 16s die halbe Länge auf, und die L-förmigen Bleche sind im Spulenbereich überlappt geschichtet, wodurch über die Gesamtlänge in Feldrichtung des Eisenkörpers 16 der gleiche Querschnitt wie innerhalb der Spule 17 entsteht.As is apparent from Figs. 3 to 5, each
Der Eisenkörper 16 ist in seinem oberen Bereich 16o von aussen an der Seitenabdichtung 3 abgestützt und in nicht näher dargestellten Weise fixiert. Ein unterer Bereich 16u ist mit einem vorderen, sich nach oben zum Dichtspalt 10 hin erstreckenden Eisenkörper-Bereich 16v verbunden. Zur Verstärkung der Gradientenbildung des elektrischen Wirbelfeldes im aktiven Luftspalt zwischen den Eisenkörperteilen 16o, 16v bzw. im Dichtspalt 10 ist in der Walzenstirnseite 7 eine Feldführung 20 eingebaut, die durch einen ferromagnetischen, lamellierten oder gesinterten Ring oder durch ein oder mehrere Ringsegmente gebildet ist. Eine obere Fläche 18 des Eisenkörper-Bereichs 16v verläuft parallel zu einer Fläche 19 der Feldführung 20 bzw. der Rollenstirnseite 7, wodurch beispielsweise ein schräg verlaufender Teil 10' des Dichtspaltes 10 gebildet wird.The
Innerhalb des Eisenkörpers 16 sind Kupferplatten 22, 23 angeordnet, die ebenfalls die Gradientenbildung des elektrischen Wirbelfeldes 13 beeinflussen und das Streufeld in Richtung des Dichtspaltes 10 abdrängen. Gegebenenfalls sind zwei Kupferplatten 22, 23 vorhanden. Diese sind gleichzeitig als Kühlelemente vorgesehen.Within the
Wie aus dem Vergleich der Fig. 3 bis 5 hervorgeht, können die Eisenkörper 16, die Seitenabdichtungen 3, die Feldführungen 20 und die Kupferplatten 22, 23 verschiedene Querschnittsformen bzw. Dimensionen aufweisen. Geeignete Feldführungen könnten auch in Seitenabdichtungen 3 eingebaut werden (anstatt an der Rollenstirnseite 7 oder zusätzlich dazu). Fig. 5 zeigt, dass die Gradientenbildung im Dichtspaltbereich durch Änderung des Luftspaltes mittels Anordnug von weiteren, zusätzlichen Schrägflächen 24 bzw. 25 am Eisenkörper 16 zusätzlich optimiert werden kann.As can be seen from the comparison of Figs. 3 to 5, the
Die Erfindung ist mit den oben erläuterten Ausführungsbeispielen ausreichend dargetan. Sie könnte jedoch noch in weiteren Varianten veranschaulicht sein. So könnte zum Beispiel die Anzahl der vorgesehenen Magnetelemente 15 pro Reihe variiert werden, d.h. es könnten im Prinzip auch nur eines oder auch mehr als elf (wie dargestellt) solcher vorgesehen sein.The invention is sufficiently demonstrated with the embodiments explained above. However, it could still be illustrated in further variants. For example, the number of dedicated
Der jeweilige Spalt 10 zwischen der Rollenstirnseite 7 und der Seitenabdichtung 3 kann entweder durch ein gegenseitiges Positionieren oder durch eine beabstandete Anordnung der beiden gebildet sein.The
Claims (12)
- Device for sealing a gap between the end face of a casting roll (1, 2) and a side seal (3) of a roll strip-casting machine, with at least one magnetic element (15), which comprises the coil (17) and an iron body (16) that forms an active air gap, wherein the iron body (16) is installed in such a way that a gradient field is generated in the active air gap in the region of the gap (10) between the end face (7) of the roll and the side seal (3),
characterized in that
for the influence of the gradient field to be generated and for cooling, copper plates (22, 23) are installed inside the iron body (16). - Device in accordance with claim 1,
characterized in that
the magnetic element (15) is mounted on the side seal (3). - Device in accordance with claim 1 or 2,
characterized in that
the gap (10) between the end face (7) of the roll and the side seal (3) is formed either by mutual positioning or by arrangement of the roll some distance from the side seal (3). - Device in accordance with one of the claims 1 to 3,
characterized in that
a number of magnetic elements (15) arranged in a row are installed in the mold region (5) of the roll strip-casting machine along the given end face (7) of the roll, such that opposing magnetic elements (15) located at the same height in front of the end face of the two rolls (1, 2) are controlled together in each case. - Device in accordance with one of the claims 1 to 4,
characterized in that
a number of magnetic elements (15) arranged in a row are installed in the mold region (5) of the roll strip-casting machine along the given end face (7) of the roll, such that each magnetic element (15', 15") located in the immediate vicinity of a through-gap (4) present between the two rolls (1, 2) is combined into a single magnetic element. - Method of sealing a gap between the end face of a casting roll (1, 2) and a side seal (3) of a roll strip-casting machine, in which a rotational electric field is induced in the region of the gap (10) in such a way, that a local gradient field (13) is produced, and the eddy currents generated in the molten metal to be cast prevent the molten metal from penetrating the gap (10) or force the molten metal out of the gap (10),
characterized in that
the arrangement of copper plates (22, 23) inside the magnetic-elements-iron body (16) means for influencing the gradient forming of the rotational electric field, whereby the copper plates (22, 23) are provided as cooling elements at the same time. - Method in accordance with claim 6,
characterized in that
wherein the rotational electric field is induced by an alternating magnetic field with a frequency range between 300 and 3000 kHz. - Method in accordance with claim 6 or 7,
characterized in that
the rotational electric field is induced by at least one magnetic element (15) installed in front of the end face of the roll. - Method in accordance with claim 8,
characterized in that
the rotational electric field is induced by a number of magnetic elements (15) mounted on the side seal (3) and arranged in the mold region (5) of the strip-casting machine along the end face (7) of the given roll. - Method in accordance with claim 9,
characterized in that
the magnetic elements (15) are modularly distributed and are provided with independently controllable power supplies, which can be controlled according to process requirements and pressure level. - Method in accordance with one of the preceding claims,
characterized in that
the gradient formation of the rotational electric field in the region of the gap (10) is optimized by arrangement of field guides (20) in the form of ferromagnetic, laminated, or sintered elements on the end face (7) of the roll and/or on the side seal (3). - Method in accordance with claim 11,
characterized in that
ferromagnetic rings or ring segments built into the end face of the roll are used as field guides (20).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH171401 | 2001-09-18 | ||
| CH01714/01A CH695138A5 (en) | 2001-09-18 | 2001-09-18 | Method and apparatus for sealing a gap between a roller end and one side seal on a roll strip casting machine. |
| PCT/EP2002/010278 WO2003024646A1 (en) | 2001-09-18 | 2002-09-13 | Method and device for sealing a gap between a roller front face and a side seal on a roller-strip-casting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1427554A1 EP1427554A1 (en) | 2004-06-16 |
| EP1427554B1 true EP1427554B1 (en) | 2006-12-13 |
Family
ID=4566008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02779346A Expired - Lifetime EP1427554B1 (en) | 2001-09-18 | 2002-09-13 | Method and device for sealing a gap between a roller front face and a side seal on a roller-strip-casting machine |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US7195054B2 (en) |
| EP (1) | EP1427554B1 (en) |
| CN (1) | CN1272124C (en) |
| AT (1) | ATE347952T1 (en) |
| CH (1) | CH695138A5 (en) |
| DE (1) | DE50208962D1 (en) |
| WO (1) | WO2003024646A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3876964T2 (en) * | 1987-12-17 | 1993-07-01 | Kawasaki Steel Co | COOLING ROLLER FOR THE PRODUCTION OF QUARKED THIN METAL TAPES. |
| 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 (en) | 1994-10-26 | 1998-04-30 | Siemens Ag | Sidewall formation of two-roll belt casting machines |
-
2001
- 2001-09-18 CH CH01714/01A patent/CH695138A5/en not_active IP Right Cessation
-
2002
- 2002-09-13 WO PCT/EP2002/010278 patent/WO2003024646A1/en active IP Right Grant
- 2002-09-13 US US10/489,889 patent/US7195054B2/en not_active Expired - Fee Related
- 2002-09-13 AT AT02779346T patent/ATE347952T1/en active
- 2002-09-13 CN CNB028182588A patent/CN1272124C/en not_active Expired - Fee Related
- 2002-09-13 EP EP02779346A patent/EP1427554B1/en not_active Expired - Lifetime
- 2002-09-13 DE DE50208962T patent/DE50208962D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US7195054B2 (en) | 2007-03-27 |
| US20040251638A1 (en) | 2004-12-16 |
| CN1272124C (en) | 2006-08-30 |
| EP1427554A1 (en) | 2004-06-16 |
| DE50208962D1 (en) | 2007-01-25 |
| CN1555301A (en) | 2004-12-15 |
| WO2003024646A1 (en) | 2003-03-27 |
| CH695138A5 (en) | 2005-12-30 |
| ATE347952T1 (en) | 2007-01-15 |
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