EP0979154B1 - Casting roll - Google Patents
Casting roll Download PDFInfo
- Publication number
- EP0979154B1 EP0979154B1 EP98924242A EP98924242A EP0979154B1 EP 0979154 B1 EP0979154 B1 EP 0979154B1 EP 98924242 A EP98924242 A EP 98924242A EP 98924242 A EP98924242 A EP 98924242A EP 0979154 B1 EP0979154 B1 EP 0979154B1
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- EP
- European Patent Office
- Prior art keywords
- roll
- casting roll
- guide element
- casting
- coolant
- 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.)
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- 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
-
- 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
- B22D11/068—Accessories therefor for cooling the cast product during its passage through the mould surfaces
- B22D11/0682—Accessories therefor for cooling the cast product during its passage through the mould surfaces by cooling the casting wheel
Definitions
- the invention relates to a casting roll for the continuous casting of a metal strip, preferably a steel strip in a thickness range from 1 mm to 12 mm, Consisting of a roller core and one wound on the roller core Roller jacket made of thermally conductive material, being between the roller core and circumferential cooling slots are arranged, which with substantially radial supply and discharge lines for the coolant and with a means for deflecting the Coolant are connected.
- a casting roll of this type is from IT-PS 1 255 817 and from DE-A 196 12 202, Fig. 1 and 1a, and the associated description known. It consists of a roller core and a the roll core shrunk onto the inside of the roll running cooling slots are incorporated, but do not circulate continuously. Coolant is supplied centrally through the casting roll neck and via radial Arranged collecting channels supplied to the circular cooling slots and from dissipated in an analogous manner.
- the roller jacket has a collecting channels and the cooling slots Thickness change due to the cooling slots not running all the way around is necessary to ensure the separation of incoming and outgoing coolant and which in operation lead to different radial and axial deformations of the Roll cover at this point leads, both for the production process itself and are disadvantageous for the product produced.
- it comes through Deformations to thickness deviations on the product produced on the other hand found that it was caused by the alternating heating following the roll rotation and cooling the roll shell to slowly twist the Roll shell comes to the roll core, which also by installing a positive locking against rotation could not be remedied satisfactorily. This twist can to a large extent lead to a short-circuit flow between supply and discharge, as it must be avoided.
- the invention aims to avoid these disadvantages and difficulties and provides the task of creating a casting roll of the type described in the opening paragraph minimized coolant consumption and clearly defined flow conditions enables uniform heat dissipation from the roll shell and the thermal conditional migration efforts of the roll shell towards the roll core allows.
- Another object of the invention is a constructive and manufacturing technology simple casting roller with rotationally symmetrical roller shell to propose whose thermal expansion is free of mechanical Disabilities are possible.
- each cooling slot is a guide element assigned.
- a preferred embodiment, which is easy to assemble is characterized in that several adjacent cooling slots a common guide element is assigned.
- the guide element is comb-like, with its individual teeth in their width and depth essentially with the width and depth of the cooling slots to match.
- the guide element is made up of plate-shaped individual elements which alternately form teeth and gaps and with one the plate-shaped Connecting element penetrating individual elements, preferably a bolt are held together.
- a defined gap is set between the roll shell and the guide element, in particular between the cooling slot base and the end face of the guide element.
- the defined gap enables one desired leakage flow between the inflow area which is predetermined in its extent and outflow area, as a result of the axially symmetrical operating behavior of the Roll jacket is achieved.
- Particularly favorable conditions are achieved that the gap as a function of the depth-variable guide element length is dimensioned that the average coolant flow rate in the gap of Coolant flow rate in the other areas of the cooling slots equivalent.
- the gap between the guide element and the roller jacket thus becomes so dimensioned that achieved similar cooling conditions in the area of the guide elements as everywhere else on the roller jacket.
- For a gap length of 50 mm result from calculations depending on the pressure difference and mean Coolant flow rate (4 to 15 m / s) gap thicknesses of approx. 0.3 to 0.8 mm.
- a fluidically favorable deflection of the coolant from the radial Supply in the circular cooling slots and back is achieved in that the teeth of the guide element in the radial direction towards the cooling slot base are extended in an arc.
- the teeth of the guide element are radial Direction preferably tapered arc-shaped. Since such Cooling slot base is a very narrow face of the guide element, that is Risk of clogging of the gap between these two components is minimized or insignificant and the risk that by not axially symmetrical thermal Relative asymmetries of deformation arise, kept extremely small.
- the thermal conditions in the Roll jacket additionally evened out that individual guide elements or Groups of several next to each other in the direction of the longitudinal axis of the casting roll arranged guide elements with respect to the longitudinal axis of the casting roll by an angle are staggered.
- the result is a simply structured casting roller in that all guide elements in a line parallel to the longitudinal axis of the casting roll are aligned.
- the guide element is equipped with a Plug connection connected to the roller core.
- the guide element is preferably by a plug connection with a partition between the supply line and the Drainage for the coolant connected.
- the partition is part of the roll core.
- the plug connection is essentially from one to the other Casting roll longitudinal axis parallel groove formed.
- the guide element preferably consists of a material of the same or less Thermal conductivity like the roller jacket to avoid assembly problems and jamming in the Avoid cooling slot safely.
- a two-roll caster for the continuous casting of a steel strip in one Thickness range from 1 mm to 12 mm consists of two in opposite directions in the direction of the arrow rotating, driven casting rolls 1 with parallel to each other Casting roll longitudinal axes 2.
- the casting room 3, in the melt continuously is introduced, is from the two casting rolls 1 and on the end faces adjustable sidewalls 4 formed.
- the continuously generated is down Steel strip 5 pulled off.
- the roll neck 6 coolant in the direction of arrow 7 fed and after passing through and cooling the casting roll surface from the inside in Direction of arrow 8 discharged again.
- a two-roll caster of this type is for example also shown in IT-PS 1 255 817 in FIG. 1.
- Fig. 2 shows an example of the internal structure of a first embodiment of the Casting roll 1, which is formed by a roll core 9 and a roll shell 10.
- the roller core 9 consists of a steel drum 11, which is not with the here shown roll neck and various side walls and reinforcing ribs as Welded construction is made.
- the steel drum 11 contains passage openings, form the supply lines 12 and discharge lines 13 for the coolant, which by the Roll pin 6 is fed in and out.
- the details of the coolant circuit between roll neck 6 and the feed line 12 and the discharge line 13 are not shown, but can be analogous to that shown in IT-PS 1 255 817 Embodiment can be designed.
- the roll shell made, for example, of copper or a copper alloy 10 has circular, uninterrupted, circumferential cooling slots 14 on its inside to which the coolant is supplied in the direction of the arrow via the feed line 12 and after Flow through the cooling slot 14 in the direction of the arrow through the discharge line 13 again is derived.
- Several of the circular cooling slots 14 arranged side by side is one extending in the direction of the longitudinal axes 2 of the casting rolls Coolant distribution chamber 15 is assigned to which the supply line 12 is expanded. Is analog the derivative 13 in its transition region from the cooling slots 14 to one Coolant collection chamber 16 expanded. This results in a mechanically simple one Structure of the roll core 9.
- the cooling slots 14 can also be helical in the Roll jacket 10 to be incorporated.
- a guide element 17 for the defined deflection of the coolant and the separation of the coolant flows between supply line 12 and discharge line 13 intended.
- the guide element 17 has a plug connection 18 with the partition 19 connected between lead 12 and lead 13.
- the guide element 17 has a plurality of teeth 20, which protrude from a base 21 and their distance, width and depth on the Distance, the width and depth of the cooling slots 14 are matched.
- Guide element 17 can be constructed from plate-shaped individual elements 26, 27 which alternately form teeth and gaps or base parts and with one die connecting element penetrating plate-shaped individual elements, preferably a bolt 28 are held together.
- the teeth 20 are, as shown in FIG. 2, for improved coolant diversion Cooling slot base 22 extended in an arc shape.
- the base 21 is the plug connection 18 designed accordingly and sliding with the partition 19 on the end face connected.
- the guide element 17 is included in the cooling slots 14 glued to the roll shell 10.
- the adhesive connection is said to be of low strength exhibit.
- FIGS. 4 and 5 show a guide element 17 with a defined gap 23 between the Teeth 20 of the guide element 17 and the walls of the cooling slots 14 in Roller jacket 10.
- the teeth 20 at the front and on the side walls with spacers inserted in blind holes 24 equipped.
- the blind holes are indicated by their center lines 25.
- Cooling slot base 22 shown tapered teeth 20.
- Components correspond to this embodiment of the embodiment according to FIG. 2.
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Abstract
Description
Die Erfindung betrifft eine Gießwalze zum kontinuierlichen Gießen eines Metallbandes, vorzugsweise eines Stahlbandes in einem Dickenbereich von 1 mm bis 12 mm, bestehend aus einem Walzenkern und einem auf dem Walzenkern aufgezogenen Walzenmantel aus wärmeleitfähigem Material, wobei zwischen dem Walzenkern und dem Walzenmantel umlaufende Kühlschlitze angeordnet sind, die mit im wesentlichen radialen Zu- und Ableitungen für das Kühlmittel und mit einem Mittel zur Umlenkung des Kühlmittels verbunden sind.The invention relates to a casting roll for the continuous casting of a metal strip, preferably a steel strip in a thickness range from 1 mm to 12 mm, Consisting of a roller core and one wound on the roller core Roller jacket made of thermally conductive material, being between the roller core and circumferential cooling slots are arranged, which with substantially radial supply and discharge lines for the coolant and with a means for deflecting the Coolant are connected.
Es sind Vorrichtungen bekannt, mit denen Metallbänder mit endabmessungsnahem Querschnittsformat in einem kontinuierlichen Gießverfahren hergestellt werden können. Dies ist möglich, indem Metallschmelze von einem Zwischengefäß kontinuierlich auf eine rotierende Gießwalze in einer gewünschten Schichtstärke aufgebracht und nach deren Durcherstarrung oder Teildurcherstarrung von der Gießwalze wieder abgenommen wird (Einwalzengießverfahren). Die Herstellung von endabmessungsnahen Bändern ist auch möglich, indem die Metallschmelze in den von zwei gegensinnig rotierenden Gießwalzen und von Seitenwänden gebildeten Gießraum eingebracht wird, wobei die Metallschmelze an der gekühlten Gießwalzenoberfläche erstarrt und zwei Strangschalen bildet, die im engsten Querschnitt zwischen den beiden Gießwalzen zu einem Gießstrang verbunden werden, der eine vom Abstand der beiden Gießwalzen zueinander abhängige definierte Dicke aufweist (Zweiwalzengießverfahren).Devices are known with which metal strips with near net dimensions Cross-sectional format can be produced in a continuous casting process. This is possible by continuously melting metal from an intermediate vessel a rotating casting roll is applied in a desired layer thickness and after their solidification or partial solidification by the casting roll again is removed (single-roll casting process). The production of Tapes close to the final dimension are also possible by melting the metal in the two counter-rotating casting rolls and casting space formed by side walls is introduced, the metal melt on the cooled casting roll surface solidifies and forms two strand shells, the narrowest cross-section between the two Casting rollers are connected to form a casting strand, one from the distance between the two Casting rolls has a defined thickness that is dependent on one another (two-roll casting process).
Eine Gießwalze dieser Art, wie sie für das Zweiwalzengießverfahren Anwendung findet, ist aus der IT-PS 1 255 817 und aus der DE-A 196 12 202, Fig.1 und 1a, sowie der zugehörigen Beschreibung bekannt. Sie besteht aus einem Walzenkern und einem auf dem Walzenkern aufgeschrumpften Walzenmantel, in dem innenseitig zirkular verlaufende Kühlschlitze eingearbeitet sind, diese jedoch nicht durchgehend umlaufen. Durch den Gießwalzenzapfen wird zentral Kühlmittel zugeführt und über radial angeordnete Sammelkanäle den zirkular verlaufenden Kühlschlitzen zugeführt und von diesen in analoger Weise wieder abgeführt. An der Übergangsstelle zwischen den Sammelkanälen und den Kühlschlitzen weist der Walzenmantel eine Dickenveränderung auf, die durch die nicht durchgehend umlaufenden Kühlschlitze bedingt ist, um die Trennung von zu- und ablaufendem Kühlmittel zu gewährleisten und die im Betrieb zu unterschiedlichen radialen und axialen Deformationen des Walzenmantels an dieser Stelle führt, die sowohl für den Erzeugungsprozess selbst als auch für das erzeugte Produkt nachteilig sind. Einerseits kommt es durch die Deformationen zu Dickenabweichungen am erzeugten Produkt, andererseits wurde festgestellt, dass es durch das abwechselnde der Walzendrehung folgende Erwärmen und Abkühlen des Walzenmantels zu einer langsam erfolgenden Verdrehung des Walzenmantels gegenüber dem Walzenkern kommt, welchem auch durch Einbau einer formschlüssigen Verdrehsicherung nicht zufriedenstellend abgeholfen werden konnte. Diese Verdrehung kann in einem hohen Ausmass zu einer Kurzschlußströmung zwischen Zu- und Ableitung führen, wie sie unbedingt vermieden werden muss.A casting roll of this type, as used for the two-roll casting process, is from IT-PS 1 255 817 and from DE-A 196 12 202, Fig. 1 and 1a, and the associated description known. It consists of a roller core and a the roll core shrunk onto the inside of the roll running cooling slots are incorporated, but do not circulate continuously. Coolant is supplied centrally through the casting roll neck and via radial Arranged collecting channels supplied to the circular cooling slots and from dissipated in an analogous manner. At the transition point between the The roller jacket has a collecting channels and the cooling slots Thickness change due to the cooling slots not running all the way around is necessary to ensure the separation of incoming and outgoing coolant and which in operation lead to different radial and axial deformations of the Roll cover at this point leads, both for the production process itself and are disadvantageous for the product produced. On the one hand, it comes through Deformations to thickness deviations on the product produced, on the other hand found that it was caused by the alternating heating following the roll rotation and cooling the roll shell to slowly twist the Roll shell comes to the roll core, which also by installing a positive locking against rotation could not be remedied satisfactorily. This twist can to a large extent lead to a short-circuit flow between supply and discharge, as it must be avoided.
Weiters ist aus der DE-OS 196 12 202 bereits eine Lösung bekannt, die diese Nachteile nicht mehr aufweist. Hier wird eine gattungsbildende Gießwalze vorgeschlagen, bei der ein Walzenmantel mit zirkular und ununterbrochen umlaufend in den Walzenmantel eingearbeiteten Kühlschlitzen auf eine Gießtrommel aufgeschrumpft ist. Von den Sammelkanälen ausgehend verteilt sich das Kühlmittel beidseitig in die Kühlschlitze und tritt an der gegenüberliegenden Seite der Gießwalze nach Durchlaufen eines Weges von 180° wieder in Sammelkanäle aus. Ein gravierender Nachteil dieser Lösung besteht in der Verdopplung der für die Kühlung erforderlichen Kühlmittelmenge bei Konstanthaltung der für die gewünschte Kühlwirkung notwendigen Strömungsgeschwindigkeit, die sich durch die Verzweigung der Kühlmittelströme ergibt. Dem Mehrbedarf an Kühlmittel kann zwar durch dessen zweimalige Verwendung entgegengewirkt werden, wie dies auch in der DE-OS 196 12 202 in einer speziellen Ausführungsform angesprochen ist. Diese Möglichkeit bringt jedoch den Nachteil einer komplizierten Walzenkernkonstruktion mit sich. Weiters werden durch diese Kühlmittelumleitungen axiale Zonen gebildet, deren benachbarte Kühlschlitze von Kühlmittel unterschiedlicher Temperatur durchströmt werden, weshalb auch in diesen Übergangsbereichen, bzw. in den unterschiedlichen axialen Zonen die mittlere Gießwalzentemperatur deutlich variiert, insbesondere ergibt sich ein Temperatursprung beim Übergang von einer axialen Zone zur nächsten. Diese Temperaturänderungen belasten zum einen den Walzenkern und den Walzenmantel mechanisch und beeinträchtigen zum anderen das gegossene Metallband, da möglichst gleichmäßige thermische Verhältnisse in axialer Richtung von entscheidender Bedeutung für die Qualität des Bandes sind. Zudem besteht auch die nicht zu unterschätzende Gefahr, dass die Strömungsteilung in die zirkularen Kühlschlitze, beispielsweise durch etwaige Verschmutzungen, nicht hinreichend gleich erfolgt. Furthermore, a solution is already known from DE-OS 196 12 202, which has these disadvantages no longer has. Here a generic casting roll is proposed, in which a roller shell with a circular and continuous circumference in the roller shell integrated cooling slots is shrunk onto a casting drum. Of the Starting from the collecting channels, the coolant is distributed on both sides into the cooling slots and occurs on the opposite side of the casting roll after walking a path from 180 ° out again in collecting channels. A serious disadvantage of this solution is doubling the amount of coolant required for cooling Keeping the necessary for the desired cooling effect constant Flow rate that results from the branching of the coolant flows. The additional need for coolant can be reduced by using it twice be counteracted, as also in DE-OS 196 12 202 in a special Embodiment is addressed. However, this possibility has the disadvantage of one complicated roll core construction. Furthermore, through this Coolant bypasses axial zones formed, the adjacent cooling slots of Coolants of different temperatures are flowed through, which is why these too Transitional areas, or in the different axial zones the middle Casting roll temperature varies significantly, in particular there is a jump in temperature when moving from one axial zone to the next. These temperature changes on the one hand mechanically and load the roller core and the roller shell on the other hand affect the cast metal band, since it is as uniform as possible thermal conditions in the axial direction are crucial for the Quality of the tape are. There is also the risk, which should not be underestimated, that the flow division into the circular cooling slots, for example by any Soiling, not done sufficiently equally.
Die Erfindung bezweckt die Vermeidung dieser Nachteile und Schwierigkeiten und stellt sich die Aufgabe, eine Gießwalze der eingangs beschriebenen Art zu schaffen, die bei minimiertem Kühlmittelverbrauch und eindeutig festliegenden Strömungsverhältnissen eine gleichmäßige Wärmeabfuhr vom Walzenmantel ermöglicht und die thermisch bedingten Wanderungsbestrebungen des Walzenmantels gegenüber dem Walzenkern zulässt. Ein weiteres Ziel der Erfindung ist es, eine konstruktiv und fertigungstechnisch einfache Gießwalze mit rotationsymmetrisch aufgebautem Walzenmantel vorzuschlagen, deren thermisch bedingte Dehnungen frei von mechanischen Behinderungen möglich sind.The invention aims to avoid these disadvantages and difficulties and provides the task of creating a casting roll of the type described in the opening paragraph minimized coolant consumption and clearly defined flow conditions enables uniform heat dissipation from the roll shell and the thermal conditional migration efforts of the roll shell towards the roll core allows. Another object of the invention is a constructive and manufacturing technology simple casting roller with rotationally symmetrical roller shell to propose whose thermal expansion is free of mechanical Disabilities are possible.
Diese Aufgabe wird bei einer Gießwalze der eingangs beschriebenen Art dadurch gelöst, dass das Mittel zur Umlenkung des Kühlmittels von der im wesentlichen radialen Zuleitung in die Kühlschlitze und zur Umlenkung des Kühlmittels von den Kühlschlitzen in die im wesentlichen radiale Ableitung von einem in die Kühlschlitze einsetzbaren und mit dem Walzenkem verbundenen Leitelement gebildet ist.This is achieved in a casting roll of the type described solved that the means for deflecting the coolant from the substantially radial Supply line in the cooling slots and for deflecting the coolant from the cooling slots in the essentially radial derivation from one that can be inserted into the cooling slots and is formed with the roll core connected guide element.
Bei einer Ausführungsform der Erfindung ist jedem Kühlschlitz ein Leitelement zugeordnet. Eine bevorzugte Ausführungform, die sich durch leichte Montierbarkeit auszeichnet, ist dadurch gekennzeichnet, dass mehreren benachbarten Kühlschlitzen ein gemeinsames Leitelement zugeordnet ist.In one embodiment of the invention, each cooling slot is a guide element assigned. A preferred embodiment, which is easy to assemble is characterized in that several adjacent cooling slots a common guide element is assigned.
Konstruktiv ist das Leitelement kammartig ausgebildet, wobei dessen einzelne Zähne in ihrer Breite und Tiefe im wesentlichen mit der Breite und Tiefe der Kühlschlitze übereinstimmen. Eine fertigungstechnisch einfache Ausgestaltung ergibt sich dadurch, dass das Leitelement aus plattenförmigen Einzelelementen aufgebaut ist, die abwechselnd Zähne und Zwischenräume bilden und mit einem die plattenförmigen Einzelelemente durchsetzenden Verbindungselement, vorzugsweise einem Bolzen zusammengehalten sind.Structurally, the guide element is comb-like, with its individual teeth in their width and depth essentially with the width and depth of the cooling slots to match. A simple design in terms of production technology results from that the guide element is made up of plate-shaped individual elements which alternately form teeth and gaps and with one the plate-shaped Connecting element penetrating individual elements, preferably a bolt are held together.
Nach einer bevorzugten Ausgestaltung der Erfindung ist zwischen dem Walzenmantel und dem Leitelement, insbesondere zwischen dem Kühlschlitzgrund und der Stimfläche des Leitelementes, ein definierter Spalt eingestellt. Der definierte Spalt ermöglicht eine erwünschte in ihrem Ausmaß vorbestimmte Leckströmung zwischen Einströmbereich und Ausströmbereich, wodurch ein möglichst axialsymmetrisches Betriebsverhalten des Walzenmantels erzielt wird. Besonders günstige Verhältnisse werden dadurch erzielt, daß der Spalt in Abhängigkeit der tiefenveränderlichen Leitelementlänge so dimensioniert ist, daß die mittlere Kühlmittelströmungsgeschwindigkeit im Spalt der Kühlmittelströmungsgeschwindigkeit in den sonstigen Bereichen der Kühlschlitze entspricht. Der Spalt zwischen Leitelement und Walzenmantel wird demnach so dimensioniert, daß im Bereich der Leitelemente ähnliche Kühlverhältnisse erzielt werden, wie auch sonst überall am Walzenmantel. Für eine Spaltlänge von 50 mm ergeben sich aus Berechnungen je nach Druckdifferenz und mittlerer Kühlmittelströmungsgeschwindigkeit (4 bis 15 m/s) Spaltstärken von ca. 0,3 bis 0,8 mm.According to a preferred embodiment of the invention is between the roll shell and the guide element, in particular between the cooling slot base and the end face of the guide element, a defined gap is set. The defined gap enables one desired leakage flow between the inflow area which is predetermined in its extent and outflow area, as a result of the axially symmetrical operating behavior of the Roll jacket is achieved. Particularly favorable conditions are achieved that the gap as a function of the depth-variable guide element length is dimensioned that the average coolant flow rate in the gap of Coolant flow rate in the other areas of the cooling slots equivalent. The gap between the guide element and the roller jacket thus becomes so dimensioned that achieved similar cooling conditions in the area of the guide elements as everywhere else on the roller jacket. For a gap length of 50 mm result from calculations depending on the pressure difference and mean Coolant flow rate (4 to 15 m / s) gap thicknesses of approx. 0.3 to 0.8 mm.
Eine strömungstechnisch günstige Umlenkung des Kühlmittels von der radialen Zuleitung in die zirkularen Kühlschlitze und wieder zurück wird dadurch erreicht, daß die Zähne des Leitelementes in radialer Richtung zum Kühlschlitzgrund hin bogenförmig erweitert sind.A fluidically favorable deflection of the coolant from the radial Supply in the circular cooling slots and back is achieved in that the teeth of the guide element in the radial direction towards the cooling slot base are extended in an arc.
Nach einer weiteren Ausführungsform sind die Zähne des Leitelementes in radialer Richtung vorzugsweise bogenförmig verjüngt ausgebildet. Da solcherart dem Kühlschlitzgrund eine sehr schmale Stirnfläche des Leitelmentes gegenüberliegt, ist das Risiko einer Verstopfung des Spaltes zwischen diesen beiden Bauteilen minimiert bzw. unbedeutend und die Gefahr, daß durch nicht axialsymmetrische thermische Verhältnisse starke Deformationsasymmetrien entstehen, äußerst klein gehalten.According to a further embodiment, the teeth of the guide element are radial Direction preferably tapered arc-shaped. Since such Cooling slot base is a very narrow face of the guide element, that is Risk of clogging of the gap between these two components is minimized or insignificant and the risk that by not axially symmetrical thermal Relative asymmetries of deformation arise, kept extremely small.
Nach einer weiteren Ausführungsform werden die thermischen Verhältnisse im Walzenmantel dadurch zusätzlich vergleichmäßigt, daß einzelne Leitelemente oder Gruppen von mehreren nebeneinander in Richtung der Gießwalzenlängsachse angeordneten Leitelementen im Bezug auf die Gießwalzenlängsachse um einen Winkel versetzt zueinander angeordnet sind. Eine einfach strukturierte Gießwalze ergibt sich dadurch, daß sämtliche Leitelemente in einer Linie parallel zur Gießwalzenlängsachse ausgerichtet sind.According to a further embodiment, the thermal conditions in the Roll jacket additionally evened out that individual guide elements or Groups of several next to each other in the direction of the longitudinal axis of the casting roll arranged guide elements with respect to the longitudinal axis of the casting roll by an angle are staggered. The result is a simply structured casting roller in that all guide elements in a line parallel to the longitudinal axis of the casting roll are aligned.
Zur leichten Montage und Lagepositionierung ist das Leitelement durch eine Steckverbindung mit dem Walzenkern verbunden. Vorzugsweise ist das Leitelement durch eine Steckverbindung mit einer Trennwand zwischen der Zuleitung und der Ableitung für das Kühlmittel verbunden. Die Trennwand ist Teil des Walzenkerns. Erfindungsgemäß ist die Steckverbindung im wesentlichen von einer zur Gießwalzenlängsachse parallel angeordneten Nut gebildet. For easy assembly and positioning, the guide element is equipped with a Plug connection connected to the roller core. The guide element is preferably by a plug connection with a partition between the supply line and the Drainage for the coolant connected. The partition is part of the roll core. According to the invention, the plug connection is essentially from one to the other Casting roll longitudinal axis parallel groove formed.
Vorzugsweise besteht das Leitelement aus einem Material gleicher oder geringerer Wärmeleitfähigkeit wie der Walzenmantel, um Montageprobleme und ein Klemmen im Kühlschlitz sicher zu vermeiden.The guide element preferably consists of a material of the same or less Thermal conductivity like the roller jacket to avoid assembly problems and jamming in the Avoid cooling slot safely.
Im folgenden wird die Erfindung anhand von Ausführungsbeispielen näher erläutert. Im
einzelnen zeigen:
Eine Zweiwalzengießanlage zum kontinuierlichen Gießen eines Stahlbandes in einem
Dickenbereich von 1 mm bis 12 mm besteht aus zwei in Pfeilrichtung gegenläufig
rotierenden, angetriebenen Gießwalzen 1 mit zueinander parallellen
Gießwalzenlängsachsen 2. Der Gießraum 3, in den Schmelze kontinuierlich
eingebracht wird, ist von den beiden Gießwalzen 1 und den an deren Stirnseiten
anstellbaren Seitenwänden 4 gebildet. Nach unten wird das kontinuierlich erzeugte
Stahlband 5 abgezogen. Durch den Walzenzapfen 6 wird Kühlmittel in Pfeilrichtung 7
zugeführt und nach Durchlaufen und Kühlen der Gießwalzenoberfläche von Innen in
Pfeilrichtung 8 wieder abgeführt. Eine Zweiwalzengießanlage dieser Art ist
beispielsweise auch in der IT - PS 1 255 817 in Fig. 1 dargestellt.A two-roll caster for the continuous casting of a steel strip in one
Thickness range from 1 mm to 12 mm consists of two in opposite directions in the direction of the arrow
rotating, driven casting rolls 1 with parallel to each other
Casting roll
Fig. 2 zeigt beispielshaft den inneren Aufbau einer ersten Ausführungsform der
Gießwalze 1, die von einem Walzenkern 9 und einem Walzenmantel 10 gebildet ist.
Der Walzenkern 9 besteht aus einer Stahltrommel 11, die mit dem hier nicht
dargestellten Walzenzapfen und diversen Seitenwänden und Verstärkungsrippen als
Schweißkonstruktion hergestellt ist. Die Stahltrommel 11 enthält Durchtrittsöffnungen,
die Zuleitungen 12 und Ableitungen 13 für das Kühlmittel bilden, welches durch den
Walzenzapfen 6 zu- und abgeleitet wird. Die Details des Kühlmittelkreislaufes
zwischen Walzenzapfen 6 und der Zuleitung 12 und der Ableitung 13 sind nicht
dargestellt, können jedoch analog der in der IT - PS 1 255 817 dargestellten
Ausführungsform ausgestaltet sein.Fig. 2 shows an example of the internal structure of a first embodiment of the
Casting roll 1, which is formed by a
Der beispielsweise aus Kupfer oder einer Kupferlegierung hergestellte Walzenmantel
10 weist an seiner Innenseite zirkular ununterbrochene, umlaufende Kühlschlitze 14
auf, denen das Kühlmittel in Pfeilrichtung über die Zuleitung 12 zugeführt und nach
Durchströmen des Kühlschlitzes 14 in Pfeilrichtung durch die Ableitung 13 wieder
abgeleitet wird. Mehreren der zirkularen, nebeneinander angeordneten Kühlschlitze 14
ist eine sich in Richtung der Gießwalzenlängsachsen 2 erstreckende
Kühlmittelverteilkammer 15 zugeordnet, zu der die Zuleitung 12 erweitert ist. Analog ist
die Ableitung 13 in ihrem Übergangsbereich von den Kühlschlitzen 14 zu einer
Kühlmittelsammelkammer 16 erweitert. Dadurch ergibt sich ein mechanisch einfacher
Aufbau des Walzenkerns 9. Die Kühlschlitze 14 können auch wendelförmig in den
Walzenmantel 10 eingearbeitet sein.The roll shell made, for example, of copper or a
Im Übergangsbereich zwischen den Zu- und Ableitungen 12, 13 bzw. der
Kühlmittelverteilkammer 15 oder der Kühlmittelsammelkammer 16 und den
Kühlschlitzen 14 ist ein Leitelement 17 zur definierten Umlenkung des Kühlmittels und
der Trennung der Kühlmittelströme zwischen Zuleitung 12 und Ableitung 13
vorgesehen. Das Leitelement 17 ist mit einer Steckverbindung 18 mit der Trennwand 19
zwischen Zuleitung 12 und Ableitung 13 verbunden.In the transition area between the supply and
Wie in den Fig. 3a und 3b dargestellt, weist des Leitelement 17 mehrere Zähne 20 auf,
die von einem Sockel 21 aufragen und deren Abstand, Breite und Tiefe auf den
Abstand, die Breite und Tiefe der Kühlschlitze 14 abgestimmt sind. Nach einer
fertigungstechnisch einfachen, in Fig. 7 dargestellten Ausführungsform kann das
Leitelement 17 aus plattenförmigen Einzelelementen 26, 27 aufgebaut sein, die
abwechselnd Zähne und Zwischenräume bzw. Sockelteile bilden und mit einem die
plattenförmigen Einzelelemente durchsetzenden Verbindungselement, vorzugsweise
einem Bolzen 28, zusammengehalten sind.As shown in FIGS. 3a and 3b, the
Die Zähne 20 sind, wie Fig. 2 zeigt, zur verbesserten Kühlmittelumleitung zum
Kühlschlitzgrund 22 hin bogenförmig erweitert. Der Sockel 21 ist der Steckverbindung
18 entsprechend ausgebildet und mit der Trennwand 19 stirnseitig gleitend
verbunden. Zu Montagezwecken wird das Leitelement 17 in den Kühlschlitzen 14 mit
dem Walzenmantel 10 verklebt. Die Klebeverbindung soll jedoch nur geringe Festigkeit
aufweisen.The
Die Fig. 4 und 5 zeigen ein Leitelement 17 mit definiertem Spalt 23 zwischen den
Zähnen 20 des Leitelementes 17 und den Wänden der Kühlschlitze 14 im
Walzenmantel 10. Zur Einstellung des definierten Spaltes 23 sind die Zähne 20
stirnseitig und an deren Seitenwänden mit in Sacklöchern eingesetzten Distanzhaltern
24 bestückt. Die Sacklöcher sind durch deren Mittellinien 25 angedeutet.4 and 5 show a
In Fig. 6 ist eine Ausführungsform des Leitelementes 17 mit in radialer Richtung zum
Kühlschlitzgrund 22 verjüngt verlaufenden Zähnen 20 dargestellt. In allen anderen
Bauelementen entspricht diese Ausführungsform der Ausführungsform gemäß Fig. 2.6 is an embodiment of the
Claims (15)
- A casting roll for the continuous casting of a metal strip, preferably of a steel strip within a strip thickness range of 1 mm to 12 mm, consisting of a roll core (9) and of a roll casing (10) drawn on the roll core (9) and consisting of thermally conductive material, there being arranged between the roll core (9) and the roll casing (10) peripheral cooling slots (14) which are connected to essentially radial feed and discharge lines (13) for the coolant and to a means for deflecting the coolant, characterized in that the means for deflecting the coolant from the essentially radial feedline (12) into the cooling slots (14) and for deflecting the coolant from the cooling slots (14) into the essentially radial discharge lines (13) is formed by a guide element (17) capable of being inserted into the cooling slots (14) and connected to the roll core (9).
- The casting roll as claimed in claim 1, characterized in that each cooling slot (14) is assigned a guide element (17).
- The casting roll as claimed in claim 1, characterized in that a common guide element (17) is assigned to a plurality of adjacent cooling slots (14).
- The casting roll as claimed in one of the preceding claims 1 to 3, characterized in that the guide element (17) is of comb-like design, its individual teeth (20) coinciding in width and depth essentially to the width and depth of the cooling slots (17).
- The casting roll as claimed in one of the preceding claims 1 to 4, characterized in that the guide element (17) is constructed from plate-shaped individual elements (26,27) which alternatively form teeth and interspaces and are held together by means of a connecting element, preferably a bolt (28), passing through the plate-shaped individual elements.
- The casting roll as claimed in one of the preceding claims 1 to 5, characterized in that a defined gap (23) is set between the roll casing (10) and the guide element (17), in particular between the cooling slot bottom (22) and the end face of the guide element (17).
- The casting roll as claimed in claim 6, characterized in that the gap (23) is dimensioned as a function of the guide element length of variable depth, in such a way that the average coolant flow velocity in the gap corresponds to the coolant flow velocity in the other regions of the cooling slots (17).
- The casting roll as claimed in one of the preceding claims 1 to 7, characterized in that the teeth (20) of the guide element (17) are widened arcuately in the radial direction toward the cooling slot bottom (22).
- The casting roll as claimed in one of claims 1 to 7, characterized in that the teeth (20) of the guide element (17) are designed to be tapered preferably arcuately in the radial direction.
- The casting roll as claimed in one of the preceding claims 1 to 9, characterized in that individual guide elements (17) or groups of a plurality of guide elements (17) arranged next to one another in the direction of the casting roll longitudinal axis (2) are arranged, offset at an angle to one another, with respect to the casting roll longitudinal axis (2).
- The casting roll as claimed in one of the preceding claims 1 to 9, characterized in that all the guide elements (17) are oriented in a line parallel to the casting roll longitudinal axis (2).
- The casting roll as claimed in one of the preceding claims 1 to 11, characterized in that the guide element (17) is connected to the roll core (9) by means of a plug connection (18).
- The casting roll as claimed in one of the preceding claims 1 to 11, characterized in that the guide element (17) is connected by means of a plug connection (18)to a partition (19) between the feedline (12) and the discharge line (13) for the coolant.
- The casting roll as claimed in one of claims 12 and 13, characterized in that the plug connection (18) is formed essentially by a groove arranged parallel to the casting roll longitudinal axis (2).
- The casting roll as claimed in one of the preceding claims 1 to 14, characterized in that the guide element (17) consists of a material having a thermal conductivity equal to or lower than that of the roll casing (10).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT97RM000257A IT1290603B1 (en) | 1997-05-02 | 1997-05-02 | CASTING CYLINDER |
ITRM970257 | 1997-05-02 | ||
PCT/EP1998/002533 WO1998050183A1 (en) | 1997-05-02 | 1998-04-29 | Casting roll |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0979154A1 EP0979154A1 (en) | 2000-02-16 |
EP0979154B1 true EP0979154B1 (en) | 2002-07-17 |
Family
ID=11405034
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98924242A Expired - Lifetime EP0979154B1 (en) | 1997-05-02 | 1998-04-29 | Casting roll |
Country Status (19)
Country | Link |
---|---|
US (1) | US6776216B1 (en) |
EP (1) | EP0979154B1 (en) |
JP (1) | JP4130482B2 (en) |
KR (1) | KR100541508B1 (en) |
CN (1) | CN1072057C (en) |
AT (1) | ATE220585T1 (en) |
AU (1) | AU727886B2 (en) |
BR (1) | BR9809346A (en) |
CA (1) | CA2288279C (en) |
CZ (1) | CZ289285B6 (en) |
DE (1) | DE59804811D1 (en) |
ES (1) | ES2182313T3 (en) |
ID (1) | ID22912A (en) |
IT (1) | IT1290603B1 (en) |
MY (1) | MY132889A (en) |
RU (1) | RU2198063C2 (en) |
UA (1) | UA46899C2 (en) |
WO (1) | WO1998050183A1 (en) |
ZA (1) | ZA983727B (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100335203C (en) * | 2003-01-08 | 2007-09-05 | 阿尔科公司 | Caster roll |
DE10316673A1 (en) * | 2003-04-10 | 2004-11-18 | Georg Springmann Industrie- Und Bergbautechnik Gmbh | Device for coupling a coolant supply to a roller |
CN102990021B (en) * | 2012-12-18 | 2016-01-13 | 江苏三环实业股份有限公司 | Relative rolling type. g., lead tape forming machine |
CN103464701B (en) * | 2013-09-05 | 2015-10-28 | 青岛云路新能源科技有限公司 | Amorphous crystallizer |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3537506A (en) * | 1968-08-08 | 1970-11-03 | United States Steel Corp | Fixed internal guides for cooling water in rotary strip-casting drum |
JPS57165355U (en) * | 1981-04-13 | 1982-10-18 | ||
US4537239A (en) * | 1982-07-13 | 1985-08-27 | Allied Corporation | Two piece casting wheel |
FR2587247B1 (en) * | 1985-09-17 | 1988-08-12 | Siderurgie Fse Inst Rech | CYLINDER FOR CONTINUOUS CASTING BETWEEN CYLINDERS, WITH COOLING FLUID CIRCULATION |
CH674166A5 (en) * | 1986-12-22 | 1990-05-15 | Lauener Eng Ag | |
US4842040A (en) * | 1988-08-10 | 1989-06-27 | Battelle Development Corporation | Uniform cooling of cast strip |
FR2654372B1 (en) * | 1989-11-16 | 1992-01-17 | Siderurgie Fse Inst Rech | CYLINDER FOR A CONTINUOUS CASTING DEVICE ON OR BETWEEN TWO CYLINDERS. |
US4993478A (en) * | 1990-03-16 | 1991-02-19 | Battelle Development Corporation | Uniformly-cooled casting wheel |
US5651410A (en) * | 1991-01-04 | 1997-07-29 | Davy Mckee (Sheffield) Limited | Cooling roll |
IT1255817B (en) * | 1992-08-10 | 1995-11-16 | Roll for a continuous casting machine with counter rotating rolls, in particular for the manufacture of strip | |
JPH06182499A (en) * | 1992-12-22 | 1994-07-05 | Mitsubishi Heavy Ind Ltd | Cooling roll in continuous casting apparatus and manufacture thereof |
US5522448A (en) * | 1994-09-27 | 1996-06-04 | Aluminum Company Of America | Cooling insert for casting mold and associated method |
IT1276656B1 (en) * | 1995-04-03 | 1997-11-03 | Innocenti Eng Spa | ROLLER FOR CONTINUOUS CASTING MOLD WITH COUNTER-ROTATING ROLLERS FOR THIN THICKNESS |
GB2324488A (en) * | 1997-04-24 | 1998-10-28 | Kvaerner Tech & Res Ltd | A casting roll with an interference fit between its inner core and outer shell |
-
1997
- 1997-05-02 IT IT97RM000257A patent/IT1290603B1/en active IP Right Grant
-
1998
- 1998-04-29 AU AU76506/98A patent/AU727886B2/en not_active Ceased
- 1998-04-29 UA UA99105930A patent/UA46899C2/en unknown
- 1998-04-29 DE DE59804811T patent/DE59804811D1/en not_active Expired - Lifetime
- 1998-04-29 BR BR9809346-0A patent/BR9809346A/en not_active IP Right Cessation
- 1998-04-29 CA CA002288279A patent/CA2288279C/en not_active Expired - Fee Related
- 1998-04-29 ES ES98924242T patent/ES2182313T3/en not_active Expired - Lifetime
- 1998-04-29 CZ CZ19993850A patent/CZ289285B6/en not_active IP Right Cessation
- 1998-04-29 AT AT98924242T patent/ATE220585T1/en active
- 1998-04-29 US US09/423,067 patent/US6776216B1/en not_active Expired - Lifetime
- 1998-04-29 JP JP54770198A patent/JP4130482B2/en not_active Expired - Fee Related
- 1998-04-29 CN CN98804778A patent/CN1072057C/en not_active Expired - Lifetime
- 1998-04-29 WO PCT/EP1998/002533 patent/WO1998050183A1/en active IP Right Grant
- 1998-04-29 EP EP98924242A patent/EP0979154B1/en not_active Expired - Lifetime
- 1998-04-29 KR KR1019997010064A patent/KR100541508B1/en not_active IP Right Cessation
- 1998-04-29 RU RU99125658/02A patent/RU2198063C2/en not_active IP Right Cessation
- 1998-04-29 ID IDW991194A patent/ID22912A/en unknown
- 1998-05-02 MY MYPI98001970A patent/MY132889A/en unknown
- 1998-05-04 ZA ZA983727A patent/ZA983727B/en unknown
Also Published As
Publication number | Publication date |
---|---|
ITRM970257A0 (en) | 1997-05-02 |
CN1072057C (en) | 2001-10-03 |
CZ9903850A3 (en) | 2001-08-15 |
ZA983727B (en) | 1999-06-23 |
MY132889A (en) | 2007-10-31 |
KR20010020434A (en) | 2001-03-15 |
DE59804811D1 (en) | 2002-08-22 |
KR100541508B1 (en) | 2006-01-10 |
IT1290603B1 (en) | 1998-12-10 |
UA46899C2 (en) | 2002-06-17 |
EP0979154A1 (en) | 2000-02-16 |
BR9809346A (en) | 2000-07-04 |
ID22912A (en) | 1999-12-16 |
JP4130482B2 (en) | 2008-08-06 |
CZ289285B6 (en) | 2001-12-12 |
AU727886B2 (en) | 2001-01-04 |
ES2182313T3 (en) | 2003-03-01 |
ITRM970257A1 (en) | 1998-11-02 |
CA2288279C (en) | 2007-03-13 |
ATE220585T1 (en) | 2002-08-15 |
US6776216B1 (en) | 2004-08-17 |
CN1255077A (en) | 2000-05-31 |
JP2001526590A (en) | 2001-12-18 |
WO1998050183A1 (en) | 1998-11-12 |
AU7650698A (en) | 1998-11-27 |
RU2198063C2 (en) | 2003-02-10 |
CA2288279A1 (en) | 1998-11-12 |
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