EP1654076B1 - Method for extending the casting cycle for two-roll strip casting, and installation for carrying out said method - Google Patents

Method for extending the casting cycle for two-roll strip casting, and installation for carrying out said method Download PDF

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Publication number
EP1654076B1
EP1654076B1 EP04764123A EP04764123A EP1654076B1 EP 1654076 B1 EP1654076 B1 EP 1654076B1 EP 04764123 A EP04764123 A EP 04764123A EP 04764123 A EP04764123 A EP 04764123A EP 1654076 B1 EP1654076 B1 EP 1654076B1
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European Patent Office
Prior art keywords
rolling
roll
casting
working rolls
rolls
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EP04764123A
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German (de)
French (fr)
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EP1654076A1 (en
Inventor
Heinrich Marti
Jacques Barbe
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Main Management Inspiration AG
SMS Siemag AG
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Main Management Inspiration AG
SMS Demag AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
    • B21B31/10—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by horizontally displacing, i.e. horizontal roll changing
    • B21B31/106—Vertical displacement of rolls or roll chocks during horizontal roll changing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
    • B21B31/12—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by vertically displacing

Definitions

  • the invention relates to a method for extending the casting cycle in two-roll strip casting, with in-line rolls for the steel strip, which is rolled in at least one, preferably two successive rolling units of a rolling mill with interchangeable work rolls.
  • the invention further relates to a system for carrying out the method.
  • a generic method and a generic device are eg from document EP-A 0707908 known.
  • Rolling work rolls are known to be subject to wear during operation. Therefore, it is necessary in rolling operation, in particular regularly replace the work rolls of the rolling units in the Endbanddicken Scheme to avoid that wear marks on the Endband lead to errors or that a bad strip surface is generated.
  • the rolling temperature is about 1000 ° -1200 ° C, ie as much as in the conventional hot rolling operation.
  • the belt speed is only 0.5-2.0 m / s and is thus much lower than in conventional operation, in which rolling at rolling speeds of about 20 m / s. Casting cycles of 10 hours or more are the goal in the casting process.
  • the invention has for its object to extend the casting cycle in two-roll strip casting of steel strip with in-line rolls of steel strip.
  • This object is achieved according to the invention in that in the rolling mill the work rolls to be changed are exchanged during casting under or over the steel strip and laterally out of the rolling unit. In this way it is possible to continue the casting process independently of the rolling process, because the casting cycle is not limited by the limited durability of the roll surface of the rolling work rolls.
  • the invention further provides that in the case of two successive rolling units during the roll change of the one rolling unit with the work rolls of the other rolling unit in use, a greater strip thickness than before the roll change is produced, namely according to the reduction rate of this unit.
  • the invention provides that, for the time being, the respective driven strip thickness is controlled by the work rolls of the rolling unit in use before the work rolls to be changed are relaxed.
  • the parameters influencing the casting thickness in the casting process such as casting speed and / or bath level height and / or heat dissipation and / or temperature of the introduced liquid steel, are changed during the roll change. This makes it possible, during the roll change, to vary the casting thickness according to the requirements of the rolling unit in operation.
  • the invention further relates to a system for carrying out the method according to the invention, whose at least one rolling unit, preferably its two successive rolling units are provided with over or under the steel band interchangeable work rolls.
  • the upper work rolls are inventively provided with lifting devices by means of which they can be lifted off the steel strip and pulled out laterally.
  • the work rolls can be raised by the lifting devices, and that the rolling mill are provided in front of and behind the work rolls with lifting rollers for the steel strip.
  • the lifting rollers are arranged at the free end of pivot levers.
  • the invention provides that the work rolls can be supported on moving and / or swing-in guides.
  • the invention provides that the work rolls to be replaced are provided with a common pull-out device.
  • the rolling mill shown in Figures 1 and 2 consists of two successive rolling units 1 and 2, each with a framework 3 or 4 and a pair of rolling work rolls 5a, 5b and 6a, 6b with support rollers 7a, 7b and 8a, 8b equipped. Both roller units are formed identically in detail. For the sake of simplicity, therefore, only the rolling unit 2 will be described in more detail below.
  • the work rolls 6a, 6b of this unit are mounted on bearing housings 9, 10 and 11, 12, which are supported on guide beams 13 and 14, respectively.
  • further guides 15, 16 are arranged for receiving the work rolls 6a and 6b when replacing the rolls.
  • the guide supports 13, 14 and thus the working rollers 6a and 6b supported thereon can be raised by means of hydraulic lifting devices 17, which are effective on support housings 19 and 20 of the guide supports 13, 14 together with working rollers 6a and 6b.
  • Their stroke direction is indicated in FIG. 2 by the reference numbers 21, 22.
  • the lifting rollers 24, 25 are arranged at the free ends of pivoting levers 26 and 27, respectively.
  • the work rolls 6a, 6b are associated with a pull-out device, not shown, for jointly pulling out the rolls from the area of the rolling line. Your pulling direction is indicated in Figure 2 by the reference numeral 28.
  • the respective driven strip thickness is initially controlled with the work rolls 5a, 5b of the rolling unit 1, namely before the work roll pair 6a, 6b to be changed is relaxed.
  • the roller unit 1 temporarily without transition, the same strip thickness as before with the two roller units 1 and 2 is generated together, in which case the roller unit 1 takes over the total reduction rate of the two rolling units.
  • the guide beams 13 and 14 are raised with the work rolls 6a, 6b by means of the lifting devices 17. Simultaneously with the steel strip 23 is lifted by means of the lifting rollers 24, 25.
  • the stroke of the work rolls and the steel strip is dimensioned so that after lifting the same above and below the steel strip between it and the work rolls an intermediate gap is formed. This ensures that when you replace the work rolls, they do not damage the tape surface.
  • the lifting devices 17 in such a way that they directly on the guide support 13, 14 of the Work rolls 6a, 6b are effective. In this case, the upper work roll 6a is lifted together with its associated support roll 8a, while the lower work roll 6b alone can be lifted.
  • the guides 15, 16 are moved with the work rolls. They can also be swiveled in and out as required.
  • each work roll may have its own pull-out device.
  • the method described is of course also for replacing the work rolls 5a, 5b of the rolling unit 1, as well as applicable to rolling mills with more than two successive rolling units.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)
  • Paper (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

A method for extending the casting cycle for the two-roll strip casting of a steel strip, with inline rolling thereof, the steel strip being rolled in at least two successive rolling units of a rolling mill having replaceable working rolls. The casting process is carried out independently from the roll replacement by replacing the working rolls of one rolling unit during the casting, below or above the steel strip. An installation for carrying out the method includes a lifting devices for lifting the working rolls off the steel strip so as not to damage the strip during the replacement of the rolls.

Description

Die Erfindung betrifft ein Verfahren zur Verlängerung des Giesszyklus beim Zweirollen-Bandgiessen, mit in-Line-Walzen für das Stahlband, das in mindestens einer, vorzugsweise zwei aufeinanderfolgenden Walzeinheiten eines Walzwerks mit auswechselbaren Arbeitsrollen gewalzt wird. Die Erfindung betrifft ferner eine Anlage zur Durchführung des Verfahrens.The invention relates to a method for extending the casting cycle in two-roll strip casting, with in-line rolls for the steel strip, which is rolled in at least one, preferably two successive rolling units of a rolling mill with interchangeable work rolls. The invention further relates to a system for carrying out the method.

Ein gattungsgemäßes Verfahren sowie eine gattungsgemäße Vorrichtung sind z.B aus Dokument EP-A 0707908 bekannt.A generic method and a generic device are eg from document EP-A 0707908 known.

Walzwerks-Arbeitsrollen sind bekanntlich im Betrieb Verschleiss unterworfen. Deshalb ist es im Walzbetrieb erforderlich, insbesondere die Arbeitsrollen der Walzeinheiten im Endbanddickenbereich regelmässig auszuwechseln, um zu vermeiden, dass Verschleissspuren auf dem Endband zu Fehlern führen bzw. dass eine schlechte Bandoberfläche erzeugt wird.Rolling work rolls are known to be subject to wear during operation. Therefore, it is necessary in rolling operation, in particular regularly replace the work rolls of the rolling units in the Endbanddickenbereich to avoid that wear marks on the Endband lead to errors or that a bad strip surface is generated.

1m herkömmlichen Warmwalzbetrieb werden die Arbeitsrollen der letzten Walzeinheiten etwa alle 3 Arbeitsstunden ausgewechselt. Der Wechsel erfolgt dabei im diskontinuierlichen Betrieb, d.h. zwischen den Walzungen.In conventional hot rolling operation, the work rolls of the last roll units are changed approximately every 3 working hours. The change takes place in discontinuous operation, i. between the rolling.

Beim neuartigen Zweirollen-Bandgiessen mit in-Line Walzen beträgt die Walztemperatur ca. 1000°-1200° C, also soviel wie im herkömmlichen Warmwalzbetrieb. Die Bandgeschwindigkeit beträgt jedoch nur 0,5-2,0 m/s und ist damit viel geringer als im herkömmlichen Betrieb, bei dem mit Walzgeschwindigkeiten von ca. 20 m/s gewalzt wird. Dabei werden im Giessprozess Giesszyklen von 10 Stunden und mehr angestrebt.In the new two-roll strip casting with in-line rolls, the rolling temperature is about 1000 ° -1200 ° C, ie as much as in the conventional hot rolling operation. However, the belt speed is only 0.5-2.0 m / s and is thus much lower than in conventional operation, in which rolling at rolling speeds of about 20 m / s. Casting cycles of 10 hours or more are the goal in the casting process.

Der Erfindung liegt die Aufgabe zugrunde, beim Zweirollen-Bandgiessen von Stahlband mit in-Line Walzen des Stahlbandes den Giesszyklus zu verlängern.The invention has for its object to extend the casting cycle in two-roll strip casting of steel strip with in-line rolls of steel strip.

Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass im Walzwerk die zu wechselnden Arbeitsrollen während des Giessens unter bzw. über das Stahlband sowie seitlich aus der Walzeinheit herausziehbar ausgetauscht werden. Auf diese Weise ist es möglich, den Giessvorgang unabhängig vom Walzvorgang beliebig fortzusetzen, weil der Giesszyklus nicht durch die begrenzte Haltbarkeit der Rollenoberfläche der Walzwerks-Arbeitsrollen eingeschränkt wird.This object is achieved according to the invention in that in the rolling mill the work rolls to be changed are exchanged during casting under or over the steel strip and laterally out of the rolling unit. In this way it is possible to continue the casting process independently of the rolling process, because the casting cycle is not limited by the limited durability of the roll surface of the rolling work rolls.

Die Erfindung sieht ferner vor, dass bei zwei aufeinanderfolgenden Walzeinheiten während des Rollenwechsels der einen Walzeinheit mit den Arbeitsrollen der anderen, im Einsatz befindlichen Walzeinheit eine grössere Banddicke als vor dem Rollenwechsel erzeugt wird, nämlich entsprechend der Reduktionsrate dieser Einheit.The invention further provides that in the case of two successive rolling units during the roll change of the one rolling unit with the work rolls of the other rolling unit in use, a greater strip thickness than before the roll change is produced, namely according to the reduction rate of this unit.

Alternativ dazu ist es erfindungsgemäss vorgesehen, dass bei zwei aufeinanderfolgenden Walzeinheiten während des Rollenwechsels der einen Walzeinheit, mit den Arbeitsrollen der im Einsatz befindlichen Walzeinheit vorübergehend ohne Übergang die gleiche Banddicke wie vor dem Rollenwechsel erzeugt wird, wobei sie dann die Gesamtreduktionsrate der beiden Walzeinheiten übernehmen. Somit bleibt die gefahrene Banddicke während des Wechselvorganges unverändert.Alternatively, it is provided according to the invention that in two successive rolling units during the roll change of a roller unit, with the work rolls of the rolling unit in use temporarily transiently without transition the same strip thickness is generated as before the roll change, in which case they take over the total reduction rate of the two rolling units. Thus, the driven band thickness remains unchanged during the change process.

Um in der Übergangsphase Abweichungen der Banddicke zu vermeiden, sieht die Erfindung vor, dass vorerst die jeweils gefahrene Banddicke mit den Arbeitsrollen der im Einsatz befindlichen Walzeinheit angesteuert wird, bevor die zu wechselnden Arbeitsrollen entspannt werden.In order to avoid deviations in the strip thickness in the transition phase, the invention provides that, for the time being, the respective driven strip thickness is controlled by the work rolls of the rolling unit in use before the work rolls to be changed are relaxed.

Um die Arbeit der im Einsatz befindlichen Walzeinheit zu unterstützen, ist es erfindungsgemäss vorgesehen, dass während des Rollenwechsels die im Giessprozess die Giessdicke massgeblich beeinflussenden Parameter, wie Giessgeschwindigkeit und/oder Badspiegelhöhe und/oder Wärmeabfuhr und/oder Temperatur des eingebrachten Flüssigstahls verändert werden. Dadurch ist es möglich, während des Rollenwechsels die Giessdicke nach den Erfordernissen der im Betrieb befindlichen Walzeinheit zu variieren.In order to support the work of the roller unit in use, it is provided according to the invention that the parameters influencing the casting thickness in the casting process, such as casting speed and / or bath level height and / or heat dissipation and / or temperature of the introduced liquid steel, are changed during the roll change. This makes it possible, during the roll change, to vary the casting thickness according to the requirements of the rolling unit in operation.

Die Erfindung betrifft ferner eine Anlage zur Durchführung des erfindungsgemässen Verfahrens, deren mindestens eine Walzeinheit, vorzugsweise deren zwei aufeinanderfolgende Walzeinheiten mit über bzw. unter das Stahlband auswechselbaren Arbeitsrollen versehen sind. Um beim Rollenwechsel eine Beschädigung des Stahlbandes zu vermeiden, sind die oberen Arbeitsrollen erfindungsgemäss mit Hebevorrichtungen versehen, mittels derer sie vom Stahlband abhebbar sowie seitlich herausziehbar sind.The invention further relates to a system for carrying out the method according to the invention, whose at least one rolling unit, preferably its two successive rolling units are provided with over or under the steel band interchangeable work rolls. In order to avoid damage to the steel strip when changing rolls, the upper work rolls are inventively provided with lifting devices by means of which they can be lifted off the steel strip and pulled out laterally.

Hierfür ist es gemäss der Erfindung vorgesehen, dass die Arbeitsrollen durch die Hebevorrichtungen anhebbar sind, und dass das Walzwerk vor und hinter den Arbeitsrollen mit Heberollen für das Stahlband versehen sind. Zweckmässigerweise sind die Heberollen am freien Ende von Schwenkhebeln angeordnet.For this purpose, it is provided according to the invention that the work rolls can be raised by the lifting devices, and that the rolling mill are provided in front of and behind the work rolls with lifting rollers for the steel strip. Conveniently, the lifting rollers are arranged at the free end of pivot levers.

Durch gegenseitig abgestimmtes Anheben der Arbeitsrollen und des Stahlbandes wird zwischen diesem und den Arbeitsrollen ein Zwischenspalt erzeugt, der das berührungsfreie Durchlaufen des Stahlbandes zwischen den auszuwechselnden Arbeitsrollen sicherstellt.By mutually tuned lifting the work rolls and the steel strip between this and the work rolls an intermediate gap is created, which ensures the contact-free passage of the steel strip between the work rolls to be replaced.

Es ist dabei im Sinne einer einfachen Arbeitsweise von Vorteil, wenn die obere Arbeitsrolle zusammen mit der ihr zugeordneten Stützwalze anhebbar ist.It is in terms of a simple operation of advantage if the upper work roll can be raised together with its associated support roller.

Um den Wechselvorgang zu erleichtern bzw. zu beschleunigen, sieht die Erfindung vor, dass die Arbeitsrollen auf mitfahrende und/oder ein- und ausschwenkbare Führungen abstützbar sind.In order to facilitate or speed up the change process, the invention provides that the work rolls can be supported on moving and / or swing-in guides.

Ist der Verschleiss der auszuwechselnden Arbeitsrollen unterschiedlich, sind diese dann zweckmässigerweise einzeln auswechselbar. Sonst ist es aber von Vorteil, die beiden Arbeitsrollen paarweise gleichzeitig auszuwechseln. In diesem Fall sieht die Erfindung vor, dass die auszuwechselnden Arbeitsrollen mit einer gemeinsamen Auszugsvorrichtung versehen sind.If the wear of the work rolls to be changed varies, these are then expediently exchangeable individually. Otherwise, it is advantageous to replace the two work rolls in pairs at the same time. In this case, the invention provides that the work rolls to be replaced are provided with a common pull-out device.

Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiel unter Bezugnahme auf die Zeichnung näher erläutert.
Es zeigen:

Fig. 1
das Walzwerk einer Zweirollen-Giessanlage mit in-Line Walzwerk, in der Seitenansicht dargestellt,
Fig. 2
das Walzwerk aus Fig. 1, in einem Schnitt entlang der Linie II-II in Fig. 1 dargestellt, und
Fig. 3
die Einzelheit III aus Fig. 1 mit einer Ausführungsvariante der Heberollen für das Stahlband, schematisch dargestellt.
The invention will be explained in more detail using an exemplary embodiment with reference to the drawing.
Show it:
Fig. 1
the rolling mill of a two-roll casting plant with in-line rolling mill, shown in side view,
Fig. 2
the rolling mill of Fig. 1, shown in a section along the line II-II in Fig. 1, and
Fig. 3
the detail III of Fig. 1 with a variant of the lifting rollers for the steel strip, shown schematically.

Das in den Figuren 1 und 2 dargestellte Walzwerk besteht aus zwei aufeinanderfolgenden Walzeinheiten 1 und 2, jede mit einem Gerüst 3 bzw. 4 sowie einem Paar Walzwerks-Arbeitsrollen 5a, 5b bzw. 6a, 6b mit Stützrollen 7a, 7b bzw. 8a, 8b ausgerüstet. Beide Walzeinheiten sind im einzelnen identisch ausgebildet. Der Einfachheit halber wird daher nachfolgend nur die Walzeinheit 2 näher beschrieben.The rolling mill shown in Figures 1 and 2 consists of two successive rolling units 1 and 2, each with a framework 3 or 4 and a pair of rolling work rolls 5a, 5b and 6a, 6b with support rollers 7a, 7b and 8a, 8b equipped. Both roller units are formed identically in detail. For the sake of simplicity, therefore, only the rolling unit 2 will be described in more detail below.

Die Arbeitsrollen 6a, 6b dieser Einheit sind auf Lagergehäusen 9, 10 bzw. 11, 12 gelagert, die auf Führungsträgern 13 bzw. 14 abgestützt sind. In Fortsetzung dieser Träger sind weitere Führungen 15, 16 zur Aufnahme der Arbeitsrollen 6a und 6b beim Auswechseln der Rollen angeordnet.The work rolls 6a, 6b of this unit are mounted on bearing housings 9, 10 and 11, 12, which are supported on guide beams 13 and 14, respectively. In continuation of these carriers further guides 15, 16 are arranged for receiving the work rolls 6a and 6b when replacing the rolls.

Die Führungsträger 13, 14 und somit die darauf abgestützten Arbeitsrollen 6a bzw. 6b sind mittels hydraulischer Hebevorrichtungen 17 anhebbar, die auf Traggehäuse 19 bzw. 20 der Führungsträger 13, 14 samt Arbeitsrollen 6a bzw. 6b wirksam sind. Ihre Hubrichtung ist in Figur 2 mit den Bezugszahlen 21, 22 gekennzeichnet.The guide supports 13, 14 and thus the working rollers 6a and 6b supported thereon can be raised by means of hydraulic lifting devices 17, which are effective on support housings 19 and 20 of the guide supports 13, 14 together with working rollers 6a and 6b. Their stroke direction is indicated in FIG. 2 by the reference numbers 21, 22.

Das Stahlband 23, das in der nicht dargestellten Zweirollen-Giessanlage hergestellt wird, durchläuft die Walzeinheiten 1 und 2, gestützt auf hydraulisch anhebbaren Heberollen 24, 25, die vor und hinter den Arbeitsrollen 5a, 5b bzw. 6a, 6b der Walzeinheiten 1 und 2 platziert sind. In der Variante nach Figur 3 sind die Heberollen 24, 25 an den freien Enden von Schwenkhebeln 26 bzw. 27 angeordnet.The steel strip 23, which is produced in the two-roll casting installation, not shown, passes through the rolling units 1 and 2, supported on hydraulically liftable lifting rollers 24, 25, in front of and behind the work rolls 5a, 5b and 6a, 6b of the rolling units 1 and 2 are placed. In the variant according to FIG. 3, the lifting rollers 24, 25 are arranged at the free ends of pivoting levers 26 and 27, respectively.

Den Arbeitsrollen 6a, 6b sind eine nicht dargestellte Auszugsvorrichtung zum gemeinsamen Herausziehen der Rollen aus dem Bereich der Walzstrecke zugeordnet. Ihre Zugrichtung ist in Figur 2 mit der Bezugszahl 28 gekennzeichnet.The work rolls 6a, 6b are associated with a pull-out device, not shown, for jointly pulling out the rolls from the area of the rolling line. Your pulling direction is indicated in Figure 2 by the reference numeral 28.

Zum Auswechseln der Arbeitsrollen 6a und 6b der Walzeinheit 2 wird vorerst mit den Arbeitsrollen 5a, 5b der Walzeinheit 1 die jeweils gefahrene Banddicke angesteuert, nämlich bevor das zu wechselnde Arbeitsrollenpaar 6a, 6b entspannt wird. Durch diese Verfahrensweise wird erreicht, dass mit der Walzeinheit 1 vorübergehend ohne Übergang weiterhin die gleiche Banddicke wie vorher mit den beiden Walzeinheiten 1 und 2 zusammen erzeugt wird, wobei dann die Walzeinheit 1 die Gesamtreduktionsrate der beiden Walzeinheiten übernimmt.To replace the work rolls 6a and 6b of the rolling unit 2, the respective driven strip thickness is initially controlled with the work rolls 5a, 5b of the rolling unit 1, namely before the work roll pair 6a, 6b to be changed is relaxed. By this procedure it is achieved that with the roller unit 1 temporarily without transition, the same strip thickness as before with the two roller units 1 and 2 is generated together, in which case the roller unit 1 takes over the total reduction rate of the two rolling units.

Anschliessend werden die Führungsträger 13 und 14 mit den Arbeitsrollen 6a, 6b mittels der Hebevorrichtungen 17 angehoben. Gleichzeitig damit wird auch das Stahlband 23 mittels der Heberollen 24, 25 angehoben.Subsequently, the guide beams 13 and 14 are raised with the work rolls 6a, 6b by means of the lifting devices 17. Simultaneously with the steel strip 23 is lifted by means of the lifting rollers 24, 25.

Hierbei wird die Hubstrecke der Arbeitsrollen und des Stahlbandes so bemessen, dass nach dem Anheben derselben ober- und unterhalb des Stahlbandes zwischen ihm und den Arbeitsrollen ein Zwischenspalt gebildet ist. Dadurch wird sichergestellt, dass beim Auswechseln der Arbeitsrollen diese keine Beschädigung der Bandoberfläche verursachen.Here, the stroke of the work rolls and the steel strip is dimensioned so that after lifting the same above and below the steel strip between it and the work rolls an intermediate gap is formed. This ensures that when you replace the work rolls, they do not damage the tape surface.

Es ist auch im Rahmen der Erfindung ohne weiteres möglich, die Hebevorrichtungen 17 so auszubilden, dass sie direkt auf die Führungsträger 13, 14 der Arbeitsrollen 6a, 6b wirksam sind. In diesem Fall wird die obere Arbeitsrolle 6a zusammen mit der ihr zugeordneten Stützrolle 8a angehoben, während die untere Arbeitsrolle 6b allein angehoben werden kann.It is also readily possible within the scope of the invention, the lifting devices 17 in such a way that they directly on the guide support 13, 14 of the Work rolls 6a, 6b are effective. In this case, the upper work roll 6a is lifted together with its associated support roll 8a, while the lower work roll 6b alone can be lifted.

Nach Anheben der Arbeitsrollen 6a und 6b werden diese gemeinsam in Richtung des Pfeils 28 auf den Führungsträgern 13, 14 und den sich daran anschliessenden Führungen 15, 16 aus dem Walzstreckenbereich herausgezogen und zur Reparaturwerkstatt abtransportiert. Um diesen Vorgang zu erleichtern, sind die Führungen 15, 16 mit den Arbeitsrollen mitfahrbar. Sie können auch nach Bedarf ein- bzw. ausgeschwenkt werden.After lifting the work rolls 6a and 6b, these are pulled together in the direction of arrow 28 on the guide beams 13, 14 and the subsequent thereto guides 15, 16 from the rolling range and transported away to the repair workshop. To facilitate this process, the guides 15, 16 are moved with the work rolls. They can also be swiveled in and out as required.

Das Einbauen der neuen Arbeitsrollen erfolgt analog, nur in umgekehrter Reihenfolge.The installation of the new work rolls takes place analogously, only in reverse order.

Selbstverständlich ist es im Rahmen der Erfindung auch möglich, die Arbeitsrollen 6a, 6b einzeln auszuwechseln, wobei in diesem Fall jede Arbeitsrolle eine eigene Auszugsvorrichtung aufweisen kann.Of course, it is within the scope of the invention also possible to replace the work rolls 6a, 6b individually, in which case each work roll may have its own pull-out device.

Es ist ebenfalls möglich, beim Auswechseln der Arbeitsrollen so zu verfahren, dass während des Rollenwechsels mit den Arbeitsrollen der im Einsatz befindlichen Walzeinheit eine grössere Banddicke erzeugt wird, nämlich entsprechend der Reduktionsrate dieser Einheit. Dadurch wird die Steuerung des Walzwerkes während des Wechselvorganges vereinfacht.It is also possible when replacing the work rolls to move so that during the roll change with the work rolls of the rolling unit in use a larger strip thickness is generated, namely according to the reduction rate of this unit. This simplifies the control of the rolling mill during the changing process.

Das beschriebene Verfahrens ist selbstverständlich auch zum Auswechseln der Arbeitsrollen 5a, 5b der Walzeinheit 1, sowie auch bei Walzwerken mit mehr als zwei aufeinanderfolgenden Walzeinheiten anwendbar.The method described is of course also for replacing the work rolls 5a, 5b of the rolling unit 1, as well as applicable to rolling mills with more than two successive rolling units.

Claims (13)

  1. Method of extending the casting cycle in two-roll strip casting, with in-line rolls for the steel strip, which is rolled in at least one rolling unit (1), preferably in two successive rolling units (1, 2), of a rolling mill with exchangeable working rolls (5a, 5b, 6a, 6b), characterised in that the working rolls (5a, 5b; 6a, 6b) to be changed during casting are exchanged by being withdrawable below and above the steel strip (23) as well as laterally from the rolling unit (1, 2).
  2. Method according to claim 1, characterised in that, in the case of two successive rolling units (1, 2), during the roll change of the rolling unit (2) a greater strip thickness than before the roll change is produced by the working rolls (5a, 5b) of the other rolling unit (1) disposed in use.
  3. Method according to claim 1, characterised in that, in the case of two successive rolling units (1, 2), during the roll change of the roll unit (2) the same thickness as before the roll change is produced, predominantly without transition, by the working rolls (5a, 5b) of the rolling unit (1) disposed in use, wherein they then take over the total reduction rate of the two rolling units (1, 2).
  4. Method according to claim 3, characterised in that before the working rolls (6a, 6b) to be changed are relieved there is for the time being control in drive to the respectively operated strip thickness by the working rolls (5a, 5b) of the rolling unit (1) disposed in use.
  5. Method according to claim 3 or 4, characterised in that during the roll change the parameters critically influencing casting thickness in the casting process, such as casting speed and/or bath surface level and/or heat dissipation and/or temperature of the introduced liquid steel, are changed in the sense of assisting the rolling unit (1) disposed in use.
  6. Installation for carrying out the method according to one of claims 1 to 5, the at least one rolling unit (1) of which, preferably two successive rolling units (1, 2) of which, is or are provided with exchangeable working rolls (5a, 5b, 6a, 6b) above or below the steel strip (23), characterised in that the working rolls (5a, 5b; 6a, 6b) are raisable from the steel strip (23) by means of lifting devices (17) as well as laterally withdrawable.
  7. Installation according to claim 6, characterised in that the working rolls (5a, 5b; 6a, 6b) are raisable by the lifting devices (17) and the rolling mill is provided in front of and behind the working rollers with lifting rollers (24, 25) for the steel strip (23).
  8. Installation according to claim 7, characterised in that the lifting rollers (24, 25) are arranged at the free end of pivot levers (26, 27).
  9. Installation according to claim 7 or 8, characterised in that the upper working roll (5a, 6a) is raisable together with the backing roll (7a, 8a) associated therewith.
  10. Installation according to one of claims 6 to 9, characterised in that the working rolls (5a, 5b; 6a, 6b) can be supported on guides (13, 14, 15, 16) which travel therewith and/or are pivotable in and pivotable out.
  11. Installation according to one of claims 6 to 10, characterised in that the working rolls (5a, 5b; 6a, 6b) are exchangeable singly or in pairs.
  12. Installation according to claim 11, characterised in that the working rolls (5a, 5b; 6a, 6b) exchangeable in pairs are provided with a common withdrawing device.
  13. Installation according to one of the preceding claims, characterised in that the upper working roll (5a, 6a) is raisable together with the upper backing roll (7a, 8a) associated therewith and/or the lower working roll (5b, 6b) is lowerable together with the lower backing roll (7b, 8b) associated therewith.
EP04764123A 2003-08-13 2004-08-13 Method for extending the casting cycle for two-roll strip casting, and installation for carrying out said method Active EP1654076B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01398/03A CH696521A5 (en) 2003-08-13 2003-08-13 Method of extending the casting cycle in two-roll strip casting and system for performing the method.
PCT/EP2004/009129 WO2005018843A1 (en) 2003-08-13 2004-08-13 Method for extending the casting cycle for two-roll strip casting, and installation for carrying out said method

Publications (2)

Publication Number Publication Date
EP1654076A1 EP1654076A1 (en) 2006-05-10
EP1654076B1 true EP1654076B1 (en) 2007-10-24

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EP04764123A Active EP1654076B1 (en) 2003-08-13 2004-08-13 Method for extending the casting cycle for two-roll strip casting, and installation for carrying out said method

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US (1) US7740052B2 (en)
EP (1) EP1654076B1 (en)
JP (1) JP4542099B2 (en)
CN (1) CN100553812C (en)
AT (1) ATE376460T1 (en)
BR (1) BRPI0413548A (en)
CA (1) CA2535615C (en)
CH (1) CH696521A5 (en)
DE (1) DE502004005331D1 (en)
RU (1) RU2338606C2 (en)
UA (1) UA86032C2 (en)
WO (1) WO2005018843A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006019514B3 (en) * 2006-04-27 2007-09-27 Sms Meer Gmbh Roll stand for the rolling tube, comprises a roll present on a roll shaft detachably connected over a coupling with drive shaft, and roll changing device exhibiting devices for lowering or lifting the roll, drawing cars and coupling device
CN102962262B (en) * 2011-09-02 2014-11-05 鞍钢股份有限公司 Roll changing method for preventing working roll traveling wheels from being damaged
KR101673860B1 (en) * 2014-12-30 2016-11-09 포스코강판 주식회사 Apparatus for film laminating and method for manufacturing laminated plate using the same

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT361649B (en) * 1979-06-28 1981-03-25 Voest Alpine Ag SUPPORT AND LEADERSHIP FOR CONTINUOUS CASTING PLANTS
AT362541B (en) * 1979-07-25 1981-05-25 Voest Alpine Ag DEVICE FOR REPLACING SUPPORT OR DRIVE ROLLERS OF A CONTINUOUS CASTING SYSTEM
WO1995026840A1 (en) * 1994-04-04 1995-10-12 Nippon Steel Corporation Twin-roll type continuous casting method and device
JP3067589B2 (en) * 1995-06-02 2000-07-17 株式会社日立製作所 Small-diameter work roll hot rolling mill with biting assist device
DE19540978A1 (en) * 1995-11-03 1997-05-07 Schloemann Siemag Ag Production plant for the continuous or discontinuous rolling out of hot strip
DE10163373C1 (en) 2001-12-22 2003-02-27 Masch Und Werkzeugbau Gmbh Changing the working rollers in a roll stand comprises arranging an upper supporting roller in a dismantling position below the maximum lifting position to drive the working roller set together with the lower supporting roller

Also Published As

Publication number Publication date
WO2005018843A1 (en) 2005-03-03
RU2338606C2 (en) 2008-11-20
BRPI0413548A (en) 2006-10-17
JP2007501713A (en) 2007-02-01
CA2535615C (en) 2011-03-29
US7740052B2 (en) 2010-06-22
US20070187065A1 (en) 2007-08-16
CH696521A5 (en) 2007-07-31
DE502004005331D1 (en) 2007-12-06
UA86032C2 (en) 2009-03-25
EP1654076A1 (en) 2006-05-10
ATE376460T1 (en) 2007-11-15
CN1835813A (en) 2006-09-20
JP4542099B2 (en) 2010-09-08
RU2006107532A (en) 2006-07-10
CA2535615A1 (en) 2005-03-03
CN100553812C (en) 2009-10-28

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