EP0941787A1 - Supporting element for continuous casting plant - Google Patents

Supporting element for continuous casting plant Download PDF

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Publication number
EP0941787A1
EP0941787A1 EP99103619A EP99103619A EP0941787A1 EP 0941787 A1 EP0941787 A1 EP 0941787A1 EP 99103619 A EP99103619 A EP 99103619A EP 99103619 A EP99103619 A EP 99103619A EP 0941787 A1 EP0941787 A1 EP 0941787A1
Authority
EP
European Patent Office
Prior art keywords
guide
roller
element according
guide element
strand
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.)
Granted
Application number
EP99103619A
Other languages
German (de)
French (fr)
Other versions
EP0941787B1 (en
Inventor
Fritz-Peter Prof. Dr. Ing. Pleschiutschnigg
Joachim Schwellenbach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Schloemann Siemag AG
Schloemann Siemag AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19841841A external-priority patent/DE19841841C2/en
Application filed by SMS Schloemann Siemag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Publication of EP0941787A1 publication Critical patent/EP0941787A1/en
Application granted granted Critical
Publication of EP0941787B1 publication Critical patent/EP0941787B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/20—Controlling or regulating processes or operations for removing cast stock
    • 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
    • B21B13/147—Cluster mills, e.g. Sendzimir mills, Rohn mills, i.e. each work roll being supported by two rolls only arranged symmetrically with respect to the plane passing through the working rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/14—Soft reduction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B29/00—Counter-pressure devices acting on rolls to inhibit deflection of same under load, e.g. backing rolls ; Roll bending devices, e.g. hydraulic actuators acting on roll shaft ends
    • 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
    • B21B31/02—Rolling stand frames or housings; Roll mountings ; Roll chocks
    • B21B31/04—Rolling stand frames or housings; Roll mountings ; Roll chocks with tie rods in frameless stands, e.g. prestressed tie rods
    • 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
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • B21B31/32—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis by liquid pressure, e.g. hydromechanical adjusting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/006—Pinch roll sets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/008—Rollers for roller conveyors

Definitions

  • the present invention relates to a guide element of a continuous caster, especially a thin slab caster for Guide a metal strip in a strand guiding direction, with at least one pair opposite each other with respect to the metal strip Guide rollers that form a roller gap.
  • This type of strand concavity can be in the region of the strand Solidification and after solidification are not fair at the same time become.
  • Special reasons for this are e.g. B. the reduction of Strand thickness during solidification between the mold outlet and Final solidification, in the professional world as casting rolls with a liquid core, known as “cast rolling" or “liquid core reduction”.
  • the strand shell lies on the area where the strand solidifies the role profile completely, caused by the ruling ferrostatic pressure or the pending steel column between Casting level and the observed strand shell point.
  • the strand frozen in its shape e.g. B. with a profile of advantageously 1% increase in thickness in the middle of the strand opposite the narrow side area, which continues on the way of the strand no longer as a percentage up to the end of the strand guide changes.
  • the only change that still occurs in the strand geometry occurs due to the cooling of the entire strand due to cooling.
  • This shrinkage of the strand after solidification must follow strand guidance to make a roller contact to the strand and thus ensure the rotation of the rollers.
  • the object of the present invention is therefore a To design the guide element of a continuous caster such that the strand concavity both in the area of solidification and after the solidification is optimally adjustable.
  • the object is achieved in that the pair of guide roles an adjusting device for setting a crown of the roller gap assigned. Because this means the roller gap on one Defined crowning that can be selected as required.
  • the adjustment device is both pressure and position controlled can be operated or controlled in a particularly simple manner and on the one hand the shape in the strand area with liquid core and on the other hand the roller contact in the solidified metal strip be guaranteed.
  • the setting device should preferably be on act on the central bearing.
  • the influence of the support roller on the guide roller is special reliable if the support roller turns over the guide roller a non-zero support angle is twisted.
  • the setting device can also have an additional support roller act on the at least one leadership role, the Support roller and the additional support roller in the strand guide direction seen above or below the guide roller are arranged.
  • At least one of the frames has a crossbar, use which he arranged centrally over the crossbar Fastening device is connected to a base segment guide, can the frame - e.g. when heated - symmetrical and unimpeded expand.
  • the setting of the roller gap between the guide rollers is preferably carried out by means of a hydraulic cushion.
  • the hydraulic cushion is preferably just like the adjustment device both pressure and position controlled or regulated adjustable.
  • the guide rollers 1, 2 form a roller gap 3 and lie with respect to one another leading metal strip 4 opposite.
  • the metal strip 4 has one Thickness between 40 and 100 mm, e.g. B. 50 mm.
  • the guide rollers 1, 2 are mounted in frames 5, 6.
  • the frames 5, 6 are designed to withstand tensile and compressive loads and via tie rods 7 tense together.
  • Between the frames 5, 6 is a hydraulic one Cushions 8 arranged. By means of this hydraulic cushion 8 the frames 5, 6 are adjustable relative to each other.
  • the guide rollers 1, 2 are according to FIG. 1 as split guide rollers educated. They therefore have center bearings 9, 10. In the middle of crossbeams 5 ', 6' are hydraulic cylinder units 11, 12 mounted, which act on the central bearings 9, 10.
  • the cross members 5 ', 6' are part of the respective frame 5, 6.
  • the crowning is via the hydraulic cylinder units 11, 12 of the roller gap 3 adjustable.
  • the hydraulic cylinder units 11, 12 thus form an adjusting device for adjusting the crowning of the roller gap 3, the pair of guide rollers 1, 2nd assigned.
  • the crown of the guided metal strip is 4 targeted at e.g. 1% or 2% adjustable.
  • the hydraulic cylinder units 11, 12 are both pressure and can be operated with position control. Likewise, the hydraulic one Pillow adjustable both pressure and position controlled. Instead of of hydraulic cylinder units 11, 12 are self-evident other control elements can also be used, e.g. electromechanical. Instead of a regulation there is also a control for pressure and Position can be used.
  • the adjusting device is position-controlled operated and the hydraulic cushion 8 position-controlled set. Due to the ferrostatic pressure caused by the Liquid core 4 'is conditional, the metal strip 4 thus adapts to the set roller gap 3.
  • the position regulations both a defined liquid core reduction possible as well as a defined crowning adjustable. The reduction the strand thickness during the solidification of the metal strip 4 can up to 60%.
  • the setting device is preferably pressure-controlled operated.
  • the hydraulic cushion 8 is also in this case preferably set pressure-controlled. Because that fits Roller gap 3 to the now rigid metal strip 4. The turning on the guide rollers are thus ensured. If a so-called Soft reduction should be desired, this can be done by default correspondingly high pressure setpoints can be achieved.
  • the lower cross member 6 'in FIG. 1 has a fastening device 13 on.
  • the fastening device 13 is relative to the Crossbar 6 'arranged centrally.
  • the fastening device 13 is the crossbar 6 'and with it the frame 5, 6 with a base segment guide 14 connected.
  • the fastening device 13 can work hydraulically or mechanically.
  • the so fixed Crossbeam 6 'of the frame 6 can therefore - e.g. with thermal Extend warming symmetrically. This makes mechanical Tensions avoided.
  • the guide rollers 1, 2 can, as shown in FIGS. 2 and 3, also be designed as continuous guide rollers 1, 2.
  • the corresponding hydraulic cylinder unit 11 acts, 12 via at least one support roller 15, 16 onto the respective guide roller 1, 2 a.
  • the support roller 15 is the only support roller which acts on the guide roller 1 preferably the support roller 15 by a support angle ⁇ compared to respective guide roller 1 rotated.
  • the support angle ⁇ should Range up to a maximum of 10 °.
  • the adjustment device as in the case of the lower guide roller 2, also via an additional support roller 17 on the respective guide roller 2 acts, is a rotation of the support roller 16 and Additional support roller 17 is not required. Because in this case can For example, the support roller 16 seen in the strand guide direction x above the guide roller 2 may be arranged while the additional support roller 17 is arranged below the guide roller 2.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Paper (AREA)

Abstract

The pair of guide rolls (1, 2) is provided with an adjustment unit (11, 12) to produce a camber in the roll gap (3).

Description

Die vorliegende Erfindung betrifft ein Führungselement einer Stranggießanlage, insbesondere einer Dünnbrammenstranggießanlage, zum Führen eines Metallbandes in einer Strangführungsrichtung, mit mindestens einem Paar sich bezüglich des Metallbandes gegenüberliegender Führungsrollen, die einen Rollenspalt bilden.The present invention relates to a guide element of a continuous caster, especially a thin slab caster for Guide a metal strip in a strand guiding direction, with at least one pair opposite each other with respect to the metal strip Guide rollers that form a roller gap.

Beim Stranggießen von Brammen, und hier besonders bei Gießgeschwindigkeiten zwischen 1,0 m/min bis 10 m/min, ist es von großer Bedeutung für die Gießsicherheit sowie für den Walzprozeß, daß der Strang zentrisch durch die Strangführung, die vorwiegend aus Rollen besteht, läuft.When continuously casting slabs, and especially at casting speeds between 1.0 m / min to 10 m / min, it is of great importance for casting reliability and for the rolling process that the strand centric through the strand guide, which mainly consists of rollers, running.

Dieser zentrische Lauf des Stranges während seiner Erstarrung führt zu

  • einem sicheren Gießverlauf, d. h. es werden Strangdurchbrüche im Kokillenbereich vermieden bzw. unterdrückt, und zu
  • einem symmetrischen Strangformat, das für die Erzeugung eines guten Warmbandprofiles mit einer Balligkeit 1 % und einer guten Planheit von Wichtigkeit ist.
This central run of the strand during its solidification leads to
  • a safe pouring process, ie strand breaks in the mold area are avoided or suppressed, and closed
  • a symmetrical strand format, which is important for the production of a good hot strip profile with a crowning of 1% and a good flatness.

Dieser zentrische Lauf der Bramme und die damit verbundene hohe Gießsicherheit bzw. symmetrische Brammenform gewinnt mit steigender Gießgeschwindigkeit und sinkender Brammendicke überproportional an Bedeutung. This centric run of the slab and the associated high Casting reliability or symmetrical slab shape wins with increasing Casting speed and decreasing slab thickness increase disproportionately Meaning.

Vor allem wird die Kontrolle einer symmetrischen Balligkeit bzw. eines symmetrischen Brammenprofils mit dünner werdender Bramme bzw. größer werdendem Breiten-Dicken-Verhältnis bedeutsamer, da bei einem Breiten-Dicken-Verhältnis von ca. 100/1 das Walzgut im Walzspalt von beispielsweise 1.000 mm Breite und 10 mm Dicke keine Breitung erfährt.Above all, the control of a symmetrical crowning or a symmetrical slab profile with slab becoming thinner or increasing width-to-thickness ratio is more important, because with one Width-thickness ratio of approx. 100/1 the rolling stock in the roll gap for example, 1,000 mm wide and 10 mm thick, no width experiences.

Es ist also für eine Dünnbramme mit einer Erstarrungsdicke von z.B. 150 bis 40 mm die Kontrolle des Erstarrungsprofils wichtiger als für eine Standard-Bramme von 200 mm Dicke.It is therefore suitable for a thin slab with a solidification thickness of e.g. 150 to 40 mm the control of the solidification profile more important than for a standard slab of 200 mm thickness.

Als Stand der Technik sind die Patentanmeldungen

  • PCT/DE 95/00 094; WO 95/20 448
  • PCT/DE 95/00 093; WO 95/20 446
  • PCT/DE 95/00 096; WO 95/20 447
zu nennen, bei denen die Rollenstrangführungen eine konkave Form aufweist.The patent applications are state of the art
  • PCT / DE 95/00 094; WO 95/20 448
  • PCT / DE 95/00 093; WO 95/20 446
  • PCT / DE 95/00 096; WO 95/20 447
to be mentioned in which the roller strand guides have a concave shape.

In den beiden erstgenannten Patentschriften weisen die Rollen eine konkave Mantellinie auf, bei denen der kleinste Durchmesser in der Rollenmitte auftritt.In the first two patents mentioned, the roles have a concave surface line on which the smallest diameter in the The middle of the roll occurs.

In der Patentanmeldung PCT/DE 95/00 096 wird die konkave Rollenstrangführung durch eine unter Last sich einstellende Durchbiegung von maximal 8 % erzeugt.In the patent application PCT / DE 95/00 096 the concave roller strand guide due to a deflection occurring under load generated by a maximum of 8%.

Diese Art der Strangkonkavität kann dem Strang im Bereich der Erstarrung und nach der Erstarrung nicht gleichzeitig gerecht werden. Besondere Gründe hierfür sind z. B. die Reduktion der Strangdicke während der Erstarrung zwischen Kokillenaustritt und Enderstarrung, in der Fachwelt als Gießwalzen mit flüssigem Kern, "cast rolling" oder auch "liquid core reduction" bekannt. In diesem Bereich der Erstarrung des Stranges legt sich die Strangschale an das Rollenprofil völlig an, verursacht durch den herrschenden ferrostatischen Druck bzw. die anstehende Stahlsäule zwischen Gießspiegel und dem beobachteten Strangschalenpunkt.This type of strand concavity can be in the region of the strand Solidification and after solidification are not fair at the same time become. Special reasons for this are e.g. B. the reduction of Strand thickness during solidification between the mold outlet and Final solidification, in the professional world as casting rolls with a liquid core, known as "cast rolling" or "liquid core reduction". In this The strand shell lies on the area where the strand solidifies the role profile completely, caused by the ruling ferrostatic pressure or the pending steel column between Casting level and the observed strand shell point.

Nach dem letzten Erstarrungspunkt bzw. nach der Enderstarrung ist der Strang in seiner Form eingefroren, z. B. mit einem Profil von vorteilhafterweise 1 % Dickenüberhöhung in der Mitte des Stranges gegenüber dem Schmalseitenbereich, die sich auf dem weiteren Weg des Stranges bis an das Ende der Strangführung prozentual nicht mehr ändert. Die einzige noch eintretende Änderung in der Stranggeometrie tritt durch den abkühlungsbedingten Schrumpf des Gesamtstranges auf.After the last solidification point or after the final solidification the strand frozen in its shape, e.g. B. with a profile of advantageously 1% increase in thickness in the middle of the strand opposite the narrow side area, which continues on the way of the strand no longer as a percentage up to the end of the strand guide changes. The only change that still occurs in the strand geometry occurs due to the cooling of the entire strand due to cooling.

Diesem Schrumpf des Stranges nach der Durcherstarrung muß die Strangführung folgen, um einen Rollenkontakt zum Strang und damit das Drehen der Rollen sicherzustellen.This shrinkage of the strand after solidification must Follow strand guidance to make a roller contact to the strand and thus ensure the rotation of the rollers.

Die Aufgabe der vorliegenden Erfindung besteht somit darin, ein Führungselement einer Stranggießanlage derart auszugestalten, daß die Strangkonkavität sowohl im Bereich der Erstarrung als auch nach der Erstarrung optimal einstellbar ist.The object of the present invention is therefore a To design the guide element of a continuous caster such that the strand concavity both in the area of solidification and after the solidification is optimally adjustable.

Die Aufgabe wird dadurch gelöst, daß dem Paar von Führungsrollen eine Einstelleinrichtung zum Einstellen einer Bombierung des Rollenspaltes zugeordnet ist. Denn dadurch ist der Rollenspalt auf eine definierte, nach Bedarf vorwählbare Bombierung einstellbar.The object is achieved in that the pair of guide roles an adjusting device for setting a crown of the roller gap assigned. Because this means the roller gap on one Defined crowning that can be selected as required.

Wenn die Einstelleinrichtung sowohl druck- als auch positionsgesteuert bzw. -geregelt betreibbar ist, kann auf besonders einfache Art und Weise einerseits die Formgebung im Strangbereich mit Flüssigkern und andererseits der Rollenkontakt im durcherstarrten Metallband gewährleistet werden. Insbesondere ist auch eine sogenannte Flüssigkernreduzierung leicht zu bewerkstelligen. If the adjustment device is both pressure and position controlled can be operated or controlled in a particularly simple manner and on the one hand the shape in the strand area with liquid core and on the other hand the roller contact in the solidified metal strip be guaranteed. In particular, there is also a so-called liquid core reduction easy to do.

Wenn mindestens eine der Führungsrollen eine Mittenlagerung aufweist, z.B. weil die Führungsrolle als geteilte Führungsrolle ausgebildet ist, sollte die Einstelleinrichtung vorzugsweise auf die Mittenlagerung einwirken.If at least one of the guide rollers has a central bearing, e.g. because the leadership role as a shared leadership role is formed, the setting device should preferably be on act on the central bearing.

Wenn hingegen mindestens eine der Führungsrollen als durchgehende Führungsrolle ausgebildet ist, sollte die Einstelleinrichtung über mindestens eine Stützrolle auf die mindestens eine Führungsrolle einwirken.If, on the other hand, at least one of the leadership roles is considered continuous Guide roller is formed, the adjustment should over at least one support roller on the at least one guide roller act.

Die Einwirkung der Stützrolle auf die Führungsrolle ist besonders zuverlässig, wenn die Stützrolle gegenüber der Führungsrolle um einen von Null verschiedenen Stützwinkel verdreht ist.The influence of the support roller on the guide roller is special reliable if the support roller turns over the guide roller a non-zero support angle is twisted.

Alternativ kann die Einstelleinrichtung auch über eine Zusatzstützrolle auf die mindestens eine Führungsrolle einwirken, wobei die Stützrolle und die Zusatzstützrolle in Strangführungsrichtung gesehen oberhalb bzw. unterhalb der Führungsrolle angeordnet sind.As an alternative, the setting device can also have an additional support roller act on the at least one leadership role, the Support roller and the additional support roller in the strand guide direction seen above or below the guide roller are arranged.

Wenn die Führungsrollen und die Einstelleinrichtung in zug- und druckbelastbaren Rahmen gelagert sind und die Rahmen einstellbar relativ zueinander verspannt sind, ergibt sich eine besonders genaue Einstellbarkeit der Bombierung sowie des Rollenspaltes insgesamt.If the guide rollers and the adjustment device in pull and compressible frames are stored and the frame adjustable are braced relative to each other, there is a particularly accurate Adjustment of the crowning and the roller gap overall.

Wenn mindestens einer der Rahmen eine Quertraverse aufweist, mittels derer er über eine zentrisch bezüglich der Quertraverse angeordnete Befestigungsvorrichtung mit einer Basissegmentführung verbunden ist, kann sich der Rahmen - z.B. bei Erwärmung - symmetrisch und ungehindert ausdehnen.If at least one of the frames has a crossbar, use which he arranged centrally over the crossbar Fastening device is connected to a base segment guide, can the frame - e.g. when heated - symmetrical and unimpeded expand.

Die Einstellung des Rollenspaltes zwischen den Führungsrollen erfolgt vorzugsweise mittels eines hydraulischen Kissens. Das hydraulische Kissen ist vorzugsweise ebenso wie die Einstelleinrichtung sowohl druck- als auch positionsgesteuert bzw. -geregelt einstellbar.The setting of the roller gap between the guide rollers is preferably carried out by means of a hydraulic cushion. The hydraulic cushion is preferably just like the adjustment device both pressure and position controlled or regulated adjustable.

Weitere Vorteile und Einzelheiten ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels. Dabei zeigen in Prinzipdarstellung

Figur 1
ein Führungselement,
Figur 2
ein Paar von Führungsrollen mit Stützrollen in Strangführungsrichtung und
Figur 3
eine Seitenansicht von Fig. 2.
Further advantages and details emerge from the following description of an exemplary embodiment. Show in principle
Figure 1
a guide element
Figure 2
a pair of guide rollers with support rollers in the strand guide direction and
Figure 3
2 shows a side view of FIG. 2.

Gemäß Fig. 1 weist ein Führungselement einer Dünnbrammen-Stranggießanlage ein Paar Führungsrollen 1, 2 auf. Die Führungsrollen 1, 2 bilden einen Rollenspalt 3 und liegen einander bezüglich eines zu führenden Metallbandes 4 gegenüber. Das Metallband 4 weist eine Dicke zwischen 40 und 100 mm, z. B. 50 mm auf. Mittels der Führungsrollen 1, 2 ist das Metallband 4 in einer Strangführungsrichtung x führbar.1 shows a guide element of a thin slab caster a pair of guide rollers 1, 2. The guide rollers 1, 2 form a roller gap 3 and lie with respect to one another leading metal strip 4 opposite. The metal strip 4 has one Thickness between 40 and 100 mm, e.g. B. 50 mm. By means of the guide rollers 1, 2 is the metal strip 4 in a strand guiding direction x feasible.

Die Führungsrollen 1, 2 sind in Rahmen 5, 6 gelagert. Die Rahmen 5, 6 sind zug- und druckbelastbar ausgebildet und über Zuganker 7 miteinander verspannt. Zwischen den Rahmen 5, 6 ist ein hydraulisches Kissen 8 angeordnet. Mittels dieses hydraulischen Kissens 8 sind die Rahmen 5, 6 relativ zueinander einstellbar.The guide rollers 1, 2 are mounted in frames 5, 6. The frames 5, 6 are designed to withstand tensile and compressive loads and via tie rods 7 tense together. Between the frames 5, 6 is a hydraulic one Cushions 8 arranged. By means of this hydraulic cushion 8 the frames 5, 6 are adjustable relative to each other.

Die Führungsrollen 1, 2 sind gemäß Fig. 1 als geteilte Führungsrollen ausgebildet. Sie weisen daher Mittenlagerungen 9, 10 auf. In der Mitte von Quertraversen 5', 6' sind Hydraulikzylindereinheiten 11, 12 gelagert, welche auf die Mittenlagerungen 9, 10 einwirken. The guide rollers 1, 2 are according to FIG. 1 as split guide rollers educated. They therefore have center bearings 9, 10. In the middle of crossbeams 5 ', 6' are hydraulic cylinder units 11, 12 mounted, which act on the central bearings 9, 10.

Die Quertraversen 5', 6' sind Bestandteil der jeweiligen Rahmen 5, 6. Über die Hydraulikzylindereinheiten 11, 12 ist die Bombierung des Rollenspaltes 3 einstellbar. Die Hydraulikzylindereinheiten 11, 12 bilden somit eine Einstelleinrichtung zum Einstellen der Bombierung des Rollenspaltes 3, die dem Paar von Führungsrollen 1, 2 zugeordnet ist. Somit ist die Balligkeit des geführten Metallbandes 4 gezielt auf z.B. 1% oder 2% einstellbar.The cross members 5 ', 6' are part of the respective frame 5, 6. The crowning is via the hydraulic cylinder units 11, 12 of the roller gap 3 adjustable. The hydraulic cylinder units 11, 12 thus form an adjusting device for adjusting the crowning of the roller gap 3, the pair of guide rollers 1, 2nd assigned. Thus, the crown of the guided metal strip is 4 targeted at e.g. 1% or 2% adjustable.

Die Hydraulikzylindereinheiten 11, 12 sind sowohl druck- als auch positionsgeregelt betreibbar. Ebenso ist auch das hydraulische Kissen sowohl druck- als auch positionsgeregelt einstellbar. Anstelle von Hydraulikzylindereinheiten 11, 12 sind selbstverständlich auch andere Stellelemente einsetzbar, z.B. elektromechanische. Anstelle einer Regelung ist auch eine Steuerung für Druck und Position einsetzbar.The hydraulic cylinder units 11, 12 are both pressure and can be operated with position control. Likewise, the hydraulic one Pillow adjustable both pressure and position controlled. Instead of of hydraulic cylinder units 11, 12 are self-evident other control elements can also be used, e.g. electromechanical. Instead of a regulation there is also a control for pressure and Position can be used.

Wenn das Metallband 4 noch nicht durcherstarrt ist, also einen Flüssigkern 4' aufweist, wird die Einstelleinrichtung positionsgeregelt betrieben und das hydraulische Kissen 8 positionsgeregelt eingestellt. Aufgrund des ferrostatischen Drucks, der durch den Flüssigkern 4' bedingt ist, paßt sich somit das Metallband 4 an den eingestellten Rollenspalt 3 an. Insbesondere ist durch die Positionsregelungen sowohl eine definierte Flüssigkernreduzierung möglich als auch eine definierte Bombierung einstellbar. Die Reduktion der Strangdicke während der Erstarrung des Metallbandes 4 kann bis zu 60% betragen.If the metal strip 4 has not yet solidified, that is one Has liquid core 4 ', the adjusting device is position-controlled operated and the hydraulic cushion 8 position-controlled set. Due to the ferrostatic pressure caused by the Liquid core 4 'is conditional, the metal strip 4 thus adapts to the set roller gap 3. In particular, through the position regulations both a defined liquid core reduction possible as well as a defined crowning adjustable. The reduction the strand thickness during the solidification of the metal strip 4 can up to 60%.

Wenn das Metallband 4 durcherstarrt ist, also keinen Flüssigkern 4' mehr aufweist, wird die Einstelleinrichtung vorzugsweise druckgeregelt betrieben. Auch das hydraulische Kissen 8 wird in diesem Fall vorzugsweise druckgeregelt eingestellt. Denn dadurch paßt sich der Rollenspalt 3 dem nunmehr starren Metallband 4 an. Das Weiterdrehen der Führungsrollen ist somit sichergestellt. Falls eine sogenannte Weichreduzierung gewünscht sein sollte, kann dies durch Vorgabe entsprechend hoher Drucksollwerte erreicht werden.If the metal strip 4 has solidified, that is, no liquid core 4 'more, the setting device is preferably pressure-controlled operated. The hydraulic cushion 8 is also in this case preferably set pressure-controlled. Because that fits Roller gap 3 to the now rigid metal strip 4. The turning on the guide rollers are thus ensured. If a so-called Soft reduction should be desired, this can be done by default correspondingly high pressure setpoints can be achieved.

Die in Fig. 1 untere Quertraverse 6' weist eine Befestigungsvorrichtung 13 auf. Die Befestigungsvorrichtung 13 ist bezüglich der Quertraverse 6' zentrisch angeordnet. Mittels der Befestigungsvorrichtung 13 ist die Quertraverse 6' und mit ihr die Rahmen 5, 6 mit einer Basissegmentführung 14 verbunden. Die Befestigungsvorrichtung 13 kann hydraulisch oder mechanisch arbeiten. Die so fixierte Quertraverse 6' des Rahmens 6 kann sich daher - z.B. bei thermischer Erwärmung -symmetrisch ausdehnen. Hierdurch werden mechanische Verspannungen vermieden.The lower cross member 6 'in FIG. 1 has a fastening device 13 on. The fastening device 13 is relative to the Crossbar 6 'arranged centrally. By means of the fastening device 13 is the crossbar 6 'and with it the frame 5, 6 with a base segment guide 14 connected. The fastening device 13 can work hydraulically or mechanically. The so fixed Crossbeam 6 'of the frame 6 can therefore - e.g. with thermal Extend warming symmetrically. This makes mechanical Tensions avoided.

Die Führungsrollen 1, 2 können, wie in den Fig. 2 und 3 dargestellt, auch als durchgehende Führungsrollen 1, 2 ausgebildet sein. In diesem Fall wirkt die entsprechende Hydraulikzylindereinheit 11, 12 über mindestens eine Stützrolle 15, 16 auf die jeweilige Führungsrolle 1, 2 ein.The guide rollers 1, 2 can, as shown in FIGS. 2 and 3, also be designed as continuous guide rollers 1, 2. In in this case the corresponding hydraulic cylinder unit 11 acts, 12 via at least one support roller 15, 16 onto the respective guide roller 1, 2 a.

Wenn, wie im Fall der oberen Führungsrolle 1, die Stützrolle 15 die einzige Stützrolle ist, die auf die Führungsrolle 1 einwirkt, ist vorzugsweise die Stützrolle 15 um einen Stützwinkel α gegenüber der jeweiligen Führungsrolle 1 verdreht. Der Stützwinkel α sollte im Bereich bis zu maximal 10° liegen.If, as in the case of the upper guide roller 1, the support roller 15 is the only support roller which acts on the guide roller 1 preferably the support roller 15 by a support angle α compared to respective guide roller 1 rotated. The support angle α should Range up to a maximum of 10 °.

Wenn die Einstelleinrichtung, wie im Fall der unteren Führungsrolle 2, auch über eine Zusatzstützrolle 17 auf die jeweilige Führungsrolle 2 einwirkt, ist ein Verdrehen der Stützrolle 16 und der Zusatzstützrolle 17 nicht erforderlich. Denn in diesem Fall kann bspw. die Stützrolle 16 in Strangführungsrichtung x gesehen oberhalb der Führungsrolle 2 angeordnet sein, während die Zusatzstützrolle 17 unterhalb der Führungsrolle 2 angeordnet ist. If the adjustment device, as in the case of the lower guide roller 2, also via an additional support roller 17 on the respective guide roller 2 acts, is a rotation of the support roller 16 and Additional support roller 17 is not required. Because in this case can For example, the support roller 16 seen in the strand guide direction x above the guide roller 2 may be arranged while the additional support roller 17 is arranged below the guide roller 2.

BezugszeichenlisteReference list

1, 21, 2
FührungsrollenLeadership roles
33rd
RollenspaltRoller gap
44th
MetallbandMetal strap
4'4 '
FlüssigkernLiquid core
5, 65, 6
Rahmenframe
5', 6'5 ', 6'
QuertraversenCrossbeams
77
ZugankerTie rod
88th
hydraulisches Kissenhydraulic cushion
9, 109, 10
MittenlagerungMiddle storage
11, 1211, 12
HydraulikzylindereinheitenHydraulic cylinder units
1313
BefestigungsvorrichtungFastening device
1414
BasissegmentführungBasic segment management
15, 16, 1715, 16, 17
StützrollenSupport rollers
αα
StützwinkelSupport angle
xx
StrangführungsrichtungStrand guidance direction

Claims (11)

Führungselement einer Stranggießanlage, insbesondere einer Dünnbrammenstranggießanlage, zum Führen eines Metallbandes (4) in einer Strangführungsrichtung (x), mit mindestens einem Paar sich bezüglich des Metallbandes (4) gegenüberliegender Führungsrollen (1, 2), die einen Rollenspalt (3) bilden,
dadurch gekennzeichnet,
daß dem Paar von Führungsrollen (1, 2) eine Einstelleinrichtung (11, 12) zum Einstellen einer Bombierung des Rollenspaltes (3) zugeordnet ist.Guide element of a continuous caster, in particular a thin slab caster, for guiding a metal strip (4) in a strand guide direction (x), with at least one pair of guide rollers (1, 2) opposite one another with respect to the metal strip (4), which form a roller gap (3),
characterized,
that the pair of guide rollers (1, 2) is assigned an adjusting device (11, 12) for adjusting a crowning of the roller gap (3). Führungselement nach Anspruch 1,
dadurch gekennzeichnet,
daß die Einstelleinrichtung (11, 12) sowohl druck- als auch positionsgesteuert bzw. -geregelt betreibbar ist.Guide element according to claim 1,
characterized,
that the setting device (11, 12) can be operated both in a pressure-controlled and position-controlled manner. Führungselement nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß mindestens eine der Führungsrollen (1, 2) eine Mittenlagerung (9, 10) aufweist und daß die Einstelleinrichtung (11, 12) auf die Mittenlagerung (9, 10) einwirkt. Guide element according to claim 1 or 2,
characterized,
that at least one of the guide rollers (1, 2) has a central bearing (9, 10) and that the adjusting device (11, 12) acts on the central bearing (9, 10). Führungselement nach Anspruch 3,
dadurch gekennzeichnet,
daß die mindestens eine Führungsrolle (1, 2) als geteilte Führungsrolle (1, 2) ausgebildet ist.Guide element according to claim 3,
characterized,
that the at least one guide roller (1, 2) is designed as a split guide roller (1, 2). Führungselement nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß mindestens eine der Führungsrollen (1, 2) als durchgehende Führungsrolle (1, 2) ausgebildet ist und daß die Einstelleinrichtung (11, 12) über mindestens eine Stützrolle (15, 16) auf die mindestens eine Führungsrolle (1, 2) einwirkt.Guide element according to claim 1 or 2,
characterized,
that at least one of the guide rollers (1, 2) is designed as a continuous guide roller (1, 2) and that the adjusting device (11, 12) acts on the at least one guide roller (1, 2) via at least one support roller (15, 16). Führungselement nach Anspruch 5,
dadurch gekennzeichnet,
daß die mindestens eine Stützrolle (15) gegenüber der mindestens einen Führungsrolle (1) um einen von Null verschiedenen Stützwinkel(α)verdreht ist.Guide element according to claim 5,
characterized,
that the at least one support roller (15) is rotated relative to the at least one guide roller (1) by a non-zero support angle (α). Führungselement nach Anspruch 5,
dadurch gekennzeichnet, daß die Einstelleinrichtung (12) auch über eine Zusatzstützrolle (17) auf die mindestens eine Führungsrolle (2) einwirkt, daß die Stützrolle (16) in Strangführungsrichtung (x) gesehen oberhalb der mindestens einen Führungsrolle (2) angeordnet ist und daß die Zusatzstützrolle (17) in Strangführungsrichtung (x) gesehen unterhalb der mindestens einen Führungsrolle (2) angeordnet ist. Guide element according to claim 5,
characterized, that the adjusting device (12) also acts on the at least one guide roller (2) via an additional support roller (17), that the support roller (16) in the strand guide direction (x) is arranged above the at least one guide roller (2) and that the additional support roller (17) in the strand guide direction (x) is arranged below the at least one guide roller (2). Führungselement nach einem der obigen Ansprüche,
dadurch gekennzeichnet,
daß die Führungsrollen (1, 2) und die Einstelleinrichtungen (11,12) in zug- und druckbelastbaren Rahmen (5, 6) gelagert sind und daß die Rahmen (5, 6) einstellbar relativ zueinander verspannt sind.Guide element according to one of the above claims,
characterized,
that the guide rollers (1, 2) and the adjusting devices (11, 12) are mounted in frames (5, 6) which can be subjected to tensile and compressive loads and that the frames (5, 6) are clamped in an adjustable manner relative to one another. Führungselement nach Anspruch 8,
dadurch gekennzeichnet,
daß mindestens einer der Rahmen (6) eine Quertraverse (6') aufweist, mittels derer er über eine zentrisch bezüglich der Quertraverse (6') angeordnete Befestigungsvorrichtung (13) mit einer Basissegmentführung (14) verbunden ist.Guide element according to claim 8,
characterized,
that at least one of the frames (6) has a crossbar (6 '), by means of which it is connected to a base segment guide (14) via a fastening device (13) arranged centrally with respect to the crossbar (6'). Führungselement nach Anspruch 8 oder 9,
dadurch gekennzeichnet,
daß die Rahmen (5, 6) mittels eines hydraulischen Kissens (8) relativ zueinander einstellbar sind.Guide element according to claim 8 or 9,
characterized,
that the frames (5, 6) can be adjusted relative to one another by means of a hydraulic cushion (8). Führungselement nach Anspruch 10,
dadurch gekennzeichnet,
daß das hydraulische Kissen (8) sowohl druck- als auch positionsgesteuert bzw. -geregelt einstellbar ist.Guide element according to claim 10,
characterized,
that the hydraulic cushion (8) is adjustable both pressure and position controlled.
EP99103619A 1998-03-09 1999-02-25 Supporting element for continuous casting plant Expired - Lifetime EP0941787B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19809811 1998-03-09
DE19809811 1998-03-09
DE19841841 1998-09-12
DE19841841A DE19841841C2 (en) 1998-03-09 1998-09-12 Guide element of a continuous caster

Publications (2)

Publication Number Publication Date
EP0941787A1 true EP0941787A1 (en) 1999-09-15
EP0941787B1 EP0941787B1 (en) 2005-09-28

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ID=26044434

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Country Status (4)

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EP (1) EP0941787B1 (en)
JP (1) JPH11314143A (en)
AT (1) ATE305348T1 (en)
DE (1) DE59912592D1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002013994A1 (en) * 2000-08-17 2002-02-21 Sms Demag Aktiengesellschaft Device for continuously casting metals, especially steel
WO2009118222A1 (en) * 2008-03-28 2009-10-01 Siemens Vai Metals Technologies Gmbh & Co Strand guide segment
AT506824B1 (en) * 2008-05-26 2013-01-15 Siemens Vai Metals Tech Gmbh MORE STRAND CASTING

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100596474B1 (en) 2004-09-07 2006-07-03 주식회사 포스코 Pinch roll girder of continuous caster
DE102007045201A1 (en) 2007-08-04 2009-02-05 Sms Demag Ag Method for influencing the gap geometry of a strand guide in a continuous casting installation comprises shifting the center of a strand guide roll by an amount in the strand direction in the region of the final solidification of the strand

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
WO2002013994A1 (en) * 2000-08-17 2002-02-21 Sms Demag Aktiengesellschaft Device for continuously casting metals, especially steel
US6913065B2 (en) 2000-08-17 2005-07-05 Sms Demag Ag Device for continuously casting metals, especially steel
WO2009118222A1 (en) * 2008-03-28 2009-10-01 Siemens Vai Metals Technologies Gmbh & Co Strand guide segment
AT506824B1 (en) * 2008-05-26 2013-01-15 Siemens Vai Metals Tech Gmbh MORE STRAND CASTING

Also Published As

Publication number Publication date
JPH11314143A (en) 1999-11-16
DE59912592D1 (en) 2006-02-09
EP0941787B1 (en) 2005-09-28
ATE305348T1 (en) 2005-10-15

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