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EP1917115B1 - Method and device for positioning at least one roll segment of a strand guiding unit against a strand - Google Patents

Method and device for positioning at least one roll segment of a strand guiding unit against a strand Download PDF

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Publication number
EP1917115B1
EP1917115B1 EP06828830A EP06828830A EP1917115B1 EP 1917115 B1 EP1917115 B1 EP 1917115B1 EP 06828830 A EP06828830 A EP 06828830A EP 06828830 A EP06828830 A EP 06828830A EP 1917115 B1 EP1917115 B1 EP 1917115B1
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EP
European Patent Office
Prior art keywords
strip
roller
strand
guide device
heights
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.)
Active
Application number
EP06828830A
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German (de)
French (fr)
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EP1917115B2 (en
EP1917115A1 (en
Inventor
Axel Weyer
Christian Stolp
Hans Esau Klassen
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SMS Group GmbH
Original Assignee
SMS Demag AG
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Publication of EP1917115B1 publication Critical patent/EP1917115B1/en
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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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
    • 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
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/58—Roll-force control; Roll-gap control
    • B21B37/62—Roll-force control; Roll-gap control by control of a hydraulic adjusting device
    • 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
    • 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
    • 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
    • B22D11/208—Controlling or regulating processes or operations for removing cast stock for aligning the guide rolls

Definitions

  • the invention relates to a method for hiring at least one roller segment of a strand guiding device of a slab plant to a strand and a computer program and a strand guiding device for carrying out this method.
  • EP 1 475 169 A1 is a support roll stand for continuous casting with roll segments known.
  • the roller segments each consist of a subframe and an upper frame, which are individually adjustable by means of pairs of piston-cylinder units.
  • the piston-cylinder units associated sensors, position sensor, pressure transducer, control valve blocks and the like are connected to a remote control of the continuous casting.
  • a field bus system or a transmitting and receiving module for a bidirectional data transfer of the sensors with the control of the continuous casting is provided on the upper frame.
  • the Japanese publication JP 111 29003 discloses a method and associated apparatus for easily rolling steel bar stock of wedge-shaped section.
  • WO 99/46071 discloses a method and apparatus for employing at least one roller segment a strand guiding device to a strand, wherein the roller segment comprises an upper and a lower roller carrier, each carrying at least one roller for guiding the strand between the rollers.
  • the roller segment has in its four corner regions each have a positioning element for hiring the upper and lower roller carrier relative to each other.
  • the trained hydraulic cylinder units positioning elements are both position and pressure adjustable.
  • All four adjusting elements of the roller segment are synchronously, ie driven at the same time and the values for the jobs to be adjusted to the hydraulic cylinder units are determined by a control device independently. So it is possible that each hydraulic cylinder is basically controlled independently. For the hydraulic cylinder positions are initially given, ie they are basically position-controlled and only when the pressure in the respective hydraulic cylinders has reached or exceeded a predetermined pressure threshold is switched to a pressure-controlled operation for controlling the hydraulic cylinder.
  • the present invention seeks to develop a known method for hiring a roller segment in a strand guide device to a strand to the effect that the strand guiding device downstream rolling stands in view of the tasks imposed on them and with regard to their mechanical stress during their operations and that the quality of the strand is improved.
  • This object is achieved by the method claimed in claim 1.
  • This method is characterized, the actual profile of the strand including the heights of the right and left side edge of the strand detected and with a desired profile containing a predetermined same desired height for the right and left side edge is compared and the individual adjusting elements of the roller segment are individually controlled in accordance with the resulting from the comparison error such that the actual profile is adapted to the desired profile, including a balance of the heights of the right and left side edge of the strand.
  • the invention ensures in an advantageous manner that any existing wedging of the profile of the cast strand, even in the strand guide device, ie even before entering the downstream rolling stands is compensated. Ideally, it is thus ensured by the present invention that the rolling stands only one strand is supplied without wedging. The rolling stands are relieved in this way, both mechanically and in view of the task which you have previously to do to remedy any possible wedging of the strand; In addition, the quality of the strand is ultimately improved.
  • the elimination of the eventual wedging in the strand guiding device takes place at a position or at roller segments in which the strand has not yet solidified.
  • This has the advantage that significantly lower forces must then be exerted on the strand from the rolls of the roll segments to correct the wedging, as if the strand were already solidified, as is generally the case when entering the downstream roll stands.
  • the individual adjustment of the adjusting elements for the purpose of eliminating the wedging can take place either only in individual, in several or even in all roller segments of the strand guiding device.
  • employment of the adjusting elements in several roller segments requires a technically greater effort, but has the advantage that then only smaller forces must be expended at the individual Anstellelementen; This is especially true because then a large number of Anstellelementen in several roles segments are available to compensate for the wedging in total.
  • the hiring of the Anstellelemente to compensate for the wedging can be done either in the form of a controller or a scheme.
  • a control only an equal desired height for the right and left side boundary of the strand is specified and the Anstellelemente on the right and left side of the roller segment (as seen in the material flow direction) are driven accordingly.
  • the heights of the right and left side edges of the strand are detected and compared to determine a corresponding deviation in each case with a predetermined same nominal height for the right and left side edge.
  • the individual adjusting elements of the roller segment are then individually controlled in accordance with the deviation so that the heights of the right and left side edge of the strand are each rolled to the predetermined same desired height.
  • the detection of the heights of the side edges of the strand or the detection of the actual profile of the strand can be carried out at different locations within the strand guiding device.
  • the detection takes place at the output of such a roller segment, which has controllable Anstellelemente.
  • the measured value is recorded at the output of the last roll segment of the strand guiding device, d. H. shortly before entering the rolling stand. Because with each regulation according to the invention, a reduction of the above-mentioned control deviations is aimed at zero, it is then ensured in this way that actually only one strand with equal side edges is fed to the downstream rolling stand.
  • any differences in the heights of the side edges of the cast strand are calculated on the basis of measured force and / or pressure conditions, preferably in the engagement region of the setting elements.
  • the actual profile of the strand z. B. using suitable profile detection devices z. B. be detected optically.
  • the above object is further achieved by a computer program and a strand guiding device for carrying out said method solved.
  • the advantages of the computer program and the strand guiding device essentially correspond to the advantages mentioned above with reference to the claimed method.
  • Each roller carrier serves to carry at least one roller for guiding the strand after leaving the casting device between the roles.
  • At least one role segment in FIG. 1 if there are three, has a plurality of Anstellelemente 121 - 124 for hiring the upper and lower roller carrier 112, 114 relative to each other; see also FIG. 2 .
  • the strand guide device 100 comprises a device 130 for driving the individual Anstellelemente the roller carrier so that the right and left side edge of the strand 200 are the same height.
  • the device 130 may be designed either as a control device or as a control device. If it is merely designed as a control device, it gives each z. B. position values for the individual Anstellelemente before so that the right and left side edge of the strand is rolled in each case to the same height. The specification of the positions is then preferably in each case such that the right and left side edges of the strand are each rolled to an identical predetermined desired height.
  • the device 130 When the device 130 is designed as a control device, it receives either measured heights for the right and left side edges of the strand or data representing an actual profile, ie an actual cross-section of the strand. The heights of the right and left side edge of the strand can z. B. are provided by suitable measuring devices, which, for. B.
  • the detection of the profile of the strand can, for. B. by a suitable optical profile detection device 140; this is preferably as in FIG. 1 shown, arranged at the end of the strand guide device 100.
  • the device 130 embodied as a regulating device is capable of receiving the received measured data, be it the current heights of the lateral edges or the current actual profile of the strand, and respectively this data for the purpose of determining a control deviation with correspondingly predetermined desired variables, ie either a predetermined for the right and left side edge of the strand predetermined height H should or to compare with a desired profile.
  • the control device then controls the individual Anstellelemente of the roller segment in accordance with the determined control deviation so that the control deviation becomes as zero as possible. In this way it is then ensured that any wedging previously present in the transverse direction of the strand, ie in the direction of its width, is compensated before entry of the strand into a downstream rolling stand.
  • FIG. 2 shows an elevational view of the roll segment typically used to implement the invention.
  • the strand 200 in the direction of material flow is guided between the rollers 116, 118 of the roller segment.
  • the roller segment in its four corner regions each having a positioning element, each of these Anstellelemente equally attacks on both roller carriers and thus causes a movement of the upper and lower roller carrier 114, 112 relative to each other.
  • Anstellelemente 121 - 124 are formed as hydraulic cylinders.
  • FIG. 2 indicated by reference numeral 150 measuring devices in the individual Anstellelementen, which serve to detect the above-mentioned force or pressure conditions between the roller carriers 112, 114 of the roller segment.
  • FIG. 3 shows a cross section of the FIG. 2 known role segment, again with the same elements are designated by the same reference numerals. Especially good are in FIG. 3 to detect the significant heights Hr and Hl the right and left side edge of the strand 200 for the invention. Furthermore, in FIG. 3 to recognize that the strand is not completely cured when passing through the roller segment 110, which is indicated by the still liquid part of the strand, which is denoted by the reference numeral 210. This provides for the present invention has the advantage that the applied forces to compensate for the heights Hr and Hl the right and left side edge of the strand are still relatively low, ie are less than if the strand 200 would be completely solidified.
  • FIG. 4a shows an example of a detected unwanted wedging in a strand 200, that is, that in this strand 200, the heights Hr and Hl of the right and left side edges are formed unequal high. According to the invention, the detection of such a situation would trigger a control or regulation to compensate for the heights on the left and right sides of the strand.
  • FIG. 4b finally shows the same strand as FIG. 4a ,
  • the invention done balancing the heights of the right and left side edge of the strand.

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

Abstract

The setting process is for a guide device (100) including a roller segment (110-1) with lower and upper roller carriers (112-1, 114-1) each carrying a roller to guide the continuous casting (200) between the rollers. The setting elements are individually controlled so that the heights of the right and left side edges are kept equal to each other.

Description

Die Erfindung betrifft ein Verfahren zum Anstellen von mindestens einem Rollensegment einer Strangführungseinrichtung einer Brammenanlage an einen Strang sowie ein Computerprogramm und eine Strangführungseinrichtung zum Durchführen dieses Verfahrens.The invention relates to a method for hiring at least one roller segment of a strand guiding device of a slab plant to a strand and a computer program and a strand guiding device for carrying out this method.

Aus dem Stand der Technik sind derartige Verfahren und Vorrichtungen grundsätzlich bekannt.From the prior art, such methods and devices are basically known.

Aus der europäischen Patentanmeldung EP 1 475 169 A1 ist ein Stützrollengerüst für Stranggießmaschinen mit Rollensegmenten bekannt. Die Rollensegmente bestehen jeweils aus einem Unterrahmen und einem Oberrahmen, welche mittels Paaren von Kolben-Zylinder-Einheiten individuell gegeneinander anstellbar sind. Den Kolben-Zylinder-Einheiten zugeordnete Sensoren, Positionsgeber, Druckgeber, Regelventilblöcke und dergleichen sind mit einer entfernt angeordneten Steuerung der Stranggießanlage verbunden. Um die Verkabelung der Sensoren zu reduzieren, wird vorgeschlagen, dass jeweils auf dem Oberrahmen entweder ein Feldbussystem oder ein Sende- und Empfangsmodul für einen bidirektionalen Datentransfer der Sensoren mit der Steuerung der Stranggießanlage vorgesehen ist.From the European patent application EP 1 475 169 A1 is a support roll stand for continuous casting with roll segments known. The roller segments each consist of a subframe and an upper frame, which are individually adjustable by means of pairs of piston-cylinder units. The piston-cylinder units associated sensors, position sensor, pressure transducer, control valve blocks and the like are connected to a remote control of the continuous casting. In order to reduce the wiring of the sensors, it is proposed that either a field bus system or a transmitting and receiving module for a bidirectional data transfer of the sensors with the control of the continuous casting is provided on the upper frame.

Die japanische Druckschrift JP 111 29003 offenbart ein Verfahren und eine zugehörige Vorrichtung zum einfachen Walzen von Stangenmaterial aus Stahl mit keilförmigem Querschnitt.The Japanese publication JP 111 29003 discloses a method and associated apparatus for easily rolling steel bar stock of wedge-shaped section.

In der internationalen Patentanmeldung WO 99/46071 wird ein Verfahren und eine Vorrichtung offenbart zum Anstellen von mindestens einem Rollensegment einer Strangführungseinrichtung an einen Strang, wobei das Rollensegment einen oberen und einen unteren Rollenträger aufweist, die jeweils mindestens eine Rolle tragen zum Führen des Strangs zwischen den Rollen. Das Rollensegment weist in seinen vier Eckbereichen jeweils ein Anstellelement auf zum Anstellen des oberen und des unteren Rollenträgers relativ zueinander. Um Beschädigungen des Rollensegmentes durch übermäßige Krafteinwirkung der Anstellelemente auf die Rollenträger bzw. die von den Rollenträgern getragenen Rollen zu vermeiden, wird in der besagten internationalen Patentanmeldung vorgeschlagen, dass die als Hydraulikzylindereinheiten ausgebildeten Anstellelemente sowohl positions- als auch druckgeregelt anstellbar sind. Alle vier Anstellelemente des Rollensegmentes werden synchron, d. h. zeitgleich angesteuert und die Werte für die Anstellungen, auf die Hydraulikzylindereinheiten eingestellt werden, werden von einer Regelungseinrichtung unabhängig voneinander ermittelt. So ist es möglich, dass jeder Hydraulikzylinder grundsätzlich unabhängig voneinander geregelt wird. Für die Hydraulikzylinder werden zunächst Positionen vorgegeben, d. h. sie werden grundsätzlich positionsgeregelt und erst dann, wenn der Druck in den jeweiligen Hydraulikzylindern einen vorgegebenen Druckschwellenwert erreicht bzw. überschritten hat, wird auf einen druckgeregelten Betrieb zur Ansteuerung der Hydraulikzylinder umgeschaltet.In the international patent application WO 99/46071 discloses a method and apparatus for employing at least one roller segment a strand guiding device to a strand, wherein the roller segment comprises an upper and a lower roller carrier, each carrying at least one roller for guiding the strand between the rollers. The roller segment has in its four corner regions each have a positioning element for hiring the upper and lower roller carrier relative to each other. In order to avoid damage to the roller segment by excessive force of the Anstellelemente on the roller carrier or carried by the roller carriers roles, is proposed in the said international patent application that the trained hydraulic cylinder units positioning elements are both position and pressure adjustable. All four adjusting elements of the roller segment are synchronously, ie driven at the same time and the values for the jobs to be adjusted to the hydraulic cylinder units are determined by a control device independently. So it is possible that each hydraulic cylinder is basically controlled independently. For the hydraulic cylinder positions are initially given, ie they are basically position-controlled and only when the pressure in the respective hydraulic cylinders has reached or exceeded a predetermined pressure threshold is switched to a pressure-controlled operation for controlling the hydraulic cylinder.

Ausgehend von diesem Stand der Technik liegt der Erfindung die Aufgabe zugrunde, ein bekanntes Verfahren zum Anstellen eines Rollensegmentes in einer Strangführungseinrichtung an einen Strang dahingehend weiterzubilden, dass der Strangführungseinrichtung nachgeschaltete Walzgerüste im Hinblick auf die an sie gestellten Aufgaben und im Hinblick auf ihre mechanische Belastung während ihres Betriebs entlastet werden und dass die Qualität des Strangs verbessert wird.Based on this prior art, the present invention seeks to develop a known method for hiring a roller segment in a strand guide device to a strand to the effect that the strand guiding device downstream rolling stands in view of the tasks imposed on them and with regard to their mechanical stress during their operations and that the quality of the strand is improved.

Diese Aufgabe wird durch das im Patentanspruch 1 beanspruchte Verfahren gelöst. Dieses Verfahren ist dadurch gekennzeichnet, das Ist-Profil des Strangs inklusive der Höhen der rechten und linken Seitenkante des Strangs erfasst und mit einem Soll-Profil enthaltend eine vorgegebene gleiche Sollhöhe für die rechte und linke Seitenkante verglichen wird und die einzelnen Anstellelemente des Rollensegmentes nach Maßgabe der aus dem Vergleich resultierenden Regelabweichung individuell so angesteuert werden, dass das Ist-Profil an das Soll-Profil angepasst wird, inklusive eines Ausgleichs der Höhen der rechten und linken Seitenkante des Strangs.This object is achieved by the method claimed in claim 1. This method is characterized, the actual profile of the strand including the heights of the right and left side edge of the strand detected and with a desired profile containing a predetermined same desired height for the right and left side edge is compared and the individual adjusting elements of the roller segment are individually controlled in accordance with the resulting from the comparison error such that the actual profile is adapted to the desired profile, including a balance of the heights of the right and left side edge of the strand.

Traditionell war es die Aufgabe der der Strangführungseinrichtung nachgeschalteteten Walzgerüste, eine eventuell in einem zugeführten Strang vorhandene unerwünschte Keiligkeit im Profil des Strangs, d. h. ungleich hohe Seitenränder des Strangs auszugleichen. Dies führte jedoch zu einer unerwünschten ungleichmäßigen mechanischen Belastung der Walzen im Walzgerüst über ihre jeweilige Walzenbreite und damit zu einer unerwünschten ungleichmäßigen Abnutzung der Walzen. Durch die Erfindung wird in vorteilhafter Weise sichergestellt, dass eine eventuell vorhandene Keiligkeit des Profils des gegossenen Strangs, bereits in der Strangführungseinrichtung, d. h. also noch vor Eintritt in die nachgeschalteten Walzgerüste ausgeglichen wird. Idealerweise wird somit durch die vorliegende Erfindung sichergestellt, dass den Walzgerüsten nur ein Strang ohne Keiligkeit zugeführt wird. Die Walzgerüste werden auf diese Weise sowohl mechanisch wie auch im Hinblick auf die von Ihnen früher zu erfüllende Aufgabe der Behebung einer eventuellen Keiligkeit des Strangs entlastet; außerdem wird die Qualität des Strangs so letztendlich verbessert.Traditionally, it was the task of the strand guide device downstream rolling mills, an existing possibly in a supplied strand undesirable wedging in the profile of the strand, ie compensate for unequal high side edges of the strand. However, this led to an undesirable non-uniform mechanical loading of the rolls in the rolling stand over their respective roll width and thus to an undesirable non-uniform wear of the rolls. The invention ensures in an advantageous manner that any existing wedging of the profile of the cast strand, even in the strand guide device, ie even before entering the downstream rolling stands is compensated. Ideally, it is thus ensured by the present invention that the rolling stands only one strand is supplied without wedging. The rolling stands are relieved in this way, both mechanically and in view of the task which you have previously to do to remedy any possible wedging of the strand; In addition, the quality of the strand is ultimately improved.

Gemäß einem ersten Ausführungsbeispiel erfolgt die Behebung der eventuellen Keiligkeit in der Strangführungseinrichtung an einer Position bzw. an Rollensegmenten, bei denen der Strang noch nicht durcherstarrt ist. Dies hat den Vorteil, dass dann zur Behebung der Keiligkeit wesentlich geringere Kräfte von den Rollen der Rollensegmente auf den Strang ausgeübt werden müssen, als wenn der Strang bereits durcherstarrt wäre, wie dies in der Regel bei Eintritt in die nachgeschalteten Walzgerüste der Fall ist.According to a first embodiment, the elimination of the eventual wedging in the strand guiding device takes place at a position or at roller segments in which the strand has not yet solidified. This has the advantage that significantly lower forces must then be exerted on the strand from the rolls of the roll segments to correct the wedging, as if the strand were already solidified, as is generally the case when entering the downstream roll stands.

Vorteilhafterweise kann das individuelle Anstellen der Anstellelemente zwecks Behebung der Keiligkeit entweder nur bei einzelnen, bei mehreren oder auch bei allen Rollensegmenten der Strangführungseinrichtung erfolgen. Eine Anstellung der Anstellelemente bei mehreren Rollensegmenten erfordert zwar einen technisch größeren Aufwand, hat jedoch den Vorteil, dass dann bei den einzelnen Anstellelementen lediglich geringere Kräfte aufgewandt werden müssen; dies gilt insbesondere deswegen, weil dann eine Vielzahl von Anstellelementen bei mehreren Rollensegmenten bereitstehen, um die Keiligkeit insgesamt auszugleichen.Advantageously, the individual adjustment of the adjusting elements for the purpose of eliminating the wedging can take place either only in individual, in several or even in all roller segments of the strand guiding device. Although employment of the adjusting elements in several roller segments requires a technically greater effort, but has the advantage that then only smaller forces must be expended at the individual Anstellelementen; This is especially true because then a large number of Anstellelementen in several roles segments are available to compensate for the wedging in total.

Das Anstellen der Anstellelemente zum Ausgleich der Keiligkeit kann entweder in Form einer Steuerung oder einer Regelung erfolgen. Bei einer Steuerung wird lediglich eine gleiche Sollhöhe für die rechte und linke Seitengrenze des Strangs vorgegeben und die Anstellelemente auf der rechten und linken Seite des Rollensegmentes (in Materialflussrichtung gesehen) werden entsprechend angesteuert. Im Falle einer Regelung werden die Höhen der rechten und linken Seitenkante des Strangs erfasst und zur Bestimmung einer entsprechenden Regelabweichung jeweils mit einer vorgegebenen gleichen Sollhöhe für die rechte und linke Seitenkante verglichen. Die einzelnen Anstellelemente des Rollensegmentes werden dann nach Maßgabe der Regelabweichung individuell so angesteuert, dass die Höhen der rechten und linken Seitenkante des Strangs jeweils auf die vorgegebene gleiche Sollhöhe gewalzt werden.The hiring of the Anstellelemente to compensate for the wedging can be done either in the form of a controller or a scheme. In a control, only an equal desired height for the right and left side boundary of the strand is specified and the Anstellelemente on the right and left side of the roller segment (as seen in the material flow direction) are driven accordingly. In the case of a control, the heights of the right and left side edges of the strand are detected and compared to determine a corresponding deviation in each case with a predetermined same nominal height for the right and left side edge. The individual adjusting elements of the roller segment are then individually controlled in accordance with the deviation so that the heights of the right and left side edge of the strand are each rolled to the predetermined same desired height.

Alternativ zu der reinen Regelung der Höhen auf der rechten und linken Seitenkante des Strangs besteht auch die Möglichkeit, eine Profilregelung für das Profil, d. h. den Querschnitt des Strangs vorzusehen. Dazu wird zunächst das Ist-Profil des Strangs erfasst und mit einem vorgegebenen Soll-Profil zwecks Bestimmung einer Profil-Regelabweichung verglichen. Auch in diesem Fall erfolgt dann das Anstellen der einzelnen Anstellelemente des Rollensegmentes nach Maßgabe der zuvor ermittelten Profil-Regelabweichung zwecks Angleichung des Ist-Profils an das vorgegebene Soll-Profil. Auch diese Profil-Angleichung schließt allerdings einen im Rahmen der vorliegenden Erfindung zwingend notwendigen Ausgleich Höhen der rechten und linken Seitenkante des Strangs mit ein.As an alternative to the pure regulation of the heights on the right and left side edges of the strand, there is also the possibility of a profile control for the profile, d. H. to provide the cross-section of the strand. For this purpose, first the actual profile of the strand is detected and compared with a predetermined desired profile for the purpose of determining a profile deviation. Also in this case, then the hiring the individual Anstellelemente of the roller segment in accordance with the previously determined profile deviation for the purpose of approximation of the actual profile to the predetermined target profile. However, this profile approximation also includes, in the context of the present invention, absolutely necessary compensation of the right and left lateral edges of the strand.

Vorteilhafterweise kann die Erfassung der Höhen der Seitenkanten des Strangs oder die Erfassung des Ist-Profils des Strangs an unterschiedlichen Orten innerhalb der Strangführungseinrichtung erfolgen. Vorzugsweise erfolgt die Erfassung am Ausgang eines solchen Rollensegmentes, welches über regelbare Anstellelemente verfügt. Vorzugsweise erfolgt die Messwerterfassung am Ausgang des letzten Rollensegmentes der Strangführungseinrichtung, d. h. kurz vor Eintritt in das Walzgerüst. Weil mit jeder erfindungsgemäßen Regelung eine Reduzierung der oben erwähnten Regelabweichungen auf Null angestrebt wird, wird dann auf diese Weise sichergestellt, dass auch tatsächlich nur ein Strang mit gleich hohen Seitenkanten dem nachgeschalteten Walzgerüst zugeführt wird.Advantageously, the detection of the heights of the side edges of the strand or the detection of the actual profile of the strand can be carried out at different locations within the strand guiding device. Preferably, the detection takes place at the output of such a roller segment, which has controllable Anstellelemente. Preferably, the measured value is recorded at the output of the last roll segment of the strand guiding device, d. H. shortly before entering the rolling stand. Because with each regulation according to the invention, a reduction of the above-mentioned control deviations is aimed at zero, it is then ensured in this way that actually only one strand with equal side edges is fed to the downstream rolling stand.

Vorteilhafterweise werden eventuelle Unterschiede in den Höhen der Seitenkanten des gegossenen Strangs auf Basis gemessener Kraft- und / oder Druckverhältnisse, vorzugsweise im Angriffsbereich der Anstellelemente berechnet. Demgegenüber kann das Ist-Profil des Strangs z. B. mit Hilfe geeigneter Profilerfassungseinrichtungen z. B. optisch erfasst werden.Advantageously, any differences in the heights of the side edges of the cast strand are calculated on the basis of measured force and / or pressure conditions, preferably in the engagement region of the setting elements. In contrast, the actual profile of the strand z. B. using suitable profile detection devices z. B. be detected optically.

Die oben genannte Aufgabe wird weiterhin durch ein Computerprogramm sowie eine Strangführungseinrichtung zum Durchführen des genannten Verfahrens gelöst. Die Vorteile des Computerprogramms und der Strangführungseinrichtung entsprechen im Wesentlichen den oben mit Bezug auf das beanspruchte Verfahren genannten Vorteilen.The above object is further achieved by a computer program and a strand guiding device for carrying out said method solved. The advantages of the computer program and the strand guiding device essentially correspond to the advantages mentioned above with reference to the claimed method.

Vorteilhafte Ausgestaltungen der Strangführungseinrichtung und insbesondere der Anstellelemente sind Gegenstand der Unteransprüche.Advantageous embodiments of the strand guide device and in particular the Anstellelemente are the subject of the dependent claims.

Der Beschreibung sind insgesamt vier Figuren beigefügt, wobei

Figur 1
eine neue Strangführungseinrichtung gemäß der Erfindung;
Figur 2
eine Aufrissansicht eines Rollensegmentes;
Figur 3
einen Querschnitt durch das Rollensegment;
Figur 4a
einen Strang mit Keiligkeit in dem Rollensegment;
und Figur 4b
einen Strang ohne Keiligkeit zwischen zwei konischen Rollen eines Rollensegmentes
zeigt.The description is a total of four figures attached, wherein
FIG. 1
a new strand guide device according to the invention;
FIG. 2
an elevational view of a roller segment;
FIG. 3
a cross section through the roller segment;
FIG. 4a
a strand with wedging in the roll segment;
and FIG. 4b
a strand without wedging between two conical rollers of a roller segment
shows.

Die Erfindung wird nachfolgend in Form von Ausführungsbeispielen unter Bezugnahme auf die genannten Figuren detailliert beschrieben.The invention will now be described in detail in the form of embodiments with reference to said figures.

Figur 1 zeigt die erfindungsgemäße Strangführungseinrichtung zum Führen eines Strangs 200 nach Verlassen einer Gießeinrichtung 300. Die Strangführungseinrichtung umfasst eine Mehrzahl von Rollensegmenten 110 -n mit n = 1-N, wobei jedes Rollensegment 110 -n jeweils einen oberen und einen unteren Rollenträger 112, 114 aufweist. Jeder Rollenträger dient zum Tragen von mindestens einer Rolle zum Führen des Strangs nach Verlassen der Gießeinrichtung zwischen den Rollen. Zumindest ein Rollensegment, in Figur 1 sind es drei, weist mehrere Anstellelemente 121 - 124 auf zum Anstellen des oberen und unteren Rollenträgers 112, 114 relativ zueinander; siehe auch Figur 2. Weiterhin umfasst die Strangführungseinrichtung 100 eine Einrichtung 130 zum Ansteuern der einzelnen Anstellelemente der Rollenträger so, dass die rechte und linke Seitenkante des Strangs 200 gleich hoch werden. FIG. 1 The strand guiding device comprises a plurality of roller segments 110 -n with n = 1-N, wherein each roller segment 110 -n has an upper and a lower roller carrier 112, 114, respectively. Each roller carrier serves to carry at least one roller for guiding the strand after leaving the casting device between the roles. At least one role segment, in FIG. 1 if there are three, has a plurality of Anstellelemente 121 - 124 for hiring the upper and lower roller carrier 112, 114 relative to each other; see also FIG. 2 , Furthermore, the strand guide device 100 comprises a device 130 for driving the individual Anstellelemente the roller carrier so that the right and left side edge of the strand 200 are the same height.

Die Einrichtung 130 kann entweder als Steuerungseinrichtung oder als Regelungseinrichtung ausgebildet sein. Ist sie lediglich als Steuerungseinrichtung ausgebildet, so gibt sie jeweils z. B. Positionswerte für die einzelnen Anstellelemente so vor, dass die rechte und linke Seitenkante des Strangs jeweils auf die gleiche Höhe gewalzt wird. Vorzugsweise erfolgt die Vorgabe der Positionen dann jeweils so, dass die rechte und linke Seitenkante des Strangs jeweils auf eine gleiche vorgegebene Sollhöhe gewalzt werden. Wenn die Einrichtung 130 als Regelungseinrichtung ausgebildet ist, empfängt sie entweder gemessene Höhen für die rechte und linke Seitenkante des Strangs oder Daten, welche ein Ist-Profil, d. h. einen Ist-Querschnitt des Strangs repräsentieren. Die Höhen der rechten und linken Seitenkante des Strangs können z. B. von geeigneten Messeinrichtungen bereitgestellt werden, welche z. B. in die Anstellelemente integriert sind und dort gegebene Kraft- oder Druckverhältnisse zwischen den beiden Rollenträgern 112, 114 des Rollensegmentes ermitteln und daraus auf die Höhen der rechten und linken Seitenkante des Strangs rückschließen. Die Erfassung des Profils des Strangs kann z. B. durch eine geeignete optische Profilerfassungseinrichtung 140 erfolgen; diese ist vorzugsweise, wie in Figur 1 dargestellt, am Ende der Strangführungseinrichtung 100 angeordnet. Die als Regelungseinrichtung ausgebildete Einrichtung 130 ist in der Lage, die empfangenen Messdaten, sei es die aktuellen Höhen der Seitenkanten oder das aktuelle Ist-Profil des Strangs, zu empfangen und diese Daten jeweils zwecks Ermittlung einer Regelabweichung mit entsprechend vorgegebenen Soll-Größen, d. h. entweder einer einheitlich für die rechte und linke Seitenkante des Strangs vorgegebenen Sollhöhe Hsoll oder mit einem Soll-Profil, zu vergleichen. Die Regelungseinrichtung steuert dann die einzelnen Anstellelemente des Rollensegmentes nach Maßgabe der ermittelten Regelabweichung so an, dass die Regelabweichung möglichst zu Null wird. Auf diese Weise wird dann gewährleistet, dass eine eventuell zuvor in Querrichtung des Strangs, d. h. in Richtung seiner Breite vorhandene Keiligkeit vor Eintritt des Strangs in ein nachgeschaltetes Walzgerüst ausgeglichen ist.The device 130 may be designed either as a control device or as a control device. If it is merely designed as a control device, it gives each z. B. position values for the individual Anstellelemente before so that the right and left side edge of the strand is rolled in each case to the same height. The specification of the positions is then preferably in each case such that the right and left side edges of the strand are each rolled to an identical predetermined desired height. When the device 130 is designed as a control device, it receives either measured heights for the right and left side edges of the strand or data representing an actual profile, ie an actual cross-section of the strand. The heights of the right and left side edge of the strand can z. B. are provided by suitable measuring devices, which, for. B. are integrated into the Anstellelemente and determine there given force or pressure conditions between the two roller carriers 112, 114 of the roller segment and infer therefrom to the heights of the right and left side edge of the strand. The detection of the profile of the strand can, for. B. by a suitable optical profile detection device 140; this is preferably as in FIG. 1 shown, arranged at the end of the strand guide device 100. The device 130 embodied as a regulating device is capable of receiving the received measured data, be it the current heights of the lateral edges or the current actual profile of the strand, and respectively this data for the purpose of determining a control deviation with correspondingly predetermined desired variables, ie either a predetermined for the right and left side edge of the strand predetermined height H should or to compare with a desired profile. The control device then controls the individual Anstellelemente of the roller segment in accordance with the determined control deviation so that the control deviation becomes as zero as possible. In this way it is then ensured that any wedging previously present in the transverse direction of the strand, ie in the direction of its width, is compensated before entry of the strand into a downstream rolling stand.

Figur 2 zeigt eine Aufrissansicht des typischerweise zur Realisierung der Erfindung verwendeten Rollensegmentes. In Figur 2 sind gleiche Elemente wie in Figur 1 mit gleichen Bezugszeichen bezeichnet. Es ist gut zu erkennen, dass der Strang 200 in Materialflussrichtung, angedeutet durch einen horizontalen Pfeil, zwischen den Rollen 116, 118 des Rollensegmentes hindurch geführt wird. Weiterhin ist zu erkennen, dass bei dem hier gezeigten Beispiel das Rollensegment in seinen vier Eckbereichen jeweils ein Anstellelement aufweist, wobei jedes dieser Anstellelemente gleichermaßen an beiden Rollenträgern angreift und so eine Bewegung des oberen und des unteren Rollenträgers 114, 112 relativ zueinander bewirkt. Die in Figur 2 gezeigten Anstellelemente 121 - 124 sind als Hydraulikzylinder ausgebildet. Weiterhin sind in Figur 2 mit dem Bezugszeichen 150 Messeinrichtungen in den einzelnen Anstellelementen angedeutet, welche zum Erfassen der o. g. Kraft- oder Druckverhältnisse zwischen den Rollenträgern 112, 114 des Rollensegmentes dienen. FIG. 2 shows an elevational view of the roll segment typically used to implement the invention. In FIG. 2 are the same elements as in FIG. 1 denoted by the same reference numerals. It can be clearly seen that the strand 200 in the direction of material flow, indicated by a horizontal arrow, is guided between the rollers 116, 118 of the roller segment. Furthermore, it can be seen that in the example shown here, the roller segment in its four corner regions each having a positioning element, each of these Anstellelemente equally attacks on both roller carriers and thus causes a movement of the upper and lower roller carrier 114, 112 relative to each other. In the FIG. 2 shown Anstellelemente 121 - 124 are formed as hydraulic cylinders. Furthermore, in FIG. 2 indicated by reference numeral 150 measuring devices in the individual Anstellelementen, which serve to detect the above-mentioned force or pressure conditions between the roller carriers 112, 114 of the roller segment.

Figur 3 zeigt einen Querschnitt des aus Figur 2 bekannten Rollensegmentes, wobei wiederum gleiche Elemente mit gleichen Bezugszeichen bezeichnet sind. Besonders gut sind in Figur 3 die für die Erfindung wesentlichen Höhen Hr und Hl der rechten und linken Seitenkante des Strangs 200 zu erkennen. Weiterhin ist in Figur 3 zu erkennen, dass der Strang beim Durchlaufen des Rollensegmentes 110 noch nicht vollständig ausgehärtet ist, was durch den noch flüssigen Teil des Strangs, der durch das Bezugszeichen 210 bezeichnet ist, angedeutet ist. Dies bietet für die vorliegende Erfindung den Vorteil, dass die aufzubringenden Kräfte zum Ausgleich der Höhen Hr und Hl der rechten und linken Seitenkante des Strangs noch relativ gering sind, d. h. geringer sind, als wenn der Strang 200 vollständig durcherstarrt wäre. FIG. 3 shows a cross section of the FIG. 2 known role segment, again with the same elements are designated by the same reference numerals. Especially good are in FIG. 3 to detect the significant heights Hr and Hl the right and left side edge of the strand 200 for the invention. Furthermore, in FIG. 3 to recognize that the strand is not completely cured when passing through the roller segment 110, which is indicated by the still liquid part of the strand, which is denoted by the reference numeral 210. This provides for the present invention has the advantage that the applied forces to compensate for the heights Hr and Hl the right and left side edge of the strand are still relatively low, ie are less than if the strand 200 would be completely solidified.

Figur 4a zeigt ein Beispiel für eine erfasste unerwünschte Keiligkeit bei einem Strang 200, d. h. dass bei diesem Strang 200 die Höhen Hr und Hl der rechten und linken Seitenkante ungleich hoch ausgebildet sind. Erfindungsgemäß würde die Erfassung einer solchen Situation eine Steuerung oder Regelung zum Ausgleich der Höhen auf der linken und rechten Seite des Strangs auslösen. FIG. 4a shows an example of a detected unwanted wedging in a strand 200, that is, that in this strand 200, the heights Hr and Hl of the right and left side edges are formed unequal high. According to the invention, the detection of such a situation would trigger a control or regulation to compensate for the heights on the left and right sides of the strand.

Figur 4b zeigt schließlich denselben Strang wie Figur 4a, allerdings nach erfindungsgemäß erfolgtem Ausgleich der Höhen der rechten und linken Seitenkante des Strangs. Eine eventuell vorhandene unsymmetrische Abnutzung der Rollen 116, 118 des Rollensegmentes, die zu einer konischen Ausbildung geführt hat, ist für die Durchführung der vorliegenden Erfindung unerheblich, weil sie durch die beanspruchte individuelle Ansteuerung der Anstellelemente 121 - 124 auf der linken und rechten Seite des Strangs in Materialflussrichtung gesehen ausgeglichen wird. FIG. 4b finally shows the same strand as FIG. 4a , However, according to the invention done balancing the heights of the right and left side edge of the strand. A possibly existing asymmetrical wear of the rollers 116, 118 of the roller segment, which has led to a conical design, is irrelevant for the implementation of the present invention, because they by the claimed individual control of the Anstellelemente 121 - 124 on the left and right side of the strand compensated in material flow direction.

Claims (12)

  1. Method of adjusting at least one roller segment (110) of a strip guide device (100) of a slab casting plant at a strip, wherein the roller segment has an upper and a lower roller carrier (114, 112) which each carry at least one roller (116, 188) for guidance of the strip (200) between the rollers, and wherein at least one respective adjusting element (121-124) for adjustment of the two roller carriers (114, 112) relative to one another is associated with each of the righthand and lefthand sides - as seen in material flow direction - of the roller segment (110), comprising the following step:
    individual drive control of the individual adjusting elements (121-124),
    characterised in that the actual profile of the strip inclusive of the heights (Hr, Hl) of the righthand and lefthand side edge of the strip (200) is detected and compared with a target profile containing a predetermined identical target height (Hsoll) for the righthand and lefthand side edge; and the individual adjusting elements (121-124) of the roller segment (116) are so individually controlled in drive depending on the regulating deviation resulting from the comparison that the actual profile is adapted to the target profile, inclusive of a compensation for the heights of the righthand and lefthand side edges of the strip (200).
  2. Method according to claim 1, characterised in that the adjustment takes place in a region of the strip (200) which is still not hardened through during transit of the roller segment (110).
  3. Method according to any one of the preceding claims, characterised in that the individual adjustment of the adjusting elements (121-124) is carried out at an individual roller segment or several roller segments (110) of the strip guide device (100).
  4. Method according to any one of claims 1 to 3, characterised in that the adaptation of the heights (Hr, Hl) to an identical target height (Hsoll) is carried out in the form of a controlling.
  5. Method according to claim 1, characterised in that the heights (Hr, Hl) of the side edges of the strip or the actual profile thereof at the outlet of the at least one roller segment of the strip guide device (100) is or are detected at least at the outlet of the last roller segment (100-N) of the strip guide device.
  6. Method according to any one of the preceding claims, characterised in that possible differences in the heights (Hr, Hl) of the side edges of the strip (200) are calculated on the basis of measured force and/or pressure relationships in the region of the adjusting elements (121-124).
  7. Computer program with a program code for a regulating device (13) of a strip guide device (100), characterised in that the program code is constructed to cause a drive control of adjusting elements for roller carriers (112, 114) in the strip guide device (100) in correspondence with the method according to any one of claims 1 to 6.
  8. Strip guide device (100) for guidance of a strip (200) after leaving a casting device (300), comprising:
    at least one roller segment (100-n) with an upper and a lower roller carrier (112, 114), wherein the roller carriers each have at least one roller (116, 118) for guidance of the strip (200), after leaving the casting device, between the rollers;
    at least one respective adjusting element (121-124) on the righthand and lefthand sides - as seen in material flow direction - of the roller segment (110) for adjusting the upper and
    lower roller carriers (112, 114) relative to one another; and
    a regulating device (130) for drive control of the adjusting elements (121-124);
    characterised in that a profile detection device (140) is provided for detection of the cross-section of the strip (200) within the strip guide device as an actual profile inclusive of a possible difference between the heights (Hr, Hl) of the righthand and lefthand side edges of the strip; and
    the regulating device (130) is constructed to so control the adjusting elements (121-124) of the roller carriers in drive that the actual profile is adapted to a predetermined target profile with identical heights (Hr, Hl) on the righthand and lefthand side edges of the strip (200).
  9. Strip guide device (100) according to claim 8, characterised in that the device (130) is constructed as a controlling or regulating device in order to so control the individual adjusting elements (121-124) of the roller carriers in drive that the righthand and lefthand side edges of the strip (200) are rolled to the same predetermined target height (Hsoll).
  10. Strip guide device (100) according to claim 8 or 9, characterised in that the roller segment (110) has a respective adjusting element (121-124) in each of its four corner regions.
  11. Strip guide device (100) according to any one of claims 8 to 10, characterised in that the adjusting elements (121-124) are each constructed as a hydraulic cylinder.
  12. Strip guide device (100) according to any one of claims 8 to 11, characterised by a measuring device (150), which is integrated in the adjusting elements (121-124), for detecting force and/or pressure relationships between the two roller carriers (112, 114) of the roller segment.
EP06828830.7A 2005-11-22 2006-10-19 Method and device for positioning at least one roll segment of a strand guiding unit against a strand Active EP1917115B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005055530A DE102005055530A1 (en) 2005-11-22 2005-11-22 Setting process for roller segment in continuous casting machine involves controlling setting elements of roller segments individually to coordinate side edges
PCT/EP2006/010063 WO2007059827A1 (en) 2005-11-22 2006-10-19 Method and device for positioning at least one roll segment of a strand guiding unit against a strand

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EP1917115A1 EP1917115A1 (en) 2008-05-07
EP1917115B1 true EP1917115B1 (en) 2009-06-03
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DE102005055530A1 (en) * 2005-11-22 2007-05-24 Sms Demag Ag Setting process for roller segment in continuous casting machine involves controlling setting elements of roller segments individually to coordinate side edges
WO2009089843A1 (en) * 2008-01-14 2009-07-23 Concast Ag Continuous casting system particularly for long steel products, and a method for continuous casting
CN107116195B (en) * 2017-05-31 2019-01-15 西安交通大学 A kind of dynamic light pressing control method based on flow data
CN110181018B (en) * 2018-05-17 2022-01-14 江阴兴澄特种钢铁有限公司 Continuous casting billet thickness on-line measurement and reduction adjustment system

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DE4138740A1 (en) * 1991-11-26 1993-05-27 Schloemann Siemag Ag METHOD AND DEVICE FOR CONTINUOUSLY casting slabs or blocks
JP3019720B2 (en) * 1994-06-16 2000-03-13 日本鋼管株式会社 Rolling mill with camber straightening function
DE19511113A1 (en) * 1995-03-25 1996-09-26 Schloemann Siemag Ag Strand guidance of a continuous caster for thin slabs
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JP2009516591A (en) 2009-04-23
WO2007059827A1 (en) 2007-05-31
US20110220315A1 (en) 2011-09-15
CN101374617B (en) 2013-07-17
JP5111391B2 (en) 2013-01-09
US8820392B2 (en) 2014-09-02
US20110214835A1 (en) 2011-09-08
DE502006003898D1 (en) 2009-07-16
CN101374617A (en) 2009-02-25
UA88241C2 (en) 2009-09-25
KR20080072729A (en) 2008-08-06
DE102005055530A1 (en) 2007-05-24
EP1917115B2 (en) 2018-03-14
CA2630856A1 (en) 2007-05-31
US8205661B2 (en) 2012-06-26
US20090159232A1 (en) 2009-06-25
EP1917115A1 (en) 2008-05-07
ATE432783T1 (en) 2009-06-15

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