EP1193007A1 - Process and device for determining the position of the crater end in a cast strand during continuous metal casting, especially of steel - Google Patents
Process and device for determining the position of the crater end in a cast strand during continuous metal casting, especially of steel Download PDFInfo
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- EP1193007A1 EP1193007A1 EP01119487A EP01119487A EP1193007A1 EP 1193007 A1 EP1193007 A1 EP 1193007A1 EP 01119487 A EP01119487 A EP 01119487A EP 01119487 A EP01119487 A EP 01119487A EP 1193007 A1 EP1193007 A1 EP 1193007A1
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- final solidification
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 14
- 239000010959 steel Substances 0.000 title claims abstract description 14
- 238000005058 metal casting Methods 0.000 title 1
- 238000007711 solidification Methods 0.000 claims abstract description 36
- 230000008023 solidification Effects 0.000 claims abstract description 36
- 238000005266 casting Methods 0.000 claims abstract description 25
- 238000009749 continuous casting Methods 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- 150000002739 metals Chemical class 0.000 claims abstract description 5
- 239000000498 cooling water Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 description 7
- 238000000605 extraction Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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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
- B22D11/16—Controlling or regulating processes or operations
Definitions
- the invention relates to a method and a device for determining the position the final solidification in the casting strand when continuously casting metals, in particular of steel, in which the casting strand produced in the continuous casting mold is in support segments guided cooled and through the support segments with driven support roller pairs is pulled out.
- JP 7270349; JP 62 148 850 are based on irradiating the Casting strand with gamma rays in an area in which a final solidification of the casting strand cannot be present. The location of the final solidification can therefore can be determined neither exactly nor estimated.
- the position of the final solidification cannot currently be measured directly. It is possible by measuring the locking forces of the support segments (e.g. through Pressure sensors in the hydraulic cylinders) in which support segment final solidification is taking place. With regard to the length of the support segment this procedure is not accurate enough.
- the invention has for its object to determine the position of the final solidification to perform more precisely than before.
- the object is achieved according to the invention in that at least in a support segment, the strand extraction force and / or the locking force of the support segments measured and that from the measured values the area of the swamp tip is determined.
- This procedure makes the measurement more immediate than all previous ones Method because there is a connection between the solidification length and the required pull-out force exists. Because of this, more accurate Layers of final solidification can be determined. A particularly precise determination takes place instead of both the strand pull-out force and the locking force of the support segments measured and the area of the sump peak determined from the measured values becomes.
- the pull-out force from the power consumption of the pull-out drives can be determined. That is what the stands for Motors consumed current available through ongoing measurement.
- the determination the strand extraction force from the power consumption of the strand drives is independent of the design of the continuous casting machine (vertical, vertical bending or circular arc system) possible. Even if it were assumed that the influence of the position of the final solidification on the total strand pull-out force would not be very high, this path still shows itself as a viable way, how is still described.
- the current strand pull-out force can also be determined by sensors installed below the support points of the support segments.
- the accuracy of the measurements is greatly increased by the fact that the position of the Swamp tip can be determined with an accuracy of about a pair of rollers can.
- a further increase in the accuracy of the measurement can also be achieved are measured values for the casting speed, the steel grade, the steel temperature, the heat flow in the continuous casting mold, the amount of cooling water and the cooling water pressure in the secondary cooling in the position determination in one Model approach can be included.
- a device for determining the position of the final solidification in the casting strand at Continuous casting of metals, in particular steel, in which the in the continuous casting mold generated casting strand guided in support segments, cooled and through the Support segments with driven pairs of support rollers can be pulled out solves the posed Task according to the invention in that at the end of a support segment load cells are arranged perpendicular to the casting direction and that based on their measured values individually or together with values of the drive power Values of the strand pull-out force can be calculated, which are a measure of the Form the position of the final solidification. This enables an exact determination of the situation of the area of final solidification taking place, being relatively simple and tried Funds can be used.
- the load cells can be used in such a way that the load cells non-positively between two successive support segments are arranged.
- This solution is e.g. a practical way for vertical systems, to increase the measuring accuracy.
- the last load cells in the Strand path are arranged in front of driven support roller pairs and on the Segment frames are supported. This causes the strand pull-out force in this Area, i.e. determined in front of the driven support rollers.
- Another improvement provides that the position of the final solidification with the Accuracy between two successive pairs of rollers can be determined.
- Combination with the measurement of the locking force of the support segments e.g. via the Hydraulic pressure of the segment cylinder
- the position of the final solidification from the Extraction force can be determined with an accuracy of one pair of rollers.
- the vertical continuous casting installation shown in FIG. 1 can also be used as a vertical bending installation or be viewed as an arch system.
- a casting strand 2 is produced from partially solidified steel and in support segments 3 and 4 guided, cooled and supported between sets of pairs of rollers.
- the casting strand 2 is pulled out by means of driven roller pairs 5 and 6.
- the method for determining the position of the final solidification 12 becomes such executed that at least in a support segment 3 or 4, the strand pull-out force 10 and / or the locking force of the support segments 3, 4 by (not shown) sensors present in hydraulic piston-cylinder units measured and that the area of the sump peak is determined from the measured values becomes.
- the strand extraction force 10 is calculated from the power consumption the strand pull-out drives.
- An alternative is that the strand pull 10 via load cells 7, 8 installed perpendicular to the casting direction Form load cell pairs 9, is calculated.
- the measurement can be completed within a calculation model by Measured values for the casting speed, the steel grade, the steel temperature, the Heat flow in the continuous casting mold 1, the amount of cooling water and the cooling water pressure in the secondary cooling in the position determination in a calculation model approach be taken into account.
- load cells 7, 7 and 8 are connected to load cell pairs 9 arranged.
- the measured values of the load cells 7, 8 are in the form of the strand pull-out force 10 processed individually or together with values of the strand drive power 11, which gives a measure of the position 12 of the final solidification.
- the load cells 7, 8 are non-positively between each other following support segments 3, 4 are arranged, the last load cells 8, 89 are supported in the strand path in front of the driven support roller pairs 5, 6.
- the Measured values are taken from the load cells 7, 8 in pairs in a computing model approach entered with.
- the position of the final solidification 12 is at least with the distance between two successive pairs of rollers of the strand guide issued or displayed.
- Fig. 3 is a diagram of the solidification length (mm) and the strand pull-out force (kN). From this is a very direct method, the location of the To determine the final solidification. The pull-out resistance is used for the segments determined. From the calculated strand extension length and the change the strand pull-out force results from the change in the solidification length the final solidification.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
Ein Verfahren und eine Einrichtung dienen zum Bestimmen der Lage der Enderstarrung (12) im Gießstrang (2) beim Stranggießen von Metallen, insbesondere von Stahl, bei dem der in der Stranggießkokille (1) erzeugte Gießstrang (2) in Stützsegmenten (3,4) geführt, gekühlt und durch die Stützsegmente (3,4) mit angetriebenen Rollenpaaren (5,6) ausgezogen wird. Um die Lage der Enderstarrung (12) genauer zu bestimmen, wird vorgeschlagen, dass zumindest in einem Stützsegment (3;4) die Strangauszugskraft (10) und / oder die Zuhaltekraft der Stützsegmente (3,4) gemessen und dass aus den Messwerten der Bereich der Sumpfspitze bestimmt wird. <IMAGE>A method and a device are used to determine the position of the final solidification (12) in the casting strand (2) during the continuous casting of metals, in particular steel, in which the casting strand (2) generated in the continuous casting mold (1) is in support segments (3, 4). guided, cooled and pulled out through the support segments (3,4) with driven roller pairs (5,6). In order to determine the position of the final solidification (12) more precisely, it is proposed that the strand pull-out force (10) and / or the locking force of the support segments (3, 4) be measured in at least one support segment (3; 4), and that the range from the measured values the bottom of the swamp is determined. <IMAGE>
Description
Die Erfindung betrifft ein Verfahren und eine Einrichtung zum Bestimmen der Lage der Enderstarrung im Gießstrang beim Stranggießen von Metallen, insbesondere von Stahl, bei dem der in der Stranggießkokille erzeugte Gießstrang in Stützsegmenten geführt gekühlt und durch die Stützsegmente mit angetriebenen Stützrollenpaaren ausgezogen wird.The invention relates to a method and a device for determining the position the final solidification in the casting strand when continuously casting metals, in particular of steel, in which the casting strand produced in the continuous casting mold is in support segments guided cooled and through the support segments with driven support roller pairs is pulled out.
Eine genaue Bestimmung der Lage der Enderstarrung ist für das Stranggießen von großer Bedeutung. Ein Aspekt ist die Betriebssicherheit, weil bei Kenntnis der Lage der Enderstarrung verhindert werden kann, dass die Erstarrungslänge größer wird als die gestützte Länge und der Strang unter Einfluss der Ferrostatik außerhalb der Strangführung unkontrolliert aufbläht.A precise determination of the position of the final solidification is for continuous casting of great importance. One aspect is operational safety, because knowing the Position of the final solidification can be prevented that the solidification length is greater is called the supported length and the strand under the influence of ferrostatics outside the strand guide inflates in an uncontrolled manner.
Es ist aber auch möglich, eine Verbesserung der Produktqualität zu erreichen, weil mit Kenntnis der Lage der Enderstarrung auch Position und Rate der Soft-Reduction optimiert bzw. wechselnden Gießbedingungen angepasst werden kann, sofern das entsprechende Stützsegment während des Betriebes z.B. hydraulisch verstellbar ist. In diesem Zusammenhang ist es notwendig, die Lage der Enderstarrung zumindest in einer praktikablen Größenordnung zu kennen. But it is also possible to achieve an improvement in product quality because with knowledge of the position of the final solidification also position and rate of soft reduction can be optimized or adapted to changing casting conditions, if the corresponding support segment during operation e.g. hydraulic is adjustable. In this context, it is necessary to determine the position of the final solidification to know at least on a practical scale.
Bekannte Verfahren (JP 7270349; JP 62 148 850) beruhen auf Durchstrahlen des Gießstranges mit Gammastrahlen in einem Bereich, in dem eine Enderstarrung des Gießstrangs nicht vorliegen kann. Die Lage der Enderstarrung kann daher weder genau noch schätzungsweise ermittelt werden.Known methods (JP 7270349; JP 62 148 850) are based on irradiating the Casting strand with gamma rays in an area in which a final solidification of the casting strand cannot be present. The location of the final solidification can therefore can be determined neither exactly nor estimated.
Andere bekannte Verfahren bedienen sich der Oberflächen-Temperatur-Messung und einer auf den Messwerten beruhenden Simulations-Rechnung (JP 600 54257; DD 293 071 A5) Keines der bekannten Verfahren ergibt ausreichend genaue Werte für die Lage der Enderstarrung.Other known methods use the surface temperature measurement and a simulation calculation based on the measured values (JP 600 54257; DD 293 071 A5) None of the known methods gives sufficiently precise information Values for the position of the final solidification.
Die Lage der Enderstarrung ist derzeit noch nicht direkt messbar. Es ist zwar möglich, über die Messung der Zuhaltekräfte der Stützsegmente (z.B. durch Drucksensoren in den Hydraulikzylindern) zu schließen, in welchem Stützsegment die Enderstarrung gerade stattfindet. Im Hinblick auf die Länge des Stützsegmentes ist dieses Verfahren nicht genau genug.The position of the final solidification cannot currently be measured directly. It is possible by measuring the locking forces of the support segments (e.g. through Pressure sensors in the hydraulic cylinders) in which support segment final solidification is taking place. With regard to the length of the support segment this procedure is not accurate enough.
Der Erfindung liegt die Aufgabe zugrunde, die Ermittlung der Lage der Enderstarrung genauer als bisher durchzuführen.The invention has for its object to determine the position of the final solidification to perform more precisely than before.
Die gestellte Aufgabe wird erfindungsgemäß dadurch gelöst, dass zumindest in einem Stützsegment die Strangausziehkraft und / oder die Zuhaltekraft der Stützsegmente gemessen und dass aus den Messwerten der Bereich der Sumpfspitze bestimmt wird. Dieses Verfahren gestaltet die Messung unmittelbarer als alle bisherigen Verfahren, da ein Zusammenhang zwischen der Erstarrungslänge und der benötigten Strangauszugskraft besteht. Aus diesem Grunde können genauere Lagen der Enderstarrung ermittelt werden. Eine besonders genaue Ermittlung findet statt, wenn sowohl die Strangauszugskraft als auch die Zuhaltekraft der Stützsegmente gemessen und aus den Messwerten der Bereich der Sumpfspitze bestimmt wird. The object is achieved according to the invention in that at least in a support segment, the strand extraction force and / or the locking force of the support segments measured and that from the measured values the area of the swamp tip is determined. This procedure makes the measurement more immediate than all previous ones Method because there is a connection between the solidification length and the required pull-out force exists. Because of this, more accurate Layers of final solidification can be determined. A particularly precise determination takes place instead of both the strand pull-out force and the locking force of the support segments measured and the area of the sump peak determined from the measured values becomes.
Dabei kann nach weiteren Merkmalen die Strangauszugskraft aus der Leistungsaufnahme der Strangausziehantriebe bestimmt werden. Dafür steht der von den Motoren aufgenommene Strom durch laufende Messung zur Verfügung. Die Bestimmung der Strangauszugskraft aus der Leistungsaufnahme der Strangantriebe ist unabhängig von der Bauart der Stranggießmaschine (Senkrecht-, Senkrechtabbiege- oder Kreisbogenanlage) möglich. Selbst wenn davon auszugehen wäre, dass der Einfluss der Lage der Enderstarrung auf die gesamte Strangauszugskraft nicht sehr hoch wäre, zeigt sich dieser Weg trotzdem als ein gangbarer Weg, wie noch beschrieben wird.According to further characteristics, the pull-out force from the power consumption of the pull-out drives can be determined. That is what the stands for Motors consumed current available through ongoing measurement. The determination the strand extraction force from the power consumption of the strand drives is independent of the design of the continuous casting machine (vertical, vertical bending or circular arc system) possible. Even if it were assumed that the influence of the position of the final solidification on the total strand pull-out force would not be very high, this path still shows itself as a viable way, how is still described.
Eine weitere Methode, die selbständig oder als Kontrollmethode eingesetzt werden kann, besteht darin, dass die Strangauszugskraft über senkrecht zur Gießrichtung eingebaute Kraftmessdosen bestimmt wird. Bei Senkrechtanlagen (z.B. CSP-Anlagen) kann die aktuelle Strangauszugskraft auch durch Sensoren bestimmt werden, die unterhalb der Auflagepunkte der Stützsegmente installiert sind.Another method that can be used independently or as a control method can, is that the strand pull-out force is perpendicular to the casting direction built-in load cells is determined. For vertical systems (e.g. CSP systems), the current strand pull-out force can also be determined by sensors installed below the support points of the support segments.
Die Genauigkeit der Messungen wird dadurch sehr gesteigert, dass die Lage der Sumpfspitze mit einer Genauigkeit von etwa einem Rollenpaar bestimm werden kann.The accuracy of the measurements is greatly increased by the fact that the position of the Swamp tip can be determined with an accuracy of about a pair of rollers can.
Eine weitere Steigerung der Genauigkeit der Messung kann außerdem erzielt werden, indem Messwerte für die Gießgeschwindigkeit, die Stahlsorte, die Stahltemperatur, den Wärmestrom in der Stranggießkokille, die Kühlwassermenge und den Kühlwasserdruck in der Sekundärkühlung in die Lagebestimmung in einem Modellansatz mit eingerechnet werden.A further increase in the accuracy of the measurement can also be achieved are measured values for the casting speed, the steel grade, the steel temperature, the heat flow in the continuous casting mold, the amount of cooling water and the cooling water pressure in the secondary cooling in the position determination in one Model approach can be included.
Eine Einrichtung zum Bestimmen der Lage der Enderstarrung im Gießstrang beim Stranggießen von Metallen, insbesondere von Stahl, bei dem der in der Stranggießkokille erzeugte Gießstrang in Stützsegmenten geführt, gekühlt und durch die Stützsegmente mit angetriebenen Stützrollenpaaren ausziehbar ist, löst die gestellte Aufgabe erfindungsgemäß dadurch, dass am Ende eines Stützsegmentes jeweils Kraftmessdosen senkrecht zur Gießrichtung angeordnet sind und dass aufgrund deren Messwerte einzeln oder zusammen mit Werten der Strangantriebsleistung Werte der Strangauszugskraft errechenbar sind, die ein Maß für die Lage der Enderstarrung bilden. Dadurch findet eine genaue Ermittlung der Lage des Bereiches der Enderstarrung statt, wobei verhältnismäßig einfache und erprobte Mittel einsetzbar sind.A device for determining the position of the final solidification in the casting strand at Continuous casting of metals, in particular steel, in which the in the continuous casting mold generated casting strand guided in support segments, cooled and through the Support segments with driven pairs of support rollers can be pulled out, solves the posed Task according to the invention in that at the end of a support segment load cells are arranged perpendicular to the casting direction and that based on their measured values individually or together with values of the drive power Values of the strand pull-out force can be calculated, which are a measure of the Form the position of the final solidification. This enables an exact determination of the situation of the area of final solidification taking place, being relatively simple and tried Funds can be used.
Der Einsatz kann nach weiteren Merkmalen derart erfolgen, dass die Kraftmessdosen kraftschlüssig zwischen jeweils zwei aufeinanderfolgenden Stützsegmenten angeordnet sind. Diese Lösung ist z.B. für Senkrechtanlagen ein praktikabler Weg, um die Messgenauigkeit zu steigem.According to other features, the load cells can be used in such a way that the load cells non-positively between two successive support segments are arranged. This solution is e.g. a practical way for vertical systems, to increase the measuring accuracy.
Nach einer weiteren Ausgestaltung ist vorgesehen, dass letzte Kraftmessdosen im Strangweg vor angetriebenen Stützrollenpaaren angeordnet sind und auf dem Segmentrahmen aufgelagert sind. Dadurch wird die Strangauszugskraft in diesem Bereich, d.h. vor den angetriebenen Stützrollen ermittelt.According to a further embodiment it is provided that the last load cells in the Strand path are arranged in front of driven support roller pairs and on the Segment frames are supported. This causes the strand pull-out force in this Area, i.e. determined in front of the driven support rollers.
Für eine Erhöhung der Genauigkeit der Messwerte ist ferner vorteilhaft, dass die Messwerte aus Paaren von Kraftmessdosen in einem Modell-Ansatz mit berücksichtigt werden.To increase the accuracy of the measured values, it is also advantageous that the Measured values from pairs of load cells are taken into account in a model approach become.
Eine andere Verbesserung sieht vor, dass die Lage der Enderstarrung mit der Genauigkeit zwischen zwei aufeinanderfolgenden Rollenpaaren bestimmbar ist. In Kombination mit der Messung der Zuhaltekraft der Stützsegmente (z.B. über den Hydraulikdruck der Segmentzylinder) kann die Lage der Enderstarrung aus der Strangauszugskraft mit einer Genauigkeit von einem Rollenpaar bestimmt werden. Another improvement provides that the position of the final solidification with the Accuracy between two successive pairs of rollers can be determined. In Combination with the measurement of the locking force of the support segments (e.g. via the Hydraulic pressure of the segment cylinder) can change the position of the final solidification from the Extraction force can be determined with an accuracy of one pair of rollers.
Der Vorteil ist, dass dieses Verfahren nicht mehr von der Genauigkeit eines Modellansatzes abhängig ist und auch systematische oder temporär auftretende Fehler bei der Erfassung der Modell-Eingabedaten, z.B. verstopfte Düsen, Fehlstellungen und Verformungen der Stützsegmente, Rollenverschleiß, Messfehler bei der Wärme-stromdichte oder der Stahltemperatur, keinen Einfluss auf die Genauigkeit der Bestimmung der Lage der Enderstarrung haben.The advantage is that this method no longer depends on the accuracy of a model approach is dependent and also systematic or temporary Errors in the acquisition of the model input data, e.g. clogged nozzles, misalignments and deformations of the support segments, roller wear, measurement errors with the heat current density or the steel temperature, no influence on the accuracy the determination of the position of the final solidification.
In der Zeichnung ist ein Ausführungsbeispiel der Erfindung beschrieben und wird im folgenden näher erläutert. Es zeigen:
- Fig. 1
- eine Senkrecht-Stranggießvorrichtung im Aufriss mit Stützsegmenten,
- Fig. 2
- ein Blockschaltbild für den Messkreis und
- Fig. 3
- ein Strangauszugskraft - Erstarrungslänge-Diagramm.
- Fig. 1
- a vertical continuous casting device in elevation with support segments,
- Fig. 2
- a block diagram for the measuring circuit and
- Fig. 3
- a strand pull-out - solidification length diagram.
Die in Fig. 1 dargestellte Senkrecht-Stranggießanlage kann ebenso als Senkrecht-Abbiege-Anlage
oder als Bogenanlage angesehen werden. In der Stranggießkokille
1 wird ein Gießstrang 2 aus teilweise erstarrtem Stahl erzeugt und in Stützsegmenten
3 und 4 zwischen Sätzen von Rollenpaaren geführt, gekühlt und gestützt.
Der Gießstrang 2 wird mittels angetriebenen Rollenpaaren 5 und 6 ausgezogen.
Das verfahren zum bestimmen der Lage der Enderstarrung 12 wird derart
ausgeführt, dass zumindest in einem Stützsegment 3 oder 4 die Strangauszugskraft
10 und / oder die Zuhaltekraft der Stützsegmente 3, 4 durch (nicht näher gezeichnete)
in hydraulischen Kolben-Zylinder-Einheiten vorhandene Sensoren gemessen
und dass aus den Messwerten der Bereich der Sumpfspitze bestimmt
wird. Dabei berechnet sich die Strangauszugskraft 10 aus der Leistungsaufnahme
der Strangausziehantriebe. Eine Alternative besteht darin, dass die Strangauszugskraft
10 über senkrecht zur Gießrichtung eingebaute Kraftmessdosen 7, 8, die
Kraftmessdosen-Paare 9 bilden, errechnet wird. The vertical continuous casting installation shown in FIG. 1 can also be used as a vertical bending installation
or be viewed as an arch system. In the
Die Messung kann innerhalb eines Rechen-Modells vervollständigt werden, indem
Messwerte für die Gießgeschwindigkeit, die Stahlsorte, die Stahltemperatur, den
Wärmestrom in der Stranggießkokille 1, die Kühlwassermenge und den Kühlwasserdruck
in der Sekundärkühlung in die Lagebestimmung in einem Rechenmodell-Ansatz
berücksichtigt werden.The measurement can be completed within a calculation model by
Measured values for the casting speed, the steel grade, the steel temperature, the
Heat flow in the
Am Ende 3a, 4a eines jeweiligen Stützsegmentes 3, 4 sind senkrecht zur Gießrichtung
jeweils Kraftmessdosen 7, 7 und 8, 8, zu Kraftmessdosen-Paaren 9 zusammengeschaltet
angeordnet.At the
Die Messwerte der Kraftmessdosen 7, 8 in Form der Strangauszugskraft 10 werden
einzeln oder zusammen mit Werten der Strangantriebsleistung 11 verarbeitet,
woraus sich ein Maß für die Lage 12 der Enderstarrung ergibt.The measured values of the
Die Kraftmessdosen 7, 8 sind kraftschlüssig zwischen jeweils zwei aufeinander
folgende Stützsegmente 3, 4 angeordnet, wobei die letzten Kraftmessdosen 8, 89
im Strangweg vor den angetriebenen Stützrollenpaaren 5, 6 aufgestützt sind. Die
Messwerte werden von den Kraftmessdosen 7, 8 paarweise in einen Rechenmodell-Ansatz
mit eingegeben. Die Lage der Enderstarrung 12 wird zumindest mit
dem Abstand zwischen zwei aufeinanderfolgenden Rollenpaaren der Strangführung
ausgegeben oder angezeigt.The
In Fig. 3 ist ein Diagramm über der Erstarrungslänge (mm) und der Strangauszugskraft (kN) dargestellt. Daraus ist eine sehr direkte Methode, die Lage der Enderstarrung zu bestimmen, zu entnehmen. Für die Segmente wird der Auszugswiderstand ermittelt. Aus der berechneten Strangauszugslänge und der Änderung der Strangauszugskraft ergibt sich aufgrund der Änderung der Erstarrungslänge die Enderstarrung. In Fig. 3 is a diagram of the solidification length (mm) and the strand pull-out force (kN). From this is a very direct method, the location of the To determine the final solidification. The pull-out resistance is used for the segments determined. From the calculated strand extension length and the change the strand pull-out force results from the change in the solidification length the final solidification.
- 11
- Stranggießkokillecontinuous casting
- 22
- Gießstrangcast strand
- 33
- Stützsegmentsupporting segment
- 3a3a
- Ende des StützsegmentsEnd of the support segment
- 44
- Stützsegmentsupporting segment
- 4a4a
- Ende des StützsegmentsEnd of the support segment
- 55
- angetriebenes Rollenpaardriven roller pair
- 66
- angetriebenes Rollenpaardriven roller pair
- 77
- KraftmessdoseLoad cell
- 88th
- KraftmessdoseLoad cell
- 99
- KraftmessdosenpaarLoad cells couple
- 1010
- StrangauszugskraftStrand withdrawal force
- 1111
- StrangantriebsleistungTrain Drive Performance
- 1212
- Lage der EnderstarrungLocation of final solidification
- 1313
- Segmentrahmensegment frame
Claims (10)
dadurch gekennzeichnet, dass zumindest in einem Stützsegment die Strangauszugskraft und / oder die Zuhaltekraft der Stützsegmente gemessen und dass aus den Messwerten der Bereich der Sumpfspitze bestimmt wird.Method for determining the position of the final solidification in the casting strand during the continuous casting of metals, in particular steel, in which the casting strand produced in the continuous casting mold is guided in support segments, cooled and pulled out by the support segments with driven roller pairs,
characterized in that the strand pull-out force and / or the locking force of the support segments is measured at least in one support segment and that the area of the sump tip is determined from the measured values.
dadurch gekennzeichnet, dass die Strangauszugskraft aus der Leistungsaufnahme der Strangausziehantriebe bestimmt wird.Method according to claim 1,
characterized in that the strand pull-out force is determined from the power consumption of the strand pull-out drives.
dadurch gekennzeichnet, dass die Strangauszugskraft über senkrecht zur Gießrichtung eingebaute Kraftmessdosen bestimmt wird. Method according to one of claims 1 or 2,
characterized in that the strand pull-out force is determined via load cells installed perpendicular to the casting direction.
dadurch gekennzeichnet, dass die Lage der Sumpfspitze mit einer Genauigkeit von etwa einem Rollenpaar bestimmt wird.Method according to one of claims 1 to 3,
characterized in that the position of the swamp tip is determined with an accuracy of about a pair of rollers.
dadurch gekennzeichnet, dass Messwerte für die Gießgeschwindigkeit, die Stahlsorte, die Stahltemperatur, den Wärmestrom in der Stranggießkokille, die Kühlwassermenge und den Kühlwasserdruck in der Sekundärkühlung in die Lagebestimmung in einem Modellansatz mit eingerechnet werden.Method according to one of claims 1 to 4,
characterized in that measured values for the casting speed, the steel grade, the steel temperature, the heat flow in the continuous casting mold, the cooling water quantity and the cooling water pressure in the secondary cooling are included in the position determination in a model approach.
dadurch gekennzeichnet, dass am Ende (3a; 4a) eines Stützsegmentes (3,4) jeweils Kraftmessdosen (7,8) senkrecht zur Gießrichtung angeordnet sind und dass aufgrund deren Messwerte einzeln oder zusammen mit Werten der Strangantriebsleistung (11) Werte der Strangauszugskraft (10) errechenbar sind, die ein Maß für die Lage (12) der Enderstarrung bilden.Device for determining the position of the final solidification in the casting strand during the continuous casting of metals, in particular steel, in which the casting strand produced in the continuous casting mold is guided in supporting segments, cooled and can be pulled out by the supporting segments with driven supporting roller pairs,
characterized in that load cells (7, 8) are arranged perpendicular to the casting direction at the end (3a; 4a) of a support segment (3,4) and that, based on their measured values, individually or together with values of the strand drive power (11) values of the strand pull-out force (10 ) can be calculated, which form a measure of the position (12) of the final solidification.
dadurch gekennzeichnet, dass die Kraftmessdosen (7;8) kraftschlüssig zwischen jeweils zwei aufeinanderfolgenden Stützsegmenten (3,4,) angeordnet sind. Device according to claim 6,
characterized in that the load cells (7; 8) are arranged non-positively between two successive support segments (3, 4,).
dadurch gekennzeichnet, dass letzte Kraftmessdosen (8) im Strangweg vor angetriebenen Stützrollenpaaren (5,6) angeordnet und auf dem Segmentrahmen (13) aufgelagert sind.Device according to one of claims 6 or 7,
characterized in that the last load cells (8) are arranged in the strand path in front of driven support roller pairs (5, 6) and are supported on the segment frame (13).
dadurch gekennzeichnet, dass die Messwerte aus Paaren (9) von Kraftmessdosen (7,8) in einem Modell-Ansatz mit berücksichtigt werden.Device according to one of claims 5 to 7,
characterized in that the measured values from pairs (9) of load cells (7,8) are also taken into account in a model approach.
dadurch gekennzeichnet, dass die Lage der Enderstarrung (12) zumindest mit der Genauigkeit zwischen zwei aufeinanderfolgenden Rollenpaaren (5, 6) bestimmbar ist.Device according to one of claims 6 to 9,
characterized in that the position of the final solidification (12) can be determined at least with the accuracy between two successive pairs of rollers (5, 6).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2000145250 DE10045250A1 (en) | 2000-09-13 | 2000-09-13 | Process for determining the position of the final solidification in a casting strand during continuous casting of steel comprises measuring the strand pulling force and/or holding force of supporting segments |
| DE10045250 | 2000-09-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1193007A1 true EP1193007A1 (en) | 2002-04-03 |
Family
ID=7656042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01119487A Withdrawn EP1193007A1 (en) | 2000-09-13 | 2001-08-14 | Process and device for determining the position of the crater end in a cast strand during continuous metal casting, especially of steel |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1193007A1 (en) |
| DE (1) | DE10045250A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1249288A2 (en) * | 2001-04-11 | 2002-10-16 | SMS Demag AG | Process and device for controlling the driving forces in continuous casting machines |
| EP1731243A2 (en) * | 2005-06-08 | 2006-12-13 | SMS Demag AG | Mmethod and device for continuously casting molten metals,particularly molten metal steels,with strand guide comprising guide roller segments |
| DE102008014524A1 (en) | 2007-12-28 | 2009-07-02 | Sms Demag Ag | Continuous casting plant with a device for determining solidification states of a cast strand and method therefor |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002098587A2 (en) * | 2001-06-01 | 2002-12-12 | Sms Demag Aktiengesellschaft | Method for adjusting the dynamic soft reduction of continuous casting systems |
| DE102004002783A1 (en) | 2004-01-20 | 2005-08-04 | Sms Demag Ag | Method and device for determining the position of the sump tip in the casting strand in the continuous casting of liquid metals, in particular of liquid steel materials |
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| JPS56151147A (en) * | 1980-04-24 | 1981-11-24 | Nippon Steel Corp | Method for detecting leading end position of unsolidified part of continuously cast ingot |
| JPS62148850A (en) * | 1985-12-24 | 1987-07-02 | Kawasaki Steel Corp | Solidification state detecting method for billet |
| DD293071A5 (en) * | 1989-11-28 | 1991-08-22 | Wologda Polytechnisches Institut,Su | METHOD FOR CONTROLLING THE CONTINUOUS GASING OF METALS |
| JPH058006A (en) * | 1991-07-05 | 1993-01-19 | Kobe Steel Ltd | Method for detecting perfectly solidified position in continuously cast slab |
| JPH09225611A (en) * | 1996-02-20 | 1997-09-02 | Sumitomo Metal Ind Ltd | Method for determining the position of complete solidification of continuously cast slabs |
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2000
- 2000-09-13 DE DE2000145250 patent/DE10045250A1/en not_active Withdrawn
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2001
- 2001-08-14 EP EP01119487A patent/EP1193007A1/en not_active Withdrawn
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|---|---|---|---|---|
| JPS56151147A (en) * | 1980-04-24 | 1981-11-24 | Nippon Steel Corp | Method for detecting leading end position of unsolidified part of continuously cast ingot |
| JPS62148850A (en) * | 1985-12-24 | 1987-07-02 | Kawasaki Steel Corp | Solidification state detecting method for billet |
| DD293071A5 (en) * | 1989-11-28 | 1991-08-22 | Wologda Polytechnisches Institut,Su | METHOD FOR CONTROLLING THE CONTINUOUS GASING OF METALS |
| JPH058006A (en) * | 1991-07-05 | 1993-01-19 | Kobe Steel Ltd | Method for detecting perfectly solidified position in continuously cast slab |
| JPH09225611A (en) * | 1996-02-20 | 1997-09-02 | Sumitomo Metal Ind Ltd | Method for determining the position of complete solidification of continuously cast slabs |
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| PATENT ABSTRACTS OF JAPAN vol. 011, no. 378 (P - 645) 10 December 1987 (1987-12-10) * |
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| PATENT ABSTRACTS OF JAPAN vol. 1998, no. 01 30 January 1998 (1998-01-30) * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1249288A2 (en) * | 2001-04-11 | 2002-10-16 | SMS Demag AG | Process and device for controlling the driving forces in continuous casting machines |
| EP1249288A3 (en) * | 2001-04-11 | 2002-12-18 | SMS Demag AG | Process and device for controlling the driving forces in continuous casting machines |
| EP1731243A2 (en) * | 2005-06-08 | 2006-12-13 | SMS Demag AG | Mmethod and device for continuously casting molten metals,particularly molten metal steels,with strand guide comprising guide roller segments |
| EP1731243A3 (en) * | 2005-06-08 | 2008-03-26 | SMS Demag AG | Method and device for continuously casting molten metals, particularly molten metal steels, with strand guide comprising guide roller segments |
| DE102008014524A1 (en) | 2007-12-28 | 2009-07-02 | Sms Demag Ag | Continuous casting plant with a device for determining solidification states of a cast strand and method therefor |
| WO2009083231A1 (en) | 2007-12-28 | 2009-07-09 | Sms Siemag Ag | Continuous casting line with a device for determining stiffness states of a casting strand and associated method |
| US8336602B2 (en) | 2007-12-28 | 2012-12-25 | Sms Siemag Aktiengesellschaft | Continuous casting installation with a device for determining solidification states of casting strand and associated method |
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|---|---|
| DE10045250A1 (en) | 2002-03-21 |
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