EP1358955B1 - Method and apparatus for recognition of the condition of components or assemblies of a oscillation unit in continuous casting machines for liquid metals, in particular for liquid steels - Google Patents

Method and apparatus for recognition of the condition of components or assemblies of a oscillation unit in continuous casting machines for liquid metals, in particular for liquid steels Download PDF

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Publication number
EP1358955B1
EP1358955B1 EP03005200A EP03005200A EP1358955B1 EP 1358955 B1 EP1358955 B1 EP 1358955B1 EP 03005200 A EP03005200 A EP 03005200A EP 03005200 A EP03005200 A EP 03005200A EP 1358955 B1 EP1358955 B1 EP 1358955B1
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Prior art keywords
characteristic curve
oscillation
continuous casting
state
drive
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German (de)
French (fr)
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EP1358955A1 (en
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Axel Weyer
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SMS Siemag AG
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SMS Demag AG
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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
    • B22D11/166—Controlling or regulating processes or operations for mould oscillation

Definitions

  • the invention relates to a method for detecting the machine state of elements or assemblies of an oscillating device in continuous casting for liquid metals, especially for liquid steel, with a mounted on a lift table continuous casting mold, the lifting table periodically via one or more oscillating in a resilient guide and up is moved.
  • Mechanical or hydraulic oscillation devices for molds are used in continuous casters for billet, block, pre-profile, slab and thin-strand cross-sectional shapes.
  • the lift table with the continuous casting mold can be equipped with spring systems as a guide or as a load compensation device.
  • the drive of the system consists of mechanical eccentric gears or hydraulic oscillating drives, ie piston-cylinder units which are controlled or controlled by electronic control systems, the control systems essentially providing a dynamic position setpoint adjustment for the generation of a required periodic Provide movement sequence of Kokillenoszillation in the casting operation.
  • a lifting table with oscillation drive for a continuous casting machine is from the DE 100 33 656 A1 known.
  • the pressure in the hydraulic fluid is measured here continuously and the pressure values over the working surfaces of several piston-cylinder units are converted into a filling level in the mold.
  • WO 02/070172 discloses a method for determining characteristic data of an oscillation system of an oscillating continuous casting mold.
  • a hysteresis curve of the stroke is determined as a function of the drive force over a stroke cycle, in order to determine the loss work of the oscillation system from the area of the hysteresis curve.
  • the loss work basically includes the friction losses between the mold and the strand as well as mechanical losses in the suspension and drive train. The latter can be determined separately by an idle measurement.
  • the recorded characteristic is generated in the idle state of the system and thus in new condition.
  • This diagnosis can be made without a local inspection or even the removal of components.
  • the diagnosis can also be carried out with changed oscillation values.
  • substantially the given operating window is traversed (with respect to the oscillatory strokes driven in production), e.g. + / - 8 mm, based on a given starting situation.
  • the deviations that may have been detected in the comparison of the two characteristic curves may be in a gradient or level change.
  • a modified spring stiffness and unwanted collisions such as cast residues in the oscillation, which cause an additional load or changes in the drive system, can be determined.
  • the characteristic is recorded in each case as a function of the distance covered and the momentary force of the oscillation drive. This record can then be stored in the control and diagnosis system of the oscillation drive.
  • the characteristic curve is formed from the respective chamber pressures in the cylinder of one or more hydraulic piston-cylinder drives as oscillation drive.
  • average values can be formed for the totality of the drives.
  • the designs can be adapted to the respective drive concept according to the number of piston-cylinder units.
  • the data recording and a graphic or numerical representation in the control and diagnosis system of the oscillation drive is made.
  • the further processing of the recorded values can be used directly as control values for pressure regulation.
  • the characteristic curve is generated cyclically. As a result, a historical change in characteristics can be easily determined. In addition, the archiving can take place at the same time.
  • Another possibility of monitoring is that when detected spring break the resilient guide or when exceeding a maximum force or below a minimum force of the oscillation drive is automatically switched off.
  • the required limits can be determined according to the given oscillation system.
  • the invention allows the operator an optimal basic setting or utilization of the oscillating device. For this purpose, it is provided that a good state of the oscillation characteristic curve is adjusted on the basis of the position of a visualized characteristic curve and thus on the basis of the utilization of the load compensation performed by the resilient guide. In comparison to the theoretically determined data (spring constants and weight forces), the optimal basic setting can be determined. In particular, in multi-cylinder arrangements corresponding basic settings that have an equal load distribution as an objective (distribution of forces on all connected cylinders) can be simplified.
  • an oscillating device 1 is provided in a continuous casting plant for liquid steel, with a mounted on a lifting table 2 continuous casting mold 3.
  • the lifting table 2 is periodically moved up and down about one, two or four oscillating drives 4 in an existing of leaf spring assemblies resilient guide 5 to the solidifying casting strand from the continuous casting mold 3 to solve.
  • the resilient guide 5 can also be used for load compensation.
  • the oscillating drives 4 consist of hydraulic piston-cylinder drives 4a with pistons 4b.
  • the regulation or control of the oscillation drives 4 via electronic control systems, which essentially cause a dynamic position setpoint setting for the generation of a desired periodic movement of Kokillenoszillation for the casting operation.
  • the characteristic curve 8 can be recorded in each case as a function of the distance traveled 10 and the instantaneous force 11 of the oscillation drive 4.
  • the characteristic curve 8 is formed from the respective pressure 12a and 12b in the cylinder 13 of one or more hydraulic piston-cylinder drives 4a.
  • This data-log 14 ( Fig. 2 ), as well as a graphical or numerical representation 15 is stored in a control and diagnostic system 16 of the oscillation drive 4. Since the characteristics 8; 9 are generated cyclically, a permanent monitoring of the machine state takes place.
  • the characteristic curve 8 for the good state is recorded via a hydraulic pressure measurement 22 by means of pressure sensors 23 respectively at the cylinder chambers in front of and behind the piston 4b of the oscillation drive 4 or in the pressure lines 24. With gradual change 29 of position 6 of the piston 4b in the cylinder 13, the formation of the characteristic curves 8; 9 automatically pass through the rule and diagnostic system 16 (see "Setpoints for the diagnosis 27" in Fig. 2 ).
  • the for the creation of the curves 8; 9 recorded data 14 are each shown as image 25 and can be stored in parallel. When archiving the data 14 for the characteristic curves 8; 9, the control and diagnostic system 16 used in the continuous casting plant can be used.
  • an external data logging system can also be used.
  • the control and diagnostic system 16 is connected to the cylinder 13 for transmitting a valve control value 26 via a hydraulic valve 22a (two-way valve) and the pressure lines 24.
  • the setpoint values 27 for the control and diagnostic system 16 can be generated as a continuous specification 28 or as a stepwise specification 29.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Investigating And Analyzing Materials By Characteristic Methods (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

Recognizing the machine condition of elements or components of an oscillation device (1) in continuous casting machines for liquid metals, especially liquid steel, comprises recording a characteristic line (7) for the material condition (8) via step-wise or continuous position changes (6) of the oscillation drive (4), and comparing with a characteristic line (9) corresponding with each condition during the operation. An Independent claim is also included for a device for recognizing the machine condition of elements or components of an oscillation device in continuous casting machines for liquid metals, especially liquid steel.

Description

Die Erfindung betrifft ein Verfahren zum Erkennen des Maschinenzustandes von Elementen oder Baugruppen einer Oszillationsvorrichtung in Stranggießanlagen für flüssige Metalle, insbesondere für flüssigen Stahl, mit einer auf einem Hubtisch gelagerten Stranggießkokille, wobei der Hubtisch über einen oder mehrere Oszillationsantriebe in einer federnden Führung periodisch auf- und abbewegt wird.The invention relates to a method for detecting the machine state of elements or assemblies of an oscillating device in continuous casting for liquid metals, especially for liquid steel, with a mounted on a lift table continuous casting mold, the lifting table periodically via one or more oscillating in a resilient guide and up is moved.

Es werden mechanische oder hydraulische Oszillationsvorrichtungen für Kokillen in Stranggießanlagen für Knüppel-, Block-, Vorprofil-, Brammen- und Dünnstrang-Querschnittsformen eingesetzt. Der Hubtisch mit der Stranggießkokille kann mit Feder-Systemen als Führung oder als Lastkompensations-Einrichtung ausgerüstet werden. Der Antrieb des Systems besteht aus mechanischen Exzentergetrieben oder aus hydraulischen Oszillationsantrieben, d.h. aus Kolben-Zylinder-Einheiten, die über elektronische Regel-Systeme geregelt oder gesteuert werden, wobei die Regel-Systeme im wesentlichen eine dynamische Positionssollwert-Einstellung für die Erzeugung eines erforderlichen periodischen Bewegungsablaufs der Kokillenoszillation im Gießbetrieb vorsehen.Mechanical or hydraulic oscillation devices for molds are used in continuous casters for billet, block, pre-profile, slab and thin-strand cross-sectional shapes. The lift table with the continuous casting mold can be equipped with spring systems as a guide or as a load compensation device. The drive of the system consists of mechanical eccentric gears or hydraulic oscillating drives, ie piston-cylinder units which are controlled or controlled by electronic control systems, the control systems essentially providing a dynamic position setpoint adjustment for the generation of a required periodic Provide movement sequence of Kokillenoszillation in the casting operation.

Ein Hubtisch mit Oszillationsantrieb für eine Stranggießmaschine ist aus der DE 100 33 656 A1 bekannt. Der Druck in der Hydraulikflüssigkeit wird hier kontinuierlich gemessen und die Druckwerte über den Arbeitsflächen von mehreren Kolben-Zylinder-Einheiten werden in einen Füllstand in der Kokille umgerechnet.A lifting table with oscillation drive for a continuous casting machine is from the DE 100 33 656 A1 known. The pressure in the hydraulic fluid is measured here continuously and the pressure values over the working surfaces of several piston-cylinder units are converted into a filling level in the mold.

Die WO 02 / 070172 offenbart ein Verfahren zum Ermitteln von Kenndaten eines Oszillationssystems einer oszillierenden Stranggießkokille. Es wird eine HystereseKurve des Hubwegs als Funktion der Antriebskraft über einen Hubzyklus ermittelt, um aus der Fläche der Hysteresekurve die Verlustarbeit des Oszillationssystems zu ermitteln. Die Verlustarbeit umfasst grundsätzlich die Reibungsverluste zwischen Kokille und Strang sowie mechanische Verluste in Aufhängung und Antriebsstrang. Letztere können durch eine Leerlaufmessung separat ermittelt werden.WO 02/070172 discloses a method for determining characteristic data of an oscillation system of an oscillating continuous casting mold. A hysteresis curve of the stroke is determined as a function of the drive force over a stroke cycle, in order to determine the loss work of the oscillation system from the area of the hysteresis curve. The loss work basically includes the friction losses between the mold and the strand as well as mechanical losses in the suspension and drive train. The latter can be determined separately by an idle measurement.

Aus der EP 0 992 302 A1 ist ein Verfahen bekannt zur kontinuierlichen Kontrolle der Grundeinstellung und der Oszillationsparameter einer Stranggießkokille. Die Kokille ist auf einem Hubtisch angeordnet, der von vier eckständigen Hydraulikzylindern getragen und in Schwingungen versetzt wird. Die Oszillations-kräfte aller vier Hydraulikzylinder werden z.B. in einer Giesspause zeitgleich zusammen mit den jeweiligen Positionen der Hydraulikzylinder erfasst und ausgewertet; dies ist eine Auswuchthilfe für die Grundeinstellung der Oszillation. Eine Auswertung des Verhältnisses von Kraftwirkung und Position ermöglicht das Erkennen von Unregelmässigkeiten, z.B. dem Bruch einer Führungsrolle.From the EP 0 992 302 A1 A method is known for the continuous control of the basic setting and the oscillation parameters of a continuous casting mold. The mold is arranged on a lifting table, which is supported by four angular hydraulic cylinders and vibrated. The oscillatory forces of all four hydraulic cylinders are recorded and evaluated at the same time together with the respective positions of the hydraulic cylinders, for example in a casting gap; this is a balancing aid for the basic setting of the oscillation. An evaluation of the relationship of force and position allows the detection of irregularities, such as the break of a leadership role.

Der Erfindung liegt die Aufgabe zugrunde, ein alternatives und gegenüber dem Stand der Technik vereinfachtes Verfahren bereitzustellen zum Prüfen, ob der Ablauf der periodischen Bewegungen des Hubtisches mit der Stranggießkokille aufgrund von normal arbeitenden Elementen oder Baugruppen der Oszillationsvorrichtung stattfindet oder ob einzelne Elemente oder Baugruppen nicht funktionsgerecht arbeiten und dadurch den Ablauf der Bewegungen verfälschen:The invention has for its object to provide an alternative and compared to the prior art simplified method for checking whether the expiration of the periodic movements of the lift table with the continuous casting mold due to normal working elements or assemblies of the oscillating takes place or if individual elements or assemblies not functional work and thereby falsify the course of the movements:

Die gestellte Aufgabe wird erfindungsgemäß durch das in Anspruch 1 beanspruchte Verfahren gelöst.The stated object is achieved by the method claimed in claim 1.

Dadurch kann eine Erkennung des Zustandes der gesamten Oszillationsvorrichtung stattfinden. Die aufgezeichnete Kennlinie wird im Leerlaufzustand der Anlage und damit im Neuzustand erzeugt. Beim Vergleich dieses Gut-Zustandes mit der Kennlinie im Betriebszustand werden sofort Abweichungen sichtbar, die der Bediener leicht versteht und, falls erforderlich, sofortige Maßnahmen einleiten kann. Diese Diagnose kann ohne eine örtliche Besichtigung oder gar den Ausbau von Komponenten gestellt werden. Die Diagnose kann auch bei veränderten Oszillationswerten durchgeführt werden. Bei der ersten Aufzeichnung wird im wesentlichen das gegebene Betriebsfenster (in Bezug auf die im Produktionsbetrieb gefahrenen Oszillations-Hubbewegungen) durchfahren, z.B. + /- 8 mm, bezogen auf eine gegebene Startsituation.Thereby, a recognition of the state of the entire oscillating device take place. The recorded characteristic is generated in the idle state of the system and thus in new condition. When comparing this good state with the characteristic in the operating state deviations are immediately visible, the operator understands easily and, if necessary, can take immediate action. This diagnosis can be made without a local inspection or even the removal of components. The diagnosis can also be carried out with changed oscillation values. In the first recording, substantially the given operating window is traversed (with respect to the oscillatory strokes driven in production), e.g. + / - 8 mm, based on a given starting situation.

Die bei dem Vergleich der beiden Kennlinien evtl. festgestellten Abweichungen können in einer Steigungs- oder Niveauänderung liegen. So können neben der Feststellung einer veränderten Feder-Steifigkeit auch unerwünschte Kollisionen, z.B. Gussreste in der Oszillationsvorrichtung, die eine Zusatzlast verursachen oder Veränderungen im Antriebssystem, festgestellt werden.The deviations that may have been detected in the comparison of the two characteristic curves may be in a gradient or level change. Thus, in addition to the finding of a modified spring stiffness and unwanted collisions, such as cast residues in the oscillation, which cause an additional load or changes in the drive system, can be determined.

In Ausgestaltung der Erfindung ist vorgesehen, dass die Kennlinie jeweils als Funktion des zurückgelegten Wegs und der momentanen Kraft des Oszillationsantriebs aufgezeichnet wird. Diese Aufzeichnung kann dann im Regel- und Diagnose-System des Oszillationsantriebs gespeichert werden.In an embodiment of the invention, it is provided that the characteristic is recorded in each case as a function of the distance covered and the momentary force of the oscillation drive. This record can then be stored in the control and diagnosis system of the oscillation drive.

Weiter ist vorteilhaft, dass die Kennlinie aus den jeweiligen Kammer-Drücken im Zylinder eines oder mehrerer hydraulischen Kolben-Zylinder-Antriebe als Oszillationsantrieb gebildet wird. Dadurch können für die Gesamtheit der Antriebe Durchschnitts-werte gebildet werden. Die Ausführungen können auf das jeweilige Antriebskonzept entsprechend der Anzahl der Kolben-Zylinder-Einheiten angepasst werden.It is also advantageous that the characteristic curve is formed from the respective chamber pressures in the cylinder of one or more hydraulic piston-cylinder drives as oscillation drive. As a result, average values can be formed for the totality of the drives. The designs can be adapted to the respective drive concept according to the number of piston-cylinder units.

Nach anderen Merkmalen ist vorgesehen, dass die datentechnische Aufzeichnung sowie eine grafische oder numerische Darstellung im Regel- und Diagnose-System des Oszillationsantriebs vorgenommen wird. Die Weiterverarbeitung der aufgezeichnet Werte können dabei unmittelbar als Regelwerte wiederum zur Druckregelung eingesetzt werden.According to other features it is provided that the data recording and a graphic or numerical representation in the control and diagnosis system of the oscillation drive is made. The further processing of the recorded values can be used directly as control values for pressure regulation.

Vorteilhaft ist auch, dass die Kennlinie zyklisch erzeugt wird. Dadurch kann eine historische Kennlinien-Veränderung leicht festgestellt werden. Außerdem kann gleichzeitig die Archivierung stattfinden.It is also advantageous that the characteristic curve is generated cyclically. As a result, a historical change in characteristics can be easily determined. In addition, the archiving can take place at the same time.

Eine andere Möglichkeit der Überwachung besteht darin, dass bei erkanntem Federbruch der federnden Führung oder bei Überschreitung einer Maximalkraft oder einer Unterschreitung einer Minimalkraft der Oszillationsantrieb automatisch abgeschaltet wird. Die erforderlichen Grenzwerte können entsprechend dem gegebenen Oszillationssystem bestimmt werden.Another possibility of monitoring is that when detected spring break the resilient guide or when exceeding a maximum force or below a minimum force of the oscillation drive is automatically switched off. The required limits can be determined according to the given oscillation system.

Die Erfindung ermöglicht dem Bediener eine optimale Grundeinstellung oder Ausnutzung der Oszillationsvorrichtung. Dazu ist vorgesehen, dass anhand der Lage einer visualisierten Kennlinie und somit anhand der Ausnutzung der durch die federnde Führung ausgeführten Lastkompensation ein Gut - Zustand der Oszillations-Kennlinie eingestellt wird. Im Vergleich zu den theoretisch ermittelten Daten (Federkonstanten und Gewichtskräfte) kann die optimale Grundeinstellung ermittelt werden. Insbesondere bei Mehrzylinder-Anordnungen können entsprechende Grundeinstellungen, die eine gleiche Lastverteilung als Zielsetzung haben (Verteilung der Kräfte auf alle angeschlossenen Zylinder) vereinfacht durchgeführt werden.The invention allows the operator an optimal basic setting or utilization of the oscillating device. For this purpose, it is provided that a good state of the oscillation characteristic curve is adjusted on the basis of the position of a visualized characteristic curve and thus on the basis of the utilization of the load compensation performed by the resilient guide. In comparison to the theoretically determined data (spring constants and weight forces), the optimal basic setting can be determined. In particular, in multi-cylinder arrangements corresponding basic settings that have an equal load distribution as an objective (distribution of forces on all connected cylinders) can be simplified.

In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt, die nachstehend näher erläutert werden.In the drawings, embodiments of the invention are shown, which are explained in more detail below.

Es zeigen:

Fig. 1
ein Blockschaltbild der Oszillationsvorrichtung in Verbindung mit dem Regel- und Diagnose-System und
Fig. 2
das System der ermittelten Kennlinie, der Sollwerte für die Diagnose in Verbindung mit der Oszillationsvorrichtung als Blockschaltbild.
Show it:
Fig. 1
a block diagram of the oscillating device in conjunction with the control and diagnostic system and
Fig. 2
the system of the determined characteristic curve, the setpoint values for the diagnosis in connection with the oscillating device as a block diagram.

Gemäß Fig. 1 ist eine Oszillationsvorrichtung 1 in einer Stranggießanlage für flüssigen Stahl vorgesehen, mit einer auf einem Hubtisch 2 gelagerten Stranggießkokille 3. Der Hubtisch 2 wird über einen, zwei oder vier Oszillationsantriebe 4 in einer aus Blattfederpaketen bestehenden federnden Führung 5 periodisch auf- und abbewegt, um den erstarrenden Gießstrang aus der Stranggießkokille 3 zu lösen. Die federnde Führung 5 kann auch zur Lastkompensation eingesetzt werden. Die Oszillationsantriebe 4 bestehen im Ausführungsbeispiel aus hydraulischen Kolben-Zylinder-Antrieben 4a mit Kolben 4b.According to Fig. 1 an oscillating device 1 is provided in a continuous casting plant for liquid steel, with a mounted on a lifting table 2 continuous casting mold 3. The lifting table 2 is periodically moved up and down about one, two or four oscillating drives 4 in an existing of leaf spring assemblies resilient guide 5 to the solidifying casting strand from the continuous casting mold 3 to solve. The resilient guide 5 can also be used for load compensation. In the exemplary embodiment, the oscillating drives 4 consist of hydraulic piston-cylinder drives 4a with pistons 4b.

Die Regelung oder Steuerung der Oszillationsantriebe 4 erfolgt über elektronische Regelungs-Systeme, die im wesentlichen eine dynamische Positionssollwert-Einstellung für die Erzeugung eines gewollten periodischen Bewegungsablaufs der Kokillenoszillation für den Gießbetrieb bewirken.The regulation or control of the oscillation drives 4 via electronic control systems, which essentially cause a dynamic position setpoint setting for the generation of a desired periodic movement of Kokillenoszillation for the casting operation.

Diese Bewegungen werden dazu ausgenutzt, dass über schrittweise Positionsänderungen 6 des Oszillationsantriebs 4 eine Kennlinie 8 für den Gut-Zustand aufgezeichnet wird und dass diese danach mit einer dem jeweiligen Zustand im Betrieb entsprechenden (abweichenden) Kennlinie 9 verglichen wird. Die Aufzeichnung erfolgt im Leerlaufzustand (Gießpause) der Stranggießanlage.These movements are exploited to record a characteristic curve 8 for the good state via incremental changes in position 6 of the oscillation drive 4, and to compare this with a characteristic curve 9 (deviating) corresponding to the respective state during operation. The recording takes place in the idling state (casting break) of the continuous casting plant.

Die Kennlinie 8 kann jeweils als Funktion des zurückgelegten Wegs 10 und der momentanen Kraft 11 des Oszillationsantriebs 4 aufgezeichnet werden.The characteristic curve 8 can be recorded in each case as a function of the distance traveled 10 and the instantaneous force 11 of the oscillation drive 4.

Die Kennlinie 8 wird aus dem jeweiligen Druck 12a und 12b im Zylinder 13 eines oder mehrerer hydraulischer Kolben-Zylinder-Antriebe 4a gebildet.The characteristic curve 8 is formed from the respective pressure 12a and 12b in the cylinder 13 of one or more hydraulic piston-cylinder drives 4a.

Diese datentechnische Aufzeichnung 14 (Fig. 2), sowie eine grafische oder numerische Darstellung 15 wird in einem Regel- und Diagnose-System 16 des Oszillationsantriebs 4 abgelegt. Da die Kennlinien 8; 9 zyklisch erzeugt werden, findet eine dauernde Überwachung des Maschinenzustandes statt.This data-log 14 ( Fig. 2 ), as well as a graphical or numerical representation 15 is stored in a control and diagnostic system 16 of the oscillation drive 4. Since the characteristics 8; 9 are generated cyclically, a permanent monitoring of the machine state takes place.

Zwischen einer Änderung der Feder-Kennlinie 18 innerhalb der federnden Führung 5 als veränderte Federsteifigkeit (Abweichung von der Kennlinie 8 oder als Federbruch) können auch auftretende unerwünschte Erscheinungen, wie z.B. Gussreste in der Oszillationsvorrichtung 1, die eine Erhöhung der Grundlast 21 verursachen, oder Veränderungen im Antriebs-System) festgestellt werden.Between a change in the spring characteristic 18 within the resilient guide 5 as a changed spring stiffness (deviation from the characteristic curve 8 or as a spring break) can also occur undesirable phenomena such. Cast residues in the oscillation apparatus 1 causing an increase in the base load 21 or changes in the drive system).

Bei erkanntem Federbruch der federnden Führung 5 oder bei Überschreitung einer Maximalkraft oder einer Unterschreitung einer Minimalkraft wird der Oszillationsantrieb 4 automatisch abgeschaltet.When detected spring break the resilient guide 5 or when exceeding a maximum force or below a minimum force of the oscillation drive 4 is automatically switched off.

Anhand der Lage einer visualisierten Kennlinie 8 oder 9 in der Bild-Darstellung 25 und somit anhand der Ausnutzung der durch die federnde Führung 5 bewirkten Lastkompensation kann ein Gut-Zustand der Oszillations-Kennlinie 8 eingestellt werden.Based on the position of a visualized characteristic 8 or 9 in the image representation 25 and thus based on the utilization of the force caused by the resilient guide 5 load compensation a good state of the oscillation characteristic 8 can be adjusted.

Die Kennlinie 8 für den Gut-Zustand wird über eine hydraulische Druckmessung 22 mittels Drucksensoren 23 jeweils an den Zylinderräumen vor und hinter dem Kolben 4b des Oszillationsantriebs 4 oder in den Druckleitungen 24 aufgenommen. Bei schrittweiser Veränderung 29 Veränderung 28 der Position 6 des Kolbens 4b im Zylinder 13 wird die Bildung der Kennlinien 8; 9 mittels des Regelund Diagnose-Systems 16 automatisch durchfahren ( vgl. "Sollwerte für die Diagnose 27" in Fig. 2). Die für die Erstellung der Kennlinien 8; 9 aufgezeichneten Daten 14 sind jeweils als Bild 25 dargestellt und können parallel gespeichert werden. Beim Archivieren der Daten 14 für die Kennlinien 8; 9 kann das in der Stranggießanlage verwendete Regel- und Diagnose-System 16 eingesetzt werden.The characteristic curve 8 for the good state is recorded via a hydraulic pressure measurement 22 by means of pressure sensors 23 respectively at the cylinder chambers in front of and behind the piston 4b of the oscillation drive 4 or in the pressure lines 24. With gradual change 29 of position 6 of the piston 4b in the cylinder 13, the formation of the characteristic curves 8; 9 automatically pass through the rule and diagnostic system 16 (see "Setpoints for the diagnosis 27" in Fig. 2 ). The for the creation of the curves 8; 9 recorded data 14 are each shown as image 25 and can be stored in parallel. When archiving the data 14 for the characteristic curves 8; 9, the control and diagnostic system 16 used in the continuous casting plant can be used.

Für die Archivierung der Daten 14 bezüglich der Kennlinien 8; 9 kann auch ein externes Datenaufzeichnungs-System eingesetzt werden.For archiving the data 14 with respect to the characteristic curves 8; 9, an external data logging system can also be used.

Das Regel- und Diagnose-System 16 wird zur Übertragung eines Ventilstellwertes 26 über ein Hydraulikventil 22a (Zwei-Wege-Ventil) und die Druckleitungen 24 an den Zylinder 13 angeschlossen. Die Sollwerte 27 für das Regel- und Diagnose-System 16 können als kontinuierliche Vorgabe 28 oder als schrittweise Vorgabe 29 generiert werden.The control and diagnostic system 16 is connected to the cylinder 13 for transmitting a valve control value 26 via a hydraulic valve 22a (two-way valve) and the pressure lines 24. The setpoint values 27 for the control and diagnostic system 16 can be generated as a continuous specification 28 or as a stepwise specification 29.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Oszillationsvorrichtungoscillation
22
HubtischLift table
33
Stranggießkokillecontinuous casting
44
Oszillations-AntriebOscillation drive
4a4a
hydraulischer Kolben-Zylinder-Antriebhydraulic piston-cylinder drive
4b4b
Kolbenpiston
55
federnde Führungresilient guide
66
Positionsänderungposition change
88th
Kennlinie Gut-ZustandCharacteristic good state
99
Betriebs-KennlinieOperating characteristic curve
1010
zurückgelegter Wegdistance traveled
1111
momentane Kraftinstantaneous power
12a12a
Kammer - Druck im ZylinderChamber - pressure in the cylinder
12b12b
Kammer - Druck im ZylinderChamber - pressure in the cylinder
1313
Zylindercylinder
1414
datentechnische Aufzeichnungtechnical data recording
1515
grafische oder numerische Darstellunggraphical or numerical representation
1616
Regel- und Diagnose-SystemControl and diagnostic system
1717
Steigungs- oder Niveau-ÄnderungGradient or level change
1818
Feder-KennlinieSpring characteristic
1919
Verformungs- oder Neigungs-ÄnderungDeformation or tilt change
2020
Niveau-ÄnderungLevel change
2121
Erhöhung der GrundlastIncrease in base load
2222
hydraulische Druckmessunghydraulic pressure measurement
22a22a
Hydraulikventilhydraulic valve
2323
Drucksensorenpressure sensors
2424
Druckleitungpressure line
2525
Bild-DarstellungImage display
2626
VentilstellwertValve control value
2727
Sollwertsetpoint
2828
kontinuierliche Vorgabecontinuous specification
2929
schrittweise VorgabeGradual specification

Claims (7)

  1. Method for recognition of the machine state of elements or subassemblies of an oscillation device (1) in continuous casting plants for liquid metal, particularly for liquid steel, comprising a continuous casting mould (3) mounted on a stroke table (2), wherein the stroke table (2) is periodically moved up and down by way of one or more oscillation drives (4) in a resilient guide (5); and wherein during a pause in casting a characteristic curve (8) for the material state is recorded in the idle state by way of positional changes (6) of the oscillation drive (4) in steps; during a pause in casting a characteristic curve (9) corresponding with the respective state in operation is determined in the idle state by way of positional changes (6) of the oscillation drive (4) in steps; and the characteristic curve (9) representing the respective state in operation is compared with the characteristic curve (8) representing the material state.
  2. Method according to claim 1, characterised in that the characteristic curve (8) is recorded each time as a function of the path (10) covered and the instantaneous force (11) of the oscillation drive (4).
  3. Method according to one of claims 1 and 2, characterised in that the characteristic curve (8) is formed from the respective chamber pressures (12a; 12b) in the cylinder (13) of at least one hydraulic piston-cylinder drive (4a) of the oscillation drive (4).
  4. Method according to any one of claims 1 to 3, characterised in that a data recording (14) as well as a graphical or numerical representation (14) in a regulating and diagnostic system (16) of the oscillation drive (4) are carried out.
  5. Method according to any one of claims 1 to 4, characterised in that the characteristic curve (8; 9) is generated cyclically.
  6. Method according to any one of claims 1 to 5, characterised in that the oscillation drive (4) is automatically switched off in the case of recognition of spring breakage of the resilient guide (5) or in the case of exceeding a maximum force or falling below a minimum force.
  7. Method according to any one of claims 1 to 6, characterised in that a material state of the oscillation characteristic curve (8) is set on the basis of the position of a visualised characteristic curve (8; 9) and thus on the basis of utilisation of the load compensation executed by the resilient guide (5).
EP03005200A 2002-04-30 2003-03-08 Method and apparatus for recognition of the condition of components or assemblies of a oscillation unit in continuous casting machines for liquid metals, in particular for liquid steels Expired - Lifetime EP1358955B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10219287A DE10219287A1 (en) 2002-04-30 2002-04-30 Method and device for recognizing the machine status of elements or assemblies of an oscillation device in continuous casting plants for liquid metals, in particular for liquid steel
DE10219287 2002-04-30

Publications (2)

Publication Number Publication Date
EP1358955A1 EP1358955A1 (en) 2003-11-05
EP1358955B1 true EP1358955B1 (en) 2008-07-09

Family

ID=28798935

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03005200A Expired - Lifetime EP1358955B1 (en) 2002-04-30 2003-03-08 Method and apparatus for recognition of the condition of components or assemblies of a oscillation unit in continuous casting machines for liquid metals, in particular for liquid steels

Country Status (4)

Country Link
EP (1) EP1358955B1 (en)
AT (1) ATE400380T1 (en)
DE (2) DE10219287A1 (en)
ES (1) ES2306820T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014202404A1 (en) 2014-02-11 2015-08-13 Sms Siemag Ag Oscillation device for a continuous casting mold and various test methods

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008006189A1 (en) 2008-01-26 2009-07-30 Sms Demag Ag Device and method for regulating mold oscillations

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19515316C1 (en) * 1995-04-19 1996-08-29 Mannesmann Ag Method for operating a mold
DE19845357A1 (en) * 1998-10-02 2000-04-06 Schloemann Siemag Ag Method and device for the continuous control of the basic setting and oscillation parameters of a continuous casting mold
DE10033656A1 (en) * 2000-07-11 2002-01-24 Sms Demag Ag Method and continuous casting device with a device for measuring the mold level for liquid metal, in particular for liquid steel
DE10110081A1 (en) * 2001-03-02 2002-09-05 Sms Demag Ag Method for determining characteristics of an oscillating system of an oscillating continuous casting mold

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014202404A1 (en) 2014-02-11 2015-08-13 Sms Siemag Ag Oscillation device for a continuous casting mold and various test methods

Also Published As

Publication number Publication date
DE50310094D1 (en) 2008-08-21
DE10219287A1 (en) 2003-11-13
EP1358955A1 (en) 2003-11-05
ATE400380T1 (en) 2008-07-15
ES2306820T3 (en) 2008-11-16

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