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EP0177796B1 - Method of and installation for guiding and straightening a cast strand in the straight- and outlet region of a curved continuous casting plant - Google Patents

Method of and installation for guiding and straightening a cast strand in the straight- and outlet region of a curved continuous casting plant Download PDF

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Publication number
EP0177796B1
EP0177796B1 EP85111577A EP85111577A EP0177796B1 EP 0177796 B1 EP0177796 B1 EP 0177796B1 EP 85111577 A EP85111577 A EP 85111577A EP 85111577 A EP85111577 A EP 85111577A EP 0177796 B1 EP0177796 B1 EP 0177796B1
Authority
EP
European Patent Office
Prior art keywords
straightening
rollers
hydraulic
opposite
continuous casting
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.)
Expired
Application number
EP85111577A
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German (de)
French (fr)
Other versions
EP0177796A2 (en
EP0177796A3 (en
Inventor
Hans Streubel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Schloemann Siemag AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SMS Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Priority to AT85111577T priority Critical patent/ATE39864T1/en
Publication of EP0177796A2 publication Critical patent/EP0177796A2/en
Publication of EP0177796A3 publication Critical patent/EP0177796A3/en
Application granted granted Critical
Publication of EP0177796B1 publication Critical patent/EP0177796B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1226—Accessories for subsequent treating or working cast stock in situ for straightening strands

Definitions

  • the invention relates to a method for guiding and straightening a casting strand in the straightening and outlet area of a continuous sheet casting installation, wherein oppositely arranged rollers are held at a distance corresponding to the casting format by a spring force against the ferrostatic pressure.
  • the invention relates to a device for performing the method.
  • a movable roller crossbeam is held in a position corresponding to the format in relation to a stationary roller crossbeam by disc springs against the ferrostatic pressure.
  • the casting strand can have areas of increased strength, in particular at the beginning and end, due to greater cooling. If the adjustment crossbar is pressed on by an area of increased strength, the steep spring characteristic leads to a strong increase in force. This leads to jamming of the casting strand and overloading of individual rolls, particularly in the straightening and outlet area of the continuous casting plant. If the jamming leads to a standstill of the outfeed, the plate springs must be compressed further by an additional force and the movable roller crossbar raised to relieve the load.
  • the object of the invention is to provide a method and a device for guiding and straightening a casting strand, jamming due to casting strand regions of increased strength being avoided and the roller load being considerably reduced.
  • the object is achieved according to the invention in that a cast strand region of increased strength is traced away and when it passes between the opposite rollers the respective spring force is reduced by a lower additional force.
  • a control system for carrying out the method consists of a continuous casting process computer, a path and control computer and a hydraulic control with connected hydraulic power devices.
  • the casting sequence data represented by the continuous casting process computer in particular about casting strand areas of increased strength, are passed to the sequence and control computer, which transmits signals to the hydraulic power devices to the hydraulic control system in accordance with the continuous conveying.
  • 1 consists of a continuous casting process computer 1, a path and control computer 2 and a hydraulic control 3, from which hydraulic power devices 4 are applied by strand guiding elements 5 when passing through a casting strand region of increased strength.
  • each hollow column 11 there is a spring sleeve 13, the bottom part 14 of which is fastened to the fixed crossbar 7 by means of bolts 15.
  • a tie rod 16 is clamped by means of plate springs 17. The tie rod 16 is guided in the base piece 14 and in an upper sleeve cover 18.
  • Spindle lifting elements 19 are arranged on the adjustment crossmember 9, the spindles of which are connected to a head 22 fastened to the tie rod 16 via a fork piece 20 and a bolt 21.
  • a hydraulic nut 23 is arranged between the upper sleeve cover 18 and the head 22.
  • a tie rod 24 is clamped within a spring sleeve 27 by means of two helical springs 25, 26 acting in parallel.
  • Each coil spring 25, 26 acts within the Spring sleeve 27 against its own abutment surface 28 or 29.
  • a base piece 30 of the spring sleeve 27 is designed as a hydraulic cylinder, the piston 31 of which acts against the tie rod 24 when acted upon.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Abstract

1. Method for the guiding and straightening of a continuously cast billet in the straightening and outlet region of a curved continuous casting plant, wherein rollers arranged to lie one opposite the other are held at a spacing corresponding to the casting format by a spring force against the ferrostatic pressure of the continuously cast billet, characterised thereby, that a continuously cast billet region of increased strength is tracked in its travel and, on its passage between the rollers lying one opposite the other, the respective spring force is reduced by a smaller additional force.

Description

Die Erfindung betrifft ein Verfahren zum Führen und Richten eines Gießstranges im Richt- und Auslaufbereich einer Bogenstranggießanlage, wobei gegenüberliegend angeordnete Rollen von einer Federkraft gegen den ferrostatischen Druck in einem dem Gießformat entsprechenden Abstand gehalten werden. Darüber hinaus betrifft die Erfindung eine Vorrichtung zur Durchführung des Verfahrens.The invention relates to a method for guiding and straightening a casting strand in the straightening and outlet area of a continuous sheet casting installation, wherein oppositely arranged rollers are held at a distance corresponding to the casting format by a spring force against the ferrostatic pressure. In addition, the invention relates to a device for performing the method.

Bei diesem bekannten Verfahren (DE-A 2 942 144) wird eine bewegliche Rollentraverse gegenüber einer ortsfesten Rollentraverse durch Tellerfedern gegen den ferrostatischen Druck in einer dem Format entsprechenden Position gehalten. Der Gießstrang kann insbesondere am Anfang und Ende durch stärkere Abkühlung Bereiche erhöhter Festigkeit aufweisen. Wird nun durch einen Bereich erhöhter Festigkeit die Verstelltraverse aufgedrückt, so kommt es infolge der steilen Federkennlinie zu einem starken Kraftanstieg. Dies führt insbesondere im Richt- und Auslaufbereich der Stranggießanlage zur Verklemmung des Gießstranges und zur Überlastung einzelner Rollen. Führt die Verklemmung zu einem Ausförderstillstand so müssen die Tellerfedern durch eine zusätzliche Kraft weiter zusammengedrückt und die bewegliche Rollentraverse entlastend hochgefahren werden.In this known method (DE-A 2 942 144), a movable roller crossbeam is held in a position corresponding to the format in relation to a stationary roller crossbeam by disc springs against the ferrostatic pressure. The casting strand can have areas of increased strength, in particular at the beginning and end, due to greater cooling. If the adjustment crossbar is pressed on by an area of increased strength, the steep spring characteristic leads to a strong increase in force. This leads to jamming of the casting strand and overloading of individual rolls, particularly in the straightening and outlet area of the continuous casting plant. If the jamming leads to a standstill of the outfeed, the plate springs must be compressed further by an additional force and the movable roller crossbar raised to relieve the load.

Durch die DE-A-2 747 000 ist ein Verfahren zur Feststellung und Beseitigung einer ungenauen Spaltweite zwischen Walzenpaaren bekannt, wobei die zwischen Walzenpaar und Strang auftretende Kraft gemessen und bei Abweichung von einem Nennwert der Spalt durch eine Einstellvorrichtung nach dem Auslauf eines Gießstranges korrigiert wird. Auch hierbei ist eine Anpassung an über die Gießstranglänge unterschiedliche Festigkeitswerte nicht möglich.From DE-A-2 747 000 a method for determining and eliminating an inaccurate gap width between pairs of rolls is known, the force occurring between the pair of rolls and the strand being measured and, in the event of a deviation from a nominal value, the gap being corrected by an adjusting device after the discharge of a casting strand . Here too, it is not possible to adapt to different strength values over the length of the casting strand.

Aufgabe der Erfindung ist die Schaffung eines Verfahrens und einer Vorrichtung zum Führen und Richten eines Gießstranges, wobei Verklemmungen durch Gießstrangbereiche erhöhter Festigkeit vermieden und die Rollenbelastung erheblich reduziert wird.The object of the invention is to provide a method and a device for guiding and straightening a casting strand, jamming due to casting strand regions of increased strength being avoided and the roller load being considerably reduced.

Die gestellte Aufgabe wird erfindungsgemäß dadurch gelöst, daß ein Gießstrangbereich erhöhter Festigkeit wegverfolgt wird und bei dessen Durchlauf zwischen den gegenüberliegenden Rollen die jeweilige Federkraft durch eine geringere Zusatzkraft reduziert wird.The object is achieved according to the invention in that a cast strand region of increased strength is traced away and when it passes between the opposite rollers the respective spring force is reduced by a lower additional force.

Auf diese Weise kann ein Verklemmen von Gießstrangbereichen erhöhter Festigkeit in der Strangführung und damit eine Überlastung von Rollen vermieden werden.In this way, jamming of strand sections of increased strength in the strand guide and thus overloading of rollers can be avoided.

Ein Steuersystem zur Durchführung des Verfahrens besteht gemäß einem weiteren Merkmal der Erfindung aus einem Stranggießprozeßrechner, einem Wegfolge- und Steuerungsrechner und einer Hydrauliksteuerung mit angeschlossenen hydraulischen Kraftgeräten. Die vom Stranggießprozeßrechner dargestellten Gießablaufdaten insbesondere über Gießstrangbereiche erhöhter Festigkeit werden an den Wegfolge- und Steuerungsrechner geleitet, der entsprechend der Strangförderung an die Hydrauliksteuerung Signale zur Beaufschlagung der hydraulischen Kraftgeräte übermittelt.According to a further feature of the invention, a control system for carrying out the method consists of a continuous casting process computer, a path and control computer and a hydraulic control with connected hydraulic power devices. The casting sequence data represented by the continuous casting process computer, in particular about casting strand areas of increased strength, are passed to the sequence and control computer, which transmits signals to the hydraulic power devices to the hydraulic control system in accordance with the continuous conveying.

Weitere vorrichtungsmäßige Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.Further device-like configurations of the invention result from the subclaims.

In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt. Es zeigen :

  • Fig. 1 ein Steuersystem zur Durchführung des Verfahrens,
  • Fig. 2 ein Strangführungselement im Richt- und Auslaufbereich einer Stranggießanlage und
  • Fig. 3 eine aus Zuganker und Druckfeder bestehende alternative Verbindungseinheit.
Exemplary embodiments of the invention are shown in the drawing. Show it :
  • 1 shows a control system for performing the method,
  • Fig. 2 is a strand guiding element in the straightening and outlet area of a continuous caster and
  • Fig. 3 is an alternative connecting unit consisting of tie rod and compression spring.

Das Steuersystem gemäß Fig. 1 besteht aus einem Stranggießprozeßrechner 1, einem Wegfolge- und Steuerungsrechner 2 und einer Hydrauliksteuerung 3, von der aus hydraulische Kraftgeräte 4 von Strangführungselementen 5, beim Durchlauf eines Gießstrangbereichs erhöhter Festigkeit beaufschlagt werden.1 consists of a continuous casting process computer 1, a path and control computer 2 and a hydraulic control 3, from which hydraulic power devices 4 are applied by strand guiding elements 5 when passing through a casting strand region of increased strength.

In dem Strangführungselement gemäß Fig. 2 sind fünf untere Rollen 6 an einer Festtraverse 7 und fünf obere Rollen 8 ah einer Verstelltraverse 9 gelagert, wobei jeweils eine mittlere Rolle angetrieben ist, die an der Verstelltraverse 9 durch Druckmittelzylinder 10 anstellbar sind. An der Festtraverse 7 sind vier Hohlsäulen 11 ange- . bracht, an deren Innenseiten die Verstelltraverse 10 mittels Gleitstücken 12 geführt ist.In the strand guide element according to FIG. 2, five lower rollers 6 are mounted on a fixed crossbeam 7 and five upper rollers 8 ah on an adjustable crossbeam 9, each of which a middle roller is driven, which can be adjusted on the adjustable crossbeam 9 by pressure medium cylinders 10. Four hollow columns 11 are attached to the fixed crossbeam 7. brings, on the inside of the cross member 10 is guided by means of sliders 12.

In jeder Hohlsäule 11 befindet sich eine Federhülse 13, deren Bodenstück 14 mittels Bolzen 15 an der Festtraverse 7 befestigt sind. In jeder Federhülse 13 ist ein Zuganker 16 mittels Tellerfedern 17 verspannt. Der Zuganker 16 ist im Bodenstück 14 und in einem oberen Hülsendeckel 18 geführt.In each hollow column 11 there is a spring sleeve 13, the bottom part 14 of which is fastened to the fixed crossbar 7 by means of bolts 15. In each spring sleeve 13, a tie rod 16 is clamped by means of plate springs 17. The tie rod 16 is guided in the base piece 14 and in an upper sleeve cover 18.

Auf der Verstelltraverse 9 sind Spindelhubelemente 19 angeordnet, deren Spindeln über ein Gabelstück 20 und einen Bolzen 21 mit einem an dem Zuganker 16 befestigten Kopf 22 verbunden ist. Zwischen dem oberen Hülsendeckel 18 und dem Kopf 22 ist eine Hydraulikmutter 23 angeordnet.Spindle lifting elements 19 are arranged on the adjustment crossmember 9, the spindles of which are connected to a head 22 fastened to the tie rod 16 via a fork piece 20 and a bolt 21. A hydraulic nut 23 is arranged between the upper sleeve cover 18 and the head 22.

Sobald ein Gießstrangbereich erhöhter Festigkeit das Strangführungselement erreicht, werden die Hydraulikmuttern 23 von der Hydrauliksteuerung 3 beaufschlagt. Dadurch wird die vom Zuganker 16 auf die Verstelltraverse 9 übertragene Zuhaltekraft reduziert. Falls der Gießstrangbereich erhöhter Festigkeit die Verstelltraverse 9 aufdrückt, können die aufgrund der Federkennlinie ansteigenden Zuhaltkräfte nicht zu einer Überlastung der Rollen 6, 8 führen.As soon as a cast strand region of increased strength reaches the strand guide element, the hydraulic nuts 23 are acted upon by the hydraulic control 3. As a result, the locking force transmitted from the tie rod 16 to the adjustment crossbeam 9 is reduced. If the cast strand area of increased strength presses on the adjustment crossbar 9, the locking forces increasing due to the spring characteristic cannot lead to an overload of the rollers 6, 8.

Bei dem in Fig. 3 dargestellten alternativen Verbidnungselement ist ein Zuganker 24 mittels zweier parallelwirkender Schraubenfedern 25, 26 innerhalb einer Federhülse 27 verspannt. Dabei wirkt jede Schraubenfeder 25, 26 innerhalb der Federhülse 27 gegen eine eigene Anschlagfläche 28 bzw. 29. Ein Bodenstück 30 der Federhülse 27 ist als Hydraulikzylinder ausgebildet, dessen Kolben 31 bei Beaufschlagung gegen den Zuganker 24 wirkt.In the alternative connecting element shown in FIG. 3, a tie rod 24 is clamped within a spring sleeve 27 by means of two helical springs 25, 26 acting in parallel. Each coil spring 25, 26 acts within the Spring sleeve 27 against its own abutment surface 28 or 29. A base piece 30 of the spring sleeve 27 is designed as a hydraulic cylinder, the piston 31 of which acts against the tie rod 24 when acted upon.

Claims (5)

1. Method for the guiding and straightening of a continuously cast billet in the straightening and outlet region of a curved continuous casting plant, wherein rollers arranged to lie one opposite the other are held at a spacing corresponding to the casting format by a spring force against the ferrostatic pressure of the continuously cast billet, characterised thereby, that a continuously cast billet region of increased strength is tracked in its travel and, on its passage between the rollers lying one opposite the other, the respective spring force is reduced by a smaller additional force.
2. Control system for the performance of the method according to claim 1, characterised by a continuous casting process computer (1), a travel-tracking and control computer (2) and an hydraulic control (3) with connected hydraulic force devices (4).
3. Device for the performance of the method according to claim 1, wherein rollers (6, 8) are borne to lie one opposite the other in stages at a fixed located crossbeam (7) and at an adjustable crossbeam (9) respectively and are kept at format spacing by tension rods (16) loaded by compression springs (17) within sleeves (13), wherein hydraulic force devices are associated with the tension rods, characterised thereby, that an hydraulic nut (23) is arranged between a sleeve cover (18) and a tension rod head (22).
4. Device for the performance of the method according to claim 1, wherein rollers (6, 8) are borne to lie one opposite the other in stages at a fixed located crossbeam (7) and at an adjustable crossbeam (9) respectively and are kept at format spacing by tension rods (24) loaded by compression springs (25, 26) within sleeves (27), wherein hydraulic force devices are associated with the tension rods, characterised thereby, that a base piece (30) of the spring sleeve (27) is constructed as hydraulic cylinder, the piston (31) of which is directed to the tension rod (24).
5. Device according to claim 3 or 4, characterised thereby, that two helical springs (25, 26), with each of which a respective individual abutment surface (28, 29) is associated within the spring sleeve, are arranged on the tension rod (24) within the spring sleeve (27).
EP85111577A 1984-10-10 1985-09-13 Method of and installation for guiding and straightening a cast strand in the straight- and outlet region of a curved continuous casting plant Expired EP0177796B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85111577T ATE39864T1 (en) 1984-10-10 1985-09-13 METHOD AND DEVICE FOR GUIDING AND ADJUSTING A CASTING STRAND IN THE ADJUSTMENT AND OUTLET AREA OF AN ARCH-CUSHED CONTINUOUS CASTING PLANT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843437178 DE3437178A1 (en) 1984-10-10 1984-10-10 METHOD AND DEVICE FOR GUIDING AND Straightening a Casting Line in the Straightening and Discharge Area of an Arch Continuous Casting System
DE3437178 1984-10-10

Publications (3)

Publication Number Publication Date
EP0177796A2 EP0177796A2 (en) 1986-04-16
EP0177796A3 EP0177796A3 (en) 1987-03-25
EP0177796B1 true EP0177796B1 (en) 1989-01-11

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EP85111577A Expired EP0177796B1 (en) 1984-10-10 1985-09-13 Method of and installation for guiding and straightening a cast strand in the straight- and outlet region of a curved continuous casting plant

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EP (1) EP0177796B1 (en)
JP (1) JPS6192766A (en)
AT (1) ATE39864T1 (en)
DE (2) DE3437178A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002083340A2 (en) * 2001-04-14 2002-10-24 Sms Demag Aktiengesellschaft Increase in format thickness for thin slab continuous casting systems
US6612364B2 (en) 2000-03-10 2003-09-02 Demag Aktiengesellschaft Continuous casting method with soft reduction

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02148758U (en) * 1989-05-12 1990-12-18

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2133144B2 (en) * 1971-07-03 1973-09-27 Concast Ag, Zuerich (Schweiz) Method and device for conveying and straightening a strand in a continuous casting plant
US4056140A (en) * 1976-10-20 1977-11-01 United States Steel Corporation Method and mechanism for controlling forces in a continuous-casting machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6612364B2 (en) 2000-03-10 2003-09-02 Demag Aktiengesellschaft Continuous casting method with soft reduction
WO2002083340A2 (en) * 2001-04-14 2002-10-24 Sms Demag Aktiengesellschaft Increase in format thickness for thin slab continuous casting systems
WO2002083340A3 (en) * 2001-04-14 2002-12-19 Sms Demag Ag Increase in format thickness for thin slab continuous casting systems

Also Published As

Publication number Publication date
DE3567392D1 (en) 1989-02-16
EP0177796A2 (en) 1986-04-16
DE3437178A1 (en) 1986-04-10
JPS6192766A (en) 1986-05-10
ATE39864T1 (en) 1989-01-15
EP0177796A3 (en) 1987-03-25

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