EP1993748B1 - Method for the operation of a rolling mill used for milling a strip-shaped rolling stock - Google Patents

Method for the operation of a rolling mill used for milling a strip-shaped rolling stock Download PDF

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Publication number
EP1993748B1
EP1993748B1 EP07704306A EP07704306A EP1993748B1 EP 1993748 B1 EP1993748 B1 EP 1993748B1 EP 07704306 A EP07704306 A EP 07704306A EP 07704306 A EP07704306 A EP 07704306A EP 1993748 B1 EP1993748 B1 EP 1993748B1
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EP
European Patent Office
Prior art keywords
control device
strip
rolling
rolling stock
peripheral speed
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EP07704306A
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German (de)
French (fr)
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EP1993748A1 (en
Inventor
Birger Schmidt
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Siemens AG
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Siemens AG
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Priority to PL07704306T priority Critical patent/PL1993748T3/en
Publication of EP1993748A1 publication Critical patent/EP1993748A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2273/00—Path parameters
    • B21B2273/04—Lateral deviation, meandering, camber of product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2273/00—Path parameters
    • B21B2273/12—End of product
    • B21B2273/14—Front end or leading end
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2275/00—Mill drive parameters
    • B21B2275/02—Speed
    • B21B2275/04—Roll speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2275/00—Mill drive parameters
    • B21B2275/02—Speed
    • B21B2275/06—Product speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/68—Camber or steering control for strip, sheets or plates, e.g. preventing meandering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/72—Rear end control; Front end control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
    • B21B39/12—Arrangement or installation of roller tables in relation to a roll stand

Definitions

  • the present invention relates to an operation method for a rolling mill for rolling a strip-shaped rolling stock having an initial edge with two ends.
  • the rolling mill has a roll stand with work rolls, an input side of the roll stand arranged roller table and a control device.
  • the work rolls form a nip.
  • the controller controls the rolling stand so that the work rolls of the rolling stand rotate at a peripheral speed.
  • the control device further controls the input side of the rolling stand arranged roller table such that the initial edge of the strip-shaped rolling stock reaches the nip with an inlet speed.
  • the present invention further relates to a data carrier having a computer program stored on the data carrier for carrying out such an operating method when the computer program is executed by a control device for a rolling mill. Also, the present invention relates to a control device for a rolling mill, which is designed, in particular programmed, that the rolling mill can be controlled by it according to such an operating method.
  • the present invention relates to a rolling mill for rolling a strip-shaped rolling stock having a rolling stand with work rolls, a roller arranged on the roll side roller table and a control device, wherein the work rolls form a roll gap and the rolling mill and arranged on the input side of the roll stand of the control device such are controllable, that the work rolls of the rolling stand rotate at a peripheral speed and reaches an initial edge of the strip-shaped rolling stock, the roll gap with an inlet speed.
  • the present invention also relates to a strip-shaped rolling stock having an initial edge with two ends and rolled according to an operating method described above.
  • the rolling stock When rolling strip-shaped rolling stock, the rolling stock is fed to the roll stand usually with an entry speed which is smaller than the peripheral speed of the work rolls of the roll stand. With the arrival of the leading edge of the rolling stock in the nip of the roll gap is closed and rolled the rolled stock.
  • the above operating mode represents the theoretical ideal case in which the initial edge is aligned parallel to the nip and thus enters the nip. In practice, however, it may happen that the two ends of the leading edge run into the nip one after the other, that is to say the initial edge has a skewed position relative to the nip. In this case, there is a so-called diagonal delay, on the one hand leads to an excess width of the rolling stock, on the other hand imprints the rolling stock in the form of a parallelogram. Both effects reduce the so-called spreading, that is the proportion of usable Walzgutvolumen.
  • the guide rulers are made laterally to the strip-shaped rolling stock. They align the strip-shaped rolling stock in such a way that the starting edge is oriented parallel to the nip. Purely by way of example is on the DE 31 16 278 A1 , the EP 0 925 854 A2 and the EP 0 166 981 A1 directed.
  • the alignment of the rolling stock is time-consuming and adversely affects the productivity of the rolling mill. Furthermore, the alignment is particularly poorly possible if the strip-shaped rolling has a large width-length ratio. In addition, there is a risk that the rolling stock between even with proper alignment of the rolling stock the alignment by the guide rulers and the shrinkage in the nip again rotated, so that in spite of the guide rulers an imbalance of the leading edge relative to the nip occurs. The risk of twisting of the rolling stock is greater, the greater the ratio of width to length of the strip-shaped rolling stock and the smaller the ratio of length of the strip-shaped rolling stock to distance of the transport rollers of the input side of the rolling mill arranged roller table.
  • the object of the present invention is to improve an operation method for a rolling mill for rolling strip-shaped rolling stock so as to increase productivity and yield.
  • the object is, starting from an operating method of the type mentioned, achieved in that the inlet speed is greater than the peripheral speed and the control device, the peripheral speed and the inlet velocity such a tuned that due to the vote of the peripheral speed and the inlet velocity successive any imbalance the starting edge is at least reduced relative to the nip.
  • this object is also achieved in that a corresponding computer program is stored on the data carrier or that the control device for the rolling mill is designed accordingly, in particular programmed.
  • the object is achieved in that the inlet speed is greater than the peripheral speed and the peripheral speed and the inlet speed of the control device are tuned to one another such that due to the vote of the peripheral speed and the inlet speed to each other a possible skew of the leading edge relative to the nip at least reduced.
  • control means prefferably match the peripheral speed and the lead-in speed such that the strip-shaped rolling rotates around the end first reaching the roll gap in case one of the ends of the leading edge reaches the other end of the leading edge , The gap later reaching the end of the leading edge thus slips on the nip. This procedure is generally preferable.
  • control device the circumferential speed and the lead-in speed tuned to each other so that the strip-shaped rolling in the case that one of the ends of the leading edge before the other of the ends of the leading edge reaches the nip, with the nip first reaching end rebounds from the nip.
  • a particularly accurate coordination of the peripheral speed and the inlet speed to each other is required so that the strip-shaped rolling material does not rebound too far.
  • the operating method according to the invention can also be used in particular in existing rolling mills, that is to say in rolling mills which have the guiding rulers mentioned above.
  • These guide rulers are usually adjustable to the rolling stock.
  • the control device preferably controls the guide rulers in such a way that they do not touch the strip-shaped rolling stock.
  • the control device preferably accepts characteristic sizes of the strip-shaped rolling stock and of the rolling mill and calculates the circumferential speed and the entry speed on the basis of the characteristic variables in a model.
  • characteristic sizes of the rolling stock come in particular the length, the width, the thickness and the mass of the rolling stock in question.
  • the characteristic variables of the rolling mill are in particular the distance of individual transport rollers of the roller table, the nip and the diameter of the work rolls in question.
  • the control device preferably checks on the basis of the characteristic variables whether an execution condition is met. Only when the execution condition is satisfied, the controller adjusts the peripheral speed and the lead-in speed to each other in accordance with the method described above. On the other hand, if the execution condition is not satisfied, the controller adjusts the peripheral speed and the lead-in speed to each other so that any skew of the leading edge relative to the roll gap is not reduced due to the matching of the peripheral speed and the lead-in speed. A possible skew of the leading edge relative to the nip is thus possibly reduced, but not due to the vote of the peripheral speed and the inlet speed each other. This vote in this case has no influence on reducing the imbalance.
  • the execution condition can take various sizes. Preferably in the execution condition, a length of the strip-shaped rolling stock, a width of the strip-shaped rolling stock, a ratio of length and width of the strip-shaped rolling stock and / or a mass of the strip-shaped rolling stock.
  • the roller table arranged on the input side roller table can have guide rulers, which can be adjusted laterally against the strip-shaped rolling stock. If the execution condition is not met, the control device preferably adjusts the guide rulers so that they touch the strip-shaped rolling stock.
  • the strip-shaped rolling stock is thus in this case either according to the invention Method or according to the conventional method (ie, by the guide rulers) aligned.
  • a rolling mill has a rolling stand 1, two roller tables 2, 3, guide rails 4 and a control device 5.
  • the roll stand 1 has at least two work rolls 6, as a rule also further rolls 7, for example two support rolls 7.
  • the rolling mill is used for rolling a strip-shaped rolling stock 8.
  • the roller tables 2, 3 each have a number of transport rollers 9, which are spaced apart by a distance a.
  • the guide rulers 4 are arranged on the input side roller table 2. You can be adjusted laterally to the rolling stock 8.
  • the control device 5 serves to control and coordinate the roll stand 1, the guide rails 4 and the transport rollers 9 of the roller tables 2, 3.
  • the control device 5 is supplied via a data carrier 10, on which a computer program 11 is stored, this computer program 11.
  • the control device 5 takes over the computer program 11 and stores it in an internal memory 12.
  • the control device 5 is programmed (or formed more generally) in such a way that when the computer program is called up 11 operates the rolling mill according to an operating method, which is described below in connection with FIG. 3 is explained in more detail.
  • FIG. 3 takes the control device 5 in a step S1 initially characteristic sizes of the rolling stock 8 against.
  • the characteristic sizes of the rolling stock 8 include in particular its length 1, its width b, its thickness d, its mass m, its temperature T and its material composition Z.
  • the control device 5 in the context of step S1 also other sizes of the rolled material 8 fed become.
  • control device 5 also receives characteristic variables of the rolling mill.
  • the characteristic sizes of the rolling mill include in particular the diameter of the work rolls 6 and the distance a of the transport rollers 9 from each other.
  • control device 5 receives characteristic variables of the desired rolling operation.
  • the characteristic variables of the desired rolling operation include, in particular, a reduction in the stitching ⁇ and a desired rolling speed vW.
  • the reduction in value ⁇ can alternatively be specified as an absolute or as a relative reduction in the number of passes.
  • the control device 5 determines in a step S4 by means of a model 13 in a conventional manner stand settings for the rolling stand 1.
  • the framework settings include in particular a roll gap, g and a peripheral speed vU of the work roll 6 of the rolling stand 1.
  • the roll gap g is a function of the width b, the thickness d, the temperature T, the material composition Z, the desired reduction in the number of stitches ⁇ , the framework stiffness and optionally other variables.
  • the peripheral speed vU of the work rolls 6 is in particular a function of the thickness d, the reduction ⁇ , the rolling speed vW, the nip g and optionally other sizes.
  • steps S5 to S8 the controller 5 checks if various conditions are satisfied. Steps S5 to S8 do not all have to exist. In particular, step S8 could possibly be omitted. However, at least one of the steps S5 to S7 must be present. The most important step should probably be step S5.
  • step S5 the control device 5 first checks whether the length l of the rolling stock 8 is below a limit length L.
  • the limit length L is preferably a multiple of the distance a of the transport rollers 9 from each other, for example, five to ten times.
  • step S6 the control device 5 checks whether the width b of the rolling stock 8 exceeds a limit width B.
  • the border width B is preferably also a multiple of the distance a of the transport rollers 9 from each other.
  • step S7 the control device 5 checks whether the ratio of width b to length 1 of the rolling stock 8 is above a threshold S.
  • the threshold S usually has a value that is greater than two. In general, he is even larger than three.
  • step S8 the control device 5 checks whether the mass m of the rolling stock 8 is below a limit mass M.
  • steps S5 to S8 can in principle be linked together in any desired manner, for example by means of a logical OR operation. According to FIG. 3 they are AND-linked.
  • control device 5 carries out steps S9 to S12.
  • step S9 the control device 5 in the model 13 determines an intake speed vE.
  • the entry speed vE is the speed at which an initial edge 14 of the Walzguts 8 reaches the nip g. It is greater than the peripheral speed vU of the work rolls 6 of the rolling stand 1 when determined in step S9.
  • step S10 the control device 5, the guide rulers 4 from the rolling stock 8 from. It sets the guide ruler 4 so that they do not touch the rolling stock 8.
  • step S11 the control device 5 controls the rolling stand 1 in such a way that the framework settings determined in step S4 are set. In particular, the control device 5 controls the roll stand 1 in such a way that the work rolls 6 form the roll gap g and that the work rolls 6 rotate with the peripheral speed vU.
  • step S12 the control device 5 controls the roller table 2 arranged on the input side in such a way that the starting edge 14 of the rolling stock 8 enters the roll gap g at the entry speed vE.
  • the leading edge 14 of the rolled stock 8 has two ends 15, 16.
  • the leading edge 14 is aligned parallel to the nip gap g and so enters the nip g.
  • both ends 15, 16 reach the roll gap g at the same time.
  • the starting edge 14 usually reaches one of the ends 15, 16 of the leading edge 14, here the end 15, before the other of the ends 15, 16 of the leading edge 14, here the end 16, the roll gap g.
  • the starting edge 14 therefore has a skew relative to the nip g.
  • the control device 5 determines the entry speed vE in the context of step S9 such that, due to the coordination of the peripheral speed vU and the entry speed vE, such a skew of the starting edge 14 relative to the nip g is at least reduced.
  • the entry speed vE is a function that can depend on the length 1, the width b, the thickness d and the mass m of the rolling stock 8, the peripheral speed vU, the distance a and possibly also of other sizes.
  • the functional relationship the inlet velocity vE can be determined on the basis of theoretical considerations and / or experimentally.
  • the lead-in speed vE is usually determined by the control device 5 in such a way that the work rolls 6 hold the end 15 which first reaches the roll gap g, but due to the inertia of the rolled stock 8, the rolled stock 8 slips onto the work rolls 6 on the transport rolls 9 ,
  • the control device 5 adjusts the peripheral speed vU and the entry speed vE to one another in such a way that the strip-shaped rolling stock 8 in this case rotates about the end 15 which first reaches the roll gap g.
  • This procedure is in FIG. 4 schematically indicated by an arrow 17.
  • the vote of the peripheral speed vU and the lead-in speed vE on each other by the control device 5 is made such that the strip-shaped rolling 8 in the case that one of the ends 15, 16 of the leading edge 14 (here the end 15) before the other of the ends 15, 16 of the leading edge 14 (here the end 16) reaches the nip g, with the nip g first reaching the end 15 rebounds from the nip g.
  • FIG. 5 schematically indicated by arrows 18, 19, wherein the arrow 18 is greater than the arrow 19.
  • controller 5 executes steps S13 and S14 instead of steps S9 and S10.
  • step S13 the control device 5 - analogous to step S9 - determines the inlet velocity vE. However, it determines the entry speed vE in the context of step S13, but in such a way that any skew of the starting edge 14 relative to the nip gap g is not reduced to one another due to the coordination of the peripheral speed vU and the entry speed vE.
  • the inlet velocity vE can therefore be smaller than the circumferential velocity vU, in particular. However, it can still be a function of the length 1, the width b, the mass m, the thickness d, the peripheral speed vU and possibly other variables such as the distance a of the transport rollers 9 from each other.
  • step S14 the control device 5 adjusts the guide rulers 4 to the rolling stock 8. It sets the guide rulers 4 so that they touch the strip-shaped rolling stock 8. In this case, therefore, the alignment of the rolling stock 8 takes place through the guide rails 4.
  • an orientation of the initial edge 14 relative to the roll gap g is thus achieved at least almost parallel even if this orientation is not achievable by means of the guide rulers 4.
  • the procedure according to the invention that is, the matching of the peripheral speed vU and the entry speed vE in such a way that due to this coordination any skew of the leading edge 14 is at least reduced relative to the nip g, acts particularly well in those cases where the conventional orientation means the guide Rulle 4 fails. Because it works particularly well for short, wide rolled goods 8. It therefore represents an almost ideal supplement to the conventional approach.

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  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
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Description

Die vorliegende Erfindung betrifft ein Betriebsverfahren für ein Walzwerk zum Walzen eines bandförmigen Walzguts, das eine Anfangskante mit zwei Enden.aufweist. Das Walzwerk weist ein Walzgerüst mit Arbeitswalzen, einen eingangsseitig des Walzgerüsts angeordneten Rollgang und eine Steuereinrichtung auf. Die Arbeitswalzen bilden einen Walzspalt. Die Steuereinrichtung steuert das Walzgerüst derart an, dass die Arbeitswalzen des Walzgerüsts sich mit einer Umfangsgeschwindigkeit drehen. Die Steuereinrichtung steuert weiterhin den eingangsseitig des Walzgerüsts angeordneten Rollgang derart an, dass die Anfangskante des bandförmigen Walzguts den Walzspalt mit einer Einlaufgeschwindigkeit erreicht.The present invention relates to an operation method for a rolling mill for rolling a strip-shaped rolling stock having an initial edge with two ends. The rolling mill has a roll stand with work rolls, an input side of the roll stand arranged roller table and a control device. The work rolls form a nip. The controller controls the rolling stand so that the work rolls of the rolling stand rotate at a peripheral speed. The control device further controls the input side of the rolling stand arranged roller table such that the initial edge of the strip-shaped rolling stock reaches the nip with an inlet speed.

Die vorliegende Erfindung betrifft weiterhin einen Datenträger mit einem auf dem Datenträger gespeicherten Computerprogramm zur Durchführung eines derartigen Betriebsverfahrens, wenn das Computerprogramm von einer Steuereinrichtung für ein Walzwerk ausgeführt wird. Auch betrifft die vorliegende Erfindung eine Steuereinrichtung für ein Walzwerk, die derart ausgebildet ist, insbesondere programmiert ist, dass das Walzwerk von ihr gemäß einem solchen Betriebsverfahren ansteuerbar ist.The present invention further relates to a data carrier having a computer program stored on the data carrier for carrying out such an operating method when the computer program is executed by a control device for a rolling mill. Also, the present invention relates to a control device for a rolling mill, which is designed, in particular programmed, that the rolling mill can be controlled by it according to such an operating method.

Auch betrifft die vorliegende Erfindung ein Walzwerk zum Walzen eines bandförmigen Walzguts, das ein Walzgerüst mit Arbeitswalzen, einen eingangsseitig des Walzgerüsts angeordneten Rollgang und eine Steuereinrichtung aufweist, wobei die Arbeitswalzen einen Walzspalt bilden und das Walzgerüst und der eingangsseitig des Walzgerüsts angeordnete Rollgang von der Steuereinrichtung derart ansteuerbar sind, dass die Arbeitswalzen des Walzgerüsts sich mit einer Umfangsgeschwindigkeit drehen und eine Anfangskante des bandförmigen Walzguts den Walzspalt mit einer Einlaufgeschwindigkeit erreicht. Schließlich betrifft die vorliegende Erfindung noch ein bandförmiges Walzgut, das eine Anfangskante mit zwei Enden aufweist und gemäß einem obenstehend beschriebenen Betriebsverfahren gewalzt wurde.Also, the present invention relates to a rolling mill for rolling a strip-shaped rolling stock having a rolling stand with work rolls, a roller arranged on the roll side roller table and a control device, wherein the work rolls form a roll gap and the rolling mill and arranged on the input side of the roll stand of the control device such are controllable, that the work rolls of the rolling stand rotate at a peripheral speed and reaches an initial edge of the strip-shaped rolling stock, the roll gap with an inlet speed. Finally, the present invention also relates to a strip-shaped rolling stock having an initial edge with two ends and rolled according to an operating method described above.

Beim Walzen von bandförmigem Walzgut wird das Walzgut dem Walzgerüst in der Regel mit einer Einlaufgeschwindigkeit zugeführt, welche kleiner als die Umfangsgeschwindigkeit der Arbeitswalzen des Walzgerüsts ist. Mit dem Einlaufen der Anfangskante des Walzguts in den Walzspalt wird der Walzspalt geschlossen und das Walzgut gewalzt.When rolling strip-shaped rolling stock, the rolling stock is fed to the roll stand usually with an entry speed which is smaller than the peripheral speed of the work rolls of the roll stand. With the arrival of the leading edge of the rolling stock in the nip of the roll gap is closed and rolled the rolled stock.

Obenstehende Betriebsweise stellt den theoretischen Idealfall dar, in dem die Anfangskante parallel zum Walzspalt ausgerichtet ist und so auch in den Walzspalt einläuft. In der Praxis kann es aber geschehen, dass die beiden Enden der Anfangskante nacheinander in den Walzspalt einlaufen, die Anfangskante also eine Schieflage relativ zum Walzspalt aufweist. In diesem Fall kommt es zu einem sogenannten Diagonalenverzug, der einerseits zu einer Überbreite des Walzguts führt, andererseits dem Walzgut die Form eines Parallelogramms aufprägt. Beide Effekte verringern das sogenannte Ausbringen, das heißt den Anteil an nutzbarem Walzgutvolumen.The above operating mode represents the theoretical ideal case in which the initial edge is aligned parallel to the nip and thus enters the nip. In practice, however, it may happen that the two ends of the leading edge run into the nip one after the other, that is to say the initial edge has a skewed position relative to the nip. In this case, there is a so-called diagonal delay, on the one hand leads to an excess width of the rolling stock, on the other hand imprints the rolling stock in the form of a parallelogram. Both effects reduce the so-called spreading, that is the proportion of usable Walzgutvolumen.

Zur Vermeidung der Schieflage werden im Stand der Technik sogenannte Führungslineale eingesetzt. Die Führungslineale werden seitlich an das bandförmige Walzgut angestellt. Sie richten das bandförmige Walzgut derart aus, dass die Anfangskante parallel zum Walzspalt orientiert ist. Rein beispielhaft wird auf die DE 31 16 278 A1 , die EP 0 925 854 A2 und die EP 0 166 981 A1 verwiesen.To avoid the skew so-called guide rulers are used in the prior art. The guide rulers are made laterally to the strip-shaped rolling stock. They align the strip-shaped rolling stock in such a way that the starting edge is oriented parallel to the nip. Purely by way of example is on the DE 31 16 278 A1 , the EP 0 925 854 A2 and the EP 0 166 981 A1 directed.

Das Ausrichten des Walzguts ist zeitaufwändig und beeinflusst die Produktivität des Walzwerks negativ. Ferner ist die Ausrichtung insbesondere dann nur schlecht möglich, wenn das bandförmige Walzgut ein großes Breiten-Längen-Verhältnis aufweist. Darüber hinaus besteht auch bei ordnungsgemäßer Ausrichtung des Walzguts die Gefahr, dass das Walzgut sich zwischen dem Ausrichten durch die Führungslineale und dem Einlaufen in den Walzspalt erneut verdreht, so dass trotz der Führungslineale eine Schieflage der Anfangskante relativ zum Walzspalt auftritt. Die Gefahr des Verdrehens des Walzguts ist dabei umso größer, je größer das Verhältnis von Breite zu Länge des bandförmigen Walzguts ist und je kleiner das Verhältnis von Länge des bandförmigen Walzguts zu Abstand der Transportrollen des eingangsseitig des Walzgerüsts angeordneten Rollgangs ist.The alignment of the rolling stock is time-consuming and adversely affects the productivity of the rolling mill. Furthermore, the alignment is particularly poorly possible if the strip-shaped rolling has a large width-length ratio. In addition, there is a risk that the rolling stock between even with proper alignment of the rolling stock the alignment by the guide rulers and the shrinkage in the nip again rotated, so that in spite of the guide rulers an imbalance of the leading edge relative to the nip occurs. The risk of twisting of the rolling stock is greater, the greater the ratio of width to length of the strip-shaped rolling stock and the smaller the ratio of length of the strip-shaped rolling stock to distance of the transport rollers of the input side of the rolling mill arranged roller table.

Die Aufgabe der vorliegenden Erfindung besteht darin, ein Betriebsverfahren für ein Walzwerk zum Walzen von bandförmigem Walzgut derart zu verbessern, dass die Produktivität und das Ausbringen erhöht werden.The object of the present invention is to improve an operation method for a rolling mill for rolling strip-shaped rolling stock so as to increase productivity and yield.

Die Aufgabe wird, ausgehend von einem Betriebsverfahren der eingangs genannten Art, dadurch gelöst, dass die Einlaufgeschwindigkeit größer als die Umfangsgeschwindigkeit ist und die Steuereinrichtung die Umfangsgeschwindigkeit und die Einlaufgeschwindigkeit derart aufeinander abstimmt, dass auf Grund der Abstimmung der Umfangsgeschwindigkeit und der Einlaufgeschwindigkeit aufeinander eine etwaige Schieflage der Anfangskante relativ zum Walzspalt zumindest reduziert wird.The object is, starting from an operating method of the type mentioned, achieved in that the inlet speed is greater than the peripheral speed and the control device, the peripheral speed and the inlet velocity such a tuned that due to the vote of the peripheral speed and the inlet velocity successive any imbalance the starting edge is at least reduced relative to the nip.

Hiermit korrespondierend wird die Aufgabe auch dadurch gelöst, dass auf dem Datenträger ein entsprechendes Computerprogramm gespeichert ist bzw. dass die Steuereinrichtung für das Walzwerk entsprechend ausgebildet ist, insbesondere programmiert ist.Correspondingly, this object is also achieved in that a corresponding computer program is stored on the data carrier or that the control device for the rolling mill is designed accordingly, in particular programmed.

Für das Walzwerk wird die Aufgabe dadurch gelöst, dass die Einlaufgeschwindigkeit größer als die Umfangsgeschwindigkeit ist und die Umfangsgeschwindigkeit und die Einlaufgeschwindigkeit von der Steuereinrichtung derart aufeinander abstimmbar sind, dass auf Grund der Abstimmung der Umfangsgeschwindigkeit und der Einlaufgeschwindigkeit aufeinander eine etwaige Schieflage der Anfangskante relativ zum Walzspalt zumindest reduziert wird.For the rolling mill, the object is achieved in that the inlet speed is greater than the peripheral speed and the peripheral speed and the inlet speed of the control device are tuned to one another such that due to the vote of the peripheral speed and the inlet speed to each other a possible skew of the leading edge relative to the nip at least reduced.

Es ist möglich, dass die Steuereinrichtung die Umfangsgeschwindigkeit und die Einlaufgeschwindigkeit derart aufeinander abstimmt, dass das bandförmige Walzgut sich in dem Fall, dass eines der Enden der Anfangskante vor dem anderen der Enden der Anfangskante den Walzspalt erreicht, um das den Walzspalt zuerst erreichende Ende dreht. Das den Walzspalt später erreichende Ende der Anfangskante rutscht also auf den Walzspalt zu. Diese Vorgehensweise ist im Regelfall vorzuziehen.It is possible for the control means to match the peripheral speed and the lead-in speed such that the strip-shaped rolling rotates around the end first reaching the roll gap in case one of the ends of the leading edge reaches the other end of the leading edge , The gap later reaching the end of the leading edge thus slips on the nip. This procedure is generally preferable.

In Einzelfällen kann es aber auch sinnvoll sein, wenn die Steuereinrichtung die Umfangsgeschwindigkeit und die Einlaufgeschwindigkeit derart aufeinander abstimmt, dass das bandförmige Walzgut in dem Fall, dass eines der Enden der Anfangskante vor dem anderen der Enden der Anfangskante den Walzspalt erreicht, mit dem den Walzspalt zuerst erreichenden Ende vom Walzspalt abprallt. In diesem Fall ist eine besonders genaue Abstimmung der Umfangsgeschwindigkeit und der Einlaufgeschwindigkeit aufeinander erforderlich, damit das bandförmige Walzgut nicht zu weit zurückprallt.In individual cases, it may also be useful if the control device the circumferential speed and the lead-in speed tuned to each other so that the strip-shaped rolling in the case that one of the ends of the leading edge before the other of the ends of the leading edge reaches the nip, with the nip first reaching end rebounds from the nip. In this case, a particularly accurate coordination of the peripheral speed and the inlet speed to each other is required so that the strip-shaped rolling material does not rebound too far.

Das erfindungsgemäße Betriebsverfahren kann insbesondere auch bei existierenden Walzwerken eingesetzt werden, also bei Walzwerken, welche die obenstehend erwähnten Führungslineale aufweisen. Diese Führungslineale sind in aller Regel an das Walzgut anstellbar. Im Rahmen der vorliegenden Erfindung steuert die Steuereinrichtung die Führungslineale vorzugsweise derart an, dass sie das bandförmige Walzgut nicht berühren.The operating method according to the invention can also be used in particular in existing rolling mills, that is to say in rolling mills which have the guiding rulers mentioned above. These guide rulers are usually adjustable to the rolling stock. In the context of the present invention, the control device preferably controls the guide rulers in such a way that they do not touch the strip-shaped rolling stock.

Vorzugsweise nimmt die Steuereinrichtung charakteristische Größen des bandförmigen Walzguts und des Walzwerks entgegen und berechnet anhand der charakteristischen Größen in einem Modell die Umfangsgeschwindigkeit und die Einlaufgeschwindigkeit. Als charakteristische Größen des Walzguts kommen insbesondere die Länge, die Breite, die Dicke und die Masse des Walzguts in Frage. Als charakteristische Größen des Walzwerks kommen insbesondere der Abstand einzelner Transportrollen des Rollgangs, der Walzspalt und der Durchmesser der Arbeitswalzen in Frage.The control device preferably accepts characteristic sizes of the strip-shaped rolling stock and of the rolling mill and calculates the circumferential speed and the entry speed on the basis of the characteristic variables in a model. As characteristic sizes of the rolling stock come in particular the length, the width, the thickness and the mass of the rolling stock in question. The characteristic variables of the rolling mill are in particular the distance of individual transport rollers of the roller table, the nip and the diameter of the work rolls in question.

Vorzugsweise prüft die Steuereinrichtung anhand der charakteristischen Größen, ob eine Ausführungsbedingung erfüllt ist. Nur wenn die Ausführungsbedingung erfüllt ist, stimmt die Steuereinrichtung die Umfangsgeschwindigkeit und die Einlaufgeschwindigkeit entsprechend dem obenstehend beschriebenen Verfahren aufeinander ab. Wenn hingegen die Ausführungsbedingung nicht erfüllt ist, stimmt die Steuereinrichtung die Umfangsgeschwindigkeit und die Einlaufgeschwindigkeit derart aufeinander ab, dass eine etwaige Schieflage der Anfangskante relativ zum Walzspalt nicht auf Grund der Abstimmung der Umfangsgeschwindigkeit und der Einlaufgeschwindigkeit aufeinander reduziert wird. Eine etwaige Schieflage der Anfangskante relativ zum Walzspalt wird also zwar möglicherweise reduziert, nicht aber auf Grund der Abstimmung der Umfangsgeschwindigkeit und der Einlaufgeschwindigkeit aufeinander. Diese Abstimmung hat in diesem Fall keinen Einflüss auf das Reduzieren der Schieflage.The control device preferably checks on the basis of the characteristic variables whether an execution condition is met. Only when the execution condition is satisfied, the controller adjusts the peripheral speed and the lead-in speed to each other in accordance with the method described above. On the other hand, if the execution condition is not satisfied, the controller adjusts the peripheral speed and the lead-in speed to each other so that any skew of the leading edge relative to the roll gap is not reduced due to the matching of the peripheral speed and the lead-in speed. A possible skew of the leading edge relative to the nip is thus possibly reduced, but not due to the vote of the peripheral speed and the inlet speed each other. This vote in this case has no influence on reducing the imbalance.

In die Ausführungsbedingung können verschiedene Größen eingehen. Vorzugsweise gehen in die Ausführungsbedingung eine Länge des bandförmigen Walzguts, eine Breite des bandförmigen Walzguts, ein Verhältnis von Länge und Breite des bandförmigen Walzguts und/oder eine Masse des bandförmigen Walzguts ein.The execution condition can take various sizes. Preferably in the execution condition, a length of the strip-shaped rolling stock, a width of the strip-shaped rolling stock, a ratio of length and width of the strip-shaped rolling stock and / or a mass of the strip-shaped rolling stock.

Wie bereits erwähnt, kann der eingangsseitig des Walzgerüsts angeordnete Rollgang Führungslineale aufweisen, die seitlich an das bandförmige Walzgut anstellbar sind. Wenn die Ausführungsbedingung nicht erfüllt ist, stellt die Steuereinrichtung vorzugsweise die Führungslineale derart ein, dass sie das bandförmige Walzgut berühren. Das bandförmige Walzgut wird in diesem Fall also entweder gemäß dem erfindungsgemäßen Verfahren oder aber gemäß dem konventionellen Verfahren (d. h. durch die Führungslineale) ausgerichtet.As already mentioned, the roller table arranged on the input side roller table can have guide rulers, which can be adjusted laterally against the strip-shaped rolling stock. If the execution condition is not met, the control device preferably adjusts the guide rulers so that they touch the strip-shaped rolling stock. The strip-shaped rolling stock is thus in this case either according to the invention Method or according to the conventional method (ie, by the guide rulers) aligned.

Weitere Vorteile und Einzelheiten ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen in Verbindung mit den Zeichnungen. Es zeigen in Prinzipdarstellung:

FIG 1
schematisch ein Walzwerk von der Seite,
FIG 2
das Walzwerk von FIG 1 von oben,
FIG 3
ein Ablaufdiagramm,
FIG 4
eine erste Möglichkeit zum Reduzieren einer Schieflage der Anfangskante relativ zum Walzspalt und
FIG 5
eine zweite Möglichkeit zum Reduzieren einer Schieflage der Anfangskante relativ zum Walzspalt.
Further advantages and details will become apparent from the following description of exemplary embodiments in conjunction with the drawings. In a schematic representation:
FIG. 1
schematically a rolling mill from the side,
FIG. 2
the rolling mill of FIG. 1 from above,
FIG. 3
a flow chart,
FIG. 4
a first possibility for reducing a skew of the leading edge relative to the nip and
FIG. 5
a second possibility for reducing a skew of the leading edge relative to the nip.

Gemäß den FIG 1 und 2 weist ein Walzwerk ein Walzgerüst 1, zwei Rollgänge 2, 3, Führungslineale 4 und eine Steuereinrichtung 5 auf. Das Walzgerüst 1 weist mindestens zwei Arbeitswalzen 6 auf, in der Regel auch weitere Walzen 7, beispielsweise zwei Stützwalzen 7.According to the FIG. 1 and 2 For example, a rolling mill has a rolling stand 1, two roller tables 2, 3, guide rails 4 and a control device 5. The roll stand 1 has at least two work rolls 6, as a rule also further rolls 7, for example two support rolls 7.

Das Walzwerk dient dem Walzen eines bandförmigen Walzguts 8. Je einer der beiden Rollgänge 2, 3 ist eingangsseitig und ausgangsseitig des Walzgerüsts 1 angeordnet. Die Rollgänge 2, 3 weisen jeweils eine Anzahl von Transportrollen 9 auf, die um einen Abstand a voneinander beabstandet sind. Die Führungslineale 4 sind am eingangsseitigen Rollgang 2 angeordnet. Sie sind seitlich an das Walzgut 8 anstellbar. Die Steuereinrichtung 5 dient der Steuerung und Koordinierung des Walzgerüsts 1, der Führungslineale 4 und der Transportrollen 9 der Rollgänge 2, 3.The rolling mill is used for rolling a strip-shaped rolling stock 8. Depending on one of the two roller tables 2, 3 is arranged on the input side and output side of the roll stand 1. The roller tables 2, 3 each have a number of transport rollers 9, which are spaced apart by a distance a. The guide rulers 4 are arranged on the input side roller table 2. You can be adjusted laterally to the rolling stock 8. The control device 5 serves to control and coordinate the roll stand 1, the guide rails 4 and the transport rollers 9 of the roller tables 2, 3.

Der Steuereinrichtung 5 wird über einen Datenträger 10, auf dem ein Computerprogramm 11 gespeichert ist, dieses Computerprogramm 11 zugeführt. Die Steuereinrichtung 5 übernimmt das Computerprogramm 11 und legt es in einem internen Speicher 12 ab. Dadurch wird die Steuereinrichtung 5 derart programmiert (bzw. allgemeiner ausgebildet), dass sie bei Aufruf des Computerprogramms 11 das Walzwerk gemäß einem Betriebsverfahren betreibt, das nachstehend in Verbindung mit FIG 3 näher erläutert wird.The control device 5 is supplied via a data carrier 10, on which a computer program 11 is stored, this computer program 11. The control device 5 takes over the computer program 11 and stores it in an internal memory 12. As a result, the control device 5 is programmed (or formed more generally) in such a way that when the computer program is called up 11 operates the rolling mill according to an operating method, which is described below in connection with FIG. 3 is explained in more detail.

Gemäß FIG 3 nimmt die Steuereinrichtung 5 in einem Schritt S1 zunächst charakteristische Größen des Walzguts 8 entgegen. Die charakteristischen Größen des Walzguts 8 umfassen insbesondere dessen Länge 1, dessen Breite b, dessen Dicke d, dessen Masse m, dessen Temperatur T und dessen stoffliche Zusammensetzung Z. Gegebenenfalls können der Steuereinrichtung 5 im Rahmen des Schrittes S1 auch weitere Größen des Walzguts 8 zugeführt werden.According to FIG. 3 takes the control device 5 in a step S1 initially characteristic sizes of the rolling stock 8 against. The characteristic sizes of the rolling stock 8 include in particular its length 1, its width b, its thickness d, its mass m, its temperature T and its material composition Z. Optionally, the control device 5 in the context of step S1 also other sizes of the rolled material 8 fed become.

In einem Schritt S2 nimmt die Steuereinrichtung 5 ferner charakteristische Größen des Walzwerks entgegen. Die charakteristischen Größen des Walzwerks umfassen insbesondere den Durchmesser der Arbeitswalzen 6 und den Abstand a der Transportrollen 9 voneinander.In a step S2, the control device 5 also receives characteristic variables of the rolling mill. The characteristic sizes of the rolling mill include in particular the diameter of the work rolls 6 and the distance a of the transport rollers 9 from each other.

Schließlich nimmt die Steuereinrichtung 5 in einem Schritt S3 charakteristische Größen des gewünschten Walzvorgangs entgegen. Die charakteristischen Größen des gewünschten Walzvorgangs umfassen insbesondere eine Stichabnahme δ und eine gewünschte Walzgeschwindigkeit vW. Die Stichabnahme δ kann alternativ als absolute oder als relative Stichabnahme vorgegeben sein.Finally, in a step S3, the control device 5 receives characteristic variables of the desired rolling operation. The characteristic variables of the desired rolling operation include, in particular, a reduction in the stitching δ and a desired rolling speed vW. The reduction in value δ can alternatively be specified as an absolute or as a relative reduction in the number of passes.

Anhand der charakteristischen Größen δ, vW des gewünschten Walzvorgangs ermittelt die Steuereinrichtung 5 in einem Schritt S4 mittels eines Modells 13 in an sich bekannter Weise Gerüsteinstellungen für das Walzgerüst 1. Die Gerüsteinstellungen umfassen insbesondere einen Walzspalt, g und eine Umfangsgeschwindigkeit vU der Arbeitswalze 6 des Walzgerüsts 1. Der Walzspalt g ist eine Funktion der Breite b, der Dicke d, der Temperatur T, der stofflichen Zusammensetzung Z, der gewünschten Stichabnahme δ, der Gerüststeifigkeit und gegebenenfalls weiterer Variablen. Die Umfangsgeschwindigkeit vU der Arbeitswalzen 6 ist insbesondere eine Funktion der Dicke d, der Stichabnahme δ, der Walzgeschwindigkeit vW, des Walzspalts g und gegebenenfalls weiterer Größen.On the basis of the characteristic variables δ, vW of the desired rolling operation, the control device 5 determines in a step S4 by means of a model 13 in a conventional manner stand settings for the rolling stand 1. The framework settings include in particular a roll gap, g and a peripheral speed vU of the work roll 6 of the rolling stand 1. The roll gap g is a function of the width b, the thickness d, the temperature T, the material composition Z, the desired reduction in the number of stitches δ, the framework stiffness and optionally other variables. The peripheral speed vU of the work rolls 6 is in particular a function of the thickness d, the reduction δ, the rolling speed vW, the nip g and optionally other sizes.

In Schritten S5 bis S8 prüft die Steuereinrichtung 5, ob verschiedene Bedingungen erfüllt sind. Die Schritte S5 bis S8 müssen nicht alle vorhanden sein. Insbesondere der Schritt S8 könnte gegebenenfalls entfallen. Mindestens einer der Schritte S5 bis S7 muss aber vorhanden sein. Der wichtigste Schritt dürfte vermutlich der Schritt S5 sein.In steps S5 to S8, the controller 5 checks if various conditions are satisfied. Steps S5 to S8 do not all have to exist. In particular, step S8 could possibly be omitted. However, at least one of the steps S5 to S7 must be present. The most important step should probably be step S5.

Im Schritt S5 prüft die Steuereinrichtung 5 zunächst, ob die Länge 1 des Walzguts 8 unterhalb einer Grenzlänge L liegt. Die Grenzlänge L beträgt vorzugsweise ein Mehrfaches des Abstands a der Transportrollen 9 voneinander, beispielsweise das fünf- bis zehnfache. Im Schritt S6 prüft die Steuereinrichtung 5, ob die Breite b des Walzguts 8 eine Grenzbreite B übersteigt. Die Grenzbreite B beträgt vorzugsweise ebenfalls ein Mehrfaches des Abstands a der Transportrollen 9 voneinander. Im Schritt S7 prüft die Steuereinrichtung 5, ob das Verhältnis von Breite b zu Länge 1 des Walzguts 8 oberhalb einer Schwelle S liegt. Die Schwelle S weist in aller Regel einen Wert auf, der größer als zwei ist. In der Regel ist er sogar größer als drei. Im Schritt S8 prüft die Steuereinrichtung 5, ob die Masse m des Walzguts 8 unterhalb einer Grenzmasse M liegt.In step S5, the control device 5 first checks whether the length l of the rolling stock 8 is below a limit length L. The limit length L is preferably a multiple of the distance a of the transport rollers 9 from each other, for example, five to ten times. In step S6, the control device 5 checks whether the width b of the rolling stock 8 exceeds a limit width B. The border width B is preferably also a multiple of the distance a of the transport rollers 9 from each other. In step S7, the control device 5 checks whether the ratio of width b to length 1 of the rolling stock 8 is above a threshold S. The threshold S usually has a value that is greater than two. In general, he is even larger than three. In step S8, the control device 5 checks whether the mass m of the rolling stock 8 is below a limit mass M.

Die Prüfungen der Schritte S5 bis S8 können prinzipiell in beliebiger Weise miteinander verknüpft sein, beispielsweise mittels einer logischen ODER-Verknüpfung. Gemäß FIG 3 sind sie UND-verknüpft.The checks of steps S5 to S8 can in principle be linked together in any desired manner, for example by means of a logical OR operation. According to FIG. 3 they are AND-linked.

Wenn gemäß FIG 3 alle Prüfungen der Schritte S5 bis S8 zu einem positiven Ergebnis geführt haben, führt die Steuereinrichtung 5 Schritte S9 bis S12 aus.If according to FIG. 3 If all checks of steps S5 to S8 have led to a positive result, the control device 5 carries out steps S9 to S12.

Im Schritt S9 ermittelt die Steuereinrichtung 5 in dem Modell 13 eine Einlaufgeschwindigkeit vE. Die Einlaufgeschwindigkeit vE ist die Geschwindigkeit, mit der eine Anfangskante 14 des Walzguts 8 den Walzspalt g erreicht. Sie ist, wenn sie im Schritt S9 bestimmt wird, größer als die Umfangsgeschwindigkeit vU der Arbeitswalzen 6 des Walzgerüsts 1.In step S9, the control device 5 in the model 13 determines an intake speed vE. The entry speed vE is the speed at which an initial edge 14 of the Walzguts 8 reaches the nip g. It is greater than the peripheral speed vU of the work rolls 6 of the rolling stand 1 when determined in step S9.

Im Schritt S10 stellt die Steuereinrichtung 5 die Führungslineale 4 vom Walzgut 8 ab. Sie stellt die Führungslineale 4 also derart ein, dass sie das Walzgut 8 nicht berühren. Im Schritt S11 steuert die Steuereinrichtung 5 das Walzgerüst 1 derart an, dass die im Schritt S4 bestimmten Gerüsteinstellungen eingestellt werden. Insbesondere steuert die Steuereinrichtung 5 das Walzgerüst 1 also derart an, dass die Arbeitswalzen 6 den Walzspalt g bilden und dass die Arbeitswalzen 6 sich mit der Umfangsgeschwindigkeit vU drehen.In step S10, the control device 5, the guide rulers 4 from the rolling stock 8 from. It sets the guide ruler 4 so that they do not touch the rolling stock 8. In step S11, the control device 5 controls the rolling stand 1 in such a way that the framework settings determined in step S4 are set. In particular, the control device 5 controls the roll stand 1 in such a way that the work rolls 6 form the roll gap g and that the work rolls 6 rotate with the peripheral speed vU.

Im Schritt S12 steuert die Steuereinrichtung 5 den eingangsseitig angeordneten Rollgang 2 derart an, dass die Anfangskante 14 des Walzguts 8 mit der Einlaufgeschwindigkeit vE in den Walzspalt g einläuft.In step S12, the control device 5 controls the roller table 2 arranged on the input side in such a way that the starting edge 14 of the rolling stock 8 enters the roll gap g at the entry speed vE.

Gemäß FIG 2 weist die Anfangskante 14 des Walzguts 8 zwei Enden 15, 16 auf. Im Idealfall ist die Anfangskante 14 parallel zum Walzspalt g ausgerichtet und läuft auch so in den Walzspalt g ein. In diesem Fall erreichen beide Enden 15, 16 den Walzspalt g gleichzeitig. In der Praxis -siehe die FIG 4 und 5 - erreicht aber in der Regel eines der Enden 15, 16 der Anfangskante 14, hier das Ende 15, vor dem anderen der Enden 15, 16 der Anfangskante 14, hier dem Ende 16, den Walzspalt g. Die Anfangskante 14 weist daher eine Schieflage relativ zum Walzspalt g auf. Aus diesem Grund ermittelt die Steuereinrichtung 5 die Einlaufgeschwindigkeit vE im Rahmen des Schrittes S9 derart, dass auf Grund der Abstimmung der Umfangsgeschwindigkeit vU und der Einlaufgeschwindigkeit vE aufeinander eine derartige Schieflage der Anfangskante 14 relativ zum Walzspalt g zumindest reduziert wird. Die Einlaufgeschwindigkeit vE ist eine Funktion, die von der Länge 1, der Breite b, der Dicke d und der Masse m des Walzguts 8, der Umfangsgeschwindigkeit vU, dem Abstand a und gegebenenfalls auch von weiteren Größen abhängen kann. Die funktionale Beziehung der Einlaufgeschwindigkeit vE kann auf Grund theoretischer Überlegungen und/oder experimentell ermittelt werden.According to FIG. 2 For example, the leading edge 14 of the rolled stock 8 has two ends 15, 16. Ideally, the leading edge 14 is aligned parallel to the nip gap g and so enters the nip g. In this case, both ends 15, 16 reach the roll gap g at the same time. In practice - see the FIG. 4 and 5 - But usually reaches one of the ends 15, 16 of the leading edge 14, here the end 15, before the other of the ends 15, 16 of the leading edge 14, here the end 16, the roll gap g. The starting edge 14 therefore has a skew relative to the nip g. For this reason, the control device 5 determines the entry speed vE in the context of step S9 such that, due to the coordination of the peripheral speed vU and the entry speed vE, such a skew of the starting edge 14 relative to the nip g is at least reduced. The entry speed vE is a function that can depend on the length 1, the width b, the thickness d and the mass m of the rolling stock 8, the peripheral speed vU, the distance a and possibly also of other sizes. The functional relationship the inlet velocity vE can be determined on the basis of theoretical considerations and / or experimentally.

Die Einlaufgeschwindigkeit vE wird von der Steuereinrichtung 5 in der Regel derart bestimmt, dass die Arbeitswalzen 6 das den Walzspalt g zuerst erreichende Ende 15 zwar halten, auf Grund der Massenträgheit des Walzguts 8 das Walzgut 8 aber auf den Transportrollen 9 auf die Arbeitswalzen 6 zu rutscht. Die Steuereinrichtung 5 stimmt die Umfangsgeschwindigkeit vU und die Einlaufgeschwindigkeit vE also derart aufeinander ab, dass das bandförmige Walzgut 8 sich in diesem Fall um das den Walzspalt g zuerst erreichende Ende 15 dreht. Diese Vorgehensweise ist in FIG 4 schematisch durch einen Pfeil 17 angedeutet.The lead-in speed vE is usually determined by the control device 5 in such a way that the work rolls 6 hold the end 15 which first reaches the roll gap g, but due to the inertia of the rolled stock 8, the rolled stock 8 slips onto the work rolls 6 on the transport rolls 9 , The control device 5 adjusts the peripheral speed vU and the entry speed vE to one another in such a way that the strip-shaped rolling stock 8 in this case rotates about the end 15 which first reaches the roll gap g. This procedure is in FIG. 4 schematically indicated by an arrow 17.

Es ist aber auch möglich, dass die Abstimmung der Umfangsgeschwindigkeit vU und der Einlaufgeschwindigkeit vE aufeinander von der Steuereinrichtung 5 derart vorgenommen wird, dass das bandförmige Walzgut 8 in dem Fall, dass eines der Enden 15, 16 der Anfangskante 14 (hier das Ende 15) vor dem anderen der Enden 15, 16 der Anfangskante 14 (hier dem Ende 16) den Walzspalt g erreicht, mit dem den Walzspalt g zuerst erreichenden Ende 15 vom Walzspalt g abprallt. Dies ist in FIG 5 schematisch durch Pfeile 18, 19 angedeutet, wobei der Pfeil 18 größer als der Pfeil 19 ist.But it is also possible that the vote of the peripheral speed vU and the lead-in speed vE on each other by the control device 5 is made such that the strip-shaped rolling 8 in the case that one of the ends 15, 16 of the leading edge 14 (here the end 15) before the other of the ends 15, 16 of the leading edge 14 (here the end 16) reaches the nip g, with the nip g first reaching the end 15 rebounds from the nip g. This is in FIG. 5 schematically indicated by arrows 18, 19, wherein the arrow 18 is greater than the arrow 19.

Wenn - gemäß FIG 3 - eine der Prüfungen der Schritte S5 bis S8 nicht erfüllt ist, führt die Steuereinrichtung 5 anstelle der Schritte S9 und S10 Schritte S13 und S14 aus.If - according to FIG. 3 - one of the checks of steps S5 to S8 is not satisfied, the controller 5 executes steps S13 and S14 instead of steps S9 and S10.

Im Schritt S13 ermittelt die Steuereinrichtung 5 - analog zum Schritt S9 - die Einlaufgeschwindigkeit vE. Sie ermittelt die Einlaufgeschwindigkeit vE im Rahmen des Schrittes S13 aber derart, dass eine etwaige Schieflage der Anfangskante 14 relativ zum Walzspalt g nicht auf Grund der Abstimmung von Umfangsgeschwindigkeit vU und Einlaufgeschwindigkeit vE aufeinander reduziert wird. Die Einlaufgeschwindigkeit vE kann also insbesondere kleiner als die Umfangsgeschwindigkeit vU sein. Sie kann aber weiterhin eine Funktion der Länge 1, der Breite b, der Masse m, der Dicke d, der Umfangsgeschwindigkeit vU und eventuell weiterer Größen wie beispielsweise des Abstands a der Transportrollen 9 voneinander sein.In step S13, the control device 5 - analogous to step S9 - determines the inlet velocity vE. However, it determines the entry speed vE in the context of step S13, but in such a way that any skew of the starting edge 14 relative to the nip gap g is not reduced to one another due to the coordination of the peripheral speed vU and the entry speed vE. The inlet velocity vE can therefore be smaller than the circumferential velocity vU, in particular. However, it can still be a function of the length 1, the width b, the mass m, the thickness d, the peripheral speed vU and possibly other variables such as the distance a of the transport rollers 9 from each other.

Im Schritt S14 stellt die Steuereinrichtung 5 die Führungslineale 4 an das Walzgut 8 an. Sie stellt die Führungslineale 4 also derart ein, dass sie das bandförmige Walzgut 8 berühren. In diesem Fall erfolgt also das Ausrichten des Walzguts 8 durch die Führungslineale 4.In step S14, the control device 5 adjusts the guide rulers 4 to the rolling stock 8. It sets the guide rulers 4 so that they touch the strip-shaped rolling stock 8. In this case, therefore, the alignment of the rolling stock 8 takes place through the guide rails 4.

Mittels des erfindungsgemäßen Betriebsverfahrens wird somit auch dann eine zumindest nahezu parallele Ausrichtung der Anfangskante 14 relativ zum Walzspalt g erreicht, wenn diese Ausrichtung mittels der Führungslineale 4 nicht erreichbar ist. Die erfindungsgemäße Vorgehensweise, also das Abstimmen der Umfangsgeschwindigkeit vU und der Einlaufgeschwindigkeit vE derart aufeinander, dass auf Grund dieser Abstimmung eine etwaige Schieflage der Anfangskante 14 relativ zum Walzspalt g zumindest reduziert wird, wirkt genau in den Fällen besonders gut, in denen die konventionelle Ausrichtung mittels der Führungslineale 4 versagt. Denn sie wirkt besonders gut bei kurzen, breiten Walzgütern 8. Sie stellt daher eine nahezu ideale Ergänzung der konventionellen Vorgehensweise dar.By means of the operating method according to the invention an orientation of the initial edge 14 relative to the roll gap g is thus achieved at least almost parallel even if this orientation is not achievable by means of the guide rulers 4. The procedure according to the invention, that is, the matching of the peripheral speed vU and the entry speed vE in such a way that due to this coordination any skew of the leading edge 14 is at least reduced relative to the nip g, acts particularly well in those cases where the conventional orientation means the guide Rulle 4 fails. Because it works particularly well for short, wide rolled goods 8. It therefore represents an almost ideal supplement to the conventional approach.

Claims (11)

  1. Method of operating a rolling mill for milling a strip-shaped rolling stock (8),
    - with the strip-shaped rolling stock (8) having a leading edge (14) with two ends (15, 16)
    - with the rolling mill having a roll stand (1) with working rolls (6), a roll train (2) arranged on the feed side of the roll stand (1) and a control device (5),
    - with the working rolls (6) forming a rolling gap (g).
    - with the control device (5) controlling the roll stand (1) such that the working rolls (6) of the roll stand turn at a peripheral speed (vU), characterised in that
    - the control device (5) controls the roll train (2) arranged on the feed side of the roll stand (1) such that the leading edge (14) of the strip-shaped rolling stock (8) reaches the rolling gap (g) at a feeding speed (vE) that is greater than the peripheral speed (vU) and synchronises the peripheral speed (vU) and the feeding speed (vE) such that, because of the synchronisation of the peripheral speed (Vu) and the feeding speed (vE), any angled position of the leading edge (14) relative to the rolling gap (g) is at least reduced.
  2. Method of operation according to claim 1,
    characterised in that the control device (5) synchronises the peripheral speed (vU) and the feeding speed (vE) such that the strip-shaped rolling stock (8), in the event of one of the ends (15, 16) of the leading edge (14) reaching the rolling gap (g) before the other of the ends (15, 16) of the leading edge (14), turns around the end (15) reaching the rolling gap (g) first.
  3. Method of operation according to claim 1,
    characterised in that the control device (5) synchronises the peripheral speed (vU) and the feeding speed (vE) such that the strip-shaped rolling stock (8), in the event of one of the ends (15, 16) of the leading edge (14) reaching the rolling gap (g) before the other of the ends (15, 16) of the leading edge (14), rebounds from the rolling gap (g) with the end first reaching the rolling gap.
  4. Method of operation according to claim 1, 2 or 3,
    characterised in that the roll train (2) located on the feeding side of the roll stand (1) features material guides (4) that are adjustable laterally to the strip-shaped rolling stock (8), and the control device (5) sets the material guides (4) such that they do not touch the strip-shaped rolling stock (8).
  5. Method of operation according to one of the preceding claims,
    characterised in that the control device (5) accepts characteristic variables (1, b, d, m, T, Z, a) of the strip-shaped rolling stock (8) and of the rolling mill, and that the control device (5) determines the peripheral speed (vU) and the feeding speed (vE) in a model (13), based on the characteristic variables (1, b, d, m, T, Z, a).
  6. Method of operation according to claim 5,
    characterised that
    - the control device (5) uses the characteristic variables (1, b, d, m, T, Z, a) to test whether an execution condition is fulfilled,
    - the control device (5) only synchronizes the peripheral speed (vU) and the feeding speed (vE) if an execution condition according to one of claims 1 to 4 is fulfilled, and
    - otherwise the control device (5) synchronizes the peripheral speed (vU) and the feeding speed (vE) such that any angled position of the leading edge (14) relative to the rolling gap (g) is not reduced because of the synchronization of the peripheral speed (vU) and the feeding speed (vE).
  7. Method of operation according to claim 6,
    characterised in that a length (1) of the strip-shaped rolling stock (8), a width (b) of the strip-shaped rolling stock (8), a ratio of length (1) and width (b) of the strip-shaped rolling stock (8) and/or a mass (m) of the strip-shaped rolling stock are included in the execution condition.
  8. Method of operation according to claim 5 or 6,
    characterised in that the roll train (2) located on the feeding side of the roll stand (1) features material guides (4) that are adjustable laterally to the strip-shaped rolling stock (8) and that, in the event of the execution condition not being fulfilled, the control device (5) sets the material guides (4) such that they touch the strip-shaped rolling stock (8).
  9. Data storage device with a computer program (11) stored on the data storage device for carrying out an operating method according to one of the above claims when the computer program (11) is executed by a control device (5) for a rolling mill.
  10. A control device for a rolling mill which is embodied, in particular programmed, such that the rolling mill is able to be controlled by it in accordance with one of claims 1 to 8.
  11. A rolling mill for milling a strip-shaped rolling stock (8),
    - with the rolling mill having a roll stand (1) with working rolls (6), a roll train (2) located at a feeding end of the roll stand (1) and a control device (5)
    - with the control device (5) able to be triggered by the roll stand (1) such that the working rolls (6) of the roll stand turn at a peripheral speed (vU),
    - with the roll train (2) located at a feeding end of the roll stand (1) able to be triggered by the control device (5) such that a leading edge (14) of the strip-shaped rolling stock (8) reaches the rolling gap (g) and a feeding speed (vE) that is greater than the peripheral speed (vU),
    - with the peripheral speed (vU) and the feeding speed (vE) able to be synchronised such that, because of the synchronisation of the peripheral speed (vU) and the feeding speed (vE), any angled position of the leading edge (14) relative to the rolling gap (g) is at least reduced.
EP07704306A 2006-03-15 2007-02-01 Method for the operation of a rolling mill used for milling a strip-shaped rolling stock Active EP1993748B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07704306T PL1993748T3 (en) 2006-03-15 2007-02-01 Method for the operation of a rolling mill used for milling a strip-shaped rolling stock

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006011975A DE102006011975A1 (en) 2006-03-15 2006-03-15 Operating method for a rolling mill for rolling a strip-shaped rolling stock
PCT/EP2007/050985 WO2007104604A1 (en) 2006-03-15 2007-02-01 Method for the operation of a rolling mill used for milling a strip-shaped rolling stock

Publications (2)

Publication Number Publication Date
EP1993748A1 EP1993748A1 (en) 2008-11-26
EP1993748B1 true EP1993748B1 (en) 2012-10-03

Family

ID=37944338

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07704306A Active EP1993748B1 (en) 2006-03-15 2007-02-01 Method for the operation of a rolling mill used for milling a strip-shaped rolling stock

Country Status (9)

Country Link
US (1) US8291736B2 (en)
EP (1) EP1993748B1 (en)
KR (1) KR20080098449A (en)
CN (1) CN101400456B (en)
DE (1) DE102006011975A1 (en)
PL (1) PL1993748T3 (en)
RU (1) RU2429092C2 (en)
UA (1) UA93076C2 (en)
WO (1) WO2007104604A1 (en)

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DE102007049062B3 (en) * 2007-10-12 2009-03-12 Siemens Ag Operating method for introducing a rolling stock into a rolling stand of a rolling mill, control device and rolling mill for rolling a strip-shaped rolling stock
DE102008030243A1 (en) * 2008-06-25 2009-12-31 Siemens Aktiengesellschaft Creation process for an optimized rolling model
DE102009014099A1 (en) * 2008-10-28 2010-04-29 Sms Siemag Aktiengesellschaft Device and method for lateral guidance of a rolled strip transported on a roller table
CN103203373B (en) * 2012-01-12 2015-07-22 宝山钢铁股份有限公司 Strip deviation correction control method for cold rolling pickling unit
DE102013200578A1 (en) * 2013-01-16 2014-07-17 Siemens Aktiengesellschaft Method for drive control
CN104438358B (en) * 2014-12-31 2016-11-16 太原磬泓机电设备有限公司 A kind of roller is away from online dynamic micro-adjustments device
CN105363795B (en) * 2015-11-17 2017-08-08 北京科技大学 Rolling line taper rollgang speed dynamic cooperation control system and its method
CN106399867B (en) * 2016-09-28 2019-01-04 浙江睿智钢业有限公司 The processing technology and its rolling unit of extra-strong corrosion resistant steel
CN111215460B (en) * 2019-11-12 2024-06-25 中冶京诚工程技术有限公司 Rolling mill area production facility and hot rolling production line of rotatory clamp in area
CN111215458B (en) * 2019-11-12 2024-06-25 中冶京诚工程技术有限公司 Rolling mill area production equipment with laser marking and positioning device and hot rolling production line
DE102021209261A1 (en) 2020-11-20 2022-05-25 Sms Group Gmbh Method for controlling a rolling stock guide in a rolling train and intermediate stand guide

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Also Published As

Publication number Publication date
KR20080098449A (en) 2008-11-07
CN101400456B (en) 2011-10-05
US20090235707A1 (en) 2009-09-24
UA93076C2 (en) 2011-01-10
US8291736B2 (en) 2012-10-23
CN101400456A (en) 2009-04-01
RU2008140735A (en) 2010-04-20
EP1993748A1 (en) 2008-11-26
DE102006011975A1 (en) 2007-09-27
PL1993748T3 (en) 2013-03-29
RU2429092C2 (en) 2011-09-20
WO2007104604A1 (en) 2007-09-20

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