EP2252416B1 - Regulation method for a cold-rolling train with complete mass flow regulation - Google Patents

Regulation method for a cold-rolling train with complete mass flow regulation Download PDF

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Publication number
EP2252416B1
EP2252416B1 EP09705015A EP09705015A EP2252416B1 EP 2252416 B1 EP2252416 B1 EP 2252416B1 EP 09705015 A EP09705015 A EP 09705015A EP 09705015 A EP09705015 A EP 09705015A EP 2252416 B1 EP2252416 B1 EP 2252416B1
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EP
European Patent Office
Prior art keywords
zeroth
cold
strip
thickness
passed
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EP09705015A
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German (de)
French (fr)
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EP2252416A1 (en
Inventor
Hans-Joachim Felkl
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Siemens AG
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Siemens AG
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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
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/165—Control of thickness, width, diameter or other transverse dimensions responsive mainly to the measured thickness of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/28—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/02—Transverse dimensions
    • B21B2261/04—Thickness, gauge
    • 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
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/46—Roll speed or drive motor control
    • 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
    • B21B37/48—Tension control; Compression control
    • B21B37/52—Tension control; Compression control by drive motor control
    • B21B37/54—Tension control; Compression control by drive motor control including coiler drive control, e.g. reversing mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product

Definitions

  • JP-A 2004268084 It is known to regulate the strip thickness at the exit of a tandem rolling mill by avoiding strong strip tension changes between the individual rolling stands.
  • the roller circumferential speed of the roll stand N upstream of the roll stand N-1 is adjusted by means of a coefficient. The coefficient is determined based on the deviation between the target value of the strip thickness and the tape exit thickness estimated by the mass flow law.
  • the present invention further relates to a computer program comprising machine code which is directly executable by a control device of a multi-stand rolling mill and whose execution by the control means causes the control means to control the cold rolling mill according to such a control method. Furthermore, the present invention relates to a data carrier with a stored on the disk such a computer program.
  • a device for strip thickness control in single-stand cold rolling mills wherein the device comprises a reel for the incoming in the rolling stand of the cold rolling mill strip part and a reel for the expiring from the rolling mill strip part. It is provided a device for controlling the speed of the uncoiler in the sense that the speed of the incoming band part is controlled in relation to the speed of the expiring band part according to the desired stitch reduction.
  • the corresponding mass flow principle is realized by these measures and the application of this principle for the regulation of multistage cold strip mills is basically known.
  • the strip thicknesses and the strip tensions are usually set according to the mass flow control concept, preferably in the extended variant, in which a belt-feed device arranged on the inlet side is considered to be the zero-stage rolling stand.
  • the desired belt thicknesses are quasi-automatically set.
  • the overfeed of the actual speeds of the cold strip in the individual sections relative to the roller speeds is an uncertainty factor.
  • the increasingly high demands on the dimensional stability of the rolled products therefore require new methods in order to be able to eliminate these uncertainties in the overfeed.
  • the object of the present invention is to provide possibilities by means of which the outgoing actual thicknesses of at least one of the rolling stands can be set correctly.
  • the possibility should in this case be combined with a correct setting of the inlet-side mass flow.
  • the computer program is designed such that it causes these measures.
  • the disk has a corresponding computer program.
  • the cold rolling mill according to the invention has such a control device, so that the control device in operation operates the cold rolling mill according to such a control method.
  • the mass flow controller also receives the basic output signal.
  • the zeroth forward regulator emits its output signal when the zeroth forward regulator is switched on. This latter measure results in a smoother, more stable connection of the zeroth forward controller.
  • control device has a first forward regulator, which receives the first actual thickness from the first thickness detection device.
  • first feedforward controller simulates the first setpoint speed and the zero setpoint speed.
  • the first forward regulator emits its output signal when the first forward regulator is switched on. This latter measure results in a smoother, more stable connection of the first forward regulator.
  • control method can also be implemented in the computer program and the control device.
  • control device can be implemented by circuitry. In general, however, the control device is designed as a programmable control device, which executes a computer program of the type described above during operation.
  • the tape feeding device may be formed as needed.
  • it can be designed as an S-roll set or as a uncoiler.
  • a cold rolling mill for rolling a cold strip 1 has a plurality of rolling stands 2.
  • the rolling stands 2 are passed through by the cold strip 1 in succession.
  • the cold rolling mill furthermore has a strip feeding device 3.
  • the strip feeding device 3 is arranged upstream of the rolling stand 2-1 which has passed through first.
  • the tape feeder 3 is according to FIG. 1 designed as an S-roll set.
  • the tape feeder 3 will be hereinafter referred to as "zeroth mill stand”. Corresponding elements and sizes that relate to the tape feeder 3, if necessary, provided with the suffix "-0".
  • the cold rolling mill further comprises a first thickness detecting device 4-1.
  • the first thickness detection device 4-1 is arranged downstream of the first continuous rolling mill 2-1, that is to say between the first pass through the rolling stand 2-1 and the next rolling mill 2-2.
  • a first actual thickness d-1 of the cold strip 1 is detected, that is to say the actual thickness d-1, with which the cold strip 1 runs out of the rolling mill 2-1 first passed through.
  • the control device 5 carries out a control method, which will be explained in detail below. Due to the operation of the control device 5, the cold rolling mill is thus operated according to such a control method.
  • the control device 5 of the strip feeding device 3 supplies a zeroth setpoint speed v-0 *.
  • the tape feeder 3 receives the zeroth set speed v-0 * and adjusts itself so that it feeds the cold strip 1 to the first passed through stand 2-1 with a zeroth actual speed v-0.
  • the zeroth actual speed v-0 corresponds in this case to the zeroth setpoint speed v-0 *.
  • the band feeding device 3 may have, for example, a zeroth speed controller 6-0 which correspondingly controls the zeroth actual speed v-0 of the band feed device 3.
  • the tape feeder 3 is, as already mentioned, logically considered zeroth mill stand. However, it does not roll the cold strip 1. An overfeed or the like therefore does not occur with respect to the tape feeder 3.
  • the peripheral speed of the tape feeder 3 therefore corresponds directly to the zeroth actual speed v-0. It only needs to be noted that the cold strip 1 does not slip.
  • control device 5 supplies the first rolling mill 2-1, which has passed through, to a first setpoint speed v-1 *.
  • the first run through stand 2-1 receives the first target speed v-1 * and turns this way in that rollers 7-1 of the first-pass rolling mill 2-1 rotate at a first actual speed v-1 corresponding to the first target speed v-1 *.
  • the first rolled mill 2-1 rolls the cold strip 1.
  • the cold strip 1 therefore exits from the first pass through stand 2-1 with an overfeed.
  • An actual speed v'-1 of the cold strip 1 behind the first passed through stand 2-1 is therefore greater than the first actual speed v-1. This will be discussed later in more detail.
  • the first actual thickness d-1 is detected.
  • the first thickness detection device 4-1 supplies the first actual thickness d-1 of the control device 5 detected by it.
  • the control device 5 receives the first actual thickness d-1.
  • the control device 5 has a thickness regulator 8 internally.
  • the thickness controller 8 may be designed, for example, as a P, PI, PID, or other controller.
  • the thickness regulator 8 is supplied with the first actual thickness d-1 and a first desired thickness d-1 *.
  • the thickness controller 8 determines a basic output signal ⁇ .
  • the control device 5 performs the first setpoint speed v-1 *, so that the first actual thickness d-1 of the cold strip 1 is adjusted to the first setpoint thickness d-1 * of the cold strip 1.
  • the basic output signal ⁇ serves only for tracking the first setpoint speed v-1 *.
  • the zeroth setpoint speed v-0 * is not tracked, at least not based on the basic output signal ⁇ .
  • the cold rolling mill further has a zeroth thickness detecting device 4-0.
  • the zeroth thickness detecting device 4-0 is disposed between the tape feeder 3 and the first passed through stand 2-1. It detects a zeroth actual thickness d-0 of the cold strip 1, that is to say the actual thickness d-0, with which the cold strip 1 enters the first rolling stand 2-1.
  • the zeroth thickness detector 4-0 supplies the zeroth actual thickness d-0 to a zeroth forward controller 9-0.
  • the zeroth forward regulator 9-0 is in this case part of the control device 5.
  • the zeroed forward regulator 9-0 accepts the zeroth actual thickness d-0. It performs the zero setpoint speed v-0 * in such a way that the product of zero setpoint speed v-0 * and zero actual thickness d-0 is set to a desired mass flow.
  • the zeroed forward regulator 9-0 preferably takes into account a distance that the zeroth thickness detection device 4-0 has from the rolling stand 2 - 1 passed through first, a dynamics of the belt feed device 3 and the time course of the zeroed actual speed v - 0. By these measures can - according to a tracking - be achieved that the tape feeder 3 time correct (namely, when the respective corresponding point of the cold strip 1, the first traversed mill stand reached 2-1) with the corresponding zero set speed v-0 * is applied.
  • control device 5 can also have a first forward regulator 9-1.
  • the first forward regulator 9-1 receives the first actual thickness d-1 from the first thickness detection device 4-1.
  • the first forward regulator 9-1 performs the first target speed v-1 * and the zero target speed v-0 * in a similar manner.
  • This embodiment does not contradict the regulation by the thickness controller 8, because the regulation by the first forward regulator 9-1 has a different (greater) dynamic than the regulation by the thickness regulator 8.
  • the mass flow controller 10 may optionally accept the basic output signal ⁇ from the thickness controller 8.
  • the zeroth actual thickness d-0 is supplied to the mass flow controller 10 from the zeroth thickness detector 4-0.
  • the zeroth actual speed v-0 can be detected relatively easily, since the band feed device 3 does not reshape the cold strip 1. It only has to be ensured that the cold strip 1 has no slippage with respect to the strip feed device 3.
  • the speed v'-1 of the cold rolled strip 1 between the first passed rolling stand 2-1 and the next passed rolling stand 2-2 can be determined by modeling the behavior of the cold strip 1 in the first passed through stand 2-1 in conjunction with the first actual speed v 1 of the rolls 7-1 are determined.
  • other approaches are possible.
  • the mass flow controller 10 determines an additional output signal ⁇ on the basis of the quantities supplied to it (ie the two speeds v-0 and v'-1, the zeroth actual thickness d-0 and optionally the basic output signal ⁇ ). Based on the additional output signal ⁇ - analogous to the basic output ⁇ - the first target speed v-1 * tracked, so that the first actual thickness d-1 of the cold strip 1 is equalized to the first target thickness d-1 * of the cold strip 1. On the other hand, analogous to the basic output signal A, the zeroed setpoint speed v-0 * is not tracked on the basis of the additional output signal 8.
  • the embodiment according to FIG. 2 makes sense, since the correction by the additional output signal 8 - in contrast to the correction by the basic output signal A - is relatively inaccurate, but with much greater dynamics is possible.
  • FIG. 3 essentially shows a similar embodiment as FIG. 1 ,
  • the difference to the design of FIG. 1 is that in addition ramp generator 11 and multiplier 12 are present.
  • the ramp generators 11 gradually increase their output signals from zero to one.
  • the multipliers 12 receive the output of their respective ramp generator 11 and the output of the zeroth and the first forward regulator 9-0, 9-1, respectively, and output as their output the product of their two input signals.
  • the multipliers 12 in conjunction with the ramp generators 11 have the effect of outputting the output of the zeroth and first feedforward controllers 9-0, 9-1, respectively.
  • the feeding of the respective start signal S to the ramp generators 11 takes place at a suitable time.
  • the time is chosen such that it falls within a time range at which a tape head of the cold strip 1 has not yet run into the first rolled stand 2-1 or indeed has already leaked out of the first passed rolling mill 2-1, but still was not entered in the next run through rolling mill 2-2.
  • the ramping therefore takes place during rolling of the cold strip 1.
  • the control device 5 of 1 to 3 can be realized in terms of circuitry. In many cases, however, the control device 5 will be correspondingly FIG. 4 be designed as (software) programmable control device which executes a computer program 13 during operation. Regardless of whether the control device 5 is realized in terms of circuitry or is (software-) programmable, the control device 5 may alternatively be a control method according to the above-explained basic principle of the present invention or a control method according to one of the above-explained preferred embodiments of the control method according to the invention realize.
  • control device 5 is software-programmable
  • the corresponding computer program 13 has machine code 14.
  • the machine code 14 can be executed directly by the control device 5.
  • the execution of the machine code 14 by the controller 5 causes the controller 5 to control the cold rolling line according to one of the above-explained control methods.
  • the computer program 13 can already be deposited in the control device 5 during the production of the control device 5. Alternatively, it is possible to supply the computer program 13 to the control device 5 via a computer-computer connection (for example a LAN or the Internet). Again alternatively, it is possible to store the computer program 13 on a data carrier 15 and the computer program 13 to supply the control device 5 via the data carrier 15. Purely by way of example is in FIG. 4 the disk 15 shown as a CD-ROM. However, it could alternatively be designed differently, for example as a USB memory stick or as a memory card.
  • FIG. 4 shows two alternative embodiments of the tape feeding device 3, namely on the one hand as an S-roll set (as in the 1 to 3 ) and on the other hand as uncoiler (only in FIG. 4 ).
  • the latter embodiment of the band feeding device 3 is of course also in the Kaltwalzstra ⁇ en according to the 1 to 3 realizable.
  • the present invention has many advantages. In particular, it is achieved that the first actual thickness d-1 of the cold strip 1 is set correctly. In connection with the zeroth forward regulator 9-0, it is also achieved that the mass flow through the cold rolling mill is also set correctly. Nevertheless, the control engineering structure of the control device 5 on a captivating simplicity. In particular, only a few interlinked regulations are required. Furthermore, during operation of the cold rolling train according to the invention, a significantly improved dimensional accuracy of the actual thickness d-n behind last passed rolling mill 2-n of the cold rolling mill, both under static operating conditions and under dynamic operating conditions (for example, accelerating or decelerating the cold strip 1 or weld pass). Furthermore, the additional output signal 8 of the mass flow controller 10 is a direct indication of the modeling quality of the overfeed and can thus be used in an outstanding manner for a possible adaptation of a process model 16.

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Description

Die vorliegende Erfindung betrifft ein Regelverfahren für eine Kaltwalzstraße, die mehrere von einem Kaltband nacheinander durchlaufene Walzgerüste und eine dem zuerst durchlaufenen Walzgerüst vorgeordnete Bandzuführeinrichtung aufweist,

  • wobei der Bandzuführeinrichtung eine nullte Sollgeschwindigkeit zugeführt wird, so dass die Bandzuführeinrichtung das Kaltband dem zuerst durchlaufenen Walzgerüst mit einer mit der nullten Sollgeschwindigkeit korrespondierenden nullten Istgeschwindigkeit zuführt,
  • wobei dem zuerst durchlaufenen Walzgerüst eine erste Sollgeschwindigkeit zugeführt wird, so dass Walzen des zuerst durchlaufenen Walzgerüsts mit einer mit der ersten Sollgeschwindigkeit korrespondierenden ersten Istgeschwindigkeit rotieren,
  • wobei mittels einer zwischen dem zuerst durchlaufenen Walzgerüst und dem als nächstes durchlaufenen Walzgerüst angeordneten ersten Dickenerfassungseinrichtung eine erste Istdicke des Kaltbandes erfasst wird,
  • wobei anhand der ersten Istdicke des Kaltbandes und einer ersten Solldicke des Kaltbandes ein Grundausgangssignal ermittelt wird.
The present invention relates to a control method for a cold rolling mill, which has a plurality of rolling stands successively passed through a cold strip and a strip feeding device arranged upstream of the first rolled stand,
  • the strip feed device being fed a zero setpoint speed such that the strip feed device feeds the cold strip to the first pass through the rolling mill with a zero actual speed corresponding to the zero setpoint speed,
  • wherein a first set speed is supplied to the first passed rolling stand, so that rolls of the rolling stand which has passed first rotate at a first actual speed corresponding to the first set speed,
  • wherein a first actual thickness of the cold strip is detected by means of a first thickness detection device arranged between the first passed through rolling mill and the next passed rolling mill stand,
  • wherein based on the first actual thickness of the cold strip and a first desired thickness of the cold strip, a basic output signal is determined.

Aus JP- A 2004268084 ist bekannt, die Banddicke am Ausgang einer Tandemwalzstrasse zu regeln, indem starke Bandzugänderungen zwischen den einzelnen Walzgerüsten vermieden werden. Dazu wird die Walzenumfangsgeschwindigkeit des dem Walzgerüst N vorgelagerten Walzgerüstes N-1 mittels eines Koeffizienten angepasst. Der Koeffizient wird auf Basis der Abweichung zwischen dem Zielwert der Banddicke und der mittels des Massenflussgesetzes geschätzten Bandausgangsdicke ermittelt.Out JP-A 2004268084 It is known to regulate the strip thickness at the exit of a tandem rolling mill by avoiding strong strip tension changes between the individual rolling stands. For this purpose, the roller circumferential speed of the roll stand N upstream of the roll stand N-1 is adjusted by means of a coefficient. The coefficient is determined based on the deviation between the target value of the strip thickness and the tape exit thickness estimated by the mass flow law.

Die vorliegende Erfindung betrifft weiterhin ein Computerprogramm, das Maschinencode aufweist, der von einer Steuereinrichtung einer mehrgerüstigen Walzstraße unmittelbar ausführbar ist und dessen Ausführung durch die Steuereinrichtung bewirkt, dass die Steuereinrichtung die Kaltwalzstraße gemäß einem derartigen Regelverfahren regelt. Weiterhin betrifft die vorliegende Erfindung einen Datenträger mit einem auf dem Datenträger gespeicherten derartigen Computerprogramm.The present invention further relates to a computer program comprising machine code which is directly executable by a control device of a multi-stand rolling mill and whose execution by the control means causes the control means to control the cold rolling mill according to such a control method. Furthermore, the present invention relates to a data carrier with a stored on the disk such a computer program.

Weiterhin betrifft die vorliegende Erfindung eine Steuereinrichtung einer Kaltwalzstraße, die mehrere von einem Kaltband nacheinander durchlaufene Walzgerüste und eine dem zuerst durchlaufenen Walzgerüst vorgeordnete Bandzuführeinrichtung aufweist,

  • wobei die Steuereinrichtung der Bandzuführeinrichtung eine nullte Sollgeschwindigkeit zuführt, so dass die Bandzuführeinrichtung das Kaltband dem zuerst durchlaufenen Walzgerüst mit einer mit der nullten Sollgeschwindigkeit korrespondierenden nullten Istgeschwindigkeit zuführt,
  • wobei die Steuereinrichtung dem zuerst durchlaufenen Walzgerüst eine erste Sollgeschwindigkeit zuführt, so dass Walzen des zuerst durchlaufenen Walzgerüsts mit einer mit der ersten Sollgeschwindigkeit korrespondierenden ersten Istgeschwindigkeit rotieren,
  • wobei die Steuereinrichtung von einer ersten Dickenerfassungseinrichtung, die zwischen dem zuerst durchlaufenen Walzgerüst und dem als nächstes durchlaufenen Walzgerüst angeordnet ist, eine erste Istdicke des Kaltbandes entgegen nimmt,
  • wobei die Steuereinrichtung einen Dickenregler aufweist, der anhand der ersten Istdicke des Kaltbandes und einer ersten Solldicke des Kaltbandes ein Grundausgangssignal ermittelt.
Furthermore, the present invention relates to a control device of a cold rolling mill, the more of a cold strip having successively passed mill stands and a belt feeder arranged upstream of the first pass through the rolling stand,
  • wherein the control means feeds a zero target speed to the tape feeder so that the tape feeder feeds the cold strip to the first rolled mill at a zero actual speed corresponding to the zeroth set speed,
  • wherein the control device supplies a first set speed to the first rolling mill passed through, such that rolls of the rolling mill which has passed through first rotate at a first actual speed corresponding to the first set speed,
  • wherein the control device accepts a first actual thickness of the cold strip from a first thickness detection device, which is arranged between the first rolling stand passed through and the rolling stand passed through next,
  • wherein the control device has a thickness controller which determines a basic output signal based on the first actual thickness of the cold strip and a first desired thickness of the cold strip.

Schließlich betrifft die vorliegende Erfindung eine Kaltwalzstraße,

  • wobei die Kaltwalzstraße mehrere von einem Kaltband nacheinander durchlaufene Walzgerüste aufweist,
  • wobei die Kaltwalzstraße eine dem zuerst durchlaufenen Walzgerüst vorgeordnete Bandzuführeinrichtung aufweist,
  • wobei die Kaltwalzstraße eine erste Dickenerfassungseinrichtung aufweist, die zwischen dem zuerst durchlaufenen Walzgerüst und dem als nächstes durchlaufenen Walzgerüst angeordnet ist und mittels derer eine erste Istdicke des Kaltbandes erfasst wird,
  • wobei die Kaltwalzstraße eine Steuereinrichtung der obenstehend beschriebenen Art aufweist, so dass die Kaltwalzstraße gemäß einem Regelverfahren der obenstehend beschriebenen Art betrieben wird.
Finally, the present invention relates to a cold rolling mill,
  • wherein the cold rolling mill has a plurality of rolling stands through which a cold strip passes in succession,
  • wherein the cold rolling mill has a belt feed device arranged upstream of the first rolled mill,
  • wherein the cold rolling line has a first thickness detecting device, which is arranged between the first passed rolling stand and the next passed rolling stand and by means of which a first actual thickness of the cold strip is detected,
  • wherein the cold rolling line has a control device of the type described above, so that the cold rolling mill is operated according to a control method of the type described above.

Diese Gegenstände sind allgemein bekannt.These items are well known.

Aus der DE 39 25 104 A1 ist eine Vorrichtung zur Banddickenregelung bei eingerüstigen Kaltwalzwerken bekannt, wobei die Vorrichtung einen Abhaspel für den in das Walzgerüst des Kaltwalzwerks einlaufenden Bandteil und einen Aufhaspel für den aus dem Walzgerüst auslaufenden Bandteil aufweist. Es ist eine Einrichtung zur Regelung der Drehzahl des Abhaspels in dem Sinne vorgesehen, dass die Geschwindigkeit des einlaufenden Bandteiles in Relation zur Geschwindigkeit des auslaufenden Bandteiles entsprechend der gewünschten Stichabnahme geregelt wird. In der DE 39 25 104 A1 ist weiterhin ausgeführt, dass durch diese Maßnahmen das entsprechende Massenflussprinzip realisiert wird und die Anwendung dieses Prinzips zur Regelung von mehrgerüstigen Kaltbandstraßen grundsätzlich bekannt sei.From the DE 39 25 104 A1 a device for strip thickness control in single-stand cold rolling mills is known, wherein the device comprises a reel for the incoming in the rolling stand of the cold rolling mill strip part and a reel for the expiring from the rolling mill strip part. It is provided a device for controlling the speed of the uncoiler in the sense that the speed of the incoming band part is controlled in relation to the speed of the expiring band part according to the desired stitch reduction. In the DE 39 25 104 A1 is further stated that the corresponding mass flow principle is realized by these measures and the application of this principle for the regulation of multistage cold strip mills is basically known.

Bei mehrgerüstigen Kaltwalzstraßen werden die Banddicken und die Bandzüge üblicherweise nach dem Massenfluss-Regelkonzept eingestellt, vorzugsweise in der erweiterten Variante, bei der eine einlaufseitig angeordnete Bandzuführeinrichtung als nulltes Walzgerüst betrachtet wird. Über die Vorgabe der Bandgeschwindigkeiten in den einzelnen Sektionen der mehrgerüstigen Walzstraße (also zwischen je zwei unmittelbar benachbarten Walzgerüsten) stellen sich quasi-automatisch die gewünschten Banddicken ein. Da die Istgeschwindigkeiten des Kaltbandes in den einzelnen Sektionen jedoch nur mittelbar über die Walzenumfangsgeschwindigkeiten der Walzgerüste eingestellt werden können, ist die Voreilung der Istgeschwindigkeiten des Kaltbandes in den einzelnen Sektionen gegenüber den Walzengeschwindigkeiten ein Unsicherheitsfaktor. Die zunehmend höheren Anforderungen an die Maßhaltigkeit der Walzprodukte erfordern daher neue Methoden, um diese Unsicherheiten in der Voreilung ausschalten zu können.In multi-stand cold rolling mills, the strip thicknesses and the strip tensions are usually set according to the mass flow control concept, preferably in the extended variant, in which a belt-feed device arranged on the inlet side is considered to be the zero-stage rolling stand. By specifying the belt speeds in the individual sections of the multi-stand rolling train (ie between each two immediately adjacent rolling stands), the desired belt thicknesses are quasi-automatically set. However, since the actual speeds of the cold strip in the individual sections can only be set indirectly via the roller circumferential speeds of the rolling stands, the overfeed of the actual speeds of the cold strip in the individual sections relative to the roller speeds is an uncertainty factor. The increasingly high demands on the dimensional stability of the rolled products therefore require new methods in order to be able to eliminate these uncertainties in the overfeed.

Zur Lösung der obenstehend erläuterten Problematik ist bekannt, Dickenfehler, die sich aus den nicht bekannten Voreilungen in den Zwischengerüsten ergeben, durch einen Dickenregelkreis im Auslauf der Kaltwalzstraße zu bedämpfen. Insbesondere in der üblichsten Betriebsart, bei der das letzte Walzgerüst der Kaltwalzstraße im Dressierbetrieb arbeitet (also nur mit sehr geringer Dickenabnahme von beispielsweise 1 % bis 2 %), kann die langsame Monitorregelung am Auslauf der Kaltwalzstraße diese Dickenfehler nur unzureichend korrigieren.In order to solve the problem explained above, it is known that thickness errors, which result from the not known overvoltages in the intermediate stands, through a thickness control loop to steam at the outlet of the cold rolling mill. In particular, in the most common mode in which the last rolling stand of the cold rolling mill in the tempering works (ie only with very small thickness decrease of for example 1% to 2%), the slow monitor control at the outlet of the cold rolling mill can correct these thickness error insufficient.

Es ist bekannt, die Voreilung an den wesentlichen Arbeitspunkten jedes Walzgerüsts zu modellieren. Hierdurch werden die Walzenumfangsgeschwindigkeiten derart vorgesteuert, dass die Istgeschwindigkeiten des Kaltbandes in den einzelnen Sektionen den entsprechenden Sollwerten möglichst nahe kommen. Wenn weiterhin - was insbesondere bei Kaltwalzwerken mit einem S-Rollensatz im Einlauf möglich ist - der einlaufende Materialfluss auf einen Soll-Massenfluss festgelegt werden kann, wirken sich bei Nutzung der bekannten Zugregelkonzepte die Voreilungsunsicherheiten kaum auf die Zieldickenqualität aus.It is known to model the overfeed at the essential operating points of each rolling stand. As a result, the roller circumferential speeds are pre-controlled in such a way that the actual speeds of the cold strip in the individual sections come as close as possible to the corresponding desired values. If, in addition - which is possible in particular in cold rolling mills with an S-roll set in the inlet - the incoming material flow can be set to a desired mass flow, affect with the use of the known Zugregelkonzepte the Voreilungsunsicherheiten hardly on the target quality.

Die Aufgabe der vorliegenden Erfindung besteht darin, Möglichkeiten zu schaffen, mittels derer die auslaufende Istdicken mindestens eines der Walzgerüste korrekt eingestellt werden kann. Die Möglichkeit soll hierbei mit einer korrekten Einstellung des einlaufseitigen Massenflusses kombiniert sein.The object of the present invention is to provide possibilities by means of which the outgoing actual thicknesses of at least one of the rolling stands can be set correctly. The possibility should in this case be combined with a correct setting of the inlet-side mass flow.

Die Aufgabe wird für ein Regelverfahren der eingangs beschriebenen Art dadurch gelöst,

  • dass anhand des Grundausgangssignals die erste Sollgeschwindigkeit, nicht aber die nullte Sollgeschwindigkeit nachgeführt wird, so dass die erste Istdicke des Kaltbandes an die erste Solldicke des Kaltbandes angeglichen wird,
  • dass mittels einer zwischen der Bandzuführeinrichtung und dem zuerst durchlaufenen Walzgerüst angeordneten nullten Dickenerfassungseinrichtung eine nullte Istdicke des Kaltbandes erfasst wird und
  • dass mittels eines nullten Vorwärtsreglers die nullte Sollgeschwindigkeit derart nachgeführt wird, dass das Produkt von nullter Sollgeschwindigkeit und nullter Istdicke auf einen Sollmassenfluss eingestellt wird.
The problem is solved for a control method of the type described above,
  • that the first setpoint speed, but not the zeroth setpoint speed, is tracked on the basis of the basic output signal, so that the first actual thickness of the cold strip is matched to the first setpoint thickness of the cold strip,
  • in that a zeroth actual thickness of the cold strip is detected by means of a zeroed thickness detection device arranged between the strip feed device and the first rolled stand
  • that by means of a zeroth forward controller, the zeroth setpoint speed is tracked such that the product of zero setpoint speed and zero actual thickness is set to a desired mass flow.

Hiermit korrespondierend ist das Computerprogramm derart ausgebildet, dass es diese Maßnahmen bewirkt. Ebenso weist der Datenträger ein entsprechendes Computerprogramm auf.Corresponding thereto, the computer program is designed such that it causes these measures. Likewise, the disk has a corresponding computer program.

Weiterhin wird die Aufgabe für die obenstehend beschriebene Steuereinrichtung durch die korrespondierende Maßnahmen gelöst. Die erfindungsgemäße Kaltwalzstraße weist eine derartige Steuereinrichtung auf, so dass die Steuereinrichtung im Betrieb die Kaltwalzstraße entsprechend einem derartigen Regelverfahren betreibt.Furthermore, the object is achieved for the control device described above by the corresponding measures. The cold rolling mill according to the invention has such a control device, so that the control device in operation operates the cold rolling mill according to such a control method.

In einer bevorzugten Ausgestaltung des Regelverfahrens ist vorgesehen,

  • dass die Steuereinrichtung einen Massenflussregler aufweist, der von einer nullten Dickenerfassungseinrichtung, die zwischen der Bandzuführeinrichtung und dem zuerst durchlaufenen Walzgerüst angeordnet ist, eine nullte Istdicke des Kaltbandes entgegen nimmt,
  • dass der Massenflussregler weiterhin die nullte Istgeschwindigkeit und eine Istgeschwindigkeit des Kaltbandes zwischen dem zuerst durchlaufenen Walzgerüst und dem als nächstes durchlaufenen Walzgerüst entgegen nimmt und
  • dass der Massenflussregler anhand der von ihm entgegen genommenen Größen ein Zusatzausgangssignal ermittelt, anhand dessen die erste Sollgeschwindigkeit, nicht aber die nullte Sollgeschwindigkeit, nachgeführt wird, so dass die erste Istdicke des Kaltbandes an die erste Solldicke des Kaltbandes angeglichen wird.
In a preferred embodiment of the control method is provided
  • in that the control device has a mass flow controller which accepts a zeroth actual thickness of the cold strip from a zeroth thickness detection device, which is arranged between the strip feed device and the first continuous rolling mill,
  • that the mass flow controller continues to receive the zeroth actual speed and an actual speed of the cold strip between the first passed rolling stand and the next passed rolling stand and
  • that the mass flow controller determines an additional output signal on the basis of the quantities taken from it, on the basis of which the first set speed, but not the zeroth set speed, is tracked, so that the first actual thickness of the cold strip is made equal to the first set thickness of the cold strip.

Durch diese Maßnahme kann eine höhere Regeldynamik erreicht werden.By this measure, a higher control dynamics can be achieved.

In einer bevorzugten Ausgestaltung der letztgenannten Ausführungsform nimmt der Massenflussregler auch das Grundausgangssignal entgegen.In a preferred embodiment of the latter embodiment, the mass flow controller also receives the basic output signal.

In einer weiter bevorzugten Ausgestaltung gibt der nullte Vorwärtsregler sein Ausgangssignal beim Zuschalten des nullten Vorwärtsreglers gerampt aus. Durch diese letztgenannte Maßnahme ergibt sich ein sanfteres, stabileres Zuschalten des nullten Vorwärtsreglers.In a further preferred refinement, the zeroth forward regulator emits its output signal when the zeroth forward regulator is switched on. This latter measure results in a smoother, more stable connection of the zeroth forward controller.

In einer weiterhin bevorzugten Ausgestaltung der vorliegenden Erfindung ist vorgesehen, dass die Steuereinrichtung einen ersten Vorwärtsregler aufweist, der von der ersten Dickenerfassungseinrichtung die erste Istdicke entgegen nimmt. Der erste Vorwärtsregler führt in diesem Fall die erste Sollgeschwindigkeit und die nullte Sollgeschwindigkeit gleichartig nach.In a further preferred embodiment of the present invention, it is provided that the control device has a first forward regulator, which receives the first actual thickness from the first thickness detection device. In this case, the first feedforward controller simulates the first setpoint speed and the zero setpoint speed.

In einer besonders bevorzugten Ausgestaltung der letztgenannten Ausführungsform gibt der erste Vorwärtsregler sein Ausgangssignal beim Zuschalten des ersten Vorwärtsreglers gerampt aus. Durch diese letztgenannte Maßnahme ergibt sich ein sanfteres, stabileres Zuschalten des ersten Vorwärtsreglers.In a particularly preferred embodiment of the last-mentioned embodiment, the first forward regulator emits its output signal when the first forward regulator is switched on. This latter measure results in a smoother, more stable connection of the first forward regulator.

Die obenstehend beschriebenen Ausgestaltungen des Regelverfahrens sind auch bei dem Computerprogramm und der Steuereinrichtung realisierbar.The above-described embodiments of the control method can also be implemented in the computer program and the control device.

Die Steuereinrichtung kann schaltungstechnisch realisiert sein. In der Regel ist die Steuereinrichtung jedoch als programmierbare Steuereinrichtung ausgebildet, die im Betrieb ein Computerprogramm der obenstehend beschriebenen Art ausführt.The control device can be implemented by circuitry. In general, however, the control device is designed as a programmable control device, which executes a computer program of the type described above during operation.

Die Bandzuführeinrichtung kann nach Bedarf ausgebildet sein. Beispielsweise kann sie als S-Rollensatz oder als Abhaspel ausgebildet sein.The tape feeding device may be formed as needed. For example, it can be designed as an S-roll set or as a uncoiler.

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

FIG 1
schematisch eine Kaltwalzstraße einschließlich einer Steuereinrichtung für die Kaltwalzstraße,
FIG 2 und 3
schematisch die Anordnung von FIG 1 mit abgewandelter Steuereinrichtung und
FIG 4
eine mögliche Ausgestaltung der Steuereinrichtungder FIG 1 bis 3.
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 cold rolling mill including a controller for the cold rolling mill,
FIGS. 2 and 3
schematically the arrangement of FIG. 1 with a modified control device and
FIG. 4
a possible embodiment of the Steuereinrichtungder 1 to 3 ,

Gemäß FIG 1 weist eine Kaltwalzstraße zum Walzen eines Kaltbandes 1 mehrere Walzgerüste 2 auf. Die Walzgerüste 2 werden von dem Kaltband 1 nacheinander durchlaufen.According to FIG. 1 For example, a cold rolling mill for rolling a cold strip 1 has a plurality of rolling stands 2. The rolling stands 2 are passed through by the cold strip 1 in succession.

Soweit erforderlich, ist nachfolgend den Walzgerüsten 2 mit Bindestrich jeweils eine Ziffer oder der Buchstabe n nachgestellt. Hierbei steht die Ziffer "1" für das zuerst durchlaufene Walzgerüst 2, die Ziffer "2" für das nächste durchlaufene Walzgerüst 2 und der Buchstabe "n" für das zuletzt durchlaufene Walzgerüst 2. Die gleiche Vorgehensweise wird auch in Verbindung mit anderen mit Bezugszeichen bezeichneten Elementen und Größen ergriffen, soweit dies erforderlich ist.If necessary, below each of the rolling stands 2 with hyphen one digit or letter n is readjusted. Here, the numeral "1" stands for the first rolled stand 2, the numeral "2" for the next passed rolling mill 2 and the letter "n" for the last passed through rolling mill 2. The same procedure is also used in conjunction with other denoted by reference numerals Elements and sizes are taken as necessary.

Die Kaltwalzstraße weist weiterhin eine Bandzuführeinrichtung 3 auf. Die Bandzuführeinrichtung 3 ist dem zuerst durchlaufenen Walzgerüst 2-1 vorgeordnet. Die Bandzuführeinrichtung 3 ist gemäß FIG 1 als S-Rollensatz ausgebildet. Die Bandzuführeinrichtung 3 wird nachfolgend teilweise als "nulltes Walzgerüst" bezeichnet. Hiermit korrespondierend sind Elemente und Größen, die sich auf die Bandzuführeinrichtung 3 beziehen, soweit erforderlich, mit dem Zusatz "-0" versehen.The cold rolling mill furthermore has a strip feeding device 3. The strip feeding device 3 is arranged upstream of the rolling stand 2-1 which has passed through first. The tape feeder 3 is according to FIG. 1 designed as an S-roll set. The tape feeder 3 will be hereinafter referred to as "zeroth mill stand". Corresponding elements and sizes that relate to the tape feeder 3, if necessary, provided with the suffix "-0".

Die Kaltwalzstraße weist weiterhin eine erste Dickenerfassungseinrichtung 4-1 auf. Die erste Dickenerfassungseinrichtung 4-1 ist dem zuerst durchlaufenen Walzgerüst 2-1 nachgeordnet, also zwischen dem zuerst durchlaufenen Walzgerüst 2-1 und dem als nächstes durchlaufenen Walzgerüst 2-2 angeordnet. Mittels der ersten Dickenerfassungseinrichtung 4-1 wird eine erste Istdicke d-1 des Kaltbandes 1 erfasst, also die Istdicke d-1, mit der das Kaltband 1 aus dem zuerst durchlaufenen Walzgerüst 2-1 ausläuft.The cold rolling mill further comprises a first thickness detecting device 4-1. The first thickness detection device 4-1 is arranged downstream of the first continuous rolling mill 2-1, that is to say between the first pass through the rolling stand 2-1 and the next rolling mill 2-2. By means of the first thickness detection device 4-1, a first actual thickness d-1 of the cold strip 1 is detected, that is to say the actual thickness d-1, with which the cold strip 1 runs out of the rolling mill 2-1 first passed through.

Schließlich weist die Kaltwalzstraße eine Steuereinrichtung 5 auf. Die Steuereinrichtung 5 führt ein Regelverfahren aus, das nachfolgend detailliert erläutert wird. Auf Grund der Arbeitsweise der Steuereinrichtung 5 wird die Kaltwalzstraße folglich gemäß einem derartigen Regelverfahren betrieben.Finally, the cold rolling mill on a control device 5. The control device 5 carries out a control method, which will be explained in detail below. Due to the operation of the control device 5, the cold rolling mill is thus operated according to such a control method.

Gemäß FIG 1 führt die Steuereinrichtung 5 der Bandzuführeinrichtung 3 eine nullte Sollgeschwindigkeit v-0* zu. Die Bandzuführeinrichtung 3 nimmt die nullte Sollgeschwindigkeit v-0* entgegen und stellt sich so ein, dass sie das Kaltband 1 dem zuerst durchlaufenen Walzgerüst 2-1 mit einer nullten Istgeschwindigkeit v-0 zuführt. Die nullte Istgeschwindigkeit v-0 korrespondiert hierbei mit der nullten Sollgeschwindigkeit v-0*. Zum Einstellen der nullten Istgeschwindigkeit v-0 kann die Bandzuführeinrichtung 3 beispielsweise einen nullten Geschwindigkeitsregler 6-0 aufweisen, der die nullte Istgeschwindigkeit v-0 der Bandzuführeinrichtung 3 entsprechend regelt.According to FIG. 1 the control device 5 of the strip feeding device 3 supplies a zeroth setpoint speed v-0 *. The tape feeder 3 receives the zeroth set speed v-0 * and adjusts itself so that it feeds the cold strip 1 to the first passed through stand 2-1 with a zeroth actual speed v-0. The zeroth actual speed v-0 corresponds in this case to the zeroth setpoint speed v-0 *. To set the zeroth actual speed v-0, the band feeding device 3 may have, for example, a zeroth speed controller 6-0 which correspondingly controls the zeroth actual speed v-0 of the band feed device 3.

Die Bandzuführeinrichtung 3 wird, wie bereits erwähnt, in logischer Hinsicht als nulltes Walzgerüst angesehen. Sie walzt das Kaltband 1 jedoch nicht. Eine Voreilung oder dergleichen tritt bezüglich der Bandzuführeinrichtung 3 daher nicht auf. Die Umfangsgeschwindigkeit der Bandzuführeinrichtung 3 korrespondiert daher direkt mit der nullten Istgeschwindigkeit v-0. Es muss lediglich beachtet werden, dass das Kaltband 1 nicht durchrutscht.The tape feeder 3 is, as already mentioned, logically considered zeroth mill stand. However, it does not roll the cold strip 1. An overfeed or the like therefore does not occur with respect to the tape feeder 3. The peripheral speed of the tape feeder 3 therefore corresponds directly to the zeroth actual speed v-0. It only needs to be noted that the cold strip 1 does not slip.

In analoger Weise führt die Steuereinrichtung 5 dem zuerst durchlaufenen Walzgerüst 2-1 eine erste Sollgeschwindigkeit v-1* zu. Das zuerst durchlaufene Walzgerüst 2-1 nimmt die erste Sollgeschwindigkeit v-1* entgegen und stellt sich so ein, dass Walzen 7-1 des zuerst durchlaufenen Walzgerüsts 2-1 mit einer ersten Istgeschwindigkeit v-1 rotieren, die mit der ersten Sollgeschwindigkeit v-1* korrespondiert.In an analogous manner, the control device 5 supplies the first rolling mill 2-1, which has passed through, to a first setpoint speed v-1 *. The first run through stand 2-1 receives the first target speed v-1 * and turns this way in that rollers 7-1 of the first-pass rolling mill 2-1 rotate at a first actual speed v-1 corresponding to the first target speed v-1 *.

Das zuerst durchlaufene Walzgerüst 2-1 walzt das Kaltband 1. Das Kaltband 1 tritt daher aus dem zuerst durchlaufenen Walzgerüst 2-1 mit einer Voreilung aus. Eine Istgeschwindigkeit v'-1 des Kaltbandes 1 hinter dem zuerst durchlaufenen Walzgerüst 2-1 ist daher größer als die erste Istgeschwindigkeit v-1. Hierauf wird später noch näher eingegangen werden.The first rolled mill 2-1 rolls the cold strip 1. The cold strip 1 therefore exits from the first pass through stand 2-1 with an overfeed. An actual speed v'-1 of the cold strip 1 behind the first passed through stand 2-1 is therefore greater than the first actual speed v-1. This will be discussed later in more detail.

Mittels der ersten Dickenerfassungseinrichtug 4-1 wird, wie bereits erwähnt, die erste Istdicke d-1 erfasst. Die erste Dickenerfassungseinrichtung 4-1 führt die von ihr erfasste erste Istdicke d-1 der Steuereinrichtung 5 zu. Die Steuereinrichtung 5 nimmt die erste Istdicke d-1 entgegen.By means of the first thickness detection device 4-1, as already mentioned, the first actual thickness d-1 is detected. The first thickness detection device 4-1 supplies the first actual thickness d-1 of the control device 5 detected by it. The control device 5 receives the first actual thickness d-1.

Die Steuereinrichtung 5 weist intern einen Dickenregler 8 auf. Der Dickenregler 8 kann beispielsweise als P-, PI-, PID-, oder anderer Regler ausgebildet sein. Dem Dickenregler 8 werden die erste Istdicke d-1 sowie eine erste Solldicke d-1* zugeführt. Der Dickenregler 8 ermittelt anhand der ersten Istdicke d-1 des Kaltbandes 1 und einer ersten Solldicke d-1* des Kaltbandes 1 ein Grundausgangssignal Δ. Anhand des Grundausgangssignals Δ führt die Steuereinrichtung 5 die erste Sollgeschwindigkeit v-1* nach, so dass die erste Istdicke d-1 des Kaltbandes 1 an die erste Solldicke d-1* des Kaltbandes 1 angeglichen wird. Das Grundausgangssignal Δ dient jedoch lediglich zum Nachführen der ersten Sollgeschwindigkeit v-1*. Hingegen wird die nullte Sollgeschwindigkeit v-0* nicht nachgeführt, zumindest nicht anhand des Grundausgangssignals Δ.The control device 5 has a thickness regulator 8 internally. The thickness controller 8 may be designed, for example, as a P, PI, PID, or other controller. The thickness regulator 8 is supplied with the first actual thickness d-1 and a first desired thickness d-1 *. Based on the first actual thickness d-1 of the cold strip 1 and a first desired thickness d-1 * of the cold strip 1, the thickness controller 8 determines a basic output signal Δ. Based on the basic output signal Δ, the control device 5 performs the first setpoint speed v-1 *, so that the first actual thickness d-1 of the cold strip 1 is adjusted to the first setpoint thickness d-1 * of the cold strip 1. However, the basic output signal Δ serves only for tracking the first setpoint speed v-1 *. On the other hand, the zeroth setpoint speed v-0 * is not tracked, at least not based on the basic output signal Δ.

Durch die erfindungsgemäße Ausgestaltung und Wirkungsweise der Steuereinrichtung 5 wird erreicht, dass das Kaltband 1 mit einer korrekten ersten Istdicke d-1 in das als nächstes durchlaufene Walzgerüst 2-2 einläuft. Eine nennenswerte Korrektur eines Dickenfehlers im letzten Walzgerüst 2-n ist daher nicht erforderlich.Due to the inventive design and operation of the control device 5 is achieved that the cold strip 1 enters with a correct first actual thickness d-1 in the next run through rolling mill 2-2. A noteworthy correction a thickness error in the last stand 2-n is therefore not required.

Gemäß FIG 1 weist die Kaltwalzstraße weiterhin eine nullte Dickenerfassungseinrichtung 4-0 auf. Die nullte Dickenerfassungseinrichtung 4-0 ist zwischen der Bandzuführeinrichtung 3 und den zuerst durchlaufenen Walzgerüst 2-1 angeordnet. Sie erfasst eine nullte Istdicke d-0 des Kaltbandes 1, also die Istdicke d-0, mit der das Kaltband 1 in das zuerst durchlaufene Walzgerüst 2-1 einläuft.According to FIG. 1 the cold rolling mill further has a zeroth thickness detecting device 4-0. The zeroth thickness detecting device 4-0 is disposed between the tape feeder 3 and the first passed through stand 2-1. It detects a zeroth actual thickness d-0 of the cold strip 1, that is to say the actual thickness d-0, with which the cold strip 1 enters the first rolling stand 2-1.

Die nullte Dickenerfassungseinrichtung 4-0 führt die nullte Istdicke d-0 einem nullten Vorwärtsregler 9-0 zu. Der nullte Vorwärtsregler 9-0 ist hierbei Bestandteil der Steuereinrichtung 5. Der nullte Vorwärtsregler 9-0 nimmt die nullte Istdicke d-0 entgegen. Er führt die nullte Sollgeschwindigkeit v-0* derart nach, dass das Produkt von nullter Sollgeschwindigkeit v-0* und nullter Istdicke d-0 auf einen Sollmassenfluss eingestellt wird. Der nullte Vorwärtsregler 9-0 berücksichtigt hierbei vorzugsweise einen Abstand, den die nullte Dickenerfassungseinrichtung 4-0 vom zuerst durchlaufenen Walzgerüst 2-1 aufweist, eine Dynamik der Bandzuführeinrichtung 3 und den zeitlichen Verlauf der nullten Istgeschwindigkeit v-0. Durch diese Maßnahmen kann - entsprechend einer Wegverfolgung - erreicht werden, dass die Bandzuführeinrichtung 3 zeitrichtig (nämlich dann, wenn die jeweils korrespondierende Stelle des Kaltbandes 1 das zuerst durchlaufene Walzgerüst 2-1 erreicht) mit der entsprechenden nullten Sollgeschwindigkeit v-0* beaufschlagt wird.The zeroth thickness detector 4-0 supplies the zeroth actual thickness d-0 to a zeroth forward controller 9-0. The zeroth forward regulator 9-0 is in this case part of the control device 5. The zeroed forward regulator 9-0 accepts the zeroth actual thickness d-0. It performs the zero setpoint speed v-0 * in such a way that the product of zero setpoint speed v-0 * and zero actual thickness d-0 is set to a desired mass flow. In this case, the zeroed forward regulator 9-0 preferably takes into account a distance that the zeroth thickness detection device 4-0 has from the rolling stand 2 - 1 passed through first, a dynamics of the belt feed device 3 and the time course of the zeroed actual speed v - 0. By these measures can - according to a tracking - be achieved that the tape feeder 3 time correct (namely, when the respective corresponding point of the cold strip 1, the first traversed mill stand reached 2-1) with the corresponding zero set speed v-0 * is applied.

Das obenstehend erläuterte Prinzip arbeitet bereits recht gut, kann jedoch durch die nachfolgend erläuterten Ausgestaltungen weiter verbessert werden. Die nachfolgenden, in Verbindung mit den FIG 1, 2 und 3 erläuterten bevorzugten Ausgestaltungen sind hierbei nach Bedarf alternativ oder kumuliert realisierbar.The above-explained principle works quite well, but can be further improved by the embodiments explained below. The following, in conjunction with the FIG. 1 . 2 and 3 explained preferred embodiments are hereby alternatively or cumulatively realized as needed.

Entsprechend FIG 1 kann die Steuereinrichtung 5 weiterhin einen ersten Vorwärtsregler 9-1 aufweisen. Der erste Vorwärtsregler 9-1 nimmt von der ersten Dickenerfassungseinrichtung 4-1 die erste Istdicke d-1 entgegen. Der erste Vorwärtsregler 9-1 führt die erste Sollgeschwindigkeit v-1* und die nullte Sollgeschwindigkeit v-0* gleichartig nach.Corresponding FIG. 1 For example, the control device 5 can also have a first forward regulator 9-1. The first forward regulator 9-1 receives the first actual thickness d-1 from the first thickness detection device 4-1. The first forward regulator 9-1 performs the first target speed v-1 * and the zero target speed v-0 * in a similar manner.

Diese Ausgestaltung stellt keinen Widerspruch zur Regelung durch den Dickenregler 8 dar. Denn die Regelung durch den ersten Vorwärtsregler 9-1 weist eine andere (größere) Dynamik auf als die Regelung durch den Dickenregler 8.This embodiment does not contradict the regulation by the thickness controller 8, because the regulation by the first forward regulator 9-1 has a different (greater) dynamic than the regulation by the thickness regulator 8.

Gemäß FIG 2 kann - gegebenenfalls alternativ, im Regelfall zusätzlich - zu der obenstehend beschriebenen Ausgestaltung des erfindungsgemäßen Grundprinzips die Steuereinrichtung 5 einen Massenflussregler 10 aufweisen. Der Massenflussregler 10 nimmt entgegen

  • die nullte Istdicke d-0,
  • die nullte Istgeschwindigkeit v-0 sowie
  • die Istgeschwindigkeit v'-1 des Kaltbandes 1 hinter dem zuerst durchlaufenen Walzgerüst 2-1.
According to FIG. 2 may optionally alternatively, as a rule in addition to the above-described embodiment of the basic principle according to the invention, the control device 5 have a mass flow controller 10. The mass flow controller 10 receives
  • the zeroth actual thickness d-0,
  • the zeroth actual speed v-0 as well
  • the actual speed v'-1 of the cold strip 1 behind the first passed through stand 2-1.

Weiterhin kann der Massenflussregler 10 gegebenenfalls vom Dickenregler 8 das Grundausgangssignal Δ entgegen nehmen.Furthermore, the mass flow controller 10 may optionally accept the basic output signal Δ from the thickness controller 8.

Die nullte Istdicke d-0 wird dem Massenflussregler 10 von der nullten Dickenerfassungseinrichtung 4-0 zugeführt. Die nullte Istgeschwindigkeit v-0 kann relativ einfach erfasst werden, da die Bandzuführeinrichtung 3 das Kaltband 1 nicht umformt. Es muss lediglich gewährleistet sein, dass das Kaltband 1 gegenüber der Bandzuführeinrichtung 3 keinen Schlupf aufweist.The zeroth actual thickness d-0 is supplied to the mass flow controller 10 from the zeroth thickness detector 4-0. The zeroth actual speed v-0 can be detected relatively easily, since the band feed device 3 does not reshape the cold strip 1. It only has to be ensured that the cold strip 1 has no slippage with respect to the strip feed device 3.

Die Geschwindigkeit v'-1 des Kaltbandes 1 zwischen dem zuerst durchlaufenen Walzgerüst 2-1 und dem als nächstes durchlaufenen Walzgerüst 2-2 kann anhand einer Modellierung des Verhaltens des Kaltbandes 1 im zuerst durchlaufenen Walzgerüst 2-1 in Verbindung mit der ersten Istgeschwindigkeit v-1 der Walzen 7-1 ermittelt werden. Es sind jedoch auch andere Vorgehensweisen möglich. Insbesondere ist es möglich, die Geschwindigkeit v'-1 des Kaltbandes 1 hinter dem zuerst durchlaufenen Walzgerüst 2-1 zu messen, beispielsweise mittels an sich bekannter optischer Verfahren oder über die Drehzahl einer an das Kaltband 1 angestellten Messrolle.The speed v'-1 of the cold rolled strip 1 between the first passed rolling stand 2-1 and the next passed rolling stand 2-2 can be determined by modeling the behavior of the cold strip 1 in the first passed through stand 2-1 in conjunction with the first actual speed v 1 of the rolls 7-1 are determined. However, other approaches are possible. In particular, it is possible to measure the speed v'-1 of the cold-rolled strip 1 behind the rolling stand 2-1 which has been passed through first, for example by means of optical methods known per se or via the rotational speed of a measuring roll set against the cold strip 1.

Der Massenflussregler 10 ermittelt anhand der ihm zugeführten Größen (also der beiden Geschwindigkeiten v-0 und v'-1, der nullten Istdicke d-0 und gegebenenfalls des Grundausgangssignals Δ) ein Zusatzausgangssignal δ. Anhand des Zusatzausgangssignals δ wird - analog zum Grundausgangssignal Δ - die erste Sollgeschwindigkeit v-1* nachgeführt, so dass die erste Istdicke d-1 des Kaltbandes 1 an die erste Solldicke d-1* des Kaltbandes 1 angeglichen wird. Anhand des Zusatzausgangssignals 8 wird hingegen - analog zum Grundausgangssignal A - nicht die nullte Sollgeschwindigkeit v-0* nachgeführt.The mass flow controller 10 determines an additional output signal δ on the basis of the quantities supplied to it (ie the two speeds v-0 and v'-1, the zeroth actual thickness d-0 and optionally the basic output signal Δ). Based on the additional output signal δ - analogous to the basic output Δ - the first target speed v-1 * tracked, so that the first actual thickness d-1 of the cold strip 1 is equalized to the first target thickness d-1 * of the cold strip 1. On the other hand, analogous to the basic output signal A, the zeroed setpoint speed v-0 * is not tracked on the basis of the additional output signal 8.

Die Ausgestaltung gemäß FIG 2 ist sinnvoll, da die Korrektur durch das Zusatzausgangssignal 8 - im Gegensatz zur Korrektur durch das Grundausgangssignal A - zwar relativ ungenau ist, dafür jedoch mit erheblich größerer Dynamik möglich ist.The embodiment according to FIG. 2 makes sense, since the correction by the additional output signal 8 - in contrast to the correction by the basic output signal A - is relatively inaccurate, but with much greater dynamics is possible.

FIG 3 zeigt im Wesentlichen eine ähnliche Ausgestaltung wie FIG 1. Der Unterschied zur Ausgestaltung von FIG 1 besteht darin, dass zusätzlich Rampengeber 11 und Multiplizierer 12 vorhanden sind. Wenn den Rampengebern 11 ein jeweiliges Startsignal S zugeführt wird, erhöhen die Rampengeber 11 ihre Ausgangssignale nach und nach von Null auf Eins. Die Multiplizierer 12 nehmen das Ausgangssignal ihres jeweiligen Rampengebers 11 sowie das Ausgangssignal des nullten bzw. des ersten Vorwärtsreglers 9-0, 9-1 entgegen und geben als ihr Ausgangssignal das Produkt ihrer beiden Eingangsignale aus. Damit haben die Multiplizier 12 in Verbindung mit den Rampengebern 11 die Wirkung, dass das Ausgangssignal des nullten bzw. des ersten Vorwärtsreglers 9-0, 9-1 gerampt ausgegeben wird. FIG. 3 essentially shows a similar embodiment as FIG. 1 , The difference to the design of FIG. 1 is that in addition ramp generator 11 and multiplier 12 are present. When a respective start signal S is supplied to the ramp generators 11, the ramp generators 11 gradually increase their output signals from zero to one. The multipliers 12 receive the output of their respective ramp generator 11 and the output of the zeroth and the first forward regulator 9-0, 9-1, respectively, and output as their output the product of their two input signals. Thus, the multipliers 12 in conjunction with the ramp generators 11 have the effect of outputting the output of the zeroth and first feedforward controllers 9-0, 9-1, respectively.

Das Zuführen des jeweiligen Startsignals S zu den Rampengebern 11 erfolgt zu einem geeigneten Zeitpunkt. Der Zeitpunkt ist hierbei derart gewählt, dass er in einem Zeitbereich fällt, zu dem ein Bandkopf des Kaltbandes 1 noch nicht in das zuerst durchlaufene Walzgerüst 2-1 eingelaufen ist bzw. zwar bereits aus dem zuerst durchlaufenen Walzgerüst 2-1 ausgetreten ist, jedoch noch nicht in das als nächstes durchlaufene Walzgerüst 2-2 eingelaufen ist. Das Rampen erfolgt daher beim Anwalzen des Kaltbandes 1.The feeding of the respective start signal S to the ramp generators 11 takes place at a suitable time. The time is chosen such that it falls within a time range at which a tape head of the cold strip 1 has not yet run into the first rolled stand 2-1 or indeed has already leaked out of the first passed rolling mill 2-1, but still was not entered in the next run through rolling mill 2-2. The ramping therefore takes place during rolling of the cold strip 1.

Die Steuereinrichtung 5 der FIG 1 bis 3 kann schaltungstechnisch realisiert sei. In vielen Fällen wird die Steuereinrichtung 5 jedoch entsprechend FIG 4 als (software-)programmierbare Steuereinrichtung ausgebildet sein, die im Betrieb ein Computerprogramm 13 ausführt. Unabhängig davon, ob die Steuereinrichtung 5 schaltungstechnisch realisiert ist oder (software-)programmierbar ist, kann die Steuereinrichtung 5 jedoch im Betrieb alternativ ein Regelverfahren gemäß dem obenstehend erläuterten Grundprinzip der vorliegenden Erfindung oder ein Regelverfahren gemäß einer der obenstehend ebenfalls erläuterten bevorzugten Ausgestaltungen des erfindungsgemäßen Regelverfahrens realisieren.The control device 5 of 1 to 3 can be realized in terms of circuitry. In many cases, however, the control device 5 will be correspondingly FIG. 4 be designed as (software) programmable control device which executes a computer program 13 during operation. Regardless of whether the control device 5 is realized in terms of circuitry or is (software-) programmable, the control device 5 may alternatively be a control method according to the above-explained basic principle of the present invention or a control method according to one of the above-explained preferred embodiments of the control method according to the invention realize.

Wenn die Steuereinrichtung 5 softwareprogrammierbar ist, weist das entsprechende Computerprogramm 13 Maschinencode 14 auf. Der Maschinencode 14 ist von der Steuereinrichtung 5 unmittelbar ausführbar. Das Ausführen des Maschinencodes 14 durch die Steuereinrichtung 5 bewirkt, dass die Steuereinrichtung 5 die Kaltwalzstraße gemäß einem der obenstehend näher erläuterten Regelverfahren regelt.If the control device 5 is software-programmable, the corresponding computer program 13 has machine code 14. The machine code 14 can be executed directly by the control device 5. The execution of the machine code 14 by the controller 5 causes the controller 5 to control the cold rolling line according to one of the above-explained control methods.

Das Computerprogramm 13 kann bereits bei der Herstellung der Steuereinrichtung 5 in der Steuereinrichtung 5 hinterlegt werden. Alternativ ist es möglich, das Computerprogramm 13 der Steuereinrichtung 5 über eine Rechner-Rechner-Verbindung (beispielsweise ein LAN oder das Internet) zuzuführen. Wiederum alternativ ist es möglich, das Computerprogramm 13 auf einem Datenträger 15 zu speichern und das Computerprogramm 13 der Steuereinrichtung 5 über den Datenträger 15 zuzuführen. Rein beispielhaft ist in FIG 4 der Datenträger 15 als CD-ROM dargestellt. Er könnte jedoch alternativ andersartig ausgebildet sein, beispielsweise als USB-Memorystick oder als Speicherkarte.The computer program 13 can already be deposited in the control device 5 during the production of the control device 5. Alternatively, it is possible to supply the computer program 13 to the control device 5 via a computer-computer connection (for example a LAN or the Internet). Again alternatively, it is possible to store the computer program 13 on a data carrier 15 and the computer program 13 to supply the control device 5 via the data carrier 15. Purely by way of example is in FIG. 4 the disk 15 shown as a CD-ROM. However, it could alternatively be designed differently, for example as a USB memory stick or as a memory card.

FIG 4 zeigt weiterhin zwei alternative Ausgestaltungen der Bandzuführeinrichtung 3, nämlich einerseits als S-Rollensatz (wie in den FIG 1 bis 3) und andererseits als Abhaspel (nur in FIG 4). Die letztgenannte Ausgestaltung der Bandzuführeinrichtung 3 ist selbstverständlich auch bei den Kaltwalzstra-βen gemäß den FIG 1 bis 3 realisierbar. FIG. 4 shows two alternative embodiments of the tape feeding device 3, namely on the one hand as an S-roll set (as in the 1 to 3 ) and on the other hand as uncoiler (only in FIG. 4 ). The latter embodiment of the band feeding device 3 is of course also in the Kaltwalzstra βen according to the 1 to 3 realizable.

Die vorliegende Erfindung weist viele Vorteile auf. Insbesondere wird erreicht, dass die erste Istdicke d-1 des Kaltbandes 1 korrekt eingestellt wird. In Verbindung mit dem nullten Vorwärtsregler 9-0 wird weiterhin erreicht, dass auch der Massenfluss durch die Kaltwalzstraße korrekt eingestellt wird. Dennoch weist der regelungstechnische Aufbau der Steuerungseinrichtung 5 eine bestechende Einfachheit auf. Insbesondere sind nur wenige miteinander verkoppelte Regelungen erforderlich. Weiterhin ergibt sich im Betrieb der erfindungsgemäßen Kaltwalzstraße eine deutlich verbesserte Maßhaltigkeit der Istdicke d-n hinter zuletzt durchlaufenen Walzgerüst 2-n der Kaltwalzstraße, und zwar sowohl unter statischen Betriebsbedingungen als auch unter dynamischen Betriebsbedingungen (beispielsweise Beschleunigen oder Verzögern des Kaltbandes 1 oder Schweißnahtdurchlauf). Weiterhin ist das Zusatzausgangssignal 8 des Massenflussreglers 10 ein direktes Indiz für die Modellierungsgüte der Voreilung und kann somit in hervorragender Weise zu einer etwaigen Adaption eines Prozessmodells 16 verwendet werden.The present invention has many advantages. In particular, it is achieved that the first actual thickness d-1 of the cold strip 1 is set correctly. In connection with the zeroth forward regulator 9-0, it is also achieved that the mass flow through the cold rolling mill is also set correctly. Nevertheless, the control engineering structure of the control device 5 on a captivating simplicity. In particular, only a few interlinked regulations are required. Furthermore, during operation of the cold rolling train according to the invention, a significantly improved dimensional accuracy of the actual thickness d-n behind last passed rolling mill 2-n of the cold rolling mill, both under static operating conditions and under dynamic operating conditions (for example, accelerating or decelerating the cold strip 1 or weld pass). Furthermore, the additional output signal 8 of the mass flow controller 10 is a direct indication of the modeling quality of the overfeed and can thus be used in an outstanding manner for a possible adaptation of a process model 16.

Die obige Beschreibung dient ausschließlich der Erläuterung der vorliegenden Erfindung. Der Schutzumfang der vorliegenden Erfindung soll hingegen ausschließlich durch die beigefügten Ansprüche bestimmt sein.The above description is only for explanation of the present invention. The scope of the present invention, however, is intended to be determined solely by the appended claims.

Claims (13)

  1. Regulation method for a cold-rolling mill train which has a plurality of rolling stands (2), through which a cold strip (1) passes in succession, and a strip feeding device (3) arranged upstream of the rolling stand (2-1) passed through first,
    - wherein a zeroth desired speed (v-0*) is supplied to the strip feeding device (3) so that the strip feeding device (3) feeds the cold strip (1) to the rolling stand (2-1) passed through first at a zeroth actual speed (v-0) which corresponds to the zeroth desired speed (v-0*),
    - wherein a first desired speed (v-1*) is supplied to the rolling stand (2-1) passed through first so that rolls (7-1) of the rolling stand (2-1) passed through first rotate at a first actual speed (v-1) which corresponds to the first desired speed (v-1*),
    - wherein a first thickness detection device (4-1) arranged between the rolling stand (2-1) passed through first and the rolling stand (2-2) passed through next is used to detect a first actual thickness (d-1) of the cold strip (1),
    - wherein a basic output signal (0) is determined on the basis of the first actual thickness (d-1) of the cold strip (1) and a first desired thickness (d-1*) of the cold strip (1),
    - wherein the first desired speed (v-1*), but not the zeroth desired speed (v-0*), is adjusted on the basis of the basic output signal (0), so that the first actual thickness (d-1) of the cold strip (1) is matched to the first desired thickness (d-1*) of the cold strip (1),
    - wherein a zeroth thickness detection device (4-0) arranged between the strip feeding device (3) and the rolling stand (2-1) passed through first is used to detect a zeroth actual thickness (d-0) of the cold strip (1),
    - wherein a zeroth feed-forward regulator (9-0) is used to adjust the zeroth desired speed (v-0*) in such a way that the product of zeroth desired speed (v-0*) and zeroth actual thickness (d-0) is set to a desired mass flow.
  2. Regulation method according to Claim 1,
    characterized
    - in that the control device (5) has a mass flow regulator (10) which receives a zeroth actual thickness (d-0) of the cold strip (1) from a zeroth thickness detection device (4-0) arranged between the strip feeding device (3) and the rolling stand (2-1) passed through first,
    - in that the mass flow regulator (10) furthermore receives the zeroth actual speed (v-0) and an actual speed (vi-I) of the cold strip (1) between the rolling stand (2-1) passed through first and the rolling stand (2-2) passed through next, and
    - in that the mass flow regulator (10) uses the variables (v-0, viz-1, d-0) which it has received to determine an additional output signal (0), on the basis of which the first desired speed (v-1*), but not the zeroth desired speed (v-0*), is adjusted, so that the first actual thickness (d-1) of the cold strip (1) is matched to the first desired thickness (d-1*) of the cold strip (1).
  3. Regulation method according to Claim 2,
    characterized in that the mass flow regulator (10) also receives the basic output signal (Δ).
  4. Regulation method according to Claim 1, 2 or 3, characterized in that the zeroth feed-forward regulator (9-0) outputs its output signal in ramped form when the zeroth feed-forward regulator (9-0) is connected.
  5. Regulation method according to one of the preceding claims,
    characterized in that a first feed-forward regulator (9-1), which receives the first actual thickness (d-1) of the cold strip (1) from the first thickness detection device (4-1), is used to adjust the first desired speed (v-1*) and the zeroth desired speed (v-0*) in the same way.
  6. Regulation method according to Claim 5,
    characterized in that the first feed-forward regulator (9-1) outputs its output signal in ramped form when the first feed-forward regulator (9-1) is connected.
  7. Computer program which has machine code (14) which can be executed directly by a control device (5) for a multi-stand cold-rolling mill train, and the execution of which by the control device (5) has the effect that the control device (5) regulates the cold-rolling mill train in accordance with a regulation method according to one of the preceding claims.
  8. Data storage medium having a computer program (13) according to Claim 7 stored on the data storage medium.
  9. Control device for a cold-rolling mill train which has a plurality of rolling stands (2), through which a cold strip (1) passes in succession, and a strip feeding device (3) arranged upstream of the rolling stand (2-1) passed through first,
    - wherein the control device supplies a zeroth desired speed (v-0*) to the strip feeding device (3) so that the strip feeding device (3) feeds the cold strip (1) to the rolling stand (2-1) passed through first at a zeroth actual speed (v-0) which corresponds to the zeroth desired speed (v-0*),
    - wherein the control device supplies a first desired speed (v-1*) to the rolling stand (2-1) passed through first so that rolls (7-1) of the rolling stand (2-1) passed through first rotate at a first actual speed (v-1) which corresponds to the first desired speed (v-1*),
    - wherein the control device receives a first actual thickness (d-1) of the cold strip (1) from a first thickness detection device (4-1) arranged between the rolling stand (2-1) passed through first and the rolling stand (2-2) passed through next,
    - wherein the control device has a thickness regulator (8) which determines a basic output signal (Δ) on the basis of the first actual thickness (d-1) of the cold strip (1) and a first desired thickness (d-1*) of the cold strip (1),
    - wherein the control device adjusts the first desired speed (v-1*), but not the zeroth desired speed (v-0*), on the basis of the basic output signal (Δ), so that the first actual thickness (d-1) of the cold strip (1) is matched to the first desired thickness (d-1*) of the cold strip (1),
    - wherein the control device (5) has a zeroth feed-forward regulator (9-0) which receives a zeroth actual thickness (d-0) of the cold strip (1) from a zeroth thickness detection device (4-0) arranged between the strip feeding device (3) and the rolling stand (2-1) passed through first,
    - wherein the zeroth feed-forward regulator (9-0) adjusts the zeroth desired speed (v-0*) in such a way that the product of zeroth desired speed (v-0*) and zeroth actual thickness (d-0) is set to a desired mass flow.
  10. Control device according to Claim 9,
    characterized in that the device is designed in such a manner that it carries out a regulation method according to one of Claims 2 to 6.
  11. Control device according to Claim 9 or 10,
    characterized in that the device is designed as a programmable control device which, during operation, executes a computer program (13) according to Claim 7.
  12. Cold-rolling mill train,
    - wherein the cold-rolling mill train has a plurality of rolling stands (2) through which a cold strip (1) passes in succession,
    - wherein the cold-rolling mill train has a strip feeding device (3) arranged upstream of the rolling stand (2-1) passed through first,
    - wherein the cold-rolling mill train has a first thickness detection device (4-1), which is arranged between the rolling stand (2-1) passed through first and the rolling stand (2-2) passed through next and is used to detect a first actual thickness (d-1) of the cold strip (1),
    - wherein the cold-rolling mill train has a control device (5) according to Claim 9, 10 or 11, so that the cold-rolling mill train is operated in accordance with a regulation method according to one of Claims 1 to 6.
  13. Cold-rolling mill train according to Claim 12, characterized in that the strip feeding device (3) is designed as a tension bridle or as an uncoiler.
EP09705015A 2008-01-31 2009-01-16 Regulation method for a cold-rolling train with complete mass flow regulation Active EP2252416B1 (en)

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DE102009012028A1 (en) * 2009-03-10 2010-09-23 Converteam Gmbh Method for operating a rolling train, in particular a cold rolling mill
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JP5783925B2 (en) * 2012-02-08 2015-09-24 株式会社日立製作所 Control device for hot tandem rolling mill and control method for hot tandem rolling mill
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JP6324259B2 (en) * 2014-08-19 2018-05-16 株式会社日立製作所 Rolling control device, rolling control method, and rolling control program
JP7411518B2 (en) * 2020-08-11 2024-01-11 株式会社日立製作所 Plant control device, rolling control device, plant control method, and plant control program
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DE102008007057A1 (en) 2009-08-13
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US8459075B2 (en) 2013-06-11
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WO2009095323A1 (en) 2009-08-06
US20100326154A1 (en) 2010-12-30

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