EP1448321B1 - Inclined position adjustment - Google Patents

Inclined position adjustment Download PDF

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Publication number
EP1448321B1
EP1448321B1 EP02792602A EP02792602A EP1448321B1 EP 1448321 B1 EP1448321 B1 EP 1448321B1 EP 02792602 A EP02792602 A EP 02792602A EP 02792602 A EP02792602 A EP 02792602A EP 1448321 B1 EP1448321 B1 EP 1448321B1
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EP
European Patent Office
Prior art keywords
bending
inclined position
control circuit
controller
position controller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP02792602A
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German (de)
French (fr)
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EP1448321A1 (en
Inventor
Andreas Maierhofer
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Siemens AG
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Siemens AG
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    • 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
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/38—Control of flatness or profile during rolling of strip, sheets or plates using roll bending
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • B21B2013/025—Quarto, four-high stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2203/00—Auxiliary arrangements, devices or methods in combination with rolling mills or rolling methods
    • B21B2203/18—Rolls or rollers
    • B21B2203/187—Tilting rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B29/00—Counter-pressure devices acting on rolls to inhibit deflection of same under load, e.g. backing rolls ; Roll bending devices, e.g. hydraulic actuators acting on roll shaft ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • B21B31/32—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis by liquid pressure, e.g. hydromechanical adjusting
    • 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

Definitions

  • the invention relates to a method and apparatus for adjusting the skew of working or drive rollers of a roll stand, in particular for cold strip rolling, wherein at least one bending cylinder and a servo valve is provided on the working and on the operating side of the rolling stand, and wherein the Bending of the drive rollers is controlled in each case via a bending control circuit of the drive and the operating side.
  • a control method for a rolling stand for rolling a strip is known from DE-OS 196 18 712.
  • the control method described here uses a roll bending model to determine set values for the rolling force, the rebound force and the roll displacement on the roll stand.
  • the nip is driven over the employment.
  • This consists of a modern design of two hydraulic cylinders with appropriate electrical equipment such as encoders and valves. The latter adjust over half the set of rolls the nip. The second half of the set of rolls is set for rolling operation.
  • the positioning possibilities are the position or rolling force and the inclined position.
  • the position or rolling force is essentially used for the reduction in the number of passes ("rolling off"), and the angle of attack is essentially for the simulation of the strip profile.
  • the skew is also an actuator for correcting the belt run.
  • the disadvantage of this procedure is that not directly the roll gap is driven, but this is done via the coupling employment roll package. This can lead to not inconsiderable inaccuracies, which, for example, make a band progression unmanageable.
  • the object is achieved by a method for adjusting the inclination of the drive rollers of a rolling stand, in particular for Kaltbandwalz Non, wherein the bending of the drive rollers is controlled in each case via a bending control loop of the drive and the operating side, wherein a skew control takes place with the aid of the bending control loop.
  • a servo valve is provided on the working and on the operating side of the rolling stand, wherein position sensors are provided for detecting the path change caused by the bending cylinders.
  • the position sensors are mounted in or on the bending cylinders. In this way, the path change caused by the bending cylinders can be detected particularly precisely.
  • the roll gap 106 is limited by the drive rollers 105a, 105b.
  • the drive rollers 105a, 105b preferably support rollers 104a, 104b are arranged.
  • positioning cylinders 101a, 101b are provided with the aid of which the adjustment of the rollers 104a, 104b, 105a, 105b can be influenced.
  • a bending cylinder 102a, 102b is provided in each case.
  • more than one bending cylinder 102a or 102b may be provided on each side of the rolling stand.
  • the bending cylinders 102a, 102b are preferably controlled by valves.
  • the rolling stand also has position sensors 103a, 103b, which can be integrated in the bending cylinders 102a or 102b or can be provided separately.
  • position sensors 103a, 103b which can be integrated in the bending cylinders 102a or 102b or can be provided separately.
  • the roll bending is preferably influenced separately on the working or operating side, since each position sensor 103a, 103b indicate a position actual value.
  • FIG. 2 shows a block diagram of a roll gap skew control.
  • a roll bending control loop 210 is superordinated to a roll bending control loop 210.
  • the actuators of the roll bending control loop 210 are the two bending controls on the drive and operator side.
  • the skew controller 205 the difference between setpoint 203 and actual value 204 of the inclined position is supplied.
  • the skew target value 203 is preferably determined from data 201 input by an operator or supplied by a data processing device.
  • the data 202 for determining the actual value of the inclined position 204 preferably come from position sensors 103a, 103b (see FIG. 1), which are advantageously arranged in the bending cylinder 102a, 102b (see FIG.
  • the output of the skew controller 205 is connected to a tracking 206 and affects the position 207. Further, the output of the skew controller 205 is connected to the roll bending control circuit 210, which will be described in more detail below.
  • the roller bending control circuit 210 has, in particular for controlling the bending of the drive rollers 105a, 105b (see FIG. 1), preferably a drive-side bending control circuit with a controller 215 and a valve 217, and a control loop bending control circuit with a controller 216 and a valve 218.
  • the outputs of the tilt regulator 205 are preferably fed to the bending control circuit of the drive or the bending control circuit of the operating side, each with opposite signs as additional setpoint.
  • the direct setpoint value data which is preferably based on data such as empirical value data from data processing or data storage devices, tables or operator inputs, are taken into account for the setpoint determination on the drive side 211 or for the setpoint determination on the operating side 212.
  • an actual value 213 ,.214 zB a measure of the measured bending force, subtracted and fed to the controller 215 or 216, which controls the valve 217 and 218, respectively.
  • a position controller 203 is supplied, on the one hand, with the sum of all skew setpoint values 302 and, on the other hand, with a negative sign of the actual value 303 of the skew position, which is preferably determined with the aid of the position encoders 103a, 103b (s.FIG 1) in the roll gap.
  • the output of the position controller 301 is connected to a further computing module 309, which preferably has an integrator, with the aid of which a desired value 310 for the tilt control is determined, which is used via a hydraulic adjustment.
  • the output of the position controller 301 is connected to a drive side bending controller 305 and an operating side bending controller 306.
  • the latter is the output of the position controller 301 is supplied with a negative sign.
  • the two bending controllers 305, 306 are additionally supplied with a bending setpoint 304.
  • the bending setpoint 305 is a measure of the bending force desired on the rolling stand.
  • the flexure controllers 305, 306 are connected to servovalves 307, 308 for the drive side and the operation side, respectively.
  • a bending controller 407 set value data 403 or actual value data 404 fed to the bending control.
  • a skew controller 408 is supplied with the sum of all skew setpoint values 405 and the corresponding actual value data 406.
  • the output of the flexure controller 407 is connected to at least one control valve 411.
  • the output of the incline controller 408 is connected to the control valve 412 and in addition to a calculation module 409 for determining a target value 410 for the tilt control via hydraulic adjustment.
  • the output of the tilt regulator 408 is advantageously fed to the at least one control valve 411 with a negative sign, while the output of the bending regulator 407 is advantageously supplied to the control valve 412.
  • a bending target value for the driving side 501 is supplied to a driver for the driving side 505.
  • the actual bending value for the drive side 502 is supplied to the controller 505 with a negative sign.
  • the bending target value for the operating page 503 is fed to a controller for the operating side 506.
  • the Biegeistwert for the operating page 504 is supplied to the controller 506 with a negative sign.
  • the regulators 505 and 506 are connected to valves 507 and 508, respectively.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Optical Communication System (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

The invention relates to a device and a method for adjusting the inclined position of the drive rollers (105a, 105b) of a rolling frame, at least one bending cylinder (102a, 102b) and a servo valve (217, 218) being provided on both the working side and the operating side of the rolling frame. According to the invention, locators (103a, 103b) are used to record the path modification caused by the bending cylinders (102a, 102b) and the classic inclined position adjusting device, which operates with the aid of the positioning cylinders (101a, 101b), is corrected in order to maintain the positioning margin during the bending adjustment. This permits a fine adjustment of the inclined position in the bending units around the working location. In contrast to conventional designs, the inclined position of the rolling gap is adjusted by means of a novel adjustment device, which uses the generators of the rolling gap to obtain the actual value and carries out corrections by means of the bending control circuit (210).

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Einstellung der Schräglage von Arbeits- bzw. Antriebswalzen eines Walzgerüstes, insbesondere für Kaltbandwalzstrassen, wobei an der Arbeits- und an der Bedienseite des Walzgerüsts jeweils mindestens ein Biegezylinder und ein Servoventil vorgesehen ist, bzw. wobei die Biegung der Antriebswalzen jeweils über einen Biegeregelkreis der Antriebs- und der Bedienseite geregelt wird.The invention relates to a method and apparatus for adjusting the skew of working or drive rollers of a roll stand, in particular for cold strip rolling, wherein at least one bending cylinder and a servo valve is provided on the working and on the operating side of the rolling stand, and wherein the Bending of the drive rollers is controlled in each case via a bending control circuit of the drive and the operating side.

Ein Regelverfahren für ein Walzgerüst zum Walzen eines Bandes ist aus der DE-OS 196 18 712 bekannt. Das hier beschriebene Regelverfahren bedient sich eines Walzenb-iegemodells um Sollwerte für die Walzkraft, die Rückbiegekraft und die Walzenverschiebung am Walzgerüst zu ermitteln.A control method for a rolling stand for rolling a strip is known from DE-OS 196 18 712. The control method described here uses a roll bending model to determine set values for the rolling force, the rebound force and the roll displacement on the roll stand.

Überwiegend wird bei Kaltwalzwerken der Walzspalt über die Anstellung gefahren. Diese besteht in moderner Ausführung aus zwei Hydraulikzylindern mit entsprechender elektrischer Ausrüstung wie z.B. Geber und Ventile. Letztere verstellen über den halben Walzensatz den Walzspalt. Die zweite Hälfte des Walzensatzes ist für den Walzbetrieb festgesetzt. Die Stellmöglichkeiten sind dabei die Position oder Walzkraft und die Schräglage. Die Position bzw. Walzkraft dient im Wesentlichen für die Stichabnahme ("Abwalzung"), die Schräglage im Wesentlichen für das Nachbilden des Bandprofiles. Die Schräglage ist darüber auch ein Stellglied zur Korrektur des Bandverlaufes. Der Nachteil dieser Verfahrensweise ist, dass nicht direkt der Walzspalt gefahren wird, sondern dies über die Kopplung Anstellung-Walzenpaket erfolgt. Dies kann zu nicht unerheblichen Ungenauigkeiten führen, die z.B. einen Bandverlauf nicht mehr beherrschbar machen.Predominantly in cold rolling mills the nip is driven over the employment. This consists of a modern design of two hydraulic cylinders with appropriate electrical equipment such as encoders and valves. The latter adjust over half the set of rolls the nip. The second half of the set of rolls is set for rolling operation. The positioning possibilities are the position or rolling force and the inclined position. The position or rolling force is essentially used for the reduction in the number of passes ("rolling off"), and the angle of attack is essentially for the simulation of the strip profile. The skew is also an actuator for correcting the belt run. The disadvantage of this procedure is that not directly the roll gap is driven, but this is done via the coupling employment roll package. This can lead to not inconsiderable inaccuracies, which, for example, make a band progression unmanageable.

Es ist Aufgabe der Erfindung, die voranstehend geschilderte Problematik zu verbessern und die aufgezeigten Nachteile zu mindern.It is an object of the invention to improve the above-described problems and to reduce the disadvantages mentioned.

Die Aufgabe wird gelöst durch ein Verfahren zur Einstellung der Schräglage der Antriebswalzen eines Walzgerüsts, insbesondere für Kaltbandwalzstraßen, wobei die Biegung der Antriebswalzen jeweils über einen Biegeregelkreis der Antriebs- und der Bedienseite geregelt wird, wobei eine Schräglagenregelung mit Hilfe des Biegeregelkreises erfolgt.The object is achieved by a method for adjusting the inclination of the drive rollers of a rolling stand, in particular for Kaltbandwalzstraßen, wherein the bending of the drive rollers is controlled in each case via a bending control loop of the drive and the operating side, wherein a skew control takes place with the aid of the bending control loop.

Es ist besonders vorteilhaft den klassischen Schräglagenregler, der mit Hilfe des Anstellzylinders arbeitet nachzuführen und derart die Stellreserve bei der Biegeregelung zu erhalten. Auf diese Weise erfolgt eine besonders präzise Feinregelung der Schräglage an den Biegeblöcken um den Arbeitspunkt.It is particularly advantageous to track the classic tilt regulator, which works with the help of the Anstellzylinders and thus to obtain the reserve in the bending control. In this way, a particularly precise fine adjustment of the skew takes place at the bending blocks around the operating point.

Es ist des Weiteren von Vorteil, die von den Biegezylindern verursachte Wegänderung dem Schräglagenregler als Istwert zuzuführen.It is also advantageous to supply the path change caused by the bending cylinders to the skew controller as the actual value.

Mit Vorteil wird zur Einstellung der Schräglage von Antriebswalzen eines Walzgerüsts die von den Biegezylindern verursachte Wegänderung einem Schräglagenregler als Istwert zugeführt und die vom Schräglagenregler aus der Differenz von Soll- und Istwert gebildete Stellgröße auf den Biegeregelkreis der Antriebsseite und mit umgekehrten Vorzeichen auf den Biegeregelkreis der Bedienseite gegeben.Advantageously, to adjust the skew of drive rollers of a rolling mill, the path change caused by the bending cylinders fed as an actual value and the skew controller from the difference of nominal and actual value formed control variable to the bending control circuit of the drive side and with opposite signs to the bending control circuit of the operating side given.

Die Aufgabe wird auch gelöst durch eine Vorrichtung gemäß Patentanspruch 5, wobei an der Arbeits- und an der Bedienseite des Walzgerüsts jeweils ein Servoventil vorgesehen ist, wobei Positionsgeber zur Erfassung der von den Biegezylindern verursachten Wegänderung vorgesehen sind.The object is also achieved by a device according to claim 5, wherein in each case a servo valve is provided on the working and on the operating side of the rolling stand, wherein position sensors are provided for detecting the path change caused by the bending cylinders.

Mit Vorteil sind die Positionsgeber in oder an den Biegezylindern angebracht. Derart kann die von den Biegezylindern verursachte Wegänderung besonders präzise erfasst werden.Advantageously, the position sensors are mounted in or on the bending cylinders. In this way, the path change caused by the bending cylinders can be detected particularly precisely.

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

FIG 1
eine schematische Darstellung eines Walzgerüsts,
FIG 2
eine Walzspaltschräglagenregelung in Kaskadenstruktur,
FIG 3
eine Schräglagenregelung in Kaskadenstruktur,
FIG 4
eine Schräglagenregelung in Parallelstruktur,
FIG 5
eine Einzelbiegeregelung für den Eichvorgang.
Further advantages and details of the invention will become apparent from the following description of embodiments with reference to the drawings and in conjunction with the claims. Show it:
FIG. 1
a schematic representation of a roll stand,
FIG. 2
a roll gap skew control in cascade structure,
FIG. 3
a tilt control in cascade structure,
FIG. 4
a tilt regulation in parallel structure,
FIG. 5
a single bend control for the calibration process.

FIG 1 zeigt eine schematische Darstellung eines Walzgerüstes. Dabei wird der Walzspalt 106 durch die Antriebswalzen 105a, 105b begrenzt. Oberhalb bzw. unterhalb der Antriebswalzen 105a,105b sind vorzugsweise Stützwalzen 104a,104b angeordnet. Des weiteren sind oberhalb bzw. unterhalb der Walzen 104a, 104b,105a,105b Anstellzylinder 101a,101b vorgesehen mit Hilfe derer die Anstellung der Walzen 104a,104b,105a,105b beeinflussbar ist. Sowohl an der Arbeits- als auch an der Bedienseite des Walzgerüsts ist jeweils ein Biegezylinder 102a,102b vorgesehen. Alternativ können auch mehr als ein Biegezylinder 102a bzw.102b je Seite des Walzgerüsts vorgesehen werden. Die Biegezylinder 102a,102b werden vorzugsweise durch Ventile angesteuert. Das Walzgerüst weist zudem Positionsgeber 103a, 103b auf, die in den Biegezylindern 102a bzw. 102b integriert oder gesondert vorgesehen sein können. Für die Erfindung ist es wesentlich, dass im Walzspaltbereich Geber und Stellglieder vorhanden sind. Die Walzenbiegung ist vorzugsweise getrennt auf Arbeits- bzw. Bedienseite beeinflussbar, da jeweils Positionsgeber 103a,103b einen Positionsistwert angeben.1 shows a schematic representation of a roll stand. In this case, the roll gap 106 is limited by the drive rollers 105a, 105b. Above or below the drive rollers 105a, 105b preferably support rollers 104a, 104b are arranged. Furthermore, above or below the rollers 104a, 104b, 105a, 105b, positioning cylinders 101a, 101b are provided with the aid of which the adjustment of the rollers 104a, 104b, 105a, 105b can be influenced. Both on the working and on the operating side of the rolling stand, a bending cylinder 102a, 102b is provided in each case. Alternatively, more than one bending cylinder 102a or 102b may be provided on each side of the rolling stand. The bending cylinders 102a, 102b are preferably controlled by valves. The rolling stand also has position sensors 103a, 103b, which can be integrated in the bending cylinders 102a or 102b or can be provided separately. For the invention, it is essential that givers and actuators are present in the nip area. The roll bending is preferably influenced separately on the working or operating side, since each position sensor 103a, 103b indicate a position actual value.

FIG 2 zeigt ein Blockdiagramm einer Walzspaltschräglagenregelung. Dabei ist einem Walzen-Biegeregelkreis 210 ein Schräglagenregler 205 übergeordnet. Die Stellglieder des Walzen-Biegeregelkreises 210 sind die beiden Biegeregelungen auf Antriebs- und Bedienseite.FIG. 2 shows a block diagram of a roll gap skew control. In this case, a roll bending control loop 210 is superordinated to a roll bending control loop 210. The actuators of the roll bending control loop 210 are the two bending controls on the drive and operator side.

Dem Schräglagenregler 205 wird die Differenz zwischen Sollwert 203 und Istwert 204 der Schräglage zugeführt. Der Schräglagensollwert 203 wird vorzugsweise aus Daten 201 ermittelt, die von einem Bediener eingegeben oder von einer Datenverarbeitungseinrichtung zugeführt werden. Die Daten 202 zur Bestimmung des Istwerts der Schräglage 204 stammen vorzugsweise von Positionsgebern 103a,103b (s. FIG 1), die mit Vorteil im Biegezylinder 102a,102b (s. FIG 1) angeordnet sind.The skew controller 205, the difference between setpoint 203 and actual value 204 of the inclined position is supplied. The skew target value 203 is preferably determined from data 201 input by an operator or supplied by a data processing device. The data 202 for determining the actual value of the inclined position 204 preferably come from position sensors 103a, 103b (see FIG. 1), which are advantageously arranged in the bending cylinder 102a, 102b (see FIG.

Der Ausgang des Schräglagenreglers 205 ist mit einer Nachführung 206 verbunden und beeinflusst die Anstellung 207. Des weiteren ist der Ausgang des Schräglagenreglers 205 mit dem Walzen-Biegeregelkreis 210 verbunden, der nachfolgend ausführlicher beschrieben wird.The output of the skew controller 205 is connected to a tracking 206 and affects the position 207. Further, the output of the skew controller 205 is connected to the roll bending control circuit 210, which will be described in more detail below.

Der Walzen-Biegeregelkreis 210 weist insbesondere zur Regelung der Biegung der Antriebswalzen 105a,105b (s. FIG 1) vorzugsweise einen Biegeregelkreis der Antriebsseite mit einem Regler 215 und einem Ventil 217 sowie einen Biegeregelkreis der Bedienseite mit einem Regler 216 und einem Ventil 218 auf. Die Ausgänge des Schräglagenreglers 205 werden dabei dem Biegeregelkreis der Antriebs- bzw. dem Biegeregelkreis der Bedienseite vorzugsweise mit jeweils umgekehrten Vorzeichen als Zusatzsollwert zugeführt. Neben den vom Schräglagenregler 205 stammenden Zusatzsollwerten werden für die Sollwertbestimmung auf Antriebsseite 211 bzw. für die Sollwertbestimmung auf Bedienseite 212 auch die unmittelbaren Sollwertdaten, die vorzugsweise auf Daten wie Erfahrungswertdaten aus Datenverarbeitungs- bzw. Datenspeichereinrichtungen, Tabellen oder Bedienereingaben zurückgehen, berücksichtigt. Sowohl für die Antriebs- als auch für die Bedienseite wird vom jeweils ermittelten Sollwert 211 bzw.212 ein Istwert 213 bzw.214 z.B. ein Maß für die gemessene Biegekraft, abgezogen und dem Regler 215 bzw.216 zugeführt, der das Ventil 217 bzw.218 regelt.The roller bending control circuit 210 has, in particular for controlling the bending of the drive rollers 105a, 105b (see FIG. 1), preferably a drive-side bending control circuit with a controller 215 and a valve 217, and a control loop bending control circuit with a controller 216 and a valve 218. The outputs of the tilt regulator 205 are preferably fed to the bending control circuit of the drive or the bending control circuit of the operating side, each with opposite signs as additional setpoint. In addition to the additional nominal values originating from the inclination regulator 205, the direct setpoint value data, which is preferably based on data such as empirical value data from data processing or data storage devices, tables or operator inputs, are taken into account for the setpoint determination on the drive side 211 or for the setpoint determination on the operating side 212. For both the drive and the operating side of the respectively determined setpoint 211 bzw.212 an actual value 213 bzw.214 zB a measure of the measured bending force, subtracted and fed to the controller 215 or 216, which controls the valve 217 and 218, respectively.

Durch die voranstehend beschriebene Anordnung bzw. Vorgehensweise wird eine Verstellung der Walzspaltschräglage erreicht. Der Unterschied zu herkömmlichen Konzepten ist insbesondere die Verstellung der Walzspaltschräglage mit Hilfe eines neuen Reglers der als Istwert die Walzspaltgeber 103a,103b (s.FIG 1) verwendet und die Korrekturen über den Biegeregelkreis 210 ausführt. Der bekannte Schräglagenregler über die Anstellung wird nunmehr voreingestellt und anschließend bei aktivem neuen Regler immer wieder nachgeführt.By the arrangement or procedure described above, an adjustment of the roll gap skew is achieved. The difference with conventional concepts is in particular the adjustment of the roll gap inclination with the aid of a new regulator which uses as an actual value the nip sensors 103a, 103b (see FIG. 1) and carries out the corrections via the bending control circuit 210. The well-known skew controller on the employment is now preset and then updated with active new controller again and again.

FIG 3 zeigt eine weitere vorteilhafte Ausgestaltung einer Schräglagenregelung in Kaskadenstruktur. Dabei werden einem Positionsregler 203 zum einen die Summe aller Schräglagensollwerte 302 und zum anderen mit negativem Vorzeichen der vorzugsweise mit Hilfe der Positionsgeber 103a,103b (s.FIG 1) im Walzspalt ermittelte Istwert 303 der Schräglage zugeführt. Der Ausgang des Positionsreglers 301 ist mit einem weiteren Rechenmodul 309, das vorzugsweise ein Integrierglied aufweist, verbunden, mit Hilfe dessen ein Sollwert 310 für die Schräglagenregelung ermittelt wird, der über eine hydraulische Anstellung verwendet wird. Der Ausgang des Positionsreglers 301 ist mit einem Biegeregler 305 für die Antriebsseite und einem Biegeregler 306 für die Bedienseite verbunden. Letzterem wird der Ausgang des Positionsreglers 301 mit negativem Vorzeichen zugeführt. Den beiden Biegereglern 305,306 wird zudem ein Biegesollwert 304 zugeführt. Der Biegesollwert 305 ist ein Maß für die am Walzgerüst gewünschte Biegekraft. Die Biegeregler 305,306 sind mit Servoventilen 307 bzw.308 für die Antriebsseite bzw. für die Bedienseite verbunden.3 shows a further advantageous embodiment of a tilt control in cascade structure. In this case, a position controller 203 is supplied, on the one hand, with the sum of all skew setpoint values 302 and, on the other hand, with a negative sign of the actual value 303 of the skew position, which is preferably determined with the aid of the position encoders 103a, 103b (s.FIG 1) in the roll gap. The output of the position controller 301 is connected to a further computing module 309, which preferably has an integrator, with the aid of which a desired value 310 for the tilt control is determined, which is used via a hydraulic adjustment. The output of the position controller 301 is connected to a drive side bending controller 305 and an operating side bending controller 306. The latter is the output of the position controller 301 is supplied with a negative sign. The two bending controllers 305, 306 are additionally supplied with a bending setpoint 304. The bending setpoint 305 is a measure of the bending force desired on the rolling stand. The flexure controllers 305, 306 are connected to servovalves 307, 308 for the drive side and the operation side, respectively.

Alternativ zu der voranstehend beschriebenen Kaskadenstruktur kann auch eine Parallelstruktur verwendet werden, wie sie in FIG 4 dargestellt ist. Gemäß der Anordnung in Parallelstruktur werden zum einen einem Biegeregler 407 Sollwertdaten 403 bzw. Istwertdaten 404 zur Biegeregelung zugeführt. Zum anderen werden einem Schräglagenregler 408 die Summe aller Schräglagensollwerte 405 sowie die korrespondierenden Istwertdaten 406 zugeführt. Der Ausgang des Biegereglers 407 ist mit mindestens einem Stellventil 411 verbunden. Der Ausgang des Schräglagenreglers 408 ist mit dem Stellventil 412 und zusätzlich mit einem Rechenmodul 409 zur Bestimmung eines Sollwerts 410 für die Schräglagenregelung über hydraulische Anstellung verbunden. Der Ausgang des Schräglagenreglers 408 wird mit Vorteil dem mindestens einen Stellventil 411 mit negativem Vorzeichen zugeführt, während der Ausgang des Biegereglers 407 mit Vorteil dem Stellventil 412 zugeführt wird.As an alternative to the cascade structure described above, it is also possible to use a parallel structure, as shown in FIG. According to the arrangement in parallel structure, firstly, a bending controller 407 set value data 403 or actual value data 404 fed to the bending control. On the other hand, a skew controller 408 is supplied with the sum of all skew setpoint values 405 and the corresponding actual value data 406. The output of the flexure controller 407 is connected to at least one control valve 411. The output of the incline controller 408 is connected to the control valve 412 and in addition to a calculation module 409 for determining a target value 410 for the tilt control via hydraulic adjustment. The output of the tilt regulator 408 is advantageously fed to the at least one control valve 411 with a negative sign, while the output of the bending regulator 407 is advantageously supplied to the control valve 412.

FIG 5 zeigt eine Einzelbiegeregelung für den Eichvorgang. Zum Eichen wird ein Biegesollwert für die Antriebsseite 501 einem Regler für die Antriebsseite 505 zugeführt. Der Biegeistwert für die Antriebsseite 502 wird dem Regler 505 mit negativem Vorzeichen zugeführt. Der Biegesollwert für die Bedienseite 503 wird einem Regler für die Bedienseite 506 zugeführt. Der Biegeistwert für die Bedienseite 504 wird dem Regler 506 mit negativem Vorzeichen zugeführt. Die Regler 505 und 506 sind mit Ventilen 507 bzw. 508 verbunden.5 shows a single bending control for the calibration process. For calibrating, a bending target value for the driving side 501 is supplied to a driver for the driving side 505. The actual bending value for the drive side 502 is supplied to the controller 505 with a negative sign. The bending target value for the operating page 503 is fed to a controller for the operating side 506. The Biegeistwert for the operating page 504 is supplied to the controller 506 with a negative sign. The regulators 505 and 506 are connected to valves 507 and 508, respectively.

Claims (6)

  1. Method for adjusting the inclined position of drive rolls (105a, 105b) of a roll stand, especially for cold strip rolling trains, the bending of the drive rolls (105a, 105b) respectively being controlled by means of a bending control circuit of the drive side and of the operating side, characterized in that an inclined position adjustment is made with the aid of the bending control circuit (210).
  2. Method according to Claim 1, characterized in that the inclined position adjustment comprises an inclined position controller (205), the inclined position controller being a traditional inclined position controller, in that the traditional inclined position controller, which works with the aid of the adjusting cylinder (101a, 101b), is positionally adjusted so as thus to receive the control reserve in the bending adjustment.
  3. Method according to one of the previous claims, characterized in that the inclined position adjustment comprises an inclined position controller (205), in that the actual value (204) fed to the inclined position controller (205) is the distance alteration caused by the bending cylinders (102a, 102b).
  4. Method according to Claim 3, characterized in that a control variable formed by the inclined position controller (205) from the difference between the desired value (203) and the fed actual value (204) is transmitted to the bending control circuit of the drive side and, with reversed signs, to the bending control circuit of the operating side.
  5. Device for adjusting the inclined position of drive rolls (105a, 105b) of a roll stand, on the work side and on the operating side of the roll stand, respectively, at least one bending cylinder (102a, 102b) and one servo valve (217, 218) being provided, and position transmitters (103a, 103b) being provided for detecting the distance alteration caused by the bending cylinders (102a, 102b), characterized in that the bending control circuit (210), for the implementation of a method according to one of the previous claims, being coupled to an inclined position controller (205).
  6. Device according to Claim 5, characterized in that the position transmitters (103a, 103b) are fitted in or on the bending cylinders (102a, 102b).
EP02792602A 2001-11-23 2002-11-21 Inclined position adjustment Expired - Fee Related EP1448321B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10157333 2001-11-23
DE10157333 2001-11-23
PCT/DE2002/004283 WO2003045598A1 (en) 2001-11-23 2002-11-21 Inclined position adjustment

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EP1448321A1 EP1448321A1 (en) 2004-08-25
EP1448321B1 true EP1448321B1 (en) 2006-05-24

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EP (1) EP1448321B1 (en)
AT (1) ATE327059T1 (en)
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WO (1) WO2003045598A1 (en)

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Publication number Priority date Publication date Assignee Title
CN100413610C (en) * 2005-11-30 2008-08-27 宝山钢铁股份有限公司 Control method for preventing head-bent of band-steel while milling course
DE102011078139A1 (en) 2011-06-07 2012-12-13 Sms Siemag Ag Measuring device, rolling stand and method for detecting the height of a roll gap
JP6838083B2 (en) * 2016-03-08 2021-03-03 ノベリス・インコーポレイテッドＮｏｖｅｌｉｓ Ｉｎｃ． Methods and equipment for controlling metal strip profiles during rolling using direct measurement of process parameters

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JPS5739010A (en) * 1980-08-22 1982-03-04 Ishikawajima Harima Heavy Ind Co Ltd Rolling mill
JPS5881505A (en) * 1981-11-11 1983-05-16 Mitsubishi Heavy Ind Ltd Controller for roll shape and hunting of rolling mill
JPS59212108A (en) * 1983-05-17 1984-12-01 Sumitomo Metal Ind Ltd Method for controlling shape of sheet

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EP1448321A1 (en) 2004-08-25
WO2003045598A1 (en) 2003-06-05
DE50206930D1 (en) 2006-06-29
ATE327059T1 (en) 2006-06-15

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