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WO2003008122A1 - Cold rolling mill and method for cold roll forming a metallic strip - Google Patents

Cold rolling mill and method for cold roll forming a metallic strip Download PDF

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Publication number
WO2003008122A1
WO2003008122A1 PCT/EP2002/007689 EP0207689W WO03008122A1 WO 2003008122 A1 WO2003008122 A1 WO 2003008122A1 EP 0207689 W EP0207689 W EP 0207689W WO 03008122 A1 WO03008122 A1 WO 03008122A1
Authority
WO
WIPO (PCT)
Prior art keywords
strip
stand
cold rolling
reel device
roll
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.)
Ceased
Application number
PCT/EP2002/007689
Other languages
German (de)
French (fr)
Other versions
WO2003008122A8 (en
Inventor
Udo Brockes
Olaf Norman Jepsen
Michael Zielenbach
Manfred Stachuletz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Demag AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7691436&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2003008122(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to EP02767196A priority Critical patent/EP1406735B1/en
Priority to BR0209768-0A priority patent/BR0209768A/en
Priority to DE50202231T priority patent/DE50202231D1/en
Priority to JP2003513719A priority patent/JP2005500163A/en
Priority to AT02767196T priority patent/ATE288798T1/en
Application filed by SMS Demag AG filed Critical SMS Demag AG
Priority to CA002453297A priority patent/CA2453297A1/en
Priority to KR10-2003-7015711A priority patent/KR20040014541A/en
Priority to US10/483,706 priority patent/US20040177666A1/en
Publication of WO2003008122A1 publication Critical patent/WO2003008122A1/en
Anticipated expiration legal-status Critical
Publication of WO2003008122A8 publication Critical patent/WO2003008122A8/en
Ceased legal-status Critical Current

Links

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
    • B21B37/48—Tension control; Compression control
    • B21B37/50—Tension control; Compression control by looper 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
    • 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
    • B21B37/24—Automatic variation of thickness according to a predetermined programme
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
    • B21B39/08—Braking or tensioning arrangements
    • 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
    • B21B1/30—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 non-continuous process
    • B21B1/32—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 non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
    • B21B1/36—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 non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by cold-rolling
    • 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
    • B21B2037/002—Mass flow control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B41/00—Guiding, conveying, or accumulating easily-flexible work, e.g. wire, sheet metal bands, in loops or curves; Loop lifters

Definitions

  • the invention relates to a cold rolling mill and a method for cold rolling metallic strip, in particular steel, with a single stand with means for adjusting a roll gap and with a reel device upstream of the cold rolling stand for uncoiling the strip and with a reel device downstream of the cold rolling stand for reeling the strip. of.
  • WO 99/55474 describes a Steckel rolling mill for hot rolling with at least one reversing roll stand and upstream and downstream reels.
  • a loop lifter is provided between the reels and the reversing roll stand, which provides actual values for tension control and mass flow control.
  • such a Steckel rolling mill relates to a hot rolling mill and therefore not to a cold rolling process.
  • the object of the invention is to provide a method for cold rolling and a cold rolling mill with a single stand which, despite changes in the strip thickness profile and higher strip speeds, have no problems with regard to the mass flow and / or the strip tension.
  • This object is achieved by a cold rolling mill with the features of claim 1 and by a method with the features of claim 3.
  • Advantageous further developments are described in the subclaims.
  • a strip store for mass flow control and / or strip tension control of the rolling process in particular for flexible rolling, be arranged between the upstream reel device and the individual stand for cold rolling.
  • the strip feeders arranged in front of the individual stand in the strip running direction compensate for the mass flow changes or strip speed changes caused by a change in the strip thickness or a change in the strip thickness profile during flexible rolling. This shows in particular the advantage that rolling with a changing strip thickness sequence is still possible even at higher rolling speeds.
  • the speed changes due to the change in the strip thickness in the roll gap are greatest on the entry side of the stand, so that the strip store is provided according to the invention at least in the entry area. Since the disturbances due to the change in the course of the strip thickness, i.e. In the case of a flexible roller, which also has - but not so strongly - an effect on the outlet-side belt speeds, it is proposed according to a preferred embodiment to also arrange a belt store on the outlet side of the individual stand.
  • the tape store is preferably a dancer role.
  • a dancer roll or a dancer roll arrangement comprises a roll which can be set at a certain angle with respect to the band and can be acted upon with a certain force, so that a loop is formed in the band, the loop length of which changes with the position of the roll. In this way, more or less tape can be stored.
  • a dancer roll in both the inlet and outlet area, which are advantageously identical in construction.
  • FIG. 1 shows a system layout of an embodiment of a cold rolling stand proposed according to the invention in flexible cold rolling, each with a dancer roll in the inlet and outlet areas;
  • Fig. 4 shows an overview of the strip thickness control loop in combination with the strip tension control and a compensation of the mass flow disturbances in flexible cold rolling with a single stand.
  • FIG. 1 An overview of a cold roll stand 1, each with a band store 2, 3 in the inlet (4) and in the outlet area (5), each comprising a dancer roll 6, 7, shows Fig. 1.
  • the coil 8 is wound using a Decoiler 9 decoiled and inserted into the roll stand 1 in the direction of the arrow. After passing through the individual stand 1, it is wound up by means of a second reel device 10.
  • a dancer roll 6, 7 is provided, which are identical in construction and are shown in detail in FIG. 2 with their employment.
  • the single roll stand 1 itself is composed of two support rolls 11, two intermediate rolls 12 and the work rolls 13, 14. Any other arrangement of rollers in a single stand can also be used.
  • Between the Roll stand 1 and the dancer rolls 6, 7 can, for example, also have a marking device 15 arranged in the belt line on the outlet side (5).
  • Fig. 2 shows the mechanics and the control of a dancer roll 6 in a flexible cold rolling.
  • a loop is formed in the band 8, the loop length of which changes with the position of the dancer roll 6 or its angular position in relation to the roll 16.
  • the exemplary embodiment shown shows a hydraulic adjustment 18 for the dancer roll 6.
  • a force regulator 19 is assigned to the dancer roll 6.
  • actual force values and actual angle values of the dancer roll 6 are tapped.
  • these actual force values are fed to force controller 19.
  • the target force values are not specified here, but are calculated from the tapped actual angle values and a specified target tension.
  • the force control circuit gives a force correction value to the position 18, here a hydraulic piston-cylinder unit, of the dancer roller 6. A correction of the tension of the belt is achieved via the force correction.
  • the actual angle value tapped at the dancer roll is also used to regulate the speed setting of the reel devices (9, 10) and thus to regulate the torque of the reel devices for mass flow control.
  • the actual angle value and a predetermined target angle are given to an angle controller.
  • An angle correction value is calculated depending on the result of the target / actual value comparison. This angle correction value is used to control the speed in the reel devices for mass flow control.
  • An overview of this strip tension and mass flow control by means of the dancer rollers 6, 7 in the inlet and outlet areas (4, 5) of a cold rolling mill 1 is shown in FIG. 3.
  • the belt tension control is based on the calculation of a target force for regulating the hydraulic adjustment of the dancer roller of the actual force, while the speed of the reel devices is regulated for mass flow control.
  • the belt speed is entered as the setpoint. This is also given as the setpoint for roller speed control.
  • the strip thickness control in flexible rolling is shown.
  • the change in the roll gap and thus a change in the strip thickness curve over the strip length is known.
  • a target strip thickness curve is thus specified.
  • This setpoint of the strip thickness curve is used to pre-control the entry-side dancer roll.
  • the change in the speed at which the strip enters the roll stand and the strip tension control required to maintain a constant strip tension are calculated from the target strip thickness curve. Due to the mass flow compensation, the inlet train can still be calmed down.
  • the values for the target strip thickness profile are given to a thickness controller, which uses the actual strip thickness values, which are tapped on the entry and exit sides, to calculate correction values for the strip thickness and to pass these correction values on to a position controller, which controls the gap setting in the cold rolling mill.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)

Abstract

The invention relates to a method for cold roll forming a metallic strip (8), a steel strip in particular, comprising a single frame (1), having means for adjusting a roll gap, a winding device (9) which is arranged upstream of the cold roll single frame for unwinding the strip (8), and a winding device (10) which is arranged downstream of the cold roll single frame (1) for winding the strip (8). The aim of the invention is to eliminate all problems connected to strip tension when the thickness of the strip varies and to increase the speed of the strip. To achieve this, a strip accumulator (2) is arranged between the upstream winding device (9) and the single frame (1) for controlling the mass flow and/or tension of the rolling process, particularly when flexible rollers are used.

Description

Kaltwalzwerk sowie Verfahren zum Kaltwalzen von metallischem BandCold rolling mill and method for cold rolling metallic strip

Die Erfindung betrifft ein Kaltwalzwerk sowie ein Verfahren zum Kaltwalzen von metallischem Band, insbesondere aus Stahl, mit einem Einzelgerust mit Mitteln zum Einstellen eines Walzspaltes sowie mit einer dem Kaltwalzgerüst vorgeordneten Haspeleinrichtung zum Abhaspeln des Bandes und mit einer dem Kaltwalzgerüst nachgeordneten Haspeleinrichtung zum Aufhaspeln des Ban- des.The invention relates to a cold rolling mill and a method for cold rolling metallic strip, in particular steel, with a single stand with means for adjusting a roll gap and with a reel device upstream of the cold rolling stand for uncoiling the strip and with a reel device downstream of the cold rolling stand for reeling the strip. of.

Beim bisher bekannten Kaltwalzen auf Einzelwalzgerüsten wird nur Eingangsband mit engen Dickentoleranzen verwendet, und die Banddickenabnahme wird über die Bandlänge konstant gehalten. Sofern diese Voraussetzungen nicht vorliegen, ist mit Problemen bezüglich sowie des Bandzuges zu rechnen, und die Bandgeschwindigkeit ist stark begrenzt.In the previously known cold rolling on single roll stands, only input strip with narrow thickness tolerances is used, and the strip thickness decrease is kept constant over the strip length. If these requirements are not met, problems with and tensioning of the belt can be expected, and the belt speed is severely limited.

Aus der WO 99/55474 ist ein Steckelwalzwerk zum Warmwalzen mit mindestens einem Reversierwalzgerüst sowie diesem vorgeordneten und nachgeord- neten Haspeln beschrieben. Zwischen den Haspeln und dem Reversierwalzgerüst ist jeweils ein Schiingenheber vorgesehen, die Istwerte für eine Zugregelung sowie eine Massenflußregelung liefert. Ein solches Steckelwalzwerk betrifft aber ein Warmwalzwerk und damit keinen Kaltwalzprozeß.WO 99/55474 describes a Steckel rolling mill for hot rolling with at least one reversing roll stand and upstream and downstream reels. A loop lifter is provided between the reels and the reversing roll stand, which provides actual values for tension control and mass flow control. However, such a Steckel rolling mill relates to a hot rolling mill and therefore not to a cold rolling process.

Ausgehend von aus der Kaltwalztechnik Bekanntem liegt der Erfindung die Aufgabe zugrunde, ein Verfahren zum Kaltwalzen sowie ein Kaltwalzwerk mit einem Einzelgerust bereitzustellen, die trotz Änderung des Banddickenverlaufs und größeren Bandgeschwindigkeiten keine Probleme bezüglich des Massenflusses und/oder des Bandzuges aufweisen. Diese Aufgabe wird durch ein Kaltwalzwerk mit den Merkmalen des Anspruchs 1 sowie durch ein Verfahren mit den Merkmalen des Anspruchs 3 gelöst. Vorteilhafte Weiterentwicklungen sind in den Unteransprüchen beschrieben.Starting from what is known from cold rolling technology, the object of the invention is to provide a method for cold rolling and a cold rolling mill with a single stand which, despite changes in the strip thickness profile and higher strip speeds, have no problems with regard to the mass flow and / or the strip tension. This object is achieved by a cold rolling mill with the features of claim 1 and by a method with the features of claim 3. Advantageous further developments are described in the subclaims.

Erfindungsgemäß wird vorgeschlagen, daß zwischen der vorgeordneten Has- peleinrichtung und dem Einzelgerust zum Kaltwalzen ein Bandspeicher für eine Massenflußregelung und/oder Bandzugregelung des Walzprozesses, insbesondere beim flexiblen Walzen, angeordnet ist.According to the invention, it is proposed that a strip store for mass flow control and / or strip tension control of the rolling process, in particular for flexible rolling, be arranged between the upstream reel device and the individual stand for cold rolling.

Durch den in Bandlaufrichtung vor dem Einzelgerust angeordneten Bandspei- eher werden die durch eine Änderung der Banddicke bzw. eine Änderung des Banddickenverlaufs beim flexiblen Walzen verursachten Massenflußänderun- gen bzw. Bandgeschwindigkeitsänderungen kompensiert. Dies zeigt insbesondere den Vorteil, daß ein Walzen mit sich ändernder Banddickenabfolge auch bei höheren Walzgeschwindigkeiten noch möglich ist.The strip feeders arranged in front of the individual stand in the strip running direction compensate for the mass flow changes or strip speed changes caused by a change in the strip thickness or a change in the strip thickness profile during flexible rolling. This shows in particular the advantage that rolling with a changing strip thickness sequence is still possible even at higher rolling speeds.

Die Geschwindigkeitsänderungen aufgrund der Änderung der Banddicke im Walzspalt sind auf der Einlaufseite des Einzelgerüstes am größten, so daß der Bandspeicher erfindungsgemäß wenigstens im Einlaufbereich vorgesehen ist. Da die Störungen aufgrund der Änderung des Banddickenverlaufs, d.h. bei ei- nem flexiblen Walzen, sich auch - allerdings nicht so stark - auf die auslaufsei- tigen Bandgeschwindigkeiten auswirken, wird nach einer bevorzugten Ausführungsform vorgeschlagen, auch auf der Auslaufseite des Einzelgerüstes einen Bandspeicher anzuordnen.The speed changes due to the change in the strip thickness in the roll gap are greatest on the entry side of the stand, so that the strip store is provided according to the invention at least in the entry area. Since the disturbances due to the change in the course of the strip thickness, i.e. In the case of a flexible roller, which also has - but not so strongly - an effect on the outlet-side belt speeds, it is proposed according to a preferred embodiment to also arrange a belt store on the outlet side of the individual stand.

Vorzugsweise handelt es sich bei dem Bandspeicher um eine Tänzerrolle. Eine Tänzerrolle bzw. eine Tänzerrollenanordnung umfaßt eine gegenüber dem Band in einem bestimmten Winkel anstellbare und mit einer bestimmten Kraft beaufschlagbare Rolle, so daß sich eine Schlinge im Band bildet, deren Schlingenlänge sich mit der Position der Rolle verändert. Auf diese Weise kann mehr oder weniger Band gespeichert werden. Nach einer bevorzugten Ausführungs- form befindet sich sowohl im Einlauf- als auch im Auslaufbereich eine Tänzerrolle, die vorteilhafterweise baugleich sind.The tape store is preferably a dancer role. A dancer roll or a dancer roll arrangement comprises a roll which can be set at a certain angle with respect to the band and can be acted upon with a certain force, so that a loop is formed in the band, the loop length of which changes with the position of the roll. In this way, more or less tape can be stored. According to a preferred embodiment form there is a dancer roll in both the inlet and outlet area, which are advantageously identical in construction.

Das vorgeschlagene Verfahren wird detailliert mit Hilfe der nachfolgenden Figuren beschrieben, wobei die einzelnen Fig. zeigen:The proposed method is described in detail with the aid of the following figures, the individual figures showing:

Fig. 1 ein Anlagenlayout einer Ausführungsform eines erfindungsgemäß vorgeschlagenen Kaltwalzgerüstes beim flexiblen Kaltwalzen mit je einer Tänzerrolle im Einlauf- und im Auslauf bereich;1 shows a system layout of an embodiment of a cold rolling stand proposed according to the invention in flexible cold rolling, each with a dancer roll in the inlet and outlet areas;

Fig. 2 eine detaillierte Ansicht der Tänzerrolle sowie eine bevorzugte Ausführungsform der Anstellung und Regelung;2 shows a detailed view of the dancer roll and a preferred embodiment of the employment and regulation;

Fig. 3 eine Übersicht der Bandzug- und Massenflußregelkreise beim flexiblen Kaltwalzen mit einem Einzelgerust;3 shows an overview of the strip tension and mass flow control loops in flexible cold rolling with a single stand.

Fig. 4 eine Übersicht des Banddickenregelkreises in Kombination mit der Bandzugregelung sowie einer Kompensation der Massenflußstörungen beim flexiblen Kaltwalzen mit einem Einzelgerust.Fig. 4 shows an overview of the strip thickness control loop in combination with the strip tension control and a compensation of the mass flow disturbances in flexible cold rolling with a single stand.

Einen Überblick über ein Kaltwalzeinzelgerüst 1 mit je einem Bandspeicher 2, 3 im Einlauf- (4) und im Auslauf bereich (5), der je eine Tänzerrolle 6, 7 umfaßt, zeigt die Fig. 1. Das aufgecoilte Band 8 wird mit Hilfe einer Haspeleinrichtung 9 enthaspelt und in das Walzgerüst 1 in Pfeilrichtung eingeführt. Nach Durchlau- fen des Einzelgerüstes 1 wird es mittels einer zweiten Haspeleinrichtung 10 aufgehaspelt. Jeweils im Einlaufbereich (4) und im Auslaufbereich (5) ist eine Tänzerrolle 6, 7 vorgesehen, die baugleich sind und in Fig. 2 im Detail mit ihrer Anstellung dargestellt sind. Das Einzelwalzgerüst 1 selbst setzt sich bei der gezeigten Ausführungsform aus zwei Stützwalzen 11 , zwei Zwischenwalzen 12 und den Arbeitswalzen 13, 14 zusammen. Jede andere Anordnung von Walzen in einem Einzelgerust kann ebenfalls zur Anwendung kommen. Zwischen dem Walzgerüst 1 und den Tänzerrollen 6, 7 kann beispielsweise auf der Auslaufseite (5) noch eine Markiervorrichtung 15 in der Bandlinie angeordnet sein.An overview of a cold roll stand 1, each with a band store 2, 3 in the inlet (4) and in the outlet area (5), each comprising a dancer roll 6, 7, shows Fig. 1. The coil 8 is wound using a Decoiler 9 decoiled and inserted into the roll stand 1 in the direction of the arrow. After passing through the individual stand 1, it is wound up by means of a second reel device 10. In each case in the inlet area (4) and in the outlet area (5) a dancer roll 6, 7 is provided, which are identical in construction and are shown in detail in FIG. 2 with their employment. In the embodiment shown, the single roll stand 1 itself is composed of two support rolls 11, two intermediate rolls 12 and the work rolls 13, 14. Any other arrangement of rollers in a single stand can also be used. Between the Roll stand 1 and the dancer rolls 6, 7 can, for example, also have a marking device 15 arranged in the belt line on the outlet side (5).

Fig. 2 zeigt die Mechanik und die Regelung einer Tänzerrolle 6 bei einem flexiblen Kaltwalzen. Mit Hilfe der Anstellung der Tänzerrolle zum Band 8 im Ver- hältnis zu zwei benachbarten Rollen 16, 17 wird eine Schlinge im Band 8 gebildet, deren Schlingenlänge sich mit der Position der Tänzerrolle 6 bzw. deren Winkelanstellung im Verhältnis zu der Rolle 16 verändert. Je tiefer die Tänzerrolle 6 in das Band 8 eintaucht, desto mehr Band kann gespeichert werden. Das gezeigte Ausführungsbeispiel zeigt eine hydraulische Anstellung 18 für die Tän- zerrolle 6.Fig. 2 shows the mechanics and the control of a dancer roll 6 in a flexible cold rolling. With the aid of the position of the dancer roll relative to the band 8 in relation to two adjacent rolls 16, 17, a loop is formed in the band 8, the loop length of which changes with the position of the dancer roll 6 or its angular position in relation to the roll 16. The deeper the dancer roll 6 dips into the band 8, the more band can be stored. The exemplary embodiment shown shows a hydraulic adjustment 18 for the dancer roll 6.

Der Tänzerrolle 6 ist ein Kraftregler 19 zugeordnet. Für die Regelung werden Istkraft-Werte sowie Istwinkel-Werte der Anstellung der Tänzerrolle 6 abgegriffen. Diese Istkraft-Werte werden neben Sollkraft-Werten dem Kraftregler 19 zugeführt. Hierbei werden die Sollkraft-Werte nicht vorgegeben, sondern aus den abgegriffenen Istwinkel-Werten und einem vorgegebenen Sollzug berechnet. Der Kraftregelkreis gibt als Ergebnis des Vergleichs der Soll-Istkraft-Werte einen Kraftkorrekturwert auf die Anstellung 18, hier eine hydraulische Kolben- Zylinder-Einheit, der Tänzerrolle 6. Über die Kraftkorrektur wird eine Korrektur der Zugspannung des Bandes erreicht.A force regulator 19 is assigned to the dancer roll 6. For the control, actual force values and actual angle values of the dancer roll 6 are tapped. In addition to target force values, these actual force values are fed to force controller 19. The target force values are not specified here, but are calculated from the tapped actual angle values and a specified target tension. As a result of the comparison of the target-actual force values, the force control circuit gives a force correction value to the position 18, here a hydraulic piston-cylinder unit, of the dancer roller 6. A correction of the tension of the belt is achieved via the force correction.

Der an der Tänzerrolle abgegriffene Istwinkel-Wert wird ebenso für die Regelung der Drehzahleinstellung der Haspeleinrichtungen (9, 10) und damit über die Drehmomentenregelung der Haspeleinrichtungen für die Massenflußrege- lung verwendet. Hierzu wird einem Winkelregler der Istwinkel-Wert sowie ein vorgegebener Sollwinkel aufgegeben. In Abhängigkeit des Ergebnisses des Soll-Istwertvergleiches wird ein Winkelkorrekturwert berechnet. Dieser Winkelkorrekturwert dient zur Regelung der Drehzahl in den Haspeleinrichtungen zur Massenflußregelung. Eine Übersicht über diese Bandzug- und Massenflußregelung mittels der Tänzerrollen 6, 7 im Einlauf- und im Auslaufbereich (4, 5) eines Kaltwalzgerüstes 1 zeigt Fig. 3. Die Bandzugregelung erfolgt durch die Berechnung einer Sollkraft zur Regelung der hydraulischen Anstellung der Tänzerrolle, ausgehend von der Istkraft, während zur Massenflußregelung eine Regelung der Drehzahl der Haspeleinrichtungen stattfindet.The actual angle value tapped at the dancer roll is also used to regulate the speed setting of the reel devices (9, 10) and thus to regulate the torque of the reel devices for mass flow control. For this purpose, the actual angle value and a predetermined target angle are given to an angle controller. An angle correction value is calculated depending on the result of the target / actual value comparison. This angle correction value is used to control the speed in the reel devices for mass flow control. An overview of this strip tension and mass flow control by means of the dancer rollers 6, 7 in the inlet and outlet areas (4, 5) of a cold rolling mill 1 is shown in FIG. 3. The belt tension control is based on the calculation of a target force for regulating the hydraulic adjustment of the dancer roller of the actual force, while the speed of the reel devices is regulated for mass flow control.

In den Regelkreis der Haspeldrehzahl, d.h. der Abhaspei- bzw. der Aufhaspeldrehzahl, geht als Sollwert die Bandgeschwindigkeit ein. Diese wird ebenfalls bei der Walzendrehzahlregelung als Sollwert aufgegeben.In the control loop of the reel speed, i.e. the take-up or take-up speed, the belt speed is entered as the setpoint. This is also given as the setpoint for roller speed control.

Mit Hilfe der Fig. 4 wird die Banddickenregelung bei dem flexiblen Walzen dargestellt. Bei einem flexiblen Walzprozeß ist die Änderung des Walzspaltes und damit eine Änderung des Banddickenverlaufs über die Bandlänge bekannt. Es ist damit ein Soll-Banddickenverlauf vorgegeben. Dieser Sollwert des Banddik- kenverlaufs wird zur Vorsteuerung der einlaufseitigen Tänzerrolle genutzt. Aus dem Soll-Banddickenverlauf wird die Änderung der Einlaufgeschwindigkeit des Bandes in das Walzgerüst berechnet sowie die hierfür notwendige Bandzugregelung zur Aufrechterhaltung eines konstanten Bandzugs. Aufgrund der Mas- senflußkompensation kann der Einlaufzug weiterhin beruhigt werden. Zusätzlich werden die Werte für den Soll-Banddickenverlauf einem Dickenregler aufgegeben, der mit Hilfe von Ist-Banddickenwerten, die einlauf- und auslaufseitig abgegriffen werden, Korrekturwerte für die Banddicke berechnet und diese Korrekturwerte an einen Positionsregler weitergibt, der die Walzspalteinstellung im Kaltwalzgerüst regelt. 4, the strip thickness control in flexible rolling is shown. In a flexible rolling process, the change in the roll gap and thus a change in the strip thickness curve over the strip length is known. A target strip thickness curve is thus specified. This setpoint of the strip thickness curve is used to pre-control the entry-side dancer roll. The change in the speed at which the strip enters the roll stand and the strip tension control required to maintain a constant strip tension are calculated from the target strip thickness curve. Due to the mass flow compensation, the inlet train can still be calmed down. In addition, the values for the target strip thickness profile are given to a thickness controller, which uses the actual strip thickness values, which are tapped on the entry and exit sides, to calculate correction values for the strip thickness and to pass these correction values on to a position controller, which controls the gap setting in the cold rolling mill.

Claims

Patentansprüche: claims: 1. Kaltwalzwerk zum Kaltwalzen von metallischem Band (8), insbesondere aus Stahl, mit einem Einzelgerust (1) mit Mitteln zum Einstellen eines1. Cold rolling mill for cold rolling metallic strip (8), in particular made of steel, with a single stand (1) with means for adjusting a Walzspaltes sowie mit einer dem Kaltwalzeinzelgerüst vorgeordneten Haspeleinrichtung (9) zum Abhaspeln des Bandes (8) und mit einer dem Kaltwalzeinzelgerüst (1) nachgeordneten Haspeleinrichtung (10) zum Aufhaspeln des Bandes (8), dadurch gekennzeichnet, daß zwischen der vorgeordneten Haspeleinrichtung (9) und dem Einzelgerust (1) ein Bandspeicher (2) für eine Massenflußregelung und/oder Bandzugregelung des Walzprozesses, insbesondere beim flexiblen Walzen, angeordnet ist.Roll gap as well as with a reel device (9) upstream of the cold roll individual stand for uncoiling the strip (8) and with a reel device (10) downstream of the cold roll single stand (1) for reeling up the strip (8), characterized in that between the upstream reel device (9) and a strip store (2) for mass flow control and / or strip tension control of the rolling process, in particular for flexible rolling, is arranged in the individual stand (1). 2. Kaltwalzwerk nach Anspruch 1 , dadurch gekennzeichnet, daß zusätzlich zu dem ersten, zwischen der vorgeordneten Haspeleinrichtung (9) und dem Einzelgerust (1) angeordneten, Bandspeicher (2) ein zweiter Bandspeicher (3) zwischen dem Einzelgerust (1) und der nachgeordneten Haspeleinrichtung (10) angeordnet ist.2. Cold rolling mill according to claim 1, characterized in that in addition to the first, arranged between the upstream reel device (9) and the individual stand (1), strip storage (2), a second strip store (3) between the individual stand (1) and the downstream Reel device (10) is arranged. 3. Verfahren zum Kaltwalzen eines metallischen Bandes (8), insbesondere aus Stahl, in einem Kaltwalzwerk mit einem Einzelgerust (1) mit Mitteln zum Einstellen eines Walzspaltes zum Kaltwalzen des Bandes sowie mit einer dem Einzelgerust (1 ) vorgeordnete Haspeleinrichtung (9) zum Abhaspeln des Bandes (8) und mit einer dem Einzelgerust (1 ) nachgeordneten Haspeleinrichtung (10) zum Aufhaspeln des Bandes (8), dadurch gekennzeichnet, daß mittels des Einzelgerüstes (1 ) ein Walzen, insbesondere ein flexibles3. Method for cold rolling a metallic strip (8), in particular made of steel, in a cold rolling mill with a single stand (1) with means for adjusting a roll gap for cold rolling the strip and with a reel device (9) arranged in front of the stand (1) for unwinding of the strip (8) and with a reel device (10) arranged downstream of the individual stand (1) for reeling the strip (8), characterized in that the individual stand (1) is used for rolling, in particular flexible Walzen, durchgeführt wird, bei dem die Banddicke während des Walzens ständig nach einer bestimmten Vorgabe geändert wird, und daß mittels eines Bandspeichers (2), der zwischen der vorgeordneten Haspeleinrichtung (9) und dem Einzelgerust (1) angeordnet ist, eine Massenflußregelung und/oder eine Bandzugregelung des Walzprozesses stattfindet.Rolling is carried out at the strip thickness during rolling is constantly changed according to a specific specification, and that a mass flow control and / or a strip tension control of the rolling process takes place by means of a strip store (2), which is arranged between the upstream reel device (9) and the individual stand (1). 4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die Haspeleinrichtungen (9, 10) drehzahlgeregelt sind.4. The method according to claim 3, characterized in that the reel devices (9, 10) are speed-controlled. 5. Verfahren nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß in einem Regelkreis für die Regelung der Anstellung des Bandspeichers (2, 3), insbesondere einer Tänzerrolle (6, 7), ein mittels eines Kraftreglers berechneter Kraftkorrektur-Wert aus einem an der Anstellungs- einheit (18) abgegriffenen Istkraft-Wert und einem Sollkraft-Wert ermittelt wird, wobei der Sollkraft-Wert aus dem an der Tänzerrolle abgegriffenen Istwinkel-Wert und einem vorgegebenen Sollzug-Wert berechnet wird.5. The method according to claim 3 or 4, characterized in that in a control circuit for regulating the employment of the tape store (2, 3), in particular a dancer roll (6, 7), a force correction value calculated by means of a force controller from one of the Adjustment unit (18) tapped actual force value and a target force value is determined, the target force value being calculated from the actual angle value tapped at the dancer roll and a predetermined target tension value. Verfahren nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß der Bandspeicher (2, 3) in Abhängigkeit der bekannten Änderung des Banddickenverlaufs vorgesteuert wird. Method according to one of Claims 3 to 5, characterized in that the strip store (2, 3) is precontrolled as a function of the known change in the strip thickness curve.
PCT/EP2002/007689 2001-07-11 2002-07-10 Cold rolling mill and method for cold roll forming a metallic strip Ceased WO2003008122A1 (en)

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US10/483,706 US20040177666A1 (en) 2001-07-11 2002-07-10 Cold rolling mill and method for cold roll forming a metallic strip
BR0209768-0A BR0209768A (en) 2001-07-11 2002-07-10 Cold Rolling Mill as well as Cold Rolling Procedure
DE50202231T DE50202231D1 (en) 2001-07-11 2002-07-10 KALTWALZERK AND METHOD FOR COLD ROLLING OF METALLIC TAPE
JP2003513719A JP2005500163A (en) 2001-07-11 2002-07-10 Cold rolling mill and method for cold rolling metal strips
AT02767196T ATE288798T1 (en) 2001-07-11 2002-07-10 COLD ROLLER AND METHOD FOR COLD ROLLING METALLIC STRIP
EP02767196A EP1406735B1 (en) 2001-07-11 2002-07-10 Cold rolling mill and method for cold roll forming a metallic strip
CA002453297A CA2453297A1 (en) 2001-07-11 2002-07-10 Cold rolling mill and method of cold rolling metal strip
KR10-2003-7015711A KR20040014541A (en) 2001-07-11 2002-07-10 Cold rolling mill and method for cold roll forming a metallic strip

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DE10133756A DE10133756A1 (en) 2001-07-11 2001-07-11 Cold rolling mill and method for cold rolling metallic strip

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CA2453297A1 (en) 2003-01-30
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EP1406735A1 (en) 2004-04-14
TW587965B (en) 2004-05-21

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