EP1406735B1 - 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
EP1406735B1
EP1406735B1 EP02767196A EP02767196A EP1406735B1 EP 1406735 B1 EP1406735 B1 EP 1406735B1 EP 02767196 A EP02767196 A EP 02767196A EP 02767196 A EP02767196 A EP 02767196A EP 1406735 B1 EP1406735 B1 EP 1406735B1
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EP
European Patent Office
Prior art keywords
strip
rolling
cold rolling
cold
roll
Prior art date
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Revoked
Application number
EP02767196A
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German (de)
French (fr)
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EP1406735A1 (en
Inventor
Udo Brockes
Olaf Norman Jepsen
Michael Zielenbach
Manfred Stachuletz
Angela STACHULETZ-KÜHBACHER
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SMS Siemag AG
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SMS Demag 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
    • B21B37/48—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, according to the preambles of claims 1 and 3, a cold rolling mill and a method for cold rolling of metallic band, in particular of steel, with a single framework with means for setting a roll gap and with a cold rolling mill upstream Reel device for unwinding the tape and with a the Cold rolling mill downstream reel device for reeling the tape (See, for example, DE-A 4243045).
  • WO 99/55474 is a Steckel mill for hot rolling with at least a Reversierwalzgerüst and this upstream and downstream Reels described. Between the reels and the reversing roll stand in each case a loop lifter is provided, the actual values for a tension control as well as providing mass flow control.
  • a Stecketwalzwerk concerns but a hot rolling mill and thus no cold rolling process.
  • Patent Abstracts of Japan & JP 60 231516 A relates to hot rolling and here in particular the formation of a reel device after a Fenjgwatz No.
  • DE 42 43 045 A describes a cold rolling mill and a scheme for this. This includes a unwinding reel, two stands and a rewinding Reel. To achieve a constant tape thickness over the tape length, should the rolling force in dependence of the reduction in pre-calculated size kept constant. For this purpose, the rolling force of each rolling stand, the Roller speed and the belt tension matched. The belt speed between unwinding reel and the first rolling mill is influenced in such a way that the mass flow through the rolling mill per unit time is constant.
  • the invention has the object based, a method for cold rolling and a cold rolling mill with a To provide a single framework, despite changing the band thickness profile and larger tape speeds no mass flow problems and / or the strip draw.
  • the speed changes due to the change of the tape thickness in the Roll gap are largest on the inlet side of the single scaffold, so that the Tape storage is provided according to the invention at least in the inlet region. Since the disturbances due to the change in the band thickness profile, i. at a flexible rollers, also - but not so strong - on the outlet side Acting tape speeds is, according to a preferred embodiment proposed, also on the outlet side of the single scaffold one To arrange tape storage.
  • the tape storage is a dancer roll.
  • a Dancer roll or a dancer roll arrangement comprises one opposite the Band adjustable at a certain angle and with a certain force acted upon role, so that a loop forms in the band whose loop length changes with the position of the roll. That way, more can be done or less tape can be stored.
  • FIG. 1 shows the coiled-up belt 8 with the aid of a reeling device 9 de-reeled and introduced into the rolling stand 1 in the arrow direction.
  • a second reel device 10th coiled.
  • a Dancer roller 6, 7 provided, which are identical and in Fig. 2 in detail with their Employment are shown.
  • the single rolling mill 1 itself sits down in the shown Embodiment of two support rollers 11, two intermediate rollers 12th and the work rolls 13, 14 together. Any other arrangement of rollers in a single framework can also be used. Between the Roll stand 1 and the dancer rolls 6, 7 can, for example, on the outlet side (5) nor a marking device 15 may be arranged in the band line.
  • Fig. 2 shows the mechanics and the regulation of a dancer roll 6 in a flexible Cold rolling.
  • the dancer roll With the help of the employment of the dancer roll to the band 8 in the relationship to two adjacent rollers 16, 17, a loop is formed in the band 8, whose loop length is consistent with the position of the dancer roller 6 or their Angular adjustment in relation to the roller 16 changed. The deeper the dancer roll 6 dips into the band 8, the more band can be stored.
  • the embodiment shown shows a hydraulic adjustment 18 for the dancer roll 6th
  • the dancer roll 6 is associated with a force regulator 19.
  • a force regulator 19 For the scheme will be Istkraft values and actual angle values of employment of the dancer roller 6 tapped. These actual force values are next to desired force values the force controller 19th fed. In this case, the desired force values are not specified, but off the tapped actual angle values and a predetermined Sollzug calculated.
  • the force control loop gives the target actual force values as a result of the comparison a force correction value on the position 18, here a hydraulic piston-cylinder unit, the dancer roll 6. Over the force correction becomes a correction reached the tension of the tape.
  • the tapped on the dancer roll actual angle value is also for the scheme the speed adjustment of the reels (9, 10) and thus about the torque control of the reels for mass flow control used.
  • an angle controller For this purpose, an angle controller, the actual angle value and a given predetermined target angle.
  • an angle correction value is calculated. This angle correction value is used to control the speed in the reels for Mass flow control.
  • FIG. 3 shows the strip tension regulation by calculating a setpoint force for controlling the hydraulic adjustment of the dancer roller, starting from the Istkraft, while for mass flow control of the speed of the Reels takes place.
  • the belt speed is entered as the setpoint. This one will too in the roller speed control as a setpoint.
  • the band thickness control is shown in the flexible rollers.
  • a flexible rolling process is the change of the roll gap and thus a change in the band thickness profile over the tape length known. It is thus predetermined a desired strip thickness course.
  • This setpoint of the band thickness curve is used for feedforward control of the inlet side dancer roll.
  • Out the desired band thickness curve is the change in the inlet velocity of Bandes calculated in the rolling stand and the necessary band tension control to maintain a constant strip tension. Due to the mass flow compensation the entry train can still be calmed down.
  • the values for the desired strip thickness profile are given to a thickness controller, with the aid of actual strip thickness values, which are tapped on the inlet and outlet side be calculated, correction values for the strip thickness and these correction values passes on to a position controller, the roll gap setting in Cold rolling mill regulates.

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 fame (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

Die Erfindung betrifft, nach den Oberbegriffen der Ansprüche 1 bzw. 3, ein Kaltwalzwerk sowie ein Verfahren zum Kaltwalzen von metallischem Band, insbesondere aus Stahl, mit einem Einzelgerüst 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 Bandes (siehe z.B. DE-A 4243045).The invention relates, according to the preambles of claims 1 and 3, a cold rolling mill and a method for cold rolling of metallic band, in particular of steel, with a single framework with means for setting a roll gap and with a cold rolling mill upstream Reel device for unwinding the tape and with a the Cold rolling mill downstream reel device for reeling the tape (See, for example, DE-A 4243045).

Beim bisher bekannten Kaltwalzen auf Einzelwatzgerüsten wird nur Eingangsband mit engen Dickentoleranzen verwendet, und die Banddickenabnahme wird über die Bandlänge konstant gehalten. Sofem 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 scaffold stands only input band used with tight thickness tolerances, and the strip thickness decreases kept constant over the tape length. Sofem not these requirements be present, is expected to problems with respect to the tape and, and the tape speed is very limited.

Aus der WO 99/55474 ist ein Steckelwalzwerk zum Warmwalzen mit mindestens einem Reversierwalzgerüst sowie diesem vorgeordneten und nachgeordneten Haspeln beschrieben. Zwischen den Haspeln und dem Reversierwalzgerüst ist jeweils ein Schlingenheber vorgesehen, die Istwerte für eine Zugregelung sowie eine Massenflußregelung liefert. Ein solches Stecketwalzwerk betrifft aber ein Warmwalzwerk und damit keinen Kaltwalzprozeß.From WO 99/55474 is a Steckel mill for hot rolling with at least a Reversierwalzgerüst and this upstream and downstream Reels described. Between the reels and the reversing roll stand in each case a loop lifter is provided, the actual values for a tension control as well as providing mass flow control. Such a Stecketwalzwerk concerns but a hot rolling mill and thus no cold rolling process.

Patent Abstracts of Japan & JP 60 231516 A betrifft das Warmwalzen und hier insbesondere die Ausbildung einer Haspeleinrichtung nach einer Fenjgwatzstraße. Um den Bandzug für das Aufhaspeln einzustellen, werden in Bandlaufrichtung vor der Haspeleinrichtung Looperrollen angeordnet sind.Patent Abstracts of Japan & JP 60 231516 A relates to hot rolling and here in particular the formation of a reel device after a Fenjgwatzstraße. To adjust the tape tension for rewinding, in the direction of tape travel before the reel means looper rollers are arranged.

Die DE 42 43 045 A beschreibt ein Kaltwalzwerk und eine Regelung hierfür. Dieses umfasst einen abwickelnden Haspel, zwei Walzgerüste sowie einen aufwickelnden Haspel. Um eine konstante Banddicke über die Bandlänge zu erreichen, soll die Walzkraft in Abhängigkeit der Stichabnahme in vorausberechneter Größe konstant gehalten werden. Hierzu werden die Walzkraft jedes Walzgerüstes, die Walzengeschwindigkeit und der Bandzug abgestimmt. Die Bandgeschwindigkeit zwischen abwickelndem Haspel und dem ersten Walzgerüst wird derart beeinflußt, daß der Massenfluß durch das Walzwerk je Zeiteinheit konstant ist.DE 42 43 045 A describes a cold rolling mill and a scheme for this. This includes a unwinding reel, two stands and a rewinding Reel. To achieve a constant tape thickness over the tape length, should the rolling force in dependence of the reduction in pre-calculated size kept constant. For this purpose, the rolling force of each rolling stand, the Roller speed and the belt tension matched. The belt speed between unwinding reel and the first rolling mill is influenced in such a way that the mass flow through the rolling mill per unit time is constant.

Ausgehend von aus der Kaltwalztechnik Bekanntem liegt der Erfindung die Aufgabe zugrunde, ein Verfahren zum Kaltwalzen sowie ein Kaltwalzwerk mit einem Einzelgerüst bereitzustellen, die trotz Änderung des Banddickenverlaufs und größeren Bandgeschwindigkeiten keine Probleme bezüglich des Massenflusses und/oder des Bandzuges aufweisen. Starting from known from the cold rolling technique known, the invention has the object based, a method for cold rolling and a cold rolling mill with a To provide a single framework, despite changing the band thickness profile and larger tape speeds no mass flow problems and / or the strip draw.

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.This object is achieved by a cold rolling mill having the features of the claim 1 and solved by a method having the features of claim 3. advantageous Further developments are described in the subclaims.

Erfindungsgemäß wird vorgeschlagen, daß zwischen der vorgeordneten Haspeleinrichtung und dem Einzelgerüst 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 between the upstream reel device and the single stand for cold rolling a tape storage for a Mass flow control and / or Bandzugregelung the rolling process, in particular during flexible rolling, is arranged.

Durch den in Bandlaufrichtung vor dem Einzelgerüst angeordneten Bandspeicher werden die durch eine Änderung der Banddicke bzw. eine Änderung des Banddickenverlaufs beim flexiblen Walzen verursachten Massenflußänderungen bzw. Bandgeschwindigkeitsänderungen kompensiert. Dies zeigt insbesondere den Vorteil, daß ein Walzen mit sich ändernder Banddickenabfolge auch bei höheren Watzgeschwindigkeiten noch möglich ist.By arranged in the tape running direction in front of the single frame tape storage be by a change in the strip thickness or a change of the Banddickenverlaufs during flexible rolling caused mass flow changes or belt speed changes compensated. This shows in particular the advantage that a rolling with changing band thickness sequence also is still possible at higher Watzgeschwindigkeiten.

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 einem flexiblen Walzen, sich auch ― allerdings nicht so stark ― auf die auslaufseitigen Bandgeschwindigkeiten auswirken, wird nach einer bevorzugten Ausführungsform vorgeschlagen, auch auf der Auslaufseite des Einzelgerüstes einen Bandspeicher anzuordnen.The speed changes due to the change of the tape thickness in the Roll gap are largest on the inlet side of the single scaffold, so that the Tape storage is provided according to the invention at least in the inlet region. Since the disturbances due to the change in the band thickness profile, i. at a flexible rollers, also - but not so strong - on the outlet side Acting tape speeds is, according to a preferred embodiment proposed, also on the outlet side of the single scaffold one To arrange tape storage.

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 Ausführungsform befindet sich sowohl im Einlauf- als auch im Auslaufbereich eine Tänzerrolle, die vorteilhafterweise baugleich sind.Preferably, the tape storage is a dancer roll. A Dancer roll or a dancer roll arrangement comprises one opposite the Band adjustable at a certain angle and with a certain force acted upon role, so that a loop forms in the band whose loop length changes with the position of the roll. That way, more can be done or less tape can be stored. According to a preferred embodiment there is a dancer roll in both the entry and the exit area, which are advantageously identical.

Das vorgeschlagene Verfahren wird detailliert mit Hilfe der nachfolgenden Figuren beschrieben, wobei die einzelnen Fig. zeigen:

Fig. 1
ein Anlagenlayout einer Ausführungsform eines erfindungsgemäß vorgeschlagenen Kaliwafzgerüstes beim flexiblen Kaltwalzen mit je einer Tänzerrolle im Einlauf- und im Auslaufbereich;
Fig. 2
eine detaillierte Ansicht der Tänzerrolle sowie eine bevorzugte Ausführungsform der Anstellung und Regelung;
Fig. 3
eine Übersicht der Bandzug- und Massenflußregelkreise beim flexiblen Kaltwalzen mit einem Einzelgerüst;
Fig. 4
eine Übersicht des Banddickenregelkreises in Kombination mit der Bandzugregelung sowie einer Kompensation der Massenflußstörungen beim flexiblen Kaltwalzen mit einem Einzelgerüst.
The proposed method will be described in detail with the aid of the following figures, wherein the individual figures show:
Fig. 1
a plant layout of an embodiment of a Kaliwafzgerüstes proposed in accordance with the invention in flexible cold rolling, each with a dancer roll in the inlet and outlet area;
Fig. 2
a detailed view of the dancer roll and a preferred embodiment of the employment and regulation;
Fig. 3
an overview of the Bandzug- and Massenflußregelkreise the flexible cold rolling with a single scaffold;
Fig. 4
an overview of the belt thickness control loop in combination with the band tension control and a compensation of Massenflußstörungen 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 Auslaufbereich (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 Durchlaufen 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 Einzelgerüst 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 single frame 1, each with a tape storage 2, 3 in the inlet (4) and in the outlet area (5), each comprising a dancer roller 6, 7, FIG. 1 shows the coiled-up belt 8 with the aid of a reeling device 9 de-reeled and introduced into the rolling stand 1 in the arrow direction. After going through of the single scaffold 1, it is by means of a second reel device 10th coiled. In each case in the inlet region (4) and in the outlet region (5) is a Dancer roller 6, 7 provided, which are identical and in Fig. 2 in detail with their Employment are shown. The single rolling mill 1 itself sits down in the shown Embodiment of two support rollers 11, two intermediate rollers 12th and the work rolls 13, 14 together. Any other arrangement of rollers in a single framework can also be used. Between the Roll stand 1 and the dancer rolls 6, 7 can, for example, on the outlet side (5) nor a marking device 15 may be arranged in the band line.

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 Verhältnis 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 Tänzerrolle 6.Fig. 2 shows the mechanics and the regulation of a dancer roll 6 in a flexible Cold rolling. With the help of the employment of the dancer roll to the band 8 in the relationship to two adjacent rollers 16, 17, a loop is formed in the band 8, whose loop length is consistent with the position of the dancer roller 6 or their Angular adjustment in relation to the roller 16 changed. The deeper the dancer roll 6 dips into the band 8, the more band can be stored. The embodiment shown shows a hydraulic adjustment 18 for the dancer roll 6th

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, sondem 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.The dancer roll 6 is associated with a force regulator 19. For the scheme will be Istkraft values and actual angle values of employment of the dancer roller 6 tapped. These actual force values are next to desired force values the force controller 19th fed. In this case, the desired force values are not specified, but off the tapped actual angle values and a predetermined Sollzug calculated. The force control loop gives the target actual force values as a result of the comparison a force correction value on the position 18, here a hydraulic piston-cylinder unit, the dancer roll 6. Over the force correction becomes a correction reached the tension of the tape.

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 Massenflußregelung 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. The tapped on the dancer roll actual angle value is also for the scheme the speed adjustment of the reels (9, 10) and thus about the torque control of the reels for mass flow control used. For this purpose, an angle controller, the actual angle value and a given predetermined target angle. Depending on the result of the Setpoint-actual value comparison, an angle correction value is calculated. This angle correction value is used to control the speed in the reels for Mass flow control.

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.An overview of this Bandzug- and mass flow control by means of dancers 6, 7 in the inlet and outlet areas (4, 5) of a cold rolling stand 1 FIG. 3 shows the strip tension regulation by calculating a setpoint force for controlling the hydraulic adjustment of the dancer roller, starting from the Istkraft, while for mass flow control of the speed of the Reels takes place.

In den Regelkreis der Haspeldrehzahl, d.h. der Abhaspel- bzw. der Aufhaspeldrehzahl, geht als Sollwert die Bandgeschwindigkeit ein. Diese wird ebenfalls bei der Walzendrehzahlregelung als Sollwert aufgegeben.In the loop of the reel speed, i. the uncoiling or Aufhaspeldrehzahl, the belt speed is entered as the setpoint. This one will too in the roller speed control as a setpoint.

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 Banddikkenverlaufs 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 Massenflußkompensation 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 band thickness control is shown in the flexible rollers. In a flexible rolling process is the change of the roll gap and thus a change in the band thickness profile over the tape length known. It is thus predetermined a desired strip thickness course. This setpoint of the band thickness curve is used for feedforward control of the inlet side dancer roll. Out the desired band thickness curve is the change in the inlet velocity of Bandes calculated in the rolling stand and the necessary band tension control to maintain a constant strip tension. Due to the mass flow compensation the entry train can still be calmed down. additionally the values for the desired strip thickness profile are given to a thickness controller, with the aid of actual strip thickness values, which are tapped on the inlet and outlet side be calculated, correction values for the strip thickness and these correction values passes on to a position controller, the roll gap setting in Cold rolling mill regulates.

Claims (6)

  1. Cold rolling mill for cold rolling of metallic strip (8), particularly of steel, with a roll stand (1) with means for setting a rolling gap as well as with a reeling device (9), which is arranged upstream of the cold roll stand, for unreeling the strip (8) and with a reeling device (10), which is arranged downstream of the cold roll stand (1), for reeling-up the strip (8), characterised in that a strip store (2) for mass flow regulation and a strip tension regulation of the rolling process, particularly in the case of flexible rolls, is arranged between the upstream reeling device (9) and the roll single stand (1).
  2. Cold rolling mill according to claim 1, characterised in that in addition to the first strip store (2) arranged between the upstream reeling device (9) and the single stand (1) a second strip store (3) is arranged between the single stand (1) and the downstream reeling device (10).
  3. Method of cold rolling a metallic strip (8), particularly of steel, in a cold rolling mill with a roll stand (1) with means for setting a rolling gap for cold rolling of the strip as well as with a reeling device (9), which is arranged upstream of the roll stand (1), for unreeling the strip (8) and with a reeling device (10), which is arranged downstream of the roll stand (1), for reeling-up the strip (8), characterised in that a rolling, particularly a flexible rolling, is carried out by means of the roll single stand (1) in which the strip thickness is constantly changed in accordance with a specific preset during the rolling and that by means of a strip store (2) arranged between the upstream reeling device (9) and the single stand (1) a mass flow regulation and a strip tension regulation of the rolling process takes place.
  4. Method according to claim 3, characterised in that the reeling devices (9, 10) are regulated in rotational speed.
  5. Method according to claim 3 or 4, characterised in that in a regulating circuit for regulation of the adjustment of the strip store (2, 3), particularly a dancing roller (6, 7), a force correction value calculated by means of a force regulator is determined from an actual force value, which is derived from the adjusting unit (18), and a target force value, wherein the target force value is calculated from the actual angle value, which is derived from the dancing roller, and a predetermined target tension value.
  6. Method according to one of claims 3 to 5, characterised in that the strip store (2, 3) is pre-controlled in dependence on the known change in the course of strip thickness.
EP02767196A 2001-07-11 2002-07-10 Cold rolling mill and method for cold roll forming a metallic strip Revoked EP1406735B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10133756 2001-07-11
DE10133756A DE10133756A1 (en) 2001-07-11 2001-07-11 Cold rolling mill and method for cold rolling metallic strip
PCT/EP2002/007689 WO2003008122A1 (en) 2001-07-11 2002-07-10 Cold rolling mill and method for cold roll forming a metallic strip

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EP1406735A1 EP1406735A1 (en) 2004-04-14
EP1406735B1 true EP1406735B1 (en) 2005-02-09

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EP (1) EP1406735B1 (en)
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CN (1) CN1283380C (en)
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CN102847724B (en) * 2012-08-31 2015-03-04 安徽精诚铜业股份有限公司 Edging roll device of rolling mill

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ATE288798T1 (en) 2005-02-15
ES2235086T3 (en) 2005-07-01
RU2004103859A (en) 2005-05-10
TW587965B (en) 2004-05-21
CA2453297A1 (en) 2003-01-30
ZA200308881B (en) 2004-02-20
CZ20033418A3 (en) 2004-12-15
DE50202231D1 (en) 2005-03-17
WO2003008122A1 (en) 2003-01-30
RU2293616C2 (en) 2007-02-20
CN1283380C (en) 2006-11-08
DE10133756A1 (en) 2003-01-30
CN1527750A (en) 2004-09-08
JP2005500163A (en) 2005-01-06
EP1406735A1 (en) 2004-04-14
US20040177666A1 (en) 2004-09-16
WO2003008122A8 (en) 2004-10-07
KR20040014541A (en) 2004-02-14
BR0209768A (en) 2004-07-27

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