EP0875303B1 - Method for operating a rolling mill for warm and cold rolling flat products - Google Patents

Method for operating a rolling mill for warm and cold rolling flat products Download PDF

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Publication number
EP0875303B1
EP0875303B1 EP98107702A EP98107702A EP0875303B1 EP 0875303 B1 EP0875303 B1 EP 0875303B1 EP 98107702 A EP98107702 A EP 98107702A EP 98107702 A EP98107702 A EP 98107702A EP 0875303 B1 EP0875303 B1 EP 0875303B1
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EP
European Patent Office
Prior art keywords
rolls
rolling
forces
force
measurement
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 - Lifetime
Application number
EP98107702A
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German (de)
French (fr)
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EP0875303A2 (en
EP0875303A3 (en
Inventor
Wolfgang Prof. Dr. Rohde
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
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SMS Demag AG
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Publication date
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Publication of EP0875303A2 publication Critical patent/EP0875303A2/en
Publication of EP0875303A3 publication Critical patent/EP0875303A3/en
Application granted granted Critical
Publication of EP0875303B1 publication Critical patent/EP0875303B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • 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
    • B21B37/42—Control of flatness or profile during rolling of strip, sheets or plates using a combination of roll bending and axial shifting of the rolls
    • 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
    • B21B37/58—Roll-force control; Roll-gap control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B2038/002—Measuring axial forces of rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/10—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll-gap, e.g. pass indicators
    • B21B38/105—Calibrating or presetting roll-gap

Definitions

  • the invention relates to a method for operating a rolling mill for hot and cold rolling of flat products in single or Multiple arrangement of the roll stands having two or more rolls with one, the differential rolling force between the drive and operator side of the rolling stands, with compensation for the bending and Balancing forces corrective control of the Nips.
  • Document DE-A 3,000 187 discloses a corresponding procedure according to the Preamble of claim 1.
  • the essential, the quality-determining requirements for this Process of rolling flat products, such as hot wide strip or Cold strip on tandem rolling mills or reversing mills is the after compliance with the strip flatness over the entire rolled strip length.
  • the prerequisite for fulfilling this requirement is Compliance with parallel roll gaps in all during the rolling process involved scaffolding that the geometric shape of the cross section determine the volume.
  • the invention is based on the knowledge that those without every horizontal shift occurring, the so-called. internal horizontal forces that need compensation. These inner ones Horizontal forces are created by a kind of screwing action on each other unroll the rollers without axial relative movement.
  • the screwing motion is triggered by the entanglement of the rollers within the Stand windows of the roll stands, and the forces reach e.g. on scaffolding in hot-rolled strip finishing lines the order of magnitude 500 kN (approx. 50 t) with the disadvantage known to the rolling mill experts Effects on the parallelism of the roll gap.
  • the conversion in compensation values for the rolling force measurement in the column crossheads does differently than with the above methods, the Measurement of the axial forces on all rolls of the roll stand is necessary.
  • the invention has for its object the above Avoid disadvantages, especially the effect of the horizontal forces that occur on the uprights of the roll stands and those made from them to eliminate the resulting differential rolling force in the adjustment systems and ensure that there is also a change in the axial forces not change in size and direction during operation the differential rolling force between the drive side and the operator side leads.
  • This object is achieved in that the regulation before further processing of flat products on, off on all individual rollers measured additional horizontal corrective value is fed. In doing so, by correcting the corrected Differential rolling force using the cross module for a swivel control, the roll gap contour, regardless of the Band position and the force distribution over the bandwidth can stay and continue according to the invention after a roll change for calibration, the compensated differential rolling force after stacking the rollers are regulated to zero.
  • the measurement of forces in each Work rolls through, in the carrier of the rolls inserted force transducers take place, and the measurement of the axial forces by measuring the hydraulic pressures on such rollers, which are drawn hydraulically are, if necessary. by actual force transducers in the bearing housing of roller bearings are arranged.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)
  • Laminated Bodies (AREA)

Abstract

The method concerns operation of a mill for hot and cold rolling of flat products in single or multiple arrangements of roll stands with two or more rolls. Control of the roll gap takes place with correction of the force difference between the roll drive and operator ends, and compensation of the settings correcting the bending and balancing forces. The method is characterised by the fact that the control system has an additional corrective quantity formed through measurement of the horizontal forces on all individual rolls.

Description

Die Erfindung betrifft ein Verfahren zum Betreiben eines Walzwerks für das Warm- und Kaltwalzen von Flachprodukten in Einzel- oder Mehrfachanordnung der, zwei oder mehr Walzen aufweisenden Walzgerüste mit einer, die Differenzwalzkraft zwischen Antriebs- und Bedienungsseite der Walzgerüste, unter Kompensation der Biege- und Balancierkräfte korrigierenden stellwertgesteuerten Regelung der Walzspalte. Dokument DE-A 3 000 187 offenbart ein entsprechendes Verfahren nach dem Oberbegriff von Anspruch 1.The invention relates to a method for operating a rolling mill for hot and cold rolling of flat products in single or Multiple arrangement of the roll stands having two or more rolls with one, the differential rolling force between the drive and operator side of the rolling stands, with compensation for the bending and Balancing forces corrective control of the Nips. Document DE-A 3,000 187 discloses a corresponding procedure according to the Preamble of claim 1.

Die wesentliche, der qualitätsbestimmenden Forderungen bei diesem Verfahren der Walzung von Flachprodukten, wie Warmbreitband oder Kaltband auf Tandemwalzstraßen oder auch Reversierstraßen ist die, nach Einhaltung der Bandplanheit über die gesamte gewalzte Bandlänge. Voraussetzung für die Erfüllung dieser Forderung ist dabei die Einhaltung von parallelen Walzspalten bei allen am Walzvorgang beteiligten Gerüsten, die die geometrische Form des Querschnitts des Bandes bestimmen.The essential, the quality-determining requirements for this Process of rolling flat products, such as hot wide strip or Cold strip on tandem rolling mills or reversing mills is the after compliance with the strip flatness over the entire rolled strip length. The prerequisite for fulfilling this requirement is Compliance with parallel roll gaps in all during the rolling process involved scaffolding that the geometric shape of the cross section determine the volume.

Die Erfüllung dieser Forderung wird durch das Auftreten von Differenzkräften erschwert, die zwischen den Einzelkräften an Antriebsseite und Bedienungsseite der Walzstraße auftreten. Derartige Differenzkräfte sind die Folge von außermittigen Bewegungen während des Bandlaufs; sie bewirken eine Vergrößerung der Dehnung an der Ständerseite mit der höheren walzkraft und führen zu Unsymmetrien im Bandverlauf und damit zu Planheitsfehlern. The fulfillment of this requirement is due to the occurrence of differential forces complicated between the individual forces on the drive side and operating side of the rolling mill occur. such Differential forces are the result of off-center movements during the tape run; they cause an increase in the elongation at the Stator side with the higher rolling force and lead to asymmetries in the course of the tape and thus to flatness errors.

Um diese Nachteile zu vermeiden, hat man bereits eine Regelung vorgeschlagen, bei der die auftretenden Differenzkräfte kontinuierlich gemessen und über dem sogenannten Cross-Modul in Dehnwerte auf den beiden Ständerseiten umgerechnet werden. Diese Dehnwerte können durch entsprechende Positions-Sollwerte für die beiden Anstellsysteme an der Antriebsseite und der Bedienungsseite der Walzgerüste kompensiert werden. Die Form des Walzspaltes bleibt damit vom außermittigem Bandlauf unbeeinflußt.In order to avoid these disadvantages, there is already a regulation proposed, in which the differential forces occurring continuously measured and above the so-called cross module in elongation values the two sides of the stand. These elongation values can by corresponding position setpoints for the two adjustment systems on the drive side and the operating side of the roll stands be compensated. The shape of the roll gap thus remains from unaffected belt run unaffected.

Diese Art der Regelung wird jedoch von ungleichen Kräften bei der Biegung der Arbeitswalzen sowie der Balancierung von Stützwalzen und Arbeitswalzen an Antriebs- und Bedienungsseite der Walzgerüste störend beeinflußt, ferner von der Ungleichheit der Größe der Hebelarme dieser Kräfte als Folge der Verschiebung der Walzen und von Reaktionskräften, die sich aus den Horizontalkräften an Arbeitswalzen, Stützwalzen und gegebenenfalls auch Zwischenwalzen ergeben.However, this type of regulation is caused by unequal forces at the Bending of the work rolls and the balancing of backup rolls and work rolls on the drive and operating side of the roll stands influenced by the inequality of the size of the Lever arms of these forces as a result of the displacement of the rollers and of reaction forces resulting from the horizontal forces on work rolls, Back-up rolls and if necessary also intermediate rolls.

Es wurde deshalb schon vorgeschlagen, die Wirkungen der unterschiedlichen Kräfte aus Balancierungen und Biegesystemen sowie der unterschiedlichen Hebelarme meßtechnisch zu erfassen und die Meßergebnisse zur Korrektur der walzkräfte an Antriebsseite und Bedienungsseite heranzuziehen. Dabei wurden jedoch die erwähnten Horizontalkräfte, die je nach ihrer Richtung zu erheblichen Differenzkräften in den Anstellsystemen führen können, nicht berücksichtigt.It has therefore already been suggested the effects of different Forces from balancing and bending systems as well as the different Lever arms to measure and the measurement results for correcting the rolling forces on the drive side and operating side consulted. However, the horizontal forces mentioned, which, depending on their direction, lead to considerable differential forces in the adjustment systems, not taken into account.

Aus der DE 30 00 187 C2 ist es bekannt, antriebs- und bedienungsseitig meßbare Walzkräfte, die durch Walzenverschiebung entstehen, zu kompensieren. Diese Verschiebung erfolgt häufig mit relativ hoher Geschwindigkeit, und die resultierenden Horizontalkräfte reichen bis an die zwischen den Walzen entstehenden Reibkräfte heran. Diese Horizontalkräfte werden dabei unter Annahme eines konstanten Reibwertes bestimmt. Voraussetzung ist dabei aber immer, daß die Walzen relativ zueinander verschoben werden. From DE 30 00 187 C2, it is known, on the drive and operator side measurable rolling forces caused by roll displacement, to compensate. This shift is often relatively high Speed, and the resulting horizontal forces are sufficient up to the frictional forces that arise between the rollers. This Horizontal forces are assumed assuming a constant coefficient of friction certainly. The prerequisite is always that the rollers be shifted relative to each other.

Der Erfindung liegt die Erkenntnis zugrunde, daß bereits die ohne jede Walzenverschiebung auftretenden Horizontalkräfte, die sog. inneren Horizontalkräfte, der Kompensation bedürfen. Diese inneren Horizontalkräfte entstehen durch eine Art Schraubwirkung der aufeinander abrollen den Walzen ohne axiale Relativbewegung. Die Schraubbewegung wird ausgelöst durch das Verschränken der walzen innerhalb der Ständerfenster der Walzgerüste, und die Kräfte erreichen z.B. an Gerüsten in Warmbreitband-Fertigstraßen die Größenordnung von 500 kN (ca. 50 t) mit den den Walzwerkfachleuten bekannten nachteiligen Wirkungen auf die Parallelität des Walzspaltes. Die Umrechnung in Kompensationswerte für die Walzkraftmessung in den Ständerquerhäuptern macht anders, als bei den obengenannten Methoden, die Messung der Axialkräfte an allen Walzen des Walzgerüstes notwendig.The invention is based on the knowledge that those without every horizontal shift occurring, the so-called. internal horizontal forces that need compensation. These inner ones Horizontal forces are created by a kind of screwing action on each other unroll the rollers without axial relative movement. The screwing motion is triggered by the entanglement of the rollers within the Stand windows of the roll stands, and the forces reach e.g. on scaffolding in hot-rolled strip finishing lines the order of magnitude 500 kN (approx. 50 t) with the disadvantage known to the rolling mill experts Effects on the parallelism of the roll gap. The conversion in compensation values for the rolling force measurement in the column crossheads does differently than with the above methods, the Measurement of the axial forces on all rolls of the roll stand is necessary.

Der Erfindung liegt die Aufgabe zugrunde, die oben aufgezeigten Nachteile zu vermeiden, insb. die Wirkung der auftretenden Horizontalkräfte auf die Ständerholme der Walzgerüste und die daraus resultierende Differenzwalzkraft in den Anstellsystemen zu beseitigen und sicherzustellen, daß auch eine Veränderung der Axialkräfte in Größe und Richtung während des Betriebes nicht zu einer Veränderung der Differenzwalzkraft zwischen Antriebsseite und Bedienungsseite führt.The invention has for its object the above Avoid disadvantages, especially the effect of the horizontal forces that occur on the uprights of the roll stands and those made from them to eliminate the resulting differential rolling force in the adjustment systems and ensure that there is also a change in the axial forces not change in size and direction during operation the differential rolling force between the drive side and the operator side leads.

Diese Aufgabe wird dadurch gelöst, daß der Regelung vor Weiterverarbeitung der Flachprodukte ein, aus bei allen einzelnen Walzen gemessenen Horizontalkräften gebildeter zusätzlicher Korrektur-Stellwert zugeführt wird. Dabei wird durch Heranziehen der korrigierten Differenzwalzkraft unter Verwendung des Cross-Moduls für eine Schwenkregelung, die Walzspaltkontur, unabhängig von der Bandlage und der Kraftverteilung über die Bandbreite erhalten bleiben und weiter kann erfindungsgemäß nach einem Walzenwechsel zur Kalibrierung die kompensierte Differenzwalzkraft nach Aufeinandersetzen der Walzen zu Null geregelt werden. Wie die Erfindung weiter vorsieht, kann die Messung der Kräfte in den einzelnen Arbeitswalzen durch, in die Träger der Walzen eingesetzte Kraftgeber erfolgen, und die Messung der Axialkräfte durch Messung der Hydraulikdrücke an solchen walzen erfolgen, die hydraulisch gezogen werden, ggfs. durch Kraft-Istwertgeber, die im Lagergehäuse der walzenlager angeordnet sind.This object is achieved in that the regulation before further processing of flat products on, off on all individual rollers measured additional horizontal corrective value is fed. In doing so, by correcting the corrected Differential rolling force using the cross module for a swivel control, the roll gap contour, regardless of the Band position and the force distribution over the bandwidth can stay and continue according to the invention after a roll change for calibration, the compensated differential rolling force after stacking the rollers are regulated to zero. Like the invention Provides further, the measurement of forces in each Work rolls through, in the carrier of the rolls inserted force transducers take place, and the measurement of the axial forces by measuring the hydraulic pressures on such rollers, which are drawn hydraulically are, if necessary. by actual force transducers in the bearing housing of roller bearings are arranged.

Durch die Messung der Axialkräfte aller im jeweiligen Walzgerüst bef indlichen Walzen werden in Abhängigkeit von den aktuellen Walzendurchmessern die einzelnen Kräftepaare bestimmt. Aus den Summen der Kräftepaare wird die auftretende Differenzwalzkraft online errechnet. Durch Verknüpfung mit dem Cross-Modul werden Kompensationswerte für die Anstellsysteme bestimmt und zur Kompensation der gemessenen Walzkräfte auf Antriebsseite und Bedienungsseite herangezogen.By measuring the axial forces of all in the respective roll stand The actual rolls are dependent on the current roll diameters the individual pairs of forces determined. From the sums of The occurring differential rolling force is calculated online. By linking to the cross module there are compensation values intended for the adjustment systems and to compensate for the measured Rolling forces on the drive side and operating side are used.

In Verbindung mit der an sich bekannten Kompensation von Biegekräften und Balancierkräften stellen diese Maßnahmen sicher, daß die Differenzwalzkraft von der Antriebsseite zur Bedienungsseite von allen Kraftanteilen bereinigt wird, deren Ursache nicht im walzspalt selbst zu suchen ist.In connection with the known compensation of bending forces and balancing forces ensure that the Differential rolling force from the drive side to the operating side from all force components are corrected, the cause of which is not in the roll gap is to be searched for.

Claims (5)

  1. Method of operating a rolling mill for hot rolling and cold rolling of flat products in single or multiple arrangement of the roll stands, which have two or more rolls, with regulation, which is controlled by setting value and which corrects the differential rolling force between drive side and control side of the roll stands with compensation of the bending and balancing forces, of the rolling gap, wherein an additional corrective setting value, which is formed from horizontal forces measured at all individual rolls, is fed to the regulation before further processing of the flat products, characterised in that the rolling gap contour is maintained over the strip width independently of the strip position and the force distribution through utilisation of the corrected differential rolling force under use of the Cross modulus for a pivot regulation.
  2. Method according to claim 1, characterised in that after a roll change for sizing, the compensated differential rolling force is regulated to zero after setting the rolls on one another.
  3. Method according to claim 1, characterised in that the measurement of the forces in the individual rolls (working rolls) is carried out by force transmitters inserted in the supports of the rolls.
  4. Method according to claim 1, characterised in that the measurement of the axial forces is carried out by measurement of the hydraulic pressures at such rolls, which are hydraulically displaced.
  5. Method according to claim 1, characterised in that the measurement of the axial forces is carried out by force actual value transmitters, which are arranged in the bearing housings of the roll bearings.
EP98107702A 1997-05-02 1998-04-28 Method for operating a rolling mill for warm and cold rolling flat products Expired - Lifetime EP0875303B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19718529 1997-05-02
DE19718529A DE19718529A1 (en) 1997-05-02 1997-05-02 Method for operating a rolling mill for hot and cold rolling flat products

Publications (3)

Publication Number Publication Date
EP0875303A2 EP0875303A2 (en) 1998-11-04
EP0875303A3 EP0875303A3 (en) 2000-01-12
EP0875303B1 true EP0875303B1 (en) 2004-02-04

Family

ID=7828393

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EP98107702A Expired - Lifetime EP0875303B1 (en) 1997-05-02 1998-04-28 Method for operating a rolling mill for warm and cold rolling flat products

Country Status (8)

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US (1) US6142000A (en)
EP (1) EP0875303B1 (en)
JP (1) JPH10314819A (en)
CN (1) CN1138603C (en)
AT (1) ATE258829T1 (en)
BR (1) BR9801537A (en)
DE (2) DE19718529A1 (en)
ES (1) ES2216199T3 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1757378B1 (en) 1998-02-27 2011-09-07 Nippon Steel Corporation Strip rolling mill calibration method and device for the same
AU777487B2 (en) * 1998-02-27 2004-10-21 Nippon Steel & Sumitomo Metal Corporation Strip rolling method and strip rolling mill
DE102005055106A1 (en) * 2005-11-18 2007-05-24 Sms Demag Ag A method and rolling line for improving the threading of a metal strip rolling whose rolled strip end expires at rolling speed
DE102006051728B4 (en) * 2006-10-30 2013-11-21 Outokumpu Nirosta Gmbh Method for rolling metal strips, in particular steel strips
EP2014380A1 (en) * 2007-06-11 2009-01-14 ArcelorMittal France Method of rolling a band of metal with adjustment of its lateral position on the one hand and adapted rolling mill
CN101733290B (en) * 2008-11-18 2013-05-01 鞍钢股份有限公司 Automatic control system for preventing drift of hot continuous rolling thin strip steel
CN106881358A (en) * 2017-03-22 2017-06-23 中冶华天工程技术有限公司 Mill roll-gap measures control method
CN107309279B (en) * 2017-08-16 2019-01-15 上海鼎艺冶金科技有限公司 A kind of mill gap supporting remote dynamic management system
CN108213090B (en) * 2017-12-29 2019-10-25 武汉钢铁有限公司 A kind of finishing mill acyclic homologically trioial method
CN114309071A (en) * 2021-12-31 2022-04-12 中冶南方工程技术有限公司 Six-roller mill and strip shape control method

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JPS5597806A (en) * 1979-01-17 1980-07-25 Hitachi Ltd Method and apparatus for correcting asymmetry of rolling mill
JPS5924509A (en) * 1982-07-30 1984-02-08 Hitachi Ltd Method and device for correcting asymmetry of material to be rolled in rolling mill
JPS61182816A (en) * 1985-02-07 1986-08-15 Ishikawajima Harima Heavy Ind Co Ltd Roller parallelism controlling method of rolling mill having asymmetrical upper and lower rollers and its apparatus
DE4035276C1 (en) * 1990-11-02 1992-05-07 Mannesmann Ag, 4000 Duesseldorf, De
JPH05138219A (en) * 1991-11-26 1993-06-01 Kawasaki Steel Corp Rolling method
JPH05169120A (en) * 1991-12-19 1993-07-09 Sumitomo Metal Ind Ltd Method for controlling camber of rolled stock
JP2607015B2 (en) * 1992-11-16 1997-05-07 新日本製鐵株式会社 Automatic thickness control method in pair cross rolling
US5448901A (en) * 1994-05-03 1995-09-12 The University Of Toledo Method for controlling axial shifting of rolls
DE19500336A1 (en) * 1995-01-07 1996-07-11 Schloemann Siemag Ag Process for controlling the roll gap profile
DE19530424A1 (en) * 1995-08-18 1997-02-20 Schloemann Siemag Ag Method for compensating forces on roll stands resulting from horizontal movements of the rolls

Also Published As

Publication number Publication date
CN1200963A (en) 1998-12-09
BR9801537A (en) 1999-03-09
US6142000A (en) 2000-11-07
EP0875303A2 (en) 1998-11-04
ES2216199T3 (en) 2004-10-16
DE19718529A1 (en) 1998-11-12
EP0875303A3 (en) 2000-01-12
DE59810693D1 (en) 2004-03-11
JPH10314819A (en) 1998-12-02
ATE258829T1 (en) 2004-02-15
CN1138603C (en) 2004-02-18

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