EP0173045B1 - Commande de la planéité pour cages de cylindres à feuillards - Google Patents

Commande de la planéité pour cages de cylindres à feuillards Download PDF

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Publication number
EP0173045B1
EP0173045B1 EP85108724A EP85108724A EP0173045B1 EP 0173045 B1 EP0173045 B1 EP 0173045B1 EP 85108724 A EP85108724 A EP 85108724A EP 85108724 A EP85108724 A EP 85108724A EP 0173045 B1 EP0173045 B1 EP 0173045B1
Authority
EP
European Patent Office
Prior art keywords
strip
flatness
flatness control
rolling force
rolling
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
Application number
EP85108724A
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German (de)
English (en)
Other versions
EP0173045A1 (fr
Inventor
Bernhard Dr.-Ing. Siemon
Heinz Dipl.-Ing. Teichert
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.)
Vodafone GmbH
Original Assignee
Mannesmann 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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Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0173045A1 publication Critical patent/EP0173045A1/fr
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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
    • B21B2265/00—Forming parameters
    • B21B2265/12—Rolling load or rolling pressure; roll force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2273/00—Path parameters
    • B21B2273/12—End of product

Definitions

  • the invention relates to a flatness control with measuring devices for determining the rolling force and change in rolling force as well as adjusting devices for controlling flatness errors equipped strip rolling stands according to the specification of manually or automatically retrievable target values and actual values determined by a measuring system and detecting the flatness.
  • the rolling speeds are increased to the operating speeds only after the strip has been rolled on or after the threading phase.
  • the change in the forming speed also leads to a change in the resistance to deformation, which has to be taken into account because a changing rolling speed causes a change in the rolling force.
  • the thickness of the strip that is running out is changed if the thickness of the strip is not kept constant using the rolling force as a manipulated variable. Because the mere change in the rolling force does not take into account the changing elastic deformation of the work or support rollers of the stand, so that an impairment of the strip flatness can be expected due to the violation of the profile of the strip cross section, this is not sufficient for the quality requirements.
  • the present invention has for its object to provide a flatness control for strip rolling stands, which ensures a constant flatness of the strip when changing the rolling force or the resistance to deformation of the strip to be rolled.
  • a correction value determined theoretically by the change in the rolling force or determined by the series of measurements is applied to the control circuit of the flatness control by means of a precontrol.
  • the control causes the inertia caused by the distance between the roll gap and the flatness measuring system known control systems switched off; the flatness errors are compensated for at the point of origin, so that the occurrence of changes in the flatness of the belt e.g. in the event of changes in speed is excluded.
  • Changes in the flatness of the band with great timing, e.g. Changes in the profile of the supporting strip or thermal influences can advantageously still be countered with the known control concepts of the strip flatness control.
  • the correction value is determined by means of a simulation curve, taking into account the structural dimensions of the roll stand, the width and the profile of the strip to be rolled, and the rolling force.
  • the proposed method thus uses the change in the rolling force to pre-control the control loop of the flatness control by means of characteristic curves, in that a change in the bending force of the work, intermediate or support rolls is determined on the basis of the characteristic curves by a process computer, taking into account the strip geometry (profile and width of the incoming strip), with the stipulation that the rolling strip profile should be kept constant when the rolling force changes.
  • the simulation calculation is carried out on the basis of pass schedule data with a computing model on an EDP system, with which, by comparing the theoretically determined strip profiles with the target strip profile, the manipulated variable is determined which leads to the best possible match between the target and actual strip profile curve of the rolling stock .
  • the e.g. Value pairs of rolling force / bending force determined in this way can be graphically plotted according to strip width and passes.
  • equilibrium straight line equations can also be determined and recorded, whereby it has been shown that the dependency on rolling force / bending force can be represented very well by a straight line equation in all examined cases.
  • the strip rolling stand is equipped with a measuring device for detecting the rolling force Fw or the change in the rolling force ⁇ fw. Furthermore, the roll stand contains actuating devices 8 for the correction of flatness errors, as indicated in S, F B , Q and HC8.
  • the known control loop consisted of the measuring system for the strip flatness, which is indicated at 6, the measured value of which was compared with target curves in the flatness control (indicated at 7) and, if necessary, a signal to the actuating devices for controlling flatness errors (indicated at 8) ).
  • the operator was able to intervene in this control loop, as also indicated at 2, in order to correct flatness errors by changing the rolling force.
  • the present invention provides to use the precontrol indicated at 9 in order to apply a correction value determined by rolling force change ⁇ Fw to the known control system by means of predetermined characteristic curves created by simulation calculation, with which flatness errors can be controlled without delay.
  • the conventional control loop remains intact, so that changes in the strip flatness can still be compensated for by the conventional control loop with great timing.
  • the feedforward control according to the invention although it can be used during the entire rolling process, is primarily suitable for compensating for changes in strip flatness during the threading-in phase when the strip is rolled on and during strip run-out by changes in speed.

Claims (2)

1. Régulation de planéité sur des cages de laminoir de bandes, équipées de dispositifs de mesure pour déterminer l'effort de laminage et la variation de cet effort, ainsi que de dispositifs de réglage pour la régulation de défauts de planéité après fourniture préalable de valeurs de consigne susceptibles d'être appelées manuellement ou automatiquement, et de valeurs réelles appréhendant la planéité de la bande et déterminées par un système de mesure, régulation caractérisée en ce qu'une valeur de correction, déterminée de façon théorique par la variation de l'effort de laminage, ou bien déterminée par des séries de mesures, est introduite au moyen d'une pré- commande dans le circuit de réglage de la régulation de planéité.
2. Régulation de planéité selon la revendication 1, caractérisée en ce que la valeur de correction est déterminée par l'intermédiaire d'une courbe caractéristique, établie par calcul de simulation, en tenant compte des dimensions de construction de la cage de laminoir, de l'effort de laminage, ainsi que de la largeur et du profil de la bande à laminer.
EP85108724A 1984-08-16 1985-07-12 Commande de la planéité pour cages de cylindres à feuillards Expired EP0173045B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843430034 DE3430034A1 (de) 1984-08-16 1984-08-16 Planheitsregelung an bandwalzgeruesten
DE3430034 1984-08-16

Publications (2)

Publication Number Publication Date
EP0173045A1 EP0173045A1 (fr) 1986-03-05
EP0173045B1 true EP0173045B1 (fr) 1988-12-28

Family

ID=6243109

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85108724A Expired EP0173045B1 (fr) 1984-08-16 1985-07-12 Commande de la planéité pour cages de cylindres à feuillards

Country Status (3)

Country Link
US (1) US4753093A (fr)
EP (1) EP0173045B1 (fr)
DE (1) DE3430034A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4091342C2 (de) * 1989-07-31 1993-11-04 Toshiba Kawasaki Kk Vorrichtung zur lagesteuerung einer walzplatte

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3823202A1 (de) * 1988-07-08 1990-01-11 Betr Forsch Inst Angew Forsch Verfahren zum kaltwalzen von blechen und baendern
DE3840016A1 (de) * 1988-11-26 1990-05-31 Schloemann Siemag Ag Verfahren zum richten von blechen, baendern, tafeln, profilen, traegern etc.
DD294883A5 (de) * 1990-06-05 1991-10-17 Freiberg Bergakademie Verfahren zur erzeugung von eigenspannungsarmen band beim walzen
WO1993000181A1 (fr) * 1991-06-28 1993-01-07 Siemens Aktiengesellschaft Systeme de regulation de la fabrication de feuillards lamines a chaud au moyen de laminoirs a chaud a cages multiples
US5325692A (en) * 1992-09-28 1994-07-05 Sumitomo Light Metal Industries, Ltd. Method of controlling transverse shape of rolled strip, based on tension distribution
DE19843899C1 (de) * 1998-09-24 2000-05-04 Bwg Bergwerk Walzwerk Verfahren und Vorrichtung zur Planheitsmessung von Bändern
US20100318245A1 (en) * 2005-03-03 2010-12-16 Nabtesco Corporation Flight control system
CN101511490B (zh) 2006-08-28 2015-09-09 气体产品与化学公司 喷射低温液体的喷射装置和与该装置相关的喷射方法
EP2200762B1 (fr) * 2007-08-28 2014-08-06 Air Products and Chemicals, Inc. Procédé et appareil de décharge d'un spray cryogénique non linéaire sur la largeur d'une cage de laminoir
CN101855495B (zh) 2007-08-28 2013-02-06 气体产品与化学公司 用于控制致冷剂温度的设备和方法
CA2696239A1 (fr) * 2007-08-28 2009-03-12 Air Products And Chemicals, Inc. Appareil et procede pour surveiller et reguler un refroidissement cryogenique
WO2009032688A1 (fr) * 2007-08-28 2009-03-12 Air Products And Chemicals, Inc. Appareil et procédé servant à produire des surfaces sans condensation et sans givre sur des composants cryogéniques
EP2197600A4 (fr) * 2007-08-28 2011-10-05 Air Prod & Chem Écoulement de cryogène sur des surfaces de pièces à travailler dans un laminoir à froid
CN102716917B (zh) * 2012-06-21 2015-03-04 中冶南方工程技术有限公司 冷轧带钢板形目标曲线手动调整计算方法

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1199203A (en) * 1966-11-30 1970-07-15 Nippon Kokan Kk Apparatus for Controlling the Shape of a Workpiece During Rolling
US3568637A (en) * 1968-05-13 1971-03-09 Westinghouse Electric Corp Tandem mill force feed forward adaptive system
US3630055A (en) * 1969-05-14 1971-12-28 Gen Electric Workpiece shape control
US3855830A (en) * 1969-08-04 1974-12-24 Hitachi Ltd Method and apparatus for controlling plate thickness in a rolling mill
US3934438A (en) * 1973-05-09 1976-01-27 Nippon Kokan Kabushiki Kaisha Method of long-edge shape control for tandem rolling mill
US4125004A (en) * 1977-07-12 1978-11-14 Amtel, Inc. Rolling mill gauge control system
JPS55112111A (en) * 1979-02-23 1980-08-29 Hitachi Ltd Controller for continuous rolling mill
US4244025A (en) * 1979-03-20 1981-01-06 Alshuk Thomas J Rolling mill gauge control system
DE2927769A1 (de) * 1979-07-10 1981-02-05 Schloemann Siemag Ag Verfahren und anlage zur planwalzung von bandmaterial aus stahl und nichteisenmetall
JPS5611103A (en) * 1979-07-10 1981-02-04 Ishikawajima Harima Heavy Ind Co Ltd Method and apparatus for controlling shape of rolled sheet
GB2100470A (en) * 1981-04-25 1982-12-22 British Aluminium Co Ltd Working strip material
JPS586713A (ja) * 1981-07-06 1983-01-14 Ishikawajima Harima Heavy Ind Co Ltd 圧延機の形状制御装置
DE3216317A1 (de) * 1982-05-03 1983-11-03 Ishikawajima-Harima Jukogyo K.K., Tokyo Verfahren und vorrichtung zur veraenderbaren regelung der quersteifigkeit eines walzwerkes
DE3240602A1 (de) * 1982-11-03 1984-06-14 Betriebsforschungsinstitut VDEh - Institut für angewandte Forschung GmbH, 4000 Düsseldorf Verfahren zum regeln der zugspannungsverteilung beim kaltwalzen von baendern
EP0121148B1 (fr) * 1983-03-14 1989-02-15 Sms Schloemann-Siemag Aktiengesellschaft Procédé pour la fabrication de feuillard à chaud avec section et planéité de bande de haute qualité
US4513594A (en) * 1983-08-22 1985-04-30 Tippins Machinery Company, Inc. Method and apparatus for combining automatic gauge control and strip profile control

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4091342C2 (de) * 1989-07-31 1993-11-04 Toshiba Kawasaki Kk Vorrichtung zur lagesteuerung einer walzplatte

Also Published As

Publication number Publication date
DE3430034C2 (fr) 1988-03-10
US4753093A (en) 1988-06-28
EP0173045A1 (fr) 1986-03-05
DE3430034A1 (de) 1986-02-27

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