EP2228148B1 - Procédé destiné au fonctionnement d'un train de laminage, en particulier d'une installation de laminage à froid - Google Patents

Procédé destiné au fonctionnement d'un train de laminage, en particulier d'une installation de laminage à froid Download PDF

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Publication number
EP2228148B1
EP2228148B1 EP10000661A EP10000661A EP2228148B1 EP 2228148 B1 EP2228148 B1 EP 2228148B1 EP 10000661 A EP10000661 A EP 10000661A EP 10000661 A EP10000661 A EP 10000661A EP 2228148 B1 EP2228148 B1 EP 2228148B1
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EP
European Patent Office
Prior art keywords
thickness
wsp
roll gap
speed
rolled strip
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.)
Active
Application number
EP10000661A
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German (de)
English (en)
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EP2228148A1 (fr
Inventor
Luis Rey-Mas
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.)
GE Energy Power Conversion GmbH
Original Assignee
Converteam GmbH
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Publication date
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Publication of EP2228148A1 publication Critical patent/EP2228148A1/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
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/02—Transverse dimensions
    • B21B2261/04—Thickness, gauge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2275/00—Mill drive parameters
    • B21B2275/02—Speed
    • B21B2275/04—Roll speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2275/00—Mill drive parameters
    • B21B2275/02—Speed
    • B21B2275/06—Product speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • 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
    • B21B37/56—Elongation 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
    • B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product

Definitions

  • the invention relates to a method for operating a rolling train, in particular a cold rolling mill according to the preamble of claim 1.
  • a method for controlling the thickness of a rolled strip in a rolling train of a rolling mill is known. This method is based on a mass flow control, in which the initial thickness of the rolled strip is calculated from the measured input thickness of the rolled strip and from the measured inlet and outlet speeds at the roll gap.
  • the measurement of the speed of the rolled strip at the outlet of the roll gap has proven to be problematic, since vibrations or a dirty measuring point or other measurement errors can lead to disturbances in the thickness control.
  • the object of the invention is to provide a method of the type mentioned, which has a greater accuracy and reliability.
  • the invention solves this problem by a method according to claim 1.
  • the rolling train has working rolls between which there is a nip through which a rolled strip is passed.
  • the thickness and the entry speed of the rolled strip before the nip are measured.
  • the exit speed of the rolled strip after the nip is simulated by means of the tangential speed of the work rolls.
  • the thickness after the nip is determined by means of the thickness and the entry speed before the nip and the simulated exit speed.
  • the determined thickness after the nip is compared with a measured thickness after the nip, wherein the determined thickness is preferably corrected by means of a delay element.
  • a variable, namely the resulting difference is made available to the said replica can act such that this size is as possible zero.
  • the accuracy of the simulated discharge speed of the rolled strip is increased after the nip.
  • the difference of the determined thickness and the measured thickness is integrated after the nip and subsequently optionally multiplied by the tangential speed of the work rolls. This achieves a simple, but nevertheless very accurate simulation of the discharge speed after the roll gap.
  • a further embodiment of the invention is that the result of the multiplication is added to the tangential speed of the work rolls and the result of this addition forms the exit speed of the rolled strip after the roll gap.
  • the sole figure of the drawing shows a schematic block diagram of an embodiment of a A method according to the invention for operating a rolling train.
  • a rolling train 10, in particular a cold rolling mill, has an uncoiler 11, from which a rolled strip 12 is guided via deflection rollers to a rolling stand 13.
  • a measuring device 15, in particular a laser measuring device is arranged before the roll stand 13.
  • the measuring device 15 is provided for measuring an entry speed XV0_b of the rolled strip 12 in front of the roll stand 13.
  • a thickness gauge 17 is arranged, which is provided for measuring a thickness XH0_dmg of the rolled strip 12 in front of the roll stand 13.
  • the rolling stand 13 of the rolling train 10 has working rolls 19, between which there is a roll gap 20, through which the rolled strip 12 is passed.
  • the work rolls 19 are driven by a drive motor 21 via a transmission.
  • the drive motor 21 is associated with a measuring device 23, which is provided for measuring a rotational speed of the drive motor 21. With the help of the diameter of the work rolls 19 and with the help of the translation of the gear so that the tangential speed XV1_aw the work rolls 19 is available.
  • a measuring device 25 is arranged, which is provided for measuring a thickness XH1_dmg of the rolled strip 12 after the roll stand 13.
  • the thickness of the rolled strip 12 immediately before the nip 20 is indicated in the figure as the thickness XH0_wsp, and the thickness of the rolled strip 12 immediately after the nip 20 is indicated as the thickness XH1_wsp. Both quantities are not measured, but - as explained below - calculated.
  • the roll gap 20 is adjustable in the present embodiment. This can be achieved in that the work rolls 19 of the rolling train 10 are mutually adjustable. The position of the work rolls 19 to each other and thus the setting of the roll gap 20 is characterized in the figure by a manipulated variable dWS1.
  • the rolling train 10 is associated with a control and / or regulation 30, are fed to the infeed speed XV0_b and the thicknesses XH0_dmg and XH1_dmg before and after the roll stand 13 of the rolling mill 10, and of which the manipulated variable dWS1 generated and the rolling mill 10 is supplied.
  • the control and / or regulation 30 performs a path mapping 31, with the aid of which the already mentioned thickness XH0_wsp, which is present immediately before the roll gap 20, is determined from the thickness XH0_dmg measured in front of the roll stand 13. In the present exemplary embodiment, this is achieved by forming a delay element with the aid of the entry speed XV0_b, which takes into account the length of time that the rolled strip 12 requires for the path from the measuring device 15 to the nip 20.
  • the control and / or regulation 30 performs a multiplication 32 of the entry speed XV0_b of the rolled strip with the thickness XH0_wsp immediately before the nip 20.
  • the resulting product represents the left side of the basic equation of a mass flow control.
  • the right-hand side of this basic equation is formed by the product of the already mentioned thickness XH1_wsp, which is present immediately after the nip 20, with a discharge speed XV1_b of the rolled strip 12.
  • the exit speed XV1_b is not present in the present case, but is - as explained below - mathematically modeled or modeled.
  • control and / or regulation 30 performs a comparison 33 between the measured thickness XH1_dmg after the roll stand 13 and a calculated thickness XH1-dmgber.
  • the difference between the two thicknesses is fed to an integration 34 and the integrated difference then represents a factor of a multiplication 35.
  • This multiplication 35 is fed with the tangential speed XV1_aw of the work rolls 19 as a further factor.
  • the product resulting from the multiplication 35 is added by means of an addition 36 to the said tangential speed XV1_aw of the work rolls 19, whereby an outflow speed XV1_wsp immediately after the roll gap 20 results.
  • This calculated exit speed XV1_wsp is used as a replica or modeling of the abovementioned discharge speed XV1_b of the rolled strip.
  • the controller 30 executes a division 37 in which the product of the left side of the illustrated basic equation formed by the multiplication 32 is divided by the discharge speed.
  • the control and / or regulation 30 performs a path mapping 38, by means of which the aforementioned thickness XH1-dmgber is determined from the calculated thickness XH1_wsp immediately after the roll gap 20.
  • this is achieved by forming a delay element with the aid of the simulated discharge speed XV1_wsp, which takes into account the length of time that the rolled strip 12 requires for the path from the roll gap 20 to the measuring device 25.
  • the thickness XH1_wsp immediately after the nip 20 is used as the actual thickness of the rolled strip 12, which is fed to a comparison 39 with a nominal thickness WH1 of the rolled strip 12.
  • the PI controller 40 generates the manipulated variable dWS1, with which, as already mentioned, the roll gap 20 is set.
  • the control and / or control 30 is provided with a switch 41, with which no longer the calculated, immediately after the nip 20 existing thickness XH1_wsp is used as the actual thickness, but instead measured by the meter 25 thickness XH1_dmg.
  • This thickness XH1_dmg is then compared with the target thickness WH1 and the Difference is supplied to the PI controller 40.
  • the PI controller 40 then generates the manipulated variable dWS1 for influencing the roll gap 20.
  • the variables influencing the proportional and / or the integral component of the PI controller 40 may be selected differently than in normal operation. Preferably, a so-called monitor control can be used to this extent.
  • the switching 41 is influenced by the difference formed by the thicknesses XH1_dmg and XH1_dmgber. If this difference is smaller than a predefinable threshold value, then the rolling train 10 is in its normal operation and the changeover 41 transmits the calculated thickness XH1_wsp, which is present immediately after the roll gap 20, as the actual thickness. However, if the said difference is greater than the threshold value, then there is no normal operation and the measured thickness XH1_dmg is passed on as the actual thickness.
  • the threshold value may have the value of +/- 3% of the target thickness WH1.
  • the outfeed speed XV1_wsp of the rolled strip 12 immediately after the nip 20 is reproduced from the tangential speed XV1_aw of the work rolls 19. This is achieved, inter alia, by correcting the thickness XH1_wsp of the rolled strip 12 immediately after the nip 20 calculated from the simulated exit speed XV1_wsp by means of the path image 38 and then comparing it with the measured thickness XH1_dmg of the rolled strip 12, and that the integrator 34 and the multiplier 35 act on the simulated discharge speed XV1_wsp such that the difference resulting from the aforementioned comparison becomes zero as far as possible.
  • the described control and / or regulation 30 is realized by means of an electronic circuit. This can be an analog circuit or a digital computing device. If a computing device is present, then the explained control and / or regulation 30 is in the form of a computer program which is stored on a memory of the computing device and which is suitable for carrying out the explained processes of the control and / or regulation 30.

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

Claims (15)

  1. Procédé de mise en oeuvre d'un train de laminage (10), notamment un train de laminage à froid, ledit train de laminage (10) comportant des cylindres de travail (19) définissant entre eux une emprise (20) à travers laquelle on fait passer un feuillard (12), procédé dans lequel l'épaisseur XH0_dmg et la vitesse d'approche XV0_b du feuillard (12) sont mesurées en amont de l'emprise (20), caractérisé en ce que la vitesse de sortie XV1_wsp du feuillard (12) en aval de l'emprise (20) est calculée à partir de la vitesse tangentielle XV1_aw des cylindres de travail (19), et en ce que l'épaisseur XH1_wsp en aval de l'emprise (20) est calculée à partir de l'épaisseur XH0_dmg et de la vitesse d'approche XV0_b en amont de l'emprise (20) ainsi que de la vitesse de sortie calculée XV1_wsp.
  2. Procédé selon la revendication 1, dans lequel la vitesse tangentielle XV1_aw des cylindres de travail (19) est calculée en fonction du régime d'un moteur d'entraînement (21) des cylindres de travail (19).
  3. Procédé selon la revendication 1 ou la revendication 2, dans lequel l'épaisseur calculée XH1_wsp en aval de l'emprise (20) est corrigée puis comparée (33) à une épaisseur mesurée XH1_dmg en aval de l'emprise (20).
  4. Procédé selon la revendication 3, dans lequel l'épaisseur calculée XH1_wsp est corrigée à l'aide d'une ligne de retard (38).
  5. Procédé selon la revendication 3 ou la revendication 4, dans lequel la différence entre l'épaisseur calculée corrigée et l'épaisseur mesurée XH1_dmg en aval de l'emprise (20) est intégrée (34).
  6. Procédé selon la revendication 5, dans lequel la différence intégrée est multipliée (35) par la vitesse tangentielle XV1_aw des cylindres de travail (19).
  7. Procédé selon la revendication 6, dans lequel le produit de la multiplication est ajouté (36) à la vitesse tangentielle XV1_aw des cylindres de travail et le résultat de cette addition donne la vitesse de sortie XV1_wsp du feuillard (12) en aval de l'emprise (20).
  8. Procédé selon l'une quelconque des revendications 1 à 7, dans lequel l'épaisseur calculée XH1_wsp du feuillard (12) en aval de l'emprise (20) est comparée (39) à une valeur de consigne (WH1).
  9. Procédé selon la revendication 8, dans lequel - en cas de fonctionnement anormal du train de laminage (10) - ce n'est pas l'épaisseur calculée XH1_wsp mais l'épaisseur mesurée XH1_dmg du feuillard (12) en aval de l'emprise (20) qui est comparée (39) à la valeur de consigne (WH1).
  10. Procédé selon la revendication 8 ou la revendication 9, dans lequel le résultat de la comparaison est transmis à un régulateur, notamment un régulateur PI (40), qui influe sur le positionnement des cylindres de travail (19).
  11. Programme informatique pour calculateur, caractérisé en ce que ledit programme informatique est apte à mettre en oeuvre le procédé selon l'une des revendications 1 à 10.
  12. Mémoire pour calculateur sur laquelle est enregistré un programme informatique apte à mettre en oeuvre le procédé selon l'une des revendications 1 à 10.
  13. Calculateur numérique avec programme informatique apte à mettre en oeuvre le procédé selon l'une des revendications 1 à 10.
  14. Train de laminage (10) avec circuit électronique apte à mettre en oeuvre le procédé selon l'une quelconque des revendications 1 à 10.
  15. Train de laminage (10) selon la revendication 14, dans lequel est prévu un calculateur numérique apte à mettre en oeuvre le procédé selon l'une quelconque des revendications 1 à 10.
EP10000661A 2009-03-10 2010-01-22 Procédé destiné au fonctionnement d'un train de laminage, en particulier d'une installation de laminage à froid Active EP2228148B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009012028A DE102009012028A1 (de) 2009-03-10 2009-03-10 Verfahren zum Betreiben einer Walzstraße insbesondere eines Kaltwalzwerkes

Publications (2)

Publication Number Publication Date
EP2228148A1 EP2228148A1 (fr) 2010-09-15
EP2228148B1 true EP2228148B1 (fr) 2012-08-22

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US (1) US8381559B2 (fr)
EP (1) EP2228148B1 (fr)
DE (1) DE102009012028A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10799924B2 (en) 2017-08-01 2020-10-13 Sms Group Gmbh Mass flow regulation in roller devices
CN107999537B (zh) * 2018-01-17 2023-06-20 般若涅利（北京）装备技术有限公司 一种抑制辊压后电池极片厚度反弹的装置及相应的方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3636743A (en) 1970-06-15 1972-01-25 Allegheny Ludlum Ind Inc Rolling mill control system
JPS6096320A (ja) 1983-10-28 1985-05-29 Nippon Steel Corp 冷間圧延機の自動板厚制御方法
DE4141742A1 (de) 1991-12-13 1993-06-17 Licentia Gmbh Verfahren zur dickenregelung von bandfoermigem walzmaterial in bandstrassen
DE10254178B4 (de) 2002-11-21 2011-10-13 Abb Ag Verfahren zur Ermittlung von Zustandsgrößen eines Walzprozesses
EP2087948B1 (fr) * 2006-11-20 2013-09-25 Mitsubishi-Hitachi Metals Machinery, Inc. Matériel de production de matériau laminé à froid et procédé de laminage à froid
DE102008007057A1 (de) * 2008-01-31 2009-08-13 Siemens Aktiengesellschaft Regelverfahren für eine Kaltwalzstraße mit vollständiger Massenflussregelung

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EP2228148A1 (fr) 2010-09-15
US8381559B2 (en) 2013-02-26
DE102009012028A1 (de) 2010-09-23
US20100229612A1 (en) 2010-09-16

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