EP1986795A1 - Procédé pour diminuer l'influence des excentricités de cylindres - Google Patents

Procédé pour diminuer l'influence des excentricités de cylindres

Info

Publication number
EP1986795A1
EP1986795A1 EP07703793A EP07703793A EP1986795A1 EP 1986795 A1 EP1986795 A1 EP 1986795A1 EP 07703793 A EP07703793 A EP 07703793A EP 07703793 A EP07703793 A EP 07703793A EP 1986795 A1 EP1986795 A1 EP 1986795A1
Authority
EP
European Patent Office
Prior art keywords
roll
eccentricities
process model
rolling
tensile force
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.)
Granted
Application number
EP07703793A
Other languages
German (de)
English (en)
Other versions
EP1986795B1 (fr
EP1986795B2 (fr
Inventor
Josef Hofbauer
Martin Niemann
Bernhard Weisshaar
Dietrich Wohld
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.)
Primetals Technologies Germany GmbH
Original Assignee
Siemens 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=37886246&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1986795(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Priority to PL07703793T priority Critical patent/PL1986795T3/pl
Publication of EP1986795A1 publication Critical patent/EP1986795A1/fr
Publication of EP1986795B1 publication Critical patent/EP1986795B1/fr
Application granted granted Critical
Publication of EP1986795B2 publication Critical patent/EP1986795B2/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/58—Roll-force control; Roll-gap control
    • B21B37/66—Roll eccentricity compensation systems
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2265/00—Forming parameters
    • B21B2265/02—Tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • B21B27/03—Sleeved rolls
    • B21B27/032—Rolls for sheets or strips
    • 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
    • B21B38/06—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring tension or compression
    • 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
    • B21B38/08—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-force
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/45—Scale remover or preventor
    • Y10T29/4517—Rolling deformation or deflection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49462—Gear making
    • Y10T29/49467—Gear shaping
    • Y10T29/49471—Roll forming
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49481—Wheel making
    • Y10T29/49492—Land wheel
    • Y10T29/49524—Rim making
    • Y10T29/49531—Roller forming
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5197—Multiple stations working strip material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5198—Continuous strip

Definitions

  • the invention relates to a method of suppressing the influence of roll eccentricities on the run-out thickness ei ⁇ nes rolled stock, which passes through a rolling stand, wherein Wal ⁇ zenexzentrizticianen using a process model are dent i and for the determination of a correction signal for at least one control device for an actuator ⁇ be considered member of the rolling mill.
  • EP 0170016 Bl describes a method of the ge ⁇ type mentioned, wherein the influence is compensated by roll eccentricities in the Position-or thickness control of roll stands, where the roll eccentricities on the basis of egg ner measurement of the rolling force to be identified in the roll stand.
  • oil pressure sensors are usually used, the measured values are significantly distorted by friction influences. This requires that there is no sufficient Reliable and effective suppression of the influence of roller eccentricities can be done with the help of the measuring instruments. More reliable and accurate measuring methods for the rolling force are too expensive and too expensive.
  • the object of the invention is to provide a method for suppressing the influence of roller eccentricities, which avoids the known from the prior art and in particular the disadvantages described above.
  • This object is achieved by a method for suppressing the influence of roll eccentricities on the outlet thickness of a rolling stock which passes through a roll stand, wherein roll eccentricities are identified using a process model and in the determination of a Cor ⁇ rectification signal for at least one control device for an actuator be taken into account of the rolling stand, wherein for identifying the Walzenexzentrizticianen the at least one process model measured values of the tensile force are fed before the mill stand.
  • a highly accurate identifi cation of ⁇ will roll eccentricities and thus allows a particularly reliable and efficient method for Un ⁇ suppression of the influence of roll provided. Since reliable measuring encoders for strip tensioning in rolling mills are provided anyway, the expense of installing additional encoders specifically for identifying roll eccentricities is also avoided.
  • the tensile force can be measured after the roll stand.
  • the process model and / or at least one additional model describes the transmission behavior from the setting position to the strip tension.
  • a model with observer structure can be used.
  • the dependence on the belt speed can be taken into account adaptively.
  • the process model describing at least the roll gap ⁇ and the rolls of the rolling stand is
  • an inlet thickness compensation of the measured values used for the identification of the roll eccentricities can take place.
  • 1 shows a rolling mill in connection with a control device with a process model
  • 2 shows a schematic representation of the observer principle used for identifying the roll eccentricities
  • FIG. 3 shows the coupling of the tension measurement to the process model
  • FIG. 4 shows an inlet thickness compensation for the measured values used.
  • a WaIz- train for rolling a rolled material 10 includes one or more such rolling stands 1 on. Before or after a roll stand 1, a further roll stand 1, a reel device, a cooling device and / or another device, eg for thermal and / or mechanical Walzgutbeein kgung and / or means for transporting the rolling stock 10 before ⁇ be seen.
  • the rolling stock 10 is preferably a band, a profile, a wire or a slab.
  • the rolled material 10 a metal strip, for example a steel band, a non-ferrous metal ⁇ band or an aluminum band.
  • a rolling stand 1 has at least one upper support roller 4 with a radius R 0 and at least one lower support roller 5 with a radius R n .
  • the roll stand 1 shown has Minim ⁇ least an upper work roll 2 and at least one lower work roll 3, wherein the diameter of a work roll 2 or 3 is usually smaller than the diameter of a supporting roller 4 and 5.
  • a hydraulic actuating device 7 which can be actuated via a control valve 6 is provided.
  • an electromechanical adjustment system can also be provided.
  • the adjusting device 7 and the Anstellsystem not shown serve to adjust the roller adjustment s.
  • the hydraulic adjustment is based on the scaffolding frames.
  • the elastic frame is symbolically represented by a spring with the spring constant C G.
  • the roll stand 1 is traversed by a rolling stock 10, wherein the thickness of the rolling stock 10 when passing through the roll gap with the aid of the work rolls 2, 3 from the inlet thickness h e is reduced to the outlet thickness h a .
  • the rolled stock 10, to an equivalent material defects with the spring constant C M is associated in the nip, runs at the speed v ⁇ Einlaufge SE in the nip, and leaves the roll gap ⁇ with the exit speed v SL.
  • the roll eccentricities of the upper back-up roll 4 and the lower back-up roll 5, respectively, may be due to uneven roll wear, deformation due to thermal stresses, and / or the deviations of the geometric cylinder axis of the rolls from the operationally-setting rotation axes.
  • the roll eccentricities are .DELTA.R with O or .DELTA.R U, ie as deviations from the ideal backup roll radius R 0 or R u denotes.
  • the measurement of the rolling speed n o or n u of the upper and lower support rollers 4 and 5 is used to determine the fundamental vibration of Walzenexzentrizticianen. Under the simplifying conditions that the upper and lower rollers of the roll stand 1 rotate at the same speed, it is sufficient to detect the speed of only one driven roller, eg the lower work roll 3, by means of a tachometer 11.
  • the measured speed of the work roll 2 or 3 is determined by the ratio of the diameter of the work roll 2 or 3 Diameter of the support roller 4 or 5 in the speed n o or n u of the support roller 4 and 5 converted.
  • the speeds of the upper rollers 4, 2 and the lower rollers 5, 3 are different due to slightly different diameter, is in the shown
  • Embodiment both a tachometer 13 above the rolling stock 10 and a tachometer 11 below the Rolled material 10, each with a downstream conversion unit 14 or 12 for detecting the speed n o or n u provided.
  • the roll adjustment s is measured with a position sensor 9 on the adjusting device 7 or on the positioning system.
  • the roller adjustment s is fed to a control device 18.
  • the control device 18 is supplied with at least one roller speed n o or n u .
  • a Buchmessvorrich- device 8 for measuring the tensile force F z is provided in front of the roll stand 1.
  • the Buchmessvoriques 8, as indicated in FIG 1, have a measuring roller for tension measurement. This measuring roller may preferably be formed segmented.
  • the Switzerlandmess ⁇ device 8 may also be designed as a non-contact Buchmess- device.
  • a corresponding device for non-contact measurement of the tensile force F z in a rolling stock formed as a metal strip is described for example in DE 198 39 286 B4.
  • the control device 18 has a process model 27.
  • the process model 27 is based on an observer and models the behavior of the roll gap and the rolls.
  • the process model 27 is frequency-controlled with the aid of the WaIz speed, ie, for example, with the aid of the determined roller speeds n o or n u .
  • the time course of about model ⁇ lierenden interference is indeed periodic but not purely sinusoidal. This means that the vibration to be modeled consists of a fundamental vibration and several harmonics.
  • sinusoidal correction target values assigned to the eccentricity frequencies are calculated for an actuator of the roll stand 1 with the appropriate phase position and amplitude for the position of the roll gap control. Advertising
  • the correction reference values may have a tax advantage ⁇ direction 19 and possibly via a control valve 6 provided to the adjusting device 7 or to a screwdown the.
  • the required strip thickness, ie, the exit thickness h a of the rolled stock 10 by means of the control device 18 is extremely uniform a ⁇ are provided. Thickness deviations caused by the roller eccentricity ⁇ R O or ⁇ R U can thus be avoided.
  • a thickness gauge 16 By means of a thickness gauge 16 the thickness of, for example, the off-running ⁇ thickness h a, are measured, alternatively or additionally to ⁇ the rolled stock 10.
  • a desired value s * of the Anstellpo ⁇ position both a real process 29, as it runs, for example, in one of a rolling stock 10 continuous rolling stand 1 ( see FIG 1), as well as an observer module 30 supplied.
  • the observer module 30 has a process model 27, with the aid of which roll eccentricities can be identified and with the aid of which the identified roll eccentricities AR 1 can be provided for compensation purposes.
  • an identified outlet thickness h ai can preferably be determined, which can be linked to the measured tensile force F z to determine an observer error e.
  • the measured tensile force F z is first supplied to a module 21 in the measuring channel, which takes into account the transmission behavior of the outlet thickness to the strip tension inverse. With the aid of the module 21, the measured value of the tensile force F z is thus converted to the outlet thickness and compared with the identified run-out thickness h ai determined using the process model 27. The resulting from this comparison is the eighth error Obs ⁇ e.
  • the states of the process model 27 are un ⁇ ter consideration of the observer error e as long as cor- yaws, join to measurement and model at least substantially over ⁇ and the observer error e is sufficiently small or zero. Then the ed in the process model 27 identifi ⁇ roll eccentricities AR 1 match existing roll eccentricities with the fact in the rolling stand 1 (see FIG 1). The identified roller eccentricities AR 1 thus determined by the observation module 30 enable extremely reliable and accurate eccentricity compensation.
  • a selection can be made as to whether the process model 27 should take into account the outlet thickness h a , the rolling force F w or the tensile force F z in the identification of roll eccentricities.
  • FIG. 3 shows by way of example how the transfer behavior from the setting position to the strip tension can be taken into account when using the tensile force F z for identifying and suppressing roll eccentricities.
  • a module 21 hen vorgese ⁇ which up to the strip tension inversely taken into account the transmission characteristics of the outlet thickness.
  • the measured values of the tensile force F z are linked to the corresponding transfer function H Anlagen . This can be done, for example, by multiplication with a factor which corresponds to the inverse transfer function H Switzerland .
  • an adaptation circuit may be provided which takes into account the dependence on the belt speed v B.
  • the present at the output of the module 21 value that was determined with the aid of the tensile force F z is theificatmo ⁇ supplied dell 27th
  • the process model 27 preferably simulates the behavior of the process 29 from the setting position s or from the setpoint value s * of the setting position to the outlet thickness h a . If, alternatively or in addition to the tensile force F z, the rolling force F w is to be taken into account in the process model 27, then it is expedient to provide a module 28 in the measuring channel of the rolling force F w , wel ⁇ ches having a suitable transmission characteristic.
  • FIG. 4 shows an example of the use of an inlet thickness compensation in connection with the method according to the invention.
  • a Dickenmessgeber 17 is provided in front of the roll stand, by means of which a measured inlet thickness h em is detected.
  • the shown inlet thickness compensation module 22 has a tape tracking module 23.
  • the measured inlet thickness h em is traced to the mill stand 1.
  • V SE is a wegv adoptedte inlet thickness h ev determined.
  • the tape tracking module 23 preferably operates model-based.
  • the inlet thickness compensation module 22 has at least one compensation model 24, 25, 26 with the aid of which the influence of the inlet thickness h e on the outlet thickness h a is determined as a function of the measured variable m E or the corresponding measured value , Since the quality of the run-in thickness compensation substantially from the one or more compensation models used 24, 25, depends 26, in the illustrated example, a compensation model 24 for the USAGE ⁇ extension of the exit thickness h a as a measured variable m E, a compensation modeil 25 for use of the rolling force F w as a measured variable m E and a compensation model 24 for the use of the train ⁇ force F z as the measured variable m E provided.
  • the compensation signal given by the inlet thickness compensation module 22 is linked to the corresponding measured value of the measured variable m E to form a compensated measured variable m K.
  • the invention relates to a method for suppressing the
  • the information contained in the tensile force fluctuation and roll eccentricity caused by the perio ⁇ sized vibration components are specifically used to reduce the exzent ⁇ rizticians memorien, undesired change in thickness in the rolling stock 10th On fluctuation parts with other frequencies not equal to the eccentricity frequencies is not reacted.
  • the tension regulators present in known control concepts of a rolling train designed, for example, as a tandem mill can only be used at low rolling speeds and only at the front stands Avoid a part of the thickness caused by the eccentricities.
  • An inventively designed control device 18 for suppressing the influence of rolling eccentricities, which is fed to the rolling stock 10 measured tensile force F z can take on a rolling ⁇ scaffold 1, the compensation of the eccentricity frequencies and thus completely relieve conventional tension regulator.

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

Abstract

L'invention concerne un procédé pour diminuer l'influence des excentricités de cylindres sur l'épaisseur de sortie (h<SUB>a</SUB>) d'un produit laminé (10) qui traverse une cage de laminage (1). Les excentricités des cylindres sont identifiées en recourant à un modèle de processus (27). On tient compte de ces excentricités lors de la détermination d'un signal de correction d'au moins un organe de réglage, et de préférence d'un organe de réglage de la position initiale de la cage de laminage (1). Pour identifier les excentricités des cylindres, on amène dans le modèle de processus (27) la force de traction (F<SUB>z</SUB>) mesurée en amont de la cage de laminage (1). Selon l'invention, on renvoie de manière contrôlée les variations de la force de traction pour réduire les effets d'excentricités périodiques des cylindres sur le produit laminé (10), mais on exclut toutes les autres sources de variation. Un modèle de processus (27) de l'interstice entre les cylindres et des cylindres, basé de préférence sur le principe de l'observateur, fournit des données fiables sur l'excentricité des cylindres. On obtient ainsi de manière plus régulière que précédemment un produit laminé de dimensions prédéterminées.
EP07703793.5A 2006-02-22 2007-01-11 Procédé pour diminuer l'influence des excentricités de cylindres Active EP1986795B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07703793T PL1986795T3 (pl) 2006-02-22 2007-01-11 Sposób tłumienia wpływu mimośrodowości walców

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006008574A DE102006008574A1 (de) 2006-02-22 2006-02-22 Verfahren zur Unterdrückung des Einflusses von Walzenexzentrizitäten
PCT/EP2007/050248 WO2007096204A1 (fr) 2006-02-22 2007-01-11 Procede pour diminuer l'influence des exCENTRIcités dE cylindreS

Publications (3)

Publication Number Publication Date
EP1986795A1 true EP1986795A1 (fr) 2008-11-05
EP1986795B1 EP1986795B1 (fr) 2013-09-18
EP1986795B2 EP1986795B2 (fr) 2020-08-19

Family

ID=37886246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07703793.5A Active EP1986795B2 (fr) 2006-02-22 2007-01-11 Procédé pour diminuer l'influence des excentricités de cylindres

Country Status (8)

Country Link
US (1) US8386066B2 (fr)
EP (1) EP1986795B2 (fr)
CN (1) CN101443136B (fr)
DE (1) DE102006008574A1 (fr)
PL (1) PL1986795T3 (fr)
RU (1) RU2429925C2 (fr)
UA (1) UA95794C2 (fr)
WO (1) WO2007096204A1 (fr)

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EP3974073B1 (fr) * 2020-09-28 2023-07-19 Primetals Technologies Germany GmbH Laminage en fonction de la réponse de fréquence

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DE102008014304A1 (de) * 2008-03-14 2009-09-24 Siemens Aktiengesellschaft Betriebsverfahren für eine Kaltwalzstraße mit verbesserter Dynamik

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WO2007096204A1 (fr) 2007-08-30
UA95794C2 (ru) 2011-09-12
EP1986795B1 (fr) 2013-09-18
DE102006008574A1 (de) 2007-08-30
EP1986795B2 (fr) 2020-08-19
CN101443136B (zh) 2012-11-14
RU2429925C2 (ru) 2011-09-27
US8386066B2 (en) 2013-02-26
CN101443136A (zh) 2009-05-27
PL1986795T3 (pl) 2014-03-31
US20090210085A1 (en) 2009-08-20
RU2008137605A (ru) 2010-03-27

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