EP1675694B1 - Procede et dispositif de commande pour faire fonctionner un train de laminoir pour bande metallique - Google Patents

Procede et dispositif de commande pour faire fonctionner un train de laminoir pour bande metallique Download PDF

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Publication number
EP1675694B1
EP1675694B1 EP04790153A EP04790153A EP1675694B1 EP 1675694 B1 EP1675694 B1 EP 1675694B1 EP 04790153 A EP04790153 A EP 04790153A EP 04790153 A EP04790153 A EP 04790153A EP 1675694 B1 EP1675694 B1 EP 1675694B1
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EP
European Patent Office
Prior art keywords
flatness
metal strip
bulge
visible
intrinsic
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 - Fee Related
Application number
EP04790153A
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German (de)
English (en)
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EP1675694A1 (fr
Inventor
Johannes Reinschke
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
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Siemens 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
    • B21B37/28—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
    • 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
    • B21B2001/225—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 by hot-rolling
    • 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
    • B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips

Definitions

  • the invention relates to a method according to the preamble of patent claim 1; an application is particularly suitable for operation in a hot rolling mill, e.g. in the finishing mill, but is not limited thereto.
  • the invention relates to a control device according to the preamble of patent claim 12.
  • a planarity control system for metal strip wherein a method of measuring the surface geometry of hot strip to create lines on the strip surface is used. The visible flatness thus measured is fed to a flatness control system via a flatness analysis system.
  • the object is achieved by a method of the aforementioned type, wherein for controlling the rolling stands by means of a buckling model values for the visible flatness in values for the intrinsic flatness is translated and the intrinsic flatness - as seen in material flow direction - is determined before a physical measuring location of the flatness by means of a material flow model.
  • the visible flatness is determined in the form of a bulge pattern.
  • the buckling pattern is technically easy comparable and storable with relatively little effort.
  • the bulge pattern is three-dimensional.
  • the metal strip in addition to the relative length of individual tracks of the metal strip evaluated at least one of the sizes wavelength, amplitude and phase offset of the individual tracks.
  • the bulge pattern can be detected much more accurately.
  • a multi-track laser measuring device is used to determine the bulge pattern, which enables cost-effective detection of the bulge pattern with sufficiently high precision.
  • the visible flatness is measured topometrically. In this way, areal detection of the strip surface structure and in particular of the bulge pattern becomes directly possible.
  • the translation of the plan is online.
  • a particularly exact control or regulation of the band flatness is made possible.
  • the translation of the flatness is carried out with the aid of an on-line capable approximation function.
  • on-line computing time can be saved in translating between visible and intrinsic flatness.
  • the bulge pattern is modeled by means of the buckling model by applying a fictitious temperature distribution in the transverse direction of the metal strip.
  • the thermal expansion in the belt longitudinal direction, but not in the transverse direction, corresponding to this belt temperature distribution, corresponds to a length distribution that can be assigned to the intrinsic flatness.
  • one or more flatness limit values are specified at freely selectable points within and / or after the rolling train for controlling the rolling train.
  • the flatness limits can be based on the intrinsic flatness and / or the refer to visible flatness. The fact that flatness limits can be specified anywhere within or after the rolling train, control accuracies for the rolling process can be significantly increased.
  • control device for operating a rolling train for metal strip with at least one rolling mill, wherein the control device for performing a method described above has at least one control unit which is coupled to a buckling model, which is provided with a device for measuring the visible flatness of Metal strip and coupled with a material flow model.
  • Advantageous embodiments of the control device are specified in subclaims. The advantages of the control device are analogous to those of the method.
  • a rolling train for rolling a metal strip 1 is controlled by a control computer 2.
  • the metal strip 1 can be, for example, a steel strip, an aluminum strip or a non-ferrous metal strip, in particular a copper strip.
  • the rolling train has at least two rolling stands 3.
  • the rolling stands 3 have at least work rolls 4 and, as indicated in FIG. 1 for one of the roll stands 3, as a rule also support rolls 5.
  • the rolling stands 3 could also have more rollers, for example, axially displaceable intermediate rollers.
  • the metal strip 1 passes through the rolling train in its longitudinal direction x, wherein the transverse direction y of the metal strip 1 is largely parallel to the axes of the work rolls 4.
  • the rolling train shown in Figure 1 is designed as a finishing train for hot rolling of steel strip. While the present invention is particularly suited for use in a multi-stand finishing line for hot rolling steel strip, it is not limited thereto; in particular, the rolling line may be formed as a cold rolling line (tandem mill) and / or rolling a non-ferrous metal (eg, aluminum , Copper or another non-ferrous metal) may be formed.
  • a cold rolling line tandem mill
  • a non-ferrous metal eg, aluminum , Copper or another non-ferrous metal
  • the control device 2 has a control unit 11. This in turn has a module 10 for profile and flatness control, which is coupled to a material flow model 9.
  • the control device 2 gives scaffold controllers 6 setpoints for profile and flatness actuators, not shown. The scaffold controllers 6 then adjust the actuators according to the predetermined setpoints.
  • the input variables supplied to the control device 2 include, for example, turn-key data such as an input thickness of the metal strip 1 and, for each rolling stand 3, a rolling force and a stitching decrease.
  • the input variables generally also include a final thickness, a nominal profile value, a nominal thickness contour and a desired flatness profile of the metal strip 1 at the outlet of the rolling train. Most of the rolled metal strip 1 should be as flat as possible.
  • the metal strip 1 has flatness errors, as shown by way of example and schematically in FIGS. 2a, 2b and 2c.
  • Flatness defects of the metal strip 1 can be measured at a location x2, as indicated in FIG. 1, for example by means of a multi-track laser measuring device 13.
  • Figure 2b shows a concentric bulge of the metal strip 1.
  • Figure 2b shows flatness defects at the edges of the metal strip 1.
  • Figure 2c shows bulges of the metal strip 1, which occur repeatedly in the longitudinal direction x of the metal strip 1, in particular in two areas in the transverse direction y of the metal strip 1.
  • the bulging of the metal strip 1 is caused in particular by internal stresses in the metal strip 1. Internal stresses in the metal strip 1 are also referred to as intrinsic band flatness ip.
  • FIG. 3 shows the division of a metal strip 1 into fictitious tracks S1 to Sn or into measurement tracks S1 'to Sm'. If one were to cut the metal strip 1 into narrow longitudinal strips or into tracks S1 to Sn, then one could measure an unequal band length distribution (the intrinsic strip length distribution) which is the cause of the internal stresses in the metal strip 1.
  • the multi-track laser measuring device 13 detects the relative length of the metal strip 1 per measuring track S1 'to Sm' and preferably additionally determines variables such as the wavelength, amplitude and / or the phase offset of the individual tracks S1 'to Sm'. It is crucial that for corresponding fictitious tracks S1 to Sn and measurement tracks S1 'to Sm', the associated intrinsic or measured relative lengths do not match.
  • the hot rolling of metal strip 1 distinguishes between intrinsic strip flatness ip and visible strip flatness vp.
  • the intrinsic band flatness ip denotes, as stated above, the Band length distribution over the tracks S1 to Sn.
  • the visible flatness vp results from the buckling behavior of the band, which is dependent, inter alia, on variables such as the strip thickness, the strip width, the modulus of elasticity of the metal strip 1 and the overall tension under which the metal strip 1 is located.
  • the visible flatness vp at a location x2 at the outlet of the rolling train, in particular a finishing train is measured and fed to a bulge model 12.
  • the measurement of the visible flatness vp takes place according to the invention such that not only the visible band length distribution over the bandwidth in the transverse direction y is the output of a measuring device, but the three-dimensional buckling pattern of the band can be reconstructed from the measuring device output variables. Accordingly, not only the (relative) length of the individual measuring tracks S1 'to Sm' but also the wavelength and phase offset for each track S1 'to Sm' are output by the measuring device in a multi-track laser measuring system.
  • a topometric flatness measurement is preferably based on a strip projection method. Strip patterns are projected onto the surface of the metal strip 1 and recorded continuously with the aid of a matrix camera.
  • the intrinsic flatness ip is preferably calculated at a location x1 between or after the rolling stands 3, in particular between and / or after the rolling stands 3 of a finishing train.
  • the calculation is preferably carried out by means of a material flow model 9 (see FIG. 1), which is preferably part of a control unit 11.
  • the intrinsic flatness ip calculated by the material flow model 9 can be compared ip with the aid of the bulge model 12 with the measured visible flatness vp.
  • a cold rolling mill would be in principle also a measurement of intrinsic flatness ip on the metal strip 1 possible.
  • the relationship between an intrinsic flatness ip between the rolling stands 3 and an intrinsic flatness ip after the last of the rolling stands 3 is established via the material flow model 9.
  • Input variables such as the strip thickness contours of the metal strip 1 and flatness courses or flatnesses before and after passing through a rolling stand 3 can be supplied to the material flow model 9.
  • the material flow model 9 determines online the intrinsic flatness profile of the metal strip 1 after passing through the roll stand 3 and a rolling force curve in the transverse direction y of the metal strip 1 and leads him to a roll deformation model, not shown.
  • the roll deformation model is not shown in detail part of a control unit 11.
  • the roll deformation model determines rolling deformations and leads them to a setpoint determiner, not shown, on the basis of the determined roller deformations and a scaffold-outlet contour of the metal strip 1, the setpoints for the profile and planarity actuators in each single roll stand 3 determined.
  • the material flow model 9 and the profile and flatness control implemented in the module 10 can be adapted to the measurement data of the visible flatness vp.
  • the visible flatness vp or for the corresponding visible band unevenness lower and upper bounds can be specified, which can be translated with the aid of the bulge model 12 into bounds for the intrinsic flatness ip or intrinsic unplanarity.
  • the bulge model 12 calculates the bulge pattern of the metal strip 1 from the intrinsic unevenness.
  • the visible bulge pattern can in turn be determined from the calculated buckling pattern.
  • inverse modeling is used.
  • the bulge model 12 is preferably based on the theory of elastic plate deformations.
  • the intrinsic flatness ip is modeled by applying a fictitious strip temperature distribution over the bandwidth, ie in the transverse direction y, which leads to a thermal expansion in the longitudinal direction x of the metal strip 1, namely the length distribution belonging to the intrinsic flatness ip.
  • the buckling model 12 can be used directly online.
  • an online-capable approximation function can be generated by means of an offline model, which is then used on-line for the bulge model 12.
  • the measured deflections of the metal strip 1, which are due to the buckling of the metal strip 1, usually have a much larger magnitude than the Strip thickness h. Typically, however, their magnitude is significantly less than both the typical wavelength of the buckling behavior and the bandwidth b. While the classical linear theory of plate deformation applies only when the deflections are less than or equal to about 1/5 of the strip thickness h, in the present case a non-linear description of plate distortions must be used.
  • E stands for the modulus of elasticity and ⁇ stands for the transverse contraction number of the metal strip 1.
  • L w ⁇ ⁇ : ⁇ 2 ⁇ w ⁇ x 2 ⁇ ⁇ 2 ⁇ ⁇ ⁇ y 2 - ⁇ 2 ⁇ w ⁇ y 2 ⁇ ⁇ 2 ⁇ ⁇ ⁇ x 2 - 2 ⁇ ⁇ 2 ⁇ w ⁇ x ⁇ y ⁇ ⁇ 2 ⁇ ⁇ ⁇ x ⁇ y
  • T denotes the temperature in the metal strip 1 and ⁇ x or ⁇ y the coefficient of thermal expansion in the longitudinal or transverse direction (x or y).
  • Equations (I) and (IV) form a system of two coupled, non-linear, partial differential equations. If you now use suitable boundary conditions such as free edges or periodic boundary conditions Head and foot of a band segment, the equations (I) and (IV) can be solved numerically in an iterative manner.
  • the invention relates to a method and a control device for operating a rolling train for metal strip 1, which has at least one rolling stand 3, wherein the intrinsic planarity ip of the metal strip 1 at the outlet of the rolling train is determined.
  • it is proposed to determine the visible flatness vp or buckling behavior of the metal strip 1 at the outlet of the rolling train or preferably to measure and a Beulmodells 12 in the intrinsic planarity ip of the metal strip 1 to translate.
  • the visible flatness can thus be used online with the aid of the Beulmodells 12 for controlling the rolling mills of the rolling mill.
  • the visible flatness vp according to the invention can preferably be better regulated online with the aid of the buckling model 12.
  • the buckling model 12 is online capable and establishes a one-to-one relationship between the absolute intrinsic flatness ip of the rolled metal strip 1 and the actually measured visual defects of the metal strip 1, ie the visible flatness vp. For the first time, the verification, adaptation and tuning of a matrix flow model 9 based on the intrinsic flatness or its corresponding profile and flatness control with respect to the actual measured values is made possible.

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

Claims (14)

  1. Procédé pour faire fonctionner un train de laminoir pour une bande de métal (1), qui comprend au moins une cage de laminoir (3), une planéité visible (vp) de la bande de métal (1) étant mesurée à la sortie du train de laminoir,
    caractérisé en ce que pour commander ladite au moins une cage de laminoir des valeurs pour la planéité visible (vp) sont transformées, au moyen d'un modèle de gondolement (12), en valeurs pour la planéité intrinsèque (ip), et la planéité intrinsèque (ip) est déterminée, au moyen d'un modèle de flux de matière (9), avant un lieu physique de mesure de la planéité.
  2. Procédé selon la revendication 1, caractérisé en ce que la planéité visible (vp) est déterminée sous la forme d'un gondolement type.
  3. Procédé selon la revendication 2, caractérisé en ce que le gondolement type est tridimensionnel.
  4. Procédé selon la revendication 2 ou 3, caractérisé en ce que pour la détermination du gondolement type, on exploite, en-dehors de la longueur relative de pistes individuelles (S1 à Sn) de la bande de métal (1), au moins l'une des grandeurs longueur d'onde, amplitude et déphasage des pistes individuelles (S1 à Sn)
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que pour déterminer la planéité intrinsèque (ip), on utilise un appareil de mesure à laser multipistes (13).
  6. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que la planéité visible (vp) est mesurée de manière topométrique.
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'au moyen du modèle de gondolement (12) des valeurs pour la planéité intrinsèque (ip) sont transformées en valeurs pour la planéité visible (vp).
  8. Procédé selon la revendication 7, caractérisé en ce que la transformation des planéités (ip respectivement vp) est effectuée en ligne.
  9. Procédé selon la revendication 7 ou 8, caractérisé en ce que la transformation des planéités (ip respectivement vp) est effectuée avec l'aide d'une fonction d'approximation exécutable en ligne.
  10. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'à partir de la planéité intrinsèque (ip) de la bande de métal (1), on détermine son gondolement type au moyen du modèle de gondolement (12), par application d'une répartition de température fictive dans la direction transversale (y) de la bande de métal (1).
  11. Procédé selon l'une des revendications précédentes, caractérisé en ce que pour commander le train de laminoir, on prescrit une ou plusieurs valeurs limites de planéité en des points pouvant être choisis librement.
  12. Dispositif de commande (2) pour faire fonctionner un train de laminoir pour une bande de métal (1), qui comprend au moins une cage de laminoir (3), le dispositif de commande (2) comprenant au moins une unité de régulation (11),
    caractérisé en ce que l'unité de régulation (11), pour la mise en oeuvre d'un procédé selon l'une des revendications précédentes, est couplée à un modèle de gondolement (12), qui est couplé à un dispositif pour mesurer la planéité visible (vp) de la bande de métal (1), et à un modèle de flux de matière (9).
  13. Dispositif de commande (2) selon la revendication 12, caractérisé en ce que le dispositif pour mesurer la planéité visible (vp) est un appareil de mesure à laser multipistes (13).
  14. Dispositif de commande (2) selon la revendication 12 ou 13, caractérisé en ce que le modèle de gondolement (12), pour la détermination d'un gondolement type de la bande de métal (1), est couplé à au moins un système de mesure topométrique.
EP04790153A 2003-10-06 2004-10-06 Procede et dispositif de commande pour faire fonctionner un train de laminoir pour bande metallique Expired - Fee Related EP1675694B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10346274A DE10346274A1 (de) 2003-10-06 2003-10-06 Verfahren und Steuervorrichtung zum Betrieb einer Walzstraße für Metallband
PCT/EP2004/011171 WO2005035156A1 (fr) 2003-10-06 2004-10-06 Procédé et dispositif de commande pour faire fonctionner un train de laminoir pour bande métallique

Publications (2)

Publication Number Publication Date
EP1675694A1 EP1675694A1 (fr) 2006-07-05
EP1675694B1 true EP1675694B1 (fr) 2007-12-12

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ID=34399272

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EP04790153A Expired - Fee Related EP1675694B1 (fr) 2003-10-06 2004-10-06 Procede et dispositif de commande pour faire fonctionner un train de laminoir pour bande metallique

Country Status (7)

Country Link
US (1) US20070006625A1 (fr)
EP (1) EP1675694B1 (fr)
JP (1) JP2007507354A (fr)
CN (1) CN100395044C (fr)
AT (1) ATE380607T1 (fr)
DE (2) DE10346274A1 (fr)
WO (1) WO2005035156A1 (fr)

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JP5708356B2 (ja) * 2011-08-08 2015-04-30 新日鐵住金株式会社 金属板の形状計測方法、形状計及び金属板の圧延方法
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EP2998040A1 (fr) * 2014-09-17 2016-03-23 Primetals Technologies Germany GmbH Réglage de largeur d'une ligne de fabrication
JP6631538B2 (ja) * 2014-12-09 2020-01-15 コニカミノルタ株式会社 検出チップおよび検出方法
CN108072640B (zh) * 2016-11-14 2020-01-07 清华大学 一种单分子检测装置以及单分子检测方法
CN107561052B (zh) * 2016-07-01 2020-04-28 清华大学 一种用于单分子检测的分子载体的制备方法
CN107561051A (zh) * 2016-07-01 2018-01-09 清华大学 一种用于单分子检测的分子载体
CN107561053B (zh) * 2016-07-01 2020-04-28 清华大学 一种单分子检测方法
CN109470676A (zh) * 2017-09-08 2019-03-15 清华大学 用于分子检测的分子载体
EP3599038A1 (fr) * 2018-07-25 2020-01-29 Primetals Technologies Austria GmbH Procédé et dispositif de détermination du contour de bande latéral d'une bande métallique en mouvement
EP3997249A1 (fr) * 2019-07-08 2022-05-18 Commonwealth Rolled Products, Inc. Procédés et systèmes de mesure de la planéité d'une tôle d'alliage d'aluminium dans un four de traitement thermique
EP3888810B1 (fr) * 2020-04-03 2023-08-02 ABB Schweiz AG Procédé de réglage de la planéité de bande de matériau laminé, système de commande et ligne de production
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Publication number Publication date
WO2005035156A1 (fr) 2005-04-21
US20070006625A1 (en) 2007-01-11
EP1675694A1 (fr) 2006-07-05
CN1863612A (zh) 2006-11-15
DE502004005723D1 (de) 2008-01-24
JP2007507354A (ja) 2007-03-29
DE10346274A1 (de) 2005-04-28
CN100395044C (zh) 2008-06-18
ATE380607T1 (de) 2007-12-15

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