EP3009205B1 - Prise en compte d'une vitesse de référence pour la détermination d'une vitesse de guidage - Google Patents

Prise en compte d'une vitesse de référence pour la détermination d'une vitesse de guidage Download PDF

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Publication number
EP3009205B1
EP3009205B1 EP14188795.0A EP14188795A EP3009205B1 EP 3009205 B1 EP3009205 B1 EP 3009205B1 EP 14188795 A EP14188795 A EP 14188795A EP 3009205 B1 EP3009205 B1 EP 3009205B1
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EP
European Patent Office
Prior art keywords
rolling
metal strip
control device
speed
operating method
Prior art date
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EP14188795.0A
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German (de)
English (en)
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EP3009205A1 (fr
Inventor
Klaus Dr. Weinzierl
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Primetals Technologies Germany GmbH
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Primetals Technologies Germany GmbH
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    • 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
    • B21B37/46—Roll speed or drive motor control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/20—Temperature
    • B21B2261/21—Temperature profile
    • 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
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • 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
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • 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
    • B21B38/006—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring temperature

Definitions

  • the present invention is further based on a computer program comprising machine code which can be executed by a control device for a rolling mill, wherein the processing of the machine code by the control device causes the control device to operate the rolling mill according to such an operating method.
  • the present invention is further based on a control device for a rolling mill, wherein the control device is programmed with such a computer program, so that the control device operates the rolling mill according to such an operating method.
  • the roughing train is used for thermodynamic rolling. Thereafter, the finished pre-bands are left on the roller table in front of the roughing road or between the roughing road and the finishing train for a certain period of time. After reaching a predetermined pre-strip temperature, the remaining stitches of the roughing mill are carried out or the pre-strip is led directly to the finishing train.
  • the pass plan calculation of the finishing train determines a guide speed or a Leit einsverlauf and the Stichab156 to transport the then finished rolled metal strip with a predetermined Endwalztemperatur and a predetermined thickness in the cooling section. In the cooling section, the metal strip is cooled by means of intensive cooling with a predetermined temperature gradient and then finally wound up in the coiler.
  • a major problem with the cooling of thick metal strips in the intensive cooling is the temperature difference that occurs between the surface of the metal strip and the inside of the metal strip.
  • the temperature difference can be several 100 ° C.
  • the (cold) metal near the surface forms bainite, while the metal inside usually remains ferritic.
  • the surface is significantly harder than the core of the metal strip. This is a desired effect.
  • the problem is that in the procedure used in the prior art, a large dispersion of the material properties arises, the reproducibility is therefore given only to a limited extent. Therefore, a relatively high proportion of metal strips does not maintain the desired reel temperatures neither during coiling nor does it have the desired material properties.
  • the reason for the different material properties lies in the different bainite parts of the steel at the surface and the different thicknesses of the purely ferritic core.
  • the reason for this is the rolling in the rolling stands of the rolling mill. Because depending on the temperature at which the pre-strip fed to the rolling stands of the rolling mill is, are determined by the control device different conduction velocities. This leads - even with the same final rolling temperature and the same coiler temperature - to different temporal cooling progressions in the cooling section.
  • thermodynamic rolling could not be calculated accurately enough or because the next slab was already pulled out of the oven and therefore must be pre-rolled, so that the lying of the already pre-rolled metal strip must be prematurely terminated ,
  • An operating method of the type mentioned is from the JP S63 168 211 A known.
  • model-based an expected temperature after rolling in the rolling stands determined.
  • the determined temperature is compared with a setpoint temperature range. If the detected temperature is outside the target temperature range, an intended rolling speed pattern is corrected.
  • the object of the present invention is to provide possibilities by means of which the proportion of metal strips which have the desired material properties can be increased - if possible to 100%.
  • an extent to which the control device takes into account the reference speed in the determination of the guide speed the control device is fixed or is specified by an operator of the rolling mill.
  • the optimum value for the extent for example, based on microstructural investigations of already rolled metal strips can be determined by applying different values of the extent on the rolling mill and then continue to use the value at which the lowest dispersion of the material properties has been obtained.
  • the conduction velocity is determined uniformly for the entire metal strip.
  • the guide speed is determined individually for individual sections of the metal strip.
  • the Reference speed be determined individually for the individual sections of the metal strip.
  • a determination of the conduction velocity as a function of the location of a particular portion of the metal strip - for example, the tape head - or as a function of time is possible.
  • the reference velocity may also be a function of the location of the particular section of the metal strip or time.
  • a so-called intensive cooling takes place in the cooling section.
  • the metal strip is cooled in the cooling section with standing under a pressure between 1.5 bar and 5.0 bar standing water.
  • control device causes the control device to operate the rolling mill in accordance with an operating method according to the invention.
  • control device for a rolling mill with the features of claim 9.
  • the control device is programmed with a computer program according to the invention, so that the control device operates the rolling mill according to an operating method according to the invention.
  • the control device operates the rolling mill in each case according to an operating method according to the invention.
  • FIG. 1 is a rolling mill for rolling a metal strip 1 as a finishing train 2 with downstream cooling section 3 and the cooling section 3 downstream coiler 4 is formed.
  • the cooling section 3 is thus arranged between the finishing train 2 and the coiler 4.
  • the finishing train 2 has a plurality of rolling stands 5, which are traversed by the metal strip 1 successively in a transport direction x.
  • the number of rolling stands 5 is in the rolling mill of FIG. 1 greater than 1. Usually it is 5, 6, 7 or 8.
  • the metal strip 1 is usually a steel strip.
  • the metal strip 1 is rolled.
  • Each rolling stand 5 of the finishing train 2 performs a single pass.
  • the metal strip 1 is cooled in the cooling section 3.
  • the metal strip 1 is cooled in the cooling section 3 with water, which is under a pressure p between 1.5 bar and 5.0 bar (so-called intensive cooling).
  • the metal strip 1 is reeled in the coiler 4.
  • FIG. 2 shows a possible alternative embodiment of the rolling mill for rolling a metal strip 1. Comparable elements are in FIG. 2 provided with the same reference numerals as in FIG. 1 , Again, the metal strip 1 is usually a steel strip.
  • the rolling mill is designed as Steckel mill 6.
  • the Steckel mill 6 generally has a single roll stand 5, in which the metal strip 1 reversing in several rolling passes is rolled. In individual cases, two rolling stands 5 may be present. Also in this case, however, the metal strip in the two stands 5 is reversibly rolled. On both sides of the roll stand 5 (or the rolling stands 5) is ever a Coilbox 7 available in which the metal strip 1 is reeled between the individual rolling passes.
  • a cooling section 3 connects. After the last pass, the metal strip 1 is not coiled in the coil box 7 between the roll stand 5 and the cooling section 3, but fed to the cooling section 3. There, the metal strip 1 is cooled after rolling. Also in the rolling mill of FIG. 2 For example, the metal strip 1 in the cooling section 3 is preferably cooled with water which is at a pressure p between 1.5 bar and 5.0 bar (so-called intensive cooling).
  • the cooling section 3 is arranged downstream of a reeling device 4. The cooling section 3 is therefore also in the embodiment of the rolling mill according to FIG. 2 between the rolling mill 5 and the coiler 4. As a rule, one of the two coil boxes 7 is furthermore arranged between the roll stand 5 and the cooling section 3.
  • the respective rolling mill has according to the FIG. 1 and 2 a control device 8.
  • the control device 8 is programmed with a computer program 9.
  • the computer program 9 can be supplied to the control device 8, for example via a data carrier 10, on which the computer program 9 is stored in (exclusively) machine-readable form-for example in electronic form.
  • the computer program 9 comprises machine code 11 which can be processed by the control device 8.
  • the execution of the machine code 11 by the control device 8 causes the control device 8 to operate the rolling mill in accordance with an operating method which will be explained in more detail below.
  • the processing of the machine code 11 by the control device 8 first causes the above explained in connection with the structural design of the rolling plants operation of the rolling mill, so the rolling of the metal strip 1 in the rolling stands 5 ( FIG. 1 ) or the roll stand 5 ( FIG. 2 ), the cooling of the metal strip 1 in the cooling section 3 after rolling and the coiling of the metal strip 1 after cooling in the cooling section. 3
  • the execution of the machine code 11 by the control device 8 furthermore causes the control device 8 to operate the rolling mill during rolling of the metal strip 1 and also during cooling of the metal strip 1 at a guide speed vL.
  • the guide speed vL is a speed, from which - possibly in conjunction with the set in the rolling mill stubs and trains - occurring within the rolling system transport speeds of the metal strip 1 and the respective corresponding roller peripheral speeds of the work rolls of the rolling stands 5 are clearly determined.
  • it may be a fictitious speed of the tape head or the rotational speed of the first rolling stand 5 of the finishing train 2 or the speed of the work rolls of the rolling stand 5 of the Steckel rolling mill 6 at the first rolling pass.
  • the guide speed vL can be defined, for example, as a function of the location of the tape head.
  • the guide speed vL is determined by the control device 8 before the metal strip 1 is rolled in the rolling stands 5 of the rolling mill.
  • the control device 8 determines the guide speed vL as shown in FIG. 1 and 2 based on a Istenergyinhalts E1 of the metal strip 1, a target energy content E2 * of the metal strip 1 and a reference speed vR.
  • the Istenergyinhalt E1 is related to a time prior to rolling of the metal strip 1 in the rolling stands 5.
  • the energy content E1 may be the temperature or the enthalpy of the metal strip 1 before rolling in the roll stands 5.
  • the energy content E1 can for example be determined by means of a measurement at a first temperature measuring point 12 or be given directly by this measurement.
  • this is the initial rolling temperature at which the metal strip 1 is fed to the finishing train 2 or the Steckel rolling mill 6.
  • the target energy content E 2 * of the metal strip 1 is based on a time after rolling of the metal strip 1 in the rolling stands 5, but before cooling of the metal strip 1 in the cooling section 3.
  • the desired energy content E2 * can be, for example, the temperature or the enthalpy of the metal strip 1 after rolling in the roll stands 5, analogous to the energy content E1.
  • the target energy content E2 * is determined according to the technological requirements as needed. In the case of a temperature is the final rolling temperature, with which the metal strip 1 is fed from the finishing train 2 and the Steckel mill 6 of the cooling section 3.
  • the target energy content E2 * is of the same type as the energy I1.
  • the energy content I1 is a temperature
  • the energy content E2 * is usually also a temperature.
  • the energy content E2 * is also an enthalpy. However, this is not necessary.
  • the reference speed vR is a meaningful value for the guide speed vL based on empirical values.
  • the control device 8 can determine the guide speed vL as follows: According to FIG. 3 the control device 8 implements a function block 13. By means of the function block 13, the control device 8 determines a pass schedule SP. As part of the function block 13, the control device 8 also sets a value for the associated guide speed vL. This value is - because it is only provisional and therefore not yet final - hereinafter referred to as scheduled guide speed and provided with the reference numeral vL '. Possible implementations of functional block 13 are well known to those skilled in the art.
  • the control device 8 also implements a model 14.
  • the model 14 is a model of the rolling stands 5 of the rolling mill.
  • the behavior of the metal strip 1 during rolling in the rolling stands 5 of the rolling mill is modeled.
  • the temporal evolution of the temperature or the enthalpy of the metal strip 1 can be determined.
  • the determined pass schedule SP and the set guide speed vL ' are fed to the model 14.
  • the model 14, the Istenergyinhalt E1 of the metal strip 1 is further supplied. Based on the Istenergyinhalt E1 determines the controller 8 by means of the model 14 an expected energy content E2E.
  • the energy content E2E is that energy content which is expected at the applied guide speed vL 'after rolling in the rolling stands 5 of the rolling mill in the metal strip 1.
  • the expected energy content E2E is of the same type as the target energy content E2 *.
  • the expected energy content E2E and the target energy content E2 * are either both times around temperatures or both times around enthalpies.
  • the control device 8 forms a target function Z.
  • n1 and n2 are positive - not necessarily natural - numbers. As a rule, the numbers n1 and n2 have the same value. However, this is not necessary. For example, the numbers n1 and n2 may both be 2.
  • a is a freely selectable weighting factor. The weighting factor a determines to what extent the deviation of the set guide speed vL 'from the reference speed vR is taken into account in the final determination of the guide speed vL.
  • Equation (1) can be solved in the simplest case as a scalar equation.
  • equation (1) may be applied as a functional over the location of a particular portion of the metal tape 1 - for example the tape head - or time.
  • tE is the time at which the band foot of the metal strip 1 expires from the last rolling stand 5 of the finishing train or last time out of the rolling stand 5 of the Steckel rolling mill 6.
  • the control device 8 checks whether the target function Z is already optimized, for example, is minimal or - with a suitable definition of the target function Z - is maximum. If this is not the case, the control device 8 returns to the function block 13. There, at least the scheduled guide speed vL 'is varied. If necessary, the stitch plan SP is also varied. Varying takes place with the aim of optimizing the objective function Z. If this is the case, however, the target function Z is already optimized, the control device 8 takes over in a function block 17, the last set guide speed vL '- ie the applied guide speed vL', in which the target function Z has its optimal value - as a guide speed vL , This value is therefore used as the guide speed vL.
  • FIG. 4 can the controller 8 - as an alternative to the procedure according to FIG. 3
  • determine the conduction velocity vL as follows:
  • FIG. 4 implements the controller 8 analogously to FIG. 3 Function block 13, model 14, and decision block 16.
  • These elements 13, 14, 16 are identical to those of FIG. 3 , However, the functional blocks 15 and 17 are replaced by functional blocks 18 and 19.
  • the control device 8 forms - analogous to the function block 15 - a target function Z.
  • the deviation of the expected energy content E2E from the target energy content E2 * of the metal strip 1 enters the target function Z of the function block 18.
  • the deviation of the set guide speed vL 'from the reference speed vR does not enter into the objective function Z of the function block 18.
  • n is a positive - not necessarily natural - number.
  • the number n may have the value 2.
  • equation (2) can alternatively be stated as a scalar equation or as a functional.
  • the control device 8 forms a linear combination of the set guide speed vL ', at which the target function Z has its optimum value, and the reference speed vR.
  • the guide speed vL 1 - a ⁇ vL ' + a ⁇ vR determined.
  • a is - as in Equation 1 - a freely selectable weighting factor.
  • the weighting factor a determines to what extent the deviation of the set guide speed vL 'from the reference speed vR is taken into account in the final determination of the guide speed vL.
  • the im Functional block 19 determined value takes over the control device 8 as a guide speed vL. This value is therefore used as the guide speed vL.
  • the weighting factor a of the control device 8 is fixed. This is in the FIG. 1 and 2 indicated that the weighting factor a is registered within the control device 8. Alternatively, it is possible that the weighting factor a of the control device 8 is predetermined by an operator 20. This too is in the FIG. 1 and 2 shown schematically. However, particularly preferred is a procedure which will be described below in connection with FIG. 5 is explained in more detail. In addition are the FIG. 1 and 2 to bring with.
  • the final rolling temperature T2 is the temperature that the metal strip 1 has after rolling but before cooling.
  • the final rolling temperature T2 can be determined by a measurement at a second temperature measuring station 21.
  • the second temperature measuring station 21 is as shown in the FIG. 1 and 2 On the output side of the rolling stands 5, but arranged in front of the cooling section 3.
  • the control device 8 it is necessary for the control device 8 to be supplied with a respective reel temperature T3.
  • the reel temperature T3 is the temperature that the metal strip 1 has after cooling in the cooling section 3.
  • the reel temperature T3 can be determined by a measurement at a third temperature measuring station 22.
  • the third temperature measuring station 22 is as shown in the FIG. 1 and 2 on the output side of the cooling section 3, but arranged in front of the coiler 4.
  • FIG. 5 takes the control device 8 in a step S1 against the detected Endwalztemperatur T2.
  • the step S1 is - of course - performed prior to cooling of the metal strip 1 in the cooling section 3.
  • the control device 8 determines, based on the respective final rolling temperature T2, by means of a model 23, an expected reel temperature T3E.
  • the model 23 is a model of the cooling section 3 of the rolling mill.
  • the model 23 are in a conventional manner according to FIG. 6
  • the temperature development and the phase development in the metal strip 1 are determined-as a rule by iteratively solving a heat conduction equation and a phase transformation equation.
  • the determination is made for the respective metal strip 1.
  • the final rolling temperature T2 of the respective metal strip 1 is used by the model 23 and (at least among other things) the expected reel temperature T3E for the respective metal strip 1 is determined.
  • the expected reel temperature T3E corresponds to the temperature that is expected for the respective metal strip 1 when entering the reeling device 4 and thus during reeling.
  • the step S2 can be carried out during the cooling of the respective metal strip 1 in the cooling section 3.
  • step S3 the control device 8 receives the detected reel temperature T3.
  • the step S3 is - of course - performed after cooling of the metal strip 1 in the cooling section 3.
  • a step S4 the control device 8 compares the expected reel temperature T3E with the respective actual reel temperature T3. Based on the comparison, the control device 8 determines a correction factor k for the model 23 of the cooling section 3.
  • the model 23 adapted due to the change in the correction factor k uses the control device 8 in the context of the subsequent metal strip 1, that is, in the renewed execution of the steps S1 to S4.
  • step S5 the controller 8 performs the weighting factor a.
  • the tracking takes place by evaluating the correction factors k as a function of the respective guide speeds vL and / or the respective final rolling temperatures T2. The tracking takes place in such a way that the influence of the guide speed vL and / or the final rolling temperature T2 on the correction factor k is minimized.
  • the procedure of FIG. 5 based on the following considerations: As part of the execution of the model 23 is usually first determined an average temperature over the strip thickness and determined on the basis of this temperature, the development of the phase components. Thus, in the context of the model 23, the message about the temperature is first carried out and then the phase development is determined. In reality, however, the phase development takes place individually according to the respective temperature at the respective location of the metal strip 1. Due to the preference of the averaging over the temperature before the phase development, the model 23, the microstructure which occurs during cooling of the metal strip 1 in the cooling section 3 in the metal strip 1, do not detect correctly. This systematic error is reflected in the correction factor k.
  • the guide speed vL determined uniformly for the entire metal strip 1 (or uniformly for the entire respective metal strip 1).
  • the reference speed vR is uniformly defined for the entire metal strip 1 or for the entire respective metal strip 1.
  • the conduction velocity vL - from the beginning as it is in the WO 2011/138 067 A2 is explained - is determined individually for individual sections 24 of the metal strip 1 and the respective metal strip 1.
  • the reference speed vR can be defined uniformly for the entire metal strip 1 or for the entire respective metal strip 1.
  • the reference speed vR is preferably as shown in FIG FIG.
  • the conduction velocity v L is determined as a function of the location of a specific portion of the metal strip 1 - for example, the tape head - or as a function of time.
  • the reference speed v R can alternatively be uniformly defined or else also be defined as a function of the location of the specific section of the metal strip 1 or as a function of time.
  • a metal strip 1 is rolled in a number of rolling stands 5 a rolling mill, then cooled in a cooling section 3 of the rolling mill and finally wound up in the coiler 4 of the rolling mill.
  • the cooling section 3 is arranged between the rolling stands 5 and a reeling device 4.
  • a control device 8 of the rolling mill determined before rolling of the metal strip 1 in the rolling stands 5 a guide speed vL for the rolling mill. It operates when rolling the metal strip 1, the rolling mill according to the determined guide speed vL.
  • the control device 8 determines the guide speed vL on the basis of an energy content E1 of the metal strip 1 before rolling in the rolling stands 5, a desired energy content E2 * of the metal strip 1 after rolling in the rolling stands 5 and a reference speed vR.
  • the present invention has many advantages. In particular, it is possible to roll and cool the metal strip 1 in such a way that it has reproducible material properties. Scatters due to different Istenergyinhalte E1 before rolling in the rolling stands 5 or due to different conduction velocities vL can be reduced. Furthermore, there is a more precise control of the cooling section 3, because the correction factors k of the cooling section 3 scatter less than in the prior art. This results in a further reduction in the dispersion of the material properties. Downtime due to cold metal bands 1, which can not be rewound or jump when transporting the reeled metal strip 1 due to excessive voltages can be reduced or even avoided altogether.
  • the operating method can be realized in a simple manner and on any rolling mill. The operating method is not only suitable for the production of so-called pipe tape, but also for other steel grades. In many cases, the economic production of the grades X70 and X80 is enabled by the operating method according to the invention.

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Claims (10)

  1. Procédé de fonctionnement pour un laminoir destiné au laminage d'une bande métallique (1),
    - la bande métallique (1) étant laminée dans une pluralité de cages de laminoir (5) du laminoir, puis étant refroidie dans une voie de refroidissement (3) du laminoir située entre les cages de laminoir (5) et un dispositif dévidoir (4) du laminoir et, finalement, enroulée dans le dispositif dévidoir (4),
    - un dispositif de commande (8) du laminoir déterminant une vitesse de guidage (vL) pour le laminoir avant le laminage de la bande métallique (1) dans les cages de laminoir (5) et faisant fonctionner le laminoir conformément à la vitesse de guidage (vL) déterminée lors du laminage de la bande métallique (1), le procédé étant caractérisé en ce que :
    - le dispositif de commande (8) détermine la vitesse de guidage (vL) à l'aide d'un contenu énergétique réel (E1) de la bande métallique (1) avant le laminage dans les cages de laminoir (5), d'un contenu énergétique théorique (E2*) de la bande métallique (1) après le laminage dans les cages de laminoir (5) et d'une vitesse de référence (vR),
    - le dispositif de commande (8) détermine un contenu énergétique escompté (E2E) au moyen d'un modèle (15) des cages de laminoir (5) du laminoir à partir du contenu énergétique réel (E1) de la bande métallique (1) avant le laminage dans les cages de laminoir (5), lequel contenu énergétique escompté est attendu après le laminage dans les cages de laminoir (5) pour une vitesse de guidage fixée (vL'),
    - le dispositif de commande (8) optimise une fonction cible (Z), dans laquelle l'écart entre le contenu énergétique escompté (E2E) et le contenu énergétique théorique (E2*) de la bande métallique (1) après le laminage dans les cages de laminoir (5) intervient, en faisant varier la vitesse de guidage fixée (vL'),
    - soit un écart entre la vitesse de guidage fixée (vL') et la vitesse de référence (vR) intervient également, en plus, dans la fonction cible (Z) et le dispositif de commande (8) utilise en tant que vitesse de guidage (vL) la vitesse de guidage fixée (vL') avec laquelle la fonction cible (Z) prend sa valeur optimale,
    - soit la fonction cible (Z) est indépendante de l'écart entre la vitesse de guidage fixée (vL') et la vitesse de référence (vR) et le dispositif de commande (8) utilise, en tant que vitesse de guidage (vL), une combinaison linéaire de la vitesse de guidage fixée (vL') avec laquelle la fonction cible (Z) prend sa valeur optimale et de la vitesse de référence (vR).
  2. Procédé de fonctionnement selon la revendication 1, caractérisé en ce qu'un degré (a) de prise en compte de la vitesse de référence (vR) par le dispositif de commande (8) lors de la détermination de la vitesse de guidage (vL) est alloué par défaut au dispositif de commande (8) ou est alloué par un opérateur (20) du laminoir.
  3. Procédé de fonctionnement selon la revendication 1, caractérisé en ce que
    - il est exécuté de manière répétée avec différentes bandes métalliques (1),
    - une température de laminage finale (T2) respective présentée par la bande métallique (1) respective après le laminage, mais avant le refroidissement, est amenée au dispositif de commande (8),
    - le dispositif de commande (8) détermine à chaque fois pour la bande métallique (1) respective, à partir de la température de laminage finale (T2) respective, au moyen d'un modèle (23) de la voie de refroidissement (3) du laminoir, une température de bobinage escomptée (T3E) qui est attendue pour la bande métallique (1) respective lors du bobinage,
    - le dispositif de commande (8) compare à chaque fois la température de bobinage escomptée (T3E) à une température de bobinage effective (T3) respective et détermine un facteur de correction (k) pour le modèle (23) de la voie de refroidissement (3) en se basant sur la comparaison, et
    - le dispositif de commande (8) ajuste le degré (a), en évaluant les facteurs de correction (k) en fonction des vitesses de guidage (vL) respectives et/ou des températures de laminage finales (T2) respectives, de façon que l'influence de la vitesse de guidage (vL) et/ou de la température de laminage finale (T2) sur le facteur de correction (k) soit réduite à un minimum.
  4. Procédé de fonctionnement selon l'une des revendications 1 à 3, caractérisé en ce que la vitesse de guidage (vL) est déterminée de manière homogène pour l'ensemble de la bande métallique (1).
  5. Procédé de fonctionnement selon l'une des revendications 1 à 3, caractérisé en ce que la vitesse de guidage (vL) est déterminée de manière individuelle pour des sections individuelles (24) de la bande métallique (1).
  6. Procédé de fonctionnement selon la revendication 5, caractérisé en ce que la vitesse de référence (vR) est déterminée de manière individuelle pour les sections individuelles (24) de la bande métallique (1).
  7. Procédé de fonctionnement selon l'une des revendications précédentes, caractérisé en ce que la bande métallique (1) est refroidie dans la voie de refroidissement (3) avec de l'eau sous une pression (p) comprise entre 1,5 bar et 5,0 bar.
  8. Programme d'ordinateur qui comprend un code machine (11) qui peut être pris en charge par un dispositif de commande (8) pour un laminoir, la prise en charge du code machine (11) par le dispositif de commande (8) ayant pour résultat que le dispositif de commande (8) fait fonctionner le laminoir conformément à un procédé de fonctionnement selon l'une des revendications précédentes.
  9. Dispositif de commande pour un laminoir, le dispositif de commande étant programmé avec un programme d'ordinateur (9) selon la revendication 10, de façon que le dispositif de commande fasse fonctionner le laminoir conformément à un procédé de fonctionnement selon l'une des revendications 1 à 7.
  10. Laminoir destiné au laminage d'une bande métallique (1),
    - le laminoir comprenant une pluralité de cages de laminoir (5) dans lesquelles la bande métallique (1) est laminée,
    - le laminoir comprenant une voie de refroidissement (3) dans laquelle la bande métallique (1) est refroidie après le laminage,
    - le laminoir comprenant un dispositif dévidoir (4) dans lequel la bande métallique (1) est enroulée après le refroidissement,
    - la voie de refroidissement (3) étant située entre les cages de laminoir (5) et le dispositif dévidoir (4),
    - le laminoir comprenant un dispositif de commande (8) qui fait fonctionner le laminoir conformément à un procédé de fonctionnement selon l'une des revendications 1 à 7.
EP14188795.0A 2014-10-14 2014-10-14 Prise en compte d'une vitesse de référence pour la détermination d'une vitesse de guidage Active EP3009205B1 (fr)

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EP14188795.0A EP3009205B1 (fr) 2014-10-14 2014-10-14 Prise en compte d'une vitesse de référence pour la détermination d'une vitesse de guidage

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EP3009205B1 true EP3009205B1 (fr) 2018-12-26

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63168211A (ja) * 1986-12-27 1988-07-12 Sumitomo Metal Ind Ltd 熱延プロセスにおける温度制御方法
JPH04197510A (ja) * 1990-11-28 1992-07-17 Nkk Corp 熱間圧延機の最適仕上温度制御方法
DE10110324A1 (de) * 2001-03-03 2002-09-05 Sms Demag Ag Verfahren zum Entzundern von Bändern
DE10321791A1 (de) * 2003-05-14 2004-12-30 Siemens Ag Verfahren zur Regelung der Temperatur eines Metallbandes, insbesondere in einer Fertigstraße zum Walzen von Metall-Warmband
EP2386365A1 (fr) 2010-05-06 2011-11-16 Siemens Aktiengesellschaft Méthode d'optimisation d'un processus de production biopharmaceutique

Non-Patent Citations (1)

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Title
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