EP3632583A1 - Réglage découplé du contour et planéité d'une bande métallique - Google Patents

Réglage découplé du contour et planéité d'une bande métallique Download PDF

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Publication number
EP3632583A1
EP3632583A1 EP18198437.8A EP18198437A EP3632583A1 EP 3632583 A1 EP3632583 A1 EP 3632583A1 EP 18198437 A EP18198437 A EP 18198437A EP 3632583 A1 EP3632583 A1 EP 3632583A1
Authority
EP
European Patent Office
Prior art keywords
roll stand
control device
actuators
flatness
rolling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP18198437.8A
Other languages
German (de)
English (en)
Inventor
Klaus Loehe
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
Primetals Technologies Germany GmbH
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
Application filed by Primetals Technologies Germany GmbH filed Critical Primetals Technologies Germany GmbH
Priority to EP18198437.8A priority Critical patent/EP3632583A1/fr
Priority to US17/276,609 priority patent/US11213871B2/en
Priority to CN201980065087.1A priority patent/CN112752625B/zh
Priority to RU2021112565A priority patent/RU2771287C1/ru
Priority to PCT/EP2019/075161 priority patent/WO2020069875A1/fr
Priority to JP2021518500A priority patent/JP7155413B2/ja
Publication of EP3632583A1 publication Critical patent/EP3632583A1/fr
Withdrawn legal-status Critical Current

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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
    • B21B2263/00—Shape of product
    • B21B2263/02—Profile, e.g. of plate, hot strip, sections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2263/00—Shape of product
    • B21B2263/04—Flatness
    • 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 present invention is based on an operating method for a rolling mill with a plurality of roll stands, typically a multi-stand finishing mill, through which a metal strip, for example a steel strip, is sequentially passed.
  • the present invention is also based on a control program for a control device for a rolling mill, which has a plurality of roll stands which are sequentially traversed by a metal strip, the control program having machine code which can be processed by the control device, the processing of the machine code by the Control device causes the control device to control the rolling mill according to such an operating method.
  • the present invention is also based on a control device for a rolling mill, which has a plurality of roll stands which are sequentially traversed by a metal strip, the control device being programmed with such a control program, so that the control device controls the rolling mill in the operation of the rolling mill in accordance with such Controls operating procedures.
  • the rolled metal strip has a defined contour, for example is slightly curved, so that it is somewhat thicker in the middle of the strip than at the strip edges.
  • the rolled metal strip there is a desire for the rolled metal strip to be as free as possible from internal tensions, that is to say as flat as possible. For this reason, in the prior art, both the profile (or more generally the contour) and the flatness at a corresponding measuring station are usually measured and controlled behind the last stand of a rolling mill.
  • the flatness control acts on the rolling stand directly upstream of the measuring station, i.e. the last rolling stand on the rolling mill. It would be optimal if the contour control could also act on this roll stand.
  • the contour and flatness cannot be set independently of one another on a single roll stand. Because, in particular, both target variables are determined essentially by the shape of the roll gap of the relevant roll stand. In the prior art, the contour control therefore mostly acts on the front rolling stands of the rolling mill, in particular the first rolling stand on the rolling mill. This approach is based on the consideration that the metal strip in the front roll stands is even thicker and that a material cross flow is therefore possible.
  • the procedure of the prior art does not lead to a decoupled adjustment of the contour and Flatness. Rather, low-frequency vibrations occur.
  • the frequency of the vibration - based on the material flow - is determined by the amount of material of the metal strip that is located between the rearmost roll stand, which is controlled by the contour control, and the measuring station.
  • the contour can only be tracked very slowly, since the contour of the entire material located between the rearmost roll stand, which is controlled by the contour control, and the measuring station, can no longer be corrected.
  • the flatness control which can work with a considerably shorter dead time, repeatedly falsifies the measurement signal for the contour control.
  • the object of the present invention is to create possibilities by means of which flatness and contour can be set independently of one another in a multi-stand rolling mill.
  • the rear roll stand is usually the last roll stand on the rolling mill.
  • the front roll stand is usually the roll stand that is located directly in front of the rear roll stand.
  • the flatness and the contour are recorded using appropriate measuring devices.
  • Such measuring devices are known per se.
  • the flatness on the input side of the rear roll stand can also be set specifically and independently of the flatness and the contour on the output side of the rear roll stand.
  • This configuration enables an improved adjustment of the contour while at the same time reducing the resulting changes in flatness in front of the front or the further roll stand.
  • control device when determining the control of the actuators of the roll stand arranged upstream of the selected roll stand, has a lower control of the actuators of the selected roll stand Scope taken into account than would result from scaling according to the relative thickness of the metal strip of the roll stands involved. It can thereby be achieved that any changes in the flatness brought about by the procedure according to the invention are distributed over several intermediate stand areas in front of the selected rolling stand.
  • the sizes on which the rear flatness change to be made is based are the rear actual flatness and the rear target flatness or their difference.
  • the sizes on which the resulting change in setting is based are the rear flatness change to be made and the contour change to be made.
  • the control device preferably executes the operating method according to the invention in real time. So there is a direct integration into the control of the rolling mill.
  • control program with the features of claim 8.
  • processing of the control program by the control device causes the control device to control the rolling mill according to an operating method according to the invention.
  • control device with the features of claim 9.
  • the control device is programmed with a control program according to the invention, so that the control device controls the rolling mill during operation of the rolling mill according to an operating method according to the invention.
  • Control device designed as a control device according to the invention.
  • a metal strip 2 is rolled in a rolling mill 1.
  • the metal strip 2 is generally hot rolled in the rolling mill 1.
  • the rolling train 1 can be designed as a finishing train. In individual cases, however, cold rolling can also take place.
  • the rolling mill 1 has a plurality of roll stands 3, as shown in FIG FIG. 1 a total of six roll stands 3.
  • the roll stands 3 are in FIG. 1 and also supplemented with a small letter (a to f) in the other FIGs in order to be able to distinguish them from one another if necessary. Accordingly, the roll stands 3 are the first roll stand 3a, the second roll stand 3b, etc. up to the sixth and last roll stand 3f of the rolling mill 1.
  • the number of roll stands 3 could also be larger or smaller. It is crucial that at least two roll stands 3 are present and that the metal stands 2 pass through the roll stands 3 sequentially one after the other.
  • An associated transport direction is in FIG. 1 designated with x.
  • the term “to be run through sequentially” does not mean that the metal strip 2 is first completely rolled in one of the roll stands 3 and then completely rolled in the next of the roll stands 3. Rather, it is meant by the term that the metal strip 2 as a whole is rolled simultaneously in a plurality of roll stands 3, but that each individual section of the metal strip 2 passes through the roll stands 3 sequentially one after the other. Furthermore, in FIG. 1 and the other FIG always only the work rolls of the roll stands 3 shown. As a rule, the roll stands have 3 further rolls, in particular in the case of a configuration as a four-high stand backup rolls or in the case of a design as a sex stand back-up rolls and intermediate rolls.
  • the rolling mill 1 is controlled by a control device 4.
  • the control device 4 is generally designed as a software programmable control device.
  • the control device 4 is programmed with a control program 5.
  • the control program 5 has machine code 6, which can be processed by the control device 4.
  • the control device 4 processes the machine code 6.
  • the processing of the machine code 6 by the control device 4 has the effect that the control device 4 controls the rolling mill 1 according to an operating method which will be explained in more detail below.
  • FIG 2 first explains the basic principle of the present invention, then also in connection with FIG 2 a common design and then in connection with the 3 to 5 further refinements.
  • FIG 2 shows a front roll stand and a rear roll stand.
  • the front roll stand is - based on the two in FIG 2 Rolling stands 3 shown - that rolling stand 3 that is first passed through by the metal strip 2. Accordingly, - again based on the two in FIG 2 illustrated roll stands 3 - the rear roll stand that roll stand 3 that is last passed through by the metal strip 2.
  • it is as shown in FIG 2 in the rear roll stand around the last roll stand 3f of rolling mill 1 and in the front roll stand around the penultimate roll stand 3e of rolling mill 1.
  • reference number 3f is used below for the rear roll stand, reference number 3e for the front roll stand.
  • the front and rear roll stands do not have to be these two roll stands 3.
  • the front and rear roll stands 3e, 3f generally follow one another directly within the rolling mill 1.
  • the flatness change ⁇ F1 is known to the control device 4. The determination of the flatness change ⁇ F1 will be discussed later.
  • the flatness change ⁇ F1 is referred to below as the rear flatness change ⁇ F1 in order to be able to distinguish it linguistically from a front flatness change ⁇ F2 introduced later.
  • the flatness change ⁇ F1 the flatness of the metal strip 2 behind the rear roll stand 3f is to be changed.
  • the flatness change ⁇ F1 is fed to a node 7.
  • the control device 4 also knows a change in contour ⁇ C1.
  • the determination of the contour change ⁇ C1 will also be discussed later.
  • the contour change ⁇ C1 is referred to below as the rear contour change ⁇ C1 because, according to the contour change ⁇ C1, the contour of the metal strip 2 behind the rear roll stand 3f is to be changed.
  • the control device 4 first feeds the rear contour change ⁇ C1 to a first adaptation element 8.
  • the first adaptation element 8 takes into account the dynamic behavior of actuators 9 of the front roll stand 3e and of rear actuators 10 of the rear Roll stand 3f, in particular taking into account the ratio of these two dynamic behaviors.
  • the output signal of the first adaptation element 8 is fed to the node 7.
  • node 7 the two values supplied to node 7 are linked to one another by addition or subtraction.
  • the output signal is fed to the actuators 9 of the front roll stand 3e via a second adapter 11.
  • the ratio of the thickness of the metal strip 2 between the front and rear roll stands 3e, 3f to the thickness of the metal strip 2 behind the rear roll stand 3f is taken into account.
  • the control device 4 feeds the resulting change in setting for the front roll stand 3e to the actuators 9 of the front roll stand 3e. So it controls the actuators 9 of the front roll stand 3e accordingly. On the basis of the corresponding resulting control, a setting of the actuators 9 is changed in accordance with the resulting change in setting. As a result, the control device 4 thus determines the manipulated variables for the actuators 9 of the front roll stand 3e, taking into account the rear flatness change ⁇ F1 to be undertaken and additional consideration of the rear contour change ⁇ C1 to be undertaken.
  • the actuators 9 act on the roll gap of the front roll stand 3e.
  • the actuators 9 thereby influence both the flatness and the contour of the metal strip 2 running out of the front roll stand 3e.
  • the actuators 9 can be an actuator for asymmetrical wedge adjustment of the roll gap, an actuator for a roll bend, or an actuator for a roll entanglement, for an actuator for an axial displacement of rolls, for actuators for a location-dependent cooling or heating in the width direction of the metal strip 2 act of rollers or actuators for a location-dependent lubrication of rollers in the width direction of the metal strip 2.
  • Other actuators are also possible. The only exception is the symmetrical adjustment of the distance between the work rolls of the front roll stand 3e relative to one another over the width of the roll gap, that is to say the setting of the (average) strip thickness.
  • control device 4 controls according to the illustration in FIG FIG 2 also the actuators 10 of the rear roll stand 3f. A setting of the actuators 10 is changed accordingly.
  • the control device 4 determines the manipulated variables for the actuators 10 of the rear roll stand 3f, however, taking into account the rear contour change ⁇ C1 to be carried out. The rear flatness change ⁇ F1 is not taken into account.
  • the actuators 10 are not controlled directly, immediately and immediately, but via a delay element 12.
  • the delay element 12 delays the quantities supplied to it by a transport time T1, hereinafter referred to as the rear transport time.
  • the rear transport time T1 is the time during which a specific section of the metal strip 2 is conveyed from the front roll stand 3e to the rear roll stand 3f. It is therefore the time which elapses between the rolling of a specific section of the metal strip 2 in the front roll stand 3e and the rolling of the same section of the metal strip 2 in the rear roll stand 3f.
  • the transport time T1 is not necessarily a constant, but can be tracked dynamically at any time due to the sections of the metal strip 2 being tracked.
  • the control device 4 therefore - of course - also outputs control variables to the rear roll stand 3f at the point in time at which it outputs control values to the front roll stand 3e.
  • the manipulated variables output to the rear roll stand 3f at this point are, however, also to the Front roll stand 3e related output variables which have already been output to the front roll stand 3e at an earlier point in time.
  • the time difference is exactly the rear transport time T1.
  • the actuators 10 of the rear roll stand 3f act on the roll gap of the rear roll stand 3f.
  • the actuators 10 thereby influence both the flatness and the contour of the metal strip 2 running out of the rear roll stand 3f.
  • the actuators 10 can be designed and act in the same way as the actuators 9 of the front roll stand 3e.
  • a measuring device 13 is usually arranged downstream of the rear roll stand 3f, by means of which the contour C1, which the metal strip 2 has behind the rear roll stand 3f, is measured.
  • the contour C1 is referred to below as the rear actual contour.
  • a measuring device 14 is arranged downstream of the rear roll stand 3f, by means of which the flatness F1 which the metal strip 2 has behind the rear roll stand 3f is measured.
  • the flatness F1 is referred to below as the rear actual flatness.
  • Corresponding measuring devices 13, 14 are generally known to those skilled in the art.
  • the detected rear actual contour C1 and the detected rear actual flatness F1 are fed to the control device 4.
  • the control device 4 accepts these variables C1, F1.
  • the control device 4 implements a contour controller 15.
  • the control device 4 supplies the contour controller 15 with the detected rear actual contour C1 and a target contour C1 *.
  • the control device 4 uses the rear actual contour C1 and the target contour C1 * to determine the rear contour change ⁇ C1 to be carried out.
  • the manner in which the contour controller 15 determines the rear contour change ⁇ C1 to be carried out can be determined as required.
  • the contour controller 15 only carries out a simple profile regulation, that is to say regulation to one (scalar) profile value.
  • the contour controller 15 can in principle be designed as is also known in the prior art. However, other configurations are also possible.
  • the control device 4 also implements a rear flatness controller 16.
  • the control device 4 supplies the rear flatness controller 16 with the detected rear actual flatness F1 and a target flatness F1 *.
  • the target flatness F1 * is referred to below as the rear target flatness.
  • the control device 4 uses the rear actual flatness F1 and the rear desired flatness F1 * to determine the rear flatness change ⁇ F1 to be carried out.
  • the rear flatness controller 16 can in principle be designed as is also known in the prior art. However, other configurations are also possible.
  • FIG 3 a possible embodiment of the present invention explained. This configuration builds on the configuration of FIG 2 on. Therefore, only the additional elements are explained in more detail below.
  • the further measuring device 17 is arranged between the front roll stand 3e and the rear roll stand 3f.
  • the flatness F2 which the metal strip 2 has between the front roll stand 3e and the rear roll stand 3f is measured by means of the further measuring device 17.
  • the flatness F2 is referred to below as the front actual flatness to distinguish it from the rear actual flatness F1.
  • the detected front actual flatness F2 is also fed to the control device 4.
  • the control device 4 accepts the front actual flatness F2.
  • the control device 4 also implements a front flatness controller 18.
  • the front flatness controller 18 can be designed analogously to the rear flatness controller 16.
  • the control device 4 feeds the detected flat actual flatness F2 and a desired flatness F2 * to the front flatness controller 18.
  • the target flatness F2 * is referred to below as a front target flatness to distinguish it from the rear target flatness F1 *.
  • the control device 4 uses the front actual flatness F2 and the front desired flatness F2 * to determine a flatness change ⁇ F2 to be carried out, hereinafter referred to as the front flatness change.
  • the control device 4 controls according to the configuration FIG 3 furthermore also actuators 19 of a further roll stand 3 arranged upstream of the front roll stand 3e. As a rule, this is the roll stand directly upstream of the front roll stand 3e. For this reason, reference symbol 3d is used below for the further roll stand.
  • the control device 4 implements a third adaptation element 20 and a further node 21.
  • the control device 4 supplies the third adaptation element 20 with the output signal of the second adaptation element 11.
  • this signal takes into account both the rear flatness change ⁇ F1 to be made and the rear contour change ⁇ C1 to be made.
  • the third adapter 20 for example, the dynamic behavior of the actuators 19 of the further roll stand 3d and the actuators 9 of the front roll stand 3e can be taken into account, in particular the relationship of these two dynamic behaviors. This is even preferred.
  • the output signal of the third adaptation element 20 is fed to the further node 21.
  • the forward flatness change ⁇ F2 is also fed to the further node 21.
  • the two values supplied to the further node 21 are linked to one another by addition or subtraction.
  • the output signal of the further node 21 is fed to the actuators 19 of the further roll stand 3d via a fourth adaptation element 22 likewise implemented by the control device 4.
  • the fourth adapter 22 the ratio of the thickness of the metal strip 2 between the further and the front roll stand 3d, 3e to the thickness of the metal strip 2 between the front and the rear roll stand 3e, 3f is taken into account in particular.
  • the control device 4 thus determines the manipulated variables for the actuators 19 of the further roll stand 3d, taking into account both the flatness changes ⁇ F1, ⁇ F2 to be made and the rear contour change ⁇ C1 to be made.
  • the control device 4 feeds the resulting change in setting for the further roll stand 3d to the actuators 19 of the further roll stand 3d. It therefore controls the actuators 19 of the further roll stand 3d accordingly. On the basis of the corresponding resulting control, a setting of the actuators 19 is changed in accordance with the resulting change in setting.
  • the actuators 19 act on the roll gap of the further roll stand 3e.
  • the actuators 19 thereby influence both the flatness and the contour of the metal strip 2 running out of the further roll stand 3d.
  • the above statements regarding the actuators 9 of the front roll stand 3e can be used in an analogous manner.
  • the actuation of the actuators 9 of the front roll stand 3e compared to the actuation of the actuators 19 of the further roll stand 3d must be delayed by a transport time T2 in the context of the present invention.
  • the transportation time T2 is below called the front transportation time.
  • the front transport time T2 is the time which elapses between the rolling of a specific section of the metal strip 2 in the further roll stand 3d and the rolling of the same section of the metal strip 2 in the front roll stand 3e.
  • the control device 4 implements a further delay element 23, which is arranged downstream of the fourth adaptation element 21.
  • the actuators 19 of the further roll stand 3d are actuated via the further delay element 23.
  • the relative delay between the activation of the front roll stand 3e and the activation of the rear roll stand 3f is to be maintained unchanged. This can be achieved, for example, by adapting the delay time of the delay element 12 accordingly.
  • FIG 3 presented a different approach. With this procedure, the delay time of the delay element 12 has been retained unchanged, but an additional delay element 24 is present, in which the signal supplied to the rear roll stand 3f is delayed by the front transport time T2 in addition to the delay by the rear transport time T1.
  • FIG 4 a further possible embodiment of the present invention is explained. This configuration also builds on the configuration of FIG 2 on. Therefore, only the additional elements are explained in more detail below.
  • the control device 4 controls the control device 4 in the context of the operating method according to the invention additionally also the actuators 19 of the roll stand 3d, which is arranged upstream of the front roll stand 3e. A setting of the actuators 19 is changed accordingly.
  • the control device 4 determines actuation of the actuators 19 of the roll stand 3d upstream of the front roll stand 3e, taking into account the actuation of the actuators 9 of the front roll stand 3e.
  • the control device 4 preferably takes this proportion into account only to a lesser extent than would result from scaling according to the relative thickness of the metal strip 2 of the roll stands 3d, 3e involved.
  • the control device 4 outputs the manipulated variables for these actuators 19 without taking into account transport times T1, T2 between roll stands 3d, 3e, 3f to the actuators 19 of the upstream roll stand 3d.
  • FIG 4 The approach of FIG 4 is in principle also with the procedure of FIG 3 can be combined.
  • the roll stand 3d would take the place of the roll stand 3e
  • the roll stand 3c would take the place of the roll stand 3d.
  • this is done in conjunction with FIG 4 Pre-control explained starting from the foremost roll stand 3e, 3d, the transport time T1, T2 of which is taken into account in each case to the subsequent roll stand 3f, 3e as part of the control of the rear roll stand 3f.
  • FIG 5 a further possible embodiment of the present invention is explained.
  • This configuration also builds on the configuration of FIG 2 on. Therefore, only the additional elements of this embodiment are explained in more detail below. Furthermore, this configuration is also possible with each of the configurations according to FIGS FIG 3 and 4th can be combined.
  • the control device 4 determines the manipulated variables for the actuators 9, 10 and 19 of the roll stands 3e, 3f, 3d taking into account the effectiveness of the actuators 9, 10, 19 involved.
  • the front roll stand 3e will be discussed because it is within the scope the design of FIG 5 only depends on the front roll stand 3e.
  • the effectiveness of the actuators 9 can, for example, according to the representation in FIG 5 be summarized in an efficacy matrix M, the efficacy matrix M being supplied with the change of the roll gap contour to be set - in this case the roll gap contour of the front roll stand 3e - and the associated manipulated variables for the individual actuators 9 of the front roll stand 3e being determined by means of the effectiveness matrix M.
  • These manipulated variables are determined on the one hand on the basis of the rear flatness change ⁇ F1 to be carried out and the rear contour change ⁇ C1 to be carried out, because the roll gap contour to be set depends on precisely these variables ⁇ F1, ⁇ C1.
  • they are determined on the basis of the effectiveness matrix M and thus taking into account the effectiveness.
  • the actuators 9 are of course controlled by the control device 4 in accordance with the determined manipulated variables.
  • the control device 4 implements an identification device 25.
  • the control device 4 supplies the identification device 25 with the rear flatness change ⁇ F1 to be made.
  • the identification device 25 can also be used for the rear one Changes in flatness ⁇ F1 underlying parameters are fed, in particular the rear actual flatness F1 and the rear target flatness F1 * or their difference.
  • the control device 4 supplies the identification device 25 with the resulting change in the setting of the front roll stand 3e, that is to say the output signal from the second adaptation element 11.
  • the identification device 25 can also be supplied with parameters which are the basis for the change in the setting of the front roll stand 3e, in particular the rear flatness change ⁇ F1 and the rear contour change ⁇ C1 to be made.
  • the identification device 25 has a buffer memory 26.
  • the buffer memory 26 can be designed, for example, as a circulation memory or as a shift register.
  • the identification device 25 stores the quantities supplied to it for a period of time in the buffer memory 26. This period is at least as long as the sum of the rear transport time T1 and an additional transport time T0.
  • the additional transport time T0 is the time that elapses between the rolling of a specific section of the metal strip 2 in the rear roll stand 3f and the reaching of the measuring station, at which the rear actual flatness F1 is measured.
  • the identification device 25 also has a determination device 27.
  • the identification device 25 processes quantities that relate to the same section of the metal strip 2.
  • these are the rear flatness change ⁇ F1 to be carried out at a respective earlier point in time and the resulting change in setting of the front roll stand 3e determined for this.
  • this is also the rear flatness change ⁇ F1 to be carried out at a later point in time.
  • the difference between the later point in time and the earlier point in time is equal to the sum of the rear transport time T1 and the additional transport time T0.
  • the rear flatness change to be made later ⁇ F1 thus contains information about the extent to which the correction made at the earlier point in time by the resulting change in setting actually led to the rear flatness change ⁇ F1 determined for the earlier point in time. Based on this determination, the identification device 25 can therefore track the effectiveness of the actuators 9 of the front roll stand 3e.
  • the control device 4 accepts measured values at least for the rear actual flatness F1 and the rear actual contour C1. If necessary, the control device 4 also accepts further measured values in step S1, for example the front actual flatness F2. In a step S2, the control device 4 determines the rear flatness change ⁇ F1 and the contour change ⁇ C1. If necessary, the control device 4 also determines further flatness changes in step S2, for example the front flatness change ⁇ F2. In a step S3, the control device 4 controls the actuators of the roll stands 3. At least the actuators 9, 10 of the front and rear roll stands 3e, 3f are controlled by the control device 4 in the manner according to the invention.
  • control device can also control the actuators 19 of further roll stands 3d in a manner according to the invention in step S3.
  • the actuators 9 and 10 and possibly also 19 are actuated taking into account the relevant transport times T1, T2.
  • control device 4 can use the identification device 25 to track the effectiveness of the actuators 9 of the front roll stand 3e.
  • a cycle time T for the single execution of steps S1 to S4 can be in the range of a few milliseconds.
  • the control device 4 executes the operating method according to the invention in real time. It is a so-called level 1 automation.
  • the cycle time can also have larger values (up to several seconds).
  • the control device 4 can alternatively carry out the operating method according to the invention in the context of level 1 automation or in the context of level 2 automation. !!!
  • the present invention has many advantages.
  • the contour C1 and the flatness F1 can be set and regulated independently of one another on the outlet side of the rear roll stand 3f. Due to the decoupled control, the design and design of the contour controller 15 and the flatness controller 16 are further simplified. Furthermore, due to the fact that consideration of mutual couplings no longer has to be taken, the freedom in the controller design increases.
  • the programming of a control device of the prior art can easily be changed subsequently, so that the control device then acts according to the invention. An exchange of the control device as such, i.e. an exchange of the hardware, is not necessary.
EP18198437.8A 2018-10-03 2018-10-03 Réglage découplé du contour et planéité d'une bande métallique Withdrawn EP3632583A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP18198437.8A EP3632583A1 (fr) 2018-10-03 2018-10-03 Réglage découplé du contour et planéité d'une bande métallique
US17/276,609 US11213871B2 (en) 2018-10-03 2019-09-19 Decoupled adjustment of contour and flatness of a metal strip
CN201980065087.1A CN112752625B (zh) 2018-10-03 2019-09-19 金属带轮廓和平坦度的分开调整
RU2021112565A RU2771287C1 (ru) 2018-10-03 2019-09-19 Раздельная настройка контура и плоскостности металлической полосы
PCT/EP2019/075161 WO2020069875A1 (fr) 2018-10-03 2019-09-19 Réglage découplé du contour et de la planéité d'un ruban métallique
JP2021518500A JP7155413B2 (ja) 2018-10-03 2019-09-19 金属ストリップの輪郭および平坦性の分離調整

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US11623258B2 (en) 2020-01-24 2023-04-11 Primetals Technologies Germany Gmbh Frequency-dependent distribution of manipulated variables for changing the rolling stock cross section in a roll train

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Publication number Priority date Publication date Assignee Title
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US11213871B2 (en) 2022-01-04
JP7155413B2 (ja) 2022-10-18
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CN112752625A (zh) 2021-05-04
CN112752625B (zh) 2023-04-28
RU2771287C1 (ru) 2022-04-29
WO2020069875A1 (fr) 2020-04-09

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