EP4204166B1 - Dispositif de mesure de planéité, laminoir à chaud et procédé d'actionnement d'un dispositif de mesure de planéité - Google Patents

Dispositif de mesure de planéité, laminoir à chaud et procédé d'actionnement d'un dispositif de mesure de planéité Download PDF

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Publication number
EP4204166B1
EP4204166B1 EP21762430.3A EP21762430A EP4204166B1 EP 4204166 B1 EP4204166 B1 EP 4204166B1 EP 21762430 A EP21762430 A EP 21762430A EP 4204166 B1 EP4204166 B1 EP 4204166B1
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EP
European Patent Office
Prior art keywords
deflecting roller
hot strip
measuring device
deflection roller
strip
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EP21762430.3A
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German (de)
English (en)
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EP4204166A1 (fr
EP4204166C0 (fr
Inventor
Frank Gorgels
Olaf Norman Jepsen
Patrick SIEMANN
Andreas Kastner
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SMS Group GmbH
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SMS Group GmbH
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Publication of EP4204166C0 publication Critical patent/EP4204166C0/fr
Publication of EP4204166B1 publication Critical patent/EP4204166B1/fr
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    • 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
    • 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
    • B21B37/68—Camber or steering control for strip, sheets or plates, e.g. preventing meandering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2273/00—Path parameters
    • B21B2273/04—Lateral deviation, meandering, camber of product

Definitions

  • the invention relates to a flatness measuring device for measuring a flatness of a hot strip within a hot rolling mill, having at least one inlet-side deflection roller for contacting a first large side of the hot strip, at least one outlet-side deflection roller for contacting the first large side of the hot strip and at least one with respect to a strip running direction of the hot strip between the inlet side Deflection roller and the outlet-side deflection roller, which can be adjusted against a second large side of the hot strip opposite the first large side of the hot strip and serves as a flatness measuring roller.
  • the invention also relates to a hot rolling mill with at least one flatness measuring device.
  • the invention further relates to a method for operating a flatness measuring device for measuring a flatness of a hot strip within a hot rolling mill, wherein the flatness measuring device has at least one inlet-side deflection roller for contacting a first large side of the hot strip, at least one outlet-side deflection roller for contacting the first large side of the hot strip and at least one relative a strip running direction of the hot strip between the inlet-side deflection roller and the outlet-side deflection roller, which can be adjusted against a second large side of the hot strip opposite the first large side of the hot strip and serves as a flatness measuring roller.
  • a possible position for the measuring device used for this purpose is between the cooling section and a driver roller of the hot rolling mill. Since flatness measurement requires a wrap around a flatness measuring roller, which deflects the metal strip and can therefore also be referred to as a deflection roller in the sense of the present invention, the measuring roller must be immersed in the metal strip. As soon as the measuring roller is immersed in the metal strip, a configuration of three deflection rollers is created, namely an inlet-side roller table roller as a deflection roller, the measuring roller as a deflection roller and the outlet-side roller table roller as a deflection roller.
  • Convex deflection rollers and deflection rollers mounted on swivel frames are known from continuous processes for the treatment of metal strips, such as in continuous annealing furnaces and galvanizing lines.
  • the cambered deflection rollers lead to a centering effect due to the tension redistribution created by the cambering.
  • the swivel frames are controlled by a regulation that is based on a measured band center position.
  • JP 2012 206 132 A discloses a rolling mill having rolls that roll a rolled material, a winding roll disposed downstream of the rolls and winding up the rolled material, and a deflection roll that changes a feed direction of the rolling material rolled by the rolls to feed it to the winding roll lead.
  • a condition of surface defect generated in the rolled material wound on the winding roll is detected.
  • One end of the deflection roller is moved in a direction perpendicular to the central axis of the deflection roller based on the detected state of the surface defect, so that the generation of the surface defect can be suppressed.
  • EP 3 097 990 A1 discloses a cold rolling apparatus that heats a sequentially transferred steel sheet using a heater and sequentially cold-rolls the steel sheet after heating by using a cold rolling mill.
  • the cold rolling device includes a meander motion correcting device disposed on an upstream side of the heater in a transferring direction of the steel sheet and configured to correct a meander motion of the steel sheet transferred toward the heater.
  • the cold rolling device includes a meandering suppression device disposed between the heater and the cold rolling mill and configured to suppress meandering motion of the steel sheet associated with cold rolling of the steel sheet by using the cold rolling mill.
  • the cold rolling device includes a controller configured to control the meander movement correcting device to perform a meander movement correcting operation to correct the meander movement of the steel sheet transferred to the heater.
  • the control is set up, the meandering movement suppression device to perform a meandering suppression operation to suppress the meandering of the steel sheet associated with the cold rolling of the steel sheet.
  • the controller controls the meander motion suppression device to perform the meander motion suppression operation at a timing when the controller controls the meander motion correction device to perform the meander motion correction operation.
  • the EP 0906 797 A1 discloses a flatness measuring device and a method for operating a flatness measuring device for measuring a flatness of a hot strip within a hot rolling mill, wherein the flatness measuring device has at least one inlet-side deflection roller for contacting a first broad side of the hot strip, at least one outlet-side deflection roller for contacting the first broad side of the hot strip and at least one with respect to a strip running direction of the hot strip between the inlet-side deflection roller and the outlet-side deflection roller, which can be adjusted against a second broad side of the hot strip opposite the first broad side of the hot strip and serves as a flatness measuring roller.
  • DE 195 24 729 A1 discloses a device for rolling strips which have a non-uniform thickness and/or length distribution across their width.
  • the device has at least one control roller arranged on the inlet and/or outlet side of the rolling mill, which can be pivoted in its position relative to the strip, means for detecting the tension distribution across the width of the strip and a control device which, from the detected tension distribution, provides control signals for control devices Pivoting of the control roller is determined.
  • One object of the invention is to prevent a hot strip from running laterally in a hot rolling mill during a flatness measurement on the hot strip.
  • the detection device for detecting an actual position of the hot strip can be arranged close to the middle deflection roller.
  • the detection device for detecting an actual position of the hot strip can be arranged before or after the middle deflection roller.
  • the detection device for detecting an actual position of the hot strip is arranged directly on the middle deflection roller.
  • the detection device for detecting an actual position of the hot strip is preferably arranged no further than 1 m away from the middle deflection roller.
  • the detection device can be set up to determine the position of the hot strip from measured values of the flatness measurement and / or from tension measurement signals from load cells arranged under bearings of one of the deflection rollers.
  • the strip path becomes very unstable when the middle deflection roller used as a flatness measuring roller is immersed, so that the hot strip could easily run sideways.
  • This can be reliably prevented with the flatness measuring device according to the invention by influencing the strip run by varying the angle between the longitudinal central axis of the deflection roller connected to the adjusting device and the longitudinal axis of the flatness measuring device depending on the current deviation of the actual position of the hot strip from a predetermined target position of the hot strip or is corrected.
  • the application of the invention makes it possible in particular to check the strip center position when measuring flatness in the exit roller table of a hot rolling mill. Without the invention, the hot strips would move so much laterally during the flatness measuring process that the process would have to be stopped. This problem occurs particularly in the case of hot strips with a thin strip thickness. However, these hot strips are particularly interesting for flatness measurement.
  • a tensile stress distribution in the hot strip can be measured.
  • the lower broad side of the hot strip can in particular be a roller of a roller table, via which the rolled hot strip can be fed to the flatness measuring device.
  • the term “upper broadside” means the opposite mainside, i.e. H. the upper broad side of the hot strip.
  • the outlet-side deflection roller for contacting the first large side, for example the underside, of the hot strip can in particular be a roller table roller of a roller table, via which the hot strip measured with the flatness measuring device can be fed to a drive roller unit of the hot rolling mill in front of a reel of the hot rolling mill.
  • the middle deflection roller serves as a flatness measuring roller.
  • the middle deflection roller is arranged between the inlet-side deflection roller and the outlet-side deflection roller, in particular in a plan view of one of the large sides of the hot strip with respect to the strip running direction of the hot strip.
  • the middle deflection roller can be adjusted against the second large side, for example the top side, of the hot strip opposite the first large side of the hot strip.
  • the middle deflection roller is connected to an actuator for turning on the middle deflection roller and evaluation electronics for evaluating mechanical loads on the middle evaluation electronics.
  • the detection device for detecting the actual position of the hot strip can, for example, have at least one optical sensor, for example a camera.
  • the detection device can have evaluation electronics for processing signals from the optical sensor.
  • the Detection device can, for example, be set up to detect an actual position of a strip center of the hot strip as the actual position of the hot strip on the inlet side.
  • the adjusting device can, for example, be connected solely to the inlet-side deflection roller in order to be able to vary the position of this deflection roller according to the invention, whereby an inventive control and / or regulation of the actual position or strip center position of the hot strip can take place.
  • the inlet-side deflection roller can be pivoted, for example, in a horizontal plane in order to be able to vary the angle between the longitudinal center axis of the inlet-side deflection roller and the longitudinal axis of the flatness measuring device according to the invention.
  • the variation of the angle between the longitudinal central axis of the inlet-side deflection roller and the longitudinal axis of the flatness measuring device can correspond to a variation of an angle between the longitudinal central axis of the deflection roller and a longitudinal axis of the hot rolling system, the longitudinal axis of the hot rolling system being defined by two points, namely the center of a roll gap of the last Roll stand of the finishing train and the middle of a clamping gap of the drive roller unit in front of the reel.
  • the angle between the longitudinal central axis of the inlet-side deflection roller and the longitudinal axis of the flatness measuring device can, for example, be in a range of +/- 10 mm/m, preferably in a range of +/- 15 mm/m, particularly preferably in a range of +/- 50 mm/m, lie.
  • the adjusting device can be connected solely to the outlet-side deflection roller or the middle deflection roller in order to be able to move the respective deflection roller according to the invention for controlling and / or regulating the belt run.
  • the adjusting device can be connected to two of the deflection rollers or to all of the deflection rollers in order to be able to move the deflection rollers according to the invention to control and / or regulate the belt run.
  • they can be done using one common actuator of the adjustment device or with separate or own actuators of the adjustment device can be relocated individually.
  • the angle of the respective displaceable or pivotable deflection roller which can be varied according to the invention, is given between the longitudinal central axis of the respective deflection roller, which is oriented transversely to the strip running direction, and the longitudinal axis of the flatness measuring device which runs transversely to the deflection rollers, the longitudinal axis of the flatness measuring device being able to be identical to the longitudinal axis of the hot rolling mill.
  • the angle can in particular be in a horizontal plane.
  • the adjusting device can have at least one controller, by means of which the angle between the longitudinal central axis of the respective deflection roller and the longitudinal axis of the flatness measuring device can be varied depending on the deviation of the actual position of the hot strip from the predetermined target position of the hot strip.
  • the controller can have a center controller which is set up to determine a target value for a pivot position of the respective deflection roller from the deviation of the actual position of the hot strip from the specified target position of the hot strip or a corresponding difference between the actual position of the hot strip and the specified target position of the hot strip , by using which the strip running of the hot strip can be corrected.
  • the center controller can be designed as a PI controller.
  • the adjusting device is set up to determine an actual position of the deflection roller connected to the adjusting device, to determine a desired position of this deflection roller from the deviation of the actual position of the hot strip from the predetermined target position of the hot strip, and a target adjustment speed value for adjusting the angle between the longitudinal central axis of this deflection roller and the longitudinal axis of the flatness measuring device depending on a deviation of the actual position of this deflection roller from the target position of this deflection roller.
  • the adjusting device can have a swivel controller which is set up to determine an adjustment speed value from the deviation of the actual position of the deflection roller connected to the adjusting device from the target position of this deflection roller or a corresponding difference between the actual position of this deflection roller and the target position of this deflection roller which the strip run of the hot strip can be corrected.
  • the swivel controller can be designed as a pure P controller.
  • the adjusting device is set up to determine a speed of a sideways movement of the hot strip and to determine the target adjustment speed value depending on the speed of the sideways movement of the hot strip.
  • the adjusting device can have a differential controller which is set up to determine an additional value for the pivoting speed of the deflection roller connected to the adjusting device from the speed of the inlet-side sideways movement of the hot strip, whereby this additional value and the adjusting speed determined by the pivoting controller can be added up in order to achieve this To generate a target adjustment speed value for controlling an actuator of the adjustment device.
  • the adjusting device is set up to pivot the deflection roller connected to the adjusting device and/or at least one other deflection roller connected to the adjusting device in a plane which is arranged perpendicular to the longitudinal axis of the flatness measuring device, and to pivot the respective deflection roller in the plane depending on an angle value by which the angle between the longitudinal center axis of the respective deflection roller and the longitudinal axis of the flatness measuring device can be varied by means of the adjusting device.
  • the deflection roller for tape running control is varied by an angle between the longitudinal center axis of this deflection roller and the longitudinal axis of the flatness measuring device, the relatively small distance of this deflection roller from the middle deflection roller results in impairments to the flatness measurement due to a change in the geometry of the clamping of the hot strip in the flatness measuring device.
  • the deflection roller and / or at least one further deflection roller is pivoted or displaced in the plane arranged perpendicular to the longitudinal axis of the flatness measuring device, for example vertical, in such a way that the change in the geometry of the clamping of the hot strip in the flatness measuring device is balanced.
  • a length difference ⁇ l between the strip edges of the hot strip can be determined by means of the adjusting device due to a pivoting amount SB of the deflection roller, the longitudinal central axis of which is varied by an angle between the longitudinal central axis of this deflection roller and the longitudinal axis of the flatness measuring device.
  • a pivoting amount SM of the deflection roller used to compensate for the change in the clamping geometry can be determined in the vertical direction by means of the adjusting device, which leads to a minimization of the disturbance caused by the horizontal pivoting movement of the deflection roller, the longitudinal central axis of which is about the angle between the longitudinal central axis of this deflection roller and the longitudinal axis of the flatness measuring device is varied.
  • This swivel amount SM can be transferred and adjusted directly or via a ramp to an actuator of the adjusting device.
  • the connection between the pivoting amount SM and the pivoting amount SB can be established in such a way that the clamped length of the hot strip over the entire flatness measuring device on an operating-side strip edge is equal to that on the drive side.
  • the calculation of the relationship between the swivel amount SM and the swivel amount SB can be done offline and the relationship can be stored in the form of a table in the adjustment device.
  • the pivoting movement to compensate for the change in the geometry of the clamping of the hot strip in the flatness measuring device can be carried out solely with the inlet-side deflection roller, the outlet-side deflection roller or the middle deflection roller. Alternatively, this compensation can be done using two of the deflection rollers or all of the deflection rollers. To carry out the displacement of two or more deflection rollers, they can be displaced individually using a common actuator of the adjusting device or with separate or separate actuators of the adjusting device.
  • the deflection roller connected to the adjusting device is arranged to be displaceable about an axis of rotation running perpendicular to an incoming strip section of the hot strip, the axis of rotation passing through a center of the deflection roller connected to the adjusting device or offset from the center with respect to the longitudinal axis of this deflection roller this deflection roller is arranged.
  • the axis of rotation can be arranged in the middle of the respective deflection roller or offset to the operating side or the drive side.
  • the adjusting device has at least one electromechanical drive connected to the deflection roller connected to the adjusting device, for example Spindle drive, or at least one hydraulic actuating cylinder connected to this deflection roller.
  • the flatness measuring device has at least one holding frame on which the inlet-side deflection roller, the outlet-side deflection roller and / or the middle deflection roller are or are rotatably mounted, the adjusting device being connected to the respective deflection roller via the holding frame and the holding frame can be moved together with the respective deflection roller associated with it.
  • Two of the deflection rollers or all of the deflection rollers can also be mounted on the holding frame in order to be able to move these deflection rollers together to optimize the flatness measurement.
  • At least one deflection roller has a bale surface with increased roughness. In this way, the control effect of the respective deflection roller on the belt run can be improved.
  • At least one deflection roller has a wear-resistant bale coating.
  • the bale coating can be, for example, a ceramic coating, such as a tungsten carbide coating.
  • the detection device is arranged and set up to detect an actual position of the hot strip on the inlet side or an actual position of the hot strip on the outlet side.
  • An actual position of the hot strip on the inlet side is to be understood as meaning an actual position of the hot strip before the hot strip entering the flatness measuring device comes into contact with the deflection roller on the inlet side.
  • An actual position of the hot strip on the outlet side is to be understood as meaning an actual position of the hot strip after the hot strip leaving the flatness measuring device has been deflected by means of the deflection roller on the outlet side.
  • a hot rolling plant according to the invention has at least one flatness measuring device according to one of the above-mentioned configurations or a combination of at least two of these configurations with one another.
  • the advantages mentioned above with regard to the flatness measuring device are associated with the hot rolling mill.
  • a flatness measuring device for measuring a flatness of a hot strip within a hot rolling mill
  • the flatness measuring device having at least one inlet-side deflection roller for contacting a first large side of the hot strip, at least one outlet-side deflection roller for contacting the first large side of the hot strip and at least one with respect to a strip running direction of the hot strip between the inlet-side deflection roller and the outlet-side deflection roller, which can be adjusted against a second large side of the hot strip opposite the first large side of the hot strip and serves as a flatness measuring roller, an actual position of the hot strip is detected and an angle between a longitudinal central axis of at least one deflection roller and a longitudinal axis of the flatness measuring device running transversely to the deflection rollers varies depending on a deviation of the actual position of the hot strip from a predetermined target position of the hot strip.
  • the flatness measuring device can be used according to one of the above-mentioned embodiments or a combination of at least two of these embodiments together to carry out the method.
  • an actual position of the deflection roller is determined from the deviation of the actual position of the Hot strip determines a target position of this deflection roller from the predetermined target position of the hot strip and a target adjustment speed value for adjusting the angle between the longitudinal central axis of this deflection roller and the longitudinal axis of the flatness measuring device is determined depending on a deviation of the actual position of this deflection roller from the target position of this deflection roller.
  • a speed of a sideways movement of the hot strip is determined and the target adjustment speed value is determined depending on the speed of the sideways movement of the hot strip.
  • the deflection roller the position of which can be varied accordingly, or at least one other deflection roller is pivoted in a plane which is arranged perpendicular to the longitudinal axis of the flatness measuring device, the pivoting of the respective deflection roller in the plane being carried out as a function of an angular value, by which the angle between the longitudinal center axis of the respective deflection roller and the longitudinal axis of the flatness measuring device can be varied.
  • Figure 1A shows a schematic top view of an exemplary embodiment of a flatness measuring device 1 according to the invention for measuring a flatness of a hot strip 2 within a hot rolling mill, not shown.
  • the flatness measuring device 1 has an inlet-side deflection roller 3 for contacting a first large side in the form of an underside of the hot strip 2.
  • the inlet-side deflection roller 3 is part of an inlet-side roller table, of which two further guide rollers 4 are shown.
  • the inlet-side deflection roller 3 can have a bale surface with increased roughness.
  • the inlet-side deflection roller 3 can have a wear-resistant bale coating, not shown.
  • the flatness measuring device 1 has an outlet-side deflection roller 5 for contacting the first large side in the form of the underside of the hot strip 2.
  • the outlet-side deflection roller 5 is part of an outlet-side roller table, of which a further guide roller 4 is shown.
  • the outlet-side deflection roller 5 can have a bale surface with increased roughness. In addition, it can outlet-side deflection roller 5 have a wear-resistant bale coating, not shown.
  • the flatness measuring device 1 has a middle deflection roller 7 which is arranged with respect to a strip running direction 6 of the hot strip 2 between the inlet-side deflection roller 3 and the outlet-side deflection roller 5 and can be adjusted against a second large side opposite the first large side of the hot strip 2 in the form of an upper side of the hot strip 2.
  • the middle deflection roller 7 serves as a flatness measuring roller and can have a bale surface with increased roughness.
  • the middle deflection roller 7 can have a wear-resistant bale coating, not shown.
  • the flatness measuring device 1 has a detection device 8 for detecting an actual position of the hot strip 2.
  • the detection device 8 can have at least one optical sensor, not shown, for example a camera.
  • the flatness measuring device 1 also has an adjusting device 9 connected to the detection device 8, the inlet-side deflection roller 3 and the middle deflection roller 7.
  • the adjusting device 9 is set up to determine an angle ⁇ between a longitudinal central axis 10 of the inlet-side deflection roller 3 and a longitudinal axis 11 of the flatness measuring device 1, which runs transversely to the deflection rollers 3, 5 and 7, depending on a deviation of the actual position of the hot strip 2 from a predetermined target position of the hot strip 2 to vary.
  • the inlet-side deflection roller 3 is shown in two pivoting positions, once in solid lines and once in dashed lines, with the horizontal pivotability of the inlet-side deflection roller 3 being indicated by a double arrow 12.
  • the inlet-side deflection roller 3 is arranged to be displaceable about an axis of rotation (not shown) perpendicular to a band section of the hot strip 2 fed to the inlet-side deflection roller 3 and perpendicular to the plane of the drawing, the axis of rotation being relative the longitudinal axis 10 of the inlet-side deflection roller 3 is arranged offset from the center of the inlet-side deflection roller 3.
  • the adjusting device 9 has an electromechanical drive (not shown) connected to the inlet-side deflection roller 3 or a hydraulic actuating cylinder connected to the inlet-side deflection roller 3.
  • the adjusting device 9 is set up to determine an actual position of the inlet-side deflection roller 3, to determine a target position of the inlet-side deflection roller 3 from the deviation of the actual position of the hot strip 2 from the predetermined target position of the hot strip 2, and a target adjustment speed value for adjusting the angle ⁇ between the longitudinal central axis 10 the inlet-side deflection roller 3 and the longitudinal axis 11 of the flatness measuring device 1 depending on a deviation of the actual position of the inlet-side deflection roller 3 from the target position of the inlet-side deflection roller 3.
  • the adjusting device 9 is set up to determine a speed of a sideways movement of the hot strip 2 and to determine the target adjustment speed value depending on the speed of the sideways movement of the hot strip 2.
  • the adjusting device 9 is further set up to pivot the middle deflection roller 7 in a plane which is arranged perpendicular to the longitudinal axis 11 of the flatness measuring device 1 and perpendicular to the plane of the drawing.
  • the adjusting device 9 is set up to pivot the middle deflection roller 7 in the plane depending on an angle value by which the angle ⁇ between the longitudinal center axis 10 of the inlet-side deflection roller 3 and the longitudinal axis 11 of the flatness measuring device 1 can be varied by means of the adjusting device 9.
  • the flatness measuring device 1 can have a holding frame, not shown, on which the inlet-side deflection roller 3, the outlet-side deflection roller 5 and / or the middle deflection roller 7 are or are rotatably mounted, the Adjusting device 9 is connected via the holding frame to the respective deflection rollers 3, 5 and 7 or the deflection rollers 3, 5 and 7 and the holding frame can be moved together with the deflection rollers 3, 5 and 7 connected to it.
  • Figure 1B shows a schematic side view of the in Figure 1A shown flatness measuring device 1.
  • the vertical pivotability of the middle deflection roller 7 is shown, once in solid lines and once in dashed lines, the vertical pivotability of the middle deflection roller 7 being indicated by a double arrow 13.
  • FIG 2 shows a flowchart of an exemplary embodiment of a method according to the invention for operating a flatness measuring device for measuring the flatness of a hot strip within a hot rolling mill.
  • the flatness measuring device can be in accordance with the Figures 1A and 1B shown embodiment.
  • an actual position list of the hot strip is recorded. From the actual position List and a predetermined target position L target of the hot strip, a difference is formed by means of a subtractor D1 of the adjusting device, which is fed to a center controller M of the adjusting device of the flatness measuring device. Depending on the difference, the center controller M generates a target position P target of the deflection roller connected to the adjusting device, which optimizes the strip travel of the hot strip. In addition, an actual position P Ist of the deflection roller connected to the adjusting device is recorded.
  • a further difference is formed by means of a further subtractor D2 of the adjusting device, which is fed to a swivel controller S of the adjusting device of the flatness measuring device.
  • the swivel controller S Depending on the difference D2, the swivel controller S generates an adjustment speed value for adjusting the angle between the longitudinal center axis of the deflection roller connected to the adjustment device and the longitudinal axis of the flatness measuring device.
  • the means of the subtractor D1 generated difference is also fed to a differential controller D of the adjusting device, which determines a speed of a sideways movement of the hot strip and uses this speed to determine an additional value for the adjusting speed.
  • the adjustment speed value generated by the swivel controller S and the additional value generated by the differential controller D are added using an adder A of the adjusting device, resulting in a target adjustment speed value V Soll , which can be used to control actuators of the adjusting device.
  • an angle between a longitudinal central axis of the deflection roller connected to the adjusting device and a longitudinal axis of the flatness measuring device running transversely to the deflection rollers is varied depending on a deviation of the actual position List of the hot strip from a predetermined target position L Soll of the hot strip.
  • an actual position P Is of the deflection roller connected to the adjusting device is determined, from the deviation of the actual position List of the hot strip from the specified target position L Soil of the hot strip, a target position P Soll of the deflection roller connected to the adjusting device determined and a target adjustment speed additional value for adjusting the angle between the longitudinal center axis of the deflection roller connected to the adjusting device and the longitudinal axis of the flatness measuring device as a function of a deviation of the actual position P Is of this deflection roller from the target position P Soil of this deflection roller is determined.
  • a speed of a sideways movement of the hot strip is determined and the additional target adjustment speed value is determined depending on the speed of the sideways movement of the hot strip.
  • the deflection roller In order to compensate for a change in the geometry of the clamping of the hot strip in the flatness measuring device, which is caused by adjusting the deflection roller connected to the adjusting device, the deflection roller, the position of which can be varied accordingly, or another deflection roller of the flatness measuring device can be pivoted in a plane which is arranged perpendicular to the longitudinal axis of the flatness measuring device.
  • the pivoting of this deflection roller in the plane can be carried out depending on an angle value by which the angle between the longitudinal center axis of the deflection roller, the pivoting of which caused the change in geometry, and the longitudinal axis of the flatness measuring device can be varied.

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Claims (15)

  1. Dispositif de mesure de planéité (1) permettant de mesurer une planéité d'une bande à chaud (2) à l'intérieur d'une installation de laminage à chaud, présentant au moins un rouleau de renvoi côté entrée (3) pour la mise en contact d'un premier grand côté de la bande à chaud (2), au moins un rouleau de renvoi côté sortie (5) pour la mise en contact du premier grand côté de la bande à chaud (2) et au moins un rouleau de renvoi disposé entre le rouleau de renvoi côté entrée (3) et le rouleau de renvoi côté sortie (5) par rapport au sens de défilement (6) de la bande à chaud (2), contre un second grand côté de la bande à chaud (2) opposé au premier grand côté de la bande à chaud (2) et servant de rouleau de mesure de planéité, caractérisé par au moins un dispositif de détection (8) permettant de détecter une position réelle (List) de la bande à chaud (2) et au moins un dispositif de réglage (9) relié au dispositif de détection (8) et à au moins l'un des rouleaux de renvoi (3, 5, 7), qui est conçu pour faire varier un angle (α) entre un axe médian longitudinal (10) du rouleau de renvoi (3, 5, 7) respectivement reliée au dispositif de réglage (9) et un axe longitudinal (11) du dispositif de mesure de planéité (1) s'étendant transversalement par rapport aux rouleaux de renvoi (3, 5, 7), en fonction d'un écart entre la position réelle (List) de la bande à chaud (2) et une position cible prédéfinie (LSoll) de la bande à chaud (2).
  2. Dispositif de mesure de planéité (1) selon la revendication 1, caractérisé en ce que le dispositif de réglage (9) est conçu pour déterminer une position réelle (List) du rouleau de renvoi (3, 5, 7) respectivement relié au dispositif de réglage (9), déterminer, à partir de l'écart entre la position réelle (List) de la bande à chaud (2) et la position cible prédéfinie (LSoll) de la bande à chaud (2), une position cible (LSoll) de ce rouleau de renvoi (3, 5, 7) et déterminer une valeur cible de la vitesse de réglage (VSoll) pour régler l'angle (α) entre l'axe longitudinal médian (10) de ce rouleau de renvoi (3, 5, 7) et l'axe longitudinal (11) du dispositif de mesure de planéité (1) en fonction d'un écart entre la position réelle (List) de ce rouleau de renvoi (3, 5, 7) et la position cible (LSoll) de ce rouleau de renvoi (3, 5, 7).
  3. Dispositif de mesure de planéité (1) selon la revendication 2, caractérisé en ce que le dispositif de réglage (9) est agencé de manière à déterminer une vitesse d'un déplacement latéral de la bande à chaud (2) et déterminer la valeur cible de la vitesse de réglage (VSoll) en fonction de la vitesse du déplacement latéral de la bande à chaud (2).
  4. Dispositif de mesure de planéité (1) selon l'une des revendications 1 à 3, caractérisé en ce que le dispositif de réglage (9) est agencé de manière à faire pivoter le rouleau de renvoi (3, 5, 7) respectif relié au dispositif de réglage (9) et/ou au moins un autre rouleau de renvoi (3, 5, 7) dans un plan qui est perpendiculaire à l'axe longitudinal (11) du dispositif de mesure de planéité (1) et à faire pivoter le rouleau de renvoi (3, 5, 7) respectif dans le plan en fonction d'une valeur angulaire dont l'angle (α) entre l'axe médian longitudinal (10) du rouleau de renvoi (3, 5, 7) respectif et l'axe longitudinal (11) du dispositif de mesure de planéité (1) peut être varié au moyen du dispositif de réglage (9).
  5. Dispositif de mesure de planéité (1) selon l'une des revendications 1 à 4, caractérisé en ce que le rouleau de renvoi (3, 5, 7) relié respectivement au dispositif de réglage (9) est disposé de manière à pouvoir être déplacé autour d'un axe de rotation s'étendant perpendiculairement à une section de la bande à chaud (2) pouvant être amenée à ce rouleau de renvoi (3, 5, 7), l'axe de rotation passant par un centre de ce rouleau de renvoi (3, 5, 7) ou étant décalé par rapport à l'axe longitudinal (10) de ce rouleau de renvoi (3, 5, 7) par rapport au centre de ce rouleau de renvoi (3, 5, 7).
  6. Dispositif de mesure de planéité (1) selon l'une des revendications 1 à 5, caractérisé en ce que le dispositif de réglage (9) comporte au moins un entraînement électromécanique relié au rouleau de renvoi (3, 5, 7) respectif relié au dispositif de réglage (9) ou au moins un vérin de réglage hydraulique relié à ce rouleau de renvoi (3, 5, 7).
  7. Dispositif de mesure de planéité (1) selon l'une des revendications 1 à 6, caractérisé par au moins un cadre de support sur lequel le rouleau de renvoi côté entrée (3), le rouleau de renvoi côté sortie (5) et/ou le rouleau de renvoi intermédiaire (7) est ou sont montés à rotation, le dispositif de réglage (9) étant relié au rouleau de renvoi (3, 5, 7) respectif par l'intermédiaire du cadre de support et le cadre de support peut être déplacé conjointement avec le rouleau de renvoi (3, 5, 7) associé.
  8. Dispositif de mesure de planéité (1) selon l'une des revendications 1 à 7, caractérisé en ce qu'au moins un rouleau de renvoi (3, 5, 7) comporte une surface de balle présentant une rugosité accrue.
  9. Dispositif de mesure de planéité (1) selon l'une des revendications 1 à 8, caractérisé en ce qu'au moins un rouleau de renvoi (3, 5, 7) est doté d'un revêtement de balle résistant à l'usure.
  10. Dispositif de mesure de planéité (1) selon l'une des revendications 1 à 9, caractérisé en ce que le dispositif de détection (8) est agencé et réglé de manière à détecter une position réelle (List) côté entrée de la bande à chaud (2) ou une position réelle List) côté sortie de la bande à chaud (2).
  11. Installation de laminage à chaud dotée d'au moins un dispositif de mesure de planéité (1), caractérisée en ce que le dispositif de mesure de planéité (1) est conçu selon l'une des revendications 1 à 10.
  12. Procédé d'exploitation d'un dispositif de mesure de planéité (1) permettant de mesurer la planéité d'une bande à chaud (2) à l'intérieur d'une installation de laminage à chaud, le dispositif de mesure de planéité (1) comportant au moins un rouleau de renvoi côté entrée (3) pour la mise en contact d'un premier grand côté de la bande à chaud (2), au moins un rouleau de renvoi côté sortie (5) pour la mise en contact du premier grand côté de la bande à chaud (2) et au moins un rouleau de renvoi (5) disposé entre le rouleau de renvoi côté entrée (3) et le rouleau de renvoi côté sortie (5) par rapport au sens de défilement (6) de la bande à chaud (2), contre un second grand côté de la bande à chaud (2) opposé au premier grand côté de la bande à chaud (2) et servant de rouleau de mesure de planéité, caractérisé en ce qu'une position réelle (List) de la bande à chaud (2) est détectée et un angle (α) entre un axe médian longitudinal (10) d'au moins un rouleau de renvoi (3, 5, 7) et un axe longitudinal (11) du dispositif de mesure de planéité (1) s'étendant transversalement par rapport aux rouleaux de renvoi (3, 5, 7) varient en fonction d'un écart entre la position réelle (List) de la bande à chaud (2) et une position cible prédéfinie (LSoll) de la bande à chaud (2).
  13. Procédé selon la revendication 12, caractérisé en ce qu'on détermine une position réelle (List) du rouleau de renvoi (3, 5, 7), dont la position peut être modifiée en conséquence, une position cible (LSoll) de ce rouleau de renvoi (3, 5, 7) à partir de l'écart entre la position réelle (List) de la bande à chaud (2) et la position cible prédéfinie (LSoll) de la bande à chaud (2) et une valeur cible de la vitesse de réglage (VSoll) pour régler l'angle (α) entre l'axe longitudinal médian (10) de ce rouleau de renvoi (3, 5, 7) et l'axe longitudinal (11) du dispositif de mesure de planéité (1) en fonction d'un écart entre la position réelle (List) de ce rouleau de renvoi (3, 5, 7) et la position cible (LSoll) de ce rouleau de renvoi (3, 5, 7).
  14. Procédé selon la revendication 13, caractérisé en ce qu'on détermine une vitesse d'un déplacement latéral de la bande à chaud (2) et on détermine la valeur cible de la vitesse de réglage (VSoll) en fonction de la vitesse du déplacement latéral de la bande à chaud (2).
  15. Procédé selon l'une quelconque des revendications 12 à 14, caractérisé en ce que l'on fait pivoter le rouleau de renvoi (3, 5, 7), dont la position peut varier en conséquence, et/ou au moins une autre rouleau de renvoi (3, 5, 7) dans un plan qui est perpendiculaire à l'axe longitudinal (11) du dispositif de mesure de planéité (1), et le pivotement du rouleau de renvoi (3, 5, 7) respectif dans le plan est effectué en fonction d'une valeur angulaire dont l'angle (α) entre l'axe central longitudinal (10) du rouleau de renvoi (3, 5, 7) respective et l'axe longitudinal (11) du dispositif de mesure de planéité (1) peut être varié.
EP21762430.3A 2020-08-31 2021-08-12 Dispositif de mesure de planéité, laminoir à chaud et procédé d'actionnement d'un dispositif de mesure de planéité Active EP4204166B1 (fr)

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DE102020210970.2A DE102020210970A1 (de) 2020-08-31 2020-08-31 Planheitsmessvorrichtung, Warmwalzanlage und Verfahren zum Betreiben einer Planheitsmessvorrichtung
PCT/EP2021/072441 WO2022043069A1 (fr) 2020-08-31 2021-08-12 Dispositif de mesure de planéité, laminoir à chaud et procédé d'actionnement d'un dispositif de mesure de planéité

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GB8621102D0 (en) * 1986-09-01 1986-10-08 Davy Mckee Sheffield Hot strip mill
JPH0523723A (ja) * 1991-07-24 1993-02-02 Toshiba Corp 平坦度測定装置及びこの平坦度測定装置を用いた連続圧延機の制御装置
JP3091073B2 (ja) * 1994-03-18 2000-09-25 住友金属工業株式会社 ストリップの蛇行修正用ピンチロール、蛇行修正装置および蛇行修正方法
DE19524729A1 (de) 1995-07-07 1997-01-16 Sundwiger Eisen Maschinen Verfahren und Vorrichtung zum Walzen von Bändern mit über ihrer Breite ungleichförmige Dicken- und/oder Längenverteilung
US6128937A (en) * 1997-09-30 2000-10-10 Sms Schloemann-Siemag Aktiengesellschaft Method and installation for shaping metal strip in a hot strip rolling mill
JP2000061520A (ja) 1998-08-25 2000-02-29 Toshiba Corp 熱間圧延機の平坦度制御装置
JP2012206132A (ja) 2011-03-29 2012-10-25 Kobe Steel Ltd 圧延方法および圧延機
JP6020475B2 (ja) 2014-01-20 2016-11-02 Ｊｆｅスチール株式会社 冷間圧延設備
JP6020479B2 (ja) 2014-01-29 2016-11-02 Ｊｆｅスチール株式会社 冷間圧延設備および冷間圧延方法
JP6299682B2 (ja) 2015-06-23 2018-03-28 Ｊｆｅスチール株式会社 金属ストリップの蛇行制御方法及び蛇行制御装置
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EP4204166C0 (fr) 2024-02-21
US20230311182A1 (en) 2023-10-05
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JP2023539618A (ja) 2023-09-15
CN115989095A (zh) 2023-04-18
WO2022043069A1 (fr) 2022-03-03
DE102020210970A1 (de) 2022-03-03

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