EP4204166A1 - 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

Info

Publication number
EP4204166A1
EP4204166A1 EP21762430.3A EP21762430A EP4204166A1 EP 4204166 A1 EP4204166 A1 EP 4204166A1 EP 21762430 A EP21762430 A EP 21762430A EP 4204166 A1 EP4204166 A1 EP 4204166A1
Authority
EP
European Patent Office
Prior art keywords
deflection roller
hot strip
measuring device
hot
flatness measuring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP21762430.3A
Other languages
German (de)
English (en)
Other versions
EP4204166C0 (fr
EP4204166B1 (fr
Inventor
Frank Gorgels
Olaf Norman Jepsen
Patrick SIEMANN
Andreas Kastner
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.)
SMS Group GmbH
Original Assignee
SMS Group 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 SMS Group GmbH filed Critical SMS Group GmbH
Publication of EP4204166A1 publication Critical patent/EP4204166A1/fr
Application granted granted Critical
Publication of EP4204166C0 publication Critical patent/EP4204166C0/fr
Publication of EP4204166B1 publication Critical patent/EP4204166B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • 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 deflection roller on the outlet side, which can be set 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 relates to a hot rolling mill with at least one flatness measuring device.
  • the invention also relates to a method for operating 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 set 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 measuring device used When measuring flatness in a hot rolling mill for steel, one possible position for the measuring device used is between the cooling section and a driver roller of the hot rolling mill. Since the flatness measurement requires wrapping 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 entry-side roller table roller as a deflection roller, the measuring roller as a deflection roller and the exit-side roller table roller as a deflection roller.
  • Cambered deflection rollers and deflection rollers mounted on swivel frames are known from continuous processes for treating metal strips, such as in continuous annealing furnaces and galvanizing lines.
  • the cambered deflection rollers lead to a centering effect due to the redistribution of tensile stress caused by the cambering.
  • the swing frames are controlled by a closed-loop control based on a measured strip 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 the winding rolled material, and a deflection roller that changes a feeding direction of the rolled material that has been rolled by the rollers to guide it to the winding reel.
  • a state of a surface defect generated in the rolled material wound on the winding roll is detected.
  • One end of the deflector roller is moved in a direction perpendicular to the central axis of the deflector 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 which 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 facility includes a meandering correction device disposed on an upstream side of the heater in a transferring direction of the steel sheet and configured to correct a meandering of the steel sheet transferred toward the heater.
  • the cold rolling apparatus includes a meandering suppressing device disposed between the heater and the cold rolling mill and configured to suppress meandering of the steel sheet associated with cold rolling of the steel sheet through use of the cold rolling mill.
  • the cold rolling apparatus includes a controller configured to control the meander motion correcting device to perform a meander motion correcting operation to correct the meander motion of the steel sheet transferred to the heating device.
  • the controller is configured to control the meandering motion suppressing device to perform a meandering motion suppressing operation to suppress the meandering motion of the steel sheet associated with the cold rolling of the steel sheet.
  • the controller controls the meandering motion suppressing device to perform the meandering motion suppressing operation at a timing, when the controller controls the meandering motion correcting device to perform the meandering motion correcting operation.
  • DE 195 24 729 A1 discloses a device for rolling strips which have a non-uniform thickness and/or length distribution over their width.
  • the device has at least one control roller, which is arranged on the entry and/or exit side of the rolling mill and 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 tension distribution recorded, generates control signals for control devices for Pivoting of the control roller determined.
  • An object of the invention is to prevent a hot strip from running sideways 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 central 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 preferably arranged directly on the central 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 central 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 run Due to a large clamped length of the hot strip between a flatness measuring device and a finishing train of a hot rolling mill, the strip run becomes very unstable when the middle deflection roller used as a flatness measuring roller dips in, so that the hot strip could easily run sideways.
  • This can be reliably prevented with the flatness measuring device according to the invention by the strip run is influenced or corrected by varying the angle between the longitudinal center axis of the respective deflection roller connected to the adjustment device and the longitudinal axis of the flatness measuring device depending on the instantaneous deviation of the actual position of the hot strip from a specified target position of the hot strip.
  • the use of the invention makes it possible, in particular, to check the strip center position when measuring the flatness in the exit roller table of a hot rolling mill. Without the invention, the hot strips would run sideways to such an extent during the flatness measurement process that the process would have to be stopped. This problem occurs particularly in the case of hot strip with a small strip thickness. However, these hot strips are particularly interesting for
  • a tensile stress distribution in the hot strip can be measured.
  • the inlet-side deflection roller for contacting the first large side, for example the underside, i. H. 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 large side, i. H. the upper broadside, 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 role of a roller table be over which with the
  • Flatness measuring device measured hot strip can be fed to a pinch roller unit of the hot rolling mill in front of a coiler of the hot rolling mill.
  • the middle deflection roller serves as a flatness measuring roller.
  • the middle deflection roller is in particular in a plan view of one of the large sides of the hot strip with respect to the direction of strip travel of the hot strip between the inlet side Deflection roller and the outlet-side deflection roller arranged.
  • the middle deflection roller can be set against the second large side, for example the upper side, of the hot strip which is opposite the first large side of the hot strip.
  • the central deflection roller is connected to an actuator for adjusting the central deflection roller and evaluation electronics for evaluating mechanical loads on the central evaluation electronics.
  • the detection device for detecting the actual position of the hot strip can have, for example, 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 be set up, for example, 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 entry-side deflection roller in order to be able to vary the position of this deflection roller according to the invention, whereby the actual position or strip center position of the hot strip can be controlled and/or regulated according to the invention.
  • the inlet-side deflection roller can be pivoted in a horizontal plane, for example, 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 in the angle between the longitudinal center axis of the entry-side idler roller and the longitudinal axis of the flatness measuring device can correspond to a variation of an angle between the longitudinal center axis of the idler roller and a longitudinal axis of the hot rolling mill, the longitudinal axis of the hot rolling mill being defined by two points, namely the center of a nip of the last Roll stand of the finishing train and the center of a nip of the pinch roller unit in front of the coiler.
  • the angle between the longitudinal center axis of the inlet side idler roller and the longitudinal axis of the flatness measuring device can be, for example, in a range of +/-10 mm/m, preferably in a range of +/-15 mm/m, particularly preferably in a range of +/-50 mm/m.
  • the adjusting device can be connected solely to the outlet-side deflection roller or the central deflection roller in order to be able to shift the respective deflection roller for controlling and/or regulating the belt run according to the invention.
  • the adjusting device can be connected to two of the deflection rollers or to all deflection rollers in order to be able to shift the deflection rollers for controlling and/or regulating the running of the strip according to the invention.
  • they can be shifted individually by means of a common actuator of the adjusting device or with separate or separate actuators of the adjusting device.
  • the angle of the respective displaceable or pivotable deflection roller that can be varied according to the invention is given between the longitudinal center axis of the respective deflection roller, which is aligned transversely to the direction of strip travel, and the longitudinal axis of the flatness measuring device that runs transversely to the deflection rollers, it being possible for the longitudinal axis of the flatness measuring device to be identical to the longitudinal axis of the hot rolling mill.
  • the angle can lie in a horizontal plane.
  • the adjusting device can have at least one controller, by means of 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 depending on the deviation of the actual position of the hot strip from the specified target position of the hot strip.
  • the controller can have an average controller that is set up to determine a setpoint for a pivoting 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 whose Application of the strip run of the hot strip is correctable.
  • the middle controller can be designed as a PI controller.
  • the adjustment device is set up to determine an actual position of the respective deflection roller connected to the adjustment device, to determine a target position of this deflection roller from the deviation of the actual position of the hot strip from the specified target position of the hot strip, and a target adjustment speed value for adjusting the angle between the longitudinal center axis of this deflection roller and the longitudinal axis of the flatness measuring device as a function of a deviation of the actual position of this deflection roller from the target position of this deflection roller.
  • the adjustment speed at which the respective deflection roller is pivoted can be adapted quickly and individually to the current situation with regard to the running of the strip.
  • the adjustment 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 respective deflection roller connected to the adjustment 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 adjustment device is set up to determine a speed of a sideways movement of the hot strip and to determine the target adjustment speed value as a function of 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 swiveling speed of the deflection roller connected to the adjusting device from the speed of the sideways movement of the hot strip on the inlet side, this additional value and the adjusting speed determined by the swiveling controller can be added up in order to generate the setpoint displacement speed value for controlling an actuator of the displacement device.
  • the adjustment device is set up to pivot the respective deflection roller connected to the adjustment device and/or at least one other deflection roller connected to the adjustment device in a plane which is arranged perpendicularly to the longitudinal axis of the flatness measuring device, and to pivot the respective deflection roller to be carried out in the plane 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 by means of the adjusting device.
  • the inlet-side deflection roller for strip movement monitoring 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 between this deflection roller and the central deflection roller impairs 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, such that the change in the geometry of the clamping of the hot strip in the flatness measuring device is balanced.
  • a length difference AZ between the strip edges of the hot strip can be determined by means of the adjusting device based on a pivoting amount SB of the deflection roller, the longitudinal center axis of which is varied by an angle between the longitudinal center 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 disruption caused by the horizontal pivoting movement of the deflection roller, whose longitudinal center axis is rotated by the angle between the longitudinal center axis of this deflection roller and the longitudinal axis of the flatness measuring device is varied.
  • the relationship 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 operator-side strip edge is the same as that on the drive side.
  • the calculation of the relationship between the amount of pivoting SM and the amount of pivoting SB can take place offline and the relationship can be stored in the form of a table in the adjusting 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 pulleys or all pulleys. To carry out the shifting of two or more deflection rollers, they can be shifted individually by means of a common actuator of the adjusting device or with separate or dedicated actuators of the adjusting device.
  • the deflection roller connected to the adjustment device is arranged so that it can be displaced about an axis of rotation running perpendicular to an incoming strip section of the hot strip, the axis of rotation being offset through a center of the deflection roller connected to the adjustment device or 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 adjustment device has at least one electromechanical drive connected to the deflection roller connected to the adjustment device, for example a 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 is rotatably mounted, the adjustment device being connected to the respective deflection roller via the holding frame and the holding frame can be displaced together with the respectively associated deflection roller.
  • Two of the deflection rollers or all 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 ball surface with increased roughness.
  • the Deflection roller has a wear-resistant bale coating.
  • the Ball coating may be, for example, a ceramic coating such as a tungsten carbide coating.
  • the detection device is arranged and set up in such a way that it detects 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 exiting the flatness measuring device has been deflected by means of the deflection roller on the outlet side.
  • a hot rolling mill 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.
  • the advantages mentioned above in relation to the flatness measuring device are correspondingly associated with the hot rolling plant.
  • the 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, can be set 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 recorded and an angle between a longitudinal center axis of at least one deflection roller and one across the Deflection rollers running longitudinal axis of the flatness measuring device 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 configurations or a combination of at least two of these configurations together to carry out the method.
  • an actual position of the deflection roller is determined, a target position of this deflection roller is determined from the deviation of the actual position of the hot strip from the specified target position of the hot strip, and a target adjustment speed value for adjusting the angle between the longitudinal center axis of this deflection roller and the Longitudinal axis of the flatness measuring device determined as a function of 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 setpoint adjustment speed value is determined as a function of 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 perpendicularly to the longitudinal axis of the flatness measuring device, the pivoting of the respective Deflection roller performed in the plane depending on 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 is variable.
  • FIG. 1A a schematic plan view of an exemplary embodiment of a flatness measuring device according to the invention
  • FIG. 1B a schematic side view of the flatness measuring device shown in FIG. 1A;
  • FIG. 2 a flowchart of an exemplary embodiment of a method according to the invention.
  • FIG. 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 entry-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 barrel surface with increased roughness.
  • the inlet-side deflection roller 3 can have a wear-inhibiting ball coating (not shown).
  • the flatness measuring device 1 has a deflection roller 5 on the outlet side for contacting the first large side in the form of the underside of the hot strip 2 .
  • the deflection roller 5 on the outlet side is part of a roller table on the outlet side, of which a further guide roller 4 is shown.
  • the deflection roller 5 on the outlet side can have a barrel surface with increased roughness.
  • the deflection roller 5 on the outlet side can have a wear-inhibiting ball coating (not shown).
  • the flatness measuring device 1 has a middle deflection roller 7, which is arranged between the inlet-side deflection roller 3 and the outlet-side deflection roller 5 with respect to a strip travel direction 6 of the hot-rolled strip 2 and can be set against a second large side opposite the first large side of the hot-rolled strip 2 in the form of an upper side of the hot-rolled strip 2.
  • the middle deflection roller 7 serves as a flatness measuring roller and can have a barrel surface with increased roughness.
  • the middle deflection roller 7 can have a non-illustrated anti-wear ball coating.
  • 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 adjustment device 9 connected to the detection device 8 , the deflection roller 3 on the inlet side and the central deflection roller 7 .
  • the adjustment device 9 is set up to determine an angle a between a longitudinal center axis 10 of the inlet-side deflection roller 3 and a longitudinal axis 11 of the flatness measuring device 1 running transversely to the deflection rollers 3, 5 and 7, depending on a deviation of the actual position of the hot strip 2 from a specified target position of the hot strip 2 to vary.
  • the inlet-side deflection roller 3 is shown in two pivot positions, once in solid lines and once in dashed lines, the horizontal pivotability of the inlet-side deflection roller 3 being indicated by a double arrow 12 .
  • the entry-side deflection roller 3 is arranged to be displaceable about an axis of rotation (not shown) that runs perpendicular to a strip section of the hot strip 2 fed to the entry-side deflection roller 3 and perpendicular to the plane of the drawing, the axis of rotation being offset with respect to the longitudinal axis 10 of the entry-side deflection roller 3 to the center of the entry-side deflection roller 3 is arranged.
  • 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 adjustment device 9 is set up to determine an actual position of the entry-side deflection roller 3, to determine a desired position of the entry-side deflection roller 3 from the deviation of the actual position of the hot strip 2 from the specified desired position of the hot strip 2, and a desired adjustment speed value for adjusting the angle a between the longitudinal center axis 10 of the entry-side deflection roller 3 and the longitudinal axis 11 of the flatness measuring device 1 as a function of a deviation of the actual position of the entry-side deflection roller 3 from the target position of the entry-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 set the target adjusting speed value in To determine the dependence of the speed of the sideways movement of the hot strip 2.
  • the adjustment device 9 is also set up to pivot the central 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 adjustment device 9 is set up to pivot the middle deflection roller 7 in the plane as a function of an angular value by which the angle a 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 adjustment 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 is rotatably mounted, with the adjusting device 9 being connected via the holding frame to the respective deflection rollers 3, 5 or 7 or the deflection rollers 3, 5 or 7 and the holding frame can be displaced together with the deflection rollers 3, 5 or 7 connected thereto.
  • Figure 1B shows a schematic side view of the flatness measuring device 1 shown in Figure 1A.
  • the vertical pivotability of the central deflection roller 7 is shown, once in solid lines and once in dashed lines, the vertical pivotability of the central deflection roller 7 being indicated by a double arrow 13 .
  • FIG. 2 shows a flow chart of an exemplary embodiment of a method according to the invention for operating a flatness measuring device for measuring a flatness of a hot strip within a hot rolling mill.
  • the flatness measuring device can be designed in accordance with the exemplary embodiment shown in FIGS. 1A and 1B.
  • First, an actual position list of the hot strip is recorded.
  • a difference is formed from the actual position List and a predetermined target position Lsoii of the hot strip by means of a subtractor D1 of the adjusting device, which difference is fed to an average controller M of the adjusting device of the flatness measuring device.
  • the center controller M generates a setpoint position Psou of the deflection roller connected to the adjustment device, which optimizes the strip run of the hot strip.
  • an actual position Pist of the deflection roller connected to the adjustment device is recorded.
  • a further difference is formed from the actual position Pist of the deflection roller and the target position Psou of the deflection roller by means of a further subtraction element D2 of the adjusting device, which difference is fed to a swivel controller S of the adjusting device of the flatness measuring device.
  • 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 difference generated by means of the subtraction element D1 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 adjusting speed value generated by swivel controller S and the additional value generated by differential controller D are added using an adder A of the adjusting device, resulting in a target adjusting speed value Vsoii that can be used to control actuators of the adjusting device.
  • an angle between a longitudinal center axis of the deflection roller connected to the adjustment device and a longitudinal axis of the flatness measuring device running transversely to the deflection rollers is varied as a function of a deviation of the actual position List of the hot strip from a predetermined target position Lsoii of the hot strip.
  • an actual position Pist of the deflection roller connected to the adjustment device is determined from which Deviation of the actual position List of the hot strip from the specified target position Lsoii of the hot strip determines a target position Psou of the deflection roller connected to the adjustment device and a target adjustment speed additional 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 depending on a deviation of the Actual position Pist of this deflection roller is determined from the target position Psou of this deflection roller.
  • a speed of a sideways movement of the hot strip is determined and the additional setpoint adjustment speed value is determined as a function of 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 an adjustment of the deflection roller connected to the adjustment device, the deflection roller, the position of which can be correspondingly varied, or another deflection roller of the flatness measuring device can be pivoted in one 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 angular 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.
  • Vsoii target adjustment speed value a angle between 10 and 11

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

La présente invention concerne un dispositif de mesure de planéité (1) pour mesurer la planéité d'une bande laminée à chaud (2) à l'intérieur d'un laminoir à chaud, comprenant : - au moins un cylindre de déflexion côté entrée (3) pour venir en contact avec un premier grand côté de la bande laminée à chaud (2) ; - au moins un cylindre de déflexion côté sortie (5) pour venir en contact avec le premier grand côté de la bande laminée à chaud (2) ; et - au moins un cylindre de déflexion central (7), qui est disposé entre le cylindre de déflexion côté entrée (3) et le cylindre de déflexion côté sortie (5) par rapport à la direction de défilement de la bande (6) de la bande laminée à chaud (2), peut être placé contre un second grand côté de la bande laminée à chaud (2) à l'opposé du premier grand côté de la bande laminée à chaud (2), et est utilisée en tant que cylindre de mesure de planéité. Afin d'empêcher la bande laminée à chaud (2) de s'étendre latéralement dans un laminoir à chaud lors d'une mesure de planéité sur la bande laminée à chaud (2), le dispositif de mesure de planéité (1) comprend au moins un appareil de détection (8) pour détecter une position réelle (LIst) de la bande laminée à chaud (2) et au moins un appareil de réglage (9), qui est raccordé à l'appareil de détection (8) et à au moins l'un des cylindres de déflexion (3, 5, 7) et est conçu pour faire varier un angle (α) entre un axe central longitudinal (10) du cylindre de déflexion (3, 5, 7) raccordé à l'appareil de réglage (9) et un axe longitudinal (11) du dispositif de mesure de planéité (1) s'étendant transversalement aux cylindres de déflexion (3, 5, 7) en fonction de l'écart de la position réelle (LIst) de la bande laminée à chaud (2) à partir d'une position cible prédéfinie (LSoll) de la bande laminée à chaud (2).
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)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
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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EP4204166A1 true EP4204166A1 (fr) 2023-07-05
EP4204166C0 EP4204166C0 (fr) 2024-02-21
EP4204166B1 EP4204166B1 (fr) 2024-02-21

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EP21762430.3A Active EP4204166B1 (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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US (1) US20230311182A1 (fr)
EP (1) EP4204166B1 (fr)
JP (1) JP2023539618A (fr)
CN (1) CN115989095A (fr)
DE (1) DE102020210970A1 (fr)
WO (1) WO2022043069A1 (fr)

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TWI808914B (zh) * 2022-10-27 2023-07-11 中國鋼鐵股份有限公司 用於精軋機站間的鋼帶量測方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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

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Publication number Publication date
DE102020210970A1 (de) 2022-03-03
WO2022043069A1 (fr) 2022-03-03
CN115989095A (zh) 2023-04-18
JP2023539618A (ja) 2023-09-15
US20230311182A1 (en) 2023-10-05
EP4204166C0 (fr) 2024-02-21
EP4204166B1 (fr) 2024-02-21

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