EP2283942A1 - Procédé d'influence d'une position d'un matériau de laminage traversant un train de laminage à plusieurs équipements, dispositif de commande et/ou de réglage pour une chaîne de laminage et chaîne de laminage - Google Patents

Procédé d'influence d'une position d'un matériau de laminage traversant un train de laminage à plusieurs équipements, dispositif de commande et/ou de réglage pour une chaîne de laminage et chaîne de laminage Download PDF

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Publication number
EP2283942A1
EP2283942A1 EP09167041A EP09167041A EP2283942A1 EP 2283942 A1 EP2283942 A1 EP 2283942A1 EP 09167041 A EP09167041 A EP 09167041A EP 09167041 A EP09167041 A EP 09167041A EP 2283942 A1 EP2283942 A1 EP 2283942A1
Authority
EP
European Patent Office
Prior art keywords
rolling
rolling stock
tensile stress
actuator
stand
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Withdrawn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
EP09167041A
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German (de)
English (en)
Inventor
Ansgar GRÜSS
Günther Winter
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP09167041A priority Critical patent/EP2283942A1/fr
Publication of EP2283942A1 publication Critical patent/EP2283942A1/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Withdrawn legal-status Critical Current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
    • B21B37/68—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
    • 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
    • B21B37/48—Tension control; Compression control
    • B21B37/50—Tension control; Compression control by looper control
    • 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
    • B21B37/58—Roll-force control; Roll-gap control
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
    • B21B39/08—Braking or tensioning arrangements
    • B21B39/084—Looper devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/14—Guiding, positioning or aligning work

Definitions

  • the invention relates to a method for influencing a layer of a multi-stand rolling train, in particular hot rolling mill, continuous rolling stock, in particular metal strip, wherein the rolling stock at least a first rolling stand, comprising a first nip, and a second rolling stand, having a second nip passes, wherein the rolling stock extends between the first rolling stand and the second rolling stand. Furthermore, the invention relates to a control and / or regulating device for a rolling mill, as well as a rolling mill for rolling of rolling stock, with a first rolling stand, comprising a first roll gap, and a second rolling stand, having a second roll gap.
  • the invention is in the technical field of rolling mill technology.
  • the position of a strip to be rolled within the rolling train plays a not insignificant role for the quality of the ultimately producible rolled end product. If the course of the rolling stock from the desired position of the rolling stock in the rolling train is too large, it may even be necessary to interrupt the rolling process. It can also cause damage to the system.
  • Such a method is known, for example, from the published patent application DE 198 43 039 A1 which is a procedure and shows an apparatus for correcting a tape when rolling tapes having at least one stand.
  • the position of the band is determined by means of measured values related to the tensile stress values of the rolling stock. If the actual values of the determined measured variables deviate from the desired nominal values, this is interpreted as an error of a band position in the rolling train and the roller adjustment is changed, whereby the band position is to be corrected.
  • the band position of the rolling stock is determined only indirectly via measured characteristic of the tensile stress. Because their deviation from a setpoint is not necessarily based on a faulty band position. Moreover, by changing the setting of the work rolls of the rolling stands, the rolling process may be undesirably affected, i. Due to the correction of the strip course due to the change in the roll positions, undesired deviations from other parameters of the rolling stock can occur.
  • the object of the present invention is to further improve the strip running of rolling stock in a rolling mill.
  • a procedural part of the object is achieved by a method of the aforementioned type, wherein between the first rolling stand and the second rolling stand means for setting a variable tensile stress distribution in the width direction of the rolling stock are provided, wherein the tensile stress distribution in the region of the first roll gap and / or the second Rolling gap is effective, and the position of the rolling stock is controlled by adjusting the tensile stress distribution targeted.
  • the mill operator receives an additional actuator for influencing the band position, without necessarily having to influence the employment of the rolls of the rolling mills of the rolling mill.
  • a very high-quality roller product is made possible, and, on the other hand, a desired band position can be achieved of the rolling stock during the rolling process in the rolling mill can be adjusted by the means mentioned above.
  • in particular means can be used, which are already present in the rolling mill. However, these are then to be modified or prepared in such a way that with these a variable tensile stress distribution in the width direction of the rolling stock in the region of the first roll gap and / or second roll gap can be adjusted.
  • side guides can be used as a potentially suitable means.
  • a position of the rolling stock is detected relative to a transport path provided for the rolling stock, preferably between the two rolling stands, and the position of the rolling stock is controlled and / or regulated by adjusting the tension distribution on the basis of the detected position of the rolling stock.
  • the transport path is the desired path that a rolling stock should take through the rolling mill.
  • the center axis of the rolling train can be used at the height of the transport level of the rolling stock. Since in the detection of the situation usually any reference points of the rolling mill are also included, in this case always takes place a detection of the situation relative to a designated transport path.
  • any measurement which allows an assessment of the position or the run of the rolling stock in the rolling mill fulfills the characteristic of "detection relative to a planned transport path".
  • an automated solution can be provided here, which is preferably based on an optical detection of the band layer.
  • the band position is detected directly and it can be done on the basis of this directly detected band position, a particularly accurate control or regulation of the position of the rolling stock in the rolling train by a means corresponding tensile stress distribution in the region of the first roll gap and / or second roll gap is set.
  • the means comprise a loop lifter over which the rolling stock is guided.
  • a loop lifter as means for setting a variable tensile stress distribution in the width direction of the rolling stock, a band layer can be influenced in a particularly simple manner by means of an already required device.
  • the loop lifter has a first actuator for the drive side of the rolling train and a second actuator for the operating side of the rolling train, wherein the first actuator and / or the second actuator are used to adjust the variable tensile stress distribution.
  • the loop lifter or its roller can be moved independently on the drive side and operator side. That It can be realized different positions for the drive side and operator side and thus in particular almost arbitrary inclinations of the looper roll between the drive and operating side. This allows a variable adjustment of the tensile stress distribution in the region of the first roll gap and / or second roll gap.
  • the first actuator and the second actuator are each formed as a hydraulic cylinder, by means of which a position and / or orientation of a roller of the loop lifter for adjusting the variable tension is set.
  • two independently operable hydraulic cylinder as large variability in the positioning and alignability of the role is realized.
  • the use of two independent linear actuators is particularly useful suitable for the invention.
  • a variable tensile stress distribution in the first nip and / or second nip can be adjusted in order to influence the band position of the rolling stock in the rolling train in a targeted manner.
  • a tensile stress distribution for the rolling stock in the region of the loop lifter is determined by means of a measuring device, in particular by means of a measuring roller encompassed by the loop lifter for detecting a tensile stress which has been resolved in the width direction.
  • a tensile stress distribution in the width direction for the rolling stock can be determined. From this tensile stress distribution conclusions can be drawn on the tensile stress distribution in the first and / or second nip, whereby the tape run or the band position can be influenced.
  • the measuring device can be configured, for example, as a segmented measuring roller.
  • the conventional looper roller is replaced by a corresponding measuring roller.
  • a force measurement for the drive side and operating side for the role of the loop lifter for determining a tensile stress distribution in the region of the loop lifter can be used.
  • the known pivoting of the work rolls for adjusting the rolling stock in the rolling train is combined by means of the method according to the invention.
  • a tensile stress distribution in the width direction in the region of the first roll gap and / or second roll gap is adjusted by means of appropriate means, there is an interaction in a change in the employment of the work rolls of the rolling stands.
  • this changes the effective tensile stress in the width direction of the rolling stock in the area the nip, when the nip forming work rolls are employed in a modified manner.
  • further variations of the tensile stress distribution in the width direction are made possible.
  • This further increases the variability of the method for influencing the band position by increasing the variability of the adjustable tensile stress distribution in the nip.
  • An apparatus part of the object is achieved by a control and / or regulating device for a rolling mill, with a machine-readable program code which has control commands which, when executed, the control and / or regulating device for carrying out the method according to one of claims 1 to 6 cause.
  • the device-related part of the object is also achieved by means of a rolling mill for rolling rolling, having a first rolling stand, comprising a first nip, and a second rolling mill, comprising a second nip, with means for adjusting a variable tensile stress distribution in the width direction of the rolling stock, the Means are arranged between the first rolling stand and the second rolling stand, wherein the tensile stress distribution in the region of the first roll gap and / or the second roll gap is effective, with a control and / or regulating device according to claim 7, wherein the means for adjusting a variable tensile stress distribution the control and / or regulating device are operatively connected.
  • a device is provided by means of which the method according to the invention can be carried out. The advantages for this result analogously from the above statements on the corresponding method claim.
  • a device for detecting a position of a rolling stock passing through the rolling train, in particular relative to a designated transport path which is operatively connected to the control and / or regulating device is.
  • This makes it possible to control the strip position of the rolling stock on the basis of the detected strip position of the rolling stock in the rolling train by providing the means for setting a variable tensile stress distribution in the width direction of the rolling stock in the region of the first and / or second roll gap.
  • the means comprise a loop lifter.
  • the loop lifter is adapted to generate a variable tensile stress distribution in the width direction of the rolling stock in the region of the first roll gap and / or the second roll gap.
  • the loop lifter additionally has the function of detecting the tensile stress of the rolling stock between the first rolling stand and the second rolling stand.
  • the loop lifter has a first actuator for the drive side of the rolling train, and a second actuator for the operating side of the rolling train, wherein the first actuator and the second actuator are independently operable.
  • the first actuator and the second actuator is each formed as a hydraulic cylinder, by means of which a position and / or orientation of a roller of the loop lifter for adjusting the variable tension is adjustable.
  • these are means for linear adjustment of the height of the role of the loop lifter, the position of the role on the drive side and operating side set almost arbitrary can be. This achieves a high variability in the setting of the variable tensile stress distribution.
  • the loop lifter comprises a measuring device, wherein the measuring device is designed to detect a tensile stress distribution in the width direction of a rolling stock guided over the loop lifter.
  • the measuring device is designed as a measuring roller for detecting a tensile stress distribution in the width direction of the rolling stock.
  • This measuring roller can replace the traditional role of looper.
  • this measuring roller may, for example, be designed as a segmented measuring roller, which is available on the market, for example, under the name Planicim measuring roller.
  • the measuring device can also be realized via a force measuring device.
  • a force measuring device for example, by means of a drive-side and operator-side measurement of the force on the role of looper a force distribution to the role of the loop lifter, especially in the longitudinal direction of the roller, and determined this force distribution or force difference between the drive side and operating side for controlling and / or regulating the Tensile tension in the width direction can be used in the region of the first and / or second roll gap.
  • the drive-side and / or operator-side measurement of the force can take place, for example, via load cells.
  • the measurement of the force in the longitudinal direction of the roller can also be used to determine a tensile stress distribution which can be used to control and / or regulate the band position.
  • the device according to the invention is additionally at least one of two rolling stands operatively connected to the control and / or regulating device and it is based on the detected position of the rolling stock additionally a control engagement for at least one of the two rolling stands, in particular for the work rolls, for adjusting the position of the rolling stock.
  • It is a combination of the conventional means for adjusting the position of a rolling stock in the rolling mill by changing the setting of work rolls. Due to the effective tension in the nip split generated by the appropriate means between the first stand and second rolling stand, the influenceability of the position of the rolling stock is further improved.
  • the invention extends to a machine-readable program code for a control and / or regulating device according to claim 7, which comprises control commands which cause the control and / or regulating device to carry out the method according to one of claims 1 to 6.
  • the invention extends to a storage medium, e.g. a flash memory medium or a CD or DVD, with machine-readable program code.
  • a storage medium e.g. a flash memory medium or a CD or DVD, with machine-readable program code.
  • FIG. 1 shows a section of a rolling train 1.
  • the present rolling train 1 may be slaughtergerüstig, dreigerüstig, four-stand, five-stand or have more than five stands. That is, the rolling train 1 has at least two rolling stands 2 and 3, respectively.
  • FIG. 1 shows a rolling mill 1 in operation.
  • rolling stock G ie hot strip in the context of this exemplary embodiment, passes through the rolling train 1 and is located in particular both in the roll gap WS 1 of the first rolling stand 2 and in the rolling gap WS 2 of the second rolling stand 3.
  • the rolling stock G extends from rolling stand 2 to rolling stand 3, that is formed integrally at least in this area.
  • a detection device 4 for detecting a band position of the rolling stock G in the rolling mill 1, in particular relative to the transport center axis.
  • the position of the rolling stock G in the rolling mill 1, in particular between the rolling stands 2 and 3 can be determined.
  • a loop lifter 5 is arranged between the first rolling stand 2 and the second rolling stand 3.
  • the loop lifter 5 is in the state shown in contact with the rolling stock G and is used to detect the belt tension.
  • the loop lifter 5 serves to adjust a tensile stress distribution in the width direction of the rolling stock G, which acts both in the nip WS 1 of the first rolling stand 2 and in the nip WS 2 of the second rolling stand 3.
  • This tensile stress distribution in the roll nips WS 1 or WS 2 leads to the formation of a transverse force acting on the rolling stock G in the respective roll gap WS 1 or WS 2 by means of this transverse tension, which can be adjusted via the tensile stress distribution, a course of a strip in the rolling train 1 can be set.
  • the loop lifter 5 has two hydraulic cylinders 6 and 7 which can be operated independently of one another. These serve to adjust the position of a roller 5 'of the loop lifter for drive side A or operating side B.
  • the roller 5' of the loop lifter 5 realize pivotal movements about a plurality of pivot points.
  • the tensile stress in the roll gap WS 1 of the first roll stand and in the roll gap WS 2 of the second roll stand can be set almost arbitrarily. Accordingly versatile is the influenceability of the band position of the rolling stock G in the rolling mill. 1
  • the detection device 4 is operatively connected to a control and / or regulating device 8.
  • the detected band position by means of the camera preferably a 3D camera, is supplied via signals to a control and / or regulating device 8.
  • loop lifter 5 in particular its actuators, ie in the present case, the hydraulic cylinders 6 and 7 for drive side A and operating side B, with the control and / or regulating device 8 operatively connected.
  • the positioning systems of the first rolling stand 2 and of the second rolling stand 3 are also operatively connected to the control and / or regulating device 8.
  • the control and / or regulating device 8 is prepared for carrying out a variant of the method according to the invention.
  • a machine-readable program code 9, which comprises control commands which cause the method to be carried out is transmitted via a network or via a storage medium 10, e.g. a USB stick or a CD.
  • the machine-readable program code 9 is preferably stored in memory on the control and / or regulating device 8.
  • the control and / or regulating device 8 initiates a detection of the strip position of the rolling stock G in the rolling train 1. On the basis of this detected strip position, the control and / or regulating device 8 determines a deviation of the current and / or future actual strip position from a target band position in the rolling mill 1.
  • control and / or regulating device 8 determines a tensile stress distribution which changes the band position from the actual band position in the direction of the nominal band position.
  • control signals for the hydraulic cylinders 6 or 7 and / or for the positioning systems of the work rolls 11 of the first and / or second roll stand 2 or 3 are determined on this basis, so that the determined tensile stress distribution in the first and / or second roll gap WS 1 or WS 2 is set.
  • the adjustment of the band position can be done without the intermediate step of a tension distribution calculation.
  • a movement of Roller 5 'of the loop lifter 5 carried out such that a desired band position is set.
  • the control or regulation of the band position is based on a learning process of the control and / or regulating device, for example by means of a neural network.
  • a strip running of a rolling stock G can be stably adjusted by a rolling mill 1, which has a positive effect on the quality of the products produced with the rolling mill 1.
  • the roller 5 'of the loop lifter is designed as a segmented measuring roller for detecting a tensile stress of the rolling stock in the width direction.
  • the tensile stress values present on the roller as a result of the tensile stress measurement can advantageously be combined with the optical detection of the belt layer and used for controlling and / or regulating the belt layer.
  • FIG. 1 is below the first rolling mill 2 is a plan view of the rolling mill G passing through the first rolling mill 2 darg Robinson.
  • the arrows shown here represent an exemplary tensile stress distribution over the width of the rolling stock G.
  • FIG. 3 and FIG. 4 show different positions and orientations of the roller 5 'of the loop lifter 5.
  • FIG. 2 shows a parallel employment for the role 5 'on the drive side A and operating side B of the loop lifter 5.
  • no additional tensile stress distribution is applied to the roll nip WS 1 and WS 2.
  • This position substantially corresponds to the operating state of a loop lifter 5 used today in the rolling train 1, which is used only for detecting the tension.
  • FIG. 3 By lifting the operator-side roller end relative to the drive-side roller end, an additional asymmetrical tensile stress distribution in the first and / or second roller gap WS 1 or WS 2 is achieved.
  • the tension in the nip WS 1 and WS 2 on the operating side B is higher than on the drive side A.
  • the tape thus runs when rolling in the direction of the drive side A.
  • FIG. 4 shows a substantially reverse employment of the hydraulic cylinders 6 and 7 of the loop lifter 5 compared with FIG. 3 ,
  • the user-side end of the roller 5 ' is lowered relative to the drive-side end of the roller 5'.
  • a reinforced train on the drive side A in the nip WS 1 and WS 2 is generated, which leads to the running of the belt G at the exit from the roll gap WS 1 in the direction of the operator side B.
  • the work rolls 11 of the first and / or second roll stand 2 or 3 can be tuned to the position and / or position of the roll 5 'of the loop lifter 5, in particular pivoted. It should be noted here that the tension in the respective roll gap WS 1 or WS 2 is additionally influenced by pivoting the work rolls 11. By pivoting the work rolls can thus be made in addition a fine adjustment of the tape run.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)
EP09167041A 2009-08-03 2009-08-03 Procédé d'influence d'une position d'un matériau de laminage traversant un train de laminage à plusieurs équipements, dispositif de commande et/ou de réglage pour une chaîne de laminage et chaîne de laminage Withdrawn EP2283942A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09167041A EP2283942A1 (fr) 2009-08-03 2009-08-03 Procédé d'influence d'une position d'un matériau de laminage traversant un train de laminage à plusieurs équipements, dispositif de commande et/ou de réglage pour une chaîne de laminage et chaîne de laminage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09167041A EP2283942A1 (fr) 2009-08-03 2009-08-03 Procédé d'influence d'une position d'un matériau de laminage traversant un train de laminage à plusieurs équipements, dispositif de commande et/ou de réglage pour une chaîne de laminage et chaîne de laminage

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EP2283942A1 true EP2283942A1 (fr) 2011-02-16

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EP09167041A Withdrawn EP2283942A1 (fr) 2009-08-03 2009-08-03 Procédé d'influence d'une position d'un matériau de laminage traversant un train de laminage à plusieurs équipements, dispositif de commande et/ou de réglage pour une chaîne de laminage et chaîne de laminage

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021224950A1 (fr) * 2020-05-06 2021-11-11 Danieli & C. Officine Meccaniche S.P.A. Procédé et appareil de commande et de réglage de l'action de traction dans un laminoir, et laminoir correspondant
EP4238668A4 (fr) * 2020-10-29 2024-03-13 JFE Steel Corporation Procédé de détection de quantité de coudes et procédé de régulation des coudes pour bande métallique

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62156013A (ja) * 1985-12-27 1987-07-11 Sumitomo Metal Ind Ltd 連続圧延機におけるル−パの制御方法
JPS63123511A (ja) * 1986-11-12 1988-05-27 Hitachi Ltd 蛇行制御装置
JPH09327714A (ja) * 1996-06-07 1997-12-22 Nisshin Steel Co Ltd 連続熱間仕上圧延機におけるルーパー装置による帯鋼幅方向端部の張力制御方法
JPH10244309A (ja) * 1997-03-04 1998-09-14 Nisshin Steel Co Ltd 熱間仕上連続圧延機におけるルーパステアリング装置及び圧延設備の蛇行制御方法
DE19843039A1 (de) 1998-07-24 2000-01-27 Schloemann Siemag Ag Verfahren und Vorrichtung zum Korrigieren des Bandverlaufs beim Bandwalzen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62156013A (ja) * 1985-12-27 1987-07-11 Sumitomo Metal Ind Ltd 連続圧延機におけるル−パの制御方法
JPS63123511A (ja) * 1986-11-12 1988-05-27 Hitachi Ltd 蛇行制御装置
JPH09327714A (ja) * 1996-06-07 1997-12-22 Nisshin Steel Co Ltd 連続熱間仕上圧延機におけるルーパー装置による帯鋼幅方向端部の張力制御方法
JPH10244309A (ja) * 1997-03-04 1998-09-14 Nisshin Steel Co Ltd 熱間仕上連続圧延機におけるルーパステアリング装置及び圧延設備の蛇行制御方法
DE19843039A1 (de) 1998-07-24 2000-01-27 Schloemann Siemag Ag Verfahren und Vorrichtung zum Korrigieren des Bandverlaufs beim Bandwalzen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021224950A1 (fr) * 2020-05-06 2021-11-11 Danieli & C. Officine Meccaniche S.P.A. Procédé et appareil de commande et de réglage de l'action de traction dans un laminoir, et laminoir correspondant
EP4238668A4 (fr) * 2020-10-29 2024-03-13 JFE Steel Corporation Procédé de détection de quantité de coudes et procédé de régulation des coudes pour bande métallique

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