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(11) | EP 2 937 151 B1 |
| (12) | EUROPEAN PATENT SPECIFICATION |
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APPARATUS AND METHOD FOR CONTROLLING WIDTH OF A STRIP HOT ROLLED IN A DIRECT ENDLESS HOT ROLLING LINE BETWEEN CONTINUOUS CASTING AND HOT ROLLING VORRICHTUNG UND VERFAHREN ZUR REGELUNG DER BREITE EINES IN EINER ENDLOS ARBEITENDEN DIREKTEN WARMWALZSTRASSE ZWISCHEN DEM STRANGGIESSEN UND DEM WARMWALZEN GEWALZTEN BANDES APPAREIL ET PROCÉDÉ POUR CONTRÔLER LA LARGEUR D'UNE BANDE LAMINÉE DANS UNE LIGNE DE LAMINAGE À CHAUD SANS FIN DIRECTE ENTRE COULÉE CONTINUE ET LAMINAGE À CHAUD |
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| Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention). |
[Technical Field]
[0001] Aspects of embodiments relate to a width control apparatus and method for the use thereof in a single continuous rolling process line between continuous casting and hot rolling, and more particularly, to a technology for controlling product width at an exit section of a finishing mill to have a predetermined target width without using an edger, a width varying device. An apparatus and a method in accordance with the preambles of claim 1 and claim 6 respectively is e.g. known from document WO99/04915 A.
[Background Art]
[0002] Mini-mills are mills performing a process of melting scraps using an electrical furnace and then producing steel using continuous casting-rolling equipment.
[0003] FIG. 1 illustrates a mini-mill including a continuous caster CC, a roughing mill RM, a heating device HD, a finishing mill FM, and a down coiler DC. In such a mini-mill, continuous rolling is performed between continuous casting and hot rolling without ceasing. Here, width control is performed using a method provided by installing an edger, a width varying device, at a rear end of the continuous caster CC or a front end of the finishing mill FM, a method in which rolling is performed by allowing a width of an exit section of the continuous caster CC to be maintained constantly without a width variation, a method performed by varying a continuous casting mold width, or the like.
[0004] However, in the case of the method using an edger, when a mini-mill process illustrated with reference to FIG. 1 is performed, since a thickness of a slab of the continuous caster and a bar thickness of an exit section of the roughing mill RM are relatively thin, a buckling problem may occur. Further, since difficulties in adding an edger due to a spatial restriction in an installation thereof may be present, there may also be difficulties in the commercialization thereof.
[0005] Accordingly, the method of performing rolling by constantly maintaining a width of an exit section of the continuous caster CC without a width variation and the method of varying a width by varying a continuous casting mold width may be used.
[0006] However, in the case of constantly maintaining a width of an exit side of the continuous caster, it may be difficult to variously cope with requirements for products having various widths.
[0007] In addition, in a case in which only a continuous casting mold width is varied and thus width spread or shrinkage thereof occurs during passing through a liquid core reduction (LCR) in a continuous caster, a roughing mill and a finishing mill, compensation therefore may be difficult to be carried out and it may thus be difficult to obtain a uniform width.
[Related Art Document]
[0008] As the related art document, Korean Patent Registration Publication No. 10-0957707 (Published May 4, 2010) may be provided.
[Disclosure]
[Technical Problem]
[0009] An aspect of an embodiment may provide a high precision on-line width control apparatus capable of rapidly coping with the orders of various widths by users.
[Technical Solution]
[0011] According to an aspect of the inventive concept, there is provided a width control apparatus for the use thereof in a single continuous rolling process line between continuous casting and hot rolling performed in a mini mill including a continuous caster, a roughing mill, a heating device and a finishing mill, the width control apparatus including: a tension control unit controlling tension applied to a strip between the roughing mill and the finishing mill to have a target tension value; a width measuring unit measuring a width of an exit section of the finishing mill; and a width control unit performing control so as to change the target tension value when the measured width of the exit section of the finishing mill differs from a target width.
[0012] The tension control unit may include a tension measuring portion measuring the tension applied to the strip between the roughing mill and the finishing mill.
[0013] The tension control unit may estimate the tension applied to the strip between the roughing mill and the finishing mill using a rolling load of the roughing mill, motor torque, or a measurement value of tension applied to the strip between stands.
[0014] When a measured width of the exit section of the finishing mill is smaller than the target width, the width control unit may control the tension control unit so as to lower the target tension value in proportion to a difference between the measured width of the exit section of the finishing mill and the target width.
[0015] When the measured width of the exit section of the finishing mill is greater than the target width, the width control unit may control the tension control unit so as to increase the target tension value in proportion to a difference between the measured width of the exit section of the finishing mill and the target width.
[0016] According to an aspect of the inventive concept, there is provided a width control method according to claim 6. The width control method may further include measuring a width of an exit section of the finishing mill; and changing the target tension value when the measured width of the exit section of the finishing mill differs from a target width.
[0017] The measuring or estimating of the tension applied to the strip between the roughing mill and the finishing mill may be performed by estimating the tension applied to the strip between the roughing mill and the finishing mill by using a rolling load of the roughing mill, motor torque, or a measured value of tension applied to a strip between stands.
[0018] The changing of the target tension value performed when the measured width of the exit section of the finishing mill differs from the target width may be performed by lowering the target tension value in proportion to a difference between the measured width of the exit section of the finishing mill and the target width when the measured width of the exit section of the finishing mill is smaller than the target width.
[0019] The changing of the target tension value performed when the measured width of the exit section of the finishing mill differs from the target width may be performed by increasing the target tension value in proportion to a difference between the measured width of the exit section of the finishing mill and the target width when the measured width of the exit section of the finishing mill is greater than the target width.
[Advantageous Effects]
[0020] According to exemplary embodiments of the present disclosure, product width at an exit section of a finishing mill may be controlled to have a predetermined target width without using an edger, a width varying device.
[Description of Drawings]
[0021]
FIG. 1 illustrates a process in which a single continuous rolling process between continuous casting and hot rolling is performed in a mini-mill according to the related art; and
FIG. 2 illustrates a process in which a single continuous rolling process between continuous casting and hot rolling is performed in a mini-mill according to an embodiment.
[Best Mode]
[0023] Embodiments may, however, be embodied in many different forms and should not be construed as being limited to embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the inventive concept to those skilled in the art.
[0024] FIG. 2 illustrates a process in which a single continuous rolling process between continuous casting and hot rolling is performed in a mini-mill process according to an embodiment.
[0025] With reference to FIG. 2, a width control apparatus according to an embodiment may be an apparatus for width control in a single continuous rolling process line between continuous casting and hot rolling, in a mini-mill including a continuous caster CC, a roughing mill RM, a heating device HD and a finishing mill FM. In addition, the width control apparatus includes a width measuring unit 3, a tension control unit 4 and a width control unit5.
[0026] The tension control unit 4 may perform control such that tension applied to a strip between the roughing mill RM and the finishing mill FM may have a target tension value. In this case, the tension applied to a strip between the roughing mill RM and the finishing mill FM may be directly measured through the tension measuring portion 2 or may be estimated using a rolling load of the roughing mill RM, motor torque, or a measured value of tension applied to a strip between stands. The rolling load of the roughing mill RM may be measured by a load measuring device 7. The measurement value of tension applied to a strip between stands may be measured by the tension measuring portion 2.
[0027] The tension control unit 4 may control a speed of a first stand of an entrance section of the finishing mill FM such that tension applied to a strip between the roughing mill RM and the finishing mill FM may have a target tension value. In an embodiment, when the tension applied to a strip between the roughing mill RM and the finishing mill FM is lower than a target tension value, the speed of the first stand may be increased in proportion to a difference value between the tension applied to a strip between the roughing mill RM and the finishing mill FM and the target tension value. On the other hand, when the tension applied to a strip between the roughing mill RM and the finishing mill FM is higher than the target tension value, the speed of the first stand may be delayed in reverse proportion to a difference value between the tension applied to a strip between the roughing mill (RM) and the finishing mill FM and the target tension value.
[0028] Width control may be performed through tension control performed by the tension control unit 4. In addition thereto, more precise control of product width may be performed by measuring a width of an exit section of the finishing mill FM so as to vary a tension target value, a tension control reference value of the tension control unit 4. To this end, a width control apparatus according to an embodiment may further include a width measuring unit 3 and a width control unit 5.
[0030] When a measured width of an exit section of the finishing mill FM differs from a target width, the width control unit 5 may control the tension control unit 4 so as to change the target tension value.
[0031] For example, when a measured width of the exit section of the finishing mill FM is smaller than the target width, the width control unit 5 may control the tension control unit 4 so as to lower the target tension value in proportion to a difference between the measured width of the exit section of the finishing mill FM and the target width. Accordingly, as the tension control unit 4 lowers the target tension value, shrinkage in a width of a strip between the roughing mill RM and the finishing mill FM, occurring due to tension, may be reduced. Therefore, the width of the exit section of the finishing mill FM may be increased so as to reach a target width.
[0032] On the other hand, when the measured width of the exit section of the finishing mill FM is greater than a target width, the width control unit 5 may control the tension control unit 4 so as to increase the target tension value in proportion to a difference between the measured width of the exit section of the finishing mill FM and the target width. As a result, a width of a strip between the roughing mill RM and the finishing mill FM may be shrunk. Accordingly, the width of the exit section of the finishing mill FM may be reduced to reach the target width.
[0033] Accordingly, the width may controlled such that the width of a strip between the roughing mill RM and the finishing mill FM is shrunk or expanded by controlling the tension applied to a strip between the roughing mill RM and the finishing mill FM to be raised or lowered, such that the width of the exit section of the finishing mill FM may have a target width.
[0034] In addition, since the width control through feedback of the width of the exit section of the finishing mill FM is performed using the width measuring unit 3, the width in a direction of the strip length may be constantly controlled.
[0035] The width control in the single continuous rolling process line between continuous casting and hot rolling, using the width control apparatus, may be performed in a sequence in which tension applied to a strip between the roughing mill RM and the finishing mill FM is measured or estimated and the measured or estimated tension is controlled to a target tension value.
[0036] In addition thereto, the width of the exit section of the finishing mill FM may be measured, and when the measured width of the exit section of the finishing mill FM differs from the target width, the target tension value may be changed, such that the width of the exit section of the finishing mill FM may be more accurately controlled.
[0037] Therefore, according to an embodiment of the inventive concept, in a continuous mini-mill process performed between continuous casting and hot rolling, even when a width variation occurs during the continuous rolling process without using an edger, a width thereof may be constantly controlled. For example, the width of a strip between the roughing mill RM and the finishing mill FM may be decreased or increased through tension applied to a strip between the roughing mill RM and the finishing mill RM, and the tension applied to a strip between the roughing mill RM and the finishing mill FM may be continuously increased or decreased so as to obtain a target width of a product by measuring a width of an exit section of the finishing mill FM. As a result, during the continuous rolling process, product width variations and controlling for uniform width may be performed without using an edger, and an excellent width quality as compared to that of a conventional hot rolling process may be provided.
[0038] An implementation embodiment of the inventive concept will be described. Here, it may be assumed that the width of the exit section of the finishing mill FM is greater than the target width, by about 10 to 20mm. In an embodiment, the width of a strip provided between the roughing mill RM and the finishing mill FM may be reduced to be within a range of 10 to 20mm by using a tension control function of the tension control unit 4. In addition thereto, in a case in which a width of an exit section of the finishing mill FM measured through the width measuring unit 3, so as to allow for the width of the exit section of the finishing mill FM to become a target width, differs from the target width, the width control unit 5 may control the tension control unit 4 to perform a process in which the width of a strip provided between the roughing mill RM and the finishing mill FM is further increased or decreased. For example, in order to produce a product having a target margin width of about 7mm, the width of the exit section of the roughing mill may first be reduced by about 3mm by increasing tension of the strip. In this case, when the width of the exit section of the finishing mill measured through the width measuring unit 3 differs from the target width, the width control unit 5 may control the tension control unit 4 such that the width of the strip between the roughing mill RM and the finishing mill FM may be controlled by increasing or decreasing the tension applied to the strip between the roughing mill RM and the finishing mill FM so as to allow for the width of the exit section of the finishing mill FM to reach the target width.
[0039] As set forth above, in a width control apparatus and method for the use thereof in single continuous rolling process line between continuous casting and hot rolling according to an embodiment of the inventive concept, product width at an exit section of a finishing mill may be controlled to have a predetermined target width without using an edger, a width varying device.
1. An apparatus comprising a width control apparatus and a single continuous rolling
process line between continuous casting and hot rolling performed in a mini mill including
a continuous caster (CC), a roughing mill (RM), a heating device (HD) and a finishing
mill (FM), the width control apparatus comprising:
a tension control unit (4) controlling tension applied to a strip between the roughing mill (RM) and the finishing mill (FM) to have a target tension value;
a width measuring unit (3) measuring a width of an exit section of the finishing mill; and
a width control unit (5) performing control so as to change the target tension value when the measured width of the exit section of the finishing mill differs from a target width.
2. The width control apparatus of claim 1, wherein the tension control unit includes
a tension measuring portion measuring the tension applied to the strip between the
roughing mill and the finishing mill.
3. The width control apparatus of claim 1, wherein the tension control unit estimates
the tension applied to the strip between the roughing mill and the finishing mill
using a rolling load of the roughing mill, motor torque, or a measurement value of
tension applied to the strip between stands.
4. The width control apparatus of claim 1, wherein when a measured width of the exit
section of the finishing mill is smaller than the target width, the width control
unit controls the tension control unit so as to lower the target tension value in
proportion to a difference between the measured width of the exit section of the finishing
mill and the target width.
5. The width control apparatus of claim 1, wherein when the measured width of the exit
section of the finishing mill is greater than the target width, the width control
unit controls the tension control unit so as to increase the target tension value
in proportion to a difference between the measured width of the exit section of the
finishing mill and the target width.
6. A width control method in a single continuous rolling process line between continuous
casting and hot rolling in a mini-mill including a continuous caster (CC), a roughing
mill (RM) a heating device (HD) and a finishing mill (FM) the method comprising:
measuring a width of an exit section of the finishing mill;
measuring or estimating tension applied to a strip between a roughing mill and a finishing mill;
performing controlling such that the measured or estimated tension has a target tension value; and
changing the target tension value when the measured width of the exit section of the finishing mill differs from a target width.
7. The width control method of claim 6, further comprising:
measuring a width of an exit section of the finishing mill; and
changing the target tension value when the measured width of the exit section of the finishing mill differs from a target width.
8. The width control method of claim 6, wherein the measuring or estimating of the tension
applied to the strip between the roughing mill and the finishing mill is performed
by estimating the tension applied to the strip between the roughing mill and the finishing
mill by using a rolling load of the roughing mill, motor torque, or a measured value
of tension applied to a strip between stands.
9. The width control method of claim 7, wherein the changing of the target tension value
performed when the measured width of the exit section of the finishing mill differs
from the target width is performed by lowering the target tension value in proportion
to a difference between the measured width of the exit section of the finishing mill
and the target width when the measured width of the exit section of the finishing
mill is smaller than the target width.
10. The width control method of claim 7, wherein the changing of the target tension value
performed when the measured width of the exit section of the finishing mill differs
from the target width is performed by increasing the target tension value in proportion
to a difference between the measured width of the exit section of the finishing mill
and the target width when the measured width of the exit section of the finishing
mill is greater than the target width.
1. Vorrichtung mit einer Breitenregelungseinrichtung und einer einzelnen kontinuierlichen
Walzprozesslinie zwischen in einer Miniwalzanlage erfolgendem Stranggießen und Warmwalzen,
die eine Stranggießanlage (CC), ein Vorwalzwerk (RM), eine Aufheizvorrichtung (HD)
und ein Fertigwalzwerk (FM) umfasst, wobei die Breitenregelungseinrichtung aufweist:
eine Zugspannungsregelungseinheit (4), welche die Zugspannung, die an ein Band zwischen dem Vorwalzwerk (RM) und dem Fertigwalzwerk (FM) angelegt wird, so regelt, dass sie einen Zielzugspannungswert hat;
eine Breitenmesseinheit (3) die eine Breite eines Austrittsabschnitts des Fertigwalzwerks misst; und
eine Breitenregelungseinheit (5), die eine Regelung so durchführt, dass der Zielzugspannungswert verändert wird, wenn sich die gemessene Breite des Austrittsabschnitts des Fertigwalzwerks von einer Zielbreite unterscheidet.
2. Breitenregelungseinrichtung nach Anspruch 1, wobei die Zugspannungsregelungseinheit
einen Zugspannungsmessabschnitt aufweist, der die Zugspannung misst, die an das Band
zwischen dem Vorwalzwerk und dem Fertigwalzwerk angelegt wird.
3. Breitenregelungseinrichtung nach Anspruch 1, wobei die Zugspannungsregelungseinheit
die Zugspannung, die an das Band zwischen dem Vorwalzwerk und dem Fertigwalzwerk angelegt
wird, anhand einer Walzbelastung des Vorwalzwerks, eines Motordrehmoments oder eines
Messwerts einer an das Band zwischen Gerüsten angelegten Zugspannung schätzt.
4. Breitenregelungseinrichtung nach Anspruch 1, wobei, wenn eine gemessene Breite des
Austrittsabschnitts des Fertigwalzwerks kleiner ist als die Zielbreite, die Breitenregelungseinheit
die Zugspannungsregelungseinheit so regelt, dass der Zielzugspannungswert in Proportion
zu einem Unterschied zwischen der gemessenen Breite des Austrittsabschnitts des Fertigwalzwerks
und der Zielbreite gesenkt wird.
5. Breitenregelungseinrichtung nach Anspruch 1, wobei, wenn die gemessene Breite des
Austrittsabschnitts des Fertigwalzwerks größer ist als die Zielbreite, die Breitenregelungseinheit
die Zugspannungsregelungseinheit so regelt, dass der Zielzugspannungswert in Proportion
zu einem Unterschied zwischen der gemessenen Breite des Austrittsabschnitts des Fertigwalzwerks
und der Zielbreite erhöht wird.
6. Breitenregelungsverfahren in einer einzelnen kontinuierlichen Walzprozesslinie zwischen
in einer Miniwalzanlage erfolgendem Stranggießen und Warmwalzen, die eine Stranggießanlage
(CC), ein Vorwalzwerk (RM), eine Aufheizvorrichtung (HD) und ein Fertigwalzwerk (FM)
umfasst, wobei das Verfahren umfasst:
Messen einer Breite eines Austrittsabschnitts des Fertigwalzwerks;
Messen oder Schätzen einer Zugspannung, die auf ein Band zwischen einem Vorwalzwerk und einem Fertigwalzwerk aufgebracht wird;
Durchführen einer Regelung derart, dass die gemessene oder geschätzte Zugspannung einen Zielzugspannungswert hat; und
Ändern des Zielzugspannungswerts, wenn sich die gemessene Breite des Austrittsabschnitts des Fertigwalzwerks von einer Zielbreite unterscheidet.
7. Breitenregelungsverfahren nach Anspruch 6, darüber hinaus umfassend:
Messen einer Breite eines Austrittsabschnitts des Fertigwalzwerks;
Ändern des Zielzugspannungswerts, wenn sich die gemessene Breite des Austrittsabschnitts des Fertigwalzwerks von einer Zielbreite unterscheidet.
8. Breitenregelungsverfahren nach Anspruch 6, wobei das Messen oder Schätzen der Zugspannung,
die auf das Band zwischen dem Vorwalzwerk und dem Fertigwalzwerk aufgebracht wird,
dadurch erfolgt, dass die Zugspannung, die auf das Band zwischen dem Vorwalzwerk und
dem Fertigwalzwerk aufgebracht wird, anhand einer Walzbelastung des Vorwalzwerks,
eines Motordrehmoments oder eines Messwerts einer an das Band zwischen Gerüsten angelegten
Zugspannung geschätzt wird.
9. Breitenregelungsverfahren nach Anspruch 7, wobei das Ändern des Zielzugspannungswerts,
das erfolgt, wenn sich die gemessene Breite des Austrittsabschnitts des Fertigwalzwerks
von der Zielbreite unterscheidet, dadurch erfolgt, dass der Zielzugspannungswert in
Proportion zu einem Unterschied zwischen der gemessenen Breite des Austrittsabschnitts
des Fertigwalzwerks und der Zielbreite gesenkt wird, wenn die gemessene Breite des
Austrittsabschnitts des Fertigwalzwerks kleiner ist als die Zielbreite.
10. Breitenregelungsverfahren nach Anspruch 7, wobei das Ändern des Zielzugspannungswerts,
das erfolgt, wenn sich die gemessene Breite des Austrittsabschnitts des Fertigwalzwerks
von der Zielbreite unterscheidet, dadurch erfolgt, dass der Zielzugspannungswert in
Proportion zu einem Unterschied zwischen der gemessenen Breite des Austrittsabschnitts
des Fertigwalzwerks und der Zielbreite erhöht wird, wenn die gemessene Breite des
Austrittsabschnitts des Fertigwalzwerks größer ist als die Zielbreite.
1. Appareil comprenant un appareil de régulation de largeur et une ligne de processus
de laminage continu simple entre coulée continue et laminage à chaud effectué dans
un mini-laminoir incluant une machine de coulée continue (CC), un laminoir dégrossisseur
(RM), un dispositif de chauffage (HD) et un laminoir finisseur (FM), l'appareil de
régulation de largeur comprenant :
une unité de régulation de tension (4) régulant une tension appliquée à une bande entre le laminoir dégrossisseur (RM) et le laminoir finisseur (FM) pour avoir une valeur de tension cible ;
une unité de mesure de largeur (3) mesurant une largeur d'une section de sortie du laminoir finisseur ; et
une unité de régulation de largeur (5) effectuant une régulation de manière à changer la valeur de tension cible lorsque la largeur mesurée de la section de sortie du laminoir finisseur diffère d'une largeur cible.
2. L'appareil de régulation de largeur de la revendication 1, sachant que l'unité de
régulation de tension inclut une partie de mesure de tension mesurant la tension appliquée
à la bande entre le laminoir dégrossisseur et le laminoir finisseur.
3. L'appareil de régulation de largeur de la revendication 1, sachant que l'unité de
régulation de tension estime la tension appliquée à la bande entre le laminoir dégrossisseur
et le laminoir finisseur moyennant une charge de laminage du laminoir dégrossisseur,
un couple de moteur, ou une valeur de mesure d'une tension appliquée à la bande entre
des bâtis.
4. L'appareil de régulation de largeur de la revendication 1, sachant que lorsqu'une
largeur mesurée de la section de sortie du laminoir finisseur est plus petite que
la largeur cible, l'unité de régulation de largeur régule l'unité de régulation de
tension de façon à abaisser la valeur de tension cible en proportion à une différence
entre la largeur mesurée de la section de sortie du laminoir finisseur et la largeur
cible.
5. L'appareil de régulation de largeur de la revendication 1, sachant que lorsque la
largeur mesurée de la section de sortie du laminoir finisseur est plus grande que
la largeur cible, l'unité de régulation de largeur régule l'unité de régulation de
tension de façon à augmenter la valeur de tension cible en proportion à une différence
entre la largeur mesurée de la section de sortie du laminoir finisseur et la largeur
cible.
6. Procédé de régulation de largeur dans une ligne de processus de laminage continu simple
entre coulée continue et laminage à chaud dans un mini-laminoir incluant une machine
de coulée continue (CC), un laminoir dégrossisseur (RM), un dispositif de chauffage
(HD) et un laminoir finisseur (FM), le procédé comprenant :
la mesure d'une largeur d'une section de sortie du laminoir finisseur ;
la mesure ou l'estimation d'une tension appliquée à une bande entre un laminoir dégrossisseur et un laminoir finisseur ;
la mise en oeuvre d'une régulation de telle sorte que la tension mesurée ou estimée ait une valeur de tension cible ; et
le changement de la valeur de tension cible lorsque la largeur mesurée de la section de sortie du laminoir finisseur diffère d'une largeur cible.
7. Le procédé de régulation de largeur de la revendication 6, comprenant en outre :
la mesure d'une largeur d'une section de sortie du laminoir finisseur ; et
le changement de la valeur de tension cible lorsque la largeur mesurée de la section de sortie du laminoir finisseur diffère d'une largeur cible.
8. Le procédé de régulation de largeur de la revendication 6, sachant que la mesure ou
l'estimation de la tension appliquée à la bande entre le laminoir dégrossisseur et
le laminoir finisseur est effectuée en estimant la tension appliquée à la bande entre
le laminoir dégrossisseur et le laminoir finisseur moyennant une charge de laminage
du laminoir dégrossisseur, un couple de moteur, ou une valeur mesurée d'une tension
appliquée à une bande entre des bâtis.
9. Le procédé de régulation de largeur de la revendication 7, sachant que le changement
de la valeur de tension cible effectué lorsque la largeur mesurée de la section de
sortie du laminoir finisseur diffère de la largeur cible est effectué en abaissant
la valeur de tension cible en proportion à une différence entre la largeur mesurée
de la section de sortie du laminoir finisseur et la largeur cible lorsque la largeur
mesurée de la section de sortie du laminoir finisseur est plus petite que la largeur
cible.
10. Le procédé de régulation de largeur de la revendication 7, sachant que le changement
de la valeur de tension cible effectué lorsque la largeur mesurée de la section de
sortie du laminoir finisseur diffère de la largeur cible est effectué en augmentant
la valeur de tension cible en proportion à une différence entre la largeur mesurée
de la section de sortie du laminoir finisseur et la largeur cible lorsque la largeur
mesurée de la section de sortie du laminoir finisseur est plus grande que la largeur
cible.
REFERENCES CITED IN THE DESCRIPTION
This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.
Patent documents cited in the description