EP2937151B1 - Vorrichtung und verfahren zur regelung der breite eines in einer endlos arbeitenden direkten warmwalzstrasse zwischen dem stranggiessen und dem warmwalzen gewalzten bandes - Google Patents

Vorrichtung und verfahren zur regelung der breite eines in einer endlos arbeitenden direkten warmwalzstrasse zwischen dem stranggiessen und dem warmwalzen gewalzten bandes Download PDF

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Publication number
EP2937151B1
EP2937151B1 EP13863865.5A EP13863865A EP2937151B1 EP 2937151 B1 EP2937151 B1 EP 2937151B1 EP 13863865 A EP13863865 A EP 13863865A EP 2937151 B1 EP2937151 B1 EP 2937151B1
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EP
European Patent Office
Prior art keywords
width
target
finishing mill
mill
tension
Prior art date
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Not-in-force
Application number
EP13863865.5A
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English (en)
French (fr)
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EP2937151A4 (de
EP2937151A1 (de
Inventor
Duk-Man Lee
Sung-Hyun Kim
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Posco Holdings Inc
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Posco Co Ltd
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Publication date
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Publication of EP2937151A4 publication Critical patent/EP2937151A4/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
    • 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
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • 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
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/18—Automatic gauge 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
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/22—Lateral spread control; Width control, e.g. by edge rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/06—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged vertically, e.g. edgers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/02—Transverse dimensions
    • B21B2261/06—Width
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2265/00—Forming parameters
    • B21B2265/02—Tension
    • B21B2265/06—Interstand tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2265/00—Forming parameters
    • B21B2265/12—Rolling load or rolling pressure; roll force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2275/00—Mill drive parameters
    • B21B2275/10—Motor power; motor current
    • B21B2275/12—Roll torque
    • 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
    • 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
    • B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
    • 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
    • B21B38/06—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring tension or compression
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/004—Heating the product

Definitions

  • 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 .
  • Mini-mills are mills performing a process of melting scraps using an electrical furnace and then producing steel using continuous casting-rolling equipment.
  • 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.
  • continuous rolling is performed between continuous casting and hot rolling without ceasing.
  • 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.
  • 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.
  • Korean Patent Registration Publication No. 10-0957707 (Published May 4, 2010 ) may be provided.
  • 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.
  • An aspect of an embodiment may provide a method of controlling a width.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • a width control apparatus 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.
  • the width control apparatus includes a width measuring unit 3, a tension control unit 4 and a width control unit5.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • Width control may be performed through tension control performed by the tension control unit 4.
  • 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.
  • a width control apparatus may further include a width measuring unit 3 and a width control unit 5.
  • the width measuring unit 3 may measure a width of an exit section of the finishing mill.
  • the width control unit 5 may control the tension control unit 4 so as to change the target tension value.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the width control in the single continuous rolling process line between continuous casting and hot rolling 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.
  • 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.
  • a width thereof may be constantly controlled.
  • 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.
  • the width of the exit section of the finishing mill FM is greater than the target width, by about 10 to 20mm.
  • 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.
  • 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.
  • the width of the exit section of the roughing mill may first be reduced by about 3mm by increasing tension of the strip.
  • 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.
  • 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.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)

Claims (10)

  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.
EP13863865.5A 2012-12-21 2013-11-22 Vorrichtung und verfahren zur regelung der breite eines in einer endlos arbeitenden direkten warmwalzstrasse zwischen dem stranggiessen und dem warmwalzen gewalzten bandes Not-in-force EP2937151B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020120151493A KR101461734B1 (ko) 2012-12-21 2012-12-21 연주 및 열연 간 직결 연연속 압연 라인에서의 폭 제어장치 및 방법
PCT/KR2013/010692 WO2014098382A1 (ko) 2012-12-21 2013-11-22 연주 및 열연 간 직결 연연속 압연 라인에서의 폭 제어장치 및 방법

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EP2937151A1 EP2937151A1 (de) 2015-10-28
EP2937151A4 EP2937151A4 (de) 2016-01-06
EP2937151B1 true EP2937151B1 (de) 2017-08-16

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EP (1) EP2937151B1 (de)
KR (1) KR101461734B1 (de)
CN (1) CN104903016B (de)
RU (1) RU2633164C2 (de)
SA (1) SA113350059B1 (de)
WO (1) WO2014098382A1 (de)

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JP6641867B2 (ja) * 2015-10-09 2020-02-05 日本製鉄株式会社 消費電力量予測方法、装置及びプログラム
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RU2015129809A (ru) 2017-01-30
EP2937151A4 (de) 2016-01-06
KR101461734B1 (ko) 2014-11-14
SA113350059B1 (ar) 2015-11-16
KR20140081578A (ko) 2014-07-01
CN104903016B (zh) 2019-10-22
EP2937151A1 (de) 2015-10-28
WO2014098382A1 (ko) 2014-06-26
CN104903016A (zh) 2015-09-09
RU2633164C2 (ru) 2017-10-11

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