EP2937151B1 - Apparatus and method for controlling width of a strip hot rolled in a direct endless hot rolling line between continuous casting and hot rolling - Google Patents

Apparatus and method for controlling width of a strip hot rolled in a direct endless hot rolling line between continuous casting and hot rolling 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
Authority
EP
European Patent Office
Prior art keywords
width
target
finishing mill
mill
tension
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.)
Not-in-force
Application number
EP13863865.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2937151A1 (en
EP2937151A4 (en
Inventor
Duk-Man Lee
Sung-Hyun Kim
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.)
Posco Holdings Inc
Original Assignee
Posco Co Ltd
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 Posco Co Ltd filed Critical Posco Co Ltd
Publication of EP2937151A1 publication Critical patent/EP2937151A1/en
Publication of EP2937151A4 publication Critical patent/EP2937151A4/en
Application granted granted Critical
Publication of EP2937151B1 publication Critical patent/EP2937151B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)
EP13863865.5A 2012-12-21 2013-11-22 Apparatus and method for controlling width of a strip hot rolled in a direct endless hot rolling line between continuous casting and hot rolling Not-in-force EP2937151B1 (en)

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

Publications (3)

Publication Number Publication Date
EP2937151A1 EP2937151A1 (en) 2015-10-28
EP2937151A4 EP2937151A4 (en) 2016-01-06
EP2937151B1 true EP2937151B1 (en) 2017-08-16

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ID=50978651

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13863865.5A Not-in-force EP2937151B1 (en) 2012-12-21 2013-11-22 Apparatus and method for controlling width of a strip hot rolled in a direct endless hot rolling line between continuous casting and hot rolling

Country Status (6)

Country Link
EP (1) EP2937151B1 (ru)
KR (1) KR101461734B1 (ru)
CN (1) CN104903016B (ru)
RU (1) RU2633164C2 (ru)
SA (1) SA113350059B1 (ru)
WO (1) WO2014098382A1 (ru)

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EP3000539B1 (de) * 2014-09-24 2016-11-16 SMS group GmbH VERFAHREN ZUM GIEßEN UND WALZEN EINES ENDLOSEN STRANGGUTES
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
CN105327951B (zh) * 2015-11-11 2018-01-09 张家港浦项不锈钢有限公司 一种不锈钢板七道次热轧生产时尾道次热轧辊缝宽度控制方法
JP6607318B2 (ja) * 2016-07-26 2019-11-20 東芝三菱電機産業システム株式会社 エッジャの制御装置
CN106475411A (zh) * 2016-11-28 2017-03-08 无锡市莱达热工工程有限公司 铝线连铸连轧机的连轧机构
CN108714629B (zh) * 2018-06-13 2020-04-21 武汉钢铁有限公司 一种热连轧卷取侧导板压力位置综合控制方法

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Also Published As

Publication number Publication date
RU2633164C2 (ru) 2017-10-11
EP2937151A1 (en) 2015-10-28
SA113350059B1 (ar) 2015-11-16
CN104903016A (zh) 2015-09-09
RU2015129809A (ru) 2017-01-30
WO2014098382A1 (ko) 2014-06-26
KR20140081578A (ko) 2014-07-01
KR101461734B1 (ko) 2014-11-14
CN104903016B (zh) 2019-10-22
EP2937151A4 (en) 2016-01-06

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