EP0734795A1 - Procédé et dispositif pour la régulation à action directe d'épaisseur dans le laminage de feuillards - Google Patents

Procédé et dispositif pour la régulation à action directe d'épaisseur dans le laminage de feuillards Download PDF

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Publication number
EP0734795A1
EP0734795A1 EP96104291A EP96104291A EP0734795A1 EP 0734795 A1 EP0734795 A1 EP 0734795A1 EP 96104291 A EP96104291 A EP 96104291A EP 96104291 A EP96104291 A EP 96104291A EP 0734795 A1 EP0734795 A1 EP 0734795A1
Authority
EP
European Patent Office
Prior art keywords
rolling
thickness
decoiler
film
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96104291A
Other languages
German (de)
English (en)
Other versions
EP0734795B1 (fr
Inventor
Hans-Georg Hartung
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Schloemann Siemag AG
Schloemann Siemag 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 SMS Schloemann Siemag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Publication of EP0734795A1 publication Critical patent/EP0734795A1/fr
Application granted granted Critical
Publication of EP0734795B1 publication Critical patent/EP0734795B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/165—Control of thickness, width, diameter or other transverse dimensions responsive mainly to the measured thickness of the 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
    • 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
    • B21B1/40—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 foils which present special problems, e.g. because of thinness
    • 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
    • B21B2265/04—Front or inlet tension
    • 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

Definitions

  • the invention relates to a method and an apparatus for thickness pre-control in film rolling with the aid of the characteristic curves of the individual manipulated variables (e.g. strip pulls, rolling speeds) stored in a process computer for different working points (operating states) or with the aid of an on-line physical computing model, also in combination with a monitor control.
  • the individual manipulated variables e.g. strip pulls, rolling speeds
  • the process computer for different working points (operating states) or with the aid of an on-line physical computing model, also in combination with a monitor control.
  • the thickness during film rolling can no longer be controlled with the aid of a position control, since this fails due to the extraordinarily high strip modulus of the film, which also precludes the use of a thickness precontrol, which is customary in strip rolling and with which a thickness error can be reached in good time can change the rolling force or the position of the employment so that the outlet thickness remains as unchanged as possible.
  • film rolling is only regulated by means of a combined retraction tension / rolling speed control.
  • the mode of operation of the tension / speed control is based on a change in the resistance to deformation of the film, so that different decreases can be set with a constant rolling force.
  • the invention is therefore based on the object of providing a method and a device of the type mentioned at the outset with which the consequences of a thickness deviation on the inlet side can be compensated for more quickly and better.
  • This object is achieved for the method in that thickness deviations of the film are determined on the inlet side and compensated for by a thickness precontrol.
  • the invention is based here on the knowledge gained both from practical experience and from theoretical studies that a good approximation of a deviation in the thickness of the film on the inlet side can be determined directly proportional to the reduction on the outlet side. Therefore, knowledge of the effects of a change in rolling parameters, obtained empirically or determined with the aid of a physico-mathematical calculation model, makes the thickness precontrol according to the invention possible for film rolling, i.e. a timely intervention in the rolling process in order not only to react to a measured thickness error with the monitor control, but to largely avoid it in advance.
  • the rolling speed and / or the tension or retraction tension be changed, but preferably, under otherwise constant conditions, the strip retraction tension by a highly dynamic traction means, preferably a highly dynamic decoiler, depending on the operating point.
  • the retraction voltage is the most effective manipulated variable for influencing the film thickness. While knowledge of the performance characteristics for classical film thickness control is advantageous but not absolutely necessary, it is assumed here that the effect of a manipulated variable change for the correct measurement of the pilot control step is known exactly have to be.
  • the dependencies of the effects of a change in the inlet thickness on the manipulated variable, preferably the retraction voltage are determined at various operating points and stored in the process computer for the thickness control.
  • An operating point is defined by a certain combination of process parameters, e.g. Outlet thickness, rolling speed, preferred tension, roller diameter or lubrication.
  • the characteristic curves of the individual manipulated variables for various operating points are stored in the process computer and the characteristic curve that is valid for the actually prevailing operating state is obtained interpolatively from the family of characteristic curves stored in the process computer for different operating points (operating states).
  • the difference quotient of the corresponding manipulated variable can then be determined from the characteristic curve itself. Alternatively, the difference quotients can also be determined directly using an online physical model.
  • the regulation according to the invention by means of thickness precontrol is also able to evaluate whether a precontrol intervention or a possibly necessary intervention of a downstream thickness regulation with a certain manipulated variable is still possible or sensible. If, for example, the difference quotient tends towards infinity, this means that the manipulated variable has no effect and another manipulated variable must be used, for example the outlet tension or the rolling force in film rolling, the effect of which can be seen more indirectly through a shift in the working point .
  • a device for carrying out the thickness precontrol according to the invention provides that between the decoiler and the rolling mill / the roll gap of the roll stand, a thickness measuring device connected to a higher-level process computer and this is followed by a change in the path of the film strip between the decoiler and the roll gap, e.g. extending traction means are arranged.
  • a loop-forming brake and / or tension frame could be used, for example, as a traction means that changes the path length, but an advantageously force-controlled or position-controlled, hydraulically adjustable control roller is preferably proposed, for example the middle roller of a 3-roller bridge. This is because there is a highly dynamic traction device required for the timely changing of the retraction voltage; alternatively, the decoiler could also be used.
  • the force or position-controlled control roller immersed in the strip run of the film to be rolled in front of the roll stand causes a change in the distance between the decoiler or the film strip bundle and the roll gap, i.e. an elastic change in the length of the film strip and, correspondingly, a change in tension depending on the working point.
  • the thickness measuring device arranged for measuring the inlet thickness between the decoiler and the roll gap can be of a commercial type.
  • the control roller can be returned to the neutral position by changing the retraction voltage setpoint and carrying the retraction voltage control window.
  • the method can also be carried out directly using a highly dynamic reel.
  • FIG. 1 shows a diagram of a system 1 for rolling a film or a film strip 2.
  • the film strip 2 is drawn off from a collar 3 of a decoiler 4 and fed to the roll gap 5 of a roll stand 6 of a downstream rolling mill, not shown in detail.
  • the roll stand 6 consists of an upper and a lower support roll 7 and the associated work rolls 8.
  • a commercially available thickness measuring device 9 is arranged between the decoiler 4 and the rolling mill or stand 6 and is electrically connected to a superordinate process computer 10.
  • the thickness measuring device 9 is followed by a traction means 11 arranged in front of the roll stand 6 in the form of a 3-roller bridge composed of three rollers 12 or 13.
  • the middle roller 13 is designed as a force-controlled or position-controlled, hydraulically adjustable and also electrically connected to the process computer 10 control roller, which - as shown - dips into the film strip as required and influences the retraction tension by means of a change in the band loop 14.
  • the process computer 10 In order to pre-control the thickness of the film strip 2 before it enters the rolling stand 6, the process computer 10 has stored, using a calculation model or empirically determined effect characteristics of the individual manipulated variables for different operating points, or the effect of the Actuating variables are calculated online.
  • FIG. 2 shows another embodiment of a system 100 for rolling a film or a film strip 2.
  • the sequence largely corresponds to that of system 1 according to FIG. 1, with the exception that the rapid retraction changes necessary for the thickness control are not by means of an intermediate traction means , but can be made directly with a highly dynamic reel 16.
  • FIG. 3 An example of a thickness feedforward control in the system 1 or 100 according to FIG. 1 or FIG. 2, in order to compensate for an incoming change in film thickness with a constant outlet thickness (33 ⁇ m), constant rolling force (6000 kN) and constant rolling speed by suitably changing the retraction tension, is shown in the diagram of FIG. 3.
  • a thickness feedforward control in the system 1 or 100 according to FIG. 1 or FIG. 2 in order to compensate for an incoming change in film thickness with a constant outlet thickness (33 ⁇ m), constant rolling force (6000 kN) and constant rolling speed by suitably changing the retraction tension, is shown in the diagram of FIG. 3.
  • an increase in the inlet thickness of the film strip 2 from 72 ⁇ m to 74 ⁇ m is assumed.
  • the control roller 13 of the traction means 11 is lowered into the tape run of the film 2 as shown in FIG. 1, so that an elastic change in length of the film tape 2 is brought about. This is done in a timely manner, ie with a high dynamic of the train change, which enables the adjustable, ie lowering and raising, control roller 13.
  • the thickness measuring device 9 arranged between the decoiler 4 and the roll gap 5 or roll stand 6, an additive and based on the characteristic curve and of the run-in thickness error reach the measured change in tension, so that with the described control a thickness error is avoided in advance or largely reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)
EP96104291A 1995-03-30 1996-03-19 Procédé pour la régulation à action directe d'épaisseur dans le laminage de feuillards Expired - Lifetime EP0734795B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19511801A DE19511801A1 (de) 1995-03-30 1995-03-30 Verfahren und Vorrichtung zur Dickenvorsteuerung beim Folienwalzen
DE19511801 1995-03-30

Publications (2)

Publication Number Publication Date
EP0734795A1 true EP0734795A1 (fr) 1996-10-02
EP0734795B1 EP0734795B1 (fr) 2000-01-26

Family

ID=7758235

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96104291A Expired - Lifetime EP0734795B1 (fr) 1995-03-30 1996-03-19 Procédé pour la régulation à action directe d'épaisseur dans le laminage de feuillards

Country Status (7)

Country Link
US (1) US5771724A (fr)
EP (1) EP0734795B1 (fr)
JP (1) JP3697313B2 (fr)
KR (1) KR100394489B1 (fr)
AT (1) ATE189140T1 (fr)
CA (1) CA2173049C (fr)
DE (2) DE19511801A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100775462B1 (ko) * 2001-09-05 2007-11-12 주식회사 포스코 슬라브 압연방법
DE102006008574A1 (de) * 2006-02-22 2007-08-30 Siemens Ag Verfahren zur Unterdrückung des Einflusses von Walzenexzentrizitäten
CN101934289B (zh) * 2009-06-30 2013-12-25 上海宝信软件股份有限公司 不锈钢冷连轧辊缝调整方法
CN104324951B (zh) * 2013-07-22 2016-08-24 宝山钢铁股份有限公司 单机架启动轧制力设定和控制方法
CN103801563A (zh) * 2014-01-22 2014-05-21 江苏亨特宏业重工有限公司 铝箔轧机定辊装置
CN104492828A (zh) * 2014-12-27 2015-04-08 陆余圣 一种用于轧制机的激光位移感应装置及其使用方法
TWI580489B (zh) * 2015-10-07 2017-05-01 Metal Ind Res And Dev Centre Sheet thickness precision control equipment
ITUB20169972A1 (it) * 2016-01-14 2017-07-14 Guasta Fabrizio Procedimento di laminazione di fogli di alluminio
CN115971250B (zh) * 2022-10-28 2025-07-01 中色科技股份有限公司 一种可逆式精密铜箔轧制生产线、生产工艺及张力控制方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57103724A (en) * 1980-12-19 1982-06-28 Hitachi Ltd Automatic thickness controlling system in metallic foil rolling mill
JPS57193216A (en) * 1981-05-26 1982-11-27 Toshiba Corp Plate thickness controlling method of rolling mill
US4548063A (en) * 1984-06-25 1985-10-22 General Electric Company Tension control in a metal rolling mill
JPS62104614A (ja) * 1985-10-31 1987-05-15 Nippon Steel Corp 圧延板厚制御方法
FR2628987A1 (fr) * 1988-03-25 1989-09-29 Ugine Aciers Dispositif de laminage a froid des toles minces et extra-minces
JPH0246918A (ja) * 1988-08-04 1990-02-16 Showa Alum Corp 圧延箔等の自動圧延制御方法
JPH02268913A (ja) * 1989-04-06 1990-11-02 Kobe Steel Ltd 入側張力変動吸収装置を備えた圧延機

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SU858955A1 (ru) * 1979-08-17 1981-08-30 за вители А,П. Грудев, А.Д. Размахнин, К. А. Ивано|в В.Г. Шув ков, В.А. Сорокин и Г.В. Фот 5с&. ::п:;;-/7-: Непрерывный прокатный стан
JPS5650709A (en) * 1979-09-29 1981-05-08 Sumitomo Metal Ind Ltd Preventing method for fluctuation of finished breadth in hot strip mill
JPS5841602A (ja) * 1981-09-03 1983-03-10 Sumitomo Metal Ind Ltd 冷間圧延方法
CH663555A5 (de) * 1984-02-06 1987-12-31 Escher Wyss Ag Verfahren und vorrichtung zum walzen von aluminium-folien.
IT1182868B (it) * 1985-09-20 1987-10-05 Randolph Norwood Mitchell Procedimento ed apparecchiatura per il controllo e/o correzione continua del profilo e planarita' di nastri metallici e simili
GB8621102D0 (en) * 1986-09-01 1986-10-08 Davy Mckee Sheffield Hot strip mill
JPH01181912A (ja) * 1988-01-12 1989-07-19 Kawasaki Steel Corp 難加工金属箔帯の圧延設備
GB8825714D0 (en) * 1988-11-03 1988-12-07 Davy Mckee Sheffield Hot rolling of metal strip
EP0376887B1 (fr) * 1988-12-30 1993-07-14 Alusuisse-Lonza Services Ag Procédé et dispositif pour régler la planéité d'une bande métallique laminée à froid
CN1040073C (zh) * 1989-12-25 1998-10-07 石川岛播磨重工业株式会社 轧机的板厚控制系统
JPH0639418A (ja) * 1992-07-22 1994-02-15 Yaskawa Electric Corp 自動板厚制御装置を有する圧延機の張力制御方法
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57103724A (en) * 1980-12-19 1982-06-28 Hitachi Ltd Automatic thickness controlling system in metallic foil rolling mill
JPS57193216A (en) * 1981-05-26 1982-11-27 Toshiba Corp Plate thickness controlling method of rolling mill
US4548063A (en) * 1984-06-25 1985-10-22 General Electric Company Tension control in a metal rolling mill
JPS62104614A (ja) * 1985-10-31 1987-05-15 Nippon Steel Corp 圧延板厚制御方法
FR2628987A1 (fr) * 1988-03-25 1989-09-29 Ugine Aciers Dispositif de laminage a froid des toles minces et extra-minces
JPH0246918A (ja) * 1988-08-04 1990-02-16 Showa Alum Corp 圧延箔等の自動圧延制御方法
JPH02268913A (ja) * 1989-04-06 1990-11-02 Kobe Steel Ltd 入側張力変動吸収装置を備えた圧延機

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P. BOUCHER ET AL: "Laminage à froid de toles minces: la régulation diminue le nombre de passes", REVUE GÈNÉRALE DE L ELECTRICITÉ, no. 11, December 1986 (1986-12-01), PARIS FR, pages 26 - 31, XP002007835 *
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Also Published As

Publication number Publication date
JPH08281313A (ja) 1996-10-29
CA2173049A1 (fr) 1996-10-01
KR100394489B1 (ko) 2003-12-24
US5771724A (en) 1998-06-30
DE19511801A1 (de) 1996-10-02
JP3697313B2 (ja) 2005-09-21
DE59604264D1 (de) 2000-03-02
EP0734795B1 (fr) 2000-01-26
KR960033578A (ko) 1996-10-22
ATE189140T1 (de) 2000-02-15
CA2173049C (fr) 2007-06-12

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