EP0811435B1 - Voreinstellung für Kaltwalzreversiergerüst - Google Patents

Voreinstellung für Kaltwalzreversiergerüst Download PDF

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Publication number
EP0811435B1
EP0811435B1 EP97108853A EP97108853A EP0811435B1 EP 0811435 B1 EP0811435 B1 EP 0811435B1 EP 97108853 A EP97108853 A EP 97108853A EP 97108853 A EP97108853 A EP 97108853A EP 0811435 B1 EP0811435 B1 EP 0811435B1
Authority
EP
European Patent Office
Prior art keywords
data
strip
actuator position
coil
actuator
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.)
Expired - Lifetime
Application number
EP97108853A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0811435A2 (de
EP0811435A3 (de
Inventor
Eberhard Dr. Neuschütz
Gert Mücke
Roger Lathe
Frank Gorgels
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.)
BETR FORSCH INST ANGEW FORSCH
BFI VDEH Institut fuer Angewandte Forschung GmbH
Original Assignee
BETR FORSCH INST ANGEW FORSCH
BFI VDEH Institut fuer Angewandte Forschung GmbH
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
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Application filed by BETR FORSCH INST ANGEW FORSCH, BFI VDEH Institut fuer Angewandte Forschung GmbH filed Critical BETR FORSCH INST ANGEW FORSCH
Publication of EP0811435A2 publication Critical patent/EP0811435A2/de
Publication of EP0811435A3 publication Critical patent/EP0811435A3/de
Application granted granted Critical
Publication of EP0811435B1 publication Critical patent/EP0811435B1/de
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
    • 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
    • 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
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • 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
    • B21B1/22—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 plates, strips, bands or sheets of indefinite length
    • B21B1/30—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 plates, strips, bands or sheets of indefinite length in a non-continuous process
    • B21B1/32—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 plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
    • B21B1/36—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 plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by cold-rolling
    • 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
    • B21B2265/00—Forming parameters
    • B21B2265/22—Pass schedule
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2271/00—Mill stand parameters
    • B21B2271/02—Roll gap, screw-down position, draft position

Definitions

  • the invention relates to a method for presetting the actuator positions of the band flatness at one Reversing stand or a rolling mill for the first Stitch of a new coil during cold rolling of strips especially made of stainless steel. It also affects one Procedure for presetting the controlled actuator positions the band flatness in a reversing stand or a rolling mill for restarting after one Standstill, for example with a new stitch or a roll change.
  • German patent application 44 21 005 describes a device for controlling the rolling, especially the cold rolling of stainless steel, in which Forming and plant technology restrictions for Rolling measurements outgoing design of a smooth operation and a flawless Rolled goods must be observed.
  • the roller system In With regard to a specific tape to be exercised Force set.
  • the actuator positions opposed to the roller system with regard to a certain geometry of the roll gap is set.
  • the default size depends on the tape dimensions given at the start of the stitch, i.e. the strip thickness and width, the respective material and the cross-sectional decrease.
  • the default of Reversing stand or the rolling train through the waltz can deviate significantly from operational requirements.
  • With the same rolling program are considerable individual differences when setting the Rolling parameters in the initial phase of a roll pass possible. The reason for this lies in one Overtaxing the helmsman as a result of the large number the control measures to be carried out, as well as in a different individual assessment of the Rolling events. It is therefore unavoidable that beginning and end of the band in their geometric Properties, mainly the strip thickness and flatness, from the stationary rolled middle section of the strip distinguish and therefore go to the scrap.
  • the invention is based on the problem, both the Presetting the for a new coil as well as for a cold rolled coil - after a roll stop before the next stitch or when changing the roller Automate actuator positions of the band flatness.
  • the band flatness preset of the respective roll stand for the first pass of a new one Coils even without knowledge of the existing one at the start of the stitch Strip or thickness profile of the hot strip may be possible.
  • the solution for a current coil is that according to the invention as actuator positions for the strip flatness the corresponding actual data of the first stitch a reference coil selected from n coils previously rolled are used, whose reference data, namely the scaffold setting, band flatness and coil data, the best match with the target data of the current Coils and that one each from the data of the individual actual reference state plus one of the Difference between the data of the reference state and the Target state dependent actuator change formed Actuator position is used.
  • n 1,2, ...
  • the current coil is based on that historical record rolled, the largest Flatness similarity to the target state.
  • the solution is that the actuator position for the Strip flatness based on the corresponding actual data, that existed immediately before the standstill and that each one from the data of the individual Actual reference state plus one of the difference the data of the reference state and the target state dependent actuator change formed Actuator position is used. This allows the resulting inevitably with each stitch Strain hardening of the strip to be taken into account has the same effect as if another material was rolled would.
  • the actuators for the strip flatness are automatically preset.
  • a reference state with actual data from one or from the previous one Process For this, n previously rolled coils are considered and the coil used for comparison, whose Reference data the target data of the current coil on come next.
  • process data of the reference coil For the band flatness, for example: Rolling force, strip tension, inlet and outlet thickness, position of the Flatness actuators and roller geometry.
  • the knowledge of the thickness profile of the current Coils not required.
  • the roll gap can be also adjust an unknown band profile. Which is very advantageous because the strip should do that during cold rolling Keep the profile it had from hot rolling; a Profile change during cold rolling would cause waves in the strip to lead. If the strip thickness profile is known, it can however also when determining the actuator positions be taken into account.
  • the invention relates to an automatic system for the unsteady rolling phase both with a new coil and even after a standstill.
  • the invention can be used as reference data for the first stitch of a new coils, the actual data from the start of the last n rolled coils from a category Data collection can be taken.
  • the categories are for example: quality, bandwidth and strip thickness.
  • the scaffold adjustment, band flatness and material data the best match with the Target state of the new coil. This gives also an automatic adaptation of changes that during long rolling operations, for example Long-term change in the hot strip thickness profile to adjust.
  • the invention further relates to a method for Presetting the strip thickness for a reversing stand or a rolling mill for a new coil or the next stitch of a rolled coil at each Cold rolling of strips, in particular made of stainless steel.
  • the the underlying problem is that at every stitch start required actuator positions of the strip thickness automate.
  • the roll stand should start at the start of the stitch are automatically set to a roll thickness that is maintained exactly during the steady state.
  • the strip thickness presetting of the respective roll stand for the first pass of a new one Coils even without knowledge of the existing one at the start of the stitch Strip or thickness profile of the hot strip may be possible.
  • the solution is to preset the strip thickness preferred in the context of the invention in that the strip thickness by specifying one over a period of time from the actual data of reference states of the respective Roll stand adapted rolling force or position is preset.
  • the tape thickness is preferred over the default a predetermined rolling force or the default preset a predetermined position.
  • the flow curves should be used to determine the default data over a certain previous period from the current process data for the respective roll stand be adapted. This ensures that too practical with an as yet unknown thickness profile of the tape immediately at the start of the stitch, the tape thickness which is also set in the stationary area is rolled. Because of the automatic fall time consuming Start-up processes are gone, process disruptions such as belt breaks practically excluded.
  • Table 1 shows the reference state for the various Events, namely for rolling a new one Coils or for restarting after a standstill of the mill stand.
  • Actual data from the start of the stitch of a coil are the same Category, for example quality, bandwidth and Strip thickness, that from the last n rolled coils was selected.
  • after a standstill e.g. with every new stitch or when changing the reel serve as reference data the actual data that immediately accumulated on the same coil prior to standstill.
  • the reference state determined in this way (the individual values or value examples are given in Table 1) together with the target state (also here are the individual data given in Table 1) one Arithmetic algorithm fed to the actuator positions for the flatness of the tape.
  • the actuator positions according to the invention determined that itself from the actuator position of the reference state plus the calculated actuator change. According to Table 2, the calculation is carried out on-line at Use of a roll gap model. The calculation of the new actuator positions are to be carried out iteratively. The If necessary, the iteration is ended when the Difference in actuator positions for the current iteration step to the actuator positions of the previous one Step a certain, predetermined Limit falls below This limit is oriented the position accuracy of the actuator.
  • Table 4 illustrates an implementation scheme of the Method for determining the rolling force to be specified or position to achieve the desired Target outlet thickness taking into account a reference condition.
  • the target state is defined by: the Inlet thickness of the strip, the target outlet thickness and the Belt tension.
  • the values of the Reference state - preferably online - via a Influence function depending on the measured values of the Reference state, e.g. rolling force / position, Corrected inlet thickness, outlet thickness and belt tension.
  • the result is the rolling force to be specified or position with which the belt with each new Stitch, even at the first stitch, is rolled automatically.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
EP97108853A 1996-06-07 1997-06-03 Voreinstellung für Kaltwalzreversiergerüst Expired - Lifetime EP0811435B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19622825A DE19622825B4 (de) 1996-06-07 1996-06-07 Voreinstellung für Kaltwalzreversiergerüst
DE19622825 1996-06-07

Publications (3)

Publication Number Publication Date
EP0811435A2 EP0811435A2 (de) 1997-12-10
EP0811435A3 EP0811435A3 (de) 1998-05-06
EP0811435B1 true EP0811435B1 (de) 2001-09-05

Family

ID=7796361

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97108853A Expired - Lifetime EP0811435B1 (de) 1996-06-07 1997-06-03 Voreinstellung für Kaltwalzreversiergerüst

Country Status (4)

Country Link
US (1) US5987948A (ja)
EP (1) EP0811435B1 (ja)
JP (1) JP3996976B2 (ja)
DE (1) DE19622825B4 (ja)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19831480C1 (de) * 1998-07-14 2000-01-13 Schloemann Siemag Ag Verfahren zum Voreinstellen von Kaltverformungsanlagen
DE19851554C2 (de) * 1998-11-09 2001-02-01 Siemens Ag Verfahren und Einrichtung zur Voreinstellung einer Walzstraße
DE19900428A1 (de) * 1999-01-08 2000-07-13 Sms Demag Ag Walzstraße zum Walzen von stabförmigem Walzgut, z. B. Stabstahl oder Draht
ATE255964T1 (de) * 1999-12-23 2003-12-15 Abb Ab Verfahren und vorrichtung zur planheitsregelung
DE10106584A1 (de) 2001-02-13 2002-09-19 Siemens Ag Verfahren und Vorrichtung zur Voreinstellung von Prozessgrößen einer Walzstraße zum Walzen von Metallbändern
US8707529B2 (en) * 2008-12-11 2014-04-29 The Material Works, Ltd. Method and apparatus for breaking scale from sheet metal with recoiler tension and rollers adapted to generate scale breaking wrap angles
EP2527052A1 (de) * 2011-05-24 2012-11-28 Siemens Aktiengesellschaft Betriebsverfahren für eine Walzstraße
CN102688896B (zh) * 2012-05-16 2014-04-16 燕山大学 四辊冷连轧机组基于机理模型的虚拟凸度仪设定方法
WO2023146701A1 (en) * 2022-01-27 2023-08-03 Novelis Inc. System and method for controlling threading in a rolling mill

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57137014A (en) * 1981-02-17 1982-08-24 Sumitomo Metal Ind Ltd Controlling method for flatness of steel plate by variable crown roll
JPH0653283B2 (ja) * 1986-04-02 1994-07-20 株式会社日立製作所 圧延機における適応制御方法
US4745556A (en) * 1986-07-01 1988-05-17 T. Sendzimir, Inc. Rolling mill management system
NL8700776A (nl) * 1987-04-02 1988-11-01 Hoogovens Groep Bv Werkwijze voor het voorinstellen van een walserij en een besturingsinrichting geschikt daarvoor.
JPS6478612A (en) * 1987-09-21 1989-03-24 Kobe Steel Ltd Arithmetic unit for gap between rolls of multistage rolling mill
SU1547898A1 (ru) * 1988-06-07 1990-03-07 Киевский институт автоматики им.ХХУ съезда КПСС Способ автоматического управлени комплексом механических свойств прокатываемых стальных листов и система дл его осуществлени
US5054302A (en) * 1989-04-07 1991-10-08 Kawasaki Steel Corporation Hardness compensated thickness control method for wet skin-pass rolled sheet
DE4040360A1 (de) * 1990-12-17 1991-06-27 Siemens Ag Regelung eines mehrgeruestigen warm- und/oder kaltband-walzwerks
JPH05138220A (ja) * 1991-11-22 1993-06-01 Hitachi Ltd 連続圧延機の板有零調装置及び方法
US5680784A (en) * 1994-03-11 1997-10-28 Kawasaki Steel Corporation Method of controlling form of strip in rolling mill
JP2677964B2 (ja) * 1994-03-11 1997-11-17 川崎製鉄株式会社 圧延機の形状制御初期設定方法
DE4421005B4 (de) * 1994-06-18 2007-09-27 Betriebsforschungsinstitut VDEh - Institut für angewandte Forschung GmbH Vorrichtung zur Steuerung des Walzens
JPH0824927A (ja) * 1994-07-18 1996-01-30 Nisshin Steel Co Ltd 金属帯の圧延形状の自動制御方法および装置
US5609053A (en) * 1994-08-22 1997-03-11 Alcan Aluminum Corporation Constant reduction multi-stand hot rolling mill set-up method
DE19545262B4 (de) * 1995-11-25 2004-08-05 Alstom Power Conversion Gmbh Einrichtung zum Betrieb einer mehrgerüstigen Walzstraße

Also Published As

Publication number Publication date
US5987948A (en) 1999-11-23
JP3996976B2 (ja) 2007-10-24
DE19622825A1 (de) 1997-12-11
EP0811435A2 (de) 1997-12-10
EP0811435A3 (de) 1998-05-06
DE19622825B4 (de) 2005-03-31
JPH1052706A (ja) 1998-02-24

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