EP0969937A1 - Verfahren und einrichtung zur voreinstellung der planheit eines walzbandes - Google Patents
Verfahren und einrichtung zur voreinstellung der planheit eines walzbandesInfo
- Publication number
- EP0969937A1 EP0969937A1 EP98924012A EP98924012A EP0969937A1 EP 0969937 A1 EP0969937 A1 EP 0969937A1 EP 98924012 A EP98924012 A EP 98924012A EP 98924012 A EP98924012 A EP 98924012A EP 0969937 A1 EP0969937 A1 EP 0969937A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roll gap
- gap profile
- roll
- profile
- values
- 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
Links
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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
Definitions
- the invention relates to a method and a device for presetting the flatness of a rolled strip by presetting the roll gap profile of a rolling stand for rolling a rolled strip, in which the roll gap profile is influenced by manipulated values for the roll gap profile and in which the tension distribution is set via the roll gap profile, the Control values for the roll gap profile can be determined using a roll gap profile model that calculates the roll gap profile.
- control values for the roll gap profile is influenced, and in which the tension distribution is influenced via the roll gap profile, the control values for the roll gap profile are determined by means of a roll gap profile model that calculates the roll gap profile, the calculated roll gap profile or an equivalent size being corrected to a corrected value calculated roll gap profile is linked, and wherein the roll gap profile model is adapted or adapted to the actual roll gap profile of the roll stand by means of the correction value. It has been shown that a particularly precise presetting of the roll gap profile is achieved by means of this method.
- Roll gap profile compared with each other and based on this comparison, in particular by weighting with a learning function, a new, updated correction value is determined.
- the actual roll gap profile is determined from, in particular measured, values for the tension distribution.
- the determination of the actual roll gap profile from the tensile stress distribution is a particularly suitable method for determining the roll gap profile.
- the roll gap profile is first set in accordance with the control values for the roll gap profile, which are calculated using the roll gap profile model, and that
- the roll gap profile is then set in accordance with manipulated values for the roll gap profile, which are calculated using a flatness control.
- the flatness control takes over the setting of the manipulated values advantageously after the presence of measured values for the tension distribution or after excitation flatness control.
- the correction factor for the roll gap profile model is recalculated.
- the same measured values for the tension distribution as for the flatness control are advantageously used.
- the roll gap profile model can be corrected without additional measured values.
- Another advantage is that many measurement values are available for the correction of the roll gap profile model, so that a particularly good correction of the roll gap profile model is achieved.
- FIG. 1 shows the functional sequence of the method according to the invention for presetting the roll gap profile.
- FIG. 2 shows a flatness control.
- the roll gap profile of the control values c ac tuator is first according Kne- for the roll gap profile represents.
- the actuating values c ac tuacor are determined using the roll gap profile model 5 as a function of the specified strip profile c p and of target values ⁇ * for the tension distribution.
- the roll gap profile model 5 is adapted to the actual roll gap profile. To do this, the tension distribution ⁇ is first measured.
- the current strip profile c act uai is determined from the tension distribution ⁇ by means of a strip profile determination 2.
- Roll stand 1 The solid data flows, ie the data flows for ⁇ , c act uai / c SU ⁇ ⁇ k and k, relate to the adaptation of the roll gap profile model 5. This training advantageously takes place when the roll gap profile is regulated.
- FIG. 2 Such a control is shown in FIG. 2.
- Reference numeral 6 denotes a roll stand, the roll gap profile of which is set according to the actuating values c act uator, control by means of a flatness control 7 as a function of the tension distribution ⁇ and the target tension distribution ⁇ *.
- the task of the flatness control is to set all actuators which have an influence on the roll gap profile in such a way that the strip tension distribution corresponding to the required target curve is achieved as well as possible over the strip width.
- the different influencing factors, so-called actuator efficiencies, of the individual actuators on the roll gap profile must be taken into account.
- actuators there are a number of other influencing variables, the effect of which on the roll gap must be compensated for by the actuators.
- Cmod "Cm + C w - Ct + fr + Cp + k.
- An approximate value c sum , ps for the crown to be preset can be calculated from the approximately determined system influences and the target curve. This is referred to in the following total crow.
- c sp is the crown from the target curve. It represents the desired belt tension distribution.
- Csum is used as the default value c acCua tor for setting the
- This manipulated variable is the same that is used for this task with active control.
- C a tuator Sf ⁇ , ps SP ⁇ , ps + ef 2 , ps + SP2.ps + • • • + Gf n , ps Sp n , ps where - efi, p S are the effectiveness factors of the actuators at the time of presetting. These are to be determined from the current bundle data spi, ps are the manipulated values to be preset.
- a c actua tor can be achieved with i> l by an infinite number of control value combinations. Algorithms are therefore used to find suitable control value combinations to achieve Cacuaor, which result in the control value combinations using appropriate strategies.
- the fast actuator for bending is set to a positive value so that this actuator has sufficient control reserve both in the direction of positive and above all in the direction of negative bending. This value is only left if the crown to be set, ie the roll gap profile, cannot be reached in this way.
- the actual crown can be calculated as the total crown during the rolling operation. This is now dependent on the time t and on the thermal state of the framework:
- C m is the mechanical crown (the roll grinding), constant between 2 roll changes c w (t) the wear crow (the roll abrasion), depending on the rolled strip length and the rolling force c (t) the temperature crow (deformation due to change in the thermal state) , time-dependent
- Cactuator (t) ⁇ fi (Cd * SP ⁇ (t) + ⁇ f 2 (cd) * Sp 2 () +... + Ef n (Cd) * Spn (t) the sum crow set by the controller c act uator ( t) determine.
- the actual roll gap crown is determined via the current strip tension distribution, which is continuously measured by a tension measuring device.
- the formula for the determination from the belt tension distribution is:
- the correction value k contained in C sum (t) can thus be optimized.
- k is slowly learned using an integral controller:
- V LEA RN is advantageously 0.01 to 0.1.
- the correction value is learned, e.g., every 10 seconds.
- the correction value k is significantly different depending on the bundle and stand data such as strip thickness, strip width, work roll diameter and rolling force. However, since the exact functional relationships are not known, k
- (t) be learned for a series of individual, fixed base values; for values between these learned values, interpolate.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19713004 | 1997-03-27 | ||
DE19713004A DE19713004C2 (de) | 1997-03-27 | 1997-03-27 | Verfahren und Einrichtung zur Voreinstellung der Planheit eines Walzbandes |
PCT/DE1998/000774 WO1998043755A1 (de) | 1997-03-27 | 1998-03-16 | Verfahren und einrichtung zur voreinstellung der planheit eines walzbandes |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0969937A1 true EP0969937A1 (de) | 2000-01-12 |
EP0969937B1 EP0969937B1 (de) | 2003-01-08 |
Family
ID=7824866
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98924012A Revoked EP0969937B1 (de) | 1997-03-27 | 1998-03-16 | Verfahren und einrichtung zur voreinstellung der planheit eines walzbandes |
Country Status (5)
Country | Link |
---|---|
US (1) | US6438443B1 (de) |
EP (1) | EP0969937B1 (de) |
AT (1) | ATE230642T1 (de) |
DE (2) | DE19713004C2 (de) |
WO (1) | WO1998043755A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19851554C2 (de) * | 1998-11-09 | 2001-02-01 | Siemens Ag | Verfahren und Einrichtung zur Voreinstellung einer Walzstraße |
DE10049260B4 (de) * | 2000-10-05 | 2008-09-18 | ACHENBACH BUSCHHüTTEN GMBH | Verfahren zur Voreinstellung und Regelung der Planheit eines Walzbandes |
DE50101564D1 (de) | 2001-09-29 | 2004-04-01 | Achenbach Buschhuetten Gmbh | Verfahren zur Voreinstellung und Regelung der Bandplanheit beim flexiblen Einweg- und Reversierwalzen einer bandförmigen Materialbahn |
FI114413B (fi) * | 2002-03-18 | 2004-10-15 | Ville Jaervinen | Menetelmä nippivoiman määrittämiseksi ja nippivoiman tasaamiseksi kahden pyörivän telan välillä |
AT500764A1 (de) * | 2004-05-19 | 2006-03-15 | Voest Alpine Ind Anlagen | Verfahren zur berechnung der geometrischen form von walzgut |
DE102008015828A1 (de) * | 2007-09-26 | 2009-04-02 | Sms Demag Ag | Walzvorrichtung und Verfahren für deren Betrieb |
EP2527052A1 (de) * | 2011-05-24 | 2012-11-28 | Siemens Aktiengesellschaft | Betriebsverfahren für eine Walzstraße |
EP3461567A1 (de) * | 2017-10-02 | 2019-04-03 | Primetals Technologies Germany GmbH | Planheitsregelung mit optimierer |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3733878A (en) * | 1971-10-20 | 1973-05-22 | Aluminum Co Of America | Roll end relief for rolling mills |
DE3419261C3 (de) * | 1984-05-23 | 1994-12-15 | Achenbach Buschhuetten Gmbh | Walzenkühl- und/oder Schmiervorrichtung für Kaltbandwalzwerke, insbesondere Feinbandwalzwerke |
DE3431691C2 (de) * | 1984-08-29 | 1987-01-02 | Achenbach Buschhütten GmbH, 5910 Kreuztal | Vorrichtung zur Regelung der Planheit und der Dicke von Walzband in einem Mehrwalzen-Bandwalzgerüst |
JPS61209708A (ja) * | 1985-03-15 | 1986-09-18 | Mitsubishi Heavy Ind Ltd | 帯板クラウン制御方法 |
JPH069686B2 (ja) * | 1986-08-05 | 1994-02-09 | ズンドビガ− アイゼンヒユツテ マシ−ネンフアブリク グラ− ウント コンパニ− | 多ロ−ル圧延スタンド |
EP0460892B1 (de) | 1990-06-04 | 1996-09-04 | Hitachi, Ltd. | Steuerungsvorrichtung für die Steuerung einer gesteuerten Anlage und Steuerungsverfahren dafür |
JPH04167908A (ja) * | 1990-11-01 | 1992-06-16 | Toshiba Corp | 圧延機の設定装置 |
JPH04167910A (ja) * | 1990-11-01 | 1992-06-16 | Toshiba Corp | 圧延機の制御方法および装置 |
JPH06238311A (ja) * | 1993-02-18 | 1994-08-30 | Sumitomo Metal Ind Ltd | 圧延機のセットアップ方法 |
DE4416364B4 (de) * | 1993-05-17 | 2004-10-28 | Siemens Ag | Verfahren und Regeleinrichtung zur Regelung eines Prozesses |
DE4338615B4 (de) * | 1993-11-11 | 2005-10-13 | Siemens Ag | Verfahren und Vorrichtung zur Führung eines Prozesses in einem geregelten System |
DE19503363A1 (de) * | 1994-02-15 | 1995-09-07 | Siemens Ag | Einrichtung und Verfahren zum Regeln der Planheit und/oder Spannungsverteilung von gewalzten Metallbändern |
US5493885A (en) * | 1994-03-10 | 1996-02-27 | Kawasaki Steel Corporation | Method and apparatus for controlling rolling process in hot strip finish rolling mill |
JP2918797B2 (ja) * | 1995-01-25 | 1999-07-12 | 川崎製鉄株式会社 | 金属帯の形状制御装置 |
DE19642918C2 (de) * | 1996-10-17 | 2003-04-24 | Siemens Ag | System zur Berechnung des Enddickenprofils eines Walzbandes |
-
1997
- 1997-03-27 DE DE19713004A patent/DE19713004C2/de not_active Expired - Fee Related
-
1998
- 1998-03-16 DE DE59806867T patent/DE59806867D1/de not_active Revoked
- 1998-03-16 EP EP98924012A patent/EP0969937B1/de not_active Revoked
- 1998-03-16 US US09/381,725 patent/US6438443B1/en not_active Expired - Fee Related
- 1998-03-16 WO PCT/DE1998/000774 patent/WO1998043755A1/de not_active Application Discontinuation
- 1998-03-16 AT AT98924012T patent/ATE230642T1/de not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO9843755A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE19713004C2 (de) | 2002-10-24 |
EP0969937B1 (de) | 2003-01-08 |
DE59806867D1 (de) | 2003-02-13 |
DE19713004A1 (de) | 1999-06-24 |
US6438443B1 (en) | 2002-08-20 |
WO1998043755A1 (de) | 1998-10-08 |
ATE230642T1 (de) | 2003-01-15 |
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