EP0173045B1 - Flatness control in strip rolling stands - Google Patents
Flatness control in strip rolling stands Download PDFInfo
- Publication number
- EP0173045B1 EP0173045B1 EP85108724A EP85108724A EP0173045B1 EP 0173045 B1 EP0173045 B1 EP 0173045B1 EP 85108724 A EP85108724 A EP 85108724A EP 85108724 A EP85108724 A EP 85108724A EP 0173045 B1 EP0173045 B1 EP 0173045B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- flatness
- flatness control
- rolling force
- rolling
- 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
Links
Images
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
-
- 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
- B21B2273/00—Path parameters
- B21B2273/12—End of product
Definitions
- the invention relates to a flatness control with measuring devices for determining the rolling force and change in rolling force as well as adjusting devices for controlling flatness errors equipped strip rolling stands according to the specification of manually or automatically retrievable target values and actual values determined by a measuring system and detecting the flatness.
- the rolling speeds are increased to the operating speeds only after the strip has been rolled on or after the threading phase.
- the change in the forming speed also leads to a change in the resistance to deformation, which has to be taken into account because a changing rolling speed causes a change in the rolling force.
- the thickness of the strip that is running out is changed if the thickness of the strip is not kept constant using the rolling force as a manipulated variable. Because the mere change in the rolling force does not take into account the changing elastic deformation of the work or support rollers of the stand, so that an impairment of the strip flatness can be expected due to the violation of the profile of the strip cross section, this is not sufficient for the quality requirements.
- the present invention has for its object to provide a flatness control for strip rolling stands, which ensures a constant flatness of the strip when changing the rolling force or the resistance to deformation of the strip to be rolled.
- a correction value determined theoretically by the change in the rolling force or determined by the series of measurements is applied to the control circuit of the flatness control by means of a precontrol.
- the control causes the inertia caused by the distance between the roll gap and the flatness measuring system known control systems switched off; the flatness errors are compensated for at the point of origin, so that the occurrence of changes in the flatness of the belt e.g. in the event of changes in speed is excluded.
- Changes in the flatness of the band with great timing, e.g. Changes in the profile of the supporting strip or thermal influences can advantageously still be countered with the known control concepts of the strip flatness control.
- the correction value is determined by means of a simulation curve, taking into account the structural dimensions of the roll stand, the width and the profile of the strip to be rolled, and the rolling force.
- the proposed method thus uses the change in the rolling force to pre-control the control loop of the flatness control by means of characteristic curves, in that a change in the bending force of the work, intermediate or support rolls is determined on the basis of the characteristic curves by a process computer, taking into account the strip geometry (profile and width of the incoming strip), with the stipulation that the rolling strip profile should be kept constant when the rolling force changes.
- the simulation calculation is carried out on the basis of pass schedule data with a computing model on an EDP system, with which, by comparing the theoretically determined strip profiles with the target strip profile, the manipulated variable is determined which leads to the best possible match between the target and actual strip profile curve of the rolling stock .
- the e.g. Value pairs of rolling force / bending force determined in this way can be graphically plotted according to strip width and passes.
- equilibrium straight line equations can also be determined and recorded, whereby it has been shown that the dependency on rolling force / bending force can be represented very well by a straight line equation in all examined cases.
- the strip rolling stand is equipped with a measuring device for detecting the rolling force Fw or the change in the rolling force ⁇ fw. Furthermore, the roll stand contains actuating devices 8 for the correction of flatness errors, as indicated in S, F B , Q and HC8.
- the known control loop consisted of the measuring system for the strip flatness, which is indicated at 6, the measured value of which was compared with target curves in the flatness control (indicated at 7) and, if necessary, a signal to the actuating devices for controlling flatness errors (indicated at 8) ).
- the operator was able to intervene in this control loop, as also indicated at 2, in order to correct flatness errors by changing the rolling force.
- the present invention provides to use the precontrol indicated at 9 in order to apply a correction value determined by rolling force change ⁇ Fw to the known control system by means of predetermined characteristic curves created by simulation calculation, with which flatness errors can be controlled without delay.
- the conventional control loop remains intact, so that changes in the strip flatness can still be compensated for by the conventional control loop with great timing.
- the feedforward control according to the invention although it can be used during the entire rolling process, is primarily suitable for compensating for changes in strip flatness during the threading-in phase when the strip is rolled on and during strip run-out by changes in speed.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Description
Die -Erfindung betrifft eine Planheitsregelung mit Messeinrichtungen zur Ermittlung der Walzkraft und Walzkraftänderung sowie Stelleinrichtungen zur Ausregelung von Planheitsfehlern ausgestatteten Bandwalzgerüsten nach Vorgabe von manuell oder automatisch abrufbaren SollWerten und durch ein Messsystem ermittelten, die Planheit erfassenden Ist-Werten.The invention relates to a flatness control with measuring devices for determining the rolling force and change in rolling force as well as adjusting devices for controlling flatness errors equipped strip rolling stands according to the specification of manually or automatically retrievable target values and actual values determined by a measuring system and detecting the flatness.
Beim Walzen von Flachmaterial wird erst nach dem Anwalzen des Bandes bzw. nach der Einfädelphase die Walzgeschwindigkeiten auf die Betriebsgeschwindigkeiten erhöht. Bei den meisten Werkstoffen tritt mit der Änderung der Umformgeschwindigkeit auch eine Änderung der Form- änderungsfestigkeit ein, die zu berücksichtigen ist, weil eine sich ändernde Walzgeschwindigkeit eine Änderung der Walzkraft hervorruft. Durch diese Änderung der Walzkraft wird die Dicke des auslaufenden Bandes verändert, wenn nicht mit Hilfe der Walzkraft als Stellgrösse die Dicke des Bandes konstant gehalten wird. Weil die blosse Veränderung der Walzkraft nicht die sich ändernde elastische Verformung der Arbeits- oder Stützwalzen des Gerüstes berücksichtigt, so dass aufgrund der Verletzung des Profils des Bandquerschnittes eine Beeinträchtigung der Bandplanheit zu erwarten ist, genügt dies für die gestellten Qualitätsanforderungen allein jedoch nicht.When rolling flat material, the rolling speeds are increased to the operating speeds only after the strip has been rolled on or after the threading phase. For most materials, the change in the forming speed also leads to a change in the resistance to deformation, which has to be taken into account because a changing rolling speed causes a change in the rolling force. As a result of this change in the rolling force, the thickness of the strip that is running out is changed if the thickness of the strip is not kept constant using the rolling force as a manipulated variable. Because the mere change in the rolling force does not take into account the changing elastic deformation of the work or support rollers of the stand, so that an impairment of the strip flatness can be expected due to the violation of the profile of the strip cross section, this is not sufficient for the quality requirements.
Es ist bekannt, dass durch geschlossene Regelkreise die Auswirkungen einer Walzkraftänderung auf die Bandplanheit ausgeregelt werden können, nachdem Planheitsfehler durch Planheitsmesssysteme erkannt sind. Solche Messsysteme beruhen auf der berührenden bzw. berührungslosen Ermittlung der Bandplanheit auf der Basis der Zugspannungsverteilung oder der Welligkeit des Bandes. Nachteilig ist es, dass die im Walzspalt erzeugten Änderungen der Bandplanheit aufgrund der Anordnung der Messsysteme erst im endlichen Abstand vom Walzspalt am auslaufenden Band gemessen werden können. Die bekannten Systeme sind zudem nur in der Lage, die im Walzspalt erzeugten Fehler integrierend zu erfassen, so dass die darauf beruhenden Regelkonzepte gegen kurzzeitige, bei Walzkraftänderungen z.B. aufgrund von Geschwindigkeits- änderungen oder Bandzugkraftschwankungen auftretende Fehler der Bandplanheit unempfindlich und ungeeignet sind. Aus diesem Grund werden beim Anwalzen bzw. beim Einfädeln des Bandes derart ausgerüstete Walzanlagen häufig ohne geschlossenen Regelkreis zur Planheitsregelung gefahren, d.h. der Bedienungsmann der Anlage greift, basierend auf seinen visuellen Eindrücken und Erfahrungen manuell in das System ein.It is known that the effects of a change in rolling force on the strip flatness can be corrected by closed control loops after flatness errors have been detected by flatness measuring systems. Such measuring systems are based on the contact or non-contact determination of the flatness of the strip on the basis of the tension distribution or the waviness of the strip. It is disadvantageous that the changes in strip flatness generated in the roll gap can only be measured at a finite distance from the roll gap on the emerging strip due to the arrangement of the measuring systems. The known systems are also only able to integrate the errors generated in the roll gap integrally, so that the control concepts based thereon against short-term, e.g. Belt flatness errors occurring due to speed changes or belt tension fluctuations are insensitive and unsuitable. For this reason, rolling mills equipped in this way when rolling or threading the strip are often operated without a closed control loop for flatness control, i.e. The operator of the system intervenes manually in the system based on his visual impressions and experiences.
Ausgehend von den vorstehend beschriebenen Problemen und Nachteilen bekannter Regelkonzepte liegt der vorliegenden Erfindung die Aufgabe zugrunde, eine Planheitsregelung für Bandwalzgerüste zu schaffen, die bei Änderung der Walzkraft bzw. des Umformwiderstandes des zu walzenden Bandes ein konstante Planheit des Bandes sicherstellt.Based on the problems and disadvantages of known control concepts described above, the present invention has for its object to provide a flatness control for strip rolling stands, which ensures a constant flatness of the strip when changing the rolling force or the resistance to deformation of the strip to be rolled.
Zur Lösung der Aufgabe wird erfindungsgemäss vorgeschlagen, dass dem Regelkreis der Planheitsregelung mittels einer Vorsteuerung ein durch die Walzkraftänderung bestimmter theoretisch oder durch Messreihen ermittelter Korrekturwert aufgeschaltet wird. Basierend auf der Erkenntnis, dass die Abhängigkeit zwischen der Walzkraft und der elastischen Verformung der Arbeits-, Zwischen- bzw. Stützwalzen und der plastischen Verformung des Walzgutes theoretisch mindestens näherungsweise ermittelbar ist, wird durch die Vorsteuerung die aufgrund des Abstandes zwischen Walzspalt und Planheitsmesssystem verursachte Trägheit bekannter Regelsysteme ausgeschaltet; die Planheitsfehler werden bereits am Ort ihres Entstehens kompensiert, so dass das Auftreten von Änderungen der Planheit des Bandes z.B. bei Geschwindigkeits- änderungen ausgeschlossen ist. Änderungen der Bandplanheit mit grossen Zeitverhalten, wie z.B. Änderungen des Profils des Vorbandes oderthermische Einflüsse, sind in vorteilhafter Weise weiterhin mit den bekannten Regelkonzepten der Bandplanheitsregelung zu begegnen.To achieve the object, it is proposed according to the invention that a correction value determined theoretically by the change in the rolling force or determined by the series of measurements is applied to the control circuit of the flatness control by means of a precontrol. Based on the knowledge that the dependency between the rolling force and the elastic deformation of the work, intermediate or back-up rolls and the plastic deformation of the rolling stock can theoretically be determined at least approximately, the control causes the inertia caused by the distance between the roll gap and the flatness measuring system known control systems switched off; the flatness errors are compensated for at the point of origin, so that the occurrence of changes in the flatness of the belt e.g. in the event of changes in speed is excluded. Changes in the flatness of the band with great timing, e.g. Changes in the profile of the supporting strip or thermal influences can advantageously still be countered with the known control concepts of the strip flatness control.
Nach einem besonders günstigen Merkmal der Erfindung ist vorgesehen, dass der Korrekturwert über eine unter Berücksichtigung der konstruktiven Abmessungen des Walzgerüstes, der Breite und des Profiles des zu walzenden Bandes und der Walzkraft durch Simulationsrechnung erstellte Kennlinie ermittelt wird. Das vorgeschlagene Verfahren verwendet somit die Änderung der Walzkraft zur Vorsteuerung des Regelkreises der Bandplanheitsregelung mittels Kennlinien, indem unter Berücksichtigung der Bandgeometrie (Profil und Breite des einlaufenden Bandes) eine Biegekraftänderung der Arbeits-, Zwischen- oder Stützwalzen anhand der Kennlinien durch einen Prozessrechner bestimmt wird, mit der Vorgabe, bei Walzkraftänderungen die Konstanz des auslaufenden Bandprofiles zu gewährleisten. Die Simulationsrechnung wird anhand von Stichplandaten mit einem Rechenmodell auf einer EDV Anlage durchgeführt, mit dem durch Vergleich der theoretische ermittelten Bandprofile mit dem Soll-Bandprofil durch Näherungsverfahren diejenige Stellgrösse ermittelt wird, die zu einer bestmöglichen Übereinstimmung von Soll- und Ist-Bandprofilkurve des Walzgutes führt. Die z.B. so ermittelten Wertepaare Walzkraft/Biegekraft können nach Bandbreite und Stichen sortiert graphisch aufgetragen werden. Mit Hilfe eines Rechners können weiterhin Ausgleichs-Geradengleichungen ermittelt und aufgezeichnet werden, wobei sich gezeigt hat, dass die Abhängigkeit Walzkraft/Biegekraft in allen untersuchten Fällen sehr gut durch eine Geradengleichung darstellbar ist.According to a particularly advantageous feature of the invention, it is provided that the correction value is determined by means of a simulation curve, taking into account the structural dimensions of the roll stand, the width and the profile of the strip to be rolled, and the rolling force. The proposed method thus uses the change in the rolling force to pre-control the control loop of the flatness control by means of characteristic curves, in that a change in the bending force of the work, intermediate or support rolls is determined on the basis of the characteristic curves by a process computer, taking into account the strip geometry (profile and width of the incoming strip), with the stipulation that the rolling strip profile should be kept constant when the rolling force changes. The simulation calculation is carried out on the basis of pass schedule data with a computing model on an EDP system, with which, by comparing the theoretically determined strip profiles with the target strip profile, the manipulated variable is determined which leads to the best possible match between the target and actual strip profile curve of the rolling stock . The e.g. Value pairs of rolling force / bending force determined in this way can be graphically plotted according to strip width and passes. With the help of a computer, equilibrium straight line equations can also be determined and recorded, whereby it has been shown that the dependency on rolling force / bending force can be represented very well by a straight line equation in all examined cases.
Nachfolgend wird die erfindungsgemässe Planheitsregelung anhand eines Block-Schaltbildes erläutert.The flatness control according to the invention is explained below on the basis of a block circuit diagram.
Mit 1 sind im dargestellten Block-Schaltbild die Arbeitswalzen eines Bandwalzgerüstes bezeichnet. Bei 3 ist eine Messrolle eines Messsystemes zur Erfassung der Bandplanheit bezeichnet, über die das ausgewalzte Band 4 geführt wird.With 1 are in the block diagram shown Work rolls of a strip mill called. At 3, a measuring roller of a measuring system for detecting the flatness of the strip is designated, over which the rolled strip 4 is guided.
Das Bandwalzgerüst ist, wie bei 5 angedeutet, mit einer Messeinrichtung zur Erfassung der Walzkraft Fw bzw. der Walzkraftänderung Δfw ausgestattet. Des weiteren enthält das Walzgerüst Stelleinrichtungen 8 zur Ausregelung von Planheitsfehlern, wie bei S, FB, Q und HC8 angedeutet ist.As indicated at 5, the strip rolling stand is equipped with a measuring device for detecting the rolling force Fw or the change in the rolling force Δfw. Furthermore, the roll stand contains actuating
Der bekannte Regelkreis bestand aus dem Messsystem für die Bandplanheit, das bei 6 angedeutet ist, dessen Messwert mit Soll-Kurven in der Planheitsregelung (bei 7 angedeutet), verglichen wurde und ggfs. ein Signal an die Stelleinrichtungen zur Ausregelung von Planheitsfehlern (bei 8 angedeutet), abgegeben wurde. In diesen Regelkreis konnte in der Anfahrphase des Bandes der Bedienungsmann, wie ebenfalls bei 2 angedeutet, eingreifen, um durch Veränderung der Walzkraft Planheitsfehler auszuregeln.The known control loop consisted of the measuring system for the strip flatness, which is indicated at 6, the measured value of which was compared with target curves in the flatness control (indicated at 7) and, if necessary, a signal to the actuating devices for controlling flatness errors (indicated at 8) ). In the start-up phase of the strip, the operator was able to intervene in this control loop, as also indicated at 2, in order to correct flatness errors by changing the rolling force.
Die vorliegende Erfindung sieht hingegen vor, die bei 9 angedeutete Vorsteuerung zu verwenden, um mittels vorgegebener, durch Simulationsrechnung erstellter Kennlinien einen durch Walzkraftänderung ΔFw bestimmten Korrekturwert dem bekannten Regelsystem aufzuschalten, mit dem Planheitsfehler verzögerungsfrei ausgesteuert werden können. Der herkömmliche Regelkreis bleibt aufrechterhalten, so dass nach wie vor Änderungen der Bandplanheit mit grossen Zeitverhalten durch den herkömmlichen Regelkreis kompensiert werden können. Die erfindungsgemässe Vorsteuerung ist, obgleich sie während des gesamten Walzprozesses einsetzbar ist, in erster Linie geeignet, Bandplanheitsänderungen in der Einfädelphase beim Anwalzen des Bandes und beim Bandauslauf hervorgerufenen durch Geschwindigkeitsveränderungen zu kompensieren.In contrast, the present invention provides to use the precontrol indicated at 9 in order to apply a correction value determined by rolling force change ΔFw to the known control system by means of predetermined characteristic curves created by simulation calculation, with which flatness errors can be controlled without delay. The conventional control loop remains intact, so that changes in the strip flatness can still be compensated for by the conventional control loop with great timing. The feedforward control according to the invention, although it can be used during the entire rolling process, is primarily suitable for compensating for changes in strip flatness during the threading-in phase when the strip is rolled on and during strip run-out by changes in speed.
Claims (2)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19843430034 DE3430034A1 (en) | 1984-08-16 | 1984-08-16 | PLANNING REGULATION ON ROLLING MILLS |
| DE3430034 | 1984-08-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0173045A1 EP0173045A1 (en) | 1986-03-05 |
| EP0173045B1 true EP0173045B1 (en) | 1988-12-28 |
Family
ID=6243109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP85108724A Expired EP0173045B1 (en) | 1984-08-16 | 1985-07-12 | Flatness control in strip rolling stands |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4753093A (en) |
| EP (1) | EP0173045B1 (en) |
| DE (1) | DE3430034A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4091342C2 (en) * | 1989-07-31 | 1993-11-04 | Toshiba Kawasaki Kk | DEVICE FOR CONTROLLING THE POSITION OF A ROLLING PLATE |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3823202A1 (en) * | 1988-07-08 | 1990-01-11 | Betr Forsch Inst Angew Forsch | METHOD FOR COLD ROLLING SHEETS AND STRIPS |
| DE3840016A1 (en) * | 1988-11-26 | 1990-05-31 | Schloemann Siemag Ag | METHOD FOR LEVELING SHEETS, STRIPS, TABLES, PROFILES, CARRIERS ETC. |
| DD294883A5 (en) * | 1990-06-05 | 1991-10-17 | Freiberg Bergakademie | METHOD OF GENERATING SELF-TENSION BELT FOR ROLLING |
| US5502992A (en) * | 1991-06-28 | 1996-04-02 | Siemens Aktiengesellshaft | Regulation system in the manufacture of hot rolled strips by means of a multi-stand hot rolling mill |
| US5325692A (en) * | 1992-09-28 | 1994-07-05 | Sumitomo Light Metal Industries, Ltd. | Method of controlling transverse shape of rolled strip, based on tension distribution |
| DE19843899C1 (en) * | 1998-09-24 | 2000-05-04 | Bwg Bergwerk Walzwerk | Method and device for measuring flatness of strips |
| US20100318245A1 (en) * | 2005-03-03 | 2010-12-16 | Nabtesco Corporation | Flight control system |
| ES2467099T3 (en) | 2006-08-28 | 2014-06-11 | Air Products And Chemicals, Inc. | Apparatus and method to control the flow rate of a cryogenic liquid |
| CA2696611A1 (en) * | 2007-08-28 | 2009-03-12 | Air Products And Chemicals, Inc. | Apparatus and method for providing condensation-and frost-free surfaces on cryogenic components |
| MY155518A (en) | 2007-08-28 | 2015-10-30 | Air Prod & Chem | Apparatus and method for controlling the temperature of a cryogen |
| US20110083447A1 (en) * | 2007-08-28 | 2011-04-14 | Air Products And Chemicals, Inc. | Apparatus and method for monitoring and regulating cryogenic cooling |
| BRPI0815931A2 (en) * | 2007-08-28 | 2018-01-09 | Air Prod & Chem | method and apparatus for use in an industrial process |
| CA2697841A1 (en) * | 2007-08-28 | 2009-03-05 | Air Products And Chemicals, Inc. | Discharging cryogen onto work surfaces in a cold roll mill |
| CN102716917B (en) * | 2012-06-21 | 2015-03-04 | 中冶南方工程技术有限公司 | Method for manually adjusting and computing shape target curve of cold-rolled steel strip |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1199203A (en) * | 1966-11-30 | 1970-07-15 | Nippon Kokan Kk | Apparatus for Controlling the Shape of a Workpiece During Rolling |
| US3568637A (en) * | 1968-05-13 | 1971-03-09 | Westinghouse Electric Corp | Tandem mill force feed forward adaptive system |
| US3630055A (en) * | 1969-05-14 | 1971-12-28 | Gen Electric | Workpiece shape control |
| US3855830A (en) * | 1969-08-04 | 1974-12-24 | Hitachi Ltd | Method and apparatus for controlling plate thickness in a rolling mill |
| US3934438A (en) * | 1973-05-09 | 1976-01-27 | Nippon Kokan Kabushiki Kaisha | Method of long-edge shape control for tandem rolling mill |
| US4125004A (en) * | 1977-07-12 | 1978-11-14 | Amtel, Inc. | Rolling mill gauge control system |
| JPS55112111A (en) * | 1979-02-23 | 1980-08-29 | Hitachi Ltd | Controller for continuous rolling mill |
| US4244025A (en) * | 1979-03-20 | 1981-01-06 | Alshuk Thomas J | Rolling mill gauge control system |
| DE2927769C2 (en) * | 1979-07-10 | 1987-01-22 | SMS Schloemann-Siemag AG, 4000 Düsseldorf | Device for controlling the flatness of strip-shaped metal rolling stock in a cold rolling mill |
| JPS5611103A (en) * | 1979-07-10 | 1981-02-04 | Ishikawajima Harima Heavy Ind Co Ltd | Method and apparatus for controlling shape of rolled sheet |
| GB2100470A (en) * | 1981-04-25 | 1982-12-22 | British Aluminium Co Ltd | Working strip material |
| JPS586713A (en) * | 1981-07-06 | 1983-01-14 | Ishikawajima Harima Heavy Ind Co Ltd | Shape controller for rolling mill |
| DE3216317A1 (en) * | 1982-05-03 | 1983-11-03 | Ishikawajima-Harima Jukogyo K.K., Tokyo | Method and device for the variable control of the transverse rigidity of a rolling mill |
| DE3240602A1 (en) * | 1982-11-03 | 1984-06-14 | Betriebsforschungsinstitut VDEh - Institut für angewandte Forschung GmbH, 4000 Düsseldorf | METHOD FOR REGULATING THE TENSION DISTRIBUTION IN COLD ROLLING OF TAPES |
| DE3476742D1 (en) * | 1983-03-14 | 1989-03-23 | Schloemann Siemag Ag | Method of making hot rolled strip with a high quality section and flatness |
| US4513594A (en) * | 1983-08-22 | 1985-04-30 | Tippins Machinery Company, Inc. | Method and apparatus for combining automatic gauge control and strip profile control |
-
1984
- 1984-08-16 DE DE19843430034 patent/DE3430034A1/en active Granted
-
1985
- 1985-07-12 EP EP85108724A patent/EP0173045B1/en not_active Expired
- 1985-08-15 US US06/766,112 patent/US4753093A/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4091342C2 (en) * | 1989-07-31 | 1993-11-04 | Toshiba Kawasaki Kk | DEVICE FOR CONTROLLING THE POSITION OF A ROLLING PLATE |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3430034C2 (en) | 1988-03-10 |
| US4753093A (en) | 1988-06-28 |
| DE3430034A1 (en) | 1986-02-27 |
| EP0173045A1 (en) | 1986-03-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0173045B1 (en) | Flatness control in strip rolling stands | |
| DE3036997C2 (en) | ||
| DE3116278C2 (en) | ||
| EP0121148B1 (en) | Method of making hot rolled strip with a high quality section and flatness | |
| EP2252416B1 (en) | Regulation method for a cold-rolling train with complete mass flow regulation | |
| WO2009049964A1 (en) | Operating method for introducing a product to be rolled into a roll stand of a roll mill, control device, data carrier, and roll mill for rolling a strip-type product to be rolled | |
| EP1986795B2 (en) | Method for suppressing the influence of roll eccentricities | |
| DE102008011275A1 (en) | Operating procedure for a multi-stand rolling mill with strip thickness determination using the continuity equation | |
| EP1278606A1 (en) | Method and device for reeling up in the proper position a hot-rolled strip in a reeling installation | |
| DE3721746A1 (en) | Method and device for measuring the flatness of rolling strip in wide hot strip trains | |
| DE4136013C2 (en) | Method and device for controlling a rolling mill | |
| DE3314466A1 (en) | METHOD AND DEVICE FOR CONTROLLING AN INTERMEDIATE TENSION VOLTAGE IN A CONTINUOUS ROLLING MILL | |
| DE3303829C2 (en) | ||
| DE69913538T2 (en) | Method and device for flatness control | |
| EP1173295B1 (en) | Rolling process for a metal strip and corresponding rolling device | |
| DE2554246A1 (en) | METHOD AND DEVICE FOR REGULATING FLATNESS WHEN ROLLING STRIP MATERIAL | |
| WO2000016919A1 (en) | Combined regulating system for producing particular product characteristics in the rolling of austentic, mixed austentic and ferritic and ferritic steel qualities | |
| EP0875303A2 (en) | Method for operating a rolling mill for warm and cold rolling flat products | |
| EP0734795B1 (en) | Method for feedforward thickness control in rolling of foils | |
| DE2836595A1 (en) | METHOD FOR CONTROLLING THE THICKNESS OF A FLAT PRODUCT DURING ROLLING AND DEVICE FOR CARRYING OUT THE METHOD | |
| JPS5722812A (en) | Method for automatic control of plate thickness of multistand rolling mill | |
| DE3401894A1 (en) | Method for the production of rolled strip with high strip shape accuracy and flatness | |
| DE68903738T2 (en) | HOT ROLLS OF METAL STRIP. | |
| DE69604233T2 (en) | Process and plant for cold rolling with compensation for the runout of the rolls | |
| DE3637043A1 (en) | Method for the predetermined maintenance of narrow thickness tolerances during the rolling of rolling stock in hot-strip rolling trains |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE FR LU NL |
|
| 17P | Request for examination filed |
Effective date: 19860327 |
|
| 17Q | First examination report despatched |
Effective date: 19870803 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): BE FR LU NL |
|
| ET | Fr: translation filed | ||
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19890616 Year of fee payment: 5 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: LU Payment date: 19890622 Year of fee payment: 5 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 19890703 Year of fee payment: 5 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19890731 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19890731 Year of fee payment: 5 |
|
| PLBI | Opposition filed |
Free format text: ORIGINAL CODE: 0009260 |
|
| 26 | Opposition filed |
Opponent name: HOOGOVENS GROEP BV Effective date: 19890928 Opponent name: ASEA BROWN BOVERI AG Effective date: 19890926 Opponent name: SMS SCHLOEMANN-SIEMAG AG Effective date: 19890920 |
|
| NLR1 | Nl: opposition has been filed with the epo |
Opponent name: HOOGOVENS GROEP BV Opponent name: ASEA BROWN BOVERI AG Opponent name: SMS SCHLOEMANN-SIEMAG AG |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Effective date: 19900731 |
|
| RDAG | Patent revoked |
Free format text: ORIGINAL CODE: 0009271 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: PATENT REVOKED |
|
| 27W | Patent revoked |
Effective date: 19900830 |
|
| BERE | Be: lapsed |
Owner name: MANNESMANN A.G. Effective date: 19900731 |
|
| NLR2 | Nl: decision of opposition | ||
| PLAB | Opposition data, opponent's data or that of the opponent's representative modified |
Free format text: ORIGINAL CODE: 0009299OPPO |