EP0591291B1 - Regulation in the manufacture of hot rolled strips by means of a multi-stand hot rolling mill - Google Patents
Regulation in the manufacture of hot rolled strips by means of a multi-stand hot rolling mill Download PDFInfo
- Publication number
- EP0591291B1 EP0591291B1 EP92912619A EP92912619A EP0591291B1 EP 0591291 B1 EP0591291 B1 EP 0591291B1 EP 92912619 A EP92912619 A EP 92912619A EP 92912619 A EP92912619 A EP 92912619A EP 0591291 B1 EP0591291 B1 EP 0591291B1
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- European Patent Office
- Prior art keywords
- individual
- tolerance range
- control system
- roll
- control line
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- 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
- 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
Definitions
- the invention relates to a regulation according to the preamble features of patent claim 1.
- the aim is to achieve the required profile formation and flatness of the strips produced by using a small number of simple rolling stands without complex mechanical roller actuators. If roller actuators are unavoidable, these actuators should be simple and limited to just a few stands. Especially for hot strip mills, which are designed according to these criteria, there has been no real possibility to optimize the thickness profile. A stitch schedule based on empirical values is still common.
- a suitable distribution of the distribution of the rolling forces is first selected from a series of standardized distribution of the rolling forces based on the experience of the rolling mill operator and then checked as part of a model calculation as to whether limit values for the rolling forces and critical flatness indices, which are also specified by the experienced operator, are exceeded.
- modernization of old rolling mills should also be possible with the control according to the invention, without the rolling mills having to be converted or provided with a large number of complex measuring devices and adjusting elements on the rolling stands.
- the physical conditions of a rolling mill can advantageously be used for control and calculation purposes in order to optimize it , and not just to commit to a predetermined straight line.
- the optimization computer carries out a quick calculation of the load distribution options for a rolling and can do that Clarify the question of whether and with which load distribution the required profile can be reached at the target thickness or whether the target thickness or profile cannot be achieved for the given rolling mill. If necessary, if the calculation on the optimization computer shows that the target profile or target thickness cannot be reached, the boundary conditions have to be changed or additional actuators have to be provided and used for the roll stands. The influencing of the profile and the final thickness by roller actuators is known to the rolling mill operator.
- the rolls of the individual stands of a rolling mill, 1 the rolled strip, and 3 the measuring devices and sensors for the individual rolls 1 and their drives, as well as for other function modules, e.g. for the roll gap, etc.
- the regulators and stellators for the rollers are designated 3a.
- the measured values of the measuring devices and sensors 3 are given to a measured value adaptation 4, after which they reach the statistical measured value backup 5.
- the stitch schedule recalculation 6 and the are carried out with these values Adaptation of the algorithms used for the recalculation of the pass schedule in 7.
- the values from 7 are transferred to the pass schedule calculation in 9, which determines, among other things, the rolling force, the rolling moment, in particular the profile, but also the position.
- the pass schedule data includes the rolling strategy data summarized in Part 8, which results in particular from the type of material, the finished thickness and the target profile as well as other operator and computer data. From the pass schedule calculation 9, the setpoint values result, which are calculated in 10 and which are specified for the individual controllers and actuators for the individual operating point controllers.
- FIG. 1 The functional blocks shown in FIG. 1 are advantageously combined in one computer, but processing can also take place in separate computers or separate parts of a computer.
- Corresponding computers in which the computing processes for the individual controllers can also run are known from publications, brochures, manuals etc. by the applicant. Their programming and the parameterization of the individual controllers result from the operating manuals.
- 11 denotes a lower work roll
- 12 an upper work roll
- 13 the rolled strip.
- the schematic representation does not take into account the roll bending opposite to the strip shape shown due to the influence of the rolling force, but does reflect the generally spherical design (crowning) of the work rolls.
- the strip has an edge thickness D R and a medium thickness D M , the edge thickness, for example (C40), being measured at the strip edge used.
- the profile value for the invoice results from the relationship It is usually specified in um.
- the respective special profile training is based on the requirements of the downstream cold rolling mill or the requirements on the hot strip produced.
- 14 denotes the shape control straight line with the lower tolerance limit 15 and the upper tolerance limit 16.
- points 17 and 18 which are in the range of the critical thickness, below which the material flow in the width direction can only take place to a very limited extent, the slope changes the limit curves 15 and 16.
- the profile funnel resulting from the limit curves 15 and 16 has the symmetrical tolerance limit angle ⁇ in the area below the critical thickness and the tolerance limit angle ⁇ above and above the critical thickness ⁇ 2nd downward. This simplification is particularly cheap from a computational point of view and is sufficiently precise.
- the shape control straight line 14 extends through the zero point in its extension.
- the operating points can be moved within the tolerance limit curves 15 and 16.
- the target profile and final thickness define the shape control straight line 14.
- the rolling force is the main influencing factor on the pass reduction, the other rolling influencing factors, on the other hand, decrease and only represent auxiliary variables. A redistribution of the rolling force thus represents the essential control element for the profile and the thickness achieved. the required total acceptance.
- the strip profile achieved has a direct effect on the strip flatness during further processing, so that this too is determined by strip thickness and strip profile with only a few possibilities of influence.
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Abstract
Description
Die Erfindung betrifft eine Regelung gemäß den Oberbegriffsmerkmalen des Patentanspruchs 1.The invention relates to a regulation according to the preamble features of patent claim 1.
Eine derartige Regelung ist aus der DE-B-2 106 848 bekannt.Such a regulation is known from DE-B-2 106 848.
Bei Warmbandwalzwerken ist es das Bestreben, die geforderte Profilausbildung und Planheit der erzeugten Bänder durch eine kleine Zahl einfacher Walzgerüste ohne aufwendige mechanische Walzen-Stellglieder zu erreichen. Falls Walzen-Stellglieder unvermeidbar sind, sollen diese Stellglieder einfach und nur auf wenige Gerüste beschrankt sein. Insbesondere für Warmbreitbandstraßen, die nach diesen Kriterien ausgelegt sind, gab es bisher keine echte Möglichkeit, das Dickenprofil zu optimieren. Eine Stichplangestaltung anhand von Erfahrungswerten ist nach wie vor üblich. So wird bei der aus der DE-B-2 106 848 bekannten Regelung basierend auf der Erfahrung des Walzstraßenbedieners zunächst aus einer Serie von standardisiert vorgegebenen Verteilungen der Walzkräfte eine geeignete Walzkraftverteilung ausgewählt und anschließend im Rahmen einer Modellrechnung daraufhin überprüft, ob Grenzwerte für die Walzkräfte und kritische Ebenheitsindices, die ebenfalls von dem erfahrenen Bediener vorgegeben werden, überschritten werden.In hot strip rolling mills, the aim is to achieve the required profile formation and flatness of the strips produced by using a small number of simple rolling stands without complex mechanical roller actuators. If roller actuators are unavoidable, these actuators should be simple and limited to just a few stands. Especially for hot strip mills, which are designed according to these criteria, there has been no real possibility to optimize the thickness profile. A stitch schedule based on empirical values is still common. In the control known from DE-B-2 106 848, a suitable distribution of the distribution of the rolling forces is first selected from a series of standardized distribution of the rolling forces based on the experience of the rolling mill operator and then checked as part of a model calculation as to whether limit values for the rolling forces and critical flatness indices, which are also specified by the experienced operator, are exceeded.
Aus der EP-A-0 121 148 ist eine Profil- und Planheitsregelung für Warmband-Tandemstraßen bekannt, bei der das Bandprofil bei der kritischen Dicke, unterhalb derer keine wesentliche Umformung des Walzbandes in Richtung der Breite mehr erzielbar ist, als Grundlage einer aufwendigen Planheits- und Profilausbildungsregelung des Warmbandes verwendet. wird. Eine gleichwirkende Regelung offenbart auch die DE-A-27 36 234. Walzstraßen mit den vorgenannten Regelungen benötigen eine Vielzahl von Dicken, Profil- und Planheitsmeßgeräten im Verlauf der Walzstraße sowie aufwendige Gerüstregelungen. Die Gesamtkosten einer derartig geregelten Warmband-, insbesondere Breitbandstraße, sind hoch. Sowohl die Meßgeräte als auch die Walzenstellglieder sind wartungsaufwendig und erhöhen den Betriebsaufwand beträchtlich.From EP-A-0 121 148 a profile and flatness control for hot strip tandem lines is known, in which the strip profile at the critical thickness below which no substantial deformation of the rolled strip in the width direction can be achieved is used as the basis of a complex flatness and profile training regulation of the hot strip. becomes. DE-A-27 36 234 also discloses a regulation with the same effect. Rolling mills with the aforementioned regulations require a large number of thicknesses, profile and flatness measuring devices in the course of the rolling mill, and complex stand regulations. The total cost of such a hot strip, in particular broadband line, is high. Both the measuring devices and the roller actuators are maintenance-intensive and increase the operating expenditure considerably.
Es ist Aufgabe der Erfindung, eine Regelung für das Herstellen von Warmband mittels eines mehrgerüstigen Warmbandwalzwerks, insbesondere eines Breitbandwalzwerks, anzugeben, die durch Modellberechnungen, insbesondere durch selbstadaptionsfähige Modellberechnungen, mit einem Minimum an Aufwand zu toleranzgerechten Walzbändern führt. Insbesondere soll auch eine Modernisierung alter Walzstraßen mit der erfindungsgemäßen Regelung möglich sein, ohne daß hierzu die Walzstraßen umgebaut oder mit einer Vielzahl von aufwendigen Meßgeräten und Stellelementen an den Walzgerüsten versehen werden müssen.It is an object of the invention to provide a regulation for the production of hot strip by means of a multi-stand hot strip rolling mill, in particular a broadband rolling mill, which leads to tolerances-compliant rolled strips by means of model calculations, in particular by self-adaptable model calculations. In particular, modernization of old rolling mills should also be possible with the control according to the invention, without the rolling mills having to be converted or provided with a large number of complex measuring devices and adjusting elements on the rolling stands.
Die Lösung der Aufgabe gelingt durch eine Regelung mit den Merkmalen des Patentanspruchs 1. Unter Benutzung einer, dem Walzwerker aus langjähriger Erfahrung prinzipiell vertrauten Rechentechnik, ist es so, vorteilhaft walzwerkstechnisch einfach, möglich, die geforderten Profil- und Planheitswerte weitestgehend nur durch Einflußnahme auf die Haupteinflußgröße des Walzprozesses, die Aufteilung der erforderlichen Summenwalzkraft auf die Einzelgerüste, zu erreichen. Überraschenderweise ist die passende Lastverteilung durch die Benutzung einer Formsteuerungsgeraden für das erforderliche Adaptionsmodell erreichbar. Zusammen mit weiteren Maßnahmen, die mit der primären Maßnahme der Regelung durch passende Lastverteilung zusammenwirken, wird das geforderte Profil für Bänder mit unterschiedlichen Walztemperaturen, Profilausbildungen, Enddicken etc. erreicht. So kann die erfindungsgemäße Regel- und Rechentechnik den "Hardware"-Aufwand in der Walztechnik bei gleichzeitig höherer Flexibilität nicht unerheblich senken.The problem is solved by a regulation with the features of claim 1. Using a computer technology that is fundamentally familiar to the rolling miller from many years of experience, it is thus possible, advantageously in terms of rolling mill technology, to largely achieve the required profile and flatness values only by influencing the Main influencing factor of the rolling process, the distribution of the required total rolling force to achieve the individual stands. Surprisingly, the appropriate load distribution is through the use of a shape control line for the required adaptation model available. Together with other measures, which interact with the primary measure of regulation by appropriate load distribution, the required profile for strips with different rolling temperatures, profile designs, final thicknesses etc. is achieved. Thus, the control and computing technology according to the invention can significantly reduce the "hardware" expenditure in rolling technology while at the same time increasing flexibility.
Da der überraschenderweise vorhandene, ausnutzungsfähige Toleranzbereich der Formsteuerungsgeraden unterhalb der kritischen Dicke, unter der sich eine relative Profilkonstanz ergibt, klein und oberhalb der kritischen Dicke größer ist, kann vorteilhaft von den physikalischen Gegebenheiten einer Walzstraße regel- und rechentechnisch Gebrauch gemacht werden, um eine Optimierung, und nicht nur eine Festlegung auf eine vorherbestimmte Gerade, zu erreichen.Since the surprisingly available, exploitable tolerance range of the shape control straight line is small below the critical thickness, below which a relative profile constancy results, and larger above the critical thickness, the physical conditions of a rolling mill can advantageously be used for control and calculation purposes in order to optimize it , and not just to commit to a predetermined straight line.
Bei den in den Ansprüchen 2, 3 und 4 angegebenen Ausgestaltungen der Erfindung erhält man vorteilhaft einfach einen den physikalischen Gegebenheiten im Walzwerk angepaßten Optimierungsbereich für die Lastverteilungsberechnung in dem die Formsteuerungsgerade verschwenkt oder auf andere Weise geändert werden kann. Innerhalb des Toleranzbereichs führt der Optimierungsrechner eine schnelle Berechnung der Lastverteilungsmöglichkeiten für eine Walzung durch und kann die Frage klären, ob und bei welcher Lastverteilung das geforderte Profil bei Solldicke erreichbar ist oder ob Solldicke oder Profil für die gegebene Walzstraße so nicht erreichbar sind. Gegebenenfalls müssen, wenn die Berechnung auf dem Optimierungsrechner zeigt, daß Sollprofil oder Solldicke nicht erreichbar sind, die Randbedingungen geändert werden oder zusätzliche Stellglieder für die Walzgerüste vorgesehen und eingesetzt werden. Die Beeinflussung des Profils und der Enddicke durch Walzen-Stellglieder sind dem Walzwerker bekannt.In the embodiments of the invention specified in
Wenn sich bei der Berechnung Betriebspunkte außerhalb des Profiltrichters ergeben, erfolgt eine Neuberechnung mit neuen Lastverteilungsannahmen, bis alle Betriebspunkte im Toleranzbereich liegen. Wenn die Optimierungsrechnung ergibt, daß zusätzlich zur Änderung der Lastverteilung auf die Einzelgerüste zur Einhaltung des Toleranzbereichs der Formsteuerungsgeraden zusätzliche Einflüsse auf den Walzprozeß wirken müssen, erfolgt dies vorteilhaft durch Beeinflussung der Walzenrückbiegung, der Walzenverschiebung und/oder -schränkung und/oder durch eine Beeinflussung der thermischen Balligkeit, etwa durch Kühlung oder auch durch hydraulische oder thermische Beeinflussung. Auch eine Walzenschliffänderung kann sich als Folge der Optimierungsrechnung im Zusammenhang mit dem Toleranzbereich ergeben. Dabei ist es vorteilhaft, die Walzenverschleißeinflüsse laufend auszugleichen.If there are operating points outside the profile funnel during the calculation, a new calculation is made with new load distribution assumptions until all operating points are within the tolerance range. If the optimization calculation shows that in addition to changing the load distribution on the individual stands in order to maintain the tolerance range of the shape control straight lines, additional influences must have an effect on the rolling process, this is advantageously done by influencing the roll bending, the roll displacement and / or restriction and / or by influencing the thermal crowning, for example by cooling or by hydraulic or thermal influencing. A roller grinding change can also result as a result of the optimization calculation in connection with the tolerance range. It is advantageous to constantly compensate for the effects of roller wear.
Weitere Vorteile und Einzelheiten ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispieles, anhand der Zeichnung und in Verbindung mit den Unteransprüchen. Im einzelnen zeigen:
- FIG 1
- eine schematisiert dargestellte Walzstraße mit Angabe der Regelungsstruktur und der wichtigsten Einzelgrößen,
- FIG 2
- die schematisiert dargestellten Arbeitswalzen eines Walzgerüsts und
- FIG 3
- eine Darstellung der Formsteuerungsgeraden und ihres Toleranzbereichs.
- FIG. 1
- a schematically represented rolling mill with details of the control structure and the most important individual variables,
- FIG 2
- the schematically represented work rolls of a roll stand and
- FIG 3
- a representation of the shape control line and its tolerance range.
In FIG 1 sind mit 1 die Walzen der einzelnen Gerüste einer Walzstraße, mit 2 das gewalzte Band und mit 3 die Meßgeräte und Sensoren für die einzelnen Walzen 1 und ihre Antriebe sowie für andere Funktionsbausteine, z.B. für den Walzspalt etc., bezeichnet. Die Regler und Stellatoren für die Walzen sind mit 3a bezeichnet.In FIG. 1, the rolls of the individual stands of a rolling mill, 1 the rolled strip, and 3 the measuring devices and sensors for the individual rolls 1 and their drives, as well as for other function modules, e.g. for the roll gap, etc. The regulators and stellators for the rollers are designated 3a.
Die Meßwerte der Meßgeräte und Sensoren 3 werden einer Meßwertanpassung 4 aufgegeben, wonach sie in die statistische Meßwertsicherung 5 Gelangen. Mit diesen Werten erfolgt die Stichplannachberechnung 6 sowie die Adaption der für die Stichplannachberechnung verwendeten Algorithmen in 7. Die Werte aus 7 werden in 9 in die Stichplanberechnung übernommen, die unter anderem die Walzkraft, das Walzmoment, insbesondere das Profil, aber auch die Anstellung festlegt. In die Stichplanberechnung gehen die in Teil 8 zusammengefaßten Daten der Walzstrategie ein, die sich insbesondere aus der Materialart, der Fertigdicke und dem Sollprofil sowie weiteren Bediener- und Rechnerdaten ergibt. Aus der Stichplanberechnung 9 ergeben sich die Sollwertvorgabewerte, die in 10 errechnet werden und den Einzelreolern und Stellatoren für die einzelnen Betriebspunktregler vorgegeben werden.The measured values of the measuring devices and sensors 3 are given to a measured value adaptation 4, after which they reach the statistical measured
Die in FIG 1 dargestellten Funktionsblöcke sind vorteilhaft in einem Rechner zusammengefaßt, es kann aber auch eine Verarbeitung in getrennten Rechnern oder getrennten Teilen eines Rechners erfolgen. Entsprechende Rechner, in denen auch die Rechenvorgänge für die Einzelregler ablaufen können, sind aus Veröffentlichungen, Prospekten, Handbüchern etc. des Anmelders bekannt. Ihre Programmierung sowie die Parametrierung der Einzelregler ergibt sich aus den Betriebshandbüchern.The functional blocks shown in FIG. 1 are advantageously combined in one computer, but processing can also take place in separate computers or separate parts of a computer. Corresponding computers in which the computing processes for the individual controllers can also run are known from publications, brochures, manuals etc. by the applicant. Their programming and the parameterization of the individual controllers result from the operating manuals.
In FIG 2 bezeichnet 11 eine untere Arbeitswalze, 12 eine obere Arbeitswalze und 13 das gewalzte Band. Die schematische Darstellung berücksichtigt nicht die der gezeigten Bandform entgegengesetzte Walzenbiegung durch den Einfluß der Walzkraft, gibt aber die prinzipiell ballige Ausführung (Bombierung) der Arbeitswalzen wieder. Das Band hat eine Randdicke DR und eine Mitteldicke DM, wobei die Randdicke z.B. (C₄₀) an der verwerteten Bandkante gemessen wird. Der Profilwert für die Rechnung ergibt sich nach der Beziehung
Er wird normalerweise in Um angegeben. Die jeweilige spezielle Profilausbildung richtet sich nach den Anforderungen der nachgeschalteten Kaltwalzstraße bzw. nach den Anforderungen an das erzeugte Warmband.In FIG. 2, 11 denotes a lower work roll, 12 an upper work roll and 13 the rolled strip. The schematic representation does not take into account the roll bending opposite to the strip shape shown due to the influence of the rolling force, but does reflect the generally spherical design (crowning) of the work rolls. The strip has an edge thickness D R and a medium thickness D M , the edge thickness, for example (C₄₀), being measured at the strip edge used. The profile value for the invoice results from the relationship
It is usually specified in um. The respective special profile training is based on the requirements of the downstream cold rolling mill or the requirements on the hot strip produced.
In FIG 3 bezeichnet 14 die Formsteuerungsgerade mit der unteren Toleranzgrenze 15 und der oberen Toleranzgrenze 16. In den Punkten 17 und 18, die im Bereich der kritischen Dicke liegen, unterhalb derer der Materialfluß in Breitenrichtung nur noch sehr begrenzt stattfinden kann, ändert sich die Steigung der Grenzkurven 15 und 16. Der sich aus den Grenzkurven 15 und 16 ergebende Profiltrichter hat im Bereich unter der kritischen Dicke den symmetrischen Toleranz- Grenzenwinkel β und oberhalb der kritischen Dicke den Toleranz-Grenzenwinkel α nach oben and 
Wie ersichtlich verläuft die Formsteuerungsgerade 14 in ihrer Verlängerung durch den Nullpunkt. Die Betriebspunkte können innerhalb der Toleranz-Grenzkurven 15 und 16 bewegt werden. Sollprofil und Enddicke legen die Formsteuerungsgerade 14 fest. Die Walzkraft ist die Haupteinflußgröße auf die Stichabnahme, die anderen walztechnischen Einflußgrößen treten demgegenüber zurück und stellen nur Hilfsgrößen dar. Eine Umverteilung der Walzkraft stellt also das wesentliche Stellglied für das erreichte Profil und die Dicke dar. Grundbedingung ist dabei die Einhaltung der Summenwalzkraft, d.h. der geforderten Gesamtabnahme.As can be seen, the shape control
Unterhalb der kritischen Dicke wirkt das erreichte Bandprofil direkt auf die Bandplanheit bei der Weiterverarbeitung, so daß auch diese durch Banddicke und Bandprofil mit nur geringen Einflußmöglichkeiten vorgegeben ist.Below the critical thickness, the strip profile achieved has a direct effect on the strip flatness during further processing, so that this too is determined by strip thickness and strip profile with only a few possibilities of influence.
Claims (8)
- Control system in the manufacture of hot strip by means of a multiple-stand hot-strip rolling mill, which has a higher-level process control system, with which there are specified a sampling plan with the initial and final dimensions, with material data and rolling temperatures, and a guidance system for the setpoint guidance of lower-level, decoupled individual controllers for the variable function factors of the individual roll stands, for example roll adjustment, rotational speed, torque, with a computational process using model equations with convergent parameter adjustment to the actual parameters being used to determine the setpoints of the individual controllers in such a way that a working-point control which can be determined in advance is obtained and section control and regulation take place by changing the load distribution on the individual stands,
characterized in that for the section control and regulation proceeding from a shape control line (14) which is fixed in the section thickness diagram by the zero point and the specified section and the end thickness of the hot strip (2, 13), the working points of the individual stands are determined in such a way that they lie in a predetermined tolerance range of the shape control line (14), whereby the tolerance range below the critical thickness, below which the material flow in the hot strip (2, 13) in the transverse direction can only take place to a limited extent, is small and above the critical thickness is larger. - Control system according to claim 1,
characterized in that the limits (15, 16) of the tolerance range below the critical thickness extend at a small deviation angle (β) and above the critical thickness at a larger deviation angle (α) to the shape control line (14). - Control system according to claim 2,
characterized in that the limits (15, 16) of the tolerance range below the critical thickness extend symmetrically, and above the critical thickness asymmetrically, to the shape control line (14). - Control system according to claim 3,
characterized in that above the critical thickness the ratio of the deviations of the limits (15, 16) from the shape control line (14) to the top and bottom amounts to 2:1. - Control system according to one of the preceding claims, characterized in that the specified section is calculated anew if working points result outside the tolerance range.
- Control system according to one of the preceding claims, characterized in that in addition to changing the load distribution on the individual stands to maintain the tolerance range of the shape control line (14), influence is exerted on the roll re-deflection.
- Control system according to one of the preceding claims, characterized in that in addition to changing the load distribution on the individual stands to maintain the tolerance range of the shape control line (14), influence is exerted on the roll displacement and/or roll transposition.
- Control system according to one of the preceding claims, characterized in that in addition to changing the load distribution on the individual stands to maintain the tolerance range of the shape control line (14), a change in the roll microsection and/or an influence on the thermal change in convexity takes place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP92912619A EP0591291B1 (en) | 1991-06-28 | 1992-06-16 | Regulation in the manufacture of hot rolled strips by means of a multi-stand hot rolling mill |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP91110753 | 1991-06-28 | ||
| EP91110753 | 1991-06-28 | ||
| EP92912619A EP0591291B1 (en) | 1991-06-28 | 1992-06-16 | Regulation in the manufacture of hot rolled strips by means of a multi-stand hot rolling mill |
| PCT/EP1992/001364 WO1993000181A1 (en) | 1991-06-28 | 1992-06-16 | Regulation system in the manufacture of hot rolled strips by means of a multi-stand hot rolling mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0591291A1 EP0591291A1 (en) | 1994-04-13 |
| EP0591291B1 true EP0591291B1 (en) | 1995-11-08 |
Family
ID=8206876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92912619A Expired - Lifetime EP0591291B1 (en) | 1991-06-28 | 1992-06-16 | Regulation in the manufacture of hot rolled strips by means of a multi-stand hot rolling mill |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5502992A (en) |
| EP (1) | EP0591291B1 (en) |
| JP (1) | JPH06508560A (en) |
| AT (1) | ATE129938T1 (en) |
| DE (1) | DE59204272D1 (en) |
| WO (1) | WO1993000181A1 (en) |
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| CN104588417A (en) * | 2015-01-21 | 2015-05-06 | 燕山大学 | Characteristic parameter identification method of lateral distribution of strip steel thickness on the basis of mechanism |
| DE102018212074A1 (en) | 2018-07-19 | 2020-01-23 | Sms Group Gmbh | Method for determining manipulated variables for active profile and flatness actuators for a roll stand and for profile and central flatness values for hot-rolled metal strip |
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| EP0671225B1 (en) * | 1994-03-10 | 1999-07-07 | Kawasaki Steel Corporation | Method for controlling rolling process in hot strip finish rolling mill |
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| DE19618712B4 (en) * | 1996-05-09 | 2005-07-07 | Siemens Ag | Control method for a roll stand for rolling a strip |
| DE19642918C2 (en) * | 1996-10-17 | 2003-04-24 | Siemens Ag | System for calculating the final thickness profile of a rolled strip |
| CN1103648C (en) * | 1997-05-23 | 2003-03-26 | 阿尔卡塔尔公司 | Device for operating multi-set of rolling mill |
| EP1030747B1 (en) * | 1997-11-10 | 2003-11-26 | Siemens Aktiengesellschaft | Method and assembly for hot-rolling thin strips of steel |
| JP3348826B2 (en) * | 1997-12-04 | 2002-11-20 | 川崎製鉄株式会社 | Setting method of rolling condition of hot rolled material |
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| US3552162A (en) * | 1968-04-22 | 1971-01-05 | Bethlehem Steel Corp | Rolling mill control system |
| US3592031A (en) * | 1968-12-09 | 1971-07-13 | English Electric Co Ltd | Automatic control of rolling mills |
| US3820711A (en) * | 1971-02-16 | 1974-06-28 | M Economopoulos | Process for the predetermination of the datum values of a wide strip finishing rolling mill train controlled by an electronic calculator |
| JPS5225824B2 (en) * | 1972-10-16 | 1977-07-09 | ||
| JPS5322851A (en) * | 1976-08-13 | 1978-03-02 | Ishikawajima Harima Heavy Ind | Rolled plate form controlling and device |
| EP0121148B1 (en) * | 1983-03-14 | 1989-02-15 | Sms Schloemann-Siemag Aktiengesellschaft | Method of making hot rolled strip with a high quality section and flatness |
| DE3430034A1 (en) * | 1984-08-16 | 1986-02-27 | Mannesmann AG, 4000 Düsseldorf | PLANNING REGULATION ON ROLLING MILLS |
-
1992
- 1992-06-16 WO PCT/EP1992/001364 patent/WO1993000181A1/en active IP Right Grant
- 1992-06-16 DE DE59204272T patent/DE59204272D1/en not_active Expired - Fee Related
- 1992-06-16 EP EP92912619A patent/EP0591291B1/en not_active Expired - Lifetime
- 1992-06-16 AT AT92912619T patent/ATE129938T1/en not_active IP Right Cessation
- 1992-06-16 US US08/170,230 patent/US5502992A/en not_active Expired - Lifetime
- 1992-06-16 JP JP5501308A patent/JPH06508560A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103611730A (en) * | 2013-11-19 | 2014-03-05 | 北京首钢自动化信息技术有限公司 | Method for improving precision of size control for continuous hot-rolled novel first coil |
| CN103611730B (en) * | 2013-11-19 | 2015-11-18 | 北京首钢自动化信息技术有限公司 | For improving the method for hot continuous rolling new varieties first coil size Control precision |
| CN104588417A (en) * | 2015-01-21 | 2015-05-06 | 燕山大学 | Characteristic parameter identification method of lateral distribution of strip steel thickness on the basis of mechanism |
| DE102018212074A1 (en) | 2018-07-19 | 2020-01-23 | Sms Group Gmbh | Method for determining manipulated variables for active profile and flatness actuators for a roll stand and for profile and central flatness values for hot-rolled metal strip |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06508560A (en) | 1994-09-29 |
| ATE129938T1 (en) | 1995-11-15 |
| US5502992A (en) | 1996-04-02 |
| DE59204272D1 (en) | 1995-12-14 |
| WO1993000181A1 (en) | 1993-01-07 |
| EP0591291A1 (en) | 1994-04-13 |
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