EP1112129B1 - Method of producing particular product characteristics in the rolling of austentic, mixed austentic and ferritic and ferritic steel qualities - Google Patents

Method of producing particular product characteristics in the rolling of austentic, mixed austentic and ferritic and ferritic steel qualities Download PDF

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Publication number
EP1112129B1
EP1112129B1 EP99969358A EP99969358A EP1112129B1 EP 1112129 B1 EP1112129 B1 EP 1112129B1 EP 99969358 A EP99969358 A EP 99969358A EP 99969358 A EP99969358 A EP 99969358A EP 1112129 B1 EP1112129 B1 EP 1112129B1
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Prior art keywords
roll
rolling
rollers
rolls
roller
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German (de)
French (fr)
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EP1112129A1 (en
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Wilfried Runde
Ulrich Skoda-Dopp
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SMS Siemag AG
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SMS Demag AG
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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
    • B21B37/58—Roll-force control; Roll-gap control
    • 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
    • B21B37/58—Roll-force control; Roll-gap control
    • B21B37/62—Roll-force control; Roll-gap control by control of a hydraulic adjusting device
    • 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
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/12—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll camber
    • 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
    • B21B1/46—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 metal immediately subsequent to continuous casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/02—Austenitic rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/04—Ferritic rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/16—Two-phase or mixed-phase rolling

Definitions

  • the invention relates to a method for generating defined product properties when rolling steel grades in austenitic, mixed austenitic-ferritic and ferritic range using a measuring method to determine the Roll gap of a pair of work rolls by detecting the absolute position of the Support or work rolls on the side facing away from the roll gap optical position measurement.
  • the gauge method has been used for thickness control for many years.
  • the strength of the rolling stock (c mat ) in the working area of the rolling stand has a linear characteristic, i.e. a larger or smaller rolling force, neglecting the temperature compensation at the working point, a measure of one Larger or smaller stitch reduction in the roll gap.
  • OGC process which is a more precise one Thickness control allowed.
  • OGC process the deflection of Position sensors measured that correlate directly with the nip opening, so that a value corresponding to the rolling stock thickness is obtained.
  • a four or Sexto scaffolding can be the springing up or change in position of the support roller, which is measured directly.
  • a corresponding measuring method is in the DE 42 03 469 C2 described.
  • a further control loop is required to control the rolling temperatures.
  • the Controlling a certain rolling temperature is an important prerequisite for the Preservation of a certain structure and thus for achieving the desired one mechanical properties of the rolling stock. For example, in a continuous Rolling mill for a given pass acceptance distribution by regulating the Rolling speed and the intermediate stand cooling to the final rolling temperature set the desired value. In a reversing line, certain Rolling temperatures etc. achieved by cooling phases between the rolling passes.
  • the gauge method is based on a linear one Rolling force characteristics. But it is known that with different steels below the austenite area a characteristic of the yield stress of the rolling stock is present, which has a non-linear profile in this temperature range (FIG. 4). In This means that the drop in rolling force does not always mean less Stitch reduction in the roll gap, i.e. the relationship between rolling force and There is no longer a clear change in thickness. Also with the so-called "Flying Gauge Change "(Fig.
  • the gauge method cannot be used because some of the Influencing factors determining the rolling process (e.g. roll speed, rolling force, Outlet thickness) change what is not exactly reproduced by the gauge method can be .
  • This also works when rolling in a thin strip casting and rolling line Gauge method only limited. Because due to the casting process can Thickness and temperature fluctuations occur in the rolling stock that affect the work area a conventional gauge control.
  • This rolling mill (see Fig. 1) consists of at least three in a row arranged horizontal frames 2 to 3 (quartos and / or sextos), each with hydraulic positions 4 are equipped.
  • the work rolls are on and provided on the outlet side with a device 5 with which the width and in the Intensity controllable by means of a cooling and / or heating medium without contact or the roller shape can be influenced by contact.
  • Inlet and under are Above the scraper 6 feed systems 7 arranged by the width controllably a lubricant is sprayed onto the roll or into the roll gap.
  • a lubricant is sprayed onto the roll or into the roll gap.
  • the last and possibly penultimate scaffold is with the So-called OGCC system 8 according to the invention.
  • OGCC system 8 There is one in front of each scaffold Temperature measuring point 10 arranged with which the rolling stock temperature across the width and / or is measured at points.
  • Behind the last scaffolding is a measuring station 11 installed, the temperature and thickness profile as well as width, flatness and Surface quality recorded.
  • the rolling stock 1 enters the first stand and leaves the road from the last stand 3.
  • the rolling temperature in the passes can be in austenitic, mixed austenitic-ferritic and / or ferritic range.
  • OCC Optical Gauge & Crown Control
  • On the top of the upper support roller 22 and / or on The bottom of the lower backup roller has several sensors along the length of the bale 24 arranged, which measure the actual profile shape in segments.
  • This Sensors are mounted on a carrier.
  • This carrier on Sliding shoes on the roller, the distance to the roller is constant. Consequently sensors that have a high resolution and a small measuring range, be used; e.g. Sensors that work according to the induction principle Measure the roller.

Abstract

The invention relates to a combined regulating system for producing defined product characteristics in the rolling of austentic, mixed austentic and ferritic and ferritic steel qualities, using a measuring method to determine the roll gap of a roll pair by detecting the absolute position of the work and back-up rolls on the side facing away from the roll gap by optical position measurement. The upper edge of the top roll or the lower edge of the bottom roll is detected relative to the absolute position of the rolls, in segments over the barrel length, by means of adjacent sensors situated along the roll. The measuring results are incorporated in a suitable regulating operation that influences the geometry of the roll gap and rolled stock using a model that takes into account the influences of the deflecting and roll adjusting systems, the deflection of the rolls, flattening between the rolls, flattening between the work roll and the rolled stock and the wear and thermal crowning of the rolls. In addition to the necessary absolute thickness, the regulating operation ensures that the necessary thickness profile and the flatness criteria are produced.

Description

Die Erfindung betrifft ein Verfahren zur Erzeugung definierter Produkteigenschaften beim Walzen von Stahlqualitäten im austenitischen, gemischt austenitisch-ferritischen und ferritischen Bereich unter Anwendung eines Messverfahrens zur Ermittlung des Walzspaltes eines Arbeitswalzenpaares durch Erfassen der absoluten Position der Stütz- oder Arbeitswalzen auf der jeweils dem Walzspalt abgewandten Seite mittels optischen Positionsmessung.The invention relates to a method for generating defined product properties when rolling steel grades in austenitic, mixed austenitic-ferritic and ferritic range using a measuring method to determine the Roll gap of a pair of work rolls by detecting the absolute position of the Support or work rolls on the side facing away from the roll gap optical position measurement.

Für die Dickenregelung wird seit vielen Jahren das Gaugemeter-Verfahren angewendet. Beim Gaugemeter-Verfahren (Fig. 3) wird angenommen, daß die Festigkeit des Walzgutes (cmat) im Arbeitsbereich des Walzgerüstes eine lineare Charakteristik hat, d.h. eine größere bzw. kleinere Walzkraft ist, vernachlässigt man die Temperaturkompensation im Arbeitspunkt, ein Maß für eine größere bzw. kleinere Stichabnahme im Walzspalt.The gauge method has been used for thickness control for many years. In the gauge method (Fig. 3) it is assumed that the strength of the rolling stock (c mat ) in the working area of the rolling stand has a linear characteristic, i.e. a larger or smaller rolling force, neglecting the temperature compensation at the working point, a measure of one Larger or smaller stitch reduction in the roll gap.

Eine Weiterentwicklung ist das so genannte OGC-Verfahren, das eine genauere Dickenregelung erlaubt. Bei diesem Verfahren wird die Auslenkung von Positionsgebern gemessen, die mit der Walzspaltöffnung direkt korrelieren, so daß man einen der Walzgutdicke entsprechenden Wert erhält. Bei einem Quarto- oder Sextogerüst kann dies die Auffederung bzw. Positionsänderung der Stützwalze sein, die direkt gemessen wird. Eine entsprechendes Meßverfahren ist in der DE 42 03 469 C2 beschrieben.A further development is the so-called OGC process, which is a more precise one Thickness control allowed. With this method the deflection of Position sensors measured that correlate directly with the nip opening, so that a value corresponding to the rolling stock thickness is obtained. With a four or Sexto scaffolding can be the springing up or change in position of the support roller, which is measured directly. A corresponding measuring method is in the DE 42 03 469 C2 described.

Unter Berücksichtigung der Walzendurchbiegungen, den Abplattungen zwischen den Walzen, der Abplattung zwischen Walze und Walzgut sowie des Grundschliffes, des Verschleißes und der thermischen Balligkeit der Walzen kann mit diesem Syswtem eine genauere Dickenregelung erfolgen als bisher nach dem Gaugemeterprinzip. Eine Profil-, Planheits- und Konturregelung ist jedoch mit dem bekannten System nicht möglich, hierzu sind zahlreiche andere Systeme und Verfahren bekannt, wie z.B.:

  • Arbeitswalzen mit einem bestimmten Grundschliff (symmetrisch / asymmetrisch)
  • Verschieben der Arbeitswalzen in axialer Richtung
  • Biegen der Arbeitswalzen in vertikaler Richtung
  • Schleifen der Arbeitswalzen während des Walzprozesses
  • Arbeitswalzen mit bestimmter Winkelstellung zur Walzrichtung (crossing)
  • kontrollierte Arbeitswalzenkühlung
  • Stützwalzen mit bestimmtem Walzenprofil
Taking into account the roll deflections, the flattening between the rolls, the flattening between the roll and the rolling stock, as well as the basic grinding, the wear and the thermal crowning of the rolls, this system can be used to regulate the thickness more precisely than previously according to the gauge principle. Profile, flatness and contour control is not possible with the known system, however, numerous other systems and methods are known, such as:
  • Work rolls with a certain basic grinding (symmetrical / asymmetrical)
  • Moving the work rolls in the axial direction
  • Bending the work rolls in the vertical direction
  • Grinding the work rolls during the rolling process
  • Work rolls with a certain angle to the rolling direction (crossing)
  • controlled work roll cooling
  • Back-up rolls with a specific roll profile

Für die Regelung der Walztemperaturen ist ein weiterer Regelkreis erforderlich. Das Ansteuern einer bestimmten Walztemperatur ist eine wichtige Voraussetzung für den Erhalt eines bestimmten Gefüges und somit für das Erreichen gewünschter mechanischer Eigenschaften des Walzgutes. So wird z.B. in einer kontinuierlichen Walzstraße bei gegebener Stichabnahmeverteilung mittels Regelung der Walzgeschwindigkeit sowie der Zwischengerüstkühlung die Endwalztemperatur auf den gewünschten Wert eingestellt. In einer Reversierstraße werden bestimmte Walztemperaturen u.a. durch Kühlungsphasen zwischen den Walzstichen erreicht.A further control loop is required to control the rolling temperatures. The Controlling a certain rolling temperature is an important prerequisite for the Preservation of a certain structure and thus for achieving the desired one mechanical properties of the rolling stock. For example, in a continuous Rolling mill for a given pass acceptance distribution by regulating the Rolling speed and the intermediate stand cooling to the final rolling temperature set the desired value. In a reversing line, certain Rolling temperatures etc. achieved by cooling phases between the rolling passes.

Bisher sind Dicken-, Temperatur- und Profil-, Planheits- sowie Konturreglung getrennte Regelkreise. Nachteiligerweise beeinflussen sich diese einzelnen Regelkreise gegenseitig und -je nach Vorgabe der Prioritäten- werden bestimmte Zielgrößen nicht optimal erreicht.So far, thickness, temperature and profile, flatness and contour control separate control loops. These individual factors disadvantageously influence one another Control circuits mutually and - depending on the given priorities - are determined Target sizes not optimally achieved.

Gerade beim Walzen einiger Stahlqualitäten im Temperaturbereich unterhalb des Austenitgebietes ergeben sich z.B. für die Dickenreglung große Probleme; denn, wie schon oben erwähnt, baut das Gaugemeter-Verfahren auf einer linearen Walzkraftcharakteristik auf. Es ist aber bekannt, daß bei verschiedenen Stählen unterhalb des Austenitgebietes eine Charakteristik der Fließspannung des Walzgutes vorliegt, die in diesem Temperaturbereich einen nichtlinearen Verlauf hat (Fig. 4). In diesem Bereich bedeutet Walzkraftabfall deshalb nicht immer eine geringere Stichabnahme im Walzspalt, d.h. der Zusammenhang zwischen Walzkraft- und Dickenänderung ist nicht mehr eindeutig gegeben. Auch beim sog. "Flying Gauge Change" (Fig. 5), wo sich die Auslaufdicke innerhalb einer möglichst kurzen Zeit ändert, kann das Gaugemeter-Verfahren nicht angewendet werden, da sich einige den Walzprozeß bestimmende Einflußgrößen (z.B. Walzengeschwindigkeit, Walzkraft, Auslaufdicke) ändern, was durch das Gaugemeterverfahren nicht genau nachgebildet werden kann . Auch beim Walzen in einer Dünnband-Giesswalzanlage funktioniert das Gaugemeter-Verfahren nur bedingt. Denn aufgrund des Giessprozesses können Dicken- und Temperaturschwankungen im Walzgut auftreten, die den Arbeitsbereich einer herkömmlichen Gaugemeter-Regelung überschreiten.Especially when rolling some steel grades in the temperature range below the Austenite area e.g. big problems for the thickness control; because how As already mentioned above, the gauge method is based on a linear one Rolling force characteristics. But it is known that with different steels below the austenite area a characteristic of the yield stress of the rolling stock is present, which has a non-linear profile in this temperature range (FIG. 4). In This means that the drop in rolling force does not always mean less Stitch reduction in the roll gap, i.e. the relationship between rolling force and There is no longer a clear change in thickness. Also with the so-called "Flying Gauge Change "(Fig. 5), where the spout thickness is within the shortest possible time changes, the gauge method cannot be used because some of the Influencing factors determining the rolling process (e.g. roll speed, rolling force, Outlet thickness) change what is not exactly reproduced by the gauge method can be . This also works when rolling in a thin strip casting and rolling line Gauge method only limited. Because due to the casting process can Thickness and temperature fluctuations occur in the rolling stock that affect the work area a conventional gauge control.

Hier kann man zwar das im Patent DE 4203469 C2 vorgestellte Verfahren benutzen, doch werden dort nur die Walzenballenenden zur Messung herangezogen , was aber kein genaues Maß für die Walzenform liefert, da die Walzenform über die Ballenlängeneben anderen o.g. Systemen- mittels einer steuerbaren Walzenkühlung sowie einer steuerbaren Walzspaltschmierung beeinflußt wird.
Aufgabe der vorliegenden Erfindung ist es, beim Walzen von Stahlqualitäten in unterschiedlichen Temperaturbereichen auf einer Reversierwalzstrasse mit mindestens einem bzw. einer Kontiwalzstrasse mit mindestens zwei Horizontal-Gerüsten, ein kombiniertes Regelungssystem und -verfahren anzuwenden, mit dem automatisch bestimmte Produkteigenschaften bzgl. geometrischer und mechanischer Eigenschaften erreicht werden.
Zur Lösung der Aufgabe wird -ausgehend von dem als OGC bekannten Stand der Technik- ein Verfahren vorgeschlagen, das relativ zur gemessenen absoluten Position der Walzen mittels längs der Walze nebeneinander angeordneter Sensoren die Oberkante der oberen bzw. Unterkante der unteren Walze jeweils über die Ballenlänge segmentweise erfaßt, dass die Meßergebnisse über ein Modell, das neben den Einflüssen der Biege- und Walzenstellsysteme, die Durchbiegungen der Walzen, die Abplattungen zwischen den Walzen, die Abplattung zwischen Arbeitswalze und Walzgut sowie den Verschleiß und die thermische Balligkeit der Walzen berücksichtigt, in eine die Walzspalt- und die Walzgutgeometrie beeinflussende geeignete Regelungen eingreifen, die neben der geforderten Absolutdicke das geforderte Dickenprofil und die Planheitskriterien herbeiführt. Here you can use the method presented in patent DE 4203469 C2, but only the roller bale ends are used for measurement there, but this does not provide an exact measure for the roller shape, since the roller shape over the bale lengths alongside the other systems mentioned above - by means of a controllable roller cooling and one controllable roll gap lubrication is affected.
It is an object of the present invention to use a combined control system and method for the automatic rolling of steel qualities in different temperature ranges on a reversing rolling train with at least one or a continuous rolling train with at least two horizontal stands, with which automatically determined product properties with regard to geometric and mechanical properties can be achieved.
To solve the problem, starting from the prior art known as OGC, a method is proposed which, relative to the measured absolute position of the rolls, by means of sensors arranged alongside the roll, the upper edge of the upper and lower edge of the lower roll in segments over the bale length recorded that the measurement results of a model that takes into account the influences of the bending and roll setting systems, the deflection of the rolls, the flattening between the rolls, the flattening between the work roll and the rolling stock, and the wear and thermal crowning of the rolls, into one Intervene in suitable regulations that influence the roll gap and the rolling stock geometry, which, in addition to the required absolute thickness, also brings about the required thickness profile and the flatness criteria.

Ausgestaltungen des erfindungsgemäßen Verfahrens sind in den Unteransprüchen definiert.
Die Erfindung wird nachfolgend anhand des Beispiels einer Kontiwalzstraße beschrieben. Es zeigt:

Fig. 1
die schematische Ansicht einer Walzstraße mit drei Gerüsten,
Fig. 2
die schematische Ansicht eines Walzensatzes
Fig. 3
ein bekanntes Gaugemeter-Diagramm,
Fig.4
die Fließspannungskurve eines ULC-Stahles und
Fig.5
die graphische Darstellung des Flying Gauge Change
Embodiments of the method according to the invention are defined in the subclaims.
The invention is described below using the example of a continuous rolling mill. It shows:
Fig. 1
the schematic view of a rolling mill with three stands,
Fig. 2
the schematic view of a roller set
Fig. 3
a known gauge diagram,
Figure 4
the yield stress curve of a ULC steel and
Figure 5
the graphical representation of the Flying Gauge Change

Diese Walzstraße (siehe Fig. 1) besteht aus mindestens drei hintereinander angeordneten Horizontal-Gerüsten 2 bis 3 (Quartos oder/und Sextos), die jeweils mit hydraulischen Anstellungen 4 ausgerüstet sind. Die Arbeitswalzen sind ein- und auslaufseitig mit einer Einrichtung 5 versehen, mit der über die Breite und in der Intensität steuerbar mittels eines Kühl- und/oder Heizmediums berührungsfrei oder kontaktbehaftet die Walzenform beeinflußt werden kann. Einlaufseitig sind unter- bzw. oberhalb der Abstreifer 6 Zufuhrsysteme 7 angeordnet, durch die über die Breite steuerbar ein Schmiermittel auf die Walze bzw. in den Walzspalt gespritzt wird. Vor und hinter der Walzstraße und zwischen den Gerüsten können Einrichtungen 9 vorhanden sein, mit denen über die Breite und in der Intensität steuerbar mittels eines Kühlund/oder Heizmediums berührungsfrei oder kontaktbehaftet die Walzguttemperatur beeinflußt werden kann. Das letzte und evtl. auch vorletzte Gerüst ist mit dem erfindungsgemäßen sog. OGCC-System 8 ausgestattet. Vor jedem Gerüst ist eine Temperaturmeßstelle 10 angeordnet, mit der die Walzguttemperatur über die Breite und/oder punktuell gemessen wird. Hinter dem letzten Gerüst ist eine Meßstation 11 installiert, die sowohl das Temperatur- und Dickenprofil als auch Breite, Planheit und Oberflachengüte erfaßt. This rolling mill (see Fig. 1) consists of at least three in a row arranged horizontal frames 2 to 3 (quartos and / or sextos), each with hydraulic positions 4 are equipped. The work rolls are on and provided on the outlet side with a device 5 with which the width and in the Intensity controllable by means of a cooling and / or heating medium without contact or the roller shape can be influenced by contact. Inlet and under are Above the scraper 6 feed systems 7 arranged by the width controllably a lubricant is sprayed onto the roll or into the roll gap. Before and Facilities 9 can be present behind the rolling mill and between the stands be controlled with the width and intensity by means of a cooling and / or Heating medium without contact or contact with the rolling stock temperature can be influenced. The last and possibly penultimate scaffold is with the So-called OGCC system 8 according to the invention. There is one in front of each scaffold Temperature measuring point 10 arranged with which the rolling stock temperature across the width and / or is measured at points. Behind the last scaffolding is a measuring station 11 installed, the temperature and thickness profile as well as width, flatness and Surface quality recorded.

Das Walzgut 1 tritt ins erste Gerüst ein und verläßt die Straße aus dem letzten Gerüst 3. Die Walztemperatur in den Stichen kann im
austenitischen, gemischt austenitisch-ferritischen und/oder ferritischen Bereich liegen.The rolling stock 1 enters the first stand and leaves the road from the last stand 3. The rolling temperature in the passes can be in
austenitic, mixed austenitic-ferritic and / or ferritic range.

Neben der Geschwindigkeitsregelung können für einen gegebenen Stichplan mit definierten Abnahmen mittels der Walzenbeeinflussungssysteme 5, 7 sowie der Walzgutbeeinflussungssysteme 9 die jeweils geforderten Walzguttemperaturen eingestellt werden, die die geforderten mechanischen Eigenschaften zum Ziel haben Gleichzeitig kann auch mit den Systemen 5, 7 neben den mechanischen Einstellsystemen die Walzspaltform beeinflußt werden, was mit dem System 8 als Meßglied erfaßt wird, so daß geeignete Regelungen eingreifen können, die neben der geforderten Absolutdicke das geforderte Dickenprofil und Planheitskriterium zum Ziel haben.In addition to the speed control for a given pass schedule with defined decreases using the roll control systems 5, 7 and Rolling stock control systems 9 the respectively required rolling stock temperatures can be set that have the required mechanical properties as the target At the same time, systems 5, 7 can also be used in addition to mechanical ones Adjustment systems are affected by the nip shape, what with the system 8 as Measuring element is detected so that suitable regulations can intervene, which in addition to the required absolute thickness, the required thickness profile and flatness criterion for the goal to have.

Wesentliches Meßsystem ist das in Fig. 2 dargestellte Regelsystem (OGCC = Optical Gauge & Crown Control). Auf der Oberseite der oberen Stützwalze 22 und/oder auf der Unterseite der unteren Stützwalze sind über der Ballenlänge mehrere Sensoren 24 angeordnet, die die tatsächliche Profilform segmentweise messen. Diese Sensoren sind auf einem Träger montiert. Dadurch, daß dieser Träger auf Gleitschuhen auf der Walze schleift, ist der Abstand zur Walze konstant. Somit konnen Sensoren, die eine hohe Auflösung und einen geringen Meßbereich haben, eingesetzt werden; z.B. Sensoren, die nach dem Induktionsprinzip den Abstand zu Walze messen. Gleichzeitig ist auf diesen Gleitschuhen eine definierte Meßkante 23 angebracht, die der optischen Positionsmessung dient. D.h. mittels der optischen Positionsmessung (Meßkante 23) wird die absolute Position der Stützwalzen erfaßt und relativ dazu mit den Sensoren (24) die Oberkante bzw. Unterkante der Stützwalzen über die Ballenlänge.The essential measuring system is the control system shown in FIG. 2 (OGCC = Optical Gauge & Crown Control). On the top of the upper support roller 22 and / or on The bottom of the lower backup roller has several sensors along the length of the bale 24 arranged, which measure the actual profile shape in segments. This Sensors are mounted on a carrier. The fact that this carrier on Sliding shoes on the roller, the distance to the roller is constant. Consequently sensors that have a high resolution and a small measuring range, be used; e.g. Sensors that work according to the induction principle Measure the roller. At the same time there is a defined measuring edge 23 on these sliding shoes attached, which is used for optical position measurement. That by means of the optical Position measurement (measuring edge 23), the absolute position of the support rollers is detected and relative to it with the sensors (24) the upper or lower edge of the Back-up rolls over the length of the bale.

Diese Meßergebnisse werden über ein Modell, das neben den Einflüssen der Biegeund Walzenstellsysteme die Durchbiegungen der Walzen 21, 22, die Abplattungen zwischen den Walzen 21, 22, die Abplattung zwischen Arbeitswalze 21 und Walzgut 25 sowie den Verschleiß und die thermische Balligkeit der Walzen 21, 22 berücksichtigt, in ein die Walzspalt- und die Walzgutgeometrie beschreibende Form übertragen. D.h. die mit den Sensoren ermittelten Meßwerte geben ein Abbild des im Walzspalt befindlichen Walzgutes. Rechnergesteuert wird in eine die Walzspalt- und die Walzgutgeometrie beeinflussende geeignete Regelungen eingegriffen, die neben der geforderten Absolutdicke das geforderte Dickenprofil und die Planheitskriterien herbeiführt.These measurement results are based on a model that, in addition to the influences of the bending and Roller positioning systems, the deflections of the rollers 21, 22, the flattening between the rollers 21, 22, the flattening between the work roller 21 and the rolling stock 25 as well as the wear and the thermal crowning of the rollers 21, 22 taken into account in a form describing the roll gap and the rolling stock geometry transfer. That the measured values determined with the sensors give an image of the im Rolling stock located. The roll gap and suitable regulations influencing the rolling stock geometry intervened, which besides the required absolute thickness, the required thickness profile and the flatness criteria causes.

Claims (8)

  1. Method of producing specific product characteristics in the rolling of steel qualities in the austinitic, mixed austenitic and ferritic, and ferritic ranges, using a measuring process to determine the roll gap of a pair of rollers by recording, by means of an optical position measuring process, the absolute position of the working or support rollers on the side facing away from the roll gap,
    characterised in that,
    in relation to the measured absolute position of the rollers, the top edge of the top roller and the bottom edge of the bottom roller are each measured, by means of sensors positioned side by side along the roller, in segments over the barrel length; that the measuring results are incorporated - by means of a model which takes into account, in addition to the effects of the bending and rolling adjustment systems, the deflections of the rollers, the flattened areas between the rollers, the flattening between the working roller and the stock, and the wear and thermal roll crown of the rollers - into an appropriate control system which acts on the roll gap and the rolled stock geometry and which produces, in addition to the required absolute thickness, the required gauge profile and the flatness criteria.
  2. Method as in Claim 1,
    characterised in that,
    in order to provide appropriate control of the roll gap and rolled stock geometry, the roller geometry of the working rollers can be acted upon, in a controllable manner, at the entry and exit sides, over the width and in intensity, by means of a cooling and/or heating medium, with or without contact.
  3. Method as in Claim 1 and 2,
    characterised in that
    a lubricant is sprayed in a controllable manner on to the roller or into the roll gap, across the entire width, on the entry side below/above the strippers acting on the working rollers.
  4. Method as in Claim 2,
    characterised in that
    the action, with or without contact, on the temperature of the rolled stock takes place before and after the rolling line and between the rolling stands.
  5. Method as in Claims 1 to 4,
    characterised in that
    it is applied on at least one stand.
  6. Method as in Claims 1 to 5,
    characterised in that
    the temperature of the rolled stock is measured, across the width or at specific points, before each stand.
  7. Method as in Claims 1 to 6,
    characterised in that,
    after the final stand, both the temperature and the gauge profile, and the width, flatness and surface quality, are recorded.
  8. Method as in Claims 1 to 7
    characterised in that
    the input material used for the rolling process is cast strip.
EP99969358A 1998-09-17 1999-09-14 Method of producing particular product characteristics in the rolling of austentic, mixed austentic and ferritic and ferritic steel qualities Revoked EP1112129B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19844305A DE19844305A1 (en) 1998-09-17 1998-09-17 Combined control system for generating certain product properties when rolling steel grades in the austenitic, mixed austenitic-ferritic and ferritic range
DE19844305 1998-09-17
PCT/DE1999/002970 WO2000016919A1 (en) 1998-09-17 1999-09-14 Combined regulating system for producing particular product characteristics in the rolling of austentic, mixed austentic and ferritic and ferritic steel qualities

Publications (2)

Publication Number Publication Date
EP1112129A1 EP1112129A1 (en) 2001-07-04
EP1112129B1 true EP1112129B1 (en) 2002-08-28

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Application Number Title Priority Date Filing Date
EP99969358A Revoked EP1112129B1 (en) 1998-09-17 1999-09-14 Method of producing particular product characteristics in the rolling of austentic, mixed austentic and ferritic and ferritic steel qualities

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EP (1) EP1112129B1 (en)
KR (1) KR20010075183A (en)
CN (1) CN1323248A (en)
AT (1) ATE222819T1 (en)
AU (1) AU1150500A (en)
BR (1) BR9913854A (en)
CA (1) CA2344194A1 (en)
DE (2) DE19844305A1 (en)
ES (1) ES2178502T3 (en)
WO (1) WO2000016919A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10059321A1 (en) * 2000-11-29 2002-06-13 Sms Demag Ag Contour measuring device for measuring the contour of a roll arranged in a roll stand
DE10063773A1 (en) * 2000-12-21 2002-06-27 Sms Demag Ag Contour measuring device and method for measuring a contour
CN1311922C (en) * 2002-03-15 2007-04-25 西门子公司 Computer-aided method for determing desired values for controlling elements of profile and surface evenness
DE102012218353A1 (en) 2012-10-09 2014-04-10 Siemens Ag Width control of a strip-shaped rolling stock
CN103128099B (en) * 2013-02-25 2016-01-06 南通职业大学 A kind of hot rolling system and method
KR101399886B1 (en) * 2013-03-28 2014-05-27 현대제철 주식회사 Apparatus for controlling camber of rolled steel plate and the method thereof
JP2016157313A (en) * 2015-02-25 2016-09-01 東芝三菱電機産業システム株式会社 Trend monitoring system of steel plant
JP6838083B2 (en) 2016-03-08 2021-03-03 ノベリス・インコーポレイテッドＮｏｖｅｌｉｓ Ｉｎｃ． Methods and equipment for controlling metal strip profiles during rolling using direct measurement of process parameters
CN110947788A (en) * 2019-11-29 2020-04-03 浙江摩多巴克斯科技股份有限公司 Welded pipe production line capable of realizing full-station high-precision automatic online detection
CN113102496A (en) * 2020-12-31 2021-07-13 鞍钢冷轧钢板（莆田）有限公司 Method for controlling middle reinforcement of cold-rolled strip steel

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1307823A (en) * 1969-09-03 1973-02-21 British Iron Steel Research Rolling of strip or plate material
US4274273A (en) * 1979-10-03 1981-06-23 General Electric Company Temperature control in hot strip mill
JPS5884606A (en) * 1981-11-12 1983-05-20 Kawasaki Steel Corp Predicting method for rolling load of steel plate
DE3419261C3 (en) * 1984-05-23 1994-12-15 Achenbach Buschhuetten Gmbh Roll cooling and / or lubricating device for cold strip rolling mills, especially fine strip rolling mills
JPS61219822A (en) * 1985-03-27 1986-09-30 Nippon Kokan Kk <Nkk> Rolling roll displacement correcting apparatus in measurement of rolling roll profile
DE19503363A1 (en) * 1994-02-15 1995-09-07 Siemens Ag Control of properties of cold-rolled strips
FR2726210B1 (en) * 1994-10-28 1997-01-10 Usinor Sacilor SHAPING THIN METAL PRODUCTS BETWEEN TWO CYLINDERS
DE19547438C2 (en) * 1995-12-11 2001-08-16 Sms Demag Ag Sensor carrier
DE19618712B4 (en) * 1996-05-09 2005-07-07 Siemens Ag Control method for a roll stand for rolling a strip
DE19618995C2 (en) * 1996-05-10 2002-01-10 Siemens Ag Method and device for influencing relevant quality parameters, in particular the profile or the flatness of a rolled strip

Also Published As

Publication number Publication date
AU1150500A (en) 2000-04-10
KR20010075183A (en) 2001-08-09
DE19844305A1 (en) 2000-03-30
CN1323248A (en) 2001-11-21
ATE222819T1 (en) 2002-09-15
BR9913854A (en) 2001-07-17
CA2344194A1 (en) 2000-03-30
DE59902485D1 (en) 2002-10-02
ES2178502T3 (en) 2002-12-16
WO2000016919A1 (en) 2000-03-30
EP1112129A1 (en) 2001-07-04

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