WO1995015233A1 - Continuous casting and rolling plant for steel strip, and a control system for such a plant - Google Patents

Continuous casting and rolling plant for steel strip, and a control system for such a plant Download PDF

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Publication number
WO1995015233A1
WO1995015233A1 PCT/DE1993/001228 DE9301228W WO9515233A1 WO 1995015233 A1 WO1995015233 A1 WO 1995015233A1 DE 9301228 W DE9301228 W DE 9301228W WO 9515233 A1 WO9515233 A1 WO 9515233A1
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WO
WIPO (PCT)
Prior art keywords
casting
rolling
control system
rolls
control
Prior art date
Application number
PCT/DE1993/001228
Other languages
German (de)
French (fr)
Inventor
Werner Kuttner
Friedemann Schmid
Hannes Schulze Horn
Georg Seefried
Kurt Hohendahl
Thomas Berger
Immo Domnig
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6888675&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1995015233(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to US08/647,949 priority Critical patent/US6044895A/en
Priority to EP94902613A priority patent/EP0732979B1/en
Priority to DE59308416T priority patent/DE59308416D1/en
Priority to SK681-96A priority patent/SK68196A3/en
Priority to JP7515321A priority patent/JPH09506296A/en
Priority to BR9307904A priority patent/BR9307904A/en
Priority to KR1019960702865A priority patent/KR960706382A/en
Priority to CA002177831A priority patent/CA2177831C/en
Publication of WO1995015233A1 publication Critical patent/WO1995015233A1/en
Priority to FI962295A priority patent/FI102737B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/20—Controlling or regulating processes or operations for removing cast stock
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • 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
    • B21B1/463—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 in a continuous process, i.e. the cast not being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
    • 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

Definitions

  • the invention relates to a casting and rolling system for steel strips and a control system therefor.
  • the object is achieved in that individual system parts are optimized with regard to their interaction to produce a strip suitable for further processing and are operated in coordination with one another.
  • the tuning is preferably optimized by a neurofuzzy system.
  • Slider closure drive with pouring jet control on the tundish or forehearth runs into a pre-cooling device, possibly also into an inlet mold, and there the pouring level, e.g. by radiometric measurement, for example with a measuring device from Dr. Berthold, set to an accuracy of ⁇ 3 mm.
  • This setting is independent of the cross section of the distribution and / or pre-cooling device. This can be open at the top or designed as a chamber.
  • a coolant control and, if necessary, a stirring device in the form of an electrical coil are provided for the distribution and precooling device. This can be made in one or more parts.
  • Pre-cooling device can be designed as an inlet mold, in particular for thicker cross sections, but it can also be designed as a distribution channel or as a box-like attachment with a cover.
  • the advantageously controllable training as described in DE 40 30 683 AI, is appropriate.
  • the pair of casting rolls advantageously has a coolant control as well as a power and position control and in particular a momentary shape calculation.
  • the shape of the casting rolls is aligned to the requirements of the downstream rolling devices in such a way that they deliver a tolerance-compliant strip with a minimum of adjustment.
  • a rectangular exit profile has been found to be particularly suitable, which advantageously has spherical edges, for example.
  • Behind the casting rolls there is advantageously an electromagnetic belt tension control and corresponding belt deflection devices, which at least partially replace the previously usual rolls, which can give rise to surface defects or promote the occurrence of edge cracks, particularly in continuous operation.
  • inductive strip temperature distribution setting devices and a pressure water descaling device are arranged directly in front of the first forming roller in this area.
  • the casting speed is preferably approximately 6 to 10 m / min.
  • Single or multi-part line inductors are used for edge temperature adjustment and plate inductors that can be individually switched on and off, if necessary, for temperature homogenization. With these measures, an adjustment of the inlet temperature of the cast strip into the first roll stand is possible even with a predetermined temperature profile across the width.
  • the entry temperature of the strip into the forming rolls like the casting temperature, is essentially set according to the alloy, ie the steel quality and the final dimension to be achieved during the rolling, ie the degree of deformation by the rolls.
  • Simple duo or quarto roll stands are provided as roll stands, which have at least one roll gap adjustment and a roll bending device.
  • the target profile and the target cross-section are set, as far as possible, which is also influenced by the reel pulling force.
  • a heat treatment zone is provided behind the last stand, one to three stands, depending on the degree of deformation required to achieve the final cross section, which has inductive devices and possibly also cooling devices. Pendulum annealing is carried out here, for example to influence the grain. Furthermore, a temperature maintenance zone in front of the reel be provided. This results in a controlled heat treatment from the rolling heat.
  • Thickness and profile measuring devices are advantageously located behind the rolls in order to control the roll setting, roll bending and the pull-out force from the rolls in order to achieve a tolerance-compliant strip.
  • the entry profile into the rollers is advantageously determined by calculation, the calculation can be checked by measurement. The calculation goes e.g. from the solidification data of the alloy, the calculated instantaneous shape of the casting rolls and possibly from the strip temperature profile across the width.
  • the inductive devices and the casting equipment are advantageously controlled and regulated by an automation system based on Siemens "SIMATIC S5", while the casting rolls, the forming rolls and the reel advantageously control and regulation based on Siemens "Symadin D ".
  • the automation devices are advantageously connected to one another and to a control unit by a bus system.
  • the finished rolled strip has profile deviations below the cold rolling entry tolerance of approximately max. ⁇ 0.025 mm for a 4 mm tape.
  • the individual automation and measuring devices are organized in particular in technology-related automation groups and connected to one another by a feedforward-feedback control system.
  • the control system has an empirical value matrix with an influencing link in the basic form of a self-optimizing neural network with fuzzy input data and automatically generated expert knowledge. This results in a superimposed control system, the relatively simple individual units in an inexpensive design for producing a crack-free strip with tolerances within the control limits of a downstream cold rolling mill can connect and thereby automatically brings with it the experience of how the individual units will react to changed input values and procedure behavior.
  • the tundish or forehead outflow control takes place in a pouring tube or the like, by means of slides with an electric drive, depending on the inlet casting level and predetermined requirements, such as the strip thickness.
  • the inlet casting level or level above the casting rolls can be determined not only by radiometric, but also by optical or float measurements.
  • the necessary coolant control of the inlet area, etc. takes place depending on wall thermocouples or the data of the tundish outflow control in connection with an outflow measurement.
  • An empirical value matrix is also advantageously used for this, which e.g. the alloy influences are taken into account.
  • the casting rolls have a speed and torque control, and the deformation energy currently required is determined very advantageously by cyclical releases of the speed and torque control.
  • the greater the deformation energy currently required the higher the union zone of the two solidification shells formed on the casting rolls above the connection plane of the center lines of the casting rolls and vice versa.
  • the deformation energy currently required is therefore a good control variable.
  • breakthroughs on the exit side can be avoided in a very advantageous manner, as can an excessively high position of the solidification shell union zone.
  • Hanging the union zone to one side can be compensated for by selective cooling.
  • DE 40 21 197 AI shows more about the one-sided hanging of the union zone. The unilateral hanging of the union zone is noticeable eg based on the outlet temperature profile.
  • the casting rolls are controlled in relation to their axis position (distance, offset). Their actual position and shape can be determined, for example, by continuous IR laser measurements and corrected if necessary.
  • the amount of coolant is adjusted, in particular according to the specifications of the inlet area and the casting roll speed. Minor crowning corrections are possible using electrical means, such as induction heating.
  • the extraction of the cast strip is regulated taking into account the small maximum tensile stress on the exit side of the casting rolls.
  • This regulation can be viewed either in connection with the regulation of the roll stands, but also as the regulation of a decoupled stand with a tension regulation by electromagnetic means.
  • a control to constant, maximum mass flow is optimal, depending on the maximum cooling capacity with an adaptation of the roll speed to the casting roll speed.
  • a strip edge temperature and shape check is advantageously carried out. Both the strip edge temperature and the strip edge shape can be done by regulating the cooling and position of the side elements of the casting rolls.
  • the side elements of the casting rolls are advantageously arranged on the circumference of the casting rolls and work advantageously in connection with an inductive heating or cooling as well as a position control, e.g. according to an empirical value matrix.
  • the surfaces of the casting rolls advantageously have a structural pattern, a herringbone or zigzag pattern being particularly advantageous.
  • the structure recesses can be cleaned, for example, by spraying water in connection with a brush system, it being advantageous to control the cleaning by a laser, which can possibly be reworked.
  • an electromagnetically operating belt vibrating device is advantageously provided, which is supplemented if necessary by a likewise advantageous electromagnetic stage or casting roll vibrating device.
  • an image and pattern recognition unit for example with infrared cameras, is advantageously located between the casting rolls and the first forming roll stand, with which the surface condition of the strip is checked.
  • a profile and thickness measuring device may be located in front of the roll stands, which in particular carries out a profile and thickness trend evaluation. This information is particularly useful for the neuro-fuzzy system with its if-then rules, but it can also be evaluated conventionally by differentiation. The same applies to the other trends that are considered.
  • inductive heat treatment with predetermined temperature profiles is advantageously carried out, for example, pendulum annealing at 720 ° C. and / or a subsequent holding at 500 ° C. to 550 ° C. in the case of alloy steel.
  • the downstream reel has a tension control in order to achieve the predetermined final thickness of the strip on the last roll stand while maintaining a minimum and maximum tension.
  • the superimposed control system which also works largely on the basis of mathematical models with adaptation on a neuro-fuzzy basis (largely during network training), is used in particular to coordinate the profile and strip condition achieved in the casting rolls with the downstream units. It is thus possible to advantageously use the casting rolls as well as the forming rolls, e.g. to operate without complex shifting devices (forming rolls) or devices for changing the crown (casting rolls). Based on the empirical value matrix, an optimal response to the existing conditions can be achieved relatively quickly for the different entry conditions into the casting rolls, whose behavior in operation can be determined by simulation and / or tests during commissioning and for the entry conditions into the roll stands.
  • the running-in conditions in particular the running-in temperature, taking into account the available cooling capacity, a tolerance-compliant band can be achieved after a relatively short time with very simple units.
  • estimated values of the parameters of the fuzzy sets are sufficient for the empirical value matrix, and these are improved with the aid of the self-learning neural network.
  • the associated fuzzy rules for processing the fuzzy sets are verified after the previous effect simulation (in particular with regard to critical states) as part of the trial operation and are also included in the empirical value matrix, with the neural network weighting the fuzzy rules accordingly Requirements changed.
  • Cooling zones 1, 11 and III individually controllable cooling zones with regard to the cooling capacity
  • strip profile, strip thickness measuring devices e.g. designed as laser measuring devices, integrated edge profile measuring devices,
  • Casting roll surface parts e.g. made of copper beryllium, possibly coated with tungsten carbide or other carbides

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Metal Rolling (AREA)
  • Control Of Metal Rolling (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Coating With Molten Metal (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

In the continuous casting and rolling plant and associated control system proposed, the design of the individual plant elements is optimized with respect to their combined action and the individual plant elements operated in coordinated fashion to produce steel strip which is suitable for further processing. This coordination is preferably optimized using a neurofuzzy system.

Description

Gieß- alzanlage für Stahlbänder und Regelsystem dafürPouring salt plant for steel strips and control system therefor
Die Erfindung betrifft eine Gieß-Walzanlage für Stahlbänder und ein Regelsystem dafür.The invention relates to a casting and rolling system for steel strips and a control system therefor.
Seit der ersten Gieß-Walzanlage, wie sie im deutschen Patent 52 002 beschrieben ist, sind Gieß-Walzanlagen in großer Zahl und unterschiedlichster Ausführung entwickelt worden. Gemeinsam ist diesen Entwicklungen, daß sie bisher für niedrig legierten Stahl nur zum Erfolg geführt haben, wenn die Gießeinrichtung einen sogenannten Dünnbrammenstrang von mindestens 50 mm Dicke erzeugt (DE 37 12 537 AI) , der dann in das erste Walzengerüst eingeführt wird oder wenn rostfreier Stahl zu Bändern vergossen wird, wie es die EP 0 458 987 AI und EP 0 481 481 AI beschreiben.Since the first casting and rolling system, as described in German Patent 52 002, casting and rolling systems have been developed in large numbers and in a wide variety of designs. Common to these developments is that they have so far only led to success for low-alloy steel if the casting device produces a so-called thin slab strand of at least 50 mm thickness (DE 37 12 537 AI), which is then introduced into the first roll stand or if stainless steel is cast into tapes, as described in EP 0 458 987 AI and EP 0 481 481 AI.
Es ist Aufgabe der Erfindung, eine Gieß-Walzanlage für Stahl¬ bänder und ein Regelsystem dafür anzugeben, die es erlauben, Stahlbänder beliebiger Qualität innerhalb der Weiterverarbeitungstoleranzen herzustellen, wobei von gegossenen Bändern mit einer Dicke zwischen 5 und 20 mm ausgegangen werden soll.It is an object of the invention to provide a casting and rolling system for steel strips and a control system therefor, which allow steel strips of any quality to be produced within the further processing tolerances, with cast strips having a thickness between 5 and 20 mm being assumed.
Die Aufgabe wird dadurch gelöst, daß einzelne Anlagenteile in bezug auf ihr Zusammenwirken zur Erzeugung eines weiter¬ verarbeitungsgerechten Bandes optimiert ausgestaltet und in Abstimmung aufeinander betrieben werden. Die Abstimmung wird vorzugsweise durch ein Neurofuzzy-System optimiert.The object is achieved in that individual system parts are optimized with regard to their interaction to produce a strip suitable for further processing and are operated in coordination with one another. The tuning is preferably optimized by a neurofuzzy system.
Vorteilhafte Einzelheiten der einzelnen Anlagenteile und desAdvantageous details of the individual parts of the system and
Regelsystems sind aus der nachfolgenden Beschreibung ersichtlich.Control systems are evident from the description below.
Ausgehend von einem aus einem Tundish oder Vorherd auslaufenden Gießstrahl soll durch Gießwalzen undStarting from a pouring jet that runs out of a tundish or forehearth, it is supposed to flow through casting rolls and
Nachverformen ein warmgewalztes Band mit einer Dicke von etwaPostform a hot rolled strip with a thickness of approximately
2 bis 4 mm hergestellt werden. In Einzelfällen soll auch eine Dicke von 1 mm erreichbar sein. Hierzu werden Gießwalzeinrichtungen mit den folgenden, z.T. bekannten, elektrotechnischen Grundkomponenten verwendet:2 to 4 mm can be produced. In individual cases, one should also Thickness of 1 mm. For this, casting and rolling devices with the following, partly known, basic electrotechnical components are used:
Schieberverschlußantrieb mit Gießstrahlregelung am Tundish oder Vorherd. Der Gießstrahl läuft in eine Vorkühl- einrichtung, ggf. auch in eine Einlaufkokille ein, und dort wird der Gießspiegel, z.B. durch radiometrische Messung, etwa mit einem Meßgerät der Firma Dr. Berthold, auf ± 3 mm genau eingestellt. Diese Einstellung ist unabhängig vom Querschnitt der Verteilungs- und/oder Vorkühleinrichtung. Diese kann oben offen oder als Kammer ausgebildet sein.Slider closure drive with pouring jet control on the tundish or forehearth. The pouring jet runs into a pre-cooling device, possibly also into an inlet mold, and there the pouring level, e.g. by radiometric measurement, for example with a measuring device from Dr. Berthold, set to an accuracy of ± 3 mm. This setting is independent of the cross section of the distribution and / or pre-cooling device. This can be open at the top or designed as a chamber.
Für die Verteilungs- und Vorkühleinrichtung ist eine Kühlmittelregelung und ggf. eine Rühreinrichtung in Form einer elektrischen Spule vorgesehen. Diese kann ein- oder mehrteilig ausgebildet sein. Die Verteilungs- undA coolant control and, if necessary, a stirring device in the form of an electrical coil are provided for the distribution and precooling device. This can be made in one or more parts. The distribution and
Vorkühleinrichtung kann insbesondere für dickere Querschnitte als Einlaufkokille ausgebildet sein, sie kann aber ebenso als Verteilerrinne oder als kastenartiger Aufsatz mit Abdeckung ausgebildet sein. In der Ausbildung als Einlaufkokille bietet sich etwa die vorteilhaft regelbare Ausbildung an, wie sie in der DE 40 30 683 AI beschrieben ist.Pre-cooling device can be designed as an inlet mold, in particular for thicker cross sections, but it can also be designed as a distribution channel or as a box-like attachment with a cover. In the training as an inlet mold, the advantageously controllable training, as described in DE 40 30 683 AI, is appropriate.
Das Gießwalzenpaar weist vorteilhaft eine Kühlmittelregelung sowie eine Leistungs- und Lageregelung und insbesondere eine Momentanform-Berechnung auf. Die Form der Gießwalzen wird nach den Anforderungen der nachgeschalteten Walzeinrichtungen ausgerichtet, und zwar derart, daß diese mit einem Minimum an Verstellung ein toleranzgerechtes Band liefern. Als besonders geeignet hat sich ein Rechteck-Austrittsprofil herausgestellt, das vorteilhaft z.B. ballige Kanten aufweist. Hinter den Gießwalzen befinden sich vorteilhaft eine elektromagnetische Bandzugregelung und entsprechende Bandumlenkungseinrichtungen, die die bisher üblichen Rollen, die insbesondere im Dauerbetrieb, zu Oberflächenfehlern Anlaß geben können oder das Entstehen von Kantenrissen begünstigen, zumindest teilweise ersetzen. Weiter sind in diesem Bereich induktive Bandtemperatur-Verteilungs-Einstellungseinrich¬ tungen und unmittelbar vor der ersten Verformungswalze eine Druckwasserentzunderungseinrichtung angeordnet. Als Gießgeschwindigkeit sind vorzugsweise etwa 6 bis 10 m/min vorgesehen. Zur Kanten-Temperatureinstellung dienen insbesondere ein- oder mehrteilige Linieninduktoren und zur Temperatur-Homogenisierung, falls notwendig, einzeln zu- und abschaltbare Platteninduktoren. Mit diesen Maßnahmen ist eine Einstellung der Einlauftemperatur des gegossenen Bandes in das erste Walzgerüst sogar mit einem vorgegebenen Temperatur¬ profil über die Breite möglich. Die Eintrittstemperatur des Bandes in die Verformungswalzen wird ebenso wie die Gießtemperatur im wesentlichen nach der Legierung, d.h. nach der Stahlqualität und der Endabmessung, die beim Walzen erreicht werden soll, d.h. dem Verformungsgrad durch die Walzen, eingestellt.The pair of casting rolls advantageously has a coolant control as well as a power and position control and in particular a momentary shape calculation. The shape of the casting rolls is aligned to the requirements of the downstream rolling devices in such a way that they deliver a tolerance-compliant strip with a minimum of adjustment. A rectangular exit profile has been found to be particularly suitable, which advantageously has spherical edges, for example. Behind the casting rolls there is advantageously an electromagnetic belt tension control and corresponding belt deflection devices, which at least partially replace the previously usual rolls, which can give rise to surface defects or promote the occurrence of edge cracks, particularly in continuous operation. Furthermore, inductive strip temperature distribution setting devices and a pressure water descaling device are arranged directly in front of the first forming roller in this area. The casting speed is preferably approximately 6 to 10 m / min. Single or multi-part line inductors are used for edge temperature adjustment and plate inductors that can be individually switched on and off, if necessary, for temperature homogenization. With these measures, an adjustment of the inlet temperature of the cast strip into the first roll stand is possible even with a predetermined temperature profile across the width. The entry temperature of the strip into the forming rolls, like the casting temperature, is essentially set according to the alloy, ie the steel quality and the final dimension to be achieved during the rolling, ie the degree of deformation by the rolls.
Als Walzgerüste sind einfache Duo- oder Quarto-Walzgerüste vorgesehen, die zumindest eine Walzspaltverstellung und eine Walzenbiegeeinrichtung aufweisen. Hier werden ausgehend von dem tatsächlich gegossenen Bandprofil, soweit möglich, das Sollprofil und der Sollquerschnitt eingestellt, der auch noch durch die Haspelzugkraf beeinflußt wird.Simple duo or quarto roll stands are provided as roll stands, which have at least one roll gap adjustment and a roll bending device. Here, based on the actually cast strip profile, the target profile and the target cross-section are set, as far as possible, which is also influenced by the reel pulling force.
Gegebenenfalls befindet sich hinter dem letzten Gerüst, vorgesehen sind ein bis drei Gerüste, je nach notwendigem Verformungsgrad zur Erreichung des Endquerschnitts, eine Wärmebehandlungszone, die induktive Einrichtungen und gegebenenfalls auch Kühleinrichtungen aufweist. Hier wird, z.B. zur Kornbeeinflussung, ein Pendelglühen durchgeführt. Desweiteren kann eine Temperaturhaltezone vor dem Haspel vorgesehen werden. So ergibt sich eine gesteuerte Wärme¬ behandlung aus der Walzhitze.If necessary, a heat treatment zone is provided behind the last stand, one to three stands, depending on the degree of deformation required to achieve the final cross section, which has inductive devices and possibly also cooling devices. Pendulum annealing is carried out here, for example to influence the grain. Furthermore, a temperature maintenance zone in front of the reel be provided. This results in a controlled heat treatment from the rolling heat.
Hinter den Walzen befinden sich vorteilhaft Dicken- und Profilmeßgeräte, um die Walzeneinstellung, Walzenbiegung und die Auszugskraft aus den Walzen zur Erreichung eines toleranzgerechten Bandes zu kontrollieren. Das Eintrittsprofil in die Walzen wird vorteilhaft durch Rechnung bestimmt, die Rechnung kann meßtechnisch überprüft werden. Die Rechnung geht z.B. von den Erstarrungsdaten der Legierung, der gerechneten Momentanform der Gießwalzen und ggf. von dem Bandtemperaturprofil über die Breite aus.Thickness and profile measuring devices are advantageously located behind the rolls in order to control the roll setting, roll bending and the pull-out force from the rolls in order to achieve a tolerance-compliant strip. The entry profile into the rollers is advantageously determined by calculation, the calculation can be checked by measurement. The calculation goes e.g. from the solidification data of the alloy, the calculated instantaneous shape of the casting rolls and possibly from the strip temperature profile across the width.
Die induktiven Einrichtungen und die gießtechnischen Einrichtungen (inkl. Kühltechnik) , werden vorteilhaft durch ein Automatisierungssystem auf der Basis Siemens "SIMATIC S5" gesteuert und geregelt, während die Gießwalzen, die Verformungswalzen und der Haspel vorteilhaft eine Steuerung und Regelung auf der Basis Siemens "Symadin D" aufweisen. Die Automatisierungsgeräte sind vorteilhaft durch ein Bussystem miteinander und mit einer Leiteinheit verbunden. Das fertig¬ gewalzte Band weist Profilabweichungen unterhalb der Kaltwalz-Eintrittstoleranz etwa max. ± 0,025 mm für ein 4 mm- Band auf.The inductive devices and the casting equipment (including cooling technology) are advantageously controlled and regulated by an automation system based on Siemens "SIMATIC S5", while the casting rolls, the forming rolls and the reel advantageously control and regulation based on Siemens "Symadin D ". The automation devices are advantageously connected to one another and to a control unit by a bus system. The finished rolled strip has profile deviations below the cold rolling entry tolerance of approximately max. ± 0.025 mm for a 4 mm tape.
Die einzelnen Automatisierungs- und Meßgeräte sind insbesondere in technologiebezogenen Automatisierungsgruppen organisiert und durch ein feedforward-feedback-Leitsystem miteinander verbunden. In einer besonders bevorzugten Ausführungsart weist das Leitsystem eine Erfahrungswertmatrix mit Beeinflussungsverknüpfung in der Grundform eines selbstoptimierenden neuronalen Netzes mit Fuzzy-Eingangsdaten und automatisch generiertem Expertenwissen auf. So ergibt sich ein überlagertes Leitystem, das relativ einfach gestaltete Einzelaggregate in kostengünstiger Ausführung zur Erzeugung eines rißfreien Bandes mit Toleranzen innerhalb der Regelgrenzen eines nachgeschalteten Kaltwalzwerks miteinander verbinden kann und dabei automatisch die Erfahrungen miteinbringt, wie sich die Einzelaggregate bei veränderten Eingangswerten und Vorgehenverhalten werden.The individual automation and measuring devices are organized in particular in technology-related automation groups and connected to one another by a feedforward-feedback control system. In a particularly preferred embodiment, the control system has an empirical value matrix with an influencing link in the basic form of a self-optimizing neural network with fuzzy input data and automatically generated expert knowledge. This results in a superimposed control system, the relatively simple individual units in an inexpensive design for producing a crack-free strip with tolerances within the control limits of a downstream cold rolling mill can connect and thereby automatically brings with it the experience of how the individual units will react to changed input values and procedure behavior.
In speziellen weiteren Ausgestaltungen der Erfindung ist vorgesehen, daß die Tundish- oder Vorherd-Ausflußregelung in ein Gießrohr o.a., durch Schieber mit elektrischem Antrieb in Abhängigkeit vom Einlaufgießspiegel und vorgegebenen Anforderungen, wie der Banddicke, erfolgt. Der Einlaufgießspiegel bzw. Stand oberhalb der Gießwalzen, kann dabei nicht nur durch radiometrische, sondern auch durch optische oder Schwimmermessungen ermittelt werden.In special further refinements of the invention, it is provided that the tundish or forehead outflow control takes place in a pouring tube or the like, by means of slides with an electric drive, depending on the inlet casting level and predetermined requirements, such as the strip thickness. The inlet casting level or level above the casting rolls can be determined not only by radiometric, but also by optical or float measurements.
Die ggf. notwendige Kühlmittelregelung des Einlaufbereichs o.a. erfolgt in Abhängigkeit von Wandthermoelementen oder den Daten der Tundish-Ausflußregelung in Zusammenhang mit einer Ausflußmengenmessung. Auch hierfür wird vorteilhaft eine Erfahrungswertmatrix verwendet, die z.B. die Legierungsein¬ flüsse berücksichtigt.The necessary coolant control of the inlet area, etc. takes place depending on wall thermocouples or the data of the tundish outflow control in connection with an outflow measurement. An empirical value matrix is also advantageously used for this, which e.g. the alloy influences are taken into account.
Die Gießwalzen besitzen eine Drehzahl- und Drehmomentregelung, dabei erfolgt die Ermittlung der momentan erforderlichen Verformungsenergie sehr vorteilhaft durch zyklische Freigaben der Drehzahl- und der Drehmomentregelung. Je größer die momentan erforderliche Verformungsenergie ist, desto höher befindet sich die Vereinigungszone der beiden auf den Gießwalzen gebildeten Erstarrungsschalen oberhalb der Verbindungsebene der Mittellinien der Gießwalzen und umgekehrt. Die momentan erforderliche Verformungsenergie ist also eine gute Regelgröße. Mit ihrer Verwendung können sehr vorteilhaft Durchbrüche auf die Austrittsseite ebenso vermieden werden wie eine zu hohe Lage der Erstarrungsschalen-Vereinigungszone. Ein Hängen der Vereinigungszone nach einer Seite kann durch eine selektive Kühlung ausgeglichen werden. Ober das einseitige Hängen der Vereinigungszone zeigt die DE 40 21 197 AI näheres. Feststellbar ist das einseitige Hängen der Vereinigungszone z.B. anhand des Austritts-Temperaturprofils. Die Gießwalzen werden in bezug auf ihre Achslage (Abstand, Versatz) gesteuert. Ihre Ist-Lage und Form kann z.B. durch fortlaufende IR-Laser-Messungen ermittelt und ggf. korrigiert werden. Die Kühlmittelmenge wird, insbesondere nach Vorgaben des Einlaufbereichs und der Gießwalzendrehzahl, eingestellt. Geringfügige Balligkeitskorrekturen sind durch elektrische Mittel, z.B. eine Induktionserwärmung, möglich.The casting rolls have a speed and torque control, and the deformation energy currently required is determined very advantageously by cyclical releases of the speed and torque control. The greater the deformation energy currently required, the higher the union zone of the two solidification shells formed on the casting rolls above the connection plane of the center lines of the casting rolls and vice versa. The deformation energy currently required is therefore a good control variable. With their use, breakthroughs on the exit side can be avoided in a very advantageous manner, as can an excessively high position of the solidification shell union zone. Hanging the union zone to one side can be compensated for by selective cooling. DE 40 21 197 AI shows more about the one-sided hanging of the union zone. The unilateral hanging of the union zone is noticeable eg based on the outlet temperature profile. The casting rolls are controlled in relation to their axis position (distance, offset). Their actual position and shape can be determined, for example, by continuous IR laser measurements and corrected if necessary. The amount of coolant is adjusted, in particular according to the specifications of the inlet area and the casting roll speed. Minor crowning corrections are possible using electrical means, such as induction heating.
Der Auszug des gegossenen Bandes wird unter Beachtung der kleinen maximalen Zugspannung an der Auεtrittsseite der Gießwalzen geregelt. Diese Regelung kann entweder in Zusammenhang mit der Regelung der Walzgerüste, aber auch als Regelung eines entkoppelten Gerüsts mit einer Zugregelung durch elektromagnetische Mittel betrachtet werden. Optimal ist eine Regelung auf konstanten, maximalen Massenfluß, abhängig von der maximalen Kühlleistung mit einer Anpassung der Walzendrehzahl an die Gießwalzendrehzahl.The extraction of the cast strip is regulated taking into account the small maximum tensile stress on the exit side of the casting rolls. This regulation can be viewed either in connection with the regulation of the roll stands, but also as the regulation of a decoupled stand with a tension regulation by electromagnetic means. A control to constant, maximum mass flow is optimal, depending on the maximum cooling capacity with an adaptation of the roll speed to the casting roll speed.
Anschließend an den Austritt aus den Gießwalzen erfolgt vorteilhaft eine Bandkantentemperatur- und Formkontrolle. Sowohl die Bandkantentemperatur als auch die Bandkantenform kann durch eine Regelung der Kühlung und Stellung der Seitenelemente der Gießwalzen erfolgen. Die Seitenelemente der Gießwalzen sind vorteilhaft auf dem Umfang der Gießwalzen angeordnet und arbeiten' vorteilhaft in Verbindung mit einer induktiven Heizung oder einer Kühlung sowie einer Lageregelung, z.B. nach einer Erfahrungswertmatrix.Following the exit from the casting rolls, a strip edge temperature and shape check is advantageously carried out. Both the strip edge temperature and the strip edge shape can be done by regulating the cooling and position of the side elements of the casting rolls. The side elements of the casting rolls are advantageously arranged on the circumference of the casting rolls and work advantageously in connection with an inductive heating or cooling as well as a position control, e.g. according to an empirical value matrix.
Die Oberflächen der Gießwalzen weisen vorteilhaft ein Strukturmuster auf, wobei ein Fischgräten- oder Zickzack- Muster besonders vorteilhaft ist. Die Reinigung der Struktur- Vertiefungen kann z.B. durch Spritzwasser in Verbindung mit einem Bürstensystem erfolgen, wobei es vorteilhaft ist, die Reinigung durch einen Laser zu kontrollieren, der gf. eine Nacharbeit vornehmen kann. Für eine einwandfreie Ablösung des Bandes von den Gießwalzen ist vorteilhaft eine elektromagnetisch arbeitende Bandvibrationseinrichtung vorgesehen, die bei Bedarf durch eine ebenfalls vorteilhaft elektromagntische Bühnen- bzw. Gießwalzenvibrationseinrichtung ergänzt wird. Zwischen den Gießwalzen und dem ersten Verformungswalzengerüst befindet sich bei Bedarf auch vorteilhaft eine Bild- und Mustererkennungseinheit, z.B. mit Infrarotkameras, mit der der Oberflächenzustand des Bandes kontrolliert wird. Unter der Annahme, daß sichtbare Zunderrisse, die eine Maximallänge überschreiten, ein Hinweis auf Oberflächenrisse sind (Abweichung vom normalen Rißbild) , desgleichen beidseitige Zunderrisse an den Kanten, wird das Verhalten der elektromagnetischen Einrichtungen entsprechend beeinflußt und gegebenenfalls eine durch induktive Teilerwärmung mögliche Reparatur der Risse vorgenommen. Die Fehlerkorrektur erfolgt durch gezielte elektrische Maßnahmen, bei Kantenrissen unterstützt durch eine Lage- und/oder Heizungs- kühlungsregelung der Kantenbildungs-Leitelemente. So ergibt sich das Einlaufen eines von Makrorissen freien Bandes in das erste Verformungsgerüst, in dem unvermeidlich Mikrorisse und interkristalline Ablösungen verschweißt werden. Vor den Walzgerüsten befindet sich ggf. ein Profil- und Dickenmeßgerät, das insbesondere eine Profil- und Dicken- trendauswertung vornimmt. Diese Angaben dienen insbesondere dem Neuro-FuzzySystem mit seinen Wenn-Dann-Regeln, sie können aber z.B. auch konventionell durch eine Differentiation ausgewertet werden. Das gleiche gilt auch für die übrigen Trends, die betrachtet werden.The surfaces of the casting rolls advantageously have a structural pattern, a herringbone or zigzag pattern being particularly advantageous. The structure recesses can be cleaned, for example, by spraying water in connection with a brush system, it being advantageous to control the cleaning by a laser, which can possibly be reworked. For a perfect detachment of the strip from the casting rolls, an electromagnetically operating belt vibrating device is advantageously provided, which is supplemented if necessary by a likewise advantageous electromagnetic stage or casting roll vibrating device. If required, an image and pattern recognition unit, for example with infrared cameras, is advantageously located between the casting rolls and the first forming roll stand, with which the surface condition of the strip is checked. Assuming that visible scale cracks that exceed a maximum length are an indication of surface cracks (deviation from the normal crack pattern), and likewise scale cracks on both sides at the edges, the behavior of the electromagnetic devices is influenced accordingly and, if necessary, repair of the cracks possible by inductive partial heating performed. The error correction is carried out by targeted electrical measures, in the event of edge cracks supported by a position and / or heating / cooling control of the edge formation guide elements. This results in a tape free of macro cracks entering the first deformation frame, in which micro cracks and intercrystalline detachments are inevitably welded. A profile and thickness measuring device may be located in front of the roll stands, which in particular carries out a profile and thickness trend evaluation. This information is particularly useful for the neuro-fuzzy system with its if-then rules, but it can also be evaluated conventionally by differentiation. The same applies to the other trends that are considered.
Anschließend an das Walzen erfolgt ggf. vorteilhaft eine induktive Wärmebehandlung mit vorgegebenen Temperaturverläufen, z.B. ein Pendelglühen um 720 °C und/oder ein nachfolgendes Halten auf 500 °C bis 550 °C bei legiertem Stahl. Die nachgeschaltete Haspel weist eine Zugregelung auf, um am letzten Walzgerüst unter Einhaltung eines Minimal- und Maximalzugs die vorherbestimmten Enddicke des Bandes zu erreichen.Subsequent to the rolling, inductive heat treatment with predetermined temperature profiles is advantageously carried out, for example, pendulum annealing at 720 ° C. and / or a subsequent holding at 500 ° C. to 550 ° C. in the case of alloy steel. The downstream reel has a tension control in order to achieve the predetermined final thickness of the strip on the last roll stand while maintaining a minimum and maximum tension.
Das überlagerte Leitsystem, das auch wesentlich auf der Basis von mathemtischen Modellen mit Adaption auf Neuro-Fuzzy-Basis arbeitet (weitestgehend bei dem Netztraining) , dient insbesondere zur Abstimmung des in den Gießwalzen erreichten Profils und Bandzustandes mit den nachgeschalteten Aggregaten. So ist es möglich, die Gießwalzen ebenso wie die Verformungswalzen vorteilhaft, z.B. ohne aufwendige Verschiebeeinrichtungen (Verformungswalzen) oder Einrichtungen zur Balligkeitsänderung (Gießwalzen) , zu betreiben. Durch die Erfahrungswertmatrix kann für die unterschiedlichen Einlaufbedingungen in die Gießwalzen, deren Verhalten im betrieb durch Simulation und/oder Versuche im Rahmen der Inbetriebsetzung ermittelt werden kann und für die Eintrittsbedingungen in die Walzgerüste, relativ schnell eine optimale Reaktion auf die vorliegenden Verhältnisse erreicht werden. Abhängig von der Legierung, den Einlaufbedingungen, insbesondere der Einlauf emperatur, kann unter Berücksichtigung der zur Verfügung stehenden Kühlleistung so mit sehr einfachen Aggregaten nach relativ kurzer Zeit ein toleranzgerechtes Band erreicht werden. In der Regel reichen für die Erfahrungswertmatrix abgeschätzte Werte der Parameter der Fuzzy-Sets aus, die mit Hilfe des selbstlernenden neuronalen Netzes verbessert werden. Die zugehörigen Fuzzy- Rules zur Verarbeitung der Fuzzy-Sets werden nach vorhergehender Wirkungs-Simulation (insbesondere in bezug auf kritische Zustände) im Rahmen des Probebetriebs verifiziert und gehen ebenfalls in die Erfahrungswertmatrix ein, wobei das neuronale Netz die Gewichtung der Fuzzy-Rules entsprechend den Anforderungen verändert.The superimposed control system, which also works largely on the basis of mathematical models with adaptation on a neuro-fuzzy basis (largely during network training), is used in particular to coordinate the profile and strip condition achieved in the casting rolls with the downstream units. It is thus possible to advantageously use the casting rolls as well as the forming rolls, e.g. to operate without complex shifting devices (forming rolls) or devices for changing the crown (casting rolls). Based on the empirical value matrix, an optimal response to the existing conditions can be achieved relatively quickly for the different entry conditions into the casting rolls, whose behavior in operation can be determined by simulation and / or tests during commissioning and for the entry conditions into the roll stands. Depending on the alloy, the running-in conditions, in particular the running-in temperature, taking into account the available cooling capacity, a tolerance-compliant band can be achieved after a relatively short time with very simple units. As a rule, estimated values of the parameters of the fuzzy sets are sufficient for the empirical value matrix, and these are improved with the aid of the self-learning neural network. The associated fuzzy rules for processing the fuzzy sets are verified after the previous effect simulation (in particular with regard to critical states) as part of the trial operation and are also included in the empirical value matrix, with the neural network weighting the fuzzy rules accordingly Requirements changed.
Unter dem zentralen Leitsystem mit dem besonders vorteilhaften neuronalen Netz mit Fuzzy-Struktur und Erfahrungswertmatrix zur Vor- oder Direktsteuerung angeord¬ nete, auch z.T. erfinderische, Regelstrukturen ergeben sich aus den beschrifteten Figuren 1 bis 4, die Grundlagen einiger wichtiger Fuzzy-Rules aus der beigefügten Tabelle und wesentliche konstruktive, erfinderische Einzelheiten sowie eine Übersicht über das erfindungsgemäße Regelsystem aus den Figuren 5 bis 8. Under the central control system with the particularly advantageous neural network with fuzzy structure and Experience-based matrix for pre-control or direct control, also partly inventive, control structures result from the labeled Figures 1 to 4, the basics of some important fuzzy rules from the attached table and essential constructive, inventive details and an overview of the control system according to the invention Figures 5 to 8.
Bezugszeichenliste zu Bild 5List of reference symbols for Figure 5
1 Tundish oder Vorherd1 tundish or forehearth
2 Einlaufbehälter oder Verformungskokille2 inlet containers or molds
3 Gießwalzen3 casting rolls
3a Temperaturmeßgerät3a temperature measuring device
4 elektrische Vibrations- und Leiteinrichtungen4 electrical vibration and control devices
5 Flächen und Kanteninduktoren5 surfaces and edge inductors
6 Bild- und Mustererkennungseinheit mit Luftaufblaszone6 Image and pattern recognition unit with air inflation zone
7 Verformungswalzgerüste 7a Entzunderungseinrichtung7 Deformation rolling stands 7a descaling device
7b Profil- und Dickenmeßeinrichtung7b profile and thickness measuring device
7c AusgangsprofiIkontrolleinrichtung7c output professional control device
8 kontin. Wärmebehandlungseinrichtung8 contin. Heat treatment facility
9 Haspel9 reel
10 Kaltwalzwerk10 cold rolling mill
11 Neuro-Fuzzy und Vorausberechnungseinheit11 Neuro-fuzzy and advance calculation unit
12 Erfahrungswertmatrix12 empirical value matrix
13 Fertigungstoleranzeingabe13 Manufacturing tolerance entry
14 Einguß-Zulauf, Gießwalzen- und Auszugs- Steuer- und Regeleinheit14 sprue inlet, casting roll and pull-out control unit
15 Neuro-Fuzzy Rißbild- und Mustererkennungs- einheit mit Luftaufblaszonensteuerung15 Neuro-fuzzy crack pattern and pattern recognition unit with air inflation zone control
16 Walzgerüst-Steuer- und Regelung16 Roll stand control and regulation
17 Wärmebehandlungs-Steuer- und Regelung17 Heat treatment control and regulation
18 Haspelregelung 18 reel control
Bezugszeichenliste zu Bild 6List of reference symbols for Figure 6
1 Gießwalze1 casting roller
2 Gießwalze2 casting roller
Kühlzonen 1,11 und III einzeln in Bezug auf die Kühlleistung beeinflußbare KühlzonenCooling zones 1, 11 and III individually controllable cooling zones with regard to the cooling capacity
3 Form- und Lage-Abtastlaser, trigonometrisch oder mit Pulszählverfahren arbeitend3 shape and position scanning lasers, working trigonometrically or with pulse counting
5 Kühlmittel (Wasser, Salzlösung) Zu- und Ableitung A,B,C, zum Aufbringen einer geregelten Vibration Förderung durch Drehzahl und hubregelbare Kolbenpumpe5 coolant (water, salt solution) supply and discharge lines A, B, C, for applying a controlled vibration conveyed by speed and stroke-adjustable piston pump
9 elektrische, z.B. induktive Gießwalzenform-Korrektur¬ mittel9 electrical, e.g. inductive casting roll shape correction means
10 Gießwalzen-Kantenbeheizungsmittel10 cast roller edge heating agents
11 Lage- und Kühlmittel- bzw. Heizungsregelbare Gießraumseitenbegrenzungen11 Position and coolant or heating-adjustable casting area side limits
12 seitliche Temperaturmeßeinrichtungen, z.B. Thermo¬ elemente in Hüllrohren oder Ultraschallschwinger zur Ausnutzung des Temperaturganges der Stahldichte12 lateral temperature measuring devices, e.g. Thermocouples in cladding tubes or ultrasonic vibrators to take advantage of the temperature response of the steel density
13 gekröpfte, Temperatur- und Formbeeinflußbare Gießwalzenkanten13 cranked edges that can be influenced by temperature and shape
14 Formbeeinflussungsmittel, z.B. induktive Einrichtungen oder Hydraulikverstellzylinder, für die Gießwalzenkante14 shape-influencing agents, e.g. inductive devices or hydraulic adjustment cylinders, for the casting roll edge
15 Höhen- und Lageverstelleinrichtungen der seitlichen Gießraumbegrenzungen, um den Dichtspalt zwischen den seitlichen Gießraumbegrenzungen und den Gießwalzen einzustellen, Bezugszeichenliste zu Bild 715 height and position adjustment devices for the lateral casting space limits in order to set the sealing gap between the lateral casting space limits and the casting rolls, List of reference symbols for Figure 7
1,2 Gießwalzen1.2 casting rolls
3 Gießraum-Mittelkühlkörper, ggf. auch als Verteiler wirkend, läge- und kühlintensitätsregelbar3 Casting chamber middle heat sink, possibly also acting as a distributor, adjustable in length and cooling intensity
4 Bewegungsrichtungspfeile4 directional arrows
5 Kühlmittelöffnungen5 coolant holes
6,7 Ultraschallthermometer oder Thermoelementhüllrohre 8,9 Erstarrungsschalen6.7 ultrasonic thermometer or thermocouple cladding 8.9 solidification shells
10 gegossenes Band10 cast tape
11 ein- oder mehrteilige elektromagnetische Axialzug¬ regelung, Führungs- und/oder Vibrationseinrichtung, ggf. in Abstimmung mit Kühlmittel-Vibrationspumpen für 1 und 2 regelbar11 one- or multi-part electromagnetic axial tension control, guiding and / or vibration device, optionally adjustable in coordination with coolant vibration pumps for 1 and 2
12 Bandprofil-, Banddicken-Meßgeräte, z.B. als Laserme߬ geräte ausgebildet, Kantenprofil-Meßgeräte integriert,12 strip profile, strip thickness measuring devices, e.g. designed as laser measuring devices, integrated edge profile measuring devices,
13 Temperaturverteilungssensoren13 temperature distribution sensors
14 Lagesensoren14 position sensors
15 Vibrationssensoren 15 vibration sensors
Bezugszeichenliste zu BildReference symbol list for picture
1 Mittelteile des Fischgrätenmusters1 Midsection of the herringbone pattern
2 Grätenteile des Fischgrätmusters2 bones of the herringbone pattern
3 Zick-zack-Musterlinien3 zigzag pattern lines
Gießwalzenoberflächenteile, z.B. aus Kupfer- Beryllium, ggf. mit Wolfram-Carbid oder anderen Carbiden beschichtet Casting roll surface parts, e.g. made of copper beryllium, possibly coated with tungsten carbide or other carbides

Claims

Patentansprüche claims
1. Gieß-Walzanlage für Stahlbänder und Regelsystem dafür, d a d u r c h g e k e n n z e i c h n e t, daß einzelne Anlagenteile in bezug auf ihr Zusammenwirken zur Erzeugung eines weiterverarbeitungsgerechten Bandes optimiert ausgestaltet sind und in Abstimmung aufeinander betrieben werden.1. Casting and rolling system for steel strips and control system for making sure that individual parts of the system are designed with regard to their interaction to produce a strip suitable for further processing and are operated in coordination with one another.
2. Gieß-Walzanlage nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, daß die Abstimmung der einzelnen Anlagenteile aufeinander und das Verhalten der Einzelaggregate durch ein Leitsystem, insbesondere ein Neuro-Fuzzy-Leitsystem optimiert wird.2. Casting-rolling system according to claim 1, d a d u r c h g e k e n n e e c h n e t that the coordination of the individual parts of the system to each other and the behavior of the individual units is optimized by a control system, in particular a neuro-fuzzy control system.
3. Gieß-Walzanlage nach Anspruch 1 oder 2, d a d u r c h g e k e n n z e i c h n e t, daß das Leitsystem sich eine Erfahrungwertmatrix generiert, die für die Steuerung und Regelung, insbesondere für Vorsteuerungen, der einzelnen Anlagenteile und ihrer3. Casting-rolling system according to claim 1 or 2, d a d u r c h g e k e n n z e i c h n e t that the control system generates an empirical value matrix that for the control and regulation, in particular for pilot controls, the individual parts of the system and their
Komponenten, verwendet wird.Components.
4. Gieß-Walzanlage nach Anspruch 1,2 oder 3, d a d u r c h g e k e n n z e i c h n e t, daß die Optimierung unter anderem eine Verhaltenssimulation bei verschiedenen, insbesondere kritischen, Eingangszuständen umfaßt.4. Casting-rolling system according to claim 1, 2 or 3, that the optimization comprises, among other things, a behavior simulation in various, in particular critical, input states.
5. Gieß-Walzanlage nach Anspruch 1,2,3 oder 4, d a d u r c h g e k e n n z e i c h n e t, daß die Gießwalzenpositionen und die Positionen der damit zusammenhängenden Elemente durch Stellglieder mit Absolut- lagegebern o.a. angesteuert werden, wobei das Leitsystem die Werte der Absolutlageregler vorgibt und über das Ergebnis am Band oder an Bandsegmenten Korrekturkreise herstellt. 5. Casting and rolling system according to claim 1, 2, 3 or 4, characterized in that the casting roll positions and the positions of the associated elements are controlled by actuators with absolute position sensors or the like, the control system specifying the values of the absolute position controllers and the result on Band or band segments on correction circles.
6. Gieß-Walzanlage nach Anspruch 1,2,3,4 oder 5, d a d u r c h g e k e n n z e i c h n e t, daß Korrekturwerte zur Steuerung vorzugsweise der Erfahrungswertmatrix entnommen werden, wobei das Neurofuzzy- System die Verknüpfung und gegenseitige Beeinflussung, insbesondere unter Berücksichtigung des Zeitverhaltens der Korrekturauswirkungen, vornimmt.6. Casting-rolling system according to claim 1, 2, 3, 4 or 5, that a correction of correction values for control are preferably taken from the empirical value matrix, the neurofuzzy system carrying out the linking and mutual influencing, in particular taking into account the time behavior of the correction effects.
7. Gieß-Walzanlage nach Anspruch 1,2,3,4,5 oder 6, d a d u r c h g e k e n n z e i c h n e t, daß eine Hauptregelgröße der Gießwalzen die Lage der Vereinigungszone der gebildeten Bandschalen ist, wobei die Lage der Vereinigungszone durch die Momentan- Umformkraftanforderung der Gießwalzen bestimmt wird.7. Casting-rolling plant according to claim 1, 2, 3, 4, 5 or 6, so that a main controlled variable of the casting rolls is the position of the union zone of the band shells formed, the position of the union zone being determined by the instantaneous forming force requirement of the casting rolls.
8. Gieß-Walzanlage nach Anspruch 1,2,3,4,5,6 oder 7, d a d u r c h g e k e n n z e i c h n e t, daß sie elektromagnetische Mittel zur Längs- und Querbewegung und/oder Führung des Bandes im Bereich hinter den Gießwalzen aufweist.8. Casting-rolling system according to claim 1, 2, 3, 4, 5, 6 or 7, so that it has electromagnetic means for longitudinal and transverse movement and / or guiding of the strip in the area behind the casting rolls.
9. Gieß-Walzanlage nach einem oder mehreren der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t, daß vor den Gießwalzen eine Bandvorformungskokille angeordnet ist, so daß die Gießwalzen im wesentlichen als Verformungs¬ walzen wirken.9. Casting-rolling plant according to one or more of the preceding claims, that a and a c e n c e n c e n c e that a strip preforming mold is arranged in front of the casting rolls, so that the casting rolls essentially act as deformation rolls.
10. Gieß-Walzanlage nach Anspruch 9, d a d u r c h g e k e n n z e i c h n e t, daß das Neuro-Fuzzy-Leitsystem und die Erfahrungswertmatrix die Bandvorformungskokille und ihr Verhalten mit einbezieht. 10. Casting and rolling system according to claim 9, d a d u r c h g e k e n n z e i c h n e t that the neuro-fuzzy control system and the empirical value matrix includes the strip preforming mold and its behavior.
PCT/DE1993/001228 1993-12-01 1993-12-21 Continuous casting and rolling plant for steel strip, and a control system for such a plant WO1995015233A1 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US08/647,949 US6044895A (en) 1993-12-21 1993-12-21 Continuous casting and rolling system including control system
EP94902613A EP0732979B1 (en) 1993-12-01 1993-12-21 Continuous casting and rolling plant for steel strip, and a control system for such a plant
DE59308416T DE59308416D1 (en) 1993-12-01 1993-12-21 CASTING ROLLING SYSTEM FOR STEEL TAPES AND CONTROL SYSTEM THEREFOR
SK681-96A SK68196A3 (en) 1993-12-01 1993-12-21 Continuous casting and rolling plant for steel strip, and a control system for such a plant
JP7515321A JPH09506296A (en) 1993-12-01 1993-12-21 Casting and rolling equipment for steel strip and its adjusting system
BR9307904A BR9307904A (en) 1993-12-01 1993-12-21 Casting lamination installation for steel tapes and regulation system
KR1019960702865A KR960706382A (en) 1993-12-01 1993-12-21 CONTINUOUS CASTING AND ROLLING PLANT FOR STEEL STRIP AND A CONTROL SYSTEM FOR SUCH A PLANT
CA002177831A CA2177831C (en) 1993-12-01 1993-12-21 Continuous casting and rolling plant for steel strip, and a control system for such a plant
FI962295A FI102737B1 (en) 1993-12-01 1996-05-31 Steel strip foundry-rolling mill and its adjustment system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEPCT/DE93/01146 1993-12-01
DE9301146 1993-12-01

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WO1995015233A1 true WO1995015233A1 (en) 1995-06-08

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JP (1) JPH09506296A (en)
KR (1) KR960706382A (en)
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EP1060385A1 (en) * 1998-02-10 2000-12-20 Philip Morris Products Inc. Process control by transient thermography
WO2003045607A2 (en) * 2001-11-30 2003-06-05 Voest-Alpine Industrieanlagenbau Gmbh & Co Method for continuous casting
WO2004080628A1 (en) * 2003-03-10 2004-09-23 Siemens Aktiengesellschaft Continuous casting and rolling installation for producing a steel strip
WO2006042606A1 (en) * 2004-10-13 2006-04-27 Siemens Vai Metals Technologies Gmbh & Co Method and device for continuously producing a thin metal strip
CN100402166C (en) * 2006-03-07 2008-07-16 中冶赛迪工程技术股份有限公司 Leveling machine
WO2009018957A1 (en) * 2007-08-04 2009-02-12 Sms Siemag Ag Method for the production of a strip made of steel
US8205474B2 (en) 2006-03-08 2012-06-26 Nucor Corporation Method and plant for integrated monitoring and control of strip flatness and strip profile

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DE102007004053A1 (en) * 2007-01-22 2008-07-31 Siemens Ag Casting plant for casting a cast product and method for guiding a cast material from a casting container of a casting plant
EP2412460B1 (en) * 2010-07-26 2019-04-10 Primetals Technologies Italy S.R.L. Apparatus and method for production of metal elongated products
RU2603412C2 (en) * 2015-02-10 2016-11-27 федеральное государственное автономное образовательное учреждение высшего образования "Самарский государственный аэрокосмический университет имени академика С.П. Королева (национальный исследовательский университет)" (СГАУ) Device for direct rolling of liquid metal

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EP0481481A1 (en) * 1990-10-19 1992-04-22 Nippon Steel Corporation Process for production of austenitic stainless steel thin cast strip and strip obtained thereby
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DE3624114A1 (en) * 1986-07-17 1988-01-21 Max Planck Inst Eisenforschung DEVICE FOR PRODUCING ROLLABLE SHEET FROM MELTING METAL
DE3712537A1 (en) * 1987-04-13 1988-11-10 Thyssen Stahl Ag Method for the production of a steel strip
EP0326190A2 (en) * 1987-04-13 1989-08-02 Thyssen Stahl Aktiengesellschaft Apparatus for manufacturing a steel strip having a thickness between 2 and 25 mm
EP0384151A1 (en) * 1989-02-18 1990-08-29 Sms Schloemann-Siemag Aktiengesellschaft Installation for producing of steel band
EP0391823A1 (en) * 1989-04-06 1990-10-10 Techmetal Promotion Method and apparatus for manufacturing thin metal products by continuous casting
EP0458987A1 (en) * 1989-12-20 1991-12-04 Nippon Steel Corporation Process for producing thin austenitic stainless steel plate and equipment therefor
EP0481481A1 (en) * 1990-10-19 1992-04-22 Nippon Steel Corporation Process for production of austenitic stainless steel thin cast strip and strip obtained thereby
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1060385A1 (en) * 1998-02-10 2000-12-20 Philip Morris Products Inc. Process control by transient thermography
EP1060385A4 (en) * 1998-02-10 2001-05-16 Philip Morris Prod Process control by transient thermography
WO2003045607A2 (en) * 2001-11-30 2003-06-05 Voest-Alpine Industrieanlagenbau Gmbh & Co Method for continuous casting
WO2003045607A3 (en) * 2001-11-30 2003-11-27 Voest Alpine Ind Anlagen Method for continuous casting
WO2004080628A1 (en) * 2003-03-10 2004-09-23 Siemens Aktiengesellschaft Continuous casting and rolling installation for producing a steel strip
AU2005297538B8 (en) * 2004-10-13 2010-07-15 Primetals Technologies Austria GmbH Method and device for continuously producing a thin metal strip
AU2005297538B2 (en) * 2004-10-13 2010-07-01 Primetals Technologies Austria GmbH Method and device for continuously producing a thin metal strip
WO2006042606A1 (en) * 2004-10-13 2006-04-27 Siemens Vai Metals Technologies Gmbh & Co Method and device for continuously producing a thin metal strip
CN100402166C (en) * 2006-03-07 2008-07-16 中冶赛迪工程技术股份有限公司 Leveling machine
US8205474B2 (en) 2006-03-08 2012-06-26 Nucor Corporation Method and plant for integrated monitoring and control of strip flatness and strip profile
US8365562B2 (en) * 2006-03-08 2013-02-05 Nucor Corporation Method and plant for integrated monitoring and control of strip flatness and strip profile
WO2009018957A1 (en) * 2007-08-04 2009-02-12 Sms Siemag Ag Method for the production of a strip made of steel
AU2008285980B2 (en) * 2007-08-04 2011-03-10 Sms Siemag Ag Method for the production of a strip made of steel

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CA2177831C (en) 2005-06-21
DE59308416D1 (en) 1998-05-20
EP0732979B1 (en) 1998-04-15
FI962295A (en) 1996-05-31
RU2121408C1 (en) 1998-11-10
CA2177831A1 (en) 1995-06-08
ES2115205T3 (en) 1998-06-16
ATE165029T1 (en) 1998-05-15
JPH09506296A (en) 1997-06-24
BR9307904A (en) 1996-08-27
FI962295A0 (en) 1996-05-31
EP0732979A1 (en) 1996-09-25
FI102737B (en) 1999-02-15
FI102737B1 (en) 1999-02-15
KR960706382A (en) 1996-12-09
SK68196A3 (en) 1997-10-08

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