EP1567681A1 - Method for process control or process regulation of a unit for moulding, cooling and/or thermal treatment of metal - Google Patents
Method for process control or process regulation of a unit for moulding, cooling and/or thermal treatment of metalInfo
- Publication number
- EP1567681A1 EP1567681A1 EP03789055A EP03789055A EP1567681A1 EP 1567681 A1 EP1567681 A1 EP 1567681A1 EP 03789055 A EP03789055 A EP 03789055A EP 03789055 A EP03789055 A EP 03789055A EP 1567681 A1 EP1567681 A1 EP 1567681A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- metal
- structural
- value
- recorded
- model
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 57
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 30
- 239000002184 metal Substances 0.000 title claims abstract description 30
- 238000001816 cooling Methods 0.000 title claims abstract description 27
- 238000004886 process control Methods 0.000 title claims abstract description 19
- 238000000465 moulding Methods 0.000 title abstract 2
- 238000007669 thermal treatment Methods 0.000 title abstract 2
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 230000009466 transformation Effects 0.000 claims description 16
- 229910001566 austenite Inorganic materials 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- 239000004411 aluminium Substances 0.000 abstract 1
- 238000005096 rolling process Methods 0.000 description 17
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000002604 ultrasonography Methods 0.000 description 4
- 238000012937 correction Methods 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- 230000005670 electromagnetic radiation Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000003746 solid phase reaction Methods 0.000 description 2
- 238000010671 solid-state reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000005555 metalworking Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004393 prognosis Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
- 238000004154 testing of material Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
- C21D11/005—Process control or regulation for heat treatments for cooling
-
- 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
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
- B21B37/76—Cooling control on the run-out table
-
- 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
- B21B38/006—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring temperature
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
Definitions
- the invention relates to a method for process control or process regulation of a plant for the forming, cooling and / or heat treatment of metal, in particular steel or aluminum, the plant being equipped with actuators for setting certain operating parameters and the process being based on a process model.
- Operating parameters are understood to mean, for example, the roll settings in a rolling section or the cooling parameters in a cooling section.
- Microstructure optimizer depending on the desired material properties of the Metal are determined.
- the expected material and usage properties are determined by means of a structure observer. There follows a comparison between target values and the values determined by the structural observer for the material and usage properties. If there is a difference between the observed or calculated and the determined values, the operating parameters such as the inlet and outlet temperature of the rolling section and the degrees of reduction are changed.
- WO 99/24182 also explains the changes in the structure of steel during rolling, while DE 199 41 600 A1 and DE 199 41 736 A1 describe the ⁇ - ⁇ structure transformation of steel in more detail.
- the object of the invention is to provide a method for process control or process control of a system for the forming, cooling and / or heat treatment of metal, in particular steel or aluminum, with which it is possible to obtain desired structural details online and using desired structure-property relationships Target material properties.
- the task is solved by systematically linking the process model, an online recording of at least one current structural parameter, for example at the end of the process to be controlled, and a structural model.
- the prediction models should include a structural model, i.e. a prognosis model for predicting the solid-state reactions taking place during the forming process, for example in the rolling mill, or cooling in the cooling section and the resulting structural features.
- an online adaptation of the method model and / or the structure model should preferably be carried out. If the difference exceeds a certain value in an actual-target value comparison, the process model (for example the pass schedule model or the cooling section model) and the microstructure model are recalculated.
- a current microstructure size value and / or a microstructure transformation time or the microstructure transformation time interval is preferably recorded as the value meaningful for the microstructure.
- the detection of the current structural characteristic value is preferably carried out by means of non-destructive material testing devices, such as by means of ultrasound measuring devices, and here in particular laser-generated ultrasound measuring devices, and X-ray devices.
- Measuring devices that contact the metal should preferably be used to determine the structural change. This includes rolling force measuring devices and measuring rollers for the detection of tensile and tensile stresses on the metal strip during forming. The one with the ⁇ - - Conversion of longitudinal expansion of the metallic steel grid can thus be recorded as a measure of the structural transformation via these touching measuring devices.
- the transformation temperature is recorded online as the meaningful value for the structure by means of at least one temperature detection unit, which is arranged to be relatively movable along the metal conveying direction and depending on the expected location of the structure transformation, which is predicted according to the structure model becomes.
- a plurality of temperature detection units are preferably provided.
- the austenite grain size of the structure of the metal to be processed is predicted at a specific point in the process or at a specific location in the process .
- the current austenite grain size of the metallic structure is recorded online - in this case during a rolling process - behind the last rolling stand of the rolling mill without contact or non-destructive.
- the currently recorded austenite grain size value is compared with a specified target value for the size of the structure's austenite grain at this point in the process.
- a correction value for controlling the actuators of the rolling mill is derived from the difference value, using the microstructure and process model on which the rolling mill is based, and is given to the actuators accordingly. If, for example, the measured austenite grain size is smaller than a target value, a correction value is applied to the actuators for the intermediate stand cooling of the rolling mill in order to reduce the intermediate stand cooling and thus an increase in the To reach the final rolling temperature. By increasing the final rolling temperature, a larger grain size of the austenitic structure is set at the end of the rolling mill. Since even slight changes in the finish rolling temperature have a significant influence on the austenite grain size, the control of the system still affects the metal strip or sheet currently being treated, ie the grain size can still be adjusted to the setpoint on the same strip.
- the current value which is meaningful for the structure, is recorded online during the metalworking process by forming, cooling and / or heat treatment at a specific point, i.e. on the stand (s) or stitch (s) with targeted control of the process parameters for the previous stands (n-1) or stitches (n-1) depending on the actual-target value comparison made.
- the structural grain size of the metal strip or metal sheet is recorded before the forming in the frame (s) of a hot wide strip mill or before the forming in the stitch (s) of a heavy plate mill, for example using an ultrasound device. If the actual value deviates too much from a target value, the process model, in particular the pass schedule model, and the microstructure model are recalculated with effects on the control signals for the actuators of the upstream stands or the actuators for performing the previous stitches, so that the desired target size is achieved can be.
- the changeover of the previous stands can already be done online for the currently rolled strip or sheet and / or can be used for the subsequent strip or sheet.
- an online microstructure control takes place in a cooling section of a wire mill with a water cooling section and an air cooling section, in that an actual microstructure size value, here the austenite grain size, of the metal wire is detected by means of an ultrasound measuring device after passing through the water cooling section and the temperature of the structural transformation as well as the time course of the structural transformation, ie the ⁇ - ⁇ transformation, is recorded with temperature measuring devices that can be moved in the transport direction and / or can be oriented differently. If the recorded values deviate from the planned target values, a new calculation is made using the cooling section and microstructure models, and the actuators of the cooling section are set accordingly online.
- an actual microstructure size value here the austenite grain size
- the proposed online microstructure control or regulation is not only used on hot wide strip, possibly also thin slab rolling, heavy plate, profile, bar steel and wire mills, but also on cold strip and aluminum mills.
Abstract
According to the invention, a method for process control or process regulation of a unit for moulding, cooling and/or thermal treatment of metal, in particular for steel or aluminium, whereby the unit is provided with actuators for setting particular operating parameters and the method process is based on a method model can be achieved, with which it is possible to adjust online desired structural features and, by using structural property relationships, desired material properties can be adjusted, whereby at least one current value predictive of the metal structure is recorded online and, depending on said value, suitable process control and/or process regulation parameters for acting on the actuators to set desired structure properties of the metal are determined using a structural model and the method model on which the process is based.
Description
Verfahren zur Prozesssteuerung oder Prozessregelung einer Anlage zur Umformung, Kühlung und/oder Wärmebehandlung von MetallProcess control process control system for metal forming, cooling and / or heat treatment
Die Erfindung betrifft ein Verfahren zur Prozesssteuerung oder Prozessregelung einer Anlage zur Umformung, Kühlung und/oder Wärmebehandlung von Metall, insbesondere von Stahl oder Aluminium, wobei die Anlage mit Stellgliedern zur Einstellung bestimmter Betriebsparameter ausgerüstet ist und dem Verfahrensprozess ein Verfahrensmodell zugrundeliegt.The invention relates to a method for process control or process regulation of a plant for the forming, cooling and / or heat treatment of metal, in particular steel or aluminum, the plant being equipped with actuators for setting certain operating parameters and the process being based on a process model.
Unter Betriebsparametern werden beispielsweise die Walzenanstellungen in einer Walzstrecke oder die Kühlparameter in einer Kühlstrecke verstanden.Operating parameters are understood to mean, for example, the roll settings in a rolling section or the cooling parameters in a cooling section.
Aus der DE 199 41 600 A1 sowie aus der DE 199 41 736 A1 sind Verfahren zur Prozessführung und Prozessoptimierung beim Warmwalzen von Metall bekannt, wobei die vom heißen Metall emittierte elektromagnetische Strahlung als Spektrum online erfasst und ausgewertet wird oder wobei die von einem Röntgenstrahier emittierte elektromagnetische Strahlung des Metalls, hier ein Me- tallband, durchdringt und auf der Rückseite des Metallbandes online erfaßt und ausgewertet wird, mit der Auswertung kristallografische und/oder Gefügeumwandlungen und/oder chemische Umwandlungen, die bei bestimmten Temperaturen des Metalles erfolgen, ermittelt werden und in Abhängigkeit vom Umwandlungsgrad bzw. vom Umwandlungsverlauf geeignete Prozesssteuer- und/oder Prozessregelgrößen zur Prozeßoptimierung abgeleitet werden und/oder eine online Adaption der Prozessmodelle durchgeführt wird.From DE 199 41 600 A1 and from DE 199 41 736 A1, processes for process control and process optimization during hot rolling of metal are known, the electromagnetic radiation emitted by the hot metal being recorded and evaluated online as a spectrum, or the electromagnetic radiation emitted by an X-ray emitter Radiation of the metal, here a metal strip, penetrates and is recorded and evaluated online on the back of the metal strip, with the evaluation of crystallographic and / or structural changes and / or chemical conversions that take place at certain temperatures of the metal, and are determined as a function of it Suitable process control and / or process control variables for process optimization are derived from the degree of conversion or from the course of the conversion and / or an online adaptation of the process models is carried out.
Es ist ebenfalls bekannt, die Prozesssteuerung alleine mittels Gefügemodellen vorzunehmen. Nach der WO 99/24182 sollen die Betriebsparameter einer hüt- tentechnischen Anlage zur Behandlung von Stahl oder Aluminium mittels einesIt is also known to carry out the process control solely by means of structural models. According to WO 99/24182, the operating parameters of a metallurgical plant for treating steel or aluminum by means of a
Gefügeoptimierers in Abhängigkeit der gewünschten Materialeigenschaften des
Metalls bestimmt werden. Mittels eines Gefügebeobachters werden die zu erwartenden Material- und Gebrauchseigenschaften ermittelt. Es folgt ein Vergleich zwischen Sollwerten und den von dem Gefügebeobachter ermittelten Werten für die Material- und Gebrauchseigenschaften. Sofern eine Differenz zwischen den beobachteten bzw. berechneten und den ermittelten Werten vor- liegt, werden die Betriebsparameter, wie Eingangs- und Ausgangstemperatur der Walzstrecke sowie die Reduktionsgrade, verändert.Microstructure optimizer depending on the desired material properties of the Metal are determined. The expected material and usage properties are determined by means of a structure observer. There follows a comparison between target values and the values determined by the structural observer for the material and usage properties. If there is a difference between the observed or calculated and the determined values, the operating parameters such as the inlet and outlet temperature of the rolling section and the degrees of reduction are changed.
In der WO 99/24182 sind zudem die Veränderungen des Gefüges von Stahl beim Walzen erläutert, während die DE 199 41 600 A1 bzw. DE 199 41 736 A1 die γ-α-Gefügeumwandlung von Stahl näher beschrieben.WO 99/24182 also explains the changes in the structure of steel during rolling, while DE 199 41 600 A1 and DE 199 41 736 A1 describe the γ-α structure transformation of steel in more detail.
Aufgabe der Erfindung ist es, ein Verfahren zur Prozesssteuerung oder Prozessregelung einer Anlage zur Umformung, Kühlung und/oder Wärmebehandlung von Metall, insbesondere von Stahl oder Aluminium, bereitzustellen, mit dem es möglich ist, online gewünschte Gefügebesonderheiten und unter Verwendung von Gefüge-Eigenschaftsrelationen gewünschte Werkstoffeigenschaften gezielt einzustellen.The object of the invention is to provide a method for process control or process control of a system for the forming, cooling and / or heat treatment of metal, in particular steel or aluminum, with which it is possible to obtain desired structural details online and using desired structure-property relationships Target material properties.
Diese Aufgabe wird durch das Verfahren mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Weiterentwicklungen sind in den Unteransprüchen beschrieben.This object is achieved by the method with the features of claim 1. Advantageous further developments are described in the subclaims.
Verfahrensgemäß wird vorgeschlagen, dass online mindestens ein aktueller, für das Gefüge aussagekräftiger Wert erfasst und in Abhängigkeit dieses Wertes geeignete Prozesssteuerung- und/oder Prozessregelgrößen zur Einwirkung auf die Anlagen-Stellglieder ermittelt werden unter Verwendung eines Gefügemodells, das die während der Umformung, Kühlung und/oder Wärmebehandlung ablaufenden Festkörperreaktionen beschreibt, sowie des dem Prozess zugrundeliegenden Verfahrensmodells, das zur Sicherstellung des automatisierten Prozessablaufes dient. Hierzu wird der erfasste aktuelle Ist-Gefügekennwert mit einem vorgegebenen Sollwert verglichen und ein sich ergebender Differenzwert
als Regelungsgröße für den Prozess unter Nutzung von Gefüge- und Verfahrensmodellen verwendet.It is proposed in accordance with the method that online at least one current value that is meaningful for the structure is determined and, depending on this value, suitable process control and / or process control variables for influencing the system actuators are determined using a structure model that determines the during forming, cooling and / or describes heat treatment solid-state reactions and the process model on which the process is based, which serves to ensure the automated process flow. For this purpose, the current actual structural characteristic value is compared with a predetermined target value and a resulting difference value used as a control variable for the process using structural and procedural models.
Die Aufgabe wird durch gezielte Verknüpfung des Verfahrensmodells, einer online Erfassung mindestens eines aktuellen Gefügekennwertes, beispielsweise am Ende des zu steuernden Prozesses, sowie eines Gefügemodells gelöst. Verfahrensgemäß sollen die Vorhersagemodelle ein Gefügemodell einschließen, d.h. ein Prognosemodell zur Vorhersage der während der Umformung, beispielsweise im Walzwerk, oder einer Abkühlung in der Kühlstrecke ablaufenden Festkörperreaktionen und der sich dabei einstellenden Gefügebesonder- heiten.The task is solved by systematically linking the process model, an online recording of at least one current structural parameter, for example at the end of the process to be controlled, and a structural model. According to the method, the prediction models should include a structural model, i.e. a prognosis model for predicting the solid-state reactions taking place during the forming process, for example in the rolling mill, or cooling in the cooling section and the resulting structural features.
Vorzugsweise soll in Abhängigkeit des für das Gefüge aussagekräftigen er- fassten Wertes eine online Adaption des Verfahrensmodells und/oder des Gefügemodells durchgeführt werden. Wenn bei einem Ist-Sollwert-Vergleich die Differenz einen bestimmten Wert überschreitet, erfolgt eine neue Berechnung des Verfahrensmodells (beispielsweise des Stichplanmodells oder des Kühlstreckenmodells) und des Gefügemodells.Depending on the value that is meaningful for the structure, an online adaptation of the method model and / or the structure model should preferably be carried out. If the difference exceeds a certain value in an actual-target value comparison, the process model (for example the pass schedule model or the cooling section model) and the microstructure model are recalculated.
Als der für das Gefüge aussagekräftige Wert wird vorzugsweise ein aktueller Gefügekorngrößen-Wert und/oder ein Gefügeumwandlungs-Zeitpunkt oder das Gefügeumwandlungs-Zeitintervall erfasst.A current microstructure size value and / or a microstructure transformation time or the microstructure transformation time interval is preferably recorded as the value meaningful for the microstructure.
Die Erfassung des aktuellen Gefügekennwertes, insbesondere eines Gefügekorngrößen-Wertes, erfolgt bevorzugt mittels Geräten der zerstörungsfreien Werkstoffprüfung, wie mittels Ultraschallmessgeräten, und hier insbesondere lasergenerierten Ultraschallmessgeräten, sowie Röntgengeräten.The detection of the current structural characteristic value, in particular a structural grain size value, is preferably carried out by means of non-destructive material testing devices, such as by means of ultrasound measuring devices, and here in particular laser-generated ultrasound measuring devices, and X-ray devices.
Für die Erfassung der Gefügeumwandlung sollen vorzugsweise das Metall berührende Meßeinrichtungen zur Anwendung kommen. Hierunter fallen Walz- kraftmessgeräte sowie Messrollen zur Erfassung von auf das Metallband wirkenden Dehn- und Zugspannungen bei der Umformung. Die mit der γ- -
Umwandlung verbundene Längendehnung des metallischen Stahlgitters kann somit als Maß für die Gefügeumwandlung über diese berührenden Messgeräte erfasst werden.Measuring devices that contact the metal should preferably be used to determine the structural change. This includes rolling force measuring devices and measuring rollers for the detection of tensile and tensile stresses on the metal strip during forming. The one with the γ- - Conversion of longitudinal expansion of the metallic steel grid can thus be recorded as a measure of the structural transformation via these touching measuring devices.
Nach einer weiteren Ausführungsform wird die Umwandlungstemperatur als der für das Gefüge aussagekräftige Wert mittels mindestens einer Temperatur- Erfassungseinheit online erfasst, die jeweils längs zur Metallförderrichtung relativ beweglich angeordnet ist und in Abhängigkeit des zu erwartenden Ortes der Gefügeumwandlung, der nach dem Gefügemodell vorhergesagt wird, positioniert wird. Vorzugsweise sind mehrere Temperatur-Erfassungseinheiten vorge- sehen.According to a further embodiment, the transformation temperature is recorded online as the meaningful value for the structure by means of at least one temperature detection unit, which is arranged to be relatively movable along the metal conveying direction and depending on the expected location of the structure transformation, which is predicted according to the structure model becomes. A plurality of temperature detection units are preferably provided.
Nachfolgend wird das vorgeschlagene Verfahren anhand von bevorzugten Ausführungsformen näher beschrieben.The proposed method is described in more detail below on the basis of preferred embodiments.
Für die Stahlgruppe eines C-Mn-Stahles erfolgt unter Anwendung von Gefügemodellen, ausgehend von der chemischen Zusammensetzung, und unter Berücksichtigung des Stichplans im Walzwerk eine Vorausberechnung der Austenitkorngröße des Gefüges des zu bearbeitenden Metalls zu einem bestimmten Verfahrenszeitpunkt bzw. an einem bestimmten Ort im Prozess. Es wird online - in diesem Fall bei einem Walzprozess - hinter dem letzten Walzgerüst der Walzstraße die aktuelle Austenitkorngröße des metallischen Gefüges berührungslos bzw. zerstörungsfrei erfasst. Der aktuell erfasste Austenitkorn- größen-Wert wird mit einem vorgegebenen Sollwert für die Größe des Austenti- korns des Gefüges an dieser Stelle im Prozess verglichen. Tritt eine Abwei- chung zwischen dem Ist- und dem Sollwert auf, wird aus dem Differenz-Wert ein Korrekturwert zur Steuerung der Stellglieder der Walzstraße, unter Nutzung des Gefüge- und Verfahrensmodells, das der Walzstraße zugrundeliegt, abgeleitet und den Stellgliedern entsprechend aufgegeben. Ist beispielsweise die gemessene Austentitkorngröße kleiner als ein Sollwert, wird ein Korrekturwert auf die Stellglieder für die Zwischengerüstkühlung der Walzstraße aufgegeben, um die Zwischengerüstkühlung zu reduzieren und somit eine Erhöhung der
Endwalztemperatur zu erreichen. Durch Erhöhung der Endwalztemperatur wird eine größere Korngröße des austenitischen Gefüges am Ende der Walzstraße eingestellt. Da bereits geringfügige Änderungen der Endwalztemperatur die Austenitkorngröße signifikant beeinflussen, wirkt die Steuerung bzw. Regelung der Anlage noch auf das aktuell behandelte Metallband oder Blech zurück, d.h. die Einstellung der Korngröße auf den Sollwert ist noch am gleichen Band möglich.For the steel group of a C-Mn steel, using structural models based on the chemical composition and taking into account the pass schedule in the rolling mill, the austenite grain size of the structure of the metal to be processed is predicted at a specific point in the process or at a specific location in the process , The current austenite grain size of the metallic structure is recorded online - in this case during a rolling process - behind the last rolling stand of the rolling mill without contact or non-destructive. The currently recorded austenite grain size value is compared with a specified target value for the size of the structure's austenite grain at this point in the process. If there is a discrepancy between the actual and the target value, a correction value for controlling the actuators of the rolling mill is derived from the difference value, using the microstructure and process model on which the rolling mill is based, and is given to the actuators accordingly. If, for example, the measured austenite grain size is smaller than a target value, a correction value is applied to the actuators for the intermediate stand cooling of the rolling mill in order to reduce the intermediate stand cooling and thus an increase in the To reach the final rolling temperature. By increasing the final rolling temperature, a larger grain size of the austenitic structure is set at the end of the rolling mill. Since even slight changes in the finish rolling temperature have a significant influence on the austenite grain size, the control of the system still affects the metal strip or sheet currently being treated, ie the grain size can still be adjusted to the setpoint on the same strip.
Bei einer weiteren bevorzugten Verfahrensvariante erfolgt die online-Erfassung des aktuellen, für das Gefüge aussagekräftigen Wertes während des Prozesses der Metallbearbeitung durch Umformung, Kühlung und/oder Wärmebehandlung an einem bestimmten Punkt, d.h. am Gerüst (n) oder Stich (n) mit einer gezielten Steuerung der Prozeßparameter für die vorherigen Gerüste (n-1) oder Stiche (n-1) in Abhängigkeit des vorgenommenen Ist-Soll-Wertvergleiches.In a further preferred method variant, the current value, which is meaningful for the structure, is recorded online during the metalworking process by forming, cooling and / or heat treatment at a specific point, i.e. on the stand (s) or stitch (s) with targeted control of the process parameters for the previous stands (n-1) or stitches (n-1) depending on the actual-target value comparison made.
Es wird beispielsweise die Gefügekorngröße des Metallbandes bzw. Metallbleches vor der Umformung im Gerüst (n) einer Warmbreitbandstraße oder vor der Umformung im Stich (n) einer Grobblechstraße erfasst, beispielsweise mit einem Ultraschallgerät. Bei einer zu großen Abweichung des Istwertes von einem Sollwert erfolgt eine neue Berechnung des Verfahrensmodells, insbesondere des Stichplanmodells, und des Gefügemodells mit Auswirkungen auf die Steuersignale für die Stellglieder der vorherliegenden Gerüste oder die Stellglieder zur Durchführung der vorherigen Stiche, so dass die gewünschte Sollgröße erreicht werden kann. Die Umstellung der vorherigen Gerüste kann schon für das aktuell gewalzte Band oder Blech online erfolgen und/oder für das nachfolgen- de Band oder Blech genutzt werden.For example, the structural grain size of the metal strip or metal sheet is recorded before the forming in the frame (s) of a hot wide strip mill or before the forming in the stitch (s) of a heavy plate mill, for example using an ultrasound device. If the actual value deviates too much from a target value, the process model, in particular the pass schedule model, and the microstructure model are recalculated with effects on the control signals for the actuators of the upstream stands or the actuators for performing the previous stitches, so that the desired target size is achieved can be. The changeover of the previous stands can already be done online for the currently rolled strip or sheet and / or can be used for the subsequent strip or sheet.
Nach einer weiteren bevorzugten Verfahrensvariante erfolgt eine online- Gefügesteuerung in einer Kühlstrecke einer Drahtstraße mit einem Wasserkühlstreckenteil und einem Luftkühlstreckenteil, indem ein aktueller Gefüge- korngrößen-Wert, hier die Austentitkorngröße, des Metalldrahtes nach Durchlaufen der Wasserkühlstrecke mittels einer Ultraschallmesseinrichtung erfasst
und die Temperatur der Gefügeumwandlung sowie der zeitliche Verlauf der Gefügeumwandlung, d.h. der γ-α-Umwandlung, mit in Transportrichtung bewegbaren und/oder unterschiedlich ausrichtbaren Temperaturmesseinrichtungen erfasst wird. Sofern die erfassten Werte von den geplanten Sollwerten abweichen, erfolgt eine neue Berechnung unter Nutzung der Kühlstrecken- und Gefügemodelle sowie online eine entsprechende Einstellung der Stellglieder der Kühlstrecke.According to a further preferred variant of the method, an online microstructure control takes place in a cooling section of a wire mill with a water cooling section and an air cooling section, in that an actual microstructure size value, here the austenite grain size, of the metal wire is detected by means of an ultrasound measuring device after passing through the water cooling section and the temperature of the structural transformation as well as the time course of the structural transformation, ie the γ-α transformation, is recorded with temperature measuring devices that can be moved in the transport direction and / or can be oriented differently. If the recorded values deviate from the planned target values, a new calculation is made using the cooling section and microstructure models, and the actuators of the cooling section are set accordingly online.
Die vorgeschlagene Oniine-Gefügesteuerung bzw. -regelung findet nicht nur Verwendung auf Warmbreitband-, ggf. auch Dünnbrammenwalz-, Grobblech-, Profil-, Stabstahl- und Drahtstraßen, sondern auch bei Kaltband- und Aluminiumstraßen.
The proposed online microstructure control or regulation is not only used on hot wide strip, possibly also thin slab rolling, heavy plate, profile, bar steel and wire mills, but also on cold strip and aluminum mills.
Claims
1. Verfahren zur Prozesssteuerung oder Prozessregelung einer Anlage zur Umformung, Kühlung und/oder Wärmebehandlung von Metall, wobei die Anlage mit Stellgliedern zur Einstellung bestimmter Betriebsparameter ausgerüstet ist und dem Verfahrensprozess ein Verfahrensmodell zugrundeliegt, wobei online mindestens ein aktueller, für das Metallgefüge aussagekräftiger Wert erfasst und in Abhängigkeit dieses Wertes geeignete Pro- zessteuerung- und/oder Prozessregelgrößen zur Einwirkung auf die Stellglieder zur Einstellung gewünschter Gefügeeigenschaften des Metalls ermittelt werden unter Nutzung eines Gefügemodells sowie des dem Prozess zugrundeliegenden Verfahrensmodells.1.Procedure for process control or process regulation of a plant for the forming, cooling and / or heat treatment of metal, the plant being equipped with actuators for setting certain operating parameters and the process being based on a process model, whereby at least one current value, meaningful for the metal structure, is recorded online and depending on this value, suitable process control and / or process control variables for acting on the actuators for setting desired structural properties of the metal are determined using a structural model and the process model on which the process is based.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass in Abhängigkeit des für das Gefüge aussagekräftigen erfassten Wertes eine online Adaption des Verfahrensmodells und/oder des Gefügemodells durchgeführt wird.2. The method according to claim 1, characterized in that an online adaptation of the method model and / or of the microstructure model is carried out as a function of the recorded value meaningful for the microstructure.
3. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass als der für das Gefüge aussagekräftige Wert ein aktueller Gefügekorngrößen-Wert erfasst wird.3. The method according to claim 1, characterized in that a current microstructure size value is recorded as the value meaningful for the microstructure.
4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass als Gefügekorngrößen-Wert die Austenitkorngröße bestimmt wird.4. The method according to claim 3, characterized in that the austenite grain size is determined as the structural grain size value.
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass ein aktueller Gefügekorngrößen-Wert am Ende der Anlage zur Umformung, Kühlung und/oder Wärmebehandlung von Metall erfasst wird.5. The method according to any one of claims 1 to 4, characterized in that a current microstructure size value is recorded at the end of the plant for the forming, cooling and / or heat treatment of metal.
6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass ein aktueller Gefügekorngrößen-Wert während des Prozesses zur6. The method according to any one of claims 1 to 5, characterized in that a current structural grain size value during the process for
Umformung, Kühlung und/oder Wärmebehandlung von Metall erfasst wird und die in Abhängigkeit dieses Wertes ermittelten Prozesssteuerungs- oder Prozessregelunggsgrößen auf die Stellglieder vorherig durchlaufender Prozessschritte zurückwirken.Forming, cooling and / or heat treatment of metal is detected and the process control or process control variables determined as a function of this value have an effect on the actuators of previous process steps.
7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass als der für das Gefüge aussagekräftige Wert ein Gefügeumwandlungs-Zeitpunkt oder das Gefügeumwandlungs-Zeitintervall mittels das Metall berührenden Meßeinrichtungen online erfasst wird.7. The method according to any one of claims 1 to 6, characterized in that a structural transformation time or the structural transformation time interval is recorded online as the value meaningful for the structure by means of measuring devices touching the metal.
8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass als der für das Gefüge aussagekräftige Wert die Umwandlungstem- peratur mittels mindestens einer Erfassungseinheit online erfasst wird, die jeweils längs zur Metallförderrichtung relativ beweglich angeordnet ist und in Abhängigkeit des zu erwartenden Ortes der Gefügeumwandlung, der nach dem Gefügemodell vorhergesagt wird, positioniert wird.8. The method according to any one of claims 1 to 7, characterized in that as the meaningful value for the structure, the transformation temperature is recorded online by means of at least one detection unit, which is arranged relatively movable along the metal conveying direction and depending on the location to be expected the structural transformation that is predicted according to the structural model is positioned.
9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass mittels mehrerer Erfassungseinheiten jeweils der Ort oder das Zeitintervall des Beginns und des Endes der Gefügeumwandlung erfasst wird. 9. The method according to claim 8, characterized in that the location or the time interval of the beginning and the end of the structural change is recorded by means of several recording units.
0. Verfahren nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass eine online-Gefügesteuerung in einer Kühlstrecke einer Drahtstraße mit einer Wasserkühlstreckenteil und einem Luftkühlstreckenteil erfolgt, wobei ein aktueller Gefügekorngrößen-Wert des Metalldrahtes nach Durchlaufen der Wasserkühlstrecke mittels einer Ultraschallmesseinrichtung erfasst wird und wobei die Temperatur einer Gefügeumwandlung sowie der zeitliche Verlauf der Gefügeumwandlung, insbesondere der γ-α- Umwandlung von Stahl, mit in Transportrichtung bewegbaren und/oder unterschiedlich ausrichtbaren Temperaturmesseinrichtungen erfasst wird. 0. The method according to any one of claims 1 to 9, characterized in that an online microstructure control takes place in a cooling section of a wire mill with a water cooling section and an air cooling section, a current microstructure size value of the metal wire being detected by means of an ultrasonic measuring device after passing through the water cooling section and wherein the temperature of a structural transformation and the time course of the structural transformation, in particular the γ-α transformation of steel, are recorded with temperature measuring devices that can be moved in the transport direction and / or can be oriented differently.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10256750A DE10256750A1 (en) | 2002-12-05 | 2002-12-05 | Process control process control system for metal forming, cooling and / or heat treatment |
| DE10256750 | 2002-12-05 | ||
| PCT/EP2003/012918 WO2004050923A1 (en) | 2002-12-05 | 2003-11-19 | Method for process control or process regulation of a unit for moulding, cooling and/or thermal treatment of metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1567681A1 true EP1567681A1 (en) | 2005-08-31 |
Family
ID=32318956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03789055A Withdrawn EP1567681A1 (en) | 2002-12-05 | 2003-11-19 | Method for process control or process regulation of a unit for moulding, cooling and/or thermal treatment of metal |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US20060117549A1 (en) |
| EP (1) | EP1567681A1 (en) |
| JP (1) | JP2006508803A (en) |
| CN (1) | CN100430495C (en) |
| AR (1) | AR042288A1 (en) |
| AU (1) | AU2003293702A1 (en) |
| BR (1) | BR0317039A (en) |
| CA (1) | CA2508594C (en) |
| DE (1) | DE10256750A1 (en) |
| MY (1) | MY139392A (en) |
| RU (1) | RU2336339C2 (en) |
| TW (1) | TWI314070B (en) |
| UA (1) | UA82498C2 (en) |
| WO (1) | WO2004050923A1 (en) |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7617709B2 (en) | 2004-10-14 | 2009-11-17 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Apparatus for controlling materials quality in rolling, forging, or leveling process |
| DE102006047718A1 (en) * | 2006-10-09 | 2008-04-17 | Siemens Ag | Method for tracking the physical condition of a hot plate or hot strip as part of the control of a plate rolling mill for processing a hot plate or hot strip |
| DE102007007560A1 (en) * | 2007-02-15 | 2008-08-21 | Siemens Ag | Method for supporting at least partially manual control of a metalworking line |
| EP2361699A1 (en) * | 2010-02-26 | 2011-08-31 | Siemens Aktiengesellschaft | Method for cooling sheet metal with a cooling section, cooling section and control and/or regulating device for a cooling section |
| CN102632082B (en) * | 2011-02-11 | 2014-03-19 | 宝山钢铁股份有限公司 | Performance prediction model based dynamic control method for mechanical property of hot strip |
| EP2557183A1 (en) * | 2011-08-12 | 2013-02-13 | Siemens Aktiengesellschaft | Method for operating a continuous annealing line for processing a milled item |
| EP2674504A1 (en) * | 2012-06-11 | 2013-12-18 | Siemens S.p.A. | Method and system for thermal treatments of rails |
| AT514380B1 (en) * | 2013-05-03 | 2015-04-15 | Siemens Vai Metals Tech Gmbh | Determination of the ferritic phase content after heating or cooling of a steel strip |
| DE102013225579A1 (en) | 2013-05-22 | 2014-11-27 | Sms Siemag Ag | Device and method for controlling and / or regulating an annealing or heat treatment furnace of a metal material processing line |
| EP2998040A1 (en) | 2014-09-17 | 2016-03-23 | Primetals Technologies Germany GmbH | Width adjustment in a finishing train |
| DE102014222827A1 (en) * | 2014-11-07 | 2016-05-12 | Sms Group Gmbh | Method for controlling and / or regulating a metallurgical plant |
| DE102015108060A1 (en) | 2015-05-21 | 2016-11-24 | Ims Messsysteme Gmbh | Method and device for characterizing a structure of a metal strip or sheet |
| DE102016100811A1 (en) * | 2015-09-25 | 2017-03-30 | Sms Group Gmbh | Method and determination of the structural components in an annealing line |
| EP3358023A4 (en) * | 2015-09-30 | 2019-05-01 | Hitachi Metals, Ltd. | Method for deriving cooling time when quenching steel material, method for quenching steel material, and method for quenching and tempering steel material |
| DE102016222644A1 (en) * | 2016-03-14 | 2017-09-28 | Sms Group Gmbh | Process for rolling and / or heat treating a metallic product |
| TWI628010B (en) * | 2016-04-13 | 2018-07-01 | 中國鋼鐵股份有限公司 | Dynamic adjustment method of rolling steel production process |
| DE102017208576A1 (en) | 2016-05-25 | 2017-11-30 | Sms Group Gmbh | Apparatus and method for determining a microstructure of a metal product and metallurgical plant |
| CN109982805A (en) * | 2016-11-18 | 2019-07-05 | Sms集团有限公司 | For manufacturing the method and equipment of continuous Strip composite material |
| CN112313353A (en) * | 2018-06-21 | 2021-02-02 | 首要金属科技美国有限责任公司 | Method and system for controlling the microstructure of a steel strip in a hot-working apparatus using electromagnetic sensors |
| CN109108094B (en) * | 2018-08-27 | 2019-07-09 | 合肥东方节能科技股份有限公司 | A kind of screw-thread steel fine grain rolling intelligent control method |
| DE102019209163A1 (en) * | 2019-05-07 | 2020-11-12 | Sms Group Gmbh | Process for the heat treatment of a metallic product |
| EP4116456A1 (en) | 2021-07-09 | 2023-01-11 | Matro GmbH | Method and apparatus for galvanizing iron and steel workpieces |
| DE102021121473A1 (en) | 2021-08-18 | 2023-02-23 | Sms Group Gmbh | Transport device, method for operating a transport device and use of a transport device |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU645699B2 (en) * | 1991-06-04 | 1994-01-20 | Nippon Steel Corporation | Method of estimating material of steel product |
| US5702543A (en) * | 1992-12-21 | 1997-12-30 | Palumbo; Gino | Thermomechanical processing of metallic materials |
| CN1094007C (en) * | 1995-06-26 | 2002-11-06 | 艾利森电话股份有限公司 | self-healing network |
| US5804727A (en) * | 1995-09-01 | 1998-09-08 | Sandia Corporation | Measurement of physical characteristics of materials by ultrasonic methods |
| DE19639062A1 (en) * | 1996-09-16 | 1998-03-26 | Mannesmann Ag | Model-based process for the controlled cooling of hot strip or heavy plate in a computer-controlled rolling and cooling process |
| AT408623B (en) * | 1996-10-30 | 2002-01-25 | Voest Alpine Ind Anlagen | METHOD FOR MONITORING AND CONTROLLING THE QUALITY OF ROLLING PRODUCTS FROM HOT ROLLING PROCESSES |
| US6233500B1 (en) * | 1997-06-19 | 2001-05-15 | The United States Of America As Represented By The Secretary Of The Air Force | Optimization and control of microstructure development during hot metal working |
| DE19806267A1 (en) * | 1997-11-10 | 1999-05-20 | Siemens Ag | Method and device for controlling a metallurgical plant |
| DE19963186B4 (en) * | 1999-12-27 | 2005-04-14 | Siemens Ag | Method for controlling and / or regulating the cooling section of a hot strip mill for rolling metal strip and associated device |
| CN1201880C (en) * | 2002-01-11 | 2005-05-18 | 中国科学院金属研究所 | Method for predicting evolvement and performances of structure of strip steels in hot rolled proces |
| ATE307689T1 (en) * | 2002-03-15 | 2005-11-15 | Siemens Ag | COMPUTER-ASSISTED DETERMINATION PROCESS FOR TARGET VALUES FOR PROFILE AND PLANNING ACTUATORS |
-
2002
- 2002-12-05 DE DE10256750A patent/DE10256750A1/en not_active Withdrawn
-
2003
- 2003-11-14 TW TW092131906A patent/TWI314070B/en not_active IP Right Cessation
- 2003-11-19 EP EP03789055A patent/EP1567681A1/en not_active Withdrawn
- 2003-11-19 RU RU2005121275/02A patent/RU2336339C2/en not_active IP Right Cessation
- 2003-11-19 JP JP2004556157A patent/JP2006508803A/en active Pending
- 2003-11-19 US US10/537,521 patent/US20060117549A1/en not_active Abandoned
- 2003-11-19 UA UAA200506570A patent/UA82498C2/en unknown
- 2003-11-19 WO PCT/EP2003/012918 patent/WO2004050923A1/en active Application Filing
- 2003-11-19 CN CNB2003801049458A patent/CN100430495C/en not_active Expired - Fee Related
- 2003-11-19 CA CA2508594A patent/CA2508594C/en not_active Expired - Fee Related
- 2003-11-19 BR BR0317039-0A patent/BR0317039A/en unknown
- 2003-11-19 AU AU2003293702A patent/AU2003293702A1/en not_active Abandoned
- 2003-11-28 MY MYPI20034565A patent/MY139392A/en unknown
- 2003-12-03 AR ARP030104462A patent/AR042288A1/en not_active Application Discontinuation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2004050923A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200413117A (en) | 2004-08-01 |
| CA2508594C (en) | 2013-01-08 |
| WO2004050923A1 (en) | 2004-06-17 |
| BR0317039A (en) | 2005-10-25 |
| CN1720339A (en) | 2006-01-11 |
| TWI314070B (en) | 2009-09-01 |
| CN100430495C (en) | 2008-11-05 |
| CA2508594A1 (en) | 2004-06-17 |
| UA82498C2 (en) | 2008-04-25 |
| AU2003293702A1 (en) | 2004-06-23 |
| RU2005121275A (en) | 2006-02-10 |
| JP2006508803A (en) | 2006-03-16 |
| AR042288A1 (en) | 2005-06-15 |
| US20060117549A1 (en) | 2006-06-08 |
| RU2336339C2 (en) | 2008-10-20 |
| MY139392A (en) | 2009-09-30 |
| DE10256750A1 (en) | 2004-06-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1567681A1 (en) | Method for process control or process regulation of a unit for moulding, cooling and/or thermal treatment of metal | |
| EP1624982B2 (en) | Method for regulating the temperature of a metal strip, especially for rolling a metal hot strip in a finishing train | |
| EP2742158B1 (en) | Method for operating a continuous annealing line for the processing of a rolled good | |
| EP3430175B1 (en) | Method for rolling and/or heat treating a metal strip | |
| AT414316B (en) | METHOD AND DEVICE FOR CONTROLLING A HÜTTENTECHNISCHEN ANLAGE | |
| WO1998018970A1 (en) | Process for monitoring and controlling the quality of rolled products from hot-rolled processes | |
| EP1596999B2 (en) | Method for regulating the temperature of a metal strip, especially in a cooling path | |
| WO2012159866A1 (en) | Control method for a rolling train | |
| EP2697002B1 (en) | Control method for a mill train | |
| WO2017050311A1 (en) | Method for and determination of the microstructural components in an annealing line | |
| WO2013034463A1 (en) | Casting method, more particularly continuous casting method | |
| EP2828011B1 (en) | Thermo-mechanical rolling of an aluminium panel | |
| EP3720623B1 (en) | Stretching-bending-straightening system and method for the actuation thereof | |
| EP3642372A1 (en) | Method for operating an annealing surface | |
| EP3494239B1 (en) | Method for operating an annealing furnace for annealing a metal strip | |
| DE10321791A1 (en) | Process for controlling and/or regulating the temperature of a metal strip, especially in a finishing train, comprises comparing a theoretical temperature gradient with an actual temperature gradient to acquire adjusting signals | |
| DE102015114136B4 (en) | Process for heat treating a metal long product | |
| EP3934822B1 (en) | Method for producing a metallic strip or plate | |
| EP3927478B1 (en) | Method for setting different cooling courses for rolled material over its width in a cooling line of a hot-strip mill or heavy-plate mill | |
| EP4247574A1 (en) | Method for adjusting the properties of a hot-rolled strip having a specific chemical composition in a hot strip mill | |
| EP4247576A1 (en) | Method for processing a transition slab or transition billet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20050429 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
|
| AX | Request for extension of the european patent |
Extension state: AL LT LV MK |
|
| DAX | Request for extension of the european patent (deleted) | ||
| 17Q | First examination report despatched |
Effective date: 20090406 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SMS SIEMAG AG |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
| 18W | Application withdrawn |
Effective date: 20130528 |