EP2689863A1 - Method of influencing the geometry of a milled good in a targeted manner - Google Patents

Method of influencing the geometry of a milled good in a targeted manner Download PDF

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Publication number
EP2689863A1
EP2689863A1 EP12178145.4A EP12178145A EP2689863A1 EP 2689863 A1 EP2689863 A1 EP 2689863A1 EP 12178145 A EP12178145 A EP 12178145A EP 2689863 A1 EP2689863 A1 EP 2689863A1
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EP
European Patent Office
Prior art keywords
control
rolling stock
force
processing units
processing unit
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Withdrawn
Application number
EP12178145.4A
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German (de)
French (fr)
Inventor
Matthias Kurz
Birger Schmidt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
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Siemens AG
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.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP12178145.4A priority Critical patent/EP2689863A1/en
Priority to CN201380039609.3A priority patent/CN104507592B/en
Priority to EP13729694.3A priority patent/EP2864062B1/en
Priority to BR112015001671A priority patent/BR112015001671A2/en
Priority to RU2015103124A priority patent/RU2647417C2/en
Priority to PL13729694T priority patent/PL2864062T3/en
Priority to US14/417,611 priority patent/US9776229B2/en
Priority to PCT/EP2013/062219 priority patent/WO2014016045A1/en
Publication of EP2689863A1 publication Critical patent/EP2689863A1/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/58—Roll-force control; Roll-gap control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/06—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged vertically, e.g. edgers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/14—Guiding, positioning or aligning work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/14—Guiding, positioning or aligning work
    • B21B39/16—Guiding, positioning or aligning work immediately before entering or after leaving the pass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2273/00—Path parameters
    • B21B2273/04—Lateral deviation, meandering, camber of product
    • 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
    • B21B37/68—Camber or steering control for strip, sheets or plates, e.g. preventing meandering

Definitions

  • the invention relates to a method for selectively influencing the geometry of a rolling stock, wherein the rolling stock is transferred from an initial state by rolling by means of a roll stand by means of at least one processing unit in an intermediate or final state.
  • the invention further relates to a control and / or regulating device, a machine-readable program code and a data carrier.
  • hot rolling mills In a rolling mill all the equipment needed for the production of rolled products can be combined. Depending on the type of forming hot and cold rolling mills are differentiated.
  • slabs or ingots, usually called slabs for short, are processed to hot strip.
  • This hot forming is one of the methods that follows the original forming (ingot casting, continuous casting).
  • the rolling stock is heated to temperatures up to 1350 ° C and preferably reduced above its recrystallization temperature in a rolling nip of the rolling mill by pressure to a predetermined thickness.
  • the rolling stock to be rolled in a roughing train has a thickness progression across its width.
  • the aim is usually to produce by means of rolling bands, on the one hand at the end of the finishing line have a substantially symmetrical to the band center thickness across the width, ie are free of wedges, and on the other hand have the least possible bending over the length of the rolling stock, ie are saber-free.
  • a rolling stock is to be rolled, which is already wedge-shaped in the first rolling within the hot rolling line.
  • the wedging of the rolling stock usually results from the casting process and the subsequent cooling and further processing, in particular halving, of the cast slabs.
  • a wedge-shaped rolling stock is to be rolled out into a slab having a substantially rectangular cross-section, the volume flow on the "thicker" side of the slab results in a greater flow of material, in particular longitudinal flow, than on the "thin" side of the slab.
  • the consequence of this different material flow in the longitudinal direction of the rolling stock is the formation of a saber shape or a saber.
  • a saber-shaped rolling stock can lead to difficulties in subsequent processing of the rolling stock.
  • the formation of the saber can be so strong that further processing of the rolling stock is impossible.
  • position-controlled processing units for applying a transverse force are known, for example side guides as in the W02006 / 119984 described or vertical frameworks (so-called Edger) for width control.
  • the invention has for its object to provide an improvement in the geometry of a rolling stock, in particular when processing asymmetric rolling stock.
  • the object is achieved by a method for selectively influencing the geometry of a rolled stock, in particular a Vorbands, wherein the rolling stock is transferred from an initial state by rolling by means of a rolling mill, in particular a roughing stand, by means of at least one processing unit in an intermediate or final state and wherein the at least one processing unit is operated under power control based on a desired force.
  • the invention is based on the recognition that an asymmetrical course of the rolling stock can be counteracted particularly successfully by means of a suitably chosen force with which the processing unit acts on the rolling stock.
  • This force is defined by the desired force, while the desired force is a constant force or alternatively a variable over time force curve.
  • the previously applied position control of the at least one processing unit is unsuitable for the operation of the processing unit. Instead, the processing unit exerts a defined transverse force on the rolling stock through the power regulation, which influences the curvature of the material. This makes it possible that by means of the force control of the at least one processing unit is processed in terms of its thickness and / or width asymmetric rolling, so that the asymmetry is eliminated or at least largely reduced.
  • the force control can also be done with subordinate position control, ie the position is in a second, superimposed Control circuit used to regulate the setpoint force.
  • Such cascade controls are known in the art.
  • one processing unit is force-controlled and the other processing unit is operated position-controlled.
  • the position-controlled processing unit is tracked in such a way the power-controlled processing unit, that a midpoint between the two processing units always remains in a predetermined position. If the desired force to be applied is overestimated, a pure force control can lead to an unwanted distortion of the material of the rolling stock, in which the saber changes its direction. To avoid this, the position-controlled processing unit is moved closer to the rolling stock and absorbs the excessive force of the power-controlled processing unit.
  • the tracking of the position-controlled processing unit is implemented by control technology, by the center between the two processing units is not moved, but in particular always remains in the same place.
  • the midpoint between the two processing units expediently deviates from a center line of the roll stand, but it can also lie on the center line of the roll stand.
  • the center between the processing units and a distance between the processing units are used for the control of the processing units.
  • the center between the processing units is specified and the force control of one of the processing units via the adjustment of the distance between the processing units.
  • This type of force control in which the center and the distance between the two processing units are the control variables, is particularly easy to implement. In particular, since the center remains constant, only the distance between the changed both processing units. If this shifts the force-controlled processing unit, the position-controlled processing unit is tracked to compensate for a possibly much higher target force.
  • the at least one processing unit is initially moved to the rolling stock in a position-controlled manner, and when the desired force is reached by the reaction force acting on the processing unit, the system is switched over to the force control. In the case of two parallel processing units positioned on both sides of the rolling stock, this means that initially the distance between the processing units is reduced in a position-controlled manner. As the processing units move toward one another, the reaction force exerted by the rolling stock on the processing units also increases. If the reaction force acting on the processing unit on the "thin" side of the rolling stock or on the side with the lower material flow, has reached the desired force, then the position control of this processing unit is switched to force control, so that the operations described above are performed ,
  • the wedging and / or saberiness of the rolling stock, in particular in the initial state is measured and on this basis the setpoint force is determined for the force regulation. If the desired force is determined and the center is known, the distance between the processing units is calculated and fed as a control variable to the processing units.
  • the geometry of the rolling stock may change such that the wedge or saber change their side or direction.
  • a change in the position of the wedging and / or the direction of the saberiness of the rolling stock is a change between the force-controlled and the position-controlled Processing unit. This means that when the saber shape changes its direction during the rolling process, the previously force-controlled processing unit is operated position-controlled from the point of inflection and the previously position-controlled processing unit is now operated with force control.
  • control and / or regulating device for selectively influencing the geometry of a rolling stock, with a machine-readable program code containing control commands and / or control commands, the control and / or regulating device for performing the method according to one of cause the above.
  • a machine-readable program code for a control and / or regulating device for selectively influencing the geometry of a rolling stock which contains control commands and / or control commands, the control and / or regulating device for performing the method according to one of cause the above.
  • a horizontal rolling stand 2 in particular a roughing stand, shown, by means of which a rolling stock 4, in particular a pre-strip, is rolled, so that the rolling stock 4 is transferred from an initial state to an intermediate or final state.
  • the rolling stand 2 has a drive side DS and an operating side OS.
  • the rolling mill 2 are also assigned two processing units 6, 8, which are positioned on both sides of the rolling stock 4, as seen from FIG. 2 seen.
  • S the distance between the processing units 6, 8.
  • a center line 10 of the roll stand 2 a center line 12 between the processing units 6, 8, and a center 14 between the processing units 6, 8, which lies on the center line 12 shown.
  • ⁇ s also denotes an offset between the two center lines 10 and 12.
  • the rolling stand 2 is operated in the embodiment shown in particular reversible, so that the rolling stock 4 changes its rolling direction 16 several times during operation.
  • the processing units 6, 8 in the rolling direction 16 downstream of the rolling mill 2.
  • the function of the processing units 6, 8 is to suppress an asymmetrical geometry of the rolled rolled stock 4.
  • one of the processing units 6, 8 in the embodiment of FIG. 2 the processing unit 6) is operated with force control, which is indicated by the desired force signal F.
  • the second processing unit 8 is operated position-controlled, indicated by the position signal P. the control of both processing units 6, 8 assumes a control device 18, the in FIG. 2 is shown symbolically.
  • the force-controlled machining unit 6 counteracts the wedge or the saber shape with a desired force F, which is determined on the basis of the geometry of the rolling stock 4.
  • a desired force F which is determined on the basis of the geometry of the rolling stock 4.
  • FIG. 2 merely contacts the processing unit 6, the rolling stock 4, the second processing unit 8 is moved at a distance from the rolling stock 4.
  • the two processing units 6, 8 are adjusted so that the position-controlled processing unit 8 is tracked to the power-controlled processing unit 6, wherein the offset ⁇ s remains constant.
  • the process or the regulation for reducing the belt curvature predetermined, but too large selected target force F, which can lead to an unwanted longitudinal curvature of the rolling stock 4 compensated.
  • For the processing of the rolling stock is in particular a method for adjusting a specific saberiness according to W02009 / 016086 used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

The method involves transferring rolling stock (4) from an initial state to intermediate or final state by rolling the rolling stock with a roll stand (2) through a processing unit (6), based on the target force (F). The processing units (6,8) are arranged and operated in two sides of the rolling stock for controlling the position and force between processing units. The force between the processing units is corrected by adjusting spacing (S) between processing units, so that center point (14) between processing units is remained in predetermined position. Independent claims are included for the following: (1) a control and/or regulating device; and (2) a program for operating control and/or regulating device for performing targeted influence of geometry of rolling stock.

Description

Die Erfindung betrifft ein Verfahren zur gezielten Beeinflussung der Geometrie eines Walzguts, wobei das Walzgut von einem Anfangszustand durch Walzen mit Hilfe eines Walzgerüsts mittels wenigstens eines Bearbeitungsaggregats in einen Zwischen- oder Endzustand überführt wird. Die Erfindung betrifft weiterhin eine Steuer- und/oder Regeleinrichtung, einen maschinenlesbaren Programmcode sowie einen Datenträger.The invention relates to a method for selectively influencing the geometry of a rolling stock, wherein the rolling stock is transferred from an initial state by rolling by means of a roll stand by means of at least one processing unit in an intermediate or final state. The invention further relates to a control and / or regulating device, a machine-readable program code and a data carrier.

In einem Walzwerk können alle Anlagen zusammengefasst sein, die zur Herstellung von Walzerzeugnissen benötigt werden. Abhängig von der Art der Umformung werden Warm und Kaltwalzwerke unterschieden. In den Warmwalzwerken bzw. Warmbreitbandwalzwerken werden Vorbrammen oder Blöcke, meistens kurz Brammen genannt, zu Warmband verarbeitet. Diese Warmumformung ist eines der Verfahren, das sich dem Urformen (Blockguss, Strangguss) anschließt. Dabei wird das Walzgut auf Temperaturen bis 1.350°C erwärmt und bevorzugt oberhalb dessen Rekristallisationstemperatur in einem Walzspalt des Walzwerks durch Druck auf eine vorgegebene Dicke reduziert. Da das Fertigprodukt (meist Stahl oder Aluminiumband) nur selten in einem Durchgang ausgewalzt werden kann, werden mehrere Walzgerüste zu einer Walzstrasse zusammengefasst, in welcher entsprechend der Anzahl der Gerüstdurchläufe mehrere Walzstiche durchgeführt werden. In Warmwalzwerken unterscheidet man Vorstrasse und Fertigstrasse, wobei in der Vorstrasse die Bramme vorverarbeitet wird, um anschließend in der meist fünf, sechs oder sieben-gerüstigen Fertigstrasse auf ihre Endabmessungen ausgewalzt zu werden.In a rolling mill all the equipment needed for the production of rolled products can be combined. Depending on the type of forming hot and cold rolling mills are differentiated. In the hot rolling mills or hot strip rolling mills, slabs or ingots, usually called slabs for short, are processed to hot strip. This hot forming is one of the methods that follows the original forming (ingot casting, continuous casting). In this case, the rolling stock is heated to temperatures up to 1350 ° C and preferably reduced above its recrystallization temperature in a rolling nip of the rolling mill by pressure to a predetermined thickness. Since the finished product (usually steel or aluminum strip) can rarely be rolled out in one pass, several rolling stands are combined to form a rolling train in which several rolling passes are carried out according to the number of scaffold runs. In hot rolling mills, a distinction is made between roughing and finishing lines, whereby the slab is pre-processed in the roughing mill and then rolled to its final dimensions in the usually five, six or seven-stand finishing train.

Eines der Probleme beim Walzen von Brammen bzw. den daraus entstehenden Bändern ist es, dass das in einer Vorstrasse zu walzende Walzgut einen Dickenverlauf über seine Breite aufweist. Ziel ist es in der Regel, mittels des Walzens Bänder herzustellen, welche einerseits am Ende der Fertigstrasse eine im Wesentlichen symmetrisch zur Bandmitte verlaufende Dicke über die Breite aufweisen, d.h. keilfrei sind, und andererseits eine möglichst geringe Verbiegung über die Länge des Walzgutes aufweisen, d.h. säbelfrei sind.One of the problems with rolling slabs or the strips resulting therefrom is that the rolling stock to be rolled in a roughing train has a thickness progression across its width. The aim is usually to produce by means of rolling bands, on the one hand at the end of the finishing line have a substantially symmetrical to the band center thickness across the width, ie are free of wedges, and on the other hand have the least possible bending over the length of the rolling stock, ie are saber-free.

Dieses zu erreichen ist jedoch schwierig, sofern ein Walzgut zu walzen ist, welches bereits beim ersten Walzen innerhalb der Warmwalzstrasse keilförmig ausgebildet ist. Die Keiligkeit des Walzguts resultiert in der Regel aus dem Gießprozess und der anschließenden Abkühlung und Weiterverarbeitung, insbesondere Halbierung, der gegossenen Brammen. Soll nun ein keilförmiges Walzgut zu einer Bramme mit im Wesentlichen rechteckigem Querschnitt ausgewalzt werden, so kommt es aufgrund der Volumenerhaltung auf der "dicken" Seite der Bramme zu einem stärkeren Materialfluss, insbesondere Längsfluss, als auf der "dünnen" Seite der Bramme. Folge dieses unterschiedlichen Materialflusses in Längsrichtung des Walzgutes ist die Ausbildung einer Säbelform bzw. eines Säbels. Ein säbelförmiges Walzgut kann, abhängig von der Ausprägung des Säbels, zu Schwierigkeiten bei einer nachfolgenden Verarbeitung des Walzguts führen. Die Ausbildung des Säbels kann derart stark sein, dass eine Weiterverarbeitung des Walzgutes unmöglich ist.However, to achieve this is difficult, if a rolling stock is to be rolled, which is already wedge-shaped in the first rolling within the hot rolling line. The wedging of the rolling stock usually results from the casting process and the subsequent cooling and further processing, in particular halving, of the cast slabs. If now a wedge-shaped rolling stock is to be rolled out into a slab having a substantially rectangular cross-section, the volume flow on the "thicker" side of the slab results in a greater flow of material, in particular longitudinal flow, than on the "thin" side of the slab. The consequence of this different material flow in the longitudinal direction of the rolling stock is the formation of a saber shape or a saber. Depending on the shape of the saber, a saber-shaped rolling stock can lead to difficulties in subsequent processing of the rolling stock. The formation of the saber can be so strong that further processing of the rolling stock is impossible.

Zur Behandlung eines Keiles bzw. einer Säbelform eines Walzguts in einer Walzstraße sind verschiedene Methoden bekannt. Diese Methoden beruhen meistens auf einer asymmetrischen Zugverteilung am Walzspalt, wobei eine Kraft quer zur Walzrichtung erzeugt wird.For treating a wedge or a saber shape of a rolling stock in a rolling mill, various methods are known. These methods are usually based on an asymmetric tensile distribution at the nip, wherein a force is generated transversely to the rolling direction.

Weiterhin sind positionsgeregelte Bearbeitungsaggregate zum Aufbringen einer Querkraft bekannt, beispielsweise Seitenführungen wie in der W02006/119984 beschrieben oder vertikale Gerüste (sogenannte Edger) zur Breitensteuerung.Furthermore, position-controlled processing units for applying a transverse force are known, for example side guides as in the W02006 / 119984 described or vertical frameworks (so-called Edger) for width control.

Der Erfindung liegt die Aufgabe zugrunde, eine Verbesserung der Geometrie eines Walzguts, insbesondere bei der Bearbeitung asymmetrischer Walzgüter, zu ermöglichen.The invention has for its object to provide an improvement in the geometry of a rolling stock, in particular when processing asymmetric rolling stock.

Die Aufgabe wird erfindungsgemäß gelöst durch ein Verfahren zur gezielten Beeinflussung der Geometrie eines Walzguts, insbesondere eines Vorbands, wobei das Walzgut von einem Anfangszustand durch Walzen mit Hilfe eines Walzgerüsts, insbesondere eines Vorgerüsts, mittels wenigstens eines Bearbeitungsaggregats in einen Zwischen- oder Endzustand überführt wird und wobei das wenigstens eine Bearbeitungsaggregat auf Grundlage einer Sollkraft kraftgeregelt betrieben wird.The object is achieved by a method for selectively influencing the geometry of a rolled stock, in particular a Vorbands, wherein the rolling stock is transferred from an initial state by rolling by means of a rolling mill, in particular a roughing stand, by means of at least one processing unit in an intermediate or final state and wherein the at least one processing unit is operated under power control based on a desired force.

Unter Bearbeitungsaggregat wird hierbei insbesondere ein Vertikalgerüst (Edger), eine Seitenführung oder eine Querkraftvorrichtung im Sinne der Patentanmeldung "Seitenführung für eine Walzstraße" mit dem Anmeldeaktenzeichen 12168684.4, eingereicht am 21.05.2012, verstanden.Under processing unit here in particular a vertical framework (Edger), a side guide or a transverse force device in the sense of the patent application "side guide for a rolling mill" with the registration file 12168684.4, filed on 21.05.2012, understood.

Die Erfindung beruht auf der Erkenntnis, dass einem asymmetrischen Verlauf des Walzguts mittels einer geeignet gewählten Kraft, mit der das Bearbeitungsaggregat auf das Walzgut wirkt, besonders erfolgreich entgegengewirkt werden kann. Diese Kraft ist durch die Sollkraft definiert, dabei ist die Sollkraft eine konstante Kraft oder alternativ ein über die Zeit veränderlicher Kraftverlauf. Die bisher angewendete Positionsregelung des wenigstens einen Bearbeitungsaggregats ist dabei ungeeignet zum Betrieb des Bearbeitungsaggregats. Stattdessen übt das Bearbeitungsaggregat durch die Kraftreglung eine definierte Querkraft auf das Walzgut aus, die die Krümmung des Materials beeinflusst. Somit wird ermöglicht, dass mittels der Kraftregelung des wenigstens einen Bearbeitungsaggregats ein hinsichtlich seiner Dicke und/oder Breite asymmetrisches Walzgut bearbeitet wird, so dass die Asymmetrie beseitigt oder zumindest größtenteils reduziert wird. Die Kraftregelung kann zudem mit unterlagerten Positionsregelung erfolgen, d.h. die Position wird in einem zweiten, überlagerten Regelkreis verwendet, um die Sollkraft zu regeln. Derartige Kaskadenregelungen sind dem Fachmann bekannt.The invention is based on the recognition that an asymmetrical course of the rolling stock can be counteracted particularly successfully by means of a suitably chosen force with which the processing unit acts on the rolling stock. This force is defined by the desired force, while the desired force is a constant force or alternatively a variable over time force curve. The previously applied position control of the at least one processing unit is unsuitable for the operation of the processing unit. Instead, the processing unit exerts a defined transverse force on the rolling stock through the power regulation, which influences the curvature of the material. This makes it possible that by means of the force control of the at least one processing unit is processed in terms of its thickness and / or width asymmetric rolling, so that the asymmetry is eliminated or at least largely reduced. The force control can also be done with subordinate position control, ie the position is in a second, superimposed Control circuit used to regulate the setpoint force. Such cascade controls are known in the art.

Sind, in einer Walzrichtung betrachtet, beidseitig des Walzguts zwei Bearbeitungsaggregate vorgesehen, so wird vorzugsweise ein Bearbeitungsaggregat kraftgeregelt und das andere Bearbeitungsaggregat positionsgeregelt betrieben. Bevorzugt wird dabei das positionsgeregelte Bearbeitungsaggregat derart dem kraftgeregelten Bearbeitungsaggregat nachgeführt, dass ein Mittelpunkt zwischen den beiden Bearbeitungsaggregaten stets in einer vorgegebenen Position bleibt. Wird die aufzubringende Sollkraft überschätzt, kann es bei einer reinen Kraftkontrolle zu einer ungewollten Verkrümmung des Materials des Walzguts kommen, bei der die Säbeligkeit ihre Richtung ändert. Um dies zu vermeiden, wird das positionsgeregelte Bearbeitungsaggregat näher an das Walzgut verfahren und nimmt die zu hohe Kraft des kraftgeregelten Bearbeitungsaggregats auf. Die Nachführung des positionsgeregelten Bearbeitungsaggregats wird regelungstechnisch umgesetzt, indem der Mittelpunkt zwischen den beiden Bearbeitungsaggregaten nicht verschoben wird, sondern insbesondere stets an der gleichen Stelle bleibt. Der Mittelpunkt zwischen den beiden Bearbeitungsaggregaten weicht dabei zweckdienlicherweise von einer Mittellinie des Walzgerüsts ab, er kann jedoch auch auf der Mittellinie des Walzgerüsts liegen.If, viewed in a rolling direction, two processing units are provided on both sides of the rolling stock, preferably one processing unit is force-controlled and the other processing unit is operated position-controlled. Preferably, the position-controlled processing unit is tracked in such a way the power-controlled processing unit, that a midpoint between the two processing units always remains in a predetermined position. If the desired force to be applied is overestimated, a pure force control can lead to an unwanted distortion of the material of the rolling stock, in which the saber changes its direction. To avoid this, the position-controlled processing unit is moved closer to the rolling stock and absorbs the excessive force of the power-controlled processing unit. The tracking of the position-controlled processing unit is implemented by control technology, by the center between the two processing units is not moved, but in particular always remains in the same place. The midpoint between the two processing units expediently deviates from a center line of the roll stand, but it can also lie on the center line of the roll stand.

Gemäß einer bevorzugten Ausführungsvariante werden für die Regelung der Bearbeitungsaggregate der Mittelpunkt zwischen den Bearbeitungsaggregaten sowie ein Abstand zwischen den Bearbeitungsaggregaten herangezogen. Bevorzugt wird der Mittelpunkt zwischen den Bearbeitungsaggregaten vorgegeben und die Kraftregelung eines der Bearbeitungsaggregate erfolgt über die Einstellung des Abstands zwischen den Bearbeitungsaggregaten. Diese Art der Kraftregelung, bei der der Mittelpunkt und der Abstand zwischen den beiden Bearbeitungsaggregaten die Regelgrößen sind, ist besonders einfach umsetzbar. Da der Mittelpunkt insbesondere konstant bleibt, wird zum Erzeugen der gewünschten Sollkraft lediglich der Abstand zwischen den beiden Bearbeitungsaggregaten verändert. Wenn sich dabei das kraftgeregelte Bearbeitungsaggregat verschiebt, wird das positionsgeregelte Bearbeitungsaggregat nachgeführt, um eine eventuell viel zu hohe Sollkraft zu kompensieren.According to a preferred embodiment, the center between the processing units and a distance between the processing units are used for the control of the processing units. Preferably, the center between the processing units is specified and the force control of one of the processing units via the adjustment of the distance between the processing units. This type of force control, in which the center and the distance between the two processing units are the control variables, is particularly easy to implement. In particular, since the center remains constant, only the distance between the changed both processing units. If this shifts the force-controlled processing unit, the position-controlled processing unit is tracked to compensate for a possibly much higher target force.

Wenn sich noch kein Material im Bereich des Bearbeitungsaggregats befindet, kann auch die Kraftregelung nicht durchgeführt werden. Daher wird bevorzugt das wenigstens eine Bearbeitungsaggregat zunächst positionsgeregelt an das Walzgut herangefahren und beim Erreichen der Sollkraft durch die auf das Bearbeitungsaggregat wirkende Reaktionskraft wird auf die Kraftregelung umgeschaltet. Bei zwei parallelen, beidseitig des Walzguts positionierten Bearbeitungsaggregaten bedeutet dies, dass zunächst der Abstand zwischen den Bearbeitungsaggregate positionsgeregelt verkleinert wird. Beim Verfahren der Bearbeitungsaggregate aufeinander zu wächst auch die Reaktionskraft, die das Walzgut auf die Bearbeitungsaggregate ausübt. Wenn die Reaktionskraft, die auf das Bearbeitungsaggregat auf der "dünnen" Seite des Walzguts bzw. auf der Seite mit dem geringeren Materialfluss wirkt, die Sollkraft erreicht hat, dann wird die Positionsregelung dieses Bearbeitungsaggregates auf Kraftregelung umgeschaltet, so dass die oben beschriebenen Vorgänge durchgeführt werden.If there is still no material in the area of the processing unit, the force control can not be performed. Therefore, it is preferred that the at least one processing unit is initially moved to the rolling stock in a position-controlled manner, and when the desired force is reached by the reaction force acting on the processing unit, the system is switched over to the force control. In the case of two parallel processing units positioned on both sides of the rolling stock, this means that initially the distance between the processing units is reduced in a position-controlled manner. As the processing units move toward one another, the reaction force exerted by the rolling stock on the processing units also increases. If the reaction force acting on the processing unit on the "thin" side of the rolling stock or on the side with the lower material flow, has reached the desired force, then the position control of this processing unit is switched to force control, so that the operations described above are performed ,

Nach einer bevorzugten Ausführung wird die Keiligkeit und/oder die Säbeligkeit des Walzguts, insbesondere im Anfangszustand, gemessen und auf dieser Grundlage wird die Sollkraft für die Kraftregelung bestimmt. Wenn die Sollkraft bestimmt ist und der Mittelpunkt bekannt ist, wird der Abstand zwischen den Bearbeitungsaggregaten berechnet und als Regelgröße den Bearbeitungsaggregaten zugeführt.According to a preferred embodiment, the wedging and / or saberiness of the rolling stock, in particular in the initial state, is measured and on this basis the setpoint force is determined for the force regulation. If the desired force is determined and the center is known, the distance between the processing units is calculated and fed as a control variable to the processing units.

Im Laufe des Walzvorgangs kann sich die Geometrie des Walzguts derart ändern, dass der Keil oder die Säbeligkeit ihre Seite bzw. Richtung ändern. Vorteilhafterweise erfolgt bei einer derartigen Änderung der Position der Keiligkeit und/oder der Richtung der Säbeligkeit des Walzguts ein Wechsel zwischen dem kraftgeregelten und dem positionsgeregelten Bearbeitungsaggregat. Dies bedeutet, dass wenn die Säbelform während des Walzvorgangs ihre Richtung wechselt, das zuvor kraftgeregelte Bearbeitungsaggregat ab dem Wendepunkt positionsgeregelt betrieben wird und das zuvor positionsgeregelte Bearbeitungsaggregat nun kraftgeregelt betrieben wird.During the rolling process, the geometry of the rolling stock may change such that the wedge or saber change their side or direction. Advantageously, in such a change in the position of the wedging and / or the direction of the saberiness of the rolling stock is a change between the force-controlled and the position-controlled Processing unit. This means that when the saber shape changes its direction during the rolling process, the previously force-controlled processing unit is operated position-controlled from the point of inflection and the previously position-controlled processing unit is now operated with force control.

Die Aufgabe wird weiterhin erfindungsgemäß gelöst durch eine Steuer- und/oder Regeleinrichtung zur gezielten Beeinflussung der Geometrie eines Walzguts, mit einem maschinenlesbaren Programmcode, welcher Steuerbefehle und/oder Regelbefehle enthält, die die Steuer- und/oder Regeleinrichtung zur Durchführung des Verfahrens nach einer der obigen Ausführungen veranlassen.The object is further achieved by a control and / or regulating device for selectively influencing the geometry of a rolling stock, with a machine-readable program code containing control commands and / or control commands, the control and / or regulating device for performing the method according to one of cause the above.

Die Aufgabe wird darüber hinaus erfindungsgemäß gelöst durch einen maschinenlesbaren Programmcode für eine Steuer-und/oder Regeleinrichtung zur gezielten Beeinflussung der Geometrie eines Walzguts, welcher Steuerbefehle und/oder Regelbefehle enthält, die die Steuer- und/oder Regeleinrichtung zur Durchführung des Verfahrens nach einer der obigen Ausführungen veranlassen.The object is also achieved according to the invention by a machine-readable program code for a control and / or regulating device for selectively influencing the geometry of a rolling stock, which contains control commands and / or control commands, the control and / or regulating device for performing the method according to one of cause the above.

Schließlich wird die Aufgabe erfindungsgemäß gelöst durch einen Datenträger mit einem darauf gespeicherten derartigen maschinenlesbaren Programmcode.Finally, the object is achieved by a data carrier with a stored thereon such machine-readable program code.

Ein Ausführungsbeispiel der Erfindung wird anhand einer Zeichnung näher erläutert. Hierin zeigen schematisch und stark vereinfacht:

FIG 1
eine erste Draufsicht auf ein Walzgerüst mit zwei seitlichen Bearbeitungsaggregaten, und
FIG 2
eine zweite Draufsicht auf ein Walzgerüst mit zwei seitlichen Bearbeitungsaggregaten
An embodiment of the invention will be explained in more detail with reference to a drawing. Herein schematically and greatly simplified show:
FIG. 1
a first plan view of a rolling mill with two lateral processing units, and
FIG. 2
a second plan view of a rolling mill with two lateral processing units

Gleiche Bezugszeichen haben in den verschiedenen Figuren die gleiche Bedeutung.Like reference numerals have the same meaning in the various figures.

In FIG 1 und FIG 2 ist ein horizontales Walzgerüst 2, insbesondere ein Vorgerüst, gezeigt, mit dessen Hilfe ein Walzgut 4, insbesondere ein Vorband, gewalzt wird, so dass das Walzgut 4 von einem Anfangszustand in einen Zwischen- oder Endzustand überführt wird. Das Walzgerüst 2 weist eine Antriebsseite DS und eine Bedienseite OS auf.In 1 and FIG. 2 a horizontal rolling stand 2, in particular a roughing stand, shown, by means of which a rolling stock 4, in particular a pre-strip, is rolled, so that the rolling stock 4 is transferred from an initial state to an intermediate or final state. The rolling stand 2 has a drive side DS and an operating side OS.

Dem Walzgerüst 2 sind zudem zwei Bearbeitungsaggregate 6, 8 zugeordnet, die beidseitig dem Walzgut 4 positioniert sind, wie aus FIG 2 ersichtlich. In FIG 1 wird mit S der Abstand zwischen den Bearbeitungsaggregaten 6, 8 bezeichnet. In FIG 1 sind zudem eine Mittellinie 10 des Walzgerüsts 2, eine Mittellinie 12 zwischen den Bearbeitungsaggregaten 6, 8, sowie ein Mittelpunkt 14 zwischen den Bearbeitungsaggregaten 6, 8, der auf der Mittellinie 12 liegt, gezeigt. Mit Δs wird zudem ein Offset zwischen den beiden Mittellinien 10 und 12 bezeichnet.The rolling mill 2 are also assigned two processing units 6, 8, which are positioned on both sides of the rolling stock 4, as seen from FIG. 2 seen. In FIG. 1 is denoted by S the distance between the processing units 6, 8. In FIG. 1 In addition, a center line 10 of the roll stand 2, a center line 12 between the processing units 6, 8, and a center 14 between the processing units 6, 8, which lies on the center line 12 shown. Δs also denotes an offset between the two center lines 10 and 12.

Das Walzgerüst 2 wird im gezeigten Ausführungsbeispiel insbesondere reversibel betrieben, so dass das Walzgut 4 im Betrieb seine Walzrichtung 16 mehrmals ändert.The rolling stand 2 is operated in the embodiment shown in particular reversible, so that the rolling stock 4 changes its rolling direction 16 several times during operation.

In der in FIG 2 gezeigten Situation sind die Bearbeitungsaggregate 6, 8 in Walzrichtung 16 dem Walzgerüst 2 nachgeordnet. Die Funktion der Bearbeitungsaggregate 6, 8 ist, eine asymmetrische Geometrie des gewalzten Walzguts 4 zu unterdrücken. Hierfür ist vorgesehen, dass bei der Detektion einer Keiligkeit und/oder einer Säbeligkeit des Walzguts 4 eines der Bearbeitungsaggregate 6, 8 (im Ausführungsbeispiel gemäß FIG 2 das Bearbeitungsaggregat 6) kraftgeregelt betrieben wird, was durch das Sollkraft-Signal F angedeutet ist. Gleichzeitig wird das zweite Bearbeitungsaggregat 8 positionsgeregelt betrieben, angedeutet durch das Positionssignal P. die Regelung beider Bearbeitungsaggregate 6, 8 übernimmt eine Regeleinrichtung 18, die in FIG 2 symbolisch dargestellt ist.In the in FIG. 2 shown situation, the processing units 6, 8 in the rolling direction 16 downstream of the rolling mill 2. The function of the processing units 6, 8 is to suppress an asymmetrical geometry of the rolled rolled stock 4. For this purpose, it is provided that in the detection of a wedging and / or saberiness of the rolling stock 4 one of the processing units 6, 8 (in the embodiment of FIG FIG. 2 the processing unit 6) is operated with force control, which is indicated by the desired force signal F. At the same time the second processing unit 8 is operated position-controlled, indicated by the position signal P. the control of both processing units 6, 8 assumes a control device 18, the in FIG. 2 is shown symbolically.

Das kraftgeregelte Bearbeitungsaggregat 6 wirkt mit einer Sollkraft F, welche auf Grundlage der Geometrie des Walzguts 4 bestimmt wird, dem Keil bzw. der Säbelform entgegen. In FIG 2 kontaktiert lediglich das Bearbeitungsaggregat 6 das Walzgut 4, das zweite Bearbeitungsaggregat 8 ist auf Abstand zum Walzgut 4 verfahren.The force-controlled machining unit 6 counteracts the wedge or the saber shape with a desired force F, which is determined on the basis of the geometry of the rolling stock 4. In FIG. 2 merely contacts the processing unit 6, the rolling stock 4, the second processing unit 8 is moved at a distance from the rolling stock 4.

Vorteilhafterweise werden die beiden Bearbeitungsaggregate 6, 8 jedoch so eingestellt, dass das positionsgeregelte Bearbeitungsaggregat 8 dem kraftgeregelten Bearbeitungsaggregat 6 nachgeführt wird, wobei der Offset Δs konstant bleibt. Auf diese Weise wird eine dem Verfahren bzw. der Regelung zur Reduzierung der Bandkrümmung vorgegeben, aber zu groß gewählte Sollkraft F, die zu einer ungewollten Längskrümmung des Walzguts 4 führen kann, kompensiert. Für die regelungstechnische Umsetzung bedeutet dies, dass der Mittelpunkt 14 vorgegeben wird und lediglich der S Abstand zwischen den Bearbeitungsaggregaten 6, 8 verändert wird, um die Sollkraft F zu erreichen und zu erhalten, solange notwendig ist. Für die Verarbeitung des Walzguts wird dabei insbesondere ein Verfahren zur Einstellung einer bestimmten Säbeligkeit gemäß W02009/016086 eingesetzt.Advantageously, however, the two processing units 6, 8 are adjusted so that the position-controlled processing unit 8 is tracked to the power-controlled processing unit 6, wherein the offset Δs remains constant. In this way, the process or the regulation for reducing the belt curvature predetermined, but too large selected target force F, which can lead to an unwanted longitudinal curvature of the rolling stock 4, compensated. For the control technical implementation, this means that the center 14 is specified and only the S distance between the processing units 6, 8 is changed in order to achieve the desired force F and to obtain as long as is necessary. For the processing of the rolling stock is in particular a method for adjusting a specific saberiness according to W02009 / 016086 used.

Claims (12)

Verfahren zur gezielten Beeinflussung der Geometrie eines Walzguts (4), wobei das Walzgut (4) von einem Anfangszustand durch Walzen mit Hilfe eines Walzgerüsts (2) mittels wenigstens eines Bearbeitungsaggregats (6) in einen Zwischen- oder Endzustand überführt wird,
dadurch gekennzeichnet, dass das wenigstens eine Bearbeitungsaggregat (6) auf Grundlage einer Sollkraft (F) kraftgeregelt betrieben wird.Method for selectively influencing the geometry of a rolling stock (4), wherein the rolling stock (4) is transferred from an initial state by means of rolling with the aid of a rolling stand (2) by means of at least one processing unit (6) into an intermediate or final state,
characterized in that the at least one processing unit (6) on the basis of a desired force (F) is operated under power control. Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass beidseitig des Walzguts (4) zwei Bearbeitungsaggregate (6, 8) vorgesehen sind, wobei ein Bearbeitungsaggregat (6) kraftgeregelt und das andere Bearbeitungsaggregat (8) positionsgeregelt betrieben wird.Method according to claim 1,
characterized in that on both sides of the rolling stock (4) has two processing units (6, 8) are provided, wherein a processing unit (6) force-controlled and the other processing unit (8) is operated position-controlled. Verfahren nach Anspruch 2,
dadurch gekennzeichnet, dass das positionsgeregelte Bearbeitungsaggregat (8) derart dem kraftgeregelten Bearbeitungsaggregat nachgeführt wird, dass ein Mittelpunkt (14) zwischen den beiden Bearbeitungsaggregaten (6, 8) stets in einer vorgegebenen Position bleibt.Method according to claim 2,
characterized in that the position-controlled processing unit (8) is tracked in such a way the power-controlled processing unit that a center (14) between the two processing units (6, 8) always remains in a predetermined position. Verfahren nach Anspruch 3,
dadurch gekennzeichnet, dass für die Regelung der Bearbeitungsaggregate (6, 8) der Mittelpunkt (14) zwischen den Bearbeitungsaggregaten (6, 8) sowie ein Abstand (S) zwischen den Bearbeitungsaggregaten (6, 8) herangezogen werden.Method according to claim 3,
characterized in that for the control of the processing units (6, 8) of the center (14) between the processing units (6, 8) and a distance (S) between the processing units (6, 8) are used. Verfahren nach Anspruch 4,
dadurch gekennzeichnet, dass der Mittelpunkt (14) zwischen den Bearbeitungsaggregaten (6, 8) vorgegeben wird und die Kraftregelung eines der Bearbeitungsaggregate (6) über die Einstellung des Abstands (S) zwischen den Bearbeitungsaggregaten (6, 8) erfolgt.Method according to claim 4,
characterized in that the center (14) between the processing units (6, 8) is specified and the force control of one of the processing units (6) via the adjustment of the distance (S) between the processing units (6, 8). Verfahren nach einem der Ansprüche 3 bis 5,
dadurch gekennzeichnet, dass der Mittelpunkt (14) von einer Mittellinie (10) des Walzgerüsts (2) abweicht.Method according to one of claims 3 to 5,
characterized in that the center (14) deviates from a center line (10) of the roll stand (2). Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass das wenigstens eine Bearbeitungsaggregat (6) zunächst positionsgeregelt an das Walzgut (4) herangefahren wird und beim Erreichen der Sollkraft (K) durch die auf das Bearbeitungsaggregat wirkende Reaktionskraft auf die Kraftregelung umgeschaltet wird.Method according to one of the preceding claims,
characterized in that the at least one processing unit (6) is initially moved position-controlled to the rolling stock (4) and on reaching the desired force (K) is switched by acting on the processing unit reaction force to the force control. Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass eine Keiligkeit und/oder eine Säbeligkeit des Walzguts (4) gemessen wird und auf dieser Grundlage die Sollkraft (F) für die Kraftregelung bestimmt wird.Method according to one of the preceding claims,
characterized in that a wedging and / or a siltiness of the rolling stock (4) is measured and on this basis, the desired force (F) is determined for the force control. Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass bei Änderung der Position der Keiligkeit und/oder der Richtung der Säbeligkeit des Walzguts (4) ein Wechsel zwischen dem kraftgeregelten und dem positionsgeregelten Bearbeitungsaggregat (6, 8) erfolgt.Method according to one of the preceding claims,
characterized in that when changing the position of the wedging and / or the direction of the saberity of the rolling stock (4), a change between the force-controlled and the position-controlled processing unit (6, 8) takes place. Steuer- und/oder Regeleinrichtung (18) zur gezielten Beeinflussung der Geometrie eines Walzguts (4), mit einem maschinenlesbaren Programmcode, welcher Steuerbefehle und/oder Regelbefehle enthält, die die Steuer- und/oder Regeleinrichtung (18) zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 9 veranlassen.Control and / or regulating device (18) for selectively influencing the geometry of a rolling stock (4), with a machine-readable program code containing control commands and / or control commands, which the control and / or regulating device (18) for performing the method after a of the claims 1 to 9 cause. Maschinenlesbarer Programmcode für eine Steuer- und/oder Regeleinrichtung (18) zur gezielten Beeinflussung der Geometrie eines Walzguts, welcher Steuerbefehle und/oder Regelbefehle enthält, die die Steuer- und/oder Regeleinrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 9 veranlassen.Machine-readable program code for a control and / or regulating device (18) for selectively influencing the geometry of a rolling stock which contains control commands and / or control commands which cause the control and / or regulating device to carry out the method according to one of claims 1 to 9. Datenträger mit einem darauf gespeicherten maschinenlesbaren Programmcode gemäß Anspruch 11.Data carrier with a machine-readable program code stored thereon according to claim 11.
EP12178145.4A 2012-07-27 2012-07-27 Method of influencing the geometry of a milled good in a targeted manner Withdrawn EP2689863A1 (en)

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EP12178145.4A EP2689863A1 (en) 2012-07-27 2012-07-27 Method of influencing the geometry of a milled good in a targeted manner
CN201380039609.3A CN104507592B (en) 2012-07-27 2013-06-13 For the method affecting the geometry of rolled piece targetedly
EP13729694.3A EP2864062B1 (en) 2012-07-27 2013-06-13 Method of influencing the geometry of a milled good in a targeted manner
BR112015001671A BR112015001671A2 (en) 2012-07-27 2013-06-13 method for influencing laminate item geometry in a controlled manner, control device for influencing the geometry of a laminate item, machine readable program code for a control device and data medium
RU2015103124A RU2647417C2 (en) 2012-07-27 2013-06-13 Method of managing influence on geometry of rolled material and control device for this purpose
PL13729694T PL2864062T3 (en) 2012-07-27 2013-06-13 Method of influencing the geometry of a milled good in a targeted manner
US14/417,611 US9776229B2 (en) 2012-07-27 2013-06-13 Method for influencing the geometry of a rolled item in a controlled manner
PCT/EP2013/062219 WO2014016045A1 (en) 2012-07-27 2013-06-13 Method for influencing the geometry of a rolled item in a controlled manner

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US9776229B2 (en) 2017-10-03
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RU2647417C2 (en) 2018-03-15
CN104507592B (en) 2016-08-24
EP2864062A1 (en) 2015-04-29
BR112015001671A2 (en) 2017-07-04
WO2014016045A1 (en) 2014-01-30
US20150231679A1 (en) 2015-08-20
EP2864062B1 (en) 2016-09-28

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