EP2598264B1 - Roller table of a rolling train - Google Patents

Roller table of a rolling train Download PDF

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Publication number
EP2598264B1
EP2598264B1 EP11733626.3A EP11733626A EP2598264B1 EP 2598264 B1 EP2598264 B1 EP 2598264B1 EP 11733626 A EP11733626 A EP 11733626A EP 2598264 B1 EP2598264 B1 EP 2598264B1
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Prior art keywords
roller table
converter
segment
rolling
sub
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EP11733626.3A
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German (de)
French (fr)
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EP2598264A1 (en
Inventor
Jürgen RUPP
Martin Bischoff
Birger Schmidt
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Siemens AG
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Siemens AG
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    • 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
    • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
    • B21B39/12—Arrangement or installation of roller tables in relation to a roll stand
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/06—Thermomechanical rolling

Definitions

  • the invention relates to a roller table for transporting a rolling stock in a rolling train, wherein the roller table has at least two drive segments operated by converters.
  • the invention relates to a method for operating the roller table.
  • the rolling stock e.g. Metal slabs transported on rollers between individual processing stations. Depending on the material, temperature and Walzgutdicke the rolling is rolled different times. Individual rolling stands are run through several times. The transport of a rolling stand, the reversal of direction and the return transport to the mill stand done on both sides of the rolling mill arranged roller tables.
  • roller tables are divided into individual segments, which are controlled separately. Starting and transporting the rolling stock from one segment to the next must be smooth. Therefore, the use of converters is essential.
  • each roller table segment is controlled separately via an inverter in rolling mills.
  • the more roller table segments that comprise a rolling train the more flexible this rolling line is in terms of the distances of the processed rolled materials.
  • many roller table segments also mean many converters with the associated acquisition costs. Thus, a must Rolling mill operators always find a compromise between investment costs and the highest possible flexibility of the roller table operation to maximize throughput.
  • a roller conveyor with several sub-segments.
  • Each of these sub-segments has rollers, each driven by motors.
  • Several motors are controlled by a respective roller control device.
  • the role controllers in turn, contain speed instructions from controllers.
  • Inverters for controlling drives are also known from other technical fields. Thus, for example, reveals EP 1 906 518 A2 a parallel connection of converters for high power drives, such as ships or wind power plants.
  • the invention has for its object to provide an improvement over the prior art for a roller table of the type mentioned.
  • the roller table for transporting a rolling stock in a rolling train on at least two driven via inverter drive segments wherein at least a sub-segment of the roller table by means of a switching unit to a first inverter and / or a second inverter is switchable.
  • a flexibilization of the rolling train is effected in comparison to known solutions with a constant number of converters.
  • Individual roller table segments can be flexibly shortened and extended as required.
  • the stacking density of the rolling materials can be increased by this variable roller table segmentation. This significantly improves the throughput of the rolling train.
  • variable inverter assignment of the subsegment leads to a better utilization of the inverters.
  • fewer total inverters are required to achieve the desired functionality.
  • Another advantage is a reduction in electricity costs, because currently not required roller table motors by the flexible interconnection either secondarily with operated at a lower speed or placed in a standby mode.
  • a redundancy of the drive supply is achieved at least for the subsegment. If one inverter fails, emergency operation can be maintained with the other inverter.
  • one segment of the roller table is permanently assigned to each inverter in addition to the switchable sub-segment. This facilitates the design of the inverter with upright flexibility of the roller table.
  • the switching unit comprises a plurality of contactors, by means of which the sub-segment can be switched to an inverter output.
  • the contactors are easy to control and allow safe switching of the inverter.
  • the contactors are designed as vacuum contactors, which allow more switching operations than ordinary circuit breakers.
  • the inventive method provides that during a rolling mill operation, a sub-segment of the roller table is separated by means of switching unit of a converter and / or connected to another inverter. It is advantageous if continuously the position of a rolling stock is detected and depending on a switching of the subsegment takes place from one inverter to the other inverter. This allows a particularly smooth onward transport of the rolling stock from one roller table segment to the next.
  • the illustration comprises a rolling stand 4 with rollers 1, 1 'arranged on both sides.
  • a first rolling stock 5 leaves the rolling stand 4 and is transported further by means of roller table 1.
  • On this roller table 1 is already another rolling 5 ', which has already passed the rolling stand 4 and optionally cooled.
  • roller table 1 On the other side of the roll stand 4, the same features.
  • the considered roller table 1 has a plurality of rollers.
  • a first roller table segment a is assigned to a first converter 2a fixed.
  • the corresponding roller drives are directly connected to the output of the first converter 2a.
  • a second roller table segment b is permanently assigned to a second converter 2b. Behind this roller table segment b, the roller table 1 has more roles, the drive power supply is not shown.
  • a sub-segment c is arranged, which is variably assigned via a switching unit 3 the two inverters 2a, 2b. Both the inverters 2a, 2b and the switching unit 3 are connected to a controller STR.
  • the sub-segment c is driven by means of switching unit 3 via no converter 2a, 2b, via only one converter 2a or 2b, or via both converters 2a and 2b. In the latter case, the inverters 2a, 2b must be set up to support a parallel operation. While the first rolling stock 5 is being transported out of the rolling stand 4, for example, the sub-segment c of the roller table remains associated with the second converter 2b.
  • the sub-segment c is again available for transporting the second rolling stock 5 'and switched to the second inverter 2b.
  • Frequency inverters with switchable parameter sets are preferably used as converters 2a, 2b. Such frequency converters are designed to support variable output loads.
  • control STR When switching the subsegment c from one inverter 2a or 2b to the other inverter 2b or 2a then takes place by means of control STR a corresponding change in the parameter sets used.
  • the outputs of the converters 2a, 2b are connected via contactors, which are arranged in the switching unit 3, with the drive units of the rollers of the variable sub-segment c. Vacuum contactors allow high switching cycles and therefore an almost unlimited switching sequence between the two converters 2a, 2b.
  • the converters 2a, 2b do not allow parallel operation, it makes sense to set up the actuation of the contactors in such a way that only one inverter 2a or 2b can necessarily be connected to the motors of the variable partial segment c. For example, this is realized by means of a suitable blocking circuit.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Control Of Conveyors (AREA)
  • Control Of Multiple Motors (AREA)

Description

Die Erfindung betrifft einen Rollgang zum Transport eines Walzguts in einer Walzstraße, wobei der Rollgang zumindest zwei über Umrichter betriebene Antriebssegmente aufweist. Zudem bezieht sich die Erfindung auf ein Verfahren zum Betreiben des Rollgangs.The invention relates to a roller table for transporting a rolling stock in a rolling train, wherein the roller table has at least two drive segments operated by converters. In addition, the invention relates to a method for operating the roller table.

In Walzstraßen wird das Walzgut wie z.B. Metall-Brammen auf Rollgängen zwischen einzelnen Weiterverarbeitungsstationen transportiert. Je nach Material, Temperatur und Walzgutdicke wird das Walzgut unterschiedlich oft gewalzt. Einzelne Walzgerüste werden dabei mehrmals durchlaufen. Der Transport von einem Walzgerüst, die Richtungsumkehr und der Rücktransport zum Walzgerüst erfolgen auf beidseits des Walzgerüsts angeordneten Rollgängen.In rolling mills, the rolling stock, e.g. Metal slabs transported on rollers between individual processing stations. Depending on the material, temperature and Walzgutdicke the rolling is rolled different times. Individual rolling stands are run through several times. The transport of a rolling stand, the reversal of direction and the return transport to the mill stand done on both sides of the rolling mill arranged roller tables.

Oftmals werden pro Walzdurchlauf beispielsweise mehrere Brammen gewalzt, um einen höheren Durchsatz zu erreichen. Andere Brammen sind derweilen auf einem Rollgangabschnitt bis zum nächsten Walzprozessschritt zwischengelagert. Um einen solchen Ablauf zu ermöglichen, werden Rollgänge in einzelne Segmente unterteilt, die separat ansteuerbar sind. Das Anfahren sowie der Transport des Walzguts von einem Segment zum nächsten müssen sanft verlaufen. Daher ist der Einsatz von Umrichtern unerlässlich.Often, for example, several slabs are rolled per rolling pass in order to achieve a higher throughput. Other slabs are meantime stored on a roller table section until the next rolling process step. To allow such a process, roller tables are divided into individual segments, which are controlled separately. Starting and transporting the rolling stock from one segment to the next must be smooth. Therefore, the use of converters is essential.

Nach dem Stand der Technik wird in Walzstraßen, unabhängig von der Anzahl an Rollgangsegmenten und der Auslegung des Rollgangs, jedes Rollgangsegment separat über einen Umrichter angesteuert. Je mehr Rollgangsegmente eine Walzstraße umfasst, umso flexibler ist diese Walzstraße hinsichtlich der Abstände der bearbeiteten Walzmaterialien. Viele Rollgangsegmente bedeuten jedoch auch viele Umrichter mit den damit verbundenen Anschaffungskosten. Somit muss ein Walzstraßenbetreiber immer einen Kompromiss zwischen Investitionskosten und möglichst hoher Flexibilität des Rollgangbetriebs zur Durchsatzmaximierung finden.According to the prior art, regardless of the number of roller table segments and the design of the roller table, each roller table segment is controlled separately via an inverter in rolling mills. The more roller table segments that comprise a rolling train, the more flexible this rolling line is in terms of the distances of the processed rolled materials. However, many roller table segments also mean many converters with the associated acquisition costs. Thus, a must Rolling mill operators always find a compromise between investment costs and the highest possible flexibility of the roller table operation to maximize throughput.

Beispielsweise kennt man aus der JP 57 094415 A einen Rollengang mit mehreren Teilsegmenten. Jedes dieser Teilsegmente weist Rollen auf, die jeweils von Motoren angetrieben sind. Dabei werden mehrere Motoren durch je eine Rollen-Kontrolleinrichtung gesteuert. Die Rollen-Kontrolleinrichtungen wiederum enthalten Geschwindigkeitsanweisungen von Steuereinrichtungen.For example, one knows from the JP 57 094415 A a roller conveyor with several sub-segments. Each of these sub-segments has rollers, each driven by motors. Several motors are controlled by a respective roller control device. The role controllers, in turn, contain speed instructions from controllers.

Auch aus anderen technischen Gebieten sind Umrichter zur Ansteuerung von Antrieben bekannt. So offenbart etwa die EP 1 906 518 A2 eine Parallelschaltung von Umrichtern für Antriebe mit großer Leistung, wie bei Schiffen oder Windkraftwerken.Inverters for controlling drives are also known from other technical fields. Thus, for example, reveals EP 1 906 518 A2 a parallel connection of converters for high power drives, such as ships or wind power plants.

Der Erfindung liegt die Aufgabe zugrunde, für einen Rollgang der eingangs genannten Art eine Verbesserung gegenüber dem Stand der Technik anzugeben.The invention has for its object to provide an improvement over the prior art for a roller table of the type mentioned.

Erfindungsgemäß wird diese Aufgabe gelöst durch einen Rollgang gemäß Anspruch 1 und durch ein Verfahren gemäß Anspruch 6. Vorteilhafte Ausprägungen finden sich in den abhängigen Ansprüchen.According to the invention this object is achieved by a roller table according to claim 1 and by a method according to claim 6. Advantageous developments can be found in the dependent claims.

Dabei weist der Rollgang zum Transport eines Walzguts in einer Walzstraße zumindest zwei über Umrichter betriebene Antriebssegmente auf, wobei zumindest ein Teilsegment des Rollgangs mittels einer Umschalteinheit an einen ersten Umrichter und/oder einen zweiten Umrichter schaltbar ist. Dadurch wird gegenüber bekannten Lösungen bei gleichbleibender Anzahl an Umrichtern eine Flexibilisierung der Walzstraße bewirkt. Einzelne Rollgangsegmente sind nach Bedarf flexibel verkürz- und verlängerbar. Insbesondere beim thermomechanischen Walzen mit Kühlphasen des Walzguts zwischen einzelnen Walzsequenzen kann durch diese variable Rollgangsegmentierung die Stapeldichte der Walzmaterialen erhöht werden. Das verbessert deutlich den Durchsatz der Walzstraße.In this case, the roller table for transporting a rolling stock in a rolling train on at least two driven via inverter drive segments, wherein at least a sub-segment of the roller table by means of a switching unit to a first inverter and / or a second inverter is switchable. As a result, a flexibilization of the rolling train is effected in comparison to known solutions with a constant number of converters. Individual roller table segments can be flexibly shortened and extended as required. Especially during thermomechanical rolling with cooling phases of the rolling stock between individual rolling sequences, the stacking density of the rolling materials can be increased by this variable roller table segmentation. This significantly improves the throughput of the rolling train.

Gleichzeitig führt die variable Umrichterzuordnung des Teilsegments zu einer besseren Nutzung der Umrichter. Dadurch reichen bei günstiger Auslegung des Rollgangs insgesamt weniger Umrichter, um die gewünschte Funktionalität zu erreichen.At the same time, the variable inverter assignment of the subsegment leads to a better utilization of the inverters. As a result, with a favorable layout of the roller table, fewer total inverters are required to achieve the desired functionality.

Ein weiterer Vorteil liegt in einer Verminderung der Stromkosten, weil aktuell nicht benötigte Rollgangsmotoren durch die flexible Verschaltung entweder zweitweise mit geringerer Drehzahl betrieben oder in einen Standby-Betrieb versetzt werden.Another advantage is a reduction in electricity costs, because currently not required roller table motors by the flexible interconnection either secondarily with operated at a lower speed or placed in a standby mode.

Bei entsprechender Auslegung der Umschaltung erreicht man zumindest für das Teilsegment eine Redundanz der Antriebsversorgung. Wenn ein Umrichter ausfällt, kann mit dem anderen Umrichter ein Notbetrieb aufrechterhalten werden.With a suitable design of the switching, a redundancy of the drive supply is achieved at least for the subsegment. If one inverter fails, emergency operation can be maintained with the other inverter.

In einer vorteilhaften Ausprägung der Erfindung ist neben dem zuschaltbaren Teilsegment jedem Umrichter jeweils ein Segment des Rollgangs fix zugeordnet. Das erleichtert die Auslegung der Umrichter bei aufrechter Flexibilität des Rollgangs.In an advantageous embodiment of the invention, in each case one segment of the roller table is permanently assigned to each inverter in addition to the switchable sub-segment. This facilitates the design of the inverter with upright flexibility of the roller table.

Von Vorteil ist es zudem, wenn die Umschalteinheit mehrere Schütze umfasst, mittels welcher das Teilsegment an einen Umrichterausgang schaltbar ist. Die Schütze sind auf einfache Weise ansteuerbar und erlauben ein sicheres Umschalten der Umrichter. Günstigerweise sind die Schütze als Vakuumschütze ausgebildet, welche mehr Schaltspiele als gewöhnliche Leistungsschalter erlauben.It is also advantageous if the switching unit comprises a plurality of contactors, by means of which the sub-segment can be switched to an inverter output. The contactors are easy to control and allow safe switching of the inverter. Conveniently, the contactors are designed as vacuum contactors, which allow more switching operations than ordinary circuit breakers.

Bezüglich der Umrichter ist es vorteilhaft, wenn diese umschaltbare Parametersätze aufweisen. Für die möglichen Umrichterbelastungen werden vorab Parametersätze angelegt. Sobald eine Umschaltung des Teilsegments auf einen anderen Umrichter erfolgt, kommen die dafür vorgesehenen Parametersätze zur Anwendung.With regard to the converters, it is advantageous if they have switchable parameter sets. Parameter sets are created in advance for the possible converter loads. As soon as the subsegment is switched to another inverter, the parameter sets intended for this purpose are used.

Das erfindungsgemäße Verfahren sieht vor, dass während eines Walzstraßenbetriebs ein Teilsegment des Rollgangs mittels Umschalteinheit von einem Umrichter getrennt und/oder mit einem anderen Umrichter verbunden wird. Dabei ist es vorteilhaft, wenn laufend die Lage eines Walzgutes detektiert wird und abhängig davon eine Umschaltung des Teilsegments von einem Umrichter zu dem anderen Umrichter erfolgt. Das ermöglicht einen besonders sanften Weitertransport des Walzguts von einem Rollgangsegment zum nächsten.The inventive method provides that during a rolling mill operation, a sub-segment of the roller table is separated by means of switching unit of a converter and / or connected to another inverter. It is advantageous if continuously the position of a rolling stock is detected and depending on a switching of the subsegment takes place from one inverter to the other inverter. This allows a particularly smooth onward transport of the rolling stock from one roller table segment to the next.

Die Erfindung wird nachfolgend in beispielhafter Weise unter Bezugnahme auf die beigefügte Figur erläutert. Diese zeigt schematisch eine Walzstraße mit einer Ausprägung des erfindungsgemäßen Rollgangs.The invention will now be described by way of example with reference to the accompanying figure. This shows schematically a rolling train with an expression of the roller table according to the invention.

Die Darstellung umfasst ein Walzgerüst 4 mit beidseitig angeordneten Rollgängen 1, 1'. Ein erstes Walzgut 5 verlässt das Walzgerüst 4 und wird mittels Rollgang 1 weitertransportiert. Auf diesem Rollgang 1 befindet sich bereits ein weiteres Walzgut 5', das bereits das Walzgerüst 4 passiert hat und gegebenenfalls gekühlt wird.The illustration comprises a rolling stand 4 with rollers 1, 1 'arranged on both sides. A first rolling stock 5 leaves the rolling stand 4 and is transported further by means of roller table 1. On this roller table 1 is already another rolling 5 ', which has already passed the rolling stand 4 and optionally cooled.

Der Übersichtlichkeit halber wird die Erfindung nur anhand eines Rollgangs 1 erläutert. Vorteilhafterweise weist der Rollgang 1' auf der anderen Seite des Walzgerüsts 4 dieselben Merkmale auf.For the sake of clarity, the invention will be explained only with reference to a roller table 1. Advantageously, the roller table 1 'on the other side of the roll stand 4, the same features.

Der betrachtete Rollgang 1 weist eine Vielzahl von Rollen auf. Ein erstes Rollgangsegment a ist einem ersten Umrichter 2a fix zugeordnet. Die entsprechenden Rollenantriebe sind mit dem Ausgang des ersten Umrichters 2a direkt verbunden. Ein zweites Rollgangsegment b ist einem zweiten Umrichter 2b fix zugeordnet. Hinter diesem Rollgangsegment b weist der Rollgang 1 noch weitere Rollen auf, deren Antriebsversorgung nicht dargestellt ist.The considered roller table 1 has a plurality of rollers. A first roller table segment a is assigned to a first converter 2a fixed. The corresponding roller drives are directly connected to the output of the first converter 2a. A second roller table segment b is permanently assigned to a second converter 2b. Behind this roller table segment b, the roller table 1 has more roles, the drive power supply is not shown.

Zwischen den fix zugeordneten Rollgangsegmenten a, b ist ein Teilsegment c angeordnet, welches über eine Umschalteinheit 3 den beiden Umrichtern 2a, 2b variabel zuordenbar ist. Sowohl die Umrichter 2a, 2b als auch die Umschalteinheit 3 sind mit einer Steuerung STR verbunden. Das Teilsegment c ist mittels Umschalteinheit 3 über keinen Umrichter 2a, 2b, über nur einen Umrichter 2a oder 2b, oder über beide Umrichter 2a und 2b angetrieben. Im letzteren Fall müssen die Umrichter 2a, 2b zur Unterstützung eines Parallelbetriebs eingerichtet sein. Während das erste Walzgut 5 aus dem Walzgerüst 4 transportiert wird, bleibt beispielsweise das Teilsegment c des Rollgangs dem zweiten Umrichter 2b zugeordnet. Über diesen zweiten Umrichter 2b wird der dem zweiten Umrichter 2b zugeordnete Rollgangsabschnitt b, c mit geringer Drehzahl oder im Standby betrieben. Es wird Energie gespart, weil über den ersten Umrichter 2a nur das erste Rollgangsegment a unter Normallast betrieben wird. Sobald das erste Walzgut 5 das Ende des ersten fix zugeordneten Rollgangsegments a erreicht, wird mittels Steuerung STR das Teilsegment c vom zweiten Umrichter 2b auf den ersten Umrichter 2a umgeschaltet. Zum weiteren Transport des ersten Walzguts 5 steht ein entsprechend großer Rollgangsabschnitt a, c zur Verfügung. Währenddessen kann das dem zweiten Umrichter 2b fix zugeordnete Rollgangsegment b im Standy-Betrieb belassen werden.Between the fixed assigned roller table segments a, b, a sub-segment c is arranged, which is variably assigned via a switching unit 3 the two inverters 2a, 2b. Both the inverters 2a, 2b and the switching unit 3 are connected to a controller STR. The sub-segment c is driven by means of switching unit 3 via no converter 2a, 2b, via only one converter 2a or 2b, or via both converters 2a and 2b. In the latter case, the inverters 2a, 2b must be set up to support a parallel operation. While the first rolling stock 5 is being transported out of the rolling stand 4, for example, the sub-segment c of the roller table remains associated with the second converter 2b. About this second inverter 2b of the second inverter 2b associated roller table section b, c operated at low speed or standby. Energy is saved because only the first roller table segment a is operated under normal load via the first converter 2a. As soon as the first rolling stock 5 reaches the end of the first permanently assigned roller table segment a, the partial segment c is switched over from the second converter 2b to the first converter 2a by means of the control STR. For further transport of the first rolling stock 5, a correspondingly large roller table section a, c is available. Meanwhile, the second inverter 2b fixed assigned roller table segment b can be left in standby mode.

Nach einer Umkehrung der Transportrichtung des ersten Walzguts 5 und Freiwerden des variablen Teilsegments c wird das Teilsegment c wieder zum Transport des zweiten Walzguts 5' verfügbar und auf den zweiten Umrichter 2b umgeschaltet.After a reversal of the transport direction of the first rolling stock 5 and getting rid of the variable subsegment c, the sub-segment c is again available for transporting the second rolling stock 5 'and switched to the second inverter 2b.

Als Umrichter 2a, 2b werden vorzugsweise Frequenzumrichter mit umschaltbaren Parametersätzen eingesetzt. Solche Frequenzumrichter sind zur Unterstützung variabler Ausgangslasten eingerichtet. Bei einem Umschalten des Teilsegments c von einem Umrichter 2a bzw. 2b auf den anderen Umrichter 2b bzw. 2a erfolgt dann mittels Steuerung STR eine entsprechende Änderung der verwendeten Parametersätze.Frequency inverters with switchable parameter sets are preferably used as converters 2a, 2b. Such frequency converters are designed to support variable output loads. When switching the subsegment c from one inverter 2a or 2b to the other inverter 2b or 2a then takes place by means of control STR a corresponding change in the parameter sets used.

Die Ausgänge der Umrichter 2a, 2b sind über Schütze, die in der Umschalteinheit 3 angeordnet sind, mit den Antriebseinheiten der Rollen des variablen Teilsegments c verbunden. Vakuumschütze erlauben hohe Schaltspiele und demnach eine nahezu unbeschränkte Umschaltabfolge zwischen den beiden Umrichtern 2a, 2b.The outputs of the converters 2a, 2b are connected via contactors, which are arranged in the switching unit 3, with the drive units of the rollers of the variable sub-segment c. Vacuum contactors allow high switching cycles and therefore an almost unlimited switching sequence between the two converters 2a, 2b.

Falls die Umrichter 2a, 2b keinen Parallelbetrieb erlauben, ist es sinnvoll, die Ansteuerung der Schütze derart einzurichten, dass zwangsläufig immer nur ein Umrichter 2a bzw. 2b mit den Motoren des variablen Teilsegments c verbunden sein kann. Beispielsweise wird dies mittels einer geeigneten Sperrschaltung realisiert.If the converters 2a, 2b do not allow parallel operation, it makes sense to set up the actuation of the contactors in such a way that only one inverter 2a or 2b can necessarily be connected to the motors of the variable partial segment c. For example, this is realized by means of a suitable blocking circuit.

Claims (7)

  1. Roller table (1, 1') for transporting a rolled product (5, 5') in a rolling train, wherein the roller table (1, 1') has at least two drive segments driven via converters (2a, 2b), characterised in that at least one sub-segment (c) of the roller table (1, 1') is able to be switched by means of the switchover unit (3) to a first converter (2a) and/or a second converter (2b).
  2. Roller table according to claim 1, characterised in that, as well as the connectable sub-segment (c) each converter (2a, 2b) is respectively permanently assigned a segment (a, b) of the roller table.
  3. Roller table according to claim 1 or 2, characterised in that the switchover unit (3) comprises a number of contactors by means of which the sub-segment (c) is able to be switched to a converter output.
  4. Roller table according to claim 3, characterised in that the contactors are embodied as vacuum contactors.
  5. Roller table according to one of claims 1 to 4, characterised in that each converter (2a, 2b) has switchable parameter sets.
  6. Method for operating a roller table (1, 1') according to one of claims 1 to 5, characterised in that during operation one sub-segment (c) of the roller table (1, 1') is disconnected from a converter (2a or 2b) by means of switchover unit (3) and/or is connected to another converter (2b or 2a).
  7. Method according to claim 6, characterised in that the location of a rolled product (5, 5') is permanently detected and the sub-segment (c) is switched over from one converter (2a or 2b) to the other converter (2b or 2a) as a function thereof.
EP11733626.3A 2010-07-29 2011-07-06 Roller table of a rolling train Active EP2598264B1 (en)

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Application Number Priority Date Filing Date Title
EP11733626.3A EP2598264B1 (en) 2010-07-29 2011-07-06 Roller table of a rolling train

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP10171182 2010-07-29
EP11733626.3A EP2598264B1 (en) 2010-07-29 2011-07-06 Roller table of a rolling train
PCT/EP2011/061354 WO2012013459A1 (en) 2010-07-29 2011-07-06 Roller table of a rolling train

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EP2598264A1 EP2598264A1 (en) 2013-06-05
EP2598264B1 true EP2598264B1 (en) 2014-08-27

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WO (1) WO2012013459A1 (en)

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Publication number Priority date Publication date Assignee Title
JPS5794415A (en) 1981-09-30 1982-06-11 Hitachi Ltd Speed controlling device for hot rolling mill
JP3593978B2 (en) * 2000-12-28 2004-11-24 Ｊｆｅスチール株式会社 Threading method for tail of hot-rolled steel strip
KR100742889B1 (en) * 2001-09-12 2007-07-25 주식회사 포스코 An apparatus for treating cobble of hot coil
CN1231307C (en) * 2001-11-02 2005-12-14 北新建材(集团)有限公司 Continuous steel belt punching production line
FI118875B (en) * 2006-09-26 2008-04-15 Vacon Oyj Parallel connection of inverters

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CN103002999A (en) 2013-03-27
CN103002999B (en) 2015-04-01
EP2598264A1 (en) 2013-06-05
WO2012013459A1 (en) 2012-02-02

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