EP3691803B1 - Multi-flexible rolling mill - Google Patents

Multi-flexible rolling mill Download PDF

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Publication number
EP3691803B1
EP3691803B1 EP18758592.2A EP18758592A EP3691803B1 EP 3691803 B1 EP3691803 B1 EP 3691803B1 EP 18758592 A EP18758592 A EP 18758592A EP 3691803 B1 EP3691803 B1 EP 3691803B1
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EP
European Patent Office
Prior art keywords
rolling
pickling
region
strip
cold
Prior art date
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Active
Application number
EP18758592.2A
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German (de)
French (fr)
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EP3691803A1 (en
Inventor
Wolfgang Denker
Kerstin SPILL
Arnulf Wurm
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SMS Group GmbH
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SMS Group GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/28—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/30—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process
    • B21B1/32—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
    • B21B1/36—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by cold-rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0085—Joining ends of material to continuous strip, bar or sheet

Definitions

  • the invention relates to a system for pickling and / or cold rolling of metal strips, as they are from the U.S. 3,918,282 A is known, and a method carried out on the plant for pickling and / or cold rolling of metal strips.
  • the preamble of claim 1 is based on U.S. 3,918,282 A .
  • EP 3 006 122 A1 discloses coupling an endless pickling line to a reversing rolling line.
  • pickled metal strips are used to produce large coils with a coil weight of 100 to 300 tons, each of which is cut off by a subsequent strip.
  • smaller coils are produced and transported away from a large coil produced in the first cold rolling pass.
  • pickled strip is stored in a memory connected to the pickling device. Strip from the store is then connected to a remainder from a preceding rolling operation in the rolling mill before the next rolling pass, in order to then produce a next rolled large coil.
  • the belt By separating the large bundles from the subsequent belt, the belt can be moved in one system EP 3 006 122 A1 not be rolled endlessly, but is first decoupled and then connected again. Furthermore, in EP 3 006 122 A1 no production of pickled, non-rolled strips intended. Finally is after EP 3 006 122 A1 no provision of tape material from the reel on which the tape to the large coil is provided is rolled up. On the contrary, a reversing rolling process has to be carried out in order to remove the strip from the rolling mill.
  • EP 2 516 076 B1 discloses an endless pickling line coupled to a reversing mill. To reduce the dimensional lengths, the strip is subjected to a first rolling process after a pickling step, the rolled strip length being greater than the targeted strip length of the finished coil. In a reversing rolling process, excess strip is first fed back into a strip store, before the subsequently rolled strip is brought to the desired coil size with a suitable separating cut.
  • JPS5564906 discloses a single-stand skin pass mill, which can optionally pass pre-pickled strip that has been served, or, coupled with a pickling line, can produce pickled and dressed strip in continuous operation.
  • the direction of production of the pickling line runs in the opposite direction to that of the skin-pass mill. It has been found to be disadvantageous here that a section of a strip, the length of which corresponds to the length of the pickling basin, remains in the pickling basin and is thereby overpickled as long as skin pass is carried out in a discontinuous batch operation.
  • a production of larger bundles is appropriate JPS5564906 not provided.
  • JPS5564906 likewise discloses no reversing and also no pickling without the rolling / skin-pass process.
  • EP 1 148 956 B1 discloses a plant for flexible and economical pickling and cold rolling of metal strips.
  • the plant according to EP 1 148 956 B1 has a push pickling line with which a strip of a defined length is pickled, which is either served or immediately rolled further. Alternatively, pre-pickled strips can also be fed to the rolling plant via the central reel arrangement. Due to the configuration of a push pickling line, continuous production is not possible, as bundles of a defined strip length are always produced in one piece. The production of coils with more than one standard coil size (jumbo coils) is also not planned.
  • the present invention provides a plant for the continuous pickling and / or cold rolling of metal strips.
  • the system according to the invention it is possible to process metal strips exclusively with an endless pickling process (continuous pickling process) on one and the same system, to process metal strips exclusively with a cold rolling process, and to process metal strips both with an endless pickling process and with a cold rolling process coupled with it .
  • the plant according to the invention has a pickling area for endless pickling of a metal strip and a cold rolling area for rolling a (the same or a different) metal strip.
  • the pickling area has at least one unwinding device for unrolling metal strips to be pickled. Suitable metal strips are preferably metal strips which the unwinding device can unroll from a corresponding coil or bundle.
  • the pickling area furthermore has at least one welding device for connecting metal strips unrolled by the unwinding device to form an endless metal strip to be pickled, and a pickling device for pickling the endless metal strip.
  • the pickling area also has at least one roll-up device which is used to roll up a metal strip (for example at least one Part of the endless metal belt if the system is working in a decoupled operation described below) is set up.
  • the cold rolling area has at least one pair of work rolls for rolling a metal strip to be rolled and a winding device for rolling up the rolled metal strip.
  • the roll-up device of the cold rolling area is connected downstream of the at least one pair of rolls in the production direction and can be set up to roll up metal strips into standard coils or into large coils (jumbo coils).
  • the system has strip guide elements which are arranged and set up in such a way that, in a coupled operation, the pickling area and the cold rolling area are coupled with regard to guiding a metal strip so that an endless metal strip pickled in the pickling area can be fed to the cold rolling area for rolling.
  • strip guide elements are components of the system that are suitable and arranged, for example, to transport a metal strip and / or to control its transport direction. Examples of suitable strip guide elements include guide tables for guiding and transporting metal strips and strip switches which are suitable for changing a guide direction of a metal strip.
  • the strip guide elements are further arranged and set up in such a way that, in a decoupled operation, the pickling area and the cold rolling area are completely decoupled with regard to guiding a metal strip.
  • a metal strip is not transported from the pickling area to the cold rolling area and no system components are operated simultaneously by both the pickling area and the cold rolling area.
  • a suitable strip switch can be provided, which suitably controls a transport direction of the metal strip.
  • the strip guide elements are arranged in decoupled operation in such a way that at least part of an endless metal strip pickled in the pickling area can be fed to the reeling device of the pickling area for rolling up.
  • the strip guide elements include the strip guide elements a strip switch in the pickling area, which is set up to feed the pickled endless metal strip in the pickling area to the winding device of the pickling area to be rolled up in decoupled operation.
  • the strip guide element is thus suitable for connecting or separating two structurally independent areas.
  • coupling / decoupling of an endless pickling process with a cold rolling process is thus advantageously possible.
  • the system according to the invention thus enables endless pickling in decoupled operation without a cold rolling process and, in coupled operation, endless pickling with immediately subsequent cold rolling.
  • the system according to the invention thereby allows an advantageously high flexibility with regard to these possible operating modes on just one system.
  • the cold rolling area also has an unwinding device for unrolling a metal strip to be rolled, and strip guide elements which are set up so that in the decoupled operation a metal strip to be rolled can be fed from the unwinding device of the cold rolling area to the pair of work rolls for rolling.
  • decoupled operation cold rolling is also possible without upstream pickling, which further increases the flexibility of the plant.
  • the pickling area has at least one strip store which is set up to at least partially store a metal strip connected to the welding device to form an endless strip.
  • a strip storage device which is arranged between the welding device and the pickling device, can be used to compensate for differences between a speed of the metal strip leaving the welding system and a speed at which a metal strip can pass the pickling device.
  • a strip store which is arranged behind the pickling device and, for example, in front of the roll-up device of the pickling area, can be used to roll up the pickled metal strip stored in the strip store at a higher speed than the metal strip leaves the pickling device.
  • the at least one band storage device thus also contributes to the flexibility of the system and, in particular, favors the use of endless metal bands.
  • the plant also has a transition area between the pickling area and the cold rolling area.
  • the transition area has transport means, for example suitable Lithuanian tables, for transporting an endless metal strip pickled in the pickling area for rolling into the cold rolling area.
  • the transition area also has a welding device which is set up to connect a head piece of the pickled endless metal strip to a coupling strip piece when switching to the coupled mode.
  • the coupling band piece can be placed in the transition area, for example, in order to bring an endless band that has passed the pickling area into the cold rolling area and in particular between the pair of work rolls when switching to the coupled operation of the plant.
  • the coupling tape with the attached tape beginning / head piece can be passed between the rollers of the at least one pair of rollers.
  • the roll gap between the work roll pair can be set to the target thickness or have a larger gap. After passing the coupling belt, it can be closed directly. In both cases, the endless strip that is actually to be rolled is rolled without any significant dimension lengths.
  • the rolling device of the cold rolling area is set up to enable both continuous rolling and batch rolling. In a preferred embodiment, the rolling device of the cold rolling area is set up to enable both a one-way rolling operation and a reversing rolling operation. In these embodiments, the cold rolling area can have strip transport and guide means suitable for these operations in particular, as well as a correspondingly set up control unit for the corresponding manual and / or automated operation.
  • the rolling device of the cold rolling area is set up to enable both a reducing rolling operation and a skin pass rolling operation.
  • suitable roller sets with suitable roller roughness are preferably provided. Further measures, such as the uncoupling of roller sets from the drive, a reduction in the adjustment force, etc., are preferably also provided.
  • the system preferably enables at least three of the operating modes a) to e). Although theoretically all operating modes a) to e) can be implemented by a single system, it has proven advantageous to limit the system to changing between three of the five operating modes mentioned. It has been shown that a combination of three of the operating modes a) to e) enables a desirable flexible system, but the system is then at the same time suitable for practice and is also advantageous from a production point of view and with regard to federal logistics.
  • the system preferably the cold rolling area with its own assigned unwinding device and winding device
  • multiple coils with a coil size of three standard coils (approx. 30-35 to, up to 25 kg / mm spec. Weight), i.e. a total of around 100 tons. It has been found that the required stability is achieved in this way, with a constriction during winding processes remaining within acceptable tolerances.
  • the present invention further provides a method for pickling and / or cold rolling metal strips on a plant as described above.
  • the method initially involves setting the strip guide elements so that the system can work in the coupled mode.
  • a strip switch upstream of the cold rolling area in the production direction can be set in such a way that, after pickling, an endless metal strip can be fed from the pickling area via the strip switch to the cold rolling area.
  • the step of adjusting the strip guiding elements can be carried out at any suitable point in time during the process.
  • the method further comprises a step of feeding an endless metal strip to the pickling device of the pickling area and a step of pickling the endless metal strip with the pickling device.
  • the method has a step of transporting the pickled endless metal strip into the cold rolling area.
  • the method includes a step of rolling the pickled endless metal strip with the at least one pair of work rolls.
  • the method has a step of rolling up the pickled and rolled endless metal strip with the winding device of the cold rolling area.
  • the rolled endless belt is rolled up, for example, in such a way that sections of the endless belt are rolled up into standard coils or large coils, for example, which are then separated from the remaining endless belt and transported away individually. The process can thus be used to manufacture coils of pickled and rolled metal strips in continuous operation.
  • the cold rolling area also has a severing device, for example a pair of scissors, which is arranged behind the at least one pair of work rolls in the production direction.
  • the method has a step of connecting a head piece of the pickled endless metal strip to the coupling strip piece in the transition area.
  • the method further has a step of guiding of the coupling tape piece by the at least one pair of work rolls.
  • the method further comprises a step of severing the coupling tape piece with the severing device from the endless metal tape after the coupling tape piece has been passed through the at least one pair of work rolls.
  • the method preferably further comprises a step of positioning a rolling distance of the at least one pair of rolls so that the endless strip following the coupling piece is rolled to the target thickness.
  • the method further includes setting the strip guide elements so that the system can work in the decoupled mode.
  • a strip switch upstream of the cold rolling area in the production direction can be set in such a way that an endless metal strip after pickling cannot be fed from the pickling area via the strip switch to the cold rolling area, but can be fed to the winding device of the pickling area.
  • the step of adjusting the strip guide elements can be carried out at any suitable point in time during the process in order to couple or decouple the structurally independent areas of the pickling line and the cold rolling mill.
  • the method further comprises feeding an endless metal strip to the pickling device of the pickling area, pickling the endless metal strip with the pickling device, and rolling up at least part of the pickled endless metal strip with the winding device of the pickling area.
  • the pickled endless belt is partially rolled up, for example, in such a way that sections of the endless belt are rolled up into standard coils or large coils, for example, which are then separated from the remaining endless belt and transported away individually.
  • the pickling area preferably has a suitable separating device, for example a pair of scissors, which is connected after the pickling device in the production direction and upstream of the winding device of the pickling area.
  • the method includes, before the step of feeding the endless metal strip from the pickling area to the rolling area, the coupling band piece is placed in the transition area.
  • the plant is divided into a pickling area A, a cold rolling area B and a transition area C, which is located between the pickling area A and the cold rolling area B.
  • the following description focuses on the main components of the system. For the sake of clarity, any tables, pulleys, bridle, drive rollers, media systems, transport trolleys, etc. that may be provided are not described.
  • the system comprises an unwinding unit (unwinding device) 1, for example for standard coils or standard coils (eg approx. 30 to coil weight).
  • the unwinding unit 1 can, however, also be designed for large coils or jumbo coils (for example up to approx. 100 to coil weight), which enables the system to be more flexible in this regard.
  • the system further comprises a welding machine (welding device) 2 for connecting individual strips, which are unwound from the unwinding unit 1, to form an endless strip.
  • the system further comprises a strip store 3, a pickling device 4, a further strip store 5, a separating device (e.g. scissors) 6, as well as a winding unit (reeling device) 7 and a strip guide element in the form of a strip switch 8.
  • the winding unit 7 can alternatively comprise one or two reels, or it can also be provided as a turning reel.
  • the winding unit 7 can preferably be designed to produce standard coils, which enables simple serving and avoids external separation of large coils.
  • the strip switch 8 is an example of a strip guide element which can be provided in order to feed a pickled endless strip to the winding unit 7 in a decoupled operation of the system if no subsequent cold rolling process is planned.
  • the strip switch serves to couple / decouple the structurally independent areas of the pickling line and the cold rolling mill.
  • a bundle or coil rolled up by the winding unit 7 can be suitably transported away from there.
  • the system according to the invention thus enables the production of continuously pickled, non-rolled metal strip in decoupled operation. In this operation, the pickling area A and the cold rolling area B are decoupled.
  • a roll change is or can be carried out during a coupling of the pickling area A with the cold rolling area B (in the coupled operation of the plant).
  • a further tape store 9 is optionally provided for this possibility, at least for the required period of time, which can preferably be arranged between the separating device 6 and the winding unit 7, or the tape store 5 is designed correspondingly larger.
  • suitable strip guide elements are provided so that a pickled endless strip can be transported from the pickling area A to the cold rolling area B via suitable guide tables, for example.
  • suitable tape transport devices can also be provided in the transition area C for this purpose.
  • Cold rolling area B comprises an unwinding unit (unwinding device) 10, for example for standard coils or large coils, and a rolling device which comprises one or more roll stands 11.
  • the roll stands 11 each have at least one pair of work rolls 11a, 11b which carry out the forming work or the skin pass work.
  • a further separating device 12 for example in the form of a pair of scissors 12
  • a winding unit (reeling device) 13 are provided in the outlet of the cold rolling area B.
  • the winding unit 13 can also be designed for standard coils or large coils, so that the system can preferably be designed both for operation with standard coils and for operation with large coils.
  • a single system can preferably enable both operations.
  • the covenants can be served in various ways, which are described below.
  • the system can also be used to supply pre-pickled coils, e.g. from other systems, in order to (only) cold-roll them with the system shown.
  • pre-pickled coils e.g. from other systems
  • With consistent one-way operation of the system it is also possible that coils that have already been rolled once with the system shown can be fed back to the unwinding unit 10 in order to be rolled again (back-to-back rolling).
  • the cold rolling area B can also be designed as a reversing system.
  • a first rolling pass can then take place in an endless mode and a subsequent rolling pass can then be a reversing process in a batch or semi-endless mode.
  • the rolling device 11 consists of a maximum of two roll stands, since with three or more stands the reversing rolling process can have undesirable effects in terms of technical control, the usual stitch sequences and the dimension lengths.
  • the reversing process means a decoupling of the area of the cold rolling mill B from the pickling area A.
  • the strip guide element in the form of the strip switch must be set so that the plant can work in coupled operation.
  • the head piece of the new pickled endless strip that is still to be rolled is preferably welded to the coupling strip placed in the transition area in order to be subsequently rolled in the cold rolling mill.
  • a transport system with pallets (14) instead of a transport system with coil lift trucks or walking beam conveyors.
  • Such a system is in the cold rolling area B in Fig. 2 outlined.
  • This pallet transport system (14) in area B is also advantageous if the system is operated exclusively in one-way mode (for example only in the production direction indicated in the figure), since it is a convenient circulation system for the back-to-back described above. Rolling enabled. Since the pallet transport system can also be used in reversing operation, it has proven to be particularly suitable for the system, which can thus be operated flexibly in one-way operation and reversing operation. Particularly when winding large bundles and handling bundles, as well as when rolling thin end thicknesses, the use of appropriate sleeves is preferably provided. This is used for increased security. For the sake of clarity, this is not shown in the figures.
  • coil logistics can alternatively take place, for example, using coil lift trucks 15.
  • Such bundle logistics are in Fig. 2 sketched by way of example in pickling area A using coil transport 15a and 15b.
  • individual bundles / standard coils are transported on a bundle lift truck 15a to the unwinding unit 1 or transported away from the winding unit 7 (with a bundle lift truck 15b).
  • a transition area C is arranged between the pickling area A and the cold rolling area B in the plant shown.
  • Such a transition area C can be provided in particular if the system shown is intended as a modernization of an existing system or if the structural requirements require greater distances.
  • the transition device C bridges a greater spatial distance (for example more than 20 m) between the pickling area A and the cold rolling area B. If the plant is operated in coupled operation, a pickled strip can be passed through the transition area C into the cold rolling area B without further work steps, in order to be reshaped there.
  • the transition range can be used as follows. As in Fig. 1 As shown, a welding machine 20 is arranged in the transition area C. A coupling band piece 21, which corresponds approximately to the length of the transition area C, can be placed in this area. The welding machine 20 can then be used to connect an end of the coupling band 21 facing the pickling area A to a head piece (or beginning of the band) of a pickled endless metal strip guided from the pickling area A into the transition area C. The coupling tape with the beginning of the tape attached is then passed through the roll stands 11 (between the rolls of the roll pairs 11a, 11b).
  • a roll gap between the rolls of the roll pairs 11a, 11b can be closed directly after passing the coupling belt 21, so that the endless metal strip actually to be rolled can be rolled without any appreciable dimensional lengths.
  • Passing the coupling belt 21 through the roll stands (11) without reducing the thickness has the advantage that the coupling belt can be used more frequently before it is scrapped.
  • the thickness can be selected independently of the endless belt. However, it is not absolutely necessary.
  • the coupling belt 21 can be wound onto the winding unit 13, for example, and when it passes a separating device 12 (for example a pair of scissors 12) it can be separated from the subsequent endless metal belt in order to be conveyed out separately.
  • the actual rolling stock is then rolled to the target thickness and wound up with the winding unit 13.
  • the winding unit 13 can consist of two reels, a turning reel or also a reel and a pup-coil reel of a simple design.
  • One of the reels or the pup coil reel can then be used to wind the coupling tape during the The (main) reel is also available for winding up the pickled and rolled endless metal strip (this solution is not shown in the figures).
  • the pup coil with the coupling belt 21 can then be returned to the pickling area A for recycling.
  • the coupling strip can be fed to the pickling area A when a last strip passes the pickling device A in the coupled operating mode of the system.
  • the coupling belt 21 can then be welded between the end of the last belt of the coupled operation, which is rolled in the coupled operating mode, and a beginning of a subsequent first belt of the decoupled operating mode, in order to be transported with these belts in the production direction.
  • a separating device 6 is provided at the end of the pickling area A
  • a separating device 23 is provided at the beginning of the cold rolling area B near the unwinding unit 10 (still functionally part of the transition area C).
  • the coupling band 21 can thus be cut out before and after the area C by means of the separating devices 6 and 23, for example by means of two scissors, in order to remain in the area C until the next coupling.
  • the scissors 6 of the pickling area A can be used in decoupled operation to separate sections of pickled endless strip, which have been rolled up onto the reeling device 7, from the remaining endless strip in order to produce coils of pickled, non-rolled metal strip.
  • the cold rolling area B can perform further rolling tasks in one-way / batch or reversing operation.
  • the cold rolling area B can switch between reduced operation and skin pass operation.
  • appropriate roller sets with a suitable roller roughness are provided.
  • Further measures, such as decoupling sets of rollers from the drive, reducing the adjustment force, etc., can be provided constructively.
  • DCR Double Cold Reduction Mill

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Description

1. Gebiet der Erfindung1. Field of the invention

Die Erfindung betrifft eine Anlage zum Beizen und/oder Kaltwalzen von Metallbändern, wie sie aus der US 3 918 282 A bekannt ist, und ein auf der Anlage ausgeführtes Verfahren zum Beizen und/oder Kaltwalzen von Metallbändern. Der Oberbegriff von Anspruch 1 basiert auf der US 3 918 282 A .The invention relates to a system for pickling and / or cold rolling of metal strips, as they are from the U.S. 3,918,282 A is known, and a method carried out on the plant for pickling and / or cold rolling of metal strips. The preamble of claim 1 is based on U.S. 3,918,282 A .

2. Technischer Hintergrund2. Technical background

In gekoppelten Beiz-Tandemstraßen (beispielsweise im Englischen als Pickling Line and Tandem Cold Mill, PLTCM, bekannt), wird ein endlos zusammengeschweißtes Metallband zunächst gebeizt, anschließend in einer mehrgerüstigen Tandemstraße kaltgewalzt, und im Anschluss in der gewünschten Bundgröße getrennt und aufgewickelt.In coupled pickling tandem mills (known as Pickling Line and Tandem Cold Mill, PLTCM, for example), an endlessly welded metal strip is first pickled, then cold-rolled in a multi-stand tandem mill, and then separated and wound up in the desired coil size.

EP 3 006 122 A1 offenbart ein Koppeln einer Endlosbeizanlage mit einer Reversierwalzanlage. In einem ersten Kaltwalzdurchlauf werden aus gebeizten Metallbändern Großbunde mit einem Bundgewicht von 100 bis 300 to produziert, die jeweils von einem nachfolgenden Band abgeschnitten werden. Im Anschluss an einen auf den ersten Kaltwalzdurchlauf folgenden Reversierwalzvorgang werden aus einem im ersten Kaltwalzdurchlauf produzierten Großbund kleinere Bunde produziert und abtransportiert. Während dieser Walzbetriebe wird währenddessen gebeiztes Band in einem sich an die Beizvorrichtung anschließenden Speicher gespeichert. Band aus dem Speicher wird dann vor einem nächsten Walzstich mit einem aus einem vorrangehenden Walzbetrieb in der Walzanlage verbleibenden Restende verbunden, um dann einen nächsten gewalzten Großbund zu produzieren. EP 3 006 122 A1 discloses coupling an endless pickling line to a reversing rolling line. In a first cold rolling pass, pickled metal strips are used to produce large coils with a coil weight of 100 to 300 tons, each of which is cut off by a subsequent strip. Following a reversing rolling process following the first cold rolling pass, smaller coils are produced and transported away from a large coil produced in the first cold rolling pass. During these rolling operations, pickled strip is stored in a memory connected to the pickling device. Strip from the store is then connected to a remainder from a preceding rolling operation in the rolling mill before the next rolling pass, in order to then produce a next rolled large coil.

Durch die Trennung der Großbunde vom nachfolgenden Band kann das Band in einer Anlage nach EP 3 006 122 A1 nicht endlos gewalzt werden, sondern wird zunächst entkoppelt um anschließend wieder verbunden zu werden. Weiterhin ist in EP 3 006 122 A1 keine Herstellung von gebeizten, nicht gewalzten Bändern vorgesehen. Schließlich ist nach EP 3 006 122 A1 keine Abdienung von Bandmaterial von dem Haspel vorgesehen, auf den das Band zum Großbund aufgerollt wird. Im Gegenteil muss ein Reversierwalzvorgang durchgeführt werden, um das Band aus der Walzanlage abzudienen.By separating the large bundles from the subsequent belt, the belt can be moved in one system EP 3 006 122 A1 not be rolled endlessly, but is first decoupled and then connected again. Furthermore, in EP 3 006 122 A1 no production of pickled, non-rolled strips intended. Finally is after EP 3 006 122 A1 no provision of tape material from the reel on which the tape to the large coil is provided is rolled up. On the contrary, a reversing rolling process has to be carried out in order to remove the strip from the rolling mill.

EP 2 516 076 B1 offenbart eine Endlosbeizanlage, die mit einer Reversierwalzanlage gekoppelt ist. Zur Reduktion der Abmaßlängen wird das Band nach einem Beizschritt einem ersten Walzvorgang unterworfen, wobei die gewalzte Bandlänge größer ist als die anvisierte Bandlänge des Fertigbundes. Über einen Reversierwalzvorgang wird überschüssiges Band zunächst in einen Bandspeicher zurückgefördert, bevor mit einem geeigneten Trennschnitt das nachfolgend gewalzte Band auf die gewünschte Bundgröße gebracht wird. EP 2 516 076 B1 discloses an endless pickling line coupled to a reversing mill. To reduce the dimensional lengths, the strip is subjected to a first rolling process after a pickling step, the rolled strip length being greater than the targeted strip length of the finished coil. In a reversing rolling process, excess strip is first fed back into a strip store, before the subsequently rolled strip is brought to the desired coil size with a suitable separating cut.

Auch bei der Anlage gemäß EP 2 516 076 B1 wird das Band nicht endlos gewalzt, sondern für einen Reversierwalzbetrieb entkoppelt. Auch gemäß EP 2 516 076 B1 ist es nicht vorgesehen, Bunde nach einem Beizen abzudienen.Even with the system according to EP 2 516 076 B1 the strip is not rolled endlessly, but decoupled for a reversing rolling operation. Also according to EP 2 516 076 B1 it is not intended to serve bundles after pickling.

JPS5564906 offenbart ein eingerüstiges Dressierwalzwerk, welches wahlweise vorgebeizte zugediente Bänder dressieren kann, oder mit einer Beize gekoppelt im Endlosbetrieb gebeiztes und dressiertes Band produzieren kann. Dabei läuft die Produktionsrichtung der Beize entgegengesetzt der des Dressiergerüstes. Es hat sich hierbei als nachteilig herausgestellt, dass ein Teilstück eines Bandes, dessen Länge der Länge des Beizbeckens entspricht, im Beizbecken verbleibt und dadurch überbeizt wird, solange ein Dressieren in einem nicht kontinuierlichen Batch-Betrieb erfolgt. Eine Produktion von größeren Bunden ist gemäß JPS5564906 nicht vorgesehen. JPS5564906 offenbart ebenfalls kein Reversieren und auch kein Beizen ohne Walz-/Dressiervorgang. JPS5564906 discloses a single-stand skin pass mill, which can optionally pass pre-pickled strip that has been served, or, coupled with a pickling line, can produce pickled and dressed strip in continuous operation. The direction of production of the pickling line runs in the opposite direction to that of the skin-pass mill. It has been found to be disadvantageous here that a section of a strip, the length of which corresponds to the length of the pickling basin, remains in the pickling basin and is thereby overpickled as long as skin pass is carried out in a discontinuous batch operation. A production of larger bundles is appropriate JPS5564906 not provided. JPS5564906 likewise discloses no reversing and also no pickling without the rolling / skin-pass process.

EP 1 148 956 B1 offenbart eine Anlage zum flexiblen und wirtschaftlichen Beizen und Kaltwalzen von Metallbändern. Die Anlage gemäß EP 1 148 956 B1 hat eine Schubbeize, mit welcher ein Band definierter Länge gebeizt wird, welches entweder abgedient wird, oder unmittelbar weiter gewalzt wird. Alternativ können auch vorgebeizte Bänder der Walz-Anlage über die zentrale Haspelanordnung zugedient werden. Bedingt durch die Konfiguration einer Schubbeize ist eine Endlosproduktion nicht möglich, da stets Bunde einer definierten Bandlänge am Stück gefertigt werden. Die Produktion von Bunden mit mehr als einer Standardbundgröße (Jumbo-Coils) ist ebenfalls nicht vorgesehen. EP 1 148 956 B1 discloses a plant for flexible and economical pickling and cold rolling of metal strips. The plant according to EP 1 148 956 B1 has a push pickling line with which a strip of a defined length is pickled, which is either served or immediately rolled further. Alternatively, pre-pickled strips can also be fed to the rolling plant via the central reel arrangement. Due to the configuration of a push pickling line, continuous production is not possible, as bundles of a defined strip length are always produced in one piece. The production of coils with more than one standard coil size (jumbo coils) is also not planned.

Angesichts dessen ist es eine Aufgabe der vorliegenden Erfindung, eine Anlage zum Endlosbeizen und/oder Kaltwalzen von Metallbändern und ein entsprechendes Verfahren vorzusehen, wobei die Anlage eine erhöhte Flexibilität hinsichtlich möglicher Betriebsmodi und verwendeter Ausgangscoils, sowie ein vergrößertes Produktspektrum ermöglicht. Vorzugsweise sollen auch Nebenzeiten und Abmaßlängen begrenzt werden.In view of this, it is an object of the present invention to provide a system for endless pickling and / or cold rolling of metal strips and a corresponding method, the system allowing increased flexibility with regard to possible operating modes and starting coils used, as well as an enlarged product range. Non-productive times and dimensional lengths should preferably also be limited.

3. Zusammenfassung der Erfindung3. Summary of the Invention

Diese und andere Aufgaben werden durch eine Anlage zum Endlosbeizen und/oder Kaltwalzen von Metallbändern gemäß Anspruch 1 und durch ein Verfahren zum Beizen und/oder Kaltwalzen von Metallbändern gemäß Anspruch 9 gelöst.These and other objects are achieved by a system for endless pickling and / or cold rolling of metal strips according to claim 1 and by a method for pickling and / or cold rolling of metal strips according to claim 9.

Die vorliegende Erfindung stellt eine Anlage zum Endlosbeizen und/oder Kaltwalzen von Metallbändern bereit. Mit anderen Worten ist es mit der erfindungsgemäßen Anlage möglich, auf ein und derselben Anlage Metallbänder ausschließlich mit einem Endlosbeizprozess (Durchlaufbeizprozess) zu bearbeiten, Metallbänder ausschließlich mit einem Kaltwalzprozess zu bearbeiten, und Metallbänder sowohl mit einem Endlosbeizprozess als auch mit einem damit gekoppelten Kaltwalzprozess zu bearbeiten.The present invention provides a plant for the continuous pickling and / or cold rolling of metal strips. In other words, with the system according to the invention, it is possible to process metal strips exclusively with an endless pickling process (continuous pickling process) on one and the same system, to process metal strips exclusively with a cold rolling process, and to process metal strips both with an endless pickling process and with a cold rolling process coupled with it .

Dementsprechend weist die erfindungsgemäße Anlage einen Beizbereich zum Endlosbeizen eines Metallbands und einen Kaltwalzbereich zum Walzen eines (desselben oder eines anderen) Metallbands auf. Der Beizbereich weist zumindest eine Abrollvorrichtung zum Abrollen von zu beizenden Metallbändern auf. Geeignete Metallbänder sind vorzugsweise Metallbänder, die die Abrollvorrichtung von einem entsprechenden Coil oder Bund abrollen kann. Der Beizbereich weist weiter zumindest eine Schweißvorrichtung zum Verbinden von durch die Abrollvorrichtung abgerollten Metallbändern zu einem zu beizenden Endlosmetallband auf, und eine Beizvorrichtung zum Beizen des Endlosmetallbands. Der Beizbereich weist weiter zumindest eine Aufrollvorrichtung auf, die zum Aufrollen eines Metallbands (z.B. zumindest einem Teil des Endlosmetallbands, wenn die Anlage in einem unten beschriebenen entkoppelten Betrieb arbeitet) eingerichtet ist.Accordingly, the plant according to the invention has a pickling area for endless pickling of a metal strip and a cold rolling area for rolling a (the same or a different) metal strip. The pickling area has at least one unwinding device for unrolling metal strips to be pickled. Suitable metal strips are preferably metal strips which the unwinding device can unroll from a corresponding coil or bundle. The pickling area furthermore has at least one welding device for connecting metal strips unrolled by the unwinding device to form an endless metal strip to be pickled, and a pickling device for pickling the endless metal strip. The pickling area also has at least one roll-up device which is used to roll up a metal strip (for example at least one Part of the endless metal belt if the system is working in a decoupled operation described below) is set up.

Bei der erfindungsgemäßen Anlage weist der Kaltwalzbereich zumindest ein Paar von Arbeitswalzen zum Walzen eines zu walzenden Metallbands und eine Aufrollvorrichtung zum Aufrollen des gewalzten Metallbands auf. Die Aufrollvorrichtung des Kaltwalzbereichs ist dem zumindest einen Paar von Walzen in Produktionsrichtung nachgeschaltet und kann zum Aufrollen von Metallbändern zu Standardcoils oder zu Großbunden (Jumbo-Coils) eingerichtet sein.In the plant according to the invention, the cold rolling area has at least one pair of work rolls for rolling a metal strip to be rolled and a winding device for rolling up the rolled metal strip. The roll-up device of the cold rolling area is connected downstream of the at least one pair of rolls in the production direction and can be set up to roll up metal strips into standard coils or into large coils (jumbo coils).

Erfindungsgemäß weist die Anlage Bandleitelemente auf, die so angeordnet und eingerichtet sind, dass in einem gekoppelten Betrieb der Beizbereich und der Kaltwalzbereich hinsichtlich einer Führung eines Metallbands so gekoppelt sind, dass ein im Beizbereich gebeiztes Endlosmetallband dem Kaltwalzbereich zum Walzen zugeführt werden kann. Hierbei sind Bandleitelemente Bauteile der Anlage, die beispielsweise geeignet und angeordnet sind, ein Metallband zu transportieren und/oder dessen Transportrichtung zu steuern. Beispiele für geeignete Bandleitelemente umfassen Leittische zum Führen und Transportieren von Metallbändern und Bandweichen, die geeignet sind, eine Führungsrichtung eines Metallbandes zu ändern.According to the invention, the system has strip guide elements which are arranged and set up in such a way that, in a coupled operation, the pickling area and the cold rolling area are coupled with regard to guiding a metal strip so that an endless metal strip pickled in the pickling area can be fed to the cold rolling area for rolling. Here, strip guide elements are components of the system that are suitable and arranged, for example, to transport a metal strip and / or to control its transport direction. Examples of suitable strip guide elements include guide tables for guiding and transporting metal strips and strip switches which are suitable for changing a guide direction of a metal strip.

Bei der erfindungsgemäßen Anlage sind die Bandleitelemente weiter so angeordnet und eingerichtet, dass in einem entkoppelten Betrieb der Beizbereich und der Kaltwalzbereich hinsichtlich einer Führung eines Metallbands vollständig entkoppelt sind. Mit anderen Worten wird im entkoppelten Betrieb ein Metallband nicht von dem Beizbereich in den Kaltwalzbereich transportiert und keine Anlagenbestandteile werden gleichzeitig sowohl vom Beizbereich als auch vom Kaltwalzbereich betrieben. Beispielsweise kann vor einem Übergang vom Beizbereich zum Kaltwalzbereich eine geeignete Bandweiche vorgesehen sein, die eine Transportrichtung des Metallbands geeignet steuert.In the system according to the invention, the strip guide elements are further arranged and set up in such a way that, in a decoupled operation, the pickling area and the cold rolling area are completely decoupled with regard to guiding a metal strip. In other words, in decoupled operation, a metal strip is not transported from the pickling area to the cold rolling area and no system components are operated simultaneously by both the pickling area and the cold rolling area. For example, before a transition from the pickling area to the cold rolling area, a suitable strip switch can be provided, which suitably controls a transport direction of the metal strip.

Bei der erfindungsgemäßen Anlage sind die Bandleitelemente im entkoppelten Betrieb so angeordnet, dass zumindest ein Teil eines im Beizbereich gebeizten Endlosmetallbands der Aufrollvorrichtung des Beizbereichs zum Aufrollen zugeführt werden kann. Somit umfassen in einer bevorzugten Ausführungsform die Bandleitelemente eine Bandweiche im Beizbereich, die eingerichtet ist, im entkoppelten Betrieb im Beizbereich gebeiztes Endlosmetallband der Aufrollvorrichtung des Beizbereichs zum Aufrollen zuzuleiten. Das Bandleitelement ist somit geeignet, zwei strukturell eigenständige Bereiche zu verbinden oder zu trennen.In the system according to the invention, the strip guide elements are arranged in decoupled operation in such a way that at least part of an endless metal strip pickled in the pickling area can be fed to the reeling device of the pickling area for rolling up. Thus, in a preferred embodiment, include the strip guide elements a strip switch in the pickling area, which is set up to feed the pickled endless metal strip in the pickling area to the winding device of the pickling area to be rolled up in decoupled operation. The strip guide element is thus suitable for connecting or separating two structurally independent areas.

Gemäß der vorliegenden Erfindung wird somit in vorteilhafter Weise eine Kopplung/Entkopplung eines Endlos-Beizvorgangs mit einem Kaltwalzvorgang möglich. Die erfindungsgemäße Anlage ermöglicht somit im entkoppelten Betrieb ein Endlos-Beizen ohne Kaltwalzvorgang und im gekoppelten Betrieb ein Endlos-Beizen mit unmittelbar anschließendem Kaltwalzen. Die erfindungsgemäße Anlage erlaubt dadurch eine vorteilhaft hohe Flexibilität hinsichtlich dieser möglichen Betriebsmodi auf nur einer Anlage.According to the present invention, coupling / decoupling of an endless pickling process with a cold rolling process is thus advantageously possible. The system according to the invention thus enables endless pickling in decoupled operation without a cold rolling process and, in coupled operation, endless pickling with immediately subsequent cold rolling. The system according to the invention thereby allows an advantageously high flexibility with regard to these possible operating modes on just one system.

In einer bevorzugten Ausführungsform weist der Kaltwalzbereich weiter eine Abrollvorrichtung zum Abrollen eines zu walzenden Metallbands auf, und Bandleitelemente, die so eingerichtet sind, dass in dem entkoppelten Betrieb ein zu walzendes Metallband von der Abrollvorrichtung des Kaltwalzbereichs dem Paar von Arbeitswalzen zum Walzen zugeführt werden kann. In dieser Weise wird zusätzlich im entkoppelten Betrieb ein Kaltwalzen ohne vorgeschaltetes Beizen möglich, was die Flexibilität der Anlage weiter erhöht.In a preferred embodiment, the cold rolling area also has an unwinding device for unrolling a metal strip to be rolled, and strip guide elements which are set up so that in the decoupled operation a metal strip to be rolled can be fed from the unwinding device of the cold rolling area to the pair of work rolls for rolling. In this way, in decoupled operation, cold rolling is also possible without upstream pickling, which further increases the flexibility of the plant.

In einer bevorzugten Ausführungsform weist der Beizbereich zumindest einen Bandspeicher auf, der eingerichtet ist, ein mit der Schweißvorrichtung zu einem Endlosband verbundenes Metallband zumindest teilweise zu speichern. Hierbei kann ein Bandspeicher, der zwischen der Schweißvorrichtung und der Beizvorrichtung angeordnet ist, verwendet werden, Differenzen zwischen einer Geschwindigkeit des die Schweißanlage verlassenden Metallbandes und einer Geschwindigkeit, mit welcher ein Metallband die Beizvorrichtung passieren kann, ausgleichen. Weiterhin kann ein Bandspeicher, der hinter der Beizvorrichtung und beispielsweise vor der Aufrollvorrichtung des Beizbereichs angeordnet ist, verwendet werden, im Bandspeicher gespeichertes gebeiztes Metallband mit größerer Geschwindigkeit aufzurollen, als Metallband die Beizvorrichtung verlässt. Auch der zumindest eine Bandspeicher trägt somit zur Flexibilität der Anlage bei und begünstigt insbesondere die Verwendung von Endlosmetallbändern.In a preferred embodiment, the pickling area has at least one strip store which is set up to at least partially store a metal strip connected to the welding device to form an endless strip. In this case, a strip storage device, which is arranged between the welding device and the pickling device, can be used to compensate for differences between a speed of the metal strip leaving the welding system and a speed at which a metal strip can pass the pickling device. Furthermore, a strip store, which is arranged behind the pickling device and, for example, in front of the roll-up device of the pickling area, can be used to roll up the pickled metal strip stored in the strip store at a higher speed than the metal strip leaves the pickling device. The at least one band storage device thus also contributes to the flexibility of the system and, in particular, favors the use of endless metal bands.

In einer bevorzugten Ausführungsform weist die Anlage weiter einen Übergangsbereich zwischen dem Beizbereich und dem Kaltwalzbereich auf. Dabei weist der Übergangsbereich Transportmittel, beispielsweise geeignete Lettische, zum Transportieren eines im Beizbereich gebeizten Endlosmetallbands zum Walzen in den Kaltwalzbereich auf. Der Übergangsbereich weist weiter eine Schweißvorrichtung auf, die eingerichtet ist, beim Umschalten in den gekoppelten Betrieb ein Kopfstück des gebeizten Endlosmetallbands mit einem Kopplungsbandstück zu verbinden. Das Kopplungsbandstück kann beispielsweise im Übergangsbereich platziert werden, um beim Umschalten in den gekoppelten Betrieb der Anlage ein Endlosband, das den Beizbereich passiert hat, geeignet in den Kaltwalzbereich und insbesondere zwischen das Paar von Arbeitswalzen zu bringen. Beispielsweise kann das Kopplungsband mit dem angehefteten Bandanfang/Kopfstück zwischen den Walzen des zumindest einen Paars von Walzen hindurchgeführt werden. Während dieses Einfädelvorgangs kann der Walzspalt zwischen dem Arbeitswalzenpaar auf Zieldicke eingestellt sein oder einen größeren Spalt aufweisen. Nach Passieren des Kopplungsbandes kann dieser direkt geschlossen werden. In beiden Fällen wird das eigentlich zu walzende Endlosband ohne nennenswerte Abmaßlängen gewalzt.In a preferred embodiment, the plant also has a transition area between the pickling area and the cold rolling area. The transition area has transport means, for example suitable Latvian tables, for transporting an endless metal strip pickled in the pickling area for rolling into the cold rolling area. The transition area also has a welding device which is set up to connect a head piece of the pickled endless metal strip to a coupling strip piece when switching to the coupled mode. The coupling band piece can be placed in the transition area, for example, in order to bring an endless band that has passed the pickling area into the cold rolling area and in particular between the pair of work rolls when switching to the coupled operation of the plant. For example, the coupling tape with the attached tape beginning / head piece can be passed between the rollers of the at least one pair of rollers. During this threading process, the roll gap between the work roll pair can be set to the target thickness or have a larger gap. After passing the coupling belt, it can be closed directly. In both cases, the endless strip that is actually to be rolled is rolled without any significant dimension lengths.

In einer bevorzugten Ausführungsform ist die Walzvorrichtung des Kaltwalzbereichs dazu eingerichtet, sowohl einen Endloswalzbetrieb als auch einen Batch-Walzbetrieb Walzbetrieb zu ermöglichen. In einer bevorzugten Ausführungsform ist die Walzvorrichtung des Kaltwalzbereichs dazu eingerichtet, sowohl einen Einwegwalzbetrieb als auch einen Reversierwalzbetrieb zu ermöglichen. In diesen Ausführungsformen kann der Kaltwalzbereich insbesondere für diese Betriebe geeignete Bandtransport- und Leitmittel aufweisen, wie auch eine entsprechend eingerichtete Steuereinheit zum entsprechenden manuellen und/oder automatisierten Betrieb.In a preferred embodiment, the rolling device of the cold rolling area is set up to enable both continuous rolling and batch rolling. In a preferred embodiment, the rolling device of the cold rolling area is set up to enable both a one-way rolling operation and a reversing rolling operation. In these embodiments, the cold rolling area can have strip transport and guide means suitable for these operations in particular, as well as a correspondingly set up control unit for the corresponding manual and / or automated operation.

In einer bevorzugten Ausführungsform ist die Walzvorrichtung des Kaltwalzbereichs dazu eingerichtet, sowohl einen Reduzierwalzbetrieb ls auch einen Dressierwalzbetrieb zu ermöglichen. Dazu sind vorzugsweise geeignete Walzensätze mit geeigneter Walzenrauhigkeit vorgesehen. Weitere Maßnahmen, wie z.B. das Abkoppeln von Walzensätzen vom Antrieb, eine Verringerung der Anstellkraft etc., sind vorzugsweise ebenfalls vorgesehen.In a preferred embodiment, the rolling device of the cold rolling area is set up to enable both a reducing rolling operation and a skin pass rolling operation. For this purpose, suitable roller sets with suitable roller roughness are preferably provided. Further measures, such as the uncoupling of roller sets from the drive, a reduction in the adjustment force, etc., are preferably also provided.

In bevorzugten Ausführungsformen kann die Anlage somit eingerichtet sein, die folgenden Betriebsarten jeweils gleichzeitig zu ermöglichen:

  1. a) Sowohl Endlos-Beizen ohne Kaltwalzvorgang / Kaltwalzen ohne vorgeschaltetes Beizen (Entkopplung von Beizeinrichtung und Kaltwalzeinrichtung) einerseits, als auch Endlos-Beizen mit unmittelbar anschließendem Walzen (gekoppelter Betrieb) andererseits;
  2. b) Sowohl Endlos-Walzen einerseits, als auch Batch oder Semi-Endlos Kaltwalzen andererseits (unterschiedliche Produktionsmodi des Kaltwalzbereichs);
  3. c) Sowohl Einwegwalzen einerseits, als auch Reversierwalzen andererseits (unterschiedliche Produktionsrichtungsmodi des Kaltwalzbereichs);
  4. d) Sowohl Reduzierwalzen einerseits, als auch Dressierwalzen andererseits (unterschiedliche Walzumformung innerhalb des Kaltwalzbereichs);
  5. e) Betriebe sowohl mit normalen Einzelbunden (Standardcoils) einerseits, als auch Betriebe mit Mehrfachbunden/Großbunden andererseits.
In preferred embodiments, the system can thus be set up to enable the following operating modes at the same time:
  1. a) Both endless pickling without cold rolling / cold rolling without upstream pickling (decoupling of the pickling device and cold rolling device) on the one hand, and endless pickling with subsequent rolling (coupled operation) on the other;
  2. b) Both endless rolling on the one hand and batch or semi-endless cold rolling on the other hand (different production modes of the cold rolling area);
  3. c) Both one-way rolls on the one hand and reversing rolls on the other (different production direction modes of the cold rolling area);
  4. d) Both reducing rolls on the one hand and skin pass rolls on the other (different roll forming within the cold rolling area);
  5. e) Companies with normal single coils (standard coils) on the one hand and companies with multiple coils / large coils on the other.

Vorzugsweise ermöglicht die Anlage mindestens drei der Betriebsarten a) bis e). Obwohl theoretisch technisch alle Betriebsarten a) bis e) von einer einzigen Anlage realisiert werden können, hat es sich als vorteilhaft erwiesen, die Anlage auf ein Wechseln zwischen drei der genannten fünf Betriebsarten zu beschränken. Es hat sich gezeigt, dass eine Kombination von drei der Betriebsarten a) bis e) eine wünschenswert flexible Anlage ermöglicht, wobei die Anlage dann aber gleichzeitig für die Praxis tauglich, und auch aus produktionstechnischer Sicht und hinsichtlich der Bund-Logistik vorteilhaft ist.The system preferably enables at least three of the operating modes a) to e). Although theoretically all operating modes a) to e) can be implemented by a single system, it has proven advantageous to limit the system to changing between three of the five operating modes mentioned. It has been shown that a combination of three of the operating modes a) to e) enables a desirable flexible system, but the system is then at the same time suitable for practice and is also advantageous from a production point of view and with regard to federal logistics.

In bevorzugten Ausführungsformen ist die Anlage (vorzugsweise der Kaltwalzbereich mit eigener zugeordneter Abrollvorrichtung und Aufrollvorrichtung) ausgelegt, Mehrfachbunde einer Bundgröße von drei Standardcoils (ca. 30-35 to, bis zu 25 kg/mm spez. Gewicht), also in Summe von etwa 100 to, zu bearbeiten. Es hat sich herausgestellt, dass so eine erforderliche Standstabilität erreicht wird, wobei eine Einschnürung bei Aufwickelvorgängen innerhalb akzeptabler Toleranzen bleibt.In preferred embodiments, the system (preferably the cold rolling area with its own assigned unwinding device and winding device) is designed, multiple coils with a coil size of three standard coils (approx. 30-35 to, up to 25 kg / mm spec. Weight), i.e. a total of around 100 tons. It has been found that the required stability is achieved in this way, with a constriction during winding processes remaining within acceptable tolerances.

Die vorliegende Erfindung stellt weiter ein Verfahren zum Beizen und/oder Kaltwalzen von Metallbändern auf einer Anlage bereit, wie sie im Vorangehenden beschrieben wurde. Das Verfahren weist zunächst ein Einstellen der Bandleitelemente auf, so dass die Anlage in dem gekoppelten Betrieb arbeiten kann. Beispielsweise kann eine dem Kaltwalzbereich in Produktionsrichtung vorgeschaltete Bandweiche so eingestellt werden, dass ein Endlosmetallband nach einem Beizen vom Beizbereich über die Bandweiche dem Kaltwalzbereich zugeführt werden kann. Der Schritt des Einstellens der Bandleitelemente kann zu jedem geeigneten Zeitpunkt während des Verfahrens ausgeführt werden.The present invention further provides a method for pickling and / or cold rolling metal strips on a plant as described above. The method initially involves setting the strip guide elements so that the system can work in the coupled mode. For example, a strip switch upstream of the cold rolling area in the production direction can be set in such a way that, after pickling, an endless metal strip can be fed from the pickling area via the strip switch to the cold rolling area. The step of adjusting the strip guiding elements can be carried out at any suitable point in time during the process.

Das Verfahren weist weiter einen Schritt des Zuführens eines Endlosmetallbands zu der Beizvorrichtung des Beizbereichs und einen Schritt des Beizens des Endlosmetallbands mit der Beizvorrichtung auf. Das Verfahren weist einen Schritt des Transportierens des gebeizten Endlosmetallbands in den Kaltwalzbereich auf. Das Verfahren weist einen Schritt des Walzens des gebeizten Endlosmetallbands mit dem zumindest einen Paar von Arbeitswalzen auf. Weiter weist das Verfahren einen Schritt des Aufrollens des gebeizten und gewalzten Endlosmetallbands mit der Aufrollvorrichtung des Kaltwalzbereichs auf. Hierbei wird das gewalzte Endlosband beispielsweise so aufgerollt, dass Abschnitte des Endlosbands beispielsweise zu Standardcoils oder Großbunden aufgerollt werden, die dann jeweils vom verbleibenden Endlosband abgetrennt und einzeln abtransportiert werden. Mit dem Verfahren können somit im Endlosbetrieb Coils von gebeizten und gewalzten Metallbändern hergestellt werden.The method further comprises a step of feeding an endless metal strip to the pickling device of the pickling area and a step of pickling the endless metal strip with the pickling device. The method has a step of transporting the pickled endless metal strip into the cold rolling area. The method includes a step of rolling the pickled endless metal strip with the at least one pair of work rolls. Furthermore, the method has a step of rolling up the pickled and rolled endless metal strip with the winding device of the cold rolling area. Here, the rolled endless belt is rolled up, for example, in such a way that sections of the endless belt are rolled up into standard coils or large coils, for example, which are then separated from the remaining endless belt and transported away individually. The process can thus be used to manufacture coils of pickled and rolled metal strips in continuous operation.

In einer bevorzugten Ausführungsform weist der Kaltwalzbereich weiter eine Abtrennvorrichtung, beispielsweise eine Schere, auf, die in Produktionsrichtung hinter dem zumindest einen Paar von Arbeitswalzen angeordnet ist. Dann weist in einer bevorzugten Ausführungsform das Verfahren einen Schritt des Verbindens eines Kopfstücks des gebeizten Endlosmetallbands mit dem Kopplungsbandstück im Übergangsbereich auf. Das Verfahren weist weiter einen Schritt des Führens des Kopplungsbandstücks durch das zumindest eine Paar von Arbeitswalzen auf. Diese sind vorzugsweise jedoch nicht notwendigerweise so voneinander beabstandet, dass das Kopplungsband nicht gewalzt, also mit einer entsprechenden Kraft beaufschlagt, wird. Das Verfahren weist weiter einen Schritt des Abtrennens des Kopplungsbandstücks mit der Abtrennvorrichtung von dem Endlosmetallband, auf, nachdem das Kopplungsbandstück durch das zumindest eine Paar von Arbeitswalzen hindurchgeführt wurde. Das Verfahren weist vorzugsweise weiter einen Schritt des Positionierens eines Walzabstandes des zumindest einen Paars von Walzen, so dass das auf das Kopplungsstück folgende Endlosband auf Zieldicke gewalzt wird.In a preferred embodiment, the cold rolling area also has a severing device, for example a pair of scissors, which is arranged behind the at least one pair of work rolls in the production direction. Then, in a preferred embodiment, the method has a step of connecting a head piece of the pickled endless metal strip to the coupling strip piece in the transition area. The method further has a step of guiding of the coupling tape piece by the at least one pair of work rolls. These are preferably, but not necessarily, spaced from one another in such a way that the coupling belt is not rolled, that is to say is subjected to a corresponding force. The method further comprises a step of severing the coupling tape piece with the severing device from the endless metal tape after the coupling tape piece has been passed through the at least one pair of work rolls. The method preferably further comprises a step of positioning a rolling distance of the at least one pair of rolls so that the endless strip following the coupling piece is rolled to the target thickness.

In einer bevorzugten Ausführungsform weist das Verfahren weiter ein Einstellen der Bandleitelemente auf, so dass die Anlage in dem entkoppelten Betrieb arbeiten kann. Beispielsweise kann dazu eine dem Kaltwalzbereich in Produktionsrichtung vorgeschaltete Bandweiche so eingestellt werden, dass ein Endlosmetallband nach einem Beizen vom Beizbereich über die Bandweiche dem Kaltwalzbereich nicht zugeführt werden kann, sondern der Aufrollvorrichtung des Beizbereichs zugeführt werden kann. Der Schritt des Einstellens der Bandleitelemente kann zu jedem geeigneten Zeitpunkt während des Verfahrens ausgeführt werden, um die strukturell eigenständigen Bereiche der Beize und des Kaltwalzwerks zu koppeln oder entkoppeln.In a preferred embodiment, the method further includes setting the strip guide elements so that the system can work in the decoupled mode. For example, a strip switch upstream of the cold rolling area in the production direction can be set in such a way that an endless metal strip after pickling cannot be fed from the pickling area via the strip switch to the cold rolling area, but can be fed to the winding device of the pickling area. The step of adjusting the strip guide elements can be carried out at any suitable point in time during the process in order to couple or decouple the structurally independent areas of the pickling line and the cold rolling mill.

Das Verfahren weist weiter ein Zuführen eines Endlosmetallbands zu der Beizvorrichtung des Beizbereichs, ein Beizen des Endlosmetallbands mit der Beizvorrichtung, und ein Aufrollen zumindest eines Teils von gebeiztem Endlosmetallband mit der Aufrollvorrichtung des Beizbereichs. Hierbei wird das gebeizte Endlosband beispielsweise so teilweise aufgerollt, dass Abschnitte des Endlosbands beispielsweise zu Standardcoils oder Großbunden aufgerollt werden, die dann jeweils vom verbleibenden Endlosband abgetrennt und einzeln abtransportiert werden. Dazu weist der Beizbereich vorzugsweise eine geeignete Trennvorrichtung, beispielsweise eine Schere, auf, die der Beizvorrichtung in Produktionsrichtung nach- und der Aufrollvorrichtung des Beizbereichs vorgeschaltet ist. Mit dem Verfahren können somit im Endlosbetrieb Coils von gebeizten nicht durch die Anlage selbst gewalzten Metallbändern hergestellt werden.The method further comprises feeding an endless metal strip to the pickling device of the pickling area, pickling the endless metal strip with the pickling device, and rolling up at least part of the pickled endless metal strip with the winding device of the pickling area. Here, the pickled endless belt is partially rolled up, for example, in such a way that sections of the endless belt are rolled up into standard coils or large coils, for example, which are then separated from the remaining endless belt and transported away individually. For this purpose, the pickling area preferably has a suitable separating device, for example a pair of scissors, which is connected after the pickling device in the production direction and upstream of the winding device of the pickling area. With the method, coils of pickled metal strips that are not rolled by the plant itself can thus be produced in continuous operation.

In einer bevorzugten Ausführungsform weist das Verfahren vor dem Schritt des Zuführens des Endlosmetallbands aus dem Beizbereich zum Walzbereich ein Platzieren des Kopplungsbandstücks in dem Übergangsbereich auf. Dadurch wird es vorteilhaft möglich, dass das Kopplungsband nach einem entkoppelten reinen Beizbetrieb für einen gekoppelten Beiz/Walz-Betrieb wieder direkt zur Verfügung steht, und beispielsweise nicht zwischengelagert werden muss.In a preferred embodiment, the method includes, before the step of feeding the endless metal strip from the pickling area to the rolling area, the coupling band piece is placed in the transition area. This advantageously makes it possible for the coupling belt to be directly available again after a decoupled pure pickling operation for a coupled pickling / rolling operation and, for example, does not have to be temporarily stored.

Die im Vorangehenden beschriebene Anlage zum Endlosbeizen und/oder Kaltwalzen von Metallbändern und das damit verbundene Verfahren ermöglichen die Herstellung

  • gebeizter und geölter Bänder (ohne Walzvorgang), oder die Herstellung
  • gebeizter und kaltgewalzter Bänder, oder die Herstellung
  • gebeizter und kaltgewalzter und dressierter Bänder
    wahlweise
  • im Endlosbetrieb oder
  • im Semi-Endlos-Betrieb oder
  • im Batch-Betrieb
    wahlweise mit
  • Standard-Bund (ca. 30 to Bundgewicht)
  • bis zu dreifachem Standard-Bundgewicht, max. ca. 100 to Bundgewicht (Jumbo-Coil) (beispielsweise in Semi-Endlos-Produktion)
    auf ein und derselben Anlage
The above-described plant for endless pickling and / or cold rolling of metal strips and the associated process enable production
  • pickled and oiled strips (without rolling), or the production
  • pickled and cold-rolled strips, or the manufacture
  • Pickled and cold-rolled and passivated strips
    optional
  • in endless operation or
  • in semi-endless operation or
  • in batch operation
    optionally with
  • Standard bundle (approx. 30 to bundle weight)
  • Up to three times the standard bundle weight, max. approx. 100 to bundle weight (jumbo coil) (for example in semi-endless production)
    on the same system

Vorzugsweise kann die Anlage zwischen

  • Einwegwalzbetrieb
  • und Reversierwalzbetrieb
Umschalten.Preferably, the plant between
  • One-way rolling operation
  • and reversing rolling operation
Switch.

Es wird so möglich, dass auf begrenztem Raum ein hochflexibles Anlagenkonzept realisiert werden kann, das viele verschiedene Produktionsmodi miteinander kombinieren kann, für die bislang unterschiedliche Anlagen vorzusehen waren.It is thus possible that a highly flexible system concept can be implemented in a limited space, which can combine many different production modes with one another, for which previously different systems had to be provided.

4. Beschreibung der bevorzugten Ausführungsformen4. Description of the Preferred Embodiments

Ausführungsformen der Erfindung sind in den Figuren dargestellt und werden im Folgenden näher erläutert.Embodiments of the invention are shown in the figures and are explained in more detail below.

Es zeigenShow it

  • Figur 1 eine schematische Seitenansicht einer Anlage zum Endlosbeizen und/oder Kaltwalzen von Metallbändern; und Figure 1 a schematic side view of a plant for endless pickling and / or cold rolling of metal strips; and
  • Figur 2 eine schematische Draufsicht einer Anlage zum Endlosbeizen und/oder Kaltwalzen von Metallbändern. Figure 2 a schematic plan view of a plant for endless pickling and / or cold rolling of metal strips.

Mit Bezug auf die Figuren 1 und 2 wird eine Anlage beschrieben, die in einem entkoppelten Betrieb sowohl ein Endlosbeizen eines Endlosmetallbands als auch ein Kaltwalzen eines Metallbands erlaubt, und die in einem gekoppelten Betrieb ein Endlosbeizen eines Endlosmetallbands und ein anschließendes Kaltwalzen des gebeizten Endlosbands ermöglicht.With reference to the Figures 1 and 2 a system is described which allows both continuous pickling of an endless metal strip and cold rolling of a metal strip in a decoupled operation, and which enables continuous pickling of an endless metal strip and subsequent cold rolling of the pickled endless strip in a coupled operation.

Wie in Fig. 1 dargestellt, untergliedert sich die Anlage in einen Beizbereich A, einen Kaltwalzbereich B und einen Übergangsbereich C, der sich zwischen dem Beizbereich A und dem Kaltwalzbereich B befindet. Die folgende Beschreibung konzentriert sich auf wesentliche Komponenten der Anlage. Der Übersichtlichkeit halber wird auf eine Beschreibung von gegebenenfalls vorgesehenen Tischen, Umlenkrollen, Bridle, Treibrollen, Medienanlagen, Transportwagen etc. verzichtet.As in Fig. 1 shown, the plant is divided into a pickling area A, a cold rolling area B and a transition area C, which is located between the pickling area A and the cold rolling area B. The following description focuses on the main components of the system. For the sake of clarity, any tables, pulleys, bridle, drive rollers, media systems, transport trolleys, etc. that may be provided are not described.

Im Beizbereich A umfasst die Anlage eine Abwickeleinheit (Abrollvorrichtung) 1 beispielsweise für Standardcoils oder Standardbunde (z.B. ca. 30 to Bundgewicht). Die Abwickeleinheit 1 kann aber auch für Großbunde oder Jumbo-Coils (beispielsweise bis ca. 100 to Bundgewicht) ausgelegt sein, was der Anlage in dieser Hinsicht größere Flexibilität ermöglicht. Die Anlage umfasst weiter eine Schweißmaschine (Schweißvorrichtung) 2 zum Verbinden von Einzelbändern, die von der Abwickeleinheit 1 abgewickelt werden, zu einem endlosen Band. Die Anlage umfasst weiter einen Bandspeicher 3, eine Beizvorrichtung 4, einen weiteren Bandspeicher 5, eine Trenneinrichtung (z. B. eine Schere) 6, sowie eine Aufwickeleinheit (Aufrollvorrichtung) 7 und ein Bandleitelement in Form einer Bandweiche 8.In the pickling area A, the system comprises an unwinding unit (unwinding device) 1, for example for standard coils or standard coils (eg approx. 30 to coil weight). The unwinding unit 1 can, however, also be designed for large coils or jumbo coils (for example up to approx. 100 to coil weight), which enables the system to be more flexible in this regard. The system further comprises a welding machine (welding device) 2 for connecting individual strips, which are unwound from the unwinding unit 1, to form an endless strip. The system further comprises a strip store 3, a pickling device 4, a further strip store 5, a separating device (e.g. scissors) 6, as well as a winding unit (reeling device) 7 and a strip guide element in the form of a strip switch 8.

Die Aufwickeleinheit 7 kann alternativ eine oder zwei Haspeln umfassen, oder auch als Wendehaspel vorgesehen werden. Vorzugsweise kann die Aufwickeleinheit 7 ausgelegt sein, Standardcoils zu produzieren, was ein einfaches Abdienen ermöglicht und ein externes Trennen von Großbunden vermeidet. Die Bandweiche 8 ist ein Beispiel eines Bandleitelements, das vorgesehen werden kann, um in einem entkoppelten Betrieb der Anlage ein gebeiztes Endlosband der Aufwickeleinheit 7 zuzuführen, wenn kein anschließender Kaltwalzvorgang vorgesehen ist. Damit dient die Bandweiche der Kopplung/Entkopplung der strukturell eigenständigen Bereiche der Beize und des Kaltwalzwerks.The winding unit 7 can alternatively comprise one or two reels, or it can also be provided as a turning reel. The winding unit 7 can preferably be designed to produce standard coils, which enables simple serving and avoids external separation of large coils. The strip switch 8 is an example of a strip guide element which can be provided in order to feed a pickled endless strip to the winding unit 7 in a decoupled operation of the system if no subsequent cold rolling process is planned. The strip switch serves to couple / decouple the structurally independent areas of the pickling line and the cold rolling mill.

Ein von der Aufwickeleinheit 7 aufgerollter Bund oder Coil kann von dort geeignet abtransportiert werden. Die erfindungsgemäße Anlage ermöglicht somit im entkoppelten Betrieb ein Herstellen von endlosgebeiztem nicht gewalztem Metallband. In diesem Betrieb sind der Beizbereich A und der Kaltwalzbereich B entkoppelt.A bundle or coil rolled up by the winding unit 7 can be suitably transported away from there. The system according to the invention thus enables the production of continuously pickled, non-rolled metal strip in decoupled operation. In this operation, the pickling area A and the cold rolling area B are decoupled.

In einer bevorzugten Ausführungsform ist es möglich, dass während einer Kopplung von Beizbereich A mit dem Kaltwalzbereich B (im gekoppelten Betrieb der Anlage) ein Walzenwechsel durchgeführt wird, oder werden kann. Wie in der Figur schematisch gezeigt, ist für diese Möglichkeit, jedenfalls für den erforderlichen Zeitraum, optional ein weiterer Bandspeicher 9 vorgesehen, der bevorzugt zwischen der Trenneinrichtung 6 und der Aufwickeleinheit 7 angeordnet sein kann, bzw. der Bandspeicher 5 wird entsprechend größer ausgelegt.In a preferred embodiment, it is possible that a roll change is or can be carried out during a coupling of the pickling area A with the cold rolling area B (in the coupled operation of the plant). As shown schematically in the figure, a further tape store 9 is optionally provided for this possibility, at least for the required period of time, which can preferably be arranged between the separating device 6 and the winding unit 7, or the tape store 5 is designed correspondingly larger.

Um den Beizbereich A mit dem Kaltwalzbereich B zu koppeln, sind geeignete Bandleitelemente vorgesehen, so dass ein gebeiztes Endlosband z.B. über geeignete Leittische vom Beizbereich A in den Kaltwalzbereich B transportiert werden kann. Auch können dazu im Übergangsbereich C geeignete Bandtransporteinrichtungen vorgesehen sein.In order to couple the pickling area A with the cold rolling area B, suitable strip guide elements are provided so that a pickled endless strip can be transported from the pickling area A to the cold rolling area B via suitable guide tables, for example. Suitable tape transport devices can also be provided in the transition area C for this purpose.

Kaltwalzbereich B umfasst eine Abwickeleinheit (Abrollvorrichtung) 10 beispielsweise für Standardcoils oder Großbunde und eine Walzvorrichtung, die ein oder mehrere Walzgerüste 11 umfasst. Die Walzgerüste 11 weisen jeweils mindestens ein Paar von Arbeitswalzen 11a, 11b auf, die die Umformarbeit, bzw. die Dressierarbeit durchführen. Im Auslauf des Kaltwalzbereichs B ist eine weitere Trenneinrichtung 12 (z. B. in Form einer Schere 12), sowie eine Aufwickeleinheit (Aufrollvorrichtung) 13 vorgesehen. Die Aufwickeleinheit 13 kann ebenfalls für Standardcoils oder Großbunde ausgelegt sein, so dass die Anlage vorzugsweise sowohl für einen Betrieb mit Standardcoils als auch für einen Betrieb mit Großbunden ausgelegt sein kann. Vorzugsweise kann eine einzige Anlage beide Betriebe ermöglichen. Die Zudienung und Abdienung der Bunde kann auf verschiedene Weisen geschehen, welche weiter unten beschrieben werden.Cold rolling area B comprises an unwinding unit (unwinding device) 10, for example for standard coils or large coils, and a rolling device which comprises one or more roll stands 11. The roll stands 11 each have at least one pair of work rolls 11a, 11b which carry out the forming work or the skin pass work. In the outlet of the cold rolling area B, a further separating device 12 (for example in the form of a pair of scissors 12) and a winding unit (reeling device) 13 are provided. The winding unit 13 can also be designed for standard coils or large coils, so that the system can preferably be designed both for operation with standard coils and for operation with large coils. A single system can preferably enable both operations. The covenants can be served in various ways, which are described below.

Durch das Vorsehen der eigenständigen Abwickeleinheit 10 ist es möglich, dass mit der Anlage auch vorgebeizte Bunde z.B. von anderen Anlagen zugedient werden können, um sie mit der gezeigten Anlage (nur) kalt zu walzen. Bei einem konsequenten Einwegbetrieb der Anlage ist es weiterhin auch möglich, dass bereits mit der gezeigten Anlage einmal gewalzte Bunde erneut der Abwickeleinheit 10 zugeführt werden können um erneut gewalzt zu werden (Back-to-Back-Walzen).By providing the independent unwinding unit 10, it is possible that the system can also be used to supply pre-pickled coils, e.g. from other systems, in order to (only) cold-roll them with the system shown. With consistent one-way operation of the system, it is also possible that coils that have already been rolled once with the system shown can be fed back to the unwinding unit 10 in order to be rolled again (back-to-back rolling).

Alternativ oder zusätzlich kann der Kaltwalzbereich B auch als Reversieranlage ausgeführt werden. Beispielsweise kann dann ein erster Walzdurchlauf in einem Endlos-Modus erfolgen und ein nachfolgender Walzdurchlauf kann dann ein Reversiervorgang in einem Batch oder Semi-Endlos-Modus sein. In diesem Falle hat es sich als vorteilhaft herausgestellt, wenn die Walzvorrichtung 11 aus maximal zwei Walzgerüsten besteht, da bei drei oder mehr Gerüsten der Reversierwalzvorgang hinsichtlich der technischen Steuerung, der üblichen Stichfolgen, sowie der Abmaßlängen unerwünschte Effekte mit sich bringen kann.Alternatively or additionally, the cold rolling area B can also be designed as a reversing system. For example, a first rolling pass can then take place in an endless mode and a subsequent rolling pass can then be a reversing process in a batch or semi-endless mode. In this case, it has been found to be advantageous if the rolling device 11 consists of a maximum of two roll stands, since with three or more stands the reversing rolling process can have undesirable effects in terms of technical control, the usual stitch sequences and the dimension lengths.

Für den Reversierwalzvorgang sind erweiterte Bandspeicherkapazitäten vorzuhalten, um das in diesem Zeitraum gebeizte Band aufzunehmen. Dazu wird entweder der Bandspeicher 5 vergrößert oder ein weiterer Bandspeicher 9 vorgesehen.For the reversing rolling process, extended strip storage capacities are to be kept available in order to accommodate the strip pickled during this period. For this purpose, either the tape storage device 5 is enlarged or a further tape storage device 9 is provided.

Der Reversiervorgang bedeutet eine Entkopplung des Bereichs des Kaltwalzwerks B vom Beizbereich A. Bei Wiederaufnahme des gekoppelten Betriebs muss das Bandleitelement in Form der Bandweiche so eingestellt werden, dass die Anlage im gekoppelten Betrieb arbeiten kann. Bevorzugt wird das Kopfstück des neuen gebeizten und noch zu walzenden Endlosbandes mit dem im Übergangsbereich platzierten Kopplungsband verschweißt, um anschließend im Kaltwalzwerk gewalzt zu werden.The reversing process means a decoupling of the area of the cold rolling mill B from the pickling area A. When the coupled operation is resumed, the strip guide element in the form of the strip switch must be set so that the plant can work in coupled operation. The head piece of the new pickled endless strip that is still to be rolled is preferably welded to the coupling strip placed in the transition area in order to be subsequently rolled in the cold rolling mill.

Für ein Verwenden von Großbunden im Kaltwalzbereich B hat es sich als vorteilhaft bezüglich der Standsicherheit erwiesen, ein Transportsystem mit Paletten (14) anstelle eines Transportsystems mit Bundhubwagen oder Hubbalkenförderern zu verwenden. Ein solches System ist im Kaltwalzbereich B in Fig. 2 skizziert. Dieses Paletten-Transportsystem (14) im Bereich B ist ebenfalls von Vorteil, wenn die Anlage ausschließlich im Einwegbetrieb (beispielsweise nur in der in der Figur angedeuteten Produktionsrichtung) betrieben wird, da es ein komfortables Umlaufsystem für das oben beschriebene Back-to-Back-Walzen ermöglicht. Da das Paletten-Transportsystem aber auch gleichermaßen in einem Reversierbetrieb eingesetzt werden kann, hat es sich als besonders geeignet für die Anlage erwiesen, die somit flexibel in einem Einwegbetrieb und einem Reversierbetrieb betrieben werden kann. Insbesondere beim Wickeln von Großbunden und auch beim Bundhandling, sowie beim Walzen dünner Enddicken wird vorzugsweise der Einsatz von entsprechenden Hülsen vorgesehen. Dies dient einer erhöhten Sicherheit. Aus Gründen der Übersichtlichkeit ist dies in den Figuren nicht dargestellt.For the use of large coils in the cold rolling area B, it has proven to be advantageous in terms of stability to use a transport system with pallets (14) instead of a transport system with coil lift trucks or walking beam conveyors. Such a system is in the cold rolling area B in Fig. 2 outlined. This pallet transport system (14) in area B is also advantageous if the system is operated exclusively in one-way mode (for example only in the production direction indicated in the figure), since it is a convenient circulation system for the back-to-back described above. Rolling enabled. Since the pallet transport system can also be used in reversing operation, it has proven to be particularly suitable for the system, which can thus be operated flexibly in one-way operation and reversing operation. Particularly when winding large bundles and handling bundles, as well as when rolling thin end thicknesses, the use of appropriate sleeves is preferably provided. This is used for increased security. For the sake of clarity, this is not shown in the figures.

Insbesondere, wenn im Kaltwalzbereich B keine Großbunde verarbeitet werden sollen, kann alternativ die Bundlogistik beispielsweise über Bundhubwagen 15 erfolgen. Eine solche Bundlogistik ist in Fig. 2 beispielhaft im Beizbereich A anhand von Bundtransport 15a und 15b skizziert. Hierbei werden einzelne Bunde/Standardcoils auf einem Bundhubwagen 15a zur Abwickeleinheit 1 transportiert, bzw. von der Aufwickeleinheit 7 wegtransportiert (mit Bundhubwagen 15b).In particular, if no large coils are to be processed in the cold rolling area B, coil logistics can alternatively take place, for example, using coil lift trucks 15. Such bundle logistics are in Fig. 2 sketched by way of example in pickling area A using coil transport 15a and 15b. Here, individual bundles / standard coils are transported on a bundle lift truck 15a to the unwinding unit 1 or transported away from the winding unit 7 (with a bundle lift truck 15b).

Wie in Fig. 1 gezeigt, ist in der dargestellten Anlage zwischen dem Beizbereich A und dem Kaltwalzbereich B ein Übergangsbereich C angeordnet. Ein solcher Übergangsbereich C kann insbesondere vorgesehen sein, wenn die dargestellte Anlage als Modernisierung einer schon bestehenden Anlage vorgesehen wird oder die baulichen Voraussetzungen größere Abstände erzwingen. Hierbei kann die Übergangseinrichtung C eine größere räumliche Entfernung (beispielsweise mehr als 20 m) zwischen dem Beizbereich A und dem Kaltwalzbereich B überbrücken. Wenn die Anlage im gekoppelten Betrieb betrieben wird, kann ein gebeiztes Band ohne weitere Arbeitsschritte durch den Übergangsbereich C in den Kaltwalzbereich B geführt werden, um dort umgeformt zu werden.As in Fig. 1 As shown, a transition area C is arranged between the pickling area A and the cold rolling area B in the plant shown. Such a transition area C can be provided in particular if the system shown is intended as a modernization of an existing system or if the structural requirements require greater distances. Here can the transition device C bridges a greater spatial distance (for example more than 20 m) between the pickling area A and the cold rolling area B. If the plant is operated in coupled operation, a pickled strip can be passed through the transition area C into the cold rolling area B without further work steps, in order to be reshaped there.

Bei einem Schalten von einem entkoppelten zu einem gekoppelten Betrieb kann der Übergangsbereich wie folgt verwendet werden. Wie in Fig. 1 gezeigt, ist im Übergangsbereich C eine Schweißmaschine 20 angeordnet. Ein Kopplungsbandstück 21, welches in etwa der Länge des Übergangsbereichs C entspricht, kann in diesen Bereich platziert sein. Die Schweißmaschine 20 kann dann verwendet werden, um ein dem Beizbereich A zugewandtes Ende des Kopplungsbandes 21 mit einem Kopfstück (oder Bandanfang) eines aus dem Beizbereich A in den Übergangsbereich C geführten gebeizten Endlosmetallbands zu verbinden. Das Kopplungsband mit dem angehefteten Bandanfang wird dann durch die Walzgerüste 11 (zwischen den Walzen der Walzenpaare 11a, 11b) hindurchgeführt. Dabei kann ein Walzspalt zwischen den Walzen der Walzenpaare 11a, 11b nach einem Passieren des Kopplungsbandes 21 direkt geschlossen werden, so dass das eigentlich zu walzende Endlosmetallband ohne nennenswerte Abmaßlängen gewalzt werden kann. Das Durchführen des Kopplungsbandes 21 ohne Dickenreduktion durch die Walzgerüste (11) hat den Vorteil, dass das Kupplungsband häufiger eingesetzt werden kann, ehe es verschrottet wird. Außerdem kann die Dicke unabhängig vom Endlosband gewählt werden. Es ist jedoch nicht zwingend notwendig.When switching from a decoupled to a coupled operation, the transition range can be used as follows. As in Fig. 1 As shown, a welding machine 20 is arranged in the transition area C. A coupling band piece 21, which corresponds approximately to the length of the transition area C, can be placed in this area. The welding machine 20 can then be used to connect an end of the coupling band 21 facing the pickling area A to a head piece (or beginning of the band) of a pickled endless metal strip guided from the pickling area A into the transition area C. The coupling tape with the beginning of the tape attached is then passed through the roll stands 11 (between the rolls of the roll pairs 11a, 11b). A roll gap between the rolls of the roll pairs 11a, 11b can be closed directly after passing the coupling belt 21, so that the endless metal strip actually to be rolled can be rolled without any appreciable dimensional lengths. Passing the coupling belt 21 through the roll stands (11) without reducing the thickness has the advantage that the coupling belt can be used more frequently before it is scrapped. In addition, the thickness can be selected independently of the endless belt. However, it is not absolutely necessary.

Das Kopplungsband 21 kann beispielsweise auf Aufwickeleinheit 13 angewickelt werden und bei Passieren einer Trenneinrichtung 12 (beispielsweise einer Schere 12) vom nachfolgenden Endlosmetallband abgetrennt werden, um separat ausgefördert zu werden. Anschließend wird das eigentliche Walzgut auf Zieldicke gewalzt und mit Aufwickeleinheit 13 aufgewickelt.The coupling belt 21 can be wound onto the winding unit 13, for example, and when it passes a separating device 12 (for example a pair of scissors 12) it can be separated from the subsequent endless metal belt in order to be conveyed out separately. The actual rolling stock is then rolled to the target thickness and wound up with the winding unit 13.

Um hierbei Nebenzeiten zu sparen, kann die Aufwickeleinheit 13 aus zwei Haspeln, einem Wendehaspel oder auch einem Haspel und einem Pup-Coil-Haspel einfacher Bauart bestehen. Eine der Haspeln oder der Pup-Coil-Haspel können dann verwendet werden, das Kopplungsband zu wickeln während der (Haupt-)Haspel weiter zum Aufwickeln des gebeizten und gewalzten Endlosmetallbands zur Verfügung steht (Diese Lösung ist nicht in den Figuren gezeigt). Das Pup-Coil mit dem Kopplungsband 21 kann dann wieder dem Beizbereich A zur Wiederverwertung zugeführt werden. Beispielsweise kann das Kopplungsband dem Beizbereich A dann zugeführt werden, wenn ein letztes Band im gekoppelten Betriebsmodus der Anlage die Beizeinrichtung A passiert. Das Kopplungsband 21 kann dann zwischen dem Ende des letzten Bandes des gekoppelten Betriebs, das im gekoppelten Betriebsmodus gewalzt wird, und einem Anfang eines nachfolgenden ersten Bandes des entkoppelten Betriebsmodus geschweißt werden, um mit diesen Bändern in Produktionsrichtung transportiert zu werden. Um das Kopplungsband 21 im Übergangsbereich C wieder abzutrennen, sind am Ende des Beizbereichs A eine Trennvorrichtung 6, und am Anfang des Kaltwalzbereichs B in der Nähe der Abwickeleinheit 10 (funktional noch zum Übergangsbereich C gehörend) eine Trennvorrichtung 23 vorgesehen. Das Kopplungsband 21 kann somit vor und nach dem Bereich C mittels der Trennvorrichtungen 6 und 23, beispielsweise mittels zweier Scheren, herausgeschnitten werden, um bis zur nächsten Kopplung im Bereich C zu verbleiben. Die Schere 6 des Beizbereichs A kann im entkoppelten Betrieb verwendet werden, Abschnitte von gebeiztem Endlosband, die auf die Aufrollvorrichtung 7 aufgerollt wurden, vom verbleibenden Endlosband abzutrennen, um so Coils von gebeiztem, nicht gewalztem Metallband herzustellen.In order to save non-productive times, the winding unit 13 can consist of two reels, a turning reel or also a reel and a pup-coil reel of a simple design. One of the reels or the pup coil reel can then be used to wind the coupling tape during the The (main) reel is also available for winding up the pickled and rolled endless metal strip (this solution is not shown in the figures). The pup coil with the coupling belt 21 can then be returned to the pickling area A for recycling. For example, the coupling strip can be fed to the pickling area A when a last strip passes the pickling device A in the coupled operating mode of the system. The coupling belt 21 can then be welded between the end of the last belt of the coupled operation, which is rolled in the coupled operating mode, and a beginning of a subsequent first belt of the decoupled operating mode, in order to be transported with these belts in the production direction. In order to separate the coupling strip 21 again in the transition area C, a separating device 6 is provided at the end of the pickling area A, and a separating device 23 is provided at the beginning of the cold rolling area B near the unwinding unit 10 (still functionally part of the transition area C). The coupling band 21 can thus be cut out before and after the area C by means of the separating devices 6 and 23, for example by means of two scissors, in order to remain in the area C until the next coupling. The scissors 6 of the pickling area A can be used in decoupled operation to separate sections of pickled endless strip, which have been rolled up onto the reeling device 7, from the remaining endless strip in order to produce coils of pickled, non-rolled metal strip.

Im entkoppelten Betrieb kann der Kaltwalzbereich B im Einweg/Batch- oder Reversierbetrieb weitere Walzaufgaben erfüllen. Der Kaltwalzbereich B kann zwischen Reduzierbetrieb und Dressierbetrieb umschalten. Dazu sind insbesondere entsprechende Walzensätze mit geeigneter Walzenrauhigkeit vorgesehen. Weitere Maßnahmen, wie z.B. ein Abkoppeln von Walzensätzen vom Antrieb, eine Verringerung der Anstellkraft etc, können konstruktiv vorgesehen werden. Konzeptionell kann bei entsprechender Produktionsfolge sogar ein DCR (Double Cold Reduction Mill)-Betrieb möglich sein.In decoupled operation, the cold rolling area B can perform further rolling tasks in one-way / batch or reversing operation. The cold rolling area B can switch between reduced operation and skin pass operation. For this purpose, in particular, appropriate roller sets with a suitable roller roughness are provided. Further measures, such as decoupling sets of rollers from the drive, reducing the adjustment force, etc., can be provided constructively. Conceptually, with the appropriate production sequence, DCR (Double Cold Reduction Mill) operation may even be possible.

BezugszeichenlisteList of reference symbols

AA.
BeizbereichPickling area
BB.
KaltwalzbereichCold rolling area
CC.
ÜbergangsbereichTransition area
11
Abrollvorrichtung (Abwickeleinheit)Unwinding device (unwinding unit)
22
Schweißvorrichtung (Schweißmaschine)Welding device (welding machine)
33
BandspeicherTape storage
44th
BeizvorrichtungPickling device
55
BandspeicherTape storage
66th
Trenneinrichtung z. B. SchereSeparator z. B. Scissors
77th
Aufwickeleinheit, AufrollvorrichtungTake-up unit, roll-up device
88th
Bandleitelement/BandweicheBelt guide element / belt switch
99
BandspeicherTape storage
1010
Abwickeleinheit/AbrollvorrichtungUnwinding unit / unwinding device
1111
WalzgerüsteRoll stands
11a11a
ArbeitswalzenWork rolls
11b11b
ArbeitswalzenWork rolls
1212th
TrenneinrichtungSeparator
1313th
Aufrollvorrichtung/AufwickeleinheitRewinder / take-up unit
1414th
PalettentransportsystemPallet transport system
15a15a
BundtransportCoil transport
15b15b
BundtransportCoil transport
2020th
SchweißmaschineWelding machine
2121
KopplungsbandstückCoupling tape piece
2323
TrennvorrichtungSeparator

Claims (12)

  1. Plant for continuous pickling and/or cold-rolling of metal strips, comprising a pickling region (A) for the continuous pickling of a metal strip and a cold-rolling region (B) for the rolling of a metal strip, wherein the pickling region (A) and the cold-rolling region (B) are operable not only in coupled operation, but also in decoupled operation,
    wherein the pickling region (A) comprises at least one unrolling device (1) for the unrolling of metal strips, a welding device (2) for the connection of metal strips, which are unrolled by the unrolling device (1), to form a continuous metal strip, which is to be pickled, and at least one pickling device (4) for the pickling of the continuous metal strip as well as at least one rolling-up device (7) which is arranged for the rolling up of a metal strip, and a separating device (6) arranged at the end of the pickling region (A),
    and wherein the cold-rolling region (B) comprises an unrolling device (10) for the unrolling of a metal strip to be rolled, a rolling device (11) with at least one pair of work rolls (11a, 11b) for the rolling of a metal strip to be rolled, a separating device (12) which is arranged behind the at least one pair of work rolls (11a, 11b) in production direction and at least one rolling-up device (13) for rolling up the rolled metal strip,
    and wherein the plant comprises strip guide elements which are so arranged and equipped that in coupled operation the pickling region (A) and the cold-rolling region (B) are so coupled with respect to guidance of a metal strip that a continuous metal strip pickled in the pickling region (A) can be fed to the cold-rolling region (B) for the rolling and which is so arranged and equipped that in decoupled operation the pickling region (A) and the cold-rolling region (B) are decoupled with respect to guidance of a metal strip and at least a part of a continuous metal strip pickled in the pickling region (A) can be fed to the rolling-up device (7) of the pickling region (A) for the rolling-up,
    characterised in that
    arranged between the pickling region (A) and the cold-rolling region (B) is a transition region (C) comprising a welding device (20) which is equipped to connect a head piece of the pickled continuous metal strip with a coupling strip piece (21), which is placed in the transition region (C), at the time of switching over to coupled operation and that at the start of the cold-rolling region (B) a separating device (23), which is functionally associated with the transition region (C), is arranged in the vicinity of the unwinding unit (10).
  2. Plant for pickling and/or cold-rolling of metal strips according to claim 1, characterised in that the cold-rolling region (B) comprises strip guide elements which are so equipped that in decoupled operation a metal strip to be rolled can be fed from the unrolling device (10) of the cold-rolling region (B) to the pair of work rolls (11a, 11b) for the rolling.
  3. Plant for pickling and/or cold-rolling of metal strips according to claim 1 or claim 2, characterised in that the pickling region (A) comprises at least one strip store (3, 5, 9) which is equipped to store at least in part a metal strip connected by the welding device (2) to a continuous strip.
  4. Plant for pickling and/or cold-rolling of metal strips according to any one of the preceding claims, characterised in that the transition region (C) comprises transport means for transporting a continuous metal strip, which is pickled in the pickling region (A), into the cold-rolling region (B).
  5. Plant for pickling and/or cold-rolling of metal strips according to any one of the preceding claims, characterised in that the strip guide elements comprise a strip diverter (8) in the pickling region (A), the diverter being equipped in decoupled operation to conduct continuous metal strip, which is pickled in the pickling region (A), to the rolling-up device (7) of the pickling region for the rolling up.
  6. Plant for pickling and/or cold-rolling of metal strips according to any one of the preceding claims, characterised in that the rolling device (11) of the cold-rolling region (B) is equipped to enable not only continuous rolling operation, but also batch rolling operation.
  7. Plant for pickling and/or cold-rolling of metal strips according to any one of the preceding claims, characterised in that the rolling device (11) of the cold-rolling region (B) is equipped to enable not only one-way rolling operation, but also reversing rolling operation.
  8. Plant for pickling and/or cold-rolling of metal strips according to any one of the preceding claims, characterised in that the rolling device (11) of the cold-rolling region (B) is equipped to enable not only reduction rolling operation, but also finishing rolling operation.
  9. Method for pickling and/or cold-rolling of metal strips on a plant according to any one of claims 1 to 8, which on switching over from decoupled to coupled operation comprises the following steps:
    setting the strip guide elements in such a way that a pickled continuous metal strip is fed from the pickling device (4) to the welding machine (20) of the transition region (C);
    connecting the head piece of the pickled continuous metal strip with a facing end of a coupling strip piece (21), which is placed in the area of the transition region (C), by means of the welding machine (20);
    guiding the coupling strip piece (21) through the at least one pair of work rolls (11a, 11b) of the rolling device (11);
    separating the coupling strip piece (21) by the separating device (12) from the continuous metal strip after the coupling strip piece (21) has been guided through the at least one pair of work rolls (11a, 11b).
  10. Method for the pickling and/or cold-rolling of metal strips according to claim 9, characterised in that prior to the step of setting the strip guide elements the coupling strip piece (21) is paced in the transition region (C).
  11. Method according to claim 9 or 10, characterised in that in coupled operation the strip guide elements are set in such a way that the plant operates in coupled operation with the following steps:
    feeding the continuous metal strip to the pickling device (4) of the pickling region (A);
    pickling the continuous metal strip by the pickling device (4);
    transporting the pickled continuous metal strip into the cold-rolling region (B);
    rolling the pickled continuous metal strip by the at least one pair of work rolls (11a, 11b);
    at least partial rolling-up of the pickled and rolled continuous metal strip by the rolling-up device (13) of the cold-rolling region (B).
  12. Method for the pickling and/or cold-rolling of metal strips according to any one of claims 9 to 11, characterised in that in decoupled operation the strip guide elements are set in such a way that the plant in decoupled operation operates with the following steps:
    feeding a continuous metal strip to the pickling device (4) of the pickling region (A);
    pickling the continuous metal strip by the pickling device (4);
    rolling-up of at least part of the pickled continuous metal strip by the rolling-up device (7) of the pickling region (A).
EP18758592.2A 2017-10-06 2018-08-21 Multi-flexible rolling mill Active EP3691803B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102017217766 2017-10-06
DE102018207026.1A DE102018207026A1 (en) 2017-10-06 2018-05-07 Multiflexible rolling mill
PCT/EP2018/072469 WO2019068388A1 (en) 2017-10-06 2018-08-21 Multi-flexible rolling mill

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EP3691803A1 EP3691803A1 (en) 2020-08-12
EP3691803B1 true EP3691803B1 (en) 2021-05-19

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EP (1) EP3691803B1 (en)
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CN (1) CN111182978B (en)
DE (1) DE102018207026A1 (en)
WO (1) WO2019068388A1 (en)

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DE102019203622A1 (en) 2018-09-04 2020-03-05 Sms Group Gmbh Process and plant for producing a metallic strip
CN113996671B (en) * 2021-10-29 2024-03-08 江苏沙钢钢铁有限公司 Method, device, equipment and storage medium for calibrating roll gap of wrapper roll

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JP7029524B2 (en) 2022-03-03
EP3691803A1 (en) 2020-08-12
CN111182978A (en) 2020-05-19
DE102018207026A1 (en) 2019-04-11
JP2020535018A (en) 2020-12-03
CN111182978B (en) 2022-05-27
WO2019068388A1 (en) 2019-04-11

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