DE102018207026A1 - Multiflexible rolling mill - Google Patents

Abstract

A plant for endless pickling and / or cold rolling of metal strips has a pickling area and a cold rolling area, the pickling area having a rolling device, a welding device, a pickling device and a reeling device, the cold rolling section comprising at least a pair of work rolls for rolling a metal strip to be rolled and a rolling device for rolling up the rolled metal strip, wherein the system has strip guide elements which are arranged and arranged such that in a coupled operation the pickling region and the cold rolling region are coupled with respect to a guide of a metal strip so that a pickled in the pickling area endless metal strip the cold rolling area to Rolls can be supplied, and which are arranged and arranged such that in a decoupled operation of the pickling area and the cold rolling area are decoupled with respect to a guide of a metal strip.

Description

Field of the invention

The invention relates to a plant for pickling and / or cold rolling of metal strips and a method carried out on the plant for pickling and / or cold rolling of metal strips.

Technical background

In coupled pickling tandem mills (known for example as Pickling Line and Tandem Cold Mill, PLTCM), an endlessly welded metal strip is first pickled, then cold rolled in a multi-stand tandem mill, and then separated and wound in the desired bundle size.

EP 3 006 122 A1 discloses coupling an endless pickling line to a reversing mill. In a first cold rolling pass, pickled metal strips are used to produce large bundles with a bundle weight of 100 to 300 tons, each cut off by a subsequent strip. Following a reversing rolling process following the first cold rolling pass, smaller bundles are produced and transported away from a large bundle produced in the first cold rolling pass. Meanwhile, during this rolling operation, pickled strip is stored in a memory adjoining the pickling device. Tape from the store is then joined before a next roll pass to a residual tail remaining in the rolling mill from a leading mill, to produce a next rolled billet.

By separating the large bundles of the subsequent band, the band in a plant after EP 3 006 122 A1 not be rolled endlessly, but is first decoupled to be reconnected afterwards. Furthermore, in EP 3 006 122 A1 no production of pickled, non-rolled strips intended. Finally, after EP 3 006 122 A1 no delivery of tape material provided by the reel on which the tape is rolled up to the large bundle. On the contrary, a reversing rolling operation must be performed to finish the strip from the rolling mill.

EP 2 516 076 B1 discloses an endless pickling plant coupled to a reversing mill. To reduce the Maßmaßlängen the strip is subjected to a pickling step a first rolling, wherein the rolled strip length is greater than the targeted band length of the finished collar. By means of a reversing rolling process, excess strip is first fed back into a strip store before the subsequently rolled strip is brought to the desired bundle size with a suitable separating cut.

Also in the system according to EP 2 516 076 B1 the strip is not endlessly rolled, but decoupled for a Reversierwalzbetrieb. Also according to EP 2 516 076 B1 it is not intended to abort bundles after pickling.

JPS5564906 discloses a single-pass temper mill, which can optionally dress pre-pickled tapes, or coupled with a pickle, can produce pickled and dressed strip in continuous operation. The production direction of the stain is opposite to that of the skin pass mill. It has proved to be disadvantageous here that a portion of a strip whose length corresponds to the length of the pickling tank remains in the pickling tank and is thereby over-stroked, as long as a skin-pass is carried out in a non-continuous batch operation. Production of larger bundles is not provided according to JPS5564906. JPS5564906 also discloses no reversing and no pickling without rolling / tempering.

EP 1 148 956 B1 discloses a system for flexible and economical pickling and cold rolling of metal strips. The system according to EP 1 148 956 B1 has a Schubbeize, with which a band of defined length is pickled, which is either served, or immediately further rolled. Alternatively, pre-tempered bands of the rolling system can be served via the central reel assembly. Due to the configuration of a Schubbeize an endless production is not possible, as always bundles of a defined strip length are made in one piece. The production of bundles with more than one standard bundle size (jumbo coils) is also not planned.

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, which system allows increased flexibility with regard to possible operating modes and output coils used, as well as an enlarged product spectrum. Preferably, non-productive times and Maßmaßlängen should be limited.

Summary of the invention

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 metal strips according to claim 9.

The present invention provides a plant for endless pickling and / or cold rolling of metal strips. In other words, it is possible with the system according to the invention to process on one and the same system metal bands exclusively with an endless pickling (Durchlaufbeizprozess), 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 thereto ,

Accordingly, the equipment according to the invention has a pickling area for endless pickling of a metal strip and a cold rolling area for rolling a metal strip (the same or another). The pickling area has at least one unwinding device for unrolling metal strips to be picked. Suitable metal bands are preferably metal bands that can roll the unwinding device from a corresponding coil or collar. The pickling area further comprises at least one welding device for connecting metal strips unrolled by the unwinding device to a continuous metal strip to be picked, and a pickling device for pickling the endless metal strip. The pickling area further comprises at least one retractor arranged to roll up a metal strip (e.g., at least a portion of the endless metal belt, when the equipment operates in a decoupled operation described below).

In the plant according to the invention, the cold rolling area has at least a pair of work rolls for rolling a metal strip to be rolled and a reeling device for winding the rolled metal strip. The retractor of the cold rolling section is connected downstream of the at least one pair of rollers in the production direction and can be set up for rolling up metal strips into standard coils or large coils (jumbo coils).

According to the invention, the installation has strip guiding elements which are arranged and arranged such that in a coupled operation the pickling area and the cold rolling area are coupled with respect to a guide of a metal strip in such a way that an endless metal strip pickled in the pickling area can be fed to the cold rolling area for rolling. Here are Bandleitelemente components of the system, for example, are suitable and arranged 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.

In the system according to the invention, the strip guide elements are further arranged and arranged such 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 plant components are simultaneously operated from 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 band switch may be provided which controls a transport direction of the metal strip in a suitable manner.

In the system according to the invention, the strip guide elements are arranged in decoupled operation so that at least part of a pickled in the pickling area endless metal strip of the retractor of the pickling area can be supplied for rolling up. Thus, in a preferred embodiment, the strip guiding elements comprise a band switch in the pickling area, which is set up to feed in the uncoupled operation in the pickling area pickled endless metal strip of the rolling device of the pickling area for rolling up. The tape guide is thus suitable to connect or separate two structurally independent areas.

Thus, according to the present invention, coupling / decoupling of an endless pickling operation with a cold rolling operation is advantageously possible. The system according to the invention thus allows in decoupled operation an endless pickling without cold rolling and in coupled operation an endless pickling with immediately following cold rolling. The system according to the invention thus allows an advantageously high flexibility with regard to these possible operating modes on only one system.

In a preferred embodiment, the cold rolling section further comprises a rolling device for rolling a metal strip to be rolled, and strip guiding elements arranged so that in the decoupled operation, a metal strip to be rolled can be fed from the rolling device of the cold rolling section to the pair of work rolls for rolling. In this way, in decoupled operation, cold rolling without preceding pickling is additionally possible, which further increases the flexibility of the system.

In a preferred embodiment, the pickling region 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 accumulator, which is arranged between the welding device and the pickling device, can be used, differences between a speed of the metal strip leaving the welding system and a speed at which a metal strip can pass through the pickling device. Furthermore, a strip accumulator located behind the pickling device and, for example, in front of the pickling section retractor, may be used to roll stained metal strip stored in the strip accumulator at a faster rate than metal strip leaves the pickling device. Also, the at least one tape storage thus contributes to the flexibility of the system and favors in particular the use of endless metal belts.

In a preferred embodiment, the system further comprises a transition region between the pickling region and the cold rolling region. In this case, the transition region transport means, for example suitable Latvian, for transporting a pickled in the pickling endless metal strip for rolling in the cold rolling area. The transition region further comprises a welding device configured to connect, when switching to coupled operation, a header of the pickled endless metal strip with a coupling tape piece. The coupling tape piece may be placed, for example, in the transition area to suitably bring into the cold rolling area, and in particular between the pair of work rolls, an endless belt having passed the pickling area when switching to the coupled operation of the plant. For example, the coupling tape can be passed with the attached tape head / head between the rollers of the at least one pair of rollers. During this threading operation, the nip between the pair of work rolls may be set at the target thickness or may have a larger gap. After passing the coupling tape, it can be closed directly. In both cases, the actual endless belt to be rolled is rolled without appreciable dimensioning lengths.

In a preferred embodiment, the cold rolling section is adapted to allow both continuous rolling operation and batch rolling operation rolling operation. In a preferred embodiment, the cold rolling section is adapted to enable both one-way rolling operation and reversing rolling operation. In these embodiments, the cold rolling area may have suitable tape transport and routing means, in particular for these operations, as well as a correspondingly configured control unit for corresponding manual and / or automated operation.

In a preferred embodiment, the cold rolling section is arranged to enable both a reduction rolling operation and a temper rolling operation. For this purpose, preferably suitable roller sets are provided with a suitable roll roughness. Further measures, such as the decoupling of sets of rollers from the drive, a reduction of the contact force, etc., are preferably also provided.

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 simultaneously enable the following operating modes:

1. a) both endless pickling without cold rolling / cold rolling without preceding pickling (decoupling of pickling and cold rolling) on the one hand, and endless pickling with immediately subsequent rolling (coupled operation) on the other;
2. b) both endless rolls on the one hand, and batch or semi-endless cold rolling on the other hand (different production modes of the cold rolling section);
3. c) both disposable rollers on the one hand, and reversing rollers on the other hand (different production direction modes of the cold rolling);
4. d) both reduction rolls on the one hand, and temper rolling on the other hand (different rolling deformation within the cold rolling range);
5. e) establishments both with normal individual bundles (standard coils) on the one hand, and companies with multiple bundles / large bundles on the other hand.

Preferably, the system allows at least three of the modes a) to e). Although theoretically technically all operating modes a) to e) can be implemented by a single system, it has proven to be advantageous to restrict the system to switching between three of the five operating modes mentioned. It has been found that a combination of three of the modes a) to e) allows a desirable flexible system, but the system then at the same time suitable for practice, and also from a production point of view and in terms of federal logistics is advantageous.

In preferred embodiments, the system (preferably the cold rolling section with its own associated unwinding device and retractor) is designed to have multiple bundles of a waist size of three standard coils (about 30-35 tons, up to 25 kg / mm of specific weight), ie in total of about 100 to, to edit. It has been found that such a required stability is achieved, with a constriction during winding remains within acceptable tolerances.

The present invention further provides a process for pickling and / or cold rolling metal strips on a plant as described in the foregoing. The method initially comprises adjusting the strip guide elements, so that the system in the coupled operation can work. By way of example, a strip switch connected upstream of the cold rolling zone in the direction of production can be adjusted such that an endless metal strip can be fed to the cold rolling zone after pickling from the pickling zone via the band switch. The step of adjusting the strip guiding elements may be performed at any appropriate time during the process.

The method further comprises a step of feeding an endless metal belt to the pickling device of the pickling section and a step of picking the endless metal belt with the pickling device. The method comprises a step of transporting the pickled endless metal strip into the cold rolling area. The method comprises a step of rolling the pickled endless metal strip with the at least one pair of work rolls. Further, the method comprises a step of reeling up the pickled and rolled endless metal strip with the reeling device of the cold rolling section. In this case, the rolled endless belt is rolled up, for example, so that sections of the endless belt are rolled up, for example, to standard coils or large coils, which are then separated from the remaining endless belt and transported away individually. Thus, in continuous operation, coils of pickled and rolled metal strips can be produced by the method.

In a preferred embodiment, the cold rolling area further comprises a separating device, for example a pair of scissors, which is arranged downstream of the at least one pair of work rolls in the production direction. Then, in a preferred embodiment, the method comprises a step of connecting a head piece of the pickled endless metal strip to the coupling tape piece in the transition region. The method further includes a step of guiding the coupling tape piece through the at least one pair of work rolls. However, these are preferably not necessarily spaced apart so that the coupling tape is not rolled, that is, subjected to a corresponding force is. The method further includes a step of severing the coupling tape piece with the severing device from the endless metal belt 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 rollers so that the endless belt following the coupling is rolled to a target thickness.

In a preferred embodiment, the method further comprises adjusting the strip guide elements, so that the system can operate in the decoupled operation. For example, for this purpose, a strip turntable upstream of the cold rolling section in the direction of production can be adjusted such that an endless metal strip can not be fed to the cold rolling section after pickling from the pickling section via the band switch, but instead can be fed to the pickling section. The step of adjusting the ribbon guide members may be performed at any appropriate time during the process to couple or decouple the structurally distinct portions of the stain and the cold rolling mill.

The method further comprises feeding a continuous metal belt to the pickling device of the pickling section, pickling the endless metal belt with the pickling device, and rolling at least a portion of pickled endless metal belt with the pickling section retractor. Here, the pickled endless belt, for example, partially rolled so that sections of the endless belt are rolled up, for example, to standard coils or large coils, which are then separated from the remaining endless belt and transported individually. For this purpose, the pickling region preferably has a suitable separating device, for example a pair of scissors, which is connected downstream of the pickling device in the production direction and upstream of the reeling device of the pickling region. Thus, in continuous operation, coils of pickled metal strips not rolled by the system itself can be produced by the method.

In a preferred embodiment, prior to the step of feeding the endless metal belt from the pickling area to the rolling area, the method comprises placing the coupling belt section 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, it does not have to be temporarily stored.

• - 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 AnlageThe plant described above for the endless pickling and / or cold rolling of metal strips and the associated method allow the production

• - pickled and oiled tapes (without rolling), or the production
• - pickled and cold-rolled strips, or the manufacture
• - pickled and cold rolled and dressed strips

optionally

• - in continuous operation or
• - in semi-continuous operation or
• - in batch mode

optionally with

• - standard waistband (about 30 to waist weight)
• - up to triple standard bundle weight, max. approx. 100 tons bundle weight (jumbo coil) (for example in semi-endless production)

on one and the same plant

• - Einwegwalzbetrieb
• - und Reversierwalzbetrieb

Umschalten.Preferably, the plant can be between

• - One-way rolling operation
• and reversing rolling operation

Switch.

This makes it possible to realize a highly flexible system concept in a limited space, which can combine many different production modes, for which previously different systems had to be provided.

Description of the Preferred Embodiments

Embodiments of the invention are illustrated in the figures and will be explained in more detail below.

• 1 eine schematische Seitenansicht einer Anlage zum Endlosbeizen und/oder Kaltwalzen von Metallbändern; und
• 2 eine schematische Draufsicht einer Anlage zum Endlosbeizen und/oder Kaltwalzen von Metallbändern.

Show it

• 1 a schematic side view of a plant for endless pickling and / or cold rolling of metal strips; and
• 2 a schematic plan view of a plant for endless pickling and / or cold rolling of metal strips.

With reference to the 1 and 2 There is described a system which, in a decoupled mode, permits both endless pickling of an endless metal belt and cold rolling of a metal belt, and which, in coupled operation, enables endless pickling of an endless metal belt and subsequent cold rolling of the pickled endless belt.

As in 1 shown, the plant is subdivided into a pickling area A , a cold rolling area B and a transition area C that is between the pickling area A and the cold rolling area B located. The following description focuses on essential components of the plant. For the sake of clarity, a description of possibly provided tables, pulleys, Bridle, drive rollers, media systems, transport vehicles, etc. is dispensed with.

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 tons coil weight). The unwinding unit 1 but can also be designed for large bundles or jumbo coils (for example, up to about 100 to bundle weight), which allows the system in this regard greater flexibility. The system also includes a welding machine (welding device) 2 for connecting single bands coming from the unwinding unit 1 be wound up, to an endless volume. The system also includes a tape storage 3 , a pickling device 4 , another tape storage 5 , a separator (eg a pair of scissors) 6 , as well as a take-up unit (retractor) 7 and a band guide in the form of a band-link 8th ,

The winding unit 7 may alternatively comprise one or two reels, or may also be provided as a turning reel. Preferably, the take-up unit 7 be designed to produce standard coils, which allows easy dorming and avoids external separation of large coils. The band-link 8th FIG. 10 is an example of a tape guide which may be provided to provide a pickled endless belt of the take-up unit in a decoupled operation of the machine 7 supplied, if no subsequent cold rolling process is provided. Thus, the band switch is used for coupling / decoupling the structurally independent areas of the pickling and the cold rolling mill.

One from the take-up unit 7 rolled up coil or coil can be transported from there suitable. The system according to the invention thus makes it possible, in decoupled operation, to produce endlessly etched non-rolled metal strip. In this operation are the pickling area A and the cold rolling area B decoupled.

In a preferred embodiment, it is possible that during a pickling area A with the cold rolling area B (in the coupled operation of the system) a roll change is or can be performed. As shown schematically in the figure, this option, at least for the required period of time, is optionally a further strip accumulator 9 provided, which preferably between the separator 6 and the take-up unit 7 can be arranged, or the tape storage 5 is designed accordingly larger.

To the pickling area A with the cold rolling area B To couple, suitable strip guide elements are provided so that a pickled endless belt, for example via suitable guide tables from the pickling area A in the cold rolling area B can be transported. Also can do so in the transition area C suitable tape transport devices may be provided.

Cold rolling B comprises an unwinding unit (unwinding device) 10 For example, for standard coils or large bundles and a rolling mill, the one or more rolling stands 11 includes. The rolling stands 11 each have at least one pair of work rolls 11a . 11b on who perform the forming work, or the tempering work. In the outlet of the cold rolling area B is another separator 12 (eg in the form of a pair of scissors 12 ), and a take-up unit (retractor) 13 intended. The winding unit 13 can also be designed for standard coils or large bundles, so that the system can be designed preferably both for operation with standard coils as well as for operation with large bundles. Preferably, a single plant can enable both farms. The supply and delivery of the league can be done in several ways, which are described below.

By providing the standalone unwinding unit 10 It is possible that with the plant also pre-leased bundles eg from other plants can be served, in order to cold-roll them with the shown plant (only). In a consistent one-way operation of the system, it is also possible that even with the system once rolled coils again the unwinding unit 10 can be fed to be rolled again (back-to-back rollers).

Alternatively or additionally, the cold rolling area B also be designed as a reversing system. For example, a first rolling pass may then be carried out in an endless mode, and a subsequent rolling pass may then be a reversing operation in a batch or semi-endless mode. In this case, it has proved to be advantageous if the rolling device 11 consists of a maximum of two stands, since in three or more stands the Reversierwalzvorgang with regard to the technical control, the usual stitch sequences, as well as the Maßmaßlängen can bring about undesirable effects.

For the reversing rolling process, extended strip storage capacities must be available to accommodate the pickled strip during this period. This is either the tape memory 5 enlarged or another tape storage 9 intended.

The reversing process means a decoupling of the area of the cold rolling mill B from the pickling area A , When resuming coupled operation, the tape guide must be set in the form of the tape switch so that the system can operate in coupled operation. Preferably, the head piece of the new pickled and still to be rolled endless belt is welded to the coupling band placed in the transition region, in order to be subsequently rolled in the cold rolling mill.

For using large coils in the cold rolling area B it has proved to be advantageous in terms of stability, a transport system with pallets ( 14 ) to be used instead of a transport system with Bundhubwagen or Hubbalkenförderern. Such a system is in the cold rolling area B in 2 outlined. This pallet transport system ( 14 ) in the area B is also advantageous if the system is operated exclusively in one-way operation (for example, only in the direction indicated in the figure production), as it allows a comfortable circulation system for the back-to-back rolling described above. However, since the pallet transport system can also be used equally in a reversing operation, it has proven to be particularly suitable for the system, which can thus be operated flexibly in a one-way operation and a reversing operation. In particular, when winding large bundles and also during bundle handling, and when rolling thin end thicknesses, the use of corresponding sleeves is preferably provided. This serves to increase security. For reasons of clarity, this is not shown in the figures.

Especially when cold rolling B Bundles can not be processed, for example, via Bundhubwagen 15 respectively. Such a bund logistics is in 2 as an example in the pickling area A by federal transport 15a and 15b outlined. Here are individual bundles / standard coils on a Bundhubwagen 15a to the unwinding unit 1 transported, or from the take-up unit 7 transported away (with Bundhubwagen 15b) ,

As in 1 is shown in the illustrated plant between the pickling area A and the cold rolling area B a transition area C arranged. Such a transition area C may be provided in particular if the system shown is provided as a modernization of an existing system or enforce the structural requirements greater distances. In this case, the transition device C a greater spatial distance (for example more than 20 m) between the pickling area A and the cold rolling area B bridged. If the system is operated in coupled operation, a pickled belt without further steps through the transition area C in the cold rolling area B be led to be transformed there.

When switching from a decoupled to a coupled operation of the Transition area can be used as follows. As in 1 shown is in the transition area C a welding machine 20 arranged. A coupling tape piece 21 , which is approximately the length of the transition area C corresponds, can be placed in this area. The welding machine 20 can then be used to pickle the area A facing end of the coupling tape 21 with a head piece (or beginning of tape) from the pickling area A in the transition area C To connect guided stained endless metal bands. The coupling tape with the stitched beginning of the tape is then through the rolling stands 11 (between the rollers of the roller pairs 11a . 11b) passed. In this case, a roll gap between the rollers of the roller pairs 11a . 11b after passing the coupling tape 21 be closed directly, so that the actually rolling endless metal band can be rolled without significant Maßmaßlängen. Performing the coupling tape 21 without thickness reduction by the rolling stands ( 11 ) has the advantage that the coupling band can be used more often before it is scrapped. In addition, the thickness can be selected independently of the endless belt. It is not absolutely necessary.

The coupling band 21 For example, on take-up unit 13 be wound and when passing a separator 12 (for example, a pair of scissors 12 ) are separated from the subsequent endless metal belt to be discharged separately. Subsequently, the actual rolling is rolled to target thickness and with winding unit 13 wound.

To save on non-productive time, the take-up unit can 13 consist of two reels, a reel or a reel and a Pup Coil reel simple design. One of the reels or the Pup Coil reel can then be used to wind the coupling tape while the (main) reel is still available for winding the pickled and rolled endless metal belt (this solution is not shown in the figures). The Pup-Coil with the coupling tape 21 can then go back to the pickling area A be recycled. For example, the coupling tape may be the pickling area A then fed when a last band in the coupled mode of operation of the plant, the pickling A happens. The coupling band 21 can then be welded between the end of the last band of the coupled operation rolled in the coupled mode of operation and a beginning of a subsequent first band of the decoupled mode of operation to be transported with these bands in the production direction. To the coupling band 21 in the transition area C to separate again are at the end of the pickling area A a separator 6 , and at the beginning of the cold rolling area B near the unwinding unit 10 (functional to the transition area C belonging) a separating device 23 intended. The coupling band 21 can thus before and after the area C by means of separating devices 6 and 23 , for example by means of two scissors, are cut out to the next coupling in the area C to remain. The scissors 6 of the pickling area A can be used in decoupled operation, sections of pickled endless belt, which is on the retractor 7 were rolled up to separate from the remaining endless belt so as to produce coils of pickled, non-rolled metal strip.

In decoupled operation, the cold rolling range B fulfill other rolling tasks in one-way / batch or reversing operation. The cold rolling area B can switch between reducing mode and tempering mode. For this purpose, in particular appropriate roller sets are provided with a suitable roll roughness. Other measures, such as a decoupling of roller sets from the drive, a reduction of the contact force, etc, can be provided constructively. Conceptually, even a DCR (Double Cold Reduction Mill) operation may be possible with a corresponding production sequence.

LIST OF REFERENCE NUMBERS

A

pickling area

B

Cold rolling

C

Transition area

1

Unwinding device (unwinding unit)

2

Welding device (welding machine)

3

tape storage

4

pickling

5

tape storage

6

Separator z. Scissors

7

Winding unit, retractor

8th

Bandleitelement / band Soft

9

tape storage

10

Unwinding / roll-off device

11

rolling mills

11a

strippers

11b

strippers

12

separator

13

Roll-up / take-up

14

Pallet transport system

15a

coil transport

15b

coil transport

20

welding machine

21

Coupling piece of tape

23

separating device

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 3006122 A1 [0003, 0004]
• EP 2516076 B1 [0005, 0006]
• EP 1148956 B1 [0008]

Claims (13)

Apparatus for endless pickling and / or cold rolling of metal strips, comprising a pickling region (A) for endless pickling of a metal strip and a cold rolling region (B) for rolling a metal strip, wherein the pickling area (A) at least one unrolling device (1) for unwinding metal strips, a welding device (2) for joining metal strips unrolled by the unwinding device (1) to an endless metal strip to be etched, and at least one pickling device (4) for picking up the endless metal strip, and at least one retractor (7) adapted to roll up a metal strip, wherein the cold rolling section (B) comprises at least a pair of work rolls (11a, 11b) for rolling a metal strip to be rolled, and at least one retractor (13) for rolling the rolled metal strip, wherein the system comprises strip guide elements which are arranged and arranged such that in a coupled operation the pickling region (A) and the cold rolling region (B) are coupled with respect to a guide of a metal strip in such a way that an endless metal strip pickled in the pickling region (A) reaches the cold rolling region (B ) can be fed to rolling, and which are arranged and arranged such that in a decoupled operation the pickling area (A) and the cold rolling area (B) are decoupled with respect to a guide of a metal strip, and at least a part of a pickling area (A) pickled endless metal strip of the reeling device (7) of the pickling area (A) can be fed to roll up. Plant for pickling and / or cold rolling of metal strips according to Claim 1 wherein the cold rolling section (B) further comprises a rolling device (10) for rolling a metal strip to be rolled, and strip guide elements arranged so that in the decoupled operation, a metal strip to be rolled from the unwinding device (10) of the cold rolling section (B) Pair of work rolls (11a, 11b) for rolling can be supplied. Plant for pickling and / or cold rolling metal strips according to one of the preceding Claims 1 or 2 in that the pickling area (A) has at least one strip store (3, 5, 9) which is set up to at least partially store a metal strip connected to the welding device (2) to form an endless strip. Plant for pickling and / or cold rolling metal strips according to one of the preceding Claims 1 to 3 further comprising a transition region (C) between the pickling region (A) and the cold rolling region (B), the transition region (C) comprising transport means for transporting an endless metal strip pickled in the pickling region (A) to the cold rolling region (B), and further a welding device (20), which is adapted, when switching to the coupled operation, to connect a head piece of a pickled endless metal band to a coupling band piece (21) placed in the transition region (C). Plant for pickling and / or cold rolling metal strips according to one of the preceding Claims 1 to 4 , wherein the band guide elements comprise a band switch (8) in the pickling area (A), which is set up to feed in the decoupled operation in the pickling area (A) pickled endless metal band of the pick-up roll-up device (7). Plant for pickling and / or cold rolling metal strips according to one of the preceding Claims 1 to 5 wherein the cold rolling section (B) is arranged to enable both a continuous rolling operation and a batch rolling operation. Plant for pickling and / or cold rolling metal strips according to one of the preceding Claims 1 to 6 wherein the cold rolling section (B) is arranged to enable both one-way rolling operation and reversing rolling operation. Plant for pickling and / or cold rolling metal strips according to one of the preceding Claims 1 to 7 wherein the cold rolling section (B) is arranged to enable both a reduction rolling operation and a temper rolling operation. Method for pickling and / or cold rolling metal strips on a plant for pickling and / or cold rolling metal strips, comprising the following steps: Adjusting the strip guide elements so that the system can operate in the coupled mode; Feeding an endless metal belt to the pickling device of the pickling section (A); Pickling the endless metal strip with the pickling device (4); Transporting the pickled endless metal belt into the cold rolling area (B); Rolling the pickled endless metal belt with the at least one pair of work rolls (11a, 11b); At least partially rolling up the pickled and rolled endless metal strip with the retractor (13) of the cold rolling section (B). Process for pickling and / or cold rolling of metal strips according to Claim 9 wherein the cold rolling section (B) further comprises a severing device (12) disposed downstream of the at least one pair of work rolls (11a, 11b) in the production direction, and wherein the method further comprises: Bonding a header of the pickled endless metal strip to the coupling tape piece (21) in the transition area (C); Passing the coupling tape piece (21) through the at least one pair of work rolls (11a, 11b); Separating the coupling tape piece (21) with the severing device (12) from the endless metal tape after the coupling tape piece (21) has passed through the at least one pair of work rolls (11a, 11b). Process for pickling and / or cold rolling metal strips according to one of Claims 9 or 10 further comprising the steps of: adjusting the ribbon conductors so that the equipment can operate in the decoupled mode; Feeding an endless metal belt to the pickling device of the pickling section (A); Pickling the endless metal strip with the pickling device (4); Rolling at least a portion of pickled endless metal belt with the retractor (7) of the pickling area (A). Process for pickling and / or cold rolling of metal strips according to Claim 11 further comprising, prior to the step of adjusting the strip guiding elements: placing the coupling strip piece (21) in the transition region (C). Process for pickling and / or cold rolling metal strips according to one of Claims 9 to 11 characterized in that for carrying out the method a plant according to Claim 1 is used.

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