EP3691803A1

EP3691803A1 - Multi-flexible rolling mill

Info

Publication number: EP3691803A1
Application number: EP18758592.2A
Authority: EP
Inventors: Wolfgang Denker; Kerstin SPILL; Arnulf Wurm
Original assignee: SMS Group GmbH
Current assignee: SMS Group GmbH
Priority date: 2017-10-06
Filing date: 2018-08-21
Publication date: 2020-08-12
Anticipated expiration: 2038-08-21
Also published as: CN111182978B; EP3691803B1; CN111182978A; WO2019068388A1; JP2020535018A; JP7029524B2; DE102018207026A1

Abstract

The invention relates to a system for continuously pickling and/or cold rolling metal strips, having a pickling region and a cold rolling region. The pickling region has an unwinding device, a welding device, a pickling device, and a winding device, and the cold rolling region has at least one pair of working rollers for rolling a metal strip to be rolled and a winding device for winding the rolled metal strip. The system has strip guiding elements which are arranged and designed such that in a coupled operation, the pickling region and the cold rolling region are coupled in terms of guiding a metal strip such that a continuous metal strip that is pickled in the pickling region can be supplied to the cold rolling region for rolling purposes and which are arranged and designed such that in an uncoupled operation, the pickling region and the cold rolling region are uncoupled in terms of guiding a metal strip.

Description

MULTI FLEXIBLE ROLLING SYSTEM

1 . FIELD OF THE INVENTION The invention relates to a plant for pickling and / or cold-rolling metal strips and to a system for pickling and / or cold-rolling strip metal.

2. 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 multistage tandem mill, and then separated and wound in the desired bundle size.

EP 3 006 122 A1 discloses a coupling of an endless pickling line with a reversing rolling 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. Due to the separation of the large bundles of the following band, the band can not be rolled endlessly in a system according to EP 3 006 122 A1, but is first decoupled to be subsequently reconnected. Furthermore, no production of pickled, non-rolled strips is provided in EP 3 006 122 A1. Finally, according to EP 3,006,122 A1, no delivery of strip material from the reel to which the strip is connected to the large bundle is provided being rolled up. 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 line which is coupled to a reversing rolling 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 discontinue 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 plant 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.

3. 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 region further comprises at least one retractor, which for rolling up a metal strip (eg at least one Part of the endless metal belt, if 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 such 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 guide elements a band switch in the pickling area, which is set up to feed in the decoupled operation in the pickling area pickled endless metal band of the pick-up 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 plant according to the invention thus allows in decoupled operation an endless pickling without cold rolling process and in coupled operation an endless pickling with immediately subsequent 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 such 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 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 through the pickling device. Furthermore, a band storage located behind the pickling apparatus and, for example, in front of the pickling area rewinder, can be used to roll pickled metal strip stored in strip memory at a faster rate than metal strip leaves the pickling apparatus. 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. Other measures, such as the uncoupling of sets of rolls From the drive, a reduction of the contact force, etc., are preferably also provided.

In preferred embodiments, the plant can thus be set up to simultaneously enable the following operating modes: a) both endless pickling without cold rolling / cold rolling without preceding pickling (decoupling of pickling device and cold rolling device) on the one hand, and endless pickling with immediately following rolling ( coupled operation) on the other hand; 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); c) both disposable rollers on the one hand, and reversing rollers on the other hand (different production direction modes of the cold rolling); d) both reduction rolls on the one hand, and temper rolling on the other hand (different rolling deformation within the cold rolling range); 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 realized by a single system, it has proved advantageous to limit the system to a change 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 the practice, and also from a production point of view and in terms of federal logistics is advantageous.

In preferred embodiments, the plant (preferably the cold rolling area with its own associated unwinding device and reeling device) is designed to produce multiple bundles of a bundle size of three standard coils (about 30-35 to, up to 25 kg / mm spec. Weight), so in total of about 100 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 has an adjustment of the strip guide elements, so that the system can operate in the coupled mode. 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 of 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 of 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.

The 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

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.

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

Show it

Figure 1 is a schematic side view of a plant for endless pickling and / or cold rolling of metal strips; and

Figure 2 is a schematic plan view of a plant for endless pickling and / or cold rolling of metal strips.

With reference to Figures 1 and 2, a system is described 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 shown in FIG. 1, the equipment is divided into a pickling region A, a cold rolling region B, and a transition region C located between the pickling region A and the cold rolling region B. 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 plant comprises an unwinding unit (unwinding device) 1, for example for standard coils or standard bundles (for example, about 30 to bundle weight). The unwinding unit 1 can also be designed for large bundles or jumbo coils (for example, up to about 100 tons bundle weight), which allows the system greater flexibility in this regard. The plant further comprises a welding machine (welding apparatus) 2 for connecting single belts unwound from the unwinding unit 1 to an endless belt. The system further comprises a strip store 3, a pickling device 4, a further strip store 5, a separating device (for example a pair of scissors) 6, and a take-up unit (reeling device) 7 and a strip guiding element in the form of a band switch 8. 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 can be designed to produce standard coils, allowing for easy doffing and avoiding external separation of large coils. The band switch 8 is an example of a band guide, which can be provided to supply a pickled endless belt to the take-up unit 7 in a decoupled operation of the system, if no subsequent cold rolling operation is provided. Thus, the band switch is used for coupling / decoupling the structurally independent areas of the pickling and the cold rolling mill.

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

In a preferred embodiment, it is possible that, during a coupling of pickling area A to cold rolling area B (in the coupled operation of the installation), a roll change is or can be carried out. As shown schematically in the figure, for this possibility, at least for the required period of time, optionally a further strip accumulator 9 is provided, which may preferably be arranged between the separating device 6 and the take-up unit 7, or the strip accumulator 5 is designed to be correspondingly larger.

In order to couple the pickling area A to the cold rolling area B, suitable strip guiding elements are provided so that a pickled endless belt e.g. can be transported from the pickling area A in the cold rolling area B via suitable guide tables. Also, in the transition region C suitable tape transport devices may be provided.

Cold rolling range B comprises an unwinding unit (unwinding device) 10, for example for standard coils or large bundles, and a rolling device comprising one or more rolling stands 11. The rolling stands 1 1 each have at least one pair of work rolls 1 1 a, 1 1 b, which perform the forming work, or the tempering work. A further separating device 12 (eg in the form of a pair of scissors 12) and a take-up unit (reeling device) 13 are provided in the outlet of the cold rolling region B. The take-up unit 13 can also be designed for standard coils or large bundles, so that the system can preferably be designed 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 the system also has pre-leased bundles, e.g. can be served by other systems to (cold) roll them with the system shown. In a consistent one-way operation of the system, it is also possible that even with the system shown 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 range B can 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 been found to be advantageous if the rolling device 1 1 consists of a maximum of two stands, since in three or more stands the Reversierwalzvorgang in terms of 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. For this purpose, either the band memory 5 is increased or another band memory 9 is provided.

The reversing process means a decoupling of the area of the cold rolling mill B from the pickling area A. When resuming the coupled operation, the band guide in the form of the band switch must be set so that the plant can work in coupled betheb. 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 range B, it has proven to be advantageous in terms of stability to use a pallet transport system (14) instead of a conveyor system with cradles or walking beam conveyors. Such a system is sketched in the cold rolling area B in FIG. This pallet transport system (14) in region B is also advantageous if the system is operated exclusively in one-way operation (for example, only in the direction of production indicated in the figure), since it is a comfortable circulation system for the back-to-back operation described above. Rolling allows. 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.

In particular, if no large bundles are to be processed in the cold rolling area B, the bundle logistics can alternatively take place, for example, via coil trucks 15. Such a bundle logistics is sketched in FIG. 2 by way of example in the pickling area A on the basis of bundle transport 15a and 15b. In this case, individual bundles / standard coils are transported on a coil conveyor 15a to the unwinding unit 1, or transported away from the reeling unit 7 (with bundle lift truck 15b).

As shown in FIG. 1, a transition region C is arranged between the pickling region A and the cold rolling region B in the illustrated installation. Such a transition region C can be provided, in particular, if the plant shown is provided as a modernization of an existing plant or force the structural conditions 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 without further steps through the transition area C in the cold rolling area B to be formed there.

When switching from a decoupled to a coupled mode, the transition range can be used as follows. As shown in FIG. 1, a welding machine 20 is arranged in the transition region C. A coupling tape piece 21, which corresponds approximately to the length of the transition region C, may be placed in this area. The welding machine 20 can then be used to connect an end of the coupling belt 21 facing the pickling area A to a head (or beginning of belt) of a pickled endless metal belt guided from the pickling area A into the transition area C. The coupling tape with the attached tape beginning is then passed through the rolling stands 1 1 (between the rollers of the roller pairs 1 1 a, 1 1 b). In this case, a roll gap between the rollers of the roller pairs 1 1 a, 1 1 b are closed directly after passing through the coupling belt 21, so that the actual rolling endless metal belt can be rolled without significant Maßmaßlängen. The implementation of the coupling belt 21 without reduction in thickness by the rolling stands (1 1) 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 belt 21 may, for example, be wound onto take-up unit 13 and, upon passing through a separator 12 (for example, a pair of scissors 12), be separated from the subsequent endless metal belt to be separately conveyed out. Subsequently, the actual rolling is rolled to target thickness and wound up with take-up unit 13.

In order to save on non-productive time, the winding unit 13 may 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 wrap the coupling tape during the (Main) reel is still available for winding the pickled and rolled endless metal belt (this solution is not shown in the figures). The pupil coil with the coupling belt 21 can then be returned to the pickling area A for recycling. For example, the coupling belt can be fed to the pickling area A when a last belt passes the pickling device A in the coupled operating mode of the installation. The coupling belt 21 may then be welded between the end of the last band of 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 direction of production. In order to separate the coupling tape 21 again in the transition region C, a separating device 6 is provided at the end of the pickling region A, and a separating device 23 is provided at the beginning of the cold rolling region B in the vicinity of the unwinding unit 10 (functionally still belonging to the transition region C). The coupling belt 21 can thus be cut out before and after the region C by means of the separating devices 6 and 23, for example by means of two shears, in order to remain in the region C until the next coupling. The scissors 6 of the pickling section A can be used in decoupled operation to separate sections of pickled endless belt rolled up on the retractor 7 from the remaining endless belt so as to produce coils of pickled, unrolled metal strip.

In decoupled operation, the cold rolling range B can fulfill further rolling tasks in one-way / batch or reversing operation. The cold rolling section B can switch between reducing operation and tempering operation. 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 range

C transition area

1 unwinding unit (unwinding unit)

2 welding device (welding machine)

3 tape storage

4 pickling device

5 tape storage

6 separator z. Scissors

7 take-up unit, retractor

8 Bandleitelement / Bandweiche

9 tape storage

10 unwinding / unwinding device

1 1 rolling stands

1 1 a work rolls

1 1 b work rolls

12 separating device

13 retractor / take-up unit

14 pallet transport system

15a waistband transport

15b waistband transport

20 welding machine

21 coupling tape piece

23 separating device

Claims

claims

A plant for endless pickling and / or cold rolling of metal strips comprising a pickling area (A) for endless pickling of a metal strip and a cold rolling area (B) for rolling a metal strip, wherein the pickling area (A) at least one unrolling device (1) for rolling 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 reeling device (7) adapted for rolling 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, the plant having strip guide elements arranged and that in a coupled operation the pickling zone (A) and the cold rolling zone ( B) are coupled with respect to a guide of a metal strip such that an endless metal strip pickled in the pickling area (A) can be fed to the cold rolling area (B) for 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 continuous metal strip pickled in the pickling area (A) can be fed to the reeling device (7) of the pickling area (A) for rolling up.

The equipment for pickling and / or cold rolling metal strips according to claim 1, wherein said cold rolling section (B) further comprises a rolling device (10) for rolling a metal strip to be rolled, and strip guide elements arranged to be engaged in said decoupled operation Rolling metal strip from the unwinding device (10) of the Cold rolling range (B) can be supplied to the pair of work rolls (1 1 a, 1 1 b) for rolling.

A plant for pickling and / or cold-rolling strip metal according to one of the preceding claims 1 or 2, wherein the pickling area (A) comprises at least one strip accumulator (3, 5, 9) arranged with the welding device (2) to form an endless belt at least partially store connected metal band.

A plant for pickling and / or cold rolling metal strips according to any 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 one in the pickling region (A) has pickled endless metal bands in the cold rolling area (B), and further comprises a welding device (20) adapted to switch, when switched to coupled operation, a head of a pickled endless metal belt having a coupling band piece (21) placed in the transition area (C) connect.

Plant for pickling and / or cold rolling of metal strips according to one of the preceding claims 1 to 4, wherein the strip guiding elements comprise a band switch (8) in the pickling area (A), which is set up in the decoupled operation in the pickling area (A) pickled endless metal strip of the reeling device ( 7) of the pickling area for rolling up.

A plant for pickling and / or cold rolling metal strip according to any one of the preceding claims 1 to 5, wherein the cold rolling area (B) is arranged to enable both a continuous rolling operation and a batch rolling operation.

A plant for pickling and / or cold rolling metal strip according to any one of the preceding claims 1 to 6, wherein the cold rolling area (B) is arranged to enable both one-way rolling operation and reversing rolling operation. A plant for pickling and / or cold rolling metal strip according to any one of the preceding claims 1 to 7, wherein the cold rolling area (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 in 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).

A method of pickling and / or cold rolling strip metal according to claim 9, wherein said cold rolling section (B) further comprises a separating device (12) disposed behind said at least one pair of work rolls (11a, 11b) in the direction of production, and the method further comprising:

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 belt after the coupling tape piece (21) has passed through the at least one pair of work rolls (11a, 11b). 1 1. A method of pickling and / or cold rolling metal strips according to any one of claims 9 or 10, further comprising the steps of:

Adjusting the strip guide elements so that the system 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).

12. A method for pickling and / or cold rolling metal strips according to claim 1 1, further comprising, prior to the step of adjusting the

Bandleitelemente:

Placing the coupling tape piece (21) in the transition area (C). 13. A method for pickling and / or cold rolling of metal strips according to any one of claims 9 to 1 1

characterized in that

for carrying out the method, a plant according to claim 1 is used.