EP3946772A1

EP3946772A1 - Method for preventing shape changes in metal coils, in particualr for preventing a collapsing of newly wound hot coils

Info

Publication number: EP3946772A1
Application number: EP20700748.5A
Authority: EP
Inventors: Roland Hofer; Lukas PICHLER; Christoph Salzmann; Alois Seilinger; Olaf Silbermann
Original assignee: Primetals Technologies Austria GmbH
Current assignee: Primetals Technologies Austria GmbH
Priority date: 2019-03-26
Filing date: 2020-01-21
Publication date: 2022-02-09
Anticipated expiration: 2040-01-21
Also published as: EP3715003A1; WO2020192980A1; CN113631289B; EP3946772B1; CN113631289A; US20220184687A1

Abstract

The invention relates to a method for preventing shape changes in metal coils (1), in particular for preventing a collapsing of newly wound hot coils (1). In the method, a metal coil (1), in particular a newly wound hot coil (1), is rotated (3) about its longitudinal axis (2) intermittently in a first rotational direction (5) and then rotated back (4) in a second opposing rotational direction (6), or further rotated (17) in the first rotational direction (5).

Description

description

Method for avoiding changes in shape in metal bonds, in particular for avoiding the collapse of freshly wound warm bonds

The invention relates to a method for avoiding changes in shape in metal bonds, in particular for avoiding a collapse of freshly wound hot bonds, which or which collapse, for example, during the production of

Steel products, such as metal strips, can occur in hot rolling mills or hot rolling mills.

In steel production there is a trend towards the production of more and more high-strength, high-strength and ultra-high-strength steel grades, as is the case in the production of metal strips.

This trend also requires increased requirements in the production process of steel products with such steel grades, especially when hot rolling these steel products in hot rolling mills / hot rolling mills.

Due to the fact that the steel grades are always high, higher and extremely high, a phase transformation of the steel product, for example from austenite to ferrite, can occur not only in a cooling section of a hot rolling mill, but also - following the cooling section - in a reel (, in which the steel / metal strip following a rolling step / rolling process - freshly wound - is wound into a hot coil or coil), during a transport - the freshly wound and drawn off the reel (and possibly already tied) hot coil - to a coil store or in a bundle warehouse of a hot rolling mill (in which the freshly wound hot bundle is stored) occur ("delayed phase transition lung "), especially for those grades that are subsequently still cold-rolled.

Phase changes in the product, such as the metal bundle or the freshly wound hot bundle, in turn lead to local volume changes and shape changes / deviations ("collapse"), which are undesirable and / or which lead to serious problems, especially when transporting the bundle and in further processing plants A special form of this collapse in a steel product is what is known as "ovalization", in which - here in a metal / hot coil or coil - a change in shape / deviation of an initial (approximately) round shape to an oval shape he follows.

In the case of metal strips with such special steel grades, e.g. high-carbon steels, press-hardened steels or multi-phase steels, or in the production of such metal bands, the delayed phase transformation and so on can occur, especially during reeling or during coil transport where the metal band is present as a (wound) coil or coil Change in volume or shape of the product or bundle / coil, d. H. the (undesired) collapse or ovalization.

From EP 1 683 588 B1 a device is known for the transport of very heavy metal strip coils produced following rolling processes by winding up rolled metal strips. This device comprises a set of pallets in a circulation system and roller tables that convey these further. A pallet consists of spaced-apart Längsträ ger and a bridging collar support saddle, the ge opposite, has a support bracket including supports. In order to enable an operationally reliable transport system despite the cumulative effects of load and heat, the pallet for transporting a bundle is designed with a vertical and horizontal deformation that compensates for vertical and horizontal deformation at least its longitudinal members.

From KR101695986 Bl is another device for

Transport of metal coils, d. H. a so-called "coil car" is known. In order to bring a metal collar on the transport device into a desired position, rotatable support rollers are provided on the transport device, by means of which an overlying metal collar can be rotated into the desired position.

EP 2 629 899 B1 also describes a device for transporting metal coils. This provides a "solid" collar / support saddle provided with heat shields on the device, on which the metal collar is placed during transport.

From US 4,271,959 A on the walking beam principle be resting device for the removal of freshly wound hot coils from the discharge reel of a hot rolling mill is known. During the transport by means of a large number of movable, but stationary mechanical actuators, the bundles are also rotated around their longitudinal axis by a certain angular amount with each lifting movement. Although this successfully counteracts deformation of the collars, a correspondingly high number of individual strokes is necessary for a greater transport distance, which can damage the circumferential surface of the collars. It is also possible that a bundle comes to rest on its outer belt end during the transport process, which is due to its own weight of the bundle can lead to mechanical impressions in the underlying winding layers.

KR 101 036 318 B1 discloses a relocating device for collars, by means of which a change in shape (ovalization) of the collars can be reversed. A first conveyor belt with support devices for individual bundles transports them one behind the other to a transfer station, at which an individual bundle is picked up by a vertically height-adjustable and laterally movable pallet truck and transferred to a second, similar conveyor belt. If necessary (ovalization) the federal government in question can be temporarily placed on a bullhead of rotatably driven rollers during the relocation process from the lift truck, where it is rotated by 90 ° so that the ovalization is compensated. Although the disclosed invention can compensate for an existing deformation of the collar, because the turning process takes place only at one point, it is not possible to prevent a disadvantageous deformation from the outset or to counteract such during the entire transport process.

KR 2012 012518 A discloses a transport trolley that can be moved along one direction and has four support rollers for receiving a hot bundle. For the purpose of rotating a federal located on the Trans port trolley at least two axially opposite support rollers are each connected to a drive attached to the trolley, with the drives must be synchronized. For an abrupt stop of the turning process (for example due to an emergency situation) braking devices attached to the trolley are provided. To correct a collar deformation (ovalization), KR 101 036 318 Bl suggests turning the collar on the transport trolley by 90 °. It is true that with the disclosed transport car an ovalization of a federal be counteracted, but the rotary drives and brakes require an increased dead weight and increased construction and energy expenditure for a bundle transport.

KR 101 420 629 B1 proposes a spreading device in combination with a stationary coil depositing device with rotatably driven support rollers on which an oval-shaped flange is first deposited. The spreader is inserted into the collar eye in a horizontal orientation, then both parts are rotated 90 °. The oval collar sags due to its own weight in the vertical direction until the spreader blocks any further sagging. Subsequent cooling stabilizes the form-corrected collar so that the spreader collapses and can be removed again from the collar eye. Once again, although it is possible to restore an originally round collar shape, it cannot be prevented from the outset and can only be carried out selectively, i.e. not during a bundle transport.

JP 2010 207836 A proposes a transport trolley with rotationally driven support rollers to prevent changes in shape of a collar with increased temperature, the collar being rotated continuously during the transport process on the transport cart at at least 1 revolution per minute and the rotary movement at least 30 seconds Transfer of the federal government to the reel of the subsequent processing station is started. Although this can avoid a deformation of the collar, the continuous continuous rotation of the collar leads - especially for longer ones

Transport processes - to an unnecessarily high wear on the outer surface of the bundle.

The invention is based on the object of providing a method with which problems in the production Development of metal bundles, in particular problems with freshly wound (warm) bundles, can be avoided or, in particular, a collapse or ovalization can be avoided in freshly wound (warm) bundles. In particular, the disadvantages of known solutions should be avoided and federal movements should be used as sparingly as possible in order to prevent unnecessary damage to the surface of the federal government.

This object is achieved by a method for avoiding changes in shape in metal coils, in particular for avoiding a collapse of freshly wound warm coils, with the features of the respective independent claim. Advantageous developments of the invention or the (or all) methods according to the invention are the subject matter of the dependent claims and the following description.

In a method for avoiding changes in shape in metal bundles, it is provided that a metal bundle, in particular a freshly wound hot bundle, in particular made of a high-carbon steel, a press-hardening steel, a multi-phase steel or an Advanced High Strength Steel Grade (AHSS) steel , about its longitudinal axis intermittently in a first direction of rotation and then rotated back in a second opposite direction of rotation or is rotated further in the first direction of rotation.

"Metallbund" (also usually just "coil" for short) denotes a metal product produced by winding a metal strip.

“Freshly wound” may refer to a metal collar which is produced by winding a rolled metal strip after a rolling process. "Warmbund" can denote a metal collar made of a hot-rolled metal strip.

"Intermittent", in general meaning as "with an interruption / pause", means that between the backward and the (closed) backward rotation or between the forward and the further rotation a - conscious or conscious / targeted te / set - temporal (turning) interruption / (turning) pause (short interruption / pause) takes place.

The forward rotation, the interruption / pause and the (close) reverse rotation or the further rotation are also often referred to in the following simply as (one) "cycle".

This "conscious" or "consciously inserted" pause (between turning backwards and forwards or between turning backwards and forwards) is such a - targeted - pause (hereinafter also referred to as "cycle pause" for short) inner-cyclical pause "), which can be achieved by reversing the direction of rotation (when turning backwards and forwards) by simply switching between the directions of rotation, or by simply (briefly), particularly unwanted, stagnation between the two directions - and the further rotation goes out.

In this context, consciously or specifically also means that a pause duration / length is specifically selected and / or set (in contrast to a mere "switching of the directions of rotation" or an unwanted stall), in particular depending on one or more specific ones This means that turning back and forth or turning back and forth is specifically interrupted for a predetermined pause.

During this pause or pause, the metal bundle or the freshly wound warm bundle expediently remains in place Rest, at least there is no rotational manipulation of the metal / hot collar.

It is harmless if the cycle of the metal / hot collar is superimposed by another action / manipulation of the metal / hot collar, for example a translatory process of the metal / hot collar - during the cycle.

In particular, the duration of the pause (or duration of rest / length of the rest phase) between the forward and backward rotation or between the forward and further rotation can be selected depending on a material of the metal collar, in particular the freshly wound warm collar (, ie thus consciously - depending on the material - chosen / adjusted).

A parameter determining the duration of the break or the duration / phase of rest can also include a size, a circumference, a diameter, a weight and / or a temperature of the metal bundle, in particular the freshly wound warm bundle, and / or a thickness of the metal bundle / Be a hot bundle of wound metal tape.

Several parameters or several parameters in combination can also be used to determine the pause duration or rest period / phase between the forward and backward rotation or the forward and further rotation or can be used when defining the pause duration or rest period / phase can be consulted or used.

Furthermore, in particular, the pause duration or the rest duration / phase between the forward and backward rotation or the forward and further rotation of the metal coil, in particular the freshly wound warm coil, can be in a range (min./max ) from approx. 50 s to 300 s, in particular 100 s to 300 s, further in particular from approx. 150 s to 250 s, or be (set). In the case of metal products, an appropriate pause of approx. 200 s can also be provided.

The method is based on the knowledge gained that the cycle, i. H. the intermittent back and forth rotation or back and forth rotation of the metal / hot collar ensures that the phase transformation in the metal collar or freshly wound warm collar does not have any significant effect on the shape of the collar. This fact is based on the fact that the phase transformations mentioned at the beginning and the associated changes in volume do not lead to continuous changes / deviations in shape of the covenant in question, but rather occur in discrete steps, for example when a critical value of the static friction between adjacent turns of the federal government is undercut. In other words, the federal government slides piece by piece under its own weight, for example. A continuous change in the spatial alignment of the federal government to maintain the original winding shape is therefore not absolutely necessary.

As a result of the cycle, the metal / hot collar moves into changed, in particular "antipodal", layers / positions in which changes in shape in the metal / warm collar (by gravity effects) are "compensated for".

Therefore D. H. By compensating for deformation in the metal / hot collar during intermittent turning back and forth or intermittently turning back and forth, the collapse or ovalization of a metal collar, especially a freshly wound warm collar, can be counteracted.

Problems related to this, such as those that can arise, for example, when winding onto a reel mandrel (if the collar to be opened is collapsed / ovalized) can thus be avoided.

Appropriately, it can also be provided that the metal collar, in particular the freshly wound warm collar, is rotated back and forth several times or rotated further several times, for example two, three, four or even more times, which in particular for one expression or Maintaining a round shape of the metal / hot collar is beneficial. In short, several cycles are run for the metal / hot coil.

In particular, several cycles in the metal / hot collar ensure a pronounced "antipodal" effect - and in particular ensure that the phase transition has no significant effect on the collar shape.

It is also useful that such a - conscious - pause / interruption, like the "cycle pause" (within a cycle) or "intra-cycle pause", also between two cycles (briefly here then "cycle pause" or "inter-cycle pause" ) or between two further rotations (briefly also here "cycle pause" or "intermediate cycle pause") is provided (all then intermittent processes).

The cycle pause or inter-cycle pause can according to the corresponding parameters such as the cycle pause or inner-cyclical pause, such as the material, size, circumference, diameter, weight and / or temperature of the Me tall / hot coil and / or the metal strip thickness of the metal / hot collar.

The number of forward and backward rotations or the number of cycles as well as the number of further rotations can also be made dependent on one or more parameters, for example also on a material, a size, a Scope, a diameter, a weight and / or a temperature of the metal / hot collar and / or a metal strip thickness of the metal / hot collar.

The "very first / initial" rotation (in the first direction of rotation) is preferably carried out against a winding direction of the metal collar or the freshly wound hot collar.

Furthermore, it can expediently also be provided that an angle of rotation of the forward rotation and / or an angle of rotation of the (close) reverse rotation of the freshly wound hot coil and / or an angle of rotation of the further rotation depending on a material, a size, a circumference, a diameter, a Ge weight and / or a temperature of the metal bundle, in particular of the freshly wound hot bundle, and / or a metal strip thickness of the metal / hot bundle is / are set.

The rotation in the first direction of rotation and / or the rotation back in the second opposite direction of rotation and / or the further rotation in the first direction of rotation by a rotation angle from a range of approx. 22.5 ° to 135 °, in particular approx. 45 ° to 135 °, further in particular from approx. 75 ° to 105 °, further in particular also by approx. 90 °, he follows.

It is particularly useful when the rotation in the first direction of rotation and the reverse rotation in the second opposite direction of rotation or when the rotation in the first direction of rotation and the further rotation in the first direction of rotation takes place by the same angle of rotation.

Alternatively, different angles of rotation can also be carried out here. Furthermore, it can also be provided that before the beginning of the “very first / initial” turn in the first direction of rotation, there is likewise a — conscious — pause or rest phase

("Pre-pause"), such as the "cycle pause" or "intra-cycle pause" (within a cycle) or the "cycle pause" or

"Inter-cycle break" (between two cycles) is provided.

To put it another way, or to put it clearly, there is a waiting period - for example after the metal / hot coil has been pulled off a reel - until the "very first / initial" turn in the first direction of rotation or until the "very first / initial "cycle in which the metal / hot collar is started.

The "pre-pause" can be based on the appropriate parameters such as the cycle / intra-cycle pause or cycle pause

se / intermediate cycle pause, such as the material, the size, the circumference, the diameter, the weight and / or the temperature of the metal / hot collar and / or the metal strip thickness of the metal / hot collar, can be determined.

It can be particularly useful here if with the "very first / initial" turn (of the "very

th / initial "cycle) approx. 100 s to 300 s, in particular approx. 150 s to 250 s, further in particular approx. 200 s, after the unwinding of the metal / hot coil is started.

Regardless of this, it is advisable to start the "first / initial" turn (of the cycle or the "very first / initial" cycle) as early as possible.

It is also useful - in order to avoid mechanical damage to the metal / hot collar - that the backward and / or backward rotation and / or further rotation of the metal bundle, in particular the freshly wound warm bundle, takes place in such a way that the metal bundle, in particular the freshly wound warm bundle, is not rotated over a bundle beginning on an outer circumference of the metal bundle, in particular the freshly wound warm bundle.

According to a preferred development, it is provided that the method or the cycle or cycles after the metal / hot coil has been pulled off a reel and / or after or before binding, marking, measuring, weighing and / or inspecting (in General post-treatment) of the metal / hot collar

and / or before the metal / hot collar is deposited / will be carried out.

In other words, it can be provided that the metal bundle, in particular the freshly wound hot bundle, is withdrawn from a reel and / or subjected to intermediate treatment before the first cycle or the "very first / initial" twist and / or after the "last" cycle or the "very last / final" (close) reverse rotation or "very last

th / final "further rotation is / are intermediately treated and / or stored in a flange store.

In short, the process may take place between the withdrawal from the reel and the depositing in the collar store or between the reel and the collar store.

Furthermore, it can also be provided that the metal collar, in particular the freshly wound warm collar, is sampled and / or strapped and / or weighed and / or marked and / or measured.

The process is expediently carried out in the case of the metal / hot coil during / during a phase transformation of the metal / hot coil, in particular the phase transformation from austenite to ferrite.

In particular, it can also be expedient here for the method to be carried out for the metal / hot collar until the phase transformation of the metal / hot collar, in particular the phase transformation from austenite to ferrite, is complete.

If necessary, a certain follow-up of the process - "to be on the safe side" - can be carried out (during which the process is carried out beyond the end of the phase transition in the metal / hot coil) , a circumference, a diameter, a weight and / or a temperature of the metal bundle, in particular the freshly wound hot bundle, and / or a metal strip thickness of the metal / hot bundle can be set.

According to a further development, a transport device - for the metal / hot bundle - for example a pallet or a transport trolley (such as a Modular Coil Shuttle (MCS) Car) or possibly a walking beam system (or in combination with a walking beam system) is provided - with a flange support having at least one first rotatable and a second rotatable transport roller, in particular wherein at least one or (the) two (or - in the case of even more rotatable transport rollers - all of the) rotatable transport rollers can be driven.

This transport device can then, in particular when the transport rollers can be driven (or are driven), be used to carry out the method or its developments. Driven transport rollers can be implemented by (in the transport rollers) integrated drives / drive units, for example electric drives / motors (or hydraulic), or external (preferably mechanically) switchable / connectable drives / drive units.

Rollers or transport rollers can have the recesses in the area of Binderbän so that the Binderbands do not leave any pressure on the metal / hot collar.

By means of these transport roller drives, the forward and / or (closed) reverse rotation and / or further rotation can then be effected during the process.

Appropriately, a control is also provided which controls the drivable rollers or their drives in accordance with the method to be carried out. The control can - for given strip / collar parameters, such as in particular the material, the size, the circumference, the diameter, the weight and / or the temperature of the metal / hot collar and / or the metal strip thickness of the metal / hot collar, - Determine corresponding process parameters, such as, in particular, angle of rotation, speed of rotation, pause duration and / or direction of rotation - and control / carry out the process according to these.

Furthermore, a transport system - for the metal / hot bundle - can be provided - with a transport device, for example a pallet or a transport trolley (such as a Modular Coil Shuttle (MCS) car), with a bundle support, in particular having at least one first rotatable and a second rotatable transport roller, as well as with a transport station, for example a floor rolling station, with a collar support having at least a first rotatable and a second rotatable transport roller, with at least one or (the) two (or - in the case of even more rotatable Transport rollers at the transport station - all of the) rotatable transport rollers can be driven.

This transport system can then be used to carry out the method or its further developments.

In particular, it can then be provided here that the method is carried out on the transport station. The metal / hot bundle can then - for example in a kind of discharge station - be moved (temporarily) from the transport device to / into the transport station, where the process is carried out - and then (back) moved back into / on the transport device.

The transport device can in particular serve to transport the metal / hot coil after it has been pulled from the reel to the bundle storage, or in particular from the reel to the discharge station and from there on to the bundle storage.

Here, too, the control can again be provided which controls the drivable rollers or their drives in accordance with the method to be carried out.

In a further method for avoiding changes in shape in metal bundles, in particular for avoiding a collapse of freshly wound warm bundles, it is provided that a metal bundle, in particular a freshly wound warm bundle, moves continuously around its longitudinal axis in a first direction of rotation and in a second opposite direction of rotation is turned back, the back and forth turning more times takes place non-stop one after the other.

In other words, or to put it briefly and clearly, according to this additional process, the metal / hot coil is permanently turned back and forth without a break, i.e. without the cycle break / intra-cycle break and without the cycle break / inter-cycle break (between the rotations). In particular, what is prescribed and what is required, in particular to the rotations, such as the angle of rotation, and / or their control, apply accordingly to this further method.

In yet another method for avoiding changes in shape in metal coils, in particular to avoid a collapse of freshly wound warm coils, it is provided that a metal coil, in particular a freshly wound warm coil, during a transport process, in particular between pulling off a reel and a deposit in a flange store, is rotated without interruption about its longitudinal axis in one and the same direction of rotation, in particular in a winding-up direction of the metal collar.

Expressed differently or briefly and vividly, according to this further method, the metal / hot coil can be permanently, in particular slowly, for example at approx.> 5 min per revolution, in particular approx. 10 min per revolution, during the entire transport process between the reel and the flange storage or between the withdrawal from the reel and the Able conditions in the flange storage in one and the same direction, preferably in the winding direction, are rotated.

In particular, what is prescribed and further developed, in particular to the rotations, such as the angle of rotation, and / or their control, apply accordingly to this further method.

The previously given description of advantageous Ausgestaltun conditions of the invention contains numerous features, some of which are reproduced in the individual subclaims summarized in several. However, these features can expediently also be viewed individually and combined into meaningful further combinations. In particular, these features can each be combined individually and in any suitable combination with the method according to the invention. Even if in the description or in the claims some terms are used in the singular or in conjunction with a numerical word, the scope of the invention for these terms should not be restricted to the singular or the respective numerical word. Furthermore, the words "a" or "an" are not to be understood as numerals, but rather as indefinite articles.

The above-described properties, features and advantages of the invention and the manner in which they are achieved will become clearer and more clearly understood in connection with the following description of the exemplary embodiments of the invention, which are made in conjunction with the drawings / figures will be explained in more detail (the same construction parts / components and functions have the same reference numerals in the drawings / figures). The exemplary embodiments serve to explain the invention and do not limit the invention to combinations of features specified therein, not even with regard to functional features. In addition, suitable features of each exemplary embodiment can also be considered explicitly in isolation, removed from one exemplary embodiment, introduced into another exemplary embodiment to supplement it, and combined with any of the claims.

Show it:

1 shows a pallet system for performing a coil / bundle rotation according to a first embodiment;

2 shows an MCS system for carrying out a coil / bundle rotation according to a second embodiment; 3 shows a discharge station with a floor rolling station for carrying out a coil / bundle rotation according to a third embodiment.

Intermittent coil rotation, permanent uninterrupted coil - back and forth rotation and permanent coil rotation in one and the same direction during the transport process - to avoid a collapse / ovalization of a coil (Figures 1 to 3)

The embodiments described below according to FIGS. 1 to 3 show possibilities or realizations of how a collapse or ovalization in a freshly wound warm bundle 1 ("bundle" 1 or "coil" 1 for short) can be avoided.

The embodiments each relate to a section from the processing sequence in the production of a metal strip in a hot rolling mill.

The metal strips to be produced are - there is a trend in this regard - made of steels of new high, higher or very high strength steel grades, such as high carbon steels, press hardening steels, multi-phase steels or advanced high strength steel grade (AHSS) steels.

During the processing sequence in the production of the metal strip, it is necessary that the metal strip wound on a reel 10 to form the coil 1 or coil 1 after a hot rolling process, i.e. the freshly wound hot coil 1 or coil 1 (which / which usually has a temperature of up to 850 ° C and a weight of up to 50 t), away from the winder or the reel 10 and to various processing stations (14, 15) who must be transported. In the individual processing stations (14, 15) are the

Coils 1 reworked, for example bound 15, marked, weighed 14, measured and / or inspected, before they are stored in a bundle store 16.

For the transport process required here for the coil 1 - away from the reel 10 and towards the flange store 16 - a transport device 20 or a transport system 50 is required, which - in various versions - is to be described below.

Due to the ever stronger steel grades in the manufacture of metal strips, a phase transformation in the metal strip also takes place during this transport process, which phase transformation in turn leads to undesired volume changes and shape changes / deviations ("collapse" / "ovalization") during the transport process Coil 1 leads.

Intermittent coil rotation to avoid a collapse / ovalization of a coil

In order to prevent this ovalization of the coil 1, it is provided that the coil 1 to be transported during the transport process - away from the reel 10 towards the flange storage 16 - possibly several times - intermittently (about its longitudinal axis 2) back 3 and ( is turned back) 4 (or alternatively further turned 17).

Transport devices / systems described below are set up for such coil treatment / rotation 3, 4 (16, 17) - and can thus contribute to avoiding the coil 1 from collapsing or ovalizing.

Pallet (circulating) system 30 (FIG 1) 1 shows a pallet 20 of a pallet circulation system 30, which pallet circulation system 30 transports coils 1 away from the reel 10 to the bundle store 16 by means of pallets 20 moved by pallet circulation vehicles on a conveyor line 31.

Here, the coils to be transported are loaded onto the respective pallet carriages along their longitudinal axis.

For this purpose, a freshly wound hot coil 1 or the coil 1 is drawn off 11 from the reel 10 and placed on the pallet 20, as shown in FIG. 1. The pallet 20 is moved via the conveyor line 31 (possibly via the processing stations 14, 15) to the flange store 16 in which the

Coil 1 is then deposited, as a result of which the coil 1 is or has been transported from the reel 10 to the coil store 16.

As FIG 1 shows, the pallet 20 provides a collar support 21 in the form of a support saddle 24 on which the coil 1 to be transported is deposited or, as FIG. 1 shows, is deposited.

This support saddle 24 has, as FIG. 1 also shows, two saddle supports 25, 26 arranged at a distance from one another, each of which preferably has a roller 22, 23 that can be driven by means of an integrated drive 27 (not visible).

By means of corresponding adjustment systems 32 on the pallet 20 or on the seat posts 25, 26 (not visible), the two rollers 22, 23 forming the flange support 21 / flange saddle 24 can be moved horizontally and vertically, whereby the height and / or spacing of the rollers 22, 23 adjusted - and so the Bundle support 21 can be adapted to the coils 1 to be transported.

The integrated drives 27 of the rollers 22, 23 carrying the coil 1 are activated by means of a control 29 so that the coil 1 deposited on them can be rotated about its longitudinal axis 2 - controlled -.

The coil rotation 3, 4 (16, 17) takes place according to a predefinable cycle regime which - if necessary several times - provides an intermittent 3 and 4 (closed) reverse rotation 4 (or alternatively further rotation 17) ("cycle").

The controller 29 determines the corresponding rotation parameters, such as the start of rotation, direction of rotation 5, 6, duration of a

Rotation, pause between two rotations, rotation speed, rotation angle 8, 9, number of rotations / cycles, start / end of the entire cycle and much more. - Depending on the Ma terials, the size, the circumference, the diameter, the Ge weight and the temperature as well as the metal strip thickness of the coil 1 - and regulates the integrated drives 27 of the rollers 22, 23 accordingly.

Possible cycle or rotation regimes can be carried out as follows:

1.

Steel quality: high / higher / ultra-high strength steel, e.g. AHSS steel coil weight: 20 t - 30 t

Start of the turning regime: 1 min after pulling off the pod 10 (11)

Number of cycles: 10

Cycle pause / intra-cyclical pause between the forward 3 and the (closed) reverse rotation 4 (or the further rotation 17): 1 min Break between two cycles / cycle break or intermediate cycle break: 1 min

Angle of rotation 8 of the rotation 3: 90 °

Angle of rotation 9, 18 of the (closed) reverse rotation 4 or the Weiterdre hung 17: 90 °

First / initial direction of rotation 5: preferably against winding direction 7

Note: Preferably no rotation 3, 4, 17 over the beginning of the collar / tape 12 on the outer circumference 13. Post-processing and intermediate processing 14, 15 are carried out after completion of the cycle or

Rotation regimes.

2.

Steel quality: high / higher / ultra-high strength steel, e.g. high carbon steel

Coil weight: 30 t - 45 t

Start of the rotation regime: 200 sec after pulling off the capsule 10 (11)

Number of cycles: 15

Cycle pause / intra-cycle pause between the forward 3 and the (closed) reverse rotation 4 (or the further rotation 17): 1.5 min

Break between two cycles / cycle break or intermediate cycle break: 1.5 min

Angle of rotation 8 of the rotation 3: 75 °

Angle of rotation 9, 18 of the (closed) reverse rotation 4 or the Weiterdre hung 17: 75 °

First / initial direction of rotation 5: preferably against winding direction 7

Rotation regimes. 3.

Steel quality: high / higher / ultra-high strength steel, e.g. Multiphase steel

Coil weight: 25 t - 40 t

Start of the turning regime: 10 sec after pulling off the capsule 10 (11)

Number of cycles: 8 or until completion of the phase change cycle pause / intra-cyclical pause between the forward 3 and the (closed) reverse rotation 4 (or the further rotation 17): 2 min

Break between two cycles / cycle break or intermediate cycle break: 2 min

Angle of rotation 8 of the rotation 3: 90 °

First / initial direction of rotation: preferably against the winding direction 7

Rotation regimes.

MCS system 33 (FIG 2)

FIG. 2 shows a transport trolley 20, a "Modular Coil Shuttle (MCS) Car" (MSC for short) 20, by means of which coils 1 (transported over the conveyor line 31 away from the reel 10 to the flange storage 16 (and also rotated 3, 4, 17).

For this purpose - according to the pallet circulation system 30 (FIG 1)

- A freshly wound hot coil 1 or the coil 1 is drawn off 11 from the reel 10 and placed on the MCS 20, as shown in FIG. light, filed. The MCS 20 is moved (if necessary via the processing stations 14, 15) to the coil storage 16, in which the coil 1 is then deposited, whereby the coil 1 is or has been transported from the reel 10 to the coil storage 16.

As FIG 2 shows, the MCS 20 - corresponding to the pallet 20 (FIG 1) - provides a support saddle 24 (as a collar support 21) on which the coil 1 to be transported is deposited or, as FIG. 2 shows, is deposited.

For this purpose, as FIG. 2 also shows, this support saddle 24 has two seat posts 25, 26 arranged at a distance from one another, each of which has a roller 22, 23 that can be driven by means of an integrated drive 27 (not visible).

By means of corresponding adjustment systems 32 in the MCS 20 or in the seat posts 25, 26 (indicated, FIG. 2), the two rollers 22, 23 forming the flange support 21 / flange saddle 24 can be moved horizontally and vertically, whereby the height and / or spacing of the rollers 22, 23 adjusted - and so the coil support 21 can be adapted to the coils 1 to be transported.

The integrated drives 27 of the rollers 22, 23 carrying the coil 1 are activated by means of a controller 29 so that the coil 1 deposited on them can be rotated 3, 4, 17 about its longitudinal axis 2 - controlled -.

The coil rotation 3, 4, 17 takes place according to a predefinable

Cycle regime (cf. this in the case of the pallet circulation system 30), which - if necessary several times - provides an intermittent forward 3 and (closed) reverse rotation 4 or further rotation 17 ("cycle"). The controller 29 determines the corresponding rotation parameters (see above for the pallet circulation system 30), such as start of rotation 3, 4, 17 angle of rotation 8, 9, 18 direction of rotation 5, 6, duration of a rotation 3, 4, 17 duration of pause between two rotations ,

Rotation speed, number of rotations / cycles, start / end of the entire cycle and much more. - depending on the material, the size, the circumference, the diameter, the weight and the temperature as well as the metal strip thickness of the coil - and regulates the integrated drives 27 of the rollers 22, 23 accordingly.

Possible cycle or rotation regimes are as described above.

As an alternative (not shown) with the pallet circulation system 30 and the MCS system 33 - with integrated driven rollers there - rollers 22, 23, rollers 22, 23 can also be provided on the pallet 20 or the MCS 20, which can be provided by external , couplable drives 28 are driven.

For this purpose, one or more stations can be provided along the transport path 31 or in connection with the transport path 31, which establish a mechanical connection with the Rol len 22, 23 and a rotation 3, 4, 17 of the rollers 22, 23 and thus the Apply coils 1.

- Discharge station 52 with floor roller station 51 (FIG 3)

3 shows a detail of a conveyor section 31 in a hot rolling mill for producing a metal strip.

As FIG. 3 shows, here coils 1 are drawn off from two reels 10 onto a transport carriage 20 and via a "circular route" 34 to post-processing or intermediate processing stations 14, 15

(here weighing station 14 and strapping station 15) transported (before they are then transported to a flange store 16 and stored there (not shown or only indicated)).

Are along the circuit 34, as Figure 3 shows, - in this case - two floor rolling stations 51 are arranged (indicated).

These floor rolling stations 51 are - corresponding to the pallet 20 (FIG 1) and the MCS 20 (FIG 2) - equipped with driven rollers 22, 23 (with integrated drives 27), whereby there applied coils 1 - according to a specific

Rotation regimes (see above) - can be rotated 3, 4, 17.

Coils 1 moved to the floor rolling stations 51 are temporarily removed there from the transport trolley 20 and shifted to the respective floor rolling station 51, where they are rotated according to a certain rotation regime (see above). After the end of the rotation regime, the coils 1 are relocated back to the transport carriage 20 and transported on.

Permanent coil - turning back and forth to avoid collapsing / ovalizing a coil

To avoid the disadvantageous ovalization of a coil 1 described above, the MCS 20 described above can also be used according to a rotation regime as follows (see FIGS. 1 to 3).

The coil is here rotated back around its longitudinal axis 2 in the first direction of rotation 5 3 and without a break, ie without the "cycle pause" / "inner-cyclical break", in the second opposite direction of rotation 6, with the back 3 and the To turn back 4 several times without pause, ie without the "cycle pause" / "intermediate cycle pause", takes place one after the other. Regime parameters relating to this can be set:

Start of the turning regime: at the beginning of the transport process, 1 min after pulling off the capsule 10 (11)

End of the rotation regime: with the end of the transport process at Bundlager 16

Number of Cycles: Multiple

Cycle pause / intra-cycle pause between the forward 3 and the (closed) reverse rotation 4: none

Break between two cycles / cycle break or intermediate cycle break: none

Angle of rotation 8 of the rotation 3: 90 °

Angle of rotation 9 of the (closed) reverse rotation 4: 90 °

First / initial direction of rotation 5: preferably against winding direction 7

Note: Preferably no rotation 3, 4 over the collar / tape beginning 12 on the outer circumference 13. Post-processing and intermediate processing 14, 15 take place after the rotation regime has been completed.

Permanent, slow coil - turning in one and the same direction of rotation during the entire coil transport to avoid collapsing / ovalizing a coil

During the entire transport process between the withdrawal 11 from the reel 10 and the depositing in the flange store 16, the coil is in an uninterrupted manner around its longitudinal axis 2 and the same direction of rotation 35 rotated 19 in the winding direction 7 of the coil 1.

Regime parameters can be set:

Steel quality: high / higher / ultra-high strength steel, e.g. AHSS steel coil weight: 20 t - 30 t Start of the turning regime: at the start of the transport process, 1 min after being pulled from the capsule 10 (11)

Number of cycles: none, rotation only in winding direction. Rotation speed: slow (for example at 10 min per revolution).

List of reference symbols

1 metal collar, warm collar, coil, collar

2 longitudinal axis

3 turn

4 (close) reverse rotation

5 first direction of rotation of the forward rotation or further rotation

6 second opposite direction of rotation of the (close) reverse rotation

7 Winding direction

8 rotation angle of the rotation

9 Angle of rotation of the (close) reverse rotation

10 reel

11 Pulling off a reel

12 beginning of the fret

13 outer circumference

14 Weighing (weighing station)

15 binding, strapping (binding station)

16 flange bearings

17 Further rotation

18 Angle of rotation for further rotation

19 (permanent, uninterrupted) rotation

20 Transport device, transport trolley, pallet, MCS car

21 Federal edition

22 first (driven / drivable) (transport) roller

23 second (driven / drivable) (transport) roller

24 collar / support saddle

25 first seat post

26 second seat post

27 integrated drive

28 external (connectable) drive unit

29 Control

30 pallet circulation system

31 Conveyor / transport line Adjustment system

MCS system

Circuit

one and the same direction of rotation transport system

Transport station, floor rolling / floor turning station, discharge station

Claims

1. A method for avoiding changes in shape in Metallbun the (1), wherein

- The metal collar (1) about its longitudinal axis (2) intermittently in a first direction of rotation (5) backwards (3) and then rotates back (4) in a second opposite direction of rotation (6) or rotated further in the first direction of rotation (5) ( 17) will, and

- The rotation (3) in the first direction of rotation (5) takes place against a winding direction (7) of the metal collar (1), and

- The forward (3) and / or (closed) reverse rotation (4) and / or the further rotation (17) of the metal collar (1) takes place in such a way that the metal collar (1) does not have a collar start (12) on one Outer circumference (13) of the metal collar (1) is rotated, and

- between the outward (3) and the subsequent (incoming

) Reverse rotation (4) of the metal collar (1) or between the outward (3) and the subsequent further rotation (17) of the metal collar (1) a rest period takes place.

2. The method according to claim 1,

characterized in that

the metal collar (1) is a freshly wound warm collar (1).

3. The method according to claim 1 or 2,

characterized in that

the metal collar (1) is rotated several times backwards (3) and back (4) or the metal collar (1) is rotated backwards (3) and rotates several times (17).

4. The method according to at least one of the preceding claims,

characterized in that

an angle of rotation (8) of the forward rotation (3) and / or an angle of rotation (9) of the (closed) reverse rotation (4) and / or an angle of rotation (18) of the Further rotation (17) of the metal collar (1) is set as a function of a material of the metal collar (1).

5. The method according to at least one of the preceding claims,

characterized in that

a rest period between the forward (3) and the subsequent (closed) reverse rotation (4) of the metal collar (1) and / or a rest period between the forward (3) and the subsequent further rotation (17) of the metal collar (1 ) is set depending on a material than the metal collar (1).

6. The method according to at least one of the preceding claims,

characterized in that

a start of the rotation (3) of the metal collar (1) after it has been drawn off a reel (11) is set as a function of a material as the metal collar (1).

7. The method according to at least one of the preceding claims,

characterized in that

the forward rotation (3) in the first direction of rotation (5) and / or the (closed) reverse rotation (4) in the second opposite direction of rotation (6) and / or the further rotation (17) in the first direction of rotation (5) by one Rotation angle (8, 9, 18) takes place from a range of approx. 45 ° to 135 °.

8. The method according to at least one of the preceding claims,

characterized in that

the forward rotation (3) in the first direction of rotation (5) and the (closed) reverse rotation (4) in the second opposite direction of rotation (6) and / or the further rotation (17) in the first Direction of rotation (5) by the same angle of rotation (8, 9,

18) takes place.

9. The method according to at least one of the preceding claims,

characterized in that

a rest period between the forward (3) and the subsequent (closed) reverse rotation (4) of the metal collar (1) or between the forward (3) and the subsequent further rotation (17) of the Me tallbundes (1) with a duration a range of approx.

100 s to 300 s.

10. The method according to at least one of the preceding claims,

characterized in that

with an initial rotation (3) of the metal collar (1) about 100 s to 300 s after pulling it off a reel (11) be started.

11. The method according to at least one of the preceding claims,

characterized in that

the metal collar (1) consists of a high-carbon steel, a press-hardening steel, a multi-phase steel or an Advanced High Strength Steel Grade (AHSS) steel.

12. The method according to at least one of the preceding claims,

characterized in that

the metal collar (1) is withdrawn (11) and / or tied (15) and / or weighed (14) from a reel (10) before turning (3) and / or the metal collar (1) after (closing) Turning back (4) or after turning further (17) is stored in a flange bearing (16).

13. The method according to at least one of the preceding claims,

characterized in that

the metal collar (1) is sampled and / or strapped (15) and / or weighed (14) and / or marked and / or measured.

14. The method according to at least one of the preceding claims,

carried out

during a phase change of the metal collar (1) from austenite to ferrite.

15. Transport system (50) with a transport device (20) with a collar support (21) having at least one first rotatable and one second rotatable transport roller (22, 23) as well as with at least one external drive unit (28) which is mechanically connected to one of the rotatable Transport rollers (22, 23) can be coupled to drive this transport roller (22, 23)

for performing a method according to one of the preceding the method claims.