EP3946772B1 - Method for avoiding shape changes in metal coils, in particular for preventing collapse of freshly coiled warm coils - Google Patents

Description

The invention relates to a method for avoiding changes in shape in metal coils, in particular for avoiding a collapse of freshly wound hot coils, which collapse can occur, for example, in the production of steel products such as metal strips in hot rolling mills or hot rolling mills.

In steel production there is a trend towards the production of increasingly high, higher and ultra-high-strength steel grades, and this also applies to 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.

Because of the always high, higher and maximum strength steel grades, a phase transformation of the steel product, for example from austenite to ferrite, can take place not only in a cooling section of a hot rolling mill, but also - following the cooling section - in a coiler (in which the steel /metal strip following a rolling step/rolling process - freshly wound - is wound into a hot coil or coil), during transport - of the freshly wound hot coil that has been drawn off the coiler (and possibly also already bound) - to a coil store or in a coil store hot rolling mill (in which the freshly coiled hot coil is stored) occur ("delayed phase transformation"), especially for grades that are subsequently cold-rolled.

Phase transformations in the product, such as the metal coil or the freshly wound hot coil, in turn lead to volume changes and shape changes/deviations ("collapse") there, which are undesirable and/or lead to serious problems, especially during coil transport and in further processing systems (e.g. there when winding on a decoiler mandrel). A special form of this collapsing in a steel product is so-called "ovalization", in which - here in the case of a metal/hot bundle or coil - a change in shape/deviation from an initially (approximately) round shape to an oval shape takes place.

In the case of metal strips with such special steel grades, e.g. high-carbon steels, press-hardened steels or multi-phase steels, or during the production of such metal strips, it is possible, particularly during coiling or during coil transport, where the metal strip is in the form of a (wound) bundle or coil delayed phase transformation and thus to the volume change or shape change in the product or bundle / coil, d. H. the (undesirable) collapsing or ovalizing.

From the EP 1 683 588 B1 discloses a device for transporting very heavy metal strip coils produced by winding rolled metal strips after rolling operations. This device comprises pallets used in a circulating system and roller tables that convey them further. A pallet consists of spaced-apart longitudinal beams and a bridging collar support saddle, which has opposite supports including a support bracket.

In order to enable an operationally reliable transport system despite the cumulative influences of load and heat, the pallet for transporting a bundle is designed with contouring at least of its longitudinal members that is precalculated to compensate for vertical and horizontal deformation under load and the influence of heat.

From the KR101695986 B1 Another device for transporting metal coils, ie a so-called "coil car", is known. In order to bring a metal bundle into a desired position on the transport device, rotatable support rollers are provided on the transport device, through which a metal bundle resting on it can be rotated into the desired position.

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

From the US 4,271,959A , which forms the basis for the preamble of claim 1, is based on the walking beam principle device for removing freshly wound hot coils from the outlet coiler of a hot rolling mill is known. During transport by means of a large number of movable but stationary mechanical actuators, the bundles are also rotated by a certain angle about their longitudinal axis 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 lead to damage to the peripheral surface of the collars. It is also possible for a bundle to come to rest on its outer end of the strip during the transport process, which is due to its own weight the bundle can lead to mechanical impressions in the underlying winding layers.

The KR 101 036 318 B1 discloses a conversion device for bundles, by means of which a change in shape (ovalization) of the bundles can be reversed. A first conveyor belt with support devices for individual bundles transports them one after the other to a lifting station, where a single bundle is picked up by a vertically height-adjustable and laterally movable lifting carriage and transferred to a second, similar conveyor belt. If necessary (ovalization), the bundle in question can be temporarily set down by the lift truck during the transfer process onto a group of rotary driven rollers, where it is rotated by these by 90° so that the ovalization is compensated. Although an already existing collar deformation can be compensated for with the disclosed invention, due to the turning process occurring only at one point it is not possible to prevent a disadvantageous deformation from the outset or to counteract such a deformation during the entire transport process.

The KR 2012 0121518 A discloses a transport carriage that can be moved in one direction and has four support rollers for receiving a hot coil. For the purpose of rotating a bundle located on the transport carriage, at least two axially opposite support rollers are each connected to a drive attached to the transport carriage, with the drives having to be synchronized. In order to stop the turning process abruptly (eg due to an emergency situation), braking devices attached to the transport vehicle are also provided. To correct a collar deformation (ovalization), the KR 101 036 318 B1 suggest turning the collar on the transport carriage by 90°. It is true that with the transport carriage disclosed ovalization of a federal government located on it can be counteracted be, but the rotary drives and brakes require an increased dead weight and an increased design and energy expenditure for a bundle transport.

The KR 101 420 629 B1 proposes a spreading device in combination with a stationary coil depositing device with rotary-driven support rollers, onto which an ovalized coil is first deposited. The spreading device is inserted into the collar eye in a horizontal orientation, then both parts are rotated by 90°. Due to its own weight, the oval collar sags in the vertical direction until the spreading device blocks further sagging. Subsequent cooling stabilizes the collar, which has been corrected in shape in this way, so that the expanding device collapses and can be removed from the collar eye again. Again, although it is possible to restore an originally round bundle shape, it cannot be prevented from the outset and can only be carried out selectively, ie not during bundle transport.

The JP 2010 207836 A proposes a transport carriage with rotary-driven support rollers to prevent changes in shape of a coil at elevated temperature, whereby the coil is rotated continuously during the transport process on the transport carriage with at least 1 revolution per minute and the rotary movement is stopped at least 30 seconds before the coil is transferred to the coiler subsequent processing station is started. It is true that deformation of the collar can be avoided in this way, but the continuous rotary movement of the collar leads to unnecessarily high wear and tear on the outer surface of the collar, especially during longer transport processes.

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

This object is achieved by methods for avoiding changes in shape in metal coils, in particular for avoiding a collapse of freshly wound hot 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 of dependent claims and the following description.

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

"Metal coil" (usually just "coil" for short) refers to a metal product produced by winding a metal strip.

"Freshly coiled" may refer to a metal coil which is produced by coiling a rolled metal strip after a rolling process.

"Hot bundle" may refer to a metal coil formed from hot-rolled metal strip.

"Intermittent", in general meaning as "running with an interruption/pause", means that between the forward and (backward) rotation or between the forward and further rotation a - conscious or consciously/deliberately inserted/ set - temporal (shooting) interruption/(shooting) pause (short interruption/pause) takes place.

The forward rotation, the interruption/pause and the (towards) reverse rotation or further rotation are also often simply referred to below as (a) "cycle".

This "deliberate" or "deliberately inserted" pause (between the forward and (toward) reverse rotation or between the forward and further rotation) is such a - targeted - pause (hereinafter also referred to as "cycle pause"/" intra-cyclic pause"), which can be a mere reversal of the direction of rotation (when rotating to and fro) by a "mere" switchover between the directions of rotation or which can be achieved by a mere (brief), particularly unintentional, hesitation between the and the further rotation goes beyond.

In this context, deliberately 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 unintentional stoppage), in particular as a function of one or more specific parameters. This means that turning to and fro or turning to and fro is specifically interrupted for a predefinable pause.

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

It is harmless if the cycle of the metal/hot coil is superimposed by another action/manipulation of the metal/hot coil, for example a translational movement of the metal/hot coil - during the cycle.

In particular, the duration of the pause (or rest duration/length of the rest phase) between the forward and reverse rotation or between the forward and further rotation can be selected depending on the material of the metal coil, in particular the freshly wound hot coil (i.e. thus consciously - depending on the material - selected/set).

A parameter determining the pause duration or rest duration/phase can also be a size, a circumference, a diameter, a weight and/or a temperature of the metal coil, in particular the freshly wound hot coil, and/or a thickness of the metal/hot coil be wound metal tape.

Several parameters or several parameters in combination can also be used to determine the pause duration or rest duration/phase between the outward and (toward) reverse rotation or the outward and further rotation or can be used when determining the pause duration or rest period/phase can be consulted or used.

In particular, the pause duration or the rest duration/phase between the forward and (closed) reverse rotation or the forward and further rotation of the metal bundle, in particular the freshly wound hot coil, can be in a range (min./max. pause duration ) from about 50 s to 300 s, in particular 100 s to 300 s, further in particular from about 150 s to 250 s are or (set) to be.

An appropriate pause duration of approx. 200 s can also be provided - for metal products.

The method is based on the knowledge gained that the cycle, i. H. the intermittent to-and-fro rotation or to and fro rotation of the metal/hot coil ensures that the phase transformation in the metal coil or freshly wound hot coil has no significant effect on the shape of the coil. This circumstance 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 in shape/deviations of the relevant bundle, but these occur in discrete steps, namely, for example, when a critical value of the static friction between adjacent turns of the Federal is undercut. In other words, the waistband slips under its own weight piece by piece. A continuous change in the spatial orientation of the bundle to maintain the original winding shape is therefore not absolutely necessary.

Because of the cycle, the metal/hot coil moves into modified, in particular "antipodal" layers/positions in which changes in shape that occur in the metal/hot coil (due to the effects of gravity) are "compensated for".

Therefore D. H. By compensating for changes in shape in the metal/hot coil during intermittent turning back and forth or intermittent turning back and forth, collapsing or ovalizing of a metal coil, in particular a freshly wound hot coil, can be counteracted.

Problems in this regard, such as those that can occur, for example, when winding on a decoiler mandrel (if the waistband to be pulled up has collapsed/ovalized) can be avoided in this way.

Appropriately, it can also be provided that the metal bundle, in particular the freshly wound hot bundle, is turned back and forth several times or turned further several times, for example two, three, four or even more times, which in particular is important for developing or maintaining a round shape of the metal/hot collar is conducive. In short, several cycles are run with the metal/hot coil.

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

It is also useful that such a - deliberate - pause/interruption, such as the "cycle pause" (within a cycle) or "inner-cycle pause", also occurs between two cycles (briefly here then "cycle pause" or "inter-cycle pause") or between two further rotations (also here "cycle pause" or "intercycle pause" for short) is provided (all of which are then intermittent processes).

The cycle pause or inter-cycle pause can be determined according to the corresponding parameters such as the cycle pause or intra-cycle pause, such as the material, the size, the circumference, the diameter, the weight and/or the temperature of the metal/hot coil and/or the metal strip thickness of the metal /warm waistband, to be determined.

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

The “very first/initial” rotation (in the first direction of rotation) preferably takes place counter to a winding direction of the metal bundle or the freshly wound hot bundle.

Furthermore, it can expediently also be provided that an angle of rotation of the forward rotation and/or an angle of rotation of the (closed) back rotation of the freshly wound hot coil and/or an angle of rotation of the further rotation depending on a material, size, circumference, diameter, 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 forward rotation in the first direction of rotation and/or the reverse rotation in the second opposite direction of rotation and/or the further rotation in the first direction of rotation by an angle of rotation from a range of approx. 22.5° to 135°, in particular from approx. 45° up to 135°, further in particular from approx. 75° to 105°, further in particular also by approx. 90°.

It is particularly expedient if the outward rotation in the first direction of rotation and the reverse rotation in the second opposite direction of rotation or if the outward rotation in the first direction of rotation and the further rotation in the first direction of rotation each take place at 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 start of the "very first/initial" rotation in the first direction of rotation, such a - deliberate - pause or rest phase ("pre-pause"), such as the "cycle pause" or "inner-cyclic pause" (within a Cycle) or the "cycle pause" or "intercycle pause" (between two cycles) is provided.

In other words, or to put it more clearly, it is - for example after the metal/hot coil has been pulled off a reel - waited for a certain period of rest until the "very first/initial" rotation in the first direction of rotation or until the "very first/initial " Cycle at which metal/hot bundle is started.

The "pre-pause" can be based on the relevant parameters such as the cycle/inter-cycle pause or cycle pause/inter-cycle pause, such as the material, size, circumference, diameter, weight and/or temperature of the metal/hot coil and/or the Metal strip thickness of the metal/hot bundle can be determined.

It can be expedient here in particular if the "very first/initial" rotation (of the "very first/initial" cycle) is approx. 100 s to 300 s, in particular approx. 150 s to 250 s, further in particular approx. 200 s , after the peeling off of a reeling off of the metal/hot coil is started.

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

It is also expedient - in order to avoid mechanical damage to the metal/hot coil - that the forward and/or reverse rotation and/or further rotation of the metal coil, in particular of the freshly wound hot bundle, takes place in such a way that the metal bundle, in particular the freshly wound hot bundle, is not rotated over a start of the bundle on an outer circumference of the metal bundle, in particular of the freshly wound hot bundle.

According to a preferred development, it is provided that the method or cycle or cycles after the metal/hot coil has been pulled off a coiler and/or after or before binding, marking, measuring, weighing and/or inspecting (generally post-treatment) of the metal/warm band and/or before the metal/warm band is put down.

In other words, it can be provided that the metal coil, in particular the freshly wound hot coil, is drawn off from a coiler and/or intermediately treated before the first cycle or the "very first/initial" turning and/or after the "last" cycle or The "last/ultimate" (toward) reverse rotation or "last/ultimate" further rotation is/are intermediately treated and/or deposited in a bundle storage area.

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

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

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

It can also be particularly expedient here for the method to be carried out on the metal/hot coil until the phase transformation of the metal/hot coil, in particular the phase transformation from austenite to ferrite, is complete.

If necessary, a certain follow-up of the process - "for safety's sake" - can also be carried out (during which the process is carried out beyond the end of the phase transformation in the metal/hot coil). A follow-up time can in turn be set depending on a material, size, circumference, diameter, weight and/or temperature of the metal coil, in particular the freshly wound hot coil, and/or a metal strip thickness of the metal/hot coil.

According to a further development, a transport device—for the metal/hot coil—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 coil support having at least one first rotatable and one 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 be used to carry out the method or its developments, in particular if the transport rollers can be driven (or are driven).

Driven transport rollers can be realized by drives/drive units integrated (in the transport rollers), for example electric drives/motors (or hydraulically), or external (preferably mechanically) switchable/connectable drives/drive units.

Rollers or transport rollers can have recesses in the area of binder strips so that the binder strips do not leave any impressions on the metal/hot bundle.

By means of these transport roller drives, the forward and/or (towards) reverse rotation and/or further rotation can be brought about during the process.

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

Furthermore, a transport system - for the metal/hot coil - can also be provided - with a transport device, for example a pallet or a transport trolley (such as a modular coil shuttle (MCS) car), with a coil support, in particular having at least a first rotatable and a second rotatable transport roller, and with a transport station, for example a floor roller station, with a collar support having at least one first rotatable and one 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 developments.

In particular, provision can then be made here for the method to be carried out on the transport station. The metal/hot bundle can then be moved from the transport device (temporarily) to/into the transport station, for example in a sort of ejection station, where the process is carried out, and then moved (back) to/on the transport device.

The transport device can be used in particular to transport the metal/hot coil after it has been pulled off the coiler to the coil store, or in particular from the coiler to the discharge station and from there on to the coil store.

Again, the controller can be provided here, which controls the drivable rollers or their drives according to the method to be carried out.

In a further method for avoiding changes in shape of metal coils, in particular for avoiding the collapse of freshly wound hot coils, it is provided that a metal coil, in particular a freshly wound hot coil, rotates around its longitudinal axis in a first direction of rotation and non-stop in a second, opposite direction of rotation is turned back, with the turning back and forth several times without a break in a row.

In other words, to put it briefly and clearly, after this further process the metal/hot coil is permanently turned back and forth without a break, ie without the cycle break/inner-cycle break and without the cycle break/inter-cycle break (between the turns).

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

In yet another method for avoiding changes in shape of metal coils, in particular for avoiding the collapse of freshly wound hot coils, it is provided that a metal coil, in particular a freshly wound hot coil, during a transport process, in particular between being drawn off from a coiler and being deposited in a collar bearing, is rotated about its longitudinal axis without interruption in one and the same direction of rotation, in particular in a winding direction of the metal coil.

In other words, to put it briefly and clearly, after this further process the metal/hot coil can be permanently, particularly slowly, for example approx. >5 minutes per revolution, particularly approx be rotated in one and the same direction, preferably in the winding direction, from the flange bearing or between being pulled off the coiler and deposited in the flange bearing.

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

The properties, features and advantages of the invention described above 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 will be explained in more detail in connection with the drawing(s)/figures will/will (same parts/components and functions have the same reference numbers in the drawings/figures). The exemplary embodiments serve to explain the invention and do not limit the invention to the combinations of features specified therein, not even in relation to functional features.

FIG 1

ein Palettensystem für die Durchführung einer Coil-/Bunddrehung gemäß einer ersten Ausführung;

FIG 2

ein MCS-System für die Durchführung einer Coil-/Bunddrehung gemäß einer zweiten Ausführung;

FIG 3

eine Ausschleusestation mit einer Bodenrollstation für die Durchführung einer Coil-/Bunddrehung gemäß einer dritten Ausführung.

Show it:

FIG 1

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

FIG 2

an MCS system for performing a coil/coil rotation according to a second embodiment;

3

a discharge station with a floor roller station for performing 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 collapsing / ovalization of a coil (Figures 1 to 3)

The embodiments according to FIGS. 1 to 3 described below show possibilities or realizations of how collapsing or ovalization in a freshly wound hot bundle 1 (“bund” 1 or “coil” 1 for short) can be avoided.

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

The metal strips to be manufactured are - is there a trend in this regard - from steels of new high, higher or maximum 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 for the metal strip wound after a hot-rolling process on a coiler 10 to form the bundle 1 or coil 1, ie the freshly wound hot bundle 1 or the coil 1 (which usually has a temperature of up to 850°C and a weight of up to 50 t) has to be transported away from the winding or coiler 10 and towards various processing stations (14, 15).

The bundles/coils 1 are post-processed in the individual processing stations (14, 15), for example bound 15, marked, weighed 14, measured and/or inspected before they are deposited in a bundle store 16.

A transport device 20 or a transport system 50 is required for the transport process required for the coil 1 - away from the coiler 10 and towards the coil store 16 - which will be described below - in various versions.

Due to the increasingly strong steel grades in the production of metal strips, a phase transformation in the metal strip also takes place during this transport process, which phase transformation in turn leads to undesirable volume changes and changes in shape/deviations ("collapse"/"ovalization") in coil 1.

Intermittent coil rotation to avoid coil collapse/ovalization

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 coiler 10 towards the coil store 16 - if necessary several times - intermittently (about its longitudinal axis 2) back 3 and (towards) turned back 4 (or alternatively turned further 17).

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

- Pallet (circulation) system 30 (FIG 1)

FIG 1 shows a pallet 20 of a pallet circulating system 30, which pallet circulating system 30 transports coils 1 away from the coiler 10 to the coil store 16 by means of pallets 20 moved on a conveyor line 31 by pallet circulating carriages.

The coils to be transported are loaded along their longitudinal axis onto the respective pallet car.

For this purpose, a freshly wound hot bundle 1 or the coil 1 is pulled off the coiler 10 11 and placed on the pallet 20, such as FIG 1 clarified, filed. The pallet 20 is moved via the conveyor line 31 (possibly via the processing stations 14, 15) to the coil store 16, in which the coil 1 is then deposited, whereby the coil 1 is then transported from the coiler 10 to the coil store 16 or has been.

How FIG 1 shows, the pallet 20 provides a bundle support 21 in the form of a support saddle 24, on which the coil 1 to be transported is placed or, as FIG 1 shows is filed.

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

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

The integrated drives 27 of the rollers 22, 23 carrying the coil 1 are controlled by a controller 29, so that the coil 1 placed on them can be rotated about its longitudinal axis 2—controlled.

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

For this purpose, the controller 29 determines the corresponding rotation parameters, such as the start of the rotation, direction of rotation 5, 6, duration of a rotation, pause time between two rotations, rotation speed, rotation angle 8, 9, number of rotations/cycles, start/end of the overall cycle and many 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 1 - and regulates the integrated drives 27 of the rollers 22, 23 accordingly.

1. 1.
   • Stahlgüte: hoch-/höher-/höchstfester Stahl, z.B. AHSS-Stahl Coilgewicht: 20 t - 30 t
   • Beginn des Drehregimes: 1 min nach dem Abziehen vom Hapsel 10 (11)
   • Anzahl der Zyklen: 10
   • Zykluspause/innerzyklische Pause zwischen der Hin- 3 und der (Zu-)Rückdrehung 4 (bzw. der Weiterdrehung 17): 1 min
   • Pause zwischen zwei Zyklen/Zyklenpause bzw. Zwischenzyklenpause: 1 min
   • Drehwinkel 8 der Hindrehung 3: 90°
   • Drehwinkel 9, 18 der (Zu-)Rückdrehung 4 bzw. der Weiterdrehung 17: 90°
   • Erste/anfängliche Drehrichtung 5: vorzugsweise entgegen Aufwickelrichtung 7
   • Beachte: Erfindungsgemäß keine Drehung 3, 4, 17 über den Bund-/Bandanfang 12 am Außenumfang 13. Nach- und Zwischenbearbeitungen 14, 15 erfolgen nach Abschluss des Zyklus- bzw. Drehregimes.
2. 2.
   • Stahlgüte: hoch-/höher-/höchstfester Stahl, z.B. hochkohliger Stahl
   • Coilgewicht: 30 t - 45 t
   • Beginn des Drehregimes: 200 sec nach dem Abziehen vom Hapsel 10 (11)
   • Anzahl der Zyklen: 15
   • Zykluspause/innerzyklische Pause zwischen der Hin- 3 und der (Zu-)Rückdrehung 4 (bzw. der Weiterdrehung 17): 1,5 min Pause zwischen zwei Zyklen/Zyklenpause bzw. Zwischenzyklenpause: 1,5 min
   • Drehwinkel 8 der Hindrehung 3: 75°
   • Drehwinkel 9, 18 der (Zu-)Rückdrehung 4 bzw. der Weiterdrehung 17: 75°
   • Erste/anfängliche Drehrichtung 5: vorzugsweise entgegen Aufwickelrichtung 7
   • Beachte: Erfindungsgemäß keine Drehung 3, 4, 17 über den Bund-/Bandanfang 12 am Außenumfang 13. Nach- und Zwischenbearbeitungen 14, 15 erfolgen nach Abschluss des Zyklus- bzw. Drehregimes.
3. 3.
   • Stahlgüte: hoch-/höher-/höchstfester Stahl, z.B. Mehrphasenstahl
   • Coilgewicht: 25 t - 40 t
   • Beginn des Drehregimes: 10 sec nach dem Abziehen vom Hapsel 10 (11)
   • Anzahl der Zyklen: 8 oder bis Abschluss der Phasenumwandlung Zykluspause/innerzyklische Pause zwischen der Hin- 3 und der (Zu-)Rückdrehung 4 (bzw. der Weiterdrehung 17): 2 min
   • Pause zwischen zwei Zyklen/Zyklenpause bzw. Zwischenzyklenpause: 2 min
   • Drehwinkel 8 der Hindrehung 3: 90°
   • Drehwinkel 9, 18 der (Zu-)Rückdrehung 4 bzw. der Weiterdrehung 17: 90°
   • Erste/anfängliche Drehrichtung: vorzugsweise entgegen Aufwickelrichtung 7
   • Beachte: Erfindungsgemäß keine Drehung 3, 4, 17 über den Bund-/Bandanfang 12 am Außenumfang 13. Nach- und Zwischenbearbeitungen 14, 15 erfolgen nach Abschluss des Zyklus- bzw. Drehregimes.

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

1. 1.
   • Steel quality: high-strength/high-strength steel, eg AHSS steel Coil weight: 20 t - 30 t
   • Beginning of the rotation regime: 1 min after pulling off the hapsel 10 (11)
   • Number of cycles: 10
   • Cycle pause/inter-cycle pause between forward 3 and (closed) reverse rotation 4 (or further rotation 17): 1 min
   • Pause between two cycles/cycle pause or intercycle pause: 1 min
   • Angle of rotation 8 of rotation 3: 90°
   • Angle of rotation 9, 18 of (closed) reverse rotation 4 or further rotation 17: 90°
   • First/initial direction of rotation 5: preferably counter to the winding direction 7
   • Note: According to the invention, there is no rotation 3, 4, 17 over the beginning of the collar/band 12 on the outer circumference 13. Subsequent and intermediate processing 14, 15 takes place after the end of the cycle or rotation regime.
2. 2.
   • Steel quality: high-strength/high-strength/highest-strength steel, eg high-carbon steel
   • Coil weight: 30 t - 45 t
   • Beginning of the turning regime: 200 sec after pulling off the hapsel 10 (11)
   • Number of cycles: 15
   • Cycle pause/inter-cycle pause between forward 3 and (closed) reverse rotation 4 (or further rotation 17): 1.5 min pause between two cycles/cycle pause or inter-cycle pause: 1.5 min
   • Angle of rotation 8 of rotation 3: 75°
   • Angle of rotation 9, 18 of (closed) reverse rotation 4 and further rotation 17: 75°
   • First/initial direction of rotation 5: preferably counter to the winding direction 7
   • Note: According to the invention, there is no rotation 3, 4, 17 over the beginning of the collar/band 12 on the outer circumference 13. Subsequent and intermediate processing 14, 15 takes place after the end of the cycle or rotation regime.
3. 3.
   • Steel quality: high-strength/high-strength steel, eg multi-phase steel
   • Coil weight: 25 t - 40 t
   • Beginning of the rotation regime: 10 sec after pulling off the hazel 10 (11)
   • Number of cycles: 8 or until the phase transformation is complete. Cycle pause/intercyclical pause between forward 3 and (close) reverse rotation 4 (or further rotation 17): 2 min
   • Pause between two cycles/cycle pause or intercycle pause: 2 min
   • Angle of rotation 8 of rotation 3: 90°
   • Angle of rotation 9, 18 of (closed) reverse rotation 4 or further rotation 17: 90°
   • First/initial direction of rotation: preferably counter to the winding direction 7
   • Note: According to the invention, there is no rotation 3, 4, 17 over the beginning of the collar/band 12 on the outer circumference 13. Subsequent and intermediate processing 14, 15 takes place after the end of the cycle or rotation regime.

- MCS system 33 (FIG 2)

FIG 2 shows a transport car 20, a "Modular Coil Shuttle (MCS) Car" (MSC for short) 20, by means of which coils 1 (transported via the conveyor line 31 away from the coiler 10 towards the coil store 16 (and also rotated 3, 4, 17) can be.

For this purpose - according to the pallet circulation system 30 ( FIG 1 ) - a freshly wound hot coil 1 or the coil 1 deducted from the coiler 10 11 and on the MCS 20, such as FIG 2 clarifies filed. The MCS 20 is (possibly via the processing stations 14, 15) moved to the coil store 16, in which the coil 1 is then deposited, whereby the coil 1 is then transported from the coiler 10 to the coil store 16 or has been.

How FIG 2 shows, the MCS sees 20 - corresponding to the palette 20 ( FIG 1 ) - A support saddle 24 (as a collar support 21) before, on which the coil to be transported 1 is placed or how FIG 2 shows is filed.

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

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

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

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 for an intermittent forward 3 and (closed) reverse rotation 4 or further rotation 17 ("cycle") .

For this purpose, the controller 29 determines the corresponding rotation parameters (see above for the pallet circulation system 30), such as the start of the rotation 3, 4, 17 rotation angle 8, 9, 18 direction of rotation 5, 6, duration of a rotation 3, 4, 17 pause duration between two rotations, Rotational speed, number of rotations/cycles, start/end of the total cycle and many more. - depending on the material, size, circumference, diameter, weight and temperature as well as the thickness of the metal strip 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) in the pallet circulating system 30 and the MCS system 33 - with integrated driven there - rollers 22, 23, rollers 22, 23 can also be provided on the pallet 20 or the MCS 20, which can be coupled by external ones 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 create a mechanical connection with the rollers 22, 23 and rotate 3, 4, 17 the rollers 22, 23 and thus the coil 1 raise.

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

3 shows a section of a conveyor line 31 in a hot rolling mill for the production of a metal strip.

How 3 shows, are - here - coils 1 deducted from two coilers 10 on a trolley 20 and transported over a "round trip" 34 to post-processing or intermediate processing stations 14, 15 (here weighing station 14 and strapping station 15). (Before they are then transported to a federal warehouse 16 and stored there (not shown or only indicated)).

Along the circuit 34 are how 3 clarifies - in this case - two floor roller stations 51 arranged (indicated).

These floor roller stations 51 are - according to the pallet 20 ( FIG 1 ) and the MCS 20 ( FIG 2 ) - Equipped with driven rollers 22, 23 (with integrated drives 27), whereby coils 1 applied there - according to a specific rotation regime (see above) - rotated 3, 4, 17 can be.

Coils 1 that have been moved towards the floor roller stations 51 are temporarily removed from the transport carriage 20 and shifted to the respective floor roller station 51, where they are rotated according to a specific rotation regime (see above). After completion of the turning regime, the coils 1 are shifted back to the transport carriage 20 and transported further.

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

In order to avoid the above-described disadvantageous ovalization of a coil 1, the above-described MCS 20 can also be used as follows after a turning regime which is not part of the invention (cf. Figures 1 to 3 ).

The coil is here rotated back 4 around its longitudinal axis 2 in the first direction of rotation 5 without a break, i.e. without the "cycle pause"/"intercyclical pause", in the second opposite direction of rotation 6, with the back 3 and back 4 turning several times continuously, ie without the "cycle pause"/"intercycle pause", one after the other.

• Stahlgüte: hoch-/höher-/höchstfester Stahl, z.B. AHSS-Stahl Coilgewicht: 20 t - 30 t
• Beginn des Drehregimes: mit Beginn des Transportvorgangs, 1 min nach dem Abziehen vom Hapsel 10 (11)
• Ende des Drehregimes: mit Beendigung des Transportvorgangs beim Bundlager 16
• Anzahl der Zyklen: Vielfach
• Zykluspause/innerzyklische Pause zwischen der Hin- 3 und der (Zu-)Rückdrehung 4: keine
• Pause zwischen zwei Zyklen/Zyklenpause bzw. Zwischenzyklenpause: keine
• Drehwinkel 8 der Hindrehung 3: 90°
• Drehwinkel 9 der (Zu-)Rückdrehung 4: 90°
• Erste/anfängliche Drehrichtung 5: vorzugsweise entgegen Aufwickelrichtung 7
• Beachte: Vorzugsweise keine Drehung 3, 4 über den Bund- /Bandanfang 12 am Außenumfang 13. Nach- und Zwischenbearbeitungen 14, 15 erfolgen nach Abschluss des Drehregimes.

Relevant regime parameters can be set:

• Steel quality: high-strength/high-strength steel, eg AHSS steel Coil weight: 20 t - 30 t
• Beginning of the turning regime: with the beginning of the transport process, 1 min after pulling off the hapsel 10 (11)
• End of the shooting regime: with the end of the transport process at Bundlager 16
• Number of Cycles: Multiple
• Cycle pause/inter-cycle pause between forward 3 and (toward) reverse rotation 4: none
• Pause between two cycles/cycle pause or intercycle pause: none
• Angle of rotation 8 of rotation 3: 90°
• Angle of rotation 9 of the (towards) reverse rotation 4: 90°
• First/initial direction of rotation 5: preferably counter to the winding direction 7
• Note: Preferably no turning 3, 4 beyond the beginning of the collar/band 12 on the outer circumference 13. Post- and intermediate processing 14, 15 takes place after the turning 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 of a coil

In order to avoid the above-described disadvantageous ovalization of a coil 1, the above-described MCS 20 can also be used as follows after a turning regime which is not part of the invention (cf. Figures 1 to 3 ).

The coil is here during the entire transport process between the withdrawal 11 from the coiler 10 and the depositing in the coil store 16 without interruption about its longitudinal axis 2 in a and rotated 19 in the same direction of rotation 35 in the winding direction 7 of the coil 1.

• Stahlgüte: hoch-/höher-/höchstfester Stahl, z.B. AHSS-Stahl Coilgewicht: 20 t - 30 t
• Beginn des Drehregimes: mit Beginn des Transportvorgangs, 1 min nach dem Abziehen vom Hapsel 10 (11)
• Ende des Drehregimes: mit Beendigung des Transportvorgangs beim Bundlager 16
• Anzahl der Zyklen: keine, Drehung nur in Aufwickelrichtung Drehgeschwindigkeit: langsam (beispielsweise mit 10 min pro Umdrehung).

Relevant regime parameters can be set:

• Steel quality: high-strength/high-strength steel, eg AHSS steel Coil weight: 20 t - 30 t
• Beginning of the turning regime: with the beginning of the transport process, 1 min after pulling off the hapsel 10 (11)
• End of the shooting regime: with the end of the transport process at Bundlager 16
• Number of cycles: none, rotation only in winding direction Rotation speed: slow (e.g. 10 min per rotation).

reference list

1

Metal bundle, hot bundle, coil, bundle

2

longitudinal axis

3

turning

4

(To) reverse rotation

5

first direction of rotation of forward rotation or further rotation

6

second opposite direction of rotation of the (closed) reverse rotation

7

winding direction

8th

rotation angle of the rotation

9

Angle of rotation of the (toward) reverse rotation

10

reel

11

Pulling off a reel

12

beginning of fret

13

outer perimeter

14

Weighing (Weigh Station)

15

Binding, strapping (binding station)

16

flange bearing

17

further rotation

18

rotation angle of further rotation

19

(Permanent, uninterrupted) turning

20

Transport device, transport trolley, pallet, MCS Car

21

waist band

22

first (driven/drivable) (transport) roller

23

second (driven/drivable) (transport) roller

24

waistband/carrying saddle

25

first seat post

26

second seat post

27

integrated drive

28

external (connectable) drive unit

29

steering

30

pallet circulation system

31

Conveyor/transport route

32

adjustment system

33

MCS system

34

circuit

35

one and the same direction of rotation

50

transport system

51

Transport station, floor rolling/floor rotating station

52

discharge station

Claims (14)

1. Method for avoiding changes of shape in metal coils (1), wherein

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

   characterized in that

   - the forward rotation (3) in the first direction of rotation (5) is carried out counter to a coiling direction (7) of the metal coil (1), and

   - the forward rotation (3) and/or (reverse) rotation back (4) and/or the further rotation (17) of the metal coil (1) are/is carried out in such a way that, in the process, the metal coil (1) is not rotated beyond a coil start (12) on an outer circumference (13) of the metal coil (1), and

   - there is a pause between the forward rotation (3) and the subsequent (reverse) rotation back (4) of the metal coil (1) or between the forward rotation (3) and the subsequent further rotation (17) of the metal coil (1).
2. Method according to Claim 1,
   characterized in that
   the metal coil (1) is a newly wound hot coil (1).
3. Method according to Claim 1 or 2,
   characterized in that
   the metal coil (1) is rotated forwards (3) and back (4) multiple times, or the metal coil (1) is rotated forwards (3) and multiple times is rotated further (17).
4. 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 (reverse) rotation back (4) and/or an angle of rotation (18) of the further rotation (17) of the metal coil (1) are/is set depending on a material of the metal coil (1).
5. Method according to at least one of the preceding claims,
   characterized in that
   a pause between the forward rotation (3) and the subsequent (reverse) rotation back (4) of the metal coil (1) and/or a pause between the forward rotation (3) and the subsequent further rotation (17) of the metal coil (1) are/is set depending on a material of the metal coil (1).
6. Method according to at least one of the preceding claims,
   characterized in that
   a start of the forward rotation (3) of the metal coil (1) after being drawn off from a coiler (11) is set depending on a material of the metal coil (1).
7. 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 (reverse) rotation back (4) in the second, opposite direction of rotation (6) and/or the further rotation (17) in the first direction of rotation (5) take/takes place through an angle of rotation (8, 9, 18) in the range of approximately 45° to 135°.
8. 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 (reverse) rotation back (4) in the second, opposite direction of rotation (6) and/or the further rotation (17) in the first direction of rotation (5) take/takes place through the same angle of rotation (8, 9, 18) in each case.
9. Method according to at least one of the preceding claims,
   characterized in that
   there is a pause between the forward rotation (3) and the subsequent (reverse) rotation back (4) of the metal coil (1) or between the forward rotation (3) and the subsequent further rotation (17) of the metal coil (1) that has a duration in the range of approximately 100 s to 300 s.
10. Method according to at least one of the preceding claims,
    characterized in that
    the method starts with an initial forward rotation (3) of the metal coil (1) for approximately 100 s to 300 s after being drawn off from a coiler (11).
11. Method according to at least one of the preceding claims,
    characterized in that
    the metal coil (1) consists of a highly carbonaceous steel, a press-hardening steel, a multi-phase steel or an advanced high-strength steel grade (AHSS) steel.
12. Method according to at least one of the preceding claims,
    characterized in that
    the metal coil (1) is drawn off (11) from a coiler (10) and/or bound (15) and/or weighed (14) before the forward rotation (3), and/or the metal coil (1) is deposited in a coil store (16) after the (reverse) rotation back (4) or after the further rotation (17).
13. Method according to at least one of the preceding claims,
    characterized in that
    the metal coil (1) is sampled and/or strapped (15) and/or weighed (14) and/or marked and/or measured.
14. Method according to at least one of the preceding claims, carried out
    during a phase transition of the metal coil (1) from austenite to ferrite.

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