阅读说明：本技术 用于避免在金属卷材中的形状变化、尤其用于避免新卷绕的热卷材的坍塌的方法 (Method for avoiding shape changes in a metal coil, in particular for avoiding the collapse of a newly wound hot coil ) 是由 R·霍费尔 L·皮赫莱尔 C·萨尔兹曼 A·塞林格 O·西尔伯曼 于 2020-01-21 设计创作，主要内容包括：本发明涉及一种用于避免在金属卷材(1)中的形状变化、尤其用于避免新卷绕的热卷材(1)的坍塌的方法。在所述方法中规定了：所述金属卷材(1)、尤其新卷绕的热卷材(1)围绕其纵向轴线(2)间歇地沿第一转动方向(5)正转(3)并且随后沿相反设置的第二转动方向(6)反转(4)或者沿第一转动方向(5)继续转动(17)。(The invention relates to a method for avoiding shape changes in a metal coil (1), in particular for avoiding the collapse of a newly wound hot coil (1). In the method, provision is made for: the metal coil (1), in particular a newly wound hot coil (1), is intermittently rotated in a first direction of rotation (5) in a positive direction (3) about its longitudinal axis (2) and subsequently rotated in a second, oppositely disposed direction of rotation (6) in a negative direction (4) or rotated further (17) in the first direction of rotation (5).)

1. Method for avoiding shape changes in a metal coil (1), wherein

-the metal coil (1) is intermittently positively rotated (3) in a first direction of rotation (5) about its longitudinal axis (2) and subsequently reversely rotated (4) in an oppositely disposed second direction of rotation (6) or continued to rotate (17) in the first direction of rotation (5), and

-a positive rotation (3) in a first direction of rotation (5) is carried out against a winding direction (7) of the metal coil (1), and

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

-a stationary pause is made between a forward rotation (3) and a subsequent reverse rotation (4) of the metal coil (1) or between a forward rotation (3) and a subsequent continued rotation (17) of the metal coil (1).

2. The method of claim 1, wherein the first and second light sources are selected from the group consisting of,

it is characterized in that the preparation method is characterized in that,

the metal coil (1) is a newly wound hot coil (1).

3. The method according to claim 1 or 2,

it is characterized in that the preparation method is characterized in that,

the metal coil (1) is rotated in forward direction (3) and in reverse direction (4) a plurality of times, or the metal coil (1) is rotated in forward direction (3) and in further rotation (17) a plurality of times.

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

it is characterized in that the preparation method is characterized in that,

the angle of rotation (8) of the forward rotation (3) and/or the angle of rotation (9) of the reverse rotation (4) and/or the angle of rotation (18) of the further rotation (17) of the metal coil (1) is set depending on the material of the metal coil (1).

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

it is characterized in that the preparation method is characterized in that,

the dwell time between the forward rotation (3) and the subsequent reverse rotation (4) of the metal coil (1) and/or the dwell time between the forward rotation (3) and the subsequent further rotation (17) of the metal coil (1) is set depending on the material of the metal coil (1).

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

it is characterized in that the preparation method is characterized in that,

the start of the forward rotation (3) of the metal coil (1) after being pulled out (11) from the coiler is set according to the material of the metal coil (1).

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

it is characterized in that the preparation method is characterized in that,

the forward rotation (3) in the first direction of rotation (5) and/or the reverse rotation (4) in the oppositely disposed second direction of rotation (6) and/or the further rotation (17) in the first direction of rotation (5) is carried out with a rotation angle (8, 9, 18) from a range of approximately 45 DEG to 135 deg.

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

it is characterized in that the preparation method is characterized in that,

the forward rotation (3) in the first direction of rotation (5) and the reverse rotation (4) in the oppositely disposed second direction of rotation (6) and/or the further rotation (17) in the first direction of rotation (5) are each carried out with the same angle of rotation (8, 9, 18) as the range.

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

it is characterized in that the preparation method is characterized in that,

the stationary pause between the forward rotation (3) and the subsequent reverse rotation (4) of the metal coil (1) or between the forward rotation (3) and the subsequent continued rotation (17) of the metal coil (1) is carried out with a duration from the range of about 100 to 300 seconds.

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

it is characterized in that the preparation method is characterized in that,

-starting an initial forward rotation (3) of the metal coil (1) approximately 100 to 300 seconds after the drawing (11) from the coiler.

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

it is characterized in that the preparation method is characterized in that,

the metal coil (1) consists of high carbon steel, press hardened steel, multi-phase steel or Advanced High Strength Steel (AHSS) grade steel.

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

it is characterized in that the preparation method is characterized in that,

the metal coil (1) is pulled out (11) of a coiler (10) and/or strapped (15) and/or weighed (14) before the forward rotation (3) and/or the metal coil (1) is stored in a coil store (16) after the reverse rotation (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 hooped (15) and/or weighed (14) and/or marked and/or measured.

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

the method is performed at the phase transition of the metal coil (1) from austenite to ferrite.

15. A transport system (50) with a transport device (20); with a web support (21) having at least one first and a second rotatable transport roller (22, 23); and a drive unit (28) with at least one exterior, which can be mechanically coupled to one of the rotatable transport rollers (22, 23) for driving the transport roller (22, 23), the transport system being used for carrying out the method of one of the preceding method claims.

Technical Field

The invention relates to a method for preventing a change in shape in a metal coil, in particular for preventing the collapse of a newly wound hot coil, which can occur, for example, when producing a steel product, such as a metal strip, in a hot rolling mill or hot rolling train.

Background

In steel production, and therefore also in the production of metal strips, there is a trend for the production of consistently high, higher and highest strength steel qualities.

This trend also requires increased requirements in the production of steel products of such steel quality, in particular when hot rolling the steel product in a hot rolling mill/hot rolling train.

That is to say, owing to the always high, higher and highest-strength steel quality, a phase change of the steel product, for example from austenite to ferrite ("delayed phase change"), in particular also in respect of such subsequently cold-rolled quality, occurs not only in the cooling section of the hot rolling mill but also in the subsequent cooling section of the coiler in which the steel strip/metal strip is coiled after the rolling step/rolling process into a hot coil or coil stock, when the hot coil, which is coiled and drawn off from the coiler (and which may optionally also have been bundled), is transported to a coil magazine or in a coil magazine of the hot rolling mill in which the newly coiled hot coil is stored.

Phase changes in articles, such as metal coils or newly wound hot coils, in turn lead to volume changes and shape changes/deviations ("slumping") therein, which are undesirable and/or which lead to serious problems, in particular, during coil transport and in reworking installations, for example, when they are pulled up there on an uncoiler mandrel. A particular shape of this collapse in the steel product is the so-called "ovalization", in which, in the case of a metal coil/hot coil or coil, a shape change/shape deviation from the original (approximately) circular shape to the oval shape takes place.

In the case of metal strips having such specific steel qualities, for example high-carbon steel, press-hardened steel or multi-phase steel, or in the production of such metal strips, in particular during coiling or during coil transport, where the metal strip is present as a (coiled) coil or coil, a delayed phase change occurs and thus a volume change or a shape change, i.e. an (undesired) collapse or ovalization, in the product or coil/coil occurs.

A device for transporting a very heavy metal strip coil produced by coiling a rolled metal strip after a rolling process is known from EP 1683588B 1. The apparatus comprises trays for application in a circulation system and roller tables for further transport thereof. The pallet consists of longitudinal supports spaced apart from one another and coil supports bridging the longitudinal supports and having opposite support points including support corners.

In order to achieve a transport system which operates reliably despite the effects of load and heat buildup, the pallet is configured for transporting the coil with a contour of at least its longitudinal supports which compensates for vertical and horizontal deformations which have been calculated beforehand under the effect of load and heat.

Another device for transporting metal coils, so-called "coil wagons", is known from KR 101695986B 1. In order to bring the metal coil on the transport device into the desired position, rotatable supporting rollers are provided on the transport device, by means of which the stored metal coil can be rotated into the desired position.

EP 2629899B 1 also describes an apparatus for transporting a metal coil. On the device, a "fixed" coil/support is provided, which is provided with a thermal protection device and on which the metal coil is stored during transport.

From US 4271959 a, a device based on the beam lifting principle (hubbalkenpanzip) is known for removing a newly wound hot coil from the discharge coiler of a hot rolling mill. During transport, the web is also rotated about its longitudinal axis by a certain angular value in each lifting movement by means of a plurality of movable, yet positionally fixed, mechanical actuators. Although this successfully counteracts the deformation of the web, a correspondingly large number of individual lifts is required for larger transport distances, which can lead to damage to the circumferential surface of the web. It is also possible that the coil rests on its belt end for external abutment during the transport process, which, due to its own weight, can lead to mechanical impressions in the underlying winding layer.

KR 101036318B 1 discloses a transferring device for a web, by means of which the change in shape (ovalization) of the web can be reversed. The first conveyor belt with the support device for the individual coils transports the coils one after the other to a rotary lifting station (Umhebestation), where the individual coils are lifted by a vertically height-adjustable and laterally movable lift car and transferred onto a second conveyor belt of the same type. In case of need (ovalization), the relevant coil can be temporarily placed by the lift truck on the top (grope) of the rotationally driven roller during the transfer process, where it is rotated by 90 ° by the roller, so that the ovalization is compensated for. Although the disclosed invention makes it possible to compensate for already existing web deformations, it is not possible to prevent disadvantageous deformations from the beginning or to counteract such deformations during the entire transport process, because of the rotation process which is carried out only at one location.

KR 2012012518A discloses a carriage capable of travelling in one direction for accommodating a hot coil with four supporting rollers. For the purpose of rotating the coil at the transport carriage, at least two axially opposite support rollers are each connected to a drive fastened to the transport carriage, wherein the drives must be synchronized. In order to stop the turning process suddenly (for example due to an emergency), a braking device fastened to the transport carriage is also provided. To correct the coil deformation (ovalization), KR 101036318B 1 proposes to turn the coil at the transport carriage by 90 °. Although with the disclosed transport carriage it is possible to counteract an ovalization of the coil lying thereon, the rotary drive and the brake cause an increased dead weight and an increased expenditure of construction and energy for coil transport.

KR 101420629B 1 proposes an unwinding device in combination with a stationary coil storage device with a rotatably driven supporting roller onto which an elliptically shaped coil is first deposited. The unwinding device is introduced into the coil eyelet in a horizontal orientation, after which the two parts are turned through 90 °. The oval coil sags vertically due to its own weight until the unwinding equipment prevents further mutual sag. Subsequent cooling stabilizes such a shape-corrected coil so that the unwinding equipment collapses and can again be removed from the coil eyelet. Again, although a repair of the originally circular coil shape is possible, it cannot be prevented from the beginning and can also only be performed selectively, that is to say not during coil transport.

JP 2010207836 a proposes a transport carriage with a rotationally driven supporting roller in order to prevent the web from changing shape with increasing temperature, wherein the web is continuously rotated at least 1 revolution per minute during the transport process on the transport carriage and the rotational movement is initiated at least 30 seconds before the web is transported to the coiler of the subsequent processing station. Although this makes it possible to avoid deformation of the coil, the uninterrupted continuous rotational movement of the coil, in particular in the case of longer transport processes, leads to unnecessarily high wear of the outer surface of the coil.

Disclosure of Invention

The invention aims to provide the following steps: a method is provided with which problems in the production of metal coils, in particular in newly wound (hot) coils, or in particular slumping or ovalization in newly wound (hot) coils, can be avoided. In particular, the disadvantages of the known solutions should be avoided and the movement of the web applied as economically as possible in order to prevent unnecessary damage to the web surface as much as possible.

This object is achieved by a method for avoiding a change in shape in a metal coil, in particular for avoiding a collapse of a newly wound hot coil, having 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 the method for avoiding shape changes in the metal coil, provision is made for: a metal coil, in particular a newly wound hot coil, consisting in particular of high-carbon steel, press-hardened steel, multi-phase steel or advanced high-strength steel (AHSS) grade steel, is intermittently rotated about its longitudinal axis in a first direction of rotation in a positive direction and subsequently in a second, oppositely disposed direction of rotation or is rotated further in the first direction of rotation.

"metal coil" (also often abbreviated simply as "coil stock") means a metal product produced by winding a metal strip.

Here, "newly wound" may denote a metal coil produced by winding a metal strip being rolled subsequent to a rolling process.

"hot coil" can mean a metal coil consisting of a hot-rolled metal strip.

"intermittently" -in the usual sense as "with interruptions/intermittently" -here means: between the forward rotation and the reverse rotation or between the forward rotation and the further rotation, intentionally or intentionally/specifically inserted/set, are interrupted (rotation) in time/(rotation) intermittently (briefly, interrupted/intermittent).

The forward rotation, the interruption/pause and the reverse rotation or the continued rotation are also frequently referred to in the following in a simplified manner merely as (one) "cycle".

The "intentional" or "intentionally introduced" pause (between forward rotation and reverse rotation or between rotation and further rotation) is therefore a "targeted" pause (also abbreviated to "cyclic pause"/"pause within a cycle" in the following), which exceeds a possible pure reversal of the direction of rotation (in forward rotation and reverse rotation) by a "pure" switching between the directions of rotation, or which exceeds a pure (brief), in particular undesirable pause between forward rotation and further rotation.

In this context, the term "user" also means, either intentionally or specifically: in particular, the pause duration/pause duration (as opposed to a simple "switching of the direction of rotation" or an undesired standstill) is selected and/or set in a targeted manner as a function of one or more determined parameters. In other words, the forward rotation and the reverse rotation or the forward rotation and the further rotation are interrupted in a targeted manner for a predeterminable pause.

During this pause or pause duration, the metal coil or the newly wound hot coil is held stationary in a suitable manner, at least without an operation of rotating the metal coil/hot coil.

Harmless is that: the circulation of the metal/hot coil is overlapped with other actions/manipulations of the metal/hot coil, such as a translational travel of the metal/hot coil during the circulation.

In particular, the pause duration (or the rest duration/length of the rest phase) between the forward rotation and the reverse rotation or between the forward rotation and the further rotation can be selected (that is to say therefore intentionally-material-dependent-selected/set) as a function of the material of the metal coil, in particular of the freshly wound hot coil.

The parameter determining the pause duration or rest duration/phase can also be the size, circumference, diameter, weight and/or temperature of the metal coil, in particular of a newly wound hot coil, and/or can also be the thickness of the metal strip wound to form the metal coil/hot coil.

A plurality of parameters or a combination of parameters can also be taken into account for determining the pause duration or rest duration/phase between the forward rotation and the reverse rotation or between the forward rotation and the further rotation, or can be taken into account or used in the determination of the pause duration or rest duration/phase.

The pause duration or the rest duration/phase between the forward rotation and the reverse rotation or between the forward rotation and the further rotation of the metal coil, in particular of the newly wound hot coil, can furthermore be in or (set) in a range (minimum/maximum pause duration) of approximately 50 seconds to 300 seconds, in particular 100 seconds to 300 seconds, further in particular approximately 150 seconds to 250 seconds.

It is also possible to set a suitable pause duration of about 200 seconds, in the case of metal products.

The method is based on the following recognition that results: the circulation, that is to say the intermittent forward and reverse rotation or forward and continued rotation of the metal coil/hot coil, ensures that the phase change in the metal coil or the newly wound hot coil is maintained without a significant influence on the coil shape. This situation is based on: the phase change mentioned at the outset and thus the accompanying volume change thereof do not lead to a continuous shape change/shape deviation of the relevant web, but rather they occur in a separate step, i.e. for example when below a critical value of the static friction between the windings of the web abutting against one another. In other words, the rolls slide together piece by piece, for example under their own weight. Therefore, there is no mandatory need to continuously change the spatial orientation of the web in order to maintain the original winding shape.

That is to say, by means of the circulation, the metal coil/hot coil runs into changed, in particular "diametrically opposed", layers/positions in which the shape changes occurring in the metal coil/hot coil (due to the effect of gravity) are "compensated".

Thus, the collapse or ovalization of the metal coil, in particular of the newly wound hot coil, can be counteracted by compensating the shape change in the metal coil/hot coil during the intermittent forward and reverse rotations or the intermittent forward and further rotations.

The problems involved, as may occur, for example, when the coil to be pulled up collapses/ovalizes, on the uncoiler mandrel, can therefore be avoided.

In a suitable manner, it can also be provided that: the metal coil, in particular the newly wound hot coil, is rotated in a plurality of forward and reverse directions or in a plurality of further rotations, for example two, three, four or even more times, which is advantageous in particular for the shaping or maintaining of the round shape of the metal coil/hot coil. In short, a number of cycles are performed in the case of metal coils/hot coils.

In particular, the multiple cycles in the case of metal coils/hot coils give rise to a clear "directly opposite" effect and thus ensure in particular that the phase change is maintained without significantly affecting the coil shape.

It is also suitable that: such-conscious-pauses/interruptions such as "cyclic pauses" (within cycles) or "intra-cycle pauses" are also provided between two cycles (abbreviated here as "pause between cycles" or "inter-cycle pause") or between two further rotations (abbreviated here as "pause between cycles" or "inter-cycle pause") (and then all intermittent processes).

The pauses or inter-cycle pauses of the cycles can be determined depending on corresponding parameters such as the pause or the pause within the cycle, such as the material, size, circumference, diameter, weight and/or temperature of the metal coil/hot coil and/or the metal strip thickness of the metal coil/hot coil.

It is also possible to make the number of forward and reverse rotations or cycles, as well as the number of further rotations, dependent on one or more parameters, and thus for example also on the material, size, circumference, diameter, weight and/or temperature of the metal coil/hot coil and/or the metal strip thickness of the metal coil/hot coil.

Preferably, the "overall first/initial" forward rotation (in the first direction of rotation) is carried out counter to the winding direction of the metal coil or of the newly wound hot coil.

In addition, it can also be defined in a suitable manner that: the angle of rotation for the forward rotation and/or the angle of rotation for the reverse rotation and/or the angle of rotation for the further rotation of the newly wound hot coil is set as a function of the material, size, circumference, diameter, weight and/or temperature of the metal coil, in particular of the newly wound hot coil, and/or the metal strip thickness of the metal coil/hot coil.

The forward rotation in the first rotational direction and/or the reverse rotation in the oppositely disposed second rotational direction and/or the further rotation in the first rotational direction can also take place with a rotational angle from the range of approximately 22.5 ° to 135 °, in particular approximately 45 ° to 135 °, further in particular approximately 75 ° to 105 °, further in particular also approximately 90 °.

Particularly suitable are: the forward rotation in the first direction of rotation and the reverse rotation in the second, oppositely disposed direction of rotation or the forward rotation in the first direction of rotation and the further rotation in the first direction of rotation are each carried out with the same angle of rotation as the amplitude.

Alternatively, different angles of rotation can also be implemented here.

Furthermore, it is also possible to specify: such an intentional intermittent or stationary phase ("preschedulence"), such as a "cyclic pause" or an "intra-cycle pause" (within a cycle) or a "inter-cycle pause" (between two cycles), is likewise provided before the "overall first/initial" normal rotation in the first direction of rotation begins.

In other words or intuitively, for example after the metal coil/hot coil is pulled out of the coiler, a wait is made for a certain standstill time duration until starting with an "overall first/initial" forward rotation in the first direction of rotation or an "overall first/initial" cycle for the metal coil/hot coil.

The "pre-pause" can be determined depending on the respective parameters, such as the pause within a cycle or the pause/inter-cycle pauses of the cycles, such as the material, size, circumference, diameter, weight and/or temperature of the metal coil/hot coil and/or the metal strip thickness of the metal coil/hot coil.

In this case, it can be particularly expedient: (global first/initial "cyclical)" global first/initial "forward rotation starts about 100 to 300 seconds, particularly about 150 to 250 seconds, further particularly about 200 seconds after the metal coil/hot coil is pulled from the uncoiler.

Nevertheless, it is expedient to start with the (cyclical or "globally-first/initial" cyclical) "globally-first/initial" forward rotation as early as possible.

Expediently, in order to avoid mechanical damage to the metal coil/hot coil, the forward and/or reverse rotation and/or further rotation of the metal coil, in particular of the newly wound hot coil, is also carried out in such a way that the metal coil, in particular of the newly wound hot coil, is not rotated here past the coil start at the outer circumference of the metal coil, in particular of the newly wound hot coil.

According to a preferred further development: the method or cycle or cycles are performed after the metal coil/hot coil is drawn from the coiler and/or after or before the metal coil/hot coil is bundled, marked, measured, weighed and/or inspected (typically reprocessed) and/or before the metal coil/hot coil is stored.

In other words, it can be provided that: the metal coil, in particular the newly wound hot coil, is drawn off from the coiler and/or intermediately processed before the first cycle or the "overall first/initial" forward rotation and/or intermediately processed and/or stored in the coil magazine after the "last" cycle or the "overall last/final" reverse rotation or the "overall last/final" further rotation.

In short, the method can be carried out between the drawing from the reel-up and the storage in the coil magazine or between the reel-up and the coil magazine.

Furthermore, it is also possible to specify: the metal coil, in particular a freshly wound hot coil, is sampled and/or banded and/or weighed and/or marked and/or measured.

In a suitable manner, the method is carried out in the case of a metal coil/hot coil at/during the phase transition of the metal coil/hot coil, in particular from austenite to ferrite.

Here too, it can be particularly expedient: the method is not carried out until the phase transformation of the metal coil/hot coil, in particular from austenite to ferrite, has ended in the case of metal coils/hot coils.

If necessary, it is also possible to carry out a defined rerun of the method ("for safety reasons") (during which the method is carried out beyond the end of the phase change in the metal coil/hot coil). The rerun duration can in turn be set as a function of the material, size, circumference, diameter, weight and/or temperature of the metal coil, in particular of the newly wound hot coil, and/or the metal strip thickness of the metal coil/hot coil.

According to one refinement, a transport device for metal coils/hot coils, for example a pallet or a transport carriage (for example a Modular Coil Shuttle (MCS) vehicle) or optionally a lifting beam system (or a combination with a lifting beam system), is provided, which has a coil support with at least one first rotatable transport roller and a second rotatable transport roller, in particular in which at least one or two (or in the case of a still larger number of rotatable transport rollers all) rotatable transport rollers can be driven.

If the transport rollers can be driven (or driven), the transport device can be used in particular to carry out the method or its modifications.

The driven transport rollers can be realized by integrated (integrated into the transport rollers) drives/drive units, such as electric drives/electric motors (or hydraulically) or external (preferably mechanically) switchable/couplable drives/drive units.

The roller or the transport roller can have recesses in the area of the strapping, by means of which recesses the strapping leaves no impressions at the metal coil/hot coil.

By means of which forward and/or reverse rotation and/or further rotation can then be induced in the method.

In a suitable manner, a control unit is also provided, which controls the drivable roller or the drive of the roller depending on the method to be carried out. In this case, the control unit can determine, for given strip/coil parameters, such as, in particular, the material, size, circumference, diameter, weight and/or temperature of the metal coil/hot coil and/or the metal strip thickness of the metal coil/hot coil, the respective driving parameters, such as, in particular, the angle of rotation, the speed of rotation, the pause duration and/or the direction of rotation, and control/execute the method as a function thereof.

Furthermore, a transport system for the metal coil/hot coil can also be provided, which has a transport device, for example a pallet or a transport carriage (for example a Modular Coil Shuttle (MCS) vehicle) with a coil support, in particular with at least one first and a second rotatable transport roller; and with a transport station, for example a roller carriage, with a web support having at least one first and a second rotatable transport roller, wherein at least one or two (or in the case of a transport station also more rotatable transport rollers) rotatable transport rollers can be driven.

The transport system can then be used to carry out the method or its modifications.

In this case, it can then be provided, in particular: the method is performed at a transport station. The metal/hot coil can then be transferred (temporarily), for example in the form of a tapping station, from the transport device into/onto the transport station, where the method is carried out and then transferred again (back) into/onto the transport device.

The transport device can be used in particular for transporting the metal coil/hot coil after being pulled out of the coiler to a coil magazine, or in particular from the coiler to a tapping station and from there onward to a coil magazine.

In this case, a control unit can also be provided which controls the drivable roller or the drive of the roller as a function of the method to be carried out.

In a further method for avoiding a change in shape in a metal coil, in particular for avoiding a collapse of a newly wound hot coil, provision is made for: the metal coil, in particular a newly wound hot coil, is rotated about its longitudinal axis in a first direction of rotation in a forward direction and is not rotated intermittently in a second, oppositely disposed direction of rotation, wherein the forward rotation and the reverse rotation take place a plurality of times without intermittent succession to one another.

In other words or briefly and intuitively, according to this further method, the metal coil/hot coil is permanently rotated forward and backward without pauses, that is to say without pauses within a cycle pause/cycle and without pauses between cycles (between rotations).

In particular, the specification and the development, in particular with regard to the rotation, such as the angle of rotation, and/or the control thereof, apply accordingly to the further method.

In yet another method for avoiding a change in shape in a metal coil, in particular for avoiding a collapse of a newly wound hot coil, provision is made for: the metal coil, in particular the newly wound hot coil, is rotated in the same direction of rotation, in particular in the winding direction of the metal coil, without interruption about its longitudinal axis during the transport process, in particular between being drawn off from the coiler and being stored in the coil magazine.

In other words or briefly and intuitively, according to this yet further method, the metal coil/hot coil can be rotated permanently, in particular slowly, for example, at approximately >5 minutes per revolution, in particular approximately 10 minutes per revolution, in the same direction, preferably in the winding direction, between the coiler and the coil magazine or between being pulled out of the coiler and being stored in the medium coil magazine during the entire transport process.

In particular, the specification and the development, in particular with regard to the rotation, such as the angle of rotation, and/or the control thereof, apply accordingly to the yet further method.

The description given so far of advantageous embodiments of the invention includes a large number of features which are described in part in the respective dependent claims in the multiple-part form. However, these features can also be viewed individually and combined together in a suitable manner to be meaningful further combinations. In particular, the features can each be combined individually and in any suitable combination with the method according to the invention.

Even if some concepts in the description or in the claims are used in the singular or in combination with the words, respectively, the scope of the present invention should not be limited to the singular or the corresponding words. Furthermore, the words "a" and "an" should not be construed as a numerical word but as an indefinite article.

Drawings

The above-described features, characteristics and advantages of the present invention and the methods and manners in which they may be realized will become more clearly and more clearly understood in conjunction with the following description of embodiments of the invention which are set forth more particularly in connection with one or more of the accompanying drawings/figures (like components/assemblies and functions have like reference numerals in the drawings/figures). The examples serve to illustrate the invention and do not limit the invention to the combination of features given therein, nor to the functional features. Furthermore, features of each embodiment which are suitable for this can also be explicitly observed in isolation, removed from one embodiment, introduced into another embodiment to supplement it and combined with any of the claims.

Wherein:

fig. 1 shows a tray system for performing a roll/web turn according to a first embodiment;

FIG. 2 illustrates an MCS system for performing a coil/web turn in accordance with a second embodiment;

fig. 3 shows an outfeed station with a roller stand for performing a roll/web rotation according to a third embodiment.

Detailed Description

Intermittent web rotation for avoiding collapse/ovalization of the web, permanent forward and reverse web rotation without pauses and permanent web rotation in the same direction during the transport process (fig. 1 to 3):

the embodiments described in the following show, in accordance with fig. 1 to 3, a possible embodiment or realization of how collapse or ovalization in a newly wound hot web 1 (abbreviated to "web" 1 or "web" 1) can be avoided.

In this case, the embodiments each relate to a section from the process run during the production of the metal strip in the hot rolling mill.

The metal strip to be produced, with the associated trend, consists of new high-strength, higher-strength or highest-strength steel grades of steel, such as high-carbon steel, press-hardened steel, multi-phase steel or advanced high-strength steel (AHSS) grade steel.

During the processing steps in the production of the metal strip, it is necessary to: the metal strip which is wound to form coil 1 or coil 1 after the hot rolling process on coiler 10, i.e. the freshly wound hot coil 1 or coil 1, which usually has a temperature of up to 850 ℃ and a weight of up to 50t (tons), must be transported away from the winding or coiler 10 and towards the various processing stations (14, 15).

Before the coils/webs are stored in the coil store 16, the coils/webs 1 are processed in the individual processing stations (14, 15), for example, by being bundled 15, marked, weighed 14, measured and/or checked.

For the transport process necessary for the coil 1, which is remote from the coiler 10 and faces the coil store 16, a transport device 20 or a transport system 50 is required, which will be explained in the following in various embodiments.

Due to the increasingly strong steel quality during the production of the metal strip, phase transformations then also occur in the metal strip during this transport process, which in turn lead to undesirable volume changes and shape changes/shape deviations ("collapse"/"oval") in the coil 1.

Intermittent roll rotation to avoid collapse/ovalization of the roll:

in order to prevent such an ovalization of the coil 1: the coil 1 to be transported is rotated intermittently (about its longitudinal axis 2) in a forward direction 3 and in a reverse direction 4 (or alternatively is rotated further 17) during the transport process, away from the coiler 10 towards the coil store 16, if necessary several times.

The transport device/transport system described below is provided for such a coil handling/turning 3, 4 (, 17) and can then help to avoid collapse or ovalization in the coil 1.

Tray (circulation) system 30 (fig. 1):

fig. 1 shows a pallet 20 of a pallet circulation system 30, which pallet circulation system 30 transports a coil 1 away from the coiler 10 towards the coil magazine 16 by means of the pallet 20 moving on a transport section 31 by means of a pallet circulation carriage.

Here, the coil to be transported is loaded along its longitudinal axis onto the respective pallet circulation car.

For this purpose, the newly wound hot coil 1 or coil 1 is pulled out 11 of the coiler 10 and stored on a pallet 20 as illustrated in fig. 1. The pallet 20 travels via a conveying section 31 (if necessary via the processing stations 14, 15) to the coil magazine 16, in which the coil stock 1 is then stored, whereby the coil stock 1 is transported or has already been transported from the reel-up 10 to the coil magazine 16.

As shown in fig. 1, the pallet 20 is provided with a coil support 21 in the form of a support 24 on which the coil 1 to be transported is stored or on which the coil 1 is stored as shown in fig. 1.

For this purpose, the carrier support 24, as shown in fig. 1, also has two support supports 25, 26 arranged at a distance from one another, which preferably each have a roller 22, 23 that can be driven by means of an integrated drive 27 (not visible).

By means of a corresponding adjusting system 32, the two rollers 22, 23 forming the coil support 21/coil support 24 can be driven horizontally and vertically in the pallet 20 or in the support supports 25, 26 (not visible), as a result of which the height and/or spacing of the rollers 22, 23 can be adjusted and the coil support 21 can then be adapted to the coil 1 to be transported.

The integrated drive 27 of the rollers 22, 23 carrying the web 1 is actuated by means of a control 29 in order to enable a controlled rotation of the web 1 stored thereon about its longitudinal axis 2.

The web turns 3, 4 (, 17) are carried out according to a predefinable circulation system, which provides, if necessary, a plurality of intermittent forward and reverse rotations 3, 4 (or alternatively a further rotation 17) ("circulation").

For this purpose, the control unit 29 determines, depending on the material, size, circumference, diameter, weight and temperature of the coil 1 and the thickness of the metal strip, the respective rotational parameters such as the start of rotation, the direction of rotation 5, 6, the duration of the rotation, the pause duration between two rotations, the rotational speed, the rotation angle 8, 9, the number of rotations/cycles, the start/end of the overall cycle, etc., and adjusts the integrated drives 27 of the rollers 22, 23 depending on these.

A possible cycle or rotor system can be implemented as follows:

1.

quality of steel: high/higher/highest strength steels, such as AHSS steels;

roll material weight: 20t-30 t;

start of the rotation system: 1 minute after pulling out (11) from the reel-up 10;

the number of cycles: 10;

intermittent/cyclic intermittent in the cycle between forward rotation 3 and reverse rotation 4 (or continued rotation 17): 1 minute;

intermittent between two cycles or intermittent between cycles: 1 minute;

rotation angle 8 of normal rotation 3: 90 degrees;

angle of rotation 9, 18 of the reverse rotation 4 or further rotation 17: 90 degrees;

first/initial rotation direction 5: preferably against the winding direction 7;

note that: preferably no rotation 3, 4, 17 passes the web start/start of tape 12 at the outer periphery 13. After the end of the recycling or rolling train, a further and intermediate processing 14, 15 takes place.

2.

Quality of steel: high/higher/highest strength steels, such as high carbon steels;

roll material weight: 30t-45 t;

start of the rotation system: 200 seconds after being pulled out (11) from the coiler 10;

the number of cycles: 15;

intermittent/cyclic intermittent in the cycle between forward rotation 3 and reverse rotation 4 (or continued rotation 17): 1.5 minutes;

Intermittent between two cycles or intermittent between cycles: 1.5 minutes;

rotation angle 8 of normal rotation 3: 75 degrees;

angle of rotation 9, 18 of the reverse rotation 4 or further rotation 17: 75 degrees;

first/initial rotation direction 5: preferably against the winding direction 7;

note that: preferably no rotation 3, 4, 17 passes the web start/start of tape 12 at the outer periphery 13. After the end of the recycling or rolling train, a further and intermediate processing 14, 15 takes place.

3.

Quality of steel: high/higher/highest strength steels, such as multi-phase steels;

roll material weight: 25t-40 t;

start of the rotation system: 10 seconds after being pulled out (11) from the coiler 10;

the number of cycles: 8 or until the phase change is finished;

intermittent/cyclic intermittent in the cycle between forward rotation 3 and reverse rotation 4 (or continued rotation 17): 2 minutes;

intermittent between two cycles or intermittent between cycles: 2 minutes;

rotation angle 8 of normal rotation 3: 90 degrees;

angle of rotation 9, 18 of the reverse rotation 4 or further rotation 17: 90 degrees;

first initial rotation direction: preferably against the winding direction 7;

note that: preferably no rotation 3, 4, 17 passes the web start/start of tape 12 at the outer periphery 13. After the end of the recycling or rolling train, a further and intermediate processing 14, 15 takes place.

MCS system 33 (fig. 2):

fig. 2 shows a transport carriage 20, a "Modular Coil Shuttle Car (MCS) vehicle" (MSC for short) 20, by means of which a Coil 1 can be transported (and also rotated 3, 4, 17) away from the coiler 10 towards the Coil magazine 16 via a transport section 31.

For this purpose, corresponding to the pallet circulation system 30 (fig. 1), the newly wound hot coil 1 or the coil 1 is pulled out 11 of the coiler 10 and stored on the MCS 20 as illustrated in fig. 2. The MCS 20 travels (optionally via processing stations 14, 15) to the coil magazine 16, in which the coil stock 1 is then stored, whereby the coil stock 1 is then transported or already transported from the reel-up 10 to the coil magazine 16.

As fig. 2 shows, MCS 20, which corresponds to pallet 20 (fig. 1), is provided with a support 24 (as a coil support 21) on which coil 1 to be transported is stored or on which, as fig. 2 shows, coil 1 is stored.

For this purpose, the carrier support 24, as shown in fig. 2, also has two support supports 25, 26 arranged at a distance from one another, each having a roller 22, 23 that can be driven by means of an integrated drive 27 (not visible).

By means of a corresponding adjusting system 32, in the MCS 20 or in the support supports 25, 26 (as outlined in fig. 2), the two rollers 22, 23 forming the coil support 21/coil support 24 can be driven horizontally and vertically, as a result of which the height and/or spacing of the rollers 22, 23 can be adjusted and the coil support 21 can then be adapted to the coil 1 to be transported.

The integrated drive 27 of the rollers 22, 23 carrying the web 1 is actuated by means of a control 29 in order to enable a controlled rotation 3, 4, 17 of the web 1 stored on the rollers about its longitudinal axis 2.

The web turns 3, 4, 17 are carried out according to a predefinable circulation system (see this circulation system in the tray circulation system 30) which provides, if appropriate several times, intermittent forward and reverse turns 3, 4 or further turns 17 ("circulation").

For this purpose, the control unit 29 determines the respective rotational parameters (see above in the case of the pallet circulation system 30) such as the start of the rotations 3, 4, 17, depending on the material, size, circumference, diameter, weight and temperature of the coil and the thickness of the metal strip; the rotation angles 8, 9, 18; the directions of rotation 5, 6; duration of rotation 3, 4, 17; the intermittent duration between two rotations, the rotation speed, the number of rotations/cycles, the start/end of the total cycle, etc. and adjust the integrated drive 27 of the rollers 22, 23 according to them.

A possible circulation system or rotation system is described above.

Alternatively (not shown), in the tray circulation system 30 and the MCS system 33 with the rollers 22, 23 integrated therein, which are driven, rollers 22, 23 can also be provided on the tray 20 or the MCS 20, which rollers are driven by an external, couplable drive 28.

For this purpose, one or more stations can be provided along the transport section 31 or in conjunction with the transport section 31, which make a mechanical connection to the rollers 22, 23 and apply the rotations 3, 4, 17 of the rollers 22, 23 and thus of the web 1.

Outfeed station 52 with idler frame 51 (fig. 3):

fig. 3 shows a cut-out of a conveying section 31 in a hot-rolling mill for producing a metal strip.

As shown in fig. 3, (before the coil stock is then transported to the coil store 16 and stored there (not shown or only outlined)), where the coil stock 1 is pulled out of the two coilers 10 onto a transport carriage 20 and transported via a "round route" 34 to the reprocessing or intermediate processing stations 14, 15 (here weighing station 14 and strapping station 15).

Along said circular path 34, two idler frames 51 (sketched) are arranged, as illustrated in fig. 3-in this case.

The roller frame 51, corresponding to the tray 20 (fig. 1) and the MCS 20 (fig. 2), is equipped with driven rollers 22, 23 (with integrated drive 27), so that the coil stock 1 stored there can be rotated 3, 4, 17 depending on the determined rotation regime (see above).

The coil 1 travelling towards the carrier roller frame 51 is there temporarily removed from the transport carriage 20 and transferred into the respective carrier roller frame 51, where it is rotated according to the determined rotation train (see above). After the end of the turning train, the coil 1 is again transferred back to the transport carriage 20 and transported further.

Permanent roll forward and reverse rotation to avoid collapse/ovalization of the roll:

in order to avoid the above-described disadvantageous ovalization of the coil 1, the above-described MCS 20 (see fig. 1 to 3) can also be used as follows depending on the rotor system.

Here, the web is rotated in a first direction of rotation 5 about its longitudinal axis 3 in a positive direction of rotation 3 and is rotated 4 in a second, oppositely disposed direction of rotation 6 without pauses, i.e. without "pause in cycles"/"pause between cycles", wherein the positive rotation 3 and the negative rotation 4 are carried out several times without pauses, i.e. without "pause between cycles"/"pause between cycles" one after the other.

Here, the system parameters can be set as follows:

quality of steel: high/higher/highest strength steels, such as AHSS steels;

roll material weight: 20t-30 t;

start of the rotation system: 1 minute after pulling out (11) from the reel-up 10 with the start of the transport process;

and (3) ending the rotating system: the end of the transport process at the coil magazine 16;

the number of cycles: multiple times;

intermittent/cyclic intermittent within the cycle between normal rotation 3 and reverse rotation 4: none;

intermittent between two cycles or intermittent between cycles: none;

rotation angle 8 of normal rotation 3: 90 degrees;

rotation angle 9 of reverse 4: 90 degrees;

first/initial rotation direction 5: preferably against the winding direction 7;

note that: preferably no rotation 3, 4 passes the web start/band start 12 at the outer periphery 13. After the end of the recycling system, a reprocessing and intermediate processing 14, 15 takes place.

Permanent, slow roll rotation in the same direction of rotation during the entire transport of the roll to avoid the collapse/ovalization of the roll:

in order to avoid the above-described disadvantageous ovalization of the coil 1, the above-described MCS 20 (see fig. 1 to 3) can also be used as follows depending on the rotor system.

The coil is rotated 19 in the winding direction 7 of the coil 1 in the same direction of rotation 35 without interruption about its longitudinal axis 2 during the entire transport process between the drawing out 11 from the coiler 10 and the storage in the coil magazine 16.

Here, the system parameters can be set as follows:

quality of steel: high/higher/highest strength steels, such as AHSS steels;

roll material weight: 20t-30 t;

start of the rotation system: 1 minute after pulling out (11) from the reel-up 10 with the start of the transport process;

and (3) ending the rotating system: the end of the transport process at the coil magazine 16;

the number of cycles: none, only rotation in the winding direction;

rotation speed: slowly (e.g., at 10 minutes per revolution).

List of reference numerals

1 Metal coil, Hot coil, coil stock

2 longitudinal axis

3 forward rotation

4 reverse rotation

5 first direction of rotation for normal or continued rotation

6 reversed oppositely disposed second direction of rotation

7 direction of winding

8 angle of rotation of positive rotation

9 angle of rotation of the reverse

10 coiling machine

11 are pulled out of the coiler

12 coil start

13 outer periphery of

14 weight (weighing station)

15 bundling, binding hoop (bundling station)

16 coiled material warehouse

17 continue to rotate

18 angle of continued rotation

19 (permanent, uninterrupted) rotation

20 transport equipment, transport vehicle, tray, MCS-type vehicle

21 coil supporting part

22 (driven/drivable) first (transport) rollers

23 (driven/drivable) second (transport) roller

24 coil support/carrier support

25 first support part

26 second seat support

27 Integrated driver

28 external (couplable) drive unit

29 control part

30 tray circulation system

31 conveying/transporting section

32 adjustment system

33 MCS system

34 circular path

35 in the same rotational direction

50 transport system

51 transport station, carrier roller frame/carrier revolving rack

And 52 an outfeed station.