Winding method and winding system

Abstract

The invention relates to a method (100) and a system (1) for winding a continuously produced metal strip (2). In this case, the metal strip (2) is guided along a first transport path (22) to a first coiling machine (20) (S1) by means of a guide roller (11) of a guide roller pair (10), which guide roller is positioned in a first roller position (P1), and is divided (S3a, S4b) upstream of the guide roller pair (10). Furthermore, the guide rollers (11) of the guide roller pair (10) are repositioned into a second roller position (P2) in which the metal strip (2) is guided by the guide rollers (11) along a second transport path (32) to at least one second coiling machine (30) (S5a, S5b). According to the invention, the repositioning of the guide roller (11) is carried out in time either before or after the metal strip (2) is cut, depending on the thickness of the metal strip (2) and / or the conveying speed of the metal strip (2).

Description

Technical Field

[0001] The present invention relates to a method and a system for winding a continuously manufactured metal strip. Background Art

[0002] As a particularly efficient process for manufacturing thin metal strips, the so-called "endless strip production" (ESP) has proven itself in casting-rolling composite equipment, in which continuously cast metal bars are rolled to the desired strip thickness immediately after the corresponding casting equipment. The strips thus manufactured are usually cut up for storage and transport, and the strip sections thus produced are wound into metal coils, i.e. so-called "coils", by means of coiling machines (usually called "down coils" in English). To enable continuous manufacture of the metal strip, a plurality of coiling machines are provided to which the strip sections can be selectively fed.

[0003] If a new strip section is to be fed to another coiling machine, the movable guide rollers of the guide roller pair immediately preceding the currently still operative coiling machine can be moved during continuous operation in such a way that the new strip section is fed past this coiling machine to another coiling machine.

[0004] However, when manufacturing thick metal strips with a strip thickness of, for example, greater than 86 - 13 mm, such a procedure can no longer be used. In conventional casting-rolling composite equipment, the movement of the guide rollers causes the thick metal strip to come into contact with the wall of the guide shaft leading to the currently still operative coiling machine. Thus, thick metal strips are usually manufactured in conventional hot rolling mills that do not operate continuously in such a way that the metal strip sections are guided to different coiling machines by means of a switchable switching device rather than by the movement of the guide rollers.

[0005] To maintain the strip tension in front of at least one winding coiling machine, it is known from DE 10162433 A1 that at least two drive rollers are adjustable in such a way that at least two different feed directions of the metal strip can be predefined by adjusting the drive rollers.

[0006] KR20150073016 A discloses a downward clamping roller which is arranged between a material distributor and a coiling machine. It is possible to dispense with the pressing roller and the side guides arranged downstream between the material distributor and the coiling machine.

[0007] DE 19620696 A1 relates to the assignment of individual batches of rolled material (Walzgutlos) to corresponding coiling machines, and it is proposed to arrange a drive device behind a floating shearing machine, the rollers of which can be moved in such a way that the plane defined by the two axes of the rollers can be deflected from a substantially vertical position so that the normal to this plane swings in the direction of the first coiling machine in the coiling machine arranged behind.

[0008] KR 100470642 B1 relates to the guiding of the front and rear ends of a strip produced in a steelworks when using a plurality of clamping coiling machines. Strip guide rollers and bending rollers are provided which can move along the circumferential direction of the turning rollers above the turning rollers.

[0009] It is known from US 3818737 A that before dividing the strip, the strip guiding element is rotated about an axis so that the pressing roller presses the strip against the deflection roller and the strip guiding part is oriented on the common tangent of the winding drum and the deflection roller. Summary of the Invention

[0010] Against this background, the object of the present invention is to describe an improved method and system for winding metal strips, in particular to enable the rotation between two coiling machines to be achieved in continuous operation even in the case of thick metal strips.

[0011] This object is solved by a method and a system for winding a continuously manufactured metal strip according to the independent claims.

[0012] Preferred embodiments of the invention are the subject of the dependent claims and the following description.

[0013] In a method for winding a continuously manufactured metal strip according to a first aspect of the invention, the metal strip is guided by the rollers of a pair of guide rollers positioned in a first roller position along a first conveying path to a first coiling machine and is divided upstream of the pair of guide rollers. Furthermore, the rollers of the pair of guide rollers are repositioned to a second roller position, in which the metal strip is guided by the rollers along a second conveying path to at least one second coiling machine. According to the invention, the repositioning of the guide rollers depends on the thickness of the metal strip and / or the conveying speed of the metal strip and is carried out either before or after dividing the metal strip in time.

[0014] In the sense of the present invention, "upstream" preferably means "before" as seen in the conveying direction. If, for example, a dividing device is provided upstream of the pair of guide rollers, then the metal strip section first passes through the dividing device before it reaches the pair of guide rollers.

[0015] One aspect of the invention is based on the following means, namely: at a moment, moving the repositionable guide roller of the guide roller pair, said moment depending on the thickness and / or conveying speed of the metal strip to be wound. Suitably, the moment is coordinated in time with the moment when the metal strip is divided. The moment can be selected such that even in the case of a thick metal strip with a strip thickness of 6 - 13 mm or more, there will be no unwanted damage to the metal strip and / or the equipment components, for example due to the contact of the metal strip with the components of the coiler conveyor or the coiler barrel.

[0016] At a moment, moving the guide roller, for example, from a first roller position to a second roller position, and this moment can be before or after the moment when the metal strip is divided in time. Here, it is preferred that the guide roller is repositioned after the metal strip is divided when processing a thick metal strip. Through the division of the metal strip, a gap may be generated between the two metal strip ends formed during the division. If the gap is large enough, the guide roller can be repositioned when the gap passes through the guide roller pair. In this case, the guide roller pair does not perform the guiding task during the repositioning of the guide roller, and unwanted contact between the (thick) metal strip that normally moves through the guide roller and the equipment components of the coiling device, especially the guiding barrel, can be prevented.

[0017] The size of the gap that can be generated when dividing the metal strip preferably corresponds to the conveying speed of the metal strip here. In principle, it applies that the smaller the conveying speed, the larger the gap that can be generated. Since the volume flow rate remains constant during the continuous casting process, the conveying speed usually depends on the thickness of the metal strip. Therefore, for a thick metal strip, the gap can become large enough to allow the guide roller to be repositioned in a "contactless" state.

[0018] In contrast, when processing a thin metal strip conveyed at a high speed, it is preferred that the guide roller has been repositioned before the metal strip is divided. For a thin metal strip with a thickness of, for example, less than 6 - 13 mm, there is no risk of establishing contact with the equipment components due to the movement of the guide roller.

[0019] The preferred embodiments of the invention and their improvement schemes are described below. As long as not explicitly excluded, these embodiments can be arbitrarily combined with each other and combined with the aspects of the invention described next.

[0020] If the guide rollers are repositioned only after the metal strip has been severed in terms of time, then, as already described previously, it is preferred that the guide rollers do not contact the metal strip during the repositioning. Therefore, in this case, it is preferred to reposition the guide rollers within a time interval relative to the time of severing the metal strip. For example, starting from the moment of severing the metal strip, it is possible to wait for a pre-given waiting time before repositioning the guide rollers. Here, the time interval or the pre-given waiting time suitably depends on the thickness of the metal strip and / or the conveying speed of the metal strip. The time interval or the waiting time can then exactly correspond to the following time interval: the time interval required for the gap between the two metal strip ends generated during severing to reach the guide roller pair.

[0021] The decision as to whether the guide rollers should be repositioned before or after severing the metal strip in terms of time should depend on whether the gap between the metal strip ends is sufficient for repositioning the guide rollers. Therefore, it is preferably necessary to check whether the method duration required for repositioning the guide rollers is greater than the following duration: the duration during which the guide roller pair does not guide the metal strip, i.e., "no contact", after severing the metal strip. Suitably, based on the result of this check, the guide rollers are repositioned either before or after severing the metal strip in terms of time.

[0022] If, for example, the metal strip is severed into a leading metal strip section wound by a first coiler and a subsequent metal strip section wound by a second coiler, then the check can be reliably carried out as follows:

[0023] The method duration required for repositioning the guide rollers is compared with the difference between a first duration and a second duration. The first duration is suitably defined on the one hand by the severing of the metal strip and on the other hand by the arrival of the head end (referred to in English as "headend") of the subsequent metal strip section at the guide roller pair. The second duration is suitably defined on the one hand by the severing of the metal strip and on the other hand by the emergence of the tail end (also referred to in English as "tailend") of the leading metal strip section from the guide roller pair. Therefore, the difference between the first and the second duration represents the duration during which no metal strip travels through the guide rollers.

[0024] If the check shows that the difference between the first and the second duration is less than the method duration, the guide roller is suitably repositioned before splitting the metal strip. In contrast, if the check shows that the difference between the first and the second duration is greater than the method duration, the guide roller can also be repositioned after splitting the metal strip without interrupting the operation of the device. Conducting the check to determine whether the guide roller should be repositioned before or after splitting the metal strip allows for flexible operation of the device in the case of very different strip thicknesses.

[0025] As an alternative to the check, it is also possible to make a decision on whether the guide roller should be repositioned before or after splitting the metal strip in terms of time at low cost based on looking up a table, namely the so-called "look up table". For example, it can be read from such a look-up table for which strip thicknesses and / or conveying speeds repositioning should be carried out before splitting, and for which strip thicknesses and / or conveying speeds repositioning should be carried out after splitting the metal strip.

[0026] For this purpose, for example, the strip thickness and / or the conveying speed can be calculated by means of an automation unit, such as in the so-called electronic and automatic (EA) pre-calculation for configuring the device components. As an alternative, these parameters can also be measured by means of a sensor unit, for example by one or more sensors of a so-called metallurgical measuring device (Messhütte).

[0027] Of course, the above-described check, especially the determination of the first and / or second duration, can also be based on the strip thickness and / or the conveying speed thus determined.

[0028] In order to provide sufficient time to reposition the guide roller especially when processing thick metal strips, the conveying speed on the first conveying path is preferably increased after splitting the metal strip. Thus, a gap generated during splitting the metal strip between the leading metal strip section and the subsequent metal strip section can be generated with a pre-given size, especially a minimum size. Therefore, this increase in the conveying speed is particularly advantageous when the guide roller is repositioned only after splitting the metal strip. Along with a suitable increase in the winding speed of the first coiler, the conveying speed on the first conveying path also increases. In particular, the conveying speed on the first conveying path can be achieved by increasing the winding speed of the first coiler. Thereby, the leading metal strip section can be accelerated relative to the subsequent metal strip section and the gap generated during splitting the metal strip can be enlarged, thus providing more time for repositioning the guide roller.

[0029] The winding method according to the invention can advantageously be used within a wide thickness range. For example, it is possible to wind a metal strip having a thickness between 0.5 mm and 30 mm without any problems. Thus, it is advantageous that, as part of the method, the metal strip is produced in a continuous process by a casting and rolling composite device, that is to say within the scope of an ESP, such that the metal strip has a thickness of at least 0.5 mm, preferably at least 0.8 mm and / or up to 25.4 mm and more, preferably up to 30 mm and more when it reaches the pair of guide rollers.

[0030] If the metal strip has a thickness of, for example, 6 mm or less, the guide rollers can already be repositioned in time before the splitting. Thus, for strip thicknesses up to, for example, 6 mm, conventional winding methods or conventional replacement of winding devices can be used. However, if the metal strip has a thickness of, for example, 13 mm or more, it is preferred to reposition the guide rollers only after splitting the metal strip. This can ensure that mechanical damage to the metal strip and / or equipment components, in particular to the coiler conveyor or the coiler barrel, is avoided. In particular, from a strip thickness of, for example, 6 mm, the rollers can be moved in time after splitting the strip. In contrast, from a strip thickness of, for example, 10 - 13 mm, it may be necessary to move the rollers in time after splitting the strip.

[0031] The preferred moment for repositioning the guide rollers may depend on the equipment design, in particular the coiler design or the equipment operation. The limit values for the strip thickness may in particular depend on the casting speed or the conveying speed, the travel of the actuator for repositioning the guide rollers and / or the speed of movement of the actuator, from which limit values onwards the movement of the guide rollers is possible and / or necessary in time after splitting the strip.

[0032] A system for winding a continuously produced metal strip according to a second aspect of the invention has: (i) a pair of guide rollers having repositionable guide rollers; (ii) a first coiler arranged downstream of the pair of guide rollers; (iii) at least one second coiler arranged downstream of the first coiler; (iv) at least one splitting device arranged upstream of the pair of guide rollers for splitting the metal strip; and (v) a control device which is set up to effect a repositioning of the guide rollers from a first roller position to a second roller position either before or after splitting the metal strip in time depending on the thickness of the metal strip and / or the conveying speed of the metal strip. Here, in the first roller position, the metal strip can be guided along a first conveying path to the first coiler. In the second roller position, the metal strip can be guided along a second conveying path to at least one second coiler.

[0033] Such a winding system can be generally used for continuously manufacturing metal strips with different strip thicknesses and / or (accompanying) conveying speeds. In particular, thereby, not only very thin metal strips with a strip thickness of approximately 1 mm or less, for example, can be wound in continuous operation, but also very thick metal strips with a strip thickness of approximately 20 mm or more, for example, can be wound. Thus, when the metal strip coil has reached its defined size on the first coiler, it is also possible to continue winding the thicker metal strip on the second coiler without interrupting the operation of the equipment.

[0034] Preferably, the system has an actuator for repositioning the guide roller, and by operating the actuator, the guide roller can be moved from the first roller position to the second roller position and / or from the second roller position to the first roller position. Therefore, the control device can be configured to: send a corresponding operating signal to the actuator. Preferably, the control device decides, for example, based on the strip thickness and / or the conveying speed with the aid of a corresponding control logic circuit whether to send the operating signal before or after splitting the metal strip in terms of time. In a variant, for example, when the control device is at least part of an automation unit, the control device itself can determine the strip thickness and / or the conveying speed. As an alternative, the control device can access sensor data that characterizes the strip thickness and / or the conveying speed and can be provided by a sensor unit.

[0035] The control device can be constructed in hardware technology and / or in software technology. In particular, the control device can have a processing unit that is preferably in data connection or signal connection with a storage system and / or a bus system. For example, the control device can have a microprocessor unit (CPU) or a module of such a microprocessing unit and / or one or more programs or program modules. The control device can be configured to: execute instructions implemented as a program stored in the storage system, detect input signals from a data bus, and / or send output signals to the data bus. The storage system can have one or more, in particular different, storage media, especially optical, magnetic, solid-state, and / or other non-volatile media. The program can have such characteristics that it embodies or can execute the method described herein so that the control device can execute the steps of such a method and thereby reposition the guide roller specifically before or after splitting the metal strip in terms of time. Description of the Drawings

[0036] The above-described features, characteristics, and advantages of the present invention and the ways and means of how to achieve these features, characteristics, and advantages become clearer and more understandable in connection with the following description of the embodiments, which will be explained in more detail in conjunction with the drawings. Here, the drawings at least partially schematically show the following:

[0037] Figure 1 Shows an example of a system for winding a continuously manufactured metal strip;

[0038] Figure 2 Shows a first roller position and a second roller position of a guide roller;

[0039] Figure 3 Shows an example of a metal strip that is segmented and has a gap formed by an increase in the winding speed of a leading metal strip section; and

[0040] Figure 4 Shows an example of a method for winding a metal strip.

[0041] It is generally expedient to use the same reference signs in the figures for identical or corresponding elements of the invention. Detailed Description

[0042] Figure 1 Shows an example of a system 1 for winding a continuously manufactured metal strip 2, the system having: a pair of guide rollers 10 having a repositionable guide roller 11 and a support roller 12, a first coiler 20, a second coiler 30, a dividing device 40 for dividing the metal strip 2, a control device 50, a sensor unit 60, and an actuator 70 for repositioning the guide roller 11. The control device 50 is suitably in data connection or signal connection with the dividing device 40, the sensor unit 60, and the actuator 70.

[0043] The system 1 can be part of a casting and rolling composite device which is set up for so-called "endless strip production" (ESP), that is to say for continuously manufacturing the metal strip 2. In addition to a casting device (not shown), such a casting and rolling composite device also suitably includes one or more rolling stands (not shown) in which the cast metal bar is rolled into the metal strip 2.

[0044] The system 1, and if necessary also the casting and rolling composite device, suitably has devices (not shown) for conveying the metal strip 2. These conveying devices can for example include driven conveying rollers. The coilers 20, 30 can also be at least part of these conveying devices, wherein the metal strip 2 is re-tensioned by winding on the respective coilers 20, 30.

[0045] The conveying device is suitably configured to convey the metal strip 2 along the conveying direction 3. In the example shown, this conveying direction 3 extends at least substantially in a horizontal line. With respect to the conveying direction 3, the first coiler 20 is arranged downstream of the pair of guide rollers 10, and the second coiler 30 is arranged downstream of the first coiler 20, such that the pair of guide rollers 10 can selectively guide the metal strip 2 either to the first coiler 20 or to the second coiler 30. If necessary, at least one additional coiler can also be provided downstream of the second coiler 30. The splitting device 40 is arranged upstream of the pair of guide rollers 10.

[0046] In the example shown, the first coiler 20 is arranged below the pair of guide rollers 10, such that the metal strip 2 travels downward through the guide roller 11 arranged below the metal strip 2 into the guiding well 21 leading to the first coiler 20. The path of the metal strip 2 between the guide roller 11 and the first coiler 20 defines the first conveying path 22, which is outlined as a dotted ellipse in Figure 1 it.

[0047] In principle, however, the first coiler 20 can also be arranged above the pair of guide rollers 10. In this case, the metal strip 2 travels upward along the first conveying path 22 to the first coiler 20 through the guide roller 11 arranged above the metal strip 2.

[0048] In the example shown, the guiding well 21 is formed by a first guiding element 23, such as a chute or a guiding table, and a second guiding element 24, which can also be configured to be movable, for example, as a transfer device, if necessary.

[0049] As already briefly described above, the pair of guide rollers 10 can also guide the metal strip 2 past the first coiler 20 to the second coiler 30. Here, the metal strip 2 is conveyed by the second guiding element 24, which suitably has a plurality of conveying rollers 25 on its upper side. In this case, the second guiding element 24 supports the metal strip 2 when conveying it towards the second coiler 30. The path of the metal strip 2 passing through the second guiding element 24 is drawn in dashed lines in Figure 1 it and defines the second conveying path 32.

[0050] Whether the guide roller pair 10 guides the metal strip 2 to the first coiler or to the second coiler 20, 30 is determined by the positioning of the guide roller 11, especially relative to the support roller 12, when the leading end of the metal strip 2, i.e., the strip start end of the metal strip 2, reaches the guide roller pair 10. If the guide roller 11 is placed in front of the support roller 12 with respect to the conveying direction 3, that is to say, the axis 11a of the guide roller 11 is arranged upstream with respect to the axis 12a of the support roller 12, then the arriving leading end of the metal strip 2 is turned onto the first conveying path 22. If the guide roller 11 and the support roller 12 are at the same height with respect to the conveying direction 3 or the guide roller 11 is placed behind the support roller 12, that is to say, if the axis 11a of the guide roller 11 is downstream with respect to the axis 12a of the support roller 12, then the arriving leading end portion of the metal strip 2 is turned onto the second conveying path 32.

[0051] The position of the guide roller 11, especially relative to the support roller 12, can be changed here by the manipulation of the actuator 70. In particular, the guide roller 11 can be moved by means of the actuator 70 from the first roller position to the second roller position, wherein in the first roller position the guide roller 11 is placed in front of the support roller 12 with respect to the conveying direction 3, and in the second roller position the guide roller 11 and the support roller 12 are preferably at the same height with respect to the conveying direction 3 or the guide roller 11 is even placed behind the support roller 12. The control device 50 can be set up for this purpose to send the corresponding manipulation signal to the actuator 70.

[0052] In order to be able to achieve a substantially continuous winding of the metal strip 2 on the first and second coilers 20, 30 independently of the strip thickness, the control device 50 is suitably set up to cause a change in the position of the guide roller 11 in time before or after dividing the metal strip 2 by means of the dividing device 40, depending on the thickness of the metal strip 2 and / or the conveying speed of the metal strip 2. Here, "continuous winding of the metal strip 2" should mean: a change of the winding device, especially from the first coiler 20 to the second coiler 30, which is carried out without interrupting the manufacturing process of the metal strip 2. Below, it will be elaborated in more detail Figure 2 in which cases the guide roller 11 is repositioned in time before or after dividing the metal strip 2.

[0053] By means of a data connection or signal connection to the dividing device 40, the control device 50 can hereby coordinate the moment of repositioning the guide roller 11 precisely with the moment at which the metal strip 2 is divided. For example, a signal or data characterizing the moment of the division can be provided by the dividing device 40. As an alternative, the control device 50 can also be set up to cause the dividing device 40 to divide the metal strip 2 at a pre-given moment.

[0054] The control device 50 is capable of receiving information on the thickness and / or conveying speed of the metal strip 2 from the sensor unit 60. Here, the sensor unit 60 is set up to measure the thickness and / or conveying speed of the metal strip 2. As an alternative or addition, for example when the control device 50 is at least part of an automation unit, these parameters can also be ascertained, in particular calculated, by the control device 50 itself.

[0055] Figure 2 The first roller position P1 and the second roller position P2 of the guide roller 11 are shown. In the first roller position P1, the guide roller 11 is placed in front of the support roller 12 with respect to the conveying direction 3 of the metal strip 2 guided by the pair of rollers, where the guide roller 11 and the support roller 12 form a pair of rollers. In contrast, in the second roller position P2, the guide roller 11 is preferably arranged at the same height as the support roller 12 or placed behind the support roller 12 with respect to the conveying direction 3. This is outlined by the vertically drawn dashed line that extends perpendicular to the conveying direction 3.

[0056] When repositioning, the guide roller 11 is advantageously moved parallel to the conveying direction 3. Preferably, the movement stroke d passed through here is quite large compared to the thickness of the metal strip 2 of a few millimeters, so that when the guide roller 11 is in the first roller position P1, the pair of rollers can reliably turn the head end 4 of the metal strip 2 into the guiding shaft 21 leading to the first coiler (not shown). The movement stroke d can be, for example, about 10 to 100 times the strip thickness. A typical movement stroke d is about 200 mm to 350 mm.

[0057] If the metal strip 2 is guided by the guide roller 11 to the first coiler, the metal strip 2 passes through the guiding shaft 21 on the first conveying path 22 outlined by the dashed line. The guiding shaft 21 is defined on one side by the second guiding element 24. Here, the gap 26 between the guide roller 11 in the second roller position P2 and the second guiding element 24 must be constructed very narrow, for example 10 mm or narrower, so that the head end 4 of the very thin metal strip 2 can be guided by the guide roller 11 across the gap 26 also on the second conveying path 32 leading to the second coiler (not shown) outlined by the dashed line. If the width of the gap 26 is chosen too large, there is a risk that the very thin metal strip 2 bends too strongly due to its own weight and collides laterally with the second guiding element 24 with its head end 4 instead of traveling along the surface of the second guiding element.

[0058] Thus, when the guide roller 11 is in the second roller position P2, it is also possible to feed the thin metal strip 2 with a thickness of less than 6 - 13 mm to the first coiler via the first conveying path 22 without damage, especially without colliding with the guiding shaft 21 or the second guiding element 24, which is impossible for a thick metal strip 2 with a thickness of 6 - 13 mm or more. Only when the guide roller 11 is in the first roller position P1 can such a thick metal strip 2 be fed to the first coiler via the first conveying path 22 without concern. If the thick metal strip 2 is first wound by the first coiler and if the winding is to be continued by the second coiler, then the guide roller 11 can only be positioned in the second roller position P2 when no metal strip 2 passes through the guiding shaft 21 or at least no metal strip 2 is arranged between the guide roller 11 and the second guiding element 24.

[0059] After the metal strip 2 is segmented, the movement of the guide roller 11 can be carried out starting from a certain precise strip thickness, which depends on the casting speed and thus also on the conveying speed. At lower speeds, the strip can be thinner, and at higher casting speeds, this is only possible for thicker strip thicknesses.

[0060] Figure 3 An example of a metal strip divided into a leading metal strip section 2a and a subsequent metal strip section 2b is shown. The leading metal strip section 2a travels on the first conveying path 22 to the first coiler 20 via the guide roller 11 of the guide roller pair 10. Here, the guide roller 11 is positioned in the first roller position. In this first roller position, the guide roller 11 is placed in front of the support roller 12 of the guide roller pair 10 with respect to the conveying direction 3.

[0061] When the metal strip is segmented, a gap L is formed between the head end 4 of the subsequent metal strip section 2b and the tail end 5 of the leading metal strip section 2a. The gap L may also expand after segmentation, for example, due to an increase in the winding speed of the first coiler 20.

[0062] By forming the gap L, sufficient time can be gained to position the guide roller 11 in the second roller position, in which the guide roller 11 is preferably at the same height as the support roller 12 with respect to the conveying direction 3, or even placed behind the support roller 12, before the head end 4 of the subsequent metal strip section 2b reaches the guide roller pair 10. Here, it is appropriate that the repositioning of the guide roller 11 starts only after the tail end 5 of the leading metal strip section 2a leaves the guide roller pair 10. If the metal strip is a thick metal strip with a strip thickness of, for example, greater than 6 - 13 mm, it is possible to prevent the leading metal strip section 2a from being clamped between the guide roller 11 and the second guiding element 24 arranged downstream of the guide roller pair 10.

[0063] Figure 4 An example of a method 100 for winding a metal strip 2 is shown.

[0064] In method step S1, the metal strip 2 is guided to the first coiler 20 by means of a roller pair 10. Here, the metal strip 2 travels on the first conveying path 22 towards the first coiler 20 by means of a roller 11 of the roller pair 10 in a first roller position.

[0065] In another method step S2, it is decided whether the roller 11 is to be repositioned to a second roller position before or after the metal strip 2 is divided by means of a dividing device 40 in terms of time. For this purpose, for example, it can be checked whether the method duration required to reposition the roller 11 is greater than the following duration: the duration during which the roller pair 10 does not guide the metal strip 2 after the metal strip 2 has been divided. If this is not the case, that is, as already described above Figure 3 and there is sufficient time for repositioning the roller 11, then first, in another method step S3a, the metal strip 2 is divided by means of the dividing device 40. When the metal strip 2 is divided, a leading metal strip section 2a with a tail end 5 and a subsequent metal strip section 2b with a head end 4 are produced.

[0066] Advantageously, in method step S3a, the winding speed of the first coiler 20 is increased simultaneously or at least immediately after the metal strip 2 has been divided, and thus the conveying speed on the first conveying path 22 is increased.

[0067] Once the tail end 5 of the leading metal strip section 2a has left the roller pair 10, a time window for repositioning the roller 11 is opened. In another method step S4a, the roller 11 is accordingly moved to the second roller position as outlined by the arrow.

[0068] The end of this time window is defined by the arrival of the head end 4 of the subsequent metal strip section 2b at the roller pair 10. At this moment, the roller 11 is already in the second roller position. Now, in another method step S5a, the roller pair 10 accordingly guides the subsequent metal strip section 2b on the second conveying path 32 to a second coiler (not shown). The leading metal strip section 2a wound by means of the first coiler 20 can be removed, and thus the first coiler 20 can be prepared for reuse.

[0069] If the check in method step S2 shows that the method duration required to reposition the roller 11 is greater than the following duration: the duration during which the roller pair 10 does not guide the metal strip 2 after the metal strip 2 has been divided, then in another method step S3b, the roller 11 is first moved to the second roller position. This is outlined by the arrow.

[0070] After the guide roller 11 has been positioned in the second roller position, the metal strip 2 can be divided by means of the dividing device 40. This is done in a further method step S4b.

[0071] If the leading end 4 of the subsequent metal strip section 2b reaches the roller pair 10, the subsequent metal strip section 2b is guided onto the second conveying path 32. Thus, in a further method step S5b, the subsequent metal strip section 2b is conveyed by the guide roller 11 on the second conveying path 32 to the second coiler.

[0072] Whether the time window during which the roller pair 10 does not guide the metal strip 2 is sufficient for repositioning the guide roller 11 depends crucially on the conveying speed used for conveying the leading metal strip section 2a and the conveying speed used for conveying the subsequent metal strip section 2b (on the first conveying path 22). The conveying speed of the subsequent metal strip section 2b is usually constant and corresponds to the thickness of the metal strip 2, since the mass flow is constant in the case of continuously manufacturing the metal strip 2. The conveying speed of the leading metal strip section 2a - since the metal strip 2 has been divided - can be adjusted independently thereof, for example by the winding speed of the first coiler 20. However, the conveying speed is usually limited. Thus, if the metal strip 2 is a thin metal strip 2 with a strip thickness of, for example, 6.5 mm or less, the conveying speed of the leading metal strip section 2a can only be increased to slightly above the conveying speed of the subsequent metal strip section 2b pre - given by the manufacturing process of the metal strip 2. Thus, for such a metal strip 2, the leading end 4 of the subsequent metal strip section 2b reaches the roller pair 10 before the guide roller 11 can be positioned in the second roller position.

[0073] Thus, the check in method step S2 can be based on the thickness and / or the conveying speed of the metal strip 2. As an alternative, a decision can also be made in method step S2 by considering a look - up table: whether the guide roller 11 should be moved before or after dividing the metal strip 2 in terms of time, wherein the look - up table stores an indication of the moment of repositioning of the guide roller 11 depending on the strip thickness and / or the conveying speed.

[0074] Although the invention has been illustrated and described in detail in terms of preferred embodiments, the invention is not limited to the disclosed examples, and other variants can be derived therefrom by those skilled in the art without departing from the scope of protection of the invention.

[0075] List of reference numerals

[0076] 1 System

[0077] 2 Metal strip

[0078] 2a leading metal strip section

[0079] 2b subsequent metal strip section

[0080] 3 conveying direction

[0081] 4 head end

[0082] 5 tail end

[0083] 10 roller pair

[0084] 11 guide roller

[0085] 11a shaft

[0086] 12 support roller

[0087] 12a shaft

[0088] 20 first coiler

[0089] 21 guiding shaft

[0090] 22 first conveying path

[0091] 23 first guiding element

[0092] 24 second guiding element

[0093] 25 conveying roller

[0094] 26 gap

[0095] 30 second coiler

[0096] 32 second conveying path

[0097] 40 splitting device

[0098] 50 control device

[0099] 60 sensor unit

[0100] 70 actuator

[0101] 100 method

[0102] S1 - S5a, b method steps

[0103] P1 first roller position

[0104] P2 second roller position

[0105] L gap

[0106] D moving stroke

Claims

1. A method (100) for winding a continuously manufactured metal strip (2), comprising: -(S1) guiding the metal strip (2) along a first conveying path (22) to a first coiler (20) by a guide roller (11) positioned in a first roller position (P1) of a pair of guide rollers (10); -(S3a, S4b) dividing the metal strip (2) upstream of the pair of guide rollers (10); and -(S3b, S4a) repositioning the guide roller (11) of the pair of guide rollers (10) into a second roller position (P2), in which the metal strip (2) is guided along a second conveying path (32) to at least one second coiler (30) (S5a, S5b) by the guide roller (11), wherein the repositioning of the guide roller (11) is carried out either before or after dividing the metal strip (2) in time depending on the thickness of the metal strip (2) and / or the conveying speed of the metal strip (2).

2. The method (100) according to claim 1, wherein When the guide roller (11) is repositioned after the metal strip (2) is split in terms of time, the guide roller (11) is repositioned in a time interval relative to the time of splitting the metal strip (2), and the time interval depends on the thickness of the metal strip (2) and / or the conveying speed of the metal strip (2).

3. The method (100) according to claim 1 or 2, wherein it is checked (S2) whether the method duration required to reposition the guide roller (11) is greater than the following duration: the pair of guide rollers (10) does not guide the metal strip (2) during this duration after dividing the metal strip (2), and based on the result of this check, the guide roller (11) is repositioned either before or after dividing the metal strip (2) in time.

4. The method (100) according to claim 3, wherein - the metal strip (2) is divided into a leading metal strip section (2a) and a succeeding metal strip section (2b), wherein the leading metal strip section (2a) is wound by the first coiler (20) and the succeeding metal strip section (2b) is wound by the second coiler (30), and - the check is based on the difference between a first duration from the division of the metal strip (2) until the head end (4) of the succeeding metal strip section (2b) reaches the pair of guide rollers (10) and a second duration from the division of the metal strip (2) until the tail end (5) of the leading metal strip section (2a) exits the pair of guide rollers (10).

5. The method (100) according to claim 1 or 2, wherein it is decided on the basis of a look-up table whether the repositioning of the guide roller (11) should be carried out before or after dividing the metal strip (2) in time.

6. The method (100) according to any one of the preceding claims, wherein the thickness and / or the conveying speed of the metal strip (2) is calculated by means of an automation unit or measured by means of a sensor unit (60).

7. The method (100) according to any one of the preceding claims, wherein after the metal strip (2) is split, the conveying speed on the first conveying path (22) is increased in order to create a gap (L) of a pre-given size that is formed between the leading metal strip section (2a) and the subsequent metal strip section (2b) when the metal strip (2) is split.

8. The method (100) according to any one of the preceding claims, wherein the metal strip (2) is manufactured by a continuous casting and rolling composite device such that the metal strip (2) has a thickness of at least 0.5 mm, preferably at least 0.8 mm and / or up to 25.4 mm or more, preferably up to 30 mm or more when it reaches the pair of guide rollers (10).

9. The method (100) according to any one of the preceding claims, wherein, When the metal strip (2) has a thickness of 6 mm or less, the guide roller (11) has been repositioned before the metal strip (2) is split, and only when the metal strip (2) has a thickness of 6 - 13 mm or more, the guide roller (11) is repositioned after the metal strip (2) is split.

10. A system (1) for winding a continuously manufactured metal strip (2), having - a pair of guide rollers (10) having repositionable guide rollers (11), - a first coiler (20) arranged downstream of the pair of guide rollers (10), - at least one second coiler (30) arranged downstream of the first coiler (20), - at least one splitting device (40) arranged upstream of the pair of guide rollers (10) for splitting the metal strip (2), and - a control device (50) which is configured to: depending on the thickness of the metal strip (2) and / or the conveying speed of the metal strip (2), reposition the guide roller (11) from a first roller position (P1) to a second roller position (P2) either before or after splitting the metal strip (2) by means of the splitting device (40) in time, wherein in the first roller position the metal strip (2) can be guided by the guide roller (11) along a first conveying path (22) to the first coiler (20), and in the second roller position the metal strip (2) can be guided along a second conveying path (32) to at least one second coiler (30).

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