Determining lateral offset of metal strip as function of profile of end side of coil

Abstract

The rolling plant has at least one rolling stand (1) and an uncoiler (2) arranged upstream of the rolling stand (1). A metal strip (4) which is wound into a coil (3) is unwound by an unwinder (2) and is supplied from there to a rolling stand (1). A metal strip (4) is rolled in a rolling stand (1). The respective section (i) of the metal strip (4) has a respective lateral offset (V) in a predetermined distance in front of the rolling stand (1). A control device (8) for the rolling stand (1) ascertains a respective adjustment variable (C) for at least one adjustment mechanism (12) associated with the rolling stand (1) using the respective lateral offset (V) and actuates the adjustment mechanism (12) as a function of the ascertained respective adjustment variable (C). Before the metal strip (4) is unwound, a control device (8) is made to know the contour (K) of at least one end face (11) of the coil (3) which is still wound up at a time. Thus, before the metal strip (4) is supplied to the rolling stand (1), the control device (8) is provided with information about the lateral offset (V) of the section (i) over the entire length of the metal strip (4). The control device (8) detects the respective lateral offset (V) using the contour (K).

Description

Technical Field

[0001] The invention relates to an operating method for a rolling mill having at least one rolling stand and an unwinder arranged upstream of the rolling stand.

[0002] - in which the metal strip wound up into a coil is uncoiled in the rolling mill by an uncoiler, from where it is fed to a rolling stand and rolled in the rolling stand,

[0003] - wherein, using a corresponding lateral offset of a corresponding section of the metal strip at a predetermined distance in front of the rolling stand, a control device for the rolling stand acquires a corresponding adjustment variable for at least one adjustment mechanism associated with the rolling stand and controls the adjustment mechanism as a function of the acquired corresponding adjustment variable.

[0004] The invention further relates to a control program for a control device of a rolling stand for rolling metal strips, wherein the control program comprises a machine code that can be processed by the control device, wherein the machine code is processed by the control device in order to operate the control device according to such an operating method.

[0005] The invention further relates to a control device for a rolling stand of a rolling mill, wherein the control device is programmed with such a control program so that the control device implements such a control program during operation.

[0006] The invention furthermore relates to a rolling mill having at least one rolling stand, a decoiler arranged upstream of the rolling stand, and a control device for the rolling stand. Background Art

[0007] Such an operating method is known, for example, from DE 3413269 C2. Summary of the invention

[0008] When rolling a metal strip, the rolled metal strip is usually moved out laterally, that is to say in the width direction of the metal strip. Such a movement can take place both on the input side and also on the output side of the rolling stand. Thus, in a multi-stand rolling train, such a movement can also take place between the individual stands of the rolling train.

[0009] Small lateral displacements are usually not a problem. However, in the case of larger lateral displacements, the metal strip may collide with the lateral guides and thus produce a so-called upward displacement. In addition, lateral displacements can influence the quality parameters of the rolled metal strip, such as, for example, the profile, the flatness and also the thickness wedge. This also applies to small lateral displacements of the metal strip.

[0010] It is known in the prior art to detect lateral deflections of the metal strip on the exit side of the rolling stand, for example by means of a camera, and to set adjustment variables for adjustment mechanisms of the rolling stand as a function of the deflections detected on the exit side. Purely by way of example, reference can be made to EP 3202502 A1.

[0011] It is also known to detect the lateral deflection of the metal strip on the inlet side of the rolling stand and to set actuating variables for the adjusting mechanism of the rolling stand as a function of the deflection detected on the inlet side. Purely by way of example, reference can be made to the already mentioned DE 34 13 269 C2.

[0012] In DE 3413269 C2, the lateral deflection of a metal strip is detected for each individual section at the inlet side of the rolling stand and used within the framework of a conventional control system (eg proportional control).

[0013] The process of DE 34 13 269 C2 is only practical if the metal strip is present as a flat metal strip, ie not in a coiled state of the metal strip.

[0014] The object of the invention is to provide a possibility by means of which lateral deviations of the respective sections of the metal strip can be taken into account even when the metal strip is wound up to form a coil and unwound before it is rolled in a rolling stand.

[0015] This object is achieved by an operating method having the features of claim 1. Advantageous embodiments of the operating method are the subject matter of dependent claims 2 to 4.

[0016] According to the invention, an operating method of the type mentioned at the outset is designed in such a way that, before the metal strip is uncoiled, the control device is informed once of the contour of at least one end side of the coil that is still being coiled, so that information about the lateral deviation of a section within the entire length of the metal strip is already provided to the control device before the metal strip is fed to the rolling stand, and the control device detects the corresponding lateral deviation using the contour.

[0017] The adjusting mechanism can be, in particular, an adjusting mechanism by means of which the roll gap can be adjusted asymmetrically. This allows the lateral strip run to be directly influenced. A typical example of such an adjusting mechanism is a wedge adjustment of the roll gap. As an alternative or in addition, however, adjusting variables can also be acquired for other adjusting mechanisms, in particular for adjusting mechanisms that only locally or, although globally, symmetrically influence the profile and flatness of the metal strip. A typical example of an adjusting mechanism that only acts locally is a cooling device that acts only on a single section of the working roll, viewed in the width direction of the metal strip. A typical example of an adjusting mechanism that acts globally but symmetrically is a roll bending section. Another typical example is a roll displacement section.

[0018] In the simplest case, the control variable is determined in the sense of a conventional target-actual control, for example by means of a P controller, a PI controller or a PID controller. However, more complex control, for example model-predictive control, is also possible, since the course of the lateral deflection is already detected in advance over the entire length of the metal strip by the profile of the end face. Furthermore, it is also possible to foreseeably take into account the course of the lateral deflection in other ways. For example, the control variable can be optimized offline in advance over the entire strip length.

[0019] Usually, the control device is only aware of the contour of a single end side of the coil. In this case, the control device can only detect the lateral deviation, assuming that the width of the metal strip is constant over the length of the metal strip. However, it is also possible as an alternative to make the control device aware of the contour of both end sides of the coil. In this case, the control device can not only detect the corresponding lateral deviation, but also, for example, the corresponding width of the metal strip for individual sections of the metal strip and take this into account when controlling the rolling stand. This is particularly advantageous if the width of the metal strip can be influenced by means of an adjusting mechanism. In particular, in this case, the adjusting mechanism can be an adjusting mechanism of the rolling stand itself or an adjusting mechanism assigned to the rolling stand, for example a ring lifter (Schlingenheber) arranged in front of or behind the rolling stand, or an upsetting machine arranged in front of or behind the rolling stand.

[0020] In principle, the end profile can be detected at any time after the metal strip has been coiled into a coil, in particular directly after coiling or at another time between coiling and feeding to the uncoiler. Preferably, however, the end profile is detected while the coil is already in the uncoiler by means of a detection device assigned to the uncoiler and then supplied to the control device. As a result, the execution of the operating method is less dependent on data supplied or provided from the outside.

[0021] The detection device can be, for example, a thermal imager or a camera operating with light in the visible range, with the aid of which a conventional two-dimensional image is detected. It can also be a camera with the aid of which a depth image is detected. It is also possible that the detection device is designed as a laser scanner with the aid of which the contour of the end face is scanned. Other designs are also possible. Detection devices of all the types mentioned are generally known to those skilled in the art.

[0022] In a preferred embodiment of the operating method, the control device is informed of the contour of the end side of the coil in the form of a contour line extending from the radial inside to the radial outside with respect to the end side of the coil. The contour line thus indicates the lateral position of the detected strip edge as a function of the distance from the perforation of the coil. In this case, the control device determines the corresponding lateral deviation using the contour line.

[0023] Alternatively, it is possible to provide the control device with the profile of the end side of the coil in the form of a two-dimensional profile surface with respect to the end side of the coil. In this case, of course, the two-dimensional profile surface can be used directly. Preferably, however, the control device in this case determines a contour line extending from the radial inside to the radial outside with respect to the end side of the coil from the contour surface, and also determines the corresponding lateral deviation when using the contour line, but not the two-dimensional profile surface itself. As before, the contour line indicates the lateral position of the detected belt edge as a function of the distance from the eyelet of the coil.

[0024] The use of contour lines significantly reduces the computational complexity for determining the corresponding lateral offset.

[0025] Based on the contour line, the control device firstly knows the offset of the corresponding section of the metal strip in the current coil radius (=current position on the radial contour line). This position corresponds to the support point when viewed in the longitudinal direction of the metal strip. The distance to the next support point is obtained by the current coil radius (multiplied by the factor 2π). The new coil radius is obtained by the current coil radius and the thickness of the wound metal strip. In the case of a working direction from the outside to the inside, the coil radius decreases, so the thickness of the wound metal strip is subtracted. In the case of a working direction from the inside to the outside, the coil radius increases, so the thickness of the wound metal strip is added. Therefore, the control device only knows the offset of the corresponding section of the metal strip at the support points, which follow each other in the longitudinal direction of the strip, through the contour line. Because the coil radius changes, the support points are not equidistant to be exact. However, this is secondary.

[0026] It is possible to define the sections of the metal strip by the support points themselves, ie to create a 1:1 correlation. Alternatively, however, it is also possible to use interpolation as required. The interpolation can be linear or nonlinear as required.

[0027] In the context of the operating method according to the invention, the metal strip can be cold-rolled or hot-rolled in the rolling stand as required. In particular, in the case of hot rolling, the rolling mill can be designed, for example, as a Steckel mill. In the case of cold rolling, the rolling stand can, in particular, be the frontmost rolling stand of a tandem train.

[0028] The object is further achieved by a control program having the features of claim 5. According to the invention, the processing of the control program is initiated by the control device.

[0029] - before the metal strip is unwound by an unwinder arranged in front of the rolling stand, the control device is informed once of the contour of at least one end side of the coil that is still being wound up, so that the control device is provided with information about the lateral deflection of the section of the metal strip that is at a predetermined distance in front of the rolling stand over the entire length of the metal strip,

[0030] - the control device determines the corresponding lateral offset for the segment using the contour, and

[0031] The control device, using the corresponding lateral offset, determines a corresponding actuating variable for at least one adjusting device assigned to the rolling stand and actuates the adjusting device as a function of the determined corresponding actuating variable.

[0032] The control program can also be designed in an advantageous manner. The design of the control program corresponds to the advantageous design of the operating method. The same applies to the advantages achieved thereby.

[0033] This object is further achieved by a control device having the features of claim 8. According to the invention, the control device is programmed with a control program according to the invention so that the control device executes the control program according to the invention during operation.

[0034] This object is further achieved by a rolling mill having the features of claim 9. According to the invention, in a rolling mill of the type mentioned at the outset, the control device is designed as a control device according to the invention.

[0035] Preferably, the uncoiler is assigned a detection device, by means of which the profile of the end face is detected while the coil is already in the uncoiler, and then the profile is supplied to the control device. Thus, the operation of the rolling mill according to the invention is less dependent on data supplied or provided from the outside.

[0036] The rolling mill stand of the rolling mill can be configured as a hot rolling mill stand or as a cold rolling mill stand as required. In the case mentioned at the beginning, the rolling mill can be configured in particular as a Steckel mill. In the last-mentioned case, the rolling mill stand can in particular be the frontmost rolling mill stand of a multi-stand tandem train. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above-described performance, features and advantages of the present invention and the methods and means for achieving them will become clearer and more obvious in conjunction with the following description of the embodiments, which are explained in more detail in conjunction with the accompanying drawings. Here, a schematic diagram is shown:

[0038] Figure 1 shows the rolling equipment,

[0039] Figure 2 Additional rolling equipment is shown,

[0040] Figure 3 shows a flow chart,

[0041] Figure 4 Shown along Figure 1 and Figure 2 The section of line IV-IV in

[0042] Figure 5 shows a flow chart,

[0043] Figure 6 shows a perspective view of the end face of the coil, and

[0044] Figure 7 A flow chart is shown. DETAILED DESCRIPTION

[0045] according to Figure 1 The rolling mill has a rolling stand 1. Only the working rolls of the rolling stand 1 are shown. Figure 1 In the design of the present invention, the rolling stand 1 is the only rolling stand of the rolling plant. The decoiler 2 is arranged in front of the rolling stand 1. The coil 3, that is, the wound metal strip 4, is uncoiled by the decoiler 2. The uncoiled metal strip 4 is supplied to the rolling stand 1 from the decoiler 2. The metal strip 4 is rolled in the rolling stand 1. The coil 3 can be supplied to the decoiler 2 itself, that is, as a metal strip 4 that was previously wound in another way. Alternatively, the metal strip 4 can be wound into the coil 3 itself before being uncoiled by the decoiler 2.

[0046] In accordance with Figure 1 In the embodiment of the present invention, a coiler 5 is arranged behind the rolling stand 1. The metal strip 4 is coiled by the coiler 5 after being rolled in the rolling stand 1. Figure 1The rolling mill is operated in such a way that the metal strip 4 is rolled reversibly in the rolling stand 1, so that the end parts of the metal strip 4 are not rolled together. Therefore, the unwinder 2 and the coiler 5 change their respective functions in each rolling pass. In particular, in such a design, the metal strip 4 is alternately coiled by the same coiler 2, 5 and then unwinded again.

[0047] according to Figure 1 The rolling mill can be designed in particular as a Steckel mill. In the Steckel mill, the metal strip 4 is hot rolled. In this case, the rolling stand 1 is then designed as a hot rolling stand. However, the metal strip 4 can also be hot rolled in other designs of the rolling mill. For example, the metal strip 4 can also be hot rolled in a multi-stand hot rolling mill, in which the uncoiler 2 is arranged in front of the hot rolling mill. Figure 1 In the embodiment of the rolling train shown in FIG, the rolling stand 1 can also be a pre-rolling stand.

[0048] Figure 2 An alternative embodiment of a rolling mill is shown. Figure 2 , the rolling mill has a further rolling stand 6 in addition to the rolling stand 1. In this case, the rolling stand 1 is the frontmost rolling stand of the multi-stand rolling train. Figure 1 In the rolling stands 1 and 6 , only the working rolls are shown.

[0049] Even in accordance with Figure 2 In the case of the embodiment of the present invention, the uncoiler 2 is also arranged in front of the rolling stand 1. The uncoiler 2 is supplied with a coil 3, i.e. a previously coiled metal strip 4. The metal strip 4 is uncoiled by the uncoiler 2 and from there supplied to the rolling stand 1 (and thereafter to the further rolling stand 6). The metal strip 4 is rolled in the rolling stand 1 (and also in the further rolling stand 6).

[0050] As already mentioned, even in accordance with Figure 2 In the case of the design of the metal strip 4 can also be hot rolled. Figure 2 An S-roller set 7 is arranged between the unwinder 2 and the rolling stand 1. Such a design is common in particular in multi-stand tandem mills, in which the metal strip 4 is cold-rolled. However, the metal strip 4 can also be cold-rolled in other designs of the rolling mill.

[0051] Not only in accordance with Figure 1 In the rolling equipment, and also in accordance with Figure 2In a rolling mill of the type described above, at least the rolling stand 1 (usually the entire rolling mill) is controlled by a control device 8. The control device 8 is programmed with a control program 9, so that the control device 8 implements the control program 9 during operation. The control program 9 includes a machine code 10, which can be processed by the control device 8. The control device 8 causes the processing of the machine code 10, so that the control device 8 operates at least the rolling stand 1, as already mentioned, and usually the entire rolling mill, according to the operating method, which is then combined with the Figure 3 Let’s explain this in more detail.

[0052] according to Figure 3 , in step S1, the control device 8 is informed of the contour K of at least one of the two end sides 11 of the coil 4. It is also possible that in step S1, the control device 8 is informed of the contour K of both end sides 11 of the coil 4. However, usually the contour K of one of the two end sides 11 is sufficient. Therefore, this situation is assumed below. Step S1 is carried out by the control device 8 before the metal strip 4 is unwound.

[0053] In step S2, the control device 8 determines the corresponding lateral offset V for the section i (i=1, 2, 3, ...) of the metal strip 4. The corresponding offset V can then vary within the section i. The offset V corresponds to the deviation of the center line of the metal strip 4 from the center line of the rolling stand 1 as viewed in the width direction of the metal strip 4. The offset V of the corresponding section i is determined for a predetermined distance of the corresponding section i from the rolling stand 1. The offset V is determined using the profile K.

[0054] The predetermined distance can be determined as required. In particular, it can be the position at which the metal strip 4 is separated from the rest of the coil 3. This determination of the predetermined distance can be particularly meaningful if there are no devices between the uncoiler 2 and the rolling stand 1 that would influence or hinder the lateral movement of the metal strip 1. However, it can also be other positions. Figure 2 In the case of a design, the predetermined spacing can be determined, for example, by the position of the S-roller set 7. Which position is selected depends on the specific circumstances of the particular application.

[0055] In step S3, the control device 8 acquires the corresponding adjustment variable C for at least one adjustment mechanism 12. The adjustment mechanism 12 can be an adjustment mechanism of the rolling stand 1 itself, for example, acting locally or globally on the roll gap. Alternatively, the adjustment mechanism 12 can be arranged in front of or behind the rolling stand 1. The acquisition of the corresponding adjustment variable C is applicable to the corresponding section i of the metal strip 4. The corresponding adjustment variable C is acquired by the control device 8 using the corresponding lateral offset V. Suitable adjustment mechanisms 12, suitable adjustment variables C and suitable acquisition methods are known to those skilled in the art. In step S4, the control device 8 controls the adjustment mechanism 12 according to the acquired corresponding adjustment variable C.

[0056] Step S1 is performed only once, i.e., before the metal strip 4 is supplied to the rolling stand 1. Step S4 is performed iteratively and repeatedly, i.e., for each individual section i of the metal strip 4. Steps S2 and S3 can be performed only once or iteratively and repeatedly. It is up to a person skilled in the art to decide which processing method to adopt for steps S2 and S3. It is usually advantageous to perform step S2 together with step S1, i.e., perform it once in advance, and to perform step S3 together with step S4, i.e., perform iteratively and repeatedly.

[0057] The method and manner in which the contour K of the end side 11 is made known to the control device 8 can be determined according to requirements. For example, it is possible that the contour K is pre-specified to the control device 8 by an operator or a superior control device. However, it is preferred that the uncoiler 2 is assigned a detection device 13, by means of which the contour K of the end side 11 is detected while the coil 3 is already in the uncoiler 2. In this case, the detection device 13 supplies the detected contour K to the control device 8. The control device 8 receives the detected contour K from the detection device 13. In this way and manner, the control device 8 is made aware of the contour K.

[0058] Combined with Figure 4 and Figure 5 In order to determine the preferred method and manner in which the contour K can be provided to the control device 8 .

[0059] Figure 4 Shown along Figure 1 and Figure 2 The section of line IV-IV in Figure 4, the coil 3 has a coil eye 14. The coil eye 14 has a diameter D1. R1=D1 / 2 is therefore the minimum radius of the coil 3. The coil 3 also has an outer diameter D2. R2=D2 / 2 is therefore the maximum radius of the coil 3. The metal strip 4 has a thickness d. The individual turns 15 of the coil 3 are spaced apart from each other in the radial direction of the coil 3 (i.e. viewed from the inside to the outside, or vice versa from the outside to the inside) by the thickness d of the metal strip 4. In addition, the individual turns 15 of the coil 3 are slightly offset from each other laterally (i.e. viewed in the width direction of the metal strip 4). The contour K of the end side 11 follows the slight lateral offset of the turns 15. Along the section line IV-IV (see Figure 1 and Figure 2 ), a contour line KL is thus obtained with respect to the corresponding end side 11 of the coil 3, which describes the deviation of the turns 15 in the range from R1 to R2, i.e. from the radial inside to the radial outside (or vice versa) as a function of the respectively current coil radius r. If the section line through the coil 3 is set differently, a completely similar contour line KL is also obtained.

[0060] according to Figure 5 It is possible for the control device 8 to receive the contour K of the end face 11 of the coil 3 in the form of such a contour line KL in step S11 .

[0061] The position of the outermost winding 15 corresponds to the starting point of the metal strip 4. The value of the contour line KL at this position corresponds to the offset of the frontmost section i=1 of the metal strip 4. The radius r of the next inner winding 15 can be easily determined by subtracting the thickness d of the metal strip 4 from the radius r. The contour line KL can be re-evaluated by the control device 8 at this position of the metal strip 4. This procedure can be gradually repeated for all windings 15 of the metal strip 4. Therefore, the control device 8 can gradually determine the lateral offset of the metal strip 4 at this position in step S12 for all windings 15 and therefore for the support points spaced apart from each other by a spacing of 2πr (wherein the current coil radius r is variable). Therefore, a functional curve for the lateral offset of the metal strip 4 is obtained over the entire length of the metal strip 4. From this offset, the lateral offset V for the section i can be easily determined.

[0062] In the simplest case, the segments i are determined by the support points. In this case, the segments i are not of the same size. If the segments i should be of the same size or should meet other criteria, interpolation can be performed between adjacent support points as required.

[0063] Steps S11 and S12 therefore correspond to Figure 3 A feasible implementation of steps S1 and S2.

[0064] Combined with Figure 6 and Figure 7 In order to obtain further preferred methods and means by which the contour K can be provided to the control device 8 .

[0065] Figure 6 The end face 11 of the coil 3 is shown in a three-dimensional view. With the aid of a suitable detection device 13, it is possible to easily detect the profile surface KF, which reflects, as it were, a three-dimensional "offset mountain range" over the entire end face 11. If the detection device 13 is designed as a laser scanner, for example, the entire end face 11 can be scanned two-dimensionally. However, other methods of processing are also possible.

[0066] according to Figure 7 It is possible that the control device 8 receives the contour K of the end side 11 of the coil 3 in the form of such a contour surface KF in step S21. In this case, the control device 8 can, for example, in step S22 obtain the contour line KL based on the contour surface KF. In particular, the control device 8 can select and evaluate a narrow strip of the contour surface KF extending from the radial inside to the radial outside. In step S23, the control device 8 can then obtain the corresponding lateral offset V of the segment i using the contour line KL. The contour surface KF itself is no longer required for the implementation of step S23. Therefore, Figure 7 Step S23 can be particularly related to Figure 5 This corresponds to step S12.

[0067] Therefore, steps S21 to S23 correspond to Figure 3 Another possible implementation of steps S1 and S2.

[0068] The invention has many advantages. By detecting the profile K of the end side 11, information about the lateral offset V of the section i within the entire length of the metal strip 4 is easily available. This makes it possible to implement particularly advantageous control algorithms. An independent detection that is not based on external inputs is achieved by the detection directly at the uncoiler 2. In addition, it is ensured that influences occurring before the uncoiling are reliably identified and taken into account. The solution according to the invention is simple, robust and reliable and can also be retrofitted into existing rolling mills.

[0069] Although the present invention has been illustrated and described in more detail through preferred embodiments, the present invention is not limited to the disclosed examples, and those skilled in the art can derive other variations therefrom without departing from the scope of protection of the present invention.

[0070] List of reference numerals:

[0071] 1 Rolling stand

[0072] 2 Uncoiler

[0073] 3 Coil

[0074] 4 Metal belt

[0075] 5. Coiler

[0076] 6 additional rolling stands

[0077] 7S-Roller Group

[0078] 8 Control device

[0079] 9 Control Program

[0080] 10 Machine Code

[0081] 11. End side

[0082] 12 Adjustment mechanism

[0083] 13. Detection device

[0084] 14 coil holes

[0085] 15 turns

[0086] C Adjustment parameters

[0087] D1, D2 diameter

[0088] d belt thickness

[0089] i Segment of metal strip

[0090] K Profile

[0091] KF profile surface

[0092] KL Contour Line

[0093] R1, R2, r radius

[0094] Steps S1 to S23

[0095] V offset.

Claims

1. A method for operating a rolling mill having at least one rolling stand (1) and an unwinder (2) arranged upstream of the rolling stand (1), -in, In the rolling mill, a metal strip (4) wound into a coil (3) is unwound by the unwinder (2), from which the metal strip is fed to the rolling stand (1) and rolled in the rolling stand (1). - wherein, using a corresponding lateral offset (V) of a corresponding section (i) of the metal strip (4) at a predetermined distance in front of the rolling stand (1), a control device (8) for the rolling stand (1) acquires a corresponding adjustment variable (C) for at least one adjustment device (12) assigned to the rolling stand (1) and controls the adjustment device (12) as a function of the acquired corresponding adjustment variable (C), It is characterized in that Before the metal strip (4) is unwound, the control device (8) is informed once for all of the contour (K) of at least one end side (11) of the coil (3) still being wound up, so that before the metal strip (4) is supplied to the rolling stand (1), the control device (8) is provided with information on the lateral deviation (V) of the section (i) within the entire length of the metal strip (4), and the control device (8) acquires the corresponding lateral deviation (V) using the contour (K).

2. The operating method according to claim 1, It is characterized in that While the coil (3) is already in the uncoiler (2), the contour (K) of the end face (11) is detected by means of a detection device (13) associated with the uncoiler (2) and then supplied to the control device (8).

3. The operating method according to claim 1 or 2, It is characterized in that - the control device (8) is informed of the contour (K) of the end side (11) of the coil (3) in the form of a contour line (KL) extending from the radial inside to the radial outside with respect to the end side (11) of the coil (3), and the control device (8) determines the corresponding lateral deviation (V) using the contour line (KL), or - The control device (8) is enabled to understand the contour (K) of the end side (11) of the coil (3) in the form of a two-dimensional contour surface (KF) with respect to the end side (11) of the coil (3), the control device (8) obtains a contour line (KL) extending from the radial inside to the radial outside with respect to the end side (11) of the coil (3) based on the contour surface (KF), and the control device (8) obtains the corresponding lateral offset (V) by using the contour line (KL) but not the two-dimensional contour surface (KF) itself.

4. The operating method according to claim 1, 2 or 3, It is characterized in that The metal strip (4) is cold rolled or hot rolled in the rolling stand (1).

5. A control program for a control device (8) of a rolling stand (1) for rolling a metal strip (4), wherein: The control program comprises a machine code (10) which can be processed by the control device (8), wherein the processing of the machine code (10) is caused by the control device (8). - before the metal strip (4) is unwound by the unwinder (2) arranged in front of the rolling stand (1), the control device (8) is informed once of the contour (K) of at least one end side (11) of the coil (3) still to be wound up, so that the control device (8) is provided with information about the lateral deflection (V) of a section (i) of the metal strip (4) at a predetermined distance in front of the rolling stand (1) over the entire length of the metal strip (4), - the control device (8) determines the corresponding lateral deviation (V) for the section (i) using the profile (K), and - the control device (8) uses the corresponding lateral offset (V) to determine a corresponding adjustment variable (C) for at least one adjustment mechanism (12) associated with the rolling stand (1) and controls the adjustment mechanism (12) as a function of the determined corresponding adjustment variable (C).

6. The control program according to claim 5, It is characterized in that The processing of the machine code (10) is caused by the control device (8), which receives the contour (K) of the end side (11) from a detection device (13) assigned to the uncoiler (2) while the coil (3) is already located in the uncoiler (2).

7. The control program according to claim 5 or 6, It is characterized in that causing the processing of the machine code (10) to occur by the control device (8), the control device (8) receives the contour (K) of the end side (11) of the coil (3) in the form of a contour line (KL) extending from the radial inside to the radial outside with respect to the end side (11) of the coil (3) and determines the corresponding lateral deviation (V) using the contour line (KL), or - The control device (8) receives the contour (K) of the end side (11) of the coil (3) in the form of a two-dimensional contour surface (KF) relative to the end side (11) of the coil (3), and obtains a contour line (KL) extending from the radial inside to the radial outside relative to the end side (11) of the coil (3) based on the contour surface (KF), and obtains the corresponding lateral offset (V) by using the contour line (KL) but not the two-dimensional contour surface (KF).

8. A control device for a rolling stand (1) of a rolling mill, wherein: The control device is programmed with a control program (9) according to claim 5, 6 or 7, so that the control device implements the control program (9) during operation.

9. A rolling mill having at least one rolling stand (1), an unwinding machine (2) arranged upstream of the rolling stand (1), and a control device (8) for the rolling stand (1), It is characterized in that The control device (8) is designed as a control device according to claim 8.

10. The rolling equipment according to claim 9, It is characterized in that The uncoiler (2) is assigned a detection device (13), by means of which the contour (K) of the end side (11) is detected while the coil (3) is already in the uncoiler (2) and then supplied to the control device (8).

11. The rolling equipment according to claim 9 or 10, It is characterized in that The rolling stand (1) is designed as a hot rolling stand, in particular the rolling mill is designed as a Steckel mill, or the rolling stand (1) is designed as a cold rolling stand, in particular the frontmost rolling stand of a multi-stand tandem train.

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