Improved Adaptation of Role Models

Abstract

To provide means for optimizing a roll model capable of specifying temperature and a diameter of a roll in determination of a location when viewed in a direction of a roll shaft.SOLUTION: A storage device for two rolls of the same type is a component part of a roll stand or can be positioned relative to the roll stand so that the rolls can be transferred from the roll stand into the storage device. The storage device has a measuring system and can detect pieces of temperature and / or diameters of the rolls at predefined detection positions, as viewed in a direction of roll axes. After transmission to an automation unit that controls the roll stand, the unit can adapt a roll model. The pieces of temperature and / or the diameters of the rolls are repeatedly determined at predefined determination positions, as viewed in the direction of the roll axes, by using the roll model and by using operation data of the roll stand for the rolls of the same type.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention starts with a storage device for two rolls of the same type within a roll stand, the storage device being a component of the roll stand or being positionable relative to the roll stand in such a way that the roll can be transferred from the roll stand to the storage device or vice versa.

[0002] The present invention further starts with a method of operating a roll stand, where - flat rolling stock passing through the roll stand is rolled between two rolls of the same type within the roll stand, - an automation unit controlling the roll stand utilizes a roll model that uses the operating data of the roll stand for rolls of the same type to repeatedly identify the temperature and / or diameter of the rolls at at least a predefined specific position when viewed in the direction of the roll axis, and identifies the activation of the function of the roll stand based on the identified temperature and / or diameter, as a result of which the rolling gap of the roll stand is set during the rolling of the flat rolling stock in accordance with the setpoint input as much as possible, - rolls of the same type are occasionally removed from the roll stand and transferred to a roll changing carriage.

Background Art

[0003] During the rolling of a flat rolled stock made of metal, the rolling gap is typically calculated in the context of "level - 2" automation. A complex model is used to calculate the rolling gap, which takes into account, for example, roll settings, roll bending, roll flattening, roll camber, roll wear, roll temperature, the temperature of the rolled stock, and other factors. Some of the variables mentioned are specified as respective features across the width of the roll barrel. Thus, for example, the thicker the roll becomes locally as the roll temperature increases at each location (the term "locally" refers to the location as seen in the direction of the roll axis). Conversely, the thinner the roll becomes locally as the roll wear or abrasion increases at each location.

[0004] The smaller the rolling gap, the higher the absolute accuracy with which the rolling gap must be calculated. For example, in the case of a 3 cm rolling gap, an accuracy of 20 μm or 50 μm may be perfectly acceptable. In contrast, in the case of a 1.2 mm rolling gap, this type of accuracy is generally no longer acceptable.

[0005] As already mentioned, the rolling gap is affected, among other things, by the local temperature of the roll. Furthermore, the rolling gap is also affected by the wear that the roll undergoes during operation. In addition, the temperature of the material of the flat rolled stock also depends, within certain limits, on the temperature of the roll during processing, among other things. The temperature of the rolled stock is, for example, an important criterion for the accurate specification of the rolling force. This applies to both hot rolling and cold rolling.

[0006] Neither the temperature of the roll being processed nor its erosion or wear can be measured directly during rolling. For this reason, a roll model is used, and by utilizing the roll model, it is possible to use the operating parameters of the roll stand, which can be measured in other ways and are known, and with the help of the model, identify the temperature of the roll being processed and the wear of the roll being processed. A similar approach to the procedure may be adopted for other pairs of rolls in the roll stand, for example, for the backup rolls of a four-high stand or for the intermediate rolls of a six-high stand that are arranged between the backup rolls and the roll being processed.

[0007] The models used for modeling the roll and the rolling gap are prone to errors. Therefore, the aim of those skilled in the art is to optimize the model. This also applies, in particular, to the roll model.

[0008] Patent Document 1 discloses a method capable of identifying both the temperature of the roll and the wear of the roll in the case of the rolls of a roll stand. The identification is performed by determining the location when viewed in the direction of the roll axis.

[0009] Patent Documents 2 and 3 disclose procedures that enable the replacement of the roll being processed in a roll stand while a flat rolling stock is passing through the roll stand.

Prior Art Documents

Patent Documents

[0010]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0011] The object of the present invention is to provide the feasibility of optimizing in a simple and reliable form a roll model that can identify the temperature and wear of a roll, and thus its diameter, from the determination of the location when viewed in the direction of the roll axis.

Means for Solving the Problems

[0012] This object is achieved by using a storage device having the features of claim 1. Advantageous improvements to the storage device form the subject matter of dependent claims 2 to 8.

[0013] According to the present invention, a storage device of the type described at the beginning has at least one measurement system, which is used to individually and independently of each other detect the temperature and / or diameter of the roll at at least a predefined detection position when viewed in the direction of the roll axis.

[0014] This makes it possible to detect the actual temperature and / or actual diameter of the roll by measurement, and thus to compare them with the corresponding values determined with the aid of the model, and also to adapt the roll model based on this comparison.

[0015] As already mentioned, as a mere exception, it is also possible to make the storage device a component of a roll stand. However, this configuration is generally only suitable in specific embodiments. Generally, however, the storage device is designed as a roll-changing carriage. In such a case, in particular, it is possible to ensure in a simple form that the measurement system is not exposed to the rough operation of a roll stand such as occurs when rolling flat rolling stock.

[0016] For each roll, the measurement system has a plurality of measurement devices that are fixed in location relative to the main body of the storage device, thereby enabling the use of the measurement devices to detect the temperature and / or diameter of each roll at one of the detection positions predefined in each case as viewed in the direction of the roll axis. In the case of such an embodiment, the measurement devices capable of detecting the temperature and / or diameter of each roll at their respective positions can be provided, for example, every 10 cm or every 20 cm as viewed in the direction of the roll axis.

[0017] As an alternative, for each roll, the measurement system has a plurality of measurement devices that are movable in the direction of the roll axis relative to the main body of the storage device, thereby enabling the use of the measurement devices to detect the temperature and / or diameter of each roll within each subsection that includes at least one of the detection positions predefined in each case as viewed in the direction of the roll axis. For example, the measurement devices can be movable 5 cm, 8 cm, 12 cm, or 15 cm to the left and right from the central position of each measurement device as viewed in the direction of the roll axis in each case. In this case, the temperature and / or diameter of each roll can be detected within respective sub-regions of 10 cm, 16 cm, 24 cm, or 30 cm using one of the measurement devices in each case. As before, the numerical values mentioned are merely illustrative. Depending on the size of the sub-regions and the shift between them, for example, 10 cm or 20 cm, the sub-regions may overlap each other or may be separated from each other.

[0018] As another alternative, for each roll, the measurement system has a single measurement device, which can be used to detect the temperature and / or diameter of each roll at at least all of the predefined detection positions as viewed in the direction of the roll axis. This embodiment has the advantage of requiring a minimum number of measurement devices.

[0019] In the latter case, two alternative embodiments are also possible here.

[0020] On the one hand, the measuring device is arranged on the body of the storage device in such a way that it is movable when viewed in the direction of the roll axis, thereby enabling the measuring device to be moved over the entire effective barrel length of the roll. In this case, the roll is first placed on the body of the storage device. The measuring device is then moved along the roll. Such movement may be repeatedly interrupted for individual measurement processes, and the temperature and / or diameter of the roll are detected during this movement.

[0021] On the other hand, the measuring device can also be arranged at a fixed location on the body of the storage device in such a way that each roll is moved past the measuring device during its transfer from the roll stand to the roll-changing carriage or vice versa. This embodiment is particularly simple because it does not require any additional moving parts other than those that are necessary in any case for moving the roll from the roll stand to the roll-changing carriage or vice versa. More specifically, this embodiment can be implemented not only on the roll-changing carriage but also on the roll stand itself. In detail, in this case, it is possible to arrange the measuring device within the protected area of the operator-side stand housing.

[0022] It is possible to manually send the detected measured values to the automation unit that controls the roll stand. However, preferably, there is a data link between the measurement system and the automation unit, and the measurement system automatically transfers the detected temperature and / or diameter to the automation unit, thereby enabling the automation unit to associate the detected temperature and / or diameter with a predefined detection position. For this purpose, in addition to the temperature and / or diameter, it may also be necessary to transfer the detection position to the automation unit.

[0023] This object is further achieved by using an operating method for a roll stand having the features of claim 9. According to the invention, an operating method of the type described at the beginning is - using a measuring system arranged on the roll stand or on the roll changing carriage, during the removal of the roll from the roll stand and the transfer of the roll to the roll changing carriage, or immediately thereafter, at least at a predefined detection position when viewed in the direction of the roll axis, the temperature and / or diameter of two rolls are detected in an automated manner, - the detected temperature and / or diameter are automatically transferred to an automation unit, which thereby enables the automation unit to associate the detected temperature and / or diameter with a predefined detection position, - the automation unit is embodied in such a way that it compares the temperature of the roll specified using the roll model with the temperature of the roll specified using the measuring system and / or compares the diameter of the roll specified using the roll model with the diameter of the roll specified using the measuring system, and uses this comparison to adapt the roll model.

[0024] The above-mentioned properties, features and advantages of the invention, and the manner in which they are achieved, will become more clearly and distinctly understandable in conjunction with the following description of exemplary embodiments, which will be explained in more detail in combination with the drawings.

Brief Description of the Drawings

[0025]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

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Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Embodiments for Carrying Out the Invention

[0026] According to FIG. 1, a flat rolled stock 1 made of metal passes through a roll stand 2 of a roll train and is rolled during the process. The rolling is carried out between two rolls 3 of the same type within each respective roll stand 2. The flat rolled stock 1 can be a strip or a plate. The metal constituting the flat rolled stock 1 can be, for example, steel or aluminum. In principle, the flat rolled stock 1 can be hot rolled. However, the present invention can be used advantageously especially when the rolling is cold rolling. The two rolls 3 of the same type are generally the two working rolls within each respective roll stand 2, that is, the rolls that act directly and immediately on the flat rolled stock 1. Alternatively, they may be rolls that act directly or indirectly on the working rolls, for example, support rolls in the case of a 4-high stand or a 6-high stand, or intermediate rolls arranged between the support rolls and the working rolls in the case of a 6-high stand. In each case, the rolls 3 are of the same functional type and are of the same type in the sense that one of the two rolls 3 acts on the rolled stock 1 from above and the other acts from below.

[0027] The roll train is controlled by the automation unit 4. Specifically, the automation unit 4 thereby also controls the roll stand 2. One control of the roll stand 2 by the automation unit 4 will be explained in more detail below as a representative example of all roll stands 2 in combination with FIG. 2. First, it should be noted that this type of control is itself widely known to those skilled in the art. Details of a particular implementation form are not required as a result.

[0028] According to FIG. 2, the automation unit 4 implements a roll model 5. The automation unit 4 sends the operating data BD of the roll stand 2 to the roll model 5. Generally, the operating data BD includes the actual characteristics of the flat rolling stock 1, such as its width, its thickness, its chemical composition, and its temperature, when the flat rolling stock 1 advances into the roll stand 2. Generally, the operating data BD further includes the setpoint characteristics of the flat rolling stock 1, such as the associated outer shape, the associated profile and / or its thickness combined with the associated flatness, when the flat rolling stock 1 exits and advances from the roll stand 2. The automation unit 4 further sets control data SD for the roll stand 2, even if only temporarily. The control data SD is also sent to the roll model 5. The control data SD can include, for example, settings, rolling forces, bending forces and other factors. Using the roll model 5, the control device determines the temperature T of each of the two rolls 3 of the same type and / or the diameter D of each of the two rolls 3. Furthermore, the control device also determines the characteristics of the resulting rolling gap when the flat rolling stock 1 exits and advances from the roll stand 2, and based on the latter, determines the predicted actual characteristics of the flat rolling stock 1. In all cases, the determination is made at a location when viewed in the direction of the roll axis. Thus, it is made at least at a predefined specific position p. However, the 20 cm interval pointed out in FIG. 2 between adjacent specific positions p should be understood as merely illustrative.

[0029] Subsequently, the automation unit 4 compares the predicted actual characteristics of the flat rolling stock 1 as it exits the rolling stand 2, which are determined using the roll model 5, with the desired setpoint characteristics of the flat rolling stock 1 as it exits the rolling stand 2. As far as necessary, the automation unit 4 changes the control data SD in order to bring the predicted actual characteristics of the flat rolling stock 1 as it exits the rolling stand 2 as close as possible to the desired setpoint characteristics of the flat rolling stock 1 as it exits the rolling stand 2. As far as necessary, this involves an iterative procedure. The change in the control data SD is shown in FIG. 2 by the fact that the operating data BD is sent by the automation unit 4 only to the roll model 5, while the control data SD can be sent in both directions.

[0030] As already mentioned, the procedure described is already widely known to those skilled in the art and is well known as such. It is repeatedly carried out during the rolling of the flat rolling stock 1, for example for a new section of the flat rolling stock 1 or for the subsequent flat rolling stock 1. As a result, the automation unit 4 thereby repeatedly determines the temperature T and / or the diameter D of the roll 3 and, based thereon (among other factors, and from the determination of the location when viewed in the direction of the roll axis), determines the activation SD of each function of the rolling stand 2, i.e. the control data SD. The determination of the diameter D includes both the expansion of the roll 3 induced by the temperature and the changes associated with the wear of the diameter D. The corresponding model is known to those skilled in the art by the term TWC (thermal wear crown). As part of the modeling, the temperature of the flat rolling stock 1 is also often determined. This is also widely known to those skilled in the art and is well known.

[0031] After rolling a specific number of flat rolling stocks 1, for example, after rolling 20 or 25 flat rolling stocks 1, it is necessary to replace the roll 3. For this purpose, according to the illustration in FIG. 3, the roll changing carriage 6 is positioned next to the roll stand 2 where the roll 3 is to be replaced. Specifically, the roll stand 2 has an operator-side stand housing 2' and a drive-side stand housing 2''. The roll changing carriage 6 is arranged next to the operator-side stand housing 2'. The roll 3 is then removed from the roll stand 2 and transferred to the roll changing carriage 6 as shown by the corresponding arrow in FIG. 3. The removed roll 3 is shown by a dotted line in FIG. 3.

[0032] Generally, an interruption of rolling in which the flat rolling stock 1 is not rolled within the roll train is incorporated into this process. FIG. 4 shows the state of the corresponding roll train. However, there are also known procedures that allow the roll 3 to be replaced while the flat rolling stock 1 is passing through the roll stand 2. In the context of the present invention, which procedure is adopted is not a very important matter.

[0033] The removal of the roll 3 and the transfer of the roll 3 to the roll changing carriage 6 can be carried out in a conventionally widely known manner. However, it is important that the temperatures T and / or diameters D of the two rolls 3 are detected while the roll 3 is being removed from the roll stand 2, while the roll 3 is being transferred to the roll changing carriage 6, or immediately after said procedure. Thus, the detection is carried out before the roll changing carriage 6 is moved away from the roll stand 2.

[0034] The detection is carried out automatically using a measuring system 7, which is arranged on the roll stand 2 or on the roll changing carriage 6. Furthermore, the detection is carried out by determining the location when viewed in the direction of the roll axis, that is, at least at a predefined detection position p'. The directly adjacent detection positions p' can have a spacing of, for example, 8 cm, 10 cm, 12 cm, 15 cm or 20 cm from each other.

[0035] Furthermore, the temperature T and / or the diameter D can be detected individually and independently of each other using the measurement system 7. Thus, it is not possible or not easily possible to derive conclusions about the temperature T for another detection position p´ from the temperature T detected for a specific detection position p´. The same situation applies to the detected diameter D. Possible implementations of this procedure are described below.

[0036] The detected temperature T and / or the diameter D are automatically transferred from the measurement system 7 to the automation unit 4. For this purpose, the measurement system 7 has a data link to the automation unit 4. Wired transfer or wireless transfer are possible options here. To implement wireless transfer, the measurement system 7 and the automation unit 4 can implement a wireless link via an antenna 8, for example, according to the illustration in FIG. 5.

[0037] The detected temperature T and / or the diameter D are transferred such that the automation unit 4 associates the detected temperature T and / or the diameter D with a predefined detection position p´. For example, the detection position p´ may be transferred simultaneously. The automation unit 4 can also know in advance at which detection position p´ the temperature T and / or the diameter D are detected and in which order the temperature T and / or the diameter D are transferred from the measurement system 7 to the automation unit 4.

[0038] In step S1 according to FIG. 6, the automation unit 4 receives the transferred temperature T and / or diameter D. In step S2, the automation unit 4 performs coordinate matching. Using the temperature T and / or diameter D detected with respect to the detection position p´, the corresponding temperature T and / or diameter D with respect to the specific position p can be determined, for example, by linear interpolation or by any other type of interpolation method. As an alternative, in step S2, the temperature T and / or diameter D specified with the help of the model with respect to the specific position p can be converted to the detection position p´ by linear interpolation or by any other type of interpolation method. If the detection position p´ and the specific position p directly correspond to each other, step S2 can be omitted.

[0039] In step S3, the automation unit 4 compares the temperature T of roll 3 and / or the corresponding diameter D specified using the roll model 5 with the temperature T of roll 3 and / or the diameter D detected using the measurement system 7. Specifically, in step S3, the automation unit 4 can specify a first correction value δk1 for the first model parameter k1 of the roll model 5 based on the comparison of the temperature T, and a second correction value δk2 for the second model parameter k2 of the roll model 5 based on the comparison of the diameter D. Using the specified correction values δk1, δk2, the automation unit 4 can then correct the model parameters k1, k2 in step S4, thereby adapting the roll model 5. Naturally, the model parameters k1, k2 are part of the determination of the temperature T and / or diameter D of roll 3, which is carried out using the roll model 5.

[0040] Next, possible embodiments in which the detection of the temperature T and / or diameter D can be performed will be described below in combination with FIGS. 7 to 11.

[0041] In all embodiments, there is a storage device for the two rolls 3. In most embodiments, the storage device is designed as a roll-changing cart 6 according to the illustrations in FIGS. 7 to 10. In such cases, the storage device (i.e., the roll-changing cart 6) can be positioned relative to the roll stand 2 in such a way that the roll 3 can be moved from the roll stand 2 to the storage device or vice versa. However, in individual cases, the storage device may be an integral part of the roll stand 2 itself, as illustrated in FIG. 11.

[0042] Thus, for example, according to the illustration in FIG. 7, the measuring system 7 can have a plurality of measuring devices 9 for each roll 3. In the embodiment according to FIG. 7, the measuring devices 9 are arranged at fixed locations relative to the body 10 of the roll-changing cart 6. Using the measuring devices 9, in each case the temperature T and / or the diameter D of each roll 3 are detected at one of the predefined detection positions p´ when viewed in the direction of the roll axis. In the context of the embodiment according to FIG. 7, the roll 3 is thus first removed from the roll stand 2 and transferred to the roll-changing cart 6. Thereafter, each measuring device 9 detects the temperature T and / or the diameter D of the associated roll 3 for its respective detection position p´. The detection of the temperature T can be achieved either by contact or non-contact. The detection of the temperature T by contact can be achieved, for example, using a sensing probe. For this purpose, the sensing probe can implement, for example, a PT100 element. It is also possible to use the same sensing probe or some other sensing probe to detect the diameter D by contact, if applicable. For detecting the diameter D, the corresponding sensing probe may, for example, be designed similar to a micrometer screw. As an alternative, the non-contact detection of the temperature T can be performed, for example, using an infrared camera. Similarly, it is possible to perform the non-contact detection of the diameter D using, for example, laser distance measurement or ultrasonic distance measurement.

[0043] FIG. 8 shows an embodiment similar to that of FIG. 7. Also in the case of the embodiment shown in FIG. 8, the measuring system 7 has a plurality of measuring devices 9 for each roll 3. However, in contrast to the embodiment of FIG. 7, the measuring devices 9 in the embodiment according to FIG. 8 are arranged so as to be movable individually or together in the direction of the roll axis with respect to the body 10. The movability is indicated by the corresponding double-headed arrows in FIG. 8. Using the measuring device 9, in each case, the temperature T and / or the diameter D of each roll 3 can be detected in each sub-section including at least one of the predefined detection positions p' when viewed in the direction of the roll axis. In other respects, the expressions related to FIG. 7 continue to apply.

[0044] In the cases of the embodiments shown in FIGS. 7 and 8, the measuring system 7 has a plurality of measuring devices 9 for each roll 3 in each case. However, it is also possible for the measuring system 7 to have only a single measuring device 9 for each roll 3. In such a case, it is necessary to be able to detect the temperature T and / or the diameter D of each roll 3 using the individual measuring device 9 at all of at least the predefined detection positions p' when viewed in the direction of the roll axis.

[0045] To enable such detection, for example, the embodiment of FIG. 9 can be adopted. FIG. 9 is basically the embodiment of FIG. 8. The difference is that, in contrast to the embodiment of FIG. 8, there is only a single measuring device 9 for each roll 3, but in compensation, the region in which this measuring device 9 can be moved when viewed in the direction of the roll axis is correspondingly large, so that the measuring device 9 can be moved over at least the entire effective barrel length of the roll 3. In FIG. 9, as in FIG. 8, the movability is indicated by the corresponding double-headed arrows.

[0046] As a result, for each roll 3, the only significant factor for data acquisition at all of the predefined detection positions p´ using a single measuring device 9 is the relative movement of the measuring device 9 with respect to the roll 3. Therefore, whether the roll 3 is stationary within the body 10 of the roll-changing carriage 6 and the measuring device 9 is moved, or conversely the measuring device 9 is stationary and the roll 3 is moved, is not important during data acquisition. Therefore, according to the illustration of FIG. 10, by kinematically inverting the procedure of FIG. 9, it is possible to arrange the measuring device 9 at a fixed location on the body 10 of the roll-changing carriage 6.

[0047] In such a case, the measuring device 9 only needs to be arranged in such a way that each roll 3 is moved so as to pass through the measuring device 9 during transfer from the roll stand 2 to the roll-changing carriage 6 or vice versa. This can be easily implemented.

[0048] Precisely, this embodiment, i.e., the embodiment in which the measuring device 9 is arranged at a fixed location and each roll 3 is moved past the measuring device 9 during transfer from the roll stand 2 to the roll-changing carriage 6 or vice versa, can also be implemented in such a way that, according to the illustration of FIG. 11, the measuring device 9 is not arranged at a fixed location on the roll-changing carriage 6, but rather on the roll stand 2 itself, specifically on the operator-side stand housing 2´. In such a case, the storage device is thus a component of the roll stand 2.

[0049] The present invention has many advantages. Specifically, continuous correction of the model parameters k1, k2 of the roll model 5 is possible in a simple and reliable manner. The improved modeling also makes it possible to improve the quality in the rolling of the rolling stock 1. Specifically, the quality of the thickness, flatness, and profile can be enhanced. The modeling of the temperature of the rolling stock 1 can also be improved. Furthermore, improved prediction in the rolling of new materials is possible.

[0050] The present invention has been illustrated and described more specifically by using preferred exemplary embodiments. However, the present invention is not limited by the disclosed embodiments, and other variations can be derived therefrom by those skilled in the art without exceeding the scope of protection of the present invention.

Explanation of Reference Numerals

[0051] 1 ··· Rolling stock 2 ··· Rolling stand 2´, 2´´ ··· Stand housing 3 ··· Roll 4 ··· Automation unit 5 ··· Roll model 6 ··· Roll changing carriage 7 ··· Measuring system 8 ··· Antenna 9 ··· Measuring device 10 ··· Main body BD ··· Operating data D ··· Diameter k1, k2 ··· Model parameters p ··· Specific position p´ ··· Detection position S1 to S4 ··· Steps SD ··· Control data T ··· Temperature δk1, δk2 ··· Correction values

Claims

1. A storage device for two rolls (3) of the same type within a roll stand (2), said storage device being a component of said roll stand (2) or being positionable relative to said roll stand (2) in such a way that said roll (3) can be moved from said roll stand (2) to said storage device and vice versa, said storage device having at least one measuring system (7), and using said measuring system (7) to individually and independently of one another detect the temperature (T) and / or diameter (D) of said roll (3) at least at a predefined detection position (p') when viewed in the direction of the roll axis, for each roll (3), said measuring system (7) having a single measuring device (9), and using said measuring device (9) to detect the temperature (T) and / or diameter (D) of each respective roll (3) at least at all of said predefined detection positions (p') when viewed in the direction of the roll axis, said measuring device (9) being arranged at a fixed location on the body (10) of said storage device in such a way that each respective roll (3) is moved past said measuring device (9) during transfer from said roll stand (2) into a roll-changing carriage (6) and vice versa, characterized storage device.

2. The storage device according to claim 1, characterized in that said storage device is designed as a roll-changing carriage (6).

3. There being a data link between said measuring system (7) and an automation unit (4) that controls said roll stand (2), and said measuring system (7) automatically transferring the detected temperature (T) and / or diameter (D) to said automation unit (4), thereby enabling said automation unit (4) to associate the detected temperature (T) and / or diameter (D) with said predefined detection position (p'), characterized storage device according to claim 1 or 2.

4. A method of operating a roll stand (2), - a flat rolling stock (1) passing through said roll stand (2) is rolled between two rolls (3) of the same type within said roll stand (2), - The automation unit (4) for controlling the roll stand (2) utilizes a roll model (5) that uses the operating data (BD) of the roll stand (2) for the same type of roll (3) to repeatedly identify the temperature (T) and / or diameter (D) of the roll (3) at least at a predefined specific position (p) when viewed in the direction of the roll axis. Based on the identified temperature (T) and / or diameter (D), the activation (SD) of the function of the roll stand (2) is determined. As a result, the rolling gap of the roll stand (2) is set during the rolling of the flat rolling stock (1) as closely as possible according to the setpoint input. - An operating method of the roll stand (2), wherein the same type of roll (3) is occasionally removed from the roll stand (2) and transferred into a roll changing carriage (6). - Using a measuring system (7) arranged on the roll changing carriage (6) according to claim 2, during the removal of the roll (3) from the roll stand (2) and the transfer of the roll (3) into the roll changing carriage (6) or immediately thereafter, when viewed in the direction of the roll axis, the temperature (T) and / or diameter (D) of the two rolls (3) are automatically detected at least at a predefined detection position (p'). - The detected temperature (T) and / or diameter (D) are automatically transferred to the automation unit (4), thereby enabling the automation unit (4) to associate the detected temperature (T) and / or diameter (D) with a predefined detection position (p'). - The automation unit (4) compares the temperature (T) of the roll (3) identified using the roll model (5) with the temperature (T) of the roll (3) identified using the measuring system (7) and / or compares the diameter (D) of the roll (3) identified using the roll model (5) with the diameter (D) of the roll (3) identified using the measuring system (7), and uses this comparison to adapt the roll model (5). An operating method of the roll stand (2) is characterized by this.

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