RU2773041C1 - Improved adaptation of the rolling model - Google Patents

Abstract

FIELD: rolling.

SUBSTANCE: invention relates to an apparatus for laying two similar rolls in a rolling cage. Apparatus for laying is an integral part of the rolling mill stand or can be placed relative to the rolling mill stand so that the rolls can be transferred from the rolling mill stand to the apparatus for laying or vice versa. The apparatus for laying has at least one measuring system used to record the temperatures and/or diameters of the rolls in the direction of the axes of the rolls, at least in predetermined recording positions, separately and independently.

EFFECT: temperatures of the rolls, wear and diameter thereof are determined as a result with local allowance.

9 cl, 11 dwg

Description

Technical field

The present invention relates to a device for stacking two rolls of the same type in a rolling stand, this stacking device being an integral part of the rolling stand or being positioned relative to the rolling stand in such a way that the rolls can be transferred from the rolling stand to the stacking device or vice versa.

The present invention also relates to a method for operating a rolling stand,

- while passing through the rolling stand flat rolling is rolled between two rolls of the same type rolling stand;

- in this case, the automation unit controlling the rolling stand, by means of a rolling model based on the operating data of the rolling stand, again and again determines for two rolls of the same type, when viewed in the direction of the axes of the rolls, at least in predetermined determination positions, the temperatures and/or diameters of the rolls and, based on on the found temperatures and/or diameters, determines the setting of the rolling stand, so that the roll gap of the rolling stand is adjusted during the rolling of flat products, if possible, according to the given settings;

- at the same time, rolls of the same type are dismantled from the rolling stand from time to time and transferred to the transfer trolley.

When rolling metal flat products, the roll gap is usually calculated as part of the so-called 2nd level automation. To calculate the roll gap, complex simulations are used that take into account, for example, roll setting, roll bending, roll flattening, roll barreling, roll wear, roll temperature, roll temperature, and much more. The named values are partly given in the form of a corresponding characteristic for the width of the swath barrel. Thus, for example, a roll locally (the term "locally" refers to a location as viewed in the direction of the axis of the roll) is thicker the higher the temperature of the roll at that location. On the contrary, the roller is locally thinner, the higher the wear or abrasion of the roller in a given place.

The absolute accuracy with which the roll gap must be calculated is greater the smaller the roll gap. With a roll gap of, for example, 3 cm, an accuracy of 20 µm or 50 µm can be quite acceptable. With an inter-roll gap of, for example, 1.2 mm, on the contrary, such accuracy, according to all the rules, is already unacceptable.

The roll gap, as already mentioned, is affected, among other things, by the local temperature of the rolls. In addition, the roll gap is also affected by abrasion to which the rolls are subject during operation. In addition, the temperature of the flat steel material also depends within certain limits on the temperature, in particular of the work rolls. The temperature of the rolled product, in turn, is an important criterion, for example, for the correct determination of the rolling force. This applies to both hot rolling and cold rolling.

Both the temperature of the work rolls and the abrasion or wear cannot be directly measured during rolling. For this reason, rolling models are used, by means of which, on the basis of measurable and otherwise known operating parameters of the rolling stand, the temperature of the work rolls as well as the wear of the work rolls can be determined with model support. Similar methods can be chosen under known conditions for other pairs of rolls of the rolling stand, for example, for back-up rolls of the quarto stand or for intermediate rolls of the sixth stand located between the back-up rolls and the work rolls.

The models by which the rolls and the roll gap are modeled are flawed. Therefore, the specialist seeks to optimize these models. This also applies to the rolling model.

State of the art

A method is known from WO 2012/025 266 A1 by which both the temperature of the roll and the wear of the roll can be determined at the roll of a rolling stand. The determination is made when viewed in the direction of the axis of the roll, with local resolution.

Methods are known from WO 2017/144 227 A1 and WO 2011/124 585 A1 by which the work rolls of a rolling stand can be replaced while a flat product is being passed through the rolling stand.

The essence of the invention

The aim of the present invention is to provide possibilities whereby a rolling pattern can be optimized in a simple and reliable manner, whereby the temperatures of the rolls and their wear and thus their diameter can be determined with a local resolution when viewed in the direction of the roll axes.

The problem is solved with the help of a stacking device with the features of claim 1 of the claims. Preferred embodiments of the styling device are the subject of dependent claims 2 to 8.

According to the invention, a stacker of the aforementioned kind is designed in such a way that the stacker has at least one measuring system by means of which the temperatures and/or the diameters of the swaths, as seen in the direction of the axes of the swaths, can be recorded at least at predetermined recording positions. separately and independently of each other.

Here, actual temperatures and/or actual roll diameters can be recorded by measuring technology so that they can be compared with corresponding values determined with model support and the rolling model can be adapted based on this comparison.

As already mentioned, it is possible, even if only as an exception, for the laying device to be an integral part of the rolling stand. This implementation is expedient, as a rule, only in one special embodiment. By all rights, in contrast, the stacking device is made in the form of a transfer trolley. In this case, in particular, it can be ensured in a simple manner that the measuring system is not subjected to the rigorous use of the rolling stand, which occurs during the rolling of flat products.

It is possible for the measuring system to have, for each roll, a plurality of measuring devices that are stationary with respect to the main body of the stacker, so that by means of these measuring devices the temperature and/or diameter of each roll, as seen in the direction of the axes of the rolls, can be recorded at each of the predetermined recording positions. In such an embodiment, looking in the direction of the axes of the rolls, for example every 10 cm or every 20 cm, one measuring device can be provided, by means of which the temperature and/or the diameter of each roll can be recorded at a given location.

Alternatively, it is possible for the measuring system to have, for each swath, several measuring devices which are movable with respect to the main part of the laying device in the direction of the axes of the swaths, so that by means of these measuring devices the temperature and/or the diameter of each swath, as seen in the direction of the axes of the rolls, can register in each separate area, including in each case at least one of the predefined registration positions. For example, the measuring devices may be capable of moving from some middle position of each measuring device, as viewed in the direction of the axes of the rolls, 5 cm, 8 cm, 12 cm or 15 cm to the left and right each. In this case, the temperature and/or the diameter of each roll can be recorded by each of the measuring devices in each individual range of 10 cm, 16 cm, 24 cm or 30 cm. The stated numerical values are, as before, purely exemplary. Depending on the size of the individual bands and their offset relative to each other, for example 10 cm or 20 cm, the individual bands may overlap or be non-overlapping.

In turn, it is alternatively possible for the measuring system to have one separate measuring device for each roll, by means of which the temperatures and/or diameters of each roll, as seen in the direction of the roll axes, can be recorded at least in all of the predetermined recording positions. This embodiment has the advantage that only a minimum number of measurement devices are needed.

In the latter case, in turn, two alternative embodiments are possible.

Firstly, it is possible for the measuring device to be movably positioned on the body of the laying device, as seen in the direction of the axes of the rolls, so that the measuring device can be moved along the entire effective length of the barrel of the rolls. In this case, the windrows are first positioned in the main body of the stacker. After that, the measuring device moves along the rolls. During this, under known conditions, again and again interrupted for a single measurement process, the movement movement is recorded temperatures and/or diameters of the rolls.

Secondly, it is possible for the measuring device to be permanently positioned on the main body of the laying device in such a way that each swath, when transferred from the rolling stand to the transfer car or vice versa, moves past the measuring device. This embodiment is particularly simple, since no other moving parts are required besides those parts which, one way or another, must be available to transfer the rolls from the rolling stand to the transfer car or vice versa. In addition, this particular implementation option is implemented not only at the transfer car, but also at the rolling stand itself. In particular, the measuring device can in this case be located in the protected area of the stand of the stand on the operator's side.

It is possible that the recorded measured values are manually entered into the automation unit controlling the rolling stand. Preferably, however, the measuring system is connected via information technology to this automation unit and automatically transmits the recorded temperatures and/or diameters to the automation unit, so that the recorded temperatures and/or diameters can be assigned by the automation unit to predetermined recording positions. Under certain conditions, it may be necessary for this purpose that, in addition to the temperatures and/or diameters, the recording positions are also transmitted to the automation unit.

The problem is also solved with the help of a method for operating a rolling stand with the features of claim 9 of the claims. According to the invention, the operation method of the above type is carried out in such a way that

- that during the dismantling of the rolls from the rolling stand and the transfer of the rolls to the transfer car or at the time immediately following this, by means of a measuring system located on the rolling stand or on the transfer car, when viewed in the direction of the axes of the rolls, temperatures are automatically recorded in predetermined recording positions and/or diameters of both rolls;

- that the recorded temperatures and/or diameters are automatically transmitted to the automation unit, so that the recorded temperatures and/or diameters can be matched by the automation unit to predefined recording positions, and

- that the automation unit compares the roll temperatures determined by the rolling model and/or the roll diameters determined by the rolling model with the roll temperatures recorded by the measuring system and/or with the roll diameters recorded by the measuring system and adapts the rolling model based on this comparison.

Brief description of the drawings

The above described features, features and advantages of this invention, as well as how they are achieved, become clearer and more clearly understood in the context of the following description of exemplary embodiments, which are explained in more detail with reference to the drawings. In this case, the schematic image shows:

figure 1: multistand group of rolling stands during rolling;

figure 2: modeling the roll gap and determining the setting of the rolling stand;

figure 3: dismantling of the rolls of the rolling stand from the rolling stand;

figure 4: a group of rolling stands of figure 1 during the interval between passes;

figure 5: measuring system and automation device;

Fig. 6: block diagram;

Fig.7: one of the possible embodiments of the transshipment trolley;

Fig.8: one of the modifications of the transshipment trolley from Fig.5;

Fig.9: another modification of the transshipment trolley from Fig.5;

figure 10: another possible embodiment of the transfer cart and

Fig.11: one of the possible embodiments of the rolling stand.

Description of Embodiments

In accordance with figure 1 flat products 1 of metal passes through the rolling stands 2 groups of rolling stands and rolled. Rolling is always carried out between two similar rolls 3 of each rolling stand 2. Flat products 1 may be a strip or a thick sheet. The metal of which the flat product 1 is composed can be, for example, steel or aluminium. In principle, it is possible for flat products 1 to be hot rolled. However, the present invention is preferably applicable, in particular, when the rolling is cold rolling. Said two rollers 3 of the same type are, as a rule, the two work rolls of each rolling stand 2, i.e. those rolls that act directly and directly on the flat steel 1. Alternatively, they can be rolls that act directly or indirectly on the work rolls, for example , at the quarto stand or the sexto stand about back-up rolls or at the sexto stand about intermediate rolls located between the back-up rolls and the work rolls. In each case the rolls 3 are of the same type in the sense that they are functionally of the same type and one of the two rolls 3 acts on the rolled stock 1 from above and the other from below.

Management of a group of rolling stands is carried out using block 4 automation. In particular, the automation unit 4 also controls the rolling stands 2. The control of one of the rolling stands 2 by means of the automation unit 4 is explained in more detail below, as an example for all rolling stands 2, with reference to FIG. First, it should be pointed out that this type of control as such is well known to specialists. Therefore, specific implementation details are not necessary.

2, the automation unit 4 implements the rolling model 5. The automation unit 4 inputs the rolling stand operating data BD into the rolling model 5 . The operating data BD generally includes the actual properties of the flat product 1 as it enters the rolling stand 2, such as, for example, its width, its thickness, its chemical composition and its temperature. The operating data BD generally also includes the nominal properties of the flat product 1 as it exits the rolling stand 2, such as, for example, its thickness along with the proper profile, proper contour and/or proper flatness. The automation unit 4 also assigns, even if only initially, control data SD to the rolling stand 2. The control data SD may include, for example, setting, rolling force, bending force, and more. By means of the rolling pattern 5, the control device determines, for two rolls 3 of the same type, the temperature T of each roll 3 and/or the diameter D of each roll 3. In addition, it also determines the resulting change in the roll gap and, based on this, the expected actual properties of flat products 1 at exit from the rolling stand 2. The determination is carried out in all cases, if you look in the direction of the axes of the rolls, with local resolution. That is, it is carried out at least at predetermined positions p of the definition. However, the distance between adjacent determination positions p of 20 cm indicated in FIG. 2 is only to be understood purely as an example.

The automation unit 4 then compares the expected actual properties of the slab 1 at the exit of the rolling stand 2 determined by means of the rolling model 5 with the desired nominal properties of the slab 1 at the exit of the rolling stand 2. If necessary, the automation unit 4 then changes the control data SD, in order to approximate, as far as possible, the expected actual properties of flat products 1 when leaving the rolling stand 2 to the desired nominal properties of flat products when leaving the rolling stand 2. If necessary, an iterative method is carried out. The change in the control data SD is indicated in FIG. 2 in such a way that the operation data BD is exclusively input into the rolling pattern 5 by the automation unit 4, while the control data SD can be transmitted in two directions.

The method explained, as already mentioned, is well known and familiar to those skilled in the art as such. It is carried out again and again during the rolling of flat products 1, for example, for a new section of flat products 1 or for subsequent flat products 1. That is, as a result, the automation unit 4 determines (also, when viewed in the direction of the axes of the rolls, with local resolution) of the temperature T and/or the diameters D of the rolls 3 and, based on this, the corresponding setting SD of the rolling stand 2, i.e. the control data SD. Both the temperature-induced expansion of the rolls 3 and their wear-induced change in diameter D are included in the definition of the diameters D. The corresponding models are known to those skilled in the art under the term TWC (thermal wear crown). Often, within the framework of the simulation, the temperature of flat products 1 is also determined. And this is well known and familiar to specialists.

After a certain number of slabs 1 have been rolled, for example after 20 or 25 slabs 1 have been rolled, the rolls 3 must be replaced. For this purpose, and according to the representation in FIG. The transshipment cart 6 is located next to the stand 2' of the stand on the operator's side.

Then the rolls 3 are dismantled from the rolling stand 2 and, as indicated in Fig. 3 by the corresponding arrows, are transferred to the transfer car 6. The dismantled rolls 3 are shown in the drawing of Fig. 3 by a dashed line.

As a rule, for this process, an interval between passes is set, during which flat steel 1 is not rolled in a group of rolling stands. Figure 4 shows the corresponding state of a group of rolling stands. However, methods are also known in which a change of rolls 3 can take place while a flat product 1 passes through the rolling stand 2. The choice of one method or the other is of secondary importance in the context of the present invention.

The dismantling of the rolls 3 and the transfer of the rolls 3 to the transfer trolley 6 can be carried out in a conventional, well-known manner. However, it is important that during the dismantling of the rolls 3 from the rolling stand 2 and the transfer of the rolls 3 to the transfer car 6 or at the time immediately following this, the temperatures T and/or the diameters D of the two rolls 3 are recorded. the transshipment trolley 6 moves away from the rolling stand 2.

Registration is carried out automatically by means of a measuring system 7, which is located on the rolling stand 2 or on the transfer car 6. In addition, registration is carried out, looking in the direction of the axes of the rolls, with local resolution, namely, at least at predetermined registration positions p'. Immediately adjacent detection positions p' may, for example, be 8 cm, 10 cm, 12 cm, 15 cm or 20 cm apart.

In addition, the temperatures T and/or the diameters D are recorded by means of the measuring system 7 separately and independently of each other. That is, on the basis of the temperature T recorded for a certain recording position p', judgments about the temperature T for another recording position p' cannot be immediately derived, or at least not immediately. A similar state of affairs takes place for the recorded diameters D. Possible implementations of these methods will be further explained later.

The recorded temperatures T and/or diameters D are automatically transmitted by the measuring system 7 to the automation unit 4 . The measuring system 7 is connected for this purpose to the automation unit 4 with the possibility of data transfer. Alternatively, wired transmission or wireless transmission is possible. For the implementation of wireless transmission, the measuring system 7 and the automation unit 4 can, for example, according to the representation in FIG. 5, implement a radio link by means of antennas 8 .

The transmission of the recorded temperatures T and/or diameters D is carried out in such a way that the automation unit 4 is able to assign the recorded temperatures T and/or diameters D to predetermined recording positions p'. For example, registration positions p' may be transmitted simultaneously. It is also possible for the automation unit 4 to know in advance in which recording positions p' the temperatures T and/or diameters D are recorded and in what sequence the recorded temperatures T and/or diameters D are transmitted by the measuring system to the automation unit 4.

The automation unit 4 receives the transmitted temperatures T and/or diameters D in step S1. In step S2, the automation unit 4 performs coordinate adaptation. For example, based on the recorded temperatures T and/or diameters D for the recording positions p', the corresponding temperatures T and/or diameters D for the detection positions p can be determined by linear or other interpolation. Alternatively, in step S2, the temperature determinations T and/or the diameters D determined with the model support for the positions p can be recalculated by linear or other interpolation to the registration positions p'. If the registration positions p' and the determination positions p directly correspond to each other, step S2 may be omitted.

In step S3, the automation unit 4 compares the temperatures T and/or the respective diameters D of the rolls 3 determined by the rolling model 5 with the temperatures T and/or the diameters D of the rolls 3 recorded by the measuring system 7. In particular, the automation unit 4 can, in step S3, on the basis of temperature comparison T determine the first change factor δk1 for the first parameter k1 of the rolling pattern 5, and based on the comparison of the diameters D, the second change factor δk2 for the second parameter k2 of the rolling pattern 5. Then, on the basis of the determined change factors δk1, δk2, the automation unit 4 can adjust the model parameters k1, k2 in step S4 and thereby adapt the rolling model 5 . The model parameters k1, k2 are, of course, included in the determination of the temperatures T and/or the diameters D of the rolls 3, which is carried out by means of the rolling model 5 .

Below, now with reference to Figs. 7-11, possible embodiments are explained, according to which temperatures T and/or diameters D can be recorded.

In all embodiments, there is a stacking device for two rolls 3. In most embodiments, the stacking device is made according to the images in Figs. with respect to the rolling stand 2 in such a way that the rolls 3 can be transferred from the rolling stand 2 to the stacker or vice versa. However, in some cases, the stacking device, according to the image in Fig. 11, can also be an integral part of the rolling stand 2 itself.

So, for example, according to the image in Fig.7, it is possible that the measuring system 7 has several measuring devices 9 for each roll 2. The measuring devices 9 in the embodiment in accordance with Fig.7 are located stationary relative to the main part 10 of the transfer car 6. By means of measuring devices 9 registers the temperature T and/or the diameter D of each roll 3, as viewed in the direction of the axes of the rolls, at each of the predetermined recording positions p'. That is, within the framework of the embodiment according to FIG. 7, the rolls 3 are first dismantled from the rolling stand 2 and transferred to the transfer car 6. After that, each measuring device 6 (9?) for its respective recording position p' registers the temperature T and/or the diameter D of said roll 3. The temperature T can be detected alternatively by contact or non-contact. Contact registration of temperature T can be carried out, for example, using a measuring probe. The measuring probe for this purpose can be, for example, a PT100 element. Using the same or a different measuring probe, the contact measurement of the diameter D can also be carried out under certain conditions. Alternatively, for example, by means of an infrared camera, a non-contact recording of the temperature T can be carried out. Also, for example, by means of a laser-based distance measurement or an ultrasound-based distance measurement, a non-contact recording of the diameter D can be carried out.

Fig. 8 shows an embodiment similar to Fig. 7. And in the embodiment according to FIG. 8, the measuring system 7 has several measuring devices 9 for each roller 2. However, in contrast to the embodiment of FIG. 7, the measuring devices 9 in the embodiment according to FIG. the main body 10 in the direction of the axes of the rolls. This mobility is indicated in Fig. 8 by the respective double arrows. As a result, the temperature T and/or the diameter D of each roll 3, viewed in the direction of the roll axes, can be recorded by means of the measuring devices 9 in a separate area, which in each case includes at least one of the predetermined recording positions p'. Otherwise, the reasoning to Fig.7 is also valid.

In the embodiments according to figures 7 and 8, the measuring system 7 has several measuring devices 9 for each roll 3. However, it is also possible for the measuring system 7 to have one separate measuring device 9 for each roll 3. In this case, by means of a separate device 9 can be recorded temperatures T and/or diameters D of each roll 3, when viewed in the direction of the axes of the rolls, at least in all of the predetermined recording positions p'.

To enable such registration, the embodiment of FIG. 9 may, for example, be selected. Fig.9 is essentially one of the embodiments of Fig.8. The difference lies in the fact that, in contrast to the embodiment of Fig. 8, there is only one single measuring device 9 for each roll 3, but the area over which this measuring device 9 can move, when viewed in the direction of the axes of the rolls, is correspondingly large, so that the measuring device 9 can be moved over at least the entire effective length of the barrel of the rolls 3. The mobility is indicated in Fig. 9, similarly to Fig. 8, by the corresponding double arrows.

As a result, to record data at all predetermined recording positions p' by means of a single measuring device 9 for each roller 3, only the relative movement of the measuring device 9 relative to the roller 3 is important. transfer car 6 and the measuring device 9 is moving, or, conversely, the measuring device 9 is stationary and the roll 3 is moving. Therefore, according to the image in Fig.10, kinematically opposite to the method of Fig.9, it is possible to permanently position the measuring device 9 on the main part 10 of the transfer car 6. The measuring device 9 should in this case be located only in such a way that each roll 3, when transferred from rolling stand 2 into the transfer truck 6 or vice versa moved past the measuring device 9. This is easily implemented.

Precisely this embodiment, i.e. the embodiment in which the measuring device 9 is stationary and each roll 3 moves past the measuring device 9 when being transferred from the rolling stand 2 to the transfer car 6 or vice versa, is also realized in such a way that the measuring device 9 is located not permanently on the transfer car 6, but, according to the representation of FIG. 11, on the rolling stand 2 itself, in particular on the stand 2' of the stand on the operator's side. That is, in this case, the laying device is an integral part of the rolling stand 2.

The present invention has many advantages. In particular, permanent adjustment of the parameters k1, k2 of the roll pattern 5 is possible in a simple and reliable manner. Due to improved modeling, the rolling quality of the rolled stock 1 can also be improved. In particular, the quality of thickness, flatness and contour can be improved. The simulation of the temperature of the rolled 1 can also be improved. In addition, improved prediction is possible when rolling new materials.

Although the invention has been illustrated and described in detail with reference to the preferred embodiment, the invention is not limited to the disclosed examples, and other variations may be deduced from the skilled person without departing from the scope of the invention.

LIST OF REFERENCES

1 rental

2 rolling stand

2', 2'' Cage stand

3 rolls

4 Automation unit

5 Rolling model

6 Transfer trolley

7 Measuring system

8 Antennas

9 Measuring devices

10 Main body

BD Operating data

D Diameters

k1, k2 Model parameters

p Definition provisions

p' Registration provisions

S1-S4 Steps

SD Control data

T Temperature

δk1, δk2 Coefficients of change

Claims (32)

1. A device for stacking two rolls of the same type (3) in a rolling stand (2), moreover, this stacking device is an integral part of the rolling stand (2) or is configured to be placed relative to the rolling stand (2) in such a way that the rolls (3) made with the possibility of transferring from the rolling stand (2) to the stacking device or vice versa, different in that that the stacking device has at least one measuring system (7) by means of which the temperatures (T) and/or diameters (D) of the rolls, when viewed in the direction of the axes of the rolls, at least in predetermined recording positions (p') can register separately and independently of each other. 2. The device according to claim 1, different in that that the stacking device is made in the form of a transshipment trolley (6). 3. The device according to claim 2, different in that that the measuring system (7) has for each roll (3) several measuring devices (9) that are stationary with respect to the main body (10) of the stacking device, so that by means of these measuring devices (9) the temperature (T) and/or diameter (D) of each roll (3), when viewed in the direction of the axes of the rolls, can be registered in each of the predetermined positions (p') registration. 4. The device according to claim 2, different in that that the measuring system (7) has for each roll (3) several measuring devices (9) movable relative to the main part (10) of the laying device in the direction of the axes of the rolls, and by means of these measuring devices (9) the temperature (T) and/or the diameter (D) of each roll (3), as seen in the direction of the axes of the rolls, can be recorded in each individual section, including in each case at least one of the predetermined recording positions (p'). 5. The device according to claim 1 or 2, different in that that the measuring system (7) has for each roll (3) one separate measuring device (9), by means of which the temperatures (T) and/or diameters (D) of each roll (3), when viewed in the direction of the axes of the rolls, can be recorded, at least in all of the predefined registration positions (p'). 6. The device according to claim 5, different in that that the measuring device (9) is movably located on the main part (10) of the laying device, when viewed in the direction of the axes of the rolls, so that the measuring device (9) is movable along the entire effective length of the barrel of the rolls (3). 7. The device according to claim 5, different in that that the measuring device (9) is located stationary on the main part (10) of the stacking device in such a way that each roll (3) moves past the measuring device (9) when transferred from the rolling stand (2) to the transfer car (6) or vice versa. 8. The device according to one of claims 1-7, different in that that the measuring system (7) is connected with the possibility of data transmission to the control rolling stand (2) automation unit (4) and automatically transmits the recorded temperatures (T) and/or diameters (D) to the automation unit (4), so that the recorded temperatures ( T) and/or diameters (D) can be assigned by the automation unit (4) to predetermined registration positions (p'). 9. The method of rolling flat products in a rolling stand using the device according to claim 2, - while passing through the rolling stand (2) flat products (1) are rolled between two rolls of the same type (3) of the rolling stand (2); - at the same time, the automation unit (4) controlling the rolling stand (2) determines, by means of the rolling model (5) based on the operating data (BD) of the rolling stand (2), for two rolls of the same type (3), when viewed in the direction of the axes of the rolls, at least at predetermined positions (p) to determine the temperature (T) and/or diameters (D) of the rolls and, based on the found temperatures (T) and/or diameters (D), determines the setting (SD) of the rolling stand (2), so that the roll gap of the rolling stand (2) is adjusted during the rolling of the flat steel (1); - at the same time, rolls of the same type (3) are dismantled from the rolling stand (2) from time to time and transferred to the transfer trolley (6), different in that - that during the dismantling of the rolls (3) from the rolling stand (3) and the transfer of the rolls (3) to the transfer car (6) or at the time immediately following this, by means of the rolling stand (2) located on the rolling stand (2) or on the transfer car (6 ) measuring system (7), when viewed in the direction of the axes of the rolls, in predetermined recording positions (p') the temperatures (T) and/or diameters (D) of both rolls (3) are automatically recorded; - the recorded temperatures (T) and/or diameters (D) are automatically transmitted to the automation unit (4), so that the recorded temperatures (T) and/or diameters (D) can be set by the automation unit (4) in accordance with predetermined positions (p' ) registration, and - the automation unit (4) compares the temperatures (T) of the rolls (3) determined by means of the rolling model (5) and/or the diameters (D) of the rolls (3) determined by means of the rolling model (5) with the temperatures recorded by means of the measuring system (7) ( T) rolls and/or with roll diameters (D) registered by means of the measuring system (7) and adapts the rolling model (5) on the basis of this comparison.

Images