EP3851217A1 - Improved roll model adaptation - Google Patents

Abstract

A storage device (6) for two similar rolls (3) of a roll stand (2) is part of the roll stand (2) or can be positioned relative to the roll stand (2) in such a way that the rolls (3) from the roll stand (2) into the storage device (6 ) or vice versa. It has at least one measuring system (7), by means of which the temperatures and / or the diameter of the rollers (3), viewed in the direction of the roller axes, can be recorded individually and independently of one another at least at predefined recording positions. After a transmission to an automation unit that controls the roll stand (2), the latter can generate a roll model, by means of which, on the basis of operating data of the roll stand (2), for the two similar rolls (3) viewed in the direction of the roll axes, at least at predefined positions, the temperatures and / or the diameter of the rollers (3) determined, adapt.

Description

Field of technology

The present invention is based on a storage device for two similar rolls of a roll stand, the storage device being part of the roll stand or being positionable relative to the roll stand in such a way that the rolls can be transferred from the roll stand to the storage device or vice versa.

• wobei ein das Walzgerüst durchlaufendes flaches Walzgut zwischen zwei gleichartigen Walzen des Walzgerüsts gewalzt wird,
• wobei eine das Walzgerüst steuernde Automatisierungseinheit mittels eines Walzenmodells anhand von Betriebsdaten des Walzgerüsts für die beiden gleichartigen Walzen in Richtung der Walzenachsen gesehen zumindest an vordefinierten Ermittlungspositionen immer wieder die Temperaturen und/oder die Durchmesser der Walzen ermittelt und aufbauend auf den ermittelten Temperaturen und/oder Durchmessern eine Ansteuerung des Walzgerüsts ermittelt, so dass ein Walzspalt des Walzgerüsts während des Walzens des flachen Walzguts nach Möglichkeit entsprechend Sollvorgaben eingestellt wird,
• wobei die gleichartigen Walzen von Zeit zu Zeit aus dem Walzgerüst ausgebaut und in einen Walzenwechselwagen überführt werden.

The present invention is also based on an operating method for a roll stand,

• wherein a flat rolling stock passing through the roll stand is rolled between two similar rolls of the roll stand,
• an automation unit controlling the roll stand using a roll model based on operating data of the roll stand for the two identical rolls in the direction of the roll axes, at least at predefined determination positions, repeatedly determining the temperatures and / or the diameter of the rolls and building on the determined temperatures and / or diameters a control of the roll stand is determined, so that a roll gap of the roll stand is set during the rolling of the flat rolling stock, if possible according to target specifications,
• The rolls of the same type are removed from the roll stand from time to time and transferred to a roll changing car.

When rolling flat rolled goods made of metal, the roll gap is usually calculated as part of the so-called level 2 automation. Complex models are used to calculate the roll gap, which for example the Roll adjustment, roll bending, roll flattening, roll crowning, roll wear, roll temperature, the temperature of the rolled stock and more. Some of the sizes mentioned are given as the respective course over the roll barrel width. For example, a roller is local (the term “local” refers to the location viewed in the direction of the roller axis), the thicker the higher the temperature of the roller at the respective location. Conversely, the roller is locally thinner, the higher the wear or abrasion of the roller at the respective point.

The absolute accuracy with which the roll gap must be calculated is greater, the smaller the roll gap is. With a roll gap of - for example - 3 cm, an accuracy of 20 µm or 50 µm may be perfectly acceptable. In the case of a roll gap of - for example - 1.2 mm, however, such an accuracy is generally no longer acceptable.

As already mentioned, the roll gap is influenced, among other things, by the local temperature of the rolls. Furthermore, the roll gap is also influenced by the abrasion to which the rolls are subjected during operation. In addition, the material temperature of the flat rolled stock also depends, within certain limits, on the temperature, in particular of the work rolls. The temperature of the rolling stock is, in turn, an important criterion for correctly determining the rolling force, for example. This applies to both hot rolling and cold rolling.

Both the temperature of the work rolls and the abrasion or wear cannot be measured directly during rolling. For this reason, roll models are used, by means of which the temperature of the work rolls and also the wear of the work rolls are determined with the aid of models based on measurable and otherwise known operating parameters of the roll stand. Analogous procedures can may also be used for other pairs of rolls of a roll stand, for example for the back-up rolls of a four-high stand or for the intermediate rolls of a six-high stand arranged between the back-up rolls and the work rolls.

The models used to model the rolls and the roll gap are flawed. It is therefore the endeavor of the person skilled in the art to optimize the models. This also applies to the roller model, among other things.

State of the art

From the WO 2012/025 266 A1 a method is known by means of which, in the case of a roll of a roll stand, both the temperature of the roll and the wear of the roll can be determined. The determination takes place, viewed in the direction of the roller axis, with spatial resolution.

From the WO 2017/144 227 A1 and the WO 2011/124 585 A1 Procedures are known by means of which the work rolls of a rolling stand can be changed while the rolling stand is being passed through by a flat rolling stock.

Summary of the invention

The object of the present invention is to create possibilities by means of which a roll model, by means of which the temperatures of rolls and their wear and thus their diameter can be determined spatially resolved in the direction of the roll axes, can be optimized in a simple and reliable manner.

The object is achieved by a storage device with the features of claim 1. Advantageous configurations of the storage device are the subject matter of the dependent claims 2 to 8.

According to the invention, a bearing device of the type mentioned at the outset is designed in that the bearing device has at least one measuring system, by means of which the temperatures and / or the diameter of the rollers, viewed in the direction of the roller axes, can be recorded individually and independently of one another at least at predefined recording positions.

As a result, the actual temperatures and / or the actual diameters of the rollers can be recorded using measurement technology, so that they can be compared with the corresponding values determined with the aid of a model and the roller model can be adapted based on the comparison.

As already mentioned, it is possible - even if only in exceptional cases - that the storage device is part of the roll stand. As a rule, however, this configuration only makes sense in a special configuration. As a rule, however, the storage device is designed as a roll changing carriage. In this case, it can be ensured in a particularly simple manner that the measuring system is not exposed to the rough operation of the roll stand, as occurs when the flat rolled stock is rolled.

It is possible for the measuring system per roller to have several measuring devices that are stationary with respect to a base body of the bearing device, so that by means of the measuring devices the temperature and / or the diameter of the respective roller, viewed in the direction of the roller axes, can be detected at one of the predefined detection positions. In such a configuration, viewed in the direction of the roll axes, for example, a measuring device can be provided every 10 cm or every 20 cm, by means of which the temperature and / or the diameter of the respective roll can be detected at the respective point.

Alternatively, it is possible for the measuring system to have several measuring devices per roller, which are movable in the direction of the roller axes with respect to a base body of the bearing device are, so that by means of the measuring devices the temperature and / or the diameter of the respective roll viewed in the direction of the roll axes can be detected in a respective sub-section comprising at least one of the predefined detection positions. For example, starting from a central position of the respective measuring device, the measuring devices can be displaceable by 5 cm, 8 cm, 12 cm or 15 cm to the left and right as viewed in the direction of the roller axes. In this case, the temperature and / or the diameter of the respective roller in a respective sub-area of 10 cm, 16 cm, 24 cm or 30 cm can be recorded by means of one of the measuring devices. As before, the numerical values mentioned are purely exemplary. Depending on the size of the sub-areas and their offset relative to one another - for example 10 cm or 20 cm - the sub-areas can overlap or be disjoint from one another.

Again, as an alternative, it is possible for the measuring system to have a single measuring device for each roll, by means of which the temperatures and / or the diameter of the respective roll can be detected, viewed in the direction of the roll axes, at least at all of the predefined detection positions. This embodiment has the advantage that only a minimal number of measuring devices is required.

In the latter case, two alternative configurations are possible.

On the one hand, it is possible for the measuring device to be arranged movably on a base body of the bearing device, viewed in the direction of the roll axes, so that the measuring device can be moved over the entire effective barrel length of the rolls. In this case, the rollers are first arranged in the base body of the bearing device. Then the measuring device is moved along the rollers. During this traversing movement, which may be interrupted again and again for a single measurement process, the temperatures and / or the diameter of the rollers are recorded.

On the other hand, it is possible for the measuring device to be arranged in a stationary manner on a base body of the bearing device in such a way that the respective roll is moved past the measuring device when it is transferred from the roll stand to a roll changing carriage or vice versa. This configuration is particularly simple, since no further moving parts are required beyond those parts that have to be present anyway for transferring the rolls from the roll stand to the roll changing carriage or vice versa. Furthermore, this embodiment can specifically be implemented not only with a roll changing carriage, but also with a roll stand itself. In particular, the measuring device can in this case be arranged in a protected area of the stand upright on the operator's side.

It is possible for the recorded measured values to be fed manually to an automation unit that controls the rolling stand. Preferably, however, the measuring system is connected to this automation unit in terms of data technology and automatically transmits the recorded temperatures and / or diameters to the automation unit, so that the recorded temperatures and / or diameters can be assigned to the predefined detection positions by the automation unit. For this purpose, it may be necessary that, in addition to the temperatures and / or diameters, the detection positions are also transmitted to the automation unit.

• dass während des Ausbaus der Walzen aus dem Walzgerüst und des Überführens der Walzen in den Walzenwechselwagen oder in unmittelbarem zeitlichem Anschluss daran mittels eines am Walzgerüst oder am Walzenwechselwagen angeordneten Messsystems automatisiert in Richtung der Walzenachsen gesehen zumindest an vordefinierten Erfassungspositionen die Temperaturen und/oder die Durchmesser der beiden Walzen erfasst werden,
• dass die erfassten Temperaturen und/oder Durchmesser automatisch an die Automatisierungseinheit übermittelt werden, so dass die erfassten Temperaturen und/oder Durchmesser von der Automatisierungseinheit den vordefinierten Erfassungspositionen zuordenbar sind, und
• dass die Automatisierungseinheit die mittels des Walzenmodells ermittelten Temperaturen der Walzen und/oder die mittels des Walzenmodells ermittelten Durchmesser der Walzen mit den mittels des Messsystems erfassten Temperaturen der Walzen und/oder mit den mittels des Messsystems erfassten Durchmessern der Walzen vergleicht und anhand des Vergleichs das Walzenmodell adaptiert.

The object is also achieved by an operating method for a roll stand with the features of claim 9. According to the invention, an operating method of the type mentioned at the outset is designed by

• that during the removal of the rolls from the roll stand and the transfer of the rolls into the roll change car or immediately afterwards, automatically viewed in the direction of the roll axes by means of a measuring system arranged on the roll stand or on the roll change car The temperatures and / or the diameter of the two rollers are detected at least at predefined detection positions,
• that the recorded temperatures and / or diameters are automatically transmitted to the automation unit, so that the recorded temperatures and / or diameters can be assigned to the predefined recording positions by the automation unit, and
• that the automation unit compares the temperatures of the rolls determined by means of the roll model and / or the diameter of the rolls determined by means of the roll model with the temperatures of the rolls detected by means of the measuring system and / or with the diameters of the rolls detected by means of the measuring system and the roll model based on the comparison adapted.

Brief description of the drawings

FIG 1

eine mehrgerüstige Walzstraße während des Walzens eines Walzguts,

FIG 2

eine Modellierung eines Walzspaltes und eine Ermittlung einer Ansteuerung für ein Walzgerüst,

FIG 3

den Ausbau von Walzen des Walzgerüsts aus dem Walzgerüst,

FIG 4

die Walzstraße von FIG 1 während einer Walzpause,

FIG 5

ein Messsystem und eine Automatisierungseinrichtung,

FIG 6

ein Ablaufdiagramm,

FIG 7

eine mögliche Ausgestaltung eines Walzenwechselwagens,

FIG 8

eine Modifikation des Walzenwechselwagens von FIG 5,

FIG 9

eine weitere Modifikation des Walzenwechselwagens von FIG 5,

FIG 10

eine weitere mögliche Ausgestaltung eines Walzenwechselwagens und

FIG 11

eine mögliche Ausgestaltung eines Walzgerüsts.

The properties, features and advantages of this invention described above and the manner in which they are achieved will become clearer and more clearly understood in connection with the following description of the exemplary embodiments, which are explained in more detail in connection with the drawings. Here show in a schematic representation:

FIG 1

a multi-stand rolling mill during the rolling of a rolling stock,

FIG 2

a modeling of a roll gap and a determination of a control for a roll stand,

FIG 3

the removal of rolls of the roll stand from the roll stand,

FIG 4

the rolling mill of FIG 1 during a break from rolling,

FIG 5

a measuring system and an automation device,

FIG 6

a flow chart,

FIG 7

a possible design of a roll changing carriage,

FIG 8

a modification of the roll changing car from FIG 5 ,

FIG 9

another modification of the roll changing car from FIG 5 ,

FIG 10

a further possible embodiment of a roll changing carriage and

FIG 11

a possible configuration of a roll stand.

Description of the embodiments

According to FIG 1 If a flat rolling stock 1 made of metal passes through roll stands 2 of a rolling train and is thereby rolled. The rolling takes place in each case between two similar rolls 3 of the respective roll stand 2. The flat rolling stock 1 can be a strip or a heavy plate. The metal from which the flat rolling stock 1 is made can be steel or aluminum, for example. In principle, it is possible for the flat rolling stock 1 to be hot-rolled. However, the present invention is particularly advantageously applicable when the rolling is cold rolling. The two rolls 3 of the same type are generally the two work rolls of the respective roll stand 2, that is to say those rolls which act directly and directly on the flat rolling stock 1. Alternatively, it can be rolls that act directly or indirectly on the work rolls, for example in the case of a four-high stand or a six-high stand around the back-up rolls or in a six-high stand around the intermediate rolls arranged between the back-up rolls and the work rolls. In any case, the rollers 3 are similar in the sense that they are functionally similar and one of the two rollers 3 acts on the rolling stock 1 from above and the other from below.

The rolling train is controlled by an automation unit 4. In particular, the automation unit 4 thus also controls the roll stands 2. Below - as a representative of all roll stands 2 - in connection with FIG 2 the control of one of the roll stands 2 by the automation unit 4 is explained in more detail. It is pointed out in advance that that this type of control is generally known as such to those skilled in the art. Details on the specific implementation are therefore not required.

According to FIG 2 the automation unit 4 implements a roll model 5. The automation unit 4 supplies the roll model 5 with operating data BD of the roll stand 2. The operating data BD generally include actual properties of the flat rolling stock 1 as it enters the roll stand 2, such as, for example, its width, its thickness, its chemical composition and its temperature. The operating data BD generally also include target properties of the flat rolling stock 1 as it exits from the roll stand 2, such as, for example, its thickness together with the associated profile, associated contour and / or associated flatness. The automation unit 4 continues to apply, even if only temporarily, control data SD for the roll stand 2. The control data SD are also fed to the roller model 5. The control data SD can include, for example, the pitch, the rolling force, a bending force and others. Using the roll model 5, the control device determines the temperature T of the respective roll 3 and / or the diameter D of the respective roll 3 for the two identical rolls 3 when leaving the roll stand 2. The determination is carried out in all cases, viewed in the direction of the roll axes, spatially resolved. So it takes place at least at predefined determination positions p. The in FIG 2 However, the distance of 20 cm between adjacent determination positions p is only to be understood as a purely exemplary one.

The automation unit 4 then compares the expected actual properties of the flat rolling stock 1 determined by means of the rolling model 5 as it exits the roll stand 2 with the desired target properties of the flat rolling stock 1 when it exits the roll stand 2. The automation unit 4 then varies as necessary the tax data SD, in order to approximate the expected actual properties of the flat rolled stock 1 as it exits the roll stand 2 as closely as possible to the desired target properties of the flat rolled stock 1 as it leaves the roll stand 2. If necessary, an iterative approach is used. Varying the control data SD is in FIG 2 indicated by the fact that the operating data BD are fed to the roller model 5 exclusively from the automation unit 4, while the control data SD can be transmitted in both directions.

As already mentioned, the procedure explained is generally known and familiar as such to those skilled in the art. It is repeated over and over again when the flat rolling stock 1 is rolled, for example for a new section of the flat rolling stock 1 or for a subsequent flat rolling stock 1. As a result, the automation unit 4 determines again and again (spatially resolved, among other things, as seen in the direction of the roll axes) the temperatures T and / or the diameter D of the rolls 3 and, based on this, the respective control SD of the roll stand 2, that is to say the control data SD. Both the temperature-related expansion of the rollers 3 and their change in diameter D due to wear are included in the determination of the diameter D. Corresponding models are known to those skilled in the art under the term TWC (English: thermal wear crown). The temperature of the flat rolled stock 1 is often also determined as part of the modeling. This is also generally known and familiar to those skilled in the art.

After rolling a certain number of flat rolled products 1 - for example after rolling 20 or 25 flat rolled products 1 - the rolls 3 must be changed. For this purpose, as shown in FIG 3 a roll changing carriage 6 is positioned next to the roll stand 2, the rolls 3 of which are to be changed. In particular, the roll stand 2 has an operator-side stand 2 'and a drive-side stand 2 ". The roll changing carriage 6 is arranged next to the operator-side stand 2'.

Then the rolls 3 are removed from the roll stand 2 and, as in FIG FIG 3 is indicated by corresponding arrows, transferred to the roll changing carriage 6. The removed rollers 3 are in FIG 3 shown in dashed lines.

As a rule, a rolling break is inserted for this process, during which no flat rolling stock 1 is rolled in the rolling train. FIG 4 shows the corresponding condition of the rolling train. However, procedures are also known in which the rolls 3 can be changed while a flat rolling stock 1 is passing through the roll stand 2. In the context of the present invention, it is of subordinate importance whether one or the other procedure is used.

The rollers 3 can be dismantled and transferred to the roller changing carriage 6 of the rollers 3 in a conventional, generally known manner. What is important, however, is that the temperatures T and / or the diameter D of the two rolls 3 are recorded during the removal of the rolls 3 from the roll stand 2 and the transfer of the rolls 3 to the roll changing carriage 6 or immediately thereafter. The detection therefore takes place before the roll changing carriage 6 is removed from the roll stand 2.

The detection takes place in an automated manner by means of a measuring system 7 which is arranged on the roll stand 2 or on the roll changing carriage 6. Furthermore, when viewed in the direction of the roller axes, the detection takes place in a spatially resolved manner, namely at least at predefined detection positions p '. Immediately adjacent detection positions p 'can - for example - have a distance of 8 cm, 10 cm, 12 cm, 15 cm or 20 cm from one another.

Furthermore, the temperatures T and / or the diameter D are recorded individually and independently of one another by means of the measuring system 7. On the basis of the temperature T detected for a specific detection position p ′, it is not possible, or at least not statements about the temperature T for another detection position p 'cannot be derived without further ado. The same applies to the recorded diameter D. Possible implementations of this procedure will be explained later.

The recorded temperatures T and / or diameter D are automatically transmitted from the measuring system 7 to the automation unit 4. For this purpose, the measuring system 7 is connected to the automation unit 4 in terms of data technology. As an alternative, wired transmission or wireless transmission is possible here. To implement wireless transmission, the measuring system 7 and the automation unit 4 can, for example, correspond to the illustration in FIG FIG 5 implement a radio link via antennas 8.

The acquired temperatures T and / or diameter D are transmitted in a manner that enables the automation unit 4 to assign the acquired temperatures T and / or diameter D to the predefined acquisition positions p ′. For example, the detection positions p 'can also be transmitted. It is also possible for the automation unit 4 to know in advance at which detection positions p ′ the temperatures T and / or diameter D are recorded and in which order the recorded temperatures T and / or diameter D are transmitted from the measuring system 7 to the automation unit 4 become.

The automation unit 4 takes the transmitted temperatures T and / or diameter D according to FIG 6 counter in a step S1. In a step S2, a coordinate adjustment is carried out for the automation unit 4. For example, using the temperatures T and / or diameter D detected for the detection positions p ′, the corresponding temperatures T and / or diameter D can be determined for the detection positions p by linear or other interpolation become. Alternatively, in step S2, the temperatures T and / or diameter D determined with the aid of a model for the determination positions p can be converted to the acquisition positions p ′ by linear or other interpolation. If the detection positions p 'and the determination positions p correspond directly to one another, step S2 can be omitted.

In a step S3, the automation unit 4 compares the temperatures T determined by means of the roller model 5 and / or the corresponding diameters D of the rollers 3 with the temperatures T and / or diameters D of the rollers 3 recorded by the measuring system 7 Step S3, based on the comparison of the temperatures T, determine a first change value δk1 for a first model parameter k1 of the roll model 5 and, based on the comparison of the diameter D, determine a second change value δk2 for a second model parameter k2 of the roll model 5. Using the determined change values δk1, δk2, the automation unit 4 can then track the model parameters k1, k2 in a step S4 and thereby adapt the roller model 5. The model parameters k1, k2 are included - of course - in the determination of the temperatures T and / or the diameter D of the rollers 3, which are carried out by means of the roller model 5.

The following are now in connection with the FIGS. 7 to 11 possible configurations explained, on which the detection of the temperatures T and / or diameter D can take place.

In all of the configurations there is a bearing device for the two rollers 3. In most configurations, the storage device is according to the illustrations in FIGS 7 to 10 designed as a roll changing carriage 6. In this case, the storage device (that is to say the roll changing carriage 6) can be positioned relative to the roll stand 2 in such a way that the rolls 3 can be transferred from the roll stand 2 to the storage device or vice versa. In individual cases, the storage facility as shown in FIG 11 however, it can also be part of the roll stand 2 itself.

For example, as shown in FIG 7 It is possible for the measuring system 7 to have several measuring devices 9 per roller 2. The measuring devices 9 are in accordance with the embodiment FIG 7 arranged stationary with respect to a base body 10 of the roll changing carriage 6. By means of the measuring devices 9, the temperature T and / or the diameter D of the respective roller 3, viewed in the direction of the roller axes, are recorded at one of the predefined detection positions p ′. As part of the design according to FIG 7 the rolls 3 are therefore first removed from the roll stand 2 and transferred to the roll changing carriage 6. Thereafter, each measuring device 6 detects the temperature T and / or the diameter D of the relevant roller 3 for its respective detection position p '. The detection of the temperature T can alternatively take place via contact or non-contact. A contact-based detection of the temperature T can take place, for example, via a measuring probe. For this purpose, the measuring probe can implement a PT100 element, for example. A contact-based detection of the diameter D can optionally also be carried out using the same or a different measuring probe. To detect the diameter D, the corresponding measuring probe can be designed, for example, similar to a micrometer screw. Alternatively, for example by means of an infrared camera, the temperature T can be detected without contact. Likewise, for example, using a laser-based distance measurement or an ultrasound-based distance measurement, a contactless detection of the diameter D can take place.

FIG 8 shows a configuration similar to FIG 7 . Even with the design according to FIG 8 the measuring system 7 has several measuring devices 9 per roller 2. In contrast to the design of FIG 7 however, in the embodiment according to FIG. 1, the measuring devices 9 can be moved individually or jointly with respect to the base body 10 in the direction of the roller axes arranged. The mobility is in FIG 8 indicated by corresponding double arrows. As a result, the temperature T and / or the diameter D of the respective roll 3, viewed in the direction of the roll axes, can be detected by means of the measuring devices 9 in a respective subsection comprising at least one of the predefined detection positions p '. Otherwise, the remarks are to FIG 7 still valid.

In the embodiments according to FIG 7 and 8th the measuring system 7 has a plurality of measuring devices 9 for each roller 3. However, it is also possible for the measuring system 7 to have only one individual measuring device 9 per roller 3. In this case, the temperatures T and / or the diameter D of the respective roller 3, viewed in the direction of the roller axes, must be detectable by means of the individual measuring device 9 at least at all of the predefined detection positions p ′.

To enable such a detection, for example, the design of FIG 9 be seized. FIG 9 is essentially an embodiment of FIG 8 . The difference is that in contrast to the design of FIG 8 There is only one measuring device 9 per roller 3, but in return the area over which this measuring device 9 can be moved in the direction of the roller axes is correspondingly large, so that the measuring device 9 is moved at least over the entire effective barrel length of the rollers 3 can. The mobility is in FIG 9 - analogous to FIG 8 - indicated by corresponding double arrows.

As a result, for data acquisition at all of the predefined acquisition positions p ′ by means of a single measuring device 9 per roller 3, only the relative movement of the measuring device 9 relative to the roller 3 is important. It does not matter whether the roller 3 rests in the base body 10 of the roller changing carriage 6 and the measuring device 9 is moved or, conversely, whether the measuring device 9 is at rest and the roller 3 is moved during the data acquisition. It is therefore appropriate the representation in FIG 10 in kinematic reversal of the procedure of FIG 9 possible to arrange the measuring device 9 in a stationary manner on the base body 10 of the roll changing carriage 6. In this case, the measuring device 9 only has to be arranged in such a way that the respective roll 3 is moved past the measuring device 9 when it is transferred from the roll stand 2 to the roll changing carriage 6 or vice versa. This can easily be achieved.

Exactly this configuration - i.e. the configuration in which the measuring device 9 is arranged in a stationary manner and the respective roll 3 is moved past the measuring device 9 when it is transferred from the roll stand 2 to the roll changing carriage 6 or vice versa - can also be implemented in such a way that the measuring device 9 does not is arranged stationary on the roll changing carriage 6, but according to the illustration in FIG 11 on the roll stand 2 itself, in particular on the service-side stand 2 '. In this case, the storage device is part of the roll stand 2.

The present invention has many advantages. In particular, constant tracking of the model parameters k1, k2 of the roller model 5 is possible in a simple and reliable manner. Due to the improved modeling, the quality when rolling the rolling stock 1 can also be improved. In particular, the thickness, flatness and contour quality can be increased. A modeling of the temperature of the rolling stock 1 can also be improved. Furthermore, an improved forecast is possible when rolling new materials.

Although the invention has been illustrated and described in more detail by the preferred exemplary embodiment, the invention is not restricted by the disclosed examples and other variants can be derived therefrom by the person skilled in the art without departing from the scope of protection of the invention.

List of reference symbols

1

Rolling stock

2

Roll stand

2 ', 2 "

Scaffolding stand

3

Rollers

4th

Automation unit

5

Roller model

6th

Roll changing car

7th

Measuring system

8th

Antennas

9

Measuring devices

10

Base body

BD

Operating data

D.

diameter

k1, k2

Model parameters

p

Investigative positions

p '

Entry positions

S1 to S4

steps

SD

Tax data

T

Temperatures

δk1, δk2

Change values

Claims (9)

Storage device for two similar rolls (3) of a roll stand (2), the storage device being part of the roll stand (2) or being positionable relative to the roll stand (2) in such a way that the rollers (3) move from the roll stand (2) into the storage device or vice versa are transferrable,
characterized,
that the storage device has at least one measuring system (7) by means of which the temperatures (T) and / or the diameter (D) of the rollers (3) viewed in the direction of the roller axes can be recorded individually and independently of one another at least at predefined recording positions (p ') . Storage device according to claim 1,
characterized,
that the storage device is designed as a roll changing carriage (6). Storage device according to claim 2,
characterized,
that the measuring system (7) per roller (3) has several measuring devices (9) which are stationary with respect to a base body (10) of the bearing device, so that by means of the measuring devices (9) the temperature (T) and / or the diameter (D) of the respective Roller (3), viewed in the direction of the roller axes, can be detected at one of the predefined detection positions (p '). Storage device according to claim 2,
characterized,
that the measuring system (7) has several measuring devices (9) per roller (3) which are movable in the direction of the roller axes with respect to a base body (10) of the bearing device, so that the temperature (T) and / or the diameter (D) of the respective roller (3) viewed in the direction of the roller axes in at least one in each case one of the predefined detection positions (p ') comprising respective subsections can be detected. Storage device according to claim 1 or 2,
characterized,
that the measuring system (7) has a single measuring device (9) per roll (3), by means of which the temperatures (T) and / or the diameter (D) of the respective roll (3) viewed in the direction of the roll axes at least at all of the predefined Detection positions (p ') are detectable. Storage device according to claim 5,
characterized,
that the measuring device (9) is arranged movably on a base body (10) of the bearing device, viewed in the direction of the roller axes, so that the measuring device (9) can be moved over the entire effective barrel length of the rollers (3). Storage device according to claim 5,
characterized,
that the measuring device (9) is fixedly arranged on a base body (10) of the storage device in such a way that the respective roll (3) is moved past the measuring device (9) when it is transferred from the roll stand (2) to a roll changing carriage (6) or vice versa . Storage device according to one of the above claims,
characterized,
that the measuring system (7) is connected in terms of data technology to an automation unit (4) controlling the rolling stand (2) and that the measuring system (7) automatically transmits the recorded temperatures (T) and / or diameter (D) to the automation unit (4), so that the recorded temperatures (T) and / or diameter (D) can be assigned to the predefined detection positions (p ') by the automation unit (4). Operating procedure for a roll stand (2), - wherein a flat rolling stock (1) passing through the roll stand (2) is rolled between two similar rolls (3) of the roll stand (2), - wherein an automation unit (4) controlling the roll stand (2) by means of a roll model (5) based on operating data (BD) of the roll stand (2) for the two similar rolls (3) viewed in the direction of the roll axes at least at predefined determination positions (p) the temperatures (T) and / or the diameter (D) of the rolls (3) are repeatedly determined and, based on the determined temperatures (T) and / or diameters (D), a control (SD) of the roll stand (2) is determined, see above that a roll gap of the roll stand (2) is set during the rolling of the flat rolling stock (1), if possible according to target specifications, - the rolls (3) of the same type being removed from the roll stand (2) from time to time and transferred to a roll changing carriage (6), characterized, - that during the removal of the rolls (3) from the roll stand (2) and the transfer of the rolls (3) into the roll change carriage (6) or immediately afterwards by means of one on the roll stand (2) or on the roll change carriage (6) Measuring system (7), viewed automatically in the direction of the roll axes, at least at predefined detection positions (p '), the temperatures (T) and / or the diameter (D) of the two rolls (3) are detected, - That the recorded temperatures (T) and / or diameter (D) are automatically transmitted to the automation unit (4), so that the recorded temperatures (T) and / or diameter (D) from the automation unit (4) to the predefined detection positions ( p ') can be assigned, and - That the automation unit (4) the temperatures (T) of the rolls (3) determined by means of the roll model (5) and / or the diameter (D) of the rolls (3) determined by means of the roll model (5) with the means of the measuring system (7) compares the recorded temperatures (T) of the rollers (3) and / or with the diameters (D) of the rollers (3) recorded by means of the measuring system (7) and adapts the roller model (5) based on the comparison.

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