EP3851217B1 - Improved roll model adaptation - Google Patents

Description

field of technology

The present invention is based on a bearing device for two identical rolls of a roll stand, the bearing 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 bearing device or vice versa. A generic device is off DE 101 38 588 A1 known.

• 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 identical 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 rolls of the same type, viewed in the direction of the roll axes, repeatedly determines the temperatures and/or the diameters of the rolls at least at predefined determination positions and based 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, in accordance with target specifications,
• the rolls of the same type being removed from the roll stand from time to time and transferred to a roll-changing carriage.

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, roll adjustment, roll deflection, roll flattening, roll crowning, roll wear, roll temperature, temperature of the rolling stock and others. Some of the variables mentioned are specified as a respective progression over the width of the roll barrel. For example, a roll is locally (the term "locally" refers to the location seen in the direction of the roll axis) thicker, the higher the temperature of the roll at the respective location. Conversely, the roller is thinner locally, the higher the wear or abrasion of the roller at the respective location.

The smaller the roll gap, the greater the absolute accuracy with which the roll gap must be calculated. With a roll gap of - for example - 3 cm, an accuracy of 20 µm or 50 µm may well be acceptable. With 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 rolling stock also depends, within certain limits, on the temperature of the work rolls in particular. In turn, the temperature of the rolling stock 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 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 using measurable and otherwise known operating parameters of the roll stand. Similar procedures can optionally also for other roll pairs 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 within the striving 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 both the temperature of the roll and the wear of the roll can be determined in the case of a roll of a roll stand. The determination is spatially resolved as viewed in the direction of the roll axis.

From the WO 2017/144 227 A1 and the WO 2011/124585 A1 Procedures are known by means of which work rolls of a roll stand can be changed while the roll stand is being traversed by a flat rolled 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 in a spatially resolved manner viewed 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 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 diameters of the rolls, seen in the direction of the roll axes, can be detected individually and independently of one another at least at predefined detection positions.

As a result, the actual temperatures and/or the actual diameters of the rolls can be measured, so that they can be compared with the corresponding values determined with the aid of a model, and the roll model can be adapted based on the comparison.

As already mentioned, it is possible, even if only in exceptional cases, for the storage device to be 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 rolling the flat rolled stock.

It is possible for the measuring system per roll to have several measuring devices that are stationary with respect to a base body of the bearing device, so that the temperature and/or the diameter of the respective roll, seen in the direction of the roll axes, can be detected at one of the predefined detection positions by means of the measuring devices. In such an embodiment, 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 recorded at the respective point.

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

Alternatively, it is again possible for the measuring system to have a single measuring device for each roll, by means of which the temperatures and/or the diameters of the respective roll, seen in the direction of the roll axes, can be detected at least at all of the predefined detection positions. This configuration has the advantage that only a minimum number of measuring devices is required.

In the latter case, two configurations that are alternative to one another are again possible.

On the one hand, it is possible for the measuring device to be arranged on a base body of the bearing device so that it can be moved 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 initially arranged in the base body of the bearing device. Then the measuring device is moved along the rollers. The temperatures and/or the diameters of the rolls are recorded during this travel movement, which may be interrupted again and again for a single measurement process.

On the other hand, it is possible that the measuring device is arranged stationary on a base body of the storage device such that the respective roll is moved past the measuring device during transfer from the roll stand to a roll changing carriage or vice versa. This configuration is particularly simple, since no other moving parts are required beyond those parts which must be present anyway for transferring the rolls from the roll stand to the roll-changing carriage or vice versa. Furthermore, this configuration can be implemented not only in a roll changing carriage, but also in a roll stand itself. In particular, the measuring device can be arranged in a protected area of the stand on the operator side in this case.

It is possible for the recorded measurement values to be fed manually to an automation unit that controls the roll stand. However, the measuring system is preferably 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 recording positions by the automation unit. It may be necessary for this purpose for the detection positions to be transmitted to the automation unit in addition to the temperatures and/or diameters.

• 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 in that

• that during the removal of the rolls from the roll stand and the transfer of the rolls into the roll changing carriage or immediately thereafter by means of an automated measuring system arranged on the roll stand or on the roll changing carriage, viewed in the direction of the roll axes the temperatures and/or the diameters of the two rolls are recorded at least at predefined recording 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 by the automation unit to the predefined recording positions, and
• that the automation unit compares the temperatures of the rolls determined by means of the roll model and/or the diameters 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 based on the comparison the roll model 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 characteristics, 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. This shows 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,

3

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

FIG 4

the rolling mill of FIG 1 during a rolling break,

5

a measuring system and an automation device,

6

a flowchart,

FIG 7

a possible design of a roll changing carriage,

8

a modification of the roll changing car from 5 ,

9

another modification of the roll changing car from 5 ,

10

another possible embodiment of a roll changing carriage and

11

a possible configuration of a roll stand.

Description of the embodiments

According to FIG 1 passes through a flat rolling stock 1 made of metal roll stands 2 of a rolling train and is thereby rolled. The rolling takes place between two identical 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 advantageously applicable particularly when the rolling is cold rolling. The two rolls 3 of the same type are usually the two work rolls of the respective roll stand 2, ie those rolls which act directly and immediately on the flat rolling stock 1. Alternatively, they can be rolls that act directly or indirectly on the work rolls, for example in 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 rolls 3 are similar in the sense that they are functionally similar and one of the two rolls 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—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 this type of control as such is well known to those skilled in the art. Details on the concrete implementation are therefore not required.

According to FIG 2 the automation unit 4 implements a roll model 5. The automation unit 4 feeds 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 when it enters the roll stand 2, such as its width, its thickness, its chemical composition and its temperature. As a rule, the operating data BD also include target properties of the flat rolling stock 1 when it leaves the roll stand 2, such as its thickness together with the associated profile, associated contour and/or associated flatness. The automation unit 4 continues to use control data SD for the roll stand 2, even if only temporarily. The control data SD are also supplied to the roller model 5. The control data SD can include, for example, the adjustment, 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 rolls 3 of the same type when exiting the roll stand 2. In all cases, the determination is carried out in a spatially resolved manner as viewed in the direction of the roll axes. It therefore takes place at least at predefined determination positions p. the inside FIG 2 However, the distance between adjacent determination positions p of 20 cm that is drawn in is only to be understood as an example.

The automation unit 4 then compares the expected actual properties of the flat rolling stock 1 determined by means of the rolling model 5 when leaving the rolling stand 2 with the desired target properties of the flat rolling stock 1 when leaving the rolling stand 2. If necessary, the automation unit 4 then varies the tax data SD, in order to approximate the expected actual properties of the flat rolling stock 1 when leaving the rolling stand 2 as closely as possible to the desired target properties of the flat rolling stock 1 when leaving the rolling stand 2. If necessary, an iterative procedure is used. Varying the control data SD is in FIG 2 indicated by the fact that the operating data BD are supplied to the roller model 5 exclusively by 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 to those skilled in the art. It is carried out again and again during the rolling of the flat rolling stock 1, 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 the result (among other things and spatially resolved as seen in the direction of the roll axes) again and again the temperatures T and/or the diameters D of the rolls 3 and, based on this, the respective activation SD of the roll stand 2, ie the control data SD. In determining the diameter D, both the temperature-related expansion of the rolls 3 and their wear-related change in the diameter D are included. Corresponding models are known to experts under the term TWC (English: thermal wear crown). The temperature of the flat rolling stock 1 is often also determined as part of the modelling. This is also generally known and familiar to those skilled in the art.

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

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

As a rule, a rolling pause is inserted for this process, during which no flat rolling stock 1 is rolled in the rolling train. FIG 4 shows the corresponding state of the rolling mill. 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 . Whether one or the other procedure is taken is of secondary importance within the scope of the present invention.

The rolls 3 can be dismantled and the rolls 3 transferred to the roll-changing carriage 6 in a conventional, well-known manner. It is important, however, that the temperatures T and/or the diameters 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 automatically by means of a measuring system 7 which is arranged on the rolling stand 2 or on the roll-changing carriage 6 . Furthermore, the detection takes place in a spatially resolved manner as viewed in the direction of the roller axes, 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 diameters D are recorded individually and independently of one another by means of the measuring system 7 . On the basis of the temperature T recorded for a specific recording position p', it is therefore not possible, or at least Statements about the temperature T for a different detection position p' cannot be derived without further ado. A similar situation applies to the detected diameters D. Possible implementations of this procedure will be explained later.

The recorded temperatures T and/or diameters D are automatically transmitted to the automation unit 4 by the measuring system 7 . For this purpose, the measuring system 7 is connected to the automation unit 4 in terms of data technology. Wired transmission or wireless transmission is alternatively possible. To implement wireless transmission, the measuring system 7 and the automation unit 4 can be used, for example, as shown in 5 implement a radio link via antennas 8 .

The recorded temperatures T and/or diameter D are transmitted in such a way that the automation unit 4 is able to assign the recorded temperatures T and/or diameter D to the predefined recording 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 detected and in which order the detected temperatures T and/or diameter D are transmitted from the measuring system 7 to the automation unit 4 will.

The automation unit 4 takes the transmitted temperatures T and/or diameter D accordingly 6 in a step S1 against. In a step S2 for the automation unit 4 coordinates adjustment. For example, the corresponding temperatures T and/or diameter D can be determined for the determination positions p on the basis of the temperatures T and/or diameter D detected for the detection positions p′ by linear or other interpolation will. 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 detection 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 and/or the corresponding diameters D of the rolls 3 determined by means of the roll model 5 with the temperatures T and/or diameters D of the rolls 3 detected by means of the measuring system 7. In particular, the automation unit 4 can Step S3 determine a first change value δk1 for a first model parameter k1 of the roll model 5 based on the comparison of the temperatures T and a second change value δk2 for a second model parameter k2 of the roll model 5 based on the comparison of the diameter D. Using the determined change values δk1, δk2, the automation unit 4 can then update the model parameters k1, k2 in a step S4 and thereby adapt the roller model 5. The model parameters k1, k2 go - of course - in the determination of the temperatures T and / or the diameter D of the rollers 3, which takes place by means of the roller model 5.

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

A bearing device for the two rollers 3 is present in all of the configurations. In most configurations, the storage facility is as shown in FIGS 7 to 10 designed as a roll changing carriage 6. In this case, the storage device (ie 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 11 but also be part of the roll stand 2 itself.

This is the case, for example, as shown in FIG 7 It is possible for the measuring system 7 to have a plurality of measuring devices 9 per roll 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 . The temperature T and/or the diameter D of the respective roll 3 seen in the direction of the roll axes are detected by means of the measuring devices 9 at one of the predefined detection positions p′. In accordance with the design FIG 7 ie the rolls 3 are first removed from the roll stand 2 and transferred to the roll-changing carriage 6 . Each measuring device 6 then records the temperature T and/or the diameter D of the roll 3 in question for its respective recording position p′. The temperature T can alternatively be recorded via contact or without contact. A contact-based detection of the temperature T can be done, for example, using a probe. For this purpose, the probe can implement a PT100 element, for example. A contact-based detection of the diameter D can optionally also take place via the same or a different measuring probe. For detecting the diameter D, the corresponding measuring probe can be designed similar to a micrometer screw, for example. Alternatively, the temperature T can be recorded without contact--for example by means of an infrared camera. A non-contact detection of the diameter D can also take place--for example via a laser-based distance measurement or an ultrasound-based distance measurement.

8 shows a similar configuration FIG 7 . Also in accordance with the design 8 the measuring system 7 has several measuring devices 9 per roll 2 . In contrast to the design of FIG 7 however, the measuring devices 9 in the embodiment according to FIG arranged. Mobility is in 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 section comprising at least one of the predefined detection positions p′. For the rest, the statements FIG 7 still valid.

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

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

As a result, only the relative movement of the measuring device 9 relative to the roller 3 is important for data acquisition at all of the predefined acquisition positions p′ by means of a single measuring device 9 per roller 3 . It is therefore irrelevant whether, during the data acquisition, the roll 3 is stationary in the base body 10 of the roll changing carriage 6 and the measuring device 9 is being moved, or vice versa, if the measuring device 9 is stationary and the roll 3 is being moved. It is therefore appropriate the representation in 10 in kinematic reversal of the procedure of 9 possible to arrange the measuring device 9 on the base body 10 of the roll changing carriage 6 in a stationary manner. 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 during transfer from the roll stand 2 to the roll changing carriage 6 or vice versa. This is easily realizable.

Precisely this configuration - i.e. the configuration in which the measuring device 9 is stationary and the respective 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 the measuring device 9 is not is stationarily arranged on the roll changing carriage 6, but according to the illustration in 11 on the roll stand 2 itself, in particular on the operator-side stand 2'. In this case, the storage device is part of the roll stand 2.

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

Although the invention has been illustrated and described in detail by the preferred embodiment, the invention is not limited by the disclosed examples and other variants can be derived therefrom by a person skilled in the art without departing from the protective scope of the invention as defined by the claims.

Reference List

1

rolling stock

2

mill stand

2', 2"

scaffold stand

3

rolls

4

automation unit

5

roller model

6

roller changing car

7

measuring system

8th

antennas

9

measuring devices

10

body

BD

operational data

D

diameter

k1, k2

model parameters

p

investigative positions

p'

registration positions

S1 to S4

steps

SD

tax data

T

temperatures

δk1, δk2

change values

Claims (9)

1. Storage device for two rolls (3) of the same type in a roll stand (2), wherein the storage device is a component part of the roll stand (2) or 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) into the storage device or vice versa, characterized
   in that the storage device has at least one measuring system (7), by means of which the temperatures (T) and/or the diameters (D) of the rolls (3) can be detected individually and independently of one another, at least at predefined detection positions (p'), as viewed in the direction of the roll axes.
2. Storage device according to Claim 1,
   characterized
   in that the storage device is designed as a roll changing carriage (6).
3. Storage device according to Claim 2,
   characterized
   in that, for each roll (3), the measuring system (7) has a plurality of measuring devices (9) that are fixed in location relative to a main body (10) of the storage device, thus enabling the temperature (T) and/or the diameter (D) of the respective roll (3) to be detected at in each case one of the predefined detection positions (p'), as viewed in the direction of the roll axes, by means of the measuring devices (9) .
4. Storage device according to Claim 2,
   characterized
   in that, for each roll (3), the measuring system (7) has a plurality of measuring devices (9) that are movable in the direction of the roll axes relative to a main body (10) of the storage device, thus enabling the temperature (T) and/or the diameter (D) of the respective roll (3) to be detected in a respective subsection including in each case at least one of the predefined detection positions (p'), as viewed in the direction of the roll axes, by means of the measuring devices (9) .
5. Storage device according to Claim 1 or 2,
   characterized
   in that, for each roll (3), the measuring system (7) has a single measuring device (9), by means of which the temperatures (T) and/or the diameters (D) of the respective roll (3) can be detected at least at all of the predefined detection positions (p'), as viewed in the direction of the roll axes.
6. Storage device according to Claim 5,
   characterized
   in that the measuring device (9) is arranged on a main body (10) of the storage device in such a way as to be movable as viewed in the direction of the roll axes, thus enabling the measuring device (9) to be moved over the entire effective barrel length of the rolls (3).
7. Storage device according to Claim 5,
   characterized
   in that the measuring device (9) is arranged in a fixed location on a main body (10) of the storage device in such a way that the respective roll (3) is moved past the measuring device (9) during transfer from the roll stand (2) into a roll changing carriage (6) or vice versa.
8. Storage device according to any of the above claims, characterized
   in that there is a data link between the measuring system (7) and an automation unit (4) that controls the roll stand (2), and in that the measuring system (7) transmits the detected temperatures (T) and/or diameters (D) automatically to the automation unit (4), thus enabling the detected temperatures (T) and/or diameters (D) to be associated with the predefined detection positions (p') by the automation unit (4).
9. Operating method for a roll stand (2),

   - wherein flat rolling stock (1) passing through the roll stand (2) is rolled between two rolls (3) of the same type in the roll stand (2),

   - wherein an automation unit (4) that controls the roll stand (2) repeatedly determines the temperatures (T) and/or the diameters (D) of the rolls (3), at least at predefined determination positions (p), as viewed in the direction of the roll axes, by means of a roll model (5) using operating data (BD) of the roll stand (2) for the two rolls (3) of the same type and, based on the temperatures (T) and/or diameters (D) determined, determines an activation (SD) of the roll stand (2), with the result that a rolling gap of the roll stand (2) is set during the rolling of the flat rolling stock (1), as far as possible in accordance with setpoint inputs,

   - wherein the rolls (3) of the same type are removed from the roll stand (2) from time to time and are transferred into a roll changing carriage (6),

   characterized

   - in that the temperatures (T) and/or the diameters (D) of the two rolls (3) are detected in an automated manner, at least at predefined detection positions (p'), as viewed in the direction of the roll axes, during the removal of the rolls (3) from the roll stand (2) and the transfer of the rolls (3) into the roll changing carriage (6) or immediately following this in time, by means of a measuring system (7) arranged on the roll stand (2) or on the roll changing carriage (6),

   - in that the detected temperatures (T) and/or diameters (D) are transmitted automatically to the automation unit (4), thus enabling the detected temperatures (T) and/or diameters (D) to be associated with the predefined detection positions (p') by the automation unit (4), and

   - in that the automation unit (4) compares the temperatures (T) of the rolls (3) determined by means of the roll model (5) and/or the diameters (D) of the rolls (3) determined by means of the roll model (5) with the temperatures (T) of the rolls (3) determined by means of the measuring system (7) and/or with the diameters (D) of the rolls (3) determined by means of the measuring system (7), and adapts the roll model (5) using the comparison.

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