WO2015028370A1 - Method and apparatus for controlling the temperature of rolls - Google Patents

Abstract

The invention relates to a method and to an apparatus for controlling the temperature of rolls (3, 5, 7), in particular of the rolls (3, 5, 7) of a rolling stand (1). The rolling stand (1) has in principle working rolls (3), supporting rolls (7) and, if appropriate, at least one intermediate roll (5), the intermediate rolls (5) advantageously being located between the working rolls (3) and the supporting rolls (7). The temperature of the rolls (3, 5, 7) is controlled by exposing the rolls (3, 5, 7) to a temperature control medium and/or to a heating source (17). It is provided that the temperature of both the working rolls (3) and at least one of the intermediate rolls (5) and/or if appropriate at least one of the supporting rolls (7) is controlled. By controlling the temperature of working rolls (3) and intermediate rolls (5), it is possible in particular to rapidly match the temperature of the rolling profile to the profile of the rolling stock (2), in particular in the region of the material processing. This leads to an improvement in the flatness of the rolling stock (2) after the rolling process.

Description

description

The invention relates to a method for tempering rolls according to the preamble of claim 1. The invention further relates to a device according to the preamble of claim 7, a roll stand with such a device and a rolling mill with such a roll stand.

In cold rolling of steel and non-ferrous metals, particularly aluminum, produces a large amount of heat by Rei ^¬ environment and by deformation of the machined rolled. The resulting heat causes heating of the rolls of a rolling mill. An uncontrolled heating of the work rolls leads to a reduction in the quality of the rolled product ^¬ ses.

From DE 10 2005 029 461 B3 discloses a method of applying a coolant to the rolling stock and / or at least ei ^¬ ne roller is known. By means of a flatness measuring system, the amount of cooling to be applied is determined.

It is an object of the invention to improve the flatness of the rolling stock after rolling.

The object is achieved by a method of the initially named kind ge ^¬ characterized in that both the working rolls and at least one of the intermediate rolls and / or at least one of the support rolls are heated.

The object is further achieved by a device having the features specified in claim 8. The object is further achieved by a rolling stand with the Merkma ^¬ len according to claim 10 and by a rolling mill with the features of claim 11. Roll stands, in particular for installation in rolling mills, usually consist of two work rolls, two support rolls and possibly two or more intermediate rolls. Work rolls usually have a small diameter compared to the back-up rolls. Intermediate rolls are oriented in their size, particularly of their diameter, usually on the Ar ^¬ beitswalzen. Back-up rolls are usually considerably heavier and larger than work rolls and / or back-up rolls. During the rolling process is released by the deformation of the rolling heat energy, which is used to heat the rolls and the

Walzgut leads. The heating of the rolls, particularly the Ar ^¬ beitswalzen, leads to expansion of the rollers.

By changing the diameter of the rolls, in particular the working rolls, the thickness of the product of the roll is increased

Rolling process changed to the detriment. In order to obtain a constant thickness and flatness of the rolled product, either the position of the work rolls and / or the support rollers must be adjusted and / or at least the work rolls tempered, in particular cooled, are. Advantageously, the work rolls and the intermediate rolls are tempered. The tempering of the work rolls and / or support rolls serves to modify the diameter and / or the course of the diameter along the axis of rotation of the tempered roll.

Thickness of the rolling stock is understood here to be the local thickness of the rolling stock. Local thickness means that the thickness of the profile of the rolling stock can be different. Eg, can the thickness at the center of the cross section that is pa rallel ^¬ to the rotational axes of the rolls increase in the middle or decrease. Of course, even more complex shapes of the rolling stock, in particular the cross section of the rolling, conceivable.

A temperature control is understood here to mean a partial heating and / or cooling of a roller. For example, the work roll is cooled cooled in the central region and possibly simultaneously or temporally heated near the end faces. Advantageously, the intermediate roll is cooled in the middle course and optionally heated in ih ^¬ rem outer region. Both the work rolls and the intermediate rolls are advantageously divided into regions, wherein at least one of the regions is tempered.

To ensure the thickness and the flatness of Walzerzeug ^¬ nisses - the work rolls are cooled - in the current state of the art. The main focus of the invention is therefore the additional temperature of the intermediate rolls in addition to a temperature of the work rolls. To further improve the flatness, a temperature control of the support rollers is advantageous. Back-up rolls are regularly very large, in particular in comparison to work rolls or intermediate rolls. Therefore offer

Back-up rolls heat storage to stabilize the temperature of the rolls. A tempering he work rolls and / or the intermediate rolls, in particular before the rolling process, an effective means to support the temperature control in the initial phase of the rolling process. By tempering the intermediate rolls and / or optionally the support rollers position of the work rolls and thus the thickness of the rolled product can be changed. Next leads a Temperaturaus ^¬ equal between each other acting rollers to protect the material of the rollers and the rolling stock. The temperature ^¬ balancing is achieved in particular by a tuned Temperie ^¬ tion of the working rolls the intermediate rolls and / or optionally the support rollers. Regularly carried out a mechanical displacement of the rolls based on the determined flatness and dimension of Walzgu ^¬ tes. The flatness and the dimension of the Walzgu ^¬ tes are determined according to the rolling process, and changes the position and / or orientation of the rolls on the basis of deviations ^¬ gene of flatness or dimensions. By the method described here, a modification of the diameter or its course along the. By means of the temperature of the work rolls, the intermediate rolls and optionally the support rollers Be influenced axis of rotation. Using the method described can be improved flatness and optionally the Genauig ^¬ ness of the thickness of the rolling stock, in particular the beginning of the rolling process.

For maximum accuracy of the flatness and the thickness of the rolled product, it is advantageous to connect the temperature of the individual rolls with the control device of the mill stand. Thus, support additional measures to improve quality of the rolled product a temperature of the rolls, wherein further measures are, for example, a displacement ^¬ ben or a change in the axis of rotation of rolls to each other. Further, the tempering of the intermediate rolls, in particular a cooling of the intermediate rolls in the inner region and a heating of the intermediate rolls in the outer region, carried out to improve the flatness. An advantage of the Temperie ^¬ tion of the intermediate rolls is the direct loading of the intermediate rolls with the work rolls. Further advantageous is the temperature of the intermediate rolls, since the intermediate rolls can be tempered very fast compared to the back-up rolls due to their low mass. Further improvements of the above-described measures can be achieved by a simultaneous temperature control of the work rolls of the intermediate rolls and the backup rolls. Particularly advantageous is the tempering of the work rolls and / or the support rolls and / or the intermediate rolls to increase the flatness at the beginning of the rolling process. During the first minutes of the rolling process thermal and mechanical ^¬ African irregularities occur which are offset by Steuerungsmecha ^¬ mechanisms. Due to the compensation mechanisms of thermal and mechatronic nature, a consistently high quality of the rolled product can be achieved even at the beginning of the rolling ^¬ process. The consistently high quality of the rolled product, especially in the early days of the roll ^¬ process, results from the faster and more accurate input Position of the rollers with each other. A targeted cooling and / or heating, in particular in different areas of the individual rollers, support the accuracy of the rolling process and the flatness of the rolled product.

The tempering of the rolls is carried out regularly by Beauf ^¬ beat the rollers with a tempering. The Tempe ^¬ deodorants is thereby applied to the Oberflä ^¬ surface of the corresponding roller by means of a nozzle. The tempering agent is advantageously tempered before and transported by means of leads to the nozzles. Valves are used to control the flow of the tempering through the nozzle. Advantageously, the nozzles, the nozzles associated Venti ^¬ le, their supply lines, and optionally heating elements combined to form a Temperierungsfunktionseinheit. The Tem ^¬ perierungsfunktionseinheit is advantageous to retrofit into an existing rolling mill. If appropriate, temperature sensors for measuring the temperature of the rolls and / or individual regions of the rolls are advantageously part of the tempering functional unit.

An advantageous embodiment of the method is characterized in that the work rolls and the Zwischenwal ^¬ zen, which act on the work rolls, tempered. The method for controlling the temperature of rollers is in particular for a rolling mill comprising two work rolls, wel ^¬ surface are acted upon by in each case one intermediate roll, WO at the intermediate rolls, in turn, are each acted upon by a back-up roll, is advantageous. In this embodiment of the method, both the work ^roll and, if appropriate, independently of one another, the intermediate rolls are tempered. Under a tempering is meant the temperature compensation of the roller with other elements of the roll stand or

Setting a desired temperature of the roller or a delimiting area of the roller. For temperature control, advantageously loading of the rolls with a temperature of or other method of heating or cooling the rollers. A particularly advantageous field of application of the method is the operation of a six-high cold rolling mill of a 6-high rolling mill.

An advantage of the method is the exclusive cooling of the intermediate rolls and the work rolls, wherein the support rollers are not separately tempered. A disadvantage of tempering the back-up rolls is that they require a large amount of tempering agent, since the back-up rolls have a considerably higher diameter and thus considerably more volumes to be cooled than the intermediate rolls and / or the work rolls.

In a further advantageous method, the roller to be tempered is divided into a plurality of regions along the direction of the axis of rotation of the roller, and the temperature control of the individual regions takes place separately. For example, the rollers are divided into an inner and an outer area, wherein the outer areas include the inner area. Further advantageous is a division into a higher number of areas, for example in seven or more areas along the axis of rotation of the roller. The more individual areas of the roller are tempered separately, the ^¬ to more accurate can be responded to deterioration of the flatness by means of the temperature of the rollers. Advantageously, individual areas of individual rolls can be heated separately with Various ^¬ NEN Temperierungsmethoden as applying a Temperierungsmittels and an induction heater. A partial temperature control to different temperature values serves to improve the flatness of the rolled product, whereby a specific heating or cooling of individual areas of the rolls supports the mechatronic adjustment of the position of the rolls. Advantageously, such a classification is performed by a placement of a plurality of nozzles through which a tempering is applied to the individual preparation ^¬ surface of the rolls. Further advantageously, is a method for controlling the temperature of rollers, serving as tempering an organic Lö ^¬ solvents, in particular mineral oil, water, or a Emulsi ^¬ on of water and an organic solvent, and wherein the tempering is applied to the rolls by means of one or more SI ^¬ sen becomes. As the organic solvent medium ^¬ a liquid hydrocarbon, a mixture of hydrocarbons, an alcohol, a petroleum product such as kerosene or a light oil is advantageously used. Further advantageous is a mixture of different petroleum products. Furthermore, water or an emulsion of water and a mineral oil and optionally further additives are advantageous as the tempering ^agent , the additives in particular serving to stabilize the emulsion. In particular for cooling water is particularly well suited, since water has a high Wär ^¬ mekoeffizienten. Although petroleum products regularly have a lower heat coefficient, but are there ^{¬ well} against each other well suited for the lubrication of the rollers. Advantageously, different tempering are used for different rolling stock.

Further advantageous, especially for the treatment of aluminum by a roller, mineral oil is well suited due to its chemical stability. In addition, mineral oil behaves very inert and is therefore well suited to support a Walzpro ^¬ process of chemically reactive metals such as copper or aluminum. The application of the tempering agent is advantageously carried out by means of a nozzle, wherein the nozzle is directed in ei ^¬ nem advantageously variably held distance and in an advantageous variably adjustable direction on the Walzoberflä ^¬ che. The superfluous tempering agent is advantageously collected in the lower region of the roll stand and, after the tempering agent has been brought back to the desired temperature, is returned to the tempering process.

Further advantageous is a method, characterized in that as the other Temperierungsmethode an interaction the roller to be tempered with an electromagnetic field and / or an alternating magnetic field, in particular an induction heating, takes place. Irradiation of the roller with heat radiation for tempering the roller, in particular an intermediate roller, is advantageous for particularly rapid heating of individual areas of the roller. In addition, induction heating can serve a rapid and effective heating of individual areas of the roller. A fast and precisely tuned heating of individual areas advantageously improves the flatness of the rolled product after the rolling process has been completed. Further advantageous is a ^{Induktionsheiz ¬} method or irradiation of a roller with thermal radiation to compensate for areas of different temperature. A compensation of the temperature serves to increase the flatness of the rolls. An improved flatness increases the quality of the rolling stock.

Further advantageous is a method for controlling the temperature of a roller, wherein the temperature control means is tempered before the loading of the rollers. By tempering the temperature control before the action of the rollers, in particular through nozzles, a rapid heating or cooling of individual areas of the roller is possible. A compensation of the temperature of the rolls also serves to increase the life of the rolls, especially at high temperature differences of individual areas or the entire roll. The tempering of the tempering agent is advantageously carried out in a centralized manner or, as a further possible embodiment of the method, shortly before the nozzle, wherein the nozzle is provided for acting on the predetermined area of the roller. Advantageously, the previous temperature of the tempering both faster and more accurate temperature control of the rollers as well as a protection of the rolled material is used, particularly in egg ^¬ nem otherwise high temperature difference between temperature-deodorants and outdoor temperature of the to be tempered roller. In an advantageous embodiment of the device for tempering of rolls, both a temperature control of the two work rolls and a temperature control of the intermediate rolls are provided, wherein the intermediate rolls act on the work rolls. As already explained, there is a ^{vorteilhaf ¬} tes stand from the framework and two work rolls, two intermediate rolls and two support rollers. The intermediate roller beauf beat ^¬ each of a work roll and a backup roll. For the fastest possible and efficient cooling or heating of individual areas of the rolling process beitra ^¬ ing rollers tempering of the work rolls and the intermediate rolls is advantageous because the interaction of the intermediate rolls and the work rolls with the rolling stock is considerably higher than the interaction of the backup rolls and the work rolls with the rolling stock. Under an interaction is understood, for example, a temperature compensation. Moreover, the temperature of the work rolls and the intermediate rolls but not the back-up rolls - advantageous from an economic point of view, since the masses of the back-up rolls are considerably higher than the masses of the work rolls or the masses of the intermediate rolls. By means of such a roll stand can advantageously be a product to be produced, which has a high flatness and a particularly ge ^¬ rings deviation of the thickness.

Also advantageous is a method, wherein a control device controls and / or regulates the temperature control of the areas of the roller. The control device advantageously serves to regulate the temperature of the individual regions of the rolls, in particular the tempered rolls. As an input parameter, the control device receives, for example, the determined flatness of the rolling stock before and / or after the rolling process. By regulating the temperature of the rolls, a region-wise occurring deformation of the roll is selectively achieved in order to improve the flatness of the rolling stock. The control device is also advantageous for controlling the flow rate the tempering through the individual nozzles and ge ^¬ if necessary to control the temperature of the Temper ^¬ means. Next, the control device is used to control the heating elements. In addition, if the nozzles are movable, the controller may control the position and / or orientation of the nozzles.

The control device is advantageously connected to a control system ^¬ of the roll stand and / or the control system of the rolling mill. An integration of the control device to support the further running processes of the rolling mill and / or the roll stand is a particularly preferred embodiment of the method ^¬ . Particularly advantageous is a device described here for a six-high cold rolling mill or a 6-high rolling mill. In a particularly advantageous embodiment, the work rolls and the back-up rolls are tempered. In the following the invention will be described and explained in more detail with reference to the embodiments illustrated in the figures. Show it:

1 shows an arrangement of work rolls and back-up rolls, FIG. 2 shows an arrangement for the tempering of work rolls,

 Intermediate rolls and back-up rolls,

3 shows an arrangement for the temperature control of work rolls and

 Intermediate rolls,

4 shows an arrangement for tempering work rolls,

 Intermediate rolls and back-up rolls with a control device,

 5 shows an arrangement for the temperature control of work rolls and

 Intermediate rolls,

 6 shows a further arrangement for the temperature control of work rolls and intermediate rolls,

7 shows a further arrangement for the tempering of work rolls and intermediate rolls, 8 shows a division of an intermediate ^roll into unterschiedli ^¬ che areas and individual nozzles for temperature control.

1 shows an arrangement of two work rolls 3 and two support rollers 7. The work rolls 3 are arranged between the two support rollers 7, wherein the support rollers 7 act on the work rolls 3 respectively. Between the work rolls 2, the rolling stock 2, wherein the rolling direction is oriented to the rotational direction of the work rolls 3 and the support rollers 7 runs. For tempering the work rolls 3 as well as the support rollers 7 is a Temperierungsfunkti ^¬ onseinheit T. The Temperierungsfunktionseinheit T consists of nozzles 11, from leads of the nozzles 11 and the associated valves 9. The tempering is passed through the supply lines to the nozzles 11 , The nozzles 11 serve to act on the rollers 3, 7 with the tempering agent. The nozzles 11 are located near the respective work roll 3 and / or back-up roll 7. Advantageously, the position of the nozzles 11 in position and orientation is variable. The nozzles 11 are used to act on the support rollers 7 and the work rolls 3 with the temperature control. In this simple embodiment, the supply of tempering, in particular ^¬ for tempering the work rolls 3 and advantageously the cooling and possibly to compensate for the temperatures of the support rollers 7 and the work rolls 3 and to improve the flatness. Instead of nozzles 11, the Temper ^¬ medium can also be by means of a conduit system (not shown) which passes through the rollers 3, 7 or close to the rollers 3, 7, serve to control the temperature of the rollers 3, 7 and / or of the rolling stock. 2

2 shows an arrangement for controlling the temperature of work rolls 3, intermediate rolls 5 and supporting rolls 7 as part of a rolling speed rüsts 1. The rolling stock 2 is beauf beat ^¬ from the work rolls 3 and changed in shape, in particular its thickness by the application of the working rolls 3 , The Ar ^¬ beitswalzen 3 are each supported on an intermediate roll 5 with a backup roll. 7 The support roller is used for on ^¬ acceptance and / or to compensate for the force exerted on the working roller 3 during the deformation of the rolling stock 2 acts. The intermediate roller 5 serves to force transfer of the work rolls 3 to the support rollers 7. Advantageously, both the Arbeitswal ^¬ zen 3 and the intermediate rollers 5 and the support rollers 7 are changeable in their orientation and their position. This is hinted ^¬ tet by the straight arrows on the upper support roller 7. The curved arrows near the center of the rollers 3, 5, 7 indicate a possible direction of rotation of the rollers 3, 5, 7. An adaptation of the position and / or orientation of individual rollers 3, 5, 7 serves the purpose that the flatness of the rolling stock 2 after the passage of the rolling stock 2 through the roll stand 1 meets the requirements. For temperature control of the rollers 3, 5, 7 and optionally of the rolling stock 2 is the Temperierungsfunktionseinheit T. Here, the tempering tion function unit T, the nozzles 11, the nozzles 11 zugeordne ^¬ te valves 9 and the leads on. For tempering the work rolls 3 and the intermediate rolls 5 and the

Support rollers 7 each serve one or more nozzles 11, wel ^¬ che beat the rollers 3, 5, 7 with the tempering. In the immediate vicinity of the nozzles 11 is in each case a valve 9, which adjusts the flow of Temperierungsmit ^{¬ means} through the nozzle 11 and thus the temperature of the ent ^¬ speaking roller 3, 5, 7. As shown, the nozzles 11 and the valves 9 may coincide in one unit. Advantageously, the temperature of the support rollers 7 can also be omitted by the valves 9 of the nozzles 11, which are provided for the loading of the support rollers 7 with the temperature control, be closed. 3 shows an arrangement for the temperature control of work rolls 3 and intermediate rolls 5. Shown here is a Walzge ^¬ scaffold 1, consisting of work rolls 3, intermediate rolls 5 and back-up rolls 7, wherein the work rolls 3 are provided for processing the rolling stock 2, wherein the support rollers 7 and the intermediate rollers 5 are provided for alignment and / or support of the work rolls 3 and wherein the work rolls 3 and the intermediate rolls 5 are tempered by means of a Temperierungsfunkti ^¬ onseinheit T. The temperature control function unit T for the rollers 3, 5 has nozzles 11, for Beaufschla ^¬ tion of the respective roller 3, 5, and the supply lines and valves 9. The embodiment shown has two Ven ^¬ tile 9, wherein the valves 9 advantageously control the flow rate of the tempering through the leads. The upper valves 9 control the temperature of the work rolls 3 and the lower valve 9 controls the temperature of the Zwi ^¬ rule rollers 5. FIG 4 shows an arrangement for the temperature control of work rolls 3, intermediate rolls 5 and back-up rolls 7 with a control device 15 and a valve. 9 here, the control ^¬ device 15 is used to control and / or regulating the temperature of work rolls 3, intermediate rolls 5 and optionally the support rollers 7. the support rollers 7 can advantageously be heated only temporarily. To determine the flatness and / or the dimension of the outgoing rolling stock 2, a scanning unit 13 is used, which determines the flatness of the rolling stock 2 after the rolling process. The flatness is transmitted to a control device 15, the control device 15 instructs the valves 9, to temper the work roll 3, intermediate rolls 5 and / or optionally the support rollers 7 such that the flatness of the rolled material 2 after the rolling ^¬ process requirements equivalent. The nozzles 11 are used to act on the rollers 3, 5, 7 with the tempering agent. The nozzles 11 are supplied with the tempering agent via the supply lines. Temper the medium is advantageous ^¬ tempered when it reaches the valve. 9 One

Flow temperer 10 advantageously serves for targeted heating or cooling of the tempering agent. Instead of a

Durchflusstemperieres 10 can also be a central temperature of the temperature control. Advantageously, the flow temperature adjuster 10 is connected to the control device 15 and supports the improvement of the flatness of the rolling stock 2 after passage of the rolled material 2.

Advantageously, the control device 15 also serves to align and / or position the work rolls 3 and / or A change in the position of the work rolls 3, the intermediate rolls 5 and / or the support rollers 7 is indicated by the arrows in the upper support roller. The arrow in the lower region of the rolling stand symbolizes the flow ^¬ direction of the rolling stock 2 through the rolling stand. 1

5 shows an arrangement for the temperature control of work rolls 3 and intermediate rolls 5. In this embodiment, cleaning nozzles 19 serve to apply lubricant and / or cleaning agents to the rolls 3, 5, 7 and / or by means of the rolls 3, 5, 7 the rolling stock 2. the applied cleaning ^¬ restriction means serves to clean the respective rollers 3, 5, 7, and for example, prevent accumulation of particle not on the rollers 3, 5, 7. Since the rollers 3, 5, 7 pressure afflicted together nestle , even the smallest particles can lead to damage to the rolling stock 2 and / or to the rollers 3, 5, 7 themselves. In order to ensure a better sliding behavior of the rollers 3, 5, 7 with each other, the rollers 3, 5, 7, in particular close to the application between two different rollers 3, 5, 7, lubricated. The lubricant used is advantageously a suitable mineral oil and for cleaning the rollers 3, 5, 7 is either water, an alcohol

and / or a light mineral oil. The device for lubricating and / or cleaning the rollers 3, 5, 7 is advantageously coupled to one another in the device for controlling the temperature of the rollers 3, 5, 7.

Depending on the direction of rotation of the rollers 3, 5, 7 during the rolling process is also a device for acting on the rollers with

Lubricant and / or cleaning agent conceivable, which is on the opposite side of the roll stand 1 as the Ven ^¬ tile 11, so that the lubricant and / or the Rei ^¬ nigungsmittel by the rotating rollers 3, 5, 7 in the space between the two corresponding rollers 3, 5, 7 is introduced and thus distributed evenly. 6 shows a further arrangement for the temperature control of work rolls 3 and intermediate rolls 5, wherein for determining the temperature of the respective work roll 3 and / or intermediate roll 5, a temperature sensor 8 takes place. As a temperature sensor 8 is advantageously a temperature sensor 8, which slides along the surface of the roller 3, 5, 7, a temperature sensor 8, which registers the heat radiation emitted by the roller 3, 5, 7 and / or a temperature sensor 8, in the roller 3, 5, 7 itself is integrated. The temperature values determined by means of the temperature sensor 8 advantageously serve to control the effectiveness of the tempering functional unit T. In particular, overheating of the rollers 3, 5, 7 can be prevented by means of a control of the temperature of the rollers 3, 5, 7. The temperature sensor 8 is advantageously connected to the control device 15 (not shown here) and / or to a flow tempering device 10, wherein the

Flow temperer 10 by means of the temperature of the tempering the temperature of the individual rollers 3, 5, in particular of different areas of the individual rollers 3, 5, controls. Next valves 9 are the individual nozzles 11 to ^¬ ordered. The valves 9 are advantageously controlled directly by the control device 15 (not shown) and / or by means of the temperature sensors 8. The measurement of the temperature of the rollers 3, 5 is effected for example through the integra- tion of the temperature sensor into the rollers 3, 5, 7 itself or a non-contact scanning of the rollers 3, 5, 7 with ^¬ means of a temperature sensor, the heat radiation of the Wal ^¬ zen 3, 5, 7 receives and so determines the temperature of the rollers 3, 5 and / or individual areas of the rollers 3, 5. Next, the figure symbolically shows further cleaning nozzles 19 for acting on the rollers 3, 5, 7 with detergent and / or lubricant.

7 shows a further arrangement for controlling the temperature of work rolls 3 and intermediate rollers 5, the intermediate rollers 5 and the work rolls 3 advantageously one or more have Tem ^¬ temperature sensors in 8, in particular for determining the temperature of individual regions of the intermediate rolls 5 and / or the work rolls 3. In addition to the temperature of the rollers 3, 5, 7 by the application of a Temperierungsmittels is tempered additionally or alternatively by means of a heat source 17. Depending on the field of application, a temperature measurement in / on the rollers 3, 5, 7 can also be dispensed with or the temperature of the rolling stock 2 itself can be determined , A determination of the temperature of the roll good example, with a thermal camera or with another Tem perature sensor ^¬ 8 outside of the roll stand 1. In a particular ^¬ DERS advantageous embodiment, the temperature of the rolls is not measured but calculated. FIG 8 shows an arrangement of an intermediate roll 5 in under ^¬ schiedliche areas and individual nozzles 11 for the tempering. Advantageously, the nozzles 11 are adjustable by means of an associated Ven ^¬ tils 9 that individual areas are tempered differently by the on ^¬ wear of tempering of different flow rates. In this embodiment, all the nozzles 11 are connected to a source of Tempe ^¬ rierungsmittels, wherein the different areas is controlled by controlling of the individual valves 9, which is associated with each nozzle 11 is advantageous. The arrangement shown is advantageous also for the working ^¬ rollers 3 and / or the support rollers 7 applicable. The number of nozzles is advantageously determined by the length of the roller 3, 5, 7 to be tempe ^¬ ing, wherein a region which is heated with a nozzle, has a width of 1 cm to 5 cm.

Further, the nozzles 11 may have a plurality of holes, wherein the tempering agent is applied in different ^¬ direction on the rollers 3, 5, 7 through each of the holes. Advantageously, a nozzle 11 has a valve 9, wherein the valve 9 is temporarily opened. Through the duration of ge ^¬ opened valve 9 in relation to the duration of the closed valve 9 results in the volume of the discharged Temperie- at an advantageously constant flow rate of the tempering agent through the nozzle 11th

In summary, the invention relates to a method and a device for tempering of rolls 3, 5, 7, in particular of the rolls 3, 5, 7 of a roll stand 1. The roll stand 1 basically has work rolls 3, support rolls 7 and optionally at least one intermediate roll 5, wherein the intermediate rollers 5 are advantageously located between the work rolls 3 and the support rollers 7. For controlling the temperature of the rollers 3, 5, 7, the rolls 3, 5, 7 are acted on by a tempering agent and / or a heat source 17. It is provided that both the work rolls 3 and at least one of the intermediate rolls 5 and / or optionally at least one of the support rollers 7 are tempered. Due to the temperature of work rolls 3 and intermediate rolls 5 in particular a rapid temperature adjustment of Walzpro ^¬ fils to the profile of the rolling stock 2, in particular in the field of material processing, possible. This leads to an improvement in the flatness of the rolling stock 2 after the rolling process.

Claims

claims 1. A method for tempering rolls (3, 5, 7), in particular of the rollers (3, 5, 7) of a roll stand (1), wherein the roll stand (1) work rolls (3), support rollers (7) Min ^¬ least comprising an intermediate roll (5), wherein for controlling the temperature of the rolls (3, 5, 7) acting upon the rolls (3, 5, 7) is provided with a tempering and / or other Tempe ^¬ rierungsmethode, That is, both the work rolls (3) and at least one of the intermediate rolls (5) and / or at least one of the back-up rolls (7) are tempered. 2. The method according to claim 1, characterized in that the Ar ^¬ beitswalzen (3) and the intermediate rolls (5) which act on the working rolls (3) be tempered. 3. The method according to any one of the preceding claims, That is, the roller to be tempered (3, 5, 7) is divided into a plurality of regions along the axis of rotation of the roller (3, 5, 7) and that the temperature control of the individual regions takes place separately. 4. The method according to any one of the preceding claims, characterized in that an organic solvent insbeson ^¬ particular serves as a tempering a mineral oil, water, or an emulsion of water and an organic solvent and that the Temperie ^¬ agent is applied by means of one or more nozzles onto the rolls (3, 5, 7). 5. The method according to any one of the preceding claims, characterized in that as other Temperierungsmethode an interaction of the system to ^¬ perierenden roll with an electromagnetic field and / or an induction heating method. 6. The method according to any one of the preceding claims, d a d u r c h e c e n c i n e s that Tempering agent before the application of the rolls 7) is tempered. 7. The method according to any one of the preceding claims, characterized in that the ei ^¬ ne control device (15) controls the temperature of the areas of the roller (3, 5, 7) and / or regulates. 8. Device for tempering rolls (3, 5, 7), in particular of rolls (3, 5, 7) of a roll stand (1), the apparatus being work rolls (3), intermediate rolls (7) and support rolls (7) and a tempering functional unit (T), the intermediate ^roll (5) being acted upon by the work roll (3) and by the support roll (7), That is, the temperature control function unit (T) is provided both for tempering the work rolls (3) and at least one intermediate roll (5) and / or at least one support roll (7). 9. Apparatus according to claim 7, That is, both the work rolls (3) and the intermediate rolls (5), which act on the work rolls (3), are provided for tempering by means of the tempering functional unit (T). 10. rolling stand (1), in particular as part of a Kaltwalzwer ^¬ kes, comprising a device according to claim 8 or 9. 11. rolling mill, in particular a six-high cold rolling mill, comprising a rolling stand (1) according to claim 10.