DE102018203638A1 - Method for operating a roller leveler and roller leveler - Google Patents

Abstract

The invention relates to a method for operating a roller leveler (1), wherein the roller leveler (1) comprises a number of forming tools (2, 3, 4, 5), wherein the forming tools (2, 3, 4, 5) at least one set of upper ( 2) and lower (3) leveling rolls, wherein between the upper and lower straightening rolls (2, 3) to be straightened metallic sheet (6) in a conveying direction (F) is promoted. In order to achieve a high straightening quality even when wear occurs, the invention provides that the method comprises the steps of: a) determining the state of wear of at least one of the forming tools (2, 3, 4, 5); b) determining a correction value and / or a compensation value for the operation of the forming tool (2, 3, 4, 5) due to the determined state of wear of the same; c) adaptation of an operating parameter, in particular a setting parameter or setting value, for the forming tool (2, 3, 4, 5) on the basis of the determined correction value and / or compensation value. Furthermore, the invention relates to a roller leveler.

Description

The invention relates to a method for operating a roller leveler, wherein the roller leveler comprises a number of forming tools, wherein the forming tools comprise at least one set of upper and lower straightening rolls, wherein between the upper and lower straightening rolls to be straightened metallic sheet is conveyed in a conveying direction. Furthermore, the invention relates to a roller leveler.

A generic roller leveler is from the EP 0 551 658 B1 known. In this solution, it is provided that individual straightening rollers are targeted to realize the required position of the rollers for the straightening process.

Furthermore, for example, from the DE 10 2013 207 307 A1 and from the WO 2017/32652 A1 Straightening machines with different roller diameters known. Individually adjustable straightening rollers are out of the WO 2017/013099 A1 known. The DE 1 930 349 A1 discloses a single drive for the rolls of a leveler.

In practice, straightening machines are used in the majority of cases, which usually have no individually adjustable straightening rolls or only one individually adjustable inlet and outlet straightening rolls. The adjustment of the straightening rollers is done together by hiring the frame in which the straightening rollers are installed. For targeted employment of the machine, the built-up straightening and support rollers as built in the machine tools, even in the aforementioned prior art solution, all have the same diameter.

It is precisely these practice-known prior art straightening machines that for the most part provide a group drive for the straightening rollers. The straightening rollers of a group must therefore all have the same bale diameter, so that set uniform velocities and build up no uncontrollable tension in the drive train.

This can lead to disadvantageous that tools with little wear or even new tools must first be processed so that they can be installed with the most worn tool in a set of rollers.

The different state of wear of straightening rollers, support rollers and beyond also of Anstellelementen the technological regulations has an adverse effect even with individually driven and / or adjustable straightening rollers. Wear causes deviations in the speed, the immersion depth and / or the bending of the straightening rollers, so that the straightening task, d. H. the removal of flatness defects is achieved only with loss of quality in the sheet metal or strip.

Wear occurs on the straightening and backing rolls by the production plant itself and can falsify the original cylindrical contour of the rolls.

However, wear must also be taken into account when using reworked rollers, as these have a cylindrical contour, but with a smaller diameter.

In addition, wear and tear of the roller bearings on immersion depth and flexing are observed, affecting the accuracy and thus the effectiveness of these actuators.

The invention is therefore based on the object, a method of the type mentioned in such a way that even with ongoing wear of the tools, a high straightening quality can be achieved without affecting the performance of the straightening machine.

1. a) Ermitteln des Verschleißzustands mindestens eines der Umformwerkzeuge;
2. b) Ermitteln eines Korrekturwertes und/oder eines Ausgleichwertes für den Betrieb des Umformwerkzeugs aufgrund des ermittelten Verschleißzustands desselben;
3. c) Anpassung eines Betriebsparameters, insbesondere eines Anstellparameters oder Setzwertes, für das Umformwerkzeug unter Zugrundelegung des ermittelten Korrekturwertes und/oder Ausgleichwertes.

The solution of this problem by the invention is characterized in that the method comprises the steps:

1. a) determining the state of wear of at least one of the forming tools;
2. b) determining a correction value and / or a compensation value for the operation of the forming tool due to the determined state of wear of the same;
3. c) adaptation of an operating parameter, in particular a setting parameter or setting value, for the forming tool on the basis of the determined correction value and / or compensation value.

The at least one forming tool can preferably be a straightening roller, a support roller and / or a positioning system for the straightening roller.

Determining the state of wear of at least one of the forming tools according to step a) above can be or include a manual wear measurement of the forming tool with subsequent input of the measured value into a machine control.

Alternatively, it is also possible that the determination of the state of wear of at least one of the forming tools according to step a) above is or includes an automatically performed measuring process and an automated comparison with a desired value.

A further alternative solution for this purpose provides that the determination of the state of wear of at least one of the forming tools according to the above step a) is or comprises determining the wear due to a given empirical wear behavior of the forming tool.

Finally, it can alternatively be provided that the determination of the state of wear of at least one of the forming tools according to step a) above is carried out by a calibration process of the roller straightening machine, wherein data determined during calibration are compared with data from a previously performed calibration procedure and thereby concluded that wear occurred in the meantime ,

The determination of a correction value and / or a compensation value for the operation of the forming tool according to the above step b) can be done on the basis of a simulation calculation based on a simulation model of the roller leveler.

Alternatively, it can be provided that the determination of a correction value and / or a compensation value for the operation of the forming tool according to the above step b) takes place on the basis of a predetermined characteristic, which in particular specifies the state of wear over time.

The adaptation of an operating parameter for the forming tool according to the above step c) may be or include the adjustment of the speed of a straightening roller and / or the setting position of the straightening roller and / or the changes of a discontinued bending moment for the bending compensation.

The proposed roller leveler with a number of forming tools, wherein the forming tools comprise at least one set of upper and lower straightening rollers, wherein between the upper and lower straightening rollers to be straightened metallic flat material can be conveyed in a conveying direction, according to the invention provides that the roller straightening means for detecting wear at least having one of the forming tools and means for compensating the determined wear on the forming tools.

For the control of the means for compensating the determined wear on the forming tools, a machine control is preferably present.

The means for detecting wear may be or comprise measuring means for detecting the force, the pressure, the drive torque and / or the path.

The means for compensating for the determined wear can be or comprise a bending system for the straightening rolls and / or a setting system for the straightening rolls.

The means for compensating the determined wear may include a technological model of the roller leveler.

It is possible to associate the determined wear type with a preferred tool function. Furthermore, a collision check for the operation of the machine functionality within permissible working positions can take place.

The invention makes it possible to provide at the same time the use of worn and unworn tools in the straightening machine without sacrificing the quality of the straightening process.

The means for compensating for wear can be individual drives of the straightening rollers for correcting speed or torque, optionally with load balancing control.

The forming tools are to be understood generally as driven straightening rollers, which perform the actual forming work, support rollers or support rollers for the straightening rollers with appropriate storage, bending systems in the form of individual Anstellsysteme for adjusting the Richtspaltkontur on the straightening rolls in loaded and unloaded condition and Anstellsysteme for setting Immersion depths of individual rollers in loaded and unloaded condition.

Different types of wear can be taken into account: First, local or surface changes to the roll or roller bale are possible, d. H. a change over the longitudinal extent of the roller or roller. Furthermore, surface wear on sliding surfaces is possible. In addition to ground leveling rolls or support rollers with local signs of wear, completely worn bales can also occur; the roller has then changed overall in diameter.

When setting the Rollenrichtmaschine it is the setting of operating parameters of the leveler for performing a straightening process. Each straightening roller receives individual setting parameters for the adjustable tools.

It can be provided that an adjustment of the rotational speed of the straightening roller over time after a predetermined and stored in the machine control relationship. In this case, it is provided in particular that the relationship stored in the machine control is determined by observing the wear state of the straightening roller over time, logging it and defining it numerically or as a formulaic relationship. The relationship stored in the machine control can alternatively or additionally also be determined on the basis of a theoretical calculation, wherein the parameters influencing the wear of the straightening roll are taken into account in a simulation model, in particular the guide stitch count, the drive torque of the straightening roll, the straightening force, the static friction coefficient and / or the tinder accumulation.

The proposed solution accordingly provides a method for wear compensation in straightening machines available, which can be used in particular when straightening metallic flat material, such as sheets, sheet metal, plates and their parts and bands. It is particularly suitable for straightening steel sheets or strips.

In particular, a straightening machine with individually driven straightening rolls and with individual adjustable straightening rolls is used.

With the method, the wear of the straightening tools, d. H. the straightening and backing rolls, a straightening machine are compensated to maintain a constant straightening quality over the cycle of use of said tools.

Thus, it becomes possible to use in combination both new and worn, but also due to wear or damage prepared (abraded) straightening and support rollers in a set of rollers while maintaining the performance of the machine by compensating for wear and tear.

Due to the proposed solution, complex flatness errors in the material to be straightened can be optimally directed by means of the straightening machine independently of the influence of the tool wear.

Thus, the simultaneous use of worn, worn and new tools in a set of rolls is made possible.

By means of the individual drives and the individual adjustment of the straightening rollers straightening and support rollers can be operated with different state of wear and Abschliffzustand simultaneously in a straightening machine in a set of rollers, since the height and rotational speed of each straightening roller depending on the state and can be set. The same applies to the exhibition of the straightening roller, as well as the bending of the straightening roller.

It is possible to determine the state of wear of components on the basis of a deviating machine calibration for the respective previous machine calibration.

It is also possible to provide for automatic learning of the time-consuming state of wear of components of the machine as a result of the determination by the calibration of machine calibration to machine calibration mentioned above.

Determining the state of wear of components is possible on the basis of a theoretical calculation (eg, number of infeed points, drive torque, straightening force, static friction coefficient, scale attack).

Furthermore, it is also possible to determine the state of wear of components on the basis of the deviation of the calculated setpoint specifications (SETUP) with regard to the straightening force, the torque and the springback to measured actual values.

In this case, as mentioned, a technological model for calculating and controlling the functional units of the machine are used (main employment including tilting and pivoting to influence various flatness errors, bending, strain and compression compensation, Einzelrichtwalzenanstellung, drive torques), especially taking into account the state of wear of the tools ,

Furthermore, the wear of the tools of the leveler (wear of the straightening rollers and the support apparatus of the support rollers) can be compensated on the basis of a wear model.

It is possible to preset the state of wear of components for technological automation by the operator.

In an advantageous manner, the drive torques for the optimized lifetime utilization and distribution of the wear behavior of components can be distributed in a targeted manner via the individual drives.

Via a drive torque control, the threading of the material to be straightened can be optimized. As a result, the risk of markings of the impact of the material head on the straightening roller and thus also the risk that a damaged area (macke) is impressed on the straightening roller bales in the material surface and the surface quality of the product is thereby adversely affected.

In an advantageous manner, it is not necessary to ground down all or at least some leveling rolls to be incorporated into a leveling roll set to a uniform directional roll diameter.

Furthermore, it is not necessary to inexpensively sand all or at least some of the back-up rolls to be installed in a leveling roll set to a uniform back-up roll diameter in an advantageous manner.

Finally, it is advantageous that not all consuming to be incorporated in a leveling set backup rolls must be supported in order to raise all leveling rolls of uniform diameter to a corresponding leveling roll mirror height.

• 1 zeigt ein Umformwerkzeug einer Rollenrichtmaschine, gesehen in Förderrichtung des zu richtenden Guts, wobei ein lokaler Verschleißzustand der Richtwalze übertrieben dargestellt ist,
• 2 zeigt in der Darstellung gemäß 1, wie prinzipiell und übertrieben dargestellt der Verschleiß der Richtwalze ausgeglichen wird, und
• 3 zeigt schematisch eine Rollenrichtmaschine in der Seitenansicht.

In the drawings, embodiments of the invention are shown.

• 1 shows a forming tool of a roller straightening machine, as seen in the conveying direction of the material to be strained, wherein a local state of wear of the straightening roller is exaggerated,
• 2 shows in the illustration according to 1 how the wear of the straightening roller is compensated in principle and exaggerated, and
• 3 schematically shows a roller leveler in the side view.

In 1 is schematically a straightening roller (it may be an upper straightening roller 2 or a lower straightening roller 3 act) of a roller straightening machine 1 outlined. The straightening roller 2 . 3 is supported in operation, including along the axial extent thereof a number of support rollers 4 is arranged. The support rollers 4 be from a support roller bearing 11 held. On the support roller bearing 11 acts a bending system 8th with several bending cylinders. These exercise on the support roller bearing 11 a defined bending moment, so that the support roller bearing 11 including support rollers 4 bends. This deflection is in 2 presented in a greatly exaggerated way.

How out 1 it can be seen is by means of the straightening roller 2 . 3 a metallic flat material 6 (Steel strip) directed, including the straightening roller 2 . 3 with defined torque and defined speed by a drive 10 is driven. The flat material 6 is doing in the conveying direction F promoted. The size of the straightening force of the straightening roller 2 . 3 on the flat material 6 is exercised depends essentially on the corresponding delivery of the straightening roller 2 . 3 which in turn is due to the bending system 8th is accomplished.

In 1 you can see that the straightening roller 2 . 3 a local wear area 9 which would lead to a faulty straightening process. As a result of local deterioration is in the middle of the straightening roller 2 . 3 the diameter of an original value D to a reduced value d dropped.

From the synopsis of 1 and 2 goes - greatly exaggerated in 2 shown - shows that by appropriate control of the bending system 8th on the straightening roller 2 . 3 such a bending force is exerted that it is in the region of contact with the flat material 6 largely cylindrical rests on this.

For this purpose (s. 2 ) a machine control 7 provided that a correction value determination 13 includes. With the machine control 7 communicates with a store 12 for wear values.

In 3 is schematically the roller straightening machines 1 to see in the side view, it can be seen that each of the upper straightening rollers 2 or the lower straightening rollers 3 each with a positioning system 5 which is the straightening rollers 2 . 3 on the flat material 6 delivered.

You can say the following:

1 shows an upper straightening roller 2 with the diameter D in contact with the material to be straightened 6 stands. The straightening roller 2 is by a number of support rollers 4 supported (in other designs, the straightening roller is supported by only a single support roller - also called a support roller - both are covered by the present invention). A bending system consisting of several bending cylinders 8th acts on the support rollers 4 on the bale of the straightening roller 2 and so can the deflection of the straightening roller 2 adjust over the bale length. In addition, every straightening roller 2 in total by a in 1 Not shown Anstellsystem (this is in 3 with the reference number 5 designated) adjustable in their immersion depth.

Shows a straightening roller 2 . 3 Areas with local signs of wear 9 in which the diameter is at the smaller value d is reduced, the forming task can not be performed correctly in these areas, since the contact forces differ locally. The stretch of the band segment is incomplete.

This shows 2 the mode of action of the proposed solution with the same configuration as in 1 :

By suitable control, in this case the bending cylinder of the bending system 8th , it becomes clear that the effect of local signs of wear 9 is compensated such that the contact between straightening roller 2 and to judging material 6 is even. The bending cylinder of the bending system 8 thus act as a means for wear compensation. The corresponding signals are from the machine control 7 to the bending cylinder of the bending system 8th transmitted, with the local wear of the straightening roller 2 is taken into account.

3 shows a further mode of action of the proposed idea when in another perspective schematically a set of upper and lower straightening rollers 2 . 3 is shown, which is engaged with the material to be straightened 6 are located. In each case an upper and a lower straightening roller 2 . 3 is significantly abraded, resulting in the reduced diameter d is marked opposite to the original diameter D. Every straightening roller 2 . 3 has its own drive 10 (S. 1 ), over which the speed and the torque are controlled. Every straightening roller 2 . 3 has its own employment to adjust the immersion depth - thus the complete vertical adjustment - independently of the bending over the roll bales. On the representation of the support rollers and bending cylinder was in 3 omitted for the sake of simplicity.

The schematic diagram shows that the worn control rolls the machine control 7 the employment positioned such that a necessary for the straightening immersion depth is achieved, even if there is wear. This is achieved by increasing the setting stroke by the wear value - in this case the diameter difference.

Accordingly, for the worn straightening rollers, the drive specifications with respect to torque and / or speed by the machine control 7 corrected so that the smaller roll diameter is compensated. The straightening task can be carried out optimally. The adjustment and the individual drive act as a means of compensating for wear, whose adjustment values / setting values have been corrected.

The proposed concept initially serves to set the plant before carrying out a straightening process.

First of all, the wear state of the tools must be determined by means of suitable procedures. Subsequently, the necessary correction value or a compensation parameter is calculated which results in a new setting parameter / setting value which is changed in comparison with the unworn tool. The machine control 7 passes on the corrected setting parameters to the individual tools so that their operating parameters, the so-called tool functions, are set. The arithmetic unit for determining correction values and the machine control can be separate units (see 3 ), but they can also be integrated into a common entity (see 2 ).

The unworn tools receive a correction value of "zero", i. H. the originally planned composition will not be corrected. The basic procedure for setting the Rollenrichtmaschine will not be discussed here, since this is well known in the art.

The central objective here is rather to solve the problem of wear and its integration into the plant composition.

By correcting the setting of worn tools compared to unworn tools, worn and unworn tools can be used in a straightening machine at the same time without sacrificing the quality of the straightening process.

There are various possibilities for wear detection available. Wear detection can be performed manually after manual measurement by the operator. One possible automated process step of determining wear consists of determining the wear by means of a setpoint / actual value comparison of process setpoints to measured process actual values and from the conclusion on wear. In this case, deviating values of straightening force, torque, springing etc. can be used. The measurement can be carried out in the form of distance measuring, force measuring and / or pressure measuring systems with appropriate built-in straightening sensor. Thus, in the context of torque measurements during a straightening process conclusions about the state of wear of a straightening roller can be drawn, which are taken into account during the setting for the following straightening process.

Another possible automated method step for determining wear can be carried out in the form of an empirical determination of wear values. In addition, the determination of the wear can be made via a plant calibration by comparing the results of a performed plant calibration with the results of one or more previous plant calibrations.

The determination / calculation of the correction values is carried out in a separate calculation unit or directly by the machine control 7 performed. This depends on the detailed configuration of the plant automation and plant control. The calculation of the correction values is preferably carried out by a technological straightening machine model which determines the setting values (also Employment) and the wear-related correction values for settlement. A long-term and / or short-term adaptation of the straightening machine model taking into account the wear parameters represents a further improvement. This can take place in the form of a separate wear model independently of the straightening machine model or the straightening machine model has an implemented wear model.

The machine control 7 takes the setting of the plant, so the targeted transmission of operating positions and operating values to the respective tools.

For example, a straightening roller 2 . 3 used with consistently smaller diameter in the leveler (see 3 ), the diameter deviation from the setpoint must be recorded in a first step. Subsequently, the straightening process is calculated with the corrected diameter value, so that the necessary setting parameters, including the special correction values, result.

The machine control 7 forwards the corresponding setting parameters / setting values to the tool functions. Thus, in the example of the worn straightening roller (see 3 ) both the immersion depth by the employment of the straightening roller 2 . 3 set with a corrected Anstellparameter as well as a corrected Anstellparameter for the speed and / or the torque of the roller drive.

The wear forms are assigned a preferred correction of a tool function. Preferably, wear over the entire straightening roller bales is corrected by adjusting the straightening roller and its rotational speed, local wear of straightening rollers corrected by the bending cylinder and the straightening roller speed, wear of support rollers corrected by the adjustment and / or the bending cylinder. Further combinations are possible.

To the tool parameters in terms of wear within the roller leveler 1 targeted compensate, the roller leveler on means for wear detection, z. B. in the form of the above-mentioned sensors. It also has the means for compensating for wear. These means for compensation preferably consist of a combination of single-roll jobs - ie the ability to individually adjust each straightening roller in their depth of immersion - in conjunction with single-roller drive (ie an individual drive train with adjustable speed and torque).

Furthermore, a bending system for each straightening roller is provided with which the contour of the straightening roller can be influenced to local wear (see the reference numeral 9 in 1 ) to correct specifically.

Another feature for improving the straightening result, taking into account wear parameters, is the load balancing control of the individual adjacent straightening roller drives. Thus, unwanted torque distortions or speed distortions are compensated.

These respective features (individual employment, bending, single drive) are known as such, however, their use is here extended to the task of wear correction.

LIST OF REFERENCE NUMBERS

1

Roller straightener

2, 3, 4, 5

forming tool

2

upper straightening roller

3

lower straightening roller

4

supporting role

5

adjustment system

6

to be straightened metallic sheet

7

machine control

8th

bending system

9

local wear area

10

drive

11

Support roller bearing

12

Memory for wear values

13

Correction value determination

D

Diameter of straightening roller (nominal value)

d

Diameter of straightening roller (reduced value due to wear)

F

conveying direction

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 0551658 B1 [0002]
• DE 102013207307 A1 [0003]
• WO 2017/32652 A1 [0003]
• WO 2017/013099 A1 [0003]
• DE 1930349 A1 [0003]

Claims (14)

Method for operating a roller leveler (1), wherein the roller leveler (1) comprises a number of forming tools (2, 3, 4, 5), wherein the forming tools (2, 3, 4, 5) at least one set of upper (2) and lower (3) straightening rollers, wherein between the upper and lower straightening rollers (2, 3) a metallic sheet (6) to be straightened is conveyed in a conveying direction (F), characterized in that the method comprises the steps of: a) determining the state of wear at least one of the forming tools (2, 3, 4, 5); b) determining a correction value and / or a compensation value for the operation of the forming tool (2, 3, 4, 5) due to the determined state of wear of the same; c) adaptation of an operating parameter, in particular a setting parameter or setting value, for the forming tool (2, 3, 4, 5) on the basis of the determined correction value and / or compensation value. Method according to Claim 1 , Characterized in that the at least one forming tool (2, 3, 4, 5) comprises a straightening roll (2, 3), a support roller (4) and / or an adjustment system (5) for the straightening roll (2, 3). Method according to Claim 1 or 2 , characterized in that the determination of the state of wear of at least one of the forming tools (2, 3, 4, 5) according to step a) of Claim 1 a manual wear measurement of the forming tool (2, 3, 4, 5) with subsequent input of the measured value in a machine control (7) is or includes. Method according to Claim 1 or 2 , characterized in that the determination of the state of wear of at least one of the forming tools (2, 3, 4, 5) according to step a) of Claim 1 an automatically performed measurement process and an automated comparison with a target value is or includes such. Method according to Claim 1 or 2 , characterized in that the determination of the state of wear of at least one of the forming tools (2, 3, 4, 5) according to step a) of Claim 1 a determination of the wear due to a given empirical wear behavior of the forming tool (2, 3, 4, 5) is or comprises. Method according to Claim 1 or 2 , characterized in that the determination of the state of wear of at least one of the forming tools (2, 3, 4, 5) according to step a) of Claim 1 by a calibration process of the roller leveling machine (1), wherein data determined during the calibration are compared with data of a previously performed calibration procedure and thereby concluded on intermittent wear. Method according to one of Claims 1 to 6 , characterized in that the determination of a correction value and / or a compensation value for the operation of the forming tool (2, 3, 4, 5) according to step b) of Claim 1 based on a simulation calculation based on a simulation model of the roller leveler (1). Method according to one of Claims 1 to 6 , characterized in that the determination of a correction value and / or a compensation value for the operation of the forming tool (2, 3, 4, 5) according to step b) of Claim 1 takes place on the basis of a predetermined characteristic, which specifies in particular the state of wear over time. Method according to one of Claims 1 to 8th , characterized in that the adaptation of an operating parameter for the forming tool (2, 3, 4, 5) according to step c) of Claim 1 the adjustment of the rotational speed of a straightening roller (2, 3) and / or the setting position of the straightening roller (2, 3) and / or the changes of a discontinued bending moment for a bending compensation is or comprises. Roller leveling machine (1) with a number of forming tools (2, 3, 4, 5), wherein the forming tools (2, 3, 4, 5) comprise at least one set of upper (2) and lower (3) straightening rolls, wherein between the upper and a straightening metallic flat material (6), in particular a steel strip, in a conveying direction (F) can be promoted, characterized in that the roller straightening machine (1) means for detecting wear of at least one of the forming tools (2, 3 , 4, 5) and means for compensating the determined wear on the forming tools (2, 3, 4, 5). Roller straightening machine after Claim 10 , characterized in that for the control of the means for compensating the determined wear on the forming tools (2, 3, 4, 5) a machine control (7) is present. Roller straightening machine after Claim 10 or 11 , characterized in that the means for detecting wear are or comprise measuring means for detecting the force, the pressure, the drive torque and / or the path. Roller straightening machine according to one of Claims 10 to 12 , characterized in that the means for compensating the determined wear a bending system for the straightening rollers (2, 3) and / or a positioning system for the leveling rolls (2, 3) are or include. Roller straightening machine according to one of Claims 10 to 13 , characterized in that the means for compensating for the determined wear comprises a technological model of the roller leveler.

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