EP2691188A1 - Operating method for a rolling train - Google Patents

Abstract

A control computer (3) for a rolling train is supplied with prescribed stand parameters of a rolling stand (2) of the rolling train. As part of a rolling schedule calculation, the control computer (3) sets variables (F, dF, G, ds, V) describing a rolling pass of the rolling stand (2) that together with initial data (b, d, T) of a flat piece (1) to be rolled and the stand data describe the resultant roll nip and the asymmetry thereof. The initial data (b, d, T) comprise at least the width (b), the average thickness (d) and the average strength of the piece (1) to be rolled. In the rolling schedule calculation, the control computer (3) determines on the basis of the initial data (b, d, T), the stand data and the set variables (F, dF, G, ds, V) an expected delivery taper (K) and/or an expected strip sabre (K') for the piece (1) to be rolled. In accordance with a prescribed taper strategy externally supplied to the control computer (3), the control computer (3) varies at least one of the set variables (F, dF, G, ds, V), in order to bring the determined delivery taper (K) at least close to a desired delivery taper and/or bring the strip sabre (K') at least close to a desired strip sabre. The control computer (3) transfers the varied variables (F, dF, G, ds, V) that have been determined to a basic automation system (8) of the rolling stand (2), and so the piece (1) to be rolled is rolled in the rolling stand (2) in accordance with the varied variables (F, dF, G, ds, V).

Description

description

Operating method for a rolling mill, the present invention relates to an operating method for a rolling mill for rolling a rolled flat in Minim ^¬ least one roll stand of the roll train,

wherein a control computer for the rolling mill scaffold parame ^¬ ter of the mill stand descriptive framework data are given,

 wherein the control computer, as part of a stitch plan calculation, sets the variables describing the rolling of the flat rolling stock in the mill stand,

 the set sizes, in conjunction with the starting data describing the flat rolling stock before rolling in the rolling stand, and the stand data of the rolling stand, describe the rolling gap and its asymmetry which results during rolling of the flat rolled stock in the roll stand,

- wherein the initial data, at least for the width of which include average thickness and the average strength of the flat Walzgu ^¬ tes characteristic quantities,

- In the context of Stichplanberechnung - the control computer based on the initial data, the framework data and the attached sizes by means of a wedge model determines a discharge wedge and / or a saber, he ^¬ waiting for the flat rolling stock, when the flat rolling in the rolling mill with the attached sizes is rolled.

The present invention further relates to a computer program, the machine comprises code is UNMIT ^¬ telbar processable by a control computer for a rolling mill for rolling a flat rolled material and its processing effected by the control computer, the control computer the rolling mill ge ^¬ Mäss such an operating procedure operates.

The present invention further relates to a control computer for a rolling mill for rolling a flat Walzgu ^¬ tes, wherein the control computer is designed such that it operates the mill train according to such an operating method.

The present invention further relates to a rolling mill for rolling a flat rolled stock, which is equipped with such a control computer.

Such objects are for example from the

WO 2006/063 948 AI known.

In the known operating method, the estimated sizes, in conjunction with the initial rolling data describing the flat rolling stock before rolling in the rolling stand, and the stand data of the rolling stand, describe the rolling gap resulting from rolling the flat rolled stock in the rolling stand. The ^{Steurech ¬} ner determined in the stitch plan calculation based on the initial data, the framework data and the estimated sizes by means of a model expected sizes that are expected for the flat rolling ^¬ well when the flat rolling is rolled in the rolling stand with the sizes set. The control computer varies in the context of Stichplanberechnung according to a strategy at least one of the scheduled sizes, so that the he ^¬ averaged expected sizes are at least approximated the end sizes. The control computer transfers the variables determined within the stitch plan to a basic automation of the rolling stand, so that the flat rolling stock is rolled in the roll stand according to the varied sizes.

From DE 10 2009 043 400 AI a concept for the model-based determination of actuator setpoint values for a hot strip mill with multiple rolling stands is known. In this concept when running the actuator setpoints a ge ^¬ wished target contour of the nips of the stands is adjustable. In a first process step of this concept, a target Geschwindigkeitskeiligkeit of the hot strip is set after each Ge ^¬ Rüst. In the second step, values for strip thickness contours at the outlets of the frameworks are determined with the aid of flatness models. In the third step will be determined by means of material flow models for each frame applied rolling force distributions. In the fourth step, the target contour for the tape drive operators is determined. In the fifth step, the actuator setpoints are calculated from the target ^¬ contour for each stand by means of an optimization method.

The method described in DE 10 2009 043 400 A1 is used while the flat rolling stock passes through a multi-stand rolling mill. For carrying out the process, both the inlet side and outlet side measured variables ^¬ KISSING all rolling mills involved needed.

DE 10 2009 043 401 A1 discloses an identically stored disclosure content.

In the rolling of metal, the shape of the rolled material from the beginning of the process at all intermediate steps of time is a more ^¬ term size. In addition to thickness, width, profile and flatness, the wedges (ie the asymmetrical portion of the thickness across the width of the flat rolled stock) and the saberiness (ie the curvature of the flat rolled stock in the rolling plane) are also important parameters. Both a wedge and a saber are undesirable because these quantities (if they are different from 0) make it difficult to further process steps and around ^¬ stands under make impossible or lead to waste.

Due to the conservation of material, the wedging and the saberiness are still closely linked. Runs, for example, a one-sided cold slab in the rolling stand, so due to the unilaterally higher rolling force and the associated unilaterally higher springing of the rolling mill, the colder side is less strongly rolled than the heat ^¬ re side, unless otherwise controlled. As a result, a thickness wedge and a saber corresponding thereto are formed. However, running an already keiliges fla ^¬ ches rolling in the rolling mill and is the thick wedge When rolling the flat rolled material eliminated, so a saber is generated by the rolling.

If the flat rolling stock already has a thickness wedge, in the prior art often the upper set of rolls and the lower set of rolls are pivoted against each other, so that during the rolling pass the relative wedge is retained and consequently no curvature (= saber) is generated. The pivot Ver ^¬ is performed manually by an operator due to the observation of the rolling stock. There are also methods for automatic support of the operator known to anticipate these manual interventions or at least ^¬ should reduce. These methods are based on measurements of differential rolling forces and regulations, ie they are carried out within the framework of basic automation.

For wedge slabs, ie slabs which have a thickness wedge, methods are still known which eliminate the wedge by imposing asymmetric Zugverteilungen, but at the same time prevent the formation of a saber. This is because by ^¬ achieved that a cross-flow is caused in the material.

It is difficult or even impossible to determine only from the rolling load signal a setpoint for a correction member, by means of which the run-out wedge is influenced correctly.

The object of the present invention is to provide possibilities by means of which an outlet wedge and / or an outgoing saber can be specifically predicted and adjusted in a flexible manner.

The object is achieved by an operating method for a rolling train with the features of claim 1. Advantageous embodiments of the operating method are the subject of the dependent claims 2 to 11.

According to the invention, it is provided to design an operating method of the type mentioned at the outset, - that will be the control computer ^¬ a wedge strategy provided from the outside,

- that the control computer within the pass schedule calculation varies at least one of the recognized sizes, according to the predetermined wedge strategy so that the determined off ^¬ continuous wedge to a desired outlet wedge and / or the sword are at least approximately a target saber, and

- That the control computer passes the determined in the stitch plan calculation varied sizes to a Basisautomati- sation of the rolling stand, so that the flat Walz ^¬ well rolled in the rolling mill according to the varied sizes.

For example, the wedge strategy may be directed as needed to maintain the relative wedge, wedge = 0, saber, and so forth.

Also, the rolling of the flat rolling material in the rolling stand be ^¬ writing sizes can be determined as needed. In particular, they can roll ^¬ scaffold size and may be characteristic influencing the displacement of the flat rolled re ^¬ tively to the rolling stand center at least for the total rolling force, the rolling force difference between drive and operator's side, the appointing difference between the drive and operating side and at least another the rolling contour.

The other roll stand sizes can also be determined as needed. In particular, they can comprise a roll rebound force and / or a crowning of rolls of the roll stand and / or an entanglement and / or a displacement of the rolls of the roll stand relative to one another.

The rolling of the flat rolled in the roll stand beschrei ^¬ reproduced sizes may be supplemented by other sizes. The further variables may include, for example, the infeed and / or the run-off train in the flat rolling stock and / or the corresponding differences between the drive and operating side and / or the corresponding distributions over the width of the flat rolling stock. The determination of the outlet wedge and the saber, after loading ^¬ must be made. For example, it is possible for the control computer

- Based on the total rolling force, the rolling force difference between the drive and operating side, the other roll stand sizes, the width of the flat rolled material and the offset of fla ^¬ chen rolling material relative to the rolling mill center a roller contour portion,

 - Based on the employment difference between drive and operating side and a framework suspension difference between

Drive and operator side a Verkippungsanteil and

 - Determined on the basis of the roll contour portion and the Verkippungsanteils the discharge wedge and / or the saber.

It is preferably provided that the control computer

- Based on the total rolling force, the rolling force difference between the drive and operating side, the other roll stand sizes, the width of the flat rolled material and the offset of fla ^¬ chen rolling material relative to the rolling mill center a Biegeli ^¬ nienanteil,

- Based on the total rolling force, the rolling force difference between the drive and operating side and the width of the flat rolling ^¬ good a flattening and

 - determined on the basis of the bending line portion and the Abplattungsanteils the roll contour portion.

By doing so, the roll contour can share special ^¬ DERS efficiently, ie with relatively little computational effort, he ^¬ averages.

In a preferred embodiment of the present invention, it is provided that the framework parameters of the rolling stand for the drive and the operating side each comprise a separate Auffe ^¬ tion characteristic. With this configuration, a particularly flexible modeling of the discharge wedge and / or the saber is possible. The initial data may be purely symmetrical data, for example characterizing the average thickness and the average strength of the flat rolled stock. However, it is also possible for the initial data to additionally include variables which are characteristic of a wedge-for example a temperature wedge-and / or for a thickness wedge and / or for a (inlet-soapy) saber of the flat rolling stock.

It is possible that the target outlet wedge and / or the Sollsä- are specified at the control computer. For example, the target outlet wedge and / or the target saber can be given to 0 before ^¬. Alternatively, it is possible that the target discharge wedge and / or the target saber be explicitly specified to the control computer. Again alternatively, it is possible for the control computer to use the target run-out wedge using the

Initial data of flat rolled material determined. In this case, the control computer may in particular determine the relative wedge, i. the ratio of thickness wedge to medium thickness of the flat rolled material, maintained.

It is possible operating method of the invention - be ^¬ attracted to the respective rolling process - for each flat rolled only once to perform. Preferably, however, the control computer over the length of the flat rolled determined GeSe hen for a plurality of positions in each case the outlet wedge and vari ^¬ ated in accordance with the wedge strategy at least one of the next sizes. This procedure is particularly ^advantageous if the flat rolling stock is a strip. However, it is equally applicable if the flat rolling stock is a heavy plate.

In a preferred embodiment of the present invention, the control computer takes during the rolling of the flat rolled material in the rolling stand occurring rolling stand conditions and / or during and / or after rolling the flat rolled material in the rolling stand for the actual outlet wedge and / or the actual saber of the flat rolling characteristic sizes opposite. The control computer can in particular the sizes received in this case - for the determination of a part of or directly as part of the on ^¬ catch data of the flat rolled for at least one later than ^¬ direct rolling process of the same flat rolled stock in the same or another roll stand,

- For the adaptation of the wedge model and / or

- Use for the visualization of the actual discharge wedge and / or the actual saber of the flat rolled stock. The inventive object is also achieved by a Compu ^¬ terprogramm of the type mentioned. The computer program is designed in this case such that the control computer executes an operating method with all steps of an operating method according to the invention.

The object is further achieved by a control computer for a rolling mill for rolling a flat rolling stock, which is designed such that it carries out such Be ^¬ operating method during operation.

The object is further achieved by a rolling mill for rolling a flat rolling stock, which is equipped with such a control computer. Further advantages and details will become apparent from the following description of exemplary embodiments in conjunction with the drawings. In a schematic representation:

1 shows schematically a rolling train,

FIGS. 2 to 5 are flowcharts;

 6 shows a section of a flat rolling stock and

7 shows schematically a further rolling train.

1 shows a rolling mill for rolling a flat Walzgu- tes 1. The rolling line is formed as shown in FIG 1 as a multi-stand rolling ^¬ road, the more - has rolling stands 2 - usually four to eight. In the rolling stands 2 of the rolling mill, the flat rolling stock 1 is rolled. The rolling train is equipped with a control computer 3. The control computer 3 is designed such that it operates the rolling mill in accordance with an operating ^method with all the steps of an operating method according to the invention. The inventions dung proper method of operation in greater detail below erläu ^¬ tert. The corresponding design of the control computer 3 is effected by a computer program 4, with which the control computer 3 is programmed. The computer program 4 can be stored for this purpose on a suitable data carrier 5-purely by way of example is the data carrier shown in FIG 1 as a USB memory stick. The storage on the data carrier 5 is in machine-readable form, as a rule in an exclusively machine-readable form, for example in electronic form. The computer program 4 comprises machine code 6. The machine code 6 can be processed directly by the control computer 3. The processing of the machine code 6 by the control computer 3 causes the control computer 3 to operate the rolling train according to the operating method according to the invention. According to FIG. 2 - in addition FIG 1 is always to be used - the control computer 3 is given framework data in a step S1. The framework data describe framework parameters of a rolling mill 2 executing a specific rolling process, in particular its spring-back characteristic.

In a step S2, the control computer 3 for the specific rolling process in the specific rolling mill 2 initial data are known, which describe the flat rolling stock 1 before rolling in the respective rolling stand 2. The initial data comprise at least the width b, the average thickness d and ei ^¬ ne for the average strength of the flat rolled material 1 cha ^¬ characteristic size, for example, the temperature T. It is possible that the initial data to the control computer 3 are specified from the outside , Alternatively, it is possible for the control computer 3 to determine the initial data itself. For example, the initial data may result, in whole or in part, from a previous rolling operation that is performed prior to the rolling process now under consideration. This will be explained later to be purified. It is possible for the control computer 3 to carry out the step S2 as part of a passplan calculation.

In a step S3, the control computer 3 sets in the context of Stichplanberechnung sizes that describe the rolling of the flat rolled stock 1 in the respective rolling stand 2. Due to the fact that the control computer 3 executes the step S3 in the stitch plan calculation, the control computer 3 executes the step S3 before starting rolling of the rolling stock 1 in the corresponding rolling mill 2.

The stated sizes, in conjunction with the initial data d, b, T of the flat rolling stock 1 and the Gerüstda ^¬ th of the respective rolling stand 2, the rolling gap, which results in the respective rolling stand 2 during rolling of the flat rolled stock 1. They further describe the asymmetry of the roll gap seen in the direction of the roll axes. The control computer 3 is therefore able, in a step S4 as part of the stitch plan calculation based on the initial data b, d, T, the framework data and the set sizes by means of a

Keilmodells 7 to determine a discharge wedge K, which is expected for the flat rolling stock 1, when the flat rolling stock 1 is rolled in the respective stand 2 with the set sizes. Alternatively or additionally, by means of the wedge model 7, a saber K 'can be determined, which for the flat

Walzgut 1 is expected when the flat rolling stock 1 is rolled in Walzge ^¬ framework 2 with the sizes set.

The wedge model 7 comprises mathematical-physical equations by means of which the behavior of the rolling stand 2 and of the flat rolling stock 1 is described. It is also realized by the computer program 4 or the machine code 6.

The term "discharge wedge" has the following meaning: A discharge wedge is the asymmetrical part of the thickness function seen over the bandwidth b. The term "saber" means the curvature of the flat rolling stock 1 to the side. In a step S5, the control computer 3 varies as part of the stitch plan calculation according to a wedge strategy at least one of the set sizes. The variation takes place in such a way that the determined discharge wedge K is at least approximated to a desired discharge wedge. Alternatively or additionally, the determination can be made such that the saber K 'is approximated to a target saber.

In a step S6, the control computer via 3 outputs the men in the framework of the pass schedule calculation determined varied sizes to a base automation 8 of the respective roll stand 2. In general, in addition, the functional dependencies of the outlet wedge K and / or of the saber K 'of the attached ^¬ translated Sizes with handed. The basic automation 8 is thereby able to roll the respective rolling stand 2 in accordance with the varied sizes, while the flat rolling stock 1 passes through the respective rolling stand 2. The step S6 is also executed by the control computer 3 before the flat rolling stock 1 is rolled in the respective rolling stand 2.

The operating method according to the invention will be explained again below in connection with FIG. FIG. 3

Steps Sil to S16. Steps Sil to S16 correspond in terms of their approach to steps S1 to S6 of FIG. 2. However, steps S11 to S16 show more precise embodiments than steps S1 to S6.

The embodiment of the steps Sil to S16 can be implemented independently of each other. It is not necessary, for example, to combine the more concrete embodiment of step S11 with the more concrete embodiment of step S13. It could, for example, the sequence of Schrit ^¬ te Sil and S2 to S6 are combined with each other or the sequence of steps Sl, S2, S13 and S4 to S6 and derglei- chen more.

The Gerüstda ^¬ th set - in step Sil be - analogously to step Sl. According to step S, the framework Roll stand 2 parameters - separately for the drive and operating sides - each have their own spring characteristic.

In step S12, the control computer 3 becomes aware of the quantities b, d, T already mentioned in connection with step S2. In addition, the initial data may include, for example, a strength wedge - in particular a temperature wedge δΤ - and / or a thickness wedge 5d. Likewise, in addition, a characteristic variable for an incoming saber of the flat rolling stock 1 can be known, for example a corresponding curvature k.

Further, the control computer 3 may be known in the step S12 further data, for example the desired wedge and / or the target saber or maximum values for the outlet ^¬ wedge and / or the expiring saber.

Step S13 shows some of the set sizes. According to the step S3, the set sizes are characteristic at least for the total rolling force F. Preferably, the seeded ^¬ sizes are further characteristic of the rolling force differential 5F between the drive and operating side. Further possible scheduled sizes are more the rolling contour be ^¬ influential end mill sizes B, C, δΒ and the appointing difference 5s between drive and operator side. Optionally, an offset V can be used with. The offset V indicates how far the flat rolling stock 1 to Walzge ^¬ rüstmitte offset relative to the respective roll stand 2 enters. According to step S14, the control computer 3 determined by the total rolling force F, the rolling force differential 5F, the further roll stand sizes B, C, δΒ, the width b of the flat rolled stock 1 and the offset V a bend line portion Cl. Wei ^¬ terhin determined, the control computer 3 in step S14 based on the total rolling force F, the rolling force difference 5F and the

Width b of the flat rolling stock 1 a flattening K2. Furthermore, the control computer 3 determines in the context of step S14 on the basis of the difference in employment 5s and a framework suspension difference 5g between the drive and operator side a tilting component K3. Based on the bend line portion Kl, the Abplattungsanteils K2 and Verkippungsanteils K3 he ^¬ then averages the control computer 3 the outlet wedge K. If the initial data comprise values for the einlaufseifigen wedge and the einlaufseifigen saber and further the mono- and auslaufseifigen cables and the differences or distributions are known or a material transverse flow is excluded, in addition, the auslaufseifige saber K 'can be determined.

Steps S15 and S16 are identical to steps S5 and S6 of FIG. As an alternative to the procedure of step S14, in which separately the bending line component K1 and the flattening portion K2 are determined, it is possible to directly determine a roller contour component which corresponds to the sum of bending line component K1 and flattening component K2. If this procedure is to be implemented, it is possible, for example, to proceed as follows:

The rollers 9 of the rolling mill 2 considered are divided into finite elements. It is determined a matrix which sets a given displacement of the finite elements of a per ^¬ weiligen rest position with the resulting pressure distribution in the roll gap in relationship (so-called elastic Gleichun ^¬ gene). This matrix is inverted, so that based on a ge ^¬ passed rolling force distribution of the corresponding contour of the roll gap can be determined. The corresponding procedure for determining the matrix and its inversion are known to those skilled in the art. An analogous procedure is possible if, alternatively or in addition to the transition from the rolled stock 1 to the work roll 9, a transition between two rolls 9 of the rolling stand 2 is considered. An analogous procedure is also possible wei ^¬ terhin when the shifts are applied as continuous functions (so-called Green's radio ^¬ tion). FIG. 4 shows further possible embodiments of the invention

Step S13 of FIG 3. Analogously to the relationship of Figures 2 and 3 to each other and steps S21 and S22 are alternatively feasible.

In step S21 possible further rolling stand sizes erläu ^¬ tert. According to step S21 the further roll stand ^¬ sizes can comprise at least one of the following quantities: - A roll reverse bending force B

 - if necessary, their difference δΒ between drive and operating side,

 a (temperature and wear-dependent) crown C of rolls 9 of the respective roll stand 2,

- A shift of the rollers 9 of the respective rolling stand 2 in the direction of the roll axes and

 - An entanglement of the rollers 9 of the roll stand 2 against each other, i. an opposing pivoting of the rollers 9 of the roll stand 2 in and against a Walzgutlaufrichtung x.

The crown C can optionally be actively influenced by local cooling of the rollers 9. According to step S22, the control computer 3 can continue to be given additional variables which describe the rolling of the flat rolling stock 1 in the respective rolling stand 2. In particular, the control computer 3 can additionally be preset with at least one of the following variables:

- The inlet-side train Z in the flat rolling stock 1,

 - The outlet-side train Z 'in the flat rolling stock 1,

 - The corresponding differences δΖ, δΖ 'between the drive and operating side and

- The corresponding distributions over the width b of the flat rolled material. 1 The operating method according to the invention can be configured in various ways. Examples of such embodiments are shown in FIG. 5 shows various possible embodiments. The ^¬ designs are independent of each other feasible. Furthermore, the possible embodiments are explained in the context of FIG. 5 in conjunction with the steps S 1 to S 6, which have already been explained in FIG. Alternatively - the steps Sil through S16 of FIG 3 ver ^¬ applies, if necessary, in the embodiments according to FIG 4 - together increasing or individually.

According to FIG. 5, a step S31 is additionally present. In step S31, the wedge strategy is specified to the control computer 3. For example, the control computer can be specified whether he 'should set to 0 if it is to retain an existing relative Asym ^¬ spectrometry (possibly in which distribution from ^¬-running wedge-K and saber K' the outlet wedge K and / or the saber K ) and the like more.

Furthermore, there is a step S32. In step S32, the control computer 3 determines the target discharge wedge and / or the target saber using the initial data of the flat rolling stock 1. In particular, in the case where the flat rolled stock 1 already has a wedge and / or saber in the relevant rolling stand 2 prior to rolling, for example, the control computer 3 no longer or only because of the thickness d of the rolling stock 1 a material crossflow is possible to a limited extent, the target wedge and the target saber pretend such that the target saber is in the still tolerable range and the target wedge describes the remaining asymmetry of the flat rolled material 1. The determination of the desired wedge and / or the Sollsäbels in the context of step S32, of course, only if the desired wedge and / or the target saber are not already specified and determined by the wedge strategy as such. Furthermore, steps S36 to S38 (or at least one of the steps S36 to S38) may be present.

In step S36, the control computer 3 receives rolling stand conditions which occur during the rolling of the flat rolling stock 1 in the respective rolling stand 2. For example, the control computer 3 can receive the actual rolling forces and / or the actual rolling force differences or the corresponding values of the bending-back force.

In step S37, during the rolling of the flat rolling stock 1 in the relevant rolling stand 2, the control computer 3 can accept variables which are characteristic of the actual discharge wedge and / or the actual saber of the flat rolling stock 1. For example, the actual exit-side train or its difference or distribution can be detected and fed to the control computer 3.

In step S38 corresponding sizes can be accepted after rolling the flat rolled stock 1. For example, the flat rolling stock 1 may be measured after complete rolling in the respective rolling stand 2 under certain circumstances. It is also possible for suitable sizes to be detected at one point or at several locations behind the rolling stand 2 and for the actual outflow-side curvature of the flat rolling stock 1 to be closed on the basis of the variables. Corresponding ^¬ methods are known in the art.

The control computer 3 can use the quantities taken in the course of the steps S36, S37 and / or S38 for different purposes. For example, it is possible that the STEU ^¬ errechner a visualization of the actual spout wedge and / or the actual saber of the flat rolled product 1 in a step S41 3 - outputting to an operator 10 - for instance via a display or a printer. Alternatively or additionally, it is possible that the control computer 3 in a step S42 the actual, received size Compare ßen with corresponding expected sizes and adapted to the comparison of the wedge model 7.

Furthermore, it is possible that the control computer 3 uses the entge accepted sizes to determine actual conditions of the flat rolling stock 1 and to take into account in subsequent ^¬ gender processing steps. Beispielswei se, the control computer 3 in a step S43 check whether the processing of the flat rolled material 1 is completed. If this is not the case, the control computer 3 can proceed to a step S44, in which the control computer 3, the initial data of the flat rolled material 1 for a subsequent treatment step - in particular a subsequent rolling - the same flat rolled material 1 approaches or using this Data determined at least a portion of the initial data of the flat rolling stock 1. The subsequent rolling process can, depending on the type of rolling train, be carried out in the same or in another rolling stand 2. In the case that the rolling of the flat rolling stock 1 has not yet ended, that is to say still further rolling operations take place, a step S46 can additionally be present in addition. In step S46, the control computer 3 may change the wedge strategy under certain circumstances. For example, the control computer may determine the wedge strategy such that the discharge wedge K and the saber K 'are corrected if and as long as the running thickness d of the flat rolling stock 1 is greater than a kri cal thickness. However, if the thickness d of the flat rolled stock 1 before rolling is (are) smaller than the critical thickness, the control computer 3 may change the wedge strategy so that from this point on, the run-out wedge K existing at that time is maintained. Other amendments ^¬ insurance options are given. It is possible that the operating method according to the invention per flat rolled product 1 is executed only once. Vorzugswei se, however, it is executed several times. In particular, the control computer 3 according to FIG. 6 can be used over the length of the flat rolling mill. set good 1 seen a plurality of positions (sections 11) and for each section 11 each determine the outlet wedge K and / or the saber K 'and according to the respective given wedge ^¬ strategy at least one of the set sizes - for example, the rolling force difference 5F or the offset V - vary in the sense of approaching a respective setpoint. It is possible for the control computer 3 to carry out the determination of the discharge wedge K and / or the saber K 'for all considered sections 11 before the first section 11 of the rolled product 1 enters the considered rolling stand 2. At least, however, the control computer 3 executes the process for each section 11 at a timing before the respective Ab ^¬ cut enters the executing the respective rolling mill stand 2. 11

In conjunction with the Figures 1 to 6 was above beschrie ^¬ ben that a flat rolled material is rolled in a multi-stand rolling mill 1 wherein the Walzgutlaufrichtung x is always the same. In such an embodiment of the rolling mill each rolling pass is made in another rolling mill 2 of the rolling mill. This embodiment of the rolling train is particularly suitable when the flat rolling stock 1 is a band. In principle, however, this procedure is equally applicable if the flat rolled stock 1 is a heavy plate (a plate).

In principle it is also possible that the rolling train operates in reversing according to the Dar ^¬ position of Figure 7, is therefore designed as a reversing mill. In this case, the individual successes gen rolling operations (rolling passes) in the same Walzge ^¬ Rüst 2, with the Walzgutlaufrichtung x changes from rolling pass to roll down. This configuration lends itself to re insbesonde ^¬ when the flat rolling stock 1 is a thick plate. In principle, however, it is equally applicable when the flat rolled stock 1 is a strip. In this case, the reversing mill is preferably designed as a Steckel mill. The present invention has many advantages. Insbeson ^¬ particular is a targeted determining the run wedge K and / or of the saber K ', and an integration of this determination in the pass schedule calculation possible.

The above description is only for explanation of the present invention. The scope of the present invention, however, is intended to be determined solely by the appended claims.

Claims

claims 1. Operating method for a rolling train for rolling a flat rolling stock (1) in at least one rolling stand (2) of the rolling train, - wherein a control computer (3) for the rolling mill Gerüstpa ^¬ parameters of the rolling stand (2) descriptive framework data are given before ^¬  - Wherein the control computer (3) in the context of a stitch plan calculation, the rolling of the flat rolling stock (1) in the rolling stand (2) sets descriptive quantities (F, 5F, G, 5s, V),  wherein the set sizes (F, 5F, G, 5s, V) in connection with the flat rolling stock (1) before the rolling in the rolling stand (2) descriptive initial data (b, d, T) and the framework data of the roll stand (2 ) describe the rolling gap resulting from the rolling of the flat rolling stock (1) in the roll stand (2) and its asymmetry,  wherein the initial data (b, d, T) comprise characteristic quantities at least for the width (b), the average thickness (d) and the average strength of the flat rolled stock (1), - wherein the control computer (3) in the context of the stitch plan calculation on the basis of the initial data (b, d, T), the framework data and the attached sizes (F, 5F, G, 5s, V) by means of a wedge model (7) an outlet wedge (K) and / or a saber (Κ '), which are expected for the flat rolled stock (1), when the flat rolled stock (1) in the rolling stand (2) with the set sizes (F, 5F, G, 5s, V) rolled is characterized, characterized  - that the control computer (3) from the outside a wedge strategy is specified, - That the control computer (3) in the stitch plan calculation according to the predetermined wedge strategy at least one of the set sizes (F, 5F, G, 5s, V) varies, so that the determined discharge wedge (K) a target discharge wedge and / or the saber (Κ ') are at least approximated to a desired saber, and in that the control computer (3) transfers the variables (F, öF, G, ös, V) determined in the stitch plan calculation to a basic automation (8) of the rolling stand (2), so that the flat rolling stock (1) in the rolling mill stand (1) 2) according to the varied sizes (F, öF, G, ös, V) is rolled. 2. Operating method according to claim 1, characterized , that the variables describing the rolling of the flat rolling stock (1) in the rolling stand (2) (F, öF, G, ös, V) at least for the total rolling force (F), the rolling force difference (ÖF) between the drive and operating side, the employment difference ( ös) zwi ^¬ rule drive and operating side and at least one further roll contour influencing roll stand size (B, C, δΒ) and possibly the offset (V) of the flat rolled material (1) are characteristic relative to the rolling mill center. 3. Operating method according to claim 2, characterized , the further roll stand sizes (B, C, δΒ) include a roll bending force (B) and / or a crown (C) of rolls (9) of the roll stand (2) and / or an entanglement and / or a displacement of the rolls (9 ) of the roll stand (2) against each other. 4. Operating method according to claim 2 or 3, characterized , that the rolling of the flat rolling stock (1) in the rolling stand (2) descriptive variables (F, öF, G, ös, V) in addition to the inlet and / or the outlet-siphoning train (Z, Z ') in the flat Walzgut (1) and / or the corresponding differences (δΖ, δΖ ') between the drive and operating side and / or the corresponding distributions over the width (b) of the flat rolling stock (1). 5. Operating method according to claim 2, 3 or 4, characterized , that the control computer (3) - Based on the total rolling force (F), the rolling force difference (5F) between the drive and operating side, the other Walzge ^{¬ set} sizes (B, C, δΒ), the width (b) of the flat rolled material (1) and the offset (V) of the Flat rolling stock (1) relative to the rolling mill center a roller contour portion, - Based on the difference in employment (5s) between the drive and operating side and a Rahmenunterfederungsdifferenz (5g) between ^¬ drive and operating side a Verkippungsanteil (K3) and - Based on the roller contour portion and the Verkippungsanteils (K3) the discharge wedge (K) and / or the saber (K ') determined. 6. Operating method according to claim 5, characterized , that the control computer (3) - Based on the total rolling force (F), the rolling force difference (5F) between the drive and operating side, the other Walzenge ^{¬ set} sizes (B, C, δΒ), the width (b) of the flat rolled material (1) and the offset (V) of the Flat rolling stock (1) relative to the mill center a Biegelinienanteil (Kl),  - Based on the total rolling force (F), the rolling force difference (5F) between the drive and operating side and the width (b) of the flat rolling stock (1) a flattening portion (K2) and - Determines the roller contour component based on the bending line component (Kl) and the flattening component (K2). 7. Operating method according to one of the above claims, characterized , that the framework parameters of the rolling stand (2) for the drive and the operating side each comprise a separate Auffederungs- characteristic. 8. Operating method according to one of the above claims, characterized , the initial data (b, d, T) additionally comprise variables which are characteristic of a strength wedge, for example a temperature wedge (δΤ) and / or for a thickness wedge (5d) and / or for a saber of the flat rolling stock (1). 9. Operating method according to one of the preceding claims, d a d e r c h e c e n e c e n e, in that the control computer (3) determines the target discharge wedge and / or the nominal saber using the initial data (b, d, T) of the flat rolling stock (1). 10. Operating method according to one of the above claims, d a a c e c o v e c e s e c e n e, that the control computer (3) over the length of the flat Walzgu- tes (1) seen for several positions (11) determined in each case the off ^¬ continuous wedge (K) and / or the sword (K ') and at least one of the next in accordance with the wedge strategy Sizes (F, 5F, G, 5s, V) varies. 11. Operating method according to one of the above claims, d a d u c h e c e n e c e n e, that the control computer (3) Walzgerüstzustän- occurring during the rolling of the flat rolling stock (1) in the rolling stand (2) and / or during and / or after rolling the flat rolled stock (1) in the rolling stand (2) for the actual off ^¬ wedge and / or the actual saber of the flat rolling stock (1) receives characteristic sizes and that the control computer (3) uses the accepted sizes - for the determination of a part of or directly as part of the on ^¬ catch data (b, d, T) of the flat rolled product (1) for Minim ^¬ least a subsequent rolling operation of the same flat rolled stock (1) in the same or another roll stand (2),  - For the adaptation of the wedge model (7) and / or  - For the visualization of the actual discharge wedge and / or the actual saber of the flat rolled stock (1). 12. Computer program, the machine code (6), which is directly abarbeitbar by a control computer (3) for a rolling mill for rolling a flat rolled stock (1) and its processing by the control computer (3) causes the Control computer (3) operates the rolling mill according to an operating method with all steps of an operating method according to one of the above claims. 13. Control computer for a rolling train for rolling a fla ^¬ Chen rolling stock (1), characterized , in that the control computer is designed such that it operates the rolling train in accordance with an operating method with all steps of an operating method according to one of claims 1 to 11. 14. Rolling mill for rolling a flat rolled stock (1), d a d e r c h e c e n c e n e, in that the rolling train is equipped with a control computer (3) according to claim 13.