DE102012222996A1 - Method for operating a rolling mill - Google Patents

Abstract

The invention relates to a method for operating a rolling mill (1), comprising the steps of detecting at least one operating parameter as the measured actual value and identifying at least one mass or volume segment of a continuous rolling stock by using measured operating parameters and / or further operating parameters by integration , where at a given measuring point (MO, M1, M2, ..., Mn) at least one of the operating parameters from the group strip thickness, bandwidth, belt speed, band density and cross-sectional area of the tape comes and enters as an un-measured setpoint in the identification.

Description

Technical area

The invention relates to a method for operating a preferably multi-stand rolling mill, in particular for tracking material transported through the plant rolling stock.

State of the art

In the operation of rolling mills, properties of the rolling stock are often recorded at different locations with measuring sensors. In order to be able to assign the measured variables to individual physical regions of the rolling stock, a time-related segmentation of the rolling stock can take place. The measurement data are sorted by time, that is, the measurement data acquisition is performed in a fixed time grid. In this method, correct assignment to physical segments is not given to all operating states. In particular, when speed changes or geometric changes such as a band thickness change, the correct physical assignment is not given with this method.

The object of the invention is an efficient method for tracking selectable sections (segments) of a rolling stock, such as e.g. of a belt during passage through a rolling line with respect to time and location of a segment in the rolling train. The terms rolling stock and strip are used interchangeably below for the material to be rolled.

Preferably, the method for different metrological equipment of rolling mills should be applicable, in particular for cost reduction with increasing efficiency requirements.

Furthermore, it is advantageous to adapt the exactness of the tracking of the band sections / band segments to the particular desired or required accuracy, also taking into account the subsequent addition of operating parameters. The identification of the band segments is supported by a mathematical method that evaluates measured variables and / or setpoints.

Further advantages of the invention lie in the possibility of initiating operating parameters, creating a warning system for follower units, i. an adaptation of the plant setting, further facilitating the finding of defects and the analysis of process errors in a pre-aggregate, as well as in the support of the adaptive learning of a parent program unit, which is responsible for the setting of the rolling mill.

Disclosure of the invention

The stated object is achieved by the method according to claim 1. This method for operating a rolling mill comprises the steps of detecting at least one operating parameter as the measured actual value and identifying a volume or mass segment of a continuous band using the measured operating parameter and further operating parameters by integration. At a given measuring point, at least one of the further operating parameters from the group strip thickness, strip width, strip speed, strip density and cross-sectional area of the strip is received, which enters the identification as a non-measured desired value or as a predetermined operating parameter.

For the purposes of the invention, identification means the time assignment of a band segment to a location of the plant; Under detection within the meaning of the invention, the temporal assignment of a measurement or a desired value to a measuring point of the system to understand

By using at least one unmeasured nominal value at a given measuring point, a corresponding measurement of this value can be dispensed with. Experiments have shown that the volume or mass segmentation continues to be carried out with sufficient accuracy when using such desired values or reference values.

In this context, a setpoint value in the sense of the invention is understood to mean any value entering the identification of the volume segment which is not an immediate measured value, for example invariable parameters of the system or preselectable setpoint values or calculated setpoint values, such as roll thickness. In particular, a desired value at a measuring point in the sense of the invention may be a value which has been measured at a preceding measuring point. The term setpoint may be considered equivalent to a predetermined value or other operating parameter.

The invention may be directed to the following features of a method of operating a rolling mill as follows:

• i) Gemessene Querschnittsfläche des Bandes, gemessene Bandgeschwindigkeit;
• ii) Sollwert für die Querschnittsfläche des Bandes, gemessene Bandgeschwindigkeit;
• iii) Sollwert für die Querschnittsfläche des Bandes, Sollwert Bandgeschwindigkeit;
• iv₁) Sollwert Bandbreite, gemessene Banddicke, gemessene Bandgeschwindigkeit;
• iv₂) Sollwert Bandbreite, gemessene Banddicke, Sollwert Bandgeschwindigkeit;
• v₁) Sollwert Banddicke, gemessene Bandbreite, gemessene Bandgeschwindigkeit.
• v₂) Sollwert Banddicke, gemessene Bandbreite, Sollwert Bandgeschwindigkeit.

Identifying a volume segment at at least one measuring point by detecting and integrating at least one of the following combinations of measured and / or predetermined operating parameters i) to v ₂ ):

• i) measured cross-sectional area of the belt, measured belt speed;
• ii) nominal value for the cross-sectional area of the belt, measured belt speed;
• iii) nominal value for the cross-sectional area of the belt, nominal value belt speed;
• iv ₁ ) setpoint bandwidth, measured strip thickness, measured strip speed;
• iv ₂ ) setpoint bandwidth, measured strip thickness, setpoint strip speed;
• v ₁ ) Setpoint strip thickness, measured bandwidth, measured strip speed.
• v ₂ ) Setpoint strip thickness, measured bandwidth, belt speed setpoint.

Thus, this process can be carried out either alone or as a preferred embodiment of the former method.

The methods i) -v ₂ ) mentioned differ essentially in the number of signals or measured values required for the segmentation.

If the operating parameters are measured at several measuring points, the accuracy of the segment tracking increases, but at the cost of a high level of equipment complexity.

Thus, according to one embodiment, the measurement of a strip cross-section and the strip speed can take place at a first measuring point and, in addition, the speed of the strip can be measured at further measuring points passed through the strip at a later time. Optionally, the cross-sectional area can also be calculated only by multiplying the material thickness with a belt width determined to be constant.

In a further embodiment, the measured values of all cross-sectional areas at the subsequent measuring points are required in addition to the speed measured values.

The latter two embodiments require a corresponding equipment expense. If speed measuring values are not given or should be used for each measuring point, measured values can be replaced by setpoints.

According to a further embodiment, a plurality of said combinations i) -v ₂ ) are used to identify a volume or mass segment. This creates a redundancy which, for example, can serve to control the quality of the segmentation by comparing the identification by the various methods.

Alternatively or additionally, if one of the methods i) -v ₂ ) fails, it can be automatically switched over to another of these methods in order to ensure the tracking of the segment.

According to a further embodiment, a segmentation of the strip into a plurality of mass or volume segments is performed at a first measuring point of the rolling mill by integration, wherein the segment data are pushed through the rolling train only by an automation system, in particular by means of shift registers. By means of such an approach by means of an automation system, the number of required measured values or measuring points can be considerably reduced. This embodiment can also be understood independently of the above-mentioned method for operating a rolling mill.

According to a further embodiment of the method, segmentation into mass or volume segments is performed by integration at a plurality of measuring points, and the measuring points following the first measuring point in the strip running direction are synchronized by the first measuring point. The synchronization can be forwarded to the subsequent measuring points by shift registers. Synchronization or initial synchronization means in particular that a start signal or the start time is given at the beginning of the integration at a measuring point.

According to a further embodiment of the method, segmentation into mass or volume segments is performed by integration at a plurality of measuring points, and corresponding measured or further operating parameters of one of the preceding or following measuring points are used as operating parameters at one of the measuring points.

According to a further embodiment of the method, a first synchronization takes place at a measuring point by detecting (the position or the presence) of the tape head and / or by detecting a part of the tape following the tape head. The detection of the tape head does not necessarily have to be done at each measuring point. Other parts of the belt that may also be used for synchronization, for example, are rolling stock features, or, for example, welds.

According to a further embodiment, after passing through a segment by at least one rolling stand of the rolling train and following the segment by means of a measuring point downstream of the scaffold in the strip running direction, the effect of the rolling stand on the segment is determined by checking at least one of the measured or further operating parameters. In other words, the effect of setting the framework on the rolling stock can be determined or the effect of the entire system on the rolling stock. Thus, the effect of the rolling stand for a rolling stock to be rolled subsequently or a rolling stock to be subsequently rolled are taken into account.

In a further embodiment of the invention, a tape head run-in signal is detected as a measured operating parameter. This signal can act as a start signal for the integration of the volume segments at the respective measuring point. Since the tape head run-in signal is regularly collected for safety and other functions of the rolling mill, it is particularly well suited to simplifying the identification of volume segments. When using the tape head inlet signal, the inventive method segments with very high accuracy.

In a further embodiment of the invention, an inlet-side belt speed enters the identification as a measured operating parameter. Again, this is a frequently detected measure that is also needed for other functions of the rolling mill. In a particularly simple and sufficiently accurate identification of volume segments, it may be provided, for example, that the tape head signals and a tape speed for the identification of the volume segments are provided exclusively as measured quantities, wherein in the identification or calculation of the volume segments at different measuring points in the course of Rolling mill the conservation of the strip mass is taken into account. The inlet side belt speed can be determined in one or more ways, e.g. by a laser beam, by a sensor of an input-side deflection roller and / or by measuring the unwinding action of an uncoiler. For example, in the measurement of the unwinding operation of a reel, the diameter and angular velocity of the reel can be continuously determined to calculate the in-feed belt speed.

To further simplify a method according to the invention, it is provided that the bandwidth is measured only in front of the first roll stand.

Alternatively, it may also be provided for further simplifications that the bandwidth is received as an unmeasured setpoint in the identification of the volume segments.

A reduction of measuring points and sensors is advantageous in that, for example, the strip thickness is measured at, for example, not more than three measuring points. A first measuring point may be provided in front of a first rolling stand, a second immediately after the first rolling stand and a third after the last rolling stand. The location of the measuring points is not limited to the areas in front of or behind a scaffold, a measuring point or several measuring points may or may also be located on a scaffold or more scaffolding. Overall, this makes it possible to ensure a very accurate identification of the volume segments, without too many measuring sensors being used for this purpose.

The abovementioned embodiments or methods can be combined with one another as desired, so that a variable optimization between high accuracy requirements combined with a lower measurement effort can be achieved.

In one embodiment of the invention, it is provided that the identification of the volume segments in a parent program unit, which is responsible for the setting of the rolling mill, takes place. This can be done by assigning further measurement data to the volume segments.

Further advantages and features of the invention will become apparent from the embodiments described below and from the dependent claims.

Brief description of the figures

The figures of the application relate to the embodiments of the invention and are not intended to be limiting. Further are disclosed in the subsequent detailed description of the embodiments. Show it:

1 an exemplary scheme of a rolling mill for carrying out the method according to the invention;

2 an exemplary flowchart with possible combinations of an inventive volume segmentation;

3 a method according to the invention and a method according to the prior art comparative error consideration;

4 an exemplary output of a volume integrator;

5 an exemplary flowchart of a volume segmentation according to an embodiment of the invention.

Detailed description of the embodiments

In one embodiment of the inventive method is in 1 shown rolling mill 1 with four rolling stands 2 in front. One possible instrumentation equipment is also in the 1 shown. In front of the first rolling stand 2 be the speed of the incoming tape 3 by means of a speedometer 4 and the thickness of the incoming band 3 by means of a thickness gauge 5 , preferably continuously, measured. The speed measurement takes place, for example, by means of a deflection roller and / or without contact with a laser speed measuring system. The thickness measurement can be done for example by absorption of X-rays. There may also be other speed or thickness gauges 4 . 5 Find use.

In general, it is assumed that the conservation of the mass flow of the tape 3 is valid, the relationship M = ∫ A pv dt = const. where A is the cross-sectional area of the belt, p is the density of the belt, v is the speed of the belt, and M is the mass of the belt.

In other words, for each of the individual segments i at each measuring point: M _i = ∫ A _i p _i v _i dt = const. (I); i = 0, ..., n.

In the process, the mass of each segment i of the band becomes 3 when passing through the rolling train 1 assumed to be constant. However, the masses M _i can be chosen differently for different segments i. The integration over the time t takes place in each case until the constant or predetermined mass M _{i of} the respective segment i is reached. Subsequently, the integration of the segment i + 1 with the respective associated mass M _{i + 1} can take place.

The density p can be assumed to be constant for the rolling stock and all segments i. Thus, the above equation can be transformed into an equation for volume conservation, so that: V _i = ∫ A _i v _i dt = const. (I); i = 0, ..., n

This means that each volume segment V _{i can be} determined by temporal integration via the product of its cross-sectional area A _i and its velocity v _i .

In the case of a rolling mill 1 with strip-shaped rolling stock 3 For example, the bandwidth b (corresponding to a setpoint) can be considered constant. Neglecting the change in material density p, the above basic relationship can be briefly written as follows: V _i = b ∫ d _i v _i dt = const. (I); i = 1, .., n

By integrating the measured thickness d multiplied by the reference bandwidth b considered as constant and the measured material speed, the volume flow at a possible measuring point M _O , M ₁ , M ₂ , M ₃ , M ₄ ... M _{n is determined} as the operating parameter. The integration is started, for example, when the tape head is detected at the respective measuring point.

The above-mentioned integrations can be carried out at each measuring point M _O , M ₁ , M ₂ , M ₃ , M ₄ ... M _n . Which of the dimensions cross section A, thickness d, width b, velocity v, density p are used as measured values or as set values (given operating parameters or operating parameters measured elsewhere) depends on the desired degree of accuracy of the method, a possibly desired redundancy or of the equipment of the rolling mill 1 from.

The volume flow can be determined by integrating the measured thickness d multiplied by the reference bandwidth b regarded as constant and the measured material speed at a first measuring point M _O as the operating parameter. The integration is started, for example, when the tape head is detected at the first measuring point M _O (see also FIG 2 ).

Behind the first rolling stand 2 For example, the belt speed is measured, for example, by means of a deflection roller and / or optically. One or more shift registers transport the respective segment boundary with the physical belt speed, for example up to the measuring point M ₂ . The integration at the measuring point M ₂ is started when a segment boundary formed at the measuring point M _O arrives at the measuring point M ₂ and / or when the passage of the tape head is detected at the measuring point M ₂ . To calculate the volume of the segment i, the bandwidth b considered to be constant, the measured thickness behind the first framework 2 and the measured belt speed behind the first stand 2 as measured operating parameter available.

Behind the second rolling stand 2 is in the example no thickness measurement, but only a measurement of the belt speed, for example by means of deflection roller.

If a segment boundary formed in M ₂ and / or the tape head is detected at measuring point M ₄ , the integration starts in M ₄ . To calculate the volume at this point, the measured bandwidth is considered to be constant, the measured thickness behind the first framework 2 and those behind the first scaffold 2 measured belt speed used.

As in 2 As shown, the foregoing described embodiment can be widely modified. For example, if no thickness measurement is available, the volume can also be calculated with the respective desired thickness or it will not integrate behind the first measuring point M _O and the segment boundary displaced in the existing tape speed measurement exclusively by means of the shift register to the next measuring point. In the event that neither a strip thickness measurement nor a belt speed measurement at a specific measuring point are available or should be used for identification, an existing pair of values (material thickness and material speed) of another measuring point can be used, since the mass continuity is met in the rolling mill. For example, only tape head detection is required to start the integration process. The choice of which segmentation method to use may be made dynamically dependent on the condition and availability of the meters.

Each band segmentation method provides a counter value Z for the currently measured band segment and a signal for the associated measurement site, eg M _O , M ₂ , M ₄ . The volume segment size can be changed during ongoing rolling operation. An adjustment of the segment volume can take place immediately behind a segment boundary. The count value of the first segment with the new segmentation size volume segment V 'is sent to all other measuring points.

In 3 is a comparison between the segmentation according to an embodiment of the inventive method (volume segmentation) and the time-controlled method, as it corresponds to the above-described prior art represented. In this case, the correct physical segmentation (Vol) is counted up for different measuring points M ₀ to M _{5 in} each case at the top in each case below the segmentation corresponding to a constant time base (Iso).

It can be seen that with speed changes, the time-based segmentation no longer matches the physically correct segmentation. For example, the tape position of Segment shifts 11 at the different measuring points of the time-based segment 8th at the first measuring point M _O in the segment 5 at measuring point M ₅ .

By simulation, it has been found that the segmentation has different small discretization errors depending on the method of the present invention. Depending on the combination, this can be, for example, of the order of magnitude of the basic cycle time of the automation system and in this case is the same for all measuring points.

An integrator is used to calculate the volume segmentation. This determines the segment boundaries for the size of a given volume via one of the preceding equations. When the appropriate segment size is reached, the integrator is reset. The output of such a device has, for example, a as in 4 shown course. If the setpoint volume (in the case shown: 3 segment volume units) is reached, a rising edge at the integrator output triggers an incremental count signal Z.

The volume segmentation can be carried out in particular at a first measuring point or measuring position M _O. Input value for the segmentation would be the material speed, the cross-sectional area, the material density and in particular the volume segment size to be subdivided, which can be variably specified. The material speed can be determined in one or more ways, as described in advance. Setpoint values can also be used for all measured operating parameters.

The volume segmentation can take place behind the first measuring point M _O, for example functionally as at the first measuring position. Again, measured operating parameters can be replaced by setpoints. On the assumption of mass conservation or volume conservation (assuming a constant density), the measured operating parameters of other measuring points can also be used as predetermined operating parameters. The count can be synchronized via the shift of the segment boundaries as soon as the required operating parameters are met, or by the recognition of the rolling stock at the measuring point. The desired segment volume or target segment mass is supplied together with the associated segment count Z, for example, from the first measurement position M _O or else from another previous measurement position.

The output of the volume segmentation at the first measuring point can be passed on to a cascade or series of shift registers between the subsequent measuring points. The measured operating parameter may be the measurement of the material speed.

The segmentation depends on the operating parameters required for the segmentation. If some of the required operating parameters are invalid, for example due to erroneous or failed measuring signals, the segmentation can be carried out at the corresponding measuring point either by another method or the relevant operating parameters can be replaced by the associated setpoints.

Multiple segmentation methods can be used simultaneously, providing redundancy. Such redundancy will be discussed below.

If a segmentation over constant masses or volumes is carried out by integration at all measuring points, this method has the smallest discretization error (method B). However, it requires additional measured and / or predetermined operating parameters. In order to achieve an exact initial synchronization, an integration is carried out at the first measuring point via mass or volume segments (method B), whereby this segmentation is pushed through the rolling train via shift registers (method A). If the segmentation made (Method B) fails at one or more measuring points after the initial synchronization, the method of integration via mass or volume segments at the first measuring point and the shift by means of a shift register (Method A) through the rolling train can be used automatically so that method A represents a detachment function. If the required operating parameters are available again, the system switches back to method B, where the integration is again carried out at each measuring point. The new counter reading is synchronized via the corresponding value from the shift register. In the event of a failure of required measurements, use of setpoint values can be resorted to.

For further validation of the validity of a measuring point, the deviation between the individual methods can be used.

For synchronization, various measures can be taken. For example, the initial synchronization may be by the tape head entry signal. This detection can be done for example by means of force sensors, optical sensors or other detection methods. The position of the tape head can be determined depending on the time. This can be done at one or more of the measuring points.

After determining the tape head position at a measuring point, the position of the tape head can be calculated by means of the automation system. For all methods, the integration of additional synchronization measuring points increases the positional accuracy of the rolling stock.

Alternatively, the initial synchronization takes place behind the tape head. For this purpose, intermediate stand speeds are preferably available as measured and / or predetermined operating parameters.

As described above, it is preferably provided that the identification of the volume segments takes place in a superordinate program unit which is responsible for setting the rolling mill. This can be done by assigning further measurement data to the mass or volume segments. To optimize the automation tasks, the identified volume segmentation can also be transferred to the higher-level program unit, which is responsible for setting the rolling mill.

The parent program unit, which is responsible for the setting of the rolling mill can be designed in particular adaptive learning.

Within the higher-level program unit, the further operating parameters which have occurred during the rolling process can be assigned to the respective identified volume segment of the belt, for example to enable optimization and / or improved error control of the rolling mill. These further operating parameters may be different material properties such as flatness, tensile stress distribution, overfeed (differential speed) during rolling, etc.

According to one embodiment of the method according to the invention, there is a rolling mill with a number of rolling stands, wherein an uncoiler is arranged on the input side and a reel on the output side (not shown).

Between the uncoiler and the first rolling stand, the incoming strip is guided in accordance with this exemplary embodiment over a first deflection roller whose rotational speed is preferably measured continuously via a pulse transmitter. It follows, preferably immediately, the inlet side actual belt speed at a first measuring point M _O as a first measured operating parameters.

Furthermore, there is a means in front of or at the first stand, which detects the entry of a tape head at the beginning of the rolling process. This measured value MIS _O is a Boolean measured variable of a first measuring point M _O and represents a second measured operating parameter of the rolling mill.

Further, located in the further course of the rolling mill according to the embodiment further means for detection of the passing tape head, as further measuring points M _1, M _2, ..., M _n boolean values MIS _M1, MIS _M2, ..., MIS _Mn for create the passage of the tape head.

At each of the measuring points M _O , M ₁ , M ₂ ... the passage of the tape head causes a first synchronization, which serves as a start signal for an integration process.

As in 5 For this exemplary embodiment, the time integration of the product of a nominal strip thickness and a nominal bandwidth begins as reference values or unmeasured parameters and the belt speed measured in M ₀ . The volume integrated over time controls a volume segment counter once it has reached a predetermined size, after which a re-integration of the next volume segment begins. In 5 This is illustrated by the sawtooth curves in the volume-time diagrams. The timelines of the three diagrams shown below are identical, ie they start at the same time.

The detection of the incoming belt speed M ₀ is known at each measuring point, and thus passes through which volume segment at which point in time at which measuring point.

It should be emphasized that the deviations are each limited to the same segment and pushed with this segment through the system. This allows a sufficiently accurate assignment of further operating parameters to a respective volume segment. Such further operating parameters may be, for example, a local band distribution or measured values for the band flatness. The volume segments are preferably detected by a parent program unit, which is responsible for the setting of the rolling mill, the system and linked to the other measured and / or other operating parameters.

The features of the described embodiments can be combined or replaced with each other.

LIST OF REFERENCE NUMBERS

1

 rolling plant

2

 rolling mill

3

 tape

4

 velocity meter

5

 thickness gauge

M _O

 measuring point

M ₁

 measuring point

M ₂

 measuring point

M ₃

 measuring point

M ₄

 measuring point

M _n

 measuring point

MIS

 Bandleader lead-in

V

 volume

t

 Time

Z

 Counter value of the segments

Claims (17)

Method for operating a rolling mill ( 1 ), comprising the steps of: a) detecting at least one operating parameter as a measured actual value; and b) identifying at least one volume or mass segment of a continuous rolling stock ( 3 ) using the measured operating parameter and other operating parameters through integration; wherein at a given measuring point (M _O , M ₁ , M ₂ , M ₃ , M ₄ , ..., M _n ) at least one of the operating parameters from the group Walzgutdicke, Walzgutbreite, Walzgutgeschwindigkeit, Walzgutdichte and cross-sectional area of the rolling stock ( 3 ) and enters as an un-measured set point in the identification. Process according to claim 1, wherein the at least one volume or mass segment of a continuous rolling stock ( 3 ) is detected and integrated at at least one of the measuring points (M ₀ , M ₁ , M ₂ , M ₃ , M ₄ , ..., M _n ) by at least one of the following combinations of operating parameters i) to v ₂ ): i) Measured cross-sectional area of the rolling stock ( 3 ), measured rolling stock speed; ii) nominal value for the cross-sectional area of the rolling stock ( 3 ), measured rolling stock speed; iii) nominal value for the cross-sectional area of the rolling stock ( 3 ), Setpoint material velocity; iv ₁ ) set value of rolling stock width, measured rolling stock thickness, measured rolling stock speed; iv ₂ ) Rolling stock width, measured stock thickness, rolling stock speed setpoint; v ₁ ) Rolling stock thickness, measured rolling stock width, measured rolling stock speed. v ₂ ) Rolling stock thickness setpoint, measured rolling stock width, rolling stock speed setpoint. Method according to claim 2, wherein several of the combinations of i) to v ₂ ) are used to identify the volume segment, and / or the quality of the segmentation is monitored by comparing the identification by different ones of the combinations i) to v ₂ ). A method according to claim 2 or 3, wherein in case of failure of one of the combinations i) to v ₂ ) to ensure the tracking of the segment is automatically switched to another of these combinations. Method according to one of the preceding claims, wherein at a first measuring point (M _O ) by integration a segmentation of the rolling stock ( 3 ) is carried out in a plurality of mass or volume segments and the segment data by an automation system, in particular by means of shift registers, through the rolling mill ( 1 ) are pushed. A method according to claim 5, wherein a segmentation in mass or volume segments by integration at a plurality of measuring points (M _O , M ₁ , M ₂ , M ₃ , M ₄ , ..., M _n ) is carried out and in the first measuring point ( M _O ) formed segments in Walzgutlaufrichtung subsequent measuring points (M _O , M ₁ , M ₂ , M ₃ , M ₄ , ..., M _n ) are first synchronized by the first measuring point (M _O ). A method according to claim 5, wherein a segmentation in mass or volume segments by integration at several measuring points (M _O , M ₁ , M ₂ , M ₃ , M ₄ , ..., M _n ) is made and as measured and / or further Operating parameters of one of the measuring points (M _O , M ₁ , M ₂ , M ₃ , M ₄ , ..., M _n ) corresponding operating parameters of one of the preceding or subsequent measuring points (M _O , M ₁ , M ₂ , M ₃ , M ₄ , ..., M _n ) are used. A method according to claim 5, wherein a segmentation in mass or volume segments by integration at several measuring points (M _O , M ₁ , M ₂ , M ₃ , M ₄ , ..., M _n ) is made and as measured and / or further Operating parameters at at least one of the measuring points (M _O , M ₁ , M ₂ , M ₃ , M ₄ , ..., M _n ) setpoint values of operating parameters can be used. The method of claim 5, further comprising the steps of at least two of claims 6 to 8 for forming a redundancy of the segmentation of the mass or volume segments. Method according to one of the preceding claims, wherein a first synchronization at a measuring point (M _O , M ₁ , M ₂ , M ₃ , M ₄ , ..., M _n by detecting the Walzgutkopfeinlaufsignals and / or by detecting a Rollgutgut following part of the Rolling stock ( 3 ) he follows. Method according to one of the preceding claims, wherein after passage of a segment through at least one roll stand ( 2 ) of the rolling mill ( 1 ) and following the segment by means of a scaffold ( 2 ) in Walzgutlaufrichtung downstream measuring point (M _O , M ₁ , M ₂ , M ₃ , M ₄ , ..., M _n the effect of the roll stand ( 2 ) is detected on the segment, and this observed effect of the roll stand ( 2 ) is taken into account for a rolling stock segment to be subsequently rolled or a rolling stock to be subsequently rolled. Method according to one of the preceding claims, characterized by the step of: detecting a rolling stock inlet signal (MIS _MO , MIS _M1 , MIS _M2 , ..., MIS _Mn ) as a measured operating parameter, in particular as a start signal for the integration of the mass or volume segments. Method according to one of the preceding claims, characterized in that an inlet-side rolling stock enters as a measured operating parameter in the identification. A method according to claim 13, characterized in that the Walzgutgeschwindigkeit by measuring the rolling process of a take-off, measured. Process according to claim 1 or 2, wherein the rolling stock width is only in front of a first rolling stand ( 2 ) of the rolling mill ( 1 ) or the width of the rolling stock is included in the identification only as a non-measured setpoint. A method according to claim 1 or 2, characterized in that the rolling stock thickness is measured at not more than three measuring points, in particular in front of a first roll stand ( 2 ), immediately after the first rolling stand ( 2 ) and after a last mill stand ( 2 ), wherein several rolling stands ( 2 ) are provided. Method according to one of the preceding claims, characterized by the step of: identifying the mass or volume segments in a superordinate program unit which is required for the setting of the rolling mill ( 1 ), in particular under assignment of measured and / or further operating parameters to the mass or volume segments.

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