EP2931446B1 - Method for operating a rolling mill - Google Patents

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 tracking system score system, 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.

WO 2012/014026 A1 discloses a method according to the preamble of claim 1.

WO 2009/106422 A1 discloses a method for operating a multi-stand rolling mill, in which for a rolling stand input thicknesses and speeds of the incoming belt can be registered and based on a measured output speed and the input values, an output thickness of the outgoing band can be determined on the basis of a continuity equation.

Disclosure of the invention

The stated object is achieved by the method according to claim 1.

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 resp. Mass segmentation using such setpoints or reference values continues to be done with sufficient accuracy.

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.

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 not to every measuring point

Speed measurements are given or are to be used, measured values can be replaced by setpoints.

According to another embodiment, for identifying a volume or. Mass segment of several of said combinations i) - v ₂ ) according to claim 1 used. 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, in case of failure of one of the methods i) - v ₂ ) automatically switched to another of these methods 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 downstream of the scaffold in the tape direction measuring point, the effect of the rolling mill on the segment by checking at least one of the measured or other 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 roll stand for a rolling stock to be subsequently rolled or a roll to be rolled subsequently be 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 can for Example be provided that only as measured sizes, the tape head signals and a tape speed for the identification of the volume segments are provided, wherein in the identification or calculation of the volume segments at different measuring points in the course of the rolling mill, the conservation of the tape mass is taken into account. The inlet-side belt speed can be determined in one or more ways, for example 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

• Figur 1 ein beispielhaftes Schema einer Walzanlage zur Durchführung des erfindungsgemäßen Verfahrens;
• Figur 2 ein beispielhaftes Ablaufschema mit möglichen Kombinationen einer erfindungsmäßigen Volumensegmentierung;
• Figur 3 eine das erfindungsgemäße Verfahren und ein Verfahren gemäß dem Stand der Technik vergleichende Fehlerbetrachtung;
• Figur 4 ein beispielhafter Ausgang eines Volumenintegrators;
• Figur 5 ein beispielhaftes Ablaufschema einer Volumensegmentierung gemäß einem erfindungsgemäßen Ausführungsbeispiel.

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:

• FIG. 1 an exemplary scheme of a rolling mill for carrying out the method according to the invention;
• FIG. 2 an exemplary flowchart with possible combinations of an inventive volume segmentation;
• FIG. 3 a method according to the invention and a method according to the prior art comparative error consideration;
• FIG. 4 an exemplary output of a volume integrator;
• FIG. 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 FIG. 1 shown rolling mill 1 with four rolling stands 2 before. A possible equipment technical equipment is also in the FIG. 1 shown. Before the first rolling stand 2, the speed of the incoming belt 3 by means of a speed measuring device 4 and the thickness of the incoming belt 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. Other speed or thickness gauges 4, 5 can also be used.

gilt, bei der mit A die Querschnittsfläche des Bandes, mit p die Dichte des Bandes, mit v die Geschwindigkeit des Bandes und mit M die Masse des Bandes bezeichnet ist.In general, it is assumed that the conservation of the mass flow of Volume 3 is valid, the relationship $$\mathrm{M}=\int \mathrm{Apv}\mathrm{dt}=\mathrm{const}\mathrm{,}$$

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: $${\mathrm{M}}_{\mathrm{i}}=\int {\mathrm{A}}_{\mathrm{i}}{\mathrm{p}}_{\mathrm{i}}{\mathrm{v}}_{\mathrm{i}}\mathrm{dt}=\mathrm{const}\mathrm{,}\left(\mathrm{i}\right);\mathrm{i}=\mathrm{0}.....\mathrm{n}\mathrm{,}$$

The mass of each segment i of the belt 3 is assumed to be constant when passing through the rolling train 1. 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: $${\mathrm{V}}_{\mathrm{i}}=\int {\mathrm{A}}_{\mathrm{i}}{\mathrm{v}}_{\mathrm{i}}\mathrm{dt}=\mathrm{const}\mathrm{,}\left(\mathrm{i}\right);\mathrm{i}=\mathrm{0}.....\mathrm{n}$$

This means that each segment volume V _i is determined by integration over time on the product of its cross-sectional area A _i and its speed v _i.

In the case of a rolling mill 1 with strip-shaped rolling stock 3, the bandwidth b (corresponding to a desired value) can be regarded as constant. Neglecting the change in material density p, the above basic relationship can be briefly written as follows: $${\mathrm{V}}_{\mathrm{i}}=\mathrm{b}\int {\mathrm{d}}_{\mathrm{i}}{\mathrm{v}}_{\mathrm{i}}\mathrm{dt}=\mathrm{const}\mathrm{,}\left(\mathrm{i}\right);\mathrm{i}=1.....\mathrm{n}$$

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 technical 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 FIG. 2 ).

Behind the first roll 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 stand 2 and the measured belt speed behind the first stand 2 are available as a measured operating parameter.

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

When a segment boundary is formed in M ₂ and / or the tape head is detected at the measuring point M _4, M ₄ in the integration starts. To calculate the volume at this point, the bandwidth considered to be constant, the measured thickness behind the first stand 2 and the belt speed measured behind the first stand 2 are used.

As in FIG. 2 As shown, the foregoing described embodiment can be widely modified. If, for example, no thickness measurement is available, the volume can also be calculated with the respective desired thickness or an integration after the first measuring point M _{O is} dispensed with and the segment boundary is shifted to the next measuring point exclusively by means of a shift register if the belt speed measurement is available. 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. It is For example, only tapehead 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 FIG. 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. Thus, for example, the tape position of segment 11 shifts at the different measuring points of the time-based segment 8 at the first measurement point M _O in the segment 5 to the 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 FIG. 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 be done as functional as at the first measurement position behind the first measuring point M _O. 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 at the corresponding measuring point can either be carried out using another method or the relevant operating parameters can be replaced by the associated setpoint values.

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 can be different material properties, such as flatness, for example. 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 Fig. 5 shown on this embodiment, the time integration of the product of a target strip thickness and a desired bandwidth as a reference value or not measured parameter and the measured M in ₀ band speed begins. 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 Fig. 5 this is due to the sawtooth curves in the volume-time diagrams shown. 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 (16)

1. Method of operating a rolling mill (1), comprising the steps of:

   a) detecting at least one operating parameter as measured actual value; and

   b) identifying at least one volume or mass segment of a transiting rolling material (3) with use of the measured operating parameter and further operating parameters;

   wherein at least one of the operating parameters from the group of rolling material thickness, rolling material width, rolling material speed, rolling material density and cross-sectional area of the rolling material (3) is derived at a given measuring point (M₀, M₁, M₂, M₃, M₄, ..., M_n) and is entered into the identification as a non-measured target value,
   characterised in that
   the step of identification of the at least one volume or mass segment is carried out by integration and
   the at least one volume or mass segment of a transiting rolling stock (3) is detected at least one of the measuring points (M₀, M₁, M₂, M₃, M₄, ..., M_n) by at least one of the following combinations of operating parameters i) to iv₂) and integrated:

   i) measured cross-sectional area of the rolling material (3), measured rolling material speed;

   ii) target value for the cross-sectional area of the rolling material (3), measured rolling material speed;

   iii₁) target value of rolling material width, measured rolling material thickness, measured rolling material speed;

   iii₂) target value of rolling material width, measured rolling material thickness, target value rolling of material speed;

   iv₁) target value of rolling material thickness, measured rolling material width, measured rolling material speed;

   iv₂) target value of rolling material thickness, measured rolling material width, target value of rolling material speed.
2. Method according to claim 1, wherein for identification of the volume segment several of the combinations of i) to iv₂) are used and/or the quality of the segmentation is monitored by comparison of the identification by different ones of the combinations i) to iv₂).
3. Method according to claim 1 or 2, in which in the case of failure of one of the combinations i) to iv₂) there is automatic switching over to another one of these combinations so as to ensure tracking of the segment.
4. Method according to any one of the preceding claims, wherein a segmentation of the rolling material (3) into several mass or volume segments is undertaken at a first measuring point (M₀) by integration and the segment data are shifted by an automation system, particularly by means of shift registers, through the rolling train (1).
5. Method according to claim 4, wherein a segmentation into mass or volume segments by integration at several measuring points (M₀, M₁, M₂, M₃, M₄, ..., M_n) is undertaken and measuring points (M₀, M₁, M₂, M₃, M₄, ..., M_n) which in rolling material running direction follow the segments formed in the first measuring point (M₀) are first synchronised by the first measuring point (M₀).
6. Method according to claim 4, wherein a segmentation into mass or volume segments by integration at several measuring points (M₀, M₁, M₂, M₃, M₄, ..., M_n) is undertaken and, as measured and/or further operating parameters of one of the measuring points (M₀, M₁, M₂, M₃, M₄, ..., M_n), corresponding operating parameters of one of the preceding or following measuring points (M₀, M₁, M₂, M₃, M₄, ..., M_n) are used.
7. Method according to claim 4, wherein a segmentation into mass or volume segments is undertaken by integration at several measuring points (M₀, M₁, M₂, M₃, M₄, ..., M_n) and target values of operating parameters are used as measured and/or further operating parameters at at least one of the measuring points (M₀, M₁, M₂, M₃, M₄, ..., M_n).
8. Method according to claim 4, which additionally comprises the steps of at least two of claims 5 to 7 for formation of a redundancy of the segmentation of the mass or volume segments.
9. Method according to any one of the preceding claims, wherein a first synchronisation at a measurement point (M₀, M₁, M₂, M₃, M₄, ..., M_n) is carried out by detecting the rolling material head entry signal and/or by detecting a part of the rolling material (3) following the rolling material head.
10. Method according to any one of the preceding claims, wherein after transit of a segment through at least one roll stand (2) of the rolling mill (1) and tracking of the segment by means of a measuring point (M₀, M₁, M₂, M₃, M₄, ..., M_n) downstream of the stand (2) in rolling material running direction the effect of the roll stand (2) on the segment is ascertained and this ascertained effect of the roll stand (2) is taken into consideration for a subsequent rolling material segment to be rolled or a subsequent rolling material to be rolled.
11. Method according to any one of the preceding claims, characterised by the step of:

    detecting a rolling material head entry signal (MIS_M0, MIS_M1, MIS_M2, ..., MIS_Mn) as measured operating parameter, particularly as start signal for the integration of the mass or volume segments.
12. Method according to any one of the preceding claims, characterised in that a rolling material speed at the entry side is entered into the identification as measured operating parameter.
13. Method according to claim 12, characterised in that the rolling material speed is measured by measuring the unreeling process of a dispensing reel.
14. Method according to claim 1 or 2, wherein the rolling material width is measured only ahead of a first roll stand (2) of the rolling mill (1) or the rolling material width enters into the identification only as an unmeasured target value.
15. Method according to claim 1, characterised in that the rolling material thickness is measured at not more than three measuring points, particularly ahead of a first roll stand (2), directly after the first roll stand (2) and after a last roll stand (2), wherein a plurality of roll stands (2) is provided.
16. Method according to any one of the preceding claims, characterised by the step:

    identifying the mass or volume segments in a subordinate program unit responsible for setting the rolling mill (1), in particular with association of measured and/or further operating parameters with the mass or volume segments.

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