EP2712332B1 - Method for controlling a hot strip rolling line - Google Patents

Method for controlling a hot strip rolling line Download PDF

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Publication number
EP2712332B1
EP2712332B1 EP12727821.6A EP12727821A EP2712332B1 EP 2712332 B1 EP2712332 B1 EP 2712332B1 EP 12727821 A EP12727821 A EP 12727821A EP 2712332 B1 EP2712332 B1 EP 2712332B1
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EP
European Patent Office
Prior art keywords
rolling stock
rolling
predetermined location
energy content
hot strip
Prior art date
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EP12727821.6A
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German (de)
French (fr)
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EP2712332A1 (en
Inventor
Klaus Weinzierl
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Primetals Technologies Germany GmbH
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Primetals Technologies Germany GmbH
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Priority to EP12727821.6A priority Critical patent/EP2712332B1/en
Publication of EP2712332A1 publication Critical patent/EP2712332A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/006—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring temperature

Definitions

  • the present invention further relates to a computer program comprising machine code, which is directly abungbar by a control computer for a hot strip mill for rolling a flat rolled metal and whose processing by the control computer causes the control computer the Hot strip mill operates according to such an operating method.
  • the present invention further relates to a control circuit for a hot strip mill for rolling a flat rolled material of metal, wherein the control computer is designed such that it operates the hot strip mill according to such an operating method.
  • the temperature of the corresponding rolling point can be detected by measurement.
  • the temperature profile over the thickness of the rolling stock can be determined by a model.
  • a desired energy content profile can be determined, which is taken into account when determining the energy content influences to which the respective rolling stock point is subjected.
  • the known control method works very well when relatively thin strip material is rolled, so that all rolling stands the finishing train are engaged, ie the flat rolling (usually a band) to roll.
  • finishing mills and subordinate cooling section and relatively thick strips are rolled with Endwalzdicken of about 5 mm to about 30 mm.
  • the rolling must be made to the final rolling thickness in a rolling stand of the finishing train, which is not the last rolling stand of the finishing train, for example the penultimate or the third last rolling stand of the finishing train.
  • the following rolling stands according to the example so the last mill stand the finishing train are engaged, ie the flat rolling (usually a band) to roll.
  • finishing mills and subordinate cooling section and relatively thick strips are rolled with Endwalzdicken of about 5 mm to about 30 mm.
  • the rolling must be made to the final rolling thickness in a rolling stand of the finishing train, which is not the last rolling stand of the finishing train, for example the penultimate or the third last rolling stand of the finishing train.
  • the following rolling stands according to the example thus the last roll stand or the last and the penultimate roll stand, are traversed without deformation by the flat rolling stock.
  • finishing train has interstand cooling means, it is possible to start the cooling of the flat rolled material immediately after the last pass, so that pipe qualities of high quality can in principle also be produced in a multistage hot strip mill. This is in been tried more recently. In practice, however, this poses the following problem:
  • the temperature of the flat rolling stock is recorded between the finishing train and the cooling section at a temperature measuring station. Using the measured temperature value, a temporal or local target energy content profile is determined for the corresponding rolling stock point. On the basis of the desired energy content course, the energy influences are determined to which the corresponding rolling stock in the cooling section is subjected. Due to the intensive cooling by means of the intermediate stand cooling devices, however, the surface of the flat rolling stock is strongly cooled. Behind the relevant intermediate stand cooling device, the heat must first be transported by heat conduction from the interior of the flat rolling material on the surface. Due to the relatively large thickness of the flat rolling a relatively long period of time is required for this purpose.
  • the object of the present invention is to provide possibilities by means of which high material grades can be produced in a multistage finishing train with a downstream cooling section without requiring a measured final rolling temperature.
  • a starting value should be reliably provided for the cooling section even if a temperature measurement behind the finishing train is not usable, for example, because the cooling process is already started before the last mill stand.
  • the present invention is thus based on the finding that - with correspondingly good modeling of the energy content of the rolling stock points - the corresponding expected value can be used as at least equivalent substitute for the measurement of the final rolling temperature and the desired energy content profile can be determined on the basis of this - mathematically determined - expected value ,
  • the procedure according to the invention is of particular advantage when the flat rolling stock is in the predetermined location seen in the direction of rolling immediately upstream rolling mill is rolled to a final roll thickness and seen in the running direction is no longer rolled behind the predetermined location.
  • the predetermined location in the direction seen at least one rolling stand downstream it is possible that the predetermined location in the direction seen downstream rolling stands are driven up so that their rollers do not contact the flat rolling.
  • rolls of the corresponding rolling stands can be set against the flat rolling stock and drive the flat rolled stock without deformation.
  • intermediate structure cooling devices are arranged upstream of the predetermined location, they are alternatively active or inactive, depending on the configuration of the control method according to the invention.
  • the predetermined location is between the finishing line and the cooling section.
  • the expectation value for the energy content replaces the measured temperature value.
  • the procedure according to the invention shows its full advantages when at least one intermediate stand cooling device is arranged between the predetermined location and the last rolling stand of the finishing train, as viewed in the running direction.
  • the cooling devices of the cooling section, but also the interstand cooling devices of the finishing train downstream of the predetermined location in the direction of travel are controlled in accordance with the determined energy content influences.
  • the corresponding intermediate stand cooling devices are, so to speak, regarded as control elements as elements of the cooling section.
  • the last "active" rolling mill ie the last mill stand of the finishing mill, in which the flat rolled stock is rolled, can be arranged within the finishing train as needed.
  • the number at the predetermined location seen in the direction of downstream rolling stands is between 1 and 3.
  • the Soll energieinhaltsverlauf from the predetermined location to the expiry of the respective Walzgutituss from the cooling section can be determined as needed.
  • the desired energy content profile is preferably determined such that at least the intermediate structure cooling device immediately downstream of the predetermined location is operated with at least 80% and / or with at most 90% or 95% of its maximum possible influencing of energy content.
  • the finish roll thickness can be sized as needed. Often it is between 5 mm and 30 mm.
  • a temperature measuring station is arranged between the finishing train and the cooling section, by means of which the actual surface temperature of the rolling stock points can be detected at the location of the temperature measuring station.
  • This temperature measuring station is present in particular because in the hot strip mill - as an alternative to the mode of operation according to the invention - a "normal" rolling can also take place in which all rolling stands of the finishing train roll the flat rolling stock.
  • the surface temperature detected behind the finishing train - such as in the DE 101 56 008 A1 explained - mostly usefully usable.
  • the expected value determined for the predetermined location it is possible to determine the expected value determined for the predetermined location exclusively for determining the desired energy content profile consulted. Alternatively, it is possible that in addition the difference between a desired end roll energy content and the energy content characterized by the expected value determined for the predetermined location is used to determine control variables for the predetermined location upstream rolling stands and / or for the predetermined location upstream intermediate stand cooling devices.
  • plate can be rolled.
  • the flat rolled stock is a strip.
  • the energy content of the rolling stock points can alternatively be determined by their temperature or by their enthalpy - if necessary supplemented by the phase components of the respective Welzgutddlings.
  • the object is further achieved by a computer program of the type mentioned.
  • the computer program is designed in this case such that the control computer executes a control method with all steps of a control method according to the invention.
  • control computer for a hot strip mill for rolling a flat rolling stock made of metal which is designed such that it carries out such an operating method during operation.
  • the object is further achieved by a hot strip mill for rolling a flat rolling stock of the type mentioned, which is equipped with such a control computer.
  • FIG. 1 comprises a hot strip mill at least one finishing line 1 and a cooling section 2.
  • the cooling section 2 is downstream of the finishing train 1.
  • the finishing train 1 has a plurality of rolling stands 3.
  • a flat rolling stock 4 enters the foremost rolling stand 3 of the finishing train with an input thickness and an input energy, then successively passes through the other rolling stands 3 of the finishing train 1 and finally runs out of the last rolling stand 3 of the finishing train 1 with a final rolling thickness d.
  • the flat rolling stock 4 thus passes through the rolling stands 3 of the finishing train 1 successively in a running direction x which is uniform for all rolling stands 3 (and also the cooling section 2).
  • the number of rolling stands 3 may be determined as needed. Minimal are usually three rolling stands 3 available, a maximum of nine rolling stands 3. Usually six or seven rolling stands 3 are available.
  • Intermediate stand cooling devices 5 are preferably arranged at least between the rear rolling stands 3, by means of which the flat rolling stock 4 can be cooled with a cooling medium 6-usually water, a water-oil mixture or a water-air mixture. Alternatively or additionally, inter-frame cooling devices 5 can also be arranged between the front rolling stands 3.
  • the flat rolling stock 4 happens behind the finishing train 1 a temperature measuring station 7 and then runs in the cooling section. 2 one. In the cooling section 2, the flat rolling stock 4 is cooled by means of cooling devices 8 of the cooling section 2 to a final energy content.
  • the flat rolling stock 4 is made of metal.
  • the metal may be copper, aluminum, brass or another metal. Often the metal is steel.
  • the flat rolled stock 4 can - in the case of the material "steel” in particular - alternatively be a relatively short sheet or a considerably longer strip. In the case of a belt, the flat rolling stock 4 is wound behind the cooling section 2 to form a coil 9.
  • the hot strip mill - ie the unit of finishing line 1 and cooling section 2 - is controlled by a control computer 10.
  • the control computer 10 is programmed with a computer program 11.
  • the computer program 11 can be supplied to the control computer 10, for example via a conventional mobile data carrier, on which the computer program 11 is stored in machine-readable form.
  • the computer program 11 comprises machine code 12, which can be processed directly by the control computer 10.
  • the execution of the machine code 12 by the control computer 10 causes the control computer 10 to control the hot strip mill according to a control method which will be described below in connection with FIG FIG. 2 is described in detail.
  • the control computer 10 is thus designed such that it controls the hot strip mill accordingly.
  • control method according to the invention will be described below in connection with FIG. 2 explained for a single section 13 of the flat rolling stock 4, hereinafter referred to as considered Walzgutddling 13. However, the control method according to the invention is carried out in practice in parallel for all Walzguta 13, which are located in the hot strip mill.
  • the rolling stock sections 13 or rolling stock points 13 can be defined as such as required.
  • the rolling stock points 13 are defined by a time clock. In other words, with each time cycle enters a Walzgut Vietnamese 13 in the hot strip mill and enters another Walzgut Vietnamese 13 from the hot strip mill.
  • the timing may be, for example, between 0.1 seconds and 1.0 seconds, in particular between 0.2 seconds and 0.5 seconds, preferably at about 0.3 seconds.
  • the rolling stock points 13 may be determined, for example, by a predetermined length (for example 20 cm to 50 cm) or a predetermined mass (for example 20 kg to 50 kg) of the rolling stock 4 entering the hot strip mill.
  • the determined initial value T1 is characteristic of the energy content of the considered rolling stock point 13. In particular, it may be the temperature or the enthalpy of the considered Walzgutands 13.
  • the actual temperature of the relevant rolling stock point 13 can be detected by measurement on one of the finishing mill 1 upstream temperature measuring station 14 and used directly as the initial value T1. It is also possible to additionally determine or presuppose the phase state of the considered rolling stock point 13 and thereby determine the enthalpy.
  • the initial value is otherwise known, for example because it is disclosed to the control computer 10 by a higher-level or upstream control device.
  • the temperature or the enthalpy can be used as the quantity describing the energy content. Both sizes can be divided by phase proportions be supplemented of the corresponding Walzgutituss 13.
  • the use of the temperature has the advantage that it is easily detectable as such.
  • the enthalpy has the advantage that it is an energy-conserving quantity and therefore also detects the latent energy of the phase transformations. It is at the discretion of the skilled person which of the sizes he uses. This and also the consideration of a possible phase transformation in the context of temperature determination will not be discussed in more detail below, since these procedures and problems do not concern the core of the present invention.
  • the corresponding procedures and problems are familiar and familiar to the person skilled in the art.
  • the control computer 10 implements a model 15 for the hot strip mill due to the execution of the computer program 11.
  • the model 15 comprises mathematical-physical equations on the basis of which a given new energy content or an expected value T2 characterizing the respective energy content can be ascertained gradually given a given initial value T1 in conjunction with energy content influences ⁇ E.
  • the model 15 may include a heat equation and a phase transformation equation.
  • the heat equation can, for example, from the DE 101 29 565 A1 be known heat conduction equation, the phase transformation equation according to the teaching of EP 1 711 868 B1 be implemented.
  • the control computer 10 supplies the determined initial value T1 to the model 15 in a step S2.
  • the considered rolling stock point 13 is further followed by the control computer 10 in a step S3 when passing through the finishing train 1 and the cooling section 2.
  • the control computer 10 can receive the rolling speeds from the roll stands 3 and determine the respective actual speed of the considered rolling stock point 13 from the roll speeds in conjunction with the (known) roll diameters and the - at least substantially - known lead and lag and thus the respective position of the considered Walzgutituss 13 from time to time to update clock.
  • the corresponding path tracking leads the control computer 10 to the model 15.
  • the considered Walzgut Vietnamese Walzgut Vietnamese 13 is subjected in the finishing train 1 and the cooling section 2 Energyinhaltbeeinlungen ⁇ E.
  • the control computer 10 - rollers in the rolling stands 3 of the finishing train 1 an energy input.
  • the energy influences ⁇ E are also supplied to the model 15 by the control computer 10 in a step S4. Due to the tracking of the considered Walzgutuss 13 the control computer 10 is known whether and possibly which rolling mill 3 or if and possibly which interstand cooling device 5 and whether and possibly which cooling device 8 of the cooling section 2 just acts on the considered Walzgutddling 13.
  • the control computer 10 therefore determines by means of the model 15 in a step S5 continuously in real time the respective current energy content of the considered Walzgutins 13 or the characteristic value T2 for this characteristic.
  • the control computer 10 carries out the step S5 during the passage of the considered Walzgutituss 13 through the hot strip mill.
  • the control computer 10 thus continuously updates the respective expected value T2 on the basis of the currently valid energy content influencing ⁇ E and the immediately previously valid expected value T2. Which energy content influencing ⁇ E is to be used is determined by the control computer 10 on the basis of the tracking. Based on this approach, the control computer 10, starting from the initial value T1, the expected value T2 update step by step, so that during the passage of the respective Walzgutuss 13 through the finishing line 1 and the cooling section 2 is at any time the expected energy content of the respective Walzgutins 13 available.
  • the control computer 10 checks whether the considered rolling stock point 13 has reached a predetermined location P.
  • the predetermined location P is seen in the running direction x between the first roll stand 3 and the first cooling device 8 of the cooling section 2.
  • the predetermined location P is in the embodiment of FIG. 1 (Also) before the last mill stand 3 of the finishing train 1 and before the temperature measuring 7th
  • one, two or three rolling stands 3 can be arranged between the predetermined location P and the temperature measuring station 7.
  • This number can possibly vary from flat rolling stock 4 to flat rolling stock 4 - but not viewed Walzgut Vietnamese 13 to considered Walzgut Vietnamese 13 of the same flat rolling 4 - since the predetermined location P is a purely software technically fixed location. It may, for example, alternatively be fixed by the computer program 11 or specified to the control computer 10 from outside or determined by the control computer 10 on the basis of other circumstances.
  • step S7 the control computer 10 determines a desired energy content course E * for the considered rolling stock point 13.
  • the desired energy content course E * extends from the predetermined location P to the departure of the considered rolling stock point 13 from the cooling section 2. It can be defined, for example, as a local course (relative to the location of the considered rolling stock point 13 in the hot strip mill) or as a time profile.
  • the control computer 10 determines the desired energy content course E * in step S7 using the expected value T2 for the energy content which is currently associated with the considered rolling stock point 13, ie at the predetermined location P.
  • the control computer 10 thus determines the desired energy content course E * using the energy content that is expected for the considered rolling stock point 13 at the predetermined location P.
  • step S8 the control computer 10 determines the energy influences ⁇ E which are required in order to set the energy content of the considered rolling stock point 13 in accordance with the determined target energy content profile E *.
  • the control computer 10 thus determines in step S8 as a function of the determined target energy content course E * the energy influences ⁇ E, which the considered Walzgut Vietnamese 13 is subjected from the predetermined location P until it leaves the cooling section 2.
  • the energy content influences ⁇ E for the considered rolling stock point 13 are determined immediately, ie immediately after the determination of the desired energy content profile E *.
  • step S6 only the step S7 can be skipped in the NO branch.
  • step S8 may be modified such that in each case only the next energy content influencing ⁇ E (or the next group of such influences ⁇ E) is determined for the considered rolling stock point 13.
  • energy content influences ⁇ E for the considered Walzgut Vietnamese
  • step S9 the control computer 10 - depending on the location of the considered Walzgutins 13 in the hot strip mill - the corresponding interstand cooling device 5, the corresponding cooling device 8 of the cooling section 2 or the corresponding rolling stand 3 at.
  • the step S9 is always executed by the control computer 10, that is, both in the case that the considered Walzgut Vietnamese 13 is located in front of the predetermined location P, as well as in the case that the considered Walzgut Vietnamese 13 is located behind the predetermined location P. If the considered Walzgut Vietnamese 13 is located in front of the predetermined location P, the corresponding energy influence ⁇ E has been determined otherwise, for example, when entering the considered Walzgutits 13 in the finishing train 2 from the initial value T1 for the energy content. If, on the other hand, the considered rolling stock point 13 is behind the predetermined location P, the energy influencing ⁇ E determined in step S8 is used.
  • interstand cooling devices 5 situated in front of the predetermined location P - if present - are activated.
  • the influence of the respective interstand cooling means 5 on the Energy content of Walzguta 13 are taken into account in the modeling.
  • these interstand cooling devices 5 are inactive.
  • the intermediate stand cooling devices 5 arranged in front of the predetermined location P do not cool the flat rolling stock 4 in this case.
  • a step S10 the control computer 10 checks whether the considered rolling stock point 13 has run out of the cooling section 2. If this is the case, the procedure according to the invention for the considered rolling stock point 13 is completed.
  • the flat rolling stock 4 is rolled to a final rolling thickness d in the rolling mill 3 which is immediately upstream of the predetermined location P in the running direction x.
  • the final roll thickness d can be, for example, between 5 mm and 30 mm.
  • the flat rolling stock 4 is no longer rolled. If the rolling mill 3 are arranged downstream of the predetermined location P, the flat rolling stock 4 is therefore no longer rolled there.
  • the final roll thickness d remains rather unchanged.
  • the downstream rolling stands 3 can be ascended so that their rollers 16 do not contact the flat rolling stock 4. This is in FIG. 3 for the predetermined location P immediately downstream rolling stand 3 so shown. Alternatively, it is possible that the rollers 16 of the downstream rolling stands 3 are employed on the flat rolling stock 4, but do not roll it, but only drive it without deformation. This is in FIG. 3 for the last rolling mill 3 of the finishing train 1 shown.
  • a temperature measuring station 7 can be arranged between the finishing train 1 and the cooling section 2, by means of which the actual surface temperature TO of the rolling stock points 13 at the location of the temperature measuring station 7 can be detected. If the temperature measuring station 7 is present, various approaches are possible.
  • the corresponding surface temperatures TO it is possible to detect the corresponding surface temperatures TO and to feed them to the control computer 10. This is in FIG. 4 indicated by the solid line provided with the reference numeral 18.
  • the surface temperature TO detected for a certain rolling stock point 13 is indeed detected, but not used to determine the desired energy content profile E * of the rolling stock point 13 under consideration.
  • the line 18 is completed within the control computer 10 with a bar.
  • the detected surface temperature TO may possibly be used for other purposes, for example for adaptation of the model 15.
  • FIG. 5 shows possible additions to the steps S7 and S8 of FIG. 2 .
  • Step S8 is followed by a step S21.
  • the control computer 10 checks whether the intermediate structure cooling device 5 immediately downstream of the predetermined location P has at least 80% of its maximum possible influence on energy content with respect to the considered rolling stock 13 and / or with a maximum of 90% or at most 95% of its maximum possible influence of energy content is operated. If this is not the case, the control computer 10 goes in the embodiment of FIG. 5 to a step S22. In step S22, the control computer 10 varies the target energy content course E * accordingly.
  • steps S26 and S27 may be present.
  • the control computer 10 forms the difference between a desired Endwalzenergyinhalt T2 * and the energy content according to the expected value T2, which is determined for the considered Walzgutddling 13 at the predetermined location P.
  • the control computer 10 uses this difference to determine control variables for rolling stands 3 and / or interstand cooling devices 5, which are arranged upstream of the predetermined location P. For example, according to a control subject to deadtime, the energy content influences ⁇ E for the predetermined location P upstream intermediate structure cooling devices 5 can be readjusted or a mass flow, which of course acts on the entire hot strip line, can be tracked.
  • the present invention has many advantages.

Description

Die vorliegende Erfindung betrifft ein Steuerverfahren für eine Warmbandstraße,

  • wobei die Warmbandstraße eine Fertigstraße zum Walzen von flachem Walzgut aus Metall umfasst,
  • wobei die Fertigstraße mehrere Walzgerüste aufweist, die von dem flachen Walzgut in einer Laufrichtung nacheinander durchlaufen werden,
  • wobei die Warmbandstraße eine der Fertigstraße nachgeordnete Kühlstrecke umfasst,
  • wobei für Walzgutpunkte des flachen Walzgutes spätestens beim Einlaufen des jeweiligen Walzgutpunktes in die Fertigstraße ein den Energieinhalt des jeweiligen Walzgutpunktes charakterisierender Anfangswert ermittelt wird,
  • wobei die Anfangswerte einem Modell für die Warmbandstraße zugeführt werden,
  • wobei die Walzgutpunkte beim Durchlaufen der Fertigstraße und der Kühlstrecke wegverfolgt werden,
  • wobei die Wegverfolgungen und Energieinhaltbeeinflussungen, denen die Walzgutpunkte in der Fertigstraße und der Kühlstrecke unterworfen werden, ebenfalls dem Modell zugeführt werden,
  • wobei von dem Steuerrechner mittels des Modells anhand der Anfangswerte, der Wegverfolgungen und der Energieinhaltbeeinflussungen während des Durchlaufs der Walzgutpunkte durch die Warmbandstraße kontinuierlich in Echtzeit den jeweils aktuellen Energieinhalt der die Warmbandstraße durchlaufenden Walzgutpunkte charakterisierende Erwartungswerte der Walzgutpunkte ermittelt werden.
The present invention relates to a control method for a hot strip mill,
  • the hot strip mill comprising a finishing train for rolling flat metal stock,
  • wherein the finishing train has a plurality of rolling stands, which are passed through in succession by the flat rolling stock,
  • wherein the hot strip mill comprises a cooling section downstream of the finishing line,
  • wherein an initial value characterizing the energy content of the respective rolling stock point is determined for rolled material points of the flat rolling stock at the latest when the respective rolling stock point enters the finishing train,
  • wherein the initial values are supplied to a model for the hot strip mill,
  • wherein the rolling stock points are traced while passing through the finishing train and the cooling section,
  • wherein the track-following and energy content influences to which the rolling stock points in the finishing train and the cooling section are subjected are also fed to the model,
  • wherein the control computer uses the model based on the initial values, the track pursuits and the energy content influences during the passage of the rolling stock points through the hot strip mill continuously in real time the respective current energy content of the Walzgut points passing through the hot strip mill expectation values of the rolling stock points are determined.

Die vorliegende Erfindung betrifft weiterhin ein Computerprogramm, das Maschinencode umfasst, der von einem Steuerrechner für eine Warmbandstraße zum Walzen eines flachen Walzgutes aus Metall unmittelbar abarbeitbar ist und dessen Abarbeitung durch den Steuerrechner bewirkt, dass der Steuerrechner die Warmbandstraße gemäß einem derartigen Betriebsverfahren betreibt.The present invention further relates to a computer program comprising machine code, which is directly abarbeitbar by a control computer for a hot strip mill for rolling a flat rolled metal and whose processing by the control computer causes the control computer the Hot strip mill operates according to such an operating method.

Die vorliegende Erfindung betrifft weiterhin einen Steuerrechner für eine Warmbandstraße zum Walzen eines flachen Walzgutes aus Metall, wobei der Steuerrechner derart ausgebildet ist, dass er die Warmbandstraße gemäß einem derartigen Betriebsverfahren betreibt.The present invention further relates to a control circuit for a hot strip mill for rolling a flat rolled material of metal, wherein the control computer is designed such that it operates the hot strip mill according to such an operating method.

Die vorliegende Erfindung betrifft weiterhin eine Warmbandstraße zum Walzen eines flachen Walzgutes aus Metall,

  • wobei die Warmbandstraße eine Fertigstraße zum Walzen des flachen Walzgutes umfasst,
  • wobei die Fertigstraße mehrere Walzgerüste aufweist, die von dem flachen Walzgut in einer Laufrichtung nacheinander durchlaufen werden,
  • wobei die Warmbandstraße eine der Fertigstraße nachgeordnete Kühlstrecke umfasst,
  • wobei die Warmbandstraße mit einem derartigen Steuerrechner ausgestattet ist.
The present invention further relates to a hot strip mill for rolling a flat rolled stock of metal,
  • wherein the hot strip mill comprises a finishing train for rolling the flat rolled stock,
  • wherein the finishing train has a plurality of rolling stands, which are passed through in succession by the flat rolling stock,
  • wherein the hot strip mill comprises a cooling section downstream of the finishing line,
  • wherein the hot strip mill is equipped with such a control computer.

Derartige Gegenstände sind allgemein bekannt. Rein beispielhaft wird auf die DE 101 56 008 A1 und die korrespondierende US 7 197 802 B2 verwiesen. Der Oberbegriff von Anspruch 1 basiert auf der DE 101 56 008 A1 .Such objects are well known. Purely by way of example is on the DE 101 56 008 A1 and the corresponding one US 7 197 802 B2 directed. The preamble of claim 1 is based on DE 101 56 008 A1 ,

Aus der EP 2 301 685 A1 ist ein gleichgelagerter Offenbarungsgehalt bekannt. Bei der EP 2 301 685 A1 kann zum Ermitteln des den Energieinhalt des jeweiligen Walzpunktes charakterisierenden Anfangswertes die Temperatur des entsprechenden Walzpunktes messtechnisch erfasst werden. Der Temperaturverlauf über die Dicke des Walzguts kann über ein Modell ermittelt werden. Weiterhin kann ein Sollenergieinhaltsverlauf ermittelt werden, der bei der Ermittlung der Energieinhaltsbeeinflussungen, denen der jeweilige Walzgutpunkt unterworfen wird, berücksichtigt wird.From the EP 2 301 685 A1 is an equivalent stored disclosure content known. In the EP 2 301 685 A1 For determining the initial value characterizing the energy content of the respective rolling point, the temperature of the corresponding rolling point can be detected by measurement. The temperature profile over the thickness of the rolling stock can be determined by a model. Furthermore, a desired energy content profile can be determined, which is taken into account when determining the energy content influences to which the respective rolling stock point is subjected.

Das bekannte Steuerverfahren arbeitet sehr gut, wenn relativ dünnes Bandmaterial gewalzt wird, so dass alle Walzgerüste der Fertigstraße in Eingriff sind, d.h. das flache Walzgut (meist ein Band) walzen.The known control method works very well when relatively thin strip material is rolled, so that all rolling stands the finishing train are engaged, ie the flat rolling (usually a band) to roll.

In Fertigstraßen nebst nachgeordneter Kühlstrecke werden auch relativ dicke Bänder (sogenannte Rohrgüten) mit Endwalzdicken von ca. 5 mm bis ca. 30 mm gewalzt. In einem derartigen Fall muss das Walzen auf die Endwalzdicke in einem Walzgerüst der Fertigstraße erfolgen, welches nicht das letzte Walzgerüst der Fertigstraße ist, beispielsweise das vorletzte oder das drittletzte Walzgerüst der Fertigstraße. Die nachfolgenden Walzgerüste, gemäß dem Beispiel also das letzte Walzgerüst der Fertigstraße in Eingriff sind, d.h. das flache Walzgut (meist ein Band) walzen.In finishing mills and subordinate cooling section and relatively thick strips (so-called pipe grades) are rolled with Endwalzdicken of about 5 mm to about 30 mm. In such a case, the rolling must be made to the final rolling thickness in a rolling stand of the finishing train, which is not the last rolling stand of the finishing train, for example the penultimate or the third last rolling stand of the finishing train. The following rolling stands, according to the example so the last mill stand the finishing train are engaged, ie the flat rolling (usually a band) to roll.

In Fertigstraßen nebst nachgeordneter Kühlstrecke werden auch relativ dicke Bänder (sogenannte Rohrgüten) mit Endwalzdicken von ca. 5 mm bis ca. 30 mm gewalzt. In einem derartigen Fall muss das Walzen auf die Endwalzdicke in einem Walzgerüst der Fertigstraße erfolgen, welches nicht das letzte Walzgerüst der Fertigstraße ist, beispielsweise das vorletzte oder das drittletzte Walzgerüst der Fertigstraße. Die nachfolgenden Walzgerüste, gemäß dem Beispiel also das letzte Walzgerüst oder das letzte und das vorletzte Walzgerüst, werden von dem flachen Walzgut umformungsfrei durchlaufen.In finishing mills and subordinate cooling section and relatively thick strips (so-called pipe grades) are rolled with Endwalzdicken of about 5 mm to about 30 mm. In such a case, the rolling must be made to the final rolling thickness in a rolling stand of the finishing train, which is not the last rolling stand of the finishing train, for example the penultimate or the third last rolling stand of the finishing train. The following rolling stands, according to the example thus the last roll stand or the last and the penultimate roll stand, are traversed without deformation by the flat rolling stock.

Zur Herstellung von Rohrgüten ist es zur Erzielung günstiger Materialeigenschaften - insbesondere hoher Zähigkeit und Festigkeit auch bei tiefen Umgebungstemperaturen - erforderlich, mit der Kühlung so früh wie möglich zu beginnen und die Kühlung rasch durchzuführen. Wird mit dem Kühlen des flachen Walzgutes erst begonnen, wenn dieses in die der Fertigstraße nachgeordnete Kühlstrecke einläuft, vergeht vom Ende des Walzens bis zum Beginn der Kühlung eine relativ lange Zeit. Dies hat negativen Einfluss auf die erreichbaren Materialeigenschaften des flachen Walzgutes.For the production of pipe grades, it is to achieve favorable material properties - especially high toughness and strength even at low ambient temperatures - required to start with the cooling as early as possible and perform the cooling quickly. If the cooling of the flat rolling stock is only started when it enters the downstream section of the cooling line, a relatively long time passes from the end of the rolling until the beginning of the cooling. This has a negative influence on the achievable material properties of the flat rolling stock.

Aus diesem Grund werden Rohrgüten im Stand der Technik üblicherweise in Reversierwalzwerken gewalzt. Reversierwalzwerke weisen nur ein einziges Walzgerüst auf, manchmal auch zwei Walzgerüste. Das flache Walzgut wird im Reversierwalzwerk reversierend gewalzt. Unmittelbar nach dem letzten Walzstich wird sofort mit dem Kühlen begonnen.For this reason, pipe grades in the prior art are usually rolled in reversing rolling mills. Reversing mills have only a single rolling stand, sometimes even two rolling mills. The flat rolling stock is reversibly rolled in the reversing mill. Immediately after the last pass, cooling is started immediately.

Falls die Fertigstraße Zwischengerüstkühleinrichtungen aufweist, ist es möglich, mit dem Kühlen des flachen Walzgutes bereits unmittelbar nach dem letzten Walzstich zu beginnen, so dass prinzipiell auch in einer mehrgerüstigen Warmbandstraße Rohrgüten hoher Qualität herstellbar sind. Dies ist in jüngerer Zeit versucht worden. In der Praxis stellt sich hierbei jedoch folgendes Problem:If the finishing train has interstand cooling means, it is possible to start the cooling of the flat rolled material immediately after the last pass, so that pipe qualities of high quality can in principle also be produced in a multistage hot strip mill. This is in been tried more recently. In practice, however, this poses the following problem:

Im Stand der Technik wird zwischen der Fertigstraße und der Kühlstrecke an einem Temperaturmessplatz die Temperatur des flachen Walzgutes erfasst. Unter Verwendung des gemessenen Temperaturwertes wird für den entsprechenden Walzgutpunkt ein - zeitlicher oder örtlicher - Sollenergieinhaltsverlauf bestimmt. Anhand des Sollenergieinhaltsverlaufs werden die Energiebeeinflussungen ermittelt, denen der entsprechende Walzgutpunkt in der Kühlstrecke unterworfen wird. Aufgrund der intensiven Kühlung mittels der Zwischengerüstkühleinrichtungen wird jedoch die Oberfläche des flachen Walzgutes stark abgekühlt. Hinter der betreffenden Zwischengerüstkühleinrichtung muss die Wärme erst wieder durch Wärmeleitung aus dem Inneren des flachen Walzgutes an dessen Oberfläche transportiert werden. Aufgrund der relativ großen Dicke des flachen Walzgutes wird hierfür eine relativ lange Zeitspanne benötigt. Aus diesem Grund liegt am Temperaturmessplatz hinter der Fertigstraße noch kein ausgeglichener Temperaturzustand im flachen Walzgut vor. Die Temperaturmessung hinter der Fertigstraße wird daher unbrauchbar. Dadurch wird die Genauigkeit, mit welcher die Haspeltemperatur hinter der Kühlstrecke eingestellt und eingehalten werden kann, negativ beeinflusst.In the prior art, the temperature of the flat rolling stock is recorded between the finishing train and the cooling section at a temperature measuring station. Using the measured temperature value, a temporal or local target energy content profile is determined for the corresponding rolling stock point. On the basis of the desired energy content course, the energy influences are determined to which the corresponding rolling stock in the cooling section is subjected. Due to the intensive cooling by means of the intermediate stand cooling devices, however, the surface of the flat rolling stock is strongly cooled. Behind the relevant intermediate stand cooling device, the heat must first be transported by heat conduction from the interior of the flat rolling material on the surface. Due to the relatively large thickness of the flat rolling a relatively long period of time is required for this purpose. For this reason, there is still no balanced temperature condition in the flat rolling stock at the temperature measuring station behind the finishing train. The temperature measurement behind the finishing train is therefore unusable. As a result, the accuracy with which the reel temperature can be set and maintained behind the cooling section is adversely affected.

Eventuell könnte es möglich sein, dem erfassten Temperaturmesswert einen Offset aufzuschalten und so zu einem in etwa korrekten Sollenergieinhaltsverlauf zu gelangen. Diese Vorgehensweise ist jedoch mit erheblichen Unsicherheiten und Ungenauigkeiten behaftet.It may possibly be possible to apply an offset to the detected temperature measured value and thus arrive at an approximately correct desired energy content profile. However, this procedure is subject to considerable uncertainties and inaccuracies.

Die Aufgabe der vorliegenden Erfindung besteht darin, Möglichkeiten zu schaffen, mittels derer in einer mehrgerüstigen Fertigstraße mit nachgeordneter Kühlstrecke hohe Materialgüten hergestellt werden können, ohne eine gemessene Endwalztemperatur zu benötigen. Insbesondere soll für die Kühlstrecke zuverlässig ein Startwert auch dann bereitgestellt werden können, wenn eine Temperaturmessung hinter der Fertigstraße nicht verwertbar ist, beispielsweise weil der Kühlvorgang bereits vor dem letzten Walzgerüst begonnen wird.The object of the present invention is to provide possibilities by means of which high material grades can be produced in a multistage finishing train with a downstream cooling section without requiring a measured final rolling temperature. In particular, a starting value should be reliably provided for the cooling section even if a temperature measurement behind the finishing train is not usable, for example, because the cooling process is already started before the last mill stand.

Die Aufgabe wird durch ein Steuerverfahren für eine Warmbandstraße mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen des Betriebsverfahrens sind Gegenstand der abhängigen Ansprüche 2 bis 12.The object is achieved by a control method for a hot strip mill with the features of claim 1. Advantageous embodiments of the operating method are the subject of the dependent claims 2 to 12.

Erfindungsgemäß ist vorgesehen, ein Steuerverfahren der eingangs genannten Art dadurch auszugestalten,

  • dass für die Walzgutpunkte unter Verwendung desjenigen Energieinhalts, der für sie an einem vorbestimmten Ort erwartet wird, ein Sollenergieinhaltsverlauf von dem vorbestimmten Ort bis zum Auslaufen des jeweiligen Walzgutpunktes aus der Kühlstrecke ermittelt wird,
  • dass der vorbestimmte Ort in Laufrichtung gesehen zwischen dem ersten Walzgerüst und der ersten Kühleinrichtung der Kühlstrecke liegt,
  • dass die Energieinhaltbeeinflussungen, denen die Walzgutpunkte ab dem vorbestimmten Ort bis zum Auslaufen des jeweiligen Walzgutpunktes aus der Kühlstrecke unterworfen werden, in Abhängigkeit von dem ermittelten Sollenergieinhaltsverlauf ermittelt werden und
  • dass die dem vorbestimmten Ort in Laufrichtung gesehen nachgeordneten Kühleinrichtungen entsprechend den ermittelten Energieinhaltbeeinflussungen angesteuert werden.
According to the invention, it is intended to design a control method of the type mentioned at the outset,
  • for the rolling stock points being determined using the energy content that is expected for them at a predetermined location, a desired energy content course from the predetermined location until the expiry of the respective rolling stock point from the cooling section,
  • that the predetermined location seen in the running direction between the first rolling mill and the first cooling device of the cooling section,
  • that the energy content influences, which are subjected to the rolling stock points from the predetermined location until the expiry of the respective rolling stock point from the cooling section, are determined as a function of the determined desired energy content profile and
  • that the downstream of the predetermined location seen in the direction of cooling devices are controlled according to the determined energy content influences.

Der vorliegenden Erfindung liegt somit die Erkenntnis zugrunde, dass - bei entsprechend guter Modellierung des Energieinhalts der Walzgutpunkte - der entsprechende Erwartungswert als mindestens gleichwertiger Ersatz für die Messung der Endwalztemperatur herangezogen werden kann und der Sollenergieinhaltsverlauf ausgehend von diesem - rein rechnerisch ermittelten - Erwartungswert ermittelt werden kann.The present invention is thus based on the finding that - with correspondingly good modeling of the energy content of the rolling stock points - the corresponding expected value can be used as at least equivalent substitute for the measurement of the final rolling temperature and the desired energy content profile can be determined on the basis of this - mathematically determined - expected value ,

Die erfindungsgemäße Vorgehensweise ist vor allem dann von Vorteil, wenn das flache Walzgut in dem dem vorbestimmten Ort in Laufrichtung gesehen unmittelbar vorgeordneten Walzgerüst auf eine Endwalzdicke gewalzt wird und in Laufrichtung gesehen hinter dem vorbestimmten Ort nicht mehr gewalzt wird.The procedure according to the invention is of particular advantage when the flat rolling stock is in the predetermined location seen in the direction of rolling immediately upstream rolling mill is rolled to a final roll thickness and seen in the running direction is no longer rolled behind the predetermined location.

Falls dem vorbestimmten Ort in Laufrichtung gesehen mindestens ein Walzgerüst nachgeordnet ist, ist es möglich, dass die dem vorbestimmten Ort in Laufrichtung gesehen nachgeordneten Walzgerüste aufgefahren sind, so dass ihre Walzen das flache Walzgut nicht kontaktieren. Alternativ können Walzen der entsprechenden Walzgerüste an das flache Walzgut angestellt sein und das flache Walzgut umformungsfrei treiben.If the predetermined location in the direction seen at least one rolling stand downstream, it is possible that the predetermined location in the direction seen downstream rolling stands are driven up so that their rollers do not contact the flat rolling. Alternatively, rolls of the corresponding rolling stands can be set against the flat rolling stock and drive the flat rolled stock without deformation.

Falls dem vorbestimmten Ort in Laufrichtung gesehen Zwischengerüstkühleinrichtungen vorgeordnet sind, sind diese - je nach Ausgestaltung des erfindungsgemäßen Steuerverfahrens - alternativ aktiv oder inaktiv.If intermediate structure cooling devices are arranged upstream of the predetermined location, they are alternatively active or inactive, depending on the configuration of the control method according to the invention.

Es ist möglich, dass der vorbestimmte Ort zwischen der Fertigstraße und der Kühlstrecke liegt. In diesem Fall ersetzt der Erwartungswert für den Energieinhalt den gemessenen Temperaturwert. Bereits dies kann von Vorteil sein, beispielsweise dann, wenn der Erwartungswert die Enthalpie ist und die Phasenumwandlung von Austenit in Ferrit und Zementit bereits vor dem vorbestimmten Ort begonnen hat. Ihre vollen Vorteile zeigt die erfindungsgemäße Vorgehensweise jedoch dann, wenn zwischen dem vorbestimmten Ort und dem in Laufrichtung gesehen letzten Walzgerüst der Fertigstraße mindestens eine Zwischengerüstkühleinrichtung angeordnet ist. In diesem Fall werden nicht nur die Kühleinrichtungen der Kühlstrecke, sondern auch die dem vorbestimmten Ort in Laufrichtung gesehen nachgeordneten Zwischengerüstkühleinrichtungen der Fertigstraße entsprechend den ermittelten Energieinhaltbeeinflussungen angesteuert. Die entsprechenden Zwischengerüstkühleinrichtungen werden in diesem Fall sozusagen steuerungstechnisch als Elemente der Kühlstrecke angesehen.It is possible that the predetermined location is between the finishing line and the cooling section. In this case, the expectation value for the energy content replaces the measured temperature value. This can already be advantageous, for example if the expected value is the enthalpy and the phase transformation of austenite into ferrite and cementite has already begun before the predetermined location. However, the procedure according to the invention shows its full advantages when at least one intermediate stand cooling device is arranged between the predetermined location and the last rolling stand of the finishing train, as viewed in the running direction. In this case, not only the cooling devices of the cooling section, but also the interstand cooling devices of the finishing train downstream of the predetermined location in the direction of travel are controlled in accordance with the determined energy content influences. In this case, the corresponding intermediate stand cooling devices are, so to speak, regarded as control elements as elements of the cooling section.

Das letzte "aktives" Walzgerüst, also das letzte Walzgerüst der Fertigstraße, in dem das flache Walzgut gewalzt wird, kann innerhalb der Fertigstraße nach Bedarf angeordnet sein. In der Regel liegt die Anzahl an dem vorbestimmten Ort in Laufrichtung gesehen nachgeordneten Walzgerüsten zwischen 1 und 3.The last "active" rolling mill, ie the last mill stand of the finishing mill, in which the flat rolled stock is rolled, can be arranged within the finishing train as needed. In general, the number at the predetermined location seen in the direction of downstream rolling stands is between 1 and 3.

Der Sollenergieinhaltsverlauf von dem vorbestimmten Ort bis zum Auslaufen des jeweiligen Walzgutpunktes aus der Kühlstrecke kann nach Bedarf bestimmt sein. Vorzugsweise wird der Sollenergieinhaltsverlauf derart ermittelt, dass zumindest die dem vorbestimmten Ort unmittelbar nachgeordnete Zwischengerüstkühleinrichtung mit mindestens 80 % und/oder mit maximal 90 % oder 95 % ihrer maximal möglichen Energieinhaltbeeinflussung betrieben wird.The Sollenergieinhaltsverlauf from the predetermined location to the expiry of the respective Walzgutpunktes from the cooling section can be determined as needed. The desired energy content profile is preferably determined such that at least the intermediate structure cooling device immediately downstream of the predetermined location is operated with at least 80% and / or with at most 90% or 95% of its maximum possible influencing of energy content.

Die Endwalzdicke kann nach Bedarf bemessen sein. Oftmals liegt sie zwischen 5 mm und 30 mm.The finish roll thickness can be sized as needed. Often it is between 5 mm and 30 mm.

In der Regel ist zwischen der Fertigstraße und der Kühlstrecke ein Temperaturmessplatz angeordnet, mittels dessen die tatsächliche Oberflächentemperatur der Walzgutpunkte am Ort des Temperaturmessplatzes erfassbar ist. Dieser Temperaturmessplatz ist insbesondere deshalb vorhanden, weil in der Warmbandstraße - alternativ zur erfindungsgemäßen Betriebsweise - auch ein "normales" Walzen erfolgen kann, bei dem alle Walzgerüste der Fertigstraße das flache Walzgut walzen. Im Rahmen derartiger konventioneller Vorgehensweisen ist die hinter der Fertigstraße erfasste Oberflächentemperatur - wie beispielsweise auch in der DE 101 56 008 A1 erläutert - meist sinnvoll verwertbar. Im Rahmen der erfindungsgemäßen Vorgehensweise hingegen wird entweder die tatsächliche Oberflächentemperatur der Walzgutpunkte am Ort des Temperaturmessplatzes nicht erfasst oder die tatsächliche Oberflächentemperatur der Walzgutpunkte am Ort des Temperaturmessplatzes wird zwar erfasst, aber nicht zur Bestimmung des Sollenergieinhaltsverlaufs herangezogen.As a rule, a temperature measuring station is arranged between the finishing train and the cooling section, by means of which the actual surface temperature of the rolling stock points can be detected at the location of the temperature measuring station. This temperature measuring station is present in particular because in the hot strip mill - as an alternative to the mode of operation according to the invention - a "normal" rolling can also take place in which all rolling stands of the finishing train roll the flat rolling stock. In the context of such conventional procedures, the surface temperature detected behind the finishing train - such as in the DE 101 56 008 A1 explained - mostly usefully usable. In the context of the procedure according to the invention, on the other hand, either the actual surface temperature of the rolling stock at the location of the temperature measuring point is not detected or the actual surface temperature of the rolling stock at the location of the temperature measuring point is detected, but not used for determining the target energy content profile.

Es ist möglich, den für den vorbestimmten Ort ermittelten Erwartungswert ausschließlich zur Ermittlung des Sollenergieinhaltsverlaufs heranzuziehen. Alternativ ist es möglich, dass zusätzlich die Differenz zwischen einem gewünschten Endwalzenergieinhalt und dem durch den für den vorbestimmten Ort ermittelten Erwartungswert charakterisierten Energieinhalt zur Ermittlung von Steuergrößen für dem vorbestimmten Ort vorgeordnete Walzgerüste und/oder für dem vorbestimmten Ort vorgeordnete Zwischengerüstkühleinrichtungen herangezogen wird.It is possible to determine the expected value determined for the predetermined location exclusively for determining the desired energy content profile consulted. Alternatively, it is possible that in addition the difference between a desired end roll energy content and the energy content characterized by the expected value determined for the predetermined location is used to determine control variables for the predetermined location upstream rolling stands and / or for the predetermined location upstream intermediate stand cooling devices.

Als flaches Walzgut kann Grobblech ("plate") gewalzt werden. Vorzugsweise ist das flache Walzgut jedoch ein Band ("strip").As flat rolling stock, plate can be rolled. Preferably, however, the flat rolled stock is a strip.

Der Energieinhalt der Walzgutpunkte kann alternativ durch deren Temperatur oder durch deren Enthalpie - ggf. ergänzt durch die Phasenanteile des jeweiligen Welzgutpunkts - bestimmt sein.The energy content of the rolling stock points can alternatively be determined by their temperature or by their enthalpy - if necessary supplemented by the phase components of the respective Welzgutpunkts.

Die Aufgabe wird weiterhin durch ein Computerprogramm der eingangs genannten Art gelöst. Das Computerprogramm ist in diesem Fall derart ausgestaltet, dass der Steuerrechner ein Steuerverfahren mit allen Schritten eines erfindungsgemäßen Steuerverfahrens ausführt.The object is further achieved by a computer program of the type mentioned. The computer program is designed in this case such that the control computer executes a control method with all steps of a control method according to the invention.

Die Aufgabe wird weiterhin durch einen Steuerrechner für eine Warmbandstraße zum Walzen eines flachen Walzgutes aus Metall gelöst, der derart ausgebildet ist, dass er im Betrieb ein derartiges Betriebsverfahren ausführt.The object is further achieved by a control computer for a hot strip mill for rolling a flat rolling stock made of metal, which is designed such that it carries out such an operating method during operation.

Die Aufgabe wird weiterhin durch eine Warmbandstraße zum Walzen eines flachen Walzgutes der eingangs genannten Art gelöst, die mit einem derartigen Steuerrechner ausgestattet ist.The object is further achieved by a hot strip mill for rolling a flat rolling stock of the type mentioned, which is equipped with such a control computer.

Die oben beschriebenen Eigenschaften, Merkmale und Vorteile dieser Erfindung sowie die Art und Weise, wie diese erreicht werden, werden klarer und deutlicher verständlich im Zusammenhang mit der folgenden Beschreibung der Ausführungsbeispiele, die in Verbindung mit den Zeichnungen näher erläutert werden. Hierbei zeigen

FIG 1
schematisch eine Warmbandstraße,
FIG 2
ein Ablaufdiagramm,
FIG 3
einen Ausschnitt einer Fertigstraße,
FIG 4
einen Übergang von einer Fertigstraße zu einer Kühlstrecke und
FIG 5
ein Ablaufdiagramm.
The above-described characteristics, features and advantages of this invention, as well as the manner in which they are achieved, will become clearer and more clearly understood in connection with the following description of the embodiments, which are explained in more detail in conjunction with the drawings. Show here
FIG. 1
schematically a hot strip mill,
FIG. 2
a flow chart,
FIG. 3
a section of a finishing train,
FIG. 4
a transition from a finishing train to a cooling section and
FIG. 5
a flowchart.

Gemäß FIG 1 umfasst eine Warmbandstraße zumindest eine Fertigstraße 1 und eine Kühlstrecke 2. Die Kühlstrecke 2 ist der Fertigstraße 1 nachgeordnet. Die Fertigstraße 1 weist mehrere Walzgerüste 3 auf. Ein flaches Walzgut 4 läuft mit einer Eingangsdicke und einer Eingangsenergie in das vorderste Walzgerüst 3 der Fertigstraße ein, durchläuft sodann nacheinander die anderen Walzgerüste 3 der Fertigstraße 1 und läuft schließlich mit einer Endwalzdicke d aus dem letzten Walzgerüst 3 der Fertigstraße 1 aus. Das flache Walzgut 4 durchläuft also die Walzgerüste 3 der Fertigstraße 1 nacheinander in einer für alle Walzgerüste 3 (und auch die Kühlstrecke 2) einheitlichen Laufrichtung x.According to FIG. 1 comprises a hot strip mill at least one finishing line 1 and a cooling section 2. The cooling section 2 is downstream of the finishing train 1. The finishing train 1 has a plurality of rolling stands 3. A flat rolling stock 4 enters the foremost rolling stand 3 of the finishing train with an input thickness and an input energy, then successively passes through the other rolling stands 3 of the finishing train 1 and finally runs out of the last rolling stand 3 of the finishing train 1 with a final rolling thickness d. The flat rolling stock 4 thus passes through the rolling stands 3 of the finishing train 1 successively in a running direction x which is uniform for all rolling stands 3 (and also the cooling section 2).

Die Anzahl an Walzgerüsten 3 kann nach Bedarf bestimmt sein. Minimal sind in der Regel drei Walzgerüste 3 vorhanden, maximal neun Walzgerüste 3. Üblicherweise sind sechs oder sieben Walzgerüste 3 vorhanden.The number of rolling stands 3 may be determined as needed. Minimal are usually three rolling stands 3 available, a maximum of nine rolling stands 3. Usually six or seven rolling stands 3 are available.

Vorzugsweise sind zumindest zwischen den hinteren Walzgerüsten 3 Zwischengerüstkühleinrichtungen 5 angeordnet, mittels derer das flache Walzgut 4 mit einem Kühlmedium 6 - meistens Wasser, ein Wasser-Öl-Gemisch oder ein Wasser-Luft-Gemisch - gekühlt werden kann. Alternativ oder zusätzlich können auch zwischen den vorderen Walzgerüsten 3 Zwischengerüstkühleinrichtungen 5 angeordnet sein.Intermediate stand cooling devices 5 are preferably arranged at least between the rear rolling stands 3, by means of which the flat rolling stock 4 can be cooled with a cooling medium 6-usually water, a water-oil mixture or a water-air mixture. Alternatively or additionally, inter-frame cooling devices 5 can also be arranged between the front rolling stands 3.

Das flache Walzgut 4 passiert hinter der Fertigstraße 1 einen Temperaturmessplatz 7 und läuft sodann in die Kühlstrecke 2 ein. In der Kühlstrecke 2 wird das flache Walzgut 4 mittels Kühleinrichtungen 8 der Kühlstrecke 2 auf einen Endenergieinhalt abgekühlt.The flat rolling stock 4 happens behind the finishing train 1 a temperature measuring station 7 and then runs in the cooling section. 2 one. In the cooling section 2, the flat rolling stock 4 is cooled by means of cooling devices 8 of the cooling section 2 to a final energy content.

Das flache Walzgut 4 besteht aus Metall. Es kann sich bei dem Metall um Kupfer, Aluminium, Messing oder ein anderes Metall handeln. Oftmals ist das Metall Stahl. Das flache Walzgut 4 kann - insbesondere im Falle des Materials "Stahl" - alternativ ein relativ kurzes Blech oder ein erheblich längeres Band sein. Im Falle eines Bandes wird das flache Walzgut 4 hinter der Kühlstrecke 2 zu einem Bund (coil) 9 aufgehaspelt.The flat rolling stock 4 is made of metal. The metal may be copper, aluminum, brass or another metal. Often the metal is steel. The flat rolled stock 4 can - in the case of the material "steel" in particular - alternatively be a relatively short sheet or a considerably longer strip. In the case of a belt, the flat rolling stock 4 is wound behind the cooling section 2 to form a coil 9.

Die Warmbandstraße - also die Einheit von Fertigstraße 1 und Kühlstrecke 2 - wird von einem Steuerrechner 10 gesteuert. Der Steuerrechner 10 ist mit einem Computerprogramm 11 programmiert. Das Computerprogramm 11 kann dem Steuerrechner 10 beispielsweise über einen üblichen mobilen Datenträger, auf dem das Computerprogramm 11 in maschinenlesbarer Form gespeichert ist, zugeführt werden.The hot strip mill - ie the unit of finishing line 1 and cooling section 2 - is controlled by a control computer 10. The control computer 10 is programmed with a computer program 11. The computer program 11 can be supplied to the control computer 10, for example via a conventional mobile data carrier, on which the computer program 11 is stored in machine-readable form.

Das Computerprogramm 11 umfasst Maschinencode 12, der von dem Steuerrechner 10 unmittelbar abarbeitbar ist. Die Abarbeitung des Maschinencodes 12 durch den Steuerrechner 10 bewirkt, dass der Steuerrechner 10 die Warmbandstraße gemäß einem Steuerverfahren steuert, das nachfolgend in Verbindung mit FIG 2 detailliert beschrieben wird. Durch die Programmierung mit dem Computerprogramm 11 wird der Steuerrechner 10 somit derart ausgebildet, dass er die Warmbandstraße entsprechend steuert.The computer program 11 comprises machine code 12, which can be processed directly by the control computer 10. The execution of the machine code 12 by the control computer 10 causes the control computer 10 to control the hot strip mill according to a control method which will be described below in connection with FIG FIG. 2 is described in detail. By programming with the computer program 11, the control computer 10 is thus designed such that it controls the hot strip mill accordingly.

Das erfindungsgemäße Steuerverfahren wird nachfolgend in Verbindung mit FIG 2 für einen einzelnen Abschnitt 13 des flachen Walzgutes 4 erläutert, nachfolgend als betrachteter Walzgutpunkt 13 bezeichnet. Das erfindungsgemäße Steuerverfahren wird jedoch in der Praxis parallel für alle Walzgutpunkte 13 ausgeführt, die sich in der Warmbandstraße befinden.The control method according to the invention will be described below in connection with FIG. 2 explained for a single section 13 of the flat rolling stock 4, hereinafter referred to as considered Walzgutpunkt 13. However, the control method according to the invention is carried out in practice in parallel for all Walzgutpunkte 13, which are located in the hot strip mill.

Die Walzgutabschnitte 13 bzw. Walzgutpunkte 13 können als solche nach Bedarf definiert sein. In der Regel sind die Walzgutpunkte 13 durch einen Zeittakt definiert. Mit anderen Worten: Mit jedem Zeittakt tritt ein Walzgutpunkt 13 in die Warmbandstraße ein und tritt ein anderer Walzgutpunkt 13 aus der Warmbandstraße aus. Der Zeittakt kann beispielsweise zwischen 0,1 Sekunden und 1,0 Sekunden liegen, insbesondere zwischen 0,2 Sekunden und 0,5 Sekunden, vorzugsweise bei ca. 0,3 Sekunden. In analoger Weise können die Walzgutpunkte 13 beispielsweise durch eine vorbestimmte Länge (beispielsweise 20 cm bis 50 cm) oder eine vorbestimmte Masse (beispielsweise 20 kg bis 50 kg) des in die Warmbandstraße einlaufenden Walzgutes 4 bestimmt sein.The rolling stock sections 13 or rolling stock points 13 can be defined as such as required. In general, the rolling stock points 13 are defined by a time clock. In other words, with each time cycle enters a Walzgutpunkt 13 in the hot strip mill and enters another Walzgutpunkt 13 from the hot strip mill. The timing may be, for example, between 0.1 seconds and 1.0 seconds, in particular between 0.2 seconds and 0.5 seconds, preferably at about 0.3 seconds. In an analogous manner, the rolling stock points 13 may be determined, for example, by a predetermined length (for example 20 cm to 50 cm) or a predetermined mass (for example 20 kg to 50 kg) of the rolling stock 4 entering the hot strip mill.

Gemäß FIG 2 wird vom Steuerrechner 10 in einem Schritt S1 spätestens beim Einlaufen des betrachteten Walzgutpunktes 13 in die Fertigstraße 1 ein Anfangswert T1 ermittelt. Der ermittelte Anfangswert T1 ist für den Energieinhalt des betrachteten Walzgutpunktes 13 charakteristisch. Insbesondere kann es sich um die Temperatur oder die Enthalpie des betrachteten Walzgutpunktes 13 handeln. Beispielsweise kann an einem der Fertigstraße 1 vorgeordneten Temperaturmessplatz 14 die Isttemperatur des betreffenden Walzgutpunktes 13 messtechnisch erfasst werden und direkt als Anfangswert T1 verwendet werden. Ebenso ist es möglich, zusätzlich den Phasenzustand des betrachteten Walzgutpunktes 13 zu ermitteln oder vorauszusetzen und dadurch die Enthalpie zu ermitteln. Beispielsweise kann im Falle von Stahl bei einer (typischen) erfassten Temperatur von ca. 1100°C ohne Weiteres angenommen werden, dass das Walzgut 4 sich vollständig in der Phase "Austenit" befindet. Ebenso ist es möglich, dass der Anfangswert anderweitig bekannt ist, beispielsweise weil er dem Steuerrechner 10 von einer übergeordneten oder vorgeordneten Steuereinrichtung bekannt gegeben wird.According to FIG. 2 is determined by the control computer 10 in a step S1 at the latest when entering the considered Walzgutpunktes 13 in the finishing train 1, an initial value T1. The determined initial value T1 is characteristic of the energy content of the considered rolling stock point 13. In particular, it may be the temperature or the enthalpy of the considered Walzgutpunktes 13. For example, the actual temperature of the relevant rolling stock point 13 can be detected by measurement on one of the finishing mill 1 upstream temperature measuring station 14 and used directly as the initial value T1. It is also possible to additionally determine or presuppose the phase state of the considered rolling stock point 13 and thereby determine the enthalpy. For example, in the case of steel at a (typical) detected temperature of about 1100 ° C can be readily assumed that the rolling stock 4 is completely in the "austenite" phase. It is also possible that the initial value is otherwise known, for example because it is disclosed to the control computer 10 by a higher-level or upstream control device.

Im weiteren Verlauf kann alternativ die Temperatur oder die Enthalpie als den Energieinhalt beschreibende Größe herangezogen werden. Beide Größen können ggf. durch Phasenanteile des entsprechenden Walzgutpunktes 13 ergänzt sein. Die Verwendung der Temperatur hat den Vorteil, dass sie als solches leicht erfassbar ist. Die Enthalpie hat den Vorteil, dass sie eine Energie erhaltende Größe ist und daher auch die latente Energie der Phasenumwandlungen mit erfasst. Es liegt im Belieben des Fachmanns, welche der Größen er verwendet. Hierauf und auch auf die Berücksichtigung einer etwaigen Phasenumwandlung im Rahmen der Temperaturermittlung wird nachfolgend nicht näher eingegangen, da diese Vorgehensweisen und Problematiken nicht den Kern der vorliegenden Erfindung betreffen. Die entsprechenden Vorgehensweisen und Problematiken sind vielmehr dem Fachmann geläufig und bekannt.In the further course, alternatively, the temperature or the enthalpy can be used as the quantity describing the energy content. Both sizes can be divided by phase proportions be supplemented of the corresponding Walzgutpunktes 13. The use of the temperature has the advantage that it is easily detectable as such. The enthalpy has the advantage that it is an energy-conserving quantity and therefore also detects the latent energy of the phase transformations. It is at the discretion of the skilled person which of the sizes he uses. This and also the consideration of a possible phase transformation in the context of temperature determination will not be discussed in more detail below, since these procedures and problems do not concern the core of the present invention. The corresponding procedures and problems are familiar and familiar to the person skilled in the art.

Der Steuerrechner 10 implementiert aufgrund der Ausführung des Computerprogramms 11 ein Modell 15 für die Warmbandstraße. Das Modell 15 umfasst mathematisch-physikalische Gleichungen, anhand derer bei gegebenem Anfangswert T1 in Verbindung mit Energieinhaltbeeinflussungen δE nach und nach ein sich jeweils ergebender neuer Energieinhalt bzw. ein den jeweiligen Energieinhalt charakterisierender Erwartungswert T2 ermittelt werden kann. Beispielsweise kann das Modell 15 eine Wärmeleitungsgleichung und eine Phasenumwandlungsgleichung umfasst. Die Wärmeleitungsgleichung kann beispielsweise die aus der DE 101 29 565 A1 bekannte Wärmeleitungsgleichung sein, die Phasenumwandlungsgleichung gemäß der Lehre der EP 1 711 868 B1 implementiert werden. Der Steuerrechner 10 führt den ermittelten Anfangswert T1 in einem Schritt S2 dem Modell 15 zu.The control computer 10 implements a model 15 for the hot strip mill due to the execution of the computer program 11. The model 15 comprises mathematical-physical equations on the basis of which a given new energy content or an expected value T2 characterizing the respective energy content can be ascertained gradually given a given initial value T1 in conjunction with energy content influences δE. For example, the model 15 may include a heat equation and a phase transformation equation. The heat equation can, for example, from the DE 101 29 565 A1 be known heat conduction equation, the phase transformation equation according to the teaching of EP 1 711 868 B1 be implemented. The control computer 10 supplies the determined initial value T1 to the model 15 in a step S2.

Der betrachtete Walzgutpunkt 13 wird vom Steuerrechner 10 weiterhin in einem Schritt S3 beim Durchlaufen der Fertigstraße 1 und der Kühlstrecke 2 wegverfolgt. Beispielsweise kann der Steuerrechner 10 von den Walzgerüsten 3 deren Walzendrehzahlen entgegennehmen und aus den Walzendrehzahlen in Verbindung mit den (bekannten) Walzendurchmessern und der - zumindest im Wesentlichen - bekannten Vor- und Nacheilung die jeweils aktuelle Geschwindigkeit des betrachteten Walzgutpunktes 13 ermitteln und so die jeweilige Position des betrachteten Walzgutpunktes 13 von Zeittakt zu Zeittakt fortschreiben. Auch die entsprechende Wegverfolgung führt der Steuerrechner 10 dem Modell 15 zu.The considered rolling stock point 13 is further followed by the control computer 10 in a step S3 when passing through the finishing train 1 and the cooling section 2. For example, the control computer 10 can receive the rolling speeds from the roll stands 3 and determine the respective actual speed of the considered rolling stock point 13 from the roll speeds in conjunction with the (known) roll diameters and the - at least substantially - known lead and lag and thus the respective position of the considered Walzgutpunktes 13 from time to time to update clock. The corresponding path tracking leads the control computer 10 to the model 15.

Der betrachtete Walzgutpunkt 13 wird in der Fertigstraße 1 und der Kühlstrecke 2 Energieinhaltbeeinflussungen δE unterworfen. Beispielsweise erfolgt durch das - in der Regel vom Steuerrechner 10 gesteuerte - Walzen in den Walzgerüsten 3 der Fertigstraße 1 ein Energieeintrag. Auch erfolgt - in der Regel ebenfalls vom Steuerrechner 10 gesteuert - durch die Zwischengerüstkühleinrichtungen 5 der Fertigstraße 1 und die Kühleinrichtungen 8 der Kühlstrecke 2 ein Energieentzug. Weiterhin erfolgt auch ohne "aktive" Temperaturbeeinflussung ein Abstrahlen von Wärme in die Umgebung.The considered Walzgutpunkt 13 is subjected in the finishing train 1 and the cooling section 2 Energieinhaltbeeinflussungen δE. For example, by the - usually controlled by the control computer 10 - rollers in the rolling stands 3 of the finishing train 1, an energy input. Also takes place - usually also controlled by the control computer 10 - by the intermediate stand cooling devices 5 of the finishing train 1 and the cooling means 8 of the cooling section 2, an energy withdrawal. Furthermore, even without "active" temperature influencing a radiation of heat into the environment.

Die Energiebeeinflussungen δE werden vom Steuerrechner 10 in einem Schritt S4 ebenfalls dem Modell 15 zugeführt. Aufgrund der Wegverfolgung des betrachteten Walzgutpunktes 13 ist dem Steuerrechner 10 bekannt, ob und ggf. welches Walzgerüst 3 oder ob und ggf. welche Zwischengerüstkühleinrichtung 5 und ob und ggf. welche Kühleinrichtung 8 der Kühlstrecke 2 gerade auf den betrachteten Walzgutpunkt 13 wirkt. Der Steuerrechner 10 ermittelt daher mittels des Modells 15 in einem Schritt S5 kontinuierlich in Echtzeit den jeweils aktuellen Energieinhalt des betrachteten Walzgutpunktes 13 bzw. den hierfür charakteristischen Erwartungswert T2. Der Steuerrechner 10 führt den Schritt S5 während des Durchlaufs des betrachteten Walzgutpunktes 13 durch die Warmbandstraße aus. Der Steuerrechner 10 aktualisiert also kontinuierlich den jeweiligen Erwartungswert T2 anhand der momentan gültigen Energieinhaltbeeinflussung δE und dem unmittelbar zuvor gültigen Erwartungswert T2. Welche Energieinhaltsbeeinflussung δE heranzuziehen ist, ermittelt der Steuerrechner 10 anhand der Wegverfolgung. Aufgrund dieser Vorgehensweise kann der Steuerrechner 10, ausgehend vom Anfangswert T1, den Erwartungswert T2 Schritt für Schritt aktualisieren, so dass während des Durchlaufs des betreffenden Walzgutpunktes 13 durch die Fertigstraße 1 und die Kühlstrecke 2 zu jedem Zeitpunkt der erwartete Energieinhalt des betreffenden Walzgutpunktes 13 zur Verfügung steht.The energy influences δE are also supplied to the model 15 by the control computer 10 in a step S4. Due to the tracking of the considered Walzgutpunktes 13 the control computer 10 is known whether and possibly which rolling mill 3 or if and possibly which interstand cooling device 5 and whether and possibly which cooling device 8 of the cooling section 2 just acts on the considered Walzgutpunkt 13. The control computer 10 therefore determines by means of the model 15 in a step S5 continuously in real time the respective current energy content of the considered Walzgutpunktes 13 or the characteristic value T2 for this characteristic. The control computer 10 carries out the step S5 during the passage of the considered Walzgutpunktes 13 through the hot strip mill. The control computer 10 thus continuously updates the respective expected value T2 on the basis of the currently valid energy content influencing δE and the immediately previously valid expected value T2. Which energy content influencing δE is to be used is determined by the control computer 10 on the basis of the tracking. Based on this approach, the control computer 10, starting from the initial value T1, the expected value T2 update step by step, so that during the passage of the respective Walzgutpunktes 13 through the finishing line 1 and the cooling section 2 is at any time the expected energy content of the respective Walzgutpunktes 13 available.

Die genaue Vorgehensweise zur aktuellen Ermittlung des erwarteten Energieinhalts ist Fachleuten als solche bekannt. Bezüglich der Detailausgestaltung wird auf die bereits genannte DE 101 56 008 A1 verwiesen.The exact procedure for the current determination of the expected energy content is known to those skilled in the art. Regarding the detail design is on the already mentioned DE 101 56 008 A1 directed.

In einem Schritt S6 prüft der Steuerrechner 10, ob der betrachtete Walzgutpunkt 13 einen vorbestimmten Ort P erreicht hat. Der vorbestimmte Ort P liegt in Laufrichtung x gesehen zwischen dem ersten Walzgerüst 3 und der ersten Kühleinrichtung 8 der Kühlstrecke 2. Vorzugsweise liegt er entsprechend der Darstellung von FIG 1 vor der letzten Zwischengerüstkühleinrichtung 5 der Fertigstraße 1. Aufgrund des Umstands, dass die Zwischengerüstkühleinrichtungen 5 zwischen je zwei Walzgerüsten 3 angeordnet sind und der Temperaturmessplatz 7 hinter dem letzten Walzgerüst 3 der Fertigstraße 1 angeordnet ist, liegt der vorbestimmte Ort P bei der Ausgestaltung von FIG 1 (auch) vor dem letzten Walzgerüst 3 der Fertigstraße 1 und vor dem Temperaturmessplatz 7.In a step S6, the control computer 10 checks whether the considered rolling stock point 13 has reached a predetermined location P. The predetermined location P is seen in the running direction x between the first roll stand 3 and the first cooling device 8 of the cooling section 2. Preferably, it is according to the illustration of FIG. 1 Due to the fact that the intermediate stand cooling devices 5 are arranged between two rolling stands 3 and the temperature measuring station 7 is arranged behind the last rolling stand 3 of the finishing train 1, the predetermined location P is in the embodiment of FIG. 1 (Also) before the last mill stand 3 of the finishing train 1 and before the temperature measuring 7th

Beispielsweise können zwischen dem vorbestimmten Ort P und dem Temperaturmessplatz 7 eines, zwei oder drei Walzgerüste 3 angeordnet sein. Diese Zahl kann ggf. von flachem Walzgut 4 zu flachem Walzgut 4 - nicht aber von betrachtetem Walzgutpunkt 13 zu betrachtetem Walzgutpunkt 13 desselben flachen Walzgutes 4 - variieren, da der vorbestimmte Ort P ein rein softwaretechnisch festgelegter Ort ist. Er kann beispielsweise alternativ durch das Computerprogramm 11 fest vorgegeben sein oder dem Steuerrechner 10 von außen vorgegeben werden oder vom Steuerrechner 10 aufgrund anderer Umstände selbst bestimmt werden.For example, between the predetermined location P and the temperature measuring station 7, one, two or three rolling stands 3 can be arranged. This number can possibly vary from flat rolling stock 4 to flat rolling stock 4 - but not viewed Walzgutpunkt 13 to considered Walzgutpunkt 13 of the same flat rolling 4 - since the predetermined location P is a purely software technically fixed location. It may, for example, alternatively be fixed by the computer program 11 or specified to the control computer 10 from outside or determined by the control computer 10 on the basis of other circumstances.

Wenn der betrachtete Walzgutpunkt 13 den vorbestimmten Ort P erreicht hat (und nur dann, also nicht auch dann, wenn der betrachtete Walzgutpunkt 13 über den vorbestimmten Ort P hinaus transportiert wird), geht der Steuerrechner 10 zu einem Schritt S7 über. Im Schritt S7 ermittelt der Steuerrechner 10 für den betrachteten Walzgutpunkt 13 einen Sollenergieinhaltsverlauf E*. Der Sollenergieinhaltsverlauf E* erstreckt sich von dem vorbestimmten Ort P bis zum Auslaufen des betrachteten Walzgutpunktes 13 aus der Kühlstrecke 2. Er kann beispielsweise als örtlicher Verlauf (bezogen auf den Ort des betrachteten Walzgutpunktes 13 in der Warmbandstraße) oder als zeitlicher Verlauf definiert sein. Der Steuerrechner 10 ermittelt den Sollenergieinhaltsverlauf E* im Schritt S7 unter Verwendung desjenigen Erwartungswertes T2 für den Energieinhalt, der dem betrachteten Walzgutpunkt 13 aktuell, also am vorbestimmten Ort P, zugeordnet ist. Der Steuerrechner 10 ermittelt den Sollenergieinhaltsverlauf E* somit unter Verwendung des Energieinhalts, der für den betrachteten Walzgutpunkt 13 an dem vorbestimmten Ort P erwartet wird.If the considered Walzgutpunkt 13 has reached the predetermined location P (and only then, not even when the considered Walzgutpunkt 13 is transported beyond the predetermined location P out), the control computer 10 goes to a Step S7 via. In step S7, the control computer 10 determines a desired energy content course E * for the considered rolling stock point 13. The desired energy content course E * extends from the predetermined location P to the departure of the considered rolling stock point 13 from the cooling section 2. It can be defined, for example, as a local course (relative to the location of the considered rolling stock point 13 in the hot strip mill) or as a time profile. The control computer 10 determines the desired energy content course E * in step S7 using the expected value T2 for the energy content which is currently associated with the considered rolling stock point 13, ie at the predetermined location P. The control computer 10 thus determines the desired energy content course E * using the energy content that is expected for the considered rolling stock point 13 at the predetermined location P.

Vom Schritt S7 geht der Steuerrechner 10 zu einem Schritt S8 über. Im Schritt S8 ermittelt der Steuerrechner 10 die Energiebeeinflussungen δE, die erforderlich sind, um den Energieinhalt des betrachteten Walzgutpunktes 13 entsprechend dem ermittelten Sollenergieinhaltsverlauf E* einzustellen. Der Steuerrechner 10 ermittelt also im Schritt S8 in Abhängigkeit von dem ermittelten Sollenergieinhaltsverlauf E* die Energiebeeinflussungen δE, denen der betrachtete Walzgutpunkt 13 ab dem vorbestimmten Ort P bis zum Auslaufen aus der Kühlstrecke 2 unterworfen wird.From step S7, the control computer 10 proceeds to a step S8. In step S8, the control computer 10 determines the energy influences δE which are required in order to set the energy content of the considered rolling stock point 13 in accordance with the determined target energy content profile E *. The control computer 10 thus determines in step S8 as a function of the determined target energy content course E * the energy influences δE, which the considered Walzgutpunkt 13 is subjected from the predetermined location P until it leaves the cooling section 2.

Gemäß FIG 2 werden die Energieinhaltbeeinflussungen δE für den betrachteten Walzgutpunkt 13 sofort ermittelt, also unmittelbar nach dem Ermitteln des Sollenergieinhaltsverlaufs E*. Alternativ kann, ausgehend vom Schritt S6, im NEIN-Zweig nur der Schritt S7 übersprungen werden. In diesem Fall kann der Schritt S8 dahingehend modifiziert sein, dass jeweils nur die nächste Energieinhaltbeeinflussung δE (oder die nächste Gruppe derartiger Beeinflussungen δE) für den betrachteten Walzgutpunkt 13 ermittelt wird. In diesem Fall können beispielsweise nach dem Anwenden der entsprechenden Beeinflussungen δE auf den betrachteten Walzgutpunkt 13 spätere Energieinhaltbeeinflussungen δE für den betrachteten Walzgutpunkt 13 nachkorrigiert werden.According to FIG. 2 the energy content influences δE for the considered rolling stock point 13 are determined immediately, ie immediately after the determination of the desired energy content profile E *. Alternatively, starting from step S6, only the step S7 can be skipped in the NO branch. In this case, step S8 may be modified such that in each case only the next energy content influencing ΔE (or the next group of such influences ΔE) is determined for the considered rolling stock point 13. In this case, for example, after applying the corresponding influences δE on the considered Walzgutpunkt 13 later energy content influences δE for the considered Walzgutpunkt 13 nachkorrigiert.

In einem Schritt S9 steuert der Steuerrechner 10 - je nach Ort des betrachteten Walzgutpunktes 13 in der Warmbandstraße - die entsprechende Zwischengerüstkühleinrichtung 5, die entsprechende Kühleinrichtung 8 der Kühlstrecke 2 oder das entsprechende Walzgerüst 3 an.In a step S9, the control computer 10 - depending on the location of the considered Walzgutpunktes 13 in the hot strip mill - the corresponding interstand cooling device 5, the corresponding cooling device 8 of the cooling section 2 or the corresponding rolling stand 3 at.

Der Schritt S9 wird vom Steuerrechner 10 stets ausgeführt, also sowohl in dem Fall, dass der betrachtete Walzgutpunkt 13 sich vor dem vorbestimmten Ort P befindet, als auch in dem Fall, dass der betrachtete Walzgutpunkt 13 sich hinter dem vorbestimmten Ort P befindet. Wenn der betrachtete Walzgutpunkt 13 sich vor dem vorbestimmten Ort P befindet, ist die entsprechende Energiebeeinflussung δE anderweitig bestimmt worden, beispielsweise beim Einlaufen des betrachteten Walzgutpunktes 13 in die Fertigstraße 2 anhand des Anfangswertes T1 für den Energieinhalt. Wenn der betrachtete Walzgutpunkt 13 sich hingegen hinter dem vorbestimmten Ort P befindet, wird die im Schritt S8 ermittelte Energiebeeinflussung δE herangezogen. Die Zwischengerüstkühleinrichtungen 5, die bei der Ausgestaltung von FIG 1 dem vorbestimmten Ort P in Laufrichtung x gesehen nachgeordnet sind, und die Kühleinrichtungen 8 der Kühlstrecke 2 werden vom Steuerrechner 10 also entsprechend den im Schritt S8 ermittelten Energieinhaltbeeinflussungen δE angesteuert. Im allgemeinen Fall, wenn also der vorbestimmte Ort P in Laufrichtung x gesehen unmittelbar hinter der Fertigstraße 1 oder zwischen der letzten Zwischengerüstkühleinrichtung 5 und dem letzten Walzgerüst 3 der Fertigstraße 1 liegt, werden selbstverständlich nur die Kühleinrichtungen 8 der Kühlstrecke 2 entsprechend den im Schritt S8 ermittelten Energieinhaltbeeinflussungen δE angesteuert.The step S9 is always executed by the control computer 10, that is, both in the case that the considered Walzgutpunkt 13 is located in front of the predetermined location P, as well as in the case that the considered Walzgutpunkt 13 is located behind the predetermined location P. If the considered Walzgutpunkt 13 is located in front of the predetermined location P, the corresponding energy influence δE has been determined otherwise, for example, when entering the considered Walzgutpunktes 13 in the finishing train 2 from the initial value T1 for the energy content. If, on the other hand, the considered rolling stock point 13 is behind the predetermined location P, the energy influencing δE determined in step S8 is used. The interstand cooling devices 5, which in the embodiment of FIG. 1 are arranged downstream of the predetermined location P seen in the direction x, and the cooling means 8 of the cooling section 2 are thus controlled by the control computer 10 according to the determined in step S8 Energieinhaltbeeinflussungen δE. In the general case, therefore, if the predetermined location P seen in the direction x is immediately behind the finishing train 1 or between the last interstand cooling device 5 and the last mill stand 3 of the finishing train 1, of course, only the cooling means 8 of the cooling section 2 corresponding to those determined in step S8 Energy content influences δE activated.

Es ist möglich, dass die vor dem vorbestimmten Ort P liegenden Zwischengerüstkühleinrichtungen 5 - sofern sie vorhanden sind - angesteuert werden. In diesem Fall muss der Einfluss der entsprechenden Zwischengerüstkühleinrichtungen 5 auf den Energieinhalt der Walzgutpunkte 13 im Rahmen der Modellierung berücksichtigt werden. Alternativ sind diese Zwischengerüstkühleinrichtungen 5 inaktiv. Die vor dem vorbestimmten Ort P angeordneten Zwischengerüstkühleinrichtungen 5 kühlen in diesem Fall das flache Walzgut 4 nicht.It is possible that the interstand cooling devices 5 situated in front of the predetermined location P - if present - are activated. In this case, the influence of the respective interstand cooling means 5 on the Energy content of Walzgutpunkte 13 are taken into account in the modeling. Alternatively, these interstand cooling devices 5 are inactive. The intermediate stand cooling devices 5 arranged in front of the predetermined location P do not cool the flat rolling stock 4 in this case.

In einem Schritt S10 prüft der Steuerrechner 10, ob der betrachtete Walzgutpunkt 13 aus der Kühlstrecke 2 ausgelaufen ist. Falls dies der Fall ist, ist die erfindungsgemäße Vorgehensweise für den betrachteten Walzgutpunkt 13 beendet.In a step S10, the control computer 10 checks whether the considered rolling stock point 13 has run out of the cooling section 2. If this is the case, the procedure according to the invention for the considered rolling stock point 13 is completed.

Nachfolgend werden in Verbindung mit den weiteren FIG bevorzugte Ausgestaltungen des erfindungsgemäßen Steuerverfahrens näher erläutert. Die vorteilhaften Ausgestaltungen werden nachfolgend einzeln erläutert. Sie sind ohne Weiteres und nach Belieben miteinander kombinierbar.In the following, preferred embodiments of the control method according to the invention will be explained in more detail in connection with the further FIG. The advantageous embodiments are explained individually below. They are readily combinable with one another at will.

Gemäß FIG 3 wird das flache Walzgut 4 in demjenigen Walzgerüst 3, das dem vorbestimmten Ort P in Laufrichtung x gesehen unmittelbar vorgeordnet ist, auf eine Endwalzdicke d gewalzt. Die Endwalzdicke d kann beispielsweise zwischen 5 mm und 30 mm liegen.According to FIG. 3 the flat rolling stock 4 is rolled to a final rolling thickness d in the rolling mill 3 which is immediately upstream of the predetermined location P in the running direction x. The final roll thickness d can be, for example, between 5 mm and 30 mm.

Hinter dem vorbestimmten Ort P wird das flache Walzgut 4 nicht mehr gewalzt. Falls dem vorbestimmten Ort P Walzgerüste 3 nachgeordnet sind, wird das flache Walzgut 4 dort also nicht mehr gewalzt. Die Endwalzdicke d bleibt vielmehr unverändert erhalten.Behind the predetermined location P, the flat rolling stock 4 is no longer rolled. If the rolling mill 3 are arranged downstream of the predetermined location P, the flat rolling stock 4 is therefore no longer rolled there. The final roll thickness d remains rather unchanged.

Die nachgeordneten Walzgerüste 3 können aufgefahren sein, so dass ihre Walzen 16 das flache Walzgut 4 nicht kontaktieren. Dies ist in FIG 3 für das dem vorbestimmten Ort P unmittelbar nachgeordnete Walzgerüst 3 so dargestellt. Alternativ ist es möglich, dass die Walzen 16 der nachgeordneten Walzgerüste 3 an das flache Walzgut 4 angestellt sind, es jedoch nicht walzen, sondern es nur umformungsfrei treiben. Dies ist in FIG 3 für das letzte Walzgerüst 3 der Fertigstraße 1 so dargestellt.The downstream rolling stands 3 can be ascended so that their rollers 16 do not contact the flat rolling stock 4. This is in FIG. 3 for the predetermined location P immediately downstream rolling stand 3 so shown. Alternatively, it is possible that the rollers 16 of the downstream rolling stands 3 are employed on the flat rolling stock 4, but do not roll it, but only drive it without deformation. This is in FIG. 3 for the last rolling mill 3 of the finishing train 1 shown.

Wie bereits in Verbindung mit FIG 1 erwähnt und in FIG 4 nochmals dargestellt, kann zwischen der Fertigstraße 1 und der Kühlstrecke 2 ein Temperaturmessplatz 7 angeordnet sein, mittels dessen die tatsächliche Oberflächentemperatur TO der Walzgutpunkte 13 am Ort des Temperaturmessplatzes 7 erfassbar ist. Falls der Temperaturmessplatz 7 vorhanden ist, sind verschiedene Vorgehensweisen möglich.As already in connection with FIG. 1 mentioned and in FIG. 4 shown again, a temperature measuring station 7 can be arranged between the finishing train 1 and the cooling section 2, by means of which the actual surface temperature TO of the rolling stock points 13 at the location of the temperature measuring station 7 can be detected. If the temperature measuring station 7 is present, various approaches are possible.

Zum einen ist es möglich, dass die entsprechenden Oberflächentemperaturen TO gar nicht erfasst werden. Dies ist in FIG 4 durch die mit dem Bezugszeichen 17 versehene gestrichelte Linie angedeutet. In diesem Fall ist der Temperaturmessplatz 7 zwar vorhanden, wird aber nicht aktiv betrieben.On the one hand, it is possible that the corresponding surface temperatures TO are not recorded at all. This is in FIG. 4 indicated by the dashed line provided with the reference numeral 17. In this case, although the temperature measuring station 7 is present, it is not actively operated.

Zum anderen ist es möglich, die entsprechenden Oberflächentemperaturen TO zwar zu erfassen und dem Steuerrechner 10 zuzuführen. Dies ist in FIG 4 durch die mit dem Bezugszeichen 18 versehene durchgezogene Linie angedeutet. In diesem Fall wird die für einen bestimmten Walzgutpunkt 13 erfasste Oberflächentemperatur TO zwar erfasst, aber nicht zur Bestimmung des Sollenergieinhaltsverlaufs E* des betrachteten Walzgutpunkts 13 herangezogen. Dies ist in FIG 4 dadurch angedeutet, dass die Linie 18 innerhalb des Steuerrechners 10 mit einem Querstrich abgeschlossen ist. Die erfasste Oberflächentemperatur TO kann jedoch unter Umständen für andere Zwecke herangezogen werden, beispielsweise für eine Adaptierung des Modells 15.On the other hand, it is possible to detect the corresponding surface temperatures TO and to feed them to the control computer 10. This is in FIG. 4 indicated by the solid line provided with the reference numeral 18. In this case, the surface temperature TO detected for a certain rolling stock point 13 is indeed detected, but not used to determine the desired energy content profile E * of the rolling stock point 13 under consideration. This is in FIG. 4 indicated that the line 18 is completed within the control computer 10 with a bar. However, the detected surface temperature TO may possibly be used for other purposes, for example for adaptation of the model 15.

FIG 5 zeigt mögliche Ergänzungen der Schritte S7 und S8 von FIG 2. FIG. 5 shows possible additions to the steps S7 and S8 of FIG. 2 ,

Gemäß FIG 5 ist dem Schritt S8 ein Schritt S21 nachgeordnet. Im Schritt S21 prüft der Steuerrechner 10, ob die dem vorbestimmten Ort P unmittelbar nachgeordnete Zwischengerüstkühleinrichtung 5 in Bezug auf den betrachteten Walzgutpunkt 13 mit mindestens 80 % ihrer maximal möglichen Energieinhaltbeeinflussung und/oder mit maximal 90 % oder maximal 95 % ihrer maximal möglichen Energieinhaltbeeinflussung betrieben wird. Wenn dies nicht der Fall ist, geht der Steuerrechner 10 bei der Ausgestaltung von FIG 5 zu einem Schritt S22 über. Im Schritt S22 variiert der Steuerrechner 10 den Sollenergieinhaltsverlauf E* entsprechend.According to FIG. 5 Step S8 is followed by a step S21. In step S21, the control computer 10 checks whether the intermediate structure cooling device 5 immediately downstream of the predetermined location P has at least 80% of its maximum possible influence on energy content with respect to the considered rolling stock 13 and / or with a maximum of 90% or at most 95% of its maximum possible influence of energy content is operated. If this is not the case, the control computer 10 goes in the embodiment of FIG. 5 to a step S22. In step S22, the control computer 10 varies the target energy content course E * accordingly.

Falls dem vorbestimmten Ort P weitere Zwischengerüstkühleinrichtungen 8 nachgeordnet sind, sind analoge Vorgehensweisen selbstverständlich auch für die weitere Zwischengerüstkühleinrichtungen 5 möglich.If further intermediate stand cooling devices 8 are arranged downstream of the predetermined location P, analogous procedures are, of course, also possible for the further intermediate stand cooling devices 5.

Alternativ oder zusätzlich zu den Schritten S21 und S22 können Schritte S26 und S27 vorhanden sein. Im Schritt S26 bildet der Steuerrechner 10 die Differenz zwischen einem gewünschten Endwalzenergieinhalt T2* und dem Energieinhalt gemäß dem Erwartungswert T2, der für den betrachteten Walzgutpunkt 13 am vorbestimmten Ort P ermittelt wird. Im Schritt S27 zieht der Steuerrechner 10 diese Differenz dazu heran, um Steuergrößen für Walzgerüste 3 und/oder Zwischengerüstkühleinrichtungen 5 zu ermitteln, die dem vorbestimmten Ort P vorgeordnet sind. Beispielsweise können - entsprechend einer totzeitbehafteten Regelung - die Energieinhaltbeeinflussungen δE für dem vorbestimmten Ort P vorgeordnete Zwischengerüstkühleinrichtungen 5 nachgeregelt werden oder kann ein Massenfluss, der selbstverständlich auf die gesamte Warmbandstraße wirkt, nachgeführt werden.Alternatively or in addition to the steps S21 and S22, steps S26 and S27 may be present. In step S26, the control computer 10 forms the difference between a desired Endwalzenergieinhalt T2 * and the energy content according to the expected value T2, which is determined for the considered Walzgutpunkt 13 at the predetermined location P. In step S27, the control computer 10 uses this difference to determine control variables for rolling stands 3 and / or interstand cooling devices 5, which are arranged upstream of the predetermined location P. For example, according to a control subject to deadtime, the energy content influences δE for the predetermined location P upstream intermediate structure cooling devices 5 can be readjusted or a mass flow, which of course acts on the entire hot strip line, can be tracked.

Die vorliegende Erfindung weist viele Vorteile auf. Insbesondere kann durch die erfindungsgemäße Vorgehensweise in einer Warmbandstraße sowohl für Grobblech als auch für Band eine Erzeugung von Rohrgüten erfolgen.The present invention has many advantages. In particular, can be done by the inventive procedure in a hot strip mill for both plate and strip production of pipe grades.

Obwohl die Erfindung im Detail durch das bevorzugte Ausführungsbeispiel näher illustriert und beschrieben wurde, so ist die Erfindung nicht durch die offenbarten Beispiele eingeschränkt und andere Variationen können vom Fachmann hieraus abgeleitet werden, ohne den Schutzumfang der Erfindung zu verlassen.Although the invention has been further illustrated and described in detail by the preferred embodiment, the invention is not limited by the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.

Claims (15)

  1. Control method for a hot strip rolling line,
    - wherein the hot strip rolling line comprises a finishing train (1) for rolling flat rolling stock (4) made of metal,
    - wherein the finishing train (1) has a number of roll stands (3), through which the flat rolling stock (4) passes in succession in a direction of passage (x),
    - wherein the hot strip rolling line comprises a cooling section (2) disposed downstream of the finishing train (1),
    - wherein an initial value (T1) characterizing the energy content of the respective rolling stock point (13) is determined for rolling stock points (13) of the flat rolling stock (4) at the latest when the respective rolling stock point (13) enters the finishing train (1),
    - wherein the initial values (T1) are fed to a model (15) for the hot strip rolling line,
    - wherein the rolling stock points (13) are tracked as they pass through the finishing train (1) and the cooling section (2),
    - wherein the trackings and energy content influences (δE), to which the rolling stock points (13) are subject in the finishing train (1) and the cooling section (2), are also fed to the model (15),
    - wherein the control computer (10) uses the model (15) to determine expected values (T2) for the rolling stock points (13) characterizing the current energy content of the rolling stock points (13) passing through the hot strip rolling line continuously and in real time based on the initial values (T1), the trackings and the energy content influences (δE) as the rolling stock points (13) pass through the hot strip rolling line, characterised in that
    - a target energy content progression (E*) from a predetermined location (P) until the respective rolling stock point (13) passes out of the cooling section (2) is determined for the rolling stock points (13) using the energy content expected for them at the predetermined location (P),
    - the predetermined location (P) is located between the first roll stand (3) and the first cooling facility (8) of the cooling section (2) in the direction of passage (x),
    - the energy content influences (δE), to which the rolling stock points (13) are subject from the predetermined location (P) until the respective rolling stock point (13) passes out of the cooling section (2), are determined as a function of the determined target energy content progression (E*) and
    - the cooling facilities (5, 8) disposed downstream of the predetermined location (P) in the direction of passage (x) are activated according to the determined energy content influences (δE).
  2. Control method according to claim 1,
    characterised in that
    the flat rolling stock (4) is rolled to a final rolling thickness (d) in the roll stand (3) disposed directly upstream of the predetermined location (P) in the direction of passage (x) and the flat rolling stock (4) is no longer rolled downstream of the predetermined location (P) in the direction of passage (x).
  3. Control method according to claim 2,
    characterised in that
    at least one roll stand (3) is disposed downstream of the predetermined location (P) in the direction of passage (x) and the roll stands (3) disposed downstream of the predetermined location (P) in the direction of passage (x) are raised so that their rollers (16) do not come into contact with the flat rolling stock (4) or rollers (16) of the roll stands (3) disposed downstream of the predetermined location (P) in the direction of passage (x) are lined up with the flat rolling stock (4) and drive the flat rolling stock (4) without shaping it.
  4. Control method according to claim 1, 2 or 3,
    characterised in that
    inter-stand cooling facilities (5) are disposed upstream of the predetermined location (P) in the direction of passage (x) and these inter-stand cooling facilities (5) are alternatively active or inactive.
  5. Control method according to one of the preceding claims,
    characterised in that
    at least one inter-stand cooling facility (5) is disposed between the predetermined location (P) and the last roll stand (3) of the finishing train (1) in the direction of passage (x) and the at least one inter-stand cooling facility (5) is also activated according to the determined energy content influences (δE).
  6. Control method according to claim 5,
    characterised in that
    the number of roll stands (3) disposed downstream of the predetermined location (P) in the direction of passage (x) is between 1 and 3.
  7. Control method according to claim 5 or 6,
    characterised in that
    the target energy content progression (E*) from the predetermined location (P) until the respective rolling stock point (13) passes out of the cooling section (2) is determined in such a manner that at least the inter-stand cooling facility (5) disposed directly downstream of the predetermined location (P) is operated with at least 80 % and/or with maximum 90 % or 95 % of its maximum possible energy content influence.
  8. Control method according to claim 5, 6 or 7,
    characterised in that
    the final rolling thickness (d) is between 5 mm and 30 mm.
  9. Control method according to one of the preceding claims,
    characterised in that
    a temperature measuring point (7) is disposed between the finishing train (1) and the cooling section (2), being used to measure the actual surface temperature (TO) of the rolling stock points (13) at the location of the temperature measuring point (7), and either the actual surface temperature (TO) of the rolling stock points (13) at the location of the temperature measuring point (7) is not measured or the actual surface temperature (TO) of the rolling stock points (13) at the location of the temperature measuring point (7) is measured but is not used to determine the target energy content progression (E*).
  10. Control method according to one of the preceding claims,
    characterised in that
    the difference between a desired final rolling energy content (T2*) and the energy content characterised by the expected value (T2) determined for the predetermined location (P) is used to determine control variables for roll stands (3) disposed upstream of the predetermined location (P) and/or for inter-stand cooling facilities (5) disposed upstream of the predetermined location (P).
  11. Control method according to one of the preceding claims,
    characterised in that
    the flat rolling stock (4) is a strip.
  12. Control method according to one of the preceding claims,
    characterised in that
    the energy content of the rolling stock points (13) is determined by their temperature or by their enthalpy.
  13. Computer program, which comprises machine code (12), which can be processed directly by a control computer (10) for a hot strip rolling line for rolling flat rolling stock (4) made of metal and its processing by the control computer (10) causes the control computer (10) to operate the hot strip rolling line according to a control method with all the steps of a control method according to one of the preceding claims.
  14. Control computer for a hot strip rolling line for rolling flat rolling stock (4) made of metal,
    characterised in that
    the control computer is configured in such a manner that it operates the hot strip rolling line according to a control method with all the steps of a control method according to one of claims 1 to 12.
  15. Hot strip rolling line for rolling flat rolling stock (4) made of metal,
    - wherein the hot strip rolling line comprises a finishing train (1) for rolling the flat rolling stock (4),
    - wherein the finishing train (1) has a number of roll stands (3), through which the flat rolling stock (4) passes in succession in a direction of passage (x),
    - wherein the hot strip rolling line comprises a cooling section (2) disposed downstream of the finishing train (1),
    characterised in that
    the hot strip rolling line is equipped with a control computer (10) according to claim 14.
EP12727821.6A 2011-06-27 2012-06-06 Method for controlling a hot strip rolling line Active EP2712332B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12727821.6A EP2712332B1 (en) 2011-06-27 2012-06-06 Method for controlling a hot strip rolling line

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP11171512A EP2540404A1 (en) 2011-06-27 2011-06-27 Operating method for a hot strip mill
PCT/EP2012/060738 WO2013000677A1 (en) 2011-06-27 2012-06-06 Method for controlling a hot strip rolling line
EP12727821.6A EP2712332B1 (en) 2011-06-27 2012-06-06 Method for controlling a hot strip rolling line

Publications (2)

Publication Number Publication Date
EP2712332A1 EP2712332A1 (en) 2014-04-02
EP2712332B1 true EP2712332B1 (en) 2015-07-29

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EP12727821.6A Active EP2712332B1 (en) 2011-06-27 2012-06-06 Method for controlling a hot strip rolling line

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US (1) US9815100B2 (en)
EP (2) EP2540404A1 (en)
CN (1) CN103619501B (en)
BR (1) BR112013033435A8 (en)
WO (1) WO2013000677A1 (en)

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Publication number Priority date Publication date Assignee Title
EP2777836A1 (en) * 2013-03-14 2014-09-17 Siemens VAI Metals Technologies GmbH Cooling device with spray bar with elongated outlets
EP2777835A1 (en) * 2013-03-14 2014-09-17 Siemens VAI Metals Technologies GmbH Cooling device with spray bar with ventilation device
DE102013221710A1 (en) 2013-10-25 2015-04-30 Sms Siemag Aktiengesellschaft Aluminum hot strip rolling mill and method for hot rolling an aluminum hot strip
EP2873469A1 (en) * 2013-11-18 2015-05-20 Siemens Aktiengesellschaft Operating method for a cooling section
CN106029244B (en) 2013-12-20 2020-03-20 诺维尔里斯巴西有限公司 Dynamic reducing transition (DSR) to control temperature in tandem rolling mill
EP2898963A1 (en) * 2014-01-28 2015-07-29 Siemens Aktiengesellschaft Cooling section with dual cooling to a particular target value
CN110849928B (en) * 2019-10-17 2022-05-03 浙江工业大学 Ultrasonic rolling processing temperature measurement analysis method
DE102019217966A1 (en) 2019-11-21 2021-05-27 Sms Group Gmbh Setting a run-out temperature of a metal strip running out of a rolling train
DE102019132029A1 (en) * 2019-11-26 2021-05-27 Thyssenkrupp Steel Europe Ag Production of a desired metal workpiece from a flat metal product

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DE19963186B4 (en) * 1999-12-27 2005-04-14 Siemens Ag Method for controlling and / or regulating the cooling section of a hot strip mill for rolling metal strip and associated device
DE10129565C5 (en) * 2001-06-20 2007-12-27 Siemens Ag Cooling method for a hot-rolled rolling stock and corresponding cooling line model
DE10156008A1 (en) 2001-11-15 2003-06-05 Siemens Ag Control method for a finishing train upstream of a cooling section for rolling hot metal strip
ATE348671T1 (en) * 2003-02-25 2007-01-15 Siemens Ag METHOD FOR CONTROLLING THE TEMPERATURE OF A METAL STRIP, PARTICULARLY IN A COOLING SECTION
DE102004005919A1 (en) * 2004-02-06 2005-09-08 Siemens Ag Computer-aided modeling method for the behavior of a steel volume with a volume surface
US7853348B2 (en) * 2004-04-06 2010-12-14 Siemens Aktiengesellschaft Method for producing a metal
KR101285990B1 (en) * 2008-11-19 2013-07-15 도시바 미쓰비시덴키 산교시스템 가부시키가이샤 Controller
EP2301685A1 (en) * 2009-09-23 2011-03-30 Siemens Aktiengesellschaft Control method for a treatment assembly for an elongated milling product

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BR112013033435A2 (en) 2017-01-31
CN103619501B (en) 2016-01-20
EP2712332A1 (en) 2014-04-02
WO2013000677A1 (en) 2013-01-03
US20140230511A1 (en) 2014-08-21
US9815100B2 (en) 2017-11-14
EP2540404A1 (en) 2013-01-02
CN103619501A (en) 2014-03-05
BR112013033435A8 (en) 2018-04-03

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