EP2296834B1 - Method for cooling a hot-rolled strip onto a hot-rolled strip coil, a device for cooling a hot-rolled strip coil, a control and/or regulating device - Google Patents

Method for cooling a hot-rolled strip onto a hot-rolled strip coil, a device for cooling a hot-rolled strip coil, a control and/or regulating device Download PDF

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Publication number
EP2296834B1
EP2296834B1 EP09793894.8A EP09793894A EP2296834B1 EP 2296834 B1 EP2296834 B1 EP 2296834B1 EP 09793894 A EP09793894 A EP 09793894A EP 2296834 B1 EP2296834 B1 EP 2296834B1
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EP
European Patent Office
Prior art keywords
cooling
hot
hot strip
temperature
strip coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP09793894.8A
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German (de)
French (fr)
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EP2296834A1 (en
Inventor
Hans-Joachim Felkl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
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Siemens AG
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Publication date
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Priority to EP09793894.8A priority Critical patent/EP2296834B1/en
Priority to PL09793894T priority patent/PL2296834T3/en
Publication of EP2296834A1 publication Critical patent/EP2296834A1/en
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Publication of EP2296834B1 publication Critical patent/EP2296834B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • 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
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/26—Special arrangements with regard to simultaneous or subsequent treatment of the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0035—Forging or pressing devices as units
    • B21B15/005—Lubricating, cooling or heating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/20—Temperature
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals

Definitions

  • the invention relates to a method for cooling a hot strip coiled into a hot-rolled strip by means of an intermediate storage device that is different from a reel. Furthermore, the invention relates to a device for cooling a hot strip Federal as well as a control and / or regulating device for a device for cooling a hot strip Federal.
  • the hot strip In the production of hot strip by means of a hot rolling line, the hot strip is usually wound on a reel to a hot strip coil at the end of the hot rolling line. In this case, the hot strip has usually already run through a cooling section in which the desired structure of the hot strip and thus its properties have been set. Metals undergoing such processes are, for example, steel, aluminum and copper. However, in hot rolling mills other bands of other metals are processed.
  • cold rolling mills especially tandem mills, come to self-reinforcing vibrations that adversely affect the strip quality of the metal strip to be produced.
  • metal strips of such sensitive metal grades are rolled on a single-stand cold rolling mill.
  • German Offenlegungsschrift DT 24 50 548 A1 discloses a cooling device for rolling stock, in particular strip coils, which are cooled by means of gondolas which are temporarily moved by a cooling liquid trough. This solution is very space-intensive and unsuitable for the requirements of modern metal qualities.
  • the invention has for its object to provide a method and an apparatus with which in a compact manner for compared to the lateral surface of the hot strip collar small lateral surface areas homogeneous band properties of the hot-rolled strip, in particular in the circumferential direction, can be obtained.
  • the part of the object to be assigned to the method is achieved by a method for cooling a hot strip coiled into a hot strip by means of an intermediate storage device, wherein the hot strip is rotated about its axis of symmetry during intermediate storage and stored at least in sections on its lateral surface and by contact of its Jacket surface is cooled with at least one physical element.
  • the radially outwardly facing boundary surface of the hot strip bundle is considered, which is formed by the width of the coiled hot strip of the outermost winding.
  • the symmetry axis of the hot strip collar runs essentially through the center of the hot strip collar perpendicular to the radial extent of the hot strip collar.
  • the physical element has a fixed, demarcated form compared to. its environment, where a variety of elasticities can be realized.
  • the physical element may be formed as a rigid body, wherein the lateral surface is covered with an elastic material at least in sections, in order to store the hot-rolled strip gently and to avoid damage to the surface.
  • the material can be adjusted in its thermal properties according to the desired cooling rate. This makes it possible to suitably adjust the thermo-mechanical properties of the physical element.
  • such a physical element can be designed such that it causes the rotation of the hot strip collar about its axis of symmetry.
  • a physical element is preferably designed such that it covers the lateral surface of the hot-rolled strip in the Essentially contacted on the entire mantle height.
  • the intermediate storage device can be designed, for example, as a storage device for hot strip bundles or as a transport device for hot strip bundles.
  • the hot strip bundles can be brought to certain positions within a rolling mill, on the other hand they are cooled by the inventive method during transport evenly over the circumference, whereby the hot strip has a uniformly high structural quality.
  • the physical element is used simultaneously as a bearing element for the storage of the hot strip collar.
  • the physical element may for example be designed as a movable bearing roller on which the hot-rolled strip is rotated about its axis of symmetry.
  • the physical element in this case is designed such that it can at least partially absorb the weight of the hot-rolled band.
  • the term storage is in the context of this application i. d. R. be understood in such a way that the storage always requires a recording of a weight of the hot strip collar by the bearing element. Bend rolls to a hot strip bundle mounted on a coiler mandrel are e.g. no bearing elements, as these i.d.R. do not absorb the weight of the hot strip collar, but only apply bending forces to form the hot strip collar.
  • an average jacket temperature of the hot strip collar detects a temperature for a segment of the lateral surface, depending on a deviation from the temperature of the jacket segment of the average jacket temperature, a contact time of the jacket segment with the at least one element set such that reduces the deviation. It is thereby achieved that local temperature fluctuations of the lateral surface of the hot strip bundle can be deliberately cooled more strongly or less, in order to achieve the same temperature as possible for all segments of the lateral surface. It is always comprehensible and verifiable which segments of the lateral surface have a particularly high deviation from a mean jacket temperature and therefore require a particularly high or low cooling. In this respect, by adjusting the contact time of the respective sheath segment with the at least one physical element, a heat output of the respective sheath segment can be adjusted to the physical element. This increases the accuracy for achieving homogeneous band properties.
  • a mean contact time of a sheath segment with the at least one element is set by a predefinable rotational speed of the hot-rolled strip, wherein with positive or negative temperature deviation, the contact time is increased or decreased relative to the average contact time.
  • the temperature of the sheath segment is detected contactless.
  • pyrometers and / or ondometers can be used.
  • the average jacket temperature is determined from a multiplicity of temperatures detected for different jacket segments.
  • the mean jacket temperature is therefore always traced back to measured values of the multiplicity of temperatures detected for different jacket segments.
  • the average temperature of the lateral surface is formed from the detected temperatures of the shell segments within the last revolution of the hot strip bundle.
  • the last measured values of a specific jacket segment are always replaced by the new measured value for this jacket segment, whereby a corresponding adaptation of the average jacket temperature to the constant cooling of the hot-rolled collar occurs.
  • a cooling of a shell segment by the at least one element is precalculated by means of a model and set the contact time based on the calculation.
  • a model is based on the heat equation and may also include possible phase transitions for the metal to be cooled.
  • heat radiation and convection for the hot strip can be included.
  • the cooling process can be changed in such a way that, for example, the sum of the deviations of the temperatures of the shell segments from the mean jacket temperature becomes minimal for a predefinable temperature to be achieved.
  • the rotation of the hot strip is then controlled by the model specifications to achieve the desired result.
  • the structure can still be influenced in such a way that it is optimized for a subsequent cold rolling. This may involve not only hardness variations of the metal strip, but also the hardness of the metal strip as such.
  • a band optimized for the requirements of cold rolling can be provided.
  • a cooling capacity of the at least one element is adjusted, preferably controlled and / or regulated.
  • a physical element to be supplied with a cooling medium with which, in addition, the heat dissipation from the shell segment which is in contact with the element can be influenced.
  • a constant mass transfer can take place in order to ensure a corresponding cooling capacity and, for example, to avoid heating of the element to an undesired temperature.
  • the setting of the cooling power is useful, for example, if particularly high deviations of temperatures of individual jacket segments from the average jacket temperature occur.
  • a cooling capacity of the at least one element can be increased to equalize the temperature of this sheath segment as quickly as possible to the average shell segment temperature.
  • the cooling rate of the hot strip bundle can be predetermined. This means that, for example, to fill process gaps in the cold rolling train, for example, hot strip coil is cooled faster but still uniformly, for example, to optimally utilize a cold rolling train.
  • the device-related part of the object is achieved by a control and / or regulating device for a device for cooling a hot-rolled strip, with machine-readable program code, which has control commands, the execution of the program code, the control and / or regulating device for performing a method according to one of Induce claims 1 to 8.
  • a control and / or regulating device for carrying out the method described above a particularly high accuracy when cooling the hot strip bundle can be realized, which is reflected in an improved rolling ability of the hot strip in the cold rolling mill.
  • the device-related part of the object is likewise achieved by a device for cooling a hot-rolled strip, with at least one physical element cooling a segment of a lateral surface of the hot-rolled strip, with a bearing element for supporting the hot-rolled strip on its lateral surface, with a drive device for rotating the hot-rolled strip around its axis of symmetry and with a control device according to claim 14, by means of which the drive means is operatively connected.
  • the at least one physical element is designed as a bearing element.
  • the physical element thus receives a multiple function. It accomplishes storage of the hot strip bundle and cooling in one component.
  • the apparatus further comprises means for detecting a temperature of the at least one shroud segment, wherein the control means is additionally operatively connected to the temperature detecting means.
  • the control means is additionally operatively connected to the temperature detecting means.
  • the drive device comprises the at least one, in particular physical, element.
  • the drive device comprises a drive roller which is in contact at least in sections with the lateral surface of the hot-rolled strip and which causes the rotation of the hot-rolled strip.
  • the physical element has a bearing function, a drive function and a cooling function.
  • a cooling capacity of the at least one physical element is adjustable, in particular controllable and / or controllable.
  • an additional parameter range for cooling the hot strip bundle can be influenced with which the cooling of the hot strip bundle can be controlled.
  • the controllability or controllability of the cooling capacity of the at least one element allows rapid, targeted influencing of the temperature of shell segments of the hot-rolled strip.
  • FIG. 1 shows a hot strip collar 1, consisting of coiled hot strip 2.
  • the hot strip collar 1 has an axis of symmetry S. This runs perpendicular to the plane through the center of the hot strip Federal 1st
  • the hot strip collar 1 is mounted on three movable rollers. In FIG. 1 one of these rollers is designed as a drive roller 7. The two remaining rollers as passive, rotatably mounted bearing rollers 3. Both the drive roller 7 and the two remaining bearing rollers 3 are physical elements which contact part of the lateral surface 5 of the hot-rolled strip 1. By the drive roller 7, the hot strip collar 1 can be rotated about its axis of symmetry S.
  • the rollers 3 and 7 are configured in the embodiment such that their mantle height is at least as large as the mantle height of the hot-rolled strip 1. That is to say, the rollers contact the lateral surface 5 of the hot-rolled strip 1 over the entire jacket height.
  • the hot strip collar 1 has a temperature significantly above room temperature, the hot strip collar gives off heat both by heat radiation and by heat conduction at the contact points of the bearing rollers 3 and the drive roller 7.
  • the hot strip collar is set in rotation about its axis of symmetry S. This ensures that each point of the lateral surface 5 of the hot strip collar 1 is temporarily contacted by the bearing rollers 3 and the drive roller 7. It thus comes to a uniform cooling of the lateral surface 5 of the hot strip Federal. 1
  • a temperature detection device 6 for detecting the temperature of the lateral surface 5 of the hot-rolled strip 1 is provided.
  • a temperature detection device 6 for contactless detection of the temperature of the lateral surface 5 is provided.
  • the temperature detection device 6 detects the temperature of segments 4 of the lateral surface 5 of the hot strip collar 1.
  • the lateral surface segments are cylinder segments formed at right angles, ie the boundary lines of the segments extending in the lateral surface intersect the base surface of the cylinder at right angles. This is particularly easy to handle in practice.
  • the detected temperature of a jacket segment 4 is fed to a control device 9. Furthermore, an average jacket temperature is calculated from the temperatures of the jacket segments 4, in particular for those which were detected within one revolution of the hot-rolled strip collar 1.
  • the control device 9 now compares the detected temperature of a jacket segment 4 with the mean temperature of the lateral surface 5.
  • the drive roller 7 is controlled as a function of the deviation between the detected temperature of the jacket segment 4 and the middle jacket temperature.
  • the control device 9 controls the drive roller 7 such that the predetermined by the controller change of Rotation speed of the hot strip Federal 1 is only then acted upon by the drive roller 7, when the shell segment 4, of which the temperature has been detected and corresponding control signals were determined for the drive means 7, in contact with the first physical element in the direction of rotation, ie FIG. 1 with a bearing roller 3, occurs.
  • the rotational speed is slowed when the jacket segment 4 comes into contact with the first bearing roller 3, so that the contact time and thus the time for transferring heat between the hot strip collar and the bearing roller 3 or Drive roller 7 is extended.
  • the rotational speed is correspondingly increased upon contact of this jacket segment 4 with the first bearing roller 3 or the second bearing roller 3 or the drive roller 7, so that the contact time and thus the time for heat exchange between bearing rollers 3 and drive roller 7 and shell segment 4 is kept correspondingly low.
  • control device 9 can access a model 10 in which, by means of the heat conduction equation, it is predicted how the temperature of the lateral surface 5 of the hot strip collar 1 changes locally. In particular, it is taken into account here, at which intervals the shell segments 4 have specific temperature differences and predicted over preferably several revolutions of the hot strip Federal 1, how the temperature of the shell segments behaves with a specific control behavior and the cooling of the hot strip Federal influenced so that the most homogeneous properties of the coiled hot strip 2 are guaranteed after cooling.
  • an average rotational speed of the hot strip bundle 1 can be determined by the model module 10, which leads to an optimized rolling behavior in the subsequent cold rolling process.
  • the bearing rollers 3 and the drive roller 7 additionally each have a cooling device 8. This, in particular their cooling capacity, is also controlled by the control device 9.
  • a cooling device 8 for example. Coolants or Peltier elements can be used.
  • the surfaces of the drive roller 7 and the bearing rollers 3 can be thermally conditioned. That is, for example, constant surface temperatures of the rollers 3 and 7 can be adjusted. Alternatively, for example, the surfaces of the drive roller 7 and the bearing rollers 3 can be strongly cooled down to produce a large, desired temperature gradient between the lateral surface 5 of the hot-rolled strip 1 and the surfaces of the bearing rollers 3 and the drive roller 7. This speeds up the cooling of the hot strip bundle.
  • the temperature differences between the shell segments of the lateral surface of the hot strip Federal 1 may not be so large that no longer recoverable inhomogeneities in the hot strip 2 arise.
  • the usable maximum temperature gradient between a shell segment 4 of the hot strip collar 1 and one of the rollers 3 and 7 is u.a. depending on the average rotational speed of the material of the hot strip 2 of the hot strip collar 1 and the jacket temperature of the hot strip collar. 1
  • the apparatus shown achieves that a hot-rolled strip 1 is cooled so uniformly with a predeterminable amount of time that the hot-rolled strip has a homogeneous strip properties, in particular a homogeneous hardness and problems for rolling the strip can be avoided or reduced for a subsequent cold rolling process.
  • FIG. 2 shows a flowchart for an exemplary sequence of the method according to the invention.
  • the hot-rolled strip is set in rotation about its axis of symmetry.
  • a mean jacket temperature is determined in a method step 102.
  • the determination of the jacket temperature is carried out successively on the basis of the new temperature values for the constantly detected temperature of the jacket segments.
  • a comparison with the average jacket temperature in a method step 103 is then made from the detected temperature of a jacket segment.
  • a positive or negative deviation from the mean jacket temperature is determined.
  • a method step 104 it is queried whether a prediction of the cooling process of the hot strip bundle is to be calculated with the aid of a cooling model. As a result, the quality of the cooling process can be further improved.
  • a control of the cooling capacity of the hot strip waistband cooling for example, physical elements which contact the hot-rolled strip sectionwise, should be made. This query is only useful if the cooling capacity of the elements is adjustable.
  • the cooling capacity of the elements which can be adjusted in terms of their cooling capacity can be specifically adjusted, for example, if the hot-rolled strip is to be available for cold rolling within a defined, short time.
  • a control intervention in the drive device for rotating the hot-rolled strip is carried out in a method step 106 on the basis of the detected temperature of the jacket segment and the middle jacket temperature. This is designed such that the control intervention leads to a reduction in the deviation of the temperature of the shroud segment from the average jacket temperature.
  • the drive means is controlled by the control means such that the control action, i. the increase or decrease in the contact time relative to the mean contact time of the sheath segment with the physical element only becomes effective when the respective sheath segment with the associated detected temperature comes into contact with a physical element.
  • the contact time between this sheath segment and the physical element is increased. If the detected temperature of the sheath segment is less than the average sheath temperature, the contact time between that sheath segment concerned and the physical element is also reduced, i. increases the rotational speed until this shell segment again triggers contact with the physical element.
  • a method step 105 the control of a cooling capacity of a physical element can also be affirmed.
  • a calculation and adjustment of the desired cooling capacity takes place in a method step 108.
  • the setting of the Cooling capacity is preferably controlled or regulated on the basis of the detected temperatures of the jacket segments and / or the average jacket temperature.
  • a control intervention is provided in a method step 109 for the drive device, which takes into account the changed cooling capacity of the physical elements contacting the lateral surface of the hot-rolled strip at least in sections.
  • the adjustment of the cooling capacity can be used in particular if, for example, due to a technical defect, homogeneous cooling without adjustable cooling capacity no longer seems possible.
  • method step 104 If it is decided in method step 104 that a precalculation of the cooling process is to take place, it is also to be selected here in a method step 105 whether a control of the cooling capacity of the particular physical element is to take place or not. It then takes a precalculation of the cooling process in dependence on whether a certain cooling capacity of the element should be set or not.
  • a control intervention according to method step 111 for the drive device and the cooling device takes place in such a way that, on the one hand, temperature deviations of the shell segments from the middle jacket temperature are minimized to the extent that the properties of the hot strip collar be optimized for a subsequent cold rolling process by still - as far as possible - influence on the structure of the hot strip bundle is taken.
  • the control intervention can be provided as a function of a cooling time, after which the hot strip bundle must be fed into the cold rolling train, so that there is an optimal utilization of the cold rolling train. Accordingly, the cooling capacity of the at least one element is then adjusted.
  • the control intervention according to method step 110 for the drive device for example, carried out such that the deviation of the shell segment temperatures of the average jacket temperature As low as possible and at the same time the hot strip is still influenced in its properties in such a way that it is as good as possible to handle for the subsequent cold rolling process.
  • the setting of a cooling rate can then take place, for example, via the rotational speed of the hot strip bundle.
  • a query is made in a method step 107 as to whether the method should be continued. If this is the case, a new comparison is made for a jacket segment with the newly determined average jacket temperature. If the process is not continued, the process ends after the last control intervention.
  • a controlled uniform cooling of a hot strip bundle can be provided, which is optimized in terms of a homogeneous hardness, a hardness optimized with respect to the cold rolling and optionally with regard to a cooling time.

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  • Mechanical Engineering (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Metal Rolling (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Kühlen eines zu einem Warmbandbund aufgehaspelten Warmbands mittels einer von einem Haspel verschiedenen Zwischenlagereinrichtung. Ferner betrifft die Erfindung eine Vorrichtung zum Kühlen eines Warmbandbundes sowie eine Steuer- und/oder Regeleinrichtung für eine Vorrichtung zum Kühlen eines Warmbandbundes.The invention relates to a method for cooling a hot strip coiled into a hot-rolled strip by means of an intermediate storage device that is different from a reel. Furthermore, the invention relates to a device for cooling a hot strip Federal as well as a control and / or regulating device for a device for cooling a hot strip Federal.

Aus der Offenlegungsschrift JP 59045018 A ist bekannt, ein warmgewalztes Band in einem gegen die Aussenluft versiegeltem Tank auf einen Dorn zu wickeln und durch das Wasser im Tank bzw. durch aufgesprühtes Wasser zu kühlen.From the publication JP 59045018 A It is known to wind a hot-rolled strip in a sealed against the outside air tank on a mandrel and to cool by the water in the tank or by sprayed water.

Bei der Herstellung von Warmband mittels einer Warmwalzstrasse wird in der Regel am Ende der Warmwalzstrasse das Warmband auf einer Haspel zu einem Warmbandbund aufgehaspelt. Dabei hat das Warmband in der Regel bereits eine Kühlstrecke durchlaufen, in welcher das gewünschte Gefüge des Warmbands und damit dessen Eigenschaften eingestellt wurden. Metalle, welche derartige Prozesse durchlaufen, sind beispielsweise Stahl, Aluminium und Kupfer. Jedoch werden in Warmwalzstraßen auch andere Bänder anderer Metalle prozessiert.In the production of hot strip by means of a hot rolling line, the hot strip is usually wound on a reel to a hot strip coil at the end of the hot rolling line. In this case, the hot strip has usually already run through a cooling section in which the desired structure of the hot strip and thus its properties have been set. Metals undergoing such processes are, for example, steel, aluminum and copper. However, in hot rolling mills other bands of other metals are processed.

Insbesondere bei Gefügen moderner Metallqualitäten, insbesondere von Stahl, Aluminium und Kupfer, kann es vorkommen, dass sich deren metallurgischen Eigenschaften auch noch nach dem eigentlichen Warmwalzen verändern. Es kann beispielsweise während des Abkühlens des Warmbandbundes zu lokalen Verhärtungen des Warmbandbundes auf der Bundablage kommen, welche in einem sich anschließenden Kaltwalzprozess für dieses Warmbandbund zu kaum beherrschbaren Störung für die Bandqualität dieses Metallbands führen können. Insbesondere treten derartige Störungen durch das Abwickeln des Warmbandbundes zyklisch mit variabler Periodendauer auf, bedingt durch den sich beim Abwickeln ändernden Bundumfang. Durch derartige zyklische Härteschwankungen kann es beispielsweise in mehrgerüstiParticularly in the case of structures of modern metal qualities, in particular of steel, aluminum and copper, it may happen that their metallurgical properties also change after the actual hot rolling. For example, during the cooling of the hot strip bundle, local hardening of the hot strip bundle may occur on the bundle tray, which in a subsequent cold rolling process can lead to hardly controllable disturbance for the strip quality of this metal strip for this hot strip bundle. In particular, such disturbances occur cyclically by the unwinding of the hot strip Federal with variable period, due to the changing during unwinding waistband circumference. By such cyclical hardness fluctuations, it can for example in mehrgerüsti

gen Kaltwalzwerken, insbesondere Tandemwalzwerken, zu selbstverstärkenden Schwingungen kommen, die die Bandqualität des herzustellenden Metallbandes negativ beeinflussen.cold rolling mills, especially tandem mills, come to self-reinforcing vibrations that adversely affect the strip quality of the metal strip to be produced.

Um dieses Problem von selbstverstärkenden Schwingungen bei mehrgerüstigen Kaltwalzstrassen zu vermeiden, kann beispielsweise vorgesehen werden, dass Metallbänder derart empfindlicher Metallqualitäten auf einem eingerüstigen Kaltwalzwerk gewalzt werden.To avoid this problem of self-reinforcing vibrations in multi-stand cold rolling mills, it can be provided, for example, that metal strips of such sensitive metal grades are rolled on a single-stand cold rolling mill.

Dies führt jedoch zu einer erhöhten Walzzeit des jeweiligen Metallbandes, um die Endabmessungen des jeweiligen Metallbands zu erreichen und ist somit wirtschaftlich von Nachteil gegenüber dem Walzen des Metallbandes in einer mehrgerüstigen Kaltwalzstrasse.However, this leads to an increased rolling time of the respective metal strip in order to achieve the final dimensions of the respective metal strip and is thus economically disadvantageous compared to rolling the metal strip in a multi-stand cold rolling line.

Aus der Offenlegungsschrift DT 24 50 548 A1 ist eine Kühlvorrichtung für Walzgut, insbesondere Bandbunde bekannt, welche mit Hilfe von sich zeitweise durch ein Kühlflüssigkeitstrog bewegenden Gondeln gekühlt werden. Diese Lösung ist sehr raumintensiv und für die Erfordernisse moderner Metallqualitäten ungeeignet.German Offenlegungsschrift DT 24 50 548 A1 discloses a cooling device for rolling stock, in particular strip coils, which are cooled by means of gondolas which are temporarily moved by a cooling liquid trough. This solution is very space-intensive and unsuitable for the requirements of modern metal qualities.

Aus der US-Patentschrift US 4,869,089 ist eine Vorrichtung bekannt, welche einen Wärmeabfluss vom Warmbandbund verhindert, indem - wird eine vorgegebene Temperaturdifferenz zwischen einer äußeren und einer inneren Schicht des Warmbandbunds überschritten - eine wärmeisolierende Bedeckung, so dass die Abkühlrate der äußersten Schicht des Warmbandbunds verringert wird. Somit befasst sich diese Schrift mit vergleichsweise - auf die Bandlänge bezogen - großräumigen Temperatur-Störungen beim Abkühlen von Warmbandbunden während deren Zwischenlagerung.From the US patent US 4,869,089 For example, there is known a device which prevents heat leakage from the hot strip by, when a predetermined temperature difference between an outer and an inner layer of the hot strip is exceeded, a heat insulating cover, so that the cooling rate of the outermost layer of the hot strip is reduced. Thus, this document is concerned with comparatively - related to the strip length - large-scale temperature disturbances during cooling of hot rolled coils during their intermediate storage.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung bereitzustellen, mit welchen auf kompakter Art und Weise für im Vergleich zur Mantelfläche des Warmbandbunds kleine Mantelflächenbereiche homogene Bandeigenschaften des Warmbandbunds, insbesondere in Umfangsrichtung, erhalten werden können.The invention has for its object to provide a method and an apparatus with which in a compact manner for compared to the lateral surface of the hot strip collar small lateral surface areas homogeneous band properties of the hot-rolled strip, in particular in the circumferential direction, can be obtained.

Der dem Verfahren zuzuordnende Teil der Aufgabe wird gelöst durch ein Verfahren zum Kühlen eines zu einem Warmbandbund aufgehaspelten Warmbands mittels einer von einem Haspel verschiedenen Zwischenlagereinrichtung, wobei das Warmbandbund während der Zwischenlagerung um seine Symmetrieachse gedreht und wenigstens abschnittsweise auf seiner Mantelfläche gelagert wird und durch Kontakt seiner Mantelfläche mit wenigstens einem körperlichen Element gekühlt wird. Unter Mantelfläche wird die radial nach außen gewandte Begrenzungsfläche des Warmbandbundes angesehen, welche durch die Breite des aufgehaspelten Warmbands der äußersten Wicklung gebildet wird. Die Symmetrieachse des Warmbandbunds verläuft im Wesentlichen durch den Mittelpunkt des Warmbandbundes senkrecht zur radialen Ausdehnung des Warmbandbundes. Durch eine Drehung um diese Symmetrieachse zur Bereitstellung von homogenen Bandeigenschaften nach dem Abkühlen wird eine besonders kompakt ausführbare Verfahrensweise bereitgestellt. Das körperliche Element weist eine feste, abgegrenzte Form ggü. seiner Umgebung auf, wobei unterschiedlichste Elastizitäten realisiert werden können. Bspw. kann das körperliche Element als starrer Körper ausgebildet sein, wobei die Mantelfläche mit einem elastischen Material wenigstens abschnittsweise bedeckt ist, um den Warmbandbund schonend zu lagern und Beschädigungen der Oberfläche zu vermeiden. Zusätzlich kann das Material in seinen thermischen Eigenschaften entsprechend der gewünschten Abkühlrate eingestellt werden. Dadurch ist es möglich, die thermo-mechanischen Eigenschaften des körperlichen Elements passend einzustellen. Insbesondere kann ein derartiges körperliches Element derart ausgebildet sein, dass es die Drehung des Warmbandbundes um seine Symmetrieachse verursacht. Indem ein körperliches Element zur gleichmäßigen Kühlung des Warmbandbundes verwendet wird, wird eine technisch besonders einfache, wenig Raum beanspruchende Lösung bereitgestellt. Ein körperliches Element ist vorzugsweise derart ausgebildet, dass es die Mantelfläche des Warmbandbundes im Wesentlichen auf der gesamten Mantelhöhe kontaktiert. Die Zwischenlagereinrichtung kann bspw. als Vorratsspeichereinrichtung für Warmbandbunde oder als Transporteinrichtung für Warmbandbunde ausgebildet sein. Insbesondere mittels einer solchen Transporteinrichtung können einerseits die Warmbandbunde zu bestimmten Positionen innerhalb einer Walzanlage gebracht werden, andererseits werden diese durch das erfindungsgemäße Verfahren während des Transports gleichmäßig über den Umfang abgekühlt, wodurch der Warmbandbund eine gleichmäßig hohe Strukturqualität aufweist.The part of the object to be assigned to the method is achieved by a method for cooling a hot strip coiled into a hot strip by means of an intermediate storage device, wherein the hot strip is rotated about its axis of symmetry during intermediate storage and stored at least in sections on its lateral surface and by contact of its Jacket surface is cooled with at least one physical element. Under lateral surface, the radially outwardly facing boundary surface of the hot strip bundle is considered, which is formed by the width of the coiled hot strip of the outermost winding. The symmetry axis of the hot strip collar runs essentially through the center of the hot strip collar perpendicular to the radial extent of the hot strip collar. By a rotation about this axis of symmetry to provide homogeneous band properties after cooling, a particularly compact procedure is provided. The physical element has a fixed, demarcated form compared to. its environment, where a variety of elasticities can be realized. For example. For example, the physical element may be formed as a rigid body, wherein the lateral surface is covered with an elastic material at least in sections, in order to store the hot-rolled strip gently and to avoid damage to the surface. In addition, the material can be adjusted in its thermal properties according to the desired cooling rate. This makes it possible to suitably adjust the thermo-mechanical properties of the physical element. In particular, such a physical element can be designed such that it causes the rotation of the hot strip collar about its axis of symmetry. By using a physical element for uniform cooling of the hot strip bundle, a technically particularly simple, less space consuming solution is provided. A physical element is preferably designed such that it covers the lateral surface of the hot-rolled strip in the Essentially contacted on the entire mantle height. The intermediate storage device can be designed, for example, as a storage device for hot strip bundles or as a transport device for hot strip bundles. In particular, by means of such a transport device on the one hand, the hot strip bundles can be brought to certain positions within a rolling mill, on the other hand they are cooled by the inventive method during transport evenly over the circumference, whereby the hot strip has a uniformly high structural quality.

In einer bevorzugten Ausführungsform der Erfindung wird das körperliche Element gleichzeitig als Lagerelement zur Lagerung des Warmbandbunds verwendet. Das körperliche Element kann beispielsweise als bewegbare Lagerrolle ausgebildet sein, auf welcher das Warmbandbund um seine Symmetrieachse gedreht wird. Ferner ist das körperliche Element in diesem Fall derart ausgebildet, dass es das Gewicht des Warmbandbunds wenigstens teilweise aufnehmen kann. Der Begriff Lagerung ist im Rahmen dieser Anmeldung i. d. R. derart zu verstehen, dass die Lagerung stets auch eine Aufnahme einer Gewichtskraft des Warmbandbunds durch das Lagerelement bedingt. Biege-Rollen zu einem auf einem Haspeldorn gelagerten Warmbandbund sind z.B. keine Lagerelemente, da diese i.d.R. keine Gewichtskraft des Warmbandbunds aufnehmen, sondern lediglich Biegekräfte zur Formgebung des Warmbandbunds aufbringen.In a preferred embodiment of the invention, the physical element is used simultaneously as a bearing element for the storage of the hot strip collar. The physical element may for example be designed as a movable bearing roller on which the hot-rolled strip is rotated about its axis of symmetry. Furthermore, the physical element in this case is designed such that it can at least partially absorb the weight of the hot-rolled band. The term storage is in the context of this application i. d. R. be understood in such a way that the storage always requires a recording of a weight of the hot strip collar by the bearing element. Bend rolls to a hot strip bundle mounted on a coiler mandrel are e.g. no bearing elements, as these i.d.R. do not absorb the weight of the hot strip collar, but only apply bending forces to form the hot strip collar.

In einer vorteilhaften Ausgestaltung der Erfindung wird eine mittlere Manteltemperatur des Warmbandbundes ermittelt, eine Temperatur für ein Segment der Mantelfläche erfasst, in Abhängigkeit einer Abweichung von der Temperatur des Mantelsegments von der mittleren Manteltemperatur eine Kontaktzeit des Mantelsegments mit dem wenigstens ein Element derart eingestellt, dass sich die Abweichung verringert. Dadurch wird erreicht, dass lokale Temperaturschwankungen der Mantelfläche des Warmbandbundes gezielt stärker oder schwächer gekühlt werden können, um eine möglichst gleiche Temperatur für alle Segmente der Mantelfläche zu erreichen. Es ist jederzeit nachvollziehbar und überprüfbar, welche Segmente der Mantelfläche eine besonders hohe Abweichung von einer mittleren Manteltemperatur aufweisen und daher einer besonders hohen oder niedrigen Kühlung bedürfen. Insofern kann durch Einstellung der Kontaktzeit des jeweiligen Mantelsegments mit dem wenigstens einen körperlichen Element eine Wärmeabgabe des jeweiligen Mantelsegments an das körperliche Element eingestellt werden. Dadurch wird die Genauigkeit zur Erreichung homogener Bandeigenschaften bzw. Bundeigenschaften erhöht.In an advantageous embodiment of the invention, an average jacket temperature of the hot strip collar is determined, detects a temperature for a segment of the lateral surface, depending on a deviation from the temperature of the jacket segment of the average jacket temperature, a contact time of the jacket segment with the at least one element set such that reduces the deviation. It is thereby achieved that local temperature fluctuations of the lateral surface of the hot strip bundle can be deliberately cooled more strongly or less, in order to achieve the same temperature as possible for all segments of the lateral surface. It is always comprehensible and verifiable which segments of the lateral surface have a particularly high deviation from a mean jacket temperature and therefore require a particularly high or low cooling. In this respect, by adjusting the contact time of the respective sheath segment with the at least one physical element, a heat output of the respective sheath segment can be adjusted to the physical element. This increases the accuracy for achieving homogeneous band properties.

Insbesondere ist es von Vorteil, dass durch eine vorgebbare Drehgeschwindigkeit des Warmbandbundes eine mittlere Kontaktzeit eines Mantelsegments mit dem wenigstens ein Element eingestellt wird, wobei bei positiver bzw. negativer Temperaturabweichung die Kontaktzeit relativ zur mittleren Kontaktzeit erhöht bzw. erniedrigt wird. Durch diese Vorgehensweise ist es möglich, besonders einfach eine geringe Abweichung von Temperaturen der Mantelsegmente zur mittleren Manteltemperatur bereitzustellen. Mit anderen Worten bedeutet dies, dass die Drehgeschwindigkeit des Warmbandbundes davon abhängig ist, welche Temperatur das Segment der Mantelfläche aufweist, welches gerade das Element, insbesondere das körperliche Element, kontaktiert.In particular, it is advantageous that a mean contact time of a sheath segment with the at least one element is set by a predefinable rotational speed of the hot-rolled strip, wherein with positive or negative temperature deviation, the contact time is increased or decreased relative to the average contact time. This procedure makes it possible to provide a slight deviation from the temperatures of the jacket segments to the average jacket temperature in a particularly simple manner. In other words, this means that the rotational speed of the hot strip bundle is dependent on which temperature has the segment of the lateral surface, which just contacted the element, in particular the physical element.

In einer bevorzugten Ausgestaltung der Erfindung wird die Temperatur des Mantelsegments kontaktlos erfasst. Dadurch ergeben sich einerseits keine Verfälschungen durch eine kontaktbehaftete Temperaturmessung, welche durch den Kontakt zu Wärmeabfluss vom Warmbandbund auf die Temperaturerfassungseinrichtung führen würde. Andererseits existiert eine Mehrzahl an bekannten und messtechnisch genauen Vorrichtungen zur kontaktlosen Temperaturerfassung, mit welcher die Temperatur eines Mantelsegments erfasst werden kann. Beispielsweise können Pyrometer und/oder Ondometer Verwendung finden.In a preferred embodiment of the invention, the temperature of the sheath segment is detected contactless. As a result, on the one hand, there are no distortions due to a contact-type temperature measurement, which would lead to contact with the heat flow from the hot-rolled strip to the temperature detection device. On the other hand, there are a plurality of known and metrologically accurate devices for contactless temperature detection, with which the temperature of a shroud segment can be detected. For example, pyrometers and / or ondometers can be used.

In einer weiteren vorteilhaften Ausgestaltung der Erfindung wird die mittlere Manteltemperatur aus einer Vielzahl von für verschiedene Mantelsegmente erfasste Temperaturen ermittelt. Die mittlere Manteltemperatur ist daher stets auf Messwerte der Vielzahl für verschiedene Mantelsegmente erfasste Temperaturen zurückgeführt. Vorzugsweise wird die mittlere Temperatur der Mantelfläche aus den erfassten Temperaturen der Mantelsegmente innerhalb der letzten Umdrehung des Warmbandbundes gebildet. So wird für die Ermittlung der mittleren Manteltemperatur stets der letzte Messwerte eines bestimmten Mantelsegments durch den neuen Messwert für dieses Mantelsegment ersetzt, wodurch eine entsprechenden Anpassung der mittleren Manteltemperatur an das ständige Abkühlen des Warmbandbundes erfolgt. Durch die Verwendung einer Vielzahl von Mantelsegmenten, wird einerseits die Genauigkeit für die Gleichmäßigkeit der Abkühlung des Warmbandbundes erhöht, und gleichzeitig die Bestimmung der mittleren Manteltemperatur verbessert.In a further advantageous embodiment of the invention, the average jacket temperature is determined from a multiplicity of temperatures detected for different jacket segments. The mean jacket temperature is therefore always traced back to measured values of the multiplicity of temperatures detected for different jacket segments. Preferably, the average temperature of the lateral surface is formed from the detected temperatures of the shell segments within the last revolution of the hot strip bundle. Thus, for the determination of the average jacket temperature, the last measured values of a specific jacket segment are always replaced by the new measured value for this jacket segment, whereby a corresponding adaptation of the average jacket temperature to the constant cooling of the hot-rolled collar occurs. By using a plurality of shell segments, on the one hand, the accuracy for the uniformity of the cooling of the hot strip is increased, and at the same time improves the determination of the average jacket temperature.

In einer weiteren vorteilhaften Ausgestaltung der Erfindung wird eine Abkühlung eines Mantelsegments durch das wenigstens ein Element mit Hilfe eines Modells vorausberechnet und die Kontaktzeit auf Grundlage der Berechnung eingestellt. Dies ist insbesondere von Vorteil, wenn eine Mehrzahl von körperlich, kühlend wirkenden Elementen vorgesehen ist, welche gleichzeitig unterschiedliche Mantelsegmente des Warmbandbundes kontaktieren. Ein solches Modell basiert auf der Wärmeleitungsgleichung und kann ferner noch mögliche Phasenübergänge für das abzukühlende Metall miteinbeziehen. Auch können Wärmestrahlung und Wärmekonvektion für das Warmbandbund miteinbezogen werden. Durch die Verwendung eines Abkühlmodells zur Abkühlung des Warmbandbundes kann eine besonders genaue und zielgerichtete Abkühlung des Warmbandbundes erreicht werden. Insbesondere kann der Abkühlprozess derart geändert werden, dass bspw. die Summe der Abweichungen der Temperaturen der Mantelsegmente von der mittleren Manteltemperatur für eine zu erreichende vorgebbare Temperatur minimal wird. Die Drehung des Warmbandbundes wird dann durch die Modellvorgaben derart gesteuert, dass das gewünschte Resultat erreicht wird. Insbesondere kann durch den Einsatz eines Modells erreicht werden, dass das aufgehaspelte Warmband bzw. der Warmbandbund homogene Gefügeeigenschaften aufweist und beispielsweise unerwünschte Bandeigenschaften bzw. Warmbandbundeigenschaften des Warmbandbundes durch Einbeziehung der durch den Abkühlprozess bedingten Änderungen von Bandeigenschaften bzw. Warmbandbundeigenschaften noch während des Abkühlens vermieden oder behoben werden können. Durch die Verwendung eines Modells für den Abkühlprozess kann gegebenenfalls das Gefüge noch derart beeinflusst werden, dass es für ein nachfolgendes Kaltwalzen optimiert ist. Dies kann insofern nicht nur Härteschwankungen des Metallbands betreffen, sondern auch die Härte des Metallbands als solche. Insbesondere kann bspw. durch die Ermittlung einer geeigneten Abkühlrate innerhalb der möglichen Toleranzen ein für die Anforderungen des Kaltwalzens optimiertes Band bereitgestellt werden.In a further advantageous embodiment of the invention, a cooling of a shell segment by the at least one element is precalculated by means of a model and set the contact time based on the calculation. This is particularly advantageous if a plurality of physical, cooling-acting elements is provided, which simultaneously contact different shell segments of the hot-rolled strip. Such a model is based on the heat equation and may also include possible phase transitions for the metal to be cooled. Also, heat radiation and convection for the hot strip can be included. By using a cooling model for cooling the hot strip bundle, a particularly accurate and targeted cooling of the hot strip bundle can be achieved. In particular, the cooling process can be changed in such a way that, for example, the sum of the deviations of the temperatures of the shell segments from the mean jacket temperature becomes minimal for a predefinable temperature to be achieved. The rotation of the hot strip is then controlled by the model specifications to achieve the desired result. In particular, can be achieved by the use of a model that the coiled hot strip or the hot strip has homogeneous microstructural properties and, for example, unwanted band properties or hot-rolled properties of the hot strip bundle can be avoided or eliminated by including the changes in strip properties or hot strip bundle properties caused by the cooling process during the cooling process. By using a model for the cooling process, if appropriate, the structure can still be influenced in such a way that it is optimized for a subsequent cold rolling. This may involve not only hardness variations of the metal strip, but also the hardness of the metal strip as such. In particular, for example, by determining a suitable cooling rate within the possible tolerances, a band optimized for the requirements of cold rolling can be provided.

In einer weiteren vorteilhaften Ausgestaltung der Erfindung wird eine Kühlleistung des wenigstens einen Elements eingestellt, vorzugsweise gesteuert und/oder geregelt. Dies erlaubt es, dass beispielsweise einem körperlichen Element ein Kühlmedium zugeführt wird, mit welchem zusätzlich die Wärmeabfuhr aus dem jeweils mit dem Element in Kontakt stehenden Mantelsegment beeinflusst werden kann. Bei einem flüssigen oder gasförmigen Element kann bspw. ein ständiger Stoffaustausch erfolgen, um eine entsprechende Kühlleistung sicherzustellen und bspw. ein Erwärmen des Elements auf eine unerwünschte Temperatur zu vermeiden. Die Einstellung der Kühlleistung ist beispielsweise dann zweckmäßig, wenn besonders hohe Abweichungen von Temperaturen einzelner Mantelsegmente von der mittleren Manteltemperatur auftreten. Würden derartige Abweichungen alleine durch die Kontaktzeit mit dem kühlenden Element ohne Beeinflussung der Kühlleistung erfolgen, so hat dies bspw. eine signifikante Erhöhung der Abkühldauer für den gesamten Warmbandbund zur Folge. Um die Abkühlungszeit des gesamten Warmbandbundes auch unter solchen Umständen gering zu halten, kann dann beispielsweise eine Kühlleistung des wenigstens ein Elements erhöht werden, um die Temperatur dieses Mantelsegments möglichst schnell an die mittleren Mantelsegmenttemperatur anzugleichen. Gegebenenfalls kann durch die gezielte Steuerung bzw. Regelung der Kühlleistung des wenigstens ein Elements noch ein gewünschter Einfluss auf das Gefüge des Warmbandbundes realisiert werden. Insbesondere ist bei der Steuerung bzw. Regelung der Kühlleistung des wenigstens ein Elements die Abkühlrate des Warmbandbundes vorgebbar. Dies bedeutet, dass gegebenenfalls zur Auffüllung von Prozesslücken in der Kaltwalzstrasse beispielsweise Warmbandbund schneller aber dennoch gleichmäßig abgekühlt wird, um beispielsweise eine Kaltwalzstrasse optimal auszulasten.In a further advantageous embodiment of the invention, a cooling capacity of the at least one element is adjusted, preferably controlled and / or regulated. This makes it possible, for example, for a physical element to be supplied with a cooling medium with which, in addition, the heat dissipation from the shell segment which is in contact with the element can be influenced. In the case of a liquid or gaseous element, for example, a constant mass transfer can take place in order to ensure a corresponding cooling capacity and, for example, to avoid heating of the element to an undesired temperature. The setting of the cooling power is useful, for example, if particularly high deviations of temperatures of individual jacket segments from the average jacket temperature occur. If such deviations take place solely through the contact time with the cooling element without influencing the cooling power, this has, for example, a significant increase in the cooling time for the entire hot strip bundle. In order to keep the cooling time of the entire hot strip bundle low even under such circumstances, then, for example, a cooling capacity of the at least one element can be increased to equalize the temperature of this sheath segment as quickly as possible to the average shell segment temperature. Optionally, by the targeted control or regulation of the cooling capacity of the at least one element nor a desired influence on the microstructure of the hot strip bundle can be realized. In particular, in the control or regulation of the cooling capacity of the at least one element, the cooling rate of the hot strip bundle can be predetermined. This means that, for example, to fill process gaps in the cold rolling train, for example, hot strip coil is cooled faster but still uniformly, for example, to optimally utilize a cold rolling train.

Der vorrichtungsmäßige Teil der Aufgabe wird gelöst durch eine Steuer- und/oder Regeleinrichtung für eine Vorrichtung zum Kühlen eines Warmbandbundes, mit maschinenlesbaren Programmcode, welcher Steuerbefehle aufweist, die bei Ausführung des Programmcodes die Steuer- und/oder Regeleinrichtung zur Durchführung eines Verfahrens nach einem der Ansprüche 1 bis 8 veranlassen. Durch die Verwendung einer Steuer- und/oder Regeleinrichtung zur Durchführung des obig beschriebenen Verfahrens, kann eine besonders hohe Genauigkeit beim Abkühlen des Warmbandbundes realisiert werden, was sich in einer verbesserten Walzfähigkeit des Warmbandbundes in der Kaltwalzstrasse niederschlägt.The device-related part of the object is achieved by a control and / or regulating device for a device for cooling a hot-rolled strip, with machine-readable program code, which has control commands, the execution of the program code, the control and / or regulating device for performing a method according to one of Induce claims 1 to 8. By using a control and / or regulating device for carrying out the method described above, a particularly high accuracy when cooling the hot strip bundle can be realized, which is reflected in an improved rolling ability of the hot strip in the cold rolling mill.

Der vorrichtungsmäßige Teil der Aufgabe wird ebenfalls gelöst durch eine Vorrichtung zum Kühlen eines Warmbandbundes, mit wenigstens einem ein Segment einer Mantelfläche des Warmbandbundes kühlenden körperlichen Element, mit einem Lagerelement zur Lagerung des Warmbandbunds auf seiner Mantelfläche, mit einer Antriebseinrichtung zum Drehen das Warmbandbunds um seine Symmetrieachse und mit einer Steuereinrichtung nach Anspruch 14, mittels der die Antriebseinrichtung wirkverbunden ist. Durch eine derartige Vorrichtung wird eine besonders einfache und genaue Möglichkeit zur Abkühlung von Warmbandbunden, insbesondere abkühlungsempfindlichen Warmbandbunden, ermöglicht.The device-related part of the object is likewise achieved by a device for cooling a hot-rolled strip, with at least one physical element cooling a segment of a lateral surface of the hot-rolled strip, with a bearing element for supporting the hot-rolled strip on its lateral surface, with a drive device for rotating the hot-rolled strip around its axis of symmetry and with a control device according to claim 14, by means of which the drive means is operatively connected. By such a device is a particularly simple and accurate way to cool hot strip coils, especially cooling sensitive hot-rolled coils, allows.

In einer besonders vorteilhaften Ausführungsform ist das wenigstens eine körperliche Element als Lagerelement ausgestaltet. Dadurch kann die Kompaktheit der Vorrichtung weiter erhöht werden. Das körperliche Element erhält dadurch eine Mehrfachfunktion. Es bewerkstelligt Lagerung des Warmbandbunds und Kühlung in einem Bauteil.In a particularly advantageous embodiment, the at least one physical element is designed as a bearing element. Thereby, the compactness of the device can be further increased. The physical element thus receives a multiple function. It accomplishes storage of the hot strip bundle and cooling in one component.

Vorzugsweise umfasst die Vorrichtung ferner eine Einrichtung zur Erfassung einer Temperatur des wenigstens einen Mantelsegments, wobei die Steuereinrichtung zusätzlich mit der Temperaturerfassungseinrichtung wirkverbunden ist. Dadurch ist es möglich, einen geschlossenen Regelkreislauf zu realisieren. Dadurch wird die Qualität des Warmbandbunds weiter erhöht.Preferably, the apparatus further comprises means for detecting a temperature of the at least one shroud segment, wherein the control means is additionally operatively connected to the temperature detecting means. This makes it possible to realize a closed loop control. As a result, the quality of the hot strip collar is further increased.

In einer besonders vorteilhaften Ausgestaltung umfasst die Antriebseinrichtung des wenigstens eine, insbesondere körperliche, Element. Insbesondere umfasst die Antriebseinrichtung eine mit der Mantelfläche des Warmbandbunds wenigstens abschnittsweise in Kontakt stehende Antriebsrolle, welche die Drehung des Warmbandbundes verursacht. Dadurch wird eine besonders kompakte Ausgestaltung der Vorrichtung ermöglicht. Somit kommt dem körperlichen Element eine Lagerfunktion, eine Antriebsfunktion und eine Kühlfunktion zu.In a particularly advantageous embodiment, the drive device comprises the at least one, in particular physical, element. In particular, the drive device comprises a drive roller which is in contact at least in sections with the lateral surface of the hot-rolled strip and which causes the rotation of the hot-rolled strip. This allows a particularly compact design of the device. Thus, the physical element has a bearing function, a drive function and a cooling function.

In einer besonders vorteilhaften Ausgestaltung der Erfindung ist eine Kühlleistung des wenigstens einen körperlichen Elements einstellbar, insbesondere steuerbar und/oder regelbar. Dadurch ist ein zusätzlicher Parameterbereich zur Abkühlung des Warmbandbundes beeinflussbar, mit welchem die Abkühlung des Warmbandbundes gesteuert werden kann. Ferner erlaubt die Steuerbarkeit bzw. Regelbarkeit der Kühlleistung des wenigstens ein Elements eine schnelle, zielgerichtete Beeinflussung der Temperatur von Mantelsegmenten des Warmbandbundes.In a particularly advantageous embodiment of the invention, a cooling capacity of the at least one physical element is adjustable, in particular controllable and / or controllable. As a result, an additional parameter range for cooling the hot strip bundle can be influenced with which the cooling of the hot strip bundle can be controlled. Furthermore, the controllability or controllability of the cooling capacity of the at least one element allows rapid, targeted influencing of the temperature of shell segments of the hot-rolled strip.

Weitere Vorteile der Erfindung ergeben sich aus dem nachfolgenden Ausführungsbeispiel, welche anhand schematischer Zeichnungen genauer erläutert werden. Es zeigen:

FIG 1
eine schematische Ansicht einer Vorrichtung zum Kühlen eines Warmbandbundes geeignet zur Ausführung des erfindungsgemäßen Verfahrens,
FIG 2
ein Ablaufdiagramm zur schematischen Darstellung des Ablaufs des erfindungsgemäßen Verfahrens.
Further advantages of the invention will become apparent from the following embodiment, which are explained in more detail with reference to schematic drawings. Show it:
FIG. 1
a schematic view of an apparatus for cooling a hot strip Federal suitably for carrying out the method according to the invention,
FIG. 2
a flowchart for schematically illustrating the sequence of the method according to the invention.

FIG 1 zeigt einen Warmbandbund 1, bestehend aus aufgehaspeltem Warmband 2. Der Warmbandbund 1 weist eine Symmetrieachse S auf. Diese verläuft senkrecht zur Zeichenebene durch die Mitte des Warmbandbundes 1. FIG. 1 shows a hot strip collar 1, consisting of coiled hot strip 2. The hot strip collar 1 has an axis of symmetry S. This runs perpendicular to the plane through the center of the hot strip Federal 1st

Der Warmbandbund 1 ist auf drei bewegbaren Rollen gelagert. In FIG 1 ist eine dieser Rollen als Antriebsrolle 7 ausgebildet. Die zwei übrigen Rollen als passive, drehbar gelagerte Lagerrollen 3. Sowohl die Antriebsrolle 7 als auch die zwei übrigen Lagerrollen 3 sind körperliche Elemente, welche einen Teil der Mantelfläche 5 des Warmbandbundes 1 kontaktieren. Durch die Antriebsrolle 7 kann das Warmbandbund 1 um seine Symmetrieachse S gedreht werden. Die Rollen 3 bzw. 7 sind im Ausführungsbeispiel derart ausgestaltet, dass ihre Mantelhöhe mindestens so groß wie die Mantelhöhe des Warmbandbundes 1 ist. D.h. die Rollen kontaktieren über die gesamte Mantelhöhe die Mantelfläche 5 des Warmbandbundes 1.The hot strip collar 1 is mounted on three movable rollers. In FIG. 1 one of these rollers is designed as a drive roller 7. The two remaining rollers as passive, rotatably mounted bearing rollers 3. Both the drive roller 7 and the two remaining bearing rollers 3 are physical elements which contact part of the lateral surface 5 of the hot-rolled strip 1. By the drive roller 7, the hot strip collar 1 can be rotated about its axis of symmetry S. The rollers 3 and 7 are configured in the embodiment such that their mantle height is at least as large as the mantle height of the hot-rolled strip 1. That is to say, the rollers contact the lateral surface 5 of the hot-rolled strip 1 over the entire jacket height.

Weist das Warmbandbund 1 eine Temperatur deutlich oberhalb der Raumtemperatur auf, so gibt der Warmbandbund sowohl durch Wärmestrahlung als auch durch Wärmeleitung an den Kontaktstellen der Lagerrollen 3 bzw. der Antriebsrolle 7 Wärme ab.If the hot strip collar 1 has a temperature significantly above room temperature, the hot strip collar gives off heat both by heat radiation and by heat conduction at the contact points of the bearing rollers 3 and the drive roller 7.

Zur Vermeidung einer ungleichmäßigen Auskühlung an den Kontaktbereichen des Warmbandbundes 1 mit den Lagerrollen 3 bzw. der Antriebsrolle 7 wird der Warmbandbund in Rotation um seine Symmetrieachse S gesetzt. Dadurch wird erreicht, dass jede Stelle der Mantelfläche 5 des Warmbandbundes 1 zeitweise von den Lagerrollen 3 bzw. der Antriebsrolle 7 kontaktiert wird. Es kommt somit zu einem gleichmäßigen Abkühlen der Mantelfläche 5 des Warmbandbundes 1.To avoid uneven cooling at the contact areas of the hot strip Federal 1 with the bearing rollers 3 and the drive roller 7, the hot strip collar is set in rotation about its axis of symmetry S. This ensures that each point of the lateral surface 5 of the hot strip collar 1 is temporarily contacted by the bearing rollers 3 and the drive roller 7. It thus comes to a uniform cooling of the lateral surface 5 of the hot strip Federal. 1

Zur weiteren Verbesserung des gleichmäßigen Abkühlens des Warmbandbundes 1 ist eine Temperaturerfassungseinrichtung 6 zur Erfassung der Temperatur der Mantelfläche 5 des Warmbandbundes 1 vorgesehen.To further improve the uniform cooling of the hot-rolled strip 1, a temperature detection device 6 for detecting the temperature of the lateral surface 5 of the hot-rolled strip 1 is provided.

In FIG 1 ist eine Temperaturerfassungseinrichtung 6 zur kontaktlosen Erfassung der Temperatur der Mantelfläche 5 vorgesehen. Insbesondere erfasst die Temperaturerfassungseinrichtung 6 die Temperatur von Segmenten 4 der Mantelfläche 5 des Warmbandbundes 1. Im Ausführungsbeispiel handelt es sich bei den Mantelflächensegmenten um rechtwinklig ausgebildete Zylindersegmente, d.h. die in der Mantelfläche verlaufenden Begrenzungslinien der Segmente schneiden die Grundfläche des Zylinders rechtwinklig. Dies ist in der Praxis besonders einfach handhabbar.In FIG. 1 a temperature detection device 6 for contactless detection of the temperature of the lateral surface 5 is provided. In particular, the temperature detection device 6 detects the temperature of segments 4 of the lateral surface 5 of the hot strip collar 1. In the exemplary embodiment, the lateral surface segments are cylinder segments formed at right angles, ie the boundary lines of the segments extending in the lateral surface intersect the base surface of the cylinder at right angles. This is particularly easy to handle in practice.

Die erfasste Temperatur eines Mantelsegments 4 wird einer Steuereinrichtung 9 zugeführt. Ferner wird aus den Temperaturen der Mantelsegmente 4, insbesondere für jene, welche innerhalb eines Umlaufs des Warmbandbundes 1 erfasst wurden, eine mittlere Manteltemperatur berechnet.The detected temperature of a jacket segment 4 is fed to a control device 9. Furthermore, an average jacket temperature is calculated from the temperatures of the jacket segments 4, in particular for those which were detected within one revolution of the hot-rolled strip collar 1.

Die Steuereinrichtung 9 vergleicht nun jeweils die erfasste Temperatur eines Mantelsegments 4 mit der mittleren Temperatur der Mantelfläche 5. In Abhängigkeit von der Abweichung zwischen erfasster Temperatur des Mantelsegments 4 und der mittleren Manteltemperatur wird die Antriebsrolle 7 gesteuert.The control device 9 now compares the detected temperature of a jacket segment 4 with the mean temperature of the lateral surface 5. The drive roller 7 is controlled as a function of the deviation between the detected temperature of the jacket segment 4 and the middle jacket temperature.

Die Steuereinrichtung 9 steuert die Antriebsrolle 7 derart, dass die von der Steuereinrichtung vorgegebene Änderung der Drehgeschwindigkeit des Warmbandbundes 1 erst dann auf die Antriebsrolle 7 beaufschlagt wird, wenn das Mantelsegment 4, von welchem die Temperatur erfasst wurde und entsprechende Steuersignale daraus für die Antriebseinrichtung 7 ermittelt wurden, in Kontakt mit dem ersten körperlichen Element in Drehrichtung, d.h. in FIG 1 mit einer Lagerrolle 3, tritt.The control device 9 controls the drive roller 7 such that the predetermined by the controller change of Rotation speed of the hot strip Federal 1 is only then acted upon by the drive roller 7, when the shell segment 4, of which the temperature has been detected and corresponding control signals were determined for the drive means 7, in contact with the first physical element in the direction of rotation, ie FIG. 1 with a bearing roller 3, occurs.

Weist die Temperatur des Mantelsegments 4 eine Abweichung von der mittleren Manteltemperatur nach oben auf, so wird bei Kontakt des Mantelsegments 4 mit der ersten Lagerrolle 3 die Drehgeschwindigkeit verlangsamt, so dass die Kontaktzeit und damit die Zeit zur Übertragung von Wärme zwischen Warmbandbund und Lagerrolle 3 bzw. Antriebsrolle 7 verlängert wird.If the temperature of the jacket segment 4 is deviating from the mean jacket temperature upwards, the rotational speed is slowed when the jacket segment 4 comes into contact with the first bearing roller 3, so that the contact time and thus the time for transferring heat between the hot strip collar and the bearing roller 3 or Drive roller 7 is extended.

Ist die Temperatur des Mantelsegments 4 niedriger als die mittlere Manteltemperatur, so wird bei Kontakt dieses Mantelsegments 4 mit der ersten Lagerrolle 3 bzw. der zweiten Lagerrolle 3 bzw. der Antriebsrolle 7 die Drehgeschwindigkeit entsprechend erhöht, so dass die Kontaktzeit und damit die Zeit zum Wärmeaustausch zwischen Lagerrollen 3 bzw. Antriebsrolle 7 und Mantelsegment 4 entsprechend gering gehalten wird.If the temperature of the jacket segment 4 is lower than the average jacket temperature, the rotational speed is correspondingly increased upon contact of this jacket segment 4 with the first bearing roller 3 or the second bearing roller 3 or the drive roller 7, so that the contact time and thus the time for heat exchange between bearing rollers 3 and drive roller 7 and shell segment 4 is kept correspondingly low.

Zusätzlich kann die Steuereinrichtung 9 auf ein Modell 10 zugreifen, in welchem mittels der Wärmeleitungsgleichung vorausberechnet wird, wie sich die Temperatur der Mantelfläche 5 des Warmbandbundes 1 lokal ändert. Insbesondere wird hier berücksichtigt, in welchen Abständen die Mantelsegmente 4 bestimmte Temperaturdifferenzen aufweisen und über vorzugsweise mehrere Umdrehungen des Warmbandbundes 1 vorausberechnet, wie sich die Temperatur der Mantelsegmente mit einem bestimmten Steuerverhalten verhält und das Abkühlung des Warmbandbundes derart beeinflusst, dass möglichst homogene Eigenschaften des aufgehaspelten Warmbands 2 nach dem Abkühlen gewährleistet sind.In addition, the control device 9 can access a model 10 in which, by means of the heat conduction equation, it is predicted how the temperature of the lateral surface 5 of the hot strip collar 1 changes locally. In particular, it is taken into account here, at which intervals the shell segments 4 have specific temperature differences and predicted over preferably several revolutions of the hot strip Federal 1, how the temperature of the shell segments behaves with a specific control behavior and the cooling of the hot strip Federal influenced so that the most homogeneous properties of the coiled hot strip 2 are guaranteed after cooling.

Abhängig von der Vorausberechnung durch das Modell 10 werden der Steuereinrichtung 9 Informationen übermittelt, anhand derer die Steuereinrichtung 9 die Steuersignale der Antriebsrolle 7 einstellt.Depending on the prediction by the model 10 of the controller 9 information is transmitted, based on which the control device 9 sets the control signals of the drive roller 7.

Insbesondere kann von dem Modellmodul 10 eine durchschnittliche Drehgeschwindigkeit des Warmbandbundes 1 ermittelt werden, welche zu einem optimierten Walzverhalten im anschließenden Kaltwalzprozess führt.In particular, an average rotational speed of the hot strip bundle 1 can be determined by the model module 10, which leads to an optimized rolling behavior in the subsequent cold rolling process.

In FIG 1 weisen die Lagerrollen 3 und die Antriebsrolle 7 zusätzlich jeweils eine Kühleinrichtung 8 auf. Diese, insbesondere deren Kühlleistung, wird ebenfalls von der Steuereinrichtung 9 gesteuert. Bspw. können Kühlmedien oder Peltier-Elemente zum Einsatz kommen.In FIG. 1 The bearing rollers 3 and the drive roller 7 additionally each have a cooling device 8. This, in particular their cooling capacity, is also controlled by the control device 9. For example. Coolants or Peltier elements can be used.

Durch die Kühleinrichtung 8 können die Oberflächen der Antriebsrolle 7 bzw. der Lagerrollen 3 thermisch konditioniert werden. Das heißt, es können beispielsweise konstante Oberflächentemperaturen der Rollen 3 bzw. 7 eingestellt werden. Alternativ können beispielsweise die Oberflächen der Antriebsrolle 7 bzw. der Lagerrollen 3 stark heruntergekühlt werden, um einen großen, gewünschten Temperaturgradienten zwischen Mantelfläche 5 des Warmbandbundes 1 und der Oberflächen der Lagerrollen 3 bzw. der Antriebsrolle 7 herzustellen. Dadurch wird das Kühlen des Warmbandbundes beschleunigt. Jedoch ist zu berücksichtigen, dass die Temperaturdifferenzen zwischen den Mantelsegmenten der Mantelfläche des Warmbandbundes 1 nicht so groß werden dürfen, dass nicht mehr behebbare Inhomogenitäten im Warmband 2 entstehen. Der verwendbare maximale Temperaturgradient zwischen einem Mantelsegment 4 des Warmbandbunds 1 und einer der Rollen 3 bzw. 7 ist u.a. abhängig von der mittleren Drehgeschwindigkeit, vom Material des Warmbands 2 des Warmbandbunds 1 und der Manteltemperatur des Warmbandbunds 1.By the cooling device 8, the surfaces of the drive roller 7 and the bearing rollers 3 can be thermally conditioned. That is, for example, constant surface temperatures of the rollers 3 and 7 can be adjusted. Alternatively, for example, the surfaces of the drive roller 7 and the bearing rollers 3 can be strongly cooled down to produce a large, desired temperature gradient between the lateral surface 5 of the hot-rolled strip 1 and the surfaces of the bearing rollers 3 and the drive roller 7. This speeds up the cooling of the hot strip bundle. However, it should be noted that the temperature differences between the shell segments of the lateral surface of the hot strip Federal 1 may not be so large that no longer recoverable inhomogeneities in the hot strip 2 arise. The usable maximum temperature gradient between a shell segment 4 of the hot strip collar 1 and one of the rollers 3 and 7 is u.a. depending on the average rotational speed of the material of the hot strip 2 of the hot strip collar 1 and the jacket temperature of the hot strip collar. 1

Durch die in FIG 1 dargestellte Vorrichtung wird erreicht, dass ein Warmbandbund 1 mit vorgebbaren Zeitaufwand derart gleichmäßig gekühlt, dass das Warmbandbund eine homogene Bandeigenschaften, insbesondere einen homogenen Härte, aufweist und für einen sich anschließenden Kaltwalzprozess Probleme beim Walzen des Bandes vermieden bzw. verringert werden können.By the in FIG. 1 The apparatus shown achieves that a hot-rolled strip 1 is cooled so uniformly with a predeterminable amount of time that the hot-rolled strip has a homogeneous strip properties, in particular a homogeneous hardness and problems for rolling the strip can be avoided or reduced for a subsequent cold rolling process.

FIG 2 zeigt ein Ablaufdiagramm für einen beispielhaften Ablauf des erfindungsgemäßen Verfahrens. In einem Verfahrensschritt 100 wird der Warmbandbund in Drehung um seine Symmetrieachse gesetzt. FIG. 2 shows a flowchart for an exemplary sequence of the method according to the invention. In a method step 100, the hot-rolled strip is set in rotation about its axis of symmetry.

In einem Verfahrensschritt 101 erfolgen ständige Messungen der Temperatur von Mantelsegmenten, aus welchen nach Beendigung der ersten vollständig temperaturmesstechnisch erfassten Drehung nach Messbeginn, eine mittlere Manteltemperatur in einem Verfahrensschritt 102 ermittelt wird. Die Ermittlung der Manteltemperatur wird sukzessive auf Grundlage der neuen Temperaturwerte für die ständig erfasste Temperatur der Mantelsegmente durchgeführt.In a method step 101, continuous measurements are made of the temperature of jacket segments from which, after completion of the first completely temperature-metrically detected rotation after the beginning of the measurement, a mean jacket temperature is determined in a method step 102. The determination of the jacket temperature is carried out successively on the basis of the new temperature values for the constantly detected temperature of the jacket segments.

Ferner wird dann aus der erfassten Temperatur eines Mantelsegments ein Vergleich mit der mittleren Manteltemperatur in einem Verfahrensschritt 103 vorgenommen. Hierbei wird in der Regel eine positive oder negative Abweichung von der mittleren Manteltemperatur festgestellt.Furthermore, a comparison with the average jacket temperature in a method step 103 is then made from the detected temperature of a jacket segment. As a rule, a positive or negative deviation from the mean jacket temperature is determined.

Anschließend wird in einem Verfahrensschritt 104 abgefragt, ob eine Vorausberechnung des Abkühlvorgangs des Warmbandbundes mit Hilfe eines Abkühlmodells berechnet werden soll. Dadurch kann die Qualität des Abkühlvorgangs weiter verbessert werden.Subsequently, in a method step 104, it is queried whether a prediction of the cooling process of the hot strip bundle is to be calculated with the aid of a cooling model. As a result, the quality of the cooling process can be further improved.

Ist dies nicht gewünscht, so wird in einem Verfahrensschritt 105 geprüft, ob eine Steuerung der Kühlleistung der das Warmbandbund kühlenden, z.B. körperlichen Elemente, welche das Warmbandbund abschnittsweise kontaktieren, vorgenommen werden soll. Diese Abfrage ist nur dann zweckmäßig, wenn die Kühlleistung der Elemente einstellbar ist.If this is not desired, it is checked in a method step 105 whether a control of the cooling capacity of the hot strip waistband cooling, for example, physical elements which contact the hot-rolled strip sectionwise, should be made. This query is only useful if the cooling capacity of the elements is adjustable.

Die Kühlleistung der in ihrer Kühlleistung einstellbaren Elemente kann bspw. dann gezielt eingestellt werden, wenn das Warmbandbund innerhalb einer definierten, kurzen Zeit für das Kaltwalzen zur Verfügung stehen soll.The cooling capacity of the elements which can be adjusted in terms of their cooling capacity can be specifically adjusted, for example, if the hot-rolled strip is to be available for cold rolling within a defined, short time.

Ist eine gezielte Einstellung der Kühlleistung nicht gewünscht, so wird anhand der erfassten Temperatur des Mantelsegments und der mittleren Manteltemperatur in einem Verfahrensschritt 106 ein Steuereingriff in der Antriebseinrichtung zum Drehen des Warmbandbundes vorgenommen. Dieser ist derart ausgestaltet, dass der Steuereingriff zu einer Verringerung der Abweichung der Temperatur des Mantelsegments von der mittleren Manteltemperatur führt.If a targeted adjustment of the cooling capacity is not desired, a control intervention in the drive device for rotating the hot-rolled strip is carried out in a method step 106 on the basis of the detected temperature of the jacket segment and the middle jacket temperature. This is designed such that the control intervention leads to a reduction in the deviation of the temperature of the shroud segment from the average jacket temperature.

Insbesondere wird in diesem Fall die Antriebseinrichtung durch die Steuereinrichtung derart gesteuert, dass der Steuereingriff, d.h. die Erhöhung oder Verringerung der Kontaktzeit relativ zur mittleren Kontaktzeit des Mantelsegments mit dem körperlichen Element, erst dann wirksam wird, wenn das jeweilige Mantelsegment mit der zugehörigen erfassten Temperatur in Kontakt mit einem körperlichen Element tritt.In particular, in this case the drive means is controlled by the control means such that the control action, i. the increase or decrease in the contact time relative to the mean contact time of the sheath segment with the physical element only becomes effective when the respective sheath segment with the associated detected temperature comes into contact with a physical element.

Ist die Temperatur des erfassten Mantelsegments höher als die mittlere Manteltemperatur, so wird die Kontaktzeit zwischen diesem Mantelsegment und dem körperlichen Element erhöht. Ist die erfasste Temperatur des Mantelsegments geringer als die mittlere Manteltemperatur, so wird auch die Kontaktzeit zwischen diesem betreffenden Mantelsegment und dem körperlichen Element verringert, d.h. die Drehgeschwindigkeit erhöht, bis dieses Mantelsegment wieder den Kontakt mit dem körperlichen Element löst.If the temperature of the detected sheath segment is higher than the average sheath temperature, the contact time between this sheath segment and the physical element is increased. If the detected temperature of the sheath segment is less than the average sheath temperature, the contact time between that sheath segment concerned and the physical element is also reduced, i. increases the rotational speed until this shell segment again triggers contact with the physical element.

Für den Fall das in einem Verfahrensschritt 104 keine Vorausberechnung des zu steuernden Abkühlens erwünscht ist, kann in einem Verfahrensschritt 105 die Steuerung einer Kühlleistung eines körperlichen Elements auch bejaht werden. Anschließend erfolgt eine Berechnung und Einstellung der gewünschten Kühlleistung in einem Verfahrensschritt 108. Die Einstellung der Kühlleistung wird vorzugsweise anhand der erfassten Temperaturen der Mantelsegmente und/oder der mittleren Manteltemperatur gesteuert bzw. geregelt. Es erfolgt dann anhand der berechneten und eingestellten Kühlleistung ein Steuereingriff in einem Verfahrensschritt 109 für die Antriebseinrichtung vorgesehen, welcher die geänderte Kühlleistung der körperlichen, die Mantelfläche des Warmbandbunds wenigstens abschnittsweise kontaktierenden Elemente berücksichtigt. Die Einstellung der Kühlleistung kann insbesondere dann zum Einsatz kommen, wenn bspw. aufgrund eines technischen Defekts das homogene Abkühlen ohne einstellbare Kühlleistung nicht mehr möglich erscheint.In the event that in a method step 104 no prediction of the cooling to be controlled is desired, in a method step 105, the control of a cooling capacity of a physical element can also be affirmed. Subsequently, a calculation and adjustment of the desired cooling capacity takes place in a method step 108. The setting of the Cooling capacity is preferably controlled or regulated on the basis of the detected temperatures of the jacket segments and / or the average jacket temperature. Then, based on the calculated and set cooling power, a control intervention is provided in a method step 109 for the drive device, which takes into account the changed cooling capacity of the physical elements contacting the lateral surface of the hot-rolled strip at least in sections. The adjustment of the cooling capacity can be used in particular if, for example, due to a technical defect, homogeneous cooling without adjustable cooling capacity no longer seems possible.

Wird im Verfahrensschritt 104 entschieden, dass eine Vorausberechnung des Abkühlprozesses erfolgen soll, so ist auch hier in einem Verfahrensschritt 105 auszuwählen, ob eine Steuerung der Kühlleistung des insbesondere körperlichen Elements erfolgen soll oder nicht. Es dann erfolgt eine Vorausberechnung des Kühlprozesses in Abhängigkeit davon, ob eine bestimmte Kühlleistung des Elements eingestellt werden soll oder nicht.If it is decided in method step 104 that a precalculation of the cooling process is to take place, it is also to be selected here in a method step 105 whether a control of the cooling capacity of the particular physical element is to take place or not. It then takes a precalculation of the cooling process in dependence on whether a certain cooling capacity of the element should be set or not.

Soll die Einstellung einer Kühlleistung des wenigstens einen körperlichen Elements mit Hilfe einer Kühleinrichtung vorgenommen werden, so erfolgt ein Steuereingriff gemäß Verfahrensschritt 111 für die Antriebseinrichtung und die Kühleinrichtung dahingehend, dass einerseits Temperaturabweichungen der Mantelsegmente von der mittleren Manteltemperatur möglichst minimiert werden, dass die Eigenschaften des Warmbandbundes für einen sich anschließenden Kaltwalzprozess optimiert werden, indem noch - soweit möglich - Einfluss auf das Gefüge des Warmbandbundes genommen wird. Ferner kann der Steuereingriff in Abhängigkeit von einer Kühldauer vorgesehen werden, nach der das Warmbandbund in die Kaltwalzstrasse eingespeist werden muss, damit eine optimale Auslastung der Kaltwalzstrasse besteht. Dementsprechend wird dann auch die Kühlleistung des wenigstens einen Elements angepasst.If the setting of a cooling capacity of the at least one physical element is to be carried out with the aid of a cooling device, then a control intervention according to method step 111 for the drive device and the cooling device takes place in such a way that, on the one hand, temperature deviations of the shell segments from the middle jacket temperature are minimized to the extent that the properties of the hot strip collar be optimized for a subsequent cold rolling process by still - as far as possible - influence on the structure of the hot strip bundle is taken. Furthermore, the control intervention can be provided as a function of a cooling time, after which the hot strip bundle must be fed into the cold rolling train, so that there is an optimal utilization of the cold rolling train. Accordingly, the cooling capacity of the at least one element is then adjusted.

Für den Fall, das keine Kühlleistung der körperlichen Elemente im Verfahrensschritt 105 vorgenommen werden soll und daher beispielsweise die Dauer des Abkühlvorgangs keine wesentliche Rolle spielt, kann der Steuereingriff gemäß Verfahrensschritt 110 für die Antriebseinrichtung beispielsweise derart erfolgen, dass die Abweichung der Mantelsegmenttemperaturen von der mittleren Manteltemperatur möglichst gering wird und gleichzeitig das Warmband in seinen Eigenschaften noch derart beeinflusst wird, dass es für den nachfolgenden Kaltwalzprozess möglichst gut handhabbar ist. Die Einstellung einer Abkühlrate kann dann bspw. über die Drehgeschwindigkeit des Warmbandbundes erfolgen.In the event that no cooling performance of the physical elements is to be performed in method step 105 and therefore, for example, the duration of the cooling process does not play a significant role, the control intervention according to method step 110 for the drive device, for example, carried out such that the deviation of the shell segment temperatures of the average jacket temperature As low as possible and at the same time the hot strip is still influenced in its properties in such a way that it is as good as possible to handle for the subsequent cold rolling process. The setting of a cooling rate can then take place, for example, via the rotational speed of the hot strip bundle.

Ist ein Steuereingriff erfolgt, so wird in einem Verfahrensschritt 107 abgefragt, ob das Verfahren fortgeführt werden soll. Ist dies der Fall, so erfolgt ein neuer Vergleich für ein Mantelsegment mit der neu ermittelten mittleren Manteltemperatur. Soll das Verfahren nicht fortgesetzt werden, so endet das Verfahren nach dem letzten Steuereingriff.If a control intervention has taken place, a query is made in a method step 107 as to whether the method should be continued. If this is the case, a new comparison is made for a jacket segment with the newly determined average jacket temperature. If the process is not continued, the process ends after the last control intervention.

Durch ein derartiges Verfahren kann ein kontrolliertes gleichmäßiges Kühlen eines Warmbandbundes bereitgestellt werden, welches im Hinblick auf eine homogene Härte, eine bezüglich des Kaltwalzens optimierte Härte und gegebenenfalls im Hinblick auf eine Abkühldauer optimiert ist.By such a method, a controlled uniform cooling of a hot strip bundle can be provided, which is optimized in terms of a homogeneous hardness, a hardness optimized with respect to the cold rolling and optionally with regard to a cooling time.

Claims (14)

  1. Process for cooling a hot strip (2), which is coiled up to form a hot strip coil (1), by means of an intermediate bearing device which differs from a coiler,
    characterized in that, during the intermediate mounting, the hot strip coil (1) is mounted at least in certain portions on the outer surface (5) thereof, is rotated (100) about the axis of symmetry (S) thereof and is cooled by virtue of the fact that the outer surface (5) thereof makes contact with at least one physical element (3, 7).
  2. Process according to Claim 1,
    characterized in that the physical element (3, 7) for cooling is simultaneously used as a bearing element for mounting the hot strip coil (1).
  3. Process according to Claim 1 or 2,
    characterized in that a mean outer surface temperature of the hot strip coil (1) is determined (102), in that a temperature for a segment (4) of the outer surface (5) is detected (101), and in that, as a function of a difference between the temperature of the outer surface segment (4) and the mean outer surface temperature, a contact time between the outer surface segment (4) and the at least one element (3, 7) is set in such a manner that the difference is reduced.
  4. Process according to Claim 3,
    characterized in that a mean contact time between an outer surface segment (4) and the at least one element (3, 7) is set (100) by a predefinable rotational speed of the hot strip coil (1), wherein, in the event of a positive or negative temperature difference, the contact time is increased or lowered in relation to the mean contact time.
  5. Process according to Claim 3 or 4,
    characterized in that the temperature of the outer surface segment (4) is detected (101) in a contactless manner.
  6. Process according to one of Claims 3 to 5,
    characterized in that the mean outer surface temperature is determined (102) from a multiplicity of temperatures detected for various outer surface segments (4).
  7. Process according to one of Claims 3 to 6,
    characterized in that cooling of an outer surface segment (4) by the at least one physical element (3, 7) is precalculated with the aid of a model (10), and the contact time is set on the basis of the calculation.
  8. Process according to one of the preceding claims,
    characterized in that a cooling power of the at least one physical element (3, 7) is set (108).
  9. Apparatus for cooling a hot strip coil (1), having at least one physical element (3, 7) which cools a segment (4) of an outer surface (5) of the hot strip coil (1), having a bearing element for mounting the hot strip coil on the outer surface thereof, having a drive device (7) for rotating the hot strip coil (1) about the axis of symmetry thereof, and having a control device according to Claim 14, by means of which the drive device (7) is operatively connected.
  10. Apparatus according to Claim 9,
    characterized in that the at least one physical element (3, 7) is configured as a bearing element.
  11. Apparatus according to Claim 9 or 10,
    characterized by
    a device (6) for detecting a temperature of the at least one outer surface segment (4), wherein the control device (9) is additionally operatively connected to the temperature detection device (6).
  12. Apparatus according to one of Claims 9 to 11,
    characterized in that the drive device (7) comprises the at least one element (3, 7).
  13. Apparatus according to one of Claims 9 to 12,
    characterized by a cooling device (8) for the settable cooling of the at least one physical element (3, 7).
  14. Control and/or regulation device (9) for an apparatus for cooling a hot strip coil (1), comprising a machine-readable program code having control commands which, when said program code is executed, prompt the control device (9) to carry out the process according to one of Claims 1 to 8.
EP09793894.8A 2008-07-07 2009-05-15 Method for cooling a hot-rolled strip onto a hot-rolled strip coil, a device for cooling a hot-rolled strip coil, a control and/or regulating device Active EP2296834B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP09793894.8A EP2296834B1 (en) 2008-07-07 2009-05-15 Method for cooling a hot-rolled strip onto a hot-rolled strip coil, a device for cooling a hot-rolled strip coil, a control and/or regulating device
PL09793894T PL2296834T3 (en) 2008-07-07 2009-05-15 Method for cooling a hot-rolled strip onto a hot-rolled strip coil, a device for cooling a hot-rolled strip coil, a control and/or regulating device

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP08012248A EP2143504A1 (en) 2008-07-07 2008-07-07 Method for cooling a hot-rolled strip onto a hot-rolled strip coil, a device for cooling a hot-rolled strip coil, a control and/or regulating device and metal strip
EP09793894.8A EP2296834B1 (en) 2008-07-07 2009-05-15 Method for cooling a hot-rolled strip onto a hot-rolled strip coil, a device for cooling a hot-rolled strip coil, a control and/or regulating device
PCT/EP2009/055929 WO2010003723A1 (en) 2008-07-07 2009-05-15 Method for cooling a hot strip wound to a hot strip bundle, a device for cooling a hot strip, a control and/or regulating device, and metal strip

Publications (2)

Publication Number Publication Date
EP2296834A1 EP2296834A1 (en) 2011-03-23
EP2296834B1 true EP2296834B1 (en) 2014-01-15

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP08012248A Withdrawn EP2143504A1 (en) 2008-07-07 2008-07-07 Method for cooling a hot-rolled strip onto a hot-rolled strip coil, a device for cooling a hot-rolled strip coil, a control and/or regulating device and metal strip
EP09793894.8A Active EP2296834B1 (en) 2008-07-07 2009-05-15 Method for cooling a hot-rolled strip onto a hot-rolled strip coil, a device for cooling a hot-rolled strip coil, a control and/or regulating device

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP08012248A Withdrawn EP2143504A1 (en) 2008-07-07 2008-07-07 Method for cooling a hot-rolled strip onto a hot-rolled strip coil, a device for cooling a hot-rolled strip coil, a control and/or regulating device and metal strip

Country Status (6)

Country Link
US (1) US8635895B2 (en)
EP (2) EP2143504A1 (en)
CN (1) CN102089091B (en)
PL (1) PL2296834T3 (en)
RU (1) RU2499644C2 (en)
WO (1) WO2010003723A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103189153B (en) * 2010-11-03 2016-06-08 约翰逊控股公司 The method of rolling forming section bar and the structural member thus produced
CN105598185B (en) * 2016-01-14 2018-06-26 北京科技大学 High-strength steel asymmetry caused by a kind of coiling temperature deviation shrinks control method
EP3715003A1 (en) * 2019-03-26 2020-09-30 Primetals Technologies Austria GmbH Method for avoiding shape changes in metal coils, in particular for preventing collapse of freshly coiled warm coils

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2361222A (en) * 1941-12-26 1944-10-24 Jesse E Mcbride Conveying mechanism
DE2450548C3 (en) 1974-10-24 1978-05-03 Hoesch Werke Ag, 4600 Dortmund Cooling device for rolling stock
JPS5945018A (en) * 1982-09-08 1984-03-13 Sumitomo Metal Ind Ltd Manufacture of hot-rolled steel sheet having small amount of scale
US4869089A (en) * 1988-04-05 1989-09-26 Mitsubishi Denki Kabushiki Kaisha Coil box apparatus
RU2051976C1 (en) * 1992-06-14 1996-01-10 Чащин Валерий Васильевич Hot strip roll cooling method
RU2061062C1 (en) * 1993-04-12 1996-05-27 Акционерное общество открытого типа "Магнитогорский металлургический комбинат" Method of cooling of hot-rolled strips
DE19540978A1 (en) * 1995-11-03 1997-05-07 Schloemann Siemag Ag Production plant for the continuous or discontinuous rolling out of hot strip
RU2100449C1 (en) * 1996-02-27 1997-12-27 Акционерное общество открытого типа "Северсталь" Apparatus for cooling coiled hot rolled strips
US6331219B1 (en) 1998-10-09 2001-12-18 Morgan Construction Company Retarded cooling system with granular insulation material
JP3802707B2 (en) * 1999-05-24 2006-07-26 新日本製鐵株式会社 Continuous production equipment line for wire
DE60302777T2 (en) * 2003-06-11 2006-07-06 Usinor Method and device for cooling a moving metallic strip
RU2287019C2 (en) * 2004-12-27 2006-11-10 Открытое акционерное общество "Северсталь" (ОАО "Северсталь") Method of cooling roll of hot-rolled strip and device for realization of this method
DE102006038080B4 (en) * 2006-08-16 2011-04-14 Hans J. Kluge Plant for cooling hot rolled up metal strips

Also Published As

Publication number Publication date
US8635895B2 (en) 2014-01-28
RU2499644C2 (en) 2013-11-27
EP2143504A1 (en) 2010-01-13
WO2010003723A1 (en) 2010-01-14
CN102089091A (en) 2011-06-08
CN102089091B (en) 2014-05-07
US20110100080A1 (en) 2011-05-05
RU2011104081A (en) 2012-08-20
EP2296834A1 (en) 2011-03-23
PL2296834T3 (en) 2014-06-30

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