EP2361699A1 - Procédé de refroidissement d'une tôle à l'aide d'un tunnel de refroidissement, tunnel de refroidissement et dispositif de commande et/ou de réglage pour un tunnel de refroidissement - Google Patents

Procédé de refroidissement d'une tôle à l'aide d'un tunnel de refroidissement, tunnel de refroidissement et dispositif de commande et/ou de réglage pour un tunnel de refroidissement Download PDF

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Publication number
EP2361699A1
EP2361699A1 EP10154802A EP10154802A EP2361699A1 EP 2361699 A1 EP2361699 A1 EP 2361699A1 EP 10154802 A EP10154802 A EP 10154802A EP 10154802 A EP10154802 A EP 10154802A EP 2361699 A1 EP2361699 A1 EP 2361699A1
Authority
EP
European Patent Office
Prior art keywords
sheet
cooling
coolant delivery
cooling section
coolant
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.)
Withdrawn
Application number
EP10154802A
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German (de)
English (en)
Inventor
Klaus Weinzierl
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=42335294&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2361699(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to EP10154802A priority Critical patent/EP2361699A1/fr
Priority to CN201180011188.4A priority patent/CN102770221B/zh
Priority to EP11701838.2A priority patent/EP2539089B2/fr
Priority to US13/581,437 priority patent/US10220425B2/en
Priority to RU2012141025/02A priority patent/RU2562565C2/ru
Priority to PCT/EP2011/051663 priority patent/WO2011104103A2/fr
Priority to BR112012021178A priority patent/BR112012021178A2/pt
Priority to KR1020127025094A priority patent/KR101834579B1/ko
Publication of EP2361699A1 publication Critical patent/EP2361699A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B21B37/76—Cooling control on the run-out table
    • 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
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • 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
    • 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
    • B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips
    • 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
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D11/00—Process control or regulation for heat treatments
    • C21D11/005—Process control or regulation for heat treatments for cooling
    • 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
    • B21B2263/00—Shape of product
    • B21B2263/04—Flatness
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals

Definitions

  • the invention relates to a method for cooling a sheet, in particular heavy plate, by means of a cooling section, wherein the cooling section comprises a plurality of coolant delivery means for cooling a top sheet and a plurality of coolant delivery means for cooling a bottom sheet, wherein by means of cooling a predetermined target state of the sheet on a Reference point is achieved at and / or after exiting the cooling section, wherein a coolant delivery for a first and a second coolant delivery device is determined, wherein the first and the second coolant discharge means are arranged relative to the sheet opposite.
  • the invention relates to a method for cooling a sheet by means of a cooling section, wherein the cooling section comprises a plurality of coolant discharge means for cooling a sheet metal top and a plurality of coolant delivery means for cooling a sheet metal bottom, wherein by means of cooling a predetermined target state of the sheet at least and / or is reached after exiting the cooling section, wherein a coolant delivery is determined for at least one of the coolant discharge device.
  • the invention relates to a control and / or regulating device for a cooling section.
  • the invention is in the technical field of rolling mills, in particular plate rolling mills and in particular relates to the cooling of heavy plate.
  • the cooling or operation of the cooling section significantly influences the quality and properties of the sheet produced.
  • the cooling section of a plate mill is used in particular to adjust the material properties of the sheet in the desired manner.
  • Heavy plate usually has a thickness of 3 mm or more and thus complies with the definition according to EN 10029.
  • the object of the invention is to further increase the flatness of manufactured heavy plate in the production of heavy plate while high throughput of the plate mill.
  • the procedural part is achieved by a method for cooling a sheet by means of a cooling section, wherein the cooling section comprises a plurality of coolant discharge means for cooling a sheet top and a plurality of coolant discharge means for cooling a sheet bottom, wherein by means of cooling a predetermined target state of the sheet at a reference point , in particular at the latest, at and / or after leaving the cooling section, wherein a coolant delivery is determined for a first and a second coolant delivery device, wherein the the first and the second coolant delivery device are arranged opposite to the sheet opposite, wherein the determination of the coolant delivery for the first and second coolant delivery device based on a predetermined dissipated heat flow from the respective coolant delivery device facing sheet metal side, wherein for each dissipated heat flow, a temperature, in particular surface temperature, the respective sheet side is taken into account.
  • the inventor has recognized that it is not sufficient for the best possible compliance with the flatness, only to take into account the heat transfer coefficients for each top and bottom and to match these.
  • the temperature of the upper side of the sheet or underside of the sheet can be determined by means of a measurement, for example by means of a pyrometer. Alternatively, it is also possible to use calculated actual temperatures, for example known from a sheet-metal tracking calculation.
  • a device As a coolant dispensing means, a device is considered which is designed for dispensing coolant on the sheet.
  • the coolant delivery device may be a single switchable valve assembly having one or more coolant outlets. Alternatively, this may also be a plurality of individually switchable valve-outlet devices, which are jointly controlled or operated.
  • the first embodiment is preferred for the invention, since this allows a more flexible adjustment or a more flexible operation of the cooling section.
  • all the coolant delivery devices of the cooling section are each formed as individually switchable valve arrangements with associated coolant outlets.
  • a desired temperature to be reached or a desired microstructure or a desired phase composition of the sheet can be considered.
  • the final state ensures that a desired product is actually provided by the cooling path of the plate rolling mill. If the final state is not reached, the product produced is generally inferior or discard as scrap.
  • a ratio of dissipating heat flow from the top side of the sheet to the underside of the sheet is set as a function of a flatness of the sheet, in particular when it enters the cooling section.
  • control and / or regulating device for the cooling section can be operatively connected to a flatness measuring device in front of the cooling section, so that the cooling section can be controlled and / or regulated in accordance with the detected flatness, in particular such that the unevenness of one in the Cooling line incoming unplaned sheet metal are reduced and flat in the cooling section incoming sheet is maintained.
  • the ratio of the heat flow to be dissipated from the top side and the heat flow to be dissipated from the bottom side is essentially equal to one for a flat sheet, in particular a sheet entering the cooling section. That the dissipated heat per unit time on the top is equal to the heat dissipated per unit time on the bottom. Due to the possibly different temperatures and the different coolant residence time on the sheet, in particular for sheet metal top and bottom sheet, this means that for the top and bottom different amounts of coolant must be applied.
  • the ratio is set such that the unevenness of the sheet is reduced after passing through the cooling section relative to the unevenness of the sheet before passing through the cooling section with an unplaned sheet metal. Not only does this ensure that a desired product is produced by means of the cooling section, but also the quality of the product produced can be influenced with regard to flatness by means of the cooling section. It can in particular by a correspondingly adapted cooling, ie corresponding unequal distribution of the heat flow for top sheet metal and bottom sheet, flatness error of the sheet in the cooling section can still be corrected, which possibly increases the yield of the plate mill.
  • the respective heat flow can be modeled via an empirical, physical or empirical-physical model. This can be determined by the expert, for example, with the help of cooled in the past sheets.
  • the model of the heat flow is usually at least a function of the respective temperature of the sheet side, the respective temperature of the coolant, which is used for cooling, the sheet speed, and the amount of coolant. Other parameters may occur, such as the rate at which the coolant impinges on the sheet surface.
  • a coolant quantity for a coolant delivery device can then be determined in order to set a desired heat flow.
  • a desired heat flow Preferably, additionally or as a secondary condition, that during the passage of the cooling section the temperature of the top side of the sheet and / or the temperature of the underside of the sheet is always greater than or equal to a predetermined limit temperature, in particular 350 ° C.
  • a limit temperature a surface temperature of the sheet is preferably used.
  • the amount of the limit temperature is, for example, determined such that the cooling effect principle for the entire cooling section is the same. If the cooling effect principle for the sheet changes as it passes through the cooling section, the cooling becomes difficult to control.
  • this limit temperature is preferably not exceeded by either the upper side of the sheet or the underside of the sheet during the passage of the cooling section.
  • this limit temperature is preferably not exceeded by either the upper side of the sheet or the underside of the sheet during the passage of the cooling section.
  • the limit temperature can be selected from a temperature range of 420 ° C to 300 ° C.
  • this surface temperature range of the sheet occurs - depending on the respective cooling conditions in a cooling section - in particular on the top of a change in the coolant behavior in the cooling of the sheet, which is accompanied by a change of the cooling mechanism or cooling effect principle. This change leads to difficult-to-control cooling conditions, which lead to the sheet unscheduled leaking out of the cooling section.
  • the coolant delivery is determined for at least one of the coolant delivery devices, regardless of the coolant delivery of another coolant delivery device, in particular a relative to the sheet opposite coolant delivery device.
  • the determination is carried out such that the sheet, in particular without explicit calculation of the above point, substantially parallel to the top or bottom is virtually divided into a first sheet and a second sheet, the coolant delivery each separately for the first and the second Sheet is determined, with the respective determination, a heat exchange between the first sheet and the second sheet is disregarded.
  • first sheet metal and second sheet is advantageously proceeded such that in each case an individual, in particular temporal course of an energetic state of the sheet descriptive size is determined for the first sheet and the second sheet, based on which a dissipated heat flow for the respective top side of the sheet metal and the underside of the sheet is determined.
  • a variable, in particular calculated, actual temperature profile, actual enthalpy profile or a course of another suitable variable can be used as the variable describing the energetic state.
  • a time course of this is preferably given individually for a variety of defined sheet metal sections, so that the greatest possible dynamics is achieved for the cooling and the entire sheet has consistently the desired properties.
  • the temperature of the top side of the sheet and / or the temperature of the underside of the sheet are always greater than or equal to a predetermined limit temperature, in particular 350 ° C.
  • a predetermined limit temperature in particular 350 ° C.
  • the limit temperature a surface temperature of the sheet is preferably used.
  • the amount of the limit temperature is, for example, such determines that the cooling effect principle is the same for the entire cooling section. If the cooling effect principle for the sheet changes as it passes through the cooling section, the cooling becomes difficult to control. For this reason, it is provided to operate the cooling section in such a way that this limit temperature is preferably not exceeded by either the upper side of the sheet or the underside of the sheet during the passage of the cooling section. In this method, simply the predetermined boundary surface temperature is taken into account as a secondary condition in the determination of the respective heat flow.
  • the object is likewise achieved by a method for cooling a sheet by means of a cooling section, the cooling section having a plurality of coolant delivery devices for cooling a sheet metal top side and a plurality of coolant delivery devices for cooling a sheet metal bottom, wherein by means of cooling a predetermined target state of the sheet at least at and is reached after exiting the cooling section, wherein a coolant delivery is determined for at least one of the coolant delivery devices, is taken into account in the determination of the coolant delivery for at least one of the coolant delivery devices that the sheet side, which faces this coolant delivery device, in particular during the implementation of Cooling, always has a temperature greater than or equal to a predetermined limit temperature.
  • the cooling mechanism is usually determined by the behavior of the coolant on the sheet, for example formation of steam cushions in water cooling, the manner of distribution of the vapor on the sheet, etc. If it comes due to the temperature profile of the surface of the sheet to a change in the behavior of the Coolant of the sheet and thus to a change in the cooling mechanism, This leads to a poor controllability of the cooling and thus to a product that does not usually correspond to the customer's wishes. For example.
  • control and / or regulating device for a cooling section with a machine-readable program code, which comprises control commands which cause the control and / or regulating device in its execution for carrying out the method according to one of claims 1 to 10.
  • the invention further extends to a machine-readable program code for a control and / or regulating device for a cooling section, wherein the program code has control commands which cause the regulating and / or control device to carry out the method according to one of claims 1 to 10.
  • the invention extends to a storage medium with a stored thereon machine-readable program code according to claim 12.
  • a storage medium all storage media in question, on which the corresponding program code can be stored, for example.
  • the object is likewise achieved by a cooling section for cooling sheet metal, the cooling section having a plurality of coolant delivery devices for cooling a sheet metal top side and a plurality of coolant delivery device for cooling a sheet metal underside, wherein the cooling section is operatively connected to a control and / or regulating device according to claim 11 is, wherein the coolant discharge means by means of the control and / or regulating device according to claim 11 are controllable and / or controllable.
  • a cooling section is provided, by means of which the flatness of the sheet to be cooled is improved.
  • FIG. 1 shows an exemplary cooling section 1 for cooling heavy plate B. This is part of a heavy plate mill, not shown in detail.
  • the cooling line 1 comprises a plurality of coolant delivery devices 2, which are arranged both above and below the sheet B. Their coolant delivery is individually adjustable, whereby the greatest possible flexibility and dynamics of the cooling section 1 is possible.
  • each coolant delivery device 2 of the cooling section 1 is associated with a directly opposite coolant delivery device 2. If these coolant delivery devices arranged directly opposite one another are in operation, they each cool the same sheet metal section.
  • the coolant delivery device 2 arranged above the metal sheet cools an upper side O of the sheet metal section, while the coolant discharge device 2 arranged below the sheet B cools a lower side U of the sheet metal section.
  • the cooling section 1 is preceded by a flatness measuring device 3 in the direction of mass flow, by means of which a flatness of the sheet B entering the cooling section 1 can be detected.
  • the cooling section 1 are further preceded by two temperature measuring devices 4 and 5, of which the above the sheet B arranged temperature measuring device 4 detects the temperature of the top sheet metal O and arranged below the sheet B temperature measuring device 5, the temperature of the sheet bottom U.
  • the temperature be determined by sheet metal top O and / or bottom plate U before entering the cooling section 1 by means of a model.
  • the sheet B is calculated divided into a plurality of sheet metal sections and each of these sheet metal sections is followed by calculation, the actual temperature of the top sheet metal and / or the bottom sheet for a particular sheet metal section be determined at a predetermined reference point in front of the cooling section by means of sheet metal tracking calculation.
  • the temperature measuring devices 4, 5 can be omitted in whole or in part before the cooling section 1.
  • z. B. a temperature measurement on the top the temperature distribution calculated by a model on the sheet thickness based on the temperature measurement initially adapted so that measured and calculated temperature on the side of the measurement match. Then the calculated value on the opposite side, where the measurement is missing, can be taken from the model.
  • the cooling section has a temperature measuring device 6, which is arranged behind the cooling section 1 in the direction of mass flow. These temperature values detected after the cooling line 1 can be used to correct, e.g. in the context of a model adaptation, the calculation of the coolant delivery are used.
  • the coolant delivery device 2, the temperature detection devices 4, 5 and 6, and the flatness measuring device 3 is or are operatively connected to a control and / or regulating device 10.
  • a control and / or regulating device 10 By means of the control and / or regulating device 10, the operation of the cooling section 1, in particular the coolant delivery, controlled or regulated. On this control and / or regulating device 10, therefore, the corresponding calculation method for determining the coolant delivery are deposited.
  • control and / or regulating device 10 has a machine-readable program code 12.
  • the machine-readable program code 12 is stored, for example, by means of a storage medium 11, for example a CD, a DVD, a flash memory device, for example a USB stick, or other data carriers.
  • you can the machine-readable program code 12 is supplied to the control and / or regulating device 10 via a network.
  • the machine-readable program code 12 is stored on a storage medium, which is part of the control and / or regulating device 10.
  • FIG. 2 shows a flowchart according to which the coolant delivery, in particular the amount of coolant to be dispensed per unit time, for a pair of directly opposite arranged coolant discharge means is determined.
  • a method step 100 the temperature To of the upper side of the sheet metal and the temperature Tu of the underside of the sheet are determined. This can be done, for example, by means of a measurement, as in accordance with FIG. 1 Alternatively, these temperatures can be determined from the running model calculations.
  • a total heat flow is determined, which is required, the sheet from its known initial state in front of the two opposite coolant discharge devices in the desired final state behind the two opposite coolant delivery devices, e.g. to a desired initial state before the two next opposite coolant discharge devices or the cooling stop temperature. Characterized in that the temperature of the top surface of the sheet metal and the underside of the sheet is known, this can be done with increased accuracy.
  • This required total heat flow is now to be distributed among the individual coolant delivery device pairs, taking into account that a predetermined limit temperature of the top side of the sheet metal and the underside of the sheet metal must not be exceeded. It is also taken into account that the dissipated heat flow is strongly temperature-dependent. Furthermore, the flatness of the sheet before entry into the cooling section is taken into account.
  • a numerical value x, 0 ⁇ x ⁇ 1 is first determined in a method step 102, for example, depending on the flatness measured value of the sheet. This can be done, for example, by means of a table which, for a given flatness measured value, has a suitable value for x z.
  • a number a, 0 ⁇ a ⁇ 1 is calculated such that when applying the heat flows aj above instead of J above and / or aj down instead of j down at the maximum value of a, this limit temperature just barely maintained becomes. These heat flows then proceed to step 103.
  • the coolant quantities for the coolant delivery device can be determined above the metal sheet and below the metal sheet for the respective pair of coolant devices. This takes place in a method step 104.
  • the heat flow is set in such a way that the same heat flow is dissipated from the upper side of the sheet metal and the underside of the sheet, taking into account the different temperatures of the upper sheet side and the lower sheet side. Namely, since the temperature of the sheet upper side and the sheet lower side is generally different, this causes a change in the coolant amounts for the coolant discharge means arranged above the sheet and for the coolant discharge means located below the sheet compared to the coolant quantities determined according to the prior art. However, uniform cooling is only possible if the heat flow on the upper side of the sheet metal and the underside of the sheet is the same, which is achieved by a procedure according to one of the embodiments of the method according to the invention.
  • a targeted non-uniform cooling of the top sheet metal and bottom sheet be desired, eg., When the sheet enters already unplan in the cooling section. This is detected by means of the flatness measuring device. The result of the flatness measurement is thus included in the further operation of the cooling section, wherein the cooling is adjusted so that the unevenness of the sheet is counteracted.
  • Another reason for a non-uniform setting of the heat flow for the top side of the sheet metal and the underside of the sheet can also be an excessive difference in temperature between the sheet metal top and the underside of the sheet metal.
  • This can be known today with methods of cooling lead to unevenness of the sheet in the cooling section. For example. If the temperature difference between the upper side of the sheet metal and the lower side of the sheet is too great, it may no longer be possible to cool the sheet such that the surface temperature always remains above a limit temperature, but at the same time a higher heat dissipation is required to obtain a flat sheet which also has the desired target state reached.
  • the targeted unequal distribution of the heat flow between the upper side of the sheet and the underside of the sheet is suitable for reducing such temperature differences, and to produce a flat sheet.
  • a further query is required for a further coolant quantity determination for mass-flow downstream coolant delivery devices.
  • Such a query step may advantageously be provided between method step 103 and method step 104. This avoids further calculation cycles whose result is already known from the outset, namely that the amount of coolant to be dispensed in these cases is equal to zero.
  • a coolant quantity to be dispensed individually from the respective coolant dispensing device is determined, which ensures the achievement of the target state of the metal sheet while maintaining the corresponding boundary conditions.
  • FIG. 3 An alternative procedure for determining the coolant delivery is in FIG. 3 shown schematically.
  • a calculation method is used which determines the coolant delivery or quantity separately for sheet metal top side and sheet metal bottom side.
  • the sheet is computationally divided into an upper and a lower plate, with a heat exchange between this upper and lower plate is disregarded.
  • a numerical value x , 0 ⁇ x ⁇ 1 is first determined, for example, depending on the flatness measured value of the sheet. This can be done, for example, by means of a table which, for a given flatness measured value, has a suitable value for x z.
  • the sheet is virtually divided at the height x into an upper sheet and a lower sheet.
  • x means the ratio of the thickness of the lower sheet relative to the total sheet thickness. The division is made virtually at height x times sheet thickness, measured from the bottom of the sheet to the top.
  • a method step 200 the temperature of the top side of the sheet metal and the bottom side of the sheet in front of the cooling section is determined. From this and in knowledge of the temperature profile in the thickness direction of the sheet, an average temperature for the upper sheet and an average temperature for the lower sheet is determined.
  • a method step 201 for example, an average temperature profile over time for a specific sheet-metal section of the sheet is specified for the upper sheet, so that it is transferred from a known average initial temperature before cooling to an average desired final temperature.
  • the predetermined temperature profiles are generally different for the upper sheet and the lower sheet due to the different initial temperature and the different coolant behavior on the sheet metal top and sheet metal underside.
  • the final state to be achieved is usually the same for the upper and lower plates.
  • a temporal temperature curve it is also possible to specify a local temperature profile for the two metal sheets. Also conceivable is a specification of a temporal or local enthalpy curve for the upper and lower sheet, so that the sheet reaches a desired final state.
  • a respective heat flow for the upper or lower sheet is determined from the respective given course, which is required to set the desired curve for the upper sheet or the lower sheet. This is done with the usual physical equations describing the temperature evolution and the heat transfer.
  • the coolant output, in particular the coolant quantity per unit time, for the coolant delivery device arranged above the metal sheet and for the coolant discharge device arranged below the metal sheet is determined from the determined heat flows for the upper metal sheet and the lower metal sheet.
  • a corresponding adjustment of the coolant delivery devices of the cooling section takes place in the above manner, so that the desired final state of the sheet is achieved.
  • FIG. 4 shows a flowchart, which takes into account a limit temperature in a determination of a coolant delivery for a coolant delivery device.
  • the consideration of a Such a limit temperature is therefore very advantageous because - depending on the coolant used - the cooling effect depends largely on the coolant behavior.
  • the behavior of the coolant may change, for example, due to the temperature of the sheet.
  • the coolant delivery can take place taking into account a limit temperature, which may not be exceeded during cooling, at least not on the upper side of the sheet, possibly not on the underside of the sheet metal.
  • a method step 300 the temperature of the top side of the sheet metal and / or the temperature of the bottom side of the sheet are determined. This can be done model-based as described above or by means of a measurement.
  • the determination of the coolant delivery can be carried out according to any method, preferably according to one of the above-described methods. This happens according to FIG. 4 in a method step 301.
  • a surface temperature is pre-calculated, which occurs when the amount of coolant per unit time calculated according to method step 301 is applied to the surface of the sheet or sheet metal section.
  • Compliance with the limit temperature is checked in a method step 303.
  • the cooling capacity is redistributed or reduced, for example, to downstream coolant-discharging devices in a mass flow direction.
  • a coolant discharge is again determined on the basis of the redistributed or reduced cooling capacity, according to method step 301. This results in a new surface temperature, which is compared with the limit temperature. If this continues to fall, cooling capacity is redistributed or reduced until the limit temperature is maintained.
  • the temperature of the sheet is preferably included, and determines how the cooling capacity of the subsequent coolant delivery devices is set to, for example, dissipate a desired heat flow, comply with the limit temperature and to achieve the desired final state.
  • the redistribution of the cooling capacity on subsequent coolant delivery devices on the one hand ensures compliance the limit temperature, on the other hand reaching the target state of the sheet after passing through the cooling.
  • the compliance check may be successively, i. be done separately for each coolant delivery device separately, or be calculated for the entire cooling line in total.
  • a method step 305 the coolant deliveries determined in accordance with the above method are set in the cooling section.
  • this method becomes online, i. performed during the cooling of heavy plate, so that in real time the cooling process is optimized and accordingly no waste is generated by falling below the limit temperature.
  • a coolant delivery in particular quantity of coolant to be dispensed per unit of time, is preferably already determined before the sheet enters the cooling section so that the limit temperature is already taken into account and is not undershot. This is less time consuming because no control loops are required. The calculated coolant delivery is then timed in the correct time during the passage of the sheet through the cooling section.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Control Of Metal Rolling (AREA)
  • Control Of Heat Treatment Processes (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
EP10154802A 2010-02-26 2010-02-26 Procédé de refroidissement d'une tôle à l'aide d'un tunnel de refroidissement, tunnel de refroidissement et dispositif de commande et/ou de réglage pour un tunnel de refroidissement Withdrawn EP2361699A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP10154802A EP2361699A1 (fr) 2010-02-26 2010-02-26 Procédé de refroidissement d'une tôle à l'aide d'un tunnel de refroidissement, tunnel de refroidissement et dispositif de commande et/ou de réglage pour un tunnel de refroidissement
CN201180011188.4A CN102770221B (zh) 2010-02-26 2011-02-04 用于借助冷却部段冷却金属板的方法和用于冷却部段的控制和/或调节装置
EP11701838.2A EP2539089B2 (fr) 2010-02-26 2011-02-04 Procédé de refroidissement d'une tôle au moyen d'une branche de refroidissement, branche de refroidissement et dispositif de contrôle et/ou de régulation pour une branche de refroidissement
US13/581,437 US10220425B2 (en) 2010-02-26 2011-02-04 Method for cooling sheet metal by means of a cooling section, cooling section and control device for a cooling section
RU2012141025/02A RU2562565C2 (ru) 2010-02-26 2011-02-04 Способ охлаждения листового металла на участке охлаждения прокатного стана, участок охлаждения прокатного стана и устройство управления охлаждением на участке охлаждения прокатного стана
PCT/EP2011/051663 WO2011104103A2 (fr) 2010-02-26 2011-02-04 Procédé de refroidissement d'une tôle au moyen d'une branche de refroidissement, branche de refroidissement et dispositif de contrôle et/ou de régulation pour une branche de refroidissement
BR112012021178A BR112012021178A2 (pt) 2010-02-26 2011-02-04 método para resfriar chapa de metal por meio de uma seção de resfriamento, seção de resfriamento e dispositivo de controle para uma seção de resfriamento
KR1020127025094A KR101834579B1 (ko) 2010-02-26 2011-02-04 냉각 구역에 의해 판금을 냉각하는 방법, 냉각 구역, 및 냉각 구역용 개루프 제어 및 폐루프 제어 장치

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EP10154802A EP2361699A1 (fr) 2010-02-26 2010-02-26 Procédé de refroidissement d'une tôle à l'aide d'un tunnel de refroidissement, tunnel de refroidissement et dispositif de commande et/ou de réglage pour un tunnel de refroidissement

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EP11701838.2A Active EP2539089B2 (fr) 2010-02-26 2011-02-04 Procédé de refroidissement d'une tôle au moyen d'une branche de refroidissement, branche de refroidissement et dispositif de contrôle et/ou de régulation pour une branche de refroidissement

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US (1) US10220425B2 (fr)
EP (2) EP2361699A1 (fr)
KR (1) KR101834579B1 (fr)
CN (1) CN102770221B (fr)
BR (1) BR112012021178A2 (fr)
RU (1) RU2562565C2 (fr)
WO (1) WO2011104103A2 (fr)

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EP2873469A1 (fr) 2013-11-18 2015-05-20 Siemens Aktiengesellschaft Procédé de fonctionnement pour une voie de refroidissement
EP2764932A4 (fr) * 2012-12-06 2015-06-24 Nippon Steel & Sumitomo Metal Corp Procédé permettant de refroidir une tôle d'acier laminée à chaud
EP2929949A4 (fr) * 2012-12-06 2016-07-06 Nippon Steel & Sumitomo Metal Corp Dispositif permettant de refroidir une tôle d'acier laminée à chaud
WO2019101486A1 (fr) * 2017-11-21 2019-05-31 Sms Group Gmbh Barre de refroidissement et processus de refroidissement avec taux de refroidissement variable pour tôles d'acier

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US9566625B2 (en) 2011-06-07 2017-02-14 Nippon Steel & Sumitomo Metal Corporation Apparatus for cooling hot-rolled steel sheet
US9186710B2 (en) * 2011-06-07 2015-11-17 Nippon Steel & Sumitomo Metal Corporation Method for cooling hot-rolled steel sheet
US9211574B2 (en) * 2011-07-27 2015-12-15 Nippon Steel & Sumitomo Metal Corporation Method for manufacturing steel sheet
DE102012223848A1 (de) * 2012-12-19 2014-06-26 Sms Siemag Ag Vorrichtung und Verfahren zum Kühlen von Walzgut
DE102015112293A1 (de) * 2015-07-28 2017-02-02 Hydro Aluminium Rolled Products Gmbh Verfahren und Vorrichtung zur planheitsadaptiven Temperaturänderung von Metallbändern
JP6829721B2 (ja) 2015-12-23 2021-02-10 ポスコＰｏｓｃｏ 矯正システム及び矯正方法
JP6597338B2 (ja) * 2016-01-21 2019-10-30 日本製鉄株式会社 冷却方法及び鋼板の製造方法
UA125408C2 (uk) 2017-06-26 2022-03-02 Арселорміттал Спосіб і електронний пристрій для визначення температури металевої штаби, відповідний спосіб керування, керуючий пристрій і установка гарячого вальцювання
JP6756312B2 (ja) * 2017-07-24 2020-09-16 Ｊｆｅスチール株式会社 厚鋼板の製造方法
US11167331B2 (en) * 2017-08-04 2021-11-09 Toshiba Mitsubishi-Electric Industrial Systems Corporation Temperature control device for endless rolling line
ES3002688T3 (en) * 2018-06-13 2025-03-07 Novelis Inc Systems and methods for quenching a metal strip after rolling
EP3599037A1 (fr) * 2018-07-25 2020-01-29 Primetals Technologies Germany GmbH Section de refroidissement à réglage de flux de liquide de refroidissement à l'aide des pompes
EP4101553B1 (fr) * 2021-06-07 2024-01-31 Primetals Technologies Austria GmbH Refroidissement d'un produit laminé en amont d'un train finisseur d'un laminoir à chaud
WO2024133293A1 (fr) * 2022-12-22 2024-06-27 Fives Stein Methode et dispositif de refroidissement rapide d'une bande metallique, ligne continue de production de bandes métalliques

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EP2764932A4 (fr) * 2012-12-06 2015-06-24 Nippon Steel & Sumitomo Metal Corp Procédé permettant de refroidir une tôle d'acier laminée à chaud
EP2929949A4 (fr) * 2012-12-06 2016-07-06 Nippon Steel & Sumitomo Metal Corp Dispositif permettant de refroidir une tôle d'acier laminée à chaud
EP2873469A1 (fr) 2013-11-18 2015-05-20 Siemens Aktiengesellschaft Procédé de fonctionnement pour une voie de refroidissement
WO2015071200A1 (fr) 2013-11-18 2015-05-21 Siemens Aktiengesellschaft Procédé pour faire fonctionner une section de refroidissement
WO2019101486A1 (fr) * 2017-11-21 2019-05-31 Sms Group Gmbh Barre de refroidissement et processus de refroidissement avec taux de refroidissement variable pour tôles d'acier
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EP2539089B2 (fr) 2022-05-04
CN102770221A (zh) 2012-11-07
BR112012021178A2 (pt) 2016-05-17
WO2011104103A3 (fr) 2012-01-19
RU2012141025A (ru) 2014-04-10
US10220425B2 (en) 2019-03-05
EP2539089B1 (fr) 2014-06-25
KR101834579B1 (ko) 2018-03-05
KR20120139754A (ko) 2012-12-27
CN102770221B (zh) 2015-05-20
WO2011104103A2 (fr) 2011-09-01
EP2539089A2 (fr) 2013-01-02
RU2562565C2 (ru) 2015-09-10
US20120318478A1 (en) 2012-12-20

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