EP3791971A1 - Kaltwalzen eines walzguts in einer walzstrasse mit mehreren walzgerüsten - Google Patents

Kaltwalzen eines walzguts in einer walzstrasse mit mehreren walzgerüsten Download PDF

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Publication number
EP3791971A1
EP3791971A1 EP19196307.3A EP19196307A EP3791971A1 EP 3791971 A1 EP3791971 A1 EP 3791971A1 EP 19196307 A EP19196307 A EP 19196307A EP 3791971 A1 EP3791971 A1 EP 3791971A1
Authority
EP
European Patent Office
Prior art keywords
rolling
rolling stock
stock
pass
temperature
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Withdrawn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
EP19196307.3A
Other languages
German (de)
English (en)
French (fr)
Inventor
Martin Bergmann
Konrad Krimpelstaetter
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.)
Primetals Technologies Austria GmbH
Original Assignee
Primetals Technologies Austria GmbH
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
Application filed by Primetals Technologies Austria GmbH filed Critical Primetals Technologies Austria GmbH
Priority to EP19196307.3A priority Critical patent/EP3791971A1/de
Priority to EP20768550.4A priority patent/EP4028181B1/de
Priority to JP2022515752A priority patent/JP7326594B2/ja
Priority to CN202080063610.XA priority patent/CN114340809A/zh
Priority to US17/641,477 priority patent/US20220355356A1/en
Priority to PCT/EP2020/074901 priority patent/WO2021048038A1/de
Priority to KR1020227010961A priority patent/KR20220062010A/ko
Publication of EP3791971A1 publication Critical patent/EP3791971A1/de
Withdrawn legal-status Critical Current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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/28—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • 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
    • B21B37/46—Roll speed or drive motor control
    • 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
    • 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
    • B21B45/004—Heating the product
    • 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
    • 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
    • B21B45/0239—Lubricating
    • B21B45/0245—Lubricating devices
    • B21B45/0248—Lubricating devices using liquid lubricants, e.g. for sections, for tubes
    • B21B45/0251—Lubricating devices using liquid lubricants, 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236—Cold rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally
    • B21B2027/103—Lubricating, cooling or heating rolls externally cooling externally
    • 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
    • B21B2275/00—Mill drive parameters
    • B21B2275/02—Speed
    • B21B2275/06—Product speed

Definitions

  • the invention relates to the cold rolling of a rolling stock in a rolling train with a plurality of rolling stands.
  • a rolling stock In a rolling stand, a rolling stock, usually a metallic rolled strip, is rolled in a roll gap between two work rolls of the rolling stand in order to reduce the thickness of the rolling stock.
  • a number of rolling stands are arranged in a so-called rolling train, through which the rolling stock traverses one after the other in order to successively reduce the thickness of the rolling stock.
  • the rolling of the rolling stock in one of the rolling stands is referred to as a rolling pass.
  • several rolling passes are carried out one after the other.
  • the reduction in the thickness of the rolling stock during a rolling pass is referred to as the decrease in the rolling pass.
  • cold rolling the rolling stock is rolled at a rolling stock temperature below the recrystallization temperature.
  • electrical sheets with a high silicon content are becoming more and more important.
  • the high brittleness of these electrical sheets can lead to numerous difficulties, especially during cold forming, for example frequent strip tears and therefore unstable production conditions during cold rolling.
  • By increasing the rolling stock temperature of the rolling stock its brittleness can be reduced.
  • the temperature of the rolling stock during cold rolling must not exceed the recrystallization temperature of the rolling stock due to the principle involved.
  • the temperature of the rolled stock should generally also be limited for other reasons during cold rolling.
  • cold rolling is mostly used a lubricant is applied to the work rolls of the roll stands and / or to the rolling stock in order to reduce friction between the rolling stock and the work rolls.
  • the lubricant is or contains a rolling oil which can crack at high temperatures, for example above 200 ° C.
  • the cold rolling can be followed by processing steps for processing the cold-rolled stock, for example coating the rolling stock, for which an excessively high rolling stock temperature is disadvantageous (in the case of coating the rolling stock, for example, reduced adhesion of the coating).
  • a high rolling stock temperature can lead to increased wear of plant equipment, for example plastic-coated deflection rollers for the rolling stock or depositing saddles for the rolled rolling stock, or to a thermal deformation of the work roll contour in the axial direction, which impairs the flatness of the rolling stock.
  • the invention is based on the object of specifying a method and a rolling train for cold rolling a rolling stock with a plurality of rolling stands, which are improved with regard to the temperature control of the rolling stock during rolling and / or after rolling.
  • the object is achieved according to the invention by a method with the features of claim 1 and a rolling train with the features of claim 11.
  • the invention therefore provides for the rolling stock temperature to be controlled in at least one rolling pass so that it does not exceed a rolling pass-specific upper limit temperature and / or does not fall below a rolling pass-specific lower limit temperature.
  • This can generally reduce operational disruptions such as strip tears and thus the throughput of a rolling train can be increased.
  • the production conditions for cold rolling of critical rolling stock such as electrical steel sheets with a high silicon content are improved or even created in the first place.
  • a suitable specification of the Limit temperatures can furthermore be influenced in a targeted manner, the end temperature of the rolling stock at the exit of the rolling train, whereby flexible further processing of the cold-rolled rolling stock can be achieved.
  • an inlet temperature of the rolling stock required at the entrance to the rolling train can be minimized and, as a result, energy for heating the rolling stock before the first rolling pass can be saved.
  • the system equipment can be protected in order to reduce its wear and tear.
  • control or regulation measures mentioned are particularly suitable for influencing the rolling stock temperature during cold rolling. Heating the rolling stock before the first rolling pass reduces the brittleness of the rolling stock and thus the risk of strip tears in the rolling stock.
  • the cooling of work rolls and / or the rolling stock between rolling passes counteracts heating of the work rolls and the rolling stock during cold forming of the rolling stock.
  • the amount of heat dissipated from the work rolls can be determined from the modeling of the heat transfer (determination of the heat transfer coefficient between a roll surface and the roll coolant) and is off, for example F. Hell: Fundamentals of heat transfer, VDI-Verlag 1982, ISBN number 978-3-18-400529-0, pages 77-85 known . From this, the temperature of the work rolls can be determined, from which the heat flow between the rolling stock and the work rolls in the roll gap can be determined. The same applies to the cooling of the rolling stock by dispensing a rolling stock coolant onto the rolling stock.
  • a lubricant By applying a lubricant to the work rolls and / or to the rolling stock in at least one rolling pass, the friction between the rolling stock and the Reduced work rolls and thus counteracted heating of the rolling stock and / or the work rolls.
  • the latter is basically calculated from an applied rolling force, a coefficient of friction and a differential speed between the rolled strip and the work rolls in the roll gap of the respective roll stand.
  • the rolling force is usually specified by an automation system of the rolling train to achieve the desired pass reduction on the relevant stand and is therefore known.
  • the current rolling force for example in the case of thickness control, can also be continuously measured online using devices that generate the rolling force on the roll stand in question (for example hydraulic cylinders).
  • the reduction in thickness of the rolling stock to be achieved in the rolling train is distributed to the individual rolling stands by a pass schedule distribution for the pass acceptance of the individual rolling passes.
  • rolling stock is heated in every roll stand by plastic deformation of the rolling stock.
  • the resulting heat of deformation can be determined by a person skilled in the art in can easily be determined from the pass decrease on the respective roll stand as well as from the material properties of the rolling stock.
  • By means of a suitable choice of the pass acceptances which takes into account all stands of the rolling train, it can be achieved, for example, that a predetermined temperature range for the rolling stock temperature is maintained over the entire rolling train.
  • the rolling speed is understood to mean a speed at which the rolling stock passes through the rolling stands of the rolling train.
  • the rolling speed can directly influence the above-mentioned frictional power loss on the individual rolling stands, since the rolling speed also directly affects the differential speeds in the individual rolling stands.
  • the rolling speed therefore also influences the temperature of the rolling stock in the individual rolling passes.
  • an upper limit temperature in the range between 140 ° C. and 250 ° C. and / or a lower limit temperature in the range between 20 ° C. and 140 ° C. is specified for at least one rolling pass.
  • Such an upper limit temperature can in particular avoid the above-mentioned cracking of rolling oil, which is used as a lubricant or a component of a lubricant.
  • the lower limit temperature depends on the material and is therefore adapted to the rolling stock.
  • a common upper limit temperature and / or a common lower limit temperature are specified for all rolling passes. This simplifies the method according to the invention compared to an embodiment with pass-dependent limit temperatures.
  • the rolling stock is heated to an inlet temperature with a heating device, in particular with induction heating, before the first rolling pass.
  • a heating device in particular with induction heating
  • the heating of the rolling stock can easily be determined from the power of the induction heating, the efficiency and the duration of action, which results from the rolling stock speed and the overall length of the heating, as well as material properties of the rolling stock, in particular its specific heat capacity.
  • the work rolls of at least one roll stand are cooled by applying a roll coolant to the work rolls only on the outlet side.
  • the exit side of a roll stand is understood to mean that side of the roll stand on which the rolling stock leaves the roll stand.
  • the entry side of a roll stand is understood to mean that side of the roll stand on which the rolling stock enters the roll stand.
  • a lubricant is applied to the work rolls and / or to the rolling stock in at least one pass by generating a mixture of the lubricant and a carrier gas in an atomization device and applying the mixture to the work rolls and / or using lubricant nozzles the rolling stock is sprayed.
  • lubricant is, for example, off EP 2 651 577 B1 known and has the advantage over the application of a lubricating emulsion, for example, that the lubricant can be applied very specifically and sparingly.
  • a lubricant is only applied to the inlet side of the work rolls and / or to the rolling stock in the case of at least one rolling pass. This is particularly advantageous in the case of roller passes, in which coolant is only applied on the outlet side, because then no lubricant is washed off the coolant and thus lubricant is saved.
  • a parameter value is determined offline for at least one parameter of a control or regulation measure, and the parameter is set to the parameter value when the rolling train is in operation.
  • at least one parameter value determined offline is determined using a computational model of at least part of the rolling train.
  • at least a subset of the parameters for controlling or regulating the rolling stock temperature is determined in advance (in particular calculated). This can relate in particular to the pass schedule distribution, i.e. the calculation of the pass reductions for the individual rolling passes.
  • At least one measured value of the rolling stock temperature is recorded during operation of the rolling train, and at least one parameter of a control or regulation measure is set online as a function of at least one measured value.
  • at least a subset of the parameters for controlling or regulating the rolling stock temperature is set online as a function of a measured rolling stock temperature of the rolling stock. This can in particular relate to the cooling and lubrication of the work rolls and / or the rolling stock.
  • FIG 1 shows schematically an embodiment of a rolling train 1 according to the invention with five roll stands 3 to 7 for cold rolling a rolling stock 2.
  • Each roll stand 3 to 7 has two work rolls 9, 10 arranged one above the other, which are spaced from one another by a roll gap 11.
  • the work rolls 9, 10 set in rotation in a motor-driven manner and the rolling stock 3 is drawn through the roll nips 11 in a rolling direction 13 by the rotating work rolls 9, 10.
  • each roll stand 3 to 7 for each work roll 9, 10 has two back-up rolls 15 to 18, which are arranged one above the other on a side of the respective work roll 9, 10 facing away from the rolling stock 2, with a first back-up roll 15, 17 the second backup roll 16, 18 and the work roll 9, 10 contacted.
  • a rolling pass is carried out by each roll stand 3 to 7, in which the thickness of the rolling stock 2 is reduced by the so-called pass decrease of the rolling pass.
  • a heating device 19 is arranged at the entrance of the rolling train 1 and is set up to heat the rolling stock 2 before the first rolling pass, which is carried out by a first rolling stand 3.
  • the heating device 19 is designed, for example, as an induction heater with which the rolling stock 3 can be inductively heated.
  • the rolling train 1 also has a cooling system which is set up to apply a roll coolant 21 to the work rolls 9, 10 of the rolling stands 4 to 6, which carry out the second, third and fourth rolling passes, and a rolling stock coolant 23 between the second and third rolling passes, the third and fourth rolling pass and the fourth and fifth rolling pass on the rolling stock 2.
  • the cooling system comprises an upper cooling beam 25 and a lower cooling beam 27 for each of the roll stands 4 to 6. With the upper cooling beam 25, roll coolant 21 is on the outlet side of the upper work roll 9 of the respective roll stand 4 to 6 and rolling stock coolant 23 is applied to an upper surface of the rolling stock 3 outputable.
  • each cooling beam 25, 27 comprises, for example, several roll coolant nozzles with which the roll coolant 21 can be output to the respective work roll 9, 10, and / or several roll coolant nozzles with which the roll coolant 23 can be applied to the rolled material 2.
  • the roller coolant 21 is, for example, water or a cooling emulsion.
  • the rolling stock coolant 23 is likewise, for example, water or a cooling emulsion and can override the roll coolant 21.
  • a cooling emulsion consists of a cooling liquid and a lubricant, for example water as the cooling liquid and oil as the lubricant, and possibly emulsifiers.
  • the main component of the cooling emulsion is the cooling liquid, while the lubricant content of the cooling emulsion is only a few percent, for example two to three percent.
  • the amount of roll coolant 21 applied to the two work rolls 9, 10 of a roll stand 4 to 6 (in total, i.e. on both work rolls 9, 10 together) in liters per minute corresponds approximately to a motor output of the roll stand 4 to 6 in kW, with the Motor power is the power of a motor that drives the work rolls 9, 10 of the roll stand 4 to 6.
  • the rolling train 1 also has a lubrication system which is set up to dispense a lubricant 29 onto the work rolls 9, 10 of all of the rolling stands 3 to 7 on the inlet side.
  • the lubrication system has an upper lubrication bar 31 and a lower lubrication bar 33 for each roll stand 3 to 7. With the upper lubrication bar 31, lubricant 29 can be dispensed on the inlet side onto the upper work roll 9 of the respective roll stand 3 to 7. With the lower lubrication bar 33, lubricant 29 can be dispensed on the inlet side onto the lower work roll 10 of the respective roll stand 3 to 7.
  • Lubricant bars 31, 33 an atomization device in which a mixture of the lubricant 29 and a carrier gas can be generated, and several lubricant nozzles with which the mixture can be sprayed onto the respective work roll 9, 10.
  • the lubricant 29 is, for example, pure rolling oil and the carrier gas is, for example, air.
  • the lubricant 29 is a lubricant emulsion consisting of a carrier liquid and rolling oil and possibly emulsifiers, and each lubricant bar 31, 33 has lubricant nozzles with which the lubricant emulsion can be applied to the respective work roll 9, 10.
  • collecting devices 35 are arranged which are set up to collect roll coolant 21, rolling stock coolant 23 and lubricant 29 flowing off from the roll stands 3 to 7.
  • the mixture of roll coolant 21, rolling stock coolant 23 and lubricant 29 collected by the collecting devices 35 is preferably broken down into its constituent parts, which are then reused.
  • the rolling train 1 also has a plurality of measuring units 37, each of which is set up to detect a rolling stock temperature of the rolling stock 2.
  • a measuring unit 37 is arranged between the heating device 19 and the first roll stand 3, further measuring units 37 are each arranged between two adjacent roll stands 3 to 7, and a measuring unit 37 is at the end of the rolling train 1 behind the roll stand 7 that carries out the fifth rolling pass, arranged.
  • the rolling train 1 also has a controller 39 with which the heating device 19, the cooling system, that is to say the roll coolant flows, roll coolant pressures, rolling stock coolant flows and rolling stock coolant pressures output by the cooling bars 25, 27, and the lubrication system, that is to say that from the lubrication bars 31, 33 respectively output lubricant flows and lubricant pressures, each controllable or regulatable in order to control or regulate the rolling stock temperature of the rolling stock 2 in each rolling pass.
  • the heating device 19 that is to say the roll coolant flows, roll coolant pressures, rolling stock coolant flows and rolling stock coolant pressures output by the cooling bars 25, 27, and the lubrication system, that is to say that from the lubrication bars 31, 33 respectively output lubricant flows and lubricant pressures, each controllable or regulatable in order to control or regulate the rolling stock temperature of the rolling stock 2 in each rolling pass.
  • a temperature window for the rolling stock temperature between an upper limit temperature and a lower limit temperature is specified for each rolling pass, and the rolling stock temperature is controlled and / or regulated in such a way that the rolling stock temperature in each rolling pass assumes a temperature value within the temperature window specified for the rolling pass.
  • a pass schedule distribution for the pass acceptance of the individual rolling passes is created and implemented.
  • the roll stands 3 to 7, that is to say the gap heights of the roll gaps 11 of the roll stands 3 to 7, are set according to the pass schedule distribution.
  • a rolling speed at which the rolling stock 2 runs through the rolling train 1 is controlled or regulated in order to influence the rolling stock temperature in the rolling passes.
  • the rolling speed is set by the speeds of the work rolls 9, 10.
  • the parameters of the temperature control and / or regulation are an inlet temperature of the rolling stock 2 to be set with the heating device 19, the roll coolant flows, roll coolant pressures, roll coolant flows and rolling stock coolant pressures (cooling parameters) which are respectively output by the cooling bars 31, 33 Lubricant flows and lubricant pressures (lubrication parameters), the pass schedule distribution and the rolling speed.
  • These parameters are each determined offline, for example, using a computational model of at least part of the rolling train 1. For example, there is a model-based calculation of the inlet temperature of the rolling stock 2, the cooling and lubrication parameters, the pass schedule distribution and the rolling speed as a solution to an optimization problem.
  • the parameters determined in this way are each set manually or by the controller 39.
  • some or all of the parameters can be regulated online as a function of the measured values of the measuring units 37 in such a way that the rolling stock temperature in each rolling pass assumes a temperature value within the temperature window specified for the rolling pass.
  • the pass schedule distribution, the inlet temperature of the rolling stock 2 and the rolling speed are determined offline, while the cooling and lubrication parameters are regulated online as a function of the measured values of the measuring units 37.
  • FIG 2 shows a flow chart 100 of an exemplary embodiment of the method according to the invention for cold rolling a rolling stock 2 in a rolling train 1 with method steps 101 to 106.
  • a temperature window for the rolling stock temperature of the rolling stock 2 in the rolling pass is specified for each rolling pass.
  • the offline parameters are determined using a computer model of at least part of the rolling train 1, for example the pass schedule distribution, the inlet temperature of the rolling stock 2 and the rolling speed.
  • a third method step 103 the cold rolling of the rolling stock 2 in the rolling train 1 is started with the offline parameters determined in the second method step 102 and predetermined initial values of the online parameters.
  • a rolling stock temperature of the rolling stock 2 is determined for each rolling pass.
  • the rolling stock temperature is recorded for a rolling pass with at least one measuring unit 37 or the rolling stock temperature in the rolling pass is calculated, for example, as described above with a calculation of the heat flow between the rolling stock and the work rolls in the roll gap based on a model of the heat transfer and / or with a Calculation of the deformation heat that arises when the rolled stock is heated by the plastic deformation of the rolled stock.
  • a fifth method step 105 it is checked whether the rolling stock temperature in each rolling pass assumes a temperature value lying in the temperature window specified for the rolling pass. If the check shows that the rolling stock temperature in each rolling pass assumes a temperature value lying in the temperature window specified for the rolling pass, the fourth method step 104 is carried out again. Otherwise, a sixth method step 106 is carried out.
  • the value of at least one online parameter is changed in order to guide the rolling stock temperature in each rolling pass, in which the rolling stock temperature is outside the temperature window predetermined for the rolling pass, into the predetermined temperature window.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)
  • Control Of Metal Rolling (AREA)
EP19196307.3A 2019-09-10 2019-09-10 Kaltwalzen eines walzguts in einer walzstrasse mit mehreren walzgerüsten Withdrawn EP3791971A1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP19196307.3A EP3791971A1 (de) 2019-09-10 2019-09-10 Kaltwalzen eines walzguts in einer walzstrasse mit mehreren walzgerüsten
EP20768550.4A EP4028181B1 (de) 2019-09-10 2020-09-07 Kaltwalzen eines walzguts in einer walzstrasse mit mehreren walzgerüsten
JP2022515752A JP7326594B2 (ja) 2019-09-10 2020-09-07 複数の圧延機スタンドを有する圧延機トレインにおける圧延材の冷間圧延
CN202080063610.XA CN114340809A (zh) 2019-09-10 2020-09-07 在具有多个轧制机架的轧机列中对轧件进行的冷轧
US17/641,477 US20220355356A1 (en) 2019-09-10 2020-09-07 Cold rolling rolled stock in a mill train with multiple roll stands
PCT/EP2020/074901 WO2021048038A1 (de) 2019-09-10 2020-09-07 Kaltwalzen eines walzguts in einer walzstrasse mit mehreren walzgerüsten
KR1020227010961A KR20220062010A (ko) 2019-09-10 2020-09-07 다수의 압연 스탠드들을 갖는 압연 트레인에서의 압연 스톡의 냉간 압연

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19196307.3A EP3791971A1 (de) 2019-09-10 2019-09-10 Kaltwalzen eines walzguts in einer walzstrasse mit mehreren walzgerüsten

Publications (1)

Publication Number Publication Date
EP3791971A1 true EP3791971A1 (de) 2021-03-17

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Application Number Title Priority Date Filing Date
EP19196307.3A Withdrawn EP3791971A1 (de) 2019-09-10 2019-09-10 Kaltwalzen eines walzguts in einer walzstrasse mit mehreren walzgerüsten
EP20768550.4A Active EP4028181B1 (de) 2019-09-10 2020-09-07 Kaltwalzen eines walzguts in einer walzstrasse mit mehreren walzgerüsten

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TWI830575B (zh) * 2023-01-11 2024-01-21 中國鋼鐵股份有限公司 鋼材軋延的方法

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JP2022546871A (ja) 2022-11-09
KR20220062010A (ko) 2022-05-13
CN114340809A (zh) 2022-04-12
EP4028181B1 (de) 2023-09-06
US20220355356A1 (en) 2022-11-10

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