EP4501480A1 - Procédé et système pour l'application d'un lubrifiant lors du laminage à froid d'un produit à laminer dans une cage de laminoir - Google Patents

Procédé et système pour l'application d'un lubrifiant lors du laminage à froid d'un produit à laminer dans une cage de laminoir Download PDF

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Publication number
EP4501480A1
EP4501480A1 EP23189548.3A EP23189548A EP4501480A1 EP 4501480 A1 EP4501480 A1 EP 4501480A1 EP 23189548 A EP23189548 A EP 23189548A EP 4501480 A1 EP4501480 A1 EP 4501480A1
Authority
EP
European Patent Office
Prior art keywords
rolling
lubricant
onto
dispensed
work roll
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Withdrawn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
EP23189548.3A
Other languages
German (de)
English (en)
Inventor
Martin Bergmann
Bernhard Danielczyk
Gernot Dirisamer
Konrad Krimpelstaetter
Bernhard Schinagl
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 EP23189548.3A priority Critical patent/EP4501480A1/fr
Priority to PCT/EP2024/066246 priority patent/WO2025026608A1/fr
Publication of EP4501480A1 publication Critical patent/EP4501480A1/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • 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
    • B21B1/30—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 non-continuous process
    • B21B1/32—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 non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
    • B21B1/36—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 non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by cold-rolling
    • 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
    • B21B2001/221—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 by 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
    • 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

Definitions

  • the invention relates to a method and a system for applying a lubricant during cold rolling of a metallic rolling stock in a rolling stand.
  • the rolling stock is passed through a roll gap between two work rolls of the rolling stand at a temperature below its recrystallization temperature, whereby its thickness is reduced.
  • the rolling stand is either a so-called tandem rolling stand or a so-called reversing rolling stand.
  • the rolling stock is only passed through a tandem rolling stand once in one rolling direction.
  • a tandem rolling stand is part of a so-called tandem train with several tandem rolling stands arranged one behind the other, through which the rolling stock is passed, whereby the thickness of the rolling stock is successively reduced.
  • the rolling speed i.e. the speed of the rolling stock, increases along the tandem train.
  • the rolling stock is passed through a reversing rolling stand several times in so-called rolling passes, whereby the rolling stock is passed through the reversing rolling stand in successive rolling passes in opposite rolling directions.
  • the side of a rolling mill on which the rolling stock is fed into the roll gap is called the entry side of the rolling mill.
  • the side of a rolling mill on which the rolling stock exits the roll gap is called the exit side of the rolling mill.
  • the exit side of one rolling pass is therefore the entry side of the following rolling pass and vice versa.
  • the roll gap of a rolling stand is lubricated.
  • Lubrication reduces the energy required for rolling, increases the service life of the work rolls and improves the surface quality of the rolled material.
  • EP 2 651 577 B1 discloses a method and a device for applying a lubricant when rolling metal rolling stock, in particular a rolled strip guided through a roll gap between two work rolls.
  • a mixture of lubricant and a carrier gas is produced in an atomization device.
  • the mixture is fed to individual spray nozzles in an arrangement of spray nozzles in order to produce a continuous overall spray jet in the direction of the width of the rolled strip.
  • the mixture is applied to the surface of at least one of the work rolls and/or to the surface of the rolled strip by means of the overall spray jet.
  • WO 2020/221654 A1 discloses a method and a rolling device for rolling a rolling stock.
  • the rolling stock is alternately guided in two opposing rolling directions through a roll gap between two work rolls of a reversing rolling stand.
  • a lubricant is introduced into a contact zone in which the rolling stock rests against the work rolls to lubricate the contact zone and a coolant is applied to the rolling stock and/or the work rolls.
  • the lubricant is sprayed in a mixture with a carrier gas onto the work rolls and/or the rolling stock exclusively on an outlet side of a rolling pass.
  • the coolant is dispensed onto the work rolls and/or the rolling stock exclusively on an inlet side of a rolling pass.
  • WO 2019/068382 A1 discloses a rolling device for rolling a rolling stock and a method for operating the rolling device.
  • the rolling device has two rolling stands, each of which has two work rolls spaced apart by a roll gap.
  • a lubricating mixture of a carrier gas and a lubricant and coolant is applied to at least one Working roll of a first rolling stand and/or at least one rolling surface of the rolling stock.
  • a skin-pass agent is applied to at least one working roll of the first rolling stand, at least one working roll of the second rolling stand and/or at least one rolling surface of the rolling stock.
  • the invention is based on the object of enabling a uniform application of a lubricant during cold rolling of a metallic rolling stock in a rolling stand, whereby the amount of lubricant applied per unit area to the surface to be lubricated can be kept constant even with changing rolling strip speeds, without the formation of an undesirable spray mist of fine lubricant droplets.
  • the amount of lubricant is regulated as a function of the current rolling speed in such a way that the amount of lubricant emitted by the single-component nozzle per unit area onto a surface of the rolling stock or onto a surface of a work roll at rolling speeds within a predeterminable speed interval is essentially independent of the current rolling speed.
  • a lubricant is dispensed onto the rolling stock and/or at least one work roll of a rolling stand using single-component nozzles.
  • the lubricant is not mixed with another liquid or a carrier gas, i.e. the single-component nozzles dispense a pure lubricant instead of, for example, an emulsion of lubricant and another liquid or a mixture of lubricant and a carrier gas.
  • the amount of lubricant used for lubrication can be reduced and precisely dosed compared to lubrication using an emulsion, and compared to applying the lubricant with a carrier gas, the costs for generating the pressure required to atomize the lubricant in the carrier gas are eliminated.
  • the lubricant is dispensed from the single-component nozzles according to the invention at a relatively low pressure in the range from 2 bar to 10 bar, preferably in the range from 2 bar to 4 bar.
  • This advantageously avoids a spray mist that would arise when the lubricant is dispensed under high pressure through the single-component nozzles and would have to be specially extracted from the rolling mill. If the medium supplied to the single-component nozzles were subjected to a high pressure (of up to several hundred bar, for example), this would disadvantageously promote the formation of a fine spray mist on the rolling mill.
  • a spray fan is created near the nozzle opening of a single-component nozzle, which creates a liquid curtain. which breaks down into larger lubricant droplets with increasing distance.
  • These larger lubricant droplets have the advantage - in contrast to the smaller lubricant droplets in two-fluid nozzles or in flat jet nozzles that are operated at high pressure - that they do not tend to form mist, so that the corresponding extraction of spray mist is not necessary.
  • the amount of lubricant dispensed by each single-component nozzle is regulated according to the invention as a function of the current rolling speed in such a way that the amount of lubricant dispensed by the single-component nozzle per unit area onto a surface of the rolling stock or onto a surface of a work roll is essentially independent of the current rolling speed at rolling speeds within a predeterminable speed interval.
  • a rolling oil is dispensed as a lubricant from the single-substance nozzles.
  • a standard rolling oil is used as the lubricant, which has a viscosity of approximately 60 mPa ⁇ s at a temperature of 40°C.
  • a lubricant quantity in the range of 0.8 g/m 2 to 2.4 g/m 2 is dispensed using the single-material nozzles on at least one side of the rolling stand either onto a surface of the rolling stock or onto a surface of a work roll.
  • the amount of lubricant used is therefore significantly lower than, for example, with conventional lubrication using an emulsion of lubricant and another liquid.
  • all single-component nozzles with which the lubricant is dispensed on the same side of the rolling stand either onto one or more surfaces of the rolling stock or onto a surface of a work roll are supplied with the lubricant by means of a single frequency-controlled pump with which a quantity of lubricant in the range of 0.5 l/min to 6 l/min is delivered depending on the current rolling speed when the temperature of the lubricant is 30°C.
  • the use of a frequency-controlled pump to supply several single-component nozzles with the lubricant enables precise control of the quantity of lubricant dispensed by the single-component nozzles by means of the speed of the pump.
  • an emulsion is dispensed onto at least one surface of a work roll on at least one side of the roll stand, the emulsion consisting of the lubricant and another liquid or of another lubricant and another liquid.
  • the emulsion is not dispensed onto the surface of the work roll on that side of the roll stand on which the lubricant is dispensed onto the surface of a work roll using the single-substance nozzles.
  • the emulsion supports the lubrication of the roll gap by the lubricant in the emulsion.
  • the emulsion primarily serves to cool the work rolls and the rolling stock using the additional liquid in the emulsion.
  • the proportion of lubricant in the emulsion is, for example, 2 to 20 percent by volume.
  • the emulsion and the pure lubricant are preferably not dispensed onto a work roll on the same side of the roll stand, since otherwise the pure lubricant would be partially washed off the work roll by the emulsion.
  • the same lubricant is used for the emulsion as is also dispensed in pure form by the single-substance nozzles.
  • the used emulsion and the used pure lubricant can be collected together under the rolling stand, cleaned, pumped back into the emulsion tank and reused as emulsion. This may gradually increase the concentration of the emulsion used a little, but this can easily be compensated for if necessary.
  • the rolling stand is a reversing rolling stand and the lubricant is dispensed with the single-fluid nozzles only on the outlet side of the rolling stand and only either onto at least one surface of the rolling stock or onto at least one surface of a work roll.
  • the rolling stand is a reversing rolling stand and the lubricant is dispensed with the single-fluid nozzles only on the inlet side of the rolling stand, wherein the lubricant is dispensed onto both surfaces of the rolling stock in a first rolling pass and onto only one surface of the rolling stock in each subsequent rolling pass.
  • the lubricant on the inlet side of the rolling stand with the single-fluid nozzles is only dispensed either onto at least one surface of the rolling stock or onto at least one surface of a work roll.
  • the lubricant is dispensed on the outlet side of the rolling stand with the single-fluid nozzles only either onto at least one surface of the rolling stock or onto at least one surface of a work roll.
  • the aforementioned embodiments of the invention take into account that, in order to lubricate the roll gap on one side of the rolling mill, it is usually sufficient to apply lubricant either to the rolling stock or to the work rolls.
  • the rolling stock In the case of a reversing rolling mill, the rolling stock is repeatedly wound up between the individual rolling passes. As a result, the lubricant acts on the rolling stock for a longer period of time and therefore adheres better to the rolling stock than in the case of a tandem rolling mill.
  • the applied lubricant is automatically distributed between adjacent windings of the rolling stock.
  • the rolling stock only needs to be lubricated on both sides on the inlet side of the rolling mill before the first rolling pass, since the rolling stock introduced into the rolling mill is still dry. For the subsequent rolling passes, however, lubrication of the rolling stock on one side is sufficient.
  • the amount of lubricant dispensed by each single-component nozzle is controlled as a function of the instantaneous rolling speed such that the amount of lubricant dispensed by the single-component nozzle per unit area onto a surface of the rolling stock or onto a surface of a work roll is essentially independent of the instantaneous rolling speed at rolling speeds within the speed interval and at changes in the rolling speed of up to 1 m/s 2 .
  • a speed of at least 600 m/min is specified as the lower limit of the speed interval and/or a speed of at most 1500 m/min is specified as the upper limit of the speed interval.
  • each lubrication bar has a distance from the rolling stock or a work roll in the range of 0.2 m to 0.5 m.
  • a further embodiment of the system according to the invention comprises a heating device for heating the lubricant, which can be controlled or regulated by the control unit in such a way that the lubricant can be heated to a predeterminable operating temperature before being fed to the lubricating bars.
  • a system according to the invention for applying a lubricant enables the method according to the invention to be carried out. Therefore, the advantages of such a system correspond to the above-mentioned advantages of the method according to the invention.
  • FIG 1 shows a rolling stand 1 for cold rolling a rolled stock 2.
  • the rolled stock 2 is a metallic rolled strip whose thickness is reduced by cold rolling.
  • the rolling stand 1 comprises a first work roll 3, a second work roll 4, a first backup roll 5 and a second backup roll 6.
  • the work rolls 3, 4 are spaced apart from one another by a roll gap 7 through which the rolled stock 2 is guided in a rolling direction 8.
  • the first work roll 3 is arranged above the second work roll 4.
  • the first backup roll 5 is arranged above the first work roll 3 and rests on the first work roll 3.
  • the second backup roll 6 is arranged below the second work roll 4 and rests on the second work roll 4.
  • the rolled stock 2 has a first surface 2.1 which rests on the first work roll 3 in the roll gap 7 and a second surface 2.2 which rests on the second work roll 4 in the roll gap 7.
  • the rolling stand 1 comprises emulsion beams 9 for applying an emulsion 10 to the working rolls 3 and a System 20 for applying a lubricant 11 to the rolling stock 2 and/or to the work rolls 3, 4 according to an embodiment of the invention.
  • the lubricant 11 is a pure rolling oil which, for example, has a viscosity of approximately 60 mPa ⁇ s at a temperature of 40°C.
  • the emulsion 10 consists of water and the lubricant 11, the proportion of the lubricant 11 in the emulsion 10 being in the range of 2 to 20 percent by volume.
  • FIG 2 shows a block diagram of the system 20.
  • the system 20 comprises lubrication bars 21, each with five single-fluid nozzles 23, a control unit 25, pumps 27 frequency-controlled by the control unit 25 and a flow measuring unit 29 for each pump 27.
  • the rolling stand 1 is a tandem rolling stand or a reversing rolling stand. If the rolling stand 1 is a reversing rolling stand, four lubrication beams 21 and two emulsion beams 9 are arranged on each side of the rolling stand 1. For each work roll 3, 4, exactly one lubrication beam 21 is arranged on each side of the rolling stand 1, the single-component nozzles 23 of which are designed to dispense the lubricant 11 onto the surface of the work roll 3, 4. Furthermore, for each surface 2.1, 2.2 of the rolling stock 2, exactly one lubrication beam 21 is arranged on each side of the rolling stand 1, the single-component nozzles 23 of which are designed to dispense the lubricant 11 onto the surface 2.1, 2.2 of the rolling stock 2.
  • Each emulsion beam 9 has nozzles that are designed to dispense the emulsion 10.
  • nozzles that are designed to dispense the emulsion 10.
  • the rolling stand 1 is a tandem rolling stand
  • the omitted lubrication bars 21, the omitted pump 27 and the omitted flow measuring unit 29 are in the Figures 1 and 2 each surrounded by a dashed frame 30.
  • Each single-component nozzle 23 is designed as a flat jet nozzle, i.e. the lubricant jet emitted by a single-component nozzle 23 is essentially concentrated on one plane or has only a small extent perpendicular to the plane.
  • the single-component nozzles 23 of each lubricating beam 11 are arranged equidistantly with respect to a line parallel to the axis A of a work roll 3, 4, about which the work roll 3, 4 rotates during operation of the rolling stand 1.
  • each flat jet nozzle 23 has a diameter of approximately 0.3 mm at the narrowest point and the cross section of the nozzle opening at the nozzle outlet of each single-component nozzle 23 is designed, for example, such that the flow rate of lubricant 11 emitted through the nozzle opening corresponds to the flow rate of a nozzle which has a circular nozzle opening with a diameter of 0.6 mm and is otherwise designed like the single-component nozzle 23.
  • Figure 3 (FIG 3 ) and Figure 4 (FIG 4 ) show schematically the geometric arrangement of the single-component nozzles 23 of a lubricating beam 21 and the jet profiles of the lubricant jets emitted by the single-component nozzles 23 using the example of the lubricating beam 21 which is arranged on the inlet side of the rolling stand 1 and whose single-component nozzles 23 emit the lubricant 11 onto the surface of the first work roll 3.
  • Figure 3 shows the single-fluid nozzles 23 and their jet profiles in a plane which is perpendicular to the z-axis of a Cartesian coordinate system with coordinates x, y, z, wherein the x-direction corresponds to the rolling direction 8 and the y-direction runs parallel to the axis A of the work roll 3.
  • Figure 4 shows the single-fluid nozzles 23 and their jet profiles in a plane perpendicular to the x-axis of this coordinate system.
  • the x-direction of the coordinate system is the main output direction of the lubricant 11 through the single-fluid nozzles 23.
  • Each single-component nozzle 23 emits the lubricant 11 as a flat jet 31 which is essentially concentrated in a plane whose plane normal has a small non-vanishing angle ⁇ with the z-direction in the yz-plane and which has an opening angle ⁇ .
  • the angle ⁇ advantageously prevents two flat jets 31 from simultaneously hitting the same area of the surface of the work roll 3 and influencing each other.
  • the distance c between two adjacent single-component nozzles 23 and the distance a of the single-component nozzles 23 from the surface of the work roll 3 are selected such that an extension b of each flat jet 31 in the y-direction when the flat jet 31 hits the surface of the work roll 3 is approximately twice as large as the distance c. This advantageously ensures that the flat jets 31 apply the lubricant 11 evenly distributed over the surface of the work roll 3, because a flat jet 31 generally has a higher density of the lubricant 11 in its central region than in its edge regions.
  • the distance c between two adjacent single-component nozzles 23 is, for example, approximately 320 mm.
  • the distance a of the single-component nozzles 23 from the surface of the work roll 3 is, for example, in the range from 200 mm to 500 mm and is preferably 325 mm.
  • the angle ⁇ is, for example, in the range from 2 degrees to 5 degrees.
  • the opening angle ⁇ is, for example, in the range from 60 degrees to 120 degrees.
  • Each pump 27 is designed to supply the lubricant 11 to exactly two lubricating beams 21, wherein these two lubricating beams 21 are designed to dispense the lubricant 11 on the same side of the rolling stand 1 either onto the surface of a work roll 3, 4 or onto a surface 2.1, 2.2 of the rolling stock 2. Furthermore, each pump 27 has a speed range of, for example, 200 rpm to 2300 rpm and a power requirement of up to approximately 1 kW and is designed to deliver a lubricant quantity of 0.5 l/min to 6 l/min when the temperature of the lubricant is 11 30°C.
  • Each flow measuring unit 29 is designed to measure a quantity of lubricant delivered by the pump 27 assigned to it per unit of time.
  • the pumps 27 are designed to pump the lubricant 11 from a lubricant reservoir 13.
  • a heating device 15 is designed to heat the lubricant 11 in the lubricant reservoir 13 to a predeterminable operating temperature, which is, for example, at least 30°C.
  • the control unit 25 is set up to control the respectively active pumps 27 in such a way that the single-component nozzles 23 of these pumps 27 each dispense a quantity of lubricant 11 in the range from 200 ml/min to 500 ml/min, and thus an active lubricating bar 21 dispenses a quantity of lubricant in the range from 1 l/min to 2.5 l/min, at a pressure in the range from 2 bar to 10 bar depending on the current rolling speed, so that the quantity of lubricant dispensed per unit area by the single-component nozzle 23 onto a surface 2.1, 2.2 of the rolling stock 2 or a work roll 3, 4 at rolling speeds within a predefinable speed interval is essentially independent of the current rolling speed.
  • a speed of at least 600 m/min is specified as the lower limit of the speed interval and a speed of at most 1500 m/min is specified as the upper limit of the speed interval.
  • control unit 25 is designed to regulate the amount of lubricant emitted by each single-component nozzle 23 as a function of the current rolling speed in such a way that the lubricant emitted by the single-component nozzle 23 per unit area onto a surface 2.1, 2.2 of the rolling stock 2 or onto the
  • the amount of lubricant dispensed onto the surface of a work roll 3, 4 at rolling speeds within the speed interval and at changes in rolling speeds up to 1 m/s 2 is essentially independent of the instantaneous rolling speed.
  • control unit 25 is configured to control or regulate the heating device 15 such that the lubricant 11 in the lubricant reservoir 13 is heated to the operating temperature.
  • the outlet-side lubrication bar 21 for the first surface 2.1 of the rolling stock 2 is preferably only activated when a device (for example a blower, a scraper or a squeeze roller) is present for removing emulsion 10 remaining on this surface 2.1.
  • a device for example a blower, a scraper or a squeeze roller
  • Variant A can be modified such that instead of the inlet-side lubrication bars 21 for both surfaces 2.1 and 2.2, only the inlet-side lubrication bar 21 is active for one of the two surfaces 2.1 or 2.2, and/or that only the outlet-side lubrication bar 21 is optionally active for one of the two surfaces 2.1 or 2.2, while the outlet-side lubrication bar 21 for the other of the two surfaces 2.1 or 2.2 is inactive.
  • Variant B) can be modified such that instead of the lubrication bars 21 for both work rolls 3, 4, only the lubrication bar 21 for one work roll 3 or 4 is active, and/or that only the outlet-side lubrication bar 21 for one of the two surfaces 2.1 or 2.2 is optionally active, while the outlet-side lubrication bar 21 for the other of the two surfaces 2.1 or 2.2 is inactive.
  • variants A), C) and D) for a reversing rolling stand can also be modified in such a way that only lubrication bars 21 are active for a surface 2.1 or 2.2 of the rolling stock 2 and/or the surface of a work roll 3 or 4.
  • one-sided lubrication of the rolling stock 2 is sufficient, because when the rolling stock 2 is wound up, the applied lubricant 11 is automatically distributed between adjacent windings of the rolling stock 2.
  • the rolling stock 2 is 80% to 90% shorter before the first rolling pass than after the rolling process, so that less lubricant 11 is required for lubricating the rolling stock 2 on both sides before the first rolling pass than would be required for lubricating the rolling stock 2 on both sides in later rolling passes.
  • a lubricating bar 21 can have a different number (different from five) of single-component nozzles 23. Furthermore, a lubricating bar 21 can be omitted, which is never activated during operation of the rolling stand 1 according to one of the variants A) to E) described above or their modifications. The same applies to the emulsion bars 9.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
EP23189548.3A 2023-08-03 2023-08-03 Procédé et système pour l'application d'un lubrifiant lors du laminage à froid d'un produit à laminer dans une cage de laminoir Withdrawn EP4501480A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP23189548.3A EP4501480A1 (fr) 2023-08-03 2023-08-03 Procédé et système pour l'application d'un lubrifiant lors du laminage à froid d'un produit à laminer dans une cage de laminoir
PCT/EP2024/066246 WO2025026608A1 (fr) 2023-08-03 2024-06-12 Procédé et système d'application d'un lubrifiant pendant le laminage à froid d'un produit de laminage sur un support de laminage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP23189548.3A EP4501480A1 (fr) 2023-08-03 2023-08-03 Procédé et système pour l'application d'un lubrifiant lors du laminage à froid d'un produit à laminer dans une cage de laminoir

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EP4501480A1 true EP4501480A1 (fr) 2025-02-05

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EP23189548.3A Withdrawn EP4501480A1 (fr) 2023-08-03 2023-08-03 Procédé et système pour l'application d'un lubrifiant lors du laminage à froid d'un produit à laminer dans une cage de laminoir

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EP (1) EP4501480A1 (fr)
WO (1) WO2025026608A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003094104A (ja) * 2001-09-21 2003-04-02 Nippon Steel Corp 熱間圧延における潤滑供給方法
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WO2019068382A1 (fr) 2017-10-02 2019-04-11 Primetals Technologies Austria GmbH Laminage d'un produit laminé
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JP2003094104A (ja) * 2001-09-21 2003-04-02 Nippon Steel Corp 熱間圧延における潤滑供給方法
EP2651577B1 (fr) 2010-12-16 2015-01-28 Siemens VAI Metals Technologies GmbH Procédé et dispositif pour répandre un lubrifiant lors du laminage d'un produit laminé métallique
US20190151919A1 (en) * 2016-04-29 2019-05-23 Primetals Technologies Austria GmbH Method for rolling a product to be rolled
US20200230673A1 (en) * 2017-02-28 2020-07-23 Jfe Steel Corporation Cold rolling mill and cold rolling method
WO2019068382A1 (fr) 2017-10-02 2019-04-11 Primetals Technologies Austria GmbH Laminage d'un produit laminé
WO2020221654A1 (fr) 2019-04-30 2020-11-05 Primetals Technologies Austria GmbH Laminage d'un produit laminé
DE102023104550A1 (de) * 2023-02-24 2023-04-27 Primetals Technologies Austria GmbH Vorrichtung und Verfahren zum Schmieren einer Arbeitswalze eines Warmwalzgerüsts

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