EP2969278B1 - Procédés de fabrication et appareil pour la lubrification ciblée dans le laminage de métal à chaud - Google Patents

Procédés de fabrication et appareil pour la lubrification ciblée dans le laminage de métal à chaud Download PDF

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Publication number
EP2969278B1
EP2969278B1 EP14720800.3A EP14720800A EP2969278B1 EP 2969278 B1 EP2969278 B1 EP 2969278B1 EP 14720800 A EP14720800 A EP 14720800A EP 2969278 B1 EP2969278 B1 EP 2969278B1
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EP
European Patent Office
Prior art keywords
nozzles
lubricant
lubrication
bite
lubricating
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Revoked
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EP14720800.3A
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German (de)
English (en)
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EP2969278A1 (fr
Inventor
Krzysztof Ryszard Januszkiewicz
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Novelis Inc Canada
Novelis Inc
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Novelis Inc Canada
Novelis Inc
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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
    • 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
    • B21B45/0203—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
    • B21B45/0233—Spray nozzles, Nozzle headers; Spray systems
    • 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
    • B21B2003/001—Aluminium or its alloys
    • 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
    • B21B45/0239—Lubricating
    • B21B45/0242—Lubricants

Definitions

  • the present invention relates to a sheet metal rolling apparatus and to a method of sheet rolling.
  • the invention provides manufacturing methods and apparatus having enhanced lubrication for improving the surface quality of rolled sheet metal, such as hot rolled aluminum.
  • EP 1 193 004 A1 discloses a sheet metal rolling apparatus according to the preamble portion of claim 1 and a method of sheet rolling comprising: rolling a sheet of metal between a pair of rolls of a metal rolling apparatus; and lubricating an interface between the metal rolled and each roll of the pair of rolls with a lubrication fluid during rolling, the lubrication fluid comprising a mixture of a cooling fluid and a juice lubricant.
  • the invention is particularly useful in hot rolling of aluminum in a rolling mill having multiple stands of rollers.
  • the object is achieved by an apparatus according to claim 1 and by a method according to claim 14.
  • the invention provides delivery of a lubricant, often a poorly-emulsified lubricant, to one or more lubrication nozzles for discharge to the rollers, preferably directed toward the roll nip or bite (e.g. bite nozzles).
  • the poorly-emulsified lubricant is delivered only to specific mill stands, rolls or headers.
  • the poorly-emulsified lubricant may be delivered to different mill roll stacks, rolls, or headers in different amounts or compositions. This targeted lubrication allows for improved control of lubrication (e.g. increased or decreased friction) at specific mill stands as needed.
  • the delivery rate of an additional lubricant or lubricant component should be such that it does not exceed the daily addition rate of make-up lubricant.
  • Targeted lubrication with a poorly-emulsified lubricant can rapidly improve the surface quality of rolled aluminum and improve consistency in lubrication during the rolling processing.
  • This feature may also be used to overcome various other mill control problems by either decreasing or increasing friction between the work roll and aluminum strip surfaces as required to control differential friction between aluminum and the top versus bottom work rolls or tension problems created by skidding at some mill stands.
  • Embodiments of the invention relate to a rolling mill for hot rolling metal, particularly hot rolling of aluminum with a rolling mill having multiple stands of roll stacks and methods for rolling metal, as described herein.
  • the rolling of metals, such as aluminum, in hot-strip mills is a type of metal forming process that is well known.
  • metal stock is conveyed through a pair of rolls known as a roll stack and rolled into a coil or cut into sheets.
  • the type of rolling process is classified according to the temperature of the metal rolled. If the metal temperature exceeds its recrystallization temperature during rolling, the process is termed hot rolling; if the temperature remains below the recrystallization temperature, then the process is referred to as cold rolling.
  • the metal is rolled through multiple roll stands or stacks of rolls, the sheet of metal reducing in thickness as it passes through each stack and forming a smooth, finished surface.
  • the different stacks may have different configuration or operating condition or applied pressure depending on the process.
  • Figure 1 depicts a conventional rolling mill having three roll stacks, Stack A , Stack B and Stack C, through which a sheet of metal 1 is reduced in thickness in a hot rolling metal forming process.
  • the mill includes a cooling system that discharges a cooling fluid, such as water but more often lubricating oil emulsion in water, onto the rolls to transfer heat and prevent overheating of the rolls during the metal forming process.
  • a cooling fluid such as water but more often lubricating oil emulsion in water
  • the cooling system includes a coolant pump 10 that pumps the same cooling fluid through various discharge nozzles of the cooling system.
  • the cooling system includes roll coolant headers 23, each containing 2 or 3 rows of nozzles 24 directed toward an inlet side of a roll stack that discharges cooling fluid onto the roll surfaces on an upstream side of the pair of rollers.
  • Some rolling mills may also have coolant nozzles, aiming at the rolls at the metal exit side of each roll stack.
  • a lubricant-in-water emulsion having a relatively low concentration of lubricant is used as a cooling fluid, which is then discharged throughout all nozzles of the cooling system.
  • the emulsified lubricant provides a thin layer of lubricant on the surface of the rolls during rolling. Because the water and lubricant are typically immiscible, to prevent separation and ensure a consistent amount of lubricant delivered with the cooling water, emulsifiers are used to form an emulsification to ensure a more uniform distribution of lubricant within the cooling water.
  • a cooling fluid having a relatively low level of emulsified lubricant is generally used. Even when using such techniques, variations in friction may still occur, leading to a poor surface quality of the rolled metal and/or excessive rolling loads with excessive friction or skidding of the work rolls on the metal with inadequate friction.
  • an additional amount of lubricant e.g. oil, synthetic oil, or the like
  • juicing is injected into the common mill supply coolant line sometimes without emulsifiers for discharge through all the coolant headers and nozzles, a process commonly known as "juicing").
  • Such a direct lubrication effect lasts between 10-15 minutes, which is the time equivalent of rolling 2 coils of sheet metal.
  • Juice Lubricant pumping rate larger increases in the amount of lubricant flowing to the mill can be produced, for example, adding 9.1% more lubricant over 10 minutes.
  • the present invention allows for targeted lubrication of select roll stacks and/or bite spray nozzles of a hot rolling apparatus, which allows for more consistent lubrication and control over the lubrication in different roller stacks.
  • the improved lubrication allowed by embodiments of the invention, provides improved surface quality and increases throughput and efficiency in production.
  • targeted lubrication includes delivery of a poorly-emulsified lubricant (possibly but not necessarily with little or no emulsifier-agents) to lubrication nozzles directed toward the roll nip of the roller stack (bite sprays), the lubrication nozzles for a particular stack being fed by a header.
  • the delivery of the additional lubricant is targeted only to the bite sprays and only to the specific headers, the total amount of lubricant delivered is lower than that under present "non-targeted” juicing practices. This allows "targeted lubrication” or “juicing” to be used for a longer time period, thereby improving surface quality of a larger number of coils.
  • Figure 2A illustrates a rolling mill that provides targeted and controlled delivery of lubricant to Stack A.
  • the piping system has been modified such that the work roll cooling discharge nozzles that previously discharged the same cooling fluid through all banks of nozzles (coolant and bite sprays) are configured to discharge a loose-emulsion of lubricant formed in a static mixer through the bite spray nozzles and cooling fluid through the coolant nozzles.
  • the rolling mill configuration in Figure 2A similar to that in Figure 1 , has been modified to provide targeted delivery of lubricant to select roller stacks.
  • the rolling mill includes a separate lubrication pump 20 and cooling fluid pump 10.
  • the cooling fluid pump 10 is fluidly coupled with the coolant spray set of nozzles 24 of the header 23 for each stack through a piping system.
  • the piping system includes an in-line mixer 22 at select stacks to allow formation of the loose-emulsion for discharge at the select stack when desired.
  • the mill is configured with a set of bite lubrication nozzles 25 at the inlet of Stack A that discharge coolant directly toward the bite of the rolls of Stack A and the rolled metal 1.
  • the lubrication pump 20 is fluidly coupled to the bite lubrication nozzles 25 through a lubrication section of the piping system that includes the in-line static mixer 22. Rather than introducing a lubricant emulsion into the supply line of the cooling fluid, the lubricant is introduced into the lubrication section through a separate line and mixes in the in-line mixer 22 with the cooling fluid. The introduction of lubricant into the coolant flow is selectively controlled through valve 21. The lubricant mixes with the cooling water to form a loose emulsion, which is an emulsion that contains relatively large lubricant droplets that can coalesce and separate from cooling water.
  • the loose emulsion is then discharged through the lubrication nozzles to the rolls of the select roll stack, in this embodiment, discharged to the roll bite through the bite lubrication nozzles 25.
  • the lubrication at the roll bite can be readily controlled throughout the rolling process without otherwise altering the flow or composition of the cooling water discharged through the remaining nozzles.
  • the system design assumes 1,24919 m 3 /min (330 GPM) bite spray coolant flow and up to 0,0113562 m 3 /min (3 GPM) injection of the poorly-emulsfiable oil ("juice lubricant") at an operating pressure of 150 psi.
  • a static mixer with a 4" diameter and a 40" length allows sufficient incorporation of the injected oil and cooling water to form a loose-emulsification for discharge through the lubrication nozzles.
  • the calculated linear velocity of coolant flow through the mixer would be 2,52984 m/s (8.3 ft/s) with a pressure drop 5.5 psi.
  • a 0,3048 m/s (1 ft/s) minimum flow rate is recommended to maintain turbulent flow in the static mixer, although for most blending applications a 0,6096-0,9144 m/s (2-3 ft/s) flow rate should be sufficient.
  • a 2,1336-2,4384 m/s (7-8 ft/s) flow rate might be particularly suited to create liquid-liquid dispersions. It is appreciated that mixers of various sizes and shapes may be used in accordance with the principles of the present invention.
  • a pump 20 capable of delivering 0,0113562 m 3 /min (3 gallon per minute) lubricant flow at 170 psi pressure would be suitable to inject the neat lubricant in front of the static mixer, although various other pumps may be used depending on the particular system and associated operational characteristics.
  • part of the mill coolant stand supply stream Prior to the lubricant injection port, part of the mill coolant stand supply stream is split from the typical 6" or 8" stand coolant supply line into a separate bite spray supply line of the smaller diameter, such as a diameter of 4," which is equipped with the static mixer pipe 22.
  • the juicing lubricant is supplied from the neat lubricant tank and injected into the bite spray supply line right upstream of the static mixer.
  • this utilizes a specially-selected pump having the appropriate pressure and a precisely-controlled flow rate.
  • the lubricant is mixed with the coolant in the static mixer 22 and then carried by the bite spray coolant stream to the header 23 and discharged through the bite spray nozzles 25.
  • the milling system is adapted to allow targeted delivery of the lubricant between two or more roller stacks of a rolling mill.
  • the system may include multiple lubricant pumps, each fluidly coupled with the lubrication nozzles at one or more stacks or at different roller stacks. This feature allows delivery of differing amounts and/or type of lubricants to one or more select stacks.
  • the system may include one or more additional valves between the lubricant pump and the lubrication nozzles associated with each stack, such that adjustment of the one or more additional valves allows for differing amounts/ concentrations of lubricant to be delivered to one or more stacks, to different stacks or to be varied during the rolling process as needed. Adjustment of the one or more valves may be performed either by user input command or by an automatic control algorithm based on various operating characteristics.
  • FIG. 2B illustrates another embodiment in which the piping system includes a static mixer 22 at multiple stacks to allow selective lubrication, as needed, at a particular roll stack.
  • the piping system has been modified such that the work roll cooling discharge nozzles that previously discharged the same cooling fluid through all banks of nozzles (coolant and bite sprays) are configured to discharge a loose-emulsion of lubricant formed in the static mixer 22 through the bite spray nozzles at each stack, while cooling fluid continued to discharge through the coolant nozzles.
  • the juice lubricant is selectively introduces so that the loose-emulsion is formed for discharge only at the selected stacks.
  • lubrication at each stack can be readily adjusted, either manually or automatically, in response to observed or determined excessive friction or slipping at a particular stack.
  • the lubricant can be delivered where it will have the largest impact on the rolled metal surface quality and rolling performance of the rolling mill. For example, reroll surface quality on most mills can be markedly improved by aiming the bite/lubrication coolant sprays into the roll nip. In addition, during rolling only some stands may operate under lubrication starvation condition, leading to poor surface finish. Based on the empirical data shown in the graphs in Figures 5 and 6 , the optimal lubricant thickness on the rollers may vary according to the rolling speed. Stands with higher rolling speeds may have an insufficient amount of lubricant released on the rolls or in the roll nip.
  • roll nip temperature might be so high that lubricant is volatilized and degraded.
  • the present invention allows additional lubricant to be delivered to rolls having higher rolling speeds, without "juicing" the cooling fluid for the other stands or the entire cooling supply line.
  • the invention provides a modified header in which the header chamber and control logic may be modified to allow separate feeds to the cooling spray cavity and to the bite spray cavity, valves and nozzles.
  • the modified header may include a separation within the header cavity to define a first portion separate from a second portion such that input of cooling water into the first portion of the header cavity that feeds the cooling discharge nozzles does not mix with lubrication fluid in the second portion that feeds the bite lubrication nozzles.
  • a conventional header 23' such as that shown in view I, includes one or more inlets i through which cooling water is supplied for discharge through the nozzles 24, 25.
  • the conventional header 23' includes a common header cavity such that cooling fluid within the cavity is common to all discharge nozzles.
  • a modified mill header 23, such as that shown in view III, allows for separate feeds to cooling discharges nozzles 24 and bite lubrication nozzles 25 by use of a separation between the lower part of the header cavity (for bite spray) and the top cavity (for coolant spray).
  • the modified header includes port or ports feeding the header cavity connected through inlet valves i 1 to each of the two banks of cooling nozzles, separate from a port or ports feeding the header cavity connected through valves i 2 to the bite spray/lubrication nozzle bank.
  • the separation between the ports and header cavities allows feeding of the cooling nozzles and the bite lubrication nozzles with two different fluids.
  • This modified mill header can readily replace a conventional mill header, thereby allowing retrofitting of convention mills to provide targeted lubrication in accordance with the principles of the present invention.
  • the system may include additional modifications to provide targeted roll bite lubrication in conventional mills that do not already have bite sprays.
  • the "targeted lubrication" concept can be explored in only limited way by injecting additional lubricant into lines feeding entry headers of the individual stands. In this case the lubrication effect would likely be diminished and its duration reduced in proportion to the coolant flow rate through these headers, as shown below in Table 2.
  • the size of the static mixer may be increased.
  • a static mixer device having a 6" diameter and a length of 60" may be used to accommodate 4,163953 m 3 /min (1100 GPM) coolant flow with 11 psi pressure drop, and a size of the oil injector pump can be increased to handle 0,0227125-0,0340687 m 3 /min (6-9 GPM) of additional poorly-emulsified oil.
  • Table 2 Direct lubricating effect of the injected oil during targeted lubrication through selected entry side coolant headers or dedicated bite sprays Header Location Flow Rates [m 3 /min] ([GPM]) Time to deliver 1,24919 m 3 (330 gal) [min] Coolant Oil LJ at 6,25% of oil LJ at 9,1% of oil LJ at 6,25% of oil LJ at 9,1% of oil F1 Entry 2,76714 (731) 0,219554 (58) 0,0105992 (2,8) 0,00794936 (2,1) 117 156 F1 Delivery 4,198022 (1109) F2 Entry 4,198022 (1109) 0,336902 (89) 0,0162773 (4,3) 0,0121133 (3,2) 77 103 F2 Delivery 4,198022 (1109) F3 Entry 4,198022 (1109) F3 Entry 4,198022 (1109) 0,336902 (89) 0,0162773 (4,3) 0,0121133 (3,2) 77 103 F3 Delivery 2,06305 (545) Additional bite spray 1,
  • the advantages of targeted lubricant delivery can be further realized by directing or focusing lubricant delivery on the rolling nip of the rollers and metal sheet. Since conventional rolling apparatus often include lubricating nozzles that discharge generally towards the rollers and not towards the roll bite, such apparatus can be modified in accordance with aspects of the invention to further target delivery of lubricant to the nipping part or bite. For such mills that lack bite sprays and with level control of cooling, suitable headers can be engineered and installed that provide a discharge stream mixed with lubricant and directed to the roll bite.
  • Figure 4 depicts retrofitting of bite sprays into the tandem mill without the bite sprays, showing modifications to guide plates and additional shielding that direct the discharge mixed with lubricant to the roll bite.
  • the lubricant may be delivered in various ways, such as being fed directly through the header, being delivered as a loose-emulsion from a bulk lubricant tank through an in-line mixer, or delivery by any other means suitable for mixing with a bite spray coolant stream at one or more select stacks.
  • the system may include two separate sections for the top and bottom rolls such that the targeted lubrication may differ between the top surface of the strip metal and the bottom surface of the strip metal during rolling.
  • This aspect may be used to provide improved control over surface quality as well as control of friction between the top and bottom side of the slab.
  • Figures 5-7 demonstrate the advantages of using a neat lubricant or a loose emulsion with little or no emulsifier agents in a rolling mill in accordance with aspect of the invention.
  • Figure 5 illustrates the effect of non-ionic emulsifier concentration at 50° C on oil film formation (data source: Cambiella, A., Benito, J.M., Pazos, C, Coca, J., Ratoi, M, Spikes, H.A., Tribol. Lett. 22, 53-65, 2006 ).
  • Figure 6 illustrates the effect of the oil-water concentration in emulsions on oil film formation (data source: Yang, H., Schmid, S.R., Reich, R.A., Kasun, T.J., Tribol. Trans.
  • Figure 7 illustrates rolling loads measured on the laboratory rolling mill with neat lubricants and their associated oil-in-water emulsions, the distance from the diagonal to each data point increases along with increasing differences in anti-friction properties between the neat oils and their corresponding emulsions.
  • targeted lubrication can be easily modified to feed hot water or hot water with emulsifiers selectively into select bite sprays. This should result in the increase of friction, allowing mill threading without refusals as well as control of differential friction such as between top and bottom rolls and between stands.
  • principles of the present invention may be used to modify conventional rolling mills and provide the advantages and benefits described herein.

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Claims (20)

  1. Appareil de laminage de feuille de métal, ledit appareil comprenant :
    au moins une colonne de cage de laminage présentant une paire de rouleaux, entre lesquels une feuille de métal est laminée pour réduire son épaisseur, dans lequel la paire de rouleaux inclut un rouleau supérieur et un rouleau inférieur ;
    une pompe à fluide de refroidissement (10) adaptée pour pomper un fluide de refroidissement vers une ou plusieurs buses de refroidissement par un système de canalisation ;
    une pompe à lubrifiant (20) adaptée pour pomper un lubrifiant de jus dans le système de canalisation,
    un ensemble de buses à pincement de lubrification adaptées pour évacuer un fluide lubrifiant sur un côté d'entrée de chaque rouleau supérieur et inférieur de la paire de rouleaux, l'ensemble de buses à pincement de lubrification comprenant une ou plusieurs buses à pincement de lubrification (25) orientées sur une zone à pincement de rouleau de la paire de rouleaux et la feuille de métal ;
    un ensemble de buses de refroidissement adaptées pour évacuer le fluide de refroidissement sur une surface de rouleau du rouleau supérieur au-dessus de la pulvérisation à pincement et évacuer le fluide de refroidissement sur une surface de rouleau du rouleau inférieur sous la pulvérisation à pincement, l'ensemble de buses de refroidissement comprenant une ou plusieurs buses de refroidissement (24) ; caractérisé par
    le système de canalisation qui est configuré de sorte que le lubrifiant de jus se mélange avec le fluide de refroidissement pour former le fluide lubrifiant avant l'évacuation par l'une ou plusieurs buses à pincement de lubrification alors que le fluide de refroidissement s'écoule vers les buses de refroidissement de sorte que le fluide lubrifiant évacué soit un fluide lubrifiant produit par le mélange du fluide de refroidissement avec le lubrifiant de jus.
  2. Appareil de laminage de feuille de métal selon la revendication 1, dans lequel le système de canalisation inclut une section de refroidissement et une section de lubrification,
    la section de refroidissement couplant fluidiquement la pompe à fluide de refroidissement (10) aux buses de refroidissement (24), et la section de lubrification couplant fluidiquement la pompe à lubrifiant (20) et la pompe de réfrigérant (10) aux buses à pincement de lubrification (25).
  3. Appareil de laminage de feuille de métal selon la revendication 2, dans lequel les buses à pincement de lubrification (25) sont configurées de sorte que le fluide évacué de celles-ci soit orienté sur un pincement de rouleau où la paire de rouleaux touche la feuille de métal.
  4. Appareil de laminage de feuille de métal selon la revendication 2 ou 3, dans lequel la section de lubrification inclut un mélangeur statique en ligne (22) disposé entre la valve (21) et les buses de lubrification (25) de sorte que le fluide de refroidissement et le lubrifiant se mélangent dans le mélangeur pour former une émulsification du fluide de refroidissement et du lubrifiant pour évacuer par les buses de lubrification (25).
  5. Appareil de laminage de feuille de métal selon l'une quelconque des revendications 1 à 4, comprenant en outre :
    une tête de laminage (23) présentant une chambre de fluide de lubrification et une chambre de fluide de refroidissement, les chambres étant séparées, dans lequel la chambre de fluide de lubrification est couplée fluidiquement aux buses de lubrification (25) et la chambre de fluide de refroidissement est couplée fluidiquement aux buses de refroidissement (24).
  6. Appareil de laminage de feuille de métal selon l'une quelconque des revendications 1 à 5, dans lequel l'appareil est adapté pour le laminage à chaud de feuille d'aluminium.
  7. Appareil de laminage de feuille de métal selon l'une quelconque des revendications 1 à 6, dans lequel le fluide de refroidissement comprend une émulsion aqueuse ou diluée et étanche d'eau en huile et le lubrifiant comprend de l'huile.
  8. Appareil de laminage de feuille de métal selon l'une quelconque des revendications 1 à 7, dans lequel l'au moins une colonne de cage de laminage comprend deux ou plus colonnes, chacune présentant une paire de rouleaux, entre lesquels la feuille de métal est laminée pour réduire son épaisseur après avoir été laminée par la première colonne de cages de laminage ;
    un ou plusieurs ensembles supplémentaires de buses de lubrification, chaque ensemble présentant des buses à pincement de lubrification adaptées pour évacuer un fluide lubrifiant sur un côté d'entrée de la paire de rouleaux d'une ou plusieurs colonnes de cage de laminage sélectionnées, les buses de lubrification de chaque ensemble étant couplées à la fois à la pompe à lubrifiant et à la pompe à fluide de refroidissement par le système de canalisation.
  9. Appareil de laminage de feuille de métal selon l'une quelconque des revendications 1 à 8, dans lequel les buses de lubrification (25) fournissent des pulvérisations à pincement.
  10. Appareil de laminage de feuille de métal selon l'une quelconque des revendications 1 à 9, dans lequel le premier ensemble de buses de lubrification comprend une ou plusieurs buses d'évacuation de fluide qui dirigent du fluide évacué des buses d'évacuation vers une partie de pincement de la paire de rouleaux.
  11. Appareil de laminage de feuille de métal selon l'une quelconque des revendications 1 à 10, dans lequel le système de canalisation est configuré de sorte qu'une concentration du lubrifiant et du fluide de refroidissement évacué des buses de refroidissement soit différente de celle du lubrifiant et du fluide de refroidissement évacué de l'ensemble de buses à pincement de lubrification.
  12. Appareil de laminage de feuille de métal selon l'une quelconque des revendications 1 à 11, dans lequel le système de canalisation est configuré de sorte qu'une composition du lubrifiant dans le fluide lubrifiant et une composition du lubrifiant dans le fluide de refroidissement soient différentes.
  13. Appareil de laminage de feuille de métal selon l'une quelconque des revendications 1 à 12, dans lequel la canalisation, les valves et le système de pompage de lubrifiant de jus sont configurés de sorte que le fluide lubrifiant puisse contenir une concentration en lubrifiant et une composition différentes sur chaque colonne de cage de laminage.
  14. Procédé de laminage de feuille réalisé en utilisant l'appareil selon l'une quelconque des revendications précédentes, ledit procédé comprenant :
    le laminage d'une feuille de métal entre une paire de rouleaux d'un appareil de laminage de rouleau ; et
    la lubrification d'une interface entre le métal laminé et chaque rouleau de la paire de rouleaux avec un fluide de lubrification pendant le laminage, le fluide de lubrification comprenant un mélange d'un fluide de refroidissement et d'un lubrifiant de jus, le fluide de refroidissement et le lubrifiant de jus étant pompés respectivement dans un système de canalisation par une pompe à fluide de refroidissement (10) et une pompe de lubrification (20), et mélangés dans le système de canalisation avant d'être évacués par un ensemble de buses à pincement de lubrification (25).
  15. Procédé selon la revendication 14, comprenant en outre :
    le mélange du fluide lubrifiant et du fluide de refroidissement dans le système de canalisation dans un mélangeur statique pour former une émulsion libre de lubrifiant et de fluide de refroidissement.
  16. Procédé selon la revendication 14 ou 15, ledit procédé comprenant en outre :
    le laminage de la feuille de métal entre une paire de rouleaux d'une ou plusieurs colonnes de cage supplémentaires de l'appareil de laminage de métal après le laminage par la première colonne de cage ;
    la lubrification d'une interface entre le métal laminé et chacun de la paire de rouleaux de n'importe laquelle sélectionnée ou toutes les colonnes de cage de laminage avec un fluide de lubrification pendant le laminage.
  17. Procédé selon la revendication 16, dans lequel le mélange de fluide lubrifiant et fluide de refroidissement évacué des buses à pincement de lubrification est le même sur chaque colonne de cage de laminage.
  18. Procédé selon la revendication 16, dans lequel le mélange de fluide lubrifiant et de refroidissement évacué des buses à pincement de lubrification est différent sur chaque colonne de cage de laminage.
  19. Procédé selon la revendication 14, dans lequel l'appareil comprend au moins deux empilages de rouleaux, chacun comprenant une paire de rouleaux et des buses à pincement de lubrification associées, dans lequel la canalisation inclut un mélangeur statique entre une source de lubrifiant de jus et les buses à pincement de lubrification pour chaque empilage de rouleau, le procédé comprenant en outre : la lubrification sélective d'un empilage de rouleau sélectionné par introduction de lubrifiant de jus dans le mélangeur statique associé aux buses à pincement de lubrification pour l'empilage de rouleau sélectionné.
  20. Procédé selon la revendication 14, dans lequel l'appareil comprend au moins deux empilages de rouleaux, chacun comprenant une paire de rouleaux et un ensemble associé de buses de lubrification, chaque ensemble de buses de lubrification présentant une tête, le procédé comprenant en outre : la lubrification sélective d'un empilage de rouleau sélectionné par introduction de lubrifiant de jus dans la tête de l'ensemble de buses de lubrification associées à l'empilage de rouleau sélectionné.
EP14720800.3A 2013-03-15 2014-03-13 Procédés de fabrication et appareil pour la lubrification ciblée dans le laminage de métal à chaud Revoked EP2969278B1 (fr)

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US201361798769P 2013-03-15 2013-03-15
PCT/US2014/026343 WO2014151731A1 (fr) 2013-03-15 2014-03-13 Procédés de fabrication et appareil pour la lubrification ciblée dans le laminage de métal à chaud

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JP (1) JP2016512174A (fr)
KR (1) KR20160012994A (fr)
CN (1) CN105339101A (fr)
BR (1) BR112015018406A2 (fr)
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EP2735383B1 (fr) * 2011-07-21 2016-05-25 Nippon Steel & Sumitomo Metal Corporation Appareil de refroidissement, et appareil de fabrication de tôle d'acier laminée à chaud, et procédé de fabrication de tôle d'acier laminée à chaud
DE102013107010A1 (de) * 2013-07-03 2015-01-22 Thyssenkrupp Steel Europe Ag Anlage und Verfahren zum Warmwalzen von Stahlband
CA3037759C (fr) * 2016-09-27 2021-04-20 Novelis Inc. Traitement thermique compact de solution de recuit en continu
KR102239179B1 (ko) * 2019-10-15 2021-04-12 주식회사 포스코 압연설비의 혼합용액 공급장치
CN117798191B (zh) * 2024-02-28 2024-05-10 常州市力俊机械有限公司 一种可调控黑色金属压延定位工装及使用方法

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KR20160012994A (ko) 2016-02-03
WO2014151731A1 (fr) 2014-09-25
ES2639741T3 (es) 2017-10-30
EP2969278A1 (fr) 2016-01-20
BR112015018406A2 (pt) 2017-07-18
JP2016512174A (ja) 2016-04-25
CN105339101A (zh) 2016-02-17
US20140260476A1 (en) 2014-09-18

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