EP2969278B1 - Manufacturing methods and apparatus for targeted lubrication in hot metal rolling - Google Patents
Manufacturing methods and apparatus for targeted lubrication in hot metal rolling Download PDFInfo
- 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
- Prior art date
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- Revoked
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- 238000005096 rolling process Methods 0.000 title claims description 81
- 238000005461 lubrication Methods 0.000 title claims description 79
- 229910052751 metal Inorganic materials 0.000 title claims description 56
- 239000002184 metal Substances 0.000 title claims description 56
- 238000004519 manufacturing process Methods 0.000 title description 6
- 239000000314 lubricant Substances 0.000 claims description 106
- 239000012809 cooling fluid Substances 0.000 claims description 44
- 239000002826 coolant Substances 0.000 claims description 38
- 239000007921 spray Substances 0.000 claims description 35
- 238000001816 cooling Methods 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 29
- 239000000839 emulsion Substances 0.000 claims description 27
- 230000001050 lubricating effect Effects 0.000 claims description 24
- 239000012530 fluid Substances 0.000 claims description 19
- 230000003068 static effect Effects 0.000 claims description 17
- 235000011389 fruit/vegetable juice Nutrition 0.000 claims description 16
- 238000005098 hot rolling Methods 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 4
- 238000004945 emulsification Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 239000004411 aluminium Substances 0.000 claims 1
- 239000007762 w/o emulsion Substances 0.000 claims 1
- 239000003921 oil Substances 0.000 description 27
- 239000003995 emulsifying agent Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 239000000498 cooling water Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 230000008901 benefit Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
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- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 238000009420 retrofitting Methods 0.000 description 2
- JTCWXISSLCZBQV-UHFFFAOYSA-N tribol Natural products CC(CO)CCC1OC2(O)CC3C4CC=C5CC(CCC5(C)C4CCC3(C)C2C1C)OC6OC(CO)C(OC7OC(C)C(O)C(O)C7O)C(O)C6OC8OC(C)C(O)C(O)C8O JTCWXISSLCZBQV-UHFFFAOYSA-N 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- -1 aluminum Chemical class 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
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- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000012875 nonionic emulsifier Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Images
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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Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201361798769P | 2013-03-15 | 2013-03-15 | |
PCT/US2014/026343 WO2014151731A1 (en) | 2013-03-15 | 2014-03-13 | Manufacturing methods and apparatus for targeted lubrication in hot metal rolling |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2969278A1 EP2969278A1 (en) | 2016-01-20 |
EP2969278B1 true EP2969278B1 (en) | 2017-08-02 |
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ID=50628963
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14720800.3A Revoked EP2969278B1 (en) | 2013-03-15 | 2014-03-13 | Manufacturing methods and apparatus for targeted lubrication in hot metal rolling |
Country Status (8)
Country | Link |
---|---|
US (1) | US20140260476A1 (es) |
EP (1) | EP2969278B1 (es) |
JP (1) | JP2016512174A (es) |
KR (1) | KR20160012994A (es) |
CN (1) | CN105339101A (es) |
BR (1) | BR112015018406A2 (es) |
ES (1) | ES2639741T3 (es) |
WO (1) | WO2014151731A1 (es) |
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DE102008050392A1 (de) * | 2008-06-18 | 2009-12-24 | Sms Siemag Aktiengesellschaft | Verfahren und Vorrichtung zum Schmieren von Walzen und eines Walzbandes eines Walzgerüsts |
US9486847B2 (en) * | 2011-07-21 | 2016-11-08 | Nippon Steel & Sumitomo Metal Corporation | Cooling apparatus, and manufacturing apparatus and manufacturing method of hot-rolled steel sheet |
DE102013107010A1 (de) * | 2013-07-03 | 2015-01-22 | Thyssenkrupp Steel Europe Ag | Anlage und Verfahren zum Warmwalzen von Stahlband |
DE212017000208U1 (de) | 2016-09-27 | 2019-04-08 | Novelis, Inc. | System für das berührungslose Spannen eines Metallstreifens |
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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US3855136A (en) | 1971-11-15 | 1974-12-17 | Kaiser Aluminium Chem Corp | Dispersion for hot rolling aluminum products |
JPH038510A (ja) | 1989-06-06 | 1991-01-16 | Sumitomo Light Metal Ind Ltd | アルミニウム熱間圧延における潤滑方法 |
US5090225A (en) | 1988-10-18 | 1992-02-25 | Sms Schloemann-Siemag Aktiengesellschaft | Method for cooling and lubricating chiplessly shaped metals |
JPH10314805A (ja) | 1997-05-19 | 1998-12-02 | Sumitomo Light Metal Ind Ltd | アルミニウムの冷間圧延方法 |
EP0908248A2 (de) | 1997-10-09 | 1999-04-14 | Sms Schloemann-Siemag Aktiengesellschaft | Vorrichtung und Verfahren zur Beeinflussung der Reibungsverhältnisse zwischen einer oberen und einer unteren Walze eines Walzgerüstes |
JP2000351002A (ja) | 1999-06-08 | 2000-12-19 | Kawasaki Steel Corp | 熱延鋼帯の製造方法および仕上タンデム圧延機 |
EP1193004A1 (en) | 2000-03-09 | 2002-04-03 | Nkk Corporation | Rolling oil supplying method for cold rolling |
WO2003002277A1 (de) | 2001-06-28 | 2003-01-09 | Sms Demag Aktiengesellschaft | Verfahren und vorrichtung zum kühlen und schmieren von walzen eines walzgerüstes |
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- 2014-03-13 CN CN201480008003.8A patent/CN105339101A/zh active Pending
- 2014-03-13 US US14/209,484 patent/US20140260476A1/en not_active Abandoned
- 2014-03-13 EP EP14720800.3A patent/EP2969278B1/en not_active Revoked
- 2014-03-13 ES ES14720800.3T patent/ES2639741T3/es active Active
- 2014-03-13 KR KR1020157029600A patent/KR20160012994A/ko not_active Application Discontinuation
- 2014-03-13 BR BR112015018406A patent/BR112015018406A2/pt not_active Application Discontinuation
- 2014-03-13 WO PCT/US2014/026343 patent/WO2014151731A1/en active Application Filing
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US5090225A (en) | 1988-10-18 | 1992-02-25 | Sms Schloemann-Siemag Aktiengesellschaft | Method for cooling and lubricating chiplessly shaped metals |
EP0367967B1 (de) | 1988-10-18 | 1994-09-07 | Sms Schloemann-Siemag Aktiengesellschaft | Verfahren und Vorrichtung zur Kühlung und Schmierung von Walzen und Walzgut beim Kaltwalzen |
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JPH10314805A (ja) | 1997-05-19 | 1998-12-02 | Sumitomo Light Metal Ind Ltd | アルミニウムの冷間圧延方法 |
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EP1193004A1 (en) | 2000-03-09 | 2002-04-03 | Nkk Corporation | Rolling oil supplying method for cold rolling |
WO2003002277A1 (de) | 2001-06-28 | 2003-01-09 | Sms Demag Aktiengesellschaft | Verfahren und vorrichtung zum kühlen und schmieren von walzen eines walzgerüstes |
US7690235B2 (en) | 2004-05-18 | 2010-04-06 | Sms Demag Ag | Method of and device for cooling and or lubrication |
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DE602005006318T2 (de) | 2004-11-19 | 2009-07-09 | Arcelormittal France | Verfahren zur schmiermittelzuführung während eines warmwalzverfahrens |
EP1829625A1 (en) | 2004-11-22 | 2007-09-05 | Nippon Steel Corporation | Method for supplying lubricating oil in cold rolling |
JP2012166260A (ja) | 2011-01-24 | 2012-09-06 | Kobe Steel Ltd | 圧延における潤滑油供給方法および潤滑油供給装置 |
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Also Published As
Publication number | Publication date |
---|---|
BR112015018406A2 (pt) | 2017-07-18 |
WO2014151731A1 (en) | 2014-09-25 |
EP2969278A1 (en) | 2016-01-20 |
JP2016512174A (ja) | 2016-04-25 |
ES2639741T3 (es) | 2017-10-30 |
KR20160012994A (ko) | 2016-02-03 |
CN105339101A (zh) | 2016-02-17 |
US20140260476A1 (en) | 2014-09-18 |
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