JP2016512174A - Manufacturing method and apparatus for directional lubrication in hot metal rolling - Google Patents

Abstract

A rolling apparatus and hot rolling method using directional lubrication is provided herein. A rolling mill having a plurality of roll stacks (A, B, C) includes a cooling fluid pump (10) and a lubricant pump fluidly coupled to a cooling nozzle (24) and a lubrication nozzle (25) through a piping system. (20). The piping system includes one or more lubrication nozzles (25) with pure lubricant mixed with a cooling fluid so that the lubricant pump (20) forms a lubricating fluid as a dilute lubricant-type emulsion for discharge. ) Through the selected roll stack (A, B, C), while one or more cooling nozzles (24) may be configured to release cooling fluid without the use of additional lubricant. The lubrication nozzle (25) may be directed to directed release of the lubrication emulsion in the interstitial roll. It is also provided to modify the rolling mill header (24) to provide directional lubrication according to the present invention.

Description

  This application claims the benefit of US Provisional Application No. 61 / 798,769, filed Mar. 15, 2013, which is incorporated herein by reference in its entirety.

  The present invention relates to a manufacturing method and apparatus for hot rolling a sheet metal. In particular, the present invention provides a manufacturing method and apparatus with enhanced lubrication to improve the surface quality of rolled sheet metal such as hot rolled aluminum.

  In one aspect, the present invention provides a manufacturing method and rolling apparatus having enhanced directional lubrication to improve rolled sheet metal surface quality and production efficiency. The present invention is particularly useful for rolling aluminum on a rolling mill having a plurality of roll stands.

  According to one aspect, the present invention provides one or more lubrication nozzles (e.g., for discharging a lubricant, often a low emulsification lubricant, into a roll, directed toward a roll gap or gap. Provides delivery to a bite nozzle. In one aspect, the low emulsification lubricant is delivered only to certain rolling mill platforms, rolls or headers. In certain embodiments, the low emulsification lubricant may be delivered in different amounts or compositions to different mill stacks, rolls, or headers. By this directional lubrication, lubrication control (for example, increase or decrease in friction) can be improved in a specific rolling mill base as required. In general, the delivery rate of the additional lubricant or lubricant component should be such that it does not exceed the daily rate of addition of the pacing lubricant. Directional lubrication using a low emulsifying lubricant can quickly improve the surface quality of the rolled aluminum and improve the consistency of lubrication during the rolling process. This feature allows various other rolling by reducing or increasing the friction between the work roll and the aluminum strip surface as needed to control the differential friction between the aluminum and the top-to-bottom work roll. It may be used to overcome machine control problems or tension problems caused by slipping on some rolling mill tables.

The schematic of the conventional rolling mill is shown. 1 shows a schematic diagram of a continuous aluminum hot rolling mill according to an aspect of the present invention. FIG. 1 shows a schematic diagram of a continuous aluminum hot rolling mill according to an aspect of the present invention. FIG. A conventional header (shown in developments I and II) and a modified header (shown in development III) are shown. Fig. 4 shows a continuous rolling mill with an additional gap spray header according to an embodiment of the invention. The effect of lubricants with various emulsifier concentrations on the oil film thickness during hot rolling is illustrated by a graph. The graph illustrates the effect of a lubricant having emulsions with different oil / water concentrations on the oil film thickness during hot rolling. The hot rolling load with the lubricant used in the emulsion form is compared graphically with the rolling load for the same lubricant in the pure form without water.

  Embodiments of the present invention relate to a rolling mill for hot rolled metal, and more particularly to an aluminum hot rolling and metal rolling method using a rolling mill having a plurality of roll stack bases as described in the present invention. .

  Rolling a metal such as aluminum on a hot strip mill is one type of metal forming process that is well known. In the rolled metal forming process, a metal blank is conveyed through a pair of rolls known as a roll stack and rolled into a roll or cut into strips. The type of rolling process is classified by the temperature of the rolled metal. If the metal temperature exceeds its recrystallization temperature during rolling, the process is called hot rolling. If the temperature remains below the recrystallization temperature, the process is called cold rolling. Usually, the metal is rolled through a plurality of roll platforms or roll stacks. The metal strip is reduced in thickness as it passes through each stack, creating a smooth finished surface. Different stacks may have different configurations or operating conditions or applied pressures depending on the process.

  FIG. 1 illustrates a conventional having three roll stacks, stack A, stack B and stack C, through which the thickness of a metal strip (or sheet of metal) 1 is reduced in a hot rolled metal forming process. A rolling mill is shown. Because the temperature of the metal being brought in, the friction and deformation of that metal during rolling generate significant heat in each stack roll, the mill transfers heat and overheats the roll during the metal forming process. In order to prevent this, it includes a cooling system that releases water, but more often a cooling fluid, such as a submerged lubricating emulsion, onto the roll. Typically, the cooling system includes a coolant pump 10 that delivers the same cooling fluid through the various discharge nozzles of the cooling system. The cooling system delivers a coolant coolant stream 23 that includes two or three tandem nozzles 24 each directed toward the suction side of the roll stack that discharges cooling fluid onto the roll surface upstream of the pair of rollers. A pump 10 is included. Some rolling mills may also have a coolant nozzle that is directed to the roll on the metal exit side of each roll stack.

  In order to provide a certain level of friction, an underwater lubricant type emulsion with a relatively low concentration of lubricant is used as a cooling fluid, which is then discharged across all nozzles of the cooling system. Emulsified lubricants provide a thin layer of lubricant on the surface of the roll being rolled. Since water and lubricants are usually immiscible, emulsification is used with emulsifiers to prevent separation and ensure a certain amount of lubricant delivered with water, making the lubricant more uniform in cooling water To ensure that it is distributed. One drawback of such techniques is that certain formulations may require more emulsifiers than desired, and the presence of emulsifiers may reduce the overall efficiency of the lubricant and further increase costs. It is. Another disadvantage is that lubricant-type emulsions are discharged from all cooling nozzles with a limited ability to change the lubricant concentration as needed for a particular roller stack or rolled product. Furthermore, normal maintenance of hot rolling mill coolant requires that the coolant in use be partially discarded as the coolant becomes contaminated. This results in wasted lubricant in proportion to its concentration in the cooling fluid.

  In order to avoid discarding more lubricant than necessary, a cooling fluid having a relatively low concentration of emulsified lubricant is generally used. Even with such a technique, friction fluctuations may still occur, resulting in poor surface quality and / or excessive friction resulting in excessive rolling load or working with inappropriate friction The roll will slide on the metal. In many conventional systems, after excessive friction or failure is observed, an additional amount of lubricant (e.g., oil, synthetic lubricant, etc.) is released throughout the coolant header and nozzle, Occasionally without an emulsifier, it is injected into a common mill coolant supply line, the process usually known as “filling”). This temporarily addresses the problem by increasing the lubrication layer, thereby reducing friction in the stack roller where additional lubrication is desired, as well as in each other roller stack. Since lubricant is incorporated into the cooling fluid throughout the cooling system, the addition of such lubricants has been generally limited to avoid exceeding the desired lubricant concentration in the coolant. It can only be done with a very low “filling” over the duration. For example, as shown in the experimental results of Table 1, 330 gallons of filling lubricant on the suction surface of the coolant supply pump over 15 minutes (filling lubricant = hot rolling formulation often without emulsifier) Only injects more than about 6.25% of the oil in the form of lean oil droplets into the cooling fluid flowing into the mill. Such a direct lubrication effect lasts 10-15 minutes, which is equivalent to rolling two sheet metal coils. Increasing the filled lubricant delivery rate can increase the amount of lubricant flowing to the mill, for example, adding more than 9.1% lubricant over 10 minutes.

  In view of the above, rolling with conventional lubrication methods can cause some product rolling to be delayed and adjusted when problems associated with inadequate lubrication are observed. Along with increasing costs and reducing throughput, it complicates the rolling process. This approach may also require rework or coolant composition adjustment. Thus, improving the consistency and control of lubrication when hot rolling sheet metal, avoiding the disadvantages associated with conventional methods, unnecessarily complicating or increasing the cost and time associated with the rolling process. There is a need for rolling equipment and methods that improve rolling without problems. In addition, it would be further desirable if such a method or apparatus could be incorporated as a modification or modification of a conventional rolling mill.

  In one aspect, the present invention enables directional lubrication of selected roll stacks and / or interstitial spray nozzles in hot rolling equipment that allows more consistent lubrication and lubrication control with different roller stacks. The improved lubrication enabled by embodiments of the present invention improves surface quality and increases throughput and production efficiency. In one aspect, directional lubrication involves delivering a low emulsification lubricant (possibly but not necessarily using too much or no emulsifier) to a lubrication nozzle (gap spray) directed towards the roll gap of the roller stack. Including, a header is supplied to the lubrication nozzle for a particular stack. Since the delivery of additional lubricants in these embodiments is directed only to the gap spray and only to certain headers, the total amount of lubricant delivered is less than that under existing “non-directional” filling practices. This allows “directional lubrication” or “filling” to be used over a long period of time, thereby improving the quality of the surface of many coils. For example, with 330 GPM gap spray flow through both nozzles, the direct effect of the same 330 gallon filled lubricant is extended to 188 minutes (6.25% relative to the oil initially present in the coolant). (Assuming an injection volume that produces additional oil) or an injection volume that produces 9.1% additional oil can be extended to 125 minutes. This increase in duration of effect can improve the diurnal production of rollable stock (CES) coils or other surface sensitive alloys that usually require conventional lubrication techniques.

  An embodiment of the present invention according to the above aspects is shown in FIGS. FIG. 2A shows a rolling mill that delivers lubricant to Stack A in a directed and controlled manner. Piping system is a work roll cooling discharge nozzle that pre-discharges the same cooling fluid through all nozzles (coolant and gap spray) layers, gap spray the lubricant-type dilute emulsion produced in a powerless mixer It has been modified to be configured to pass cooling fluid through the nozzle and through the coolant nozzle.

  The configuration of the rolling mill of FIG. 2A, similar to FIG. 1, has been modified to directionally deliver lubricant to the selected roller stack. The rolling mill includes a separate lubricant pump 20 and cooling fluid pump 10. The cooling fluid pump 10 is fluidly coupled to the coolant spray collection of the nozzles 24 of the header 23 for each stack that passes through the piping system. The plumbing system includes a series mixer 22 in the selective stack so that a dilute emulsion can be produced for release in the selective stack when desired. In this embodiment, the rolling mill consists of a set of gap lubrication nozzles 25 at the inlet of stack A that discharge the coolant directly into the gap of the rolls of stack A and to the rolled metal 1. The lubricant pump 20 is fluidly coupled to the gap lubrication nozzle 25 through the lubrication portion of the piping system including the in-line powerless mixer 21. Rather than injecting the lubricant type emulsion into the cooling fluid supply line, the lubricant is injected into the lubrication section through the separation line and mixed with the cooling fluid in the in-line mixer 22. The injection of lubricant into the coolant flow is selectively controlled by valve 21. The lubricant is mixed with the cooling water to form a dilute emulsion that is an emulsion containing relatively large lubricant droplets that can be coarsely separated from the cooling water. The dilute emulsion is then discharged through a lubrication nozzle to the rolls of a selective roll stack, and in this embodiment is discharged through a gap lubrication nozzle 25 into the roll gap. Therefore, by selectively injecting lubricant into the in-line powerless mixer, rolls can be made throughout the rolling process, especially without changing the flow or composition of the cooling water discharged through the remaining nozzles. Lubrication in the gap can be easily controlled.

  In an exemplary mill operating model, the system design assumes a 330 GPM interstitial spray coolant flow, and at 150 psi operating pressure, up to 3 GPM low emulsified oil (“fill lubricant”) injection. Under these operating characteristics, a non-powered mixer having a diameter of 4 inches and a length of 40 inches results in injected oil and cooling to provide a thin emulsification for discharge through the lubrication nozzle. Can be combined with water. The calculated linear velocity of the coolant flow through the mixer can be 8.3 ft / s with a pressure drop of 5.5 psi. In general, a flow rate of 2-3 ft / s should be sufficient for most mixing applications, but a minimum flow rate of 1 ft / s is recommended to maintain turbulence in the unpowered mixer. In some embodiments, a flow rate of 7-8 ft / s may be particularly suitable for producing a liquid-liquid dispersion. It will be appreciated that various sizes and shapes of mixers may be used in accordance with the principles of the present invention. In general, a variety of other pumps may be used depending on the particular system and associated operating characteristics, but a pump 20 capable of delivering 3 gallons of lubricant flow at 170 psi pressure requires no power. It may be appropriate to inject pure lubricant before the mixer. A portion of the mill table coolant supply stream is typically from a 6 or 8 inch pedestal coolant supply line, prior to the lubricant inlet, to a small diameter such as a 4 inch diameter with a powerless mixer line 22. Divided into separate gap spray supply lines. The filled lubricant is supplied from the genuine lubricant tank and is injected into the upstream of the right side of the gap spray supply line of the powerless mixer. Usually this uses a specially selected pump with the appropriate pressure and a precisely controlled flow rate. The lubricant is mixed with the coolant in the powerless mixer 22 and then conveyed to the header 23 by the gap spray coolant flow and discharged through the gap spray nozzle 25.

  In other aspects, the rolling system is suitable for enabling directional delivery of lubricant between two or more roller stacks of a rolling mill. In some embodiments, the system may include a plurality of lubricant pumps each fluidly coupled to the lubrication nozzles in one or more stacks or in different roller stacks. This feature allows different amounts and / or types of lubricants to be delivered to one or more selected stacks. In other embodiments, the system may include one or more additional valves between the lubricant pump and the lubricating nozzle connected to each stack, so by adjusting one or more additional valves One or more stacks can be delivered different amounts / concentrations of lubricant to different stacks, or can be varied during the rolling process as needed. The adjustment of one or more valves can be performed either by user input commands or automatic control algorithms based on various operating characteristics.

  FIG. 2B shows another embodiment in which the piping system includes a non-powered mixer 22 in multiple stacks and optionally in a specific roll stack to allow selective lubrication. The piping system has a work roll cooling discharge nozzle that pre-releases the same cooling fluid through all nozzle layers (coolant and gap spray) and passes through the gap spray nozzle in each stack within the powerless mixer 22. The lubricant-type dilute emulsion that is formed is discharged, while the cooling fluid is modified to continue to be discharged through the coolant nozzle. By using valve 21, the filled lubricant is selectively injected such that a dilute emulsion is formed for release only in selected stacks. This can be useful during the rolling process where additional lubrication is desired at the downstream nozzle roll gap at some point during the rolling process. In addition, the lubrication in each stack can be easily adjusted, either manually or automatically, in response to excessive friction or slip observed or measured in a particular stack.

  Since the delivery of the lubricant is directional, the lubricant can be delivered to a location that has the greatest impact on the quality of the rolled metal surface and the rolling performance of the rolling mill. For example, directing the gap / lubricating coolant spray to the roll gap can significantly improve the quality of the rerolled surface on most rolling mills. In addition, only the pedestal being rolled may operate under lubrication deficient conditions, resulting in poor surface finish quality. Based on the empirical data shown in the graphs of FIGS. 5 and 6, the optimum lubricant thickness on the roll may vary according to the rolling speed. With high rolling speed pedestals, the amount of lubricant released onto the roll or into the roll gap may be insufficient. On some pedestals, the roll gap temperature can be so high that it volatilizes and degrades the lubricant. The present invention allows additional lubricant to be delivered to rolls having high rolling speeds without “filling” the cooling fluid to other pedestals or the entire cooling supply line.

Many conventional hot rolling mills use a cooling and gap lubricated spray nozzle layer. In such rolling mills, both types of nozzles are fed from a common cavity in the coolant header. In one aspect, the present invention provides a modified header in which the header chamber and control logic can be modified so that the cooling and gap spray cavities, valves, and nozzles can be fed separately. For example, the modified header may be configured so that the inflow of cooling water into the first portion of the header cavity supplying the cooling discharge nozzle does not mix with the lubricating fluid in the second portion supplying the gap lubrication nozzle. A separation wall may be included in the header cavity to define a first portion separated from the two portions. As shown in the example of FIG. 3, a conventional header 23 ′ such as that shown in development I includes one or more inlets i for receiving cooling water for discharge through nozzles 24, 25. , Through its inlet. As can be seen in cross-sectional view (II), the conventional header 23 'includes a common header cavity such that the cooling fluid in the cavity is common to all discharge nozzles. With a modified rolling mill header 23 such as that shown in development III, the cooling discharge nozzle 23 is separated from the bottom of the header cavity (for gap spray) and the top cavity (for coolant spray) by The gap lubrication nozzle 25 can be supplied separately. Since many conventional rolling mill and a two cooling nozzle layer and one gap spray / lubricant nozzle layer, modified headers, header cavities connected to each of the two cooling nozzle layer through the suction valve i ₁ includes a supply vent (s) or vent (s) on the vent, the suction valve i ₂ through gaps spray / lubricant nozzle layer connected to header cavity supplied vent (s) or vent Separate from (multiple). The separation between the vent and the header cavity allows two different fluids to be supplied to the cooling nozzle and the gap lubrication nozzle. This modified rolling mill header can be easily replaced with a conventional rolling mill header, thereby modifying the conventional rolling mill to provide directional lubrication according to the principles of the present invention.

  In another aspect, the system may include additional modifications to provide directional roll gap lubrication for conventional rolling mills that do not yet have gap spray. In rolling mills that do not use gap spray and use cooling level control, the concept of directional lubrication is limited in a limited way by injecting additional lubricant into the lines feeding the inflow headers of the individual pedestals. Can be deployed. In this case, the lubrication effect appears to decrease and its duration decreases in proportion to the coolant flow rate through these headers, as shown in Table 2 below. In order to allow additional coolant flow without using an excessive pressure drop, the size of the powerless mixer may be increased. For example, a powerless mixing device with a diameter of 6 inches and a length of 60 inches may be used to allow a coolant flow of 1100 GPM with a pressure drop of 11 psi, and an additional low emulsification oil of 6-9 GPM The size of the oil injection pump can be increased.

  The benefits of directional lubricant delivery can be further realized by directing or focusing the lubricant delivery over the rolling gap and metal strip of the roller. Conventional rolling equipment typically includes a lubrication nozzle that typically discharges toward the roller rather than the roll gap, and further in accordance with embodiments of the present invention to direct the delivery of lubricant to the gap portion or gap. The device can be changed. For such rolling mills that lack gap spray and have cooling level control, a suitable header can be designed and installed that provides a discharge flow that is mixed with lubricant and directed toward the roll gap. FIG. 4 shows the additional introduction of gap spray into a continuous mill without gap spray, showing a plate that directs the discharge mixed with lubricant to the roll gap and changes to induce additional shielding. Lubricant is supplied directly through the header, delivered from a bulk lubricant tank through a series mixer as a dilute emulsion, or mixed with a gap spray coolant stream in one or more selected stacks. Can be delivered in a variety of ways, such as by any other means appropriate to

  In another aspect, the system may include two separate parts for the top and bottom rolls such that directional lubrication differs between the top surface of the sheet metal and the bottom surface of the sheet metal during rolling. This aspect can be used to improve the control of the surface quality as well as the friction between the top and bottom sides of the plank.

  Figures 5-7 demonstrate the advantages of using a pure emulsion, or a dilute emulsion with little or no emulsifier, in a rolling mill according to embodiments of the present invention. FIG. 5 shows the effect of nonionic emulsifier concentration at 50 ° C. on oil film formation (data source, Cambiella, A., Benito, JM, Pazos, C, Coca, J., Ratoi, M, Spikes, H. A., Tribol. Lett. 22, 53-65, 2006). 6 shows the effect of oil water concentration in the emulsion on oil film formation (data source: Yang, H., Schmid, SR, Reich, RA, Kasun, TJ, Tribol. Trans. 47, 123-129, 2004). Figure 7 shows the rolling load measured on a laboratory mill using genuine lubricants and their associated oil-in-water emulsions, and the distance from the diagonal to each data point is that of the pure oil and those Increases as the difference in anti-friction properties with the corresponding emulsion increases.

  By delivering a small amount of dilute emulsion (low emulsification lubricant containing oil / water combination with little or no emulsifier) compared to coolant type emulsion (cooling fluid) used in cooling supply lines in conventional rolling mills , Lubrication is significantly improved. In particular, such emulsions improve anti-friction properties and re-rolled surface quality when delivered into the roll gap of a selective roll stack. Inspection shows that as the amount of emulsifier decreases and the oil concentration increases as shown in FIGS. 5 and 6, the amount of oil delivered from the oil-in-water emulsion increases the friction between the flat disk and the ball. It shows that the contact increases.

  As shown in FIG. 7, the laboratory results show that hot rolling with genuine lubricants provides a stronger anti-friction effect than coolant-type emulsions and is unstable or dilute (ie, large oil droplets). ) Emulsions give better lubrication (oil release) than stable emulsions (small oil droplets). In addition, a small amount of lubricant (“filler”, “superfiller”, “filled lubricant”) is injected (“filled”) into the rolling coolant supply line without using an emulsifier. It has been demonstrated that the quality of the surface of the re-rolled sheet in a rolling mill improves rapidly. Thus, directional lubrication with dilute emulsions as provided by the present invention can improve surface quality more consistently during the rolling process. In addition, the hardware required to deliver directional lubricants into the coolant ("directional lubrication") to supply hot water or hot water with emulsifiers into the selective gap spray is facilitated Can be changed. This should result in an increase in friction, which can be performed perfectly in parallel rolling mills and can control differential friction such as between top and bottom rolls and between pedestals. it can. Thus, the principles of the present invention can be used to modify conventional rolling mills and provide the advantages and conveniences described herein.

  Various embodiments of the invention have been described as implementing various objects of the invention. It should be appreciated that these embodiments are merely illustrative for the principles of the present invention. Numerous modifications and adaptations will become readily apparent to those skilled in the art without departing from the spirit and scope of the invention as defined in the following claims.

Claims (20)

A sheet metal rolling apparatus, wherein the apparatus is
At least one rolling table having a set of rolls between which the metal strip is rolled to reduce its thickness, said set of rolls comprising a top roll and a bottom roll A set of lubrication gap nozzles suitable for discharging a lubricating fluid produced by mixing a cooling fluid and a filled lubricant at the inlet side of each of the top and bottom rolls of the table and the set of rolls A set of lubrication gap nozzles including one or more lubrication gap nozzles directed to the roll gap region of the set of rolls and the metal strip;
A set of cooling nozzles suitable for discharging cooling fluid onto the roll surface of the top roll above the gap spray and discharging the cooling fluid onto the roll surface of the bottom roll below the gap spray A set of cooling nozzles including one or more cooling nozzles;
A cooling fluid pump that pumps the cooling fluid through a piping system to the one or more cooling nozzles;
A lubricant pump for delivering a filled lubricant into the piping system, wherein the piping system is configured to lubricate the filling fluid before it is discharged through the one or more lubrication gap nozzles while the cooling fluid flows to the cooling nozzle. A lubricant pump configured to mix an agent with the cooling fluid to form the lubricating fluid;
A sheet metal rolling apparatus. The piping system includes a cooling portion and a lubricating portion;
The cooling portion fluidly couples the cooling fluid pump and the cooling nozzle;
The sheet metal rolling apparatus according to claim 1, wherein the lubrication portion fluidly couples the lubricant pump and the coolant pump and the gap lubrication nozzle.   The sheet metal rolling device according to claim 2, wherein the lubrication gap nozzle is configured such that the fluid discharged from the nozzle faces the roll gap where the pair of rolls contacts the metal strip.   The lubrication portion includes an in-line powerless mixer disposed between the valve and the lubrication nozzle, so that the cooling fluid and the lubricant are discharged for discharge through the lubrication nozzle. The sheet metal rolling apparatus according to claim 2 or 3, wherein the sheet metal rolling apparatus is mixed in the mixer so as to effect emulsification of a fluid and the lubricant.   A rolling mill header having a lubrication fluid chamber and a cooling fluid chamber separated from each other, wherein the lubrication fluid chamber is fluidly coupled to the lubrication nozzle and the cooling fluid chamber is fluidly coupled to the cooling nozzle; The sheet metal rolling device according to any one of claims 1 to 4, which is coupled.   The sheet metal rolling apparatus according to any one of claims 1 to 5, wherein the apparatus is suitable for hot rolling of an aluminum strip.   The sheet metal rolling apparatus according to any one of claims 1 to 6, wherein the cooling fluid includes water or a diluent and a dense water-in-oil emulsion, and the lubricant includes oil. The at least one rolling table is:
Two or more platforms each having a pair of rolls rolled between the metal strip after being rolled through the first roller table to reduce its thickness;
One or more additional sets of lubrication nozzles, each set of lubrication gap nozzles suitable for discharging lubricating fluid on the suction side of the set of rollers of one or more selected rolling mill tables. And each set of the lubrication nozzles includes one or more additional sets of lubrication nozzles coupled to both the lubricant pump and the cooling fluid pump through the piping system. The sheet metal rolling apparatus according to any one of 1 to 7.   The sheet metal rolling device according to any one of claims 1 to 8, wherein the lubricating nozzle delivers a gap spray.   10. The first set of lubrication nozzles comprises one or more fluid discharge nozzles for directing fluid discharged from the discharge nozzles toward void portions of the set of rollers. The sheet metal rolling apparatus according to any one of the above.   The piping system is configured such that the concentration of the lubricant and cooling fluid discharged from the cooling nozzle is different from the concentration of the lubricant and cooling fluid discharged from the set of lubrication gap nozzles. The sheet metal rolling apparatus according to any one of claims 1 to 10.   The sheet metal rolling according to any one of claims 1 to 11, wherein the piping system is configured such that a composition of the lubricant in the lubricating fluid is different from a composition of the lubricant in the cooling fluid. apparatus.   13. The piping, valve and liquid lubricant delivery system are configured according to any of claims 1-12, wherein the lubricating fluid is configured to include different concentrations and compositions of lubricating fluid on each mill base. The sheet metal rolling apparatus described. A sheet metal rolling method, the method comprising:
Rolling a metal strip between a set of rolls of metal rolling equipment;
Lubricating a contact surface between the rolled metal and each roll of the set of rolls with a lubricating fluid during rolling, wherein the lubricating fluid comprises a mixture of a cooling fluid and a filled lubricant. The cooling fluid and the filled lubricant are pumped into the piping system by a cooling fluid pump and a lubrication pump, respectively, and mixed in the piping system before being discharged through a set of lubrication gap nozzles;
Including methods.   15. The method of claim 14, further comprising mixing the lubricant and cooling fluid in the piping system in a powerless mixer to form a dilute emulsion of lubricant and cooling fluid. Rolling the metal strip between a set of rolls of one or more additional platforms of the metal rolling apparatus after rolling through a first platform;
Lubricating a contact surface between the rolled metal and each of the set of rolls of any selected or all rolling mill bases with a lubricating fluid during rolling;
The method according to claim 14 or 15, further comprising:   The method of claim 16, wherein the mixture of lubricant and cooling fluid discharged from the lubrication gap nozzle is the same on each mill base.   The method of claim 16, wherein the mixture of lubricant and cooling fluid discharged from the lubrication gap nozzle is different on each mill base. The apparatus includes at least two roll stacks each comprising a set of rollers and connected lubrication gap nozzles, and the piping includes a liquid lubricant source and the lubrication gap nozzles for each roll stack. Including a powerless mixer in between, the method comprising:
The method further comprises selectively lubricating the selected roll stack by injecting a liquid lubricant into the powerless mixer connected to the lubrication gap nozzle for the selected roll stack. Item 15. The method according to Item 14. The apparatus includes at least two roll stacks each having a set of rollers and an associated set of lubrication nozzles, each set of lubrication nozzles having a header, the method comprising:
15. The method of claim 14, further comprising selectively lubricating the selected roll stack by injecting a filled lubricant into the header of the set of lubrication nozzles connected to the selected roll stack. The method described.

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