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
  • B21B45/0239—Lubricating
  • B21B45/0245—Lubricating devices
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
  • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
  • B21B37/30—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control
  • B21B37/32—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control by cooling, heating or lubricating the rolls
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
  • B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips
• • 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
• • 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
  • B21B45/0263—Lubricating devices using solid lubricants

Definitions

• the invention relates to a method for lubricating rolls, in particular of work rolls of a roll stand and rolled rolled between them and rolled strip, wherein a lubricant-gas mixture, a lubricant-water-gas mixture, a lubricant-water mixture and / or a grease-medium mixture is applied to the rollers or the rolled strip on the upstream side.
• the rolling stand comprises a plurality of mutually supporting rollers, such as a work roll, which comes directly into contact with the rolling stock and in turn rolls on a usually larger support roll or an intermediate roll.
• Roll-gap lubrication systems are integrated in many hot rolling mills for rolling a metal strip. These are used to improve the surface quality of the work roll and the strip and now belong to the usual equipment of a rolling mill on which high-quality tapes are to be produced.
• the system in which water as a carrier medium is mixed together with oil and applied to the rolled strip or the working or backup roll is widely used.
• lubrication is common.
• lubricant is applied to the rolled strip and / or the work roll and / or injected into the roll gap.
• the mixture of oil and water takes place far away from the mill stand.
• an emulsion is used, which is prepared in a complex process in a circulation system, cleaned and fed back to the lubrication system.
• BESTATIGUNGSKOPIE WO 03 002277 A1 discloses a method and a device for cooling and / or lubricating rolls, in particular of the work rolls, of a roll stand, in which water in the form of spray jets as cooling medium and oil, an oil-air mixture, an oil-water mixture, an oil-water-air mixture or fat mixtures are used as a lubricant.
• a combined use of supercooling of the belt and roll surface and the roller lubrication on the scaffold inlet side is proposed, in which the two media - water and lubricant - the rolls or the strip fed separately and to different application sites of the roll surface be applied. Separate feeds to the spray bars are provided for water and the lubricant respectively.
• this object is achieved in the aforementioned method in that the mixture is processed by means of at least one mixing device in the area in front of the rolling stand.
• the aim of the new lubrication method is to produce the lubricant shortly before use or application, similar to hot rolling, and thus to avoid expensive preparation in a closed circuit.
• it also has the goal to minimize the amount of lubricant used.
• the same goal also exists when using the lubricating method according to the invention during hot rolling. When reducing the amount of lubricant at the same time the lubricating effect should be optimized and the lubrication effect be adjustable.
• the lubricants used are, for example, oil-water dispersions, oil-water emulsions, oil-free water-miscible lubricants, oil-air mixtures or oil-water-air mixtures.
• the media can be sprayed in 2-, 3-, or 4-fluid nozzles.
• oil and water are mixed with air just before spraying. This way, even the smallest amounts of oil can be applied to the roll surfaces or the rolled strip.
• mixing oil and water has the advantage, unlike using pure oil, that there is no risk of fire.
• the advantage of the new lubrication process in the cold rolling process is that the oil concentration in the lubricant can be changed very quickly and flexibly. This allows the lubricant to be optimally adjusted to different materials to be rolled, to different belt speeds, to changing approvals and to the respective rolling stand. Furthermore, different oils and lubricating media for different applications can be provided.
• water and at least one lubricant are conveyed via separate supply lines to a mixer and mixed therein to form a water-lubricant dispersion or emulsion.
• the water-lubricant dispersion or emulsion is atomized by means of a gas, in particular by means of air, in atomizing nozzles and applied to the at least one work roll and / or the rolled strip.
• 3-fluid or 4-fluid mixing or atomizing nozzles are used, in which the water, the at least one lubricant and the air are mixed. It is understood that for the purposes of the invention, instead of air, another gas or gas mixture can be used.
• the at least one lubricant is first mixed with the water in an inflow line to form a mixture, and then the mixture in the interior of the 3-material or 4-substance mixing nozzle is mixed with the gas.
• the water, the at least one lubricant and the gas in the interior of the 3-material or 4-component mixing nozzle are mixed.
• the lubricant-gas mixture, the lubricant-water-gas mixture, the lubricant-water mixture and / or the fat-medium mixture is distributed over the entire width of at least one of the work rolls and / or the rolled strip.
• the amount of water, the at least one lubricant, the gas, the lubricant-gas mixture, the lubricant-water-gas mixture, the lubricant-water mixture and / or the grease-media mixture is distributed by means of control valves over the width of at least one of the work rolls and / or the rolled strip.
• the amount and / or pressure of the at least one lubricant, the water, the lubricant-water mixture, the lubricant-gas mixture and / or the grease-media mixture by means of the control valves and / or in flow meters, pressure regulators and / or in mixing blocks over the width of at least one of the work rolls and / or the rolled strip is controlled.
• the at least one lubricant, water and gas are mixed in a 3-material nozzle, wherein the amount of the lubricant is regulated in sections over the width of at least one of the work rolls and / or the rolled strip and that pressure and / or Volume of gas and water are regulated.
• the mixing operation is realized by mixing the at least one lubricant and the gas in a mixing block and then adding water to 2-component mixing nozzles.
• the water can be mixed outside each of an inner nozzle tube of the two-component mixing nozzles.
• the at least one lubricant is mixed with the gas, in particular in a mixing block, and sprayed by means of nozzles on at least one of the rollers and / or the rolled strip, while the side of the nozzle water is sprayed.
• the supply of the at least one lubricant is controlled in zones over the width by means of a flatness control.
• the invention also relates to a device for lubricating at least one roll and / or a rolled strip rolled between the rolls in a roll stand.
• the device is characterized in that the device comprises at least one mixing block and / or multicomponent mixing devices, in particular atomizing nozzles, for mixing water, gas, at least one lubricant, in particular an oil, to a lubricant-gas mixture, a lubricant water Gas mixture, a lubricant-water mixture.
• the device comprises regulating devices, in particular control valves, for determining the amount of the mixture to be sprayed onto the at least one roller and / or the rolled strip by means of spraying devices.
• control devices are arranged in zones over the width of the at least one roller or the rolled strip. This can also provide flow meter and pressure regulator.
• the multi-component mixing devices are designed either as internal or external mixers. Preferably, they comprise a turbulence plate or a venturi.
• water spray bars are provided above and / or below spray devices for spraying a lubricant-containing mixture onto the at least one roller and / or the rolled plate.
• This has a fire protection effect in the case of hot rolling. Flammable oil or grease is shielded by a water spray curtain and can not heat up and cause a fire.
• the device can be advantageously with a control device for controlling the flatness of the rolled strip under evaluation of signals a flatness measuring device, in particular a flatness measuring roll, equip.
• the flatness measuring device preferably comprises a measuring roller which generates signals corresponding to the flatness of the rolled strip and forwards them to the spraying devices for adjusting the quantities or concentrations of the at least one lubricant.
• the flatness of the rolled strip can also be considered in a higher order by evaluating the signals of the flatness measuring roller, and measures can be taken for correction, for example by changing the lubricant quantities or concentrations.
• the spray devices can be arranged in two rows substantially parallel to the axis of the roller, in particular offset from one another, in order to ensure sufficient lubrication of the roller surface or the rolled strip even in the event of failure of individual spray nozzles.
• the invention also relates to a rolling stand in which a device described above for lubricating a roll and / or the rolled strip is used.
• FIG. 1 shows a rolling device with an oil-water-air lubrication system with a width-variable lubricant supply, in which the lubricant is sprayed onto the upper work roll,
• 2 shows a rolling device with an oil-water-air lubrication system, in which the lubricant is sprayed in the same amount across the width of the upper work roll
• 3 shows a rolling device with an oil-water-air lubrication system with a width-variable lubricant supply, in which the lubricant is sprayed onto the underside of the rolled strip
• FIG. 4 shows a rolling device with an oil-water-air lubrication system with a plurality of 3-fluid mixing nozzles with gas-liquid atomizers, in which the lubricant is sprayed onto the upper work roll,
• FIG. 5 shows an embodiment of a 3- or 4-material mixing nozzle for mixing water, lubricant and gas, as used for example in the rolling apparatus according to FIG. 3, FIG.
• FIG. 6 shows a double-row arrangement of mixing nozzles for applying lubricant to a roll or a rolled strip
• Fig. 7 shows a rolling device with an oil-water-air lubrication system with a plurality of 3-fluid mixing nozzles with gas-liquid atomizers and with the 3-fluid mixing nozzles respectively associated control valves for controlling the amount of lubricant, wherein the lubricant the upper work roll is sprayed,
• FIG. 8 shows a rolling apparatus with an oil-water-air lubrication system wherein lubricant and gas are mixed in a mixing block and water is added in a plurality of 2-component mixing nozzles and the lubricant is sprayed onto the upper work roll.
• FIG. 9 shows the mixing block according to FIG. 8 in conjunction with a 2-material
• 10 is a three-component mixing nozzle for mixing water, lubricant and gas with a mixture of the liquid media before entering the media room in longitudinal section,
• FIG. 11 shows a further 3-material nozzle for mixing water, lubricant and gas with a mixture of the liquid media before entering the media space in a longitudinal section, wherein all the media mix in the media space
• FIG. 12 shows a rolling device with an oil-gas lubrication system, wherein
• Lubricant and gas are mixed in a mixing block, the lubricant is sprayed on both work rolls and at the same time water spray bars are provided as fire protection devices, and
• FIG. 13 shows the rolling device according to FIG. 7, wherein additionally a flatness measuring roller and a flatness control device are present.
• a rolling apparatus 1 ( Figure 1) comprises two work rolls 2, 3 which are supported between two back-up rolls 4, 5 and roll a rolled strip 6 ( Figure 3).
• a lubricant in particular a first and a second oil, or other oils and water are first supplied via separate supply lines 7, 8 and 9.
• First the two oils are mixed together. Alternatively, only one or the other oil is used.
• the desired amounts of water and the two oils are adjusted by means of metering pumps 10, 11 and pumped to a mixer 12. Behind the mixer 12, this results in a dispersion or emulsion of the merged liquids.
• the distance between the mixer 12 and downstream in the flow direction control valves 13 is preferably very small, or constitute a unit to avoid segregation.
• the control valves 13 are distributed over the entire width of the upper work roll 2. If longer piping is unavoidable, turbulence plates (mixers) are provided in the line at regular intervals.
• the pipe cross section is preferably chosen as small as possible in order to realize the highest possible flow velocity and thus a short transport time.
• the control valves 13 In order to be able to set a lubricant supply across the width of the work roll 2 and also dependent on the width of the processed rolled strip 6, the control valves 13 according to the width of the rolled strip 6 lubricant on downstream in the flow direction and designed as a 2-component mixing nozzles atomizer nozzles 14 from.
• the atomizer 14 is Added to the lubricant-water mixture air, which is supplied via a line 15 with a pressure regulator 16 for adjusting the air pressure.
• the adjustment of the amounts of lubricant or oil as well as of the quantities of water takes place either via a computer model and / or via a control device which takes into account the different lubricating properties as a function of the strip material to be rolled, the speed, the decrease, the temperatures and other parameters.
• the controls of the control valves 13 and the quantities pumped by the metering pumps 10, 11 are matched.
• the control device determines the lubricant concentrations or the types of lubricant and also performs a profile and flatness control of the rolled strip 6 by.
• Unevenness of the rolled strip 6 is then compensated by a suitable supply of the lubricant amounts or by changing other parameters.
• the rolling force level can be influenced by changing the oil quantity, the type of oil, the oil concentration in the water or / and the oil mixing ratio.
• no control valves 13 are present.
• the flow rate of the atomizing nozzles 14 is set manually or results from the setting of the metering pump.
• the lubricant-water-air mixture is applied directly to the underside of the rolled strip 6. Also in this case, the control valves 13 are provided.
• water, the lubricant, for example oil, and air are first supplied via separate lines 7, 9, 15 and then to the upper work roll 2 via atomizing nozzles 14 and 17 designed as 3-material nozzles applied, wherein the mixing and atomizing of the fluids form a unit in the atomizing nozzles 17.
• control devices which individually supply the respective fluid to the individual atomizing nozzles 17 or to a group of atomizing nozzles. regulate overflow nozzles.
• all the individual control devices are integrated into a control system which determines the volume and the mixing ratio of the fluids which are discharged from the atomizer nozzles 17 onto the work roll 2 or the rolled sheet 6. It is understood that in all embodiments (FIGS. 1 to 4) analogous configurations for supplying a lubricant-water-air mixture to the lower work roll 3 or to the upper side of the rolled strip 6 are provided or can be provided.
• An atomizing nozzle 17 ( Figure 5) is designed as an internal mixer-pressure mixing nozzle with an interior 18, in the one hand supplied via a supply line 19 water and two lubricants and if necessary by means of e.g. Turbulence sheets 36 or pipe constriction 37 are mixed. The mixing process of the liquids takes place shortly before the atomization. Mixer and nozzle are here a unit. Via two lines 20, 21, the lubricant is first introduced into the supply line 19 immediately before its exit into the interior 18. A gas, in particular air, enters the interior 18 via another feed line 22 and is swirled there with the mixture of water and the two lubricants.
• the mixture leaves a conical nozzle opening 23 and impinges on the surface of a roll or rolled strip 6.
• the lubricant for example, oil
• a plurality of lubricants is the most important component, it is within the meaning of the invention also possible to regulate only the amount of oil individually per spray nozzle 17 and the other components in groups, so for example over a larger portion of the width of a Roller and / or rolled strip 6, to regulate.
• the application of the lubricant or lubricants can be done without the use of water using only compressed air. In this case, a 2-fluid nozzle is used.
• a nozzle bar can be used, the nozzles have a large spray angle, so that a double overlap arises. That is, if a nozzle fails, the adjacent nozzles will cover that area.
• control devices 26 (FIG. 7) with which the inflow of the lubricant is controlled individually per atomizing nozzle 14 over the entire bandwidth.
• control devices 26 By modifying the amount of water and air, the overall effect of lubrication can be additionally influenced.
• the work rolls 2, 3 is supplied with lubricant;
• the rolled strip 6 is preferably supplied with the lubricant.
• lubricant and air are brought together in a mixing block 27.
• the air carries the lubricant to the atomizing nozzles 14.
• Each of the nozzles 14 is fed individually.
• the water is introduced separately into the nozzles 14.
• the lubricant and air are first combined from the lines 7 and 15. Then, the mixture is combined via a line 28 of a 2-material nozzle 29 with the water supplied from the line 8.
• the 2-material nozzle 29 is designed as an external mixer. This means that the lubricant-air mixture and the water only meet at a nozzle outlet 30.
• the mixing is made possible by spraying two hollow cones formed by the fluids.
• the advantage of this 2-material nozzle 29 is that saponification is excluded, since lubricant and water come into contact only at the nozzle outlet 30 with each other. The supply of water can be switched off to create a pure lubricant-air lubrication.
• a 2-material nozzle 31 which is designed as an internal mixer with an interior space 32
• water and oil are first jointly introduced into the interior space 32 via a feed line 33 and separately the air.
• turbulence plates 34 or a Venturi nozzle are mounted to ensure a mixing of the media.
• a 3-material nozzle 35 (FIG. 11) likewise has an inner space 32 into which the media oil, water and air are supplied separately via lines 7, 8 and 15. The liquid media are thus mixed only in the interior 32, atomized and atomized by the air.
• shielding walls 40, 41 are provided around the oil-air mist generated by the atomizing nozzles 14. The oil-air mist can be sucked to the outside.
• the shielding walls 40, 41 as well as the nozzle bars 14 are made pivotable to improve the shielding and to place the nozzles close to the roll.
• a comparable suction is also provided for the lubricant application on the rolled strip (during cold rolling).
• the invention is characterized a flatness measuring roller 42 (FIG. 13) or another non-contact (optical) flatness measurement for determining unevenness of the rolled strip 6, which transmits signals via a signal line 43 to an evaluation device (not shown here).
• a signal line 43 to an evaluation device (not shown here).
• the atomizing nozzles 14 and control valves 13 for dispensing adapted amounts of lubricant to the work roll 2 over the bandwidth generated.
• the amount of lubricant delivered per zone or the lubricant concentration can influence the band flatness of parabolic or higher order. It is understood that a corresponding regulation with respect to the lower work roll 3 can also be applied.
• the atomizing nozzles 14 may also spray the lubricant directly onto the rolled strip 6 to affect the band flatness and tape tension distribution over the belt width.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Metal Rolling (AREA)
• Nozzles (AREA)

Priority Applications (12)

Applications Claiming Priority (6)

Related Child Applications (2)

Publications (2)

Family

ID=41335046

Family Applications (1)

Country Status (15)

Cited By (2)

Families Citing this family (32)

Family Cites Families (52)

• 2008
  • 2008-10-02 DE DE102008050392A patent/DE102008050392A1/de not_active Withdrawn
• 2009
  • 2009-06-09 EP EP09768906.1A patent/EP2303480B1/de active Active
  • 2009-06-09 TW TW102222435U patent/TWM513070U/zh not_active IP Right Cessation
  • 2009-06-09 WO PCT/EP2009/004138 patent/WO2009156057A2/de not_active Ceased
  • 2009-06-09 CN CN2009801231161A patent/CN102083559A/zh active Pending
  • 2009-06-09 BR BRPI0915298A patent/BRPI0915298A8/pt not_active Application Discontinuation
  • 2009-06-09 KR KR1020107029233A patent/KR101249255B1/ko active Active
  • 2009-06-09 JP JP2011513919A patent/JP2011524257A/ja active Pending
  • 2009-06-09 TW TW098119138A patent/TW201012563A/zh unknown
  • 2009-06-09 MX MX2010013881A patent/MX2010013881A/es active IP Right Grant
  • 2009-06-09 US US13/000,281 patent/US9254513B2/en not_active Expired - Fee Related
  • 2009-06-09 AU AU2009262567A patent/AU2009262567B2/en not_active Ceased
  • 2009-06-09 RU RU2011101567/02A patent/RU2463118C2/ru not_active IP Right Cessation
  • 2009-06-09 CA CA2728197A patent/CA2728197C/en not_active Expired - Fee Related
  • 2009-09-06 UA UAA201100446A patent/UA100275C2/uk unknown
• 2010
  • 2010-12-01 ZA ZA2010/08619A patent/ZA201008619B/en unknown
• 2013
  • 2013-11-13 US US14/079,244 patent/US20140060135A1/en not_active Abandoned
  • 2013-12-04 JP JP2013251058A patent/JP2014061550A/ja active Pending

Also Published As

Similar Documents

Legal Events