EP2303480B1 - Verfahren und vorrichtung zum schmieren von walzen und eines walzbandes eines walzgerüsts - Google Patents

Verfahren und vorrichtung zum schmieren von walzen und eines walzbandes eines walzgerüsts Download PDF

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Publication number
EP2303480B1
EP2303480B1 EP09768906.1A EP09768906A EP2303480B1 EP 2303480 B1 EP2303480 B1 EP 2303480B1 EP 09768906 A EP09768906 A EP 09768906A EP 2303480 B1 EP2303480 B1 EP 2303480B1
Authority
EP
European Patent Office
Prior art keywords
lubricant
water
mixture
gas
strip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP09768906.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2303480A2 (de
Inventor
Hartmut Pawelski
Hans-Peter Richter
Jürgen Seidel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
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SMS Siemag AG
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Filing date
Publication date
Application filed by SMS Siemag AG filed Critical SMS Siemag AG
Publication of EP2303480A2 publication Critical patent/EP2303480A2/de
Application granted granted Critical
Publication of EP2303480B1 publication Critical patent/EP2303480B1/de
Active legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0239—Lubricating
    • B21B45/0245—Lubricating devices
    • B21B45/0248—Lubricating devices using liquid lubricants, e.g. for sections, for tubes
    • B21B45/0251—Lubricating devices using liquid lubricants, e.g. for sections, for tubes for strips, sheets, or plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • 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 and conveyed between these 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.
  • WO 03 002277 A1 From the WO 03 002277 A1 are a method and apparatus for cooling and / or lubricating rollers, in particular of the work rolls, a rolling stand known in which water in the form of sprays as a cooling medium and oil, an oil-air mixture, an oil-water mixture, a Oil-water-air mixture or fat mixtures can be 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 by a method having the features of claim 1.
  • 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.
  • the lubricating effect should be optimized and the lubrication effect be adjustable.
  • oil-water dispersions oil-water emulsions, oil-free water-miscible lubricants, oil-air mixtures or oil-water-air mixtures are used as lubricants.
  • 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.
  • a gas in particular atomized by means of air
  • 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 2-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, and the device comprises control devices, in particular control valves, for determining the amount of ceremoniessprühenden on the at least one roller and / or the rolled strip by means of spray devices mixture.
  • 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 control devices, in particular control valves, for determining the amount of ceremoniessprühenden on the at least one roller and / or the rolled strip by means of spray devices mixture
  • 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 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.
  • a rolling device 1 ( Fig. 1 ) comprises two work rolls 2, 3, which are supported between two support rolls 4, 5 and a rolled strip 6 (FIG. Fig. 3 ) roll.
  • 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 deliver lubricants downstream of the width of the rolled strip 6 to spray nozzles 14 arranged downstream of the flow direction and designed as 2-substance mixing nozzles.
  • 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.
  • 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.
  • the control valves 13 are provided.
  • the lubricant such as oil, and air are first supplied via separate lines 7, 9, 15 and then applied via 3-nozzle nozzles designed as spray nozzles 14 and 17 on the upper work roll 2, wherein the mixing and atomizing the Fluids form a unit in the spray nozzles 17.
  • control devices which individually supply the respective fluid to the individual atomizing nozzles 17 or to a group of atomizing nozzles regulate.
  • 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 versions ( Fig. 1 to 4 ) analogous embodiments for supplying a lubricant-water-air mixture to the lower work roll 3 or on the upper side of the rolled strip 6 are provided or can be provided.
  • An atomizing nozzle 17 ( Fig. 5 ) is designed as an internal mixer-pressure mixing nozzle with an inner space 18, fed in the one hand via a supply line 19 water and two lubricants and mixed as needed by means of eg turbulence sheets 36 or pipe constriction 37. 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.
  • atomizing nozzles 17 preferably two or more rows 24, 25 (FIG. Fig. 6 ) of atomizing nozzles 17 with respect to a roller, for example the work roll 2, or with respect to the rolled strip, in which the atomizing nozzles 17 are preferably offset from one another.
  • a 1-row 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 atomizer nozzle 14 over the entire bandwidth.
  • control devices 26 Fig. 7
  • the overall effect of lubrication can be additionally influenced.
  • at least one of 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 mixing block 27 From the lines 7 and 15, first the lubricant and air are brought together. 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 meet only 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-fluid nozzle 31 which is designed as an internal mixer with an interior 32
  • water and oil are first introduced together into the interior 32 via a feed line 33 and separately the air.
  • turbulence plates 34 or a venturi are mounted to ensure a mixing of the media.
  • a 3-material nozzle 35 ( Fig. 11 ) also has an inner space 32, in the separately, the media oil, water and air via lines 7, 8 and 15 are supplied.
  • 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).
  • 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 (not shown here) evaluation device.
  • signals for the regulation or control of the atomizing nozzles 14 and control valves 13 for dispensing adapted amounts of lubricant to the work roll 2 are generated over the bandwidth.
  • 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.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Nozzles (AREA)
EP09768906.1A 2008-06-18 2009-06-09 Verfahren und vorrichtung zum schmieren von walzen und eines walzbandes eines walzgerüsts Active EP2303480B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102008028620 2008-06-18
DE102008034099 2008-07-21
DE102008050392A DE102008050392A1 (de) 2008-06-18 2008-10-02 Verfahren und Vorrichtung zum Schmieren von Walzen und eines Walzbandes eines Walzgerüsts
PCT/EP2009/004138 WO2009156057A2 (de) 2008-06-18 2009-06-09 Verfahren und vorrichtung zum schmieren von walzen und eines walzbandes eines walzgerüsts

Publications (2)

Publication Number Publication Date
EP2303480A2 EP2303480A2 (de) 2011-04-06
EP2303480B1 true EP2303480B1 (de) 2013-06-05

Family

ID=41335046

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09768906.1A Active EP2303480B1 (de) 2008-06-18 2009-06-09 Verfahren und vorrichtung zum schmieren von walzen und eines walzbandes eines walzgerüsts

Country Status (15)

Country Link
US (2) US9254513B2 (ja)
EP (1) EP2303480B1 (ja)
JP (2) JP2011524257A (ja)
KR (1) KR101249255B1 (ja)
CN (1) CN102083559A (ja)
AU (1) AU2009262567B2 (ja)
BR (1) BRPI0915298A8 (ja)
CA (1) CA2728197C (ja)
DE (1) DE102008050392A1 (ja)
MX (1) MX2010013881A (ja)
RU (1) RU2463118C2 (ja)
TW (2) TW201012563A (ja)
UA (1) UA100275C2 (ja)
WO (1) WO2009156057A2 (ja)
ZA (1) ZA201008619B (ja)

Cited By (1)

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TW201012563A (en) 2010-04-01
AU2009262567A1 (en) 2009-12-30
KR20110011713A (ko) 2011-02-08
US20140060135A1 (en) 2014-03-06
CA2728197C (en) 2013-10-15
BRPI0915298A8 (pt) 2018-10-23
UA100275C2 (uk) 2012-12-10
AU2009262567B2 (en) 2012-06-14
MX2010013881A (es) 2011-01-20
DE102008050392A1 (de) 2009-12-24
KR101249255B1 (ko) 2013-04-09
JP2014061550A (ja) 2014-04-10
WO2009156057A2 (de) 2009-12-30
TWM513070U (zh) 2015-12-01
US20110111124A1 (en) 2011-05-12
BRPI0915298A2 (pt) 2016-07-05
ZA201008619B (en) 2011-08-31
WO2009156057A3 (de) 2010-02-18
US9254513B2 (en) 2016-02-09
RU2011101567A (ru) 2012-07-27
CN102083559A (zh) 2011-06-01
RU2463118C2 (ru) 2012-10-10

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