EP3546080A1 - Walzenreinigungsverfahren mit walzenreinigungsvorrichtung - Google Patents

Walzenreinigungsverfahren mit walzenreinigungsvorrichtung Download PDF

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Publication number
EP3546080A1
EP3546080A1 EP18164316.4A EP18164316A EP3546080A1 EP 3546080 A1 EP3546080 A1 EP 3546080A1 EP 18164316 A EP18164316 A EP 18164316A EP 3546080 A1 EP3546080 A1 EP 3546080A1
Authority
EP
European Patent Office
Prior art keywords
roller
washing
washing liquid
cleaning
roll
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.)
Pending
Application number
EP18164316.4A
Other languages
German (de)
English (en)
French (fr)
Inventor
Kathrin Eckhard
Olaf Güssgen
Frank Hirschmann
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.)
Speira GmbH
Original Assignee
Hydro Aluminium Rolled Products GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hydro Aluminium Rolled Products GmbH filed Critical Hydro Aluminium Rolled Products GmbH
Priority to EP18164316.4A priority Critical patent/EP3546080A1/de
Priority to PCT/EP2019/057728 priority patent/WO2019185720A2/de
Priority to CN201980022717.7A priority patent/CN111971129B/zh
Priority to JP2020551539A priority patent/JP6932858B2/ja
Priority to EP19713043.8A priority patent/EP3774098A2/de
Publication of EP3546080A1 publication Critical patent/EP3546080A1/de
Priority to US17/032,870 priority patent/US11945008B2/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B28/00—Maintaining rolls or rolling equipment in effective condition
    • B21B28/02—Maintaining rolls in effective condition, e.g. reconditioning
    • B21B28/04—Maintaining rolls in effective condition, e.g. reconditioning while in use, e.g. polishing or grinding while the rolls are in their stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
    • B08B1/12—Brushes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/04—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by a combination of operations
    • 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
    • B21B45/0269—Cleaning
    • B21B45/0275—Cleaning devices

Definitions

  • This invention relates to the cleaning of rolls used for steel and aluminum sheet processing to remove contaminants such as run-in traces of the processed metal webs and other types of contaminants on the roll surface.
  • the invention also relates to a device for cleaning rollers.
  • rollers In steel and aluminum processing, a series of rollers is used. These are steel and stainless steel rollers, which may also be chrome-plated. Equally possible is the use of rollers with ceramic surfaces. Rollers in steel and aluminum processing are used in particular for rolling, texturing or tempering sheet metal or metal strips. Since large forces are required for these industrial rolling processes, the rolls usually have a high weight.
  • EDT Electro Discharge Texturing
  • the surface of the roll is roughened by spark erosion. This is done by passing the work roll past an electrode in a tank containing a dielectric. By sparking small craters are beaten into the roll surface.
  • the chromium plating also a further process step to restore (manifestation) of the desired roll surface required.
  • the manifestation of the appropriate surface texture on a roll is - also logistically - complex and expensive, so that could be saved with an extension of the revision intervals for significant costs.
  • the invention is thus based on the object to provide a method and an apparatus with which a used, cleaning or in need of regeneration production roller as possible in the own production facility and by a simpler less time-consuming process than the mechanical treatment by grinding can be renewed.
  • This object is achieved according to a first teaching of the invention by a method for the chemical cleaning of metal rollers, in which one cleans the roll surface of a work roll with an aqueous alkali metal or alkaline earth metal hydroxide washing liquid or an acidic washing liquid, rinsed with water and dried.
  • a method for the chemical cleaning of metal rollers in which one cleans the roll surface of a work roll with an aqueous alkali metal or alkaline earth metal hydroxide washing liquid or an acidic washing liquid, rinsed with water and dried.
  • a device for cleaning rolls used for metal strip processing preferably steel and aluminum strip processing
  • the device comprising a washing rack adapted to position a roll to be cleaned, and at least one means for applying at least one washing liquid to the roll surface of the roll to be cleaned.
  • the device according to the invention can be set up in particular for carrying out and / or controlling the method according to the first teaching of the invention.
  • the method according to the invention and the use of the device according to the invention considerably lengthen the intervals between mechanical reworking of the rolls by grinding.
  • the flexibility in the production sequence is increased because run-in marks on rollers by the inventive method and can be easily removed by the device according to the invention and the roller can be quickly returned to a state that allows the processing of wider bands.
  • the service life of a roller is also prolonged overall.
  • the method and apparatus of the present invention are also effective in removing markings from impacts and rolled wrinkles. Mechanical damage to a roll surface can not be corrected by the method according to the invention.
  • the surface of work rolls of any kind can be cleaned in metalworking.
  • the rolls to be cleaned may be rolls with a textured surface or rolls with a sanded surface.
  • Impurities to be removed from the roll surface include run-in traces, rolling oil residue, rolling emulsion residues, roll surface markings from impacts, and other contaminants.
  • the surface structure of the roller to be cleaned should not be damaged.
  • a first and a second washing liquid are preferably an alkali metal hydroxide solution or alkaline earth metal hydroxide solution.
  • the first and second washing liquids are an aqueous dilute alkali metal hydroxide solution, more preferably a sodium hydroxide solution.
  • the first and the second washing liquid are used successively for cleaning a roll.
  • the first washing liquid may have a higher concentration of alkali metal hydroxide or alkaline earth metal hydroxide than the second washing liquid.
  • the alkali metal hydroxide concentration of the first washing liquid may be 2 to 4 wt .-%, based on the mass of the washing liquid.
  • the alkali metal hydroxide concentration of the second washing liquid may be, for example, 0.3 to 1% by weight, based on the mass of the washing liquid.
  • the roll is rinsed with the alkali metal hydroxide solution or solutions with water (third washing liquid).
  • This treatment serves to remove the washing liquid containing alkali metal hydroxide.
  • the water used is preferably a deionized water (deionized water).
  • demineralized water has been passed through desalting salt three times through an ion exchanger to purify it.
  • the roller may be treated with water with a lower alkanol having 1, 2, 3 or 4 carbon atoms or the mixture of a lower alkanol with water (fourth washing liquid), thereby optionally final impurities on the roll surface and / or water to remove.
  • the lower alkanol is preferably an alkanol having two or three carbon atoms, such as ethanol, isopropanol, propanol or mixtures thereof. Particular preference is given to using isopropanol as the fourth washing liquid.
  • the alkali metal hydroxide-containing washing liquids may preferably contain further ingredients such as a surfactant, a degreasing agent and / or other substances. These other ingredients may be selected depending on the type and amount of contamination in the washing liquid.
  • Suitable surfactants are, for example, nonionic and anionic surfactants. Their concentration in the washing solution can be from 1 to 5% by weight, based on the mass of the washing liquid.
  • complexing degreasing agents are preferably used.
  • Complexing degreasing agents prevent the formation of an emulsion.
  • Suitable complexing degreasing agents are, for example, polyphosphates, gluconates, oxalates and citrates.
  • the concentration of the degreasing agent in the washing solution may be up to 3% by weight, based on the mass of the washing liquid.
  • the alkaline cleaning process can be used to clean rollers that have been used to process aluminum belts or steel belts.
  • This alkaline roll cleaning method is advantageous for steel rolls because the roll surface is passivated by alkali.
  • the washing liquid is a mineral acid or carboxylic acid
  • One or more acidic wash fluids may be used in the cleaning of steel strip processing rolls, including high and low alloy steel strip, and for machining copper, titanium or magnesium strip or alloys of these metals.
  • nitric acid and sulfuric acid may preferably be used in the acidic scrubbing liquid.
  • carboxylic acid formic acid and acetic acid are preferably used.
  • first a first acidic and then a second acidic washing liquid can be used.
  • the first acidic wash liquid may have a higher acid concentration than the second acidic wash liquid.
  • the concentration of acid in the first acidic washing liquid may be from 2 to 4% by weight, based on the mass of the first acidic washing liquid.
  • the concentration of acid in the second acidic washing liquid may be, for example, 0.3 to 1% by weight, based on the mass of the second acidic washing liquid.
  • the acidic washing liquids may contain the same additives in the same amount as in the first and second washing liquids in the alkaline roll cleaning process.
  • the third and the fourth washing liquids in the acidic roller cleaning method are the same as those in the alkaline roller cleaning method, respectively.
  • the first and second washing liquids or the first and second acidic washing liquids dissolve the abrasion or other reaction products from the production process on the roll surface.
  • the roll material is essentially not attacked or impaired.
  • the first and second washing liquids used according to the invention are preferably washing solutions.
  • the cleaning of the rolls by the process according to the invention can in principle be done by hand.
  • the washing solutions by hand, with a cloth, a paint roller or other suitable device can be applied to the roll surface or sprayed.
  • the roller to be cleaned can be turned by hand or by machine.
  • the roller may also be partially or completely submerged in a basin with washing solution and thereby rotated.
  • the roller is only partially submerged in a basin, so that only part of the roller surface is immersed in the washing liquid.
  • One or more cylindrical brushes, rubberized pressure rollers, nonwoven rolls or nozzle bars can intensify the cleaning of the roll surface. These can also be used in combination.
  • the apparatus according to the second teaching of the invention comprises a washing rack adapted for positioning a roller to be cleaned.
  • the washing rack is preferably adapted to rotatably support the roller along its own axis.
  • the roller may also be positioned relative to the device via the washing rack, for example, the roller may be adjustable in height and / or pivotably mounted in the washing rack.
  • the roller is positioned or mounted on the bearing sections, on which the roller is also stored when used in metalworking.
  • Adapters for positioning different types of rolls may be provided.
  • the rolls can be used with their own storage from the production process, the so-called building pieces. This has the advantage that the time for the removal and re-mounting of the building pieces can be saved. But it can also be provided with their own bearings for the rollers, the wash rack.
  • the means for applying at least one washing solution of the device according to the second teaching of the invention is in particular adapted for sprinkling and / or spraying the roll surface with a washing solution.
  • the means for applying at least one washing liquid may also comprise at least one washing solution itself, in particular an aqueous alkali metal hydroxide or alkaline earth metal hydroxide washing solution.
  • One or more wash liquids may be provided in containers.
  • the means for applying at least one washing solution comprises at least one nozzle and / or at least one scoop roller.
  • a nozzle may be arranged for spraying the roll surface, wherein in particular the roll is rotatably mounted, so that by rotation of the roll, the circumference of the roll surface can be sprayed.
  • Several nozzles can be arranged in the direction of the axis of the roller, so that the roller surface is applied as uniformly as possible along the axis via the nozzles with a washing solution.
  • one or more nozzles can be arranged to be movable along the roll axis.
  • the device may include at least one pump to pressurize the nozzle.
  • a scoop roller may in particular be adapted to apply a wash solution to the roll surface via contact between scoop roller and roller surface.
  • roller and scoop roller are arranged to each other so that roller and scoop roller can roll on each other.
  • the roller surface can thus be acted upon along the circumference with a washing solution.
  • means which can drive or rotate a roller in the washing rack and / or a scoop roller, for example at least one electric motor for rotating the roller and / or the scoop roller.
  • a scoop roller can be mounted via a spring pressure mechanism, hydraulically or pneumatically, so that the scoop roller is brought into contact with the roller surface with a defined, in particular an adjustable pressure.
  • a scoop roller in addition to providing a wash solution, may also provide mechanical action on the roller surface, such as a brushing action to aid cleaning.
  • the surface of the scoop roller may comprise a material which improves the application of a washing solution and / or the mechanical action.
  • a scoop-fleece roller is provided, wherein a non-woven fabric is arranged on the surface of the scoop roller.
  • the nonwoven fabric can both facilitate the absorption of a washing solution by the scoop roller and act with a brush effect on the roll surface.
  • a rubber coating of the surface of the scoop roller can be provided.
  • a scoop roller is used in particular in combination with a liquid container or basin, wherein the basin can be arranged below the roller.
  • the basin can thus collect the used washing solution, in particular means for returning the used washing solution are provided.
  • the used washing solution can in this case be returned to the container and / or the means for applying at least one washing solution for further use.
  • a scoop roller is provided with a basin, wherein the scoop roller can be arranged so that the scoop roller is simultaneously in contact with a wash solution in the basin and the roll surface, so that the scoop roller over the roll surface with the wash solution from the basin a scooping applied.
  • the device has at least one combination of a scoop roller and a nozzle.
  • the nozzle can in particular serve to act on a washing solution, wherein the scoop roller enhances the cleaning action and in particular scooping the washing liquid out of a basin allows.
  • the nozzle may be configured to spray the roller surface and / or scoop roller with the wash solution.
  • the nozzle is adapted to spray the wash solution in the contact area of the roll surface and scoop roll.
  • the roller and the scoop roller can be arranged relative to one another such that the roller and scoop roller can roll on one another.
  • the roller is rotated, wherein the scoop roller runs through the contact with the roller surface or the scoop roller is rotated, wherein the roller runs along.
  • a brake of the rotational movement of the roller and / or the scoop roller is provided, so that the rotational speeds of the roller and work rolls are different relative to each other, wherein a slip between the roller surface and the surface of the scoop roller is formed.
  • the cleaning can be further improved and in particular a mechanical action of the scoop roller, such as a brush effect, be strengthened.
  • both roller and scoop roller can be driven in such a way that slippage occurs.
  • Various containers for washing solutions are provided according to an embodiment, which in particular provide different washing solutions or washing liquids. This makes it possible - as described for the method - several cleaning steps are performed with different washing solutions or washing liquids.
  • Various washing liquids can in each case be applied by an associated means for applying the washing liquid. In particular, however, various washing liquids are applied via common application means.
  • the containers may be connected via a valve means to the means for applying at least one washing solution, wherein the valve means controls which washing liquid is supplied to the means for applying.
  • the device can be further developed by providing at least one means for removing a washing liquid from the roll surface.
  • the device may comprise means for rinsing, in particular for applying water, alkanol or an alkanol / water mixture and / or the means for applying at least one washing solution may be adapted to apply water, alkanol or an alkanol / water mixture to the roll surface.
  • a water tank and / or supply lines are provided to a water supply, which are in particular connected to at least one nozzle.
  • the water provided is preferably DI water.
  • At least one scraper can be provided, which can be brought into contact with the roll surface, so that a reduction of liquid (washing liquid / water) is effected on the roll surface.
  • At least one means for drying the roll surface is provided. This can speed up the execution of the cleaning.
  • a means for drying the roll surface for example, an air blower and / or a heating means is provided.
  • the cleaning of the roller can be carried out by machine in a dedicated roller washing station.
  • the roller can be irrigated and / or sprayed with the washing solutions one after the other, with constant rotation, one after the other.
  • the rotational speed of the roller, the spray pressure of the washing solution, the counter-pressure force of a scoop roller and the duration of the washing solution can be varied and stored in ready-made cleaning programs, so that the washing process can also be carried out automatically.
  • the treatment liquids can be collected in a drip tray directly under the washing area or fed directly to the wastewater treatment.
  • An exemplary roller washing system for carrying out the method according to the invention comprises a washing rack (10) on which the roller (1) is deposited for cleaning.
  • the roller (1) On the washing rack (10), the roller (1) is rotatably mounted about its own axis. The rotation of the roller (1) is effected by a drive (9).
  • Under the roller (1) there is a sink or fluid catchment basin (8). This basin (8) can be filled with the respective washing liquid or with water during the roller cleaning and catches washing liquids during the cleaning of the roller (1).
  • a scoop nonwoven roll (14) is rotatably arranged parallel to the longitudinal axis of the roll (1) to be cleaned. The scoop-nonwoven roll (14) can be brought into contact with the roll (1) to be cleaned by means of a spring-pressure mechanism.
  • scoop-roller (14) washing liquid from the tub (8) can be applied to the roller (1). It may also exert a brushing action on the surface of the roller (1).
  • the scoop-roller (14) and / or the roller (1) is rotatable by an electric motor in both directions of rotation, wherein the rotational speed can be set to 20m / min or another speed.
  • a brake of the rotary motion of the scoop-nonwoven roll (14) is provided.
  • the roller to be cleaned (1) can be acted upon with the respective washing liquids.
  • the nozzles may spray wash liquid directly onto the roll surface and / or onto the scoop-roll (14).
  • the scrapers (12) serve to reduce the liquid (washing liquid / water) on the roll surface, in particular at the edges of the roll (1) to be cleaned, after a wash cycle.
  • the roller (1) to be cleaned is positioned on the washing rack (10) in the device or roller washing system.
  • the valve MV1 is opened and the pump P1 is turned on.
  • the roller to be cleaned is rotated about the electric motor M1 about its own axis.
  • the roller is then charged with a complexing degreasing agent stored in storage tank (4A) in a strongly alkaline washing liquid (solution 1, 2-4% by weight alkali metal hydroxide) and the roller is pre-cleaned with this liquid.
  • the scoop-roller (7) exerts a brushing action on the roller 1 and aids in cleaning.
  • the effluent solution 1 is collected in the basin 8.
  • the used solution 1 in the tank (8) is returned via the open valve 4.1 in the liquid container 4A.
  • valve 4.2 is closed. If no wash solution is left in the tub, valve 4.1 will also be closed.
  • Valve 4.4 opens.
  • an alkaline washing solution 2 having an alkali hydroxide concentration of 0.5 to 1.0% by weight (solution 2), regulated by valve 4.4 flows to the nozzles (6) and from there to the roller (1). applied for their further purification. Washing liquid 2 also contains a complexing degreasing agent.
  • the feed of solution 2 to the nozzles (6) is interrupted by the valve 4.4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Cleaning In General (AREA)
EP18164316.4A 2018-03-27 2018-03-27 Walzenreinigungsverfahren mit walzenreinigungsvorrichtung Pending EP3546080A1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP18164316.4A EP3546080A1 (de) 2018-03-27 2018-03-27 Walzenreinigungsverfahren mit walzenreinigungsvorrichtung
PCT/EP2019/057728 WO2019185720A2 (de) 2018-03-27 2019-03-27 Walzenreinigungsverfahren und walzenreinigungsvorrichtung
CN201980022717.7A CN111971129B (zh) 2018-03-27 2019-03-27 轧辊清洁方法及轧辊清洁装置
JP2020551539A JP6932858B2 (ja) 2018-03-27 2019-03-27 ローラ洗浄方法およびローラ洗浄装置
EP19713043.8A EP3774098A2 (de) 2018-03-27 2019-03-27 Walzenreinigungsverfahren und walzenreinigungsvorrichtung
US17/032,870 US11945008B2 (en) 2018-03-27 2020-09-25 Roller cleaning method and roller cleaning machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18164316.4A EP3546080A1 (de) 2018-03-27 2018-03-27 Walzenreinigungsverfahren mit walzenreinigungsvorrichtung

Publications (1)

Publication Number Publication Date
EP3546080A1 true EP3546080A1 (de) 2019-10-02

Family

ID=61827634

Family Applications (2)

Application Number Title Priority Date Filing Date
EP18164316.4A Pending EP3546080A1 (de) 2018-03-27 2018-03-27 Walzenreinigungsverfahren mit walzenreinigungsvorrichtung
EP19713043.8A Pending EP3774098A2 (de) 2018-03-27 2019-03-27 Walzenreinigungsverfahren und walzenreinigungsvorrichtung

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP19713043.8A Pending EP3774098A2 (de) 2018-03-27 2019-03-27 Walzenreinigungsverfahren und walzenreinigungsvorrichtung

Country Status (5)

Country Link
US (1) US11945008B2 (zh)
EP (2) EP3546080A1 (zh)
JP (1) JP6932858B2 (zh)
CN (1) CN111971129B (zh)
WO (1) WO2019185720A2 (zh)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
US11191408B2 (en) * 2018-12-13 2021-12-07 Midea Robozone Technology Co., Ltd. Docking station for cleaning robots with roller brush

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CN113211324A (zh) * 2021-04-15 2021-08-06 温晶莹 一种耐磨损压毛刺辊喷砂防渗透并清洁涂层装置
CN115815334A (zh) * 2023-02-13 2023-03-21 威科德金属有限公司 一种基于复合金属轧制的保护片及制备设备
CN116872568B (zh) * 2023-06-02 2024-04-12 广东振远智能科技有限公司 一种瓦楞纸板单面机

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JPS5739012A (en) * 1980-08-20 1982-03-04 Nippon Steel Corp Cold rolling method
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Also Published As

Publication number Publication date
US11945008B2 (en) 2024-04-02
WO2019185720A3 (de) 2019-11-21
CN111971129A (zh) 2020-11-20
WO2019185720A2 (de) 2019-10-03
JP6932858B2 (ja) 2021-09-08
CN111971129B (zh) 2021-12-24
JP2021510634A (ja) 2021-04-30
US20210008605A1 (en) 2021-01-14
EP3774098A2 (de) 2021-02-17

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