US20150020845A1 - Cleaning device and method for removing a lubricant from the rolls of a roll stand - Google Patents

Cleaning device and method for removing a lubricant from the rolls of a roll stand Download PDF

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Publication number
US20150020845A1
US20150020845A1 US14/376,281 US201214376281A US2015020845A1 US 20150020845 A1 US20150020845 A1 US 20150020845A1 US 201214376281 A US201214376281 A US 201214376281A US 2015020845 A1 US2015020845 A1 US 2015020845A1
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US
United States
Prior art keywords
cleaning
roll
rolls
water
cleaning device
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.)
Abandoned
Application number
US14/376,281
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English (en)
Inventor
Johannes Dagner
Martin Roessiger
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.)
Primetals Technologies Germany GmbH
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Assigned to SIEMENS AKTIENGESELLSCHAFT reassignment SIEMENS AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ROESSIGER, MARTIN, Dagner, Johannes
Publication of US20150020845A1 publication Critical patent/US20150020845A1/en
Assigned to PRIMETALS TECHNOLOGIES GERMANY GMBH reassignment PRIMETALS TECHNOLOGIES GERMANY GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SIEMENS AKTIENGESELLSCHAFT
Abandoned 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
    • B21B45/0269—Cleaning
    • B21B45/0275—Cleaning devices
    • B21B45/0278—Cleaning devices removing liquids
    • B21B45/0284—Cleaning devices removing liquids removing lubricants
    • 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
    • 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
    • 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

Definitions

  • the invention relates to a cleaning device and a method for removing a lubricant from the rolls of a roll stand.
  • Roll stands typically comprise devices for roll gap lubrication which are usually mounted on the inflow side of the roll stand in the region of the work roll.
  • a lubricant is applied to the work roll, and it is usually a water-oil emulsion that is sprayed on as the lubricant.
  • the lubricant significantly reduces the coefficient of friction between each roll and the material being rolled. In this manner, the rolling forces are reduced and the surface quality of the material being rolled is improved. This has the result that few rolling procedures are required and/or that the profile and flatness of the material being rolled can be better influenced by a greater degree of freedom in respect of the rolling force. Furthermore, the energy usage is reduced and the production spectrum is increased.
  • the rolls, particularly the work rolls must be free from lubricant in order to increase the coefficient of friction of the rolls again since otherwise the risk exists that the material being rolled is not drawn into the roll stand, leading to an interruption of the rolling process. For this reason, shortly before feeding-out of the material being rolled, the roll gap lubrication is switched off and, as a result, the lubricant burns off completely during the remaining roll circulations, due to the high strip temperature. Only following renewed feeding-in of the next material being rolled is the roll gap lubrication switched on again. The head and foot of the material being rolled are therefore rolled unlubricated. However, this has a disadvantageous effect on the rolling process since the foot of the material being rolled which is typically the coldest, requires the greatest rolling force.
  • the inventors propose a cleaning device for removing a lubricant from the rolls of a roll stand, wherein the cleaning device comprises at least one ultrasonic generator for generating ultrasonic waves wherein the ultrasonic waves can be conducted, with the aid of cleaning water, to the surface of the rolls, wherein the cleaning device comprises a supply line for the cleaning water, wherein the supply line is a branch of a cooling water circuit for the roll stand.
  • the inventors also propose a method for removing a lubricant from the rolls of a roll stand, wherein cleaning water is fed to the surface of the rolls and, by the cleaning water, ultrasonic waves are conducted to the surface of the rolls, wherein the cleaning water is diverted from a cooling water circuit for the roll stand.
  • the proposals are based on the recognition that the pressure of the cleaning fluid can be reduced, although intensive surface cleaning still takes place with high efficiency in that the cleaning is enhanced with ultrasonic waves which are propagated with the cleaning fluid to the surface of the roll and enhance the cleaning effect.
  • Ultrasound is known for acting also in small indentations in the surface and for mechanically bringing adhering particles or substances into solution. Due to the ultrasonic waves, the danger of damage to the surface of the roll is minimized. In addition, notches in the surface of the roll, for example, fire cracks can be cleaned efficiently.
  • the cleaning fluid is applied to the roll surface, in particular, at a pressure of 5 bar to 15 bar, the pressure being approximately ten times lower than the pressure required according to JP 2002-178011-A.
  • the at least one ultrasonic generator is integrated, in particular, into the cleaning device and is surrounded by the cleaning liquid so that the ultrasonic waves are emitted directly to the cleaning liquid and are propagated therethrough.
  • a liquid bridge is created between the ultrasonic generator and the roll surface which transmits the sound waves. This type of cleaning can be used both for the work rolls and for the backup rolls of a roll stand.
  • water is used as the cleaning agent. Since water is chemically neutral, the use of water is harmless to the rolls. Furthermore, water is widely used in the rolling process, so that large quantities of water are available in a mill train.
  • the main advantage of this type of cleaning is that the lubrication can be used for the whole strip foot and for a substantial part of the strip head. In this manner, the rolling force is reduced, resulting in a substantial energy saving effect. Furthermore, the product spectrum is thereby extended in that with identical design of the plant (drives, hydraulics and stands), harder steel goods can be rolled.
  • a particularly good synergy effect which increases the efficiency of the cleaning is achieved in that the cleaning water is diverted from the cooling water circuit for the roll stand, so that the water is conducted via a supply line of the cleaning device and this supply line is a branch of the cooling water circuit for the roll.
  • the water usage for the roll stand can be kept constant during the cleaning phase and there is merely a redistribution of the water in that part of the cooling water is fed to the cleaning device.
  • the ultrasonic generator is set to generate ultrasonic waves at a frequency of between 20 kHz and 2 MHz, in particular between 35 kHz and 200 kHz.
  • This frequency range has proved to be particularly advantageous for the ultrasonic cleaning of fine dirt.
  • at least two ultrasonic generators with different frequencies are provided, for example, an ultrasonic generator with a frequency of 40 kHz and an ultrasonic generator for 80 kHz.
  • a sealing element which faces toward a roll gap between the rolls, so that the sealing element seals the roll against outflowing liquid in the direction of rotation of the roll.
  • an opening facing away from the roll gap is provided at the cleaning device, by which the cleaning water is conveyed to the surface of the roll. It is ensured, through the emergence of the cleaning water against the direction of rotation of the roll, that lubricant removed from the roll surface is not carried away in the direction of rotation of the roll and does not come into contact with the material being rolled.
  • the cleaning device is arranged at least on the inflow side of the respective roll.
  • cleaning devices can also be provided on the outflow side. Since the cleaning device is distinguished by having a manageable number of additional components, it has a smaller space requirement and can easily be installed in a protected installation position in already existing components of the roll stand.
  • the cleaning device is integrated, in particular, in an insert of the work rolls or in a cooling beam for the roll stand.
  • at least one cleaning device is provided on the inflow side per roll and, in the case of reversibly driven roll stands, two cleaning devices per roll are useful—one on the inflow side and one on the outflow side.
  • the cleaning water contains an emulsifier.
  • the cleaning performance is increased since lubricant particles which are flung upward during the cleaning process cannot so easily become deposited again on the roll surface.
  • it is particularly the same emulsifier which is mixed into the lubricant that is used. In this way, it is ensured that no additional operating materials must be made available, rather the cleaning of the roll surface is carried out only with the aid of operating materials which are already required and permitted for the operation of the roll stand.
  • the temperature of the cleaning water is between 0° C. and 70° C.
  • the temperature of the cleaning water corresponds to an ambient temperature so that no additional heating effort is required for the cleaning water or else that such a heating effort remains within limits.
  • the cleaning device is preferably only active between a discharge of a previous material being rolled by the roll stand and an entry of the following material being rolled. In this way, only the part of the roll which comes into contact with the head of the following material being rolled is cleaned. If the subsequent rolling strip has already been drawn into the roll gap, the cleaning process is interrupted and normal operation of the roll stand is resumed. Particularly during relatively long pauses between two rolling strips, it can occur, however, that the cleaning of the roll surface does not begin with the discharge or that cleaning does not occur continuously until the entry.
  • FIG. 1 is a section through a roll stand with ultrasonic cleaning of the work roll
  • FIG. 2 is a cross-section through a cleaning device for an upper work roll of the roll stand of FIG. 1 ,
  • FIG. 3 is a longitudinal section through the cleaning device of FIG. 2 .
  • FIG. 4 is a coolant circuit and a lubricant circuit of a roll.
  • FIG. 1 shows a roll stand 2 which comprises two work rolls 4 and two backup rolls 6 .
  • a roll gap 8 is formed between the work rolls, through which gap materials being rolled, in the exemplary embodiment rolling strips, pass.
  • FIG. 1 shows a preceding rolling strip 10 that has previously been rolled and has a reduced thickness, the foot part of which is still situated in the roll gap 8 , and a subsequent rolling strip 12 which has been prepared for rolling.
  • a lubricant is fed to the work rolls 4 through lubricant nozzles 14 .
  • the roll gap 8 Before the entry of the subsequent rolling strip 12 , however, the roll gap 8 must be lubricant-free so that the rolling strip 12 can be drawn into the roll stand 2 without difficulty.
  • a cleaning device 16 is provided, with the help of which a cleaning liquid which, in the exemplary embodiment shown, is water is applied onto the surfaces of the work rolls 4 . The cleaning water is applied only to part of the surface.
  • each cleaning device 16 is built into the cooling circuit of the work rolls 4 and is fastened to a protective sheet 20 on an inflow side.
  • the function of the protective sheet 20 is to prevent cooling water reaching the rolling strip 10 , 12 .
  • the coolant circuit has a coolant feed 22 on the inflow side and on the outflow side which opens into a cooling beam 24 and which substantially extends over the length of the working beams perpendicular to the plane of the drawing. Branching from the coolant supply 22 on the inflow side is also a supply line 26 through which water is fed into the cleaning device 16 .
  • the structure of the cleaning device 16 is shown in FIGS. 2 and 3 .
  • the cleaning device 16 comprises a hollow space 28 which, during operation, is filled with water.
  • the ultrasonic generator 18 is arranged in the hollow space 28 so that, during operation, water which is conveyed in the direction toward the roller surface, in particular, continuously flows round the ultrasonic generator 18 .
  • a sealing element 32 Arranged on a side 30 of the cleaning device 16 facing toward the roll gap 8 is a sealing element 32 which is configured in the manner of a sealing lip. In particular, by the contact thereof with the roll surface, the sealing element prevents water from flowing downwardly out of the cleaning device 16 to the rolling strip 10 , 12 during the rotary motion of the work roll 4 .
  • an opening 36 provided, through which the water is conducted out of the cleaning device 16 to the roll surface in the direction opposing the rotation direction of the work roll 4 .
  • the opening 36 faces downwardly so that gravity also acts thereon and reinforces the outflow of the cleaning water.
  • apertures can also be provided here in the region of the end sides of the work rolls 4 . In this case, the lateral outflow of the cleaning water can be collected, for example, via lines or guiding sheets and fed into the circuit.
  • guiding sheets 38 which bring about an even flow through the hollow space 28 are optionally provided in the cleaning device 16 , so that the formation of dead zones in the hollow space 28 is prevented.
  • the water transmits the sound waves from the ultrasonic generator 18 to the roll surface and thereby forms a type of liquid bridge between the ultrasonic generator 18 and the work roll 4 .
  • the lubricant is atomized at the roll surface and is removed by the water.
  • the water, which is used as cleaning water is conveyed at a pressure of approximately 10 bar to the work roll 4 and has, in particular, a temperature which corresponds to the temperature resulting from the process management and/or the plant state. Thus, in particular, no further heating measures are required for the removal of the lubricant from the roll surface.
  • FIG. 4 The fluid technology-related connection between the cleaning device 16 , the cooling water circuit and a lubricant circuit of the roll stand 2 is shown in FIG. 4 .
  • the reference sign 40 in FIG. 4 indicates a lubricant tank and the reference sign 42 indicates an emulsifier tank.
  • the lubricant, the emulsifier and water from a water supply line 48 for the stand cooling are brought together in a mixer 44 and fed via a lubricant line 46 to the lubricant nozzle 14 which, in the exemplary embodiment shown, is arranged under the protective sheet 20 close to the roll gap 8 .
  • Cooling water is fed out of the water supply line 48 into the cooling water line 22 and is sprayed via the cooling beam 24 onto the surface of the work roll 4 . Part of the cooling water is diverted via the supply line 26 before reaching the cooling beam 24 .
  • the ratio of the cooling water flow to the cleaning flow lies in the range of 10:1 to 2:1.
  • the portion of the water in the supply line 26 is mixed in a second mixer 50 with the emulsifier from the emulsifier tank 42 and is subsequently fed into the cleaning device 16 .
  • an emulsifier line 52 leads directly from the emulsifier tank 42 to the second mixer 50 which, like the cleaning device 16 , is also arranged on the protective sheet 20 .
  • the efficiency of the cleaning water is increased by the emulsifier.
  • the supply line 26 also opens into the second mixer 50 .
  • the water feed into the lines 22 and 26 can be controlled dynamically and in a short time span depending on the rolling process.
  • the water supply to the cleaning device 16 is interrupted so that the whole quantity of water is used in the cooling water line 22 for cooling purposes.
  • the cleaning device 16 is switched on only briefly between a discharge of the preceding rolling strip 10 and an entry of the subsequent rolling strip 12 .
  • part of the water in the cooling water line 22 is diverted into the supply line 26 and finally reaches the cleaning device 16 .
  • the roll stand 2 is therefore distinguished not only by an efficient operation thanks to the increase in the coefficient of friction during feeding in of the rolling strips 10 , 12 , but also by a minimized energy requirement and a potentially constant water requirement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Metal Rolling (AREA)
US14/376,281 2012-02-01 2012-12-12 Cleaning device and method for removing a lubricant from the rolls of a roll stand Abandoned US20150020845A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP12153475.4A EP2623223A1 (de) 2012-02-01 2012-02-01 Reinigungsvorrichtung und Verfahren zum Entfernen eines Schmiermittels von den Walzen eines Walzgerüstes
EP12153475 2012-02-01
PCT/EP2012/075215 WO2013113441A1 (de) 2012-02-01 2012-12-12 Reinigungsvorrichtung und verfahren zum entfernen eines schmiermittels von den walzen eines walzgerüstes

Publications (1)

Publication Number Publication Date
US20150020845A1 true US20150020845A1 (en) 2015-01-22

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ID=47469942

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/376,281 Abandoned US20150020845A1 (en) 2012-02-01 2012-12-12 Cleaning device and method for removing a lubricant from the rolls of a roll stand

Country Status (5)

Country Link
US (1) US20150020845A1 (de)
EP (2) EP2623223A1 (de)
CN (1) CN104080552B (de)
BR (1) BR112014019035A8 (de)
WO (1) WO2013113441A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160087811A1 (en) * 2014-09-19 2016-03-24 Xiaomi Inc. Methods and devices of accessing wireless network
US20160270088A1 (en) * 2013-10-31 2016-09-15 Sony Corporation Communications system, communications device, infrastructure equipment and method of communicating
CN110026438A (zh) * 2019-05-20 2019-07-19 安徽协同创新设计研究院有限公司 一种铜带轧机轧辊清洗装置
US10953447B2 (en) 2018-06-13 2021-03-23 Novelis Inc. Systems and methods for containing viscous materials in roll processing
US11007557B2 (en) 2018-06-13 2021-05-18 Novelis Inc. Systems and methods for removing viscous materials in metal article processing
JP2021527570A (ja) * 2018-06-19 2021-10-14 エス・エム・エス・グループ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング エマルション循環設備
WO2024102241A1 (en) * 2022-11-09 2024-05-16 Primetals Technologies USA LLC Quick-change roll cooling header cartridge with real-time feedback of operational data

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3357660A1 (de) * 2017-02-06 2018-08-08 R. Faerch Plast A/S Verfahren und system zum sauberhalten einer kalanderwalze
TWI620905B (zh) * 2017-06-14 2018-04-11 住華科技股份有限公司 除液裝置
EP4286068A1 (de) * 2022-06-02 2023-12-06 Primetals Technologies Austria GmbH Verfahren sowie vorrcihtung zum betreiben einer arbeitswalze beim warmwalzen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6125915A (en) * 1994-03-30 2000-10-03 Golden Aluminum Company Method of and apparatus for cleaning a continuous caster
DE10148401A1 (de) * 2001-09-29 2003-04-17 Karl Beis Einrichtung zum Reinigen von Oberflächen mittels Ultraschall

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002178011A (ja) * 2000-12-06 2002-06-25 Sumitomo Metal Ind Ltd 鋼板の熱間潤滑圧延方法およびその装置
DE10145902A1 (de) * 2001-09-18 2003-04-10 Andreas H Stranz Verfahren und Vorrichtung zum Reinigen der Oberfläche eines in Einbau- und Betriebsstellung befindlichen Maschinen- oder Anlagenteils
CN1938109A (zh) * 2004-04-05 2007-03-28 Bfivdeh-应用研究院有限公司 从带材的表面去除液体的方法和装置
DE102005008939A1 (de) * 2005-02-26 2006-09-21 Sms Demag Ag Verfahren und Vorrichtung zum Reiningen eines Metallbandes
WO2008136537A1 (ja) * 2007-05-01 2008-11-13 Nippon Steel Corporation 鋼板の洗浄方法及び鋼板の連続洗浄装置
CN201217016Y (zh) * 2008-06-23 2009-04-08 宝山钢铁股份有限公司 带钢表面清洗加工的超声波处理装置
CN101556267B (zh) * 2009-05-22 2013-07-10 东北大学 一种模拟铁素体不锈钢热轧粘辊的实验方法及其装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6125915A (en) * 1994-03-30 2000-10-03 Golden Aluminum Company Method of and apparatus for cleaning a continuous caster
DE10148401A1 (de) * 2001-09-29 2003-04-17 Karl Beis Einrichtung zum Reinigen von Oberflächen mittels Ultraschall

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160270088A1 (en) * 2013-10-31 2016-09-15 Sony Corporation Communications system, communications device, infrastructure equipment and method of communicating
US20160087811A1 (en) * 2014-09-19 2016-03-24 Xiaomi Inc. Methods and devices of accessing wireless network
US10953447B2 (en) 2018-06-13 2021-03-23 Novelis Inc. Systems and methods for containing viscous materials in roll processing
US11007557B2 (en) 2018-06-13 2021-05-18 Novelis Inc. Systems and methods for removing viscous materials in metal article processing
JP2021527570A (ja) * 2018-06-19 2021-10-14 エス・エム・エス・グループ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング エマルション循環設備
CN110026438A (zh) * 2019-05-20 2019-07-19 安徽协同创新设计研究院有限公司 一种铜带轧机轧辊清洗装置
WO2024102241A1 (en) * 2022-11-09 2024-05-16 Primetals Technologies USA LLC Quick-change roll cooling header cartridge with real-time feedback of operational data

Also Published As

Publication number Publication date
BR112014019035A8 (pt) 2017-07-11
EP2623223A1 (de) 2013-08-07
EP2794137B1 (de) 2016-03-09
WO2013113441A1 (de) 2013-08-08
CN104080552B (zh) 2016-04-13
EP2794137A1 (de) 2014-10-29
CN104080552A (zh) 2014-10-01
BR112014019035A2 (de) 2017-06-20

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Owner name: SIEMENS AKTIENGESELLSCHAFT, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DAGNER, JOHANNES;ROESSIGER, MARTIN;SIGNING DATES FROM 20140624 TO 20140625;REEL/FRAME:033456/0039

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