EP2303481B1 - Vorrichtung zur reinigung einer walze eines walzwerks - Google Patents

Vorrichtung zur reinigung einer walze eines walzwerks Download PDF

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Publication number
EP2303481B1
EP2303481B1 EP08874784.5A EP08874784A EP2303481B1 EP 2303481 B1 EP2303481 B1 EP 2303481B1 EP 08874784 A EP08874784 A EP 08874784A EP 2303481 B1 EP2303481 B1 EP 2303481B1
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EP
European Patent Office
Prior art keywords
nozzles
cylinder
roll
cleaning
distance
Prior art date
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Active
Application number
EP08874784.5A
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English (en)
French (fr)
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EP2303481A1 (de
Inventor
Pierre Anglade
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.)
Clecim SAS
Original Assignee
Siemens VAI Metals Technologies SAS
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Publication date
Application filed by Siemens VAI Metals Technologies SAS filed Critical Siemens VAI Metals Technologies SAS
Publication of EP2303481A1 publication Critical patent/EP2303481A1/de
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Classifications

    • 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
    • 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
    • B08B3/02—Cleaning by the force of jets or sprays
    • 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
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/024—Cleaning by means of spray elements moving over the surface to be cleaned

Definitions

  • the invention relates to high-pressure jet cleaning of a cylinder, for example a support cylinder or a working roll of a rolling mill, in particular a skin-pass mill.
  • a cylinder for example a support cylinder or a working roll of a rolling mill, in particular a skin-pass mill.
  • US-A 5460023 describes a device according to the preamble of claim 1.
  • a surface of the rolls of skin-pass mills may be polluted by adhesions that adversely affect the surface quality of the strip.
  • This is, for example, the case of rolling mills installed online in continuous galvanizing plants.
  • Zinc particles stick to the working cylinder. With each rotation of the cylinder, these particles print on a coating of the strip and can alter its surface quality.
  • Another example is in certain applications, where it is necessary to lubricate a working cylinder gap with an emulsion of water and lubricant. In this case, a greasy deposit is generally formed on the cylinder in areas that are not in contact with the bandaged. When changing the width of the strip, this deposit can be detrimental to a roughness transfer on the edges of the strip.
  • One solution employs cylinder cleaning devices by pressurized spraying of detergent fluids. These operations were first manual and then mechanized as described in JP 9 222 907 . However, these devices, using low pressure and wide jet nozzles, are effective in degreasing lubricant coatings due to a detergent effect of a sprayed liquid, but they do not are not able to eliminate adhesions including zinc particles.
  • This arrangement imposes a perfect adaptation of the speed of movement of the lance at a rotational speed of the cylinder according to a jet impact width.
  • the patent discloses a possibility of adjusting a nozzle / cylinder distance and a speed of movement of the nozzle. This method is limited by a low speed of displacement imposed by characteristics of the high pressure nozzles. Given a relatively small dimension of a jet impact, it is necessary to have a slow speed of movement, in order to guarantee a good recovery of the impact. For cylinders with a diameter of about 500 millimeters, a table length of about 2 meters and a peripheral band speed of about 120 m / min at 650 m / min, the travel time of a nozzle along the cylinder is about 1 minute 30 seconds.
  • the object of the present invention is to solve problems of stability of the cleaning devices and problems of cleaning accuracy with respect to a surface to be cleaned of the cylinder, the problems being introduced by long strokes of the displacement members which cause a change.
  • the entire device has an important point of gravity and equally important forces that operate at the ends of the device, thus producing high material wear.
  • Another object of the present invention is to reduce a cleaning time of the cylinder each round-trip in a fixed period adjustable between 30 seconds and 1 minute. As the spray is limited to one-way or return-only, the waste of cleaning liquid is removed.
  • one of the cylinder zones swept by at least one nozzle is no longer cleaned in a time varying for example from 0 to 3 minutes each round-trip, but in a fixed period adjustable between 30 seconds and 1 minute following the number N of nozzles chosen.
  • the cleaning frequency is therefore able to be increased in favor of a better quality cleaning because it is more intensive.
  • the figure is divided into two parts 1a and 1b. Both parts show a rolling mill cylinder (1) supported by bearings (2).
  • a cleaning device (3) is able to move towards the cylinder (1) parallel to an axis (5) of the cylinder (1) under the action of a jack (4).
  • the cleaning device (3) comprises two supports (31) and (32) each providing a cleaning liquid supply of four nozzles (311, 312) and (321, 322) disposed in a first and a second pair of nozzles on each of the two supports (31, 32).
  • the first two nozzles (311, 312) are active and clean respectively a first zone (1-311) and a second zone (1-312) of the cylinder, the two said zones being juxtaposed.
  • the second pair of nozzles (321, 322) is then inactive.
  • the second pair of the nozzles (321, 322) becomes active and cleans respectively a third zone (1-321) and a fourth zone (1-322). of the cylinder, the two said zones being juxtaposed and offset with respect to the preceding zones.
  • the first pair of nozzles (311, 312) is then inactive.
  • a stroke (41) of the cylinder (4) is at least equal to a quarter of a length (11) of the cylinder.
  • a major advantage of the invention is the fact that a displacement stroke of the nozzles is reduced to 1 / N of the length of the active surface of the cylinders, which makes it possible to reduce in the same proportion a stroke. of the cylinder (4). This improves the stability of the cleaning device (3) by minimizing a displacement of the center of gravity of the device, the displacement occurring at each stroke of the cylinder (4), as well as to increase the accuracy of the cleaning.
  • the number of nozzles N is equal to four.
  • the advantage in the metallurgical framework is to simplify the device (for example, to avoid an excessive number of nozzles) and likewise to considerably reduce a duration for a complete return of the nozzles (311, 312, 321, 322).
  • the N nozzles (311, 312, 321, 322) are capable of spraying a liquid at high pressure on a surface of the cylinder (1). Using high pressure nozzles improves cleaning with a reduced amount of cleaning fluid.
  • a high-pressure jet makes it possible to take advantage of a mechanical detachment of the particles present on the surface of the cylinder, apart from chemical detachment caused by a detergent, which makes it possible to reduce a percentage detergent present in the cleaning liquid.
  • the N nozzles (311, 312, 321, 322) are arranged at an equal mutual distance, said distance being equal to a portion 1 / N (inversely proportional to the number of nozzles N) of the length of the cylinder (1).
  • the distance between the nozzles is equal, making it possible to define for each of the N nozzles an exact cleaning part of the surface of the cylinder, avoiding cleaning areas superimposed, therefore superfluous.
  • the device comprises means for adjusting a distance between the N nozzles and the cylinder.
  • this variant makes it possible to adjust a width of the jet sprayed by the nozzles, in other words to adjust a contact surface of the jet with the cylinder. For example, in cases where spot cleaning is required, the distance will be decreased.
  • the cylinder (4) is arranged so that its stroke (minimized due to the number of nozzles distributed in a manner on the supports / arms adjoining the cylinder) is parallel to the axis of the cylinder (1). Because the invention provides that the stroke is minimized because of the number of nozzles distributed in the arms / supports adjoining the jack, the parallelism of the same stroke is all the easier to ensure, without resorting to a positioning system-cylinder heavy, bulky, complex and expensive.
  • the device comprises a control means adapted to activate a first part of the N nozzles (311, 312, 321, 322) and simultaneously to deactivate a second part of the remaining N nozzles during a first movement of the N nozzles caused by an output of the cylinder (4), said control means being also adapted to deactivate the first part and to activate the second part during a second movement of the N nozzles (311, 312, 321, 322) caused by a retraction of the jack (4).
  • the advantage produced is that a waste of cleaning liquid is reduced and that the round trip time of the nozzles is reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Claims (5)

  1. Vorrichtung zur Reinigung einer Walze (1) einer Stahlband-Umformanlage, die für eine zu einer Achse (5) dieser Walze (1) parallele Verschiebung geeignet ist, gekennzeichnet durch:
    mindestens eine gerade Anzahl von Düsen N > 0 für parallele Zerstäubung, wobei diese Düsen senkrecht zur Achse (5) der Walze sind, wobei eine erste Anzahl N/2 der Düsen (311, 312) an einem ersten Arm (31) eines Träger (3) befestigt ist und eine zweite Anzahl N/2 der Düsen (321, 322) an einem zweiten Arm (32) des Trägers (3) befestigt ist, wobei dieser Träger (3) mit einem Zylinder (4) gekoppelt ist, wobei der Zylinder (4) einen Hub aufweist, der mindestens gleich einem Anteil von 1/N einer Länge der Walze (1) ist.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Anzahl der Düsen N gleich vier ist.
  3. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die N Düsen (311, 312, 321, 322) in gleichem Abstand voneinander angeordnet sind, wobei dieser Abstand gleich einem Anteil von 1/N der Länge der Walze (1) ist.
  4. Vorrichtung nach einem der vorhergehenden Ansprüche, welche Mittel zur Einstellung eines Abstands zwischen den N Düsen und der Walze umfasst.
  5. Vorrichtung nach einem der vorhergehenden Ansprüche, welche ein Steuerungsmittel umfasst, das dafür eingerichtet ist, einen ersten Teil der N Düsen (311, 312, 321, 322) bei einer ersten Bewegung der N Düsen, die durch ein Ausfahren des Zylinders (4) hervorgerufen wird, zu aktivieren und gleichzeitig einen zweiten, restlichen Teil der N Düsen zu deaktivieren, wobei dieses Steuerungsmittel außerdem dafür eingerichtet ist, bei einer zweiten Bewegung der N Düsen (311, 312, 321, 322), die durch ein Einfahren des Zylinders (4) hervorgerufen wird, den ersten Teil zu deaktivieren und den zweiten Teil zu aktivieren.
EP08874784.5A 2008-06-27 2008-06-27 Vorrichtung zur reinigung einer walze eines walzwerks Active EP2303481B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FR2008/000920 WO2009156598A1 (fr) 2008-06-27 2008-06-27 Dispositif de nettoyage d' un cylindre d' un laminoir

Publications (2)

Publication Number Publication Date
EP2303481A1 EP2303481A1 (de) 2011-04-06
EP2303481B1 true EP2303481B1 (de) 2013-10-16

Family

ID=40266065

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08874784.5A Active EP2303481B1 (de) 2008-06-27 2008-06-27 Vorrichtung zur reinigung einer walze eines walzwerks

Country Status (5)

Country Link
US (1) US20110168215A1 (de)
EP (1) EP2303481B1 (de)
CN (1) CN102076437B (de)
ES (1) ES2442267T3 (de)
WO (1) WO2009156598A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5433794B2 (ja) * 2011-05-16 2014-03-05 新日鉄住金エンジニアリング株式会社 圧延ロールの洗浄装置および洗浄方法
ITPC20120001A1 (it) * 2012-01-19 2013-07-20 Nordmeccanica Spa Dispositivo e metodo per la pulizia di rulli di un gruppo di spalmatura
EP3546080A1 (de) * 2018-03-27 2019-10-02 Hydro Aluminium Rolled Products GmbH Walzenreinigungsverfahren mit walzenreinigungsvorrichtung
CN110314884A (zh) * 2019-05-28 2019-10-11 唐山钢铁集团有限责任公司 高压水小车的控制方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4893642A (en) * 1989-01-11 1990-01-16 Grapar Corporation Production line part deburring apparatus
US5460023A (en) * 1991-09-13 1995-10-24 International Rolling Mill Consultants Inc. Roll surface restoration system and method
CA2332933C (en) * 1998-07-10 2007-11-06 Ipsco Inc. Method and apparatus for producing martensite- or bainite-rich steel using steckel mill and controlled cooling
DE19848174A1 (de) * 1998-10-20 2000-05-04 Bwg Bergwerk Walzwerk Verfahren und Vorrichtung zum Reinigen von Walzen und/oder Rollen in Bandgießanlagen, Walzwerken und/oder Bandprozeßlinien, insbesondere Dressierwerken o. dgl. Nachwalzwerken
DE102004048619A1 (de) * 2004-10-06 2006-04-13 Sms Demag Ag Verfahren und Vorrichtung zum Reinigen von Walzen

Also Published As

Publication number Publication date
ES2442267T3 (es) 2014-02-10
WO2009156598A1 (fr) 2009-12-30
EP2303481A1 (de) 2011-04-06
US20110168215A1 (en) 2011-07-14
CN102076437A (zh) 2011-05-25
CN102076437B (zh) 2014-03-19

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