EP2134480B1 - Procede de nettoyage de cylindre de laminoir et dispositif correspondant - Google Patents

Procede de nettoyage de cylindre de laminoir et dispositif correspondant Download PDF

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Publication number
EP2134480B1
EP2134480B1 EP07871988A EP07871988A EP2134480B1 EP 2134480 B1 EP2134480 B1 EP 2134480B1 EP 07871988 A EP07871988 A EP 07871988A EP 07871988 A EP07871988 A EP 07871988A EP 2134480 B1 EP2134480 B1 EP 2134480B1
Authority
EP
European Patent Office
Prior art keywords
cleaning
zone
cleaned
roll
nozzle
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
EP07871988A
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German (de)
English (en)
French (fr)
Other versions
EP2134480A1 (fr
Inventor
Thomas Cacciatore
Ludovic Verzier
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
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 VAI Metals Technologies SAS filed Critical Siemens VAI Metals Technologies SAS
Priority to PL07871988T priority Critical patent/PL2134480T3/pl
Publication of EP2134480A1 publication Critical patent/EP2134480A1/fr
Application granted granted Critical
Publication of EP2134480B1 publication Critical patent/EP2134480B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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 present invention relates to the cleaning of rolling mill rolls, in particular skin-pass rolling mills, used at the outlet of continuous galvanizing lines, by high-pressure jet.
  • a skin-pass mill comprises a pair of support rollers on which a pair of work rolls are supported between which a galvanized strip is laminated.
  • these particles can print on the coating of the strip with each rotation of the rolls and can sufficiently alter the surface quality so that the product becomes unsellable or needs to be decommissioned.
  • JP 9262607 in which mechanized cleaning means of the rolls are used by pressurized spraying of detergent fluids.
  • these devices use low-pressure, wide-jet spray nozzles which, if they are effective enough to degrease lubricant coatings due to the detergent effect of the pulverized liquid, are not, however, effective enough to remove particles adherents, especially zinc particles.
  • the patent EP 0 995 504 discloses a cleaning device comprising moving lances, able to move along the cylinder, that is to say parallel to its axis of rotation. This arrangement imposes a perfect adaptation of the speed of movement of the lance to the speed of rotation of the cylinder according to the impact width of the jet.
  • the present invention proposes a solution that makes it possible to optimize the use of spraying devices in order to reduce the consumption of fluids - and thus the discharges - and to avoid wasted time.
  • the invention relates to a method of cleaning a roll of a rolling mill, comprising a cleaning step in which a nozzle operates in the cleaning regime while being moved parallel to the axis of the cylinder according to a cleaning speed.
  • the method is essentially characterized in that it further comprises a determination step in which is determined, on the cylinder, at least one working zone delimited by a starting position of work and a position of end of work, and in that the cleaning step is limited to the work area.
  • a metal strip 1 to be rolled passes between the working rolls 2a, 2b of a skin-pass mill.
  • These working cylinders are themselves supported by support cylinders 3A, 3B.
  • the device according to the invention comprises a cleaning nozzle 61 mounted on a lance and configured to pressurize a cleaning product to the cylinder to be cleaned.
  • At least one nozzle is provided for cleaning at least one cylinder, so that a nozzle can clean several cylinders and several nozzles clean a single cylinder.
  • Each lance is equipped with at least one nozzle, in this case a single nozzle.
  • At least one lance 6a ensures the cleaning of the upper working cylinder 2a
  • at least one other lance 6b ensures cleaning the lower working cylinder 2b.
  • At least one cylinder (or each cylinder) can be cleaned by a plurality of lances, in this case two.
  • the invention aims to clean primarily at least one of the working rolls.
  • the lances 6a, 6b for cleaning at least one of the working cylinders comprise a spraying nozzle 61, and a body 62 supplied with cleaning product, in this case a fluid under pressure by a flexible pipe 63.
  • the body 62 is supported by an axial adjustment device 64 itself carried by means for moving the nozzle, in this case a translation device 65.
  • FIGS. Figures 2A and 2B An example of an axial adjustment device 64 is illustrated in FIGS. Figures 2A and 2B in which the translation and rotation movements are shown schematically by solid arrows.
  • the axial adjustment device 64 comprises a support 641 pivotally mounted on the slide 652 of the translation device 65 in order to allow adjustment of the angle of inclination ⁇ of the lance 6a, 6b with respect to the cylinder 2a, 2b.
  • the pivoting of the support 641 relative to the slide 652 can be motorized, for example with a servomotor. It is then possible in this embodiment to use only two swivel lances, each respectively cleaning a working cylinder 2 and a support cylinder 3.
  • a first control member 643 ensures the adaptation to the diameter of the cylinders.
  • the slide 652 can be moved with a belt system as shown in FIG. Figure 2A , or chain, or with a ball screw.
  • the drive is advantageously provided by a servomotor.
  • the slide 652 is a carriage guided on a crossbar 651 by rollers.
  • the translation device 65 comprises the cross member 651 fixed on the chassis of the skin-pass mill and the slide 652 capable of moving parallel to the longitudinal axis of the cylinder 2a, 2b under the action of a second control member 653 fit to ensure the displacement of the axial adjustment device 64 carrying the lance 6a, 6b parallel to the axis of the working cylinder 2a, 2b.
  • first control member 643 and the second control member 653 are the same.
  • the nozzle is moved in translation, possibly back and forth, parallel to the axis of rotation of the cylinder to be cleaned, according to a first speed.
  • the first speed is slaved to at least one of the following parameters: diameter of the cylinder to be cleaned, rotational speed of said cylinder, and impact width of the jet emitted by the nozzle on said cylinder.
  • This control of the speed during the cleaning phase is for example implemented by the control member 653.
  • the control member 643 of the axial adjustment 64 positions the nozzle 61 at the required distance from the surface 21 of the working roll 2a, 2b.
  • the control member 643 for adjusting the position of the nozzle with respect to the surface of the cylinder can be actuated by a hydraulic or pneumatic cylinder, can also be equipped with a position detector or, alternatively, by a servomotor driving a wheel mechanism and worm, rack or belt.
  • the control member 653 of the translating device 65 moves the nozzle 61 at the required and controlled speed along the surface 21 of the working roll 2a, 2b so as to to ensure, over the cylinder turns, an optimal recovery of the impact of the cleaning jet, so that the entire surface to be cleaned thereof is covered.
  • the invention furthermore comprises means for determining at least one working zone delimited by a start of work position and an end of work position on the cylinder to be cleaned, and means for limiting the cleaning step to said zone. working.
  • a cylinder may comprise a plurality of work areas.
  • the means for determining at least one working area are optical means configured to obtain at least one image of the rolls and / or the web.
  • Each work area may include a recovery area R.
  • the optical means comprise at least one camera 8a, 8b, 8c, 8d of which the image is transmitted to a control screen present in a control cabin of the rolling mill.
  • An operator can then appreciate the transmitted images and determine the start and end positions for each work area.
  • the determination of the work areas is implemented automatically by a surface defect detection system 10a, 10b ( figure 4 ).
  • An illuminating device 101 illuminates the coated strip 1 at the exit of the skin-pass rolling mill.
  • a high-definition CCD camera 102 captures the image of the moving tape.
  • Such devices are known, for example in the patent application EP 0 974 833 .
  • the image acquired by the CCD camera 102 is transmitted to a filter unit 103 whose function is to eliminate the distortions due to vignetting and nonuniformity of illumination.
  • the filtered images are then processed in an image processing unit 104 of edge-detection or gray-scale type which makes it possible to highlight the more contrasted zones considered as "suspect zones", that is to say probably containing particles to clean.
  • the cleanliness of the cylinder is determined by a step of measuring the profile of the surface of said cylinder.
  • the device comprises means for determining at least one zone to be cleaned, said means for determining at least one zone to be cleaned comprising means for measuring the surface profile of said cylinder by triangulation by a sheet or a laser beam, the adhesions of foreign bodies (zinc particles, lubricating products, etc.) being measured as variations of the measured profile.
  • a laser line is projected on the surface of the cylinder to be cleaned.
  • a return optic reproduces the reflected light of this laser line on the matrix of a camera, in this case CMOS. From the camera image, a controller calculates not only the distance information (z-axis), but also the actual position along the laser line (x-axis), and outputs both results in a two-dimensional coordinate system.
  • a 3D representation is obtained by moving the laser sensor along the cylinder.
  • a beam or laser rib triangulation sensor may be mounted on the lance support 62. It scans the surface of the rotating cylinder by high speed displacement of the slide 652 on the slideways 651 and delivers position information of the fouled areas to the slide rails 651. clean with reference to the displacement encoder of the slide 652.
  • the beam size is, for example, from 1 to 150 mm, and preferably from 10 to 100 mm.
  • the device according to the invention further comprises air blowing means, in this case a compressed air blowing nozzle cooperating with said means for determining at least one zone to be cleaned, in order to dry the surface. of the cylinder to be analyzed.
  • air blowing means in this case a compressed air blowing nozzle cooperating with said means for determining at least one zone to be cleaned, in order to dry the surface. of the cylinder to be analyzed.
  • a lid serves to protect the triangulation window during the cleaning steps.
  • the visual or automatic detection of defects makes it possible to define the limits of a working zone 20, 21 or an area to be cleaned 10, 11, 12.
  • a work zone includes an area to be cleaned possibly increased by one or two areas of recovery R.
  • a cleaning nozzle is first positioned in a rest position A.
  • the nozzle In a transport step, the nozzle is moved parallel to the axis of the cylinder from an end-of-work position, and / or to a starting position of work.
  • the cleaning step can, thanks to the invention, be limited to this work zone.
  • the limitation is implemented by a transport step during which the nozzle operates in a regime different from the cleaning regime, and is moved parallel to the axis of the cylinder from an end of work position, and / or until 'to a work start position.
  • the nozzle operates in a regime different from the cleaning regime.
  • the operating speed is characterized by at least one of the following parameters: speed of movement, flow delivered by the nozzle, and pressure of the cleaning fluid at the outlet of the nozzle.
  • the displacement of the nozzle outside said working zone is carried out at a second speed, referred to as the transport speed, different from the first speed, referred to as the cleaning speed.
  • the transport speed different from the first speed, referred to as the cleaning speed.
  • the second speed is not slaved to the speed of rotation of the cylinder, and preferably maximum depending on the means for moving the nozzle.
  • the flow rate that is to say the amount of cleaning product delivered by the nozzle per unit of time, is different from the cleaning flow, in this case lower, delivered during the cleaning step.
  • the cleaning product is applied to the cylinder to be cleaned under a second pressure different from the first (cleaning pressure), in this case less than zero pressure. (cutting off the cleaning agent supply).
  • control member 653 of the axial adjustment device 65 positions the nozzle 61 at maximum speed along the surface 21 of the working cylinder 2a, 2b in order to start and stop cleaning exactly where it is needed.
  • the lance 6 moves at maximum speed from its rest position A to the cleaning start position B of a dried emulsion deposit 9a corresponding to an edge of the cylinder table and then provides the speed-controlled cleaning of cleaning B to C, will then be positioned at maximum speed at the beginning D of the second dried emulsion deposit 9b and then cleaning at controlled cleaning speed D to E and finally returns to maximum speed at the rest position A.
  • the recovery R adjusts the work area.
  • the lance 6 goes at maximum speed from its rest position A to the work start position I and then cleans at a controlled cleaning speed from I to J in order to clean the zinc particles adhered by the band 1, then returns at maximum speed at its home position A.
  • the work area 22 includes a first upstream zone, covering, extending from the work start position I to the zone start position of the zone to be cleaned K, and a second zone, downstream, covering extending from the end of zone position of the zone to be cleaned L to the end of work position J.
  • a control unit 105 determines the beginnings and ends of areas to be cleaned by possibly adding within a working area a covering R to the contours of the suspect zones as soon as they appear and delivers to the actuators 653 the displacement commands (cleaning regime in a different work area and regime outside the work area).
  • control unit 105 delivers to the actuators 653 displacement commands (cleaning regime in a work zone and a different speed outside the work zone) making it possible to ensure depending on the case, the cleaning of the full width of a cylinder or the only width corresponding to that of the contact with the increased band of one or more covers R or the only end portions of the cylinders which are not in contact with the band increased overlaps R ( Figures 3A, 3B , 3C ).
  • the triggering of the cleaning operation can be performed automatically or manually.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Cleaning In General (AREA)
  • Cleaning By Liquid Or Steam (AREA)
EP07871988A 2007-04-18 2007-12-20 Procede de nettoyage de cylindre de laminoir et dispositif correspondant Active EP2134480B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07871988T PL2134480T3 (pl) 2007-04-18 2007-12-20 Sposób czyszczenia walca walcarki i odpowiadające urządzenie

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0702813A FR2915118B1 (fr) 2007-04-18 2007-04-18 Procede de nettoyage de cylindre de laminoir et dispositif correspondant
PCT/FR2007/052577 WO2008129141A1 (fr) 2007-04-18 2007-12-20 Procede de nettoyage de cylindre de laminoir et dispositif correspondant

Publications (2)

Publication Number Publication Date
EP2134480A1 EP2134480A1 (fr) 2009-12-23
EP2134480B1 true EP2134480B1 (fr) 2013-03-06

Family

ID=38445706

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07871988A Active EP2134480B1 (fr) 2007-04-18 2007-12-20 Procede de nettoyage de cylindre de laminoir et dispositif correspondant

Country Status (9)

Country Link
EP (1) EP2134480B1 (zh)
KR (1) KR101115134B1 (zh)
CN (1) CN101646507B (zh)
BR (1) BRPI0721581A2 (zh)
DK (1) DK2134480T3 (zh)
ES (1) ES2410087T3 (zh)
FR (1) FR2915118B1 (zh)
PL (1) PL2134480T3 (zh)
WO (1) WO2008129141A1 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010033753A1 (de) * 2010-06-04 2011-12-08 Sms Siemag Ag Einrichtung zum Reinigen und Trocknen von Walzgerüsten
CN103170504B (zh) * 2013-03-01 2016-03-30 柳燕明 气垫无摩擦轧机清辊器及气垫无摩擦轧机清辊方法
CN103680928B (zh) * 2013-12-24 2015-12-02 天威保变（秦皇岛）变压器有限公司 一种线圈内径纸板筒的预处理工艺
WO2018050920A1 (de) 2016-09-19 2018-03-22 Sms Group Gmbh Walzenbearbeitung im laufenden prozess
CN111451283B (zh) * 2020-03-19 2021-08-03 武汉钢铁有限公司 一种辊面刮刀智能集控方法和系统

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6297705A (ja) * 1985-10-22 1987-05-07 Nippon Kokan Kk <Nkk> 圧延ロ−ルの欠陥検出除去装置
US5460023A (en) * 1991-09-13 1995-10-24 International Rolling Mill Consultants Inc. Roll surface restoration system and method
CN1121935C (zh) * 1998-05-01 2003-09-24 W·L·戈尔及同仁股份有限公司 可重复定位的喷嘴组件
FR2781570B1 (fr) * 1998-07-21 2000-08-25 Lorraine Laminage Dispositif de detection des defauts superficiels de bandes metalliques en defilement
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
ATE279300T1 (de) * 2000-08-22 2004-10-15 Linde Ag Verfahren und vorrichtung zur entfernung metallischer verunreinigungen
EP1304174A1 (de) * 2001-10-19 2003-04-23 Aluminium Norf GmbH Verfahren zur Aufbereitung von Walzen
KR20040034896A (ko) * 2002-10-17 2004-04-29 주식회사 포스코 위치 및 시간제어 기능을 갖춘 롤표면 진공 소제 장치 및방법

Also Published As

Publication number Publication date
KR101115134B1 (ko) 2012-03-05
CN101646507A (zh) 2010-02-10
CN101646507B (zh) 2012-03-21
FR2915118A1 (fr) 2008-10-24
DK2134480T3 (da) 2013-04-29
PL2134480T3 (pl) 2013-08-30
EP2134480A1 (fr) 2009-12-23
FR2915118B1 (fr) 2009-06-05
KR20090122996A (ko) 2009-12-01
ES2410087T3 (es) 2013-06-28
BRPI0721581A2 (pt) 2014-02-25
WO2008129141A1 (fr) 2008-10-30

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