EP1992424A1 - Verfahren und Vorrichtung zur Reinigung der umlaufenden Außenfläche geschweißter Metallrohre - Google Patents

Verfahren und Vorrichtung zur Reinigung der umlaufenden Außenfläche geschweißter Metallrohre Download PDF

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Publication number
EP1992424A1
EP1992424A1 EP08008241A EP08008241A EP1992424A1 EP 1992424 A1 EP1992424 A1 EP 1992424A1 EP 08008241 A EP08008241 A EP 08008241A EP 08008241 A EP08008241 A EP 08008241A EP 1992424 A1 EP1992424 A1 EP 1992424A1
Authority
EP
European Patent Office
Prior art keywords
pipe
cleaning
laser beam
welding bead
sublimating
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.)
Withdrawn
Application number
EP08008241A
Other languages
English (en)
French (fr)
Inventor
Maurizio Sbetti
Gianni Vettorazzi
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.)
Adige SpA
Original Assignee
Adige SpA
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 Adige SpA filed Critical Adige SpA
Publication of EP1992424A1 publication Critical patent/EP1992424A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/023—Cleaning the external surfaces
    • 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
    • B08B7/0035—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like
    • B08B7/0042—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like by laser

Definitions

  • the present invention relates to a method for cleaning the outer surface of welded metal pipes, thereby allowing the position of the welding bead of said tubes to be optically detected.
  • the invention further relates to a device for carrying out this method.
  • a detection of the position of the welding bead on the outer surfaces of welded metal pipes would improve any pipe making methods, since said position detection would allow the welding bead of a welded pipe to be properly processed, thereby enhancing the aesthetic and functional properties of said welded pipe.
  • a further practical example is a welding of folding workpieces, since in such an application the welding bead negatively affect a proper operation and strength of the bent workpiece.
  • Prior detection methods automatically detect the position of a welding bead on the outer surface of a welded pipe by optical detecting systems including an optical sensor which detects said welding bead position from brightness variations on the pipe surface, which generate contrast regions including a light band, corresponding to the welding bead, on a dark pipe, or vice versa.
  • a prior optical system would either detect a low signal/noise ratio contrast or several signal brightness peaks, which cannot be so distinguished from one another as to allow to precisely detect the position of said welding bead.
  • the aim of the present invention is to provide a method for cleaning pipes, in particular the outer surface of a metal tube, for removing therefrom elements hindering an optical read-out of the position of a welding bead.
  • a further object of the present invention is to provide a device for carrying out the above cleaning method.
  • a method for cleaning the circumferential outer surface of a welded metal pipe said method being characterized in that said surface is cleaned by melting, evaporating and/or sublimating extraneous materials or flaws on said surface.
  • the device for carrying out the above method said device being characterized in that it comprises a laser beam source.
  • the outer surface of a welded tube is so processed and cleaned to provide a clear optical contrast between the material of the pipe and its welding bead, thereby allowing a position detecting system to precisely detect and locate the position of the pipe welding bead, to in turn allow an operator to accurately set a proper position for performing further processing operations on said welding bead.
  • the reference number 1 generally shows a pipe to be cleaned by a cleaning method according to the invention.
  • Said pipe is a metal pipe, and has been welded at a welding bead 2 on the pipe surface 3 which welding bead 2 is partially smeared or covered by oil, fat or rust stains 4, paint layers 5, scratches or notches 6.
  • the method according to the invention provides to cause a laser beam to impinge on said surface 3, said laser beam 7 being properly focalized on the surface 3 level.
  • the laser beam 7 emitting head 8 is so arranged to cause said impinging laser beam to be only absorbed by the surface layers of said pipe 1, thereby allowing the laser impinging portion 9 of the surface 3 of the pipe 1 to be properly cleaned by melting, evaporating and/or sublimating the dirt, fat, oil and paint stains 4, 5, and scratches 6, the cleaning being achieved by melting, evaporating and/or sublimating the first surface layer 10 of said pipe 1 ( figure 3 ).
  • an aiding gas jet 13 ( figure 2 ) is further caused to impinge on said portion 9, thereby forming on the surface 3 of the pipe 1 and easily detectable and identifiable optical contrast between said surface material and said welding bead 2 of said pipe 1.
  • the laser beam 7 emitting head 8 used in the inventive method and device may comprise, for example, a laser beam emitting system of a commercially available type, such as of a type made by the same Applicant.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Laser Beam Processing (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Coating With Molten Metal (AREA)
EP08008241A 2007-05-16 2008-04-30 Verfahren und Vorrichtung zur Reinigung der umlaufenden Außenfläche geschweißter Metallrohre Withdrawn EP1992424A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000985A ITMI20070985A1 (it) 2007-05-16 2007-05-16 Procedimento e dispositivo per la pulizia della superficie circonferenziale esterna di tubi metallici saldati

Publications (1)

Publication Number Publication Date
EP1992424A1 true EP1992424A1 (de) 2008-11-19

Family

ID=39730578

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08008241A Withdrawn EP1992424A1 (de) 2007-05-16 2008-04-30 Verfahren und Vorrichtung zur Reinigung der umlaufenden Außenfläche geschweißter Metallrohre

Country Status (4)

Country Link
EP (1) EP1992424A1 (de)
JP (1) JP2008284548A (de)
BR (1) BRPI0801317A2 (de)
IT (1) ITMI20070985A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015192220A1 (en) * 2014-06-19 2015-12-23 Magna International Inc. Method and apparatus for laser assisted power washing
CN110695008A (zh) * 2019-10-28 2020-01-17 苏州艾思兰光电有限公司 一种移动式激光清洗及除锈设备
CN110919192A (zh) * 2019-12-26 2020-03-27 苏州吉格斯机械科技有限公司 刹车管双头激光去皮设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111843217A (zh) * 2020-09-11 2020-10-30 沈阳工业大学 可自适应加工表面的激光清洗与焊接装置及使用方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4867796A (en) * 1982-04-05 1989-09-19 Maxwell Laboratories, Inc. Photodecontamination of surfaces
EP0475806A2 (de) * 1990-09-12 1992-03-18 Framatome Laser-Arbeitsgerät, insbesondere für die Reinigung einer Leitung eines Nuclearreaktors
FR2689423A1 (fr) * 1992-04-01 1993-10-08 Valinox Dispositif et procédé permettant le nettoyage par faisceau laser de la paroi intérieure de tubes.
JPH1177308A (ja) * 1997-09-12 1999-03-23 Hitachi Ltd 溶接線検出方法およびその装置並びに溶接装置
JPH11216647A (ja) * 1998-02-03 1999-08-10 Mitsubishi Heavy Ind Ltd 研削装置
US6028316A (en) * 1996-08-28 2000-02-22 New Star Lasers, Inc. Method and apparatus for removal of material utilizing near-blackbody radiator means
JP2000246332A (ja) * 1999-02-24 2000-09-12 Nisshin Steel Co Ltd 拡管用溶接鋼管及びその製造方法
US20050150522A1 (en) * 2004-01-14 2005-07-14 Usui Kokusai Sangyo Kaisha Limited Method for removing resin layer from resin-coated metal tube

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4867796A (en) * 1982-04-05 1989-09-19 Maxwell Laboratories, Inc. Photodecontamination of surfaces
EP0475806A2 (de) * 1990-09-12 1992-03-18 Framatome Laser-Arbeitsgerät, insbesondere für die Reinigung einer Leitung eines Nuclearreaktors
FR2689423A1 (fr) * 1992-04-01 1993-10-08 Valinox Dispositif et procédé permettant le nettoyage par faisceau laser de la paroi intérieure de tubes.
US6028316A (en) * 1996-08-28 2000-02-22 New Star Lasers, Inc. Method and apparatus for removal of material utilizing near-blackbody radiator means
JPH1177308A (ja) * 1997-09-12 1999-03-23 Hitachi Ltd 溶接線検出方法およびその装置並びに溶接装置
JPH11216647A (ja) * 1998-02-03 1999-08-10 Mitsubishi Heavy Ind Ltd 研削装置
JP2000246332A (ja) * 1999-02-24 2000-09-12 Nisshin Steel Co Ltd 拡管用溶接鋼管及びその製造方法
US20050150522A1 (en) * 2004-01-14 2005-07-14 Usui Kokusai Sangyo Kaisha Limited Method for removing resin layer from resin-coated metal tube

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015192220A1 (en) * 2014-06-19 2015-12-23 Magna International Inc. Method and apparatus for laser assisted power washing
CN106413925A (zh) * 2014-06-19 2017-02-15 麦格纳国际公司 用于激光辅助动力清洗的方法和设备
US20170361403A1 (en) * 2014-06-19 2017-12-21 Magna International Inc. Method and Apparatus for Laser Assisted Power Washing
US10906130B2 (en) * 2014-06-19 2021-02-02 Magna International Inc. Method and apparatus for laser assisted power washing
CN110695008A (zh) * 2019-10-28 2020-01-17 苏州艾思兰光电有限公司 一种移动式激光清洗及除锈设备
CN110695008B (zh) * 2019-10-28 2021-12-24 苏州艾思兰光电有限公司 一种移动式激光清洗及除锈设备
CN110919192A (zh) * 2019-12-26 2020-03-27 苏州吉格斯机械科技有限公司 刹车管双头激光去皮设备

Also Published As

Publication number Publication date
BRPI0801317A2 (pt) 2009-04-28
JP2008284548A (ja) 2008-11-27
ITMI20070985A1 (it) 2008-11-17

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