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EP2170550A1 - Dispositif et procédé de soudure au faisceau laser - Google Patents

Dispositif et procédé de soudure au faisceau laser

Info

Publication number
EP2170550A1
EP2170550A1 EP08774660A EP08774660A EP2170550A1 EP 2170550 A1 EP2170550 A1 EP 2170550A1 EP 08774660 A EP08774660 A EP 08774660A EP 08774660 A EP08774660 A EP 08774660A EP 2170550 A1 EP2170550 A1 EP 2170550A1
Authority
EP
European Patent Office
Prior art keywords
laser beam
workpiece
beam welding
movement
welding apparatus
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Withdrawn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
EP08774660A
Other languages
German (de)
English (en)
Inventor
Reiner Ramsayer
Sonja Kittel
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2170550A1 publication Critical patent/EP2170550A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/0869—Devices involving movement of the laser head in at least one axial direction
    • B23K26/0876—Devices involving movement of the laser head in at least one axial direction in at least two axial directions
    • B23K26/0884—Devices involving movement of the laser head in at least one axial direction in at least two axial directions in at least in three axial directions, e.g. manipulators, robots
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/0823—Devices involving rotation of the workpiece

Definitions

  • the invention relates to a laser beam welding apparatus according to the preamble of claim 1 and to a laser beam welding method according to the preamble of claim 10.
  • the laser beam is focused in the joining zone (welding zone) of two or more workpieces to be welded.
  • the absorption of the laser beam leads to heating and melting and often to partial evaporation of the material.
  • the welded connection is formed from the mixing of the melt occurring during the joining of several workpieces and the subsequent re-solidification of the material. Due to the local thermal expansion, possibly a structural transformation and the solidification of the material occurs undesirable delay, which can lead to the component consisting of the workpieces to shape and dimensional changes and thus to functional impairments and in the worst case to failure of the component.
  • welding dissimilar materials i. Different materials can cause cracks due to different thermal expansion coefficients during welding.
  • One approach to reducing component distortion is the homogeneous introduction of energy, i. a uniform symmetrical heating of the joining zone, as is known for example from DE 100 20 327 Al.
  • the invention has for its object to propose a laser beam welding apparatus, which is suitable for welding two metal workpieces. Furthermore, the object is to propose a correspondingly improved laser beam welding process.
  • the invention has recognized that the threshold speed from which a uniformly melted joining zone is formed depends on the component geometry, the melting temperature and the thermal conductivity of the material to be joined or the materials to be joined. Furthermore, the invention has recognized that as a result, depending on the material, a more or less large outflow of energy or heat in the Material results and in the joining zone use cooling and solidification. In addition, the invention has recognized that in order to generate or to obtain the molten state, the introduced energy flow must be at least as great as the outflowing energy flow.
  • the method using a laser scanner for metallic materials was not practical, since the higher thermal conductivity of metal and the associated higher energy loss by the outflow of heat into the component significantly faster speeds of the laser beam or the focal point are required than with A conventional laser scanner can be reached.
  • the basic idea is not only to move the focus of the laser beam along a predetermined path in a first direction of movement on a workpiece, or in the joining zone of at least two workpieces, but in addition to drive the workpiece or the workpieces in a second direction of movement, such that there is an increased relative speed between the focus of the laser beam and the or to be joined workpieces.
  • the laser beam welding method according to the invention provides for this drive means for driving the workpiece or the workpieces in the second direction of movement.
  • the drive means are designed and arranged such that they drive the at least one workpiece together with a corresponding fixing device for holding, ie fixing the at least one workpiece. Due to the increased relative speed between the focus of the laser beam and the workpiece or the joining region, a uniform heating along the entire joint region and thus a uniform Melting of the at least one workpiece can be realized.
  • the laser beam welding apparatus according to the invention and the laser beam welding method according to the invention are suitable for welding metallic workpieces, in particular of different metals or metal alloys.
  • laser beam sources can be used with a lower power output to achieve a certain welding depth than when welding workpieces with only a single run over. For example, the use of medium power CW lasers is possible.
  • Particularly high relative speeds between the focus of the laser beam and the at least one workpiece can be realized by moving the first direction of movement with which the laser beam is moved along the predetermined path in the joining area and the second direction of movement in which the workpiece or workpieces are moved. is driven / are opposite to each other, so the focus of the laser beam and the workpiece are moved in opposite directions.
  • the laser beam welding device or the laser beam welding method is particularly suitable for producing annular, ie circumferentially closed welds, wherein the welds to be generated, for example, on a flat surface, such as a workpiece front side or on the circumference of at least one workpiece can be generated.
  • the at least one workpiece is preferably driven in rotation with the drive means about an axis of rotation.
  • the axis of rotation about which the workpiece rotates along a, in particular, circulating path, in order to be able to uniformize the energy input even with complex workpiece geometries.
  • the web which is run over by the laser beam when the workpiece is driven in rotation, is not closed. This can be realized, for example, by turning off or deflecting the laser in a certain circumferential section.
  • the laser beam welding device is designed such that a circumferentially closed, ie annular, weld seam is produced is particularly preferred.
  • the path on which the focus of the laser beam moves is circular.
  • a circular-shaped track is particularly suitable for welding rotationally symmetrical workpieces.
  • the workpieces to be welded are preferably moved rotationally about a rotation axis.
  • the path along which the laser beam or the laser beam focus is movable in the joining region is programmable.
  • the path is programmed such that the path corresponds at least approximately to the contour of the workpiece - in particular taking into account the rotational movement of the workpieces.
  • the means for imaging the path of the laser beam focus on the circumference of the at least one workpiece as a cone mirror or parabolic Mirrors are formed or comprise a cone mirror and / or a parabolic mirror, wherein the cone mirror or the parabolic mirror, depending on whether the weld on the Au ⁇ z- or inner circumference of the workpieces is to be generated, is preferably designed as an inside or outside mirror.
  • a conical or parabolic mirror is advantageous; however, other geometric mirror shapes for deflecting the laser beam onto the circumference of the at least one workpiece can also be provided.
  • the shape of the means for imaging the sheet on the periphery in particular the shape of the conical mirror, or to the contour of the workpiece or of the workpieces to adapt the weld to be produced.
  • FIG. 1 shows a laser beam welding apparatus for producing a frontal weld
  • Fig. 2 shows a laser beam welding apparatus for generating a is arrange ⁇ th at the outer periphery of a workpiece and the weld seam
  • Fig. 3 shows a laser beam welding apparatus for generating a is arrange ⁇ th on the inner circumference of a workpiece weld.
  • a laser beam welding apparatus 1 comprises a laser scanner 2 with a laser beam source for generating a laser beam 3 and for moving, ie moving the laser beam 3 along a predetermined, in this embodiment frontal, annular path between a first workpiece 4 and a front, designed as a lid second Workpiece 10.
  • a laser beam welding apparatus 1 By means of the laser beam welding apparatus 1 shown, an annular, lying in a frontal plane weld between the workpiece 4, 10 can be generated.
  • the laser beam 3 or the focus 5 of the laser beam 3 is moved at a speed of approximately 60 m / min in a first direction of movement 6 in the counterclockwise direction in this exemplary embodiment.
  • the first workpiece 4, together with the second workpiece 10, is driven in a clockwise direction by means of drive means 7 about a rotation axis D in a second direction of movement 8, which is opposite to the first direction of movement 6.
  • the workpieces 4, 10 are melted homogeneously in the annular joining region 9.
  • both are the first Workpiece 4 and designed as a lid second workpiece 10 made of steel.
  • FIG. 2 shows an alternative laser beam welding device 1.
  • This comprises a laser scanner 2 for generating and processing a laser beam 3.
  • the laser beam 3 is driven in a counterclockwise direction in a first direction of rotation 6 rotating.
  • the laser beam 3, which is emitted approximately in the axial direction, strikes a cone mirror 11 with an inner cone and is deflected by the latter in the radial direction inwardly onto the outer circumference 12 of the first and the second workpiece 10, so that the focus 5 in the first movement direction 6 in the circumferential direction on the outer circumference 12 of the abutting workpieces 4, 10 moves.
  • the workpieces 4, 10 are rotatably rotated by means of drive means 7 about the axis of rotation D in a second direction of movement 8 in a clockwise direction.
  • the embodiment according to FIG. 3 essentially corresponds to the exemplary embodiment according to FIG. 2, with the difference that the laser beam 3 or its focus 5 on the inner periphery of the workpieces 4, 10 is moved counterclockwise along a first direction of movement 6.
  • a cone mirror 11 with an outer cone is arranged inside the hollow cylindrical workpieces 4, 10, so that the laser beam 3 impinging on the cone mirror 11 from the axial direction points radially outwards onto the inner circumference 14 in the joining region 9 in the contact region of the workpieces 4, 10 hits.
  • the workpieces 4, 13 are rotated by means of the drive means 7 rotationally into a second, the first direction of movement 6 opposite direction of movement 8 driven in a clockwise rotational direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Robotics (AREA)
  • Laser Beam Processing (AREA)

Abstract

La présente invention concerne un dispositif de soudure au faisceau laser (1) comprenant un dispositif de balayage laser (2) destiné à déplacer un faisceau laser (3) sur une première trajectoire dans une première direction de déplacement (6) sur au moins une pièce (4, 13). Selon l'invention, des éléments d'entraînement (7) servent à entraîner la pièce (4, 10) dans une deuxième direction de déplacement (8) afin d'augmenter la vitesse relative entre le faisceau laser (3) et la pièce (4, 10). L'invention concerne également un procédé de soudure au faisceau laser.
EP08774660A 2007-07-13 2008-07-02 Dispositif et procédé de soudure au faisceau laser Withdrawn EP2170550A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007032744A DE102007032744A1 (de) 2007-07-13 2007-07-13 Laserstrahlschweißvorrichtung und Laserstrahlschweißverfahren
PCT/EP2008/058526 WO2009010388A1 (fr) 2007-07-13 2008-07-02 Dispositif et procédé de soudure au faisceau laser

Publications (1)

Publication Number Publication Date
EP2170550A1 true EP2170550A1 (fr) 2010-04-07

Family

ID=39897308

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08774660A Withdrawn EP2170550A1 (fr) 2007-07-13 2008-07-02 Dispositif et procédé de soudure au faisceau laser

Country Status (6)

Country Link
US (1) US20100282722A1 (fr)
EP (1) EP2170550A1 (fr)
JP (1) JP5254330B2 (fr)
KR (1) KR20100035164A (fr)
DE (1) DE102007032744A1 (fr)
WO (1) WO2009010388A1 (fr)

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DE102007035717A1 (de) * 2006-12-27 2008-07-03 Robert Bosch Gmbh Laserstrahlschweißvorrichtung sowie Laserstrahlschweißverfahren
US8230594B1 (en) * 2009-05-09 2012-07-31 Bossard Peter R System and method for welding small diameter tubes into a high-density matrix
DE102009047096A1 (de) 2009-11-25 2011-05-26 Robert Bosch Gmbh Laserstrahlschweißvorrichtung und Laserstrahlschweißverfahren
DE102010002270A1 (de) 2010-02-24 2011-08-25 Robert Bosch GmbH, 70469 Verfahren und Vorrichtung zur Regelung einer Laserstrahlbearbeitungsvorrichtung
DE102010002335A1 (de) * 2010-02-25 2011-08-25 Robert Bosch GmbH, 70469 Fertigungseinrichtung zur Montage eines Magnetventils
DE102011013210A1 (de) * 2011-03-04 2012-09-06 Laser Zentrum Hannover E.V. Vorrichtung und Verfahren zum Bearbeiten wenigstens eines Werkstückes
JP5907718B2 (ja) * 2011-12-16 2016-04-26 三菱重工業株式会社 肉盛溶接方法
JP5849985B2 (ja) * 2013-04-15 2016-02-03 トヨタ自動車株式会社 溶接部の検査装置とその検査方法
US9039814B2 (en) 2013-04-18 2015-05-26 Saes Pure Gas, Inc. System and method for welding a plurality of small diameter palladium alloy tubes to a common base plate in a space efficient manner
JP6657558B2 (ja) * 2014-10-03 2020-03-04 日本製鉄株式会社 耐食性に優れた加工部品及びその製造方法
WO2016111705A1 (fr) * 2015-01-09 2016-07-14 Illinois Tool Works Inc. Système en ligne à base d'un laser et procédé de traitement thermique de produits continus
JP6627223B2 (ja) * 2015-02-05 2020-01-08 日本製鉄株式会社 耐食性に優れた加工部品の製造方法及びそれを実行する装置
EP3466601B1 (fr) * 2017-10-04 2024-06-12 Saint-Gobain Ecophon AB Procédé de fabrication d`un élément de profilé
WO2019197341A1 (fr) * 2018-04-10 2019-10-17 Talens Systems, S.L.U. Appareil et procédé de traitement de carton
EP3753668A1 (fr) * 2019-06-20 2020-12-23 BROEN POLAND sp.z.o.o. Procédé de fabrication d'une soupape à bille pour réguler un fluide, soupape à bille et outil de soudage pour maintenir et manipuler des pièces de soupape
US20230191531A1 (en) * 2020-06-04 2023-06-22 Nikon Corporation Processing apparatus
CN120421728B (zh) * 2025-07-07 2025-09-05 四川路桥盛通建筑工程有限公司 一种幕墙支撑结构的激光焊接装置

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JP3180412B2 (ja) * 1992-03-09 2001-06-25 松下電器産業株式会社 回転体のレーザ加工装置及びレーザ加工方法
DE4404141A1 (de) * 1994-02-09 1995-08-10 Fraunhofer Ges Forschung Vorrichtung und Verfahren zur Laserstrahlformung, insbesondere bei der Laserstrahl-Oberflächenbearbeitung
JP3233542B2 (ja) * 1995-02-14 2001-11-26 株式会社オーシーシー 金属管被覆光ファイバケーブルの製造方法及び製造装置
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Also Published As

Publication number Publication date
WO2009010388A1 (fr) 2009-01-22
JP5254330B2 (ja) 2013-08-07
DE102007032744A1 (de) 2009-01-15
US20100282722A1 (en) 2010-11-11
KR20100035164A (ko) 2010-04-02
JP2010533071A (ja) 2010-10-21

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