WO2019030016A1 - Dispositif pour soudage laser manuel - Google Patents

Dispositif pour soudage laser manuel Download PDF

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Publication number
WO2019030016A1
WO2019030016A1 PCT/EP2018/070389 EP2018070389W WO2019030016A1 WO 2019030016 A1 WO2019030016 A1 WO 2019030016A1 EP 2018070389 W EP2018070389 W EP 2018070389W WO 2019030016 A1 WO2019030016 A1 WO 2019030016A1
Authority
WO
WIPO (PCT)
Prior art keywords
laser beam
focal spot
laser
workpieces
control 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.)
Ceased
Application number
PCT/EP2018/070389
Other languages
German (de)
English (en)
Inventor
Frank Riedel
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.)
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
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 Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV filed Critical Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Publication of WO2019030016A1 publication Critical patent/WO2019030016A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • B23K26/0096—Portable laser equipment, e.g. hand-held laser apparatus
    • 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
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/03—Observing, e.g. monitoring, the workpiece
    • B23K26/032—Observing, e.g. monitoring, the workpiece using optical means
    • 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
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
    • B23K26/044—Seam tracking
    • 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
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
    • 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
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/067—Dividing the beam into multiple beams, e.g. multi-focusing
    • 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
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding

Definitions

  • the invention relates to a device for laser welding, wherein the advancing movement of the laser beam is manually realized by an operator.
  • Laser welding has become established in many areas of the metalworking industry due to its many advantages (high productivity low heat input, low distortion, etc.).
  • the laser beam hits the operating point (focal spot diameter in focus, usual: 600, 300, 200, 100 ⁇ ⁇ ) with a high energy density on the operating point (focal spot diameter in focus, usual: 600, 300, 200, 100 ⁇ ⁇ ) with a high energy density on the operating point (focal spot diameter in focus, usual: 600, 300, 200, 100 ⁇ ⁇ ) with a high energy density on the operating point (focal spot diameter in focus, usual: 600, 300, 200, 100 ⁇ ⁇ ) with a high energy density on the operating point (focal spot diameter in focus, usual: 600, 300, 200, 100 ⁇ ⁇ ) with a high energy density on the operating point (focal spot diameter in focus, usual: 600, 300, 200, 100 ⁇ ⁇ ) with a high energy density on the operating point (focal spot diameter in focus, usual
  • the laser processing optics are still being mechanized (handling systems, robots, portals) and the laser welding systems are working at high speeds
  • Previously developed laser processing heads can be used if small dimensional requirements (eg.
  • the position of the weld joint (component edges of the parts to be welded) with respect to the position of the manual laser processing apparatus (head) with the respective position of the incident on the workpiece focal spot of the laser beam is determined by means of sensor technology.
  • at least one sensor element is used in / in a laser processing device.
  • the at least one sensor element is designed to detect the position of the focal spot on the workpiece surface.
  • a laser beam emitted from a laser radiation source is directed by a manually operable by an operator laser processing device in the joining region of workpieces.
  • Burning spots are fed to a control device.
  • the control device is designed so that a deflection of the position of the focal spot of the at least one laser beam to a predetermined position in the joining region of the workpieces along a predetermined weld seam profile can be achieved.
  • the laser processing device is a device that the
  • Deflection of the laser beam is formed in at least one axial direction exists. With this, a deflection of the position of the focal spot of the at least one laser beam is achieved to a predetermined position in the joining region of the workpieces along a predetermined weld line.
  • a sensor element can optically by online image analysis, using
  • Laser triangulation with a tactile sensor, contactless by the use of eddy current sensors or with an optical detector with a spatially resolved detection of the laser beam reflected back from the workpiece surface can be reached, the respective instantaneous position of the focal spot detect.
  • the respective position of the focal spot can be corrected if a deviation from a predetermined position along the weld seam course has been detected. This applies in particular to a deviation perpendicular to the current one
  • An incident laser beam can be deflected in the region of the welding joint by means of optical components so that the position of the incident focal spot of the laser beam, for example, with at least one movable, in particular rotatable about a Drehschse reflective element (mirror, eg galvanometer mirror) corrected so that the focal spot of the laser beam During the welding process always (during the entire manual / semi-mechanized movement of the laser processing device exactly to a predetermined position
  • a deflection can also be achieved with at least one tiltable optical element, which has two planar plane surfaces which are inclined or parallel to one another at a specific angle and by which the laser beam is directed onto the surface of the workpieces.
  • the tilting can be achieved, for example, with at least one piezoelectric element directly or via a lever system.
  • This method can also be designed so that unwanted manual position deviations of the laser processing device in the y direction
  • Angular deviations can be compensated automatically by a beam position correction and independently of the operator.
  • a system may be present, with which an operator can be informed in addition about generated visual and / or acoustic signals on the Korrektorverlauf when the deviations are greater than the deviations of the focal spot position, which can be compensated automatically by the described control device , With the invention it is possible for the first time, with manually guided
  • Laser processing equipment laser welding with a continuous accurate automatic beam positioning (regardless of the operator) to make.
  • Another potential of the invention is that the welding speed (manual feed) is independent of the manually achievable positioning accuracy of the operator and thus can be significantly increased.
  • the laser manual welding optics are extended by components that significantly increase the effective area / area of the laser beam on the workpiece and thus bridge technical gaps or deviations.
  • Deflection of the laser beam is formed in at least one axial direction exists.
  • the deflection should take place in at least one axial direction, which is at an angle of at least 10 ° with respect to the direction of the
  • Welding process is aligned at the respective position of the focal spot.
  • At least one optical element for beam shaping or beam splitting can be present, with which the
  • a beam splitter or a diffractive optical element can be present, with which a laser beam can be divided into a plurality of partial beams, which can be directed to the workpiece surface for welding.
  • Components oscillating (several hertz to kilohertz across to the welding direction) enable movement (oscillation, circular or elliptical) of the focal spot of the laser beam.
  • Components can be 1,2,3-D scanners, mechanical [using piezo actuators, electric drives with cams or similar, moving deflecting mirrors or galvanometer mirrors.
  • Positioning deviations can also be compensated for indirectly with the invention.
  • Laser beam positioning is no longer dependent on the manual guidance of the processing unit.
  • adjustable corridor are required. - Significant reduction of the requirements (tolerances) on the workpieces to be processed in manual laser beam welding by increasing the gap bridgeability.
  • Load capacity / strength can be increased.
  • oscillation frequency / amplitude of a pivotable reflecting element can be varied or regulated in addition to the weld width and the weld depth.

Landscapes

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

Abstract

L'invention concerne un dispositif pour le soudage laser de pièces dans lequel au moins un rayon laser émis par une source de rayonnement laser est orienté dans la zone d'assemblage de pièces par un appareil d'usinage laser pouvant être déplacé manuellement par un utilisateur. Au moins un élément capteur, qui est conçu pour détecter la position de la tache focale sur la surface de la pièce, est disposé sur et/ou dans le boîtier. Les signaux de position détectés par le ou les éléments capteur sont introduits dans un dispositif de régulation, le dispositif de régulation étant conçu de manière telle qu'une déviation de la position de la tache focale dudit au moins un rayon laser sur une position prédéfinie dans la zone d'assemblage de la pièce le long d'une allure prédéfinie du joint de soudure peut être atteinte. Un dispositif, qui est conçu pour la déviation du rayon laser dans au moins une direction d'axe, est disposé seul ou en plus dans ou sur l'appareil d'usinage laser, ladite au moins une direction d'axe étant orientée avec un angle d'au moins 10° par rapport à la direction de l'allure du joint de soudure au niveau de la position respective de la tache focale.
PCT/EP2018/070389 2017-08-10 2018-07-27 Dispositif pour soudage laser manuel Ceased WO2019030016A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017213942.0A DE102017213942B4 (de) 2017-08-10 2017-08-10 Vorrichtung zum Laserschweißen
DE102017213942.0 2017-08-10

Publications (1)

Publication Number Publication Date
WO2019030016A1 true WO2019030016A1 (fr) 2019-02-14

Family

ID=63042038

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/070389 Ceased WO2019030016A1 (fr) 2017-08-10 2018-07-27 Dispositif pour soudage laser manuel

Country Status (2)

Country Link
DE (1) DE102017213942B4 (fr)
WO (1) WO2019030016A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19519150A1 (de) * 1995-05-30 1996-12-12 Fraunhofer Ges Forschung Laserstrahlgerät und Verfahren zur Bearbeitung von Werkstücken
US6040550A (en) * 1996-10-28 2000-03-21 Chang; Dale U. Apparatus and method for laser welding the outer joints of metal bellows
DE102014015094A1 (de) * 2014-10-10 2016-04-14 Audi Ag Verfahren zum Laserstrahlschweißen
WO2016205805A1 (fr) * 2015-06-19 2016-12-22 Ipg Photonics Corporation Tête de soudage au laser dotée de doubles miroirs mobiles produisant un mouvement de faisceau

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10335501B4 (de) * 2002-07-31 2005-01-27 Kuka Schweissanlagen Gmbh Verfahren und Vorrichtung zum Schweißen oder Schneiden mit Laserstrahl

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19519150A1 (de) * 1995-05-30 1996-12-12 Fraunhofer Ges Forschung Laserstrahlgerät und Verfahren zur Bearbeitung von Werkstücken
US6040550A (en) * 1996-10-28 2000-03-21 Chang; Dale U. Apparatus and method for laser welding the outer joints of metal bellows
DE102014015094A1 (de) * 2014-10-10 2016-04-14 Audi Ag Verfahren zum Laserstrahlschweißen
WO2016205805A1 (fr) * 2015-06-19 2016-12-22 Ipg Photonics Corporation Tête de soudage au laser dotée de doubles miroirs mobiles produisant un mouvement de faisceau

Also Published As

Publication number Publication date
DE102017213942A1 (de) 2019-02-14
DE102017213942B4 (de) 2021-06-10

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