WO2008037310A1 - dispositif de protection de l'optique d'un dispositif d'usinage par laser doté d'au moins une tuyère disposée dans la zone d'un coin - Google Patents

dispositif de protection de l'optique d'un dispositif d'usinage par laser doté d'au moins une tuyère disposée dans la zone d'un coin Download PDF

Info

Publication number
WO2008037310A1
WO2008037310A1 PCT/EP2007/006329 EP2007006329W WO2008037310A1 WO 2008037310 A1 WO2008037310 A1 WO 2008037310A1 EP 2007006329 W EP2007006329 W EP 2007006329W WO 2008037310 A1 WO2008037310 A1 WO 2008037310A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle
protective device
compressed air
optics
base body
Prior art date
Application number
PCT/EP2007/006329
Other languages
German (de)
English (en)
Inventor
Reinhard Hölscher
Albrecht Kienemund
Simon Tölle
Original Assignee
Keysystech 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 Keysystech Gmbh filed Critical Keysystech Gmbh
Publication of WO2008037310A1 publication Critical patent/WO2008037310A1/fr

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
    • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B23K26/1462—Nozzles; Features related to nozzles
    • B23K26/1464—Supply to, or discharge from, nozzles of media, e.g. gas, powder, wire
    • B23K26/147—Features outside the nozzle for feeding the fluid stream towards the workpiece
    • 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
    • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B23K26/142—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor for the removal of by-products
    • 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
    • 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
    • B23K26/70—Auxiliary operations or equipment
    • B23K26/702—Auxiliary equipment

Definitions

  • the present invention relates to a protective device for the optics of a laser processing system with the features of the preamble of claim 1.
  • Laser processing equipment and in particular laser welding equipment are widely used in the industry for material processing.
  • the processing is generally carried out by the action of heat on the workpiece to be machined due to the high intensity of the focused laser beam.
  • the particular problem arises that molten liquid metal can escape at the processing point and strike the optics of the laser processing system in the form of spatters. These metal splashes lead to a reduced performance
  • BESTATfGUNGSKOPaE the processing device and eventually require the replacement of the optical device, which faces the processing site.
  • This is generally a protective glass.
  • the laser beam In laser beam processing devices, which are used at a small distance from the material to be processed (a few millimeters to centimeters), the laser beam in the field of focusing optics on a correspondingly small diameter.
  • the protection of the optics is ensured by a concentric nozzle, which directs a compressed air stream or a protective gas stream coaxially in the direction of the laser beam on the workpiece.
  • a concentric nozzle which directs a compressed air stream or a protective gas stream coaxially in the direction of the laser beam on the workpiece.
  • Such coaxial nozzles have a high compressed air consumption and emit a noise level of about 90 dB (A).
  • the distance between the focusing optics and the workpiece is much greater. It can be in the range of around 80 cm.
  • the diameter of the focusing optics is accordingly large and is 15-20 cm.
  • the solution disclosed in the abovementioned patent application is impractical because the volume to be flowed through is too large.
  • Laser processing devices is therefore an air jet emitted transversely to the laser beam, a so-called.
  • Crossjet used.
  • a crossjet protects the optics behind it from the processing point.
  • the compressed air consumption and the noise emission are disadvantageous because of the high airspeed required.
  • the protective device for the optical system of a laser processing apparatus is provided with a base body surrounding a passage opening for a laser beam having a main emission direction, and an air passage arranged in the base body communicating with a pressure-source, and further the base body is one of the passage opening facing inner lateral surface and at least one nozzle arranged in a corner region, which communicates on the one hand with the air duct and the other with the outer space, wherein the nozzle is aligned at an acute angle to the lateral surface in the direction of the main emission direction, in addition to the actual compressed air flow is still a sheath flow designed, which increases the effectiveness and thus reduces the compressed air demand. At the same time a lower noise emission is achieved.
  • the nozzle is formed by two coaxial inclined surfaces, which are arranged at a free distance from each other and which are aligned at an angle of 20 ° to 45 ° to the inner circumferential surface, the effect is particularly good.
  • An advantageous construction results when the main body carries a cover ring, and these components together form the outer shape of a symmetrical to the main emission direction ring with a substantially rectangular cross-section, wherein the nozzle is disposed in an inner corner facing away from the optics.
  • the nozzle preferably has a gap height of 0.05 to 0.2 mm. To adapt to different purposes, the gap height is advantageously adjustable by selecting a seal with the appropriate thickness.
  • the inner sheath flow is reliably formed when the nozzle is arranged in a distance from the optical system which can be traversed by ambient air, the distance advantageously being 10 mm to 50 mm.
  • At least one connection preferably a plurality of evenly distributed over the circumference of the body terminals for the supply of compressed air are provided, wherein the compressed air has a pressure of 1 bar to 4 bar, preferably about 1.5 bar.
  • Figure 1 A protective device with a cross section from the side; such as
  • FIG. 2 shows a protective device according to FIG. 1 in a perspective explanatory diagram.
  • FIG. 1 shows a protective device 1 in a cross-section from the side.
  • the protective device 1 comprises an annular nozzle housing 2 with compressed air connections 3.
  • the nozzle housing 2 is essentially formed by an annular base body 4 and also a ring-shaped cover ring 5.
  • the base body 4 and the cover ring 5 enclose an annular channel 6, which is formed circumferentially in the interior of the nozzle 2.
  • An annular nozzle opening 7 is formed by the base body 4 and the cover ring. 5 limited .
  • the nozzle 2 is constructed as follows:
  • the main body 4 is rotationally symmetrical. It has the structure of a ring with a flat end face 10 located at the top in FIG. 1 and an inner lateral surface 11 extending at right angles thereto and an outer lateral surface 12 likewise oriented at right angles to the flat end face 10.
  • the channel 6 is formed by a recess extending in the circumferential direction in the form of a circumferential groove open in FIG. The walls of the recess extending parallel to the lateral surfaces 11 and 12 and to the front side 10. It results in a total of an approximately rectangular cross-section of the channel 6.
  • the channel 6 is in the main body 4 opposite the flat end 10 open on one side.
  • the wall of Grundk ⁇ rpcrs 4 wci3t in the region of the outer circumferential surface 12 a total of 4 through threaded holes 13, which are distributed over the circular circumference at the same angular distance of 90 °.
  • the threaded holes 13 pass through the outer circumferential surface 12 and establish a connection between the outer space and the channel 6 ago.
  • the compressed air connections 3 are screwed into the threaded holes.
  • the main body 4 has at the free ends of the limited by the inner circumferential surface 11 and the outer circumferential surface 12 legs on a different rectangular cross-section structure.
  • an annular recess 14 is formed, which serves as a rotationally symmetrical seat for the cover ring 5.
  • a slope 15 is formed, which is inclined relative to the inner circumferential surface 11 by about 30 ° and starting from the full cross section of the inner wall of the main body. 4 extends inwardly on the inner circumferential surface 11. Overall, thereby a cross-sectional peak circumferential edge is formed where the inner circumferential surface 11 and the inclined surface 15 meet.
  • the cover ring 5 is substantially planar and has approximately the same wall thickness as the base body 4 in the region of the inner jacket surface 11. At its outer periphery, the end face facing the base body 4 is provided with a peripheral web 16, which is complementary to the recess 14 is. The recess 14 and the web 16 cause accurate centering of the cover ring 5 on the body.
  • the cover ring 5 further limits the channel 6, which is formed in the base 4 open on one side.
  • the side facing the base 4 of the cover ring 5 tapers from the end face to the inner free end at an angle of about 60 ° relative to the radially flat end face.
  • An inclined surface 17 is formed which runs approximately parallel to the inclined surface 15 and which, together with the inclined surface 15, delimits the nozzle opening 7.
  • FIG. 2 shows the protective device described so far in an exploded view. Same components bear the same reference numbers.
  • the basic body 4 and the cover ring may be assembled 5 with the interposition of an annular gasket 20 ".
  • the base body 4 a number of threaded bores 21 which are uniformly distributed over the circumference and extending parallel to the axial direction
  • the cover ring 5 has a corresponding number of through bores 22 into which threaded screws 23 for fastening the cover ring 5 to the base body 4 can be inserted outer free leg of the main body 4 is arranged.
  • the inner free leg, which defines the inclined surface 15, is free of holes.
  • the through holes 22 do not enforce the inclined surface 17 of the cover ring fifth
  • the protective device 1 In the assembled state, the protective device 1 then assumes the annular, rotationally symmetrical and provided with an approximately square outer cross-sectional shape, which is shown in the figure 1.
  • the nozzle opening 7 is defined in its free cross section by the relative position of the inclined surfaces 15 and 17, but in particular by the material thickness of the seal 20. By changing the seal 20, the free cross section of the nozzle 7 can be adjusted if necessary.
  • the compressed air connections 3 are connected to a compressed air source not shown in the drawing in connection, is fed by the compressed air in the annular peripheral channel 6. The compressed air can emerge from there evenly from the nozzle 7 ..
  • This air jet is illustrated in the figure 1 by the reference numeral 8. It forms due to the overall rotationally symmetrical structure as a cone-shaped on the symmetry axis and thus to a main emission direction 9 of the laser beam tapered air flow.
  • the air jet When meeting the individual flow paths that emerge from the nozzle opening 7, the air jet is deflected in the total coincident with the main emission direction 9 axial direction to the processing site, since the individual flow paths of the air jet 8 can not penetrate smoothly.
  • Next ambient air is attracted in the direction of the exiting air jet immediately adjacent to the nozzle opening 7, since there is a negative pressure in the air jet 8 due to the higher speed compared to the ambient pressure.
  • the air jet 8 is coated in this way on both sides in the manner of a sheath current of ambient air. This formation of a sheath current inside and outside around the air jet 8 causes on the one hand an increase in the volume flow generated, on the other hand, however, also a reduction of the noise emission.
  • the dimensioning of the protective device provides in a preferred embodiment that the exit angle of the compressed air from the nozzle opening 7 is 30 ° against the axis of symmetry.
  • the inner diameter is 195 mm, so that the protective device has a sufficient clear width to the exit window of a laser scanner for the so-called.
  • Remote welding offers, which has a diameter of 180 mm.
  • the height of the nozzle channel 7 transverse to the flow of the compressed air is 0.05 mm.
  • the nozzle channel 7 itself has measured in the circumferential direction has a length of about 613 mm.
  • the free cross section is thereby 31 mm 2 .
  • the approximately quadrilateral cross section which is delimited by the flat side 10 and the lateral surfaces 11 and 12, has a trough of about 30 mm each.
  • the protective device is mounted at a distance of 30-50 mm from the protective glass of a laser scanner. This distance ensures that sufficient air can flow through the inner free cross section past the inner circumferential surface 11 into the air jet 8.
  • the generated sheath flow is sufficient to keep occurring at the processing point liquid metal away from the protective glass of the laser scanner.
  • the noise emission is only 69 dB (A) in a test arrangement with a width of the nozzle channel 7 of 0.1 mm and a compressed air supply into the channel 6 with a pressure of 1.5 bar.
  • the air consumption is 30 m 3 per hour.
  • a major advantage in operation is that compared to the known with compressed air operated protection devices, the noise emission could be lowered so far that working next to the protection without hearing protection is possible and permissible. Furthermore, a considerable reduction in the compressed air requirement has been achieved, which represents a considerable cost saving in operation due to the generally high costs for the provision of compressed air in the quantities required according to the prior art.
  • main emission direction 10. flat face

Landscapes

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

Abstract

L'invention concerne un dispositif de protection (1) de l'optique d'un dispositif d'usinage par laser, qui présente un corps de base (4) qui entoure une ouverture de passage d'un faisceau laser qui présente une direction principale d'émission (9) ainsi qu'un canal d'air (6) disposé dans le corps de base (4) et relié à une source d'air sous pression. On obtient une diminution de la consommation en air sous pression et en même temps une diminution de l'émission de bruit par le fait que le corps de base (4) présente une surface d'enveloppe intérieure (11) tournée vers l'ouverture de passage et au moins une tuyère (7) disposée dans la zone d'un coin et qui communique d'une part avec le canal d'air (6) et d'autre part avec l'espace extérieur. La tuyère (7) est orientée sous un angle aigu par rapport à la surface d'enveloppe, dans la direction principale d'émission (9).
PCT/EP2007/006329 2006-09-25 2007-07-17 dispositif de protection de l'optique d'un dispositif d'usinage par laser doté d'au moins une tuyère disposée dans la zone d'un coin WO2008037310A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006045554A DE102006045554A1 (de) 2006-09-25 2006-09-25 Schutzvorrichtung für die Optik eines Laserschweißscanners
DE102006045554.1 2006-09-25

Publications (1)

Publication Number Publication Date
WO2008037310A1 true WO2008037310A1 (fr) 2008-04-03

Family

ID=38626826

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/006329 WO2008037310A1 (fr) 2006-09-25 2007-07-17 dispositif de protection de l'optique d'un dispositif d'usinage par laser doté d'au moins une tuyère disposée dans la zone d'un coin

Country Status (2)

Country Link
DE (1) DE102006045554A1 (fr)
WO (1) WO2008037310A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104736289A (zh) * 2012-09-21 2015-06-24 通快激光有限责任公司 激光加工头和用于激光加工头的环形喷嘴

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5609500B2 (ja) 2010-10-01 2014-10-22 スズキ株式会社 レーザ溶接装置
DE102012025627B4 (de) * 2012-09-21 2016-04-14 Trumpf Laser Gmbh Ringdüse für einen Laserbearbeitungskopf und Laserbearbeitungskopf damit
FR3054971B1 (fr) * 2016-08-12 2019-01-25 Accelinn Procede de protection, par soufflage fluidique, d'un appareil d'emission et/ou de reception des ondes electromagnetiques, dispositif convenant a sa mise en œuvre et un tel appareil equipe dudit dispositif
DE102022208240A1 (de) * 2022-08-08 2024-02-08 Adient Us Llc LUFTFÜHRUNGSVORRICHTUNG ZUR SPRITZERREDUKTION UND SPRITZERABLENKUNG BEIM LASERSTRAHLSCHWEIßEN UND SCHWEIßVORRICHTUNG

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4324972A (en) * 1979-11-21 1982-04-13 Laser-Work A.G. Process and device for laser-beam melting and flame cutting
US4723063A (en) * 1985-04-16 1988-02-02 Rofin-Sinar Laser Gmbh Laser welding apparatus
DE3637568A1 (de) * 1986-11-04 1988-05-05 Trumpf Gmbh & Co Laser-bearbeitungsmaschine
DE4118693A1 (de) * 1991-06-07 1992-12-10 Kugler Gmbh Feinmechanik & Opt Bearbeitungskopf fuer eine vorrichtung zum schneiden von werkstuecken mit licht- oder teilchenstrahlen
US5786561A (en) * 1994-01-25 1998-07-28 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. Nozzle assembly for laser beam cutting
DE10160785C1 (de) * 2001-12-11 2003-08-28 Blz Gmbh Begasungsdüseneinheit für den Bearbeitungskopf einer Laser-Schweißeinrichtung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3822097A1 (de) * 1988-06-30 1990-01-04 Messer Griesheim Gmbh Verfahren zum ablenken von in richtung zur optik einer laserduese bewegten partikeln
DE19962625A1 (de) * 1999-01-01 2000-07-06 Linde Tech Gase Gmbh Verfahren und Vorrichtung zur Lasermaterialbearbeitung unter Schutzgas mit unterschiedlichem Volumenstrom als Optikschutz
EP1658921B1 (fr) * 2004-11-17 2017-01-18 TRUMPF Laser GmbH Appareil de soudage laser pour un laser à haute puissance avec faisceau de haute qualité et optique focale de longue distance focale

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4324972A (en) * 1979-11-21 1982-04-13 Laser-Work A.G. Process and device for laser-beam melting and flame cutting
US4723063A (en) * 1985-04-16 1988-02-02 Rofin-Sinar Laser Gmbh Laser welding apparatus
DE3637568A1 (de) * 1986-11-04 1988-05-05 Trumpf Gmbh & Co Laser-bearbeitungsmaschine
DE4118693A1 (de) * 1991-06-07 1992-12-10 Kugler Gmbh Feinmechanik & Opt Bearbeitungskopf fuer eine vorrichtung zum schneiden von werkstuecken mit licht- oder teilchenstrahlen
US5786561A (en) * 1994-01-25 1998-07-28 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. Nozzle assembly for laser beam cutting
DE10160785C1 (de) * 2001-12-11 2003-08-28 Blz Gmbh Begasungsdüseneinheit für den Bearbeitungskopf einer Laser-Schweißeinrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104736289A (zh) * 2012-09-21 2015-06-24 通快激光有限责任公司 激光加工头和用于激光加工头的环形喷嘴

Also Published As

Publication number Publication date
DE102006045554A1 (de) 2008-04-03

Similar Documents

Publication Publication Date Title
EP0741627B1 (fr) Ensemble buse pour le decoupage au laser
DE69304335T2 (de) Vorrichtung zum mischen von zwei flüssigkeiten mit unterschiedlicher temperatur
DE69326624T2 (de) Plasmabrenner
DE4310762C2 (de) Plasmabrennerdüse
WO2008037310A1 (fr) dispositif de protection de l'optique d'un dispositif d'usinage par laser doté d'au moins une tuyère disposée dans la zone d'un coin
DE202016100923U1 (de) Schweißvorrichtung mit Schutzgasführung
DE102019103248A1 (de) Laserbearbeitungskopf mit der Funktion des Gleichrichtens von Hilfsgas
DE102016106960A1 (de) Vorrichtung zur Bearbeitung einer Oberfläche eines Werkstücks mit einem Laserstrahl und Verfahren zum Betrieb der Vorrichtung
DE102014103635C5 (de) Unterdruckkammer mit einem Schutzgehäuse
DE10035622C2 (de) Pulverbeschichtungskopf
DE102013214925A1 (de) Einhausung für einen Strahlengang, Bearbeitungskammer und Verfahren zur Laserbearbeitung
DE3630127C2 (fr)
EP0515449B1 (fr) Dispositif de coupe et de nettoyage d'objets au moyen d'un melange d'eau et d'un produit abrasif sous une haute pression environnante
EP3233358B1 (fr) Dispositif d'alimentation d'un dispositif de soudage en gaz de traitement et fil d'apport
EP2531320A1 (fr) Buse pour un chalumeau de coupe à plasma refroidi par liquide munie de rainures
EP0432521A1 (fr) Méthode pour couper des matériaux
EP2487003B1 (fr) Pistolet soudeur d'un appareil de soudure à arc
DE19608485C2 (de) Düsenkopf einer Minimalmengen-Kühlschmiervorrichtung
DE1774446C3 (de) Nach dem Düse-Prallplatte-Prinzip arbeitende pneumatische Tastvorrichtung
DE102015013847A1 (de) Laserschweißeinrichtung
DE102018131886B3 (de) Vorrichtung zur Strömungsführung eines Prozessmediums für eine Laserbearbeitungsvorrichtung
EP1543910B1 (fr) Ajutage de soudage
DE3645047C2 (en) Cutting nozzle for laser or electron beam gun
DE60311179T2 (de) Anschlageinrichtung für einen Plasmabrenner
DE4200948A1 (de) Vorrichtung zum lichtbogenschweissen und -schneiden

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07786125

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 07786125

Country of ref document: EP

Kind code of ref document: A1