WO2015032719A1 - Beam-assisted joining machine, in particular laser transmission welding device having a clamping means formed by a flexible clamping hose - Google Patents

Beam-assisted joining machine, in particular laser transmission welding device having a clamping means formed by a flexible clamping hose Download PDF

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Publication number
WO2015032719A1
WO2015032719A1 PCT/EP2014/068513 EP2014068513W WO2015032719A1 WO 2015032719 A1 WO2015032719 A1 WO 2015032719A1 EP 2014068513 W EP2014068513 W EP 2014068513W WO 2015032719 A1 WO2015032719 A1 WO 2015032719A1
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WO
WIPO (PCT)
Prior art keywords
clamping
components
joining
hose
machine according
Prior art date
Application number
PCT/EP2014/068513
Other languages
German (de)
French (fr)
Inventor
Michael Bauer
Sebastian Loy
Stefan Schlauderer
Original Assignee
Lpkf Laser & Electronics Ag
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 Lpkf Laser & Electronics Ag filed Critical Lpkf Laser & Electronics Ag
Publication of WO2015032719A1 publication Critical patent/WO2015032719A1/en

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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
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0426—Fixtures for other work
    • 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
    • B23K15/00—Electron-beam welding or cutting
    • B23K15/0046—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
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding
    • B23K26/30—Seam welding of three-dimensional seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/061—Arrangements for positively actuating jaws with fluid drive
    • B25B5/065—Arrangements for positively actuating jaws with fluid drive involving the use of flexible pressure bags or diaphragms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/301—Three-dimensional joints, i.e. the joined area being substantially non-flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81266—Optical properties, e.g. transparency, reflectivity
    • B29C66/81267—Transparent to electromagnetic radiation, e.g. to visible light
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81455—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps being a fluid inflatable bag or bladder, a diaphragm or a vacuum bag for applying isostatic pressure
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/006—Vehicles
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/18—Sheet panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/0026—Transparent
    • B29K2995/0027—Transparent for light outside the visible spectrum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/747—Lightning equipment

Definitions

  • German Patent Application 10 2013 217 647.3 is incorporated herein by reference.
  • the invention relates to a beam-assisted joining machine and in particular a laser transmission welding device with the in the preamble of
  • Such joining machines can also be realized by laser butt welding, laser soldering or the like in addition to the aforementioned laser beam welding.
  • a holder of the inner clamping punch on a transparent glass plate is known.
  • This type of tensioning device is problematic for a three-dimensionally extending joint seam, since then the frame-shaped inner clamping jaws or the individual clamping jaws which grip from the outside inwards become very complicated in terms of their mounting and construction.
  • a disadvantage of the use of the above-described stamp clamping technique in combination with the contour welding method is also the relatively poor gap bridging. This is due to the fact that the clamping die is in full-surface contact with the component, but the material is plasticized only at certain points.
  • DE 101 33 956 AI discloses a clamping device for laser soldering or laser welding, in which there is a so-called geometry clamping means is provided which has a shape adapted to the contour of the respective component.
  • a negative pressure which is generated in particular by a plurality of individual suction cups, the component applies against a surface of the mold non-positively and flat.
  • the disclosed clamping device is also very complex and problematic due to the suction cups used in the tension of components with three-dimensional running joint seam.
  • Another problem area is the necessary constant distribution of the clamping force along the weld during laser welding of plastics. If the manufacturing tolerances of the component holder on the one hand and the machined, for example, injection-molded components on the other hand taken into account, it is difficult to ensure a constant distribution of clamping force.
  • the "rigid" clamping technique described in the prior art does not permit any melting path when using a contour welding process. The reason for this is that in this variant of the method the laser beam is guided relatively slowly along the welding contour, whereby only a very small area of the seam is constantly used melted, the surrounding, unplasticized areas prevent setting of the transparent, upper member relative to the lower.
  • the tensioning means is formed by a flexible tensioning hose which acts on the two components and is arranged with its cross section between the tensioning frame and the components.
  • the clamping force on the components is generated by applying a pressure fluid to the tube volume.
  • the function of the component voltage is thus taken over by a flexible component in the form of the clamping tube, which ensures a very uniform distribution of the clamping force across the components.
  • This hose technology also protects the components to a particular degree, because the clamping force is applied over the entire clamping zone by means of a flexible element. Due to the flexibility of this clamping means and no exactly adapted to the shape of the components to be clamped clamping means must be provided. It is sufficient if the tension hose to a roughly the shape of the components to be clamped following tenter is attached. Incidentally, the latter can also be designed as a transparent lid for the joining beam.
  • the flexibility of the tension hose also brings with it the advantage that setting paths of the components can proceed unhindered during the joining. Thus, also component tolerances can be better compensated.
  • the tensioning tube In order to make it possible to join the components even in the region of the components covered by the tensioning tube, the tensioning tube consists of a material transmissive to the joining beam. Compressed air as compressed air is an advantage since it is also highly transmissive to the joining jet and is usually available as a working medium at production sites.
  • the tension hose is preferably made of an elastic material, so that uniform tensioning properties are ensured even over a longer service life of the joining machine.
  • a high elasticity with simultaneous resistance to higher process temperatures is beneficial for the tubing.
  • FIG. 1 shows a section through a tensioning device with a schematically illustrated jet head
  • Fig. 2 is a perspective view of the clamping device in the closed state
  • Fig. 3 is a schematic sectional view of the clamping device according to the
  • the laser transmission beam shown as an example for a beam-supported joining machine has Welding device on a jet head 1, to which a laser beam, not shown, a laser beam L suitable for conventional transmission welding is brought to.
  • the jet head 1 is - as also not shown in detail - performed by a corresponding multi-axis handling device according to the three-dimensional contour of the weld 5 to be produced (see Fig. 3) between the two held in the clamping device 2 components 3, 4 of a product designed as a hollow body ,
  • This product may be, for example, a tail lamp unit of a motor vehicle, wherein the first component 3 is formed by the rear housing of the lamp.
  • This housing consists of a laser-absorbing material, whereas the laser-transmissive and translucent cover of the luminaire forms the second component 4.
  • the two components 3, 4 are acted upon for welding in the clamping device 2 with a corresponding clamping force F in order to produce a perfect, continuous joint seam in the form of a weld 5 (see FIG. 3) between the two components.
  • the lower, housing-like component 3 is thereby inserted into a receptacle 6 of the clamping device 2 in a defined position.
  • the receptacle 6 a the component 3 in the form adapted receiving opening 7, the bottom 8 serves as a support surface for the component 3.
  • the tensioning hose extends with its cross section between the clamping frame designated as a whole by 1 1 and the components 3, 4 formed by the frame cover 12.
  • the clamping hose 9 designed as a circumferential annular hose is-as indicated in FIG. 3-provided with a connection 15 for a compressed-air line 16, which-as is indicated schematically in FIG. 1-is connected to a suitable compressed-air source 17.
  • a suitable compressed-air source 17 By applying the hose lumen SL with compressed air, the clamping force F is now applied to the components 3, 4.
  • the frame cover 12 itself is hinged on a narrow side via integrally formed bearing flanges 18 on a bearing block 19 on the receptacle 6 by means of the bearing pin 20 pivotally.
  • the bearing pin 20 is secured on both sides with locking rings, not shown in its mounting position shown in Fig. 2.
  • the bearing block 19 is bolted four times with the receptacle 6.
  • a quick-release closure 21 is provided with an actuating handle 22, a retaining clip 23 pivotally mounted thereto and a hook 24 on the frame cover 12.
  • the quick-release shutter 21 is based in its function on a conventional over-center kinematic.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Plasma & Fusion (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Laser Beam Processing (AREA)

Abstract

The invention relates to a beam-assisted joining machine, in particular a laser transmission welding device, comprising a beam head (1) for providing a joining beam (L) that produces a weld (5) between two components (3, 4), a holder (6) for supporting the first component (3), a clamping device (2) for clamping the components (3, 4), in particular for clamping components (3, 4) having a weld (5) extending in three dimensions, which clamping device (2) has a clamping frame (11) that cooperates with the holder (6) and has a clamping means for producing a clamping force (F) between the two components (3, 4) at least in the region of the particular joining zone to which the joining beam (L) is applied, and a flexible clamping hose (9), which acts on the two components (3, 4) as a clamping means and is arranged the cross-section of the clamping hose between the clamping frame (11) and the components (3, 4) and the clamping force (F) of which is produced by introducing a pressure fluid into the hose lumen (SL).

Description

STRAHLGESTÜTZTE FÜGEMASCHINE, INSBESONDERE LASER-DURCHSTRAHL-SCHWEISSEINRICHTUNG MIT EINEM DURCH EINEN FLEXIBLEN SPANNSCHLAUCH GEBILDETEN SPANNMITTEL  BEAM-SUPPORTED SLOT MACHINE, ESPECIALLY LASER RADIATION WELDING DEVICE WITH A SPANNER SHAPED BY A FLEXIBLE SPANNING TUBE
Der Inhalt der deutschen Patentanmeldung 10 2013 217 647.3 wird durch 5 Bezugnahme hierin aufgenommen. The content of German Patent Application 10 2013 217 647.3 is incorporated herein by reference.
Die Erfindung betrifft eine strahlgestützte Fügemaschine und insbesondere eine Laser-Durchstrahl-Schweißeinrichtung mit den im Oberbegriff des The invention relates to a beam-assisted joining machine and in particular a laser transmission welding device with the in the preamble of
Patentanspruches 1 angegebenen Merkmalen.  Claim 1 features specified.
10  10
Derartige Fügemaschinen können neben der erwähnten Laser-Durchstrahl- Schweißeinrichtung auch durch Laser-Stumpfschweiß-, Laser-Löt-Anlagen oder dergleichen realisiert werden.  Such joining machines can also be realized by laser butt welding, laser soldering or the like in addition to the aforementioned laser beam welding.
15 Wie beispielsweise aus der DE 10 2007 042 739 AI bekannt ist, weisen As is known, for example, from DE 10 2007 042 739 A1
strahlgestützten Fügemaschinen einen Strahlkopf zur Bereitstellung eines die Fügenaht zwischen den beiden Bauteilen erzeugenden Fügestrahls, eine Aufnahme zur Lagerung eines ersten Bauteils und eine Spannvorrichtung zum Spannen der beiden Bauteile auf. Bei der Spannvorrichtung gemäß der 0 vorgenannten Druckschrift ist ein Innenspannstempel vorgesehen, der die  beam-assisted joining machines, a jet head for providing a connecting seam between the two components generating joining beam, a receptacle for mounting a first component and a clamping device for clamping the two components. In the clamping device according to the above-mentioned document 0 an inner clamping punch is provided which the
Spannkraft in die von der Schweißnaht umrandete Fläche einleitet. Eine andere Ausführungsform - die oben bereits erwähnte DCD-Technik - dieser Spannvorrichtung beruht auf dünnen Stegen, die einen Außenspannrahmen mit dem Innenspannstempel mechanisch verbinden. Dabei ergibt sich zwi- 5 sehen Außen- und Innenspanntechnik ein hinreichender Spalt um die  Clamping force in the area bordered by the weld initiates. Another embodiment - the above-mentioned DCD technique - this tensioning device is based on thin webs that mechanically connect an outer clamping frame with the inner clamping punch. In this case, there is a sufficient gap between the outer and inner clamping technology
Schweißnaht auszubilden. Auch eine Halterung des Innenspannstempels über eine transparente Glasplatte ist bekannt. Problematisch ist diese Art von Spannvorrichtung für eine dreidimensional verlaufende Fügenaht, da dann der rahmenförmige Innenspannbacken bzw. die von außen nach innen greifenden, einzelnen Spannbacken in ihrer Lagerung und Konstruktion sehr aufwändig werden. Nachteilig bei der Ver- wendung der oben erläuterten Stempelspanntechnik in Kombination mit dem Konturschweißverfahren ist ferner die verhältnismäßig schlechte Spaltüberbrückbarkeit. Diese kommt dadurch zustande das der Spannstempel in vollflächigem Kontakt zum Bauteil steht, das Material jedoch nur punktuell plastifiziert wird. Form weld. A holder of the inner clamping punch on a transparent glass plate is known. This type of tensioning device is problematic for a three-dimensionally extending joint seam, since then the frame-shaped inner clamping jaws or the individual clamping jaws which grip from the outside inwards become very complicated in terms of their mounting and construction. A disadvantage of the use of the above-described stamp clamping technique in combination with the contour welding method is also the relatively poor gap bridging. This is due to the fact that the clamping die is in full-surface contact with the component, but the material is plasticized only at certain points.
Die DE 101 33 956 AI offenbart eine Spannvorrichtung zum Laserlöten oder Laserschweißen, bei der ein dort so bezeichnetes Geometriespannmittel vorgesehen ist, das eine der Kontur des jeweiligen Bauelementes angepasste Form aufweist. Durch einen Unterdruck, der insbe- sondere durch eine Vielzahl einzelner Saugnäpfe erzeugt wird, legt sich das Bauelement gegen eine Oberfläche der Form kraftschlüssig und flächig an. Die offenbarte Spannvorrichtung ist dabei ebenfalls sehr komplex und aufgrund der verwendeten Saugnäpfe problematisch bei der Spannung von Bauteilen mit dreidimensional verlaufender Fügenaht. DE 101 33 956 AI discloses a clamping device for laser soldering or laser welding, in which there is a so-called geometry clamping means is provided which has a shape adapted to the contour of the respective component. By a negative pressure, which is generated in particular by a plurality of individual suction cups, the component applies against a surface of the mold non-positively and flat. The disclosed clamping device is also very complex and problematic due to the suction cups used in the tension of components with three-dimensional running joint seam.
Die DE 100 60 394 AI offenbart eine Vorrichtung zur Fixierung von mittels eines Lasers zu schweißenden Bauteilen. Dabei sind die Spannbacken aus einem für den Laserstrahl transmissiven Werkstoff gefertigt. Zum aktuellen Stand der Spanntechnik ist festzuhalten, dass hauptsächlich die oben bereits erwähnten Innenspannstempel zum Einsatz kommen, die als dreidimensionale Negativ-Formen des oberen Bauteils ausgeführt sind. Diese haben verschiedene Nachteile, wie beispielsweise die mit ihrer Herstellung verbundenen hohen Kosten. Ferner können empfindliche Oberflächen der zu verbindenden Bauteile ein Problem darstellen. Dann müssen bei den bekannten Spanntechniken besondere Vorkehrungen getroffen werden, um eine Kratzerbildung an den Werkstücken zu vermeiden. DE 100 60 394 AI discloses a device for fixing by means of a laser to be welded components. The jaws are made of a material transmissive to the laser beam. As far as the current state of the clamping technology is concerned, it should be noted that mainly the above-mentioned inner clamping punches are used, which are designed as three-dimensional negative forms of the upper component. These have several disadvantages, such as the high cost associated with their manufacture. Furthermore, sensitive surfaces of the components to be joined can be a problem. Then special precautions must be taken in the known clamping techniques to prevent scratching of the workpieces.
Ein weiteres Problemfeld ist die notwendige konstante Verteilung der Spannkraft entlang der Schweißnaht beim Laserschweißen von Kunststoffen. Werden die Fertigungstoleranzen der Bauteilaufnahme einerseits und die der zu bearbeitenden, beispielsweise spritzgegossenen Bauteile andererseits berücksichtigt, so ist die Sicherstellung einer konstanten Spannkraftverteilung schwierig. Auch lässt die im Stand der Technik beschriebene„starre" Spanntechnik bei der Verwendung insbesondere eines Konturschweißprozesses keinerlei Abschmelzweg zu. Dies liegt daran, dass bei dieser Verfahrensvariante der Laserstrahl verhältnismäßig langsam entlang der Schweißkontur geführt wird. Hierbei ist ständig nur ein sehr kleiner Bereich der Naht aufgeschmolzen, die umliegenden, unplastifizierten Bereiche verhindern ein Setzen des transparenten, oberen Bauteils gegenüber dem unteren. Another problem area is the necessary constant distribution of the clamping force along the weld during laser welding of plastics. If the manufacturing tolerances of the component holder on the one hand and the machined, for example, injection-molded components on the other hand taken into account, it is difficult to ensure a constant distribution of clamping force. In addition, the "rigid" clamping technique described in the prior art does not permit any melting path when using a contour welding process.The reason for this is that in this variant of the method the laser beam is guided relatively slowly along the welding contour, whereby only a very small area of the seam is constantly used melted, the surrounding, unplasticized areas prevent setting of the transparent, upper member relative to the lower.
Zum aktuellen Stand der Spanntechnik sind schließlich noch lokale Spanntechniken zu erwähnen, die die zu verschweißenden Bauteile an der Stelle der aktuellen Verschweißung punktuell zusammenpressen. Dies kann beispielsweise mit Hilfe einer Spannrolle oder einer zugleich als optisches Element benutzten Glaskugel erfolgen. To the current state of the clamping technology are finally still local clamping techniques to mention, which selectively compress the components to be welded at the point of the current welding. This can be done, for example, by means of a tensioning roller or a glass ball used at the same time as an optical element.
Diese punktuellen Spanntechniken weisen ebenfalls den Nachteil auf, dass sie zu Beschädigungen der Bauteiloberiläche führen können. Des Weiteren führt der Umstand, dass diese Spanntechniken fest am Schweißkopf ver- baut sind und bis auf das Bauteil hinunter ragen, dazu, dass eine Vielzahl von Bauteilgeometrien gar nicht bearbeitbar sind, da es zu einer Kollision zwischen Spanntechnikkomponenten und Bauteil kommen würde. Ausgehend von den geschilderten Problemen des Standes der Technik liegt der Erfindung die Aufgabe zugrunde, eine strahlgestützte Fügemaschine hinsichtlich ihrer Spannvorrichtung zum Spannen der Bauteile so zu verbessern, dass eine hohe Spannkraft auch bei einer Fügenaht mit komplexem Verlauf in wirkungsvoller und flexibler Weise auf die Bauteile aufgebracht werden kann. These selective clamping techniques also have the disadvantage that they can lead to damage to the component Oberiläche. Furthermore, the fact that these clamping techniques are fixed on the welding head are build and down to the component protrude, to the fact that a variety of component geometries are not editable, as it would lead to a collision between clamping components and component. Based on the described problems of the prior art, the present invention seeks to improve a beam-assisted joining machine with respect to their clamping device for clamping the components so that a high clamping force applied even with a joint seam with a complex course in an effective and flexible manner on the components can be.
Diese Aufgabe wird konzeptionell durch die im Kennzeichnungsteil des Anspruches 1 angegebenen Merkmale gelöst. Demnach ist das Spannmittel durch einen die beiden Bauteile beaufschlagenden, flexiblen Spann- schlauch gebildet, der mit seinem Querschnitt zwischen dem Spannrahmen und den Bauteilen angeordnet ist. Die Spannkraft auf die Bauteile wird durch eine Beaufschlagung des Schlauchvolumens mit einem Druckfluid erzeugt. Die Funktion der Bauteilspannung wird also durch eine flexible Komponente in Form des Spannschlauches übernommen, der eine sehr gleichmäßige Verteilung der Spannkraft über die Bauteile hinweg gewährleistet. Auch werden durch diese Schlauchtechnik die Bauteile in besonderem Maße geschont, da die Spannkraft über die gesamte Spannzone durch ein fle- xibles Element aufgebracht wird. Aufgrund der Flexibilität dieses Spannmittels müssen auch keine exakt an die Formgebung der zu spannenden Bauteile angepassten Klemmmittel bereitgestellt werden. Es genügt, wenn der Spannschlauch an einem grob der Form der zu spannenden Bauteile folgenden Spannrahmen angebracht ist. Letzterer kann im Übrigen auch als für den Fügestrahl transparenter Deckel ausgebildet sein. This object is achieved conceptually by the features stated in the characterizing part of claim 1. Accordingly, the tensioning means is formed by a flexible tensioning hose which acts on the two components and is arranged with its cross section between the tensioning frame and the components. The clamping force on the components is generated by applying a pressure fluid to the tube volume. The function of the component voltage is thus taken over by a flexible component in the form of the clamping tube, which ensures a very uniform distribution of the clamping force across the components. This hose technology also protects the components to a particular degree, because the clamping force is applied over the entire clamping zone by means of a flexible element. Due to the flexibility of this clamping means and no exactly adapted to the shape of the components to be clamped clamping means must be provided. It is sufficient if the tension hose to a roughly the shape of the components to be clamped following tenter is attached. Incidentally, the latter can also be designed as a transparent lid for the joining beam.
Die Flexibilität des Spannschlauches bringt auch den Vorteil mit sich, dass Setzwege der Bauteile während des Fügens ungehindert vonstatten gehen können. Somit können auch Bauteiltoleranzen besser ausgeglichen werden. The flexibility of the tension hose also brings with it the advantage that setting paths of the components can proceed unhindered during the joining. Thus, also component tolerances can be better compensated.
Bevorzugte Weiterbildungen des Erfindungsgegenstandes sind in den abhängigen Ansprüchen angegeben. So ist eine besonders wirkungsvolle Spannung der Bauteile gewährleistet, wenn der Spannschlauch entlang dem Spannrahmen verläuft und die beiden Bauteile in ihrem umlaufenden Randbereich - also entlang der Fügezone - mit der Spannkraft beaufschlagt. Der Aufbringungsort der Spannkraft auf die Bauteile und die Wirkungszone der Spannkraft liegen damit optimal nah beieinander. Preferred developments of the subject invention are specified in the dependent claims. Thus, a particularly effective tension of the components is ensured when the tension hose runs along the clamping frame and the two components in its peripheral edge region - ie applied along the joining zone - with the clamping force. The application of the clamping force on the components and the effective zone of the clamping force are thus optimally close to each other.
Um ein Fügen der Bauteile auch in dem von dem Spannschlauch überdeckten Bereich der Bauteile möglich zu machen, besteht der Spannschlauch aus einem für den Fügestrahl transmissiven Material. Als Druckfluid ist Druckluft von Vorteil, da diese ebenfalls für den Fügestrahl hochtransmissiv ist und als Arbeitsmedium in der Regel an Produktionsorten verfügbar ist. In order to make it possible to join the components even in the region of the components covered by the tensioning tube, the tensioning tube consists of a material transmissive to the joining beam. Compressed air as compressed air is an advantage since it is also highly transmissive to the joining jet and is usually available as a working medium at production sites.
Bevorzugtermaßen besteht der Spannschlauch aus einem elastischen Mate- rial, so dass gleichbleibende Spanneigenschaften auch über eine längere Betriebsdauer der Fügenmaschine gewährleistet ist. Eine hohe Elastizität bei gleichzeitiger Widerstandskraft gegenüber höheren Prozesstemperaturen ist für das Schlauchmaterial von Vorteil. Erfüllt werden diese Eigenschaften beispielsweise durch PTFE- oder ETFE- Schläuche. Weitere bevorzugte Ausführungsformen betreffen die Umsetzung der Spannschlauch-Konzeption in eine Innen-, Außen- oder kombinierte Spanntechnik. So kann der Spannschlauch außen an einem innerhalb der Fügenahtkontur der Bauteile angeordneten Spanrahmen positioniert sein, eine lagenbezogen umgekehrte Positionierung ist ebenfalls möglich. Als Kombination beider Varianten können kombinierte Innen- und Außenrahmen verwendet werden, die beispielsweise über die oben zum Stand der Technik erwähnte DCD- Spanntechnik miteinander verbunden sind. The tension hose is preferably made of an elastic material, so that uniform tensioning properties are ensured even over a longer service life of the joining machine. A high elasticity with simultaneous resistance to higher process temperatures is beneficial for the tubing. These properties are fulfilled, for example, by PTFE or ETFE hoses. Further preferred embodiments relate to the implementation of the tension hose conception in an internal, external or combined clamping technology. Thus, the tensioning hose can be positioned on the outside at a clamping frame arranged within the joining seam contour of the components, a position-related reverse positioning is likewise possible. As a combination of both variants combined inner and outer frames can be used, which are interconnected, for example, via the above-mentioned to the prior art DCD clamping technology.
Weitere alternative Ausbildungen des Erfindungsgegenstandes betreffen die Ausbildung des Spannschlauches selbst als entweder geschlossener Ringschlauch oder als endseitig offener Schlauch. Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels anhand der beigefügten Zeichnungen. Es zeigen: einen Schnitt durch eine Spannvorrichtung mit schematisch dargestelltem Strahlkopf, Further alternative embodiments of the subject invention relate to the formation of the tensioning tube itself as either closed ring tube or as end open hose. Further features, details and advantages of the invention will become apparent from the following description of an embodiment with reference to the accompanying drawings. 1 shows a section through a tensioning device with a schematically illustrated jet head,
Fig. 2 eine perspektivische Ansicht der Spannvorrichtung in geschlossenem Zustand, und Fig. 3 einen schematischen Schnitt der Spannvorrichtung gemäß der Fig. 2 is a perspective view of the clamping device in the closed state, and Fig. 3 is a schematic sectional view of the clamping device according to the
Schnittlinie III- III nach Fig. 1.  Section line III-III of FIG. 1.
Wie aus Fig. 1 deutlich wird, weist die gezeigte, als Beispiel für strahlgestützte Fügemaschine herangezogene Laser-Durchstrahl- schweißeinrichtung einen Strahlkopf 1 auf, zu dem von einer nicht näher dargestellten Laserquelle ein für das übliche Durchstrahlschweißen geeigneter Laserstrahl L herangeführt wird. Der Strahlkopf 1 ist - wie ebenfalls nicht näher dargestellt ist - durch eine entsprechende Mehrachsen- Handhabungsvorrichtung entsprechend der dreidimensionalen Kontur der herzustellenden Schweißnaht 5 (siehe Fig. 3) zwischen den beiden in der Spannvorrichtung 2 gehaltenen Bauteilen 3, 4 eines als Hohlkörper ausgebildeten Produkts geführt. Bei diesem Produkt kann es sich beispielsweise um eine Rückleuchteneinheit eines Kraftfahrzeuges handeln, wobei das erste Bauteil 3 durch das rückseitige Gehäuse der Leuchte gebildet ist. Dieses Gehäuse besteht aus einem laserabsorbierenden Material, wogegen die lasertransmissive und lichtdurchlässige Abdeckung der Leuchte das zweite Bauteil 4 bildet. Die beiden Bauteile 3, 4 werden zum Verschweißen in der Spannvorrichtung 2 mit einer entsprechenden Spannkraft F beaufschlagt, um eine einwandfreie, durchgehende Fügenaht in Form einer Schweißnaht 5 (siehe Fig. 3) zwischen den beiden Bauteilen zu erzeugen. Das untere, gehäuseartige Bauteil 3 wird dabei in eine Aufnahme 6 der Spannvorrichtung 2 in einer definierten Position eingelegt. Dazu weist die Aufnahme 6 eine dem Bauteil 3 in der Form angepasste Aufnahmeöffnung 7 auf, deren Boden 8 als Auflagefläche für das Bauteil 3 dient. Als eigentliche Spannvorrichtung fungiert ein entlang der Kontur derAs is clear from FIG. 1, the laser transmission beam shown as an example for a beam-supported joining machine has Welding device on a jet head 1, to which a laser beam, not shown, a laser beam L suitable for conventional transmission welding is brought to. The jet head 1 is - as also not shown in detail - performed by a corresponding multi-axis handling device according to the three-dimensional contour of the weld 5 to be produced (see Fig. 3) between the two held in the clamping device 2 components 3, 4 of a product designed as a hollow body , This product may be, for example, a tail lamp unit of a motor vehicle, wherein the first component 3 is formed by the rear housing of the lamp. This housing consists of a laser-absorbing material, whereas the laser-transmissive and translucent cover of the luminaire forms the second component 4. The two components 3, 4 are acted upon for welding in the clamping device 2 with a corresponding clamping force F in order to produce a perfect, continuous joint seam in the form of a weld 5 (see FIG. 3) between the two components. The lower, housing-like component 3 is thereby inserted into a receptacle 6 of the clamping device 2 in a defined position. For this purpose, the receptacle 6 a the component 3 in the form adapted receiving opening 7, the bottom 8 serves as a support surface for the component 3. As the actual tensioning device, a function along the contour of the
Schweißnaht 5 umlaufender Spannschlauch 9 aus einem sehr elastischen, für den Laserstrahl L hochtransmissiven PTFE-Material, der an einem Rahmendeckel 12 angebracht ist. Dazu ist der Spannschlauch 9 in einer als Hohlkehle ausgebildeten Montagefläche 10 an den entsprechenden, den Rahmendeckel 12 bildenden Rahmenstreben 13 mit Hilfe eines geeigneten Klebstoffes befestigt. Weld 5 circumferential clamping hose 9 made of a very elastic, for the laser beam L highly permeable PTFE material which is attached to a frame cover 12. For this purpose, the tensioning tube 9 in a trained as a groove mounting surface 10 to the corresponding, the Frame cover 12 forming frame struts 13 secured by means of a suitable adhesive.
Wie insbesondere aus Fig. 3 deutlich wird, erstreckt sich der Spann- schlauch mit seinem Querschnitt zwischen dem als Ganzes mit 1 1 bezeichneten, durch den Rahmendeckel 12 gebildeten Spannrahmen und den Bauteilen 3, 4. As becomes clear in particular from FIG. 3, the tensioning hose extends with its cross section between the clamping frame designated as a whole by 1 1 and the components 3, 4 formed by the frame cover 12.
Der als umlaufender Ringschlauch ausgebildete Spannschlauch 9 ist - wie in Fig. 3 angedeutet ist - mit einem Anschluss 15 für eine Druckluftleitung 16 versehen, die - wie in Fig. 1 schematisch angedeutet ist - mit einer geeigneten Druckluftquelle 17 verbunden ist. Durch die Beaufschlagung des Schlauchlumens SL mit Druckluft wird nun die Spannkraft F auf die Bauteile 3, 4 aufgebracht. The clamping hose 9 designed as a circumferential annular hose is-as indicated in FIG. 3-provided with a connection 15 for a compressed-air line 16, which-as is indicated schematically in FIG. 1-is connected to a suitable compressed-air source 17. By applying the hose lumen SL with compressed air, the clamping force F is now applied to the components 3, 4.
Der Rahmendeckel 12 selbst ist an einer Schmalseite über angeformte Lagerflansche 18 an einem Lagerbock 19 an der Aufnahme 6 mit Hilfe des Lagerbolzens 20 schwenkbar angelenkt. Der Lagerbolzen 20 ist beidseitig mit nicht näher dargestellten Sicherungsringen in seiner in Fig. 2 gezeigten Montageposition gesichert. Der Lagerbock 19 ist mit der Aufnahme 6 vierfach verschraubt. The frame cover 12 itself is hinged on a narrow side via integrally formed bearing flanges 18 on a bearing block 19 on the receptacle 6 by means of the bearing pin 20 pivotally. The bearing pin 20 is secured on both sides with locking rings, not shown in its mounting position shown in Fig. 2. The bearing block 19 is bolted four times with the receptacle 6.
Zur Fixierung des Rahmendeckels 12 in der in Fig. 2 gezeigten geschlossenen Stellung ist ein Schnellspann- Verschluss 21 mit einem Betätigungs- griff 22, einem daran schwenkbar gelagerten Haltebügel 23 und einem Haken 24 am Rahmendeckel 12 vorgesehen. Der Schnellspann- Verschluss 21 basiert in seiner Funktion auf einer üblichen Übertotpunkt-Kinematik. Nach dem Einsetzen der Bauteile 3, 4 und dem Schließen des vorstehend beschriebenen Rahmendeckels werden die Bauteile 3, 4 durch Drackluft- beauschlagung des Schlauchlumens SL verspannt. Damit kann der For fixing the frame cover 12 in the closed position shown in FIG. 2, a quick-release closure 21 is provided with an actuating handle 22, a retaining clip 23 pivotally mounted thereto and a hook 24 on the frame cover 12. The quick-release shutter 21 is based in its function on a conventional over-center kinematic. After insertion of the components 3, 4 and the closing of the frame cover described above, the components 3, 4 are braced by Drackluft- beauschlagung the hose lumen SL. This can be the
Schweißprozess beginnen, wobei der Laserstrahl L sowohl den Spann- schlauch 9 als auch das transparente obere Bauteil 4 durchdringt. Er wird in üblicher Weise vom unteren Bauteil 3 absorbiert, wodurch ein Aufschmelzen mit entsprechendem Wärmeübertrag zum oberen Bauteil 4 mit einer entsprechenden stoffschlüssigen Verbindung zur Bildung der Schweißnaht 5 erfolgt. Nach Beendigung des Schweißprozesses wird der Spannschlauch belüftet und damit die Spannkraft F weggenommen, der Rahmendeckel 12 kann geöffnet und das so fertig geschweißte Produkt aus der Spannvorrichtung 2 entnommen werden. Start welding process, wherein the laser beam L penetrates both the tension hose 9 and the transparent upper component 4. It is absorbed in the usual way by the lower component 3, whereby a melting takes place with a corresponding heat transfer to the upper component 4 with a corresponding cohesive connection to form the weld 5. After completion of the welding process, the tension hose is vented and thus removed the clamping force F, the frame cover 12 can be opened and the thus finished welded product can be removed from the jig 2.

Claims

Patentansprüche claims
1. Strahlgestützte Fügemaschine, insbesondere Laser-Durchstrahl- Schweißeinrichtung, umfassend 1. Beam-supported joining machine, in particular laser Durchstrahl- welding device comprising
- einen Strahlkopf (1) zur Bereitstellung eines eine Fügenaht (5) zwischen zwei Bauteilen (3, 4) erzeugenden Fügestrahls (L),  a jet head (1) for providing a joining jet (L) which generates a joining seam (5) between two components (3, 4),
- eine Aufnahme (6) zur Lagerung des ersten Bauteils (3), und - A receptacle (6) for mounting the first component (3), and
- eine Spannvorrichtung (2) zum Spannen der Bauteile (3, 4), insbesondere zum Spannen von Bauteilen (3, 4) mit einer dreidimensional verlaufenden Fügenaht (5), welche Spannvorrichtung (2) einen mit der Aufnahme (6) kooperierenden Spannrahmen (1 1) und ein Spannmittel zum Erzeugen einer Spannkraft (F) zwischen den beiden Bauteilen (3, 4) zumindest im Bereich der jeweils vom Fügestrahl (L) beaufschlagten Fügezone aufweist, - A clamping device (2) for clamping the components (3, 4), in particular for clamping of components (3, 4) with a three-dimensionally extending joint seam (5), which clamping device (2) cooperating with the receptacle (6) clamping frame ( 1 1) and a clamping means for generating a clamping force (F) between the two components (3, 4) at least in the region of each of the joining beam (L) acted upon joining zone,
dadurch gekennzeichnet, dass  characterized in that
- das Spannmittel durch einen die beiden Bauteile (3, 4) beaufschlagenden, flexiblen Spannschlauch (9) gebildet ist, der mit seinem Querschnitt zwischen dem Spannrahmen (1 1) und den Bauteilen (3, 4) angeordnet und dessen Spannkraft (F) durch Beaufschlagung des Schlauchlumens (SL) mit einem Druckfluid erzeugt ist.  - The clamping means by one of the two components (3, 4) acted upon, flexible clamping hose (9) is formed, which arranged with its cross section between the clamping frame (1 1) and the components (3, 4) and its clamping force (F) Actuation of the tube lumen (SL) is generated with a pressurized fluid.
2. Fügemaschine nach Anspruch 1, dadurch gekennzeichnet, dass der2. Joining machine according to claim 1, characterized in that the
Spannschlauch (9) entlang dem Spannrahmen (1 1) verläuft und die beiden Bauteile (3, 4) in ihrem umlaufenden Randbereich mit der Spannkraft beaufschlagt. Clamping hose (9) along the clamping frame (1 1) extends and the two components (3, 4) acted on in its peripheral edge region with the clamping force.
3. Fügemaschine nach Anspruch 2, dadurch gekennzeichnet, dass der3. Joining machine according to claim 2, characterized in that the
Spannschlauch (9) aus einem für den Fügestrahl (L) transmissiven Ma- terial besteht. Tensioning tube (9) made of a material that is transmissive to the joining beam (L) material exists.
4. Fügemaschine nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, dass das Druckfluid Druckluft ist. 4. Joining machine according to one of the preceding claims, characterized in that the pressurized fluid is compressed air.
5. Fügemaschine nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, dass der Spannschlauch (9) aus einem elastischen Material besteht. 5. Joining machine according to one of the preceding claims, characterized in that the clamping hose (9) consists of an elastic material.
6. Fügemaschine nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, dass der Spannschlauch (9) außen an einem innerhalb der Kontur der Fügenaht (5) der Bauteile (3, 4) angeordneten Spannrahmen positioniert ist. 6. Joining machine according to one of the preceding claims, characterized in that the clamping hose (9) is positioned on the outside of a within the contour of the joining seam (5) of the components (3, 4) arranged clamping frame.
7. Fügemaschine nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, dass der Spannschlauch (9) innen an einem außerhalb der Kontur der Fügenaht (5) der Bauteile (3, 4) angeordneten Spannrahmen (1 1) positioniert ist. 7. Joining machine according to one of the preceding claims, characterized in that the clamping hose (9) is positioned on the inside of a outside of the contour of the joining seam (5) of the components (3, 4) arranged clamping frame (1 1).
8. Fügemaschine nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, dass der Spannschlauch (9) in den Spannrahmen (1 1) eingeklebt ist. 8. Joining machine according to one of the preceding claims, characterized in that the clamping hose (9) in the clamping frame (1 1) is glued.
9. Fügemaschine nach einem der vorgenannten Ansprüche, dadurch ge- kennzeichnet, dass der Spannschlauch (9) als geschlossener Ringschlauch mit einem Anschluss (15) zur Befüllung mit dem Druckfluid ausgebildet ist. 9. Joining machine according to one of the preceding claims, character- ized in that the clamping tube (9) is designed as a closed annular tube with a connection (15) for filling with the pressurized fluid.
10. Fügemaschine nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der Spannschlauch als endseitig offener Schlauch ausgebildet ist, wobei das Druckfluid über mindestens eines der offenen Enden einspeisbar ist. 10. Joining machine according to one of claims 1 to 8, characterized in that the tensioning hose is designed as an open end hose, wherein the pressurized fluid can be fed via at least one of the open ends.
PCT/EP2014/068513 2013-09-04 2014-09-01 Beam-assisted joining machine, in particular laser transmission welding device having a clamping means formed by a flexible clamping hose WO2015032719A1 (en)

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DE102013217647.3A DE102013217647A1 (en) 2013-09-04 2013-09-04 Beam-supported joining machine, in particular laser penetrating welding device

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