DE10243005A1 - Laser welding and marking for workpiece containing two thermoplastics uses single process with different wavelengths for welding and for marking - Google Patents
Laser welding and marking for workpiece containing two thermoplastics uses single process with different wavelengths for welding and for marking Download PDFInfo
- Publication number
- DE10243005A1 DE10243005A1 DE2002143005 DE10243005A DE10243005A1 DE 10243005 A1 DE10243005 A1 DE 10243005A1 DE 2002143005 DE2002143005 DE 2002143005 DE 10243005 A DE10243005 A DE 10243005A DE 10243005 A1 DE10243005 A1 DE 10243005A1
- Authority
- DE
- Germany
- Prior art keywords
- laser beam
- wavelength
- welding
- marking
- laser
- 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
Links
Classifications
-
- 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
- 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
- B23K26/18—Working by laser beam, e.g. welding, cutting or boring using absorbing layers on the workpiece, e.g. for marking or protecting purposes
-
- 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
- B23K26/244—Overlap seam 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
- B29C65/02—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
- B29C65/02—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
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/306—Applying a mark during joining
-
- 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
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
-
- 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
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
- B29C66/472—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially 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
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
- B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
-
- 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
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
-
- 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
- B29C66/90—Measuring or controlling the joining process
- B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
- B29C66/952—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the wavelength
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/267—Marking of plastic artifacts, e.g. with laser
-
- 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
- B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
- B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
- B29C65/1616—Near infrared radiation [NIR], e.g. by YAG lasers
-
- 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
- B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
- B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
- B29C65/1619—Mid infrared radiation [MIR], e.g. by CO or CO2 lasers
-
- 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
- B29C65/1661—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined scanning repeatedly, e.g. quasi-simultaneous laser 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
- B29C65/02—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
- B29C65/1664—Laser beams characterised by the way of heating the interface making use of several radiators
- B29C65/1667—Laser beams characterised by the way of heating the interface making use of several radiators at the same time, i.e. simultaneous laser 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
- B29C65/02—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
- B29C65/1674—Laser beams characterised by the way of heating the interface making use of laser diodes
-
- 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
- B29C65/1677—Laser beams making use of an absorber or impact modifier
-
- 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
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
-
- 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
- B29K2101/00—Use of unspecified macromolecular compounds as moulding material
- B29K2101/12—Thermoplastic materials
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- Toxicology (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Laser Beam Processing (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft ein Verfahren zum Schweißen von thermoplastischen Materialien mittels Laserstrahlen nach dem Oberbegriff von Anspruch 1, eine Vorrichtung zur Durchführung dieses Verfahrens nach dem Oberbegriff des Anspruchs 9 sowie ein geeignetes Werkstückteil nach dem Oberbegriff des Anspruchs 15.The present invention relates to a method of welding of thermoplastic materials using laser beams after The preamble of claim 1, an apparatus for performing this Method according to the preamble of claim 9 and a suitable one Workpiece part according to the preamble of claim 15.
Ein Verfahren zum Verschweißen zweier thermoplastischer
Werkstücke
mittels Laserstrahlen ist unter der Bezeichnung Laserdurchstrahlschweißen bekannt.
Das Prinzip des Laserdurchstrahlstrahlschweißens ist in
Typischerweise werden bei diesem Verfahren Nd:YAG-Laser mit einer Wellenlänge von 1064 nm eingesetzt, da bei dieser Wellenlänge die meisten Kunststoffe transparent und somit prinzipiell zur Verwendung als erstes Kunststoffmaterial geeignet sind.Typically, this one Method Nd: YAG laser with a wavelength of 1064 nm used, there at this wavelength most plastics are transparent and therefore principally for use are suitable as the first plastic material.
Beim Bestrahlen der aneinandergrenzenden Kunststoffe
mit dem Laserstrahl
Aufgrund der unterschiedlichen Absorptionseigenschaften
der durch das bekannte Laserdurchstrahlschweißverfahren verbindbaren Werkstückteile entsteht
ein fertiges Werkstück
mit sichtbar unterschiedlich gefärbten
Teilen. Bei vielen Anwendungsbereichen, wie beispielsweise für die Herstellung
von Schaltergehäusen,
ist jedoch ein optisch einheitlicher Gesamteindruck des zusammengeschweißten Werkstücks erwünscht. Zu
diesem Zweck ist aus der
Für
andere Anwendungsbereiche kann es erwünscht sein, ein schwarz gefärbtes erstes
Werkstückteil
zu verwenden. Gemäß dem aus
der
Im Anschluß an das Laserdurchstrahlverschweißen ist oftmals eine Beschriftung solcher verschweißter Kunststoffe erwünscht. Die Beschriftung erfolgt in einem anschließenden Bearbeitungsschritt mit einem Beschriftungslaser.Following the laser transmission welding labeling of such welded plastics is often desired. The Labeling takes place in a subsequent processing step a marking laser.
Eine Beschriftung von Kunststoffen kann beispielsweise mittels eines CO2-Lasers erfolgen. Der CO2-Laser emittiert Strahlung mit einer Wellenlänge von ca. 10 μm, bei der alle Kunststoffe absorbieren. Bei Verwendung eines CO2-Lasers zum Beschriften wird das Kunststoffmaterial jedoch graviert. Dies ist mit dem Nachteil verbunden, daß die durch Gravieren erreichbare Kontrast gering ist und sich beispielsweise nicht zum Beschriften mit einem Barcode eignet.Plastics can be labeled, for example, using a CO 2 laser. The CO 2 laser emits radiation with a wavelength of approx. 10 μm, at which all plastics absorb. If a CO 2 laser is used for marking, however, the plastic material is engraved. This has the disadvantage that the contrast that can be achieved by engraving is low and is, for example, not suitable for labeling with a bar code.
Ist eine Beschriftung mit hohem Kontrast erwünscht, werden üblicherweise Nd:YAG-Laser eingesetzt. Der Nd:YAG-Laser mit einer Wellenlänge von 1064 nm eignet sich jedoch nicht zur Beschriftung transparenter Kunststoffe. Aufgrund dieser Tatsache wurden bisher das Laserdurchstrahlschweißen und das Beschriften des geschweißten Werkstücks stets als getrennte Verfahren in zwei verschiedenen Stationen durchgeführt.Is a label with high contrast he wishes, are common Nd: YAG laser used. The Nd: YAG laser with a wavelength of However, 1064 nm is not suitable for labeling more transparent Plastics. Due to this fact, laser transmission welding and the labeling of the welded workpiece always carried out as separate processes in two different stations.
Es soll demnach ein Verfahren, eine Vorrichtung sowie ein geeignetes Werkstückteil geschaffen werden, mit dem das Laserdurchstrahlschweißen und das Beschriften in einer einzigen Vorrichtung durchgeführt werden können.It should therefore be a procedure, a Device and a suitable workpiece part are created with which the laser transmission welding and the labeling can be carried out in a single device can.
Vorteile der ErfindungAdvantages of invention
Erfindungsgemäß wird somit bei einem bekannten Laserdurchstrahlschweißverfahren zum Verschweißen eines aus mindestens zwei thermoplastischen Werkstückteilen bestehenden Werkstücks mittels eines Laserstrahls einer Schweißwellenlänge die Wellenlänge des Laserstrahls von der Schweißwellenlänge in eine Markierwellenlänge geändert, bei der das erste thermoplastische Werkstückteil den Laserstrahl überwiegend absorbiert. Bei der Markierwellenlänge wird das erste thermoplastische Werkstückteil mit dem Laserstrahl markiert.According to the invention, a known laser transmission welding method is used to weld a workpiece consisting of at least two thermoplastic workpiece parts By means of a laser beam of a welding wavelength, the wavelength of the laser beam is changed from the welding wavelength to a marking wavelength at which the first thermoplastic workpiece part predominantly absorbs the laser beam. At the marking wavelength, the first thermoplastic workpiece part is marked with the laser beam.
Durch Ändern der Wellenlänge des Laserstrahls von einer Schweißwellenlänge in eine Markierwellenlänge wird somit eine Zeitersparnis bei der Durchführung des Schweiß- und Markierverfahrens erzielt, da das Verfahren in einer einzigen Vorrichtung mit einer einzigen Laserstrahlenquelle durchgeführt werden kann und somit der Schritt entfällt, die zu bearbeitenden Werkstücke von einer Schweißanlage in eine Markieranlage zu transportieren. Eine solche kombinierte Anlage kann in einer kompakten Bauweise mit nur einer einzigen Laserstrahlenquelle und einem Mittel zum reversiblen Ändern der Wellenlänge des Laserstrahls verwirklicht werden, so daß gegenüber herkömmlichen getrennten Vorrichtungen Kostenersparnisse erzielt werden können.By changing the wavelength of the Laser beam from a welding wavelength into a Markierwellenlänge this saves time when performing the welding and marking process, since the process in a single device with a single Laser beam source can be performed can and thus the step is omitted, the workpieces to be machined from a welding machine to be transported to a marking system. Such a combined System can be built in a compact design with only a single laser beam source and means for reversibly changing the wavelength of the Laser beam can be realized, so that compared to conventional separate devices Cost savings can be achieved.
Es ist im Rahmen der Erfindung unerheblich, ob bei der Durchführung des erfindungsgemäßen Verfahrens das Markieren des ersten thermoplastischen Werkstückteils vor oder nach dem Verschweißen der thermoplastischen Werkstückteile erfolgt.It is irrelevant within the scope of the invention whether during execution of the method according to the invention marking the first thermoplastic workpiece part before or after welding of the thermoplastic workpiece parts he follows.
In vorteilhafter Ausgestaltung der Erfindung wird ein erstes Werkstückteil verwendet, das zumindest teilweise mit einem Farbstoff gefärbt ist, der Laserstrahlen im Bereich sichtbarer Wellenlängen absorbiert und Laserstrahlen im Infrarotbereich durchläßt. Bei Verwendung derartiger Farbstoffe lassen sich Werkstücke mit verschiedenartiger farblicher Gestaltung der Werkstückteile entsprechend den aktuellen Markterfordernissen unter Verwendung üblicher Schweiß- und Markierlaser, z.B. Nd:YAG-Laser, erfindungsgemäß verschweißen und markieren.In an advantageous embodiment of the Invention becomes a first workpiece part used that is at least partially colored with a dye, the laser beams are absorbed in the visible wavelength range and laser beams transmits in the infrared range. at Workpieces can be used with such dyes different color design of the workpiece parts according to current market requirements using more common welding and marking lasers, e.g. Nd: YAG laser, weld according to the invention and to mark.
In besonders vorteilhafter Ausgestaltung der Erfindung beträgt die Schweißwellenlänge des Laserstrahls das Doppelte oder das Dreifache der Markierwellenlänge, so daß das Verfahren unter Verwendung üblicher Frequenzverdoppler oder Frequenzverdreifacher durchgeführt werden kann, die in die Strahlenquelle ein- und ausfahrbar sind. Beispielsweise eignet sich für die Durchführung des erfindungsgemäßen Verfahrens ein Nd:YAG-Laser mit einer Schweißwellenlänge von 1064 nm, der üblicherweise für die Durchführung eines Laserdurchstrahlschweißverfahrens zum Verschweißen eines bei 1064 nm weitgehend transparenten ersten thermoplastischen Werkstückteils mit einem bei 1064 nm weitgehend absorbierenden zweiten thermoplastischen Werkstückteil verwendet wird. Nach Durchführung des Laserdurchstrahlschweißens wird zur Durchführung des Markierungsvorgangs die Wellenlänge des Nd:YAG-Laserstrahls mittels eines in die Laserstrahlenquelle einschwenkbaren Frequenzverdopplers in eine Markierwellenlänge von 532 nm geändert.In a particularly advantageous embodiment of the invention the welding wavelength of the Laser beam twice or three times the marking wavelength, see above that this Methods using common Frequency doubler or frequency tripler can be performed can, which are retractable and extendable into the radiation source. For example, is suitable for the implementation of the method according to the invention an Nd: YAG laser with a welding wavelength of 1064 nm, which is usually for the execution a laser transmission welding process for welding a first thermoplastic largely transparent at 1064 nm Workpiece part with a second thermoplastic largely absorbing at 1064 nm Workpiece part is used. After implementation of laser transmission welding becomes the implementation of the marking process the wavelength of the Nd: YAG laser beam by means of a frequency doubler that can be swiveled into the laser beam source into a marking wavelength changed from 532 nm.
Alternativ sind auch andere dem Fachmann bekannte Laser zur Durchführung des Verfahrens geeignet, beispielsweise Diodenlaser.Alternatively, others known to those skilled in the art are also available Laser to carry out suitable for the method, for example diode lasers.
Das für die Durchführung des erfindungsgemäßen Verfahrens geeignete thermoplastische Werkstückteil weist demnach erfindungsgemäß zumindest im Bereich der vorgesehenen Markierung einen Farbstoff auf, der für eine Schweißwellenlänge des Laserstrahls weitgehend transparent ist und eine Markierwellenlänge des Laserstrahls weitgehend absorbiert.That for the implementation of the inventive method suitable thermoplastic workpiece part accordingly at least according to the invention in the area of the intended marking on a dye that for one Welding wavelength of the Laser beam is largely transparent and a marking wavelength of Laser beam largely absorbed.
Insbesondere sind Farbstoffe geeignet, die Laserstrahlen im Bereich der sichtbaren Wellenlängen weitgehend absorbieren und für Laserstrahlen im infraroten Bereich weitgehend transparent sind. Dadurch wird die Verwendung eines üblichen Nd:YAG-Lasers mit einer Schweißwellenlänge von 1064 nm für die Durchführung des erfindungsgemäßen Verfahrens ermöglicht.Dyes are particularly suitable the laser beams largely in the visible wavelength range absorb and for Laser beams in the infrared range are largely transparent. Thereby will use a standard Nd: YAG laser with a welding wavelength of 1064 nm for the implementation of the method according to the invention allows.
Weitere Vorteile und Ausgestaltungen ergeben sich aus den jeweiligen Unteransprüche, der Beschreibung und der beiliegenden Zeichnung.Further advantages and configurations result from the respective subclaims, the description and the enclosed drawing.
Es versteht sich, daß die vorstehend benannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It is understood that the above not only named and the features to be explained below in the specified combination, but also in others Combinations or alone can be used without the frame to leave the present invention.
Die Erfindung ist anhand eines Ausführungsbeispiels in der Zeichnung schematisch dargestellt und wird im Folgenden unter Bezugnahme auf die Zeichnung ausführlich beschrieben.The invention is based on an embodiment shown schematically in the drawing and is described below Described in detail with reference to the drawing.
Bevorzugte AusführungsformenPreferred embodiments
Aufgrund des Kontakts der ersten
Fügefläche
Unter weiterer Druckbeaufschlagung
verschmelzen die korrespondierenden Schmelzbereiche
Nach Abschalten des Laserstrahls
In
Der Laserstrahl
Die erfindungsgemäße Vorrichtung weist ferner
eine Optik
Eine erfindungsgemäße Vorrichtung
kann alternativ anstelle des Spiegels
Die in
Es ist ersichtlich, daß dem erfindungsgemäßen Verfahren
die Idee zugrundeliegt, durch geeignete fachmännische Auswahl von thermoplastischen Materialen
mit bestimmten Absorptionseingenschaften für die Verwendung als Werkstückteile
Beispielsweise eignet sich für die Durchführung des
erfindungsgemäßen Verfahrens
ein Nd:YAG-Laser mit einer Schweißwellenlänge von 1064 nm, der üblicherweise
für die
Durchführung
eines Laserdurchstrahlschweißverfahrens
zum Verschweißen
eines bei 1064 nm weitgehend transparenten ersten thermoplastischen
Werkstückteils
mit einem bei 1064 nm weitgehend absorbierenden zweiten thermoplastischen
Werkstückteil
verwendet wird. Das erfindungsgemäße Verfahren kann somit unter
Verwendung eines ersten thermoplastischen Werkstückteils aus einem bei 1064
nm weitgehend transparenten und bei 532 nm weitgehend absorbierenden
Material durchgeführt
werden. Ein solches Material kann beispielsweise ein übliches
thermoplastisches Kunststoffmaterial sein, das zumindest teilweise
mit einem bei 1064 nm transparenten und bei 532 nm absorbierenden
Farbstoff eingefärbt
ist. Das zweite Werkstückteil
ist entsprechend den Anforderungen des Laserdurchstrahlschweißverfahrens aus
einem bei 1064 nm absorbierenden Material ausgebildet, beispielsweise
aus einem mit Rußpartikeln gefärbten herkömmlichen
thermoplastischen Kunststoffmaterial. Nach Ändern der Wellenlänge des Nd:YAG-Laserstrahls
mittels eines in die Laserstrahlenquelle einschwenkbaren Frequenzverdopplers
Claims (16)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002143005 DE10243005A1 (en) | 2002-09-17 | 2002-09-17 | Laser welding and marking for workpiece containing two thermoplastics uses single process with different wavelengths for welding and for marking |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002143005 DE10243005A1 (en) | 2002-09-17 | 2002-09-17 | Laser welding and marking for workpiece containing two thermoplastics uses single process with different wavelengths for welding and for marking |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10243005A1 true DE10243005A1 (en) | 2004-03-25 |
Family
ID=31896061
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2002143005 Ceased DE10243005A1 (en) | 2002-09-17 | 2002-09-17 | Laser welding and marking for workpiece containing two thermoplastics uses single process with different wavelengths for welding and for marking |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE10243005A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006116232A2 (en) * | 2005-04-21 | 2006-11-02 | Laser Energetics, Inc. | Uv-visible-ir multi-wave length laser marking process |
FR2915912A1 (en) * | 2007-05-11 | 2008-11-14 | Peugeot Citroen Automobiles Sa | METHOD FOR LASER WELDING OF METALLIC ELEMENTS |
CN102173218A (en) * | 2010-12-30 | 2011-09-07 | 东莞市创普光电技术有限公司 | New application of laser marking machine |
EP3363578A1 (en) * | 2017-02-17 | 2018-08-22 | Sund Birsta AB | Binding machine and method for securing a part of a binding element in a loop around one or more objects |
EP3418032A1 (en) | 2017-06-24 | 2018-12-26 | Sintratec AG | Method and device for additive manufacturing |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4334751A1 (en) * | 1993-10-12 | 1995-04-13 | Graf & Co Gmbh Walter | Method of inscribing plastic parts of laboratory equipment for their use |
DE19826414A1 (en) * | 1998-06-16 | 1999-12-23 | Coronet Werke Gmbh | Process for connecting, marking and structurally changing monofilaments |
DE10054859A1 (en) * | 2000-11-06 | 2002-05-08 | Basf Ag | Process for joining molded parts |
EP1297944A1 (en) * | 2001-09-29 | 2003-04-02 | Institut für angewandte Biotechnik und Systemanalyse an der Universität Witten/Herdecke GmbH | Process for laser beam welding of plastic parts |
-
2002
- 2002-09-17 DE DE2002143005 patent/DE10243005A1/en not_active Ceased
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4334751A1 (en) * | 1993-10-12 | 1995-04-13 | Graf & Co Gmbh Walter | Method of inscribing plastic parts of laboratory equipment for their use |
DE19826414A1 (en) * | 1998-06-16 | 1999-12-23 | Coronet Werke Gmbh | Process for connecting, marking and structurally changing monofilaments |
DE10054859A1 (en) * | 2000-11-06 | 2002-05-08 | Basf Ag | Process for joining molded parts |
EP1297944A1 (en) * | 2001-09-29 | 2003-04-02 | Institut für angewandte Biotechnik und Systemanalyse an der Universität Witten/Herdecke GmbH | Process for laser beam welding of plastic parts |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006116232A2 (en) * | 2005-04-21 | 2006-11-02 | Laser Energetics, Inc. | Uv-visible-ir multi-wave length laser marking process |
WO2006116232A3 (en) * | 2005-04-21 | 2009-04-23 | Laser Energetics Inc | Uv-visible-ir multi-wave length laser marking process |
FR2915912A1 (en) * | 2007-05-11 | 2008-11-14 | Peugeot Citroen Automobiles Sa | METHOD FOR LASER WELDING OF METALLIC ELEMENTS |
WO2008149008A2 (en) * | 2007-05-11 | 2008-12-11 | Peugeot Citroen Automobiles Sa | Laser welding process for welding metal components, producing a plurality of projections by means of a laser at the interface between the components |
WO2008149008A3 (en) * | 2007-05-11 | 2009-02-19 | Peugeot Citroen Automobiles Sa | Laser welding process for welding metal components, producing a plurality of projections by means of a laser at the interface between the components |
CN102173218A (en) * | 2010-12-30 | 2011-09-07 | 东莞市创普光电技术有限公司 | New application of laser marking machine |
EP3363578A1 (en) * | 2017-02-17 | 2018-08-22 | Sund Birsta AB | Binding machine and method for securing a part of a binding element in a loop around one or more objects |
WO2018149841A1 (en) * | 2017-02-17 | 2018-08-23 | Sund Birsta Ab | Binding machine and method for securing a part of a binding element in a loop around one or more objects |
CN110352112A (en) * | 2017-02-17 | 2019-10-18 | 森德斯有限公司 | For a part for wrapping up element to be surrounded to the bundling machine and method that are fixed on one or more objects with annular |
EP3418032A1 (en) | 2017-06-24 | 2018-12-26 | Sintratec AG | Method and device for additive manufacturing |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69904844T2 (en) | PROCESS FOR WELDING | |
EP0751865B1 (en) | Plastic workpiece and process for producing it | |
DE4326874C3 (en) | Method of engraving a pattern on a surface of a workpiece | |
EP1297944A1 (en) | Process for laser beam welding of plastic parts | |
EP0997261A1 (en) | Laser welding method and apparatus for joining a plurality of plastic articles with each other or with other materials | |
DE102005024076A1 (en) | Production method for vehicle lamp | |
DE2653353A1 (en) | PROCESS AND DEVICE FOR THERMAL WELDING OF TWO FILMS | |
WO2000003865A1 (en) | Method and device for welding thermoplastic synthetic materials using laser light | |
DE19919191A1 (en) | Welding method and apparatus | |
DE2722896A1 (en) | PROCESS FOR THE EDGE JOINING OF LIGHT-CURABLE THERMOPLASTIC ELASTOMER PRINTING PLATES | |
WO2004058485A1 (en) | Method and device for welding thermoplastic material shaped parts, particularly for contour-welding three-dimensional shaped parts | |
DE102005018727A1 (en) | Method and device for welding two workpieces made of thermoplastic materials by means of laser radiation | |
DE112008001167T5 (en) | Infrared plastic welding returning unabsorbed infrared laser light to increase the absorption of infrared laser light | |
DE10037109C2 (en) | Method and device for smoothing welds during beam welding | |
DE102016216844B4 (en) | Process for laser beam plastic welding and device | |
EP3515637A1 (en) | Apparatus for irradiating a work region with laser radiation, in particular 3-d printing apparatus | |
DE10243005A1 (en) | Laser welding and marking for workpiece containing two thermoplastics uses single process with different wavelengths for welding and for marking | |
DE10004538A1 (en) | Laser welding of filled and non-filled plastic components involves transmitting a beam at the welding face between both plastic layers and cooling the upper surface of the beam transmitting layer | |
EP1024919B1 (en) | Method of treating a workpiece or a workpiece assembly in particular for brazing using an electromagnetic beam | |
EP1987944B1 (en) | Transmission laser welding device and process for joining plastic parts | |
EP3419811B1 (en) | Method for welding a connection between a first joining surface of a first molded part and a second joining face of a second molded part | |
DE102006008776B4 (en) | Method for joining at least two joining partners consisting of thermoplastic material by means of laser radiation | |
DE10335446A1 (en) | Laser welding of plastic components involves location of energy absorber film between the two components | |
EP3181331A1 (en) | Method and device for laser welding of three dimensional plastic parts | |
DE102005047511B4 (en) | Method for connecting two plastic parts |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8131 | Rejection |