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DE102008038014A1 - Method for laser transmission beam welding of plastic, comprises generating a transmission profile of a transmissive joining partners along a contour of a welding seam to be generated and guiding a processing radiation with a laser power - Google Patents

Method for laser transmission beam welding of plastic, comprises generating a transmission profile of a transmissive joining partners along a contour of a welding seam to be generated and guiding a processing radiation with a laser power Download PDF

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Publication number
DE102008038014A1
DE102008038014A1 DE102008038014A DE102008038014A DE102008038014A1 DE 102008038014 A1 DE102008038014 A1 DE 102008038014A1 DE 102008038014 A DE102008038014 A DE 102008038014A DE 102008038014 A DE102008038014 A DE 102008038014A DE 102008038014 A1 DE102008038014 A1 DE 102008038014A1
Authority
DE
Germany
Prior art keywords
joining
radiation
transmissive
contour
joining partner
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
DE102008038014A
Other languages
German (de)
Inventor
Frank Brunnecker
René Geiger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LPKF Laser and Electronics AG
Original Assignee
LPKF Laser and 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 and Electronics AG filed Critical LPKF Laser and Electronics AG
Priority to DE102008038014A priority Critical patent/DE102008038014A1/en
Publication of DE102008038014A1 publication Critical patent/DE102008038014A1/en
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/03—Observing, e.g. monitoring, the workpiece
    • 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
    • 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
    • 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
    • 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
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/133—Fin-type joints, the parts to be joined being flexible
    • 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
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2424—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain
    • B29C66/24243—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral
    • B29C66/24244—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral forming a rectangle
    • B29C66/24245—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral forming a rectangle forming a square
    • 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
    • B29C66/347—General aspects dealing with the joint area or with the area to be joined using particular temperature distributions or gradients; using particular heat distributions or gradients
    • B29C66/3472—General aspects dealing with the joint area or with the area to be joined using particular temperature distributions or gradients; using particular heat distributions or gradients in the plane of the joint, e.g. along the joint line in the plane of the joint or perpendicular to the joint line in the plane of the joint
    • 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
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/45—Joining of substantially the whole surface of the 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
    • B29C66/90—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
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91631—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being kept constant over time
    • 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
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91641—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time
    • 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
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B29C66/9192—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams
    • 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
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
    • B29C66/93431—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed the speed being kept constant over time
    • 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
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
    • B29C66/93441—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed the speed being non-constant over time
    • 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
    • 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
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/961—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving a feedback loop mechanism, e.g. comparison with a desired value
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
    • 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
    • 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
    • B29C65/1629—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
    • 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
    • B29C66/737—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 state of the material of the parts to be joined
    • B29C66/7377—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 state of the material of the parts to be joined amorphous, semi-crystalline or crystalline
    • B29C66/73773—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 state of the material of the parts to be joined amorphous, semi-crystalline or crystalline the to-be-joined area of at least one of the parts to be joined being semi-crystalline
    • B29C66/73774—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 state of the material of the parts to be joined amorphous, semi-crystalline or crystalline the to-be-joined area of at least one of the parts to be joined being semi-crystalline the to-be-joined areas of both parts to be joined being semi-crystalline
    • 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
    • B29C66/737—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 state of the material of the parts to be joined
    • B29C66/7377—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 state of the material of the parts to be joined amorphous, semi-crystalline or crystalline
    • B29C66/73775—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 state of the material of the parts to be joined amorphous, semi-crystalline or crystalline the to-be-joined area of at least one of the parts to be joined being crystalline
    • B29C66/73776—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 state of the material of the parts to be joined amorphous, semi-crystalline or crystalline the to-be-joined area of at least one of the parts to be joined being crystalline the to-be-joined areas of both parts to be joined being crystalline

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thermal Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Plasma & Fusion (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Laser Beam Processing (AREA)

Abstract

The method comprises generating a transmission profile of a transmissive joining partner (2) along a contour of a welding seam to be generated, guiding a processing beam with a laser power in a joining zone for joining process with an absorbent joining partner along the contour, and controlling the joining process in such a way that an increased energy entry takes place in the joining zone in an area of the decreased transmission of the transmissive joining partner. The generation of the transmission profile is carried out through measuring a measuring beam (3, 6). The method comprises generating a transmission profile of a transmissive joining partner (2) along a contour of a welding seam to be generated, guiding a processing beam with a laser power in a joining zone for a following joining process with an absorbent joining partner along the contour, and controlling the joining process in such a way that an increased energy entry takes place in the joining zone in an area of the decreased transmission of the transmissive joining partner. The generation of the transmission profile is carried out through measuring a measuring beam (3, 6) transmitted by the transmissive joining partner by a light detector (5). The wave length of the measuring radiation stands in direct relation to the wavelength of the processing beam. The wave length of the measuring beam and the processing beam is same. The increased energy entry is carried out through increasing a laser power of the processing radiation at constant relative speed between the processing radiation and the joining partner, or through reducing the relative speed between the processing beam and the joining partner at constant laser power of the processing beam. The sequence of the process steps is automatically carried out.

Description

Die Erfindung betrifft ein Verfahren für das Laserdurchstrahl-Kunststoffschweißen zur Messung der transmissiven Materialeigenschaften sowie zur Steuerung der Laserleistung in einem nachfolgenden Fügeprozess.The The invention relates to a method for laser transmission plastic welding for the measurement of transmissive material properties as well as for control the laser power in a subsequent joining process.

Das Laserdurchstrahl-Kunststoffschweißen ist aus der DE 44 32 081 A1 bekannt. Dabei dringt Bearbeitungsstrahlung mit nur geringer Dämpfung durch einen transmissiven Fügepartner in eine Fügezone und wird von einem absorbierenden Fügepartner absorbiert, der daraufhin lokal plastifiziert. Infolge von Wärmeleitung in den transmissiven Fügepartner wird auch dieser lokal plastifiziert, so dass ein Stoffschluss zwischen den beiden Fügepartnern erfolgt.The laser transmission plastic welding is from the DE 44 32 081 A1 known. In this case, machining radiation penetrates into a joining zone with only slight damping through a transmissive joining partner and is absorbed by an absorbent joining partner, which then plastifies locally. As a result of heat conduction in the transmissive joining partner, this is also plasticized locally, so that a material connection between the two joining partners takes place.

Mangelhafte Fügeverbindungen können bei dem Laserdurchstrahl-Kunststoffschweißen auf Geometriefehlern der Fügepartner oder auf gegenüber der Prozessauslegung veränderten optischen Eigenschaften der Fügepartner basieren. Durch Geometriefehler kann der thermische Kontakt zwischen den Fügepartnern derart beeinträchtigt werden, dass die resultierende Wärmeleitung nicht ausreicht, um den transmissiven Fügepartner lokal zu plastifizieren. Typische Geometriefehler sind Kerben oder Nahtspalte, wobei die Spalte durch Verzug der Fügepartner entstehen können. Im Gegensatz zu Geometriefehlern, die auch bei konventionellen Fügeverfahren zu mangelhaften Fügeverbindungen führen können, können die optischen Eigenschaften – das sind die Reflexion einer Strahlung an einer Oberfläche sowie die Transmission, die Absorption und die Streuung bei dem Eintreten einer Strahlung in einen Körper – der Fügepartner eine spezifische Fehlerursache für das Laserdurchstrahl-Kunststoffschweißen darstellen. Abweichungen der optischen Eigenschaften während des Fügepro zesses gegenüber dem Zustand der Prozessauslegung können eine Überhitzung eines Fügepartners oder mangelnden Stoffschluss bewirken.Inadequate Joining joints can be used in laser-penetrant plastic welding on geometry errors of the joining partners or on the opposite Process design of modified optical properties of Joining partners based. Geometric errors can cause the thermal Contact between the joining partners is so affected be that the resulting heat conduction is insufficient, to plastify the transmissive joining partner locally. Typical geometry errors are notches or seams, where the Column caused by delay of the joining partners. In contrast to geometric defects, which also occur in conventional joining processes can lead to defective joints, can the optical properties - that are the reflection of a radiation on a surface as well the transmission, the absorption and the scattering on entering a radiation into a body - the joining partner a specific cause of failure for laser transmission plastic welding represent. Deviations of the optical properties during the Joining process compared to the state of the process design can cause overheating of a joining partner or cause a lack of substance.

In einem Spritzgießprozess, mittels dem die Fügepartner hergestellt werden, können durch die Wahl von Prozessparametern und der Werkzeugform sowohl die Geometrie als auch die optischen Eigenschaften in dem Kunststoffteil, insbesondere bei einem gefüllten, verstärkten oder hochkristallinen Kunststoff, beeinflusst werden. Während bei einem faserverstärkten Kunststoff Faseranhäufungen im Bereich eines Anspritzpunktes auftreten können, kann die Verarbeitung eines teilkristallinen Kunststoffs bei ungeeigneter Abkühlgeschwindigkeit zu einem erhöhten Kristallinitätsgrad führen. In beiden Fällen resultieren lokal variierende Transmissionswerte im Fügepartner.In an injection molding process, by means of which the joining partners can be produced by the choice of process parameters and the tool shape both the geometry and the optical Properties in the plastic part, especially in a filled, reinforced or highly crystalline plastic, influenced become. While with a fiber reinforced plastic Fiber accumulations occur in the region of a Anspritzpunktes can, can the processing of a semi-crystalline plastic at an unsuitable cooling rate to an increased Crystallinity level lead. In both cases This results in locally varying transmission values in the joining partner.

Für das Laserdurchstrahl-Kunststoffschweißen wird typischerweise ein Diodenlaser verwendet, dessen Strahlung im Infrarotbereich emittiert und damit für das menschliche Auge unsichtbar ist, so dass eine visuelle Qualitätsprüfung eines im Spritzguss hergestellten Fügepartners unzureichend ist. Für eine präventive Qualitätssicherung wird deshalb die Messung des Absorptions- bzw. Transmissionsverhaltens der Fügepartner mit einer Messstrahlung, deren Wellenlänge nahe der Wellenlänge der Bearbeitungsstrahlung ist, durchgeführt.For The laser-beam plastic welding typically becomes a diode laser is used whose radiation emits in the infrared range and thus invisible to the human eye, so that one visual quality inspection of an injection molded Joining partner is insufficient. For a preventive Quality assurance will therefore be the measurement of the absorption or transmission behavior of the joining partners with a Measuring radiation whose wavelength is close to the wavelength the processing radiation is performed.

Aus der DE 103 26 992 A1 ist eine Vorrichtung zur Messung von Transmissionswerten bekannt, wobei ein zu messendes Material zwischen einer Lichtquelle, die Messstrahlung emittiert, und einem Lichtsensor angeordnet ist. Der Lichtsensor erfasst ein Messsignal, das mit einem gemessenen Signal eines Referenzteils verglichen wird. Nachteilig ist hierbei die Notwendigkeit des Referenzteils selbst sowie eine mögliche Alterung des Refe renzteils, die eine Veränderung der optischen Eigenschaften zur Folge haben und somit zu abweichenden Messergebnissen führen kann.From the DE 103 26 992 A1 a device for measuring transmission values is known, wherein a material to be measured is arranged between a light source emitting measuring radiation and a light sensor. The light sensor detects a measurement signal, which is compared with a measured signal of a reference part. The disadvantage here is the necessity of the reference part itself as well as a possible aging of the Refe rence part, which have a change in the optical properties result and thus can lead to deviating measurement results.

Aus der DE 195 20 094 A1 ist eine Vorrichtung bekannt, mit welcher die Transmission und die Dicke von Folien oder Platten ermittelt werden kann. Die DE 10 2004 000 022 A1 offenbart ein Transmissionsmessgerät zur Bestimmung der optischen Durchlässigkeit von Werkstoffen. Aus der DE 10 2007 021 715 A1 ist eine automatische Werkstück-Rückkopplungskompensation beim Laserdurchstrahl-Kunststoffschweißen bekannt, bei der mittels einer integrierten Reflexionsmesseinrichtung ein vom transmissiven Fügepartner reflektierter Strahlungsanteil entlang einer Schweißkontur ermittelt wird, um damit eine Nachregelung der Laserleistung vorzunehmen. Allerdings lässt die Reflexion des transmissiven Fügepartners keine direkten Rückschlüsse auf einen für den Schweißprozess entscheidenden transmittierten Strahlungsanteil zu. Eine Anpassung der Laserleistung erfolgt in diesem Regelkreis mit zeitlichem Abstand zu der Erfassung der gemessenen Reflexion, so dass lokal hohe Gradienten der optischen Eigenschaften entlang der Schweißkontur wie beispielsweise Glasfaseranhäufungen nicht ausgeglichen werden können. Aus diesen Gründen ist die automatische Werkstück-Rückkopplungskompensation ungenau.From the DE 195 20 094 A1 a device is known with which the transmission and the thickness of films or plates can be determined. The DE 10 2004 000 022 A1 discloses a transmission meter for determining the optical transmission of materials. From the DE 10 2007 021 715 A1 an automatic workpiece feedback compensation in laser transmission plastic welding is known, in which by means of an integrated reflection measuring device reflected by the transmissive joining partner radiation component along a welding contour is determined in order to make a readjustment of the laser power. However, the reflection of the transmissive joining partner does not allow any direct conclusions to be drawn on a transmitted radiation component that is decisive for the welding process. An adjustment of the laser power takes place in this control loop at a time interval from the detection of the measured reflection, so that locally high gradients of the optical properties along the weld contour, such as, for example, glass fiber clusters, can not be compensated. For these reasons, the automatic workpiece feedback compensation is inaccurate.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren für das Laserdurchstrahl-Kunststoffschweißen zu schaffen, das die lokalen Unterschiede der transmissiven Materialeigenschaften entlang einer Kontur einer zu erstellenden Schweißnaht für die Steuerung eines nachfolgenden Schweißprozesses berücksichtigt.Of the Invention is based on the object, a method for to create the laser beam plastic welding, the the local differences of the transmissive material properties along a contour of a weld to be created considered for the control of a subsequent welding process.

Die Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst. Der Kern der Erfindung besteht darin, ein Transmissionsprofil eines transmissiven Fügepartners entlang einer Kontur einer zu erstellenden Schweißnaht zu bestimmen. In einem nachfolgenden Fügeprozess wird eine Strahlquelle entlang der Kontur geführt, wobei der Fügeprozess derart gesteuert wird, dass an Stellen verringerter Transmission ein erhöhter Energieeintrag erfolgt.The object is solved by the features of claim 1. The core of the invention exists It is to determine a transmission profile of a transmissive joining partner along a contour of a weld to be created. In a subsequent joining process, a beam source is guided along the contour, wherein the joining process is controlled in such a way that an increased energy input takes place at points of reduced transmission.

Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.Further advantageous embodiments of the invention will become apparent from the Dependent claims.

Zusätzliche Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung anhand der Zeichnung. Es zeigen:additional Features and details of the invention will become apparent from the following Description based on the drawing. Show it:

1 eine schematische Darstellung einer Anordnung zur Messung der Transmission eines transmissiven Fügepartners, 1 a schematic representation of an arrangement for measuring the transmission of a transmissive joining partner,

2 einen Querschnitt einer Fügeverbindung eines transmissiven Fügepartners und eines absorbierenden Fügepartners, 2 a cross section of a joint connection of a transmissive joining partner and an absorbent joining partner,

3 eine Draufsicht eines transmissiven Fügepartners mit einer Darstellung einer Kontur einer zu erstellenden Schweißnaht und 3 a plan view of a transmissive joining partner with a representation of a contour of a weld to be created and

4 und 5 eine Darstellung eines Transmissionsprofils und eines korrespondierenden Laserleistungsprofils. 4 and 5 a representation of a transmission profile and a corresponding laser power profile.

Eine in der 1 dargestellte Vorrichtung 1 dient der Messung einer Transmission eines transmissiven Fügepartners 2. Dazu wird der transmissive Fügepartner 2 von einer Messstrahlung 3, die von einer Strahlquelle 4 ausgeht, bestrahlt. Auf einer der Strahlquelle 4 gegenüberliegenden Seite des transmissiven Fügepartners 2 ist ein Lichtdetektor 5 angeordnet, der eine transmittierte Messstrahlung 6 erfasst. Aus einem Vergleich der Messstrahlung 3 und der transmittierten Messstrahlung 6 kann die Transmission des transmissiven Fügepartners 2 ermittelt werden.One in the 1 illustrated device 1 serves to measure a transmission of a transmissive joining partner 2 , This is the transmissive joining partner 2 from a measuring radiation 3 coming from a beam source 4 goes out, irradiated. On one of the beam source 4 opposite side of the transmissive joining partner 2 is a light detector 5 arranged, which transmits a transmitted measuring radiation 6 detected. From a comparison of the measuring radiation 3 and the transmitted measuring radiation 6 can the transmission of the transmissive joining partner 2 be determined.

2 zeigt einen Querschnitt einer Fügeverbindung, die im Laserdurchstrahl-Kunststoffschweißen hergestellt wird. Dazu werden der transmissive Fügepartner 2 und ein absorbierender Fügepartner 7 derart angeordnet, dass eine Bearbeitungsstrahlung 8 ausgehend von der Strahlquelle 4 durch den transmissiven Fügepartner 2 durchstrahlt und von dem absorbierenden Fügepartner 7 absorbiert wird. Infolge eines Fügeprozesses bildet sich eine Fügezone 9 aus. 2 shows a cross section of a joint, which is produced in the laser beam plastic welding. These are the transmissive joining partner 2 and an absorbent mating partner 7 arranged such that a processing radiation 8th starting from the beam source 4 through the transmissive joining partner 2 radiates through and from the absorbent joining partner 7 is absorbed. As a result of a joining process, a joining zone is formed 9 out.

In 3 ist eine Draufsicht auf den transmissiven Fügpartner 2 mit einer Kontur 10 einer zu erstellenden Schweißnaht dargestellt. Vor der Durchführung des Fügeprozesses erfolgt die Messung der Transmission des transmissiven Fügepartners 2 entlang der Kontur 10. Damit kann ein Bereich verringerter Transmission 11, der sich beispielsweise um einen Anspritzpunkt 12 ausbilden kann, identifiziert werden.In 3 is a plan view of the transmissive joining partner 2 with a contour 10 a weld to be created. Before the joining process is carried out, the transmission of the transmissive joining partner is measured 2 along the contour 10 , This allows a range of reduced transmission 11 For example, it is an injection point 12 can be identified.

4 zeigt ein Transmissionsprofils 13 des transmissiven Fügepartners 2 als funktionalen Zusammenhang zwischen der Transmission T und einem Weg s entlang der Kontur 10. In 5 ist ein zu dem Transmissionsprofil 13 korrespondierendes Laserleistungsprofil 14 als funktionaler Zusammenhang zwischen einer Laserleistung P und dem Weg s entlang der Kontur 10 dargestellt. 4 shows a transmission profile 13 of the transmissive joining partner 2 as a functional relationship between the transmission T and a path s along the contour 10 , In 5 is one to the transmission profile 13 corresponding laser power profile 14 as a functional relationship between a laser power P and the path s along the contour 10 shown.

In dem nachfolgenden Fügeprozess wird die Bearbeitungsstrahlung 8 mit einer Relativgeschwindigkeit bzgl. der Fügepartner 2, 7 entlang der Kontur 10 geführt, um die Schweißnaht zu erstellen. Dabei erfolgt in Bereichen verringerter Transmission 11 des transmissiven Fügepartners 2 ein erhöhter Energieeintrag in die Fügezone 9. Dazu kann die Laserleistung der Bearbeitungsstrahlung 8 bei konstanter Relativgeschwindigkeit zwischen der Bearbeitungsstrahlung 8 und den Fügepartnern 2, 7 erhöht werden. Die Reduzierung der Relativgeschwindigkeit zwischen der Bearbeitungsstrahlung 8 und den Fügepartnern 2, 7 bei konstanter Laserleistung der Bearbeitungsstrahlung 8 bewirkt ebenfalls eine Erhöhung des Energieeintrags in die Fügezone 9. Weiterhin ist auch eine Kombination beider Einflüsse derart möglich, dass die Laserleistung der Bearbeitungsstrahlung 8 bei verringerter Relativgeschwindigkeit zwischen der Bearbeitungsstrahlung 8 und den Fügepartnern 2, 7 erhöht wird.In the subsequent joining process, the processing radiation 8th with a relative speed with respect to the joining partner 2 . 7 along the contour 10 guided to create the weld. This takes place in areas of reduced transmission 11 of the transmissive joining partner 2 an increased energy input into the joining zone 9 , For this, the laser power of the processing radiation 8th at a constant relative speed between the machining radiation 8th and the joining partners 2 . 7 increase. The reduction of the relative speed between the processing radiation 8th and the joining partners 2 . 7 at constant laser power of the machining radiation 8th also causes an increase in the energy input into the joining zone 9 , Furthermore, a combination of both influences is possible such that the laser power of the processing radiation 8th at reduced relative speed between the processing radiation 8th and the joining partners 2 . 7 is increased.

ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION

Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Zitierte PatentliteraturCited patent literature

  • - DE 4432081 A1 [0002] - DE 4432081 A1 [0002]
  • - DE 10326992 A1 [0006] - DE 10326992 A1 [0006]
  • - DE 19520094 A1 [0007] - DE 19520094 A1 [0007]
  • - DE 102004000022 A1 [0007] - DE 102004000022 A1 [0007]
  • - DE 102007021715 A1 [0007] - DE 102007021715 A1 [0007]

Claims (7)

Verfahren für das Laserdurchstrahl-Kunststoffschweißen, gekennzeichnet durch folgende Verfahrensschritte: – Erstellen eines Transmissionsprofils (13) eines transmissiven Fügepartners (2) entlang einer Kontur (10) einer zu erstellenden Schweißnaht, – Führen einer Bearbeitungsstrahlung (8) mit einer Laserleistung in eine Fügezone (9) für einen nachfolgenden Fügeprozess mit einem absorbierenden Fügepartner (7) entlang der Kontur (10) und dabei – Steuerung des Fügeprozesses derart, dass in einem Bereich verringerter Transmission (11) des transmissiven Fügepartners (2) ein erhöhter Energieeintrag in die Fügezone (9) erfolgt.Process for laser-penetrating plastic welding, characterized by the following process steps: - creation of a transmission profile ( 13 ) of a transmissive joining partner ( 2 ) along a contour ( 10 ) of a weld to be created, - guiding a machining radiation ( 8th ) with a laser power in a joining zone ( 9 ) for a subsequent joining process with an absorbent joining partner ( 7 ) along the contour ( 10 ) and thereby - control of the joining process such that in a range of reduced transmission ( 11 ) of the transmissive joining partner ( 2 ) an increased energy input into the joining zone ( 9 ) he follows. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Erstellung des Transmissionsprofils (13) durch Messung einer durch den transmissiven Fügepartner (2) transmittierten Messstrahlung (6) mit einem Lichtdetektor (5) erfolgt.A method according to claim 1, characterized in that the creation of the transmission profile ( 13 ) by measuring one through the transmissive joining partner ( 2 ) transmitted measuring radiation ( 6 ) with a light detector ( 5 ) he follows. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass die Wellenlänge der Messstrahlung (3) in direkter Beziehung zu der Wellenlänge der Bearbeitungsstrahlung (8) steht.A method according to claim 2, characterized in that the wavelength of the measuring radiation ( 3 ) in direct relation to the wavelength of the processing radiation ( 8th ) stands. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass die Wellenlänge der Messstrahlung (3) und die Wellenlänge der Bearbeitungsstrahlung (8) gleich sind.A method according to claim 3, characterized in that the wavelength of the measuring radiation ( 3 ) and the wavelength of the processing radiation ( 8th ) are the same. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der erhöhte Energieeintrag durch Erhöhung einer Laserleis tung der Bearbeitungsstrahlung (8) insbesondere bei konstanter Relativgeschwindigkeit zwischen der Bearbeitungsstrahlung (8) und den Fügepartnern (2, 7) erfolgt.Method according to one of claims 1 to 4, characterized in that the increased energy input by increasing a Laserleis tion of the processing radiation ( 8th ) in particular at a constant relative speed between the machining radiation ( 8th ) and the joining partners ( 2 . 7 ) he follows. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der erhöhte Energieeintrag durch Reduzierung der Relativgeschwindigkeit zwischen der Bearbeitungsstrahlung (8) und den Fügepartnern (2, 7) insbesondere bei konstanter Laserleistung der Bearbeitungsstrahlung (8) erfolgt.Method according to one of claims 1 to 5, characterized in that the increased energy input by reducing the relative speed between the processing radiation ( 8th ) and the joining partners ( 2 . 7 ) in particular at a constant laser power of the machining radiation ( 8th ) he follows. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass eine automatisierte Abfolge der Verfahrensschritte erfolgt.Method according to one of claims 1 to 6, characterized in that an automated sequence of Process steps takes place.
DE102008038014A 2008-08-16 2008-08-16 Method for laser transmission beam welding of plastic, comprises generating a transmission profile of a transmissive joining partners along a contour of a welding seam to be generated and guiding a processing radiation with a laser power Ceased DE102008038014A1 (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
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DE102012201426A1 (en) 2012-02-01 2013-08-01 Leibniz-Institut Für Polymerforschung Dresden E.V. PROCESS FOR JOINING PLASTICS AND METHOD FOR RELEASING A CONNECTION IN THE PLASTIC COMPOSITE AND PLASTIC COMPOSITE
WO2013113676A2 (en) 2012-02-01 2013-08-08 Leibniz-Institut Für Polymerforschung Dresden E.V. Method for bonding plastics and method for releasing a bond in the plastic composite and a plastic composite
US9446574B2 (en) 2012-02-01 2016-09-20 Leibniz-Institut Fuer Polymerforschung Dresden E.V. Method for bonding plastics and method for releasing a bond in the plastic composite and a plastic composite
US10899044B2 (en) 2014-06-05 2021-01-26 Fraunhofer Gesellschaft Zur Forderung Der Angewandten Forschung E.V. Mold, method for the production and use thereof, plastic film and plastic component
DE102016116608A1 (en) 2016-09-06 2018-03-08 Invendo Medical Gmbh Linear laser welding of tubular plastic elements
DE102016216844A1 (en) 2016-09-06 2018-03-08 Evosys Laser GmbH Method for laser-plastic welding and device
WO2018046291A1 (en) * 2016-09-06 2018-03-15 Evosys Laser GmbH Method for laser beam plastic welding, and device
CN109641399A (en) * 2016-09-06 2019-04-16 易沃斯激光系统股份有限公司 Method and apparatus for the welding of laser beam plastics
US11014308B2 (en) 2016-09-06 2021-05-25 Evosys Laser GmbH Method for laser beam plastic welding, and device
DE102016216844B4 (en) * 2016-09-06 2021-06-17 Evosys Laser GmbH Process for laser beam plastic welding and device
JPWO2018181073A1 (en) * 2017-03-29 2020-03-19 株式会社トヨタカスタマイジング＆ディベロップメント Joining system and joining method
JP7016083B2 (en) 2017-03-29 2022-02-04 株式会社トヨタカスタマイジング＆ディベロップメント Joining system and joining method

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