WO2016063720A1 - Procédé de soudage et dispositif de soudage - Google Patents

Procédé de soudage et dispositif de soudage Download PDF

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Publication number
WO2016063720A1
WO2016063720A1 PCT/JP2015/078341 JP2015078341W WO2016063720A1 WO 2016063720 A1 WO2016063720 A1 WO 2016063720A1 JP 2015078341 W JP2015078341 W JP 2015078341W WO 2016063720 A1 WO2016063720 A1 WO 2016063720A1
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WO
WIPO (PCT)
Prior art keywords
light
laser
welding
welded portion
welded
Prior art date
Application number
PCT/JP2015/078341
Other languages
English (en)
Japanese (ja)
Inventor
裕至 提坂
聰 山梨
拓樹 古杉
Original Assignee
株式会社小糸製作所
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Filing date
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Application filed by 株式会社小糸製作所 filed Critical 株式会社小糸製作所
Publication of WO2016063720A1 publication Critical patent/WO2016063720A1/fr

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    • 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
    • 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
    • B23K26/32—Bonding taking account of the properties of the material involved
    • B23K26/324—Bonding taking account of the properties of the material involved involving non-metallic parts
    • 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
    • B23K26/50—Working by transmitting the laser beam through or within the workpiece
    • B23K26/57—Working by transmitting the laser beam through or within the workpiece the laser beam entering a face of the workpiece from which it is transmitted through the workpiece material to work on a different workpiece face, e.g. for effecting removal, fusion splicing, modifying or reforming
    • 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
    • B29C65/1677—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
    • 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
    • B29C65/1687—Laser beams making use of light guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/301—Three-dimensional joints, i.e. the joined area being substantially non-flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/345—Progressively making the joint, e.g. starting from the middle
    • B29C66/3452—Making complete joints by combining partial 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81266—Optical properties, e.g. transparency, reflectivity
    • B29C66/81267—Transparent to electromagnetic radiation, e.g. to visible light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/29—Attachment thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/747—Lightning equipment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/28—Cover glass

Definitions

  • the present invention relates to a welding method and a welding apparatus that realizes highly reliable welding by projecting light such as laser light onto a welding portion.
  • One of the steps for manufacturing a lamp for a vehicle is a step of integrally fixing a transparent front cover to a container-shaped lamp body, and a method of welding the lamp body and the front cover is used as the step of fixing.
  • a lamp housing is constituted by a container-shaped lamp body 1 having a front opening as shown in FIG. 1 and a transparent resin front cover 2 fixed to the front opening of the lamp body 1
  • the peripheral edge 1a of the front opening 1 and the peripheral edge 2a of the front cover 2 are brought into close contact with each other, and both of them are welded at the close contact portions.
  • a seal leg 21 is formed in a wall shape on the inner peripheral side (lower side in FIG. 1) on the peripheral edge of the front cover 2, and the end surface 21 a and the peripheral edge 1 a of the seal leg 21 are welded as a welded part 3. ing.
  • a laser welding technique in which a laser beam is projected onto the welding part 3 to melt the welding part.
  • the scanning method is a technique of welding while moving a laser head that emits laser light along the welding portion.
  • the galvano method is a technique in which light from a laser head that is fixedly installed is projected and welded to a welded part while deflecting (changing the irradiation direction) using a movable mirror or the like.
  • the flash type is a technique in which a plurality of laser heads are arranged along a welding surface, and laser light is projected from each laser head to a welding portion to perform welding.
  • the galvano type can melt the weld at high speed and at the same time, but depending on the three-dimensional shape of the weld, there is a part where the laser beam cannot be projected at a small incident angle. It is difficult to perform high welding.
  • the flash type does not cause problems like the scan type or the galvano type, but it is necessary to arrange a plurality or many laser heads along the length direction of the welded part, and the equipment cost of the welding apparatus is increased. It will be expensive.
  • An object of the present invention is to provide a welding method and a welding apparatus that realizes highly reliable welding while suppressing an increase in equipment cost.
  • the welding method of the present invention is a welding method in which welding is performed by projecting a laser beam onto a welding portion of an object to be welded that is extended in a band shape, and a first laser projection means is disposed opposite the welding portion.
  • the first laser projection means projects laser light onto a partial region in the extension direction of the welded portion
  • the second laser projection means that controls the deflection of the laser light at the other region of the welded portion. May project laser light.
  • the welding apparatus is a welding apparatus that performs welding by projecting laser light onto a welding portion that is extended in a belt shape of an object to be welded, and is a first laser projection means that is disposed to face the welding portion. And a transparent jig for bringing the welded portion of the object to be welded into close contact with each other, and laser light emitted from each laser projection means provided in the transparent jig is transmitted through the transparent jig.
  • a light shaping unit that shapes the light beam shape, and the light shaping unit expands the light beam shape of the laser light in the extending direction of the welded portion, and matches the width dimension in the width direction of the welded portion. It is characterized by comprising reflection means.
  • the light shaping section is composed of a lens or a light reflector that diverges light in the extending direction of the welded portion and collects light in the width direction of the welded portion.
  • a second laser projection unit that projects the laser beam while deflecting the laser beam to another region of the welded portion is provided, and the first laser projection unit does not project the laser beam by the second laser projection unit. It arrange
  • the first laser projection unit is a flash laser projection device
  • the second laser projection unit is a galvano laser projection device.
  • the light beam shape of the laser light emitted from the first laser projection unit is expanded in the extending direction of the welded portion, and the width in the width direction of the welded portion is increased.
  • laser light can be projected onto the welded portion as necessary and sufficient spot light.
  • high-quality welding at the welded portion can be realized, laser beam damage to portions other than the welded portion can be prevented, and the number of first laser projection means can be reduced to reduce equipment costs. it can.
  • the perspective view of an example of the lamp housing to which this invention is applied The conceptual block diagram which shows the whole structure of a welding apparatus. The figure which compares and shows the shape of the spot light projected on a welding part with the typical side view of a part of welding apparatus.
  • the typical side view of the welding apparatus for demonstrating the height of a light shaping part. Sectional drawing of the principal part of embodiment which comprised the light shaping part with the light reflector. Sectional drawing of the principal part of other embodiment which comprised the light shaping part with the light reflector. Sectional drawing of the principal part of embodiment which made the light shaping part corresponding also to a 2nd laser projection means.
  • FIG. 2 is a conceptual configuration diagram showing the overall configuration of the embodiment of the welding apparatus 100 according to the present invention.
  • a lamp housing of an automobile headlamp is illustrated.
  • the peripheral edge portion 1a of the lamp body 1 made of black resin and the end face 21a of the seal leg 21 of the peripheral edge portion 2a of the front cover 2 are brought into intimate contact, and the intimate portion is used as a weld portion 3 to weld them together. Is configured.
  • the lamp body 1 and the front cover 2 are welded along the entire periphery, and accordingly, a portion extending in a strip shape with a required width dimension along the entire periphery, that is, the periphery 1a and the seal leg 21 are extended.
  • the end surface 21 a becomes the welded portion 3.
  • the peripheral edge 1 a serving as the welded portion 3 is made of a resin that absorbs light and is heated and melted by laser light.
  • the peripheral edge 1a is made of a resin containing a light-absorbing material such as carbon.
  • the front cover 2 is made of a transparent resin that transmits light, but is made of a resin that can be melted by heat when the lamp body 1 is melted.
  • the seal leg 21 protrudes from the peripheral edge 2a of the inner surface of the front cover 2, the seal leg 21 to be the welded portion 3 is made of such a resin.
  • the welding apparatus 100 has a base 101.
  • the lamp body 1 is placed on the base 101 with the opening facing upward, and the front cover 2 is positioned and placed thereon. Placed.
  • the welding apparatus 100 includes a transparent jig 102 having a thick plate shape.
  • the transparent jig 102 is moved downward from above the front cover 2 by a pressing mechanism that is not shown or described.
  • the peripheral portion of the front cover 2 or the end surface 21a of the seal leg 21 is brought into close contact with the peripheral portion 1a of the lamp body 1 by contacting the outer surface of the front cover 2 (the upper surface in FIG. 2) and applying a required pressing force. Let That is, the welding part 3 of the lamp body 1 and the front cover 2 is brought into a close contact state.
  • one galvano laser projection unit 103 is disposed above the base 101, and a flash laser projection unit 104 is disposed on one side of the base 101. Yes.
  • the flash type laser projection unit 104 is a first laser projection unit in the present invention
  • the galvano type laser projection unit 103 is a second laser projection unit in the present invention.
  • the galvano-type laser projection unit 103 uses a known laser projection device as it is, so that illustration and detailed description thereof are omitted here, but a laser light source (laser oscillator) and the laser light source are emitted from the laser light source. And a galvanometer mirror that controls the deflection of the projected direction of the laser beam, and projects the beam-shaped laser beam while scanning at high speed along the welded portion 3 of the lamp body 1 and the front cover 2 that are to be welded. Is configured to do.
  • the flash type laser projection unit 104 includes a laser light source 105, a plurality of optical fibers 106 each having one end optically coupled to the laser light source 105, and a projection head 107 connected to the other end of each optical fiber 106. I have.
  • the flash type laser projection unit 104 causes the light emitted from the laser light source 105 to enter one end of the optical fiber 106, and collects the light guided through the optical fiber 106 and emitted from the other end by the projection head 107. In this configuration, light or divergence is projected onto the weld portion 3.
  • the projection head 107 incorporates an optical system such as a lens for condensing or diverging light emitted from the optical fiber 106 while maintaining the circular shape of the light beam, but the description thereof is omitted.
  • the flash type laser projection unit 104 includes one or a plurality of projection heads 107, but here, an example of four projection heads 107 is shown to simplify the description. .
  • the four projection heads 107 of the flash type laser projection unit 104 may be configured as four flash type laser projection units each having an independent laser light source, but here, the four projection heads 107 constitute one laser light source.
  • 105 is configured as one flash type laser projection unit 104 configured in common.
  • the flash type laser projection unit 104 is disposed along a partial region 3 a in the circumferential direction of the welded unit 3. That is, the welded portion 3 extends along the entire periphery of the lamp body 1 and the front cover 2, and the laser light projected from the galvano laser projection portion 103 of the welded portion 3 is transmitted through the transparent jig 102. A region where the incident angle when entering the surface or the incident angle when passing through the transparent jig 102 and entering the welded portion 3 becomes the partial region 3a, and the flash type laser projection is applied to the partial region. A portion 104 is provided.
  • the welded portion 3 welded to the lamp body 1 is also often directed in the three-dimensional direction. . Therefore, when the lamp body 1 and the front cover 2 are placed on the base 101 of the welding apparatus 100 and the laser light projected from the galvano laser projection unit 103 is scanned along the welding unit 3 as shown in FIG. Moreover, the incident angle of the laser beam in the partial region 3a of the welded portion 3 is significantly larger than that in other regions. In such a region where the incident angle is large, the energy efficiency of the laser beam when projected onto the welded portion 3 is lowered compared to the other region 3b where the incident angle is small, and the welding quality is degraded.
  • the flash type laser projection unit 104 is arranged along the partial region 3a of the welded part 3 where the incident angle of the laser light projected from the galvano type laser projecting part 103 is increased and the welding quality may be deteriorated.
  • the flash type laser projection unit 104 projects laser light onto the partial area 3a.
  • the galvano laser projection unit 103 is configured to project the laser beam only to the other region 3b so as not to project the laser beam to the partial region 3a.
  • the front cover 2 is positioned and placed on the lamp body 1 placed on the base 101, and the transparent jig 102 is placed thereon.
  • the front cover 2 and the welded portion 3 of the lamp body 1 are brought into close contact with each other.
  • the galvano-type laser projection unit 103 projects the laser beam while scanning the welded region 3b having a required incident angle or less.
  • the projected laser light is transmitted through the transparent jig 102, further transmitted through the front cover 2, and projected onto the welded portion 3 with the lamp body 1 to perform welding in the region 3b.
  • the laser beam is projected from each of the four projection heads 107 of the flash type laser projection unit 104.
  • the laser beams from these four projection heads 107 are transmitted through the transparent jig 102 and projected onto the welded portions 3 of the lamp body 1 and the front cover 2. Since each laser beam is projected at a predetermined interval along the extending direction of the welded portion 3, the projection area where these laser beams are combined extends over almost the entire region 3a of the welded portion 3, and the part Welding in the region 3a is performed.
  • the region 3b in which the laser light emitted from the galvano laser projection unit 103 is incident at a small incident angle in the welding unit 3 where the welding is performed is generated by the laser light from the galvano laser projection unit 103. Since it is welded, the energy of the laser beam is not reduced, and rapid and high-quality welding is possible.
  • the partial region 3 a of the welded portion 3 where the incident angle of the laser light from the galvano laser projection unit 103 becomes large is caused by the laser light linearly projected from the four projection heads 107 of the flash laser projection unit 104. Since welding is performed, high-quality welding is realized by energy with less attenuation of the laser beam.
  • this welding apparatus 100 many parts of the welding part 3 are welded by the galvano type laser projection unit 103, while areas where welding is not preferable in the galvano type laser projection part 103 are welded by the flash type laser projection unit 104. Will be realized. As a result, it is possible to realize welding that takes advantage of the rapidity of the galvano laser projection unit 103 and the high quality of the flash laser projection unit 104. Further, as compared with the case where all the welding parts 3 are welded by the flash type laser projection part 104, the flash type laser projection parts 104 or the projection heads 107 can be limited to the minimum necessary number, and the equipment cost of the welding apparatus can be reduced. be able to.
  • the flash type laser projection unit 104 condenses or diverges the laser beam emitted from the other end of the optical fiber 106 and projects it onto the welded portion.
  • the light beam is projected onto the welded portion as a circular light beam shaped spot light.
  • the circular diameter R ⁇ b> 2 of the spot light SP ⁇ b> 2 projected from the projection head 107 is the welding width W of the welded portion 3, as shown in the projection pattern of the laser light projected onto the welded portion 3.
  • the size is approximately the same as the width dimension in the direction orthogonal to the extension direction of the welded portion, a non-projection area is generated between the spot lights SP2 projected adjacently, and welding in this area cannot be performed.
  • the number of laser projection units 104 increases, and the equipment cost increases.
  • the interval L3 between the adjacent spot lights SP3 is also increased. It is effective to enable reliable welding of the portion 3 and to reduce the number of the projection heads 107 disposed. However, in this case, there is a problem that a part of the projected spot light SP3 protrudes outside the welded portion 3 and is projected to an area other than the welded portion 3, and a part existing in the protruded area is burnt. May occur.
  • the transparent jig 102 is provided with each projection head 107 of the flash type laser projection unit 104 as schematically shown in FIG.
  • a light shaping unit 110 for shaping the light beam shape of the laser light is provided in the corresponding region.
  • the light shaping unit 110 is configured as a shaping lens (light refracting means) obtained by processing a surface portion on which laser light is incident, of the surface of the transparent jig.
  • a concave portion 111 having a square shape larger than the spot diameter is provided on the laser light incident surface of the transparent jig 102 and formed as a shaping lens having an inner bottom surface of the concave portion 111 as a lens surface 112.
  • the light shaping unit 110 is a lens having light divergence in the extending direction of the welded portion 3 (hereinafter referred to as L direction) and having light condensing properties in the width direction of the welded portion 3 (hereinafter referred to as W direction).
  • L direction the extending direction of the welded portion 3
  • W direction the width direction of the welded portion 3
  • the cross-sectional shape of the welding part 3 in the L direction is a concave curved surface
  • the cross-sectional shape of the welding part 3 in the W direction is a convex curved surface.
  • spot light projected from the projection head 107 is transmitted through the transparent jig 102 as shown in FIG. Is diverged to enlarge the diameter dimension in the L direction, and is condensed in the W direction to reduce the diameter dimension in the W direction. As a result, it is shaped into an elliptical or oval spot light having a major axis R1l in the L direction and a minor axis R1w in the W direction and projected onto the welded portion 3.
  • interval L1 of the L direction of the adjacent projection head 107 is adjusted, or each curvature of the concave curved surface and convex curved surface of the lens surface 112 of the light shaping part 110 is adjusted.
  • FIG. 3B by making the adjacent spot lights SP1 appropriately overlapped with each other in the L direction, a non-projection region is not generated between the adjacent spot lights SP1, and the laser Welding failure due to non-projection of light can be prevented. Further, it is possible to suppress the spot light SP1 from greatly protruding outside the welded portion in the W direction, and it is possible to prevent the region other than the welded portion from being burned. As a result, the effective efficiency of the laser beam at the time of welding can be increased, and welding with a laser beam with low energy can also be realized.
  • the adjacent spot light SP1 can be separated in the L direction, and as a result, the interval dimension L1 of the adjacent projection heads 107 is adjacent. It can be made as large as the interval L1 of the spot light SP1.
  • the number of flash type laser projection units 104 or projection heads 107 to be arranged when the length of the welded portion 3 welded by the flash type laser projection unit 104, in this case, the partial region 3a in the L direction is equal. It becomes possible to reduce, and the installation cost can be reduced.
  • the region where the adjacent spot light is superimposed is appropriately adjusted, and the light in the superimposed region is It may not be easy to adjust the energy so that it does not differ greatly from the light energy in the non-overlapping area.
  • the shape of the light shaping unit 110 may be partially changed as shown in FIG.
  • FIG. 5 is a view similar to FIG. 4.
  • the four sides of the concave portion 111 ⁇ / b> A of the light shaping unit 110 are curved inward so as to form an arcuate shape or a curved surface close thereto.
  • the lens surface 112 is also shaped accordingly. Therefore, the spot light incident on the lens surface 112 is prevented from being diffused in a region corresponding to the four sides of the recess 111A, and condensing is promoted. As a result, the spot light is projected onto the welded portion 3.
  • the spot light SP1a is shaped into a rectangular or elongated strip having a long side in the L direction.
  • each lens surface 112 of the light shaping unit 110 corresponding to each of the four projection heads 107 is designed to be the same, as shown in FIG. It is important to make the heights H from the same. That is, the laser light emitted from the projection head 107 is a substantially parallel light beam, and the spot light when projected onto the welded part 3 by the optical path length after being condensed and diverged by the lens surface 112 of the light shaping part 110. This is because the dimensions are determined. Therefore, when the welding part 3 has a wave shape with respect to the horizontal direction as shown in FIG. 6, the height position of the light shaping part 110 formed on the transparent jig 102 is set according to the wave shape. is required.
  • the height position has been described on the assumption that the optical refractive index of the transparent jig 102 and the optical refractive index of the front cover 2 are substantially equal. However, when the optical refractive indexes of the two are different. It is preferable to design the height position of the light shaping unit 110 in consideration of the difference in effective optical path length caused by the difference in the optical refractive index.
  • the light shaping unit is constituted by a shaping lens, but may be constituted by a light reflector (light reflecting means).
  • FIG. 7 is a cross-sectional view of a main part of an embodiment in which the light shaping unit 120 according to the present invention is configured by a light reflector.
  • the light shaping unit 120 a pair of light reflecting walls 121 are erected on the laser light incident surface of the transparent jig 102 immediately below the projection head 107 and almost directly above the welded portion 3.
  • the opposing surface of each light reflecting wall 121 is formed as a light reflecting surface, and each light reflecting surface sandwiches the welded portion 3 in the W direction and is substantially the same as the width dimension of the welded portion 3. They are opposed to each other in the state of being opened in a reverse C-shape substantially in parallel or upwardly at the same facing interval.
  • the laser light emitted from the projection head 107 is incident between the pair of light reflecting walls 121.
  • the laser light emitted from the projection head 107 is reflected by the light reflecting surface of each light reflecting wall 121. .
  • the reflected laser light is directed to the opposing light reflecting wall 121 and is reflected again here.
  • the repeated light reflection at both the light reflecting walls 121 condenses the laser light in the W direction of the welded portion 3 and diverges the laser light in the L direction of the welded portion 3.
  • the laser beam is transmitted through the transparent jig 102 while being repeatedly reflected by the light reflecting walls 121 and finally projected onto the welded portion 3.
  • the laser beam emitted from the projection head 107 is condensed in the W direction of the welded portion 3 and diverged in the L direction by the light reflection of the laser beam at the light shaping unit 120 repeatedly. Shaped into light.
  • the spot light emitted from the four projection heads 107 and projected onto the welded portion 3 is coupled in the L direction.
  • the laser beam is integrated into a belt-like shape, and is projected onto the entire corresponding partial region of the welded portion 3 without protruding in the width direction of the welded portion 3.
  • the pair of light reflecting walls 121 is erected on the transparent jig 102 as the light shaping section.
  • a part of the transparent jig 102 or another member protrudes to the surface.
  • a transparent wall 131 may be formed, and the light shaping unit 130 may be configured in which both side surfaces of the transparent wall 131 are configured as light reflecting surfaces 132.
  • the light reflecting surface 132 can be easily configured by forming films such as an aluminum film on both surfaces of the transparent wall 131.
  • the transparent wall 131 is disposed immediately below the projection head 107 and above the welded portion 3.
  • the light emitted from the projection head 107 is incident on the top surface of the transparent wall 131, is transmitted through the transparent wall 131 while being reflected by the light reflecting surfaces 132 on both sides, and is projected onto the welded portion. Is done.
  • the laser light is condensed in the W direction of the welded portion 3 by the reflection at the light reflecting surface 132 and is diverged in the L direction. Therefore, the spot light projected on the welded portion 3 is substantially equal to the width dimension of the welded portion 3 in the W direction, and the laser beams of the four projection heads 107 are connected in the L direction to correspond to the welded portion 3. It is the same as that in the above embodiment that the laser beam is shaped into a strip-shaped laser beam.
  • the light shaping unit configured as a light reflector is an area where the projection head 107 of the flash type laser projection unit 104 is not provided, that is, a galvano type laser projection. You may arrange
  • FIG. FIG. 9 shows an embodiment provided with a light shaping unit 120A using the light shaping unit 120 of FIG. 7, and among the paired light reflecting walls 121, the outer light reflecting wall 121a is changed to the inner light reflecting side. It is comprised so that it may protrude upwards rather than the wall 121b.
  • the other configuration of the light shaping unit 120A is substantially the same as the configuration of FIG.
  • the light shaping unit 120A has an incident angle when the laser light from the galvano laser projection unit 103 is incident on the partial region 3a in the region 3b excluding the partial region 3a of the welded portion 3 shown in FIG. Even if it is not as large as the incident angle at, it is preferable to arrange it in a region where the incident angle of the laser beam is relatively large. Of course, as shown in FIG. 7, it may be disposed in a partial region 3a, or may be disposed over the entire region of the welded portion 3.
  • the laser beam from the galvano laser projection unit 103 is configured to enter the light shaping unit 120A, the incident laser beam is first reflected by the outer light reflection wall 121a and opposed to the light reflection wall 121b. Directed to. By repeating the light reflection at these light reflecting walls 121, the laser light from the galvano-type laser projection unit 103 is condensed in the W direction of the welded portion, diverged in the L direction, and projected onto the welded portion 3. Thereby, it is the same as that of the said embodiment that the suitable welding in the welding part 3 is realizable.
  • the flash type laser projection unit of the present invention is not limited to the configuration having four projection heads as described in the embodiment, and can be projected by the length of the welded portion in the L length direction and one projection head. From the relationship with the length of the laser beam in the L direction, the number of projection heads that can appropriately weld the welded portions may be designed. In the case where one flash laser projection unit includes one projection head, the number of flash laser projection units may be replaced with the number of projection heads described above.
  • the welding apparatus of the present invention is not necessarily limited to the configuration in which the galvano type laser projection unit and the flash type laser projection unit are provided side by side. This is effective in improving the reliability of welding by the laser projection unit and reducing the number of flash laser projection units to reduce the equipment cost. Further, the number of projection heads of the flash type laser projection unit is arbitrary, and it can be configured by one or a plurality of projection heads according to the form of the welded part.
  • the light shaping unit for shaping the light beam shape of the laser light according to the present invention is not limited to the configuration described in the embodiment, and the shape of the shaping lens or the light reflecting wall according to the difference in the shape and size of the welded part. It is possible to appropriately change the shape of the transparent wall.
  • the present invention can be applied to a welding method and a welding apparatus in which a laser beam is projected to weld an object to be welded at a welding portion extended in a belt shape.

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Abstract

La présente invention concerne un dispositif de soudage (100) permettant de projeter une lumière laser sur une section de soudage (3) d'objets à souder (1, 2) qui s'étend sous la forme d'une bande et de souder celle-ci. Le dispositif de soudage est pourvu : d'un premier moyen de projection de laser (104) disposé dans la direction dans laquelle la section de soudage (3) s'étend ; un gabarit transparent (102) afin d'assurer un contact étroit dans la section de soudage (3) des objets en cours de soudage (1, 2) ; et des sections de mise en forme par la lumière (110) pour mettre en forme le faisceau de lumière laser à partir du premier moyen de projection laser (104). Les sections de mise en forme par la lumière (110) sont configurées à partir de lentilles qui dilatent la forme du faisceau de lumière laser dans la direction (direction L) dans laquelle la section de soudage (3) s'étend et adapte la forme du faisceau de lumière laser à la largeur dans la direction de la largeur (direction W).
PCT/JP2015/078341 2014-10-24 2015-10-06 Procédé de soudage et dispositif de soudage WO2016063720A1 (fr)

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EP3388222A1 (fr) * 2017-04-14 2018-10-17 Automotive Lighting Italia S.p.A. Appareil de soudage laser simultané et procédé de soudage laser simultané d'un phare de véhicule
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IT201700041997A1 (it) * 2017-04-14 2018-10-14 Automotive Lighting Italia Spa Attrezzatura di saldatura laser simultanea di un fanale automobilistico e metodo di saldatura laser simultanea di un fanale automobilistico
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IT201700114962A1 (it) * 2017-10-12 2019-04-12 Automotive Lighting Italia Spa Attrezzatura di saldatura laser simultanea di un fanale automobilistico e metodo di saldatura laser simultanea di un fanale automobilistico
EP3470212A1 (fr) * 2017-10-12 2019-04-17 Automotive Lighting Italia S.p.A. Équipement et procédé de soudage laser simultané d'un phare de véhicule
WO2019144011A1 (fr) * 2018-01-22 2019-07-25 Branson Ultrasonics Corporation Guide d'ondes destiné à un soudage de plastique au laser simultané étroit
CN111757804B (zh) * 2018-01-22 2022-09-23 必能信超声公司 用于窄型同步激光塑料焊接的波导
CN111757804A (zh) * 2018-01-22 2020-10-09 必能信超声公司 用于窄型同步激光塑料焊接的波导
US10814560B2 (en) 2018-01-22 2020-10-27 Branson Ultrasonics Corporation Waveguide for narrow simultaneous laser plastics welding
CN111629888A (zh) * 2018-02-05 2020-09-04 易沃斯激光系统股份有限公司 夹紧装置及相关的激光焊接设备
CN111629888B (zh) * 2018-02-05 2022-04-12 易沃斯激光系统股份有限公司 夹紧装置及相关的激光焊接设备
WO2019149938A1 (fr) * 2018-02-05 2019-08-08 Evosys Laser GmbH Dispositif de serrage et dispositif de soudage au laser associée
US11878375B2 (en) 2018-02-05 2024-01-23 Evosys Laser GmbH Clamping device and associated laser welding apparatus

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