WO2016117501A1 - Laser welding method and bonded structure - Google Patents

Laser welding method and bonded structure Download PDF

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Publication number
WO2016117501A1
WO2016117501A1 PCT/JP2016/051275 JP2016051275W WO2016117501A1 WO 2016117501 A1 WO2016117501 A1 WO 2016117501A1 JP 2016051275 W JP2016051275 W JP 2016051275W WO 2016117501 A1 WO2016117501 A1 WO 2016117501A1
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WO
WIPO (PCT)
Prior art keywords
laser
metal member
protrusion
resin member
resin
Prior art date
Application number
PCT/JP2016/051275
Other languages
French (fr)
Japanese (ja)
Inventor
和義 西川
Original Assignee
オムロン株式会社
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Publication date
Application filed by オムロン株式会社 filed Critical オムロン株式会社
Publication of WO2016117501A1 publication Critical patent/WO2016117501A1/en

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    • 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
    • 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
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
    • 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
    • B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
    • B23K26/354—Working by laser beam, e.g. welding, cutting or boring for surface treatment by melting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
    • 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
    • B29C65/44—Joining a heated non plastics element to a plastics element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/82—Testing the joint
    • B29C65/8207—Testing the joint by mechanical methods
    • B29C65/8215—Tensile tests
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
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    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
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    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • 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
    • B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
    • B29C66/3022—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined
    • B29C66/30223—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined said melt initiators being rib-like
    • 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
    • B29C66/43—Joining a relatively small portion of the surface of said 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
    • B29C66/50—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
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—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
    • B29C66/61—Joining from or joining on the inside
    • B29C66/612—Making circumferential 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
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    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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
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    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81266—Optical properties, e.g. transparency, reflectivity
    • B29C66/81267—Transparent to electromagnetic radiation, e.g. to visible light
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
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    • 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
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    • 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
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    • B29C66/23—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations
    • B29C66/232—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations said joint lines being multiple and parallel, i.e. the joint being formed by several parallel joint lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
    • B29C66/7428—Transition metals or their alloys
    • B29C66/74283—Iron or alloys of iron, e.g. steel
    • 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
    • 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
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
    • 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
    • B29C66/939—Measuring or controlling the joining process by measuring or controlling the speed characterised by specific speed values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0079—Liquid crystals

Definitions

  • the present invention relates to a laser welding method and a bonded structure.
  • Patent Documents 1 and 2 Conventionally, laser welding methods and bonded structures are known (see, for example, Patent Documents 1 and 2).
  • Patent Document 1 discloses a method of welding a first resin material and a second resin material by laser light irradiation. Specifically, in the laser welding method described in Patent Document 1, a first resin material that absorbs laser light and a second resin material that is transparent to laser light are stacked. When the two resin materials are welded by melting or joining the two resin materials by passing through the second resin material through the second resin material and irradiating the laser beam to the joint portion to melt the joint portion, scanning of the laser light on the weld line at the joint portion Is performed twice or more.
  • Patent Document 2 discloses a method of welding an absorbent resin material and a transparent resin material by laser light irradiation. Specifically, in the laser welding method described in Patent Document 2, an absorbent resin material having a high absorption rate for laser light and a transparent resin material having a high transmittance for laser light are overlapped. When the joining portion is irradiated with laser light from the side of the transparent resin material to melt and weld the joint portion, a protrusion is provided on the side of the absorbent resin material in contact with the transparent resin material, and both resin materials are The laser beam is irradiated while being pressed by a jig or the like and scanned along the welding line.
  • the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a laser welding method and a bonding structure capable of firmly bonding a metal member and a resin member. It is.
  • the laser welding method includes a step of forming a protrusion in at least one of the metal member and the resin member in the laser welding method of welding a metal member and a resin member with a laser, and the metal member.
  • a plurality of lasers are directed toward the welding region from at least one of the resin member side and the metal member side with respect to the protrusion while applying uniform pressure to the protrusion using a jig.
  • a step of rotating the metal member and the resin member includes a step of forming a protrusion in at least one of the metal member and the resin member in the laser welding method of welding a metal member and a resin member with a laser, and the metal member.
  • the laser welding method may further include a step of correcting a parallelism of the metal member and the resin member facing each other so that pressure is uniformly applied to the protrusion after the step of forming the protrusion. It may be.
  • the laser welding method may further include a step of forming a perforated portion having an opening on the surface of the metal member.
  • the step of forming the perforated portion is a step of forming the perforated portion by irradiating the surface of the metal member with a laser in which one pulse includes a plurality of sub-pulses. Also good.
  • the bonded structure according to the present invention is manufactured by any one of the laser welding methods described above.
  • the metal member and the resin member can be bonded firmly.
  • a bonded structure 100 manufactured using a laser welding method will be described with reference to FIGS.
  • the joining member 100 is manufactured by welding the resin member 10 and the metal member 20 with a laser L (see FIG. 8).
  • the resin member 10 is formed in a cylindrical shape and has a track-like (rounded rectangular) opening 13.
  • a step portion 11 is formed on the inner peripheral surface of the opening 13, and the step portion 11 is formed in an annular shape so as to extend along the inner peripheral surface.
  • the step portion 11 functions as a welding region R where the metal member 20 is welded.
  • the stepped portion 11 is formed with a tapered protrusion 12.
  • a plurality of protrusions 12 may be formed on the step portion 11.
  • the protrusion 12 is formed so as to protrude from the step portion 11 toward the open end side.
  • the protrusion 12 is formed in an annular shape and extends (continuously) along the stepped portion 11. For this reason, the protrusion 12 is formed to extend along the scanning direction S (see FIG. 1) of the laser L.
  • the protrusion 12 has an isosceles trapezoidal cross section, and is formed in a tapered shape so that the width of the distal end is narrower than the width of the proximal end.
  • the protrusion 12 has at least a height of 0.10 mm or more, a lower base of 0.4 mm, and an upper base of 0.03 to 0.05 mm from the viewpoint of gap absorption.
  • the width of the step portion 11 is 0.8 mm.
  • said dimension is an example and can be set arbitrarily.
  • the protrusion 12 does not need to be formed continuously, and may be formed in pieces at arbitrary intervals.
  • the protrusions 12 are provided on both the resin member 10 side and the metal member 20 side, it is preferable that the protrusions 12 arranged on the resin member 10 side and the metal member 20 side do not contact at the top. Further, the protrusion 12 is provided on the scanning track of the laser L for the purpose. However, as long as the purpose of gap absorption is not hindered, the protrusion 12 may be installed over the joints for convenience of component processing.
  • the metal member 20 is formed in a plate shape, and is formed in a track shape so as to be fitted into the opening 13 of the resin member 10.
  • the metal member 20 is fitted into the opening 13 of the resin member 10. Thereby, the resin member 10 and the metal member 20 are overlapped (abutted) so that the metal member 20 contacts the protrusion 12 of the resin member 10.
  • the metal member 20 examples include iron-based metal, stainless-based metal, copper-based metal, aluminum-based metal, magnesium-based metal, and alloys thereof. Moreover, a metal molded body may be sufficient and zinc die casting, aluminum die casting, powder metallurgy, etc. may be sufficient.
  • Resin member 10 is a thermoplastic resin or a thermosetting resin.
  • thermoplastic resins include PVC (polyvinyl chloride), PS (polystyrene), AS (acrylonitrile styrene), ABS (acrylonitrile butadiene styrene), PMMA (polymethyl methacrylate), PE (polyethylene), PP ( Polypropylene), PC (polycarbonate), m-PPE (modified polyphenylene ether), PA6 (polyamide 6), PA66 (polyamide 66), POM (polyacetal), PET (polyethylene terephthalate), PBT (polybutylene terephthalate), PSF (polysulfone) ), PAR (polyarylate), PEI (polyetherimide), PPS (polyphenylene sulfide), PES (polyethersulfone), PEEK (polyetheretherketone), PAI ( Riamidoimido), LCP (liquid crystal polymer), PV
  • TPE thermoplastic elastomer
  • examples of TPE include TPO (olefin-based), TPS (styrene-based), TPEE (ester-based), TPU (urethane-based), TPA (nylon-based), And TPVC (vinyl chloride type) is mentioned.
  • thermosetting resins examples include EP (epoxy), PUR (polyurethane), UF (urea formaldehyde), MF (melamine formaldehyde), PF (phenol formaldehyde), UP (unsaturated polyester), and SI (silicone). Is mentioned. Further, it may be FRP (fiber reinforced plastic).
  • a filler may be added to the above-described thermoplastic resin and thermosetting resin.
  • the filler include inorganic fillers (glass fibers, inorganic salts, etc.), metal fillers, organic fillers, and carbon fibers.
  • the surface 23 of the metal member 20 is previously perforated by laser processing, blast processing, sandpaper processing, anodizing processing, electric discharge processing, etching processing, press processing, or the like. A portion 21 is formed.
  • the perforated part 21 is formed, it is preferable that the perforated part 21 is formed from the viewpoint of improving the bonding property.
  • the perforated portion 21 is a substantially circular non-through hole when seen in a plan view, and a plurality of perforated portions 21 are formed on the surface 23 of the metal member 20.
  • the opening diameter R1 of the surface 23 of the perforated part 21 is preferably 30 ⁇ m or more and 100 ⁇ m or less. This is because when the opening diameter R1 is less than 30 ⁇ m, the filling property of the resin member 10 is deteriorated and the anchor effect may be lowered. On the other hand, when the opening diameter R1 exceeds 100 ⁇ m, the number of the perforated portions 21 per unit area is reduced, and the anchor effect may be lowered.
  • the interval between the perforated parts 21 is preferably 200 ⁇ m or less. This is because if the interval between the perforated portions 21 exceeds 200 ⁇ m, the number of perforated portions 21 per unit area may decrease and the anchor effect may be reduced.
  • the perforated portion 21 has an enlarged diameter portion 211 whose opening diameter increases from the surface 23 side toward the bottom portion 213 in the depth direction (Z direction), and an opening diameter from the surface 23 side toward the bottom portion 213 in the depth direction. Is formed so as to be continuous with the reduced diameter portion 212.
  • the enlarged diameter portion 211 is formed so as to increase in diameter in a curved shape, and the reduced diameter portion 212 is formed so as to reduce in diameter in a curved shape.
  • the enlarged diameter portion 211 is arranged on the surface 23 side, and the reduced diameter portion 212 is arranged on the bottom portion 213 side.
  • the opening diameter (inner diameter) R2 of the boundary part between the enlarged diameter part 211 and the reduced diameter part 212 is the largest, and the opening diameter R1 is smaller than the opening diameter R2.
  • the protrusion 22 is arranged on the surface 23 side of the metal member 20.
  • the protrusion 22 is formed over the entire length in the circumferential direction, and is formed in an annular shape.
  • the protruding portion 22 protruding inwardly on the inner peripheral surface of the perforated portion 21, the protruding portion 22 and the resin member 10 filled in the perforated portion 21 are engaged in the peeling direction (Z direction). By doing so, it is possible to improve the bonding strength in the peeling direction. Thereby, it is possible to improve the bonding strength in the peeling direction in addition to the shearing direction. Furthermore, even if a peeling stress due to a difference in linear expansion coefficient between the metal member 20 and the resin member 10 occurs in a thermal cycle environment, the bonding strength can be maintained. That is, it is possible to improve durability under a heat cycle environment.
  • the perforated part 21 is formed, for example, by being irradiated with a processing laser.
  • a processing laser As the type of laser, a fiber laser, a YAG laser, a YVO 4 laser, a semiconductor laser, a carbon dioxide gas laser, and an excimer laser can be selected from the viewpoint of enabling pulse oscillation, and considering the laser wavelength, a fiber laser, a YAG laser, a YAG Laser second harmonic, YVO 4 laser, and semiconductor laser are preferred.
  • the laser output is set in consideration of the laser irradiation diameter, the type of material of the metal member 20, the shape (for example, thickness) of the metal member 20, and the like.
  • the output upper limit of the laser is preferably 40W. This is because when the laser output exceeds 40 W, the energy is large and it is difficult to form the perforated part 21 having the protruding part 22.
  • a fiber laser marker MX-Z2000 or MX-Z2050 manufactured by OMRON can be given.
  • this fiber laser marker it is possible to irradiate a laser where one pulse is composed of a plurality of subpulses. For this reason, the energy of the laser is easily concentrated in the depth direction, which is suitable for forming the perforated portion 21.
  • the metal member 20 is irradiated with a laser, the metal member 20 is locally melted and the formation of the perforated portion 21 proceeds.
  • the laser is composed of a plurality of sub-pulses, the molten metal member 20 is not easily scattered and easily deposited in the vicinity of the perforated portion 21.
  • the molten metal member 20 is deposited inside the perforated part 21, thereby forming the protruding part 22.
  • the laser irradiation direction is, for example, a direction perpendicular to the surface 23, and the axis of the perforated part 21 is perpendicular to the surface 23.
  • one period of the subpulse is 15 ns or less. This is because when one period of the sub-pulse exceeds 15 ns, energy is easily diffused by heat conduction, and it becomes difficult to form the perforated part 21 having the protruding part 22.
  • one cycle of the subpulse is a total time of the irradiation time for one subpulse and the interval from the end of the irradiation of the subpulse to the start of the irradiation of the next subpulse.
  • the number of subpulses of one pulse is preferably 2 or more and 50 or less. This is because if the number of subpulses exceeds 50, the output per unit of subpulses becomes small, and it becomes difficult to form the perforated part 21 having the protruding parts 22.
  • a correction mechanism for parallelism between the metal member 20 and the resin member 10 facing each other may be provided.
  • the parallelism correction mechanism By providing the parallelism correction mechanism, the joint surfaces of the metal member 20 and the resin member 10 are uniformly opposed, and the protrusion 12 isotropically deforms and sinks during laser irradiation. The effect can be enhanced.
  • a method using a pressure measurement sheet or a method using silicone rubber can be selected in a timely manner.
  • the color changes when pressure is applied, and the hue varies depending on the magnitude of the pressure.
  • the pressure measurement sheet is sandwiched between pressing glass 50 as a pressing plate installed in a jig.
  • the holding glass 50 is installed in contact with the metal member 20 or the resin member 10. Pressure is applied to the pressure measurement sheet through the holding glass 50, and the parallelism of the jig is corrected so that the color of the pressure measurement sheet is uniform.
  • the resin member 10 is held by a jig (not shown), and the jig holding the resin member 10 is pressurized by a pressurizing device (not shown).
  • the pressurizing device is, for example, an air cylinder or a spring.
  • the holding glass 50 is configured to be able to transmit the laser L.
  • correction is performed so that the contact pressure between the protrusion 12 of the resin member 10 and the metal member 20 becomes equal.
  • a pressure measurement sheet see FIGS. 6 and 7
  • the protrusion 12 of the resin member 10 and the metal member 20 are Measure the contact pressure.
  • a shim spacer
  • the laser L is irradiated from the optical head 60 in a state where the direction of the resin member 10 is adjusted and pressurized. That is, the laser L is irradiated in a state where the contact pressure between the protrusion 12 of the resin member 10 and the metal member 20 is equalized.
  • the laser L is irradiated from the metal member 20 side toward the welding region R of the resin member 10, and is scanned a plurality of times along the scanning direction S (see FIG. 1). For this reason, the metal member 20 of the part corresponding to the welding area
  • the optical head 60 repeatedly irradiates the welding region R with the laser L while moving along the scanning direction S above the welding region R a plurality of times.
  • the oscillator of the laser L is, for example, a semiconductor laser having a wavelength of 808 nm.
  • a support plate 52 installed in a jig and a holding glass 50 installed in the jig and in contact with the resin member 10 or the metal member 20. Then, the silicone rubber 51 sandwiched between the support plate 52 and the pressing glass 50 absorbs parallelism using the elasticity of the silicone rubber 51, and the pressure distribution is made uniform.
  • the contact pressure is made uniform. Also good.
  • the pressing glass 50 is attached to the support plate 52 via the silicone rubber 51.
  • the silicone rubber 51 can be elastically deformed.
  • the support plate 52 can transmit the laser L and is fixed at a predetermined position.
  • the silicone rubber 51 expands and contracts, so that the holding glass 50 is inclined according to the inclination of the resin member 10 and the metal member 20. It is like that. Therefore, the resin member 10 is perpendicular to the presser glass 50, that is, the presser glass 50 and the metal member 20 are parallel, and the contact pressure between the protrusion 12 of the resin member 10 and the metal member 20 is made equal. be able to.
  • the contact pressure can be equalized. Is possible.
  • the resin member 10 is bonded to the surface 23 of the metal member 20 in which the perforated portion 21 is formed.
  • the resin member 10 is bonded to the metal member 20 by, for example, laser bonding. Thereby, the resin member 10 is solidified in a state in which the perforated portion 21 of the metal member 20 is filled.
  • Such a bonded structure 100 is applicable, for example, when a metal cover (not shown) is bonded to a resin case (not shown) of a photoelectric sensor.
  • the resin case corresponds to the resin member 10
  • the metal cover corresponds to the metal member 20.
  • the metal member 20 and the resin member 10 are pressed with a jig or the like and brought into surface contact, and then laser irradiation is performed.
  • Laser irradiation is performed from the resin member 10 side (only when having laser transparency) and / or the metal member 20 side.
  • the laser is scanned a plurality of times on the installation of the protrusion 12. Thereby, even when the metal member 20 and / or the resin member 10 with low surface accuracy are used, the gap between the materials can be absorbed by deformation and sinking, and the laser energy absorbed on the metal member 20 side can be efficiently absorbed.
  • a strong bonded structure 100 of the metal member 20 and the resin member 10 is obtained.
  • fiber laser, YAG laser, YVO 4 laser, a semiconductor laser, a carbon dioxide laser, or excimer laser can be selected.
  • Example conditions for laser irradiation are as follows.
  • the same locus is scanned a plurality of times.
  • the deformation and sinking amount of the protrusion 12 are increased, so that a desired gap absorption can be realized.
  • the reason is that when the number of scans is one, deformation of the protrusion 12 and the amount of sinking are small, so that it is not possible to achieve a desired gap absorption.
  • the cross-sectional shape of the protrusion 12a of the joint structure 101 according to the first modification may be a rectangular shape.
  • the cross-sectional shape of the protrusion 12b of the joint structure 102 according to the second modification may be triangular.
  • the cross-sectional shape of the protrusion 12c of the joint structure 103 according to the third modification may be a semicircular shape.
  • the cross-sectional shape of the protrusion 12 d of the joint structure 104 according to the fourth modified example projects so as to taper from the resin member 10 toward the metal member 20 and has a semicircular tip. There may be. Also, as shown in FIG.
  • the cross-sectional shape of the protrusion 12e of the joint structure 105 according to the fifth modified example protrudes from the resin member 10 toward the metal member 20 with the same width and the tip is semicircular. May be.
  • the protrusion 24 may be formed on the metal member 20, and the protrusion may not be formed on the resin member 10.
  • the protrusion 24 may be formed on the metal member 20 and the protrusion 12 may be formed on the resin member 10.
  • the bonded structures 500 of Examples 1 to 4 are formed in a plate shape, and the metal member 501 (see FIG. 11) is SUS304, the length is 100 mm, the width is 29 mm, and the thickness is 3 mm. It is.
  • the resin member 502 (see FIG. 11) is PMMA resin, has a length of 100 mm, a width of 25 mm, and a thickness of 3 mm.
  • the joint strength was evaluated using an Instron electromechanical universal testing machine 5900. Specifically, the test was conducted at a tensile speed of 5 mm / min in the shear direction, and a bonded structure having no protrusion 12 formed as a reference (comparative example) passed (+ ). Moreover, it evaluated that it was a rejection (x) that the joint strength less than a reference
  • a protrusion was provided on the resin member 502, the height of the protrusion was set to 0.10 mm, and the number of times of laser scanning was set to a plurality of times (three times). As a result, the bonding strength was 16.7 Mpa.
  • the bonding strength was 17.1 Mpa.
  • a protrusion was provided on the metal member 501, the height of the protrusion was 0.10 mm, and the number of times of laser scanning was set to a plurality of times (three times). As a result, the bonding strength was 15.7 Mpa.
  • protrusions are provided on both the metal member 501 and the resin member 502, the height of each protrusion is 0.10 mm, and the number of times of laser scanning is three (3). It was. As a result, the bonding strength was 17.2 Mpa.
  • the protrusions are formed on at least one of the metal member 501 and the resin member 502, so that the protrusions are not formed (Comparative Example 1).
  • the bonding strength was high.
  • the protrusions were installed on both the metal member and the resin member, the height of the protrusion was 0.10 mm, and the number of times of laser scanning was one. As a result, the bonding strength was 7.0 Mpa.
  • Comparative Examples 2 to 4 are compared with the case where the number of times of laser scanning in Comparative Example 1 and Examples 1 to 4 is set to a plurality of times (three times) by setting the number of times of laser scanning to one.
  • the bonding strength was low. In other words, it has been found that the bonding strength is improved by setting the number of times of laser scanning to a plurality of times.
  • the effects listed below can be obtained. That is, in this embodiment, as described above, even when the metal member 20 and / or the resin member 10 with low surface accuracy is used, the gap between the materials due to the deformation and sinking of the protrusion 12 can be absorbed. At the same time, by increasing the contact area between the metal member 20 and the resin member 10, the laser energy absorbed on the metal member 20 side can be efficiently transferred to the resin member 10 side (the amount of heat conduction increases). Therefore, the metal member 20 and the resin member 10 can be firmly joined.
  • a tapered shape or the like is shown as an example of the shape of the protrusion, but the present invention is not limited to this. In the present invention, any shape may be used as long as it protrudes from the surface of at least one of the metal member and the resin member.
  • a method using a pressure measurement sheet or silicone rubber is shown as an example of a method for correcting parallelism, but the present invention is not limited to this.
  • a member other than the pressure measurement sheet or silicone rubber can be used as a method for correcting the parallelism.
  • the cross-sectional shape of the perforated part may be rectangular or semicircular.
  • the perforated part may have a groove shape that continuously extends in a plan view, or may be formed at a predetermined interval.
  • the present invention can be used for a laser welding method and a bonded structure.

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

Abstract

A laser welding method whereby a metal member and a resin member are welded using a laser, comprising: a step in which a protruding section is formed in a welding area in at least either the metal member or the resin member; and a step in which pressure is applied uniformly to the protruding section by a jig, a laser is scanned multiple times across the protruding section from at least either the resin member side or the metal member side towards the welding area, and the metal member and the resin member are bonded.

Description

レーザ溶着方法および接合構造体Laser welding method and bonded structure
　本発明は、レーザ溶着方法および接合構造体に関する。 The present invention relates to a laser welding method and a bonded structure.
　従来、レーザ溶着方法および接合構造体が知られている（たとえば、特許文献１および２参照）。 Conventionally, laser welding methods and bonded structures are known (see, for example, Patent Documents 1 and 2).
　上記特許文献１には、第１の樹脂材と第２の樹脂材とをレーザ光の照射により溶着する方法が開示されている。具体的には、上記特許文献１に記載のレーザ溶着方法では、レーザ光に対して吸収性のある第１の樹脂材と、レーザ光に対して透過性のある第２の樹脂材とを重ね合わせ又は突き合わせて、その接合部に第２の樹脂材を透過してレーザ光を照射して接合部を溶融して両樹脂材を溶着するに際して、この接合部での溶着線上におけるレーザ光の走査を２回以上行われる。 Patent Document 1 discloses a method of welding a first resin material and a second resin material by laser light irradiation. Specifically, in the laser welding method described in Patent Document 1, a first resin material that absorbs laser light and a second resin material that is transparent to laser light are stacked. When the two resin materials are welded by melting or joining the two resin materials by passing through the second resin material through the second resin material and irradiating the laser beam to the joint portion to melt the joint portion, scanning of the laser light on the weld line at the joint portion Is performed twice or more.
　上記特許文献２には、吸収性樹脂材と透過性樹脂材とをレーザ光の照射により溶着する方法が開示されている。具体的には、上記特許文献２に記載のレーザ溶着方法では、レーザ光に対して吸収率が高い吸収性樹脂材と、レーザ光に対して透過率の高い透過性樹脂材とを重ね合わせて、その接合部に透過性樹脂材側からレーザ光を照射して接合部を溶融して溶着するに際して、吸収性樹脂材の透過性樹脂材と接する側に突条を設けると共に、両樹脂材を治具等により加圧した状態でレーザ光を照射して溶着線に沿って走査される。 Patent Document 2 discloses a method of welding an absorbent resin material and a transparent resin material by laser light irradiation. Specifically, in the laser welding method described in Patent Document 2, an absorbent resin material having a high absorption rate for laser light and a transparent resin material having a high transmittance for laser light are overlapped. When the joining portion is irradiated with laser light from the side of the transparent resin material to melt and weld the joint portion, a protrusion is provided on the side of the absorbent resin material in contact with the transparent resin material, and both resin materials are The laser beam is irradiated while being pressed by a jig or the like and scanned along the welding line.
特開２００５－２４６６９２号公報JP 2005-246692 A 特開２００８－３０２７００号公報JP 2008-302700 A
　しかしながら、上記特許文献１に記載のレーザ溶着方法において、レーザ接合面が平面である場合、レーザ照射時に部材間の隙間吸収効果が十分でなく、接合できている箇所と、接合できていない箇所が存在してしまう。これは、隙間吸収のばらつきが圧力の印加のばらつきを起こし、そのため、樹脂同士の拡散接合層の厚みが小さい部位ができるためである。また、材料の加圧分布が不均一な状態でレーザ接合すると、加圧力が大きい部分が局所的に変形、沈み込むため、隙間吸収効果が低く、十分な接合強度が得られない。これらのため、金属部材と樹脂部材とを強固に接合することが困難であるという問題点がある。 However, in the laser welding method described in Patent Document 1, when the laser bonding surface is a flat surface, the gap absorption effect between the members is not sufficient at the time of laser irradiation, and there are a portion where bonding is possible and a portion where bonding is not possible. It will exist. This is because variation in gap absorption causes variation in pressure application, and therefore, a portion where the thickness of the diffusion bonding layer between the resins is small is formed. Further, when laser bonding is performed in a state where the pressure distribution of the material is not uniform, a portion where the applied pressure is large is locally deformed and sinks, so that the gap absorption effect is low and sufficient bonding strength cannot be obtained. For these reasons, there is a problem that it is difficult to firmly join the metal member and the resin member.
　また、上記特許文献２に記載のレーザ溶着方法では、突部に複数回繰返しレーザ走査していないため、突部の変形、沈み込みによる、部材間の隙間吸収効果が低く、十分な接合強度が得られない。また、材料の加圧分布が不均一な状態でレーザ接合すると、加圧力が大きい部分が局所的に変形、沈み込むため、隙間吸収効果が低く、十分な接合強度が得られない。これらのため、金属部材と樹脂部材とを強固に接合することが困難であるという問題点がある。 Further, in the laser welding method described in Patent Document 2, since the protrusion is not repeatedly scanned with the laser several times, the effect of absorbing the gap between the members due to deformation and sinking of the protrusion is low, and sufficient bonding strength is obtained. I can't get it. Further, when laser bonding is performed in a state where the pressure distribution of the material is not uniform, a portion where the applied pressure is large is locally deformed and sinks, so that the gap absorption effect is low and sufficient bonding strength cannot be obtained. For these reasons, there is a problem that it is difficult to firmly join the metal member and the resin member.
　本発明は、上記の課題を解決するためになされたものであり、本発明の目的は、金属部材と樹脂部材とを強固に接合することが可能なレーザ溶着方法および接合構造体を提供することである。 The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a laser welding method and a bonding structure capable of firmly bonding a metal member and a resin member. It is.
　本発明によるレーザ溶着方法は、金属部材と樹脂部材とをレーザで溶着するレーザ溶着方法において、前記金属部材および前記樹脂部材のうち少なくとも一方の溶着領域に突部を形成する工程と、前記金属部材と前記樹脂部材とを治具により、前記突部へ均一に圧力を加えながら、前記突部に対して、前記樹脂部材側および前記金属部材側のうち少なくとも一方から溶着領域に向けてレーザを複数回走査して、前記金属部材と前記樹脂部材とを接合する工程とを備える。 The laser welding method according to the present invention includes a step of forming a protrusion in at least one of the metal member and the resin member in the laser welding method of welding a metal member and a resin member with a laser, and the metal member. A plurality of lasers are directed toward the welding region from at least one of the resin member side and the metal member side with respect to the protrusion while applying uniform pressure to the protrusion using a jig. And a step of rotating the metal member and the resin member.
　また、上記レーザ溶着方法において、前記突部を形成する工程の後に、前記突部に圧力が均一に加わるように、前記金属部材と前記樹脂部材との対面する平行度を補正する工程をさらに備えていてもよい。 The laser welding method may further include a step of correcting a parallelism of the metal member and the resin member facing each other so that pressure is uniformly applied to the protrusion after the step of forming the protrusion. It may be.
　また、上記レーザ溶着方法において、前記金属部材の表面に開口を有する穿孔部を形成する工程をさらに備えていてもよい。 The laser welding method may further include a step of forming a perforated portion having an opening on the surface of the metal member.
　また、上記レーザ溶着方法において、前記穿孔部を形成する工程は、１パルスが複数のサブパルスで構成されるレーザを前記金属部材の表面に照射することにより、前記穿孔部を形成する工程であってもよい。 In the laser welding method, the step of forming the perforated portion is a step of forming the perforated portion by irradiating the surface of the metal member with a laser in which one pulse includes a plurality of sub-pulses. Also good.
　本発明による接合構造体は、上記したいずれか１つのレーザ溶着方法によって製造されている。 The bonded structure according to the present invention is manufactured by any one of the laser welding methods described above.
　本発明のレーザ溶着方法および接合構造体によれば、金属部材と樹脂部材とを強固に接合することができる。 According to the laser welding method and the bonded structure of the present invention, the metal member and the resin member can be bonded firmly.
本発明の一実施形態によるレーザ溶着方法によって溶着される金属部材および樹脂部材を示す斜視図である。It is a perspective view which shows the metal member and resin member which are welded by the laser welding method by one Embodiment of this invention. 金属部材および樹脂部材の突部を示す断面図である。It is sectional drawing which shows the protrusion part of a metal member and a resin member. 接合構造体の断面の模式図である。It is a schematic diagram of the cross section of a joining structure. 接合構造体の金属部材に穿孔部が形成された状態を示す模式図である。It is a schematic diagram which shows the state by which the perforated part was formed in the metal member of a joining structure. 押さえガラスに対して樹脂部材が傾いている状態を示す模式図である。It is a schematic diagram which shows the state in which the resin member inclines with respect to pressing glass. 平行度が適正の場合を示す圧力測定シートの模式図である。It is a schematic diagram of the pressure measurement sheet | seat which shows the case where parallelism is appropriate. 平行度が不適正の場合を示す圧力測定シートの模式図である。It is a schematic diagram of a pressure measurement sheet showing a case where the parallelism is inappropriate. 押さえガラスに対して樹脂部材の向きが調整された状態を示す模式図である。It is a schematic diagram which shows the state in which the direction of the resin member was adjusted with respect to the pressing glass. 金属部材および樹脂部材が溶着された状態を示す模式図である。It is a schematic diagram which shows the state by which the metal member and the resin member were welded. シリコーンゴムを用いたレーザ溶着方法を説明するための模式図である。It is a schematic diagram for demonstrating the laser welding method using a silicone rubber. 実施例の接合構造体を示す斜視図である。It is a perspective view which shows the joining structure body of an Example. 第１変形例による金属部材および樹脂部材の突部を示す断面図である。It is sectional drawing which shows the protrusion of the metal member and resin member by a 1st modification. 第２変形例による金属部材および樹脂部材の突部を示す断面図である。It is sectional drawing which shows the protrusion of the metal member and resin member by a 2nd modification. 第３変形例による金属部材および樹脂部材の突部を示す断面図である。It is sectional drawing which shows the protrusion of the metal member and resin member by a 3rd modification. 第４変形例による金属部材および樹脂部材の突部を示す断面図である。It is sectional drawing which shows the protrusion of the metal member and resin member by a 4th modification. 第５変形例による金属部材および樹脂部材の突部を示す断面図である。It is sectional drawing which shows the protrusion of the metal member and resin member by a 5th modification. 第６変形例による樹脂部材および金属部材の突部を示す断面図である。It is sectional drawing which shows the protrusion of the resin member and metal member by a 6th modification. 第７変形例による金属部材の突部および樹脂部材の突部を示す断面図である。It is sectional drawing which shows the protrusion of a metal member and the protrusion of a resin member by a 7th modification.
　以下、本発明の実施形態について図面を参照して説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
　－全体構成－
　まず、図１～図１０を参照して、本発明の一実施形態によるレーザ溶着方法を用いて製造された接合構造体１００について説明する。このレーザ溶着方法では、樹脂部材１０と、金属部材２０とがレーザＬ（図８参照）により溶着されることにより、接合構造体１００が製造される。 -overall structure-
First, a bonded structure 100 manufactured using a laser welding method according to an embodiment of the present invention will be described with reference to FIGS. In this laser welding method, the joining member 100 is manufactured by welding the resin member 10 and the metal member 20 with a laser L (see FIG. 8).
　樹脂部材１０は、図１に示すように、筒状に形成されており、トラック状（角丸長方形状）の開口部１３を有する。開口部１３の内周面には段差部１１が形成され、その段差部１１は内周面に沿って延びるように環状に形成されている。 As shown in FIG. 1, the resin member 10 is formed in a cylindrical shape and has a track-like (rounded rectangular) opening 13. A step portion 11 is formed on the inner peripheral surface of the opening 13, and the step portion 11 is formed in an annular shape so as to extend along the inner peripheral surface.
　段差部１１は、金属部材２０が溶着される溶着領域Ｒとして機能する。この段差部１１には、図１および図２に示すように、テーパ状の突部１２が形成されている。なお、突部１２は、段差部１１に複数形成されていてもよい。また、突部１２は、段差部１１から開放端側に向けて突出するように形成されている。突部１２は、環状に形成されるとともに、段差部１１に沿って延びるように（連続的に）形成されている。このため、突部１２は、レーザＬの走査方向Ｓ（図１参照）に沿って延びるように形成されている。また、突部１２は、断面が等脚台形状に形成されており、先端の幅が基端の幅に比べて狭くなるように先窄まり状に形成されている。 The step portion 11 functions as a welding region R where the metal member 20 is welded. As shown in FIGS. 1 and 2, the stepped portion 11 is formed with a tapered protrusion 12. Note that a plurality of protrusions 12 may be formed on the step portion 11. The protrusion 12 is formed so as to protrude from the step portion 11 toward the open end side. The protrusion 12 is formed in an annular shape and extends (continuously) along the stepped portion 11. For this reason, the protrusion 12 is formed to extend along the scanning direction S (see FIG. 1) of the laser L. Further, the protrusion 12 has an isosceles trapezoidal cross section, and is formed in a tapered shape so that the width of the distal end is narrower than the width of the proximal end.
　具体例としては、突部１２は、隙間吸収の観点から、少なくとも、高さが０．１０ｍｍ以上であり、下底が０．４ｍｍであり、上底が０．０３～０．０５ｍｍである。また、段差部１１の幅は０．８ｍｍである。なお、上記の寸法は、一例であり、任意に設定可能である。なお、突部１２は連続的に形成されている必要はなく、任意の間隔で断片的に形成されていてもよい。 As a specific example, the protrusion 12 has at least a height of 0.10 mm or more, a lower base of 0.4 mm, and an upper base of 0.03 to 0.05 mm from the viewpoint of gap absorption. The width of the step portion 11 is 0.8 mm. In addition, said dimension is an example and can be set arbitrarily. In addition, the protrusion 12 does not need to be formed continuously, and may be formed in pieces at arbitrary intervals.
　また、樹脂部材１０側と金属部材２０側の両方に突部１２を設ける場合は、樹脂部材１０側および金属部材２０側に配した突部１２が頂上部で接触しないことが好ましい。また、突部１２は、その目的からレーザＬの走査軌道上に設けられている。ただし、隙間吸収の目的を阻害しない範囲において、部品加工の都合から接合部以外に渡って突部１２を設置しても構わない。 Further, when the protrusions 12 are provided on both the resin member 10 side and the metal member 20 side, it is preferable that the protrusions 12 arranged on the resin member 10 side and the metal member 20 side do not contact at the top. Further, the protrusion 12 is provided on the scanning track of the laser L for the purpose. However, as long as the purpose of gap absorption is not hindered, the protrusion 12 may be installed over the joints for convenience of component processing.
　金属部材２０は、図１に示すように、板状に形成されており、樹脂部材１０の開口部１３に嵌合可能なようにトラック状に形成されている。 As shown in FIG. 1, the metal member 20 is formed in a plate shape, and is formed in a track shape so as to be fitted into the opening 13 of the resin member 10.
　そして、樹脂部材１０の開口部１３に金属部材２０が嵌め合わされる。これにより、樹脂部材１０の突部１２に対して金属部材２０が接触するように、樹脂部材１０と金属部材２０とが重ね合わされる（突き合わされる）。 Then, the metal member 20 is fitted into the opening 13 of the resin member 10. Thereby, the resin member 10 and the metal member 20 are overlapped (abutted) so that the metal member 20 contacts the protrusion 12 of the resin member 10.
　－材料－
　金属部材２０の一例としては、鉄系金属、ステンレス系金属、銅系金属、アルミ系金属、マグネシウム系金属、および、それらの合金が挙げられる。また、金属成形体であってもよく、亜鉛ダイカスト、アルミダイカスト、粉末冶金などであってもよい。 -material-
Examples of the metal member 20 include iron-based metal, stainless-based metal, copper-based metal, aluminum-based metal, magnesium-based metal, and alloys thereof. Moreover, a metal molded body may be sufficient and zinc die casting, aluminum die casting, powder metallurgy, etc. may be sufficient.
　樹脂部材１０は、熱可塑性樹脂、または、熱硬化性樹脂である。熱可塑性樹脂の一例としては、ＰＶＣ（ポリ塩化ビニル）、ＰＳ（ポリスチレン）、ＡＳ（アクリロニトリル・スチレン）、ＡＢＳ（アクリロニトリル・ブタジエン・スチレン）、ＰＭＭＡ（ポリメチルメタクリレート）、ＰＥ（ポリエチレン）、ＰＰ（ポリプロピレン）、ＰＣ（ポリカーボネート）、ｍ－ＰＰＥ（変性ポリフェニレンエーテル）、ＰＡ６（ポリアミド６）、ＰＡ６６（ポリアミド６６）、ＰＯＭ（ポリアセタール）、ＰＥＴ（ポリエチレンテレフタレート）、ＰＢＴ（ポリブチレンテレフタレート）、ＰＳＦ（ポリサルホン）、ＰＡＲ（ポリアリレート）、ＰＥＩ（ポリエーテルイミド）、ＰＰＳ（ポリフェニレンサルファイド）、ＰＥＳ（ポリエーテルサルホン）、ＰＥＥＫ（ポリエーテルエーテルケトン）、ＰＡＩ（ポリアミドイミド）、ＬＣＰ（液晶ポリマー）、ＰＶＤＣ（ポリ塩化ビニリデン）、ＰＴＦＥ（ポリテトラフルオロエチレン）、ＰＣＴＦＥ（ポリクロロトリフルオロエチレン）、および、ＰＶＤＦ（ポリフッ化ビニリデン）が挙げられる。また、ＴＰＥ（熱可塑性エラストマ）であってもよく、ＴＰＥの一例としては、ＴＰＯ（オレフィン系）、ＴＰＳ（スチレン系）、ＴＰＥＥ（エステル系）、ＴＰＵ（ウレタン系）、ＴＰＡ（ナイロン系）、および、ＴＰＶＣ（塩化ビニル系）が挙げられる。 Resin member 10 is a thermoplastic resin or a thermosetting resin. Examples of thermoplastic resins include PVC (polyvinyl chloride), PS (polystyrene), AS (acrylonitrile styrene), ABS (acrylonitrile butadiene styrene), PMMA (polymethyl methacrylate), PE (polyethylene), PP ( Polypropylene), PC (polycarbonate), m-PPE (modified polyphenylene ether), PA6 (polyamide 6), PA66 (polyamide 66), POM (polyacetal), PET (polyethylene terephthalate), PBT (polybutylene terephthalate), PSF (polysulfone) ), PAR (polyarylate), PEI (polyetherimide), PPS (polyphenylene sulfide), PES (polyethersulfone), PEEK (polyetheretherketone), PAI ( Riamidoimido), LCP (liquid crystal polymer), PVDC (polyvinylidene chloride), PTFE (polytetrafluoroethylene), PCTFE (polychlorotrifluoroethylene), and include PVDF (poly (vinylidene fluoride)) it is. TPE (thermoplastic elastomer) may also be used, and examples of TPE include TPO (olefin-based), TPS (styrene-based), TPEE (ester-based), TPU (urethane-based), TPA (nylon-based), And TPVC (vinyl chloride type) is mentioned.
　熱硬化性樹脂の一例としては、ＥＰ（エポキシ）、ＰＵＲ（ポリウレタン）、ＵＦ（ユリアホルムアルデヒド）、ＭＦ（メラミンホルムアルデヒド）、ＰＦ（フェノールホルムアルデヒド）、ＵＰ（不飽和ポリエステル）、および、ＳＩ（シリコーン）が挙げられる。また、ＦＲＰ（繊維強化プラスチック）であってもよい。 Examples of thermosetting resins include EP (epoxy), PUR (polyurethane), UF (urea formaldehyde), MF (melamine formaldehyde), PF (phenol formaldehyde), UP (unsaturated polyester), and SI (silicone). Is mentioned. Further, it may be FRP (fiber reinforced plastic).
　なお、上記した熱可塑性樹脂および熱硬化性樹脂には、充填剤が添加されていてもよい。充填剤の一例としては、無機系充填剤（ガラス繊維、無機塩類など）、金属系充填剤、有機系充填剤、および、炭素繊維などが挙げられる。 In addition, a filler may be added to the above-described thermoplastic resin and thermosetting resin. Examples of the filler include inorganic fillers (glass fibers, inorganic salts, etc.), metal fillers, organic fillers, and carbon fibers.
　－穿孔部－
　図３および図４に示すように、金属部材２０の表面２３には、予めレーザ加工処理、ブラスト処理、サンドペーパ処理、陽極酸化処理、放電加工処理、エッチング処理、または、プレス加工処理などにより、穿孔部２１が形成されている。 -Perforated part-
As shown in FIGS. 3 and 4, the surface 23 of the metal member 20 is previously perforated by laser processing, blast processing, sandpaper processing, anodizing processing, electric discharge processing, etching processing, press processing, or the like. A portion 21 is formed.
　なお、穿孔部２１が形成されることは必須ではないが、接合性の向上の観点からは穿孔部２１が形成されている方が好ましい。 In addition, although it is not essential that the perforated part 21 is formed, it is preferable that the perforated part 21 is formed from the viewpoint of improving the bonding property.
　穿孔部２１は、平面的に見てほぼ円形の非貫通孔であり、金属部材２０の表面２３に複数形成されている。穿孔部２１の表面２３の開口径Ｒ１は、３０μｍ以上、１００μｍ以下が好ましい。これは、開口径Ｒ１が３０μｍを下回ると、樹脂部材１０の充填性が悪化してアンカー効果が低下する場合があるためである。一方、開口径Ｒ１が１００μｍを上回ると、単位面積あたりの穿孔部２１の数が減少してアンカー効果が低下する場合があるためである。 The perforated portion 21 is a substantially circular non-through hole when seen in a plan view, and a plurality of perforated portions 21 are formed on the surface 23 of the metal member 20. The opening diameter R1 of the surface 23 of the perforated part 21 is preferably 30 μm or more and 100 μm or less. This is because when the opening diameter R1 is less than 30 μm, the filling property of the resin member 10 is deteriorated and the anchor effect may be lowered. On the other hand, when the opening diameter R1 exceeds 100 μm, the number of the perforated portions 21 per unit area is reduced, and the anchor effect may be lowered.
　また、穿孔部２１の間隔（所定の穿孔部２１の中心と、所定の穿孔部２１と隣接する穿孔部２１の中心との距離）は、２００μｍ以下であることが好ましい。これは、穿孔部２１の間隔が２００μｍを上回ると、単位面積あたりの穿孔部２１の数が減少してアンカー効果が低下する場合があるためである。 Further, the interval between the perforated parts 21 (the distance between the center of the predetermined perforated part 21 and the center of the perforated part 21 adjacent to the predetermined perforated part 21) is preferably 200 μm or less. This is because if the interval between the perforated portions 21 exceeds 200 μm, the number of perforated portions 21 per unit area may decrease and the anchor effect may be reduced.
　また、穿孔部２１は、深さ方向（Ｚ方向）において表面２３側から底部２１３に向けて開口径が大きくなる拡径部２１１と、深さ方向において表面２３側から底部２１３に向けて開口径が小さくなる縮径部２１２とが連なるように形成されている。拡径部２１１は、曲線状に拡径するように形成され、縮径部２１２は、曲線状に縮径するように形成されている。 The perforated portion 21 has an enlarged diameter portion 211 whose opening diameter increases from the surface 23 side toward the bottom portion 213 in the depth direction (Z direction), and an opening diameter from the surface 23 side toward the bottom portion 213 in the depth direction. Is formed so as to be continuous with the reduced diameter portion 212. The enlarged diameter portion 211 is formed so as to increase in diameter in a curved shape, and the reduced diameter portion 212 is formed so as to reduce in diameter in a curved shape.
　そして、拡径部２１１が表面２３側に配置されるとともに、縮径部２１２が底部２１３側に配置されている。このため、穿孔部２１において、拡径部２１１と縮径部２１２との境界部分の開口径（内径）Ｒ２が最も大きくなっており、開口径Ｒ１が開口径Ｒ２よりも小さくなっている。これにより、突出部２２が金属部材２０の表面２３側に配置されている。この突出部２２は、たとえば、周方向における全長にわたって形成されており、環状に形成されている。 And the enlarged diameter portion 211 is arranged on the surface 23 side, and the reduced diameter portion 212 is arranged on the bottom portion 213 side. For this reason, in the perforated part 21, the opening diameter (inner diameter) R2 of the boundary part between the enlarged diameter part 211 and the reduced diameter part 212 is the largest, and the opening diameter R1 is smaller than the opening diameter R2. Thereby, the protrusion 22 is arranged on the surface 23 side of the metal member 20. For example, the protrusion 22 is formed over the entire length in the circumferential direction, and is formed in an annular shape.
　このように、穿孔部２１の内周面に内側に突出する突出部２２を形成することによって、突出部２２と穿孔部２１に充填された樹脂部材１０とが剥離方向（Ｚ方向）において係合されることにより、剥離方向の接合強度の向上を図ることができる。これにより、せん断方向に加えて剥離方向についても接合強度の向上を図ることができる。さらに、熱サイクル環境下において、金属部材２０および樹脂部材１０の線膨張係数差に起因する剥離応力が発生しても、接合強度を維持することができる。すなわち、熱サイクル環境下における耐久性の向上を図ることができる。 Thus, by forming the protruding portion 22 protruding inwardly on the inner peripheral surface of the perforated portion 21, the protruding portion 22 and the resin member 10 filled in the perforated portion 21 are engaged in the peeling direction (Z direction). By doing so, it is possible to improve the bonding strength in the peeling direction. Thereby, it is possible to improve the bonding strength in the peeling direction in addition to the shearing direction. Furthermore, even if a peeling stress due to a difference in linear expansion coefficient between the metal member 20 and the resin member 10 occurs in a thermal cycle environment, the bonding strength can be maintained. That is, it is possible to improve durability under a heat cycle environment.
　この穿孔部２１は、たとえば、加工用のレーザが照射されることによって形成される。レーザの種類としては、パルス発振が可能な観点から、ファイバレーザ、ＹＡＧレーザ、ＹＶＯ4レーザ、半導体レーザ、炭酸ガスレーザ、エキシマレーザが選択でき、レーザの波長を考慮すると、ファイバレーザ、ＹＡＧレーザ、ＹＡＧレーザの第２高調波、ＹＶＯ4レーザ、半導体レーザが好ましい。なお、レーザの出力は、レーザの照射径、金属部材２０の材料の種類、金属部材２０の形状（たとえば厚み）などを考慮して設定される。たとえば、レーザの出力上限は４０Ｗが好ましい。これは、レーザの出力が４０Ｗを超えると、エネルギが大きく、突出部２２を有する穿孔部２１を形成することが困難であるためである。 The perforated part 21 is formed, for example, by being irradiated with a processing laser. As the type of laser, a fiber laser, a YAG laser, a YVO 4 laser, a semiconductor laser, a carbon dioxide gas laser, and an excimer laser can be selected from the viewpoint of enabling pulse oscillation, and considering the laser wavelength, a fiber laser, a YAG laser, a YAG Laser second harmonic, YVO 4 laser, and semiconductor laser are preferred. The laser output is set in consideration of the laser irradiation diameter, the type of material of the metal member 20, the shape (for example, thickness) of the metal member 20, and the like. For example, the output upper limit of the laser is preferably 40W. This is because when the laser output exceeds 40 W, the energy is large and it is difficult to form the perforated part 21 having the protruding part 22.
　穿孔部２１を形成する装置の一例としては、オムロン製のファイバレーザマーカＭＸ－Ｚ２０００またはＭＸ－Ｚ２０５０を挙げることができる。このファイバレーザマーカでは、１パルスが複数のサブパルスで構成されるレーザを照射することが可能である。このため、レーザのエネルギを深さ方向に集中させやすいので、穿孔部２１を形成するのに好適である。具体的には、金属部材２０にレーザが照射されると、金属部材２０が局部的に溶融されることにより穿孔部２１の形成が進行する。このとき、レーザが複数のサブパルスで構成されているため、溶融された金属部材２０が飛散されにくく、穿孔部２１の近傍に堆積されやすい。そして、穿孔部２１の形成が進行すると、溶融された金属部材２０が穿孔部２１の内部に堆積されることにより、突出部２２が形成される。なお、レーザの照射方向は、たとえば、表面２３に対して垂直方向であり、穿孔部２１の軸心が表面２３に対して垂直になる。 As an example of an apparatus for forming the perforated portion 21, a fiber laser marker MX-Z2000 or MX-Z2050 manufactured by OMRON can be given. With this fiber laser marker, it is possible to irradiate a laser where one pulse is composed of a plurality of subpulses. For this reason, the energy of the laser is easily concentrated in the depth direction, which is suitable for forming the perforated portion 21. Specifically, when the metal member 20 is irradiated with a laser, the metal member 20 is locally melted and the formation of the perforated portion 21 proceeds. At this time, since the laser is composed of a plurality of sub-pulses, the molten metal member 20 is not easily scattered and easily deposited in the vicinity of the perforated portion 21. Then, as the formation of the perforated part 21 proceeds, the molten metal member 20 is deposited inside the perforated part 21, thereby forming the protruding part 22. Note that the laser irradiation direction is, for example, a direction perpendicular to the surface 23, and the axis of the perforated part 21 is perpendicular to the surface 23.
　なお、上記ファイバレーザマーカによる加工条件としては、サブパルスの１周期が１５ｎｓ以下であることが好ましい。これは、サブパルスの１周期が１５ｎｓを超えると、熱伝導によりエネルギが拡散しやすくなり、突出部２２を有する穿孔部２１を形成しにくくなるためである。なお、サブパルスの１周期は、サブパルスの１回分の照射時間と、そのサブパルスの照射が終了されてから次回のサブパルスの照射が開始されるまでの間隔との合計時間である。 In addition, as a processing condition by the fiber laser marker, it is preferable that one period of the subpulse is 15 ns or less. This is because when one period of the sub-pulse exceeds 15 ns, energy is easily diffused by heat conduction, and it becomes difficult to form the perforated part 21 having the protruding part 22. Note that one cycle of the subpulse is a total time of the irradiation time for one subpulse and the interval from the end of the irradiation of the subpulse to the start of the irradiation of the next subpulse.
　また、上記ファイバレーザマーカによる加工条件としては、１パルスのサブパルス数は、２以上５０以下であることが好ましい。これは、サブパルス数が５０を超えると、サブパルスの単位あたりの出力が小さくなり、突出部２２を有する穿孔部２１を形成しにくくなるためである。 Further, as a processing condition by the fiber laser marker, the number of subpulses of one pulse is preferably 2 or more and 50 or less. This is because if the number of subpulses exceeds 50, the output per unit of subpulses becomes small, and it becomes difficult to form the perforated part 21 having the protruding parts 22.
　－平行度の補正方法－
　図５～図１０を参照して、接合構造体１００（金属部材２０および樹脂部材１０）の平行度の補正方法について説明する。 -Parallelism correction method-
With reference to FIGS. 5 to 10, a method of correcting the parallelism of the bonded structure 100 (the metal member 20 and the resin member 10) will be described.
　金属部材２０と樹脂部材１０との接合部の均一性の観点から、金属部材２０と樹脂部材１０との対面する平行度の補正機構を設けてもよい。平行度の補正機構を設けることにより、金属部材２０と樹脂部材１０との接合面が均一に対向することになり、レーザ照射時に突部１２が等方的に変形および沈み込むため、本願の目的効果を高めることができる。 From the viewpoint of the uniformity of the joint between the metal member 20 and the resin member 10, a correction mechanism for parallelism between the metal member 20 and the resin member 10 facing each other may be provided. By providing the parallelism correction mechanism, the joint surfaces of the metal member 20 and the resin member 10 are uniformly opposed, and the protrusion 12 isotropically deforms and sinks during laser irradiation. The effect can be enhanced.
　この方法では、たとえば、圧力測定シートを用いる方法およびシリコーンゴムを用いる方法などから適時選択することができる。 In this method, for example, a method using a pressure measurement sheet or a method using silicone rubber can be selected in a timely manner.
　以下、圧力測定シートを用いた場合の平行度の補正方法について説明する。 Hereinafter, a method for correcting the parallelism when the pressure measurement sheet is used will be described.
　圧力測定シートを用いる方法では、圧力が加わると色が変化し、圧力の大きさによって色合いが異なる。 In the method using a pressure measurement sheet, the color changes when pressure is applied, and the hue varies depending on the magnitude of the pressure.
　たとえば、図５に示すように、圧力測定シートを治具に設置した加圧用プレートとしての押さえガラス５０に挟む。押さえガラス５０は、金属部材２０または樹脂部材１０に接して設置される。押さえガラス５０を介して圧力測定シートへ加圧を行い、圧力測定シートの色合いが均一になるように治具の平行度の補正を行う。 For example, as shown in FIG. 5, the pressure measurement sheet is sandwiched between pressing glass 50 as a pressing plate installed in a jig. The holding glass 50 is installed in contact with the metal member 20 or the resin member 10. Pressure is applied to the pressure measurement sheet through the holding glass 50, and the parallelism of the jig is corrected so that the color of the pressure measurement sheet is uniform.
　具体的には、樹脂部材１０が治具（図示省略）によって保持され、その樹脂部材１０を保持する治具が加圧装置（図示省略）により加圧される。なお、加圧装置は、たとえばエアシリンダまたはバネなどである。これにより、図５に示すように、金属部材２０が押さえガラス５０に接触された状態で、金属部材２０および樹脂部材１０が押さえガラス５０側に押圧される。なお、押さえガラス５０は、レーザＬを透過可能に構成されている。 Specifically, the resin member 10 is held by a jig (not shown), and the jig holding the resin member 10 is pressurized by a pressurizing device (not shown). The pressurizing device is, for example, an air cylinder or a spring. As a result, as shown in FIG. 5, the metal member 20 and the resin member 10 are pressed toward the presser glass 50 while the metal member 20 is in contact with the presser glass 50. The holding glass 50 is configured to be able to transmit the laser L.
　ここで、図５に示すように、押さえガラス５０に対して樹脂部材１０が傾いている場合には、樹脂部材１０の突部１２と金属部材２０との接触圧の圧力分布にばらつきが発生する。たとえば、金属部材２０の押さえガラス５０と接触する部分の下方では、突部１２との接触圧が高くなり、金属部材２０の押さえガラス５０と離間する部分の下方では、突部１２との接触圧が低くなる。このように、圧力分布にばらつきが生じている状態でレーザ溶着を行った場合には、金属部材２０が局所的に沈み込むことにより、全体として十分な沈み込み量を得ることができないおそれがあり、また、部分的に溶着不良が発生するおそれがある。 Here, as shown in FIG. 5, when the resin member 10 is inclined with respect to the presser glass 50, variation occurs in the pressure distribution of the contact pressure between the protrusion 12 of the resin member 10 and the metal member 20. . For example, the contact pressure with the protrusion 12 increases below the portion of the metal member 20 that contacts the pressing glass 50, and the contact pressure with the protrusion 12 decreases below the portion of the metal member 20 that separates from the pressing glass 50. Becomes lower. As described above, when laser welding is performed in a state where the pressure distribution varies, the metal member 20 may sink locally, so that a sufficient sinking amount may not be obtained as a whole. Moreover, there is a possibility that poor welding occurs partially.
　そこで、本実施形態では、樹脂部材１０の突部１２と金属部材２０との接触圧が均等になるように補正を行う。具体的には、金属部材２０と押さえガラス５０との間に圧力測定シート（図６および図７参照）を配置した状態で加圧することにより、樹脂部材１０の突部１２と金属部材２０との接触圧を計測する。そして、その計測結果に応じて接触圧が均等になるように補正を行う。たとえば、樹脂部材１０と治具との間にシム（スペーサ）を配置することにより、押さえガラス５０に対して樹脂部材１０が垂直になる、すなわち押さえガラス５０と金属部材２０とが平行になるように、樹脂部材１０の向きを調整する。その後、接触圧が均等になるように樹脂部材１０の向きを調整した後に、圧力測定シートを取り除く。 Therefore, in this embodiment, correction is performed so that the contact pressure between the protrusion 12 of the resin member 10 and the metal member 20 becomes equal. Specifically, by applying pressure in a state where a pressure measurement sheet (see FIGS. 6 and 7) is disposed between the metal member 20 and the pressing glass 50, the protrusion 12 of the resin member 10 and the metal member 20 are Measure the contact pressure. And according to the measurement result, it correct | amends so that contact pressure may become equal. For example, by arranging a shim (spacer) between the resin member 10 and the jig, the resin member 10 is perpendicular to the pressing glass 50, that is, the pressing glass 50 and the metal member 20 are parallel to each other. Next, the orientation of the resin member 10 is adjusted. Then, after adjusting the direction of the resin member 10 so that a contact pressure becomes equal, a pressure measurement sheet | seat is removed.
　なお、金属部材２０と樹脂部材１０との平行度が適正（接触圧が均等）の場合には、図６に示すように、圧力測定シートの色合い（ドット領域Ｐ）が溶着領域Ｒ（突部１２の形成されている部分）に沿って均一になる。一方、金属部材２０と樹脂部材１０との平行度が不適正（接触圧が不均等）の場合には、図７に示すように、圧力測定シートの色合い（ドット領域Ｐ）が溶着領域Ｒ（突部１２の形成されている部分）に沿って不均一になる。たとえば、図７では、左側の領域に圧力が加わっていない。 In addition, when the parallelism of the metal member 20 and the resin member 10 is appropriate (contact pressure is equal), as shown in FIG. 6, the color (dot region P) of the pressure measurement sheet is changed to the welding region R (protrusion). 12), which becomes uniform. On the other hand, when the parallelism between the metal member 20 and the resin member 10 is inappropriate (contact pressure is not uniform), as shown in FIG. 7, the color (dot region P) of the pressure measurement sheet changes to the welding region R ( It becomes nonuniform along the part where the protrusion 12 is formed. For example, in FIG. 7, no pressure is applied to the left region.
　そして、図８に示すように、樹脂部材１０の向きを調整して加圧した状態で、光学ヘッド６０からレーザＬを照射する。すなわち、樹脂部材１０の突部１２と金属部材２０との接触圧が均等になるようにした状態でレーザＬが照射される。このレーザＬは、金属部材２０側から樹脂部材１０の溶着領域Ｒに向けて照射され、走査方向Ｓ（図１参照）に沿って複数回走査される。このため、樹脂部材１０の溶着領域Ｒと対応する部分の金属部材２０が加熱される。たとえば、光学ヘッド６０が、溶着領域Ｒの上方において走査方向Ｓに沿って移動しながらレーザＬを溶着領域Ｒに照射することが複数回繰り返し行われる。なお、レーザＬの発振器は、たとえば、波長が８０８ｎｍの半導体レーザである。 Then, as shown in FIG. 8, the laser L is irradiated from the optical head 60 in a state where the direction of the resin member 10 is adjusted and pressurized. That is, the laser L is irradiated in a state where the contact pressure between the protrusion 12 of the resin member 10 and the metal member 20 is equalized. The laser L is irradiated from the metal member 20 side toward the welding region R of the resin member 10, and is scanned a plurality of times along the scanning direction S (see FIG. 1). For this reason, the metal member 20 of the part corresponding to the welding area | region R of the resin member 10 is heated. For example, the optical head 60 repeatedly irradiates the welding region R with the laser L while moving along the scanning direction S above the welding region R a plurality of times. The oscillator of the laser L is, for example, a semiconductor laser having a wavelength of 808 nm.
　これにより、図９に示すように、突部１２が溶融され、金属部材２０が樹脂部材１０に対して沈み込む。このとき、樹脂部材１０の突部１２と金属部材２０との間にそりやひけなどに起因する隙間が部分的に形成されていたとしても、金属部材２０の沈み込みによりその隙間を吸収しながら溶着される。このようにして、樹脂部材１０および金属部材２０を接合した接合構造体１００が得られる。 Thereby, as shown in FIG. 9, the protrusion 12 is melted and the metal member 20 sinks into the resin member 10. At this time, even if a gap due to warpage or sink marks is partially formed between the protrusion 12 of the resin member 10 and the metal member 20, while the metal member 20 sinks, the gap is absorbed. Welded. In this way, a bonded structure 100 in which the resin member 10 and the metal member 20 are bonded is obtained.
　次に、シリコーンゴムを用いた場合の平行度の補正方法について説明する。 Next, a method for correcting parallelism when silicone rubber is used will be described.
　一方、シリコーンゴムを用いる方法では、図１０に示すように、治具に設置された支持板５２と、治具に設置されるとともに樹脂部材１０または金属部材２０と接して取り付けられた押さえガラス５０と、支持板５２と押さえガラス５０との間に挟まれたシリコーンゴム５１とにより、シリコーンゴム５１の弾性を利用して平行度の吸収を行い、加圧分布を均一化される。 On the other hand, in the method using silicone rubber, as shown in FIG. 10, a support plate 52 installed in a jig and a holding glass 50 installed in the jig and in contact with the resin member 10 or the metal member 20. Then, the silicone rubber 51 sandwiched between the support plate 52 and the pressing glass 50 absorbs parallelism using the elasticity of the silicone rubber 51, and the pressure distribution is made uniform.
　図１０に示すように、樹脂部材１０の突部１２と金属部材２０との接触圧のばらつきを吸収するシリコーンゴム５１を介して圧力を印加することにより、その接触圧が均等になるようにしてもよい。具体的には、押さえガラス５０は、シリコーンゴム５１を介して支持板５２に取り付けられている。シリコーンゴム５１は、弾性変形可能である。支持板５２は、レーザＬを透過可能であり、所定の位置に固定されている。 As shown in FIG. 10, by applying pressure through the silicone rubber 51 that absorbs variation in the contact pressure between the protrusion 12 of the resin member 10 and the metal member 20, the contact pressure is made uniform. Also good. Specifically, the pressing glass 50 is attached to the support plate 52 via the silicone rubber 51. The silicone rubber 51 can be elastically deformed. The support plate 52 can transmit the laser L and is fixed at a predetermined position.
　このため、支持板５２に対して樹脂部材１０が傾いた状態で加圧された場合には、シリコーンゴム５１が伸縮することにより樹脂部材１０および金属部材２０の傾きに応じて押さえガラス５０が傾くようになっている。したがって、押さえガラス５０に対して樹脂部材１０が垂直、すなわち押さえガラス５０と金属部材２０とが平行になり、樹脂部材１０の突部１２と金属部材２０との接触圧が均等になるようにすることができる。 For this reason, when the resin member 10 is pressurized with respect to the support plate 52, the silicone rubber 51 expands and contracts, so that the holding glass 50 is inclined according to the inclination of the resin member 10 and the metal member 20. It is like that. Therefore, the resin member 10 is perpendicular to the presser glass 50, that is, the presser glass 50 and the metal member 20 are parallel, and the contact pressure between the protrusion 12 of the resin member 10 and the metal member 20 is made equal. be able to.
　このように構成すれば、樹脂部材１０と金属部材２０との接触圧を計測する工程と、計測結果に応じて接触圧を補正する工程とを省略しても、接触圧の均等化を図ることが可能となる。 If comprised in this way, even if the process of measuring the contact pressure of the resin member 10 and the metal member 20 and the process of correcting the contact pressure according to the measurement result are omitted, the contact pressure can be equalized. Is possible.
　－レーザ接合－
　上記のように、樹脂部材１０は、穿孔部２１が形成された金属部材２０の表面２３に接合されている。この樹脂部材１０は、たとえば、レーザ接合によって金属部材２０に接合されている。これにより、樹脂部材１０が金属部材２０の穿孔部２１に充填された状態で固化されている。 -Laser bonding-
As described above, the resin member 10 is bonded to the surface 23 of the metal member 20 in which the perforated portion 21 is formed. The resin member 10 is bonded to the metal member 20 by, for example, laser bonding. Thereby, the resin member 10 is solidified in a state in which the perforated portion 21 of the metal member 20 is filled.
　このような接合構造体１００は、たとえば、光電センサの樹脂ケース（図示省略）に金属カバー（図示省略）を接合させる場合に適用可能である。この場合には、樹脂ケースが樹脂部材１０に相当し、金属カバーが金属部材２０に相当する。 Such a bonded structure 100 is applicable, for example, when a metal cover (not shown) is bonded to a resin case (not shown) of a photoelectric sensor. In this case, the resin case corresponds to the resin member 10, and the metal cover corresponds to the metal member 20.
　以下に、接合工程の一例として、レーザ接合について説明する。 Hereinafter, laser bonding will be described as an example of the bonding process.
　レーザ接合では、金属部材２０と樹脂部材１０とを治具などで加圧して面接触させた後に、レーザ照射を行う。レーザ照射は、樹脂部材１０側（レーザ透過性を有する場合のみ）、および／または、金属部材２０側から照射する。突部１２の設置上にレーザを複数回走査させる。これにより、面精度が低い金属部材２０、および／または、樹脂部材１０を用いた場合でも、変形、沈み込みによる材料間隙間吸収ができ、金属部材２０側に吸収されたレーザエネルギーを効率的に対面する樹脂部材１０側へ伝熱させることで、強固な金属部材２０と樹脂部材１０との接合構造体１００が得られる。なお、接合用のレーザの種類としては、ファイバレーザ、ＹＡＧレーザ、ＹＶＯ4レーザ、半導体レーザ、炭酸ガスレーザ、または、エキシマレーザが選択できる。 In laser bonding, the metal member 20 and the resin member 10 are pressed with a jig or the like and brought into surface contact, and then laser irradiation is performed. Laser irradiation is performed from the resin member 10 side (only when having laser transparency) and / or the metal member 20 side. The laser is scanned a plurality of times on the installation of the protrusion 12. Thereby, even when the metal member 20 and / or the resin member 10 with low surface accuracy are used, the gap between the materials can be absorbed by deformation and sinking, and the laser energy absorbed on the metal member 20 side can be efficiently absorbed. By transferring heat to the facing resin member 10 side, a strong bonded structure 100 of the metal member 20 and the resin member 10 is obtained. As the type of laser for bonding, fiber laser, YAG laser, YVO 4 laser, a semiconductor laser, a carbon dioxide laser, or excimer laser can be selected.
　レーザ照射の実施例条件は、以下の通りである。 Example conditions for laser irradiation are as follows.
　レーザ：半導体レーザ（波長８０８ｎｍ）
　発振モード：連続発振
　出力：３０Ｗ
　焦点径：４ｍｍ
　走査速度：１ｍｍ／ｓｅｃ
　密着圧力：０．６ＭＰａ Laser: Semiconductor laser (wavelength 808 nm)
Oscillation mode: Continuous oscillation Output: 30W
Focal diameter: 4mm
Scanning speed: 1mm / sec
Contact pressure: 0.6 MPa
　－レーザ走査回数－
　レーザ走査回数は、同一軌跡を複数回走査する。複数回の走査を実施することにより、突部１２の変形および沈み込み量が大きくなるので、所望の隙間吸収が実現できる。その理由としては、走査回数が１回の場合、突部１２の変形および沈み込み量が小さいため、所望の隙間吸収が実現できないからである。 -Number of laser scans-
As for the number of times of laser scanning, the same locus is scanned a plurality of times. By performing scanning a plurality of times, the deformation and sinking amount of the protrusion 12 are increased, so that a desired gap absorption can be realized. The reason is that when the number of scans is one, deformation of the protrusion 12 and the amount of sinking are small, so that it is not possible to achieve a desired gap absorption.
　－変形例－
　図１２に示すように、第１変形例による接合構造体１０１の突部１２ａの断面形状は、矩形状であってもよい。また、図１３に示すように、第２変形例による接合構造体１０２の突部１２ｂの断面形状は、三角形状であってもよい。また、図１４に示すように、第３変形例による接合構造体１０３の突部１２ｃの断面形状は、半円形状であってもよい。また、図１５に示すように、第４変形例による接合構造体１０４の突部１２ｄの断面形状は、樹脂部材１０から金属部材２０に向かって先細るように突出するとともに先端が半円形状であってもよい。また、図１６に示すように、第５変形例による接合構造体１０５の突部１２ｅの断面形状は、樹脂部材１０から金属部材２０に向かって同じ幅で突出するとともに先端が半円形状であってもよい。また、図１７に示すように、第６変形例による接合構造体１０６では、金属部材２０に突部２４を形成するとともに、樹脂部材１０には突部を形成しなくてもよい。また、図１８に示すように、第７変形例による接合構造体１０７では、金属部材２０に突部２４を形成するとともに、樹脂部材１０に突部１２を形成してもよい。 -Modification-
As shown in FIG. 12, the cross-sectional shape of the protrusion 12a of the joint structure 101 according to the first modification may be a rectangular shape. Moreover, as shown in FIG. 13, the cross-sectional shape of the protrusion 12b of the joint structure 102 according to the second modification may be triangular. Moreover, as shown in FIG. 14, the cross-sectional shape of the protrusion 12c of the joint structure 103 according to the third modification may be a semicircular shape. Further, as shown in FIG. 15, the cross-sectional shape of the protrusion 12 d of the joint structure 104 according to the fourth modified example projects so as to taper from the resin member 10 toward the metal member 20 and has a semicircular tip. There may be. Also, as shown in FIG. 16, the cross-sectional shape of the protrusion 12e of the joint structure 105 according to the fifth modified example protrudes from the resin member 10 toward the metal member 20 with the same width and the tip is semicircular. May be. As shown in FIG. 17, in the joint structure 106 according to the sixth modification, the protrusion 24 may be formed on the metal member 20, and the protrusion may not be formed on the resin member 10. As shown in FIG. 18, in the joint structure 107 according to the seventh modification, the protrusion 24 may be formed on the metal member 20 and the protrusion 12 may be formed on the resin member 10.
　－実験例（接合強度の試験方法）－
　次に、上記した本実施形態の効果を確認するために行った実験例について説明する。 -Experimental example (Test method for bonding strength)-
Next, an experimental example performed to confirm the effect of the above-described embodiment will be described.
　この実験例では、本実施形態に対応する実施例１、２、３および４による接合構造体５００（図１１参照）と、比較例１による接合構造体とを作製し、それぞれについての接合評価を行った。その結果を表１に示す。 In this experimental example, a bonded structure 500 (see FIG. 11) according to Examples 1, 2, 3, and 4 corresponding to the present embodiment and a bonded structure according to Comparative Example 1 are produced, and the bonding evaluation is performed for each. went. The results are shown in Table 1.
Figure JPOXMLDOC01-appb-T000001
  
Figure JPOXMLDOC01-appb-T000001
  
　まず、表１に示す実施例１～４による接合構造体５００の作製方法について説明する。 First, a method for manufacturing the bonded structure 500 according to Examples 1 to 4 shown in Table 1 will be described.
　実施例１～４の接合構造体５００は、板状に形成されており、金属部材５０１（図１１参照）は、ＳＵＳ３０４であり、長さが１００ｍｍであり、幅が２９ｍｍであり、厚みが３ｍｍである。樹脂部材５０２（図１１参照）は、ＰＭＭＡ樹脂であり、長さが１００ｍｍであり、幅が２５ｍｍであり、厚みが３ｍｍである。 The bonded structures 500 of Examples 1 to 4 are formed in a plate shape, and the metal member 501 (see FIG. 11) is SUS304, the length is 100 mm, the width is 29 mm, and the thickness is 3 mm. It is. The resin member 502 (see FIG. 11) is PMMA resin, has a length of 100 mm, a width of 25 mm, and a thickness of 3 mm.
　接合強度の評価は、インストロン製の電気機械式万能試験機５９００を用いて行った。具体的には、せん断方向に引張速度５ｍｍ／ｍｉｎで試験を行い、突部１２が形成されていない接合構造体を基準（比較例）として、基準以上の接合強度が発現するものを合格（○）であると評価した。また、基準未満の接合強度が発現するものを不合格（×）であると評価した。 The joint strength was evaluated using an Instron electromechanical universal testing machine 5900. Specifically, the test was conducted at a tensile speed of 5 mm / min in the shear direction, and a bonded structure having no protrusion 12 formed as a reference (comparative example) passed (+ ). Moreover, it evaluated that it was a rejection (x) that the joint strength less than a reference | standard was expressed.
　上記した表１に示すように、比較例１による接合構造体では、金属部材および樹脂部材のいずれにも突部を設置せず、レーザの走査回数を複数回（３回）とした。その結果、接合強度は１３．８Ｍｐａであった。 As shown in Table 1 above, in the bonded structure according to Comparative Example 1, no protrusion was provided on either the metal member or the resin member, and the number of times of laser scanning was set to a plurality of times (three times). As a result, the bonding strength was 13.8 Mpa.
　実施例１による接合構造体５００では、樹脂部材５０２に突部を設置し、突部の高さを０．１０ｍｍとし、レーザの走査回数を複数回（３回）とした。その結果、接合強度は１６．７Ｍｐａであった。 In the bonded structure 500 according to Example 1, a protrusion was provided on the resin member 502, the height of the protrusion was set to 0.10 mm, and the number of times of laser scanning was set to a plurality of times (three times). As a result, the bonding strength was 16.7 Mpa.
　実施例２による接合構造体５００では、樹脂部材５０２に突部を設置し、突部の高さを０．５０ｍｍとし、レーザの走査回数を複数回（３回）とした。その結果、接合強度は１７．１Ｍｐａであった。 In the bonded structure 500 according to Example 2, a protrusion was provided on the resin member 502, the height of the protrusion was 0.50 mm, and the number of laser scans was multiple (three). As a result, the bonding strength was 17.1 Mpa.
　実施例３による接合構造体５００では、金属部材５０１に突部を設置し、突部の高さを０．１０ｍｍとし、レーザの走査回数を複数回（３回）とした。その結果、接合強度は１５．７Ｍｐａであった。 In the joint structure 500 according to Example 3, a protrusion was provided on the metal member 501, the height of the protrusion was 0.10 mm, and the number of times of laser scanning was set to a plurality of times (three times). As a result, the bonding strength was 15.7 Mpa.
　実施例４による接合構造体５００では、金属部材５０１および樹脂部材５０２のいずれにも突部を設置し、各突部の高さを０．１０ｍｍとし、レーザの走査回数を複数回（３回）とした。その結果、接合強度は１７．２Ｍｐａであった。 In the joint structure 500 according to the fourth embodiment, protrusions are provided on both the metal member 501 and the resin member 502, the height of each protrusion is 0.10 mm, and the number of times of laser scanning is three (3). It was. As a result, the bonding strength was 17.2 Mpa.
　これにより、実施例１～４の接合構造体５００は、金属部材５０１および樹脂部材５０２の少なくともいずれか一方に突部を形成することによって、突部を形成しない場合（比較例１）と比べて、接合強度が高くなっていた。 Thus, in the bonded structures 500 according to the first to fourth embodiments, the protrusions are formed on at least one of the metal member 501 and the resin member 502, so that the protrusions are not formed (Comparative Example 1). The bonding strength was high.
　また、比較例２～４による接合構造体を作製し、比較例２～４による接合構造体の接合評価を行った。その結果を表２に示す。 In addition, the bonded structures according to Comparative Examples 2 to 4 were prepared, and the bonding evaluation of the bonded structures according to Comparative Examples 2 to 4 was performed. The results are shown in Table 2.
Figure JPOXMLDOC01-appb-T000002
  
Figure JPOXMLDOC01-appb-T000002
  
　上記した表２に示すように、比較例２による接合構造体では、樹脂部材に突部を設置し、突部の高さを０．１０ｍｍとし、レーザの走査回数を１回とした。その結果、接合強度は６．８Ｍｐａであった。 As shown in Table 2 above, in the joint structure according to Comparative Example 2, a protrusion was provided on the resin member, the height of the protrusion was 0.10 mm, and the number of times of laser scanning was one. As a result, the bonding strength was 6.8 Mpa.
　比較例３による接合構造体では、金属部材に突部を設置し、突部の高さを０．１０ｍｍとし、レーザの走査回数を１回とした。その結果、接合強度は５．７Ｍｐａであった。 In the bonded structure according to Comparative Example 3, a protrusion was provided on a metal member, the height of the protrusion was 0.10 mm, and the number of times of laser scanning was one. As a result, the bonding strength was 5.7 Mpa.
　比較例４による接合構造体では、金属部材および樹脂部材のいずれにも突部を設置し、突部の高さを０．１０ｍｍとし、レーザの走査回数を１回とした。その結果、接合強度は７．０Ｍｐａであった。 In the bonded structure according to Comparative Example 4, the protrusions were installed on both the metal member and the resin member, the height of the protrusion was 0.10 mm, and the number of times of laser scanning was one. As a result, the bonding strength was 7.0 Mpa.
　これにより、比較例２～４の接合構造体は、レーザ走査回数を１回にすることによって、比較例１および実施例１～４によるレーザ走査回数を複数回（３回）にする場合と比べて、接合強度が低くなっていた。言い換えると、レーザの走査回数を複数回にすることによって、接合強度が向上することが判明した。 Thus, the bonded structures of Comparative Examples 2 to 4 are compared with the case where the number of times of laser scanning in Comparative Example 1 and Examples 1 to 4 is set to a plurality of times (three times) by setting the number of times of laser scanning to one. As a result, the bonding strength was low. In other words, it has been found that the bonding strength is improved by setting the number of times of laser scanning to a plurality of times.
　以上説明したように、本実施形態によるレーザ溶着方法および接合構造体１００によれば、以下に列記するような効果が得られる。すなわち、本実施形態では、上記のように、面精度が低い金属部材２０および／または樹脂部材１０を用いた場合でも、突部１２の変形および沈み込みによる材料間の隙間を吸収することができるとともに、金属部材２０と樹脂部材１０との接触面積が増加することにより金属部材２０側に吸収されたレーザエネルギーを効率的に樹脂部材１０側へ伝熱させることができる（熱伝導量が増加する）ので、金属部材２０と樹脂部材１０とを強固に接合することができる。 As described above, according to the laser welding method and the bonded structure 100 according to the present embodiment, the effects listed below can be obtained. That is, in this embodiment, as described above, even when the metal member 20 and / or the resin member 10 with low surface accuracy is used, the gap between the materials due to the deformation and sinking of the protrusion 12 can be absorbed. At the same time, by increasing the contact area between the metal member 20 and the resin member 10, the laser energy absorbed on the metal member 20 side can be efficiently transferred to the resin member 10 side (the amount of heat conduction increases). Therefore, the metal member 20 and the resin member 10 can be firmly joined.
　（他の実施形態）
　なお、今回開示した実施形態は、すべての点で例示であって、限定的な解釈の根拠となるものではない。したがって、本発明の技術的範囲は、上記した実施形態のみによって解釈されるものではなく、特許請求の範囲の記載に基づいて画定される。また、本発明の技術的範囲には、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれる。 (Other embodiments)
In addition, embodiment disclosed this time is an illustration in all the points, Comprising: It does not become a basis of limited interpretation. Therefore, the technical scope of the present invention is not interpreted only by the above-described embodiments, but is defined based on the description of the scope of claims. Further, the technical scope of the present invention includes all modifications within the meaning and scope equivalent to the scope of the claims.
　たとえば、上記実施形態では、突部の形状の一例としてテーパ形状等を示したが、本発明はこれに限られない。本発明では、金属部材および樹脂部材の少なくとも一方の表面から突出するような形状であればどのような形状であってもよい。 For example, in the above embodiment, a tapered shape or the like is shown as an example of the shape of the protrusion, but the present invention is not limited to this. In the present invention, any shape may be used as long as it protrudes from the surface of at least one of the metal member and the resin member.
　また、上記実施形態では、平行度の補正方法の一例として、圧力測定シートまたはシリコーンゴムを用いる方法を示したが、本発明はこれに限られない。たとえば、平行度の補正方法を圧力測定シートまたはシリコーンゴム以外の部材を用いることも可能である。 In the above embodiment, a method using a pressure measurement sheet or silicone rubber is shown as an example of a method for correcting parallelism, but the present invention is not limited to this. For example, a member other than the pressure measurement sheet or silicone rubber can be used as a method for correcting the parallelism.
　また、上記実施形態では、穿孔部に突出部が形成される例を示したが、本発明はこれに限られない。たとえば、穿孔部の断面形状が矩形状や半円形状であってもよい。また、穿孔部は、平面的に見て、連続して延びるような溝状であってもよいし、所定の間隔を隔てて形成されていてもよい。 In the above embodiment, the example in which the protruding portion is formed in the perforated portion is shown, but the present invention is not limited to this. For example, the cross-sectional shape of the perforated part may be rectangular or semicircular. Further, the perforated part may have a groove shape that continuously extends in a plan view, or may be formed at a predetermined interval.
　本発明は、レーザ溶着方法および接合構造体に利用可能である。 The present invention can be used for a laser welding method and a bonded structure.
　１０　樹脂部材
　１２、１２ａ、１２ｂ、１２ｃ、１２ｄ、１２ｅ、１２ｆ　突部
　２０　金属部材
　２１　穿孔部
　２４　突部
　１００、１０１、１０２、１０３、１０４、１０５、１０６、１０７　接合構造体
　５００　接合構造体
　５０１　金属部材
　５０２　樹脂部材 DESCRIPTION OF SYMBOLS 10 Resin member 12,12a, 12b, 12c, 12d, 12e, 12f Protrusion part 20 Metal member 21 Perforated part 24 Protrusion part 100,101,102,103,104,105,106,107 Joining structure 500 Joining structure 501 Metal member 502 Resin member

Claims (5)

  1. 　金属部材と樹脂部材とをレーザで溶着するレーザ溶着方法において、
    　前記金属部材および前記樹脂部材のうち少なくとも一方の溶着領域に突部を形成する工程と、
    　前記金属部材と前記樹脂部材とを治具により、前記突部へ均一に圧力を加えながら、前記突部に対して、前記樹脂部材側および前記金属部材側のうち少なくとも一方から溶着領域に向けてレーザを複数回走査して、前記金属部材と前記樹脂部材とを接合する工程とを備えることを特徴とするレーザ溶着方法。     In a laser welding method of welding a metal member and a resin member with a laser,
    Forming a protrusion in at least one welding region of the metal member and the resin member;
    The metal member and the resin member are uniformly applied to the protrusion with a jig, and the protrusion is directed toward the welding region from at least one of the resin member side and the metal member side with respect to the protrusion. A laser welding method comprising: scanning a laser a plurality of times to join the metal member and the resin member.
  2. 　請求項１に記載のレーザ溶着方法において、
    　前記突部を形成する工程の後に、前記突部に圧力が均一に加わるように、前記金属部材と前記樹脂部材との対面する平行度を補正する工程をさらに備えることを特徴とするレーザ溶着方法。     In the laser welding method of Claim 1,
    After the step of forming the protrusion, the method further comprises a step of correcting the parallelism of the metal member and the resin member so that pressure is uniformly applied to the protrusion. .
  3. 　請求項１または２に記載のレーザ溶着方法において、
    　前記金属部材の表面に開口を有する穿孔部を形成する工程をさらに備えることを特徴とするレーザ溶着方法。     The laser welding method according to claim 1 or 2,
    The laser welding method, further comprising the step of forming a perforated portion having an opening on the surface of the metal member.
  4. 　請求項３に記載のレーザ溶着方法において、
    　前記穿孔部を形成する工程は、１パルスが複数のサブパルスで構成されるレーザを前記金属部材の表面に照射することにより、前記穿孔部を形成する工程であることを特徴とするレーザ溶着方法。     In the laser welding method of Claim 3,
    The step of forming the perforated part is a step of forming the perforated part by irradiating the surface of the metal member with a laser having one pulse composed of a plurality of sub-pulses.
  5. 　請求項１～４のいずれか１つに記載のレーザ溶着方法を用いて形成されることを特徴とする接合構造体。 A bonded structure formed by using the laser welding method according to any one of claims 1 to 4.
PCT/JP2016/051275 2015-01-19 2016-01-18 Laser welding method and bonded structure WO2016117501A1 (en)

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JP7264406B2 (en) * 2018-09-25 2023-04-25 株式会社ヒロテック METHOD FOR JOINING METAL MATERIAL AND METAL JOINT

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