JP2013173248A - Laser joining method - Google Patents

Laser joining method Download PDF

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Publication number
JP2013173248A
JP2013173248A JP2012038155A JP2012038155A JP2013173248A JP 2013173248 A JP2013173248 A JP 2013173248A JP 2012038155 A JP2012038155 A JP 2012038155A JP 2012038155 A JP2012038155 A JP 2012038155A JP 2013173248 A JP2013173248 A JP 2013173248A
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JP
Japan
Prior art keywords
thermoplastic resin
laser
metal material
joined
joining
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2012038155A
Other languages
Japanese (ja)
Inventor
Kenji Senda
健史 千田
Satoshi Arai
聡 荒井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
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Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2012038155A priority Critical patent/JP2013173248A/en
Priority to PCT/JP2013/054433 priority patent/WO2013125664A1/en
Publication of JP2013173248A publication Critical patent/JP2013173248A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/44—Joining a heated non plastics element to a plastics element
    • 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
    • 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
    • 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
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3468—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of windings
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—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
    • B29C66/1222—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
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—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
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • 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
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/30—Organic material
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
    • 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
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    • B29C66/124—Tongue and groove joints
    • B29C66/1244—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue
    • B29C66/12441—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue being a single wall
    • 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
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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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    • 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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    • B29C66/1312—Single flange to flange joints, the parts to be joined being rigid
    • B—PERFORMING OPERATIONS; TRANSPORTING
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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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    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3481—Housings or casings incorporating or embedding electric or electronic elements

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

Abstract

PROBLEM TO BE SOLVED: To solve a problem that a thermoplastic resin should permeate laser in the use of laser heating for local heating when joining a metal or an inorganic joining material and the thermoplastic resin.SOLUTION: In a laser joining method, a thermoplastic resin and a metal material contact with each other and a laser beam is irradiated to the metal material without being transmitted to the thermoplastic resin to heat the metal material and the thermoplastic resin and to join the thermoplastic resin and the metal material. Consequently, the method for laser joining is provided even if the thermoplastic resin is not light-permeable.

Description

本発明は、熱可塑性から成る樹脂と金属をレーザ照射により接合するレーザ接合方法に関する。   The present invention relates to a laser joining method in which a thermoplastic resin and a metal are joined by laser irradiation.

従来、熱可塑性樹脂材料同士を接合する際の二次加工法として、接着剤を用いて両者を接合することが一般的に行われている。接着剤の塗布、硬化といった接合工程の簡略化や、環境負荷に対応するために、超音波溶着やレーザ溶着などで互いに接合する熱可塑性樹脂表面を溶融させて接合する方法も行われている。   Conventionally, as a secondary processing method for joining thermoplastic resin materials, it has been generally performed to join the two using an adhesive. In order to simplify the joining process such as application and curing of the adhesive, and to cope with environmental loads, a method of joining the thermoplastic resin surfaces that are joined together by ultrasonic welding, laser welding, or the like is also performed.

本発明の背景技術として、例えば、特許文献１には、透明樹脂の間に固形状の無機物を挟み、透明樹脂を透過して無機物に対してレーザ光を照射して加熱し、無機物を介して樹脂を接合する方法が示されている。   As a background art of the present invention, for example, in Patent Document 1, a solid inorganic material is sandwiched between transparent resins, the transparent resin is transmitted and irradiated with laser light to heat the inorganic material, and the inorganic material is interposed. A method of joining the resins is shown.

また、特許文献２には、２つの熱可塑性樹脂の間にトリアジンチオール系化合物で表面処理した金属材を挟み、この金属を電磁誘導加熱装置により加熱して樹脂と金属をそれぞれ接合する方法が示されている。   Patent Document 2 discloses a method in which a metal material surface-treated with a triazine thiol compound is sandwiched between two thermoplastic resins, and the metal and the metal are heated by an electromagnetic induction heating device to join the resin and the metal, respectively. Has been.

特開２００１−２３２６８７号公報JP 2001-232687 A 特開２００４−２４４４４６号公報JP 2004-244446 A

上記特許文献１で開示されている技術は、光透過性の透明樹脂に無機物の中間材を挟み、レーザ光を無機物に照射することにより接合することが示されている。しかしながら、レーザ光は光透過性樹脂を透過して金属材に照射されており、使用できる樹脂は光透過性樹脂に限定されるという課題があった。上記特許文献２で開示されている技術は、樹脂の間に挟んだ金属材を電磁誘導加熱により加熱することになるが、加熱部の周囲に金属製の部品が存在する場合には同時に加熱されるという課題があった。   The technique disclosed in Patent Document 1 shows that an inorganic intermediate material is sandwiched between light-transmitting transparent resins and the inorganic material is irradiated with laser light to join them. However, the laser beam is transmitted through the light-transmitting resin and irradiated to the metal material, and there is a problem that the resin that can be used is limited to the light-transmitting resin. The technique disclosed in Patent Document 2 heats a metal material sandwiched between resins by electromagnetic induction heating. However, when a metal part is present around the heating unit, the metal material is heated at the same time. There was a problem that.

そこで、本発明の目的は、熱可塑性樹脂と金属材を重ね合わせて、この金属材にレーザ光を直接照射して、金属の伝熱を利用して熱可塑性樹脂と金属材を同時に接合する方法を提供することにある。   Accordingly, an object of the present invention is to superimpose a thermoplastic resin and a metal material, and directly irradiate the metal material with a laser beam, and simultaneously join the thermoplastic resin and the metal material using metal heat transfer. Is to provide.

本発明では上記課題を解決するために、レーザ接合方法において、熱可塑性樹脂と金属材とを接触させ、熱可塑性樹脂を通さずに金属材にレーザ光を照射することによって、金属材及び熱可塑性樹脂を加熱し、熱可塑性樹脂と金属材を接合することを特徴とする。   In the present invention, in order to solve the above-described problem, in the laser bonding method, the thermoplastic resin and the metal material are brought into contact with each other, and the metal material and the thermoplastic resin are irradiated by irradiating the metal material with laser light without passing through the thermoplastic resin. The resin is heated to join the thermoplastic resin and the metal material.

本発明により、熱可塑性樹脂が光透過性でなくてもレーザ接合が可能な方法を提供することができる。   According to the present invention, it is possible to provide a method capable of laser bonding even if the thermoplastic resin is not light transmissive.

本発明の一実施例にかかる熱可塑性樹脂と金属のレーザ接合の断面図である。It is sectional drawing of the laser joining of the thermoplastic resin and metal concerning one Example of this invention. 本発明の一実施例にかかる熱可塑性樹脂と金属のレーザ接合の断面図である。It is sectional drawing of the laser joining of the thermoplastic resin and metal concerning one Example of this invention. 本発明の一実施例にかかる熱可塑性樹脂と金属のレーザ接合の断面図である。It is sectional drawing of the laser joining of the thermoplastic resin and metal concerning one Example of this invention. 本発明の一実施例にかかる熱可塑性樹脂と金属のレーザ接合の断面図である。It is sectional drawing of the laser joining of the thermoplastic resin and metal concerning one Example of this invention. 本発明の一実施例にかかる熱可塑性樹脂と金属のレーザ接合の断面図である。It is sectional drawing of the laser joining of the thermoplastic resin and metal concerning one Example of this invention. 本発明の一実施例にかかる熱可塑性樹脂と金属のレーザ接合の断面図である。It is sectional drawing of the laser joining of the thermoplastic resin and metal concerning one Example of this invention. 本発明の一実施例にかかる熱可塑性樹脂と金属のレーザ接合の断面図である。It is sectional drawing of the laser joining of the thermoplastic resin and metal concerning one Example of this invention. 本発明の一実施例にかかる熱可塑性樹脂と金属のレーザ接合の断面図である。It is sectional drawing of the laser joining of the thermoplastic resin and metal concerning one Example of this invention. 金属材と熱可塑性樹脂製の筐体に適用するときの一例を示す模式図である。It is a schematic diagram which shows an example when applying to the housing | casing made from a metal material and a thermoplastic resin. 本発明の一実施例にかかる熱可塑性樹脂と金属のレーザ接合方法の実施例を示す平面図である。It is a top view which shows the Example of the laser joining method of the thermoplastic resin and metal concerning one Example of this invention.

本発明の実施の形態について以下に説明する。本発明で用いる熱可塑性樹脂は、非結晶性もしくは結晶性樹脂からなる。非結晶性樹脂としては、ポリスチレン（ＰＳ）、アクリロニトリルスチレン（ＡＳ）、アクリロニトリルブタジエンスチレン共重合体（ＡＢＳ）、ポリエーテルイミド（ＰＥＩ）、ポリカーボネート（ＰＣ）、ポリアリレート（ＰＡＲ）、ポリメチルメタアクリル酸メチル（ＰＭＭＡ）、シクロオレフィンポリマー（ＣＯＰ）、シクロオレフィンコポリマー（ＣＯＣ）、ポリサルホン（ＰＳＦ）、ポリエーテルサルホン（ＰＥＳ）、ポリ塩化ビニル（ＰＶＣ）、ポリ塩化ビニルデン（ＰＶＤＣ）が挙げられる。結晶性樹脂としては、ポリエチレン（ＰＥ）、ポリプロプレン（ＰＰ）、ポリオキシメチレン（ＰＯＭ）、ポリエチレンテレフタレート（ＰＥＴ）、ポリトリメチレンテレフタレート（ＰＴＴ）、ポリブチレンテレフタレート（ＰＢＴ）、ポリエチレンナフタレート（ＰＥＮ）、ポリフェニレンサルファイド（ＰＰＳ）、ナイロン６（ＰＡ６）、ナイロン６６（ＰＡ６６）、ナイロン６Ｔ（ＰＡ６Ｔ）、ポリエーテルエーテルケトン（ＰＥＥＫ）、液晶ポリマー（ＬＣＰ）、ポリテトラフルオロエチレン（ＰＴＦＥ）が挙げられる。また、それらのアロイ材やフィラーを含んだ熱可塑性樹脂も対象となる。樹脂の厚さは特に限定されない。   Embodiments of the present invention will be described below. The thermoplastic resin used in the present invention is made of an amorphous or crystalline resin. Non-crystalline resins include polystyrene (PS), acrylonitrile styrene (AS), acrylonitrile butadiene styrene copolymer (ABS), polyetherimide (PEI), polycarbonate (PC), polyarylate (PAR), and polymethylmethacrylic. Examples include methyl acid (PMMA), cycloolefin polymer (COP), cycloolefin copolymer (COC), polysulfone (PSF), polyethersulfone (PES), polyvinyl chloride (PVC), and polyvinylidene chloride (PVDC). As crystalline resins, polyethylene (PE), polypropylene (PP), polyoxymethylene (POM), polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN) ), Polyphenylene sulfide (PPS), nylon 6 (PA6), nylon 66 (PA66), nylon 6T (PA6T), polyetheretherketone (PEEK), liquid crystal polymer (LCP), polytetrafluoroethylene (PTFE). . Further, thermoplastic resins containing those alloy materials and fillers are also targeted. The thickness of the resin is not particularly limited.

金属としては、鉄、アルミニウム、銅、ニッケル、金、チタン、合金（ステンレス鋼、真鍮、アルミニウム合金、リン青銅など）、ダイカストなどを挙げることができる。また、本発明では、金属材料の厚さは１ｍｍ以上であることが望ましい。また、金属材以外にも熱伝導性を有する無機材料(セラミックスなど)を使用することも可能である。さらに、２００Ｗ／（ｍ・Ｋ）以上の熱伝導性を有する材料が望ましい。   Examples of the metal include iron, aluminum, copper, nickel, gold, titanium, alloys (stainless steel, brass, aluminum alloy, phosphor bronze, etc.), die casting, and the like. In the present invention, the thickness of the metal material is preferably 1 mm or more. In addition to metal materials, it is also possible to use inorganic materials (such as ceramics) having thermal conductivity. Furthermore, a material having a thermal conductivity of 200 W / (m · K) or more is desirable.

樹脂材が官能基を有しない樹脂で構成される場合には、この接合面に対してＵＶオゾン処理やプラズマ処理などの一般的なドライな表面改質処理を行うことが望ましい。さらには金属材に対しても、接合面に粗さや凹凸の付与することやプラズマ処理などの表面改質処理を施すことが望ましい。   When the resin material is composed of a resin having no functional group, it is desirable to perform general dry surface modification treatment such as UV ozone treatment or plasma treatment on the joint surface. Further, it is desirable that the metal material is subjected to surface modification treatment such as imparting roughness or unevenness to the joint surface and plasma treatment.

レーザ接合及び溶着の条件は、材料のレーザ照射波長における吸収率、熱伝導率を考慮した上で、レーザスポットサイズ、パワー、照射時間、走査速度、加圧力を決定する。レーザ接合に用いる光源は、半導体レーザ、ＹＡＧレーザ、ファイバーレーザ、色素レーザ、ガスレーザ等が利用される。   Laser bonding and welding conditions determine the laser spot size, power, irradiation time, scanning speed, and applied pressure in consideration of the absorption rate and thermal conductivity of the material at the laser irradiation wavelength. As a light source used for laser bonding, a semiconductor laser, a YAG laser, a fiber laser, a dye laser, a gas laser, or the like is used.

以下、本発明の実施例を図面に基づき説明する。   Embodiments of the present invention will be described below with reference to the drawings.

実施例１を説明する。図１は、本実施例の熱可塑性樹脂１−１と金属２のレーザ接合方法の実施例を示す平面図である。熱可塑性樹脂１−１と金属材２を一部重ね合わせ、樹脂が重なっていない金属材２の部分にレーザ光３を照射して、金属材２を加熱して、金属材２と接している部分の熱可塑性樹脂１−１と金属材２を接合することを特徴とする。   Example 1 will be described. FIG. 1 is a plan view showing an embodiment of the laser joining method of the thermoplastic resin 1-1 and the metal 2 of this embodiment. The thermoplastic resin 1-1 and the metal material 2 are partially overlapped, and the portion of the metal material 2 where the resin is not overlapped is irradiated with the laser beam 3 to heat the metal material 2 and come into contact with the metal material 2. A portion of the thermoplastic resin 1-1 and the metal material 2 are joined.

金属材２のレーザ光３の照射部分は、熱可塑性樹脂１−１が重なっていない金属材２のみの部分である。そのため、金属材２については、レーザ光照射によって金属材２を加熱して、伝熱によって熱可塑性樹脂１−１と接合するため、金属材２には銅やアルミなどの熱伝導性の高い金属を使用することが望ましい。また、銅などの金属材は近赤外域の波長のレーザ光の反射率が高いことから、レーザ光照射部分に予め、表面に微小な凹凸を付与することで表面積を大きくして光吸収効率を高めることが有効である。さらに、光吸収性の顔料または塗料をレーザ光照射面に塗布することも有効である。   The irradiated portion of the metal material 2 with the laser beam 3 is a portion of only the metal material 2 on which the thermoplastic resin 1-1 does not overlap. Therefore, since the metal material 2 is heated by laser light irradiation and joined to the thermoplastic resin 1-1 by heat transfer, the metal material 2 has a metal having high thermal conductivity such as copper or aluminum. It is desirable to use In addition, since metal materials such as copper have a high reflectance of laser light having a wavelength in the near infrared region, the surface area is increased by providing minute irregularities on the surface of the laser light irradiated portion in advance to increase the light absorption efficiency. It is effective to increase. It is also effective to apply a light-absorbing pigment or paint to the laser light irradiation surface.

熱可塑性樹脂１−１と金属材２は、互いに重ね合わせた部分の１点を加圧して固定し、熱可塑性樹脂１−１の重なっていない金属材２に対してレーザ光を照射することにより接合が可能である。また、本実施例では熱可塑性樹脂１−１の光透過性及びレーザ光の入射方向に依存せず、レーザ接合に用いることができる。そのため、熱可塑性樹脂１−１には、非透光性のものを用いることができるし、熱可塑性樹脂１−１と金属材２を加圧する加圧材にも、非透光性のものを用いることができる。さらに、図２に示すように水平方向からレーザ光を金属材２に対して入射することによっても接合が可能である。熱可塑性樹脂１−１の接合部と照射部分の距離が２０ｍｍ以下で、金属材２の厚みが３ｍｍ以上であることが望ましい。また、レーザ光の照射面に対する入射角度は特に限定しない。   The thermoplastic resin 1-1 and the metal material 2 are fixed by pressurizing one point of the overlapped portion, and irradiating the metal material 2 on which the thermoplastic resin 1-1 is not overlapped with the laser beam. Joining is possible. Further, in this embodiment, it can be used for laser bonding without depending on the light transmittance of the thermoplastic resin 1-1 and the incident direction of the laser beam. Therefore, the non-translucent thing can be used for the thermoplastic resin 1-1, and the non-translucent thing is also used for the pressurizing material which pressurizes the thermoplastic resin 1-1 and the metal material 2. Can be used. Further, as shown in FIG. 2, bonding can also be performed by making laser light incident on the metal material 2 from the horizontal direction. It is desirable that the distance between the bonded portion of the thermoplastic resin 1-1 and the irradiated portion is 20 mm or less and the thickness of the metal material 2 is 3 mm or more. Moreover, the incident angle with respect to the irradiation surface of a laser beam is not specifically limited.

実施例２について説明する。図３は、本実施例の第１の熱可塑性樹脂１−１と第２の熱可塑性樹脂１−２と金属材２のレーザ接合方法の実施例を示す平面図である。第１の熱可塑性樹脂１−１と第２の熱可塑性樹脂１−２の間に金属材２を挟み、レーザ光照射により、一括して２箇所を接合する点が実施例１とは異なり、他の点は同様である。   Example 2 will be described. FIG. 3 is a plan view showing an embodiment of a laser joining method of the first thermoplastic resin 1-1, the second thermoplastic resin 1-2, and the metal material 2 according to the present embodiment. Unlike the first embodiment, the metal material 2 is sandwiched between the first thermoplastic resin 1-1 and the second thermoplastic resin 1-2, and the two locations are joined together by laser light irradiation. The other points are the same.

本実施例では、第１の熱可塑性樹脂１−１と第２の熱可塑性樹脂１−２の間に、レーザ光３を照射する部分がはみ出るように金属材２を挟み、接合部分を加圧して固定する。そして、はみ出した金属部分に対してレーザ光３を照射して金属材２を加熱し、金属材２に接する第１の熱可塑性樹脂１−１と第２の熱可塑性樹脂１−２を同時に接合することが可能である。   In this embodiment, the metal material 2 is sandwiched between the first thermoplastic resin 1-1 and the second thermoplastic resin 1-2 so that the portion irradiated with the laser beam 3 protrudes, and the joining portion is pressurized. And fix. Then, the protruding metal part is irradiated with the laser beam 3 to heat the metal material 2, and the first thermoplastic resin 1-1 and the second thermoplastic resin 1-2 in contact with the metal material 2 are simultaneously bonded. Is possible.

レーザ光を入射する方向とその反対側の金属材２の表面温度は、レーザ光照射面及び照射部分から近い方が高温となるため、第１の熱可塑性樹脂１−１と第２の熱可塑性樹脂１−２の接合具合に違いが生じる。そこで、金属材２の表面温度が高温になるレーザ光３の入射側に用いる第１の熱可塑性樹脂１−１は、反対側の第２の熱可塑性樹脂１−２よりも融点もしくは熱伝導率の高いものを用いることによって、均一な接合を図ることができる。   The surface temperature of the metal material 2 opposite to the direction in which the laser beam is incident is higher near the laser beam irradiation surface and the irradiated portion, and therefore the first thermoplastic resin 1-1 and the second thermoplastic resin. A difference occurs in the joining condition of the resin 1-2. Therefore, the first thermoplastic resin 1-1 used on the incident side of the laser beam 3 where the surface temperature of the metal material 2 is high is higher in melting point or thermal conductivity than the second thermoplastic resin 1-2 on the opposite side. By using a material having a high thickness, uniform bonding can be achieved.

本実施例によれば、２つの熱可塑性樹脂と金属材の接合部を同時に形成することができるため、樹脂と金属の複合体を設計、製造する工程において非常に有用である。樹脂製の筐体を用いる製品では、筐体部分の部品を２つに分かれることが多く、これらを接合して封止する場合が多い。そのため、筐体の樹脂材間に金属材を挟み、この金属材に対してレーザ光を照射して接合することで筐体を封止することが可能になる。内部に電子部品等が存在する場合においても、照射部分の金属材を局所的に急速に加熱しているため、内部に影響を与えずに、接合することが可能であることから、電子機器や自動車製品などの分野において、極めて有用である。特に、本実施例は、熱可塑性樹脂としては光吸収性の樹脂材料に適用可能であるため、炭素繊維強化プラスチック（ＣＦＲＰ）などに対して有効である。ＣＦＲＰは高い強度と軽さを併せ持つ材料であり、様々な用途に用いられているが、炭素繊維を含んでおり、黒色であるためＣＦＲＰ同士を直接レーザ接合することは困難である。本実施例によれば、金属材を介してＣＦＲＰを一括で同時にレーザ接合が可能であり、非常に有用である。   According to the present embodiment, since a joint portion between two thermoplastic resins and a metal material can be formed at the same time, it is very useful in the process of designing and manufacturing a composite of resin and metal. In a product using a resin casing, the casing part is often divided into two parts, which are often joined and sealed. Therefore, it is possible to seal the housing by sandwiching a metal material between the resin materials of the housing and irradiating the metal material with laser light and joining them. Even when there are electronic parts, etc. inside, because the metal material of the irradiated part is heated locally and rapidly, it can be joined without affecting the inside. It is extremely useful in fields such as automobile products. In particular, since the present embodiment can be applied to a light-absorbing resin material as a thermoplastic resin, it is effective for carbon fiber reinforced plastic (CFRP) and the like. CFRP is a material having both high strength and lightness, and is used in various applications. However, since it contains carbon fiber and is black, it is difficult to directly laser bond CFRP to each other. According to the present embodiment, CFRP can be laser-bonded simultaneously and simultaneously through a metal material, which is very useful.

実施例３について説明する。図４は、本実施例の第１の熱可塑性樹脂１−１と第２の熱可塑性樹脂１−２と金属材２のレーザ接合方法の実施例を示す平面図である。高さが揃った第１の熱可塑性樹脂１−１と第２の熱可塑性樹脂１−２の上に金属材２を乗せて、レーザ光照射による接合を行う点が実施例２とは異なり、他の点は同様である。   Example 3 will be described. FIG. 4 is a plan view showing an embodiment of a laser joining method of the first thermoplastic resin 1-1, the second thermoplastic resin 1-2, and the metal material 2 according to the present embodiment. Unlike the second embodiment, the metal material 2 is placed on the first thermoplastic resin 1-1 and the second thermoplastic resin 1-2 having the same height, and is joined by laser light irradiation. The other points are the same.

第１の熱可塑性樹脂１−１と第２の熱可塑性樹脂１−２を突き合わせた状態で、金属材２を乗せて加圧して固定し、レーザ光を照射して金属材２を加熱して接合する。このとき、レーザ光を照射する部分は、熱可塑性樹脂同士の突合せ位置に合わせることが望ましい。ずなわち、熱可塑性樹脂同士が接触している位置における金属材の反対面にレーザ照射するとよい。これによって、第１の熱可塑性樹脂１−１と金属材２との接合部分及び第２の熱可塑性樹脂１−２と金属材２との接合部分が均一に得られる。さらには、金属材２の表面付近では、第１の熱可塑性樹脂１−１と第２の熱可塑性樹脂１−２とが溶融し、これらが直接接合している。本構成では、熱可塑性樹脂同士の突き合わせ接合と似た接合体が得られ、熱可塑性樹脂同士の突き合わせ接合では、加圧しながらの接合が難しいことが多く、接合面積を確保することが難しい。したがって、金属材を介して２つの熱可塑性樹脂を接合することで容易に熱可塑性樹脂同士の突き合わせ接合と類似の接合が可能である。さらに、突き合わせ接合に比べて、金属材の大きさやレーザ光の照射面積を広げることによって接合面積を得ることが容易である。また、２つの熱可塑性樹脂の配置がレーザ光の照射幅以上の間隔がある場合、熱可塑性樹脂側からレーザ光を照射して接合することも可能である。   In a state where the first thermoplastic resin 1-1 and the second thermoplastic resin 1-2 are abutted together, the metal material 2 is placed and pressed and fixed, and the metal material 2 is heated by irradiating a laser beam. Join. At this time, it is desirable to match the portion irradiated with the laser light at the butting position between the thermoplastic resins. In other words, laser irradiation may be performed on the opposite surface of the metal material at the position where the thermoplastic resins are in contact with each other. Thereby, the joining part of the 1st thermoplastic resin 1-1 and the metal material 2 and the joining part of the 2nd thermoplastic resin 1-2 and the metal material 2 are obtained uniformly. Furthermore, in the vicinity of the surface of the metal material 2, the first thermoplastic resin 1-1 and the second thermoplastic resin 1-2 are melted and are directly joined. In this configuration, a joined body similar to the butt joining of thermoplastic resins is obtained. In the butt joining of thermoplastic resins, joining while applying pressure is often difficult, and it is difficult to secure a joining area. Therefore, by joining two thermoplastic resins through a metal material, joining similar to butt joining of thermoplastic resins can be easily performed. Furthermore, it is easy to obtain the bonding area by expanding the size of the metal material and the irradiation area of the laser beam as compared with the butt bonding. Further, when the two thermoplastic resins are arranged at an interval equal to or longer than the irradiation width of the laser light, it is also possible to join by irradiating the laser light from the thermoplastic resin side.

実施例４について説明する。図５及び図６は、本実施例の３つ以上の熱可塑性樹脂と金属材２のレーザ接合方法の実施例を示す平面図である。第３の熱可塑性樹脂１−３と第４の熱可塑性樹脂１−４の上に金属材２を乗せ、この金属材２の上に第１の熱可塑性樹脂１−１と第２の熱可塑性樹脂１−２を乗せて、その間にレーザを照射してレーザ光照射による接合を行う点が実施例１とは異なり、他の点は同様である。   Example 4 will be described. 5 and 6 are plan views showing an embodiment of a laser joining method of three or more thermoplastic resins and the metal material 2 according to the present embodiment. A metal material 2 is placed on the third thermoplastic resin 1-3 and the fourth thermoplastic resin 1-4, and the first thermoplastic resin 1-1 and the second thermoplastic resin are placed on the metal material 2. Unlike the first embodiment, the resin 1-2 is placed, and a laser beam is irradiated between them to perform bonding by laser light irradiation. The other points are the same.

図５では、金属材のレーザ照射する面とは反対面には、一つの熱可塑性樹脂１−３を接合し、図６では、二つの熱可塑性樹脂１−３、１―４を接合するものである。図６の場合には、熱可塑性樹脂同士の突き合わせ位置に対応する位置にレーザ照射する。   In FIG. 5, one thermoplastic resin 1-3 is joined to the surface opposite to the laser-irradiated surface of the metal material, and in FIG. 6, two thermoplastic resins 1-3, 1-4 are joined. It is. In the case of FIG. 6, laser irradiation is performed at a position corresponding to the abutting position between the thermoplastic resins.

本構成では、３つまたは４つの熱可塑性樹脂を１つの金属材２を介して同時に接合が可能である。金属材２の下面と上面にそれぞれ熱可塑性樹脂と接触するように加圧して固定し、第１の熱可塑性樹脂１−１と第２の熱可塑性樹脂１−２の隙間から金属材２に対して直接レーザ光を照射する。これにより、金属材２が急速に加熱され、接触している熱可塑性樹脂が金属材２を介して接合される。このとき、レーザ光を照射する部分に近いほど金属材２が高温となるため、照射部分に近い第１の熱可塑性樹脂１−１と第２の熱可塑性樹脂１−２ほど、他方の第３の熱可塑性樹脂１−３と第４の熱可塑性樹脂１−４に比べてその融点もしくは熱伝導率が高いことが望ましい。   In this configuration, three or four thermoplastic resins can be bonded simultaneously via one metal material 2. The metal material 2 is pressed and fixed to the lower surface and the upper surface of the metal material 2 so as to be in contact with the thermoplastic resin, respectively, and is applied to the metal material 2 from the gap between the first thermoplastic resin 1-1 and the second thermoplastic resin 1-2. Direct laser irradiation. Thereby, the metal material 2 is heated rapidly and the thermoplastic resin which is in contact is joined through the metal material 2. At this time, since the metal material 2 has a higher temperature as it is closer to the portion to be irradiated with the laser beam, the first thermoplastic resin 1-1 and the second thermoplastic resin 1-2 that are closer to the irradiated portion are the other third. It is desirable that the melting point or the thermal conductivity is higher than those of the thermoplastic resin 1-3 and the fourth thermoplastic resin 1-4.

実施例５について説明する。図７及び図８は、本実施例の第１の熱可塑性樹脂１−１と第２の熱可塑性樹脂１−２と金属材２のレーザ接合方法の実施例を示す平面図である。第１の熱可塑性樹脂１−１と第２の熱可塑性樹脂１−２の一方または両方の構造が金属材２に合わせた形状である点が実施例２とは異なり、他の点は同様である。   Example 5 will be described. 7 and 8 are plan views showing an embodiment of the laser joining method of the first thermoplastic resin 1-1, the second thermoplastic resin 1-2, and the metal material 2 of the present embodiment. Unlike Example 2, the structure of one or both of the first thermoplastic resin 1-1 and the second thermoplastic resin 1-2 is a shape that matches the metal material 2, and the other points are the same. is there.

本構成では、第１の熱可塑性樹脂１−１と第２の熱可塑性樹脂１−２を合わせたときの形状がコの字型になり、その間に金属材２を挟み込む構造で、金属材２にレーザ光を照射して接合する。これにより、第１の熱可塑性樹脂１−１と金属材２とが接合し、第２の熱可塑性樹脂１−２と金属材２とが接合するとともに、第１の熱可塑性樹脂１−１と第２の熱可塑性樹脂１−２とが直接接合する。そして、第１の熱可塑性樹脂１−１と第２の熱可塑性樹脂１−２と金属材２との接合面を増やすことができ、接合性を高めることができる。これによって、例えば図９のように、筐体の構造に本構成を適用した場合、第１の熱可塑性樹脂と第２の熱可塑性樹脂とにより筐体を構成し、筐体内部の封止性を高めることが可能である。このように、レーザ照射部分以外の金属部分が第１の熱可塑性樹脂１−１と第２の熱可塑性樹脂１−２で覆われる形状にしたことにより、電子部品の筐体で内部にリード線などが存在したときにもその絶縁性を高めることが可能である。   In this structure, the shape when the first thermoplastic resin 1-1 and the second thermoplastic resin 1-2 are combined is a U-shape, and the metal material 2 is sandwiched between the metal material 2 and the metal material 2 Are bonded by laser irradiation. As a result, the first thermoplastic resin 1-1 and the metal material 2 are joined, the second thermoplastic resin 1-2 and the metal material 2 are joined, and the first thermoplastic resin 1-1 and The second thermoplastic resin 1-2 is directly bonded. And the joining surface of the 1st thermoplastic resin 1-1, the 2nd thermoplastic resin 1-2, and the metal material 2 can be increased, and joining property can be improved. Thus, for example, as shown in FIG. 9, when this configuration is applied to the structure of the casing, the casing is constituted by the first thermoplastic resin and the second thermoplastic resin, and the sealing performance inside the casing is determined. It is possible to increase. As described above, the metal part other than the laser irradiation part is covered with the first thermoplastic resin 1-1 and the second thermoplastic resin 1-2, so that the lead wire is internally provided in the casing of the electronic component. It is possible to improve the insulation property even when there is.

図９は、本実施例の第１の熱可塑性樹脂１−１と第２の熱可塑性樹脂１−２と金属材２のレーザ接合方法を用いて、金属材２と電子部品６やリード７の熱可塑性樹脂製の筐体に適用するときの一例を示す模式図である。実施例のいずれかの方法によって、第１の熱可塑性樹脂１−１と第２の熱可塑性樹脂１−２と金属材２を接合する。本構造を適用できる対象部は、電子部品の筐体のみではなく、電子制御ユニット（ＥＣＵ）、エアフローセンサ、コネクタなどの製品及びレーザ接合できるすべての製品に有効である。   FIG. 9 shows the metal material 2, the electronic component 6, and the lead 7 using the laser joining method of the first thermoplastic resin 1-1, the second thermoplastic resin 1-2, and the metal material 2 of this embodiment. It is a schematic diagram which shows an example when applying to the housing | casing made from a thermoplastic resin. The 1st thermoplastic resin 1-1, the 2nd thermoplastic resin 1-2, and the metal material 2 are joined by the method in any one of an Example. Target parts to which this structure can be applied are effective not only for electronic component housings but also for products such as electronic control units (ECUs), airflow sensors, connectors, and all products that can be laser-bonded.

実施例６について説明する。図１０は、本実施例の第１の熱可塑性樹脂１−１と第２の熱可塑性樹脂１−２と金属材２のレーザ接合方法の実施例を示す平面図である。金属材２の断面形状が円形であり、レーザ光の入射方向が実施例２とは異なり、他の点は同様である。   Example 6 will be described. FIG. 10 is a plan view showing an embodiment of a laser joining method of the first thermoplastic resin 1-1, the second thermoplastic resin 1-2, and the metal material 2 according to the present embodiment. The cross-sectional shape of the metal material 2 is circular, and the incident direction of the laser beam is different from that of the second embodiment, and the other points are the same.

金属材２の断面形状を円形にすることによって、第１の熱可塑性樹脂１−１及び第２の熱可塑性樹脂１−２と線（断面においては点）で接触するため接合幅を小さくし、レーザ光照射による伝熱を均一にすることが可能である。したがって、精密に接合を行いたい場合などに有効である。さらに、金属材２が熱可塑性樹脂に接触する幅が金属材の幅よりも小さければ、金属材２の断面形状は三角形、星型などの多角形でも可能である。   By making the cross-sectional shape of the metal material 2 circular, the bonding width is reduced because the first thermoplastic resin 1-1 and the second thermoplastic resin 1-2 are in contact with a line (a point in the cross section), It is possible to make the heat transfer by laser light irradiation uniform. Therefore, it is effective when, for example, precise bonding is desired. Further, if the width of the metal material 2 contacting the thermoplastic resin is smaller than the width of the metal material, the metal material 2 may have a polygonal shape such as a triangle or a star shape.

なお、本発明は上記した実施例に限定されるものではなく、様々な変形例が含まれる。例えば、上記した実施例は本発明を分かりやすく説明するために詳細に説明したものであり、必ずしも説明した全ての構成を備えるものに限定されるものではない。また、ある実施例の構成の一部を他の実施例の構成に置き換えることが可能であり、また、ある実施例の構成に他の実施例の構成を加えることも可能である。また、各実施例の構成の一部について、他の構成の追加・削除・置換することが可能である。   In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

１−１ 第１の熱可塑性樹脂
１−２ 第２の熱可塑性樹脂
１−３ 第３の熱可塑性樹脂
１−４ 第４の熱可塑性樹脂
２ 金属材
３ レーザ光
４ 加圧
５ 接合面
６ 電子部品
７ リード線 1-1 1st thermoplastic resin 1-2 2nd thermoplastic resin 1-3 3rd thermoplastic resin 1-4 4th thermoplastic resin 2 Metal material 3 Laser beam 4 Pressure 5 Bonding surface 6 Electron Part 7 Lead wire

Claims (10)

熱可塑性樹脂と金属または無機材料である被接合材とを接触させ、
前記熱可塑性樹脂を通さずに前記金属材にレーザ光を照射することによって前記被接合材及び前記熱可塑性樹脂を加熱し、前記熱可塑性樹脂と前記被接合材を接合することを特徴とするレーザ接合方法。 A thermoplastic resin and a metal or inorganic material to be joined are brought into contact;
A laser characterized in that the metal material is irradiated with laser light without passing through the thermoplastic resin to heat the material to be joined and the thermoplastic resin, thereby joining the thermoplastic resin and the material to be joined. Joining method. 請求項１において、
前記熱可塑性樹脂と前記被接合材との接触位置を加熱しながら接合することを特徴とするレーザ接合方法。 In claim 1,
A laser joining method comprising joining while heating a contact position between the thermoplastic resin and the material to be joined. 請求項１または２において、
前記熱可塑性樹脂は、第１の熱可塑性樹脂と第２の熱可塑性樹脂含み、
前記被接合材に第１及び第２の熱可塑性樹脂が接触した状態で接合することを特徴とするレーザ接合方法。 In claim 1 or 2,
The thermoplastic resin includes a first thermoplastic resin and a second thermoplastic resin,
A laser bonding method, wherein the first and second thermoplastic resins are bonded to the material to be bonded. 請求項３において、
前記第１の熱可塑性樹脂は、前記第２の熱可塑性樹脂よりもその融点またはガラス転位温度（Ｔｇ）が高く、前記第２の熱可塑性樹脂よりも前記被接合材の近い位置にレーザ光を照射することによって接合されることを特徴とするレーザ接合方法。 In claim 3,
The first thermoplastic resin has a melting point or glass transition temperature (Tg) higher than that of the second thermoplastic resin, and emits laser light closer to the material to be joined than the second thermoplastic resin. A laser bonding method comprising bonding by irradiation. 請求項３において、
前記第１の熱可塑性樹脂は、前記第２の熱可塑性樹脂に接して前記金属に接合されるとともに、前記第１の熱可塑性樹脂が、前記第２の熱可塑性樹脂に接合されることを特徴とするレーザ接合方法。 In claim 3,
The first thermoplastic resin is bonded to the metal in contact with the second thermoplastic resin, and the first thermoplastic resin is bonded to the second thermoplastic resin. Laser joining method. 請求項５において、
前記被接合材は板状であり、
前記第１及び前記第２の熱可塑性樹脂は、前記板状の被接合材の一主面に接触しており、
前記レーザ光は、前記被接合材の一主面上で前記第１の熱可塑性樹脂と前記第２の熱可塑性樹脂とが接している位置に対応する反対面の位置に照射されることを特徴とするレーザ接合方法。 In claim 5,
The material to be joined is plate-shaped,
The first and second thermoplastic resins are in contact with one main surface of the plate-shaped workpiece,
The laser beam is applied to a position on an opposite surface corresponding to a position where the first thermoplastic resin and the second thermoplastic resin are in contact with each other on one main surface of the bonded material. Laser joining method. 請求項３乃至６のいずれかにおいて、
前記被接合材は板状であり、
前記第１及び前記第２の熱可塑性樹脂は、前記板状の被接合材の一主面に接触しており、
前記レーザ光は、前記被接合材の一主面の前記第１の熱可塑性樹脂と前記第２の熱可塑性樹脂との間の領域に照射されることを特徴とするレーザ接合方法。 In any one of Claims 3 thru | or 6.
The material to be joined is plate-shaped,
The first and second thermoplastic resins are in contact with one main surface of the plate-shaped workpiece,
The laser beam irradiation method irradiates a region between the first thermoplastic resin and the second thermoplastic resin on one main surface of the material to be bonded. 請求項７において、
前記被接合材の前記一主面とは反対面に、第三の熱可塑性樹脂が接触し、前記レーザ照射により接合されることを特徴とするレーザ接合方法。 In claim 7,
A laser joining method, wherein a third thermoplastic resin is brought into contact with a surface opposite to the one main surface of the material to be joined, and is joined by the laser irradiation. 請求項５において、
前記第１の熱可塑性樹脂と前記第２の熱可塑性樹脂との間に前記被接合材が設けられているとともに、前記第１の熱可塑性樹脂と前記第２の熱可塑性樹脂とが前記被接合材上で接しており互いに接合されることを特徴とするレーザ接合方法。 In claim 5,
The material to be joined is provided between the first thermoplastic resin and the second thermoplastic resin, and the first thermoplastic resin and the second thermoplastic resin are joined to each other. A laser bonding method characterized by being in contact with each other and being bonded to each other. 請求項３において、
前記被接合材を前記第１の熱可塑性樹脂と前記第２の熱可塑性樹脂との間に設け、前記被接合材の前記第１の熱可塑性樹脂と前記第２の熱可塑性樹脂との間の部分に前記レーザを照射することを特徴とするレーザ接合方法。 In claim 3,
The material to be joined is provided between the first thermoplastic resin and the second thermoplastic resin, and between the first thermoplastic resin and the second thermoplastic resin of the material to be joined. A laser bonding method characterized by irradiating a portion with the laser.
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