JP3753024B2 - Butt laser welding method - Google Patents

Butt laser welding method Download PDF

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Publication number
JP3753024B2
JP3753024B2 JP2001207303A JP2001207303A JP3753024B2 JP 3753024 B2 JP3753024 B2 JP 3753024B2 JP 2001207303 A JP2001207303 A JP 2001207303A JP 2001207303 A JP2001207303 A JP 2001207303A JP 3753024 B2 JP3753024 B2 JP 3753024B2
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JP
Japan
Prior art keywords
press
resin material
laser welding
welding method
exterior
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Expired - Fee Related
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JP2001207303A
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Japanese (ja)
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JP2003019752A (en
Inventor
正彦 井本
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Denso Corp
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Denso Corp
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Priority to JP2001207303A priority Critical patent/JP3753024B2/en
Publication of JP2003019752A publication Critical patent/JP2003019752A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/565—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits involving interference fits, e.g. force-fits or press-fits
    • 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
    • B29C65/72—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by combined operations or combined techniques, e.g. welding and stitching
    • 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
    • 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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    • B29C66/114—Single butt joints
    • 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
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    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2424—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain
    • B29C66/24243—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral
    • B29C66/24244—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral forming a rectangle
    • B29C66/24245—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral forming a rectangle forming a square
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—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
    • 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
    • B29C66/50—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
    • B29C66/65—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 with a relative motion between the article and the welding tool
    • B29C66/652—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 with a relative motion between the article and the welding tool moving the welding tool around the fixed article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
    • B29C65/1619—Mid infrared radiation [MIR], e.g. by CO or CO2 lasers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/567—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits using a tamping or a swaging operation, i.e. at least partially deforming the edge or the rim of a first part to be joined to clamp a second part to be joined
    • B29C65/568—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits using a tamping or a swaging operation, i.e. at least partially deforming the edge or the rim of a first part to be joined to clamp a second part to be joined using a swaging operation, i.e. totally deforming the edge or the rim of a first part to be joined to clamp a second part to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
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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
    • 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
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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
    • B29C66/1224—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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2422—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical
    • B29C66/24225—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical being elliptical
    • 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
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
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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
    • B29C66/70—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
    • B29C66/71—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 composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
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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
    • B29C66/80—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
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    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages

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

Description

【０００１】
【発明の属する技術分野】
本発明は、樹脂材で成形された２部品の突き合わせ部に向かってレーザー光を照射して溶着固定するようにした突き合わせレーザー溶着方法に関するものである。
【０００２】
【従来の技術】
従来より、樹脂部品の固定方法としては、図７に示したように、開口部１０１を有する有底筒状の外装部品１０２内に内装部品１０３を挿入し、外装部品１０２のかしめ代（固定代）１０４を熱かしめすることで、樹脂材で成形された２部品を固定する熱かしめ固定方法が知られている。また、図８に示したように、有底筒状の外装部品１０２の開口部１０１に内装部品１０３を挿入して溶着固定したい合わせ面同士を高さ方向に重ね合わせ、外装部品１０２と内装部品１０３との重ね合わせ部１０６にレーザー光を照射することで、樹脂材で成形された２部品を溶着固定する重ね合わせレーザー溶着方法が知られている。なお、この重ね合わせレーザー溶着方法においては、外装部品１０２と内装部品１０３との重ね合わせ部１０６の隙間をなくすために加圧専用装置１０５を必要としている。
【０００３】
【発明が解決しようとする課題】
ところが、従来の樹脂部品の熱かしめ固定方法においては、外装部品１０２の幅方向寸法（ｗ）がサイズアップすることはないが、外装部品１０２の開口部１０１側の熱かしめ部に必ずかしめ代１０４を設ける必要があり、そのかしめ代１０４の板厚分だけ高さ方向寸法がサイズアップ（ｈ＜ｈ’）となるという問題が生じていた。一方、従来の重ね合わせレーザー溶着方法においては、外装部品１０２と内装部品１０３とを重ね合わせ、外装部品１０２と内装部品１０３との重ね合わせ部１０６にレーザー光を照射して溶着固定している。
【０００４】
この従来の重ね合わせレーザー溶着方法では、外装部品１０２の高さ方向寸法（ｈ）がサイズアップすることはないが、重ね合わせ代を設ける必要があり、幅方向寸法がサイズアップ（ｗ＜ｗ’）となるという問題が生じていた。また、外装部品１０２と内装部品１０３とを重ね合わせた後に、レーザー溶着方法を用いて溶着固定する場合には、重ね合わせ部１０６の合わせ面に所定値以上の高さ方向の隙間が生じると、外装部品１０２と内装部品１０３とを確実に溶着固定できないため、加圧専用装置１０５を用いて加圧して合わせ面に隙間が生じないようにする必要があった。したがって、加圧専用装置１０５が必要となり、組付コストが高くなるという問題が生じていた。
【０００５】
【発明の目的】
本発明は、サイズアップを防止するためにかしめ代または重ね合わせ代を設けることなく、また、組付コストを減少するために加圧専用装置を廃止することのできる突き合わせレーザー溶着方法の提供を目的とする。
【０００６】
【課題を解決するための手段】
請求項１に記載の発明によれば、樹脂材で成形された容器形状の外装部品および樹脂材で成形された内装部品よりなる２部品の溶着固定したい面（外装部品の開口部側の圧入面、内装部品の圧入面）を圧入寸法形状（全周圧入形状）とする。
先ず、２部品の圧入固定工程では、樹脂材で成形された外装部品の開口部に、樹脂材で成形された内装部品を圧入して外装部品および内装部品よりなる２部品の溶着固定したい面同士を突き合わせる。すなわち、外装部品の開口部側の圧入面に、内装部品の圧入面を圧入することで、外装部品の開口部側の圧入面に内装部品の圧入面を突き合わせる。このとき、外装部品の開口部側の弾性変形力によって、外装部品の開口部側の圧入面に内装部品の圧入面が突き合わせ状態で、外装部品内に内装部品が仮固定される。
次に、レーザー溶着固定工程では、外装部品の開口部側の圧入面および内装部品の圧入面よりなる２部品の突き合わせ部に向かってレーザー光を照射することで、外装部品の開口部側の圧入面に内装部品の圧入面を溶着固定する。これにより、外装部品および内装部品よりなる２部品の突き合わせレーザー溶着を行うことができる。
また、外装部品および内装部品よりなる２部品の溶着固定したい面（外装部品の開口部側の圧入面、内装部品の圧入面）を圧入寸法形状（全周圧入形状）とすることにより、従来の重ね合わせレーザー溶着方法では必要であった、樹脂材よりなる２部品の合わせ面の隙間をなくすための加圧専用装置を無用とすることができる。
また、従来の技術では必要であった、かしめ代（固定代）または重ね合わせ代を設ける必要がなく、部品の高さ方向寸法や幅方向寸法のサイズアップを防止することができる。
【０００７】
請求項２ないし請求項４に記載の発明によれば、内装部品側より２部品の突き合わせ部に向かってレーザー光を当てると、内装部品には所定値以上の透過率を持たせているため、レーザー光は、内装部品を透過していき外装部品の開口部側の圧入面にまでレーザー光が到達する。そして、レーザー光が外装部品に到達すると、外装部品には所定値以下の透過率を持たせているため、レーザー光を吸収し発熱が起こり溶け出す。この外装部品の開口部側の圧入面に発生した発熱が、外装部品と接している内装部品の圧入面へも伝わり、内装部品の圧入面も溶け出す。発熱が収まると、溶け出した部分が再凝固を行い、２部品の溶着固定したい面が溶着固定される。
請求項５に記載の発明によれば、２部品の圧入固定工程で、外装部品の開口部側の圧入面に、内装部品の蓋体部の圧入面を圧入する際に、内装部品は、有底筒状の外装部品の底壁部に突起部が当接するまで圧入されて位置決めされるので、内装部品の蓋体部の圧入面の高さ方向の位置は外装部品の側壁部の高さ方向に対して常に一定となる。
【０００８】
【発明の実施の形態】
［実施例の構成］
発明の実施の形態を実施例に基づき図面を参照して説明する。ここで、図１は自動車等の車両に搭載される機能部品の主要部を示した図で、図２は機能部品の概略構成を示した図である。
【０００９】
本実施例の機能部品は、例えば自動車等の車両が物体に衝突したことを検知する衝突検知センサ等のセンサ部品であり、第１樹脂材により一体成形された第１樹脂成形品である樹脂ケース１と、第２樹脂材により一体成形された第２樹脂成形品であるベース２と、樹脂ケース１とベース２との間に形成される内部空間３に収容された電気部品または電子部品（図示せず）とから構成され、レーザー光を照射することで樹脂ケース１およびベース２よりなる樹脂材の２部品をレーザー溶着固定している。なお、レーザー溶着固定とは、高エネルギー密度に集光された単一波長のビームを利用して樹脂材よりなる２部品を溶着固定する溶着固定方法で、半導体レーザーやＹＡＧレーザーやＣＯ2 レーザー等のレーザー発振器からのレーザー光（レーザービーム）を使用する。
【００１０】
樹脂ケース１は、本発明の外装部品に相当するもので、例えば熱可塑性ポリエステル樹脂（ＰＢＴ）または熱可塑性ポリアミド樹脂（ＰＡ）等の第１樹脂材により容器形状（有底筒状）に一体成形された第１樹脂部品である。この樹脂ケース１は、高さ方向寸法がｈで、且つ幅方向寸法がｗの有底筒状に形成されて、角筒状の側壁部１１の一端側に矩形状または方形状の開口部１２を有し、且つ側壁部１１の他端に矩形状または方形状の底壁部１３を有している。なお、樹脂ケース１の側壁部１１の開口部１２側の内壁面には、ベース２を溶着固定するための角筒状の圧入面（突き合わせ部）１４が設けられている。
【００１１】
ベース２は、例えば熱可塑性ポリエステル樹脂（ＰＢＴ）または熱可塑性ポリアミド樹脂（ＰＡ）等の第２樹脂材により一体成形された第２樹脂部品である。このベース２は、樹脂ケース１の開口部１２側の圧入面１４に圧入される矩形状または方形状の蓋体部２１、およびこの蓋体部２１の内側面より図示下方に延長されて樹脂ケース１の底壁部１３の底壁面に当接する突起部２２を有している。なお、ベース２の蓋体部２１の外周面には、樹脂ケース１の圧入面１４に突き合わせられて溶着固定される角筒状の圧入面（突き合わせ部）２４が設けられている。
【００１２】
［実施例の突き合わせレーザー溶着方法］
次に、本実施例の突き合わせレーザー溶着方法を図１ないし図４に基づいて簡単に説明する。ここで、図３および図４は突き合わせレーザー溶着方法の一例を示した図である。
【００１３】
ここで、本実施例では、樹脂ケース１およびベース２よりなる２部品の溶着固定したい面（樹脂ケース１の側壁部１１の開口部１２側の圧入面１４、ベース２の蓋体部２１の圧入面２４）を圧入寸法形状（全周圧入形状）としている。例えば樹脂ケース１の圧入面１４のうちの一面の幅方向寸法をｌ’とし、ベース２の圧入面２４のうちの一面の幅方向寸法をｌとしたときに、ｌ’≦ｌの関係となるように設けられている。また、樹脂ケース１の第１樹脂材とベース２の第２樹脂材には、それぞれ異なる透過率（レーザー光の透過度合）を持たせているため、レーザー光がベース２の第２樹脂材を透過していき、樹脂ケース１の第１樹脂材にまでレーザー光が到達する構造としている。
【００１４】
先ず、２部品の圧入固定工程では、作業者が、図２に示したように、容器形状（有底筒状）の樹脂ケース１の側壁部１１の開口部１２側の角筒状の圧入面１４に、第２樹脂材よりなるベース２の矩形状または方形状の蓋体部２１の角筒状の圧入面２４を圧入する。このとき、樹脂ケース１の側壁部１１の一端側の弾性変形力によって、樹脂ケース１の圧入面１４にベース２の圧入面２４が突き合わせ状態で、樹脂ケース１内にベース２が仮固定される。また、ベース２は、樹脂ケース１の底壁部１３の底壁面に突起部２２が当接するまで圧入されて位置決めされるので、ベース２の圧入面２４の高さ方向の位置は側壁部１１の高さ方向に対して常に一定となる。
【００１５】
次に、レーザー溶着固定工程では、図３および図４に示したように、圧入面１４に向かってレーザー光（レーザービーム）を、圧入面１４の図示下端から図示上端に至るまで斜めから照射（レーザー照射）し、これを樹脂ケース１の角筒状の側壁部１１の角筒状の圧入面１４（ベース２の蓋体部２１の角筒状の圧入面２４）の全周に渡って行うことで、樹脂ケース１およびベース２よりなる樹脂材の２部品の突き合わせレーザー溶着を行う。このとき、樹脂ケース１とベース２の樹脂材には、それぞれ異なる透過率を持たせている。ベース２の蓋体部２１の図示上端面の外周側縁よりレーザー光を当てると、ベース２を構成する第２樹脂材には、第１樹脂材よりも良好な所定値以上の透過率を持たせているため、レーザー光は、ベース２の第２樹脂材を透過していき、樹脂ケース１の開口部１２側の圧入面１４の第１樹脂材にレーザー光が到達する。
【００１６】
そして、レーザー光が樹脂ケース１の開口部１２側の圧入面１４に到達すると、樹脂ケース１を構成する第１樹脂材には、第２樹脂材よりも悪い所定値以下の透過率を持たせているため、レーザー光を吸収し発熱が起こり溶け出す。この発生した発熱が、樹脂ケース１の側壁部１１の圧入面１４と当接しているベース２の蓋体部２１の角筒状の圧入面２４の第２樹脂材へも伝わり、ベース２の第２樹脂材も溶け出す。発熱が収まると、溶け出した部分（図１および図３において図示一点鎖線で囲まれた部分）が再凝固を行う。このレーザー溶着固定工程において、図１に示したように、樹脂ケース１の側壁部１１の開口部１２側の内壁面とベース２の蓋体部２１の外周面との溶着固定がなされる。
【００１７】
［実施例の効果］
以上のように、本実施例の機能部品においては、第１樹脂材により一体成形された樹脂ケース１および第２樹脂材により一体成形されたベース２よりなる２部品の溶着固定したい面（樹脂ケース１の側壁部１１の開口部１２側の圧入面１４、ベース２の蓋体部２１の圧入面２４）を全周圧入形状とすることにより、従来の重ね合わせレーザー溶着方法では必要であった、樹脂材よりなる２部品の合わせ面の隙間をなくすための加圧専用装置を不要とすることができる。
【００１８】
そして、樹脂ケース１の側壁部１１の開口部１２側の角筒状の圧入面１４に、ベース２の蓋体部２１の角筒状の圧入面２４を圧入して、樹脂ケース１の圧入面１４にベース２の圧入面２４を突き合わせた後に、樹脂ケース１の側壁部１１の開口部１２側の圧入面１４に向かってベース２の蓋体部２１の図示上端面の外周側縁よりレーザー光を斜めから照射（レーザー照射）させる突き合わせレーザー溶着方法を行うことにより、樹脂ケース１の側壁部１１の角筒状の圧入面１４およびベース２の蓋体部２１の角筒状の圧入面２４での溶着固定が可能となる。また、従来の技術では必要であった、かしめ代（固定代）または重ね合わせ代を設ける必要がなく、完成品の機能部品の幅方向寸法（ｗ）および高さ方向寸法（ｈ）のサイズアップを防止することができる。
【００１９】
［変形例］
本実施例では、樹脂ケース１を構成する第１樹脂材に、第２樹脂材よりも悪い所定値以下の透過率を持たせ、ベース２の第２樹脂材に、第１樹脂材よりも良好な所定値以上の透過率を持たせて、図３および図４に示したように、樹脂ケース１の側壁部１１の開口部１２側の圧入面１４に向かってベース２の蓋体部２１側よりレーザー光を斜めに当てて樹脂材よりなる２部品の溶着固定を行うようにしているが、樹脂ケース１を構成する第１樹脂材に、第２樹脂材よりも良好な所定値以上の透過率を持たせ、ベース２の第２樹脂材に、第１樹脂材よりも悪い所定値以下の透過率を持たせて、図５および図６に示したように、ベース２の蓋体部２１の外周の圧入面２４に向かって樹脂ケース１の側壁部１１の外壁面側よりレーザー光を斜めまたは水平方向に当てて樹脂材よりなる２部品の溶着固定を行うようにしても良い。
【００２０】
本実施例では、樹脂ケース１およびベース２よりなる２部品の角筒状の圧入面１４、２４同士を突き合わせた後に、圧入面１４に向かってレーザー光を照射して、ベース２の蓋体部２１の外周全体を樹脂ケース１の側壁部１１に溶着固定したが、樹脂材よりなる２部品の溶着固定したい部分のみ部分的に圧入して突き合わせた後に、圧入面に向かってレーザー光を照射して、樹脂材よりなる２部品を部分的に溶着固定するようにしても良い。また、本実施例では、外装部品として容器形状または有底筒状の樹脂ケース１を用いた例を説明したが、外装部品として枠状または底無しの筒状の樹脂成形品を用いても良い。さらに、本実施例では、内装部品として略Ｔ字状の断面を有するベース２を用いた例を説明したが、内装部品として略環板状の樹脂成形品を用いても良い。
【００２１】
本実施例では、樹脂ケース（外装部品）１の開口形状を正方形状とし、ベース２の蓋体部２１（内装部品）の外形形状も正方形状としたが、外装部品の開口形状および内装部品の外形形状として、円形状、楕円形状、三角形状、長方形状、台形状、菱形形状、四角形状または五角形以上の多角形状を用いても良い。また、外装部品の開口形状と内装部品の外形形状との組み合わせも、上記の形状のどの組み合わせを用いても良い。例えば外装部品の開口形状を正方形状または長方形状とし、内装部品の外形形状を円形状または五角形以上の多角形状または長円形状または楕円形状としても良い。あるいは、外装部品の開口形状を円形状または五角形以上の多角形状または長円形状または楕円形状とし、内装部品の外形形状を正方形状または長方形状としても良い。これらの場合には、樹脂材よりなる２部品の溶着固定したい部分のみ部分的に圧入して突き合わせた後に、圧入面に向かってレーザー光を照射して、樹脂材よりなる２部品を部分的に溶着固定される。
【図面の簡単な説明】
【図１】機能部品の主要部を示した断面図である（実施例）。
【図２】機能部品の概略構成を示した斜視図である（実施例）。
【図３】突き合わせレーザー溶着方法の一例を示した断面図である（実施例）。
【図４】突き合わせレーザー溶着方法の一例を示した平面図である（実施例）。
【図５】突き合わせレーザー溶着方法の他の例を示した断面図である（変形例）。
【図６】突き合わせレーザー溶着方法の他の例を示した平面図である（変形例）。
【図７】樹脂部品の熱かしめ固定方法を示した断面図である（従来の技術）。
【図８】重ね合わせレーザー溶着方法を示した断面図である（従来の技術）。
【符号の説明】
１ 樹脂ケース（外装部品）
２ ベース（内装部品）
１４ 圧入面（突き合わせ部）
２４ 圧入面（突き合わせ部）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a butt laser welding method in which laser light is irradiated and fixed to a butt portion of two parts formed of a resin material.
[0002]
[Prior art]
Conventionally, as a method of fixing resin parts, as shown in FIG. 7, as shown in FIG. 7, an interior part 103 is inserted into a bottomed cylindrical exterior part 102 having an opening 101, and a caulking allowance (fixing cost) ) A heat caulking fixing method is known in which two parts formed of a resin material are fixed by heat caulking 104. Further, as shown in FIG. 8, the interior parts 103 are inserted into the openings 101 of the bottomed cylindrical exterior part 102 and the mating surfaces to be welded and fixed are overlapped in the height direction so that the exterior part 102 and the interior part An overlapping laser welding method is known in which two parts molded from a resin material are welded and fixed by irradiating a laser beam onto the overlapping portion 106 with 103. In this superposition laser welding method, a pressurizing device 105 is required to eliminate the gap between the superposition part 106 between the exterior component 102 and the interior component 103.
[0003]
[Problems to be solved by the invention]
However, in the conventional heat caulking and fixing method for resin parts, the dimension (w) in the width direction of the exterior part 102 does not increase, but the caulking allowance 104 is always applied to the heat caulking part on the opening 101 side of the exterior part 102. There is a problem that the dimension in the height direction is increased by the thickness of the caulking allowance 104 (h <h ′). On the other hand, in the conventional overlapping laser welding method, the exterior component 102 and the interior component 103 are overlapped, and the overlap portion 106 between the exterior component 102 and the interior component 103 is irradiated and fixed by laser light.
[0004]
In this conventional overlay laser welding method, the height direction dimension (h) of the exterior component 102 does not increase, but it is necessary to provide an overlap allowance, and the width direction dimension increases (w <w ′). ) Has arisen. Further, when the exterior component 102 and the interior component 103 are overlapped and then welded and fixed using a laser welding method, when a gap in the height direction of a predetermined value or more occurs on the mating surface of the overlap portion 106, Since the exterior component 102 and the interior component 103 cannot be reliably welded and fixed, it has been necessary to press using the pressurizing dedicated device 105 so that no gap is generated between the mating surfaces. Therefore, the pressurizing apparatus 105 is necessary, and there has been a problem that the assembling cost is increased.
[0005]
OBJECT OF THE INVENTION
The present invention aims to provide a butt laser welding method that can eliminate a caulking allowance or an overlap allowance in order to prevent an increase in size, and can eliminate an apparatus exclusively for pressurization in order to reduce assembly costs. And
[0006]
[Means for Solving the Problems]
According to the first aspect of the present invention, a surface to be welded and fixed between a container-shaped exterior part molded from a resin material and an interior part molded from a resin material (a press-fit surface on the opening side of the exterior part) The press-fitting surface of interior parts) is a press-fitting dimension shape (full press-fitting shape).
First, in the press-fitting and fixing process of two parts, the interior parts molded with a resin material are press-fitted into the openings of the outer parts molded with a resin material, and the surfaces to be welded and fixed between the two parts consisting of the outer parts and the inner parts Match . That is, the press-fit surface of the interior part is abutted against the press-fit surface of the exterior part on the opening side of the exterior part by press-fitting the press-fit surface of the interior part on the press-fit surface on the opening side of the exterior part. At this time, the interior part is temporarily fixed in the exterior part by the elastic deformation force on the opening side of the exterior part with the press-fitting surface of the interior part abutting against the press-fit surface on the opening side of the exterior part.
Next, in the laser welding and fixing step, the laser beam is irradiated toward the two-part butted portion composed of the press-fit surface on the opening side of the exterior component and the press-fit surface of the interior component, so that the press-fit on the opening side of the exterior component is performed. Weld and fix the press-fitting surface of interior parts to the surface . Thereby, the butt laser welding of two parts which consist of exterior components and interior components can be performed .
In addition, the surface to be welded and fixed of the two parts consisting of the exterior part and the interior part (the press-fitting surface on the opening side of the exterior part, the press-fit surface of the interior part) is made into a press-fitting dimension shape (full press-fitting shape) . An apparatus exclusively used for pressurization for eliminating a gap between the joining surfaces of two parts made of a resin material, which was necessary in the superposition laser welding method, can be eliminated.
In the conventional technique was required, caulking margin (fixed fee) or it is not necessary to overlay margin provided, it is possible to prevent upsizing of the height dimension and the width dimension of the part.
[0007]
According to the invention described in claims 2 to 4, when laser light is applied from the interior component side toward the butted portion of the two components, the interior component has a transmittance of a predetermined value or more. The laser light passes through the interior part and reaches the press-fitting surface on the opening side of the exterior part. When the laser light reaches the exterior part, the exterior part has a transmittance equal to or lower than a predetermined value, so that the laser light is absorbed and heat is generated and melted. The exotherm generated in press-fitting surface of the opening side of the outer parts, also transmitted to the press-fitting surface of the interior part is in contact with the exterior part, leach also press-fitting surface of the interior part. When the heat generation has subsided, the melted portion is re-solidified, and the surface to be welded and fixed of the two parts is welded and fixed.
According to the fifth aspect of the present invention, when the press-fitting surface of the lid part of the interior part is press-fitted into the press-fitting surface on the opening side of the exterior part in the press-fitting and fixing process of the two parts, Since it is press-fitted and positioned until the protrusion comes into contact with the bottom wall portion of the bottom cylindrical exterior part, the position in the height direction of the press-fitting surface of the lid part of the interior part is the height direction of the side wall part of the exterior part Is always constant.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
[Configuration of Example]
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on examples with reference to the drawings. Here, FIG. 1 is a diagram showing a main part of a functional component mounted on a vehicle such as an automobile, and FIG. 2 is a diagram showing a schematic configuration of the functional component.
[0009]
The functional component of the present embodiment is a sensor component such as a collision detection sensor that detects that a vehicle such as an automobile has collided with an object, and is a resin case that is a first resin molded product that is integrally formed with a first resin material. 1 and a base 2 which is a second resin molded product integrally formed of a second resin material, and an electrical component or an electronic component (see FIG. 1) housed in an internal space 3 formed between the resin case 1 and the base 2 2 parts of the resin material consisting of the resin case 1 and the base 2 are fixed by laser welding. Laser welding fixing is a welding fixing method in which two parts made of a resin material are welded and fixed using a single wavelength beam focused at a high energy density, such as a semiconductor laser, YAG laser, CO 2 laser, etc. Use laser light (laser beam) from a laser oscillator.
[0010]
The resin case 1 corresponds to the exterior part of the present invention, and is integrally formed into a container shape (bottomed cylindrical shape) by a first resin material such as a thermoplastic polyester resin (PBT) or a thermoplastic polyamide resin (PA). It is the 1st resin component made. The resin case 1 is formed in a bottomed cylindrical shape having a height direction dimension h and a width dimension dimension w, and has a rectangular or rectangular opening 12 on one end side of the rectangular side wall 11. And has a rectangular or rectangular bottom wall portion 13 at the other end of the side wall portion 11. A rectangular tube-shaped press-fitting surface (butting portion) 14 for welding and fixing the base 2 is provided on the inner wall surface of the resin case 1 on the side of the opening 12 of the side wall 11.
[0011]
The base 2 is a second resin component that is integrally formed of a second resin material such as a thermoplastic polyester resin (PBT) or a thermoplastic polyamide resin (PA). The base 2 is a rectangular or rectangular lid body 21 that is press-fitted into the press-fitting surface 14 on the opening 12 side of the resin case 1, and extends downward from the inner side surface of the lid body portion 21 in the figure. 1 has a protrusion 22 that contacts the bottom wall surface of the bottom wall 13. In addition, a rectangular tube-shaped press-fitting surface (butting portion) 24 is provided on the outer peripheral surface of the lid portion 21 of the base 2 so as to be butted against the press-fitting surface 14 of the resin case 1.
[0012]
[Matching Laser Welding Method of Examples]
Next, the butt laser welding method of this embodiment will be briefly described with reference to FIGS. Here, FIG. 3 and FIG. 4 are diagrams showing an example of the butt laser welding method.
[0013]
Here, in this embodiment, the surface to be welded and fixed of the two parts consisting of the resin case 1 and the base 2 ( the press-fitting surface 14 on the opening 12 side of the side wall portion 11 of the resin case 1 and the press-fitting of the lid portion 21 of the base 2) The surface 24) has a press-fitting dimension shape (full-circular press-fitting shape) . For example, when the width direction dimension of one surface of the press-fitting surface 14 of the resin case 1 is l ′ and the width direction dimension of one surface of the press-fitting surface 24 of the base 2 is l, the relationship is l ′ ≦ l. It is provided as follows. Further, since the first resin material of the resin case 1 and the second resin material of the base 2 have different transmittances (laser light transmission degrees), the laser light is used for the second resin material of the base 2. The laser beam passes through the first resin material of the resin case 1 and reaches the first resin material.
[0014]
First, in the two-part press-fitting and fixing step, as shown in FIG. 2, the worker presses the square cylindrical press-fitting surface on the side of the opening 12 of the side wall 11 of the container-shaped (bottom-bottomed cylindrical) resin case 1. 14, the rectangular tube-shaped press-fit surface 24 of the rectangular or rectangular lid body portion 21 of the base 2 made of the second resin material is press-fitted. At this time, the base 2 is temporarily fixed in the resin case 1 with the press-fitting surface 24 of the base 2 abutting against the press-fitting surface 14 of the resin case 1 by the elastic deformation force on one end side of the side wall portion 11 of the resin case 1. . Further, since the base 2 is press-fitted and positioned until the protruding portion 22 comes into contact with the bottom wall surface of the bottom wall portion 13 of the resin case 1, the position of the press-fitting surface 24 of the base 2 in the height direction is the position of the side wall portion 11. Always constant in the height direction.
[0015]
Next, in the laser welding and fixing step, as shown in FIGS. 3 and 4, a laser beam (laser beam) is irradiated obliquely from the lower end of the press-fit surface 14 to the upper end of the press-fit surface 14 (see FIG. 3). This is performed over the entire circumference of the rectangular tube-shaped press-fitting surface 14 of the rectangular tube-shaped side wall 11 of the resin case 1 (the rectangular tube-shaped press-fitting surface 24 of the lid portion 21 of the base 2). Thus, two parts of the resin material made of the resin case 1 and the base 2 are butt-welded and welded. At this time, the resin materials of the resin case 1 and the base 2 have different transmittances. When the laser beam is applied from the outer peripheral side edge of the upper end surface of the lid portion 21 of the base 2, the second resin material constituting the base 2 has a transmittance greater than a predetermined value better than the first resin material. Therefore, the laser light passes through the second resin material of the base 2, and the laser light reaches the first resin material of the press-fit surface 14 on the opening 12 side of the resin case 1.
[0016]
When the laser light reaches the press-fit surface 14 on the opening 12 side of the resin case 1, the first resin material constituting the resin case 1 is given a transmittance that is lower than a predetermined value that is worse than that of the second resin material. Therefore, it absorbs the laser beam and generates heat and melts. The generated heat is also transmitted to the second resin material of the rectangular tube-shaped press-fitting surface 24 of the lid portion 21 of the base 2 that is in contact with the press-fitting surface 14 of the side wall 11 of the resin case 1. 2 The resin material also melts out. When the heat generation is stopped, the melted portion (the portion surrounded by the dashed line in FIG. 1 and FIG. 3) re-solidifies. In this laser welding and fixing step, as shown in FIG. 1, the inner wall surface on the opening 12 side of the side wall portion 11 of the resin case 1 and the outer peripheral surface of the lid portion 21 of the base 2 are fixed by welding.
[0017]
[Effect of Example]
As described above, in the functional part of the present embodiment, welded and fixed side facing the base 2 by Li Cheng 2 components that are integrally formed by integrally molded resin casing 1 and the second resin material by a first resin material (resin The press-fitting surface 14 on the side of the opening 12 of the side wall 11 of the case 1 and the press-fitting surface 24 of the lid part 21 of the base 2 are formed into a full-fitting press-fitting shape, which is necessary in the conventional overlapping laser welding method. Further, it is possible to eliminate the need for a dedicated pressurizing device for eliminating the gap between the mating surfaces of the two parts made of the resin material.
[0018]
Then, the rectangular cylindrical press-fitting surface 24 of the lid portion 21 of the base 2 is press-fitted into the rectangular cylindrical press-fitting surface 14 on the opening 12 side of the side wall 11 of the resin case 1, so that the press-fitting surface of the resin case 1 is pressed. 14, after the press-fit surface 24 of the base 2 is abutted against the laser beam from the outer peripheral side edge of the upper end surface of the lid portion 21 of the base 2 toward the press-fit surface 14 on the opening 12 side of the side wall 11 of the resin case 1. By performing a butt laser welding method that irradiates the laser beam obliquely (laser irradiation), the square cylindrical press-fit surface 14 of the side wall 11 of the resin case 1 and the square cylindrical press-fit surface 24 of the lid 21 of the base 2 are used. Can be welded and fixed. In addition, there is no need to provide caulking allowance (fixing allowance) or overlap allowance , which was necessary in the conventional technology, and the size of the finished functional parts in the width direction (w) and height direction (h) is increased. Can be prevented.
[0019]
[Modification]
In the present embodiment, the first resin material constituting the resin case 1 has a transmittance that is lower than a predetermined value worse than that of the second resin material, and the second resin material of the base 2 is better than the first resin material. As shown in FIGS. 3 and 4, the lid body 21 side of the base 2 faces the press-fit surface 14 on the opening 12 side of the side wall 11 of the resin case 1. Although two parts made of resin material are welded and fixed more obliquely by applying laser light, the first resin material constituting the resin case 1 is transmitted through a predetermined value that is better than the second resin material. As shown in FIG. 5 and FIG. 6, the lid portion 21 of the base 2 is made to have a transmittance and to give the second resin material of the base 2 a transmittance equal to or lower than a predetermined value, which is worse than that of the first resin material. The laser beam is inclined obliquely from the outer wall surface side of the side wall portion 11 of the resin case 1 toward the press-fit surface 24 on the outer periphery of the resin case 1. Against the horizontal direction may be performed welding fixation of 2 parts made of a resin material.
[0020]
In the present embodiment, the two-piece rectangular tube-shaped press-fitting surfaces 14, 24 composed of the resin case 1 and the base 2 are brought into contact with each other, and then laser light is irradiated toward the press-fitting surface 14, so that the lid portion of the base 2 The entire outer periphery of 21 is welded and fixed to the side wall portion 11 of the resin case 1, but only the part to be welded and fixed of two parts made of resin material is partially press-fitted and abutted, and then laser light is irradiated toward the press-fitted surface. Thus, two parts made of a resin material may be partially welded and fixed. In the present embodiment, an example in which a container-shaped or bottomed cylindrical resin case 1 is used as an exterior part has been described. However, a frame-shaped or bottomless cylindrical resin molded article may be used as an exterior part. Furthermore, although the present Example demonstrated the example using the base 2 which has a substantially T-shaped cross section as an interior component, you may use a substantially ring-plate-shaped resin molded product as an interior component.
[0021]
In this embodiment, the opening shape of the resin case (exterior component) 1 is a square shape, and the outer shape of the lid portion 21 (interior component) of the base 2 is also a square shape. As the outer shape, a circular shape, an elliptical shape, a triangular shape, a rectangular shape, a trapezoidal shape, a rhombus shape, a quadrangular shape, or a polygonal shape such as a pentagon or more may be used. Further, any combination of the above shapes may be used for the combination of the opening shape of the exterior component and the outer shape of the interior component. For example, the opening shape of the exterior part may be a square shape or a rectangular shape, and the outer shape of the interior part may be a circular shape, a polygonal shape of pentagon or more, an elliptical shape, or an elliptical shape. Alternatively, the opening shape of the exterior part may be a circular shape, a polygonal shape of pentagon or more, an elliptical shape, or an elliptical shape, and the external shape of the interior part may be a square shape or a rectangular shape. In these cases, only the part to be welded and fixed between the two parts made of the resin material is partially press-fitted and abutted, and then the laser light is irradiated toward the press-fitted surface to partially attach the two parts made of the resin material. It is fixed by welding.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a main part of a functional component (Example).
FIG. 2 is a perspective view showing a schematic configuration of a functional component (Example).
FIG. 3 is a sectional view showing an example of a butt laser welding method (Example).
FIG. 4 is a plan view showing an example of a butt laser welding method (Example).
FIG. 5 is a cross-sectional view showing another example of a butt laser welding method (modified example).
FIG. 6 is a plan view showing another example of a butt laser welding method (modified example).
FIG. 7 is a cross-sectional view showing a heat caulking and fixing method for resin parts (prior art).
FIG. 8 is a cross-sectional view showing a superposition laser welding method (prior art).
[Explanation of symbols]
1 Resin case (exterior part)
2 Base (interior parts)
14 Press-fit surface (butting part)
24 Press-fit surface (butting part)

Claims (5)

樹脂材で成形された容器形状の外装部品および樹脂材で成形された内装部品よりなる２部品の溶着固定したい面を圧入寸法形状とし、
前記外装部品の開口部側の圧入面に、前記内装部品の圧入面を圧入することで、前記外装部品の開口部側の圧入面に前記内装部品の圧入面を突き合わせる２部品の圧入固定工程と、
前記外装部品の開口部側の圧入面および前記内装部品の圧入面よりなる前記２部品の突き合わせ部に向かってレーザー光を照射することで、前記外装部品の開口部側の圧入面に前記内装部品の圧入面を溶着固定するレーザー溶着固定工程と
を備えたことを特徴とする突き合わせレーザー溶着方法。 The welded and fixed side facing the 2 components within consisting instrumentation parts molded in the exterior parts and resin material of the container-shaped molded with resin material and pressed dimensions,
A press-fitting and fixing step of two parts in which the press-fitting surface of the interior part is pressed against the press-fitting surface of the exterior part by press-fitting the press-fitting surface of the interior part into the press-fit surface of the exterior part on the opening side When,
The interior part is applied to the press-fitting surface on the opening side of the exterior part by irradiating a laser beam toward the butted part of the two parts including the press-fit surface on the opening side of the exterior part and the press-fit surface of the interior part. Laser welding and fixing process to fix and fix the press-fitting surface of
Butt laser welding method characterized by comprising a. 請求項１に記載の突き合わせレーザー溶着方法において、
前記外装部品を成形する樹脂材および前記内装部品を成形する樹脂材には、それぞれ異なる透過率を持たせたことを特徴とする突き合わせレーザー溶着方法。In the butt laser welding method according to claim 1,
A butt laser welding method, wherein the resin material for molding the exterior part and the resin material for molding the interior part have different transmittances. 請求項２に記載の突き合わせレーザー溶着方法において、
レーザー光を当てる側の前記内装部品を成形する樹脂材には、前記外装部品を成形する樹脂材よりも大きい所定値以上の透過率を持たせたことを特徴とする突き合わせレーザー溶着方法。In the butt laser welding method according to claim 2,
A butt laser welding method, wherein a resin material for molding the interior part on the side to which laser light is applied has a transmittance greater than a predetermined value greater than that of the resin material for molding the exterior part. 請求項２に記載の突き合わせレーザー溶着方法において、
レーザー光が到達する側の前記外装部品を成形する樹脂材には、前記内装部品を成形する樹脂材よりも小さい所定値以下の透過率を持たせたことを特徴とする突き合わせレーザー溶着方法。In the butt laser welding method according to claim 2,
A butt laser welding method characterized in that a resin material for molding the exterior component on the laser beam arrival side has a transmittance equal to or less than a predetermined value smaller than that of the resin material for molding the interior component. 請求項１ないし請求項４のうちのいずれか１つに記載の突き合わせレーザー溶着方法において、In the butt laser welding method according to any one of claims 1 to 4,
前記外装部品は、有底筒状に一体成形されて、筒状の側壁部の一端側に開口部を有し、且つ前記側壁部の他端側に底壁部を有し、The exterior component is integrally formed in a bottomed cylindrical shape, has an opening on one end side of the cylindrical side wall portion, and has a bottom wall portion on the other end side of the side wall portion,
前記内装部品は、前記外装部品の開口部側の圧入面に圧入される蓋体部、およびこの蓋体部の内側面より延長されて前記底壁部に当接する突起部を有していることを特徴とする突き合わせレーザー溶着方法。The interior part has a lid part that is press-fitted into a press-fit surface on the opening side of the exterior part, and a protrusion that extends from the inner side surface of the lid part and contacts the bottom wall part. Butt laser welding method characterized by.
JP2001207303A 2001-07-09 2001-07-09 Butt laser welding method Expired - Fee Related JP3753024B2 (en)

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