JP2002331588A - Laser welding method - Google Patents

Laser welding method

Info

Publication number
JP2002331588A
JP2002331588A JP2001142236A JP2001142236A JP2002331588A JP 2002331588 A JP2002331588 A JP 2002331588A JP 2001142236 A JP2001142236 A JP 2001142236A JP 2001142236 A JP2001142236 A JP 2001142236A JP 2002331588 A JP2002331588 A JP 2002331588A
Authority
JP
Japan
Prior art keywords
laser
laser beam
resin member
resin
laser light
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.)
Granted
Application number
JP2001142236A
Other languages
Japanese (ja)
Other versions
JP4731040B2 (en
Inventor
Daiki Akisawa
大樹 秋澤
Yoshiaki Nakagawa
義明 中川
Yuichi Uchiyama
裕一 内山
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.)
Honda Motor Co Ltd
Original Assignee
Honda Motor Co 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 Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to JP2001142236A priority Critical patent/JP4731040B2/en
Publication of JP2002331588A publication Critical patent/JP2002331588A/en
Application granted granted Critical
Publication of JP4731040B2 publication Critical patent/JP4731040B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1664—Laser beams characterised by the way of heating the interface making use of several radiators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1664—Laser beams characterised by the way of heating the interface making use of several radiators
    • B29C65/1667—Laser beams characterised by the way of heating the interface making use of several radiators at the same time, i.e. simultaneous laser welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1677—Laser beams making use of an absorber or impact modifier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C66/40—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
    • B29C66/70—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
    • B29C66/80—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
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
    • B29C65/1616—Near infrared radiation [NIR], e.g. by YAG lasers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
    • B29C65/1622—Far infrared radiation [FIR], e.g. by FIR 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
    • 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

Abstract

PROBLEM TO BE SOLVED: To provide a laser welding method by which no inexpediency such as scorch or melt in a resin member, even when a laser beam of a comparatively high output is emitted and weld time can be shortened. SOLUTION: When a laser beam-transmissible resin member 1 and a laser beam-absorptive resin member 2 are lapped on each other and a laser beam 3 is emitted to the joined part through the laser beam-transmissible resin member 1 and both resin members 1 and 2 are mutually welded by melting the joined part, the laser welding is performed in such a way that the laser beam is condensed to the joined part in two directions or not less than two multi-layer directions.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明はレーザ光を利用し
て、透過側の樹脂表面に悪影響を与えることなく、短時
間で樹脂部材同士を接合するレーザ溶着方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser welding method for joining resin members in a short time by using a laser beam without adversely affecting a resin surface on a transmission side.

【０００２】[0002]

【従来の技術】熱可塑性樹脂のレーザ光照射による溶融
を利用して樹脂部材同士の接着を行う方法が、特開昭６
２−６２７３４号公報、特開昭６２−７４６３０号公
報、特開昭６２−７４６３１号公報または特公平５−４
２３３６号公報等に提案されている。2. Description of the Related Art A method of bonding resin members by utilizing the melting of a thermoplastic resin by laser beam irradiation is disclosed in
2-62734, JP-A-62-74630, JP-A-62-74631 or JP-B-5-4.
No. 2336 has been proposed.

【０００３】これらの方法は、レーザ光の透過率が高い
樹脂部材とレーザ光の吸収率が高い樹脂部材とを重ね合
わせ、この重ね合わせ（接合）部分にレーザ光を透過す
る樹脂部材の側から照射し、レーザ光を吸収する樹脂部
材の一部を溶融せしめることで樹脂部材同士を接合する
ものである。また、前記特公平５−４２３３６号公報で
は、樹脂部材を加熱する代わりに樹脂部材間に介在せし
めた接着剤をレーザ光で加熱することで樹脂部材同士を
接合する方法も提案されている。In these methods, a resin member having a high laser beam transmittance and a resin member having a high laser beam absorptivity are overlapped, and the overlapped (joined) portion is formed from the side of the resin member transmitting the laser beam. The resin members are joined by irradiating and melting a part of the resin members that absorb the laser beam. Also, Japanese Patent Publication No. 5-42336 proposes a method of joining resin members by heating an adhesive interposed between the resin members with a laser beam instead of heating the resin members.

【０００４】[0004]

【発明が解決しようとする課題】上記各公報の方法によ
ってレーザ溶着を行う場合、生産効率を上げるためにレ
ーザ出力を高くすると、レーザ光透過性樹脂部材の表面
に焼けや溶融等の不具合が生じて製品の品質低下を招
く。その理由は、レーザ光透過性が高い樹脂であっても
僅かにレーザ光を吸収するため、レーザ密度が高いとエ
ネルギー吸収量が増加するためである。In the case of performing laser welding by the methods disclosed in the above publications, if the laser output is increased to increase the production efficiency, defects such as burning and melting occur on the surface of the laser light transmitting resin member. This leads to lower product quality. The reason is that even if the resin has a high laser beam transmittance, the resin absorbs a small amount of the laser beam, so that when the laser density is high, the energy absorption increases.

【０００５】また、通常のレーザ溶着を行う場合におい
ても、レーザ光は、透過性樹脂部材に入射するまでの空
中通過時の吸収や拡散、透過性樹脂部材表面での反射、
透過性樹脂部材中への吸収や拡散、吸収性樹脂表面での
反射等により減衰されるため、部材が厚い場合等には溶
着に必要なエネルギーが十分に得られない場合がある。
この場合にもレーザ出力を上げざるを得ないため、やは
りレーザ光透過性樹脂部材の表面に焼けや溶融等の不具
合が生じる。[0005] In addition, even when ordinary laser welding is performed, laser light is absorbed or diffused when passing through the air until it is incident on the transparent resin member, and reflected or reflected on the surface of the transparent resin member.
Since it is attenuated by absorption or diffusion into the transparent resin member, reflection on the surface of the absorbent resin, or the like, sufficient energy may not be obtained for welding when the member is thick or the like.
In this case as well, the laser output must be increased, so that the surface of the laser light transmitting resin member also suffers from problems such as burning and melting.

【０００６】[0006]

【課題を解決するための手段】本発明は、比較的高出力
のレーザを照射しても樹脂部材に焼けや溶融等の不具合
が生ずることがなく、溶着時間の短縮も可能なレーザ溶
着方法を提供することを目的とする。According to the present invention, there is provided a laser welding method capable of shortening the welding time without causing a problem such as burning or melting of a resin member even when a relatively high output laser is irradiated. The purpose is to provide.

【０００７】上記課題を解決するため、本発明レーザ溶
着方法は、レーザ光透過性樹脂部材と、レーザ光吸収性
樹脂部材とを重ね合わせ、レーザ光透過性樹脂部材を通
して接合部にレーザ光を照射し、該接合部を溶融せしめ
て両樹脂部材を相互に溶着する方法であって、前記レー
ザ光を、２方向またはそれ以上の多方向から該接合部に
集光されるように照射する。前記２方向またはそれ以上
の多方向から照射されるレーザ光は、レーザ光同士が相
互に重ならない状態でレーザ光透過性樹脂部材へ入射さ
れることが好ましい。In order to solve the above problems, a laser welding method according to the present invention comprises superposing a laser light transmitting resin member and a laser light absorbing resin member, and irradiating a laser beam to a joint portion through the laser light transmitting resin member. Then, the joining portion is melted and the two resin members are welded to each other, and the laser beam is irradiated so as to be focused on the joining portion from two or more directions. It is preferable that the laser light irradiated from two or more directions is incident on the laser light transmitting resin member in a state where the laser lights do not overlap each other.

【０００８】[0008]

【発明の実施の形態】以下に本発明の実施の形態を添付
図面に基づいて説明する。図１は本発明のレーザ溶着方
法の一例を示す斜視図、図２は断面図である。図に示す
ように、レーザ光透過性樹脂部材１とレーザ光吸収性樹
脂部材２とが重ね合わされ、２方向からのレーザ光３ａ
および３ｂが互いに重ならない状態で、レーザ光透過性
樹脂部材１の表面に入射されている。なおレーザ光３ａ
および３ｂは、図示されない凸レンズでそれぞれ接合面
４に集光するようにコントロールされている。Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view showing an example of the laser welding method of the present invention, and FIG. 2 is a sectional view. As shown in the figure, a laser beam transmitting resin member 1 and a laser beam absorbing resin member 2 are overlapped, and a laser beam 3a from two directions is formed.
And 3b are incident on the surface of the laser light transmitting resin member 1 without overlapping each other. The laser beam 3a
And 3b are controlled by a convex lens (not shown) so as to converge on the joint surface 4, respectively.

【０００９】本発明方法によれば、レーザ光透過性樹脂
部材１へのレーザの入射エネルギー密度は、従来の１箇
所からの入射エネルギー（Ｗ）の密度の半分で済む。つ
まりレーザ光３ａおよび３ｂの入射エネルギーをそれぞ
れＷ/２に減らしても、接合面４に集光されたときのエ
ネルギー量は、従来の１箇所からの入射の場合と変わら
ないため良好な溶着を行うことができる。According to the method of the present invention, the incident energy density of the laser beam on the laser beam transmitting resin member 1 is half that of the conventional incident energy (W) from one point. In other words, even if the incident energy of the laser beams 3a and 3b is reduced to W / 2, respectively, the amount of energy condensed on the bonding surface 4 is the same as that of the conventional case where light is incident from one point, so that good welding can be achieved. It can be carried out.

【００１０】また観点を変えて、従来の１箇所からの入
射と同じ量のレーザ光を２箇所から入射すれば２Ｗのエ
ネルギー量を接合面４に供給することができるため、短
時間で溶着を終了することができる。From a different point of view, if the same amount of laser light is incident from two places as in the conventional case from one place, an energy amount of 2 W can be supplied to the bonding surface 4, so that welding can be performed in a short time. Can be terminated.

【００１１】レーザ光３ａ、３ｂの光源としての限定は
特にないが、半導体レーザ、ＹＡＧレーザを光源とした
遠近赤外領域、可視光領域等各種波長のものを使用する
ことができる。またレーザ光は複数の光源を使用する
か、または単一光源のレーザ光を光ファイバで複数に分
岐して使用することができる。Although there is no particular limitation on the light source of the laser beams 3a and 3b, those having various wavelengths such as a far-near infrared region and a visible light region using a semiconductor laser or a YAG laser as a light source can be used. In addition, a plurality of light sources can be used as the laser light, or a single light source can be used by splitting the laser light into a plurality of light beams using an optical fiber.

【００１２】レーザ光透過性樹脂部材１を構成する樹脂
としては、使用するレーザ光３ａ、３ｂの波長領域にお
けるレーザ光吸収率が低いものほど好ましく、ポリエチ
レンテレフタレート（ＰＥＴ）、ポリブチレンテレフタ
レート等のポリエステル樹脂、ポリエチレン、ポリプロ
ピレン等のポリオレフィン樹脂、ポリアミド樹脂、塩化
ビニル樹脂、フッ素樹脂等から適宜選択することができ
る。また、上記各種樹脂中に、レーザ光を吸収しない
か、または吸収しにくい、例えばガラス繊維、ナイロン
繊維等の強化材を添加した繊維強化樹脂も好ましく使用
することができる。As the resin constituting the laser beam transmitting resin member 1, the resin having a lower laser beam absorptivity in the wavelength region of the laser beams 3a and 3b to be used is preferable. Resins, polyolefin resins such as polyethylene and polypropylene, polyamide resins, vinyl chloride resins, fluororesins and the like can be appropriately selected. In addition, a fiber-reinforced resin in which a reinforcing material such as a glass fiber or a nylon fiber, which does not or hardly absorb laser light, is added to the above various resins can be preferably used.

【００１３】一方、レーザ光吸収性樹脂部材２として
は、使用するレーザ光３ａ、３ｂの波長領域におけるレ
ーザ光吸収率が高い官能基を有する樹脂を使用すること
もできるが、溶着時におけるレーザ光透過性樹脂部材１
との接着性を考慮すると、できるだけ使用するレーザ光
透過性樹脂部材１と同じ組成の樹脂あるいは組成が異な
っていても相溶性の高い樹脂を採用することが好まし
い。したがって、レーザ光吸収性樹脂部材２としては、
上述の各樹脂に、レーザ光３ａ、３ｂの波長領域におけ
るレーザ光吸収率が高い添加物、たとえばカーボンブラ
ック他の各種着色顔料を配合したものを使用することが
好ましい。On the other hand, as the laser light absorbing resin member 2, a resin having a functional group having a high laser light absorption rate in the wavelength region of the laser light 3a, 3b to be used can be used. Transparent resin member 1
In consideration of the adhesiveness with the resin, it is preferable to use a resin having the same composition as the laser light transmitting resin member 1 used as much as possible or a resin having high compatibility even if the composition is different. Therefore, as the laser light absorbing resin member 2,
It is preferable to use additives obtained by blending the above-mentioned resins with additives having a high laser beam absorptivity in the wavelength region of the laser beams 3a and 3b, for example, various color pigments such as carbon black.

【００１４】レーザ光透過性樹脂部材１とレーザ光吸収
性樹脂部材２とは十分に位置合わせを行った後になるべ
く隙間がないように加圧・密着させて固定する。両部材
の固定方法としては、ガラス板等のレーザ光透過性材料
で両部材を挟む方法、レーザ光透過性の袋状樹脂シート
に両部材を入れ、袋内を抜気して固定する方法等があ
る。After the laser light transmitting resin member 1 and the laser light absorbing resin member 2 are sufficiently aligned, they are pressed and adhered so that there is as little gap as possible. As a method of fixing both members, a method of sandwiching both members with a laser light transmitting material such as a glass plate, a method of putting both members in a laser light transmitting bag-like resin sheet, and removing and fixing the inside of the bag, etc. There is.

【００１５】レーザ光３ａ、３ｂのレーザ光照射設備と
しては、例えばレーザヘッド（図示せず）を配置し、Ｎ
Ｃ制御により３次元空間で自由に移動させることができ
ることが好ましい。レーザ光３ａ、３ｂは、レーザヘッ
ドの移動により、図の手前側から奥行き方向（紙面垂直
方法）に向かって順次レーザ光吸収性樹脂部材２の接合
部４を溶融してゆく。As equipment for irradiating the laser beams 3a and 3b, for example, a laser head (not shown) is provided and N
It is preferable to be able to move freely in a three-dimensional space by C control. The laser beams 3a and 3b melt the joints 4 of the laser light-absorbing resin member 2 sequentially from the near side in the figure toward the depth direction (vertical direction on the paper) by the movement of the laser head.

【００１６】[0016]

【発明の効果】以上に説明したように本発明によれば、
レーザ光を２方向またはそれ以上の多方向から該接合部
に集光されるように照射するため、接合部に集光された
際には比較的高出力となるレーザ光を照射しても、それ
ぞれのレーザ光の出力が低いため樹脂部材に焼けや溶融
等の不具合が生ずることがない。また、このような不具
合が生ずることがないため、接合部には従来よりも強い
レーザ光を集光させることができ、その結果、溶着時間
を短縮することもできる。According to the present invention as described above,
In order to irradiate the laser beam so as to be condensed on the joint from two or more directions, even when irradiating a laser beam having a relatively high output when condensed on the joint, Since the output of each laser beam is low, problems such as burning and melting do not occur in the resin member. In addition, since such a problem does not occur, a laser beam that is stronger than before can be focused on the bonding portion, and as a result, the welding time can be shortened.

【００１７】また、本発明方法によれば、樹脂部材同士
をレーザ光で迅速に溶着させることができ、樹脂の損傷
もないため、例えばインストルメントパネル等の自動車
部品、電池ケース等の電気・電子部品を好適に製造でき
る。Further, according to the method of the present invention, since the resin members can be quickly welded to each other by the laser beam and the resin is not damaged, for example, automobile parts such as instrument panels, electric / electronic devices such as battery cases, etc. Parts can be suitably manufactured.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明のレーザ溶着方法の一例を示す斜視図FIG. 1 is a perspective view showing an example of a laser welding method according to the present invention.

【図２】本発明のレーザ溶着方法の一例を示す断面図FIG. 2 is a sectional view showing an example of the laser welding method of the present invention.

【符号の説明】[Explanation of symbols]

１…レーザ光透過性樹脂部材、２…レーザ光吸収性樹脂
部材、３ａ、３ｂ…レーザ光、４…接合面。DESCRIPTION OF SYMBOLS 1 ... Laser light transmissive resin member, 2 ... Laser light absorbing resin member, 3a, 3b ... Laser light, 4 ... Junction surface.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 内山 裕一 埼玉県狭山市新狭山１丁目10番地１ ホン ダエンジニアリング株式会社内 Ｆターム(参考） 4E068 BF00 CD02 DB10 4F211 AA04 AA11 AA15 AA17 AA24 AA29 AD05 AD19 AD32 AH25 TA01 TC09 TD11 TH01 TH02 TH06 TN27  ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuichi Uchiyama 1-10-1 Shinsayama, Sayama-shi, Saitama F-term in Honda Engineering Co., Ltd. (Reference) 4E068 BF00 CD02 DB10 4F211 AA04 AA11 AA15 AA17 AA24 AA29 AD05 AD19 AD32 AH25 TA01 TC09 TD11 TH01 TH02 TH06 TN27

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 レーザ光透過性樹脂部材と、レーザ光吸
収性樹脂部材とを重ね合わせ、レーザ光透過性樹脂部材
を通して接合部にレーザ光を照射し、該接合部を溶融せ
しめて両樹脂部材を相互に溶着する方法であって、前記
レーザ光を、２方向またはそれ以上の多方向から該接合
部に集光されるように照射することを特徴とするレーザ
溶着方法。1. A laser beam transmitting resin member and a laser beam absorbing resin member are superimposed on each other, and a laser beam is irradiated to a joint through the laser beam transmitting resin member. And irradiating the laser beam so that the laser beam is focused on the joint from two or more directions. 【請求項２】 請求項１に記載のレーザ溶着方法におい
て、前記２方向またはそれ以上の多方向から照射される
レーザ光は、レーザ光同士が相互に重ならない状態でレ
ーザ光透過性樹脂部材へ入射されることを特徴とするレ
ーザ溶着方法。2. The laser welding method according to claim 1, wherein the laser light emitted from the two or more directions is applied to the laser light transmitting resin member in a state where the laser lights do not overlap each other. A laser welding method characterized by being incident.
JP2001142236A 2001-05-11 2001-05-11 Laser welding method Expired - Fee Related JP4731040B2 (en)

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US7172174B2 (en) 2003-11-20 2007-02-06 Denso Corporation Laser welding method, laser welding structure, and throttle valve device
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JP2016021383A (en) * 2014-05-30 2016-02-04 オートモーティブ・ライティング・イタリア エス．ピー．エー．・エー・ソシオ・ウニコ Method of laser welding of automotive light and relative automotive light
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