JP2006346935A - Laser joining method - Google Patents

Laser joining method Download PDF

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Publication number
JP2006346935A
JP2006346935A JP2005173837A JP2005173837A JP2006346935A JP 2006346935 A JP2006346935 A JP 2006346935A JP 2005173837 A JP2005173837 A JP 2005173837A JP 2005173837 A JP2005173837 A JP 2005173837A JP 2006346935 A JP2006346935 A JP 2006346935A
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Prior art keywords
laser beam
laser
bonded
lens system
joining
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Inventor
Takeshi Hayakawa
毅 早河
Yasunori Kawamoto
保典 河本
Fumio Kasai
文男 河西
Yozo Iwai
洋三 祝
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Denso Corp
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Denso Corp
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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
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1677—Laser beams making use of an absorber or impact modifier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1687—Laser beams making use of light guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—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
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81266—Optical properties, e.g. transparency, reflectivity
    • B29C66/81267—Transparent to electromagnetic radiation, e.g. to visible light
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/863—Robotised, e.g. mounted on a robot arm
    • 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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for performing the irradiation with a laser beam simply and accurately using a method for performing the irradiation with the laser beam through a generally used lens system scanned in a two-dimensional direction without especially using a laser beam of a long focus structure or expensive equipment such as an articulated robot or the like in a case that the irradiation target of the laser beam has a complicated constitution to interfere with the laser beam. <P>SOLUTION: In this laser joining method for joining both of a first joining target permitting the laser beam to transmit and a second joining target absorbing the laser beam to be heated by irradiating the superposed surface of the first and second joining targets with the laser beam from the side of the first joining target, the irradiation position of the laser beam is adjusted by arranging a laser beam deflecting member between the first joining target and the lens system of a laser beam irradiation device. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、樹脂材料或いは金属材料などの被接合体の接合部にレーザー光を照射することにより、それぞれの材料の被接合体の接合部を加熱溶融させて接合するレーザー接合方法に関する。   The present invention relates to a laser bonding method in which a bonded portion of a material to be bonded, such as a resin material or a metal material, is irradiated with a laser beam to heat and melt the bonded portion of the bonded material of each material.

従来から、樹脂材料或いは金属材料などの被接合体の接合部にレーザー光を照射することにより、それぞれの材料の被接合体の接合部を加熱溶融させて接合するレーザー接合方法は、製品の小型化、コストダウン更には接合強度の高信頼性などのメリットにより種々の分野で利用されてきた。   Conventionally, a laser joining method in which a joining portion of a material to be joined such as a resin material or a metal material is irradiated with a laser beam to heat and melt the joining portion of the material to be joined is a compact product. It has been used in various fields due to advantages such as reduction in cost, cost reduction, and high reliability of bonding strength.

例えば、樹脂材料の接合に関しては、従来技術として、特許文献１及び特許文献２があり、図１（a）に見られるように、レーザー光に対して透過性のある樹脂材料からなる被接合体１と、カーボンなどを含むことによりレーザー光を吸収して加熱される樹脂材料からなる被接合体２とを重ね合わせて、透過性のある被接合体１側からレーザー光３を照射して、被接合体１を透過したレーザー光３が吸収性のある被接合体２を過熱し、その結果、両被接合体１，２の接合面を溶融して接合するものが開示されている。
なお、５は両被接合体１，２の接合部を加圧する透明材料から作られた加圧部材である。 For example, with respect to the bonding of resin materials, there are Patent Documents 1 and 2 as conventional techniques, and as shown in FIG. 1 (a), an object to be bonded made of a resin material that is transparent to laser light. 1 and the object to be bonded 2 made of a resin material that absorbs and heats the laser light by containing carbon or the like, and irradiates the laser light 3 from the transparent object to be bonded 1 side. A laser beam 3 that has passed through the object 1 to be bonded superheats the absorbent object 2 to be bonded, and as a result, the bonding surfaces of both objects 1 and 2 are melted and bonded.
Reference numeral 5 denotes a pressurizing member made of a transparent material that pressurizes the joints of the bodies 1 and 2 to be joined.

しかし、二次元方向に走査されるレンズ系を通してレーザー光３を照射する方法において、図１（a）にあるように、透過性のある被接合体１と一体の製品本体部分１’がレーザー光を干渉するような構造になっている場合には、レーザー光の焦点を特別に長焦点構造にして対応する方法が採られていた。この方法では、レーザー光が長焦点構造であるため、図１（ｂ）のように、溶着部即ち両被接合体１,２の接合面に投入されるエネルギーとほぼ同等のエネルギーがその直前の被接合体１の表面に与えられることにより被接合体１が発火してしまうという問題があった。この問題を避けるために、図２のように、多関節ロボットにより照射する方式も提案されているが、この方法では複雑な形状への対応が困難であると共に溶着部に対して十分なエネルギーが加わらず一部が未溶着になるなどの欠点が生じてしまう可能性があった。また、当然のことながら、この方式は大幅なコストアップになるという問題もある。   However, in the method of irradiating the laser beam 3 through a lens system that is scanned in a two-dimensional direction, as shown in FIG. In the case of a structure that interferes with the laser beam, a method has been adopted in which the focal point of the laser beam is made a particularly long focal structure. In this method, since the laser beam has a long focal structure, as shown in FIG. 1 (b), energy almost equal to the energy input to the welded portion, that is, the joining surface of both the joined bodies 1 and 2, is just before that. There was a problem that the bonded body 1 would ignite when applied to the surface of the bonded body 1. In order to avoid this problem, a method of irradiating with an articulated robot as shown in FIG. 2 has also been proposed. However, it is difficult to cope with a complicated shape by this method and sufficient energy is applied to the welded portion. In addition, there is a possibility that a defect such as a partial unwelding may occur. As a matter of course, this method also has a problem that the cost is significantly increased.

一方、金属材料の接合に関しては、図４のように、接合される二つの金属材料からなる被接合体７,８を重ねた後に、一方の被接合体７側からレーザー光３を照射して加熱し、その熱を被接合体７から被接合体８に熱伝導により伝達して両被接合体７，８を溶融して接合する方法、或いは、図５のように、接合される両被接合体７，８の接合面を突き合わせてその突合せ部分をレーザー光により加熱溶融して接合する所謂突合せ溶接が行われている。   On the other hand, as shown in FIG. 4, after joining the joined bodies 7 and 8 made of two metallic materials to be joined, the laser beam 3 is irradiated from one joined body 7 side. A method of heating and transferring the heat from the object to be bonded 7 to the object to be bonded 8 by heat conduction to melt and bond both the objects to be bonded 7 or 8, or both objects to be bonded as shown in FIG. So-called butt welding is performed in which the joining surfaces of the joined bodies 7 and 8 are butted and the butted portions are heated and melted by laser light to join.

これらの場合も、二次元方向に走査されるレンズ系を通してレーザー光を照射する方法が一般であり、樹脂材料の場合と同様に、図１（a）にあるように、接合される部分と一体の製品本体部分１’がレーザー光を干渉するような構造になっている場合には、レーザー光の焦点を特別に長焦点構造にして対応するか、図２のように、多関節ロボットにより照射する方式が提案されている。特に、後者の方法では複雑な形状への対応が困難であると共に溶着部に対して十分なエネルギーが加わらず一部が未溶着になるなどの欠点が生じてしまう可能性があった。また、当然のことながら、この方式は大幅なコストアップになるという問題もある。   In these cases as well, a method of irradiating a laser beam through a lens system scanned in a two-dimensional direction is generally used. As in the case of a resin material, as shown in FIG. If the product main body part 1 'is structured to interfere with the laser beam, the laser beam is focused with a specially long focal point structure or irradiated by an articulated robot as shown in FIG. A method to do this has been proposed. In particular, in the latter method, it is difficult to cope with a complicated shape, and there is a possibility that defects such as a part not being welded due to a sufficient energy not being applied to the welded portion may occur. As a matter of course, this method also has a problem that the cost is significantly increased.

特開昭６０−２１４９３１号公報JP-A-60-214931 特開２００１−７１３８４号公報JP 2001-71384 A

本発明は、上記の従来技術が有する問題点を解決しようとするものであり、レーザー光の照射対象物が複雑な構成であってレーザー光を干渉してしまうような場合に、特に長焦点構造のレーザー光や多関節ロボットなどの高価な設備を使用することなく、通常使用されている二次元方向に走査されるレンズ系を通してレーザー光を照射する方法を用いて、簡単且つ確実なレーザー光の照射を行う方法を提供することにある。   The present invention is intended to solve the above-described problems of the prior art, and particularly when the object to be irradiated with the laser light has a complicated configuration and interferes with the laser light, the long-focus structure is provided. Without using expensive equipment such as laser light and articulated robots, simple and reliable laser light can be emitted by using a method that irradiates laser light through a lens system that is normally scanned in a two-dimensional direction. It is to provide a method of performing irradiation.

請求項１のレーザー接合方法は、レーザー光を透過する第一の被接合体とレーザー光を吸収して加熱される第二の被接合体とを重ね合わせた後、前記第一の被接合体側から前期重ね合わせた面に対してレーザー光を照射して両被接合体を接合するレーザー接合方法において、前記第一の被接合体とレーザー光照射装置のレンズ系との間にレーザー光偏向部材を配設することによりレーザー光の照射位置を調整することを特徴とするものである。   The laser bonding method according to claim 1, wherein the first bonded object that transmits laser light and the second bonded object that is heated by absorbing laser light are superposed, and then the first bonded object side. A laser beam deflecting member between the first object to be bonded and the lens system of the laser beam irradiation apparatus in the laser bonding method of irradiating a laser beam onto the superposed surface from the first stage and bonding both objects to be bonded The irradiation position of the laser beam is adjusted by disposing.

本発明は、このように構成されているので、レーザー光の照射対象物が複雑な構成であってレーザー光を干渉してしまうような場合に、特に長焦点構造のレーザー光や多関節ロボットなどの高価な設備を使用することなく、レーザー光の屈折効果を利用したレーザー光偏向部材を第一の被接合体とレーザー光照射装置のレンズ系との間に配列するのみで、樹脂等の接合において簡単且つ確実なレーザー接合を行うことができるという効果を奏するものである。   Since the present invention is configured in this way, the laser beam irradiation target has a complicated configuration and interferes with the laser beam. Without using expensive equipment, it is only necessary to arrange a laser beam deflecting member using the refraction effect of the laser beam between the first object to be joined and the lens system of the laser beam irradiation device, and to join resin etc. Thus, it is possible to perform simple and reliable laser bonding.

請求項２の発明のように、好ましくは、前記レンズ系は、二次元方向に走査されるレンズ系であることを特徴とする。   Preferably, the lens system is a lens system scanned in a two-dimensional direction.

このように構成することにより、通常使用されている二次元方向に走査されるレンズ系を使用する方法を用いて、レーザー光の屈折効果を利用したレーザー光偏向部材を第一の被接合体とレーザー光照射装置のレンズ系との間に配列するのみで、簡単且つ確実なレーザー接合を行うことができるという効果を奏するものである。   By configuring in this way, the laser beam deflecting member using the refraction effect of the laser beam is used as the first object to be bonded by using a method that uses a lens system that is normally scanned in a two-dimensional direction. The effect is that simple and reliable laser bonding can be performed only by arranging between the lens system of the laser beam irradiation apparatus.

請求項３の発明のように、好ましくは、前記レーザー光偏向部材は、前記第一の被接合体を押圧する機能を備えるように構成されていることを特徴とする。   According to a third aspect of the present invention, preferably, the laser beam deflecting member is configured to have a function of pressing the first object to be joined.

このように構成されているので、レーザー光偏向部材を配設することにより部品点数が増加しても、被接合体間の接合部を加圧する加圧部材を兼用することで実質的な部品点数の増加を防ぐことができ、コストメリットが大きい。   Since it is configured in this way, even if the number of parts is increased by arranging the laser beam deflecting member, the number of parts can be substantially increased by using the pressure member that pressurizes the joint between the joined bodies. Can be prevented, and the cost merit is great.

請求項４のレーザー接合方法は、レーザー光を吸収して加熱される第一の被接合体と前記第一の被接合体からの熱伝導により加熱される第二の被接合体とを重ね合わせた後、前記第一の被接合体側から前記第一の被接合体に対してレーザー光を照射して両被接合体を接合するレーザー接合方法において、前記第一の被接合体とレーザー光照射装置のレンズ系との間にレーザー光偏向部材を配設することによりレーザー光の照射位置を調整することを特徴とするものである。   The laser bonding method according to claim 4, wherein a first bonded object that is heated by absorbing laser light and a second bonded object that is heated by heat conduction from the first bonded object are overlapped. Then, in the laser bonding method of irradiating the first bonded body from the first bonded body side with the laser beam to bond both bonded bodies, the first bonded body and the laser beam irradiation. A laser beam deflecting member is provided between the lens system of the apparatus and the irradiation position of the laser beam is adjusted.

このように構成されているので、レーザー光の照射対象物が複雑な構成であってレーザー光を干渉してしまうような場合に、特に長焦点構造のレーザー光や多関節ロボットなどの高価な設備を使用することなく、レーザー光の屈折効果を利用したレーザー光偏向部材を第一の被接合体とレーザー光照射装置のレンズ系との間に配列するのみで、金属等の重ね合せ接合において簡単且つ確実なレーザー接合を行うことができるという効果を奏するものである。   Because it is configured in this way, when the object to be irradiated with the laser beam has a complicated configuration and interferes with the laser beam, it is particularly expensive equipment such as a laser beam with a long focal structure or an articulated robot. Without using a laser, simply aligning the laser beam deflecting member using the refraction effect of the laser beam between the first object to be bonded and the lens system of the laser beam irradiation device, it is easy to superimpose metals. In addition, there is an effect that reliable laser bonding can be performed.

請求項５のレーザー接合方法は、レーザー光を吸収して加熱される二つの被接合体のそれぞれの端部を突合わせた後、前記突合せ部にレーザー光を照射して両被接合体を接合するレーザー接合方法において、前記両被接合体の前記突合せ部とレーザー光照射装置のレンズ系との間にレーザー光偏向部材を配設することによりレーザー光の照射位置を調整することを特徴とするものである。   In the laser bonding method according to claim 5, after joining the respective end portions of the two objects to be heated which absorb and heat the laser light, the laser light is irradiated to the butted parts to join both the objects to be bonded. In the laser joining method, the laser light irradiation position is adjusted by disposing a laser light deflecting member between the abutting portion of the both objects to be joined and the lens system of the laser light irradiation apparatus. Is.

このように構成されているので、レーザー光の照射対象物が複雑な構成であってレーザー光を干渉してしまうような場合に、特に長焦点構造のレーザー光や多関節ロボットなどの高価な設備を使用することなく、レーザー光の屈折効果を利用したレーザー光偏向部材を第一の被接合体とレーザー光照射装置のレンズ系との間に配列するのみで、金属等の突合せ接合において簡単且つ確実なレーザー接合を行うことができるという効果を奏するものである。   Because it is configured in this way, when the object to be irradiated with the laser beam has a complicated configuration and interferes with the laser beam, it is particularly expensive equipment such as a laser beam with a long focal structure or an articulated robot. Without using a laser, a laser beam deflecting member utilizing the refraction effect of laser beam is simply arranged between the first object to be bonded and the lens system of the laser beam irradiation device, and can be easily and butt-joined in metal and the like. There is an effect that reliable laser bonding can be performed.

請求項６の発明のように、好ましくは、請求項４及び５の発明における前記レンズ系は、二次元方向に走査されるレンズ系であることを特徴とする。   As in the invention of claim 6, preferably, the lens system in the inventions of claims 4 and 5 is a lens system scanned in a two-dimensional direction.

このように構成することにより、通常使用されている二次元方向に走査されるレンズ系を使用する方法を用いて、レーザー光の屈折効果を利用したレーザー光偏向部材を第一の被接合体とレーザー光照射装置のレンズ系との間に配列するのみで、簡単且つ確実なレーザー接合を行うことができるという効果を奏するものである。   By configuring in this way, the laser beam deflecting member using the refraction effect of the laser beam is used as the first object to be bonded by using a method that uses a lens system that is normally scanned in a two-dimensional direction. The effect is that simple and reliable laser bonding can be performed only by arranging between the lens system of the laser beam irradiation apparatus.

以下、図３〜５に基づいて本発明の実施形態について説明する。各図共、１はレーザー光を透過する樹脂材料からなる被接合体、１’は被接合体１と一体の製品本体部分、２はレーザー光を吸収する樹脂材料からなる被接合体、３はレーザー光、３’はレーザー光照射装置（レンズ系を含む）、４は実施形態１における接合部、５は透明版よりなるレーザー光偏向部材、５aはレーザー光偏向部材の偏向部、５ｂはレーザー光偏向部材の基部、７，８は第二、三実施形態における金属材料からなる被接合体、９は第二、三実施形態における接合部である。
なお、図１及び図２は従来例についての説明図であり、各参照番号は図３〜５と共通であり、６は多関節ロボットである。なお、従来技術については、〔背景技術〕の項で詳述したので、ここでは繰り返した説明は行わない。 Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In each of the drawings, 1 is a joined body made of a resin material that transmits laser light, 1 ′ is a product main body part that is integral with the joined body 1, 2 is a joined body made of a resin material that absorbs laser light, and 3 is Laser light, 3 'is a laser light irradiation device (including a lens system), 4 is a joint portion in the first embodiment, 5 is a laser light deflection member made of a transparent plate, 5a is a deflection portion of the laser light deflection member, and 5b is a laser. The base part of the light deflection member, 7 and 8 are joined bodies made of metal materials in the second and third embodiments, and 9 is a joint part in the second and third embodiments.
1 and 2 are explanatory diagrams of the conventional example. Each reference number is the same as that in FIGS. 3 to 5, and 6 is an articulated robot. Since the prior art has been described in detail in the section “Background Art”, a repeated description will not be given here.

図３に基づいて本発明の第一の実施形態ついて説明する。本実施形態は、特に、樹脂材料相互をレーザー光により接合する技術に関するものである。レーザー光を透過する樹脂材料からなる第一の被接合体１とレーザー光を吸収して加熱される、例えば、カーボンを含有する樹脂材料からなる第二の被接合体２とが重ね合わせられている。次に、二次元方向に走査されるレンズ系を備えたレーザー光照射装置３’により第一の被接合体１側から前期重ね合わせた面に対してレーザー光３を照射することとなるが、この場合、従来からのレンズ系を通して真直ぐにレーザー光３を照射する方式では、第一の被接合体１と一体に形成されている製品本体部分１’がレーザー光３を干渉してしまうので、レーザー光偏向部材５を前記第一の被接合体１とレーザー光照射装置３’のレンズ系との間に配設する。このように構成することにより、レーザー光が干渉されない位置で走査されるレーザー光照射装置３’からのレーザー光をレーザー光偏向部材５により屈折させてその照射位置を調整することにより第一、第二の両被接合体１の接合部４へのレーザー光の照射を簡単且つ確実に行うことができる。   A first embodiment of the present invention will be described based on FIG. In particular, the present embodiment relates to a technique for joining resin materials together with laser light. A first bonded body 1 made of a resin material that transmits laser light and a second bonded body 2 made of a resin material containing carbon, for example, that are heated by absorbing the laser light are superimposed. Yes. Next, the laser beam 3 is irradiated to the surface superposed from the first bonded body 1 side by the laser beam irradiation device 3 ′ having a lens system scanned in a two-dimensional direction. In this case, in the method of irradiating the laser beam 3 straight through the conventional lens system, the product main body portion 1 ′ formed integrally with the first bonded body 1 interferes with the laser beam 3. The laser beam deflecting member 5 is disposed between the first bonded body 1 and the lens system of the laser beam irradiation device 3 ′. With this configuration, the laser beam from the laser beam irradiation device 3 ′ scanned at a position where the laser beam is not interfered is refracted by the laser beam deflecting member 5, and the irradiation position is adjusted to adjust the irradiation position. The laser beam can be easily and reliably irradiated to the joint portions 4 of the two objects to be joined 1.

レーザー光偏向部材５は、それぞれ透明版からなる、レーザー光偏向部材の偏向部５aと、レーザー光偏向部材の基部５ｂとから構成されている。レーザー光偏向部材の基部５ｂは、第一の被接合体１と一体に形成されている製品本体部分１’の上に公知の適宜手段によって安定的に載置されており、レーザー光偏向部材の偏向部５aを含むレーザー光偏向部材５全体の荷重で第一、第二の両被接合体１の接合部４を加圧する加圧部材の機能を併せて備えている。レーザー光偏向部材の偏向部５aは、レーザー光偏向部材の基部５ｂに対して必要角度だけ傾斜して取り付けられている。この角度は、レーザー光が干渉されないで走査されることが可能なレーザー光照射装置３’の最適な位置、その場合の接合部４の位置などを考慮して最適な状況に設計される。また、レーザー光偏向部材の偏向部５aとレーザー光偏向部材の基部５ｂとは、予め一体成形により作成しても、それぞれ別個に作成した後に両者を固定することにより作成してもかまわない。なお、レーザー光偏向部材５は両被接合部材１，２から一定距離離れて配置されているため、当然のことながら、レーザー光による溶着時（接合時）の熱の影響を受けることはない。このため、第一の被接合体１の表面が仮に発火したとしてもその損傷が軽減できるのでレーザー光偏向部材５の交換等の必要が少なくコストダウンに貢献できる。   The laser beam deflecting member 5 is composed of a deflecting portion 5a of the laser beam deflecting member and a base portion 5b of the laser beam deflecting member, each made of a transparent plate. The base 5b of the laser beam deflecting member is stably placed by a known appropriate means on the product main body portion 1 ′ formed integrally with the first object 1 to be joined. A function of a pressurizing member that pressurizes the joint portion 4 of both the first and second members to be joined 1 with the load of the entire laser beam deflecting member 5 including the deflecting portion 5a is provided. The deflecting portion 5a of the laser beam deflecting member is attached so as to be inclined by a necessary angle with respect to the base portion 5b of the laser beam deflecting member. This angle is designed in an optimum state in consideration of the optimum position of the laser beam irradiation apparatus 3 ′ that can be scanned without being interfered with the laser beam, the position of the joint 4 in that case, and the like. The deflecting portion 5a of the laser beam deflecting member and the base portion 5b of the laser beam deflecting member may be created in advance by integral molding, or may be created by fixing them separately and then fixing them together. Since the laser beam deflecting member 5 is disposed at a certain distance from both the members to be bonded 1 and 2, the laser beam deflecting member 5 is naturally not affected by heat during welding (bonding) by the laser beam. For this reason, even if the surface of the first bonded body 1 is ignited, the damage can be reduced, so that it is not necessary to replace the laser beam deflecting member 5, and it is possible to contribute to cost reduction.

次に、図4に基づいて、本発明の第二の実施形態について説明する。第二の実施形態は、特に、金属材料相互をレーザー光により接合する技術に関するものである。レーザー光を吸収して加熱される金属材料からなる第一の被接合体７とこの第一の被接合体７からの熱伝導により加熱される金属からなる第二の被接合体８とが重ね合わせられている。次に、二次元方向に走査されるレンズ系を備えたレーザー光照射装置３’により第一の被接合体７側から同被接合体７に対してレーザー光３を照射することとなるが、この場合、従来からのレンズ系を通して真直ぐにレーザー光３を照射する方式では、被接合体と一体に形成されている製品本体部分（図示されていない）がレーザー光３を干渉してしまうので、レーザー光偏向部材５を前記第一の被接合体７とレーザー光照射装置３’のレンズ系との間に配設する。このように構成することにより、レーザー光が干渉されない位置で走査されるレーザー光照射装置３’からのレーザー光３をレーザー光偏向部材５により屈折させてその照射位置を調整することにより第一の被接合体７へのレーザー光３の照射を簡単且つ確実に行うことができる。なお、レーザー光偏向部材５は第一実施形態で使用したものと同様でありここでは重複した説明は省略する。   Next, a second embodiment of the present invention will be described based on FIG. The second embodiment particularly relates to a technique for joining metal materials together with laser light. A first bonded body 7 made of a metal material that is heated by absorbing laser light and a second bonded body 8 made of a metal that are heated by heat conduction from the first bonded body 7 overlap each other. It is matched. Next, the laser beam 3 is irradiated to the bonded body 7 from the first bonded body 7 side by the laser beam irradiation apparatus 3 ′ having a lens system scanned in a two-dimensional direction. In this case, in the method of irradiating the laser beam 3 straight through the conventional lens system, the product main body part (not shown) formed integrally with the joined body interferes with the laser beam 3, The laser beam deflecting member 5 is disposed between the first bonded body 7 and the lens system of the laser beam irradiation device 3 ′. With this configuration, the laser beam 3 from the laser beam irradiation device 3 ′ scanned at a position where the laser beam is not interfered is refracted by the laser beam deflecting member 5 and the irradiation position is adjusted to adjust the first irradiation position. Irradiation of the laser beam 3 to the bonded body 7 can be performed easily and reliably. The laser beam deflecting member 5 is the same as that used in the first embodiment, and a duplicate description is omitted here.

次に、図５に基づいて、本発明の第三の実施形態について説明する。第三の実施形態は、特に、金属材料相互をレーザー光により接合する技術に関するものである。レーザー光を吸収して加熱される金属材料からなる第一及び第二の被接合体７、８がその端部即ち接合面９を突き合わせて配置されている。次に、二次元方向に走査されるレンズ系を備えたレーザー光照射装置３’によりこの接合部9に対してレーザー光３を照射することとなるが、この場合、従来からのレンズ系を通して真直ぐにレーザー光３を照射する方式では、被接合体と一体に形成されている製品本体部分（図示されていない）がレーザー光３を干渉してしまうので、レーザー光偏向部材５を前記接合部９とレーザー光照射装置３’のレンズ系との間に配設する。このように構成することにより、レーザー光が干渉されない位置で走査されるレーザー光照射装置３’からのレーザー光３をレーザー光偏向部材５により屈折させてその照射位置を調整することにより第一、第二の両被接合体７，８の接合部９へのレーザー光３の照射を簡単且つ確実に行うことができる。なお、レーザー光偏向部材５は第一実施形態で使用したものと同様でありここでは重複した説明は省略する。   Next, a third embodiment of the present invention will be described based on FIG. The third embodiment particularly relates to a technique for joining metal materials together by laser light. First and second objects to be joined 7 and 8 made of a metal material that is heated by absorbing laser light are disposed so as to abut the end portions, that is, the joining surfaces 9 thereof. Next, the laser beam 3 is irradiated to the joint 9 by the laser beam irradiation device 3 ′ having a lens system scanned in a two-dimensional direction. In this case, the laser beam 3 is straightened through the conventional lens system. In the method of irradiating the laser beam 3, the product body portion (not shown) formed integrally with the object to be bonded interferes with the laser beam 3, so that the laser beam deflecting member 5 is connected to the bonding portion 9 as described above. And the lens system of the laser beam irradiation device 3 ′. By configuring in this way, the laser beam 3 from the laser beam irradiation device 3 ′ scanned at a position where the laser beam is not interfered is refracted by the laser beam deflecting member 5 to adjust the irradiation position, Irradiation of the laser beam 3 to the joint portion 9 of the second both bodies 7 and 8 can be performed easily and reliably. The laser beam deflecting member 5 is the same as that used in the first embodiment, and a duplicate description is omitted here.

以上、説明したように、本発明によれば、樹脂同士或いは金属同士の被接合体をレーザー光により接合するに際し、従来からの二次元方向に走査されるレンズ系を通して真直ぐにレーザー光を照射する方式では、照射対象物の構造上の事情などによりレーザー光が干渉されてしまうような場合に、特に長焦点構造のレーザー光や多関節ロボットなどの高価な設備を使用することなく、レーザー光の屈折効果を利用したレーザー光偏向部材を接合部とレーザー光照射装置のレンズ系との間に配列するのみで、レーザー光が干渉されない位置で走査されるレーザー光照射装置３’からのレーザー光をレーザー光偏向部材５により屈折させてその照射位置を調整することにより、その接合部へのレーザー光の照射を簡単且つ確実に行うことができるという効果を奏するものである。   As described above, according to the present invention, when joining objects to be bonded between resins or metals with a laser beam, the laser beam is irradiated straight through a conventional lens system scanned in a two-dimensional direction. In this method, when laser light is interfered due to structural circumstances of the irradiation object, laser light can be emitted without using expensive equipment such as a laser beam with a long focal structure or an articulated robot. The laser beam from the laser beam irradiation device 3 ′ scanned at a position where the laser beam is not interfered only by arranging the laser beam deflecting member utilizing the refraction effect between the joint portion and the lens system of the laser beam irradiation device. By refracting by the laser beam deflecting member 5 and adjusting the irradiation position, the laser beam can be easily and reliably irradiated to the joint. One in which the effect say.

（a）は、従来例の長焦点構造のレーザー光を使用した特に樹脂材料対象のレーザー光接合方法の説明図である。（ｂ）は、接合部を中心とした拡大図である。(A) is explanatory drawing of the laser beam joining method especially for resin material object which uses the laser beam of the long focal structure of a prior art example. (B) is an enlarged view centering on a junction part. 従来例の多関節ロボットを使用したレーザー光接合方法の説明図である。It is explanatory drawing of the laser beam joining method using the articulated robot of a prior art example. 本発明の第一の実施形態に係るレーザー光接合方法の説明図である。It is explanatory drawing of the laser beam joining method which concerns on 1st embodiment of this invention. 本発明の第二の実施形態に係るレーザー光接合方法の説明図である。It is explanatory drawing of the laser beam joining method which concerns on 2nd embodiment of this invention. 本発明の第三の実施形態に係るレーザー光接合方法の説明図である。It is explanatory drawing of the laser beam joining method which concerns on 3rd embodiment of this invention.

符号の説明Explanation of symbols

１ レーザー光を透過する被接合体
１’ 被接合体１と一体の製品本体部分
２ レーザー光を吸収する被接合体
３ レーザー光
３’ レーザー光照射装置（レンズ系を含む）
４ 接合部、（第一実施形態）
５ レーザー光偏向部材（透明版）
５a レーザー光偏向部材の偏向部
５ｂ レーザー光偏向部材の基部
６ 多関節ロボット
７，８ 被接合体（第二、三実施形態）
９ 接合部、（第二、三実施形態） DESCRIPTION OF SYMBOLS 1 To-be-joined body which permeate | transmits laser light 1 'Product main body part integrated with to-be-joined body 1 2 To-be-joined body which absorbs laser light 3 Laser light 3' Laser light irradiation apparatus (a lens system is included)
4 joints (first embodiment)
5 Laser beam deflecting member (transparent plate)
5a Deflection part of laser beam deflecting member 5b Base part of laser beam deflecting member 6 Articulated robot 7, 8 Body to be joined (second and third embodiments)
9 joints (second and third embodiments)

Claims (6)

レーザー光を透過する第一の被接合体とレーザー光を吸収して加熱される第二の被接合体とを重ね合わせた後、前記第一の被接合体側から前期重ね合わせた面に対してレーザー光を照射して両被接合体を接合するレーザー接合方法において、前記第一の被接合体とレーザー光照射装置のレンズ系との間にレーザー光偏向部材を配設することによりレーザー光の照射位置を調整することを特徴とするレーザー接合方法。   After superimposing the first object to be laser-transmitted and the second object to be heated that absorbs the laser light and then superimposing the previous object from the first object to be bonded side, In the laser joining method of joining both objects to be joined by irradiating laser light, a laser light deflecting member is disposed between the first object to be joined and the lens system of the laser light irradiating apparatus, thereby A laser bonding method characterized by adjusting an irradiation position. 前記レンズ系は、二次元方向に走査されるレンズ系であることを特徴とする請求項１に記載のレーザー接合方法。   The laser joining method according to claim 1, wherein the lens system is a lens system scanned in a two-dimensional direction. 前記レーザー光偏向部材は、前記第一の被接合体を押圧する機能を備えるように構成されていることを特徴とする請求項１または２に記載のレーザー接合方法。   3. The laser joining method according to claim 1, wherein the laser beam deflecting member is configured to have a function of pressing the first object to be joined. レーザー光を吸収して加熱される第一の被接合体と前記第一の被接合体からの熱伝導により加熱される第二の被接合体とを重ね合わせた後、前記第一の被接合体側から前記第一の被接合体に対してレーザー光を照射して両被接合体を接合するレーザー接合方法において、前記第一の被接合体とレーザー光照射装置のレンズ系との間にレーザー光偏向部材を配設することによりレーザー光の照射位置を調整することを特徴とするレーザー接合方法。   After superimposing the first object to be heated that absorbs the laser beam and the second object to be heated by heat conduction from the first object to be bonded, the first object to be bonded In a laser bonding method in which a laser beam is irradiated from the body side to the first object to be bonded to join both objects to be bonded, a laser is provided between the first object to be bonded and the lens system of the laser beam irradiation apparatus. A laser bonding method comprising adjusting an irradiation position of a laser beam by disposing a light deflection member. レーザー光を吸収して加熱される二つの被接合体のそれぞれの端部を突合わせた後、前記突合せ部にレーザー光を照射して両被接合体を接合するレーザー接合方法において、前記両被接合体の前記突合せ部とレーザー光照射装置のレンズ系との間にレーザー光偏向部材を配設することによりレーザー光の照射位置を調整することを特徴とするレーザー接合方法。   In the laser bonding method of joining the two objects to be bonded by irradiating the laser light to the butted parts after the ends of the two objects to be bonded that are heated by absorbing laser light are butted. A laser bonding method comprising adjusting a laser beam irradiation position by disposing a laser beam deflecting member between the butted portion of the bonded body and a lens system of a laser beam irradiation apparatus. 前記レンズ系は、二次元方向に走査されるレンズ系であることを特徴とする請求項４または５に記載のレーザー接合方法。   6. The laser bonding method according to claim 4, wherein the lens system is a lens system that is scanned in a two-dimensional direction.
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