JP3881246B2 - Resin welding jig mounted on laser processing machine and resin welding method using the same - Google Patents

Resin welding jig mounted on laser processing machine and resin welding method using the same Download PDF

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JP3881246B2
JP3881246B2 JP2002004787A JP2002004787A JP3881246B2 JP 3881246 B2 JP3881246 B2 JP 3881246B2 JP 2002004787 A JP2002004787 A JP 2002004787A JP 2002004787 A JP2002004787 A JP 2002004787A JP 3881246 B2 JP3881246 B2 JP 3881246B2
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resin
welding
laser processing
welding rod
processing machine
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JP2003205550A (en
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寿一 吉川
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寿一 吉川
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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
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
    • B29C65/1658—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined scanning once, e.g. contour 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
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B29C65/12—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined and welding bar
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/72—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
    • B29C66/03—After-treatments in the joint area
    • B29C66/034—Thermal after-treatments
    • B29C66/0342—Cooling, e.g. transporting through welding and cooling zone
    • 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
    • B29C66/434—Joining substantially flat articles for forming corner connections, fork connections or cross connections
    • B29C66/4342—Joining substantially flat articles for forming corner connections, e.g. for making V-shaped pieces
    • B29C66/43421—Joining substantially flat articles for forming corner connections, e.g. for making V-shaped pieces with a right angle, e.g. for making L-shaped pieces
    • 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
    • B29C66/814—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 design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81423—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being concave
    • 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
    • B29C66/8362—Rollers, cylinders or drums moving relative to and tangentially to 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
    • 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
    • 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
    • B29C65/1632—Laser beams characterised by the way of heating the interface direct heating the surfaces 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
    • B29C66/70—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
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges

Description

【０００１】
【発明の属する技術分野】
本発明はレーザ加工機に装着される樹脂溶着治具およびそれを用いた樹脂溶着方法に係わり、特にポリプロピレン樹脂、ポリエチレン樹脂等を溶着するためのレーザ加工機に装着される樹脂溶着治具およびそれを用いた樹脂溶着方法に関するものである。
【０００２】
【従来の技術】
従来、レーザ加工機は制御装置による制御で、金属の穴あけ、切断、溶接を自動化し、金属加工を容易にしている。
【０００３】
我々の身の回りは、金属加工品も多数あるが、樹脂加工品も多数ある。
【０００４】
特に自動車部品等において軽量化が求められるなか、大量生産製品としてポリプロピレン樹脂、ポリエチレン樹脂製のバンパー、ボンネット、フェンダー、トランク、ドア外部、ガソリンタンク、インダッシュパネル、フロントスポイラー、リヤーウイング等は射出成型された樹脂加工部品が採用されている。これらは射出成型された後に後加工として溶接を要する部分が多くあるが、金属加工のような機械による溶接は皆無であって、手作業による圧着が主流である。
【０００５】
従来の手作業による樹脂圧着には、図４に示すような、熱風が送られる管３０と、溶接棒５が挿通される管２０と、溶けた樹脂を圧着するへら部４０を備えた治具１００が用いられている。
【０００６】
図６に示すように、溶接される樹脂８と同質の溶接棒５（樹脂溶接棒５、以下同じ）を管２０に挿通し、治具１００の管３０を溶接機の支持管９０に連結し、ヒーター及びファンからなる溶接機の本体９１から管９２を通して熱風を治具１００に送り、樹脂８に接する溶接棒５の先端と樹脂８の圧着すべき部分とを加熱しながら、支持管９０を持って治具１００を矢印方向に動かす。その際、へら部４０で溶けた溶接棒５の先端と樹脂８の圧着すべき部分とを押しつけながら動かす。
【０００７】
図４および図６は樹脂８を１平面のみ表したが、実際の圧着は図５に示すように、樹脂８１と樹脂８２とを所望の型になるよう合わせ、合わせた個所に溶接棒５を当て、樹脂８１、樹脂８２、溶接棒５とが溶かされて一体となった状態をへら部４０で押さえながら樹脂８１と樹脂８２とを溶着してゆく。
【０００８】
【発明が解決しようとする課題】
上述の自動車部品等に採用されているポリプロピレン樹脂、ポリエチレン樹脂の溶接は、硬質及び軟質塩化ビニール樹脂の溶接とは異なり、圧着をしながら溶接をするものであり、溶接機はヒーターとファンが一体式に構成されているため、熱源の調節ができず、溶接棒５および樹脂８等の温度が低下するまで溶接ができないため溶接速度が遅い（０．３〜０．４m／分）という難点がある上、溶接のタイミングをつかみ圧着力をコントロールする勘が求められるので、溶接ができるのは極少数の特殊技能者のみであるという難点がある。
【０００９】
更に、極少数の特殊技能者が行ってさえ、へら部４０に妨げられて溶接棒５が角部には届かないためピンホールができやすく、直角部分にはクラックが生じる、接合する個々の部分に熱が均等に伝わらず密着していない等のトラブルが多く、１００個につき約３０が不良品となっている。そのうえ、製造した部分がすぐには不良品として判断されず、５工程も先に進んでから廃棄処分されることが多く、そこに至るまで次々と付加加工が行われるため、多大な時間と費用が無駄になるという難点もある。
【００１０】
また、外気温が−３℃以下の条件では圧着加工が不可能という欠点もある。
【００１１】
一部に実施されている高周波を利用した振動溶接は、設備に多大な費用がかかるばかりでなく、単純な直線的平面同志の溶接のみが対象であって、曲線や直角部を有する個所、その他複雑な形状物の溶接は不可能である。
【００１２】
軽量化が求められる自動車部品等をはじめとする樹脂加工品の製造において、射出成型された部品に対する後加工として溶接を機械化し、特別の熟練技術がなくてもロスなく樹脂溶接を行うことができる方法の開発が求められていた。
【００１３】
また、現在レーザによる切断加工の対象となる樹脂はアクリル樹脂、べ一クライトの２種類だけで、ポリプロピレン樹脂・ポリエチレン樹脂等の切断加工は行われていない。これ等樹脂の切断加工は、作業員が電動工具（ジグソー）で切断し、穴明加工時にカッターを使用している為、樹脂の収縮が原因で、切断面が平面に対し直角に穴が明けられないという難点があった。インダッシュパネル等に使用しているＡＢＳ樹脂の切断は、ウォータージェットにより切断を行っているが、ウォータージェットの発射ノズル自体が水圧により消耗してしまい、使用する水にＡＢＳ樹脂の粉が大量に混入し、発射ノズルに目詰りを引き起こし、メンテナンスを必要とすると共に水の交換が必要で、交換した水は、産業廃棄物として廃棄費用がかかる等環境問題も発生している。
【００１４】
本願出願人は、金属の切断、溶接に優れた機能を発揮しているレーザ加工機を用いて、樹脂も同様に切断、溶接できるのではないかと鋭意研究を重ね、本発明に至ったものである。なお、レーザを用い平面的な樹脂部材同士を重ね合わせて溶着する方法は特開２００１−２３２６８７号に認められるが、レーザを用いた立体的な樹脂溶接は皆無である。
【００１５】
本発明は、上記従来の難点を解決するためになされたもので、レーザ加工機を用いてポリプロピレン、ポリエチレン等の樹脂切断、樹脂溶着加工を行い、樹脂の切断、溶着を自動化可能とするレーザ加工機に装着される樹脂溶着治具およびそれを用いた樹脂溶着方法を提供することを目的とする。
【００１６】
【課題を解決するための手段】
上記の目的を達成するために、本発明によるレーザ加工機に装着される樹脂溶着治具は、レーザ加工機を用いて樹脂を溶着するためのレーザ加工機に装着される樹脂溶着治具であって、レーザ加工機のレーザ加工ヘッドノズルに固定され溶接棒が挿入される溶接棒支持管と、樹脂および溶接棒が溶けあった溶融部を圧着して溶着するローラと、溶融部を冷却する冷却用エアが導入される冷却用エア導入管とを備えている。
【００１７】
また、本発明によるレーザ加工機に装着される樹脂溶着治具は、レーザ加工機のエア供給部から供給されるエアを加熱して得られる熱風を導入するための熱風導入管を備えている。
【００１８】
さらに、本発明によるレーザ加工機に装着される樹脂溶着治具は、溶接棒支持管は、この溶接棒支持管が挿通固定される溶接棒支持管挿通固定部とレーザ加工ヘッドノズルが挿通固定されるノズル挿通固定部とを備え、溶接棒支持管とレーザ加工ヘッドノズルとを連結固定する管・ノズル連結固定具を備えている。
【００１９】
本発明によれば、レーザ加工機を用いて樹脂を溶着するための樹脂溶着方法において、レーザ加工機のレーザ加工ヘッドノズルに固定され溶接棒が挿入される溶接棒支持管と、樹脂および溶接棒が溶けあった溶融部を圧着して溶着するローラと、溶融部を冷却する冷却用エアが導入される冷却用エア導入管とを備えたレーザ加工機に装着される樹脂溶着治具を用い、溶接棒支持管をレーザ加工ヘッドノズルに固定し、レーザ加工ヘッドノズルから樹脂にレーザ光線を照射し、レーザ光線により樹脂および溶接棒が溶けあった溶融部をローラで押圧しローラを移動しながら冷却用エア導入管から冷却用エアを供給して冷却し、樹脂を溶着するものである。
【００２０】
さらに、本発明によれば、レーザ加工機を用いて樹脂を溶着するための樹脂溶着方法において、レーザ加工機のレーザ加工ヘッドノズルに固定され溶接棒が挿入される溶接棒支持管と、樹脂および溶接棒が溶けあった溶融部を圧着して溶着するローラと、溶融部を冷却する冷却用エアが導入される冷却用エア導入管とを備えたレーザ加工機に装着される樹脂溶着治具を用い、溶接棒支持管をレーザ加工ヘッドノズルに固定し、レーザ加工機のエア供給部から供給されるエアを加熱して得られる熱風を熱風導入管に導入し、熱風を樹脂に吹きつけ熱風により樹脂および溶接棒が溶けあった溶融部をローラで押圧しローラを移動しながら冷却用エア導入管から冷却用エアを供給して冷却し、樹脂を溶着するものである。
【００２１】
また、本発明によれば、レーザ加工機を用いて樹脂を溶着するための樹脂溶着方法において、レーザ加工機のレーザ加工ヘッドノズルに固定され溶接棒が挿入される溶接棒支持管と、樹脂および溶接棒が溶けあった溶融部を圧着して溶着するローラと、溶融部を冷却する冷却用エアが導入される冷却用エア導入管とを備えたレーザ加工機に装着される樹脂溶着治具を用い、溶接棒支持管を、レーザ加工機のエア供給部から供給されるエアを加熱して得られる熱風を導入する熱風導入支持管に固定し、熱風導入支持管から熱風を樹脂に吹きつけ、熱風により樹脂および溶接棒が溶けあった溶融部をローラで押圧しローラを移動しながら冷却用エア導入管から冷却用エアを供給して冷却し、樹脂を溶着するものである。
【００２２】
このような本発明によるレーザ加工機に装着される樹脂溶着治具およびそれを用いた樹脂溶着方法によれば、レーザ加工機の制御で、樹脂の切断、溶接が自動化され、ロスのない樹脂加工が実現される。
【００２３】
【発明の実施の形態】
以下、本発明によるレーザ加工機に装着される樹脂溶着治具およびそれを用いた樹脂溶着方法の実施の形態例について図面を参照して詳述する。
【００２４】
本発明によるレーザ加工機に装着される樹脂溶着治具は、図１（ａ）に示すように、レーザ加工機（図示せず）を用いて樹脂８を溶着するためのレーザ加工機に装着される樹脂溶着治具１０であって、レーザ加工機のレーザ加工ヘッドノズル９に固定され溶接棒５が挿入される溶接棒支持管２と、樹脂８および溶接棒５が溶けあった溶融部Ｈを圧着して溶着するローラ４と、溶融部Ｈを冷却する冷却用エアが導入される冷却用エア導入管１と、ローラ４の進行方向後方に溶接棒５を切断するための切断歯６２を備えている。ローラ４の径は加工対象樹脂の形状や選択される溶接棒５の太さによって適宜選択される。この冷却用エア導入管１は、レーザ加工機が備えている公知の強制冷却エア供給部に管（図示せず）で連結される。
【００２５】
同図（ｂ）に示すように、ローラ４は溶接棒５が半分入って逃がさずきれいに押し込みができるよう、断面が緩やかなＵ字形に構成され、治具本体６にねじ６１等で軸支される。
【００２６】
樹脂溶着治具１０とレーザ加工ヘッドノズル９との固定は、図１（ａ）のように固定具７‘としてバンドでも好適であるが、同図（ｃ）に示すように、溶接棒支持管２が挿通固定される溶接棒支持管挿通固定部７２とレーザ加工ヘッドノズル９が挿通固定されるノズル挿通固定部７９とを備え溶接棒支持管２とレーザ加工ヘッドノズル９とを連結固定する管・ノズル連結固定具７を用いるとより好適である。
【００２７】
管・ノズル連結固定具７による溶接棒支持管２とレーザ加工ヘッドノズル９の固定は、溶接棒支持管挿通固定部７２とノズル挿通固定部７９が連結状態または一体的なので、溶接棒支持管２とレーザ加工ヘッドノズル９を挿通して、管・ノズル連結固定具７のひれ部７０に採用されるボタン式の篏着、ねじ止め等によって行われる。
【００２８】
本発明によるレーザ加工機に装着される樹脂溶着治具は、図２に示すように、レーザ加工機のレーザ加工ヘッドノズル９に固定され溶接棒５が挿入される溶接棒支持管２と、樹脂８および溶接棒５が溶けあった溶融部Ｈを圧着して溶着するローラ４と、溶融部Ｈを冷却する冷却用エアが導入される冷却用エア導入管１と、レーザ加工機のエア供給部から供給されるエアを加熱して得られる熱風を導入するための熱風導入管３を備えている。この熱風導入管３は、レーザ加工機が備えている公知の強制冷却エア供給部に管（図示せず）で連結され、エア供給部と熱風導入管３との間に公知のヒータを挿入してエアを熱風にしている。
【００２９】
なお、本発明のレーザ加工機に装着される樹脂溶着治具１０は、放熱性の高いアルミやセラミックで構成されるのが望ましい。
【００３０】
本発明によるレーザ加工機に装着される樹脂溶着治具を用いた樹脂溶着方法は、ＹＡＧレーザ切断機の出力を下げてレーザ光線を使用するもので、図３に示すように、レーザ加工機に装着される樹脂溶着治具１０の溶接棒支持管２をレーザ加工ヘッドノズル９に固定し、レーザ加工ヘッドノズル９の先端からポリプロピレン樹脂、ポリエチレン樹脂等の樹脂８にレーザ光線を照射し、レーザ光線により樹脂８および溶接棒５が溶けあった溶融部Ｈをローラ４で押圧しながらローラ４を移動させる。同時に冷却用エア導入管１から冷却用エアを供給して圧着された溶融部Ｈを冷却し、樹脂８１と樹脂８２とを溶着する。なお、レーザ光線照射に際しては、樹脂８から１０ｍｍ〜５０ｍｍ離し、かつレーザ光線を１点に集中させず、５ｍｍ〜１０ｍｍ幅になるよう照射する。樹脂８とノズル９の先端の距離は、樹脂８の厚さや溶接棒５の形状により適宜選択される。
【００３１】
また、本発明によるレーザ加工機に装着される樹脂溶着治具を用いた樹脂溶着方法は、図２（ａ）に示すように、レーザ加工機に装着される樹脂溶着治具１０の溶接棒支持管２をレーザ加工ヘッドノズル９に固定し、熱風導入管３にレーザ加工機が備えているエア供給部から供給されるエアをヒータで加熱して得られる熱風を導入し、熱風を樹脂８に吹きつけ、熱風により樹脂８および溶接棒５が溶けあった溶融部Ｈをローラ４で押圧しながらローラ４を移動させ冷却用エア導入管１から冷却用エアを供給して冷却し、樹脂８を溶着するものである。ポリプロピレン樹脂、ポリエチレン樹脂等を溶接する際の熱風は、ヒーターを加熱して１８０℃〜２５０℃にしたものである。
【００３２】
なお、図２（ｂ）に示すように、レーザ加工機に装着される樹脂溶着治具１０の溶接棒支持管２を、レーザ加工機が備えているエア供給部から供給されるエアをヒータで加熱して得られる熱風を導入する熱風導入管端部３１に固定し、熱風導入支持管３１に供給された熱風を樹脂８に吹きつけ、熱風により樹脂８および溶接棒５が溶けあった溶融部Ｈをローラ４で押圧しながらローラ４を移動させ冷却用エア導入管１から冷却用エアを供給して冷却し、樹脂８を溶着するものである。
【００３３】
このようなレーザ発射を行わず、強制冷却用エアーを分岐し、１００Ｖの熱源ヒータで冷却用エアーを１８０℃〜２５０℃に暖めた熱風を利用して樹脂を加熱する方法によれば、省エネ化がはかられる。
【００３４】
樹脂８と樹脂溶接棒５の溶融部Ｈは、レーザ光線照射あるいは熱風の吹きつけによってまず樹脂８の表面が溶かされ、その反射熱を利用して溶接棒５が溶かされて得られるので、レーザ加工機のあらかじめ設定された動作で溶融部Ｈにローラ４を用いて０．３ｋｇ〜０．５ｋｇの圧力を掛けながらローラ４を移動させる。冷却用エア導入管１から強制冷却用エアを供給して冷却し、溶融部Ｈを短時間で圧着させ、レーザ加工機のロボットアームを停止させ、３ｍｍ〜５ｍｍ垂直に下げ、切断歯６２によって溶接棒５を切断し、ロボットアームを３ｍｍ〜５ｍｍ垂直に上げて作業を終了する。作業速度は１．５ｍ／分前後まで高速化される。
【００３５】
なお、ポリプロピレン樹脂、ポリエチレン樹脂、ＡＢＳ樹脂等の切断加工にレーザ切断機が使用されていない理由として、レーザの熱により有毒ガスの発生が考えられていたが、ポリプロピレン樹脂、ポリエチレン樹脂をレーザ切断機で切断し、環境管理センターにガスの採取及び分析を依頼、ガスは無害との結果がえられている（表１〜１５）ので、必要に応じ、レーザ加工機で樹脂を切断後、引き続いて樹脂溶着を行い、極少数の特殊技能者に頼っていたポリプロピレン樹脂、ポリエチレン樹脂等の切断溶接加工が自動化される。
【００３６】
本発明によって、樹脂の切断溶接加工が自動化がされ、それに伴って、従来の圧着加工ライン全長約１０ｍ以上を１／２に縮小できると共に作業者の削減、圧着加工ラインの設備費用及びランニング費用の削減もはかられる。
【００３７】
【表１】

Figure 0003881246
【００３８】
【表２】
Figure 0003881246
【００３９】
【表３】
Figure 0003881246
【００４０】
【表４】
Figure 0003881246
【００４１】
【表５】
Figure 0003881246
【００４２】
【表６】
Figure 0003881246
【００４３】
【表７】
Figure 0003881246
【００４４】
【表８】
Figure 0003881246
【００４５】
【表９】
Figure 0003881246
【００４６】
【表１０】
Figure 0003881246
【００４７】
【表１１】
Figure 0003881246
【００４８】
【表１２】
Figure 0003881246
【００４９】
【表１３】
Figure 0003881246
【００５０】
【表１４】
Figure 0003881246
【００５１】
【表１５】
Figure 0003881246
【００５２】
【発明の効果】
以上の説明からも明らかなように、本発明によるレーザ加工機に装着される樹脂溶着治具それを用いた樹脂溶着方法によれば、レーザ加工機の制御で、樹脂の切断、溶接が自動化され、複雑な形状物の接合が可能となり、しかも密着不良、ピンホール、クラック等の現象を大幅に削減し、加工ラインの縮小、作業者の削減、設備費用及びランニング費用の削減が図られる。
【図面の簡単な説明】
【図１】 本発明によるレーザ加工機に装着される樹脂溶着治具を示した図で、（ａ）は全体図、（ｂ）はローラ拡大図、（ｃ）は樹脂溶着治具に附属する管・ノズル連結固定具を示す図である。
【図２】 （ａ）、（ｂ）は共に本発明によるレーザ加工機に装着される樹脂溶着治具の他の実施例を示した図である。
【図３】本発明によるレーザ加工機に装着される樹脂溶着治具を使用した樹脂溶着方法を示した図である。
【図４】従来の樹脂溶着時に使用される治具を示した図である。
【図５】 従来の治具による樹脂溶着を示した図である。
【図６】 従来の治具を使用した樹脂溶着方法を示した図である。
【符号の説明】
１．．．冷却用エア導入管
２．．．溶接棒支持管
３．．．熱風導入管
３１．．．熱風導入支持管
４．．．ローラ
５．．．溶接棒
７．．．管・ノズル連結固定具
７２．．．溶接棒支持管挿通固定部
７９．．．ノズル挿通固定部
８．．．樹脂
９．．．レーザ加工ヘッドノズル
１０．．．樹脂溶着治具
Ｈ．．．溶融部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a resin welding jig to be mounted on a laser processing machine and a resin welding method using the same, and more particularly to a resin welding jig to be mounted on a laser processing machine for welding polypropylene resin, polyethylene resin, and the like. The present invention relates to a resin welding method using the above.
[0002]
[Prior art]
Conventionally, laser processing machines are controlled by a control device to automate metal drilling, cutting, and welding to facilitate metal processing.
[0003]
There are many metal processed products around us, but there are also many resin processed products.
[0004]
In light of the demand for weight reduction in automobile parts, etc., polypropylene resin, polyethylene resin bumpers, bonnets, fenders, trunks, door exteriors, gasoline tanks, in-dash panels, front spoilers, rear wings, etc. were injection molded as mass-produced products. Resin processed parts are used. Many of these parts require welding as post-processing after injection molding, but there is no welding by a machine such as metal processing, and manual crimping is the mainstream.
[0005]
As shown in FIG. 4, the conventional manual crimping of the resin includes a tube 30 through which hot air is sent, a tube 20 through which the welding rod 5 is inserted, and a spatula 40 for crimping the melted resin. 100 is used.
[0006]
As shown in FIG. 6, a welding rod 5 (resin welding rod 5, hereinafter the same) of the same quality as the resin 8 to be welded is inserted into the tube 20, and the tube 30 of the jig 100 is connected to the support tube 90 of the welding machine. Then, hot air is sent from the main body 91 of the welding machine consisting of a heater and a fan through the pipe 92 to the jig 100 to heat the tip of the welding rod 5 in contact with the resin 8 and the portion to be pressure-bonded of the resin 8, while Hold the jig 100 and move it in the direction of the arrow. At that time, the tip of the welding rod 5 melted by the spatula 40 and the portion of the resin 8 to be pressed are pressed and moved.
[0007]
4 and 6 show only one plane of the resin 8, but as shown in FIG. 5, the actual crimping is performed by matching the resin 81 and the resin 82 into a desired mold, and placing the welding rod 5 at the combined location. The resin 81, the resin 82, and the welding rod 5 are melted and integrated, and the resin 81 and the resin 82 are welded while pressing the spatula portion 40.
[0008]
[Problems to be solved by the invention]
Unlike the welding of hard and soft vinyl chloride resin, the welding of polypropylene resin and polyethylene resin used in the above-mentioned automotive parts, etc. is performed while crimping, and the welding machine is integrated with a heater and a fan. Since the heat source cannot be adjusted due to the equation, welding cannot be performed until the temperature of the welding rod 5 and the resin 8 is lowered, so that the welding speed is slow (0.3 to 0.4 m / min). In addition, since there is a need for grasping the timing of welding and controlling the crimping force, there is a difficulty that only a very small number of special technicians can perform welding.
[0009]
Further, even if a very small number of special technicians are performed, the spatula 40 prevents the welding rod 5 from reaching the corners, so that pinholes are easily formed, and cracks occur at the right angle parts. There are many troubles such as heat being not evenly transmitted and not being in close contact, and about 30 out of 100 are defective. In addition, the manufactured part is not immediately judged as a defective product, and is often discarded after 5 processes have been advanced. There is also a disadvantage that is wasted.
[0010]
In addition, there is a disadvantage that crimping is not possible under conditions where the outside air temperature is −3 ° C. or lower.
[0011]
The vibration welding using high frequency, which is performed in some parts, is not only costly for equipment, but also for simple straight flat surface welding, where there are curves and right angles, etc. It is impossible to weld complex shapes.
[0012]
In the manufacture of resin processed products such as automobile parts that require weight reduction, welding can be mechanized as post-processing for injection molded parts, and resin welding can be performed without loss even without special skill. There was a need to develop a method.
[0013]
Currently, there are only two types of resin that can be cut by a laser, acrylic resin and belite, and no cutting of polypropylene resin or polyethylene resin has been performed. In the cutting process of these resins, the operator cuts with an electric tool (jigsaw) and uses a cutter at the time of drilling, so the cut surface is drilled at right angles to the plane due to resin shrinkage. There was a difficulty that was not possible. The ABS resin used for in-dash panels is cut with a water jet, but the water jet firing nozzle itself is consumed by water pressure, and a large amount of ABS resin powder is mixed into the water used. However, the launch nozzle is clogged, maintenance is required and water needs to be exchanged, and the exchanged water also has environmental problems such as disposal costs as industrial waste.
[0014]
The applicant of the present application has intensively studied whether a resin can be cut and welded in the same manner by using a laser processing machine that exhibits excellent functions for cutting and welding metals, and has reached the present invention. is there. In addition, although the method of superimposing and welding planar resin members using a laser is recognized by Unexamined-Japanese-Patent No. 2001-232687, there is no three-dimensional resin welding using a laser.
[0015]
The present invention was made in order to solve the above-mentioned conventional problems, and laser processing that makes it possible to automate resin cutting and welding by performing resin cutting and resin welding processing of polypropylene and polyethylene using a laser processing machine. It aims at providing the resin welding jig | tool with which a machine is mounted | worn, and the resin welding method using the same.
[0016]
[Means for Solving the Problems]
In order to achieve the above object, the resin welding jig attached to the laser processing machine according to the present invention is a resin welding jig attached to the laser processing machine for welding the resin using the laser processing machine. A welding rod support tube that is fixed to the laser machining head nozzle of the laser beam machine and into which the welding rod is inserted, a roller that crimps and welds the molten portion in which the resin and the welding rod are melted, and cooling that cools the molten portion A cooling air introduction pipe into which the working air is introduced.
[0017]
Moreover, the resin welding jig mounted on the laser processing machine according to the present invention includes a hot air introduction tube for introducing hot air obtained by heating air supplied from an air supply unit of the laser processing machine.
[0018]
Further, the resin welding jig mounted on the laser beam machine according to the present invention is such that the welding rod support tube has a welding rod support tube insertion fixing portion into which the welding rod support tube is inserted and fixed, and a laser processing head nozzle is inserted and fixed. And a nozzle / nozzle coupling fixture for coupling and fixing the welding rod support pipe and the laser processing head nozzle.
[0019]
According to the present invention, in a resin welding method for welding resin using a laser processing machine, a welding rod support tube that is fixed to a laser processing head nozzle of the laser processing machine and into which a welding rod is inserted, the resin and the welding rod Using a resin welding jig attached to a laser processing machine equipped with a roller that crimps and welds the melted portion where the melted, and a cooling air introduction pipe into which cooling air for cooling the melted portion is introduced , Fix the welding rod support tube to the laser processing head nozzle, irradiate the resin with a laser beam from the laser processing head nozzle, press the molten part where the resin and welding rod were melted by the laser beam, and cool the roller while moving it. Cooling air is supplied from the air introduction pipe for cooling and the resin is welded.
[0020]
Furthermore, according to the present invention, in a resin welding method for welding a resin using a laser processing machine, a welding rod support tube that is fixed to a laser processing head nozzle of the laser processing machine and into which a welding rod is inserted, a resin and A resin welding jig to be mounted on a laser processing machine having a roller for crimping and welding a melted portion where a welding rod has been melted, and a cooling air introduction pipe into which cooling air for cooling the melted portion is introduced. The welding rod support tube is fixed to the laser processing head nozzle, hot air obtained by heating the air supplied from the air supply unit of the laser processing machine is introduced into the hot air introduction tube , hot air is blown against the resin, The melted portion where the resin and the welding rod are melted is pressed by a roller and cooled by supplying cooling air from a cooling air introduction tube while moving the roller, thereby welding the resin.
[0021]
Further, according to the present invention, in a resin welding method for welding resin using a laser processing machine, a welding rod support tube that is fixed to a laser processing head nozzle of the laser processing machine and into which a welding rod is inserted, a resin and A resin welding jig to be mounted on a laser processing machine having a roller for crimping and welding a melted portion where a welding rod has been melted, and a cooling air introduction pipe into which cooling air for cooling the melted portion is introduced. Use , fix the welding rod support tube to the hot air introduction support tube that introduces hot air obtained by heating the air supplied from the air supply unit of the laser processing machine , blow hot air from the hot air introduction support tube to the resin, The molten portion where the resin and the welding rod are melted by hot air is pressed with a roller and cooled by supplying cooling air from a cooling air introduction tube while moving the roller, thereby welding the resin.
[0022]
According to the resin welding jig and the resin welding method using the same, which are mounted on the laser processing machine according to the present invention, resin cutting and welding are automated under the control of the laser processing machine, and lossless resin processing is performed. Is realized.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a resin welding jig mounted on a laser beam machine according to the present invention and a resin welding method using the same will be described in detail below with reference to the drawings.
[0024]
As shown in FIG. 1A, the resin welding jig to be mounted on the laser processing machine according to the present invention is mounted on a laser processing machine for welding the resin 8 using a laser processing machine (not shown). A welding rod support tube 2 that is fixed to a laser machining head nozzle 9 of a laser beam machine and into which a welding rod 5 is inserted, and a molten portion H in which the resin 8 and the welding rod 5 are melted. A roller 4 for pressure bonding and welding, a cooling air introduction tube 1 into which cooling air for cooling the melted portion H is introduced, and cutting teeth 62 for cutting the welding rod 5 behind the roller 4 in the traveling direction are provided. ing. The diameter of the roller 4 is appropriately selected depending on the shape of the resin to be processed and the thickness of the selected welding rod 5. The cooling air introduction tube 1 is connected to a known forced cooling air supply unit provided in the laser processing machine by a tube (not shown).
[0025]
As shown in FIG. 6B, the roller 4 is formed in a U shape with a gentle cross section so that the welding rod 5 can be pushed in half without being released, and is supported by the jig body 6 with screws 61 or the like. The
[0026]
The resin welding jig 10 and the laser processing head nozzle 9 can be fixed with a band as the fixture 7 'as shown in FIG. 1 (a). However, as shown in FIG. A pipe for connecting and fixing the welding rod support tube 2 and the laser processing head nozzle 9 to each other, and a welding rod support tube insertion fixing portion 72 through which the laser processing head nozzle 9 is inserted and fixed. -It is more suitable to use the nozzle connecting fixture 7.
[0027]
The welding rod support tube 2 and the laser processing head nozzle 9 are fixed by the tube / nozzle connection fixture 7 because the welding rod support tube insertion fixing portion 72 and the nozzle insertion fixing portion 79 are connected or integrated. The laser processing head nozzle 9 is inserted into the tube / nozzle coupling fixture 7 and is applied by button-type attachment, screwing, or the like.
[0028]
As shown in FIG. 2, the resin welding jig mounted on the laser beam machine according to the present invention includes a welding rod support tube 2 that is fixed to the laser machining head nozzle 9 of the laser beam machine and into which the welding rod 5 is inserted, and a resin. 8, a roller 4 for pressure-bonding and welding the melted part H in which the welding rod 5 has melted, a cooling air introduction pipe 1 into which cooling air for cooling the melted part H is introduced, and an air supply part of the laser processing machine The hot-air introduction pipe 3 for introducing the hot air obtained by heating the air supplied from is provided. This hot air introduction pipe 3 is connected to a known forced cooling air supply section provided in the laser processing machine by a pipe (not shown), and a known heater is inserted between the air supply section and the hot air introduction pipe 3. Air is hot air.
[0029]
The resin welding jig 10 attached to the laser processing machine of the present invention is preferably composed of aluminum or ceramic with high heat dissipation.
[0030]
The resin welding method using the resin welding jig mounted on the laser processing machine according to the present invention uses a laser beam by lowering the output of the YAG laser cutting machine. As shown in FIG. The welding rod support tube 2 of the resin welding jig 10 to be mounted is fixed to the laser processing head nozzle 9, and the laser beam is irradiated from the tip of the laser processing head nozzle 9 to the resin 8 such as polypropylene resin or polyethylene resin. Thus, the roller 4 is moved while the molten portion H in which the resin 8 and the welding rod 5 are melted is pressed by the roller 4. At the same time, cooling air is supplied from the cooling air introduction tube 1 to cool the melted portion H that has been pressure-bonded, and the resin 81 and the resin 82 are welded. In the laser beam irradiation, the laser beam is irradiated so as to be 10 mm to 50 mm away from the resin 8 and to have a width of 5 mm to 10 mm without concentrating the laser beam on one point. The distance between the resin 8 and the tip of the nozzle 9 is appropriately selected depending on the thickness of the resin 8 and the shape of the welding rod 5.
[0031]
Further, the resin welding method using the resin welding jig attached to the laser processing machine according to the present invention supports the welding rod of the resin welding jig 10 attached to the laser processing machine as shown in FIG. The tube 2 is fixed to the laser processing head nozzle 9, hot air obtained by heating the air supplied from the air supply unit provided in the laser processing machine with a heater is introduced into the hot air introduction tube 3, and the hot air is introduced into the resin 8. The roller 4 is moved while the molten portion H in which the resin 8 and the welding rod 5 are melted by the hot air is pressed by the roller 4, the cooling air is supplied from the cooling air introduction pipe 1, and the resin 8 is cooled. It is what is welded. The hot air when welding polypropylene resin, polyethylene resin or the like is obtained by heating a heater to 180 ° C to 250 ° C.
[0032]
As shown in FIG. 2 (b), the welding rod support tube 2 of the resin welding jig 10 to be mounted on the laser processing machine is heated by an air heater supplied from an air supply unit provided in the laser processing machine. Fixed to the hot air introduction tube end 31 for introducing the hot air obtained by heating, the hot air supplied to the hot air introduction support tube 31 is blown to the resin 8, and the molten portion where the resin 8 and the welding rod 5 are melted by the hot air While pressing H with the roller 4, the roller 4 is moved, cooling air is supplied from the cooling air introduction tube 1 and cooled, and the resin 8 is welded.
[0033]
Energy saving is achieved according to the method of heating the resin using hot air in which the cooling air is heated to 180 ° C. to 250 ° C. with a 100 V heat source heater without branching the laser. Can be removed.
[0034]
The melted portion H of the resin 8 and the resin welding rod 5 is obtained by first melting the surface of the resin 8 by laser beam irradiation or blowing hot air, and using the reflected heat to melt the welding rod 5. The roller 4 is moved while applying a pressure of 0.3 kg to 0.5 kg using the roller 4 to the melting part H by a preset operation of the processing machine. Forced cooling air is supplied from the cooling air introduction tube 1 to cool it, the melted portion H is crimped in a short time, the robot arm of the laser processing machine is stopped, lowered to 3 to 5 mm vertically, and welded by the cutting teeth 62 The rod 5 is cut, and the robot arm is raised vertically by 3 mm to 5 mm to complete the operation. The working speed is increased to around 1.5 m / min.
[0035]
The reason why laser cutting machines are not used for cutting of polypropylene resin, polyethylene resin, ABS resin, etc. is that the generation of toxic gas due to the heat of the laser was considered. After cutting the resin, ask the Environmental Management Center to collect and analyze the gas, and the results show that the gas is harmless (Tables 1 to 15). By performing resin welding, cutting and welding of polypropylene resin, polyethylene resin, etc., which relied on a very small number of special technicians, is automated.
[0036]
According to the present invention, the cutting and welding of the resin is automated. Accordingly, the total length of the conventional crimping line can be reduced to about 1/2, and the number of workers, the cost of the crimping line and the running cost can be reduced. Reductions can also be made.
[0037]
[Table 1]
Figure 0003881246
[0038]
[Table 2]
Figure 0003881246
[0039]
[Table 3]
Figure 0003881246
[0040]
[Table 4]
Figure 0003881246
[0041]
[Table 5]
Figure 0003881246
[0042]
[Table 6]
Figure 0003881246
[0043]
[Table 7]
Figure 0003881246
[0044]
[Table 8]
Figure 0003881246
[0045]
[Table 9]
Figure 0003881246
[0046]
[Table 10]
Figure 0003881246
[0047]
[Table 11]
Figure 0003881246
[0048]
[Table 12]
Figure 0003881246
[0049]
[Table 13]
Figure 0003881246
[0050]
[Table 14]
Figure 0003881246
[0051]
[Table 15]
Figure 0003881246
[0052]
【The invention's effect】
As is apparent from the above description, according to the resin welding jig using the resin welding jig attached to the laser processing machine according to the present invention, the resin cutting and welding are automated under the control of the laser processing machine. In addition, it is possible to join complicated shaped objects, and further reduce phenomena such as poor adhesion, pinholes, cracks, etc., thereby reducing the processing line, reducing the number of workers, reducing the equipment cost and running cost.
[Brief description of the drawings]
1A and 1B are views showing a resin welding jig mounted on a laser beam machine according to the present invention, where FIG. 1A is an overall view, FIG. 1B is an enlarged view of a roller, and FIG. 1C is attached to a resin welding jig. It is a figure which shows a pipe | tube / nozzle connection fixture.
FIGS. 2A and 2B are views showing another embodiment of a resin welding jig attached to the laser beam machine according to the present invention.
FIG. 3 is a view showing a resin welding method using a resin welding jig attached to a laser beam machine according to the present invention.
FIG. 4 is a view showing a jig used in conventional resin welding.
FIG. 5 is a view showing resin welding by a conventional jig.
FIG. 6 is a view showing a resin welding method using a conventional jig.
[Explanation of symbols]
1. . . 1. Air introduction pipe for cooling . . 2. Welding rod support tube . . Hot air introduction pipe 31. . . 3. Hot air introduction support tube . . Roller 5. . . Welding rod 7. . . Pipe / nozzle coupling fixture 72. . . Welding rod support tube insertion fixing part 79. . . 7. Nozzle insertion fixing part . . Resin 9. . . Laser processing head nozzle 10. . . Resin welding jig . . Melting zone

Claims (6)

レーザ加工機を用いて樹脂（８）を溶着するためのレーザ加工機に装着される樹脂溶着治具（１０）であって、
レーザ加工機のレーザ加工ヘッドノズル（９）に固定され溶接棒（５）が挿入される溶接棒支持管（２）と、前記樹脂および前記溶接棒が溶けあった溶融部（Ｈ）を圧着して溶着するローラ（４）と、前記溶融部を冷却する冷却用エアが導入される冷却用エア導入管（１）とを備えたことを特徴とするレーザ加工機に装着される樹脂溶着治具。A resin welding jig (10) attached to a laser processing machine for welding a resin (8) using a laser processing machine,
The welding rod support tube (2), which is fixed to the laser machining head nozzle (9) of the laser beam machine and into which the welding rod (5) is inserted, is bonded to the molten portion (H) where the resin and the welding rod are melted. And a roller for welding (4) and a cooling air introduction pipe (1) into which cooling air for cooling the melting portion is introduced. . 前記レーザ加工機のエア供給部から供給されるエアを加熱して得られる熱風を導入するための熱風導入管（３）を備えたことを特徴とする請求項１記載のレーザ加工機に装着される樹脂溶着治具。  The laser processing machine according to claim 1, further comprising a hot air introduction pipe (3) for introducing hot air obtained by heating air supplied from an air supply unit of the laser processing machine. Resin welding jig. 前記溶接棒支持管は、この溶接棒支持管が挿通固定される溶接棒支持管挿通固定部（７２）と前記レーザ加工ヘッドノズルが挿通固定されるノズル挿通固定部（７９）とを備え前記溶接棒支持管と前記レーザ加工ヘッドノズルとを連結固定する管・ノズル連結固定具（７）を備えたことを特徴とする請求項１または２記載のレーザ加工機に装着される樹脂溶着治具。  The welding rod support tube includes a welding rod support tube insertion fixing portion (72) through which the welding rod support tube is inserted and fixed, and a nozzle insertion fixing portion (79) through which the laser processing head nozzle is inserted and fixed. The resin welding jig mounted on a laser beam machine according to claim 1 or 2, further comprising a tube / nozzle coupling fixture (7) for coupling and fixing the rod support tube and the laser machining head nozzle. レーザ加工機を用いて樹脂（８）を溶着するための樹脂溶着方法において、
前記レーザ加工機のレーザ加工ヘッドノズル（９）に固定され溶接棒（５）が挿入される溶接棒支持管（２）と、前記樹脂および前記溶接棒が溶けあった溶融部（Ｈ）を圧着して溶着するローラ（４）と、前記溶融部を冷却する冷却用エアが導入される冷却用エア導入管（１）とを備えたレーザ加工機に装着される樹脂溶着治具を用い、
前記溶接棒支持管を前記レーザ加工ヘッドノズルに固定し、前記レーザ加工ヘッドノズルから前記樹脂にレーザ光線を照射し、前記レーザ光線により前記樹脂および前記溶接棒が溶けあった前記溶融部を前記ローラで押圧し前記ローラを移動しながら前記冷却用エア導入管から冷却用エアを供給して冷却し、前記樹脂を溶着することを特徴とする樹脂溶着方法。 In the resin welding method for welding the resin (8) using a laser processing machine,
A welding rod support tube (2), which is fixed to a laser machining head nozzle (9) of the laser beam machine and into which a welding rod (5) is inserted, and a molten portion (H) in which the resin and the welding rod are melted are crimped. And using a resin welding jig attached to a laser processing machine including a roller (4) for welding and a cooling air introduction pipe (1) into which cooling air for cooling the melting portion is introduced ,
The welding rod support tube is fixed to the laser processing head nozzle, the resin is irradiated with a laser beam from the laser processing head nozzle, and the molten portion where the resin and the welding rod are melted by the laser beam is used as the roller. A resin welding method, wherein the resin is welded by supplying cooling air from the cooling air introduction tube while cooling the roller while moving the roller while pressing the resin. レーザ加工機を用いて樹脂（８）を溶着するための樹脂溶着方法において、
前記レーザ加工機のレーザ加工ヘッドノズル（９）に固定され溶接棒（５）が挿入される溶接棒支持管（２）と、前記樹脂および前記溶接棒が溶けあった溶融部（Ｈ）を圧着して溶着するローラ（４）と、前記溶融部を冷却する冷却用エアが導入される冷却用エア導入管（１）とを備えたレーザ加工機に装着される樹脂溶着治具を用い、
前記溶接棒支持管を前記レーザ加工ヘッドノズルに固定し、前記レーザ加工機のエア供給部から供給されるエアを加熱して得られる熱風を熱風導入管（３）に導入し、前記熱風を前記樹脂に吹きつけ前記熱風により前記樹脂および前記溶接棒が溶けあった前記溶融部を前記ローラで押圧し前記ローラを移動しながら前記冷却用エア導入管から冷却用エアを供給して冷却し、前記樹脂を溶着することを特徴とする樹脂溶着方法。 In the resin welding method for welding the resin (8) using a laser processing machine,
A welding rod support tube (2), which is fixed to a laser machining head nozzle (9) of the laser beam machine and into which a welding rod (5) is inserted, and a molten portion (H) in which the resin and the welding rod are melted are crimped. And using a resin welding jig attached to a laser processing machine including a roller (4) for welding and a cooling air introduction pipe (1) into which cooling air for cooling the melting portion is introduced ,
The welding rod support tube is fixed to the laser processing head nozzle, hot air obtained by heating air supplied from an air supply unit of the laser processing machine is introduced into the hot air introduction tube (3), and the hot air is The cooling part is blown against the resin by the hot air to melt the resin and the welding rod, the cooling part is pressed by the roller and the cooling air is supplied from the cooling air introduction pipe while moving the roller, and the cooling is performed. A resin welding method characterized by welding a resin. レーザ加工機を用いて樹脂（８）を溶着するための樹脂溶着方法において、
前記レーザ加工機のレーザ加工ヘッドノズル（９）に固定され溶接棒（５）が挿入される溶接棒支持管（２）と、前記樹脂および前記溶接棒が溶けあった溶融部（Ｈ）を圧着して溶着するローラ（４）と、前記溶融部を冷却する冷却用エアが導入される冷却用エア導入管（１）とを備えたレーザ加工機に装着される樹脂溶着治具を用い、
前記溶接棒支持管を、前記レーザ加工機のエア供給部から供給されるエアを加熱して得 られる熱風を導入する熱風導入支持管（３１）に固定し、前記熱風導入支持管から前記熱風を前記樹脂に吹きつけ、前記熱風により前記樹脂および前記溶接棒が溶けあった前記溶融部を前記ローラで押圧し前記ローラを移動しながら前記冷却用エア導入管から冷却用エアを供給して冷却し、前記樹脂を溶着することを特徴とする樹脂溶着方法。 In the resin welding method for welding the resin (8) using a laser processing machine,
A welding rod support tube (2), which is fixed to a laser machining head nozzle (9) of the laser beam machine and into which a welding rod (5) is inserted, and a molten portion (H) in which the resin and the welding rod are melted are crimped. And using a resin welding jig attached to a laser processing machine including a roller (4) for welding and a cooling air introduction pipe (1) into which cooling air for cooling the melting portion is introduced ,
The welding rod support tube is fixed to a hot air introduction support tube (31) for introducing hot air obtained by heating air supplied from an air supply unit of the laser processing machine, and the hot air is supplied from the hot air introduction support tube. The resin is blown against the resin, and the molten portion in which the resin and the welding rod are melted by the hot air is pressed by the roller and cooled by supplying cooling air from the cooling air introduction pipe while moving the roller. A resin welding method characterized by welding the resin.
JP2002004787A 2002-01-11 2002-01-11 Resin welding jig mounted on laser processing machine and resin welding method using the same Expired - Fee Related JP3881246B2 (en)

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