JP3748430B2 - 超音波振動加熱の可視化方法 - Google Patents

超音波振動加熱の可視化方法 Download PDF

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JP3748430B2
JP3748430B2 JP2002341902A JP2002341902A JP3748430B2 JP 3748430 B2 JP3748430 B2 JP 3748430B2 JP 2002341902 A JP2002341902 A JP 2002341902A JP 2002341902 A JP2002341902 A JP 2002341902A JP 3748430 B2 JP3748430 B2 JP 3748430B2
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ultrasonic vibration
ultrasonic
joined
light
vibration heating
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JP2004174794A (ja
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譲 堀江
智博 出口
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Shimane Prefecture
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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
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1282—Stepped joint cross-sections comprising at least one overlap joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1284—Stepped joint cross-sections comprising at least one butt joint-segment
    • B29C66/12841—Stepped joint cross-sections comprising at least one butt joint-segment comprising at least two butt joint-segments
    • 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
    • B29C66/14—Particular design of joint configurations particular design of the joint cross-sections the joint having the same thickness as the thickness 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/733—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 optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence
    • B29C66/7336—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 optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence at least one of the parts to be joined being opaque, transparent or translucent to visible light
    • B29C66/73361—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 optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence at least one of the parts to be joined being opaque, transparent or translucent to visible light at least one of the parts to be joined being opaque to visible light
    • B29C66/73362—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 optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence at least one of the parts to be joined being opaque, transparent or translucent to visible light at least one of the parts to be joined being opaque to visible light both parts to be joined being opaque 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
    • B29C66/70—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
    • B29C66/733—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 optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence
    • B29C66/7336—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 optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence at least one of the parts to be joined being opaque, transparent or translucent to visible light
    • B29C66/73365—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 optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence at least one of the parts to be joined being opaque, transparent or translucent to visible light at least one of the parts to be joined being transparent or translucent to visible light
    • B29C66/73366—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 optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence at least one of the parts to be joined being opaque, transparent or translucent to visible light at least one of the parts to be joined being transparent or translucent to visible light both parts to be joined being transparent or translucent 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
    • B29C66/81—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
    • B29C66/81415—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 bevelled
    • 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
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9131—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the heat or the thermal flux, i.e. the heat flux
    • 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
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B29C66/9192—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams
    • 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
    • B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
    • B29C66/959—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 characterised by specific values or ranges of said specific variables
    • B29C66/9592—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 characterised by specific values or ranges of said specific variables in explicit relation to another variable, e.g. X-Y diagrams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis

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  • Mechanical Engineering (AREA)
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  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Description

【０００１】
【発明の属する技術分野】
この発明はプラスチック材やアルミニウム等の超音波溶接等のように超音波による加熱を伴う技術における超音波振動加熱の可視化方法に関する。
【０００２】
【従来の技術及び発明が解決しようとする課題】
【特許文献１】
特開平５−１６２４２号
【非特許文献１】
「ニューセラミックス」vol.9，No.10（1996）PP27-33，「希土類アルミネート系蓄光型蛍光体の出現とその光物性」
従来例えばアルミニウムの超音波溶接や特許文献１に示されるプラスチックの超音波溶接等に代表される超音波を用いて部材を加熱溶接加工する技術が古くから知られており、この他超音波振動の摩擦熱を利用した個体や液体の予熱，保温等の加熱技術が知られている。これらの超音波利用の加熱のうち、特に加熱部が部材の内部である場合は、超音波を付与した効果の確認又は監視が困難であるという問題があった。
【０００３】
これに対し、従来超音波振動加熱部を可視化する方法として赤外線画像による方法が知られているが、この方法は測定が煩雑で、しかも表面反射による測定精度の信頼性の問題や、設備費が高価である等の問題があり、実用的ではないという欠点がある。
【０００４】
一方、非特許文献１に示すように、アルミン酸ストロンチウム（ＳｒＡｌ2Ｏ4）等の長残光性蛍光体が熱ルミネッセンス性を備えていることが知られているが、これが超音波振動加熱の分野で応用される例は発明者等の調査によっても見当たらない。
【０００５】
本発明者等は、長残光性蛍光体溶射皮膜の研究の中で、知見を得たプラズマ溶射によるＳｒＡｌ2Ｏ4系長残光性蛍光体皮膜の熱ルミネッセンス性を応用し、本発明に関わる超音波を利用した新規溶着技術の開発研究に於いて、プラスチックウエルダー工具ホーンの超音波振動を可視化することができたので、これを超音波振動加熱の可視化に広く応用せんとするものである。
【０００６】
【課題を解決するための手段】
上記課題を解決するための本発明の方法は、第１に所定の部材４ａ，４ｂに超音波ホーン７により、超音波振動を与えて発熱させる超音波振動加熱において、熱ルミネッサンス性を備えた面状の発光体３を上記部材の発熱部６に近接又は接触させて発光させることにより、超音波振動の付与効果をモニターすることを特徴とするものである。
【０００７】
第２に、所定の部材が互いに接合される２以上の被接合材４ａ，４ｂであり、発熱部が互いに重なり合って溶接により接合される被接合材４ａ，４ｂの接合面６ａ，６ｂからなる接合部６であり、モニターが接合部６の接合状態のモニターであることを特徴とするものである。
【０００８】
第３に、被接合材が共にプラスチック材４ａ，４ｂであることを特徴とするものである。
【０００９】
第４に、プラスチック材４ａ，４ｂが透明又は不透明の部材であることを特徴とするものである。
【００１０】
第５に、発光体が基材２表面に蛍光体粉末を溶射して形成された残光性の溶射皮膜３であることを特徴とするものである。
【００１１】
第６に、残光性の溶射皮膜３がＳｒＡｌ2Ｏ4を溶射して形成したものであることを特徴とするものである。
【００１２】
第７に、プラスチック材４ａ，４ｂの接合面６ａ，６ｂを重ね合わせた状態で作業台１上に形成された発光体３の上面にプラスチック材４ａ，４ｂを取付固定し、上記接合面６ａ，６ｂ上より超音波ホーン７により超音波を与えて接合面６ａ，６ｂを溶接することを特徴とするものである。
【００１３】
第８に、超音波ホーン７の先端に透光性部材よりなるチップ７ｂを取り付け、超音波ホーン７と該チップ７ｂの間にチップ７ｂを介して受光した発光体３の光を超音波ホーン７の側方に反射させてモニターすることを特徴とするものである。
【００１４】
第９に、面状の発光体３の表面側に発熱部６を配置し、発光体３の裏側より発光体３の光を採光してモニターすることを特徴とするものである。
【００１５】
【発明の実施の形態】
以下図示するこの発明の実施形態につき説明すると、図１は本発明の方法をプラスチック（アクリル板）の超音波溶接に応用する場合の実施状態を示す正面図で、作業台１は鉄，鋳鉄，セラミック材等からなる基材２の平坦な加工表面に、アルミン酸ストロンチウム（ＳｒＡｌ2Ｏ4）系長残光性蛍光体等からなる熱ルミネッセンス性を備えた蛍光体材料をプラズマ溶射して得た発光体皮膜（発光体）３を形成している。
【００１６】
上記溶射皮膜は例えば特公平２−４６６６４号公報に示されるプラズマ溶射方法等によって行われ、膜厚は概ね１５０〜２００μｍ程度である。このように形成された発光皮膜３は、図２に示すようなグローカーブを示し、同図のものは３６５ｍｍ紫外線励起による熱ルミネッセンス性を示すもので、この発光皮膜３のピーク温度は７２℃である。
【００１７】
作業台１の発光皮膜３の表面上には、被接合材である２枚のアクリル板４（４ａ，４ｂ）の端部の接合部（面）６を重ね合わせた状態で載置され、共に押圧固定されている。各アクリル板４は例えば１００×３０×４ｍｍの寸法のものが使用されている。接合部６は互いに適合して接触し合うように逆向きの段部からなる接合面６ａ，６ｂによって形成されている。
【００１８】
上記接合部６上にはアクリル板４の前後幅と接合部６の左右幅を覆う端面幅を有する超音波ホーン７の端面が押接され、その端面より接合面６ａ，６ｂに対して直交する方向の超音波振動が印加される。この実施に用いたプラスチックウエルダーは静電舎電子工業株式会社製「ＳＯＮＯＰＥＴ Σ−１２００」が用いられ、超音波印加条件は次の通りである。
加圧力 ：０．１８ＭＰａ
発振時間：１．５ｓ
保持時間：３．０ｓ
周波数 ：１９．１５ｋＨｚ
振幅 ：１０μｍ
【００１９】
図示する例ではホーン７の先端は金属部７ａの先端に透光セラミックスからななる透光チップ７ｂが接着又はビス止めその他の方法により一体的に固着されており、両者の取付面８は左右いずれかに例えば４５°の傾斜角をもって傾斜している。この取付面の少なくとも金属部７ａ側の面は反射面を構成し、透光チップ７ｂの先端側より入射する光を傾斜下面側よりホーン７の側方に反射する構造になっている。
【００２０】
また上記反射面８より反射した光の光線上には、その反射光を受けて光の強さや種類等を検出するフォトセンサー等の検出部（図示しない）が配置されており、検出部は、その検出信号を受けて分析する分析部（図示しない）等に接続される。
【００２１】
上記のように構成される装置において、ホーン７により接合面６ａ，６ｂに直交する方向に超音波振動が印加されると、接合面６ａ，６ｂ同士が摩擦熱により発熱し、被接合部材４ａ，４ｂがその接合面６ａ，６ｂにおいて溶着される。
【００２２】
この時接合部６に発生した熱は下部の発光皮膜３に伝わり、発光皮膜３を発光させ、その光は透光チップ７ｂを介して反射面（取付面）８より検出部に送られ、分析部において分析される。その結果その分析値により、接合部の発熱状態、即ち被接合部材４ａ，４ｂの接合温度その他の条件が数量的にモニターすることが可能となる。
【００２３】
図３は被接合材４が不透明材である場合の溶接方法を示しており、この場合被接合材４を介して発光皮膜３の発光状態をモニターできないために、ホーン７の先端に図１の場合のように透明（光）部材製のチップ７ｂを設ける必要がなく、或いはチップ７ｂを設ける意味がない。このためホーン７の先端は全体が金属製となっている。
【００２４】
またこのケースでは発光皮膜３の発光のモニターがホーン７側からは不可能なために、作業台１側の基材２′をガラス，透明セラミックス板等のように透光性を備えた板材を用い、発光被膜３の発光状態を基材２′の裏面側からモニターする構造になっている。
【００２５】
即ち基材２′の裏面側には、反射面８を備えた鏡等からなる反射部材９が約４５°の傾斜角をもって上向きに設置され、基材２′を介して反射面８からの反射光をモニターする構造になっており、図３においてその他の構造及び可視化の原理は、図１の実施形態と同一であり、同一作用部は同一名称で、同一の符号で示されている。この方法によればアルミニウム材の超音波溶接等でもモニターが可能である。
【００２６】
その他上記実施形態では発光体として熱ルミネッセンス性を備えた（ＳｒＡｌ2Ｏ4系長残光性蛍光体（皮膜）を用いたが、これと同様の性質を備えていれば必ずしも上記材料に限られるものではなく、例えばＺｎＳ蛍光体等の使用が可能である。
【００２７】
【発明の効果】
以上のように構成される本発明の方法によれば、プラスチックの超音波溶接における接合部等のような、超音波振動加熱部の加熱状態が発光現象として可視（モニター）できるので、目視により或いはモニター装置により超音波印加における作業条件の最適化の実現ができ、基材の熱影響部の広がりや熱劣化が把握できるほか、品質管理等にも役立つ等の利点がある。
また従来の赤外線を利用したモニターに比し、測定が簡単で測定精度も高く、設備コストも低廉である等の利点がある。
【図面の簡単な説明】
【図１】本発明の方法の実施形態を示す装置の要部断面図である。
【図２】熱ルミネッセンス性を備えた発光皮膜のグローカーブを示すグラフである。
【図３】この発明の他の実施形態を示す装置の要部断面図である。
【符号の説明】
１ 作業台
２ 基材
３ 発光体（溶射皮膜）
４，４ａ，４ｂ 部材（被接合材プラスチック材，プラスチック板）
６ 接合部
６ａ，６ｂ 接合面
７ ホーン
７ａ 金属部
７ｂ 透光チップ
８ 取付面（反射面）

Claims (9)

  1. 所定の部材（４ａ），（４ｂ）に超音波ホーン（７）により超音波振動を与えて発熱させる超音波振動加熱において、熱ルミネッセンス性を備えた面状の発光体（３）を上記部材の発熱部（６）に近接又は接触させて発光させることにより、超音波振動の付与効果をモニターする超音波振動加熱の可視化方法。
  2. 所定の部材が互いに接合される２以上の被接合材（４ａ），（４ｂ）であり、発熱部が互いに重なり合って溶接により接合される被接合材（４ａ），（４ｂ）の接合面（６ａ），（６ｂ）からなる接合部（６）であり、モニターが接合部（６）の接合状態のモニターである請求項１の超音波振動加熱の可視化方法。
  3. 被接合材が共にプラスチック材（４ａ），（４ｂ）である請求項２の超音波振動加熱の可視化方法。
  4. プラスチック材（４ａ），（４ｂ）が透明又は不透明の部材である請求項３の超音波振動加熱の可視化方法。
  5. 発光体が基材（２）表面に蛍光体粉末を溶射して形成された残光性の溶射皮膜（３）である請求項１，２，３又は４の超音波振動加熱の可視化方法。
  6. 残光性の溶射皮膜（３）がＳｒＡｌ2Ｏ4を溶射して形成したものである請求項５の超音波振動加熱の可視化方法。
  7. プラスチック材（４ａ），（４ｂ）の接合面（６ａ），（６ｂ）を重ね合わせた状態で作業台（１）上に形成された発光体（３）の上面にプラスチック材（４ａ），（４ｂ）を取付固定し、上記接合面（６ａ），（６ｂ）上より超音波ホーン（７）により超音波を与えて接合面（６ａ），（６ｂ）を溶接する請求項５又は６の超音波振動加熱の可視化方法。
  8. 超音波ホーン（７）の先端に透光性部材よりなるチップ（７ｂ）を取り付け、超音波ホーン（７）と該チップ（７ｂ）の間にチップ（７ｂ）を介して受光した発光体（３）の光を超音波ホーン（７）の側方に反射させてモニターする請求項１，２，３，４，５，６又は７の超音波振動加熱の可視化方法。
  9. 面状の発光体（３）の表面側に発熱部（６）を配置し、発光体（３）の裏側より発光体（３）の光を採光してモニターする請求項１，２，３，４，５，６又は７の超音波振動加熱の可視化方法。
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