JP3727454B2

JP3727454B2 - Method for manufacturing amorphous iron core transformer

Info

Publication number: JP3727454B2
Application number: JP31634297A
Authority: JP
Inventors: 真澄白石; 栄太丸山; 聡山田
Original assignee: Aichi Electric Co Ltd
Current assignee: Aichi Electric Co Ltd
Priority date: 1997-10-30
Filing date: 1997-10-30
Publication date: 2005-12-14
Anticipated expiration: 2017-10-30
Also published as: JPH11135349A

Description

【０００１】
【産業上の利用分野】
本発明は、非晶質磁性合金薄帯からなる１ターンカット方式の巻鉄心を使用したアモルファス鉄心変圧器とその製造方法に関するもので、その目的とするところは、巻鉄心の脚鉄部の剛性強化を図ったアモルファス鉄心変圧器とその製造方法を提供することにある。
【０００２】
【従来の技術】
近年、例えば、配電用変圧器には、その鉄心材料として非晶質磁性合金薄帯（以下、アモルファス鉄心という）を使用した変圧器鉄心が種々開発され実用化されている。前記変圧器鉄心として用いるアモルファス鉄心は磁性合金の溶融体を超急冷して製造するもので、鉄損が非常に小さく優れた磁気特性を備えており、このアモルファス鉄心を用いて巻鉄心を製造する場合は、例えば、一対の継鉄部のうち、一方の継鉄部にバットジョイントやラップジョイント等の接合部を備えた所謂、１ターンカット方式の巻鉄心が今日多く製造されている。
【０００３】
前記１ターンカット方式の巻鉄心は、例えば、帯状のアモルファス鉄心を、１ターン毎にあらかじめ設定した長さ寸法で切断した単位鉄心を複数枚（２０〜３０枚）にまとめて単位鉄心素体を設け、この単位鉄心素体を更に複数層に積層して単位鉄心ブロック（以下、単に積層ブロックという。）を形成し、巻鉄心の組立に際しては、前記積層ブロックを円形に巻回して単位鉄心素体の両端を順次階段状にずらしながら突合せ又は重ね合わせて接合し、この積層ブロックを、更に、必要層数前記同様に順次巻回積層して所定の積層厚となした１ターンカット方式の円形に巻回した巻鉄心を構成していた。
【０００４】
前記のようにして積層した１ターンカット方式の巻鉄心は、その突合せ等の接合部を継鉄部の一辺に位置させて矩形状に成形した後磁場焼鈍を行い、前記焼鈍後は、巻鉄心の各積層ブロック毎に前記継鉄部の接合部を開放し、前記接合部を開放したＵ字状の積層ブロックを順次巻線の鉄心挿入孔に挿入し、つづいて、前記巻線に挿入した積層ブロックの各接合部を積層ブロック毎に順次再接合することにより、その磁気回路と導電回路の鎖交結合を終えて巻鉄心の組立を行っていた。
【０００５】
【発明が解決しようとする課題】
ところが、前記のようにして１ターンカット方式の巻鉄心を製造する場合、次のような問題があった。
（１）アモルファス鉄心は剛性に乏しく、しかも、焼鈍により相当脆弱化しているので、積層ブロックを順次巻線に挿入して鉄心組立を行う場合、前記積層ブロックが巻線への挿入時に巻線や他の積層ブロックと衝突したりすると、簡単にアモルファス鉄心の角部や積層端面が欠損したり剥落してアモルファス鉄心の金属破片が生じ、この破片が例えば、変圧器の運転中に絶縁油の対流で漂遊し、巻線の層間に侵入して巻線の絶縁を劣化させるという問題があった。
【０００６】
（２）又、アモルファス鉄心は剛性に乏しいため、積層ブロックを個々に分割して巻鉄心の組立を行う場合、各積層ブロックをそれぞれ矩形成形時の形状を崩して積層ブロック毎に、それぞれ継鉄部の接合部を利用してＵ字状に開放して鉄心組立を行っていたので、自重変形が生じやすくこれにより鉄心自体に内部歪等が生じてその磁気特性に悪影響を与えることがあった。この結果、巻鉄心の組立作業は細心の注意をはらって行う必要があり、この種巻鉄心の組立作業を円滑に、かつ、効率的に行えないという問題もあった。
【０００７】
（３）更に、アモルファス鉄心は非常に極薄に製造されており、しかも、焼鈍によって相当脆弱化しているので、各積層ブロックを順次巻線に組込んだ場合、自立性に極めて乏しく、腰砕けの状態になってしまうことが多い。このため、各積層ブロックは巻線に挿入した都度次の積層ブロックを挿入するまでの間、例えば、特殊な治具等を用いて自立させていたので、アモルファス鉄心を用いた巻鉄心の組立効率が非常に悪く、この種巻鉄心の生産性向上を阻む大きな要因となっていた。
【０００８】
本発明は、前記の問題点に鑑み、鉄心組立時アモルファス鉄心の剛性強化を図ることにより、巻鉄心の巻線への組立作業を、磁気特性を損うことなく迅速・円滑に行って、アモルファス鉄心からなる巻鉄心変圧器の生産性向上を可能とした、アモルファス鉄心変圧器とその製造方法を提供することにある。
【０００９】
【課題を解決するための手段】
本発明は、非晶質磁性合金薄帯を巻回し、かつ、少なくとも１ケ所を切断して突合せ等の接合部を備えた矩形状の巻鉄心と、前記巻鉄心の脚鉄部に嵌挿した巻線とを備えたアモルファス鉄心変圧器において、前記巻鉄心の脚鉄部の積層端面に接着剤を所定の間隔を保って複数箇所塗布して接着部を形成する工程と、前記接着部を形成した脚鉄部を上下一対の貼付部材にて被覆する工程と、前記一対の貼付部材の外側から金属鋼板をコ字形に折曲して形成した一対の整形枠体を、該整形枠体の一対の折曲片を脚鉄部の内，外周面に当接させ、かつ、前記整形枠体の橋絡部を脚鉄部の積層端面側に押動して該橋絡部の内側に貼着したクッション材を押圧した状態で挟着して、前記貼付部材を前記クッション材の弾性力により押圧して脚鉄部の積層端面に接着・保持させる工程と、前記貼付部材を介して脚鉄部に挟着した一対の整形枠体による前記貼付部材の挟持を解いた後巻鉄心をその接合部を有する継鉄部を開いてＵ字状に拡開する工程と、前記Ｕ字状に拡開した巻鉄心を巻線に挿入し、かつ、拡開した継鉄部を再接合する工程とを備えたことを特徴とする。
【００１２】
本発明は、巻鉄心の脚鉄部に、上下一対の貼付部材を取付けることにより、脚鉄部の剛性強化と焼鈍により脆弱化しているアモルファス鉄心が、巻鉄心組立時に生ずる衝撃力によって欠損するのを良好に抑制し、これによって、巻鉄心の巻線への組立作業を円滑・良好に行うことを可能とした。又、前記貼付部材は、上下一対に分割されているので、その取付作業が簡易に行えるとともに、止着手段は脚鉄側の一方と、貼付部材の一方とにそれぞれ適宜に塗布した接着剤により、貼付部材を脚鉄部にこれを挟むようにして貼着し、前記貼着した一対の貼付部材を、整形枠体によって脚鉄部にその積厚寸法を維持させながら一定時間挟持するようにしたので、巻鉄心はその脚鉄部を簡易な構造で剛性強化をはかることを可能とした。
【００１３】
【発明の実施の形態】
以下、本発明の実施例を図１ないし図１５によって説明する。図１において、１は非晶質磁性合金薄帯（以下、単にアモルファス鉄心という）をあらかじめ設定された所定長さ寸法に切断し、これを巻回して巻鉄心を形成するための切断・巻回装置を示し、前記切断・巻回装置１は、アモルファス鉄心２を巻回した複数（本実施例では５個）のドラム３と、前記各ドラム３から巻き戻されたアモルファス鉄心２を複数枚重ね合わせた状態で切断装置４まで給送する送りローラ５と、送りローラ５から給送されたアモルファス鉄心２を切断する前記切断装置４と、この切断装置４にて切断したアモルファス鉄心２を巻取軸６に巻取り用のベルト７を介して順次円形状に巻回する鉄心巻取機８とによって構成されている。
【００１４】
次に、前記切断・巻回装置１により１ターンカット方式の巻鉄心を巻回する場合について説明する。まず、複数のドラム３から巻き戻したアモルファス鉄心２をそれぞれ重ね合わせて積層し、これを送りローラ５によりあらかじめ設定した所定の長さ寸法で順次切断装置４の位置まで送って切断する。つづいて、前記所定の長さ寸法で切断された各鉄心素板９を例えば、整列台９ａ上で階段状に複数層積層して鉄心素板群１０を形成し、この鉄心素板群１０を鉄心巻取機８の巻取軸６に、巻取り用のベルト７を介して順次円形状に巻回して環状鉄心（図示せず）を巻回する。
【００１５】
そして、前記環状鉄心を巻回したらこれを巻取軸６から取外し、これを図示しない成形治具により矩形状に成形し、磁場焼鈍を行って、図２で示す矩形状に成形加工した巻鉄心１１を形成する。なお、図２において、１３は巻鉄心１１の内側に配置した内側補強枠を示し、１４は同じく巻鉄心１１の外側に配置した外側補強枠であり、それぞれけい素鋼帯によって形成されている。なお、図１に示す１２は切断装置４，送りローラ５，鉄心巻取機８等を駆動・停止自動制御するコントローラである。
【００１６】
矩形状に成形されて磁場焼鈍を行った巻鉄心１１は、図２で示すように、図示しない成形治具を取外しても、内，外側補強枠１３，１４の存在によって良好に矩形状態が維持されている。
【００１７】
次に前記巻鉄心１１の継鉄部ｈ，ｈ₁間に図３のように一対の成形金型１５，１５ａを挿入し、つづいて、成形金型１５，１５ａの凹溝ａ，ａ間に、板状の型板１５ｂを圧入して巻鉄心１１の矩形状態を維持させ、この状態で、巻鉄心１１の一対の脚鉄部ｂ，ｂにおける積層端面の一方（図３参照）に、例えば、常温硬化性のエポキシ樹脂等からなる接着剤を一定の間隔を保って塗布して図３で示すように、接着部１６を設け、この接着部１６を利用して比較的薄葉な絶縁紙を脚鉄部ｂ，ｂに貼着する。
【００１８】
即ち、前記巻鉄心１１は、図２で示すように、磁場焼鈍を終えたら図３に示すように、成形金型１５，１５ａと型板１５ｂとを用いて巻鉄心１１の矩形状態を維持する。この後、図示しない昇降手段（電動ホイスト，電動リフト等）により吊持し、巻鉄心１１を図４で示すように、一対の脚台１７，１７上に載架する。この後、成形金型１５，１５ａ，型板１５ｂを除去しても、巻鉄心１１は内，外両補強枠１３，１４によって、型崩れすることなく矩形状態を良好に維持している。
【００１９】
そして、巻鉄心１１を脚台１７，１７上に乗載したら、図４に示すように、積層端面の一方（図４の上部側）には、脚鉄部ｂ，ｂのみにおいて接着剤を、一定の間隔を保って塗布して複数の接着部１６を形成する。これら接着部１６には、例えば、ＪＩＳＣ２３１７に規定する電気用ポリエステルフィルム加工紙（ポリエチレンテレフタレートフィルムと、これに緩衝作用を及ぼすために貼り合わせた絶縁紙とからなり、以下単に絶縁加工紙という）を貼着して脚鉄部ｂ，ｂの上半分を被覆する。
【００２０】
即ち、前記絶縁加工紙は、図５に示すように、脚鉄部ｂ，ｂの積層端面側の幅寸法でコ字状に折曲して橋絡部ｃを設けるとともに、この橋絡部ｃと連接する折曲部ｄは、脚鉄部ｂ，ｂ周面の幅寸法の半分の長さ寸法で折曲することにより、コ字状の貼付部材１８，１８を形成する。そして、これら貼付部材１８，１８は、そのフィルム側を表面として絶縁紙（裏面）部分の橋絡部分を巻鉄心１１の積層端面側に設けた接着部１６に接着させることにより、脚鉄部ｂ，ｂの上側面（図５に示す上半部）を図６で示すように、貼付部材１８，１８により包み込むようにして被覆する。
【００２１】
つづいて、巻鉄心１１の脚鉄部ｂ，ｂの下半部を被覆する場合について説明する。この場合も前記同様コ字状に曲成した貼付部材を用いる点は同じだが、脚鉄部ｂ，ｂの下半部を被覆するコ字状の貼付部材１９，１９には図５で示すように、あらかじめ内面（裏面）となる絶縁紙部分の橋絡部ｃ₁に、常温硬化性のエポキシ樹脂等からなる接着剤を所定の間隔を保って塗布することにより、複数の接着剤部１９ａを形成する。
【００２２】
前記貼付部材１９，１９の貼付に当っては、図５に示すように、巻鉄心１１の脚鉄部ｂ，ｂの下側に位置する積層端面に、上側の貼付部材１８，１８と同様に橋絡部ｃ₁を当接して貼着することにより、脚鉄部ｂ，ｂの下側面（下半部）を貼付部材１９，１９で包み込むようにして被覆する。この結果、脚鉄部ｂ，ｂは図６に示すように、上下一対の貼付部材１８，１９の橋絡部ｃ，ｃ₁と折曲部ｄ，ｄ₁にて、積層端面及び内，外周面を完全に覆うことができる。
【００２３】
貼付部材１８，１９の貼着が終了したら、つづいて、脚鉄部ｂ，ｂの積厚寸法の維持（アモルファス鉄心はけい素鋼帯に比べて非常に薄く形成されているので、焼鈍後積層端面の融着がほぐれると、巻鉄心１１全体が膨らむ傾向にあるため、積層端面の積厚寸法を整定して一定に保持する必要がある）及び貼付部材１８，１９と巻鉄心１１との接着性を確実化するために、図７で示すように、脚鉄部ｂ，ｂに断面コ字形の整形枠体２０，２１を挟着することにより、巻鉄心１１の積厚寸法の均一化を維持させる。
【００２４】
前記積厚寸法の均一化を維持するための整形枠体２０，２１は、図８に示すように、例えば、金属鋼板を巻鉄心１１の積厚寸法に合せてコ字形に折曲し、前記折曲した一対の折曲片ｅ，ｅ₁の一方の折曲片ｅの端部を外側に湾曲（傾斜）して湾曲部ｅ₀を形成する。そして、整形枠体２０，２１を巻鉄心１１の脚鉄部ｂ，ｂに挟持させる場合は、整形枠体２０，２１の橋絡部ｆ内側に適宜な厚さのゴム，スポンジ等からなるクッション材２２をあらかじめ貼着しておく。
【００２５】
そして、脚鉄部ｂ，ｂに貼着した絶縁加工紙からなる貼付部材１８，１９の外側から、前記コ字形の整形枠体２０，２１を、それぞれ一対の折曲片ｅ，ｅ₁を脚鉄部ｂ，ｂの内，外周面に当接させ、この状態で、整形枠体２０，２１の橋絡部ｆを脚鉄部ｂ，ｂの積層端面側に押動すると、整形枠体２０，２１は、折曲片ｅ側に設けた湾曲部ｅ₀を利用して折曲片ｅ，ｅ₁を脚鉄部ｂ，ｂにより開拡された状態で、図７のように脚鉄部ｂ，ｂに挟着する。
【００２６】
このように、整形枠体２０，２１の取付けは、図７，９で示すように、巻鉄心１１の脚鉄部ｂ，ｂの積層端面の上，下方向から、一対の折曲片ｅ，ｅ₁の一方に形成した湾曲部ｅ₀を利用して挟め込むことにより、整形枠体２０，２１は自体の弾力性を有効利用し、かつ、貼付部材１８，１９表面のフィルム面を滑動して容易に脚鉄部ｂ，ｂに挟着することができる。
【００２７】
前記整形枠体２０，２１の挟着により、巻鉄心１１の脚鉄部ｂ，ｂに貼着した貼付部材１８，１９は、その橋絡部ｃ，ｃ₁がクッション材２２の弾性力に押圧されて脚鉄部ｂ，ｂの積層端面に、接着部１６，接着剤部１９ａを介して平坦状に接着される。又、整形枠体２０，２１は金属鋼板によって縦断面がコ字形に形成されているので、脚鉄部ｂ，ｂに挟持させた場合、弾性力が作用して脚鉄部ｂ，ｂに良好に挟持されるとともに、脚鉄部ｂ，ｂの積厚寸法を一定に保持することができる。
【００２８】
前記のようにして、巻鉄心１１の脚鉄部ｂ，ｂに貼付部材１８，１９と整形枠体２０，２１の取付けを終えたら、各貼付部材１８，１９の折曲部ｄ，ｄ₁（自由端）同士及び折曲部ｄ，ｄ₁（自由端）と脚鉄部ｂ，ｂとを、図１０に示すように、脚鉄部ｂ，ｂの内，外周面において，粘着テープ２３を用いて相互に接着（粘着テープ２３に代えて接着剤により折曲部ｄ，ｄ₁を脚鉄部ｂ，ｂに仮止めするようにしてもよい）する。この結果、巻鉄心１１の脚鉄部ｂ，ｂに、橋絡部ｃ，ｃ₁及び折曲部ｄ，ｄ₁を接着した状態で貼付部材１８，１９を取付けるようにしたので、脚鉄部ｂ，ｂは図１０のように、貼付部材１８，１９に被覆された状態で保持されることになる。この後、接着部１６，接着剤部１９ａが硬化した時点で、整形枠体２０，２１を脚鉄部ｂ，ｂから取外す。
【００２９】
従って、本発明において巻鉄心１１の脚鉄部ｂ，ｂは、図１０で示すように、絶縁加工紙からなる貼付部材１８，１９を取付けることにより、焼鈍によって脆くなっているアモルファス鉄心２が欠損したり、剥落するのを良好に防ぐことができるとともに、巻鉄心１１自体の形崩れを防ぎ、その剛性強化をはかって自立性を高めることができる。これは、貼付部材１８，１９にフィルムと絶縁紙とを組合せた比較的腰の強い絶縁部材を使用しているためであり、フィルムの使用をやめクラフト紙を複数枚重ねたものを使用するようにしてもよい。
【００３０】
巻鉄心１１に貼付部材１８，１９を取付けたら、前記巻鉄心１１を図示しない吊上手段等にて例えば、ローラコンベア２４上に滑動板２４ａを介して乗載する。巻鉄心１１の接合部ｇが位置する継鉄部ｈを外側補強枠１４の固定を解いて、前記接合部ｇを利用して外方に向けて開く。即ち、巻鉄心１１を矩形状態から図１１で示すように、平面形状がＵ字状となるように開拡する。なお、巻鉄心１１の前記開放作業に際して、前記脚鉄部ｂ，ｂは、それぞれ貼付部材１８，１９により剛性強化が十分維持されているので、前記接合部ｇを有する継鉄部ｈの開放時において、巻鉄心１１が自重変形したり、形崩れ等を起すということは全くなく、円滑・良好にＵ字状に開放することができる。
【００３１】
前記のようにして継鉄部ｈをその接合部ｇにおいて開放した後、前記継鉄部ｈの尖端から脚鉄部ｂ，ｂ部分に図１１で示すように、先端を先細状に折曲して形成した黄銅等からなる挿入保護帽２５を当接する。この挿入保護帽２５は、巻鉄心１１の開放した継鉄部ｈの先端が、巻線２７への挿入時に巻線２７の鉄心挿入孔２８（図１１参照）の入口等と衝接して欠損したり、内，外方向に傾倒して巻線２７への挿入作業を困難にするという問題の解決をはかっている。
【００３２】
一方、巻鉄心１１が挿入される前記巻線２７は、図１１で示すように、ローラコンベア２４の途中に設けた巻線固定装置２９に一対並行に乗載して固定する。この巻線固定装置２９は巻線２７，２７が巻鉄心１１を組込む際に揺動するのを防ぐようにしたもので、載置台３０上に乗載した一対の巻線２７を係止板３１（図では１枚のみ図示）により挟持固定するもので、この係止板３１は図１１で示すように、巻線２７，２７を挟持した状態で載置台３０上に乗載・固定される。又、前記載置台３０は図示しない昇降手段により、ローラコンベア２４のローラ部分３２の頂部を基準として一定の寸法で昇降するように構成されている。巻線２７を載置台３０に載せて固定したら、載置台３０を運転してローラ部分３２の頂部と巻線２７の鉄心挿入孔２８の下面とを同一高さとなるように調整する。
【００３３】
一対の巻線２７，２７を巻線固定装置２９に固定したら、つづいて、Ｕ字状に開放した巻鉄心１１は事前に図示しない吊上手段等にて、ローラコンベア２４上に滑動板２４ａを介して乗載されており、しかも、開放した継鉄部ｈ側は図１１に示すように、巻線２７側に位置させてある。巻線２７，２７への挿入に際しては、開放した継鉄部ｈの挿入保護帽２５の外側にガイドカバー３３を被せ、この状態で、滑動板２４ａによりローラコンベア２４上を滑動させて巻鉄心１１を巻線２７，２７側に移動させ、巻鉄心１１の脚鉄部ｂ，ｂを巻線２７，２７の鉄心挿入孔２８，２８に１動作で挿入する（図１２参照）。巻鉄心１１の脚鉄部ｂ，ｂには、表面に摩擦抵抗の少ないフィルムを備えた貼付部材１８，１９が取付けられているので、巻鉄心１１は大きな摩擦抵抗を受けることなく、円滑に巻線２７に挿入できる。
【００３４】
この際、巻鉄心１１の脚鉄部ｂ，ｂは貼付部材１８，１９によって剛性強化がはかられているので、前記巻鉄心１１は自重変形したりアモルファス鉄心２の欠損等を生じさせることなく、迅速・容易に巻線２７，２７への挿入を行うことができる。又、巻鉄心１１の接合部ｇを有しない継鉄部ｈ₁側は、図１０のように、特別に補強材等を用いての剛性強化がはかられていないので、この継鉄部ｈ₁の撓み力を有効利用することにより、巻鉄心１１の巻線２７への組立時、接合部ｇ側を開放した継鉄部ｈ，ｈと巻線１１の鉄心挿入孔２８，２８との位置決めが容易に行い得、巻鉄心１１を損傷することなく迅速・確実に巻線２７に挿入することができる。
【００３５】
前記巻線２７，２７への巻鉄心１１の脚鉄部ｂ，ｂの挿入が終了したら、図１２で示すように、巻線２７，２７から突出している巻鉄心１１の継鉄部ｈ，ｈに被せてあるガイドカバー３３（図１２では除去ずみ）と挿入保護帽２５を、巻鉄心１１の挿入方向あるいはその反対側から引き抜く等して図１３で示すように取り外す。この後、巻鉄心１１の開放された継鉄部ｈの最内層側より順次図１４で示すように、開放前の状態（内側）に折り曲げ、その接合部ｇを図１５で示すように再接合し、更に、外側補強枠１４を重合した部分をスポット溶接により固定することによって巻鉄心１１の再組立を終える。
【００３６】
前記のように、巻鉄心１１をＵ字状に開いて巻線２７，２７に挿入したり、挿入後に前記開放した継鉄部ｈを再接合する作業等においては、巻鉄心１１を構成するアモルファス鉄心２が焼鈍によって非常に脆くなっているが、脚鉄部ｂ，ｂは貼付部材１８，１９にて被覆されているので、巻線２７に巻鉄心１１を挿入する場合、アモルファス鉄心２が挿入時の衝撃によって金属破片が生じにくく、しかも、脚鉄部ｂ，ｂ自体に剛性強化がはかられていることと相まってこの結果、金属破片が巻鉄心１１の鉄心挿入孔２８に残留することはない。従って、変圧器の運転中に巻線２７の鉄心挿入孔２８から金属破片が絶縁油中に漏出して巻線２７の絶縁を劣化させるという問題を確実に阻止することができる。
【００３７】
前記のように、巻鉄心１１の再組立を終えたら、図１４，１５に示すように、巻線２７の軸方向端面と巻鉄心１１の継鉄部ｈ，ｈ₁との間に絶縁スペーサ３４を挿着して巻線２７，２７と巻鉄心１１とを固定する。この後、巻鉄心１１の継鉄部ｈ，ｈ₁に、それぞれクランプ部材（図示せず）を、巻線２７，２７の両端面との間に巻線押えを介して止着し、この状態で巻鉄心１１を図示しないケースに収容・固定し、絶縁油をケースに定量充填することによってアモルファス鉄心変圧器の製造を終える。
【００３８】
【発明の効果】
本発明は、以上説明したように、アモルファス鉄心からなる巻鉄心の脚鉄部に、上下一対の貼付部材を取付けて脚鉄部の剛性強化と金属破片の漏出防止をはかるようにしたので、巻鉄心の組立作業は巻鉄心全体を１動作で巻線に組込むことが可能となり、組立作業が迅速・容易に行えるとともに、金属破片の漏出が抑制できるので、巻線の絶縁劣化を良好に回避することができる。
【００３９】
又、貼付部材の取付けに際しては、脚鉄部の積層端面と一対の貼付部材のうち、それぞれの脚鉄部の積層端面と、これら積層端面と対応する貼付部材の橋絡部に塗布した接着剤により、前記一対の貼付部材を脚鉄部にこれを挟むようにして貼着し、つづいて、クリップ状の整形枠体をその内側に貼着したクッション材を巻鉄心の積層端面側に位置する前記貼付部材の橋絡部に押圧した状態で脚鉄部に一定時間挟持させて前記貼付部材を脚鉄部に強固に貼着することができるようにしたので、貼付部材は整形枠体のクッション材の押圧力を利用して巻鉄心の積層端面に良好に接着させることが可能となり、これにより、貼付部材を少ない接着剤にて巻鉄心の脚鉄部に経済的に、かつ、迅速・確実に、しかも、効率的に貼着することができる。その上、前記整形枠体は巻鉄心の脚鉄部に挟着させた場合、整形枠体の弾性力が脚鉄部に良好に作用して前記脚鉄部に挟持させることができるので、貼付部材を貼着した脚鉄部の積厚寸法を一定に保持させることが可能となり、これにより、拡開した巻鉄心の脚鉄部の巻線への挿入作業を良好に行うことができる等、脚鉄部の剛性強化を簡易に、かつ、経済的に図ることができる。
【００４０】
その上、貼付部材は巻鉄心の脚鉄部のみに取付けられているので、巻鉄心の組立時これをＵ字状に開拡して巻線に挿入する場合、開拡した巻鉄心の継鉄部と巻線の鉄心挿入孔との位置合せは、他方の継鉄部の撓み力を有効利用して容易に行うことが可能となり、しかも、脚鉄部の貼付部材の表面に摩擦抵抗の少ない絶縁部材の使用と相まって、巻鉄心の巻線への組立作業を迅速・容易に、しかも、効率的に行うことができ至便である。
【図面の簡単な説明】
【図１】非晶質磁性合金薄帯を切断し、巻回する装置の概略構成図である。
【図２】本発明において、焼鈍処理を行って巻鉄心を矩形状に成形した状態を示す平面図である。
【図３】同じく、脚鉄部に貼付部材を取付ける前の状態を示す平面図である。
【図４】同じく、巻鉄心を脚台に乗載して貼付部材の取付け前の状態を示す斜視図である。
【図５】巻鉄心と貼付部材とを分離して示す斜視図である。
【図６】巻鉄心に貼付部材を取付けた状態を示す斜視図である。
【図７】同じく、貼付部材を整形枠体にて挟持している状態を示す巻鉄心の斜視図である。
【図８】整形枠体の斜視図である。
【図９】巻鉄心の脚鉄部を縦断して示す断面図である。
【図１０】貼付部材を取付けた巻鉄心の斜視図である。
【図１１】巻鉄心を巻線に挿入する前の状態を示す斜視図である。
【図１２】巻鉄心を巻線に組込んだ状態を示す斜視図である。
【図１３】巻線に巻鉄心を挿入した状態を示す平面図である。
【図１４】巻線に挿入した巻鉄心を再接合している状態を示す平面図である。
【図１５】巻鉄心の組立が終了した状態を示す斜視図である。
【符号の説明】
２アモルファス鉄心
１１巻鉄心
１６接着部
１８，１９貼付部材
２０，２１整形枠体
ｂ，ｂ脚鉄部
ｇ接合部
ｈ，ｈ₁ 継鉄部[0001]
[Industrial application fields]
The present invention relates to an amorphous iron core transformer using a one-turn cut type wound iron core made of an amorphous magnetic alloy ribbon, and a method for manufacturing the same. The object of the present invention is to provide rigidity of a leg portion of the wound iron core. An object of the present invention is to provide a strengthened amorphous iron core transformer and a manufacturing method thereof.
[0002]
[Prior art]
In recent years, for example, various transformer cores using amorphous magnetic alloy ribbons (hereinafter referred to as amorphous iron cores) have been developed and put into practical use for distribution transformers. The amorphous core used as the transformer core is manufactured by super-quenching a melt of a magnetic alloy and has an excellent magnetic property with a very small iron loss, and a wound core is manufactured using this amorphous core. In many cases, for example, a so-called one-turn cut type wound core having a joint portion such as a butt joint or a lap joint in one yoke portion is manufactured today.
[0003]
The one-turn cut type wound core is, for example, a unit core body that is obtained by collecting a plurality of unit cores (20 to 30 pieces) obtained by cutting a strip-shaped amorphous core with a preset length dimension for each turn. The unit core body is further laminated into a plurality of layers to form a unit core block (hereinafter simply referred to as a “stack block”). When assembling the wound core, the laminated block is wound into a circular shape to form a unit core core. The two ends of the body are joined in a butted or overlapping manner while sequentially shifting in a staircase pattern, and this laminated block is further wound and laminated in the same manner as described above to obtain a predetermined laminated thickness. Constructed a wound iron core wound around.
[0004]
A one-turn cut type wound core laminated as described above is formed into a rectangular shape with a joint portion such as a butt positioned on one side of the yoke portion, and then subjected to magnetic field annealing. After the annealing, the wound core is The joint part of the yoke part is opened for each laminated block of the U-shaped laminated block with the joint part opened, and then inserted into the core insertion hole of the winding, and then inserted into the winding. By sequentially rejoining each joint portion of the laminated block for each laminated block, the interlinking of the magnetic circuit and the conductive circuit is finished, and the wound iron core is assembled.
[0005]
[Problems to be solved by the invention]
However, when manufacturing a one-turn cut type wound core as described above, there are the following problems.
(1) Amorphous iron cores have poor rigidity and are considerably weakened by annealing. Therefore, when an iron core is assembled by sequentially inserting laminated blocks into windings, If it collides with other laminated blocks, the corners and laminated end faces of the amorphous iron core can easily be lost or peeled off, resulting in metal fragments of the amorphous iron core. There was a problem of straying in and invading between the layers of the windings to deteriorate the insulation of the windings.
[0006]
(2) In addition, since amorphous iron cores are poor in rigidity, when assembling a wound core by dividing each laminated block individually, the shape of each laminated block is broken to form a rectangular shape for each laminated block. Since the iron core was assembled by opening it into a U-shape using the joints of its parts, its own weight deformation was likely to occur, thereby causing internal distortion and the like in the iron core itself, and adversely affecting its magnetic properties. . As a result, it is necessary to pay close attention to the assembly work of the wound core, and there has been a problem that the assembly work of this kind of wound core cannot be performed smoothly and efficiently.
[0007]
(3) Furthermore, since the amorphous iron core is manufactured very thinly and is considerably weakened by annealing, when each laminated block is incorporated in the winding in sequence, it is extremely poor in self-supporting property. Often end up in a state. For this reason, each laminated block is self-supporting using, for example, a special jig until the next laminated block is inserted into the winding, so that the assembly efficiency of the wound core using the amorphous iron core is increased. However, it was a major factor that hindered the productivity improvement of this kind of iron core.
[0008]
In view of the above-mentioned problems, the present invention aims to improve the rigidity of an amorphous iron core at the time of assembling the iron core, so that the assembling work to the winding of the wound iron core can be performed quickly and smoothly without impairing the magnetic properties. An object of the present invention is to provide an amorphous core transformer and a method for manufacturing the same, which can improve the productivity of a wound core transformer made of an iron core.
[0009]
[Means for Solving the Problems]
In the present invention, an amorphous magnetic alloy ribbon is wound, and at least one portion is cut and fitted into a rectangular wound core having a joint portion such as a butt, and a leg portion of the wound core. In an amorphous core transformer provided with a winding , a step of applying an adhesive to a laminated end surface of a leg portion of the wound core at a predetermined interval to form an adhesive portion, and forming the adhesive portion A pair of upper and lower adhesive members, and a pair of shaped frames formed by bending a metal steel plate into a U-shape from the outside of the pair of attached members. The bent piece is brought into contact with the outer peripheral surface of the leg portion, and the bridging portion of the shaping frame is pushed to the laminated end surface side of the leg portion and adhered to the inner side of the bridging portion. The cushion member is pressed and pressed, and the sticking member is pressed by the elastic force of the cushion member to laminate the leg portions. A step of adhering / holding to the surface, and opening the yoke portion having the joint portion of the wound iron core after unpinching the pasting member by the pair of shaping frames sandwiched between the leg portions via the pasting member And a step of inserting the wound iron core expanded in the U-shape into the winding and rejoining the expanded yoke portion. .
[0012]
In the present invention, by attaching a pair of upper and lower sticking members to the leg portion of the wound core, the amorphous iron core weakened by strengthening the rigidity of the leg iron portion and annealing is lost due to the impact force generated during the assembly of the wound core. This makes it possible to smoothly and satisfactorily assemble the wound core into the winding. Further, since the sticking member is divided into a pair of upper and lower parts, the attaching work can be easily performed, and the fastening means is made of an adhesive appropriately applied to one of the leg iron side and one of the sticking members. Since the pasting member is stuck to the leg portion so as to sandwich the pair of pasting members, the shaped frame is held for a certain period of time while maintaining the thickness of the leg portion by the shaping frame. The iron core made it possible to increase the rigidity of the leg part with a simple structure.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 1 denotes an amorphous magnetic alloy ribbon (hereinafter simply referred to as “amorphous iron core”) which is cut into a predetermined length dimension set in advance and wound to form a wound iron core. The cutting / winding device 1 shows a plurality of (three in this embodiment) drums 3 wound with an amorphous iron core 2 and a plurality of amorphous iron cores 2 rewound from the drums 3. The feeding roller 5 that feeds the cutting device 4 in the combined state, the cutting device 4 that cuts the amorphous iron core 2 fed from the feeding roller 5, and the amorphous iron core 2 cut by the cutting device 4 is wound up. An iron core winder 8 is sequentially wound around the shaft 6 in a circular shape via a winding belt 7.
[0014]
Next, a case where a one-turn cut type wound core is wound by the cutting / winding device 1 will be described. First, the amorphous iron cores 2 rewound from a plurality of drums 3 are respectively stacked and stacked, and are sequentially fed to a position of the cutting device 4 by a feed roller 5 in a predetermined length dimension and cut. Subsequently, for example, a plurality of core sheets 9 cut in the predetermined length dimension are stacked in a stepped manner on the alignment table 9a to form a core sheet group 10, and this core sheet group 10 is An annular iron core (not shown) is wound around the winding shaft 6 of the iron core winding machine 8 in a circular shape sequentially via a winding belt 7.
[0015]
When the annular core is wound, it is removed from the winding shaft 6, formed into a rectangular shape by a forming jig (not shown), subjected to magnetic field annealing, and formed into a rectangular shape as shown in FIG. 2. 11 is formed. In FIG. 2, reference numeral 13 denotes an inner reinforcing frame disposed inside the wound core 11, and 14 is an outer reinforcing frame disposed similarly to the outer side of the wound core 11, and each is formed of a silicon steel strip. Note that reference numeral 12 shown in FIG. 1 denotes a controller that automatically controls driving and stopping of the cutting device 4, the feed roller 5, the iron core winder 8, and the like.
[0016]
As shown in FIG. 2, the wound iron core 11 formed into a rectangular shape and subjected to magnetic field annealing maintains a favorable rectangular state due to the presence of the inner and outer reinforcing frames 13 and 14 even when a molding jig (not shown) is removed. Has been.
[0017]
Then yoke portion h of the winding core 11, and insert the pair of molding dies 15,15a as shown in FIG. 3 between h _1, followed, groove a of the molding die 15,15a, between a Then, the plate-shaped template 15b is press-fitted to maintain the rectangular state of the wound iron core 11, and in this state, one of the laminated end faces (see FIG. 3) of the pair of leg portions b, b of the wound iron core 11, for example, Then, an adhesive made of a room temperature curable epoxy resin or the like is applied at regular intervals, and an adhesive portion 16 is provided as shown in FIG. 3, and a relatively thin leaf insulating paper is formed using the adhesive portion 16. Affix to the leg portions b and b.
[0018]
That is, as shown in FIG. 2, the wound core 11 maintains the rectangular state of the wound core 11 using the molding dies 15 and 15a and the template 15b as shown in FIG. . Thereafter, it is hung by a lifting means (not shown) (electric hoist, electric lift, etc.), and the wound iron core 11 is mounted on a pair of leg stands 17, 17 as shown in FIG. Thereafter, even if the molding dies 15, 15a and the mold plate 15b are removed, the wound iron core 11 is well maintained in the rectangular state by the inner and outer reinforcing frames 13 and 14 without being deformed.
[0019]
Then, when the wound iron core 11 is mounted on the footrests 17 and 17, as shown in FIG. 4, the adhesive is only applied to the leg portions b and b on one of the laminated end faces (upper side in FIG. 4). A plurality of adhesive portions 16 are formed by applying at regular intervals. These adhesive portions 16 include, for example, an electrical polyester film processed paper as defined in JIS C2317 (consisting of a polyethylene terephthalate film and an insulating paper bonded to exert a buffering effect on the paper, hereinafter simply referred to as an insulating processed paper). Is attached to cover the upper half of the leg portions b and b.
[0020]
That is, as shown in FIG. 5, the insulating paper is bent in a U shape with a width dimension on the side of the laminated end surfaces of the leg portions b and b to provide a bridging portion c. The bent portion d connected to the bent portion is bent at a length that is half the width of the circumferential surfaces of the leg portions b and b, thereby forming U-shaped sticking members 18 and 18. And these sticking members 18 and 18 are bonded to the adhesion part 16 provided in the lamination | stacking end surface side of the wound iron core 11 by making the film side into the surface, and the bridging part of an insulating paper (back surface) part, leg part b , B is covered so as to be wrapped by the adhesive members 18 and 18, as shown in FIG.
[0021]
Next, a case where the lower half portions of the leg iron portions b and b of the wound iron core 11 are covered will be described. In this case as well, the use of a U-shaped adhesive member bent in the same manner as described above is the same, but the U-shaped adhesive members 19, 19 covering the lower half of the leg portions b, b are shown in FIG. to, the bridge c ₁ of insulating paper portion serving as pre inner surface (back surface), by applying an adhesive consisting of a room temperature curing epoxy resin or the like with a predetermined interval, a plurality of adhesive portions 19a Form.
[0022]
In the pasting of the pasting members 19, 19, as shown in FIG. 5, similarly to the upper pasting members 18, 18 on the laminated end face located below the leg portions b, b of the wound core 11. By abutting and adhering the bridging portion c ₁ , the lower side surfaces (lower half portions) of the leg portions b and b are covered with the adhering members 19 and 19. As a result, as shown in FIG. 6, the leg portions b and b are laminated end surfaces and inner and outer peripheries at the bridging portions c and c ₁ and the bent portions d and d _{1 of the} pair of upper and lower adhesive members 18 and 19, respectively. The surface can be completely covered.
[0023]
When the sticking of the sticking members 18 and 19 is completed, the stacking dimension of the leg portions b and b is subsequently maintained (the amorphous iron core is formed to be very thin compared to the silicon steel strip, and thus laminated after annealing. If the end surface is loosened, the entire wound core 11 tends to swell, so the thickness of the laminated end surface needs to be set and held constant) and the adhesive members 18 and 19 are bonded to the wound core 11. In order to ensure the reliability, as shown in FIG. 7, the uniform thickness of the wound iron core 11 is made uniform by sandwiching the shaped frames 20 and 21 having a U-shaped cross section between the leg portions b and b. Let it be maintained.
[0024]
As shown in FIG. 8, the shaping frames 20 and 21 for maintaining the uniform thickness thickness are formed by bending a metal steel plate into a U shape according to the thickness of the wound core 11, for example. _One end of one bent piece e of the pair of bent pieces e and e ₁ is bent (inclined) outward to form a bent portion e ₀ . When the shaping frames 20 and 21 are sandwiched between the leg iron portions b and b of the wound iron core 11, a cushion made of rubber, sponge or the like having an appropriate thickness inside the bridging portion f of the shaping frames 20 and 21. The material 22 is pasted in advance.
[0025]
Then, from the outside of the sticking members 18 and 19 made of insulating paper stuck to the leg iron portions b and b, the U-shaped shaping frames 20 and 21 are respectively attached to the pair of bent pieces e and e ₁ . When the bridging portion f of the shaping frames 20 and 21 is pushed to the laminated end surface side of the leg portions b and b in this state, the shaping frame 20 is brought into contact with the outer peripheral surface of the iron portions b and b. , 21 in a state where the bent pieces e, e ₁ are expanded by the leg portions b, b using the bent portion e ₀ provided on the bent piece e side, as shown in FIG. It is sandwiched between b and b.
[0026]
Thus, as shown in FIGS. 7 and 9, the shaping frames 20, 21 are attached to the pair of bent pieces e, from above and below the laminated end surfaces of the leg portions b, b of the wound core 11. By sandwiching using the curved portion e ₀ formed on _one side of e ₁ , the shaping frames 20 and 21 effectively utilize their elasticity and slide on the film surface of the surface of the pasting members 18 and 19. And can be easily sandwiched between the leg portions b and b.
[0027]
By sandwiching the shaping frames 20 and 21, the bonding members 18 and 19 attached to the leg portions b and b of the wound core 11 are pressed against the elastic force of the cushion material 22 by the bridging portions c and c _1. And it adhere | attaches on the lamination | stacking end surface of the leg iron parts b and b in flat shape via the adhesion part 16 and the adhesive agent part 19a. In addition, since the shaped frames 20 and 21 are formed of a metal steel plate in a U-shaped longitudinal section, when sandwiched between the leg portions b and b, the elastic force acts and the leg portions b and b are good. And the thickness of the leg portions b, b can be kept constant.
[0028]
As described above, when the attaching members 18 and 19 and the shaping frames 20 and 21 are attached to the leg portions b and b of the wound core 11, the bent portions d and d ₁ ( As shown in FIG. 10, the adhesive tape 23 is attached to the outer peripheral surface of the leg portions b and b, as shown in FIG. 10, between the free ends) and the bent portions d and d ₁ (free ends) and the leg portions b and b. And bonded to each other (the bent portions d and d ₁ may be temporarily fixed to the leg portions b and b with an adhesive instead of the adhesive tape 23). As a result, since the adhesive members 18 and 19 are attached to the leg portions b and b of the wound iron core 11 with the bridging portions c and c ₁ and the bent portions d and d ₁ adhered, the leg portions b and b will be hold | maintained in the state coat | covered with the sticking members 18 and 19 like FIG. Thereafter, when the bonding portion 16 and the adhesive portion 19a are cured, the shaped frame bodies 20 and 21 are removed from the leg portions b and b.
[0029]
Therefore, in the present invention, the leg portions b, b of the wound iron core 11 are deficient in the amorphous iron core 2 that has become brittle due to annealing by attaching the adhesive members 18, 19 made of insulating paper as shown in FIG. It is possible to satisfactorily prevent the peeling and peeling off, to prevent the wound core 11 itself from being deformed, and to enhance its rigidity to enhance the self-supporting property. This is because the adhesive members 18 and 19 are made of a relatively stiff insulating member in which a film and insulating paper are combined, and the use of the film is stopped and a plurality of kraft papers are used. It may be.
[0030]
After attaching the sticking members 18 and 19 to the wound iron core 11, the wound iron core 11 is mounted on the roller conveyor 24 via a sliding plate 24a, for example, by lifting means (not shown). The yoke part h where the joint part g of the wound core 11 is located is released from the outer reinforcing frame 14 and is opened outward using the joint part g. That is, the wound core 11 is expanded from the rectangular state so that the planar shape becomes a U-shape as shown in FIG. In addition, when the winding iron core 11 is opened, the leg portions b and b are sufficiently rigidly maintained by the adhesive members 18 and 19, respectively. Therefore, when the yoke h having the joint g is opened. In this case, the wound iron core 11 is not deformed by its own weight or deformed, and can be opened smoothly and satisfactorily in a U-shape.
[0031]
After the yoke h is opened at the joint g as described above, the tip is bent into a tapered shape from the pointed end of the yoke h to the leg portions b and b as shown in FIG. An insertion protection cap 25 made of brass or the like is abutted. The insertion protection cap 25 is missing when the end of the open yoke portion h of the wound core 11 is in contact with the inlet of the core insertion hole 28 (see FIG. 11) of the winding 27 when inserted into the winding 27. The problem of making the insertion into the winding 27 difficult by tilting inward or outward is sought.
[0032]
On the other hand, as shown in FIG. 11, the winding 27 into which the wound iron core 11 is inserted is mounted and fixed in parallel on a winding fixing device 29 provided in the middle of the roller conveyor 24. The winding fixing device 29 is configured to prevent the windings 27 and 27 from swinging when the winding iron core 11 is assembled. The pair of windings 27 mounted on the mounting table 30 are connected to the locking plate 31. The locking plate 31 is mounted and fixed on the mounting table 30 with the windings 27 and 27 being clamped as shown in FIG. 11. Further, the mounting table 30 is configured to be lifted and lowered by a certain size with reference to the top of the roller portion 32 of the roller conveyor 24 by lifting means (not shown). When the winding 27 is placed and fixed on the mounting table 30, the mounting table 30 is operated to adjust the top of the roller portion 32 and the lower surface of the iron core insertion hole 28 of the winding 27 to the same height.
[0033]
After the pair of windings 27 and 27 are fixed to the winding fixing device 29, the winding core 11 opened in a U-shape is previously provided with a sliding plate 24a on the roller conveyor 24 by a lifting means (not shown). Moreover, the open yoke part h side is positioned on the winding 27 side as shown in FIG. When inserting into the windings 27, 27, the guide cover 33 is placed outside the insertion protection cap 25 of the open yoke portion h, and in this state, the roller core 24 is slid on the roller conveyor 24 by the sliding plate 24 a. Is moved to the windings 27 and 27 side, and the leg portions b and b of the wound core 11 are inserted into the core insertion holes 28 and 28 of the windings 27 and 27 in one operation (see FIG. 12). Since the leg members b and b of the wound core 11 are provided with the adhesive members 18 and 19 having a film having a low frictional resistance on the surface, the wound core 11 is smoothly wound without receiving a large frictional resistance. Can be inserted into line 27.
[0034]
At this time, the leg iron portions b and b of the wound iron core 11 are strengthened by the adhesive members 18 and 19, so that the wound iron core 11 does not deform by its own weight or cause a loss of the amorphous iron core 2 or the like. Therefore, the windings 27 and 27 can be inserted quickly and easily. Further, the yoke h ₁ side that does not have the joint g of the wound iron core 11 is not specially strengthened by using a reinforcing material or the like as shown in FIG. By effectively utilizing the bending force of ₁ , the positioning of the yoke portions h, h with the joint g side open and the core insertion holes 28, 28 of the winding 11 when the winding core 11 is assembled to the winding 27 is performed. Can be easily performed and can be quickly and reliably inserted into the winding 27 without damaging the wound core 11.
[0035]
When the insertion of the leg portions b, b of the wound core 11 into the windings 27, 27 is completed, the yoke portions h, h of the wound core 11 protruding from the windings 27, 27 as shown in FIG. As shown in FIG. 13, the guide cover 33 (removed in FIG. 12) and the insertion protection cap 25 are removed from the insertion direction of the wound core 11 or from the opposite side. After that, as shown in FIG. 14, sequentially from the innermost layer side of the open yoke portion h of the wound iron core 11, it is bent to the state (inside) before opening, and the joint g is rejoined as shown in FIG. Further, the re-assembly of the wound core 11 is completed by fixing the overlapped portion of the outer reinforcing frame 14 by spot welding.
[0036]
As described above, when the wound iron core 11 is opened in a U shape and inserted into the windings 27, 27, or in the operation of rejoining the opened yoke portion h after insertion, etc., the amorphous material constituting the wound iron core 11 is used. Although the iron core 2 is very brittle by annealing, the leg iron portions b and b are covered with the adhesive members 18 and 19, so that when the wound iron core 11 is inserted into the winding 27, the amorphous iron core 2 is inserted. It is difficult for metal debris to be generated by the impact of time, and coupled with the fact that the leg portions b, b themselves are stiffened, as a result, the metal debris remains in the core insertion hole 28 of the wound core 11. Absent. Therefore, it is possible to reliably prevent the problem that metal fragments leak into the insulating oil from the iron core insertion hole 28 of the winding 27 and deteriorate the insulation of the winding 27 during the operation of the transformer.
[0037]
As described above, when the reassembly of the wound core 11 is completed, the insulating spacer 34 is provided between the axial end surface of the winding 27 and the yoke portions h and h ₁ of the wound core 11 as shown in FIGS. Are fixed to the windings 27 and 27 and the wound core 11. Thereafter, clamp members (not shown) are respectively attached to the yoke portions h and h ₁ of the wound iron core 11 between the windings 27 and 27 via winding pressers. Then, the wound iron core 11 is accommodated and fixed in a case (not shown), and the production of the amorphous iron core transformer is finished by filling the case with insulating oil.
[0038]
【The invention's effect】
As described above, the present invention attaches a pair of upper and lower sticking members to the leg portion of the wound iron core made of an amorphous iron core so as to increase the rigidity of the leg portion and prevent leakage of metal fragments. As for the assembly work of the iron core, it is possible to assemble the whole wound iron core into the winding in one operation, the assembly work can be done quickly and easily and the leakage of metal debris can be suppressed, and the insulation deterioration of the winding can be avoided well. be able to.
[0039]
Also, sticking during the mounting of the member, of the laminate end face and a pair of sticking member leg of portion, a laminated end surface of each leg of section, adhesive applied to the bridge of the adhering member corresponding to these laminated end surface The pair of sticking members are attached to the leg portions so as to sandwich the pair of sticking members, and the cushion material with the clip-shaped shaping frame attached to the inside thereof is positioned on the laminated end surface side of the wound iron core. Since the affixing member can be firmly adhered to the leg iron part by being clamped to the leg iron part for a certain period of time while being pressed against the bridging part of the member , the affixing member is a cushioning material of the shaping frame body. It becomes possible to adhere well to the laminated end surface of the wound core using the pressing force, and this makes it possible to economically, quickly and reliably attach the adhesive member to the leg portion of the wound core with a small amount of adhesive . And it can stick efficiently . In addition, when the shaping frame is sandwiched between the leg portions of the wound iron core, the elastic force of the shaping frame acts well on the leg portions so that the shaping frames can be sandwiched between the leg portions. It becomes possible to keep the stack thickness dimension of the leg part to which the member is attached, thereby making it possible to satisfactorily perform the insertion work into the winding of the leg part of the expanded core, etc. The rigidity of the leg portion can be easily and economically enhanced .
[0040]
In addition, since the affixing member is attached only to the leg iron portion of the wound core, when the wound core is expanded into a U-shape and inserted into the winding when assembled, the yoke of the expanded core is expanded. Alignment of the part and the iron core insertion hole of the winding can be easily performed by effectively using the bending force of the other yoke part, and there is little frictional resistance on the surface of the sticking member of the leg iron part Combined with the use of the insulating member, the assembly work of the wound core to the winding can be performed quickly, easily and efficiently, which is convenient.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of an apparatus for cutting and winding an amorphous magnetic alloy ribbon.
FIG. 2 is a plan view showing a state in which a wound iron core is formed into a rectangular shape by performing an annealing process in the present invention.
FIG. 3 is also a plan view showing a state before attaching a sticking member to the leg portion.
FIG. 4 is a perspective view showing a state before the adhesive member is attached with the wound iron core mounted on the footrest.
FIG. 5 is a perspective view showing a wound iron core and a sticking member separately.
FIG. 6 is a perspective view showing a state in which a sticking member is attached to a wound iron core.
FIG. 7 is a perspective view of a wound iron core showing a state where the sticking member is held between the shaping frames.
FIG. 8 is a perspective view of a shaping frame.
FIG. 9 is a cross-sectional view showing a leg portion of a wound core in a longitudinal manner.
FIG. 10 is a perspective view of a wound iron core to which a sticking member is attached.
FIG. 11 is a perspective view showing a state before a wound iron core is inserted into a winding.
FIG. 12 is a perspective view showing a state in which a wound iron core is incorporated in a winding.
FIG. 13 is a plan view showing a state in which a wound iron core is inserted into a winding.
FIG. 14 is a plan view showing a state where the wound iron core inserted into the winding is rejoined.
FIG. 15 is a perspective view showing a state where the assembly of the wound core is completed.
[Explanation of symbols]
2 Amorphous iron core 11 Rolled iron core 16 Adhesive parts 18, 19 Pasting members 20, 21 Shaped frame b, b Leg iron part g Joint part h, h ₁ yoke part

Claims

非晶質磁性合金薄帯を巻回し、かつ、少なくとも１ケ所を切断して突合せ等の接合部を備えた矩形状の巻鉄心と、前記巻鉄心の脚鉄部に嵌挿した巻線とを備えたアモルファス鉄心変圧器において、前記巻鉄心の脚鉄部の積層端面に接着剤を所定の間隔を保って複数箇所塗布して接着部を形成する工程と、前記接着部を形成した脚鉄部を上下一対の貼付部材にて被覆する工程と、前記一対の貼付部材の外側から金属鋼板をコ字形に折曲して形成した一対の整形枠体を、該整形枠体の一対の折曲片を脚鉄部の内，外周面に当接させ、かつ、前記整形枠体の橋絡部を脚鉄部の積層端面側に押動して該橋絡部の内側に貼着したクッション材を押圧した状態で挟着して、前記貼付部材を前記クッション材の弾性力により押圧して脚鉄部の積層端面に接着・保持させる工程と、前記貼付部材を介して脚鉄部に挟着した一対の整形枠体による前記貼付部材の挟持を解いた後巻鉄心をその接合部を有する継鉄部を開いてＵ字状に拡開する工程と、前記Ｕ字状に拡開した巻鉄心を巻線に挿入し、かつ、拡開した継鉄部を再接合する工程とを備えたことを特徴とするアモルファス鉄心変圧器の製造方法。 A rectangular wound iron core wound with an amorphous magnetic alloy ribbon and cut at least at one place and provided with a joint portion such as a butt, and a winding inserted into a leg iron portion of the wound iron core In the provided amorphous iron core transformer, a step of forming an adhesive portion by applying a plurality of adhesives to a laminated end surface of the leg portion of the wound iron core at a predetermined interval, and a leg portion having the adhesive portion formed A pair of upper and lower adhesive members, and a pair of shaped frames formed by bending a metal steel plate into a U-shape from the outside of the pair of adhesive members. A cushioning material attached to the inside of the bridging portion by pressing the bridging portion of the shaping frame body toward the laminated end surface of the leg iron portion. Adhering to the laminated end surface of the leg iron part by pressing and adhering the sticking member with the elastic force of the cushion material A step of holding, and opening the yoke portion having the joint portion of the wound iron core after unpinching the pasting member by a pair of shaping frames sandwiched between the leg portions via the pasting member and opening the U-shaped An amorphous iron core transformer comprising: a step of expanding the wire core, and a step of inserting the wound iron core expanded in the U-shape into the winding and rejoining the expanded yoke portion. Manufacturing method.