JP4554781B2

JP4554781B2 - Wire bending method

Info

Publication number: JP4554781B2
Application number: JP2000239022A
Authority: JP
Inventors: 武美堤野; 邦彦板羽; 章志岸本
Original assignee: 株式会社大平製作所
Priority date: 2000-08-07
Filing date: 2000-08-07
Publication date: 2010-09-29
Anticipated expiration: 2020-08-07
Also published as: JP2002045941A

Description

【０００１】
【発明の属する技術分野】
本発明は、ワイヤ曲げ方法に関する。
【０００２】
【従来の技術】
従来のこの種の装置として特公昭６３−１６２１４号公報に示すものがあった。即ち、この曲げ加工装置は、図１２〜１４のごとく、円筒状の素材ガイド２３の中心部軸方向に長尺の加工素材３を通すガイド孔２４を形成するとともに、上記素材ガイド２３の前端部に加工ヘッド２５を取付ける。この加工ヘッド２５は、上記ガイド孔２４に連らなって上記加工素材３を前方へ突出させるガイド孔２５ａを同心的に有する。上記素材ガイド２３の外周部に円筒状の曲げ方向決め体２６を回動自在に設け、この曲げ方向決め体２６の前端部に両側の軸支板部３７を設けるとともに、曲げ方向決め体２６をその軸線回りに回動させて曲げ方向を設定する。
【０００３】
上記曲げ方向決め体２６の両側の軸支板部３７に、上記加工ヘッド２５のガイド孔２５ａに対し直交する姿勢で支軸３８を設け、これに曲げ作動体３５を回動自在に取り付け、加工ヘッド２５から突出する加工素材３を、加工ヘッド２５の前端の開口端部を超点として曲げ加工する。
【０００４】
上記曲げ作動体３５は、上記加工ヘッド２５の前端の開口端部に対向近接する前面部３５ａおよびこの前面部３５ａの両側部に設けられて上記両側の支軸３８で回動自在に支持された両側の側板部３６を有する。上記前面部３５ａには、上記支軸３８に対し直交する方向に、一端から上記加工ヘッド２５の前端の開口端部に対向する位置まで、溝状の素材挿通部３９を形成される。この素材挿通部３９の最奥部を上記加工素材３の曲げ作動部３９ａとし、かつ、上記前面部３５ａの外面に、この前面部３５ａを固定刃として摺動して上記加工素材３を切断する切断刃６１を設ける。
【０００５】
そして曲げ作業に当たり、素材ガイド２３のガイド孔２４から加工ヘッド２５のガイド孔２５ａに長尺の加工素材３を通すとともに、この加工素材３の先端を曲げ作動体３５の素材挿通部３９に通して所望長さ送る。次いで、曲げ方向決め体２６の回動により曲げ作動体３５の曲げ方向を定め、かつ、曲げ作動体３５を所望角度へ回動して、素材挿通部３９の最奥部の曲げ作動部３９ａで加工素材３を押圧し、加工素材３を曲げ成形する。ついで、切断刃６１を移動して、固定刃である曲げ作動体３５の前面部３５ａとの間で曲げ成形した加工素材３を切断する。また、曲げ作動体３５を回動した状態で、その素材挿通部３９に通した加工素材３を連続して送ることにより、加工素材３を連続した曲線状に成形するものである。
【０００６】
【発明が解決しようとする課題】
しかしながら、このような従来技術では、ワイヤの材質や太さにより曲げ弾性が異なるため、入力した曲げ角度設定値に対し実際の曲げ角度が設定値通りとならない。このため、精度の良い曲げ加工が極めて困難であった。
本発明は上記課題を解決し、ほぼ設定値通りに曲げ加工が可能な方法を提供することを目的とする。
【０００７】
【課題を解決するための手段】
上記課題を解決するため、本発明の構成は次のとおりとする。即ち、第１構成の方法は、装置本体のヘッド回動軸に着脱自在とされたヘッド本体と、該ヘッド本体の一側面たるワイヤ送り方向に平行な正面に設けられ、前記ヘッド回動軸の中心部を通って送り出されてくるワイヤを案内する案内筒と、前記本体の先端付近に設けられた切断部と、前記本体の先端に設けられ、前記ワイヤの先端部分を通過案内し、前記ヘッド本体の正面に対し、直交方向に延びる棒状のマンドレルと、該マンドレルを中心に貫通させ、ヘッド本体の第１凹所内で、かつ、それの回りに回転可能に嵌挿された円盤状の曲げスリーブと、該曲げスリーブの外表面に突設された曲げ凸部と、前記曲げスリーブの回動手段と、前記曲げスリーブとマンドレルを一体的に進退させる手段と、前記切断部の駆動手段とを含み、前記マンドレルのヘッド本体の正面に露出している端面には、直径上に沿う案内溝と、該案内溝のワイヤ送り方向前方の他端において、円周方向に沿う案内面が連続して形成され、これらの案内溝に対する案内面の境界部には、ワイヤの最小屈曲半径を決めるノーズ部が形成され、ワイヤをマンドレルの案内溝から繰り出し、曲げスリーブを回動させて曲げ凸部で押し曲げるようにしたワイヤ曲げ装置を使用し、
曲げ作業に先立ち、マンドレル回りの曲げスリーブの回動角に対し、実際のワイヤの屈曲角度または屈曲半径を計測し、このような計測点を複数求め、これらをコンピュータに入力し、直角座標の一方軸に曲げスリーブ回動角，他方軸にワイヤ屈曲角度または屈曲半径をとり、前記計測値をプロットし、これらの点をもとに曲線または折れ線もしくは曲線と折れ線で関係線を求め、それを記憶させておき、曲げ作業に際し、コンピュータに設定屈曲角度または屈曲半径を入力し、これに対し前記関係線から曲げスリーブの回動角を求め、該回動角に応じた信号を曲げスリーブ回動モーターへ与えて曲げスリーブを回動させ、ワイヤを屈曲することである。
【０００９】
第２構成の方法は、第１構成に加え、前記切断部はワイヤ案内孔を持つ固定刃と、該固定刃に隣接して往復摺動自在とされたワイヤ案内孔を持つ可動刃とを含み、切断駆動部は前記可動刃に対し直交状に貫通するカム棒と、該カム棒に連結された駆動棒と、該駆動棒に接続された刃駆動ピストンシリンダーとを含むことである。
【００１０】
第３構成の方法は、第１構成に加え、前記曲げスリーブ回動部は、前記曲げスリーブに接続された伝動歯車と、該伝動歯車に係合した第１ラックと、該第１ラックに連結された駆動棒と、該駆動棒に連結された第２ラックと、該第２ラックに係合されたピニオンと、該ピニオンを回転させる曲げスリーブ回動モーターを含むことである。
【００１１】
第４構成の方法は、装置本体のヘッド回動軸に着脱自在とされたヘッド本体と、該ヘッド本体の一側面たるワイヤ送り方向に平行な正面に設けられ、前記ヘッド回動軸の中心部を通って送り出されてくるワイヤを案内する案内筒と、前記本体の先端付近に設けられた切断部と、前記本体の先端に設けられ、前記ワイヤの先端部分を通過案内し、前記ヘッド本体の正面に対し、直交方向に延びる棒状のマンドレルと、該マンドレルを中心に貫通させ、ヘッド本体の第１凹所内で、かつ、それの回りに回転可能に嵌挿された円盤状の曲げスリーブと、該曲げスリーブの外表面に突設された曲げ凸部と、前記曲げスリーブの回動手段と、前記曲げスリーブとマンドレルを一体的に進退させる手段と、前記切断部の駆動手段と、前記ヘッド本体を前記ワイヤの案内筒の軸線を中心として回動自在に前記装置本体に着脱自在に取り付け、前記ヘッド本体を回動させるヘッド回動部とを含み、
前記マンドレルのヘッド本体の正面に露出している端面には、直径上に沿う案内溝と、該案内溝のワイヤ送り方向前方の他端において、円周方向に沿う案内面が連続して形成され、これらの案内溝に対する案内面の境界部には、ワイヤの最小屈曲半径を決めるノーズ部が形成され、ワイヤをマンドレルの案内溝から繰り出し、曲げスリーブを回動させて曲げ凸部で押し曲げるようにしたワイヤ曲げ装置を使用し、曲げ作業に先立ち、マンドレル回りの曲げスリーブの回動角に対し、実際のワイヤの屈曲角度または屈曲半径を計測し、このような計測点を複数求め、これらをコンピュータに入力し、直角座標の一方軸に曲げスリーブ回動角，他方軸にワイヤ屈曲角度または屈曲半径をとり、前記計測値をプロットし、これらの点をもとに曲線または折れ線もしくは曲線と折れ線で関係線を求め、それを記憶させておき、曲げ作業に際し、コンピュータに設定屈曲角度または屈曲半径を入力し、これに対し前記関係線から曲げスリーブの回動角を求め、該回動角に応じた信号を曲げスリーブ回動モーターへ与えて曲げスリーブを回動させ、ワイヤを屈曲することである。
【００１２】
第５構成の方法は、第４構成に加え、前記ヘッド回動部は前記ヘッド本体の末端を着脱可能に取り付ける取付円板部と、該取付円板部で開口を覆われた駆動ケースと、該駆動ケースに対し、回動可能に支持されて軸心にワイヤ案内孔を持つヘッド回動軸と、該ヘッド回動軸に接続されたヘッド回動モーターとを含むことである。
【００１３】
第６構成の方法は、装置本体のヘッド回動軸に着脱自在とされたヘッド本体と、該ヘッド本体の一側面たるワイヤ送り方向に平行な正面に設けられ、前記ヘッド回動軸の中心部を通って送り出されてくるワイヤを案内する案内筒と、前記本体の先端付近に設けられた切断部と、前記本体の先端に設けられ、前記ワイヤの先端部分を通過案内し、前記ヘッド本体の正面に対し、直交方向に延びる棒状のマンドレルと、該マンドレルを中心に貫通させ、ヘッド本体の第１凹所内で、かつ、それの回りに回転可能に嵌挿された円盤状の曲げスリーブと、該曲げスリーブの外表面に突設された曲げ凸部と、前記曲げスリーブの回動手段と、前記曲げスリーブとマンドレルを一体的に進退させる手段と、前記切断部の駆動手段と、前記ヘッド本体を前記ワイヤの案内筒の軸線を中心として回動自在に前記装置本体に着脱自在に取り付け、前記ヘッド本体を回動させるヘッド回動部とを含み、前記回動軸に対し、同心、かつ、互いに回転変位可能に、前記曲げスリーブ回動部の円筒部（５５）および切断駆動部の円筒部（２５ｄ）が嵌挿され、かつ、前記切断駆動部の駆動棒（２４）および曲げスリーブ回動部の駆動棒（５３）は、取付円板部（７１）と支持円板部（７２）を貫通し、
前記マンドレルのヘッド本体の正面に露出している端面には、直径上に沿う案内溝と、該案内溝のワイヤ送り方向前方の他端において、円周方向に沿う案内面が連続して形成され、これらの案内溝に対する案内面の境界部には、ワイヤの最小屈曲半径を決めるノーズ部が形成され、ワイヤをマンドレルの案内溝から繰り出し、曲げスリーブを回動させて曲げ凸部で押し曲げるようにしたワイヤ曲げ装置を使用し、曲げ作業に先立ち、マンドレル回りの曲げスリーブの回動角に対し、実際のワイヤの屈曲角度または屈曲半径を計測し、このような計測点を複数求め、これらをコンピュータに入力し、直角座標の一方軸に曲げスリーブ回動角，他方軸にワイヤ屈曲角度または屈曲半径をとり、前記計測値をプロットし、これらの点をもとに曲線または折れ線もしくは曲線と折れ線で関係線を求め、それを記憶させておき、曲げ作業に際し、コンピュータに設定屈曲角度または屈曲半径を入力し、これに対し前記関係線から曲げスリーブの回動角を求め、該回動角に応じた信号を曲げスリーブ回動モーターへ与えて曲げスリーブを回動させ、ワイヤを屈曲することである。
【００１４】
【発明の実施の形態】
以下に本発明の実施態様を図面に示す一実施例にもとづき説明する。図１の全体正面図において、ワイヤコイル・スタンドＶ₁にためられたワイヤＷが、繰り出しガイドＶ₂を介してワイヤ送りローラＶ₃より右方の本発明装置へ送り込まれる。本発明装置の大略は、装置本体の駆動部ケース３に着脱自在とされたヘッド本体１と、該ヘッド本体の一側面たるワイヤ送り方向に平行な正面に設けられ、前記駆動部ケース３の中心部を通って送り出されてくるワイヤＷを案内する第１案内筒２ａと、前記本体の先端付近に設けられた切断部１０と、前記本体の先端に設けられ、前記ワイヤの先端部分を通過案内し、前記ヘッド本体の正面に対し、直交方向に延びる棒状のマンドレル３０と、該マンドレルを中心に貫通させ、かつ、それの回りに回転可能に嵌挿された円盤状の曲げスリーブ４０と、該曲げスリーブの外表面に突設された曲げ凸部４３とを含む。
【００１５】
図２〜図４において前記ヘッド本体１は、矩形筒状体１ａの先端側に半円筒体１ｂが結合され、末端側に取付フランジ体１ｃが結合されてなる。そして、表面に円筒第１凹所１ｄ、裏面に第２凹所１ｅを持ち、第２凹所はカバー板１ｆで覆われている。
【００１６】
前記ワイヤ案内部２はヘッド本体１の表面に取付板２ｃを介して固定された第１案内筒２ａと、それに同心に隣接され、駆動部ケース３の中心を貫通して設けられた第２案内筒２ｂからなる。
【００１７】
図２〜図５において、前記切断部１０では、前記ヘッド本体１の表面において、第１案内筒２ａの先端と第１凹所１ｄとの間に固定刃１２が設けられる。これは直方体状ブロックの一部分に形成される。即ち、ブロックの表面から底面方向に深くなり、かつ、一側面を開口させた摺動溝１２ｂが設けられる。そして、この摺動溝１２ｂ内に可動刃１３が、第１案内筒２ａに直交する方向に摺動自在に配置される。そして、固定刃１２および可動刃１３には、第１案内筒から出て来たワイヤを通す案内孔１２ａ，１３ａを持ち、両刃の接触面側の孔の隅角部が切刃となる。
【００１８】
従って、両刃の案内孔が同心でワイヤＷが通されている状態で、可動刃１３が次記カム棒２１の移動により動くと、ワイヤＷは切断される。
【００１９】
図２，図５，図７，図８において、切断駆動部２０は前記可動刃１３に対し直交状に貫通するカム棒２１と、中間棒２２，ターンバックル２３を介して駆動部ケース３から突出した駆動棒２４に連結され、更に、駆動部ケース３内の円筒体２５ａに結合される。そして、この円筒体の外周には鍔部２５ｂが突設され、これを挟む挟持片２５ｃが、ブラケット２５ｄに摺動自在に受けられた駆動軸２５ｅ先端に設けられ、この駆動軸２５ｅの末端に刃駆動ピストンシリンダー２６が接続される。
【００２０】
従って、刃駆動ピストンシリンダー２６が作動すると、駆動軸２５ｅを介して挟持片２５ｃが右に移動し、鍔部２５ｂを介して円筒体２５ａが右に移動し、これにより駆動棒２４が右に移動し、カム棒２１が右に動き、前記可動刃１３を、図５において斜下方に動かす。
【００２１】
図２，図３，図６において、マンドレル３０は、ヘッド本体１の第１，第２凹所１ｄ，１ｅ内に同心に立設され、先端から末端にかけて、中径円柱の案内部３１，小径円柱の中間部３２および大径円柱のボス部３３とよりなる。そして、該ボス部３３がヘッド本体のカバー板１ｆに軸方向摺動自在に案内されている。そして図６のように、案内部３１のヘッド本体１の正面に露出している端面には、直径上に沿う案内溝３１ａと、該案内溝のワイヤ送り方向前方の他端において、円周方向に沿う右回り（プラス）方向および左回り（マイナス）方向のプラス・マイナス約９０度の範囲で案内面３１ｂ，３１ｃが連続して形成される。そして、これらの案内溝３１ａに対する案内面３１ｂ，３１ｃの境界部には、ワイヤの最小屈曲半径を決めるノーズ部３１ｄ，３１ｅが形成される。
【００２２】
これにより、切断部１０の案内孔１２ａ，１３ａを通過して来たワイヤＷは案内溝３１ａを通って右方に突出し、次記曲げ凸部４３の回動により、ノーズ部３１ｄ，３１ｅを支えとして屈曲される。
【００２３】
図２，３において、曲げスリーブ４０も、ヘッド本体１の第１，第２凹所１ｄ，１ｅ内に側壁と底壁とに間隔を存して同心に収容され、かつ、前記マンドレル３０に同心に回転自在に嵌合される。案内部３１に嵌合した大径円盤部４１と、マンドレル中間部３２に嵌合した小径円筒部４２と、大径円盤部４１の表面に突設された曲げ凸部４３よりなる。
【００２４】
そして、通常は大径円盤部４１の表面はヘッド本体１の表面と面一であり、マンドレル３０の端面は大径円盤部４１の表面から突出し、ワイヤ案内溝３１ａがワイヤＷの経路内に位置する。これらにより、マンドレル３０は曲げスリーブ４０と共に軸方向に進退可能となり、かつ、曲げスリーブ４０は単独でマンドレル３０回りに回動可能となる。
【００２５】
図３，図７，図８，図９において、曲げスリーブ４０を回動させるための曲げスリーブ回動部５０は、前記曲げスリーブ４０に接続された伝動歯車列５１（従動歯車５１ａ，中間歯車５１ｂおよび駆動歯車５１ｃよりなる）と、該伝動歯車列に係合した第１ラック５２と、該第１ラックに連結されて途中にターンバックル５４を介した駆動棒５３とを持ち、これに直進回動作動部５５が接続される。
即ち、駆動棒５３に円筒体５５ａが結合され、この円筒体の外周には鍔部５５ｂが突設され、これを挟む挟持片５５ｃが第２ラック５５ｅに設けられる。該第２ラックにピニオン５５ｆが係合し、ピニオン軸５５ｇに減速機５６を介して、曲げスリーブ回動モーター５７が接続される。
【００２６】
従って、スリーブ回動モーター５７が作動するとピニオン軸５５と共にピニオン５５ｆが回動し、第２ラック５５ｅは図９において前後に移動し、それにつれて図７，図８において、挟持片５５ｃ，鍔部５５ｂ，円筒体５５ａを介して駆動棒５３が左右に移動し、図３において第１ラック５２を介して伝動歯列５１が回転し、これにより曲げスリーブ４０が回動することになる。
【００２７】
図３，図７で、マンドレル・曲げスリーブ進退部６０において、マンドレルボス部３３の末端付近にリンク６１を介して第１駆動棒６２ａが接続され、これが直交状態の連結棒６２ｃを介して中空の第２駆動棒６２ｂ（ワイヤＷの第２案内筒２ｂを貫通させている）に接続され、その末端に鍔部材６３，挟持片６４を介してマンドレル・曲げスリーブ進退モーターたるピストンシリンダー６５が接続される。
【００２８】
従って、ピストンシリンダー６５を作動すると、第２，第１駆動棒６２ｂ，６２ａが移動し、リンク６１を介してマンドレル３０と共に曲げスリーブ４０が軸方向に移動する。
【００２９】
図２，図３，図７，図８，図９において、ヘッド回動部７０は、前記ヘッド本体１の末端を着脱可能に取り付ける取付円板部７１と、該取付円板部でと一体となって駆動ケース３の開口で回転可能に支持される支持円板部７２と、その軸心に同心に接続され、かつ、軸心に同心にワイヤ第２案内筒２ｂと第２駆動棒６２ｂを貫通させるヘッド回動軸７３と、該ヘッド回動軸にホイール７４，その下側のウォーム７５，ウォーム軸７６を介して接続されたヘッド回動モーター７７とを持つ。
【００３０】
従って、ヘッド回動モーター７７を作動すると、ウォーム軸７３，ウォーム７５，ホイール７４を介してヘッド回動軸７３が支持円板部７２と取付円板部７１と共に回動し、ヘッド本体１が回動する。ここで、切断駆動部２０の駆動棒２４と曲げスリーブ回動部５０の駆動棒５３が前記円板部７１，７２を貫通しているので、これらの駆動棒２４，２５と共に円筒体２５ｄと円筒体５５ａも一体的に回動する。
【００３１】
このように、装置本体に固定された駆動ケース３内には、回動軸７３が回転自在に支持されてヘッド回動モーター７７により、回転される。そして、回動軸７３に対し、同心、かつ、互いに回転変位可能に、曲げスリーブ回動部の円筒部５５および切断駆動部の円筒体２５ａが嵌挿され、しかも、切断駆動部の駆動棒２４および曲げスリーブ回動部の駆動棒５３が取付円板部７１と支持円板部７２を貫通している。
【００３２】
従って、ヘッド本体１が回動するとき、切断駆動部２０，曲げスリーブ回動部５０およびマンドレル・曲げスリーブ進退部６０は、各々独立して作動できることとなる。
【００３３】
さて、曲げ作業に先立ち、マンドレル３０回りの曲げスリーブ４０（曲げ凸部４３）の回動角に対し、実際のワイヤの屈曲半径または屈曲角度を計測し、このような計測点（サンプルデータ）を複数求める。そして、これらをコンピュータに入力し、直角座標の一方軸に曲げスリーブ回動角，他方軸にワイヤの屈曲半径または屈曲角度をとり、前記計測値をプロットし、これらの点をもとに曲線または折れ線もしくは曲線と折れ線で関係線を求め、それを記憶させておく。
【００３４】
ここで図２において、サンプルデータの取り方は次のようになされる。先ず曲げスリーブ回動部５０を作動させて、曲げ凸部４３をワイヤＷの繰り出し経路を避けて上側に位置させる。次にワイヤＷをマンドレル３０の案内溝３１ａから右へ連続的に繰り出しておく。そして、曲げ凸部４３を右回り（プラス方向）に移動させ、それがワイヤＷの上側に僅かに接触したときの、曲げ凸部４３の位置（曲げスリーブ回動モータ５７の回転量に相当する電気信号パルス数）をプラス方向基準位置とし、そのパルス数を求める。
【００３５】
更に、曲げ凸部４３を右回りに作動させると、ワイヤは繰り出されつつアール（円弧状部）をもって下方に押し曲げられてゆき、このアール加工が可能な限界点の曲げ凸部４３の位置（パルス数）を限界位置とし、そのパルス数を求める。
【００３６】
そして、この限界値と前記プラス方向基準値の差を求め、それを１０で割った数値（測定間隔Ｑ）をサンプルデータ生成時の曲げ凸部４３（曲げスリーブ４０）の回動量に決める。そして、サンプルデータ生成時には、プラス方向基準値Ｐ₀に対し間隔Ｑずつ曲げ凸部４３を回動・停止してアール加工し、各々の値の時の屈曲半径を測定し記録していくのである。
【００３７】
即ち、ワイヤＷを連続的に繰り出し状態としておき、曲げ凸部４３を基準位置Ｐ₀からＰ₀＋Ｑ＝Ｐ₁の位置まで移動させて止める。すると、ワイヤＷは円弧状を描いて屈曲されて行く。そして、この屈曲半径がある一定値に定まって来たとき、ワイヤＷの送りを止め、この屈曲半径Ｒ₁を測定する。そして、曲げ凸部４３を逆方向に移動させてプラス方向基準位置Ｐ₀に戻す。次に切断部１０でワイヤＷを切断する。
【００３８】
次に、前記と同様に、再びワイヤＷを繰り出しながら、曲げ凸部４３を今度は、Ｐ₀＋２Ｑ＝Ｐ₂の位置まで移動させて止める。そして、ワイヤＷを繰り出しながら、その屈曲半径が一定となるところで止め、その屈曲半径Ｒ₂を測定する。以下同様にして、曲げ凸部４３の移動量を間隔Ｑずつ増加させて、その時のワイヤＷの屈曲半径を測定するのである。そして、これらのデータをコンピュータに入力して、図１０に示すような曲げ凸部４３の位置を横軸に、ワイヤＷの屈曲半径を縦軸にしたグラフを描かせ、記憶させておく。
【００３９】
次に図２において、曲げ凸部４３を左回りさせてワイヤＷを上方に屈曲させる場合は、曲げ凸部４３をワイヤＷの繰り出し経路を避けて下側に位置させる。そして、前記と同様にしてワイヤＷを繰り出し、曲げ凸部４３を左回り（マイナス方向）に移動させ、ワイヤＷの下側にかすかに接触した時の曲げ凸部４３の位置をマイナス方向基準位置とし、そのパルス数を求める。以下、前記プラス方向に屈曲させる時と同様にして、曲げ凸部４３の位置とワイヤＷの屈曲半径を測定し、グラフを作製・記憶させる。
【００４０】
以上はマンドレル３０のノーズ部３１ｄの屈曲半径よりも大なる半径のアール部をもってワイヤＷを屈曲する場合であった。しかし、ノーズ部３１ｄの屈曲半径で任意の角度で屈曲する場合も、次の点を除き、前記と同様になされる。相違するところは、ワイヤＷをノーズ部３１ｄを越えて適宜長さだけ繰り出し、この繰り出しを一時停止させて屈曲作業をする点である。この停止中に曲げスリーブ４０を所定角度回動させて曲げ凸部４３により屈曲し、その時の実際の屈曲角度を測定し記録するのである。そして、これらをパソコンに入力し、図１１のようにグラフを描かせるのである。
【００４１】
さて、実際の曲げ作業に際し、コンピュータに設定屈曲角度を入力し、これに対し前記関係線からマンドレル回動角を求め、該角度に応じた信号を曲げスリーブ回動モーター５７へ与えて曲げスリーブ４０を回動させ、ワイヤＷを屈曲する。
【００４２】
今、ワイヤをＬ字状に屈曲する実施例を図２で説明する。ワイヤを案内筒２ａ，２ｂを通して切断部１０を経てマンドレル３０の案内溝３１ａを通過させ、マンドレル３０の周縁からＬ₁だけ突出させてワイヤの送りを停止し、曲げスリーブ４０を角度Ｇ₁だけ回動させて、曲げ凸部４３でワイヤを押し曲げる。次に曲げスリーブ４０を逆転させ、原点復帰させ、ワイヤをマンドレル周縁からＬ₂だけ突出させてワイヤの送りを停止する。次にマンドレル３０と曲げスリーブ４０をヘッド本体１の表面から退避させ、切断部１０を作動させて切断する。
【００４３】
次に、ワイヤをＬ字状に屈曲し、次いで逆Ｌ字状に曲げる場合を説明する。ワイヤを案内筒に通して切断部を経てマンドレルの案内溝を通過させ、マンドレル出口からＬ₁だけ突出させてワイヤの送りを停止し、曲げスリーブを角度Ｇ₁だけ回動させて、曲げ凸部でワイヤを押し曲げる。次に曲げスリーブ４０を退避させ、ワイヤをＬ₂だけ送り、曲げスリーブ４０を進出させ、曲げスリーブ４０を角度Ｇ₂だけ逆転させて、曲げ凸部でワイヤを押し曲げる。次にワイヤをＬ₃だけ送って停止する。次にマンドレル３０と曲げスリーブを退避させ、切断部を作動させて切断する。
【００４４】
次に、ワイヤをＬ字状に屈曲し、次にその屈曲平面に対し角度を持った平面内でＬ字状に屈曲する場合を説明する。ワイヤを案内筒に通して切断部を経てマンドレル案内溝を通過させ、マンドレル出口からＬ₁だけ突出させてワイヤの送りを停止し、曲げスリーブを角度Ｇ₁だけ回動させて、曲げ凸部でワイヤを押し曲げる。次に曲げスリーブを退避させ、ワイヤをＬ₂だけ送り、ヘッド本体を角度Ｆ₁だけ回動させ、曲げスリーブを角度Ｇ₂だけ正転させて、曲げ凸部でワイヤを押し曲げる。次にワイヤをＬ₃だけ送って停止し、マンドレルと曲げスリーブを退避させ、切断部を作動させて切断する。
【００４５】
本発明は前記した実施例や実施態様に限定されず、特許請求の精神および範囲を逸脱せずに種々の変形を含む。
【００４６】
【発明の効果】
本発明により、ワイヤの材質や太さに応じて、精度のよい屈曲加工が可能となった。
【図面の簡単な説明】
【図１】本発明に使用される装置の一実施例の概略正面図である。
【図２】本発明に使用される装置の一実施例のヘッド部の正面図である。
【図３】図２のＡ―Ａ断面図である。
【図４】図２のＢ―Ｂ断面図である。
【図５】切断部の分解斜視図である。
【図６】マンドレルの斜視図である。
【図７】駆動部の縦断面図である。
【図８】図７のＣ―Ｃ断面図である。
【図９】図７のＤ―Ｄ断面図である。
【図１０】曲げ凸部の移動量に対するワイヤ屈曲半径のグラフである。
【図１１】曲げ凸部の移動量に対するワイヤ屈曲角度のグラフである。
【図１２】従来技術の縦断面図である。
【図１３】図１２の右側面図である。
【図１４】従来技術の横断面図である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wire bending method.
[0002]
[Prior art]
A conventional device of this type is shown in Japanese Patent Publication No. 63-16214. That is, as shown in FIGS. 12 to 14, the bending apparatus forms a guide hole 24 through which the long processed material 3 passes in the axial direction of the central portion of the cylindrical material guide 23, and the front end portion of the material guide 23. Attach the machining head 25 to the surface. The machining head 25 has a guide hole 25a concentrically connected to the guide hole 24 for projecting the workpiece 3 forward. A cylindrical bending direction determining body 26 is rotatably provided on the outer periphery of the material guide 23, and both side support plates 37 are provided at the front end of the bending direction determining body 26, and the bending direction determining body 26 is The bending direction is set by turning around the axis.
[0003]
A support shaft 38 is provided on the shaft support plate portions 37 on both sides of the bending direction determining body 26 in a posture orthogonal to the guide hole 25a of the processing head 25, and a bending operation body 35 is rotatably attached to the support shaft 38. The workpiece 3 protruding from the head 25 is bent with the opening end at the front end of the machining head 25 as a super point.
[0004]
The bending operation body 35 is provided on a front surface portion 35a facing and close to the opening end portion of the front end of the processing head 25 and on both side portions of the front surface portion 35a, and is rotatably supported by the support shafts 38 on both sides. It has side plate portions 36 on both sides. A groove-shaped material insertion portion 39 is formed in the front surface portion 35a from one end to a position facing the opening end portion of the front end of the processing head 25 in a direction orthogonal to the support shaft 38. The innermost portion of the material insertion portion 39 is a bending operation portion 39a of the processed material 3, and the processed material 3 is cut by sliding the front surface portion 35a as a fixed blade on the outer surface of the front surface portion 35a. A cutting blade 61 is provided.
[0005]
In the bending operation, the long processed material 3 is passed from the guide hole 24 of the material guide 23 to the guide hole 25 a of the processing head 25, and the tip of the processed material 3 is passed through the material insertion portion 39 of the bending operation body 35. Send the desired length. Next, the bending direction of the bending operation body 35 is determined by the rotation of the bending direction determining body 26, and the bending operation body 35 is rotated to a desired angle. The processed material 3 is pressed and the processed material 3 is bent. Next, the cutting blade 61 is moved to cut the workpiece 3 that has been bent and formed with the front surface portion 35a of the bending operation body 35 that is a fixed blade. Further, the processed material 3 is formed into a continuous curved shape by continuously feeding the processed material 3 passed through the material insertion portion 39 in a state where the bending operation body 35 is rotated.
[0006]
[Problems to be solved by the invention]
However, in such a conventional technique, since the bending elasticity differs depending on the material and thickness of the wire, the actual bending angle does not become the set value with respect to the input bending angle setting value. For this reason, accurate bending has been extremely difficult.
An object of the present invention is to solve the above-described problems and to provide a method capable of bending work substantially according to a set value.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the configuration of the present invention is as follows. That is, the method of the first configuration includes a head body that is detachably attached to a head rotation shaft of the apparatus body, and one side surface of the head body. Parallel to the wire feed direction A guide tube provided on the front surface for guiding the wire fed through the center of the head rotation shaft, a cutting portion provided near the tip of the main body, and provided at the tip of the main body, A wire-shaped mandrel extending in the orthogonal direction with respect to the front surface of the head body, and passing through the mandrel as a center, guiding the tip of the wire through In the first recess of the head body, A disc-shaped bending sleeve rotatably fitted around the bending sleeve; a bending projection protruding from the outer surface of the bending sleeve; a rotating means of the bending sleeve; the bending sleeve and the mandrel; A guide groove extending along the diameter on the end surface exposed to the front surface of the head body of the mandrel, Front of the guide groove in the wire feed direction A guide surface along the circumferential direction is continuously formed at the other end of the wire, and a nose portion for determining a minimum bending radius of the wire is formed at a boundary portion of the guide surface with respect to these guide grooves, and the wire is guided by the mandrel. Using a wire bending device that extends from the groove, rotates the bending sleeve and pushes and bends it at the bending projection,
Prior to the bending work, measure the actual wire bending angle or bending radius with respect to the rotation angle of the bending sleeve around the mandrel, determine multiple such measurement points, enter these into the computer, and enter one of the rectangular coordinates. Take the bending sleeve rotation angle on the axis and the wire bending angle or bending radius on the other axis, plot the measured values, and based on these points, find the relationship line by curve or polygonal line or curve and polygonal line, and store it In the bending operation, a set bending angle or bending radius is input to the computer, the rotation angle of the bending sleeve is obtained from the relation line, and a signal corresponding to the rotation angle is sent to the bending sleeve rotation motor. And bending the wire by rotating the bending sleeve.
[0009]
The second configuration method is The second 1 In addition to the configuration, the cutting portion includes a fixed blade having a wire guide hole and a movable blade having a wire guide hole which is slidably reciprocally adjacent to the fixed blade, and the cutting drive unit is attached to the movable blade. A cam rod penetrating perpendicularly to the cam rod, a drive rod connected to the cam rod, and a blade drive piston cylinder connected to the drive rod.
[0010]
The third configuration method is The second 1 In addition to the configuration, the bending sleeve rotating portion includes a transmission gear connected to the bending sleeve, a first rack engaged with the transmission gear, a drive rod connected to the first rack, and the drive rod. A second rack coupled to the second rack, a pinion engaged with the second rack, and a bending sleeve rotation motor for rotating the pinion.
[0011]
A method of the fourth configuration includes a head body that is detachable from a head rotation shaft of the apparatus body, and one side surface of the head body. Parallel to the wire feed direction A guide tube provided on the front surface for guiding the wire fed through the center of the head rotation shaft, a cutting portion provided near the tip of the main body, and provided at the tip of the main body, A wire-shaped mandrel extending in the orthogonal direction with respect to the front surface of the head body, and passing through the mandrel as a center, guiding the tip of the wire through In the first recess of the head body, A disc-shaped bending sleeve rotatably fitted around the bending sleeve; a bending projection protruding from the outer surface of the bending sleeve; a rotating means of the bending sleeve; the bending sleeve and the mandrel; Means for moving forward and backward integrally, a drive means for the cutting part, and the head main body detachably attached to the apparatus main body so as to be rotatable about the axis of the guide tube of the wire, and the head main body is rotated. And a head rotating part to be
On the end surface exposed on the front surface of the head body of the mandrel, a guide groove along the diameter, Front of the guide groove in the wire feed direction A guide surface along the circumferential direction is continuously formed at the other end of the wire, and a nose portion for determining a minimum bending radius of the wire is formed at a boundary portion of the guide surface with respect to these guide grooves, and the wire is guided by the mandrel. Using a wire bending device that extends from the groove and rotates the bending sleeve to push and bend it at the bending projection, prior to the bending operation, the actual bending angle of the wire relative to the rotation angle of the bending sleeve around the mandrel Alternatively, the bending radius is measured, a plurality of such measurement points are obtained, and these are input to a computer, the bending sleeve rotation angle is set on one axis of the rectangular coordinates, the wire bending angle or bending radius is set on the other axis, and the measured value is obtained. Plot a curve or polygonal line or a relation line between the curve and the polygonal line based on these points, store it, and store it in the computer when bending. Then, the bending angle of the bending sleeve is obtained from the relationship line, and a signal corresponding to the turning angle is applied to the bending sleeve rotating motor to rotate the bending sleeve, To bend.
[0012]
The fifth configuration method is The second 4 In addition to the configuration, the head rotating part can be attached to and attached to the attachment disk part for detachably attaching the end of the head main body, the drive case whose opening is covered with the attachment disk part, and the drive case. And a head rotation shaft having a wire guide hole at the center of the shaft, and a head rotation motor connected to the head rotation shaft.
[0013]
A method of the sixth configuration includes a head main body that is detachable from a head rotation shaft of the apparatus main body, and one side surface of the head main body. Parallel to the wire feed direction A guide tube provided on the front surface for guiding the wire fed through the center of the head rotation shaft, a cutting portion provided near the tip of the main body, and provided at the tip of the main body, A wire-shaped mandrel extending in the orthogonal direction with respect to the front surface of the head body, and passing through the mandrel as a center, guiding the tip of the wire through In the first recess of the head body, A disc-shaped bending sleeve rotatably fitted around the bending sleeve; a bending projection protruding from the outer surface of the bending sleeve; a rotating means of the bending sleeve; the bending sleeve and the mandrel; Means for moving forward and backward integrally, a drive means for the cutting part, and the head main body detachably attached to the apparatus main body so as to be rotatable about the axis of the guide tube of the wire, and the head main body is rotated. A cylindrical portion of the bending sleeve rotating portion that is concentric with the rotating shaft and is capable of rotational displacement with respect to each other. (55) And cylindrical part of cutting drive (25d) And the drive rod of the cutting drive unit (24) And drive rod for bending sleeve rotating part (53) Is the mounting disc (71) And support disk (72) Through
On the end surface exposed on the front surface of the head body of the mandrel, a guide groove along the diameter, Front of the guide groove in the wire feed direction A guide surface along the circumferential direction is continuously formed at the other end of the wire, and a nose portion for determining a minimum bending radius of the wire is formed at a boundary portion of the guide surface with respect to these guide grooves, and the wire is guided by the mandrel. Using a wire bending device that extends from the groove and rotates the bending sleeve to push and bend it at the bending projection, prior to the bending operation, the actual bending angle of the wire relative to the rotation angle of the bending sleeve around the mandrel Alternatively, the bending radius is measured, a plurality of such measurement points are obtained, and these are input to a computer, the bending sleeve rotation angle is set on one axis of the rectangular coordinates, the wire bending angle or bending radius is set on the other axis, and the measured value is obtained. Plot a curve or polygonal line or a relation line between the curve and the polygonal line based on these points, store it, and store it in the computer when bending. Then, the bending angle of the bending sleeve is obtained from the relationship line, and a signal corresponding to the turning angle is applied to the bending sleeve rotating motor to rotate the bending sleeve, To bend.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below based on an embodiment shown in the drawings. In the overall front view of FIG. ₁ The wire W stored in the ₂ Wire feed roller V through _Three It is sent to the device of the present invention on the right side. The apparatus of the present invention is roughly composed of a head body 1 that is detachably attached to a drive unit case 3 of the apparatus body, and one side surface of the head body. Parallel to the wire feed direction A first guide tube 2a provided on the front surface for guiding the wire W fed out through the central portion of the drive unit case 3, a cutting portion 10 provided near the tip of the main body, and the tip of the main body A rod-shaped mandrel 30 extending in the orthogonal direction with respect to the front surface of the head main body, passing through the mandrel as a center, and rotatably fitted around the mandrel. It includes an inserted disc-shaped bending sleeve 40 and a bending projection 43 protruding from the outer surface of the bending sleeve.
[0015]
2 to 4, the head body 1 has a semi-cylindrical body 1b coupled to the distal end side of a rectangular cylindrical body 1a and an attachment flange body 1c coupled to the distal end side. The front surface has a cylindrical first recess 1d and the back surface has a second recess 1e. The second recess is covered with a cover plate 1f.
[0016]
The wire guide portion 2 includes a first guide tube 2a fixed to the surface of the head body 1 via a mounting plate 2c, and a second guide provided concentrically adjacent thereto and penetrating through the center of the drive unit case 3. It consists of a cylinder 2b.
[0017]
2 to 5, in the cutting portion 10, a fixed blade 12 is provided on the surface of the head body 1 between the tip of the first guide tube 2 a and the first recess 1 d. This is formed in a part of a rectangular parallelepiped block. That is, the sliding groove 12b that is deep in the bottom direction from the surface of the block and has one side surface opened is provided. The movable blade 13 is slidably disposed in the sliding groove 12b in a direction perpendicular to the first guide tube 2a. The fixed blade 12 and the movable blade 13 have guide holes 12a and 13a through which the wire coming out of the first guide tube passes, and the corners of the holes on the contact surface side of both the blades are cutting blades.
[0018]
Accordingly, when the movable blade 13 is moved by the movement of the cam rod 21 in a state where the guide holes of both the blades are concentric and the wire W is passed, the wire W is cut.
[0019]
2 and 5 FIG. 8, the cutting drive unit 20 is connected to a drive rod 24 projecting from the drive unit case 3 via a cam rod 21 penetrating perpendicularly to the movable blade 13, an intermediate rod 22, and a turnbuckle 23, Furthermore, it couple | bonds with the cylindrical body 25a in the drive part case 3. FIG. A flange 25b protrudes from the outer periphery of the cylindrical body, and a sandwiching piece 25c sandwiching the flange 25b is provided at the tip of the drive shaft 25e slidably received by the bracket 25d. A blade drive piston cylinder 26 is connected.
[0020]
Therefore, when the blade drive piston cylinder 26 is actuated, the clamping piece 25c moves to the right via the drive shaft 25e, and the cylindrical body 25a moves to the right via the flange 25b, whereby the drive rod 24 moves to the right. Then, the cam bar 21 moves to the right, and the movable blade 13 is moved obliquely downward in FIG.
[0021]
2 and 3 , FIG. The mandrel 30 is erected concentrically in the first and second recesses 1d and 1e of the head body 1, and from the tip to the end, the guide part 31 of the medium-diameter cylinder, the intermediate part 32 of the small-diameter cylinder, and the large-diameter It consists of a cylindrical boss 33. The boss portion 33 is guided to the cover plate 1f of the head body so as to be slidable in the axial direction. And as shown in FIG. 6, the guide groove 31a along the diameter on the end surface exposed to the front surface of the head body 1 of the guide portion 31, Front of the guide groove in the wire feed direction At the other end, guide surfaces 31b and 31c are continuously formed in a range of about plus or minus 90 degrees in the clockwise (plus) direction and the counterclockwise (minus) direction along the circumferential direction. And nose parts 31d and 31e which determine the minimum bending radius of a wire are formed in the boundary part of guide surfaces 31b and 31c to these guide grooves 31a.
[0022]
As a result, the wire W that has passed through the guide holes 12a and 13a of the cutting part 10 protrudes rightward through the guide groove 31a, and supports the nose parts 31d and 31e by the rotation of the bending convex part 43 described below. As bent.
[0023]
2 and 3, the bending sleeve 40 is also concentrically accommodated in the first and second recesses 1 d and 1 e of the head body 1 with a space between the side wall and the bottom wall, and concentric with the mandrel 30. It is fitted in freely rotating. A large-diameter disk portion 41 fitted to the guide portion 31, a small-diameter cylindrical portion 42 fitted to the mandrel intermediate portion 32, and a bending convex portion 43 protruding from the surface of the large-diameter disk portion 41.
[0024]
In general, the surface of the large-diameter disk portion 41 is flush with the surface of the head body 1, the end surface of the mandrel 30 protrudes from the surface of the large-diameter disk portion 41, and the wire guide groove 31 a is positioned in the path of the wire W. To do. As a result, the mandrel 30 can advance and retreat in the axial direction together with the bending sleeve 40, and the bending sleeve 40 can rotate around the mandrel 30 independently.
[0025]
3, 7, 8, and 9, a bending sleeve rotating portion 50 for rotating the bending sleeve 40 includes a transmission gear train 51 (driven gear 51a, intermediate gear 51b) connected to the bending sleeve 40. And a drive gear 51c), a first rack 52 engaged with the transmission gear train, and a drive rod 53 connected to the first rack and via a turnbuckle 54 in the middle thereof. The operation moving part 55 is connected.
That is, a cylindrical body 55a is coupled to the drive rod 53, and a flange portion 55b is projected from the outer periphery of the cylindrical body, and a sandwiching piece 55c sandwiching the flange 55b is provided on the second rack 55e. A pinion 55f is engaged with the second rack, and a bending sleeve rotating motor 57 is connected to the pinion shaft 55g via a speed reducer 56.
[0026]
Therefore, when the sleeve rotation motor 57 is operated, the pinion 55f is rotated together with the pinion shaft 55, and the second rack 55e is moved back and forth in FIG. 9, and accordingly, in FIG. 7 and FIG. The drive rod 53 moves to the left and right through the cylindrical body 55a, and the transmission tooth row 51 rotates through the first rack 52 in FIG. 3, whereby the bending sleeve 40 rotates.
[0027]
3 and 7, in the mandrel / bending sleeve advancing / retreating portion 60, a first drive rod 62a is connected to the vicinity of the end of the mandrel boss portion 33 via a link 61, which is hollow via a connecting rod 62c in an orthogonal state. A piston cylinder 65, which is a mandrel / bending sleeve advance / retreat motor, is connected to the second drive rod 62b (passing through the second guide cylinder 2b of the wire W) via a flange member 63 and a clamping piece 64. The
[0028]
Accordingly, when the piston cylinder 65 is operated, the second and first drive rods 62 b and 62 a are moved, and the bending sleeve 40 is moved in the axial direction together with the mandrel 30 via the link 61.
[0029]
2, FIG. 7, 8, and 9, the head rotating portion 70 is integrated with the attachment disc portion 71 detachably attaching the end of the head body 1 and the attachment disc portion of the drive case 3. A support disk 72 that is rotatably supported by the opening, and a head rotation shaft that is concentrically connected to the shaft center and passes through the wire second guide tube 2b and the second drive rod 62b concentrically with the shaft center. 73, and a head rotation motor 77 connected to the head rotation shaft via a wheel 74, a worm 75 below the wheel 74, and a worm shaft 76.
[0030]
Therefore, when the head rotation motor 77 is operated, the head rotation shaft 73 rotates together with the support disk portion 72 and the attachment disk portion 71 via the worm shaft 73, the worm 75, and the wheel 74, and the head body 1 rotates. Move. Here, since the drive rod 24 of the cutting drive portion 20 and the drive rod 53 of the bending sleeve rotating portion 50 penetrate the disk portions 71 and 72, the cylindrical body 25d and the cylinder together with these drive rods 24 and 25 are used. The body 55a also rotates integrally.
[0031]
In this way, the rotation shaft 73 is rotatably supported in the drive case 3 fixed to the apparatus main body and is rotated by the head rotation motor 77. The cylindrical portion 55 of the bending sleeve rotating portion and the cylindrical body 25a of the cutting drive portion are fitted and inserted into the rotation shaft 73 so as to be concentric and rotationally displaceable with each other, and the drive rod 24 of the cutting drive portion. The drive rod 53 of the bending sleeve rotating portion passes through the attachment disc portion 71 and the support disc portion 72.
[0032]
Therefore, when the head body 1 rotates, the cutting drive unit 20, the bending sleeve rotating unit 50, and the mandrel / bending sleeve advance / retreat unit 60 can operate independently.
[0033]
Prior to the bending operation, the actual wire bending radius or bending angle is measured with respect to the rotation angle of the bending sleeve 40 (bending convex portion 43) around the mandrel 30, and such measurement points (sample data) are obtained. Ask for more than one. Then, these are input to a computer, the bending sleeve rotation angle is taken on one axis of rectangular coordinates, the bending radius or bending angle of the wire is taken on the other axis, the measured values are plotted, and based on these points Curve or line or curve and line Find the relationship line and remember it.
[0034]
Here, in FIG. 2, the sample data is taken as follows. First, the bending sleeve rotating portion 50 is operated, and the bending convex portion 43 is positioned on the upper side while avoiding the feeding path of the wire W. Next, the wire W is continuously drawn out from the guide groove 31a of the mandrel 30 to the right. Then, the bending projection 43 is moved clockwise (plus direction), and when it slightly contacts the upper side of the wire W, the position of the bending projection 43 (corresponding to the rotation amount of the bending sleeve rotation motor 57). The number of electrical signal pulses) is defined as the positive reference position, and the number of pulses is obtained.
[0035]
Further, when the bending convex portion 43 is operated clockwise, the wire is pushed and bent downward with a rounded portion (arc-shaped portion) while being fed, and the position of the bending convex portion 43 at the limit point where this rounding is possible ( The number of pulses is determined as the limit position.
[0036]
Then, a difference between this limit value and the positive direction reference value is obtained, and a numerical value (measurement interval Q) divided by 10 is determined as a rotation amount of the bending convex portion 43 (bending sleeve 40) at the time of sample data generation. At the time of sample data generation, the positive direction reference value P ₀ On the other hand, the bending convex portion 43 is rotated and stopped by an interval Q and rounded, and the bending radius at each value is measured and recorded.
[0037]
That is, the wire W is continuously drawn out, and the bending projection 43 is moved to the reference position P. ₀ To P ₀ + Q = P ₁ Move to the position and stop. Then, the wire W is bent in an arc shape. Then, when the bending radius is fixed to a certain value, the feeding of the wire W is stopped, and the bending radius R ₁ Measure. And the bending convex part 43 is moved to a reverse direction, and plus direction reference position P ₀ Return to. Next, the wire W is cut by the cutting unit 10.
[0038]
Next, in the same manner as described above, while bending the wire W again, the bending convex portion 43 is now changed to P ₀ + 2Q = P ₂ Move to the position and stop. Then, while feeding out the wire W, the wire W is stopped where the bending radius becomes constant, and the bending radius R ₂ Measure. Similarly, the amount of movement of the bending projection 43 is increased by an interval Q, and the bending radius of the wire W at that time is measured. Then, these data are input to a computer, and a graph is drawn and stored with the position of the bending projection 43 as shown in FIG. 10 on the horizontal axis and the bending radius of the wire W on the vertical axis.
[0039]
Next, in FIG. 2, when bending the wire W upward by turning the bending convex portion 43 counterclockwise, the bending convex portion 43 is positioned on the lower side while avoiding the wire W feeding path. Then, in the same manner as described above, the wire W is fed out, the bending convex portion 43 is moved counterclockwise (minus direction), and the position of the bending convex portion 43 when slightly touching the lower side of the wire W is determined as the negative direction reference position. And the number of pulses is obtained. Thereafter, in the same manner as when bending in the plus direction, the position of the bending projection 43 and the bending radius of the wire W are measured, and a graph is produced and stored.
[0040]
The above is the case where the wire W is bent with a rounded portion having a radius larger than the bending radius of the nose portion 31 d of the mandrel 30. However, when bending at an arbitrary angle with the bending radius of the nose portion 31d, the same operation as described above is performed except for the following points. The difference is that the wire W is fed out by an appropriate length beyond the nose portion 31d, and this feeding is temporarily stopped for bending work. During this stop, the bending sleeve 40 is rotated by a predetermined angle and bent by the bending convex portion 43, and the actual bending angle at that time is measured and recorded. These are input to a personal computer and a graph is drawn as shown in FIG.
[0041]
In the actual bending operation, a set bending angle is input to the computer, a mandrel rotation angle is obtained from the relation line, and a signal corresponding to the angle is given to the bending sleeve rotation motor 57 to bend the bending sleeve 40. Is turned to bend the wire W.
[0042]
An embodiment in which the wire is bent in an L shape will now be described with reference to FIG. The wire is passed through the guide cylinders 2a and 2b, through the cutting portion 10 and through the guide groove 31a of the mandrel 30, and from the periphery of the mandrel 30, L ₁ Projecting the wire to stop the wire feeding, and the bending sleeve 40 is moved to the angle G ₁ The wire is pushed and bent by the bending convex portion 43. Next, the bending sleeve 40 is reversed to return to the origin, and the wire is moved from the periphery of the mandrel to L ₂ The wire feed is stopped by projecting only. Next, the mandrel 30 and the bending sleeve 40 are retracted from the surface of the head body 1 and the cutting part 10 is operated to cut.
[0043]
Next, a case where the wire is bent into an L shape and then bent into an inverted L shape will be described. Pass the wire through the guide tube, pass through the cutting groove and the mandrel guide groove, ₁ Project the wire to stop the wire feed and move the bending sleeve to the angle G ₁ Rotate only and bend the wire with the bending convex part. Next, the bending sleeve 40 is retracted, and the wire is L ₂ The bending sleeve 40 is advanced and the bending sleeve 40 is moved at an angle G. ₂ Just reverse and push and bend the wire at the bending projection. Next, wire L _Three Just stop sending. Next, the mandrel 30 and the bending sleeve are retracted, and the cutting part is operated to cut.
[0044]
Next, a case where the wire is bent into an L shape and then bent into an L shape within a plane having an angle with respect to the bending plane will be described. Pass the wire through the guide tube, pass through the mandrel guide groove through the cutting section, ₁ Project the wire to stop the wire feed and move the bending sleeve to the angle G ₁ Rotate only and bend the wire with the bending convex part. Next, the bending sleeve is retracted and the wire is moved to L ₂ Only feed the head body at angle F ₁ Turn the bending sleeve at an angle G ₂ The wire is pushed and bent at the bending convex part. Next, wire L _Three Stop by feeding only, retract the mandrel and bending sleeve, and operate the cutting part to cut.
[0045]
The present invention is not limited to the above-described embodiments and embodiments, but includes various modifications without departing from the spirit and scope of the claims.
[0046]
【The invention's effect】
According to the present invention, it is possible to perform an accurate bending process according to the material and thickness of the wire.
[Brief description of the drawings]
FIG. 1 shows the present invention. Equipment used for It is a schematic front view of one Example.
FIG. 2 Equipment used for It is a front view of the head part of one Example.
3 is a cross-sectional view taken along line AA in FIG.
4 is a cross-sectional view taken along the line BB of FIG.
FIG. 5 is an exploded perspective view of a cutting part.
FIG. 6 is a perspective view of a mandrel.
FIG. 7 is a longitudinal sectional view of a drive unit.
8 is a cross-sectional view taken along the line CC of FIG.
9 is a cross-sectional view taken along the line DD of FIG.
FIG. 10 is a graph of the wire bending radius with respect to the movement amount of the bending convex portion.
FIG. 11 is a graph of the wire bending angle with respect to the movement amount of the bending convex portion.
FIG. 12 is a longitudinal sectional view of the prior art.
13 is a right side view of FIG.
FIG. 14 is a cross-sectional view of the prior art.

Claims

A head main body which is detachably attached to the head rotation shaft of the apparatus main body, and a front surface parallel to the wire feed direction which is one side surface of the head main body, are fed out through the central portion of the head rotation shaft. A guide tube for guiding the wire, a cutting portion provided near the tip of the main body, a guide tube provided at the tip of the main body, passing through the tip portion of the wire, and perpendicular to the front surface of the head main body. An extending rod-shaped mandrel, a disc-shaped bending sleeve that is inserted through the mandrel in the center and is rotatably inserted in and around the first recess of the head body, and an outer surface of the bending sleeve A projecting bending convex portion, a rotating means for the bending sleeve, a means for moving the bending sleeve and the mandrel together, and a driving means for the cutting portion,
A guide groove along the diameter and a guide surface along the circumferential direction are continuously formed on the end surface exposed on the front surface of the head body of the mandrel, and at the other end of the guide groove in the wire feeding direction. The nose portion that determines the minimum bending radius of the wire is formed at the boundary portion of the guide surface with respect to these guide grooves, the wire is fed out from the guide groove of the mandrel, and the bending sleeve is rotated and pushed and bent by the bending convex portion. Using the wire bending device
Prior to the bending work, measure the actual wire bending angle or bending radius with respect to the rotation angle of the bending sleeve around the mandrel, determine multiple such measurement points, enter these into the computer, and enter one of the rectangular coordinates. Take the bending sleeve rotation angle on the axis and the wire bending angle or bending radius on the other axis, plot the measured values, and based on these points, find the relationship line by curve or polygonal line or curve and polygonal line, and store it Let me know
At the time of bending work, a set bending angle or bending radius is input to the computer, and the rotation angle of the bending sleeve is obtained from the relation line, and a signal corresponding to the rotation angle is given to the bending sleeve rotation motor for bending. A wire bending method, wherein a wire is bent by rotating a sleeve.

The cutting portion includes a fixed blade having a wire guide hole, and a movable blade having a wire guide hole that is reciprocally slidable adjacent to the fixed blade, and the cutting drive portion is orthogonal to the movable blade. The wire bending method according to claim 1, further comprising: a penetrating cam bar; a driving bar coupled to the cam bar; and a blade driving piston cylinder connected to the driving bar.

The bending sleeve rotating unit includes a transmission gear connected to the bending sleeve, a first rack engaged with the transmission gear, a drive rod connected to the first rack, and a drive rod connected to the drive rod. The wire bending method according to claim 1, further comprising a second rack, a pinion engaged with the second rack, and a bending sleeve rotating motor for rotating the pinion.

A head main body which is detachably attached to the head rotation shaft of the apparatus main body, and a front surface parallel to the wire feed direction which is one side surface of the head main body, are fed out through the central portion of the head rotation shaft. A guide tube for guiding the wire, a cutting portion provided near the tip of the main body, a guide tube provided at the tip of the main body, passing through the tip portion of the wire, and perpendicular to the front surface of the head main body. An extending rod-shaped mandrel, a disk-shaped bending sleeve that is inserted through the mandrel in the center and is rotatably inserted in and around the first recess of the head body, and an outer surface of the bending sleeve A projecting bending convex portion, a turning means for the bending sleeve, a means for moving the bending sleeve and the mandrel together, and a driving means for the cutting portion;
A head rotating section for removably attaching the head main body to the apparatus main body so as to be rotatable about the axis of the guide cylinder of the wire, and for rotating the head main body;
A guide groove along the diameter and a guide surface along the circumferential direction are continuously formed on the end surface exposed on the front surface of the head body of the mandrel, and at the other end of the guide groove in the wire feeding direction. The nose portion that determines the minimum bending radius of the wire is formed at the boundary portion of the guide surface with respect to these guide grooves, the wire is fed out from the guide groove of the mandrel, and the bending sleeve is rotated and pushed and bent by the bending convex portion. Using the wire bending device
Prior to the bending work, measure the actual wire bending angle or bending radius with respect to the rotation angle of the bending sleeve around the mandrel, determine multiple such measurement points, enter these into the computer, and enter one of the rectangular coordinates. Take the bending sleeve rotation angle on the axis and the wire bending angle or bending radius on the other axis, plot the measured values, and based on these points, find the relationship line by curve or polygonal line or curve and polygonal line, and store it Let me know
At the time of bending work, a set bending angle or bending radius is input to the computer, and the rotation angle of the bending sleeve is obtained from the relation line, and a signal corresponding to the rotation angle is given to the bending sleeve rotation motor for bending. A wire bending method, wherein a wire is bent by rotating a sleeve.

The head rotating portion is supported by a mounting disc portion for detachably attaching the end of the head main body, a drive case whose opening is covered by the mounting disc portion, and a pivotable movement relative to the drive case. 5. The wire bending method according to claim 4, further comprising: a head rotation shaft having a wire guide hole at the shaft center; and a head rotation motor connected to the head rotation shaft.

A head main body which is detachably attached to the head rotation shaft of the apparatus main body, and a front surface parallel to the wire feed direction which is one side surface of the head main body, are fed out through the central portion of the head rotation shaft. A guide tube for guiding the wire, a cutting portion provided near the tip of the main body, a guide tube provided at the tip of the main body, passing through the tip portion of the wire, and perpendicular to the front surface of the head main body. An extending rod-shaped mandrel, a disc-shaped bending sleeve that is inserted through the mandrel in the center and is rotatably inserted in and around the first recess of the head body, and an outer surface of the bending sleeve Bending projections protruding, means for rotating the bending sleeve, means for moving the bending sleeve and the mandrel together, driving means for the cutting part, and the head main body of the guide tube of the wire axis The rotatably detachably attached to the apparatus main body as the center, and a head rotating portion for rotating said head body,
The cylindrical portion (55) of the bending sleeve rotating portion and the cylindrical portion (25d) of the cutting drive portion are fitted and inserted into the concentric and rotationally displaceable with respect to the rotating shaft, and the cutting drive portion The drive rod (24 ) and the drive rod (53) of the bending sleeve rotating portion penetrate the mounting disc portion (71) and the support disc portion (72) ,
A guide groove along the diameter and a guide surface along the circumferential direction are continuously formed on the end surface exposed on the front surface of the head body of the mandrel, and at the other end of the guide groove in the wire feeding direction. The nose portion that determines the minimum bending radius of the wire is formed at the boundary portion of the guide surface with respect to these guide grooves, the wire is fed out from the guide groove of the mandrel, and the bending sleeve is rotated and pushed and bent by the bending convex portion. Using the wire bending device
Prior to the bending work, measure the actual wire bending angle or bending radius with respect to the rotation angle of the bending sleeve around the mandrel, determine multiple such measurement points, enter these into the computer, and enter one of the rectangular coordinates. Take the bending sleeve rotation angle on the axis and the wire bending angle or bending radius on the other axis, plot the measured values, and based on these points, find the relationship line by curve or polygonal line or curve and polygonal line, and store it Let me know
At the time of bending work, a set bending angle or bending radius is input to the computer, and the rotation angle of the bending sleeve is obtained from the relation line, and a signal corresponding to the rotation angle is given to the bending sleeve rotation motor for bending. A wire bending method, wherein a wire is bent by rotating a sleeve.