JP3810987B2 - Wire forming equipment - Google Patents

Wire forming equipment Download PDF

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Publication number
JP3810987B2
JP3810987B2 JP2000158057A JP2000158057A JP3810987B2 JP 3810987 B2 JP3810987 B2 JP 3810987B2 JP 2000158057 A JP2000158057 A JP 2000158057A JP 2000158057 A JP2000158057 A JP 2000158057A JP 3810987 B2 JP3810987 B2 JP 3810987B2
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Japan
Prior art keywords
wire
tool
wire rod
coil
guide
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JP2000158057A
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Japanese (ja)
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JP2001340931A (en
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憲史 阿比留
裕雄 藤井
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Asahi Seiki Manufacturing Co Ltd
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Asahi Seiki Manufacturing Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は線材を巻回する線材成形装置に関し、特に線材の断面が矩形状であるばね素材からコイルを成形する場合に、コイル成形軸線方向に対して矩形断面の長辺方向が平行する巻回、または長辺方向が直交する巻回を行う線材成形装置に係るものである。
【0002】
【従来の技術】
コイルばね成形装置のような線材成形装置における線材の送り装置としては、例えば少なくとも1対の送り出しローラによって線材を線材ガイドから送り出す装置として特開平10−156469号公報に開示された送り装置が従来から知られている(以下従来技術Aという)。また、異形材を素材ガイドから送り出す装置として、特公昭52−40633号公報に開示された送り装置が従来から知られている(以下従来技術Bという)。
【0003】
また、コイルばね成形装置のような線材成形装置における線材の切断装置としては、前記従来技術Aのように、巻回されたコイルばねの内周が当接する半円形状の芯金の切刃面上端に形成された切刃と、進退可能な切断工具の先端に形成された切刃との剪断作用によってコイルばね終端を切断する方法が示されている。
【0004】
【発明が解決しようとする課題】
断面形状の短辺と長辺との比が数倍なる矩形材を、少なくとも1対の送り出しローラによって対向2辺を上下方向で挟持して1対の送り出しローラの回転に従い送り出しローラと矩形材との摩擦力により矩形材を強制移送し、線材ガイドの穴を通って矩形材加工領域に送り出す場合において、従来技術Aのものでは、上下1対の送り出しローラの各軸線と、巻回工具により巻回されるコイル軸線とが平行であるので、コイルの成形軸線方向と線材の矩形断面の長辺方向とが平行である矩形材のコイルを巻回するときには、1対の送り出しローラは長辺を上下から挟持して矩形材を送ればよいから、矩形材を座屈させることなく送ることができる。しかし、コイル軸線方向と線材の矩形断面の長辺方向とが直交する矩形材のコイルを巻回するときには、送り出しローラは短辺を上下から挟圧して矩形材を送らねばならないため、矩形材は1対の送り出しローラの挟持力で長辺が座屈したり、1対の送り出しローラの回転に従って矩形材が強制的に送られるときにこの部位で矩形材が送り出し方向に潰され座屈するという問題があった。
【0005】
また、従来技術Bのものでは、図11に示すように1対の送り出しローラ101,101の各軸線と、巻回工具103A,103Bにより巻回されるコイル軸線とは直角をなしている。すなわち、線材の断面形状が矩形であるコイルを巻回する場合に、コイルの成形軸線方向と線材の矩形断面の長辺方向とが直交する矩形材のコイルを巻回するときには、1対の送り出しローラ101,101は対向する長辺を上下から挟持して矩形材を送ることになるため、矩形材が座屈変形することなく送ることができる。しかし、コイルの成形軸線方向と線材の矩形断面の長辺方向とが平行である矩形材のコイルを巻回するときには、送り出しローラ101,101は短辺を上下から挟持して矩形材を送らなければならないため、矩形材が送り出しローラの押圧で座屈したり、送り出しローラが矩形材を強制送りするときにこの部位で座屈したりするという問題があった。
【0006】
また、線材成形装置における線材の切断装置として、従来技術Aは、従来技術Bを示す図11(b)に切断部分を挿入して説明すると、矩形材加工領域において湾曲加工されたコイルを芯金工具105の切刃に位置する部位で、切断工具104が芯金工具105の切刃と協働して矩形長辺方向に剪断するときに、矩形材の長辺方向から真っ直ぐに切断するようになるため矩形材が座屈してきれいに切断できないという問題があった。
【0007】
本発明は従来の技術の上述のような問題に対してなされたものであり、その目的とするところは、供用する線材ごとの工具部材のみを取り替える簡単容易な対応で、矩形材のコイル成形においてコイル軸線と矩形材の長辺が直交する場合、平行する場合の両方に適合させることができ、また従来技術Aのような機械にも特別改造することなく実施できる線材成形装置を提供しようとするものである。
【0008】
【課題を解決するための手段】
請求項1の発明の線材成形装置は、線材を挿通する線材ガイドと、線材を上下に挟んで送り出す少なくとも1対の送り出しローラと、前記線材ガイドより送り出された線材を衝合させてコイルに巻回する少なくとも1個の巻回工具と、該巻回工具で巻回されつつある線材の内側に接触する芯金工具と、該芯金工具と協働してコイルに成形された線材を切断する切断工具とを備えてなる線材成形装置において、断面矩形状の線材をコイル成形する場合に前記線材ガイド,上下の送り出しローラ,巻回工具,芯金工具,切断工具を当該線材の断面形状に対応して取り替えることにより、矩形断面の長辺をコイル成形軸線と直交するコイル成形と、矩形断面の長辺をコイル軸線と平行するコイル成形とに対応可能にするとともに、前記矩形断面の長辺がコイル軸線と直交するコイル成形の場合は、前記線材ガイドは線材挿通の矩形穴の上下面を短辺とし上下の送り出しローラとの干渉をさける円弧切欠きを設け、前記芯金工具は半円柱の弦部上稜線を受けとし、半円柱基部の半円柱軸線に対する直角断面と半円柱の弦部を含む面とでなる交線を少なくとも切刃に形成し、前記切断工具の切刃は前記芯金工具の切刃に傾斜するようになしたものである。
【0009】
この請求項1の発明によれば、断面矩形状の線材のコイル成形において、線材の矩形断面の長辺がコイル軸線と直交する場合、平行する場合、工具部材のみの交換によって容易に対応でき、市販の従来のコイルばね成形機を改造することなく容易に対応可能である。
【0011】
さらに、線材の矩形断面の長辺がコイル軸線と直交するコイル成形において、上下の送り出しローラを含め、線材断面の四辺が連続した線材ガイドによって案内されてガードされているので、薄い矩形材でも挟持圧力によって上下に潰される変形は起こらず、送り出しローラによって強制的に送り出しされる線材の送り方向に潰される座屈をも防止できる。また芯金工具の半円柱の弦部の上稜線を受けとし、半円柱基部の半円柱軸線に対する直角断面と弦面との上下方向の交線を矩形材長辺と平行する切刃に形成し、切断工具はこの切刃に斜めの切刃となしたことによって、切断時に剪断分力により線材の矩形の長辺が切刃側に圧接されながら半円柱の弦上稜の受けで確実に止められ、引き切り状態で矩形材の上から下方へ順に剪断されるため切断時の線材の座屈が防止される。
【0013】
また請求項の発明は、前記線材ガイドは前記上下の送り出しローラの挟持部位またはその近傍で分断されたものである。
この請求項の発明によれば、線材ガイドが線材の挟持圧力および強制送り出しに対して座屈が起こらない程度の分断とすることにより、小さい矩形穴を穿設した線材ガイドの製作、或いは矩形材の入る溝を削設して蓋をすることにより矩形穴を形成することができて線材ガイドの製作が容易となる。
【0014】
また請求項の発明は、前記上下の送り出しローラ外周面は矩形材幅の案内溝で線材を案内するものである。
この請求項の発明によれば、上下の送り出しローラの外周に矩形幅の円周溝すなわち上下の長辺側を挟持する場合は長辺幅の浅溝、上下の短辺側を挟持する場合は短辺幅の浅溝を削設しておくものであるので、矩形材の一部が溝に係合して左右への移動が規定されるので線材を安定且つ確実に送り出すことができる。
【0015】
また請求項の発明は、前記巻回工具は工具柄に枢支されたローラの外周に矩形材の幅の溝を外円周に形成したものである。
この請求項の発明によれば、巻回工具の巻回成形面に矩形材を案内しながら巻回する溝をローラに形成したので、ローラが巻回時に回転することにより巻回成形面の摩耗が少なく工具寿命が長くなる。線材の矩形断面の長辺がコイル軸線と直交する場合は短辺幅の深溝であり、長辺がコイル軸線に平行するときは長辺幅の浅溝である。また線材が溝に案内されるので巻回部分の線材軸線が蛇行することなく一定であり、ピッチを付与するときのピッチ誤差が安定する。
【0016】
また請求項の発明は、前記巻回工具は工具先端に矩形断面の線材を衝合させる溝を形成して線材を案内するものである。
この請求項の発明によれば、工具先端に矩形材の短辺幅の深溝、若しくは長辺幅の浅溝が形成されているので、巻回部分の線材軸線が蛇行することなく一定であり、ピッチを付与するときのピッチ誤差が安定する。
【0017】
【発明の実施の形態】
本発明の送り出し機構と巻回工具並びに芯金工具,切断工具関連を示す正面図の図1、図1の送り出しローラの中心位置のA−A線断面で示す図2、図2の送り出しローラによる矩形線材の挟持部の拡大図を示す図3、線材ガイド,巻回工具,芯金工具の拡大図にもとづき線材成形装置を説明する。
【0018】
本発明を実施する線材を巻回するコイルばね成形装置の基本構成は公知の装置と同じ構成であるので特に説明をしない。
本発明の特徴は成形素材に矩形材を用いてコイルばねの巻回を行う場合の線材ガイドと送り出しローラ,巻回工具および巻回されたコイルばねを切断する切断工具と芯金工具の形状にある。以下詳細に説明する。
先ず線材の矩形断面の長辺が巻回軸線(コイル軸線)と直交するコイル成形において、線材送り出し部,コイル成形部の機構を説明する。
【0019】
フープに巻かれた断面矩形の線材の歪みを矯正する図示しない矯正機の後に配置された送り出しローラは、本機基板の前面に取り付けられたブラケット1に、線材送り出しラインの上位置で、後端を直接、前端を間接に保持された軸受2A,2Aで回転可能に支軸3Aが軸承されており、ライン下の対称位置で平行にブラケット1に前端・後端を直接保持された軸受2B,2Bで回転可能に支軸3Bが軸承されている。この支軸3A,3Bの前端に装着され外周が平らである送り出しローラ4A,4Bが,支軸3A,3Bのそれぞれのフランジ3Aa,3Baに軸方向に植設したピン6A,6Bでそれぞれ回り止めされている。
【0020】
そして押さえ板7A,7Bを介してそれぞれの送り出しローラ4A、4Bは、締付ねじ8A,8Bでフランジ3Aa,3Baに圧着して同心に着座されている。この送り出しローラ4A,4Bの間は、矩形材Wの長辺長さに等しい距離の隙間が形成されるように送り出しローラの直径が作られている。そしてこの隙間に矩形断面の線材が通過する貫通穴を穿設した線材ガイド9が介在されている。線材ガイド9は身のほうに溝を削設して蓋を一体に固定することで貫通穴を形成できる。線材ガイド9の矩形断面の穴9aは線材の矩形断面と同じ形状・大きさで線材が案内されて滑らかに通過する大きさであり、長辺を側面、短辺を上・下面とする縦長の穴である。この線材ガイド9は、送り出しローラ4A,4Bの入口側と出口側で、押さえ蓋12と取付板11を介してボルトによってブラケット1に締着されている。この線材ガイド9は上下の送り出しローラ4A,4Bと干渉しないように上下面を送り出しローラ4A,4Bの径より僅かに大きな円弧9bで切欠されていて、上下の最小幅を矩形材の長辺寸法より僅かに小さくして上下の短辺部が露出するように作られている。なお、線材ガイド9は連続して一本或いは送り出しローラ4A,4Bの部位で分断したものとしてもよい。
【0021】
また支軸3A,3Bの後端のブラケット1に直接軸承された側には互いに噛合する同歯数の小歯車13A,13Bがそれぞれキー着されており、この小歯車13Aが図示しない中間歯車を介して制御装置で駆動制御され、送り出しローラ4A,4Bが互いに逆方向に回転されることにより線材Wを強制的に送り出すものである。
支軸3Aの後側の軸受2Aは、外輪外面2Aaが球面に形成されていて、この球面2Aaを受ける球座面15aをもつハウジング15を介してブラケット1に直接保持されている。
支軸3Aの前側の軸受2Aは、ブラケット1に削設した上下方向に長い貫通穴内で移動可能な軸受ハウジング14に保持されている。またブラケット1の上部の水平段1aにボルトにより着脱自在に固定されたシリンダ受板16に油圧シリンダ装置17が設立されていて、そのピストンロッド18の下端のT形頭部18aが、軸受ハウジング14の上部に貫通切り欠いたT溝19aに係脱自在に係合されている。
【0022】
したがって油圧シリンダ17の上室に所定の圧油が供給されることにより、ピストンロッド18,軸受ハウジング14を介して、支軸3Aが下圧されると、支軸3Aは軸受2Aの球面を中心として傾斜可能であるため、こじることなく下圧力に順応して支軸3A端の送り出しローラ4Aに下圧力を作用させる。そして位置固定の送り出しローラ4Bとで矩形の線材を上下より所定圧で挟持する。線材は側面の長辺側が線材ガイド9の穴9a内面で案内されているので、挟持力によって押し潰され座屈することが防止される。
【0023】
前述した上下の送り出しローラ4A,4B、加圧機構の流体圧シリンダ装置17、線材ガイド9は全く同じ機構が、本例では2組並列して設けられており、他の一組は同部品に同符号を付して表示した。したがって線材ガイド9は2組の送り出しローラにわたる長い連結したものとなり、送り出し側はブラケット1より突出して後述の巻回工具前面まで延在して取り替え可能に締着されている。
【0024】
巻回工具を図4にもとづき説明する。
線材ガイド9の前面には下斜めより、巻回されるコイルのほぼ中心に向かって図示しない進退駆動装置で、所望のコイル径が巻回される位置迄制御前進される第1巻回工具21が設けられている。さらにその上部に上斜めより巻回されるコイルのほぼ中心に向かって図示しない進退駆動装置で、所望のコイル径が巻回される位置まで制御前進される同形の第2巻回工具22が設けられている。
これらの巻回工具21,22の巻回成形面は図4bに示すようにそれぞれ矩形断面の短辺(厚み)が通過する幅で、矩形断面の長辺長さにほぼ等しい深さの深溝21a,22aを前端面から削設されているものである。
【0025】
切断工具と芯金工具について図5,図6にもとづき説明する。
芯金工具23は、上下方向に長い直方体の前端面の上下中央位置に半円の弦側23aを、線材ガイド9の前端面とほぼ同一面上位置に位置させた直方体の側面と同一面とする半円柱23bを突設して、巻回するコイル径に対応して上下に位置調整可能に設けられている。そして半円柱23bの弦側23a面の上端稜線23cを線材の受けとし、直方体の半円柱23bの基部で半円柱軸線に直角な断面23dと弦部を含む平面とでなる上下方向の交線を切刃とする。
【0026】
切断工具24は角柱でコイル成形方向と反対側の裏面下端を楔状に斜面24aを形成し、その側面芯金工具側の稜線を切刃24bとする。切断工具24は切刃24bを芯金工具23の弦側23aの面上に位置して且つ図示しない駆動装置で上下に進退可能に設けられている。
【0027】
次に本構成になる線材成形装置でコイルばねの成形加工を説明する。
フープに巻かれた断面矩形の線材は歪みが矯正されたあと線材ガイド9の矩形穴9aに挿通され、線材ガイド9の上下の切欠きで露出した短辺の上下面は、所定圧の油圧で作動された油圧シリンダ装置17で下方に押された上送り出しローラ4Aと固定の下送り出しローラ4Bとで所定圧で挟持される。線材Wは線材ガイド9で遊びなく上下・両横を囲んで案内ガードされているため、挟持による線材の潰れはなく座屈は起こらない。第1段の送り出しローラ4A,4Bで送られた線材Wは同速又は僅かに早くした第2段の送り出しローラ4A,4Bにより更に強制的に送り出され、二重送り出しにより、線材Wは滑りを起こすことなく確実に送り出されて最終的に所定のコイルばねに必要な送り量が送り出される。
【0028】
線材ガイド9の前端より送り出された線材Wはガイド前面に前進進出している第1巻回工具21の巻回溝21aに衝合して上方僅か手前側に湾曲される〔図4、図5,図6〕。湾曲された線材Wは更に第2巻回工具22の巻回溝22aに衝合してコイル軸線に対して矩形断面の長辺が直交する円弧を形成し芯金工具23の半円柱の弦面上面の稜線23cの受けに外接する円が成形される。第1巻回工具21,第2巻回工具22の巻回溝21a、22aの中心を順次線材ガイド9の穴中心より僅かにコイル成形方向へずらすか、または順次巻回溝21aを捻ることにより、巻回されたコイルに所定のピッチが形成される〔図4,図5,図6b〕。
【0029】
コイルの巻回数が所定回数に達し所定長のコイルが形成された時点で、送り出しローラ4A,4Bの回転が停止され、線材Wの送り出しを中断する。切断工具24が下降され斜面24aの切刃24bで、線材Wは下方に押され半円柱23aの稜線23cで受けられるとともに、その矩形の長辺側が分力により芯金工具23の上下方向の切刃23dに圧接される。切断工具24の引き続く下降で切断工具の切刃24bと芯金工具23の切刃23dにより、矩形断面の線材Wは上部から斜めに剪断され、最終的に切刃23dによって切断が完了する。この切断作業中矩形断面の線材は稜線23cで受けられ切刃23dにより圧接されて確実に保持されるので潰れて座屈を起こすことなく、且つ引き切り形態による切断で綺麗に切り離されるものである。
【0030】
矩形の短辺側上下面を挟持するコイル成形で送り出しローラ4A,4Bの他の実施例を図7にもとづき説明する。
送り出しローラ4A,4Bのそれぞれの外周に線材の矩形断面短辺が上下面である上端部,下端部の一部が係合する短辺幅の浅い凹溝4Aa,4Baがそれぞれ円周溝として形成されたものである。これに伴い線材送りガイド9の切欠き円弧はローラとの干渉をさけるため更に少し深いものとなる。この形式は線材とローラとの摩擦力が増大するので上送り出しローラに作用させる押圧力を下げることができる。また線材の両横が溝に係合するので安定した送り出しとなる。
【0031】
また巻回工具の21,22の他の実施例を図8にもとづき説明する。
この巻回工具は巻回ローラ27,29とこれをピン30で枢支するそれぞれ二股状の工具柄26,28とでなるものである。
そして巻回ローラ27,29の外周には線材の矩形断面の短辺幅の深溝の円周溝27a,29aを形成したものである。このものはローラの回転で線材の接触部位が移って行くので工具摩耗が少なくなる。なおこの巻回ローラ27は溝幅,深さを以後説明する線材成形の場合にも適応できる。
【0032】
次に線材Wの矩形断面の長辺がコイル軸線と平行するコイルばね成形の場合を図9,図10にもとづき説明する。
基本構成は同じであるので、変更となる部分のみを説明する。
【0033】
矩形穴の長辺を縦として取り付けた線材ガイド9を交換し、矩形穴31aの長辺が送り出しローラ4A,4B外周面と平行となる横向きに取り付けるものである。そして上下の送り出しローラ4A,4Bの挟持状態でローラと干渉しないように線ガイドを上下より切欠くと切断されることになり、線材ガイド31は分断形式となる。なお線材ガイド31の巻回工具側突出端は巻回コイルとの干渉をさける切欠き31bを削成しておくものである。
分断された線材ガイド31は送り出しローラの入口側と出口側でそれぞれ個別に固定される。また外周が平面の送り出しローラ4A,4Bは、矩形断面の長辺が上下面となったので長辺と短辺の差分だけ送り出しローラの直径をそれぞれ大きくなしたものと取り替えるものである。これによって前述と同じように線材の所定の挟持力が得られる。
【0034】
第1,第2巻回工具32,33は図10aのように、巻回成形面が深溝に形成されたものから長辺幅の広幅でほぼ短辺長さの浅溝32a,33aに形成されたものへと取り替えるものである。
切断工具36および芯金工具34は図10のように取り替えられる。即ち芯金工具34は半円形筒で弦側の上端稜線の切刃34aを線材ガイド31の前端面とほぼ一致するように取り付ける。切断工具36は傾斜面のない角筒で下端面の稜線の切刃36aを芯金工具34の切刃34a上に位置するように取り替えるものであって、通常一般の芯金工具,切断工具と同じ形状である。これらの部品のみ交替することで本発明は矩形長辺側がコイル軸線と平行するコイルばねのコイル成形が可能となる。
【0035】
即ち線材ガイド31の挿通穴31aに挿通された断面矩形の線材Wは、回転され且つ油圧シリンダ17で加圧された上の送り出しローラ4A,固定位置の送り出しローラ4Bとで上下面が矩形断面の長辺である2面で挟持されて、線材ガイド31前端より送り出される。線材Wは巻回位置に前進された第1巻回工具32の巻回溝32aに衝合して僅か手前側に湾曲され第2巻回工具33の巻回溝33aで円弧とされたあと半円柱の芯金工具34に外接して、コイルが連続して手前側に成形される。所定回数巻回される所定のコイル長となると線材送り出しが停止され切断工具36が下降して芯金工具34の切刃34aと切刃36aとで剪断されコイルが線材より分離される。
【0036】
【発明の効果】
本発明は上述のように構成したので以下の効果を奏する。
請求項1の発明は、矩形材のコイル成形に際して長辺側がコイル成形軸線と直交する場合と、平行する場合とにおいて、線材ガイド,送り出しローラ,巻回工具,芯金工具,切断工具を取り替えるのみによってどちらにも簡単に対応できるので、市販されている一般的なばね成形機を特に改造することなく簡単に対応できるのである。取り替え工具部材も消耗品に属するものであるので特にコストを上昇させることなく実施できる。
【0037】
さらに、矩形断面の線材を縦にして上・下面を短辺面として送るに際し、線材の周囲四辺が案内され完全にガードされるので、送り出しローラの加圧に伴う矩形材の上下が潰され線材の座屈の発生が防止される。また送り出しローラの回転で線材が強制的に送られるときに矩形材が送り方向に潰される座屈が防止される。またコイルの切断に際して芯金工具の半円柱の弦側の上稜線の受けで線材を受け、切断工具は斜めの切刃で半円柱基部に直角な上下方向の切刃に線材を剪断分力で圧接しながら上から下へ引き切り手法で剪断するので線材の切断による潰れが防止され座屈を起こすことなくきれいに切断される。
【0039】
請求項の発明は、線材ガイドが分断されているので蓋と身を分割して溝を形成することにより容易に矩形穴の線材ガイドがつくれる。また取り付けが容易である。
【0040】
請求項の発明は、送り出しローラの加圧面が溝で形成されているため、矩形材の上下の部分で左右に係合するので線材の送りが一層安定且つ確実なものとなる。
【0041】
請求項の発明は、巻回工具の巻回溝をローラに削設して線材と巻回溝との摩擦を減少させたので工具の消耗が少なく、且つ工具と線材との発熱を抑えることができる。
【0042】
請求項の発明は、工具先端の溝内で線材が巻回されるので安定したコイルの巻回がでる。
【図面の簡単な説明】
【図1】本発明の線材送り出しローラ,線材ガイド,巻回工具,芯金工具の関連正面図である。
【図2】図1の送り出しローラ中心位置のA−A線断面図である。
【図3】送り出しローラと線材ガイドの拡大図で、aは正面図、bは一部を断面とした側面図である。
【図4】線材ガイド,巻回工具,芯金工具の拡大配置図で、aは正面図、bはaのB−B線断面図である。
【図5】断面矩形状の線材の長辺側をコイル軸線と直交する方向に巻回している状態を示す図で、aは平面図、bは正面図である。
【図6】図5の成形状態の拡大経過図で、aは巻回始め半巻きの正面図、bはaのC−C線断面図で、3巻回した図、cはbにおいて切断工具により線材を切断する状態の断面図である。
【図7】送り出しローラの他の実施例を示す図で、aは正面図、bはローラの一部を断面で示した図である。
【図8】巻回工具の他の実施例で、aは正面図、bはaのD−D線断面図である。
【図9】断面矩形状の線材の長辺側をコイル軸線と平行する方向に巻回している状態を示す図で、aは平面図、bは正面図である。
【図10】図9の成形状態の拡大経過図で、aは巻回始めの半巻きの正面図、bはaのE−E線断面図で3巻きした図、cはbにおいて切断工具により線材を切断する状態の断面図である。
【図11】従来技術Bのコイル成形状態を示す図で、aは平面図、bは正面図である。
【符号の説明】
4A,4B 送り出しローラ
9,31 線材ガイド
9a,31a 矩形穴
17 油圧シリンダ装置
21,22,32,33 巻回工具
23,34 芯金工具
24,36 切断工具
23d,24b,34a,36a 切刃
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wire forming apparatus for winding a wire, and in particular, when a coil is formed from a spring material whose wire has a rectangular cross section, the long side direction of the rectangular cross section is parallel to the coil forming axial direction. Alternatively, the present invention relates to a wire forming apparatus that performs winding in which the long side directions are orthogonal.
[0002]
[Prior art]
As a wire feeding device in a wire forming device such as a coil spring forming device, for example, a feeding device disclosed in Japanese Patent Laid-Open No. 10-156469 has been conventionally used as a device for feeding a wire from a wire guide by at least one pair of feed rollers. Known (hereinafter referred to as Prior Art A). Further, a feeding device disclosed in Japanese Patent Publication No. Sho 52-40633 is conventionally known as a device for feeding a deformed material from a material guide (hereinafter referred to as Conventional Technology B).
[0003]
In addition, as a wire cutting device in a wire forming apparatus such as a coil spring forming apparatus, the cutting edge surface of a semicircular core bar with which the inner periphery of a coiled coil spring abuts as in the prior art A described above. A method of cutting a coil spring end by a shearing action between a cutting blade formed at the upper end and a cutting blade formed at the tip of a cutting tool that can be advanced and retracted is shown.
[0004]
[Problems to be solved by the invention]
A rectangular material in which the ratio of the short side to the long side of the cross-sectional shape is several times larger is sandwiched between at least one pair of delivery rollers in the vertical direction, and the delivery roller and the rectangular material are rotated according to the rotation of the pair of delivery rollers. When the rectangular material is forcibly transferred by the frictional force and sent out to the rectangular material processing region through the hole of the wire guide, in the case of the prior art A, winding is performed by each axis of the pair of upper and lower feed rollers and a winding tool. Since the coil axis to be rotated is parallel, when winding a rectangular coil in which the coil forming axis direction is parallel to the long side direction of the rectangular cross section of the wire, the pair of delivery rollers has a long side. Since the rectangular material may be sent while being sandwiched from above and below, the rectangular material can be sent without buckling. However, when winding a coil of a rectangular material in which the coil axis direction and the long side direction of the rectangular cross section of the wire are orthogonal, the feeding roller must feed the rectangular material with the short side sandwiched from above and below, so the rectangular material is There is a problem that the long side is buckled by the clamping force of the pair of feeding rollers, or when the rectangular material is forcibly fed according to the rotation of the pair of feeding rollers, the rectangular material is crushed and buckled in this direction. there were.
[0005]
In the case of the prior art B, as shown in FIG. 11, the axes of the pair of delivery rollers 101 and 101 and the coil axes wound by the winding tools 103A and 103B are perpendicular to each other. That is, when winding a coil whose cross-sectional shape of the wire is rectangular, when a coil of a rectangular material in which the coil forming axis direction and the long-side direction of the rectangular cross-section of the wire are orthogonal is wound, a pair of delivery Since the rollers 101 and 101 feed the rectangular material while holding the opposing long sides from above and below, the rectangular material can be fed without buckling deformation. However, when winding a coil of a rectangular material in which the coil forming axis direction is parallel to the long side direction of the rectangular cross section of the wire material, the delivery rollers 101 and 101 must feed the rectangular material with the short side sandwiched from above and below. Therefore, there has been a problem that the rectangular material is buckled by the pressure of the feeding roller, or buckled at this portion when the feeding roller forcibly feeds the rectangular material.
[0006]
Further, as a wire cutting device in a wire forming apparatus, the prior art A will be described by inserting a cut portion in FIG. 11B showing the prior art B. When the cutting tool 104 is sheared in the rectangular long side direction in cooperation with the cutting blade of the cored bar tool 105 at a position located on the cutting edge of the tool 105, it is cut straight from the long side direction of the rectangular material. Therefore, there was a problem that the rectangular material buckled and could not be cut cleanly.
[0007]
The present invention has been made to solve the above-mentioned problems of the prior art, and the object of the present invention is to provide a simple and easy way to replace only the tool member for each wire to be used. An object of the present invention is to provide a wire rod forming apparatus that can be adapted to both the case where the coil axis and the long side of the rectangular material are orthogonal and parallel, and that can be implemented without special modification to a machine such as the prior art A. Is.
[0008]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a wire rod forming apparatus comprising: a wire rod guide for inserting a wire rod; at least one pair of feed rollers that feed the wire rod up and down; and a wire rod fed from the wire rod guide, and wound on a coil. At least one winding tool that rotates, a core tool that contacts the inside of the wire being wound by the winding tool, and a wire formed in the coil in cooperation with the core tool In the wire rod forming device equipped with a cutting tool, when coil forming a wire with a rectangular cross section, the wire guide, the upper and lower feed rollers, the winding tool, the core tool, and the cutting tool correspond to the cross sectional shape of the wire by then replaced by a coil forming orthogonal to long sides of the rectangular cross-section with the coil molding axis, while allowing the corresponding long sides of the rectangular cross-section in the coil forming parallel to the coil axis, the length of the rectangular cross-section In the case of coil forming orthogonal to the coil axis, the wire guide is provided with an arc notch that prevents the upper and lower surfaces of the rectangular hole for inserting the wire from short sides and avoids interference with the upper and lower feed rollers, and the core bar tool is a semi-cylinder. The cutting edge of the cutting tool is formed with at least an intersecting line formed by a cross-section perpendicular to the semi-cylindrical axis of the semi-cylindrical base and a surface including the chord portion of the semi-cylindrical base. Inclined to the cutting edge of the gold tool .
[0009]
According to the invention of claim 1, in coil forming of a wire having a rectangular cross section, when the long side of the rectangular cross section of the wire is orthogonal to the coil axis, it can be easily handled by replacing only the tool member, This can be easily handled without modifying a commercially available conventional coil spring forming machine.
[0011]
Furthermore, in coil forming where the long side of the rectangular cross section of the wire is orthogonal to the coil axis , the four sides of the wire cross section, including the upper and lower feed rollers, are guided and guarded by a continuous wire guide, so even thin rectangular materials can be sandwiched The deformation that is crushed up and down by the pressure does not occur, and the buckling that is crushed in the feeding direction of the wire that is forcibly fed by the feeding roller can also be prevented. In addition, the upper edge line of the chord part of the half cylinder of the core bar tool is received, and the crossing line perpendicular to the half cylinder axis of the half cylinder base and the chord surface is formed on the cutting edge parallel to the long side of the rectangular material. The cutting tool is a slanted cutting edge, so that when cutting, the rectangular long side of the wire is pressed against the cutting edge by the shear component, and it is securely stopped at the receiving edge of the semi-cylindrical chord. In addition, since the wire is sheared sequentially from the top to the bottom in the drawn state, buckling of the wire during cutting is prevented.
[0013]
According to a second aspect of the present invention, the wire guide is divided at or near the clamping portion of the upper and lower feed rollers.
According to the second aspect of the present invention, the wire guide is divided so that buckling does not occur with respect to the pinching pressure and forced feeding of the wire, thereby producing a wire guide having a small rectangular hole or a rectangular shape. A rectangular hole can be formed by cutting the groove into which the material enters and covering it, making it easier to manufacture the wire guide.
[0014]
According to a third aspect of the present invention, the outer peripheral surface of the upper and lower feed rollers guides the wire with a guide groove having a rectangular material width.
According to the third aspect of the present invention, when sandwiching a circumferential groove having a rectangular width on the outer periphery of the upper and lower delivery rollers, that is, when the upper and lower long sides are sandwiched, the long groove is shallow and the upper and lower short sides are sandwiched. Since a shallow groove with a short side width is cut off, a part of the rectangular material is engaged with the groove and the lateral movement is regulated, so that the wire can be sent out stably and reliably.
[0015]
According to a fourth aspect of the present invention, the winding tool is formed by forming a groove having a width of a rectangular material on the outer circumference of a roller pivotally supported by a tool handle.
According to the fourth aspect of the present invention, the groove for winding while guiding the rectangular material on the winding forming surface of the winding tool is formed on the roller. Less wear and longer tool life. When the long side of the rectangular cross section of the wire is orthogonal to the coil axis, it is a deep groove with a short side width, and when the long side is parallel to the coil axis, it is a shallow groove with a long side width. Further, since the wire is guided in the groove, the wire axis of the winding portion is constant without meandering, and the pitch error when the pitch is applied is stabilized.
[0016]
According to a fifth aspect of the present invention, the winding tool guides the wire by forming a groove for abutting the wire having a rectangular cross section at the tip of the tool.
According to the fifth aspect of the present invention, since the short-sided deep groove or the long-sided shallow groove of the rectangular material is formed at the tool tip, the wire axis of the winding portion is constant without meandering. The pitch error when applying the pitch is stabilized.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 of the front view showing the feed mechanism, winding tool, cored tool, and cutting tool related to the present invention, FIG. 2 showing the center position of the feed roller of FIG. 1, and FIG. The wire rod forming apparatus will be described on the basis of FIG. 3 showing an enlarged view of the sandwiching portion of the rectangular wire rod, and enlarged views of the wire rod guide, the winding tool, and the core bar tool.
[0018]
The basic configuration of the coil spring forming apparatus for winding the wire material embodying the present invention is the same as that of a known apparatus, and therefore will not be particularly described.
The feature of the present invention is the shape of a wire rod guide, a feed roller, a winding tool, a cutting tool for cutting the wound coil spring, and a core bar tool when a coil spring is wound using a rectangular material as a molding material. is there. This will be described in detail below.
First, in the coil forming in which the long side of the rectangular cross section of the wire is orthogonal to the winding axis (coil axis), the mechanism of the wire feeding part and the coil forming part will be described.
[0019]
A feeding roller disposed after a straightening machine (not shown) that corrects the distortion of the wire having a rectangular cross section wound around the hoop is placed at the rear end of the wire feeding line on the bracket 1 attached to the front surface of the machine board. The bearing shaft 3A is rotatably supported by the bearings 2A and 2A in which the front ends are indirectly held, and the front and rear ends are directly held by the bracket 1 in parallel at symmetrical positions below the line. A support shaft 3B is supported so as to be rotatable at 2B. The feed rollers 4A and 4B, which are mounted on the front ends of the support shafts 3A and 3B and have a flat outer periphery, are prevented from rotating by pins 6A and 6B axially implanted in the flanges 3Aa and 3Ba of the support shafts 3A and 3B, respectively. Has been.
[0020]
The delivery rollers 4A and 4B are seated concentrically by pressing the flanges 3Aa and 3Ba with the fastening screws 8A and 8B via the pressing plates 7A and 7B. The diameter of the feed roller is made so that a gap having a distance equal to the long side length of the rectangular material W is formed between the feed rollers 4A and 4B. A wire guide 9 having a through hole through which a wire having a rectangular cross section passes is interposed in the gap. The wire guide 9 can form a through hole by cutting a groove in the body and fixing the lid integrally. The hole 9a having a rectangular cross-section of the wire guide 9 has a shape and size that is the same as the rectangular cross-section of the wire, and is a size that allows the wire to pass smoothly and has a long side as a side and a short side as an upper / lower surface. Is a hole. The wire guide 9 is fastened to the bracket 1 by bolts via a pressing lid 12 and a mounting plate 11 on the inlet side and the outlet side of the feed rollers 4A and 4B. The wire guide 9 has its upper and lower surfaces cut away by an arc 9b slightly larger than the diameter of the feed rollers 4A and 4B so as not to interfere with the upper and lower feed rollers 4A and 4B. It is made slightly smaller so that the upper and lower short sides are exposed. In addition, the wire guide 9 is good also as what was divided | segmented by the site | part of the one or delivery roller 4A, 4B continuously.
[0021]
Small gears 13A and 13B having the same number of teeth meshing with each other are keyed on the side directly supported by the bracket 1 at the rear end of the support shafts 3A and 3B. The small gear 13A is an intermediate gear (not shown). The feed roller 4A, 4B is forcibly fed out by rotating the feed rollers 4A, 4B in opposite directions.
The outer bearing 2A on the rear side of the support shaft 3A has a spherical outer surface 2Aa, and is directly held by the bracket 1 via a housing 15 having a spherical seat surface 15a for receiving the spherical surface 2Aa.
The bearing 2 </ b> A on the front side of the support shaft 3 </ b> A is held by a bearing housing 14 that is movable in a through hole that is cut in the bracket 1 and that is long in the vertical direction. Further, a hydraulic cylinder device 17 is established on a cylinder receiving plate 16 that is detachably fixed to a horizontal step 1 a of the upper portion of the bracket 1 by a bolt, and a T-shaped head portion 18 a at the lower end of the piston rod 18 is connected to the bearing housing 14. Is engaged with a T-groove 19a cut through the upper portion of the upper part of the upper part of the upper part of the upper part of the upper part of the upper part of the upper part of the upper part of the part.
[0022]
Therefore, when a predetermined pressure oil is supplied to the upper chamber of the hydraulic cylinder 17 and the support shaft 3A is reduced in pressure via the piston rod 18 and the bearing housing 14, the support shaft 3A is centered on the spherical surface of the bearing 2A. Therefore, the lower pressure is applied to the feed roller 4A at the end of the support shaft 3A without adapting to the lower pressure. Then, the rectangular wire is clamped at a predetermined pressure from above and below by the feed roller 4B having a fixed position. Since the long side of the side of the wire is guided by the inner surface of the hole 9a of the wire guide 9, it is prevented from being crushed and buckled by the clamping force.
[0023]
The above-described upper and lower delivery rollers 4A, 4B, the fluid pressure cylinder device 17 of the pressurizing mechanism, and the wire guide 9 have the same mechanism, but in this example, two sets are provided in parallel, and the other set is the same component. The same symbols are attached and displayed. Accordingly, the wire guide 9 is a long link extending over two sets of feed rollers, and the feed side protrudes from the bracket 1 and extends to the front surface of a winding tool described later, and is fastened so as to be replaceable.
[0024]
The winding tool will be described with reference to FIG.
A first winding tool 21 which is controlled and advanced to a position where a desired coil diameter is wound by an advancing / retreating drive device (not shown) toward the substantially center of the coil to be wound on the front surface of the wire guide 9 from obliquely downward. Is provided. In addition, a second winding tool 22 having the same shape is provided on the upper portion of the coil so as to be controlled and advanced to a position where a desired coil diameter is wound by an advancing / retreating drive device (not shown) toward a substantially center of a coil wound obliquely upward. It has been.
As shown in FIG. 4b, the winding forming surfaces of these winding tools 21 and 22 have a width through which the short side (thickness) of the rectangular cross section passes, and a deep groove 21a having a depth substantially equal to the long side length of the rectangular cross section. 22a are cut from the front end face.
[0025]
The cutting tool and the core bar tool will be described with reference to FIGS.
The mandrel tool 23 has the same surface as the side surface of the rectangular parallelepiped where the semicircular chord side 23a is positioned substantially on the same end as the front end surface of the wire guide 9 at the vertical center position of the front end surface of the rectangular parallelepiped long in the vertical direction. A semi-cylindrical tube 23b is provided so as to be vertically adjustable in correspondence with the diameter of the coil to be wound. Then, the upper edge ridge line 23c of the chord side 23a surface of the semi-cylinder 23b is used as a wire rod receiver, and a vertical cross line formed by a cross-section 23d perpendicular to the semi-cylinder axis at the base of the cuboid half cylinder 23b and a plane including the chord part A cutting blade.
[0026]
The cutting tool 24 is a prism and forms a slope 24a in a wedge shape at the lower end on the opposite side of the coil forming direction, and the ridge line on the side metal bar tool side is a cutting edge 24b. The cutting tool 24 is provided such that the cutting edge 24b is positioned on the surface of the chord side 23a of the core bar tool 23 and can be moved up and down by a driving device (not shown).
[0027]
Next, the forming process of the coil spring will be described with the wire rod forming apparatus having this configuration.
After the distortion is corrected, the wire rod having a rectangular cross section wound around the hoop is inserted into the rectangular hole 9a of the wire rod guide 9, and the upper and lower surfaces of the short sides exposed by the upper and lower cutouts of the wire rod guide 9 are oil pressure of a predetermined pressure. The upper feed roller 4A pushed downward by the actuated hydraulic cylinder device 17 and the fixed lower feed roller 4B are nipped at a predetermined pressure. Since the wire W is guarded by the wire guide 9 so as to surround the upper and lower sides and the sides without play, the wire rod is not crushed by pinching and buckling does not occur. The wire W sent by the first-stage feed rollers 4A and 4B is further forcibly fed by the second-stage feed rollers 4A and 4B that are the same speed or slightly faster, and the double-feeding causes the wire W to slip. It is surely sent out without being raised, and finally a feed amount necessary for a predetermined coil spring is sent out.
[0028]
The wire W fed from the front end of the wire guide 9 abuts on the winding groove 21a of the first winding tool 21 that has advanced forward to the front surface of the guide and is bent slightly upward in front (FIGS. 4 and 5). FIG. 6]. The curved wire W further collides with the winding groove 22a of the second winding tool 22 to form an arc whose long side of the rectangular cross section is orthogonal to the coil axis, and the chord surface of the semi-cylindrical surface of the core bar tool 23 A circle circumscribing the ridge line 23c on the upper surface is formed. By sequentially shifting the centers of the winding grooves 21a and 22a of the first winding tool 21 and the second winding tool 22 slightly from the hole center of the wire guide 9 in the coil forming direction, or by sequentially twisting the winding grooves 21a. A predetermined pitch is formed in the wound coil (FIGS. 4, 5 and 6b).
[0029]
When the number of coil turns reaches a predetermined number and a coil having a predetermined length is formed, the rotation of the delivery rollers 4A and 4B is stopped, and the delivery of the wire W is interrupted. The cutting tool 24 is lowered and the wire W is pushed downward by the cutting edge 24b of the inclined surface 24a and received by the ridge line 23c of the semi-cylinder 23a, and the long side of the rectangle is cut in the vertical direction by the component force. It is pressed against the blade 23d. As the cutting tool 24 continues to descend, the cutting member 24b of the cutting tool and the cutting blade 23d of the core metal tool 23 shear the diagonal cross section of the wire W obliquely from above, and the cutting is finally completed by the cutting blade 23d. During this cutting operation, the wire having a rectangular cross-section is received by the ridge line 23c and pressed and securely held by the cutting edge 23d, so that it does not collapse and buckle, and can be cut cleanly by cutting according to the cutting form. .
[0030]
Another embodiment of the feed rollers 4A and 4B by coil forming that sandwiches the upper and lower surfaces of the rectangular short side will be described with reference to FIG.
On the outer periphery of each of the feed rollers 4A and 4B, a short concave groove 4Aa and 4Ba having a short side width engaged with the upper end portion and the lower end portion of the wire having a short rectangular cross-section are formed as circumferential grooves. It has been done. Accordingly, the notch arc of the wire feed guide 9 becomes a little deeper to avoid interference with the roller. In this type, since the frictional force between the wire rod and the roller increases, the pressing force applied to the upper feed roller can be reduced. Further, since both sides of the wire are engaged with the groove, stable feeding is achieved.
[0031]
Another embodiment of the winding tool 21, 22 will be described with reference to FIG.
The winding tool includes winding rollers 27 and 29 and bifurcated tool handles 26 and 28 that pivotally support the rollers 27 and 29, respectively.
In addition, circumferential grooves 27a and 29a, which are deep grooves having a short side width of a rectangular cross section of the wire rod, are formed on the outer periphery of the winding rollers 27 and 29. Since the contact portion of the wire moves with the rotation of the roller, tool wear is reduced. The winding roller 27 can also be applied to the case of wire rod forming whose groove width and depth will be described later.
[0032]
Next, the case of coil spring molding in which the long side of the rectangular cross section of the wire W is parallel to the coil axis will be described with reference to FIGS.
Since the basic configuration is the same, only the parts to be changed will be described.
[0033]
The wire guide 9 attached with the long side of the rectangular hole as vertical is replaced, and the long side of the rectangular hole 31a is attached in the horizontal direction so as to be parallel to the outer peripheral surfaces of the feed rollers 4A and 4B. When the wire guide is cut from above and below so as not to interfere with the rollers while the upper and lower feed rollers 4A and 4B are sandwiched, the wire guide 31 is cut. In addition, the winding tool side protrusion end of the wire guide 31 cuts out a notch 31b to avoid interference with the winding coil.
The divided wire guides 31 are individually fixed on the inlet side and the outlet side of the feed roller. Further, the delivery rollers 4A and 4B having a flat outer periphery are replaced with ones in which the diameter of the delivery roller is increased by the difference between the long side and the short side because the long sides of the rectangular cross section are the upper and lower surfaces. As a result, a predetermined holding force of the wire can be obtained as described above.
[0034]
As shown in FIG. 10a, the first and second winding tools 32 and 33 are formed in a shallow groove 32a and 33a having a long side width and a short side length from a winding forming surface formed in a deep groove. It is to replace it with something.
The cutting tool 36 and the core bar tool 34 are replaced as shown in FIG. That is, the core bar tool 34 is a semicircular cylinder and is attached so that the cutting edge 34 a of the upper end ridge line on the string side substantially coincides with the front end face of the wire guide 31. The cutting tool 36 is a square tube without an inclined surface, and replaces the cutting edge 36a of the ridge line on the lower end surface so as to be positioned on the cutting edge 34a of the core bar tool 34. It is the same shape. By replacing only these components, the present invention enables coil formation of a coil spring whose rectangular long side is parallel to the coil axis.
[0035]
That is, the rectangular wire W inserted in the insertion hole 31a of the wire guide 31 has a rectangular cross-section with the upper feed roller 4A rotated and pressurized by the hydraulic cylinder 17 and the feed roller 4B at the fixed position. It is sandwiched between two long sides and fed out from the front end of the wire guide 31. The wire W collides with the winding groove 32a of the first winding tool 32 advanced to the winding position and is bent slightly toward the front side to be arced by the winding groove 33a of the second winding tool 33. The coil is continuously formed on the front side by circumscribing the cylindrical core tool 34. When a predetermined coil length wound a predetermined number of times is reached, the feeding of the wire rod is stopped, the cutting tool 36 is lowered and sheared by the cutting blade 34a and the cutting blade 36a of the core bar tool 34, and the coil is separated from the wire rod.
[0036]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
The invention of claim 1 only replaces the wire guide, the feed roller, the winding tool, the core tool, and the cutting tool in the case where the long side is orthogonal to the coil forming axis in the coil forming of the rectangular material. Therefore, it is possible to easily cope with both of them without special modification of a commercially available general spring forming machine. Since the replacement tool member also belongs to the consumable item, the replacement tool member can be implemented without particularly increasing the cost.
[0037]
In addition , when feeding the wire with a rectangular cross section vertically and feeding the upper and lower surfaces as short sides, the four sides around the wire are guided and completely guarded, so the top and bottom of the rectangular material accompanying the pressurization of the feed roller is crushed and the wire The occurrence of buckling is prevented. Further, the buckling that the rectangular material is crushed in the feeding direction when the wire is forcibly fed by the rotation of the feeding roller is prevented. Also, when cutting the coil, the wire rod is received by the upper edge of the chord side of the half cylinder of the core bar tool. Since it is sheared by a drawing method from the top to the bottom while being pressed, the wire is prevented from being crushed by cutting and can be cut cleanly without causing buckling.
[0039]
In the invention of claim 2 , since the wire guide is divided, the wire guide with a rectangular hole can be easily formed by dividing the lid and the body to form a groove. It is easy to install.
[0040]
According to the third aspect of the present invention, since the pressure surface of the feed roller is formed by a groove, the wire rod is engaged left and right at the upper and lower portions of the rectangular material, so that the feeding of the wire becomes more stable and reliable.
[0041]
In the invention of claim 4 , the winding groove of the winding tool is cut on the roller to reduce the friction between the wire and the winding groove, so that the consumption of the tool is small and the heat generation between the tool and the wire is suppressed. Can do.
[0042]
The invention of claim 5, that Ki out stable coil wound so the wire in the groove of the tool tip is wound.
[Brief description of the drawings]
FIG. 1 is a related front view of a wire feed roller, a wire guide, a winding tool, and a core bar tool of the present invention.
FIG. 2 is a cross-sectional view taken along line AA at the center position of the feed roller in FIG.
FIG. 3 is an enlarged view of a feed roller and a wire guide, in which a is a front view and b is a side view with a part in cross section.
FIGS. 4A and 4B are enlarged layout views of a wire guide, a winding tool, and a mandrel tool, where a is a front view and b is a cross-sectional view taken along line BB of FIG.
FIGS. 5A and 5B are diagrams showing a state in which a long side of a wire having a rectangular cross section is wound in a direction orthogonal to the coil axis, wherein a is a plan view and b is a front view.
6 is an enlarged progress view of the molding state of FIG. 5, a is a front view of the first half of winding, b is a cross-sectional view taken along the line CC of a, three turns, c is a cutting tool in b It is sectional drawing of the state which cut | disconnects a wire.
FIGS. 7A and 7B are diagrams showing another embodiment of the feed roller, in which a is a front view and b is a view showing a part of the roller in section.
8 is a front view of a winding tool according to another embodiment, and FIG.
FIGS. 9A and 9B are diagrams showing a state in which a long side of a wire having a rectangular cross section is wound in a direction parallel to a coil axis, where a is a plan view and b is a front view.
FIG. 10 is an enlarged progress view of the molding state of FIG. 9, wherein a is a front view of a half winding at the beginning of winding, b is a cross-sectional view taken along line EE of a, and c is a cutting tool at b. It is sectional drawing of the state which cut | disconnects a wire.
FIGS. 11A and 11B are diagrams showing a coil forming state of the prior art B, where a is a plan view and b is a front view.
[Explanation of symbols]
4A, 4B Feed roller 9, 31 Wire rod guide 9a, 31a Rectangular hole 17 Hydraulic cylinder device 21, 22, 32, 33 Winding tool 23, 34 Core tool 24, 36 Cutting tool 23d, 24b, 34a, 36a Cutting blade

Claims (5)

線材を挿通する線材ガイドと、線材を上下に挟んで送り出す少なくとも1対の送り出しローラと、前記線材ガイドより送り出された線材を衝合させてコイルに巻回する少なくとも1個の巻回工具と、該巻回工具で巻回されつつある線材の内側に接触する芯金工具と、該芯金工具と協働してコイルに成形された線材を切断する切断工具とを備えてなる線材成形装置において、断面矩形状の線材をコイル成形する場合に前記線材ガイド,上下の送り出しローラ,巻回工具,芯金工具,切断工具を当該線材の断面形状に対応して取り替えることにより、矩形断面の長辺をコイル成形軸線と直交するコイル成形と、矩形断面の長辺をコイル軸線と平行するコイル成形とに対応可能にするとともに、前記矩形断面の長辺がコイル軸線と直交するコイル成形の場合は、前記線材ガイドは線材挿通の矩形穴の上下面を短辺とし上下の送り出しローラとの干渉をさける円弧切欠きを設け、前記芯金工具は半円柱の弦部上稜線を受けとし、半円柱基部の半円柱軸線に対する直角断面と半円柱の弦部を含む面とでなる交線を少なくとも切刃に形成し、前記切断工具の切刃は前記芯金工具の切刃に傾斜するようになしたことを特徴とする線材成形装置。A wire rod guide for inserting the wire rod, at least one pair of feed rollers that feed the wire rod up and down, at least one winding tool that abuts the wire rod fed from the wire rod guide and winds it around the coil, In a wire rod forming apparatus comprising: a core bar tool that contacts the inside of a wire rod being wound by the winding tool; and a cutting tool that cuts the wire rod formed into a coil in cooperation with the core bar tool When coiling a wire having a rectangular cross section, the long side of the rectangular cross section can be obtained by replacing the wire guide, the upper and lower feed rollers, the winding tool, the core metal tool, and the cutting tool in accordance with the cross sectional shape of the wire. a coil forming orthogonal to the coil molding axis and thereby enabling corresponding long sides of the rectangular cross-section coil forming and parallel to the coil axis, the coil formed of the long sides of the rectangular cross-section perpendicular to the coil axis In this case, the wire guide is provided with an arc notch to avoid interference with the upper and lower feed rollers with the upper and lower surfaces of the rectangular hole through which the wire is inserted short, and the core bar tool receives the upper ridge line of the chord part of the semi-cylinder. , An intersecting line formed by a cross section perpendicular to the semi-cylindrical axis of the semi-cylindrical base and a surface including the chord portion of the semi-cylindrical is formed on at least the cutting blade, and the cutting blade of the cutting tool is inclined to the cutting blade of the core metal tool wire forming apparatus being characterized in that no such. 前記線材ガイドは前記上下の送り出しローラの挟持部位またはその近傍で分断されたものである請求項に記載の線材成形装置。The wire rod forming apparatus according to claim 1 , wherein the wire rod guide is divided at a portion where the upper and lower feed rollers are sandwiched or in the vicinity thereof. 前記上下の送り出しローラ外周面は矩形材幅の案内溝で線材を案内するものである請求項1に記載の線材成形装置。2. The wire rod forming apparatus according to claim 1, wherein the outer peripheral surfaces of the upper and lower feed rollers guide the wire rod by a guide groove having a rectangular material width. 前記巻回工具は工具柄に枢支されたローラの外周に矩形材の幅の溝を外円周に形成したものである請求項1に記載の線材成形装置。2. The wire rod forming apparatus according to claim 1, wherein the winding tool is formed by forming a groove having a width of a rectangular material on an outer circumference of a roller pivotally supported by a tool handle. 前記巻回工具は工具先端に矩形断面の線材を衝合させる溝を形成して線材を案内するものである請求項1に記載の線材成形装置。2. The wire rod forming apparatus according to claim 1, wherein the winding tool is configured to guide a wire rod by forming a groove for abutting a wire having a rectangular cross section at the tip of the tool.
JP2000158057A 2000-05-29 2000-05-29 Wire forming equipment Expired - Fee Related JP3810987B2 (en)

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CN100496875C (en) * 2007-06-06 2009-06-10 上海核工碟形弹簧制造有限公司 Method for manufacturing wave shaped spring
CN104028684B (en) * 2014-07-02 2016-08-31 安庆谢德尔汽车零部件有限公司 A kind of rectangular wire spring Coil-up frock
CN104399844B (en) * 2014-12-26 2016-01-27 福建永动力弹簧科技有限公司 Rectangular Section Spring machine-shaping module
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