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JP3913644B2 - Wire feeder for spring forming machine - Google Patents
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JP3913644B2 - Wire feeder for spring forming machine - Google Patents

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JP3913644B2
JP3913644B2 JP2002250317A JP2002250317A JP3913644B2 JP 3913644 B2 JP3913644 B2 JP 3913644B2 JP 2002250317 A JP2002250317 A JP 2002250317A JP 2002250317 A JP2002250317 A JP 2002250317A JP 3913644 B2 JP3913644 B2 JP 3913644B2
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feed roller
shaft
wire
roller shaft
roller
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JP2004082198A (en
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栄次 大林
淳 今村
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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、線材をクイル前方のコイルばね成形空間へ送り出すばね成形機の線材送り装置に関するものである。
【0002】
【従来の技術】
従来の技術としては、例えば、図4に示すばね成形機の線材送り装置(以下、従来技術Aという)や、特開平7−32078号公報に開示された線材の予備加工方法及び予備加工装置に係る発明(以下、従来技術Bという)が知られている。 まず、従来技術Aにおいては図4に示すように、下ローラ軸113は下送りローラ111を止着して回動可能に機枠体115に支承され、上ローラ軸114は上送りローラ112を止着して回動可能に機枠体115に支承されている。
これらの下ローラ軸113と上ローラ軸114とは、軸方向に移動調整できない。
【0003】
このため、線材を挟持して送り出す下送りローラ111の案内溝111aの軸心と基準面との距離L101と、上送りローラ112の案内溝112aの軸心と基準面との距離L102とが、送り出される線材を前方に案内する図示しない線材案内筒の案内穴の軸心と基準面との距離L100に対して最大で加工公差分だけ偏心する。 この偏心量が線材径に対して大きくなるにしたがい、案内溝111a,112aから送り出される線材が、線材案内筒の案内穴の入口側面に強く押圧され、線材の外周に疵が発生する問題があった。
【0004】
これら案内溝111a,112aと、線材案内筒の案内穴との偏心の要因となる各部の加工公差には最小限度があるから、特に線材径が0.4mm以下の細い線材においては、線材径に対して加工公差による偏心の比率が高く、傷がつきやすい。 そして、前記偏心量を僅少にするためには、線材径が変わる段取り替えのたびに、上下送りローラ112,111の案内溝112a,111aの軸方向位置を下ローラ軸113,上ローラ軸114との間でライナー調整などにより芯出しする無駄時間を要す問題があった。
【0005】
また、密着コイルばねに安定した初張力を付与して巻回する場合には、下送りローラ111の案内溝111aの軸心と基準面との距離L101と、上送りローラ112の案内溝112aの軸心と基準面との距離L102とを設定量だけ異ならせ両案内溝の軸心を偏心させて、送り出す線材に曲げ応力を付加し一定方向の湾曲した流れを与えるとよいが、この従来技術Aの発明では、案内溝111a,112aを軸方向へ移動調整できないので、安定した初張力を付与することができないという問題があった。 このような従来技術Aの問題を解決するために改良されたものが、次の従来技術Bの発明である。
【0006】
この従来技術Bの発明は、図5に示すように、上ローラ軸214が回動自在にかつ摺動不能に連結された軸受部材216と、回転運動を軸受部材216の進退方向に沿う直線運動に変換するよう回転運動部217と直線運動部218で構成された変換機構を備えたものである。 そして、密着コイルばねに初張力を付与して巻回する場合には、前記軸受部材を回動させることで上ローラ軸214を軸方向に移動させ、下送りローラ211の案内溝に対して上送りローラ212の案内溝を設定量偏心させて送り出す線材に曲げ応力を付加し一定方向の湾曲した流れ(予備曲げ)を与え、巻回するコイルばねに安定した初張力を付与するようにしたものである。
【0007】
【発明が解決しようとする課題】
しかしながら、従来技術Bの発明は、上ローラ軸214のみが軸方向に移動調整可能であるから、下送りローラ211の案内溝は、線材案内筒の案内穴に対して位置調整ができない。 すなわち、従来技術Aの発明と同様に下送りローラ211の案内溝が、線材案内筒の案内穴に対して加工公差分だけ偏心した場合には、送り出される線材が線材案内筒の案内穴の入口側面に強く押圧されないように、下送りローラ211の案内溝の軸方向位置を下ローラ軸213との間でライナー調整などにより芯出しする無駄時間を要す問題があった。 なお、初張力を付与して巻回する場合に上送りローラ212の案内溝を偏心させる偏心量は、線材に疵をつけない範囲内において偏心させるものである。
【0008】
本発明は、このような問題点に鑑みてなされたものであって、その目的とするところは、送り出される線材が線材案内筒の案内穴の入口側面に強く押圧され線材の外周に疵が発生する問題、下送りローラまたは上送りローラの案内溝の軸方向位置を線材径が変わる段取り替えのときにライナー調整などにより芯出しする無駄時間を要す問題、上下送りローラの各案内溝を軸方向へ移動調整できないので安定した初張力を付与することができないという問題などを解決しようとするものである。
【0009】
【課題を解決するための手段】
上記課題を解決するために、本発明のうち請求項1に係る発明のばね成形機の線材送り装置は、線材をクイル前方のコイルばね成形空間へ送り出すばね成形機の線材送り装置であって、
線材の下半部を案内可能な案内溝が外周に形成された下送りローラと、この下送りローラを前端に止着して一体的に回動可能でかつ軸方向へ進退移動可能に支承され雄ねじが螺刻された下ローラ軸と、この下ローラ軸はコイルばねにより下送りローラ止着側へ常時付勢され前記雄ねじと螺合されたねじ筒が回動されることで前記下ローラ軸を前記コイルばねに抗して進退移動させる下軸調整機構と、
線材の上半部を案内可能な案内溝が外周に形成された上送りローラと、前記下送りローラと相互の外周が平行して近接する位置で前記上送りローラを前端に止着して一体的に回動可能で且つ軸方向へ進退移動可能に支承された上ローラ軸と、
この上ローラ軸の後端側を支承する軸受の軸受筒が前記上ローラ軸と同一軸心で機枠体に設けられた雌ねじに螺合され、前記軸受筒が回動されることで前記軸受を介して前記上ローラ軸を進退移動させる上軸調整機構を備えてなり、前記下送りローラ及び上送りローラのそれぞれの案内溝を軸方向に微調整可能としたものである。
【0010】
この請求項1の発明によれば、下ローラ軸を軸方向へ進退移動させて下送りローラの案内溝位置を軸方向に調整する下軸調整機構と、上ローラ軸を軸方向へ進退移動させて上送りローラの案内溝位置を軸方向に調整する上軸調整機構とを備えて、上下送りローラの各案内溝を軸方向へ移動調整することで、線材案内筒の案内穴に対する上下送りローラの各案内溝の偏心量を僅少にし、送り出される線材が線材案内筒の案内穴の入口側面に強く押圧されないようにして、線材の外周に疵を発生させずにコイルばねの成形加工ができる。
【0011】
また、下軸調整機構または上軸調整機構により、上下送りローラの各案内溝を軸方向へ移動調整できるのでライナー調整の必要がなく、巻回する線材径が変わる段取り替えの際などにおける、線材案内筒の案内穴に対する上下送りローラの各案内溝の芯出し時間を短縮できる。 さらに、下軸調整機構または上軸調整機構により、下送りローラと上送りローラとの各案内溝の相互の偏心量を調整することで、送り出す線材に曲げ応力を付加し一定方向の湾曲した流れ(予備曲げ)を与え、密着コイルばねに安定した初張力を付与して巻回することができる。
【0013】
また、下ローラ軸の雄ねじと螺合可能な雌ねじが螺刻されたねじ筒を回動することで下ローラ軸を進退移動させるようにしたので、下送りローラの案内溝の軸方向への微調整が容易にでき、しかも芯出し作業時間の短縮を図ることができる。 また、上記ねじ筒を数値制御可能なサーボモータなどにより駆動させるようにすれば、下送りローラの案内溝の軸方向への調整が容易に自動制御化できる。
【0015】
さらに、上ローラ軸と同一軸心で機枠体の雌ねじに螺合された軸受筒を回動することで、その軸受を介して前記上ローラ軸を進退移動させるようにしたので、上送りローラの案内溝の軸方向への微調整が容易にでき、しかも芯出し作業時間の短縮を図ることができる。 また、上記軸受筒を数値制御可能なサーボモータなどにより駆動させるようにすれば、上送りローラの案内溝の軸方向への調整が容易に自動制御化できる。
【0016】
【発明の実施の形態】
本発明のばね成形機の線材送り装置に係る実施の形態について、コイルばね成形機図1〜図3を参照して以下のとおり説明する。 図1は本発明に係るばね成形機の線材送り装置を示す正面図、図2の(a)は図1のA−A矢視断面図、(b)はC部の拡大図、図3は図2のB−B矢視拡大断面図である。
ばね成形機の線材送り装置は、線材Wをクイル4前方のコイルばね成形空間へ送り出す装置であって、線材の下半部に作用する線材下送り装置と、線材の上半部に作用する線材上送り装置と、線材Wを加圧する線材加圧装置とで構成する。
【0017】
線材下送り装置の要部は、線材の下半部を案内可能な下送りローラ11、この下送りローラ11を止着して一体的に回動可能な下ローラ軸12、この下ローラ軸12を軸方向に移動調整する下軸調整機構のねじ筒13などで構成する。 線材上送り装置の要部は、線材の上半部を案内可能な上送りローラ21、この上送りローラ21を止着して一体的に回動可能な上ローラ軸22、この上ローラ軸22を軸方向に移動調整する上軸調整機構の軸受筒23などで構成する。 線材加圧装置の要部は、圧縮コイルばね44を介して加圧ブロック25を加圧する加圧ねじ棒42、調整車43、雌ねじ板45などで構成する。
【0018】
まず、線材送り装置の機枠体1は、その前枠板1Aと後枠板1Bとが一体的に立設されている。 線材下送り装置の下ローラ軸12は、前枠板1Aの軸受穴に嵌入されたころがり玉軸受14A,針状ころ軸受14B,ころがり玉軸受14C,14Dと、後枠板1Bの軸受穴に嵌入された針状ころ軸受14Eとにより回動可能で、かつ、各軸受の内輪に案内されて軸方向へ進退移動可能に支承されている。 この下ローラ軸12には下送りローラ11が、止めピン12Aと抑え板12Bとにより一体的に止着されている。 この下送りローラ11の外周には図2(b)に示す案内溝11aが、線材Wの下半部を案内可能に形成されている。
【0019】
また、下ローラ軸12には針状ころ軸受14Bと、ころがり玉軸受14Cとの間に圧縮コイルばね15が挿入され、ころがり玉軸受14C,14Dは、前枠板1Aに締着された側板16と軸受穴の段部とにより軸方向への移動が拘束されている。 したがって、下ローラ軸12は圧縮コイルばね15の伸張力により、針状ころ軸受14B,ころがり玉軸受14A,鍔部12aを介して下送りローラ11の止着側へ付勢される。
【0020】
そして、下ローラ軸12の略中央部には雄ねじ12bが螺刻され、この雄ねじ12bにねじ筒13の雌ねじ13aが螺合されているので、圧縮コイルばね15により付勢される下ローラ軸12は、ねじ筒13が側板16に当接することで下送りローラ11の止着側への移動が規定される。 すなわち、下ローラ軸12の差込穴12cに図示しない回動防止棒を差し込んで下ローラ軸12の回動を抑止し、ねじ筒13に穿孔された複数個の差込穴13bのいずれかに図示しない回動棒を差し込んでねじ筒13を回動することで、下ローラ軸12とともに下送りローラ11を軸方向へ移動調整することができる。 調整後には、止めねじ13Aによりねじ筒13の自転を防止する。
【0021】
また、後枠板1Bには、数値制御手段により回動方向、回動量が制御可能なサーボモータ31が取着され、その出力軸に駆動歯車32がキーを介して止着されている。 この駆動歯車32と噛合するように下ローラ軸12に、中間歯車33がキーを介して止着されている。 そして、下ローラ軸12は、数値制御手段の指令により回動制御されるサーボモータ31の駆動力により駆動歯車32と中間歯車33とを介して回動制御される。
【0022】
次いで、線材上送り装置の上ローラ軸22は、後述する加圧ブロック25の軸受穴に嵌入されたころがり玉軸受24A,針状ころ軸受24B,ころがり玉軸受24Cと、後述する軸受筒23の軸受穴に嵌入されたころがり玉軸受24D,24Eとにより回動可能で、かつ、ころがり玉軸受24A,針状ころ軸受24B,ころがり玉軸受24Cの内輪に案内されて軸方向へ進退移動可能に支承されている。 この上ローラ軸22には上送りローラ21が、止めピン22Aと抑え板22Bとにより一体的に止着されている。 この上送りローラ21の外周には図2(b)に示す案内溝21aが、線材Wの上半部を案内可能に形成されている。
【0023】
上ローラ軸22の前端側を支承する加圧ブロック25は、図1に示す前枠板1Aの抜き窓1aの両側面に案内されて上下移動可能に設けられ、前枠板1Aの上部との間に張架された引張コイルばね41により上方へ付勢されている。 後枠板1Bの背面側上部に図3に示す左右対称な一対の揺動軸受板26,26が取着され、両端の水平突出部26b,26bにおいてそれぞれ2個のボルト26A,26Aで締着されていて、この揺動軸受板26,26には、上ローラ軸22の軸心を挟む水平軸線上に軸穴26a,26aが穿孔され、この軸穴26a,26aに支承された揺動駒27に上ローラ軸22の後端側を支承する軸受筒23が螺合されている。
【0024】
すなわち、揺動駒27の内周に雌ねじ27aが螺刻され、軸心と直交する両側には揺動支軸27b,27bが突設されている。 この揺動支軸27b,27bが揺動軸受板26,26の軸穴26a,26a内で回動可能に挿入された揺動駒27は、揺動支軸27b,27bを中心にして揺動自在である。 したがって、軸受筒23は、その外周に螺刻された雄ねじ23aが、揺動駒27の雌ねじ27aに螺合されているので一体的に揺動自在である。 この軸受筒23の軸受穴に嵌入されたころがり玉軸受24D,24Eは、軸受筒23に締着された抑え板28により軸方向への移動が抑止されている。
【0025】
これらのころがり玉軸受24D,24Eに対して上ローラ軸22は、その軸端に締着された軸止め板29により軸方向への移動が抑止されている。 そして、軸受筒23には複数個の差込穴23bが穿孔されており、差込穴23bのいずれかに図示しない回動棒を差し込んで軸受筒23を回動することで、軸受筒23が揺動駒27に対して移動し、上ローラ軸22とともに上送りローラ21を軸方向へ移動調整することができる。 調整後には、止めねじ27Aにより軸受筒23の自転を防止する。 また、上ローラ軸22には中間歯車33と同歯数の従動歯車34が、中間歯車33と噛合するようにキーを介して止着されており、上ローラ軸22は、下ローラ軸12と逆回転方向で同期回動制御される。
【0026】
次いで、線材加圧装置は、前枠板1Aの上部に雌ねじ45bが鉛直に螺刻された雌ねじ板45が取着され、この雌ねじ45bには、上端に調整車43が止着された加圧ねじ棒42が螺合され、その下端近傍の段部と加圧ブロック25の上面との間には圧縮コイルばね44が挟入されている。 そして、調整車43を回動させて、引張コイルばね41に抗して加圧ねじ棒42を下降させることで、加圧ブロック25を下方へ加圧できる。
【0027】
この加圧力により、図2(b)に示す下送りローラ11の案内溝11aと、上送りローラ21の案内溝21aとで線材Wを加圧して、下送りローラ11,上送りローラ21の回動により線材Wを送り出す摩擦力が設定される。 また、雌ねじ板45には加圧ねじ棒42に対して直角方向から止めねじ45Aが挿入される雌ねじが穿孔され、この止めねじ45Aを締め込むことで、加圧ねじ棒42の自転を防止している。
【0028】
引き続いて、ばね成形機の線材送り装置により線材Wを送り出す手順について説明する。 まず、コイルばねを成形加工する前には、以下の調整をしてから線材を送り出す。 下送りローラ11,上送りローラ21により送り出される線材Wを前方へ案内する案内筒3の案内穴軸心に対して、下送りローラ11,上送りローラ21に挟持された線材Wの軸心が同一軸心になるように、ねじ筒13の回動調整により下送りローラ11の案内溝11aを、軸受筒23の回動調整により上送りローラ21の案内溝21aを軸方向へ移動調整する。
【0029】
下送りローラ11の案内溝11aと、上送りローラ21の案内溝21aとの相互軸心の偏心量は、送り出す線材Wに曲げ応力を付加し一定方向の湾曲した流れを与え、密着コイルばねに安定した初張力を付与して巻回するか、湾曲した流れがないよう線材Wに曲げ応力を付加しないかによって、ねじ筒13または軸受筒23の回動調整を適時行うことにより加減調整する。 また、下送りローラ11の案内溝11aと、上送りローラ21の案内溝21aとにより線材Wを挟持する加圧力は、加圧ねじ棒42の回動により加減調整する。
【0030】
このようにして下送りローラ11,上送りローラ21の偏心量と加圧力とを調整した後、サーボモータ31の回動制御により図1に示す下送りローラ11を時計方向に回転させると、上送りローラ21は反時計方向に回転する。 その回転に従い加圧力で設定された摩擦力により線材Wは、導入筒2の紙面左側に図示しないリールスタンドなどで貯蔵された位置から引き出されて、案内筒3に送り込まれ、案内筒3の先端に設けられたクイル4を経て成形空間へ送り出され、その線材Wが成形工具T1,T2に衝合することで、コイルばねが成形加工される。
【0031】
なお、本発明に係るばね成形機の線材送り装置は、上述した実施の形態に何ら限定されるものではなく、本発明の要旨を逸脱しない範囲においてさまざまな形態に構成することができる。 例えば、成形加工する線材の断面形状は円形に限定されるものではなく、上下送りローラの案内溝や線材案内筒の案内穴を成形加工する線材の断面形状と相似形に形成すれば、四角形や六角形の線材にも対応できる。
【0032】
【発明の効果】
本発明は、上述したように構成したので、以下に記載するような効果を奏する。
【0033】
請求項1の発明によれば、下ローラ軸を軸方向へ進退移動させて下送りローラの案内溝位置を軸方向に調整する下軸調整機構と、上ローラ軸を軸方向へ進退移動させて上送りローラの案内溝位置を軸方向に調整する上軸調整機構とを備えて、上下送りローラの各案内溝を軸方向へ移動調整することで、線材案内筒の案内穴に対する上下送りローラの各案内溝の偏心量を僅少にし、送り出される線材が線材案内筒の案内穴の入口側面に強く押圧されないようにして、線材の外周に疵を発生させずにコイルばねの成形加工ができるので、品質の向上を図ることができる。
【0034】
また、下軸調整機構または上軸調整機構により、上下送りローラの各案内溝を軸方向へ移動調整できるのでライナー調整の必要がなく、巻回する線材径の変更による段取り替えの際などにおける、線材案内筒の案内穴に対する上下送りローラの各案内溝の芯出し時間を短縮して生産性の向上を図ることができる。 さらに、下軸調整機構または上軸調整機構により、下送りローラと上送りローラとの各案内溝の相互の偏心量を調整することで、送り出す線材に曲げ応力を付加し一定方向の湾曲した流れを与え、密着コイルばねに安定した初張力を付与して巻回することができるので、品質の向上を図ることができる。
【0035】
また、下ローラ軸の雄ねじと螺合可能な雌ねじが螺刻されたねじ筒を回動することで下ローラ軸を進退移動させるようにしたので、下送りローラの案内溝の軸方向への微調整が容易にでき、しかも芯出し作業時間を短縮して生産性の向上を図ることができる。 また、上記ねじ筒を数値制御可能なサーボモータなどにより駆動させるようにすれば、下送りローラの案内溝の軸方向への調整が容易に自動制御化できる。
【0036】
さらに、上ローラ軸と同一軸心で機枠体の雌ねじに螺合された軸受筒を回動することで、軸受を介して前記上ローラ軸を進退移動させるようにしたので、上送りローラの案内溝の軸方向への微調整が容易にでき、しかも芯出し作業時間を短縮して生産性の向上を図ることができる。 また、上記軸受筒を数値制御可能なサーボモータなどにより駆動させるようにすれば、上送りローラの案内溝の軸方向への調整が容易に自動制御化できる。
【図面の簡単な説明】
【図1】本発明に係るばね成形機の線材送り装置を示し、その正面図である。
【図2】同じく、(a)は図1のA−A矢視断面図、(b)はC部の拡大図である。
【図3】同じく、図2のB−B矢視拡大断面図である。
【図4】従来技術Aに係るばね成形機の線材送り装置を示し、(a)は縦断面図、(b)はD部の拡大図である。
【図5】従来技術Bに係る線材の予備加工装置を示す縦断面図である。
【符号の説明】
1 機枠体
3 案内筒
11 下送りローラ
11a 案内溝
12 下ローラ軸
13 ねじ筒
15 圧縮コイルばね
21 上送りローラ
21a 案内溝
22 上ローラ軸
23 軸受筒
25 加圧ブロック
26 揺動軸受板
27 揺動駒
31 サーボモータ
32 駆動歯車
33 中間歯車
34 従動歯車
42 加圧ねじ棒
44 圧縮コイルばね
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wire rod feeding device of a spring molding machine that feeds a wire rod to a coil spring molding space in front of a quill.
[0002]
[Prior art]
Conventional techniques include, for example, a wire feeder for a spring forming machine (hereinafter referred to as conventional art A) shown in FIG. 4 and a wire pre-processing method and pre-processing apparatus disclosed in Japanese Patent Laid-Open No. 7-32078. Such an invention (hereinafter referred to as Conventional Technology B) is known. First, in the prior art A, as shown in FIG. 4, the lower roller shaft 113 is fixed to the lower feed roller 111 and rotatably supported on the machine frame body 115, and the upper roller shaft 114 is attached to the upper feed roller 112. It is supported by the machine frame 115 so as to be fixed and turnable.
These lower roller shaft 113 and upper roller shaft 114 cannot be moved and adjusted in the axial direction.
[0003]
For this reason, a distance L101 between the axis of the guide groove 111a of the lower feed roller 111 that feeds out the wire rod and the reference plane, and a distance L102 between the axis of the guide groove 112a of the upper feed roller 112 and the reference plane, It is decentered by a machining tolerance at the maximum with respect to the distance L100 between the axis of the guide hole of a wire guide tube (not shown) that guides the fed wire forward and the reference plane. As the amount of eccentricity increases with respect to the wire diameter, the wire fed from the guide grooves 111a and 112a is strongly pressed against the entrance side of the guide hole of the wire guide tube, and there is a problem that wrinkles are generated on the outer periphery of the wire. It was.
[0004]
Since there is a minimum processing tolerance of each part that causes eccentricity between the guide grooves 111a and 112a and the guide hole of the wire guide tube, the wire diameter is particularly small in a thin wire having a wire diameter of 0.4 mm or less. On the other hand, the ratio of eccentricity due to processing tolerance is high, and it is easy to be damaged. In order to minimize the amount of eccentricity, the axial positions of the guide grooves 112a and 111a of the upper and lower feed rollers 112 and 111 are set to the lower roller shaft 113 and the upper roller shaft 114 every time the setup is changed. There is a problem that it takes time to center by adjusting the liner.
[0005]
In addition, when winding the contact coil spring with a stable initial tension, the distance L101 between the axis of the guide groove 111a of the lower feed roller 111 and the reference surface, and the guide groove 112a of the upper feed roller 112 are set. The distance L102 between the shaft center and the reference surface is varied by a set amount, and the shaft centers of both guide grooves are decentered to apply bending stress to the wire to be fed to give a curved flow in a certain direction. In the invention of A, since the guide grooves 111a and 112a cannot be moved and adjusted in the axial direction, there is a problem that a stable initial tension cannot be applied. The invention of the following prior art B is improved to solve the problems of the prior art A.
[0006]
As shown in FIG. 5, the invention of the prior art B includes a bearing member 216 in which the upper roller shaft 214 is rotatably and non-slidably connected, and a linear motion along the advancing / retreating direction of the bearing member 216. It is provided with a conversion mechanism composed of a rotary motion part 217 and a linear motion part 218 so as to convert to When winding the close coil spring with initial tension, the upper roller shaft 214 is moved in the axial direction by rotating the bearing member, and the upper roller shaft 214 is moved upward with respect to the guide groove of the lower feed roller 211. The guide groove of the feed roller 212 is decentered by a set amount, and bending stress is applied to the wire to be fed to give a curved flow (preliminary bending) in a certain direction so that a stable initial tension is applied to the coil spring to be wound. It is.
[0007]
[Problems to be solved by the invention]
However, in the invention of the prior art B, only the upper roller shaft 214 can be moved and adjusted in the axial direction, so that the position of the guide groove of the lower feed roller 211 cannot be adjusted with respect to the guide hole of the wire guide tube. That is, when the guide groove of the lower feed roller 211 is decentered by a machining tolerance with respect to the guide hole of the wire guide tube as in the invention of the prior art A, the wire to be sent out is the entrance of the guide hole of the wire guide tube. There is a problem that it takes time to center the guide groove of the lower feed roller 211 in the axial direction with the lower roller shaft 213 by adjusting the liner so as not to be strongly pressed against the side surface. Note that the amount of eccentricity that decenters the guide groove of the upper feed roller 212 when winding with initial tension is decentered within a range where no wrinkles are formed on the wire.
[0008]
The present invention has been made in view of such problems, and the object of the present invention is to generate a wrinkle on the outer periphery of the wire rod when the wire to be fed is strongly pressed against the entrance side surface of the guide hole of the wire rod guide tube. Problems such as the need for wasted time for centering by adjusting the liner when changing the wire diameter, etc. It is intended to solve the problem that a stable initial tension cannot be applied because the movement cannot be adjusted in the direction.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, a wire rod feeding device for a spring forming machine according to claim 1 of the present invention is a wire rod feeding device for a spring molding machine for feeding a wire rod to a coil spring forming space in front of a quill,
A lower feed roller guidable guide groove lower half of the wires are formed on the outer periphery, is integrally supported so as to be moved forward and backward in the rotation possible and axially secured to the lower feed roller to the front end A lower roller shaft in which a male screw is engraved , and this lower roller shaft is always urged toward a lower feed roller fixing side by a coil spring, and a screw cylinder screwed with the male screw is rotated to rotate the lower roller shaft. A lower shaft adjustment mechanism that moves forward and backward against the coil spring;
An upper feed roller in which a guide groove capable of guiding the upper half of the wire rod is formed on the outer periphery, and the lower feed roller and the upper feed roller are fixed to the front end at a position close to each other in parallel. An upper roller shaft that is pivotally movable and supported so as to move forward and backward in the axial direction;
A bearing cylinder supporting the rear end side of the upper roller shaft is screwed into a female screw provided on the machine frame with the same axis as the upper roller shaft, and the bearing cylinder is rotated to rotate the bearing. And an upper shaft adjusting mechanism for moving the upper roller shaft forward and backward through the guide roller, and each guide groove of the lower feed roller and the upper feed roller can be finely adjusted in the axial direction .
[0010]
According to the first aspect of the present invention, the lower roller shaft is moved forward and backward in the axial direction to adjust the guide groove position of the lower feed roller in the axial direction, and the upper roller shaft is moved forward and backward in the axial direction. And an upper shaft adjusting mechanism for adjusting the guide groove position of the upper feed roller in the axial direction, and by moving and adjusting each guide groove of the vertical feed roller in the axial direction, the vertical feed roller with respect to the guide hole of the wire guide tube The coil spring can be formed without generating wrinkles on the outer periphery of the wire rod by making the amount of eccentricity of each guide groove small and preventing the wire rod fed out from being strongly pressed against the entrance side surface of the guide hole of the wire rod guide tube.
[0011]
Also, the guide shaft of the vertical feed roller can be moved and adjusted in the axial direction by the lower shaft adjustment mechanism or the upper shaft adjustment mechanism, so there is no need to adjust the liner, and the wire rod when changing the diameter of the wound wire rod The centering time of each guide groove of the vertical feed roller with respect to the guide hole of the guide cylinder can be shortened. Furthermore, by adjusting the amount of eccentricity of the guide grooves of the lower feed roller and the upper feed roller by the lower shaft adjustment mechanism or the upper shaft adjustment mechanism, a bending stress is applied to the wire to be fed and the flow is curved in a certain direction. (Preliminary bending) can be applied, and a tight initial tension can be applied to the contact coil spring for winding.
[0013]
In addition , the lower roller shaft is moved forward and backward by rotating a screw cylinder in which a female screw that can be screwed with the male screw of the lower roller shaft is threaded. Adjustment can be made easily, and the centering operation time can be shortened. If the screw cylinder is driven by a numerically controllable servo motor or the like, the adjustment of the guide groove of the lower feed roller in the axial direction can be easily and automatically controlled.
[0015]
Further , by rotating the bearing cylinder screwed into the female thread of the machine frame with the same axis as the upper roller shaft, the upper roller shaft is moved forward and backward through the bearing. The guide groove can be finely adjusted in the axial direction, and the centering operation time can be shortened. If the bearing cylinder is driven by a numerically controllable servo motor or the like, the adjustment of the guide groove of the upper feed roller in the axial direction can be easily and automatically controlled.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment relating to a wire rod feeding device for a spring forming machine of the present invention will be described as follows with reference to FIGS. 1 is a front view showing a wire rod feeding device of a spring forming machine according to the present invention, FIG. 2A is a cross-sectional view taken along the line AA in FIG. 1, FIG. FIG. 3 is an enlarged cross-sectional view taken along the line B-B in FIG. 2.
The wire rod feeding device of the spring forming machine is a device for feeding the wire rod W to the coil spring forming space in front of the quill 4 and includes a wire rod lower feeding device that acts on the lower half of the wire rod and a wire rod that acts on the upper half of the wire rod. It comprises an upper feed device and a wire pressurizing device that pressurizes the wire W.
[0017]
The main parts of the wire rod lower feed device include a lower feed roller 11 that can guide the lower half of the wire rod, a lower roller shaft 12 that can be fixed and rotated integrally with the lower feed roller 11, and the lower roller shaft 12. Is composed of a screw cylinder 13 or the like of a lower shaft adjusting mechanism that moves and adjusts in the axial direction. The main part of the wire rod upper feed device includes an upper feed roller 21 capable of guiding the upper half of the wire rod, an upper roller shaft 22 that can be fixed to the upper feed roller 21 and rotated integrally, and the upper roller shaft 22. Is constituted by a bearing cylinder 23 of an upper shaft adjusting mechanism for moving and adjusting the shaft in the axial direction. The main part of the wire pressurizing device includes a pressurizing screw rod 42 that pressurizes the pressurizing block 25 via a compression coil spring 44, an adjustment wheel 43, a female screw plate 45, and the like.
[0018]
First, the machine frame 1 of the wire rod feeding apparatus has a front frame plate 1A and a rear frame plate 1B erected integrally. The lower roller shaft 12 of the wire rod lower feed device is fitted into the bearing holes of the rolling ball bearing 14A, the needle roller bearing 14B, the rolling ball bearings 14C and 14D and the rear frame plate 1B which are fitted into the bearing holes of the front frame plate 1A. It is supported by the needle roller bearing 14E, and is supported by the inner ring of each bearing so as to be movable forward and backward in the axial direction. A lower feed roller 11 is integrally fixed to the lower roller shaft 12 by a stop pin 12A and a holding plate 12B. A guide groove 11a shown in FIG. 2B is formed on the outer periphery of the lower feed roller 11 so that the lower half of the wire W can be guided.
[0019]
A compression coil spring 15 is inserted into the lower roller shaft 12 between the needle roller bearing 14B and the rolling ball bearing 14C. The rolling ball bearings 14C and 14D are side plates 16 fastened to the front frame plate 1A. The movement in the axial direction is restricted by the step of the bearing hole. Accordingly, the lower roller shaft 12 is urged toward the stationary side of the lower feed roller 11 by the extension force of the compression coil spring 15 via the needle roller bearing 14B, the rolling ball bearing 14A, and the flange portion 12a.
[0020]
Then, a male screw 12b is screwed into a substantially central portion of the lower roller shaft 12, and the female screw 13a of the screw cylinder 13 is screwed into the male screw 12b, so that the lower roller shaft 12 urged by the compression coil spring 15 is engaged. In other words, the movement of the lower feed roller 11 toward the stationary side is regulated by the screw cylinder 13 coming into contact with the side plate 16. That is, a rotation prevention rod (not shown) is inserted into the insertion hole 12 c of the lower roller shaft 12 to suppress the rotation of the lower roller shaft 12, and is inserted into any of the plurality of insertion holes 13 b drilled in the screw cylinder 13. By inserting a rotation rod (not shown) and rotating the screw cylinder 13, the lower feed roller 11 together with the lower roller shaft 12 can be moved and adjusted in the axial direction. After the adjustment, the screw cylinder 13 is prevented from rotating by the set screw 13A.
[0021]
A servo motor 31 whose rotation direction and rotation amount can be controlled by numerical control means is attached to the rear frame plate 1B, and a drive gear 32 is fixed to the output shaft via a key. An intermediate gear 33 is fixed to the lower roller shaft 12 via a key so as to mesh with the drive gear 32. The lower roller shaft 12 is rotationally controlled via the drive gear 32 and the intermediate gear 33 by the driving force of the servo motor 31 that is rotationally controlled by a command from the numerical control means.
[0022]
Next, the upper roller shaft 22 of the wire rod upper feed device is a bearing of a rolling ball bearing 24A, a needle roller bearing 24B, a rolling ball bearing 24C, and a bearing cylinder 23 which will be described later. It can be rotated by the rolling ball bearings 24D and 24E fitted in the holes, and is supported by the inner rings of the rolling ball bearing 24A, the needle roller bearing 24B, and the rolling ball bearing 24C so as to be movable forward and backward in the axial direction. ing. An upper feed roller 21 is integrally fixed to the upper roller shaft 22 by a stop pin 22A and a holding plate 22B. A guide groove 21a shown in FIG. 2B is formed on the outer periphery of the upper feed roller 21 so that the upper half of the wire W can be guided.
[0023]
The pressure block 25 that supports the front end side of the upper roller shaft 22 is guided by both side surfaces of the extraction window 1a of the front frame plate 1A shown in FIG. It is biased upward by a tension coil spring 41 stretched between them. A pair of left and right oscillating bearing plates 26, 26 shown in FIG. 3 are attached to the upper rear side of the rear frame plate 1B, and fastened with two bolts 26A, 26A at the horizontal protrusions 26b, 26b at both ends, respectively. The swing bearing plates 26 and 26 are provided with shaft holes 26a and 26a on the horizontal axis sandwiching the axis of the upper roller shaft 22, and the swing pieces supported by the shaft holes 26a and 26a. A bearing cylinder 23 that supports the rear end side of the upper roller shaft 22 is screwed onto the shaft 27.
[0024]
That is, a female screw 27a is threaded on the inner periphery of the swing piece 27, and swing support shafts 27b and 27b are provided on both sides orthogonal to the shaft center. The swing piece 27 in which the swing support shafts 27b and 27b are rotatably inserted in the shaft holes 26a and 26a of the swing bearing plates 26 and 26 swings around the swing support shafts 27b and 27b. It is free. Therefore, since the male screw 23a threaded on the outer periphery of the bearing cylinder 23 is screwed into the female screw 27a of the swinging piece 27, the bearing tube 23 can swing freely. The rolling ball bearings 24 </ b> D and 24 </ b> E fitted into the bearing holes of the bearing cylinder 23 are restrained from moving in the axial direction by a restraining plate 28 fastened to the bearing cylinder 23.
[0025]
The upper roller shaft 22 is prevented from moving in the axial direction with respect to these rolling ball bearings 24D and 24E by a shaft stopper plate 29 fastened to the shaft end. A plurality of insertion holes 23b are formed in the bearing cylinder 23, and a rotation rod (not shown) is inserted into any of the insertion holes 23b so that the bearing cylinder 23 is rotated. The upper feed roller 21 can be moved and adjusted in the axial direction together with the upper roller shaft 22 by moving relative to the swing piece 27. After the adjustment, rotation of the bearing cylinder 23 is prevented by the set screw 27A. A driven gear 34 having the same number of teeth as the intermediate gear 33 is fixed to the upper roller shaft 22 through a key so as to mesh with the intermediate gear 33. The upper roller shaft 22 is connected to the lower roller shaft 12. Synchronous rotation control is performed in the reverse rotation direction.
[0026]
Next, in the wire pressure device, a female screw plate 45 in which a female screw 45b is vertically threaded is attached to the upper portion of the front frame plate 1A, and a pressure wheel with an adjustment wheel 43 fixed to the upper end of the female screw 45b. The screw rod 42 is screwed, and a compression coil spring 44 is sandwiched between a step near the lower end thereof and the upper surface of the pressure block 25. Then, the pressurizing block 25 can be pressed downward by rotating the adjusting wheel 43 and lowering the pressurizing screw rod 42 against the tension coil spring 41.
[0027]
With this applied pressure, the wire W is pressed by the guide groove 11 a of the lower feed roller 11 and the guide groove 21 a of the upper feed roller 21 shown in FIG. 2B, and the lower feed roller 11 and the upper feed roller 21 rotate. The frictional force for feeding the wire W by the movement is set. The female screw plate 45 is perforated with a female screw into which a set screw 45A is inserted from a direction perpendicular to the pressurizing screw rod 42. By tightening the set screw 45A, rotation of the pressurizing screw rod 42 is prevented. ing.
[0028]
Subsequently, a procedure for feeding the wire W by the wire feeder of the spring forming machine will be described. First, before forming the coil spring, the wire rod is sent out after the following adjustment. The shaft center of the wire W sandwiched between the lower feed roller 11 and the upper feed roller 21 is different from the guide hole shaft center of the guide tube 3 that guides the wire W fed by the lower feed roller 11 and the upper feed roller 21 forward. The guide groove 11a of the lower feed roller 11 is moved and adjusted in the axial direction by adjusting the rotation of the bearing cylinder 23 so that the screw cylinder 13 is rotated.
[0029]
The eccentric amount of the mutual axial center between the guide groove 11a of the lower feed roller 11 and the guide groove 21a of the upper feed roller 21 applies a bending stress to the wire W to be fed to give a curved flow in a certain direction, and to the close coil spring. Adjustment is made by adjusting the rotation of the screw cylinder 13 or the bearing cylinder 23 in a timely manner depending on whether winding is performed with a stable initial tension or bending stress is not applied to the wire W so that there is no curved flow. Further, the pressing force for holding the wire W by the guide groove 11 a of the lower feed roller 11 and the guide groove 21 a of the upper feed roller 21 is adjusted by the rotation of the pressure screw rod 42.
[0030]
After adjusting the eccentric amount and the applied pressure of the lower feed roller 11 and the upper feed roller 21 in this way, when the lower feed roller 11 shown in FIG. The feed roller 21 rotates counterclockwise. The wire W is pulled out from a position stored in a reel stand or the like (not shown) on the left side of the paper surface of the introduction tube 2 by the frictional force set by the pressurizing force according to the rotation, and is fed into the guide tube 3 to be The coil spring is formed by being fed into the forming space through the quill 4 provided in the wire and the wire W abuts against the forming tools T1 and T2.
[0031]
The wire feeding device of the spring forming machine according to the present invention is not limited to the above-described embodiment, and can be configured in various forms without departing from the gist of the present invention. For example, the cross-sectional shape of the wire to be processed is not limited to a circle, but if the guide groove of the vertical feed roller and the guide hole of the wire guide tube are formed in a shape similar to the cross-sectional shape of the wire to be processed, Applicable to hexagonal wire.
[0032]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
[0033]
According to the first aspect of the present invention, the lower roller shaft is moved forward and backward in the axial direction to adjust the guide groove position of the lower feed roller in the axial direction, and the upper roller shaft is moved forward and backward in the axial direction. An upper shaft adjusting mechanism that adjusts the guide groove position of the upper feed roller in the axial direction, and by moving and adjusting each guide groove of the vertical feed roller in the axial direction, the upper feed roller of the upper feed roller with respect to the guide hole of the wire guide tube Since the amount of eccentricity of each guide groove is made small and the wire to be fed is not strongly pressed against the entrance side of the guide hole of the wire guide tube, the coil spring can be molded without generating wrinkles on the outer periphery of the wire, The quality can be improved.
[0034]
In addition, the lower shaft adjustment mechanism or the upper shaft adjustment mechanism can move and adjust each guide groove of the vertical feed roller in the axial direction, so there is no need for liner adjustment, and when changing the setup by changing the diameter of the wound wire, Productivity can be improved by shortening the centering time of each guide groove of the vertical feed roller with respect to the guide hole of the wire guide tube. Furthermore, by adjusting the amount of eccentricity of the guide grooves of the lower feed roller and the upper feed roller by the lower shaft adjustment mechanism or the upper shaft adjustment mechanism, a bending stress is applied to the wire to be fed and the flow is curved in a certain direction. Since the coil coil can be wound with a stable initial tension applied to the close coil spring, the quality can be improved.
[0035]
In addition , the lower roller shaft is moved forward and backward by rotating a screw cylinder in which a female screw that can be screwed with the male screw of the lower roller shaft is threaded. Adjustment can be facilitated, and the centering operation time can be shortened to improve productivity. If the screw cylinder is driven by a numerically controllable servo motor or the like, the adjustment of the guide groove of the lower feed roller in the axial direction can be easily and automatically controlled.
[0036]
Furthermore , the upper roller shaft is moved forward and backward through the bearing by rotating the bearing cylinder screwed into the female thread of the machine frame body with the same axis as the upper roller shaft. Fine adjustment in the axial direction of the guide groove can be facilitated, and the centering operation time can be shortened to improve productivity. If the bearing cylinder is driven by a numerically controllable servo motor or the like, the adjustment of the guide groove of the upper feed roller in the axial direction can be easily and automatically controlled.
[Brief description of the drawings]
FIG. 1 is a front view of a wire feeding device for a spring forming machine according to the present invention.
2A is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 2B is an enlarged view of a portion C. FIG.
3 is an enlarged sectional view taken along the line BB in FIG.
4A and 4B show a wire feeding device of a spring forming machine according to prior art A, in which FIG. 4A is a longitudinal sectional view, and FIG. 4B is an enlarged view of a D part.
5 is a longitudinal sectional view showing a wire pre-processing apparatus according to prior art B. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Machine frame 3 Guide cylinder 11 Lower feed roller 11a Guide groove 12 Lower roller shaft 13 Screw cylinder 15 Compression coil spring 21 Upper feed roller 21a Guide groove 22 Upper roller shaft 23 Bearing cylinder 25 Pressure block 26 Oscillating bearing plate 27 Moving piece 31 Servo motor 32 Drive gear 33 Intermediate gear 34 Driven gear 42 Pressure screw rod 44 Compression coil spring

Claims (1)

線材をクイル前方のコイルばね成形空間へ送り出すばね成形機の線材送り装置であって、
線材の下半部を案内可能な案内溝が外周に形成された下送りローラと、この下送りローラを前端に止着して一体的に回動可能でかつ軸方向へ進退移動可能に支承され雄ねじが螺刻された下ローラ軸と、この下ローラ軸はコイルばねにより下送りローラ止着側へ常時付勢され前記雄ねじと螺合されたねじ筒が回動されることで前記下ローラ軸を前記コイルばねに抗して進退移動させる下軸調整機構と、
線材の上半部を案内可能な案内溝が外周に形成された上送りローラと、前記下送りローラと相互の外周が平行して近接する位置で前記上送りローラを前端に止着して一体的に回動可能で且つ軸方向へ進退移動可能に支承された上ローラ軸と、
この上ローラ軸の後端側を支承する軸受の軸受筒が前記上ローラ軸と同一軸心で機枠体に設けられた雌ねじに螺合され、前記軸受筒が回動されることで前記軸受を介して前記上ローラ軸を進退移動させる上軸調整機構を備えてなり、前記下送りローラ及び上送りローラのそれぞれの案内溝を軸方向に微調整可能としたことを特徴とするばね成形機の線材送り装置。
A wire rod feeder for a spring molding machine that feeds a wire rod to a coil spring molding space in front of the quill,
A lower feed roller guidable guide groove lower half of the wires are formed on the outer periphery, is integrally supported so as to be moved forward and backward in the rotation possible and axially secured to the lower feed roller to the front end A lower roller shaft in which a male screw is engraved , and this lower roller shaft is always urged toward a lower feed roller fixing side by a coil spring, and a screw cylinder screwed with the male screw is rotated to rotate the lower roller shaft. A lower shaft adjustment mechanism that moves forward and backward against the coil spring;
An upper feed roller in which a guide groove capable of guiding the upper half of the wire rod is formed on the outer periphery, and the lower feed roller and the upper feed roller are fixed to the front end at a position close to each other in parallel. An upper roller shaft that is pivotally movable and supported so as to move forward and backward in the axial direction;
A bearing cylinder supporting the rear end side of the upper roller shaft is screwed into a female screw provided on the machine frame with the same axis as the upper roller shaft, and the bearing cylinder is rotated to rotate the bearing. A spring forming machine comprising an upper shaft adjusting mechanism for moving the upper roller shaft forward and backward via a guide, and wherein each guide groove of the lower feed roller and the upper feed roller can be finely adjusted in the axial direction. Wire feeder.
JP2002250317A 2002-08-29 2002-08-29 Wire feeder for spring forming machine Expired - Fee Related JP3913644B2 (en)

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Cited By (2)

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CN104162613A (en) * 2014-07-23 2014-11-26 诸暨市何腾机械弹簧厂 Feeding device for spring machine
CN105834332A (en) * 2016-05-23 2016-08-10 东莞市开创精密机械有限公司 Adjusting device for wire feeding wheel of spring machine

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CN102554076B (en) * 2010-12-13 2014-01-08 上海工程技术大学 A coil spring machine feed positioning assembly
DE102015208346B4 (en) * 2015-05-06 2017-02-23 Wafios Aktiengesellschaft Feeding device for forming machine
KR102638249B1 (en) * 2021-12-23 2024-02-20 박재석 Rolling mill for precious metal
CN120001905B (en) * 2025-03-31 2025-09-26 广东习达科技实业有限公司 Reinforcing steel bar scoring mechanism and scoring process for automatic reinforcing steel bar processing equipment

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104162613A (en) * 2014-07-23 2014-11-26 诸暨市何腾机械弹簧厂 Feeding device for spring machine
CN104162613B (en) * 2014-07-23 2016-02-24 诸暨市何腾机械弹簧厂 A kind of pay-off of coiling machine
CN105834332A (en) * 2016-05-23 2016-08-10 东莞市开创精密机械有限公司 Adjusting device for wire feeding wheel of spring machine

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