JP3755060B2 - Clamping device - Google Patents

Clamping device Download PDF

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JP3755060B2
JP3755060B2 JP18043197A JP18043197A JP3755060B2 JP 3755060 B2 JP3755060 B2 JP 3755060B2 JP 18043197 A JP18043197 A JP 18043197A JP 18043197 A JP18043197 A JP 18043197A JP 3755060 B2 JP3755060 B2 JP 3755060B2
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pipe
clamped
insertion port
pressing
fluid pressure
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JPH1110470A (en
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賢二 幅
則俊 鬼頭
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株式会社大同機械製作所
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Description

【0001】
【発明の属する技術分野】
この発明は、クランプ装置に関し、更に詳しくは、軸方向と直交する断面における外周形状が円形または多角形の被クランプ材を固定化保持するクランプ装置に関するものである。
【0002】
【従来の技術】
例えば、パイプ材の端面加工機であるパイプフェーサでは、回転刃具の回転軸の軸心と平行な方向から給材された被加工材(被クランプ材)である円筒状のパイプ材を、該回転刃具の正面でかつ被加工材の給材ラインに配設したクランプ装置で径方向および軸方向へのスライド移動と周方向への回動を不能に保持し、この状態において該パイプ材に所定の端面加工を施すようになっている。前記クランプ装置は、パイプ材の給材ラインを挟んで互いに近接・離間が可能に配設した2基のスライド体に、分割した2つのセグメントで構成されるアタッチメントの片方ずつを装着して対向的に位置させるよう構成される。また、両セグメントの対向面には、パイプ材の外周面に略一致する曲率に形成した半円状の凹部が形成されている。すなわち、一対のスライド体を相互に近接するよう移動し、アタッチメントの両セグメントをパイプ材の半径外方向から互いに近接させれば、両セグメントの凹部がパイプ材の外周面に当接して挟持し、当該パイプ材は径方向および軸方向へのスライド移動と周方向への回動が規制された状態で固定化保持される。なお、両セグメントの対向面に、V字形の凹部を形成した型式のアタッチメントを用いる例もある。
【0003】
【発明が解決しようとする課題】
前記クランプ装置では、加工対象とするパイプ材の外径(直径)に適合したアタッチメントを使用するので、該パイプ材を正確かつ確実に固定化保持し得る利点がある。しかるに前記パイプフェーサでは、外径(直径)が異なる複数種類のパイプ材を加工対象とするから、オーダ変更等により外径の異なるパイプ材を加工する際には、変更後のパイプ材の外径に適合する他のアタッチメントに交換しなければならない。すなわち、アタッチメントの交換作業にかなりの時間を要することから、オーダ変更に伴う段取り替え中は加工を停止せざるを得ず、サイクルタイムの短縮や加工コストの低減等の大きな障害となっていた。また、加工対象とするパイプ材の外径に応じて複数個のアタッチメントを準備しなければならず、これらアタッチメントの製作費用が極めて嵩むものになると共に、各アタッチメントの保管場所を確保しなければならない問題もある。しかも、このアタッチメントはかなりの重量物であるから、アタッチメントの自動交換装置等の付帯設備を設計,製作しなければならず、装置全体が大型化すると共に設備費の増加を伴う欠点を内在している。
【0004】
また、前述したように両セグメントの対向面にV字形の凹部を形成した型式のアタッチメントでは、パイプ材に対して各セグメントは2点で接触して保持するため、強固な保持力が得られず、該パイプの加工面にビビリが発生する問題がある。更に、パイプ材が薄肉の場合には、該パイプ材とセグメントとの接触部位が少ないために応力が集中して変形させてしまうおそれもある。
【0005】
【発明の目的】
本発明は、前述した課題を好適に解決するべく提案されたものであって、外周形状が円形または多角形の被クランプ材に対し半径外方向から近接・離間し得る多数個の押圧部材を円周状に配設し、被クランプ材の外径に応じて各押圧部材を選択的に近接させることで、外径の異なる複数種類の被クランプ材を好適に保持し得るようにしたクランプ装置を提供することを目的とする。
【0006】
【課題を解決するための手段】
前記課題を解決し、初期の目的を達成するため本発明は、
軸方向と直交する断面における外周形状が円形または多角形の被クランプ材を、固定解除可能に固定化保持するクランプ装置であって、
前記被クランプ材の軸方向からの挿通を許容する挿通口が形成された取付フレームと、
前記挿通口を囲んで取付フレームに放射状に配設され、制御装置で作動制御される複数基の作動手段と、
前記各作動手段に対応的に配設され、該作動手段の作動下に前記挿通口の中心部に対して近接離間移動し、その内側面を被クランプ材の外周面に当接可能な複数個の押圧部材とからなり、
前記制御装置により全ての作動手段を一方向へ作動制御して前記各押圧部材を半径外方向へ離間させた状態で、前記挿通口に被クランプ材を挿通し、この被クランプ材の外径に基いて適宜選択した前記作動手段を逆方向へ作動制御して対応の押圧部材を半径内方向へ近接させ、当該の被クランプ材の外周面に複数個の押圧部材を適宜間隔で均一的に押圧することで、該被クランプ材を固定化保持するよう構成したことを特徴とする。
【0007】
【発明の実施の形態】
次に、本発明に係るクランプ装置につき、好適な実施例を挙げて、添付図面を参照しながら以下説明する。なお本実施例では、クランプ装置を加工装置としてのパイプフェーサに付帯させ、このパイプフェーサが加工対象とする被クランプ材としてのパイプ材を所定位置で固定化保持する場合につき説明する。
【0008】
そこで、本実施例のクランプ装置の説明に先立ち、図1を基にして、実施例のパイプフェーサの構成につき要約説明する。なお説明の便宜上、図1における右側をパイプフェーサの前部、左側をパイプフェーサの後部とする。このパイプフェーサ10は、基本的な主要構成として、主軸(図示せず)を回転自在に支持する主軸台13が、フレーム11の長手方向に敷設したレール12上を摺動可能に配設されている。この主軸台13は、フレーム11の後端に配設したサーボモータ16に直結したボールネジ17と適宜螺合し、該サーボモータ16の回転駆動下に前記レール12に沿って前後にスライド移動するようになっている。また主軸台13の前方へ延出した主軸の前端部に面盤18が一体回転可能に配設されると共に、この面盤18に回転刃具15が着脱交換自在に取付けられている。そして、主軸台13の上部に配設した駆動モータ19のモータ軸に配設した駆動プーリ20と、主軸台13の後方へ延出した主軸の後端部に配設した従動プーリ21との間にタイミングベルト22が掛装され、該モータ19を回転駆動することで、該タイミングベルト22を介して前記面盤18および回転刃具15が回転するよう構成してある。またフレーム11の前端部には、本実施例に係るクランプ装置30を設置する設置台23が形成されている。
【0009】
前述の如く構成されたパイプフェーサ10に実施される本実施例のクランプ装置30は、図1および図2に示す如く、被クランプ材であるパイプ材50の挿通を許容する挿通口36を形成した取付フレーム31と、前記挿通口36を囲んで取付フレーム31に放射状に配設された複数基の流体圧シリンダ(作動手段)32と、各流体圧シリンダ32のロッド32aの先端に配設され、該流体圧シリンダ32の作動下に前記挿通口36の中心部に対して近接離間移動が可能な押圧部材33とから基本的に構成されている。
【0010】
前記取付フレーム31は縦断面L形に曲折成形され、その取着部34が前記設置台23の上面にボルト等で固定され、多角形(12角形)の前記挿通口36を形成した取付部35が垂直に立設した状態で配設されている。また挿通口36の端縁部には、該挿通口36に沿って12角形の筒状に突出した固定部37が取付部35から直角に延出しており、該固定部37に前記流体圧シリンダ32が取付けられている。なお、取付フレーム31における挿通口36の近傍には、図3に示す如く、該挿通口36に挿通されるパイプ材50の先端部の位置を検出すると共に該パイプ材50の外径(直径)を測定する適宜検出器(検出手段)38が配設されており、当該のパイプ材50に対する各検出信号を制御装置45に出力するようになっている。
【0011】
前記流体圧シリンダ32は、例えば油等を作動媒体とした複動式シリンダであり、本実施例のクランプ装置30では、合計12基の流体圧シリンダ32が、ヘット側を前記固定部37に取着してロッド32aを挿通口36の内側へ延出させた状態で配設されている。各流体圧シリンダ32は、12角形の前記固定部37の各直線部に固定されるので、結果的に中心角30度間隔の放射状に配設される。これら流体圧シリンダ32は、図3に示す如く、制御装置45により運転制御される油圧装置46に配管47を介して個別に接続されている。この油圧装置46には、前記各流体圧シリンダ32に接続した夫々の前記配管47に対応して切換弁48が配設されており、夫々の流体圧シリンダ32を選択的に作動制御し得るようになっている。
【0012】
例えば図3において、前記12基の流体圧シリンダ32を最上部から時計方向へ32A〜32Lと便宜的に符号を付して説明すると、前記制御装置45からの指令に基き全ての切換弁48を同期的に制御すれば、全ての流体圧シリンダ32A〜32Lが同期的に作動される。また、流体圧シリンダ32A,32C,32E,32G,32I,32Kに対応の切換弁48だけを制御すれば、これら流体圧シリンダ32A,32C,32E,32G,32I,32Kのみを選択的に作動させ得る。更に、流体圧シリンダ32A,32D,32G,32Jに対応の切換弁48だけを制御すれば、これら流体圧シリンダ32A,32D,32G,32Jのみを選択的に作動させ得る。このように本実施例のクランプ装置30では、12基の流体圧シリンダ32を制御装置45の指令に基き、適宜選択的に作動し得るよう構成されている。
【0013】
各流体圧シリンダ32におけるロッド32aの先端に配設された前記押圧部材33は、図5および図7等に示す如く、ロッド32aに取着される基部40と、該基部40の先端に一体的に形成された所要曲率で湾曲した押圧片41とからなる。この押圧片41の曲率は、例えば図5に示す如く、前記パイプフェーサ10が加工対象とする最小径のパイプ材50Aの外周面の曲率と同一か、若しくは僅かに小さくなるよう設定されている。従って図7に示す如く、前記最小径のパイプ材50Aより大径のパイプ材50Bの外周面に前記押圧片41が当接した際には、該押圧片41の中央部が非接触状態となり、該押圧片41は両端の押圧部42,42で該パイプ材50Bの外周面に当接する。そして各押圧部材33は、対応の流体圧シリンダ32をロッド32aが前進する方向へ付勢制御すれば、該ロッド32aの前進と共に給材ラインに近接してパイプ材50の外周面に当接して押圧し、また該流体圧シリンダ32をロッド32aが後退する方向へ付勢制御すれば、該ロッド32aの後退と共に給材ラインから離間するよう設定されている。
【0014】
【実施例の作用】
次に、前述のように構成した実施例に係るクランプ装置の作用につき、以下説明する。
【0015】
前記パイプ材50は、パイプフェーサ10に対して前側(図1の右側)から図示しない搬送装置で給送され、該パイプフェーサ10の前側に設置したクランプ装置30に近接する。このとき本実施例のクランプ装置30は、その初期状態として、図3に示す如く、前記制御装置45からの指令に基いて油圧装置46における全ての切換弁48が作動して、各流体圧シリンダ32はロッド32aが後退するよう付勢制御され、全ての押圧部材33を半径方向外方へ離間させた状態に停止している。
【0016】
前記クランプ装置30が初期状態で停止していることを前提として、パイプ材50を各押圧部材33の中央および前記取付フレーム31の挿通口36に挿通させると、該取付フレーム31に配設した検出器38が該パイプ材50の先端部を検出し、該検出器38による検出信号が前記制御装置45に出力されることにより、該パイプ材50は所定位置で停止される。このとき、前記検出器38が当該パイプ材50の外径寸法を計測し、その測定データも前記制御装置45へ出力される。
【0017】
本実施例のクランプ装置30では、取付フレーム31の挿通口36に挿通された状態で停止したパイプ材50の外径に基いて、前記12基の流体圧シリンダ32を選択的に作動させて、作動した流体圧シリンダ32に配設した押圧部材33により、当該パイプ材50を固定化保持するようになっている。例えば図4および図5に示す如く、パイプフェーサ10が加工対象とする最小径のパイプ材50Aに対しては、制御装置45により油圧装置46の切換弁48を制御して、6基の流体圧シリンダ32A,32C,32E,32G,32I,32Kを選択して同期制御し、該パイプ材50Aを固定化保持する。すなわち、各流体圧シリンダ32A,32C,32E,32G,32I,32Kをロッド32aが前進する方向へ付勢制御することにより、これら各ロッド32aに配設された6個の押圧部材33が相互に近接し、図5に示す如く、各押圧部材33の押圧片41がパイプ材50Aの外周に等間隔毎に当接する。従って、各押圧片41における両端の押圧部42,42(全部で12個所)が、パイプ材50Aの外周全周に亘って所定間隔で均一的に押圧されるようになるので、該パイプ材50Aは径方向および軸方向へのスライド移動と周方向への回動とが好適に規制され、正確かつ確実に固定化保持される。これにより、パイプ材50Aを回転刃具15で加工する場合に、該パイプ材50Aの加工面にビビリ等を生ずることなく、良好な加工面が得られる。
【0018】
また図6および図7に示す如く、所定径のパイプ材50Bに対しては、制御装置45により油圧装置46の切換弁48を制御して、12基全ての流体圧シリンダ32A〜32Lを作動制御して、該パイプ材50Bを固定化保持する。すなわち、全ての流体圧シリンダ32A〜32Lをロッド32aが前進する方向へ付勢制御することにより、これら各ロッド32aに配設した全ての押圧部材33が相互に近接し、図7に示す如く、各押圧部材33の押圧片41がパイプ材50Bの外周に等間隔毎に当接するようになる。従って、各押圧片41における両端の押圧部42,42(全部で24個所)が、パイプ材50Bの外周全周に亘って所定間隔で均一的に押圧されるようになるので、該パイプ材50Bは径方向および軸方向へのスライド移動と周方向への回動とが好適に規制され、正確かつ確実に固定化保持される。
【0019】
なお、パイプ材50の外径が前記パイプ材50Bの外径よりも小さい場合には、12基全ての流体圧シリンダ32をロッド32aが前進する方向へ作動すると、各押圧部材33の押圧片41同志が干渉してしまうので、前記パイプ材50Aの如く、6基の流体圧シリンダ32を選択して付勢制御し、6個の押圧部材33で該パイプ材50を固定化保持する。また、パイプ材50の外径が前記パイプ材50Bの外径よりも大きい場合には、該パイプ材50Bの如く、12基全ての流体圧シリンダ32A〜32Lをロッド32aが前進する方向へ付勢制御し、全ての押圧部材33で該パイプ材50を固定化保持する。
【0020】
前記実施例において、パイプフェーサ10が加工対象とする最小径のパイプ材50Aと、パイプ材50Bより外径が小さいパイプ材50に対しては、6基の流体圧シリンダ32A,32C,32E,32G,32I,32Kを選択的に作動制御して該パイプ材50を固定化保持するように例示したが、他の6基の流体圧シリンダ32B,32D,32F,32H,32J,32Lを選択的に作動制御して該パイプ材50を固定化保持するようにしてもよい。また、パイプフェーサ10が加工対象とする全てのパイプ材50に対する固定化保持は、前記6基または12基の流体圧シリンダ32を選択的に同期制御する場合を例示したが、例えば4基または3基の流体圧シリンダ32のみを選択的に同期制御して、対応の押圧部材33だけで該パイプ材50を押圧して固定化保持することも可能である。
【0021】
本実施例のクランプ装置30では、ロッド32aを半径方向内方へ指向させた複数の流体圧シリンダ32を放射状に配設し、各流体圧シリンダ32におけるロッド32aの先端に押圧部材33を配設して構成したので、パイプ材50の固定化保持については、複数の押圧部材33を半径方向外方から所定間隔毎に当接させ、該パイプ材50の外径全周に亘って該押圧部材33で均一的に押圧するようになる。従って、押圧不良によって起こるパイプ材50の不適切な変形や、固定不良によって加工時に起こる該パイプ材50の振動等の不都合を好適に防止し得る。
【0022】
図8は、クランプ装置30における押圧部材33の変形例を示すものであって、各流体圧シリンダ32におけるロッド32aの先端に、パイプ材50の軸方向に所定長さで延在する基部52の中央が連結されている。この基部52のパイプ材50を指向する内側面には、該パイプ材50の軸方向に離間して1対の押圧片54,54が配設されている。また基部52の外側面には、固定部37に摺動自在に挿通された1対のガイドロッド56,56が配設され、基部52はガイドロッド56,56に案内された状態で半径方向に進退移動するよう構成される。すなわち、図8に示す押圧部材33では、パイプ材50の外周に対して軸方向に離間する2個所で押圧片54,54が夫々当接して保持するよう構成される。
【0023】
前述した実施例では、取付フレームに12基の作動部材を配設した場合につき説明したが、本願はこれに限定されるものでなく、作動部材の配設数は任意に設定することができる。また被クランプ材の外径に関しては、パイプフェーサ側の制御手段に予め入力されたデータを用いることも可能である。更に、本発明に係るクランプ装置は、実施例に示すパイプフェーサで加工されるパイプ材をクランプするのに使用されるだけではなく、各種の加工装置において被クランプ材の外径が変化するものに使用可能である。なお、被クランプ材としてはパイプに限らず中実な棒状材料等であってもよいことは勿論である。
【0024】
【発明の効果】
以上説明した如く、本発明に係るクランプ装置によれば、外周形状が円形または多角形の被クランプ材に対し、半径方向外方に放射状に複数個の押圧部材を配置し、各押圧部材を対応の作動手段で半径方向内方へ移動可能に構成した。そして、各作動手段を制御装置で作動制御するよう構成したので、夫々の作動手段を選択的に作動制御することにより、被クランプ材の外径に応じて相互に近接する押圧部材の数を変更し得る。すなわち、小径の被クランプ材の場合は少数の押圧部材で固定化保持すると共に、大径の被クランプ材の場合は多数の押圧部材で固定化保持することができる。従って、被クランプ材の外径に応じたアタッチメントが必要なく、またアタッチメントの自動交換装置等の付帯設備も必要ないから、クランプ装置を小型化し得ると共に製作コストを大幅に低減し得る利点がある。
【0025】
更に、オーダ変更に伴って被クランプ材の外径が変わった場合には、制御装置により作動手段を選択的に作動させるだけで簡単かつ迅速に対応し得るから、段取り作業および段取り時間を不要としてサイクルタイムの大幅な短縮と、被クランプ材の加工コストの低減を可能とする等の極めて有益な効果を奏する。しかも、被クランプ材に対して複数の押圧部材で保持するのでその接触部位は多く、薄肉の被クランプ材を変形させることなく固定化保持することができる。また被クランプ材を強力に保持し得るので、該クランプ材を加工する場合にはその加工面にビビリ等を生じさせるのを防止し得る。
【図面の簡単な説明】
【図1】本発明に係るクランプ装置を設置するパイプフェーサを概略で示す側面図である。
【図2】本発明に係るクランプ装置を設置するパイプフェーサを概略で示す正面図である。
【図3】本発明の実施例に係るクランプ装置の概略構成図である。
【図4】パイプフェーサの加工対象である最小径のパイプ材を固定化保持するために、押圧部材を選択的に相互に近接させる状態を示す作動状態図である。
【図5】最小径のパイプ材の外周面に押圧部材が当接して該パイプ材を固定化保持した状態を示す説明図である。
【図6】所定径のパイプ材を固定化保持するために、全ての押圧部材を相互に近接させる状態を示す作動状態図である。
【図7】所定径のパイプ材の外周面に全ての押圧部材が当接して該パイプ材を固定化保持した状態を示す説明図である。
【図8】実施例に係る押圧部材の変形例を示す要部概略構成図である。
【符号の説明】
31 取付フレーム
32 流体圧シリンダ(作動手段)
33 押圧部材
36 挿通口
45 制御装置
38 検出手段
50 被クランプ材
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a clamp device, and more particularly to a clamp device that holds and holds a clamped material having a circular or polygonal outer peripheral shape in a cross section orthogonal to the axial direction.
[0002]
[Prior art]
For example, in a pipe facer that is a pipe material end face processing machine, a cylindrical pipe material that is a workpiece (clamped material) fed from a direction parallel to the axis of the rotary shaft of the rotary cutter is used as the rotary cutter. The clamp device disposed in front of the workpiece and on the workpiece supply line holds the sliding movement in the radial direction and the axial direction and the rotation in the circumferential direction in an incapable state. It is designed to be processed. The clamp device is mounted so that one of each of two divided segments is attached to two slide bodies arranged so as to be close to and separated from each other across a pipe material supply line. Configured to be located in Moreover, the semicircular recessed part formed in the curvature which substantially corresponds to the outer peripheral surface of a pipe material is formed in the opposing surface of both segments. That is, if a pair of slide bodies are moved close to each other and both segments of the attachment are brought close to each other from the outside of the radius of the pipe material, the concave portions of both segments abut against the outer peripheral surface of the pipe material, The pipe material is fixedly held in a state where sliding movement in the radial direction and axial direction and rotation in the circumferential direction are restricted. There is also an example of using a type of attachment in which V-shaped concave portions are formed on the opposing surfaces of both segments.
[0003]
[Problems to be solved by the invention]
The clamp device uses an attachment adapted to the outer diameter (diameter) of the pipe material to be processed, so that there is an advantage that the pipe material can be fixed and held accurately and reliably. However, in the pipe facer, since plural types of pipe materials having different outer diameters (diameters) are to be processed, when processing pipe materials having different outer diameters by changing the order, the outer diameter of the pipe material after the change is set. It must be replaced with another compatible attachment. That is, since a considerable amount of time is required for the attachment replacement work, the machining must be stopped during the setup change accompanying the order change, which has been a major obstacle to shortening the cycle time and reducing the machining cost. In addition, a plurality of attachments must be prepared according to the outer diameter of the pipe material to be processed, and the production cost of these attachments becomes extremely high, and a storage place for each attachment must be secured. There is also a problem. Moreover, since this attachment is quite heavy, it is necessary to design and manufacture ancillary equipment such as an automatic attachment changer, which has the disadvantage of increasing the overall size and increasing the equipment cost. Yes.
[0004]
In addition, as described above, in the type of attachment in which the V-shaped concave portions are formed on the opposing surfaces of both segments, each segment contacts and holds the pipe material at two points, so that a strong holding force cannot be obtained. There is a problem that chattering occurs on the processed surface of the pipe. Further, when the pipe material is thin, there is a possibility that stress concentrates and deforms because there are few contact portions between the pipe material and the segment.
[0005]
OBJECT OF THE INVENTION
The present invention has been proposed in order to suitably solve the above-described problems, and a plurality of pressing members that can approach and separate from a radially outward direction with respect to a clamped material having a circular or polygonal outer periphery. A clamping device that is arranged in a circumferential shape and that can selectively hold a plurality of types of clamped materials having different outer diameters by selectively bringing the pressing members close to each other according to the outer diameter of the clamped material. The purpose is to provide.
[0006]
[Means for Solving the Problems]
In order to solve the above problems and achieve the initial object, the present invention provides:
A clamp device that holds and holds a clamped material having a circular or polygonal outer peripheral shape in a cross section orthogonal to the axial direction so as to be unlockable,
An attachment frame formed with an insertion port allowing insertion of the clamped material from the axial direction;
A plurality of actuating means disposed radially on the mounting frame surrounding the insertion opening and controlled by a control device;
Plurally arranged corresponding to each actuating means, moved close to and away from the central portion of the insertion port under the action of the actuating means, and capable of abutting the inner surface thereof against the outer peripheral surface of the clamped material A pressing member,
In a state in which all the operating means are controlled in one direction by the control device and the respective pressing members are spaced radially outward, a material to be clamped is inserted into the insertion port, and the outer diameter of the material to be clamped is set. The operation means appropriately selected based on the operation direction is controlled in the reverse direction so that the corresponding pressing members are brought closer to each other in the radial inner direction, and a plurality of pressing members are uniformly pressed at appropriate intervals on the outer peripheral surface of the clamped material. Thus, the clamped material is configured to be fixedly held.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, a preferred embodiment of the clamping device according to the present invention will be described below with reference to the accompanying drawings. In the present embodiment, a case will be described in which a clamp device is attached to a pipe facer as a processing device, and the pipe material as a clamped material to be processed is fixed and held at a predetermined position by the pipe facer.
[0008]
Therefore, prior to the description of the clamping device of the present embodiment, the configuration of the pipe facer of the embodiment will be briefly described with reference to FIG. For convenience of explanation, the right side in FIG. 1 is the front part of the pipe facer, and the left side is the rear part of the pipe facer. In this pipe facer 10, as a basic main configuration, a headstock 13 that rotatably supports a main shaft (not shown) is slidably disposed on a rail 12 laid in the longitudinal direction of the frame 11. . The head stock 13 is appropriately screwed with a ball screw 17 directly connected to a servo motor 16 disposed at the rear end of the frame 11 so as to slide back and forth along the rail 12 under the rotational drive of the servo motor 16. It has become. A face plate 18 is disposed at the front end of the spindle extending forward of the headstock 13 so as to be integrally rotatable, and a rotary blade 15 is attached to the face plate 18 so as to be detachable and replaceable. And between the drive pulley 20 arrange | positioned at the motor shaft of the drive motor 19 arrange | positioned at the upper part of the spindle stock 13, and the driven pulley 21 arrange | positioned at the rear-end part of the spindle extended to the back of the spindle stock 13. The timing belt 22 is hooked on the motor 19, and the face plate 18 and the rotary blade 15 are rotated via the timing belt 22 by rotationally driving the motor 19. An installation base 23 on which the clamp device 30 according to this embodiment is installed is formed at the front end of the frame 11.
[0009]
As shown in FIGS. 1 and 2, the clamping device 30 of the present embodiment implemented in the pipe facer 10 configured as described above is provided with an insertion port 36 that allows insertion of a pipe material 50 that is a clamped material. A plurality of fluid pressure cylinders (actuating means) 32 radially disposed on the mounting frame 31 surrounding the insertion port 36, and a rod 32a of each fluid pressure cylinder 32; It is basically composed of a pressing member 33 capable of moving close to and away from the center of the insertion port 36 under the operation of the fluid pressure cylinder 32.
[0010]
The mounting frame 31 is bent to have a longitudinal cross-section L shape, and its attachment portion 34 is fixed to the upper surface of the installation base 23 with bolts or the like to form a polygonal (decagonal) insertion port 36. Are arranged vertically. A fixing portion 37 projecting in a dodecagonal tube shape along the insertion port 36 extends from the mounting portion 35 at a right angle at the end edge portion of the insertion port 36, and the fluid pressure cylinder is connected to the fixing portion 37. 32 is attached. As shown in FIG. 3, the position of the tip of the pipe member 50 inserted through the insertion port 36 is detected in the vicinity of the insertion port 36 in the mounting frame 31 and the outer diameter (diameter) of the pipe member 50 is detected. A detector (detection means) 38 is disposed as appropriate for measuring the above-described values, and each detection signal for the pipe material 50 is output to the control device 45.
[0011]
The fluid pressure cylinders 32 are, for example, double acting cylinders using oil or the like as a working medium. In the clamping device 30 of this embodiment, a total of 12 fluid pressure cylinders 32 are attached to the fixing portion 37 on the head side. The rod 32a is attached to the inside of the insertion opening 36 and is disposed. Since each fluid pressure cylinder 32 is fixed to each linear portion of the dodecagonal fixing portion 37, the fluid pressure cylinders 32 are arranged radially at intervals of 30 degrees as a result. As shown in FIG. 3, these fluid pressure cylinders 32 are individually connected to a hydraulic device 46 that is controlled by a control device 45 via a pipe 47. The hydraulic device 46 is provided with switching valves 48 corresponding to the pipes 47 connected to the fluid pressure cylinders 32 so that the fluid pressure cylinders 32 can be selectively controlled. It has become.
[0012]
For example, in FIG. 3, the 12 fluid pressure cylinders 32 will be described with reference numerals 32A to 32L in the clockwise direction from the top for convenience, and all the switching valves 48 are controlled based on commands from the control device 45. If controlled synchronously, all the fluid pressure cylinders 32A to 32L are operated synchronously. Further, if only the switching valve 48 corresponding to the fluid pressure cylinders 32A, 32C, 32E, 32G, 32I, 32K is controlled, only these fluid pressure cylinders 32A, 32C, 32E, 32G, 32I, 32K are selectively operated. obtain. Furthermore, if only the switching valve 48 corresponding to the fluid pressure cylinders 32A, 32D, 32G, 32J is controlled, only these fluid pressure cylinders 32A, 32D, 32G, 32J can be selectively operated. As described above, the clamping device 30 according to the present embodiment is configured so that the twelve fluid pressure cylinders 32 can be selectively operated as appropriate based on commands from the control device 45.
[0013]
The pressing member 33 disposed at the tip of the rod 32a in each fluid pressure cylinder 32 is integrated with the base 40 attached to the rod 32a and the tip of the base 40 as shown in FIGS. And a pressing piece 41 curved with a required curvature. For example, as shown in FIG. 5, the curvature of the pressing piece 41 is set to be the same as or slightly smaller than the curvature of the outer peripheral surface of the pipe member 50 </ b> A having the smallest diameter that is to be processed by the pipe facer 10. Therefore, as shown in FIG. 7, when the pressing piece 41 comes into contact with the outer peripheral surface of the pipe material 50B having a diameter larger than that of the minimum diameter pipe material 50A, the central portion of the pressing piece 41 is brought into a non-contact state. The pressing piece 41 comes into contact with the outer peripheral surface of the pipe member 50B at the pressing portions 42 and 42 at both ends. Each pressing member 33 abuts on the outer peripheral surface of the pipe member 50 in close proximity to the feed line as the rod 32a advances when the corresponding fluid pressure cylinder 32 is biased and controlled in the direction in which the rod 32a advances. The pressure cylinder 32 is set so as to move away from the supply line as the rod 32a moves backward when the fluid pressure cylinder 32 is biased and controlled so that the rod 32a moves backward.
[0014]
[Effect of the embodiment]
Next, the operation of the clamping device according to the embodiment configured as described above will be described below.
[0015]
The pipe member 50 is fed from the front side (right side in FIG. 1) to the pipe facer 10 by a conveying device (not shown) and close to the clamp device 30 installed on the front side of the pipe facer 10. At this time, as shown in FIG. 3, the clamping device 30 of the present embodiment is operated in the initial state by operating all the switching valves 48 in the hydraulic device 46 on the basis of a command from the control device 45. The biasing control 32 is performed so that the rod 32a moves backward, and all the pressing members 33 are stopped in a state where they are separated outward in the radial direction.
[0016]
Assuming that the clamping device 30 is stopped in the initial state, when the pipe member 50 is inserted through the center of each pressing member 33 and the insertion opening 36 of the attachment frame 31, the detection provided on the attachment frame 31 is detected. The pipe 38 detects the tip of the pipe material 50, and a detection signal from the detector 38 is output to the control device 45, whereby the pipe 50 is stopped at a predetermined position. At this time, the detector 38 measures the outer diameter of the pipe member 50, and the measurement data is also output to the control device 45.
[0017]
In the clamping device 30 of the present embodiment, the twelve fluid pressure cylinders 32 are selectively operated based on the outer diameter of the pipe member 50 stopped in a state of being inserted into the insertion port 36 of the mounting frame 31. The pipe member 50 is fixed and held by the pressing member 33 disposed in the operated fluid pressure cylinder 32. For example, as shown in FIGS. 4 and 5, for the pipe material 50A having the minimum diameter to be machined by the pipe facer 10, the switching valve 48 of the hydraulic device 46 is controlled by the control device 45 so that six hydraulic cylinders are provided. 32A, 32C, 32E, 32G, 32I, and 32K are selected and synchronously controlled, and the pipe material 50A is fixedly held. That is, by controlling the urging of the fluid pressure cylinders 32A, 32C, 32E, 32G, 32I, and 32K in the direction in which the rod 32a advances, the six pressing members 33 disposed on the rods 32a are mutually connected. As shown in FIG. 5, the pressing pieces 41 of the pressing members 33 come into contact with the outer periphery of the pipe member 50A at equal intervals. Accordingly, the pressing portions 42 and 42 (12 portions in total) at both ends of each pressing piece 41 are uniformly pressed at predetermined intervals over the entire outer periphery of the pipe material 50A. The sliding movement in the radial direction and the axial direction and the rotation in the circumferential direction are preferably restricted, and are fixed and held accurately and reliably. Thereby, when processing the pipe material 50A with the rotary blade 15, a good processed surface can be obtained without causing chatter or the like on the processed surface of the pipe material 50A.
[0018]
Further, as shown in FIGS. 6 and 7, for the pipe member 50B having a predetermined diameter, the control device 45 controls the switching valve 48 of the hydraulic device 46 to control the operation of all 12 fluid pressure cylinders 32A to 32L. Then, the pipe material 50B is fixed and held. That is, by controlling the urging of all the fluid pressure cylinders 32A to 32L in the direction in which the rod 32a advances, all the pressing members 33 disposed on each of the rods 32a are close to each other, as shown in FIG. The pressing piece 41 of each pressing member 33 comes into contact with the outer periphery of the pipe member 50B at equal intervals. Accordingly, the pressing portions 42 and 42 (24 locations in total) at both ends of each pressing piece 41 are uniformly pressed at predetermined intervals over the entire outer periphery of the pipe material 50B. The sliding movement in the radial direction and the axial direction and the rotation in the circumferential direction are preferably restricted, and are fixed and held accurately and reliably.
[0019]
When the outer diameter of the pipe material 50 is smaller than the outer diameter of the pipe material 50B, when all the 12 fluid pressure cylinders 32 are actuated in the direction in which the rod 32a advances, the pressing pieces 41 of the pressing members 33 are used. Since both parties interfere with each other, the six fluid pressure cylinders 32 are selected and biased and controlled as in the pipe member 50A, and the pipe member 50 is fixedly held by the six pressing members 33. Further, when the outer diameter of the pipe member 50 is larger than the outer diameter of the pipe member 50B, all twelve fluid pressure cylinders 32A to 32L are urged in the direction in which the rod 32a advances as in the pipe member 50B. The pipe member 50 is fixed and held by all the pressing members 33.
[0020]
In the above embodiment, the six fluid pressure cylinders 32A, 32C, 32E, 32G, and the like are used for the pipe member 50A having the smallest diameter to be processed by the pipe facer 10 and the pipe member 50 having an outer diameter smaller than that of the pipe member 50B. Although the pipe material 50 is fixed and controlled by selectively operating the 32I and 32K, the other six fluid pressure cylinders 32B, 32D, 32F, 32H, 32J, and 32L are selectively operated. The pipe material 50 may be fixed and held by controlling. Further, the fixing and holding of all the pipe members 50 to be processed by the pipe facer 10 is exemplified by the case where the six or twelve fluid pressure cylinders 32 are selectively controlled synchronously. It is also possible to selectively control only the fluid pressure cylinder 32 and to press and hold the pipe member 50 by the corresponding pressing member 33 alone.
[0021]
In the clamping device 30 of the present embodiment, a plurality of fluid pressure cylinders 32 in which the rods 32a are directed radially inward are disposed radially, and a pressing member 33 is disposed at the tip of the rod 32a in each fluid pressure cylinder 32. Since the pipe member 50 is fixed and held, the plurality of pressing members 33 are brought into contact with each other at predetermined intervals from the outside in the radial direction, and the pressing members are arranged over the entire outer circumference of the pipe member 50. At 33, the pressure is evenly pressed. Accordingly, it is possible to suitably prevent inconveniences such as inappropriate deformation of the pipe member 50 caused by defective pressing and vibration of the pipe member 50 occurring during processing due to improper fixing.
[0022]
FIG. 8 shows a modified example of the pressing member 33 in the clamping device 30, and the base 52 extending at a predetermined length in the axial direction of the pipe member 50 at the tip of the rod 32 a in each fluid pressure cylinder 32. The center is connected. A pair of pressing pieces 54, 54 are disposed on the inner surface of the base portion 52 facing the pipe member 50 so as to be spaced apart from each other in the axial direction of the pipe member 50. In addition, a pair of guide rods 56 and 56 slidably inserted into the fixed portion 37 are disposed on the outer surface of the base 52, and the base 52 is guided in the radial direction while being guided by the guide rods 56 and 56. Configured to move forward and backward. That is, the pressing member 33 shown in FIG. 8 is configured such that the pressing pieces 54 and 54 are in contact with each other and held at two positions spaced apart in the axial direction with respect to the outer periphery of the pipe member 50.
[0023]
In the above-described embodiment, the case where twelve operating members are disposed on the attachment frame has been described. However, the present application is not limited to this, and the number of the operating members disposed can be arbitrarily set. Further, regarding the outer diameter of the clamped material, it is possible to use data input in advance to the control means on the pipe facer side. Furthermore, the clamping device according to the present invention is not only used for clamping the pipe material processed by the pipe facer shown in the embodiment, but also used for various processing devices whose outer diameter of the clamped material is changed. Is possible. Needless to say, the material to be clamped is not limited to a pipe but may be a solid rod-like material or the like.
[0024]
【The invention's effect】
As described above, according to the clamping device according to the present invention, a plurality of pressing members are arranged radially outwardly with respect to a clamped material having a circular or polygonal outer periphery, and each pressing member corresponds to the clamping device. It is configured to be movable inward in the radial direction by the actuating means. And since each actuating means is configured to be actuated and controlled by the control device, the number of pressing members adjacent to each other is changed by selectively controlling the actuating means according to the outer diameter of the clamped material. Can do. That is, in the case of a clamped material with a small diameter, it can be fixed and held with a small number of pressing members, and in the case of a clamped material with a large diameter, it can be fixed and held with a large number of pressing members. Accordingly, there is no need for an attachment according to the outer diameter of the clamped material, and there is no need for incidental equipment such as an automatic attachment changing device, so that there is an advantage that the clamping device can be miniaturized and the manufacturing cost can be greatly reduced.
[0025]
Furthermore, if the outer diameter of the clamped material changes with the order change, it can be dealt with simply and quickly simply by selectively actuating the actuating means with the control device, eliminating the need for setup work and setup time. There are extremely beneficial effects such as a significant reduction in cycle time and a reduction in the processing cost of the clamped material. And since it hold | maintains with a several press member with respect to a to-be-clamped material, the contact part is many, and it can fix-hold without deform | transforming a thin to-be-clamped material. In addition, since the clamped material can be held strongly, it is possible to prevent chattering and the like from being generated on the processed surface when the clamp material is processed.
[Brief description of the drawings]
FIG. 1 is a side view schematically showing a pipe facer on which a clamping device according to the present invention is installed.
FIG. 2 is a front view schematically showing a pipe facer in which a clamp device according to the present invention is installed.
FIG. 3 is a schematic configuration diagram of a clamp device according to an embodiment of the present invention.
FIG. 4 is an operation state diagram showing a state in which pressing members are selectively brought close to each other in order to fix and hold a pipe member having a minimum diameter, which is a processing object of a pipe facer.
FIG. 5 is an explanatory view showing a state in which a pressing member comes into contact with an outer peripheral surface of a pipe material having a minimum diameter and the pipe material is fixedly held.
FIG. 6 is an operation state diagram showing a state in which all pressing members are brought close to each other in order to fix and hold a pipe member having a predetermined diameter.
FIG. 7 is an explanatory view showing a state in which all the pressing members are in contact with the outer peripheral surface of a pipe member having a predetermined diameter and the pipe member is fixedly held.
FIG. 8 is a schematic configuration diagram of a main part showing a modification of the pressing member according to the embodiment.
[Explanation of symbols]
31 Mounting frame 32 Fluid pressure cylinder (actuating means)
33 Pressing member 36 Insertion port 45 Control device 38 Detection means 50 Clamped material

Claims (2)

軸方向と直交する断面における外周形状が円形または多角形の被クランプ材(50)を、固定解除可能に固定化保持するクランプ装置であって、
前記被クランプ材(50)の軸方向からの挿通を許容する挿通口(36)が形成された取付フレーム(31)と、
前記挿通口(36)を囲んで取付フレーム(31)に放射状に配設され、制御装置(45)で作動制御される複数基の作動手段(32)と、
前記各作動手段(32)に対応的に配設され、該作動手段(32)の作動下に前記挿通口(36)の中心部に対して近接離間移動し、その内側面を被クランプ材(50)の外周面に当接可能な複数個の押圧部材(33)とからなり、
前記制御装置(45)により全ての作動手段(32)を一方向へ作動制御して前記各押圧部材(33)を半径外方向へ離間させた状態で、前記挿通口(36)に被クランプ材(50)を挿通し、この被クランプ材(50)の外径に基いて適宜選択した前記作動手段(32)を逆方向へ作動制御して対応の押圧部材(33)を半径内方向へ近接させ、当該の被クランプ材(50)の外周面に複数個の押圧部材(33)を適宜間隔で均一的に押圧することで、該被クランプ材(50)を固定化保持するよう構成した
ことを特徴とするクランプ装置。
A clamp device that holds and holds a clamped material (50) whose outer peripheral shape in a cross section perpendicular to the axial direction is circular or polygonal so that it can be fixed and released.
An attachment frame (31) formed with an insertion port (36) that allows insertion of the clamped material (50) from the axial direction;
A plurality of actuating means (32) disposed radially on the mounting frame (31) surrounding the insertion port (36) and controlled by the control device (45);
Corresponding to each actuating means (32), it moves close to and away from the central portion of the insertion port (36) under the action of the actuating means (32), and its inner side surface is clamped ( 50) a plurality of pressing members (33) capable of abutting on the outer peripheral surface,
In the state where all the operating means (32) are controlled in one direction by the control device (45) and the pressing members (33) are separated in the radially outward direction, a material to be clamped is inserted into the insertion port (36) (50) is inserted, and the operation means (32) appropriately selected based on the outer diameter of the clamped material (50) is controlled to operate in the reverse direction, and the corresponding pressing member (33) is moved inward in the radial direction And configured to hold the clamped material (50) fixedly by pressing the plurality of pressing members (33) uniformly at appropriate intervals on the outer peripheral surface of the clamped material (50). A clamping device characterized by the above.
前記挿通口(36)の近傍には、該挿通口(36)を通過する被クランプ材(50)の外径を検出する検出手段(38)が配設され、この検出手段(38)からの検出信号を前記制御装置(45)に出力することにより、被クランプ材(50)の外径に応じて前記各作動手段(32)を選択的に作動制御するようにした請求項1記載のクランプ装置。In the vicinity of the insertion port (36), a detection means (38) for detecting the outer diameter of the clamped material (50) passing through the insertion port (36) is disposed, and the detection means (38) The clamp according to claim 1, wherein the operation means (32) is selectively controlled according to the outer diameter of the clamped material (50) by outputting a detection signal to the control device (45). apparatus.
JP18043197A 1997-06-20 1997-06-20 Clamping device Expired - Lifetime JP3755060B2 (en)

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JP18043197A JP3755060B2 (en) 1997-06-20 1997-06-20 Clamping device

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Application Number Priority Date Filing Date Title
JP18043197A JP3755060B2 (en) 1997-06-20 1997-06-20 Clamping device

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JPH1110470A JPH1110470A (en) 1999-01-19
JP3755060B2 true JP3755060B2 (en) 2006-03-15

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Publication number Priority date Publication date Assignee Title
JP4859300B2 (en) * 2001-08-07 2012-01-25 三菱重工業株式会社 Steel pipe end face processing equipment
WO2006073121A1 (en) 2005-01-07 2006-07-13 Olympus Medical Systems Corp. Inserted part for endoscopes
JP2010194635A (en) * 2009-02-24 2010-09-09 Mitsubishi Heavy Ind Ltd Clamp device
KR101299280B1 (en) * 2011-09-28 2013-08-23 현대제철 주식회사 Steel materials fixed device
CN103009144B (en) * 2012-12-31 2015-01-07 苏州金纬机械制造有限公司 Follow-up clamping device
CN104259885B (en) * 2014-09-16 2017-01-25 芜湖市华益阀门制造有限公司 Location device for inner hole location fixture
CN105127781A (en) * 2015-08-25 2015-12-09 江苏裕隆锻造有限公司 Valve body machining tool
CN107234461A (en) * 2017-05-31 2017-10-10 南通不二环境科技有限公司 One kind processing inner hole device
CN107414672A (en) * 2017-08-30 2017-12-01 苏州昌田机械设备制造有限公司 A kind of auxiliary clamp for precise polished machine
CN109048635B (en) * 2018-08-10 2021-09-24 宁国市挚友合金钢材料有限公司 Spherical polishing device in steel ball cold heading mould
CN115415075B (en) * 2022-08-30 2023-10-03 浙江利永达制冷机械有限公司 Fixing device for valve machining
CN117086667B (en) * 2023-10-20 2024-02-27 西安大鹏航空科技有限公司 Clamping device for machining aviation thin-wall part

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