JP4618851B2

JP4618851B2 - Detachable speed-up truing device and grinder capable of mounting detachable speed-up truing device

Info

Publication number: JP4618851B2
Application number: JP2000194521A
Authority: JP
Inventors: 邦彦海野; 正人北島; 昇平岩; 雅和山口; 良平向井
Original assignee: Toyoda Van Moppes Ltd; JTEKT Corp
Current assignee: Toyoda Van Moppes Ltd; JTEKT Corp
Priority date: 2000-06-28
Filing date: 2000-06-28
Publication date: 2011-01-26
Anticipated expiration: 2020-06-28
Also published as: JP2002011658A

Description

【０００１】
本発明は、超砥粒砥石車をツルーイングする着脱式ツルーイング装置および着脱式ツルーイング装置を装着可能な研削盤に関するものである。
【０００２】
【従来の技術】
立方晶窒化硼素（ＣＢＮ）、ダイヤモンド等の超硬質材料を砥粒とする超砥粒砥石車をツルーイングする場合、超砥粒砥石車の切れ味を向上させるためにツルーイング工具の回転数をかなり高くする必要がある。さらに、最近開発が進んでいる超砥粒砥石車を用いた汎用研削盤においては、高速研削を行うために超砥粒砥石車の回転数が高くなっている。これに合わせてツルーイング工具の回転数を上げて超砥粒砥石車をツルーイングするために、超砥粒砥石車を用いた汎用研削盤において、ツルーイング工具を電動モータにより高速回転駆動するようにしたツルーイング装置をツルーイング時にワークテーブル又は主軸台に着脱自在に装着するようにしている。
【０００３】
【発明が解決しようとする課題】
上記従来のツルーイング装置では、ツルーイング工具を高速回転駆動するための電動モータを別途装備するので、装置自体が高価となり大型化し、ツルーイングのためにワークテーブル又は主軸台に着脱するのに多大の時間と労力を費やするという問題があった。
【０００４】
【課題を解決するための手段】
上記の課題を解決するため、請求項１に記載の発明の構成上の特徴は、研削盤の工作物支持装置に着脱可能に支持されるサポート軸と、このサポート軸に回転自在に支承された駆動部材と、前記サポート軸に回転可能に支承されツルーイング工具が取付けられる工具支持体と、この工具支持体と前記駆動部材間に介装され前記駆動部材の回転を増速して前記工具支持体に伝達する増速機構と、前記駆動部材を前記工作物支持装置の工作物駆動機構に連結する手段と、前記サポート軸を前記工作物支持装置に回転を規制して着脱自在に連結する回転規制手段と、を備えたことである。
【０００５】
請求項２に係る発明の構成上の特徴は、研削盤の工作物支持装置に着脱可能に支持されるサポート軸と、このサポート軸に回転自在に支承された駆動部材と、前記サポート軸に回転可能に支承された出力部材と、この出力部材と前記駆動部材間に介装され前記駆動部材の回転を増速して前記出力部材に伝達する増速機構と、前記サポート軸に回転可能に支承されツルーイング工具が取付けられる工具支持体と、前記出力部材の回転を前記工具支持体に伝達する継手手段と、前記駆動部材を前記工作物支持装置の工作物駆動機構に連結する手段と、前記サポート軸を前記工作物支持装置に回転を規制して着脱自在に連結する回転規制手段と、を備えたことである。
【０００６】
請求項３に係る発明の構成上の特徴は、請求項２に記載の着脱式増速ツルーイング装置において、前記継手手段は、前記出力部材に設けられた係合手段と前記工具支持体に設けられこの係合手段と回転方向で係合する当接手段とで構成したことである。
【０００７】
請求項４に係る発明の構成上の特徴は、請求項１乃至請求項３のいずれかに記載の着脱式増速ツルーイング装置において、前記増速機構は遊星歯車機構で構成されていることである。
【０００８】
請求項５に係る発明の構成上の特徴は、請求項１乃至請求項４のいずれかに記載の着脱式増速ツルーイング装置を装着可能な研削盤において、前記工作物支持装置は前記研削盤の主軸台と心押台であり、この主軸台と心押台との間に前記サポート軸を支持し、前記駆動部材を前記工作物支持装置の工作物駆動機構に連結する手段は、前記主軸台に支承されて回転駆動される回転部材と前記駆動部材とを着脱自在に連結する回転伝達手段であることである。
【０００９】
請求項６に係る発明の構成上の特徴は、請求項１乃至請求項４のいずれかに記載の着脱式増速ツルーイング装置を装着可能な研削盤において、前記工作物支持装置は前記研削盤の主軸台に軸承されて回転駆動される主軸に設けられた主軸センタと心押台であり、この主軸センタと心押台との間に前記サポート軸を支持し、前記駆動部材を前記工作物支持装置の工作物駆動機構に連結する手段は、前記主軸と前記駆動部材とを着脱自在に連結する回転伝達手段であることである。
【００１０】
請求項７に係る発明の構成上の特徴は、請求項１乃至請求項４のいずれかに記載の着脱式増速ツルーイング装置を装着可能な研削盤において、前記工作物支持装置は前記研削盤の主軸台に軸承されて回転駆動される主軸に装着されたチャックと心押台であり、このチャックで前記駆動部材を把持し、前記心押台により前記サポート軸の後端を支持し、前記駆動部材を前記工作物支持装置の工作物駆動機構に連結する手段は、前記駆動部材を着脱自在に把持する前記チャックであることである。
【００１１】
請求項８に係る発明の構成上の特徴は、請求項５乃至請求項７のいずれかに記載の着脱式増速ツルーイング装置を装着可能な研削盤において、前記サポート軸の回転を規制する手段は、前記サポート軸を前記心押台に回転を規制して着脱自在に連結する回転規制手段であることである。
【００１２】
請求項９に係る発明の構成上の特徴は、請求項５に記載の着脱式増速ツルーイング装置を装着可能な研削盤において、前記サポート軸の回転を規制する手段は、前記サポート軸を前記主軸台に回転を規制して着脱自在に連結する回転規制手段であることである。
【００１３】
請求項１０に係る発明の構成上の特徴は、主軸台と心押台との間で前記主軸台に対向して着脱自在に装備される補助支持台と、前記主軸台と前記補助支持台との間に着脱可能に支持されるサポート軸と、このサポート軸に回転自在に支承された駆動部材と、前記サポート軸に回転可能に支承されツルーイング工具が取付けられる工具支持体と、この工具支持体と前記駆動部材間に介装され前記駆動部材の回転を増速して前記工具支持体に伝達する増速機構と、前記駆動部材を前記主軸台の工作物駆動機構に連結する手段と、前記サポート軸を前記補助支持台に回転を規制して着脱自在に連結する回転規制手段と、を備えたことである。
【００１４】
【発明の作用・効果】
上記のように構成した請求項１に係る発明においては、研削盤の工作物支持装置に回転を規制して着脱可能に支持されたサポート軸に駆動部材と工具支持体とを回転自在に支承し、前記工作物支持装置の工作物駆動機構から前記駆動部材に伝達される回転を増速機構により増速して前記工具支持体に伝達し、前記工具支持体に取付けられたツルーイング工具により超砥粒砥石車をツルーイングするので、ツルーイング工具を回転駆動する電動モータを別途設けることなく、研削盤の工作物支持装置の工作物駆動機構によりツルーイング工具を高速回転させることができ、ツルーイング装置を小型にすることができてツルーイング時にツルーイング装置を研削盤に着脱することが極めて容易となり、特に、超砥粒砥石車を用いた汎用研削盤において切望されている安価且つ小型で簡便なツルーイング装置を提供することができる。
【００１５】
上記のように構成した請求項２に係る発明においては、研削盤の工作物支持装置に回転を規制して着脱可能に支持されたサポート軸に駆動部材と出力部材と工具支持体とを回転自在に支承し、前記工作物支持装置の工作物駆動機構から前記駆動部材に伝達される回転を増速機構により増速して前記出力部材に伝達し、出力部材の回転を継手手段を介して前記工具支持体伝達し、工具支持体に取付けられたツルーイング工具により超砥粒砥石車をツルーイングするので、請求項１に記載の発明の効果に加え、増速機構等の振動が工具支持体に伝達することを継手手段により遮断できて極めて高精度のツルーイングを行うことができる。
【００１６】
上記のように構成した請求項３に係る発明においては、出力部材に設けられた係合手段を工具支持体に設けられた当接手段に係合させて出力部材の回転を工具支持体に伝達するようにしているので、増速機構等の振動が工具支持体に伝達することを簡単な構成で効果的に遮断することができる。
【００１７】
上記のように構成した請求項４に係る発明においては、工作物支持装置の工作物駆動機構から駆動部材に伝達される回転を増速してツルーイング工具に伝達する増速機構を遊星歯車機構で構成したので、請求項１に記載の発明の効果に加え、簡単な機構でコンパクトなツルーイング装置を提供することができる。
【００１８】
上記のように構成した請求項５に係る発明においては、工作物を支持する主軸台と心押台との間にサポート軸を回転を規制して支持し、主軸台に支承されて回転駆動される回転部材から駆動部材に伝達される回転を増速機構により増速してツルーイング工具に伝達するようにしたので、ツルーイングのときのみツルーイング装置を研削盤の主軸台と心押台との間に簡単に取付けてツルーイング工具を高速回転駆動することができる。
【００１９】
上記のように構成した請求項６に係る発明においては、主軸台に軸承されて回転駆動される主軸に設けられた主軸センタと心押台との間にサポート軸を回転を規制して支持し、主軸から駆動部材に伝達される回転を増速機構により増速してツルーイング工具に伝達するようにしたので、ツルーイング装置の研削盤への着脱及びツルーイング工具の高速回転駆動が極めて容易となる。
【００２０】
上記のように構成した請求項７に係る発明においては、主軸に装着されたチャックと心押台とでサポート軸を支持し、主軸からチャックを介して駆動部材に伝達される回転を増速機構により増速してツルーイング工具に伝達するようにしたので、ツルーイング装置の研削盤への着脱及び主軸から駆動部材への回転の伝達が簡単であり、ツルーイング工具の高速回転駆動が極めて容易となる。
【００２１】
上記のように構成した請求項８に係る発明においては、主軸台と心押台との間に支持されるサポート軸の回転を心押台との連結で規制しているので、サポート軸の回転を広いスペースを確保することができる心押台側で簡単な構造で規制して、駆動部材の回転を増速機構で増速してツルーイング工具を高速回転駆動することができる。
【００２２】
上記のように構成した請求項９に係る発明においては、主軸台と心押台との間に支持されるサポート軸の回転を主軸台との連結で規制しているので、サポート軸の回転を簡単な構造で規制して、駆動部材の回転を増速機構で増速してツルーイング工具を高速回転駆動することができる。
【００２３】
上記のように構成した請求項１０に係る発明においては、主軸台と心押台との間に着脱自在に装備された補助支持台と主軸台とでサポート軸を回転を規制して支持し、主軸台の工作物駆動機構から駆動部材に伝達される回転を増速機構により増速して工具支持体に伝達し、工具支持体に取付けられたツルーイング工具により超砥粒砥石車をツルーイングするので、工作物の加工精度への影響が大きい心押台をツルーイング毎に移動させる必要がなくなり、ツルーイング装置着脱のための段取替えが簡単になる。
【００２４】
【実施の形態】
以下に本発明の実施の形態を図面に基づいて説明する。図１において、１０は一般的な汎用研削盤で、工作物支持装置１１に支持された工作物Ｗを超砥粒砥石車１２により研削加工するものである。この超砥粒砥石車１２のツルーイング時に、図２，３に示す本発明に係る着脱式増速ツルーイング装置１３が工作物支持装置１１に装着され、超砥粒砥石車１２をツルーイングするのである。１４はベッドで、このベッド１４上にテーブル１５が摺動自在に載置され、図略のサーボモータ及びボールネジ機構によりＺ軸方向に移動されるようになっている。テーブル１５上には、工作物支持装置１１としての主軸台１６及び心押台１７が互いに対向して固定され、主軸台１６及び心押台１７に設けられたセンタ１８，１９により工作物Ｗが両端をセンタ支持されている。主軸台１６には面板２０が回転可能に支承され、工作物Ｗは、工作物Ｗに取付けられたケレ２１と面板２０に固着されたケレ回し２２との係合により回転駆動されるようになっている。２３はベッド１４上にテーブル１５の摺動方向と直角なＸ軸方向に摺動可能に載置された砥石台で、図略のサーボモータ及びボールネジ機構により工作物Ｗに向かって進退移動されるようになっている。砥石台２３にはモータにより回転駆動される砥石軸２４が回転可能に軸承され、この砥石軸２４に超砥粒砥石車１２が取付けられている。超砥粒砥石車１２は、立方晶窒化硼素（ＣＢＮ）又はダイヤモンドなど超硬質材料の砥粒をビトリファイドボンド、レジノイドボンド又はメタルボンドで結合したものである。
【００２５】
図１，２に示すように、テーブル１５上に固定された主軸台本体２５に支持筒２６が一体的に固定され、この支持筒２６に回転部材としての面板２０がベアリング２８を介して回転可能に支承されている。この面板２０は主軸台本体２５上に取付けられたモータ２９によりプーリ２７とベルトを介して回転駆動されるようになっている。面板２０、プーリ２７及びモータ２９等により工作物駆動機構３０が構成されている。支持筒２６の先端にセンタ１８が嵌着され、面板２０から心押台１７に向かって突出している。３５はテーブル１５上に固定された心押台１７の本体で、この心押台本体３５に主軸台１６に向かってスプリングにより付勢されたスリーブ３６が回転を規制されて摺動可能に支承され、このスリーブ３６の先端にセンタ１９が嵌着されている。
【００２６】
本発明に係る着脱式増速ツルーイング装置１３は、そのサポート軸４０をセンタ１８，１９の間に両端支持され、駆動部材４１に取付けられたケレ４２と面板２０に固着したケレ回し２２との係合により駆動部材４１が回転駆動されるようになっている。ケレ４２及びケレ回し２２等により、駆動部材４１を工作物支持装置１１の工作物駆動機構３０に連結する手段、即ち主軸台１６に支承されて回転駆動される面板２０と駆動部材４１とを着脱自在に連結する回転伝達手段４３が構成されている。サポート軸４０の後端及びセンタ１９には、円筒状で長手方向にスリットが入れられた連結部材４４の両端部が夫々嵌合され、ネジ４５をスリットの隙間が小さくなるように締付けて連結部材４４をサポート軸４０とセンタ１９とに固定することによりサポート軸４０の回転を規制している。センタ１９、連結部材４４、ネジ４５等によりサポート軸４０の回転を規制する手段、即ちサポート軸４０を心押台１７に回転を規制して着脱自在に連結する回転規制手段４６が構成されている。
【００２７】
図３に示すように、着脱式増速ツルーイング装置１３のサポート軸４０には、カップ状の駆動部材４１が軸受５０により回転自在に支承されている。駆動部材４１の大径孔４７の段部には第一内歯歯車５１が嵌合され、大径孔４７に嵌合された環状部材４８がボルト４９により段部方向に締め上げられて第一内歯歯車５１を大径孔４７段部に押圧固定している。この第一内歯歯車５１に第一遊星歯車５２が噛合し、第一遊星歯車５２にサポート軸４０の軸線方向に突設された第一軸５４がサポート軸４０に設けられたフランジ５３に自由回転可能に支承されている。５６は内周を軸受５７によりサポート軸４０に、外周を軸受５８により環状部材４８の内周面に回転可能に支承された中間部材で、この中間部材５６の小径部に刻設された第一太陽歯車５９が第一遊星歯車５２に噛合している。中間部材５６には第二軸６０がサポート軸４０の軸線と平行な方向に自由回転可能に支承され、この第二軸６０に第二遊星歯車６１が一体に設けられている。駆動部材４１の大径孔４７の開口部には環状部材４８と並んで第二内歯歯車６２、蓋部材８０が嵌合され、蓋部材８０をボルト８１により環状部材４８に締め付けて第二内歯歯車６２を大径孔４７に固定している。この第二内歯歯車６２に第二遊星歯車６１が噛合されている。サポート軸４０には出力部材６３が軸受６４により回転可能に支承され、この出力部材６３に固定された第二太陽歯車６５が第二遊星歯車６１に噛合されている。
【００２８】
第一及び第二の内歯歯車、遊星歯車、太陽歯車５１，６２，５２，６１，５９，６５等からなる２段階の遊星歯車機構６６が、出力部材６３と駆動部材４１との間に介装された増速機構６７を構成する。例えば、内歯歯車５１，６２の歯数を９０、遊星歯車５２，６１の歯数を２０、太陽歯車５９，６５の歯数を５０とすると、増速機構６７により駆動部材４１の回転は、６．８４倍増速して出力部材６３に伝達される。増速機構６７は、遊星歯車機構６６に限ることなく、増速歯車列など公知の増速機構を使用してもよい。
【００２９】
８５はサポート軸４０に軸受８６により回転可能に支承された工具支持体で、継手手段８７を介して出力部材６３の回転が伝達されるようになっている。伝達手段８７は、図4に示すように、出力部材６３に突設された係合手段としての突起８８と工具支持体８５に設けられ突起８８が遊嵌する当接手段としての凹部８９とから構成され、出力部材６３の回転により突起８８が凹部８９の側壁に係合して出力部材６３の回転を工具支持体８５に伝達する。
【００３０】
工具支持体８５には、ツルーイング工具９０がボルト９１により取付けられている。立方晶窒化硼素（ＣＢＮ）砥粒の砥石車をツルーイングする場合は、ダイヤモンド砥粒をメタルボンドで結合した砥粒部分９２を有するツルーイング工具９０を工具支持体８５に取り付け、ダイヤモンド砥粒の砥石車をツルーイングする場合は、炭化珪素ＳｉＣをレジノイドボンド又はビトリファイドボンドで結合したＧＣ砥石からなるツルーイング工具９０を工具支持体８５に取付ける。ダイヤモンド砥粒のツルーイング工具としては、ダイヤモンド粒を円盤の幅方向に単列、半径方向に複数列円盤状に並べてメタルボンドで結合した砥粒部分を有するもの、多数のダイヤモンド粒を円盤の幅及び半径方向に分布させてメタルボンドで結合し、幅方向の両角部にＲ部を形成した砥粒部分を有するもの等を使用する。ＧＣ砥石からなるツルーイング工具は、その外周面形状をツルーイングされるダイヤモンド砥石車の外周形状に補合させた総型砥石としてもよい。９３はツルーイング工具９０の側面に取付けられた検出円盤で、外周に塗られた塗料が砥石車１２により僅かに削り取られることにより、砥石車１２の位置を検出するものである。
【００３１】
上記のように構成した実施形態においては、工作物Ｗを研削加工する場合、工作物Ｗを主軸台１６と心押台１７との間に両センタ１８，１９によりセンタ支持し、砥石台２３とテーブル１５とをＸ，Ｚ軸方向に相対移動させて工作物Ｗに砥石車１２により研削加工をおこなう。研削加工により超砥粒が摩耗、脱落した砥石車１２の研削面をツルーイングする場合、工作物Ｗに替えて着脱式増速ツルーイング装置１３のサポート軸４０を主軸台１６と心押台１７との間に両センタ１８，１９により支持する。着脱式増速ツルーイング装置１３の駆動部材４１に固定したケレ４２と主軸台１６の面板２０に突設したケレ回し２２とを係合させて面板２０と駆動部材４１とを回転連結する。サポート軸４０の後端及びセンタ１９には連結部材４４を嵌合させ、ネジ４５をスリットの隙間が小さくなるように締め付けてサポート軸４０を連結部材４４によりンタ１９に固定してサポート軸４０の回転を規制する。この状態で面板２０をモータ２９、ベルト及びプーリ２７を介して例えば、５００ｒｐｍで回転駆動すると、駆動部材４１も同じ回転数で回転され、出力部材６３は遊星歯車機構６６により回転数を６．８４倍増速されて３，４２０min^-1で回転駆動され、継手手段８７の突起８８が凹部８９の側壁に当接して工具支持体８５が出力部材６３と同じ回転数で回転駆動される。この状態で砥石台２３をＺ軸方向に前進させて砥石車１２をツルーイング工具９０に向かって一回のツルーイング切込み量だけ微少前進させ、テーブル１５をＺ軸方向にトラバース移動させて砥石車１２の研削面をツルーイング工具９０によりツルーイングする。この場合、砥石車１２とツルーイング工具９０の砥粒部分９２との衝突を避けるために、砥石車１２を検出円盤９３と対向させた状態で砥石車１２を前進させ、検出円盤９３に接触したことを検出円盤の外周に塗った塗料が僅かに削り取られたことにより検出するようにしてもよい。検出円盤９３の外径とツルーイング工具９０の砥粒部分９２の外径との差の半分が砥粒部分９２の砥石車１２への切込み量となる。
【００３２】
上記実施形態では、出力部材６３の回転を継手手段８７を介して工具支持体８５に伝達するようにしているが、出力部材６３と工具支持体８５とを一体にし、出力部材６３を工具支持体としてツルーイング工具９０を取付けるようにしてもよい。
【００３３】
上記実施形態では、連結部材４４をサポート軸４０とセンタ１９とに固定することによりサポート軸４０の回転を規制しているが、図５、図６に示すように主軸１６側のセンタ１８に二面取り９５を設け、この二面取り９５に僅かな隙間をもって勘合する軸端孔９６をサポート軸４０の主軸台１６側の端面に設け、この軸端孔９６の底面に穿設したセンタ穴９７とサポート軸後端のセンタ穴とにセンタ１８，１９を嵌合してサポート軸４０を支持し、二面取り９５と軸端孔９６との係合によりサポート軸４０を主軸台１６に着脱自在に連結して回転を規制するようにしてもよい。
【００３４】
上記実施形態においては、主軸台１６は、先端にセンタ１８が嵌着された支持筒２６が主軸台本体２５に一体的に固定され、この支持筒２６に面板２０が回転可能に支承されているが、主軸台７０は、図７に示すように、先端に主軸センタ７１が嵌着された主軸７２を主軸台本体７３に回転可能に軸承したものでもよい。この場合は、着脱式増速ツルーイング装置１３のサポート軸４０を主軸センタ７１と心押台１７のセンタ１９間にセンタ支持し、駆動部材４１をこれに取付けたケレ４２と主軸７２の端面に突設したケレ回し７４との係合により回転駆動する。サポート軸４０は連結部材４１によりセンタ１９に連結されて回転を規制されているので、サポート軸４０のセンタ穴と主軸センタ７１との間には相対回転が生じるが、ツルーイングの間だけであるので、グリース等で潤滑すれば問題はない。主軸センタ７１を先端部分が自由回転可能なリブセンタとしてもよい。
【００３５】
図８に示すように、主軸７２の端面にケレ回し７４に替えて三つ爪チャック９８を取付け、チャック９８で駆動部材４１を把持して回転駆動し、心押台１７のセンタ１９でサポート軸４０の後端をセンタ支持し、サポート軸４０を連結部材４１によりセンタ１９に連結して回転を規制するよにしてもよい。
【００３６】
また、上記実施形態では、心押台１７によりサポート軸４０の後端を支持しているので、同一種類の工作物Ｗを複数個連続して研削加工しているようなときは、ツルーイング毎に、工作物Ｗとサポート軸４０との長さの相違に合わせて心押台１７の位置調整を行う必要がある。この心押台１７の位置調整作業を緩和するために、図９に示すように、センタ７５を備えた軽量の補助支持台７６を主軸台１６に対向してテーブル１５上に着脱自在に装着し、着脱式増速ツルーイング装置１３のサポート軸４０を主軸台１６と補助支持台７６との間にセンタ１８，７５により支持するようにしてもよい。
【図面の簡単な説明】
【図１】本発明に係る着脱式増速ツルーイング装置を使用する汎用研削盤の正面図である。
【図２】本発明に係る着脱式増速ツルーイング装置を汎用研削盤の主軸台と心押台との間に両端支持した状態を示す図である。
【図３】本発明に係る着脱式増速ツルーイング装置の縦断面図である。
【図４】継手手段を示す拡大断面図である。
【図５】サポート軸を回転を規制して主軸台のセンタに連結する実施形態を示す図である。
【図６】図５の６−６線に沿って断面にした図である。
【図７】主軸台の他の実施形態を示す図である。
【図８】駆動部材をチャックで把持する実施形態を示す図である。
【図９】補助支持台サポート軸を支持する実施形態を示す図である。
【符号の説明】
１０…研削盤、１１…工作物支持装置、１２…超砥粒砥石車、１３…着脱式増速ツルーイング装置、１４…ベッド、１５…テーブル、１６，７０…主軸台、１７…心押台、１７，１９，７５…センタ、２０…面板（回転部材）、２２，７４…ケレ回し、２３…砥石台、３０…工作物駆動機構、４０…サポート軸、４１…駆動部材、４２…ケレ、４３…回転伝達手段、４６…回転規制手段、６３…出力部材、６６…遊星歯車機構、６７…増速機構、７１…主軸センタ、７２…主軸、７６…補助支持台、８５…工具支持体、８７…継手手段、８８…係合手段、８９…当接手段、９０…ツルーイング工具、９５…二面取り、９６…軸端孔、９８…チャック、Ｗ…工作物。[0001]
The present invention relates to a detachable truing device for truing a superabrasive grinding wheel and a grinder capable of mounting the detachable truing device .
[0002]
[Prior art]
When truing a superabrasive grinding wheel that uses super hard material such as cubic boron nitride (CBN) or diamond as the abrasive, the rotational speed of the truing tool is considerably increased in order to improve the sharpness of the superabrasive grinding wheel. There is a need. Further, in a general-purpose grinding machine using a superabrasive grinding wheel that has been developed recently, the rotational speed of the superabrasive grinding wheel is high in order to perform high-speed grinding. In order to increase the number of rotations of the truing tool and truing the superabrasive grinding wheel, the truing tool is driven at high speed by an electric motor in a general-purpose grinding machine using a superabrasive grinding wheel. The apparatus is detachably mounted on the work table or headstock during truing.
[0003]
[Problems to be solved by the invention]
In the above conventional truing device, since an electric motor for driving the truing tool at high speed is separately provided, the device itself becomes expensive and large, and it takes a lot of time to attach and detach the work table or headstock for truing. There was a problem of spending labor.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the structural feature of the invention described in claim 1 is that a support shaft is detachably supported by a workpiece support device of a grinding machine, and is supported rotatably on the support shaft. A drive member, a tool support rotatably supported on the support shaft and mounted with a truing tool; and the tool support interposed between the tool support and the drive member to accelerate the rotation of the drive member. A speed increasing mechanism for transmitting to the workpiece, a means for connecting the drive member to the workpiece drive mechanism of the workpiece support device, and a rotation restriction for detachably connecting the support shaft to the workpiece support device by restricting rotation. Means .
[0005]
The structural feature of the invention according to claim 2 is that a support shaft that is detachably supported by a workpiece support device of a grinding machine, a drive member that is rotatably supported by the support shaft, and a rotation that rotates on the support shaft An output member that is supported, a speed increasing mechanism that is interposed between the output member and the drive member, and accelerates the rotation of the drive member and transmits the rotation to the output member. A tool support to which the truing tool is mounted, joint means for transmitting rotation of the output member to the tool support, means for connecting the drive member to a work drive mechanism of the work support device, and the support Rotation regulating means for regulating the rotation of the shaft to the workpiece support device and detachably connecting the shaft .
[0006]
According to a third aspect of the present invention, in the detachable speed-up truing device according to the second aspect, the joint means is provided on the engagement means provided on the output member and the tool support. This is constituted by the engaging means and the abutting means for engaging in the rotational direction.
[0007]
The structural feature of the invention according to claim 4 is that in the detachable speed increasing truing device according to any one of claims 1 to 3, the speed increasing mechanism is constituted by a planetary gear mechanism. .
[0008]
According to a fifth aspect of the present invention, there is provided a grinding machine capable of mounting the detachable speed-up truing device according to any one of the first to fourth aspects, wherein the workpiece support device is provided on the grinding machine. The headstock and the tailstock, the means for supporting the support shaft between the headstock and the tailstock, and connecting the drive member to the workpiece driving mechanism of the workpiece support device are the spindle stock. It is a rotation transmission means which connects the drive member and the rotation member which is supported and supported by rotation to removably.
[0009]
According to a sixth aspect of the present invention, there is provided a grinding machine capable of mounting the detachable speed-up truing device according to any one of the first to fourth aspects, wherein the workpiece support device is provided on the grinding machine. A spindle center and a tailstock provided on a spindle that is supported by the spindle stock and is driven to rotate. The support shaft is supported between the spindle center and the tailstock, and the drive member is supported by the workpiece. The means for connecting to the workpiece drive mechanism of the apparatus is rotation transmission means for detachably connecting the main shaft and the drive member.
[0010]
According to a seventh aspect of the present invention, there is provided a grinding machine capable of mounting the detachable speed-up truing device according to any one of the first to fourth aspects, wherein the workpiece support device is provided on the grinding machine. A chuck and a tailstock mounted on a spindle that is supported by the spindle stock and is rotationally driven. The chuck grips the drive member, supports the rear end of the support shaft by the tailstock, and drives the drive. The means for connecting the member to the workpiece driving mechanism of the workpiece support device is the chuck for detachably holding the driving member.
[0011]
A structural feature of the invention according to claim 8 is that the grinder capable of mounting the detachable speed-up truing device according to any one of claims 5 to 7, wherein the means for restricting the rotation of the support shaft is provided. Rotation restricting means for restricting the rotation of the support shaft to the tailstock and detachably connecting the support shaft.
[0012]
According to a ninth aspect of the present invention, there is provided a grinding machine capable of mounting the detachable speed-up truing device according to the fifth aspect, wherein the means for restricting the rotation of the support shaft includes the support shaft as the main shaft. It is a rotation restricting means for restricting rotation to the base and detachably connecting it.
[0013]
The structural features of the invention according to claim 10 are: an auxiliary support base that is detachably mounted between the main spindle base and the tailstock so as to face the main spindle base, and the main spindle base and the auxiliary support base. A support shaft removably supported between the support shaft, a drive member rotatably supported on the support shaft, a tool support rotatably supported on the support shaft, and a truing tool attached thereto, and the tool support A speed increasing mechanism that is interposed between the driving member and increases the rotation of the driving member and transmits the rotation to the tool support, and means for connecting the driving member to the workpiece driving mechanism of the headstock, Rotation regulation means for regulating the rotation of the support shaft to the auxiliary support base and detachably connecting the support shaft .
[0014]
[Operation and effect of the invention]
In the invention according to claim 1 having the structure described above, rotatably supporting the driving member and the tool support removably supported supported shaft to regulate the workpiece support device twice rotation of the grinding machine Then, the rotation transmitted from the workpiece drive mechanism of the workpiece support device to the drive member is accelerated by the speed increasing mechanism and transmitted to the tool support, and the rotation is superposed by the truing tool attached to the tool support. Since the grinding wheel is truing, the truing tool can be rotated at high speed by the work drive mechanism of the work support device of the grinding machine without providing an electric motor to drive the truing tool. It is extremely easy to attach and detach the truing device to the grinding machine during truing, especially in a general-purpose grinding machine using a superabrasive grinding wheel. It is possible to provide a simple truing device with an inexpensive and compact has been desired Te.
[0015]
In the invention according to Claim 2 as constructed above, removably rotate the drive member and the output member and the tool support supported supported shaft to regulate the workpiece support device twice rotation of the grinding machine The rotation that is freely supported and transmitted from the workpiece drive mechanism of the workpiece support device to the drive member is accelerated by the speed increasing mechanism and transmitted to the output member, and the rotation of the output member is transmitted through the joint means. Since the superabrasive grinding wheel is trued by the truing tool that transmits the tool support and is attached to the tool support, the vibration of the speed increasing mechanism or the like is applied to the tool support in addition to the effect of the invention of claim 1. Transmission can be blocked by the joint means, and truing with extremely high accuracy can be performed.
[0016]
In the invention according to claim 3 configured as described above, the engagement means provided on the output member is engaged with the contact means provided on the tool support to transmit the rotation of the output member to the tool support. As a result, the vibration of the speed increasing mechanism and the like transmitted to the tool support can be effectively blocked with a simple configuration.
[0017]
In the invention according to claim 4 configured as described above, the planetary gear mechanism is a speed increasing mechanism for increasing the speed transmitted from the work drive mechanism of the work support device to the drive member and transmitting it to the truing tool. Since it comprises, in addition to the effect of the invention of Claim 1, a compact truing apparatus can be provided with a simple mechanism.
[0018]
In the invention according to claim 5 configured as described above, the support shaft is supported between the head stock supporting the workpiece and the tailstock while restricting the rotation, and is supported by the head stock and rotated. Since the rotation transmitted from the rotating member to the drive member is accelerated by the speed increasing mechanism and transmitted to the truing tool, the truing device is placed between the headstock and tailstock of the grinding machine only during truing. It can be easily installed and the truing tool can be driven to rotate at high speed.
[0019]
In the invention according to claim 6 configured as described above, the support shaft is supported by restricting the rotation between the spindle center and the tailstock provided on the spindle that is rotatably supported by the spindle base. Since the rotation transmitted from the main shaft to the drive member is accelerated by the speed increasing mechanism and transmitted to the truing tool, the truing device can be attached to and detached from the grinding machine and the truing tool can be driven at high speed.
[0020]
In the invention according to claim 7 configured as described above, the support shaft is supported by the chuck and the tailstock mounted on the main shaft, and the rotation transmitted from the main shaft to the drive member via the chuck is a speed increasing mechanism. Since the speed is increased and transmitted to the truing tool, it is easy to attach and detach the truing device to and from the grinding machine and to transmit the rotation from the main shaft to the driving member, and it becomes extremely easy to drive the truing tool at a high speed.
[0021]
In the invention according to claim 8 configured as described above, since the rotation of the support shaft supported between the headstock and the tailstock is restricted by the connection with the tailstock, the rotation of the support shaft Can be controlled with a simple structure on the tailstock side where a large space can be secured, and the truing tool can be driven to rotate at a high speed by increasing the rotation of the driving member with the speed increasing mechanism.
[0022]
In the invention according to claim 9 configured as described above, since the rotation of the support shaft supported between the headstock and the tailstock is restricted by the connection with the headstock, the rotation of the support shaft is prevented. The truing tool can be driven to rotate at a high speed by regulating with a simple structure and increasing the rotation of the drive member with a speed increasing mechanism.
[0023]
In the present invention according to claim 10 structured as described above, and supported by regulating the rotation of the support shaft in wear detachably mounted auxiliary support base and headstock and between the headstock and tailstock The rotation transmitted from the workpiece drive mechanism of the headstock to the drive member is accelerated by the speed increasing mechanism and transmitted to the tool support, and the superabrasive grinding wheel is trued by the truing tool attached to the tool support. Therefore, it is not necessary to move the tailstock, which has a large influence on the machining accuracy of the workpiece, for each truing, and the setup change for attaching / detaching the truing device is simplified.
[0024]
Embodiment
Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 10 denotes a general general-purpose grinding machine that grinds a workpiece W supported by a workpiece support device 11 with a superabrasive grinding wheel 12. When truing the superabrasive grinding wheel 12, a detachable speed-up truing device 13 according to the present invention shown in FIGS. 2 and 3 is mounted on the workpiece support device 11, and the superabrasive grinding wheel 12 is trued. Reference numeral 14 denotes a bed. A table 15 is slidably mounted on the bed 14 and is moved in the Z-axis direction by a servo motor and a ball screw mechanism (not shown). On the table 15, a headstock 16 and a tailstock 17 as the workpiece support device 11 are fixed so as to face each other, and the workpieces W are received by centers 18 and 19 provided on the spindle stock 16 and the tailstock 17. Both ends are center supported. A face plate 20 is rotatably supported on the head stock 16, and the workpiece W is rotationally driven by the engagement between a scrape 21 attached to the workpiece W and a scraper 22 fixed to the face plate 20. ing. A grindstone table 23 is placed on the bed 14 so as to be slidable in the X-axis direction perpendicular to the sliding direction of the table 15, and is moved forward and backward toward the workpiece W by a servo motor and a ball screw mechanism (not shown). It is like that. A grinding wheel shaft 24 that is rotationally driven by a motor is rotatably supported on the grinding wheel base 23, and the superabrasive grinding wheel 12 is attached to the grinding wheel shaft 24. The superabrasive grinding wheel 12 is formed by bonding abrasive grains of ultrahard material such as cubic boron nitride (CBN) or diamond with vitrified bond, resinoid bond, or metal bond.
[0025]
As shown in FIGS. 1 and 2, a support cylinder 26 is integrally fixed to a headstock body 25 fixed on a table 15, and a face plate 20 as a rotating member can be rotated via a bearing 28 to the support cylinder 26. It is supported by. The face plate 20 is rotated by a motor 29 mounted on the headstock body 25 via a pulley 27 and a belt. A workpiece driving mechanism 30 is configured by the face plate 20, the pulley 27, the motor 29, and the like. The center 18 is fitted to the tip of the support cylinder 26 and protrudes from the face plate 20 toward the tailstock 17. Reference numeral 35 denotes a main body of the tailstock 17 fixed on the table 15. A sleeve 36 urged by a spring toward the headstock 16 is supported by the tailstock body 35 so as to be slidable. The center 19 is fitted to the tip of the sleeve 36.
[0026]
The detachable speed-up truing device 13 according to the present invention has a support shaft 40 supported at both ends between the centers 18 and 19, and an engagement between a thread 42 attached to the drive member 41 and a thread turning 22 fixed to the face plate 20. Accordingly, the drive member 41 is driven to rotate. A means for connecting the drive member 41 to the workpiece drive mechanism 30 of the workpiece support device 11 by means of the knurl 42 and the knurl 22 or the like, that is, the face plate 20 supported by the head stock 16 and the drive member 41 is attached and detached. A rotation transmission means 43 that is freely connected is configured. Both ends of a connecting member 44 that is cylindrical and slit in the longitudinal direction are fitted to the rear end of the support shaft 40 and the center 19 respectively, and the screw 45 is tightened so that the gap between the slits is reduced, thereby connecting the connecting member. The rotation of the support shaft 40 is restricted by fixing 44 to the support shaft 40 and the center 19. A means for restricting the rotation of the support shaft 40 by the center 19, the connecting member 44, the screw 45, etc., that is, a rotation restricting means 46 for restricting the rotation of the support shaft 40 to the tailstock 17 and detachably connecting the support shaft 40 is configured. .
[0027]
As shown in FIG. 3, a cup-shaped drive member 41 is rotatably supported by a bearing 50 on the support shaft 40 of the detachable speed-up truing device 13. The first internal gear 51 is fitted to the step portion of the large-diameter hole 47 of the drive member 41, and the annular member 48 fitted to the large-diameter hole 47 is tightened in the direction of the step portion by the bolt 49 to be first. The internal gear 51 is pressed and fixed to the 47 step portion of the large-diameter hole. The first planetary gear 52 meshes with the first internal gear 51, and a first shaft 54 that projects from the first planetary gear 52 in the axial direction of the support shaft 40 is free from a flange 53 provided on the support shaft 40. It is supported so that it can rotate. 56 is an intermediate member rotatably supported on the support shaft 40 by the bearing 57 on the inner periphery and on the inner peripheral surface of the annular member 48 by the bearing 58 on the outer periphery. The first member is engraved on the small diameter portion of the intermediate member 56. A sun gear 59 meshes with the first planetary gear 52. A second shaft 60 is supported on the intermediate member 56 so as to be freely rotatable in a direction parallel to the axis of the support shaft 40, and a second planetary gear 61 is integrally provided on the second shaft 60. A second internal gear 62 and a lid member 80 are fitted in the opening of the large-diameter hole 47 of the drive member 41 along with the annular member 48, and the lid member 80 is fastened to the annular member 48 by a bolt 81 to form the second inner gear. The toothed gear 62 is fixed to the large diameter hole 47. The second planetary gear 61 is meshed with the second internal gear 62. An output member 63 is rotatably supported on the support shaft 40 by a bearing 64, and a second sun gear 65 fixed to the output member 63 is engaged with the second planetary gear 61.
[0028]
A two-stage planetary gear mechanism 66 composed of first and second internal gears, planetary gears, sun gears 51, 62, 52, 61, 59, 65 and the like is interposed between the output member 63 and the drive member 41. The mounted speed increasing mechanism 67 is configured. For example, when the number of teeth of the internal gears 51 and 62 is 90, the number of teeth of the planetary gears 52 and 61 is 20, and the number of teeth of the sun gears 59 and 65 is 50, the speed increasing mechanism 67 rotates the drive member 41. The speed is increased by 6.84 times and transmitted to the output member 63. The speed increasing mechanism 67 is not limited to the planetary gear mechanism 66, and a known speed increasing mechanism such as a speed increasing gear train may be used.
[0029]
A tool support 85 is rotatably supported on the support shaft 40 by a bearing 86, and the rotation of the output member 63 is transmitted through the joint means 87. As shown in FIG. 4, the transmission means 87 includes a projection 88 as an engagement means protruding from the output member 63 and a recess 89 as a contact means provided on the tool support 85 and into which the protrusion 88 is loosely fitted. The protrusion 88 engages with the side wall of the recess 89 by the rotation of the output member 63 and transmits the rotation of the output member 63 to the tool support 85.
[0030]
A truing tool 90 is attached to the tool support 85 with bolts 91. In the case of truing a grinding wheel of cubic boron nitride (CBN) abrasive grains, a truing tool 90 having an abrasive grain portion 92 in which diamond abrasive grains are bonded by metal bonds is attached to a tool support 85, and the diamond abrasive wheel is polished. When truing, a truing tool 90 made of a GC grindstone in which silicon carbide SiC is bonded by a resinoid bond or a vitrified bond is attached to the tool support 85. As a truing tool for diamond abrasive grains, there are abrasive grains in which diamond grains are arranged in a single row in the width direction of the disk and in a plurality of rows in the radial direction and bonded by metal bonds, and a large number of diamond grains are combined with the width of the disk and Those having an abrasive grain portion distributed in the radial direction and bonded by metal bonds and having R portions formed at both corners in the width direction are used. The truing tool made of a GC grindstone may be a general grindstone whose outer peripheral surface shape is complemented with the outer peripheral shape of a diamond grinding wheel to be trued. Reference numeral 93 is a detection disk attached to the side surface of the truing tool 90, and detects the position of the grinding wheel 12 when the paint applied to the outer periphery is slightly scraped off by the grinding wheel 12.
[0031]
In the embodiment configured as described above, when the workpiece W is ground, the workpiece W is center-supported by the centers 18 and 19 between the headstock 16 and the tailstock 17, The table 15 is moved relative to the X and Z axes, and the workpiece W is ground by the grinding wheel 12. When truing the grinding surface of the grinding wheel 12 in which the superabrasive particles are worn and dropped by grinding, the support shaft 40 of the detachable acceleration truing device 13 is replaced with the spindle stock 16 and the tailstock 17 instead of the workpiece W. It is supported by both centers 18 and 19 between them. The face plate 20 and the drive member 41 are rotationally connected by engaging the knurl 42 fixed to the drive member 41 of the detachable speed-up truing device 13 with the knurl turn 22 protruding from the face plate 20 of the headstock 16. The connecting member 44 is fitted to the rear end of the support shaft 40 and the center 19, the screw 45 is tightened so that the gap between the slits is small, and the support shaft 40 is fixed to the center 19 by the connecting member 44. Regulate rotation. In this state, when the face plate 20 is rotationally driven through the motor 29, the belt, and the pulley 27, for example, at 500 rpm, the drive member 41 is also rotated at the same rotational speed, and the output member 63 is rotated at 6.84 by the planetary gear mechanism 66. The speed is doubled and rotationally driven at 3,420 min ⁻¹ , the projection 88 of the joint means 87 abuts against the side wall of the recess 89, and the tool support 85 is rotationally driven at the same rotational speed as the output member 63. In this state, the grinding wheel base 23 is advanced in the Z-axis direction, the grinding wheel 12 is slightly advanced toward the truing tool 90 by one truing cut amount, and the table 15 is traversed in the Z-axis direction to move the grinding wheel 12. The ground surface is trued with the truing tool 90. In this case, in order to avoid a collision between the grinding wheel 12 and the abrasive grain portion 92 of the truing tool 90, the grinding wheel 12 is advanced in a state where the grinding wheel 12 is opposed to the detection disk 93 and is in contact with the detection disk 93. May be detected when the paint applied to the outer periphery of the detection disk is slightly scraped off. Half of the difference between the outer diameter of the detection disk 93 and the outer diameter of the abrasive grain portion 92 of the truing tool 90 is the amount of cutting of the abrasive grain portion 92 into the grinding wheel 12.
[0032]
In the above embodiment, the rotation of the output member 63 is transmitted to the tool support 85 via the joint means 87. However, the output member 63 and the tool support 85 are integrated, and the output member 63 is connected to the tool support. The truing tool 90 may be attached as follows.
[0033]
In the above embodiment, the rotation of the support shaft 40 is restricted by fixing the connecting member 44 to the support shaft 40 and the center 19, but as shown in FIGS. A chamfer 95 is provided, and a shaft end hole 96 that fits into the chamfer 95 with a slight gap is provided on the end surface of the support shaft 40 on the headstock 16 side, and a center hole 97 formed in the bottom surface of the shaft end hole 96 and a support The support shaft 40 is supported by fitting the centers 18 and 19 into the center hole at the rear end of the shaft, and the support shaft 40 is detachably connected to the headstock 16 by the engagement between the two chamfers 95 and the shaft end hole 96. Thus, the rotation may be restricted.
[0034]
In the above-described embodiment, the headstock 16 has a support cylinder 26 with a center 18 fitted at the tip thereof fixed integrally to the main spindle body 25, and the face plate 20 is rotatably supported by the support cylinder 26. However, as shown in FIG. 7, the headstock 70 may be one in which a main shaft 72 having a main shaft center 71 fitted at the tip thereof is rotatably supported by the main body 73. In this case, the support shaft 40 of the detachable speed-up truing device 13 is center-supported between the spindle center 71 and the center 19 of the tailstock 17 and the drive member 41 is protruded from the end face of the spindle 42 and the spindle 72 attached thereto. It is rotationally driven by engagement with the provided turning mechanism 74. Since the support shaft 40 is connected to the center 19 by the connecting member 41 and is restricted from rotating, relative rotation occurs between the center hole of the support shaft 40 and the spindle center 71, but only during truing. If lubricated with grease, etc., there is no problem. The spindle center 71 may be a rib center whose tip portion can freely rotate.
[0035]
As shown in FIG. 8, a three-claw chuck 98 is attached to the end surface of the main shaft 72 in place of the turning tool 74, the drive member 41 is gripped by the chuck 98 and rotated, and the support shaft is supported by the center 19 of the tailstock 17 The rear end of 40 may be center-supported, and the support shaft 40 may be connected to the center 19 by a connecting member 41 to restrict rotation.
[0036]
In the above embodiment, since the rear end of the support shaft 40 is supported by the tailstock 17, when a plurality of workpieces W of the same type are continuously ground, each truing is performed. The position of the tailstock 17 needs to be adjusted in accordance with the difference in length between the workpiece W and the support shaft 40. In order to ease the position adjustment work of the tailstock 17, as shown in FIG. 9, a lightweight auxiliary support base 76 having a center 75 is detachably mounted on the table 15 so as to face the headstock 16. The support shaft 40 of the detachable speed-up truing device 13 may be supported by the centers 18 and 75 between the head stock 16 and the auxiliary support base 76.
[Brief description of the drawings]
FIG. 1 is a front view of a general-purpose grinding machine using a detachable speed-up truing device according to the present invention.
FIG. 2 is a view showing a state in which the detachable speed-up truing device according to the present invention is supported at both ends between a headstock and a tailstock of a general-purpose grinding machine.
FIG. 3 is a longitudinal sectional view of a detachable speed-up truing device according to the present invention.
FIG. 4 is an enlarged sectional view showing joint means.
FIG. 5 is a view showing an embodiment in which a support shaft is connected to a center of a headstock while restricting rotation.
6 is a cross-sectional view taken along line 6-6 in FIG.
FIG. 7 is a view showing another embodiment of the head stock.
FIG. 8 is a diagram showing an embodiment in which a driving member is gripped by a chuck.
FIG. 9 is a view showing an embodiment for supporting an auxiliary support base support shaft.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Grinding machine, 11 ... Workpiece support device, 12 ... Super-abrasive grinding wheel, 13 ... Detachable speed-up truing device, 14 ... Bed, 15 ... Table, 16, 70 ... Spindle head, 17 ... Tailstock, 17, 19, 75 ... center, 20 ... face plate (rotating member), 22, 74 ... turning, 23 ... grinding wheel base, 30 ... work drive mechanism, 40 ... support shaft, 41 ... driving member, 42 ... knitting, 43 Rotation transmitting means 46 Rotation restricting means 63 Output member 66 Planetary gear mechanism 67 Speed increasing mechanism 71 Spindle center 72 Spindle 76 Auxiliary support base 85 Tool support 87 DESCRIPTION OF SYMBOLS ... Joint means 88 ... Engagement means 89 ... Contact means 90 ... Truing tool, 95 ... Two chamfering, 96 ... Shaft end hole, 98 ... Chuck, W ... Workpiece.

Claims

A support shaft detachably supported by a workpiece support device of a grinding machine, a drive member rotatably supported by the support shaft, and a tool support rotatably supported by the support shaft and attached with a truing tool; A speed increasing mechanism interposed between the tool support and the drive member for increasing the rotation of the drive member and transmitting it to the tool support; and the work drive mechanism of the work support device for the drive member. A detachable speed-up truing device comprising: means for connecting the support shaft to the workpiece support device; and rotation regulating means for detachably connecting the support shaft to the workpiece support device.

A support shaft detachably supported by a workpiece support device of a grinding machine, a drive member rotatably supported on the support shaft, an output member rotatably supported on the support shaft, and the output member A speed increasing mechanism interposed between the drive members for increasing the rotation of the drive member and transmitting it to the output member; a tool support rotatably supported on the support shaft; and a tool support on which a truing tool is attached; Joint means for transmitting the rotation of the member to the tool support, means for connecting the drive member to the workpiece drive mechanism of the workpiece support device, and controlling the rotation of the support shaft to the workpiece support device. A detachable speed-up truing device comprising a rotation restricting means that is detachably connected .

3. The detachable speed-up truing device according to claim 2, wherein the joint mechanism includes an engaging means provided on the output member and an abutment provided on the tool support and engaged with the engaging means in the rotational direction. And a detachable speed-up truing device.

4. The removable speed-up truing device according to claim 1, wherein the speed-up mechanism is a planetary gear mechanism.

5. A grinder capable of detaching the detachable speed-up truing device according to claim 1, wherein the workpiece support device is a headstock and a tailstock of the grinder, Means for supporting the support shaft between the tailstock and connecting the drive member to the workpiece drive mechanism of the workpiece support device are supported by the spindle stock and rotated and driven. A grinder capable of mounting a detachable speed-up truing device , wherein the grinder is a rotation transmitting means for detachably connecting a member.

The grinder capable of mounting the detachable speed-up truing device according to any one of claims 1 to 4, wherein the workpiece support device is provided on a spindle that is rotatably supported by a spindle base of the grinding machine. The spindle center and the tailstock, and the means for supporting the support shaft between the spindle center and the tailstock and connecting the drive member to the workpiece drive mechanism of the workpiece support device includes: A grinder capable of mounting a detachable speed-up truing device , wherein the grinder is a rotation transmitting means for detachably connecting a main shaft and the drive member.

The grinder capable of mounting the detachable speed-up truing device according to any one of claims 1 to 4, wherein the workpiece support device is mounted on a spindle that is rotatably supported by a spindle base of the grinding machine. A chuck and a tailstock, which grips the driving member, supports the rear end of the support shaft by the tailstock, and uses the driving member as a workpiece driving mechanism of the workpiece support device. A grinder capable of mounting a detachable speed-up truing device, wherein the connecting means is the chuck for detachably holding the driving member.

The grinder capable of mounting the detachable acceleration truing device according to any one of claims 5 to 7, wherein the means for restricting rotation of the support shaft restricts rotation of the support shaft to the tailstock. A grinder capable of mounting a detachable speed-up truing device characterized in that it is a rotation restricting means that is detachably connected.

6. A grinder capable of mounting the detachable speed-up truing device according to claim 5 , wherein the means for restricting the rotation of the support shaft is a rotation for detachably connecting the support shaft to the headstock while restricting the rotation of the support shaft. A grinder capable of mounting a detachable speed-up truing device , which is a regulating means.

An auxiliary support base that is detachably mounted between the headstock and the tailstock so as to face the spindle base, and a support shaft that is detachably supported between the spindle base and the auxiliary support base, A drive member rotatably supported on the support shaft, a tool support rotatably supported on the support shaft, and a truing tool attached thereto, and interposed between the tool support and the drive member, A speed increasing mechanism for speeding up rotation and transmitting it to the tool support; means for connecting the drive member to the work piece drive mechanism of the headstock; and controlling the rotation of the support shaft to the auxiliary support base. A grinder capable of mounting a detachable speed-up truing device , characterized in that it comprises a rotation restricting means that is detachably connected .