JP6667258B2 - Polishing device, pressing unit, and polishing method - Google Patents

Polishing device, pressing unit, and polishing method Download PDF

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JP6667258B2
JP6667258B2 JP2015212816A JP2015212816A JP6667258B2 JP 6667258 B2 JP6667258 B2 JP 6667258B2 JP 2015212816 A JP2015212816 A JP 2015212816A JP 2015212816 A JP2015212816 A JP 2015212816A JP 6667258 B2 JP6667258 B2 JP 6667258B2
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polishing
polishing member
cylindrical hole
main body
pressing unit
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JP2017080851A (en
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博芳 中谷
博芳 中谷
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Kawasaki Motors Ltd
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Kawasaki Jukogyo KK
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Description

本発明は、研磨装置、押圧ユニット、及び研磨方法に関する。   The present invention relates to a polishing apparatus, a pressing unit, and a polishing method.

従来の研磨装置では、砥粒を敷いた定盤に被研磨面（加工面）を押し当てながら当該被研磨面をスライドさせることで研磨を行っていた（特許文献１、２参照）。   In a conventional polishing apparatus, polishing is performed by sliding the surface to be polished while pressing the surface to be polished (processed surface) against a surface plate on which abrasive grains are spread (see Patent Documents 1 and 2).

特開２００８−２３８２８４号公報JP 2008-238284 A 特開２０１４−２０５２２４号公報JP 2014-205224A

ところが、内径が段階的に小さくなるように形成された筒状孔において、内径が切り替わる部分の面、つまり筒状孔の中心軸に対して垂直な環状面又は筒状孔と同心の円錐面（以下、「ショルダ面」と称する）を磨面する場合、被研磨面であるショルダ面に定盤を押し当てることはできないため、従来の研磨装置では研磨を行うことができなかった。   However, in the cylindrical hole formed such that the inner diameter gradually decreases, the surface of the portion where the inner diameter switches, that is, an annular surface perpendicular to the center axis of the cylindrical hole or a conical surface concentric with the cylindrical hole ( When the surface is polished (hereinafter referred to as a "shoulder surface"), it is impossible to press the platen against the shoulder surface, which is the surface to be polished, so that the conventional polishing apparatus cannot perform polishing.

本発明は、以上のような事情に鑑み、筒状孔のショルダ面を研磨することができる研磨装置を提供することを目的としている。   The present invention has been made in view of the above circumstances, and has as its object to provide a polishing apparatus that can polish a shoulder surface of a cylindrical hole.

本発明の一態様に係る研磨装置は、加工対象に形成された筒状孔の内周面にガイドされながら回転し、前記筒状孔の中心軸に対して垂直な環状面又は前記筒状孔と同心の円錐面であるショルダ面を研磨する研磨部材と、前記研磨部材を軸方向に移動可能に保持して前記研磨部材を回転させる駆動モータと、前記研磨部材と前記駆動モータとの間に位置する押圧ユニットと、を備え、前記押圧ユニットは、前記加工対象における前記筒状孔の開口部分に取り付けられ、前記駆動モータが固定される筒状の本体部材と、前記本体部材の内部に位置し、前記研磨部材を前記ショルダ面に向かって押圧するコイルばねと、前記本体部材に対して回転可能となるように前記コイルばねを受ける環状の軸受と、を有する。   The polishing apparatus according to one aspect of the present invention is configured such that the polishing apparatus rotates while being guided by the inner peripheral surface of a cylindrical hole formed in a processing target, and has an annular surface perpendicular to a central axis of the cylindrical hole or the cylindrical hole. A polishing member for polishing a shoulder surface which is a concentric conical surface, a driving motor for rotating the polishing member while holding the polishing member movably in the axial direction, and a driving motor for rotating the polishing member between the polishing member and the driving motor. A pressing unit, wherein the pressing unit is attached to an opening portion of the cylindrical hole in the object to be processed, and a cylindrical main body member to which the drive motor is fixed, and is located inside the main body member. A coil spring that presses the polishing member toward the shoulder surface; and an annular bearing that receives the coil spring so as to be rotatable with respect to the main body member.

この研磨装置によれば、コイルばねが回転しながら研磨部材をショルダ面に向かって押圧するため、ショルダ面は研磨部材から一定の圧力を受けながら研磨される。しかも、研磨部材は、筒状孔の内周面にガイドされながら回転するため、筒状孔の軸方向に沿って移動することができる。つまり、ショルダ面は、研磨部材から常に一定方向の力を受けながら研磨されることになる。よって、上記構成によれば、筒状孔のショルダ面を精度よく研磨することができる。   According to this polishing apparatus, since the coil spring presses the polishing member toward the shoulder surface while rotating, the shoulder surface is polished while receiving a constant pressure from the polishing member. Moreover, since the polishing member rotates while being guided by the inner peripheral surface of the cylindrical hole, it can move along the axial direction of the cylindrical hole. That is, the shoulder surface is polished while constantly receiving a force in a certain direction from the polishing member. Therefore, according to the above configuration, the shoulder surface of the cylindrical hole can be accurately polished.

上記の研磨装置において、前記押圧ユニットは、前記コイルばねと前記研磨部材との間に介在し、前記本体部材の内部に挿入されて軸方向に移動可能な環状の接触部材を有し、前記本体部材は、前記研磨部材側の開口部分に環状の係止部を有し、前記接触部材の外径は前記係止部の内径よりも大きくてもよい。   In the above polishing apparatus, the pressing unit has an annular contact member that is interposed between the coil spring and the polishing member, is inserted inside the main body member, and is movable in the axial direction, The member may have an annular locking portion at an opening on the polishing member side, and an outer diameter of the contact member may be larger than an inner diameter of the locking portion.

この構成によれば、接触部材の外径は係止部の内径よりも大きいことから、接触部材は係止部に係止されることで本体部材から抜け落ちることはない。また、接触部材を介して研磨部材を押圧するコイルばねも本体部材から抜け落ちることはない。そのため、研磨装置から研磨部材を取り外したとしても、押圧ユニットの各構成部材が互いに分離することはない。よって、上記の構成によれば、研磨部材の取付、取外し、及び交換を容易に行うことができる。   According to this configuration, since the outer diameter of the contact member is larger than the inner diameter of the locking portion, the contact member does not fall out of the main body member by being locked by the locking portion. In addition, the coil spring that presses the polishing member via the contact member does not fall off the main body member. Therefore, even if the polishing member is removed from the polishing apparatus, the constituent members of the pressing unit do not separate from each other. Therefore, according to the above configuration, attachment, removal, and replacement of the polishing member can be easily performed.

上記の研磨装置において、前記押圧ユニットは、前記コイルばねの前記本体部材に対する軸方向位置を変化させることにより、前記コイルばねが前記研磨部材を前記ショルダ面に向かって押圧する圧力を調整することができる圧力調整部材を有していてもよい。   In the above polishing apparatus, the pressing unit may adjust a pressure at which the coil spring presses the polishing member toward the shoulder surface by changing an axial position of the coil spring with respect to the main body member. It may have a pressure adjusting member that can.

この構成によれば、被研磨面の加工状況に応じて研磨部材をショルダ面に押圧する圧力を調整することができるため、精度の高い研磨が可能となる。   According to this configuration, the pressure for pressing the polishing member against the shoulder surface can be adjusted in accordance with the processing condition of the surface to be polished, so that highly accurate polishing can be performed.

また、本発明の一態様に係る押圧ユニットは、加工対象に形成された筒状孔の内周面にガイドされながら回転し、前記筒状孔の中心軸に対して垂直な環状面又は前記筒状孔と同心の円錐面であるショルダ面を研磨する研磨部材と、前記研磨部材を軸方向に移動可能に保持して前記研磨部材を回転させる駆動モータと、の間に配置され、前記研磨部材を前記ショルダ面に押圧するための押圧ユニットであって、前記加工対象における前記筒状孔の開口部分に取り付けられ、前記駆動モータが固定される筒状の本体部材と、前記本体部材の内部に位置し、前記研磨部材を前記ショルダ面に向かって押圧するコイルばねと、前記本体部材に対して回転可能に前記コイルばねを受ける環状の軸受と、を有する。   The pressing unit according to one aspect of the present invention rotates while being guided by the inner peripheral surface of a cylindrical hole formed in a processing target, and has an annular surface perpendicular to a central axis of the cylindrical hole or the cylindrical surface. A polishing member for polishing a shoulder surface, which is a conical surface concentric with the hole, and a drive motor for rotating the polishing member while holding the polishing member movably in an axial direction, wherein the polishing member A pressing unit for pressing the shoulder surface, the cylindrical body member attached to the opening of the cylindrical hole in the object to be processed, the drive motor is fixed, and the inside of the body member A coil spring positioned to press the polishing member toward the shoulder surface; and an annular bearing rotatably receiving the coil spring with respect to the main body member.

この押圧ユニットによれば、研磨装置で説明した理由と同じ理由により、筒状孔のショルダ面を精度よく研磨することができる。   According to this pressing unit, the shoulder surface of the cylindrical hole can be accurately polished for the same reason as described for the polishing apparatus.

また、本発明の一態様に係る研磨方法は、研磨部材を軸方向に移動可能に保持し、当該研磨部材を加工対象に形成された筒状孔の内周面でガイドしながら回転させ、前記研磨部材とともに回転するコイルばねによって前記筒状孔の中心軸に対して垂直な環状面又は前記筒状孔と同心の円錐面であるショルダ面に向かって前記研磨部材を押圧することで、前記ショルダ面を研磨する。   Further, the polishing method according to one aspect of the present invention holds the polishing member so as to be movable in the axial direction, rotates the polishing member while guiding the polishing member on the inner peripheral surface of a cylindrical hole formed in the processing object, By pressing the polishing member toward an annular surface perpendicular to the central axis of the cylindrical hole or a shoulder surface that is a conical surface concentric with the cylindrical hole by a coil spring rotating with the polishing member, Polish the surface.

この研磨方法によれば、研磨装置で説明した理由と同じ理由により、筒状孔のショルダ面を精度よく研磨することができる。   According to this polishing method, the shoulder surface of the cylindrical hole can be accurately polished for the same reason as described for the polishing apparatus.

上記の研磨装置によれば、筒状孔のショルダ面を研磨することができる。   According to the above polishing apparatus, the shoulder surface of the cylindrical hole can be polished.

図１は、第１実施形態に係る研磨装置の分解一部断面図である。FIG. 1 is an exploded partial cross-sectional view of the polishing apparatus according to the first embodiment. 図２は、第１実施形態に係る研磨装置の組立一部断面図である。FIG. 2 is an assembly partial cross-sectional view of the polishing apparatus according to the first embodiment. 図３は、別の研磨部材を組み込んだ研磨装置の組立一部断面図である。FIG. 3 is an assembly partial cross-sectional view of a polishing apparatus incorporating another polishing member. 図４は、さらに別の研磨部材を組み込んだ研磨装置の組立一部断面図である。FIG. 4 is an assembled partial cross-sectional view of a polishing apparatus incorporating another polishing member. 図５は、第２実施形態に係る研磨装置の組立一部断面図である。FIG. 5 is an assembly partial cross-sectional view of the polishing apparatus according to the second embodiment.

（第１実施形態）
まず、第１実施形態に係る研磨装置１００について説明する。図１は、研磨装置１００の分解一部断面図である。図２は、研磨装置１００の組立一部断面図である。また、図３及び図４は、図２の研磨部材１０Ａと異なる研磨部材１０Ｂ、１０Ｃを組み付けた研磨装置１００の組立一部断面図である。 (1st Embodiment)
First, the polishing apparatus 100 according to the first embodiment will be described. FIG. 1 is an exploded partial cross-sectional view of the polishing apparatus 100. FIG. 2 is a partially sectional view of the assembly of the polishing apparatus 100. FIGS. 3 and 4 are partial cross-sectional views of the polishing apparatus 100 in which polishing members 10B and 10C different from the polishing member 10A of FIG. 2 are assembled.

図１に示すように、研磨装置１００は、研磨部材１０と、駆動モータ４０と、押圧ユニット５０と、を備えている。以下では、はじめに加工対象１０１について説明し、続いて研磨装置１００の各構成要素及び使用方法について順に説明する。   As shown in FIG. 1, the polishing apparatus 100 includes a polishing member 10, a drive motor 40, and a pressing unit 50. Hereinafter, the processing target 101 will be described first, and then the respective components and the method of use of the polishing apparatus 100 will be described in order.

＜加工対象＞
本実施形態の加工対象１０１は、エンジンのシリンダヘッドである。なお、エンジンのシリンダヘッドは一例であり、加工対象はこれに限られない。本実施形態の加工対象１０１には、燃料噴射弁を挿入するための筒状孔１０２が形成されている。図１に示すように、筒状孔１０２は、内径が段階的に小さくなるように形成されている。 <Processing target>
The processing target 101 of the present embodiment is a cylinder head of an engine. The cylinder head of the engine is an example, and the object to be processed is not limited to this. In the processing object 101 of the present embodiment, a cylindrical hole 102 for inserting a fuel injection valve is formed. As shown in FIG. 1, the cylindrical hole 102 is formed such that the inner diameter decreases gradually.

筒状孔１０２は、内径が大きい側（図１の紙面上方側）から順に、第１内周面１０３、第１研磨ショルダ面１０４、第２内周面１０５、第２研磨ショルダ面１０６、第３内周面１０７、非研磨ショルダ面１０８、第３研磨ショルダ面１０９、及び第４内周面１１０の各面を有している。第１内周面１０３、第２内周面１０５、第３内周面１０７、及び第４内周面１１０は、筒状孔１０２の中心軸１１１を囲むようにして円筒状に形成され、中心軸１１１に対して平行に延びている。また、第１内周面１０３の開口部付近には、雌ねじ１１２が形成されている。   The cylindrical hole 102 has a first inner peripheral surface 103, a first polishing shoulder surface 104, a second inner peripheral surface 105, a second polishing shoulder surface 106, and a It has a third inner peripheral surface 107, a non-polished shoulder surface 108, a third polished shoulder surface 109, and a fourth inner peripheral surface 110. The first inner peripheral surface 103, the second inner peripheral surface 105, the third inner peripheral surface 107, and the fourth inner peripheral surface 110 are formed in a cylindrical shape so as to surround the central axis 111 of the cylindrical hole 102. Extend in parallel to A female screw 112 is formed near the opening of the first inner peripheral surface 103.

一方、第１研磨ショルダ面１０４、第２研磨ショルダ面１０６、及び非研磨ショルダ面１０８は、筒状孔１０２の中心軸１１１に対して垂直な環状面である。また、第３研磨ショルダ面１０９は、筒状孔１０２と同心の円錐面である。本実施形態において、第１研磨ショルダ面１０４、第２研磨ショルダ面１０６、及び第３研磨ショルダ面１０９は、燃料噴射弁又はＯリングと接触するシート面である。そのため、本実施形態では、これらの面について研磨（ラッピング）を行って表面を滑らかに仕上げる。   On the other hand, the first polishing shoulder surface 104, the second polishing shoulder surface 106, and the non-polishing shoulder surface 108 are annular surfaces perpendicular to the central axis 111 of the cylindrical hole 102. The third polishing shoulder surface 109 is a conical surface concentric with the cylindrical hole 102. In the present embodiment, the first polishing shoulder surface 104, the second polishing shoulder surface 106, and the third polishing shoulder surface 109 are sheet surfaces that come into contact with the fuel injection valve or the O-ring. Therefore, in this embodiment, these surfaces are polished (wrapped) to finish the surfaces smoothly.

＜研磨部材＞
研磨部材１０は、ショルダ面１０４、１０６、１０９を研磨するための部材であって、回転軸が筒状孔１０２の中心軸１１１と一致するようにして回転する。本実施形態の研磨部材１０には、第１研磨部材１０Ａ（図１及び図２参照）、第２研磨部材１０Ｂ（図３参照）、及び第３研磨部材１０Ｃ（図４参照）が含まれる。 <Polishing member>
The polishing member 10 is a member for polishing the shoulder surfaces 104, 106, and 109, and rotates so that the rotation axis coincides with the central axis 111 of the cylindrical hole 102. The polishing member 10 of the present embodiment includes a first polishing member 10A (see FIGS. 1 and 2), a second polishing member 10B (see FIG. 3), and a third polishing member 10C (see FIG. 4).

第１研磨部材１０Ａは、第１研磨ショルダ面１０４を研磨するための研磨部材である。図１及び図２に示すように、第１研磨部材１０Ａは、第１研磨部１１と、第１支持部１２とを有している。   The first polishing member 10A is a polishing member for polishing the first polishing shoulder surface 104. As shown in FIGS. 1 and 2, the first polishing member 10 </ b> A has a first polishing section 11 and a first support section 12.

第１研磨部１１は、第１研磨ショルダ面１０４に対向する環状の第１研磨面１３が下面に形成された第１研磨円盤部１４と、第１研磨円盤部１４に対して軸方向に離間する第１ガイド円盤部１５と、第１研磨円盤部１４と第１ガイド円盤部１５の間に位置する第１中間部１６とを有している。第１研磨円盤部１４及び第１ガイド円盤部１５は、外周面が筒状孔１０２の第１内周面１０３に接するように形成されている。そのため、第１研磨部材１０Ａは第１内周面１０３にガイドされながら回転する。これにより、第１研磨部材１０Ａの回転軸が筒状孔１０２の中心軸１１１に対して傾斜するのを抑えることができ、第１研磨面１３と第１研磨ショルダ面１０４の平行状態を維持することができる。   The first polishing portion 11 is provided with a first polishing disk portion 14 having an annular first polishing surface 13 formed on the lower surface facing the first polishing shoulder surface 104, and is axially separated from the first polishing disk portion 14. And a first intermediate portion 16 located between the first polishing disk portion 14 and the first guide disk portion 15. The first polishing disk portion 14 and the first guide disk portion 15 are formed such that the outer peripheral surface is in contact with the first inner peripheral surface 103 of the cylindrical hole 102. Therefore, the first polishing member 10A rotates while being guided by the first inner peripheral surface 103. Thereby, the rotation axis of the first polishing member 10A can be prevented from being inclined with respect to the central axis 111 of the cylindrical hole 102, and the first polishing surface 13 and the first polishing shoulder surface 104 are maintained in a parallel state. be able to.

第１支持部１２は、第１研磨部１１を支持する部分である。第１支持部１２は、第１研磨部１１から駆動モータ４０に向かって延びており、先端部分に駆動モータ４０と連結する連結軸１７を有している。連結軸１７の外周面には、軸方向に延びるキー部１８が形成されている。また、第１支持部１２は、連結軸１７よりも第１研磨部１１側に位置する環状の被押圧部１９を有している。被押圧部１９の外径は、後述する押圧ユニット５０の係止部５９の内径よりも小さく、接触部材５２の内径よりも大きい。   The first support part 12 is a part that supports the first polishing part 11. The first support portion 12 extends from the first polishing portion 11 toward the drive motor 40, and has a connection shaft 17 connected to the drive motor 40 at a distal end portion. A key portion 18 extending in the axial direction is formed on the outer peripheral surface of the connecting shaft 17. The first support portion 12 has an annular pressed portion 19 located closer to the first polishing portion 11 than the connecting shaft 17. The outer diameter of the pressed portion 19 is smaller than the inner diameter of the locking portion 59 of the pressing unit 50 described later, and is larger than the inner diameter of the contact member 52.

なお、第１支持部１２は第１研磨部１１と一体に形成してもよいが、第１支持部１２から第１研磨部１１を着脱できるように構成するのが望ましい。このように構成すれば、汎用性が高くなるとともに、第１研磨面１３が摩耗した場合には第１研磨部１１のみを交換すればよいためランニングコストを低減することができる。   Although the first support portion 12 may be formed integrally with the first polishing portion 11, it is preferable that the first support portion 12 be configured so that the first polishing portion 11 can be attached to and detached from the first support portion 12. With this configuration, the versatility is improved, and when the first polishing surface 13 is worn, only the first polishing unit 11 needs to be replaced, so that the running cost can be reduced.

第２研磨部材１０Ｂは、第２研磨ショルダ面１０６を研磨するための研磨部材である。図３に示すように、第２研磨部材１０Ｂは、第２研磨部２１と、第２支持部２２とを有している。   The second polishing member 10B is a polishing member for polishing the second polishing shoulder surface 106. As shown in FIG. 3, the second polishing member 10B has a second polishing section 21 and a second support section 22.

第２研磨部２１は、第２研磨ショルダ面１０６に対向する環状の第２研磨面２３が下面に形成された第２研磨円盤部２４と、第２研磨円盤部２４に対して軸方向に離間する第２ガイド円盤部２５と、第２研磨円盤部２４と第２ガイド円盤部２５の間に位置する第２中間部２６とを有している。第２研磨円盤部２４及び第２ガイド円盤部２５は、外周面が筒状孔１０２の第２内周面１０５に接するように形成されている。そのため、第２研磨部材１０Ｂは第２内周面１０５にガイドされながら回転する。これにより、第２研磨部材１０Ｂの回転軸が筒状孔１０２の中心軸１１１に対して傾斜するのを抑えることができ、第２研磨面２３と第２研磨ショルダ面１０６の平行状態を維持することができる。   The second polishing section 21 is provided with a second polishing disk portion 24 having an annular second polishing surface 23 formed on the lower surface facing the second polishing shoulder surface 106, and is axially separated from the second polishing disk portion 24. And a second intermediate portion 26 located between the second polishing disk portion 24 and the second guide disk portion 25. The second polishing disk portion 24 and the second guide disk portion 25 are formed such that the outer peripheral surface is in contact with the second inner peripheral surface 105 of the cylindrical hole 102. Therefore, the second polishing member 10B rotates while being guided by the second inner peripheral surface 105. Accordingly, the rotation axis of the second polishing member 10B can be suppressed from being inclined with respect to the central axis 111 of the cylindrical hole 102, and the second polishing surface 23 and the second polishing shoulder surface 106 are maintained in a parallel state. be able to.

第２支持部２２は、第２研磨部２１を支持する部分である。第２支持部２２は、第１研磨部材１０Ａの第１支持部１２よりも軸方向寸法が大きい点を除けば、第１支持部１２と基本的に同じ構成を有している。   The second support part 22 is a part that supports the second polishing part 21. The second support portion 22 has basically the same configuration as the first support portion 12 except that the second support portion 22 has a larger axial dimension than the first support portion 12 of the first polishing member 10A.

第３研磨部材１０Ｃは、第３研磨ショルダ面１０９を研磨するための研磨部材である。図４に示すように、第３研磨部材１０Ｃは、第３研磨部３１と、第３支持部３２とを有している。   The third polishing member 10C is a polishing member for polishing the third polishing shoulder surface 109. As shown in FIG. 4, the third polishing member 10C has a third polishing unit 31 and a third support unit 32.

第３研磨部３１は、第３支持部３２に接続される円柱状の芯部３３と、芯部３３に設けられて外周面が筒状孔１０２の第２内周面１０５に接する第３ガイド円盤部３４と、芯部３３の先端側に隣接し第３研磨ショルダ面１０９に対向する第３研磨面３５が形成された研磨円錐部３６と、研磨円錐部３６の先端側に隣接し筒状孔１０２の第４内周面１１０に接する円柱状のガイド円柱部３７とを有している。   The third polishing unit 31 includes a cylindrical core 33 connected to the third support 32, and a third guide provided on the core 33 and having an outer peripheral surface in contact with a second inner peripheral surface 105 of the cylindrical hole 102. A disk portion 34, a polishing conical portion 36 having a third polishing surface 35 adjacent to the distal end side of the core portion 33 and facing the third polishing shoulder surface 109, and a cylindrical portion adjacent to the distal end side of the polishing conical portion 36. And a cylindrical guide column 37 in contact with the fourth inner peripheral surface 110 of the hole 102.

上記のとおり、第３ガイド円盤部３４及びガイド円柱部３７はそれぞれ筒状孔１０２の第２内周面１０５及び第４内周面１１０に接するため、第３研磨部材１０Ｃは、第２内周面１０５及び第４内周面１１０にガイドされながら回転する。これにより、第３研磨部材１０Ｃの回転軸が筒状孔１０２の中心軸１１１に対して傾斜するのを抑えることができ、第３研磨面３５と第３研磨ショルダ面１０９の平行状態を維持することができる。   As described above, since the third guide disk portion 34 and the guide column portion 37 are in contact with the second inner peripheral surface 105 and the fourth inner peripheral surface 110 of the cylindrical hole 102, respectively, the third polishing member 10C is moved to the second inner peripheral surface. It rotates while being guided by the surface 105 and the fourth inner peripheral surface 110. Thereby, it is possible to suppress the rotation axis of the third polishing member 10C from being inclined with respect to the center axis 111 of the cylindrical hole 102, and to maintain the parallel state of the third polishing surface 35 and the third polishing shoulder surface 109. be able to.

第３支持部３２は、第３研磨部３１を支持する部分である。第３支持部３２は、第１研磨部材１０Ａの第１支持部１２よりも軸方向寸法が大きい点を除けば、第１支持部１２と基本的に同じ構成を有している。   The third support part 32 is a part that supports the third polishing part 31. The third support portion 32 has basically the same configuration as the first support portion 12 except that the third support portion 32 has a larger axial dimension than the first support portion 12 of the first polishing member 10A.

＜駆動モータ＞
駆動モータ４０は、研磨部材１０を回転させる装置である。駆動モータ４０は、モータ本体４１と、フランジ部４２と、連結部４３と、を有している。 <Drive motor>
The drive motor 40 is a device that rotates the polishing member 10. The drive motor 40 has a motor main body 41, a flange portion 42, and a connecting portion 43.

モータ本体４１は、モータとしては比較的遅い１００〜２００ｒｐｍで回転する。これは、本実施形態では研磨部材１０を１００〜２００ｒｐｍで回転させるところ、これと同じ回転数でモータ本体４１を回転させれば、変速機は不要となって研磨装置１００の構造を簡略化することができるからである。本実施形態ではモータ本体４１として、エアモータを用いるが、電動モータ等他のモータを用いてもよい。   The motor main body 41 rotates at a relatively low speed of 100 to 200 rpm as a motor. This is because, in the present embodiment, the polishing member 10 is rotated at 100 to 200 rpm. If the motor main body 41 is rotated at the same rotation speed, a transmission is not required and the structure of the polishing apparatus 100 is simplified. Because you can do it. In this embodiment, an air motor is used as the motor main body 41, but another motor such as an electric motor may be used.

フランジ部４２は、モータ本体４１に固定されており、固定ボルト４４が貫通する貫通孔４５が形成されている。後述するように、押圧ユニット５０の本体部材５１には、固定ボルト４４に対応するねじ穴６０が形成されている。固定ボルト４４をフランジ部４２の貫通孔４５を貫通して、押圧ユニット５０のねじ穴６０に組み合わせて締め付けることにより、駆動モータ４０を押圧ユニット５０に固定することができる。   The flange portion 42 is fixed to the motor main body 41 and has a through hole 45 through which a fixing bolt 44 penetrates. As will be described later, a screw hole 60 corresponding to the fixing bolt 44 is formed in the main body member 51 of the pressing unit 50. The drive motor 40 can be fixed to the pressing unit 50 by passing the fixing bolt 44 through the through hole 45 of the flange portion 42 and tightening it in combination with the screw hole 60 of the pressing unit 50.

連結部４３は、モータ本体４１の出力軸４６に取り付けられている。図１に示すように、連結部４３の内部には研磨部材１０の連結軸１７を収容する収容穴４７が形成されており、さらに収容穴４７には研磨部材１０のキー部１８に対応するキー溝４８が軸方向に延びるようにして形成されている。連結部４３のキー溝４８に研磨部材１０のキー部１８を挿入することで、連結部４３は研磨部材１０を軸方向に移動可能に保持しつつ、研磨部材１０を回転させることができる。   The connecting portion 43 is attached to an output shaft 46 of the motor main body 41. As shown in FIG. 1, a receiving hole 47 for receiving the connecting shaft 17 of the polishing member 10 is formed inside the connecting portion 43, and a key corresponding to the key portion 18 of the polishing member 10 is formed in the receiving hole 47. The groove 48 is formed so as to extend in the axial direction. By inserting the key portion 18 of the polishing member 10 into the key groove 48 of the connecting portion 43, the connecting portion 43 can rotate the polishing member 10 while holding the polishing member 10 movably in the axial direction.

なお、研磨部材１０の１つのキー部１８に対し、駆動モータ４０には１つのキー溝４８を形成してもよく、複数のキー溝４８を形成してもよい。また、連結軸１７の外側に歯状の溝を形成して連結軸１７をスプラインシャフトとし、連結部４３の内側に歯状の溝を形成して連結部４３をスプライン軸受としてもよい。   Note that one key groove 48 may be formed in the drive motor 40 for one key portion 18 of the polishing member 10, or a plurality of key grooves 48 may be formed. Alternatively, the connection shaft 17 may be formed as a spline shaft by forming a tooth-shaped groove outside the connection shaft 17, and the connection portion 43 may be formed as a spline bearing by forming a tooth-shaped groove inside the connection portion 43.

＜押圧ユニット＞
押圧ユニット５０は、研磨部材１０と駆動モータ４０との間に位置しており、研磨部材１０をショルダ面１０４、１０６、１０９に向かって押圧するユニットである。押圧ユニット５０は、本体部材５１と、接触部材５２と、コイルばね５３と、保持部材５４と、軸受５５と、圧力調整部材５６とを有している。 <Pressing unit>
The pressing unit 50 is located between the polishing member 10 and the drive motor 40, and is a unit that presses the polishing member 10 toward the shoulder surfaces 104, 106, and 109. The pressing unit 50 has a main body member 51, a contact member 52, a coil spring 53, a holding member 54, a bearing 55, and a pressure adjusting member 56.

本体部材５１は、円筒状の形状を有している。本体部材５１の外周面の研磨部材側の端部には筒状孔１０２に形成された雌ねじ１１２と組み合わせることができる雄ねじ５７が形成されており、この雄ねじ５７を筒状孔１０２の雌ねじ１１２に組み合わせてねじ込むことにより、本体部材５１を筒状孔１０２の開口部分に取り付けることができる。また、本体部材５１の駆動モータ４０側の内周面には雌ねじ５８が形成されており、研磨部材１０側の開口部分には環状の係止部５９を有している。なお、前述したように、本体部材５１における駆動モータ４０の貫通孔４５に対向する部分には、ねじ穴６０が形成されている。   The main body member 51 has a cylindrical shape. A male screw 57 that can be combined with a female screw 112 formed in the cylindrical hole 102 is formed at an end portion of the outer peripheral surface of the main body member 51 on the polishing member side, and the male screw 57 is formed in the female screw 112 of the cylindrical hole 102. By screwing in combination, the main body member 51 can be attached to the opening of the cylindrical hole 102. Further, a female screw 58 is formed on the inner peripheral surface of the main body member 51 on the drive motor 40 side, and has an annular locking portion 59 in an opening portion on the polishing member 10 side. As described above, the screw hole 60 is formed in a portion of the main body member 51 facing the through hole 45 of the drive motor 40.

接触部材５２は、研磨部材１０に接触する部材であって、本体部材５１の内部に軸方向に移動可能に挿入されている。接触部材５２は、研磨部材１０の被押圧部１９と接触する。接触部材５２は環状に形成されており、接触部材５２の外径は本体部材５１の係止部５９の内径よりも大きい。そのため、接触部材５２は、本体部材５１の内部から係止部５９を越えて本体部材５１の外部へ抜け落ちることはない。   The contact member 52 is a member that comes into contact with the polishing member 10 and is inserted inside the main body member 51 so as to be movable in the axial direction. The contact member 52 comes into contact with the pressed portion 19 of the polishing member 10. The contact member 52 is formed in an annular shape, and the outer diameter of the contact member 52 is larger than the inner diameter of the locking portion 59 of the main body member 51. Therefore, the contact member 52 does not fall out of the main body member 51 from the inside of the main body member 51 beyond the locking portion 59.

コイルばね５３は、接触部材５２を介して、研磨部材１０をショルダ面１０４、１０６、１０９に向かって押圧する部材である。コイルばね５３の研磨部材１０側の端部は接触部材５２に固定されており、駆動モータ４０側の端部は保持部材５４に固定されている。また、後述するように、コイルばね５３は接触部材５２、保持部材５４、及び研磨部材１０とともに回転する。なお、前述のとおり、接触部材５２は本体部材５１の外部へ抜け落ちることがないため、コイルばね５３も本体部材５１の外部へ抜け落ちることはない。   The coil spring 53 is a member that presses the polishing member 10 toward the shoulder surfaces 104, 106, and 109 via the contact member 52. The end of the coil spring 53 on the polishing member 10 side is fixed to the contact member 52, and the end on the drive motor 40 side is fixed to the holding member 54. Further, as described later, the coil spring 53 rotates together with the contact member 52, the holding member 54, and the polishing member 10. As described above, since the contact member 52 does not fall out of the main body member 51, the coil spring 53 does not fall out of the main body member 51.

保持部材５４は、コイルばね５３と軸受５５の間に介在する部材であり、コイルばね５３の駆動モータ４０側の端部に固定されている。なお、保持部材５４は、本体部材５１の内部において軸方向に移動可能である。   The holding member 54 is a member interposed between the coil spring 53 and the bearing 55, and is fixed to an end of the coil spring 53 on the drive motor 40 side. Note that the holding member 54 is movable in the axial direction inside the main body member 51.

軸受５５は、コイルばね５３が本体部材５１に対して回転できるようにコイルばね５３を受ける部材である。本実施形態の軸受５５はいわゆるスラスト軸受であって、環状の静止板６１と静止板６１に対して回転する環状の回転板６２を有している。静止板６１は圧力調整部材５６を介して本体部材５１に固定されている。一方、回転板６２は保持部材５４に接続されており、研磨部材１０の回転に伴って、接触部材５２、コイルばね５３、及び保持部材５４とともに回転する。なお、軸受５５は、コイルばね５３を本体部材５１に対して回転可能に受けることができればよく、スラスト軸受に限られない。   The bearing 55 is a member that receives the coil spring 53 so that the coil spring 53 can rotate with respect to the main body member 51. The bearing 55 of the present embodiment is a so-called thrust bearing, and has an annular stationary plate 61 and an annular rotating plate 62 that rotates with respect to the stationary plate 61. The stationary plate 61 is fixed to the main body member 51 via the pressure adjusting member 56. On the other hand, the rotating plate 62 is connected to the holding member 54, and rotates with the contact member 52, the coil spring 53, and the holding member 54 as the polishing member 10 rotates. The bearing 55 is not limited to a thrust bearing as long as it can receive the coil spring 53 rotatably with respect to the main body member 51.

圧力調整部材５６は、コイルばね５３の研磨部材１０に加える力を調整する部材である。圧力調整部材５６は環状であって、外周面には本体部材５１の内周面に形成された雌ねじ５８と組み合わせることができる雄ねじ６３が形成されており、本体部材５１にねじ込まれている。圧力調整部材５６の本体部材５１にねじ込む量を調整することで、本体部材５１に対する圧力調整部材５６の軸方向位置を変更することができる。これにより、コイルばね５３の駆動モータ４０側の端部の軸方向位置が変化し、コイルばね５３が研磨部材１０をショルダ面１０４、１０６、１０９に向かって押圧する圧力を変化させることができる。   The pressure adjusting member 56 is a member that adjusts the force of the coil spring 53 applied to the polishing member 10. The pressure adjusting member 56 is annular, and has a male screw 63 formed on the outer peripheral surface thereof, which can be combined with the female screw 58 formed on the inner peripheral surface of the main body member 51, and is screwed into the main body member 51. By adjusting the amount by which the pressure adjusting member 56 is screwed into the main body member 51, the axial position of the pressure adjusting member 56 with respect to the main body member 51 can be changed. Accordingly, the axial position of the end of the coil spring 53 on the drive motor 40 side changes, and the pressure with which the coil spring 53 presses the polishing member 10 toward the shoulder surfaces 104, 106, and 109 can be changed.

＜使用方法＞
次に、研磨装置１００の使用方法について説明する。はじめに、研磨を行うショルダ面１０４、１０６、１０９全体に所定量の砥粒とオイルをひく。この状態で、研磨部材１０を加工対象の筒状孔１０２に挿入する。第１研磨ショルダ面１０４を研磨する場合は第１研磨部材１０Ａを挿入し、第２研磨ショルダ面１０６を研磨する場合には第２研磨部材１０Ｂを挿入し、第３研磨ショルダ面１０９を研磨する場合には第３研磨部材１０Ｃを挿入する。 <How to use>
Next, a method of using the polishing apparatus 100 will be described. First, a predetermined amount of abrasive grains and oil are applied to the entire shoulder surfaces 104, 106, and 109 to be polished. In this state, the polishing member 10 is inserted into the cylindrical hole 102 to be processed. When polishing the first polishing shoulder surface 104, the first polishing member 10A is inserted. When polishing the second polishing shoulder surface 106, the second polishing member 10B is inserted, and the third polishing shoulder surface 109 is polished. In this case, the third polishing member 10C is inserted.

続いて、押圧ユニット５０を加工対象１０１に取り付ける。押圧ユニット５０の雄ねじ５７を加工対象１０１の雌ねじ１１２に組み合わせて押圧ユニット５０を加工対象１０１にねじ込めば、押圧ユニット５０を加工対象１０１に取り付けることができる。その際、研磨部材１０の被押圧部１９が押圧ユニット５０の接触部材５２に接触し、接触部材５２が本体部材５１の内部に押し込まれる（図２参照）。これにより、研磨部材１０は、接触部材５２を介してコイルばね５３によってショルダ面１０４、１０６、１０９に向かって押圧された状態となる。   Subsequently, the pressing unit 50 is attached to the processing target 101. If the pressing unit 50 is screwed into the processing target 101 by combining the external thread 57 of the pressing unit 50 with the internal thread 112 of the processing target 101, the pressing unit 50 can be attached to the processing target 101. At this time, the pressed portion 19 of the polishing member 10 comes into contact with the contact member 52 of the pressing unit 50, and the contact member 52 is pushed into the main body member 51 (see FIG. 2). As a result, the polishing member 10 is pressed toward the shoulder surfaces 104, 106, 109 by the coil spring 53 via the contact member 52.

なお、本実施形態では、押圧ユニット５０において接触部材５２は本体部材５１の外部へ抜け落ちることはないため、押圧ユニット５０の各構成部材が互いに分離することはない。そのため、本実施形態では、押圧ユニット５０単体で取り扱うことができ、研磨部材１０を交換するなどの作業を容易に行うことができる。   In the present embodiment, since the contact member 52 does not fall out of the main body member 51 in the pressing unit 50, the components of the pressing unit 50 do not separate from each other. Therefore, in the present embodiment, the pressing unit 50 can be handled alone, and operations such as replacement of the polishing member 10 can be easily performed.

続いて、駆動モータ４０を押圧ユニット５０に固定する。前述のとおり、駆動モータ４０の押圧ユニット５０への固定は、固定ボルト４４を用いて行う。その際、研磨部材１０のキー部１８が駆動モータ４０のキー溝４８に挿入されるように、研磨部材１０の角度位置又は駆動モータ４０の出力軸４６の角度位置を調整する。   Subsequently, the drive motor 40 is fixed to the pressing unit 50. As described above, the drive motor 40 is fixed to the pressing unit 50 using the fixing bolt 44. At this time, the angular position of the polishing member 10 or the angular position of the output shaft 46 of the driving motor 40 is adjusted so that the key portion 18 of the polishing member 10 is inserted into the key groove 48 of the driving motor 40.

続いて、駆動モータ４０を駆動して研磨部材１０を回転させる。この際、第１研磨部材１０Ａであれば筒状孔１０２の第１内周面１０３にガイドされながら回転し、第２研磨部材１０Ｂであれば筒状孔１０２の第２内周面１０５にガイドされながら回転し、第３研磨部材１０Ｃであれば筒状孔１０２の第３内周面１０７及び第４内周面１１０にガイドされながら回転する。これにより、各研磨部材１０Ａ、１０Ｂ、１０Ｃは、回転軸が筒状孔１０２の中心軸１１１に常に一致した状態で回転することができる。   Subsequently, the drive motor 40 is driven to rotate the polishing member 10. In this case, the first polishing member 10A rotates while being guided by the first inner peripheral surface 103 of the cylindrical hole 102, and the second polishing member 10B guides the second polishing member to the second inner peripheral surface 105 of the cylindrical hole 102. The third polishing member 10C rotates while being guided by the third inner peripheral surface 107 and the fourth inner peripheral surface 110 of the cylindrical hole 102. Thereby, each of the polishing members 10A, 10B, and 10C can rotate with the rotation axis always coinciding with the central axis 111 of the cylindrical hole 102.

また、前述のとおり、コイルばね５３は研磨部材１０とともに回転しながら研磨部材１０をショルダ面１０４、１０６、１０９に向かって押圧する。これにより、研磨部材１０とショルダ面１０４、１０６、１０９の間の砥粒が周方向に転がりながらショルダ面１０４、１０６、１０９の表面を研磨する。なお、研磨部材１０は、回転軸が筒状孔１０２の中心軸１１１に一致した状態で回転するため、研磨によってショルダ面１０４、１０６、１０９の中心軸が筒状孔１０２の中心軸１１１に対して傾斜するのを防ぐことができる。以上のように、本実施形態によれば、筒状孔１０２のショルダ面１０４、１０６、１０９を研磨することができる。   Further, as described above, the coil spring 53 presses the polishing member 10 toward the shoulder surfaces 104, 106, and 109 while rotating together with the polishing member 10. Thereby, the abrasive grains between the polishing member 10 and the shoulder surfaces 104, 106, 109 grind the surfaces of the shoulder surfaces 104, 106, 109 while rolling in the circumferential direction. Since the polishing member 10 rotates with the rotation axis coinciding with the central axis 111 of the cylindrical hole 102, the central axes of the shoulder surfaces 104, 106, and 109 are aligned with the central axis 111 of the cylindrical hole 102 by polishing. Tilting can be prevented. As described above, according to the present embodiment, the shoulder surfaces 104, 106, and 109 of the cylindrical hole 102 can be polished.

（第２実施形態）
次に、第２実施形態に係る研磨装置２００について説明する。図５は、第２実施形態に係る研磨装置２００の組立一部断面図であって、第１実施形態の図２に相当する。以下では、図５で示す要素のうち、図２で示す要素と同一又は相当するものについては同じ符号を付し、第１実施形態と重複する説明は省略する。なお、本実施形態においても、研磨するショルダ面に応じて研磨部材を交換する。 (2nd Embodiment)
Next, a polishing apparatus 200 according to a second embodiment will be described. FIG. 5 is an assembly partial cross-sectional view of a polishing apparatus 200 according to the second embodiment, and corresponds to FIG. 2 of the first embodiment. In the following, among the elements shown in FIG. 5, the same or corresponding elements as those shown in FIG. In this embodiment, the polishing member is exchanged according to the shoulder surface to be polished.

本実施形態に係る研磨装置２００は、押圧ユニット５０を加工対象１０１への取り付けるための構成が第１実施形態の研磨装置１００と異なる。具体的には、第１実施形態では押圧ユニット５０を加工対象１０１にねじ込むことによって押圧ユニット５０を加工対象１０１に取り付けていたが、本実施形態では取付ボルト７１によって取り付ける。そのため、本実施形態では、加工対象１０１の筒状孔１０２に雌ねじ１１２（図２参照）は形成されておらず、また、押圧ユニット５０の本体部材５１に雄ねじ５７（図２参照）は形成されていない。   The polishing apparatus 200 according to the present embodiment is different from the polishing apparatus 100 of the first embodiment in the configuration for attaching the pressing unit 50 to the processing target 101. Specifically, in the first embodiment, the pressing unit 50 is mounted on the processing target 101 by screwing the pressing unit 50 into the processing target 101, but in the present embodiment, the pressing unit 50 is mounted with the mounting bolt 71. Therefore, in the present embodiment, the female screw 112 (see FIG. 2) is not formed in the cylindrical hole 102 of the processing object 101, and the male screw 57 (see FIG. 2) is formed in the main body member 51 of the pressing unit 50. Not.

図５に示すように、本実施形態では、押圧ユニット５０が軸方向に対して垂直な方向に延びる突起部７２を有しており、この突起部７２に貫通孔７３が形成されている。そして、加工対象１０１にはこの貫通孔７３に対応する位置にねじ穴１１３が形成されている。これにより取付ボルト７１を押圧ユニット５０の貫通孔７３を通って先端を加工対象１０１のねじ穴１１３に組み合わせて締め付けることにより、押圧ユニット５０を加工対象１０１に取り付けることができる。   As shown in FIG. 5, in the present embodiment, the pressing unit 50 has a protrusion 72 extending in a direction perpendicular to the axial direction, and a through hole 73 is formed in the protrusion 72. A screw hole 113 is formed in the processing target 101 at a position corresponding to the through hole 73. Accordingly, the pressing unit 50 can be attached to the processing target 101 by tightening the mounting bolt 71 through the through hole 73 of the pressing unit 50 and fastening the tip to the screw hole 113 of the processing target 101.

本実施形態によれば、押圧ユニット５０を回転させることなく押圧ユニット５０を加工対象１０１に取り付けることができる。つまり、研磨部材１０に対する押圧ユニット５０の周方向位置が変化することなく押圧ユニット５０を取り付けることができる。そのため、押圧ユニット５０に駆動モータ４０を固定したままであっても、研磨部材１０のキー部１８を駆動モータ４０のキー溝４８に挿入させることができる。その結果、押圧ユニット５０に駆動モータ４０を取り付けたまま研磨装置２００を加工対象１０１に取り付けることができ、作業効率を向上させることができる。   According to the present embodiment, the pressing unit 50 can be attached to the processing target 101 without rotating the pressing unit 50. That is, the pressing unit 50 can be attached without changing the circumferential position of the pressing unit 50 with respect to the polishing member 10. Therefore, even if the drive motor 40 is fixed to the pressing unit 50, the key portion 18 of the polishing member 10 can be inserted into the key groove 48 of the drive motor 40. As a result, the polishing apparatus 200 can be attached to the processing object 101 with the drive motor 40 attached to the pressing unit 50, and the working efficiency can be improved.

１０ 研磨部材
１０Ａ 第１研磨部材
１０Ｂ 第２研磨部材
１０Ｃ 第３研磨部材
４０ 駆動モータ
５０ 押圧ユニット
５１ 本体部材
５２ 接触部材
５３ コイルばね
５５ 軸受
５６ 圧力調整部材
５９ 係止部
１００、２００ 研磨装置
１０１ 加工対象
１０２ 筒状孔
１０３ 第１内周面
１０４ 第１研磨ショルダ面
１０５ 第２内周面
１０６ 第２研磨ショルダ面
１０７ 第３内周面
１０９ 第３研磨ショルダ面
１１０ 第４内周面
１１１ 中心軸 Reference Signs List 10 polishing member 10A first polishing member 10B second polishing member 10C third polishing member 40 drive motor 50 pressing unit 51 main body member 52 contact member 53 coil spring 55 bearing 56 pressure adjusting member 59 locking portion 100, 200 polishing device 101 Object 102 Cylindrical hole 103 First inner peripheral surface 104 First polishing shoulder surface 105 Second inner peripheral surface 106 Second polishing shoulder surface 107 Third inner peripheral surface 109 Third polishing shoulder surface 110 Fourth inner peripheral surface 111 Central axis

Claims (5)

加工対象に形成された筒状孔の内周面にガイドされながら回転し、前記筒状孔の中心軸に対して垂直な環状面又は前記筒状孔と同心の円錐面であるショルダ面を研磨する研磨部材と、
前記研磨部材を軸方向に移動可能に保持して前記研磨部材を回転させる駆動モータと、
前記研磨部材と前記駆動モータとの間に位置する押圧ユニットと、を備え、
前記研磨部材は、前記駆動モータと連結する先端部分でのみ保持されており、
前記押圧ユニットは、
前記加工対象における前記筒状孔の開口部分に取り付けられ、前記駆動モータが固定される筒状の本体部材と、
前記本体部材の内部に位置し、前記研磨部材を弾性変形及び保持のがたつきによる回転軸に垂直な方向への変位を許容しつつ前記ショルダ面に向かって押圧するコイルばねと、
前記本体部材に対して回転可能に前記コイルばねを受ける環状の軸受と、を有する研磨装置。 It rotates while being guided by the inner peripheral surface of the cylindrical hole formed in the processing object, and grinds a shoulder surface that is an annular surface perpendicular to the central axis of the cylindrical hole or a conical surface concentric with the cylindrical hole. A polishing member,
A drive motor that rotates the polishing member while holding the polishing member movably in the axial direction,
A pressing unit located between the polishing member and the drive motor,
The polishing member is held only at a tip portion connected to the drive motor,
The pressing unit,
A cylindrical main body member attached to the opening of the cylindrical hole in the processing target and to which the drive motor is fixed,
A coil spring that is located inside the main body member and presses toward the shoulder surface while allowing the polishing member to be displaced in a direction perpendicular to the rotation axis due to elastic deformation and holding backlash .
An annular bearing rotatably receiving the coil spring with respect to the main body member. 前記押圧ユニットは、前記コイルばねと前記研磨部材との間に介在し、前記本体部材の内部に挿入されて軸方向に移動可能な環状の接触部材を有し、
前記本体部材は、前記研磨部材側の開口部分に環状の係止部を有し、
前記接触部材の外径は前記係止部の内径よりも大きい、請求項１に記載の研磨装置。 The pressing unit is interposed between the coil spring and the polishing member, and has an annular contact member that is inserted into the main body member and is movable in the axial direction,
The main body member has an annular locking portion at an opening on the polishing member side,
The polishing apparatus according to claim 1, wherein an outer diameter of the contact member is larger than an inner diameter of the locking portion. 前記押圧ユニットは、前記コイルばねの前記本体部材に対する軸方向位置を変化させることにより、前記コイルばねが前記研磨部材を前記ショルダ面に向かって押圧する圧力を調整することができる圧力調整部材を有する、請求項１又は２に記載の研磨装置。   The pressing unit has a pressure adjusting member that can adjust a pressure at which the coil spring presses the polishing member toward the shoulder surface by changing an axial position of the coil spring with respect to the main body member. The polishing apparatus according to claim 1. 加工対象に形成された筒状孔の内周面にガイドされながら回転し、前記筒状孔の中心軸に対して垂直な環状面又は前記筒状孔と同心の円錐面であるショルダ面を研磨する研磨部材と、前記研磨部材を軸方向に移動可能に保持して前記研磨部材を回転させる駆動モータと、の間に配置され、前記研磨部材を前記ショルダ面に押圧するための押圧ユニットであって、
前記研磨部材は、前記駆動モータと連結する先端部分でのみ保持されており、
当該押圧ユニットは、
前記加工対象における前記筒状孔の開口部分に取り付けられ、前記駆動モータが固定される筒状の本体部材と、
前記本体部材の内部に位置し、前記研磨部材を弾性変形及び保持のがたつきによる回転軸に垂直な方向への変位を許容しつつ前記ショルダ面に向かって押圧するコイルばねと、
前記本体部材に対して回転可能に前記コイルばねを受ける環状の軸受と、を有する押圧ユニット。 It rotates while being guided by the inner peripheral surface of the cylindrical hole formed in the processing object, and grinds a shoulder surface which is an annular surface perpendicular to the central axis of the cylindrical hole or a conical surface concentric with the cylindrical hole. A pressing unit for pressing the polishing member against the shoulder surface, the pressing unit being disposed between the polishing member to be driven and a drive motor for rotating the polishing member while holding the polishing member movably in the axial direction. hand,
The polishing member is held only at a tip portion connected to the drive motor,
The pressing unit is
A cylindrical main body member attached to the opening of the cylindrical hole in the processing target and to which the drive motor is fixed,
A coil spring that is located inside the main body member and presses toward the shoulder surface while allowing the polishing member to be displaced in a direction perpendicular to the rotation axis due to elastic deformation and holding backlash .
A ring bearing that receives the coil spring rotatably with respect to the main body member. 研磨部材を軸方向に移動可能に先端部分でのみ保持し、当該研磨部材を加工対象に形成された筒状孔の内周面でガイドしながら回転させ、前記研磨部材とともに回転するコイルばねによって前記筒状孔の中心軸に対して垂直な環状面又は前記筒状孔と同心の円錐面であるショルダ面に向かって弾性変形及び保持のがたつきによる回転軸に垂直な方向への変位を許容しつつ前記研磨部材を押圧することで、前記ショルダ面を研磨する、研磨方法。 The polishing member is held only at the distal end portion so as to be movable in the axial direction, and the polishing member is rotated while being guided by the inner peripheral surface of the cylindrical hole formed in the object to be processed, and the coil spring is rotated with the polishing member. Displacement in the direction perpendicular to the rotation axis due to elastic deformation and holding backlash toward the annular surface perpendicular to the center axis of the cylindrical hole or the shoulder surface which is a conical surface concentric with the cylindrical hole A polishing method for polishing the shoulder surface by pressing the polishing member while performing polishing.
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