JP3483185B2 - Grooving tool - Google Patents
Grooving toolInfo
- Publication number
- JP3483185B2 JP3483185B2 JP1065697A JP1065697A JP3483185B2 JP 3483185 B2 JP3483185 B2 JP 3483185B2 JP 1065697 A JP1065697 A JP 1065697A JP 1065697 A JP1065697 A JP 1065697A JP 3483185 B2 JP3483185 B2 JP 3483185B2
- Authority
- JP
- Japan
- Prior art keywords
- holding member
- tool
- groove
- end surface
- spherical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Mounting Of Bearings Or Others (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Sliding-Contact Bearings (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、流体軸受の動圧溝
等を加工するための溝加工工具に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a groove machining tool for machining a dynamic pressure groove of a fluid bearing.
【０００２】[0002]
【従来の技術】軸部材を回転自在に支持する軸受とし
て、空気やオイル等の流体を利用した流体軸受が知られ
ている。この流体軸受は、軸部材と、この軸部材を支持
するスリーブ部材から構成され、軸部材の外周面および
スリーブ部材の内周面のいずれか一方またはこれらの双
方に、たとえばヘリングボーン状の溝が形成される。2. Description of the Related Art As a bearing for rotatably supporting a shaft member, a fluid bearing using a fluid such as air or oil is known. This fluid dynamic bearing is composed of a shaft member and a sleeve member supporting the shaft member, and a herringbone-shaped groove, for example, is formed on either or both of the outer peripheral surface of the shaft member and the inner peripheral surface of the sleeve member. It is formed.
【０００３】流体軸受のスリーブ部材の内周面に動圧の
溝を形成するための溝加工工具として、たとえば特開平
４−３４８８６５号公報に開示されたものが存在する。
この公知の溝加工工具は、工具本体と、溝加工を施すた
めの鋼球を備え、鋼球が工具本体の先端部に周方向に間
隔を置いて複数個設けられている。この種の加工工具を
用いて溝加工を行う際には、工具本体は軸線方向に移動
しながら流体軸受のスリーブ部材に対して相対的に回転
され、この相対的回転のときに工具本体の鋼球がスリー
ブ部材の内周面に作用し、これによって、たとえばへリ
ングボーン状の溝がスリーブ部材の内周面に形成され
る。As a groove processing tool for forming a groove for dynamic pressure on the inner peripheral surface of the sleeve member of the fluid dynamic bearing, there is one disclosed in, for example, Japanese Patent Laid-Open No. 348865/1992.
This known grooving tool includes a tool main body and steel balls for performing grooving, and a plurality of steel balls are provided at the tip of the tool main body at intervals in the circumferential direction. When grooving is performed using this type of machining tool, the tool body is rotated relative to the sleeve member of the hydrodynamic bearing while moving in the axial direction. The sphere acts on the inner peripheral surface of the sleeve member, whereby, for example, a herringbone-shaped groove is formed on the inner peripheral surface of the sleeve member.
【０００４】[0004]
【発明が解決しようとする課題】従来においては、工具
本体への鋼球の取付けは、たとえば次のように行われて
おり、この取付様式に関連して次の通りの解決すべき問
題が存在する。図９および図１０を参照して、円筒状の
工具本体２の先端部外周面には凹溝４が形成され、この
凹溝４に周方向に間隔を置いて複数個の鋼球６が固定さ
れる。凹溝４の幅Ｗは鋼球６の外径Ｌよりも若干小さく
設定され、また凹溝４の深さＤは鋼球６の外径Ｌよりも
幾分小さく設定される。鋼球６は、たとえば図１０に示
すとおりにして工具本体２の凹溝４に圧入される。ま
ず、凹溝４に実質上等間隔を置いて複数個の鋼球６を配
置し、次いで鋼球６を配置した工具本体２を、たとえば
プレス加工機のプレス台８に載置し、その後加圧工具１
０を矢印で示すとおりに上下動させて鋼球６に作用さ
せ、このようにして鋼球６が工具本体２の凹溝４に圧入
固定される。Conventionally, the steel balls are attached to the tool body in the following manner, for example, and there are the following problems to be solved in relation to the manner of attachment. To do. With reference to FIGS. 9 and 10, a concave groove 4 is formed on the outer peripheral surface of the tip of the cylindrical tool body 2, and a plurality of steel balls 6 are fixed to the concave groove 4 at intervals in the circumferential direction. To be done. The width W of the groove 4 is set to be slightly smaller than the outer diameter L of the steel ball 6, and the depth D of the groove 4 is set to be slightly smaller than the outer diameter L of the steel ball 6. The steel ball 6 is press-fitted into the concave groove 4 of the tool body 2 as shown in FIG. 10, for example. First, a plurality of steel balls 6 are arranged in the groove 4 at substantially equal intervals, and then the tool main body 2 on which the steel balls 6 are arranged is placed on, for example, a press table 8 of a press machine, and then added. Pressure tool 1
0 is moved up and down as shown by the arrow to act on the steel ball 6, and the steel ball 6 is press-fitted and fixed in the concave groove 4 of the tool body 2 in this manner.
【０００５】しかしながら、従来の取付様式では、上述
したとおり、鋼球６を圧入固定するときに、プレス加工
機のプレス台８および加圧工具１０が鋼球６の一部に加
圧作用し、この加圧作用によって鋼球６の上記一部が変
形する恐れがある。鋼球６の加圧作用を受ける上記一部
は、工具本体２の凹溝４から外方に幾分突出する部分で
あり、この部分は溝加工の際にスリーブ部材の内周面に
作用して溝を形成する部分である。それ故に、鋼球６の
上記一部が変形すると、高精度の溝加工（転造加工）を
行うことができず、スリーブ部材の内周面に形成される
溝の形状が変わり、その結果流体軸受として軸部材を安
定して回転自在に支持することができない。また、鋼球
６を凹溝４に配置して圧入する構成であるため、鋼球６
を工具本体２の周方向に等間隔に配置することが困難で
あり、等間隔に配置することができないときには、スリ
ーブ部材に形成される溝の間隔も不均一となり、流体軸
受として軸部材を安定して回転支持することができな
い。さらに、鋼球６が工具本体２に固定される構成であ
るために、組付け後に鋼球の外径が不適切である、或い
は加工によって鋼球が摩耗した場合には加工工具全体を
破棄しなければならない。However, in the conventional mounting manner, as described above, when the steel ball 6 is press-fitted and fixed, the press table 8 and the pressure tool 10 of the press working machine pressurize a part of the steel ball 6, This pressing action may deform the part of the steel ball 6. The above-mentioned part that receives the pressing action of the steel ball 6 is a part that protrudes somewhat outward from the concave groove 4 of the tool body 2, and this part acts on the inner peripheral surface of the sleeve member during groove processing. Is a portion where a groove is formed. Therefore, if the above-mentioned part of the steel ball 6 is deformed, it is not possible to perform high-precision groove processing (rolling processing), the shape of the groove formed on the inner peripheral surface of the sleeve member changes, and as a result, fluid The shaft member cannot be stably and rotatably supported as a bearing. Further, since the steel ball 6 is arranged in the groove 4 and press-fitted, the steel ball 6
It is difficult to dispose the blades at equal intervals in the circumferential direction of the tool body 2, and when they cannot be arranged at equal intervals, the intervals of the grooves formed in the sleeve member also become non-uniform, which stabilizes the shaft member as a fluid bearing. Then, it cannot be rotationally supported. Further, since the steel ball 6 is fixed to the tool body 2, if the outer diameter of the steel ball is improper after assembly, or if the steel ball is worn by machining, the entire machining tool is discarded. There must be.
【０００６】本発明の目的は、溝加工を施すための球状
体を周方向に実質上等間隔に配置することができ、また
球状体の溝加工を施す部分に組立時に変形が生じること
がない溝加工工具を提供することである。It is an object of the present invention to allow spherical bodies to be grooved to be disposed at substantially equal intervals in the circumferential direction, and the grooved portions of the spherical body will not be deformed during assembly. It is to provide a groove processing tool.
【０００７】本発明の他の目的は、溝加工を施すための
球状体を必要に応じて交換することができる溝加工工具
を提供することである。Another object of the present invention is to provide a grooving tool in which a spherical body for grooving can be replaced as needed.
【０００８】[0008]
【課題を解決するための手段】本発明は、工具本体と、
該工具本体に装着される保持部材と、溝加工するための
複数個の球状体とを具備し、前記保持部材の一端面に
は、周方向に実質上等間隔を置いて複数個の収容凹部が
設けられており、該複数個の収容凹部の各々は、その一
部が前記保持部材の外周面に開口しており、前記複数個
の球状体の各々は、対応する収容凹部に収容され、前記
工具本体の端面と前記保持部材の前記収容凹部によって
固定され、前記保持部材の前記開口を通してその一部が
半径方向外方に突出してることを特徴とする溝加工工具
である。本発明に従えば、保持部材には実質上等間隔を
置いて複数個の収容凹部が設けられ、これら収容凹部に
球状体が収容されるので、複数個の球状体は、収容凹部
に対応して周方向に実質上等間隔に配置される。また、
複数個の球状体は、工具本体に保持部材を装着すること
によって、工具本体の端面と保持部材の収容凹部により
固定されるので、球状体の、保持部材の開口から突出す
る部分、すなわち溝加工する部分に組立時に大きな力が
作用することはなく、この部分に変形が防止される。SUMMARY OF THE INVENTION The present invention comprises a tool body,
A holding member mounted on the tool body and a plurality of spherical bodies for grooving are provided, and one end surface of the holding member has a plurality of accommodating recesses at substantially equal intervals in the circumferential direction. Is provided, each of the plurality of accommodation recesses has a part thereof opening to the outer peripheral surface of the holding member, and each of the plurality of spherical bodies is accommodated in a corresponding accommodation recess, The groove machining tool is characterized in that it is fixed by an end face of the tool body and the accommodation recess of the holding member, and a part thereof projects outward in the radial direction through the opening of the holding member. According to the present invention, the holding member is provided with a plurality of accommodation recesses at substantially equal intervals, and the spherical bodies are accommodated in these accommodation recesses. Therefore, the plurality of spherical bodies correspond to the accommodation recesses. Are arranged at substantially equal intervals in the circumferential direction. Also,
Since the plurality of spherical bodies are fixed by the end face of the tool body and the accommodating recess of the holding member by mounting the holding member on the tool body, the portion of the spherical body protruding from the opening of the holding member, that is, the groove processing A large force does not act on the part to be assembled at the time of assembly, and the deformation is prevented on this part.
【０００９】また本発明は、工具本体と、該工具本体に
装着される保持部材と、溝加工するための複数個の球状
体とを具備し、前記保持部材の一端面には、周方向に間
隔を置いて複数個の収容凹部が設けられており、該複数
個の収容凹部の各々は、その一部が前記保持部材の外周
面に開口しており、前記複数個の球状体の各々は、対応
する収容凹部に回転自在に収容され、前記保持部材の前
記開口を通してその一部が半径方向外方に突出してるこ
とを特徴とする溝加工工具である。本発明に従えば、保
持部材には実質上等間隔を置いて複数個の収容凹部が設
けられ、これら収容凹部に球状体が収容されるので、複
数個の球状体は、収容凹部に対応して周方向に実質上等
間隔に配置される。また、複数個の球状体は、収容凹部
に固定されることなく回転自在に収容されるので、球状
体の大きさ等が不適切である、或いは使用により球状体
が摩耗した場合には、球状体を外して新しいものに取換
えることができる。さらに、球状体が回転自在に収容さ
れるので、組立時に球状体に大きな力を作用させる必要
がなく、組立時に球状体に変形が生じることもない。Further, the present invention comprises a tool main body, a holding member mounted on the tool main body, and a plurality of spherical bodies for grooving. One end surface of the holding member is circumferentially formed. A plurality of accommodating recesses are provided at intervals, each of the accommodating recesses is partially open to the outer peripheral surface of the holding member, and each of the plurality of spherical bodies is The groove machining tool is rotatably accommodated in a corresponding accommodating recess, and a part thereof projects radially outward through the opening of the holding member. According to the present invention, the holding member is provided with a plurality of accommodation recesses at substantially equal intervals, and the spherical bodies are accommodated in these accommodation recesses. Therefore, the plurality of spherical bodies correspond to the accommodation recesses. Are arranged at substantially equal intervals in the circumferential direction. In addition, since a plurality of spherical bodies are rotatably accommodated without being fixed in the accommodating recesses, the spherical bodies are not suitable for the size, etc. You can remove it and replace it with a new one. Furthermore, since the spherical body is rotatably accommodated, it is not necessary to apply a large force to the spherical body during assembly, and the spherical body is not deformed during assembly.
【００１０】[0010]
【発明の実施の形態】図１は、本発明に従う溝加工工具
の第１の実施形態の要部を示す側面図であり、図２は、
図１の溝加工工具を一部分解して示す分解断面図であ
り、図３は、図１の溝加工工具の保持部材の端部を示す
斜視図であり、図４は図１のＩＶ−ＩＶ線から見たとこ
ろを示す断面図である。1 is a side view showing an essential part of a first embodiment of a groove machining tool according to the present invention, and FIG.
FIG. 4 is an exploded cross-sectional view showing a part of the groove machining tool of FIG. 1, FIG. 3 is a perspective view showing an end portion of a holding member of the groove machining tool of FIG. 1, and FIG. 4 is IV-IV of FIG. 1. It is sectional drawing which shows the place seen from the line.
【００１１】図１〜図４において、図示の溝加工工具
は、細長い円柱状の工具本体２２と、工具本体２２に装
着される保持部材２４とを備えている。工具本体２２の
一端面、すなわち先端面２５の中央部には、図２に示す
ように、取付軸部２６が設けられている。取付軸部２６
は工具本体２２の軸線方向に延びており、その先端部の
外周面には雄ねじ部２８が設けられている。工具本体２
２の端面２５は、実質上平坦であり、後述する複数個の
球状体を固定するための片側の壁面を構成する。1 to 4, the illustrated groove machining tool includes an elongated cylindrical tool body 22 and a holding member 24 mounted on the tool body 22. As shown in FIG. 2, a mounting shaft portion 26 is provided at one end surface of the tool body 22, that is, at the center of the tip end surface 25. Mounting shaft 26
Extends in the axial direction of the tool body 22, and a male screw portion 28 is provided on the outer peripheral surface of the tip end portion thereof. Tool body 2
The second end surface 25 is substantially flat and constitutes one wall surface for fixing a plurality of spherical bodies described later.
【００１２】保持部材２４は、工具本体２２と実質上同
一の外径を有する円筒状であり、その一端面３０（工具
本体２２と対向する端面）には、周方向に実質上等間隔
を置いて、すなわち実質上９０度の間隔を置いて４個の
収容凹部３２が形成されている。図３を参照して、各収
容凹部３２は、軸線方向に垂直な面による断面が矩形状
であり、各収容凹部３２の矩形状の面が保持部材２４の
一端面３０に開口し、その矩形状の一側面（保持部材２
４の外周面側に位置する側面）が保持部材２４の外周面
に開口し、保持部材２４の外周面に規定された周面開口
３４は、工具本体２２の一端から軸線方向に直線状に延
びている。この保持部材２４の中央部には、その軸線方
向に直線状に貫通する取付孔３６が形成され、この取付
孔３６の軸線方向の長さ、すなわち保持部材２４の長さ
は、工具本体２２の取付軸部２６の長さよりも小さく設
定されており、したがって、後述する如くして取付軸部
２６を取付孔３６に挿入すると、その先端部、すなわち
雄ねじ部２８は保持部材２４の他端面から外方に突出す
る。The holding member 24 has a cylindrical shape having an outer diameter substantially the same as that of the tool main body 22, and one end surface 30 (end surface facing the tool main body 22) thereof is substantially equally spaced in the circumferential direction. That is, four accommodation recesses 32 are formed at intervals of substantially 90 degrees. With reference to FIG. 3, each accommodation recess 32 has a rectangular cross section taken along a plane perpendicular to the axial direction, and the rectangular surface of each accommodation recess 32 opens into one end surface 30 of the holding member 24 and its rectangular shape. One side of the shape (holding member 2
4 is open to the outer peripheral surface of the holding member 24, and the peripheral surface opening 34 defined on the outer peripheral surface of the holding member 24 extends linearly in the axial direction from one end of the tool body 22. ing. An attachment hole 36 that linearly penetrates in the axial direction of the holding member 24 is formed, and the axial length of the attachment hole 36, that is, the length of the holding member 24 is the same as that of the tool body 22. It is set to be smaller than the length of the mounting shaft portion 26. Therefore, when the mounting shaft portion 26 is inserted into the mounting hole 36 as will be described later, the tip portion thereof, that is, the male screw portion 28 is removed from the other end surface of the holding member 24. Project in one direction.
【００１３】保持部材２４の各収容凹部３２には、図２
および図４に示すように、溝を加工するための球状体３
８が収容される。球状体３８は、加工するスリーブ部材
よりも硬度が大きい材料から形成され、たとえば鋼球か
ら構成することができる。球状体３８と収容凹部３２と
は、本実施形態では、次ぎの関係に設定される。すなわ
ち、収容凹部３２の半径方向の深さＨ１（図３、図４）
は、球状体３８の外径Ｄ１（図４）よりも幾分小さく、
たとえば０．１〜０．１５ｍｍ程度小さく設定されてい
る。したがって、各球状体３８が対応する収容凹部３２
に所要のとおりに収容された状態（球状体３８が収容凹
部３２の、周面開口３４と対向する底面に当接する状
態）にて、球状体３８の一部（周面開口３４に位置する
部位）は保持部材２４の周面開口３４を通して半径方向
外方に突出する。また、収容凹部３２の軸線方向の深さ
Ｈ２（図３）は、球状体３８の外径Ｄ１よりも幾分小さ
く、たとえば１０〜３０μｍ程度小さく設定されてい
る。したがって、球状体３８を収容凹部３２に所要のと
おりに収容した状態（球状体３８が収容凹部３２の、端
面開口４０と対向する底面に当接する状態）にて、球状
体３８の他の一部（端面開口３４に位置する部位）は上
記端面開口４０から軸線方向に幾分突出する。さらに、
収容凹部３２の周方向の幅Ｗ１（図３、図４）は、球状
体３８の外径Ｄ１よりも若干大きく設定されている。し
たがって、球状体３８を収容凹部３２に所要のとおり収
容した状態では、球状体３８は保持部材２４に強固に固
定されることはなく、球状体３８の取外し、交換等を自
由に行うことができる。なお、この周方向の幅Ｗ１が必
要以上に大きくなると、球状体３８の周方向の位置の誤
差が大きくなるという不都合が生じる。In each of the accommodating recesses 32 of the holding member 24, as shown in FIG.
And as shown in FIG. 4, a spherical body 3 for processing the groove.
8 are accommodated. The spherical body 38 is formed of a material having a hardness higher than that of the sleeve member to be processed, and can be formed of, for example, a steel ball. In the present embodiment, the spherical body 38 and the housing recess 32 are set to have the following relationship. That is, the depth H1 of the accommodation recess 32 in the radial direction (FIGS. 3 and 4)
Is slightly smaller than the outer diameter D1 (FIG. 4) of the spherical body 38,
For example, it is set small by about 0.1 to 0.15 mm. Therefore, each spherical body 38 corresponds to the corresponding accommodation recess 32.
In a state where the spherical body 38 is housed as required (a state in which the spherical body 38 is in contact with the bottom surface of the housing recess 32 that faces the peripheral surface opening 34), a part of the spherical body 38 (a portion located in the peripheral surface opening 34). ) Projects radially outward through the peripheral opening 34 of the holding member 24. Further, the depth H2 (FIG. 3) of the accommodation recess 32 in the axial direction is set to be slightly smaller than the outer diameter D1 of the spherical body 38, for example, about 10 to 30 μm. Therefore, in a state where the spherical body 38 is housed in the housing recess 32 as required (a state in which the spherical body 38 contacts the bottom surface of the housing recess 32 facing the end face opening 40), another part of the spherical body 38 is formed. (The portion located at the end face opening 34) projects somewhat from the end face opening 40 in the axial direction. further,
The circumferential width W1 (FIGS. 3 and 4) of the housing recess 32 is set to be slightly larger than the outer diameter D1 of the spherical body 38. Therefore, when the spherical body 38 is housed in the housing recess 32 as required, the spherical body 38 is not firmly fixed to the holding member 24, and the spherical body 38 can be freely removed and replaced. . If the width W1 in the circumferential direction becomes larger than necessary, the error in the position of the spherical body 38 in the circumferential direction becomes large.
【００１４】この溝加工工具は、さらに、保持部材２４
を工具本体２２に固定するための締付部材を備えてい
る。本実施形態の締付部材はナット４２から構成され、
その外形は保持部材２４の外径よりも小さくなってい
る。このナット部材４２は、工具本体２２の取付軸部２
６の雄ねじ部２８に螺合される。The groove machining tool further includes a holding member 24.
Is provided with a tightening member for fixing the tool to the tool body 22. The tightening member of this embodiment includes a nut 42,
The outer shape is smaller than the outer diameter of the holding member 24. The nut member 42 is attached to the mounting shaft portion 2 of the tool body 22.
6 is screwed into the male screw portion 28.
【００１５】この実施形態では、図１〜図３に示すよう
に、保持部材２４の端面３０には、一対の突出部４４が
一体的に設けられている。一対の突出部４４は、相互に
対向して、すなわち実質上１８０度の間隔を置いて配設
され、上記端面３０から軸線方向外方に工具本体２２に
向けて直線状に突出している。一対の突出部４４に対応
して、工具本体２２の端面２５には受部４６（図１にお
いて一方のみ示す）が形成されている。受部４６の形状
は突出部４４の形状に対応しており、工具本体２２に保
持部材２４を装着すると、保持部材２４の突出部４４が
工具本体２２の受部４６に受入れられ、これによって工
具本体２２および保持部材２４の相対的回動が確実に防
止される。なお、突出部４４の対応する受部４６への挿
入を容易にするために、周方向の幅が先端部に向けて漸
次小さくなるようにテーパ状に形成するのが望ましい
（受部４６の形状は、これに対応して、軸線方向の底部
に向けて周方向の幅が漸次小さくなるようにテーパ状に
形成される）。In this embodiment, as shown in FIGS. 1 to 3, a pair of protrusions 44 are integrally provided on the end surface 30 of the holding member 24. The pair of projecting portions 44 are arranged so as to face each other, that is, substantially 180 degrees apart from each other, and linearly project outward from the end surface 30 in the axial direction toward the tool body 22. A receiving portion 46 (only one of which is shown in FIG. 1) is formed on the end surface 25 of the tool body 22 corresponding to the pair of protruding portions 44. The shape of the receiving portion 46 corresponds to the shape of the projecting portion 44, and when the holding member 24 is attached to the tool body 22, the projecting portion 44 of the holding member 24 is received by the receiving portion 46 of the tool body 22, and thereby the tool Relative rotation of the main body 22 and the holding member 24 is reliably prevented. In order to facilitate the insertion of the projecting portion 44 into the corresponding receiving portion 46, it is desirable to form the tapered shape so that the width in the circumferential direction becomes gradually smaller toward the tip portion (the shape of the receiving portion 46). Correspondingly, is formed in a tapered shape such that the width in the circumferential direction becomes gradually smaller toward the bottom in the axial direction).
【００１６】本実施形態では、突出部４４を保持部材２
４に設け、受部４６を工具本体２２に設けているが、こ
れとは反対に、突出部４４を工具本体２２に設けるとと
もに受部４６を保持部材２４に設けるようにすることも
できる。また、突出部４４および受部４６を周方向に２
個設けているが、１個または３個以上設けるようにする
こともできる。In this embodiment, the protrusion 44 is attached to the holding member 2.
4 and the receiving portion 46 is provided on the tool main body 22. On the contrary, it is also possible to provide the projecting portion 44 on the tool main body 22 and the receiving portion 46 on the holding member 24. In addition, the protruding portion 44 and the receiving portion 46 are arranged in the circumferential direction 2
Although one piece is provided, one piece or three or more pieces may be provided.
【００１７】上述した溝加工工具は、次のとおりにして
組付けることができる。主として図２を参照して、ま
ず、工具本体２２の取付軸部２６を保持部材２４の取付
孔３６に挿入し、取付軸部２６の、保持部材２４から突
出する先端部、すなわち雄ねじ部２８にナット４２を螺
合し、このナット４２を締付方向に回動させて工具本体
２２の端面２５と保持部材２４の端面３０とがほぼ当接
する位置まで移動させる。このような位置まで保持部材
２４を移動させると、一対の突出部４４が対応する受部
４６に受入れられ、突出部４４が受部４６に案内されな
がら保持部材２４が軸線方向に工具本体２２に近接する
方向に移動される。The groove machining tool described above can be assembled as follows. Mainly referring to FIG. 2, first, the mounting shaft portion 26 of the tool body 22 is inserted into the mounting hole 36 of the holding member 24, and the tip end portion of the mounting shaft portion 26 protruding from the holding member 24, that is, the male screw portion 28, is inserted. The nut 42 is screwed, and the nut 42 is rotated in the tightening direction to a position where the end surface 25 of the tool body 22 and the end surface 30 of the holding member 24 are substantially in contact with each other. When the holding member 24 is moved to such a position, the pair of projecting portions 44 are received by the corresponding receiving portions 46, and the projecting portions 44 are guided by the receiving portions 46 while the holding member 24 is axially attached to the tool body 22. It is moved in the direction of approaching.
【００１８】次いで、保持部材２４の周面開口３４を通
して各収容凹部３２に球状体３８を挿入し、工具本体２
２の端面２５と収容凹部３２の底面（上記端面２５と対
向する軸線方向の底面）との間に球状体３８を仮保持す
る。ナット４２を適宜回動させて保持部材２４を工具本
体２２に近接および離隔する方向に移動調整することに
よって、球状体３８を容易に仮保持することができる。Next, the spherical body 38 is inserted into each accommodation recess 32 through the peripheral surface opening 34 of the holding member 24, and the tool main body 2
The spherical body 38 is temporarily held between the second end surface 25 and the bottom surface of the accommodation recess 32 (the bottom surface in the axial direction facing the end surface 25). The spherical body 38 can be easily temporarily held by rotating the nut 42 appropriately to move and adjust the holding member 24 in the direction of approaching and separating from the tool body 22.
【００１９】しかる後、ナット４２を締付方向に強く回
動させて保持部材２４を工具本体２２に固定する。この
ように保持部材２４を固定すると、球状体３８の外径Ｄ
１が収容凹部３２の軸線方向の深さＨ２よりも幾分大き
いので、球状体３８は工具本体２２の端面２５と収容凹
部３２の軸線方向の底面との間に強固に挟持され、これ
らによって確実に固定される。球状体３８を固定する
際、工具本体２２および保持部材２４は、工具本体２２
の軸線方向に球状体３８に作用するのみであり、したが
って球状体３８の、保持部材２４の周面開口３４から半
径方向に突出する一部には、実質上外力が作用すること
はなく、球状体３８の上記一部の変形が確実に防止され
る。また、球状体３８は、予め保持部材２４に形成され
た収容凹部３２に挿入されるので、球状体３８の配置間
隔は収容凹部３２の間隔に対応し、収容凹部３２を高精
度に形成することによって球状体３８を等間隔に配置す
ることができる。After that, the nut 42 is strongly rotated in the tightening direction to fix the holding member 24 to the tool body 22. When the holding member 24 is fixed in this manner, the outer diameter D of the spherical body 38
Since 1 is somewhat larger than the axial depth H2 of the housing recess 32, the spherical body 38 is firmly sandwiched between the end surface 25 of the tool body 22 and the axial bottom surface of the housing recess 32, and these ensure Fixed to. When fixing the spherical body 38, the tool body 22 and the holding member 24 are
Of the spherical body 38, and therefore, the portion of the spherical body 38 projecting radially from the peripheral surface opening 34 of the holding member 24 is not substantially subjected to an external force. The deformation of the part of the body 38 is reliably prevented. Further, since the spherical bodies 38 are inserted into the accommodation recesses 32 formed in the holding member 24 in advance, the arrangement intervals of the spherical bodies 38 correspond to the intervals between the accommodation recesses 32, and the accommodation recesses 32 can be formed with high accuracy. Thus, the spherical bodies 38 can be arranged at equal intervals.
【００２０】上述した溝加工工具は、ナット４２を締付
方向と反対方向に回動させることによって、図２に示す
とおりに容易に分解することができる。そして、このよ
うに分解することによって、工具本体２２と保持部材２
４との球状体３８の挟持が解除され、収容凹部３２に収
容された球状体３８を取外すことができる。それ故に、
組付けた後複数個の球状体３８の大きさが不揃いであ
る、或いは使用によって球状体３８が摩耗した場合等に
おいては、このように分解することによって球状体３８
を交換することができる。The groove machining tool described above can be easily disassembled as shown in FIG. 2 by rotating the nut 42 in the direction opposite to the tightening direction. Then, by disassembling in this way, the tool body 22 and the holding member 2
The holding of the spherical body 38 with respect to 4 is released, and the spherical body 38 housed in the housing recess 32 can be removed. Therefore,
When the plurality of spherical bodies 38 are not uniform in size after being assembled, or when the spherical bodies 38 are worn due to use, the spherical bodies 38 are decomposed in this way.
Can be replaced.
【００２１】上述した形態では、収容凹部３２の周方向
の幅Ｗ１が球状体３８の外径Ｄ１よりも若干大きく設定
され、工具本体２２の端面２５と保持部材２４の収容凹
部３２によって球状体３８が仮保持される構成である
が、これに代えて、次のとおりに構成することができ
る。すなわち、収容凹部３２の周方向の幅Ｗ１を球状体
３８の外径Ｄ１よりも若干小さく、たとえば１０〜３０
μｍ程度小さく設定し、球状体３８を収容凹部３２に直
接仮保持するように構成することもできる。このように
構成した場合には、球状体３８の交換が可能であるとと
もに、それらの組込みも容易となる。In the above-mentioned embodiment, the circumferential width W1 of the accommodating recess 32 is set to be slightly larger than the outer diameter D1 of the spherical body 38, and the spherical body 38 is formed by the end surface 25 of the tool body 22 and the accommodating recess 32 of the holding member 24. However, instead of this, it can be configured as follows. That is, the circumferential width W1 of the housing recess 32 is slightly smaller than the outer diameter D1 of the spherical body 38, for example, 10 to 30.
It is also possible to set it to be about μm smaller and to temporarily hold the spherical body 38 directly in the accommodation recess 32. With such a configuration, the spherical bodies 38 can be replaced, and they can be easily assembled.
【００２２】図５は、保持部材の変形例を示す分解斜視
図である。図５を参照して、図示の保持部材５２は、第
１部材５４と第２部材５６から構成されている。第１部
材５４は短円柱状であり、その外周面には、周方向に実
質上等間隔を置いて４個の収容溝５８が形成されてい
る。各収容溝５８は、その軸線方向に対して実質上垂直
な断面が矩形状であり、第１部材５４の一端から他端ま
で延びている。この第１部材５４の中央部には、これを
貫通して第１貫通孔６０が形成され、またその一端面に
は、軸線方向外方に突出する一対の突出部６２が一体的
に設けられている。また、第２部材５６は、第１部材５
４と実質上同一の外径を有する短円筒状であり、その中
央部にはこれを貫通して第２貫通孔６４が形成されてい
る。第２部材５６は第１部材５４の他面（突出部６２が
設けられている面と反対の面）側に配設され、このよう
に両者を配設すると、第１および第２貫通孔６０，６４
は連続した取付孔を形成し、また第１部材５４の収容溝
５８および第２部材５６の端面６６（第１部材５４の他
端面と対向する端面）は、球状体３８（図２、図４）を
収容する収容凹部を規定する。なお、この変形例におい
ても、収容溝５８の軸線方向の長さＬ１は、球状体３８
の外径Ｄ１（図４）よりも幾分小さく、たとえば１０〜
３０μｍ程度小さく設定される。FIG. 5 is an exploded perspective view showing a modified example of the holding member. With reference to FIG. 5, the illustrated holding member 52 is composed of a first member 54 and a second member 56. The first member 54 is in the shape of a short cylinder, and four accommodation grooves 58 are formed on the outer peripheral surface thereof at substantially equal intervals in the circumferential direction. Each accommodation groove 58 has a rectangular cross section that is substantially perpendicular to the axial direction, and extends from one end to the other end of the first member 54. A first through hole 60 is formed in the central portion of the first member 54 so as to penetrate therethrough, and a pair of projecting portions 62 projecting outward in the axial direction are integrally provided on one end surface thereof. ing. In addition, the second member 56 is the first member 5
4 is a short cylinder having an outer diameter substantially the same as that of No. 4, and a second through hole 64 is formed in the central portion thereof so as to penetrate therethrough. The second member 56 is arranged on the other surface side (the surface opposite to the surface on which the protruding portion 62 is provided) of the first member 54. When both are arranged in this manner, the first and second through holes 60 are formed. , 64
Form a continuous mounting hole, and the receiving groove 58 of the first member 54 and the end surface 66 of the second member 56 (the end surface facing the other end surface of the first member 54) are spherical bodies 38 (FIGS. 2 and 4). ) Is defined. Also in this modified example, the length L1 of the accommodation groove 58 in the axial direction is determined by the spherical body 38.
Somewhat smaller than the outer diameter D1 of FIG.
It is set small by about 30 μm.
【００２３】このような保持部材５２は、図１〜図４に
おける保持部材２４に代えて用いることができる。そし
て、この場合には、球状体３８は対応する収容溝５８に
収容され、ナットを締付けることによって、工具本体２
２の端面２５（図２）と第２部材５６の端面６６との間
に強固に挟持され、これによって工具本体２２および保
持部材２４に固定される。この変形例では、収容溝５８
を有する第１部材５４と短円筒状の第２部材５６より保
持部材５２を構成しているので、図１〜図４の保持部材
２４に比して、収容凹部の一部を規定する収容溝５８の
加工が容易となる。Such a holding member 52 can be used in place of the holding member 24 shown in FIGS. Then, in this case, the spherical body 38 is housed in the corresponding housing groove 58, and by tightening the nut, the tool body 2
The second end surface 25 (FIG. 2) and the end surface 66 of the second member 56 are firmly sandwiched and thereby fixed to the tool body 22 and the holding member 24. In this modified example, the accommodation groove 58
Since the holding member 52 is composed of the first member 54 having the above and the second member 56 having a short cylindrical shape, as compared with the holding member 24 of FIGS. 1 to 4, the holding groove that defines a part of the holding recess. Processing of 58 becomes easy.
【００２４】上述した実施形態では、球状体３８が工具
本体２２と保持部材２４（５２）の収容凹部３２によっ
て固定される構成であるが、このように固定することに
代えて、上記収容凹部に回転自在に収容するように構成
することもでき、このような場合には、たとえば図６お
よび図７に示す保持部材を用いることができる。In the above-described embodiment, the spherical body 38 is fixed to the tool main body 22 and the receiving recess 32 of the holding member 24 (52), but instead of fixing in this way, the spherical recess 38 is inserted into the receiving recess. It may be configured to be rotatably accommodated. In such a case, for example, the holding member shown in FIGS. 6 and 7 can be used.
【００２５】図６および図７を参照して、図示の保持部
材１０２は、工具本体２２（図１、図２）と実質上同一
の外径を有する円筒状であり、その一端面１０４には、
周方向に実質上等間隔を置いて４個の収容凹部１０６が
形成されている。各収容凹部１０６は、円筒状であり、
各収容凹部１０６の略円形状の開口面が保持部材１０２
の一端面１０４に開口し、各収容凹部１０６の側周面の
一部が保持部材１０２の外周面に矩形状に開口し、保持
部材１０２の外周面に規定された周面開口１０８は、保
持部材１０２の一端から軸線方向に直線状に延びてい
る。保持部材１０２の中央部には、その軸線方向に直線
状に貫通する取付孔１１０が形成されている。Referring to FIGS. 6 and 7, the illustrated holding member 102 has a cylindrical shape having an outer diameter substantially the same as that of the tool main body 22 (FIGS. 1 and 2), and one end surface 104 thereof has ,
Four accommodation recesses 106 are formed at substantially equal intervals in the circumferential direction. Each accommodation recess 106 has a cylindrical shape,
The substantially circular opening surface of each accommodation recess 106 is the holding member 102.
To the one end surface 104 of the holding recess 102, a part of the side peripheral surface of each accommodation recess 106 opens to the outer peripheral surface of the holding member 102 in a rectangular shape, and the peripheral surface opening 108 defined on the outer peripheral surface of the holding member 102 holds The member 102 extends linearly in the axial direction from one end of the member 102. A mounting hole 110 is formed in the center of the holding member 102 so as to linearly penetrate therethrough in the axial direction.
【００２６】保持部材１０２の各収容凹部１０６には、
図７に示すように、溝を加工するための球状体１１２が
収容される。この形態の保持部材１０２では、球状体１
１２と収容凹部１０６とは、次ぎの関係に設定される。
すなわち、収容凹部１０６の軸線方向の深さＨ３（図
６）は、球状体１１２の外径Ｄ２（図７）よりも若干大
きく設定されている。したがって、各球状体１１２が対
応する収容凹部１０６に所要のとおりに収容された状態
にて、球状体１１２の一部が保持部材１０２の端面１０
４から軸線方向外方に突出することはない。また、収容
凹部１０６の内径Ｗ２（図６）は、球状体１１２の外径
Ｄ２よりも若干大きく設定されている。したがって、球
状体１１２を収容凹部１０６に所要のとおりに収容した
状態にて、球状体１１２は収容凹部１０６内にて回動自
在となり、収容凹部１０６の、保持部材１０２の端面１
０４に開放する開口を通して、球状体１１２を収容凹部
３８内に装着し、また収容凹部１０６から取出すことが
できる。また、球状体１１２を収容凹部１０６に収容し
た状態においては、球状体１１２の一部は、保持部材１
０２の周面開口１０８から半径方向に幾分突出するよう
に構成されている。In each accommodation recess 106 of the holding member 102,
As shown in FIG. 7, a spherical body 112 for processing the groove is accommodated. In the holding member 102 of this form, the spherical body 1
12 and the housing recess 106 are set to have the following relationship.
That is, the depth H3 (FIG. 6) of the accommodation recess 106 in the axial direction is set to be slightly larger than the outer diameter D2 (FIG. 7) of the spherical body 112. Therefore, in a state where each spherical body 112 is accommodated in the corresponding accommodating concave portion 106 as required, a part of the spherical body 112 is part of the end surface 10 of the holding member 102.
4 does not project outward in the axial direction. The inner diameter W2 (FIG. 6) of the housing recess 106 is set to be slightly larger than the outer diameter D2 of the spherical body 112. Therefore, with the spherical body 112 housed in the housing recess 106 as required, the spherical body 112 becomes rotatable in the housing recess 106, and the end surface 1 of the holding member 102 of the housing recess 106 is rotated.
The spherical body 112 can be mounted in the housing recess 38 and taken out of the housing recess 106 through an opening opening to the housing 04. Further, when the spherical body 112 is housed in the housing recess 106, a part of the spherical body 112 is held by the holding member 1.
It is configured to project somewhat from the peripheral opening 108 of No. 02 in the radial direction.
【００２７】保持部材１０２の端面１０４には、一対の
突出部１１４が一体的に設けられている。一対の突出部
１１４は、図１〜図４における突出部と実質上同一の構
成でよく、かかる一対の突出部１１４は、工具本体２２
に形成された受部４６（図１）に受入れられる。A pair of protrusions 114 are integrally provided on the end surface 104 of the holding member 102. The pair of projecting portions 114 may have substantially the same configuration as the projecting portions in FIGS. 1 to 4, and the pair of projecting portions 114 may be the tool body 22.
It is received in the receiving portion 46 (FIG. 1) formed in the.
【００２８】このような保持部材１０２は、たとえば、
次のとおりにして工具本体に組付けることができる。な
お、保持部材１０２が組付けられる工具本体は、図１お
よび図２に示す工具本体２２と実質上同一の構成でよ
く、工具本体２２については図１および図２の参照番号
を付して説明する。Such a holding member 102 is, for example,
It can be assembled to the tool body as follows. The tool body to which the holding member 102 is attached may have substantially the same configuration as the tool body 22 shown in FIGS. 1 and 2, and the tool body 22 will be described with reference numerals of FIGS. 1 and 2. To do.
【００２９】組付けるには、まず、保持部材１０２の収
容凹部１０６に球状体１１２を収容する。球状体１１２
の外径Ｄ２が収容凹部１０６の内径Ｗ２よりも若干小さ
いので、保持部材１０２の端面１０４の開口を通して球
状体１１２を収容凹部１０６に容易に収容することがで
きる。For assembly, first, the spherical body 112 is housed in the housing recess 106 of the holding member 102. Sphere 112
Since the outer diameter D2 is slightly smaller than the inner diameter W2 of the housing recess 106, the spherical body 112 can be easily housed in the housing recess 106 through the opening of the end surface 104 of the holding member 102.
【００３０】次いで、工具本体２２の取付軸部２６を保
持部材１０２の取付孔１１０に挿入し、取付軸部２６
の、保持部材１０２から突出する先端部にナット４２
（図１、図２）を螺合し、このナット４２を締付方向に
回動させて保持部材１０２を工具本体２２に固定する。
このように保持部材２４を固定すると、球状体１１２の
外径Ｄ２が収容凹部１０６の軸線方向の深さＨ３よりも
若干小さいので、工具本体２２の端面２５と保持部材１
０２の端面１０４とが圧接される。また、保持部材１０
２の一対の突出部１１４が工具本体２２の受部４６に受
入れられ、これによって工具本体２２と保持部材１０２
との相対的回動が確実に防止される。このような装着状
態においては、球状体１１２は収容凹部１０６に回動自
在に、すなわち収容凹部１０６の軸線方向および半径方
向に若干の範囲に渡って移動自在に保持される。なお、
この移動可能な範囲が必要以上に大きくなると、溝加工
時に球状体１１２が移動し、高精度な溝加工が困難とな
る不都合が生じる。球状体１１２を組込む際、球状体１
１２には外力が実質上作用せず、球状体１１２に変形が
生じることはない。また、球状体１１２は、予め保持部
材１０２に形成された収容凹部１０６に挿入されるの
で、球状体１１２の配置間隔は収容凹部１０６の間隔に
対応し、収容凹部１０６を高精度に形成することによっ
て球状体１０６を等間隔に配置することができる。Next, the mounting shaft portion 26 of the tool body 22 is inserted into the mounting hole 110 of the holding member 102, and the mounting shaft portion 26 is inserted.
Of the nut 42 on the tip portion protruding from the holding member 102.
(FIGS. 1 and 2) are screwed together, and the nut 42 is rotated in the tightening direction to fix the holding member 102 to the tool body 22.
When the holding member 24 is fixed in this way, the outer diameter D2 of the spherical body 112 is slightly smaller than the axial depth H3 of the accommodating recess 106, so the end surface 25 of the tool body 22 and the holding member 1 are retained.
The end surface 104 of No. 02 is pressed. Also, the holding member 10
Two pairs of protrusions 114 are received in the receiving portion 46 of the tool body 22, whereby the tool body 22 and the holding member 102.
Relative rotation with respect to is reliably prevented. In such a mounted state, the spherical body 112 is rotatably held in the accommodating recess 106, that is, movably in a slight range in the axial direction and the radial direction of the accommodating recess 106. In addition,
If this movable range becomes unnecessarily large, the spherical body 112 will move during the groove processing, which will make it difficult to perform highly accurate groove processing. When incorporating the spherical body 112, the spherical body 1
An external force does not substantially act on 12 and the spherical body 112 is not deformed. Further, since the spherical bodies 112 are inserted into the accommodation recesses 106 formed in the holding member 102 in advance, the arrangement intervals of the spherical bodies 112 correspond to the intervals of the accommodation recesses 106, and the accommodation recesses 106 can be formed with high accuracy. Thus, the spherical bodies 106 can be arranged at equal intervals.
【００３１】上述した溝加工工具は、ナット４２を締付
方向と反対方向に回動させることによって、容易に分解
することができる。このように分解すると、球状体１１
２は収容凹部１０６に回動自在に収容されているのみで
あるので、保持部材１０２の端面１０４の開口を通し
て、収容凹部１０６に収容された球状体１１２を取外す
ことができる。それ故に、組付けた後複数個の球状体１
１２の大きさが不揃いである、或いは使用によって球状
体１１２が摩耗した場合等においては、このように分解
することによって球状体１１２を交換することができ
る。The groove machining tool described above can be easily disassembled by rotating the nut 42 in the direction opposite to the tightening direction. When decomposed in this way, the spherical body 11
Since 2 is only rotatably accommodated in the accommodation recess 106, the spherical body 112 accommodated in the accommodation recess 106 can be removed through the opening of the end surface 104 of the holding member 102. Therefore, after assembly, a plurality of spherical bodies 1
When the sizes of 12 are not uniform or the spherical body 112 is worn due to use, the spherical body 112 can be replaced by disassembling in this way.
【００３２】図６および図７に示す上述した形態では、
工具本体２２の端面２５と保持部材１０２の端面１０４
とが圧接される構成であるが、これに代えて、保持部材
１０２の突出部の先端面と工具本体２２の収容凹部４６
の底面とが圧接されるように構成することもできる。こ
のように構成した場合においても、球状体１１２を収容
凹部１０６に回動自在に収容することができ、上述した
と同様の効果が達成される。なお、このように構成した
場合には、保持部材１０２の突出部１１４の先端面と工
具本体２２の受部４６の底面が圧接した状態において、
工具本体２２の端面２５と保持部材１０２の収容凹部１
０６の底面との間隔を球状体１１２の外径Ｄ２よりも若
干大きく設定することが重要である。In the above-described form shown in FIGS. 6 and 7,
The end surface 25 of the tool body 22 and the end surface 104 of the holding member 102
However, instead of this, the tip end surface of the projecting portion of the holding member 102 and the housing recess 46 of the tool body 22 are replaced.
It can also be configured to be pressed against the bottom surface of the. Even in the case of such a configuration, the spherical body 112 can be rotatably housed in the housing recess 106, and the same effect as described above is achieved. In addition, in the case of such a configuration, in a state where the tip end surface of the protruding portion 114 of the holding member 102 and the bottom surface of the receiving portion 46 of the tool body 22 are in pressure contact with each other,
The end face 25 of the tool body 22 and the housing recess 1 of the holding member 102
It is important to set the distance from the bottom surface of 06 to be slightly larger than the outer diameter D2 of the spherical body 112.
【００３３】保持部材１０２に関しても、図５に示すと
同様に、円筒状の収容溝が形成された第１部材と短円筒
状の第２部材から構成し、上記収容溝と第２部材の端面
とによって収容凹部を規定するように構成することがで
き、このように構成することによって、図６および図７
に示す一体的形態に比してその加工が容易となる。Similarly to the holding member 102 shown in FIG. 5, the holding member 102 is composed of a first member having a cylindrical accommodation groove formed therein and a short cylindrical second member, and the end surfaces of the accommodation groove and the second member. Can be configured so as to define the accommodating concave portion, and with such a configuration, as shown in FIGS.
The processing is easier than the integrated form shown in FIG.
【００３４】上述した溝加工工具は、たとえば、図８に
示す流体軸受のスリーブ部材２０２の内周面に動圧溝と
してのへリングボーン状の溝２０４を形成するのに用い
ることができる。スリーブ部材２０２の内周面には、へ
リングボーン状の溝２０４が形成される部位に対応し
て、この部位が残りの部位に対して幾分半径方向内方に
突出しているのが望ましく、かく構成することによっ
て、加工工具の球状体３８（１１２）はスリーブ部材２
０２の内方に突出する部位に作用するようになる。スリ
ーブ部材２０２に溝加工を施すときには、たとえば、ス
リーブ部材２０２は、加工機械のチャック（図示せず）
に固定される。溝加工工具は、加工機械の工具保持手段
（図示せず）に固定され、工具保持手段がスリーブ部材
４２に対して軸線方向に移動しながら上記軸線方向に対
して垂直な周方向に回動され、かく工具保持手段を移動
させることによって、図８に示す形状の溝２０４が形成
される。上述した加工工具によって溝加工を行うと、球
状体３８（１１２）の、工具本体２２から半径方向外方
に突出する上記一部が実質上変形していないので、溝２
０４の加工を高精度に行うことができる。かく加工され
たスリーブ部材２０２は、その内側に収容される軸部材
（図示せず）とによって流体軸受を構成し、スリーブ部
材２０２と軸部材との間に介在される流体として、磁性
流体、オイル、空気等が利用される。そして、このよう
な流体軸受は、たとえば各種モータの軸部材を相対的に
回転自在に支持する軸受として好都合に適用することが
できる。The groove machining tool described above can be used, for example, to form a herringbone-shaped groove 204 as a dynamic pressure groove on the inner peripheral surface of the sleeve member 202 of the fluid bearing shown in FIG. It is desirable that the inner peripheral surface of the sleeve member 202 corresponds to a portion where the herringbone-shaped groove 204 is formed, and that this portion projects somewhat inward in the radial direction with respect to the remaining portion. With this structure, the spherical body 38 (112) of the machining tool is made to be the sleeve member 2
02 acts on the part protruding inward. When grooving the sleeve member 202, for example, the sleeve member 202 is a chuck (not shown) of a processing machine.
Fixed to. The groove machining tool is fixed to a tool holding means (not shown) of the machining machine, and the tool holding means is rotated in a circumferential direction perpendicular to the axial direction while moving in the axial direction with respect to the sleeve member 42. By thus moving the tool holding means, the groove 204 having the shape shown in FIG. 8 is formed. When grooving is performed using the above-described machining tool, the above-mentioned part of the spherical body 38 (112) that projects radially outward from the tool body 22 is not substantially deformed.
The machining of 04 can be performed with high accuracy. The thus processed sleeve member 202 constitutes a fluid bearing with a shaft member (not shown) housed inside the sleeve member 202, and a magnetic fluid or an oil is used as a fluid interposed between the sleeve member 202 and the shaft member. , Air, etc. are used. Then, such a fluid bearing can be conveniently applied as a bearing that rotatably supports shaft members of various motors, for example.
【００３５】以上、本発明に従う溝加工工具の実施形態
について説明したが、本発明は上述した実施形態に限定
されるものではなく、本発明の範囲を逸脱することなく
種々の変形乃至修正が可能である。Although the embodiments of the groove machining tool according to the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and corrections can be made without departing from the scope of the present invention. Is.
【００３６】たとえば、図示の形態では、保持部材２４
（５２、１０２）に周方向に間隔を置いて４個の収容凹
部３２（１０６）を設けているが、４個に限定されるも
のではなく、２個または３個、或いは５個以上設けるこ
ともできるが、加工時に生じる工具本体２２の変形を考
慮すると、２個、４個、６個等と偶数個設けるのが望ま
しい。また、収容凹部３２（１０６）の形状は、矩形状
や円筒形状に限らず、球状体３８（１１２）の周方向の
位置と保持体２４（５２，１０２）からの突出量の確保
が行えれば、他の形状でもよく、たとえばスリット形状
であってもよい。For example, in the illustrated embodiment, the holding member 24
Although four accommodation recesses 32 (106) are provided at (52, 102) at intervals in the circumferential direction, the number is not limited to four, and two, three, or five or more may be provided. However, considering the deformation of the tool body 22 that occurs during machining, it is desirable to provide an even number such as 2, 4, 6 or the like. Further, the shape of the accommodating recess 32 (106) is not limited to a rectangular shape or a cylindrical shape, and the circumferential position of the spherical body 38 (112) and the amount of protrusion from the holding body 24 (52, 102) can be secured. However, it may have another shape, for example, a slit shape.
【００３７】[0037]
【発明の効果】本発明の請求項１の溝加工工具によれ
ば、保持部材には実質上等間隔を置いて複数個の収容凹
部が設けられ、これら収容凹部に球状体が収容されるの
で、複数個の球状体は、収容凹部に対応して周方向に実
質上等間隔に配置される。また、複数個の球状体は、工
具本体に保持部材を装着することによって、工具本体の
端面と保持部材の収容凹部により固定されるので、球状
体の、保持部材の開口から突出する部分、すなわち溝加
工する部分に組立時に大きな力が作用することはなく、
この部分に変形が防止される。また、工具本体および保
持部材のいずれか一方に突出部が設けられ、それらの他
方に受部が設けられているので、工具本体と保持部材と
の相対的回動を確実に防止することができる。 According to the groove machining tool of the first aspect of the present invention, the holding member is provided with a plurality of accommodating recesses at substantially equal intervals, and the spherical bodies are accommodated in these accommodating recesses. The plurality of spherical bodies are arranged at substantially equal intervals in the circumferential direction corresponding to the accommodation recess. Further, since the plurality of spherical bodies are fixed by the end face of the tool body and the accommodating recess of the holding member by mounting the holding member on the tool body, the portion of the spherical body protruding from the opening of the holding member, that is, No large force is applied to the grooved part during assembly,
Deformation is prevented in this portion. In addition, the tool body and
Protrusions are provided on either one of the holding members and
Since the receiving part is provided on one side,
Relative rotation can be reliably prevented.
【００３８】また本発明の請求項２の溝加工工具によれ
ば、保持部材が、収容溝を有する第１部材と、収容溝と
協働して収容凹部を規定する第２部材から構成されてい
るので、収容凹部の加工が容易となり、高精度の収容凹
部を容易に形成することができる。According to the groove processing tool of the second aspect of the present invention, the holding member includes the first member having the accommodation groove and the second member which cooperates with the accommodation groove to define the accommodation recess. Therefore, the accommodation recess can be easily processed, and the highly accurate accommodation recess can be easily formed.
【００３９】 また本発明の請求項３の溝加工工具によ
れば、保持部材には実質上等間隔を置いて複数個の収容
凹部が設けられ、これら収容凹部に球状体が収容される
ので、複数個の球状体は、収容凹部に対応して周方向に
実質上等間隔に配置される。また、複数個の球状体は、
収容凹部に固定されることなく回転自在に収容されるの
で、球状体の大きさ等が不適切である、或いは使用によ
り球状体が摩耗した場合には、球状体を外して新しいも
のに取換えることができる。さらに、球状体が回転自在
に収容されるので、組立時に球状体に大きな力を作用さ
せる必要がなく、組立時に球状体に変形が生じることも
ない。また、工具本体および保持部材のいずれか一方に
突出部が設けられ、それらの他方に受部が設けられてい
るので、工具本体と保持部材との相対的回動を確実に防
止することができる。 According to the groove machining tool of claim 3 of the present invention, the holding member is provided with a plurality of accommodation recesses at substantially equal intervals, and the spherical bodies are accommodated in these accommodation recesses. The plurality of spherical bodies are arranged at substantially equal intervals in the circumferential direction corresponding to the accommodation recesses. Also, a plurality of spherical bodies,
Since it is rotatably accommodated without being fixed in the accommodating recess, if the size of the spherical body is inappropriate, or if the spherical body is worn due to use, remove the spherical body and replace it with a new one. be able to. Furthermore, since the spherical body is rotatably accommodated, it is not necessary to apply a large force to the spherical body during assembly, and the spherical body is not deformed during assembly. In addition, either the tool body or the holding member
Protruding parts are provided, and receiving parts are provided on the other of them.
Therefore, the relative rotation between the tool body and the holding member can be securely prevented.
You can stop.
【００４０】[0040]
【００４１】 また本発明の請求項４の溝加工工具によ
れば、突出部の先端面と受部の底面とが当接する、ある
いは工具本体の端面と保持部材の端面とが当接するの
で、球状体に外力が実質上作用せず、球状体を収容凹部
に回転自在に収容することができる。Further, according to the groove machining tool of the fourth aspect of the present invention, since the tip end surface of the projecting portion and the bottom surface of the receiving portion abut, or the end surface of the tool body and the end surface of the holding member abut, a spherical shape is obtained. An external force does not substantially act on the body, and the spherical body can be rotatably housed in the housing recess.
【００４２】 また本発明の請求項５の溝加工工具によ
れば、収容凹部が円筒状であるので、球状体を回転自在
に収容することができ、また保持部材の周面に開口が形
成されているので、球状体の一部はこの開口を通して半
径方向外方に突出し、この突出部が溝加工のための工具
として機能する。According to the groove machining tool of claim 5 of the present invention, since the accommodating recess is cylindrical, the spherical body can be rotatably accommodated, and an opening is formed in the peripheral surface of the holding member. As a result, a part of the spherical body projects radially outward through this opening, and this projection functions as a tool for grooving.
【００４３】 また本発明の請求項６の溝加工工具によ
れば、保持部材が、収容溝が形成された第１部材と、収
容溝と協働して収容凹部を規定する第２部材から構成さ
れているので、請求項２の溝加工工具と同様に、収容凹
部を比較的容易に高精度に形成することができる。According to the sixth aspect of the groove machining tool of the present invention, the holding member includes the first member having the accommodation groove formed therein and the second member which cooperates with the accommodation groove to define the accommodation recess. Therefore, similarly to the groove processing tool according to the second aspect , it is possible to relatively easily and highly accurately form the accommodation recess.
【００４４】 さらに本発明の請求項７の溝加工工具に
よれば、工具本体に設けられた取付軸部の雄ねじ部に締
付部材を螺合することによって、保持部材が工具本体に
固定されるので、容易な組付作業でもって保持部材を工
具本体に確実に装着することができる。Further, according to the groove machining tool of claim 7 of the present invention, the holding member is fixed to the tool body by screwing the tightening member into the male screw portion of the mounting shaft portion provided in the tool body. Therefore, the holding member can be reliably attached to the tool body by an easy assembling work.
【図１】本発明に従う溝加工工具の一実施形態の要部を
示す側面図である。FIG. 1 is a side view showing a main part of an embodiment of a groove machining tool according to the present invention.
【図２】図１の溝加工工具を一部分解して示す分解断面
図である。FIG. 2 is an exploded cross-sectional view showing a part of the groove machining tool of FIG. 1 in an exploded manner.
【図３】図１の溝加工工具における保持部材の端部を示
す斜視図である。3 is a perspective view showing an end portion of a holding member in the groove processing tool of FIG. 1. FIG.
【図４】図１におけるＩＶ−ＩＶ線から見た所を示す断
面図である。FIG. 4 is a cross-sectional view showing a part viewed from a line IV-IV in FIG.
【図５】保持部材の他の変形形態を示す分解斜視図であ
る。FIG. 5 is an exploded perspective view showing another modification of the holding member.
【図６】保持部材の更に他の変形形態の端部を示す部分
斜視図である。FIG. 6 is a partial perspective view showing an end portion of still another modification of the holding member.
【図７】図６の保持部材に球状体を収容した状態を示す
端面図である。7 is an end view showing a state in which a spherical body is housed in the holding member of FIG.
【図８】溝加工工具を用いて溝加工を施したスリーブ部
材を切断して示す断面斜視図である。FIG. 8 is a cross-sectional perspective view showing a sleeve member that has been grooved using a groove processing tool.
【図９】従来の溝加工工具の一例を示す側面図である。FIG. 9 is a side view showing an example of a conventional groove processing tool.
【図１０】図９の溝加工工具の鋼球の固定様式を説明す
るための図である。FIG. 10 is a view for explaining a manner of fixing steel balls of the groove processing tool of FIG. 9.
２，２２ 工具本体 ６ 鋼球 ２４，５２，１０２ 保持部材 ２６ 取付軸部 ３２，１０６ 収容凹部 ３６，１１０ 取付孔 ３８，１１２ 球状体 ４２ ナット ４４，６２，１１４ 突出部 ４６ 受部 ５４ 第１部材 ５６ 第２部材 ５８ 収容溝 ２０２ スリーブ部材 2,22 Tool body 6 steel balls 24, 52, 102 holding member 26 Mounting shaft 32,106 accommodation recess 36,110 mounting holes 38,112 Spherical body 42 nuts 44,62,114 Projection 46 Receiver 54 First Member 56 Second member 58 storage groove 202 Sleeve member
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B21H 7/18 F16C 17/02 B24B 39/02 B21H 3/00 B31H 3/08 ─────────────────────────────────────────────────── ─── Continued Front Page (58) Fields surveyed (Int.Cl. 7 , DB name) B21H 7/18 F16C 17/02 B24B 39/02 B21H 3/00 B31H 3/08
Claims (7)
部材と、溝加工するための複数個の球状体とを具備し、
前記保持部材の一端面には、周方向に実質上等間隔を置
いて複数個の収容凹部が設けられており、該複数個の収
容凹部の各々は、その一部が前記保持部材の外周面に開
口しており、前記複数個の球状体の各々は、対応する収
容凹部に収容され、前記工具本体の端面と前記保持部材
の前記収容凹部によって固定され、前記保持部材の前記
開口を通してその一部が半径方向外方に突出しており、
前記工具本体および前記保持部材のいずれか一方には、
それらの他方に向けて突出する突出部が設けられ、また
それらの他方には、前記突出部を受入れる受部が設けら
れており、前記工具本体に前記保持部材を装着すると、
前記突出部が前記受部に挿入されることを特徴とする溝
加工工具。1. A tool main body, a holding member mounted on the tool main body, and a plurality of spherical bodies for grooving,
A plurality of accommodating recesses are provided at one end surface of the holding member at substantially equal intervals in the circumferential direction, and a part of each of the plurality of accommodating recesses is an outer peripheral surface of the holding member. Each of the plurality of spherical bodies is accommodated in a corresponding accommodating recess, is fixed by the end surface of the tool body and the accommodating recess of the holding member, and is inserted through the opening of the holding member. The part protrudes outward in the radial direction ,
Either one of the tool body and the holding member,
A protrusion is provided that protrudes toward the other of them, and
The other of them is provided with a receiving portion for receiving the protruding portion.
If the holding member is attached to the tool body,
A groove processing tool, wherein the protruding portion is inserted into the receiving portion .
数個の収容溝が形成された第１部材と、前記複数個の収
容溝と協働して前記複数個の収容凹部を規定する第２部
材とを備えており、前記複数個の収容溝の軸線方向の長
さは、前記複数個の球状体の外径よりも幾分小さく設定
されており、前記複数個の球状体の各々は、前記第１部
材の対応する収容溝に収容され、前記工具本体の端面と
前記第２部材の端面の間に固定されることを特徴とする
請求項１記載の溝加工工具。2. The holding member defines a plurality of accommodation recesses in cooperation with a first member having a plurality of accommodation grooves formed at intervals in the circumferential direction and the plurality of accommodation grooves. And a second member, which has a length in the axial direction of the plurality of accommodation grooves set to be slightly smaller than the outer diameter of the plurality of spherical bodies. The groove machining tool according to claim 1, wherein each is accommodated in a corresponding accommodation groove of the first member and is fixed between an end surface of the tool body and an end surface of the second member.
部材と、溝加工するための複数個の球状体とを具備し、
前記保持部材の一端面には、周方向に実質上等間隔を置
いて複数個の収容凹部が設けられており、該複数個の収
容凹部の各々は、その一部が前記保持部材の外周面に開
口しており、前記複数個の球状体の各々は、対応する収
容凹部に回転自在に収容され、前記保持部材の前記開口
を通してその一部が半径方向外方に突出しており、前記
工具本体および前記保持部材のいずれか一方には、それ
らの他方に向けて突出する突出部が設けられ、またそれ
らの他方には、前記突出部を受入れる受部が設けられて
おり、前記工具本体に前記保持部材を装着すると、前記
突出部が前記受部に挿入されることを特徴とする溝加工
工具。3. A tool main body, a holding member mounted on the tool main body, and a plurality of spherical bodies for grooving,
A plurality of accommodating recesses are provided at one end surface of the holding member at substantially equal intervals in the circumferential direction, and a part of each of the plurality of accommodating recesses is an outer peripheral surface of the holding member. Each of the plurality of spherical bodies is rotatably housed in a corresponding housing recess, and a part of the spherical body projects radially outward through the opening of the holding member ,
Either one of the tool body and the holding member
Is provided with a protrusion protruding toward the other of the
On the other side, a receiving portion for receiving the protruding portion is provided.
And when the holding member is attached to the tool body,
A groove processing tool, wherein a protruding portion is inserted into the receiving portion .
記収容凹部に回転自在に収容され、前記工具本体に前記
保持部材を装着すると、前記突出部の先端面が前記受部
の底面に当接する、または前記工具本体の端面と前記保
持部材の前記一端面とが当接することを特徴とする請求
項３記載の溝加工工具。4. Each of the plurality of spherical bodies is rotatably housed in the corresponding housing recess, and when the holding member is mounted on the tool body, the tip end surface of the protruding portion is the bottom surface of the receiving portion. The groove machining tool according to claim 3, wherein the groove body is in contact with the groove body, or the end surface of the tool body and the one end surface of the holding member are in contact with each other.
り、その周側面の一部が前記保持部材の外周面に細長く
開口しており、前記複数個の球状体の各々は、その一部
が対応する該開口から外方に突出していることを特徴と
する請求項３記載の溝加工工具。5. Each of the plurality of accommodating recesses has a cylindrical shape, a part of a peripheral side surface of the accommodating recess is elongated and opened to the outer peripheral surface of the holding member, and each of the plurality of spherical bodies has a cylindrical shape. The groove machining tool according to claim 3, wherein a part of the groove machining tool projects outward from the corresponding opening.
数個の円筒状の収容溝が形成された第１部材と、前記複
数個の収容溝と協働して前記複数個の収容凹部を規定す
る第２部材とを備えていることを特徴とする請求項５記
載の溝加工工具。6. The holding member comprises a first member having a plurality of cylindrical accommodation grooves formed at intervals in the circumferential direction, and the plurality of accommodation grooves in cooperation with the plurality of accommodation grooves. The groove machining tool according to claim 5, further comprising a second member that defines a recess.
部が設けられ、この取付軸部には雄ねじ部が設けられて
おり、一方前記保持部材にはこれを貫通して取付孔が形
成されており、前記取付軸部は前記取付孔を通して装着
され、前記保持部材から突出する前記雄ねじ部に締付部
材を螺合することによって、前記保持部材が前記工具本
体に固定されることを特徴とする請求項１または３記載
の溝加工工具。7. The tool body is provided with a mounting shaft portion extending in the axial direction, and the mounting shaft portion is provided with a male screw portion, while the holding member is formed with a mounting hole penetrating therethrough. The mounting shaft portion is mounted through the mounting hole, and the holding member is fixed to the tool body by screwing a tightening member into the male screw portion protruding from the holding member. The groove processing tool according to claim 1 or 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1065697A JP3483185B2 (en) | 1997-01-23 | 1997-01-23 | Grooving tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1065697A JP3483185B2 (en) | 1997-01-23 | 1997-01-23 | Grooving tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10202517A JPH10202517A (en) | 1998-08-04 |
| JP3483185B2 true JP3483185B2 (en) | 2004-01-06 |
Family
ID=11756279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1065697A Expired - Fee Related JP3483185B2 (en) | 1997-01-23 | 1997-01-23 | Grooving tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3483185B2 (en) |
-
1997
- 1997-01-23 JP JP1065697A patent/JP3483185B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10202517A (en) | 1998-08-04 |
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