JP2976364B2 - Processing fluid supply device to rotating body - Google Patents
Processing fluid supply device to rotating bodyInfo
- Publication number
- JP2976364B2 JP2976364B2 JP7842895A JP7842895A JP2976364B2 JP 2976364 B2 JP2976364 B2 JP 2976364B2 JP 7842895 A JP7842895 A JP 7842895A JP 7842895 A JP7842895 A JP 7842895A JP 2976364 B2 JP2976364 B2 JP 2976364B2
- Authority
- JP
- Japan
- Prior art keywords
- fluid
- working fluid
- moving shaft
- pressure
- shaft
- 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 - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/10—Arrangements for cooling or lubricating tools or work
- B23Q11/1015—Arrangements for cooling or lubricating tools or work by supplying a cutting liquid through the spindle
- B23Q11/103—Rotary joints specially adapted for feeding the cutting liquid to the spindle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
- F16L27/0804—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another
- F16L27/0808—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation
- F16L27/0812—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation with slide bearings
- F16L27/082—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation with slide bearings having axial sealing
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- Joints Allowing Movement (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、工作機械のスルースピ
ンドルクーラント供給用ロータリジョイントや、細穴放
電加工機の回転パイプ電極への加工液供給用ロータリジ
ョイントなど、固定管路と回転管路との間で流体を移送
する場合に用いるロータリジョイントを有した回転体へ
の加工液供給装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary joint for supplying a through-spindle coolant for a machine tool and a rotary joint for supplying a machining fluid to a rotating pipe electrode of a small-hole electric discharge machine. The present invention relates to an apparatus for supplying a machining fluid to a rotating body having a rotary joint used for transferring a fluid between the fluids.
【０００２】[0002]
【従来の技術】工作機械の主軸装置内部に加工液や加圧
空気を流通して、主軸先端に装着した工具へ、その加工
液や加圧空気を供給するスルースピンドルクーラント装
置が知られている。このスルースピンドルクーラント装
置などに用いられる固定管路から回転管路へ流体を移送
する公知のロータリジョイントにおいては、回転軸及び
移動軸端面にそれぞれ取付けた一対のシール部材の材質
は、耐摩耗性のある超硬合金、セラミックスなどからな
り、その滑動面はラップ加工などにより極めて平滑に仕
上げされている。2. Description of the Related Art There is known a through-spindle coolant apparatus which circulates a machining fluid or pressurized air inside a spindle device of a machine tool and supplies the machining fluid or pressurized air to a tool mounted on a tip of the spindle. . In a known rotary joint for transferring a fluid from a fixed pipe to a rotary pipe used in a through spindle coolant device or the like, the material of a pair of seal members attached to the end faces of the rotating shaft and the moving shaft is made of a material having wear resistance. It is made of a cemented carbide, ceramic or the like, and its sliding surface is extremely smoothed by lapping or the like.
【０００３】しかし、従来のものでは、加工液自体の圧
力でシール部材を接触させながら加工液を流すようにし
ているため、加工液を止めた場合、シール部材間が離間
し、その間より加工液洩れが生じ、漏れを逃す配管が設
けてあっても、主軸頭のベアリングに加工液が入り込む
恐れがある。また、使用する加工液圧力はシール部材が
互いに接触し得る所定圧力以上のものとしなければなら
ない。However, in the prior art, the working fluid is caused to flow while the sealing member is brought into contact with the pressure of the working fluid itself. Therefore, when the working fluid is stopped, the seal members are separated from each other, and the working fluid is further removed from the gap. Leakage may occur, and even if piping for releasing the leakage is provided, there is a risk that the machining fluid may enter the bearing at the head of the spindle. Further, the working fluid pressure to be used must be equal to or higher than a predetermined pressure at which the seal members can come into contact with each other.
【０００４】また、特開平６−２４１３６５号公報に示
されるように、シール部材の一方をダイヤフラムにより
離間する方向に付勢しておき、空気圧により加工液流通
前にシール部材同士を接合させるよう構成したものがあ
るが、加工液の主軸内およびロータリジョイント付近に
残留する加工液の積極的排除は、ダイヤフラムに対して
負圧を与えることになるので行い難い。Further, as disclosed in Japanese Patent Application Laid-Open No. 6-241365, one of the seal members is urged by a diaphragm in a direction in which the seal members are separated from each other, and the seal members are joined to each other before the working fluid flows by air pressure. However, it is difficult to positively remove the machining fluid remaining in the main shaft and near the rotary joint because a negative pressure is applied to the diaphragm.
【０００５】さらに、本出願人の出願である特願平６−
２５３５０５号「加工液供給装置」にみられるように、
主軸管路中に残留する加工液を吸引することにより、加
工液停止後の加工液噴出部からの残留加工液の漏洩を防
止しようとするため、加工液圧力を利用したエゼクタを
用いることも提案されている。しかし、この出願ではそ
のまま公知のロータリジョイントに利用することは困難
である。[0005] Further, Japanese Patent Application No. Hei 6 (1994) -86, filed by the present applicant.
As seen in No. 253505 “Working fluid supply device”,
It is also proposed to use an ejector that uses the pressure of the machining fluid to prevent leakage of the remaining machining fluid from the machining fluid spout after the machining fluid is stopped by sucking the machining fluid remaining in the spindle line. Have been. However, in this application, it is difficult to use it as it is for a known rotary joint.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、加工液の圧
力の大小に左右されず、また、圧力変動があっても、更
に圧力が負圧になってもシール部材の接触が維持され、
シール部材間からの加工液の洩れを防止できることを可
能にした回転体への加工液供給装置を提供しようとする
ものである。According to the present invention, the contact of the seal member is maintained regardless of the pressure of the working fluid, even if the pressure fluctuates or the pressure becomes negative.
An object of the present invention is to provide a device for supplying a working fluid to a rotating body, which makes it possible to prevent leakage of the working fluid from between seal members.
【０００７】[0007]
【課題を解決するための手段】本発明は、一対のシール
部材を接触状態にするための圧力流体（作動流体）の回
路を加工液供給回路とは別に設けるようにしたものであ
って、その構成は下記のようになっている。即ち、 （１） ハウジングと、前記ハウジングの内部に設けら
れ、軸心部に加工液通路を有する回転軸と、前記ハウジ
ングの内部に前記回転軸に対向配置され、かつ軸線方向
に移動可能に嵌着され、軸心部に加工液通路を有する移
動軸と、前記回転軸と前記移動軸との対向面に設けられ
た一対のシール部材と、前記ハウジングと前記移動軸と
の間に設けられ、前記一対のシール部材が非接触状態と
なるように前記移動軸を付勢する付勢手段と、前記移動
軸の加工液通路に加工液を供給する加工液供給手段と、
前記加工液通路とは独立した通路に圧力流体を導入し、
前記付勢手段の付勢力に打ち勝って前記シール部材を接
触状態にさせる圧力応動手段と、前記圧力応動手段に圧
力流体を供給する圧力流体供給手段と、前記加工液供給
手段および圧力流体供給手段を制御する制御手段と、を
具備する回転体への加工液供給装置。 （２） 前記加工液供給手段は、前記移動軸への加工液
供給管路の途中から分岐して設けられ、前記移動軸への
加工液の供給を停止したとき前記加工液供給管路からの
加工液をドレンタンク側への回収管路に噴射し負圧を発
生させ前記回転軸及び移動軸の加工液通路に残留する加
工液を吸引して前記ドレンタンクに回収する吸引手段を
有し、前記制御手段は、前記移動軸への加工液の供給中
および前記吸引手段による前記残留する加工液の吸引中
は、前記シール部材を接触状態にさせるように前記圧力
流体供給手段を制御する構成とした前記（１）に記載の
回転体への加工液供給装置。According to the present invention, a pressure fluid (working fluid) circuit for bringing a pair of seal members into contact with each other is provided separately from a working fluid supply circuit. The configuration is as follows. That is, (1) a housing, a rotating shaft provided inside the housing and having a machining fluid passage in an axial center portion, and fitted inside the housing so as to face the rotating shaft and to be movable in the axial direction. Attached, a moving shaft having a machining liquid passage in an axial center thereof, a pair of seal members provided on a surface facing the rotating shaft and the moving shaft, and provided between the housing and the moving shaft, biasing means for the pair of sealing members urges the movable shaft such that the non-contact state, the machining liquid supply means for supplying a working fluid to the working fluid path prior Symbol movement axis,
A pressure fluid is introduced into a passage independent of the machining fluid passage,
A pressure-responsive means for said seal member by overcoming the biasing force of the biasing means into contact with a pressure fluid supply means for supplying pressure fluid to said pressure responsive means, said working fluid supplying means and the pressure fluid supply means And a control means for controlling the processing fluid. (2) the working fluid supplying means is provided to branch from the middle of the machining liquid supply line to the mobile shaft, when stopping the feed of working fluid into the moving shaft from the working fluid supply conduit A suction means for injecting a working fluid into a collecting pipe to the drain tank side to generate a negative pressure, sucking working fluid remaining in the working fluid passage of the rotating shaft and the moving shaft and collecting the working fluid in the drain tank ;
Yes, and the control means, during the suction of the working fluid to said residual by working-fluid supply and in the suction means to the previous SL moving shaft, said pressure fluid supply means so as to pre-Symbol seal member in contact machining liquid supply device to the rotating body according to the which is to control the configuration (1).
【０００８】[0008]
【作用】本発明によれば、回転体と移動軸とからなるロ
ータリジョイントに加工液が流れる間は、作動流体によ
る付勢力を常時作用させて、シール部材が非接触になる
よう付勢する付勢手段の付勢力に打ち勝ってシール部材
を接触状態に維持させることができる。また、加工を停
止するに際し、加工液の流出を停止する場合も作動流体
による付勢力を作用させてシール部材を接触状態にし続
け、主軸内およびロータリジョイント部分に残留する加
工液に負圧を作用させてドレンタンク側に吸引する。こ
うして、主軸、移動軸、およびシール部材より加工液を
排出させることができ、軸受部分などに加工液が侵入す
るような事態を回避できる。シール部材間を加工液が流
通しなくなったら初めて、作動流体による付勢力を止
め、シール部材を非接触状態にする。According to the present invention, while the machining fluid flows through the rotary joint composed of the rotating body and the moving shaft, the urging force of the working fluid is always applied to urge the seal member so as to be out of contact. The sealing member can be maintained in the contact state by overcoming the urging force of the urging means. Also, when the machining is stopped, when the outflow of the machining fluid is stopped, the urging force of the working fluid is applied to keep the seal member in a contact state, and a negative pressure is applied to the machining fluid remaining in the main spindle and the rotary joint. Then, suction is made to the drain tank side. In this way, the working fluid can be discharged from the main shaft, the moving shaft, and the seal member, and a situation where the working fluid intrudes into a bearing portion or the like can be avoided. Only when the working fluid stops flowing between the seal members, the urging force of the working fluid is stopped to bring the seal members into a non-contact state.
【０００９】[0009]
【実施例】以下に、図面に沿って本発明の好ましい実施
例について説明するが、本発明は、以下に説明の実施例
のみに限られるものではないことは、上述説明に徴して
明らかである。また、以下に述べる本実施例の構成部材
の一部は、本件出願当時の当業界公知の技術レベルの範
囲内で、当業者が任意に設計変更を施すことが可能なも
のも含まれることに鑑みれば、格別の理由を示すことな
く本実施例の構成のみに基づいて、本発明の要旨を限定
して解すべきではない。DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. However, it is apparent from the above description that the present invention is not limited to only the embodiments described below. . In addition, some of the components of the present embodiment described below include those that can be arbitrarily modified by those skilled in the art within the range of technical levels known in the art at the time of filing the present application. In view of the above, the gist of the present invention should not be limited and understood based only on the configuration of the present embodiment without showing any particular reason.
【００１０】図１は、本発明の回転体への加工液供給装
置の実施例の構成を示す断面図、図２は、図１のII−II
断面図である。ロータリジョイント１が、工作機械の主
軸装置３の後端部に取り付けられている。主軸装置３
は、主軸頭５に軸受７によって主軸９を回転自在に支持
する構成になっている。FIG. 1 is a sectional view showing the construction of an embodiment of the apparatus for supplying a working fluid to a rotating body according to the present invention, and FIG. 2 is a sectional view taken along the line II-II of FIG.
It is sectional drawing. A rotary joint 1 is attached to a rear end of a spindle device 3 of a machine tool. Spindle device 3
Has a configuration in which a spindle 9 is rotatably supported on a spindle head 5 by a bearing 7.
【００１１】一方、ロータリジョイント１の第１ハウジ
ング11は、主軸頭５と同軸に主軸頭５端面に固定されて
いる。ロータリジョイント１の回転軸13は、主軸９と同
軸に主軸９端面にねじ結合によって固定され、第１ハウ
ジング11内に形成した空間部に収容されている。On the other hand, the first housing 11 of the rotary joint 1 is fixed to the end face of the spindle head 5 coaxially with the spindle head 5. The rotation shaft 13 of the rotary joint 1 is fixed to the end face of the main shaft 9 by screw connection coaxially with the main shaft 9, and is housed in a space formed in the first housing 11.
【００１２】回転軸13の主軸９と反対側の端面には、シ
ール部材15が固着されている。シール部材15と対面した
シール部材17が移動軸19の一端面に固着され、移動軸19
は、第１ハウジング11先端に位置する円筒孔21内に軸線
方向に移動可能に嵌合されている。A seal member 15 is fixed to an end face of the rotary shaft 13 opposite to the main shaft 9. A seal member 17 facing the seal member 15 is fixed to one end surface of the moving shaft 19,
Is fitted movably in the axial direction into a cylindrical hole 21 located at the tip of the first housing 11.
【００１３】第１ハウジング11先端には第２ハウジング
12が同心的に固定され、その後方側に前記移動軸19が環
状突出円筒孔41により前記円筒孔21と同様嵌合支承され
ている。さらに、ダイヤフラム31がその外周を第１ハウ
ジング11と第２ハウジング12とに挾まれて固定され、そ
の内周を移動軸19に固定され、このダイヤフラム31の弾
性力によって常時移動軸19を主軸９と反対方向に付勢
し、一対のシール部材15、17を非接触状態にしている。
移動軸19のシール部材17側は、図２に示すように、フラ
ンジ形状をしており、該フランジ形状部に形成した切欠
22とピン23とが係合することによって回り止めされてい
る。A second housing is provided at the end of the first housing 11.
The moving shaft 19 is fitted concentrically behind the cylindrical shaft 21 by an annular projecting cylindrical hole 41. Further, a diaphragm 31 is fixed with its outer periphery sandwiched between the first housing 11 and the second housing 12, and its inner periphery is fixed to the moving shaft 19. And the pair of seal members 15, 17 are in a non-contact state.
As shown in FIG. 2, the seal member 17 side of the moving shaft 19 has a flange shape, and a notch formed in the flange shape portion.
The rotation is prevented by the engagement between the pin 22 and the pin 23.
【００１４】さらに、第１ハウジング11内の空間には、
ハウジングの環状突出部27が形成され間隙をあけてカラ
ー25がスナップリングで取着されている。カーボンリン
グ29が回転軸13に嵌着されるとともに、カラー25と環状
突出部27との間に挾まれて装着され、第１ハウジング11
と回転軸13との間のシール手段を構成している。Further, in the space inside the first housing 11,
An annular projection 27 of the housing is formed and a collar 25 is attached by a snap ring with a gap. A carbon ring 29 is fitted on the rotating shaft 13 and is mounted between the collar 25 and the annular projection 27 so as to be fitted in the first housing 11.
And the rotating shaft 13 constitute a sealing means.
【００１５】第１ハウジング11内には、一対のシール部
材15、17を収容する空間59が形成され、この空間59は、
連通路33によって第１ハウジング11とダイヤフラム31と
移動軸19外周とによって囲まれた空間35と連通してい
る。空間59、連通路33、および空間35によって第１空間
が構成され、この第１空間にはポート43がドレンタンク
47に配管を介して開口している。In the first housing 11, a space 59 for accommodating the pair of seal members 15, 17 is formed.
The communication passage 33 communicates with a space 35 surrounded by the first housing 11, the diaphragm 31, and the outer periphery of the moving shaft 19. A first space is constituted by the space 59, the communication passage 33, and the space 35, and the port 43 is provided in the first space with a drain tank.
47 is open via piping.
【００１６】一方、第２ハウジング12の内部には、ダイ
ヤフラム31に圧力を作用させる流体を受容する第２空間
37が形成され、これに連結するポート39が第２ハウジン
グ12の側壁部分に開口している。この第２空間がシリン
ダを構成し、すなわち特許請求の範囲の圧力応動手段で
ある。ポート39には電磁開閉弁55を介して作動流体が導
入される。なお、この第２空間37を密閉状態に保つため
に、円筒孔41には移動軸19との間を封止するためのシー
ル材が設けられている。On the other hand, inside the second housing 12, a second space for receiving a fluid for applying pressure to the diaphragm 31 is provided.
37 is formed, and a port 39 connected thereto opens to the side wall portion of the second housing 12. This second space constitutes a cylinder, that is, a pressure responsive means according to the claims. A working fluid is introduced into the port 39 via an electromagnetic on-off valve 55. In order to keep the second space 37 in a closed state, the cylindrical hole 41 is provided with a sealing material for sealing the space between the cylindrical shaft 41 and the moving shaft 19.
【００１７】加工液供給源からの加工液は、電磁開閉弁
51を経て加工液導管の役目をする中空軸となっている移
動軸19の外端に接続供給され、また、その途中で分岐さ
れ、電磁開閉弁48を経てエジェクタ45の被吸引側45a に
接続配管されている。さらに、前記エジェクタ45のノズ
ル側45b には前記電磁開閉弁51により切換えられて送給
される加圧状態の加工液が送り込まれる。なお、電磁開
閉弁55、51、48の開閉のタイミングは制御手段60で制御
される。参考までに、図３にエジェクタ45の概略構成断
面図を示す。The working fluid from the working fluid supply source is supplied to an electromagnetic on-off valve.
It is connected and supplied to the outer end of the moving shaft 19, which is a hollow shaft serving as a machining liquid conduit, via 51, and is branched on the way, and connected to the suction side 45a of the ejector 45 via an electromagnetic on-off valve 48. It is plumbed. Further, a pressurized working fluid that is switched and fed by the electromagnetic on-off valve 51 is fed into the nozzle side 45b of the ejector 45. The timing of opening and closing the electromagnetic on-off valves 55, 51, 48 is controlled by the control means 60. For reference, FIG. 3 shows a schematic configuration sectional view of the ejector 45.
【００１８】移動軸19、シール部材15、17、回転軸13、
主軸９には、同軸の加工液通路57が形成されており、加
工液を主軸９先端に装着した工具（図示せず）へ送るよ
うになっている。The moving shaft 19, the sealing members 15, 17, the rotating shaft 13,
A coaxial machining fluid passage 57 is formed in the spindle 9 so that machining fluid is sent to a tool (not shown) attached to the tip of the spindle 9.
【００１９】次に、実施例の作用について説明する。ダ
イヤフラム31の作動流体供給側の第２空間37に作動流体
を作用させないで主軸９を回転させる場合は、ダイヤフ
ラム31の弾性付勢力により、一対のシール部材15，17は
非接触状態となっている。そうすれば、主軸９が回転し
てもシール部材15、17の滑動はなく、よって摩耗もしな
い。図１はこのような状態を示している。Next, the operation of the embodiment will be described. When rotating the main shaft 9 without applying the working fluid to the second space 37 on the working fluid supply side of the diaphragm 31, the pair of seal members 15, 17 are in a non-contact state due to the elastic urging force of the diaphragm 31. . Then, even if the main shaft 9 rotates, the seal members 15 and 17 do not slide and thus do not wear. FIG. 1 shows such a state.
【００２０】次に、加工液を流体通路57へ流通させる場
合は、電磁開閉弁55を開にし、電磁開閉弁51の主軸側を
開にし、電磁開閉弁48を閉にして、作動流体をポート39
より第２空間37に導入し、同時に加工液を移動軸19の端
部より加工液通路57に導入する。作動流体は第２空間37
においてダイヤフラム31に圧力を作用させ、その弾性力
に抗してダイヤフラム31を移動軸19とともに移動させ、
一対のシール部材15、17を接触させ、加工液は流体通路
57を経て主軸９先端方向へ供給される。なお、この状態
ではエジェクタ45の被吸引側45a に対しては、電磁開閉
弁48が閉じているので加工液は流通しない。Next, when the working fluid is allowed to flow through the fluid passage 57, the electromagnetic on-off valve 55 is opened, the main shaft side of the electromagnetic on-off valve 51 is opened, the electromagnetic on-off valve 48 is closed, and the working fluid is supplied to the port. 39
The working fluid is further introduced into the second space 37, and at the same time, the working fluid is introduced into the working fluid passage 57 from the end of the moving shaft 19. The working fluid is the second space 37
At a pressure is applied to the diaphragm 31, the diaphragm 31 is moved together with the moving shaft 19 against its elastic force,
The pair of seal members 15 and 17 are brought into contact with each other, and
It is supplied to the end of the main shaft 9 via 57. In this state, the machining liquid does not flow to the suction side 45a of the ejector 45 because the electromagnetic on-off valve 48 is closed.
【００２１】このとき、一対のシール部材15、17間から
の加工液の漏洩は殆どなく、若干の漏洩加工液は、空間
59、連通路33、および空間35よりなる第１空間よりポー
ト43からドレンタンク47へ回収される。一対のシール部
材15、17の滑動接触面間に、しみ出した加工液の潤滑作
用により、シール部材の滑動面の摩耗は最小限に抑えら
れる。At this time, there is almost no leakage of the working fluid from between the pair of seal members 15 and 17, and some of the leaked working fluid is
From the first space consisting of 59, the communication passage 33 and the space 35, it is recovered from the port 43 to the drain tank 47. Abrasion of the sliding surfaces of the seal members is minimized by the lubricating action of the exuded working fluid between the sliding contact surfaces of the pair of seal members 15, 17.
【００２２】加工液供給の必要がなくなつて、加工液の
供給を停止する場合、作動流体は供給し続け、一対のシ
ール部材15、17を接触状態のままにしておく。それと同
時に、移動軸19に対する加工液供給経路にある電磁開閉
弁51を切換作動させ、移動軸19及び主軸９の流体通路57
に対する供給経路を切換てエジェクタ45のノズル側45b
に切換接続するとともに、電磁開閉弁48を開いて、移動
軸19に接続された管路をエジェクタ45の被吸引側45a に
接続する。When the supply of the working fluid is stopped before the supply of the working fluid is required, the supply of the working fluid is continued, and the pair of seal members 15 and 17 are kept in contact. At the same time, the electromagnetic on-off valve 51 in the machining fluid supply path for the moving shaft 19 is switched to operate, and the fluid passage 57 of the moving shaft 19 and the main shaft 9 is switched.
The supply path to the nozzle 45b of the ejector 45
And the electromagnetic open / close valve 48 is opened to connect the pipeline connected to the moving shaft 19 to the suction side 45a of the ejector 45.
【００２３】すると、加圧状態にある加工液は電磁開閉
弁51で経路を切換られてエジェクタ45のノズル側45b に
接続され、移動軸19の加工液通路57は電磁開閉弁48を経
てエジェクタ45の被吸引側45a に接続されることになる
ので、加工液通路57及びそこに至る管路中の残留加工液
は、エジェクタ45の作用により排出側45c より吸引排出
され、ドレンタンク47に排出される。Then, the path of the pressurized machining fluid is switched by the electromagnetic on-off valve 51 and connected to the nozzle side 45b of the ejector 45, and the machining fluid passage 57 of the moving shaft 19 passes through the electromagnetic on-off valve 48 to the ejector 45. The processing fluid remaining in the processing fluid passage 57 and the pipeline leading to it is sucked and discharged from the discharge side 45c by the action of the ejector 45, and discharged to the drain tank 47. You.
【００２４】その後加工液の供給を停止するとともに、
電磁開閉弁55を閉じて作動流体の第２空間37への供給も
停止する。するとダイヤフラム31の弾性力により一対の
シール部材15、17は非接触状態に復帰する。このように
制御手段60は、加工液通路57内が正圧、負圧にかかわら
ず加工液が流通している間は常に作動流体を第２空間へ
供給し続け、一対のシール部材15、17を接触状態に保
ち、加工液の漏洩を防止している。Thereafter, the supply of the working fluid is stopped, and
The supply of the working fluid to the second space 37 is also stopped by closing the electromagnetic on-off valve 55. Then, the pair of seal members 15, 17 return to the non-contact state by the elastic force of the diaphragm 31. As described above, the control means 60 continuously supplies the working fluid to the second space while the working fluid is flowing regardless of whether the inside of the working fluid passage 57 is a positive pressure or a negative pressure. Are kept in contact with each other to prevent leakage of the working fluid.
【００２５】本実施例においては、ダイヤフラム31を用
いて移動軸19を変位させるようにしているが、ダイヤフ
ラムに代えて移動軸19をシリンダ・ピストン機構を用い
て変位させるようにしてもよい。また、吸引作用をする
適宜機構をエジェクタ45に代えて用いてもよい。作動流
体は空気、加工液またはその他の作動油等、何を用いて
もよい。In this embodiment, the moving shaft 19 is displaced by using the diaphragm 31, but the moving shaft 19 may be displaced by using a cylinder / piston mechanism instead of the diaphragm. Further, an appropriate mechanism for performing a suction action may be used in place of the ejector 45. The working fluid may be anything, such as air, working fluid or other working oil.
【００２６】更に、本実施例において、一端がシール部
材17の接触面に開口し、シール部材17および移動軸19に
穿設され、もう一端が第２空間37に開口した細い管路を
設け、その管路内を第２空間37に供給された作動流体が
シール部材15、17の接触面に向けて送られて接触面の潤
滑を行うようにしてもよい。主軸９の回転数が非常に高
速の場合は、このような構成が必要となり、このときの
作動流体としては加工液とは別の潤滑油が好ましい。Further, in the present embodiment, a thin pipe having one end opened to the contact surface of the seal member 17 and formed in the seal member 17 and the moving shaft 19 and the other end opened to the second space 37 is provided. The working fluid supplied to the second space 37 in the pipeline may be sent toward the contact surfaces of the seal members 15 and 17 to lubricate the contact surfaces. When the rotational speed of the main shaft 9 is very high, such a configuration is necessary. As a working fluid at this time, a lubricating oil different from the working fluid is preferable.
【００２７】[0027]
【発明の効果】本発明による装置は、加工液の圧力でシ
ール部材を接触状態に維持させるのではなく、別回路の
作動流体の圧力でシール部材を接触状態にしているの
で、加工液の圧力変動、圧力低下、又は加工液回路が負
圧になったとしても、シール部材の接触状態は維持さ
れ、シール部材間からの加工液の洩れは生じない。よっ
て洩れた加工液が主軸ベアリングに侵入する障害がなく
なる。The apparatus according to the present invention does not maintain the sealing member in contact with the pressure of the working fluid, but makes the sealing member in contact with the pressure of the working fluid in another circuit. Even if the fluctuation, the pressure drop, or the working fluid circuit becomes a negative pressure, the contact state of the seal member is maintained, and the working fluid does not leak from between the seal members. Therefore, there is no obstacle that the leaked machining fluid enters the main shaft bearing.
【図１】本発明の回転体への加工液供給装置の実施例の
断面図である。FIG. 1 is a sectional view of an embodiment of a device for supplying a working fluid to a rotating body according to the present invention.
【図２】図１のII−II線に沿う断面図である。FIG. 2 is a cross-sectional view taken along the line II-II of FIG.
【図３】エジェクタの構成を示す概略構成断面図であ
る。FIG. 3 is a schematic cross-sectional view illustrating a configuration of an ejector.
１ ロータリジョイント ３ 主軸装置 ５ 主軸頭 ７ 軸受 ９ 主軸 11 第１ハウジング 12 第２ハウジング 13 回転軸 15、17 シール部材 19 移動軸 29 カーボンリング 31 ダイヤフラム 33 連通路 35 空間 37 第２空間 48、51、55 電磁開閉弁 57 加工液通路 60 制御手段。 DESCRIPTION OF SYMBOLS 1 Rotary joint 3 Spindle device 5 Spindle head 7 Bearing 9 Spindle 11 1st housing 12 2nd housing 13 Rotating shaft 15, 17 Seal member 19 Moving shaft 29 Carbon ring 31 Diaphragm 33 Communication passage 35 Space 37 Second space 48, 51, 55 Solenoid on-off valve 57 Processing fluid passage 60 Control means.
フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) B23Q 11/10 F16L 27/08 Continued on the front page (58) Fields surveyed (Int.Cl. 6 , DB name) B23Q 11/10 F16L 27/08
Claims (2)
を有する回転軸と、 前記ハウジングの内部に前記回転軸に対向配置され、か
つ軸線方向に移動可能に嵌着され、軸心部に加工液通路
を有する移動軸と、 前記回転軸と前記移動軸との対向面に設けられた一対の
シール部材と、 前記ハウジングと前記移動軸との間に設けられ、前記一
対のシール部材が非接触状態となるように前記移動軸を
付勢する付勢手段と、前 記移動軸の加工液通路に加工液を供給する加工液供給
手段と、 前記加工液通路とは独立した通路に圧力流体を導入し、
前記付勢手段の付勢力に打ち勝って前記シール部材を接
触状態にさせる圧力応動手段と、 前記圧力応動手段に圧力流体を供給する圧力流体供給手
段と、 前記加工液供給手段および圧力流体供給手段を制御する
制御手段と、 を具備することを特徴とした回転体への加工液供給装
置。1. A housing, and a machining fluid passage provided in the housing and having a shaft center portion.
A rotating shaft having: a housing disposed inside the housing so as to face the rotating shaft;
Axially movable so that the machining fluid passage
And a pair of moving shafts provided on surfaces facing the rotating shaft and the moving shaft.
A sealing member, provided between the housing and the moving shaft,
Move the moving shaft so that the pair of seal members are in a non-contact state.
Biasing means for biasing;Previous Machining fluid supply for supplying machining fluid to the machining fluid passage of the moving shaft
Means, A pressure fluid is introduced into a passage independent of the machining fluid passage,
Overcoming the biasing force of the biasing means, the sealing member is brought into contact.
Pressure responsive means to make it touch, A pressure fluid supply means for supplying a pressure fluid to the pressure responsive means.
Controlling a machining fluid supply means and a pressure fluid supply means
Control means for supplying a machining fluid to the rotating body, characterized by comprising:
Place.
加工液供給管路の途中から分岐して設けられ、前記移動
軸への加工液の供給を停止したとき前記加工液供給管路
からの加工液をドレンタンク側への回収管路に噴射し負
圧を発生させ前記回転軸及び移動軸の加工液通路に残留
する加工液を吸引して前記ドレンタンクに回収する吸引
手段を有し、 前記制御手段は、前記移動軸への加工液の供給中および
前記吸引手段による前記残留する加工液の吸引中は、前
記シール部材を接触状態にさせるように前記圧力流体供
給手段を制御する構成とした請求項１に記載の回転体へ
の加工液供給装置。Wherein said working fluid supplying means is provided to branch from the middle of the working fluid supply conduit to the moving shaft, the working fluid supply conduit when stopping the feed of working fluid into the moving shaft The processing fluid from <br/> is injected into the recovery pipe line to the drain tank side to generate a negative pressure, and the processing fluid remaining in the processing fluid passage of the rotating shaft and the moving shaft is sucked and collected in the drain tank. have a suction means, said control means, during aspiration of the working fluid to said residual by working-fluid supply and in the suction means to the previous SL moving shaft causes the front <br/> Symbol seal member in contact 2. The apparatus for supplying a working fluid to a rotating body according to claim 1, wherein said apparatus is configured to control said pressure fluid supply means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7842895A JP2976364B2 (en) | 1995-03-10 | 1995-03-10 | Processing fluid supply device to rotating body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7842895A JP2976364B2 (en) | 1995-03-10 | 1995-03-10 | Processing fluid supply device to rotating body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08243877A JPH08243877A (en) | 1996-09-24 |
| JP2976364B2 true JP2976364B2 (en) | 1999-11-10 |
Family
ID=13661779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7842895A Expired - Lifetime JP2976364B2 (en) | 1995-03-10 | 1995-03-10 | Processing fluid supply device to rotating body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2976364B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001198772A (en) * | 2000-01-19 | 2001-07-24 | Kira Corporation:Kk | Machining device having function for removing cutting fluid remaining in cutting fluid passage |
| JP3809610B2 (en) * | 2002-11-25 | 2006-08-16 | ホーコス株式会社 | Multi-axis spindle head for machine tools |
| JP2009039788A (en) * | 2007-08-06 | 2009-02-26 | Taco Co Ltd | Oil mist supply system |
| JP2010179408A (en) * | 2009-02-05 | 2010-08-19 | Olympus Corp | Machining device |
| US8453675B2 (en) * | 2009-12-01 | 2013-06-04 | Deublin Company | Rotary union with selectively controlled seal |
| DE102013009759A1 (en) * | 2013-06-11 | 2014-12-11 | Christian Maier Gmbh & Co. Kg Maschinenfabrik | Device for transporting media |
-
1995
- 1995-03-10 JP JP7842895A patent/JP2976364B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08243877A (en) | 1996-09-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9851036B2 (en) | Fluid transfer coupling | |
| JP3316680B1 (en) | Spindle device of machine tool | |
| CN102080749B (en) | Swivel joint and system thereof and operating method | |
| JPH0361786A (en) | Rotary union joint | |
| JP4542114B2 (en) | Rotary seal mechanism and rotary joint in fluid feed mechanism | |
| JP2976364B2 (en) | Processing fluid supply device to rotating body | |
| JP4629636B2 (en) | Rotary seal mechanism and rotary joint in fluid feed mechanism | |
| KR950002529Y1 (en) | Fluid coupling device | |
| TW201821212A (en) | Coolant joint device | |
| JP2871082B2 (en) | Fluid supply fitting | |
| JP3675535B2 (en) | Rotary joint and fluid supply device to rotating body | |
| JP4028868B2 (en) | Rotational feedthrough | |
| JP2906007B2 (en) | Rotary joint | |
| JP2799657B2 (en) | Rotary joint | |
| JP3801677B2 (en) | Rotary joint | |
| JPH0743062B2 (en) | Rotary joint | |
| JPH10138088A (en) | Liquid rotating-distributing device in rotary shaft | |
| JP4228411B2 (en) | Rotary joint | |
| JP3801676B2 (en) | Rotary joint | |
| JP2906008B2 (en) | Rotary joint | |
| KR102295065B1 (en) | Apparatus for preventing of oil leakage and recovery of rotating shaft | |
| JP2000052115A (en) | Work supporting device | |
| JP2001219302A (en) | Air feed structure for work holding and operation in rotating spindle | |
| KR101023685B1 (en) | Cutting oil supplying system for main spindle | |
| JP2978693B2 (en) | Bush device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080910 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080910 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090910 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090910 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100910 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110910 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110910 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120910 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120910 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130910 Year of fee payment: 14 |
|
| EXPY | Cancellation because of completion of term |