JP4204514B2

JP4204514B2 - Processing equipment

Info

Publication number: JP4204514B2
Application number: JP2004148708A
Authority: JP
Inventors: 陽一関; 宣光荒木; 達生佐藤
Original assignee: Nissin Kogyo Co Ltd
Current assignee: Nissin Kogyo Co Ltd
Priority date: 2004-05-19
Filing date: 2004-05-19
Publication date: 2009-01-07
Anticipated expiration: 2024-05-19
Also published as: JP2005329485A

Description

本発明は切削加工等の機械加工に使用する加工装置に関する。 The present invention relates to a processing apparatus used for machining such as cutting.

切削加工等の機械加工を施す工作機械では、ドリル等の工具の刃先の潤滑性を確保し、刃先を冷却するために切削油を供給しながら加工する。セミドライ加工装置は、ミスト状にした切削油を工具の加工位置に供給して加工するようにした装置であり、切削油の使用量をできるだけ抑えて加工できるように考えられたものである。
たとえば、特許文献１に記載されているセミドライ加工装置は、ベンチュリー方式によって発生させたオイルミストを加工装置の内部に設けられたミスト管路および工具を支持するスピンドル内に設けられたミスト管路を経由して工具の加工位置に供給するように構成されており、特許文献２に記載されているセミドライ加工装置は、主軸内に非回転にミスト供給管を設け、ミスト供給管にミスト状にした切削油を送入することによって工具の加工位置にオイルミストを供給するように構成されている。
特開２００３−９４２８５号公報特開２００３−１４５３９２号公報 In a machine tool that performs machining such as cutting, lubrication of a cutting edge of a tool such as a drill is ensured, and machining is performed while supplying cutting oil to cool the cutting edge. The semi-dry processing apparatus is an apparatus that supplies a mist-like cutting oil to a processing position of a tool for processing, and is designed to perform processing while suppressing the amount of cutting oil used as much as possible.
For example, a semi-dry machining apparatus described in Patent Document 1 includes a mist pipe provided in a spindle for supporting a tool and a mist pipe provided in a machining apparatus for oil mist generated by a venturi system. The semi-dry machining apparatus described in Patent Document 2 is provided with a non-rotating mist supply pipe in the main shaft, and the mist supply pipe is formed in a mist shape. An oil mist is supplied to the machining position of the tool by feeding the cutting oil.
JP 2003-94285 A JP 2003-145392 A

しかしながら、主軸内に設けた流路を介してオイルミストを工具の加工位置に供給する構成とした場合は、工具を装着するホルダを交換等するためにホルダを主軸から取り外す際に、オイルミストが外部に漏出しないようオイルミストの供給を停止させる必要があり、ホルダの着脱操作が煩雑になるという問題がある。また、オイルミストの供給を停止した場合でも、オイルミストが主軸内に残留するから、主軸内に残留した切削油が外部に漏出するおそれもある。 However, when the oil mist is supplied to the processing position of the tool through the flow path provided in the main shaft, the oil mist is removed when the holder is removed from the main shaft in order to replace the holder on which the tool is mounted. It is necessary to stop the supply of oil mist so as not to leak to the outside, and there is a problem that the attaching / detaching operation of the holder becomes complicated. Even when the supply of the oil mist is stopped, the oil mist remains in the main shaft, so that the cutting oil remaining in the main shaft may leak to the outside.

ホルダを主軸に着脱する際に切削油が漏出する問題は、主軸側からホルダにオイルミストを供給する場合に限らず、主軸に設けた切削油供給路からホルダに切削油を供給する場合も同様に生じ得る。
本発明は、これらの課題を解決すべくなされたものであり、ホルダに切削油を供給する切削油供給路を備えた主軸にホルダを着脱する際に、切削油が漏出することを防止し、ホルダの主軸への着脱操作を容易にするとともに、切削油の使用量を削減することができる加工装置を提供しようとするものである。 The problem of cutting oil leakage when the holder is attached to and detached from the spindle is not limited to the case where oil mist is supplied to the holder from the spindle side, but the same applies when cutting oil is supplied to the holder from the cutting oil supply passage provided on the spindle. Can occur.
The present invention has been made to solve these problems, and prevents the cutting oil from leaking when the holder is attached to and detached from the main shaft having a cutting oil supply path for supplying the cutting oil to the holder. An object of the present invention is to provide a machining apparatus that facilitates the attaching / detaching operation of the holder to / from the spindle and can reduce the amount of cutting oil used.

本発明は上記目的を達成するため次の構成を備える。
すなわち、工具を支持するホルダと、該ホルダが着脱自在に装着されるホルダ装着部を有する主軸と、主軸を回転駆動する駆動機構とを備えた加工装置であって、前記主軸は、前記ホルダ装着部に装着された前記ホルダに切削油を供給する切削油供給路と、前記切削油供給路の開口部を前記ホルダの着脱に伴って開閉する開閉手段とを有し、前記開閉手段は、軸部の一端に開口するとともに外周面に連通する貫通孔を有するピストン部と、前記ピストン部が摺動自在であるとともに、該ピストン部の前記一端を前記ホルダ装着部に装着されたホルダに向けて突出させて収容するシリンダ部と、前記ピストン部を前記シリンダ部内に収容させる方向に付勢する付勢部とを有し、前記開閉手段は、前記ホルダ装着部に装着されたホルダと前記一端とが当接して押動され開くことを特徴とする。 In order to achieve the above object, the present invention comprises the following arrangement.
That is, a processing apparatus including a holder that supports a tool, a main shaft having a holder mounting portion on which the holder is detachably mounted, and a drive mechanism that rotationally drives the main shaft, the main shaft being mounted on the holder a cutting oil supply path for supplying cutting oil to said holder mounted on the section, the opening of the cutting oil supply path is closed and closing means for opening and closing with the attachment and detachment of the holder, the switching means, the axis A piston part having a through hole that opens at one end of the part and communicates with an outer peripheral surface; and the piston part is slidable, and the one end of the piston part is directed toward a holder attached to the holder mounting part. A cylinder portion that protrudes and accommodates; and an urging portion that urges the piston portion in a direction in which the piston portion is accommodated in the cylinder portion, wherein the opening / closing means includes a holder attached to the holder attachment portion and the one end. There wherein the opening is pushed in contact.

前記ホルダは、前記工具を支持する工具支持部と、前記ホルダ装着部に装着された状態で前記主軸と対向する対向部と、前記対向部から該ホルダ内に連通する切削油流路とを有し、前記開閉手段は、前記ホルダ装着部に装着されたホルダとの対向面に設けられ、前記切削油供給路と前記切削油流路とを連通させることを特徴とする。
また、前記主軸は、前記ホルダ装着部に装着されたホルダに、工業エアを供給するエア供給路を有し、前記ホルダは、前記エア供給路によって供給された工業エアと、前記切削油供給路によって供給された切削油とを霧状に混合してオイルミストを生成するミスト生成部を備え、該ミスト生成部で生成されたオイルミストを用いてセミドライ加工することを特徴とする。また、前記ホルダは、前記エア供給路によって供給された工業エアによって作動し、前記ミスト生成部への前記切削油流路で導かれる切削油の供給を制御する切削油供給制御バルブ機構を有することを特徴とする。 The holder includes a tool support portion that supports the tool, a facing portion that faces the main shaft when mounted on the holder mounting portion, and a cutting oil passage that communicates from the facing portion into the holder. The opening / closing means is provided on a surface facing the holder mounted on the holder mounting portion, and communicates the cutting oil supply passage and the cutting oil passage.
The spindle has an air supply path for supplying industrial air to a holder mounted on the holder mounting portion, and the holder includes industrial air supplied by the air supply path and the cutting oil supply path. The mist generation part which produces | generates oil mist by mixing with the cutting oil supplied by mist form is provided, and it semi-dry-processes using the oil mist produced | generated by this mist production | generation part, It is characterized by the above-mentioned. Further, the holder has a cutting oil supply control valve mechanism that is operated by industrial air supplied by the air supply path and controls the supply of cutting oil guided by the cutting oil flow path to the mist generating unit. It is characterized by.

また、工具を支持するホルダと、該ホルダが着脱自在に装着されるホルダ装着部を有する主軸と、主軸を回転駆動する駆動機構とを備えた加工装置であって、前記主軸は、前記ホルダ装着部に装着された前記ホルダに切削油を供給する切削油供給路と、前記切削油供給路の開口部を前記ホルダの着脱に伴って開閉する開閉手段と、前記ホルダ装着部に装着されたホルダに、工業エアを供給するエア供給路とを有し、前記ホルダは、前記エア供給路によって供給された工業エアと、前記切削油供給路によって供給された切削油とを霧状に混合してオイルミストを生成するミスト生成部と、前記エア供給路によって供給された工業エアによって作動し、前記ミスト生成部への前記切削油流路で導かれる切削油の供給を制御する切削油供給制御バルブ機構とを備え、前記ミスト生成部で生成されたオイルミストを用いてセミドライ加工することを特徴とする。
Further, a holder for supporting a tool, a machining apparatus having a main shaft having a holder mounting portion to which the holder is detachably attached, and a driving mechanism for rotating the spindle, said spindle, said holder mounting A cutting oil supply path for supplying cutting oil to the holder mounted on the part , an opening / closing means for opening / closing the opening of the cutting oil supply path with attachment / detachment of the holder, and a holder mounted on the holder mounting part to have an air supply path for supplying industrial air, the holder, and industrial air supplied by said air supply passage, a mixture of a cutting oil supplied to the mist by the cutting oil feed passage a mist generating unit for generating an oil mist, wherein actuated by supplied industrial air by an air supply passage, the cutting oil supply control Bal for controlling the supply of cutting oil to be guided by the cutting oil flow path to the mist generating unit And a mechanism, characterized by semi-dry process using an oil mist generated by the mist generation unit.

本発明に係る加工装置によれば、ホルダを主軸に着脱する際に主軸側から切削油が漏出することを防止することができ、主軸にホルダを着脱する操作を容易に行うことが可能となる。また、ホルダを着脱操作する際の切削油の漏出を防止することにより、切削油の使用量を削減することができる。 According to the processing apparatus according to the present invention, it is possible to prevent the cutting oil from leaking from the spindle side when the holder is attached to and detached from the spindle, and it is possible to easily perform the operation of attaching and detaching the holder to and from the spindle. . Moreover, the usage-amount of cutting oil can be reduced by preventing the leakage of the cutting oil at the time of attaching / detaching a holder.

図１〜６は、本発明に係る加工装置の実施形態の構成を示す。本実施形態の加工装置１は、駆動機構によって回転駆動される主軸１０に工具を保持するホルダ３０が脱着自在に装着され、ホルダ３０の内部にミスト生成部３００が設けられ、ホルダ３０に個別に供給される切削油と工業エアとがミスト生成部３００により霧状に混合されてオイルミストが生成され、ホルダ３０に保持された工具にオイルミストが供給されてセミドライ加工がなされるように構成されている。 1-6 shows the structure of embodiment of the processing apparatus which concerns on this invention. In the processing apparatus 1 according to the present embodiment, a holder 30 that holds a tool is detachably mounted on a spindle 10 that is rotationally driven by a drive mechanism, and a mist generating unit 300 is provided inside the holder 30, and the holder 30 is individually provided. The supplied cutting oil and industrial air are mixed in a mist form by the mist generating unit 300 to generate oil mist, and the oil mist is supplied to the tool held in the holder 30 to perform semi-dry processing. ing.

図１は、加工装置１の全体構成を示すものであり、図２はホルダ３０の構成と加工装置１のミスト生成部３００の非作動状態、図３はミスト生成部３００の作動状態を示すものであり、図４はホルダの内部構成を拡大して示すものである。また、図５はミスト生成部３００におけるエア流路の配置を示し、図６はホルダ３０の主軸１０への着脱操作に伴って切削油供給路の開口部を開閉する開閉手段としての開閉バルブ部９０の構成を示す。以下、本実施形態の加工装置１について、主軸１０、ホルダ３０、ミスト生成部３００、開閉バルブ部９０の構成について順に説明する。 FIG. 1 shows the overall configuration of the processing apparatus 1, FIG. 2 shows the configuration of the holder 30 and the non-operating state of the mist generating unit 300 of the processing apparatus 1, and FIG. 3 shows the operating state of the mist generating unit 300. FIG. 4 shows an enlarged internal configuration of the holder. 5 shows the arrangement of the air flow paths in the mist generating section 300, and FIG. 6 shows an opening / closing valve section as an opening / closing means for opening / closing the opening of the cutting oil supply path in accordance with the attaching / detaching operation of the holder 30 to / from the main shaft 10. 90 configurations are shown. Hereinafter, about the processing apparatus 1 of this embodiment, the structure of the main axis | shaft 10, the holder 30, the mist production | generation part 300, and the on-off valve part 90 is demonstrated in order.

〔主軸の構成〕
まず、図１にしたがって、主軸１０の構成について説明する。
主軸１０は外筒１０ｂと外筒１０ｂに軸線の回りで回転自在に支持された主軸本体１０ａとを備える。主軸本体１０ａは回転駆動機構（不図示）により軸線の回りに回転駆動される。主軸本体１０ａの一端部にはホルダ３０を主軸１０に着脱自在に装着するホルダ装着部１１０が設けられている。ホルダ装着部１１０はホルダ３０に形成された嵌合部３３が摺入する嵌合凹部１１と、ホルダ３０の他端部から外方に突出する係合突起部３４が嵌入する係合凹部１２とからなる。 [Spindle configuration]
First, the configuration of the main shaft 10 will be described with reference to FIG.
The main shaft 10 includes an outer cylinder 10b and a main body 10a that is rotatably supported by the outer cylinder 10b around an axis. The main spindle body 10a is rotationally driven around an axis line by a rotational drive mechanism (not shown). A holder mounting portion 110 for detachably mounting the holder 30 to the main shaft 10 is provided at one end of the main shaft body 10a. The holder mounting portion 110 includes a fitting recess 11 into which a fitting portion 33 formed in the holder 30 is slid, and an engagement recess 12 into which an engaging protrusion 34 protruding outward from the other end of the holder 30 is inserted. Consists of.

嵌合凹部１１の開口側の内周面は内方に向けて徐々に縮径する円錐状面１１ａに形成され、ホルダ３０に形成された嵌合部３３も他端側に向けて徐々に縮径する円錐状面３３ａに形成され、主軸１０のホルダ装着部１１０にホルダ３０を装着した際に円錐状面１１ａ、３３ａは気密にシールされた状態で摺接するように形成されている。
主軸本体１０ａの軸芯には軸線方向に貫通孔１３が貫設され、嵌合凹部１１の内端部の位置に内部ブロック１４が嵌入固定され、内部ブロック１４の嵌合凹部１１側の内側面に係合凹部１２が凹設されている。係合凹部１２の内周面には、内側に外面を若干突出させるようにして、複数個の係合ボール１５が周方向に所定間隔をあけて係止されている。 The inner peripheral surface on the opening side of the fitting recess 11 is formed as a conical surface 11a that gradually decreases in diameter toward the inside, and the fitting portion 33 formed in the holder 30 is also gradually reduced toward the other end side. The conical surfaces 11a and 33a are formed so as to be in sliding contact with each other when the holder 30 is mounted on the holder mounting portion 110 of the main shaft 10 in a hermetically sealed state.
A through hole 13 is provided in the axial direction in the shaft core of the main spindle body 10a, and the inner block 14 is fitted and fixed at the position of the inner end of the fitting recess 11, and the inner surface of the inner block 14 on the fitting recess 11 side. The engaging recess 12 is provided in the recess. A plurality of engagement balls 15 are locked to the inner peripheral surface of the engagement recess 12 at a predetermined interval in the circumferential direction so that the outer surface slightly protrudes inward.

主軸１０の貫通孔１３に嵌入固定される内部ブロック１４の外周面にはＯリング１１４が装着され、内部ブロック１４の外周面と貫通孔１３の内周面との間が気密および液密にシールされる。
内部ブロック１４の中央部には、軸線方向に直交する向きに流路１６ａが貫通して設けられ、この流路１６ａに連通して内部ブロック１４の他端側に内挿管１６が挿入されて連結されている。内挿管１６と内部ブロック１４の内挿管１６が挿入される挿入孔の内周面との間にもＯリング１１６が介装され、内挿管１６と内部ブロック１４との間が液密にシールされている。 An O-ring 114 is attached to the outer peripheral surface of the inner block 14 fitted and fixed in the through hole 13 of the main shaft 10, and the space between the outer peripheral surface of the inner block 14 and the inner peripheral surface of the through hole 13 is hermetically and liquid tightly sealed. Is done.
A flow path 16a is provided through the central portion of the inner block 14 in a direction perpendicular to the axial direction, and the inner tube 16 is inserted into the other end side of the inner block 14 so as to communicate with the flow path 16a. Has been. An O-ring 116 is also interposed between the inner tube 16 and the inner peripheral surface of the insertion hole into which the inner tube 16 of the inner block 14 is inserted, and the space between the inner tube 16 and the inner block 14 is liquid-tightly sealed. ing.

内挿管１６は主軸１０の軸線方向に、主軸１０の他端側にまで延出するように設けられている。内挿管１６の他端部では内挿管１６の流路１６ｂに連通して切削油供給部１４０が接続されている。内挿管１６と切削油供給部１４０とは、たとえば内挿管１６の端部に回転継手を介して接続される。切削油供給部１４０は、内挿管１６の管内を通過する流路１６ｂに供給する切削油の供給圧力、供給量を適宜制御可能に設けられている。 The inner tube 16 is provided so as to extend to the other end side of the main shaft 10 in the axial direction of the main shaft 10. At the other end of the inner intubation 16, a cutting oil supply unit 140 is connected to the flow path 16 b of the inner intubation 16. For example, the inner intubation 16 and the cutting oil supply unit 140 are connected to the end of the inner intubation 16 via a rotary joint. The cutting oil supply unit 140 is provided such that the supply pressure and supply amount of the cutting oil supplied to the flow path 16b passing through the inside of the inner tube 16 can be appropriately controlled.

内部ブロック１４に設けられている流路１６ａには、主軸本体１０ａの軸芯から偏芯した一端部に設けられている開閉バルブ部９０との間を連絡する流路１６ｃが接続する。流路１６ｃは、主軸本体１０ａの周側面から流路１６ａに通じる連絡孔１７を設け、開閉バルブ部９０のシリンダ室９１と連絡孔１７の中途とを接続するように接続孔１８を設けることによって形成される。
こうして、切削油供給部１４０と開閉バルブ部９０とが、流路１６ｂ、１６ａ、１６ｃを介して連通する。本実施形態において、流路１６ａ、１６ｂ、１６ｃは切削油供給部１４０から供給される切削油を供給する切削油供給路を構成する。 The flow path 16a provided in the internal block 14 is connected to a flow path 16c that communicates with the open / close valve section 90 provided at one end that is eccentric from the axis of the main spindle body 10a. The flow path 16c is provided with a communication hole 17 that communicates from the peripheral side surface of the main spindle body 10a to the flow path 16a, and by providing a connection hole 18 so as to connect the cylinder chamber 91 of the on-off valve portion 90 and the middle of the communication hole 17. It is formed.
Thus, the cutting oil supply unit 140 and the opening / closing valve unit 90 communicate with each other via the flow paths 16b, 16a, and 16c. In the present embodiment, the flow paths 16 a, 16 b, and 16 c constitute a cutting oil supply path that supplies cutting oil supplied from the cutting oil supply unit 140.

また、主軸本体１０ａの他端部には、主軸本体１０ａにロータリーシール２４が外挿され、ロータリーシール２４に設けられたポート２０に工業エア供給部２００が接続されている。
ロータリーシール２４の内周面に摺接する主軸本体１０ａの外周面には、エア溝２２が周設され、エア溝２２は連絡流路２３を介して、主軸本体１０ａの軸線方向に内設されたエア流路２５に連通する。
エア流路２５は主軸１０の偏芯位置に設けられ、主軸本体１０ａの軸線方向と平行に主軸本体１０ａの一端部側に延出し、その延出端が嵌合凹部１１の内面で開口する。エア流路２５が嵌合凹部１１の内面で開口する位置は、ホルダ３０を主軸１０に装着した際にホルダ３０の嵌合部３３によって開口部が遮断されない位置、具体的には、嵌合凹部１１の円錐状面１１ａよりも内側の円筒状面に形成されている部位である。 In addition, a rotary seal 24 is extrapolated to the main spindle body 10 a at the other end of the main spindle body 10 a, and an industrial air supply unit 200 is connected to a port 20 provided in the rotary seal 24.
An air groove 22 is provided on the outer peripheral surface of the main spindle body 10 a that is in sliding contact with the inner peripheral surface of the rotary seal 24, and the air groove 22 is provided in the axial direction of the main spindle body 10 a via a communication channel 23. It communicates with the air flow path 25.
The air flow path 25 is provided at an eccentric position of the main shaft 10, extends to one end portion side of the main shaft main body 10 a in parallel with the axial direction of the main shaft main body 10 a, and the extended end opens at the inner surface of the fitting recess 11. The position where the air flow path 25 opens at the inner surface of the fitting recess 11 is a position where the opening is not blocked by the fitting portion 33 of the holder 30 when the holder 30 is mounted on the main shaft 10, specifically, the fitting recess. 11 is a portion formed on a cylindrical surface inside the conical surface 11a.

本実施形態では、主軸本体１０ａの一端面から軸線方向に平行に流路孔２５ａを形成し、流路孔２５ａに交差する配置で、主軸本体１０ａの周側面から嵌合凹部１１の内面にまで通じる流路孔２５ｂを形成し、ロータリーシール２４の周側面からエア溝２２まで通じる流路孔２５ｃを設けてポート２０から嵌合凹部１１の内面まで通じるエア流路２５を形成した。
こうして、エア流路２５を介して工業エア供給部２００と嵌合凹部１１の内面との間が連通し、工業エア供給部２００から嵌合凹部１１の内面に向けて工業エアが供給可能となる。本実施形態において、エア流路２５は工業エア供給部２００から工業エアを供給するエア供給路を構成する。工業エア供給部２００は、切削油供給部１４０とは独立にエア供給圧力、エア供給量が制御されるように設けられている。 In the present embodiment, the flow passage hole 25a is formed in parallel to the axial direction from one end surface of the main spindle body 10a, and is arranged so as to intersect the flow passage hole 25a, from the peripheral side surface of the main spindle body 10a to the inner surface of the fitting recess 11. A flow passage hole 25 b that communicates with the rotary seal 24 and a flow passage hole 25 c that communicates from the peripheral side surface of the rotary seal 24 to the air groove 22 is formed to form the air flow passage 25 that communicates from the port 20 to the inner surface of the fitting recess 11.
In this way, the industrial air supply unit 200 and the inner surface of the fitting recess 11 communicate with each other via the air flow path 25, and industrial air can be supplied from the industrial air supply unit 200 toward the inner surface of the fitting recess 11. . In the present embodiment, the air flow path 25 constitutes an air supply path for supplying industrial air from the industrial air supply unit 200. The industrial air supply unit 200 is provided such that the air supply pressure and the air supply amount are controlled independently of the cutting oil supply unit 140.

〔ホルダの構成〕
次に、図２にしたがってホルダ３０の主軸１０への取り付け構造、およびホルダ３０の内部に装着される第１のピース５０、第２のピース６０、第３のピース７０の構成について説明する。
ホルダ３０は軸芯を貫通して貫通孔３１が設けられた略円筒状に形成され、その一端にドリル等の工具を着脱可能に装着するコレット３２が設けられ、他端側に嵌合部３３が設けられている。貫通孔３１の一端側は工具を装着する円錐状面３１ａに形成され、円錐状面３１ａはコレット３２とともに工具支持部１３２を構成する。ホルダ３０に形成されている貫通孔３１の中間部は円錐状面３１ａの縮径部と略同径に形成され、嵌合部３３を貫通する部位では中間部よりも細径に形成されている。 [Configuration of holder]
Next, a structure for attaching the holder 30 to the main shaft 10 and the configuration of the first piece 50, the second piece 60, and the third piece 70 mounted in the holder 30 will be described with reference to FIG.
The holder 30 is formed in a substantially cylindrical shape having a through-hole 31 extending through the shaft core, and a collet 32 for detachably attaching a tool such as a drill is provided at one end thereof, and a fitting portion 33 is provided at the other end side. Is provided. One end side of the through hole 31 is formed in a conical surface 31a on which a tool is mounted, and the conical surface 31a constitutes a tool support portion 132 together with the collet 32. The intermediate part of the through hole 31 formed in the holder 30 is formed to have substantially the same diameter as the reduced diameter part of the conical surface 31a, and the part passing through the fitting part 33 is formed to have a smaller diameter than the intermediate part. .

ホルダ３０の他端部には、係合突起部３４とねじ込み部３５ａとが一体に形成された突起ピース３５が、係合突起部３４を軸線方向の他端側に突出させ、ねじ込み部３５ａがねじ部３１ｂにねじ込まれて固定されている。係合突起部３４の基部は、嵌合部３３の端面径と略同径の拡径部３５ｂに形成され、突起ピース３５をホルダ３０に固定した状態で拡径部３５ｂの端面が嵌合部３３の他端面に当接し、貫通孔３１を閉止する。
突起ピース３５の拡径部３５ｂには、ねじ込み部３５ａの内部に連通する連絡孔３６が、軸線方向に直交する向きに貫通して、周方向に複数設けられている。
突起ピース３５の他端部にはホルダ３０をホルダ装着部１１０に装着した際に、係合凹部１２に設けられた係合ボール１５を超えて嵌入する球状部３４ａが設けられる。 At the other end of the holder 30, a projection piece 35, in which an engagement projection 34 and a screwed portion 35a are integrally formed, projects the engagement projection 34 to the other end side in the axial direction, and the screwed portion 35a is formed. It is fixed by being screwed into the screw part 31b. The base portion of the engaging protrusion 34 is formed in an enlarged portion 35 b having substantially the same diameter as the end face diameter of the fitting portion 33, and the end surface of the enlarged diameter portion 35 b is fitted to the fitting portion with the protrusion piece 35 fixed to the holder 30. It abuts on the other end surface of 33 and closes the through hole 31.
In the enlarged diameter portion 35b of the projection piece 35, a plurality of communication holes 36 communicating with the inside of the screwed portion 35a are provided in the circumferential direction so as to penetrate in a direction orthogonal to the axial direction.
The other end of the projection piece 35 is provided with a spherical portion 34a that fits over the engaging ball 15 provided in the engaging recess 12 when the holder 30 is mounted on the holder mounting portion 110.

ホルダ３０に形成された貫通孔３１内には、突起ピース３５に対向して第１のピース５０が装着され、第２のピース６０と、第３のピース７０とがこの順に隣接して装着される。
以下では、ホルダ３０の内部構成を拡大して示している図４にしたがって、第１のピース５０と第２のピース６０と第３のピース７０のホルダ３０内における配置および構成について説明する。 In the through hole 31 formed in the holder 30, the first piece 50 is mounted facing the protruding piece 35, and the second piece 60 and the third piece 70 are mounted adjacent to each other in this order. The
Hereinafter, the arrangement and configuration of the first piece 50, the second piece 60, and the third piece 70 in the holder 30 will be described with reference to FIG.

第１のピース５０は、突起ピース３５に対向する側が細径部５０ａに、第２のピース６０が装着される側が太径部５０ｂに形成され、貫通孔３１の内周面に形成されたねじ部３１ｃに細径部５０ａをねじ込むことによってホルダ３０に固定される。第１のピース５０は、貫通孔３１に細径部５０ａをねじ込む際に、貫通孔３１の拡径部と小径部の段差面に太径部５０ｂの端面が当接することによってホルダ３０内で位置決めされる。第１のピース５０の細径部５０ａと太径部５０ｂの外周面にはＯリング５１が装着され、第１のピース５０をホルダ３０に装着した際に、第１のピース５０の外周面と貫通孔３１の内周面との間で工業エアおよび切削油が漏出しないようシールされる。 The first piece 50 is a screw formed on the inner peripheral surface of the through hole 31 with the side facing the protruding piece 35 formed in the small diameter portion 50a and the side on which the second piece 60 is mounted formed in the large diameter portion 50b. The small diameter part 50a is screwed into the part 31c and fixed to the holder 30. The first piece 50 is positioned in the holder 30 when the end surface of the large-diameter portion 50b comes into contact with the stepped surface of the large-diameter portion and the small-diameter portion of the through-hole 31 when the small-diameter portion 50a is screwed into the through-hole 31. Is done. An O-ring 51 is attached to the outer peripheral surfaces of the small-diameter portion 50a and the large-diameter portion 50b of the first piece 50, and when the first piece 50 is attached to the holder 30, the outer peripheral surface of the first piece 50 It is sealed so that industrial air and cutting oil do not leak between the inner peripheral surface of the through hole 31.

第１のピース５０には軸芯方向に貫通孔５０ｃが形成されている。第１のピース５０に隣接して配置される第２のピース６０には、その他端部側に、第１のピース５０に形成された貫通孔５０ｃに摺入される細径部６０ａが形成されている。細径部６０ａの外周面にはＯリング６１、６１が装着され、細径部６０ａを貫通孔５０ｃに嵌入することにより、第１のピース５０と第２のピース６０とが気密かつ液密にシールされた状態で接続される。第２のピース６０は、細径部６０ａを貫通孔５０ｃに嵌入した際に、第１のピース５０の太径部５０ｂと同径に形成されたフランジ部６０ｂの端面が第１のピース５０の一端面に当接することにより、第１のピース５０に対して位置決めされる。 A through hole 50c is formed in the first piece 50 in the axial direction. The second piece 60 disposed adjacent to the first piece 50 is formed with a small-diameter portion 60a that is slid into a through hole 50c formed in the first piece 50 on the other end side. ing. O-rings 61 and 61 are mounted on the outer peripheral surface of the small-diameter portion 60a, and the first piece 50 and the second piece 60 are airtight and liquid-tight by fitting the small-diameter portion 60a into the through hole 50c. Connected in a sealed state. The second piece 60 has an end face of the flange portion 60b formed to have the same diameter as the large diameter portion 50b of the first piece 50 when the small diameter portion 60a is inserted into the through hole 50c. Positioning with respect to the first piece 50 by contacting the one end surface.

第２のピース６０は第２のピース６０の前側に配置されるスペーサ８０とともに第１のピース５０に連結される。すなわち、第２のピース６０はスペーサ８０の前側からスペーサ８０と第２のピース６０とをねじ８１により第１のピース５０にねじ止めされ、第１のピース５０に固定される。
スペーサ８０に隣接して配置される第３のピース７０は、貫通孔３１の一方側から貫通孔３１の内周面に設けたねじ部３１ｄにねじ込むことによってホルダ３０に固定される。第３のピース７０の他端面がスペーサ８０の端面に当接することにより、第３のピース７０のねじ込み位置が規定される。第３のピース７０と貫通孔３１の内周面との間も第３のピース７０の外周面に装着されたＯリング７１によって気密および液密にシールされる。 The second piece 60 is connected to the first piece 50 together with a spacer 80 disposed on the front side of the second piece 60. That is, the second piece 60 is fixed to the first piece 50 by screwing the spacer 80 and the second piece 60 to the first piece 50 with the screw 81 from the front side of the spacer 80.
The third piece 70 disposed adjacent to the spacer 80 is fixed to the holder 30 by being screwed into a screw portion 31 d provided on the inner peripheral surface of the through hole 31 from one side of the through hole 31. When the other end surface of the third piece 70 comes into contact with the end surface of the spacer 80, the screwing position of the third piece 70 is defined. The space between the third piece 70 and the inner peripheral surface of the through hole 31 is also hermetically and liquid-tightly sealed by the O-ring 71 attached to the outer peripheral surface of the third piece 70.

このように、本実施形態ではホルダ３０の内部に、第１のピース５０、第２のピース６０、スペーサ８０および第３のピース７０が相互に隣接した配置で、気密および液密にシールされた状態で装着されている。第１のピース５０および第３のピース７０はホルダ３０の貫通孔３１にねじ込むことによって装着されるから、これらの各ピースをホルダ３０に装着したり、各ピースを交換してホルダ３０に装着する操作は容易に可能となる。 Thus, in this embodiment, the first piece 50, the second piece 60, the spacer 80, and the third piece 70 are hermetically and liquid-tightly sealed in the holder 30 in an arrangement adjacent to each other. It is installed in a state. Since the first piece 50 and the third piece 70 are mounted by screwing into the through hole 31 of the holder 30, each of these pieces is mounted on the holder 30, or each piece is replaced and mounted on the holder 30. Operation is easily possible.

〔ミスト生成部の構成〕
次に、ホルダ３０内において切削油と工業エアとを霧状に混合してオイルミストを生成するミスト生成部３００の構成について説明する。ミスト生成部３００はホルダ３０に個別に供給される切削油と工業エアとを霧状に混合してオイルミストを生成するミキシング部２７０と、ミキシング部２７０へ工業エアを供給するとともにミキシング部２７０への切削油の供給を制御する切削油供給制御バルブ機構２６０とを備える。
以下、切削油供給制御バルブ機構２６０とミキシング部２７０の順に説明する。 [Configuration of mist generator]
Next, the structure of the mist production | generation part 300 which mixes cutting oil and industrial air in the inside of a mist in the holder 30 and produces | generates oil mist is demonstrated. The mist generating unit 300 mixes cutting oil and industrial air separately supplied to the holder 30 in a mist to generate oil mist, supplies industrial air to the mixing unit 270, and supplies the industrial air to the mixing unit 270. And a cutting oil supply control valve mechanism 260 for controlling the supply of the cutting oil.
Hereinafter, the cutting oil supply control valve mechanism 260 and the mixing unit 270 will be described in this order.

切削油供給制御バルブ機構２６０は工業エア供給部２００から供給される工業エアの供給圧力によって開弁する工業エア弁部２５０と、工業エア弁部２５０と一体に形成され工業エア弁部２５０の開弁とともにミキシング部２７０への切削油の供給路を開弁する切削油弁部２５５を備える。
第１のピース５０には、主軸１０からホルダ３０に供給される工業エアの供給圧力によって押動されるピストン５２が、第１のピース５０に設けられた貫通孔５０ｃに内挿されて配置されている。貫通孔５０ｃ内でピストン５２が可動となる範囲がピストン５２が軸線方向に摺動するシリンダ５３となる。ピストン５２は、突起ピース３５に対向する先端部が閉止した円筒体状に形成され、ピストン５２の先端部は工業エアの供給を制御する弁体５２ａに形成されている。 The cutting oil supply control valve mechanism 260 is formed integrally with the industrial air valve unit 250 and the industrial air valve unit 250 which is opened by the supply pressure of industrial air supplied from the industrial air supply unit 200. A cutting oil valve portion 255 that opens a supply passage of the cutting oil to the mixing portion 270 together with the valve is provided.
In the first piece 50, a piston 52 that is pushed by the supply pressure of industrial air supplied from the main shaft 10 to the holder 30 is disposed so as to be inserted into a through hole 50 c provided in the first piece 50. ing. The range in which the piston 52 is movable in the through hole 50c is the cylinder 53 in which the piston 52 slides in the axial direction. The piston 52 is formed in the shape of a cylinder whose front end facing the projection piece 35 is closed, and the front end of the piston 52 is formed in a valve body 52a that controls the supply of industrial air.

シリンダ５３の突起ピース３５に対向する端部は、弁体５２ａが当接した際に閉止される開口部５４ａが設けられた弁座５４として形成され、弁体５２ａの内面と第２のピース６０の他端面との間には、弁体５２ａが弁座５４に当接する向きにピストン５２を付勢するリターン手段としてのスプリング５５が介装されている。
これら弁体５２ａを備えたピストン５２、弁座５４、シリンダ５３およびスプリング５５が工業エア弁部２５０を構成する。 An end portion of the cylinder 53 facing the protruding piece 35 is formed as a valve seat 54 provided with an opening 54a that is closed when the valve body 52a comes into contact with the inner surface of the valve body 52a and the second piece 60. A spring 55 serving as a return means for biasing the piston 52 in a direction in which the valve body 52a abuts the valve seat 54 is interposed between the other end surface of the valve 52a.
The piston 52, the valve seat 54, the cylinder 53, and the spring 55 provided with these valve bodies 52a constitute the industrial air valve portion 250.

ピストン５２の先端部の周側面にはピストン５２の内外を連通する導入口５６が設けられ、シリンダ５３の、ピストン５２が進退動する際にピストン５２の先端部が移動する範囲については、内周径がピストン５２の外周径よりも若干拡径して設けられ、導入口５６の周縁部とシリンダ５３の内周面との間に隙間が設けられている。 An introduction port 56 that communicates the inside and outside of the piston 52 is provided on the peripheral side surface of the tip portion of the piston 52. The range of the cylinder 53 in which the tip portion of the piston 52 moves when the piston 52 moves forward and backward The diameter is provided slightly larger than the outer peripheral diameter of the piston 52, and a gap is provided between the peripheral edge of the introduction port 56 and the inner peripheral surface of the cylinder 53.

シリンダ５３は一端側で、第２のピース６０の他端部に設けた凹部６０ｃに連通し、凹部６０ｃの内側面に開口する連絡流路６２ａ、第１のピース５０に設けた流路５８、および第２のピース６０に設けた連絡流路６２ｂを介して、第２のピース６０とスペーサ８０との間の空隙部８２に連通する。
これらの連絡流路６２ａ、６２ｂ、流路５８は工業エアをミキシング部２７０に供給するエア流路となる。 The cylinder 53 is connected to a recess 60c provided at the other end of the second piece 60 on one end side, a communication channel 62a that opens on the inner surface of the recess 60c, a channel 58 provided in the first piece 50, In addition, the communication channel 62 b provided in the second piece 60 communicates with the gap 82 between the second piece 60 and the spacer 80.
These communication flow paths 62 a and 62 b and the flow path 58 serve as air flow paths for supplying industrial air to the mixing unit 270.

図５は、第１のピース５０に設けられている流路５８を第１のピース５０の軸線方向から見た配置を示す。連絡流路６２ａはシリンダ５３から、周方向に１２０°間隔で三方に分岐して延出するように配置され、各々の連絡流路６２ａの端部に流路５８が接続し、連絡流路６２ｂが第２のピース６０に設けられたフランジ部６０ｂの３個所で開口する（図４参照）。 FIG. 5 shows an arrangement in which the flow path 58 provided in the first piece 50 is viewed from the axial direction of the first piece 50. The communication channel 62a is arranged to extend from the cylinder 53 in three directions at intervals of 120 ° in the circumferential direction, and a channel 58 is connected to the end of each communication channel 62a. Opens at three locations of the flange portion 60b provided on the second piece 60 (see FIG. 4).

一方、第１のピース５０には切削油を供給するための切削油流路としての流路５９ａ、５９ｂがピストン５２およびシリンダ５３を挟んで対向する配置、すなわち切削油流路に対してシリンダ５３が横断する配置に設けられている。流路５９ａは主軸１０側から供給される切削油がシリンダ５３に流入する側であり、流路５９ｂは切削油がシリンダ５３から流出する側であって、シリンダ５３の内面に切削油の流入口と流出口が開口する。 On the other hand, in the first piece 50, the flow paths 59a and 59b as cutting oil flow paths for supplying cutting oil are opposed to each other with the piston 52 and the cylinder 53 interposed therebetween, that is, the cylinder 53 with respect to the cutting oil flow path. Are provided in a transverse arrangement. The flow path 59a is the side from which the cutting oil supplied from the main shaft 10 side flows into the cylinder 53, and the flow path 59b is the side from which the cutting oil flows out from the cylinder 53, and the inlet of the cutting oil to the inner surface of the cylinder 53 And the outlet opens.

流路５９ａは第１のピース５０の太径部５０ｂの周側面で、ホルダ３０に設けられている流路３８に連通する。流路３８はホルダ３０を主軸１０に装着した際に、主軸１０に設けられた切削油供給路に連通する配置に設けられている。
一方、流路５９ｂは、軸線方向に平行に第１のピース５０に内設された流路５９ｃと第２のピース６０に設けられた連絡流路６４ｂを介してノズル部６４の流路６４ａに連通する。これらの流路３８、５９ａ、５９ｂ、５９ｃ、６４ａ、６４ｂはホルダ３０内で切削油をミキシング部２７０に導く切削油流路を構成する。 The channel 59 a communicates with the channel 38 provided in the holder 30 on the peripheral side surface of the large-diameter portion 50 b of the first piece 50. The flow path 38 is provided in an arrangement that communicates with a cutting oil supply path provided in the main shaft 10 when the holder 30 is mounted on the main shaft 10.
On the other hand, the flow path 59b is connected to the flow path 64a of the nozzle part 64 via the flow path 59c provided in the first piece 50 in parallel with the axial direction and the communication flow path 64b provided in the second piece 60. Communicate. These flow paths 38, 59 a, 59 b, 59 c, 64 a, 64 b constitute a cutting oil flow path that guides cutting oil to the mixing unit 270 within the holder 30.

シリンダ５３の内周面に沿って摺動自在に設けられたピストン５２の外周面には、切削油連通溝５７が周方向に周設されている。この切削油連通溝５７はピストン５２が開弁位置にあるときにのみ流路５９ａと流路５９ｃとを連通する位置に設けられる。ピストン５２は弁体５２ａが弁座５４に当接する閉弁位置と、ピストン５２の一端面が第２のピース６０の細径部６０ａの他端面に当接する開弁位置との間で進退動可能であり、ピストン５２が閉弁位置にある状態で切削油連通溝５７と流路５９ａ、５９ｂとは重複しない位置にあり、ピストン５２が開弁位置に移動した際に切削油連通溝５７と流路５９ａ、５９ｂのシリンダ５３の内面における流入口、流出口との位置が一致するように設けられている。すなわち、ピストン５２およびピストン５２の外周面に設けられた切削油連通溝５７は工業エア弁部２５０の開弁とともにミキシング部２７０への切削油の供給路を開弁する切削油弁部２５５を構成する。 A cutting oil communication groove 57 is provided in the circumferential direction on the outer peripheral surface of the piston 52 slidably provided along the inner peripheral surface of the cylinder 53. The cutting oil communication groove 57 is provided at a position where the flow path 59a and the flow path 59c communicate with each other only when the piston 52 is in the valve open position. The piston 52 can be moved back and forth between a valve closing position where the valve body 52 a comes into contact with the valve seat 54 and a valve opening position where one end face of the piston 52 comes into contact with the other end face of the small diameter portion 60 a of the second piece 60. When the piston 52 is in the valve closing position, the cutting oil communication groove 57 and the flow paths 59a and 59b are not overlapped with each other. When the piston 52 is moved to the valve opening position, the cutting oil communication groove 57 and the flow path The passages 59a and 59b are provided so that the positions of the inlet and the outlet on the inner surface of the cylinder 53 coincide with each other. That is, the cutting oil communication groove 57 provided on the outer peripheral surface of the piston 52 and the piston 52 constitutes the cutting oil valve portion 255 that opens the cutting air supply passage to the mixing portion 270 together with the opening of the industrial air valve portion 250. To do.

第２のピース６０には、切削油を吐出する管状に形成されたノズル部６４が、ホルダ３０と同芯に噴霧ノズル部としての第３のピース７０に向けて先端部を延出して設けられている。第３のピース７０にはノズル部６４が挿入されるノズル挿入孔７２が形成され、第２のピース６０と第３のピース７０とを組み合わせた状態で、ノズル部６４の先端側がノズル挿入孔７２に部分的に挿入され、ノズル挿入孔７２と空隙部８２とが連通する。ノズル部６４の外周面とノズル挿入孔７２の内周面との隙間部分は狭間隔に設定され、工業エアをノズル部６４の先端の外周に沿って吐出する工業エア吐出部７３となる。 The second piece 60 is provided with a nozzle portion 64 that is formed in a tubular shape for discharging cutting oil, and is concentrically provided with the holder 30 so as to extend toward the third piece 70 as a spray nozzle portion. ing. A nozzle insertion hole 72 into which the nozzle portion 64 is inserted is formed in the third piece 70, and in the state where the second piece 60 and the third piece 70 are combined, the distal end side of the nozzle portion 64 is the nozzle insertion hole 72. The nozzle insertion hole 72 and the gap 82 communicate with each other. A gap portion between the outer peripheral surface of the nozzle portion 64 and the inner peripheral surface of the nozzle insertion hole 72 is set at a narrow interval, and becomes an industrial air discharge portion 73 that discharges industrial air along the outer periphery of the tip of the nozzle portion 64.

なお、スペーサ８０にもノズル挿入孔７２と同径のノズル部６４が挿入されるノズル挿通孔８３が設けられている。
第３のピース７０の一端側は端面側が徐々に拡径する円錐状面に形成された開口部７４が設けられている。開口部７４とノズル挿入孔７２とは、軸中心に設けられた噴射孔７５を介して連通する。本実施形態では噴射孔７５を六角孔に形成し、六角レンチを用いて第３のピース７０を回動してホルダ３０に着脱可能としている。 The spacer 80 is also provided with a nozzle insertion hole 83 into which the nozzle portion 64 having the same diameter as the nozzle insertion hole 72 is inserted.
One end side of the third piece 70 is provided with an opening 74 formed in a conical surface whose diameter gradually increases on the end surface side. The opening 74 and the nozzle insertion hole 72 communicate with each other via an injection hole 75 provided at the center of the shaft. In the present embodiment, the injection hole 75 is formed in a hexagonal hole, and the third piece 70 is rotated using a hexagonal wrench so as to be detachable from the holder 30.

切削油と工業エアとを霧状に混合してオイルミストを生成させるミキシング部２７０は、ホルダ３０に設けられた切削油流路を介して供給される切削油が吐出されるノズル部６４と、切削油供給制御バルブ機構２６０を介して供給される工業エアを吐出させる工業エア吐出部７３と、ノズル挿入孔７２、開口部７４、噴射孔７５を備える噴霧ノズル部としての第３のピース７０とからなる。 The mixing unit 270 that mixes cutting oil and industrial air in a mist to generate oil mist includes a nozzle unit 64 from which cutting oil supplied through a cutting oil channel provided in the holder 30 is discharged, An industrial air discharge portion 73 that discharges industrial air supplied through the cutting oil supply control valve mechanism 260, and a third piece 70 as a spray nozzle portion including a nozzle insertion hole 72, an opening portion 74, and an injection hole 75; Consists of.

〔開閉バルブ部の構成〕
次に、主軸１０からホルダ３０への切削油の供給を制御する、開閉手段としての開閉バルブ部９０の構成について説明する。
図６に、開閉バルブ部９０の構成を拡大して示す。開閉バルブ部９０は、主軸１０内に形成された切削油供給路としての流路１６ｃに連通して設けられたシリンダ室９１内に円筒状に形成されたシリンダ部９５が配置され、シリンダ部９５にピストン部９２が摺動自在に装着され、付勢部としてのリターンスプリング９７がピストン部９２をシリンダ部９５に収容させる向きに付勢して設けられている。シリンダ部９５の外周面にはＯリングが装着され、シリンダ部９５とシリンダ室９１の内周面との間が液密にシールされる。 [Configuration of open / close valve]
Next, the configuration of the opening / closing valve unit 90 as an opening / closing means for controlling the supply of the cutting oil from the main shaft 10 to the holder 30 will be described.
FIG. 6 shows an enlarged configuration of the opening / closing valve unit 90. In the opening / closing valve portion 90, a cylinder portion 95 formed in a cylindrical shape is disposed in a cylinder chamber 91 provided in communication with a flow passage 16 c as a cutting oil supply passage formed in the main shaft 10. The piston portion 92 is slidably attached to the piston portion 92, and a return spring 97 as an urging portion is provided to urge the piston portion 92 in a direction in which the piston portion 92 is accommodated in the cylinder portion 95. An O-ring is attached to the outer peripheral surface of the cylinder portion 95, and the space between the cylinder portion 95 and the inner peripheral surface of the cylinder chamber 91 is sealed in a liquid-tight manner.

ピストン部９２はシリンダ部９５に摺動自在に内挿される円筒状に形成された軸部９２ａと、軸部９２ａの他端部に軸部９２ａと一体に形成された、軸部９２ａよりも径大のストッパ部９２ｂとからなる。軸部９２ａとストッパ部９２ｂとが連結する位置の軸部９２ａには、周側面から軸部９２ａ内に貫通する貫通孔９４が設けられている。 The piston portion 92 has a cylindrical shaft portion 92a that is slidably inserted into the cylinder portion 95, and has a diameter larger than that of the shaft portion 92a that is formed integrally with the shaft portion 92a at the other end of the shaft portion 92a. It consists of a large stopper portion 92b. The shaft portion 92a at a position where the shaft portion 92a and the stopper portion 92b are connected is provided with a through hole 94 that penetrates from the peripheral side surface into the shaft portion 92a.

図６(c)に、ストッパ部９２ｂを軸線方向から見た状態を示す。ストッパ部９２ｂの切削油流入側の外面には４方向に切削油の流路９２ｃが設けられ、流路９２ｃの端部に開弁時に切削油を通流させやすくする切欠９３に形成されている。なお、閉弁時にストッパ部９２ｂがシリンダ部９５の端面に当接してシリンダ部９５の端面を閉止できるよう切欠９３の切り込み深さが設定される。 FIG. 6C shows a state in which the stopper portion 92b is viewed from the axial direction. Cutting oil flow paths 92c are provided in four directions on the outer surface of the stopper section 92b on the cutting oil inflow side, and are formed in notches 93 at the ends of the flow paths 92c to facilitate the flow of the cutting oil when the valve is opened. . It should be noted that the depth of cut of the notch 93 is set so that the stopper portion 92b abuts against the end surface of the cylinder portion 95 when the valve is closed to close the end surface of the cylinder portion 95.

図６(a)は、主軸１０にホルダ３０が装着されていない状態での開閉バルブ部９０の構成を示す断面図である。リターンスプリング９７はピストン部９２のストッパ部９２ｂの外面とシリンダ室９１の内面との間を弾発するように設けられ、リターンスプリング９７の付勢力によりストッパ部９２ｂがシリンダ部９５の端面に当接してシリンダ部９５の端面を閉止するとともに、軸部９２ａがシリンダ部９５内に収容され貫通孔９４が閉止されている。ピストン部９２はストッパ部９２ｂがシリンダ部９５に当接した状態で主軸１０の端面から一端が突出する。
すなわち、図６(a)に示す状態は、開閉バルブ部９０の作用により切削油の通流が阻止され、開閉バルブ部９０が閉弁された状態を示す。 FIG. 6A is a cross-sectional view showing a configuration of the opening / closing valve unit 90 in a state where the holder 30 is not attached to the main shaft 10. The return spring 97 is provided so as to spring between the outer surface of the stopper portion 92 b of the piston portion 92 and the inner surface of the cylinder chamber 91. The urging force of the return spring 97 causes the stopper portion 92 b to abut against the end surface of the cylinder portion 95. While closing the end surface of the cylinder part 95, the axial part 92a is accommodated in the cylinder part 95, and the through-hole 94 is closed. One end of the piston portion 92 protrudes from the end surface of the main shaft 10 with the stopper portion 92 b in contact with the cylinder portion 95.
That is, the state shown in FIG. 6A shows a state in which the flow of the cutting oil is blocked by the action of the opening / closing valve unit 90 and the opening / closing valve unit 90 is closed.

図６(b)は、主軸１０のホルダ装着部１１０にホルダ３０を装着した状態を示す。ホルダ３０には主軸１０の一端面に対向する対向部３０ａが設けられ、対向部３０ａにはミキシング部側へ切削油を供給するための流路３８に連通する流路３８ａが設けられている。開閉バルブ部９０のピストン部９２は、ホルダ３０を主軸１０に装着する際の押圧力により、リターンスプリング９７の弾発力に抗してシリンダ室９１の内方に押し込まれる。これにより、軸部９２ａに設けられた貫通孔９４がシリンダ部９５によって閉止されていた位置からシリンダ部９５の外方の貫通孔９４が露出する位置に移動し、軸部９２ａの内部と軸部９２ａの外周面とが貫通孔９４を介して連通し、切削油が流路１６ｃ、シリンダ室９１、ストッパ部９２ｂの切欠９３および貫通孔９４を経由して軸部９２ａ内に流入し、ホルダ３０側に設けられた流路３８ａ、３８に供給される。
すなわち、主軸１０のホルダ装着部１１０にホルダ３０を装着することにより、主軸１０に設けられた切削油供給路とホルダ３０に設けられた切削油流路とが開閉バルブ部９０を介して連通し、開閉バルブ部９０が開弁された状態になる。 FIG. 6B shows a state where the holder 30 is mounted on the holder mounting portion 110 of the main shaft 10. The holder 30 is provided with a facing portion 30a that faces one end surface of the main shaft 10, and the facing portion 30a is provided with a flow path 38a that communicates with a flow path 38 for supplying cutting oil to the mixing portion side. The piston portion 92 of the on-off valve portion 90 is pushed into the cylinder chamber 91 against the elastic force of the return spring 97 by the pressing force when the holder 30 is mounted on the main shaft 10. As a result, the through hole 94 provided in the shaft portion 92a is moved from the position where the through hole 94 is closed by the cylinder portion 95 to a position where the through hole 94 outside the cylinder portion 95 is exposed, and the inside of the shaft portion 92a and the shaft portion are moved. The outer peripheral surface of 92a is communicated with through the through hole 94, and the cutting oil flows into the shaft portion 92a through the flow path 16c, the cylinder chamber 91, the notch 93 of the stopper portion 92b and the through hole 94, and the holder 30 It is supplied to the flow paths 38a, 38 provided on the side.
That is, by attaching the holder 30 to the holder mounting portion 110 of the main shaft 10, the cutting oil supply path provided in the main shaft 10 and the cutting oil flow path provided in the holder 30 communicate with each other via the on-off valve portion 90. Then, the open / close valve portion 90 is opened.

なお、図６(b)に示すように、主軸１０にホルダ３０を装着した際には、ピストン部９２の軸部９２ａの端面がホルダ３０の対向部３０ａの端面に当接し、主軸１０側の切削油供給路とホルダ３０側の切削油流路とが連通する。したがって、軸部９２ａの内径を流路３８ａの内径よりも少なくとも径大に設けておくと好適である。
また、ホルダ３０をホルダ装着部１１０に装着する際には、開閉バルブ部９０とホルダ３０の対向部３０ａに設けられている流路３８ａとを位置合わせして装着する必要がある。この場合は、たとえばホルダ３０の対向部３０ａが当接する主軸１０の一端面に、対向部３０ａと係合部を設け、ホルダ３０を装着する際に係合部を位置合わせすることによりホルダ３０の周方向位置を規定することができる。 As shown in FIG. 6B, when the holder 30 is mounted on the main shaft 10, the end surface of the shaft portion 92a of the piston portion 92 abuts on the end surface of the facing portion 30a of the holder 30, and the main shaft 10 side. The cutting oil supply passage and the cutting oil passage on the holder 30 side communicate with each other. Accordingly, it is preferable that the inner diameter of the shaft portion 92a is at least larger than the inner diameter of the flow path 38a.
Further, when the holder 30 is mounted on the holder mounting portion 110, it is necessary to align and mount the opening / closing valve portion 90 and the flow path 38a provided in the facing portion 30a of the holder 30. In this case, for example, the opposing portion 30a and the engaging portion are provided on one end surface of the main shaft 10 with which the opposing portion 30a of the holder 30 abuts, and when the holder 30 is mounted, the engaging portion is positioned to align the holder 30. A circumferential position can be defined.

また、ピストン部９２に形成されたストッパ部９２ｂの外面形状をたとえば球面等の曲面状に形成して、ストッパ部９２ｂの外面に沿って切削油を流れやすくすることも可能である。また、ストッパ部９２ｂの周縁とシリンダ室９１の内周面との間に切削油の通流空間を設けて、ストッパ部９２ｂの周縁部に切欠９３を設けずに切削油を通流させるようにすることも可能である。 Further, the outer surface shape of the stopper portion 92b formed on the piston portion 92 may be formed into a curved surface such as a spherical surface so that the cutting oil can easily flow along the outer surface of the stopper portion 92b. Further, a flow space for cutting oil is provided between the peripheral edge of the stopper portion 92b and the inner peripheral surface of the cylinder chamber 91, and the cutting oil is allowed to flow without providing the notch 93 at the peripheral edge portion of the stopper portion 92b. It is also possible to do.

本実施形態の開閉バルブ部９０は、主軸１０にホルダ３０を装着した際に、リターンスプリング９７の付勢力によって軸部９２ａの端面が対向部３０ａの端面を常時弾性的に押圧するから、ホルダ３０の対向部３０ａと主軸１０の端面との間隔が変動したような場合でも、ホルダ３０の対向部３０ａとピストン部９２との当接部で切削油が漏出することを防止することができる。ピストン部９２の軸部９２ａの押圧端面にシール性、緩衝性を備えた部材を取り付けることにより、軸部９２ａと対向部３０ａとの当接部での切削油の漏出をさらに確実に防止することができる。 When the holder 30 is mounted on the main shaft 10, the opening / closing valve portion 90 of the present embodiment always presses the end surface of the facing portion 30 a elastically with the end surface of the shaft portion 92 a by the biasing force of the return spring 97. Even when the distance between the opposing portion 30a of the main shaft 10 and the end face of the main shaft 10 varies, it is possible to prevent the cutting oil from leaking at the contact portion between the opposing portion 30a of the holder 30 and the piston portion 92. By attaching a member having sealing properties and buffering properties to the pressing end surface of the shaft portion 92a of the piston portion 92, it is possible to more reliably prevent the leakage of the cutting oil at the contact portion between the shaft portion 92a and the facing portion 30a. Can do.

図６(b)に示した主軸１０にホルダ３０を装着した状態から、ホルダ３０を取り外すと、リターンスプリング９７の作用により、ピストン部９２が直ちにシリンダ部９５に収容される位置に移動し、開閉バルブ部９０が閉止状態になって主軸１０からホルダ３０への切削油の供給が停止される。すなわち、ホルダ３０を主軸１０のホルダ装着部１１０から取り外す操作のみで主軸１０からホルダ３０へ切削油を供給する流路が遮断される。
このように、本実施形態の開閉バルブ部９０の構成によれば、主軸１０にホルダ３０を着脱する操作とともに、主軸１０側の切削油供給路とホルダ３０側の切削油流路とが連通する状態と、遮断される状態に自動的に切り換わり、切削油の供給操作を容易に行うことが可能になる。 When the holder 30 is removed from the state in which the holder 30 is mounted on the main shaft 10 shown in FIG. 6B, the piston 92 is immediately moved to a position where it is accommodated in the cylinder 95 by the action of the return spring 97, and is opened and closed. The valve portion 90 is closed, and the supply of cutting oil from the main shaft 10 to the holder 30 is stopped. That is, the flow path for supplying the cutting oil from the spindle 10 to the holder 30 is blocked only by removing the holder 30 from the holder mounting portion 110 of the spindle 10.
As described above, according to the configuration of the opening / closing valve portion 90 of the present embodiment, the cutting oil supply path on the main spindle 10 side and the cutting oil flow path on the holder 30 side communicate with each other while the holder 30 is attached to and detached from the main spindle 10. It is automatically switched between the state and the blocked state, and the cutting oil supply operation can be easily performed.

〔加工装置の作用〕
次に、上述した加工装置１の作用について図２と図３にしたがって説明する。図２は、主軸１０のホルダ装着部１１０にホルダ３０が装着され、工業エア供給部２００から主軸１０に設けられたエア供給路であるエア流路２５に工業エアが供給されていない状態でミスト生成部３００の非作動状態を示す。
本実施形態の加工装置１では、ホルダ３０を主軸１０のホルダ装着部１１０に装着する際に、工業エア供給部２００から工業エアをエア流路２５に供給し、エア流路２５からホルダ装着部１１０に工業エアを噴出させ、ホルダ装着部１１０の内面に切りくず等の異物が付着していた場合にはこれらの異物を除去してからホルダ３０を装着することができる。 [Operation of processing equipment]
Next, the operation of the above-described processing apparatus 1 will be described with reference to FIGS. FIG. 2 shows the mist in a state where the holder 30 is mounted on the holder mounting portion 110 of the main shaft 10 and industrial air is not supplied from the industrial air supply portion 200 to the air flow path 25 that is an air supply path provided in the main shaft 10. The non-operation state of the production | generation part 300 is shown.
In the processing apparatus 1 of the present embodiment, when the holder 30 is mounted on the holder mounting portion 110 of the main shaft 10, industrial air is supplied from the industrial air supply unit 200 to the air flow path 25, and the holder mounting section is supplied from the air flow path 25. When industrial air is ejected to 110 and foreign matter such as chips adheres to the inner surface of the holder mounting portion 110, the holder 30 can be mounted after removing these foreign matter.

ホルダ３０をホルダ装着部１１０に押し込むようにすることにより、嵌合部３３の外面が嵌合凹部１１の内面に当接するとともに、係合突起部３４が係合凹部１２に係合し、球状部３４ａの径大部が係合ボール１５を超えて係合凹部１２に嵌入することにより、ホルダ３０が抜け止めされた状態でホルダ装着部１１０に装着される。 By pushing the holder 30 into the holder mounting portion 110, the outer surface of the fitting portion 33 comes into contact with the inner surface of the fitting concave portion 11, and the engaging projection portion 34 engages with the engaging concave portion 12, and the spherical portion. When the large diameter portion of 34 a exceeds the engagement ball 15 and is fitted into the engagement recess 12, the holder 30 is mounted on the holder mounting portion 110 while being prevented from coming off.

ホルダ３０がホルダ装着部１１０に装着された状態で、嵌合部３３の外面、嵌合凹部１１の内面、内部ブロック１４によって囲まれた連通空間４０内で連絡孔３６の開口部が開口する。すなわち、嵌合部３３は他端側が徐々に縮径して形成されている一方、嵌合凹部１１の内周面は円錐状面１１ａの中途から他端側にかけて円筒状面に形成されることにより、拡径部３５ｂの周囲に連通空間４０が形成される。エア流路２５の嵌合凹部１１の内面における開口部２５ｄは連通空間４０に連通する位置で開口し、ホルダ３０を主軸１０に装着することによって、エア流路２５と突起ピース３５の内部とが、連通空間４０および連絡孔３６を介してエア流路２５と連通する。 In a state where the holder 30 is mounted on the holder mounting portion 110, the opening portion of the communication hole 36 opens in the communication space 40 surrounded by the outer surface of the fitting portion 33, the inner surface of the fitting recess 11, and the inner block 14. That is, the fitting portion 33 is formed such that the other end side is gradually reduced in diameter, while the inner peripheral surface of the fitting recess 11 is formed in a cylindrical surface from the middle of the conical surface 11a to the other end side. Thus, a communication space 40 is formed around the enlarged diameter portion 35b. The opening 25d in the inner surface of the fitting recess 11 of the air flow path 25 opens at a position communicating with the communication space 40, and the air flow path 25 and the inside of the protruding piece 35 are connected by attaching the holder 30 to the main shaft 10. The air passage 25 communicates with the air passage 25 through the communication space 40 and the communication hole 36.

図２に示すように、工業エア供給部２００からエア流路２５に工業エアが供給されていない状態においては、ホルダ３０内に設けられた工業エア弁部２５０を構成するピストン５２には工業エアの供給圧力が作用せず、ピストン５２はスプリング５５の付勢力によって弁体５２ａが弁座５４に当接した位置、すなわち閉弁位置にある。 As shown in FIG. 2, in a state in which industrial air is not supplied from the industrial air supply unit 200 to the air flow path 25, the industrial air valve unit 250 provided in the holder 30 has an industrial air in the piston 52. The piston 52 is in a position where the valve body 52a abuts on the valve seat 54 by the urging force of the spring 55, that is, in the valve closing position.

一方、切削油は切削油供給部１４０から主軸１０内に設けられた切削油供給路である流路１６ｃ等を経由して開閉バルブ部９０のシリンダ室９１に供給され、ホルダ３０が主軸１０に装着されることにより、対向部３０ａがピストン部９２の一端に当接し、ピストン部９２が押動されて開弁する開閉バルブ部９０を経由してホルダ３０に設けられた流路３８に供給される。
流路３８に供給された切削油は流路３８に連通する流路５９ａに流入するが、ピストン５２が閉弁位置にあることにより、流路５９ａと切削油連通溝５７とは連通せず、シリンダ５３の内面で開口する流路５９ａの流入口がピストン５２によって閉止された状態、すなわち切削油弁部２５５は閉弁状態にあり、ミキシング部２７０に切削油が供給されず、オイルミストは生成されない。 On the other hand, the cutting oil is supplied from the cutting oil supply unit 140 to the cylinder chamber 91 of the opening / closing valve unit 90 via the flow path 16 c that is a cutting oil supply path provided in the main shaft 10, and the holder 30 is attached to the main shaft 10. By mounting, the facing portion 30a comes into contact with one end of the piston portion 92, and is supplied to the flow path 38 provided in the holder 30 via the opening / closing valve portion 90 that is opened when the piston portion 92 is pushed. The
The cutting oil supplied to the flow path 38 flows into the flow path 59a communicating with the flow path 38. However, the piston 52 is in the valve closing position, so that the flow path 59a and the cutting oil communication groove 57 do not communicate with each other. A state where the inlet of the flow path 59a opened on the inner surface of the cylinder 53 is closed by the piston 52, that is, the cutting oil valve portion 255 is in a closed state, the cutting oil is not supplied to the mixing portion 270, and oil mist is generated. Not.

図３は、工業エア供給部２００から主軸１０に設けられたエア流路２５に工業エアが供給されたミスト生成部３００の作動状態を示す。
エア流路２５に供給された工業エアは、開口部２５ｄから連通空間４０に送入され、連絡孔３６からホルダ３０の貫通孔３１に供給される。工業エア弁部２５０を構成するピストン５２は、貫通孔３１に供給された工業エアの供給圧力によりスプリング５５の付勢力に抗して、一端面が第２のピース６０の他端面に当接する位置に押動される。すなわち、ピストン５２の弁体５２ａは弁座５４から離間し、シリンダ５３の開口部５４ａが開口して工業エア弁部２５０が開弁状態となる。 FIG. 3 shows an operating state of the mist generating unit 300 in which industrial air is supplied from the industrial air supply unit 200 to the air flow path 25 provided in the main shaft 10.
The industrial air supplied to the air flow path 25 is fed into the communication space 40 from the opening 25 d and supplied to the through hole 31 of the holder 30 through the communication hole 36. The piston 52 that constitutes the industrial air valve portion 250 is located at one end surface that abuts against the other end surface of the second piece 60 against the biasing force of the spring 55 by the supply pressure of the industrial air supplied to the through hole 31. Is pushed. That is, the valve body 52a of the piston 52 is separated from the valve seat 54, the opening 54a of the cylinder 53 is opened, and the industrial air valve 250 is opened.

ピストン５２が開弁位置に移動すると、シリンダ５３は開口部５４ａを介して工業エアの供給路と連通し、若干拡径して形成されたシリンダ５３の内周面とピストン５２の外周面との隙間部分を経由して導入口５６からピストン５２の内側に工業エアが送入され、連絡流路６２ａ、流路５８、連絡流路６２ｂを介して空隙部８２に工業エアが供給される。空隙部８２には、図５に示すように連絡流路６２ｂが開口する３個所の開口部から工業エアが送入され、工業エア吐出部７３からノズル部６４の外周に沿って工業エアが吐出される。 When the piston 52 moves to the valve open position, the cylinder 53 communicates with the industrial air supply path through the opening 54 a, and the inner peripheral surface of the cylinder 53 formed with a slightly larger diameter and the outer peripheral surface of the piston 52 are formed. Industrial air is fed into the piston 52 from the introduction port 56 via the gap, and the industrial air is supplied to the gap 82 via the communication channel 62a, the channel 58, and the communication channel 62b. As shown in FIG. 5, industrial air is fed into the gap 82 from three openings where the communication flow path 62 b opens, and industrial air is discharged from the industrial air discharge part 73 along the outer periphery of the nozzle part 64. Is done.

一方、ピストン５２が開弁位置に移動することにより、ピストン５２の外周面に設けられた切削油連通溝５７が流路５９ａ、５９ｂのシリンダ５３の内面における流入口、流出口に位置合わせされ、切削油連通溝５７を介して流路５９ａと流路５９ｂとが連通する。すなわち、切削油弁部２５５が開弁状態になり、ホルダ３０内に設けられた切削油流路である流路３８、５９ａ、５９ｂ、５９ｃ、６４ｂ、６４ａが連通し、主軸１０に設けられた切削油供給路１６ｃから供給される切削油が開弁状態にある開閉バルブ部９０および、ホルダ３０内の切削油流路を経由してノズル部６４に導かれる。 On the other hand, when the piston 52 moves to the valve opening position, the cutting oil communication groove 57 provided on the outer peripheral surface of the piston 52 is aligned with the inlet and outlet on the inner surface of the cylinder 53 of the flow paths 59a and 59b. The flow path 59a and the flow path 59b communicate with each other through the cutting oil communication groove 57. That is, the cutting oil valve portion 255 is opened, and the flow paths 38, 59 a, 59 b, 59 c, 64 b, 64 a that are cutting oil flow paths provided in the holder 30 communicate with each other and are provided on the main shaft 10. The cutting oil supplied from the cutting oil supply passage 16 c is guided to the nozzle portion 64 via the open / close valve portion 90 in the valve open state and the cutting oil passage in the holder 30.

ノズル部６４に導かれた切削油はノズル部６４の先端からノズル挿入孔７２に吐出されるとともに、工業エア吐出部７３からノズル部６４の外面に沿って高速で工業エアが吐出することにより、切削油と工業エアとが霧状に混合したオイルミストが生成され、噴射孔７５からホルダ３０に装着される工具に向けてオイルミストが噴射される。噴射孔７５から噴射されたオイルミストは開口部７４により拡散されて工具に供給される。
こうして、本実施形態の加工装置１では、ホルダ３０内に設けられたミキシング部２７０で工業エアと切削油とが霧状に混合したオイルミストが生成され、ホルダ３０に装着された工具にオイルミストが供給されてセミドライ加工がなされる。 The cutting oil guided to the nozzle part 64 is discharged from the tip of the nozzle part 64 to the nozzle insertion hole 72, and industrial air is discharged from the industrial air discharge part 73 along the outer surface of the nozzle part 64 at a high speed. An oil mist in which cutting oil and industrial air are mixed in a mist form is generated, and the oil mist is injected from the injection hole 75 toward the tool mounted on the holder 30. The oil mist injected from the injection hole 75 is diffused through the opening 74 and supplied to the tool.
Thus, in the processing apparatus 1 of the present embodiment, the oil mist in which the industrial air and the cutting oil are mixed in a mist form is generated by the mixing unit 270 provided in the holder 30, and the oil mist is applied to the tool attached to the holder 30. Is supplied and semi-dry processing is performed.

本実施形態の工業エア弁部２５０を備える切削油供給制御バルブ機構２６０は主軸１０に設けられたエア供給路から供給される工業エアの供給圧力によりピストン５２が開弁するとともにミキシング部２７０へ切削油を導く切削油流路を連通するように作用し、ミスト生成部３００は工業エアの供給圧力により工業エア弁部２５０が開弁し、ミキシング部２７０への切削油の供給路が開弁してオイルミストが生成される。 The cutting oil supply control valve mechanism 260 including the industrial air valve part 250 of the present embodiment opens the piston 52 and cuts into the mixing part 270 by the supply pressure of the industrial air supplied from the air supply path provided in the main shaft 10. The mist generating unit 300 opens the industrial air valve unit 250 by the supply pressure of the industrial air, and the cutting oil supply path to the mixing unit 270 is opened. Oil mist is generated.

また、本実施形態の加工装置１においては、第１のピース５０、第２のピース６０、第３のピース７０およびスペーサ８０を、加工装置１の加工内容や使用する工具に応じて適宜交換して使用することができる。たとえば、第３のピース７０を開口部７４の形状が異なるものと交換することによって、オイルミストの噴射状態を調節することができ、また、ノズル挿入孔７２の内径や深さが異なる第３のピース７０に交換することによってオイルミストの粒の大きさ等のオイルミストの性状を変えることができる。 Moreover, in the processing apparatus 1 of this embodiment, the 1st piece 50, the 2nd piece 60, the 3rd piece 70, and the spacer 80 are replaced | exchanged suitably according to the processing content of the processing apparatus 1, and the tool to be used. Can be used. For example, by replacing the third piece 70 with one having a different shape of the opening 74, the injection state of the oil mist can be adjusted, and the inner diameter and depth of the nozzle insertion hole 72 are different. By changing to the piece 70, the properties of the oil mist, such as the size of the oil mist particles, can be changed.

すなわち、工具に供給するオイルミストの粒の大きさやオイルミストの噴射状態は、ノズル部６４の先端とノズル挿入孔７２の内端面との間隔（図２に示す間隔Ｌ）を変えることによって調節することが可能である。間隔Ｌを小さくすれば、オイルミストの粒は細かくなり、オイルミストは広がった状態で噴射され、間隔Ｌを大きくすれば、オイルミストの粒は大きくなり、オイルミストは直線状に集束されて噴射されるようになる。間隔Ｌを調節する方法としては、第３のピース７０をノズル挿入孔７２の深さが異なるものに交換する、第２のピース６０をノズル部６４の長さが異なるものに交換する、スペーサ８０を厚さの異なるものに交換するといった方法を利用することができる。 That is, the size of the oil mist particles supplied to the tool and the spray state of the oil mist are adjusted by changing the distance between the tip of the nozzle portion 64 and the inner end face of the nozzle insertion hole 72 (interval L shown in FIG. 2). It is possible. If the interval L is made smaller, the oil mist particles become finer and the oil mist is injected in a spread state. If the interval L is made larger, the oil mist particles become larger and the oil mist is converged in a straight line and injected. Will come to be. As a method for adjusting the interval L, the third piece 70 is replaced with one having a different depth of the nozzle insertion hole 72, and the second piece 60 is replaced with one having a different length of the nozzle portion 64, the spacer 80. It is possible to use a method of exchanging for a different thickness.

本実施形態の加工装置１では、工具が取り付けられる位置に近いホルダ３０内で工業エアと切削油とが混合されてオイルミストが生成されるから、流路内でオイルミストを輸送する際にオイルミストが分離したりすることがなく、工具の加工位置にまで的確にオイルミストを供給することができる。また、オイルミストを生成するミスト生成部３００をホルダ３０の内部に設けたことによって装置構成をコンパクトにすることができ、加工装置と別にオイルミストの生成装置を用意する必要がなく、セミドライ加工を可能にする加工装置の全体構成を簡素化することができる。 In the processing apparatus 1 of the present embodiment, since industrial air and cutting oil are mixed in the holder 30 close to the position where the tool is attached, oil mist is generated, so oil is transported when the oil mist is transported in the flow path. Oil mist can be accurately supplied to the machining position of the tool without separating the mist. In addition, the apparatus configuration can be made compact by providing the mist generating unit 300 for generating oil mist inside the holder 30, so that it is not necessary to prepare an oil mist generating apparatus separately from the processing apparatus, and semi-dry processing can be performed. It is possible to simplify the overall configuration of the processing apparatus that can be realized.

また本実施形態の加工装置では、主軸１０の一端部に開閉バルブ部９０を設け、ホルダ３０を主軸１０のホルダ装着部に装着する操作のみで、主軸１０に設けられた切削油供給流路とホルダ３０に設けられた切削油流路とが連通し、主軸１０からホルダ３０を取り外した際には開閉バルブ部９０の作用により主軸１０に設けられた切削油供給流路が遮断され、切削油供給流路から切削油が漏出することが防止される。このように、本実施形態の加工装置によれば、ホルダ３０を主軸１０のホルダ装着部に着脱する操作に連動して自動的に切削油の供給流路の連通と遮断がなされ、これによって、セミドライ加工を可能にする操作性のよい加工装置として提供される。 In the processing apparatus of the present embodiment, the opening / closing valve portion 90 is provided at one end portion of the main shaft 10, and the cutting oil supply flow path provided in the main shaft 10 can be obtained only by mounting the holder 30 on the holder mounting portion of the main shaft 10. When the holder 30 is removed from the main shaft 10, the cutting oil supply channel provided in the main shaft 10 is blocked by the action of the opening / closing valve unit 90, and the cutting oil flow path provided in the holder 30 is disconnected. The cutting oil is prevented from leaking from the supply channel. As described above, according to the processing apparatus of the present embodiment, the cutting oil supply passage is automatically connected and disconnected in conjunction with the operation of attaching and detaching the holder 30 to and from the holder mounting portion of the main spindle 10, Provided as a processing device with good operability that enables semi-dry processing.

本発明に係る加工装置の実施形態の構成を示す組み立て断面図である。It is assembly sectional drawing which shows the structure of embodiment of the processing apparatus which concerns on this invention. 実施形態の加工装置のホルダの構成（閉弁時）を示す断面図である。It is sectional drawing which shows the structure (at the time of valve closing) of the holder of the processing apparatus of embodiment. 実施形態の加工装置のホルダの構成（開弁時）を示す断面図である。It is sectional drawing which shows the structure (at the time of valve opening) of the holder of the processing apparatus of embodiment. ミスト生成部の構成を示す断面図である。It is sectional drawing which shows the structure of a mist production | generation part. 第１のピースのエア流路の配置を軸線方向から見た状態を示す説明図である。It is explanatory drawing which shows the state which looked at the arrangement | positioning of the air flow path of a 1st piece from the axial direction. 加工装置の開閉バルブ部の構成を示す断面図(a)、(b)、およびピストン部のストッパ部の正面図(c)である。It is sectional drawing (a) which shows the structure of the on-off valve part of a processing apparatus, (b), and the front view (c) of the stopper part of a piston part.

Explanation of symbols

１０主軸
１１嵌合凹部
１２係合凹部
１６内挿管
１６ａ、１６ｂ、１６ｃ流路
２４ロータリーシール
２５エア流路
３０ホルダ
３０対向部
３０ａ対向部
３２コレット
３３嵌合部
３４係合突起部
３５突起ピース
３８、３８ａ、５９ａ、５９ｂ、５９ｃ流路
４０連通空間
５０第１のピース
５２ピストン
５２ａ弁体
５５スプリング
５７切削油連通溝
６０第２のピース
６４ノズル部
７０第３のピース
７２ノズル挿入孔
７３工業エア吐出部
８０スペーサ
９０開閉バルブ部
９１シリンダ室
９２ピストン部
９２ａ軸部
９２ｂストッパ部
９２ｃ流路
９３切欠
９４貫通孔
９５シリンダ部
９７リターンスプリング
１１０ホルダ装着部
１３２工具支持部
１４０切削油供給部
２００工業エア供給部
２５０工業エア弁部
２５５切削油弁部
２６０切削油供給制御バルブ機構
２７０ミキシング部
３００ミスト生成部 DESCRIPTION OF SYMBOLS 10 Main axis 11 Fitting recessed part 12 Engaging recessed part 16 Inner tube 16a, 16b, 16c Flow path 24 Rotary seal 25 Air flow path 30 Holder 30 Opposing part 30a Opposing part 32 Collet 33 Fitting part 34 Engaging protrusion part 35 Protruding piece 38 , 38a, 59a, 59b, 59c Flow path 40 Communication space 50 First piece 52 Piston 52a Valve body 55 Spring 57 Cutting oil communication groove 60 Second piece 64 Nozzle part 70 Third piece 72 Nozzle insertion hole 73 Industrial air Discharge part 80 Spacer 90 Open / close valve part 91 Cylinder chamber 92 Piston part 92a Shaft part 92b Stopper part 92c Flow path 93 Notch 94 Through hole 95 Cylinder part 97 Return spring 110 Holder mounting part 132 Tool support part 140 Cutting oil supply part 200 Industrial air Supply section 250 The valve unit 255 cutting oil valve unit 260 cutting oil feed control valve mechanism 270 mixing unit 300 mist generating unit

Claims

A processing apparatus comprising a holder for supporting a tool, a main shaft having a holder mounting portion on which the holder is detachably mounted, and a drive mechanism for rotationally driving the main shaft,
The spindle, possess a cutting oil supply path for supplying cutting oil to said holder mounted on the holder mounting portion, and a closing means for the opening of the cutting oil supply passage to open and close with the attachment and detachment of the holder ,
The opening / closing means includes
A piston portion having a through hole that opens at one end of the shaft portion and communicates with the outer peripheral surface;
The piston part is slidable, and a cylinder part that projects and accommodates the one end of the piston part toward a holder attached to the holder attaching part;
A biasing portion that biases the piston portion in a direction in which the piston portion is accommodated in the cylinder portion;
The processing device according to claim 1, wherein the opening / closing means opens when the holder mounted on the holder mounting portion and the one end abut against each other.

The holder includes a tool support portion that supports the tool, a facing portion that faces the main shaft when mounted on the holder mounting portion, and a cutting oil passage that communicates from the facing portion into the holder. And
2. The processing apparatus according to claim 1, wherein the opening / closing means is provided on a surface facing the holder mounted on the holder mounting portion, and makes the cutting oil supply path communicate with the cutting oil flow path. .

The main shaft has an air supply path for supplying industrial air to a holder mounted on the holder mounting portion,
The holder includes a mist generator that generates oil mist by mixing the industrial air supplied by the air supply passage and the cutting oil supplied by the cutting oil supply passage in a mist form,
The processing apparatus according to claim 1 or 2, wherein semi-dry processing is performed using the oil mist generated by the mist generation unit .

The holder has a cutting oil supply control valve mechanism that is operated by industrial air supplied by the air supply path and controls the supply of cutting oil guided by the cutting oil flow path to the mist generating unit. The processing apparatus according to claim 3 .

A processing apparatus comprising a holder for supporting a tool, a main shaft having a holder mounting portion on which the holder is detachably mounted, and a drive mechanism for rotationally driving the main shaft,
The main shaft includes a cutting oil supply path for supplying cutting oil to the holder mounted on the holder mounting section, an opening / closing means for opening and closing an opening of the cutting oil supply path with attachment / detachment of the holder, and the holder An air supply path for supplying industrial air to the holder mounted on the mounting portion;
The holder includes an industrial air supplied by the air supply path and a cutting oil supplied by the cutting oil supply path in a mist to generate an oil mist, and an air supply path. An oil mist generated by the mist generating unit, which includes a cutting oil supply control valve mechanism that is operated by the supplied industrial air and controls the supply of the cutting oil guided by the cutting oil flow path to the mist generating unit. Processing equipment characterized by semi-dry processing using

The holder includes a tool support portion that supports the tool, a facing portion that faces the main shaft when mounted on the holder mounting portion, and a cutting oil passage that communicates from the facing portion into the holder. And
6. The processing apparatus according to claim 5, wherein the opening / closing means is provided on a surface facing the holder mounted on the holder mounting portion, and causes the cutting oil supply path and the cutting oil path to communicate with each other. .

The opening / closing means includes
A piston portion having a through hole that opens at one end of the shaft portion and communicates with the outer peripheral surface;
The piston part is slidable, and a cylinder part that projects and accommodates the one end of the piston part toward a holder attached to the holder attaching part;
A biasing portion that biases the piston portion in a direction in which the piston portion is accommodated in the cylinder portion;
The processing device according to claim 5, wherein the opening / closing means opens when the holder mounted on the holder mounting portion and the one end abut against each other.