JPH0226566Y2 - - Google Patents
Info
- Publication number
- JPH0226566Y2 JPH0226566Y2 JP1986140691U JP14069186U JPH0226566Y2 JP H0226566 Y2 JPH0226566 Y2 JP H0226566Y2 JP 1986140691 U JP1986140691 U JP 1986140691U JP 14069186 U JP14069186 U JP 14069186U JP H0226566 Y2 JPH0226566 Y2 JP H0226566Y2
- Authority
- JP
- Japan
- Prior art keywords
- workpiece
- lathe
- hydrostatic bearing
- main shaft
- assembly
- 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
Links
- 230000002706 hydrostatic effect Effects 0.000 claims description 43
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 4
- 238000003754 machining Methods 0.000 description 8
- 238000007514 turning Methods 0.000 description 8
- 230000003068 static effect Effects 0.000 description 6
- 239000002184 metal Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000012467 final product Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
Landscapes
- Gripping On Spindles (AREA)
- Turning (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
この考案は、旋盤における工作物保持機構に関
する。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a workpiece holding mechanism in a lathe.
通常、旋盤による旋削加工においては、旋盤の
回転主軸にチヤツクを装着し、該チヤツクに工作
物を保持し、工作物を主軸と共に回転させて旋削
加工を行つている。従つて、工作物の形状はチヤ
ツクに保持され得ることが条件となり、結果とし
て、一つの組立体を作る場合、その各パーツごと
に旋盤を保持して旋削加工を行い、旋削加工の終
了後に各パーツを順次に組合わせて一つの組立体
を作つているのが現状である。
Normally, in turning processing using a lathe, a chuck is attached to the rotating main shaft of the lathe, a workpiece is held on the chuck, and the turning processing is performed by rotating the workpiece together with the main shaft. Therefore, it is a condition that the shape of the workpiece can be held in the chuck, and as a result, when making one assembly, the lathe is held and turned for each part, and after the turning process is completed, each part is turned. Currently, parts are assembled sequentially to form an assembly.
近年、コンピユータ関連機器、OA機器に使用
される部品については、小型且つ高精度が要求さ
れている。しかしながら、それらの部品の作製、
組立てにあたり、部品の各パーツを個々に機械加
工即ち旋削加工を行い、しかる後に、組立ててい
るために、各パーツごとの加工精度を、たとえサ
ブミクロンのレベルで加工したとしても、各パー
ツの組立てにより、その加工誤差は累積誤差とな
つて現れるために、最終製品として部品を組立て
た際に、許容誤差を超えるものが生じることがし
ばしば見られた。このような不具合を防ぐ対策と
して各パーツを組合わせた状態（最終製品の状
態）で最終の仕上加工を行い、加工精度を高める
ことが考えられるが、そのためには、組合わせた
状態での形状が旋盤等の工作機械にチヤツキング
可能な形状であることが条件と成り、設計の自由
度が制限を受けることとなる。 この考案の目的
は、上記の課題を解消することであり、各パーツ
を組立てた状態の工作物即ち工作物組立体の一部
即ちスピンドルの外径を静圧軸受部に構成し、上
記工作物組立体を旋盤上に静圧軸受機構で上記静
圧軸受部を直接的に保持することを可能にし、そ
れによつて各パーツの組立て後の上記工作物組立
体の形状に大きな自由度を持たせ、更に最終製品
としての上記工作物組立体の加工精度を高めるこ
とができる旋盤における工作物保持機構を提供す
ることである。
In recent years, parts used in computer-related equipment and OA equipment are required to be small and highly accurate. However, the fabrication of those parts,
During assembly, each part is individually machined or turned, and then assembled, so even if each part is machined to a submicron level, the assembly of each part is difficult. As a result, processing errors appear as cumulative errors, and it has often been seen that errors exceeding tolerances occur when parts are assembled as final products. As a countermeasure to prevent such defects, it is possible to perform final finishing processing on the assembled parts (final product state) to improve processing accuracy. The shape must be such that it can be chucked by a machine tool such as a lathe, which limits the degree of freedom in design. The purpose of this invention is to solve the above-mentioned problems, and the workpiece in which each part is assembled, that is, a part of the workpiece assembly, that is, the outer diameter of the spindle is configured as a hydrostatic bearing part, and the workpiece It is possible to directly hold the above-mentioned hydrostatic pressure bearing part on the lathe with a hydrostatic pressure bearing mechanism, thereby giving a large degree of freedom to the shape of the above-mentioned workpiece assembly after each part is assembled. Another object of the present invention is to provide a workpiece holding mechanism in a lathe that can improve the machining accuracy of the workpiece assembly as a final product.
この考案は、上記の目的を達成するために、次
のように構成されている。即ち、この考案は、旋
盤の回転主軸の軸心延長上に配置した工作物組立
体のスピンドルの外径で構成される静圧軸受部、
該静圧軸受部を回動可能に保持し且つ旋盤の固定
部に設けた支持部材に取付けた静圧軸受機構、前
記回転主軸側に設けた端部基準面、及び前記工作
物組立体を前記端部基準面と前記静圧軸受機構と
の間で前記端部基準面に押圧状態に保持する押圧
手段、を有することを特徴とする旋盤における工
作物保持機構に関する。
In order to achieve the above object, this invention is constructed as follows. That is, this invention has a hydrostatic bearing section that is formed by the outer diameter of the spindle of the workpiece assembly, which is arranged on the extension of the axis of the rotating main shaft of the lathe;
A hydrostatic bearing mechanism that rotatably holds the hydrostatic bearing part and is attached to a support member provided on a fixed part of the lathe, an end reference surface provided on the rotating main shaft side, and the workpiece assembly The present invention relates to a workpiece holding mechanism in a lathe, comprising a pressing means for holding the end reference surface in a pressed state between the end reference surface and the hydrostatic bearing mechanism.
また、この旋盤における工作物保持機構におい
て、前記工作物組立体を前記回転主軸に装着した
カツプリングに取付けたものである。 Further, in the workpiece holding mechanism of this lathe, the workpiece assembly is attached to a coupling mounted on the rotating main shaft.
また、この旋盤における工作物保持機構におい
て、前記静圧軸受機構を前記固定部から延長した
前記支持部材に着脱自在に装着し、前記静圧軸受
機構を前記回転主軸の軸心と同心上に整合した状
態に配置したものである。 Further, in the workpiece holding mechanism of this lathe, the hydrostatic bearing mechanism is removably attached to the support member extending from the fixed part, and the hydrostatic bearing mechanism is aligned concentrically with the axis of the rotating main shaft. It is placed in such a state.
この考案による旋盤における工作物保持機構
は、上記のように構成されており、次のように作
用する。即ち、この旋盤における工作物保持機構
は、静圧軸受機構を支持部材から取外した状態
で、組立体としての工作物即ち工作物組立体を前
記静圧軸受機構に装着し、しかる後に、該静圧軸
受機構を旋盤に立設した支持部材に取付ける。次
いで、前記静圧軸受機構の静圧軸受部分に押圧手
段としての圧油を送給すると、前記工作物組立体
は前記静圧軸受部分内を軸方向に摺動し、最終的
に前記工作物組立体の先端が回転主軸側の端面で
ある端部基準面に当接して位置決めが行われ、前
記工作物組立体が旋盤上に押圧状態に保持され
る。同時に、前記回転主軸に設けられたカツプリ
ングと前記工作物組立体とがピン等の固着手段に
より係合される。この状態で、前記静圧軸受機構
に対して前記工作物組立体のスピンドルの外径が
直接的に静圧軸受部に構成される。そこで、前記
回転主軸に動力が伝えられると、前記カツプリン
グ及び前記ピンを介して前記工作物に回動運動が
与えられ、前記工作物組立体の適宜の加工面が通
常の制御手段を介してバイトによつて仕上げ旋削
加工が行われる。
The workpiece holding mechanism in the lathe according to this invention is constructed as described above and operates as follows. That is, the workpiece holding mechanism in this lathe is such that a workpiece as an assembly, that is, a workpiece assembly, is mounted on the static pressure bearing mechanism with the static pressure bearing mechanism removed from the support member, and then the static pressure bearing mechanism is removed from the support member. Attach the pressure bearing mechanism to a support member installed upright on the lathe. Next, when pressure oil is supplied as a pressing means to the hydrostatic bearing portion of the hydrostatic bearing mechanism, the workpiece assembly slides in the axial direction within the hydrostatic bearing portion, and finally the workpiece The tip of the assembly is positioned by coming into contact with an end reference surface, which is an end surface on the rotating spindle side, and the workpiece assembly is held in a pressed state on the lathe. At the same time, a coupling provided on the rotating main shaft and the workpiece assembly are engaged with each other by fixing means such as a pin. In this state, the outer diameter of the spindle of the workpiece assembly is directly formed into a hydrostatic bearing portion with respect to the hydrostatic bearing mechanism. Therefore, when power is transmitted to the rotating main shaft, a rotational movement is imparted to the workpiece through the coupling and the pin, and a suitable machining surface of the workpiece assembly is controlled by a normal control means. Finish turning is performed by.
この考案による旋盤における工作物保持機構に
おいては、前記工作物の保持を通常のチヤツクに
よらずに、前記工作物組立体を摺動及び回動可能
な前記静圧軸受機構を用いて直接的に静圧軸受で
支持しているので、前記工作物の形状に相当の自
由度を持たせることが可能となり、それにより前
記工作物を組立体にまで広げることができるのに
加え、軸受面を高精度に予め加工しておくことに
より径方向の加工精度面を確実なものとすること
ができ、組立体としての最終製品の仕上げ精度を
向上させることができる。更に、前記回転主軸と
前記工作物組立体とはピン係合による動力伝達で
あるので、超仕上加工では好ましくない駆動系か
らの振動伝達を大きく減ずることが可能となり、
また、前記工作物組立体をチヤツキングする必要
がないのでチヤツクによる歪発生や損傷等が発生
することがない。 In the workpiece holding mechanism for a lathe according to this invention, the workpiece is held directly by using the hydrostatic bearing mechanism that allows the workpiece assembly to slide and rotate, without using a normal chuck. Since it is supported by hydrostatic bearings, it is possible to have a considerable degree of freedom in the shape of the workpiece, which allows the workpiece to be expanded into an assembly. Preliminary machining to high precision can ensure radial machining accuracy, and can improve the finishing accuracy of the final product as an assembly. Furthermore, since power is transmitted between the rotating main shaft and the workpiece assembly through pin engagement, it is possible to greatly reduce vibration transmission from the drive system, which is undesirable in super finishing machining.
Further, since there is no need to chuck the workpiece assembly, distortion and damage due to chuck will not occur.
以下、図面を参照して、この考案による旋盤に
おける工作物保持機構の一実施例を訟述する。
An embodiment of the workpiece holding mechanism in a lathe according to this invention will be described below with reference to the drawings.
第１図において、１は従来公知の旋盤の主軸台
ユニツトを示しており、図示していないが、適宜
の駆動手段により駆動される回転主軸２を有す
る。回転主軸２の端部には、通常の旋盤における
チヤツクに代え、軸方向押え金具３をボルト４等
の係止手段により固定する。軸方向押え金具３の
回転主軸２の軸心Ｌ−Ｌと同一延長上に位置する
箇所には突起５を形成する。該突起５の先端面に
は平滑加工を施し、各パーツが組み立てられた工
作物１００に対する軸方向端部基準面６としての
作用をなす。更に、軸方向押え金具３には、後述
するように、工作物１００の径に応じた径を有す
る円筒状カツプリング７をボルト１１等の固着手
段によつて固定する。円筒状カツプリング７の先
端部には、工作物１００と係合する１本のピン８
を立設する。更に、旋盤の主軸台ユニツト１の適
宜の固定部にはボルト９等を介して軸方向に延長
する支持部材１０を取付ける。支持部材１０は、
後述する静圧軸受機構２０を着脱自在に装着する
のであり、回転主軸２の軸心Ｌ−Ｌに沿つて回転
主軸２の端部より伸長した部位へと延長してい
る。第１図において、一例としての工作物１００
の構造が示されており、この考案による旋盤にお
ける工作物保持機構に該工作物１００を取付けた
状態が示されている。工作物１００は、円筒状ハ
ウジングＡ及び該円筒状ハウジングＡに貫入され
たスピンドルＢの各パーツから成る工作物組立体
である。 In FIG. 1, reference numeral 1 designates a headstock unit of a conventionally known lathe, which has a rotating main shaft 2 driven by a suitable driving means, although not shown. An axial presser metal fitting 3 is fixed to the end of the rotating main shaft 2 by a locking means such as a bolt 4 instead of a chuck in a normal lathe. A protrusion 5 is formed at a location of the axial presser fitting 3 located on the same extension as the axis L-L of the rotating main shaft 2. The tip surface of the protrusion 5 is smoothed and functions as an axial end reference surface 6 for the workpiece 100 in which each part is assembled. Furthermore, as will be described later, a cylindrical coupling ring 7 having a diameter corresponding to the diameter of the workpiece 100 is fixed to the axial holding member 3 by means of fixing means such as bolts 11. At the tip of the cylindrical coupling ring 7, there is one pin 8 that engages with the workpiece 100.
erected. Further, a support member 10 extending in the axial direction is attached to an appropriate fixed portion of the headstock unit 1 of the lathe via a bolt 9 or the like. The support member 10 is
A hydrostatic bearing mechanism 20, which will be described later, is detachably mounted thereon, and extends from the end of the rotating main shaft 2 along the axis L-L of the rotating main shaft 2. In FIG. 1, a workpiece 100 as an example
This figure shows the workpiece 100 attached to a workpiece holding mechanism in a lathe according to this invention. The workpiece 100 is a workpiece assembly consisting of a cylindrical housing A and a spindle B inserted into the cylindrical housing A.
次に、静圧軸受機構２０について説明する。軸
受機構２０は静圧軸受部分２１と本体部分２２と
から成り、静圧軸受部分２１には工作物１００の
適宜の箇所を回動及び摺動可能に保持するための
通孔２３が形成され、該通孔２３は本体部分２２
に形成される圧油室孔２４と連通している。本体
部分２２の後端部には、圧油室孔２４に圧油を供
給するための圧油管３０がカツプラー３１を介し
て迅速に着脱自在にできるように装着されてい
る。静圧軸受部分２１の通孔２３の内径は、該通
孔２３に装着する工作物１００の装着箇所、図示
の実施例ではスピンドルＢの外径とほぼ同一であ
る。第２図及び第３図に示すように、通孔２３の
内周面の複数箇所には軸方向に延びる溝２５を刻
設すると共に、軸方向の適宜箇所には大径部に形
成し、油溜り部２６を形成する。軸受機構２０の
本体部分２２には、フランジ２７が形成されてお
り、該フランジ２７と支持部材１０とを回転主軸
２の軸心Ｌ−Ｌと軸受機構２０の静圧軸受部分２
１の通孔２３の軸心L1−L1とが同一線上に整合
する状態でボルト２８等により着脱自在に取付け
る。なお、図中、符号Ｃは回転主軸２の回転力を
ピン８を介して工作物１００に伝動するために工
作物１００に形成されるピン受け孔即ち係合孔で
あり、及び符号Ｐ，P′は刃物台３３に固定された
バイト３２等による工作物１００の旋削加工面を
示す。 Next, the hydrostatic bearing mechanism 20 will be explained. The bearing mechanism 20 consists of a hydrostatic pressure bearing portion 21 and a main body portion 22, and the hydrostatic pressure bearing portion 21 is formed with a through hole 23 for rotatably and slidably holding an appropriate portion of the workpiece 100. The through hole 23 is connected to the main body portion 22.
It communicates with a pressure oil chamber hole 24 formed in. A pressure oil pipe 30 for supplying pressure oil to the pressure oil chamber hole 24 is attached to the rear end of the main body portion 22 via a coupler 31 so that it can be quickly attached and detached. The inside diameter of the through hole 23 of the hydrostatic bearing part 21 is approximately the same as the outside diameter of the spindle B in the illustrated embodiment, where the workpiece 100 is installed in the through hole 23. As shown in FIGS. 2 and 3, grooves 25 extending in the axial direction are formed at multiple locations on the inner circumferential surface of the through hole 23, and grooves 25 are formed at appropriate locations in the axial direction at large diameter portions. An oil reservoir 26 is formed. A flange 27 is formed on the main body portion 22 of the bearing mechanism 20, and the flange 27 and the support member 10 are aligned with the axis L-L of the rotating main shaft 2 and the hydrostatic pressure bearing portion 2 of the bearing mechanism 20.
It is removably attached with bolts 28 or the like in a state where the axes L 1 -L 1 of the through holes 23 of No. 1 are aligned on the same line. In addition, in the figure, the symbol C is a pin receiving hole, that is, the engagement hole, formed in the workpiece 100 to transmit the rotational force of the rotating main shaft 2 to the workpiece 100 via the pin 8, and the symbols P, P ' indicates the surface of the workpiece 100 that is turned by the cutting tool 32 etc. fixed to the tool post 33.
次に、この考案による旋盤における工作物保持
機構の使用態様について説明する。この旋盤にお
ける工作物保持機構に工作物１００を取付ける場
合に、まず、ボルト２８を取外して旋盤主軸台ユ
ニツト１の旋盤本体から静圧軸受機構２０を取外
す。工作物１００の適宜箇所、図示のものにおい
てはスピンドルＢの部分を、静圧軸受部として静
圧軸受機構２０における軸受部分２１の通孔２３
に挿入する。その状態で、静圧軸受機構２０を工
作物１００と共に、支持部材１０にボルト２８を
用いて固定する。次いで、静圧軸受機構２０の本
体部分２２にカツプラー３１を介して油圧管３０
を取付け、油圧手段（図示省略）を介して圧油室
孔２４内に圧油を送給する。その油圧により、工
作物１００は回転主軸２の端部に装着された押え
金具３の方向に向けて（図において左方向）移動
を始め、工作物１００の左端部、図の例において
はスピンドルＢの左端部が押え金具３の突起５の
先端部（端部基準面）６と当接するまで移動して
停止する。その状態で引き続いて圧油を送給する
ことにより圧油は静圧軸受部分２１の通孔２３に
形成した溝２５及び油溜り部２６内に流入するこ
とになり、通孔２３の内周面とスピンドルＢの外
周面との間の潤滑及び位置決めが行われ、且つ、
スピンドルＢの左端面に作用する圧力即ち押圧手
段により、工作物１００は押え金具３の突起５の
端部基準面６と静圧軸受機構２０との間で回転の
み可能な状態で保持される状態となる。適宜の手
段によつてカツプリング７に装着されたピン８が
工作物１００の係合孔Ｃと係合する。この状態で
通常の手段により回転主軸２は回転を始め、適宜
の制御機構を介して、工作物１００の加工面Ｐ，
P′に対して旋削加工を行うことができる。 Next, the manner of use of the workpiece holding mechanism in the lathe according to this invention will be explained. When attaching the workpiece 100 to the workpiece holding mechanism of this lathe, first, the bolt 28 is removed and the hydrostatic bearing mechanism 20 is removed from the lathe body of the lathe headstock unit 1. An appropriate part of the workpiece 100, in the illustrated case, a part of the spindle B, is used as a hydrostatic bearing part through the through hole 23 of the bearing part 21 of the hydrostatic bearing mechanism 20.
Insert into. In this state, the hydrostatic bearing mechanism 20 and the workpiece 100 are fixed to the support member 10 using bolts 28. Next, a hydraulic pipe 30 is connected to the main body portion 22 of the hydrostatic bearing mechanism 20 via a coupler 31.
is attached, and pressure oil is supplied into the pressure oil chamber hole 24 via a hydraulic means (not shown). Due to the hydraulic pressure, the workpiece 100 begins to move toward the presser fitting 3 attached to the end of the rotating spindle 2 (leftward in the figure), and the left end of the workpiece 100, in the example shown, spindle B. The left end portion of the presser metal member 3 moves until it comes into contact with the tip portion (end reference surface) 6 of the protrusion 5 and then stops. By continuously supplying pressure oil in this state, the pressure oil flows into the groove 25 formed in the through hole 23 of the hydrostatic bearing portion 21 and into the oil reservoir 26, and the inner circumferential surface of the through hole 23. lubrication and positioning between the spindle B and the outer peripheral surface of the spindle B, and
Due to the pressure applied to the left end surface of the spindle B, that is, the pressing means, the workpiece 100 is held in a state where it can only rotate between the end reference surface 6 of the projection 5 of the presser metal fitting 3 and the hydrostatic bearing mechanism 20. becomes. A pin 8 attached to the coupling ring 7 by an appropriate means engages with the engagement hole C of the workpiece 100. In this state, the rotating main shaft 2 starts rotating by normal means, and the machined surface P of the workpiece 100,
Turning can be performed on P′.
以上、この考案による旋盤における工作物保持
機構の一実施例について詳述したけれども、この
考案は、上記の詳細な構造に限定されるものでな
いことは勿論である。例えば、静圧軸受機構２０
の軸受部分２１に溝２５及び油溜り部２６を形成
し、該溝２５及び油溜り部２６内の圧油によつて
工作物１００の潤滑性を保障したが、このような
構成に換えて、軸受部分を自己潤滑性を持つ材
料、例えばセラミツクスを用いて構成することも
可能であり、その場合にはより一層精密な旋削加
工を行うことが可能である。また、押え金具３を
用いることなく回転主軸２の端部をそのまま端部
基準面とすることもできる。したがつて、この考
案は、その実用新案登録請求の範囲に記載された
事項により構成される技術的思想の範囲内で種々
の構成に設計変更を行い得るものである。 Although one embodiment of the workpiece holding mechanism in a lathe according to this invention has been described in detail above, it goes without saying that this invention is not limited to the detailed structure described above. For example, the hydrostatic bearing mechanism 20
A groove 25 and an oil reservoir 26 are formed in the bearing portion 21 of the bearing part 21, and the lubricity of the workpiece 100 is ensured by the pressure oil in the groove 25 and the oil reservoir 26. It is also possible to construct the bearing part using a self-lubricating material, for example ceramics, in which case it is possible to perform even more precise turning. Further, the end of the rotating main shaft 2 can be used as the end reference surface without using the presser metal fitting 3. Therefore, the design of this invention can be modified into various configurations within the scope of the technical idea defined by the matters stated in the claims for the utility model registration.
この考案による旋盤における工作物保持機構
は、上記のように構成されており、次の効果を有
する。即ち、この旋盤における工作物保持機構
は、個々のパーツ、例えば、円筒状ハウジングと
スピンドルを組み立てた工作物即ち工作物組立体
が通常のチヤツクでは保持出来ない形状のもので
あつても、静圧軸受機構の軸受部分の形状を適宜
変更することにより旋削加工即ち機械加工が可能
な状態で工作物組立体を保持することができ、工
作物組立体の個々のパーツ自体の加工は勿論のこ
と、両者を組立てた状態の工作物を旋盤にセツト
し、工作物組立体自体（具体的には、工作物組立
体のスピンドル）を静圧軸受部に構成することが
可能となり、各パーツの組立てに伴う累積誤差の
増大を防止した形で精密仕上げ加工を行うことが
可能となる。また、工作物を支持するのにいわゆ
る機械的チヤツクを使用せずに、工作物組立体自
体を静圧軸受部に構成し、該静圧軸受部を静圧軸
受機構で直接的に静圧軸受で支持するので、静圧
軸受機構で保持される部分即ちスピンドルに対し
予め高精度の加工仕上げを施しておいてもその部
分が損傷を受けることがなく、結果的に径方向の
基準面を高精度に保持することができ、また、チ
ヤツキングに伴う歪の発生もないこと等から工作
物に対して高精度の旋削加工による仕上げ加工が
可能となる。
The workpiece holding mechanism in the lathe according to this invention is constructed as described above and has the following effects. In other words, the workpiece holding mechanism in this lathe is able to maintain static pressure even if the individual parts, such as a workpiece assembly made by assembling a cylindrical housing and a spindle, have a shape that cannot be held by a normal chuck. By appropriately changing the shape of the bearing portion of the bearing mechanism, it is possible to hold the workpiece assembly in a state where turning or machining is possible, as well as machining of the individual parts of the workpiece assembly themselves. It is now possible to set the workpiece with both assembled parts on a lathe, and configure the workpiece assembly itself (specifically, the spindle of the workpiece assembly) into a hydrostatic bearing section, making it possible to assemble each part. It becomes possible to perform precision finishing machining while preventing the accumulative error from increasing. In addition, without using a so-called mechanical chuck to support the workpiece, the workpiece assembly itself is configured as a hydrostatic bearing part, and the hydrostatic bearing part is directly supported by the hydrostatic bearing mechanism. Since the spindle is supported by the hydrostatic bearing mechanism, even if the part that is held by the hydrostatic bearing mechanism, that is, the spindle, is processed with high precision in advance, that part will not be damaged, and as a result, the radial reference plane can be raised. It is possible to maintain accuracy, and since there is no distortion due to chucking, it is possible to finish the workpiece by turning with high accuracy.
第１図はこの考案による旋盤における工作物保
持機構の一実施例を示す一部断面図、第２図は第
１図における旋盤における工作物保持機構におけ
る静圧軸受の軸受部分の要部拡大図、及び第３図
は第２図の線−における断面図である。１…
…旋盤主軸台ユニツト、２……回転主軸、３……
軸方向押え金具、４，９，１１，２８……ボル
ト、５……突起、６……軸方向端部基準面、７…
…カツプリング、８……ピン、１０……支持部
材、２０……静圧軸受機構、２１……静圧軸受部
分、２２……本体部分、２３……通孔、２４……
圧油室孔、２５……溝、２６……油溜り部、２７
……フランジ、３０……圧油管、３１……カツプ
ラー、３２……バイト、３３……刃物台、１００
……工作物、Ａ……円筒状ハウジング、Ｂ……ス
ピンドル、Ｃ……係合孔、Ｐ，P′……旋削加工
面、Ｌ−Ｌ，L1−L1……軸心。
Fig. 1 is a partial sectional view showing an embodiment of the workpiece holding mechanism in a lathe according to this invention, and Fig. 2 is an enlarged view of the main part of the bearing portion of the hydrostatic bearing in the workpiece holding mechanism in the lathe shown in Fig. 1. , and FIG. 3 are cross-sectional views taken along the line - in FIG. 2. 1...
...Lathe headstock unit, 2...Rotating spindle, 3...
Axial holding bracket, 4, 9, 11, 28... Bolt, 5... Protrusion, 6... Axial end reference surface, 7...
...Coupling, 8...Pin, 10...Support member, 20...Static pressure bearing mechanism, 21...Static pressure bearing part, 22...Body part, 23...Through hole, 24...
Pressure oil chamber hole, 25...Groove, 26...Oil reservoir portion, 27
...Flange, 30...Pressure oil pipe, 31...Cup puller, 32...Bite, 33...Turret, 100
... Workpiece, A ... Cylindrical housing, B ... Spindle, C ... Engagement hole, P, P' ... Turned surface, L-L, L 1 -L 1 ... Axis center.
Claims (1)
物組立体のスピンドルの外径で構成される静圧
軸受部、該静圧軸受部を回動可能に保持し且つ
旋盤の固定部に設けた支持部材に取付けた静圧
軸受機構、前記回転主軸側に設けた端部基準
面、及び前記工作物組立体を前記端部基準面と
前記静圧軸受機構との間で前記端部基準面に押
圧状態に保持する押圧手段、を有することを特
徴とする旋盤における工作物保持機構。 (2) 前記工作物組立体を前記回転主軸に装置した
カツプリングに取付けたことを特徴とする実用
新案登録請求の範囲第１項に記載の旋盤におけ
る工作物保持機構。 (3) 前記静圧軸受機構を前記固定部から延長した
前記支持部材に着脱自在に装着し、前記静圧軸
受機構を前記回転主軸の軸心と同心上に整合し
た状態に配置したことを特徴とする実用新案登
録請求の範囲第１項に記載の旋盤における工作
物保持機構。[Scope of Claim for Utility Model Registration] (1) A hydrostatic bearing section consisting of the outer diameter of the spindle of a workpiece assembly arranged on the extension of the axis of the rotating main shaft of a lathe, the hydrostatic pressure bearing section being rotatable. a hydrostatic bearing mechanism which is held at the same position and attached to a support member provided on a fixed part of the lathe, an end reference surface provided on the rotating main shaft side, and the workpiece assembly is connected to the end reference surface and the hydrostatic bearing mechanism. A workpiece holding mechanism in a lathe, comprising: a pressing means for holding the workpiece in a pressed state against the end reference surface between the mechanism and the workpiece holding mechanism. (2) A workpiece holding mechanism in a lathe according to claim 1, wherein the workpiece assembly is attached to a coupling mounted on the rotating main shaft. (3) The hydrostatic bearing mechanism is removably attached to the support member extending from the fixing part, and the hydrostatic bearing mechanism is disposed so as to be coaxially aligned with the axis of the rotating main shaft. A workpiece holding mechanism in a lathe according to claim 1 of the utility model registration claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986140691U JPH0226566Y2 (en) | 1986-09-13 | 1986-09-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986140691U JPH0226566Y2 (en) | 1986-09-13 | 1986-09-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6347805U JPS6347805U (en) | 1988-03-31 |
| JPH0226566Y2 true JPH0226566Y2 (en) | 1990-07-19 |
Family
ID=31047778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986140691U Expired JPH0226566Y2 (en) | 1986-09-13 | 1986-09-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0226566Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4784883B2 (en) * | 2005-02-14 | 2011-10-05 | セイコーインスツル株式会社 | Spindle spindle device and machine tool |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55137802A (en) * | 1979-04-10 | 1980-10-28 | Citizen Watch Co Ltd | Center correcting system for machine tool |
-
1986
- 1986-09-13 JP JP1986140691U patent/JPH0226566Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55137802A (en) * | 1979-04-10 | 1980-10-28 | Citizen Watch Co Ltd | Center correcting system for machine tool |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6347805U (en) | 1988-03-31 |
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