JP3096837B2 - Lathe workpiece holding device - Google Patents
Lathe workpiece holding deviceInfo
- Publication number
- JP3096837B2 JP3096837B2 JP06125871A JP12587194A JP3096837B2 JP 3096837 B2 JP3096837 B2 JP 3096837B2 JP 06125871 A JP06125871 A JP 06125871A JP 12587194 A JP12587194 A JP 12587194A JP 3096837 B2 JP3096837 B2 JP 3096837B2
- Authority
- JP
- Japan
- Prior art keywords
- workpiece
- fixed
- shaft
- head
- thrust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Jigs For Machine Tools (AREA)
- Turning (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、主軸と心押し軸との間
で被加工物を保持する旋盤の被加工物保持装置、特に、
円筒状などの両端が開口した比較的長尺な被加工物に対
して好適な被加工物保持装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a workpiece holding device for a lathe for holding a workpiece between a main shaft and a tailstock shaft.
The present invention relates to a workpiece holding device suitable for a relatively long workpiece having both ends opened such as a cylindrical shape.
【０００２】[0002]
【従来の技術】従来の旋盤において円筒状の被加工物を
加工する場合には、図２に示すように、主軸（図示せ
ず）側に内掴み型コレットチャック５０、心押し軸（図
示せず）側に、円錐形のテーパー面５１を有するヘッド
５２をそれぞれ設け、コレットチャック５０のコレット
５３を、円筒状の被加工物Ｗの一端開口部内で外側に開
いて被加工物Ｗの一端を内側から掴むとともに、ヘッド
５２のテーパー面５１を被加工物Ｗの他端開口に押し付
け、軸方向に一定の推力を加えて被加工物Ｗを固定し、
その外周を加工していた。2. Description of the Related Art When processing a cylindrical workpiece on a conventional lathe, as shown in FIG. 2, an inner gripping collet chuck 50 and a tailstock shaft (not shown) are provided on a spindle (not shown) side. The head 52 having a conical tapered surface 51 is provided on each side, and the collet 53 of the collet chuck 50 is opened outward in one end opening of the cylindrical workpiece W to open one end of the workpiece W. While grasping from the inside, the tapered surface 51 of the head 52 is pressed against the other end opening of the workpiece W, and a constant thrust is applied in the axial direction to fix the workpiece W,
The outer periphery was processed.
【０００３】[0003]
【発明が解決しようとする課題】しかし、これによる
と、コレットチャック５０で被加工物Ｗを内側から掴ん
で完全に拘束するため、コレットチャック５０の精度が
悪いと主軸の回転中心Ｏ１と被加工物の中心Ｏ２とがズ
レ、被加工物の長さが長くなればなるほど加工精度が低
くなる問題があった。また、コレットチャックの開閉機
構の可動部には必ず摩擦があるため、常に同じ状態で被
加工物を保持できなかった。However, according to this, since the workpiece W is grasped from the inside by the collet chuck 50 and is completely restrained, if the precision of the collet chuck 50 is poor, the rotation center O1 of the main shaft and the workpiece W are not processed. There has been a problem that the center O2 of the object is shifted, and the longer the length of the workpiece, the lower the processing accuracy. Further, since the movable portion of the opening and closing mechanism of the collet chuck always has friction, the workpiece cannot always be held in the same state.
【０００４】そこで、本発明の目的は、従来のこのよう
な問題点に鑑み、円筒状などの両端が開口した被加工物
を中心ズレを生ずることなく精度良く保持できるように
して、被加工物が長尺であっても精密加工を可能にする
こと、また被加工物を常に同じ状態で保持できるように
すること、更にその着脱の作業性も向上できるようにす
ることにある。In view of the above problems, an object of the present invention is to make it possible to accurately hold a cylindrical or other workpiece having both open ends without causing a center shift. The object of the present invention is to enable precision machining even if the object is long, to enable the workpiece to be always held in the same state, and to improve the workability of attaching and detaching the object.
【０００５】[0005]
【課題を解決するための手段】本発明による被加工物保
持装置は、主軸１側の取付台４に、先端に凹部２１ｂを
有する固定凸部２１ａを設けたこと、両端が開口した被
加工物の一端開口に一部が嵌入するように、先端部のみ
に円錐台形のテーパー部２０を有する固定ヘッド３を、
その基端の凸部３ａを固定凸部２１ａの先端の凹部２１
ｂに嵌合させ、しかも固定ヘッド３の基端面を固定凸部
２１ａの先端面に当接させた状態で、ネジ２２により主
軸１側の取付台４に着脱自在に固定したこと、心押し軸
２の先端の取付台２６に、スラスト軸２４を軸方向に摺
動自在に装着したこと、このスラスト軸２４をスプリン
グ２９で主軸１側に付勢したこと、被加工物の他端開口
に一部が嵌入するように、先端部のみに円錐台形のテー
パー部２３を有するプッシュヘッド７の基端に凸部７ａ
を設け、この凸部７ａをスラスト軸２４の先端の凹部２
４ｃに嵌合させ、しかもプッシュヘッド７の基端面をス
ラスト軸２４の先端面に当接させた状態で、該プッシュ
ヘッド７をネジ２５によりスラスト軸２４の先端に着脱
自在に固定したこと、を特徴とする。According to the present invention, there is provided a workpiece holding apparatus comprising: a mounting base 4 provided on a main shaft 1 side provided with a fixed convex portion 21a having a concave portion 21b at a tip; The fixed head 3 having a truncated cone-shaped taper portion 20 only at the tip end so that a part thereof fits into one end opening of
The convex part 3a at the base end is fixed to the concave part 21 at the tip of the fixed convex part 21a.
b, while the base end surface of the fixed head 3 is in contact with the distal end surface of the fixed convex portion 21a, and is removably fixed to the mounting base 4 on the main shaft 1 side with the screw 22; 2 that the thrust shaft 24 is slidably mounted in the axial direction on the mounting base 26 at the end of the workpiece 2, that the thrust shaft 24 is urged toward the main shaft 1 by a spring 29, At the base end of the push head 7 having a frusto-conical taper portion 23 only at the distal end so that the portion fits, a convex portion 7a
And the convex portion 7a is connected to the concave portion 2 at the tip of the thrust shaft 24.
4c, and the push head 7 is detachably fixed to the distal end of the thrust shaft 24 with the screw 25 while the base end surface of the push head 7 is in contact with the distal end surface of the thrust shaft 24. Features.
【０００６】[0006]
【作用】本発明においては、主軸側の固定ヘッドと心押
し軸側のプッシュヘッドの両方とも、被加工物の両端の
開口部内に一部を嵌入した状態で被加工物を保持する。
このとき、スプリングより推力を与えられているプッシ
ュロッドが被加工物を固定ヘッド側に向かって押し、両
ヘッドの外周面に形成された円錐台形のテーパー部が、
主軸と被加工物との中心を、被加工物の両側から合わせ
る機能をする。被加工物は、従来のようにコレットチャ
ックで掴むようなことなく、固定ヘッドとプッシュヘッ
ドとで挟んで保持されるが、これらヘッドともその一部
を被加工物の両端開口部に嵌入させるので、被加工物を
保持する安定性の面で問題がないのに加え、被加工物の
着脱も容易である。固定ヘッドとプッシュヘッドとも、
被加工物の開口部のサイズ（内径）に応じて簡単に交換
できる。According to the present invention, both the fixed head on the spindle side and the push head on the tailstock shaft hold the workpiece in a state where a part thereof is fitted into the openings at both ends of the workpiece.
At this time, the push rod given the thrust from the spring pushes the workpiece toward the fixed head, and the frustoconical taper formed on the outer peripheral surfaces of both heads,
It functions to align the center of the spindle with the workpiece from both sides of the workpiece. The workpiece is held between the fixed head and the push head without being gripped by the collet chuck as in the related art, but these heads are also partially inserted into the openings at both ends of the workpiece. In addition to the fact that there is no problem in the stability of holding the workpiece, the workpiece can be easily attached and detached. Both fixed head and push head
It can be easily replaced according to the size (inner diameter) of the opening of the workpiece.
【０００７】[0007]
【実施例】以下、本発明の実施例を図面に基づいて詳細
に説明する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【０００８】図１において、旋盤の主軸１と心押し軸２
とは同一軸線上で対向し、そのそれぞれに取付台４、２
６が固定されている。そして、主軸１側には、取付台４
の前面に固定された座板２１に固定凸部２１ａが設けら
れ、この固定凸部２１ａの先端に、先端部のみに円錐台
形のテーパー部２０を有する固定ヘッド３がネジ２２で
固定されている。その際に、固定ヘッド３の基端の凸部
３ａを固定凸部２１ａの先端の凹部２１ｂに嵌合させ、
しかも固定ヘッド３の基端面を固定凸部２１ａの先端面
に当接させた状態で、ネジ２２を固定ヘッド３の中央に
貫通させて緊締してある。In FIG. 1, a spindle 1 and a tailstock 2 of a lathe are shown.
Oppose each other on the same axis, and the
6 is fixed. And, on the spindle 1 side, a mounting table 4
A fixed convex portion 21a is provided on a seat plate 21 fixed to the front surface of the fixed convex portion 21a, and a fixed head 3 having a frusto-conical tapered portion 20 only at the distal end portion is fixed to the distal end of the fixed convex portion 21a with a screw 22. . At this time, the convex portion 3a at the base end of the fixed head 3 is fitted into the concave portion 21b at the distal end of the fixed convex portion 21a,
Moreover, the screw 22 is passed through the center of the fixed head 3 and tightened while the base end surface of the fixed head 3 is in contact with the distal end surface of the fixed projection 21a.
【０００９】一方、心押し軸２側には、先端部のみに円
錐台形のテーパー部２３を有する短いプッシュヘッド７
が、その基端の凸部７ａをスラスト軸２４の先端の凹部
２４ｃに嵌合させたうえ、スラスト軸２４の先端にネジ
２５で固定してある。このネジ２５もプッシュロッド７
の中央を貫通している。スラスト軸２４は、軸部２４ａ
の後端に鍔部２４ｂを設けたもので、その鍔部２４ｂ
を、心押し軸２に固定された取付台２６の案内穴２７に
摺動自在に嵌合させるとともに、軸部２４ａを取付台２
６の前面に固定されたスラスト軸受２８に摺動自在に嵌
合させてある。そして、スラスト軸２４は、案内穴２７
内のコイルスプリング２９により前方（主軸１側）に付
勢されている。このコイルスプリング２９は、スラスト
軸２４の後面に植設されたスプリングガイドピン３０に
より伸縮を案内される。また、案内穴２７の内面には、
スラスト軸２４の鍔部２４ｂに設けられた孔３１に嵌入
してスラスト軸２４の回転を規制する回転止めピン３２
が植設されている。On the other hand, on the tailstock shaft 2 side, a short push head 7 having a frusto-conical taper portion 23 only at the tip end portion.
However, the protrusion 7a at the base end is fitted into the recess 24c at the tip of the thrust shaft 24, and is fixed to the tip of the thrust shaft 24 with the screw 25. This screw 25 is also a push rod 7
Through the center of the The thrust shaft 24 has a shaft portion 24a.
Is provided with a flange 24b at the rear end thereof.
Is slidably fitted in a guide hole 27 of a mounting base 26 fixed to the tailstock shaft 2, and the shaft portion 24 a is attached to the mounting base 2.
6 is slidably fitted to a thrust bearing 28 fixed to the front surface. And, the thrust shaft 24 is provided with the guide hole 27.
Is urged forward (toward the main shaft 1) by a coil spring 29 inside. The coil spring 29 is guided to expand and contract by a spring guide pin 30 implanted on the rear surface of the thrust shaft 24. Also, on the inner surface of the guide hole 27,
A detent pin 32 that fits into a hole 31 provided in a flange portion 24b of the thrust shaft 24 and restricts rotation of the thrust shaft 24.
Has been planted.
【００１０】この装置では、固定ヘッド３のテーパー部
２０とプッシュヘッド７のテーパー部２３とを円筒形の
被加工物Ｗの両端開口縁に圧接させて被加工物Ｗを保持
する。プッシュヘッド７は、スプリング２９によって推
力を与えられているため、心押し軸２が前後運動しても
被加工物Ｗを保持できる。また、固定ヘッド３及びプッ
シュヘッド７として外径の異なるものをそれぞれ用意し
て交換することにより、被加工物Ｗの大きさ（内径）の
違いに対応できる。In this apparatus, the tapered portion 20 of the fixed head 3 and the tapered portion 23 of the push head 7 are brought into pressure contact with both open edges of the cylindrical workpiece W to hold the workpiece W. Since the push head 7 is given a thrust by the spring 29, the work W can be held even if the tailstock shaft 2 moves back and forth. Further, by preparing and exchanging the fixed head 3 and the push head 7 having different outer diameters, it is possible to cope with a difference in the size (inner diameter) of the workpiece W.
【００１１】なお、本発明の保持装置で保持できる被加
工物Ｗは、その全長が円筒形のものに限られるものでは
なく、少なくとも両端が開口したもの（両端部のみに穴
を有すものも含む）であればよい。The workpiece W that can be held by the holding device of the present invention is not limited to a cylindrical one having a full length, but is open at least at both ends (some having holes only at both ends). Included).
【００１２】[0012]
【発明の効果】本発明によれば次のような効果がある。According to the present invention, the following effects can be obtained.
【００１３】 主軸側の固定ヘッドの一部と心押し軸
側のプッシュヘッドの一部方とを、被加工物の両端の開
口部内に嵌入させ、スプリングにより推力を与えられて
いるプッシュロッドで被加工物を固定ヘッド側に向かっ
て押し、両ヘッドのテーパー部を被加工物の開口縁に圧
接させて保持するので、その保持と同時に主軸と被加工
物との中心を自動的に合わせることができる。従って、
円筒状などの両端が開口した被加工物を中心ズレを生ず
ることなく精度良く保持でき、被加工物が長尺であって
も精密加工が可能となる。 被加工物は、従来のよう
にコレットチャックで掴むようなことなく、固定ヘッド
とプッシュヘッドとで挟んで保持されるが、これらヘッ
ドともその一部を被加工物の両端開口部に嵌入させ、し
かもプッシュヘッドに推力を与えるので、被加工物を常
に安定した状態で保持できるのに加え、被加工物の着脱
も容易に行える。[0013] A part of the fixed head on the spindle side and a part of the push head on the tailstock shaft are fitted into openings at both ends of the workpiece, and are covered by a push rod given thrust by a spring. The workpiece is pushed toward the fixed head side, and the tapered portions of both heads are pressed against the opening edge of the workpiece and held, so that the center of the spindle and the workpiece can be automatically aligned at the same time as the holding. it can. Therefore,
A workpiece having a cylindrical shape with both ends opened can be held with high precision without causing a center shift, and precision processing can be performed even when the workpiece is long. The workpiece is held between the fixed head and the push head without being gripped by the collet chuck as in the related art.However, these heads and a part thereof are fitted into the openings at both ends of the workpiece, In addition, since a thrust is applied to the push head, the workpiece can always be held in a stable state, and the workpiece can be easily attached and detached.
【００１４】 スプリングによりプッシュヘッドに推
力を与えるので、心押し軸が前後運動しても、上記のよ
うな保持状態を安定して維持できる。Since a thrust is applied to the push head by the spring, the above-mentioned holding state can be stably maintained even if the tailstock shaft moves back and forth.
【００１５】 固定ヘッド及びプッシュヘッドとも
に、ネジにより着脱自在としたので、これら固定ヘッド
及びプッシュヘッドとして外径の異なるものをそれぞれ
用意して交換することにより、被加工物の大きさ（内
径）の違いに容易に対応できる。[0015] Since both the fixed head and the push head are detachable with screws, the fixed head and the push head having different outer diameters are prepared and exchanged, respectively, to thereby reduce the size (inner diameter) of the workpiece. Can easily handle differences.
【００１６】 固定ヘッド及びプッシュヘッドとも
に、正確かつ安定して固定される。Both the fixed head and the push head are accurately and stably fixed.
【図１】本発明の実施例の被加工物保持装置の断面図で
ある。FIG. 1 is a sectional view of a workpiece holding device according to an embodiment of the present invention.
【図２】従来例による被加工物の保持状態を示す断面図
である。FIG. 2 is a cross-sectional view showing a state of holding a workpiece according to a conventional example.
Ｗ 被加工物 １ 主軸 ２ 心押し軸 ３ 固定ヘッド ７ プッシュヘッド ７ａ 凸部 ２０ 固定ヘッドのテーパー部 ２２ ネジ ２３ プッシュヘッドのテーパー部 ２４ スラスト軸２４ ２４ｃ 凹部 ２５ ネジ ２９ スプリング W Workpiece 1 Main shaft 2 Tail shaft 3 Fixed head 7 Push head 7a Convex portion 20 Tapered portion of fixed head 22 Screw 23 Tapered portion of push head 24 Thrust shaft 24 24c Concave portion 25 Screw 29 Spring
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭57−15647（ＪＰ，Ａ) 特開 昭63−169209（ＪＰ，Ａ) 特開 昭52−8581（ＪＰ，Ａ) 実開 昭63−17738（ＪＰ，Ｕ) 実開 平３−55133（ＪＰ，Ｕ) 実開 平１−83506（ＪＰ，Ｕ) 実開 平５−67408（ＪＰ，Ｕ) 実開 平１−129009（ＪＰ，Ｕ) 特公 昭58−30084（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) B23Q 3/12 B23B 23/04 B23Q 3/06 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-57-15647 (JP, A) JP-A-63-169209 (JP, A) JP-A-52-8581 (JP, A) 17738 (JP, U) Japanese Utility Model 3-55133 (JP, U) Japanese Utility Model 1-83506 (JP, U) Japanese Utility Model 5-67408 (JP, U) Japanese Utility Model 1-129009 (JP, U) JP-B-58-30084 (JP, B2) (58) Fields investigated (Int. Cl. 7 , DB name) B23Q 3/12 B23B 23/04 B23Q 3/06
Claims (1)
持する旋盤の被加工物保持装置において、 前記主軸１側の取付台４に、先端に凹部２１ｂを有する
固定凸部２１ａを設けたこと、 両端が開口した被加工物の一端開口に一部が嵌入するよ
うに、先端部のみに円錐台形のテーパー部２０を有する
固定ヘッド３を、その基端の凸部３ａを前記固定凸部２
１ａの先端の凹部２１ｂに嵌合させ、しかも固定ヘッド
３の基端面を固定凸部２１ａの先端面に当接させた状態
で、ネジ２２により前記主軸１側の取付台４に着脱自在
に固定したこと、 前記心押し軸２の先端の取付台２６に、スラスト軸２４
を軸方向に摺動自在に装着したこと、 このスラスト軸２４をスプリング２９で前記主軸１側に
付勢したこと、 被加工物の他端開口に一部が嵌入するように、先端部の
みに円錐台形のテーパー部２３を有するプッシュヘッド
７の基端に凸部７ａを設け、この凸部７ａを前記スラス
ト軸２４の先端の凹部２４ｃに嵌合させ、しかもプッシ
ュヘッド７の基端面をスラスト軸２４の先端面に当接さ
せた状態で、該プッシュヘッド７をネジ２５によりスラ
スト軸２４の先端に着脱自在に固定したこと、 を特徴とする旋盤の被加工物保持装置。1. A workpiece holding device for a lathe for holding a workpiece between a main shaft 1 and a tailstock shaft 2. A fixed convex portion having a concave portion 21b at a tip end on a mounting base 4 on the main shaft 1 side. The fixed head 3 having a frusto-conical tapered portion 20 only at the distal end so that a part thereof fits into one end opening of the workpiece whose both ends are opened, and the convex portion 3a at the base end is provided. The fixed convex part 2
In a state where the fixed head 3 is fitted in the concave portion 21b at the distal end of the fixed head 3 and the base end surface of the fixed head 3 is in contact with the distal end surface of the fixed convex portion 21a, the fixed head 3 is detachably fixed to the mounting base 4 on the main spindle 1 side by the screw 22. The thrust shaft 24 is attached to the mounting base 26 at the tip of the tailstock shaft 2.
Is mounted slidably in the axial direction, the thrust shaft 24 is urged toward the main shaft 1 by a spring 29, and only the front end portion is fitted so as to partially fit into the other end opening of the workpiece. A convex portion 7a is provided at the base end of the push head 7 having the frustoconical tapered portion 23, and this convex portion 7a is fitted into the concave portion 24c at the tip of the thrust shaft 24, and the base end surface of the push head 7 is connected to the thrust shaft. Wherein the push head 7 is detachably fixed to the distal end of the thrust shaft 24 by a screw 25 in a state in which the push head 7 is in contact with the distal end surface of the lathe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06125871A JP3096837B2 (en) | 1994-05-17 | 1994-05-17 | Lathe workpiece holding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06125871A JP3096837B2 (en) | 1994-05-17 | 1994-05-17 | Lathe workpiece holding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07308840A JPH07308840A (en) | 1995-11-28 |
| JP3096837B2 true JP3096837B2 (en) | 2000-10-10 |
Family
ID=14920999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06125871A Expired - Fee Related JP3096837B2 (en) | 1994-05-17 | 1994-05-17 | Lathe workpiece holding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3096837B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5337364B2 (en) * | 2007-10-12 | 2013-11-06 | 株式会社スグロ鉄工 | Method for producing thin-walled cylindrical metal member with bottom |
| CN103286579A (en) * | 2013-06-04 | 2013-09-11 | 常熟市双月机械有限公司 | Lathe fixture for machining conduit coaxially |
| CN103464974B (en) * | 2013-09-06 | 2016-04-06 | 遵义市节庆机电有限责任公司 | A kind of processing technology of aluminum alloy casing |
| CN104708336A (en) * | 2013-12-12 | 2015-06-17 | 铜陵市永生机电制造有限责任公司 | Clamp special for turning long thin shaft |
| CN103878690B (en) * | 2014-02-24 | 2017-08-25 | 安庆中船柴油机有限公司 | A kind of adjusting center peripheral milling clamping apparatus |
| CN104084335B (en) * | 2014-07-02 | 2018-06-15 | 中山市奔码打印耗材有限公司 | The spraying disk of automatic spraying machine |
| CN105729179A (en) * | 2016-03-30 | 2016-07-06 | 格林精密部件(苏州)有限公司 | Workpiece fixing device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2410540C3 (en) * | 1974-03-06 | 1980-12-04 | Index-Werke Kg Hahn & Tessky, 7300 Esslingen | Quill device |
| JPS528581A (en) * | 1975-07-09 | 1977-01-22 | Hitoo Sato | Center for grinder |
| JPS5715647A (en) * | 1980-06-24 | 1982-01-27 | Fujitsu Ltd | Lathing of hollow thin wall cylinder |
| JPS6317738U (en) * | 1986-07-16 | 1988-02-05 | ||
| JPS63169209A (en) * | 1986-12-29 | 1988-07-13 | Niigata Eng Co Ltd | Automatic deburring device |
| JPH01129009U (en) * | 1988-02-27 | 1989-09-04 | ||
| JPH0567408U (en) * | 1992-02-25 | 1993-09-07 | オークマ株式会社 | Thin-walled cylindrical chucking device |
-
1994
- 1994-05-17 JP JP06125871A patent/JP3096837B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07308840A (en) | 1995-11-28 |
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