JPH026968Y2 - - Google Patents
Info
- Publication number
- JPH026968Y2 JPH026968Y2 JP1984150295U JP15029584U JPH026968Y2 JP H026968 Y2 JPH026968 Y2 JP H026968Y2 JP 1984150295 U JP1984150295 U JP 1984150295U JP 15029584 U JP15029584 U JP 15029584U JP H026968 Y2 JPH026968 Y2 JP H026968Y2
- Authority
- JP
- Japan
- Prior art keywords
- workpiece
- oil
- oil chamber
- center
- main shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 210000000078 claw Anatomy 0.000 claims description 13
- 238000000034 method Methods 0.000 description 5
- 238000003754 machining Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
Landscapes
- Gripping On Spindles (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
この考案は旋盤の両センタ間に少なくとも端部
が小径、例えば12mmφ程度の棒状などの被加工物
を支えて切削する場合に用いるフエースクランプ
チヤツクに関するものである。[Detailed description of the invention] [Industrial application field] This invention is a face clamping machine used when cutting a workpiece with at least one end supporting a small-diameter rod-shaped workpiece, such as a rod with a diameter of about 12 mm, between both centers of a lathe. It's about Yatsuk.
〔従来の技術〕
旋盤の両センタ間に被加工物を支えて切削加工
を行なう場合、回し金を被加工物の外側に固定
し、この回し金の一部から突出している回し金腕
を旋盤の主軸に取付けた回し板に係合させること
により被加工物を駆動する方法がある。また、特
開昭49−97978号公報や特開昭53−14482号公報に
記載されているもののように、両センタで支持し
た被加工物の端面に油圧によつて別個に動く複数
の爪を圧着せしめるようにしたものもある。[Prior art] When cutting a workpiece while supporting it between both centers of a lathe, a rotary wheel is fixed to the outside of the workpiece, and a rotary arm protruding from a part of the rotary wheel is attached to the lathe. There is a method of driving a workpiece by engaging a rotary plate attached to the main shaft of a machine. In addition, as described in Japanese Patent Application Laid-open No. 49-97978 and Japanese Patent Application Laid-Open No. 53-14482, a plurality of pawls that move independently by hydraulic pressure are attached to the end face of a workpiece supported by both centers. Some are made to be crimped.
上記の各種の方法のうち、回し金を用いる方法
は、駆動は確実であるが、セツトに手数がかか
り、被加工物の外周を全長に亘り加工することが
できない。
Among the various methods described above, the method using a rotary wheel is reliable in driving, but it takes time to set up and cannot process the entire length of the outer periphery of the workpiece.
また、特開昭49−97978号公報記載のものは複
数の爪にそれぞれ別個に油圧を働かせるものであ
るから、１個所から各爪に油圧を加えるようにす
るためには複雑な油路が必要で、油路の形成に手
数がかかり、各爪毎に手動の調整ねじを用いて油
圧を加えるようにすると、油圧の調整に手数がか
かるという問題が生じる。 Furthermore, the method described in JP-A-49-97978 applies hydraulic pressure to multiple pawls separately, so a complicated oil path is required to apply hydraulic pressure to each pawl from one location. However, it takes a lot of time to form the oil passage, and if hydraulic pressure is applied to each pawl using a manual adjustment screw, a problem arises in that it takes a lot of time to adjust the oil pressure.
さらに、特開昭53−14482号公報記載のものは、
センタ支持ヘツドに設けた複数個の爪孔に、それ
ぞれ別個に進退する爪をはめ、爪孔の内端を油溜
とし、この油溜をそれぞれ連通させて各爪が油圧
により連動して被加工物端面に圧着する構成であ
るため、センタ支持ヘツドの形状が複雑となり、
小型に構成することが困難であるという問題があ
る。 Furthermore, what is described in Japanese Patent Application Laid-Open No. 53-14482,
A plurality of pawl holes provided in the center support head are fitted with pawls that move forward and backward separately, and the inner ends of the pawl holes are used as oil reservoirs.The oil reservoirs are communicated with each other and each pawl is linked by hydraulic pressure to machine the workpiece. Since it is configured to be crimped onto the end surface of the object, the shape of the center support head becomes complicated.
There is a problem in that it is difficult to configure it in a small size.
この考案の課題は油圧作動の複数の爪を小径の
部分に設けて簡単な機構により同時に進退させる
ようにしたフエースクランプチヤツクを得ること
である。 The object of this invention is to provide a face clamp chuck in which a plurality of hydraulically actuated pawls are provided in a small diameter portion and are moved forward and backward at the same time by a simple mechanism.
上記の課題を解決するために、この考案は旋盤
の主軸に固定したチヤツク本体の前面から所定深
さの環状の油室を同芯に形成し、この油室に進退
筒を液密を保つてはめ込み、主軸の中心には上記
油室の後部に連動して、圧油の給排を行う送油管
を貫通させ、さらに、油室の圧油を排出させたと
き、進退筒を後退させる復元バネを設け、進退筒
の前部に固定した先細テーパ状のクランプ部材の
細くなつた前端部に、被加工物の端面に喰い込む
複数の爪を設けたフエースクランプチヤツクを提
供する。
In order to solve the above problem, this invention forms an annular oil chamber of a predetermined depth concentrically from the front surface of the chuck body fixed to the main shaft of the lathe, and a reciprocating cylinder is kept liquid-tight in this oil chamber. Fitted into the center of the main shaft is an oil feed pipe that connects to the rear of the oil chamber and supplies and discharges pressure oil, and a restoring spring that moves the forward and backward cylinder back when the pressure oil in the oil chamber is discharged. To provide a face clamp chuck in which a plurality of claws that bite into the end face of a workpiece are provided at the tapered front end of a tapered clamp member fixed to the front part of a reciprocating cylinder.
この考案は上記の構成であるから、端部が細い
棒状となつた被加工物の端面のセンタ孔にフエー
スクランプチヤツクのセンタを係合させるととも
に、そのクランプ部材の爪を被加工物の端面に喰
い込ませる。また、被加工物の他方の端部を回り
センタにより支持する。
Since this device has the above-mentioned configuration, the center of the face clamp chuck is engaged with the center hole of the end surface of the workpiece whose end is in the shape of a thin rod, and the claw of the clamp member is engaged with the center hole of the end surface of the workpiece. Let it bite into you. Further, the other end of the workpiece is supported by the center.
こうして両センタにより被加工物を支えたの
ち、油室に圧油を送りこんで進退筒の後端に油圧
を加えた状態で切削加工を開始する。 After the workpiece is supported by both centers in this way, cutting is started with pressurized oil being fed into the oil chamber and hydraulic pressure being applied to the rear end of the reciprocating cylinder.
この場合、切削加工中に被加工物が僅かでも心
押台の方に移動すると、これと同時に進退筒が油
圧により被加工物に追尾して移動する。従つて被
加工物と、クランプ部材の爪の間に滑りは生じな
い。また、このように被加工物が心押台の方に移
動したときセンタもバネにより直ちに移動して被
加工物のセンタを確保することは勿論である。 In this case, if the workpiece moves even slightly toward the tailstock during cutting, the reciprocating cylinder simultaneously moves to track the workpiece using hydraulic pressure. Therefore, no slippage occurs between the workpiece and the claws of the clamp member. Furthermore, when the workpiece moves toward the tailstock in this manner, the center also moves immediately by the spring to secure the center of the workpiece.
以下この考案の実施例を説明する。 Examples of this invention will be described below.
第１図において、１は旋盤の主軸台（図示省
略）に取付けた主軸で、２はその前端に固定した
チヤツク本体である。この本体２はその前端から
所定の深さの環状の油室３が同芯に形成され、本
体２の中央部は前方へ突出して先細のテーパ部４
となつている。 In FIG. 1, 1 is a main spindle attached to a headstock (not shown) of a lathe, and 2 is a chuck body fixed to its front end. This main body 2 has an annular oil chamber 3 of a predetermined depth concentrically formed from its front end, and a central part of the main body 2 protrudes forward and has a tapered part 4.
It is becoming.
前記の油室３には進退筒５をはめ込み、本体２
の前部には環状体６をボルト止めしてその前端内
周の突縁で進退筒５の前進を制限する。また、進
退筒５の前端にはクランプ部材８をボルトにより
固定する。このクランプ部材８は先細テーパ状で
前記テーパ部４の外側に被さり、その部材８の細
くなつた前端部に複数の爪９を設ける。実施例で
は、上記クランプ部材８の前端部の径は約12mmφ
である。 The reciprocating cylinder 5 is fitted into the oil chamber 3, and the main body 2
An annular body 6 is bolted to the front part of the annular body 6, and the forward movement of the reciprocating cylinder 5 is restricted by a protruding edge on the inner periphery of the front end of the annular body 6. Further, a clamp member 8 is fixed to the front end of the reciprocating cylinder 5 with a bolt. This clamp member 8 has a tapered shape and covers the outside of the tapered portion 4, and a plurality of claws 9 are provided at the tapered front end of the member 8. In the embodiment, the diameter of the front end of the clamp member 8 is approximately 12 mmφ.
It is.
前記進退筒５の外周にはＶ形断面の周溝１０を
設け、環状体６の一部に設けた半径方向の孔１１
にはめたボール１２を周溝１０に復元バネ１３に
より押し込むことによつて進退筒５が前進したと
き後方への復元力を与える。 A circumferential groove 10 with a V-shaped cross section is provided on the outer periphery of the reciprocating cylinder 5, and a radial hole 11 is provided in a part of the annular body 6.
By pushing the fitted ball 12 into the circumferential groove 10 by a restoring spring 13, a restoring force is applied to the rear when the reciprocating cylinder 5 moves forward.
本体２の中央後部の孔１６には送油管１５を固
定し、この送油管１５は主軸１の中心孔を貫通さ
せて、主軸１の後端に達せしめ、ここでロータリ
ジヨイントおよび切換弁を介して油圧ユニツトに
連結する。 An oil feed pipe 15 is fixed to a hole 16 in the center rear part of the main body 2, and this oil feed pipe 15 passes through the center hole of the main shaft 1 and reaches the rear end of the main shaft 1, where the rotary joint and the switching valve are connected. It is connected to the hydraulic unit via.
また、前記孔１６と、油室３の後部を通じる油
孔を設け、送油管１５からの圧油を油室３内に送
り込むと進退筒５の後部に油圧が加わり進退筒５
が周溝１０の後側でボール１２を押して前進する
ように構成する。 In addition, an oil hole is provided that communicates with the hole 16 and the rear part of the oil chamber 3, and when pressure oil from the oil pipe 15 is sent into the oil chamber 3, hydraulic pressure is applied to the rear part of the reciprocating cylinder 5.
is configured to push the ball 12 on the rear side of the circumferential groove 10 and move forward.
１８はテーパ部４の中心の軸孔１９に進退自在
にはめ込んだセンタで、このセンタ１８は、本体
２内のバネ孔２０にはめたバネ２１により鍔２２
を前方に押された押軸２３の前端で前方に押され
ている。さらに、このセンタ１８の後部一側の軸
方向の溝２４にはテーパ部４に固定した回止めピ
ン２５を係合させてあるから、センタ１８は進退
はするが、本体２に対して回転不可である。また
第１図の２６は本体２に固定した回止めピンで、
このピン２６を進退筒５に設けたガイド孔２７に
はめて進退筒５の回止めとする。 Reference numeral 18 denotes a center fitted into the shaft hole 19 at the center of the tapered portion 4 so as to move forward and backward.
is pushed forward by the front end of the push shaft 23, which is pushed forward. Further, since a locking pin 25 fixed to the tapered portion 4 is engaged with an axial groove 24 on one rear side of the center 18, the center 18 can move forward and backward, but cannot rotate relative to the main body 2. It is. In addition, 26 in Fig. 1 is a rotation pin fixed to the main body 2.
This pin 26 is inserted into a guide hole 27 provided in the movable cylinder 5 to prevent the movable cylinder 5 from rotating.
なお、第１図で明らかなように進退筒５の内外
の摺動部はＯリングにより油の洩れ止めを施す。 As is clear from FIG. 1, the sliding parts inside and outside of the reciprocating cylinder 5 are prevented from leaking oil using O-rings.
上記の実施例において、被加工物２８の一端の
センタ孔２９にセンタ１８の先端を係合させると
ともに、被加工物２８の他端のセンタ孔には図示
省略してある心押台に取付けた回りセンタを係合
させ、心押台を主軸台の方向に若干移動させて、
両センタにより被加工物２８を保持すると同時に
クランプ部材８の爪９を被加工物２８の端面にし
つかりと喰い込ませ、さら送油管１５からの油圧
を進退筒５の後端に加えて、爪９が油圧により常
に被加工物２８の端面に圧着させる。 In the above embodiment, the tip of the center 18 is engaged with the center hole 29 at one end of the workpiece 28, and a tailstock (not shown) is attached to the center hole at the other end of the workpiece 28. Engage the rotation center, move the tailstock slightly toward the headstock, and
While holding the workpiece 28 by both centers, the claw 9 of the clamp member 8 is firmly bitten into the end face of the workpiece 28, and furthermore, hydraulic pressure from the oil pipe 15 is applied to the rear end of the reciprocating cylinder 5, and the claw is tightened. 9 is always pressed against the end surface of the workpiece 28 by hydraulic pressure.
ついで、主軸１を回転させ、バイト３０を被加
工物２８に切込ませつつ、第１図の矢印方向に移
動させて切削加工を施す。 Next, the main shaft 1 is rotated, and cutting is performed by moving the cutting tool 30 in the direction of the arrow in FIG. 1 while cutting into the workpiece 28.
バイト３０を矢印方向に動かして被加工物２８
を加工するさい、被加工物２８には心押台の方向
へ推力が働き、回りセンタが軸受部におけるごく
僅かの遊隙によりごく僅かではあるが、移動する
場合がある。 Move the cutting tool 30 in the direction of the arrow to remove the workpiece 28.
When machining the workpiece 28, a thrust is applied to the workpiece 28 in the direction of the tailstock, and the center of rotation may move slightly due to a very small play in the bearing.
このように、被加工物２８が僅かでも移動する
と、油圧で爪９を被加工物２８に押し付けている
進退筒５も瞬間的に移動する。 In this way, when the workpiece 28 moves even slightly, the reciprocating cylinder 5, which presses the claw 9 against the workpiece 28 using hydraulic pressure, also moves instantaneously.
従つて被加工物２８が心押台の方へ移動しても
爪９と被加工物２８間にずれを生ずるおそれがな
い。 Therefore, even if the workpiece 28 moves toward the tailstock, there is no risk of misalignment between the claw 9 and the workpiece 28.
また、加工が終り主軸１の回転を止め、送油管
１５を油タンクに通じると、油室３の油圧が抜け
第１図の状態にあつたボール１２が復元バネ１３
により周溝１０の斜面に沿つて押込まれ、進退筒
５が元の位置に後退し、爪９は被加工物２８から
離れる。 Furthermore, when the machining is completed and the rotation of the spindle 1 is stopped and the oil feed pipe 15 is connected to the oil tank, the oil pressure in the oil chamber 3 is released and the ball 12, which is in the state shown in FIG.
The claw 9 is pushed along the slope of the circumferential groove 10, the reciprocating cylinder 5 retreats to its original position, and the claw 9 separates from the workpiece 28.
この考案は上記のように被加工物を両センタに
より支えて切削加工を施す場合に用いるフエース
クランプチヤツクにおいて、その本体の環状の油
室にはめ込んだ進退筒に先細テーパ状のクランプ
部材を固定し、この部材の細くなつた前端部に複
数の爪を設けて、加工中において、油室に油圧を
加え、爪を被加工物の端面に圧着せしめるように
したから、切削加工中において被加工物が僅かに
心押台の方向に移動した場合、同時に進退筒も爪
とともに同方向に移動するが、圧油を受ける進退
筒の受圧面積はクランプ部材の前端部の直径に比
較してきわめて大きい。従つて圧油の圧力を比較
的低くしても被加工物の端面に対する爪の圧力を
大きくできるので、被切削物と爪の結合はきわめ
て強く、爪と被加工物の滑りによる加工誤差発生
のおそれはない。
This idea is based on the face clamp chuck used when cutting a workpiece while supporting it with both centers, as described above, in which a tapered clamp member is fixed to a reciprocating tube fitted into an annular oil chamber in the main body. However, a plurality of pawls are provided on the tapered front end of this member, and during machining, hydraulic pressure is applied to the oil chamber to press the pawls against the end surface of the workpiece. When the object moves slightly in the direction of the tailstock, the retractable cylinder also moves in the same direction along with the claw, but the pressure receiving area of the retractable cylinder that receives pressure oil is extremely large compared to the diameter of the front end of the clamp member. . Therefore, even if the pressure of the pressurized oil is relatively low, the pressure of the jaw against the end face of the workpiece can be increased, so the connection between the workpiece and the jaw is extremely strong, and machining errors due to slippage between the jaw and the workpiece are avoided. There's no fear.
また、クランプ部材は先細テーパ状でその前端
部が細い棒状の端部を有する被加工物の端部の径
とほぼ等しくなつてるので被加工物の端部を切削
するバイトに対してクランプ部材がじやまをする
ようなおそれはない。 In addition, the clamp member has a tapered shape and its front end has a thin rod-like end that is approximately the same diameter as the end of the workpiece, so the clamp member can be held against the cutting tool that cuts the end of the workpiece. There is no fear of being embarrassed.
さらに、この考案は旋盤の主軸を貫通する送油
管により、環状の油室に油圧を加えるだけで各爪
が同時に前進し、油圧を抜けば復元バネにより進
退筒がクランプ部材や爪とともに後退するので、
駆動機構が著しく簡単であり、油室への油の出入
りは主軸内の送油管を介して行われるので油路も
簡単であるなどの効果がある。 Furthermore, this idea uses an oil pipe that passes through the main shaft of the lathe to move each pawl forward at the same time by simply applying hydraulic pressure to the annular oil chamber, and when the hydraulic pressure is released, a restoring spring causes the reciprocating cylinder to move back together with the clamp member and pawls. ,
The drive mechanism is extremely simple, and since oil enters and exits the oil chamber through an oil feed pipe within the main shaft, the oil passage is also simple.
第１図はこの考案の一実施例を示す縦断側面
図、第２図は同上の一部を拡大した斜視図であ
る。
１……主軸、２……チヤツク本体、３……油
室、５……進退筒、８……クランプ部材、９……
爪、１３……復元バネ、１８……センタ、１９…
…軸孔、２１……バネ、２８……被加工物、２９
……センタ孔。
FIG. 1 is a longitudinal sectional side view showing an embodiment of this invention, and FIG. 2 is a partially enlarged perspective view of the same. 1...Main shaft, 2...Chuck body, 3...Oil chamber, 5...Movement/retraction cylinder, 8...Clamp member, 9...
Claw, 13... Restoration spring, 18... Center, 19...
...shaft hole, 21 ... spring, 28 ... workpiece, 29
...Center hole.
Claims (1)
物の端面には、油圧で押される爪を喰い込ませて
旋盤の主軸の回転を被加工物に伝えるようにする
とともに、バネによりセンタを前方に押したチヤ
ツクにおいて、上記主軸に固定したチヤツク本体
の前面から所定深さの環状の油室を同芯に形成
し、この油室に進退筒を液密を保つてはめ込み、
主軸の中心には上記油室の後部に連通して、圧油
の給排を行う送油管を貫通させ、さらに、油室の
圧油を排出させたとき、進退筒を後退させる復元
バネを設け、進退筒の前部に固定した先細テーパ
状のクランプ部材の細くなつた前端部に、被加工
物の端面に喰い込む複数の爪を設けたフエースク
ランプチヤツク。 The workpiece is supported by both centers, and a pawl pushed by hydraulic pressure is inserted into the end face of the workpiece to transmit the rotation of the main shaft of the lathe to the workpiece, and a spring moves the center forward. When the chuck is pressed, an annular oil chamber of a predetermined depth is formed concentrically from the front surface of the chuck body fixed to the main shaft, and a reciprocating cylinder is fitted into this oil chamber in a fluid-tight manner.
An oil feed pipe that communicates with the rear part of the oil chamber and supplies and discharges pressure oil is passed through the center of the main shaft, and a restoring spring that moves the forward and backward cylinder back when the pressure oil in the oil chamber is discharged is installed. , a face clamp chuck in which a plurality of claws that bite into the end surface of the workpiece are provided at the tapered front end of a tapered clamp member fixed to the front of the reciprocating cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984150295U JPH026968Y2 (en) | 1984-10-02 | 1984-10-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984150295U JPH026968Y2 (en) | 1984-10-02 | 1984-10-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6164909U JPS6164909U (en) | 1986-05-02 |
| JPH026968Y2 true JPH026968Y2 (en) | 1990-02-20 |
Family
ID=30708444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984150295U Expired JPH026968Y2 (en) | 1984-10-02 | 1984-10-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH026968Y2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4830174A (en) * | 1971-08-21 | 1973-04-20 | ||
| JPS4997978A (en) * | 1973-01-26 | 1974-09-17 | ||
| JPS5314482A (en) * | 1976-07-27 | 1978-02-09 | Dakou Seiki Yuugen | Drive center with pawl |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4830174U (en) * | 1971-08-13 | 1973-04-13 |
-
1984
- 1984-10-02 JP JP1984150295U patent/JPH026968Y2/ja not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4830174A (en) * | 1971-08-21 | 1973-04-20 | ||
| JPS4997978A (en) * | 1973-01-26 | 1974-09-17 | ||
| JPS5314482A (en) * | 1976-07-27 | 1978-02-09 | Dakou Seiki Yuugen | Drive center with pawl |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6164909U (en) | 1986-05-02 |
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