JPS61279404A - Chucking device for cylindrical work - Google Patents
Chucking device for cylindrical workInfo
- Publication number
- JPS61279404A JPS61279404A JP60118715A JP11871585A JPS61279404A JP S61279404 A JPS61279404 A JP S61279404A JP 60118715 A JP60118715 A JP 60118715A JP 11871585 A JP11871585 A JP 11871585A JP S61279404 A JPS61279404 A JP S61279404A
- Authority
- JP
- Japan
- Prior art keywords
- work
- workpiece
- collet
- cylindrical
- cylindrical workpiece
- 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.)
- Pending
Links
Landscapes
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
この発明は、円筒形状の工作物(ワーク)を内径基準で
工作機械の主軸などに保持するためのチャッキング装置
の改良に関する
(従来技術とその問題点)
中空円筒形状のワークの外周面を研削加工するような場
合、従来一般には、第3図のように円筒ワークWが円筒
研削盤などにチャッキングされる。Detailed Description of the Invention (Field of Industrial Application) This invention relates to an improvement in a chucking device for holding a cylindrical workpiece on the main shaft of a machine tool based on its inner diameter (compared to the prior art). Problems) When grinding the outer circumferential surface of a hollow cylindrical workpiece, conventionally the cylindrical workpiece W is generally chucked into a cylindrical grinder or the like as shown in FIG.
第3図において、10はマンドレル、12は心押し軸で
、これらの先端の小径部10a、12aを円筒ワークW
の両端から筒内に挿入し、小径部ioa、i2aの根元
の段部でもって円筒ワークWの両端面を両側から挟み込
んで固定する。In FIG. 3, 10 is a mandrel, 12 is a tailstock shaft, and the small diameter portions 10a and 12a at the tips of these are connected to the cylindrical workpiece W.
is inserted into the cylinder from both ends of the cylindrical workpiece W, and both end surfaces of the cylindrical workpiece W are sandwiched and fixed from both sides by the stepped portions at the roots of the small diameter portions ioa and i2a.
第3図のチャッキング装置では、円筒ワークWの両端面
をマンドレル10ど心押し軸12の段部で押えつけてい
るため、ワークWの両端面については加工できないとい
う問題がある。また、ワークWをぞの内径基準でチャッ
キングする場合、マンドレル10の小径部10aと心押
し@12の小径部12aを円筒ワークWの内径とほどん
ど一致させなければならないが、そうするどワークWと
マント;ノル10、心押し軸12の嵌合が堅くなりすぎ
、ワークWの内径寸法誤差によってはマンドレル10や
心押し軸12をこれに挿入できなくなる。The chucking device shown in FIG. 3 has a problem in that both end surfaces of the cylindrical workpiece W cannot be processed because both end surfaces of the cylindrical workpiece W are held down by the stepped portions of the mandrel 10 and the tailstock shaft 12. Furthermore, when chucking the workpiece W based on the inner diameter of the tube, the small diameter part 10a of the mandrel 10 and the small diameter part 12a of the tail stock @12 must be made to almost match the inner diameter of the cylindrical workpiece W. The fitting between the mandrel 10 and the tailstock shaft 12 becomes too tight, and the mandrel 10 and the tailstock shaft 12 cannot be inserted into the workpiece W depending on an error in the inner diameter of the workpiece W.
したがって、現実的には小径部10a。12aとワーク
Wの内径との間には若干の差をつけておかなければなら
ず、それがワークWの位@誤差となる。ワークWが正し
く内径基準で位置決めされずに外周面の研削加工などが
行なわれると、外径の円筒度や内径と外径との同軸度が
悪くなる。Therefore, in reality, the small diameter portion 10a. A slight difference must be made between the inner diameter of the work W and the inner diameter of the work W, and this becomes an error of the work W. If the workpiece W is not correctly positioned based on the inner diameter and the outer peripheral surface is subjected to grinding, the cylindricity of the outer diameter and the coaxiality between the inner diameter and the outer diameter deteriorate.
第4図に別の従来例を示している。ここではマンドレル
10の小径部10aに環状のゴムバッド14を嵌め、さ
らにその先端側に金属製のブツシュ16を嵌め、このブ
ツシュ16の端面をマンドレル10の先端に捩込んだボ
ルト18と座金20とで軸方向に押圧する構成となって
いる。ゴムバッド14の外径は円筒ワークWの内径より
若干小さい。FIG. 4 shows another conventional example. Here, an annular rubber pad 14 is fitted to the small diameter portion 10a of the mandrel 10, and a metal bushing 16 is fitted to the tip side of the rubber pad 14, and the end surface of the bushing 16 is connected to a bolt 18 screwed into the tip of the mandrel 10 and a washer 20. It is configured to press in the axial direction. The outer diameter of the rubber pad 14 is slightly smaller than the inner diameter of the cylindrical work W.
この装置を円筒ワークWの筒内に挿入し、ゴムバッド1
4がワークWの中央付近にくる位置状態とし、ボルト1
8を捩込み、ゴムバッド14を軸方向に圧縮し、ゴムバ
ッド14の外径を圧縮変形によって拡張させる。ゴムバ
ッド14の外径拡張により円筒ワークWの内周面に放射
状に力が作用し、その力でワークWが固定される。Insert this device into the cylinder of the cylindrical workpiece W, and
4 is near the center of the workpiece W, and bolt 1
8 is screwed in, the rubber pad 14 is compressed in the axial direction, and the outer diameter of the rubber pad 14 is expanded by compressive deformation. Due to the expansion of the outer diameter of the rubber pad 14, force acts radially on the inner peripheral surface of the cylindrical work W, and the work W is fixed by this force.
第4図のチャッキング装置ではワークWの端面の加工も
可能になるが、ワークWの固定、解放をボルト18の回
転によって行なわなければならず、ワークWの着脱に時
間がかかり生産性が悪いという問題がある。またゴムバ
ッド14の損耗が激しく、これをたびたび交換しなけれ
ばならず、これも非常に煩わしかった。The chucking device shown in Fig. 4 enables machining of the end face of the workpiece W, but the workpiece W must be fixed and released by rotating the bolt 18, and it takes time to attach and detach the workpiece W, resulting in poor productivity. There is a problem. In addition, the rubber pad 14 was severely worn and had to be replaced frequently, which was also very troublesome.
(発明の目的)
この発明は上述した従来の問題点に鑑みなされたもので
、その目的は、円筒ワークの端面加工が可能で、円筒ワ
ークの内径基準でこれを正確に位置決めでき、また円筒
ワークの着脱が非常に簡単に短時間で行なえるようにし
たチャッキング装置を提供することにある。(Objective of the Invention) This invention was made in view of the above-mentioned conventional problems, and its purpose is to enable end face processing of a cylindrical workpiece, to accurately position the cylindrical workpiece based on the inner diameter of the cylindrical workpiece, and to To provide a chucking device which can be attached and detached very easily and in a short time.
(発明の構成)
そこでこの発明では、円筒ワークの筒内に該ワークの内
径より若干小さな外径の割コレットを挿入し、この割コ
レットの端面からこれの筒内に先細のテーパー軸を適宜
圧力で挿入することによって、上記割コレットの外径を
拡張させ、上記円筒ワークをその内周面に放射状に作用
する力で保持する構成とした。(Structure of the Invention) Therefore, in the present invention, a split collet having an outer diameter slightly smaller than the inner diameter of the work is inserted into the cylinder of a cylindrical work, and a tapered shaft is inserted into the cylinder from the end face of the split collet to apply appropriate pressure. By inserting the split collet, the outer diameter of the split collet is expanded, and the cylindrical workpiece is held by a force that acts radially on the inner circumferential surface of the split collet.
(実施例)
第1図および第2図はこの発明の一実施例によるチャッ
キング装置を示している。両図において、30は主軸で
、この主軸30の先端に一体的に同心に割コレット32
が設けられている。割コレット32は、開口端に向けて
径大のテーパ一孔38を有する円筒体に、先端側から軸
方向に沿ったスリット34を等間隔で複数本形成したも
のである。(Embodiment) FIGS. 1 and 2 show a chucking device according to an embodiment of the present invention. In both figures, 30 is a main shaft, and a splitting collet 32 is integrally and concentrically attached to the tip of this main shaft 30.
is provided. The split collet 32 is a cylindrical body having a tapered hole 38 with a large diameter toward the open end, and a plurality of slits 34 are formed at equal intervals along the axial direction from the tip side.
また割コレット32の中央部分には、環状の帯をなす大
径部36が一体に形成されている。この大径部36の外
径は円筒ワークWの内径より若干小さくなっている。Further, a large diameter portion 36 in the form of an annular band is integrally formed in the center portion of the split collet 32. The outer diameter of this large diameter portion 36 is slightly smaller than the inner diameter of the cylindrical workpiece W.
40は主軸30と同軸上に割コレット32と対向゛して
心押し台などに取付けられたテーパー軸で、割コレット
32に対向した先端側が先細になっており、割コレット
32のテーパ一孔38に同心に嵌合する。A tapered shaft 40 is attached to a tailstock or the like coaxially with the main shaft 30 and facing the split collet 32. The tip side facing the split collet 32 is tapered, and the tapered hole 38 of the split collet 32 is tapered. Fits concentrically.
テーパー軸40は図示しない送り機構によって軸方向に
往復動するが、割コレット32のテーパ一孔38にテー
パー軸40を嵌合する際の押圧力はスプリングなどによ
って所定の大きさの力になるように制御されている。The tapered shaft 40 is reciprocated in the axial direction by a feed mechanism (not shown), but the pressing force when fitting the tapered shaft 40 into the taper hole 38 of the split collet 32 is adjusted to a predetermined amount by a spring or the like. is controlled by.
上記のチャッキング装置によって円筒ワークWをチャッ
キングするには、まず、テーパー軸40を後退させて、
これを割コレット32のテーパ一孔38から抜いておく
。次に円筒ワークWの筒内に割コレット32を相対的に
挿入するようにワークWを装着し、ワークWの中央部分
に帯状の大径部36が当てかわれる位置状態にする。In order to chuck the cylindrical workpiece W using the above-mentioned chucking device, first, the tapered shaft 40 is moved backward,
This is pulled out from the tapered hole 38 of the split collet 32. Next, the workpiece W is mounted so that the split collet 32 is relatively inserted into the cylinder of the cylindrical workpiece W, and the workpiece W is brought into a position where the belt-shaped large diameter portion 36 is applied to the central portion of the workpiece W.
次にテーパー軸40を前進させ、先細の先端部分を割コ
レット32のテーパ一孔38内に圧入する。このときの
テーパー軸40の圧入力は前述のようにスプリングなど
によって制御されている。Next, the tapered shaft 40 is advanced, and the tapered tip portion is press-fitted into the tapered hole 38 of the split collet 32. The pressing force of the tapered shaft 40 at this time is controlled by a spring or the like as described above.
テーパー軸40が圧入されることにより、スリット34
を有する割コレット32は校効果によって外方へ広がり
、その外径が拡張する。大径部36 ′の外径も
もちろん拡張し、その周面が円筒ワークWの内周面に均
一に接し、内時ワークWの内周面に放射状に均一な押圧
力が作用する。この押圧力で円筒ワークは割コレット3
2に固定保持される。By press-fitting the tapered shaft 40, the slit 34
The split collet 32 having a split collet 32 expands outward due to the calibration effect, and its outer diameter expands. Of course, the outer diameter of the large diameter portion 36' is expanded, and its circumferential surface uniformly contacts the inner circumferential surface of the cylindrical workpiece W, and a uniform pressing force acts radially on the inner circumferential surface of the cylindrical workpiece W. This pressing force splits the cylindrical workpiece into collet 3.
It is held fixed at 2.
第1図は円筒ワークWが割コレット32に固定された状
態を示しているが、図から明らかなように円筒ワークW
の外周面の加工だけでなくワークWの両端面の加工も何
ら支障なく行なえる。FIG. 1 shows a state in which the cylindrical work W is fixed to the split collet 32, and as is clear from the figure, the cylindrical work W
Not only the outer circumferential surface of the workpiece W but also both end surfaces of the workpiece W can be processed without any problem.
ワークを取り外すには、テーパー軸40を割コレット3
2から抜けばよく、そうすれば円筒ワークWの固定力は
作用しなくなるので、ワークWを割コレット32から簡
単に取りはずせる。以上のワークWの着脱操1作は簡単
なハンドリング装置によっで容易に自動化でき、極めて
高速に行なえる。To remove the workpiece, split the taper shaft 40 with the collet 3.
2, and then the fixing force of the cylindrical workpiece W will no longer act, so the workpiece W can be easily removed from the split collet 32. The above-described operation of attaching and detaching the work W can be easily automated using a simple handling device and can be performed at extremely high speed.
なお上記の説明で明らかなように、ワークWの固定力は
割コレット32に対するテーパー軸40の圧入力によっ
て調節可能であり、ワークWの強度や寸法に応じてこの
圧入力を適宜に設定しておく。そうすればワークWの固
定状態が極めて安定であり、しかもワークWの変形など
を防ぎ、正確な内径基準により高い加工精度が得られる
。As is clear from the above explanation, the force for fixing the workpiece W can be adjusted by the pressing force of the tapered shaft 40 against the split collet 32, and this pressing force can be set appropriately according to the strength and dimensions of the workpiece W. put. In this way, the fixed state of the workpiece W is extremely stable, and deformation of the workpiece W can be prevented, and high machining accuracy can be obtained due to the accurate inner diameter reference.
(発明の効果)
以上詳細に説明したように、この発明に係る円筒ワーク
のチャッキング装置によれば、円筒ワークをチャッキン
グした状態でその外周面だけでなく両端面の研削加工な
ども可能であり、またワークWの着脱操作は極めて簡単
であり、自動化、高速化が容易である。また円筒ワーク
を内径基準にして正確に位置決めできるので、外径円筒
度や内径と外径の同軸度を高精度に仕上げる加工が可能
である。(Effects of the Invention) As explained in detail above, according to the chucking device for a cylindrical workpiece according to the present invention, it is possible to grind not only the outer peripheral surface but also both end surfaces of the cylindrical workpiece while it is being chucked. Moreover, the operation of attaching and detaching the workpiece W is extremely simple, and automation and speeding up are easy. In addition, since the cylindrical workpiece can be accurately positioned with respect to the inner diameter, it is possible to perform processing to achieve high precision in the cylindricity of the outer diameter and the coaxiality of the inner and outer diameters.
第1図はこの発明の一実施例によるチャッキング装置に
円筒ワークを固定した状態の断面図、第2図は第1図に
おける割コレット32の詳細を示す斜視図、第3図およ
び第4図は従来の円筒ワークのチャッキング装置の2つ
の構成例を示す断面図である。
W・・・・・・ワーク 32・・・割コレット
34・・・スリット 36・・・大径部38・・
・テーパ一孔 40・・・テーパー軸第2図
第3図
第4図FIG. 1 is a cross-sectional view of a cylindrical workpiece fixed to a chucking device according to an embodiment of the present invention, FIG. 2 is a perspective view showing details of the split collet 32 in FIG. 1, and FIGS. 3 and 4. 1A and 1B are cross-sectional views showing two configuration examples of a conventional chucking device for a cylindrical workpiece. W...Work 32...Split collet 34...Slit 36...Large diameter part 38...
・Tapered hole 40...Tapered shaft Fig. 2 Fig. 3 Fig. 4
Claims (1)
な外径の割コレットを挿入し、この割コレットの端面か
らこれの筒内に先細のテーパー軸を適宜圧力で挿入する
ことによって、上記割コレットの外径を拡張させ、上記
円筒ワークをその内周面に放射状に作用する力で保持す
ることを特徴とする円筒ワークのチャッキング装置。(1) By inserting a split collet with an outer diameter slightly smaller than the inner diameter of the workpiece into the cylinder of a cylindrical workpiece, and inserting a tapered shaft into the cylinder from the end face of the splitting collet with appropriate pressure, the above-mentioned A chucking device for a cylindrical workpiece, characterized in that the outer diameter of a split collet is expanded and the cylindrical workpiece is held by a force that acts radially on the inner peripheral surface of the cylindrical workpiece.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60118715A JPS61279404A (en) | 1985-06-03 | 1985-06-03 | Chucking device for cylindrical work |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60118715A JPS61279404A (en) | 1985-06-03 | 1985-06-03 | Chucking device for cylindrical work |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61279404A true JPS61279404A (en) | 1986-12-10 |
Family
ID=14743303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP60118715A Pending JPS61279404A (en) | 1985-06-03 | 1985-06-03 | Chucking device for cylindrical work |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61279404A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4217079Y1 (en) * | 1964-05-20 | 1967-10-02 |
-
1985
- 1985-06-03 JP JP60118715A patent/JPS61279404A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4217079Y1 (en) * | 1964-05-20 | 1967-10-02 |
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