JPH11809A - Holding device for cylindrical work - Google Patents

Holding device for cylindrical work

Info

Publication number
JPH11809A
JPH11809A JP15620197A JP15620197A JPH11809A JP H11809 A JPH11809 A JP H11809A JP 15620197 A JP15620197 A JP 15620197A JP 15620197 A JP15620197 A JP 15620197A JP H11809 A JPH11809 A JP H11809A
Authority
JP
Japan
Prior art keywords
collet
diameter
main shaft
cylindrical work
tapered portion
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
Application number
JP15620197A
Other languages
Japanese (ja)
Inventor
Takeshi Morioka
武 森岡
Taizo Kitamura
泰三 北村
Tatsuo Ichinokawa
辰男 市野川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
Original Assignee
Honda Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to JP15620197A priority Critical patent/JPH11809A/en
Priority to US09/095,901 priority patent/US6062116A/en
Publication of JPH11809A publication Critical patent/JPH11809A/en
Pending legal-status Critical Current

Links

Landscapes

  • Gripping On Spindles (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a holding device for a cylindrical work capable of holding precisely the long cylindrical work to carry out precise concentric working of an outer diameter based on an inner diameter or the like. SOLUTION: Provided are a spindle 2 and extended shaft parts 3, 4 extended from both ends of the spindle 2 via tapered parts 5, 6. Provided are collects 13, 14 moving along the tapered parts 5, 6 with an enlarged diameter. Insertion rods 7, 8 moving along an axis of the shaft parts 3, 4 to move the collects 13, 14 are provided in the shaft parts 3, 4. Provided are push-in screws 22, 23 for pushing-in the insertion rods 7, 8. The rods 7, 8 are pushed in with the screws 22, 23 to move the collects 13, 14 to the large diameter side of the tapered parts 5, 6, and outer walls of the collects are pressure-contacted to the inner wall of a work W1 by diameter enlargement of the collects 13, 14 to fix and hold the work W1 .

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、円筒状ワークの外
側面の切削加工等の際に、円筒状ワークの内部に挿通し
て該円筒状ワークを内側から保持する円筒状ワークの保
持装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for holding a cylindrical work, which is inserted into the inside of the cylindrical work and holds the cylindrical work from the inside when cutting the outer surface of the cylindrical work. .

【0002】[0002]

【従来の技術】従来、円筒状ワークに対して切削加工
(例えば内径基準で外径同心加工)や検査等を行う際に
円筒状ワークを保持する保持装置としては、特開平4−
53607号公報に示されるものが知られている。
2. Description of the Related Art Conventionally, as a holding device for holding a cylindrical work when performing a cutting work (for example, an outer diameter concentric processing on the basis of an inner diameter) or an inspection of the cylindrical work, Japanese Patent Laid-Open Publication No.
What is shown by 53607 is known.

【0003】この種の保持装置50は、図5に示すよう
に、互いに接近する方向に移動自在のボス51とプラグ
52とを備え、ボス51とプラグ52とに両端が支持さ
れて円筒状で外径が拡径自在のコレット53を備えてい
る。
As shown in FIG. 5, this type of holding device 50 includes a boss 51 and a plug 52 which are movable in a direction approaching each other, and both ends are supported by the boss 51 and the plug 52 to form a cylindrical shape. A collet 53 whose outer diameter can be freely increased is provided.

【0004】ボス51とプラグ52とは、プラグ52に
形成された挿着軸54を介して互いに連結されてる。プ
ラグ52の挿着軸54は、ボス51と同一軸線に摺動自
在に挿着されている。ボス51とプラグ52とは互いに
対向するテーパ部55、56が形成されており、コレッ
ト53は、その両端部内面がそれぞれのテーパ部55、
56に対応する形状とされている。該コレット53に
は、図示しないが、その一端縁から他端縁近傍まで軸方
向に延びる複数のスリットと、他端縁から一端縁近傍ま
で軸方向に延びる複数のスリットとが交互に配されてい
る。該コレット53は、その外周面に円筒状(図示では
縦断面視)のワークW3 が支持される。そして、ボス5
1とプラグ52とがその両側からの旋盤等の両センタ5
7、58の押圧により互いに接近することにより、該コ
レット53の両端から両テーパ部55、56の大径側が
押入されて、該コレット53の外周面がワークW3 の内
壁に圧接され、ワークW3 を保持することができる。
[0004] The boss 51 and the plug 52 are connected to each other via an insertion shaft 54 formed on the plug 52. The insertion shaft 54 of the plug 52 is slidably inserted on the same axis as the boss 51. The boss 51 and the plug 52 are formed with tapered portions 55 and 56 facing each other, and the inner surface of the both ends of the collet 53 has the respective tapered portions 55 and 56.
The shape corresponds to 56. Although not shown, the collet 53 has a plurality of slits extending in the axial direction from one end edge to the vicinity of the other end edge, and a plurality of slits extending in the axial direction from the other end edge to the vicinity of the one end edge. I have. The collet 53, the workpiece W 3 of is supported (vertical cross section in the illustrated) cylindrical on its outer peripheral surface. And boss 5
1 and the plug 52 are both centers 5 such as a lathe from both sides thereof.
By approaching each other by the pressing of 7,58, the large-diameter side of the both tapered portions 55, 56 from both ends of the collet 53 is pushed, the outer peripheral surface of the collet 53 is pressed against the inner wall of the workpiece W 3, the workpiece W 3 can be held.

【0005】ところで、内径基準で外径同心加工を施す
ワークとしては、前記のワークW3よりも更に長さ寸法
が長く比較的小径の長尺円筒状のもの(例えば、航空機
用ガスタービンの中空シャフト等)が挙げられる。この
ような長尺円筒状のワークを、上記の保持装置50の構
成を採用して保持する場合には、図示しないが、プラグ
52の挿着軸54とコレット53とを、ワークの長さに
応じて比較的長い寸法に形成することが考えられる。
[0005] The workpiece subjected to external径同center machining an inner diameter basis, the work W 3 relatively small diameter as long cylindrical long further length dimension than (e.g., a hollow aircraft gas turbine Shaft, etc.). When such a long cylindrical work is held by adopting the structure of the above-described holding device 50, although not shown, the insertion shaft 54 of the plug 52 and the collet 53 are set to the length of the work. Depending on the case, it is conceivable to form them into relatively long dimensions.

【0006】しかし、上記の保持装置50の構成を採用
すると、ボス51に摺動自在に挿着されたプラグ52の
挿着軸54の寸法誤差等によりボス51とプラグ52と
に軸心ずれが生じるおそれがある。このような軸心ずれ
は、比較的長さが短い場合には微小であっても、長尺円
筒状のワークを保持する場合のようにプラグ52の挿着
軸54とコレット53との長さ寸法が長くなると両端の
軸心ずれが大きくなり、内径基準での外径同心加工等が
高精度に行えない不都合がある。
However, when the above-described structure of the holding device 50 is adopted, the axial center misalignment between the boss 51 and the plug 52 is caused by a dimensional error of the insertion shaft 54 of the plug 52 slidably inserted into the boss 51. May occur. Such an axial misalignment may be minute when the length is relatively short, but may be as small as the length of the insertion shaft 54 of the plug 52 and the collet 53 as in the case of holding a long cylindrical work. If the dimension becomes longer, the axial center deviation of both ends becomes larger, and there is a disadvantage that the outer diameter concentric machining on the basis of the inner diameter cannot be performed with high accuracy.

【0007】また、円筒状ワークの内側が段差を介して
小径部と大径部とを備えて形成されている場合には、コ
レット53が密着する部分が小径部のみとなり、内径基
準の外径同心加工時には大径部に対応する部分に振れが
発生しやすくなって精度のよい加工等が困難となる。
When the inside of the cylindrical work is formed with a small diameter portion and a large diameter portion through a step, only the small diameter portion is in contact with the collet 53, and the outside diameter based on the inside diameter is determined. At the time of concentric machining, run-out is likely to occur in a portion corresponding to the large-diameter portion, and accurate machining or the like becomes difficult.

【0008】[0008]

【発明が解決しようとする課題】かかる不都合を解消し
て、本発明は、長尺の円筒状ワークを精度良く保持して
内径基準の外径同心加工等を精度良く行うことができる
円筒状ワークの保持装置を提供することを目的とする。
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a cylindrical work capable of accurately holding a long cylindrical work and performing an outer diameter concentric machining based on an inner diameter with a high accuracy. It is an object of the present invention to provide a holding device.

【0009】[0009]

【課題を解決するための手段】かかる目的を達成するた
めに、本発明は、円筒状のワークを外挿状態で保持する
円筒状ワークの保持装置であって、主軸と、該主軸より
小径に形成され、該主軸の両端から該主軸と同一軸線上
に延設された一対の延長軸部と、主軸と各延長軸部との
間において主軸から各延長軸部に向かって次第に縮径す
る一対のテーパ部と、該テーパ部の直径方向に貫通して
該テーパ部の軸線方向に長さを有して形成された長孔
と、円筒状に形成され、一端縁から他端縁近傍まで軸方
向に延びる複数の第1スリットと他端縁から一端縁近傍
まで軸方向に延びる複数の第2スリットとを交互に配し
て、内壁が各テーパ部に対応して外径が拡径自在に各テ
ーパ部に装着された一対のコレットと、前記長孔を貫通
してコレットの直径方向に差し亘されて両端が該コレッ
トに支持され、コレットと一体にテーパ部の長孔に沿っ
て移動する連結ピンと、該連結ピンが先端に連結され、
前記長孔に連通し且つ前記各延長軸部の軸線に沿って形
成された挿着孔に進退自在に挿着された一対の挿着杆
と、各挿着孔の外方端部の内壁に形成されたネジ部に螺
合して回転させることにより延長軸部の軸線に沿って移
動して前記挿着杆を押入する押し込みネジとを備えてな
り、該押し込みネジにより前記挿着杆を押入することに
より、前記連結ピンを介してコレットをテーパ部の大径
側に移動させ、該コレットの拡径により円筒状ワークの
内壁に該コレットの外壁を圧接して該円筒状ワークを固
定保持することを特徴とする。
SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a cylindrical work holding device for holding a cylindrical work in an extrapolated state, comprising a main shaft and a smaller diameter than the main shaft. A pair of extension shaft portions formed and extending from both ends of the main shaft on the same axis as the main shaft, and a pair of tapered portions that gradually decrease in diameter from the main shaft toward the respective extension shaft portions between the main shaft and the respective extension shaft portions. A tapered portion, an elongated hole penetrating in the diameter direction of the tapered portion and having a length in the axial direction of the tapered portion, and a cylindrical shape formed from one end edge to the vicinity of the other end edge. A plurality of first slits extending in the direction and a plurality of second slits extending in the axial direction from the other end edge to the vicinity of the one end edge are alternately arranged, and the outer diameter of the inner wall is freely expandable corresponding to each tapered portion. A pair of collets mounted on each tapered portion, and a diameter of the collet passing through the long hole. Wataru has been both ends pointing in direction is supported by the collet, the coupling pin moving along the long hole of the tapered portion to the collet and integral, the connecting pin is connected to the tip,
A pair of insertion rods which are communicated with the elongated holes and are inserted and retracted into insertion holes formed along the axis of each of the extension shafts, and on inner walls of outer ends of the respective insertion holes. A push-in screw that moves along the axis of the extension shaft portion by screwing into and rotating the formed screw portion and pushes in the insertion rod, and pushes the insertion rod in with the push-in screw. By doing so, the collet is moved to the large diameter side of the tapered portion via the connecting pin, and the outer wall of the collet is pressed against the inner wall of the cylindrical work by expanding the diameter of the collet to fix and hold the cylindrical work. It is characterized by the following.

【0010】本発明によってワークを保持するときに
は、先ず、主軸及び延長軸部をワークの内部に挿入す
る。このとき、前記コレットは、テーパ部の小径側に移
動させておく。次いで、押し込みネジを回転させて、挿
着杆を主軸の方向に向かって押入する。挿着杆の移動に
伴って、前記連結ピンを介してコレットがテーパ部の大
径側に移動する。コレットは、テーパ部の大径側に移動
するに従って、前記第1スリット及び第2スリットのス
リット幅が広げられ、該コレットの外径が拡径される。
そして、該コレットの外周面がワークの内壁に密着し、
ワークは、コレット及びテーパ部を介して主軸及び延長
軸部に一体的に保持される。このように、前記コレット
がテーパ部の大径側に移動することによってワークの内
壁とテーパ部との間に押入されて密着するので、コレッ
トとテーパ部との軸心ずれが生じず、ワークを精度よく
保持することができる。
When holding a work according to the present invention, first, the main shaft and the extension shaft are inserted into the inside of the work. At this time, the collet is moved to the smaller diameter side of the tapered portion. Next, the push screw is rotated to push the insertion rod in the direction of the main shaft. With the movement of the insertion rod, the collet moves to the larger diameter side of the tapered portion via the connecting pin. As the collet moves toward the large diameter side of the tapered portion, the slit width of the first slit and the second slit is increased, and the outer diameter of the collet is increased.
Then, the outer peripheral surface of the collet comes into close contact with the inner wall of the work,
The work is integrally held on the main shaft and the extension shaft via the collet and the tapered portion. As described above, since the collet moves toward the large-diameter side of the tapered portion and is pressed into close contact between the inner wall of the work and the tapered portion, the center of the collet and the tapered portion are not misaligned. It can be held accurately.

【0011】更に、本発明は、主軸の両端に一対のコレ
ットを備えている。これによって、長尺円筒状のワーク
を保持する場合にも、各コレットの長さ寸法をワークの
長さ寸法に対応させることなくコンパクトに形成するこ
とができる。また、円筒状ワークの内面の一方側が小径
部とされ、他方側が大径部とされている場合には、一方
側のコレットを小径部に密着させ、他方側のコレットを
大径部に密着させることにより、ワークを主軸と一体的
に保持することができ、内径基準での外径同心加工等を
高精度に行うことができる。従って、本発明によれば、
長尺円筒状のワークを精度よく保持できることはもちろ
ん、ワークの内側が段差を介して小径部と大径部とを備
えて形成されている場合であっても、精度よく保持する
ことができる。
Further, the present invention has a pair of collets at both ends of the main shaft. Accordingly, even when a long cylindrical work is held, each collet can be formed compact without making the length of the collet correspond to the length of the work. Further, when one side of the inner surface of the cylindrical work is a small diameter portion and the other side is a large diameter portion, one side of the collet is brought into close contact with the small diameter portion, and the other side of the collet is brought into close contact with the large diameter portion. Thus, the workpiece can be held integrally with the main shaft, and concentric machining of the outer diameter on the basis of the inner diameter can be performed with high accuracy. Thus, according to the present invention,
Not only can a long cylindrical work be held with high accuracy, but even if the inside of the work is formed with a small diameter portion and a large diameter portion via a step, it can be held with high accuracy.

【0012】[0012]

【発明の実施の形態】本発明の一実施形態を図面に基づ
いて説明する。図1は本実施形態の保持装置を示す説明
的断面図、図2は要部の作動の説明図、図3はコレット
を示す説明図、図4は他のワークの保持状態を示す説明
的断面図である。
An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory sectional view showing a holding device of the present embodiment, FIG. 2 is an explanatory view of an operation of a main part, FIG. 3 is an explanatory view showing a collet, and FIG. 4 is an explanatory sectional view showing a holding state of another work. FIG.

【0013】本実施形態の保持装置1は、図1中仮想線
示した長尺の円筒状ワークW1 (本実施形態では長さ約
1m)を外挿状態で保持するものである。
The holding device 1 of this embodiment holds a long cylindrical work W 1 (about 1 m in length in this embodiment) indicated by a virtual line in FIG. 1 in an extrapolated state.

【0014】該保持装置1は、図1に示すように、円柱
状の主軸2と、該主軸2の両端から主軸2と同一軸線状
に延びる一対の延長軸部3、4とを備えている。主軸2
と各延長軸部3、4との間にはテーパ部5、6が形成さ
れている。主軸2と、テーパ部5、6と、両延長軸部
3、4とは同一軸線状に一体に形成されている。延長軸
部3、4は、主軸2より小径に形成されており、その内
部に棒状の挿着杆7、8を挿着自在とする挿着孔9、1
0が形成されている。各テーパ部5、6は、図1及び図
2(a)に示すように、主軸2の両端と各延長軸部3、
4との間において、主軸2から延長軸部3、4に向かっ
て次第に縮径する形状を有している。また、各テーパ部
5、6には、その直径方向に貫通してテーパ部5、6の
軸線方向に長さを有する長孔11、12が形成されてい
る。
As shown in FIG. 1, the holding device 1 includes a columnar main shaft 2 and a pair of extension shaft portions 3 and 4 extending coaxially with the main shaft 2 from both ends of the main shaft 2. . Spindle 2
Tapered portions 5 and 6 are formed between the extension shaft portions 3 and 4. The main shaft 2, the tapered portions 5, 6 and the extended shaft portions 3, 4 are integrally formed in the same axis. The extension shaft portions 3 and 4 are formed to have a smaller diameter than the main shaft 2 and have insertion holes 9 and 1 in which rod-like insertion rods 7 and 8 can be freely inserted.
0 is formed. As shown in FIGS. 1 and 2 (a), each of the tapered portions 5 and 6 has both ends of the main shaft 2 and each of the extended shaft portions 3,
4 between the main shaft 2 and the extension shaft portions 3 and 4. Each of the tapered portions 5 and 6 has elongated holes 11 and 12 penetrating in the diameter direction and having a length in the axial direction of the tapered portions 5 and 6.

【0015】また、各テーパ部5、6には、内壁が各テ
ーパ部5、6に対応して外径が拡径自在とされた円筒状
のコレット13、14が、各テーパ部5、6に沿って移
動自在に挿着されている。該コレット13、14には、
図3(a)に示すように、一端縁から他端縁近傍まで軸
方向に延びる複数の第1スリット15と、他端縁から一
端縁近傍まで軸方向に延びる複数の第2スリット16と
が交互に形成されている。該コレット13、14は、各
テーパ部5、6の小径側(各延長軸部3、4側)にある
ときは、図3(a)に示すようにその外径が小とされ、
各テーパ部5、6の大径側(主軸2側)にあるときは、
図3(b)に示すように、各スリット15、16の切れ
幅が広がって外径が大とされる。コレット13、14に
は、その直径方向に貫通する孔部17が形成されてお
り、図1及び図2(a)に示すように、前記長孔11、
12を貫通してコレット13、14の孔部17に差し亘
された連結ピン18、19が設けられている。該連結ピ
ン18、19は、前記挿着杆7、8の先端に連結されて
おり、挿着杆7、8が延長軸部3、4の軸線に沿って移
動することによって、長孔11、12に沿って移動し、
コレット13、14をテーパ部5、6に沿って移動させ
る。
Each of the tapered portions 5 and 6 has a cylindrical collet 13 or 14 having an inner wall whose outer diameter can be freely increased corresponding to each of the tapered portions 5 and 6. It is movably inserted along. The collets 13 and 14 include:
As shown in FIG. 3A, a plurality of first slits 15 extending in the axial direction from one end edge to the vicinity of the other end edge, and a plurality of second slits 16 extending in the axial direction from the other end edge to the vicinity of the one end edge are provided. They are formed alternately. When the collets 13 and 14 are on the small diameter side of each of the tapered portions 5 and 6 (each of the extension shaft portions 3 and 4), the outer diameter is small as shown in FIG.
When on the large diameter side (spindle 2 side) of each of the tapered portions 5 and 6,
As shown in FIG. 3B, the cut width of each of the slits 15 and 16 is increased and the outer diameter is increased. Holes 17 are formed in the collets 13 and 14 so as to penetrate in the diametrical direction, and as shown in FIGS.
Connection pins 18 and 19 are provided to penetrate the hole 12 of the collets 13 and 14 and pass through the hole 12. The connecting pins 18 and 19 are connected to the distal ends of the insertion rods 7 and 8, respectively. Move along 12,
The collets 13 and 14 are moved along the tapered portions 5 and 6.

【0016】また、図1及び図2(a)に示すように、
各延長軸部3、4の挿着孔9、10の端部内壁にはネジ
部20、21が形成されており、それぞれのネジ部2
0、21には、押し込みネジ22、23が螺合する。押
し込みネジ22、23は、その軸心部に図示しないレン
チ穴が形成されており、該レンチ穴に図示しないレンチ
を差し込んで回転操作が行えるようになっている。
As shown in FIGS. 1 and 2A,
Screw portions 20 and 21 are formed on the inner walls of the end portions of the insertion holes 9 and 10 of the extension shaft portions 3 and 4, respectively.
Push screws 22 and 23 are screwed into 0 and 21. Each of the push screws 22 and 23 has a wrench hole (not shown) formed at an axis thereof, and a wrench (not shown) is inserted into the wrench hole to perform a rotation operation.

【0017】次に、該保持装置1にワークW1 を保持す
る際の作動を図2(a)及び図2(b)を参照して説明
する。なお、図2においては、図1示の保持装置の左半
部を図示し、一方側のテーパ部5及びコレット13の作
動を説明するが、図2示されていない他方側のテーパ部
6及びコレット14の作動については同様であるのでそ
の説明を省略する。
Next, will be described the operation at the time of holding the workpiece W 1 to the holding device 1 with reference to FIGS. 2 (a) and 2 (b). In FIG. 2, the left half of the holding device shown in FIG. 1 is illustrated, and the operation of the taper portion 5 on one side and the collet 13 will be described, but the taper portion 6 on the other side not shown in FIG. Since the operation of the collet 14 is the same, a description thereof will be omitted.

【0018】図2(a)に示すように、先ず、保持装置
1を筒状ワークW1 の内部(本実施形態において採用し
たワークW1 のは、内部が内径基準穴としてホーニング
仕上げされている)の所定位置まで挿入する。このと
き、前記コレット13を、テーパ部5の小径側(延長軸
部3側)に位置させておくことにより、該コレット13
の外径を小としておく。次いで、前記挿着孔9のネジ部
20に押し込みネジ22を螺着挿入する。更に押し込み
ネジ22を回転させて前記挿着杆7を主軸2の方向に押
し込み移動させる。
[0018] As shown in FIG. 2 (a), first, the internal (workpiece W 1 of which is employed in the present embodiment the holding device 1 the cylindrical workpiece W 1, the internal is honed as the inner diameter reference hole ) To the specified position. At this time, the collet 13 is positioned on the small diameter side (the extension shaft 3 side) of the tapered portion 5 so that the collet 13 is
Keep the outside diameter small. Next, a push screw 22 is screwed into the screw portion 20 of the insertion hole 9 and inserted. Further, the push screw 22 is rotated to push and move the insertion rod 7 in the direction of the main shaft 2.

【0019】これにより、図2(b)に示すように、前
記挿着杆7が移動して、前記連結ピン11が前記テーパ
部5の長孔11に沿って主軸2の方向に移動し、連結ピ
ン18によってコレット13がテーパ部5の大径側(主
軸2側)に移動する。それに伴って、コレット13は、
テーパ部5の大径部分によって各スリット15、16の
切れ幅が広げられ、外径が拡径してワークW1 の内壁に
圧接される。コレット13は、テーパ部5とワークW1
との間にあって両者に圧接された状態となるので、コレ
ット13とテーパ部5(及び主軸2)との軸心ずれが生
じることがない。
As a result, as shown in FIG. 2B, the insertion rod 7 moves, and the connecting pin 11 moves in the direction of the main shaft 2 along the elongated hole 11 of the tapered portion 5, The collet 13 moves to the large diameter side (the main shaft 2 side) of the tapered portion 5 by the connecting pin 18. Along with that, collet 13
Cutting width of each slit 15, 16 is expanded by the large diameter portion of the tapered portion 5, the outer diameter is pressed diametrically enlarged on the inner wall of the workpiece W 1. The collet 13 includes the tapered portion 5 and the work W 1.
Between the collet 13 and the tapered portion 5 (and the main shaft 2).

【0020】そして、ワークW1 は、本実施形態のよう
に長尺のものであっても、両コレット13、14を介し
て精度よく保持され、例えば、図1に示すように、両端
側に旋盤等の両センタ24、25に支持して内径基準で
外径同心加工を施す場合にも、ワークW1 の内外径同軸
度が極めて高い保持状態として高精度な外径加工を施す
ことができる。
[0020] Then, the workpiece W 1, even those long as in the present embodiment, accuracy is maintained over both the collet 13 and 14, for example, as shown in FIG. 1, the both ends when subjected to external径同center machining an inner diameter of a reference support to both centers 24, 25 such as a lathe can also be subjected to high precision outer diameter processing as holding state and out径同axis degree is extremely high workpiece W 1 .

【0021】また、上述した実施形態においては、ワー
クW1 の内径が同一の部分を両コレット13、14の同
様な拡径寸法で圧接保持する例を示したが、本発明によ
れば、図4に示すように、内部に大径部xと小径部yと
が形成された、所謂段付き内径を有するワークW2 につ
いても容易にワークW2 の内径に対応して精度良く保持
することができる。即ち、図4に示すように、それぞれ
のコレット13、14を、ワークW2 の大径部xと小径
部yとに対応して拡径時の外径が異なるように移動させ
ることにより、それぞれのコレット13、14が、ワー
クW2 の大径部xと小径部yとに確実に圧接され、高精
度に保持することができる。また、図示しないが、ワー
クW2 内部の小径部yに圧接させる一方のコレット14
よりも肉厚を大としたコレットを、ワークW2 内部の大
径部xに対応させて設けることができる。或いは、ワー
クW2 内部の大径部xに対応する側のテーパ部の形状を
大として、該テーパ部に対応するコレットを装着するこ
とで、ワークW2 の大径部xと小径部yとのそれぞれに
コレットを対応させて高精度に保持することができる。
Further, in the embodiment described above, the inner diameter of the workpiece W 1 is an example in which the pressure contact of the same parts in the same diameter dimensions of both the collet 13 and 14, according to the present invention, FIG. as shown in 4, a large-diameter portion x inside the small-diameter portion y is formed, to be held accurately in response to easily work W 2 inside diameter also work W 2 having a so-called stepped inner diameter it can. That is, as shown in FIG. 4, each of the collet 13, 14, by the outer diameter at the large-diameter portion x and the small diameter portion y and in response to diameter of the workpiece W 2 moves differently, respectively the collet 13 and 14, is reliably pressed against the large diameter portion x of the workpiece W 2 and the small diameter portion y, can be maintained with high accuracy. Although not shown, one of the collet 14 to be pressed against the workpiece W 2 inside of the small diameter portion y
The collet has a thickness larger than can be provided in correspondence with the work W 2 inside of the large diameter portion x. Alternatively, the shape of the tapered portion of the side corresponding to the workpiece W 2 inside of the large diameter portion x as large, by mounting the collet corresponding to the tapered portion, the large diameter portion x of the workpiece W 2 and the small diameter portion y Can be held with high accuracy by associating a collet with each of them.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の一実施形態の保持装置を示す説明的断
面図。
FIG. 1 is an explanatory sectional view showing a holding device according to an embodiment of the present invention.

【図2】要部の作動の説明図。FIG. 2 is an explanatory diagram of an operation of a main part.

【図3】コレットを示す説明図。FIG. 3 is an explanatory view showing a collet.

【図4】他のワークの保持状態を示す説明的断面図。FIG. 4 is an explanatory sectional view showing a holding state of another work.

【図5】従来の保持装置を示す説明的断面図。FIG. 5 is an explanatory sectional view showing a conventional holding device.

【符号の説明】[Explanation of symbols]

1 ,W2 …ワーク、1…保持装置、2…主軸、3,4
…延長軸部、5,6…テーパ部、7,8…挿着杆、9,
10…挿着孔、11,12…長孔、13,14…コレッ
ト、15…第1スリット、16…第2スリット、18,
19…連結ピン、20,21…ネジ部、22,23…押
し込みネジ。
W 1 , W 2 ... work, 1 ... holding device, 2 ... spindle, 3, 4
... Extended shaft part, 5,6 ... Taper part, 7,8 ... Insertion rod, 9,
Reference numeral 10: insertion hole, 11, 12: long hole, 13, 14: collet, 15: first slit, 16: second slit, 18,
19 ... connecting pin, 20, 21 ... screw part, 22, 23 ... push-in screw.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】円筒状のワークを外挿状態で保持する円筒
状ワークの保持装置であって、主軸と、該主軸より小径
に形成され、該主軸の両端から該主軸と同一軸線上に延
設された一対の延長軸部と、主軸と各延長軸部との間に
おいて主軸から各延長軸部に向かって次第に縮径する一
対のテーパ部と、該テーパ部の直径方向に貫通して該テ
ーパ部の軸線方向に長さを有して形成された長孔と、円
筒状に形成され、一端縁から他端縁近傍まで軸方向に延
びる複数の第1スリットと他端縁から一端縁近傍まで軸
方向に延びる複数の第2スリットとを交互に配して、内
壁が各テーパ部に対応して外径が拡径自在に各テーパ部
に装着された一対のコレットと、前記長孔を貫通してコ
レットの直径方向に差し亘されて両端が該コレットに支
持され、コレットと一体にテーパ部の長孔に沿って移動
する連結ピンと、該連結ピンが先端に連結され、前記長
孔に連通し且つ前記各延長軸部の軸線に沿って形成され
た挿着孔に進退自在に挿着された一対の挿着杆と、各挿
着孔の外方端部の内壁に形成されたネジ部に螺合して回
転させることにより延長軸部の軸線に沿って移動して前
記挿着杆を押入する押し込みネジとを備えてなり、該押
し込みネジにより前記挿着杆を押入することにより、前
記連結ピンを介してコレットをテーパ部の大径側に移動
させ、該コレットの拡径により円筒状ワークの内壁に該
コレットの外壁を圧接して該円筒状ワークを固定保持す
ることを特徴とする円筒状ワークの保持装置。
1. A holding device for a cylindrical work for holding a cylindrical work in an extrapolated state, comprising a main shaft and a smaller diameter than the main shaft, and extending from both ends of the main shaft on the same axis as the main shaft. A pair of extension shaft portions provided, a pair of taper portions that gradually decrease in diameter from the main shaft toward each extension shaft portion between the main shaft and each extension shaft portion, and a pair of taper portions penetrating in a diameter direction of the taper portion. A long hole formed to have a length in the axial direction of the tapered portion; a plurality of first slits formed in a cylindrical shape and extending in the axial direction from one end to the other end; and one end to the other end A plurality of second slits extending in the axial direction are arranged alternately, and a pair of collets mounted on each tapered portion so that the inner wall can freely expand the outer diameter corresponding to each tapered portion, and the long hole is formed. The collet is pierced in the diametric direction of the collet and both ends are supported by the collet. A connection pin that moves integrally along the long hole of the tapered portion, and the connection pin is connected to the tip, and is freely movable into and out of an insertion hole that communicates with the long hole and is formed along the axis of each of the extension shaft portions. And a pair of insertion rods inserted into the insertion hole, screwed into a screw formed on the inner wall of the outer end of each insertion hole, and rotated along the axis of the extension shaft by rotating. A push screw for pushing in the insertion rod, and pushing the insertion rod with the push screw to move the collet to the large diameter side of the tapered portion via the connecting pin, thereby expanding the collet. An apparatus for holding a cylindrical work, wherein the outer wall of the collet is pressed against the inner wall of the cylindrical work depending on the diameter to fix and hold the cylindrical work.
JP15620197A 1997-06-13 1997-06-13 Holding device for cylindrical work Pending JPH11809A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP15620197A JPH11809A (en) 1997-06-13 1997-06-13 Holding device for cylindrical work
US09/095,901 US6062116A (en) 1997-06-13 1998-06-11 Method of manufacturing hollow shaft and mandrel for holding cylindrical hollow shaft blank

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15620197A JPH11809A (en) 1997-06-13 1997-06-13 Holding device for cylindrical work

Publications (1)

Publication Number Publication Date
JPH11809A true JPH11809A (en) 1999-01-06

Family

ID=15622585

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15620197A Pending JPH11809A (en) 1997-06-13 1997-06-13 Holding device for cylindrical work

Country Status (1)

Country Link
JP (1) JPH11809A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113059490A (en) * 2021-03-09 2021-07-02 广东今科机床有限公司 Adjustable shaft core grinding clamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113059490A (en) * 2021-03-09 2021-07-02 广东今科机床有限公司 Adjustable shaft core grinding clamp

Similar Documents

Publication Publication Date Title
JP6674805B2 (en) Machine vise with centering adjustment function
US10422620B2 (en) Contact-type position measuring device and measuring method using the same
US6062116A (en) Method of manufacturing hollow shaft and mandrel for holding cylindrical hollow shaft blank
JPH11809A (en) Holding device for cylindrical work
US5551710A (en) Universal modular sleeve-clamp systems
JP2003048129A (en) Stage fixing device and method
JP2001162410A (en) Workpiece fixing device
JP2013188802A (en) Tool holder and lathe device
JPH0810984A (en) Device for positioning tube end and flange and method for joining them
JP2002283114A (en) Boring method and boring tool
JP2003326407A (en) Inner surface machining device
JPH1148001A (en) Manufacture of hollow shaft
JP2584076Y2 (en) Hollow shaft center holding tool
JP3000538B2 (en) Work positioning device
JP2003103402A (en) Turning work method for thin cylindrical work
JP2002307220A (en) Method of machining workpiece, and printed circuit board boring machine
WO2023144954A1 (en) Chuck device equipped with phase-determining mechanism
JPH05337722A (en) Rotary tool
JPS6016333A (en) Machining method of eccentric shafts and machining jig
JP4241506B2 (en) Method for manufacturing glow plug metal shell and method for manufacturing glow plug
JP2546928Y2 (en) Centering gauge
JPS6343010Y2 (en)
JP2007038307A (en) Collet chuck and turning product manufacturing method
JP3179956B2 (en) Processing method of grooved bearing member
JP2001341002A (en) Manufacturing method and device for dynamic pressure type bearing part