JPH11309614A - Annular work holder - Google Patents

Annular work holder

Info

Publication number
JPH11309614A
JPH11309614A JP13275698A JP13275698A JPH11309614A JP H11309614 A JPH11309614 A JP H11309614A JP 13275698 A JP13275698 A JP 13275698A JP 13275698 A JP13275698 A JP 13275698A JP H11309614 A JPH11309614 A JP H11309614A
Authority
JP
Japan
Prior art keywords
holder
piston
diameter
outer cylinder
oil
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.)
Granted
Application number
JP13275698A
Other languages
Japanese (ja)
Other versions
JP3360272B2 (en
Inventor
Atsushi Mikawa
淳 三川
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.)
Nippon Koshuha Steel Co Ltd
Original Assignee
Nippon Koshuha Steel 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 Nippon Koshuha Steel Co Ltd filed Critical Nippon Koshuha Steel Co Ltd
Priority to JP13275698A priority Critical patent/JP3360272B2/en
Publication of JPH11309614A publication Critical patent/JPH11309614A/en
Application granted granted Critical
Publication of JP3360272B2 publication Critical patent/JP3360272B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Gripping On Spindles (AREA)

Abstract

PROBLEM TO BE SOLVED: To accurately work an annular work at low cost by forming a diameter enlarging member of a thin outer cylinder part capable of enlarging the diameter thereof in the radial direction, and enlarging the diameter of the outer cylinder part while pushing a piston provided in a holder and using the diameter enlarging means. SOLUTION: An annular work A to be worked is inserted outside of an outer cylinder 3 of a holder 1 till a left end thereof abuts on a side surface of a stepped part 4. Thereafter, when a piston 7 is pushed left by the center of a machine tool while resisting the elasticity of a spring 10, the oil 14 in a recessed part 9 is flowed to a space (oil reservoir) 12 through a groove 13. With this structure, the inner pressure of the oil 14 inside of the oil reservoir 12 rises, and the outer cylinder part 3 of the holder 1 is projected in the radial direction so as to evenly pressure-contact with the inner peripheral surface of the annular work A. As a result, centering of the annular work A is accurately performed, and strongly fixed to the holder 1 without deforming the outer peripheral surface thereof.

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、金型部品などのよ
うな環状工作物を工作機械で加工する際に、これを保持
するための環状工作物用保持具に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an annular workpiece holder for holding an annular workpiece such as a mold part when the workpiece is machined by a machine tool.

【0002】[0002]

【従来の技術】保持具の外周部を張り出させ、張り出し
た外周部を環状工作物の内周面に圧接させることによ
り、正確な芯出しと環状工作物を変形させることなく保
持して、高精度に加工することができる構成としたこの
種の工作物保持装置は、実開平6−609号公報におい
て提案されている。
2. Description of the Related Art An outer peripheral portion of a holder is overhanged, and the overhanging outer peripheral portion is pressed against an inner peripheral surface of an annular workpiece to accurately center and hold the annular workpiece without being deformed. This type of workpiece holding device configured to be able to machine with high precision is proposed in Japanese Utility Model Laid-Open No. 6-609.

【0003】[0003]

【発明が解決しようとする課題】しかし、前記実開平6
−609号公報において提案されたこの工作物保持装置
は、多くの部品点数を必要としており製作が困難である
こと、保持具の外周部を張り出させる手段としてドロー
バー又は油圧装置といった駆動装置を必要としているた
め、既存の工作機械で使用するためには大がかりな改造
工事が必要となり、また改造を行った場合には従来の工
作機械と全く同様に使用することが不可能となる、とい
った諸問題点がある。
SUMMARY OF THE INVENTION
The work holding device proposed in Japanese Unexamined Patent Publication No. -609 requires a large number of parts and is difficult to manufacture, and requires a drive device such as a draw bar or a hydraulic device as a means for extending the outer peripheral portion of the holding tool. Therefore, large-scale remodeling work is necessary to use it with existing machine tools, and if remodeling is performed, it will not be possible to use it exactly like a conventional machine tool There is a point.

【0004】[0004]

【課題を解決するための手段】本発明は、上記のような
従来の問題点を解決するために成されたもので、構造が
簡単で製作が容易であり、従来使用していた工作機械に
何らの改造を加えることなく、且つ特別な駆動装置を必
要とせずに環状工作物を保持することができるものを提
供することを目的としたものであり、その要旨は、環状
工作物の内面に拡径によって当接保持する保持具であっ
て、前記拡径部材は径方向に拡径可能な薄肉の外筒部で
あり、前記保持具内に設置したピストンの押し込みと拡
径手段により前記外筒部を拡径する構成としたことを特
徴とする環状工作物用保持具にある。
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has a simple structure and is easy to manufacture. The purpose of the present invention is to provide a tool capable of holding a ring-shaped workpiece without any modification and without requiring a special driving device. A holding tool that abuts and holds by expanding the diameter, wherein the diameter-enlarging member is a thin-walled outer cylinder portion that can be expanded in the radial direction, and the outer diameter is increased by pushing a piston installed in the holding tool and expanding the diameter. An annular workpiece holder characterized in that a diameter of a cylindrical portion is increased.

【0005】[0005]

【発明の実施の形態】以下、本発明を図面に示す実施例
により詳細に説明するに、図において、1は環状工作物
Aを保持する保持具で、2は前記保持具1を図示しない
工作機械にチャッキングなどにより取り付ける基盤部で
ある。3は前記基盤部2の一端面2Aから延びた円筒形
状の外筒部で、薄肉部で構成されており、前記基盤部2
の一端面2A側には前記外筒部3との連接部における外
側に段部4が形成されている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings. In the drawings, reference numeral 1 denotes a holder for holding an annular workpiece A; It is a base unit that is attached to a machine by chucking or the like. Reference numeral 3 denotes a cylindrical outer cylinder portion extending from one end face 2A of the base portion 2 and formed of a thin portion.
A stepped portion 4 is formed on the one end surface 2A side of the outside of the connecting portion with the outer cylindrical portion 3.

【0006】5は前記外筒部3の開口部に連接した内方
折曲部で、前記外筒部3の径方向に延びており、該内方
折曲部5には前記基盤部2の一端面2A方向に延びたリ
ング状のピストン保持筒部6が連接している。7は前記
ピストン保持筒部6内に嵌挿したピストンで、その右端
部7A側で外周に装着したシールリング8を介して水密
的に且つ軸方向に摺動自在となるよう設置されており、
他方の左端部7Bは前記基盤部2の一端面2A近傍まで
延びていいる。
Reference numeral 5 denotes an inwardly bent portion connected to the opening of the outer tube portion 3 and extends in the radial direction of the outer tube portion 3. A ring-shaped piston holding cylinder 6 extending in the direction of one end face 2A is connected. Reference numeral 7 denotes a piston which is inserted into the piston holding cylinder portion 6 and is provided so as to be water-tight and axially slidable via a seal ring 8 attached to the outer periphery on the right end 7A side thereof.
The other left end 7B extends to the vicinity of one end face 2A of the base 2.

【0007】9は前記基盤部2の一端面2Aに形成した
凹部で、該凹部9内に前記ピストン7の左端部7Bが嵌
合しており、該左端部7Bの端面と前記凹部9の奥壁と
の間に介装したスプリング10により前記ピストン7が
右方向に付勢されているとゝもに、前記ピストン保持筒
部6の開口部内に装着した止め輪11により前記ピスト
ン7の抜け落ちを防いでいる。
Reference numeral 9 denotes a concave portion formed on one end surface 2A of the base portion 2. The left end portion 7B of the piston 7 is fitted into the concave portion 9, and the end surface of the left end portion 7B and the inner side of the concave portion 9 are provided. While the piston 7 is urged rightward by a spring 10 interposed between the piston and the wall, the retaining ring 11 installed in the opening of the piston holding cylinder 6 prevents the piston 7 from falling off. I'm preventing.

【0008】12は前記外筒部3の内側とピストン7の
外側との間に形成した油溜め用の空間で、前記外筒部3
の内周面のほゞ全面にわたって形成されており、前記空
間12と凹部9とは前記ピストン7の先端部(左端部7
B)外周に形成した溝13により連通している。したが
って、前記ピストン7がスプリング10の弾性に抗して
左方向に押し込まれることにより、前記凹部9内にある
油14は前記溝13を通って空間12内に流れ込み、該
空間12内にある油14の内圧が上昇する構造としてい
る。なお、図中15は前記凹部9内への油給排用孔で、
通常は止めねじ栓16により塞がれている。
Reference numeral 12 denotes an oil reservoir space formed between the inner side of the outer cylinder 3 and the outer side of the piston 7.
The space 12 and the concave portion 9 are formed at almost the entire inner peripheral surface of the piston 7, and the space 12 and the concave portion 9 are formed at the distal end (the left end 7) of the piston 7.
B) They are communicated by a groove 13 formed on the outer periphery. Therefore, when the piston 7 is pushed leftward against the elasticity of the spring 10, the oil 14 in the recess 9 flows into the space 12 through the groove 13, and the oil 14 in the space 12 14, the internal pressure is increased. In the figure, reference numeral 15 denotes an oil supply / drain hole into the recess 9;
Usually, it is closed by a set screw plug 16.

【0009】17は前記ピストン7の中心に形成した貫
通孔で、該貫通孔17内にはストロークエンドピン18
がその左方部においてねじ構造19で取り付けられてお
り、右端部側においてその外周に装着したシールリング
20を介して水密的に且つ軸方向に移動自在となるよう
設置されている。これにより、前記ピストン7の押し込
み量を自在に調整することを可能としている。
Reference numeral 17 denotes a through hole formed at the center of the piston 7, and a stroke end pin 18 is provided in the through hole 17.
Is mounted on the left side thereof with a screw structure 19, and is mounted on the right end side so as to be water-tight and axially movable via a seal ring 20 mounted on the outer periphery thereof. This makes it possible to freely adjust the pushing amount of the piston 7.

【0010】つぎに、作用を説明するに、保持具1を図
示しない工作機械に前記基盤部2の部分でチャッキング
して取り付ける。そして、この保持具1の外筒部3の外
側に、加工しようとする環状工作物Aをその左端が前記
段部4の側面と当接するまで挿入する。その後工作機械
のセンターなどにより、前記ピストン7をスプリング1
0の弾性に抗して図中左方向に押し込むと、前記凹部9
内にある油14は前記溝13を通って空間(油溜め)1
2に流れ込む。これにより、前記油溜め12内の油14
の内圧が上がり、保持具1の外筒部3が径方向に張り出
して環状工作物Aの内周面を均等に圧接する。
Next, to explain the operation, the holder 1 is attached to a machine tool (not shown) by chucking at the base portion 2. Then, the annular workpiece A to be machined is inserted outside the outer cylindrical portion 3 of the holder 1 until the left end of the annular workpiece A contacts the side surface of the step portion 4. Then, the piston 7 is moved to the spring 1 by a machine tool center or the like.
0 to the left in the figure against the elasticity of
The oil 14 in the space (oil sump) 1 passes through the groove 13.
Flow into 2. Thereby, the oil 14 in the oil reservoir 12 is
, The outer cylindrical portion 3 of the holder 1 protrudes in the radial direction, and uniformly presses the inner peripheral surface of the annular workpiece A.

【0011】その結果、環状工作物Aは正確に芯出しが
なされるとゝもに、その外周面が変形することなく前記
保持具1に強固に固定されるので、この状態で工作機械
により環状工作物Aを加工することができる。なお、前
記環状工作物Aを保持具1に固定するに際し、センター
によるピストン7の押し込み量を調節することが困難な
場合は、ストロークエンドピン18を締め込むことによ
りその先端部18Aの前記凹部9内への突出長さを大き
くすれば、ピストン7の押し込み量を容易に調節するこ
とができる。
As a result, when the annular workpiece A is accurately centered, the outer peripheral surface thereof is firmly fixed to the holder 1 without being deformed. The workpiece A can be processed. If it is difficult to adjust the pushing amount of the piston 7 by the center when fixing the annular workpiece A to the holder 1, the stroke end pin 18 is tightened to tighten the stroke end pin 18 in the concave portion 9 of the distal end portion 18A. If the length of the protrusion is large, the amount of pushing of the piston 7 can be easily adjusted.

【0012】加工終了後は、工作機械のセンターを後退
させれば、前記ピストン7はバネ10の復元力により右
方向に押し戻され、前記凹部9内にある油14の内圧が
低下するので、油溜め12内にある油14の一部は前記
溝13を通って凹部9内に流れ込む。その結果、前記油
溜め12内の油14の内圧が下がり、径方向に張り出し
ていた前記外筒部3が径方向に縮小して現状に復帰する
ので、環状工作物Aを外筒部3から抜き出すことができ
る。
After the machining, if the center of the machine tool is retracted, the piston 7 is pushed back to the right by the restoring force of the spring 10, and the internal pressure of the oil 14 in the recess 9 is reduced. Part of the oil 14 in the reservoir 12 flows into the recess 9 through the groove 13. As a result, the internal pressure of the oil 14 in the oil reservoir 12 decreases, and the outer cylindrical portion 3 that has protruded in the radial direction contracts in the radial direction and returns to the current state. Can be extracted.

【0013】[0013]

【発明の効果】本発明に係る環状工作物用保持具は、上
記のように、環状工作物の内面に拡径によって当接保持
する保持具であって、前記拡径部材は径方向に拡径可能
な薄肉の外筒部であり、前記保持具内に設置したピスト
ンの押し込みと拡径手段により前記外筒部を拡径する構
成であるから、構造が極めて簡単であり、製作が容易で
廉価に製造することができる。また駆動力は工作機械の
センターなどを利用でき、特定の駆動装置を必要としな
いので、種々の工作機械に何らの改造を施すことなく装
着することができ、利用範囲が拡大するとゝもに、環状
工作物を安価に且つ高精度に加工することができる、と
いった諸効果がある。
As described above, the holder for an annular workpiece according to the present invention is a holder for abutting and holding the inner surface of an annular workpiece by expanding the diameter, and the expanding member expands in the radial direction. It is a thin-walled outer cylinder that can be radiated, and has a configuration in which the outer cylinder is expanded by pushing a piston installed in the holder and expanding the diameter, so that the structure is extremely simple and easy to manufacture. It can be manufactured at low cost. In addition, since the driving force can use the center of the machine tool and does not require a specific driving device, it can be mounted on various machine tools without any modification, and as the use range expands, There are various effects that an annular workpiece can be machined at low cost and with high precision.

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

【図1】本発明に係る環状工作物用保持具の縦断面図で
ある。
FIG. 1 is a longitudinal sectional view of an annular workpiece holder according to the present invention.

【図2】図1のII−II線断面矢視図である。FIG. 2 is a sectional view taken along the line II-II in FIG.

【符号の説明】[Explanation of symbols]

A 環状工作物 1 保持具 2 基盤部 4 外筒部 6 ピストン保持筒部 7 ピストン 9 凹部 10 スプリング 12 油溜め用空間 13 溝 14 油 18 ストロークエンドピン Reference Signs List A annular workpiece 1 holder 2 base 4 outer cylinder 6 piston holding cylinder 7 piston 9 recess 10 spring 12 oil sump space 13 groove 14 oil 18 stroke end pin

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 環状工作物の内面に拡径によって当接保
持する保持具であって、前記拡径部材は径方向に拡径可
能な薄肉の外筒部であり、前記保持具内に設置したピス
トンの押し込みと拡径手段により前記外筒部を拡径する
構成としたことを特徴とする環状工作物用保持具。
1. A holding tool which is held in contact with an inner surface of an annular workpiece by expanding the diameter, wherein the expanding member is a thin outer cylinder portion which can be expanded in a radial direction, and is installed in the holding tool. An annular workpiece holder characterized in that the outer cylindrical portion is expanded in diameter by pushing a piston and expanding the diameter.
【請求項2】 ピストンの押し込み量を、該ピストンに
ネジ構造によって装着したストロークエンドピンにより
調整する構成としたことを特徴とする請求項1記載の環
状工作物用保持具。
2. The annular workpiece holder according to claim 1, wherein the amount of pushing of the piston is adjusted by a stroke end pin mounted on the piston by a screw structure.
【請求項3】 外筒部の拡径手段が、油圧であることを
特徴とする請求項1又は2記載の環状工作物用保持具。
3. The holder for an annular workpiece according to claim 1, wherein the diameter expanding means of the outer cylinder portion is hydraulic.
JP13275698A 1998-04-27 1998-04-27 Circular workpiece holder Expired - Fee Related JP3360272B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13275698A JP3360272B2 (en) 1998-04-27 1998-04-27 Circular workpiece holder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13275698A JP3360272B2 (en) 1998-04-27 1998-04-27 Circular workpiece holder

Publications (2)

Publication Number Publication Date
JPH11309614A true JPH11309614A (en) 1999-11-09
JP3360272B2 JP3360272B2 (en) 2002-12-24

Family

ID=15088831

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13275698A Expired - Fee Related JP3360272B2 (en) 1998-04-27 1998-04-27 Circular workpiece holder

Country Status (1)

Country Link
JP (1) JP3360272B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004112999A1 (en) * 2003-06-24 2004-12-29 Makino Milling Machine Co., Ltd. Main shaft device for machine tool
CN103817543A (en) * 2014-03-03 2014-05-28 中联重科股份有限公司 Fixture for clamping circular workpiece

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004112999A1 (en) * 2003-06-24 2004-12-29 Makino Milling Machine Co., Ltd. Main shaft device for machine tool
JPWO2004112999A1 (en) * 2003-06-24 2006-07-27 株式会社牧野フライス製作所 Machine tool spindle equipment
US7331742B2 (en) 2003-06-24 2008-02-19 Makino Milling Machine Co., Ltd. Spindle unit of machine tool
CN103817543A (en) * 2014-03-03 2014-05-28 中联重科股份有限公司 Fixture for clamping circular workpiece

Also Published As

Publication number Publication date
JP3360272B2 (en) 2002-12-24

Similar Documents

Publication Publication Date Title
KR100932874B1 (en) Tool Unclamping Device
US9676040B2 (en) Hydraulic chuck
JP4554521B2 (en) Positioning device and clamping system including the same
CN115070475A (en) Precision liquid expansion clamp
JPH07256505A (en) Flexible power chuck for lathe
JP3360272B2 (en) Circular workpiece holder
WO2005018869A1 (en) Clamp device and clamping system
JP6518762B2 (en) Fluid pressure clamp device
CN210023817U (en) Elastic positioning type gas-liquid chuck
CN210305820U (en) Automatic hold type gas-liquid chuck tightly
JP2001300803A (en) Diaphragm type chuck device
JP2545996Y2 (en) Positioning pin device
JP2600326Y2 (en) Fastening device
CN217668070U (en) Precision liquid expansion clamp
JP4532922B2 (en) Clamping device
CN110052637B (en) Elasticity location formula gas-liquid chuck
JP2510431B2 (en) Chuck
KR100586183B1 (en) Device for absorbing elasticity deformation of lathe chuck mounting in machine tool
CN214351059U (en) High-precision clamp mechanism for numerical control machine tool
JPH0319017B2 (en)
CN110052636B (en) Automatic enclasping type gas-liquid chuck
JP2002355771A (en) Seal member mounting tool
JP4119552B2 (en) Tool holder
JP2575656Y2 (en) Fluid pressure chuck device
JP2510439B2 (en) Chuck

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees