JPH04336906A - Chuck for machine tool - Google Patents
Chuck for machine toolInfo
- Publication number
- JPH04336906A JPH04336906A JP3107280A JP10728091A JPH04336906A JP H04336906 A JPH04336906 A JP H04336906A JP 3107280 A JP3107280 A JP 3107280A JP 10728091 A JP10728091 A JP 10728091A JP H04336906 A JPH04336906 A JP H04336906A
- Authority
- JP
- Japan
- Prior art keywords
- chuck
- claw
- workpiece
- main
- machine tool
- 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
Links
- 210000000078 claw Anatomy 0.000 claims description 29
- 230000005489 elastic deformation Effects 0.000 abstract description 4
- 244000145845 chattering Species 0.000 abstract 1
- 238000003754 machining Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/18—Chucks with simultaneously-acting jaws, whether or not also individually adjustable pivotally movable in planes containing the axis of the chuck
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/14—Chucks with simultaneously-acting jaws, whether or not also individually adjustable involving the use of centrifugal force
- B23B31/142—To grip a tool or workpiece
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping On Spindles (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、トルクコンバータのシ
ェルのように、中心線近くにチャッキングし易い軸部を
もつと共に、加工すべき部分の直径が大きく歪み易いワ
ークを、確実かつ容易に把持できるチャックに関する。[Industrial Application Field] The present invention reliably and easily handles workpieces that have a shaft part that is easy to chuck near the center line, such as the shell of a torque converter, and that have a large diameter and are easily distorted. Regarding a grippable chuck.
【０００２】0002
【従来の技術】前記の如きワークを保持するチャックに
は、特開昭６０−１２７９０６号公報に開示された技術
があり、該技術は内側部を保持する把持爪と外側部を保
持する外爪とをレバー機構で連動させたものである。2. Description of the Related Art A chuck for holding a workpiece as described above has a technique disclosed in Japanese Patent Application Laid-Open No. 127906/1983, which consists of gripping claws that hold the inner part and outer claws that hold the outer part. These are linked by a lever mechanism.
【０００３】また、工作機械用チャックにおいて、高速
回転時に爪に作用する遠心力で該爪の把持力が減少する
のを補償するために、遠心重錘を用いて、該爪の把持力
が増加する方向に遠心力を伝達させるものも既知である
（例えば特開昭５８−１１４８１０号公報）。In addition, in machine tool chucks, in order to compensate for the decrease in the gripping force of the jaws due to centrifugal force acting on the jaws during high-speed rotation, a centrifugal weight is used to increase the gripping force of the jaws. There is also a known device that transmits centrifugal force in the direction of (for example, Japanese Patent Laid-Open No. 114810/1983).
【０００４】しかし、前記特開昭６０−１２７９０６号
公報における外爪は、内側の把持爪と機械的に連動して
いるため、連動機構が極めて複雑で高価になると共に、
ワークの寸法が若干変化しても保持できないおそれがあ
る。また前記の遠心力を利用するチャックは、外爪を有
するものではなく、中心軸部しか把持できないものであ
る。However, since the outer claw in the above-mentioned Japanese Patent Application Laid-Open No. 127906/1986 is mechanically interlocked with the inner gripping claw, the interlocking mechanism becomes extremely complicated and expensive.
Even if the dimensions of the workpiece change slightly, it may not be possible to hold it. Furthermore, the chuck that utilizes centrifugal force does not have external jaws and can only grip the central shaft.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、大径のワー
クの中心軸部を把持すると共に外周部分を自動的に把持
するための手段を得ることを課題とする。SUMMARY OF THE INVENTION An object of the present invention is to provide means for automatically gripping the central shaft portion of a large-diameter workpiece as well as its outer peripheral portion.
【０００６】[0006]
【課題を解決するための手段】前記課題の解決手段は、
回転軸に取付けられるチャック本体と、内端に把持部を
もち、チャック本体の半径方向に沿って調節自在に等間
隔で設けた複数個の主爪とを備える工作機械用チャック
において、爪部と重錘部を長手方向に離して備える外爪
と、前記爪部を主爪の端面から突出させて外爪を主爪の
外端側に枢着する支軸とを備えることを特徴とする。[Means for solving the problem] The means for solving the problem is as follows:
In a chuck for machine tools, which includes a chuck body that is attached to a rotating shaft, and a plurality of main jaws that have a gripping part at the inner end and are adjustable and provided at equal intervals along the radial direction of the chuck body, the jaw part and It is characterized by comprising an outer claw in which the weight portions are spaced apart in the longitudinal direction, and a support shaft for causing the claw portion to protrude from the end face of the main claw and pivoting the outer claw to the outer end side of the main claw.
【０００７】[0007]
【作用】前記の手段を備えるから、ワークの中心軸部を
主爪の把持面で把持して回転すると、外爪は、遠心力に
よって爪部を内向きに移動させてワークの外周部を把持
する。[Operation] Since the above-mentioned means is provided, when the central axis of the workpiece is gripped by the gripping surface of the main jaw and rotated, the outer jaw moves the jaw part inward due to centrifugal force and grips the outer circumference of the workpiece. do.
【０００８】[0008]
【実施例】以下、本発明の実施例を図面と共に説明する
。図１で１は工作機械の回転軸に取付けられるチャック
本体であり、その端面側に複数個の半径方向の溝２が等
間隔で設けられており、各溝２には前面に同心の凹凸条
を有するジョー３が挿入され、各ジョー３は、図外の常
用の作動機構によって一斉に半径方向に進退するように
なっている。Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. In Fig. 1, reference numeral 1 denotes a chuck body that is attached to the rotating shaft of a machine tool, and a plurality of radial grooves 2 are provided at equal intervals on the end face side of the chuck body, and each groove 2 has a concentric uneven groove on the front surface. The jaws 3 having a diameter are inserted, and the jaws 3 are moved forward and backward in the radial direction all at once by a commonly used operating mechanism (not shown).
【０００９】４は各ジョー３にボルト５で固定した主爪
であり、その内端に把持部６がボルト７で固定されてい
る。また該主爪４の外端には図２に示すように正面コ字
形の支持枠８が固定され、支軸９によって外爪１０が枢
着されている。該外爪１０は、前端側に内向きの爪部１
１を有し、これと長手方向に離れた後部に重錘部１２が
固定されており、バネ１３によって爪部１１が開く方向
に付勢されている。そして前記把持部６と爪部１１の把
持面は、図２に示すようにワーク外面と一致する凹円弧
面が形成されている。また、チャック本体１の中心部に
は、ワークＷの中心軸部を仮支持するホルダ１４とガイ
ド１５が取付けられている。A main claw 4 is fixed to each jaw 3 with a bolt 5, and a grip portion 6 is fixed to the inner end of the main claw with a bolt 7. Further, as shown in FIG. 2, a support frame 8 having a front U-shape is fixed to the outer end of the main claw 4, and an outer claw 10 is pivotally mounted by a support shaft 9. The outer claw 10 has an inward claw portion 1 on the front end side.
1, and a weight portion 12 is fixed to the rear portion separated from the weight portion in the longitudinal direction, and is biased by a spring 13 in a direction in which the claw portion 11 is opened. As shown in FIG. 2, the gripping surfaces of the gripping part 6 and the claw part 11 are formed with concave arcuate surfaces that coincide with the outer surface of the workpiece. Furthermore, a holder 14 and a guide 15 are attached to the center of the chuck body 1 to temporarily support the central axis of the workpiece W.
【００１０】図示のワークＷは、トルクコンバータのシ
ェルで、該シェルは、ハブ１６から軸方向にのびる中空
の中心軸１７と、半径方向に拡がる薄板状のポンプシェ
ル１８を有し、該ポンプシェル１８とコア１９の間に多
数のポンプブレード２０が溶接されている。そしてこの
シェルとタービン側のシェルとの結合を良好にするため
に、ポンプシェルの端部における外面２１、内面２２、
端面２３、コア１９の外周縁２４等の加工面を正確に切
削加工しなければならない。The illustrated workpiece W is a shell of a torque converter, and the shell has a hollow central shaft 17 extending in the axial direction from a hub 16, and a thin plate-like pump shell 18 that extends in the radial direction. A number of pump blades 20 are welded between 18 and core 19. In order to improve the coupling between this shell and the shell on the turbine side, an outer surface 21, an inner surface 22 at the end of the pump shell,
Machining surfaces such as the end face 23 and the outer peripheral edge 24 of the core 19 must be precisely cut.
【００１１】前記チャック本体１に対向して設けられる
心押し装置２６には、内部押金２７とバネ２８で弾発さ
れる外部押金２９が設けられ、内部押金２７はハブ１６
に当接し、外部押金２８はコア１９の内周縁に弾力的に
当接するようになっている。ワークＷをチャッキングす
る場合は、該ワークＷをガイド１５、ホルダ１４間に挿
入し、図外のチャック作動機構によって全部の主爪４を
一斉に内向きに動かして把持部６で中心軸１７を把持し
、更に心押部２６を前進させてワークＷを定位置に保持
する。The tailstock device 26 provided opposite to the chuck body 1 is provided with an internal presser 27 and an external presser 29 that is urged by a spring 28 .
The external pusher 28 is adapted to resiliently abut against the inner peripheral edge of the core 19. When chucking a workpiece W, the workpiece W is inserted between the guide 15 and the holder 14, and all the main jaws 4 are moved inward at the same time by a chuck operating mechanism (not shown), and the gripping part 6 moves the workpiece W to the central axis 17. , and further advances the tailstock 26 to hold the workpiece W in a fixed position.
【００１２】そしてチャック本体１を回転させれば、外
爪１０に遠心力が作用し、重錘部１２側の遠心力が爪部
１１側の遠心力よりも大きいため、外爪１０は、支軸９
を中心としてバネ１３に抗して矢印３０方向に回動し、
爪部１１でポンプシェル１８の肩部を自動的に把持する
。When the chuck body 1 is rotated, centrifugal force acts on the outer claw 10, and since the centrifugal force on the weight part 12 side is larger than the centrifugal force on the claw part 11 side, the outer claw 10 is Axis 9
rotates in the direction of arrow 30 against spring 13,
The claw portion 11 automatically grips the shoulder portion of the pump shell 18.
【００１３】このようにポンプシェル１８における外周
部近傍の加工部分２１、２２、２３、２４の近くを爪部
１１で把持するため、薄い殻体であるにも拘らず切削抵
抗による弾性変形、ビビリ振動等が阻止され、正確な加
工が可能になる。[0013] Since the parts 21, 22, 23, and 24 to be machined near the outer periphery of the pump shell 18 are gripped by the claws 11 in this way, elastic deformation and chatter due to cutting resistance occur even though the shell is thin. Vibration etc. are prevented and accurate machining is possible.
【００１４】[0014]
【発明の効果】以上のように本発明は、ワークの中心軸
を主爪で保持して回転させれば、外爪に作用する遠心力
により、ワークの外周部を自動的に把持するから、ワー
ク外周部近傍を加工する際にワークの弾性変形及びヒビ
リ振動を阻止できて正確な加工を施すことができる効果
がある。[Effects of the Invention] As described above, according to the present invention, when the central axis of the workpiece is held and rotated by the main jaws, the outer circumference of the workpiece is automatically gripped by the centrifugal force acting on the outer jaws. This has the effect of preventing elastic deformation and cracking vibrations of the workpiece when machining the vicinity of the outer periphery of the workpiece, thereby allowing accurate machining.
【００１５】そして、遠心力で自動的に把持させるから
、操作機構が不要であり、全体の機構も簡単になる利点
を有し、更にワーク外周部の把持すべき部分の外径に多
少の誤差があっても確実に把持できる効果がある。Since it is automatically gripped by centrifugal force, there is no need for an operating mechanism, which has the advantage of simplifying the overall mechanism.Furthermore, there is no need for some error in the outer diameter of the part of the outer periphery of the workpiece that should be gripped. It has the effect of being able to be held securely even if there is a problem.
【図１】 本発明の実施例の断面図[Figure 1] Cross-sectional view of an embodiment of the present invention
【図２】 主爪の正面図[Figure 2] Front view of main claw
Claims (1)
、内端に把持部をもち、チャック本体の半径方向に沿っ
て調節自在に等間隔で設けた複数個の主爪とを備える工
作機械用チャックにおいて、爪部と重錘部を長手方向に
離して備える外爪と、前記爪部を主爪の端面から突出さ
せて外爪を主爪の外端側に枢着する支軸とを備えること
を特徴とする工作機械用チャック。1. A chuck for a machine tool, comprising a chuck body attached to a rotating shaft, and a plurality of main jaws having a gripping part at the inner end and adjustable and equally spaced along the radial direction of the chuck body. , comprising an outer claw in which the claw part and the weight part are spaced apart in the longitudinal direction, and a support shaft for causing the claw part to protrude from the end surface of the main claw and pivoting the outer claw to the outer end side of the main claw. A machine tool chuck featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3107280A JPH0818165B2 (en) | 1991-05-13 | 1991-05-13 | Machine tool chuck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3107280A JPH0818165B2 (en) | 1991-05-13 | 1991-05-13 | Machine tool chuck |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04336906A true JPH04336906A (en) | 1992-11-25 |
| JPH0818165B2 JPH0818165B2 (en) | 1996-02-28 |
Family
ID=14455073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3107280A Expired - Fee Related JPH0818165B2 (en) | 1991-05-13 | 1991-05-13 | Machine tool chuck |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0818165B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58196013U (en) * | 1982-06-23 | 1983-12-27 | リョービ株式会社 | Processing holding device |
| JPH027905U (en) * | 1988-06-28 | 1990-01-18 |
-
1991
- 1991-05-13 JP JP3107280A patent/JPH0818165B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58196013U (en) * | 1982-06-23 | 1983-12-27 | リョービ株式会社 | Processing holding device |
| JPH027905U (en) * | 1988-06-28 | 1990-01-18 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0818165B2 (en) | 1996-02-28 |
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| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
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|
| R250 | Receipt of annual fees |
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| R250 | Receipt of annual fees |
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| R250 | Receipt of annual fees |
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| LAPS | Cancellation because of no payment of annual fees |