JP2005144623A - Workpiece gripping device - Google Patents

Workpiece gripping device Download PDF

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Publication number
JP2005144623A
JP2005144623A JP2003388054A JP2003388054A JP2005144623A JP 2005144623 A JP2005144623 A JP 2005144623A JP 2003388054 A JP2003388054 A JP 2003388054A JP 2003388054 A JP2003388054 A JP 2003388054A JP 2005144623 A JP2005144623 A JP 2005144623A
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chuck
gripping device
workpiece
piston
unit
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JP4267430B2 (en
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Kazukane Kunii
一金 國井
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Yamazaki Mazak Corp
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Yamazaki Mazak Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a gripping device for installing a deformed workpiece on a main spindle of a composite processing machine of a lathe system. <P>SOLUTION: This workpiece gripping device 10 has a plurality of chuck units 20 in a housing 100 for gripping a plurality of pull bolts 2 threadedly engaged with the workpiece. The chuck units 20 have a collet chuck means for clamping and unclamping the tip of the pull bolts 2, and clamp the pull bolts 2 by spring force of a spring unit. When a pressing member 120 in the housing 100 is operated in the arrow A<SB>1</SB>direction, a piston 130 moves in the arrow P<SB>1</SB>direction, and sends a hydraulic fluid in a pressure chamber 140 to the chuck unit 20 side via a passage 142. The piston in the chuck units 20 unclamps a collet chuck by receiving this hydraulic pressure. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、旋盤系の複合加工機に使用する加工物把持装置に関する。   The present invention relates to a workpiece gripping device used in a lathe-type composite processing machine.

旋盤系の複合加工機の加工物把持装置としては、通常三ッ爪チャックを使用している。ところがこの方法では、チャック爪近傍が加工できない。そこで従来より、マシニングセンタ用の油圧治具の一つとして広く知られるプルボルトを用いた加工物把持装置に着目したが、これを旋盤系の複合加工機の加工物把持装置として使用するには、主軸の高速旋回による、シールの偏りから発生する油漏れにより、把持力が保持できなくなり、加工物を放出する問題があった。   As a workpiece gripping device of a lathe-type compound processing machine, a three-jaw chuck is usually used. However, this method cannot process the vicinity of the chuck claw. Therefore, attention has been paid to a workpiece gripping device using a pull bolt, which is widely known as one of hydraulic jigs for machining centers, but in order to use it as a workpiece gripping device for a lathe-type compound processing machine, Due to the oil leakage that occurs due to the bias of the seal due to the high-speed turning, there is a problem that the gripping force cannot be maintained and the workpiece is discharged.

この種のプルボルトを使用した加工物の把持装置は、下記の特許文献に開示されている。
特開２００２−１１６３５号公報 特開平９−２８５９２５号公報 A workpiece gripping device using this type of pull bolt is disclosed in the following patent document.
JP 2002-11635 A JP-A-9-285925

本発明は、ばねを使用することで、油圧回路に不具合が生じたときにも、確実に加工物を把持する装置を提供するものである。   The present invention provides a device for reliably gripping a workpiece even when a malfunction occurs in a hydraulic circuit by using a spring.

本発明の加工物の把持装置は、加工物に螺合される複数本のプルボルトを把持するチャックユニットと、チャックユニットを支持する把持装置のハウジングを備え、チャックユニットは、プルボルトをクランプ・アンクランプするコレットチャックと、コレットチャックを閉じる方向にばね力を作用させるばねユニットと、ばね力に抗してコレットチャックを開く方向に作用させる油圧ピストンを備えるものである。
そして、把持装置のハウジングは、軸方向に移動する押圧部材と、押圧部材により押圧されるピストンと、ピストンにより押圧される作動油をチャックユニットへ送る油圧室及び作動油の通路を備える。 A workpiece gripping device according to the present invention includes a chuck unit that grips a plurality of pull bolts that are screwed to a workpiece, and a housing of a gripping device that supports the chuck unit. The chuck unit clamps and unclamps the pull bolts. A collet chuck, a spring unit that applies a spring force in a direction to close the collet chuck, and a hydraulic piston that operates in a direction to open the collet chuck against the spring force.
The housing of the gripping device includes a pressing member that moves in the axial direction, a piston that is pressed by the pressing member, a hydraulic chamber that sends hydraulic oil pressed by the piston to the chuck unit, and a hydraulic oil passage.

本発明は、以上の構成を備えることにより、プルボルトのアンクランプにのみ油圧を使用し、クランプはばねユニットのばね力を使用するので、常時機械的な力で加工物を把持する。
したがって、油圧の低下等によるクランプ力の低減等の不具合をなくして、確実な把持を達成することができる。 Since the present invention has the above-described configuration, the hydraulic pressure is used only for unclamping the pull bolt, and the clamp uses the spring force of the spring unit, so that the workpiece is always gripped by a mechanical force.
Accordingly, it is possible to eliminate the problems such as the reduction of the clamping force due to a decrease in the hydraulic pressure, and to achieve reliable gripping.

図１から図６は、本発明の加工物の把持装置の概要を示す説明図である。
加工物１は、例えば鋳物でつくられた異形の形状を有する。この加工物１の例えば４個所に加工物把持用のプルボルト２を螺合する。 1 to 6 are explanatory views showing an outline of a workpiece gripping apparatus according to the present invention.
The workpiece 1 has an irregular shape made of, for example, a casting. A pull bolt 2 for gripping a workpiece is screwed into, for example, four positions of the workpiece 1.

旋盤系の複合加工機３は、主軸４に把持装置１０を取付ける。把持装置１０は、例えば４基のチャックユニット２０を有し、加工物１に螺合されたプルボルト２をクランプする。
プルボルト２は、クランプ部２ａとねじ部２ｂを有し、ねじ部２ｂは、加工物に形成したねじ穴に螺合される。プルボルト２のクランプ部２ａは、外径方向に突出する形状を有し、把持装置のチャックユニット２０の開口部２２を通って挿入され、クランプされる。開口部２２内には、後述するコレットチャックが装備される。 A lathe-type multi-tasking machine 3 has a gripping device 10 attached to a spindle 4. The gripping device 10 has, for example, four chuck units 20 and clamps the pull bolt 2 screwed to the workpiece 1.
The pull bolt 2 has a clamp portion 2a and a screw portion 2b, and the screw portion 2b is screwed into a screw hole formed in the workpiece. The clamp 2a of the pull bolt 2 has a shape protruding in the outer diameter direction, and is inserted and clamped through the opening 22 of the chuck unit 20 of the gripping device. A collet chuck, which will be described later, is provided in the opening 22.

図７は、本発明の把持装置の構造を示す説明図である。
全体を符号１０で示す把持装置は、ハウジング１００内に押圧部材１２０を有し、押圧部材１２０は、矢印Ａ１，Ａ２に示す方向に摺動する。
押圧部材１２０に対向して取付けられるブラケット１５０の内側には、油圧室１４０が形成され、作動油が充填される。油圧室１４０内には、ピストン１３０が矢印Ｐ１，Ｐ２方向に摺動自在に挿入される。
油圧室１４０は、通路１４２を介してチャックユニット２０と連通し、チャックユニット２０に作動油を供給する。 FIG. 7 is an explanatory view showing the structure of the gripping device of the present invention.
The gripping device generally indicated by reference numeral 10 has a pressing member 120 in a housing 100, and the pressing member 120 slides in directions indicated by arrows A 1 and A 2 .
A hydraulic chamber 140 is formed inside the bracket 150 attached to face the pressing member 120 and is filled with hydraulic oil. In the hydraulic chamber 140, a piston 130 is slidably inserted in the directions of arrows P 1 and P 2 .
The hydraulic chamber 140 communicates with the chuck unit 20 through the passage 142 and supplies hydraulic oil to the chuck unit 20.

把持装置のハウジング１００の先端部は、カバー１０４で覆われる空気室１０２が設けられる。空気室１０２は、エアブローポート１０６を介してチャックユニット２０へエアを供給する。供給されたエアは、開口部２２から排気され、加工物把持用のプルボルト２の清掃を行う。   An air chamber 102 covered with a cover 104 is provided at the distal end portion of the housing 100 of the gripping device. The air chamber 102 supplies air to the chuck unit 20 via the air blow port 106. The supplied air is exhausted from the opening 22, and the pull bolt 2 for gripping the workpiece is cleaned.

図８は、チャックユニット２０の構造を示す説明図である。
チャックユニット２０は、ハウジング２００内に油圧室２１４を有し、油圧室２１４内に摺動自在に挿入されるピストン２１０を備える。油圧室２１４は、ポート２１２を介して、把持装置の油圧通路１４２に連通する。ピストン２１０を貫通して設けられるチャックロッド２２０は、先端にチャック用のボール２３０を有し、プルボルトを把持する（すなわち、ボール２３０とチャックロッド２２０は、コレットチャックを構成する）。 FIG. 8 is an explanatory view showing the structure of the chuck unit 20.
The chuck unit 20 includes a hydraulic chamber 214 in the housing 200 and includes a piston 210 that is slidably inserted into the hydraulic chamber 214. The hydraulic chamber 214 communicates with the hydraulic passage 142 of the gripping device via the port 212. The chuck rod 220 provided through the piston 210 has a chuck ball 230 at the tip, and holds a pull bolt (that is, the ball 230 and the chuck rod 220 constitute a collet chuck).

ハウジング２００の後部に設けられる支持部材２５０は、チャックロッド２２０の内側に配設されるクランプボール開放用の棒部材２６０を支持する。支持部材はばね２５２で棒部材２６０を押圧する。棒部材２６０は、スプリング２６２を介してボール２３０の開放部材２６４を押圧する。
ハウジング２００内に配設されるばねユニット２４０は、強力な押圧力でピストン２１０を油圧室２１４側に押し戻す作用を有する。 A support member 250 provided at the rear portion of the housing 200 supports a clamp ball opening bar member 260 disposed inside the chuck rod 220. The support member presses the bar member 260 with the spring 252. The bar member 260 presses the opening member 264 of the ball 230 via the spring 262.
The spring unit 240 disposed in the housing 200 has an action of pushing the piston 210 back to the hydraulic chamber 214 side with a strong pressing force.

図９は、チャックユニット２０の作動を示す説明図である。
ピストン２１０に連結されるクランプロッド２２０は、矢印Ｃ１，Ｃ２方向に摺動する。クランプロッド２２０の移動に対応して、コレットチャックの機能を有するクランプボール２３０は、部材２３２，２３４の作用によって開閉し、プルボルト２をクランプ、アンクランプする。 FIG. 9 is an explanatory view showing the operation of the chuck unit 20.
The clamp rod 220 connected to the piston 210 slides in the directions of arrows C 1 and C 2 . Corresponding to the movement of the clamp rod 220, the clamp ball 230 having a collet chuck function is opened and closed by the action of the members 232 and 234, and the pull bolt 2 is clamped and unclamped.

アンクランプ時に、プルボルト２は矢印Ｂ１，Ｂ２方向に移動自在となる。
ばねユニット２４０は、大きなばね力でピストン２１０を油圧室２１４側へ押し戻す機能を有する。 During unclamping, the pull bolt 2 is movable in the directions of arrows B 1 and B 2 .
The spring unit 240 has a function of pushing back the piston 210 toward the hydraulic chamber 214 with a large spring force.

次に、本発明の把持装置１０の作用を説明する。
図１０は、アンクランプ時の作用を示すもので、図示しない主軸側の駆動機構により、ハウジング１００内の押圧部材１２０が矢印Ａ１方向に駆動された状態を示す。押圧部材１２０が前進すると、押圧部材１２０の前部１２２はピストン１３０に当接し、ピストン１３０を矢印Ｐ１方向に押し出す。 Next, the operation of the gripping device 10 of the present invention will be described.
Figure 10 illustrates the effect of unclamping, the spindle side of a driving mechanism (not shown), showing a state where the pressing member 120 in the housing 100 is driven in the arrow A 1 direction. When the pressing member 120 moves forward, the front 122 of the pressing member 120 abuts against the piston 130 to push the piston 130 in the arrow P 1 direction.

ピストン１３０が前進すると、油圧室１４０内の作動油は押し出され、通路１４２内を矢印Ｈ１方向に流れて、チャックユニット２０側へ供給される。 When the piston 130 is advanced, the hydraulic oil in the hydraulic chamber 140 is pushed out, flows through the passage 142 in the arrow H 1 direction, is supplied to the chuck unit 20 side.

図１１，図１２は、チャックユニット２０の作用を示す把持装置１０の通路１４２から供給される作動油に、チャックユニット２０のハウジング２００のポート２１２を介して油圧室２１４へ供給される。この作動油の圧力を受けて、ピストン２１０とクランプロッド２２０は、ばねユニット２４０のばね力Ｆ１に抗して矢印Ｃ１方向に前進する。 11 and 12, the hydraulic oil supplied from the passage 142 of the gripping device 10 showing the operation of the chuck unit 20 is supplied to the hydraulic chamber 214 via the port 212 of the housing 200 of the chuck unit 20. Under the pressure of the hydraulic oil, the piston 210 and the clamp rod 220 advance in the direction of arrow C 1 against the spring force F 1 of the spring unit 240.

コレットチャックを構成するクランプロッド２２０が前進すると、クランプボール２３０はフリーとなり、プルボルト２を引き抜くことにより、クランプロッド２２０の穴２２２から外方向へ押し出される。この作用により、プルボルト２のクランプ部２ａは、クランプボール２３０の拘束から解放される。
この状態にあっては、図１２に示すように、プルボルト２を矢印Ｂ１，Ｂ２に示す方向に自由に係脱させることができる。 When the clamp rod 220 constituting the collet chuck moves forward, the clamp ball 230 becomes free and is pushed outward from the hole 222 of the clamp rod 220 by pulling out the pull bolt 2. By this action, the clamp part 2 a of the pull bolt 2 is released from the restraint of the clamp ball 230.
In this state, as shown in FIG. 12, the pull bolt 2 can be freely engaged and disengaged in the directions indicated by arrows B 1 and B 2 .

次に、プルボルト２をクランプする作用を示す。
加工物に螺合された４本のプルボルト２を、矢印Ｂ２方向に移動させて、把持装置１０のチャックユニット２０に挿入する。 Next, the action | operation which clamps the pull volt | bolt 2 is shown.
The four pull bolts 2 screwed to the workpiece are moved in the direction of arrow B 2 and inserted into the chuck unit 20 of the gripping device 10.

この状態で図１３に示すように、図示しない駆動機構を操作して、押圧部材１２０を矢印Ａ２方向へ後退させる。 As shown in FIG. 13 in this state, by operating the driving mechanism (not shown) retracts the pressing member 120 in the arrow A 2 direction.

図１４に示すように、ばねユニット２４０のばね力Ｆ１により、ピストン２１０は、圧力室２１４側へ押し戻され、ピストン２１０に連結されたクランプロッド２２０は矢印Ｃ２方向に引き戻される。 As shown in FIG. 14, by the spring force F 1 of the spring unit 240, the piston 210 is pushed back into the pressure chamber 214 side, the clamp rod 220 connected to the piston 210 is pulled back in the arrow C 2 direction.

圧力室２１４内の作動油は、ポート２１２から排出され、把持装置１０の通路１４２を矢印Ｈ２方向に流れる。この作動油は、把持装置１０のハウジング１００内の圧力室１４０に戻り、ピストン１３０を矢印Ｐ２方向に押す。
ピストン１３０は、押圧部材１２０の前面１２２に当接して、押圧部材１２０と一体に主軸側へ後退する。 Hydraulic oil in the pressure chamber 214 is discharged from the port 212, flows through the passage 142 of the gripping device 10 in the arrow H 2 direction. The hydraulic oil is returned to the pressure chamber 140 of the housing 100 of the gripping device 10, it pushes the piston 130 in the arrow P 2 direction.
The piston 130 abuts on the front surface 122 of the pressing member 120 and moves backward together with the pressing member 120 toward the main shaft side.

クランプロッド２２０が矢印Ｃ２方向へ引き戻されると、クランプボール２３０はカム部材２３２の内側のテーパ面２３２ａの作用によってクランプロッド２２０の穴２２２内に押し込まれ、プルボルト２のクランプ部２ａを把持する。 When the clamp rod 220 is pulled back in the arrow C 2 direction, clamping the ball 230 is pushed into the hole 222 of the clamp rod 220 by the action of the inner tapered surface 232a of the cam member 232 to grip the clamp portion 2a of the pull bolt 2.

以上の作用によって、プルボルト２のクランプが達成される。
本発明の把持装置は以上のように、コレットチャックを構成するチャックユニットにより加工物に螺合したプルボルトを把持する際に、クランプ力としてばねユニットのばね力を利用している。したがって、機械的な力で安定したクランプを達成することができる。
コレットチャックのアンクランプには油圧を使用し、円滑なアンクランプを達成する。 The clamp of the pull bolt 2 is achieved by the above action.
As described above, the gripping device of the present invention uses the spring force of the spring unit as a clamping force when gripping the pull bolt that is screwed into the workpiece by the chuck unit that constitutes the collet chuck. Therefore, a stable clamp can be achieved with a mechanical force.
Use hydraulic pressure to unclamp the collet chuck to achieve smooth unclamping.

本発明の概要を示す説明図Explanatory drawing which shows the outline | summary of this invention 本発明の概要を示す説明図。Explanatory drawing which shows the outline | summary of this invention. 本発明の加工物把持装置の斜視図。The perspective view of the workpiece holding apparatus of this invention. 本発明の加工物把持装置の要部の斜視図。The perspective view of the principal part of the workpiece holding apparatus of this invention. 本発明の加工物把持装置の要部の説明図。Explanatory drawing of the principal part of the workpiece holding apparatus of this invention. 本発明の加工物把持装置の要部の説明図。Explanatory drawing of the principal part of the workpiece holding apparatus of this invention. 本発明の加工物把持装置の構造を示す説明図。Explanatory drawing which shows the structure of the workpiece holding apparatus of this invention. 本発明の加工物把持装置のチャックユニットの説明図。Explanatory drawing of the chuck | zipper unit of the workpiece holding apparatus of this invention. 本発明の加工物把持装置の作用を示す説明図。Explanatory drawing which shows the effect | action of the workpiece holding apparatus of this invention. 本発明の加工物把持装置の作用を示す説明図。Explanatory drawing which shows the effect | action of the workpiece holding apparatus of this invention. 本発明の加工物把持装置の作用を示す説明図。Explanatory drawing which shows the effect | action of the workpiece holding apparatus of this invention. 本発明の加工物把持装置の作用を示す説明図。Explanatory drawing which shows the effect | action of the workpiece holding apparatus of this invention. 本発明の加工物把持装置の作用を示す説明図。Explanatory drawing which shows the effect | action of the workpiece holding apparatus of this invention. 本発明の加工物把持装置の作用を示す説明図。Explanatory drawing which shows the effect | action of the workpiece holding apparatus of this invention.

符号の説明Explanation of symbols

１ 加工物
２ プルボルト
３ 複合加工機
４ 主軸
１０ 加工物把持装置
２０ チャックユニット
１００ ハウジング
１２０ 押圧部材
１３０ ピストン
１４０ 圧力室
２００ ハウジング
２１０ ピストン
２２０ チャックロッド
２３０ ボール
２４０ ばねユニット
２６０ 棒部材 DESCRIPTION OF SYMBOLS 1 Workpiece 2 Pull bolt 3 Combined processing machine 4 Spindle 10 Workpiece gripping device 20 Chuck unit 100 Housing 120 Press member 130 Piston 140 Pressure chamber 200 Housing 210 Piston 220 Chuck rod 230 Ball 240 Spring unit 260 Bar member

Claims (2)

複合加工機の主軸に装備される加工物の把持装置であって、
加工物に螺合される複数本のプルボルトを把持するチャックユニットと、チャックユニットを支持する把持装置のハウジングを備え、
チャックユニットは、プルボルトをクランプ・アンクランプするコレットチャックと、コレットチャックを閉じる方向にばね力を作用させるばねユニットと、ばね力に抗してコレットチャックを開く方向に作用させる油圧ピストンを備える加工物把持装置。 A workpiece gripping device mounted on a spindle of a multi-tasking machine,
A chuck unit for gripping a plurality of pull bolts to be screwed onto a workpiece, and a gripping device housing for supporting the chuck unit;
The chuck unit includes a collet chuck that clamps and unclamps a pull bolt, a spring unit that applies a spring force in a direction to close the collet chuck, and a hydraulic piston that acts in a direction to open the collet chuck against the spring force. Gripping device. 把持装置のハウジングは、軸方向に移動する押圧部材と、押圧部材により押圧されるピストンと、ピストンにより押圧される作動油をチャックユニットへ送る油圧室及び作動油の通路を備える請求項１記載の加工物把持装置。   The housing of the gripping device includes a pressing member that moves in the axial direction, a piston that is pressed by the pressing member, a hydraulic chamber that sends hydraulic oil pressed by the piston to the chuck unit, and a hydraulic oil passage. Workpiece gripping device.
JP2003388054A 2003-11-18 2003-11-18 Workpiece gripping device Expired - Lifetime JP4267430B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112855652A (en) * 2019-11-28 2021-05-28 弓千有限公司 Fixed multi-cylinder chuck
CN114589642A (en) * 2022-03-02 2022-06-07 济南驷正机电设备有限公司 Clamping device for automobile automatic production line

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101914040B1 (en) * 2012-12-03 2018-11-02 두산공작기계 주식회사 Automatic claimping assembly for a boring machine

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Publication number Priority date Publication date Assignee Title
JPS5624503U (en) * 1979-08-01 1981-03-05
JPS61219547A (en) * 1985-03-23 1986-09-29 Hitachi Seiki Co Ltd Automatic work clamping device
JPH03221339A (en) * 1990-01-26 1991-09-30 Yoshida Shokai:Kk Support device of work in machine tool
JPH11333649A (en) * 1998-05-21 1999-12-07 Hitachi Seiki Co Ltd Clamp and unclamp device for pallet for machine tool
JP2003266260A (en) * 2002-03-11 2003-09-24 Erowa Ag Clamp device provided with clamp chuck

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5624503U (en) * 1979-08-01 1981-03-05
JPS61219547A (en) * 1985-03-23 1986-09-29 Hitachi Seiki Co Ltd Automatic work clamping device
JPH03221339A (en) * 1990-01-26 1991-09-30 Yoshida Shokai:Kk Support device of work in machine tool
JPH11333649A (en) * 1998-05-21 1999-12-07 Hitachi Seiki Co Ltd Clamp and unclamp device for pallet for machine tool
JP2003266260A (en) * 2002-03-11 2003-09-24 Erowa Ag Clamp device provided with clamp chuck

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112855652A (en) * 2019-11-28 2021-05-28 弓千有限公司 Fixed multi-cylinder chuck
CN114589642A (en) * 2022-03-02 2022-06-07 济南驷正机电设备有限公司 Clamping device for automobile automatic production line
CN114589642B (en) * 2022-03-02 2023-06-23 济南驷正机电设备有限公司 Clamping device for automobile automation production line

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