JPH05138411A - Attachment supporting mechanism - Google Patents

Attachment supporting mechanism

Info

Publication number
JPH05138411A
JPH05138411A JP32823391A JP32823391A JPH05138411A JP H05138411 A JPH05138411 A JP H05138411A JP 32823391 A JP32823391 A JP 32823391A JP 32823391 A JP32823391 A JP 32823391A JP H05138411 A JPH05138411 A JP H05138411A
Authority
JP
Japan
Prior art keywords
attachment
main shaft
spindle
tool
shaft
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
JP32823391A
Other languages
Japanese (ja)
Other versions
JP2731992B2 (en
Inventor
Seiji Furuhashi
静児 古橋
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.)
Okuma Corp
Original Assignee
Okuma Machinery Works 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 Okuma Machinery Works Ltd filed Critical Okuma Machinery Works Ltd
Priority to JP3328233A priority Critical patent/JP2731992B2/en
Publication of JPH05138411A publication Critical patent/JPH05138411A/en
Application granted granted Critical
Publication of JP2731992B2 publication Critical patent/JP2731992B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Gripping On Spindles (AREA)
  • Jigs For Machine Tools (AREA)
  • Machine Tool Positioning Apparatuses (AREA)

Abstract

PURPOSE:To simplify a mechanism which supports an attachment, and moreover make it capable or performing indexing irrespective of the position where a main shaft ram stations itself when the attachment to be mounted on the main shaft ram having a machinery main shaft dedicated for driving of the main shaft of the attachment is made in an unclamp state to perform automatic indexing. CONSTITUTION:A supporting tube having a collar part 13a is provided on the upper end of an attachment 6 that is pulled into the lower end of a main shaft ram 1 by a hydraulic cylinder 3 and clamped, a collet 15 that engages with the collar part 15a is provided at the top end of a tool unclamp shaft 14 fitted into the center hole of a machinery main shaft 2, and a means that prevents lowering of this tool unclamp shaft as occasion arises is provided at the upper end of the main shaft ram. And, when clamp of the attachment is released by the hydraulic cylinder 3 for turning of the attachment, the collar pad 13a abuts the claw of the collet, and the attachment is hung down and becomes in the state wherein it can perform indexing by the machinery main shaft.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、マシニングセンタ等工
作機械のアタッチメント自動割出しのため、アタッチメ
ントをアンクランプ状態にした時のアタッチメントを支
持する機構に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for supporting an attachment when it is in an unclamped state for automatic indexing of a machine tool such as a machining center.

【0002】[0002]

【従来の技術】マシニングセンタにおいて、アタッチメ
ント主軸駆動専用のテーパ穴のない本機主軸を、回転可
能に支承する主軸頭又は主軸ラムに装着されるアタッチ
メントを自動割出しする際、アタッチメントの主軸頭又
は主軸ラムに対するクランプを解除した時に、アタッチ
メントを支持する機構が必要である。従来このアタッチ
メント支持機構は、図4に示すようにテーブル等に設け
た支え101によりアタッチメント102の鍔部端面を
支える方法と、図5に示すように主軸頭又は主軸ラムの
下端部に油圧シリンダにより半径方向に出し入れ可能な
駒を有する支持装置103を設けて、アタッチメント1
04上端部の溝に駒を係合させてアタッチメントを支持
する方法が多く採用されている。
2. Description of the Related Art In a machining center, when automatically indexing an attachment to be mounted on a spindle head or spindle ram that rotatably supports a spindle of this machine without a tapered hole for driving the attachment spindle, the spindle head or spindle of the attachment A mechanism is needed to support the attachment when the clamp on the ram is released. Conventionally, this attachment support mechanism uses a method of supporting the flange end face of the attachment 102 by a support 101 provided on a table or the like as shown in FIG. 4, and a hydraulic cylinder at the lower end of the spindle head or spindle ram as shown in FIG. The attachment device 1 is provided with a support device 103 having a piece that can be taken in and out in the radial direction.
04 A method is often employed in which a piece is engaged with a groove at the upper end to support the attachment.

【0003】[0003]

【発明が解決しようとする課題】従来の技術で述べた前
者は、割出し時に主軸頭又は主軸ラムを支えのある位置
まで移動させねばならず、動作シーケンスが多くなって
大変面倒で非能率であるという問題点を有し、後者は支
持機構が主軸頭又は主軸ラムの下側にあるため、通常で
も複雑な構造が集中するこの部分を、更に複雑にすると
いう問題点を有している。本発明は、従来の技術の有す
るこのような問題点に鑑みなされたものであり、その目
的とするところは、工具アンクランプ軸を利用してアタ
ッチメントを支持することにより構造が簡単で、主軸頭
又は主軸ラムがどの位置にあっても割出し動作が可能な
アタッチメント支持機構を提供しようとするものであ
る。
In the former case described in the prior art, the spindle head or the spindle ram must be moved to a supporting position at the time of indexing, resulting in a large number of operation sequences, which is very troublesome and inefficient. The latter has the problem of further complicating this part, where normally complex structures are concentrated, because the support mechanism is below the spindle head or spindle ram. The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to simplify the structure by supporting the attachment using a tool unclamp shaft, and to reduce the spindle head. Alternatively, the present invention intends to provide an attachment supporting mechanism capable of performing an indexing operation regardless of the position of the spindle ram.

【0004】[0004]

【課題を解決するための手段】上記目的を達成するため
に、本発明におけるアタッチメント支持機構は、アタッ
チメント主軸駆動専用の先端にテーパ穴がない本機主軸
を回転可能に支承する主軸頭又は主軸ラムに装着される
アタッチメントを自動割出しのためアンクランプ状態に
した時の支持機構であって、前記アタッチメントの上端
に鍔部を有する支持筒を設け、前記本機主軸の中心穴に
軸方向移動可能に嵌挿される工具アンクランプ軸の先端
に前記鍔部に係合され前記工具アンクランプ軸が下側へ
移動時以外閉状態にコレットを設け、前記工具アンクラ
ンプ軸の前記下側への移動を必要に応じて阻止する手段
を設けてなり、工具アンクランプ軸下端のコレットにて
アタッチメントを吊り下げるようにしたものである。
In order to achieve the above object, an attachment supporting mechanism according to the present invention comprises a spindle head or a spindle ram for rotatably supporting a spindle of this machine, which has no tapered hole at its tip dedicated to driving the attachment spindle. It is a support mechanism when the attachment to be attached to is unclamped for automatic indexing, and a support cylinder with a flange is provided at the upper end of the attachment, and it is axially movable in the center hole of the main spindle of the machine. The tool unclamp shaft is inserted into the front end of the tool unclamp shaft is provided with a collet in a closed state except when the tool unclamp shaft is moved downward and the tool unclamp shaft is moved downward. A means for preventing the attachment is provided if necessary, and the attachment is suspended by the collet at the lower end of the tool unclamp shaft.

【0005】[0005]

【作用】アタッチメントの割出しに際しては、先ず工具
アンクランプ軸が下降できないように阻止して、主軸頭
又は主軸ラムに対するアタッチメントのクランプを解除
すると、アタッチメントが自重で下がり、支持筒の鍔部
が工具アンクランプ軸下端のコレットの爪と当接して、
吊り下げられた状態となり、本機主軸によるアタッチメ
ントの旋回が可能となる。
When the attachment is indexed, first the tool unclamp shaft is blocked so that it cannot be lowered, and the attachment clamp is released from the spindle head or spindle ram. Abut the collet claw at the bottom of the unclamp shaft,
It will be in a suspended state, and the attachment spindle can be turned by the main unit spindle.

【0006】[0006]

【実施例】実施例について図1〜図3を参照して説明す
る。たて形マシニングセンタの主軸ラム1に、アタッチ
メント主軸駆動専用の本機主軸2が回転可能に軸承され
ており、主軸ラム1の下端にアタッチメント取付用油圧
シリンダ3が固着されている。油圧シリンダ3に嵌挿さ
れるピストン4と一体の中空のピストンロッド5は下端
に内周鍔5aを有し、この鍔5aに円周上等分割にアタ
ッチメント挿入用切欠き溝が設けられている。一方アタ
ッチメント6には本機主軸2とクラッチにて係脱自在に
連結されるアタッチメント主軸7が回転可能に軸承され
ており、アタッチメント主軸7の中心穴に工具引上げ軸
8が軸方向移動可能に嵌挿されている。この工具引上げ
軸8は皿ばね9により常時引上げ勝手に付勢され、下端
に工具のプルスタッドを把持する図示しないコレットが
取付けられている。
EXAMPLES Examples will be described with reference to FIGS. A main spindle 2 of the vertical machining center is rotatably supported by a main spindle 2 for driving the attachment main spindle, and an attachment hydraulic cylinder 3 is fixed to the lower end of the main spindle ram 1. A hollow piston rod 5 integrated with the piston 4 fitted in the hydraulic cylinder 3 has an inner peripheral flange 5a at its lower end, and this flange 5a is provided with notch grooves for attachment insertion in a circumferentially equally divided manner. On the other hand, an attachment spindle 7, which is connected to the main spindle 2 of the machine by a clutch, is rotatably supported on the attachment 6, and a tool pull-up shaft 8 is axially movable in a central hole of the attachment spindle 7. Has been inserted. The tool pulling shaft 8 is constantly biased by a disc spring 9 and is attached to the lower end thereof with a collet (not shown) for holding a pull stud of the tool.

【0007】アタッチメント本体10の鍔部10a上端
面には外側に、外周に等分割の溝を有する溝付リング1
1が、また内側にクラウン歯形状のクラッチ12Aが同
心に固着されており、主軸ラム1のクラッチ12A対応
位置に同形のクラッチ12Bが固着されている。更にア
タッチメント本体10の上端にはセレーション16が固
着されており、アタッチメント主軸7にはこのセレーシ
ョン16とかけ外し自由に係合するギヤー17が設けら
れている。アタッチメント主軸7の上端には鍔部13a
を有する支持筒13が同心に固着されており、本機主軸
2の中心穴に軸方向移動可能に嵌挿される工具クランプ
軸14の下端に、鍔部13aと係合してアタッチメント
を支持するコレット15が開閉可能に設けられている。
A grooved ring 1 having grooves on the outer periphery of the attachment body 10 on the upper end surface of the collar portion 10a, which are equally divided on the outer circumference.
1, a crown tooth-shaped clutch 12A is concentrically fixed to the inside, and a same-shaped clutch 12B is fixed to the main shaft ram 1 at a position corresponding to the clutch 12A. Further, a serration 16 is fixedly attached to the upper end of the attachment body 10, and a gear 17 is provided on the attachment main shaft 7 so as to freely engage with and disengage from the serration 16. A collar 13a is provided on the upper end of the attachment spindle 7.
A support cylinder 13 having a core is fixed concentrically, and a collet that engages with the collar portion 13a and supports the attachment at the lower end of the tool clamp shaft 14 that is inserted into the center hole of the main shaft 2 of the machine so as to be axially movable. 15 is provided so that it can be opened and closed.

【0008】主軸ラム1の上端面には図2に示すように
取付台18を介して油圧シリンダ19が本機主軸と同心
に立設されている。そして工具アンクランプ軸14の上
端部が、この取付台18内に軸方向移動のみ可能に嵌挿
される軸受ハウジング21に、軸受22を介して回転可
能に支持されており、軸受ハウジング21は底面の一部
が斜めに切欠かれた傾斜面21aを有している。更に主
軸ラム上端面には油圧シリンダ22が水平かつ傾斜面2
1a側を向いて固着されており、この油圧シリンダ22
のピストンロッド先端に取付台18の横穴18a内に挿
通されるブロック23が固着され、このブロック23に
は軸受ハウジングの傾斜面21a及び下面に当接するロ
ーラ24が回転可能に設けられている。そして油圧シリ
ンダ19のピストン25と一体のピストンロッド26
は、上限の移動端位置にあるとき下端が工具アンクラン
プ軸14上端に隙間を有して対向しており、ブロック2
3後退時のみ下降可能で、ブロック前進時には下降でき
ないようになっている。更に油圧シリンダ19の上端面
には動作確認用リミットスイッチLS1が固着されてお
り、ピストンロッド26上端にドッグ27が取付けられ
ている。
As shown in FIG. 2, a hydraulic cylinder 19 is erected on the upper end surface of the main spindle ram 1 concentrically with the main spindle of the machine via a mount 18. The upper end of the tool unclamp shaft 14 is rotatably supported via a bearing 22 in a bearing housing 21 that is fitted in the mount 18 so as to be movable only in the axial direction. A part thereof has an inclined surface 21a which is obliquely cut out. Furthermore, the hydraulic cylinder 22 is horizontal and has an inclined surface 2 on the upper end surface of the spindle ram.
The hydraulic cylinder 22 is fixed so as to face the 1a side.
A block 23 that is inserted into the lateral hole 18a of the mount 18 is fixed to the tip of the piston rod, and a roller 24 that comes into contact with the inclined surface 21a and the lower surface of the bearing housing is rotatably provided in this block 23. And a piston rod 26 integrated with the piston 25 of the hydraulic cylinder 19.
Has a lower end facing the upper end of the tool unclamp shaft 14 with a gap at the upper limit moving end position.
3 It is possible to descend only when moving backward and not when moving forward. Further, an operation confirmation limit switch LS1 is fixed to the upper end surface of the hydraulic cylinder 19, and a dog 27 is attached to the upper end of the piston rod 26.

【0009】続いて本実施例の作用について説明する。
通常、アタッチメント割出時以外は、油圧シリンダ22
の前室に圧油が供給されてブロック23が後退してお
り、工具アンクランプ軸14の下端は、工具引上げ軸8
の上端に当接した状態とされ、工具は皿ばね9により工
具引上げ軸8先端のコレットにより引上げられてアタッ
チメント主軸7のテーパ穴に装着されている。そしてこ
の工具を取外すときは、油圧シリンダ19の上室に圧油
を供給してピストンロッド26を下降させ、ピストンロ
ッド26下端で工具アンクランプ軸14,工具引上げ軸
8を、皿ばね9の力に抗して押し下げ、工具引上げ軸8
下端の図示しないコレットが開き、同時に工具引上げ軸
8の下端で僅かに工具を押し出して取外す。
Next, the operation of this embodiment will be described.
Normally, except when indexing attachments, hydraulic cylinder 22
The pressure oil is supplied to the front chamber of the tool block 23 and the block 23 is retracted. The lower end of the tool unclamp shaft 14 is
The tool is pulled up by the collet at the tip of the tool pulling shaft 8 by the disc spring 9 and mounted in the tapered hole of the attachment spindle 7. When removing this tool, pressure oil is supplied to the upper chamber of the hydraulic cylinder 19 to lower the piston rod 26, and at the lower end of the piston rod 26, the tool unclamp shaft 14, the tool pull-up shaft 8 and the force of the disc spring 9 are applied. Push down against the tool and pull up tool axis 8
The collet (not shown) at the lower end opens, and at the same time, the tool is slightly pushed out by the lower end of the tool pull-up shaft 8 and removed.

【0010】アタッチメント6の旋回割出しを行うとき
は、油圧シリンダ22の後室に圧油を供給して、ブロッ
ク23を押し出し、軸受ハウジング22を僅かに押し上
げて工具アンクランプ軸14の下降を阻止したのち、油
圧シリンダ3の上室に圧油が供給されてピストンロッド
5が下降すると、アタッチメント6も自重で下降し、支
持筒13の鍔部13aがコレットの爪に当接して吊り下
げられ、同時にクラッチ12Aが12Bから離れ、更に
セレーション16がギヤー17と噛合して、本機主軸2
の回転によりアタッチメント6の旋回が可能となる。次
いで本機主軸2がプログラム指定角度旋回されて、アタ
ッチメント6が割出されたあと、油圧シリンダ3の下室
に圧油が供給されて、ピストンロッド5が上昇し、アタ
ッチメント6が引上げられてクラッチ12Aが12Bに
圧接されて位置決めとクランプが行われ、同時にセレー
ション16がギヤー17から外れてアタッチメント主軸
7の回転が自由となる。
When the attachment 6 is pivotally indexed, pressure oil is supplied to the rear chamber of the hydraulic cylinder 22 to push out the block 23 and push up the bearing housing 22 slightly to prevent the tool unclamp shaft 14 from descending. After that, when pressure oil is supplied to the upper chamber of the hydraulic cylinder 3 and the piston rod 5 descends, the attachment 6 also descends by its own weight, and the collar portion 13a of the support cylinder 13 abuts against the claw of the collet and is suspended. At the same time, the clutch 12A separates from 12B, and the serration 16 meshes with the gear 17, so that the main shaft 2
The attachment 6 can be turned by rotating the. Next, the main shaft 2 of the machine is rotated by a program-designated angle, the attachment 6 is indexed, pressure oil is supplied to the lower chamber of the hydraulic cylinder 3, the piston rod 5 rises, and the attachment 6 is pulled up to the clutch. 12A is pressed against 12B for positioning and clamping, and at the same time, the serration 16 is disengaged from the gear 17 and the attachment spindle 7 is free to rotate.

【0011】[0011]

【発明の効果】本発明は上述のとおり構成されているの
で、次に記載する効果を奏する。割出し動作時にアタッ
チメント上端の支持筒の鍔部を、下降を阻止した状態の
工具アンクランプ軸下端のコレットで支持して、アタッ
チメントを支持するようにしたので、主軸頭又は主軸ラ
ムがどの位置にあってもアタッチメントの割出しが可能
となる。また工具アンクランプ軸の下降阻止手段を主軸
ラム上端に設けたので、主軸ラム下部に大掛かりな装置
が不要となり、安定した割出し動作が可能となる。更に
工具アンクランプ軸を利用してアタッチメントを吊り下
げるようにしたので、構造が簡素となりそれだけ安価な
装置となる。
Since the present invention is configured as described above, it has the following effects. At the time of indexing operation, the collar of the support cylinder at the upper end of the attachment is supported by the collet at the lower end of the tool unclamp shaft in the state where it is prevented from descending to support the attachment. Even if there is, it is possible to index the attachment. Further, since the tool unclamp shaft lowering prevention means is provided at the upper end of the main spindle ram, a large-scale device is not required below the main spindle ram, and stable indexing operation is possible. Further, since the attachment is hung by using the tool unclamp shaft, the structure is simple and the device is inexpensive accordingly.

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

【図1】本実施例のアタッチメント支持機構の断面図で
下側のみを表す図である。
FIG. 1 is a cross-sectional view of an attachment support mechanism of this embodiment showing only the lower side.

【図2】本実施例のアタッチメント支持機構の断面図で
上側のみを表す図である。
FIG. 2 is a cross-sectional view of the attachment support mechanism of this embodiment showing only the upper side.

【図3】図2のA−A線視断面図である。3 is a cross-sectional view taken along the line AA of FIG.

【図4】従来の技術のテーブル上の支えを用いてアタッ
チメントを支持する機構の説明図である。
FIG. 4 is an explanatory view of a mechanism for supporting an attachment using a support on a table according to the related art.

【図5】従来の技術の主軸ラム下側に設けたアタッチメ
ント支持機構の説明図である。
FIG. 5 is an explanatory view of an attachment support mechanism provided on a lower side of a spindle ram according to a conventional technique.

【符号の説明】[Explanation of symbols]

1 主軸ラム 2 本
機主軸 3,19,22 油圧シリンダ 6 ア
タッチメント 7 アタッチメント主軸 8 工
具引上げ軸 10 アタッチメント本体 13
支持筒 13a 鍔部 14
工具アンクランプ軸 15 コレット
1 main spindle ram 2 main spindle 3,19,22 hydraulic cylinder 6 attachment 7 attachment main spindle 8 tool lifting shaft 10 attachment main body 13
Support tube 13a Collar part 14
Tool unclamp shaft 15 collet

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 アタッチメント主軸駆動専用の先端にテ
ーパ穴がない本機主軸を回転可能に支承する主軸頭又は
主軸ラムに装着されるアタッチメントを自動割出しのた
めアンクランプ状態にした時の支持機構であって、前記
アタッチメントの上端に鍔部を有する支持筒を設け、前
記本機主軸の中心穴に軸方向移動可能に嵌挿される工具
アンクランプ軸の先端に前記鍔部に係合され前記工具ア
ンクランプ軸が下側へ移動された時以外閉状態にコレッ
トを設け、前記工具アンクランプ軸の前記下側への移動
を必要に応じて阻止する手段を設けてなり、工具アンク
ランプ軸下端のコレットにてアタッチメントを吊り下げ
るようにしたことを特徴とするアタッチメント支持機
構。
1. A support mechanism when an attachment mounted on a spindle head or a spindle ram that rotatably supports a spindle of this machine, which does not have a taper hole at a tip dedicated to driving the attachment spindle, is unclamped for automatic indexing. And a support cylinder having a collar portion is provided at the upper end of the attachment, and the tool is engaged with the collar portion at the tip of a tool unclamp shaft that is axially movably fitted into a central hole of the main shaft of the machine. A collet is provided in a closed state except when the unclamp shaft is moved downward, and means for blocking the downward movement of the tool unclamp shaft is provided as necessary. Attachment support mechanism characterized in that the attachment is suspended by a collet.
JP3328233A 1991-11-15 1991-11-15 attachment Expired - Lifetime JP2731992B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3328233A JP2731992B2 (en) 1991-11-15 1991-11-15 attachment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3328233A JP2731992B2 (en) 1991-11-15 1991-11-15 attachment

Publications (2)

Publication Number Publication Date
JPH05138411A true JPH05138411A (en) 1993-06-01
JP2731992B2 JP2731992B2 (en) 1998-03-25

Family

ID=18207933

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3328233A Expired - Lifetime JP2731992B2 (en) 1991-11-15 1991-11-15 attachment

Country Status (1)

Country Link
JP (1) JP2731992B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011030432A1 (en) * 2009-09-10 2011-03-17 ヤマザキマザック株式会社 Attachment unit for machining of five surfaces
US8007213B2 (en) 2007-02-15 2011-08-30 Mitsubishi Heavy Industries, Ltd. Attachment for machine tool

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5915768A (en) * 1982-07-19 1984-01-26 株式会社東芝 Refrigeration cycle
JPS6278122A (en) * 1985-09-30 1987-04-10 Matsushita Electric Ind Co Ltd Forming of glass lens

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5915768A (en) * 1982-07-19 1984-01-26 株式会社東芝 Refrigeration cycle
JPS6278122A (en) * 1985-09-30 1987-04-10 Matsushita Electric Ind Co Ltd Forming of glass lens

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8007213B2 (en) 2007-02-15 2011-08-30 Mitsubishi Heavy Industries, Ltd. Attachment for machine tool
WO2011030432A1 (en) * 2009-09-10 2011-03-17 ヤマザキマザック株式会社 Attachment unit for machining of five surfaces
US8061939B2 (en) 2009-09-10 2011-11-22 Yamazaki Mazak Corporation Attachment unit for five-face machining

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