JPS6327921Y2 - - Google Patents

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Publication number
JPS6327921Y2
JPS6327921Y2 JP12262684U JP12262684U JPS6327921Y2 JP S6327921 Y2 JPS6327921 Y2 JP S6327921Y2 JP 12262684 U JP12262684 U JP 12262684U JP 12262684 U JP12262684 U JP 12262684U JP S6327921 Y2 JPS6327921 Y2 JP S6327921Y2
Authority
JP
Japan
Prior art keywords
center
tailstock
drill
drill holder
workpiece
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.)
Expired
Application number
JP12262684U
Other languages
Japanese (ja)
Other versions
JPS6161102U (en
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 filed Critical
Priority to JP12262684U priority Critical patent/JPS6327921Y2/ja
Publication of JPS6161102U publication Critical patent/JPS6161102U/ja
Application granted granted Critical
Publication of JPS6327921Y2 publication Critical patent/JPS6327921Y2/ja
Expired legal-status Critical Current

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  • Drilling And Boring (AREA)
  • Turning (AREA)

Description

【考案の詳細な説明】 技術分野 本考案は、施盤等の工作機械の芯押し台構造に
関する。
[Detailed Description of the Invention] Technical Field The present invention relates to a tailstock structure for a machine tool such as a lathe.

背景技術 施盤等によつて加工物(ワーク)の切削又は孔
明け加工などする場合の従来からの手順は、一方
端が主軸台に担持されたワークはその他方端を芯
押し台に担持されることとなるが、芯押し台に対
してはワークの他方端における回転中心軸位置に
係合して担持する芯押しセンタ部材(以下単にセ
ンタと称する)と、該センタが係合するためのセ
ンタ孔を加工するセンタドリルとがワークの数に
応じてその都度取り換えられる。
Background Art The conventional procedure when cutting or drilling a workpiece using a lathe, etc. is that one end of the workpiece is supported on the headstock, and the other end of the workpiece is supported on the tailstock. However, for the tailstock, there is a tailstock center member (hereinafter simply referred to as a center) that engages and supports the rotational center axis position at the other end of the workpiece, and a center that engages with the center. The center drill for drilling holes is replaced each time depending on the number of workpieces.

即ち、先端にて穿孔用センタドリルを取り付け
たドリルホルダを芯押し台にスリーブを介してテ
ーパ嵌合せしめ、主軸台の駆動でワークを回転さ
せながらセンタドリルでセンタ孔を穿つ。次い
で、センタドリルをそのホルダと共に芯押し台の
スリーブから抜き取つてセンタに交換する。ワー
クがその両端を主軸台と芯押し台側のセンタによ
つて夫々担持されると工具バイトによる切削加工
が可能となる。以下、ワークの数に応じた回数だ
けセンタドリル付ホルダとセンタの交換を繰り返
すのである。
That is, a drill holder to which a center drill for drilling is attached at its tip is tapered fitted to a tailstock via a sleeve, and a center hole is drilled with the center drill while the workpiece is rotated by the drive of the headstock. Next, the center drill and its holder are removed from the tailstock sleeve and replaced with the center drill. When the workpiece is supported at both ends by the headstock and the center on the tailstock side, cutting with a tool bit becomes possible. Thereafter, the holder with a center drill and the center are replaced a number of times depending on the number of workpieces.

このように、従来の芯押し台構造によれば、芯
押し台側のスリーブに対してドリルホルダとセン
タの交換が頻繁に行われるために、作業の能率が
低いと云つた問題がある他、経年使用よつて心押
し台側のスリーブとドリルホルダ及びセンタとの
互いのテーパ嵌合面に損傷及び摩耗などをきた
し、各部材間のテーパ嵌合精度の低下による芯出
し不良が生じてワーク加工精度に影響を及ぼして
いた。
As described above, with the conventional tailstock structure, the drill holder and center of the sleeve on the tailstock side are frequently replaced, which causes problems such as low work efficiency. Due to long-term use, the tapered fitting surfaces of the sleeve on the tailstock side, the drill holder, and the center are damaged and worn, resulting in poor centering due to a decrease in the accuracy of the taper fitting between each member, resulting in workpiece machining. It was affecting accuracy.

考案の概要 本考案は、かかる従来構造の不具合を解消すべ
くなされ、取り扱い容易にして作業能率の良い工
作機械の芯押し台構造の提供を目的としている。
Summary of the invention The present invention was made to solve the problems of the conventional structure, and aims to provide a tailstock structure for a machine tool that is easy to handle and has high work efficiency.

この目的達成のために、本考案の芯押し台構造
は、センタ孔加工用のドリルを先端に具えたドリ
ルホルダが芯押しセンタ部を取付母体としてこの
先端部にて係脱自在となされ、しかも上記ドリル
ホルダと上記心押しセンタ部材とがこれら両部材
の中心軸方向において相対的移動が可能となるよ
うに連結部材によつて連結された構成となされて
いる。
In order to achieve this objective, the tailstock structure of the present invention is such that a drill holder equipped with a drill for drilling a center hole at the tip uses the tailstock center section as a mounting base and can be freely engaged and detached at this tip section. The drill holder and the tailstock center member are connected by a connecting member so that they can move relative to each other in the direction of their central axes.

実施例 以下、本発明の実施例たる工作機械の芯押し台
構造について第1図を用いて説明する。第1図は
例えば施盤のベツド後端の上部に配設され普通テ
ールと称される部分の芯押し台構造を示してい
る。テールにおける支持部1には略円筒形のスリ
ーブ2が嵌め込まれ、該スリーブ2は開口端2a
からテール後方に向けて奥細のテーパ孔2bを有
し、図示せぬハンドルの操作で支持部1を基準に
してこの中心軸X−X線方向に摺動自在である。
Embodiment Hereinafter, a tailstock structure of a machine tool according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 shows, for example, the structure of a tailstock in a portion commonly referred to as a tail, which is disposed above the rear end of the bed of a lathe. A substantially cylindrical sleeve 2 is fitted into the support portion 1 in the tail, and the sleeve 2 has an open end 2a.
It has a tapered hole 2b which is deep and narrow toward the rear of the tail, and is slidable in the direction of the central axis X--X with the support portion 1 as a reference by operating a handle (not shown).

スリーブ2のテーパ孔2bにはセンタ3がその
後部のテーパシヤンク部3aを介して嵌合してい
る。テーパ孔2b及びテーパシヤンク部3aのテ
ーパは一般にはモールステーパとして知られてい
る。又、センタ3の最先端には円錐状の尖鋭部3
bが設けられ、該尖鋭部3bに向つて先細状のテ
ーパ軸部3cが設けられている。
A center 3 is fitted into the tapered hole 2b of the sleeve 2 via a tapered shank portion 3a at the rear thereof. The taper of the taper hole 2b and the taper shank portion 3a is generally known as a Morse taper. In addition, a conical sharp part 3 is provided at the tip of the center 3.
b, and a tapered shaft portion 3c tapered toward the sharp portion 3b.

次に、センタ3のテーパ軸部3cにはドリルホ
ルダ4が係脱自在に嵌合している。即ち、ドリル
ホルダ4にはこの後部を開口してセンタ3のテー
パ軸部3cと同様な勾配を有するテーパ盲孔4a
が穿設され、又先端においては図示せぬワークの
端部の回転中心位置にてセンタ孔を穿つためのセ
ンタドリル5が備わつている。即ち、X−X線で
示される芯押し台支持部1の中心軸線にセンタ3
とドリルホルダ4とセンタドリル5の各々中心軸
線が各部材同士のテーパ嵌合によつて一致するよ
うになつている。中心軸X−X線は図示せぬ主軸
台におけるスピンドル回転中心軸線でもある。な
お、スリーブ2はテーパシヤンク付センタ3の規
格に応じた交換部品であることは周知の通りであ
る。
Next, a drill holder 4 is removably fitted into the tapered shaft portion 3c of the center 3. That is, the drill holder 4 has a tapered blind hole 4a having a slope similar to that of the tapered shaft portion 3c of the center 3 by opening the rear portion thereof.
A center drill 5 is provided at the tip for drilling a center hole at the center of rotation of the end of the workpiece (not shown). That is, the center 3 is located at the center axis of the tailstock support 1 shown by
The center axes of the drill holder 4 and the center drill 5 are made to coincide with each other by tapered fitting of the respective members. The center axis XX line is also the center axis of rotation of the spindle in the headstock (not shown). It is well known that the sleeve 2 is a replacement part that complies with the standards for the center 3 with a taper shank.

一方、上記したセンタ3とドリルホルダ4には
これらの対面する部分の夫々にブラケツト3d,
4bが一体に膨出成形されていて、両ブラケツト
3d,4bには中心軸X−X線に平行に連結部材
であるハンガロツド6が挿通している。ハンガロ
ツド6の両端部には夫々抜止め鍔部6a,6aが
設けられ、センタ3とドリルホルダ4がハンガロ
ツド6を介して接近離間できるように相対的な移
動が可能となるように連結している。しかも、ハ
ンガロツド6の後方部にはバネ部材7が弾装さ
れ、ハンガロツド6を図面の右方向に引つ張るべ
く付勢していて、つまりセンタ3に対してドリル
ホルダ4がハンガロツド6を介して矢印A2の方
向へ引き寄せられるように付勢している。
On the other hand, the center 3 and the drill holder 4 have brackets 3d and 3d, respectively, on their facing parts.
4b is integrally bulged, and a hanger rod 6, which is a connecting member, is inserted through both brackets 3d and 4b parallel to the central axis X--X. At both ends of the hanger rod 6, retaining flanges 6a, 6a are provided, respectively, and the center 3 and the drill holder 4 are connected to each other so as to be able to move toward and away from each other via the hanger rod 6 so as to be able to move relative to each other. . Furthermore, a spring member 7 is loaded at the rear of the hanger rod 6, and biases the hanger rod 6 to pull it toward the right in the drawing. It is biased so that it is pulled in the direction of arrow A2 .

更に、センタ3のブラケツト3dには同じく中
心軸X−X線に平行に押し出しロツド8が自由に
動き得るように遊嵌状態で挿通しており、該押し
出しロツド8はこの両端が支持部1の前方開口端
1aとドリルホルダ3のブラケツト4b後端とに
夫々突き当る位置にて配設されている。
Further, an extrusion rod 8 is loosely inserted into the bracket 3d of the center 3 so that it can move freely parallel to the central axis They are arranged at positions that abut the front opening end 1a and the rear end of the bracket 4b of the drill holder 3, respectively.

かかる構成による動作並びに作用について次に
説明する。第1図において、主軸台のスピンドル
回転中心軸X−X線上にて一方端が担持されてい
るワークの他方端に向つて芯押し台全体又はスリ
ーブ2のみを矢印A1方向に前進せしめ、実線で
表わされた状態のセンタドリル5によつてワーク
他方端における回転中心位置に小さなセンタ孔を
穿設する。センタ孔が設けられたのちは、芯押し
台全体又はスリーブ2のみを矢印A2方向に後退
させる。
The operation and effect of this configuration will be explained next. In FIG. 1, the entire tailstock or only the sleeve 2 is moved forward in the direction of arrow A1 toward the other end of the workpiece whose one end is supported on the spindle rotation center axis X-X line of the headstock, and the solid line A small center hole is drilled at the center of rotation at the other end of the workpiece using the center drill 5 in the state shown in FIG. After the center hole is provided, the entire tailstock or only the sleeve 2 is moved back in the direction of arrow A2 .

次いで、用を終えたセンタドリル5を即ちこれ
を保持するドリルホルダ4をセンタ3から分離せ
しめるために、スリーブ2をハンドル操作で支持
部1内に引き込む方向の矢印A2方向に移動させ
ると、センタ3及びドリルホルダ4も一体的に移
動する。押し出しロツド8も当然にセンタ3に連
動しつつやがてその右端が支持部1の前方開口端
1aに当接して動作を止める。この間センタ3及
びドリルホルダ4をスリーブ2を介して引き込む
と、停止している押し出しロツド8の左端にドリ
ルホルダ4側のブラケツト4bが突き当たる。突
き当つて停止せしめられたドリルホルダ4は尚も
移動しつつあるセンタ3のテーパ軸部3cとの嵌
合が緩むこととなる。
Next, in order to separate the used center drill 5, that is, the drill holder 4 holding it from the center 3, the sleeve 2 is moved in the direction of arrow A2 in the direction of drawing it into the support part 1 by operating the handle. The center 3 and drill holder 4 also move together. The push-out rod 8 naturally moves in conjunction with the center 3, and eventually its right end comes into contact with the front opening end 1a of the support portion 1 and stops its operation. During this time, when the center 3 and drill holder 4 are pulled in through the sleeve 2, the bracket 4b on the drill holder 4 side abuts against the left end of the extrusion rod 8 which is stopped. The drill holder 4 that is stopped due to the collision becomes loosely fitted to the tapered shaft portion 3c of the center 3, which is still moving.

ドリルホルダ4がセンタ3から完全に抜脱した
状態から、ハンガロツド6を支点にしてドリルホ
ルダ4を手動で矢印Bの如くに略半回転させる。
この時、ドリルホルダ4はバネ部材7の弾性力に
よつてハンガロツド6を介し矢印A2方向に引き
戻され、センタ3のブラケツト3dに重なり合う
ようにして収まる。なお、かかるドリルホルダ4
の分離動作中にあつてこの坦時母体であるセンタ
3のテーパシヤンク部3aにも抜け方向への力が
作用するが、スリーブ2との嵌合力によつて抜脱
するまでには至らない。
After the drill holder 4 is completely removed from the center 3, the drill holder 4 is manually rotated approximately half a turn as shown by arrow B using the hanger rod 6 as a fulcrum.
At this time, the drill holder 4 is pulled back in the direction of arrow A2 via the hanger rod 6 by the elastic force of the spring member 7, and is accommodated in the bracket 3d of the center 3 so as to overlap. In addition, such a drill holder 4
During the separation operation, a force is applied to the tapered shank portion 3a of the center 3, which is the main body, in the direction of removal, but it does not come off due to the force of fitting with the sleeve 2.

次いで、再びハンドル操作によつてスリーブ2
を前進させセンタ3の先端尖鋭部3bをワークに
既設のセンタ係止孔に係合させてワーク他方端を
担持する。ワークの一方端は上記した如く主軸台
にチヤツクされているから、これにて両端支持さ
れたワークの例えばバイト等の切削工具による加
工が行なわれる段取りとなる。
Then, by operating the handle again, sleeve 2
is advanced, and the sharp end portion 3b of the center 3 is engaged with the existing center locking hole in the workpiece, thereby supporting the other end of the workpiece. Since one end of the workpiece is chucked to the headstock as described above, this provides a setup for machining the workpiece supported at both ends using a cutting tool such as a cutting tool.

ワークに対する所要の加工が終了すると上記動
作の逆手順を踏んで、加工済みワークと交換した
ワークに対しセンタ係止孔を設けるためにドリル
ホルダ4をセンタ3に嵌合せしめる一連の作業が
繰り返されるのである。これより明らな如く、セ
ンタ3を芯押し台側のスリーブ2から分離させる
必要はない。
When the required machining of the workpiece is completed, the steps of the above operations are reversed to repeat a series of operations in which the drill holder 4 is fitted to the center 3 in order to form a center locking hole in the workpiece replaced with the machined workpiece. It is. As is clear from this, there is no need to separate the center 3 from the sleeve 2 on the tailstock side.

考案の効果 上記したことから理解されるように、本考案の
芯押し台構造によれば、芯押しセンタ部材を取付
母体にしたドリルホルダの係脱動作のみであるか
ら、芯押しセンタ部材のスリーブに対する係脱動
作が減少し作業能率が向上する。
Effects of the Invention As can be understood from the above, according to the tailstock structure of the present invention, since only the engagement and disengagement of the drill holder with the tailstock center member as the mounting base is performed, the sleeve of the tailstock center member This reduces the number of engagement and disengagement operations and improves work efficiency.

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

第1図は本考案の実施例である工作機械の芯押
し台構造の側断面図である。 主要部分の符号の説明、1……芯押し台の支持
部、2……スリーブ、3……芯押しセンタ部材、
4……ドリルホルダ、5……センタドリル、6…
…ハンガロツド、8……押し出しロツド。
FIG. 1 is a side sectional view of a tailstock structure of a machine tool according to an embodiment of the present invention. Explanation of symbols of main parts, 1...Tailstock support part, 2...Sleeve, 3...Tailstock center member,
4...Drill holder, 5...Center drill, 6...
...Hungarian rod, 8...Extrusion rod.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 尖鋭な先端を有し且つ後端にて支持部に取り付
けられる芯押しセンタ部材と、該芯押しセンタ部
材の先端部に嵌合する盲孔を後端にて有し且つ該
盲孔中心軸線上の先端にてセンタ孔加工用のドリ
ルを担持せしめたドリルホルダと、該ドリルホル
ダと前記芯押しセンタ部材とを互いに係脱し得る
ように相対的に移動自在に連結する連結部材とを
含んでなることを特徴とする工作機械の心押し台
構造。
A tailstock center member having a sharp tip and attached to the support portion at the rear end, and a blind hole at the rear end that fits into the front end of the tailstock center member, and on the center axis of the blind hole. A drill holder that supports a drill for drilling a center hole at the tip thereof, and a connecting member that connects the drill holder and the tailstock center member so that the drill holder and the tailstock center member are relatively movable so that they can be engaged with and disengaged from each other. A tailstock structure for a machine tool characterized by:
JP12262684U 1984-08-10 1984-08-10 Expired JPS6327921Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12262684U JPS6327921Y2 (en) 1984-08-10 1984-08-10

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12262684U JPS6327921Y2 (en) 1984-08-10 1984-08-10

Publications (2)

Publication Number Publication Date
JPS6161102U JPS6161102U (en) 1986-04-24
JPS6327921Y2 true JPS6327921Y2 (en) 1988-07-28

Family

ID=30681382

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12262684U Expired JPS6327921Y2 (en) 1984-08-10 1984-08-10

Country Status (1)

Country Link
JP (1) JPS6327921Y2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4563688B2 (en) * 2004-01-16 2010-10-13 株式会社リコー Rotation center, pressing force control device, lathe

Also Published As

Publication number Publication date
JPS6161102U (en) 1986-04-24

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