JP2004255491A - Opposed 2-spindle lathe - Google Patents

Opposed 2-spindle lathe Download PDF

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Publication number
JP2004255491A
JP2004255491A JP2003047208A JP2003047208A JP2004255491A JP 2004255491 A JP2004255491 A JP 2004255491A JP 2003047208 A JP2003047208 A JP 2003047208A JP 2003047208 A JP2003047208 A JP 2003047208A JP 2004255491 A JP2004255491 A JP 2004255491A
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JP
Japan
Prior art keywords
spindle
work
tailstock
opposed
gripping means
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.)
Withdrawn
Application number
JP2003047208A
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Japanese (ja)
Inventor
Katsushi Kanehira
克史 金平
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.)
Takamatsu Machinery Co Ltd
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Takamatsu Machinery 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
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Priority to JP2003047208A priority Critical patent/JP2004255491A/en
Publication of JP2004255491A publication Critical patent/JP2004255491A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To use an opposed 2-spindle lathe, respectively attaching work gripping means to opposed end portions of a first main spindle and a second main spindle, also for a tailstock machining lathe equipped with a tailstock device. <P>SOLUTION: In the opposed 2-spindle lathe, the work gripping means 8, 9 are respectively attached to the opposed end portions of the first main spindle 2 and the second main spindle 4 that are concentrically disposed and independently driven to rotate. At least the second main spindle 4 is supported so as to reciprocate in an axial direction. On the second main spindle 4, the work gripping means 9 and a work tailstock tool 20 are selectively attached. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、同心状に配置されてそれぞれ回転駆動可能な第一主軸と第二主軸の各対向端部にワーク把持手段が取り付けられた対向2スピンドル旋盤に関するものである。
【0002】
【従来の技術】
第一主軸と第二主軸の各対向端部にワーク把持手段が取り付けられた対向2スピンドル旋盤は、一般に背面加工用旋盤とも称されるもので、その基本的な構成は、特許文献1や特許文献2に記載のように従来周知のものであり、軸方向長さの比較的短いワークの背面側(内端側)を第一主軸端のワーク把持手段に把持させた状態で回転駆動して当該ワークの表面側(外端側)を併設の刃物台の工具で加工したり、当該ワークの表面側(外端側)を第二主軸端のワーク把持手段に把持させた状態で回転駆動して当該ワークの背面側(内端側)を併設の刃物台の工具で加工したりすることが出来るものであるが、この対向2スピンドル旋盤は、軸方向長さの比較的長い長尺ワークのセンター押し加工に供することが出来ない。
【0003】
【特許文献1】
実開昭61−78508号公報
【特許文献2】
特開2000−59301号公報
【0004】
即ち従来は、軸方向長さの比較的短いワークの表裏両面の加工には、第二主軸側を背面加工装置とする対向2スピンドル旋盤が使用され、軸方向長さの比較的長い長尺ワークのセンター押し加工には、前記第二主軸に代えてテールストック装置と称される心押し台が装備されたテールストック(心押し台)付き旋盤が使用されており、被加工ワークやその加工方法に応じて二種類の旋盤を使い分ける必要があった。そこで、前記対向2スピンドル旋盤の第二主軸側(背面加工装置)を軸方向と直角に横動可能とし、この第二主軸側を横動させた跡に第一主軸に対向させて心押し加工用のテールストック装置を追加設置させる方法も考えられたが、装置全体が大型になるだけでなく大幅なコストアップは免れなかった。
【0005】
【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消し得る対向スピンドル旋盤を提供することを目的とするものであって、その手段を後述する実施形態の参照符号を付して示すと、同心状に配置されてそれぞれ回転駆動可能な第一主軸2と第二主軸4の各対向端部にワーク把持手段8,9が取り付けられ、少なくとも第二主軸4はその軸心方向に往復移動自在に支持された対向2スピンドル旋盤に於いて、前記第二主軸4には、前記ワーク把持手段9とワーク心押し工具20とが択一的に取り付け可能に構成されている。
【0006】
上記構成の本発明を実施する場合、前記第二主軸4にワーク把持手段9の開閉駆動用押し引き操作部材(スリーブ14)が同心状に内装されているときは、前記ワーク心押し工具20は、前記第二主軸4の端部に着脱自在なテールフランジ17に対し軸心方向一定範囲内で移動自在なクイルジョイント18に内嵌固定し、前記クイルジョイント18と前記押し引き操作部材(スリーブ14)とを連結可能に構成することが出来る。
【0007】
【発明の実施の形態】
以下に本発明の好適実施形態を添付図に基づいて説明すると、図1に於いて、1は第一主軸2を備えた第一主軸台、3は第二主軸4を備えた第二主軸台、5は刃物台である。第一主軸台1は基台6上に固定され、第二主軸台3は、その第二主軸4が第一主軸2と同心状に対向し且つその主軸軸心方向(左右方向Z)に往復移動可能に基台6上に設置されている。刃物台5は、基台6に対し主軸軸心方向(左右方向Z)とこれに対し直交する前後方向Xとに移動可能で且つ基台6に対し垂直方向Yに昇降可能なもので、主軸軸心方向(左右方向Z)と平行な軸心の周りに回転可能な工具支持具(タレット)7を備えている。尚、刃物台5は、垂直方向Yの昇降移動が出来ないものであっても良い。
【0008】
第一主軸台1の第一主軸2及び第二主軸台3の第二主軸4には、互いに同心状に対向する内端部にチャックやコレット等のワーク把持手段8,9が着脱自在に取り付けられ、外端側には、これら各主軸2,4に回転力を伝達する受動プーリー10,11と、ワーク把持手段8,9を開閉駆動するチャッキングシリンダー12,13とが連設されている。尚、図では受動プーリー10,11を介して各主軸2,4を回転駆動する駆動手段(モーター等)は図示省略している。これら第一主軸台1、第二主軸台3、及び刃物台5の構成は、従来のこの種の対向2スピンドル旋盤と同一であるから、より詳細な説明は省略する。
【0009】
第二主軸4に対するワーク把持手段9の取り付け構造を説明すると、図2A及び図3に示すように、第二主軸4は円筒状のもので、内端にはワーク把持手段取り付けのためのフランジ部4aが連設され、内部にはチャッキングシリンダー13によって軸心方向に押し引き駆動されるスリーブ14が内装されている。ワーク把持手段9は、前記フランジ部4aに取付用ボルト15で同心状に取り付けられると共に、当該ワーク把持手段9に於けるワーク把持用爪9aの開閉駆動部と前記スリーブ14の先端とが円筒状のドローバー16でネジ結合され、チャッキングシリンダー13によってスリーブ14を押し引き駆動することによりワーク把持用爪9aが開閉される。
【0010】
図1Bは、上記構成の対向2スピンドル旋盤に於ける第二主軸4にワーク把持手段9に代えてテールフランジ17を取り付け、第二主軸台3をテールストック装置相当に変更した状態を示している。テールフランジ17は、図2B及び図4に示すように、内部にクイルジョイント18が周り止めボルト18aにより軸心方向一定範囲内で摺動自在に嵌装されており、当該クイルジョイント18の内端を第二主軸4側のスリーブ14の先端にネジ結合した状態でテールフランジ17を第二主軸4のフランジ部4aに取付用ボルト19で同心状に取り付けられ、クイルジョイント18に心押し工具(センター)20が嵌合固定される。
【0011】
図1Aに示すように、第二主軸4にもワーク把持手段9を取り付けた状態では、従来の対向2スピンドル旋盤と同様に、例えば第二主軸台3を背面加工装置として使用することが出来る。即ち、図2Aに仮想線で示すような軸方向長さが短いワークWSの背面側を第一主軸台1側のワーク把持手段8に把持させて回転駆動し、当該ワークWSの軸方向正面側を刃物台5のタレット7に取り付けられた切削工具T(図2Aに仮想線で示す)で切削加工し、当該ワークWSの軸方向背面側を切削加工するときは、第一主軸台1側のワーク把持手段8で把持されている当該ワークWSの正面側を第二主軸台3側のワーク把持手段9に持ち替えさせて回転駆動し、当該ワークWSの軸方向背面側を刃物台5のタレット7に取り付けられた前記切削工具Tで切削加工することが出来る。
【0012】
図2Bに仮想線で示すように、軸方向長さの長い長尺ワークWLを心押し加工するときは、図1Bに示すように、第二主軸4のワーク把持手段9をテールフランジ17に代えて心押し工具(センター)20を取り付ける。而して長尺ワークWLは、その一端を第一主軸台1側のワーク把持手段8に把持させると共に、第二主軸台3を第一主軸台1側に移動させてその心押し工具20を長尺ワークWLの他端中心位置に接近させる。かかる状態でチャッキングシリンダー13を稼動させ、スリーブ14を介してクイルジョイント18をテールフランジ17に対し所要量押し出し駆動することにより、長尺ワークWLの他端中心位置に設けられた心出し穴に心押し工具20の尖端を嵌合させる。かかる状態でワーク把持手段8を介して第一主軸2により長尺ワークWLを回転駆動し、当該ワークWLの周面を刃物台5のタレット7に取り付けられた切削工具T(図2Bに仮想線で示す)で切削加工することが出来る。このとき第二主軸4は遊転自在な状態にあって、心押し工具20、クイルジョイント18、及びテールフランジ17を介してワークWLと一体に遊転する。
【0013】
【発明の効果】
本発明は以上のように実施し且つ使用することが出来るものであって、係る本発明の対向2スピンドル旋盤によれば、軸心方向に往復移動自在な第二主軸にワーク把持手段とワーク心押し工具とが択一的に取り付け可能に構成されているので、第二主軸にワーク把持手段を取り付けることにより当該第二主軸側を背面加工装置相当にし、対向2スピンドル旋盤本来の用途通りに軸方向長さの短いワークの表裏両面の切削加工に供することが出来ると共に、第二主軸にワーク心押し工具を取り付けることにより、軸心方向に往復移動自在な当該第二主軸側をテールストック装置相当にし、対向2スピンドル旋盤でありながら心押し加工旋盤同様の軸方向長さの長い長尺ワークの心押し切削加工を行わせることが出来る。即ち、チャック加工と心押し加工の両方が可能な旋盤として活用することが出来る。
【0014】
しかも従来のように、第二主軸台を後退移動させて別のテールストック装置を新たに設置する構成のものと比較して、全体を大型化させることもなく、省スペースで安価に実施することが出来る。又、NC旋盤であれば、心押し工具の移動手段は第二主軸台を移動させる数値制御軸となるので、ワークの心押し位置決めを数値制御することが出来る点も利点の一つである。
【0015】
尚、請求項2に記載の構成によれば、前記第二主軸に内装されているワーク把持手段の開閉駆動用押し引き操作部材(実施形態でのスリーブ14)を利用してワーク心押し工具の軸心方向位置微調整等を行うことが出来る。具体的には、心押し工具の移動距離や推力の調整がチャッキングシリンダーのストローク及び設定圧の変更により可能となる。
【図面の簡単な説明】
【図1】A図はチャック加工を行う状態での全体の斜視図であり、B図は心押し加工を行う状態での全体の斜視図である。
【図2】A図はワーク把持手段の取り付け構造を示す分解斜視図であり、B図は心押し工具の取り付け構造を示す分解斜視図である。
【図3】ワーク把持手段の取り付け構造を示す一部縦断側面図である。
【図4】心押し工具の取り付け構造を示す一部縦断側面図である。
【符号の説明】
1 第一主軸台
2 第一主軸
3 第二主軸台
4 第二主軸
4a フランジ部
5 刃物台
6 基台
7 工具支持具(タレット)
8,9 ワーク把持手段
9a ワーク把持用爪
10,11 受動プーリー
12,13 チャッキングシリンダー
14 スリーブ(ワーク把持手段の開閉駆動用押し引き操作部材)
15,19 取付用ボルト
16 ドローバー
17 テールフランジ
18 クイルジョイント
18a 周り止めボルト
20 心押し工具(センター)
T 切削工具
WS,WL ワーク
[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-spindle lathe in which workpiece holding means are attached to opposite ends of a first spindle and a second spindle which are concentrically arranged and can be driven to rotate.
[0002]
[Prior art]
An opposed two-spindle lathe in which a workpiece gripping means is attached to each of opposite ends of a first spindle and a second spindle is generally called a back processing lathe. As described in Literature 2, it is a conventionally well-known one, and is driven to rotate while the back side (inner end side) of a work having a relatively short axial length is held by the work holding means at the end of the first spindle. The surface side (outer end side) of the work is machined by a tool of a tool post provided therewith, or the surface side (outer end side) of the work is rotationally driven while being held by the work holding means at the second spindle end. The back side (inner end side) of the work can be machined with a tool on a tool post provided therewith. However, this opposed two-spindle lathe is capable of processing a long work having a relatively long axial length. Cannot be used for center pressing.
[0003]
[Patent Document 1]
Japanese Utility Model Application Laid-Open No. 61-78508 [Patent Document 2]
Japanese Patent Application Laid-Open No. 2000-59301
That is, conventionally, for machining both front and back surfaces of a work having a relatively short axial length, an opposed two-spindle lathe having a back side machining device on the second spindle side has been used, and a long work having a relatively long axial length has been used. In the center pressing process, a lathe with a tailstock (tailstock) equipped with a tailstock called a tailstock device is used in place of the second spindle, and the work to be processed and its processing method are used. It was necessary to use two types of lathes depending on the situation. Therefore, the second main spindle side (back processing apparatus) of the opposed two-spindle lathe can be traversed at right angles to the axial direction, and tailing is performed by opposing the first main spindle at the trace of the second main spindle side traversing. Although a method of additionally installing a tailstock device for use was conceived, not only was the entire device increased in size, but also a substantial increase in cost was inevitable.
[0005]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION An object of the present invention is to provide an opposed spindle lathe that can solve the above-mentioned conventional problems. Work gripping means 8 and 9 are attached to the opposed ends of the first main shaft 2 and the second main shaft 4 which are respectively rotatable and driven, and at least the second main shaft 4 is supported so as to be reciprocally movable in the axial direction thereof. In the opposing two-spindle lathe, the work holding means 9 and the work tailing tool 20 can be selectively attached to the second main shaft 4.
[0006]
When the present invention having the above configuration is implemented, when the push / pull operation member (sleeve 14) for opening / closing drive of the work gripping means 9 is concentrically housed in the second spindle 4, the work tail tool 20 is A quill joint 18 that is movable within a certain range in the axial direction with respect to a tail flange 17 that is detachable from the end of the second main shaft 4 is fixedly fitted inside the quill joint 18 and the push-pull operating member (sleeve 14). ) Can be configured to be connectable.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, reference numeral 1 denotes a first headstock provided with a first spindle 2, and 3 denotes a second headstock provided with a second spindle 4. Reference numeral 5 denotes a tool post. The first headstock 1 is fixed on a base 6, and the second headstock 3 has its second main shaft 4 concentrically opposed to the first main shaft 2 and reciprocates in the main shaft axis direction (horizontal direction Z). It is movably installed on the base 6. The tool post 5 is movable with respect to the base 6 in a main shaft axis direction (horizontal direction Z) and in a front-rear direction X perpendicular to the main shaft 6 and is movable up and down in a vertical direction Y with respect to the base 6. A tool support (turret) 7 is provided which is rotatable around an axis parallel to the axis direction (lateral direction Z). The tool rest 5 may not be able to move up and down in the vertical direction Y.
[0008]
Work gripping means 8 and 9 such as chucks and collets are detachably attached to inner ends of the first spindle 2 of the first headstock 1 and the second spindle 4 of the second headstock 3 which are concentrically opposed to each other. On the outer end side, passive pulleys 10 and 11 for transmitting a rotational force to the respective main shafts 2 and 4 and chucking cylinders 12 and 13 for opening and closing the work gripping means 8 and 9 are provided in series. . It should be noted that a driving means (motor or the like) for rotating each of the main shafts 2 and 4 via the passive pulleys 10 and 11 is not shown in the drawing. Since the configurations of the first headstock 1, the second headstock 3, and the tool rest 5 are the same as those of a conventional two-spindle lathe of this type, a more detailed description is omitted.
[0009]
The attachment structure of the work gripping means 9 to the second spindle 4 will be described. As shown in FIGS. 2A and 3, the second spindle 4 is cylindrical and has a flange portion at the inner end for attaching the workpiece gripping means. A sleeve 14 is provided inside and is internally driven by a chucking cylinder 13 to be pushed and pulled in the axial direction. The work gripping means 9 is attached concentrically to the flange portion 4a with mounting bolts 15, and the opening / closing drive of the work gripping claw 9a in the work gripping means 9 and the tip of the sleeve 14 are cylindrical. The work gripping claw 9a is opened and closed by pushing and pulling the sleeve 14 by the chucking cylinder 13 to drive the work grip.
[0010]
FIG. 1B shows a state in which a tail flange 17 is attached to the second spindle 4 in the above-structured two-spindle lathe in place of the work gripping means 9, and the second headstock 3 is changed to a tailstock device. . As shown in FIGS. 2B and 4, the tail flange 17 has a quill joint 18 fitted therein so as to be slidable within a predetermined range in the axial center direction by a detent bolt 18 a, and an inner end of the quill joint 18. The tail flange 17 is concentrically attached to the flange portion 4a of the second main shaft 4 with mounting bolts 19 in a state where the tail flange 17 is screwed to the tip of the sleeve 14 on the second main shaft 4 side. ) 20 is fitted and fixed.
[0011]
As shown in FIG. 1A, in a state in which the workpiece holding means 9 is also attached to the second spindle 4, for example, the second spindle head 3 can be used as a back surface processing device, similarly to the conventional two-spindle lathe. That is, the back side of the work WS whose axial length is short as indicated by the imaginary line in FIG. 2A is gripped by the work gripping means 8 of the first headstock 1 and driven to rotate, and the front side of the work WS in the axial direction is rotated. Is cut with a cutting tool T (indicated by a phantom line in FIG. 2A) attached to the turret 7 of the tool rest 5, and when the rear side in the axial direction of the work WS is cut, the first headstock 1 side The front side of the work WS gripped by the work gripping means 8 is held by the work gripping means 9 on the second headstock 3 side to be rotated and driven, and the rear side in the axial direction of the work WS is turret 7 of the tool rest 5. Can be cut by the cutting tool T attached to the cutting tool.
[0012]
As shown by phantom lines in FIG. 2B, when tailing a long workpiece WL having a long axial length, the work gripping means 9 of the second main spindle 4 is replaced with a tail flange 17 as shown in FIG. 1B. The tailstock (center) 20 is attached. Thus, one end of the long workpiece WL is gripped by the workpiece gripping means 8 on the first headstock 1 side, and the second headstock 3 is moved to the first headstock 1 side so that the tailstock tool 20 is moved. It is made to approach the center position of the other end of the long work WL. In this state, the chucking cylinder 13 is operated, and the quill joint 18 is driven through the sleeve 14 by a required amount to the tail flange 17 so that the quill joint 18 is driven into the centering hole provided at the center of the other end of the long work WL. The tip of tailstock tool 20 is fitted. In this state, the long work WL is driven to rotate by the first spindle 2 via the work holding means 8, and the peripheral surface of the work WL is attached to the cutting tool T attached to the turret 7 of the tool rest 5 (the virtual line shown in FIG. (Indicated by). At this time, the second main shaft 4 is freely rotatable, and freely rotates integrally with the work WL via the tailstock tool 20, the quill joint 18, and the tail flange 17.
[0013]
【The invention's effect】
The present invention can be implemented and used as described above. According to the opposed two-spindle lathe of the present invention, the work holding means and the work center are provided on the second main shaft which is reciprocally movable in the axial direction. Since the pressing tool is configured to be selectively attached, the work holding means is attached to the second spindle to make the second spindle side correspond to the backside machining device, and the opposed two-spindle lathe is used as the original intended use. It can be used for cutting both the front and back surfaces of a work with a short length in the direction, and by attaching a work tail tool to the second spindle, the second spindle side that can freely reciprocate in the axial direction is equivalent to a tailstock device. Thus, it is possible to perform tailstock cutting of a long work having a long axial length similar to that of a tailstock lathe, even though it is an opposed two-spindle lathe. That is, it can be used as a lathe capable of performing both chucking and tailing.
[0014]
In addition, compared with the conventional configuration in which the second headstock is moved backward and another tailstock device is newly installed, the entire headstock is not enlarged and the space is reduced and the cost is reduced. Can be done. Another advantage of the NC lathe is that the moving means of the tailstock is a numerical control axis for moving the second headstock, so that the tailstock positioning of the work can be numerically controlled.
[0015]
According to the configuration of the second aspect, the work tailoring tool is provided by using the push / pull operation member (sleeve 14 in the embodiment) for opening / closing drive of the work gripping means provided in the second spindle. Fine adjustment of the axial position can be performed. Specifically, adjustment of the moving distance and thrust of the tailstock can be made by changing the stroke of the chucking cylinder and the set pressure.
[Brief description of the drawings]
FIG. 1A is an overall perspective view in a state in which chuck processing is performed, and FIG. 1B is an overall perspective view in a state in which tailstock processing is performed.
FIG. 2A is an exploded perspective view showing an attachment structure of a work gripping means, and FIG. 2B is an exploded perspective view showing an attachment structure of a tailstock tool.
FIG. 3 is a partially longitudinal side view showing an attachment structure of a work gripping means.
FIG. 4 is a partially longitudinal side view showing an attachment structure of a tailstock tool.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 1 headstock 2 1st spindle 3 2nd headstock 4 2nd spindle 4a Flange part 5 Tool rest 6 Base 7 Tool support (turret)
8, 9 Work holding means 9a Work holding claws 10, 11 Passive pulley 12, 13 Chucking cylinder 14 Sleeve (push / pull operating member for opening / closing drive of work holding means)
15, 19 Mounting bolt 16 Drawbar 17 Tail flange 18 Quill joint 18a Detent bolt 20 Tail tool (center)
T cutting tool WS, WL Work

Claims (2)

同心状に配置されてそれぞれ回転駆動可能な第一主軸と第二主軸の各対向端部にワーク把持手段が取り付けられ、少なくとも第二主軸はその軸心方向に往復移動自在に支持された対向2スピンドル旋盤に於いて、前記第二主軸には、前記ワーク把持手段とワーク心押し工具とが択一的に取り付け可能に構成された、対向2スピンドル旋盤。Work gripping means is attached to each of opposite ends of the first main shaft and the second main shaft which are concentrically arranged and rotatably driven, and at least the second main shaft is supported so as to be reciprocally movable in the axial direction thereof. An opposed two-spindle lathe according to the spindle lathe, wherein the work holding means and the work tailstock can be selectively mounted on the second spindle. 前記第二主軸には、ワーク把持手段の開閉駆動用押し引き操作部材が同心状に内装され、前記ワーク心押し工具は、前記第二主軸の端部に着脱自在なテールフランジに対し軸心方向一定範囲内で移動自在なクイルジョイントに内嵌固定され、前記クイルジョイントと前記押し引き操作部材とが連結可能に構成されている、請求項1に記載の対向2スピンドル旋盤。A push / pull operation member for opening / closing drive of the work gripping means is concentrically provided on the second main spindle, and the work tail tool is arranged in an axial direction with respect to a tail flange detachably attached to an end of the second main spindle. The opposing two-spindle lathe according to claim 1, wherein the quill joint and the push / pull operation member are connected and fixed to a quill joint that is movable within a predetermined range.
JP2003047208A 2003-02-25 2003-02-25 Opposed 2-spindle lathe Withdrawn JP2004255491A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012056000A (en) * 2010-09-08 2012-03-22 Citizen Holdings Co Ltd Machine tool and machining method of material
CN104827061A (en) * 2015-03-26 2015-08-12 宁夏新瑞长城机床有限公司 Bi-station programming tailstock

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012056000A (en) * 2010-09-08 2012-03-22 Citizen Holdings Co Ltd Machine tool and machining method of material
CN104827061A (en) * 2015-03-26 2015-08-12 宁夏新瑞长城机床有限公司 Bi-station programming tailstock

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