JPH0796402A - Cutting-off method in opposed two-spindle lathe - Google Patents
Cutting-off method in opposed two-spindle latheInfo
- Publication number
- JPH0796402A JPH0796402A JP26414293A JP26414293A JPH0796402A JP H0796402 A JPH0796402 A JP H0796402A JP 26414293 A JP26414293 A JP 26414293A JP 26414293 A JP26414293 A JP 26414293A JP H0796402 A JPH0796402 A JP H0796402A
- Authority
- JP
- Japan
- Prior art keywords
- spindle
- chuck
- opposite side
- bar work
- opposed
- 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
Landscapes
- Turning (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、対向２軸旋盤でバー
ワークを加工するときのカットオフ方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cut-off method for processing bar work with an opposed two-axis lathe.
【０００２】[0002]
【従来の技術】対向２軸旋盤でバーワークを加工する場
合、第１の主軸を貫通したバーワークの先端を、対向側
の主軸のチャックで把持し、両主軸を同期回転させなが
ら、バーワークのカットオフ、すなわち突き切りを行
う。これにより、第１の主軸から対向側主軸へワークの
持ち替えを行うことができる。この場合に、対向側の主
軸をバーワークの先端に押し付けた状態のままで加工す
ると、カットオフ完了時に、分断された両側のワークで
工具が挟み付けられ、工具が破損してしまう。そのた
め、位置制御により対向側主軸をバーワークに接触する
寸前で止め、対向側主軸のチャックでバーワークをチャ
ックする方法が採られることもある。2. Description of the Related Art When machining a bar work with an opposed two-spindle lathe, the tip of the bar work penetrating the first spindle is gripped by a chuck of the spindle on the opposite side and both spindles are rotated synchronously. Cut off, that is, cut off. As a result, the work can be switched from the first spindle to the opposing spindle. In this case, if the spindle on the opposite side is pressed against the tip of the bar work while machining, the tool is pinched by the divided works on both sides when the cutoff is completed, and the tool is damaged. Therefore, a method may be adopted in which the opposite side spindle is stopped just before contacting the bar work by position control and the bar work is chucked by the chuck of the opposite side spindle.
【０００３】[0003]
【発明が解決しようとする課題】しかし、その場合、バ
ーワークの先端とチャック正面との間に隙間が生じるた
め、対向側主軸チャックによる堅固なワーク把持が行え
ず、後の対向側主軸での加工時に重切削が難しい。その
ため加工時間が長くなる。However, in that case, since a gap is created between the tip of the bar work and the front surface of the chuck, the opposite side main spindle chuck cannot firmly hold the work, and the opposite side main spindle will not be able to hold the work. Heavy cutting is difficult during processing. Therefore, the processing time becomes long.
【０００４】この発明の目的は、対向側主軸のチャック
でワークを密着状態に堅固に把持でき、かつカットオフ
完了時の工具の破損も生じない対向２軸旋盤のカットオ
フ方法を提供することである。An object of the present invention is to provide a cut-off method for an opposed two-axis lathe which can firmly hold a work in a close contact state by a chuck of a spindle on the opposite side and which does not damage the tool when the cut-off is completed. is there.
【０００５】[0005]
【課題を解決するための手段】この発明の対向２軸旋盤
のカットオフ方法は、次の各過程を含む。まず、第１の
主軸を貫通してそのチャックで把持されたバーワークの
先端に、進退駆動される対向側主軸を設定圧で押し付
け、停止させる。この押し付け状態のままで対向側主軸
のチャックを閉じる。ついで、対向側主軸の押し付け力
を解除した後にバーワークのカットオフを行う。A cut-off method for an opposed twin-spindle lathe according to the present invention includes the following steps. First, the opposing main spindle that is driven to move back and forth is pressed at a set pressure to the tip of the bar work that penetrates the first main spindle and is gripped by the chuck, and stops. The chuck of the opposite side spindle is closed in this pressed state. Then, after releasing the pressing force of the opposite side spindle, the bar work is cut off.
【０００６】[0006]
【作用】この方法によると、対向側主軸の押し付け力を
解除してからカットオフを行うので、カットオフ完了後
に、分断された両側のワークで工具が強く挟みつけられ
ることがなく、工具の破損の問題がない。また、対向側
主軸のチャックは、バーワークの先端に設定圧で押し付
けた状態で閉じるので、バーワークは先端が対向側主軸
の正面に密着した状態で把持され、後に押し付け力が解
除されても密着状態が維持される。そのため、対向側主
軸の把持が確実で、重切削も可能となる。[Operation] According to this method, the pressing force of the opposite side spindle is released before the cut-off is performed, so after the cut-off is completed, the tool is not strongly pinched by the divided works on both sides, and the tool is damaged. There is no problem. Further, since the chuck of the opposite side spindle is closed while being pressed against the tip of the bar work at a set pressure, the bar work is grasped with the tip in close contact with the front surface of the opposite side spindle, and even if the pressing force is released later. The close contact is maintained. Therefore, the opposite side spindle can be reliably gripped and heavy cutting can be performed.
【０００７】[0007]
【実施例】この発明の一実施例を図１および図２に基づ
いて説明する。この実施例に使用する対向２軸旋盤は、
図２に示すように互いに軸を揃えて対向配置した第１お
よび第２の主軸１ａ，１ｂと、各主軸１ａ，１ｂに対応
させてそれぞれ配置した第１および第２の工具タレット
２ａ，２ｂとを有する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The opposed twin-spindle lathe used in this example is
As shown in FIG. 2, first and second main spindles 1a and 1b which are arranged to face each other with their axes aligned, and first and second tool turrets 2a and 2b which are respectively arranged corresponding to the respective main spindles 1a and 1b. Have.
【０００８】第１の主軸１ａは後方からバーワークＷを
挿通できるものであり、その挿通されたバーワークＷを
把持するチャック３ａを有し、主軸台４ａに支持されて
いる。主軸台４ａはベッド（図示せず）に固定設置され
ている。対向側主軸１ｂは主軸台４ｂに支持され、主軸
台４ｂは、主軸１ｂの軸方向（Ｚ2 軸方向）に移動自在
なようにベッドのレール５ｂ上に設置されている。主軸
台４ｂのＺ2 軸方向への移動は、送りねじ６ｂを介して
Ｚ2 軸サーボモータ７ｂにより行われる。対向側主軸１
ｂのチャック３ｂは、正面にバーワークＷの先端を密着
させて把持可能な構成のものである。第１の主軸１ａの
駆動は、ベッド上に設置された主軸モータ（図示せず）
によりベルトを介して行われる。対向側主軸１ｂの駆動
は、ベッド上に設置された他の主軸モータにより、スプ
ラインおよびベルト等を介して任意進退位置で可能とさ
れ、あるいは主軸台４ｂに搭載された主軸モータで駆動
される。The first spindle 1a is capable of inserting the bar work W from the rear, has a chuck 3a for gripping the inserted bar work W, and is supported by a headstock 4a. The headstock 4a is fixedly installed on a bed (not shown). The facing spindle 1b is supported by a spindle stock 4b, and the spindle stock 4b is installed on a rail 5b of the bed so as to be movable in the axial direction of the spindle 1b (Z 2 axis direction). The movement of the headstock 4b in the Z 2 axis direction is performed by the Z 2 axis servomotor 7b via the feed screw 6b. Opposite side spindle 1
The chuck 3b of b is configured such that the front end of the bar work W can be brought into close contact with the front surface and gripped. The first spindle 1a is driven by a spindle motor (not shown) installed on the bed.
By means of a belt. The opposite side spindle 1b can be driven by another spindle motor installed on the bed at an arbitrary forward / backward position via a spline, a belt, or the like, or is driven by a spindle motor mounted on the spindle stock 4b.
【０００９】第１のタレット２ａは、インデックスハウ
ジング９ａを介して送り台８ａに設置され、送り台８ａ
はＺ1 軸方向と直交する方向（Ｘ1 軸方向）に移動自在
なようにベッドのレール１０ａ上に設置されている。イ
ンデックスハウジング９ａは、Ｚ1 軸方向に移動自在な
ように送り台８ａのレール１１ａ上に設置され、このイ
ンデックスハウジング９ａにタレット軸１２ａを介して
タレット２ａが割出回転可能に設置されている。送り台
８ａおよびインデックスハウジング９ａは、各々送りね
じ１３ａ，１４ａを介してＸ1 軸サーボモータ１５ａお
よびＺ1 軸サーボモータ１６ａにより、Ｘ1 ，Ｚ1 軸方
向に送られる。タレット２ａは、正面形状が多角形のド
ラム状のものであり、各周面部分からなる工具ステーシ
ョンに各種の工具１７ａが装着される。The first turret 2a is installed on the feed base 8a via an index housing 9a, and the feed base 8a
Is installed on the bed of the rail 10a as be movable in the direction (X 1 axis direction) perpendicular to the Z 1 axial direction. The index housing 9a is installed on the rail 11a of the feed base 8a so as to be movable in the Z 1 axis direction, and the turret 2a is installed on the index housing 9a via the turret shaft 12a so as to be indexable and rotatable. Feeding table 8a and the index housing 9a are each feed screw 13a, the X 1 axis servomotor 15a and Z 1 axis servo motor 16a through 14a, it is sent to X 1, Z 1 axial direction. The turret 2a is a drum having a polygonal front shape, and various kinds of tools 17a are mounted on a tool station composed of respective peripheral surface portions.
【００１０】第２のタレット２ｂは、送り台８ｂに設け
られたインデックスハウジング９ｂにタレット軸１２ｂ
を介して設置され、送り台８ｂと共に、Ｚ2 軸方向と直
交する方向（Ｘ2 軸方向）にのみ移動自在とされてい
る。送り台８ｂは、ベッドのレール１０ｂ上に設置さ
れ、送りねじ１３ｂを介してＸ2 軸サーボモータ１５ｂ
により送られる。対向側主軸１ｂに対するタレット２ｂ
の工具１７ｂの軸方向送りは、主軸台４ｂの進退で行わ
れる。なお、上記説明では軸方向として、第１の主軸１
ａおよびタレット２ａ側ではＺ1 ，Ｘ1 を、第２の主軸
１ｂおよびタレット２ｂ側ではＺ2 ，Ｘ2 を用いて区別
しているが、Ｚ1 ，Ｚ2 の軸方向およびＸ1 ，Ｘ2 の軸
方向は、共に同軸か、または平行な方向である。The second turret 2b has a turret shaft 12b attached to an index housing 9b provided on a feed base 8b.
And is movable along with the feed base 8b only in the direction orthogonal to the Z 2 axis direction (X 2 axis direction). The feed table 8b is installed on the rail 10b of the bed, and the feed screw 13b is used to feed the X 2 -axis servo motor 15b.
Sent by. Turret 2b for opposite side spindle 1b
The axial feed of the tool 17b is performed by moving the headstock 4b back and forth. In the above description, the first spindle 1 is defined as the axial direction.
The Z 1, X 1 is a and the turret 2a side, the second main spindle 1b and the turret 2b side are distinguished with Z 2, X 2 is, Z 1, axial and X 1 of Z 2, X 2 The axes of the two are coaxial or parallel to each other.
【００１１】ＮＣ装置１８は、対向２軸旋盤の全体を制
御する制御装置であって、バーワークＷを加工するとき
の第１，第２の主軸１ａ，１ｂの同期回転や、第１，第
２のタレット２ａ，２ｂの間の動作の連携を制御する連
携制御手段１９が設けられている。また、対向側主軸４
ｂのＺ2 軸サーボモータ７ｂのトルクを監視する手段を
備えている。The NC device 18 is a control device for controlling the whole of the facing two-axis lathe, and is for synchronously rotating the first and second spindles 1a and 1b when machining the bar work W, and the first and first lathes. A cooperation control unit 19 for controlling the cooperation of the operation between the two turrets 2a and 2b is provided. In addition, the opposite side spindle 4
It is provided with a means for monitoring the torque of the Z 2 -axis servomotor 7b of b.
【００１２】この対向２軸旋盤によってバーワークＷを
カットオフするときの動作を説明する。図１（Ａ）のよ
うに主軸台４ａの後方から第１の主軸１ａにバーワーク
Ｗを挿通し、受渡し位置直前へ位置決めしてチャック３
ａで把持する。この後、対向側主軸１ｂは、トルクリミ
ットを設定して第１の主軸１ａ側へトルクスキップ移動
させる。The operation when the bar work W is cut off by this opposed two-axis lathe will be described. As shown in FIG. 1 (A), the bar work W is inserted from the rear of the headstock 4a into the first spindle 1a and positioned immediately before the delivery position to move the chuck 3
Hold with a. After that, the opposing main spindle 1b sets a torque limit and makes a torque skip movement to the first main spindle 1a side.
【００１３】対向側主軸１ｂが図１（Ｂ）のように前進
してバーワークＷの先端に押し付けられ、予め設定した
トルク値に達すると、そのトルク値が維持されるように
押しつけを停止する。この設定トルクによる押し付け状
態のままでチャック３ｂを図１（Ｃ）のように閉じ、バ
ーワークＷの先端部を把持する。そのため、バーワーク
Ｗは先端面がチャック３ｂの正面に密着した状態で把持
される。As shown in FIG. 1 (B), the opposed spindle 1b is advanced and pressed against the tip of the bar work W, and when the preset torque value is reached, the pressing is stopped so that the torque value is maintained. . The chuck 3b is closed as shown in FIG. 1C while the pressing state by the set torque is maintained, and the tip portion of the bar work W is gripped. Therefore, the bar work W is gripped in a state in which the tip end surface is in close contact with the front surface of the chuck 3b.
【００１４】チャック３ｂの閉じ動作が完了すると、対
向側主軸１ｂを再度トルクスキップ移動させ、トルクリ
ミット検出により対向側主軸１ｂの押し付け力を無く
す。これにより、バーワークＷがチャック３ｂの正面に
密着した状態で、押し付け力が解除される。When the closing operation of the chuck 3b is completed, the opposing main spindle 1b is moved again by the torque skip, and the pressing force of the opposing main spindle 1b is eliminated by the torque limit detection. As a result, the pressing force is released while the bar work W is in close contact with the front surface of the chuck 3b.
【００１５】次に、両方の主軸１ａ，１ｂを同期回転さ
せ、第１のタレット２ａの工具１７ａでバーワークＷを
カットオフする。Next, both the spindles 1a and 1b are synchronously rotated, and the bar work W is cut off by the tool 17a of the first turret 2a.
【００１６】このときのカットオフでは、バーワークＷ
に対向側主軸１ｂによる押し付け力が作用していないの
で、カットオフ完了時に両チャック３ａ，３ｂに把持さ
れた分断ワークで工具１７ａが挟まれるということがな
く、工具１７ａの破損が生じない。しかも、バーワーク
Ｗは先端面がチャック３ｂの正面に密着した状態で把持
されるので、チャック３ｂによるバーワークＷの把持が
堅固に行える。そのため、カットオフ時や、後の対向側
主軸３ｂにおける加工時に重切削が行え、加工時間が短
縮される。At the cutoff at this time, bar work W
Since the pressing force by the opposing side spindle 1b does not act on the tool 17a, the tool 17a is not pinched by the divided workpieces held by the chucks 3a and 3b at the time of completion of the cutoff, and the tool 17a is not damaged. Moreover, since the bar work W is gripped in a state where the tip end surface is in close contact with the front surface of the chuck 3b, the bar work W can be firmly gripped by the chuck 3b. Therefore, heavy cutting can be performed at the time of cut-off or at the time of later processing on the opposed side spindle 3b, and the processing time can be shortened.
【００１７】なお、上記実施例では、対向側主軸１ｂに
よるバーワークＷの把持を行ってから両主軸１ａ，１ｂ
を同期回転させる場合につき説明したが、常時両主軸１
ａ，１ｂを同期回転させておいて、対向側主軸１ｂのチ
ャック３ｂによる把持を行わせても良い。In the above embodiment, the bar work W is gripped by the opposed main spindle 1b before the main spindles 1a and 1b are gripped.
I explained the case of synchronous rotation of both spindles, but both spindles 1
It is also possible to rotate a and 1b synchronously and hold the opposing main spindle 1b by the chuck 3b.
【００１８】[0018]
【発明の効果】この発明の対向２軸旋盤のカットオフ方
法は、第１の主軸を貫通したバーワークの先端に、進退
駆動される対向側の主軸を設定圧で押し付けて停止さ
せ、この押し付け状態のままで対向側主軸のチャックを
閉じ、対向側主軸の押し付け力を解除した後に、カット
オフを行う方法であるため、ワークの押し付け力でカッ
トオフ完了時に工具が破損することがなく、しかもワー
クがチャックの正面に密着した状態で把持できて、堅固
な把持が行える。According to the cut-off method for an opposed twin-spindle lathe of the present invention, the main shaft on the opposite side, which is driven back and forth, is pressed at a set pressure to the tip of the bar work penetrating the first main shaft and stopped, and this pressing is performed. In this state, the chuck of the opposite side spindle is closed, the cutoff is performed after releasing the pressing force of the opposite side spindle, so the tool's pushing force does not damage the tool at the completion of cutoff, and The workpiece can be gripped in close contact with the front of the chuck, and firm gripping can be performed.
【図１】この発明のカットオフ方法の一実施例を示す説
明図である。FIG. 1 is an explanatory view showing an embodiment of a cutoff method of the present invention.
【図２】同カットオフ方法が適用される対向２軸旋盤の
平面図とブロック図を組み合わせた説明図である。FIG. 2 is an explanatory diagram combining a plan view and a block diagram of an opposed two-axis lathe to which the same cutoff method is applied.
１ａ，１ｂ…主軸、２ａ，２ｂ…タレット、３ａ，３ｂ
…チャック、６ｂ…送りねじ、７ｂ…Ｚ2 軸サーボモー
タ、８ａ，８ｂ…送り台、９ａ，９ｂ…インデックスハ
ウジング、１３ａ，１３ｂ，１４ａ…送りねじ、１５ａ
…Ｘ1 軸サーボモータ、１６ａ…Ｚ1 軸サーボモータ、
１７ａ…工具、Ｗ…バーワーク1a, 1b ... Spindle, 2a, 2b ... Turret, 3a, 3b
... Chuck, 6b ... Feed screw, 7b ... Z 2- axis servo motor, 8a, 8b ... Feed base, 9a, 9b ... Index housing, 13a, 13b, 14a ... Feed screw, 15a
… X 1- axis servo motor, 16a… Z 1- axis servo motor,
17a ... Tool, W ... Bar work
Claims (1)
持されたバーワークの先端に、進退駆動される対向側の
主軸を設定圧で押し付けて停止させ、この押し付け状態
のままで対向側主軸のチャックを閉じ、対向側主軸の押
し付け力を解除した後に、前記バーワークのカットオフ
を行う対向２軸旋盤のカットオフ方法。1. A main shaft on the opposite side, which is driven forward and backward, is pressed at a set pressure to the tip of a bar work that has penetrated the first main shaft and is gripped by the chuck, and is stopped. A cut-off method for an opposed two-axis lathe, in which the chuck of the main shaft is closed and the pressing force of the main shaft on the opposite side is released, and then the bar work is cut off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5264142A JP2701706B2 (en) | 1993-09-27 | 1993-09-27 | Cut-off method for facing two-axis lathe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5264142A JP2701706B2 (en) | 1993-09-27 | 1993-09-27 | Cut-off method for facing two-axis lathe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0796402A true JPH0796402A (en) | 1995-04-11 |
| JP2701706B2 JP2701706B2 (en) | 1998-01-21 |
Family
ID=17399049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5264142A Expired - Fee Related JP2701706B2 (en) | 1993-09-27 | 1993-09-27 | Cut-off method for facing two-axis lathe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2701706B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012020387A (en) * | 2010-07-16 | 2012-02-02 | Komatsu Ntc Ltd | Device and method for turning crankshaft |
| JP2017170529A (en) * | 2016-03-18 | 2017-09-28 | 株式会社アマダホールディングス | Work-piece holding method and chuck device |
| JP2020082276A (en) * | 2018-11-27 | 2020-06-04 | スター精密株式会社 | lathe |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101839878B1 (en) | 2013-11-29 | 2018-03-19 | 무라다기카이가부시끼가이샤 | Machine tool and cutting method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0288101A (en) * | 1988-09-22 | 1990-03-28 | Hitachi Seiki Co Ltd | Work transfer confirmation method for facing type two spindle lathe and control device therefor |
| JPH0335902A (en) * | 1989-06-30 | 1991-02-15 | Okuma Mach Works Ltd | Cutting-off tool protecting method for opposed spindle lathe |
-
1993
- 1993-09-27 JP JP5264142A patent/JP2701706B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0288101A (en) * | 1988-09-22 | 1990-03-28 | Hitachi Seiki Co Ltd | Work transfer confirmation method for facing type two spindle lathe and control device therefor |
| JPH0335902A (en) * | 1989-06-30 | 1991-02-15 | Okuma Mach Works Ltd | Cutting-off tool protecting method for opposed spindle lathe |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012020387A (en) * | 2010-07-16 | 2012-02-02 | Komatsu Ntc Ltd | Device and method for turning crankshaft |
| JP2017170529A (en) * | 2016-03-18 | 2017-09-28 | 株式会社アマダホールディングス | Work-piece holding method and chuck device |
| JP2020082276A (en) * | 2018-11-27 | 2020-06-04 | スター精密株式会社 | lathe |
| WO2020110573A1 (en) * | 2018-11-27 | 2020-06-04 | スター精密株式会社 | Lathe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2701706B2 (en) | 1998-01-21 |
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