JP2000033501A - Bar supply machine - Google Patents
Bar supply machineInfo
- Publication number
- JP2000033501A JP2000033501A JP10323763A JP32376398A JP2000033501A JP 2000033501 A JP2000033501 A JP 2000033501A JP 10323763 A JP10323763 A JP 10323763A JP 32376398 A JP32376398 A JP 32376398A JP 2000033501 A JP2000033501 A JP 2000033501A
- Authority
- JP
- Japan
- Prior art keywords
- bar
- headstock
- feed member
- feed
- clutch
- 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]
【発明の属する技術分野】本発明は、旋盤の主軸台に対
して棒材を供給する棒材供給機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bar feeder for feeding a bar to a headstock of a lathe.
【０００２】[0002]
【従来の技術】旋盤に対する棒材供給機として、例えば
特開昭６４−４０２０２号公報に開示されているよう
に、棒材の後端部を保持しつつその送り方向に移動可能
な送り部材と、旋盤の主軸台の運動を棒材の送り部材に
伝達する第１の伝達機構と、送り部材を主軸台から独立
して駆動するためのモータと、そのモータの駆動を送り
部材に伝達する第２の伝達機構とが設けられたものが知
られている。二つの伝達機構の伝達経路にはそれぞれク
ラッチが設けられ、いずれか一方のクラッチが接続され
ているときは他方のクラッチの接続が解除される。これ
により、棒材の加工中は主軸台の運動を送り部材に伝達
して棒材を主軸台と一体的に前後に移動させ、非加工時
はモータにて送り部材を単独で駆動させることが可能と
されている。2. Description of the Related Art As a bar feeder for a lathe, for example, as disclosed in Japanese Patent Application Laid-Open No. 40202/1988, a feed member movable in the feed direction while holding the rear end of the bar is disclosed. A first transmission mechanism for transmitting the motion of the headstock of the lathe to the bar feed member, a motor for driving the feed member independently of the headstock, and a motor for transmitting the drive of the motor to the feed member. The one provided with two transmission mechanisms is known. A clutch is provided in each of the transmission paths of the two transmission mechanisms, and when one of the clutches is connected, the connection of the other clutch is released. This allows the movement of the headstock to be transmitted to the feed member during the processing of the bar material to move the bar material back and forth integrally with the headstock, and the motor to drive the feed member alone when not processing. It is possible.
【０００３】[0003]
【発明が解決しようとする課題】一般に、棒材供給機で
は、一回の加工が終了すると主軸台に設けられたチャッ
クが開いて棒材が解放され、その状態で主軸台が棒材供
給機側に所定量後退し、その後にチャックが閉じて棒材
が掴み換えられる。この掴み換えの際に棒材が主軸台か
ら必要以上に突き出されることがないように、主軸台の
前方にはストッパが配置され、棒材の前端はそのストッ
パに当接する。ところが、主軸台が棒材を解放している
状態では、棒材供給機側の機械的な遊び等に起因して棒
材が後退してその前端がストッパから離れるおそれがあ
る。ストッパから離れた状態で棒材が掴み換えられる
と、その掴み換えの位置が本来の位置よりも棒材の前端
側にずれ、その結果、加工時における主軸台からの棒材
の突出長さが不足して加工不良の原因となる。Generally, in the bar feeder, after one machining operation, the chuck provided on the headstock is opened to release the bar, and in this state, the headstock is moved to the bar feeder. Side, the chuck is closed and the bar is re-gripped. A stopper is arranged in front of the headstock so that the bar does not protrude more than necessary from the headstock at the time of the gripping, and the front end of the bar comes into contact with the stopper. However, in a state where the headstock releases the bar, there is a possibility that the bar retreats due to mechanical play or the like on the bar feeder side and the front end thereof separates from the stopper. If the bar is re-gripped away from the stopper, the re-gripping position will be shifted to the front end side of the bar from the original position, and as a result, the protruding length of the bar from the headstock during machining will be reduced. Insufficiency causes machining failure.
【０００４】また、従来の棒材供給機では、棒材の掴み
換えと加工とを繰り返す間に棒材の撓みが徐々に拡大
し、やがては棒材がその回転中心線に対して半径方向外
側に大きく膨らんで回転し、機械的な振動や騒音が拡大
して正常な加工が不可能となることがある。その理由の
一つは次の通りである。すなわち、棒材の形状誤差や棒
材供給機と旋盤の主軸との芯合わせの誤差等のため、棒
材は加工当初より幾らか撓んだ状態で回転し、その撓み
に応じて棒材の送り部材は前方（旋盤側）に引き寄せら
れる。引き寄せられた送り部材は回転終了後も棒材供給
機の駆動装置からの抵抗によって元の位置まで戻らず、
その結果として棒材に撓みが残される。この繰り返しに
よって棒材の撓みが徐々に蓄積されるのである。Further, in the conventional bar feeder, the bending of the bar gradually increases during repetition of gripping and processing of the bar, and eventually the bar becomes radially outward with respect to its rotation center line. In some cases, the swelling and swelling may cause the mechanical vibration and noise to increase, making normal processing impossible. One of the reasons is as follows. That is, due to the bar shape error and the alignment error between the bar feeder and the main shaft of the lathe, the bar rotates in a slightly bent state from the beginning of the processing, and the bar is rotated according to the bending. The feed member is drawn forward (the lathe side). The drawn feed member does not return to the original position even after the rotation ends due to resistance from the driving device of the bar feeder,
As a result, deflection is left in the bar. The repetition gradually accumulates the bending of the bar.
【０００５】ここで、上記公報記載の棒材供給機は、主
軸台が棒材を掴み換える際に主軸台と棒材の送り部材と
の接続を解除し、モータにより棒材の送り部材を単独で
駆動可能としているものの、その駆動は棒材供給機から
旋盤に向かって棒材を送り込むか、あるいは主軸台内に
残った残材を引き抜いて新たな棒材を供給するために行
われるに過ぎず、上述した不都合は何ら解決されない。
また、棒材供給機には、主軸台の移動に拘わりなく棒材
を主軸台に向かって押し続けるいわゆる常押し方式のも
のがあり、そのような棒材供給機によれば主軸台が棒材
を解放している間も棒材がストッパに押し付けられて上
述した棒材の後退を防止できる。しかしながら、モータ
等の駆動源を使用して棒材をストッパに押し続けた場
合、過剰な送り力により棒材が弾性限度を超えて撓み変
形するおそれがあり、上述した棒材の撓みによる問題が
生じ易い。特に細くて剛性が低い棒材を送る場合にその
傾向が顕著となる。Here, the bar feeder described in the above-mentioned publication releases the connection between the headstock and the bar feeder when the headstock grips the bar, and the bar feeder is independently driven by a motor. However, the drive is only performed to feed the bar from the bar feeder toward the lathe, or to pull out the remaining material remaining in the headstock and supply a new bar. However, the inconvenience described above is not solved at all.
In addition, there is a so-called normal push type bar feeder that keeps pushing the bar toward the headstock regardless of the movement of the headstock. According to such a bar feeder, the headstock is made of a bar material. The bar is pressed against the stopper even during the release, and the above-described retraction of the bar can be prevented. However, if the bar is continuously pressed against the stopper using a drive source such as a motor, the bar may be deformed beyond its elastic limit due to excessive feed force. Easy to occur. In particular, when a thin and low-rigidity bar is fed, the tendency becomes remarkable.
【０００６】本発明は、棒材の掴み換えと加工とを繰り
返しても棒材の位置がずれたりその撓みが蓄積されるこ
とがなく、棒材をその加工当初から残材となるまで正確
に供給できる棒材供給機を提供することを目的とする。According to the present invention, the position of the bar is not displaced and its bending is not accumulated even if the re-grapping and the processing of the bar are repeated, and the bar is accurately removed from the beginning of the process until the bar becomes a residual material. It is an object of the present invention to provide a bar feeder capable of feeding.
【０００７】[0007]
【課題を解決するための手段】以下、本発明について説
明する。なお、本発明の理解を容易にするために添付図
面の参照符号を括弧書きにて付記するが、それにより本
発明が図示の形態に限定されるものではない。Hereinafter, the present invention will be described. In addition, in order to facilitate understanding of the present invention, reference numerals in the accompanying drawings are added in parentheses, but the present invention is not limited to the illustrated embodiment.
【０００８】請求項１の発明は、前進および後退が可能
な主軸台（１１）を備えた旋盤（１）に対して主軸台の
後方から前方に向けて棒材（３）を供給する棒材供給機
（２）に適用される。そして、棒材の送り方向後端部を
保持しつつ棒材と一体に進退可能に設けられた送り部材
（２０）と、送り部材（２０）を棒材（３）の送り方向
に駆動するために設けられ、主軸台（１１）の前進およ
び後退に連係して送り部材を棒材の送り方向に移動させ
る連係モードと、主軸台から独立して送り部材を駆動す
る非連係モードとの間で動作状態を切り換え可能な駆動
装置（２１）と、棒材（３）を掴み換えるために主軸台
（１１）が棒材を解放して棒材供給機（２）側へ後退す
る際に、駆動装置（２１）を前記非連係モードに切り換
えるとともに、棒材が前進する方向に駆動装置が所定量
駆動され、かつその駆動後は駆動装置によって送り部材
が定位置に拘束されるように駆動装置の動作を制御する
制御装置（４０）とを備えることにより、上述した課題
を解決する。According to a first aspect of the present invention, there is provided a bar material for supplying a bar material (3) to a lathe (1) having a headstock (11) capable of moving forward and backward from the rear to the front of the headstock. Applied to feeder (2). And a feed member (20) provided integrally with the bar so as to be able to advance and retreat while holding a rear end portion in the feed direction of the bar, and a feed member (20) for driving the feed member in the feed direction of the bar (3). Between a linked mode in which the feed member is moved in the feed direction of the bar in association with the advance and retreat of the headstock (11), and a non-linked mode in which the feed member is driven independently of the headstock. A driving device (21) capable of switching the operation state and a driving device when the headstock (11) releases the bar and retreats to the bar feeder (2) side to grasp the bar (3). The device (21) is switched to the non-coupling mode, and the driving device is driven by a predetermined amount in the direction in which the bar advances, and after the driving, the driving device is constrained by the driving device so that the feed member is restrained at a fixed position. And a control device (40) for controlling the operation. To solve the problems described above.
【０００９】この発明によれば、主軸台（１１）が棒材
（３）を解放して後退する際に駆動装置（２１）を非連
係モードに切り換えているので、送り部材（２０）を主
軸台から独立して駆動できる。この状態で送り部材（２
０）が前進する方向に駆動装置を駆動しているので、棒
材を旋盤（１）の主軸台の前方に配置されるストッパ
（１３）に押し付けて棒材の後退を防止できる。しか
も、駆動装置（２１）の駆動量が所定量に制限され、そ
の駆動後は送り部材（２０）が駆動装置によって定位置
に拘束されるので、棒材（３）の撓みを弾性範囲内に制
限することができる。According to the present invention, when the headstock (11) releases and retreats the bar (3), the driving device (21) is switched to the non-coupling mode. Can be driven independently of the table. In this state, the feed member (2
Since the drive device is driven in the direction in which the bar is moved forward, the bar can be pressed against the stopper (13) disposed in front of the headstock of the lathe (1) to prevent the bar from retreating. In addition, the driving amount of the driving device (21) is limited to a predetermined amount, and after the driving, the feed member (20) is restrained at a fixed position by the driving device, so that the bending of the bar (3) is kept within the elastic range. Can be restricted.
【００１０】請求項２の発明では、請求項１記載の棒材
供給機において、駆動装置（２１）は、送り部材（２
０）が駆動装置によって拘束されることなく棒材（３）
の送り方向に自由に移動できるように駆動装置と送り部
材との接続を解除する解除モードに切り換え可能であ
り、制御装置（４０）は、主軸台（１１）による棒材
（３）の掴み換えの完了に伴って駆動装置（２１）を解
除モードに一旦切り換え、その後に駆動装置を連係モー
ドへと切り換える。According to a second aspect of the present invention, in the bar feeder according to the first aspect, the driving device (21) includes a feed member (2).
0) is not constrained by the driving device and the bar (3)
The control device (40) can change the gripping of the bar (3) by the headstock (11) so that the connection between the drive device and the feed member can be released so that the bar member (3) can be freely moved in the feed direction. With the completion of the operation, the driving device (21) is temporarily switched to the release mode, and then the driving device is switched to the linkage mode.
【００１１】この発明によれば、主軸台（１１）が棒材
（３）を掴み換えると駆動装置（２１）が解除モードへ
と一旦切り換えられて駆動装置と送り部材（２０）との
接続が解除される。この状態では、送り部材が駆動装置
にて拘束されないため、棒材（３）の撓みが解消される
ように棒材が変位でき、棒材の撓みが蓄積しない。According to the present invention, when the headstock (11) grasps the bar (3), the driving device (21) is temporarily switched to the release mode, and the connection between the driving device and the feed member (20) is established. It is released. In this state, since the feed member is not restrained by the driving device, the bar can be displaced so as to eliminate the deflection of the bar (3), and the deflection of the bar does not accumulate.
【００１２】請求項３の発明では、請求項２記載の棒材
供給機において、制御装置（４０）は、棒材（３）の掴
み換えの完了後、棒材が後退する方向に駆動装置（２
１）を所定量駆動し、その後に前記解除モードへの切り
換えを実行する。According to a third aspect of the present invention, in the bar feeder according to the second aspect, the control device (40) includes a driving device (40) in a direction in which the bar retreats after the completion of the gripping of the bar (3). 2
1) is driven by a predetermined amount, and then the mode is switched to the release mode.
【００１３】この発明によれば、解除モードへの切り換
えに先立って、棒材（３）が後退する方向へ駆動装置
（２１）が駆動されるため、棒材の送り部材（２０）が
棒材の送り方向後方へ確実に変位して棒材の撓みが解消
される。従って、棒材が細くてその剛性が低い場合でも
確実に棒材をその送り方向後方へ変位させることができ
る。According to the present invention, prior to switching to the release mode, the driving device (21) is driven in the direction in which the bar (3) moves backward, so that the bar feed member (20) is Is reliably displaced rearward in the feed direction, and the bending of the bar is eliminated. Therefore, even when the bar is thin and its rigidity is low, the bar can be reliably displaced backward in the feed direction.
【００１４】請求項４の発明では、請求項３記載の棒材
供給機において、前記駆動装置（２１）は、緩衝材（３
４）を介して前記送り部材（２０）を後退させる。According to a fourth aspect of the present invention, in the bar feeder according to the third aspect, the driving device (21) includes a buffer material (3).
The feed member (20) is retracted via 4).
【００１５】この発明によれば、駆動装置（２１）が緩
衝材（３４）を介して送り部材（２０）を後退させるの
で、緩衝材（３４）で駆動装置（２１）の送り部材（２
０）に対する相対的な変位を許容しながら送り部材（２
０）を後退させることができる。このため、駆動装置
（２１）を後退させても主軸台（１１）または送り部材
（２０）から棒材（３）が抜けるのを防止できる。According to the present invention, since the driving device (21) retreats the feed member (20) via the cushioning material (34), the feeding member (2) of the driving device (21) is moved by the cushioning material (34).
0) while allowing the relative displacement with respect to the feed member (2).
0) can be retracted. For this reason, even if the drive device (21) is retracted, it is possible to prevent the bar (3) from coming off from the headstock (11) or the feed member (20).
【００１６】請求項５の発明では、請求項１〜３のいず
れかに記載の棒材供給機において、駆動装置（２１）
は、主軸台（１１）の運動を送り部材（２０）へ伝達す
る第１の伝達機構（２２，２３，２４，２５，２６，２
７，２８）と、送り部材を駆動するための駆動源（３
３）と、駆動源（３３）の運動を送り部材（２０）に伝
達する第２の伝達機構（２２，２３，２４，２５，３
２）とを具備し、第１および第２の伝達機構には、それ
ぞれの運動伝達経路の接続および接続解除を切り換える
第１および第２のクラッチ（２６，３２）が設けられて
いる。According to a fifth aspect of the present invention, in the bar feeder according to any one of the first to third aspects, the driving device (21)
Is a first transmission mechanism (22, 23, 24, 25, 26, 2) for transmitting the movement of the headstock (11) to the feed member (20).
7, 28) and a drive source (3
3) and a second transmission mechanism (22, 23, 24, 25, 3) for transmitting the movement of the drive source (33) to the feed member (20).
2), and the first and second transmission mechanisms are provided with first and second clutches (26, 32) for switching connection and disconnection of respective motion transmission paths.
【００１７】この発明によれば、第１のクラッチ（２
６）を接続しかつ第２のクラッチ（３２）の接続を解除
すると駆動装置（２１）が前記連係モードに、第２のク
ラッチ（３２）を接続しかつ第１のクラッチ（２６）の
接続を解除すると駆動装置が前記非連係モードにそれぞ
れ切り換わる。また、第１のクラッチ（２６）および第
２のクラッチ（３２）の双方の接続を解除すると駆動装
置が前記解除モードに切り換わる。従って、クラッチ
（２６，３２）の切り換えのみで駆動装置（２１）のモ
ードを請求項１〜３の発明の通りに変更できる。According to the present invention, the first clutch (2
When the second clutch (32) is connected and the second clutch (32) is disconnected, the driving device (21) switches the connection mode to connect the second clutch (32) and disconnect the first clutch (26). Upon release, the drive switches to the uncoupled mode, respectively. When the connection of both the first clutch (26) and the second clutch (32) is released, the driving device switches to the release mode. Therefore, the mode of the driving device (21) can be changed as in the first to third aspects of the invention only by switching the clutches (26, 32).
【００１８】請求項６の発明は、前進および後退が可能
な主軸台（１１）を備えた旋盤（１）に対して主軸台の
後方から前方に向けて棒材（３）を供給する棒材供給機
（２）に適用される。そして、棒材の送り方向後端部を
保持しつつ棒材と一体に進退可能に設けられた送り部材
（２０）と、主軸台の前進および後退に連係して送り部
材が棒材の送り方向に移動するように主軸台の運動を送
り部材に伝達可能であり、その伝達経路には第１のクラ
ッチ（２６）が設けられた第１の伝達機構（２２，２
３，２４，２５，２６，２７，２８）と、送り部材を駆
動するためのモータ（３３）と、モータ（３３）の運動
を送り部材に伝達可能であり、その伝達経路には第２の
クラッチ（３２）が設けられた第２の伝達機構（２２，
２３，２４，２５，３２）と、棒材を掴み換えるために
主軸台が棒材を解放して棒材供給機側へ後退する際に、
第１のクラッチ（２６）の接続を解除する一方で第２の
クラッチ（３２）を接続するとともに、棒材を前進させ
る方向へモータ（３３）の駆動軸を所定量駆動し、その
後当該モータの駆動軸を同一位置に保持する制御装置
（４０）とを備えることにより、上述した課題を解決す
る。According to a sixth aspect of the present invention, there is provided a bar material for supplying a bar material (3) to a lathe (1) having a headstock (11) capable of moving forward and backward from the rear to the front of the headstock. Applied to feeder (2). A feed member (20) provided integrally with the bar so as to be able to advance and retreat while holding the rear end portion in the feed direction of the bar, and the feed member is moved in the feed direction of the bar in conjunction with advance and retreat of the headstock. And a first transmission mechanism (22, 2) provided with a first clutch (26) on the transmission path.
3, 24, 25, 26, 27, 28), a motor (33) for driving the feed member, and the motion of the motor (33) can be transmitted to the feed member, and a second transmission path is provided in the transmission path. The second transmission mechanism (22, 22) provided with the clutch (32)
23, 24, 25, 32), and when the headstock releases the bar and retreats to the bar feeder side to grasp the bar,
While disconnecting the first clutch (26), the second clutch (32) is connected, and the drive shaft of the motor (33) is driven by a predetermined amount in the direction in which the bar is moved forward. The above-mentioned problem is solved by providing a control device (40) for holding the drive shafts at the same position.
【００１９】この発明によれば、主軸台（１１）が棒材
（３）を解放して後退する際には第１のクラッチ（２
６）の接続を解除しかつ第２のクラッチ（３２）を接続
しているので、モータ（３３）により送り部材（２０）
を主軸台から独立して駆動できる。この状態でモータ
（３３）の駆動軸を所定量駆動して送り部材に棒材が前
進する方向の送りを加えるので、棒材を旋盤（１）の主
軸台の前方に配置されるストッパ（１３）に突き当てて
棒材の後退を防止できる。しかも、モータ（３３）の駆
動量を所定量に制限し、その駆動後はモータの駆動軸を
同一位置に保持しているので、棒材の撓みを弾性範囲内
に制限することができる。According to the present invention, when the headstock (11) releases the bar (3) and retreats, the first clutch (2)
Since the connection of 6) is released and the second clutch (32) is connected, the feed member (20) is driven by the motor (33).
Can be driven independently of the headstock. In this state, the drive shaft of the motor (33) is driven by a predetermined amount to feed the feed member in the direction in which the bar advances, so that the bar is moved to the stopper (13) disposed in front of the headstock of the lathe (1). ) Can be prevented from retreating. In addition, since the drive amount of the motor (33) is limited to a predetermined amount and the drive shaft of the motor is kept at the same position after the drive, the bending of the bar can be limited to the elastic range.
【００２０】請求項７の発明では、請求項６記載の棒材
供給機において、制御装置（４０）は、主軸台（１１）
による棒材（３）の掴み換えの完了に伴って第１および
第２のクラッチ（２６，３２）をそれぞれ接続が解除さ
れた状態に一旦保持し、その後に第１のクラッチ（２
６）を接続する。According to a seventh aspect of the present invention, in the bar feeder according to the sixth aspect, the control device (40) includes the headstock (11).
The first and second clutches (26, 32) are temporarily held in the disconnected state, respectively, with the completion of the gripping of the bar (3) by the first clutch (2).
6) is connected.
【００２１】この発明によれば、棒材（３）の掴み換え
が完了した後に各クラッチ（２６，３２）の接続が解除
されるので、送り部材（２０）が主軸台（１１）やモー
タ（３３）によって拘束されることなく棒材の送り方向
後方に移動して棒材の撓みが解消される。これにより、
請求項２の発明と同様に棒材の撓みの蓄積を防止でき
る。According to the present invention, since the connection of each clutch (26, 32) is released after the gripping of the bar (3) is completed, the feed member (20) is connected to the headstock (11) or the motor ( 33), the bar is moved backward in the feed direction without being restrained, and the bending of the bar is eliminated. This allows
As in the second aspect of the invention, accumulation of bending of the bar can be prevented.
【００２２】請求項８の発明では、請求項７記載の棒材
供給機において、制御装置（４０）は、棒材（３）の掴
み換えの完了に伴って棒材を後退させる方向へモータ
（３３）の駆動軸を所定量駆動し、その後に第１および
第２のクラッチ（２６，３２）の接続をそれぞれ解除す
る。According to an eighth aspect of the present invention, in the bar feeder according to the seventh aspect, the control device (40) includes a motor (40) that moves the bar (3) backward in accordance with the completion of the gripping of the bar (3). The drive shaft of 33) is driven by a predetermined amount, and then the connection of the first and second clutches (26, 32) is released.
【００２３】この発明によれば、各クラッチ（２６，３
２）の接続が解除されるのに先立って、モータ（３３）
から第２の伝達機構を介して送り部材（２０）に棒材が
後退する方向への送りが加えられる。このため、請求項
３の発明と同様に棒材の送り部材（２０）が棒材の送り
方向後方へ確実に変位して棒材の撓みが解消される。According to the present invention, each clutch (26, 3)
Prior to the disconnection of 2), the motor (33)
Then, the feed in the direction in which the bar is retracted is applied to the feed member (20) via the second transmission mechanism. For this reason, similarly to the third aspect of the present invention, the bar feeding member (20) is reliably displaced rearward in the bar feeding direction, and the bending of the bar is eliminated.
【００２４】請求項９の発明では、請求項８記載の棒材
供給機において、前記第２の伝達機構は、緩衝材（３
４）を介して前記送り部材（２０）を後退させる。According to a ninth aspect of the present invention, in the bar feeder according to the eighth aspect, the second transmission mechanism includes a buffer member (3
The feed member (20) is retracted via 4).
【００２５】この発明によれば、第２の伝達機構が緩衝
材（３４）を介して送り部材（２０）を後退させるの
で、第２の伝達機構の送り部材（２０）に対する相対的
な変位を許容しながら送り部材（２０）を後退させるこ
とができる。このため、第２の伝達機構を後退させても
主軸台（１１）または送り部材（２０）から棒材（３）
が抜けるのを防止できる。According to the present invention, since the second transmission mechanism retreats the feed member (20) via the cushioning material (34), the relative displacement of the second transmission mechanism with respect to the feed member (20) is reduced. The feed member (20) can be retracted while allowing. For this reason, even if the second transmission mechanism is retracted, the bar (3) can be moved from the headstock (11) or the feed member (20).
Can be prevented from coming off.
【００２６】請求項１０の発明は、前進および後退が可
能な主軸台（１１）を備えた旋盤（１）に対して主軸台
の後方から前方に向けて棒材（３）を供給する棒材供給
機（２）に適用される。そして、棒材の送り方向後端部
を保持しつつ棒材と一体に進退可能に設けられた送り部
材（２０）と、送り部材を棒材の送り方向に駆動するた
めの駆動装置（２１）とを具備し、駆動装置（２１）
は、一回の加工が終了して主軸台が棒材を掴み換えた後
でかつ次回の加工に移る前の段階で、送り部材（２０）
が棒材の送り方向に自由に移動できるように駆動装置
（２１）による送り部材の拘束を一旦解除することによ
り、上述した課題を解決する。According to a tenth aspect of the present invention, there is provided a bar material for supplying a bar material (3) to a lathe (1) having a headstock (11) capable of moving forward and backward from the rear to the front of the headstock. Applied to feeder (2). A feed member (20) provided so as to be able to move forward and backward integrally with the bar while holding a rear end portion of the bar in the feed direction, and a driving device (21) for driving the feed member in the feed direction of the bar. And a driving device (21)
In the stage after the end of one machining and the headstock grips the bar and before moving to the next machining, the feed member (20)
The above-mentioned problem is solved by once releasing the constraint of the feed member by the driving device (21) so that the feed member can freely move in the feed direction of the bar.
【００２７】この発明によれば、一回の加工が終了して
棒材の掴み換えが行われると、駆動装置（２１）による
送り部材（２０）の拘束が一旦解除され、その解除に伴
って棒材の送り部材が棒材の送り方向後方に移動して棒
材の撓みが解消される。従って、棒材の撓みの蓄積を防
止できる。According to the present invention, once the machining is completed and the bar is re-gripped, the restraining of the feed member (20) by the driving device (21) is once released, and with the release. The bar feed member moves rearward in the feed direction of the bar, and the bending of the bar is eliminated. Therefore, accumulation of bending of the bar can be prevented.
【００２８】請求項１１の発明は、前進および後退が可
能な主軸台（１１）を備えた旋盤（１）に対して主軸台
の後方から前方に向けて棒材（３）を供給する棒材供給
機（２）に適用される。そして、棒材の送り方向後端部
を保持しつつ棒材と一体に進退可能に設けられた送り部
材（２０）と、主軸台の前進および後退に連係して送り
部材が棒材の送り方向に移動するように主軸台の運動を
送り部材に伝達可能であり、その伝達経路には第１のク
ラッチ（２６）が設けられた第１の伝達機構（２２，２
３，２４，２５，２６，２７，２８）と、送り部材を駆
動するためのモータ（３３）と、モータ（３３）の運動
を送り部材に伝達可能であり、その伝達経路には第２の
クラッチ（３２）が設けられた第２の伝達機構（２２，
２３，２４，２５，３２）と、一回の加工が終了して主
軸台が棒材を掴み換えた後に第１および第２のクラッチ
（２６，３２）の接続を一旦解除し、その後に第１のク
ラッチ（２６）を接続する制御装置（４０）とを備えた
ことにより、上述した課題を解決する。According to an eleventh aspect of the present invention, there is provided a bar material for supplying a bar material (3) to a lathe (1) having a headstock (11) capable of moving forward and backward from the rear to the front of the headstock. Applied to feeder (2). A feed member (20) provided integrally with the bar so as to be able to advance and retreat while holding the rear end portion in the feed direction of the bar, and the feed member is moved in the feed direction of the bar in conjunction with advance and retreat of the headstock. And a first transmission mechanism (22, 2) provided with a first clutch (26) on the transmission path.
3, 24, 25, 26, 27, 28), a motor (33) for driving the feed member, and the motion of the motor (33) can be transmitted to the feed member, and a second transmission path is provided in the transmission path. The second transmission mechanism (22, 22) provided with the clutch (32)
23, 24, 25, 32), after one machining is completed and the headstock grips the bar, the connection of the first and second clutches (26, 32) is once released, and then the By providing the control device (40) for connecting the one clutch (26), the above-described problem is solved.
【００２９】この発明によれば、一回の加工が終了して
棒材（３）の掴み換えが行われると第１のクラッチ（２
６）および第２のクラッチ（３２）の双方の接続が一旦
解除され、棒材の送り部材（２０）が主軸台（１１）や
モータ（３３）に拘束されることなく棒材の送り方向後
方に移動して棒材の撓みが解消される。従って、棒材の
撓みの蓄積を防止できる。According to the present invention, when one process is completed and the bar (3) is re-gripped, the first clutch (2)
6) The connection of both the second clutch (32) and the second clutch (32) is temporarily released, and the feed member (20) of the bar is rearward in the feed direction of the bar without being restrained by the headstock (11) or the motor (33). And the bending of the bar is eliminated. Therefore, accumulation of bending of the bar can be prevented.
【００３０】[0030]
【発明の実施の形態】図１は本発明が適用された棒材供
給機の一実施形態を示す斜視図である。この図に示すよ
うに、棒材供給機２は旋盤１に隣接して設置されてい
る。旋盤１は、ベッド１０と、そのベッド１０上に載置
されて前進（矢印Ａ方向）および後退（矢印Ｂ方向）が
可能な主軸台１１と、主軸台１１に取り付けられた主軸
１２とを有している。主軸１２の中心線は主軸台１１の
移動方向と平行であり、主軸１２は不図示の駆動装置に
よりその中心線の周りに回転駆動される。主軸１２の中
心線上には棒材３が通過可能なセンタ穴（不図示）が設
けられ、そのセンタ穴の前端部（図１の右端部）には棒
材３を掴むためのチャック（不図示）が装着されてい
る。主軸１２の前方には、棒材３の移動経路に対して出
没自在なストッパ１３が設けられている。ストッパ１３
としては、例えば棒材３を加工するための突切りバイト
等の切削工具が使用できる。FIG. 1 is a perspective view showing an embodiment of a bar feeder to which the present invention is applied. As shown in this figure, the bar feeder 2 is installed adjacent to the lathe 1. The lathe 1 has a bed 10, a headstock 11 placed on the bed 10 and capable of moving forward (in the direction of arrow A) and retreating (in the direction of arrow B), and a spindle 12 attached to the headstock 11. are doing. The center line of the main shaft 12 is parallel to the moving direction of the headstock 11, and the main shaft 12 is driven to rotate around the center line by a driving device (not shown). A center hole (not shown) through which the bar 3 can pass is provided on the center line of the main shaft 12, and a chuck (not shown) for gripping the bar 3 is provided at the front end (the right end in FIG. 1) of the center hole. ) Is attached. A stopper 13 is provided in front of the main shaft 12 so as to be able to come and go with respect to the movement path of the bar 3. Stopper 13
For example, a cutting tool such as a parting-off tool for processing the bar 3 can be used.
【００３１】一方、棒材供給機２は、棒材３の送り部材
としてのフィードパイプ２０と、そのフィードパイプ２
０を駆動する駆動装置２１と、駆動装置２１の動作を制
御するコントローラ（制御装置）４０とを有している。
フィードパイプ２０は不図示のガイドパイプによって旋
盤１の主軸１２と同軸に支持され、駆動装置２１により
そのガイドパイプに沿って前後に往復駆動される。フィ
ードパイプ２０の先端には棒材３の後端部を掴むための
フィンガーチャック２０ａが設けられている。On the other hand, the bar feeder 2 includes a feed pipe 20 as a feed member for the bar 3 and a feed pipe 2.
It has a drive device 21 for driving the drive device 0 and a controller (control device) 40 for controlling the operation of the drive device 21.
The feed pipe 20 is supported coaxially with the main shaft 12 of the lathe 1 by a guide pipe (not shown), and is reciprocated back and forth along the guide pipe by a driving device 21. At the tip of the feed pipe 20, a finger chuck 20a for grasping the rear end of the bar 3 is provided.
【００３２】駆動装置２１は、棒材３の移動方向に距離
を隔てて並べられた一対のプーリ２２，２３と、それら
プーリ２２，２３の間に巻き掛けられたエンドレスのタ
イミングベルト２４と、タイミングベルト２４とフィー
ドパイプ２０の後端とを連結する連結部材２５とを有し
ている。タイミングベルト２４と連結部材２５とは緩衝
材３４を介して連結される。前側のプーリ２２は電磁ク
ラッチ（第１のクラッチ）２６を介してプーリ２７と同
軸に連結されている。プーリ２７にはタイミングベルト
２８が巻き掛けられている。タイミングベルト２８の一
端側は主軸台１１の側面に設けられたベルト取付部材１
４と連結され、タイミングベルト２８の他端側はアイド
ルプーリ２９に巻き掛けられた上でコイルばね３０の一
端と連結されている。コイルばね３０は適度に伸ばされ
た状態で棒材供給機２の不図示のフレームに固定されて
おり、このコイルばね３０の復元力によりタイミングベ
ルト２８に適切な張力が付与される。後側のプーリ２３
は電磁クラッチ（第２のクラッチ）３２を介してパルス
モータ３３の駆動軸（不図示）と接続されている。な
お、前側のプーリ２２はエンコーダ３１とも同軸に接続
されている。エンコーダ３１はプーリ２２の回転量に比
例した数のパルス信号を出力する。このエンコーダ３１
の出力信号はフィードパイプ２０の位置の特定等に使用
される。The driving device 21 includes a pair of pulleys 22 and 23 arranged at a distance in the moving direction of the bar 3, an endless timing belt 24 wound between the pulleys 22 and 23, It has a connecting member 25 for connecting the belt 24 and the rear end of the feed pipe 20. The timing belt 24 and the connecting member 25 are connected via a buffer material 34. The front pulley 22 is coaxially connected to a pulley 27 via an electromagnetic clutch (first clutch) 26. A timing belt 28 is wound around the pulley 27. One end of the timing belt 28 is a belt mounting member 1 provided on a side surface of the headstock 11.
4, the other end of the timing belt 28 is wound around an idle pulley 29 and then connected to one end of a coil spring 30. The coil spring 30 is fixed to a frame (not shown) of the bar feeder 2 in an appropriately stretched state, and an appropriate tension is applied to the timing belt 28 by the restoring force of the coil spring 30. Rear pulley 23
Is connected to a drive shaft (not shown) of the pulse motor 33 via an electromagnetic clutch (second clutch) 32. The front pulley 22 is also coaxially connected to the encoder 31. The encoder 31 outputs a number of pulse signals proportional to the amount of rotation of the pulley 22. This encoder 31
Is used for specifying the position of the feed pipe 20 or the like.
【００３３】以上の駆動装置２１においては、電磁クラ
ッチ２６を接続しかつ電磁クラッチ３２の接続を解除す
ると、主軸台１１の運動がタイミングベルト２８、プー
リ２７，２２を介してタイミングベルト２４に伝達さ
れ、フィードパイプ２０が主軸台１１に連係して前後に
動作する。この状態が連係モードに相当し、タイミング
ベルト２８、プーリ２７、電磁クラッチ２６、プーリ２
２，２３、タイミングベルト２４および連結部材２５が
第１の伝達機構として機能する。一方、電磁クラッチ２
６の接続を解除し、電磁クラッチ３２を接続すると、主
軸台１１の動作に拘わりなくパルスモータ３３にてプー
リ２３を直接駆動してフィードパイプ２０を前後に移動
させることができる。この状態が非連係モードに相当
し、パルスモータ３３、電磁クラッチ３２、プーリ２
２，２３、タイミングベルト２４、緩衝材３４および連
結部材２５が第２の伝達機構として機能する。電磁クラ
ッチ２６，３２の双方の接続を解除すると主軸台１１お
よびパルスモータ３３に対してフィードパイプ２０が切
り離され、これらの抵抗を受けることなくフィードパイ
プ２０が前後に移動できるようになる。この状態が解除
モードに相当する。In the drive device 21 described above, when the electromagnetic clutch 26 is connected and the electromagnetic clutch 32 is disconnected, the movement of the headstock 11 is transmitted to the timing belt 24 via the timing belt 28 and the pulleys 27 and 22. The feed pipe 20 moves back and forth in cooperation with the headstock 11. This state corresponds to the link mode, in which the timing belt 28, the pulley 27, the electromagnetic clutch 26, the pulley 2
2, 23, the timing belt 24, and the connecting member 25 function as a first transmission mechanism. On the other hand, the electromagnetic clutch 2
6 and the electromagnetic clutch 32 is connected, the pulley 23 can be directly driven by the pulse motor 33 regardless of the operation of the headstock 11 to move the feed pipe 20 back and forth. This state corresponds to the non-coupling mode, in which the pulse motor 33, the electromagnetic clutch 32, the pulley 2
2, 23, the timing belt 24, the cushioning material 34, and the connecting member 25 function as a second transmission mechanism. When both the electromagnetic clutches 26 and 32 are disconnected, the feed pipe 20 is disconnected from the headstock 11 and the pulse motor 33, and the feed pipe 20 can move back and forth without receiving these resistances. This state corresponds to the release mode.
【００３４】電磁クラッチ２６，３２およびパルスモー
タ３３の動作はコントローラ４０によって制御される。
コントローラ４０と旋盤１に設けられたコントローラ１
５とは不図示のインターフェース回路を介して互いに接
続され、相互に信号伝達が可能とされている。各コント
ローラ１５，４０は棒材３の加工や送りに関する各種の
制御を実行する。The operations of the electromagnetic clutches 26 and 32 and the pulse motor 33 are controlled by the controller 40.
Controller 40 and controller 1 provided on lathe 1
5 are connected to each other via an interface circuit (not shown) so that signals can be transmitted to each other. The controllers 15 and 40 execute various controls related to processing and feeding of the bar 3.
【００３５】図２乃至図４は、タイミングベルト２４と
連結部材２５との間に介在される緩衝材３４を示したも
のである。図２は緩衝材３４の平面図を示し、図３は緩
衝材３４の正面図を示し、図４は図２のＡ−Ａ線断面図
を示す。緩衝材３４を介在することで、タイミングベル
ト２４を後退させる場合、タイミングベルト２４のフィ
ードパイプ２０に対する相対的な変位が許容される。こ
の緩衝材３４は、タイミングベルト２４にボルト接合さ
れるベルト結合板５０と、ベルト結合板５０に止めねじ
によって取付けられる一対の支点軸５２ａ，５２ｂと、
この一対の支点軸５２ａ，５２ｂに回転可能に取付けら
れると共に連結部材２５に結合されたスライド部材５１
と、支点軸５２ａに介装されるコイルスプリング５３
と、コイルスプリング５３を覆うケース５４とからな
る。FIGS. 2 to 4 show the cushioning member 34 interposed between the timing belt 24 and the connecting member 25. FIG. 2 shows a plan view of the cushioning material 34, FIG. 3 shows a front view of the cushioning material 34, and FIG. 4 shows a sectional view taken along line AA of FIG. When the timing belt 24 is retracted by interposing the cushioning material 34, relative displacement of the timing belt 24 with respect to the feed pipe 20 is allowed. The cushioning member 34 includes a belt connecting plate 50 bolted to the timing belt 24, a pair of fulcrum shafts 52 a and 52 b attached to the belt connecting plate 50 by set screws,
A slide member 51 rotatably attached to the pair of fulcrum shafts 52a and 52b and coupled to the coupling member 25.
And a coil spring 53 interposed on the fulcrum shaft 52a
And a case 54 that covers the coil spring 53.
【００３６】タイミングベルト２４に結合されるベルト
結合板５０には、長手方向両端に膨出部５０ａ，５０ｂ
が形成される。この一対の膨出部５０ａ，５０ｂそれぞ
れに、支点軸５２ａ，５２ｂが頭部５５ａ，５５ｂを内
側に向けた状態で固定される。一対の支点軸５２ａ，５
２ｂに回転可能に支持されるスライド部材５１は、両端
に耳部５１ａ，５１ｂを有し、この耳部５１ａ，５１ｂ
が支点軸５２ａ，５２ｂに嵌め込まれる。スライド部材
５１は支点軸５２ａ，５２ｂの回りを回転可能にされる
と共に、支点軸５２ａ，５２ｂの軸方向にスライド可能
にされる。支点軸５２ａには、ケース５４に収められた
コイルスプリング５３が介装される。このコイルスプリ
ング５３によってスライド部材５１の耳部５１ａが膨出
部５０ａに付勢される。耳部５１ａが膨出部５０ａに付
勢されると、耳部５１ａとケース５４との間には０．５
ｍｍ程度の僅かな隙間Ｗ１が開く。一方、耳部５１ｂと
膨出部５０ｂとの間にはＷ１よりも大きい隙間Ｗ２が開
く。The belt connecting plate 50 connected to the timing belt 24 has bulging portions 50a and 50b at both ends in the longitudinal direction.
Is formed. The fulcrum shafts 52a and 52b are fixed to the pair of bulges 50a and 50b, respectively, with the heads 55a and 55b facing inward. A pair of fulcrum shafts 52a, 5
The slide member 51 rotatably supported by 2b has ears 51a, 51b at both ends, and the ears 51a, 51b.
Are fitted to the fulcrum shafts 52a and 52b. The slide member 51 is rotatable around the fulcrum shafts 52a and 52b, and is slidable in the axial direction of the fulcrum shafts 52a and 52b. A coil spring 53 housed in a case 54 is interposed on the fulcrum shaft 52a. The ear 51a of the slide member 51 is urged by the coil spring 53 toward the bulging portion 50a. When the ear portion 51a is urged by the bulging portion 50a, a gap between the ear portion 51a and the case 54 is 0.5.
A slight gap W1 of about mm is opened. On the other hand, a gap W2 larger than W1 is opened between the ear portion 51b and the bulging portion 50b.
【００３７】フィードパイプ２０を前進させるべくタイ
ミングベルトを図２中ａ方向に移動させた場合、スライ
ド部材５１の耳部５１ａが膨出部５０ａに付勢されてい
るので、スライド部材５１もタイミングベルト２４と共
に図中ａ方向に等しい量移動する。スライド部材５１に
連結部材２５を介して固定されたフィードパイプ２０も
タイミングベルト２４と等しい量前進する。When the timing belt is moved in the direction a in FIG. 2 in order to advance the feed pipe 20, since the ears 51a of the slide member 51 are urged by the bulging portion 50a, the slide member 51 is also moved by the timing belt. 24 and an equal amount in the direction a in the figure. The feed pipe 20 fixed to the slide member 51 via the connecting member 25 also advances by the same amount as the timing belt 24.
【００３８】一方、フィードパイプ２０を後退させるべ
くタイミングベルト２４を図中ｂ方向に僅かに移動させ
た場合、スライド部材５１は隙間Ｗ１の範囲内でスライ
ド可能な状態になっているので、タイミングベルト２４
のフィードパイプ２０に対する相対的な変位を許容しな
がらフィードパイプ２０が後退する。すなわち、主軸台
１１に棒材３が掴まれ、フィードパイプ２０が所定量後
退できない場合でもタイミングベルト２４を所定量後退
させることができる。ここで、スライド部材５１は、コ
イルスプリング５３のばね力に抗してスライドする。On the other hand, when the timing belt 24 is slightly moved in the direction b in the drawing to retreat the feed pipe 20, the slide member 51 is slidable within the gap W1. 24
The feed pipe 20 is retracted while allowing the relative displacement of the feed pipe 20 with respect to the feed pipe 20. That is, even when the rod 3 is gripped by the headstock 11 and the feed pipe 20 cannot be retracted by the predetermined amount, the timing belt 24 can be retracted by the predetermined amount. Here, the slide member 51 slides against the spring force of the coil spring 53.
【００３９】図４は、一回の加工が完了した時点から次
回の加工が終了するまでにコントローラ１５，４０がそ
れぞれ実行する加工サイクル管理および棒材送り管理の
手順を示すフローチャートである。FIG. 4 is a flow chart showing the procedure of the machining cycle management and the bar feed management executed by the controllers 15 and 40 from the time when one machining is completed to the time when the next machining is completed.
【００４０】旋盤１のコントローラ１５は、棒材３の一
回の加工が完了するとまず棒材３の前端に突き当たるよ
うにストッパ１３を挿入する（ステップＳ１）。続い
て、主軸１２のチャックを開くとともに、棒材供給機２
のコントローラ４０に対してチャック開信号を出力する
（ステップＳ２）。この後、チャックの開動作が完了す
るまで待ってから主軸台１１の後退動作を開始させ（ス
テップＳ３→Ｓ４）、さらに主軸台１１が所定量後退す
るとチャックを閉じ（ステップＳ５→Ｓ６）、その閉動
作が完了するとコントローラ４０に対してチャック閉信
号を出力する（ステップＳ７→Ｓ８）。この後、ストッ
パ１３を棒材３の前方から後退させ（ステップＳ９）、
続いて棒材３の加工を開始する（ステップＳ１０）。棒
材３の加工は所定のプログラムに従って実行され、その
加工が完了すると再びストッパ１３を挿入する（ステッ
プＳ１１→Ｓ１）。なお、以上の制御手順ではステップ
Ｓ２が掴み換え開始、ステップＳ８が掴み換え完了にそ
れぞれ相当する。When one process of the bar 3 is completed, the controller 15 of the lathe 1 first inserts the stopper 13 so as to abut the front end of the bar 3 (step S1). Subsequently, the chuck of the spindle 12 is opened, and the bar feeder 2 is opened.
Output a chuck open signal to the controller 40 (step S2). Thereafter, after waiting until the chuck opening operation is completed, the retreat operation of the headstock 11 is started (steps S3 → S4), and when the headstock 11 retreats by a predetermined amount, the chuck is closed (steps S5 → S6). When the closing operation is completed, a chuck closing signal is output to the controller 40 (step S7 → S8). Thereafter, the stopper 13 is retracted from the front of the bar 3 (step S9),
Subsequently, the processing of the bar 3 is started (step S10). The processing of the bar 3 is executed according to a predetermined program, and when the processing is completed, the stopper 13 is inserted again (step S11 → S1). In the above control procedure, step S2 corresponds to the start of gripping, and step S8 corresponds to the completion of gripping.
【００４１】一方、棒材供給機２のコントローラ４０
は、まず旋盤１側からチャック開信号が出力されるまで
待機し（ステップＳ２１）、これが出力されると前側の
電磁クラッチ２６の接続を解除し、後側の電磁クラッチ
３２を接続する（ステップＳ２２）。この後、ドライバ
４１（図１参照）を介してパルスモータ３３の駆動軸を
所定パルス数だけ正転させる（ステップＳ２３）。ここ
で、所定パルス数とは例えば１パルスに設定される。な
お、このパルス数はエンコーダ３１から出力されるパル
ス数を意味しない。すなわち、エンコーダ３１から所定
数のパルス信号が出力されるようにパルスモータ３３を
駆動するのではなく、予め定められたパルス数、例えば
３パルスだけパルスモータ３３の駆動軸を駆動するだけ
であり、その結果としてエンコーダ３１から出力される
パルス信号はモータ３３の制御に使用していない。On the other hand, the controller 40 of the bar feeder 2
First waits until a chuck opening signal is output from the lathe 1 (step S21), and when this signal is output, disconnects the front electromagnetic clutch 26 and connects the rear electromagnetic clutch 32 (step S22). ). Thereafter, the drive shaft of the pulse motor 33 is rotated forward by a predetermined number of pulses via the driver 41 (see FIG. 1) (step S23). Here, the predetermined number of pulses is set to, for example, one pulse. The number of pulses does not mean the number of pulses output from the encoder 31. That is, instead of driving the pulse motor 33 so that a predetermined number of pulse signals are output from the encoder 31, only the drive shaft of the pulse motor 33 is driven by a predetermined number of pulses, for example, three pulses. As a result, the pulse signal output from the encoder 31 is not used for controlling the motor 33.
【００４２】パルスモータ３３の駆動軸の正転に応じて
フィードパイプ２０が旋盤１側に僅かに送り出され、棒
材３の前端がストッパ１３に押し当てられる。このと
き、棒材３に弾性限度を越える撓みが生じないようにパ
ルスモータ３３の駆動パルス数が制限される。但し、パ
ルスモータ３３の駆動量が小さすぎると、その送りが駆
動装置２１に存在する遊び等に吸収されて棒材３まで伝
達されないおそれがある。従って、パルスモータ３３の
駆動量は駆動装置２１に存在する遊び等の大小に拘わら
ず棒材３まで確実に送りを伝えることができる範囲で可
能な限り小さく設定することが望ましい。具体的には、
直径０．８〜２ｍｍ程度の小径の棒材３に対してフィー
ドパイプ２０が０．５ｍｍまたはそれ以下の範囲で前進
する程度でパルスモータ３３を正転させればよい。The feed pipe 20 is slightly fed to the lathe 1 in accordance with the forward rotation of the drive shaft of the pulse motor 33, and the front end of the bar 3 is pressed against the stopper 13. At this time, the number of drive pulses of the pulse motor 33 is limited so that the bar 3 does not bend beyond the elastic limit. However, if the driving amount of the pulse motor 33 is too small, the feed may be absorbed by the play existing in the driving device 21 and may not be transmitted to the bar 3. Therefore, it is desirable to set the drive amount of the pulse motor 33 as small as possible within a range where the feed can be reliably transmitted to the bar 3 regardless of the size of play or the like existing in the drive device 21. In particular,
The pulse motor 33 may be rotated normally so that the feed pipe 20 advances in the range of 0.5 mm or less with respect to the small-diameter rod 3 having a diameter of about 0.8 to 2 mm.
【００４３】パルスモータ３３を所定量だけ正転させた
後は、続いてパルスモータ３３の駆動軸をその駆動後の
位置に保持する（ステップＳ２４）。これにより、パル
スモータ３３にて棒材３を押し続ける場合と異なって、
棒材３に過剰な送り力が加わるおそれがなくなる。After the pulse motor 33 is rotated forward by a predetermined amount, the drive shaft of the pulse motor 33 is held at the position after the drive (step S24). Thus, unlike the case where the rod 3 is continuously pushed by the pulse motor 33,
There is no possibility that an excessive feed force is applied to the bar 3.
【００４４】パルスモータ３３の保持は、旋盤１のコン
トローラ１５からチャック閉信号が出力されるまで継続
する（ステップＳ２５）。そして、チャック閉信号が出
力されたならばパルスモータ３３の駆動軸を所定パルス
数だけ逆転させる（ステップＳ２６）。ここで、所定パ
ルス数とは例えば３パルスに設定される。この逆転によ
りフィードパイプ２０が旋盤１から離れるように後退し
て棒材３が真っ直ぐな状態に戻される。この処理は、特
に剛性が低くて真っ直ぐな状態への復元力が小さい小径
の棒材３に対して効果的である。フィードパイプ２０と
タイミングベルト２４との間には緩衝材３４が介在され
るので、タイミングベルト２４のフィードパイプ２０に
対する相対的な変位を許容しながらフィードパイプ２０
が後退する。このため、タイミングベルト２４を所定量
後退させても、主軸台１１または送り部材２０から棒材
３が抜けるのを防止できる。なお、このときのパルス数
も、ステップＳ２３の場合と同じくエンコーダ３１の出
力パルス数を意味しない。また、ステップＳ２３におけ
るパルス数とステップＳ２６におけるパルス数とは同一
である必要はなく、それぞれに適切な値を設定してよ
い。The holding of the pulse motor 33 is continued until the chuck closing signal is output from the controller 15 of the lathe 1 (step S25). Then, when the chuck closing signal is output, the drive shaft of the pulse motor 33 is reversely rotated by a predetermined number of pulses (step S26). Here, the predetermined number of pulses is set to, for example, three pulses. Due to this reverse rotation, the feed pipe 20 is retracted away from the lathe 1 and the bar 3 is returned to a straight state. This process is particularly effective for a small-diameter bar 3 having a low rigidity and a small restoring force to a straight state. Since the cushioning material 34 is interposed between the feed pipe 20 and the timing belt 24, the feed pipe 20 is allowed while allowing the relative displacement of the timing belt 24 with respect to the feed pipe 20.
Retreats. For this reason, even if the timing belt 24 is retracted by a predetermined amount, the bar 3 can be prevented from coming off from the headstock 11 or the feed member 20. Note that the number of pulses at this time does not mean the number of pulses output from the encoder 31 as in the case of step S23. The number of pulses in step S23 and the number of pulses in step S26 do not need to be the same, and an appropriate value may be set for each.
【００４５】パルスモータ３３の逆転後は後側の電磁ク
ラッチ３２の接続を解除し（ステップＳ２７）、続けて
コントローラ４０に内蔵されたタイマーをオンしてその
タイムアップまで電磁クラッチ３２の接続解除を継続す
る（ステップＳ２８、Ｓ２９）。この間、駆動装置２１
は電磁クラッチ２６，３２の双方の接続が解除された解
除モードとなり、フィードパイプ２０は棒材３等に蓄え
られたストレスにを解消するように変位する。フィード
パイプ２０とタイミングベルト２４との間に設けられた
緩衝材３４も、タイミングベルト２４のフィードパイプ
２０に対する相対的な変位を許容すべくコイルスプリン
グ５３が縮られた状態から初期の状態に復帰する。これ
により、棒材３が掴み換えられる毎に棒材３や駆動装置
２１内に蓄えられたストレスが解消され、棒材３に撓み
が蓄積されるおそれがなくなる。なお、タイマーのセッ
ト時間はごく短時間（例えば０．２秒前後）でよく、こ
れらの処理が終わるまで旋盤１側で待機する必要はな
い。従って、解除モードの追加により加工サイクルが長
時間化するおそれはない。After the reverse rotation of the pulse motor 33, the connection of the electromagnetic clutch 32 on the rear side is released (step S27). Subsequently, the timer built in the controller 40 is turned on to release the connection of the electromagnetic clutch 32 until the time is up. Continue (steps S28 and S29). During this time, the driving device 21
Is in a release mode in which both the electromagnetic clutches 26 and 32 are released, and the feed pipe 20 is displaced so as to eliminate the stress stored in the bar 3 or the like. The cushioning member 34 provided between the feed pipe 20 and the timing belt 24 also returns from the contracted state of the coil spring 53 to the initial state to allow the relative displacement of the timing belt 24 with respect to the feed pipe 20. . Thus, the stress stored in the bar 3 and the driving device 21 each time the bar 3 is grasped is relieved, and there is no possibility that bending is accumulated in the bar 3. The setting time of the timer may be very short (for example, about 0.2 seconds), and there is no need to wait on the lathe 1 side until these processes are completed. Therefore, there is no possibility that the processing cycle is extended by the addition of the release mode.
【００４６】ステップＳ２９でタイムアップした後は前
側の電磁クラッチ２６を接続する（ステップＳ３０）。
これにより、フィードパイプ２０が主軸台１１に連係し
て前後に移動可能となる。この状態は次回の加工が終了
して旋盤１からチャック開信号が出力されるまで継続さ
れる。After the time is up in step S29, the front electromagnetic clutch 26 is connected (step S30).
This allows the feed pipe 20 to move back and forth in cooperation with the headstock 11. This state is maintained until the next machining is completed and the lathe 1 outputs a chuck open signal.
【００４７】本発明は以上の実施形態に限定されること
なく、種々の形態で実施してよい。例えば、電磁クラッ
チは各種の機械的クラッチに置換できる。伝達機構はタ
イミングベルトに代えてチェーンやギア等の各種の伝達
要素を用いたものに置換できる。クラッチの切り換えに
よって駆動装置を連係モード、非連係モード、解除モー
ドの間で切り換える構成に限らず、例えばモータ３３を
主軸台１１に同期して駆動するモードと、同期せずに駆
動するモードと、その駆動軸を拘束せずに自由に回転可
能にするモードとの間で電気的に切り換え制御する棒材
供給機にも本発明は適用できる。The present invention is not limited to the above embodiments, but may be embodied in various forms. For example, the electromagnetic clutch can be replaced with various mechanical clutches. The transmission mechanism can be replaced with a mechanism using various transmission elements such as a chain and a gear instead of the timing belt. The present invention is not limited to a configuration in which the drive device is switched between the linked mode, the non-linked mode, and the release mode by switching the clutch. For example, a mode in which the motor 33 is driven in synchronization with the headstock 11, The present invention is also applicable to a bar feeder that electrically controls switching between a mode in which the drive shaft can be freely rotated without restraining the drive shaft.
【００４８】[0048]
【発明の効果】以上に説明したように、本発明の棒材供
給機によれば、棒材の掴み換えのために旋盤の主軸台が
棒材を解放した際に、駆動装置から棒材の送り部材に対
して送りを加えるとともにその送りを所定量に制限して
いるので、棒材の撓みを弾性範囲内に抑えつつ棒材の前
端を旋盤のストッパに軽度に押し当てて棒材の後退を防
止できる。これにより棒材の位置のずれによる加工不良
を防止できる。As described above, according to the bar feeder of the present invention, when the headstock of the lathe releases the bar for gripping the bar, the bar is released from the driving device. Since the feed is applied to the feed member and the feed is limited to a predetermined amount, the front end of the bar is slightly pressed against the stopper of the lathe while the deflection of the bar is kept within the elastic range, and the bar is retracted. Can be prevented. As a result, it is possible to prevent processing defects due to the displacement of the bar.
【００４９】また、本発明では、一回の加工が終了して
棒材の掴み換えが完了した際に送り部材と駆動装置との
接続を断ち切って棒材の撓みが解消されるように送り部
材を変位させているので、掴み換えと加工とを繰り返し
ても棒材に撓みが蓄積されない。特に、掴み換え後に棒
材の送り部材に後退方向の送りを与えた場合には、細く
て剛性が低く撓みに対する復元力が小さい棒材を使用す
る場合でも確実にその撓みを解消させることができる。
これにより撓みが蓄積された状態で棒材が回転すること
による振動、騒音の拡大を防止して、加工中における棒
材の回転が常に安定する。Further, according to the present invention, the feed member is disconnected from the driving device by cutting off the connection between the feed member and the driving device when one process is completed and the re-gripping of the bar is completed. Is displaced, so that bending is not accumulated in the bar material even if gripping and processing are repeated. In particular, in the case where the feed member of the bar is fed in the retreating direction after the gripping, the bending can be reliably eliminated even when using a bar which is thin, has low rigidity, and has a small restoring force against bending. .
This prevents vibration and noise from being increased due to the rotation of the bar in a state where the deflection is accumulated, and the rotation of the bar during machining is always stabilized.
【００５０】従って、本発明の棒材供給機によれば、棒
材をその加工当初から残材となるまで正確に供給して効
率よく加工を行うことができる。Therefore, according to the bar feeder of the present invention, it is possible to feed the bar accurately from the beginning of processing to the remaining material and efficiently process the bar.
【図１】本発明が適用された棒材供給機と旋盤との関係
を示す斜視図。FIG. 1 is a perspective view showing the relationship between a bar feeder to which the present invention is applied and a lathe.
【図２】緩衝材を示す平面図。FIG. 2 is a plan view showing a cushioning material.
【図３】緩衝材を示す正面図。FIG. 3 is a front view showing a cushioning material.
【図４】図２のＡ−Ａ線断面図。FIG. 4 is a sectional view taken along line AA of FIG. 2;
【図５】図１の旋盤および棒材供給機のそれぞれのコン
トローラにて実行される処理の手順を示すフローチャー
ト。FIG. 5 is a flowchart showing a procedure of processing executed by respective controllers of the lathe and the bar feeder of FIG. 1;
１ 旋盤 ２ 棒材供給機 ３ 棒材 １１ 主軸台 １２ 主軸 １３ ストッパ １４ ベルト取付部材 １５ コントローラ ２０ フィードパイプ ２１ 駆動装置 ２２ プーリ ２２，２３ プーリ ２３ プーリ ２４ ベルト ２５ 連結部材 ２６ 電磁クラッチ（第１のクラッチ） ２７ プーリ ２８ ベルト ２９ アイドルプーリ ３０ コイルばね ３１ エンコーダ ３２ 電磁クラッチ（第２のクラッチ） ３３ パルスモータ ３４ 緩衝材 ４０ コントローラ（制御装置） ４１ ドライバ DESCRIPTION OF SYMBOLS 1 Lathe 2 Bar feeder 3 Bar 11 Headstock 12 Main shaft 13 Stopper 14 Belt mounting member 15 Controller 20 Feed pipe 21 Drive unit 22 Pulley 22, 23 Pulley 23 Pulley 24 Belt 25 Connecting member 26 Electromagnetic clutch (first clutch) ) 27 pulley 28 belt 29 idle pulley 30 coil spring 31 encoder 32 electromagnetic clutch (second clutch) 33 pulse motor 34 cushioning material 40 controller (control device) 41 driver
Claims (11)
旋盤に対して前記主軸台の後方から前方に向けて棒材を
供給する棒材供給機において、 前記棒材の送り方向後端部を保持しつつ前記棒材と一体
に進退可能に設けられた送り部材と、 前記送り部材を前記棒材の送り方向に駆動するために設
けられ、前記主軸台の前進および後退に連係して前記送
り部材を前記棒材の送り方向に移動させる連係モード
と、前記主軸台から独立して前記送り部材を駆動する非
連係モードとの間で動作状態を切り換え可能な駆動装置
と、 前記棒材を掴み換えるために前記主軸台が前記棒材を解
放して前記棒材供給機側へ後退する際に、前記駆動装置
を前記非連係モードに切り換えるとともに、前記棒材が
前進する方向に前記駆動装置が所定量駆動され、かつそ
の駆動後は前記駆動装置によって前記送り部材が定位置
に拘束されるように前記駆動装置の動作を制御する制御
装置と、を備えたことを特徴とする棒材供給機。1. A bar feeder for feeding a bar from a rear side of the headstock to a lathe provided with a headstock capable of moving forward and backward, wherein a rear end of the bar in the feed direction is provided. A feed member provided so as to be able to advance and retreat with the bar material while holding the rod member, provided to drive the feed member in a feed direction of the bar material, and linked to advance and retreat of the headstock, A drive device capable of switching an operation state between a linked mode in which a feed member is moved in a feed direction of the bar and a non-linked mode in which the feed member is driven independently of the headstock; and When the headstock releases the bar and retreats to the bar feeder side for gripping, the drive device is switched to the non-cooperative mode, and the drive device is moved in a direction in which the bar advances. Is driven by a predetermined amount, and And a control device that controls the operation of the driving device so that the feed member is restrained at a fixed position by the driving device after driving.
動装置によって拘束されることなく前記棒材の送り方向
に自由に移動できるように前記駆動装置と前記送り部材
との接続を解除する解除モードに切り換え可能であり、 前記制御装置は、前記主軸台による前記棒材の掴み換え
の完了に伴って前記駆動装置を前記解除モードに一旦切
り換え、その後に前記駆動装置を前記連係モードへと切
り換えることを特徴とする請求項１記載の棒材供給機。2. The release device according to claim 1, wherein said drive device releases said connection between said drive device and said feed member so that said feed member can move freely in the feed direction of said bar without being restrained by said drive device. The control device switches the driving device to the release mode once the gripping of the bar by the headstock is completed, and then switches the driving device to the linkage mode. The bar feeder according to claim 1, wherein:
完了後、前記棒材が後退する方向に前記駆動装置を所定
量駆動し、その後に前記解除モードへの切り換えを実行
することを特徴とする請求項２記載の棒材供給機。3. The control device according to claim 1, wherein after the gripping of the bar is completed, the control device drives the driving device by a predetermined amount in a direction in which the bar retreats, and then executes switching to the release mode. The bar feeder according to claim 2, characterized in that:
り部材を後退させることを特徴とする請求項３記載の棒
材供給機。4. The bar feeder according to claim 3, wherein the driving device retreats the feed member via a cushioning material.
記送り部材へ伝達する第１の伝達機構と、前記送り部材
を駆動するための駆動源と、前記駆動源の運動を前記送
り部材に伝達する第２の伝達機構とを具備し、前記第１
および前記第２の伝達機構には、それぞれの運動伝達経
路の接続および接続解除を切り換える第１および第２の
クラッチが設けられていることを特徴とする請求項１〜
３のいずれかに記載の棒材供給機。5. A driving device comprising: a first transmission mechanism for transmitting a movement of the headstock to the feed member; a drive source for driving the feed member; and a drive source for driving the drive source. And a second transmission mechanism for transmitting to the first
The first transmission mechanism and the second transmission mechanism are provided with first and second clutches for switching connection and disconnection of respective motion transmission paths.
3. The bar feeder according to any one of 3.
旋盤に対して前記主軸台の後方から前方に向けて棒材を
供給する棒材供給機において、 前記棒材の送り方向後端部を保持しつつ前記棒材と一体
に進退可能に設けられた送り部材と、 前記主軸台の前進および後退に連係して前記送り部材が
前記棒材の送り方向に移動するように前記主軸台の運動
を前記送り部材に伝達可能であり、その伝達経路には第
１のクラッチが設けられた第１の伝達機構と、 前記送り部材を駆動するためのモータと、 前記モータの運動を前記送り部材に伝達可能であり、そ
の伝達経路には第２のクラッチが設けられた第２の伝達
機構と、 前記棒材を掴み換えるために前記主軸台が前記棒材を解
放して前記棒材供給機側へ後退する際に、前記第１のク
ラッチの接続を解除する一方で前記第２のクラッチを接
続するとともに、前記棒材を前進させる方向へ前記モー
タの駆動軸を所定量駆動し、その後当該モータの駆動軸
を同一位置に保持する制御装置と、を備えたことを特徴
とする棒材供給機。6. A bar feeder for feeding a bar from a rear side of the headstock to a lathe provided with a headstock capable of moving forward and backward, wherein a rear end of the bar in the feed direction is provided. A feed member provided so as to be able to advance and retreat integrally with the bar while holding the headstock, the headstock of the headstock so that the feed member moves in the feed direction of the bar in conjunction with advance and retreat of the headstock. Movement can be transmitted to the feed member, and a first transmission mechanism provided with a first clutch in a transmission path thereof; a motor for driving the feed member; A second transmission mechanism provided with a second clutch in a transmission path thereof; and the headstock releases the bar to re-grip the bar, and the bar feeder is provided. When reversing to the side, the connection of the first clutch is A control device that connects the second clutch while driving the drive shaft of the motor by a predetermined amount in a direction in which the bar is advanced, and then holds the drive shaft of the motor at the same position. A bar feeder characterized by comprising:
棒材の掴み換えの完了に伴って、前記第１および第２の
クラッチをそれぞれ接続が解除された状態に一旦保持
し、その後に前記第１のクラッチを接続することを特徴
とする請求項６記載の棒材供給機。7. The control device temporarily holds the first and second clutches in a disconnected state, respectively, in accordance with completion of the gripping of the bar by the headstock, and thereafter, 7. The bar feeder according to claim 6, wherein the first clutch is connected.
完了に伴って前記棒材を後退させる方向へ前記モータの
駆動軸を所定量駆動し、その後に前記第１および第２の
クラッチの接続をそれぞれ解除することを特徴とする請
求項７記載の棒材供給機。8. The control device drives a drive shaft of the motor by a predetermined amount in a direction to retreat the bar with completion of the gripping of the bar, and thereafter, the first and second clutches 8. The bar feeder according to claim 7, wherein the connection of the bars is released.
前記送り部材を後退させることを特徴とする請求項８記
載の棒材供給機。9. The bar feeder according to claim 8, wherein the second transmission mechanism retreats the feed member via a buffer.
た旋盤に対して前記主軸台の後方から前方に向けて棒材
を供給する棒材供給機において、 前記棒材の送り方向後端部を保持しつつ前記棒材と一体
に進退可能に設けられた送り部材と、 前記送り部材を前記棒材の送り方向に駆動するための駆
動装置とを具備し、 前記駆動装置は、一回の加工が終了して前記主軸台が前
記棒材を掴み換えた後でかつ次回の加工に移る前の段階
で、前記送り部材が前記棒材の送り方向に自由に移動で
きるように前記駆動装置による前記送り部材の拘束を一
旦解除することを特徴とする棒材供給機。10. A bar feeder for feeding a bar from a rear side of the headstock to a front side of the lathe having a headstock capable of moving forward and backward, wherein a rear end of the bar in the feed direction is provided. A feed member provided so as to be able to move forward and backward integrally with the bar while holding the drive member, and a drive device for driving the feed member in the feed direction of the bar material, wherein the drive device is provided once. At the stage after the processing is completed and the headstock re-grasps the bar and before the next processing, the driving device controls the feed member so that the feed member can move freely in the feed direction of the bar. A bar feeder wherein the restraint of the feed member is temporarily released.
た旋盤に対して前記主軸台の後方から前方に向けて棒材
を供給する棒材供給機において、 前記棒材の送り方向後端部を保持しつつ前記棒材と一体
に進退可能に設けられた送り部材と、 前記主軸台の前進および後退に連係して前記送り部材が
前記棒材の送り方向に移動するように前記主軸台の運動
を前記送り部材に伝達可能であり、その伝達経路には第
１のクラッチが設けられた第１の伝達機構と、 前記送り部材を駆動するためのモータと、 前記モータの運動を前記送り部材に伝達可能であり、そ
の伝達経路には第２のクラッチが設けられた第２の伝達
機構と、 一回の加工が終了して前記主軸台が前記棒材を掴み換え
た後に前記第１および第２のクラッチの接続を一旦解除
し、その後に前記第１のクラッチを接続する制御装置
と、を備えたことを特徴とする棒材供給機。11. A bar feeder for feeding a bar from a rear side of the headstock to a lathe provided with a headstock capable of moving forward and backward, wherein a rear end of the bar in the feed direction is provided. A feed member provided so as to be able to advance and retreat integrally with the bar while holding the headstock, the headstock of the headstock so that the feed member moves in the feed direction of the bar in conjunction with advance and retreat of the headstock. Movement can be transmitted to the feed member, and a first transmission mechanism provided with a first clutch in a transmission path thereof; a motor for driving the feed member; And a second transmission mechanism provided with a second clutch in the transmission path thereof; and the first and second transmission mechanisms after the end of one machining and the headstock re-gripping the bar. Disconnect the second clutch once and then Bar feeder, characterized in that it and a control device connected to the serial first clutch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32376398A JP4098901B2 (en) | 1998-05-15 | 1998-11-13 | Bar feeder |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10-133762 | 1998-05-15 | ||
| JP13376298 | 1998-05-15 | ||
| JP32376398A JP4098901B2 (en) | 1998-05-15 | 1998-11-13 | Bar feeder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000033501A true JP2000033501A (en) | 2000-02-02 |
| JP4098901B2 JP4098901B2 (en) | 2008-06-11 |
Family
ID=26468021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32376398A Expired - Lifetime JP4098901B2 (en) | 1998-05-15 | 1998-11-13 | Bar feeder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4098901B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008023703A (en) * | 2006-06-23 | 2008-02-07 | Gleason Corp | Machine tool |
| JP2008043661A (en) * | 2006-08-21 | 2008-02-28 | Kyoraku Sangyo Kk | Pachinko game machine and its control method |
| JP2015134408A (en) * | 2015-05-01 | 2015-07-27 | 株式会社アルプスツール | Material displacement detection method and material displacement detector |
| JP2016221639A (en) * | 2015-06-01 | 2016-12-28 | 育良精機株式会社 | Bar material supply machine and method for supply of bar material |
| KR101741986B1 (en) * | 2016-06-20 | 2017-05-31 | (주)미주테크 | workpiece supplying apparatus for CNC machine |
-
1998
- 1998-11-13 JP JP32376398A patent/JP4098901B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008023703A (en) * | 2006-06-23 | 2008-02-07 | Gleason Corp | Machine tool |
| JP2008043661A (en) * | 2006-08-21 | 2008-02-28 | Kyoraku Sangyo Kk | Pachinko game machine and its control method |
| JP2015134408A (en) * | 2015-05-01 | 2015-07-27 | 株式会社アルプスツール | Material displacement detection method and material displacement detector |
| JP2016221639A (en) * | 2015-06-01 | 2016-12-28 | 育良精機株式会社 | Bar material supply machine and method for supply of bar material |
| KR101741986B1 (en) * | 2016-06-20 | 2017-05-31 | (주)미주테크 | workpiece supplying apparatus for CNC machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4098901B2 (en) | 2008-06-11 |
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