JPH063508U - Hydraulic chuck device - Google Patents
Hydraulic chuck deviceInfo
- Publication number
- JPH063508U JPH063508U JP4909192U JP4909192U JPH063508U JP H063508 U JPH063508 U JP H063508U JP 4909192 U JP4909192 U JP 4909192U JP 4909192 U JP4909192 U JP 4909192U JP H063508 U JPH063508 U JP H063508U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic cylinder
- hydraulic
- chuck
- spindle
- control valve
- 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.)
- Pending
Links
Abstract
(57)【要約】
【目的】 主軸高速回転時の遠心力によるチャック爪の
把握力低下を防止して、安全性及び加工精度を向上す
る。
【構成】 油圧チャック３のチャック爪４を油圧シリン
ダ５により開閉する。油圧シリンダ５を制御する油圧回
路９に電磁比例制御弁１６及び電磁切換弁１７を設け
る。電磁切換弁１７は油圧シリンダ５の作動方向を切り
換えて、チャック爪４を開放または閉鎖する。電磁比例
制御弁１６は油圧シリンダ５の作動圧を主軸２の回転数
に比例して制御する。主軸２の高速回転時には、電磁比
例制御弁１６が油圧シリンダ５の作動圧を強化し、チャ
ック爪４が安定した把握力でワーク８を確実に保持す
る。
(57) [Summary] [Purpose] To prevent the gripping force of the chuck claw from decreasing due to centrifugal force during high-speed rotation of the spindle, and improve safety and processing accuracy. [Structure] A chuck claw 4 of a hydraulic chuck 3 is opened and closed by a hydraulic cylinder 5. An electromagnetic proportional control valve 16 and an electromagnetic switching valve 17 are provided in a hydraulic circuit 9 that controls the hydraulic cylinder 5. The electromagnetic switching valve 17 switches the operating direction of the hydraulic cylinder 5 to open or close the chuck claw 4. The electromagnetic proportional control valve 16 controls the working pressure of the hydraulic cylinder 5 in proportion to the rotation speed of the main shaft 2. When the spindle 2 rotates at a high speed, the electromagnetic proportional control valve 16 strengthens the operating pressure of the hydraulic cylinder 5, and the chuck claw 4 reliably holds the work 8 with a stable grasping force.
Description
【０００１】[0001]
この考案は、チャック爪を油圧シリンダで開閉する油圧チャック装置に係り、 特に、遠心力によるチャック爪の把握力低下を防止する技術に関するものである 。 The present invention relates to a hydraulic chuck device that opens and closes a chuck claw with a hydraulic cylinder, and more particularly to a technique for preventing a decrease in gripping force of the chuck claw due to centrifugal force.
【０００２】[0002]
ＮＣ旋盤等に装備される従来の油圧チャック装置においては、図４に示すよう に油圧シリンダ５の作動圧を減圧弁１８で調整することによってチャック爪４の 把握力を制御している。ところが、これによると、チャック爪４の把握力が主軸 回転数と無関係に制御されるため、主軸２の高速回転時に遠心力によってチャッ ク爪４の把握力が低下し、ワーク８が飛び出す危険性があるばかりでなく、加工 精度に悪影響を及ぼすという問題点があった。 In the conventional hydraulic chuck device mounted on an NC lathe or the like, the grasping force of the chuck claw 4 is controlled by adjusting the operating pressure of the hydraulic cylinder 5 with the pressure reducing valve 18, as shown in FIG. However, according to this, since the gripping force of the chuck claw 4 is controlled independently of the spindle rotational speed, the gripping force of the chuck claw 4 is reduced by centrifugal force when the spindle 2 rotates at a high speed, and there is a risk of the work 8 popping out. Not only that, but there was a problem that the processing accuracy was adversely affected.
【０００３】[0003]
そこで、この考案の課題は、主軸高速回転時の遠心力によるチャック爪の把握 力低下を防止して、安全性及び加工精度を向上できる油圧チャック装置を提供す ることにある。 Therefore, an object of this invention is to provide a hydraulic chuck device capable of improving safety and processing accuracy by preventing a decrease in gripping force of a chuck claw due to centrifugal force during high-speed rotation of a spindle.
【０００４】[0004]
上記の課題を解決するために、この考案の油圧チャック装置は、チャック爪を 開閉する油圧シリンダと、油圧シリンダを制御する油圧回路とを備え、油圧回路 に油圧シリンダの作動圧を主軸回転数に比例して制御する電磁比例制御弁を設け て構成される。 In order to solve the above problems, the hydraulic chuck device of the present invention includes a hydraulic cylinder that opens and closes a chuck claw, and a hydraulic circuit that controls the hydraulic cylinder, and the hydraulic circuit sets the operating pressure of the hydraulic cylinder to the spindle rotational speed. It is configured with an electromagnetic proportional control valve for proportional control.
【０００５】[0005]
この考案の油圧チャック装置によれば、主軸が高速回転されたときに、電磁比 例制御弁が主軸回転数に比例して油圧シリンダの作動圧を強化し、これによって 、チャック爪が安定した把握力でワークを確実に保持する。 According to the hydraulic chuck device of the present invention, when the main spindle is rotated at a high speed, the electromagnetic ratio control valve strengthens the working pressure of the hydraulic cylinder in proportion to the main spindle rotation speed. Holds the work securely with force.
【０００６】[0006]
以下、この考案を具体化した一実施例を図面に基づいて説明する。図１はＮＣ 旋盤の油圧チャック装置を示すもので、図において、１は主軸台、２は主軸、３ は主軸２に取り付けられた油圧チャック、４は油圧チャック３に開閉可能に装着 されたチャック爪、５はチャック爪４を開閉駆動する油圧シリンダである。６， ７は主軸２を制動する高圧ブレーキ及び低圧ブレーキ、８はワークである。 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a hydraulic chuck device for an NC lathe. In the figure, 1 is a headstock, 2 is a spindle, 3 is a hydraulic chuck attached to the spindle 2, and 4 is a chuck that is openably and closably attached to the hydraulic chuck 3. The claws 5 are hydraulic cylinders that open and close the chuck claws 4. Reference numerals 6 and 7 are a high pressure brake and a low pressure brake for braking the main shaft 2, and 8 is a work.
【０００７】 ９は油圧シリンダ５を制御する油圧回路の全体を示し、１０はタンク、１１は 油圧ポンプ、１２は電動機、１３はラインフィルター、１４，１５は圧力計、１ ６は電磁比例制御弁、１７は電磁切換弁である。電磁切換弁１７は油圧シリンダ ５の作動方向を切り換えてチャック爪４を開放または閉鎖し、電磁比例制御弁１ ６は油圧シリンダ５の作動圧を主軸回転数に比例して制御するように構成されて いる。Reference numeral 9 denotes an entire hydraulic circuit for controlling the hydraulic cylinder 5, 10 is a tank, 11 is a hydraulic pump, 12 is an electric motor, 13 is a line filter, 14 and 15 are pressure gauges, and 16 is an electromagnetic proportional control valve. , 17 are electromagnetic switching valves. The electromagnetic switching valve 17 switches the operating direction of the hydraulic cylinder 5 to open or close the chuck claw 4, and the electromagnetic proportional control valve 16 is configured to control the operating pressure of the hydraulic cylinder 5 in proportion to the spindle rotational speed. ing.
【０００８】 図２は油圧チャツク装置の電気制御回路を示し、１８は回転指令回路であり、 ＮＣプログラムに基づいた回転指令をモータ駆動回路１９を介して主軸駆動モー タ２０に出力する。２１は主軸２の回転数を検出する回転数検出器、２２は主軸 回転数に基づき電磁比例制御弁１６の励磁電流値を演算する電流値演算回路、２ ３は電磁比例制御弁１６を駆動するバルブ駆動回路である。FIG. 2 shows an electric control circuit of the hydraulic chuck device. Reference numeral 18 denotes a rotation command circuit, which outputs a rotation command based on an NC program to a spindle drive motor 20 via a motor drive circuit 19. Reference numeral 21 is a rotation speed detector for detecting the rotation speed of the main spindle 2, 22 is a current value calculation circuit for calculating the exciting current value of the electromagnetic proportional control valve 16 based on the main spindle rotation speed, and 23 is for driving the electromagnetic proportional control valve 16. It is a valve drive circuit.
【０００９】 次に、上記のように構成した油圧チャック装置の作用を図３に示すフローチャ ートに従って説明する。回転指令回路１８が回転指令を出力すると（ステップＳ １）、その指令値に基づく回転数で主軸２及び油圧チャック３が回転され（ステ ップＳ２）、チャック爪４に把握されたワーク８が旋削される。主軸２の回転数 は回転数検出器２１によって検出され（ステップＳ３）、その主軸回転数に基づ き電流値演算回路２２が電磁比例制御弁１６の励磁電流値を演算する（ステップ Ｓ４）。この演算値によりバルブ駆動回路２３を介して電磁比例制御弁１６のソ レノイドが駆動され、電磁比例制御弁１６が油圧シリンダ５の作動圧を主軸回転 数に比例して制御する（ステップＳ５）。Next, the operation of the hydraulic chuck device configured as described above will be described according to the flow chart shown in FIG. When the rotation command circuit 18 outputs a rotation command (step S1), the spindle 2 and the hydraulic chuck 3 are rotated at the number of rotations based on the command value (step S2), and the workpiece 8 grasped by the chuck claw 4 is rotated. To be turned. The rotation speed of the spindle 2 is detected by the rotation speed detector 21 (step S3), and the current value calculation circuit 22 calculates the exciting current value of the electromagnetic proportional control valve 16 based on the rotation speed of the spindle (step S4). This calculated value drives the solenoid of the solenoid proportional control valve 16 via the valve drive circuit 23, and the solenoid proportional control valve 16 controls the operating pressure of the hydraulic cylinder 5 in proportion to the spindle rotational speed (step S5).
【００１０】 これにより、主軸２の高速回転時には、電磁比例制御弁１６が油圧シリンダ５ の作動圧を強化し、チャック爪４が安定した把握力でワーク８を確実に保持する 。したがって、ワーク８が遠心力によって飛び出すおそれがなく、安全に高速旋 削できるとともに、ワークを高い真円度で精度よく加工することが可能になる。 また、主軸２の低速回転時には電磁比例制御弁１６が油圧シリンダ５の作動圧を 弱め、チャック爪４がワーク８を最適な把握力で保持するので、ワーク８に爪跡 が残るおそれはない。As a result, when the spindle 2 rotates at a high speed, the electromagnetic proportional control valve 16 strengthens the operating pressure of the hydraulic cylinder 5, and the chuck claw 4 reliably holds the work 8 with a stable grasping force. Therefore, there is no risk of the work 8 popping out due to centrifugal force, and high-speed turning can be performed safely, and the work can be accurately machined with high roundness. Further, when the main shaft 2 rotates at a low speed, the electromagnetic proportional control valve 16 weakens the operating pressure of the hydraulic cylinder 5 and the chuck claw 4 holds the work 8 with an optimum grasping force, so that there is no possibility that a claw mark will remain on the work 8.
【００１１】 なお、この考案は上記実施例に限定されるものではなく、本考案の趣旨を逸脱 しない範囲で各部の形状並びに構成を適宜に変更して具体化することも可能であ る。The present invention is not limited to the above-described embodiments, and the shapes and configurations of the respective parts can be appropriately modified and embodied without departing from the spirit of the present invention.
【００１２】[0012]
以上に詳述したように、この考案によれば、油圧シリンダの作動圧を主軸回転 数に比例して制御する電磁比例制御弁を設けたので、主軸高速回転時の遠心力に よるチャック爪の把握力低下を防止して、安全性及び加工精度を向上できるとい う優れた効果を奏する。 As described above in detail, according to the present invention, since the electromagnetic proportional control valve for controlling the working pressure of the hydraulic cylinder in proportion to the spindle rotation speed is provided, the chuck claw caused by the centrifugal force during the high-speed rotation of the spindle is It has the excellent effect of preventing a decrease in grasping power and improving safety and processing accuracy.
【図１】本考案の一実施例を示す油圧チャック装置の概
略図である。FIG. 1 is a schematic view of a hydraulic chuck device according to an embodiment of the present invention.
【図２】図１の装置の電気制御回路を示すブロック図で
ある。2 is a block diagram showing an electrical control circuit of the device of FIG. 1. FIG.
【図３】図１の装置の作用を説明するフローチャートで
ある。3 is a flow chart illustrating the operation of the apparatus of FIG.
【図４】従来例に示す油圧チャック装置の概略図であ
る。FIG. 4 is a schematic view of a hydraulic chuck device shown in a conventional example.
１・・主軸台、２・・主軸、３・・油圧チャック、４・
・チャック爪、５・・油圧シリンダ、６・・高圧ブレー
キ、７・・低圧ブレーキ、８・・ワーク、９・・油圧回
路、１０・・タンク、１１・・ポンプ、１２・・電動
機、１３・・ラインフィルター、１４，１５・・圧力
計、１６・・電磁比例制御弁、１７・・電磁切換弁、１
８・・減圧弁。1- ・ Headstock, 2 ・ ・ Spindle, 3 ・ ・ Hydraulic chuck, 4 ・
・ Chuck claws, 5 ・ ・ Hydraulic cylinders, 6 ・ ・ High pressure brakes, 7 ・ ・ Low pressure brakes, 8 ・ ・ Workpieces, 9 ・ ・ Hydraulic circuits, 10 ・ ・ Tanks, 11 ・ ・ Pumps, 12 ・ ・ Electric motors, 13 ・・ Line filter, 14, 15 ・ ・ Pressure gauge, 16 ・ ・ Electromagnetic proportional control valve, 17 ・ ・ Electromagnetic switching valve, 1
8 ... Reducing valve.
Claims (1)
油圧シリンダを制御する油圧回路とを備え、前記油圧回
路に油圧シリンダの作動圧を主軸回転数に比例して制御
する電磁比例制御弁を設けてなることを特徴とする油圧
チャック装置。1. A hydraulic cylinder for opening and closing a chuck claw,
A hydraulic chuck device for controlling a hydraulic cylinder, wherein the hydraulic circuit is provided with an electromagnetic proportional control valve for controlling the working pressure of the hydraulic cylinder in proportion to the rotational speed of the spindle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4909192U JPH063508U (en) | 1992-06-19 | 1992-06-19 | Hydraulic chuck device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4909192U JPH063508U (en) | 1992-06-19 | 1992-06-19 | Hydraulic chuck device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH063508U true JPH063508U (en) | 1994-01-18 |
Family
ID=12821434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4909192U Pending JPH063508U (en) | 1992-06-19 | 1992-06-19 | Hydraulic chuck device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH063508U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011502806A (en) * | 2007-11-13 | 2011-01-27 | ハイダック フルイドテヒニク ゲゼルシャフト ミット ベシュレンクテル ハフツング | Valve device |
| WO2022202601A1 (en) * | 2021-03-23 | 2022-09-29 | Dmg森精機株式会社 | Machine tool, machine tool control method, and machine tool control program |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6015924A (en) * | 1983-07-07 | 1985-01-26 | Canon Inc | Positioning device |
-
1992
- 1992-06-19 JP JP4909192U patent/JPH063508U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6015924A (en) * | 1983-07-07 | 1985-01-26 | Canon Inc | Positioning device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011502806A (en) * | 2007-11-13 | 2011-01-27 | ハイダック フルイドテヒニク ゲゼルシャフト ミット ベシュレンクテル ハフツング | Valve device |
| WO2022202601A1 (en) * | 2021-03-23 | 2022-09-29 | Dmg森精機株式会社 | Machine tool, machine tool control method, and machine tool control program |
| JP2022147446A (en) * | 2021-03-23 | 2022-10-06 | Dmg森精機株式会社 | Machine tool, and control method and control program therefor |
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