JPH01222840A - Main spindle of machine tool - Google Patents
Main spindle of machine toolInfo
- Publication number
- JPH01222840A JPH01222840A JP4759388A JP4759388A JPH01222840A JP H01222840 A JPH01222840 A JP H01222840A JP 4759388 A JP4759388 A JP 4759388A JP 4759388 A JP4759388 A JP 4759388A JP H01222840 A JPH01222840 A JP H01222840A
- Authority
- JP
- Japan
- Prior art keywords
- main spindle
- cylindrical body
- main shaft
- shaft
- disk
- 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
- 239000012530 fluid Substances 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0032—Arrangements for preventing or isolating vibrations in parts of the machine
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- Turning (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分舒〉
本発明は工作機械の主軸、特に、回転方向の振動を抑え
ろためにイナーシャダンパを有するモータ一体型の主軸
に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application> The present invention relates to a main shaft of a machine tool, and particularly to a motor-integrated main shaft having an inertia damper for suppressing vibration in the rotational direction.
〈従来の技術〉
工作機械の主軸は、ガタが少なく、剛性が高く、回転方
向の振動が少ない必要がある。<Prior Art> The main shaft of a machine tool must have little backlash, high rigidity, and little vibration in the direction of rotation.
特に、自動車の低騒音化及びドライビングフィーリング
の向上のためにミッシ璽ンギアの高精度化に対する要求
が年々高まり、そのため、この歯車を熱処理した後に効
率良く仕上げる焼入歯車仕上機（八−ドギヤフィニッシ
ャ−）の開発が進められており、ガタが少なく、剛性が
高（、且つ回転方向の振動が少ない主軸が強く要求され
るようになった。In particular, the demand for higher precision gears is increasing year by year in order to reduce noise and improve the driving feeling of automobiles. As progress is being made in the development of spindles (finishers), there is a strong demand for spindles with less play, high rigidity (and less vibration in the rotational direction).
例えば、焼入歯車仕上機として、歯車状のＣＢＮ砥石を
用い、この砥石をワークと軸交差角を持たせて噛合せる
方式のものが、段付ギヤでも加工可能であるなど、対象
ワークの制限が少なく且つ７レキシビリテイに富んでい
るので有用であるが、この場合、カッタ軸とワーク軸は
各々１０００〜４０００ｒｐ■以上で同期回転させる必
要がある。For example, a hardened gear finishing machine that uses a gear-shaped CBN grindstone and meshes the grindstone with the workpiece at an axis intersection angle can also process stepped gears, which limits the target workpiece. This method is useful because it has a small amount of torque and high flexibility, but in this case, the cutter shaft and work shaft must each be rotated synchronously at 1,000 to 4,000 rpm or more.
しかし、このような高速回転での同期を実現するために
は制御装置のゲインを、通常は数１０ｓｓｅ’であるの
に対し、１０００〜１００００ｓｅｃ−’にまで上げる
ことが必要であり、そのためには駆動系のガタを追放し
、且つ剛性を向上させると共に、軸の回転方向の振動を
極力抑える必要がある。However, in order to achieve synchronization at such high speeds, it is necessary to increase the gain of the control device from the usual tens of sse' to 1,000 to 10,000 sec-'. It is necessary to eliminate play in the drive system, improve rigidity, and suppress vibration in the rotational direction of the shaft as much as possible.
従来はこのような要求を満たす主軸はなかった。Until now, there was no spindle that met these requirements.
〈発明が解決しようとする課題〉
本発明は上述した従来技術に鑑み、ガタが少なく、剛性
が高く、且つ回転方向の振動が少ない工作機械の主軸を
提供することを目的とする。<Problems to be Solved by the Invention> In view of the above-mentioned prior art, an object of the present invention is to provide a main shaft for a machine tool that has less play, high rigidity, and less vibration in the rotational direction.
く課題を解決するための手段〉
本発明による工作機械の主軸はイナーシャダンパ付のビ
ルトインモータであり、主軸と駆動用モータが一体化さ
れ、主軸の一部に固定された円形部材と、主軸に回転可
能に取付けられ、円形部材を挾む粘性流体を封入した隙
間を有する筒体とからなるイナーシャダンパを備えたこ
とを特徴とする。Means for Solving the Problems> The main shaft of the machine tool according to the present invention is a built-in motor with an inertia damper, and the main shaft and the drive motor are integrated, and a circular member fixed to a part of the main shaft and a The present invention is characterized in that it includes an inertia damper that is rotatably mounted and includes a cylindrical body having a gap in which a viscous fluid is enclosed between circular members.
く作 用〉
上記構成におて、主軸はモータと一体化されたいわゆる
ビルトインモータであり、この構造により、駆動系のガ
タがなくな抄、且つ剛性が向上する。Function> In the above configuration, the main shaft is a so-called built-in motor that is integrated with the motor, and this structure eliminates backlash in the drive system and improves the mechanical strength and rigidity.
また、主軸の回転につれて円形部材、粘性流体を介して
筒体が回転するが、主軸に回転変動があると粘性によっ
て筒体が遅れて変動しようとするため、イナーシャダン
パとして働き、回転方向の振動を抑える。In addition, as the main shaft rotates, the cylinder rotates through the circular member and viscous fluid, but if there is a rotational fluctuation in the main shaft, the cylinder tries to change with a delay due to viscosity, so it acts as an inertia damper, causing vibrations in the direction of rotation. suppress.
く実 施 例〉 息下、図面を参照して本発明の一実施例を説明する。Practical example An embodiment of the present invention will now be described with reference to the drawings.
主軸１は左右のベアリング２ａ、２ｂを介してケース３
に支持されており、モータと一体化されている。即ち、
主軸１に駆動用モータのロータ４が固定され、ケース３
の内周に同モータのステータ５が固定されている。即ち
、ビルトインモータであり、主軸１はロータ４とステー
タ５によりガタなく回転駆動され、また剛性が高（なっ
ている。The main shaft 1 is connected to the case 3 via left and right bearings 2a and 2b.
It is supported by the motor and is integrated with the motor. That is,
A rotor 4 of a drive motor is fixed to the main shaft 1, and a case 3
The stator 5 of the motor is fixed to the inner periphery of the motor. That is, it is a built-in motor, and the main shaft 1 is rotationally driven by the rotor 4 and stator 5 without play, and has high rigidity.
一方、主軸１の一部には円板６がキー等を用いて固定さ
れ、また円板６を囲んで筒体７が左右のベアリング８，
９により主軸１に回転可能に取付けられている。On the other hand, a disc 6 is fixed to a part of the main shaft 1 using a key or the like, and a cylindrical body 7 surrounds the disc 6 and left and right bearings 8,
It is rotatably attached to the main shaft 1 by 9.
筒体７は円板６を隙間１０をあけて挾む構造であり、隙
間１０にシリコンオイル等の粘性流体１１を封入しであ
る。円板６を挾むため、筒体７は左右、内外に分割構造
としである。The cylindrical body 7 has a structure in which the disc 6 is sandwiched between the discs 6 with a gap 10 between them, and the gap 10 is filled with a viscous fluid 11 such as silicone oil. In order to sandwich the disk 6, the cylindrical body 7 has a structure divided into left and right, inside and outside.
動作としては、モータに通電すると主軸１が回転し、円
板６も同時に回転する。このとき、筒体７は円板６との
間の隙間１０に封入した粘性流体１１のために、円板６
につれて、ひいては主軸１につれて回転する。In operation, when the motor is energized, the main shaft 1 rotates and the disc 6 also rotates at the same time. At this time, due to the viscous fluid 11 sealed in the gap 10 between the cylindrical body 7 and the disc 6,
As a result, it rotates as the main shaft 1 rotates.
今、負荷変動等により主軸１に回転変動が生じると、粘
性のために筒体７は遅れて変動しようとし、このイナー
シャダンパ効果によって主軸１の振動が抑えられる。Now, when a rotational fluctuation occurs in the main shaft 1 due to a load change or the like, the cylinder 7 tends to change with a delay due to viscosity, and the vibration of the main shaft 1 is suppressed by this inertia damper effect.
主軸１は焼入歯車仕上機等、容置の工作機械のカッタ軸
、ワーク軸などとして使用することができ、例えば、図
示の如く、ナツト１２及びカッタ押え１３により、ＣＢ
Ｎ砥石などのカッタ１４が装着される。例えば、主軸１
を焼入歯車仕上機のカッタ軸とワーク軸にそれぞれ用い
、カッタとして歯車状のＣＢＮ砥石を用いて砥石とワー
クとを軸交差角を持たせて噛み合せ、各軸を数１０００
ｒｐ■で回転させ、制御装置のゲインを数１０００にし
て両軸の回転の同期をとる。The main shaft 1 can be used as a cutter shaft or work shaft of a machine tool such as a hardened gear finishing machine. For example, as shown in the figure, a nut 12 and a cutter holder 13
A cutter 14 such as an N grindstone is attached. For example, spindle 1
was used for the cutter shaft and workpiece shaft of a hardened gear finishing machine, and a gear-shaped CBN grindstone was used as the cutter, and the grindstone and workpiece were engaged with the shaft intersection angle, and each shaft was
The shaft is rotated at rp■ and the gain of the control device is set to several thousand to synchronize the rotation of both axes.
〈発明の効果〉
本発明によれば、主軸の基本構造がビルトインモータタ
イプであるため、駆動系のガタがなくなり、また剛性が
向上する。更に、イナーシャダンパを備えるので、主軸
の回転方向の振動が大幅に減る。<Effects of the Invention> According to the present invention, since the basic structure of the main shaft is a built-in motor type, play in the drive system is eliminated and rigidity is improved. Furthermore, since an inertia damper is provided, vibrations in the rotational direction of the main shaft are significantly reduced.
従って、各種工作機械の加工精度を向上させろことがで
きろ。特に、ガタがなく、剛性が高く、振動がないので
、同期回転が必要なカッタ軸とワーク軸にそれぞれ用い
る場合は、制御装置のゲインを通常の数１０から数１０
００まで上げることができ、超高速同期運転が可能とな
る。Therefore, it is possible to improve the machining accuracy of various machine tools. In particular, since there is no backlash, high rigidity, and no vibration, when using the cutter axis and workpiece axis, which require synchronous rotation, the gain of the control device should be increased from the usual number 10 to the number 10.
It can be raised up to 00, making ultra-high-speed synchronous operation possible.
図面は本発明の一実施例を示す断面図である。
図面中、
１は主軸、
２ ａｐ ２ ｂ、８，９は’＜７リング、３はケース
、
４はモータのロータ、
５はステータ、
６は円板、
７は筒体、
１０は隙間、
１１は粘性流体である。The drawing is a sectional view showing an embodiment of the present invention. In the drawings, 1 is the main shaft, 2 ap 2 b, 8, 9 are '<7 rings, 3 is the case, 4 is the rotor of the motor, 5 is the stator, 6 is the disk, 7 is the cylinder, 10 is the gap, 11 is a viscous fluid.
Claims (1)
された円形部材と、主軸に回転可能に取付けられ、円形
部材を挾む粘性流体を封入した隙間を有する筒体とから
なるイナーシャダンパを備えたことを特徴とする工作機
械の主軸。The main shaft and the drive motor are integrated, and the inertia consists of a circular member fixed to a part of the main shaft, and a cylindrical body rotatably attached to the main shaft and having a gap filled with viscous fluid that sandwiches the circular member. The main shaft of a machine tool is characterized by being equipped with a damper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63047593A JP2521320B2 (en) | 1988-03-02 | 1988-03-02 | Gear finishing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63047593A JP2521320B2 (en) | 1988-03-02 | 1988-03-02 | Gear finishing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01222840A true JPH01222840A (en) | 1989-09-06 |
| JP2521320B2 JP2521320B2 (en) | 1996-08-07 |
Family
ID=12779546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63047593A Expired - Lifetime JP2521320B2 (en) | 1988-03-02 | 1988-03-02 | Gear finishing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2521320B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05277882A (en) * | 1992-03-31 | 1993-10-26 | Makino Milling Mach Co Ltd | Damping mechanism for rotating shaft device |
| US6761517B2 (en) * | 2001-04-25 | 2004-07-13 | Tornos Sa | Motorized spindle |
| CN102294617A (en) * | 2011-08-04 | 2011-12-28 | 中国科学院过程工程研究所 | Particle damped vibration attenuation machine tool |
| CN106041132A (en) * | 2016-08-23 | 2016-10-26 | 蚌埠精科机床制造有限公司 | Vibration-isolating machine tool spindle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4733489U (en) * | 1971-05-12 | 1972-12-14 | ||
| JPS502278A (en) * | 1973-05-14 | 1975-01-10 | ||
| JPS63717U (en) * | 1986-06-20 | 1988-01-06 | ||
| JPS6321547U (en) * | 1986-07-24 | 1988-02-12 |
-
1988
- 1988-03-02 JP JP63047593A patent/JP2521320B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4733489U (en) * | 1971-05-12 | 1972-12-14 | ||
| JPS502278A (en) * | 1973-05-14 | 1975-01-10 | ||
| JPS63717U (en) * | 1986-06-20 | 1988-01-06 | ||
| JPS6321547U (en) * | 1986-07-24 | 1988-02-12 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05277882A (en) * | 1992-03-31 | 1993-10-26 | Makino Milling Mach Co Ltd | Damping mechanism for rotating shaft device |
| US6761517B2 (en) * | 2001-04-25 | 2004-07-13 | Tornos Sa | Motorized spindle |
| CN102294617A (en) * | 2011-08-04 | 2011-12-28 | 中国科学院过程工程研究所 | Particle damped vibration attenuation machine tool |
| CN106041132A (en) * | 2016-08-23 | 2016-10-26 | 蚌埠精科机床制造有限公司 | Vibration-isolating machine tool spindle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2521320B2 (en) | 1996-08-07 |
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