CN203061895U - Flutter-free electric spindle - Google Patents
Flutter-free electric spindle Download PDFInfo
- Publication number
- CN203061895U CN203061895U CN 201220739621 CN201220739621U CN203061895U CN 203061895 U CN203061895 U CN 203061895U CN 201220739621 CN201220739621 CN 201220739621 CN 201220739621 U CN201220739621 U CN 201220739621U CN 203061895 U CN203061895 U CN 203061895U
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- CN
- China
- Prior art keywords
- main shaft
- magnetic bearing
- flutter
- servomotor
- rotor
- 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.)
- Expired - Fee Related
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- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The utility model discloses a flutter-free electric spindle. The flutter-free electric spindle comprises a servo motor and a spindle body, the spindle body and a rotor of the servo motor are integrated, the rotor of the servo motor is arranged in the middle segment of the spindle body, the spindle body is supported and positioned on a stator of the servo motor through a rolling bearing and a magnetic bearing, and the magnetic bearing is provided with a servo control system capable of controlling radial suspension force of the magnetic bearing. Positioning accuracy and rigidity of the spindle body can be adjusted by controlling the suspension force of the magnetic bearing, cutting flutter generated during high-speed cutting is eliminated, and processing efficiency and processing quality of the electric spindle are improved, so that cutting quantity within a unit time is increased, and requirements of development and practical application of the high-speed cutting technology are met.
Description
Technical field
The utility model relates to a kind of rotating machinery, relates in particular to a kind of no flutter electricity main shaft.
Background technology
The electricity main shaft is the zero drive mechanism that main shaft and motor rotor are combined as a whole, has compact conformation, in light weight, inertia is little, noise is low and respond advantages such as fast, and rotating speed height, power is big, can simplify Machine Tool design, be easy to realize the main shaft location, the electricity main shaft is to be used on the grinding machine the earliest, developed into machining center afterwards, along with machine tool technology, the development of High-speed Machining Technology and the needs of practical application, people have also proposed more and more higher requirement to the performance of electrical spindle for machine tool, the electricity main shaft is to high-speed high-power, high accuracy, high rigidity, accurate pointing and ultrahigh speed direction develop, just must guarantee its dynamic stability, particularly when heavily loaded high-efficient cutting, the boundary of processing stability just is expressed as whether flutter takes place, the electric main shaft of prior art, its main shaft is positioned motor stator by roller bearings, be subjected to the influence of rolling bearing rigidity and fit clearance, in high-efficient cutting, main shaft is subjected to the rotating speed of self-excited vibration restriction to be generally 20000 ~ 30000r/min, and crudy and processing economy can't satisfy the needs of development and the practical application of High-speed Machining Technology.
Therefore, need the electric main axle structure of prior art is improved, eliminate the cutting-vibration that in high-speed machining process, produces, improve working power and the quality of electric main shaft, and then improve cutting output in the unit interval, with the development of satisfying High-speed Machining Technology and the needs of practical application.
The utility model content
In view of this, the purpose of this utility model provides a kind of no flutter electricity main shaft, can eliminate the cutting-vibration that in high-speed machining process, produces, improve working power and the quality of electric main shaft, and then improve interior cutting output of unit interval, satisfy the needs of development and the practical application of High-speed Machining Technology.
No flutter electricity main shaft of the present utility model, comprise servomotor and main shaft, the rotor of described main shaft and servomotor becomes one, the rotor of servomotor is arranged at the main shaft stage casing and main shaft supports the support that is positioned servomotor by rolling bearing and magnetic bearing, and described magnetic bearing is provided with the servo-control system that can control its radial suspension force.
Further, described magnetic bearing arranges with respect to the working end that rolling bearing is bordering on main shaft;
Further, described magnetic bearing is the alternating current-direct current three freedom degree mixed magnetic bearing, comprises bearing rotor, radially control coil, radial stator, permanent magnet, axially control coil and axial stator;
Further, described servo-control system comprises radial displacement transducer, shaft position sensor, dsp controller, three-phase power inverter and dc switch power amplifier, wherein radial displacement transducer and shaft position sensor are used for radial displacement and the axial displacement of induction main shaft respectively and produce the signal of telecommunication being transferred to described dsp controller accordingly, and dsp controller is handled the axial control coil that back output corresponding control signal is transferred to the radially control coil of three-phase power inverter control three freedom degree mixed magnetic bearing or is transferred to dc switch power amplifier control three freedom degree mixed magnetic bearing to the described signal of telecommunication;
Further, described main shaft becomes one by the rotor of transition wheel and servomotor, the interior circle of described transition wheel and main shaft secure fit, the rotor secure fit of cylindrical and servomotor;
Further, the support inner periphery of servomotor arranges stator, and the circumferencial direction at servomotor between support and the stator arranges cooling water jecket, and cooling water inlet and the coolant outlet of cooling water jecket are arranged on the support.
The beneficial effects of the utility model are: no flutter electricity main shaft of the present utility model is provided with the adjustable magnetic bearing of suspending power between main shaft and servo motor stator, the big I of suspending power by the control magnetic bearing is regulated positioning accuracy and the rigidity of main shaft, the cutting-vibration that elimination produces in high-speed machining process, improve working power and the quality of electric main shaft, and then improve interior cutting output of unit interval, satisfy the needs of development and the practical application of High-speed Machining Technology.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described:
Fig. 1 is structural representation of the present utility model.
The specific embodiment
Fig. 1 is structural representation of the present utility model, as shown in the figure: the no flutter electricity main shaft of present embodiment, comprise servomotor and main shaft 1, described main shaft 1 becomes one with the rotor 2 of servomotor, the rotor 2 of servomotor is arranged at main shaft 1 stage casing and main shaft 1 supports the support 12 that is positioned servomotor by rolling bearing 3 and magnetic bearing 4, described magnetic bearing 4 is provided with the servo-control system that can control its radial suspension force, the big I of suspending power by the control magnetic bearing is regulated positioning accuracy and the rigidity of main shaft 1, the cutting-vibration that elimination produces in high-speed machining process, improve working power and the quality of electric main shaft, and then the cutting output in the raising unit interval, satisfy the needs of development and the practical application of High-speed Machining Technology, magnetic bearing 4 has the rotating speed height in addition, low in energy consumption, there is not friction, there are not wearing and tearing, need not lubricated and advantages such as sealing and life-span length.
In the present embodiment, described magnetic bearing 4 arranges with respect to the working end that rolling bearing 3 is bordering on main shaft 1, makes the flutter that is produced by main shaft 1 working end be easy to be absorbed elimination by magnetic bearing 4, reduces system power dissipation.
In the present embodiment, described magnetic bearing 4 is the alternating current-direct current three freedom degree mixed magnetic bearing, comprise bearing rotor 4a, radially control coil 4b, radial stator 4c, permanent magnet 4d, axially control coil 4e and axial stator 4f, can carry out radial and axial location to main shaft 1, main shaft 1 good rigidly, compact conformation.
In the present embodiment, described servo-control system comprises radial displacement transducer 6, shaft position sensor 7, dsp controller 8, three-phase power inverter 9 and dc switch power amplifier 10, wherein radial displacement transducer 6 and shaft position sensor 7 are corresponding respectively is used for radial displacement and the axial displacement of induction main shaft 1 and produces the signal of telecommunication being transferred to described dsp controller 8,8 pairs of described signals of telecommunication of dsp controller are handled the axial control coil 4e that back output corresponding control signal is transferred to the radially control coil 4b of three-phase power inverter 9 control three freedom degree mixed magnetic bearings or is transferred to dc switch power amplifier 10 control three freedom degree mixed magnetic bearings, formation is from the weakening control system, the automaticity height, adopt three-phase power inverter 9 can reduce system power amplifying circuit volume, reduce system cost, reduce the power amplification circuit power consumption, improve system works efficient.
In the present embodiment, described main shaft 1 becomes one by the rotor 2 of transition wheel 11 with servomotor, the interior circle of described transition wheel 11 and main shaft 1 secure fit, rotor 2 secure fit of cylindrical and servomotor, by being set, transition wheel 11 make main shaft 1 directly not contact cooperation with the rotor 2 of servomotor, can effectively prevent from damaging because of main shaft 1 flutter the interior round structure of the rotor 2 of servomotor, reduce maintenance cost.
In the present embodiment, support 12 inner peripherys of servomotor arrange stator 5, circumferencial direction at servomotor between support 12 and the stator 5 arranges cooling water jecket 13, the cooling water inlet 13a of cooling water jecket 13 and coolant outlet 13b are arranged on the support 12, can reduce the servomotor operating temperature by injecting recirculated cooling water to cooling water jecket 13, avoid each parts under the condition of high temperature, to deform and influence quality of fit, be beneficial to the stability of a system that improves electric main shaft.
Explanation is at last, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (6)
1. no flutter electricity main shaft, comprise servomotor and main shaft (1), it is characterized in that: described main shaft (1) becomes one with the rotor (2) of servomotor, the rotor of servomotor (2) is arranged at main shaft (1) stage casing and main shaft (1) supports the support (12) that is positioned servomotor by rolling bearing (3) and magnetic bearing (4), and described magnetic bearing (4) is provided with the servo-control system that can control its radial suspension force.
2. no flutter electricity main shaft according to claim 1, it is characterized in that: described magnetic bearing (4) arranges with respect to the working end that rolling bearing (3) is bordering on main shaft (1).
3. no flutter electricity main shaft according to claim 2, it is characterized in that: described magnetic bearing (4) is the alternating current-direct current three freedom degree mixed magnetic bearing, comprises bearing rotor (4a), radially control coil (4b), radial stator (4c), permanent magnet (4d), axially control coil (4e) and axial stator (4f).
4. no flutter electricity main shaft according to claim 3, it is characterized in that: described servo-control system comprises radial displacement transducer (6), shaft position sensor (7), dsp controller (8), three-phase power inverter (9) and dc switch power amplifier (10), wherein radial displacement transducer (6) and shaft position sensor (7) are corresponding respectively is used for radial displacement and the axial displacement of induction main shaft (1) and produces the signal of telecommunication being transferred to described dsp controller (8), and dsp controller (8) is handled the axial control coil (4e) that back output corresponding control signal is transferred to the radially control coil (4b) of three-phase power inverter (9) control three freedom degree mixed magnetic bearing or is transferred to dc switch power amplifier (10) control three freedom degree mixed magnetic bearing to the described signal of telecommunication.
5. no flutter electricity main shaft according to claim 4, it is characterized in that: described main shaft (1) becomes one by the rotor (2) of transition wheel (11) with servomotor, the interior circle of described transition wheel (11) and main shaft (1) secure fit, the rotor of cylindrical and servomotor (2) secure fit.
6. no flutter electricity main shaft according to claim 5, it is characterized in that: the support of servomotor (5) inner periphery arranges stator (5), circumferencial direction at servomotor between support (12) and the stator (5) arranges cooling water jecket (13), and cooling water inlet (13a) and the coolant outlet (13b) of cooling water jecket (13) are arranged on the support (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220739621 CN203061895U (en) | 2012-12-28 | 2012-12-28 | Flutter-free electric spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220739621 CN203061895U (en) | 2012-12-28 | 2012-12-28 | Flutter-free electric spindle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203061895U true CN203061895U (en) | 2013-07-17 |
Family
ID=48760721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220739621 Expired - Fee Related CN203061895U (en) | 2012-12-28 | 2012-12-28 | Flutter-free electric spindle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203061895U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019209411A (en) * | 2018-06-01 | 2019-12-12 | 国立大学法人 鹿児島大学 | Spindle device |
-
2012
- 2012-12-28 CN CN 201220739621 patent/CN203061895U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019209411A (en) * | 2018-06-01 | 2019-12-12 | 国立大学法人 鹿児島大学 | Spindle device |
| JP7231148B2 (en) | 2018-06-01 | 2023-03-01 | 国立大学法人 鹿児島大学 | Spindle device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130717 Termination date: 20131228 |