CN102554282A - Multifunctional inductive electric spindle - Google Patents
Multifunctional inductive electric spindle Download PDFInfo
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- CN102554282A CN102554282A CN2012100272789A CN201210027278A CN102554282A CN 102554282 A CN102554282 A CN 102554282A CN 2012100272789 A CN2012100272789 A CN 2012100272789A CN 201210027278 A CN201210027278 A CN 201210027278A CN 102554282 A CN102554282 A CN 102554282A
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- rotor
- main shaft
- vibration
- electric
- induction
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Abstract
The invention discloses a multifunctional inductive electric spindle, which comprises a rotor of an induction motor and a stator of an induction motor, wherein the rotor is structurally integrated with a machine tool spindle, and the stator is arranged in a machine tool shell. A machining tool is mounted at the front end of the spindle, a tap is drawn from a midpoint of each winding of the stator and electrically connected with an electric controller, and at least three displacement sensors are evenly distributed around the front end of the rotor in the machine tool shell and respectively electrically connected with the electric controller. The displacement sensors are used for transmitting detected radial vibration displacement of the rotor or the tool to the electric controller, and the electric controller is used for controlling the strength and the direction of current led into each tap according to the radial vibration displacement, and generating controllable radial control force on the rotor to control vibration of the rotor and vibration of the tool during machining. Vibration of the electric spindle or vibration of the tool during machining can be controlled simply, economically and conveniently.
Description
Technical field
The present invention relates to the electric main shaft of high-speed machine tool, especially a kind of multi-functional induction type electricity main shaft.
Background technology
High speed machining is one of advanced manufacturing technology of tool development prospect 21 century.High-speed machining not only can improve the working (machining) efficiency of part significantly, reduces process time and cost, but also can improve the machining accuracy and the surface quality of part.The high-speed numeric control lathe is the precondition that realizes High-speed machining, and it is not only the basis and the strategic industry of equipment manufacture, and how much the height of its technical merit and owning amount also is the sign of weighing a national manufacturing industry level height.The electricity main shaft is the core component of high-speed machine tool, and its performance quality has determined the machining accuracy and the quality of whole lathe to a great extent.
The electricity main shaft is that drive motor is integrated on the machine tool chief axis, and the function of drive motor and machine tool chief axis is combined together.Generally be that the motor stator that has coolant jacket is assemblied in the housing of main axle unit, the rotary part of motor rotor and machine tool chief axis is made of one, and process tool is installed in the end.Compare with the machine tool chief axis of traditional separate type; The electricity main shaft is owing to saved middle speed change and transmission device directly drives cutter work; Have that compact conformation, efficient are high, response is fast, in light weight, inertia is little, noise is low, precision is high, be prone to realize stepless speed regulation, adopt closed-loop control not only can satisfy the requirement of low speed high torque but also have in addition and be easy to realize high speed, dynamic property and stable characteristics such as better.Because induction conductivity is simple in structure, easy to manufacture, cost is low, operation maintenance is convenient, absence of collector and carbon brush, reliability is high, not limited by the field of employment, so electric main shaft in the market is main with induction conductivity mainly.
Yet, because the electro-magnetic exciting force that magnetic field produced in caused flutter and the electric main shaft induction conductivity air gap in the mechanical exciting force that mass unbalance produced, High-speed machining process of each parts on the electric main shaft, thereby cause the vibration of electric main shaft.The mass unbalance of each parts is that, reasons such as material inhomogeneous, processing technology and process tool asymmetric owing to motor rotor structure cause on the electricity main shaft; The center of gravity of electric spindle rotor is not overlapped with the geometric center of motor; The uneven exciting force that the electricity main shaft produces when rotated; Thereby cause that the rotor center axis of inertia does not overlap with axis of rotation, produce vibration.Any electric main shaft all exists certain quality uneven, though through electric main shaft is carried out dynamic balancing, can reduce the uneven level of rotor, can't eliminate fully.The electro-magnetic exciting force that electricity main shaft induction conductivity air-gap field produces is to be produced by asymmetrical magnetic field in the induction conductivity air gap.Asymmetrical magnetic field is to be caused by the harmonic component in the motor stator currents on the one hand in the induction conductivity air gap, is because motor rotor or the asymmetric of stator structure cause on the other hand.The electromagnetic excitation power that the induction conductivity air-gap field is produced applies extra magnetic pumping to rotor, causes the vibration of electric main shaft induction electric machine rotor.
For electric main shaft and the vibration that in process, produced thereof are controlled; Prior art is on electric main shaft, to add dynamic poise device or power actuator, and dynamic poise device and power actuator mainly contain multiple modes such as liquid-spraying type, mechanical type, electromagnetic type, motor-driven mechanical type, mechanical type damper, ER fluid dynamic vibration absorber, electromagnetic type damper, piezo-electric type actuator and built-in power actuator.Though some installs commercialization; Like the SBS system of the Schmitt Industries company of the electric main shaft with on-line automatic bascule of the Fischer company of Switzerland, the U.S., TABS system, the online balance sysmte of baladyne company and the Italian Marposs E of the company series of products etc. of Kennametal Hertel company; And on the electric main shaft of some lathes, obtained successful application; But these solutions all need be directly installed on the electric main shaft, because the physical dimension of itself is bigger, cost an arm and a leg; Adjustment process is very complicated, just on the low speed main shaft of large-scale grinding machine, uses at present.If can not change the basic structure of the bearing and the induction conductivity rotor of traditional electrical main shaft; Can produce the device of certain control as requested and on the body construction of electric main shaft, design a cover, so just can economy, realize electric main shaft and the vibration that in process, produced thereof are controlled easily.
Summary of the invention
The objective of the invention is to: a kind of multi-functional induction type electricity main shaft is provided; Under the prerequisite of not changing traditional electrical main shaft basic structure; Through simple adjustment, just can realize economical, easily electric main shaft and the vibration that in process, produced thereof are controlled to electric main shaft induction conductivity coil.
For realizing above-mentioned purpose, the present invention can take following technical proposals:
A kind of multi-functional induction type electricity main shaft of the present invention; The rotor that comprises the induction conductivity that is structure as a whole with machine tool chief axis; With the stator that is arranged on the induction conductivity in the lathe housing, front-end of spindle portion is equipped with process tool, all draws a tap from the mid point of the every phase winding of said stator; Each tap is electrically connected with an electric controller respectively; The surrounding rotor leading section also is evenly equipped with at least three displacement transducers in the lathe housing, and each said displacement transducer is electrically connected with said electric controller respectively: each said displacement transducer is used for the radial vibration displacement of detection rotor or cutter, and this radial vibration displacement is passed to electric controller; Said electric controller is according to the radial vibration displacement, and control feeds the size and Orientation of each tap electric current, on said rotor, producing controlled radially control, with the vibration of the cutter that causes in the vibration of controlling said rotor and the process.
Said induction conductivity is a monocyclic-start induction motor, or two-phase induction motor, or three phase induction motor, or polyphase induction motor.
Described electric main shaft is a surface-type or built-in, or the Lundell structure.
Described bearing is a rolling bearing, or sliding bearing, or magnetic bearing.
Compared with prior art the invention has the beneficial effects as follows: owing to adopt technique scheme; All draw a tap from the mid point of the every phase winding of said stator; Each tap is electrically connected with an electric controller respectively; The surrounding rotor leading section also is evenly equipped with at least three displacement transducers in the lathe housing; Each said displacement transducer is electrically connected with said electric controller respectively: each said displacement transducer is used for the radial vibration displacement of detection rotor or cutter, and this radial vibration displacement is passed to electric controller; Said electric controller is according to the radial vibration displacement; Control feeds the size and Orientation of each tap electric current; On said rotor, to produce controlled radially control; With the vibration of the cutter that causes in the vibration of controlling said rotor and the process, this structure, can be simply, economical, realize the vibration of the cutter that causes in electric main shaft or the process is controlled easily.
Description of drawings
Fig. 1 produces the radially schematic diagram of control of
direction on the rotor of the present invention;
Fig. 2 produces the radially schematic diagram of control of
direction on the rotor of the present invention;
Fig. 3 is a stator winding wiring diagram of the present invention;
Fig. 4 is the distributed architecture sketch map of stator winding of the present invention.
The specific embodiment
Shown in Fig. 1-4; The multi-functional induction type electricity of the present invention main shaft; Comprise the rotor 5 of the three phase induction motor that is structure as a whole with machine tool chief axis and be arranged on the stator 6 of the induction conductivity in the lathe housing, front-end of spindle portion 8 is equipped with process tool; Surrounding rotor leading section 8 is evenly equipped with three displacement transducers 9 in the lathe housing; Each said displacement transducer 9 is electrically connected with electric controller 7 respectively, and each said displacement transducer is used to detect the radial vibration displacement of main shaft or cutter, and this radial vibration displacement is passed to electric controller; Said electric controller 7 is according to the radial vibration displacement, and control feeds the size and Orientation of each tap electric current, on said rotor 5, to produce controlled radial load, to control the vibration of said rotor 5 (electric main shaft); Fig. 3 is a stator winding wiring diagram of the present invention;
phase winding is divided into two sub-windings of
and
two equal turn numbers; These two sub-windings in series connect; Draw a tap from the mid point of sub-winding
and
, this tap is electrically connected with said electric controller;
also takes the same structure with
winding; Draw a tap from the mid point of sub-winding
and
, this tap is electrically connected with said electric controller; Draw a tap from the mid point of sub-winding
and
, this tap is electrically connected with said electric controller.
Radially the schematic diagram of control is as shown in Figure 1 to produce
direction on the rotor of the present invention; Narration for ease; Air gap is divided into 1,2,3,4 four zone, and Fig. 2 is similar.In order to say something; Only provided the current conditions of
phase winding among the figure; If only in the A phase winding, feed torque current
(torque current of B, C phase winding is respectively
,
); Air gap flux density in the zone 1,2,3 and 4 is identical, so the Maxwell that receives of rotor 5 (electric main shaft) to make a concerted effort be zero.After feeding electric current
when from the mid-point tap of A phase winding toward winding (B, C phase winding the feeding electric current of mid-point tap be respectively
,
); Because the magnetic linkage in the zone 1 is constant; And the magnetic linkage in the zone 3 is in the opposite direction; The close just minimizing of synthetic magnetic in zone 3 like this, at this moment electric main shaft will receive the make a concerted effort effect of F of Maxwell on
direction in the radial direction.Radially the schematic diagram of control is as shown in Figure 2 for generation-
direction on the rotor 5 of the present invention; After feeding negative-phase sequence curent when from the mid-point tap of A phase winding toward winding, because the magnetic linkage in the zone 3 is constant; And the magnetic linkage in the zone 1 is in the opposite direction; The synthetic close minimizing of magnetic in zone 1; At this moment electric main shaft will receive the make a concerted effort effect of F of Maxwell on
direction in the radial direction, and will be as shown in Figure 2.
direction and control over the generation principle
orientation similar.As long as control feeds the size and Orientation of each tap electric current, just can go up and produce the controllable radial control like this, control the vibration of the cutter that causes in rotor 5 (electric main shaft) or the process at rotor 5 (electric main shaft).
As preferably, described electric main shaft is built-in.As preferably, said displacement transducer 9 is contactless vibrating sensor, also is provided with the acceleration transducer that is electrically connected with electric controller 7 and measures electric spindle vibration acceleration; Also be provided with electric current and voltage that the electric current that is electrically connected with electric controller 7 and voltage sensor are measured electric main shaft; Change the rotating speed of electric main shaft through the high frequency frequency converter; The size and Orientation that feeds electric current in the tap through control to change in real time to act on the radially size of control of rotor 5, thereby reaches the purpose of electric main shaft of control and the vibration of process tool place.
Fig. 4 has provided the distributed architecture sketch map of concrete stator winding.Two sub-windings in series of every phase winding connect.
Claims (4)
1. multi-functional induction type electricity main shaft; The rotor that comprises the induction conductivity that is structure as a whole with machine tool chief axis; With the stator that is arranged on the induction conductivity in the lathe housing; Front-end of spindle portion is equipped with process tool, it is characterized in that: all draw a tap from the mid point of the every phase winding of said stator, each tap is electrically connected with an electric controller respectively; The surrounding rotor leading section also is evenly equipped with at least three displacement transducers in the lathe housing, and each said displacement transducer is electrically connected with said electric controller respectively:
Each said displacement transducer is used for the radial vibration displacement of detection rotor or cutter, and this radial vibration displacement is passed to electric controller;
Said electric controller is according to the radial vibration displacement, and control feeds the size and Orientation of each tap electric current, on said rotor, producing controlled radially control, with the vibration of the cutter that causes in the vibration of controlling said rotor and the process.
2. multi-functional induction type electricity main shaft according to claim 1, it is characterized in that: said induction conductivity is a monocyclic-start induction motor, or two-phase induction motor, or three phase induction motor, or polyphase induction motor.
3. multi-functional induction type electricity main shaft according to claim 2, it is characterized in that: described electric main shaft is a surface-type or built-in, or the Lundell structure.
4. multi-functional induction type electricity main shaft according to claim 3, it is characterized in that: described bearing is a rolling bearing, or sliding bearing, or magnetic bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100272789A CN102554282A (en) | 2012-02-08 | 2012-02-08 | Multifunctional inductive electric spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100272789A CN102554282A (en) | 2012-02-08 | 2012-02-08 | Multifunctional inductive electric spindle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102554282A true CN102554282A (en) | 2012-07-11 |
Family
ID=46401646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100272789A Pending CN102554282A (en) | 2012-02-08 | 2012-02-08 | Multifunctional inductive electric spindle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102554282A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113695998A (en) * | 2021-10-28 | 2021-11-26 | 南通永锠数控机械科技有限公司 | Rotatable grinding digit control machine tool based on parts machining |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4037496A (en) * | 1976-09-01 | 1977-07-26 | The United States Of America As Represented By The United States Energy Research And Development Administration | Combination spindle-drive system for high precision machining |
| EP0451287A1 (en) * | 1989-11-02 | 1991-10-16 | Fanuc Ltd. | Main shaft motor control method |
| JPH04250903A (en) * | 1990-12-28 | 1992-09-07 | Fanuc Ltd | Driving mechanism for main spindle of machine tool |
| CN202438694U (en) * | 2012-02-08 | 2012-09-19 | 绍兴文理学院 | Multifunctional sensing type electric main shaft |
-
2012
- 2012-02-08 CN CN2012100272789A patent/CN102554282A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4037496A (en) * | 1976-09-01 | 1977-07-26 | The United States Of America As Represented By The United States Energy Research And Development Administration | Combination spindle-drive system for high precision machining |
| EP0451287A1 (en) * | 1989-11-02 | 1991-10-16 | Fanuc Ltd. | Main shaft motor control method |
| JPH04250903A (en) * | 1990-12-28 | 1992-09-07 | Fanuc Ltd | Driving mechanism for main spindle of machine tool |
| CN202438694U (en) * | 2012-02-08 | 2012-09-19 | 绍兴文理学院 | Multifunctional sensing type electric main shaft |
Non-Patent Citations (4)
| Title |
|---|
| 乔晓利 等: "基于内置力执行器的铣削颤振的主动控制", 《机械工程学报》 * |
| 周延祐 等: "电主轴技术讲座第二讲电主轴的基本参数与结构（一）", 《制造技术与机床》 * |
| 周延祐 等: "电主轴技术讲座第二讲电主轴的基本参数与结构（二）", 《制造技术与机床》 * |
| 边忠国 等: "位移传感器在磁悬浮电主轴中安装结构的改进", 《制造技术与机床》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113695998A (en) * | 2021-10-28 | 2021-11-26 | 南通永锠数控机械科技有限公司 | Rotatable grinding digit control machine tool based on parts machining |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120711 |