CN102825490A - Frequency-adjustable rapid servo cutter feeding device based on flexible hinge amplification mechanism - Google Patents
Frequency-adjustable rapid servo cutter feeding device based on flexible hinge amplification mechanism Download PDFInfo
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- CN102825490A CN102825490A CN2012102505247A CN201210250524A CN102825490A CN 102825490 A CN102825490 A CN 102825490A CN 2012102505247 A CN2012102505247 A CN 2012102505247A CN 201210250524 A CN201210250524 A CN 201210250524A CN 102825490 A CN102825490 A CN 102825490A
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Abstract
The invention discloses a frequency-adjustable rapid servo cutter feeding device based on a flexible hinge amplification mechanism, comprising a base (1), a prestress film (2), a cutter support (3), a rotating beam (4) and a piezoelectric actuator (5), wherein one end of the piezoelectric actuator (5) is fixed on the base (1), and the other end of the piezoelectric actuator (5) is arranged on the rotating beam (4); one end of the rotating beam (4) is fixed on the base (1) through a flexible hinge, and the other end of the rotating beam (4) is fixed on the cutter support (3) through a flexible hinge; the cutter support (3) for mounting a cutter is connected with the prestress film (2); two ends of the prestress film (2) are respectively connected with the base (1); and the base (1), the prestress film (2), the cutter support (3) and the rotating beam (4) are of an integrated structure. The frequency-adjustable rapid servo cutter feeding device is capable of reducing the inertia of a rapid servo cutter, easy for controlling the cutting force of the cutter, high in cutting speed, small in impact force and high in cutting quality. In addition, the inherent frequency of the cutter feeding device can be adjusted through adjusting the pretightening force applied on the prestress film.
Description
Technical field
The present invention is a kind of frequency adjustable fast response servo feed arrangement based on the flexible hinge enlarger; Be particularly related to a kind ofly, be specifically related to frequency adjustable fast response servo feed arrangement based on flexible hinge enlarger and prestressing force film with the feed arrangement of diamond cutter through sharp knife servo principle processing optical free form surface.The renovation technique that belongs to frequency adjustable fast response servo feed arrangement.
Background technology
In order to realize the accurate processing of freeform optics surface, it is particularly important that accurate, stable feed mechanism seems, because the quality of it and product is closely related.In addition, complicated freeform optics surface is because volume is little, and the precision height has proposed strict requirement to feed mechanism especially.Therefore, the fast response servo system of function admirable just becomes a good selection of the such curved surface of processing.In the fast response servo system, drive unit commonly used mainly contains four kinds: Lorentz force driver, piezo-electric device, magnetic deformation actuator and direct stress electromagnetic driver.Guiding mechanism commonly used has: air bearing and flexible hinge.At present, existing scholar has carried out research and has obtained some achievements the fast response servo system.Such as: aspect cutter drives, adopt voice coil motor.Voice coil motor has characteristics such as high frequency sound, high accuracy, high rate of acceleration, and its control is simple and reliable, need not reversing arrangement, and the life-span is long, is particularly suitable for the closed loop servo-control system of short stroke.Aspect bit shift compensation, then adopt piezoelectric actuator.Therefore characteristics such as that piezoelectric actuator has is low in energy consumption, generation power big, response is fast are good bit shift compensation devices.Like this, under the cooperation of voice coil motor and piezoelectric actuator, the fast response servo cutter just can be realized the motion expected.In addition, though piezoelectric actuator can bear very big compression on axis direction, tension shearing force and twisting resistance are easy to cause it to be damaged, and can not directly be used for driving diamond cutter.Therefore, flexible hinge is widely used in the fast response servo system, and it can accurately pass to cutter with the high frequency motion of piezoelectric actuator, can eliminate the non-axial force that piezoelectric actuator possibly receive in the process simultaneously, is damaged to avoid it.
Existing servo feed arrangement generally directly drives long stroke flexible hinge and cutter through voice coil motor, and load is excessive.If the projecting shaft with voice coil motor directly drives long stroke flexible hinge, cutter moving linearly together, can make whole cutting load too big, inertia is big, influences machining accuracy, and the long stroke flexible hinge also can influence crudy under the creeping deformation situation simultaneously.Piezoelectric Driving then displacement is too small, and displacement amplifying mechanism produces the characteristics of unwanted displacement and fixed-frequency, is difficult to satisfy the needs of freeform optics surface processing.
Summary of the invention
The objective of the invention is to consider the problems referred to above and a kind of inertia that reduces the fast response servo cutter is provided, be easy to control well the cutting force of cutter, improve the frequency adjustable fast response servo feed arrangement based on the flexible hinge enlarger of cutting quality.Cutting speed of the present invention is high, and impulsive force is little, and cutting quality is high.
Technical scheme of the present invention is: the frequency adjustable fast response servo feed arrangement based on the flexible hinge enlarger of the present invention; Include pedestal, prestressing force film, knives rack, rotating beam and piezoelectric actuator; One end of piezoelectric actuator is fixed on the pedestal, and the other end of piezoelectric actuator is installed on the rotating beam, and an end of rotating beam is fixed on the pedestal through flexible hinge; The other end of rotating beam is fixed on the knives rack through flexible hinge; The knives rack that is used for mounting cutter is connected with the prestressing force film, and the two ends of prestressing force film are connected with pedestal respectively, and pedestal, prestressing force film, knives rack and rotating beam are integral structure.
Above-mentioned prestressing force film is provided with two, and two prestressing force films laterally arrange.
The present invention is owing to adopt piezoelectric actuator as driving unit.One end of piezoelectric actuator is fixed on the pedestal, and the other end is fixed on the rotating beam, and an end of rotating beam is connected on the pedestal through flexible hinge, the structure that the other end connects with knives rack through flexible hinge.Rotating beam under the driving of piezoelectric actuator, do small rotatablely moving with respect to pedestal, and be exaggerated suitable multiple at the other end of rotating beam.So knives rack produces than big displacement quantity under the driving of flexible hinge in the horizontal direction, simultaneously, two groups of prestressing force films have effectively reduced the displacement of knives rack in vertical direction.In addition, can regulate the feed arrangement intrinsic frequency through the pretightning force that adjusting is added on the prestressing force film.The present invention has following outstanding feature:
1) adopt piezoelectric actuator to drive fast response servo cutter precision feeding in the horizontal direction; Made full use of advantages such as piezoelectric actuator is low in energy consumption, generation power big, response is fast, and the displacement of piezoelectric actuator has been amplified through the enlarger that rotating beam, knives rack and flexible hinge are formed.
2) adopt the distortion of prestressing force film symmetry tension force active force and knives rack to reduce knives rack displacement in vertical direction.
3) regulate the adjustment that realizes the feed arrangement structure frequency through the pretightning force of prestressing force film, satisfy the needs of different servo frequency.The moving component of entire mechanism is lighter relatively, has characteristics such as inertia is little, speed is fast.
The present invention can reduce the inertia of fast response servo cutter, is easy to control well the cutting force of cutter, improves cutting quality.Piezoelectric actuator is lighter relatively through the parts that flexible amplification mechanism directly drives among the present invention, and cutting speed is high, and impulsive force is little, and cutting quality is high.Simultaneously, this structure adopts the prestressing force film to reduce the displacement of vertical direction, and changes the intrinsic frequency of feed arrangement through prestressed adjustment, regulates simple and convenient.The present invention is that a kind of design is ingenious, function admirable, the convenient and practical frequency adjustable fast response servo feed arrangement based on the flexible hinge enlarger.
Description of drawings
Fig. 1 is an overall structure sketch map of the present invention;
State diagram when Fig. 2 is operated in maximum displacement place for piezoelectric actuator among the present invention.
The specific embodiment
Embodiment:
Structural representation of the present invention is like Fig. 1, shown in 2; Frequency adjustable fast response servo feed arrangement based on the flexible hinge enlarger of the present invention; Include pedestal 1, prestressing force film 2, knives rack 3, rotating beam 4 and piezoelectric actuator 5; One end of piezoelectric actuator 5 is fixed on the pedestal 1, and the other end of piezoelectric actuator 5 is installed on the rotating beam 4, and an end of rotating beam 4 is fixed on the pedestal 1 through flexible hinge; The other end of rotating beam 4 is fixed on the knives rack 3 through flexible hinge; The knives rack 3 that is used for mounting cutter is connected with prestressing force film 2, and the two ends of prestressing force film 2 are connected with pedestal 1 respectively, and pedestal 1, prestressing force film 2, knives rack 3 and rotating beam 4 are integral structure.Flexible hinge on the rotating beam 4 is directly made on rotating beam 4.Structure of the present invention is except that piezoelectric actuator 5, and remainder is an integral structure, is obtained through milling and spark machined by whole block material.
In the present embodiment, above-mentioned prestressing force film 2 is provided with two, and two prestressing force films 2 laterally arrange.The displacement that piezoelectric actuator 5 distortion produce affacts on the rotating beam 4; The rotation of driven rotary beam 4, and with the displacement of amplification piezoelectric driver 5, rotating beam 4 passes to knives rack 3 with displacement enlargement; Be that rotating beam 4 drives knives rack 3 motions of being supported by two prestressing force films 2 through flexible hinge; Because the restraining function of prestressing force film 2, the motion of knives rack 3 vertical direction is suppressed, and the main motion of generation is the motion of the servo required horizontal direction of sharp knife.In addition; The motional amplitude of knives rack 3 is relevant with the single order corner frequency of two cluster films 2 with frequency; Can be easy to be added in the pretightning force of prestressing force film 2 through adjusting; Thereby change the intrinsic frequency of sharp knife servo-drive system, realize the adjusting of intrinsic frequency, to adapt to the needs of piezo actuator different driving frequency.
Operation principle of the present invention is following:
The order of work of feed arrangement of the present invention mainly comprises feed, withdrawing.
1, feed process: when applying voltage; Piezoelectric actuator 5 is elongated, rotates around pedestal 1 thereby promote rotating beam 4, simultaneously the displacement of piezoelectric actuator 5 is amplified; And displacement enlargement passed to knives rack 3,3 of knives racks drive cutters mounted thereto and carry out feeding.
2, withdrawing process: when outage or apply backward voltage, piezoelectric actuator 5 counter motions, knives rack 3 to left movement, spurs rotating beam 4 simultaneously and oppositely puts back under the restoring force effect of prestressing force film 2, realization withdrawing process.
Like this, through changing the size and Orientation that piezoelectric actuator 5 applies voltage, can constantly realize feed, withdrawing.
Claims (2)
1. frequency adjustable fast response servo feed arrangement based on the flexible hinge enlarger; It is characterized in that including pedestal (1), prestressing force film (2), knives rack (3), rotating beam (4) and piezoelectric actuator (5); One end of piezoelectric actuator (5) is fixed on the pedestal (1); The other end of piezoelectric actuator (5) is installed on the rotating beam (4); One end of rotating beam (4) is fixed on the pedestal (1) through flexible hinge, and the other end of rotating beam (4) is fixed on the knives rack (3) through flexible hinge, and the knives rack (3) that is used for mounting cutter is connected with prestressing force film (2); The two ends of prestressing force film (2) are connected with pedestal (1) respectively, and pedestal (1), prestressing force film (2), knives rack (3) and rotating beam (4) are integral structure.
2. the frequency adjustable fast response servo feed arrangement based on the flexible hinge enlarger according to claim 1 is characterized in that above-mentioned prestressing force film (2) is provided with two, and two prestressing force films (2) laterally arrange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210250524.7A CN102825490B (en) | 2012-07-19 | 2012-07-19 | Frequency-adjustable rapid servo cutter feeding device based on flexible hinge amplification mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210250524.7A CN102825490B (en) | 2012-07-19 | 2012-07-19 | Frequency-adjustable rapid servo cutter feeding device based on flexible hinge amplification mechanism |
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| Publication Number | Publication Date |
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| CN102825490A true CN102825490A (en) | 2012-12-19 |
| CN102825490B CN102825490B (en) | 2015-04-22 |
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| CN201210250524.7A Expired - Fee Related CN102825490B (en) | 2012-07-19 | 2012-07-19 | Frequency-adjustable rapid servo cutter feeding device based on flexible hinge amplification mechanism |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883849A (en) * | 2014-03-28 | 2014-06-25 | 苏州大学 | Large-stoke nanometer positioning platform |
| CN105571802A (en) * | 2016-02-01 | 2016-05-11 | 苏州长菱测试技术有限公司 | Testing method and testing device for blade pretightening force |
| CN106735355A (en) * | 2016-12-14 | 2017-05-31 | 哈尔滨工业大学 | A kind of vibration cutting device based on domes characteristic |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01246036A (en) * | 1988-03-25 | 1989-10-02 | Omron Tateisi Electron Co | Slightly moving stage device |
| CN102139459A (en) * | 2011-04-02 | 2011-08-03 | 赵宏伟 | Cutter servo compensation driving device for micronano cutting |
| CN102528522A (en) * | 2012-03-05 | 2012-07-04 | 广东工业大学 | Fast tool servo device with adjustable rigidity |
| CN202317816U (en) * | 2011-11-08 | 2012-07-11 | 浙江师范大学 | Tool-rest driving platform of ultra-precision processing lathe based on bi-parallel flexible hinge |
| CN202639967U (en) * | 2012-07-19 | 2013-01-02 | 广东工业大学 | Adjustable frequency rapid servo feed device based on flexible hinge amplifying structure |
-
2012
- 2012-07-19 CN CN201210250524.7A patent/CN102825490B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01246036A (en) * | 1988-03-25 | 1989-10-02 | Omron Tateisi Electron Co | Slightly moving stage device |
| CN102139459A (en) * | 2011-04-02 | 2011-08-03 | 赵宏伟 | Cutter servo compensation driving device for micronano cutting |
| CN202317816U (en) * | 2011-11-08 | 2012-07-11 | 浙江师范大学 | Tool-rest driving platform of ultra-precision processing lathe based on bi-parallel flexible hinge |
| CN102528522A (en) * | 2012-03-05 | 2012-07-04 | 广东工业大学 | Fast tool servo device with adjustable rigidity |
| CN202639967U (en) * | 2012-07-19 | 2013-01-02 | 广东工业大学 | Adjustable frequency rapid servo feed device based on flexible hinge amplifying structure |
Non-Patent Citations (1)
| Title |
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| 于志远等: "基于柔性铰链的微位移放大机构设计", 《仪器仪表学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883849A (en) * | 2014-03-28 | 2014-06-25 | 苏州大学 | Large-stoke nanometer positioning platform |
| CN105571802A (en) * | 2016-02-01 | 2016-05-11 | 苏州长菱测试技术有限公司 | Testing method and testing device for blade pretightening force |
| CN105571802B (en) * | 2016-02-01 | 2018-01-16 | 苏州长菱测试技术有限公司 | The method of testing of blade pretightning force |
| CN106735355A (en) * | 2016-12-14 | 2017-05-31 | 哈尔滨工业大学 | A kind of vibration cutting device based on domes characteristic |
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| CN102825490B (en) | 2015-04-22 |
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Granted publication date: 20150422 Termination date: 20210719 |