CN202639967U - Adjustable frequency rapid servo feed device based on flexible hinge amplifying structure - Google Patents
Adjustable frequency rapid servo feed device based on flexible hinge amplifying structure Download PDFInfo
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- CN202639967U CN202639967U CN 201220351027 CN201220351027U CN202639967U CN 202639967 U CN202639967 U CN 202639967U CN 201220351027 CN201220351027 CN 201220351027 CN 201220351027 U CN201220351027 U CN 201220351027U CN 202639967 U CN202639967 U CN 202639967U
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- flexible hinge
- piezoelectric actuator
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- prestressing force
- feed device
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Abstract
The utility model provides an adjustable frequency rapid servo feed device based on a flexible hinge amplifying structure. The adjustable frequency rapid servo feed device comprises a base (1), a prestress film (2), a tool support (3), a rotary 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 rotary beam (4). One end of the rotary beam (4) is fixed on the base (1) through a flexible hinge, the other end of the rotary beam (4) is fixed on the tool support (3) through the flexible hinge, the tool support (3) used for installation of a tool 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 tool support (3) and the rotary beam (4) are of an integration structure. The adjustable frequency rapid servo feed device can reduce inertia of the rapid servo tool, can control cutting force of the tool easily, and is high in cutting speed, small in impact force and high in cutting quality. In addition, inherent frequency of the feed device can be adjusted by adjusting pre-tightening force added to the prestress film.
Description
Technical field
The utility model is the adjustable fast response servo feed arrangement of a kind of frequency based on the flexible hinge enlarger, be particularly related to a kind of feed arrangement that passes through sharp knife servo principle processing optical free form surface with diamond cutter, be specifically related to based on the adjustable fast response servo feed arrangement of the frequency of flexible hinge enlarger and prestressing force film.The renovation technique that belongs to the adjustable fast response servo feed arrangement of frequency.
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 is studied and has obtained some achievements to the fast response servo system.Such as: aspect cutter drives, adopt voice coil motor.Voice coil motor has the 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 the characteristics such as that piezoelectric actuator has is low in energy consumption, generation power large, response is fast are good displacement compensation devices.Like this, under the cooperation of voice coil motor and piezoelectric actuator, fast tool servo just can be realized the motion expected.In addition, although piezoelectric actuator can bear very large 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 may be subject in the process simultaneously, is damaged to avoid it.
Existing servo feed arrangement generally directly drives long stroke flexible hinge and cutter by voice coil motor, and load is excessive.If the projecting shaft with voice coil motor directly drives together moving linearly of long stroke flexible hinge, cutter, meeting is so that whole cutting load is too large, and inertia is large, affects machining accuracy, and the long stroke flexible hinge also can affect crudy in the creeping deformation situation simultaneously.Piezoelectric Driving then displacement is too small, and displacement amplifying mechanism produces unwanted displacement and the fixing characteristics of frequency, is difficult to satisfy the needs of freeform optics surface processing.
Summary of the invention
The purpose of this utility model is to consider the problems referred to above and a kind of inertia that reduces fast tool servo is provided, and is easy to control well the cutting force of cutter, improves the adjustable fast response servo feed arrangement of the frequency based on the flexible hinge enlarger of cutting quality.The utility model cutting speed is high, and impulsive force is little, and cutting quality is high.
The technical solution of the utility model is: the adjustable fast response servo feed arrangement of the frequency based on the flexible hinge enlarger of the present utility model, include pedestal, the prestressing force film, knives rack, rotating beam and piezoelectric actuator, one end of piezoelectric actuator is fixed on the pedestal, the other end of piezoelectric actuator is installed on the rotating beam, one end of rotating beam is fixed on the pedestal by flexible hinge, the other end of rotating beam is fixed on the knives rack by flexible hinge, the knives rack that is used for mounting cutter is connected with the prestressing force film, the two ends of prestressing force film are connected with pedestal respectively, and pedestal, the prestressing force film, knives rack and rotating beam are the integral type structure.
Above-mentioned prestressing force film is provided with two, and two prestressing force films be arranged in parallel.
The utility model is owing to adopting 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 by flexible hinge, the structure that the other end connects with knives rack by 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 in the horizontal direction than big displacement quantity under the driving of flexible hinge, simultaneously, two groups of prestressing force films have effectively reduced knives rack displacement in the vertical direction.In addition, can regulate the feed arrangement intrinsic frequency by the pretightning force that adjusting is added on the prestressing force film.The utlity model has following outstanding feature:
1) adopt piezoelectric actuator to drive in the horizontal direction precision feeding of fast tool servo, take full advantage of the advantages such as piezoelectric actuator is low in energy consumption, generation power large, response is fast, and by the enlarger that rotating beam, knives rack and flexible hinge form the displacement of piezoelectric actuator is amplified.
2) adopt the distortion of the symmetrical tension force active force of prestressing force film and knives rack to reduce knives rack displacement in vertical direction.
3) regulate the adjustment that realizes the feed arrangement structure frequency by the pretightning force of prestressing force film, satisfy the needs of different servo frequency.The moving component of whole mechanism is relatively light, has the characteristics such as inertia is little, speed is fast.
The utility model can reduce the inertia of fast tool servo, is easy to control well the cutting force of cutter, improves cutting quality.Piezoelectric actuator is relatively light by the parts that flexible amplification mechanism directly drives in the utility model, 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 by prestressed adjustment, regulates simple and convenient.The utility model is that a kind of design is ingenious, function admirable, the adjustable fast response servo feed arrangement of the convenient and practical frequency based on the flexible hinge enlarger.
Description of drawings
Fig. 1 is overall structure schematic diagram of the present utility model;
Fig. 2 is the state diagram when piezoelectric actuator is operated in maximum displacement place in the utility model.
The specific embodiment
Embodiment:
Structural representation of the present utility model such as Fig. 1, shown in 2, the adjustable fast response servo feed arrangement of frequency based on the flexible hinge enlarger of the present utility model, 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, 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 by flexible hinge, the other end of rotating beam 4 is fixed on the knives rack 3 by flexible hinge, 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 the integral type structure.Flexible hinge on the rotating beam 4 is directly made at rotating beam 4.Structure of the present utility model is except piezoelectric actuator 5, and remainder is 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 be arranged in parallel.The displacement that piezoelectric actuator 5 distortion produce is applied 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 by flexible hinge, because the restraining function of prestressing force film 2, the motion of knives rack 3 vertical direction is suppressed, and the main movement 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 by adjusting the pretightning force of prestressing force film 2, 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 utility model is as follows:
The order of work of the utility model feed arrangement 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 simultaneously rotating beam 4 and oppositely swings back under the restoring force effect of prestressing force film 2, realizes the withdrawing process.
Like this, execute alive size and Orientation by changing piezoelectric actuator 5, can constantly realize feed, withdrawing.
Claims (2)
1. adjustable fast response servo feed arrangement of the frequency 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) by flexible hinge, the other end of rotating beam (4) is fixed on the knives rack (3) by flexible hinge, 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 the integral type structure.
2. the adjustable fast response servo feed arrangement of the frequency 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) be arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220351027 CN202639967U (en) | 2012-07-19 | 2012-07-19 | Adjustable frequency rapid servo feed device based on flexible hinge amplifying structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220351027 CN202639967U (en) | 2012-07-19 | 2012-07-19 | Adjustable frequency rapid servo feed device based on flexible hinge amplifying structure |
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| Publication Number | Publication Date |
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| CN202639967U true CN202639967U (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220351027 Withdrawn - After Issue CN202639967U (en) | 2012-07-19 | 2012-07-19 | Adjustable frequency rapid servo feed device based on flexible hinge amplifying structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102825490A (en) * | 2012-07-19 | 2012-12-19 | 广东工业大学 | Frequency-adjustable rapid servo cutter feeding device based on flexible hinge amplification mechanism |
| CN108747536A (en) * | 2018-06-08 | 2018-11-06 | 山东大学 | A kind of cam tensioning adjustable fast tool servo system of rigidity |
| CN111451546A (en) * | 2020-04-09 | 2020-07-28 | 山东大学 | Special-shaped hole boring device, machine tool and method |
| CN111496857A (en) * | 2020-04-27 | 2020-08-07 | 华中科技大学 | Vibration cutting device for high-speed tissue cutting, design method and imaging system |
-
2012
- 2012-07-19 CN CN 201220351027 patent/CN202639967U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102825490A (en) * | 2012-07-19 | 2012-12-19 | 广东工业大学 | Frequency-adjustable rapid servo cutter feeding device based on flexible hinge amplification mechanism |
| CN102825490B (en) * | 2012-07-19 | 2015-04-22 | 广东工业大学 | Frequency-adjustable rapid servo cutter feeding device based on flexible hinge amplification mechanism |
| CN108747536A (en) * | 2018-06-08 | 2018-11-06 | 山东大学 | A kind of cam tensioning adjustable fast tool servo system of rigidity |
| CN111451546A (en) * | 2020-04-09 | 2020-07-28 | 山东大学 | Special-shaped hole boring device, machine tool and method |
| CN111451546B (en) * | 2020-04-09 | 2021-09-14 | 山东大学 | Special-shaped hole boring device, machine tool and method |
| CN111496857A (en) * | 2020-04-27 | 2020-08-07 | 华中科技大学 | Vibration cutting device for high-speed tissue cutting, design method and imaging system |
| CN111496857B (en) * | 2020-04-27 | 2021-06-18 | 华中科技大学 | Vibration cutting device for high-speed tissue cutting, design method and imaging system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130102 Effective date of abandoning: 20150422 |