CN112448611A - Two-degree-of-freedom fast knife server driven by piezoelectric ceramics and driving method - Google Patents
Two-degree-of-freedom fast knife server driven by piezoelectric ceramics and driving method Download PDFInfo
- Publication number
- CN112448611A CN112448611A CN202011269099.7A CN202011269099A CN112448611A CN 112448611 A CN112448611 A CN 112448611A CN 202011269099 A CN202011269099 A CN 202011269099A CN 112448611 A CN112448611 A CN 112448611A
- Authority
- CN
- China
- Prior art keywords
- flexible
- degree
- piezoelectric ceramics
- freedom
- capacitive sensor
- 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.)
- Pending
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000007246 mechanism Effects 0.000 claims abstract description 79
- 238000006073 displacement reaction Methods 0.000 claims description 27
- 230000003321 amplification Effects 0.000 claims description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 4
- 230000003044 adaptive effect Effects 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/028—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors along multiple or arbitrary translation directions, e.g. XYZ stages
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/04—Constructional details
Abstract
The invention discloses a two-degree-of-freedom fast knife server driven by piezoelectric ceramics and a driving method, and mainly relates to the field of fast knife servers; the flexible tool rest comprises a flexible amplifying mechanism, a flexible guiding mechanism and a flexible tool rest output shaft; the right end of the flexible guide mechanism is connected with the flexible amplifying mechanism, and the left end of the flexible guide mechanism is connected with the output shaft of the flexible tool rest; piezoelectric ceramics are arranged on the front side and the rear side of the flexible amplifying mechanism, and the two piezoelectric ceramics are arranged on the flexible tool rest; the piezoelectric ceramic piezoelectric actuator has two degrees of freedom, can linearly move in a plane with two degrees of freedom, and has the advantages of large stroke, high resolution, adjustable piezoelectric ceramic pretightening force, small mechanism positioning error and the like.
Description
Technical Field
The invention relates to the field of fast knife servers, in particular to a two-degree-of-freedom fast knife server driven by piezoelectric ceramics and a driving method.
Background
With the development of industries such as precision optics and the like, optical parts having a free-form surface have been widely used in the fields of optical fiber communication, defense industry and the like. For such optical elements with complex surface shapes, the traditional processing method is hard to be sufficient. The fast knife servo system driven by the piezoelectric ceramics has the characteristics of high frequency response, high precision and high rigidity, so the fast knife servo system is particularly suitable for the high-efficiency and high-quality processing of the elements.
At present, most of the existing fast knife servo mechanisms driven by piezoelectric ceramics push a knife to move through a guide mechanism, or the piezoelectric ceramics push the knife to move through an amplification mechanism and the guide mechanism, and the knife can only output displacement with one degree of freedom. In practical application of some scenes, the tool is required to have two degrees of freedom of movement, so that the processing requirements of more types of surface parts are met.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a piezoelectric ceramic driven two-degree-of-freedom fast knife servo and a driving method thereof, wherein the piezoelectric ceramic driven two-degree-of-freedom fast knife servo has two degrees of freedom, can linearly move in a plane with two degrees of freedom, and has the advantages of large stroke, high resolution, adjustable piezoelectric ceramic pretightening force, small mechanism positioning error and the like.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a two-degree-of-freedom fast tool servo driven by piezoelectric ceramics comprises a flexible tool rest, wherein the flexible tool rest comprises a flexible amplifying mechanism, a flexible guide mechanism and a flexible tool rest output shaft;
the right end of the flexible guide mechanism is connected with the flexible amplifying mechanism, and the left end of the flexible guide mechanism is connected with the flexible tool rest output shaft;
piezoelectric ceramics are arranged on the front side and the rear side of the flexible amplifying mechanism, and the piezoelectric ceramics are arranged on the flexible knife rest.
Preferably, the flexible amplifying mechanism is a triangular amplifying mechanism, and the triangular amplifying mechanism is arranged in an axial symmetry manner.
Preferably, the flexible tool rest is provided with piezoelectric ceramic mounting holes corresponding to the piezoelectric ceramics, and the two piezoelectric ceramic mounting holes are respectively provided with a pre-tightening mechanism corresponding to the piezoelectric ceramics.
Preferably, the pre-tightening mechanism is a pre-tightening bolt in threaded connection with the piezoelectric ceramic mounting hole.
Preferably, the flexible amplifying mechanism and the flexible guiding mechanism are connected in a hinged mode.
Preferably, the flexible guide mechanism is a two-degree-of-freedom composite parallel guide mechanism which can guide in the axial direction and the tangential direction.
Preferably, the inboard of flexible guiding mechanism is equipped with the capacitive sensor mount, the left side of capacitive sensor mount is equipped with first capacitive sensor, the front side of capacitive sensor mount is equipped with second capacitive sensor, the one end that capacitive sensor mount was kept away from to first capacitive sensor, second capacitive sensor all with flexible guiding mechanism's inner wall butt.
Preferably, the outer side of the flexible knife rest is provided with a cover plate.
A driving method of a two-degree-of-freedom fast knife servo driven by piezoelectric ceramics,
when the axial displacement is output, the two piezoelectric ceramics input the same signal, and the output shaft of the flexible tool rest only outputs the axial displacement;
when the tangential displacement needs to be continuously output, the two piezoelectric ceramics input signals with the same change rate and opposite directions, and the output shaft of the flexible tool rest outputs the tangential displacement under the action of the flexible guide mechanism.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can output the displacement of two degrees of freedom in axial direction and tangential direction, and can meet the processing requirements of more surface type parts;
2. the two piezoelectric ceramics work together when moving in each degree of freedom, so that larger output force and larger output displacement can be ensured, and the use efficiency of the piezoelectric ceramics is improved;
3. the flexible guide mechanism adopts a two-degree-of-freedom composite parallel guide mechanism, axial displacement and tangential displacement can be fully decoupled, and mutual influence of output displacement in different directions is avoided;
4. the piezoelectric ceramics used in the invention can be pre-tightened and the pre-tightening force can be adjusted, so that the driving efficiency of the driver can be improved, and the working performance of the driver can be improved;
5. according to the invention, each piezoelectric ceramic is locked by two pre-tightening bolts, so that the pre-tightening bolts can be effectively prevented from loosening when the piezoelectric ceramic moves at high frequency, and the working performance of the driver is ensured to the maximum extent.
Drawings
FIG. 1 is a schematic view of the internal structure of the present invention;
FIG. 2 is a schematic diagram of the overall structure of the present invention;
fig. 3 is a schematic diagram of the drive signals of the present invention.
The reference numbers in the drawings: 1. a cutter bar; 2. a cutter; 301. a first capacitive sensor; 302. a second capacitive sensor; 4. a capacitive sensor mount; 501. a first piezoelectric ceramic; 502. a second piezoelectric ceramic; 6. a base; 7. a pre-tightening mechanism; 801. a flexible amplification mechanism; 802. a flexible guide mechanism; 803. a flexible tool rest output shaft; 9. and (7) a cover plate.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.
Example (b): as shown in fig. 1-3, the two-degree-of-freedom fast tool servo driven by piezoelectric ceramics according to the present invention includes a flexible tool rest and a base 6, wherein the flexible tool rest is mounted on the base 6 through a bolt, and the flexible tool rest includes a flexible amplification mechanism 801, a flexible guide mechanism 802, and a flexible tool rest output shaft 803.
Preferably, the flexible amplifying mechanism 801 is a triangular amplifying mechanism, the triangular amplifying mechanism is arranged in an axisymmetric manner by taking the central line of the flexible tool rest as a central axis, and the symmetric arrangement of the flexible amplifying mechanism 801 can eliminate parasitic displacement at the input end of the mechanism, so that the system precision is improved.
The right end of the flexible guide mechanism 802 is connected with the flexible amplifying mechanism 801, and the left end is connected with the flexible tool rest output shaft 803.
One end of the flexible tool rest output shaft 803, which is far away from the flexible guide mechanism 802, is provided with a tool bar 1, and a tool 2 is arranged on the tool bar 1.
For convenience of description, in fig. 1, the two piezoelectric ceramics are named as a first piezoelectric ceramic 501 and a second piezoelectric ceramic 502, respectively, and output displacement of the piezoelectric ceramics passes through the flexible amplification mechanism 801 and is output by the flexible tool rest output shaft 803 under the guiding action of the flexible guide mechanism 802 to drive the tool bar 1 to reciprocate.
Preferably, the flexible knife rest is provided with piezoelectric ceramic mounting holes which are adaptive to piezoelectric ceramics, two pre-tightening mechanisms 7 which are adaptive to the piezoelectric ceramics are arranged in the piezoelectric ceramic mounting holes, and the two piezoelectric ceramics are fixed in the piezoelectric ceramic mounting holes through the two pre-tightening mechanisms 7, so that the pre-tightening effect of the piezoelectric ceramics can be ensured, the rigidity and the working stability of the system are ensured, and the looseness is effectively prevented.
Furthermore, the pre-tightening mechanism 7 is a pre-tightening bolt in threaded connection with the piezoelectric ceramic mounting hole, and can also be realized by adopting other existing structures.
Preferably, the flexible amplification mechanism 801 and the flexible guide mechanism 802 are connected in an articulated manner.
Preferably, the flexible guide mechanism 802 is a two-degree-of-freedom composite parallel guide mechanism, which can guide in both axial and tangential directions, and can effectively eliminate other parasitic displacements.
Preferably, a capacitive sensor fixing frame 4 is arranged on the inner side of the flexible guide mechanism 802, the capacitive sensor fixing frame 4 is installed on a base 6, a first capacitive sensor 301 is installed on the left side of the capacitive sensor fixing frame 4, a second capacitive sensor 302 is installed on the front side of the capacitive sensor fixing frame 4, one ends, far away from the capacitive sensor fixing frame 4, of the first capacitive sensor 301 and one end, far away from the capacitive sensor fixing frame 4, of the second capacitive sensor 302 are abutted to the inner wall of the flexible guide mechanism 802, the first capacitive sensor 301 and the second capacitive sensor 302 are fixed on the base 6 through the capacitive sensor fixing frame 4, wherein the precision of the capacitive displacement sensor can reach a sub-nanometer level, the precision of the whole system is effectively guaranteed, the first capacitive sensor 301 and the second capacitive sensor 302 are used for detecting the displacement of the flexible tool rest output shaft 803 and transmitting, the displacement of the output shaft 803 of the flexible tool rest can be fed back to the piezoelectric ceramic in real time, closed-loop control is realized, and therefore the precision of the output displacement of the whole system is improved.
Preferably, the cover plate 9 is arranged on the outer side of the flexible tool rest, the cover plate 9 is installed on the outer side of the flexible tool rest through screws, chips and the like are prevented from entering the interior of the mechanism to influence the work of the mechanism, and the performance of the fast tool servo is guaranteed.
The fast knife servo driven by the piezoelectric ceramics can output displacement with two degrees of freedom of axial direction and tangential direction.
A driving method of a two-degree-of-freedom fast knife servo driven by piezoelectric ceramics comprises the following steps:
when the axial displacement is output, the same signal is input into the first piezoelectric ceramic 501 and the second piezoelectric ceramic 502, as shown at the time point 0-t1 in fig. 3, at this time, because the flexible amplification mechanism 801 and the flexible guide mechanism 802 are symmetrically arranged, the flexible tool rest output shaft 803 only outputs the axial displacement, and the first capacitance sensor 301 detects a real-time position and feeds back the real-time position to the controller until the time point t1 reaches a target position;
when the tangential displacement needs to be output continuously, input signals with the same change rate and opposite directions are input into the first piezoelectric ceramic 501 and the second piezoelectric ceramic 502, as shown at time t1-t2 in fig. 3, at this time, because one of the piezoelectric ceramics is elongated, the other piezoelectric ceramic is shortened, the elongation is equal to the shortening, the axial displacement output by the tail end of the flexible tool rest is zero, under the action of the flexible guide mechanism 802, the tail end of the flexible tool rest only outputs the tangential displacement, and similarly, the second capacitive sensor 302 detects a real-time position and feeds back the real-time position to the controller until the time t2 reaches a target position;
after one cutting is finished, as shown at time t2-t3 in fig. 3, the voltage of the two piezoelectric ceramics input voltages is reduced to 0, and then one-time feed processing can be realized.
Claims (9)
1. The utility model provides a two degree of freedom fast sword servo of piezoceramics driven, includes flexible knife rest, its characterized in that: the flexible tool rest comprises a flexible amplifying mechanism (801), a flexible guiding mechanism (802) and a flexible tool rest output shaft (803);
the right end of the flexible guide mechanism (802) is connected with the flexible amplifying mechanism (801), and the left end of the flexible guide mechanism is connected with the flexible tool rest output shaft (803);
the front side and the rear side of the flexible amplification mechanism (801) are both provided with piezoelectric ceramics, and the piezoelectric ceramics are both arranged on the flexible tool rest.
2. The piezoceramic driven two-degree-of-freedom fast knife servo as claimed in claim 1, wherein: the flexible amplifying mechanism (801) is a triangular amplifying mechanism, and the triangular amplifying mechanism is arranged in an axial symmetry mode.
3. The piezoceramic driven two-degree-of-freedom fast knife servo as claimed in claim 1, wherein: the flexible knife rest is provided with piezoelectric ceramic mounting holes which are adaptive to piezoelectric ceramics, and the two piezoelectric ceramic mounting holes are respectively provided with a pre-tightening mechanism (7) which is adaptive to the piezoelectric ceramics.
4. The piezoceramic driven two-degree-of-freedom fast knife servo as claimed in claim 3, wherein: the pre-tightening mechanism (7) is a pre-tightening bolt in threaded connection with the piezoelectric ceramic mounting hole.
5. The piezoceramic driven two-degree-of-freedom fast knife servo as claimed in claim 1, wherein: the flexible amplification mechanism (801) is connected with the flexible guide mechanism (802) in a hinged mode.
6. The piezoceramic driven two-degree-of-freedom fast knife servo as claimed in claim 1, wherein: the flexible guide mechanism (802) is a two-degree-of-freedom composite parallel guide mechanism and can guide in the axial direction and the tangential direction.
7. The piezoceramic driven two-degree-of-freedom fast knife servo as claimed in claim 1, wherein: the inboard of flexible guiding mechanism (802) is equipped with capacitive sensor mount (4), the left side of capacitive sensor mount (4) is equipped with first capacitive sensor (301), the front side of capacitive sensor mount (4) is equipped with second capacitive sensor (302), the one end that capacitive sensor mount (4) were kept away from in first capacitive sensor (301), second capacitive sensor (302) all with the inner wall butt of flexible guiding mechanism (802).
8. The piezoceramic driven two-degree-of-freedom fast knife servo as claimed in claim 1, wherein: and a cover plate (9) is arranged on the outer side of the flexible knife rest.
9. A driving method of a two-degree-of-freedom fast knife servo driven by piezoelectric ceramics according to any one of claims 1 to 8, characterized in that:
when the axial displacement is output, the two piezoelectric ceramics input the same signal, and the flexible tool rest output shaft (803) only outputs the axial displacement;
when the tangential displacement needs to be continuously output, the two piezoelectric ceramics input signals with the same change rate and opposite directions, and the flexible tool rest output shaft (803) outputs the tangential displacement under the action of the flexible guide mechanism (802).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011269099.7A CN112448611A (en) | 2020-11-13 | 2020-11-13 | Two-degree-of-freedom fast knife server driven by piezoelectric ceramics and driving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011269099.7A CN112448611A (en) | 2020-11-13 | 2020-11-13 | Two-degree-of-freedom fast knife server driven by piezoelectric ceramics and driving method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112448611A true CN112448611A (en) | 2021-03-05 |
Family
ID=74738706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011269099.7A Pending CN112448611A (en) | 2020-11-13 | 2020-11-13 | Two-degree-of-freedom fast knife server driven by piezoelectric ceramics and driving method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112448611A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080134848A1 (en) * | 2005-09-08 | 2008-06-12 | Heinrich Ostendarp | Actuator for moving a tool |
| CN102794664A (en) * | 2012-07-17 | 2012-11-28 | 广东工业大学 | Bridge-type flexible hinge based high-frequency ultra-precision machining lathe saddle driving platform |
| CN207953316U (en) * | 2018-03-21 | 2018-10-12 | 吉林大学 | A kind of large stroke and high precision two-freedom fast tool servo |
| CN108747534A (en) * | 2018-08-13 | 2018-11-06 | 广州铁路职业技术学院（广州铁路机械学校） | One kind having monoblock type flexible hinge and the adjustable fast tool servo device of rigidity |
| CN110370060A (en) * | 2019-07-12 | 2019-10-25 | 山东大学 | A kind of fast tool servo device of Piezoelectric Ceramic, part system of processing and method |
-
2020
- 2020-11-13 CN CN202011269099.7A patent/CN112448611A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080134848A1 (en) * | 2005-09-08 | 2008-06-12 | Heinrich Ostendarp | Actuator for moving a tool |
| CN102794664A (en) * | 2012-07-17 | 2012-11-28 | 广东工业大学 | Bridge-type flexible hinge based high-frequency ultra-precision machining lathe saddle driving platform |
| CN207953316U (en) * | 2018-03-21 | 2018-10-12 | 吉林大学 | A kind of large stroke and high precision two-freedom fast tool servo |
| CN108747534A (en) * | 2018-08-13 | 2018-11-06 | 广州铁路职业技术学院（广州铁路机械学校） | One kind having monoblock type flexible hinge and the adjustable fast tool servo device of rigidity |
| CN110370060A (en) * | 2019-07-12 | 2019-10-25 | 山东大学 | A kind of fast tool servo device of Piezoelectric Ceramic, part system of processing and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110370060B (en) | Piezoelectric ceramic driven fast tool servo, part machining system and method | |
| CN2900074Y (en) | Processing cutter mechanism capable of telescopically feeding | |
| CN111546087B (en) | Piezoelectric ceramic driven micro-feeding tool rest | |
| CN103963033B (en) | The one-dimensional micromotion platform of rigidity frequency-adjustable based on Stress stiffening principle | |
| CN112388370A (en) | Piezoelectric ceramic driven large-stroke constant-force fast knife servo device | |
| CN111890128A (en) | Force measurement type piezoelectric fast knife servo device with three-dimensional decoupling | |
| CN102371359A (en) | Three-dimensional elliptical vibration cutting device | |
| CN111843766B (en) | High-precision force and position hybrid control device for grinding and polishing of robot | |
| CN219233964U (en) | Three-degree-of-freedom large-stroke fast cutter servo device | |
| CN105429504A (en) | Bidirectional piezoelectric stack actuator with diamond and hourglass-shaped mechanisms connected in series and actuating method thereof | |
| CN102069201A (en) | Two-degree-of-freedom dynamic error counteracting device for free-form surface ultra-precision turning | |
| CN112448611A (en) | Two-degree-of-freedom fast knife server driven by piezoelectric ceramics and driving method | |
| CN105478813B (en) | A kind of intelligent compensation anti-vibration lathe tool and its control system | |
| CN104001943A (en) | Three-dimensional oval vibration turning head | |
| CN114123849A (en) | Double-freedom-degree self-decoupling large-rigidity large-stroke piezoelectric rapid servo tool rest | |
| CN106159079A (en) | A kind of improve piezoelectricity compliant mechanism output displacement and the structure of natural frequency | |
| CN104259991B (en) | Power control module based on stiffness variable compliant mechanism | |
| CN106181995B (en) | Power/position controllable type flexible actuator | |
| CN110653845B (en) | Variable-pitch end effector and method for carrying elastic thin-walled workpiece | |
| CN205324750U (en) | Intelligent compensation keeps away lathe tool that shakes and control system thereof | |
| CN112405108A (en) | Method for realizing ultra-precise parallel linear microstructure machining by using common machine tool | |
| CN114967778B (en) | Multi-flexible coupling beam vibration control device and method based on screw drive | |
| CN108858145B (en) | Synchronous motion control device and method for double-flexible robot | |
| CN115194194A (en) | Double-drive type double-freedom-degree large-stroke fast tool servo device | |
| CN210589272U (en) | Two-degree-of-freedom macro-micro precision positioning platform device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210305 |
|
| RJ01 | Rejection of invention patent application after publication |