CN203610779U - Flexible non-resonant three-dimensional elliptical diamond vibration cutting device - Google Patents
Flexible non-resonant three-dimensional elliptical diamond vibration cutting device Download PDFInfo
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- CN203610779U CN203610779U CN201320723272.5U CN201320723272U CN203610779U CN 203610779 U CN203610779 U CN 203610779U CN 201320723272 U CN201320723272 U CN 201320723272U CN 203610779 U CN203610779 U CN 203610779U
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Abstract
The utility model relates to a flexible non-resonant three-dimensional elliptical diamond vibration cutting device and belongs to the technical field of ultra-precision cutting and complicated optical part machining for materials difficult to machine. An upper flexible hinge and a lower flexible hinge are vertically assembled; the upper flexible hinge is connected to a lower flexible hinge connecting hole I and a lower flexible hinge connecting hole II of the lower flexible hinge through an upper flexible hinge connecting hole I and an upper flexible hinge connecting hole II by screws respectively; a piezoelectric stack I and a piezoelectric stack II are pre-tightened and arranged on the lower flexible hinge through a pre-tightening threaded hole I and a pre-tightening threaded hole II by bolts respectively; a piezoelectric stack III is pre-tightened and arranged on the upper flexible hinge through a pre-tightening threaded hole III by a bolt; a diamond cutting tool is arranged on a threaded hole of the upper flexible hinge by a bolt. The flexible non-resonant three-dimensional elliptical diamond vibration cutting device has the advantages that the elliptical orbit of a diamond tool bit in any space planes can be accurately realized; the parameter adjustment range is larger; the flexible device can be arranged on a random machine tool and has certain universality.
Description
Technical field
The utility model belongs to Ultra-precision machining and the complicated optical element processing technique field of difficult-to-machine material, particularly relates to the three-dimensional elliptical vibration cutting of a kind of off-resonance flexible apparatus.
Background technology
Along with scientific and technological fast development, also more and more higher for the requirement of machining accuracy at some high-precision part manufacture fields in recent years, diamond cutter has been made important contribution for the processing of high precision part, but due to the restriction of conventional machining process, need badly in processing method and break through for the Precision Machining of difficult-to-machine material, vibrocutting needs based on this just and produces, vibrocutting is used the vibration in process, effectively avoid the Fast Wearing of diamond cutter, extend cutter life, improved machining accuracy.
With regard to current vibrocutting state of development, three phases has been experienced in vibrocutting:
(1) one dimension vibrocutting.One dimension vibrocutting is subject to whole world scholar's extensive concern from the cutting of successful Application in 1966 and difficult-to-machine material, but due to the pressing characteristic of knife face after cutter, aspect cutter life prolongation, cannot make larger contribution.
(2) Two dimensional cutting (also claiming elliptical vibration cutting Elliptical Vibration Cutting, hereinafter to be referred as EVC).Two dimensional cutting the people such as was taught in 1993 by this English of society two of Nagoya University and is proposed first, and by relevant experimental study, result of study shows, Two dimensional cutting can suppress flutter, reduces cutting force, improves machining accuracy and surface quality, minimizing tool wear, improves cutter life, realize fragile material ductility cutting etc.For example, but elliptical vibration cutting has also existed some defects in essence: the oval plane that produces is fixed, and cannot meet the requirement of processed complex curved surface, the EVC device frequency of resonance type can not be adjusted etc.
(3) three-dimensional vibrating cutting (also claiming three-dimensional elliptical vibration cutting 3D Elliptical Vibration Cutting, hereinafter to be referred as 3D EVC).3D EVC develops on the basis of EVC, has drawn that EVC has advantages of, has overcome the defect that EVC exists, and is considered to the most potential current a kind of ultraprecise processing method.
Mainly contain Japanese Kobe University and Nagoya University for the research of vibrocutting in the world, the Bremen university of Germany, North Carolina university of the U.S. and Northwest University, NUS, the domestic research about vibrocutting mainly concentrates on Jilin University, BJ University of Aeronautics & Astronautics, The Hong Kong Polytechnic University, Xiamen University, Deng Jisuo colleges and universities of Institutes Of Technology Of He'nan.For the research of vibration cutting device, main two types of concentrating at present: resonance type and off-resonance type.
The most outstanding feature of resonance type vibration cutting device is that the frequency of processing is higher, the document that can look into is at present recorded, the highest processing frequency can reach 60KHZ, its maximum shortcoming is that device relies on the processing of resonating of self intrinsic frequency, cause the frequency of processing to adjust, and between each vibration shape, drive and easily produce coupling, the difficulty of controlling strengthens, so the processing unit (plant) of off-resonance type is subject to researcher's welcome gradually at present, what the off-resonance type device of EVC can be looked at present has two parallel or two arranged perpendicular modes, its shortcoming is that generated elliptic plane is fixed, have some limitations for complex-curved processing, on this basis, the three-dimensional elliptical vibration cutting of off-resonance has overcome above all shortcomings, but the research of the three-dimensional oval topping machanism of off-resonance, also need to break through.
What the three-dimensional oval topping machanism patent of current existing off-resonance can be looked into has: the three-dimensional elliptical vibration cutting process of a kind of mixing that patent (CN102078967A) is mentioned, diamond point of a knife can be at space generating three-dimensional elliptical trajectory, but the limitation of its piezoelectric stack position, cause its three-dimensional elliptical trajectory generating in a side of diamond cutter, to have some limitations.The three-dimensional elliptical trajectory of the oval topping machanism of three-dimensional that patent (CN102059575A) is mentioned equally can only be in a side of diamond cutter, and parameter adjustment is limited in scope, and has relatively high expectations for lathe that can match machined, does not have generality.A kind of three-dimensional elliptical vibration cutting device that patent (CN102371359A) is mentioned has above-mentioned limitation too.
In sum, existing off-resonance three-dimensional elliptical vibration cutting device also exists some shortcomings.
Summary of the invention
The utility model provides a kind of off-resonance three-dimensional oval diamond vibrocutting flexible apparatus, thereby realizes the Ultra-precision machining of difficult-to-machine material.
The technical scheme that the utility model is taked is:
Upper flexible hinge and vertical assembling of lower flexible hinge, wherein going up flexible hinge connects hole one and upper flexible hinge by upper flexible hinge and connects that lower flexible hinge that hole two is connected to lower flexible hinge by screw respectively connects hole one and lower flexible hinge connects on hole two, piezoelectric stack one and piezoelectric stack two are arranged on lower flexible hinge by pretension screwed hole one and pretension screwed hole two pretensions by bolt respectively, piezoelectric stack three is arranged on upper flexible hinge by pretension screwed hole three pretensions by bolt, and diamond cutter is arranged on the screwed hole of upper flexible hinge by bolt.
Single hinge in upper flexible hinge described in the utility model is all straight circular hinges, and between hinge, becomes parallelogram to arrange.
In upper flexible hinge described in the utility model, comprise and independently gone up flexible hinge dynamic component.
Single hinge in lower flexible hinge described in the utility model is all straight circular hinges, and between hinge, becomes parallelogram to arrange.
In lower flexible hinge described in the utility model, comprise two and independently descended flexible hinge dynamic component one and lower flexible hinge dynamic component two.
On lower flexible hinge described in the utility model, have and lathe connecting hole.
The utility model adopts flexible hinge to assemble, piezoelectric stack drives and adopts two parallel vertical configuration modes, can accurately realize the elliptical orbit of diamond point of a knife at space arbitrary plane, and parameter adjustment scope is larger, flexible apparatus can be arranged on any lathe, has certain generality.
The utility model has the advantages that:
(1) overall flexibility device is combined by two main flexible hinges, and overall structure is relatively simple, is easy to manufacture, and the volume of flexible apparatus is little, and quality is little, is easy to realize the high frequency processing of flexible apparatus.
(2) the oval flexible apparatus of three-dimensional of the present utility model all adopts parallelogram flexible hinge, can fully guarantee the one-way of motion, and flexible apparatus can be arranged on any lathe by the screwed hole on base in flexible hinge 3, and applicability is stronger.
(3) the oval flexible apparatus of three-dimensional of the present utility model is driven by three piezoelectric stacks, what take is non-resonant mode, and three-dimensional ellipse can drive the parameter of signal to adjust by piezoelectric stack, the position of space three-dimensional ellipse, be not subject to the restriction of piezoelectricity configuration mode, can adjust arbitrarily.
(4) in the oval flexible apparatus of three-dimensional of the present utility model, three piezoelectric stacks drive and drive respectively independently flexible hinge, do not have each other coupling, can realize the control accuracy that flexible apparatus is higher.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the axonometric drawing of flexible hinge on the utility model;
Fig. 3 is the axonometric drawing of flexible hinge under the utility model;
Fig. 4 is the utility model trace generator figure;
Fig. 5 is the three-dimensional oval diamond vibrocutting flexible apparatus control block diagram of the utility model off-resonance.
The specific embodiment
The assembling vertical with lower flexible hinge 3 of upper flexible hinge 2, wherein going up flexible hinge 2 connects hole 1 and upper flexible hinge by upper flexible hinge and connects that lower flexible hinge that hole 2 205 is connected to lower flexible hinge 3 by screw respectively connects hole 1 and lower flexible hinge connects on hole 2 307, piezoelectric stack 1 and piezoelectric stack 2 103 are arranged on lower flexible hinge 3 by pretension screwed hole 1 and pretension screwed hole 2 303 pretensions by bolt respectively, piezoelectric stack 3 102 is arranged on upper flexible hinge 2 by pretension screwed hole 3 201 pretensions by bolt, diamond cutter 4 is arranged on the screwed hole 203 of upper flexible hinge 2 by bolt.
Single hinge in upper flexible hinge 2 described in the utility model is all straight circular hinges, and between hinge, becomes parallelogram to arrange.
In upper flexible hinge 2 described in the utility model, comprise and independently gone up flexible hinge dynamic component 204.
Single hinge in lower flexible hinge 3 described in the utility model is all straight circular hinges, and between hinge, becomes parallelogram to arrange.
Two independently hinge dynamic component 1 and hinge dynamic components 2 306 in lower flexible hinge 3 described in the utility model, are comprised.
On lower flexible hinge 3 described in the utility model, have and lathe connecting hole 302.
The utility model is arranged on the guide rail of lathe, and the diamond cutter 4 on upper flexible hinge 2 is driven the three-dimensional elliptic motion that produces high frequency by three piezoelectric stacks, and the driving signal of three piezoelectric stacks is as follows:
Space coordinate conversion through motion with tool rest parameter, as shown in Figure 4, it is as follows that the coordinates of motion of diamond tool cusp generate formula:
In formula, x
ct, y
ctand z
ctit is the cartesian coordinate of diamond tool cusp; A
1, A
2, A
3it is respectively the vibration amplitude of three Piezoelectric Driving;
it is respectively the phase shift of three Piezoelectric Driving; W is vibration frequency; T is time variable; l
1the distance of connection holes 307 to connecting hole 305 axle center, l
2it is the vertical range of diamond point of a knife and hole 305,307 place straight lines.
According to formula (1)-(2), drive signal y1, y2, the initial phase of y3 by these three piezoelectric stacks of active accommodation
making the phase difference between each initial phase is not 0, and the point of a knife point of diamond cutter just can produce a three-dimensional elliptical trajectory in cartesian coordinate system.
Fig. 5 shows the control system block diagram of the simplification of the utility model employing, wherein mainly includes: lathe, workpiece, revolution grating, interface board, diamond cutter, piezoelectric stack, power amplifier, high performance controller.
According to Fig. 1-Fig. 5, the utility model working method is as follows:
1, by clamping workpiece, on machine tool chief axis, main shaft gyration is realized the rotary feed campaign of workpiece, gathers main shaft transient state corner by angular displacement grationg.
2. the utility model is arranged on the guide rail of numerically controlled lathe, drive to three piezoelectric stacks and apply control signal, the parameter that applies signal by adjusting piezoelectric stack, makes diamond point of a knife produce desirable space three-dimensional elliptical orbit, generates the principal cutting movement of vibrocutting.
3. by the track of planning diamond tool cusp elliptic motion, machine cut parameter is set, creates into ideal surface.
4. by a high performance controller, to realize the tracking control to angle of eccentricity detection, 3 driving elements and three-dimensional elliptical trajectory.
Claims (6)
1. the three-dimensional oval diamond vibrocutting flexible apparatus of off-resonance, it is characterized in that: upper flexible hinge and vertical assembling of lower flexible hinge, wherein going up flexible hinge connects hole one and upper flexible hinge by upper flexible hinge and connects that lower flexible hinge that hole two is connected to lower flexible hinge by screw respectively connects hole one and lower flexible hinge connects on hole two, piezoelectric stack one and piezoelectric stack two are arranged on lower flexible hinge by pretension screwed hole one and pretension screwed hole two pretensions by bolt respectively, piezoelectric stack three is arranged on upper flexible hinge by pretension screwed hole three pretensions by bolt, diamond cutter is arranged on the screwed hole of upper flexible hinge by bolt.
2. the three-dimensional oval diamond vibrocutting flexible apparatus of off-resonance according to claim 1, is characterized in that: the single hinge in described upper flexible hinge is all straight circular hinges, and between hinge, becomes parallelogram to arrange.
3. the three-dimensional oval diamond vibrocutting flexible apparatus of off-resonance according to claim 2, is characterized in that: in described upper flexible hinge, comprised and independently gone up flexible hinge dynamic component.
4. the three-dimensional oval diamond vibrocutting flexible apparatus of off-resonance according to claim 1, is characterized in that: the single hinge in described lower flexible hinge is all straight circular hinges, and between hinge, becomes parallelogram to arrange.
5. the three-dimensional oval diamond vibrocutting flexible apparatus of off-resonance according to claim 4, is characterized in that: in described lower flexible hinge, comprised two and independently descended flexible hinge dynamic component one and lower flexible hinge dynamic component two.
6. the three-dimensional oval diamond vibrocutting flexible apparatus of off-resonance according to claim 1, is characterized in that: on described lower flexible hinge, have and lathe connecting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320723272.5U CN203610779U (en) | 2013-11-17 | 2013-11-17 | Flexible non-resonant three-dimensional elliptical diamond vibration cutting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320723272.5U CN203610779U (en) | 2013-11-17 | 2013-11-17 | Flexible non-resonant three-dimensional elliptical diamond vibration cutting device |
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| CN203610779U true CN203610779U (en) | 2014-05-28 |
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| CN201320723272.5U Withdrawn - After Issue CN203610779U (en) | 2013-11-17 | 2013-11-17 | Flexible non-resonant three-dimensional elliptical diamond vibration cutting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103611988A (en) * | 2013-11-17 | 2014-03-05 | 长春工业大学 | Non-resonant three-dimensional elliptical diamond vibration cutting flexible unit |
| CN106141761A (en) * | 2016-07-26 | 2016-11-23 | 南京航空航天大学 | The three-D ultrasonic elliptical vibration cutting device of parallel-connection structure and track production method |
-
2013
- 2013-11-17 CN CN201320723272.5U patent/CN203610779U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103611988A (en) * | 2013-11-17 | 2014-03-05 | 长春工业大学 | Non-resonant three-dimensional elliptical diamond vibration cutting flexible unit |
| CN106141761A (en) * | 2016-07-26 | 2016-11-23 | 南京航空航天大学 | The three-D ultrasonic elliptical vibration cutting device of parallel-connection structure and track production method |
| CN106141761B (en) * | 2016-07-26 | 2018-02-16 | 南京航空航天大学 | The three-D ultrasonic elliptical vibration cutting device and track production method of parallel-connection structure |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140528 Effective date of abandoning: 20150812 |
|
| RGAV | Abandon patent right to avoid regrant |