CN103611988B - A kind of off-resonance three-dimensional elliptical diamond vibrocutting flexible apparatus - Google Patents
A kind of off-resonance three-dimensional elliptical diamond vibrocutting flexible apparatus Download PDFInfo
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- CN103611988B CN103611988B CN201310571691.6A CN201310571691A CN103611988B CN 103611988 B CN103611988 B CN 103611988B CN 201310571691 A CN201310571691 A CN 201310571691A CN 103611988 B CN103611988 B CN 103611988B
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Abstract
The present invention relates to a kind of off-resonance three-dimensional elliptical diamond vibrocutting flexible apparatus, belong to Ultra-precision machining and the complicated optical effect correction technical field of difficult-to-machine material.Upper flexible hinge is vertical with lower flexible hinge to be assembled, wherein go up flexible hinge to connect hole one and upper flexible hinge by upper flexible hinge and connect lower flexible hinge that hole two is connected to lower flexible hinge by screw respectively and connect hole one and lower flexible hinge connects on hole two, piezoelectric stack one and piezoelectric stack two are arranged on lower flexible hinge by bolt by pretension screwed hole one and pretension screw thread two pretension respectively, piezoelectric stack three is arranged on upper flexible hinge by bolt by pretension screwed hole three pretension, and diamond cutter is arranged on the screwed hole of upper flexible hinge by bolt.Advantage accurately to realize the elliptical orbit of diamond point of a knife at space arbitrary plane, and parameter adjustment scope is comparatively large, and flexible apparatus can be arranged on any lathe, has certain generality.
Description
Technical field
The invention belongs to Ultra-precision machining and the complicated optical effect correction technical field of difficult-to-machine material, particularly relate to a kind of off-resonance three-dimensional elliptical vibrocutting flexible apparatus.
Background technology
Along with the fast development of science and technology, also more and more higher for the requirement of machining accuracy at some high-precision part manufacture fields in recent years, diamond cutter has made important contribution for the processing of high precision part, but due to the restriction of conventional machining process, Precision Machining for difficult-to-machine material is needed badly and is broken through in processing method, vibrocutting needs based on this just and produces, vibration in process is used by vibrocutting, effectively prevent the Fast Wearing of diamond cutter, extend cutter life, improve machining accuracy.
With regard to current vibrocutting state of development, vibrocutting experienced by three phases:
(1) one dimension vibrocutting.One dimension vibrocutting is subject to the extensive concern of whole world scholar from the cutting of successful Application in 1966 and difficult-to-machine material, but due to the pressing characteristic of knife face after cutter, cannot make larger contribution in tool bit life.
(2) Two dimensional cutting (also claiming elliptical vibration cutting Elliptical Vibration Cutting, hereinafter referred to as EVC).Two dimensional cutting the people such as to be 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 Ductile Grinding etc.But elliptical vibration cutting is also present in some defects in essence, such as: 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 adjust.
(3) three-dimensional vibrating cuts (also claiming three-dimensional elliptical vibrocutting 3D Elliptical Vibration Cutting, hereinafter referred to as 3D EVC).3D EVC develops on the basis of EVC, drawn that EVC has advantage, overcome the defect that EVC exists, be considered to the most potential current a kind of ultraprecise processing method.
Research in the world for vibrocutting mainly contains Japanese Kobe University and Nagoya University, 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 concentrated at present: resonance type and the non-co-vibration shape.
The most outstanding feature of resonance type vibration cutting device is that the frequency of processing is higher, the document can looked at present is recorded, the highest processing frequency can reach 60KHZ, its maximum shortcoming is that device relies on the intrinsic frequency of self to carry out resonance processing, the frequency of processing is caused to adjust, and drive between each vibration shape and easily produce coupling, the difficulty controlled strengthens, so the processing unit (plant) of the non-co-vibration shape is subject to the welcome of researcher gradually at present, what the non-co-vibration shape 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, complex-curved processing is had some limitations, on this basis, the vibrocutting of off-resonance three-dimensional elliptical overcomes above all shortcomings, but the research of off-resonance three-dimensional elliptical topping machanism, also need to break through.
What current existing off-resonance three-dimensional elliptical topping machanism patent can be looked into has: a kind of mixing three-dimensional elliptical vibrocutting method that patent (CN102078967A) is mentioned, diamond point of a knife can generate three-dimensional elliptical movement locus in space, but the limitation of its piezoelectric stack position, the three-dimensional elliptical movement locus causing it to generate in the side of diamond cutter, can only have some limitations.The three-dimensional elliptical topping machanism three-dimensional elliptical movement locus that patent (CN102059575A) is mentioned equally can only in the side of diamond cutter, and parameter adjustment is limited in scope, for can match machined lathe require higher, not there is 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 also exists some shortcomings.
Summary of the invention
The invention provides a kind of off-resonance three-dimensional elliptical diamond vibrocutting flexible apparatus, thus realize the Ultra-precision machining of difficult-to-machine material.
The technical scheme that the present invention takes is:
Upper flexible hinge is vertical with lower flexible hinge to be assembled, wherein go up flexible hinge to connect hole one and upper flexible hinge by upper flexible hinge and connect lower flexible hinge that hole two is connected to lower flexible hinge by screw respectively and connect hole one and lower flexible hinge connects on hole two, piezoelectric stack one and piezoelectric stack two are arranged on lower flexible hinge by bolt by pretension screwed hole one and pretension screw thread two pretension respectively, piezoelectric stack three is arranged on upper flexible hinge by bolt by pretension screwed hole three pretension, and diamond cutter is arranged on the screwed hole of upper flexible hinge by bolt.
Single hinge in upper flexible hinge of the present invention is all straight circular hinges, and becomes parallelogram to arrange between hinge.
Contain in upper flexible hinge of the present invention and independently go up flexible hinge dynamic component.
Single hinge in lower flexible hinge of the present invention is all straight circular hinges, and becomes parallelogram to arrange between hinge.
Contain two in lower flexible hinge of the present invention and independently descend flexible hinge dynamic component one and lower flexible hinge dynamic component two.
Lower flexible hinge of the present invention has and lathe connecting hole.
The present invention adopts flexible hinge to assemble, piezoelectric stack drives the parallel vertical configuration mode of employing two, accurately can 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.
Advantage of the present invention is:
(1) overall flexibility device is combined by two main flexible hinges, and overall structure is relatively simple, and be easy to manufacture, the volume of flexible apparatus is little, and quality is little, is easy to the high frequency processing realizing flexible apparatus.
(2) three-dimensional elliptical flexible apparatus of the present invention all adopts parallelogram flexible hinge, and fully can ensure the one-way of moving, flexible apparatus can be arranged on by the screwed hole on base in flexible hinge 3 on any lathe, and applicability is stronger.
(3) three-dimensional elliptical flexible apparatus of the present invention is driven by three piezoelectric stacks, what take is non-resonant mode, and three-dimensional elliptical can be adjusted by the parameter of piezoelectric stack drive singal, the position of space three-dimensional ellipse, not by the restriction of piezoelectricity configuration mode, can adjust arbitrarily.
(4) in three-dimensional elliptical flexible apparatus of the present invention, three piezoelectric stacks drive and drive independently flexible hinge respectively, there is not coupling each other, can realize the control accuracy that flexible apparatus is higher.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the axonometric drawing of flexible hinge in the present invention;
Fig. 3 is the axonometric drawing of flexible hinge under the present invention;
Fig. 4 is trace generator figure of the present invention;
Fig. 5 is off-resonance three-dimensional elliptical diamond vibrocutting flexible apparatus control block diagram of the present invention.
Detailed description of the invention
Upper flexible hinge 2 is vertical with lower flexible hinge 3 to be assembled, wherein go up flexible hinge 2 to connect hole 1 and upper flexible hinge by upper flexible hinge and connect lower flexible hinge that hole 2 205 is connected to lower flexible hinge 3 by screw respectively and connect 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 bolt by pretension screwed hole 1 and pretension screw thread 2 303 pretension respectively, piezoelectric stack 3 102 is arranged on upper flexible hinge 2 by bolt by pretension screwed hole 3 201 pretension, diamond cutter 4 is arranged on the screwed hole 203 of upper flexible hinge 2 by bolt.
Single hinge in upper flexible hinge 2 of the present invention is all straight circular hinges, and becomes parallelogram to arrange between hinge.
Contain in upper flexible hinge 2 of the present invention and independently go up flexible hinge dynamic component 204.
Single hinge in lower flexible hinge 3 of the present invention is all straight circular hinges, and becomes parallelogram to arrange between hinge.
Two independently hinge dynamic component 1 and hinge dynamic components 2 306 are contained in lower flexible hinge 3 of the present invention.
Lower flexible hinge 3 of the present invention has and lathe connecting hole 302.
The present invention is arranged on the guide rail of lathe, and the diamond cutter 4 on upper flexible hinge 2 drives the three-dimensional elliptical producing high frequency to move by three piezoelectric stacks, and the drive singal of three piezoelectric stacks is as follows:
Through the space coordinate conversion of motion with tool rest parameter, as shown in Figure 4, the coordinates of motion generation formula of diamond tool cusp is as follows:
In formula, x
ct, y
ctand z
ctit is the cartesian coordinate of diamond tool cusp; A
1, A
2, A
3the vibration amplitude of three Piezoelectric Driving respectively;
the phase shift of three Piezoelectric Driving respectively; 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 line.
According to formula (1)-(2), by these three piezoelectric stack drive singal y of active accommodation
1, y
2, y
3initial phase
make the phase difference between each initial phase not be 0, then the point of a knife point of diamond cutter just can produce a three-dimensional elliptical movement locus in cartesian coordinate system.
Fig. 5 shows the control system block diagram of the simplification that the present invention adopts, and wherein mainly includes: lathe, workpiece, revolution grating, interface board, diamond cutter, piezoelectric stack, power amplifier, high performance controller.
According to Fig. 1-Fig. 5, working method of the present invention is as follows:
1, by clamping workpiece on machine tool chief axis, main shaft gyration realizes the rotary feed campaign of workpiece, gathers main shaft transient state corner by angular displacement grationg.
2. the present invention is arranged on the guide rail of numerically controlled lathe, drive to three piezoelectric stacks and apply control signal, applied the parameter of signal by adjustment piezoelectric stack, make diamond point of a knife produce desirable space three-dimensional elliptical orbit, generate 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 detecting angle of eccentricity, the tracing control of 3 driving elements and three-dimensional elliptical movement locus.
Claims (6)
1. an off-resonance three-dimensional elliptical diamond vibrocutting flexible apparatus, it is characterized in that: above flexible hinge is vertical with lower flexible hinge assembles, wherein go up flexible hinge to connect hole one and upper flexible hinge by upper flexible hinge and connect lower flexible hinge that hole two is connected to lower flexible hinge by screw respectively and connect hole one and lower flexible hinge connects on hole two, piezoelectric stack one and piezoelectric stack two are arranged on lower flexible hinge by bolt by pretension screwed hole one and pretension screwed hole two pretension respectively, piezoelectric stack three is arranged on upper flexible hinge by bolt by pretension screwed hole three pretension, diamond cutter is arranged on the screwed hole of upper flexible hinge by bolt.
2. off-resonance three-dimensional elliptical diamond vibrocutting flexible apparatus according to claim 1, is characterized in that: the single hinge in described upper flexible hinge is all straight circular hinges, and becomes parallelogram to arrange between hinge.
3. off-resonance three-dimensional elliptical diamond vibrocutting flexible apparatus according to claim 2, is characterized in that: contain in described upper flexible hinge and independently go up flexible hinge dynamic component.
4. off-resonance three-dimensional elliptical diamond vibrocutting flexible apparatus according to claim 1, is characterized in that: the single hinge in described lower flexible hinge is all straight circular hinges, and becomes parallelogram to arrange between hinge.
5. off-resonance three-dimensional elliptical diamond vibrocutting flexible apparatus according to claim 4, is characterized in that: contain in described lower flexible hinge and independently descend flexible hinge dynamic component one and independently descend flexible hinge dynamic component two.
6. off-resonance three-dimensional elliptical diamond vibrocutting flexible apparatus according to claim 1, is characterized in that: described lower flexible hinge is provided with the connecting hole be connected with lathe.
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| CN201310571691.6A CN103611988B (en) | 2013-11-17 | 2013-11-17 | A kind of off-resonance three-dimensional elliptical diamond vibrocutting flexible apparatus |
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| CN201310571691.6A CN103611988B (en) | 2013-11-17 | 2013-11-17 | A kind of off-resonance three-dimensional elliptical diamond vibrocutting flexible apparatus |
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| CN103611988B true CN103611988B (en) | 2015-08-12 |
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| CN105127452A (en) * | 2015-10-03 | 2015-12-09 | 长春工业大学 | Parallel-type oval vibration turning device applicable to vertical type excircle machining |
| CN105127818B (en) * | 2015-10-03 | 2017-09-22 | 长春工业大学 | A kind of hinge tandem elliptical vibration cutting flexible apparatus |
| CN105149626B (en) * | 2015-10-03 | 2017-04-05 | 长春工业大学 | A kind of two piezoelectricity vertical ellipse vibration cutting devices for being suitable to vertical Excircle machining |
| CN105312679B (en) * | 2015-10-15 | 2017-08-04 | 南京航空航天大学 | Three-D ultrasonic elliptical vibration auxiliary cutting device and elliptical orbit production method |
| CN108577926B (en) * | 2018-05-17 | 2019-11-12 | 杭州电子科技大学 | A kind of biological tissue's saw cutting device and its sawing method |
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| JP2002103101A (en) * | 2000-09-22 | 2002-04-09 | Matsushita Electric Ind Co Ltd | Grinding method for parting chips, and apparatus therefor |
| JP3806603B2 (en) * | 2001-02-23 | 2006-08-09 | Ｔｏｗａ株式会社 | Oval vibration device and control method of elliptic vibration device |
| JP4973827B2 (en) * | 2001-03-30 | 2012-07-11 | 公益財団法人新産業創造研究機構 | Elliptical vibration cutting method |
| JP2004098230A (en) * | 2002-09-10 | 2004-04-02 | Canon Inc | Machining device, machining method, and displacement detection unit |
| JP5103620B2 (en) * | 2007-03-14 | 2012-12-19 | 国立大学法人名古屋大学 | Elliptical vibration cutting apparatus and elliptical vibration cutting method |
| CN101502971B (en) * | 2009-03-10 | 2010-12-01 | 北京航空航天大学 | High-frequency ultrasonic elliptical vibration cutting device |
| CN102059575B (en) * | 2010-11-26 | 2012-10-10 | 吉林大学 | Three-dimensional elliptic motion generating method and device for diamond cutter |
| CN102380626B (en) * | 2011-08-19 | 2013-01-02 | 清华大学 | Ultrasonic oval vibrating mechanism for assisting diamond cutter in ultra-precision cutting |
| CN102371359B (en) * | 2011-11-03 | 2013-05-08 | 吉林大学 | Three-dimensional elliptical vibration cutting device |
| CN203610779U (en) * | 2013-11-17 | 2014-05-28 | 长春工业大学 | Flexible non-resonant three-dimensional elliptical diamond vibration cutting device |
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Effective date of registration: 20200824 Address after: 130000 Changchun high tech Zone, Jilin, East Street, No. 155 Patentee after: CHANGCHUN BOXIN OPTOELECTRONIC Co.,Ltd. Address before: 130012 No. 2055, Yanan Avenue, Changchun, Jilin Patentee before: CHANGCHUN University OF TECHNOLOGY |
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