CN105149626B - A kind of two piezoelectricity vertical ellipse vibration cutting devices for being suitable to vertical Excircle machining - Google Patents
A kind of two piezoelectricity vertical ellipse vibration cutting devices for being suitable to vertical Excircle machining Download PDFInfo
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- CN105149626B CN105149626B CN201510639807.4A CN201510639807A CN105149626B CN 105149626 B CN105149626 B CN 105149626B CN 201510639807 A CN201510639807 A CN 201510639807A CN 105149626 B CN105149626 B CN 105149626B
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- 238000005520 cutting process Methods 0.000 title claims abstract description 52
- 238000003754 machining Methods 0.000 title claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims abstract description 44
- 239000011159 matrix material Substances 0.000 claims abstract description 33
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 14
- 239000010432 diamond Substances 0.000 claims abstract description 14
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 238000007493 shaping process Methods 0.000 claims description 3
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
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Abstract
The present invention relates to a kind of two piezoelectricity vertical ellipse vibration cutting devices for being suitable to vertical Excircle machining, belong to micro-nano with super hot investment casting and difficult-to-machine material complexity optical effect correction technical field.Series connection integral type flexible hinge matrix is connected with two piezoelectric stacks respectively, displacement measurement baffle plate is arranged on series connection integral type flexible hinge matrix, capacitive displacement transducer is arranged on displacement transducer holder, displacement transducer holder is arranged on series connection integral type flexible hinge matrix, and diamond cutter is arranged on series connection integral type flexible hinge matrix front end by trip bolt.Advantage is：Structure is novel, series connection integral type flexible hinge matrix is formed by time processing, overall structure is relatively easy, it is easily fabricated, and greatly reduce due to assembling the error for causing, the small volume of the two piezoelectricity vertical ellipse vibration turning device, quality are little, it is easy to accomplish the high frequency machining of elliptical vibration.
Description
Technical field
The invention belongs to micro-nano and super hot investment casting and difficult-to-machine material complexity optical effect correction technical field, especially
It is to be related to a kind of two piezoelectricity vertical ellipse vibration cutting devices for being suitable to vertical Excircle machining.
Background technology
Recently as rapid technological growth, some precision component applications are also got over for the requirement on machining accuracy of part
Come higher, the application of diamond cutter plays an important role for the precision for improving precision component processing, but conventional machining process
Limit, when ferrous metal material is processed, the too fast part processing precision that result in of tool wear is difficult to improve a lot,
The Precision Machining of difficult-to-machine material is needed badly and is had breakthrough in processing method, vibrocutting is based on this to be needed and produce
Raw, the vibration in the course of processing is used by vibrocutting, and the intermittent cutting way of its uniqueness effectively prevent diamond
The Fast Wearing of cutter, extends cutting-tool's used life, improves part processing precision.
Vibrocutting was successfully applied in the cutting of difficult-to-machine material from 1966 and is subject to the extensive concern of whole world scholar,
But the pressing characteristic that knife face has after cutter in process, it is impossible to improve a lot in terms of cutter life is extended,
Professor of this English of society two of Nagoya University in 1993 et al. proposes elliptical vibration cutting (Elliptical Vibration first
Cutting concept), simultaneously for some difficult-to-machine materials such as hard alloy etc., has carried out correlation test, the result of research
Show, elliptical vibration cutting can suppress the tremor in the course of processing, greatly reduce cutting force, reduce cutter mill
Damage, extend cutter life, improve the suface processing quality of part, for fragile material can test ductility cutting etc..
Research currently for elliptical vibration cutting both at home and abroad mainly has Kobe University and the Nagoya University of Japan, Germany
Bremen universities, North Carolina universities of the U.S. and Northwest University, NUS, domestic Tsing-Hua University,
Jilin University, BJ University of Aeronautics ＆ Astronautics, Nanjing Aero-Space University, Harbin Institute of Technology, The Hong Kong Polytechnic University, Xiamen are big
Learn, Institutes Of Technology Of He'nan etc..What research was related to mainly has elliptical vibration cutting device, and elliptical vibration cutting path, ellipse shake
Crisp transformation performance is moulded in dynamic cutting control, elliptical vibration cutting difficult-to-machine material, and elliptical vibration cutting very low power processing characteristics is oval
Vibrocutting power etc..
The research of elliptical vibration cutting device is broadly divided into piezoelectric patches transducer ultrasonic oscillating mode device and Piezoelectric Driving is soft
Property hinge type non-co- vibration shape device.The former belongs to resonance type device, the characteristics of which is main can be realized during processing
Higher frequency, according to current statistics, elliptical vibration cutting processing frequency can reach 60KHZ, but resonance type
Elliptical vibration cutting device there is also in some defect, for example need in process according to the intrinsic of device itself
Frequency realizes resonance, and then carries out machining, and so, the frequency of processing can not just be adjusted, while between each first order mode
Coupling is produced easily, the difficulty of control is larger, so in the design aspect of device, non-co- vibration shape elliptical vibration cutting device is gradually
Paid close attention to by research worker, non-co- vibration shape elliptical vibration cutting device is usually to drive flexible hinge to form by piezoelectric stack,
The shape of flexible hinge, size and the method for salary distribution have all been affected on the effect of elliptical vibration cutting.According to flexible hinge
The method of salary distribution of chain carrys out the elliptical orbit of diamond synthesis point of a knife, and the elliptical vibration cutting device of design can generate two dimension at present
Elliptical trajectory and three-dimensional elliptical trajectory, scope that different tracks can process is different, elliptical vibration cutting
Non-co- vibration shape device is recorded according to current document, by flexible hinge is parallel and two kinds of flexible hinge tandem, the non-co- vibration shape
Elliptical vibration cutting device be typically all according to designed by horizontal lathe, device fix a cutting tool the elliptical trajectory plane to be formed with
Machine tool chief axis central axis, can form effectively intermittence cutting movement, and for vertical lathe, this kind of device is fixed a cutting tool
The elliptical trajectory plane of formation and machine tool chief axis centerline parallel, are unfavorable for forming intermittent cutting movement.
What existing off-resonance elliptical vibration cutting device patent can be looked at present has：Patent (CN102078967A) is referred to
A kind of mixing three-dimensional elliptical vibrocutting method, is used parallel flexible hinge, is driven using piezoelectric stack, should
Parallel device produces motion coupling due to being at right angles distributed between its each kinematic axis, easily, and control is got up highly difficult.Patent
(CN102059575A) the oval topping machanism for referring to, uses in-line flexible hinge, but in the design process, moves
The quality of part is larger, it is difficult to realize that high frequency cuts, parameter adjustment is limited in scope, for can match the lathe requirement of processing compared with
Height, not with universality.A kind of three-dimensional elliptical vibration cutting device that patent (CN102371359A) is referred to similarly has upper
State limitation, and there is not been reported to be directed to the elliptical vibration cutting device of vertical cylindrical turning.
In sum, existing off-resonance elliptical vibration cutting device also has some shortcomings.Therefore this must be directed to
A little weak points, study and propose a kind of new elliptical vibration cutting device, to realize the various difficult-to-machine materials of Diamond Cutting
And the not demand of coplanar type, obtain optimal machinability.
The content of the invention
The present invention provides a kind of two piezoelectricity vertical ellipse vibration cutting devices for being suitable to vertical Excircle machining, so as to realize standing
The Ultra-precision machining of difficult-to-machine material on formula lathe.
The present invention is adopted the technical scheme that：Piezoelectric stack pre-loading screw two is through on series connection integral type flexible hinge matrix
Hole three carry out pretension to piezoelectric stack two, piezoelectric stack pre-loading screw one is through the hole on series connection integral type flexible hinge matrix
Five pairs of piezoelectric stacks one carry out pretension, and displacement measurement baffle plate one and displacement measurement baffle plate two are arranged on string by trip bolt respectively
On the hole six and hole eight of connection integral type flexible hinge matrix, capacitive displacement transducer one and capacitive displacement transducer two are distinguished
Correspondence on the displacement transducer holder one and displacement transducer holder two, displacement transducer holder one and displacement transducer
Holder two is arranged on the Kong Si and hole two of series connection integral type flexible hinge matrix by trip bolt respectively, and diamond cutter leads to
Cross trip bolt to be arranged on the hole seven of series connection integral type flexible hinge matrix front end.
On the series connection integral type flexible hinge matrix of the present invention, two orthogonal flexible hinges adopt rectangular hinge,
And arrange into parallelogram between four subbranches included in single hinge, form single-degree-of-freedom closed system.
The series connection integral type flexible hinge matrix of the present invention adopts wire cutting integral type machine-shaping.
The series connection integral type flexible hinge matrix of the present invention is passed through hole one, is connected with force transducer with screw.
It is an advantage of the invention that：Structure is novel, and series connection integral type flexible hinge matrix is formed by time processing, overall structure
It is relatively easy, it is easy to manufacture, and greatly reduce due to assembling the error for causing, the two piezoelectricity vertical ellipse vibrates car
The small volume of turning device, quality are little, it is easy to accomplish the high frequency machining of elliptical vibration.Using flexible hinge it is all parallel
Tetragon, its advantage are can to reduce motion of growing nonparasitically upon another plant to the full extent, fully ensure that the unipolarity of motion, two piezoelectricity vertical ellipses
Vibration turning device can be arranged on force transducer by the screwed hole on base in integral type flexible hinge matrix of connecting, real
The now further optimization to cutting force, it is also possible to be directly installed on the guide rail of vertical lathe, simultaneously because device is overall high
Degree is less, higher for the suitability of lathe.The present invention is driven by two piezoelectric stacks, and what is taken is non-resonant mode, ellipse
Circle Parameters can be adjusted the position of space ellipse by piezoelectric stack drive signal, and two piezoelectric stacks drive and drive respectively
, there is no coupling in independent flexible hinge, can realize that two piezoelectricity vertical ellipse vibrocutting flexible apparatus are higher each other
Control accuracy.
Description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of present invention series connection integral type flexible hinge matrix；
Fig. 3 is trace generator figure of the present invention；
Fig. 4 is control principle block diagram of the present invention.
Specific embodiment
Piezoelectric stack pre-loading screw 29 is through 3 103 pairs, the hole piezoelectric stack two on series connection integral type flexible hinge matrix 1
13 carry out pretension, and piezoelectric stack pre-loading screw 1 is through 5 105 pairs, the hole piezo stack on series connection integral type flexible hinge matrix 1
Heap 1 carries out pretension, and displacement measurement baffle plate 1 and displacement measurement baffle plate 2 14 are arranged on series connection one by trip bolt respectively
On the hole 6 106 and hole 8 108 of formula flexible hinge matrix, capacitive displacement transducer 1 and capacitive displacement transducer 2 11
Corresponded on the displacement transducer holder 1 and displacement transducer holder 28 respectively, displacement transducer holder 1 and displacement
Sensor holder 28 is arranged on the hole 4 104 and hole 2 102 of series connection integral type flexible hinge matrix respectively by trip bolt
On, diamond cutter 2 is arranged on the hole 7 107 of 1 front end of series connection integral type flexible hinge matrix by trip bolt.
On the series connection integral type flexible hinge matrix 1 of the present invention, two orthogonal flexible hinges are cut with scissors using rectangle
Arrange into parallelogram between four subbranches included in chain, and single hinge, form single-degree-of-freedom closed system, condenser type
Displacement transducer 1, capacitive displacement transducer 2 11 is by detecting displacement measurement baffle plate 1 and displacement measurement baffle plate 2 14
Displacement carrys out the driving of closed loop control piezoelectric stack.
The series connection integral type flexible hinge matrix 1 of the present invention adopts wire cutting integral type machine-shaping.
The series connection integral type flexible hinge matrix 1 of the present invention is passed through hole 1, is connected with force transducer 12 with screw 10,
Force transducer 12 is fixed on vertical machine guide rail by trip bolt.
The force transducer 12 of the present invention is mainly used in each component for gathering main cutting force in working angles, then feedback control
Make to adjust each cutting parameter, realize the further optimization of cutting force.
The present invention will be further described to combine accompanying drawing below.
As shown in figure 1, by piezoelectric stack 1, piezoelectric stack 2 13, diamond cutter 2, capacitive displacement transducer 1,
Capacitive displacement transducer 2 11, displacement transducer holder 6, displacement transducer holder 8, displacement measurement baffle plate 1, displacement measurement
Baffle plate 2 14 is arranged on series connection integral hinge matrix 1, is then coupled series connection integral hinge matrix 1 by trip bolt
On force transducer 12, the integral installation of finishing device is matched somebody with somebody, and applies control signal to piezoelectric stack by high performance controller as follows：
Wherein A1,A2For the amplitude of piezoelectric stack drive signal, w is the frequency of piezoelectric stack drive signal,For pressure
Electricity stacks the phase angle of drive signal.
As shown in figure 3, there is certain phase contrast between two piezoelectric stack drive signals, and during driving, pressure
Electricity stacks flexible length and has differences, (a) in Fig. 3 is the original state of two piezoelectric stacks, now diamond cutter 2
Minimum point of the point of a knife in elliptical trajectory, the change in location of (b) in Fig. 3, (c) in Fig. 3, (d) in Fig. 3,
The point of a knife of diamond cutter 2 completes a complete elliptical orbit, then according to the frequency of two piezoelectric stack drive signals come
Realize preferable diamond cutter frequency of vibration.
Fig. 4 gives the present invention control system block diagram of employing, wherein mainly including：Lathe, workpiece turn round grating,
Interface board, diamond cutter, piezoelectric stack, force transducer, power amplifier, high performance controller and capacitive displacement sensing
Device.
According to Fig. 1-Fig. 4, the working method of the present invention is as follows：
1. by the two piezoelectricity vertical ellipse vibration turning devices fastening spiral shell for being suitable to vertical Excircle machining according to the present invention
Nail on the guide rail of numerically controlled lathe drives to piezoelectric stack and applies drive control signal respectively, by adjusting piezoelectric stack
The parameter (amplitude, frequency and phase angle) of drive signal, obtains diamond point of a knife elliptic ideal track, shakes so as to generate ellipse
The principal cutting movement of dynamic cutting.
2, it would be desirable to which the clamping workpiece of processing is realized by the revolution of main shaft and the motion of guide rail on the main shaft of lathe
Workpiece rotary feed campaign, gathers the transient state corner of main shaft by turning round grating.
3., by a ultraprecise capacitive displacement transducer, two piezoelectricity vertical ellipse vibration turning devices of detection are upper
The displacement of shift measurement baffle plate, that is, obtain the actual displacement of piezoelectric stack, by the data feedback for collecting in high performance controller,
Reality output displacement is corrected by compensating.
4., by a three-dimensional force transducer, reality is carried out to the power of two piezoelectricity vertical ellipse vibration turning device each component
When gather, by the data feedback for collecting in high performance controller, by adjust cutting parameter further optimize cutting force.
5. by a high performance controller, to realize to angle of eccentricity detection, the transient Displacements inspection of 2 piezoelectric stacks
Survey, the tracing control of each component values detection of cutting force and elliptical trajectory.
Claims (3)
1. a kind of two piezoelectricity vertical ellipse vibration cutting devices for being suitable to vertical Excircle machining, it is characterised in that：Piezoelectric stack is pre-
Tight screw two carries out pretension, piezoelectric stack pretension spiral shell through the hole three on series connection integral type flexible hinge matrix to piezoelectric stack two
Nail one carries out pretension, displacement measurement baffle plate one and position to piezoelectric stack one through the hole five on series connection integral type flexible hinge matrix
Shift measurement baffle plate two is arranged on the hole six and hole eight of series connection integral type flexible hinge matrix by trip bolt respectively, condenser type
Displacement transducer one and capacitive displacement transducer two are corresponded to respectively and are pressed from both sides installed in displacement transducer holder one and displacement transducer
On seat two, displacement transducer holder one and displacement transducer holder two are arranged on series connection integral type flexibility by trip bolt respectively
On the Kong Si and hole two of hinge base body, diamond cutter is arranged on series connection integral type flexible hinge matrix front end by trip bolt
Hole seven on, described series connection integral type flexible hinge matrix is by hole one, be connected with force transducer with screw.
2. a kind of two piezoelectricity vertical ellipse vibration cutting devices for being suitable to vertical Excircle machining according to claim 1, its
It is characterised by：On the series connection integral type flexible hinge matrix, two orthogonal flexible hinges adopt rectangular hinge, and
Arrange into parallelogram between four subbranches included in single hinge, form single-degree-of-freedom closed system.
3. a kind of two piezoelectricity vertical ellipse vibration cutting devices for being suitable to vertical Excircle machining according to claim 1, its
It is characterised by：Described series connection integral type flexible hinge matrix adopts wire cutting integral type machine-shaping.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106041133B (en) * | 2016-07-20 | 2017-12-12 | 长春工业大学 | A kind of universality off-resonance elliptical vibration cutting flexible apparatus of adjustable angle |
| CN106881619A (en) * | 2017-04-30 | 2017-06-23 | 长春工业大学 | A kind of vibration auxiliary rotary cutting apparatus based on acute angle board-type flexible hinge |
| CN106965029A (en) * | 2017-04-30 | 2017-07-21 | 长春工业大学 | One kind vibration auxiliary diamond cutter rotation truning fixture |
| CN107322020B (en) * | 2017-06-21 | 2019-03-08 | 山东大学 | A kind of micro-nano technology device and processing method for the secondary antifriction that rubs |
| CN108274055B (en) * | 2018-02-01 | 2019-07-09 | 南京航空航天大学 | The processing method that elliptical vibration assists micro- V-groove layered cutting |
| CN109648098B (en) * | 2019-01-15 | 2020-01-14 | 东北大学 | Ultrasonic auxiliary turning device capable of improving ultrasonic vibration dimension |
| CN109713936A (en) * | 2019-03-20 | 2019-05-03 | 杨晓峰 | Elliptical vibration piezoelectric actuator and its driving method |
| CN117066917B (en) * | 2023-10-18 | 2023-12-19 | 山东理工大学 | Combined dual-mode multi-frequency vibration auxiliary processing device |
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