CN206998401U - One kind vibration auxiliary diamond cutter rotation truning fixture - Google Patents
One kind vibration auxiliary diamond cutter rotation truning fixture Download PDFInfo
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- CN206998401U CN206998401U CN201720471846.2U CN201720471846U CN206998401U CN 206998401 U CN206998401 U CN 206998401U CN 201720471846 U CN201720471846 U CN 201720471846U CN 206998401 U CN206998401 U CN 206998401U
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Abstract
A kind of vibration auxiliary diamond cutter rotation truning fixture is the utility model is related to, belongs to ultra precision cutting and difficult-to-machine material complexity optical effect correction technical field.Piezoelectric stack is arranged on flexible apparatus platform with piezoelectric stack pre-loading screw respectively, capacitive displacement measurement baffle plate is connected with screw with flexible apparatus platform respectively, capacitive displacement transducer is separately mounted on capacitive displacement transducer holder, capacitive displacement transducer holder is arranged on flexible apparatus platform by screw, diamond cutter is connected by screw on flexible apparatus platform, flexible apparatus platform is fixedly connected by screw with force snesor, and upper cover plate is fixedly connected with flexible apparatus platform by marking closely.Advantage is structure novelty, easily fabricated, largely reduces the error that assembling is brought, improves cutter life, can realize the higher control accuracy of flexible apparatus, while the anglec of rotation can be adjusted by the parameter of piezoelectric stack drive signal.
Description
Technical field
The utility model belongs to ultra precision cutting and difficult-to-machine material complexity optical effect correction technical field, particularly relates to
And a kind of vibration auxiliary diamond cutter vibration rotation truning fixture and its implementation method.
Background technology
With the rapid development of science and technology, there is the accurate and ultraprecise part of complex geometry feature not only in military, boat
It is used widely in empty aerospace industry, and also has in increasing civilian industry and increasingly extensive there should be demand.
Diamond Cutting be it is a kind of create into complex geometry is accurate or the important processing method of ultraprecise part, but the machinable material of diamond
Material scope is but extremely restricted, for hard brittle materials such as the ferrous materials such as hardened steel and carborundum, its machinability compared with
Difference, serious tool wear is often led in working angles, finished surface deteriorates and machining accuracy reduces.In order to extend diamond
The scope of cutter machinable material, proposes some advanced cutting process in recent years, for example, vibrocutting, the cutting of carbon saturation and
Sub-zero machining etc..Research so far shows：Vibrocutting is a kind of most promising cutting process, is cut with reduction
Power is cut, cutting heat is reduced, suppresses tool wear, improves many advantages, such as machined surface quality.
Vibrocutting method is realized by adding small size dither on the cutting tool of routine.Vibrocutting at present
Development experience three phases；First, one-dimensional vibrocutting in the cutting for being successfully applied in difficult-to-machine material in 1966 and by
The extensive concern of whole world scholar；Second, Two dimensional cutting was taught in 1993 by this English of the society of Japan Nagoya university two
Et al. propose first；3rd, 3D EVC are developed on the basis of EVC, the advantages of absorption possessed by EVC, but with
Elliptical vibration cutting initially proposes vibrocutting for the vibrocutting of main body from pure professor youth in the river bend portion of Japanese Utsunomiya university
Theory is to the three-dimensional elliptical vibrocutting of current Japan Nagoya university Shamoto development, and many scholars are to vibrocutting progress
Beneficial explore and study, the at present external research to vibrocutting problem mainly have Japanese Kobe University and Nagoya big
Learn, German Bremen universities, North Carolina universities of the U.S. and Northwest University, NUS etc.；The country shakes
It is several that the research of dynamic problem of cutting is concentrated mainly on Jilin University, BJ University of Aeronautics ＆ Astronautics, The Hong Kong Polytechnic University, Xiamen University etc.
Colleges and universities of institute.
Research based on vibration cutting device mainly divides piezoelectric patches transducer ultrasonic oscillating mode device and Piezoelectric Driving flexible
Hinge off-resonance type device.The former belongs to resonance type device, and it is mainly characterized by can realizing during processing higher
Frequency, but resonance type device there is also in some the defects of, such as need according to device consolidating in itself in process
There is frequency to realize that resonance carries out machining, so, the frequency of processing can not just adjust, while between each first order mode easily
Coupling is produced, control difficulty is big；The latter belongs to off-resonance type device, and it is mainly characterized by can be with active accommodation diamond point of a knife
The parameter such as motion frequency and amplitude, stronger adaptability is machined with for different materials and surface.So in the design of device
Aspect, off-resonance type device are gradually paid close attention to by researcher.In vibrocutting application, interval during cutting be present
Cutting characteristic and frictional force reversal characteristics, largely extend cutter life, reduce cutting force, are most potential at present
A kind of machining mode.It is current or there are problems that, and first：Vibrate assisted machining process in there is
Residual altitude during week, second：Oscillation mark between vibration assisted machining adjacent periods can not eliminate, and limit vibration assisted machining
Further raising of crudy etc..
The content of the invention
The utility model provides a kind of vibration auxiliary diamond cutter rotation truning fixture, so as to realize difficult-to-machine material height
The Ultra-precision machining of precision.
The utility model adopts the technical scheme that：Piezoelectric stack one, piezoelectric stack two use piezoelectric stack pretension spiral shell respectively
Nail one, piezoelectric stack pre-loading screw two are arranged on flexible apparatus platform, capacitive displacement measurement baffle plate one and capacitive displacement
Measurement baffle plate two is connected with screw with flexible apparatus platform respectively, capacitive displacement transducer one, capacitive displacement transducer two
It is separately mounted to capacitive displacement transducer holder one, on capacitive displacement transducer holder two, capacitive displacement transducer folder
Seat one, capacitive displacement transducer holder two are arranged on flexible apparatus platform by screw, and diamond cutter is connected by screw
It is connected on flexible apparatus platform, flexible apparatus platform is fixedly connected by screw with force snesor, and upper cover plate is put down with flexible apparatus
Platform is fixedly connected by marking closely.
The structure of flexible apparatus platform described in the utility model is：Symmetrical distribution, its left side structure are flexible hinges
Chain is by R type flexible hinges, Z-type flexible hinge, perpendicular type parallel connection pretension flexible hinge, perpendicular type parallel connection pretension flexible hinge chain group
Into perpendicular type pretension flexible hinge is above and below the front end of piezoelectric stack pre-loading screw one, the capacitive displacement measurement mounting seat of baffle plate one
There is perpendicular type parallel connection pretension flexible hinge, there are Z-type flexible hinge, tool fitting peace in perpendicular type parallel connection pretension flexible hinge front end
There are R type flexible hinges before Z-type flexible hinge and between tool fitting；
Contain three subbranches in the single Z-type flexible hinge of Z-type flexible hinge, between single Z-type hinge two-by-two
It is mutually communicated into parallelogram, forms two-freedom degree closed system；
Arranged between four subbranches included in the Performance of Right-Angle Flexure Hinge single flexible hinge into parallelogram, also shape
Into single-degree-of-freedom closed system.
The utility model advantage is structure novelty, easily fabricated, largely reduces the error that assembling is brought, and two is in parallel
Perpendicular type flexible hinge is directly driven by piezoelectric stack one, piezoelectric stack two, and flexible hinge is as guiding mechanism, flexible apparatus body
Small, the light weight of product, it is easy to accomplish the high frequency processing of flexible apparatus, meanwhile, using off-resonance type device, for different materials and table
Face is machined with stronger adaptability；Diamond cutter point of a knife is made around tool arc center reciprocating rotary, knife by rotating device
The circular arc that tool participates in cutting changes with the rotation of cutter, because cutter contacts in working angles with workpiece all the time, elimination
Residual altitude during week present in elliptical vibration cutting process, workpiece processing quality is effectively raised, extend knife
Have the life-span and extend the scope of diamond cutter cutting material；For the utility model by the rotation of cutter, cutting point will be along
Knife reduces the cutting force in working angles, improves cutter life, simultaneously for a certain cutting point along relatively constant variation
Cutting time become very short, and now temperature rise will significantly reduce；The utility model cutter can be in its rotation
When lubricate well, lubricant can penetrate readily through cutter and workpiece contact zone, while one group of piezoelectric stack of Z-direction, by edge
The pretension bolt of respective axis direction carries out pretension, and pretension process is all separate, simple and reliable, it is easy to accomplish；This practicality is new
Type uses Z-type flexible hinge, and Z-type flexible hinge advantage is that structure is novel, flexible, four Z-type unit flexible hinge centers pair
Claim to be distributed, the precision of easily controllable microbit shifting movement, the rotational trajectory in its easily controllable R type flexible hinges space；This practicality
Two piezoelectric stack drivings are parallel to each other in new rotation flexible apparatus, drive independent flexible hinge respectively, between each other
In the absence of coupling, the higher control accuracy of flexible apparatus can be realized, while the anglec of rotation can be by piezoelectric stack drive signal
Parameter adjust.
Brief description of the drawings
Fig. 1 is positive structure schematic of the present utility model；
Fig. 2 is structural representation below of the present utility model；
Fig. 3 is the front isometric view of the utility model flexible apparatus platform；
Fig. 4 is the rear isometric view of the utility model flexible apparatus platform；
Fig. 5 the utility model cutterhead trace generator figures.
Embodiment
Piezoelectric stack 1, piezoelectric stack 2 13 are respectively with piezoelectric stack pre-loading screw 1, piezoelectric stack pre-loading screw two
11 are arranged on flexible apparatus platform 2, and capacitive displacement measurement baffle plate 1 and capacitive displacement measurement baffle plate 2 15 are used respectively
Screw is connected with flexible apparatus platform 2, and capacitive displacement transducer 1, capacitive displacement transducer 2 14 are separately mounted to electricity
On appearance formula displacement transducer holder 1, capacitive displacement transducer holder 2 12, capacitive displacement transducer holder 1, electricity
Appearance formula displacement transducer holder 2 12 is arranged on flexible apparatus platform 2 by screw, and diamond cutter 1 is connected by screw
On flexible apparatus platform 2, flexible apparatus platform 2 is fixedly connected by screw 5 with force snesor 7, upper cover plate 9 and flexible apparatus
Platform 2 is fixedly connected by marking closely.
The structure of flexible apparatus platform described in the utility model is：Symmetrical distribution, its left side structure are flexible hinges
Chain is by R types flexible hinge 203, and Z-type flexible hinge 201, perpendicular type parallel connection pretension flexible hinge 206, perpendicular type parallel connection pretension is soft
Property hinge 204 form, perpendicular type pretension flexible hinge 206 is in the front end of piezoelectric stack pre-loading screw 1, capacitive displacement measurement gear
The mounting seat of plate one has perpendicular type parallel connection pretension flexible hinge 204 about 205, there is Z the front end of perpendicular type parallel connection pretension flexible hinge 204
Type flexible hinge 201, tool fitting 202 are arranged on before Z-type flexible hinge 201 and have R types flexible between tool fitting 202
Hinge 203；
Three subbranches are contained in the single Z-type flexible hinge of Z-type flexible hinge 201, two between single Z-type hinge
Twenty percent parallelogram is mutually communicated, and forms two-freedom degree closed system；
Arranged between four subbranches included in the single flexible hinge of Performance of Right-Angle Flexure Hinge 204 into parallelogram,
Also single-degree-of-freedom closed system is formed.
The perpendicular type pretension flexible hinge 206 realizes piezoelectric stack one in the presence of piezoelectric stack pre-loading screw 1
6 pretension, and with making, piezoelectric stack stablizes fixation to perpendicular type parallel connection pretension flexible hinge 206 and uniform force acts on；Directly
Angle-style parallel connection pretension flexible hinge 204 acts on lower motion by piezoelectric stack, makes piezoelectric stack driving Z-type flexible hinge 201 along Z
Direction of principal axis output linearity displacement, when when both ends, driving force symmetrically changes, Z-type flexible hinge 201 can produce bi-directional symmetrical；R types are soft
Property hinge 203 realizes the positioning of diamond cutter cutter location, and R types flexible hinge 203 drives in two groups of parallel connection Z-type flexible hinges
Under, the difference of caused both ends driving force, cause diamond cutter cutter location that certain torsion occurs around R types flexible hinge and realize
The rotation of point of a knife.
Operation principle：
(1) by clamping workpiece on the main shaft of lathe, the transient state angle of main shaft is gathered by turning round grating, passes through main shaft
Turn round to realize workpiece rotary feed campaign；
(2) the utility model device is arranged on the guide rail of numerically controlled lathe, to two piezoelectric stacks 1, piezoelectric stacks
2 13 apply control signal respectively, by the parameter (amplitude, the frequency that adjust piezoelectric stack 1, the signal that piezoelectric stack 2 13 applies
Rate and phase angle), piezoelectric stack 1, piezoelectric stack 2 13 move along a straight line for 204 times in perpendicular type flexible hinge, by driving Z
The bi-directional symmetrical of type flexible hinge 201 motion both ends driving force symmetrically changes, and diamond cutter point of a knife is produced around R type flexible hinges
Chain 203 moves, and produces preferable rotational trajectory, generates the principal cutting movement of rotary cutting；
It is driven as shown in figure 1, the utility model employs two piezoelectric stacks being placed in parallel, the drive of piezoelectric stack
Dynamic signal needs to realize preferably rotation turning movement locus by model conversion, and the cutter location of diamond cutter is regarded as a little
T；
The drive signal of two piezoelectric stacks is as follows：
Wherein, A1The amplitude of respectively each piezoelectric stack drive signal, t are time variables, and ω drives for piezoelectric stack
The frequency of signal, φ1,φ2For the phase difference of piezoelectric stack drive signal；
Because parallel-plate prismatic pair employs symmetrical structure, the linearity of its output displacement is preferable, resists non-functional direction
The ability that upper outer load influences is stronger, and stable movement, i.e. overall precision are higher, guarantee output accuracy, and cutter straight-line feed amount is strict
Equal to the output displacement of piezoelectric stack, suffered external force and the relation of deformation in two groups of online regimes of elastic deformation of parallel-plate prismatic pair
It is as follows：
F=KJX (2)
In formula：F=KJX be parallel-plate prismatic pair rigidity, wherein e=t/a；
Because straight line driving mechanism output displacement Δ X is equal to the total variation delta L of piezoelectric stack length:
Wherein, the rigidity of single parallel-plate prismatic pair is km, piezoelectric stack original length is L, when piezoelectric stack is without outer load
Nominal output displacement be Δ L0If initial pretightning force is F1, then flexible hinge deflection under effect is X1；Piezoelectric stack is in F1
By compression Δ L under effect1, after voltage is applied to piezoelectric stack, according to piezoelectric stack power producing characteristics, piezoelectric stack extends and gone out
The end-state of power is：Flexible hinge stress F2, flexible hinge deflection is X2；Piezoelectric stack pressure is F2, piezoelectric stack
Δ L is extended compared with original length2；
From formula, piezoelectric stack and flexible hinge form linear system under small deformation state, flexible hinge it is defeated
Go out that displacement is unrelated with pretightning force size, it is relevant with the rigidity of flexible hinge, for different flexible hinges, stiffness KJValue get over
Small, output displacement Δ X is bigger；
Swing angle is sought using Z-type flexible guiding unit flexible hinge micro-displacement mechanism specificity analysis, preferable displacement is
The target of pursuit, due to each hinge elastic deformation, the axial deformation of node can cause displacement loss, be less than its actual displacement
Theoretical displacement, this to lose the load capacity that also reflects the mechanism, in Z-type flexible hinge displacement mechanism, it is by one group pair
Parallel type flexible hinge structure is claimed to be formed as guide support, single Z unit by 3 board-type flexible hinges in tandem-in-space,
In the course of work, the motion feature of the mechanism is：Under piezoelectric stack 1 and the joint driving of piezoelectric stack 2 13, R type flexible hinges
Chain limitation diamond cutter is fed along Z axis, because piezoelectric stack 1 and the driving force of piezoelectric stack 2 13 are inconsistent, therefore will be lured into
Moving component driving diamond cutter rotates around machine spindle, symmetrical due to mechanism it is now assumed that the mechanism flexibility hinge is rigid body
Property, only analyze its relation of displacement and angle in the presence of piezoelectric stack driving force to carrying out calculating on the left of mechanism；Utilize three
Angle function relation can calculate the anglec of rotation δ on the right side of point of a knife：
Formula (4) is substituted into (5)
Wherein, a is lever AB length, and α is AB and AC angles, and AB and BO angles δ is the anglec of rotation on the right side of point of a knife, so, when
For point of a knife using central axis as line of demarcation, the scope of the point of a knife anglec of rotation is (δ ,-δ).
Claims (4)
1. one kind vibration auxiliary diamond cutter rotation truning fixture, it is characterised in that：Piezoelectric stack one, piezoelectric stack two are distinguished
It is arranged on piezoelectric stack pre-loading screw one, piezoelectric stack pre-loading screw two on flexible apparatus platform, capacitive displacement measurement gear
Plate one and capacitive displacement measurement baffle plate two are connected with screw with flexible apparatus platform respectively, capacitive displacement transducer one, electricity
Appearance formula displacement transducer two is separately mounted to capacitive displacement transducer holder one, on capacitive displacement transducer holder two, electricity
Appearance formula displacement transducer holder one, capacitive displacement transducer holder two are arranged on flexible apparatus platform by screw, Buddha's warrior attendant
Stone cutter is connected by screw on flexible apparatus platform, and flexible apparatus platform is fixedly connected by screw with force snesor, on
Cover plate is fixedly connected with flexible apparatus platform by marking closely.
A kind of 2. vibration auxiliary diamond cutter rotation truning fixture according to claim 1, it is characterised in that：It is described soft
The structure of property apparatus platform is：Symmetrical distribution, its left side structure are that flexible hinge is flexible by R type flexible hinges, Z-type
Hinge, perpendicular type parallel connection pretension flexible hinge, perpendicular type parallel connection pretension flexible hinge composition, perpendicular type pretension flexible hinge are being pressed
Electricity stacks the front end of pre-loading screw one, and capacitive displacement measurement baffle plate one mounting seat has perpendicular type parallel connection pretension flexible hinge up and down,
There is Z-type flexible hinge perpendicular type parallel connection pretension flexible hinge front end, and tool fitting is arranged on before Z-type flexible hinge and cutter
There are R type flexible hinges between mounting seat.
A kind of 3. vibration auxiliary diamond cutter rotation truning fixture according to claim 2, it is characterised in that：The Z
Contain three subbranches in the single Z-type flexible hinge of type flexible hinge, two twenty percent parallelogram phases between single Z-type hinge
Mutually insertion, form two-freedom closed system.
A kind of 4. vibration auxiliary diamond cutter rotation truning fixture according to claim 2, it is characterised in that：It is described straight
Arrange, also formed single into parallelogram between four subbranches included in angle-style parallel connection pretension flexible hinge single flexible hinge
Free degree closed system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720471846.2U CN206998401U (en) | 2017-04-30 | 2017-04-30 | One kind vibration auxiliary diamond cutter rotation truning fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720471846.2U CN206998401U (en) | 2017-04-30 | 2017-04-30 | One kind vibration auxiliary diamond cutter rotation truning fixture |
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| Publication Number | Publication Date |
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| CN206998401U true CN206998401U (en) | 2018-02-13 |
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| CN201720471846.2U Active CN206998401U (en) | 2017-04-30 | 2017-04-30 | One kind vibration auxiliary diamond cutter rotation truning fixture |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106965029A (en) * | 2017-04-30 | 2017-07-21 | 长春工业大学 | One kind vibration auxiliary diamond cutter rotation truning fixture |
| 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 |
-
2017
- 2017-04-30 CN CN201720471846.2U patent/CN206998401U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106965029A (en) * | 2017-04-30 | 2017-07-21 | 长春工业大学 | One kind vibration auxiliary diamond cutter rotation truning fixture |
| 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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