CN206998400U - A kind of vibration auxiliary rotary cutting apparatus based on acute angle board-type flexible hinge - Google Patents
A kind of vibration auxiliary rotary cutting apparatus based on acute angle board-type flexible hinge Download PDFInfo
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- CN206998400U CN206998400U CN201720471844.3U CN201720471844U CN206998400U CN 206998400 U CN206998400 U CN 206998400U CN 201720471844 U CN201720471844 U CN 201720471844U CN 206998400 U CN206998400 U CN 206998400U
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- flexible hinge
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Abstract
A kind of vibration auxiliary rotary cutting apparatus based on acute angle board-type flexible hinge is the utility model is related to, belongs to ultra-precise cutting processing technique field.Piezoelectric stack one, piezoelectric stack two uses pre-loading screw one respectively, pre-loading screw two is arranged on flexible apparatus platform, capacitive displacement measures baffle plate one, capacitive displacement measurement baffle plate two is connected with trip bolt with flexible apparatus platform respectively, capacitive displacement transducer one, capacitive displacement transducer two is arranged on capacitive displacement transducer holder by trip bolt respectively, capacitive displacement transducer holder is arranged on flexible apparatus platform by trip bolt, diamond cutter is fixedly connected with flexible hinge platform by trip bolt, flexible hinge platform is connected by fixing screws with installation pedestal.Advantage is structure novelty, eliminates residual altitude during week present in elliptical vibration cutting process；The higher control accuracy of flexible apparatus can be realized.
Description
Technical field
The utility model belongs to ultra-precise cutting processing and difficult-to-machine material complexity optical element Technology for Turning Machining neck
Domain, more particularly to a kind of vibration auxiliary rotary cutting apparatus based on acute angle board-type flexible hinge.
Background technology
In recent years, the continuous development of Precision and Ultra-precision Machining technology and it has been successfully applied in many fields, such as：It is micro-
Mechatronic Systems, aerospace parts processing, biomedicine, bionics etc., different field machining accuracy and application material can
Processability, all it is traditional cutting side during the Surfaces of Unusual Shape of a kind of challenge, particularly difficult-to-machine material is processed to Ultra-precision Turning
Method can not meet the needs of application, and elliptical vibration cutting (Elliptical Vibration Cutting EVC) exactly exists
Grow up on the basis of this, and by the extensive concern of whole world experts and scholars, it is considered to be the difficulty of most development potentiality adds
One of work material processing method.
EVC methods have unique intermittent cutting and frictional force reversal characteristics, can effectively suppress in process
Cutting vibration, tool life, cutting temperature is reduced, and further improve the crudy of part.EVC devices are ground
Study carefully and proposed earliest by Shamoto professors of Japan Nagoya university et al., evoke being total to for knife bar using piezoelectric patches to knife bar both sides
Shake mode, then synthesized by single order with the motion under three rank mode, realize the elliptic motion of point of a knife, experiment shows that EVC can
The pressing characteristic of transmission vibration assisted machining is eliminated, has worldwide carried out the research of EVC devices extensively afterwards, wherein main
There are the countries such as the U.S., Japan, Singapore, Germany, South Korea, device develops into off-resonance type by resonance type, is gradually expanded by two-dimentional
Three-dimensional is opened up, the domestic research on EVC is also more, is concentrated mainly on Harbin Institute of Technology, Jilin University, Beijing Aviation boat
The colleges and universities such as its university, University Of Tianjin, Dalian University of Technology, Institutes Of Technology Of He'nan, Changchun Polytechnic Univ., except to EVC device exhibitions
It is outer to open research, EVC cutting force, cutting heat, tool wear, Cutting trajectory, process control etc. have also carried out many research.
EVC research has also suffered from technical bottleneck while gradually improving, the cutter residual altitude between adjacent track
It can not eliminate, limit the further raising of EVC machining accuracies, although this office can be alleviated by improving machining frequency
It is sex-limited, but frequency is higher, also with motion of growing nonparasitically upon another plant, causes to control difficulty to increase, therefore study a kind of both excellent with EVC cuttings
Point and can overcomes the processing method of EVC limitations imperative.
The content of the invention
The utility model provides a kind of vibration auxiliary rotary cutting apparatus based on acute angle board-type flexible hinge, so as to real
The high-precision Ultra-precision machining of existing difficult-to-machine material.
The technical solution adopted in the utility model is：Piezoelectric stack one, piezoelectric stack two are respectively with pre-loading screw one, pretension
Screw two is arranged on flexible apparatus platform, and capacitive displacement measurement baffle plate one, capacitive displacement measurement baffle plate two are respectively with tight
Gu screw is connected with flexible apparatus platform, capacitive displacement transducer one, capacitive displacement transducer two are respectively by fastening spiral shell
Nail is arranged on capacitive displacement transducer holder, and capacitive displacement transducer holder is arranged on flexible apparatus by trip bolt
On platform, diamond cutter is fixedly connected with flexible hinge platform by trip bolt, and flexible hinge platform passes through fixing screws
It is connected with installation pedestal.
Flexible apparatus platform described in the utility model is bilateral symmetry, by taking wherein side as an example, flexible hinge chain group by
Perpendicular type flexible hinge one in parallel, perpendicular type flexible hinge two, perpendicular type flexible hinge three, straight round flexible hinge, acute angle are straight
Template flexible hinge forms, wherein, perpendicular type flexible hinge three is connected with Cutting tool installation manner platform, capacitive displacement measurement apron block
Both ends are connected with perpendicular type flexible hinge one in parallel, and the parallel perpendicular type flexible hinge one is using Performance of Right-Angle Flexure Hinge, single
Arranged between four subbranches included in flexible hinge into parallelogram, form single-degree-of-freedom enclosed construction, perpendicular type is flexible
Hinge two is arranged on parallel perpendicular type flexible hinge opposite, and capacitive displacement measures flexible with acute angle board-type before apron block
Hinge connection, two hinges in the acute angle board-type flexible hinge are into 60 ° of angles, and the acute angle board-type flexible hinge opposite is also
There are two straight round flexible hinges.
The utility model advantage is structure novelty, easily fabricated, largely reduces the error that assembling is brought, in parallel straight
Angle-style flexible hinge one is directly driven by piezoelectric stack, drives acute angle board-type flexible hinge 1206 and straight round flexible hinge fortune
It is dynamic, cause this to be rotated by the aligned cutting tool of perpendicular type flexible hinge three around the stable of the center of circle, flexible hinge is flexible as guiding mechanism
Device volume is small, light weight, it is easy to accomplish the high frequency processing of flexible apparatus；Meanwhile the utility model is in piezoelectric stack driving side
Upwards by one group of piezoelectric stack by carrying out pretension along the pretension bolt of respective axis direction, pretension process is all separate, letter
It is single reliable, it is easy to accomplish；
For the utility model by the rotation of cutter, cutting point will be along knife along relatively constant variation, cutting force are rotating
During can be homogenized on last component so that total cutting force, which reduces, improves cutter life, while intends interval and revolve
Turn that a part of cutting heat can be taken away, radiated beneficial to stage property, avoid the localized hyperthermia in working angles；
During the utility model plant running, the contact point cyclically-varying of cutter and workpiece, cutter in each cycle
Cutting fluid can be brought into cutting zone when rotated, realize high-efficiency lubricating；Meanwhile by rotating device make diamond cutter around
Corner radius axle center rotates, and the circular arc that cutter participates in cutting changes with the rotation of cutter, because cutter and workpiece exist
Contacted all the time in working angles, eliminate residual altitude during week present in elliptical vibration cutting process；
The utility model device is processed using the vibrocutting of off-resonance type, and off-resonance type vibration rotary cutting apparatus is usually
Formed by piezoelectric stack driving flexible hinge, shape, size and the method for salary distribution of flexible hinge are all cut to whirling vibration
The effect cut has influenceed, and according to the flexible hinge method of salary distribution come the rotational trajectory of diamond synthesis cutter, different tracks can be with
The range of work is different；On rotational trajectory production method, by the official post diamond cutter of the driving force of piezoelectric stack around
Nose radius axle center rotates, and makes it have the spatial alternation feature for intending intermittent control shaking rotary cutting movement locus, can eliminate EVC
During it is existing week during residual altitude, cutter path is stronger for the flexibility (adaptability) of operation of curved surface, so improve crudy,
Extend cutter life and extend the scope of diamond cutter machinable material；Two in rotation flexible apparatus of the present utility model
Piezoelectric stack driving is parallel to each other, and drives independent flexible hinge respectively, and coupling is not present between each other, can realize flexible dress
Higher control accuracy is put, while the anglec of rotation can be adjusted by the parameter of piezoelectric stack drive signal.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the upper shaft side figure of the utility model flexible apparatus platform；
Fig. 3 is the upper shaft side figure of the utility model flexible apparatus platform；
Fig. 4 is the utility model directly round flexible hinge, acute angle board-type flexible hinge partial structural diagram；
Fig. 5 is utility model kinematic sketch.
Embodiment
Piezoelectric stack 1, piezoelectric stack 28 are arranged on flexible apparatus with pre-loading screw 1, pre-loading screw 27 respectively
On platform 12, capacitive displacement measurement baffle plate 1, capacitive displacement measurement baffle plate 2 13 are filled with trip bolt 4 with flexible respectively
Horizontalization platform 12 is connected, and capacitive displacement transducer 1, capacitive displacement transducer 2 11 are arranged on by trip bolt 4 respectively
On capacitive displacement transducer holder 9, capacitive displacement transducer holder 9 is arranged on flexible apparatus platform by trip bolt 4
On 12, diamond cutter 1 is fixedly connected with flexible hinge platform 12 by trip bolt, and flexible hinge platform 12 passes through fixed spiral shell
Nail 10 is connected with installation pedestal.
Flexible apparatus platform 12 described in the utility model belongs to bilateral symmetry, by taking wherein side as an example, flexible hinge
Group is straight round by perpendicular type flexible hinge 1 in parallel, perpendicular type flexible hinge 2 1202, perpendicular type flexible hinge 3 1204
Flexible hinge 1205, acute angle board-type flexible hinge 1206 form, wherein, perpendicular type flexible hinge 3 1204 is put down with Cutting tool installation manner
Platform 1203 is connected, and the capacitive displacement measurement both ends of apron block 1207 are connected with perpendicular type flexible hinge 1,201 1 in parallel, the parallel connection
Into parallel between four subbranches included in the use of formula perpendicular type flexible hinge 1 Performance of Right-Angle Flexure Hinge, single flexible hinge
Quadrangular array, forms single-degree-of-freedom enclosed construction, and perpendicular type flexible hinge 2 1202 is arranged on parallel perpendicular type flexible hinge
The opposite of chain 1201, capacitive displacement measurement apron block 1207 are above connected with acute angle board-type flexible hinge 1206, and the acute angle is straight
For two hinges in template flexible hinge 1206 into 60 ° of angles, the opposite of acute angle board-type flexible hinge 1206 also has two directly
Round flexible hinge 1205；
Perpendicular type flexible hinge 1 in parallel drives acute angle board-type flexible hinge in the case where piezoelectric stack mutually drives
1206, round flexible hinge 1205 is driven by acute angle type straight panel flexible hinge 1206 again, causes to drive perpendicular type flexible hinge three
1204 and the rotation of Cutting tool installation manner platform 1203, wherein straight round flexible hinge 1205 is used for the stability of aligned cutting tool rotation,
Two hinges ensure that Cutting tool installation manner platform side stability under loading, and acute angle into 60 ° of angles in acute angle board-type flexible hinge 1206
For the both sides of board-type flexible hinge 1206 into symmetrical structure, there is the realization that corresponding elasticity ensure that rotary motion on both sides.
Operation principle is as follows：
(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 stack
28 apply control signal respectively, by adjusting piezoelectric stack 1, parameter (amplitude, the frequency of the signal that piezoelectric stack 28 applies
And phase angle), piezoelectric stack 1, piezoelectric stack 28 is in one 1201 times linear motions of perpendicular type flexible hinge in parallel, by right
The bi-directional symmetrical of acute angle board-type flexible hinge 1206 is moved, and both ends driving force symmetrically changes, in the straight round He of flexible hinge 1205
Under the positioning action of right angle flexible hinge 3 1204, produce the point of a knife of diamond cutter 1 and rotated around cutter cutter location, produce reason
The rotational trajectory thought, generate the principal cutting movement of rotary cutting.
As shown in figure 1, designed by the utility model diamond vibration auxiliary rotation truning fixture employ two it is parallel
The piezoelectric stack of placement is driven, and the drive signal of piezoelectric stack needs to realize preferably rotation turning by model conversion
Movement locus, regard the cutter location of diamond cutter as point O0。
As shown in figure 1, the drive signal of piezoelectric stack 1 and piezoelectric stack 28 is as follows：
Wherein, A1,A2The amplitude of respectively two piezoelectric stack drive signals, t are time variables, and ω drives for piezoelectric stack
The frequency of dynamic signal, φ1,φ2For the phase difference of piezoelectric stack drive signal, turn by moving with the space coordinates of tool rest parameter
Change；
Define XYZ coordinate system, the wherein origin of coordinates be the above-mentioned tool nose circular arc center of circle, as shown in figure 5, Z-direction and
Piezoelectric stack driving direction is consistent, Y direction perpendicular to cutter rake face and direction it is outside, can according to right-handed Cartesian coordinate
To determine X-direction；
If knife is O along circular arc initial point0, O1For piezoelectric stack drive device when point of a knife be moved along distance, T tool motions
When cutter location, O2For point of a knife θ is rotated around cutter location T1Position, O3For point of a knife θ is rotated around cutter location T1+θ2Position, P0Pressure
Electricity stacks the position of cutter location when not stressing, piezoelectric ceramics input voltage, elapsed-time standards t, and point of a knife moves to O3,θ1For O1TO2It
Between angle, θ2For O2TO3Between angle, wherein, O0=(x0,y0,z0),
O1=(x1,y1,y1), O2=(x2,y2,z2), O3=(x3,y3,z3)；Due to：
It can be released according to relation between vector
So according to geometrical relationship
l0For piezoelectric stack not applying power when cutter location P0To point of a knife O0Distance, l1For piezoelectric stack not applying power when knife
Site P0To point of a knife O during piezoelectric stack applying power1Distance, l2For piezoelectric stack not applying power when cutter location P0Transported apart from point of a knife
Move O2When distance, l3For piezoelectric stack not applying power when cutter location P0O is moved to apart from point of a knife3When distance.
Due to θ1,θ2Value it is very small, therefore：
It is by (4) substitution (3) cutting tool path：
Wherein：
(6) are substituted into (7) rotational trajectory equation expression formula that finally point of a knife is formed is：
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
All any modification, equivalent and improvement done within new spirit and principle etc., should be included in guarantor of the present utility model
Within the scope of shield.
Claims (2)
- A kind of 1. vibration auxiliary rotary cutting apparatus based on acute angle board-type flexible hinge, it is characterised in that：Piezoelectric stack one, Piezoelectric stack two is arranged on flexible apparatus platform with pre-loading screw one, pre-loading screw two respectively, capacitive displacement measurement baffle plate First, capacitive displacement measurement baffle plate two is connected with trip bolt with flexible apparatus platform respectively, capacitive displacement transducer one, electricity Appearance formula displacement transducer two is arranged on capacitive displacement transducer holder by trip bolt respectively, capacitive displacement transducer Holder is arranged on flexible apparatus platform by trip bolt, and diamond cutter is fixed with flexible hinge platform by trip bolt Connection, flexible hinge platform are connected by fixing screws with installation pedestal.
- 2. a kind of vibration auxiliary rotary cutting apparatus based on acute angle board-type flexible hinge according to claim 1, its It is characterised by：The flexible apparatus platform is bilateral symmetry, and by taking wherein side as an example, flexible hinge chain group is by parallel right angle Type flexible hinge one, perpendicular type flexible hinge two, perpendicular type flexible hinge three, straight round flexible hinge, acute angle board-type are flexible Hinge forms, wherein, perpendicular type flexible hinge three be connected with Cutting tool installation manner platform, and capacitive displacement measures apron block both ends and simultaneously Connection perpendicular type flexible hinge one connects, and the parallel perpendicular type flexible hinge one is using Performance of Right-Angle Flexure Hinge, single flexible hinge In arranged into parallelogram between four subbranches including, form single-degree-of-freedom enclosed construction, perpendicular type flexible hinge two is pacified Mounted in the parallel opposite of perpendicular type flexible hinge one, connect before capacitive displacement measurement apron block with acute angle board-type flexible hinge Connect, two hinges in the acute angle board-type flexible hinge also have two into 60 ° of angles, the acute angle board-type flexible hinge opposite Straight round flexible hinge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720471844.3U CN206998400U (en) | 2017-04-30 | 2017-04-30 | A kind of vibration auxiliary rotary cutting apparatus based on acute angle board-type flexible hinge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720471844.3U CN206998400U (en) | 2017-04-30 | 2017-04-30 | A kind of vibration auxiliary rotary cutting apparatus based on acute angle board-type flexible hinge |
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| CN206998400U true CN206998400U (en) | 2018-02-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111730075A (en) * | 2020-05-29 | 2020-10-02 | 南京航空航天大学 | Variable-dimension vibration auxiliary turning device and track generation method thereof |
-
2017
- 2017-04-30 CN CN201720471844.3U patent/CN206998400U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111730075A (en) * | 2020-05-29 | 2020-10-02 | 南京航空航天大学 | Variable-dimension vibration auxiliary turning device and track generation method thereof |
| CN111730075B (en) * | 2020-05-29 | 2021-07-09 | 南京航空航天大学 | Variable-dimension vibration auxiliary turning device and track generation method thereof |
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