CN106868570B - A kind of metal surface modifying device - Google Patents
A kind of metal surface modifying device Download PDFInfo
- Publication number
- CN106868570B CN106868570B CN201710277868.XA CN201710277868A CN106868570B CN 106868570 B CN106868570 B CN 106868570B CN 201710277868 A CN201710277868 A CN 201710277868A CN 106868570 B CN106868570 B CN 106868570B
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- China
- Prior art keywords
- workpiece
- electrophoresis
- particle
- metal surface
- surface modifying
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Classifications
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/22—Servicing or operating apparatus or multistep processes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D15/00—Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
Abstract
The invention discloses a kind of metal surface modifying devices, comprising: for providing the particle solution mixture circulatory system of nanoparticles solution to workpiece；For fixing workpiece and driving the rotating platform of workpiece rotation；Electrophoresis system, for making the particle in the nanoparticles solution in particle solution mixture circulatory system deposit to workpiece surface with electrophoretic effect；Temperature control device, temperature control device is for changing workpiece surface temperature；Metal surface modifying device provided by the invention can carry out the compound metal surface hydrophobe modification of one or more kinds of different process, it can use natural sediment method, spin-coating method or electrophoretic deposition auxiliary micro-nano particle, it is surface-treated on the irregular metals such as arbitrary plane, curved surface, boss, groove surface, metal surface is set to obtain orderly particle alignment, it is modified to carry out surface, metal surface modifying device provided by the present invention it is widely applicable, modification efficiency is high and easy to use.
Description
Technical field
The present invention relates to material applied technical fields, more specifically to a kind of metal surface modifying device.
Background technique
The high speed development of modern science and technology, to the increasingly raising that metal material surface characteristics require, to process for treating surface and
Technique has new development and expansion, is more popular to the surface modification that surface of workpiece carries out the biomimetic features such as hydrophobe
Sufacing.
There are thermal sintering method, nickel salt thermal decomposition method etc. to relatively conventional in the method for material surface modifying in the prior art,
However, there may be following technical problems in these methods: needing to carry out high-temperature process, higher cost, and impregnating
Modified material attachment may be uneven in journey, is easy to cause processing carbon material surface hydrophilic property uneven.Nickel salt thermal decomposition method
It is not suitable for lower melting-point basis material, is only applicable to the coctostable substances such as ceramics, glass, carbonic acid silicon.So in the prior art
Modified technique and device do not have general applicability usually.
It is that current those skilled in the art urgently solve in conclusion how to provide a kind of reforming apparatus that applicability is wider
Certainly the problem of.
Summary of the invention
In view of this, the metal surface modifying device can the object of the present invention is to provide a kind of metal surface modifying device
To carry out a plurality of types of modifications, it is easy to use, relevance grade is higher.
To achieve the goals above, the invention provides the following technical scheme:
A kind of metal surface modifying device, comprising:
For providing the particle solution mixture circulatory system of nanoparticles solution to workpiece；
For fixing workpiece and driving the rotating platform of the workpiece rotation；
Electrophoresis system, for being made in the nanoparticles solution in the particle solution mixture circulatory system with electrophoretic effect
Particle deposits to workpiece surface；
Temperature control device, the temperature control device is for changing the workpiece surface temperature.
Preferably, the particle solution mixture circulatory system includes:
Particle solution mixing vessel, the particle solution mixing vessel are equipped with to the workpiece and provide nanoparticles solution
Suction tube and attraction pipe clamp, the suction tube are used to the nanoparticles solution being attracted to workpiece surface；
One or more of vibration device, magnetic stirring apparatus, suspension suction device and solution circulating device.
Preferably, the electrophoresis system includes:
For connecting the electrophoresis auxiliary cathode fixture of the electrophoresis auxiliary cathode, the electrophoresis auxiliary cathode fixture is equipped with
Electrophoresis auxiliary cathode, the electrophoresis auxiliary cathode fixture of the electrophoresis auxiliary cathode are connected to machine tool chief axis, and the machine tool chief axis is used
In the control electrophoresis auxiliary cathode at a distance from the workpiece；
Electrophoresis auxiliary system, the output end of the electrophoresis auxiliary system are separately connected the electrophoresis auxiliary cathode and the work
Part.
Preferably, the rotating platform is arranged in the micro- three-dimensional movement platform for being able to carry out three-dimensional movement, described
Micro- three-dimensional movement platform is corresponding with the machine tool chief axis vertical position.
It preferably, further include being covered for being covered in the part of the workpiece surface, with the activity for realizing minor insulation processing
Film, the activity exposure mask are the movable exposure mask of insulation.
Preferably, the temperature control device includes vacuum control module or auxiliary Gas Control Module.
Preferably, the supplementary controlled system of the electrophoresis system, the rotating platform and the particle solution mixing circulation
System is all connected with integrated control cabinet.
Preferably, the supplementary controlled system is integrated on lathe.
It preferably, further include for being detected to the distribution of particles situation under workpiece surface deposition and molten condition
CCD Online Video detection system.
Metal surface modifying device provided by the invention can carry out the compound metal watch of one or more kinds of different process
Face hydrophobe modification can use natural sediment method, spin-coating method or electrophoretic deposition auxiliary micro-nano particle, arbitrarily flat
The irregular metals such as face, curved surface, boss, groove surface is surface-treated, and metal surface is made to obtain orderly particle alignment, into
Row surface is modified, can also change workpiece surface temperature by heating equipment, realize enhancing micro-nano modified particles and workpiece surface
Binding force.Metal surface modifying device provided by the present invention it is widely applicable, modification efficiency is high and easy to use.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of schematic diagram of metal surface modifying device provided by the present invention.
In Fig. 1:
1 is workbench, and 2 be particle solution mixture circulatory system, and 3 be CCD Online Video detection system, and 4 be machine tool chief axis,
5 be electrophoresis auxiliary cathode fixture, and 6 be workpiece, and 7 be processing groove, and 8 be work piece holder, and 9 be movable exposure mask and its control system, 10
For Rotable Control System, 11 be micro- three-dimensional movement platform, and 12 be electrophoresis auxiliary system, and 13 be vacuum and temperature control system, 14
For integrated control cabinet.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Core of the invention is to provide a kind of metal surface modifying device, which can carry out a variety of
The modification of type is easy to use, and relevance grade is higher.
Referring to FIG. 1, Fig. 1 is a kind of schematic diagram of metal surface modifying device provided by the present invention.
A kind of metal surface modifying device provided by the present invention, in structure include particle solution mixture circulatory system,
Rotating platform, electrophoresis system and temperature control device.
Wherein, particle solution mixture circulatory system is used to provide nanoparticles solution, hereinafter referred to as solution, particle to workpiece
Solution mixture circulatory system deposits to workpiece to the nano-scale particle in solution for realizing natural sediment method；Rotating platform is used for
Fixed workpiece simultaneously drives workpiece rotation, and workpiece of the particle solution mixture circulatory system into rotation provides nanoparticles solution, from
And realize that spin-coating method deposits, that is to say, that rotating platform cooperates particle solution mixture circulatory system for realizing spin-coating method to molten
Nano-scale particle in liquid deposits to workpiece；Electrophoresis system is used to make receiving in particle solution mixture circulatory system with electrophoretic effect
For rice grain liquid deposition to workpiece surface, the electrophoretic effect of electrophoresis system enables to the deposition velocity in solution to accelerate, deposit
Efficiency increase, in addition, due to electrophoretic deposition technique have it is easy to control, to particle type and particle surface state without particular/special requirement
The advantages that, it is possible on the irregular metals such as arbitrary plane, curved surface, boss, groove surface, carry out mixing micro-nano particle migration
Variety classes particle is migrated and adsorbed with absorption or gradation.It should be noted that the effect of electrophoresis is traction and acceleration ultra micro
The deposition of particle.Above-mentioned temperature control device is for changing workpiece surface temperature, to realize that workpiece surface particle fusion self assembly is close and distant
Water is modified.
Optionally, above-mentioned particle solution mixture circulatory system, rotating platform, electrophoresis system and temperature control device can be with collection
It is connected at control cabinet 14, the integrated control so as to integrated control cabinet 14 to above-mentioned apparatus.
Metal surface modifying device provided by the invention can carry out the compound metal watch of one or more kinds of different process
Face hydrophobe modification can use natural sediment method, spin-coating method or electrophoretic deposition aided nano particle, arbitrarily flat
The irregular metals such as face, curved surface, boss, groove surface is surface-treated, and metal surface is made to obtain orderly particle alignment, into
Row surface is modified, can also change workpiece surface temperature by heating equipment, realizing enhances nano level modified particle and 6 table of workpiece
Face binding force.
On the basis of above-described embodiment, above-mentioned particle solution mixture circulatory system include particle solution mixing vessel with
And one or more of vibration device, magnetic stirring apparatus, suspension suction device and solution circulating device.Wherein, particle
Solution mixing vessel, which is equipped with, to be provided the suction tube of nanoparticles solution to workpiece and attracts pipe clamp, and suction tube is used for nanometer
Grain solution is attracted to workpiece surface.
On the basis of above-described embodiment, in order to realize above-mentioned electrophoretic action, electrophoresis system specifically includes electrophoresis auxiliary
Cathode and electrophoresis auxiliary system.Wherein, electrophoresis auxiliary cathode is for connecting suction tube, the electrophoresis auxiliary cathode of electrophoresis auxiliary cathode
Fixture connecting machine tool main shaft, machine tool chief axis is for controlling electrophoresis auxiliary cathode at a distance from workpiece, the output of electrophoresis auxiliary system
End is separately connected electrophoresis auxiliary cathode and workpiece.Electrophoresis auxiliary system output voltage, and be conveyed to respectively electrophoresis auxiliary cathode and
Workpiece 6.It should be noted that there is electric field, convenient for the deposition of nano-scale particle between electrophoresis auxiliary cathode and workpiece 6.This reality
It applies in example and provides electric field using electrophoresis auxiliary system, can guarantee safe and stable electric field environment.
On the basis of any one above-mentioned embodiment, electrophoresis auxiliary cathode fixture is connect with machine tool chief axis, lathe master
Axis controls electrophoresis auxiliary cathode fixture at a distance from workpiece.
Optionally, to the fixture of electrophoresis auxiliary cathode and workpiece 6(or workpiece when processing) AC or DC sources is passed to,
Make to form auxiliary electric field between workpiece 6 and electrophoresis cathode, auxiliary particle orderly deposits, and improves deposition efficiency.
In a specific embodiment, machine tool chief axis 4 is connect with particle solution mixture circulatory system 2, and machine tool chief axis 4 connects
Attract pipe clamp, control attracts pipe clamp at a distance from workpiece, to influence the efficiency of particle deposition.
Machine tool chief axis 4 can be combined with particle solution mixture circulatory system 2, make solution by connecting with machine tool chief axis 4
Attract pipe clamp that the solution mixed is attracted to 6 surface of workpiece from particle solution mixture circulatory system 2, it can once can also be with
Repeatedly 6 surface of workpiece is placed in solution is mixed.
Optionally, several workpiece 6 and electrophoresis auxiliary cathode fixture 5 can be made to be combined collocation, and can be switched online not
Same cathode, that is, switch different workpiece 6, to form electrophoresis auxiliary electric field with different workpieces 6, realize that electrophoresis auxiliary is heavy
Product.
Adjustment to 6 position of workpiece for convenience avoids the fine tuning of position can not being carried out, upper after fixed workpiece
It states on the basis of any one embodiment, the rotating platform for placing workpiece 6, which is arranged, is being able to carry out three-dimensional movement
Micro- three-dimensional movement platform on, micro- three-dimensional movement platform is corresponding with machine tool chief axis vertical position.
Processing groove 7 for fixing workpiece 6 is mounted on micro- three-dimensional movement platform 11, and being mounted therein with work piece holder 8 can
So that workpiece 6 to be processed is mounted in processing groove, the modified processing in surface is carried out.Micro- three-dimensional movement platform 11 can make processing groove
7 carry out accurate directed movement, guarantee the relative position of processing groove 7 and machine tool chief axis 4, and solution before processing is made accurately to be placed in workpiece
On 6.
It further include for being covered in the part of workpiece surface, to realize on the basis of any one above-mentioned embodiment
Minor insulation processing movable exposure mask, specially use a kind of insulating cement body creative activity exposure mask, such as can be PDMS colloid cover
Film, certainly movable exposure mask can be dura mater and be also possible to mantle.Movable exposure mask is realized by covering and compressing on workpiece to work
Part locally carries out insulation processing, and above-mentioned solution is placed on workpiece to be processed, using electrophoresis auxiliary law metal workpiece surface
Obtain orderly particle alignment.Nonconducting part of movable exposure mask will not have electric field force effect to particle, so will not be to micro-
Grain is deposited with electrophoretic effect, and only workpiece exposed part has particle deposition, is modified so only having local surfaces, Ke Yigai
Become shape of template, to change local hydrophobe region shape, by the different location for changing mask plate, thus it is possible to vary not same district
The hydrophobe of field surface is structurally-modified.
Movable exposure mask and its control system 9 may be mounted in processing groove 7, pass through the phase of control activity exposure mask and workpiece 6
To position, and guarantee in process, movable exposure mask is mutually compressed with workpiece 6, to process workpiece regional area surface difference
Shape, the surface modification effect of different location.
On the basis of any one above-mentioned embodiment, temperature control device includes vacuum control module or auxiliary gas control
Module, temperature control device are also referred to as vacuum and temperature control system 13, it is ensured that the temperature control in it, and guarantee at work
The vacuum degree of the inside passes to other auxiliary gases, guarantees the needs when workpiece surface modification of metal, in addition, carrying out vacuum
Degree and temperature can also be implemented to observe while adjusting.
Optionally, the supplementary controlled system of electrophoresis system, rotating platform and particle solution mixture circulatory system are all connected with collection
At control cabinet.
In addition, supplementary controlled system can integrate on lathe, or setting is on the table.
It further include for workpiece surface deposition and molten condition on the basis of any one above-mentioned embodiment
Under the CCD Online Video detection system that is detected of distribution of particles situation.CCD Online Video detection system 3 is integrated in work
On platform 1, the distribution of particles situation under 6 surface deposition of workpiece and molten condition can be detected in real time.
In any one above-mentioned embodiment, integrated control cabinet 14 can be placed on 1 right side of workbench of lathe, integrate control
The systematic control program of institute of the present invention is integrated in cabinet 14 processed, it is ensured that the operation of all techniques of the present invention.
In any one above-mentioned embodiment, processing technology according to specific needs needs, first the nano particle of needs
It is placed in that particle solution mixture circulatory system 2 is inner to be sufficiently mixed, the workpiece 6 of metal to be processed is then placed in processing groove 7
It is interior, and clamped with work piece holder 8, micro- three-dimensional movement platform 11 and machine tool chief axis 4 are controlled by integrated control cabinet 14, solution is set
In on workpiece 6, auxiliary electric field can be formed by electrophoresis auxiliary system 12, carry out the modified processing in surface.It can control work simultaneously
The relative position of dynamic exposure mask and workpiece 6, and guarantee in process, movable exposure mask is mutually compressed with workpiece 6, with workpieces processing office
Portion's region surface different shape, the surface modification effect of different location.Furthermore it is also possible to pass through the realization of Rotable Control System 10
The spin-deposit process of grain.
It can be observed by CCD Online Video detection system 3 in process, then workpiece 6 is placed in very
Empty and temperature control system 13, is heated, and is controlled processing conditions, is finally reached the surface hydrophobe of the workpiece 6 of metal
It is modified.
In addition to the primary structure of metal surface modifying device provided by above-mentioned each embodiment, metal surface modification dress
Refer to the prior art for the structure of other each sections set, and repeats no more herein.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Metal surface modifying device provided by the present invention is described in detail above.It is used herein specifically a
Principle and implementation of the present invention are described for example, and it is of the invention that the above embodiments are only used to help understand
Method and its core concept.It should be pointed out that for those skilled in the art, not departing from the principle of the invention
Under the premise of, it can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the claims in the present invention
Protection scope in.
Claims (5)
1. a kind of metal surface modifying device characterized by comprising
For providing the particle solution mixture circulatory system of nanoparticles solution to workpiece；
For fixing workpiece and driving the rotating platform of the workpiece rotation；
Electrophoresis system, for making the particle in the nanoparticles solution in the particle solution mixture circulatory system with electrophoretic effect
Deposit to workpiece surface；
Temperature control device, the temperature control device is for changing the workpiece surface temperature；
The electrophoresis system includes:
For connecting the electrophoresis auxiliary cathode fixture of electrophoresis auxiliary cathode, the electrophoresis auxiliary cathode fixture is assisted equipped with electrophoresis
Cathode, the electrophoresis auxiliary cathode fixture of the electrophoresis auxiliary cathode are connected to machine tool chief axis, and the machine tool chief axis is for controlling institute
Electrophoresis auxiliary cathode is stated at a distance from the workpiece；
Electrophoresis auxiliary system, the output end of the electrophoresis auxiliary system are separately connected the electrophoresis auxiliary cathode and the workpiece；
The particle solution mixture circulatory system includes:
Particle solution mixing vessel, the particle solution mixing vessel are equipped with to the workpiece and provide the attraction of nanoparticles solution
Pipe and attraction pipe clamp, the suction tube are used to the nanoparticles solution being attracted to workpiece surface；Control the suction tube
Fixture is at a distance from workpiece, to influence the efficiency of particle deposition；
One or more of vibration device, magnetic stirring apparatus, suspension suction device and solution circulating device；
The rotating platform is arranged in the micro- three-dimensional movement platform for being able to carry out three-dimensional movement, and micro- three-dimensional motion is flat
Platform is corresponding with the machine tool chief axis vertical position；
It further include the part for the workpiece surface can be covered in, to realize the movable exposure mask of the insulation of minor insulation processing,
The activity exposure mask is the movable exposure mask of insulation.
2. metal surface modifying device according to claim 1, which is characterized in that the temperature control device includes vacuum control
Module or auxiliary Gas Control Module.
3. metal surface modifying device according to claim 2, which is characterized in that the auxiliary of the electrophoresis system controls system
System, the rotating platform and the particle solution mixture circulatory system are all connected with integrated control cabinet.
4. metal surface modifying device according to claim 3, which is characterized in that the supplementary controlled system is integrated in machine
On bed.
5. metal surface modifying device according to claim 4, which is characterized in that further include for being deposited to workpiece surface
Distribution of particles situation in situation and molten condition carries out detection CCD Online Video detection system.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710277868.XA CN106868570B (en) | 2017-04-25 | 2017-04-25 | A kind of metal surface modifying device |
| PCT/CN2017/111269 WO2018196346A1 (en) | 2017-04-25 | 2017-11-16 | Metal surface modification apparatus |
| US16/153,775 US20190040543A1 (en) | 2017-04-25 | 2018-10-07 | Metal surface modification apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710277868.XA CN106868570B (en) | 2017-04-25 | 2017-04-25 | A kind of metal surface modifying device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106868570A CN106868570A (en) | 2017-06-20 |
| CN106868570B true CN106868570B (en) | 2019-11-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710277868.XA Expired - Fee Related CN106868570B (en) | 2017-04-25 | 2017-04-25 | A kind of metal surface modifying device |
Country Status (2)
| Country | Link |
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| CN (1) | CN106868570B (en) |
| WO (1) | WO2018196346A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106906510B (en) * | 2017-04-25 | 2019-11-08 | 广东工业大学 | A kind of preparation facilities that workpiece local surfaces are modified |
| CN106906469B (en) * | 2017-04-25 | 2020-08-07 | 广东工业大学 | Micro-nano nested particle melting self-bonding surface modification equipment |
| CN106868572B (en) * | 2017-04-25 | 2019-07-09 | 广东工业大学 | A kind of electrophoresis auxiliary micro-nano particle fusion self assembly surface modifying apparatus |
| CN106868570B (en) * | 2017-04-25 | 2019-11-08 | 广东工业大学 | A kind of metal surface modifying device |
| CN108671972A (en) * | 2018-07-19 | 2018-10-19 | 广东工业大学 | The preparation method and Preparation equipment of metal-surface nano structure |
| CN109055936A (en) * | 2018-10-12 | 2018-12-21 | 河南理工大学 | A kind of colloidal particle exposure mask preparation facilities |
| CN110424041B (en) * | 2019-06-20 | 2021-05-28 | 苏州潜寻新能源科技有限公司 | Method for preparing modulatable modified surface for enhancing boiling |
| CN111379003B (en) * | 2020-05-15 | 2022-04-01 | 重庆厚泽精密机械有限公司 | Surface quality processing device and process for cathode electrophoretic paint of automobile parts |
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| CN103551926A (en) * | 2013-11-11 | 2014-02-05 | 广东工业大学 | Device for polishing micropores through electrophoresis auxiliary micro-ultrasonic or micro-rotating ultrasonic and processing method |
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| JPS5853967A (en) * | 1981-09-25 | 1983-03-30 | Mitsubishi Electric Corp | Preparation of insulating material of electric conductor and its device |
| US7455757B2 (en) * | 2001-11-30 | 2008-11-25 | The University Of North Carolina At Chapel Hill | Deposition method for nanostructure materials |
| KR20050002866A (en) * | 2002-03-22 | 2005-01-10 | 도요 잉키 세이조 가부시끼가이샤 | Process for producing microcapsule enclosing electrophoretic particle dispersion, microcapsule enclosing electrophoretic particle dispersion and reversible display medium containing the same |
| CN102230207A (en) * | 2011-06-21 | 2011-11-02 | 华映光电股份有限公司 | Electrophoretic deposition apparatus and electrophoretic deposition method |
| CN103273386B (en) * | 2013-05-22 | 2016-05-18 | 广东工业大学 | The auxiliary fine ultrasonic machine tool of a kind of electrophoresis and processing method |
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- 2017-04-25 CN CN201710277868.XA patent/CN106868570B/en not_active Expired - Fee Related
- 2017-11-16 WO PCT/CN2017/111269 patent/WO2018196346A1/en active Application Filing
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| CN103551926A (en) * | 2013-11-11 | 2014-02-05 | 广东工业大学 | Device for polishing micropores through electrophoresis auxiliary micro-ultrasonic or micro-rotating ultrasonic and processing method |
| CN103909288A (en) * | 2014-04-04 | 2014-07-09 | 广东工业大学 | Electrophoretic assisted ultrasonic mechanical composite micro-drilling machining device |
| CN206858682U (en) * | 2017-04-25 | 2018-01-09 | 广东工业大学 | A kind of metal surface modifying device |
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| Publication number | Publication date |
|---|---|
| CN106868570A (en) | 2017-06-20 |
| WO2018196346A1 (en) | 2018-11-01 |
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