CN106868570A - A kind of metal surface modifying device - Google Patents
A kind of metal surface modifying device Download PDFInfo
- Publication number
- CN106868570A CN106868570A CN201710277868.XA CN201710277868A CN106868570A CN 106868570 A CN106868570 A CN 106868570A CN 201710277868 A CN201710277868 A CN 201710277868A CN 106868570 A CN106868570 A CN 106868570A
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- workpiece
- electrophoresis
- metal surface
- particle
- modifying device
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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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention discloses a kind of metal surface modifying device, including：Particle solution mixture circulatory system for providing from nanoparticles solution to workpiece；For fix workpiece and drive workpiece rotate rotation platform；Electrophoresis system, for making the particle in the nanoparticles solution in particle solution mixture circulatory system deposit to workpiece surface with electrophoretic effect；Attemperating unit, attemperating unit is used to change workpiece surface temperature；The metal surface modifying device that the present invention is provided can carry out the compound metal surface hydrophobe modification of one or more different process, natural sediment method, spin-coating method or electrophoretic deposition auxiliary micro-nano particle can be utilized, it is surface-treated on the irregular metal such as arbitrary plane, curved surface, boss, groove surface, metal surface is set to obtain orderly particle alignment, surface is carried out to be modified, 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 materials application technical field, more specifically to a kind of metal surface modifying device.
Background technology
The high speed development of modern science and technology, the increasingly raising to metal material surface characteristics requirement, to process for treating surface and
Technique has new development and expansion, surface of workpiece is carried out the biomimetic features such as hydrophobe surface it is modified be more popular
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 problem in these methods：Need to carry out high-temperature process, it is relatively costly, and impregnating
Modified material attachment may be uneven in journey, is easily caused treatment carbon material surface hydrophobe property uneven.Nickel salt thermal decomposition method
It is not suitable for the relatively low matrix material of fusing point, 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 possess general applicability generally.
In sum, how to provide a kind of applicability wider reforming apparatus, be that current those skilled in the art urgently solve
Problem certainly.
The content of the invention
In view of this, it is an object of the invention to provide a kind of metal surface modifying device, the metal surface modifying device can
To carry out polytype modification, convenient use, relevance grade is higher.
To achieve these goals, the present invention provides following technical scheme：
A kind of metal surface modifying device, including：
Particle solution mixture circulatory system for providing from nanoparticles solution to workpiece；
For the rotation platform for fixing workpiece and drive the workpiece to rotate；
Electrophoresis system, for making the nanoparticles solution in the particle solution mixture circulatory system with electrophoretic effect in
Particle deposits to workpiece surface；
Attemperating unit, the attemperating unit is used to change the workpiece surface temperature.
Preferably, the particle solution mixture circulatory system includes：
Particle solution stainless steel, the particle solution stainless steel is provided with and provides nanoparticles solution to the workpiece
Suction tube and attraction pipe clamp, the suction tube are used to for the nanoparticles solution to be attracted to workpiece surface；
One or more in vibrating device, magnetic stirring apparatus, suspension suction device and solution circulating device.
Preferably, the electrophoresis system includes：
Electrophoresis auxiliary cathode fixture for connecting the electrophoresis auxiliary cathode, the electrophoresis auxiliary cathode fixture is provided with
Electrophoresis auxiliary cathode, the electrophoresis auxiliary cathode fixture of the electrophoresis auxiliary cathode is connected to machine tool chief axis, and the machine tool chief axis are used
In the distance for controlling the electrophoresis auxiliary cathode and the workpiece；
Electrophoresis accessory system, the output end of the electrophoresis accessory system connects the electrophoresis auxiliary cathode and the work respectively
Part.
Preferably, the rotation platform is arranged on can be carried out in micro- three-dimensional movement platform of three-dimensional motion, described
Micro- three-dimensional movement platform is corresponding with the machine tool chief axis vertical position.
Preferably, also covered including the activity local, to realize minor insulation treatment for being covered in the workpiece surface
Film, the movable mask is the movable mask of insulation.
Preferably, the attemperating unit includes vacuum control module or auxiliary Gas Control Module.
Preferably, the supplementary controlled system of the electrophoresis system, the rotation platform and the particle solution mixing circulation
System is all connected with integrated switch board.
Preferably, the supplementary controlled system is integrated on lathe.
Preferably, also including for being detected to the distribution of particles situation under workpiece surface deposition conditions and molten condition
CCD video detection systems.
The metal surface modifying device that the present invention is provided can carry out the compound metal watch of one or more different process
Face hydrophobe modification, it is possible to use natural sediment method, spin-coating method or electrophoretic deposition auxiliary micro-nano particle, is arbitrarily putting down
The irregular metal such as face, curved surface, boss, groove surface is surface-treated, and metal surface is obtained orderly particle alignment, is entered
Row surface is modified, and can also change workpiece surface temperature by firing equipment, realizes enhancing micro-nano modified particles and workpiece surface
Adhesion.Metal surface modifying device provided by the present invention it is widely applicable, modification efficiency is high and easy to use.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying 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 is particle solution mixture circulatory system, and 3 is CCD Online Video detecting systems, and 4 is machine tool chief axis,
5 is electrophoresis auxiliary cathode fixture, and 6 is metal works to be processed, and 7 is processing groove, and 8 is work piece holder, and 9 is movable mask and its control
System processed, 10 is Rotable Control System, and 11 is micro- three-dimensional movement platform, and 12 is electrophoresis accessory system, and 13 is vacuum and temperature control
System processed, 14 is integrated switch board.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Core of the invention is to provide a kind of metal surface modifying device, and the metal surface modifying device can carry out various
The modification of type, convenient use, relevance grade is higher.
Fig. 1 is refer to, 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 including particle solution mixture circulatory system,
Rotation platform, electrophoresis system and attemperating unit.
Wherein, particle solution mixture circulatory system is used to provide nanoparticles solution, hereinafter referred to as solution, particle to workpiece
Solution mixture circulatory system is used to realize that natural sediment method deposits to workpiece to the nano-scale particle in solution；Rotation platform is used for
Fixed workpiece simultaneously drives workpiece to rotate, and particle solution mixture circulatory system provides nanoparticles solution to the workpiece in rotation, from
And realize that spin-coating method is deposited, that is to say, that rotation platform coordinates 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
To workpiece surface, the electrophoretic effect of electrophoresis system enables to the deposition velocity in solution to accelerate, deposit to rice grain liquid deposition
Efficiency raise, further, since electrophoretic deposition technique have it is easy to control, to particle type and particle surface state without particular/special requirement
The advantages of, it is possible on the irregular metal such as arbitrary plane, curved surface, boss, groove surface, carry out mixing micro-nano particle migration
Migrated with absorption or gradation and absorption variety classes particle.It should be noted that the effect of electrophoresis is to draw and accelerate ultra micro
The deposition of particle.Above-mentioned attemperating unit is used to change workpiece surface temperature, close and distant to realize workpiece surface particle fusion self assembly
Water is modified.
Optionally, above-mentioned particle solution mixture circulatory system, rotation platform, electrophoresis system and attemperating unit can be with collection
Connected into switch board 14, the integrated control so as to integrated switch board 14 to said apparatus.
The metal surface modifying device that the present invention is provided can carry out the compound metal watch of one or more different process
Face hydrophobe modification, it is possible to use natural sediment method, spin-coating method or electrophoretic deposition aided nano particle, is arbitrarily putting down
The irregular metal such as face, curved surface, boss, groove surface is surface-treated, and metal surface is obtained orderly particle alignment, is entered
Row surface is modified, and can also change workpiece surface temperature by firing equipment, realizes the nano level modified particle of enhancing and the table of workpiece 6
Face adhesion.
Above-described embodiment basis on, above-mentioned particle solution mixture circulatory system include particle solution stainless steel with
And one or more in vibrating device, magnetic stirring apparatus, suspension suction device and solution circulating device.Wherein, particle
Solution stainless steel to be provided with and provide the suction tube of nanoparticles solution to workpiece and attract 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
Negative electrode and electrophoresis accessory system.Wherein, electrophoresis auxiliary cathode is used to connect suction tube, the electrophoresis auxiliary cathode of electrophoresis auxiliary cathode
Fixture connecting machine tool main shaft, machine tool chief axis are used to control the distance of electrophoresis auxiliary cathode and workpiece, the output of electrophoresis accessory system
End connects electrophoresis auxiliary cathode and workpiece respectively.Electrophoresis accessory system output voltage, and be conveyed to respectively electrophoresis auxiliary cathode and
Workpiece 6.It should be noted that having electric field between electrophoresis auxiliary cathode and workpiece 6, it is easy to the deposition of nano-scale particle.This reality
Apply in example and provide electric field using electrophoresis accessory system, ensure that the electric field environment of safety and stabilization.
On the basis of above-mentioned any one embodiment, electrophoresis auxiliary cathode fixture is connected with machine tool chief axis, lathe master
Axle controls the distance of electrophoresis auxiliary cathode fixture and workpiece.
Optionally, either AC or DC sources are passed to electrophoresis auxiliary cathode and workpiece 6 (or fixture of workpiece) during processing,
Make to form auxiliary electric field between workpiece 6 and electrophoresis negative electrode, auxiliary particle is deposited in order, and improves deposition efficiency.
In a specific embodiment, the main shaft 4 of lathe is connected with particle solution mixture circulatory system 2, and the connection of main shaft 4 is inhaled
Skirt fixture, control attracts the distance of pipe clamp and workpiece, so as to influence the efficiency that particle is deposited.
Machine tool chief axis 4 can be combined with particle solution mixture circulatory system 2, make solution by the attraction that is connected with main shaft 4
The solution for mixing is attracted to the surface of workpiece 6 by pipe clamp from particle solution mixture circulatory system 2, can once can also be multiple
The surface of workpiece 6 is placed in solution is mixed.
Optionally, several workpiece 6 and the combined collocation of electrophoresis auxiliary cathode fixture 5 can be made, and can be switched online not
Same negative electrode, that is, switch different workpiece 6, so as to constitute electrophoresis auxiliary electric field with different workpieces 6, realize that electrophoresis auxiliary is heavy
Product.
For convenience to the adjustment of the position of workpiece 6, it is to avoid after fixed workpiece, it is impossible to the fine setting of position is enough carried out, upper
State on the basis of any one embodiment, the rotation platform for placing workpiece 6 is arranged on can carry out three-dimensional motion
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 arranged on micro- three-dimensional movement platform 11, and being mounted therein with work piece holder 8 can
So that workpiece to be processed 6 is arranged 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, it is ensured that the relative position of processing groove 7 and main shaft 4, and solution is accurately placed on workpiece 6 before making processing.
On the basis of above-mentioned any one embodiment, also including the part for being covered in workpiece surface, with realization
The movable mask of minor insulation treatment, specially with a kind of insulating cement body creative activity mask, for example, can cover for PDMS colloids
Film, activity mask can be that dura mater can also be mantle certainly.Movable mask is realized to work by covering and being pressed on workpiece
Part locally carries out insulation processing, and above-mentioned solution is placed on metal works to be processed, using electrophoresis auxiliary law in metal works table
Face obtains orderly particle alignment.Nonconducting part of movable mask will not have electric field force to act on particulate, so will not be right
Particle deposition has electrophoretic effect, and only workpiece exposed part has particle deposition, so only have local surfaces be modified, can be with
Change shape of template, so that change local hydrophobe region shape, by the diverse location for changing mask plate, thus it is possible to vary different
The hydrophobe of region surface is structurally-modified.
Movable mask and control system 9 may be mounted in processing groove 7, relative with workpiece 6 by control activity mask
Position, and ensure process, movable mask is mutually compressed with workpiece 6, to process workpiece regional area surface not similar shape
Shape, the surface modification effect of diverse location.
On the basis of above-mentioned any one embodiment, attemperating unit includes vacuum control module or auxiliary gas control
Module, attemperating unit is also referred to as vacuum and temperature control system 13, it is ensured that the temperature control in it, and operationally ensures
The vacuum of the inside passes to other auxiliary gases, it is ensured that the need for when surface of workpiece is modified, in addition, carrying out vacuum
Observation can also be implemented while with temperature adjustment.
Optionally, the supplementary controlled system of electrophoresis system, rotation platform and particle solution mixture circulatory system are all connected with collection
Into switch board.
In addition, supplementary controlled system can be integrated on lathe, or set on the table.
On the basis of above-mentioned any one embodiment, also including for workpiece surface deposition conditions and molten condition
Under the CCD video detection systems that are detected of distribution of particles situation.CCD video detection systems 3 are integrated on machining tool 1,
The distribution of particles situation under the surface deposition conditions of metal works 6 and molten condition can be detected in real time.
In above-mentioned any one embodiment, integrated switch board 14 can be placed on the right side of workbench 1 of lathe, integrated control
The systematic control program of institute of the present invention is integrated with cabinet processed 14, it is ensured that the operation of all techniques of the present invention.
In above-mentioned any one embodiment, processing technology according to specific needs needs, first the nano particle for needing
It is placed in particle solution mixture circulatory system 2 and is sufficiently mixed, then metal works to be processed 6 is placed in processing groove 7, and
Clamped with work piece holder 8, micro- three-dimensional movement platform 11 and machine tool chief axis 4 are controlled by integrated switch board 14, solution is placed in work
On part 6, auxiliary electric field can be formed by electrophoresis accessory system 12, carry out the modified processing in surface.Simultaneously activity can be controlled to cover
The relative position of film and workpiece 6, and ensure process, movable mask is mutually compressed with workpiece 6, to process workpiece partial zones
Field surface different shape, the surface modification effect of diverse location.Furthermore it is also possible to passing through Rotable Control System 10 realizes particle
Spin-deposit process.
It can be observed by CCD on-line monitoring systems 3 in process, then workpiece 6 be placed in vacuum and
Temperature control system 13, is heated, and controls processing conditions, and the surface hydrophobe for being finally reached metal works 6 is modified.
Except the primary structure of the metal surface modifying device that above-mentioned each embodiment is provided, metal surface modification dress
The structure of other each several parts put refer to prior art, repeat no more herein.
Each embodiment is described by the way of progressive in this specification, and what each embodiment was stressed is and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
Metal surface modifying device provided by the present invention is described in detail above.It is used herein specifically individual
Example is set forth to principle of the invention and implementation method, and the explanation of above example is only intended to help and understands of the invention
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
On the premise of, some improvement and modification can also be carried out to the present invention, these are improved and modification also falls into the claims in the present invention
Protection domain in.
Claims (9)
1. a kind of metal surface modifying device, it is characterised in that including：
Particle solution mixture circulatory system for providing from nanoparticles solution to workpiece；
For the rotation platform for fixing workpiece and drive the workpiece to rotate；
Electrophoresis system, for making the particle in the nanoparticles solution in the particle solution mixture circulatory system with electrophoretic effect
Deposit to workpiece surface；
Attemperating unit, the attemperating unit is used to change the workpiece surface temperature.
2. metal surface modifying device according to claim 1, it is characterised in that the particle solution mixture circulatory system
Including：
Particle solution stainless steel, the particle solution stainless steel is provided with the attraction that nanoparticles solution is provided to the workpiece
Pipe and attraction pipe clamp, the suction tube are used to for the nanoparticles solution to be attracted to workpiece surface；
One or more in vibrating device, magnetic stirring apparatus, suspension suction device and solution circulating device.
3. metal surface modifying device according to claim 2, it is characterised in that the electrophoresis system includes：
Electrophoresis auxiliary cathode fixture for connecting the electrophoresis auxiliary cathode, the electrophoresis auxiliary cathode fixture is provided with electrophoresis
Auxiliary cathode, the electrophoresis auxiliary cathode fixture of the electrophoresis auxiliary cathode is connected to machine tool chief axis, and the machine tool chief axis are used to control
Make the distance of the electrophoresis auxiliary cathode and the workpiece；
Electrophoresis accessory system, the output end of the electrophoresis accessory system connects the electrophoresis auxiliary cathode and the workpiece respectively.
4. the metal surface modifying device according to claims 1 to 3 any one, it is characterised in that the rotation platform
Being arranged on to be carried out in micro- three-dimensional movement platform of three-dimensional motion, micro- three-dimensional movement platform and the machine tool chief axis
Vertical position correspondence.
5. metal surface modifying device according to claim 4, it is characterised in that also including for the work can be covered in
The part on part surface, to realize the movable mask of the insulation that minor insulation is processed, the movable mask is the movable mask of insulation.
6. metal surface modifying device according to claim 5, it is characterised in that the attemperating unit includes vacuum control
Module or auxiliary Gas Control Module.
7. metal surface modifying device according to claim 6, it is characterised in that the auxiliary control system of the electrophoresis system
System, the rotation platform and the particle solution mixture circulatory system are all connected with integrated switch board.
8. metal surface modifying device according to claim 7, it is characterised in that the supplementary controlled system is integrated in machine
On bed.
9. metal surface modifying device according to claim 8, it is characterised in that also including for being deposited to workpiece surface
Distribution of particles situation in situation and molten condition carries out detecting CCD video detection systems.
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 true CN106868570A (en) | 2017-06-20 |
| CN106868570B CN106868570B (en) | 2019-11-08 |
Family
ID=59161608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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 |
|---|---|
| CN (1) | CN106868570B (en) |
| WO (1) | WO2018196346A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2018196347A1 (en) * | 2017-04-25 | 2018-11-01 | 广东工业大学 | Preparation device for use in partial surface modification of work piece |
| WO2018196346A1 (en) * | 2017-04-25 | 2018-11-01 | 广东工业大学 | Metal surface modification apparatus |
| WO2018196241A1 (en) * | 2017-04-25 | 2018-11-01 | 广东工业大学 | Electrophoresis-assisted micro-nano particle melting self-assembly surface modification equipment |
| WO2018196242A1 (en) * | 2017-04-25 | 2018-11-01 | 广东工业大学 | Micro-nano nested particle melting self-bonding surface modification device |
| CN109055936A (en) * | 2018-10-12 | 2018-12-21 | 河南理工大学 | A kind of colloidal particle exposure mask preparation facilities |
| CN110424041A (en) * | 2019-06-20 | 2019-11-08 | 吴赞 | A kind of modulated modified surface preparation method for being used to strengthen boiling |
| CN111379003A (en) * | 2020-05-15 | 2020-07-07 | 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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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018196347A1 (en) * | 2017-04-25 | 2018-11-01 | 广东工业大学 | Preparation device for use in partial surface modification of work piece |
| WO2018196346A1 (en) * | 2017-04-25 | 2018-11-01 | 广东工业大学 | Metal surface modification apparatus |
| WO2018196241A1 (en) * | 2017-04-25 | 2018-11-01 | 广东工业大学 | Electrophoresis-assisted micro-nano particle melting self-assembly surface modification equipment |
| WO2018196242A1 (en) * | 2017-04-25 | 2018-11-01 | 广东工业大学 | Micro-nano nested particle melting self-bonding surface modification 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 |
| CN110424041A (en) * | 2019-06-20 | 2019-11-08 | 吴赞 | A kind of modulated modified surface preparation method for being used to strengthen boiling |
| CN111379003A (en) * | 2020-05-15 | 2020-07-07 | 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106868570B (en) | 2019-11-08 |
| WO2018196346A1 (en) | 2018-11-01 |
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