CN107931756B - Method for preparing cathode of tool for cutting carbon nano tube fiber by micro electrolysis line - Google Patents

Method for preparing cathode of tool for cutting carbon nano tube fiber by micro electrolysis line Download PDF

Info

Publication number
CN107931756B
CN107931756B CN201711018428.9A CN201711018428A CN107931756B CN 107931756 B CN107931756 B CN 107931756B CN 201711018428 A CN201711018428 A CN 201711018428A CN 107931756 B CN107931756 B CN 107931756B
Authority
CN
China
Prior art keywords
carbon nanotube
nano tube
cathode
carbon nano
micro
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201711018428.9A
Other languages
Chinese (zh)
Other versions
CN107931756A (en
Inventor
曾永彬
孟岭超
朱荻
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing University of Aeronautics and Astronautics
Original Assignee
Nanjing University of Aeronautics and Astronautics
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanjing University of Aeronautics and Astronautics filed Critical Nanjing University of Aeronautics and Astronautics
Priority to CN201711018428.9A priority Critical patent/CN107931756B/en
Publication of CN107931756A publication Critical patent/CN107931756A/en
Application granted granted Critical
Publication of CN107931756B publication Critical patent/CN107931756B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23HWORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H3/00Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
    • B23H3/04Electrodes specially adapted therefor or their manufacture
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23HWORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H3/00Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
    • B23H3/04Electrodes specially adapted therefor or their manufacture
    • B23H3/06Electrode material

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

the invention relates to a preparation method of a tool cathode for cutting carbon nano tube fibers by using a micro electrolysis line, belonging to the field of micro electrochemical machining. The method is characterized in that: firstly, mounting carbon nanotube fibers on a wire electrode clamp through a conductive fastening screw; then, plating a layer of metal on the local surface or the whole surface of the original carbon nanotube fiber by a micro electroplating method to improve the whole conductivity of the original carbon nanotube fiber so as to meet the requirement of micro electrolytic wire cutting processing; and finally, the excellent surface hydrophilic property of the carbon nanotube fiber and the reciprocating vibration of the carbon nanotube fiber in the direction perpendicular to the feeding direction are utilized to accelerate the mass transfer rate in the micro-machining gap and improve the stability and efficiency of the micro-electrolysis linear cutting machining.

Description

Method for preparing cathode of tool for cutting carbon nano tube fiber by micro electrolysis line
Technical Field
The invention relates to a preparation method of a tool cathode for cutting carbon nano tube fibers by using a micro electrolysis line, belonging to the field of micro electrochemical machining.
background
The micro electrolytic wire cutting technology is a material reducing manufacturing method based on the electrochemical anode dissolution principle. The method takes a metal wire with the diameter of several micrometers to tens of micrometers as a tool line electrode, can realize the preparation of a plane profile structure with any shape by combining multi-axis numerical control motion, and is particularly suitable for processing micro-slits, micro-grooves and metal microstructures with large depth-to-width ratios. Compared with other fine machining methods, the fine electrolytic wire cutting technology has the characteristics of wide machining range (not limited by material strength and hardness), high efficiency, no recast layer and microcrack on the surface, no loss of a tool electrode and the like.
The wire electrode is a necessary condition for carrying out micro-electrolysis wire cutting machining, the characteristic size of the wire electrode directly influences the quality of a formed part, and the performance of the wire electrode directly influences the stability and the efficiency of the wire cutting machining process. When a wire electrode is used for electrolytic machining of a high-aspect-ratio fine structure, the side gap is usually reduced to several microns or even to a submicron scale, and a machined product is easy to accumulate in a machining area, so that the local electrolyte components and concentration in the machining area are changed to a great extent, the reaction speed is reduced, even short circuit is caused, and the machining cannot be continuously carried out. According to literature reports, researchers respectively provide enhanced mass transfer methods such as one-way wire moving of a ring-shaped wire electrode, axial reciprocating micro-amplitude vibration of the wire electrode, reciprocating wire conveying of the wire electrode and the like so as to improve the machining quality, efficiency and stability of micro-electrolysis wire cutting. The common characteristic of the above-mentioned methods is that the movement of the wire electrode in the axial direction is used to promote the electrolyte in the machining gap to flow, thereby increasing the mass transfer speed in the gap. However, the wire electrode commonly used at present is made of metal, such as tungsten wire, molybdenum wire, platinum wire, etc. The surfaces of the electrode wires are relatively smooth, and the 'dragging force' generated by the movement of the electrode wires hardly causes the rapid flow of electrolyte in the gaps, which is one of the main factors that the processing efficiency cannot be further improved. In the conventional micro-fluid research, the problem of reducing the flow resistance is often focused, but the problem faced in the micro-wire cutting process is the opposite, and the movement of the cutting tool needs to "drive" as much electrolyte as possible, so that the flow resistance between the fluid and the wall surface of the solid tool needs to be increased. Research shows that the surface of the micro-nano flow channel has hydrophilicity, so that the flow resistance between liquid and solid can be effectively enhanced, the boundary slippage between the solid and the liquid is inhibited, and the dragging force between the solid and the liquid is increased. Therefore, the micro tool with the super-hydrophilic surface is introduced into micro electrolytic wire cutting processing, more electrolyte is driven to move by pulling the tool, the problem that products in a processing gap are discharged quickly is hopefully solved, and the processing precision and efficiency of the micro electrolytic wire cutting processing are improved.
Since 1991, Carbon Nanotubes (CNTs) were discovered by the Japanese Electron microscopy expert Iijima, they have attracted extensive interest from experts in different research areas worldwide due to their unique structures and superior properties. The university of Qinghua Van-Daizian team in 2002 pulls out fiber materials with continuous lengths from the carbon nanotube array, and greatly promotes the development of novel fibers, namely carbon nanotube fibers. Research shows that compared with natural fibers and traditional chemical fibers, the carbon nanotube fibers have obvious difference in structure, and the unique assembly structure characteristics of the carbon nanotube fibers endow the fibers with rich interface structures and excellent surface properties. Compared with the similar carbon-based composite material, the carbon nanotube fiber has higher thermal conductivity and mechanical strength than the graphene fiber which is currently developed, and also has light weight and weavability which are not possessed by the carbon fiber, thereby being convenient for processing and treatment. Although carbon nanotubes have excellent application prospects in the fields of structural materials and functional materials, the carbon nanotubes are easy to generate internal defects in the preparation process, and organic solvent molecules or resin interlayers are easy to mix in the fiber preparation process, so that the conductivity of the carbon nanotube fiber is about 2 orders of magnitude lower than that of the conventional copper at present. Therefore, how to further improve the conductivity of the carbon nanotube fiber and widen the application field range of the carbon nanotube fiber becomes an urgent problem to be solved.
disclosure of Invention
The invention aims to provide a preparation method of a carbon nano tube fiber tool cathode suitable for micro-electrolysis wire cutting, aiming at the problems of product discharge in a micro-machining gap of micro-electrolysis wire cutting, difficulty in electrolyte renewal and poor machining stability.
A method for preparing a cathode of a tool for cutting carbon nano tube fibers by a micro electrolysis line is characterized by comprising the following steps: the tool cathode comprises a cathode line electrode clamp and carbon nanotube fibers, wherein two ends of the carbon nanotube fibers are fixed on the cathode line electrode clamp through conductive fastening screws; the carbon nano tube fiber is a processing section at the notch structure of the cathode wire electrode clamp, and the rest part is a non-processing section; the carbon nano tube fiber has a spiral surface appearance and a diameter of 10 mu m; the non-processing section of the carbon nano tube fiber is electroplated with a metal coating with the thickness of 15 mu m, and the material of the metal coating is silver, nickel or copper; the method comprises the following processes: step 1, installing carbon nanotube fibers on a line electrode clamp through a conductive fastening screw; wherein, an insulating sleeve is arranged on the carbon nano tube fiber at the notch structure of the cathode line electrode clamp; and 2, immersing the cathode of the tool into an electroplating bath filled with electroplating solution, and carrying out micro-electroplating on the non-processed section of the carbon nano tube fiber to form a uniform metal coating on the surface of the non-processed section of the carbon nano tube fiber, wherein the current density of electroplating is 20A/dm2, and the time is 20 min.
a method for preparing a cathode of a tool for cutting carbon nano tube fibers by a micro electrolysis line is characterized by comprising the following steps: the tool cathode comprises a cathode line electrode clamp and carbon nanotube fibers, wherein two ends of the carbon nanotube fibers are fixed on the cathode line electrode clamp through conductive fastening screws; the carbon nano tube fiber is a processing section at the notch structure of the cathode wire electrode clamp, and the rest part is a non-processing section; the carbon nano tube fiber has a spiral surface appearance and a diameter of 10 mu m; the non-processing section of the carbon nano tube fiber is electroplated with a metal coating with the thickness of 10 mu m, and the material of the metal coating is silver, nickel or copper; the method comprises the following processes: step 1, installing carbon nanotube fibers on a line electrode clamp through a conductive fastening screw; wherein, an insulating sleeve is arranged on the carbon nano tube fiber at the notch structure of the cathode line electrode clamp; and 2, immersing the cathode of the tool into an electroplating bath filled with electroplating solution, and carrying out micro-electroplating on the non-processed section of the carbon nano tube fiber to form a uniform metal coating on the surface of the non-processed section of the carbon nano tube fiber, wherein the current density of electroplating is 10A/dm2, and the time is 10 min.
A method for preparing a cathode of a tool for cutting carbon nano tube fibers by a micro electrolysis line is characterized by comprising the following steps:
The tool cathode comprises a cathode line electrode clamp and carbon nanotube fibers, wherein two ends of the carbon nanotube fibers are fixed on the cathode line electrode clamp through conductive fastening screws; the carbon nano tube fiber has a spiral surface appearance and a diameter of 10 mu m; the carbon nano tube fiber is electroplated with a 4 mu m metal coating which is made of silver, nickel or copper; the preparation method comprises the following steps: step 1, installing carbon nanotube fibers on a line electrode clamp through a conductive fastening screw; and 2, immersing the cathode of the tool into an electroplating bath filled with electroplating solution, and carrying out micro-electroplating on the carbon nanotube fibers to form a uniform metal coating on the whole surface of the carbon nanotube fibers, wherein the electroplating current density is 8A/dm2, and the time is 5 min.
A method for preparing a cathode of a tool for cutting carbon nano tube fibers by a micro electrolysis line is characterized by comprising the following steps: the tool cathode comprises a cathode line electrode clamp and carbon nanotube fibers, wherein two ends of the carbon nanotube fibers are fixed on the cathode line electrode clamp through conductive fastening screws; the carbon nano tube fiber has a spiral surface appearance and a diameter of 10 mu m; the carbon nano tube fiber is electroplated with a 1 mu m metal coating which is made of silver, nickel or copper; the preparation method comprises the following steps: step 1, installing carbon nanotube fibers on a line electrode clamp through a conductive fastening screw; and 2, immersing the cathode of the tool into an electroplating bath filled with electroplating solution, and carrying out micro-electroplating on the carbon nanotube fibers to form a uniform metal coating on the whole surface of the carbon nanotube fibers, wherein the electroplating current density is 3A/dm2, and the time is 1 min.
the invention has the beneficial effects that:
1. The invention provides a carbon nanotube fiber tool cathode suitable for micro-electrolysis wire cutting and a preparation method thereof, firstly, on the basis of original carbon nanotube fibers, the electrical conductivity is optimized by a micro-electroplating method so as to meet the requirements of micro-electrolysis wire cutting processing; then, the excellent surface hydrophilic property of the carbon nano tube fiber and the reciprocating vibration of the carbon nano tube fiber in the direction vertical to the feeding direction are utilized, the mass transfer rate in a tiny processing gap is accelerated, and the stability and the efficiency of linear cutting processing are improved.
2. Generally, ohmic contact is formed between metallic carbon nanotubes and a metal electrode, and schottky contact is formed between semiconducting carbon nanotubes and a metal electrode. The schottky contact forms schottky barriers with different heights due to the difference of work functions of metal electrode materials, so that a larger contact resistance is generated between the carbon nanotube and the metal electrode. Therefore, the carbon nanotube fiber in this patent may form a large contact resistance with the conductive fastening screw. In addition, microscopic defects and organic resin interlayers are generally present inside the carbon nanotube fibers, reducing the electrical conductivity.
The metal coating provided by the invention plays a role of a bridge on the surface of the carbon nanotube fiber, can effectively improve the overall conductivity of the carbon nanotube fiber, is suitable for the carbon nanotube fiber with the diameter of 5-30 mu m, and has the advantages of good continuity of a micro electroplating process, simplicity and convenience in control, high efficiency, low cost and strong practicability.
When local electroplating is carried out, the processing section of the carbon nanotube fiber keeps the original appearance, the metal coating on the surface of the non-processing section is thicker, the thickness is generally 10-20 mu m, the contact resistance between the carbon nanotube fiber and the conductive fastening screw can be effectively reduced, a bridge is formed on the surface of the non-processing section of the carbon nanotube fiber, and the conductive performance of the carbon nanotube fiber can be effectively improved;
when the whole electroplating is carried out, the thin metal coating covers the surface of the carbon nano tube fiber to form a whole bridge, the thickness is generally 1-4 mu m, the reduction of the whole conductivity of the carbon nano tube fiber caused by internal defects and organic resin interlayers can be effectively compensated, but the metal coating does not influence the whole surface appearance and the hydrophilic performance of the carbon nano tube fiber.
Drawings
FIG. 1 is a schematic view of a carbon nanotube fiber tool cathode surface being electroplated.
Fig. 2 is a schematic diagram of a carbon nanotube fiber tool cathode surface after partial plating.
Fig. 3 is a schematic diagram of a carbon nanotube fiber tool cathode surface after bulk plating.
Fig. 4 is a schematic diagram of a carbon nanotube fiber tool cathode for use in micro-electro-mechanical wire cutting processes.
FIG. 5 is an electron micrograph of the surface of the cathode non-processing section of the carbon nanotube fiber tool after being partially electroplated, wherein the diameter of the spiral carbon nanotube fiber is 10 μm, the electroplating current density is 20A/dm2, the time is 20min, and the electroplating layer thickness is 15 μm.
FIG. 6 is an electron micrograph of the surface of the cathode non-processing section of the carbon nanotube fiber tool after being partially electroplated, wherein the diameter of the spiral carbon nanotube fiber is 10 μm, the electroplating current density is 10A/dm2, the time is 10min, and the electroplating layer thickness is 10 μm.
FIG. 7 is an electron micrograph of the surface of the cathode non-processing section of the carbon nanotube fiber tool after being partially electroplated, wherein the diameter of the spiral carbon nanotube fiber is 10 μm, the electroplating current density is 25A/dm2, the time is 30min, and the thickness of the electroplating layer is 25 μm.
FIG. 8 is an electron micrograph of the surface of the cathode non-processed section of the carbon nanotube fiber tool after being partially electroplated, wherein the diameter of the spiral carbon nanotube fiber is 10 μm, the current density of electroplating is 9A/dm2, the time is 9min, and the thickness of the electroplating layer is 7 μm.
FIG. 9 is an electron micrograph of the cathode of the carbon nanotube fiber tool after electroplating, wherein the diameter of the spiral carbon nanotube fiber is 10 μm, the current density of electroplating is 8A/dm2, the time is 5min, and the thickness of the electroplating layer is 4 μm.
FIG. 10 is an electron microscope photograph of the cathode of the carbon nanotube fiber tool after electroplating, wherein the diameter of the spiral carbon nanotube fiber is 10 μm, the current density of electroplating is 3A/dm2, the time is 1min, and the thickness of the electroplating layer is 1 μm.
FIG. 11 is an electron micrograph of the cathode of the carbon nanotube fiber tool after electroplating, wherein the diameter of the spiral carbon nanotube fiber is 10 μm, the current density of electroplating is 9A/dm2, the time is 7min, and the thickness of the electroplating layer is 6 μm.
The label names are: 1. a conductive fastening screw; 2. a wire electrode clamp; 3. carbon nanotube fibers; 4. an insulating sleeve; 5. a notch structure; 6. electroplating solution; 7. an electroplating bath; 8. a direct current power supply anode; 9. a metal plate; 10. a negative electrode of a direct current power supply; 11. a metal plating layer; 12. the processing area is free of coating carbon nanotube fibers; 13. carbon nanotube fiber with thin coating on the surface; 14. a workpiece; 15. a workpiece holder; 16. an electrolyte; 17. an electrolytic cell; 18. an air floating platform; 19. a CCD microscope; 20. an oscilloscope; 21. a pulse power supply; 22. an industrial personal computer; 23. a motion control card; 24. a Z motion control axis; 25. a Y motion control axis; 26. an X motion control axis; 27. a machine tool body.
Detailed Description
the three-dimensional motion control axis X-axis 26, the Y-axis 25 and the Z-axis 24 are arranged on a machine tool body 27, and the machine tool body 27 is fixed on the air floatation platform 18. The three-dimensional motion control axis is controlled by the industrial personal computer 22 through the motion control card 23.
(1) The carbon nanotube fiber 3 is mounted on a wire electrode holder 2 and immersed in a plating bath 7 containing a plating solution 6. The carbon nanotube fiber 3 is prepared from an array carbon nanotube by a spinning method, the surface appearance is spiral, and the diameter is 5-100 mu m; the metal plate 9 may be silver, nickel or copper, and the plating solution 6 is a mixed solution containing ions of the same metal element as the metal plate 9.
(2) Connecting a metal plate 9 with a direct current power supply anode 8, connecting the carbon nanotube fiber 3 with a direct current power supply cathode 10, and performing micro electroplating on the surface of the carbon nanotube fiber 3 to form a uniform metal coating 11 on the surface so as to improve the conductivity of the carbon nanotube fiber. When the carbon nanotube fiber 3 is locally electroplated, an insulating sleeve 4 can be arranged on the carbon nanotube fiber at the notch structure 5 of the wire electrode clamp, so that the carbon nanotube fiber at the processing section still keeps the original shape after the electroplating is finished; the current density of the electroplating can be 10-20A/dm 2, the time can be 10-20 min, and the thickness of the metal coating 11 on the surface of the carbon nano tube fiber at the non-processing stage is 10-20 μm. When the carbon nanotube fiber 13 with a thin coating on the surface is prepared by carrying out integral electroplating on the carbon nanotube fiber 3, the thin metal coating 11 covers the whole surface of the carbon nanotube fiber after the electroplating is finished, the electroplating current density can be 3-8A/dm 2, the time is 1-5 min, and the thickness of the metal coating 11 is 1-4 mu m; the metal plating layer 11 does not affect the overall surface morphology and the hydrophilic properties of the original carbon nanotube fiber 3.
(3) The prepared carbon nanotube fiber 3 is mounted as a tool wire electrode on a Z motion control shaft 24 of a micro electrolytic wire cutting machine by a wire electrode holder 2, the workpiece 14 is mounted on a holder 15, and the electrolytic solution 16 is poured into an electrolytic bath 17. The electrolyte can select acid, neutral and alkaline solutions with proper concentration according to different workpiece materials.
(4) The carbon nanotube fiber wire electrode 3 is connected with the negative electrode of a pulse power supply 21 through a conductive fastening screw 1, and the workpiece 14 is connected with the positive electrode of the pulse power supply 21, so that the micro-electrolytic wire cutting processing is carried out. The wire electrode clamp 2 and the carbon nanotube fiber wire electrode 3 are driven to vibrate up and down in a reciprocating manner through the motion control shaft Z shaft 24, so that the mass transfer efficiency in a machining gap is improved, wherein the vibration amplitude is 50-300 mu m, and the frequency is 0.5-10 Hz. The processing voltage range of the pulse power supply 21 can be 3-20V, the pulse width is 20-200 ns, the period is 0.5-10 mu s, and the processing speed range can be 0.1-5 mu m/s. In the machining process, the voltage pulse signal output by the pulse power supply 21 can be detected in real time through the oscilloscope 20, and a machining current signal is fed back at the same time. The CCD microscope 19 can observe and record the relative positional relationship between the wire electrode and the workpiece in real time, and the state of bubbles and other products generated in the machining area.
The wire electrode in the micro-electrolysis wire cutting processing is clamped on a wire electrode clamp under certain tension, generally, the conductivity of the wire electrode in the micro-electrolysis wire cutting processing needs to be more than 1x105S/cm, and the conductivity of the original carbon nano tube fiber is generally 1x 103S/cm-8 x 103S/cm. The electroplating method provided by the invention is suitable for carbon nanotube fiber line electrodes with the diameter of 5-30 mu m by optimizing the parameter interval.
FIG. 5 is an electron microscope photograph of the surface of the cathode non-processing section of the carbon nanotube fiber tool after local electroplating, wherein the diameter of the spiral carbon nanotube fiber is 10 μm, the electroplating current density is 20A/dm2, the time is 20min, the thickness of the electroplated layer is 15 μm, the conductivity is 9x106S/cm, the surface is flat and smooth, no crack exists, the quality is good, and the requirements of electrolytic machining of a line electrode are met.
FIG. 6 is an electron microscope photograph of the surface of the cathode non-processing section of the carbon nanotube fiber tool after local electroplating, wherein the diameter of the spiral carbon nanotube fiber is 10 μm, the electroplating current density is 10A/dm2, the time is 10min, the thickness of the electroplated layer is 10 μm, the conductivity is 4x106S/cm, the surface is smooth, no crack exists, the quality is good, and the requirements of electrolytic machining of a line electrode are met.
fig. 7 is an electron microscope photograph of the surface of the cathode non-processing section of the carbon nanotube fiber tool after local electroplating, wherein the diameter of the spiral carbon nanotube fiber is 10 μm, the electroplating current density is 25A/dm2, the time is 30min, the thickness of the electroplating layer is 25 μm, and the conductivity is 8x 106S/cm.
FIG. 8 is an electron micrograph of the surface of the cathode non-processing section of the carbon nanotube fiber tool after local electroplating, wherein the diameter of the spiral carbon nanotube fiber is 10 μm, the electroplating current density is 9A/dm2, the time is 9min, the thickness of the electroplated layer is 7 μm, the conductivity is only 9x104S/cm, the electroplated layer is not compact, cracks and defects are easily formed on the surface, and the requirements cannot be met.
FIG. 9 is an electron microscope photograph of the cathode of the carbon nanotube fiber tool after being electroplated, wherein the diameter of the spiral carbon nanotube fiber is 10 μm, the electroplating current density is 8A/dm2, the time is 5min, the thickness of the electroplated layer is 4 μm, the conductivity is 5x105S/cm, and the metal plating layer does not affect the overall surface morphology of the carbon nanotube fiber and meets the requirements of the electrochemical machining wire electrode.
FIG. 10 is an electron microscope photograph of the cathode of the carbon nanotube fiber tool after being electroplated, wherein the diameter of the spiral carbon nanotube fiber is 10 μm, the electroplating current density is 3A/dm2, the electroplating time is 1min, the thickness of the electroplating layer is 1 μm, the conductivity is 2x105S/cm, and the metal plating layer does not affect the overall surface morphology of the carbon nanotube fiber, thereby meeting the requirements of the electrochemical machining wire electrode. The example is the minimum parameter for carrying out overall electroplating on the carbon nanotube fiber, if the parameter is further reduced, namely the current density is less than 3A/dm2, the time is less than 1min, the plating layer is usually less than 1 μm, so that the electroplated layer is too thin and is difficult to observe, the conductivity of the original carbon nanotube fiber cannot be obviously improved, the implementation significance is not large, and the electroplating result with the further reduced parameter cannot meet the requirement.
FIG. 11 is an electron microscope photograph of the cathode of the carbon nanotube fiber tool after being electroplated, wherein the diameter of the spiral carbon nanotube fiber is 10 μm, the electroplating current density is 9A/dm2, the time is 7min, the thickness of the electroplated layer is 6 μm, the conductivity is only 7x104S/cm, and the metal plating layer changes the overall appearance of the carbon nanotube fiber and cannot meet the requirements.

Claims (2)

1. A method for preparing a cathode of a tool for cutting carbon nano tube fibers by a micro electrolysis line is characterized by comprising the following steps:
The tool cathode comprises a cathode wire electrode clamp (2) and carbon nanotube fibers (3) of which two ends are fixed on the cathode wire electrode clamp (2) through conductive fastening screws (1); the carbon nano tube fiber (3) is a processing section at the notch structure (5) of the cathode wire electrode clamp (2), and the rest part is a non-processing section; the surface appearance of the carbon nano tube fiber (3) is spiral, and the diameter is 10 mu m;
The non-processing section of the carbon nano tube fiber (3) is electroplated with a metal plating layer (11) with the thickness of 15 mu m, and the material of the metal plating layer (11) is silver, nickel or copper;
The method comprises the following processes:
step 1, installing carbon nanotube fibers (3) on a line electrode clamp (2) through conductive fastening screws (1); wherein an insulating sleeve (4) is arranged on the carbon nano tube fiber at the notch structure (5) of the cathode line electrode clamp (2);
And 2, immersing the cathode of the tool into a plating tank (7) filled with a plating solution (6), and performing micro-electroplating on the non-processing section of the carbon nano tube fiber (3) to form a uniform metal coating (11) on the surface of the carbon nano tube fiber, wherein the current density of electroplating is 20A/dm2, and the time is 20 min.
2. A method for preparing a cathode of a tool for cutting carbon nano tube fibers by a micro electrolysis line is characterized by comprising the following steps:
The tool cathode comprises a cathode wire electrode clamp (2) and carbon nanotube fibers (3) of which two ends are fixed on the cathode wire electrode clamp (2) through conductive fastening screws (1); the carbon nano tube fiber (3) is a processing section at the notch structure (5) of the cathode wire electrode clamp (2), and the rest part is a non-processing section; the surface appearance of the carbon nano tube fiber (3) is spiral, and the diameter is 10 mu m; the non-processing section of the carbon nano tube fiber (3) is electroplated with a metal plating layer (11) with the thickness of 10 mu m, and the material of the metal plating layer (11) is silver, nickel or copper;
The method comprises the following processes:
Step 1, installing carbon nanotube fibers (3) on a line electrode clamp (2) through conductive fastening screws (1); wherein an insulating sleeve (4) is arranged on the carbon nano tube fiber at the notch structure (5) of the cathode line electrode clamp (2);
and 2, immersing the cathode of the tool into a plating tank (7) filled with a plating solution (6), and performing micro-electroplating on the non-processing section of the carbon nano tube fiber (3) to form a uniform metal coating (11) on the surface of the carbon nano tube fiber, wherein the current density of electroplating is 10A/dm2, and the time is 10 min.
CN201711018428.9A 2017-10-26 2017-10-26 Method for preparing cathode of tool for cutting carbon nano tube fiber by micro electrolysis line Active CN107931756B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711018428.9A CN107931756B (en) 2017-10-26 2017-10-26 Method for preparing cathode of tool for cutting carbon nano tube fiber by micro electrolysis line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711018428.9A CN107931756B (en) 2017-10-26 2017-10-26 Method for preparing cathode of tool for cutting carbon nano tube fiber by micro electrolysis line

Publications (2)

Publication Number Publication Date
CN107931756A CN107931756A (en) 2018-04-20
CN107931756B true CN107931756B (en) 2019-12-06

Family

ID=61935709

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711018428.9A Active CN107931756B (en) 2017-10-26 2017-10-26 Method for preparing cathode of tool for cutting carbon nano tube fiber by micro electrolysis line

Country Status (1)

Country Link
CN (1) CN107931756B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108971679B (en) * 2018-08-29 2020-06-09 河海大学常州校区 Superfine wire electrode tensioning clamp with heat sensitive component
CN109455695A (en) * 2018-12-19 2019-03-12 深圳烯湾科技有限公司 Modified carbon nano-tube fiber and elastic composite and preparation method thereof
CN115041763B (en) * 2022-05-09 2023-12-29 南京航空航天大学 Preparation method of flexible carbon fiber composite electrode and application of flexible carbon fiber composite electrode in electrolytic machining
CN115041762A (en) * 2022-05-09 2022-09-13 南京航空航天大学 Preparation method and application of glass fiber flexible electrode

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU453272A1 (en) * 1972-03-22 1974-12-15 GUIDING DEVICE TO ELECTROIROSION MACHINE
CN2186616Y (en) * 1994-01-31 1995-01-04 张�林 Wire frame structure for wire-cutting machine
JP3518574B2 (en) * 1997-03-24 2004-04-12 ブラザー工業株式会社 Wire electric discharge machine
CN105081490A (en) * 2014-04-23 2015-11-25 北京富纳特创新科技有限公司 Linear-cutting electrode wire and linear-cutting device
CN106964855A (en) * 2017-02-15 2017-07-21 南京航空航天大学 A kind of asymmetric axial vibration assisted electrolysis wire cutting method of amplitude
CN107248456A (en) * 2017-04-26 2017-10-13 东莞市鸿愃实业有限公司 The preparation method of CNT yarn based flexible super capacitor combination electrode material

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101774050B (en) * 2010-03-22 2012-08-22 南京航空航天大学 Circulating wire cutting electrode system and processing method for electrolytic wire cutting

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU453272A1 (en) * 1972-03-22 1974-12-15 GUIDING DEVICE TO ELECTROIROSION MACHINE
CN2186616Y (en) * 1994-01-31 1995-01-04 张�林 Wire frame structure for wire-cutting machine
JP3518574B2 (en) * 1997-03-24 2004-04-12 ブラザー工業株式会社 Wire electric discharge machine
CN105081490A (en) * 2014-04-23 2015-11-25 北京富纳特创新科技有限公司 Linear-cutting electrode wire and linear-cutting device
CN106964855A (en) * 2017-02-15 2017-07-21 南京航空航天大学 A kind of asymmetric axial vibration assisted electrolysis wire cutting method of amplitude
CN107248456A (en) * 2017-04-26 2017-10-13 东莞市鸿愃实业有限公司 The preparation method of CNT yarn based flexible super capacitor combination electrode material

Also Published As

Publication number Publication date
CN107931756A (en) 2018-04-20

Similar Documents

Publication Publication Date Title
CN107931756B (en) Method for preparing cathode of tool for cutting carbon nano tube fiber by micro electrolysis line
EP1516076B1 (en) Process for electroplating metallic and metall matrix composite foils, coatings and microcomponents
CN103056463B (en) Manufacturing method for carbon nano tube tool electrode for micro electrochemical machining and multi-functional working tanks
Wüthrich et al. Physical principles and miniaturization of spark assisted chemical engraving (SACE)
Yeo et al. On the effects of ultrasonic vibrations on localized electrochemical deposition
Fan et al. The analysis and investigation on the microelectrode fabrication by electrochemical machining
CN1850411A (en) Micro-scale line electrode electrolysis machining method and micro-vibration line electrode system
Choi et al. Fabrication of WC micro-shaft by using electrochemical etching
WO2022104757A1 (en) Preparation method for cross-size micro-nano structure array
Meng et al. Wire electrochemical micromachining of metallic glass using a carbon nanotube fiber electrode
Jiang et al. Vibration-assisted wire electrochemical micromachining with a suspension of B 4 C particles in the electrolyte
CN108480805A (en) Micro-nano bubble assist is electrolysed wire-electrode cutting and processing method
Davydov et al. Electrochemical local maskless micro/nanoscale deposition, dissolution, and oxidation of metals and semiconductors (a review)
Biswal et al. Recent advances in energy field assisted hybrid electrodeposition and electroforming processes
CN108788352B (en) Wire electrode workpiece different-speed composite motion micro-electrolysis wire cutting machining method
Debnath et al. Wire electrochemical machining process: overview and recent advances
Meng et al. Helical carbon nanotube fiber tool cathode for wire electrochemical micromachining
CN112077402A (en) Electrolytic tool electrode and electrolytic finishing method for internal channel of workpiece by using same
CN104911643A (en) Method for electrodepositing nano-iron from iron oxide in choline chloride ionic liquid
Ming et al. Wear resistance of copper EDM tool electrode electroformed from copper sulfate baths and pyrophosphate baths
Liu et al. Tooling aspects of micro electrochemical machining (ECM) technology: design, functionality, and fabrication routes
CN106567106A (en) Additive-free method used for preparing high-mechanical-property electroformed copper layers at extremely low copper sulphate concentration
Wang et al. The fabrication of high-aspect-ratio cylindrical nano tool using ECM
CN105108250B (en) The method that flexibility prepares fine group's line electrode online
CN112831810B (en) Process for preparing micro-columnar structure by maskless localized electrodeposition method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant