CN106826391B - A method and device for electrostatically controllable jet cutting of nano-fluid oil film water droplets - Google Patents
A method and device for electrostatically controllable jet cutting of nano-fluid oil film water droplets Download PDFInfo
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- 239000010696 ester oil Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 29
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/10—Arrangements for cooling or lubricating tools or work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/10—Arrangements for cooling or lubricating tools or work
- B23Q11/1038—Arrangements for cooling or lubricating tools or work using cutting liquids with special characteristics, e.g. flow rate, quality
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- Engineering & Computer Science (AREA)
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- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The present invention discloses one of machining field nano-fluid oil film water droplet electrostatic controllable jet cutting process and device, coaxial nozzle connects the first micro-injection pump by the first silicone rubber tube, the second micro-injection pump is connected by the second silicone rubber tube, what the first micro-injection pump pumped out is water-based nano-fluid, what the second micro-injection pump pumped out is oil base nano-fluid, adjustable HV generator exports negative direct current high voltage to coaxial nozzle, in coaxial nozzle and cutter, high-voltage electrostatic field is established between workpiece, water-based nano-fluid and oil base nano-fluid stream are directly contacted with the coaxial nozzle with negative direct current high voltage, on lotus with the negative electrical charge of coaxial nozzle same polarity, converge to form nano-fluid oil film water droplet in the exit of nozzle discharge hole, effectively in conjunction with the excellent greasy property of the high cooling performance of water-based nano-fluid and oil base nano-fluid, Efficient cooling and lubricating implementable to cutting region realizes that nano-fluid oil film water droplet is controllably transported to the orientation of cutting region.
Description
Technical field
The invention belongs to machining fields, the device that specifically cutting zone of machining is cooled down and lubricated
And method.
Background technique
Machining is to obtain the main method of part, in the cutting process, removes the exhausted big portion of the consumed energy of material
Divide and be converted to cutting heat and concentrate on cutting zone, cause cutter high temperature, lead to cutter Fast Wearing, this is at a high speed, efficiently
Performance is more prominent when cutting.Common cooling provision is that the modes of a large amount of cutting fluids is poured to cutting region to reach and reduce cutting
Temperature extends cutter life and then improves the purpose of processing efficiency.However because cutter and chip, cutter and workpiece contact interface are deposited
In very high pressure, when so that being poured a large amount of cutting fluids to cutting region, it is able to enter cutting region and really plays cooling and lubricating
The cutting fluid of effect only accounts for minimum ratio, can not effectively be exchanged heat to cutting region, and largely can band using cutting fluid
It is increased substantially come part manufacturing cost, severe environmental pollution, the negative effect such as endanger health.
Currently, micro lubricating is that the compressed air of certain pressure is mixed and is atomized with micro lubricating oil, sprays to cutting and add
Work area is lubricated cutter and the contact surface of chip and cutter and workpiece, to reduce friction, while one kind of cooling cutting region
Near dry cutting technology, the elaioleucite that micro lubricating takes away cutting heat using compressed air jet and micro lubricating oil is atomized into exist
Cutting region, which is undergone phase transition, absorbs cutting heat to realize the direct cooling effect to cutting region, lubrication of the micro lubricating oil to cutting region
The friction between cutter and chip, workpiece can be also reduced, reduces the generation of frictional heat, and then realize the indirect cooling to cutting region
Effect.But specific heat and thermal coefficient due to gas are low and lubricating oil heat of gasification is small, and this cooling means can not be effectively reduced and cut
High temperature is cut, and cut high temperature lubricating oil can also evaporated and loses lubrication function.This problem adds in high-efficient cutting, especially hardly possible
It is showed in work material high-efficient cutting more prominent.In addition, compressed air is the driving of lubricating oil atomization injection in micro lubricating
Power and droplet delivery vehicles, droplet are moved uncontrollable, are easily drifted into air after spraying.This not only polluted working environment,
And so that operator is susceptible to suffer from respiratory disease and skin disease by respiration and skin contact, endanger its health.
It is currently the cooling and lubricating processing method using oil on water for the cooling and lubricating performance for improving micro lubricating,
Using micro degradable lubricating oil and a small amount of water under compressed air-driven effect, it is atomized and is formed in special multi-stage nozzle
The small water droplet of adsorption oil film, to machining area, water droplet absorbs cutting heat and vapour for injection under the action of pressure-air
Change, plays cooling effect, and oil film is then attached to cutter or workpiece surface forms lubricating film, plays lubrication and antifriction function.It should
Method improves radiating efficiency using water droplet vaporization heat absorption, is beneficial to the holding of strength of lubricant film, so that it is guaranteed that the lubrication of lubricating oil
Function.Although there is following defects: (1) oil film water droplet the method increase the cooling and lubricating effect of micro lubricating
Water flow needed for being formed is larger, is not able to satisfy the requirement of high efficiency, low energy consumption；(2) using pressure-air as oil film water-drop-shaped
At the power with conveying, oil film water droplet drifting into air equally will cause, it is unfavorable to generate to working environment and human health
Influence.
Nano-fluid is one kind by base fluid and the molecular two-phase suspension of nanoparticle, nanoparticle refers to having a size of 1 ~
The ultra-fine minute solid particles of 100nm mainly have metal, nonmetallic, oxygen applied to the nanoparticle among nano-fluid at present
Compound, nitride and carbide etc., base fluid mainly have deionized water, mineral oil, vegetable oil, ethylene glycol etc..It is thermally conductive because of solid
Coefficient is much higher than liquid and nanoparticle has low friction characteristic, and nanoparticle, which is added in base fluid, can obviously improve base fluid
Heat transfer property and antifriction performance, and compared with adding millimeter or micron order solids in a liquid, nanoparticle is due to small
The suspension stability of dimensional effect and Brownian movement in base fluid is more preferable, and many excellent characteristics of nano-fluid, which have become, to be changed
The novel cooling and lubricating medium of kind micro lubricating cooling and lubricating performance.China Patent No. is ZL201410229717.3, title is
Device disclosed in the document of " a kind of controllable nano fluid droplet be sprayed cutting process and device ", is built between nozzle and cutter
Vertical high-voltage electrostatic field, micro nano-fluid Charged atomization become Charged Droplet, and droplet is transported to cutting under the action of electric field force
Area implements cooling and lubricating to cutting region；By change the controllable nano-fluid droplet of electrostatic field between nozzle and cutter size,
Distribution and motion profile realize that droplet is controllably transported to the orientation of cutting region, so that droplet drifting in transmit process is reduced,
Although improving the cooling and lubricating performance of micro lubricating, while its environmental-protecting performance is also improved, due to only making in implementation process
It is cooling and lubricating medium with a kind of nano-fluid (water base or oil base), fails the high cooling performance and oil base of water-based nano-fluid
The excellent greasy property of nano-fluid organically combines, so that its cooling and lubricating performance still needs to further be promoted, to meet difficult processing
High request of the material high-efficient cutting to cooling and lubricating.
Summary of the invention
The purpose of the present invention is provide a kind of nano-fluid oil film water effectively to solve the above problem of the existing technology
Electrostatic controllable jet cutting apparatus and the controllable jet cutting process of the device are dripped, two kinds of fluids is used to be situated between as cooling and lubricating
Matter organically combines the excellent greasy property of the high cooling performance of water-based nano-fluid and oil base nano-fluid, improves cooling profit
Slip energy is able to satisfy difficult-to-machine material high-efficient cutting to the high request of cooling and lubricating.
To achieve the above object, a kind of nano-fluid oil film water droplet electrostatic controllable jet cutting apparatus of the present invention is using as follows
Technical solution: adjustable HV generator is connected by high-tension cable with coaxial nozzle, and coaxial nozzle passes through the first silicon rubber
Pipe connects the first micro-injection pump, connects the second micro-injection pump by the second silicone rubber tube, what the first micro-injection pump pumped out
It is water-based nano-fluid, what the second micro-injection pump pumped out is oil base nano-fluid.
The coaxial nozzle includes inner nozzle feed inlet, inner nozzle, outer nozzle, outer nozzle feed inlet and nozzle discharge hole,
It is equipped with step through-hole inside outer nozzle, inner nozzle is coaxially fixedly installed at the center of step through-hole, nozzle material-feeding mouth is coaxially fixed
Inner nozzle feed end is connected, inner nozzle discharge end and outer nozzle discharge end form nozzle discharge hole, at nozzle discharge hole, outer spray
There are annular spaces between mouth inner wall and inner nozzle outer wall；Be fixedly connected with outer nozzle feed inlet on outer nozzle side wall, outer nozzle into
Material mouth is connected with the step through-hole inside outer nozzle；First micro-injection pump is through the connection inner nozzle charging of the first silicone rubber tube
Mouthful, the second micro-injection pump connects outer nozzle feed inlet through the second silicone rubber tube.
The technology that the controllable jet cutting process of the nano-fluid oil film water droplet electrostatic controllable jet cutting apparatus uses
Scheme the following steps are included:
A, water-based nano-fluid and oil base nano-fluid, the water-base nano stream that the first micro-injection pump will prepare are prepared
Body is pumped out to inner nozzle feed inlet and is sent into inner nozzle, and the second micro-injection pump pumps out the oil base nano-fluid prepared to outer
Nozzle material-feeding mouth is sent into outer nozzle,
B, adjustable HV generator gives coaxial nozzle output negative direct current high voltage simultaneously, in coaxial nozzle and cutter, work
High-voltage electrostatic field is established between part；
C, water-based nano-fluid and oil base nano-fluid stream are directly contacted with the coaxial nozzle with negative direct current high voltage, on lotus with
The negative electrical charge of coaxial nozzle same polarity converges to form nano-fluid oil film water droplet in the exit of nozzle discharge hole, is transported to and cuts
Area is cut, heat caused by cutting is taken away and cutting region is lubricated.
Further, in step A, water-based nano-fluid is that nanoparticle is dispersed to the two-phase suspension formed in deionized water
Liquid, oil base nano-fluid are that nanoparticle is dispersed to the two-phase suspension formed in vegetalitas lubricating oil or ester oil；Nanoparticle
Size between 1 ~ 100nm, the mass fraction of nanoparticle is 0.1 ~ 1%.
Further, in step B, the angle α between the central axis of coaxial nozzle and the central axis of cutter is 30 ~ 40 degree,
On the central axis direction of coaxial nozzle, nozzle discharge hole to the minimum range between tool surface be spray distance be 20 ~
30mm。
Further, in step B, the voltage range of the negative direct current high voltage of adjustable HV generator output is 0 ~-
30kV, the voltage supplied to coaxial nozzle are -4 ~ -12kV.
The present invention is after adopting the above technical scheme, have the advantages that
1, water-based nano-fluid and oil base nano-fluid are formed into nano-fluid oil film water by coaxial electrostatic atomizing type
Drop, the charged nanosize being broken into using the water-based nano-fluid under high voltage electrostatic field and oil base nano-fluid through coaxial jet
Fluid oil film water drop carries out cooling and lubricating to cutting region, effectively in conjunction with the high cooling performance of water-based nano-fluid and oil base nanometer stream
The excellent greasy property of body, efficient cooling and lubricating implementable to cutting region.
2, nano-fluid oil film water droplet makees directed movement to cutting region under the action of electric field force, is charged by electric field controls
Nano-fluid oil film water droplet effectively reduces the drift of nano-fluid oil film water droplet in transmit process to the transmission process of cutting region
It scatters and disappears, not only improves working environment, but also improve the utilization rate of water-based nano-fluid and oil base nano-fluid.Further, since
Electrostatic induction principle, with the charges of different polarity to attract each other, this increase between nano-fluid oil film water droplet and cutter, workpiece surface
Attraction between nano-fluid oil film water droplet and cutter, workpiece reduces nano-fluid oil film droplets impact cutting region wall surface
When rebound and splashing, improve deposition.
3, by changing the high-voltage electrostatic field between coaxial nozzle and cutter, workpiece, water base and oil base nano-fluid flow can
The size for regulating and controlling nano-fluid oil film water droplet, including regulate and control the diameter of nano-fluid oil film water droplet, nano-fluid oil film thickness and
Diameter, distribution and the movement of nano-fluid water droplet realize that nano-fluid oil film water droplet is controllably transported to the orientation of cutting region, thus
Different cooling and lubricating performances is obtained, cutting material and cutting data changeable under modern mixes line production mode are adapted to.
4, compared with the existing pneumatic generation type of oil film water droplet, nano-fluid oil film water droplet of the present invention forms required water
Base nano-fluid flow greatly reduces, while device is simple.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of nano-fluid oil film water droplet electrostatic controllable jet cutting apparatus of the present invention；
Fig. 2 is the structure sectional view that coaxial nozzle amplifies in Fig. 1；
Fig. 3 is that coaxial nozzle in Fig. 1, the structural schematic diagram of cutter and workpiece amplification and geometric dimension are marked on a map；
In figure: 1. adjustable HV generators；2. high-tension cable；3. the first micro-injection pump；4. the first silicone rubber tube；
5. the second micro-injection pump；6. the second silicone rubber tube；7. coaxial nozzle；8. cutter；9. workpiece；10. conducting wire；11. inner nozzle into
Material mouth；12. end cap；13. inner nozzle；14. outer nozzle；15. outer nozzle feed inlet；16. nozzle discharge hole.
Specific embodiment
As shown in Figure 1, a kind of nano-fluid oil film water droplet electrostatic controllable jet cutting apparatus of the present invention includes adjustable high pressure
Electrostatic generator 1, high-tension cable 2, the first micro-injection pump 3, the first silicone rubber tube 4, the second micro-injection pump 5, the second silicon rubber
Sebific duct 6, coaxial nozzle 7, cutter 8, workpiece 9 and conducting wire 10.
Adjustable HV generator 1 is connected by high-tension cable 2 with coaxial nozzle 7, and it is negative to provide direct current to coaxial nozzle 7
High pressure.The cathode output end of adjustable HV generator 1 is grounded by conducting wire 10, and cutter 8 and workpiece 9 are connect indirectly by lathe
Ground, the material of cutter 3 are hard alloy or high-speed steel, and the material of workpiece 9 is metal.
Coaxial nozzle 7 connects the first micro-injection pump 3 by the first silicone rubber tube 4, while being connected by the second silicone rubber tube 6
Connect the second micro-injection pump 5.First micro-injection pump 3 pumps out water-based nano-fluid, and the second micro-injection pump 5 pumps out oil base nanometer
Fluid, water-based nano-fluid and oil base nano-fluid enter coaxial nozzle 7 simultaneously, what the nozzle discharge hole of coaxial nozzle 7 sprayed
It is nano-fluid oil film water droplet.
As shown in Fig. 2, coaxial nozzle 7 includes inner nozzle feed inlet 11, end cap 12, inner nozzle 13, outer nozzle 14, outer nozzle
Feed inlet 15 and nozzle discharge hole 16.Step through-hole is equipped with inside outer nozzle 14, the step through-hole at nozzle discharge hole 16 is
Aperture, rest part are macropores.Inner nozzle 13 is coaxially fixedly installed at the center of step through-hole, 13 feed end of inner nozzle is coaxial
It is fixedly connected with inner nozzle feed inlet 11.Outer nozzle 14 is threadably secured one end cap 12 of connection, it is ensured that inner nozzle 13 sprays outside
There is fixed position in mouth 14.Nozzle material-feeding mouth 11 protrudes into outer nozzle 14 by the centre bore of end cap 12 from the outside of outer nozzle 14
13 feed end of inner nozzle is fixedly and coaxially connected behind inside, 13 discharge end of inner nozzle and 14 discharge end of outer nozzle form nozzle discharge hole
16.At nozzle discharge hole 16, the hole diameter of the step through-hole in outer nozzle 14 is greater than the outer diameter of inner nozzle 13, outer nozzle 14
In the hole diameter of step through-hole be 0.7 ~ 2mm, the internal diameter of inner nozzle 13 is 0.2 ~ 0.6mm, also, the inner wall of outer nozzle 14
And there are annular spaces between nozzle discharge hole 16 for the outer wall of inner nozzle 13.
An outer nozzle feed inlet 15, outer nozzle feed inlet 15 and outer nozzle 14 are fixedly connected on the side wall of outer nozzle 14
Between pass through thread seal connect.The central axis of outer nozzle feed inlet 15 and the central axis of outer nozzle 14, inner nozzle 13 are perpendicular.
Outer nozzle feed inlet 15 is connected with the macropore of the step through-hole inside outer nozzle 14.
In conjunction with Fig. 1 and 2, the first micro-injection pump 3 connects inner nozzle feed inlet 11 through the first silicone rubber tube 4, and second is micro
Syringe pump 5 connects outer nozzle feed inlet 15 through the second silicone rubber tube 6.Adjustable HV generator 1 provides directly to coaxial nozzle 7
Flow negative high voltage, inner nozzle 13 and the negative direct current high voltage having the same of outer nozzle 14.
As shown in figure 3, the angle α between the central axis of coaxial nozzle 7 and the central axis of cutter 8 is 30 ~ 40 degree, coaxial
On the central axis direction of nozzle 7, nozzle discharge hole 16 to the minimum range between 8 surface of cutter of coaxial nozzle 7 is jet length
It is 20 ~ 30mm from D, spray distance D.
When nano-fluid oil film water droplet electrostatic controllable jet cutting apparatus works, first have to prepare water-based nano-fluid and oil
Base nano-fluid.Water-based nano-fluid is that nanoparticle is dispersed to the two-phase suspension formed in deionized water.Oil base nanometer stream
Body is that nanoparticle is dispersed to the two-phase suspension formed in vegetalitas lubricating oil or ester oil.By nanoparticle and deionized water or
After vegetalitas lubricating oil or ester oil are mixed in a certain ratio, through ultrasonic vibration, two-phase suspension is obtained.Nanoparticle uses graphite
Or the solid nanoparticles of diamond or carbon nanotubes.The size of nanoparticle is between 1 ~ 100nm, the quality point of nanoparticle
Number is 0.1 ~ 1%.
Adjustable HV generator 1 provides negative direct current high voltage to coaxial nozzle 7, in coaxial nozzle 7 and cutter 8, workpiece 9
Between establish high-voltage electrostatic field.The voltage range for the negative direct current high voltage that adjustable HV generator 1 exports is 0 ~ -30kV, is led to
Crossing after high-tension cable 2 to 7 service voltage of coaxial nozzle is -4 ~ -12kV.According to electrostatic induction principle, in 9 table of cutter 8 and workpiece
Face induce with the opposite polarity positive charge of coaxial nozzle 7, and between coaxial nozzle 7 and cutter 8, workpiece 9 formed high pressure it is quiet
Electric field.Meanwhile first micro-injection pump 3 water-based nano-fluid prepared is pumped out to the first silicone rubber tube 4, through the first silicon rubber
Sebific duct 4 and inner nozzle feed inlet 11, which are sent into inner nozzle 13, makes 1 ~ 10ml/ of flow of water-based nano-fluid during transportation
h.Meanwhile second micro-injection pump 5 the oil base nano-fluid prepared is pumped out to the second silicone rubber tube 6, through the second silicon rubber
Pipe 6 and outer nozzle feed inlet 15 are sent into outer nozzle 14, during transportation, make 2 ~ 15ml/ of flow of oil base nano-fluid
h.In this way, water base and oil base nano-fluid flows through coaxial nozzle 7, directly contacted with the coaxial nozzle 7 with negative direct current high voltage, on lotus
With the negative electrical charge of 7 same polarity of coaxial nozzle.Water-based nano-fluid is flowed out from inner nozzle 13, and oil base nano-fluid is from inner nozzle 13
It is flowed out in annular spaces between outer nozzle 14, converging to be formed in the exit of the nozzle discharge hole 16 of coaxial nozzle 7 has
The composite droplet of core-shell structure.Because the electrostatic relaxation time of water-based nano-fluid is much smaller than oil base nano-fluid, negative electrical charge is main
It is distributed on stratum nucleare water-based nano-fluid surface, that is, the interface between stratum nucleare water-based nano-fluid and shell oil base nano-fluid
On.The electrostatic relaxation time is that charged required time, calculation formula are as follows in the electric field for drop:
,
In formula:Electrostatic relaxation time, unit s；The relative dielectric constant of liquid；Permittivity of vacuum, it is single
Position F/m；KThe conductivity of liquid, unit S/m.
When electric field strength reaches certain value, the boundary of stratum nucleare water-based nano-fluid and shell oil base nano-fluid is acted on
Electric field force on face overcomes interfacial tension, and stratum nucleare water-based nano-fluid is made to form stable jet stream, meanwhile, it is acted in interfacial viscosity
Under, shell oil base nano-fluid flows together in company with stratum nucleare water-based nano-fluid forms coaxial jet.Coaxial jet end is broken
Atomization, forms electronegative nano-fluid oil film water droplet.Electronegative nano-fluid oil film water droplet is by 7 homophilic charge of coaxial nozzle
Repulsion, and the attraction by the 9 surface charges of different polarity of cutter 8 and workpiece is transported to cutting region under the action of electric field force.When
When nano-fluid oil film water drop contact cutter 8 or 9 surface of workpiece, the nano-fluid oil film for being attached to nano-fluid water drops surface is broken
It splits, the nano-fluid water droplet for losing nano-fluid oil film package boils and vaporizes in the case where cutting high temperature action, takes away cutting and generates
Amount of heat；The nanoparticle and nano-fluid oil film left after nano-fluid water droplet fast vaporizing is attached to cutter 8 or work
9 surface of part reduces cutting contact interface friction, to realize the efficient cooling and lubricating to cutting region.
Claims (5)
1. a kind of nano-fluid oil film water droplet electrostatic controllable jet cutting apparatus, adjustable HV generator (1) pass through high pressure
Cable (2) is connected with coaxial nozzle (7), it is characterized in that: coaxial nozzle (7) is micro by the first silicone rubber tube (4) connection first
Syringe pump (3) connects the second micro-injection pump (5) by the second silicone rubber tube (6), and what the first micro-injection pump (3) pumped out is
Water-based nano-fluid, what the second micro-injection pump (5) pumped out is oil base nano-fluid；Coaxial nozzle (7) includes inner nozzle charging
Mouth (11), inner nozzle (13), outer nozzle (14), outer nozzle feed inlet (15) and nozzle discharge hole (16), outer nozzle (14) are internal
It is coaxially fixedly installed equipped with step through-hole, at the center of step through-hole inner nozzle (13), inner nozzle feed inlet (11) is coaxially fixed
Inner nozzle (13) feed end is connected, inner nozzle (13) discharge end and outer nozzle (14) discharge end form nozzle discharge hole (16),
At nozzle discharge hole (16), there are annular spaces between outer nozzle (14) inner wall and inner nozzle (13) outer wall；Outer nozzle (14) side
It is fixedly connected on wall outer nozzle feed inlet (15), outer nozzle feed inlet (15) step through-hole internal with outer nozzle (14) is connected
It is logical；First micro-injection pump (3) connects inner nozzle feed inlet (11) through the first silicone rubber tube (4), the second micro-injection pump (5) warp
Second silicone rubber tube (6) connects outer nozzle feed inlet (15)；The central axis and outer nozzle (14), interior spray of outer nozzle feed inlet (15)
The central axis of mouth (13) is perpendicular；Step through-hole of the outer nozzle (14) at nozzle discharge hole (16) is aperture, and rest part is
Macropore, the hole diameter of step through-hole are 0.7~2mm, and the internal diameter of inner nozzle (13) is 0.2~0.6mm.
2. a kind of controllable jet cutting side of nano-fluid oil film water droplet electrostatic controllable jet cutting apparatus as described in claim 1
Method, it is characterized in that the following steps are included:
A, water-based nano-fluid and oil base nano-fluid, the water-base nano stream that the first micro-injection pump (3) will prepare are prepared
Body is pumped out to inner nozzle feed inlet (11) and is sent into inner nozzle (13), the oil base nanometer that the second micro-injection pump (5) will prepare
Fluid is pumped out to outer nozzle feed inlet (15) and is sent into outer nozzle (14),
B, adjustable HV generator (1) gives coaxial nozzle (7) output negative direct current high voltage simultaneously, in coaxial nozzle (7) and knife
Tool (8), workpiece establish high-voltage electrostatic field between (9)；
C, water-based nano-fluid and oil base nano-fluid stream are directly contacted with the coaxial nozzle (7) with negative direct current high voltage, on lotus with
The negative electrical charge of coaxial nozzle (7) same polarity, water-based nano-fluid outflow from the inner nozzle (13), oil base nano-fluid is from inner nozzle
(13) it is flowed out in the annular spaces between outer nozzle (14), converges to be formed with nucleocapsid in the exit of nozzle discharge hole (16)
The composite droplet of structure, is transported to cutting region, takes away heat caused by cutting and lubricates cutting region.
3. the controllable jet cutting side of nano-fluid oil film water droplet electrostatic controllable jet cutting apparatus according to claim 2
Method, it is characterized in that: water-based nano-fluid is that nanoparticle is dispersed to the two-phase suspension formed in deionized water in step A, oil
Base nano-fluid is that nanoparticle is dispersed to the two-phase suspension formed in vegetalitas lubricating oil or ester oil；The size of nanoparticle
Between 1~100nm, the mass fraction of nanoparticle is 0.1~1%.
4. the controllable jet cutting side of nano-fluid oil film water droplet electrostatic controllable jet cutting apparatus according to claim 2
Method, it is characterized in that: the angle α between the central axis of coaxial nozzle (7) and the central axis of cutter (8) is 30~40 in step B
Degree, on the central axis direction of coaxial nozzle (7), nozzle discharge hole (16) to the spray distance between cutter (8) surface is 20
~30mm.
5. the controllable jet cutting side of nano-fluid oil film water droplet electrostatic controllable jet cutting apparatus according to claim 2
Method, it is characterized in that: in step B, the voltage range of the negative direct current high voltage of adjustable HV generator (1) output is 0~-
30kV, the voltage supplied to coaxial nozzle (7) are -4~-12kV.
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| CN110096777B (en) * | 2019-04-22 | 2023-04-18 | 江苏科技大学 | Electrostatic atomization milling droplet transportation modeling and transportation effect evaluation method |
| CN110449981B (en) * | 2019-07-04 | 2021-10-29 | 汇专科技集团股份有限公司 | Composite spray micro-lubricating cooling system |
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