CN110564487A - method for preparing green nano cutting fluid by combining cycloidal ultrasonic stirring with alternating electric field - Google Patents
method for preparing green nano cutting fluid by combining cycloidal ultrasonic stirring with alternating electric field Download PDFInfo
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- CN110564487A CN110564487A CN201910807993.6A CN201910807993A CN110564487A CN 110564487 A CN110564487 A CN 110564487A CN 201910807993 A CN201910807993 A CN 201910807993A CN 110564487 A CN110564487 A CN 110564487A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M173/00—Lubricating compositions containing more than 10% water
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/04—Elements
- C10M2201/041—Carbon; Graphite; Carbon black
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/08—Inorganic acids or salts thereof
- C10M2201/081—Inorganic acids or salts thereof containing halogen
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/40—Fatty vegetable or animal oils
- C10M2207/402—Castor oils
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/12—Polysaccharides, e.g. cellulose, biopolymers
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Abstract
the invention discloses a method for preparing green nano cutting fluid by combining cycloidal ultrasonic stirring with an alternating electric field. The agglomeration phenomenon of the solution after the existing ultrasonic stirring is not completely solved. The cycloidal ultrasonic vibration stirring rod realizes the combined action of cycloidal stirring of the ultrasonic vibration stirring rod, ultrasonic pulse and alternating pulse; when the temperature of the cutting fluid pre-mixed liquid measured by the temperature sensor exceeds 60 ℃, the ultrasonic vibration stirring rod stops vibrating, the alternating electric fields of the two arc electrodes continue to work, the normal-temperature water flow in the water cooling channel is increased, the ultrasonic vibration stirring rod is powered again when the temperature of the cutting fluid pre-mixed liquid to be measured is reduced to the normal temperature, and the flow of the normal-temperature water in the water cooling channel is reduced; and after periodic stirring, closing the ultrasonic pulse power supply and the alternating pulse power supply, and cooling the cutting fluid pre-mixed liquid to normal temperature by normal-temperature water in the water cooling channel to obtain the green nano cutting fluid. The green nano cutting fluid prepared by the invention is homogeneous and stable, and the agglomeration and coalescence properties are weakened.
Description
Technical Field
the invention belongs to the technical field of metal working fluids, and particularly relates to a method for preparing a green nano cutting fluid by combining cycloidal ultrasonic stirring with an alternating electric field.
Background
the metal cutting fluid is an industrial fluid used in the metal cutting process, can play roles of lubrication, cooling, rust prevention and the like, can effectively prolong the service life of a tool, and has important role in mechanical engineering. However, the traditional mineral oil-based cutting fluid has the problem of great harm to human and environment, so that the development of vegetable oil substitution which is easy to degrade and less in pollution to form green cutting fluid becomes the development trend of the current cutting fluid. The nano technology is applied to the technical field of cutting, and the green nano cutting fluid can be formed by utilizing the good thermal conductivity and the micro ball effect of the nano particles so as to further improve the heat transfer, friction reduction and wear resistance of the cutting fluid. However, because the green nano cutting fluid is added with the components of the nano particles, an agglomeration phenomenon also exists in the preparation process, and the agglomeration phenomenon of the green nano cutting fluid can seriously influence the function realization of the cutting fluid, so that the green nano cutting fluid cannot well dissipate heat and lubricate.
After ultrasonic stirring is added in a traditional stirring mode, the agglomeration phenomenon of the green nano cutting fluid is solved to a certain degree, but the agglomeration phenomenon of the solution after ultrasonic stirring is not completely solved, and the agglomeration phenomenon still exists.
disclosure of Invention
The invention aims to provide a method for preparing green nano cutting fluid by combining cycloidal ultrasonic stirring with an alternating electric field, which prepares homogeneous stable green nano cutting fluid by utilizing the principle that ultrasonic waves and the alternating electric field act simultaneously and selecting a proper motion trajectory; the agglomeration phenomenon of the prepared green nano cutting fluid basically disappears, so that the dispersion scale of the green nano cutting fluid can be reduced, and the dispersion uniformity of the green nano cutting fluid can be improved.
the invention specifically comprises the following steps:
The first step is as follows: placing the organic glass container on a section bar frame; the bottom of the organic glass container is provided with a shock pad; an integrally formed cylindrical upright column is arranged at the center of the organic glass container; the ultrasonic vibration stirring rod is arranged in the organic glass container; the two arc electrodes are symmetrically arranged on the inner wall of the organic glass container and are connected with an alternating pulse power supply through leads; pouring the cutting fluid pre-mixed liquid into an organic glass container; starting a servo motor, simultaneously connecting an ultrasonic vibration stirring rod with an ultrasonic pulse power supply by a temperature control device, and turning on an alternating pulse power supply for supplying power to two arc-shaped electrodes; the servo controller controls the rotating speed of the servo motor; the driving force of the servo motor is transmitted to the driving shaft through the coupling, and the driving shaft is supported in the cylindrical stand column of the organic glass container through the bearing; the driving shaft drives a driving gear fixed on the driving shaft to rotate; because the gear ring is fixed on the profile frame, the driven gear rotates around the driving gear when meshed with the driving gear and the gear ring; moreover, the ultrasonic vibration stirring rod is eccentrically fixed on the driven gear, and the driven gear drives the ultrasonic vibration stirring rod to rotate around the center of the driven gear while rotating, so that the physical stirring of the ultrasonic vibration stirring rod in the organic glass container is realized; meanwhile, due to the combined action of the ultrasonic pulse and the alternating pulse, the compound action of cycloidal ultrasonic stirring and an alternating electric field is realized in a stirring area.
The second step is that: circulating stirring
The ultrasonic vibration stirring rod rotates periodically along with the driven gear to form periodic stirring, one stirring period is 10-15 minutes, and the stirring is circulated for 5-10 times. In every stirring period, when temperature sensor surveyed the temperature of the leading mixed liquid of cutting fluid in the organic glass container and exceeded 60 ℃, temperature control device automatic cutout ultrasonic vibration stirring rod's power supply, stop vibrating, only carry out the physics stirring, and the alternating electric field of two arc electrodes continues to keep working, increase the flow of the normal atmospheric temperature water that sets up in the water-cooling passageway of organic glass container outer wall and bottom simultaneously, the temperature that awaits measuring the leading mixed liquid of cutting fluid reduces to supplying power to the ultrasonic vibration stirring rod again when the normal atmospheric temperature, carry out the ultrasonic vibration stirring, reduce the flow of the normal atmospheric temperature water in the water-cooling passageway simultaneously.
The third step: and after stirring, closing the ultrasonic pulse power supply and the alternating pulse power supply, standing, and cooling the cutting fluid pre-mixed liquid in the organic glass container to normal temperature by using normal-temperature water in the water cooling channel to obtain the homogeneous green nano cutting fluid.
Furthermore, the bearing is axially limited through a bearing cover.
further, the base of the servo motor is fixed on the section bar frame through a motor frame.
Furthermore, the driven gear is provided with a plurality of mounting holes which are arranged in an Archimedes spiral line according to the arrangement rule, and the ultrasonic vibration stirring rod is fixed at the mounting hole which is arranged at the penultimate position away from the center of the driven gear.
Further, the distance d between the center of each mounting hole and the center of the driven gear is a + b theta, wherein a is the distance between the center of the mounting hole closest to the center of the driven gear and the center of the driven gear, and b is a coefficient greater than or less than r; and recording the connecting line of the center of the mounting hole closest to the center of the driven gear and the center of the driven gear as a line segment A, wherein theta is the angle required by the line segment A rotating to the connecting line of the center of the mounting hole provided with the ultrasonic vibration stirring rod and the center of the driven gear along the Archimedes spiral direction.
Further, if the radius of the gear ring is R, the radius of the driven gear is R, and the rotational angular velocity is ω, the trajectory of the center of the ultrasonic vibration stirring rod in the coordinate system xoy is:
Wherein t is the operating time of the servo motor.
Further, because two arc electrodes take the heterogeneous electric charge of equivalent, the electric field intensity between two points that the position corresponds and the interval is d on two arc electrodes is:
Wherein, U is the voltage of the alternating pulse power supply.
further, the arc-shaped electrode is made of brass.
Further, the pulse frequency of the ultrasonic pulse power supply is 20-50 kHz, and the power is 400-600W; the voltage of the alternating pulse power supply is 40-60V, and the pulse frequency is 100-200 kHz.
Further, the cutting fluid pre-mixed liquid is prepared as follows: firstly, mixing castor oil, chitin and nano-scale diamond powder in a mass ratio of 1 (0.5-2.5) to 0.25-1 in an organic glass container, mixing the obtained solution with deionized water in a mass ratio of 1 (5-20), and finally adding no more than 5g of sodium chloride crystal to obtain the cutting fluid pre-mixed solution.
The invention has the following beneficial effects:
The green nano homogeneous cutting fluid prepared by the invention is a mixed solution with nano-scale diamond powder and micro-nano-scale oil drops, is stable in solution homogeneity, and has a good application prospect in the cutting processing industry. The stirring path designed by the invention can ensure that the ultrasonic vibration stirring rod regularly moves, and the moving vibration source is beneficial to all-around full mixing under the path planning, so that the stirring effect on the cutting fluid is better; the alternating electric field design of the invention ensures that when the nano particles and the micro oil drops contact the arc electrodes, the particles and the oil drops are polarized to form a charged body, and the electric field intensity distribution in the area between the two arc electrodes is uneven, the coulomb force borne by the charged body is changed at any time, and the direction of the electric field is also changed periodically, so that the resultant force of the nano particles and the micro oil drops under the actions of dipole acting force, coulomb force, motion resistance, gravity and the like is not zero, the moving characteristic between the nano particles and the micro oil drops is enhanced, and the agglomeration and coalescence performances are weakened.
Drawings
FIG. 1 is a cross-sectional view of the apparatus of the present invention;
FIG. 2 is a schematic view of the meshing relationship between the ring gear, the driving gear and the driven gear in the present invention;
FIG. 3-1 is a schematic view of an envelope curve drawn through the center of an ultrasonically vibrating stirring rod when the ultrasonically vibrating stirring rod is secured in a mounting hole closest to the center of a driven gear;
FIG. 3-2 is a schematic view of an envelope curve drawn by the center of an ultrasonically-vibratable stirring rod when the ultrasonically-vibratable stirring rod is fixed at a mounting hole next to the center of a driven gear at a distance of the penultimate mounting hole;
FIG. 4 is a schematic diagram of the power supply and electric field intensity distribution of two arc electrodes according to the present invention;
FIG. 5 is a graph showing a comparison of cutting forces in a broaching experiment using different types of cutting fluids according to three embodiments of the present invention and the application of dry cutting and conventional commercial oil;
FIG. 6 is a graph showing a comparison of cutting forces in different ultrasonic stirring modes in a broaching experiment.
in the figure: 1. the section bar frame, 2, servo motor, 3, motor frame, 4, shaft coupling, 5, shock pad, 6, drive shaft, 7, arc electrode, 8, water-cooling passageway, 9, organic glass container, 10, bearing cap, 11, ring gear, 12, drive gear, 13, driven gear, 14, ultrasonic vibration stirring rod, 15, temperature sensor.
Detailed Description
The invention is further illustrated by the following figures and examples.
the method for preparing the green nano cutting fluid by combining cycloidal ultrasonic stirring with an alternating electric field comprises the following specific steps:
The first step is as follows: as shown in fig. 1, the plexiglass container 9 is placed on the profile rack 1; the bottom of the organic glass container 9 is provided with a shock pad 5; an integrally formed cylindrical upright post is arranged at the center of the organic glass container 9; the ultrasonic vibration stirring rod 14 is arranged in the organic glass container 9; the two arc electrodes 7 are symmetrically arranged on the inner wall of the organic glass container 9 and are connected with an alternating pulse power supply through leads; pouring the cutting fluid pre-mixed liquid into an organic glass container 9; starting the servo motor 2, simultaneously connecting the ultrasonic vibration stirring rod 14 with an ultrasonic pulse power supply by the temperature control device, and turning on an alternating pulse power supply for supplying power to the two arc-shaped electrodes 7; wherein, the base of the servo motor 2 is fixed on the section bar frame 1 through the motor frame 3; the servo controller controls the rotating speed of the servo motor 2; the driving force of the servo motor 2 is transmitted to a driving shaft 6 through a coupling 4, the driving shaft is supported in a cylindrical upright post of an organic glass container 9 through a bearing, and the bearing is axially limited through a bearing cover 10; the driving shaft drives a driving gear 12 fixed on the driving shaft 6 to rotate; because the gear ring 11 is fixed on the profile frame 1, the driven gear 13 rotates around the driving gear 12 when meshed with the driving gear 12 and the gear ring simultaneously; because the ultrasonic vibration stirring rod 14 is eccentrically fixed on the driven gear 13, the driven gear 13 drives the ultrasonic vibration stirring rod 14 to rotate around the center of the driven gear 13 while rotating, thereby realizing the physical stirring of the ultrasonic vibration stirring rod 14 in the organic glass container 9; meanwhile, due to the action of the ultrasonic pulse and the alternating pulse, the compound action of cycloidal ultrasonic stirring and an alternating electric field is realized in the stirring area. Wherein, the ultrasonic vibration stirring rod 14 generates ultrasonic cavitation while stirring, so as to further refine the pre-mixed liquid mixed by different substances; the electric field intensity in the arc-shaped area of the arc-shaped electrode 7 is not uniform, the nano particles or the micro oil drops close to the arc-shaped electrode 7 are easily polarized, and the resultant force of the forces (including dipole acting force, coulomb force, motion resistance and gravity) of the polarized nano particles or the oil drops in different electric field intensities is not zero, so that the acting force between the nano particles and the oil drops in the electric field can further accelerate the motion, and the agglomeration effect of the nano particles and the coalescence effect of the oil drops are further destroyed. Because the temperature can rise in the stirring process, the performance of the green nano cutting fluid can be influenced by overhigh temperature, and the temperature of the cutting fluid pre-mixed liquid in the organic glass container 9 needs to be monitored in real time by using the temperature sensor 15.
The second step is that: circulating stirring
The ultrasonic vibration stirring rod 14 rotates along with the driven gear 13 periodically to form periodic stirring, wherein one stirring period is 10-15 minutes (in the following embodiments, 10 minutes are used for one stirring period), and 5-10 times are circulated (in the following embodiments, 10 times are used for all stirring periods, and the stirring speed of the ultrasonic vibration stirring rod 14 in the following embodiments is set to 120 r/min). In each stirring period, when the temperature of the cutting fluid pre-mixed liquid is measured to exceed 60 ℃, the temperature control device automatically cuts off the power supply of the ultrasonic vibration stirring rod 14, stops vibrating, only carries out physical stirring, the alternating electric fields of the two arc electrodes 7 continue to work, meanwhile, the flow of the normal temperature water in the water cooling channel 8 arranged on the outer wall of the organic glass container 9 and at the bottom is increased, the temperature of the cutting fluid pre-mixed liquid to be measured is reduced to the normal temperature, the ultrasonic vibration stirring is carried out, and meanwhile, the flow of the normal temperature water in the water cooling channel 8 is reduced.
the third step: and after stirring, closing the ultrasonic pulse power supply and the alternating pulse power supply, standing, and cooling the cutting fluid pre-mixed liquid in the organic glass container 9 to normal temperature by using normal-temperature water in the water cooling channel 8 to obtain the homogeneous green nano cutting fluid.
Further, as shown in fig. 2, the driven gear 13 is provided with a plurality of mounting holes which are arranged regularly in an archimedean spiral, that is, the distance d between the center of each mounting hole and the center of the driven gear 13 is a + b θ, where a is the distance between the center of the mounting hole closest to the center of the driven gear 13 and the center of the driven gear 13, and b is a coefficient greater than 0 and smaller than r; recording the connecting line of the center of the mounting hole closest to the center of the driven gear 13 and the center of the driven gear 13 as a line segment A, wherein theta is the angle required by the line segment A rotating to the connecting line of the center of the mounting hole provided with the ultrasonic vibration stirring rod 14 and the center of the driven gear 13 along the Archimedes spiral direction; if the radius of the gear ring 11 is R, the radius of the driven gear 13 is R, and the rotational angular velocity is ω, the trajectory traced by the center of the ultrasonic vibration stirring rod 14 in the coordinate system xoy is:
Where t is the operating time of the servo motor 2.
The envelope of the trace traced by the center of the ultrasonic vibration stirring rod 14 when the ultrasonic vibration stirring rod 14 is fixed at the mounting hole closest to the center of the driven gear 13 is shown in fig. 3-1, and the envelope of the trace traced by the center of the ultrasonic vibration stirring rod 14 when the ultrasonic vibration stirring rod 14 is fixed at the mounting hole which is the second to last from the center of the driven gear 13 (the ultrasonic vibration stirring rod 14 is fixed at the mounting hole in the following embodiment) is shown in fig. 3-2.
Further, as shown in fig. 4, the arc-shaped electrodes 7 are made of brass, and the two arc-shaped electrodes 7 carry the same amount of different charges, so that the electric field intensity between two points corresponding to each other in position and having a distance d on the two arc-shaped electrodes 7 is:
Wherein, U is the voltage of the alternating pulse power supply; the electric field strength solving formula is solved according to the electric field strength between two parallel electrode plates with the distance d after the arc electrode is approximated to an infinite number of parallel electrode plates. It can be seen that the closer the two points on the two arc electrodes 7 are, the higher the electric field intensity is, and the higher the electric field line density is.
example 1:
(1) The cutting fluid pre-mixed liquid is prepared as follows:
Mixing 1 part by mass of castor oil, 0.5 part by mass of chitin and 0.25 part by mass of nano-scale diamond powder in an organic glass container 9, adding 8.75 parts by mass of deionized water in the organic glass container 9, mixing, and finally adding 2g of sodium chloride crystals in the organic glass container 9, and mixing to obtain a cutting fluid pre-mixed solution. In the embodiment, 50g of castor oil, 25g of chitin, 12.5g of nano diamond powder, 437.5g of deionized water and 2g of sodium chloride crystals are adopted.
(2) setting parameters of the compound action of cycloidal ultrasonic stirring and alternating electric field:
the pulse frequency of the ultrasonic pulse power supply is set to be 20kHz, and the power is set to be 400W; the voltage of the alternating pulse power supply was 40V and the pulse frequency was 100 kHz.
Example 2:
(1) The cutting fluid pre-mixed liquid is prepared as follows:
Mixing 1 part by mass of castor oil, 2.5 parts by mass of chitin and 1 part by mass of nano-scale diamond powder in an organic glass container 9, adding 90 parts by mass of deionized water into the organic glass container 9 for mixing, and finally adding 5g of sodium chloride crystals into the organic glass container 9 for mixing to obtain the cutting fluid pre-mixed solution. In the embodiment, 50g of castor oil, 125g of chitin, 50g of nano diamond powder, 4.5kg of deionized water and 5g of sodium chloride crystals.
(2) Setting parameters of the compound action of cycloidal ultrasonic stirring and alternating electric field:
The pulse frequency of the ultrasonic pulse power supply is set to be 50kHz, and the power is set to be 600W; the voltage of the alternating pulse power supply is 60V, and the pulse frequency is 200 kHz.
Example 3:
(1) The cutting fluid pre-mixed liquid is prepared as follows:
mixing 1 part by mass of castor oil, 1 part by mass of chitin and 0.5 part by mass of nano-scale diamond powder in an organic glass container 9, adding 25 parts by mass of deionized water into the organic glass container 9 for mixing, and finally adding 1g of sodium chloride crystal into the organic glass container 9 for mixing to obtain the cutting fluid pre-mixed solution. In the embodiment, 50g of castor oil, 50g of chitin, 25g of nano diamond powder, 1.25kg of deionized water and 1g of sodium chloride crystal.
(2) setting parameters of the compound action of cycloidal ultrasonic stirring and alternating electric field:
The pulse frequency of the ultrasonic pulse power supply is set to be 30kHz, and the power is set to be 500W; the voltage of the alternating pulse power supply is 50V, and the pulse frequency is 150 kHz.
the green nano cutting fluid prepared in the three examples is applied to a broaching experiment, the change of the broaching cutting force is monitored in real time, and the cutting force comparison of the three examples with dry cutting and cutting by applying the conventional commercial oil is shown in fig. 5. Therefore, compared with dry cutting and commercial oil cutting, the green nano cutting fluid prepared in the three examples has the advantages that the broaching cutting force is reduced when the green nano cutting fluid is applied to a broaching experiment, and the reduction effect of the green nano cutting fluid in the example 3 is optimal.
the comparison of the broaching cutting force when applied to the broaching experiment of the green nano-cutting fluid prepared in example 3 with the green nano-cutting fluid prepared in the three comparative examples after changing the stirring mode in example 3 is shown in fig. 6, wherein the first comparative example adopts an ultrasonic fixed-point stirring mode (i.e., the servo motor 2 is stopped and the alternating pulse power supply is not supplied with power), the second comparative example adopts an ultrasonic circumferential stirring mode (i.e., the ultrasonic vibration stirring rod 14 is fixed at the center of the driven gear 13 and the alternating pulse power supply is not supplied with power), and the third comparative example adopts an ultrasonic cycloid stirring mode (i.e., the alternating pulse power supply is not supplied with power).
Claims (10)
1. The method for preparing the green nano cutting fluid by combining cycloidal ultrasonic stirring with an alternating electric field is characterized by comprising the following steps of: the method comprises the following specific steps:
the first step is as follows: placing the organic glass container on a section bar frame; the bottom of the organic glass container is provided with a shock pad; an integrally formed cylindrical upright column is arranged at the center of the organic glass container; the ultrasonic vibration stirring rod is arranged in the organic glass container; the two arc electrodes are symmetrically arranged on the inner wall of the organic glass container and are connected with an alternating pulse power supply through leads; pouring the cutting fluid pre-mixed liquid into an organic glass container; starting a servo motor, simultaneously connecting an ultrasonic vibration stirring rod with an ultrasonic pulse power supply by a temperature control device, and turning on an alternating pulse power supply for supplying power to two arc-shaped electrodes; the servo controller controls the rotating speed of the servo motor; the driving force of the servo motor is transmitted to the driving shaft through the coupling, and the driving shaft is supported in the cylindrical stand column of the organic glass container through the bearing; the driving shaft drives a driving gear fixed on the driving shaft to rotate; because the gear ring is fixed on the profile frame, the driven gear rotates around the driving gear when meshed with the driving gear and the gear ring; moreover, the ultrasonic vibration stirring rod is eccentrically fixed on the driven gear, and the driven gear drives the ultrasonic vibration stirring rod to rotate around the center of the driven gear while rotating, so that the physical stirring of the ultrasonic vibration stirring rod in the organic glass container is realized; meanwhile, due to the combined action of the ultrasonic pulse and the alternating pulse, the compound action of cycloidal ultrasonic stirring and an alternating electric field is realized in a stirring area;
The second step is that: circulating stirring
the ultrasonic vibration stirring rod rotates periodically along with the driven gear to form periodic stirring, one stirring period is 10-15 minutes, and the circulation is carried out for 5-10 times; in each stirring period, when the temperature of the cutting fluid pre-mixed liquid in the organic glass container measured by the temperature sensor exceeds 60 ℃, the temperature control device automatically cuts off the power supply of the ultrasonic vibration stirring rod, stops vibrating, only carries out physical stirring, the alternating electric fields of the two arc-shaped electrodes continuously keep working, meanwhile, the flow of the normal-temperature water in the water cooling channels arranged on the outer wall and the bottom of the organic glass container is increased, when the temperature of the cutting fluid pre-mixed liquid to be measured is reduced to the normal temperature, the ultrasonic vibration stirring rod is powered again, ultrasonic vibration stirring is carried out, and meanwhile, the flow of the normal-temperature water in the water cooling channels is reduced;
The third step: and after stirring, closing the ultrasonic pulse power supply and the alternating pulse power supply, standing, and cooling the cutting fluid pre-mixed liquid in the organic glass container to normal temperature by using normal-temperature water in the water cooling channel to obtain the homogeneous green nano cutting fluid.
2. The method for preparing the green nano cutting fluid by combining cycloidal ultrasonic stirring with an alternating electric field according to claim 1, which is characterized by comprising the following steps of: the bearing is axially limited through a bearing cover.
3. The method for preparing the green nano cutting fluid by combining cycloidal ultrasonic stirring with an alternating electric field according to claim 1, which is characterized by comprising the following steps of: and the base of the servo motor is fixed on the section bar frame through a motor frame.
4. The method for preparing the green nano cutting fluid by combining cycloidal ultrasonic stirring with an alternating electric field according to claim 1, which is characterized by comprising the following steps of: the driven gear is provided with a plurality of mounting holes which are arranged in an Archimedes spiral line according to the arrangement rule, and the ultrasonic vibration stirring rod is fixed at the mounting hole which is arranged at the penultimate position away from the center of the driven gear.
5. the method for preparing the green nano cutting fluid by combining cycloidal ultrasonic stirring with an alternating electric field according to claim 4, which is characterized by comprising the following steps of: the distance d between the center of each mounting hole and the center of the driven gear is a + b theta, wherein a is the distance between the center of the mounting hole closest to the center of the driven gear and the center of the driven gear, and b is a coefficient larger than r and smaller than r; and recording the connecting line of the center of the mounting hole closest to the center of the driven gear and the center of the driven gear as a line segment A, wherein theta is the angle required by the line segment A rotating to the connecting line of the center of the mounting hole provided with the ultrasonic vibration stirring rod and the center of the driven gear along the Archimedes spiral direction.
6. the method for preparing the green nano cutting fluid by combining cycloidal ultrasonic stirring with an alternating electric field according to claim 4 or 5, which is characterized by comprising the following steps of: if the radius of the gear ring is R, the radius of the driven gear is R, and the rotation angular velocity is omega, the trajectory of the center of the ultrasonic vibration stirring rod in the coordinate system xoy is as follows:
Wherein t is the operating time of the servo motor.
7. the method for preparing the green nano cutting fluid by combining cycloidal ultrasonic stirring with an alternating electric field according to claim 1, 4 or 5, wherein the method comprises the following steps: because two arc electrodes take the heterogeneous electric charge of equivalent, the electric field intensity between two points that the position corresponds and the interval is d on two arc electrodes is:
Wherein, U is the voltage of the alternating pulse power supply.
8. the method for preparing the green nano cutting fluid by combining cycloidal ultrasonic stirring with an alternating electric field according to claim 1, which is characterized by comprising the following steps of: the arc-shaped electrode is made of brass.
9. The method for preparing the green nano cutting fluid by combining cycloidal ultrasonic stirring with an alternating electric field according to claim 1, 4 or 5, wherein the method comprises the following steps: the pulse frequency of the ultrasonic pulse power supply is 20-50 kHz, and the power is 400-600W; the voltage of the alternating pulse power supply is 40-60V, and the pulse frequency is 100-200 kHz.
10. The method for preparing the green nano cutting fluid by combining cycloidal ultrasonic stirring with an alternating electric field according to claim 1, 4 or 5, wherein the method comprises the following steps: the cutting fluid pre-mixed liquid is prepared as follows: firstly, mixing castor oil, chitin and nano-scale diamond powder in a mass ratio of 1 (0.5-2.5) to 0.25-1 in an organic glass container, mixing the obtained solution with deionized water in a mass ratio of 1 (5-20), and finally adding no more than 5g of sodium chloride crystal to obtain the cutting fluid pre-mixed solution.
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