阅读说明：本技术 一种环保型电火花线切割液及其制备方法和应用 (Environment-friendly electric spark wire cutting fluid and preparation method and application thereof ) 是由 张雪梅 王涛 王箫 徐念 于 2020-04-27 设计创作，主要内容包括：本发明公开了一种环保型电火花线切割液及其制备方法和应用,其包括如下组分：悬浮剂、分散剂、爆炸剂、防腐剂、防锈剂、pH值调整剂、粘度调节剂、消泡剂、色彩调节剂、气味调节剂、电导率调整剂、玻璃成形剂和水；其制备过程必须依次添加混合上述组分且不可调整,其主要应用于快走丝线切割中,也可以应用于中丝及慢丝工艺；本发明的电火花切割液具有不含矿物油(环保处理效果好)、加工效率高12000-21000mm<Sup>2</Sup>/h)、加工寿命长(0.18mm钼丝,寿命大于40万平方毫米)、表面光洁度高(ra<1.5um)、加工渗透性能好(加工厚度大于1.5m)等诸多优点,具有广泛的社会经济价值和相应的环保价值。(The invention discloses an environment-friendly electric spark wire cutting fluid, a preparation method and an application thereof, wherein the environment-friendly electric spark wire cutting fluid comprises the following components: suspending agents, dispersing agents, explosion agents, preservatives, rust inhibitors, pH regulators, viscosity regulators, defoaming agents, color regulators, odor regulators, conductivity regulators, glass forming agents and water; the preparation process of the yarn needs to sequentially add and mix the components and can not be adjusted, and the yarn is mainly applied to the cutting of a fast-moving yarn and can also be applied to the medium-speed and slow-speed yarn processes; the electric spark cutting fluid of the invention does not contain mineral oil (good environment-friendly treatment effect), and has high processing efficiency of 12000-21000mm 2 H), long working life (0.18mm molybdenum wire, life greater than 40 ten thousand square millimeters), and high surface finish (ra)<1.5um), good processing permeability (the processing thickness is more than 1.5m), and the like, and has wide social and economic values and corresponding environmental protection values.)

1. The environment-friendly electric spark wire cutting fluid is characterized by comprising the following components in parts by mass: 1-10 parts of suspending agent, 1-10 parts of dispersing agent, 1-10 parts of explosive agent, 0.1-1 part of preservative, 0.1-1 part of antirust agent, 0.1-1 part of pH value regulator, 1-10 parts of viscosity regulator, 0.1-1 part of defoaming agent, 0.1-1 part of color regulator, 0.1-1 part of odor regulator, 0.1-1 part of conductivity regulator, 1-10 parts of glass forming agent and 1-10 parts of water;

the electric spark wire cutting fluid is prepared by the following method: adding 1-10 parts of suspending agent, 1-10 parts of dispersing agent, 1-10 parts of explosive agent, 0.1-1 part of preservative, 0.1-1 part of antirust agent, 0.1-1 part of pH value regulator, 1-10 parts of viscosity regulator, 0.1-1 part of defoaming agent, 0.1-1 part of color regulator, 0.1-1 part of odor regulator, 0.1-1 part of conductivity regulator, 1-10 parts of glass forming agent and 1-10 parts of water into a mixer in sequence, stirring and mixing for reaction to obtain the aqueous solution;

the use process of the environment-friendly electric spark wire cutting fluid comprises the following steps: mixing the environment-friendly electric spark wire cutting fluid with water according to the feeding volume ratio of 1: 5-8 for use; wherein, when in use: the adopted current is more than 0 and less than or equal to 10A, the range between pulses is more than 0 and less than or equal to 10000, the stepping can be adjusted to be manual or automatic follow-up, and the linear speed is more than 0 and less than or equal to 8 m/s; the distance between the electrode wire and the workpiece is more than 0 and less than or equal to 1 mm;

the electric conductivity of the electric spark wire cutting liquid is 0.001-13S/m, the pH value of the electric spark wire cutting liquid is 6.5-8.5, the viscosity of the electric spark wire cutting liquid is 50-500mps, and the specific gravity of the electric spark wire cutting liquid is 1.0-1.15;

the environment-friendly electric spark wire cutting fluid has the following effects after being used: the maximum processing efficiency is not lower than 21000mm²/h；

Processing life: for 0.18mm molybdenum wire, the service life is more than 40 ten thousand square millimeters;

surface smoothness: ra <1.5 um; the processing thickness is more than 1.5 m; standing for over 15 days.

2. The environment-friendly electric spark wire cutting fluid as claimed in claim 1, wherein the temperature of the stirring mixing reaction is 40-60 ℃, the time of the stirring mixing reaction is 2-48 hours, the stirring speed of the stirring mixing reaction is 1-3600rpm/min, and the pressure of the stirring mixing reaction is 0.1-2 Mpa; and/or the preparation method further comprises a filtering step after the stirring, mixing and reacting, wherein the filtering step adopts filtering with the mesh number of more than 0 and equal to or less than 2000 meshes.

3. The environment-friendly electric spark wire cutting fluid as claimed in claim 1, wherein the suspending agent is one or more selected from the group consisting of fatty acid polyoxyethylene ether, OP type surfactant and Tween type surfactant, wherein the fatty acid polyoxyethylene ether comprises dodecyl polyoxyethylene ether, tetradecyl polyoxyethylene ether, hexadecyl polyoxyethylene ether and octadecyl polyoxyethylene ether.

4. The environment-friendly electric spark wire cutting fluid as claimed in claim 1, wherein the dispersant is one or more selected from the group consisting of fatty acid polyoxyethylene ether phosphate, fatty acid polyoxyethylene ether borate, fatty acid polyoxyethylene ether silicone grease, fatty acid polyoxyethylene ether sulfonate, hydroxyl ethylidene phosphate and amino acid type surfactant.

5. The environment-friendly electric spark wire cutting fluid as claimed in claim 1, wherein the explosive agent is one or more selected from ammonium nitrate, sucrose, hydrazine compounds, azide compounds, triethylene diamine, tetraethylene triamine, melamine and citric acid.

6. The environment-friendly electric spark wire cutting fluid as claimed in claim 1, wherein the preservative is one or more of phenol, benzoic acid, formaldehyde and sodium lactate.

7. The environment-friendly electric spark wire cutting fluid as claimed in claim 1, wherein the antirust agent is one or more of sodium nitrite, benzotriazole, oxalic acid, citric acid, corresponding salts thereof and related derivatives thereof.

8. The environment-friendly electric spark wire cutting fluid as claimed in claim 1, wherein the pH value regulator is one or more selected from ammonium hydrogen phosphate, sodium borate and sodium citrate.

9. The environment-friendly electric spark wire cutting fluid as claimed in claim 1, wherein the viscosity modifier is one or more selected from polyvinyl alcohol, shellac and guar gum.

10. The environment-friendly electric spark wire cutting fluid as claimed in claim 1, wherein the defoaming agent is one or more selected from ethanol, tributyl phosphate and silicone defoaming agent; and/or the color modifier is sky blue, red or green; and/or the odor regulator is lavender fragrance regulator, lemon fragrance regulator, cardamom fragrance regulator, rose fragrance regulator, chrysanthemum fragrance regulator or tea fragrance regulator.

11. The environment-friendly electric spark wire cutting fluid as claimed in claim 1, wherein the conductivity regulator is one or more selected from ethanol, sodium chloride, sodium nitrate, potassium nitrate, ammonium nitrate and ethyl acetate.

12. The environment-friendly electric spark wire cutting fluid as claimed in claim 1, wherein the glass former is one or more selected from sodium borate, sodium phosphate, sodium silicate and calcium chloride.

13. The preparation method of the environment-friendly electric spark wire cutting fluid of claim 1, which is characterized by comprising the following steps: weighing the raw materials according to the formula ratio, and then adding a suspending agent, a dispersing agent, an explosive agent, a preservative, an antirust agent, a pH value regulator, a viscosity regulator, a defoaming agent, a color regulator, an odor regulator, a conductivity regulator, a glass forming agent and water into a mixer in sequence, stirring and mixing for reaction to obtain the glass ceramic; wherein the temperature of the stirring and mixing reaction is 40-60 ℃, and the pressure of the stirring and mixing reaction is 0.1-2 Mpa.

14. The use of the environment-friendly electric spark wire cutting fluid as claimed in any one of claims 1-12 in electric spark wire cutting.

15. The use according to claim 14, wherein the environmentally friendly electric spark wire cutting fluid is used in fast wire electric spark wire cutting, medium wire electric spark wire cutting and slow wire electric spark wire cutting, respectively.

Technical Field

The invention relates to the technical fields of plasma discharge, a pulse power supply technology, a chemical liquid medicine formula technology, machining and the like, in particular to environment-friendly electric spark wire cutting fluid and a preparation method and application thereof.

Background

Along with the urbanization process of China, the agricultural culture disappears for thousands of years, and China also enters the industrialized era. The obvious characteristics of the industrialized era are the large-scale use of machines and the large-scale improvement of labor production efficiency. The large-scale use of the machine does not leave a large amount of machining. Machining is a traditional industry which has been in existence for thousands of years, and is a brand new industry. New machining techniques are continuously emerging, such as 3D printing, laser casting, wire electrical discharge machining, etc. The new processing technology can meet a plurality of new requirements, such as higher strength, higher precision, lower cost and the like. The new processing technology also has special requirements, such as constant temperature, constant humidity, ultra-clean and the like. The conventional machining technology also has new requirements under new technical conditions, such as surface rust prevention, environmental protection, machining precision, surface finish and the like.

Among them, wire electric discharge machining is a machining method which has appeared in the last 60 years. At present, two development modes exist at home and abroad, one is the special rapid wire-moving electric spark wire cutting in China, and the other is the slow wire-moving electric spark wire cutting. The difference ratio between the two is shown in table 1.

TABLE 1 comparison table of basic parameters of different types of wire-electrode cutting

Item	Slow filament	Fast silk
			Speed of wire (m/s)	0.00l～0.25	8～10
Cutting fluid	Ionic water	Oil-based or water-based linear cutting working fluid
			Direction of wire transport	One-way disposable	Can be repeatedly used
Electrode wire material	Alloys of brass and copper	Molybdenum, tungsten-molybdenum alloy
			Wire electrode diameter mm	0.003-0.30	0.03-0.25
Price of machine tool	Millions, imports	Tens of thousands, made in China
			Precision and surface roughness	Height of	Is low in
The domestic market accounts for percent	10	90
			Processing expense (Yuan/square millimeter)	0.2-0.5	0.005-0.1

The basic principle of wire electrical discharge machining (as shown in fig. 1-2) is generally: applying a constant voltage between the workpiece and the electrode, and under the condition of close enough distance (0-100 microns), breaking down the electric field to form arc discharge; the high-temperature discharge of the electric arc instantly vaporizes the metal, and the vaporized and cooled metal powder is gradually taken away to form corresponding cutting. However, the positive electrode and the negative electrode are fused and volatilized simultaneously in the discharging process, and further certain negative effects are caused on the factors influencing the continuous work of wire electrode cutting, such as the service life of a wire electrode, and the like, and at present, people often solve the problem by the following methods: 1) keeping the workpiece unchanged, and moving the electrode wire at a speed of more than 8m/s, so that the heating volatilization time of the electrode wire is far shorter than that of the workpiece; 2) the workpiece is connected with the anode, the electrode wire is connected with the cathode, electrons generated by the electrode wire can rapidly heat the workpiece in a short time, the movement speed of cations generated by the workpiece is one ten-thousandth of the electrons, and the cutting electrode wire is further protected; 3) cooling the electrode wire in time by adopting the wire cutting fluid; 4) and an intermittent discharge mode is adopted, so that the electrode wire is further fully cooled. Through the improvement mode, the evaporation effect caused by discharge is different by tens of thousands of times, and then the cutting processing can be continuously carried out.

At present, a plurality of electric spark machine tool manufacturing bases such as Shenyang, Beijing, Chengdu, Wenzhou, Thai and the like exist in China, only 2 ten thousand fast electric spark wire cutting machine tools are produced and sold in Tazhou one year, and the market quantity of the fast electric spark wire cutting machine tools exceeds 20 ten thousand. The wire cutting fluid is an essential working medium in the wire cut electrical discharge machining, and the cooling, arc extinguishing and chip removal machining processes of the wire electrode are realized by the aid of the wire cutting fluid during the wire cut electrical discharge machining. At present, the wire cutting fluid suppliers seen on the market are dozens of manufacturers such as luxurious, good, treasure and Nanjing lubricating oil, annual production of wire cutting fluid is more than dozens of thousands of tons, and the market capacity number is billion RMB.

Wherein, the slow yarn usually adopts high-purity water as the wire cutting fluid, and the fast yarn usually adopts oil or water-based working fluid as the wire cutting fluid. However, oil cutting fluid is gradually eliminated in the industry due to poor processing effect and high pollution, and meanwhile, although the problem of serious pollution is overcome to a certain extent by a water-based working fluid compound formula appearing in the current market, with the development of technology and social progress, the existing wire cutting fluid has the series problems of high cost, low efficiency, black wire, filigree, broken wire, poor surface gloss, short service life and the like when the current is high in current, small in pulse and over 400mm thick and large workpieces.

Disclosure of Invention

The invention aims to overcome one or more defects in the prior art, and provides an improved electric spark wire cutting fluid which can improve the efficiency, the cutting effect and the like of electric spark wire cutting, and is particularly suitable for cutting high-current and small-pulse workpieces with over 400mm and extra-thick parts.

The invention also provides a preparation method of the electric spark wire cutting fluid.

The invention also provides application of the electric spark wire cutting fluid in electric spark wire cutting, and the electric spark wire cutting fluid is suitable for electric spark wire cutting of fast wires, medium wires and slow wires.

In order to achieve the purpose, the invention adopts a technical scheme that: the environment-friendly electric spark wire cutting fluid comprises the following components in parts by mass: 1-10 parts of suspending agent, 1-10 parts of dispersing agent, 1-10 parts of explosive agent, 0.1-1 part of preservative, 0.1-1 part of antirust agent, 0.1-1 part of pH value regulator, 1-10 parts of viscosity regulator, 0.1-1 part of defoaming agent, 0.1-1 part of color regulator, 0.1-1 part of odor regulator, 0.1-1 part of conductivity regulator, 1-10 parts of glass forming agent and 1-10 parts of water.

According to the invention, the preparation method of the electric spark wire cutting fluid comprises the following steps: 1-10 parts of suspending agent, 1-10 parts of dispersing agent, 1-10 parts of explosive agent, 0.1-1 part of preservative, 0.1-1 part of antirust agent, 0.1-1 part of pH value regulator, 1-10 parts of viscosity regulator, 0.1-1 part of defoaming agent, 0.1-1 part of color regulator, 0.1-1 part of odor regulator, 0.1-1 part of conductivity regulator, 1-10 parts of glass forming agent and 1-10 parts of water are added into a mixer in sequence and stirred for mixing reaction; the preparation process is consecutive, the reaction sequence is not adjustable, and the logic sequence of the reaction is not adjustable.

According to some preferred aspects of the present invention, the temperature of the stirring mixing reaction is 40 to 60 ℃, the time of the stirring mixing reaction is 2 to 48 hours, the stirring speed of the stirring mixing reaction is 1 to 3600rpm/min, and the pressure of the stirring mixing reaction is 0.1 to 2 Mpa.

According to some preferred aspects of the present invention, the electric spark wire cutting fluid has an electrical conductivity of 0.001 to 13S/m. In a further preferred embodiment of the present invention, the electric spark wire cutting fluid has an electric conductivity of 7 to 13S/m.

According to some preferred aspects of the present invention, the electric spark wire cutting fluid has a pH of 6.5 to 8.5.

According to some preferred aspects of the present invention, the electric discharge wire cutting fluid has a viscosity of 50 to 500 mps.

According to some preferred aspects of the present invention, the electric discharge wire cutting fluid has a specific gravity of 1.0 to 1.15.

According to some preferable aspects of the invention, the environment-friendly electric spark wire cutting fluid is prepared by the following steps: mixing the environment-friendly electric spark wire cutting fluid and water according to the feeding volume ratio of 1: 5-8 for use.

According to some preferred aspects of the invention, the wire cutting fluid of the invention uses a current greater than 0 and less than or equal to 10A, the inter-pulse range of the wire cutting fluid of the invention is greater than 0 and less than or equal to 10000, and the stepping of the wire cutting fluid of the invention can be adjusted to be manual or automatic; the linear speed of the linear cutting fluid used in the invention is more than 0 and less than or equal to 8 m/s; in the invention, the distance from the wire to the workpiece is more than 0 and less than or equal to 1 mm.

According to the invention, the wire cutting fluid has the using effects that: the processing efficiency can reach 21000mm²H, long processing life (0.18mm molybdenum wire, the life can be more than 40 ten thousand square millimeters), high surface finish (ra)<1.5um), good processing permeability (the processing thickness can be more than 1.5m), good antirust effect (the standing rust-free time is more than 15 days). Simultaneously, the wire cutting fluid has the environmental protection effects that: the pH value of the wire cutting liquid is 6.5-8.5, and the wire cutting liquid can be directly contacted and prepared by hands without generating corresponding corrosion ablation; the linear cutting fluid does not produce oil stain and other related stains, and workpieces are easy to strip and clean; the color of the wire cutting fluid can be adjusted, and the conventional wire cutting fluid can be sky blue; the taste design of the wire cutting liquid can reduce the stink generated by metal discharge in the wire cutting process and improve the use customer experience of the wire cutting liquid; the waste liquid of the wire cutting fluid can be directly diluted after being diluted by water and filtered to remove metal particlesReleasing and discharging natural water, and meeting the national standard.

According to some preferred aspects of the present invention, the suspending agent includes, but is not limited to, a combination of one or more selected from the group consisting of fatty acid polyoxyethylene ethers including dodecyl polyoxyethylene ether, tetradecyl polyoxyethylene ether, hexadecyl polyoxyethylene ether, and octadecyl polyoxyethylene ether, fatty acid polyoxyethylene ethers including, but not limited to, OP-10 surfactants, and Tween-type surfactants including, but not limited to, Tween-20 and Tween-80. Specifically, in the present invention, the suspending agent refers to a surfactant capable of adsorbing with the nano micron metal powder and having a long chain hydrophilic structure, and the surfactant includes but is not limited to one or more of the following organic combinations: fatty acid polyoxyethylene ethers including dodecyl, tetradecyl, hexadecyl, and octadecyl polyoxyethylene ethers; OP series OP-10 and other surfactants, Tween series surfactants, etc.; preferred are fatty acid-series polyoxyethylene ethers, and more preferred is a cetyl polyoxyethylene ether suspending agent.

According to some preferred aspects of the invention, the dispersant is a combination of one or more selected from the group consisting of fatty acid polyoxyethylene ether phosphate, fatty acid polyoxyethylene ether borate, fatty acid polyoxyethylene ether silicone grease, fatty acid polyoxyethylene ether sulfonate, hydroxy ethidene phosphate, and amino acid type surfactant. Specifically, in the present invention, the dispersant refers to a surfactant capable of enriching on the surface of the nano-powder and charging the nano-metal powder with a certain charge, and the surfactant includes but is not limited to one or more of the following organic combinations: fatty acid polyoxyethylene ether phosphate, borate, silicone grease, sulfonate and the like, and also comprises partial chelating surfactants such as hydroxyethylidene phosphate and the like, and partial biomass surfactants such as amino acid series and the like; the preferable dispersant is fatty acid polyoxyethylene ether phosphate series, and more preferable is octadecyl fatty acid polyoxyethylene ether phosphate series.

According to some preferred aspects of the present invention, the explosive agent is a combination of one or more selected from the group consisting of ammonium nitrate, sucrose, hydrazine-based compounds, azide-based compounds, triethylenediamine, tetraethylenetriamine, melamine, and citric acid. Specifically, in the present invention, the explosive agent is capable of releasing a large amount of gas at the moment of electric spark discharge to promote rapid elimination of metal particles, and the explosive agent includes, but is not limited to, one or more of the following organic combinations: ammonium nitrate, sucrose, hydrazine compounds, azide compounds, triethylene diamine, tetraethylene triamine, melamine, citric acid and the like; the explosion agent is preferably an explosion agent of sucrose series, and more preferably an explosion agent of sucrose mixed melamine series.

According to some preferred aspects of the invention, the preservative is a combination of one or more selected from phenol, benzoic acid, formaldehyde and sodium lactate. Specifically, the preservative has the effects of preventing mildew, bacteria and odor in the production process of the wire cutting fluid. The preservative includes but is not limited to one or several of the following organic combinations: such as phenol, benzoic acid, formaldehyde, sodium lactate, and the like. Preferred preservatives are sodium lactate series and sodium benzoate series, and more preferred are sodium benzoate series and derivatives thereof.

According to some preferred aspects of the present invention, the rust inhibitor is a combination of one or more selected from the group consisting of sodium nitrite, benzotriazole, oxalic acid, citric acid and corresponding salts thereof and related derivatives. Specifically, in the present invention, the rust inhibitor has the effects of preventing the rust of the workpiece, increasing the corrosion prevention time of the surface of the workpiece, and the like. The antirust agent comprises one or more of the following organic components in combination: such as sodium nitrite, benzotriazole, oxalic acid, citric acid and their corresponding salts and related derivatives; the preferred antirust agent is benzotriazole and a derivative series antirust agent thereof, and further the preferred antirust system is a mixture of benzotriazole and oxalic acid.

According to some preferred aspects of the invention, the pH adjusting agent is a combination of one or more selected from the group consisting of ammonium hydrogen phosphate, sodium borate and sodium citrate. Specifically, the pH value regulator can effectively control the pH value of the wire cutting fluid and ensure the working stability of the wire cutting fluid. The pH adjusting agent includes, but is not limited to, one or more of the following organic combinations: such as ammonium hydrogen phosphate, sodium borate, sodium citrate, and related salts and derivatives; the preferred pH adjusting agent is a hydrogen ammonium phosphate system.

According to some preferred aspects of the invention, the viscosity modifier is a combination of one or more selected from the group consisting of polyvinyl alcohol, shellac and guar gum. Specifically, in the invention, the viscosity regulator, the dispersing agent and the suspending agent are used together to suspend and take away the metal particles cut by the electric spark in time. The viscosity modifier includes but is not limited to one or several of the following organic combinations: such as polyvinyl alcohol, shellac, guar gum, etc., preferred viscosity modifiers are the polyvinyl alcohol series and their related derivatives.

According to some specific aspects of the present invention, the defoamer is a combination of one or more selected from the group consisting of ethanol, tributyl phosphate, and silicone defoamers. Specifically, in the present invention, the defoaming agent is mainly used for eliminating foam generated by a large amount of surfactant under water-based conditions; the defoaming agent includes but is not limited to one or several of the following organic combinations: such as ethanol, tributyl phosphate, silicone antifoam agents, and the like; preferred defoamers are the silicone series of defoamers.

According to some specific aspects of the invention, the color modifier is sky blue, red or green. Specifically, the color regulator is mainly used for regulating the color of the wire cutting fluid, so that people can generate pleasant working feeling, or materials can be distinguished, and related accidents such as misuse, drinking mistake, arrangement mistake and the like of the materials can be avoided. The color modifier includes but is not limited to one or several of the following organic combinations: such as sky blue, red, green, etc.; the preferred color is sky blue.

According to some specific aspects of the invention, the odor regulator is a lavender regulator, a lemon regulator, a cardamom regulator, a rose regulator, a chrysanthemum regulator, or a tea regulator. Specifically, the odor regulator is used for regulating the odor of the wire cutting fluid, reducing the foul odor generated by metal discharge in the wire cutting process and improving the use customer experience of the wire cutting fluid: the odor regulator comprises one or more of the following organic components in combination: such as lavender fragrance, cardamom fragrance, rose fragrance, chrysanthemum fragrance, tea fragrance, etc., the preferred fragrance is lavender fragrance.

According to some preferred aspects of the present invention, the conductivity modifier is a combination of one or more selected from the group consisting of ethanol, sodium chloride, sodium nitrate, potassium nitrate, ammonium nitrate and ethyl acetate. Specifically, the conductivity regulator is mainly used for controlling the conductivity of the wire-cutting fluid, and controlling the waveform and the effect of discharge. The conductivity regulator comprises one or more of ethanol, sodium chloride, sodium nitrate, potassium nitrate, ammonium nitrate, ethyl acetate related salts and derivatives thereof.

According to some preferred aspects of the present invention, the glass former is a combination of one or more selected from the group consisting of sodium borate, sodium phosphate, sodium silicate and calcium chloride. Specifically, in the invention, the glass forming agent is mainly used for protecting wire cutting metal wires and controlling the loss of the metal wires in the discharging process, and the glass forming agent comprises one or more of the following organic combination: sodium borate, sodium phosphate, sodium silicate, calcium chloride and related salts and derivatives thereof; the preferred glass former is a sodium phosphate system glass former.

The invention provides another technical scheme that: the preparation method of the environment-friendly electric spark wire cutting fluid comprises the following steps: weighing the raw materials according to the formula ratio, and then adding a suspending agent, a dispersing agent, an explosive agent, a preservative, an antirust agent, a pH value regulator, a viscosity regulator, a defoaming agent, a color regulator, an odor regulator, a conductivity regulator, a glass forming agent and water into a mixer in sequence to be stirred and mixed for reaction to obtain the composite material, wherein the preparation process is consecutive, the reaction sequence is not adjustable, and the logic sequence of the reaction is not adjustable; wherein the temperature of the stirring and mixing reaction is 40-60 ℃, and the pressure of the stirring and mixing reaction is 0.1-2 Mpa.

In some embodiments of the invention, the method of preparation further comprises a filtration and split charging step after the mixing and stirring reaction. Wherein the mesh number of the filtration is less than 2000 meshes.

The invention provides another technical scheme that: the application of the environment-friendly electric spark wire cutting fluid in electric spark wire cutting is provided.

According to the invention, the wire cutting fluid can be applied to fast wire-moving electric spark wire cutting, the wire cutting fluid can be applied to slow wire-moving electric spark wire cutting fluid, and the wire cutting fluid can be applied to medium wire-moving wire cutting fluid.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

the cutting fluid can be really matched with various types of workpieces, particularly can meet the technical requirements of electrospark wire-electrode cutting of high-current, small-pulse and over-thick large workpieces with the thickness of more than 400mm by integrally designing the formula of the cutting fluid, particularly by organically combining a conductivity regulator, a suspending agent, a glass forming agent and the like, has remarkably improved cutting efficiency and remarkably reduced wire electrode loss, and simultaneously effectively reduces environmental pollution and human damage caused by wire cutting.

Drawings

FIG. 1 is a graph of voltage and current during a prior art wire electrical discharge machining process;

FIG. 2 is a schematic diagram of a prior art simulation of wire cutting;

FIG. 3 shows the discharging effect of the wire cutting fluid of example 1;

fig. 4 is a comparison of cut metal appearance of example 1 and conventional wire cutting fluid (example 1 on the left and conventional comparative example 1 wire cutting fluid on the right).

Detailed Description

At present, the existing electric spark wire cutting fluid mainly comprises oil cutting fluid and water-based cutting fluid, the oil cutting fluid is gradually eliminated by the industry due to poor processing effect and large pollution, and the water-based cutting fluid is gradually valued by people. Although the existing water-based cutting fluid overcomes the problem of serious pollution to a certain extent, with the development of the technology and the social progress, when a workpiece with high current, small pulse and over 400mm and large thickness is processed, the existing wire cutting fluid mainly has the following defects in use: high cost, low efficiency, black silk, filament, broken silk, poor surface glossiness, short service life of the electrode wire and the like.

Based on the problems, the inventor comprehensively considers and deeply researches related technical fields such as plasma discharge, a pulse power supply technology, a chemical liquid formula technology, machining and the like, innovatively provides a technical requirement that the cutting fluid can be really matched with various types of workpieces, particularly electric spark wire cutting of ultra-thick large workpieces with high current, small pulse intervals and over 400mm through the integral design of the formula of the cutting fluid, the cutting fluid has remarkably improved cutting efficiency and remarkably reduced wire electrode loss, meanwhile, the pollution to the environment and the damage to a human body caused by wire cutting are effectively reduced, and the formula of the wire cutting fluid can be really matched with the technical requirements of the fields.

Specifically, the environment-friendly electric spark wire cutting fluid provided by the invention comprises the following components in parts by mass: 1-10 parts of suspending agent, 1-10 parts of dispersing agent, 1-10 parts of explosive agent, 0.1-1 part of preservative, 0.1-1 part of antirust agent, 0.1-1 part of pH value regulator, 1-10 parts of viscosity regulator, 0.1-1 part of defoaming agent, 0.1-1 part of color regulator, 0.1-1 part of odor regulator, 0.1-1 part of conductivity regulator, 1-10 parts of glass forming agent and 1-10 parts of water. Preferably, the electric spark wire cutting fluid has an electric conductivity of 0.001 to 13S/m, and in a further preferred embodiment of the present invention, the electric spark wire cutting fluid has an electric conductivity of 7 to 13S/m. The pH value of the electric spark wire cutting fluid is 6.5-8.5, the viscosity of the electric spark wire cutting fluid is 50-500mps, and the specific gravity of the electric spark wire cutting fluid is 1.0-1.15.

Preferably, the preparation method of the electric spark wire cutting fluid comprises the following steps: 1-10 parts of suspending agent, 1-10 parts of dispersing agent, 1-10 parts of explosive agent, 0.1-1 part of preservative, 0.1-1 part of antirust agent, 0.1-1 part of pH value regulator, 1-10 parts of viscosity regulator, 0.1-1 part of defoaming agent, 0.1-1 part of color regulator, 0.1-1 part of odor regulator, 0.1-1 part of conductivity regulator, 1-10 parts of glass forming agent and 1-10 parts of water are added into a mixer in sequence and stirred for mixing reaction; the preparation process is consecutive, the reaction sequence is unadjustable, the logical sequence of the reaction is unadjustable, the temperature of the stirring mixing reaction is 40-60 ℃, the time of the stirring mixing reaction is 2-48 hours, the stirring speed of the stirring mixing reaction is 1-3600rpm/min, and the pressure of the stirring mixing reaction is 0.1-2 Mpa.

In practical application, the formula of the electric spark wire cutting fluid realizes that:

1. the linear cutting fluid removes all mineral oil components, reduces the pollution of mineral oil waste liquid to the environment, greatly reduces the formation of a viscous tar system by removing the mineral oil, greatly improves the chip removal function of the linear cutting fluid, and simultaneously improves the cleaning performance and the corresponding piece taking performance of corresponding workpieces;

2. according to the wire cutting fluid, the corresponding conductivity regulator is added, so that the stability of electric spark discharge is greatly improved, and the working efficiency of the corresponding electric spark discharge is improved; the inventor of the invention controls the conductivity of the wire cutting fluid before the discharge starts, and avoids the following phenomena in the prior art: the resistivity is too high, the discharge distance is short, the discharge channel distance is short, the discharge current is increased sharply, the wire electrode is broken instantly, and even a large number of pockmarks are generated; the conductivity is too high, the discharge distance is too far, the energy accumulation is insufficient, the processing efficiency is insufficient, and the cutting is still;

3. the wire cutting fluid disclosed by the invention is added with a corresponding suspension, dispersion and viscosity stabilizing system, so that the permeation efficiency of the wire cutting fluid is greatly improved, and meanwhile, corresponding metal slag chips can be taken away in time, and the stable and efficient operation of wire cutting is maintained;

4. the wire cutting fluid of the invention is added with corresponding color and smell regulator. The addition of the regulator can greatly improve the field use working condition of the wire cutting fluid and simultaneously has the corresponding functions of error prevention and fool prevention; on the other hand, the introduction of the substances can also generate a protective effect on the wire electrode during cutting, and the introduction of the taste can also reduce the stink generated by metal discharge in the wire cutting process and improve the use customer experience of the wire cutting fluid.

5. The wire cutting fluid of the invention is added with a glass forming agent. The water-soluble glass can be formed, a nanoscale protective coating is formed at the surface of the electrode wire in the instant of discharge, the service life of the electrode wire can be greatly prolonged, a corresponding dielectric discharge blocking effect can be formed, and the discharge stability of linear cutting is improved;

6. the wire cutting fluid of the invention integrally designed as above also has the following characteristics:

in breakdown, further having: the wire electrode has a quick cooling function, and the wire cutting liquid is vaporized to absorb a large amount of energy so as to reduce the temperature of the wire electrode as much as possible; the volatilization of the electrode wire is reduced, and the service life of the electrode wire is prolonged; the glass forming function is realized, and the residues after partial vaporization can form a glass-state flexible film to be attached to the surface of the electrode wire, so that the positive ion bombardment is shielded, and the service life of the electrode wire is prolonged;

in the discharge, the discharge device further includes: the instant vaporization function is that a large amount of gas vaporized by the wire cutting fluid can instantly take away all metal powder vaporized by the workpiece and cool the workpiece. The condensation is not carried out on the surface of the workpiece, so that the quality of the surface of the workpiece is improved; the non-coking function is realized, no coking and adhesion are realized after decomposition, viscosity change is avoided, and the permeability of subsequent wire cutting fluid is ensured;

after the arc quenching, the method also comprises the following steps: the metal particles are taken away from the discharge channel in time due to the lifting function, certain suspension property, dispersity and viscosity; the cleaning function is to clean the decomposition products and metal particles generated on the discharge surface in time; the antirust function is to passivate and antirust the fresh surface generated by discharge in time.

The above-described scheme is further illustrated below with reference to specific examples; it is to be understood that these embodiments are provided to illustrate the general principles, essential features and advantages of the present invention, and the present invention is not limited in scope by the following embodiments; the implementation conditions used in the examples can be further adjusted according to specific requirements, and the implementation conditions not indicated are generally the conditions in routine experiments.

Not specifically illustrated in the following examples, all starting materials are commercially available or prepared by methods conventional in the art.