Environment-friendly cutting fluid and preparation method thereof

Abstract

The invention relates to the technical field of cutting fluid, in particular to environment-friendly cutting fluid and a preparation method thereof. 3-5 parts of an active agent; 5-10 parts of an anti-wear agent; 2-5 parts of an antirust agent; 1-3 parts of an anti-volatilization agent; 1-2 parts of a pH regulator; 3-5 parts of a bactericide; and the balance of deionized water. The anti-volatilizing agent comprises the following raw material components: 10-20 parts of polyvinyl alcohol, 5-10 parts of ethyl acrylate, 3-7 parts of ethylene glycol dimethacrylate, 1-3 parts of ammonium persulfate and 1-3 parts of ethanol. The water-based cutting fluid does not contain a sodium nitrite antirust agent and a phenol bactericide, is harmless to human bodies, well solves the problem that a traditional water-based cutting fluid goes bad and smells, improves the anti-volatilization agent, and further reduces the problem that cutting volatilization is too fast when a high-temperature workpiece is sprayed.

Description

Technical Field

[0001] The invention relates to the technical field of cutting fluids, and in particular to an environmentally friendly cutting fluid and a preparation method thereof. Background Art

[0002] Cutting fluid is a material used to cool and lubricate cutting tools and workpieces during metal processing. The use of cutting fluid can significantly reduce the friction between cutting tools and workpieces to reduce cutting temperature, reduce tool wear, increase tool life, and ensure workpiece processing accuracy.

[0003] Environmentally friendly cutting fluid is an innovative industrial fluid that has emerged under the impetus of increasingly stringent global environmental regulations and the concept of sustainable development. It uses renewable biological resources such as vegetable oils and synthetic esters as raw materials, and develops chlorine-free, low-phosphorus, low-heavy metal and highly biodegradable additives. It aims to reduce volatile organic compound (VOC) emissions and reduce pollution to the environment while maintaining excellent lubrication, cooling, cleaning and rust prevention properties to meet the metal processing industry's demand for efficient and environmentally friendly cutting fluids and promote the sustainable development of industrial production.

[0004] Due to the high difficulty in machining high-temperature alloys and the long cutting time, the cutting fluid sprayed on the high-temperature alloy evaporates too quickly, resulting in a reduction in the effectiveness of rust inhibitors, detergents, etc. in the cutting fluid. For example, the molybdenum ions in sodium molybdate may react with other components in the cutting fluid at high temperatures, causing the structure of the rust inhibitor to change, thereby affecting its anti-rust effect.

[0005] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Summary of the invention

[0006] The object of the present invention is to provide an environmentally friendly cutting fluid and a preparation method thereof which can effectively solve the above technical problems.

[0007] In order to achieve the purpose of the present invention, the following technical scheme is adopted:

[0008] An environmentally friendly cutting fluid and a preparation method thereof, comprising:

[0009] Base oil: 20-30 parts;

[0010] Active agent: 3-5 parts;

[0011] Antiwear agent: 5-10 parts;

[0012] Rust inhibitor: 2-5 parts;

[0013] Anti-volatile agent: 1-3 parts;

[0014] pH adjuster: 1-2 parts;

[0015] Fungicide: 3-5 parts;

[0016] The balance is deionized water;

[0017] The raw material components of the anti-volatile agent include: 10-20 parts of polyvinyl alcohol, 5-10 parts of ethyl acrylate, 3-7 parts of ethylene glycol dimethacrylate, 1-3 parts of ammonium persulfate, and 1-3 parts of ethanol.

[0018] Furthermore, the base oil is selected from one or more of polyethylene glycol and poly-α-olefin.

[0019] Furthermore, the active agent is selected from any one of anionic surfactants and nonionic surfactants; the anionic surfactant accounts for 5-10 parts of the total; the nonionic surfactant accounts for 3-5 parts of the total; the anionic surfactant is selected from one or more of sodium dodecyl sulfate, alkylbenzene sulfonate, and sulfate ester salt type.

[0020] Furthermore, the anti-wear agent is sulfurized fat.

[0021] Furthermore, the rust inhibitor is borate.

[0022] Furthermore, the fungicide is 1,2-benzisothiazolin-3-one.

[0023] Further, step S1: preparing an anti-volatile agent: adding polyvinyl alcohol, ethyl acrylate, ethylene glycol dimethacrylate, and ammonium persulfate to ethanol in a certain proportion, heating to 70° C., and continuing to stir and react at 70° C. for 4 hours to obtain an anti-volatile agent;

[0024] Step S2: preparing cutting fluid: adding cooled anti-volatile agent to deionized water, stirring evenly, heating in a water bath to 50-70°C, adding active agent, anti-wear agent, rust inhibitor, bactericide, pH adjuster in sequence under stirring, stirring evenly after adding each reagent before adding the next reagent, after all reagents are added completely, continue stirring evenly and filter to obtain environmentally friendly cutting fluid.

[0025] Furthermore, the rotation speed of the mechanical stirrer is 1600-1800 revolutions per minute, and the viscosity of the anti-volatile agent after stirring for 4 hours is required to be 30-450 mm2 / s.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The invention discloses an environmentally friendly cutting fluid and a preparation method thereof, which does not contain a sodium nitrite rust inhibitor and a phenolic bactericide, is harmless to the human body, and well solves the problem of deterioration and odor of a traditional water-based cutting fluid. In addition, the product improves the anti-volatile agent, and further reduces the problem of excessive volatilization of cutting when spraying a high-temperature workpiece. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments.

[0030] The sources of the raw materials used in the embodiments of the present invention are as follows:

[0031] Base oil: Jinan Bio Chemical Co., Ltd.;

[0032] Surfactant: Shandong Xinyun Chemical Technology Co., Ltd.;

[0033] Antiwear agent: Guangzhou Fufei Chemical Technology Co., Ltd.;

[0034] Rust inhibitor: Dexu New Materials (Guangzhou) Co., Ltd., item number: DX633;

[0035] pH regulator: Chongqing Kaiyin Chemical Co., Ltd., model: AMP-95;

[0036] Bactericide: Shandong Kasong New Materials Co., Ltd., product number: isothiazolinone;

[0037] Polyvinyl alcohol: Dongguan Delun New Materials Co., Ltd., content: 99%;

[0038] Ethyl acrylate: Hangzhou Oushi Technology Co., Ltd.

[0039] Ethylene glycol dimethacrylate: Shandong Jibei New Materials Co., Ltd., density: 0.977 (g / cm3);

[0040] Ammonium persulfate: Tianjin Jinhui Taiya Chemical Reagent Co., Ltd., model: jhty-0005.

[0041] In an embodiment of the present invention, a method for testing the performance of an environmentally friendly cutting fluid is as follows:

[0042] pH value test: refer to GB / T6144-2010 standard, take out an appropriate amount of sample from the cutting fluid container with a pipette, gently insert the electrode into the cutting fluid sample, wait for the reading to stabilize and then record the pH value;

[0043] Lubrication performance test: refer to GB / T3142 standard, start the test machine, gradually increase the load, each test time is 10 seconds, after each load level is completed, measure the wear scar diameter of any steel ball in the oil box, and gradually increase the load until the highest load without seizure is found, which is the maximum no-seizure load;

[0044] Defoaming performance test: refer to GB / T6144-2010 standard, use a spray gun to inject air into the cutting fluid diluted 20 times with deionized water to generate foam, and observe whether the dissipation speed and degree of the foam are qualified;

[0045] Anti-rust performance test: Referring to GB / T6144-2010 standard, dilute the cutting fluid 20 times with deionized water, apply it on the stainless steel sheet, and then place it in an environment of 33-37℃. After 24 hours, observe whether there is rust on the test piece.

[0046] Volatility test: Refer to GB / T 31430-2015 standard, place the cutting fluid in an oven with set temperature and humidity. After a certain time interval, take out the cutting oil and measure the mass of the remaining cutting oil and the mass loss, that is, the difference between the initial mass and the remaining mass, to evaluate the volatility of the cutting oil.

[0047] In an embodiment of the present invention, an environmentally friendly cutting fluid and a preparation method thereof are as follows:

[0048] Step S1: preparing an anti-volatile agent: adding polyvinyl alcohol, ethyl acrylate, ethylene glycol dimethacrylate and ammonium persulfate into ethanol in a certain proportion, heating to 70° C., and continuing to stir and react at 70° C. for 4 hours to obtain an anti-volatile agent;

[0049] Step S2: preparing cutting fluid: adding cooled anti-volatile agent to deionized water, stirring evenly, heating in a water bath to 50-70°C, adding active agent, anti-wear agent, rust inhibitor, bactericide, pH adjuster in sequence under stirring, stirring evenly after adding each reagent before adding the next reagent, after all reagents are added completely, continue stirring evenly and filter to obtain environmentally friendly cutting fluid.

[0050] Embodiment 1:

[0051] The invention discloses an environmentally friendly cutting fluid and a preparation method thereof, comprising the following components by weight: 20 parts of base oil; 3 parts of active agent; 5 parts of anti-wear agent; 2 parts of rust inhibitor; 1 part of anti-volatile agent; 1 part of pH regulator; 3 parts of bactericide; 80 parts of ionized water;

[0052] The raw material components of the anti-volatile agent include: 10 parts of polyvinyl alcohol, 5 parts of ethyl acrylate, 3 parts of ethylene glycol dimethacrylate, 1 part of ammonium persulfate and 1 part of ethanol.

[0053] Embodiment 2:

[0054] The invention discloses an environmentally friendly cutting fluid and a preparation method thereof, comprising the following components by weight: 25 parts of base oil; 4 parts of active agent; 7 parts of anti-wear agent; 3 parts of rust inhibitor; 2 parts of anti-volatile agent; 1 part of pH regulator; 4 parts of bactericide; 60 parts of ionized water;

[0055] The raw material components of the anti-volatile agent include: 15 parts of polyvinyl alcohol, 7 parts of ethyl acrylate, 5 parts of ethylene glycol dimethacrylate, 2 parts of ammonium persulfate, and 2 parts of ethanol.

[0056] Embodiment three:

[0057] The invention discloses an environmentally friendly cutting fluid and a preparation method thereof, comprising the following components by weight: 29 parts of base oil; 4 parts of active agent; 9 parts of anti-wear agent; 4 parts of rust inhibitor; 3 parts of anti-volatile agent; 2 parts of pH regulator; 5 parts of bactericide; and 50 parts of ionized water.

[0058] The raw material components of the anti-volatile agent include: 20 parts of polyvinyl alcohol, 10 parts of ethyl acrylate, 7 parts of ethylene glycol dimethacrylate, 3 parts of ammonium persulfate, and 3 parts of ethanol.

[0059] Comparative Example 1:

[0060] The invention discloses an environmentally friendly cutting fluid and a preparation method thereof, comprising the following components by weight: 20 parts of base oil; 3 parts of active agent; 5 parts of anti-wear agent; 2 parts of rust inhibitor; 1.23 parts of anti-volatile agent; 1 part of pH regulator; 3 parts of bactericide; 80 parts of ionized water;

[0061] The raw material components of the anti-volatile agent include: 13 parts of polyvinyl alcohol, 7 parts of ethyl acrylate, 3 parts of ethylene glycol dimethacrylate, 1 part of ammonium persulfate, and 1 part of ethanol.

[0062] Comparative Example 2:

[0063] The invention discloses an environmentally friendly cutting fluid and a preparation method thereof, comprising the following components by weight: 20 parts of base oil; 3 parts of active agent; 5 parts of anti-wear agent; 2 parts of rust inhibitor; 2 parts of anti-volatile agent; 1 part of pH regulator; 3 parts of bactericide; 80 parts of ionized water;

[0064] The raw material components of the anti-volatile agent include: 15 parts of polyvinyl alcohol, 8 parts of ethyl acrylate, 3 parts of ethylene glycol dimethacrylate, 1 part of ammonium persulfate, and 1 part of ethanol.

[0065] Comparative Example 3:

[0066] The invention discloses an environmentally friendly cutting fluid and a preparation method thereof, comprising the following components by weight: 20 parts of base oil; 3 parts of active agent; 5 parts of anti-wear agent; 2 parts of rust inhibitor; 1.23 parts of anti-volatile agent; 1 part of pH regulator; 3 parts of bactericide; 80 parts of ionized water;

[0067] The raw material components of the anti-volatile agent include: 20 parts of polyvinyl alcohol, 7 parts of ethyl acrylate, 3 parts of ethylene glycol dimethacrylate, 1 part of ammonium persulfate and 1 part of ethanol.

[0068] The specific materials of each component used in this embodiment are the same as those in embodiment 3.

[0069] The performance test results of the environmentally friendly cutting oils provided in Examples 1 to 3 and Comparative Examples 1 to 3 are shown in the following table:

[0070]

[0071]

[0072] From the test results in the above table, we can see that:

[0073] Compared with Example 1, since the high content of polyvinyl alcohol in Comparative Example 1 exceeds the range described in the present invention, the pH value increases and the maximum no-seizure load Pв value / N decreases, indicating that the polyvinyl alcohol in the present invention has excellent stability and lubrication performance within the proportion range described in the present invention, and does not reduce the rust resistance and defoaming properties.

[0074] Compared with Example 2, the above results show that the rust-proof cutting fluid prepared by the present invention has excellent rust-proof performance, can provide good protection for cutting processing, and can be used without affecting the performance of the cutting fluid. Adding polyvinyl alcohol in the cutting fluid is more energy-saving and environmentally friendly; at the same time, by adding ethylene glycol dimethacrylate and ammonium persulfate, a synergistic effect is achieved, which can effectively improve the anti-volatility performance of the cutting fluid.

[0075] Compared with Example 3, since the high content of polyvinyl alcohol in Comparative Example 1 exceeds the range described in the present invention, the pH value increases and the maximum no-seizure load Pв value / N decreases, indicating that the polyvinyl alcohol in the present invention has excellent stability and lubrication performance within the proportion range described in the present invention, and does not reduce the rust resistance and defoaming properties.

[0076] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0077] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. An environmentally friendly cutting fluid, characterized in that: include: Base oil: 20-30 parts; Active agent: 3-5 parts; Antiwear agent: 5-10 parts; Rust inhibitor: 2-5 parts; Anti-volatile agent: 1-3 parts; pH adjuster: 1-2 parts; Fungicide: 3-5 parts; The balance is deionized water; The raw material components of the anti-volatile agent include: 10-20 parts of polyvinyl alcohol, 5-10 parts of ethyl acrylate, 3-7 parts of ethylene glycol dimethacrylate, 1-3 parts of ammonium persulfate, and 1-3 parts of ethanol.

2. An environmentally friendly cutting fluid as claimed in claim 1, characterized in that: The base oil is selected from one or more of polyethylene glycol and poly-α-olefin.

3. An environmentally friendly cutting fluid as claimed in claim 2, characterized in that: The active agent is selected from any one of anionic surfactants and nonionic surfactants; the anionic surfactant accounts for 5-10 parts of the total; the nonionic surfactant accounts for 3-5 parts of the total; the anionic surfactant is selected from one or more of sodium dodecyl sulfate, alkylbenzene sulfonate, and sulfate ester salt.

4. An environmentally friendly cutting fluid as claimed in claim 3, characterized in that: The anti-wear agent is sulphurized fat.

5. An environmentally friendly cutting fluid as claimed in claim 4, characterized in that: The rust inhibitor is borate.

6. An environmentally friendly cutting fluid as claimed in claim 1, characterized in that: The bactericide is 1,2-benzisothiazolin-3-one.

7. An environmentally friendly cutting fluid and a preparation method thereof according to any one of claims 1 to 6, characterized in that: Step S1: preparing an anti-volatile agent: adding polyvinyl alcohol, ethyl acrylate, ethylene glycol dimethacrylate and ammonium persulfate into ethanol in a certain proportion, heating to 70° C., and continuing to stir and react at 70° C. for 4 hours to obtain an anti-volatile agent; Step S2: preparing cutting fluid: adding cooled anti-volatile agent to deionized water, stirring evenly, heating in a water bath to 50-70°C, adding active agent, anti-wear agent, rust inhibitor, bactericide, pH adjuster in sequence under stirring, stirring evenly after adding each reagent before adding the next reagent, after all reagents are added completely, continue stirring evenly and filter to obtain environmentally friendly cutting fluid.

8. An environmentally friendly cutting fluid as claimed in claim 7, characterized in that: The speed of the mechanical mixer is 1600-1800 revolutions per minute. After stirring for 4 hours, the viscosity of the anti-volatile agent is required to be 30-450mm2 / s.

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