Chip precision cutting protection liquid and preparation method thereof

Abstract

The present invention relates to a chip precision cutting protection liquid, specifically, to a chip precision cutting protection liquid and a preparation method thereof. The invention comprises the following raw materials in parts by weight: 50-80 parts of a composite lubricant, 1-5 parts of a friction reducer, 0.1-5 parts of a rust inhibitor, 2-11 parts of a heat absorbent and 20-40 parts of a solvent, and the balance is deionized water; the protection liquid prepared by the present invention using the raw materials is a water-based cutting fluid, which has a faster heat absorption and cooling efficiency than traditional water-based cutting fluids, a better lubrication effect, and is better than general oil-based cutting fluids, the heat absorbent used has good light shielding properties, and is very suitable for laser cutting processes, the combination of carbon black and metal materials makes the heat absorption effect significant, the cooling speed is faster, and the filler used for the composite lubricant has a certain film layer reinforcement function.

Description

Technical Field

[0001] The invention relates to a chip precision cutting protection liquid, in particular to a chip precision cutting protection liquid with rapid heat absorption and a preparation method thereof. Background Art

[0002] Before manufacturing, chips are usually cut due to their different sizes. Due to the need to improve the precision of cutting, the existing chip cutting has evolved from the original simple blade cutting to laser cutting and plasma cutting. However, when the laser is irradiated and cut along the cutting path of the chip, the heat energy generated is easily absorbed by the wafer. After the heat energy is absorbed, it is easy to cause silicon to melt or thermally decompose, and silicon vapor is generated and condensed and deposited on the chip, causing chips to be generated around the edge of the chip. With the development of plasma etching technology, it is sometimes necessary to etch at a higher operating temperature. In addition, due to the narrowing of the chip cutting path width and the high-precision semiconductor cutting device, some thermal effect problems will be brought about during use, such as the cutting path cracking and breaking due to heat, and the thermal decomposition of the protective film leading to the direct exposure of the chip. These problems require the protective film to have relatively high thermal stability.

[0003] The current cutting protection fluid generally uses traditional water-based cutting fluid. Compared with oil-based cutting fluid, water-based cutting fluid has poor lubricity but good cooling performance. However, the temperature during laser cutting is higher than that during wire cutting. Traditional water-based cutting fluid cannot be used in plasma cutting environments under high working temperature conditions. Therefore, the protection fluid needs to further improve its cooling performance to better cope with the high temperature during laser cutting. In addition, the improvement in cooling performance can improve the cutting efficiency and stability of the chip to a certain extent. In view of this, there is an urgent need for a chip laser precision cutting protection fluid with good cooling performance to improve the shortcomings of the existing technology. Summary of the invention

[0004] The object of the present invention is to provide a fast heat absorbing chip precision cutting protection liquid and a preparation method thereof, so as to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, on the one hand, the present invention provides a fast heat-absorbing chip precision cutting protection liquid, comprising the following raw materials in parts by weight: 50-80 parts of a composite lubricant, 1-5 parts of a friction reducer, 0.1-5 parts of a rust inhibitor, 2-11 parts of a heat absorber and 20-40 parts of a solvent, the remainder being deionized water.

[0006] As a further improvement of the present technical solution, the composite lubricant is preferably prepared by mixing triethanolamine, aliphatic dibasic acid and boric acid, and triethanolamine reacts with aliphatic dibasic acid and boric acid to synthesize carboxylates and borates, respectively, which are then compounded to form a lubricant with high-efficiency lubrication and anti-rust effects, and has good biodegradability.

[0007] As a further improvement of the present technical solution, the aliphatic dibasic acid is preferably sebacic acid.

[0008] As a further improvement of the present technical solution, the friction reducer is preferably a polyether, which is used to improve the wettability of the protective liquid, has high oil film strength, low friction coefficient, and good friction reduction and anti-wear properties. It also has a certain ability to inhibit foam and can also be used as a defoaming agent in the formulation of the present invention.

[0009] As a further improvement of the technical solution, the rust inhibitor is preferably oleic acid diethanolamide borate, which is prepared from oleic acid, diethanolamine and boric acid and has excellent lubrication and rust prevention functions.

[0010] As a further improvement of the present technical solution, the heat absorbent preferably uses nano carbon black and nano metal materials. The nano metal material uses at least one of nano copper, nano aluminum and nano iron. Carbon black has strong light shielding properties and can reduce the adsorption effect of heat generated during laser cutting. Secondly, the nano metal materials used have good thermal adsorption effects. When used in the protective liquid as a heat absorbent, carbon black can be used to quickly absorb heat and improve cooling efficiency. At the same time, nano carbon black and nano metal materials can also be used as composite lubricant fillers to make the prepared protective liquid have better surface strength after film formation and reduce the breakage rate during the cutting process.

[0011] As a further improvement of the technical solution, the solvent is at least one of anhydrous ethanol, methanol, isopropanol, ether, butyl acetate and ethyl acetate.

[0012] On the other hand, the present invention provides a method for preparing the fast heat absorption chip precision cutting protection liquid as described in any one of the above, comprising the following steps:

[0013] S1, prepare composite lubricant and rust inhibitor, and then weigh each raw material for standby use;

[0014] S2. Use a container with a stirring device to add the composite lubricant, friction reducer, rust inhibitor, heat absorbent, solvent and the remaining deionized water in sequence and mix them evenly;

[0015] S3. After standing to defoam, a protective solution is prepared.

[0016] Preferably, in S2, the stirring rate is 300-400 r / min, and the mixing time is 1-2 h.

[0017] Compared with the prior art, the fast heat absorption chip precision cutting protection liquid and the preparation method thereof provided by the present invention have the following beneficial effects:

[0018] 1. The protective fluid made from various raw materials is a water-based cutting fluid. Compared with traditional water-based cutting fluids, this product has faster heat absorption and cooling efficiency, better lubrication effect, and is better than general oil-based cutting fluids.

[0019] 2. The composite lubricant used has high-efficiency lubrication and anti-rust effects, and has good biodegradability. The anti-rust agent used has anti-rust effects and good lubrication properties, which further improves the lubrication effect of the protective fluid and improves the problem of poor lubrication effect of traditional water-based cutting fluids.

[0020] 3. The heat absorber used has good light shielding properties and is very suitable for laser cutting processes. The combination of carbon black and metal materials makes the heat absorption effect significant and the cooling speed faster. The filler used in the composite lubricant has a certain film reinforcement function. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a flowchart of the overall process of the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0023] The embodiment of the present invention provides a fast heat absorbing chip precision cutting protection liquid, comprising the following raw materials in parts by weight: 50-80 parts of composite lubricant, 1-5 parts of friction reducer, 0.1-5 parts of rust inhibitor, 2-11 parts of heat absorber and 20-40 parts of solvent, and the balance is deionized water.

[0024] On the basis of the above:

[0025] The composite lubricant is preferably prepared by mixing triethanolamine, aliphatic dibasic acid and boric acid. Triethanolamine reacts with aliphatic dibasic acid and boric acid to synthesize carboxylates and borates respectively, and then the two are compounded to form a lubricant with high-efficiency lubrication and anti-rust effects, and has good biodegradability. Among them, the aliphatic dibasic acid is preferably sebacic acid.

[0026] The friction reducer is preferably polyether, which is used to improve the wettability of the protective liquid, has high oil film strength, low friction coefficient, and good friction reduction and anti-wear properties. It also has a certain ability to inhibit foam and can also be used as a defoaming agent in the formulation of the present invention.

[0027] The rust inhibitor is preferably oleic acid diethanolamide borate, which is prepared from oleic acid, diethanolamine and boric acid and has excellent lubrication and rust prevention functions.

[0028] The heat absorber preferably adopts nano carbon black and nano metal materials, among which the nano metal material adopts at least one of nano copper, nano aluminum and nano iron. Carbon black has strong light shielding property, which can reduce the adsorption effect of heat generated during laser cutting. Secondly, the nano metal materials used have good heat adsorption effect. When used in the protective liquid as a heat absorber, carbon black can be used to absorb heat quickly and improve cooling efficiency. At the same time, nano carbon black and nano metal materials can also be used as composite lubricant fillers, so that the surface strength of the prepared protective liquid after film formation is better, reducing the breakage rate during cutting.

[0029] The solvent is at least one of anhydrous ethanol, methanol, isopropanol, ether, butyl acetate and ethyl acetate, which is non-flammable and volatile, and secondly has low toxicity. It can be used in the protective liquid to accelerate the film-forming speed of the protective liquid.

[0030] In the present invention, the protective fluid prepared by using various raw materials is a water-based cutting fluid. Compared with traditional water-based cutting fluids, this product has faster heat absorption and cooling efficiency, better lubrication effect, and is better than general oil-based cutting fluids; the composite lubricant used has high-efficiency lubrication performance and rust prevention effect, and has good biodegradability. The rust inhibitor used has rust prevention effect and good lubrication performance, which further improves the lubrication effect of the protective fluid and improves the problem of poor lubrication effect of traditional water-based cutting fluids. Secondly, the heat absorbent used has good light shielding properties and is very suitable for laser cutting technology. The combination of carbon black and metal materials makes the heat absorption effect significant and the cooling speed faster. In addition, the filler used for the composite lubricant has a certain film layer reinforcement function.

[0031] according to Figure 1 As shown, the embodiment of the present invention also provides a method for preparing the above-mentioned fast heat absorption chip precision cutting protection liquid, and the specific steps are as follows:

[0032] (1) Prepare a composite lubricant and a rust inhibitor, and then weigh each raw material for later use;

[0033] (2) Use a container with a stirring device to add the composite lubricant, friction reducer, rust inhibitor, heat absorber, solvent and the remaining deionized water in sequence, and mix them evenly for 1-2 hours at a stirring rate of 300-400r / min;

[0034] (3) After standing for 10-20 minutes to eliminate the foam, the protective solution is prepared.

[0035] According to different raw material dosages, the fast heat absorption chip precision cutting protection liquid provided by the present invention is further described through the following specific examples. Example 1

[0036] (1) Prepare a composite lubricant and a rust inhibitor, and then weigh each raw material for later use;

[0037] (2) Use a container with a stirring device to add 50 parts of composite lubricant, 1 part of friction reducer, 0.1 part of rust inhibitor, 2 parts of heat absorbent, 20 parts of solvent and the balance of deionized water in sequence, and mix evenly for 2 hours at a stirring rate of 300 r / min;

[0038] (3) After standing for 20 minutes to eliminate the foam, the protective solution is prepared. Example 2

[0039] (1) Prepare a composite lubricant and a rust inhibitor, and then weigh each raw material for later use;

[0040] (2) Use a container with a stirring device to add 65 parts of composite lubricant, 3 parts of friction reducer, 3 parts of rust inhibitor, 7 parts of heat absorbent, 30 parts of solvent and the balance of deionized water in sequence, and mix evenly for 1.5 hours at a stirring rate of 350 r / min;

[0041] (3) After standing for 15 minutes to eliminate the foam, the protective solution is prepared. Example 3

[0042] (1) Prepare a composite lubricant and a rust inhibitor, and then weigh each raw material for later use;

[0043] (2) Use a container with a stirring device to add 80 parts of composite lubricant, 5 parts of friction reducer, 5 parts of rust inhibitor, 11 parts of heat absorbent, 40 parts of solvent and the balance of deionized water in sequence, and mix evenly for 2 hours at a stirring rate of 400 r / min;

[0044] (3) After standing for 20 minutes to eliminate the foam, the protective solution is prepared. Example 4

[0045] (1) Prepare a composite lubricant and a rust inhibitor, and then weigh each raw material for later use;

[0046] (2) Use a container with a stirring device to add 80 parts of composite lubricant, 1 part of friction reducer, 0.1 part of rust inhibitor, 2 parts of heat absorbent, 40 parts of solvent and the balance of deionized water in sequence, and mix evenly for 1 hour at a stirring rate of 400 r / min;

[0047] (3) After standing for 10 minutes to eliminate the foam, the protective solution is prepared. Example 5

[0048] (1) Prepare a composite lubricant and a rust inhibitor, and then weigh each raw material for later use;

[0049] (2) Use a container with a stirring device to add 70 parts of composite lubricant, 4 parts of friction reducer, 4 parts of rust inhibitor, 8 parts of heat absorbent, 35 parts of solvent and the balance of deionized water in sequence, and mix evenly for 1.5 hours at a stirring rate of 400 r / min;

[0050] (3) After standing for 15 minutes to eliminate the foam, the protective solution is prepared.

[0051] Table 1 Amount of each raw material used in Examples 1-5 (parts)

[0052] Example 1 Example 2 Example 3 Example 4 Example 5 Composite lubricant 50 65 80 80 70 Friction reducer 1 3 5 1 4 Rust inhibitor 0.1 3 5 0.1 4 Heat absorber 2 7 11 2 8 Solvents 20 30 40 40 35

[0053] In order to verify that the fast heat absorption chip precision cutting protection liquid prepared in the embodiment of the present invention has good lubricity and heat absorption, the fast heat absorption chip precision cutting protection liquid provided in the embodiment of the present invention is compared and explained through the following comparative examples.

[0054] Comparative Example 1

[0055] This comparative example adopts the preparation method of Example 1, except for the preparation and addition of the composite lubricant, and replaces it with a traditional base oil, the addition amount of which is 50 parts, and the other raw materials and methods remain unchanged. The specific steps are as follows:

[0056] (1) Prepare the rust inhibitor, and then weigh the raw materials for later use;

[0057] (2) Use a container with a stirring device to add 50 parts of base oil, 1 part of friction reducer, 0.1 part of rust inhibitor, 2 parts of heat absorbent, 20 parts of solvent and the balance of deionized water in sequence, and mix evenly for 2 hours at a stirring rate of 300 r / min;

[0058] (3) After standing for 20 minutes to eliminate the foam, the protective solution is prepared.

[0059] Comparative Example 2

[0060] This comparative example adopts the preparation method of Example 2, except for the preparation and addition of the composite lubricant, and replaces it with a traditional base oil with an addition amount of 65 parts. The other raw materials and methods remain unchanged, and the specific steps are similar to those of Comparative Example 1, which will not be repeated in this comparative example.

[0061] Comparative Example 3

[0062] This comparative example adopts the preparation method of Example 3, removes the preparation and addition of the composite lubricant, and replaces it with a traditional base oil with an addition amount of 80 parts. The other raw materials and methods remain unchanged. The specific steps are similar to those of Comparative Example 1, and this comparative example will not be repeated.

[0063] Comparative Example 4

[0064] This comparative example adopts the preparation method of Example 4, except for the preparation and addition of the composite lubricant, and replaces it with a traditional base oil with an addition amount of 80 parts. The other raw materials and methods remain unchanged, and the specific steps are similar to those of Comparative Example 1, which will not be repeated in this comparative example.

[0065] Comparative Example 5

[0066] This comparative example adopts the preparation method of Example 5, removes the preparation and addition of the composite lubricant, and replaces it with a traditional base oil with an addition amount of 70 parts. The other raw materials and methods remain unchanged. The specific steps are similar to those of Comparative Example 1, and this comparative example will not be repeated.

[0067] Table 2 Amount of each raw material used in Comparative Examples 1-5 (parts)

[0068] Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Base oil 50 65 80 80 70 Friction reducer 1 3 5 1 4 Rust inhibitor 0.1 3 5 0.1 4 Heat absorber 2 7 11 2 8 Solvents 20 30 40 40 35

[0069] Comparative Example 6

[0070] This comparative example adopts the preparation method of Example 1, except for the addition of the heat absorbent, and the other raw materials and methods remain unchanged. The specific steps are as follows:

[0071] (1) Prepare a composite lubricant and a rust inhibitor, and then weigh each raw material for later use;

[0072] (2) Use a container with a stirring device to add 50 parts of composite lubricant, 1 part of friction reducer, 0.1 part of rust inhibitor, 20 parts of solvent and the balance of deionized water in sequence, and mix evenly for 2 hours at a stirring rate of 300 r / min;

[0073] (3) After standing for 20 minutes to eliminate the foam, the protective solution is prepared.

[0074] Comparative Example 7

[0075] This comparative example adopts the preparation method of Example 2, except for the addition of the heat absorbent, and the other raw materials and methods remain unchanged. The specific steps are similar to those of Comparative Example 6, and will not be repeated in this comparative example.

[0076] Comparative Example 8

[0077] This comparative example adopts the preparation method of Example 3, except for the addition of the heat absorbent, and the other raw materials and methods remain unchanged. The specific steps are similar to those of Comparative Example 6, and this comparative example will not be repeated.

[0078] Comparative Example 9

[0079] This comparative example adopts the preparation method of Example 4, except for the addition of the heat absorbent, and the other raw materials and methods remain unchanged. The specific steps are similar to those of Comparative Example 6, and this comparative example will not be repeated.

[0080] Comparative Example 10

[0081] This comparative example adopts the preparation method of Example 5, except for the addition of the heat absorbent, and the other raw materials and methods remain unchanged. The specific steps are similar to those of Comparative Example 6, and this comparative example will not be repeated.

[0082] Table 3 Amount of each raw material used in Comparative Examples 6-10 (parts)

[0083] Comparative Example 6 Comparative Example 7 Comparative Example 8 Comparative Example 9 Comparative Example 10 Composite lubricant 50 65 80 80 70 Friction reducer 1 3 5 1 4 Rust inhibitor 0.1 3 5 0.1 4 Heat absorber / / / / / Solvents 20 30 40 40 35

[0084] Comparative Example 11

[0085] This comparative example adopts the preparation method of Example 1, changes the amount of the heat absorbent, specifically 0.5 parts, and the other raw materials and methods remain unchanged. The specific steps are as follows:

[0086] (1) Prepare a composite lubricant and a rust inhibitor, and then weigh each raw material for later use;

[0087] (2) Use a container with a stirring device to add 50 parts of composite lubricant, 1 part of friction reducer, 0.1 part of rust inhibitor, 0.5 part of heat absorbent, 20 parts of solvent and the balance of deionized water in sequence, and mix evenly for 2 hours at a stirring rate of 300 r / min;

[0088] (3) After standing for 20 minutes to eliminate the foam, the protective solution is prepared.

[0089] Comparative Example 12

[0090] This comparative example adopts the preparation method of Example 2, changes the amount of the endothermic agent, specifically 1.5 parts, and the other raw materials and methods remain unchanged. The specific steps are similar to those of Comparative Example 11, and this comparative example will not be repeated.

[0091] Comparative Example 13

[0092] This comparative example adopts the preparation method of Example 3, changes the amount of the endothermic agent, specifically 13 parts, and the other raw materials and methods remain unchanged. The specific steps are similar to those of Comparative Example 11, and this comparative example will not be repeated.

[0093] Comparative Example 14

[0094] This comparative example adopts the preparation method of Example 4, changes the amount of the endothermic agent, specifically 1 part, and the other raw materials and methods remain unchanged. The specific steps are similar to those of Comparative Example 11, and this comparative example will not be repeated.

[0095] Comparative Example 15

[0096] This comparative example adopts the preparation method of Example 5, changes the amount of the endothermic agent, specifically 13 parts, and the other raw materials and methods remain unchanged. The specific steps are similar to those of Comparative Example 11, and this comparative example will not be repeated.

[0097] The amounts of the raw materials used in the above comparative examples 11-15 are shown in Table 4;

[0098] Table 4 Amount of each raw material used in Comparative Examples 11-15 (parts)

[0099] Comparative Example 11 Comparative Example 12 Comparative Example 13 Comparative Example 14 Comparative Example 15 Composite lubricant 50 65 80 80 70 Friction reducer 1 3 5 1 4 Rust inhibitor 0.1 3 5 0.1 4 Heat absorber 0.5 1.5 13 1 13 Solvents 20 30 40 40 35

[0100] Test example

[0101] This test example tests the lubricity and cooling properties of the protection liquids provided in Examples 1-5 and Comparative Examples 1-15 of the present invention; Lubricity: Each protection liquid was diluted with water to a concentration of 15%, and then tested using a tapping torque meter; Cooling: Each protection liquid was diluted with water to a concentration of 15%, and then the protection liquid temperature was increased from 20°C to 50°C. The heat absorbed (1 cubic meter of cutting fluid was heated from 20°C to 50°C by a 1000W heating plate, and the absorbed heat was calculated based on the heating time), specific test indicators are shown in Tables 5 to 7.

[0102] Table 5 Test indicators of samples in Examples 1-5

[0103] Example 1 Example 2 Example 3 Example 4 Example 5 Lubricity (N / cm) 153.8 151.4 147.5 149.3 151.1 Absorbed heat (J) <![CDATA[4.6×10 8 ]]> <![CDATA[4.7×10 8 ]]> <![CDATA[5.3×10 8 ]]> <![CDATA[4.4×10 8 ]]> <![CDATA[4.9×10 8 ]]>

[0104] Table 6 Test indicators of samples in comparative examples 1-5

[0105] Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Lubricity (N / cm) 207.8 205.3 201.5 202.4 203.9 Absorbed heat (J) <![CDATA[3.7×10 8 ]]> <![CDATA[4.1×10 8 ]]> <![CDATA[4.1×10 8 ]]> <![CDATA[3.8×10 8 ]]> <![CDATA[3.9×10 8 ]]>

[0106] As shown in Tables 5 and 6, the protection liquid provided in Examples 1-5 of the present invention has good lubrication performance and strong heat absorption compared to the protection liquid provided in Comparative Examples 1-5. After removing the addition of the composite lubricant, the lubrication performance of the protection liquid in Comparative Examples 1-5 is greatly reduced, and the heat absorption also decreases to varying degrees, indicating that the addition of the composite lubricant in the present invention is an important factor affecting the lubricity of the protection liquid.

[0107] Table 7 Test indicators of samples in comparative examples 6-10

[0108] Comparative Example 6 Comparative Example 7 Comparative Example 8 Comparative Example 9 Comparative Example 10 Lubricity (N / cm) 177.3 169.7 166.6 170.5 172.4 Absorbed heat (J) <![CDATA[0.97×10 8 ]]> <![CDATA[1.08×10 8 ]]> <![CDATA[1.31×10 8 ]]> <![CDATA[1.24×10 8 ]]> <![CDATA[1.18×10 8 ]]>

[0109] As shown in Table 7, when the heat absorber is removed from the protective liquid in Comparative Examples 6-10 of the present invention, the heat absorption of the protective liquid is greatly reduced, and the lubricity is also reduced to varying degrees, indicating that the addition of the heat absorber is an important factor affecting the heat absorption and lubricity of the protective liquid in the present invention.

[0110] Table 8 Test indicators of samples in comparative examples 11-15

[0111] Comparative Example 11 Comparative Example 12 Comparative Example 13 Comparative Example 14 Comparative Example 15 Lubricity (N / cm) 159.1 157.6 161.1 154.9 163.5 Absorbed heat (J) <![CDATA[3.9×10 8 ]]> <![CDATA[4.3×10 8 ]]> <![CDATA[5.2×10 8 ]]> <![CDATA[3.9×10 8 ]]> <![CDATA[4.9×10 8 ]]>

[0112] As shown in Table 8, when the amount of the protective liquid in Comparative Examples 11-15 of the present invention is changed, when the amount of the endothermic agent is less than 2 parts, the endothermic effect decreases and the lubrication performance decreases. When the amount of the endothermic agent is higher than 11 parts, the endothermic effect does not increase significantly and the lubrication performance decreases, indicating that the amount of the endothermic agent used in the present invention is a factor that affects the lubricity and endothermic properties of the protective liquid.

[0113] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A chip precision cutting protection liquid, characterized in that: The method comprises the following raw materials in parts by weight: 50-80 parts of a composite lubricant, 1-5 parts of a friction reducer, 0.1-5 parts of a rust inhibitor, 2-11 parts of a heat absorbent and 20-40 parts of a solvent, and the balance is deionized water; The composite lubricant is prepared by mixing triethanolamine, aliphatic dibasic acid and boric acid; The heat absorbent is made of nano carbon black and nano metal materials; The nano-metal material is at least one of nano-copper, nano-aluminum and nano-iron; The solvent is at least one of anhydrous ethanol, methanol, isopropanol, ether, butyl acetate and ethyl acetate; The aliphatic dibasic acid is sebacic acid; The rust inhibitor is oleic acid diethanolamide borate, and the oleic acid diethanolamide borate is prepared from oleic acid, diethanolamine and boric acid.

2. The chip precision cutting protection liquid according to claim 1, characterized in that: The friction reducer is polyether.

3. A method for preparing a chip precision cutting protection liquid as claimed in any one of claims 1 to 2, characterized in that: The following steps are involved: S1, prepare composite lubricant and rust inhibitor, and then weigh each raw material for standby use; S2. Use a container with a stirring device to add the composite lubricant, friction reducer, rust inhibitor, heat absorbent, solvent and the remaining deionized water in sequence and mix them evenly; S3. After standing to defoam, a protective solution is prepared.

4. The method for preparing chip precision cutting protection liquid according to claim 3, characterized in that: In S2, the stirring rate is 300-400 r / min, and the mixing time is 1-2 h.

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