Aqueous cutting fluid and method of preparation and use thereof

Abstract

The application discloses a kind of water-based cutting fluid and its preparation method and application.A kind of water-based cutting fluid, including the following mass concentration components: 10-60g / L lubricant, 30-65g / L surfactant, 0.5-3g / L metal antirust agent, 0.1-2g / L mildew preventive, 4-10g / L alcohol amine substance, 5-20g / L wetting agent;Lubricant includes at least one of hydrophilic silicone oil, petroleum sulfonate;Surfactant includes fatty acid methyl ester, NP-10 and solubilizer;Metal antirust agent includes benzotriazole;Wetting agent includes polyether polyol.The cutting fluid of the application has excellent rust-proof performance, rust-proof time is more than three months, and no white spot is generated on the aluminum surface.The cutting fluid solution of the application is clear and transparent, has good visibility, is especially suitable for use on modern machining equipment such as numerical control machine tool and machining center, and realizes the automation of operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cutting fluid, in particular to a water-based cutting fluid and a preparation method and application thereof. BACKGROUND

[0002] V-Cut refers to cutting a split line in advance at a specific position of a printed circuit board (PCB) by a rotary knife, and the purpose is to facilitate subsequent De-panel of the SMT circuit board after assembly. Because the shape after cutting looks like an English V-shaped, it is named. The reason why V-Cut needs to be designed on the circuit board is that the circuit board (PCB) itself has a certain strength and hardness, especially the metal aluminum substrate. In the V-Cut process of the aluminum substrate, several categories commonly used on the market are oil-based cutting fluid, alcohol, emulsified kerosene, etc. The above products all have different shortcomings or safety hazards. The oil-based cutting fluid mainly includes vulcanized cutting oil, drawing oil, stamping oil, honing oil, etc. The advantages of oil-based cutting fluid are better lubrication than water-based, no burr, the disadvantages are high cost, difficult to clean, poor heat dissipation, easy to stick aluminum chips, difficult to remove chips, difficult to handle after entering the wastewater system, and pollution. Some oil-based cutting fluid is flammable. The alcohol cutting fluid is a mixture of industrial alcohol and water with a concentration of about 50%. The advantages are no burr and fast drying after use. The disadvantages are high cost and high risk. The emulsified kerosene cutting fluid is a complex emulsion of kerosene, water and other organic components. The advantages are good lubrication, no burr and relatively low price. The disadvantages are strong odor, easy to cause red rash, cause employee hand skin cracking and injury in winter, difficult to clean, and environmental pollution.

[0003] Therefore, it is necessary to develop a new water-based cutting fluid to solve the problems of existing oil-based cutting fluid, alcohol cutting fluid and emulsified kerosene cutting fluid. SUMMARY

[0004] In order to overcome the problems of non-environmental protection and high cost of the existing cutting fluid, the present application provides a water-based cutting fluid in the first aspect, a preparation method of the water-based cutting fluid in the second aspect, and an application of the water-based cutting fluid in the third aspect.

[0005] In order to achieve the above purpose, the technical scheme adopted by the present application is:

[0006] The first aspect of the present application provides a water-based cutting fluid, which comprises the following components with the following mass concentrations:

[0007] 10-60g / L lubricant, 30-65g / L surfactant, 0.5-3g / L metal antirust agent, 0.1-2g / L mildew-proof agent, 4-10g / L alcohol amine, 5-20g / L wetting agent;

[0008] The lubricant comprises at least one of hydrophilic silicone oil and petroleum sulfonate;

[0009] The surfactant comprises fatty acid methyl ester, NP-10 and solubilizer;

[0010] The metal antirust agent comprises benzotriazole;

[0011] The wetting agent comprises polyether polyol.

[0012] Preferably, the aqueous cutting fluid comprises the following components by mass concentration: 15-60g / L lubricant, 30-60g / L surfactant, 0.5-3g / L metal antirust agent, 0.5-1.5g / L mildew-proof agent, 4-10g / L alcohol amine, 5-20g / L wetting agent.

[0013] Preferably, in the aqueous cutting fluid, the lubricant comprises hydrophilic silicone oil and petroleum sulfonate, and the mass ratio of the hydrophilic silicone oil to the petroleum sulfonate is 1:(0.1-2); further preferably, the mass ratio of the hydrophilic silicone oil to the petroleum sulfonate is 1:(0.2-1.5); in a specific embodiment of the present application, the optimal mass ratio of the hydrophilic silicone oil to the petroleum sulfonate is 1:1.5; when the aqueous cutting fluid prepared by using the hydrophilic silicone oil and the petroleum sulfonate in combination is sprayed on the surface of aluminum and the surface of a blade, an oil film is formed on the cutting surface, which blocks the air from entering the cutting surface, thereby ensuring that oxidation does not occur during cutting; at the same time, the product contains moisture and moisturizing ingredients, which can take away a large amount of heat generated during cutting, thereby reducing the temperature of the cutting surface and the blade to the lowest and prolonging the service life of the tool.

[0014] Further preferably, the raw materials of the aqueous cutting fluid comprise the following components by mass concentration:

[0015] 8-30g / L hydrophilic silicone oil, 7-30g / L petroleum sulfonate, 5-15g / L fatty acid methyl ester, 15-30g / L NP-10, 10-15g / L solubilizer, 1-2.5g / L metal antirust agent, 0.5-1.5g / L mildew-proof agent, 4-10g / L alcohol amine, 5-20g / L wetting agent.

[0016] Preferably, the raw materials of the aqueous cutting fluid further comprise 0.1-10g / L extreme pressure agent by mass concentration; further preferably, the raw materials further comprise 1-10g / L extreme pressure agent.

[0017] Further preferably, the extreme pressure agent comprises at least one of sulfurized isobutylene, sulfurized lard oil, sulfurized cottonseed oil, and dibenzyl disulfide; further preferably, the extreme pressure agent is sulfurized isobutylene.

[0018] Preferably, the water-based cutting fluid further comprises 0.1-2 g / L of a defoaming agent by mass concentration; further preferably, the water-based cutting fluid further comprises 0.5-1.5 g / L of a defoaming agent by mass concentration; the defoaming agent can be a commercially available conventional defoaming agent; in some embodiments of the present application, the defoaming agent is B226 silicon-free defoaming agent produced by Guangdong Zhonglian Federal Fine Chemicals.

[0019] Preferably, the water-based cutting fluid further comprises 0-10 g / L of chlorinated paraffin as a lubricant.

[0020] Preferably, the water-based cutting fluid comprises at least one of triethanolamine, monoethanolamine, and diethanolamine as the alcohol amine substance; further preferably, the water-based cutting fluid comprises triethanolamine as the alcohol amine substance; in the present application, triethanolamine is used as an emulsifier and a pH balancing agent; the colloid formed by triethanolamine and a higher fatty acid or a higher fatty alcohol has good phase stability, stable product quality, and a high proportion of additional components.

[0021] In some embodiments of the present application, benzotriazole used in the metal rust inhibitor is produced by Yangcherry Company, Germany; in the water-based cutting fluid composition of the present application, the metal rust inhibitor can further comprise a commercially available conventional metal rust inhibitor; in some embodiments of the present application, the metal rust inhibitor further comprises JF-3920 non-ferrous metal environmentally friendly rust inhibitor produced by Hanqiao Chemicals, Germany.

[0022] In some embodiments of the present application, the water-based cutting fluid can further comprise an organic silver antibacterial agent.

[0023] Preferably, the water-based cutting fluid comprises at least one of kathon and sodium diacetate as the mildew inhibitor.

[0024] In some embodiments of the present application, the water-based cutting fluid comprises M3102 hydroxypropyl methyl cellulose ether as the solubilizing agent.

[0025] The second aspect of the present application provides a preparation method of the water-based cutting fluid, comprising the following steps:

[0026] 1) mixing part of the water with the surfactant to obtain a mixed solution 1; mixing the lubricant and the alcohol amine substance to obtain a mixed solution 2; mixing the mixed solution 2 with the mixed solution 1 to obtain a reaction solution 1;

[0027] 2) mixing the remaining water, the metal rust inhibitor, the mildew inhibitor, the wetting agent, and other components to obtain a reaction solution 2; mixing the reaction solution 2 with the reaction solution 1 to obtain the water-based cutting fluid.

[0028] In the preparation method of the water-based cutting fluid, the preparation of the mixed solution 1 and the mixed solution 2 in step 1) can be carried out simultaneously.

[0029] Preferably, in the preparation method of the water-based cutting fluid, the temperature for stirring the mixture of the part of water and the surfactant in step 1) is 55-90℃; more preferably, the temperature for stirring the mixture of the part of water and the surfactant is 60-85℃.

[0030] Preferably, in the preparation method of the water-based cutting fluid, the time for stirring the mixture of the part of water and the surfactant in step 1) is 10-25min; more preferably, the time for stirring the mixture of the part of water and the surfactant is 15-20min.

[0031] Preferably, in the preparation method of the water-based cutting fluid, the temperature for mixing the mixed solution 2 and the mixed solution 1 in step 1) is 55-90℃; more preferably, the temperature for mixing the mixed solution 2 and the mixed solution 1 is 60-85℃.

[0032] Preferably, in the preparation method of the water-based cutting fluid, the time for mixing the mixed solution 2 and the mixed solution 1 in step 1) is 1.5-4.5h; more preferably, the time for mixing the mixed solution 2 and the mixed solution 1 is 2-4h.

[0033] Preferably, in the preparation method of the water-based cutting fluid, the temperature for mixing the remaining water, the metal rust inhibitor, the mildew inhibitor, the wetting agent and other components in step 2) is 55-90℃; more preferably, the temperature for mixing the remaining water, the metal rust inhibitor, the mildew inhibitor, the wetting agent and other components is 60-85℃.

[0034] Preferably, in the preparation method of the water-based cutting fluid, the time for mixing the reaction solution 2 and the reaction solution 1 in step 2) is 0.5-2.5h; more preferably, the time for mixing the reaction solution 2 and the reaction solution 1 is 1-2h.

[0035] In the preparation method of the water-based cutting fluid, after the reaction of the reaction solution 2 and the reaction solution 1 in step 2) is completed, the reaction solution is cooled to 30-45℃, and then filtered by using a filter to obtain the finished water-based cutting fluid.

[0036] The third aspect of the present application provides the application of the above-mentioned water-based cutting fluid in V-Cut of an aluminum substrate.

[0037] The water-based cutting fluid invented by the company is particularly suitable for the V-Cut process of an aluminum substrate, and can be used by manual spraying or through an automatic spraying system to realize automation of the use process, reduce labor, improve production efficiency, reduce the use amount of V-cut fluid, improve product quality, reduce production cost, and improve product competitiveness, without changing the original V-cut process and production process parameters (V-cut speed, cutter brand and model, cutting depth, etc.).

[0038] The present application has the following advantages:

[0039] The present application selects hydrophilic silicone oil and / or petroleum sulfonate as a lubricant, so that the cutting fluid of the present application has excellent lubricity.

[0040] The present application uses fatty acid methyl ester, NP-10 and a solubilizing agent in combination to further improve the lubricity of the water-based cutting fluid of the present application, improve surface processing precision, and create a good environment for operators.

[0041] The cutting fluid of the present application uses benzotriazole as a special additive, so that the cutting fluid of the present application has strong antibacterial property and has a long service life in a central system or a single tank, and can realize more than one year without odor and deterioration.

[0042] The cutting fluid of the present application has excellent rust prevention performance, and the rust prevention time is more than three months, and no white spots are generated on the aluminum surface.

[0043] The cutting fluid solution of the present application is clear and transparent, has good visibility, and is particularly suitable for use on modern machining equipment such as numerical control machine tools and machining centers to realize automation of operation.

[0044] The cutting fluid of the present application does not contain harmful components such as chlorine, triazine, secondary amine, aromatic hydrocarbon and sodium nitrite to the human body, has no skin irritation, and is friendly to operators.

[0045] The cutting fluid of the present application has excellent foam resistance and can be used in high-pressure and high-air release operation conditions, and is suitable for soft and hard water.

[0046] The cutting fluid of the present application has good oil discharge formula and good sedimentation, and provides rapid separation of cutting chips and cutting fines.

[0047] The cutting fluid of the present application has good cooling and cleaning properties, keeps the workpiece clean, and reduces the residue of sticky substances.

[0048] The cutting fluid of the present application has low preparation cost. BRIEF DESCRIPTION OF DRAWINGS

[0049] Figure 1 The finished product diagram made by using the water-based cutting fluid of Example 1.

[0050] Figure 2 The finished product picture for using the oily V-cutting fluid of Comparative Example 4.

[0051] Figure 3 The picture of the state after using the aqueous cutting fluid of Example 1 for 3 months.

[0052] Figure 4 The picture of the state after using the oily V-cutting fluid of Comparative Example 4 for 3 months.

[0053] Figure 5 The picture of the plate surface for using the oily V-cutting fluid of Comparative Example 4.

[0054] Figure 6 The picture of the plate surface for using the aqueous cutting fluid of Example 1. DETAILED DESCRIPTION

[0055] The content of the present application is further explained in detail by specific examples. The raw materials, reagents or devices used in the examples and comparative examples are commercially available or can be obtained by prior art methods unless otherwise specified. The test or test method is the conventional method in the art unless otherwise specified.

[0056] In the following examples, the solubilizing agent is M3102 hydroxypropyl methyl cellulose ether, the metal antirust agent is JF-3920 non-ferrous metal environmental protection antirust liquid produced by Hanqiao Chemical Industry in Germany, the mildew-proof agent is Kathon, and the defoaming agent is propanetriol random polyether.

[0057] Example 1

[0058] The aqueous cutting fluid provided in the present example, and the raw materials and contents are shown in Table 1 below:

[0059] Table 1

[0060]

[0061] The preparation method of the above aqueous cutting fluid provided in the present example comprises the following steps:

[0062] 1) 500 kg of deionized water is added into a 1# reaction kettle, stirred and heated to 80±5℃; fatty acid methyl ester, NP-10, solubilizing agent are slowly added according to the component content and stirred for 15-20 minutes to ensure that the above-mentioned substances are completely dispersed in water;

[0063] 2) hydrophilic silicone oil, petroleum sulfonate, triethanolamine, chlorinated paraffin are uniformly mixed in a liquid preparation mixer (this step can be carried out simultaneously with step 1)), after the substances in step 1) are completely dispersed and the temperature is raised to the set temperature, the above-mentioned mixed liquid is slowly added through a metering pump, this step cannot be added too fast, otherwise the reaction will not be timely, which will cause the product to easily stratify and affect the subsequent reaction process;

[0064] 3) After the above materials are added, the reaction is continued at 80±5°C for 2-4 hours to ensure that the raw materials have been completely reacted;

[0065] 4) The remaining components of deionized water (300 kg) are added to the 2# reactor, stirred and heated to 80±5°C; sulfurized isobutylene, metal antirust agent, mildew inhibitor, defoaming agent, polyether polyol and other components are added to the 2# reactor, stirred and heated for 10-20 minutes;

[0066] 5) The materials in the 2# reactor are slowly added to the 1# reactor through a metering pump, and the reaction is continued for 1-2 hours; after the reaction is completed, it is cooled to 40±2°C, filtered through a titanium rod filter, and then enters the finished product tank for further cooling before being packed in barrels.

[0067] Example 2

[0068] This example provides an aqueous cutting fluid, and the raw materials and contents are as shown in Table 2:

[0069] Table 2

[0070]

[0071] The aqueous cutting fluid of this example is prepared according to the formulation composition of Table 2 by referring to the preparation method of Example 1.

[0072] Example 3

[0073] This example provides an aqueous cutting fluid, and the raw materials and contents are as shown in Table 3:

[0074] Table 3

[0075]

[0076]

[0077] The aqueous cutting fluid of this example is prepared according to the formulation composition of Table 3 by referring to the preparation method of Example 1.

[0078] Example 4

[0079] This example provides an aqueous cutting fluid, and the raw materials and contents are as shown in Table 4:

[0080] Table 4

[0081]

[0082] The aqueous cutting fluid of this example is prepared according to the formulation composition of Table 4 by referring to the preparation method of Example 1.

[0083] Example 5

[0084] The present example provides an aqueous cutting fluid, raw materials and contents as follows Table 5:

[0085] Table 5

[0086]

[0087]

[0088] Referring to the preparation method of Example 1, the aqueous cutting fluid of the present example is prepared according to the formula composition of Table 5.

[0089] Example 6

[0090] The present example provides an aqueous cutting fluid, raw materials and contents as follows Table 6:

[0091] Table 6

[0092]

[0093] Referring to the preparation method of Example 1, the aqueous cutting fluid of the present example is prepared according to the formula composition of Table 6.

[0094] Example 7

[0095] The present example provides an aqueous cutting fluid, raw materials and contents as follows Table 7:

[0096] Table 7

[0097]

[0098] Referring to the preparation method of Example 1, the aqueous cutting fluid of the present example is prepared according to the formula composition of Table 7.

[0099] Example 8

[0100] The present example provides an aqueous cutting fluid, raw materials and contents as follows Table 8:

[0101] Table 8

[0102]

[0103]

[0104] Referring to the preparation method of Example 1, the aqueous cutting fluid of the present example is prepared according to the formula composition of Table 8.

[0105] Example 9

[0106] The present example provides an aqueous cutting fluid, raw materials and contents as follows Table 9:

[0107] Table 9

[0108]

[0109] The water-based cutting fluid of this example was prepared according to the formulation of Table 9 by referring to the preparation method of Example 1.

[0110] Example 10

[0111] This example provides a water-based cutting fluid, and the raw materials and contents are as shown in Table 10 below:

[0112] Table 10

[0113]

[0114]

[0115] The water-based cutting fluid of this example was prepared according to the formulation of Table 10 by referring to the preparation method of Example 1.

[0116] Comparative Example 1

[0117] Comparative Example 1 is an alcohol V-cutting fluid, and the specific formulation is: 50wt% alcohol + 50wt% water.

[0118] Comparative Example 2

[0119] Comparative Example 2 is a kerosene V-cutting fluid, and the specific formulation is: 100% kerosene.

[0120] Comparative Example 3

[0121] Comparative Example 3 is an emulsified kerosene V-cutting fluid, and the specific formulation is: 70-80wt% water + 10wt% kerosene emulsifier + 10-20wt% kerosene.

[0122] Comparative Example 4

[0123] Comparative Example 4 is a certain competitor's oil-based V-cutting fluid, and the specific formulation is: 100% No. 5 white oil.

[0124] The water-based cutting fluids of Examples 1-10 above and the V-cutting fluids of Comparative Examples 1-3 were used for V-cutting processing of aluminum substrate workpieces, and the results are shown in Table 11 below.

[0125] Table 11

[0126]

[0127]

[0128] Note: In the antibacterial performance item, some used agents, aluminum scraps and surrounding objects collected during the experiment were added with an equal amount of the original product under the same temperature and humidity conditions in the laboratory, and the data obtained after standing for 30 days were used as the conclusion.

[0129] Antioxidant performance

[0130] The finished product made by the inventive Example 1 using the water-based cutting fluid (V-cut fluid) is shown in Figure 1 , the cutting edge is clean and neat, and the original color of the metal is exposed without oxidation. The finished product made by the oil-based V-cut fluid of Comparative Example 4 is shown in Figure 2 , the cutting edge surface is gray and black. The water-based cutting fluid of the present application has good anti-oxidation function. During the V-cut processing of the aluminum substrate workpiece, high temperature and high pressure are generated due to the high-speed cutting between the cutting tool and the substrate, which makes the contact part extremely prone to oxidation discoloration. The anti-oxidation component contained in the water-based V-cut fluid can form a protective film on the working surface during V-cut, ensuring that the cutting part is not oxidized.

[0131] Antibacterial performance

[0132] The state of the water-based cutting fluid (V-cut fluid) of the inventive Example 1 after being used for 3 months is shown in Figure 3 , and the state of the oil-based V-cut fluid of Comparative Example 4 after being used for 3 months is shown in Figure 4 . The oil-based V-cut fluid of Comparative Example 4 has a layer of mold dirt on the surface after being used for 3 months, and it smells. Under the same use time condition, the water-based V-cut fluid of the present application only becomes white in color (due to the circulation of use, some ink particles on the aluminum substrate enter the V-cut fluid system, thus showing a milky white color), and does not produce mold dirt and smell.

[0133] During use, the cutting fluid (V-cut fluid) often has problems such as deterioration, odor, corrosion, foam generation, and skin allergy of the operator. The deterioration of the cutting fluid refers to the fact that the aerobic bacteria live in environments with minerals such as water, concentrated cutting fluid, and oil leaked from the machine tool, and under aerobic conditions, they divide into two every 20-30 minutes. Anaerobic bacteria exist in an environment without oxygen, divide into two every hour, and metabolize to release SO2, H2S, and other gases with a rotten egg smell, and the cutting fluid becomes black. When the bacteria in the cutting fluid are greater than 10 6 (cfu / mL), the cutting fluid will become smelly. The water-based cutting fluid of the present application has strong antibacterial properties and can remain odorless and unspoiled for more than half a year during use.

[0134] Lubrication performance

[0135] The traditional kerosene cutting fluid of Example 1 and Comparative Example 2 is used for producing PCB of LED decorative board, experimental conditions: taking numerical V cutting machine 10# and 11# at the same time, replacing Su Zuan diamond cutter, rotating speed 800 rpm, cutting speed 250 rpm, emptying the remaining life to 50000, 10# normal production, 11# aluminum surface upward, spraying cutting fluid production, the average service life of a new cutter using the traditional kerosene cutting fluid of Comparative Example 2 is about 24000 meters-25000 meters; the average service life of the cutter using the aqueous V cutting fluid of Example 1 is 34486.7 meters; the cutter life without using V cutting fluid is 24214.4 meters; using the aqueous cutting fluid of the application, the aqueous cutting fluid has good deburring effect, the service life of the cutter is prolonged by about 40%, which greatly reduces the cost and improves the production efficiency.

[0136] Good cleaning property reduces sticky residue

[0137] After using the oily V cutting fluid of Comparative Example 4, there are oil droplets remaining on the board surface, and aluminum scraps are adhered thereon, which is not easy to clean, and manual wiping is needed, as shown in Figure 5 After using the aqueous cutting fluid of Example 1, the surface is basically clean without aluminum scraps, which is easy to clean, as shown in Figure 6 .

[0138] The above examples are the preferred embodiments of the application, but the embodiments of the application are not limited by the above examples, and any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the application should be equivalent replacement methods, which should be included in the protection scope of the application.

Claims

1. Use of an aqueous cutting fluid in V-Cut of an aluminum substrate, characterized in that, The aqueous cutting fluid is composed of the following components by mass concentration: 15-60 g / L lubricant, 30-60 g / L surfactant, 0.5-3 g / L metal rust inhibitor, 0.5-1.5 g / L mildew inhibitor, 4-10 g / L alcohol amine substance, 5-20 g / L wetting agent, 0.1-10 g / L extreme pressure agent, 0.1-2 g / L defoaming agent, and the balance is water; The lubricant includes hydrophilic silicone oil and petroleum sulfonate; the mass ratio of hydrophilic silicone oil and petroleum sulfonate is 1:(0.1-2); The surfactant includes fatty acid methyl ester, NP-10 and solubilizer; the solubilizer includes M3102 hydroxypropyl methyl cellulose ether; The metal rust inhibitor includes benzotriazole and JF-3920 non-ferrous metal environmental protection rust inhibitor; The mildew inhibitor includes at least one of kasun, sodium diacetate; The alcohol amine substance is triethanolamine; The wetting agent includes polyether polyol; The extreme pressure agent includes at least one of sulfurized isobutylene, sulfurized lard oil, sulfurized cottonseed oil, and dibenzyl disulfide; The defoaming agent is glycerol random polyether; The aqueous cutting fluid is prepared by a method including the following steps: 1) mixing part of water with the surfactant, stirring to obtain a mixed liquid 1; mixing the lubricant and the alcohol amine substance, stirring to obtain a mixed liquid 2; mixing the mixed liquid 2 with the mixed liquid 1, and reacting to obtain a reaction liquid 1; 2) mixing the remaining water, the metal rust inhibitor, the mildew inhibitor, the wetting agent and other components, and reacting to obtain a reaction liquid 2; mixing the reaction liquid 2 with the reaction liquid 1, and reacting to obtain the aqueous cutting fluid.

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