A method for preparing precision guide rail oil

Abstract

The present invention discloses a method for preparing a precision guide rail oil, the preparation method comprising the following steps: (1) mixing poly alpha-olefin, secondary hydrogenated base oil and sulfurized fatty acid ester to prepare an anti-climbing and water-separation continuous oil film composite system; (2) mixing secondary hydrogenated base oil, long-chain alkylamine, alkyl phosphite, bicyclic alkylated aromatic hydrocarbon and thiophosphate to prepare an anti-scratch and corrosion-resistant composite system; (3) mixing the anti-climbing and water-separation continuous oil film composite system and the anti-scratch and corrosion-resistant composite system to prepare precision guide rail oil. The present invention mixes secondary hydrogenated oil, poly alpha-olefin, long-chain alkylamine and other components according to a specific ratio and method based on material activity and reaction mechanism, so that each component acts synergistically, forms a continuous and complete oil film on the friction pair bearing surface of the guide rail system, reduces the stick-slip motion and shaking creep of the guide rail, inhibits corrosion, prolongs the service life of the guide rail, and improves the product qualification rate.

Description

Technical Field

[0001] The invention relates to the technical field of assembly manufacturing industry, and in particular to a method for preparing precision guide rail oil. Background Art

[0002] Guide rails are devices that play a guiding and supporting role in mechanical processing. They usually make reciprocating motions under high load conditions. During use, the two metal surfaces in contact with each other often produce cutting scratches and metal fatigue strains to varying degrees, causing damage to the guide rails, thereby affecting the accuracy of the equipment and processed products.

[0003] In high-precision machining, the selection of guide oil is very important. Take the vertical guide of CNC machine tools as an example. Due to its structural reasons, if ordinary guide oil is used for lubrication, the guide oil may not provide sufficient extreme pressure and lubrication protection, causing the guide to wear prematurely under heavy loads or high-speed movement, shortening the service life of the guide, and increasing the frequency and cost of overhauls. Or, due to the inability to form a stable lubrication film on the screw and other transmission components, direct contact between metals occurs, increasing the risk of wear and damage, or causing large consumption of guide oil, splashing of cutting fluid and washing of the guide oil, etc. The resulting high operating costs, low production efficiency, and poor working environment have always plagued companies using CNC machine tools. At a time when the requirements for component machining accuracy are getting higher and higher, how to prepare effective precision guide oil has become an urgent problem to be solved. Summary of the invention

[0004] The present invention first provides a method for preparing precision guide rail oil. The preparation method comprises preparing the materials in a sequential order according to the material activity and reaction mechanism. The process is safe and easy. The components complement each other and synergize to improve the lubricity of the guide rail oil, reduce the stick-slip motion and jitter creep of the guide rail, inhibit corrosion, extend the service life of the guide rail, and improve the product qualification rate.

[0005] The present invention solves the technical problem by adopting the following technical solution:

[0006] The present invention provides a method for preparing precision guide rail oil, and the method for preparing precision guide rail oil comprises the following steps:

[0007] (1) preparing an anti-slip and water-separation continuous oil film composite system by mixing poly-α-olefin, secondary hydrogenated base oil and sulfurized fatty acid ester;

[0008] (2) preparing an anti-scratch and corrosion-resistant composite system by mixing a secondary hydrogenated base oil, a long-chain alkylamine, an alkyl phosphite, a bicyclic alkylated aromatic hydrocarbon and a thiophosphate;

[0009] (3) The anti-climbing and water-separating continuous oil film composite system and the anti-scratch and corrosion-resistant composite system are mixed to prepare precision guide rail oil.

[0010] The kinematic viscosity of the secondary hydrogenated base oil at 40°C is 83-87 mm 2 / s; the long-chain alkylamine is selected from one or more of dodecylamine, hexadecylamine, and N,N-dimethyldodecylamine; the alkyl phosphite is selected from one or more of trimethyl phosphite, di(octadecyl) phosphite, and tri(tridecyl) phosphite; the bicyclic alkylated aromatic hydrocarbon is selected from one or more of methylnaphthalene, dimethylnaphthalene, and isopropylnaphthalene.

[0011] Preferably, the preparation method of the anti-climbing and water-separation continuous oil film composite system is:

[0012] Put poly-α-olefin, secondary hydrogenated base oil and sulfurized fatty acid ester into a heatable reaction container according to the mass ratio, stir at variable speed at 25°C, increase the temperature by 1°C every 2 minutes, continue stirring and heating to 43-47°C, react for 27-33 minutes, keep the temperature unchanged, and slowly stir at a speed of 10-20 rpm until it becomes a light yellow uniform transparent liquid, stop heating, and let it stand for 10-20 minutes to obtain an anti-climbing and water-separation continuous oil film composite system without suspended bubbles and overall uniformity.

[0013] Preferably, the mass ratio of the poly-α-olefin, the secondary hydrogenated base oil and the sulfurized fatty acid ester is (290-310):(1210-1270):(85-115).

[0014] Preferably, the variable speed stirring is first stirring at a speed of 350 to 450 rpm for 4 to 6 min, then stirring at a speed of 280 to 320 rpm for 8 to 12 min, and finally adjusting the speed to 180 to 240 rpm.

[0015] Preferably, the preparation method of the anti-scratch and corrosion-resistant composite system is:

[0016] Add secondary hydrogenated base oil in a heatable container according to a mass ratio, and heat to 43-47°C with a temperature increase of 1°C every 2 minutes and a rotation speed of 120-180 rpm under continuous stirring. Adjust the rotation speed to 70-90 rpm, and add long-chain alkylamine, alkyl phosphite, bicyclic alkylated aromatic hydrocarbon and thiophosphate in sequence according to a mass ratio while stirring. Stir for 28-32 minutes until a brown-yellow uniform transparent liquid is presented, and stand for 10-20 minutes to obtain an anti-scratch and corrosion-resistant composite system.

[0017] Preferably, the mass ratio of the secondary hydrogenated base oil, long-chain alkylamine, alkyl phosphite, bicyclic alkylated aromatic hydrocarbon and thiophosphate is (180-220): (15-25): (5-15): (12-16): (26-34).

[0018] Preferably, the preparation method of the precision guide rail oil is:

[0019] Add the anti-climbing and water-separation continuous oil film composite system and the anti-scratch and corrosion-resistant composite system into a heatable container according to the mass ratio, adjust the rotation speed to 60-80 rpm, and heat to 43-47°C with a temperature increase of 1°C every 2 minutes while stirring continuously. Stir for 28-32 minutes until a light yellow uniform transparent liquid appears. Keep warm at 30-40°C for 20-30 minutes, and let stand to room temperature to obtain precision guide rail oil.

[0020] Preferably, the mass ratio of the anti-creeping and water-separation continuous oil film composite system to the anti-scratch and corrosion-resistant composite system is (750-850): (180-220).

[0021] Beneficial effects of the present invention:

[0022] The method for preparing a precision guide rail oil of the present invention mixes the components in a specific proportion and method according to the activity of the materials and the reaction mechanism, and the process is safe and easy to operate.

[0023] Among them, the anti-climbing and water-separation continuous oil film composite system prepared from poly-α-olefin, secondary hydrogenated base oil and sulfurized fatty acid ester can enhance the adsorption viscosity of oil products and maintain the filter passability of oil products; while the alkyl phosphite in the anti-scratch and corrosion-resistant composite system can inhibit the aging of oil products and reduce the formation of base oil colloids and asphaltene. The network structure of dicyclic alkylated aromatics is conducive to the penetration and spreading of other components in the oil products and the mutual addition with poly-α-olefin. When the two systems are mixed, the sulfurized fatty acid ester and the thiophosphate ester work together to realize the sulfur-phosphorus interactive system. Under the joint action of good adhesion and permeability, the components are fully mixed and reacted to obtain precision guide rail oil, thereby improving the various properties of the guide rail oil.

[0024] The components of the preparation method fully react and cooperate with each other, and the prepared precision guide oil has excellent lubricity and can form a continuous and complete oil film on the friction pair bearing surface of the guide system, thereby reducing the creep of the guide while meeting the lubrication requirements, blocking the guide surface and reducing corrosion caused by the direct action of cutting fluids, thereby effectively extending the service life of the guide and improving the product qualification rate. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention are described clearly and completely below in conjunction with specific embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Example 1.

[0027] A method for preparing precision guide rail oil. The method for preparing precision guide rail oil of this embodiment comprises the following steps:

[0028] (1) preparing an anti-slip and water-separation continuous oil film composite system by mixing poly-α-olefin, secondary hydrogenated base oil and sulfurized fatty acid ester;

[0029] (2) preparing an anti-scratch and corrosion-resistant composite system by mixing a secondary hydrogenated base oil, a long-chain alkylamine, an alkyl phosphite, a bicyclic alkylated aromatic hydrocarbon and a thiophosphate;

[0030] (3) The anti-climbing and water-separating continuous oil film composite system and the anti-scratch and corrosion-resistant composite system are mixed to prepare precision guide rail oil.

[0031] The kinematic viscosity of the secondary hydrogenated base oil in this embodiment at 40°C is 83.5 mm 2 / s; the long-chain alkylamine of this embodiment is N,N-dimethyldodecylamine; the alkyl phosphite of this embodiment is trimethyl phosphite; the bicyclic alkylated aromatic hydrocarbon of this embodiment is dimethylnaphthalene.

[0032] The kinematic viscosity of the poly-α-olefin in this example at 40° C. is 220 mm 2 / s.

[0033] The preparation method of the anti-climbing and water-separation continuous oil film composite system of this embodiment is:

[0034] Poly-α-olefin, secondary hydrogenated base oil and sulfurized fatty acid ester are put into a heatable reaction container according to the mass ratio. After variable speed stirring at 25°C, the temperature is increased by 1°C every 2 minutes. When the temperature reaches 43°C, the reaction is continued for 27 minutes. The temperature is kept constant and the speed is slowly stirred at a speed reduced by 10 rpm. When the mixture becomes a light yellow uniform transparent liquid, the heating is stopped and the mixture is allowed to stand for 10 minutes to obtain an anti-climbing and water-separation continuous oil film composite system without suspended bubbles and with overall uniformity.

[0035] The mass ratio of the poly-α-olefin, the secondary hydrogenated base oil and the sulfurized fatty acid ester in this embodiment is 290:1210:85.

[0036] The variable speed stirring in this embodiment is to first stir at a speed of 350 rpm for 4 min, then stir at a speed of 280 rpm for 8 min, and finally adjust the speed to 180 rpm.

[0037] The preparation method of the anti-scratch and corrosion-resistant composite system of this embodiment is:

[0038] Add secondary hydrogenated base oil in a heatable container according to the mass ratio, increase the temperature by 1°C every 2 minutes, and heat to 43°C with continuous stirring at a speed of 120 rpm. Adjust the speed to 70 rpm, and add N,N-dimethyldodecylamine, trimethyl phosphite, dimethylnaphthalene and thiophosphate in sequence according to the mass ratio while stirring. Stir for 28 minutes until a brown-yellow uniform transparent liquid is presented, and let it stand for 10 minutes to obtain an anti-scratch and corrosion-resistant composite system.

[0039] The mass ratio of the secondary hydrogenated base oil, N,N-dimethyldodecylamine, trimethyl phosphite, dimethylnaphthalene and thiophosphate in this embodiment is 180:15:5:12:26.

[0040] The preparation method of the precision guide rail oil of this embodiment is:

[0041] Add the anti-climbing and water-separation continuous oil film composite system and the anti-scratch and corrosion-resistant composite system into a heatable container according to the mass ratio, adjust the speed to 60 rpm, and heat to 43 °C with a temperature increase of 1 °C every 2 minutes while stirring continuously. Stir for 28 minutes until a light yellow uniform transparent liquid appears. Keep warm at 30 °C for 20 minutes, let stand to room temperature, and obtain precision guide rail oil.

[0042] The mass ratio of the anti-creeping and water-separation continuous oil film composite system to the anti-scratch and corrosion-resistant composite system in this embodiment is 750:180.

[0043] Example 2.

[0044] A method for preparing precision guide rail oil. The method for preparing precision guide rail oil of this embodiment comprises the following steps:

[0045] (1) preparing an anti-slip and water-separation continuous oil film composite system by mixing poly-α-olefin, secondary hydrogenated base oil and sulfurized fatty acid ester;

[0046] (2) preparing an anti-scratch and corrosion-resistant composite system by mixing a secondary hydrogenated base oil, a long-chain alkylamine, an alkyl phosphite, a bicyclic alkylated aromatic hydrocarbon and a thiophosphate;

[0047] (3) The anti-climbing and water-separating continuous oil film composite system and the anti-scratch and corrosion-resistant composite system are mixed to prepare precision guide rail oil.

[0048] The kinematic viscosity of the secondary hydrogenated base oil in this embodiment at 40°C is 83.5 mm 2 / s; the long-chain alkylamine of this embodiment is N,N-dimethyldodecylamine; the alkyl phosphite of this embodiment is trimethyl phosphite; the bicyclic alkylated aromatic hydrocarbon of this embodiment is dimethylnaphthalene.

[0049] The kinematic viscosity of the poly-α-olefin in this example at 40° C. is 220 mm 2 / s.

[0050] The preparation method of the anti-climbing and water-separation continuous oil film composite system of this embodiment is:

[0051] Poly-α-olefin, secondary hydrogenated base oil and sulfurized fatty acid ester are put into a heatable reaction container according to the mass ratio. After variable speed stirring at 25°C, the temperature is increased by 1°C every 2 minutes. When the temperature reaches 47°C, the reaction is continued for 33 minutes. The temperature is kept constant and the speed is reduced by 20 rpm while stirring slowly. When the mixture becomes a light yellow uniform transparent liquid, the heating is stopped and the mixture is allowed to stand for 20 minutes to obtain an anti-climbing and water-separation continuous oil film composite system without suspended bubbles and with overall uniformity.

[0052] The mass ratio of the poly-α-olefin, the secondary hydrogenated base oil and the sulfurized fatty acid ester in this embodiment is 310:1270:115.

[0053] The variable speed stirring in this embodiment is to first stir at a speed of 450 rpm for 6 min, then stir at a speed of 320 rpm for 12 min, and finally adjust the speed to 240 rpm.

[0054] The preparation method of the anti-scratch and corrosion-resistant composite system of this embodiment is:

[0055] Add secondary hydrogenated base oil in a heatable container according to the mass ratio, increase the temperature by 1°C every 2 minutes, and heat to 47°C with continuous stirring at a speed of 180 rpm. Adjust the speed to 90 rpm, and add N,N-dimethyldodecylamine, trimethyl phosphite, dimethylnaphthalene and thiophosphate in sequence according to the mass ratio while stirring. Stir for 32 minutes until a brown-yellow uniform transparent liquid is presented, and let stand for 20 minutes to obtain an anti-scratch and corrosion-resistant composite system.

[0056] The mass ratio of the secondary hydrogenated base oil, N,N-dimethyldodecylamine, trimethyl phosphite, dimethylnaphthalene and thiophosphate in this embodiment is 220:25:15:16:34.

[0057] The preparation method of the precision guide rail oil of this embodiment is:

[0058] Add the anti-climbing and water-separation continuous oil film composite system and the anti-scratch and corrosion-resistant composite system into a heatable container according to the mass ratio, adjust the speed to 80 rpm, and heat to 47 °C with a temperature increase of 1 °C every 2 minutes while stirring continuously. Stir for 32 minutes until a light yellow uniform transparent liquid appears. Keep warm at 40 °C for 30 minutes, let stand to room temperature, and obtain precision guide rail oil.

[0059] The mass ratio of the anti-creeping and water-separating continuous oil film composite system to the anti-scratch and corrosion-resistant composite system in this embodiment is 850:220.

[0060] Example 3.

[0061] A method for preparing precision guide rail oil. The method for preparing precision guide rail oil of this embodiment comprises the following steps:

[0062] (1) preparing an anti-slip and water-separation continuous oil film composite system by mixing poly-α-olefin, secondary hydrogenated base oil and sulfurized fatty acid ester;

[0063] (2) preparing an anti-scratch and corrosion-resistant composite system by mixing a secondary hydrogenated base oil, a long-chain alkylamine, an alkyl phosphite, a bicyclic alkylated aromatic hydrocarbon and a thiophosphate;

[0064] (3) The anti-climbing and water-separating continuous oil film composite system and the anti-scratch and corrosion-resistant composite system are mixed to prepare precision guide rail oil.

[0065] The kinematic viscosity of the secondary hydrogenated base oil in this embodiment at 40°C is 83.5 mm 2 / s; the long-chain alkylamine of this embodiment is N,N-dimethyldodecylamine; the alkyl phosphite of this embodiment is trimethyl phosphite; the bicyclic alkylated aromatic hydrocarbon of this embodiment is dimethylnaphthalene.

[0066] The kinematic viscosity of the poly-α-olefin in this example at 40° C. is 220 mm 2 / s.

[0067] The preparation method of the anti-climbing and water-separation continuous oil film composite system of this embodiment is:

[0068] Poly-α-olefin, secondary hydrogenated base oil and sulfurized fatty acid ester are put into a heatable reaction container according to the mass ratio. After variable speed stirring at 25°C, the temperature is increased by 1°C every 2 minutes. When the temperature reaches 45°C, the reaction is continued for 30 minutes. The temperature is kept constant and the speed is slowly stirred at a speed reduced by 15 rpm. When the mixture becomes a light yellow uniform transparent liquid, the heating is stopped and the mixture is allowed to stand for 15 minutes to obtain an anti-climbing and water-separation continuous oil film composite system without suspended bubbles and with overall uniformity.

[0069] The mass ratio of the poly-α-olefin, the secondary hydrogenated base oil and the sulfurized fatty acid ester in this embodiment is 300:1240:100.

[0070] The variable speed stirring in this embodiment is to first stir at a speed of 400 rpm for 5 minutes, then stir at a speed of 300 rpm for 10 minutes, and finally adjust the speed to 210 rpm.

[0071] The preparation method of the anti-scratch and corrosion-resistant composite system of this embodiment is:

[0072] Add secondary hydrogenated base oil in a heatable container according to the mass ratio, increase the temperature by 1°C every 2 minutes, and heat to 45°C with continuous stirring at a speed of 150 rpm. Adjust the speed to 80 rpm, and add N,N-dimethyldodecylamine, trimethyl phosphite, dimethylnaphthalene and thiophosphate in sequence according to the mass ratio while stirring. Stir for 30 minutes until a brown-yellow uniform transparent liquid is presented, and let it stand for 15 minutes to obtain an anti-scratch and corrosion-resistant composite system.

[0073] The mass ratio of the secondary hydrogenated base oil, N,N-dimethyldodecylamine, trimethyl phosphite, dimethylnaphthalene and thiophosphate in this embodiment is 200:20:10:14:30.

[0074] The preparation method of the precision guide rail oil of this embodiment is:

[0075] Add the anti-climbing and water-separation continuous oil film composite system and the anti-scratch and corrosion-resistant composite system into a heatable container according to the mass ratio, adjust the speed to 70 rpm, and heat to 45 °C with a temperature increase of 1 °C every 2 minutes while stirring continuously. Stir for 30 minutes until a light yellow uniform transparent liquid appears. Keep warm at 35 °C for 25 minutes, let stand to room temperature, and obtain precision guide rail oil.

[0076] The mass ratio of the anti-creeping and water-separating continuous oil film composite system to the anti-scratch and corrosion-resistant composite system in this embodiment is 800:200.

[0077] Comparative Example 1.

[0078] The difference from Example 3 is that no poly-α-olefin is added.

[0079] Comparative Example 2.

[0080] The difference from Example 3 is that ordinary base oil is used instead of secondary hydrogenated base oil.

[0081] Comparative Example 3.

[0082] The difference from Example 3 is that the preparation method of the anti-climbing and water-separation continuous oil film composite system is different, which is:

[0083] Poly-α-olefin, secondary hydrogenated base oil and sulfurized fatty acid ester are added into a reaction container in a mass ratio of 310:1270:115, and stirred at room temperature until a light yellow uniform transparent liquid is present to obtain an anti-climbing and water separation continuous oil film composite system.

[0084] Comparative Example 4.

[0085] The difference from Example 3 is that the preparation method of the anti-scratch and corrosion-resistant composite system is different, which is:

[0086] Add secondary hydrogenated base oil, N,N-dimethyldodecylamine, trimethyl phosphite, dimethylnaphthalene and thiophosphate into a container in a mass ratio of 200:20:10:14:30 in sequence, and stir at room temperature until a brown-yellow uniform transparent liquid is present to obtain an anti-scratch and corrosion-resistant composite system.

[0087] Comparative Example 5.

[0088] The difference from Example 3 is that the preparation method of the guide rail oil is different, which is:

[0089] The guide rail oil is obtained by directly mixing and stirring poly-alpha-olefin, secondary hydrogenated base oil, sulfurized fatty acid ester, N,N-dimethyldodecylamine, trimethyl phosphite, dimethylnaphthalene and thiophosphate.

[0090] In order to verify the performance of the guide rail oil prepared in Examples 1-3 and Comparative Examples 1-5, a four-ball friction test was conducted. The steel balls used met the national standard for experimental balls. The experimental conditions were room temperature, a rotation speed of 1500 rpm, a test load of 20 kgf, and an experimental time of 60 minutes each time. After the experiment, the wear spot diameter of the bottom ball was measured using an electron microscope. The maximum non-seizure load PB value, sintering load PD value, and anti-climbing coefficient of the guide rail oil were determined according to the test standard of the national standard GB / T 3142. The average value of multiple parallel experiments was taken as the final test result. The specific experimental results are shown in Table 1.

[0091] Table 1

[0092]

[0093] It can be seen from Table 1 that the specific process adopted in Examples 1-3 of the present invention can improve the comprehensive performance of the guide rail oil. The prepared guide rail oil has a higher PB value and PD value, a smaller wear spot diameter and an anti-climbing coefficient, and can effectively improve the lubrication state and reduce wear, thereby extending the service life of the guide rail and improving the qualified rate of the product.

[0094] By comparing Example 3 with Comparative Examples 1-5, it can be seen that reducing or changing any component in the present invention, or simply matching and mixing various components, cannot achieve organic coordination between the components, and cannot prepare an ideal precision guide oil. However, according to the present invention, the components are mixed in a specific proportion and method according to the material activity and reaction mechanism, and a secondary hydrogenated base oil is used as a basis. The synergistic effect between sulfided fatty acid esters and thiophosphates is utilized to realize a sulfur-phosphorus interactive system, the adsorption viscosity of poly-α-olefins to oil products, and the network structure of dicycloalkylated aromatics, so as to achieve adsorption of oil products and penetration and spreading of other components in the oil products to form a continuous and complete oil film, and alkyl phosphites are used to inhibit the aging of oil products. The components synergize to prepare a precision guide oil with good lubrication performance, extended guide service life, and improved product qualification rate.

[0095] Inspired by the above-mentioned ideal embodiments of the present invention, it should be pointed out that the technical scope of the present invention is not limited to the contents of the specification. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A method for preparing precision guide rail oil, characterized in that: The preparation method of the precision guide rail oil comprises the following steps: (1) preparing an anti-slip and water-separation continuous oil film composite system by mixing poly-α-olefin, secondary hydrogenated base oil and sulfurized fatty acid ester; (2) preparing an anti-scratch and corrosion-resistant composite system by mixing a secondary hydrogenated base oil, a long-chain alkylamine, an alkyl phosphite, a bicyclic alkylated aromatic hydrocarbon and a thiophosphate; (3) Precision guide rail oil is prepared by mixing the anti-climbing and water-separation continuous oil film composite system and the anti-scratch and corrosion-resistant composite system; The kinematic viscosity of the secondary hydrogenated base oil at 40° C. is 83 to 87 mm2 / s; the long-chain alkylamine is selected from one or more of dodecylamine, hexadecylamine, and N,N-dimethyldodecylamine; the alkyl phosphite is selected from one or more of trimethyl phosphite, di(octadecyl) phosphite, and tri(tridecyl) phosphite; the bicyclic alkylated aromatic hydrocarbon is selected from one or more of methylnaphthalene, dimethylnaphthalene, and isopropylnaphthalene; The preparation method of the anti-climbing and water separation continuous oil film composite system is as follows: poly-alpha-olefin, secondary hydrogenation base oil and sulfurized fatty acid ester are added into a heatable reaction container according to the mass ratio, and after variable speed stirring at 25° C., the temperature is raised by 1° C. every 2 minutes, and the temperature is continuously stirred and heated to 43-47° C., and the reaction is carried out for 27-33 minutes. The temperature is kept constant, and the speed is reduced by 10-20 rpm, and the stirring is slowly carried out until a light yellow uniform transparent liquid is presented, and the heating is stopped, and the mixture is allowed to stand for 10-20 minutes to obtain an anti-climbing and water separation continuous oil film composite system without suspended bubbles and uniform as a whole; the mass ratio of the poly-alpha-olefin, secondary hydrogenation base oil and sulfurized fatty acid ester is (290-310): (1210-1270): (85-115); The preparation method of the anti-scratch and corrosion-resistant composite system is as follows: add secondary hydrogenated base oil into a heatable container according to a mass ratio, heat the container by 1°C every 2 minutes, and heat the container to 43°C to 47°C under the conditions of a rotation speed of 120 to 180 rpm, continuously stir and heat the container to 70 to 90 rpm, add long-chain alkylamine, alkyl phosphite, bicyclic alkylated aromatic hydrocarbons and thiophosphate in sequence according to a mass ratio while stirring, stir for 28 to 32 minutes, and allow the container to stand for 10 to 20 minutes until a brown-yellow uniform transparent liquid is presented, thereby obtaining the anti-scratch and corrosion-resistant composite system; the mass ratio of the secondary hydrogenated base oil, long-chain alkylamine, alkyl phosphite, bicyclic alkylated aromatic hydrocarbons and thiophosphate is (180 to 220): (15 to 25): (5 to 15): (12 to 16): (26 to 34); The preparation method of the precision guide rail oil is as follows: add an anti-creeping and water-separation continuous oil film composite system and an anti-scratch and corrosion-resistant composite system in a heatable container according to a mass ratio, adjust the rotation speed to 60-80rmp, and heat to 43-47°C with a temperature increase of 1°C every 2 minutes, stirring for 28-32 minutes until it becomes a light yellow uniform transparent liquid, and keep warm at 30-40°C for 20-30 minutes, let it stand to room temperature, and obtain the precision guide rail oil; the mass ratio of the anti-creeping and water-separation continuous oil film composite system and the anti-scratch and corrosion-resistant composite system is (750-850):(180-220).

2. The method for preparing a precision guide rail oil according to claim 1, characterized in that: The variable speed stirring is first stirring at a speed of 350 to 450 rpm for 4 to 6 min, then stirring at a speed of 280 to 320 rpm for 8 to 12 min, and finally adjusting the speed to 180 to 240 rpm.

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