Special oil composition for machine tool guide rail and preparation method thereof

Abstract

The invention discloses a special oil composition for a machine tool guide rail and a preparation method of the special oil composition. The special oil composition for the machine tool guide rail comprises the following components in parts by mass: 1-3 parts of an anti-wear extreme pressure agent; 1-2 parts of an adhesive; 0.01 to 0.5 part of an antirust agent; 0.01 to 0.1 part of an anti-wear agent; 0.01 to 0.05 part of a demulsifying agent; and 94.35 to 98.87 parts of base oil. The special oil composition for the machine tool guide rail has excellent extreme pressure anti-wear property, excellent stick-slip property and better metal working fluid separability, particularly has good oil film retentivity under the extreme pressure load condition, reduces the jamming phenomenon, increases the equipment processing precision, and can still effectively ensure the stable operation of a machine tool under the condition of larger load.

Description

Technical Field

[0001] The invention relates to a special oil composition for machine tool guide rails and a preparation method thereof. Background Art

[0002] The working system of machine tools is relatively complex. The working pressure is usually above 100KG, the actual oil temperature is around 50℃, the contact area of ​​the machine tool guide rails is small, and they are in extreme pressure working state for a long time. The sliding speed of the guide rails varies greatly according to the machining requirements of the machine tools, and the guide rail oil is in frequent contact with the metalworking fluid. Therefore, the oil is required to have excellent extreme pressure resistance and anti-wear performance, excellent stick-slip properties and good metalworking fluid separation.

[0003] Currently, L-HG hydraulic guide oil is widely used as machine tool guide oil, but its extreme pressure and anti-wear performance is insufficient, its stick-slip properties are poor, and it cannot be quickly separated from the metalworking fluid, causing the metalworking fluid to deteriorate, the machine tool guides to run unsteadily, the equipment failure rate is high, the machine tool processing accuracy is low, and other problems. It cannot meet the operating requirements of machine tool guides in extreme pressure environments. Summary of the invention

[0004] The present invention is made in order to improve the extreme pressure and anti-wear performance, stick-slip characteristics and metalworking fluid separation of oil products so as to meet the requirements of extreme pressure working conditions of machine tool guide rails.

[0005] As the first aspect of the present invention, it relates to a special oil composition for machine tool guide rails, which comprises the following components by mass: 1-3 parts of anti-wear extreme pressure agent; 1-2 parts of adhesive; 0.01-0.5 parts of rust inhibitor; 0.01-0.1 parts of anti-wear agent; 0.01-0.05 parts of demulsifier; and 94.35-98.87 parts of base oil.

[0006] In one or some optional embodiments, the anti-wear extreme pressure agent is tricresyl phosphate, and its structure is as follows:

[0007]

[0008] In one or some optional embodiments, the phosphorus content of the tricresyl phosphate is 8.5-15%, and the flash point is ≥120°C.

[0009] In one or some optional embodiments, the adhesive is polyisobutylene.

[0010] In one or some optional embodiments, the relative molecular mass of the polyisobutylene is about 12,000, the diameter of the wear spot is not greater than 0.6 mm, and the friction coefficient is not greater than 0.1.

[0011] In one or some optional embodiments, the anti-wear agent is tricresyl phosphate.

[0012] In one or some optional embodiments, the phosphorus content of the tricresyl phosphate is 13.5%, the wear spot diameter is 0-0.6 mm, and the Pb value is 500-1000N.

[0013] In one or some optional embodiments, the rust inhibitor is dodecenylsuccinic acid.

[0014] In one or some optional embodiments, the demulsifier is a propylene oxide diamine condensate.

[0015] In one or some optional embodiments, the demulsification value of the propylene oxide diamine condensation polymer is less than 5 min.

[0016] In one or some optional embodiments, the base oil is a Group I base oil.

[0017] In one or some preferred embodiments, the base oil has a kinematic viscosity of 27 to 33 mm at 40°C. 2 / s, open flash point not less than 180℃.

[0018] In one or some preferred embodiments, the base oil is 150SN.

[0019] As a second aspect of the present invention, it relates to a method for preparing the above-mentioned machine tool guide rail special oil composition, the method comprising:

[0020] Evenly mix the anti-wear extreme pressure agent, adhesive, rust inhibitor, anti-wear agent, demulsifier and base oil.

[0021] The special oil composition for machine tool guide rails provided by the present invention is compounded with an anti-wear extreme pressure agent, an anti-wear agent and an adhesive, so that the special oil composition for machine tool guide rails has excellent extreme pressure and anti-wear performance, excellent stick-slip characteristics and good metalworking fluid separation, especially has good oil film retention under extreme pressure load conditions, reduces the jamming phenomenon, increases the equipment processing accuracy, and can effectively ensure the smooth operation of the machine tool under heavy load conditions.

[0022] The special oil composition for machine tool guide rails provided by the present invention adopts tricresyl phosphate as an anti-wear extreme pressure agent, which can undergo high-temperature decomposition reaction at the protruding points on the metal friction surface, generate iron phosphide with iron, and the iron phosphide reacts with iron to generate a low-melting-point eutectic alloy that flows into the grooves of the friction surface, fills the grooves on the metal surface, makes the metal surface smooth, and prevents wear. In addition, the present invention adopts an anti-wear extreme pressure agent with a phosphorus content of ≥8.5% and a flash point of ≥120°C, and the percentage of the anti-wear extreme pressure agent in the composition is 1-3%. The dosage can ensure that the wear spot diameter of the oil product is ≤0.5mm, and the FZG failure level reaches level 12.

[0023] The present invention adopts hydrocarbon polymer as adhesive, which increases the fluid mechanics volume, liquid internal friction and oil film thickness through molecular stretching, thereby enhancing the stick-slip property of the oil.

[0024] The present invention adopts tricresyl phosphate as an anti-wear agent, which has good anti-wear performance and low corrosiveness. When the metal surface is under load, the anti-wear agent reacts with the metal surface to generate a metal protective film with low shear strength, thereby preventing metal wear.

[0025] The present invention adopts sulfonate compounds as rust inhibitors, which have excellent rust prevention performance. During the use of oil products, they can wet the metal surface and form a metal protective film. Even in the presence of moisture, a firm oil film can still be formed on the metal surface to protect the metal from rust and corrosion.

[0026] The present invention adopts propylene oxide diamine polycondensate as demulsifier, and the molecular interfacial activity of the demulsifier is higher than that of the film-forming substance in the oil, and the demulsifier can be adsorbed between the oil-water interface, destroy the interfacial film, release the water wrapped in the oil film, and the water droplets attract each other to form large water droplets that settle to the bottom of the oil layer, thereby destroying the stability of the emulsion.

[0027] The present invention adopts Class I base oil 150SN as the base oil, and the base oil can provide better anti-wear performance. DETAILED DESCRIPTION

[0028] The following is a detailed description of the embodiments of the present invention: The embodiments of the present invention are implemented on the premise of the technical solution of the present invention, and detailed implementation methods and processes are given, but the protection scope of the present invention is not limited to the following embodiments. The process parameters for which specific conditions are not specified in the following embodiments are generally based on conventional conditions.

[0029] The endpoints and any values ​​of the ranges disclosed in the present invention are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be regarded as specifically disclosed in the present invention.

[0030] Example 1

[0031] The 150SN base oil, tricresyl phosphate anti-wear extreme pressure agent T309, polyisobutylene adhesive H151, dodecenylsuccinic acid rust inhibitor T746 (total acid value is 267 mgKOH / g, pH value is 4.9), 2,6-di-tert-butyl-p-cresol antioxidant T501 and propylene oxide diamine condensate demulsifier DL32 were mixed, stirred at a temperature of 60±5°C for 1 to 2 hours, and a special oil composition for machine tool guide rails was obtained by blending.

[0032] The addition amount of each component in this embodiment is shown in Table 1.

[0033] Table 1 Components and contents of the special oil composition for machine tool guide rails in Example 1

[0034]

[0035]

[0036] The performance of the special oil composition for machine tool guide rails prepared in this embodiment was tested, and the test results are shown in Table 2.

[0037] Table 2 Performance data of the special oil composition for machine tool guide rails in Example 1

[0038] project OEM quality indicators Example 1 Experimental methods <![CDATA[Kinematic viscosity at 40 °C / (mm 2 / s)]]> 28.8.0～35.2 31.43 GB / T 265 Viscosity Index Not less than 90 97 GB / T 1995 Liquid phase corrosion (A method) Rust-free Rust-free GB / T 11143 Copper corrosion (60℃, 3h) level No more than 1 1a GB / T 5096 Wear spot diameter (200N, 60min, 1500r / min), mm No more than 0.5 0.38 SH / T 0189 Stick-slip properties No more than 0.8 0.77 ASTM D2877 Processing fluid separation pass pass SKC Schmidt Gear machine test / failure level Not less than 10 12 SH / T 0306

[0039] As can be seen from Table 2, the wear spot diameter of the special oil composition for machine tool guide rails prepared in Example 1 is only 0.38 mm, and the stick-slip characteristics and metalworking fluid separation performance are excellent, indicating that the special oil composition for machine tool guide rails has excellent extreme pressure wear resistance, stick-slip characteristics and metalworking fluid separation, and can effectively ensure the smooth operation of machine tool guide rail equipment under extreme pressure environment.

[0040] Example 2

[0041] 150SN base oil, tricresyl phosphate anti-wear extreme pressure agent T309, polyisobutylene adhesive H151, dodecenylsuccinic acid rust inhibitor T746, 2,6-di-tert-butyl-p-cresol antioxidant T306 and propylene oxide diamine condensate demulsifier DL32 were mixed, stirred at 60±5°C for 1 to 2 hours, and a special oil composition for machine tool guide rails was obtained by blending. The addition amount of each component is shown in Table 3.

[0042] Table 3 Components and contents of the special oil composition for machine tool guide rails in Example 2

[0043] name factory Mass parts / parts Base oil 150SN Dalian Petrochemical 93.6 Anti-wear extreme pressure agent T309 Jinzhou Shengda University 1.5 Adhesive H151 Afton 1 Rust inhibitor T746 King Group 0.3 Antiwear agent T306 Tianjin Lihai 0.06 Demulsifier DL32 Danyang Chemical 0.03

[0044] The performance of the special oil composition for machine tool guide rails prepared in this embodiment was tested, and the test results are shown in Table 4.

[0045] Table 4 Performance data of the special oil composition for machine tool guide rails in Example 2

[0046] project OEM quality indicators Example 1 Experimental methods <![CDATA[40℃ kinematic viscosity / (mm 2 / s)]]> 28.8.0～35.2 31.26 GB / T 265 Viscosity Index Not less than 90 95 GB / T 1995 Liquid phase corrosion (A method) Rust-free Rust-free GB / T 11143 Copper corrosion (60℃, 3h) level No more than 1 1a GB / T 5096 Wear spot diameter (200N, 60min, 1500r / min), mm No more than 0.5 0.41 SH / T 0189 Stick-slip properties No more than 0.8 0.78 ASTM D2877 Processing fluid separation pass pass SKC Schmidt Gear machine test / failure level Not less than 10 12 SH / T 0306

[0047] It can be seen from Table 4 that the wear spot diameter of the special oil composition for machine tool guide rails prepared in Example 2 is only 0.41 mm, which has excellent anti-wear performance and can effectively protect machine tool equipment.

[0048] Example 3

[0049] 150SN base oil, tricresyl phosphate anti-wear extreme pressure agent T309, polyisobutylene adhesive H151, dodecenyl succinic acid rust inhibitor T746, 2,6-di-tert-butyl-p-cresol antioxidant T306 and propylene oxide diamine condensate demulsifier DL32 were mixed, stirred at 60±5°C for 1 to 2 hours, and a special oil composition for machine tool guide rails was obtained by blending. The addition amount of each component is shown in Table 5.

[0050] Table 5 Components and contents of the special oil composition for machine tool guide rails in Example 3

[0051] name factory Mass parts / parts Base oil 150SN Dalian Petrochemical 98.77 Anti-wear extreme pressure agent T309 Jinzhou Shengda University 1 Adhesive H151 Afton 1.5 Rust inhibitor T746 King Group 0.01 Antiwear agent T306 Tianjin Lihai 0.01 Demulsifier DL32 Danyang Chemical 0.01

[0052] The performance of the special oil composition for machine tool guide rails prepared in this embodiment was tested, and the test results are shown in Table 6.

[0053] Table 6 Performance data of the special oil composition for machine tool guide rails in Example 3

[0054]

[0055] As shown in Table 6, the wear spot diameter of the special oil composition for machine tool guide rails prepared in Example 3 is only 0.47 mm, and the stick-slip property and metalworking fluid separation performance are excellent. It can be effectively separated from the cutting fluid to maintain the stability of the oil product.

[0056] By analyzing the performance data of the special oil composition for machine tool guide rails in Examples 1-3, it can be seen that the special oil composition for machine tool guide rails of the present invention has excellent extreme pressure anti-wear properties, stick-slip properties and metalworking fluid separation properties, especially has excellent oil film retention under high load conditions, and the oil product can pass all requirements of the standard quality indicators of the guide rail oil industry.

[0057] Although the specific embodiments of the present invention have been described in detail, it will be understood by those skilled in the art. According to all the teachings disclosed, various modifications and replacements can be made to those details, and these changes are all within the protection scope of the present invention. The full scope of the present invention is given by the attached claims and any equivalents thereof.

Claims

1. A special oil composition for machine tool guide rails, characterized in that: The composition comprises the following components by mass: 1-3 parts of anti-wear extreme pressure agent; 1-2 parts of adhesive; Antiwear agent 0.01-0.1 part; Rust inhibitor 0.01-0.5 parts; Demulsifier 0.01-0.05 parts; Base oil 94.35-98.87 parts.

2. The composition according to claim 1, characterized in that The anti-wear extreme pressure agent is tricresyl phosphate.

3. The composition according to claim 2, characterized in that The phosphorus content of the tricresyl phosphate is 8.5-15%, and the flash point is ≥120°C.

4. The composition according to claim 1, characterized in that The adhesive is polyisobutylene.

5. The composition according to claim 4, characterized in that The relative molecular mass of the polyisobutylene is about 12,000, the wear spot diameter is no more than 0.6 mm, and the friction coefficient is no more than 0.

1.

6. The composition according to claim 1, characterized in that The anti-wear agent is tricresyl phosphate.

7. The composition according to claim 6, characterized in that The phosphorus content of the tricresyl phosphate is 13.5%, the wear spot diameter is 0-0.6 mm, and the Pb value is 500-1000N.

8. The composition according to claim 1, characterized in that The rust inhibitor is dodecenylsuccinic acid.

9. The composition according to claim 1, characterized in that The demulsifier is a propylene oxide diamine polycondensate.

10. The composition according to claim 9, characterized in that The demulsification value of the propylene oxide diamine polycondensate is less than 5 min.

11. The composition according to claim 1, characterized in that The base oil is a Group I base oil.

12. The composition according to claim 11, characterized in that The base oil has a kinematic viscosity of 27 to 33 mm at 40°C. 2 / s, open flash point not less than 180℃.

13. The composition according to claim 12, characterized in that The base oil is 150SN.

14. A method for preparing the special oil composition for machine tool guide rails according to any one of claims 1 to 13, the method comprising: Evenly mix the anti-wear extreme pressure agent, adhesive, rust inhibitor, anti-wear agent, demulsifier and base oil.

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