Surface treatment process capable of improving lubricity of self-lubricating bearing

Abstract

The invention discloses a surface treatment process capable of improving the lubricity of a self-lubricating bearing. The surface treatment process comprises the following steps that firstly, surface pretreatment is conducted, specifically, the self-lubricating bearing is pretreated before being machined; step 2, determining coating film components: determining the coating film components according to the processing requirements of the self-lubricating bearing; according to the surface treatment technology, a traditional coating technology is replaced, the preparation technology is simple, the cost is low, carbon and nitrogen are deposited on the surfaces of the steel balls in a vacuum chamber by controlling the energy and time of ion bombardment, a uniform amorphous carbonized film is formed, the traditional waiting time is omitted, and the surface treatment efficiency is improved. According to the surface treatment technology, the surface treatment efficiency of the self-lubricating bearing is improved, the self-lubricating bearing is cleaned, polished and subjected to surface activation, and the situation that normal proceeding of the follow-up surface treatment process is affected due to surface defects of the self-lubricating bearing is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of self-lubricating bearing processing, and particularly to a surface treatment process capable of improving the lubricity of self-lubricating bearings. Background Art

[0002] Self-lubricating bearings can operate without manual lubrication for a long time, significantly reducing maintenance costs and time. Due to the inclusion of solid lubricants in the material, self-lubricating bearings can reduce the friction coefficient, thereby extending the service life of the bearings. Self-lubricating bearings perform well in environments with large temperature variations (high and low), humidity changes, and are suitable for harsh working conditions. The low-friction characteristics of self-lubricating bearings contribute to reducing the operating noise of equipment, especially playing an important role in new energy vehicles and precision machinery. Self-lubricating bearings simplify the design and mechanical structure, reducing the need for equipment downtime for maintenance. Self-lubricating bearings do not require waste oil treatment, which is beneficial to environmental protection. Self-lubricating bearings can reduce the cleanliness of oil pipes and the safety level of lubrication. Self-lubricating bearings can be used without installing special lubrication equipment, greatly reducing the installation and usage costs. Self-lubricating bearings can meet the special lubrication requirements in some special environments and are suitable for environments without air and water penetration. The product structure of self-lubricating bearings can meet user requirements, having a certain space and weight, and offering greater flexibility in design.

[0003] With the development of industry, the demand for bearings is increasing, and the bearing life has attracted more and more attention. In production, many bearings are prone to damage and require frequent grinding and repair, seriously affecting the production progress and product quality. Therefore, people perform surface treatment on bearings to improve their own lubricity.

[0004] However, the traditional surface treatment process has the following disadvantages:

[0005] During the process of treating self-lubricating bearings with the traditional surface treatment process, after the coating material is coated on the bearing surface, it needs to wait for a period of time until the coating material is firmly fixed on the surface of the self-lubricating bearing before the next processing of the self-lubricating bearing can be carried out, reducing the processing efficiency of the self-lubricating bearing. Summary of the Invention

[0006] The purpose of the present invention is to provide a surface treatment process capable of improving the lubricity of self-lubricating bearings, so as to solve the problem that in the process of treating self-lubricating bearings with the traditional surface treatment process, after the coating material is coated on the bearing surface, it needs to wait for a period of time until the coating material is firmly fixed on the surface of the self-lubricating bearing before the next processing of the self-lubricating bearing can be carried out, reducing the processing efficiency of the self-lubricating bearing.

[0007] To achieve the above object, the present invention provides the following technical solutions: A surface treatment process capable of improving the lubricity of a self-lubricating bearing, comprising the following steps:

[0008] Step 1. Surface pretreatment: Pretreat the self-lubricating bearing before processing.

[0009] Step 2. Determine the coating composition: Determine the film composition of the coating according to the processing requirements of the self-lubricating bearing.

[0010] Step 3. Coating processing: Place the pretreated self-lubricating bearing in a coating device for coating processing.

[0011] Step 4. Vacuum treatment: Perform an operation to restore the atmospheric pressure in a vacuum chamber to complete the treatment process.

[0012] As a preferred technical solution of the present invention, the pretreatment in Step 1 includes cleaning, grinding, and surface activation.

[0013] As a preferred technical solution of the present invention, the specific process of the cleaning is as follows: S1. Equipment preparation: Before starting the cleaning operation, ensure that the ultrasonic cleaning equipment is in normal working condition, check whether the ultrasonic generator and transducer are normal, and confirm that there are no foreign objects in the cleaning tank; S2. Working fluid preparation: According to the characteristics and requirements of the cleaning object, select an appropriate cleaning fluid, usually a specially designed cleaning agent, to ensure its coordination with the vibration of the ultrasonic wave to improve the cleaning effect. When preparing the liquid, accurately configure the concentration and temperature according to the guidelines provided by the manufacturer; S3. Sample preparation: Place the self-lubricating bearing to be cleaned into the cleaning tank, ensure that there is no residual substance on the surface of the self-lubricating bearing to prevent affecting the cleaning effect, and reasonably arrange the position of the sample to ensure that the ultrasonic wave covers the entire cleaning surface; S4. Equipment adjustment: According to the nature of the cleaning object, adjust the frequency, power, and working time of the ultrasonic wave. Generally speaking, for different types of self-lubricating bearings, different ultrasonic parameters are required. In this stage, carefully refer to the equipment manual and the suggestions of the cleaning agent supplier; S5. Start cleaning: Start the cleaning equipment to ensure that the ultrasonic vibration is evenly transmitted throughout the cleaning tank. After starting the cleaning, regularly check the cleaning effect and adjust the cleaning time as needed. Gently shake the sample during the cleaning process to ensure that the cleaning fluid covers all surfaces; S6. Stop cleaning: After the cleaning is completed, turn off the ultrasonic cleaning equipment, take out the sample, and perform a final rinse with pure water or other appropriate cleaning fluid to remove the cleaning agent remaining on the surface of the sample; S7. Equipment maintenance: Regularly maintain the ultrasonic cleaning equipment, clean the transducer, check the ultrasonic generator, and promptly replace the aging transducer and other vulnerable parts to ensure the long-term stable operation of the equipment.

[0014] As a preferred technical solution of the present invention, the specific process of grinding is as follows: S1. Preparation work: Cut off the burrs on the outer ring, inner ring and raceway of the bearing. Through appearance quality control, prevent excessive sediment from being brought in by the burrs on the outer ring and inner ring, which may affect the grinding quality; S2. Rough grinding: Use a grinding machine to process the outer ring, inner ring and raceway of the bearing into a rough shape; S3. Polishing grinding: Use a polishing machine to polish the outer ring, inner ring and raceway, and at the same time process relevant radial clearance, suspension degree and roundness indexes; S4. Powder cleaning and washing: Remove the grinding powder and oil lead metal residues generated during grinding. After the bearing is ground, in addition to removing iron filings, it also prevents the oil quality from being contaminated by grinding chips or foreign objects in the later stage and from being oxidized and blackened due to friction; S5. Post-processing inspection: Inspect the bearing in a grinding machine or a special measuring instrument to ensure the quality of the grinding process, so that the size, roundness and surface of the bearing are defect-free.

[0015] As a preferred technical solution of the present invention, the specific process of surface activation is as follows: S1. Activation treatment: Immerse the processed bearing in a chemical solution to generate an adherent substance through a chemical reaction with the metal surface. This process adjusts the state of the activation film by controlling the reaction temperature, time and solution concentration to ensure the formation of a uniform and dense activation layer; S2. Post-treatment: Through steps of water washing, neutralization and drying, enhance the sealing and corrosion resistance of the activation film, ensure the firm bonding of the activation layer to the bearing surface, and improve the wear resistance and corrosion resistance of the bearing.

[0016] As a preferred technical solution of the present invention, the determination of the coating composition in step two is specifically as follows: Optimize the coating components and control the coating thickness. The optimized coating components have reasonable coating components, which are crucial for achieving self-lubrication. During the ion plating process, by regulating the proportion and distribution of coating elements, coatings with different properties can be obtained. Generally, coatings with a high carbon-nitrogen ratio and a small lattice constant are more conducive to realizing the self-lubrication function. Control the coating thickness. The coating thickness will directly affect its self-lubrication performance. Appropriately increasing the coating thickness can increase the storage amount and release speed of the lubricating oil, thereby enhancing the self-lubrication effect.

[0017] As a preferred technical solution of the present invention, the coating processing in step three is specifically as follows: The preparation of the GLC coating requires the use of vacuum ion plating technology. In a vacuum chamber, by controlling the energy and time of ion bombardment, carbon and nitrogen are deposited on the surface of the steel ball to form a uniform amorphous carbonized film. The GLC coating is an amorphous carbonized film composed of carbon and nitrogen, which contains a large number of micropores and microcracks. These micropores and microcracks can not only accommodate lubricating oil to form a lubricating film and continuously release it during movement, playing a self-lubrication effect.

[0018] As a preferred technical solution of the present invention, the specific process of the vacuum treatment in step four is as follows: S1. Connect the vacuum pump: Connect the vacuum pump on one side of the device; S2. Connect the air pressure detection device: Install an air pressure detection device for detecting air pressure above the device; S3. Inject gas: Inject gas into the device through the vacuum pump, and the air pressure detection device detects the gas in real time until the preset index is reached.

[0019] As a preferred technical solution of the present invention, when the air pressure returns to normal pressure in step four, the specific temperature is 0 °C and the pressure is 101.325 kPa.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. This surface treatment technology replaces the traditional coating technology. The preparation process is simple and the cost is low. In the vacuum chamber, by controlling the energy and time of ion bombardment, carbon and nitrogen are deposited on the surface of the steel ball to form a uniform amorphous carbonized film, eliminating the traditional waiting time and improving the surface treatment efficiency of the self-lubricating bearing;

[0022] 2. This surface treatment technology cleans, grinds, and surface-activates the self-lubricating bearing respectively, avoiding the situation that the subsequent surface treatment process is affected by the surface defects of the self-lubricating bearing itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the flow chart of the present invention;

[0024] Figure 2 is the flow chart of the cleaning of the present invention;

[0025] Figure 3 is the flow chart of the grinding of the present invention;

[0026] Figure 4 is the flow chart of the surface activation of the present invention;

[0027] Figure 5 is the flow chart of the vacuum treatment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1-5 , the present invention provides a surface treatment process capable of improving the lubricity of a self-lubricating bearing, including the following steps:

[0030] Step 1. Surface pretreatment: Pretreat the self-lubricating bearing before processing.

[0031] Step 2. Determine the coating composition: Determine the film composition of the coating according to the processing requirements of the self-lubricating bearing.

[0032] Step 3. Coating processing: Place the pretreated self-lubricating bearing in the coating equipment for coating processing.

[0033] Step 4. Vacuum treatment: Perform an operation to restore the atmospheric pressure in the vacuum chamber to complete the treatment process.

[0034] The pretreatment in Step 1 includes cleaning, grinding, and surface activation.

[0035] The specific process of cleaning is as follows: S1. Equipment preparation: Before starting the cleaning operation, ensure that the ultrasonic cleaning equipment is in normal working condition, check whether the ultrasonic generator and transducer are normal, and confirm that there are no foreign objects in the cleaning tank; S2. Working fluid preparation: According to the characteristics and requirements of the cleaning object, select an appropriate cleaning fluid, usually a specially designed cleaning agent, to ensure its coordination with the vibration of the ultrasonic wave and improve the cleaning effect. When preparing the liquid, accurately configure the concentration and temperature according to the guidelines provided by the manufacturer; S3. Sample preparation: Place the self-lubricating bearing to be cleaned into the cleaning tank, ensure that there is no residual substance on the surface of the self-lubricating bearing to prevent affecting the cleaning effect, and reasonably arrange the position of the sample to ensure that the ultrasonic wave covers the entire cleaning surface; S4. Equipment adjustment: According to the nature of the cleaning object, adjust the frequency, power, and working time of the ultrasonic wave. Generally speaking, for different types of self-lubricating bearings, different ultrasonic parameters are required. In this stage, carefully refer to the equipment manual and the suggestions of the cleaning agent supplier; S5. Start cleaning: Start the cleaning equipment to ensure that the ultrasonic vibration is evenly transmitted throughout the cleaning tank. After starting the cleaning, regularly check the cleaning effect and adjust the cleaning time as needed. Gently shake the sample during the cleaning process to ensure that the cleaning fluid covers all surfaces; S6. Stop cleaning: After the cleaning is completed, turn off the ultrasonic cleaning equipment, take out the sample, and perform a final rinse with pure water or other appropriate cleaning fluid to remove the cleaning agent remaining on the surface of the sample; S7. Equipment maintenance: Regularly maintain the ultrasonic cleaning equipment, clean the transducer, check the ultrasonic generator, and promptly replace the aging transducer and other vulnerable parts to ensure the long-term stable operation of the equipment.

[0036] The specific process of grinding is as follows: S1. Preparation work: Cut off the burrs on the outer ring, inner ring, and raceway of the bearing. Through appearance quality control, prevent excessive sediment from being brought in by the burrs on the outer ring and inner ring, which may affect the grinding quality; S2. Rough grinding: Use a grinding machine to process the outer ring, inner ring, and raceway of the bearing into a rough shape.

[0037] S3. Polishing and grinding: The outer ring, inner ring, and raceway are polished by a polishing machine, and relevant radial clearance, suspension degree, and roundness indicators are processed simultaneously; S4. Powder cleaning and washing: The grinding powder and oil lead metal residues generated during grinding are removed. After the bearing is ground, in addition to removing iron filings, it also prevents the oil quality from being contaminated by grinding debris or foreign objects and oxidation blackening caused by friction in the later stage; S5. Post-processing inspection: The bearing is inspected in a grinding machine or a special measuring instrument to ensure the quality of the grinding process, so that the bearing has no defects in size, roundness, and surface.

[0038] The specific process of surface activation is as follows: S1. Activation treatment: The processed bearing is immersed in a chemical solution, and an attachment substance is generated through a chemical reaction with the metal surface. The state of the activation film is adjusted by controlling the reaction temperature, time, and solution concentration to ensure the formation of a uniform and dense activation layer; S2. Post-treatment: Through steps of water washing, neutralization, and drying, the sealing performance and corrosion resistance of the activation film are enhanced, ensuring the firm bonding of the activation layer to the bearing surface and improving the wear resistance and corrosion resistance of the bearing.

[0039] The specific determination of the coating composition in step two is as follows: Optimize the coating components and control the coating thickness. Having reasonable coating components is crucial for achieving self-lubrication. During the ion plating process, by regulating the ratio and distribution of coating elements, coatings with different properties are obtained. Generally, coatings with a high carbon-nitrogen ratio and a small lattice constant are more conducive to achieving the self-lubrication function. Control the coating thickness. The coating thickness will directly affect its self-lubrication performance. Appropriately increasing the coating thickness can increase the storage amount and release speed of lubricating oil, thereby enhancing the self-lubrication effect.

[0040] The specific coating processing in step three is as follows: The preparation of the GLC coating requires the use of vacuum ion plating technology. In the vacuum chamber, by controlling the energy and time of ion bombardment, carbon and nitrogen are deposited on the surface of the steel ball to form a uniform amorphous carbon film. The GLC coating is an amorphous carbon film composed of carbon and nitrogen, which contains a large number of micropores and microcracks. These micropores and microcracks can not only accommodate lubricating oil to form a lubricating film and continuously release it during movement, achieving the self-lubrication effect.

[0041] The specific process of vacuum treatment in step four is as follows: S1. Connect the vacuum pump: Connect the vacuum pump on one side of the equipment; S2. Connect the air pressure detection device: Install an air pressure detection device for detecting air pressure above the equipment; S3. Inject gas: Inject gas into the equipment through the vacuum pump, and the air pressure detection device detects the gas in real time until the preset index is reached.

[0042] In step four, when the air pressure returns to normal pressure, the specific temperature is 0 °C and the pressure is 101.325 kPa.

[0043] In the present invention, before processing the self-lubricating bearing, it is pre-treated. Before starting the cleaning operation, ensure that the ultrasonic cleaning equipment is in normal working condition, check whether the ultrasonic generator and transducer are normal, and confirm that there are no foreign objects in the cleaning tank; according to the characteristics and requirements of the cleaning object, select an appropriate cleaning liquid, usually a specially designed cleaning agent, to ensure its coordination with the vibration of the ultrasonic wave and improve the cleaning effect. When preparing the liquid, accurately configure the concentration and temperature according to the guidelines provided by the manufacturer; place the self-lubricating bearing to be cleaned into the cleaning tank, ensure that there is no residual substance on the surface of the self-lubricating bearing to prevent affecting the cleaning effect, and reasonably arrange the position of the sample to ensure that the ultrasonic wave covers the entire cleaning surface; according to the nature of the cleaning object, adjust the frequency, power and working time of the ultrasonic wave. Generally speaking, for different types of self-lubricating bearings, different ultrasonic parameters are required. At this stage, carefully refer to the equipment manual and the suggestions of the cleaning agent supplier; start the cleaning equipment to ensure that the ultrasonic vibration is evenly transmitted throughout the cleaning tank. After starting the cleaning, regularly check the cleaning effect and adjust the cleaning time as needed. Gently shake the sample during the cleaning process to ensure that the cleaning liquid covers all surfaces; after the cleaning is completed, turn off the ultrasonic cleaning equipment, take out the sample, and perform a final rinse with pure water or other appropriate cleaning liquid to remove the cleaning agent remaining on the surface of the sample; regularly maintain the ultrasonic cleaning equipment, clean the transducer, check the ultrasonic generator, and promptly replace the aging transducer and other vulnerable parts to ensure the long-term stable operation of the equipment. Cut off the burrs on the outer ring, inner ring and raceway of the bearing. Through appearance quality control, prevent the excessive sand and mud brought in by the burrs on the outer ring and inner ring from affecting the grinding quality; process the outer ring, inner ring and raceway of the bearing into a rough shape through a grinding machine; polish the outer ring, inner ring and raceway through a polishing machine, and at the same time process the relevant radial clearance, suspension degree and roundness indexes; remove the grinding powder and oil lead metal residues generated during grinding. After the bearing is ground and cleaned, in addition to removing iron filings, it also prevents the oil quality from being contaminated by grinding chips or foreign objects and oxidation blackening caused by friction in the later stage; detect the bearing in a grinding machine or a special measuring instrument to ensure the quality of the grinding process, so that the size, roundness and surface of the bearing are defect-free. Immerse the processed bearing in a chemical solution to generate an adherent substance through a chemical reaction with the metal surface. This process adjusts the state of the activation film by controlling the reaction temperature, time and solution concentration to ensure the formation of a uniform and dense activation layer; through the steps of water washing, neutralization and drying, enhance the sealing and corrosion resistance of the activation film, ensure the firm combination of the activation layer with the bearing surface, and improve the wear resistance and corrosion resistance of the bearing. Determine the film composition of the coating according to the processing requirements of the self-lubricating bearing; place the pre-treated self-lubricating bearing in the coating equipment for coating processing;Using vacuum ion plating technology, in a vacuum chamber, by controlling the energy and time of ion bombardment, carbon and nitrogen are deposited on the surface of the steel balls to form a uniform amorphous carbonized film. The GLC coating is an amorphous carbonized film composed of carbon and nitrogen, which contains a large number of micropores and microcracks. These micropores and microcracks can not only accommodate lubricating oil to form a lubricating film and continuously release it during movement, achieving a self-lubricating effect, but also perform an operation of restoring the atmospheric pressure in the vacuum chamber to complete the treatment process.

[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A surface treatment process capable of improving the lubricity of a self-lubricating bearing, characterized in that: It includes the following steps: Step 1, Surface pretreatment: Pretreat the self-lubricating bearing before processing; Step 2, Determine the coating composition: Determine the film composition of the coating according to the processing requirements of the self-lubricating bearing; Step 3, Coating processing: Place the pretreated self-lubricating bearing in the coating equipment for coating processing; Step 4, Vacuum treatment: Perform an operation to restore the air pressure to normal pressure in the vacuum chamber to complete the treatment process.

2. The surface treatment process for improving the lubricity of a self-lubricating bearing according to claim 1, characterized in that: The pretreatment in Step 1 includes cleaning, grinding, and surface activation.

3. The surface treatment process for improving the lubricity of a self-lubricating bearing according to claim 2, wherein: The specific process of the cleaning is as follows: S1, Equipment preparation: Before starting the cleaning operation, ensure that the ultrasonic cleaning equipment is in normal working condition, check whether the ultrasonic generator and transducer are normal, and confirm that there are no foreign objects in the cleaning tank; S2, Working fluid preparation: According to the characteristics and requirements of the cleaning object, select an appropriate cleaning liquid, usually use a specially designed cleaning agent, ensure that it is coordinated with the vibration of the ultrasonic wave to improve the cleaning effect, and accurately configure the concentration and temperature according to the guidelines provided by the manufacturer when preparing the liquid; S3, Sample preparation: Place the self-lubricating bearing to be cleaned into the cleaning tank, ensure that there is no residual substance on the surface of the self-lubricating bearing to prevent affecting the cleaning effect, and reasonably arrange the position of the sample to ensure that the ultrasonic wave covers the entire cleaning surface; S4, Equipment adjustment: According to the nature of the cleaning object, adjust the frequency, power, and working time of the ultrasonic wave. Generally speaking, different ultrasonic parameters are required for different types of self-lubricating bearings. In this stage, carefully refer to the equipment manual and the suggestions of the cleaning agent supplier; S5, Start cleaning: Start the cleaning equipment to ensure that the ultrasonic vibration is evenly transmitted to the entire cleaning tank. After starting the cleaning, regularly check the cleaning effect and adjust the cleaning time as needed. Gently shake the sample during the cleaning process to ensure that the cleaning liquid covers all surfaces; S6, Stop cleaning: After the cleaning is completed, turn off the ultrasonic cleaning equipment, take out the sample, and perform a final rinse with pure water or other appropriate cleaning liquid to remove the cleaning agent remaining on the surface of the sample; S7, Equipment maintenance: Regularly maintain the ultrasonic cleaning equipment, clean the transducer, check the ultrasonic generator, and promptly replace the aging transducer and other vulnerable parts to ensure the long-term stable operation of the equipment.

4. A surface treatment process for improving the lubricity of a self-lubricating bearing according to claim 2, characterized in that: The specific process of the grinding is as follows: S1, Preparation work: Cut off the machining burrs of the bearing outer ring, inner ring, and raceway. Through appearance quality control, prevent excessive sediment from being brought in by the burrs of the outer ring and inner ring, which may affect the grinding quality; S2, Rough grinding: Use a grinding machine to process the outer ring, inner ring, and raceway of the bearing into a rough shape; S3, Polishing grinding: Polish the outer ring, inner ring, and raceway with a polishing machine, and at the same time process the relevant radial clearance, suspension degree, and roundness indexes; S4, Powder cleaning and washing: Remove the grinding powder and oil lead metal residues generated during grinding. After the bearing is ground, cleaning not only removes iron filings but also prevents the oil quality from being contaminated by grinding chips or foreign objects and oxidation blackening caused by friction in the later stage; S5, Post-processing inspection: Inspect the bearing in a grinding machine or a special measuring instrument to ensure the quality of the grinding process, so that the size, roundness, and surface of the bearing are free of defects.

5. A surface treatment process capable of improving the lubricity of a self-lubricating bearing according to claim 2, characterized in that: The specific process of surface activation is as follows: S1. Activation treatment: Immerse the processed bearing in a chemical solution to generate an adhering substance through a chemical reaction with the metal surface. The state of the activation film is adjusted by controlling the reaction temperature, time, and solution concentration to ensure the formation of a uniform and dense activation layer; S2. Post-treatment: Through the steps of water washing, neutralization, and drying, enhance the sealing and corrosion resistance of the activation film, ensure the firm bonding of the activation layer to the bearing surface, and improve the wear resistance and corrosion resistance of the bearing.

6. A surface treatment process for improving the lubricity of a self-lubricating bearing according to claim 1, characterized in that: The specific determination of the coating composition in step 2 is as follows: Optimize the coating components and control the coating thickness. The optimized coating components have reasonable coating components, which are crucial for achieving self-lubrication. During the ion plating process, by regulating the ratio and distribution of coating elements, coatings with different properties are obtained. Generally, coatings with a high carbon-nitrogen ratio and a small lattice constant are more conducive to realizing the self-lubrication function. Control the coating thickness, as the coating thickness will directly affect its self-lubrication performance. Appropriately increasing the coating thickness can increase the storage amount and release speed of the lubricating oil, thereby enhancing the self-lubrication effect.

7. A surface treatment process for improving the lubricity of a self-lubricating bearing according to claim 1, characterized in that: The specific coating process in step 3 is as follows: The preparation of the GLC coating requires the use of vacuum ion plating technology. In the vacuum chamber, by controlling the energy and time of ion bombardment, carbon and nitrogen are deposited on the surface of the steel ball to form a uniform amorphous carbonized film. The GLC coating is an amorphous carbonized film composed of carbon and nitrogen, which contains a large number of micropores and microcracks. These micropores and microcracks can not only accommodate the lubricating oil to form a lubricating film and continuously release it during movement, thus achieving the self-lubrication effect.

8. A surface treatment process for improving the lubricity of a self-lubricating bearing according to claim 1, characterized in that: The specific process of vacuum treatment in step 4 is as follows: S1. Connect the vacuum pump: Connect the vacuum pump to one side of the equipment; S2. Connect the air pressure detection device: Install an air pressure detection device above the equipment to detect the air pressure; S3. Inject gas: Inject gas into the equipment through the vacuum pump, and the air pressure detection device continuously detects the gas until the preset index is reached.

9. A surface treatment process for improving the lubricity of a self-lubricating bearing according to claim 1, characterized in that: When the air pressure returns to normal pressure in step 4, the specific temperature is 0°C and the pressure is 101.325 kPa.

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