Repairing method for rapidly repairing bearing surface

Abstract

The invention discloses a repairing method for quickly repairing the surface of a bearing. The repairing method comprises the following steps: providing a composite bearing to be repaired; the abrasion type of the composite material layer of the composite bearing to be repaired is analyzed; when the abrasion type is adhesive abrasion, the repairing structure comprises two layers, namely a bottom coating and an abrasion-resistant layer; when the abrasion type is abrasive grain abrasion, the repairing structure comprises a bottom coating and an abrasion-resistant layer. When the abrasion type is fatigue abrasion, the repairing structure comprises a bottom coating, a reinforcing layer and an antifriction lubricating layer. According to different abrasion types, the composite bearing to be repaired is coated with the repairing material in a blade coating mode, and then all layers are subjected to light curing; and after curing, abrasive paper is used for surface polishing treatment, and the convex points are removed. According to the repairing method, the surface of the lining can be quickly repaired according to different abrasion types of the lining, so that the shutdown maintenance time can be shortened, the service life of the original lining is prolonged, and the stable performance of the lining is kept.

Description

Technical Field

[0001] This invention belongs to the field of self-lubricating materials technology, and in particular, a repair method for quickly repairing bearing surfaces. Background Technology

[0002] Polymer self-lubricating bearings are composite material bearings that combine the strength of metals with the self-lubricating properties of polymers. Their core structure typically consists of a metal matrix such as copper alloys, steel, or aluminum, and a polymer material, such as polytetrafluoroethylene (PTFE), polyetheretherketone (PEEK), or modified polyoxymethylene (POM), embedded in or coated onto the surface of this metal matrix. This bearing design not only possesses the high load-bearing capacity and good corrosion resistance of metals but also incorporates the self-lubricating properties of polymers, significantly reducing friction and wear and improving the efficiency of mechanical systems. In terms of applications, polymer self-lubricating bearings are widely used in various industrial fields. For example, in the automotive industry, they are used in key components such as engines, transmissions, and steering systems. In the construction machinery field, heavy machinery such as excavators and loaders also extensively uses these bearings. In food processing equipment, due to their self-lubricating properties and cleanliness, they are particularly suitable for environments requiring oil-free lubrication. Furthermore, medical equipment, aerospace, and other fields also have a wide demand for polymer self-lubricating bearings.

[0003] Polymer self-lubricating bearings come in various models and types, such as oil-impregnated sintered metal bearings, self-lubricating metal-polymer bearings, and lubrication-free solid polymer bearings. Among them, self-lubricating metal-polymer bearings are the most common. They consist of a metal backing and a thin polymer liner containing solid lubricant. During operation, the lubricant is transferred to the shaft to form a lubricating film, thereby achieving excellent self-lubricating performance.

[0004] However, when the aforementioned self-lubricating bearing is used with an interference fit or welding to tightly fix the bearing sleeve to the seat, and then the entire seat is matched with the grinding shaft to form a friction pair, the bearing will inevitably malfunction due to wear after a period of use. In this case, the entire seat needs to be replaced for maintenance. However, the value of some seat components, or the cost of disassembling and assembling them, far exceeds the value of the bearing, resulting in significant waste during replacement or disassembly, and also a longer downtime for maintenance. Summary of the Invention

[0005] In view of this, the present invention provides a repair method for quickly repairing bearing surfaces that can solve the above problems.

[0006] A repair method for quickly repairing bearing surfaces includes the following steps:

[0007] STEP101: Provide a composite bearing to be repaired, the composite bearing comprising a metal substrate layer and a composite material layer disposed on the metal substrate layer;

[0008] STEP102: Analyze the wear type of the composite material layer of the composite bearing to be repaired, including adhesive wear, abrasive wear, and fatigue wear;

[0009] STEP103: When the wear type of the composite material layer of the composite bearing to be repaired is adhesive wear, a repair structure and material with anti-adhesion capability is provided. The repair structure includes two layers: the first layer is a base coating layer disposed on the composite bearing to be repaired, and the second layer is a wear-resistant layer disposed on the base coating layer.

[0010] STEP104: When the wear type of the composite material layer of the composite bearing to be repaired is abrasive wear, a repair structure and material are provided to improve the scratch resistance of the material itself. The repair structure includes a base coating layer disposed on the composite bearing to be repaired, and a wear-resistant layer disposed on the base coating layer.

[0011] STEP105: When the wear type of the composite material of the composite bearing to be repaired is fatigue wear, a repair structure and material are provided to improve the fatigue strength of the material. The repair structure includes a base coating layer disposed on the composite bearing to be repaired, a reinforcing layer disposed on the base coating layer, and a friction-reducing and lubricating layer disposed on the reinforcing layer.

[0012] STEP106: Apply the repair material to the composite bearing to be repaired for different wear types and then perform light curing on each layer separately;

[0013] STEP107: After curing, use sandpaper to polish the surface to remove bumps, making the transition area between the repaired area and the original composite material area smooth and forming a natural transition.

[0014] Furthermore, the metal substrate layer can be made of copper alloy, copper, and aluminum alloy, and is rolled into a tubular structure. The composite material layer can be applied to the metal substrate layer by a scraping, rolling, or sintering process.

[0015] Furthermore, in order to make the repair material liquid before use, it is necessary to heat the repair material at a temperature of 60°C to 80°C.

[0016] Furthermore, the curing equipment can be a point light source light curing device.

[0017] Further, in step STEP 103, the formulation and weight percentage content of the base coating are 80-90% THEICTA, 10-20% coupling agent, and 1-10% curing agent; the formulation and weight percentage content of the wear-resistant layer are 70-80% THEICTA, 10-20% reinforcing material, 10-20% friction-reducing material, and 1-10% curing agent.

[0018] Furthermore, after the base coat and wear-resistant layer are scraped, the base coat and wear-resistant layer are respectively subjected to low-power long-term photocuring. The photocuring parameters are 300mw / cm2 and the time is 30s.

[0019] Further, in step STEP 104, the formulation and weight percentage content of the primer layer are 80-90% THEICTA, 10-20% coupling agent, and 1-10% curing agent. The formulation and weight percentage content of the wear-resistant layer are 80-90% THEICTA, 5-8% reinforcing material, 10-15% lubricating material, and 1-5% curing agent.

[0020] Furthermore, after the base coat and wear-resistant layer are scraped, the base coat and wear-resistant layer are respectively subjected to high-power short-time photocuring with curing parameters of 500mw / cm2 and curing time of 15s.

[0021] Further, in step STEP 105, the formulation and weight percentage content of the base coating are: THEICTA 80-90%, coupling agent 10-20%, and curing agent 1-10%. The formulation and weight percentage content of the reinforcing layer are: THEICTA 70-80%, reinforcing material 10-20%, lubricating material 10-20%, and curing agent 1-10%. The formulation and weight percentage content of the friction-reducing lubricating layer are: THEICTA 70-80%, reinforcing material 1-5%, lubricating material 25-30%, and curing agent 1-5%.

[0022] Furthermore, after the base coat, reinforcement layer, and friction-reducing lubricating layer are scraped, the base coat, reinforcement layer, and friction-reducing lubricating layer are respectively subjected to high-power short-time photocuring. The photocuring parameters are 500mw / cm2, and the curing time is about 15s.

[0023] Compared with existing technologies, the repair method for quickly repairing bearing surfaces provided by this invention can rapidly repair the surface of bushings for different wear types. This avoids unnecessary replacement of the bearing base, reduces downtime for maintenance, extends the service life of the original bushing, and maintains its performance stability, thereby saving time and costs and improving efficiency. Specifically, during repair, a layer of coupling agent material with THEICTA as the main component and about 10% is first applied to the worn area as a base coat. After rapid light curing, a reinforcing material with THEICTA as the main component and about 20% is applied on the surface of the base coat as a reinforcing layer to improve load-bearing capacity. After rapid light curing, a lubricant with THEICTA as the main component and 20% is applied on the surface of the reinforcing layer as a friction-reducing layer to improve the friction-reducing effect. Alternatively, a lubricant with THEICTA as the main component and 20% is applied directly on the base coat as a friction-reducing layer. Finally, the thickness and edge transition layer are polished with 2000-mesh metallographic sand to ensure tolerance. The three-layer structure complements each other, connecting the upper and lower layers. While achieving better adhesion, it also repairs worn bushings and extends their service life. Detailed Implementation

[0024] The following provides a more detailed description of specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the scope of protection of the present invention.

[0025] A repair method for quickly repairing bearing surfaces includes the following steps:

[0026] STEP101: Provides a composite bearing to be repaired, the composite bearing comprising a metal substrate layer and a composite material layer disposed on the metal substrate layer.

[0027] The metal substrate layer can be made of copper alloy, copper, or aluminum alloy, and can be rolled into a tubular structure. The composite material layer can be applied to the metal substrate layer through processes such as coating, rolling, or sintering. The preparation method of the composite bearing is existing technology and will not be described in detail here. The material of the composite material layer may have different compositions depending on the application, such as using PTFE, PEEK, POM, etc. as the main material. Different main materials have different applications due to their different properties. For example, PEEK has high strength and therefore good fatigue resistance, making it suitable for applications with high loads.

[0028] STEP 102: Analyze the wear type of the composite material layer of the composite bearing to be repaired. The wear types include adhesive wear, abrasive wear, and fatigue wear. In STEP 102, adhesive wear, also known as seizing wear, refers to the local adhesion between the metal and the composite material layer at the contact surface of the friction pair during sliding friction. In subsequent relative sliding, the adhesion is broken, resulting in metal fragments or the composite material layer being pulled off their respective surfaces, or the surface of the part being scratched. Adhesive wear often occurs in applications with little or no oil lubrication. It is understandable that the type of wear is not significantly related to the material itself, but mainly to the material formulation and the application environment. Different material formulations and different friction systems will result in different wear conditions. For example, with polyoxymethylene (POM), adhesive wear is less likely to occur under oil lubrication conditions; abrasive wear and fatigue wear are more common. However, adhesive wear is more likely to occur under dry friction conditions.

[0029] Abrasive wear refers to the loss or material loss caused by the compression and movement of hard particles or hard micro-protrusions on the surface of a solid surface during friction.

[0030] Fatigue wear refers to the process where, during pure rolling or a combination of rolling and sliding friction between two contacting surfaces, under high contact compressive stress and after multiple force cycles, small pieces of material peel off in localized areas of the interacting surfaces, forming pits or depressions. This type of surface fatigue wear is also known simply as fatigue wear.

[0031] STEP 103: When the wear type of the composite material layer of the composite bearing to be repaired is adhesive wear, a repair structure and material with anti-adhesion capability are provided. The repair structure includes two layers: a first layer is a base coating layer applied to the composite bearing to be repaired, and a second layer is a wear-resistant layer applied to the base coating layer. The base coating layer has the following formulation and weight percentage: THEICTA 80-90%, coupling agent 10-20%, and curing agent 1-10%. The wear-resistant layer has the following formulation and weight percentage: THEICTA 70-80%, reinforcing material 10-20%, friction-reducing material 10-20%, and curing agent 1-10%. Simultaneously, low-power, long-time photocuring is performed. The photocuring parameters are 300 mw / cm², and the time is approximately 30 seconds.

[0032] Since the primer does not contact the mating parts and does not contribute to friction and wear, the formulation only uses THEICTA base material and a coupling agent to enhance adhesion. This allows full utilization of THEICTA's excellent self-flowing and self-adhesive properties to compensate for any defects.

[0033] THEICTA, or tri(2-hydroxyethyl) isocyanurate triacrylate, possesses characteristics such as high-efficiency curing and excellent weather resistance, but it has never been used in bearing materials. THEICTA material itself has good wear resistance and scratch resistance, thus it has the potential for use in bearing materials; however, its high viscosity makes it difficult to prepare in bearing materials through rolling processes.

[0034] THEICTA-based materials have a cross-linked network molecular structure. This cross-linked network inhibits molecular chain slippage, resulting in smaller fluctuations in the coefficient of friction, especially under unlubricated conditions, where it is significantly superior to thermoplastic materials. The cross-linked structure maintains mechanical strength (such as compressive and shear resistance) and has better resistance to plastic deformation than thermoplastic materials. Therefore, whether at room temperature or high temperature (200 degrees Celsius), the wear mechanism is mainly slight abrasive wear and fatigue wear, resulting in a low wear rate. On the other hand, the cross-linked network inhibits creep, making the material more suitable for long-term high-temperature load conditions. At the same time, THEICTA-based materials have a low coefficient of thermal expansion and minimal dimensional changes at high temperatures, ensuring the precision of the fit with the friction pair.

[0035] Therefore, in this invention, THEICTA material itself possesses excellent anti-adhesion capabilities, so it is used as the main structure, supplemented by friction-reducing material PTFE and reinforcing materials such as inorganic fillers. Furthermore, because it is a repair material, its load-bearing capacity is required to be higher; therefore, some reinforcing materials need to be added to improve the overall load-bearing performance of the material.

[0036] When selecting curing equipment, higher power results in faster curing, but this also leads to higher surface hardness of the material, affecting its impact resistance. Therefore, a low power of 300mw / cm² is generally used for curing to avoid the material becoming brittle. In this embodiment, the curing agent used is grade 184.

[0037] In addition, in order to make the repair material liquid before use, it is necessary to heat the repair material at a temperature of 60°C to 80°C.

[0038] STEP104: When the wear type of the composite material layer of the composite bearing to be repaired is abrasive wear, a repair structure and material are provided to improve the scratch resistance of the material itself. The repair structure includes a base coating layer disposed on the composite bearing to be repaired, and a wear-resistant layer disposed on the base coating layer. The formula and weight percentage content of the base coating layer are 80-90% THEICTA, 10-20% coupling agent, and 1-10% curing agent. The formula and weight percentage content of the wear-resistant layer layer are 80-90% THEICTA, 5-8% reinforcing material, 10-15% lubricating material, and 1-5% curing agent, and it is subjected to high-power short-time photocuring with curing parameters of 500mw / cm2 and curing time of 15s.

[0039] Since the primer does not contact the mating parts and does not contribute to friction and wear, the formulation only uses THEICTA base material and a coupling agent to enhance adhesion. This allows full utilization of THEICTA's excellent self-flowing and self-adhesive properties to compensate for any defects.

[0040] Because THEICTA material itself possesses excellent scratch resistance, materials containing THEICTA exhibit scratch resistance. Furthermore, the addition of PTFE, a friction-reducing material, achieves a self-lubricating effect. Since this is a repair material, its load-bearing capacity is required to be higher; therefore, reinforcing materials are added to improve the overall load-bearing performance. These reinforcing materials are nanofillers, such as nano-silica, titanium dioxide, carbon nanotubes, and graphene. The curing agent can be of type 184. Because this repair addresses abrasive wear, higher surface strength is needed to enhance the material's resistance to abrasive wear; therefore, a high curing power of 500 mw / cm² is required.

[0041] In addition, in order to make the repair material liquid before use, it is necessary to heat the repair material at a temperature of 60°C to 80°C.

[0042] STEP105: When the wear type of the composite material of the composite bearing to be repaired is fatigue wear, a repair structure and material are provided to improve the fatigue strength of the material. The repair structure includes a base coating layer disposed on the composite bearing to be repaired, a reinforcing layer disposed on the base coating layer, and a friction-reducing and lubricating layer disposed on the reinforcing layer. The formula and weight percentage content of the base coating layer are 80-90% THEICTA, 10-20% coupling agent, and 1-10% curing agent. The formula and weight percentage content of the reinforcing layer are 70-80% THEICTA, 10-20% reinforcing material, 10-20% lubricating material, and 1-10% curing agent. The formula and weight percentage content of the friction-reducing and lubricating layer are 70-80% THEICTA, 1-5% reinforcing material, 25-30% lubricating material, and 1-5% curing agent, and are subjected to high-power short-time photocuring with photocuring parameters of 500mw / cm2 and a curing time of approximately 15s.

[0043] Similarly, the primer does not provide friction and wear resistance; however, it can utilize the excellent self-flow properties of THEICTA material to compensate for defects.

[0044] Since fatigue wear is often caused by insufficient strength, a reinforcing layer is added in this case. The THEICTA material in the reinforcing layer provides scratch resistance, while the lubricating material acts as a self-lubricant. The lubricating material is PTFE, graphite, or molybdenum disulfide, with PTFE being preferred. The reinforcing material is a nanofiller, such as nano-silica, titanium dioxide, carbon nanotubes, and graphene, used to improve the overall wear resistance and load-bearing capacity of the composite material. The photocuring agent is grade 184. This reinforcing layer improves the strength of the repair structure and also provides lubrication, preventing damage caused by the lack of lubrication in the repair structure due to occasional damage to the friction-reducing lubricating layer.

[0045] The raw material formula of the friction-reducing lubricating layer is the same as that of the reinforcing layer, except that the content of lubricating material in the friction-reducing lubricating layer is increased to improve the lubrication performance of the friction-reducing lubricating layer.

[0046] Because higher curing power results in greater surface strength of the composite material, and greater strength translates to stronger load-bearing capacity, a higher proportion of filler in this step necessitates a correspondingly higher curing power. Therefore, the photocuring parameters are 500 mW / cm², with a curing time of approximately 15 seconds.

[0047] In addition, in order to make the repair material liquid before use, it is necessary to heat the repair material at a temperature of 60°C to 80°C.

[0048] STEP106: For different types of wear, after applying the repair material to the composite bearing to be repaired, each layer is light-cured separately.

[0049] In STEP106, the curing equipment can be a point light source light curing device, which can meet various light curing application scenarios.

[0050] STEP107: After curing, use sandpaper to polish the surface to remove bumps, making the transition area between the repaired area and the original composite material area smooth and forming a natural transition.

[0051] The sandpaper used has a grit of 2000.

[0052] Example 1: A primer coating was formulated with 85% THEICTA, 10% coupling agent, and 5% curing agent. The wear-resistant layer consisted of 75% THEICTA, 10% reinforcing material, 10% friction-reducing material, and 5% curing agent. The curing parameters were 300 mw / cm², and the curing time was 15 s. Defective PTFE-based bushings were repaired using this method. After repair, cross-sectional metallographic analysis revealed that the repaired bushing interface had virtually no porosity, indicating that the repair material possessed good self-flowing and adhesion properties.

[0053] Example 2: A PTFE base bushing was repaired using a base coat formulation of 85% THEICTA, 10% coupling agent, and 5% curing agent, with a curing parameter of 300mw / cm2+15s. The wear-resistant layer consisted of 75% THEICTA, 10% reinforcing material, 10% friction-reducing material, and 5% curing agent, with a curing parameter of 300mw / cm2 and a curing time of 15s.

[0054] Comparative Example 1: Intact PTFE base bushing

[0055] First, Example 2 and Comparative Example 1 were subjected to compression deformation tests with a test load of 150 MPa and a test time of 15 s.

[0056] Table 1. Data from Compression Deformation Test

[0057] Bushing type Compression deformation Comparative Example 1 0.012mm Example 2 0.009mm

[0058] The compression deformation of the repaired bushing is basically the same as that of the intact PTFE base bushing, indicating that the repair is effective and will not affect the overall compression deformation resistance of the bushing.

[0059] Next, Example 2 and Comparative Example 1 were subjected to extreme PV tests under the following conditions: 20 MPa, 0.5 m / s, 8 h, with initial grease lubrication.

[0060] Table 2. Extreme PV Test Data

[0061] Bushing type Final temperature coefficient of friction Wear Comparative Example 1 86℃ 0.079 0.027mm Example 2 79℃ 0.083 0.019mm

[0062] The test results show that the repaired bushing has essentially the same final temperature, friction coefficient, and wear as the intact bushing, indicating that the repaired bushing has good friction and wear performance and that the material's own properties are not affected by the repair.

[0063] Meanwhile, the wear debris after the extreme PV test was analyzed. The wear debris size of the intact PTFE base bushing was about 100 μm, which was relatively large. However, the wear debris size of the repaired PTFE base bushing was about 50 μm, indicating that the wear debris of the repaired bushing was significantly reduced, and the bushing's resistance to adhesive wear was improved.

[0064] Example 3: A primer coating was prepared using a formulation of 85% THEICTA, 10% coupling agent, and 5% curing agent. The curing parameters were 300 mw / cm², and the curing time was 15 s. A wear-resistant layer was prepared using 85% THEICTA, 5% reinforcing material, 5% friction-reducing material, and 5% curing agent. The curing parameters were 500 mw / cm², and the curing time was 5 s. This was used to repair a PTFE base bushing.

[0065] Comparative Example 1: Intact PTFE base bushing.

[0066] Example 3 and Comparative Example 1 were subjected to end-face friction and wear performance tests. The test conditions were 10 MPa, 0.4 m / s, 3 h, and one-time grease lubrication. It is worth noting that the surface roughness of the selected grinding parts was Ra1.2, which is significantly higher than the roughness requirement for grinding parts in conventional tests. The purpose was to test the performance of abrasive wear resistance.

[0067] Table 3: Test Data of Friction and Wear Performance

[0068] Bushing type Final temperature coefficient of friction Wear Comparative Example 1 122℃ 0.077 0.037mm Example 3 91℃ 0.053 0.015mm

[0069] Based on the experimental data, Example 3 showed significantly better performance than Comparative Example 1 in terms of final temperature, friction coefficient, and wear amount, indicating that the repaired bushing was significantly better than the PTFE-based bushing in terms of resistance to abrasive wear.

[0070] Example 4: The base coating uses a formulation of 85% THEICTA, 10% coupling agent, and 5% curing agent, with curing parameters of 300 mw / cm² and a curing time of 15 s. The reinforcing layer uses a formulation of 75% THEICTA, 10% reinforcing material, 10% friction-reducing material, and 5% curing agent, with curing parameters of 500 mw / cm² and a curing time of 15 s. The friction-reducing layer uses a formulation of 65% THEICTA, 10% reinforcing material, 20% friction-reducing material, and 5% curing agent, with curing parameters of 500 mw / cm² and a curing time of 15 s to repair the PTFE base bushing.

[0071] Comparative Example 1: Intact PTFE base bushing

[0072] Durability PV tests were conducted on Example 4 and Comparative Example 1 under the following conditions: 15 MPa, 0.5 m / s, 20 h, with single-use grease lubrication. The purpose of the tests was to study the fatigue strength of the materials.

[0073] Bushing type Final temperature coefficient of friction Wear Comparative Example 1 89℃ 0.056 0.063mm Example 4 83℃ 0.061 0.037mm

[0074] Based on the test data, Example 4 is significantly better than Comparative Example 1 in terms of wear resistance, indicating that the repaired bushing is significantly better than the PTFE-based bushing in terms of fatigue strength, demonstrating a good repair effect.

[0075] Compared with existing technologies, the repair method for quickly repairing bearing surfaces provided by this invention can rapidly repair the surface of bushings for different wear types. This avoids unnecessary replacement of the bearing base, reduces downtime for maintenance, extends the service life of the original bushing, and maintains its performance stability, thereby saving time and costs and improving efficiency. Specifically, during repair, a layer of coupling agent material with THEICTA as the main component and about 10% is first applied to the worn area as a base coat. After rapid light curing, a reinforcing material with THEICTA as the main component and about 20% is applied on the surface of the base coat as a reinforcing layer to improve load-bearing capacity. After rapid light curing, a lubricant with THEICTA as the main component and 20% is applied on the surface of the reinforcing layer as a friction-reducing layer to improve the friction-reducing effect. Alternatively, a lubricant with THEICTA as the main component and 20% is applied directly on the base coat as a friction-reducing layer. Finally, the thickness and edge transition layer are polished with 2000-mesh metallographic sand to ensure tolerance. The three-layer structure complements each other, connecting the upper and lower layers. While achieving better adhesion, it also repairs worn bushings and extends their service life.

[0076] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions or improvements within the spirit of the present invention are covered within the scope of the claims of the present invention.

Claims

1. A repair method for quickly repairing bearing surfaces, comprising the following steps: STEP101: Provide a composite bearing to be repaired, the composite bearing comprising a metal substrate layer and a composite material layer disposed on the metal substrate layer; STEP102: Analyze the wear type of the composite material layer of the composite bearing to be repaired, including adhesive wear, abrasive wear, and fatigue wear; STEP103: When the wear type of the composite material layer of the composite bearing to be repaired is adhesive wear, a repair structure and material with anti-adhesion capability is provided. The repair structure includes two layers: the first layer is a base coating layer disposed on the composite bearing to be repaired, and the second layer is a wear-resistant layer disposed on the base coating layer. STEP104: When the wear type of the composite material layer of the composite bearing to be repaired is abrasive wear, a repair structure and material are provided to improve the scratch resistance of the material itself. The repair structure includes a base coating layer disposed on the composite bearing to be repaired, and a wear-resistant layer disposed on the base coating layer. STEP105: When the wear type of the composite material of the composite bearing to be repaired is fatigue wear, a repair structure and material are provided to improve the fatigue strength of the material. The repair structure includes a base coating layer disposed on the composite bearing to be repaired, a reinforcing layer disposed on the base coating layer, and a friction-reducing and lubricating layer disposed on the reinforcing layer. STEP106: Apply the repair material to the composite bearing to be repaired for different wear types and then perform light curing on each layer separately; STEP107: After curing, use sandpaper to polish the surface to remove bumps, making the transition area between the repaired area and the original composite material area smooth and forming a natural transition.

2. The repair method for rapidly repairing bearing surfaces as described in claim 1, characterized in that: The metal substrate layer can be made of copper alloy, copper, and aluminum alloy, and is rolled into a tubular structure. The composite material layer can be applied to the metal substrate layer by a scraping, rolling, or sintering process.

3. The repair method for rapidly repairing bearing surfaces as described in claim 1, characterized in that: In order to make the repair material liquid before use, it is necessary to heat the repair material to a temperature of 60℃~80℃.

4. The repair method for rapidly repairing bearing surfaces as described in claim 1, characterized in that: The curing equipment can be a point light source photocuring device.

5. The repair method for rapidly repairing bearing surfaces as described in claim 1, characterized in that: In step STEP 103, the formulation and weight percentage of the base coating are 80-90% THEICTA, 10-20% coupling agent, and 1-10% curing agent. The formulation and weight percentage of the wear-resistant layer are 70-80% THEICTA, 10-20% reinforcing material, 10-20% friction-reducing material, and 1-10% curing agent.

6. The repair method for rapidly repairing bearing surfaces as described in claim 5, characterized in that: After the base coat and wear-resistant layer are applied, the base coat and wear-resistant layer are subjected to low-power, long-time photocuring. The photocuring parameters are 300 mw / cm2 and the time is 30 s.

7. The repair method for rapidly repairing bearing surfaces as described in claim 1, characterized in that: In step STEP 104, the formulation and weight percentage content of the primer layer are 80-90% THEICTA, 10-20% coupling agent, and 1-10% curing agent. The formulation and weight percentage content of the wear-resistant layer are 80-90% THEICTA, 5-8% reinforcing material, 10-15% lubricating material, and 1-5% curing agent.

8. The repair method for rapidly repairing bearing surfaces as described in claim 1, characterized in that: After the base coat and wear-resistant layer are applied, the base coat and wear-resistant layer are subjected to high-power short-time photocuring with curing parameters of 500mw / cm2 and curing time of 15s.

9. The repair method for rapidly repairing bearing surfaces as described in claim 1, characterized in that: In step STEP 105, the formulation and weight percentage content of the primer layer are 80-90% THEICTA, 10-20% coupling agent, and 1-10% curing agent. The formulation and weight percentage content of the reinforcing layer are 70-80% THEICTA, 10-20% reinforcing material, 10-20% lubricating material, and 1-10% curing agent. The formulation and weight percentage content of the friction-reducing lubricating layer are: THEICTA 70-80%, reinforcing material 1-5%, lubricating material 25-30%, and curing agent 1-5%.

10. The repair method for rapidly repairing bearing surfaces as described in claim 1, characterized in that: After the base coat, reinforcement layer, and friction-reducing lubricating layer are coated, the base coat, reinforcement layer, and friction-reducing lubricating layer are respectively subjected to high-power short-time photocuring. The photocuring parameters are 500mw / cm2, and the curing time is about 15s.