High-performance herringbone synchronous belt and preparation process thereof

Abstract

The application discloses a kind of high-performance herringbone synchronous belt and its preparation process, it is related to synchronous belt technical field.Synchronous belt includes belt body base material, tensile layer and herringbone structure, herringbone tooth top is set groove, tooth surface is set wear-resistant mute composite layer;Belt body base material is compounded from hydrogenated nitrile rubber, polyurea elastomer, isocyanate compatible agent, vulcanizing agent, filler, coupling agent, antioxidant, zinc oxide nanowire, plasticizer, stearic acid, end vinyl fluorosilicone oil and other raw materials, and tensile layer is woven with aramid fiber or carbon fiber.The preparation process is sequentially raw material mixing, tensile layer pretreatment, moulding, microwave subsection vulcanization, trimming, plasma treatment, composite layer coating, infrared curing and post-treatment detection.The application improves the wear resistance, silence, anti-deviation and fatigue resistance of synchronous belt by formula optimization and subsection vulcanization, plasma treatment and other processes, adapts to high-end transmission scene, and has strong practicality.

Description

Technical Field

[0001] This invention relates to the field of synchronous belt technology, and in particular to a high-performance herringbone tooth synchronous belt and its manufacturing process. Background Technology

[0002] Herringbone tooth synchronous belts, with their symmetrical tooth structure, can effectively counteract the axial thrust generated when a single helical tooth synchronous belt is running, preventing the belt from deviating. At the same time, compared with straight tooth synchronous belts, they have a larger meshing contact area, higher transmission efficiency, and stronger load-bearing capacity, and are widely used in machine tools, automobiles, textile machinery, automation equipment and other fields.

[0003] Current herringbone tooth synchronous belts are mostly manufactured using a one-piece molding process, where the belt body and tooth shape are pressed together in a single molding process. After molding, only simple grinding and trimming are performed, without any targeted surface strengthening process design. This results in several performance shortcomings in the belt body. On the one hand, wear easily occurs during the meshing process between the tooth surface and the pulley. After long-term operation, the tooth profile accuracy decreases, leading to problems such as tooth surface peeling and tooth tip wear, significantly shortening the service life of the synchronous belt. On the other hand, the surface friction coefficient of the belt body is unstable, making it prone to slight deviation during high-speed operation. Furthermore, the noise generated by meshing impact is relatively high, failing to meet the quiet transmission requirements of high-end equipment.

[0004] Some existing technologies attempt to improve wear resistance by coating the surface of synchronous belts with wear-resistant coatings. However, these methods suffer from problems such as weak adhesion between the coating and the belt substrate, uneven coating thickness, and easy coating peeling during operation. This not only fails to provide reinforcement but also exacerbates wear on the pulleys and belt. Furthermore, in existing molding processes, improper control of mold temperature, pressure, and vulcanization parameters leads to insufficient internal density of the belt, resulting in micropores. These micropores easily cause stress concentration under load, leading to belt breakage, tooth root cracking, and other failures. Commercially available herringbone tooth synchronous belts generally fail to simultaneously meet multiple performance requirements, including wear resistance, anti-deviation, quiet operation, and long service life. Summary of the Invention

[0005] To address the problems of poor wear resistance, easy deviation, high noise, short service life, and weak bonding between the surface reinforcement layer and the substrate in the existing herringbone tooth synchronous belt manufacturing process, this invention provides a high-performance herringbone tooth synchronous belt and its manufacturing process. By optimizing the molding process parameters and designing a suitable surface composite treatment process, the various performance characteristics of the belt are synergistically improved, meeting the transmission requirements of high-end equipment.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a high-performance herringbone tooth synchronous belt, comprising a belt body substrate, a tensile layer embedded inside the belt body substrate, and a herringbone tooth structure formed on one side of the belt body substrate, wherein the tooth top of the herringbone tooth is provided with a groove; the tooth surface of the herringbone tooth is provided with a wear-resistant and noise-reducing composite layer; the belt body substrate is made of the following raw materials in parts by weight: 60-80 parts of hydrogenated nitrile rubber, 10-15 parts of polyurea elastomer, 0.8-1.5 parts of isocyanate compatibilizer, 3-5 parts of vulcanizing agent, 10-20 parts of filler, 1.5-2 parts of coupling agent, 2-3 parts of antioxidant, 3-5 parts of zinc oxide nanowires, 4-8 parts of plasticizer, 1-2 parts of stearic acid, and 4-6 parts of vinyl-terminated fluorosilicone oil.

[0007] Preferably, the hydrogenated nitrile rubber is Zetpol 0020 manufactured by Zeon Corporation of Japan.

[0008] Preferably, the polyurea elastomer is a thermoplastic aliphatic polyurea elastomer, and its source is not particularly required. In one embodiment of the present invention, the polyurea elastomer is made according to the method of thermoplastic aliphatic polyurea elastomer in Example 2 of CN106928430B.

[0009] Preferably, the isocyanate compatibilizer is MDI-100LL produced by Wanhua Chemical.

[0010] Preferably, the vulcanizing agent is a compound of dicumyl peroxide, benzoyl peroxide, and bis(25) in a mass ratio of (3-5):1:1.

[0011] Preferably, the filler is a compound of fluorinated graphene, carbon nanotubes and silica in a mass ratio of 0.1:(0.3-0.5):(3-5).

[0012] Preferably, the fluorinated graphene has a particle size D50 ≤ 20µm, a number of layers ≤ 15, and a fluorine content of 45-65wt.%, and is provided by Shandong Zhongshan Optoelectronic Materials Co., Ltd.; the carbon nanotubes are multi-walled carbon nanotubes with a diameter of 10-20nm, an inner diameter of 5-10nm, and a length of 10-30µm; and the silica has a particle size of 1500-2000 mesh.

[0013] Preferably, the coupling agent is at least one of silane coupling agent KH550, silane coupling agent KH560, and silane coupling agent KH570; the antioxidant is antioxidant 445; and the plasticizer is plasticizer DOS.

[0014] Preferably, the zinc oxide nanowires have a diameter of 50 nm, a length of 20 µm, and are of the ZnO-NW-50 type.

[0015] Preferably, the vinyl-terminated fluorosilicone oil is vinyl-terminated fluorosilicone oil TPD-FS8019.

[0016] Preferably, the tensile layer is woven from aramid fiber or carbon fiber with a weaving density of 20-30 fibers / cm and a tensile strength ≥2800MPa.

[0017] Another object of the present invention is to provide a manufacturing process for the high-performance herringbone tooth synchronous belt, comprising the following steps: Step S1, Raw Material Pretreatment and Mixing: Weigh each raw material according to the formula weight parts. First, put the hydrogenated nitrile rubber into a mixer and plasticize it for 15-20 minutes at a temperature of 80-90℃ and a speed of 40-50 r / min until the rubber texture is uniform. Then, add polyurea elastomer and isocyanate compatibilizer in sequence and continue mixing for 20-25 minutes to promote the compatibility of the base material components. Next, add coupling agent, zinc oxide nanowires, and vinyl-terminated fluorosilicone oil and mix at a constant temperature for 10-15 minutes to make the nanoparticles uniformly dispersed. Then, add filler, antioxidant, plasticizer, and stearic acid, cool to 70-75℃, and mix for 15-20 minutes. Finally, add vulcanizing agent and mix at low speed for 5-8 minutes at a speed of 20-30 r / min to avoid premature decomposition of vulcanizing agent. After mixing, discharge the rubber compound and pass it through a two-roll mill 3-5 times to obtain the base material. Step S2, Tensile layer pretreatment: Immerse the tensile layer woven from aramid fiber or carbon fiber in a silane coupling agent KH550 solution for 30-40 minutes. The silane coupling agent KH550 solution is prepared by mixing the coupling agent and anhydrous ethanol at a mass ratio of 1:10. After immersion, remove the tensile layer and dry it at 120-130℃ for 2-3 hours to remove moisture and allow the coupling agent to form a protective film on the surface of the tensile layer, thereby improving the bonding strength between the tensile layer and the substrate adhesive. Step S3, Compression Molding: Select a mold with a herringbone tooth structure. Apply a release agent to the inner surface of the mold beforehand. The release agent should be a silicone-based release agent, and the coating thickness should be controlled at 5-10 μm. First, lay the pre-treated tensile layer flat at the bottom of the mold. Then, evenly spread the base material on top of the tensile layer. The thickness of the base material should be 1-2 mm thicker than the thickness of the finished strip, leaving room for subsequent compression. Then, close the mold and place it in a hydraulic press. Control the pressure at 15-20 MPa, raise the temperature to 110-120℃, and preheat for 10-15 minutes to soften the base material and fill the mold cavity, completing the initial molding. Step S4, Microwave Segmented Vulcanization: The pre-formed belt and mold are fed into a microwave vulcanization machine. A segmented vulcanization process is used, completing the vulcanization in three stages to ensure uniform vulcanization and improve the density of the belt's internal structure: In the first stage, the microwave power is set to 300-400W, the temperature is controlled at 130-140℃, and vulcanization lasts 20-25 minutes. This stage mainly allows the vulcanizing agent in the rubber compound to react initially, forming a basic cross-linked structure. In the second stage, the microwave power is increased to 500-600W. The temperature is raised to 150-160℃ and vulcanized for 30-35 minutes to accelerate the cross-linking reaction and reduce the micropores inside the belt. In the third stage, the microwave power is reduced to 200-300W and the temperature is lowered to 120-130℃. The belt is then vulcanized for 15-20 minutes to eliminate internal stress and prevent deformation after cooling. After vulcanization, the mold is kept closed and allowed to cool naturally to room temperature. Then the mold is opened and the belt prototype is removed. At this point, the belt prototype has formed a complete herringbone tooth structure and tooth top grooves.

[0018] Step S5, Edge Trimming: The extracted belt body prototype is fed into the edge trimming equipment and precision grinding is used to remove excess rubber and burrs from the edges of the belt body. During the grinding process, the grinding speed is controlled at 10-15m / min, and the grinding accuracy is controlled within ±0.1mm to ensure that the belt body width is uniform and the herringbone teeth are regular, so as to avoid the edge burrs affecting the subsequent surface treatment and the transmission stability during use. After the edge trimming is completed, the belt body surface is blown with compressed air to remove the debris generated during grinding. Step S6, Plasma Treatment: The trimmed tape is fed into a plasma treatment device to perform plasma activation treatment on the tooth surface of the herringbone teeth, improving the surface roughness and surface activity, laying the foundation for the coating of the wear-resistant and noise-reducing composite layer; Treatment parameter control: A mixture of argon and oxygen is selected as the plasma gas source, with an argon to oxygen volume ratio of 3:1, a gas flow rate of 20-30 mL / min, a treatment power of 150-200 W, a treatment distance of 5-8 mm, and a treatment time of 10-15 min; After treatment, the tape is immediately removed; Step S7, Wear-resistant and noise-reducing composite layer coating: Prepare the wear-resistant and noise-reducing composite coating slurry, which is made from the following raw materials in parts by weight: 20-30 parts polytetrafluoroethylene micro powder, 15-20 parts epoxy resin, 5-8 parts curing agent, 3-5 parts graphite powder, 2-4 parts silica nanoparticles, 1-2 parts coupling agent KH560, and 30-40 parts anhydrous ethanol. Mix all raw materials evenly and ultrasonically disperse them for 20-30 minutes using an ultrasonic dispersion device with an ultrasonic power of 200-300W to ensure uniform dispersion of each component and obtain a uniform and fine coating slurry. Use a spraying process to evenly coat the coating slurry onto the plasma-treated herringbone tooth surface. The spraying pressure is 0.3-0.5MPa, the spraying distance is 15-20cm, and the coating thickness is controlled at 20-30μm to ensure no missed coating or dripping on the tooth surface. The coating should also be evenly coated inside the grooves at the tooth top. Step S8, Infrared Radiation Curing: The coated tape is fed into an infrared radiation curing device, employing a segmented curing process to prevent cracking and peeling of the coating due to rapid curing: In the first stage, the infrared radiation temperature is controlled at 80-90℃, and curing is carried out for 15-20 minutes, allowing the anhydrous ethanol in the coating slurry to evaporate slowly, avoiding the formation of bubbles due to excessive evaporation; In the second stage, the radiation temperature is increased to 120-130℃, and curing is carried out for 30-35 minutes, promoting the reaction between the epoxy resin and the curing agent, and ensuring a tight bond between the coating and the tooth surface; In the third stage, the temperature is lowered to 100-110℃, and the temperature is maintained for 10-15 minutes to further improve the degree of coating curing, enhance the coating's wear resistance, and improve its bonding stability with the substrate; After curing, the tape is removed and allowed to cool naturally to room temperature. At this point, the wear-resistant and noise-reducing composite layer is firmly bonded to the tooth surface, and the coating thickness is uniform. Step S9, Post-processing and Inspection: The cured belt body is post-processed. First, it is dried at 100-110℃ for 1-2 hours to remove residual moisture and volatiles. Then, the belt body is comprehensively inspected using precision testing equipment. The qualified belt body is cut to obtain the finished high-performance herringbone tooth synchronous belt. The unqualified belt body is reworked until it passes the inspection.

[0019] Preferably, the polytetrafluoroethylene micro powder in step S7 is of the grade TPD-503S and is provided by Fuzhou Taipuda New Materials Co., Ltd.

[0020] Preferably, the epoxy resin is epoxy resin E-51; the curing agent is amine curing agent T31; the graphite powder is F-1 graphite powder produced by Qingdao Huatai, with an average particle size of 1000 mesh; and the silica nanoparticles have an average particle size of 10-70 nm.

[0021] Due to the application of the above technical solution, the present invention has the following beneficial effects: (1) The high-performance herringbone tooth synchronous belt and its preparation process disclosed in this invention optimizes the formulation of the belt substrate, introduces polyurea elastomer and isocyanate compatibilizer, and combines it with composite fillers such as fluorinated graphene and carbon nanotubes and zinc oxide nanowires to synergistically improve the strength, wear resistance and anti-aging performance of the substrate; the addition of vinyl fluorosilicone oil can adjust the surface friction coefficient of the substrate, and combined with the herringbone tooth structure and tooth top groove, further optimizes the anti-deviation performance and reduces meshing impact noise.

[0022] (2) The high-performance herringbone tooth synchronous belt and its preparation process disclosed in this invention, through the synergistic effect of microwave segmented vulcanization and plasma activation, completely solves the industry pain point of weak bonding of the surface reinforcement layer, and produces bonding stability exceeding expectations. Microwave segmented vulcanization precisely controls the cross-linking reaction process, significantly improving the internal density of the belt body and eliminating internal stress, laying a structural foundation for the bonding of the composite layer; plasma activation specifically improves the activity and roughness of the tooth surface, and with the appropriate composite layer formula, the bonding strength between the wear-resistant and noise-reducing composite layer and the tooth surface is significantly improved compared with the traditional coating process, completely avoiding coating peeling, while improving the uniformity of the composite layer thickness, taking into account both wear resistance and noise reduction.

[0023] (3) The high-performance herringbone tooth synchronous belt and its manufacturing process disclosed in this invention feature a tooth top groove design and a composite layer coating that work together to optimize transmission stability and noise reduction. The tooth top groove can store a small amount of lubricating medium, which, combined with the lubricating effect of polytetrafluoroethylene micro powder and graphite powder in the composite layer, significantly reduces the meshing friction coefficient. This not only reduces tooth surface wear but also reduces noise during high-speed operation, meeting the noise reduction requirements of high-end equipment. At the same time, the groove structure can buffer meshing impact and reduce belt vibration. Combined with the structural stability of the substrate, it effectively suppresses slight deviation during high-speed operation. The transmission accuracy is significantly improved compared to existing products, breaking through the bottleneck of traditional herringbone tooth synchronous belts that cannot simultaneously achieve both noise reduction and anti-deviation.

[0024] (4) The high-performance herringbone tooth synchronous belt and its preparation process disclosed in this invention have a tensile layer pretreated with a coupling agent, which improves the bonding stability with the substrate. Combined with the high strength characteristics of the substrate itself, it can effectively resist the tensile force during transmission, reduce failure problems such as belt breakage and tooth root cracking, and extend the service life of the synchronous belt. The optimization of process parameters throughout the entire process forms a synergistic effect, which effectively extends the service life of the belt and improves its adaptability. From the precise control of temperature and speed of raw material mixing, to the tensile layer pretreatment to improve the bonding strength with the substrate, and then to the segmented vulcanization and curing process to avoid structural defects, the optimization of the entire process makes the overall mechanical properties of the belt balanced, and the tensile strength and wear resistance are improved simultaneously. The finished synchronous belt takes into account wear resistance, anti-deviation, quietness and high load-bearing capacity, which can meet the high-end transmission needs of machine tools, high-end automated equipment and other fields. Detailed Implementation

[0025] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. Example 1

[0026] A high-performance herringbone tooth synchronous belt includes a belt body substrate, a tensile layer embedded inside the belt body substrate, and a herringbone tooth structure formed on one side of the belt body substrate. The tooth top of the herringbone tooth is provided with a groove; the tooth surface of the herringbone tooth is provided with a wear-resistant and noise-reducing composite layer; the belt body substrate is made of the following raw materials in parts by weight: 60 parts hydrogenated nitrile rubber, 10 parts polyurea elastomer, 0.8 parts isocyanate compatibilizer, 3 parts vulcanizing agent, 10 parts filler, 1.5 parts coupling agent, 2 parts antioxidant, 3 parts zinc oxide nanowires, 4 parts plasticizer, 1 part stearic acid, and 4 parts vinyl-terminated fluorosilicone oil.

[0027] The hydrogenated nitrile butadiene rubber is Zetpol 0020 manufactured by Zeon Corporation of Japan; the polyurea elastomer is prepared according to the method for thermoplastic aliphatic polyurea elastomers in Example 2 of CN106928430B; the isocyanate compatibilizer is MDI-100LL manufactured by Wanhua Chemical; the vulcanizing agent is a compound of dicumyl peroxide, benzoyl peroxide, and bis(25) in a mass ratio of 3:1:1; the filler is a compound of fluorinated graphene, carbon nanotubes, and silica in a mass ratio of 0.1:0.3:3; the fluorinated graphene has a particle size D50 ≤ 20µm, a layer number ≤ 15, and a fluorine content of 45-65wt.%, and is provided by Shandong Zhongshan Optoelectronic Materials Co., Ltd. The carbon nanotubes are multi-walled carbon nanotubes with a diameter of 10-20 nm, an inner diameter of 5-10 nm, and a length of 10-30 µm; the silica has a particle size of 1500 mesh; the coupling agent is silane coupling agent KH550; the antioxidant is antioxidant 445; the plasticizer is plasticizer DOS; the zinc oxide nanowires have a diameter of 50 nm, a length of 20 µm, and are of type ZnO-NW-50; the vinyl-terminated fluorosilicone oil is vinyl-terminated fluorosilicone oil TPD-FS8019; the tensile layer is woven from aramid fibers with a weaving density of 20 fibers / cm and a tensile strength ≥2800 MPa.

[0028] A manufacturing process for the high-performance herringbone tooth synchronous belt includes the following steps: Step S1, Raw Material Pretreatment and Mixing: Weigh each raw material according to the formula weight parts. First, put the hydrogenated nitrile rubber into the internal mixer and plasticize it for 15 minutes at 80℃ and 40r / min until the rubber texture is uniform. Then, add the polyurea elastomer and isocyanate compatibilizer in sequence and continue mixing for 20 minutes to promote the compatibility of the base material components. Then, add the coupling agent, zinc oxide nanowires, and vinyl-terminated fluorosilicone oil and mix at a constant temperature for 10 minutes to make the nanoparticles uniformly dispersed. Next, add the filler, antioxidant, plasticizer, and stearic acid, cool to 70℃, and mix for 15 minutes. Finally, add the vulcanizing agent and mix at a low speed for 5 minutes at a speed controlled at 20r / min to avoid premature decomposition of the vulcanizing agent. After mixing, discharge the rubber compound and place it in a two-roll mill for thin passing 3 times, with the thickness controlled at 2mm, to obtain the base material. Step S2, Tensile layer pretreatment: Immerse the tensile layer woven from aramid fiber or carbon fiber in a silane coupling agent KH550 solution at a bath ratio of 1:10 (mass ratio) for 30 minutes. The silane coupling agent KH550 solution is prepared by mixing the coupling agent and anhydrous ethanol at a mass ratio of 1:10. After immersion, remove the layer and dry it at 120℃ for 2 hours to remove moisture and allow the coupling agent to form a protective film on the surface of the tensile layer, thereby improving the bonding strength between the tensile layer and the substrate adhesive. Step S3, Compression Molding: Select a mold with a herringbone tooth structure. Apply a release agent to the inner surface of the mold beforehand. The release agent should be a silicone-based release agent, and the coating thickness should be controlled at 5μm. First, lay the pre-treated tensile layer flat at the bottom of the mold. Then, evenly spread the base material on top of the tensile layer. The thickness of the base material should be 1mm thicker than the thickness of the finished strip, leaving room for subsequent compression. Then, close the mold and place it in a hydraulic press. Control the pressure at 15MPa, raise the temperature to 110℃, and preheat for 10 minutes to soften the base material and fill the mold cavity, completing the initial molding. Step S4, Microwave Segmented Vulcanization: The pre-formed belt and mold are fed into a microwave vulcanization device. A segmented vulcanization process is adopted, and vulcanization is completed in three stages to ensure uniform vulcanization and improve the density of the belt's internal structure: In the first stage, the microwave power is set to 300W, the temperature is controlled at 130℃, and vulcanization is carried out for 20 minutes. This stage mainly allows the vulcanizing agent in the rubber compound to react initially and form a basic cross-linked structure. In the second stage, the microwave power is increased to 500W, the temperature is raised to 150℃, and vulcanization is carried out for 30 minutes to accelerate the cross-linking reaction and reduce the micropores inside the belt. In the third stage, the microwave power is reduced to 200W, the temperature is lowered to 120℃, and vulcanization is carried out at this temperature for 15 minutes to eliminate internal stress and prevent deformation of the belt after cooling. After vulcanization is completed, the mold is kept closed and allowed to cool naturally to room temperature. Then the mold is opened, and the belt prototype is taken out. At this time, the belt prototype has formed a complete herringbone tooth structure and tooth top grooves.

[0029] Step S5, Edge Trimming: The extracted belt body prototype is fed into the edge trimming equipment. A precision grinding process is used to remove excess rubber and burrs from the edges of the belt body. During the grinding process, the grinding speed is controlled at 10m / min, and the grinding accuracy is controlled within ±0.1mm to ensure that the belt body width is uniform and the herringbone teeth are regular. This avoids edge burrs from affecting subsequent surface treatment and transmission stability during use. After the edge trimming is completed, compressed air is used to blow away the belt body surface to remove the debris generated during grinding. Step S6, Plasma Treatment: The trimmed tape is fed into a plasma treatment device to perform plasma activation treatment on the tooth surface of the herringbone teeth, improving the surface roughness and surface activity, laying the foundation for the coating of the wear-resistant and noise-reducing composite layer; Treatment parameter control: A mixture of argon and oxygen is selected as the plasma gas source, with an argon to oxygen volume ratio of 3:1, a gas flow rate of 20 mL / min, a treatment power of 150 W, a treatment distance of 5 mm, and a treatment time of 10 min; After treatment, the tape is immediately removed; Step S7, Wear-resistant and noise-reducing composite layer coating: Prepare the wear-resistant and noise-reducing composite coating slurry, which is made from the following raw materials in parts by weight: 20 parts polytetrafluoroethylene micro powder, 15 parts epoxy resin, 5 parts curing agent, 3 parts graphite powder, 2 parts silica nanoparticles, 1 part coupling agent KH560, and 30 parts anhydrous ethanol. Mix all raw materials evenly and ultrasonically disperse them for 20 minutes using an ultrasonic dispersion device with an ultrasonic power of 200W to ensure uniform dispersion of each component and obtain a uniform and fine coating slurry. Use a spraying process to evenly coat the coating slurry onto the plasma-treated herringbone tooth surface. The spraying pressure is 0.3MPa, the spraying distance is 15cm, and the coating thickness is controlled at 20μm to ensure no missed coating or dripping on the tooth surface. The coating should also be evenly coated inside the groove at the tooth tip. Step S8, Infrared Radiation Curing: The coated tape is fed into an infrared radiation curing device. A segmented curing process is used to prevent cracking and peeling of the coating due to rapid curing: In the first stage, the infrared radiation temperature is controlled at 80℃ and cured for 15 minutes to allow the anhydrous ethanol in the coating slurry to evaporate slowly, avoiding the formation of bubbles due to excessive evaporation; In the second stage, the radiation temperature is increased to 120℃ and cured for 30 minutes to promote the reaction between the epoxy resin and the curing agent, making the coating tightly bonded to the tooth surface; In the third stage, the temperature is lowered to 100℃ and kept at that temperature for 10 minutes to further improve the curing degree of the coating, enhance the wear resistance of the coating and the bonding stability with the substrate; After curing, the tape is removed and allowed to cool naturally to room temperature. At this point, the wear-resistant and noise-reducing composite layer is firmly bonded to the tooth surface, and the coating thickness is uniform. Step S9, Post-processing and Inspection: The cured belt body is post-processed by first drying it at 100℃ for 1 hour to remove residual moisture and volatiles. Then, the belt body is comprehensively inspected using precision testing equipment. The qualified belt body is cut to obtain the finished high-performance herringbone tooth synchronous belt. The unqualified belt body is reworked until it passes the inspection.

[0030] The polytetrafluoroethylene micro powder mentioned in step S7 is of the grade TPD-503S and is provided by Fuzhou Taipuda New Material Co., Ltd.; the epoxy resin is epoxy resin E-51; the curing agent is amine curing agent T31; the graphite powder is graphite powder of grade F-1 produced by Qingdao Huatai, with an average particle size of 1000 mesh; and the silica nanoparticles have an average particle size of 10 nm. Example 2

[0031] A high-performance herringbone synchronous belt includes a belt body substrate, a tensile layer embedded inside the belt body substrate, and a herringbone tooth structure formed on one side of the belt body substrate. The herringbone teeth have grooves on their tops and wear-resistant and noise-reducing composite layers on their surfaces. The belt body substrate is made of the following raw materials in parts by weight: 65 parts hydrogenated nitrile rubber, 11 parts polyurea elastomer, 1 part isocyanate compatibilizer, 3.5 parts vulcanizing agent, 13 parts filler, 1.7 parts coupling agent, 2.3 parts antioxidant, 3.5 parts zinc oxide nanowires, 5 parts plasticizer, 1.2 parts stearic acid, and 4.5 parts vinyl-terminated fluorosilicone oil.

[0032] The hydrogenated nitrile butadiene rubber is Zetpol 0020 manufactured by Zeon Corporation of Japan; the polyurea elastomer is prepared according to the method for thermoplastic aliphatic polyurea elastomers in Example 2 of CN106928430B; the isocyanate compatibilizer is MDI-100LL manufactured by Wanhua Chemical; the vulcanizing agent is a compound of dicumyl peroxide, benzoyl peroxide, and bis(25) in a mass ratio of 3.5:1:1; the filler is a compound of fluorinated graphene, carbon nanotubes, and silica in a mass ratio of 0.1:0.35:3.5; the fluorinated graphene has a particle size D50 ≤ 20µm, a layer number ≤ 15, and a fluorine content of 45-65wt.%, and is provided by Shandong Zhongshan Optoelectronic Materials Co., Ltd. The carbon nanotubes are multi-walled carbon nanotubes with a diameter of 10-20 nm, an inner diameter of 5-10 nm, and a length of 10-30 µm; the silica has a particle size of 1600 mesh; the coupling agent is silane coupling agent KH560; the antioxidant is antioxidant 445; the plasticizer is plasticizer DOS; the zinc oxide nanowires have a diameter of 50 nm, a length of 20 µm, and are of type ZnO-NW-50; the vinyl-terminated fluorosilicone oil is vinyl-terminated fluorosilicone oil TPD-FS8019; the tensile layer is made of woven carbon fiber with a weaving density of 23 strands / cm and a tensile strength ≥2800 MPa.

[0033] A manufacturing process for the high-performance herringbone tooth synchronous belt includes the following steps: Step S1, Raw Material Pretreatment and Mixing: Weigh each raw material according to the formula weight parts. First, put the hydrogenated nitrile rubber into the internal mixer and plasticize it for 17 minutes at a temperature of 83℃ and a speed of 43r / min until the rubber texture is uniform. Then, add the polyurea elastomer and isocyanate compatibilizer in sequence and continue mixing for 22 minutes to promote the compatibility of the base material components. Then add the coupling agent, zinc oxide nanowires, and vinyl-terminated fluorosilicone oil and mix at a constant temperature for 12 minutes to make the nanoparticles uniformly dispersed. Next, add the filler, antioxidant, plasticizer, and stearic acid, cool down to 72℃, and mix for 17 minutes. Finally, add the vulcanizing agent and mix at a low speed for 6 minutes at a speed of 23r / min to avoid premature decomposition of the vulcanizing agent. After mixing, discharge the rubber compound and place it in a two-roll mill for thin passing 4 times, with the thickness controlled at 2.3mm, to obtain the base material. Step S2, Tensile layer pretreatment: Immerse the tensile layer woven from aramid fiber or carbon fiber in a silane coupling agent KH550 solution at a bath ratio of 1:10 (mass ratio) for 33 minutes. The silane coupling agent KH550 solution is prepared by mixing the coupling agent and anhydrous ethanol at a mass ratio of 1:10. After immersion, remove the layer and dry it at 123℃ for 2.3 hours to remove moisture and allow the coupling agent to form a protective film on the surface of the tensile layer, thereby improving the bonding strength between the tensile layer and the substrate adhesive. Step S3, Compression Molding: Select a mold with a herringbone tooth structure. Apply a release agent to the inner surface of the mold beforehand. The release agent should be a silicone-based release agent, and the coating thickness should be controlled at 6μm. First, lay the pre-treated tensile layer flat at the bottom of the mold. Then, evenly spread the base material on top of the tensile layer. The thickness of the base material should be 1.2mm thicker than the thickness of the finished strip, leaving room for subsequent compression. Then, close the mold and place it in a hydraulic press. Control the pressure at 17MPa, raise the temperature to 113℃, and preheat for 12 minutes to soften the base material and fill the mold cavity, completing the initial molding. Step S4, Microwave Segmented Vulcanization: The pre-formed belt and mold are fed into a microwave vulcanization device. A segmented vulcanization process is adopted, and vulcanization is completed in three stages to ensure uniform vulcanization and improve the density of the belt's internal structure: In the first stage, the microwave power is set to 330W, the temperature is controlled at 133℃, and vulcanization is carried out for 22 minutes. This stage mainly allows the vulcanizing agent in the rubber compound to react initially and form a basic cross-linked structure. In the second stage, the microwave power is increased to 520W, the temperature is raised to 153℃, and vulcanization is carried out for 32 minutes to accelerate the cross-linking reaction and reduce the micropores inside the belt. In the third stage, the microwave power is reduced to 230W, the temperature is lowered to 123℃, and vulcanization is carried out at this temperature for 17 minutes to eliminate internal stress and prevent deformation of the belt after cooling. After vulcanization is completed, the mold is kept closed and allowed to cool naturally to room temperature. Then the mold is opened and the belt prototype is taken out. At this time, the belt prototype has formed a complete herringbone tooth structure and tooth top grooves.

[0034] Step S5, Edge Trimming: The extracted belt body prototype is fed into the edge trimming equipment. A precision grinding process is used to remove excess rubber and burrs from the edges of the belt body. During the grinding process, the grinding speed is controlled at 12m / min, and the grinding accuracy is controlled within ±0.1mm to ensure that the belt body width is uniform and the herringbone teeth are regular. This avoids edge burrs from affecting subsequent surface treatment and transmission stability during use. After the edge trimming is completed, compressed air is used to blow away the belt body surface to remove the debris generated during grinding. Step S6, Plasma Treatment: The trimmed tape is fed into a plasma treatment device to perform plasma activation treatment on the tooth surface of the herringbone teeth, improving the surface roughness and surface activity, laying the foundation for the coating of the wear-resistant and noise-reducing composite layer; Treatment parameter control: A mixture of argon and oxygen is selected as the plasma gas source, with an argon to oxygen volume ratio of 3:1, a gas flow rate of 23 mL / min, a treatment power of 160 W, a treatment distance of 6 mm, and a treatment time of 12 min; After treatment, the tape is immediately removed; Step S7, Wear-resistant and noise-reducing composite layer coating: Prepare the wear-resistant and noise-reducing composite coating slurry, which is made from the following raw materials in parts by weight: 23 parts polytetrafluoroethylene micro powder, 17 parts epoxy resin, 6 parts curing agent, 3.5 parts graphite powder, 2.5 parts silica nanoparticles, 1.2 parts coupling agent KH560, and 33 parts anhydrous ethanol. Mix all raw materials evenly and ultrasonically disperse them for 23 minutes using an ultrasonic dispersion device with an ultrasonic power of 240W to ensure uniform dispersion of each component and obtain a uniform and fine coating slurry. Use a spraying process to evenly coat the coating slurry onto the plasma-treated herringbone tooth surface. The spraying pressure is 0.35MPa, the spraying distance is 17cm, and the coating thickness is controlled at 23μm to ensure no missed coating or dripping on the tooth surface. The coating should also be evenly coated inside the grooves at the tooth top. Step S8, Infrared Radiation Curing: The coated tape is fed into an infrared radiation curing device, employing a segmented curing process to prevent cracking and peeling of the coating due to rapid curing: In the first stage, the infrared radiation temperature is controlled at 83℃ and cured for 17 minutes, allowing the anhydrous ethanol in the coating slurry to evaporate slowly, avoiding the formation of bubbles due to excessive evaporation; In the second stage, the radiation temperature is increased to 123℃ and cured for 32 minutes, promoting the reaction between the epoxy resin and the curing agent, ensuring a tight bond between the coating and the tooth surface; In the third stage, the temperature is lowered to 103℃ and maintained for 13 minutes to further improve the coating's curing degree, enhancing its wear resistance and bonding stability with the substrate; After curing, the tape is removed and allowed to cool naturally to room temperature. At this point, the wear-resistant and noise-reducing composite layer is firmly bonded to the tooth surface, and the coating thickness is uniform. Step S9, Post-processing and Inspection: The cured belt is post-processed by first drying it at 103℃ for 1.2 hours to remove residual moisture and volatiles. Then, the belt is fully inspected using precision testing equipment. Belts that pass the inspection are cut to obtain finished high-performance herringbone tooth synchronous belts. Belts that fail the inspection are reworked until they pass the inspection.

[0035] The polytetrafluoroethylene micro powder mentioned in step S7 is of the grade TPD-503S and is provided by Fuzhou Taipuda New Material Co., Ltd.; the epoxy resin is epoxy resin E-51; the curing agent is amine curing agent T31; the graphite powder is graphite powder of grade F-1 produced by Qingdao Huatai, with an average particle size of 1000 mesh; and the silica nanoparticles have an average particle size of 30 nm. Example 3

[0036] A high-performance herringbone synchronous belt includes a belt body substrate, a tensile layer embedded inside the belt body substrate, and a herringbone tooth structure formed on one side of the belt body substrate. The herringbone teeth have grooves on their tops. The tooth surfaces of the herringbone teeth have wear-resistant and noise-reducing composite layers. The belt body substrate is made of the following raw materials in parts by weight: 70 parts hydrogenated nitrile rubber, 13 parts polyurea elastomer, 1.2 parts isocyanate compatibilizer, 4 parts vulcanizing agent, 15 parts filler, 1.8 parts coupling agent, 2.5 parts antioxidant, 4 parts zinc oxide nanowires, 6 parts plasticizer, 1.5 parts stearic acid, and 5 parts vinyl-terminated fluorosilicone oil.

[0037] The hydrogenated nitrile butadiene rubber is Zetpol 0020 manufactured by Zeon Corporation of Japan; the polyurea elastomer is prepared according to the method for thermoplastic aliphatic polyurea elastomers in Example 2 of CN106928430B; the isocyanate compatibilizer is MDI-100LL manufactured by Wanhua Chemical; the vulcanizing agent is a compound of dicumyl peroxide, benzoyl peroxide, and bis(25) in a mass ratio of 4:1:1; the filler is a compound of fluorinated graphene, carbon nanotubes, and silica in a mass ratio of 0.1:0.4:4; the fluorinated graphene has a particle size D50 ≤ 20µm, a layer number ≤ 15, and a fluorine content of 45-65wt.%, and is provided by Shandong Zhongshan Optoelectronic Materials Co., Ltd. The carbon nanotubes are multi-walled carbon nanotubes with a diameter of 10-20 nm, an inner diameter of 5-10 nm, and a length of 10-30 µm; the silica has a particle size of 1800 mesh; the coupling agent is silane coupling agent KH570; the antioxidant is antioxidant 445; the plasticizer is plasticizer DOS; the zinc oxide nanowires have a diameter of 50 nm, a length of 20 µm, and are of type ZnO-NW-50; the vinyl-terminated fluorosilicone oil is vinyl-terminated fluorosilicone oil TPD-FS8019; the tensile layer is woven from aramid fibers with a weaving density of 25 fibers / cm and a tensile strength ≥2800 MPa.

[0038] A manufacturing process for the high-performance herringbone tooth synchronous belt includes the following steps: Step S1, Raw Material Pretreatment and Mixing: Weigh each raw material according to the formula weight parts. First, put the hydrogenated nitrile rubber into the internal mixer and plasticize it for 18 minutes at a temperature of 85℃ and a speed of 45r / min until the rubber texture is uniform. Then, add the polyurea elastomer and isocyanate compatibilizer in sequence and continue mixing for 23 minutes to promote the compatibility of the base material components. Then add the coupling agent, zinc oxide nanowires, and vinyl-terminated fluorosilicone oil and mix at a constant temperature for 13 minutes to make the nanoparticles uniformly dispersed. Next, add the filler, antioxidant, plasticizer, and stearic acid, cool down to 73℃, and mix for 18 minutes. Finally, add the vulcanizing agent and mix at a low speed for 6.5 minutes at a speed controlled at 25r / min to avoid premature decomposition of the vulcanizing agent. After mixing, discharge the rubber compound and place it in a two-roll mill for thin passing 4 times, with the thickness controlled at 2.5mm, to obtain the base material. Step S2, Tensile layer pretreatment: Immerse the tensile layer woven from aramid fiber or carbon fiber in a silane coupling agent KH550 solution at a bath ratio of 1:10 (mass ratio) for 35 minutes. The silane coupling agent KH550 solution is prepared by mixing the coupling agent and anhydrous ethanol at a mass ratio of 1:10. After immersion, remove the layer and dry it at 125℃ for 2.5 hours to remove moisture and allow the coupling agent to form a protective film on the surface of the tensile layer, thereby improving the bonding strength between the tensile layer and the substrate adhesive. Step S3, Compression Molding: Select a mold with a herringbone tooth structure. Apply a release agent to the inner surface of the mold beforehand. The release agent should be a silicone-based release agent, and the coating thickness should be controlled at 8μm. First, lay the pre-treated tensile layer flat at the bottom of the mold. Then, evenly spread the base material on top of the tensile layer. The thickness of the base material should be 1.5mm thicker than the thickness of the finished strip, leaving room for subsequent compression. Then, close the mold and place it in a hydraulic press. Control the pressure at 18MPa, raise the temperature to 115℃, and preheat for 13 minutes to soften the base material and fill the mold cavity, completing the initial molding. Step S4, Microwave Segmented Vulcanization: The pre-formed belt and mold are fed into a microwave vulcanization device. A segmented vulcanization process is adopted, and vulcanization is completed in three stages to ensure uniform vulcanization and improve the density of the belt's internal structure: In the first stage, the microwave power is set to 350W, the temperature is controlled at 135℃, and vulcanization is carried out for 23 minutes. This stage mainly allows the vulcanizing agent in the rubber compound to react initially and form a basic cross-linked structure. In the second stage, the microwave power is increased to 550W, the temperature is raised to 155℃, and vulcanization is carried out for 33 minutes to accelerate the cross-linking reaction and reduce the micropores inside the belt. In the third stage, the microwave power is reduced to 250W, the temperature is lowered to 125℃, and vulcanization is carried out at this temperature for 18 minutes to eliminate internal stress and prevent deformation of the belt after cooling. After vulcanization is completed, the mold is kept closed and allowed to cool naturally to room temperature. Then the mold is opened and the belt prototype is taken out. At this time, the belt prototype has formed a complete herringbone tooth structure and tooth top grooves.

[0039] Step S5, Edge Trimming: The extracted belt body prototype is fed into the edge trimming equipment and precision grinding is used to remove excess rubber and burrs from the edges of the belt body. During the grinding process, the grinding speed is controlled at 13m / min and the grinding accuracy is controlled within ±0.1mm to ensure that the belt body width is uniform and the herringbone teeth are regular, so as to avoid the edge burrs affecting the subsequent surface treatment and the transmission stability during use. After the edge trimming is completed, the belt body surface is blown with compressed air to remove the debris generated during grinding. Step S6, Plasma Treatment: The trimmed tape is fed into a plasma treatment device to perform plasma activation treatment on the tooth surface of the herringbone teeth, improving the surface roughness and surface activity, laying the foundation for the coating of the wear-resistant and noise-reducing composite layer; Treatment parameter control: A mixture of argon and oxygen is selected as the plasma gas source, with an argon to oxygen volume ratio of 3:1, a gas flow rate of 25 mL / min, a treatment power of 180 W, a treatment distance of 6.5 mm, and a treatment time of 13 min; After treatment, the tape is immediately removed; Step S7, Wear-resistant and noise-reducing composite layer coating: Prepare the wear-resistant and noise-reducing composite coating slurry, which is made from the following raw materials in parts by weight: 25 parts polytetrafluoroethylene micro powder, 18 parts epoxy resin, 6.5 parts curing agent, 4 parts graphite powder, 3 parts silica nanoparticles, 1.5 parts coupling agent KH560, and 35 parts anhydrous ethanol. Mix all raw materials evenly and ultrasonically disperse them for 25 minutes using an ultrasonic dispersion device with an ultrasonic power of 250W to ensure uniform dispersion of each component and obtain a uniform and fine coating slurry. Use a spraying process to evenly coat the coating slurry onto the plasma-treated herringbone tooth surface. The spraying pressure is 0.4MPa, the spraying distance is 18cm, and the coating thickness is controlled at 25μm to ensure no missed coating or dripping on the tooth surface. The coating should also be evenly coated inside the grooves at the tooth top. Step S8, Infrared Radiation Curing: The coated tape is fed into an infrared radiation curing device, employing a segmented curing process to prevent cracking and peeling of the coating due to rapid curing: In the first stage, the infrared radiation temperature is controlled at 85℃ and cured for 18 minutes, allowing the anhydrous ethanol in the coating slurry to evaporate slowly, avoiding the formation of bubbles due to excessive evaporation; In the second stage, the radiation temperature is increased to 125℃ and cured for 33 minutes, promoting the reaction between the epoxy resin and the curing agent, ensuring a tight bond between the coating and the tooth surface; In the third stage, the temperature is lowered to 105℃ and maintained for 13 minutes to further improve the coating's curing degree, enhancing its wear resistance and bonding stability with the substrate; After curing, the tape is removed and allowed to cool naturally to room temperature. At this point, the wear-resistant and noise-reducing composite layer is firmly bonded to the tooth surface, and the coating thickness is uniform. Step S9, Post-processing and Inspection: The cured belt body is post-processed by first drying it at 105℃ for 1.5 hours to remove residual moisture and volatiles. Then, the belt body is comprehensively inspected using precision testing equipment. The qualified belt body is cut to obtain the finished high-performance herringbone tooth synchronous belt. The unqualified belt body is reworked until it passes the inspection.

[0040] The polytetrafluoroethylene micro powder mentioned in step S7 is of the grade TPD-503S and is provided by Fuzhou Taipuda New Material Co., Ltd.; the epoxy resin is epoxy resin E-51; the curing agent is amine curing agent T31; the graphite powder is graphite powder of grade F-1 produced by Qingdao Huatai, with an average particle size of 1000 mesh; and the silica nanoparticles have an average particle size of 40 nm. Example 4

[0041] A high-performance herringbone synchronous belt includes a belt body substrate, a tensile layer embedded inside the belt body substrate, and a herringbone tooth structure formed on one side of the belt body substrate. The herringbone teeth have grooves on their tops and wear-resistant and noise-reducing composite layers on their surfaces. The belt body substrate is made of the following raw materials in parts by weight: 75 parts hydrogenated nitrile rubber, 14 parts polyurea elastomer, 1.3 parts isocyanate compatibilizer, 4.5 parts vulcanizing agent, 18 parts filler, 1.8 parts coupling agent, 2.8 parts antioxidant, 4.5 parts zinc oxide nanowires, 7.5 parts plasticizer, 1.8 parts stearic acid, and 5.5 parts vinyl-terminated fluorosilicone oil.

[0042] The hydrogenated nitrile butadiene rubber is Zetpol 0020 manufactured by Zeon Corporation of Japan; the polyurea elastomer is prepared according to the method for thermoplastic aliphatic polyurea elastomers in Example 2 of CN106928430B; the isocyanate compatibilizer is MDI-100LL manufactured by Wanhua Chemical; the vulcanizing agent is a compound of dicumyl peroxide, benzoyl peroxide, and bis(25) in a mass ratio of 4.5:1:1; the filler is a compound of fluorinated graphene, carbon nanotubes, and silica in a mass ratio of 0.1:0.4:4.5; the fluorinated graphene has a particle size D50 ≤ 20µm, a layer number ≤ 15, and a fluorine content of 45-65wt.%, and is provided by Shandong Zhongshan Optoelectronic Materials Co., Ltd.; the carbon nanotubes are multi-walled carbon nanotubes with a diameter of The particle size of the silica is 10-20 nm, the inner diameter is 5-10 nm, and the length is 10-30 µm; the particle size of the silica is 1900 mesh; the coupling agent is a compound of silane coupling agent KH550, silane coupling agent KH560, and silane coupling agent KH570 in a mass ratio of 1:2:1; the antioxidant is antioxidant 445; the plasticizer is plasticizer DOS; the zinc oxide nanowires have a diameter of 50 nm, a length of 20 µm, and are of type ZnO-NW-50; the terminal vinyl fluorosilicone oil is terminal vinyl fluorosilicone oil TPD-FS8019; the tensile layer is made of carbon fiber weaving with a weaving density of 28 fibers / cm and a tensile strength ≥2800 MPa.

[0043] A manufacturing process for the high-performance herringbone tooth synchronous belt includes the following steps: Step S1, Raw Material Pretreatment and Mixing: Weigh each raw material according to the formula weight parts. First, put the hydrogenated nitrile rubber into the internal mixer and plasticize it for 19 minutes at a temperature of 88℃ and a speed of 48r / min until the rubber texture is uniform. Then, add the polyurea elastomer and isocyanate compatibilizer in sequence and continue mixing for 24 minutes to promote the compatibility of the base material components. Then add the coupling agent, zinc oxide nanowires, and vinyl-terminated fluorosilicone oil and mix at a constant temperature for 14 minutes to make the nanoparticles uniformly dispersed. Next, add the filler, antioxidant, plasticizer, and stearic acid, cool down to 74℃, and mix for 19 minutes. Finally, add the vulcanizing agent and mix at a low speed for 7.5 minutes at a speed controlled at 28r / min to avoid premature decomposition of the vulcanizing agent. After mixing, discharge the rubber compound and place it in a two-roll mill for thin passing 5 times, with the thickness controlled at 2.8mm, to obtain the base material. Step S2, Tensile layer pretreatment: Immerse the tensile layer woven from aramid fiber or carbon fiber in a silane coupling agent KH550 solution at a bath ratio of 1:10 (mass ratio) for 38 minutes. The silane coupling agent KH550 solution is prepared by mixing the coupling agent and anhydrous ethanol at a mass ratio of 1:10. After immersion, remove the layer and dry it at 128℃ for 2.8 hours to remove moisture and allow the coupling agent to form a protective film on the surface of the tensile layer, thereby improving the bonding strength between the tensile layer and the substrate adhesive. Step S3, Compression Molding: Select a mold with a herringbone tooth structure. Apply a release agent to the inner surface of the mold beforehand. The release agent should be a silicone-based release agent, and the coating thickness should be controlled at 9μm. First, lay the pre-treated tensile layer flat at the bottom of the mold. Then, evenly spread the base material on top of the tensile layer. The thickness of the base material should be 1.8mm thicker than the thickness of the finished strip, leaving room for subsequent compression. Then, close the mold and place it in a hydraulic press. Control the pressure at 19MPa, raise the temperature to 118℃, and preheat for 14 minutes to soften the base material and fill the mold cavity, completing the initial molding. Step S4, Microwave Segmented Vulcanization: The pre-formed belt and mold are fed into a microwave vulcanization device. A segmented vulcanization process is adopted, and vulcanization is completed in three stages to ensure uniform vulcanization and improve the density of the belt's internal structure: In the first stage, the microwave power is set to 380W, the temperature is controlled at 138℃, and vulcanization is carried out for 24 minutes. This stage mainly allows the vulcanizing agent in the rubber compound to react initially and form a basic cross-linked structure. In the second stage, the microwave power is increased to 580W, the temperature is raised to 158℃, and vulcanization is carried out for 34 minutes to accelerate the cross-linking reaction and reduce the micropores inside the belt. In the third stage, the microwave power is reduced to 280W, the temperature is lowered to 128℃, and vulcanization is carried out at this temperature for 19 minutes to eliminate internal stress and prevent deformation of the belt after cooling. After vulcanization is completed, the mold is kept closed and allowed to cool naturally to room temperature. Then the mold is opened and the belt prototype is taken out. At this time, the belt prototype has formed a complete herringbone tooth structure and tooth top grooves.

[0044] Step S5, Edge Trimming: The extracted belt body prototype is fed into the edge trimming equipment. A precision grinding process is used to remove excess rubber and burrs from the edges of the belt body. During the grinding process, the grinding speed is controlled at 14m / min, and the grinding accuracy is controlled within ±0.1mm to ensure that the belt body width is uniform and the herringbone teeth are regular, so as to avoid the edge burrs affecting the subsequent surface treatment and the transmission stability during use. After the edge trimming is completed, the belt body surface is blown with compressed air to remove the debris generated during grinding. Step S6, Plasma Treatment: The trimmed tape is fed into a plasma treatment device to perform plasma activation treatment on the tooth surface of the herringbone teeth, improving the surface roughness and surface activity, laying the foundation for the coating of the wear-resistant and noise-reducing composite layer; Treatment parameter control: A mixture of argon and oxygen is selected as the plasma gas source, with an argon to oxygen volume ratio of 3:1, a gas flow rate of 28 mL / min, a treatment power of 190 W, a treatment distance of 7.5 mm, and a treatment time of 14 min; After treatment, the tape is immediately removed; Step S7, Wear-resistant and noise-reducing composite layer coating: Prepare the wear-resistant and noise-reducing composite coating slurry, which is made from the following raw materials in parts by weight: 28 parts polytetrafluoroethylene micro powder, 19 parts epoxy resin, 7.5 parts curing agent, 4.5 parts graphite powder, 3.5 parts silica nanoparticles, 1.8 parts coupling agent KH560, and 38 parts anhydrous ethanol. Mix all raw materials evenly and ultrasonically disperse them for 28 minutes using an ultrasonic dispersion device with an ultrasonic power of 290W to ensure uniform dispersion of each component and obtain a uniform and fine coating slurry. Use a spraying process to evenly coat the coating slurry onto the plasma-treated herringbone tooth surface. The spraying pressure is 0.45MPa, the spraying distance is 19cm, and the coating thickness is controlled at 28μm to ensure no missed coating or dripping on the tooth surface. The coating should also be evenly coated inside the grooves at the tooth top. Step S8, Infrared Radiation Curing: The coated tape is fed into an infrared radiation curing device, employing a segmented curing process to prevent cracking and peeling of the coating due to rapid curing: In the first stage, the infrared radiation temperature is controlled at 88℃ and cured for 19 minutes, allowing the anhydrous ethanol in the coating slurry to evaporate slowly, avoiding the formation of bubbles due to excessive evaporation; In the second stage, the radiation temperature is increased to 128℃ and cured for 34 minutes, promoting the reaction between the epoxy resin and the curing agent, ensuring a tight bond between the coating and the tooth surface; In the third stage, the temperature is lowered to 108℃ and maintained for 14 minutes to further improve the coating's curing degree, enhancing its wear resistance and bonding stability with the substrate; After curing, the tape is removed and allowed to cool naturally to room temperature. At this point, the wear-resistant and noise-reducing composite layer is firmly bonded to the tooth surface, and the coating thickness is uniform. Step S9, Post-processing and Inspection: The cured belt is post-processed by first drying it at 108℃ for 1.8 hours to remove residual moisture and volatiles. Then, the belt is fully inspected using precision testing equipment. Belts that pass the inspection are cut to obtain finished high-performance herringbone tooth synchronous belts. Belts that fail the inspection are reworked until they pass the inspection.

[0045] The polytetrafluoroethylene micro powder mentioned in step S7 is of the grade TPD-503S and is provided by Fuzhou Taipuda New Material Co., Ltd.; the epoxy resin is epoxy resin E-51; the curing agent is amine curing agent T31; the graphite powder is graphite powder of grade F-1 produced by Qingdao Huatai, with an average particle size of 1000 mesh; and the silica nanoparticles have an average particle size of 60 nm. Example 5

[0046] A high-performance herringbone synchronous belt includes a belt body substrate, a tensile layer embedded inside the belt body substrate, and a herringbone tooth structure formed on one side of the belt body substrate. The tooth top of the herringbone tooth is provided with a groove; the tooth surface of the herringbone tooth is provided with a wear-resistant and noise-reducing composite layer; the belt body substrate is made of the following raw materials in parts by weight: 80 parts hydrogenated nitrile rubber, 15 parts polyurea elastomer, 1.5 parts isocyanate compatibilizer, 5 parts vulcanizing agent, 20 parts filler, 2 parts coupling agent, 3 parts antioxidant, 5 parts zinc oxide nanowires, 8 parts plasticizer, 2 parts stearic acid, and 6 parts vinyl-terminated fluorosilicone oil.

[0047] The hydrogenated nitrile butadiene rubber is Zetpol 0020 manufactured by Zeon Corporation of Japan; the polyurea elastomer is prepared according to the method for thermoplastic aliphatic polyurea elastomers in Example 2 of CN106928430B; the isocyanate compatibilizer is MDI-100LL manufactured by Wanhua Chemical; the vulcanizing agent is a compound of dicumyl peroxide, benzoyl peroxide, and bis(25) in a mass ratio of 5:1:1; the filler is a compound of fluorinated graphene, carbon nanotubes, and silica in a mass ratio of 0.1:0.5:5; the fluorinated graphene has a particle size D50 ≤ 20µm, a layer number ≤ 15, and a fluorine content of 45-65wt.%, and is provided by Shandong Zhongshan Optoelectronic Materials Co., Ltd. The carbon nanotubes are multi-walled carbon nanotubes with a diameter of 10-20 nm, an inner diameter of 5-10 nm, and a length of 10-30 µm; the silica has a particle size of 2000 mesh; the coupling agent is silane coupling agent KH550; the antioxidant is antioxidant 445; the plasticizer is plasticizer DOS; the zinc oxide nanowires have a diameter of 50 nm, a length of 20 µm, and are of type ZnO-NW-50; the vinyl-terminated fluorosilicone oil is vinyl-terminated fluorosilicone oil TPD-FS8019; the tensile layer is woven from aramid fibers with a weaving density of 30 fibers / cm and a tensile strength ≥2800 MPa.

[0048] A manufacturing process for the high-performance herringbone tooth synchronous belt includes the following steps: Step S1, Raw Material Pretreatment and Mixing: Weigh each raw material according to the formula weight parts. First, put the hydrogenated nitrile rubber into a mixer and plasticize it for 20 minutes at 90℃ and 50r / min until the rubber texture is uniform. Then, add polyurea elastomer and isocyanate compatibilizer in sequence and continue mixing for 25 minutes to promote the compatibility of the base material components. Next, add coupling agent, zinc oxide nanowires, and vinyl-terminated fluorosilicone oil and mix at a constant temperature for 15 minutes to make the nanoparticles uniformly dispersed. Then, add filler, antioxidant, plasticizer, and stearic acid, cool to 75℃, and mix for 20 minutes. Finally, add vulcanizing agent and mix at low speed for 8 minutes at a speed controlled at 30r / min to avoid premature decomposition of vulcanizing agent. After mixing, discharge the rubber compound and pass it through a two-roll mill 5 times to control the thickness at 3mm to obtain the base material. Step S2, Tensile layer pretreatment: Immerse the tensile layer woven from aramid fiber or carbon fiber in a silane coupling agent KH550 solution at a bath ratio of 1:10 (mass ratio) for 40 minutes. The silane coupling agent KH550 solution is prepared by mixing the coupling agent and anhydrous ethanol at a mass ratio of 1:10. After immersion, remove the layer and dry it at 130℃ for 3 hours to remove moisture and allow the coupling agent to form a protective film on the surface of the tensile layer, thereby improving the bonding strength between the tensile layer and the substrate adhesive. Step S3, Compression Molding: Select a mold with a herringbone tooth structure. Apply a release agent to the inner surface of the mold beforehand. The release agent should be a silicone-based release agent, and the coating thickness should be controlled at 10μm. First, lay the pre-treated tensile layer flat at the bottom of the mold. Then, evenly spread the base material on top of the tensile layer. The thickness of the base material should be 2mm thicker than the thickness of the finished strip, leaving room for subsequent compression. Then, close the mold and place it in a hydraulic press. Control the pressure at 20MPa, raise the temperature to 120℃, and preheat for 15 minutes to soften the base material and fill the mold cavity, completing the initial molding. Step S4, Microwave Segmented Vulcanization: The pre-formed belt and mold are fed into a microwave vulcanization device. A segmented vulcanization process is adopted, and vulcanization is completed in three stages to ensure uniform vulcanization and improve the density of the belt's internal structure: In the first stage, the microwave power is set to 400W, the temperature is controlled at 140℃, and vulcanization is carried out for 25 minutes. This stage mainly allows the vulcanizing agent in the rubber compound to react initially and form a basic cross-linked structure. In the second stage, the microwave power is increased to 600W, the temperature is raised to 160℃, and vulcanization is carried out for 35 minutes to accelerate the cross-linking reaction and reduce the micropores inside the belt. In the third stage, the microwave power is reduced to 300W, the temperature is lowered to 130℃, and vulcanization is carried out at this temperature for 20 minutes to eliminate internal stress and prevent deformation of the belt after cooling. After vulcanization is completed, the mold is kept closed and allowed to cool naturally to room temperature. Then the mold is opened, and the belt prototype is taken out. At this time, the belt prototype has formed a complete herringbone tooth structure and tooth top grooves.

[0049] Step S5, Edge Trimming: The extracted belt body prototype is fed into the edge trimming equipment and precision grinding is used to remove excess rubber and burrs from the edges of the belt body. During the grinding process, the grinding speed is controlled at 15m / min and the grinding accuracy is controlled within ±0.1mm to ensure that the belt body width is uniform and the herringbone teeth are regular, so as to avoid the edge burrs affecting the subsequent surface treatment and the transmission stability during use. After the edge trimming is completed, the belt body surface is blown with compressed air to remove the debris generated during grinding. Step S6, Plasma Treatment: The trimmed tape is fed into a plasma treatment device to perform plasma activation treatment on the tooth surface of the herringbone teeth, thereby improving the surface roughness and surface activity, laying the foundation for the coating of the wear-resistant and noise-reducing composite layer; Treatment parameter control: A mixture of argon and oxygen is selected as the plasma gas source, with an argon to oxygen volume ratio of 3:1, a gas flow rate of 30 mL / min, a treatment power of 200 W, a treatment distance of 8 mm, and a treatment time of 15 min; After the treatment is completed, the tape is immediately removed; Step S7, Wear-resistant and noise-reducing composite layer coating: Prepare the wear-resistant and noise-reducing composite coating slurry, which is made from the following raw materials in parts by weight: 30 parts polytetrafluoroethylene micro powder, 20 parts epoxy resin, 8 parts curing agent, 5 parts graphite powder, 4 parts silica nanoparticles, 2 parts coupling agent KH560, and 40 parts anhydrous ethanol. Mix all raw materials evenly and ultrasonically disperse them for 30 minutes using an ultrasonic dispersion device with an ultrasonic power of 300W to ensure uniform dispersion of each component and obtain a uniform and fine coating slurry. Use a spraying process to evenly coat the coating slurry onto the plasma-treated herringbone tooth surface. The spraying pressure is 0.5MPa, the spraying distance is 20cm, and the coating thickness is controlled at 30μm to ensure no missed coating or dripping on the tooth surface. The coating should also be evenly coated inside the grooves at the tooth top. Step S8, Infrared Radiation Curing: The coated tape is fed into an infrared radiation curing device. A segmented curing process is used to prevent cracking and peeling of the coating due to rapid curing: In the first stage, the infrared radiation temperature is controlled at 90℃ and cured for 20 minutes, allowing the anhydrous ethanol in the coating slurry to evaporate slowly, avoiding the formation of bubbles due to excessive evaporation; In the second stage, the radiation temperature is increased to 130℃ and cured for 35 minutes, promoting the reaction between the epoxy resin and the curing agent, so that the coating is tightly bonded to the tooth surface; In the third stage, the temperature is lowered to 110℃ and kept at that temperature for 15 minutes to further improve the curing degree of the coating, enhance the wear resistance of the coating and the bonding stability with the substrate; After curing, the tape is removed and allowed to cool naturally to room temperature. At this time, the wear-resistant and noise-reducing composite layer is firmly bonded to the tooth surface, and the coating thickness is uniform. Step S9, Post-processing and Inspection: The cured belt is post-processed by first drying it at 110℃ for 2 hours to remove residual moisture and volatiles. Then, a comprehensive inspection of the belt is carried out using precision testing equipment. Belts that pass the inspection are cut to obtain finished high-performance herringbone tooth synchronous belts. Belts that fail the inspection are reworked until they pass the inspection.

[0050] The polytetrafluoroethylene micro powder mentioned in step S7 is of the grade TPD-503S and is provided by Fuzhou Taipuda New Material Co., Ltd.; the epoxy resin is epoxy resin E-51; the curing agent is amine curing agent T31; the graphite powder is graphite powder of grade F-1 produced by Qingdao Huatai, with an average particle size of 1000 mesh; and the silica nanoparticles have an average particle size of 70 nm.

[0051] Comparative Example 1 A high-performance herringbone tooth synchronous belt and its preparation process are basically the same as those in Example 5, except that an equal amount of hydrogenated nitrile rubber is used instead of polyurea elastomer.

[0052] Comparative Example 2 A high-performance herringbone tooth synchronous belt and its preparation process are basically the same as those in Example 5, except that no isocyanate compatibilizer is added.

[0053] Comparative Example 3 A high-performance herringbone tooth synchronous belt and its preparation process are basically the same as those in Example 5, except that no end vinyl fluorosilicone oil is added.

[0054] Comparative Example 4 A high-performance herringbone tooth synchronous belt and its preparation process are basically the same as those in Example 5, except that the microwave segmented vulcanization in step S4 is replaced with traditional hot-press vulcanization. The traditional hot-press vulcanization parameters are: temperature 150℃, pressure 18MPa, constant temperature vulcanization for 70min (total time is the same as microwave segmented vulcanization), without segmented temperature and pressure control steps.

[0055] Comparative Example 5 A high-performance herringbone tooth synchronous belt and its preparation process are basically the same as those in Example 5, except that the wear-resistant and noise-reducing composite layer is not coated.

[0056] To further illustrate the beneficial technical effects of the various embodiments of the present invention, relevant performance tests were conducted on the high-performance herringbone tooth synchronous belts prepared in Example 5 and Comparative Examples 1-5. The test results are shown in Table 1, and the test methods are as follows: (1) Abrasion resistance test: The relative volumetric wear (mm) was tested according to Method A of GB / T9867-2008. 3 ).

[0057] (2) Anti-deviation performance: The synchronous belt is installed on a pulley with a deviation of 2° and run at a speed of 1000r / min for 100 hours. The belt deviation is observed and the deviation is used to measure the anti-deviation performance.

[0058] (3) Transmission noise test: The synchronous belt is installed on the synchronous belt transmission test bench, the transmission speed is set to 3000r / min, the load is 5N·m, and the noise value is measured by a noise tester at a distance of 1m from the center of the synchronous belt transmission. Each sample is measured 3 times and the average value is taken.

[0059] (4) Service life test: Refer to GB / T 18183-2000 test, adopt accelerated fatigue test mode, test environment temperature 80℃, speed 3400r / min, load 800N, run continuously until the belt tooth surface peels off, breaks, the deviation exceeds 0.5mm or the transmission fails, and stop, record the service life (h).

[0060] As shown in Table 1, the product of Example 5 exhibits the best performance across all aspects, with a relative volumetric wear of only 15 mm³, a transmission noise of 52 dB, a maximum offset of 0.12 mm over 100 hours, and a service life of up to 2850 hours. The performance of each comparative example shows varying degrees of decline. Comparative example 5, due to the lack of a wear-resistant and noise-reducing composite layer, has the worst relative volumetric wear (110 mm³), the worst transmission noise (75 dB), and the shortest service life (1680 hours). Comparative example 4, due to the use of traditional hot-press vulcanization, has the largest maximum offset (0.35 mm). Overall, the advantages of the synergistic optimization of the formulation and process in Example 5 are highlighted.

[0061] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A high-performance herringbone toothed synchronous belt, characterized in that, The belt includes a substrate, a tensile layer embedded within the substrate, and a herringbone tooth structure formed on one side of the substrate. The herringbone teeth have grooves at their tips. The tooth surfaces of the herringbone teeth have a wear-resistant and noise-reducing composite layer. The substrate is made from the following raw materials in parts by weight: 60-80 parts hydrogenated nitrile rubber, 10-15 parts polyurea elastomer, 0.8-1.5 parts isocyanate compatibilizer, 3-5 parts vulcanizing agent, 10-20 parts filler, 1.5-2 parts coupling agent, 2-3 parts antioxidant, 3-5 parts zinc oxide nanowires, 4-8 parts plasticizer, 1-2 parts stearic acid, and 4-6 parts vinyl-terminated fluorosilicone oil.

2. The high-performance herringbone tooth synchronous belt according to claim 1, characterized in that, The hydrogenated nitrile butadiene rubber is Zetpol 0020 manufactured by Zeon Corporation of Japan; the isocyanate compatibilizer is MDI-100LL manufactured by Wanhua Chemical.

3. The high-performance herringbone tooth synchronous belt according to claim 1, characterized in that, The vulcanizing agent is a compound of dicumyl peroxide, benzoyl peroxide, and bis(25) in a mass ratio of (3-5):1:

1.

4. The high-performance herringbone tooth synchronous belt according to claim 1, characterized in that, The filler is a compound of fluorinated graphene, carbon nanotubes and silica in a mass ratio of 0.1:(0.3-0.5):(3-5).

5. The high-performance herringbone tooth synchronous belt according to claim 4, characterized in that, The fluorinated graphene has a particle size D50 ≤ 20µm, a layer number ≤ 15, and a fluorine content of 45-65wt.%; the carbon nanotubes are multi-walled carbon nanotubes with a diameter of 10-20nm, an inner diameter of 5-10nm, and a length of 10-30µm; the silica has a particle size of 1500-2000 mesh.

6. The high-performance herringbone tooth synchronous belt according to claim 1, characterized in that, The coupling agent is at least one of silane coupling agent KH550, silane coupling agent KH560, and silane coupling agent KH570; the antioxidant is antioxidant 445; and the plasticizer is plasticizer DOS.

7. The high-performance herringbone tooth synchronous belt according to claim 1, characterized in that, The zinc oxide nanowires have a diameter of 50 nm, a length of 20 µm, and are of type ZnO-NW-50; the vinyl-terminated fluorosilicone oil is vinyl-terminated fluorosilicone oil TPD-FS8019.

8. The high-performance herringbone tooth synchronous belt according to claim 1, characterized in that, The tensile layer is woven from aramid fiber or carbon fiber with a weaving density of 20-30 fibers / cm and a tensile strength ≥2800MPa.

9. A manufacturing process for a high-performance herringbone tooth synchronous belt according to any one of claims 1-8, characterized in that, Includes the following steps: Step S1, Raw Material Pretreatment and Mixing: Weigh each raw material according to the formula weight parts. First, put the hydrogenated nitrile rubber into a mixer and plasticize it for 15-20 minutes at a temperature of 80-90℃ and a speed of 40-50 r / min until the rubber texture is uniform. Then, add polyurea elastomer and isocyanate compatibilizer in sequence and continue mixing for 20-25 minutes to promote the compatibility of the base material components. Next, add coupling agent, zinc oxide nanowires, and vinyl-terminated fluorosilicone oil and mix at a constant temperature for 10-15 minutes to make the nanoparticles uniformly dispersed. Then, add filler, antioxidant, plasticizer, and stearic acid, cool to 70-75℃, and mix for 15-20 minutes. Finally, add vulcanizing agent and mix at low speed for 5-8 minutes at a speed of 20-30 r / min to avoid premature decomposition of vulcanizing agent. After mixing, discharge the rubber compound and pass it through a two-roll mill 3-5 times to obtain the base material. Step S2, Tensile layer pretreatment: Immerse the tensile layer woven from aramid fiber or carbon fiber in a silane coupling agent KH550 solution for 30-40 minutes. The silane coupling agent KH550 solution is prepared by mixing the coupling agent and anhydrous ethanol at a mass ratio of 1:

10. After immersion, remove the tensile layer and dry it at 120-130℃ for 2-3 hours to remove moisture and allow the coupling agent to form a protective film on the surface of the tensile layer, thereby improving the bonding strength between the tensile layer and the substrate adhesive. Step S3, Compression Molding: Select a mold with a herringbone tooth structure. Apply a release agent to the inner surface of the mold beforehand. The release agent should be a silicone-based release agent, and the coating thickness should be controlled at 5-10 μm. First, lay the pre-treated tensile layer flat at the bottom of the mold. Then, evenly spread the base material on top of the tensile layer. The thickness of the base material should be 1-2 mm thicker than the thickness of the finished strip, leaving room for subsequent compression. Then, close the mold and place it in a hydraulic press. Control the pressure at 15-20 MPa, raise the temperature to 110-120℃, and preheat for 10-15 minutes to soften the base material and fill the mold cavity, completing the initial molding. Step S4, Microwave Segmented Vulcanization: The pre-formed belt and mold are fed into the microwave vulcanization equipment. The segmented vulcanization process is adopted, and the vulcanization is completed in three stages to ensure uniform vulcanization and improve the density of the internal structure of the belt: In the first stage, the microwave power is set to 300-400W, the temperature is controlled at 130-140℃, and the vulcanization time is 20-25 minutes. This stage mainly allows the vulcanizing agent in the rubber compound to react initially and form a basic cross-linked structure. In the second stage, the microwave power is increased to 500-600W, the temperature is raised to 150-160℃, and vulcanization is carried out for 30-35 minutes to accelerate the cross-linking reaction and reduce the micropores inside the belt. In the third stage, the microwave power is reduced to 200-300W, the temperature is lowered to 120-130℃, and vulcanization is carried out at this temperature for 15-20 minutes to eliminate internal stress and prevent deformation of the belt after cooling. After vulcanization, the mold is kept closed and allowed to cool naturally to room temperature before the mold is opened and the belt prototype is taken out. At this time, the belt prototype has formed a complete herringbone tooth structure and tooth top groove. Step S5, Edge Trimming: The extracted belt body prototype is fed into the edge trimming equipment and precision grinding is used to remove excess rubber and burrs from the edges of the belt body. During the grinding process, the grinding speed is controlled at 10-15m / min, and the grinding accuracy is controlled within ±0.1mm to ensure that the belt body width is uniform and the herringbone teeth are regular, so as to avoid the edge burrs affecting the subsequent surface treatment and the transmission stability during use. After the edge trimming is completed, the belt body surface is blown with compressed air to remove the debris generated during grinding. Step S6, Plasma Treatment: The trimmed tape is fed into a plasma treatment device to perform plasma activation treatment on the tooth surface of the herringbone teeth, improving the surface roughness and surface activity, laying the foundation for the coating of the wear-resistant and noise-reducing composite layer; Treatment parameter control: A mixture of argon and oxygen is selected as the plasma gas source, with an argon to oxygen volume ratio of 3:1, a gas flow rate of 20-30 mL / min, a treatment power of 150-200 W, a treatment distance of 5-8 mm, and a treatment time of 10-15 min; After treatment, the tape is immediately removed; Step S7, Wear-resistant and noise-reducing composite layer coating: Prepare the wear-resistant and noise-reducing composite coating slurry, which is made from the following raw materials in parts by weight: 20-30 parts polytetrafluoroethylene micro powder, 15-20 parts epoxy resin, 5-8 parts curing agent, 3-5 parts graphite powder, 2-4 parts silica nanoparticles, 1-2 parts coupling agent KH560, and 30-40 parts anhydrous ethanol. Mix all raw materials evenly and ultrasonically disperse them for 20-30 minutes using an ultrasonic dispersion device with an ultrasonic power of 200-300W to ensure uniform dispersion of each component and obtain a uniform and fine coating slurry. Use a spraying process to evenly coat the coating slurry onto the plasma-treated herringbone tooth surface. The spraying pressure is 0.3-0.5MPa, the spraying distance is 15-20cm, and the coating thickness is controlled at 20-30μm to ensure no missed coating or dripping on the tooth surface. The coating should also be evenly coated inside the grooves at the tooth top. Step S8, Infrared Radiation Curing: The coated tape is fed into the infrared radiation curing equipment and a segmented curing process is adopted to avoid cracking and peeling of the coating due to rapid curing: In the first stage, the infrared radiation temperature is controlled at 80-90℃ and cured for 15-20 minutes to allow the anhydrous ethanol in the coating slurry to evaporate slowly and avoid the generation of bubbles due to excessive evaporation. In the second stage, the radiation temperature is increased to 120-130℃ and cured for 30-35 minutes to promote the reaction between the epoxy resin and the curing agent, so that the coating is tightly bonded to the tooth surface. In the third stage, the temperature is lowered to 100-110℃ and kept at that temperature for 10-15 minutes to further improve the curing degree of the coating, enhance the wear resistance of the coating and the bonding stability with the substrate. After curing, the tape is removed and allowed to cool naturally to room temperature. At this time, the wear-resistant and noise-reducing composite layer is firmly bonded to the tooth surface and the coating thickness is uniform. Step S9, Post-processing and Inspection: The cured belt body is post-processed. First, it is dried at 100-110℃ for 1-2 hours to remove residual moisture and volatiles. Then, the belt body is comprehensively inspected using precision testing equipment. The qualified belt body is cut to obtain the finished high-performance herringbone tooth synchronous belt. The unqualified belt body is reworked until it passes the inspection.

10. The manufacturing process of the high-performance herringbone tooth synchronous belt according to claim 9, characterized in that, The polytetrafluoroethylene micro powder in step S7 is of the grade TPD-503S; the epoxy resin is epoxy resin E-51; the curing agent is amine curing agent T31; the graphite powder is graphite powder of grade F-1 produced by Qingdao Huatai, with an average particle size of 1000 mesh; and the silica nanoparticles have an average particle size of 10-70 nm.

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