Machining process for internal teeth of high-torque single-screw gearbox

Abstract

The invention belongs to the technical field of gear internal tooth machining, and discloses a high-torque single-screw gearbox internal tooth machining process which comprises the following steps: S1, material selection and pretreatment; s2, a rough machining stage; s3, a finish machining stage; s4, a heat treatment process; s5, precise grinding and tooth surface finishing; s6, surface treatment and finishing; s7, precision detection and quality control; and S8, finally assembling and testing. According to the invention, the normal work of the gear under high load is ensured. The temperature, time and atmosphere control in the carburizing process and the selection of quenching media all have important influences on the final performance of the gear, in addition, the precision and smoothness of the gear are further improved in the precision grinding and tooth surface finishing stage, the CNC gear grinding machine and the CBN grinding wheel with the particle size being P1000 are adopted, the high precision and smoothness requirements of the tooth surface are ensured, and the service life of the gear is prolonged. Through the implementation of the step, the friction loss in the gear operation process is reduced, the transmission efficiency is improved, and the service life is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of gear internal gear processing, and specifically relates to a high-torque single-screw gearbox internal gear processing technology. Background Art

[0002] Gearbox internal gear machining is an important processing method in gear manufacturing, mainly used to produce the tooth shape of the gear part of the gearbox. Different from the common external gear machining, internal gear means that the tooth surface is located on the inside of the ring, not the outside, and is usually used in transmission systems that require gears to mesh on the inside and outside. The accuracy and quality of internal gear machining directly affect the working efficiency, noise level and service life of the gear. The machining of internal gears is a process with high technical requirements. Different processing methods and technical means can be selected according to different production requirements, accuracy requirements and cost considerations.

[0003] The processing technology of the internal teeth of high-torque single-screw gearboxes is relatively complex, especially when dealing with the requirements of high loads and long-term efficient operation. For example, due to the large loads borne by the gears under high-torque applications, the requirements for gear materials are high, the processing accuracy is high, the meshing accuracy is critical, the processing technology is complex, and the cycle is long. The processing tools for internal gears need to withstand high cutting forces and temperatures, especially when processing high-strength materials used in high-torque applications. The wear of the tools will be more serious. The internal gears of high-torque single-screw gearboxes are usually made of hardened materials and are mostly subjected to complex heat treatment processes such as carburizing and quenching. These processes make the material harder, but also bring deformation and precision problems. In high-torque applications, internal gears need to ensure good surface quality to reduce tooth surface friction, extend gear service life and improve transmission efficiency. In high-torque applications, internal gears need to withstand long-term high loads, which requires the gears to have good fatigue resistance. Summary of the invention

[0004] The object of the present invention is to provide a high torque single screw gearbox internal gear machining process to solve the problems raised in the above background technology.

[0005] In order to achieve the above object, the present invention provides the following technical solution: a high torque single screw gearbox internal gear processing process, comprising the following steps:

[0006] S1: Material selection and pretreatment;

[0007] S2: rough machining stage;

[0008] S3: finishing stage;

[0009] S4: heat treatment process;

[0010] S5: precision grinding and tooth surface finishing;

[0011] S6: Surface treatment and finishing;

[0012] S7: precision testing and quality control;

[0013] S8: Final assembly and testing.

[0014] As a further technical solution of the present invention, the material selection and pretreatment include using 18CrNiMo7-6 alloy steel, which has good comprehensive mechanical properties, wear resistance and fatigue resistance, and is suitable for high-load transmission parts, and normalizing the raw materials to eliminate internal stress and improve uniformity to ensure the quality of subsequent processing, wherein the normalizing heating temperature is 850°C, the holding time is 2 hours, and air is used to cool to room temperature.

[0015] As a further technical solution of the present invention, the rough machining stage includes using a CNC vertical milling machine for rough machining, using a special internal tooth milling cutter to remove most of the excess material, and the tool is a CVD coated high-speed steel internal tooth milling cutter with a diameter of 120 mm and 6 teeth. The cutting parameters are mainly cutting speed: 80 m / min, feed speed: 0.1 mm / tooth, cutting depth: 4 mm, cutting removal amount per time: 2 mm, and the cutting fluid uses a fully synthetic cutting fluid to maintain the cooling effect.

[0016] As a further technical solution of the present invention, the finishing stage includes using a CNC gear hobbing machine to finish the internal teeth to ensure the meshing accuracy and tooth shape quality of the gears. The tool adopts a precision gear hobbing tool (high-speed steel HSS) with 6 teeth. The cutting parameters are mainly cutting speed: 100m / min, feed speed: 0.05mm / tooth, cutting depth: 1.5mm, tooth surface roughness requirement: Ra≤0.8μm, and transmission accuracy requirement: ISO level 4.

[0017] As a further technical solution of the present invention, the heat treatment process includes carburizing and quenching heat treatment to improve the hardness and wear resistance of the tooth surface to ensure that the gear can work normally under high load, wherein the carburizing temperature is 930°C, the carburizing time is 8 hours, the carburizing atmosphere is high concentration methane, the quenching medium is oil cooling, and the tooth surface hardness after carburizing reaches HRC58-62, so that it has excellent wear resistance and fatigue resistance.

[0018] As a further technical solution of the present invention, the precision grinding and tooth surface finishing include using a CNC gear grinder for precision grinding to ensure the smoothness of the tooth surface and high-precision tooth shape. The grinding tool adopts a CBN grinding wheel with a particle size of P1000, and the grinding parameters are feed speed: 0.02mm / tooth, cutting speed: 30m / s, grinding depth: 0.02mm, cooling method: oil mist cooling, and the tooth surface roughness requirement is Ra≤0.4μm, ensuring that the gear has lower friction loss during operation.

[0019] As a further technical solution of the present invention, the surface treatment and finishing includes laser cladding surface strengthening treatment of the tooth surface to further improve the wear resistance and fatigue resistance of the tooth surface, wherein the laser power is 2kW, the laser wavelength is 1064nm, the laser scanning speed is 20mm / s, the cladding material is WC-Co alloy powder, and the hardness of the tooth surface after laser cladding needs to reach: HRC65.

[0020] As a further technical solution of the present invention, the precision detection and quality control include using a three-coordinate measuring machine to perform dimensional detection on the gear to ensure that its various dimensions meet the design standards, using a gear measuring instrument to detect the tooth profile error to ensure that the tooth profile error meets the ISO 4 level precision requirement, and using a roughness meter to measure the tooth surface roughness to ensure that the tooth surface roughness meets the requirement: Ra≤0.4μm.

[0021] As a further technical solution of the present invention, the final assembly and testing includes assembling the internal gear with other components to ensure the matching accuracy of the components of the transmission system, performing a maximum torque load test to ensure that the gearbox can operate stably under high load without abnormal noise or vibration, and performing a durability test to ensure that the gearbox can run for 3,000 hours without trouble under different loads and speeds.

[0022] The beneficial effects of the present invention are as follows:

[0023] (1) The present invention adopts 18CrNiMo7-6 alloy steel as the gear material. The material is particularly suitable for high-load transmission parts due to its good comprehensive mechanical properties, wear resistance and fatigue resistance. The normalizing treatment effectively eliminates the stress inside the material, improves the uniformity of the material, and lays a solid foundation for subsequent processing. This step not only optimizes the microstructure of the material, but also significantly improves the overall performance of the gear. In the rough machining and finishing stages, the advanced CNC machining equipment is used in combination with a special internal gear milling cutter and a precision gear hobbing tool to achieve precise control of the gear tooth shape. The cutting parameters, such as cutting speed, feed speed and cutting depth, are optimized to ensure stability and efficiency during the machining process. In particular, in the finishing stage, the strict requirements on tooth shape accuracy and tooth surface roughness are met, so that the meshing accuracy and transmission efficiency of the gear are significantly improved. The carburizing and quenching heat treatment not only improves the hardness and wear resistance of the tooth surface, but also ensures the normal operation of the gear under high load. The temperature, time and atmosphere control during the carburizing process, as well as the selection of quenching media, all have an important impact on the final performance of the gear. In addition, the precision grinding and tooth surface finishing stage further improves the accuracy and smoothness of the gear. The use of CNC gear grinders and CBN grinding wheels with a particle size of P1000 ensures the high precision and smoothness requirements of the tooth surface. The implementation of this step not only reduces the friction loss during gear operation, but also improves the transmission efficiency and service life.

[0024] (2) The present invention achieves a significant improvement in the tooth surface hardness by precisely controlling the laser power, wavelength and scanning speed, and selecting a suitable cladding material. The implementation of this step not only enhances the load-bearing capacity of the gear, but also extends its service life. By adopting advanced three-coordinate measuring instruments, gear measuring instruments and roughness meters, the various dimensions, tooth profile errors and tooth surface roughness of the gear are strictly tested. This step ensures that the processing accuracy and quality of the gear meet the design requirements, providing a strong guarantee for the stable operation of the gearbox. Through precise assembly and strict load testing, the stable operation of the gearbox under high load is ensured. The implementation of maximum torque load test and durability test not only verifies the load-bearing capacity and stability of the gearbox, but also provides a reliable guarantee for its long-term operation under different loads and speeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall process of the present invention. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1 As shown, in an embodiment of the present invention, a high torque single screw gearbox internal gear processing process includes the following steps:

[0028] S1: Material selection and pretreatment;

[0029] S2: rough machining stage;

[0030] S3: finishing stage;

[0031] S4: heat treatment process;

[0032] S5: precision grinding and tooth surface finishing;

[0033] S6: Surface treatment and finishing;

[0034] S7: precision testing and quality control;

[0035] S8: Final assembly and testing.

[0036] By carefully selecting and pre-treating high-strength, wear-resistant materials as the starting point, the process gradually enters the rough machining stage, laying the foundation for the formation of the basic shape of the gear. Subsequently, the finishing stage further refines the gear profile and improves the surface quality. The application of heat treatment technology effectively enhances the hardness and toughness of the material, while precision grinding and tooth surface finishing ensure the precise meshing and low-noise operation of the gear. The surface treatment and finishing steps not only improve the appearance of the gear, but also enhance its corrosion resistance. Under strict precision testing and quality control, each gear product meets high standards. Finally, after precise assembly and comprehensive testing, the overall high performance and reliability of the gearbox are ensured.

[0037] Among them, material selection and pretreatment include the use of 18CrNiMo7-6 alloy steel, which has good comprehensive mechanical properties, wear resistance and fatigue resistance, and is suitable for high-load transmission parts. The raw materials are normalized to eliminate internal stress and improve uniformity to ensure the quality of subsequent processing. The normalizing heating temperature is 850°C, the holding time is 2 hours, and air is used to cool to room temperature.

[0038] 18CrNiMo7-6 alloy steel is used as the core material. This decision is based on its excellent comprehensive performance: excellent mechanical strength, wear resistance and fatigue resistance, making it an ideal choice for high-load transmission components. In order to ensure that the potential of the material is fully utilized, the raw materials need to undergo the key step of normalizing. By precisely controlling the heating to 850°C and maintaining the insulation time for 2 hours, the residual stress inside the material is effectively eliminated, further improving the uniformity and stability of the material. The subsequent air cooling process naturally reduces the material temperature to room temperature, laying a solid foundation for subsequent precision processing.

[0039] Among them, the rough machining stage includes rough machining using a CNC vertical milling machine, using a special internal tooth milling cutter to remove most of the excess material. The tool is a CVD coated high-speed steel internal tooth milling cutter with a diameter of 120mm and 6 teeth. The main cutting parameters are cutting speed: 80m / min, feed speed: 0.1mm / tooth, cutting depth: 4mm, cutting removal amount per time: 2mm, and the cutting fluid uses a fully synthetic cutting fluid to maintain the cooling effect.

[0040] In the rough machining stage, the gear manufacturing of the high-torque single-screw gearbox adopts an advanced CNC vertical milling machine, which is matched with a special internal tooth milling cutter to efficiently complete the removal of most of the excess material. Here, the CVD-coated high-speed steel internal tooth milling cutter with its 120mm diameter and 6-tooth design shows excellent cutting performance. By accurately setting the cutting parameters, the main cutting speed is 80m / min, the feed speed is 0.1mm / tooth and the cutting depth is 4mm. The cutting removal amount is accurately controlled at 2mm each time, ensuring the efficiency and stability of the machining process. At the same time, the continuous use of the fully synthetic cutting fluid effectively maintains the cooling effect of the cutting area, prevents the tool from overheating and the workpiece from deformation, and further improves the machining accuracy and surface quality.

[0041] Among them, the finishing stage includes the use of CNC gear hobbing machine to finish the internal teeth to ensure the meshing accuracy and tooth shape quality of the gears. The tool uses a precision gear hobbing tool (high-speed steel HSS) with 6 teeth. The cutting parameters are mainly cutting speed: 100m / min, feed speed: 0.05mm / tooth, cutting depth: 1.5mm, tooth surface roughness requirement: Ra≤0.8μm, transmission accuracy requirement: ISO level 4.

[0042] The precision gear hobbing tool (HSS) has a 6-tooth design, with optimized cutting parameters, a main cutting speed of 100m / min, a feed speed of 0.05mm / tooth and a cutting depth of 1.5mm, which achieves fine carving of the teeth. At this stage, there are strict requirements on the tooth surface roughness, which must meet the standard of Ra≤0.8μm to ensure the smoothness and low noise of the gear operation. At the same time, the transmission accuracy is required to reach ISO level 4, which further verifies the high quality and reliability of the gearbox teeth. The application of this series of fine processes not only improves the overall performance of the gearbox, but also provides convenience for subsequent use and maintenance.

[0043] Among them, the heat treatment process includes carburizing and quenching heat treatment to improve the hardness and wear resistance of the tooth surface to ensure that the gear can work normally under high load. Among them, the carburizing temperature is 930°C, the carburizing time is 8 hours, the carburizing atmosphere is high concentration methane, the quenching medium is oil cooling, and the tooth surface hardness after carburizing reaches HRC58-62, which makes it have excellent wear resistance and fatigue resistance.

[0044] Through the carburizing and quenching heat treatment technology, the hardness and wear resistance of the tooth surface are significantly improved, ensuring the stable operation of the gear under high load environment. In this process, the precisely controlled carburizing temperature of 930°C, the carburizing time of up to 8 hours and the high-concentration methane carburizing atmosphere jointly promote the effective penetration of carbon elements, laying a solid foundation for the improvement of the tooth surface hardness. The subsequent oil-cooling quenching process further strengthens the microstructure of the material, so that the tooth surface hardness reaches the high standard of HRC58-62, giving the gear excellent wear resistance and fatigue resistance.

[0045] Among them, precision grinding and tooth surface finishing include precision grinding using CNC gear grinders to ensure tooth surface smoothness and high-precision tooth shape. The grinding tool uses a CBN grinding wheel with a particle size of P1000. The grinding parameters are feed speed: 0.02mm / tooth, cutting speed: 30m / s, grinding depth: 0.02mm, cooling method: oil mist cooling, and the tooth surface roughness requirement is Ra≤0.4μm, ensuring that the gear has lower friction loss during operation.

[0046] By using advanced CNC gear grinders, combined with high-precision CBN grinding wheels (grain size P1000), the tooth surfaces are extremely polished and trimmed. By finely controlling the grinding parameters, such as feed speed 0.02mm / tooth, cutting speed 30m / s and grinding depth 0.02mm, the high precision of tooth surface finish and tooth shape is ensured. At the same time, the effective application of oil mist cooling not only maintains the appropriate temperature in the grinding area, but also improves the grinding efficiency and workpiece quality. Finally, the tooth surface roughness meets the strict requirement of Ra≤0.4μm. This ultra-smooth surface greatly reduces the friction loss during gear operation and improves the overall transmission efficiency and service life.

[0047] Among them, surface treatment and finishing include laser cladding surface strengthening treatment of the tooth surface to further improve the wear resistance and fatigue resistance of the tooth surface. Among them, the laser power is: 2kW, laser wavelength: 1064nm, laser scanning speed: 20mm / s, cladding material: WC-Co alloy powder, and the hardness of the tooth surface after laser cladding needs to reach: HRC65.

[0048] Through the precise control of laser parameters, 2kW laser power, 1064nm laser wavelength and 20mm / s laser scanning speed, combined with high-quality WC-Co alloy powder as cladding material, not only the wear resistance and fatigue resistance of the tooth surface are significantly improved, but also the uniformity and density of the cladding layer are ensured. After laser cladding, the tooth surface hardness is as high as HRC65. This excellent performance index enables the gear to maintain long-term and stable operation in a more stringent working environment. This series of surface treatment measures not only enhances the overall performance of the gear, but also extends its service life.

[0049] Among them, precision inspection and quality control include using a three-coordinate measuring machine to inspect the size of the gears to ensure that their dimensions meet the design standards, using a gear measuring instrument to detect the tooth profile error to ensure that the tooth profile error meets the ISO 4 level precision requirements, and using a roughness meter to measure the tooth surface roughness to ensure that the tooth surface roughness meets the requirements: Ra≤0.4μm.

[0050] The precise use of the three-coordinate measuring machine has carried out a comprehensive and detailed measurement of the various dimensions of the gears, strictly verifying whether they meet the design standards. The professional inspection of the gear measuring instrument focuses on the tooth profile error to ensure that each tooth profile can meet the high precision requirements of ISO level 4, providing a strong guarantee for the smooth meshing and efficient transmission of the gears. At the same time, the precise measurement of the roughness meter further verifies whether the tooth surface roughness meets the strict standard of Ra≤0.4μm. This ultra-smooth surface not only reduces friction loss, but also improves the overall performance of the gear.

[0051] The final assembly and testing includes assembling the internal gear with other components to ensure the matching accuracy of the transmission system components, conducting a maximum torque load test to ensure that the gearbox can operate stably under high load without abnormal noise or vibration, and conducting a durability test to ensure that the gearbox can run for 3,000 hours without trouble under different loads and speeds.

[0052] The precise assembly of the internal gears and other parts ensures perfect coordination and high-precision operation of the transmission system components. The subsequent maximum torque load test simulates the operation of the gearbox under high-load conditions, verifies its stable performance under extreme conditions, and ensures that no abnormal noise or vibration is generated. In addition, the strict implementation of the durability test verifies the operating stability of the gearbox under different load and speed conditions for up to 3,000 hours without any trouble, which fully proves its excellent durability and reliability.

[0053] By using 18CrNiMo7-6 alloy steel as the gear material, this material is particularly suitable for high-load transmission parts with its good comprehensive mechanical properties, wear resistance and fatigue resistance. Through normalizing treatment, the stress inside the material is effectively eliminated, the uniformity of the material is improved, and a solid foundation is laid for subsequent processing. This step not only optimizes the microstructure of the material, but also significantly improves the overall performance of the gear. In the roughing and finishing stages, by using advanced CNC processing equipment, combined with special internal gear milling cutters and precision hobbing tools, precise control of the gear tooth shape is achieved. By optimizing cutting parameters such as cutting speed, feed speed and cutting depth, the stability and efficiency of the processing process are ensured. Especially in the finishing stage, the strict requirements on tooth shape accuracy and tooth surface roughness have significantly improved the meshing accuracy and transmission efficiency of the gear. Through carburizing and quenching heat treatment, not only the hardness and wear resistance of the tooth surface are improved, but also the normal operation of the gear under high load is ensured. The temperature, time and atmosphere control during the carburizing process, as well as the selection of quenching media, all have an important impact on the final performance of the gear. In addition, the precision grinding and tooth surface finishing stage further improves the accuracy and smoothness of the gear. The use of CNC gear grinders and CBN grinding wheels with a particle size of P1000 ensures the high precision and smoothness requirements of the tooth surface. The implementation of this step not only reduces the friction loss during gear operation, but also improves the transmission efficiency and service life.

[0054] By precisely controlling the laser power, wavelength and scanning speed, as well as selecting the appropriate cladding material, a significant improvement in the tooth surface hardness is achieved. The implementation of this step not only enhances the gear's load-bearing capacity, but also extends its service life. By using advanced three-coordinate measuring instruments, gear measuring instruments and roughness meters, the gear's various dimensions, tooth profile errors and tooth surface roughness are strictly tested. This step ensures that the gear's machining accuracy and quality meet the design requirements, providing a strong guarantee for the stable operation of the gearbox. Through precise assembly and strict load testing, the stable operation of the gearbox under high load is ensured. The implementation of maximum torque load testing and durability testing not only verifies the gearbox's load-bearing capacity and stability, but also provides a reliable guarantee for its long-term operation under different loads and speeds.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high torque single screw gearbox internal gear processing process, comprising the following steps: S1: Material selection and pretreatment; S2: rough machining stage; S3: finishing stage; S4: heat treatment process; S5: precision grinding and tooth surface finishing; S6: Surface treatment and finishing; S7: precision testing and quality control; S8: Final assembly and testing.

2. A high torque single screw gearbox internal gear processing process according to claim 1, characterized in that: The material selection and pretreatment include using 18CrNiMo7-6 alloy steel, which has good comprehensive mechanical properties, wear resistance and fatigue resistance, and is suitable for high-load transmission parts. The raw materials are normalized to eliminate internal stress and improve uniformity to ensure the quality of subsequent processing. The normalizing heating temperature is 850°C, the holding time is 2 hours, and air is used to cool to room temperature.

3. A high torque single screw gearbox internal gear processing process according to claim 1, characterized in that: The rough machining stage includes rough machining using a CNC vertical milling machine, using a special internal tooth milling cutter to remove most of the excess material, the tool is a CVD coated high-speed steel internal tooth milling cutter with a diameter of 120mm and 6 teeth, the cutting parameters are mainly cutting speed: 80m / min, feed speed: 0.1mm / tooth, cutting depth: 4mm, each cutting removal: 2mm, and the cutting fluid uses a fully synthetic cutting fluid to maintain the cooling effect.

4. The high torque single screw gearbox internal gear processing process according to claim 1, characterized in that: The finishing stage includes finishing the internal teeth with a CNC gear hobbing machine to ensure the meshing accuracy and tooth shape quality of the gears. The tool uses a precision gear hobbing tool (high-speed steel HSS) with 6 teeth. The cutting parameters are mainly cutting speed: 100m / min, feed speed: 0.05mm / tooth, cutting depth: 1.5mm, tooth surface roughness requirement: Ra≤0.8μm, and transmission accuracy requirement: ISO level 4.

5. The high torque single screw gearbox internal gear processing process according to claim 1, characterized in that: The heat treatment process includes carburizing and quenching heat treatment to improve the hardness and wear resistance of the tooth surface and ensure that the gear can work normally under high load, wherein the carburizing temperature is 930°C, the carburizing time is 8 hours, the carburizing atmosphere is high concentration methane, the quenching medium is oil cooling, and the tooth surface hardness after carburizing reaches HRC58-62, which makes it have excellent wear resistance and fatigue resistance.

6. The high torque single screw gearbox internal gear processing process according to claim 1, characterized in that: The precision grinding and tooth surface finishing include precision grinding using a CNC gear grinder to ensure tooth surface smoothness and high-precision tooth shape. The grinding tool uses a CBN grinding wheel with a particle size of P1000. The grinding parameters are feed speed: 0.02mm / tooth, cutting speed: 30m / s, grinding depth: 0.02mm, cooling method: oil mist cooling, and the tooth surface roughness requirement is Ra≤0.4μm, ensuring that the gear has lower friction loss during operation.

7. The high torque single screw gearbox internal gear processing process according to claim 1, characterized in that: The surface treatment and finishing include laser cladding surface strengthening treatment on the tooth surface to further improve the wear resistance and fatigue resistance of the tooth surface, wherein the laser power is 2kW, the laser wavelength is 1064nm, the laser scanning speed is 20mm / s, the cladding material is WC-Co alloy powder, and the hardness of the tooth surface after laser cladding needs to reach HRC65.

8. The high torque single screw gearbox internal gear processing process according to claim 1, characterized in that: The precision inspection and quality control include using a three-coordinate measuring machine to inspect the dimensions of the gears to ensure that their dimensions meet the design standards, using a gear measuring instrument to inspect the tooth profile error to ensure that the tooth profile error meets the ISO 4 level precision requirements, and using a roughness meter to measure the tooth surface roughness to ensure that the tooth surface roughness meets the requirements: Ra≤0.4μm.

9. The high torque single screw gearbox internal gear processing process according to claim 1, characterized in that: The final assembly and testing includes assembling the internal gear with other components to ensure the matching accuracy of the various components of the transmission system, performing a maximum torque load test to ensure that the gearbox can operate stably under high load without abnormal noise or vibration, and performing a durability test to ensure that the gearbox can run for 3,000 hours without trouble under different loads and speeds.

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