High-concentricity welding method for high-precision gear shaft

Abstract

The invention discloses a high-precision gear shaft high-concentricity welding method which comprises the following steps: S1, in a material preparation process, selecting a proper high-strength metal material, ensuring no defect and meeting design requirements, cutting and cleaning the material, removing impurities, then marking and classifying the material, and ensuring that the material is not damaged or deformed in subsequent processing; and S2, in the welding preparation stage, a high-precision clamp is used for fixing the gear shaft, and the concentricity is adjusted. Through the steps of material preparation, positioning, welding, cooling and shaping, it is ensured that a welded part has extremely high concentricity and mechanical strength. According to the method, deformation caused by thermal stress in the welding process can be effectively reduced, and the surface quality and durability of the welded part are improved. By means of the method, the welding precision, strength and durability of products can be greatly improved, it is ensured that the gear shaft assembly meets the use requirement of a high-precision mechanical system, and the method is particularly suitable for being applied to the high-precision fields such as unmanned aerial vehicles and robots.

Description

Technical Field

[0001] The invention relates to the technical field of gear shaft welding, and in particular to a high-precision gear shaft high concentricity welding method. Background Art

[0002] High-precision gear shafts play an important role in modern technology, especially in high-end precision equipment such as drones and robots. As a key component of the transmission system, gear shafts directly affect the accuracy, stability and durability of the equipment. In drones, gear shafts control the accuracy of flight attitude, while in robots, they ensure the precise operation of moving parts.

[0003] However, there are several disadvantages in the current high-precision gear shafts. First, it is difficult to ensure sufficient concentricity with traditional welding processes, resulting in reduced accuracy of the transmission system and affecting the overall performance of the equipment. Second, due to improper thermal stress handling, deformation or cracks often occur during welding, reducing the service life and strength of the components. Finally, the surface quality is often difficult to control, resulting in increased friction during equipment operation, affecting efficiency and durability.

[0004] In response to the above problems, we have introduced a high-precision gear shaft high concentricity welding method. Summary of the invention

[0005] The invention discloses a high-precision gear shaft high-concentricity welding method, aiming to solve the technical problems in the background technology.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A high-precision gear shaft high concentricity welding method comprises the following steps:

[0008] S1. During the material preparation process, select suitable high-strength metal materials to ensure that they are free of defects and meet the design requirements, cut and clean the materials, remove impurities, and then mark and classify the materials to ensure that they are not damaged or deformed during subsequent processing;

[0009] The step S1 can be refined as follows:

[0010] S11. Choose high-strength metal materials, such as alloy steel or titanium alloy, to ensure that the materials have excellent mechanical properties;

[0011] S12. Check the surface finish and roundness of the material to ensure that there are no cracks, dents or other defects on the surface of the material;

[0012] S13. Cut the material into required size according to design requirements and check the flatness of the cut surface;

[0013] S14. Clean the cut materials to remove surface impurities, oxide layers and oil stains;

[0014] S15. Mark and classify the prepared materials and place them according to the process requirements to prevent deformation or damage of the materials.

[0015] S2. During the welding preparation stage, use a high-precision fixture to fix the gear shaft and adjust the concentricity to ensure accurate positioning. Then, lock the fixture to prevent the workpiece from moving during the welding process. Finally, perform secondary calibration and concentricity testing to ensure that the preparation before welding is sufficient.

[0016] The step S2 can be refined as follows:

[0017] S21. Use high-precision fixtures to fix the gear shaft and accessories at the welding station to ensure that their center lines are aligned;

[0018] S22. Precision adjust the fixture and use laser measuring equipment to detect concentricity to ensure accurate positioning;

[0019] S23, lock the fixture to ensure that the workpiece does not move or loosen during the welding process;

[0020] S24. Perform secondary positioning and calibration on the gear shaft through mechanical or automated devices to ensure that the concentricity before welding meets the process standards;

[0021] S25. Perform concentricity test again and enter welding process only after confirmation that everything is ready.

[0022] S3. During the welding process, select the appropriate welding process according to the characteristics of the gear shaft, such as laser welding or resistance welding, and adjust the power and speed of the equipment to ensure the stability of welding. Pre-treat the welding area to ensure that the surface is clean and free of impurities, and use protective gas or coating to prevent oxidation. Finally, set up a cooling system to ensure that the temperature is reasonably controlled after welding to avoid deformation caused by thermal stress;

[0023] The step S3 can be refined as follows:

[0024] S31. Select a suitable welding process according to the characteristics of the material and the gear shaft, preferably laser welding or resistance welding;

[0025] S32, adjusting the power, welding speed and welding current of the welding equipment to ensure the stability and concentricity of the welding;

[0026] S33. Perform pretreatment on the welding area, such as polishing and cleaning, to ensure that the welding surface is free of impurities and oxides;

[0027] S34. Select appropriate shielding gas or protective coating to prevent oxidation or contamination of materials during welding;

[0028] S35. Set the cooling system parameters to ensure that the temperature after welding is controlled within the appropriate range to prevent deformation caused by thermal stress.

[0029] S4. During the welding process, start the equipment for precision welding, ensure the path is accurate and monitor the temperature in real time through the temperature sensor to prevent overheating, use automated equipment to ensure the weld is continuous and uniform, and adjust the welding speed and power according to the heat distribution. After welding is completed, keep the workpiece fixed to prevent concentricity deviation caused by welding stress;

[0030] The step S4 can be refined as follows:

[0031] S41, start the welding equipment and start high-precision welding operation to ensure the accuracy of the welding path;

[0032] S42. Use temperature sensors and automatic adjustment systems to monitor welding temperature in real time to prevent local overheating;

[0033] S43. Use automated welding equipment to ensure weld continuity and prevent welds from being too wide or too narrow;

[0034] S44. According to the heat distribution of the welding point, adjust the welding speed and power in time to ensure uniform welding;

[0035] S45. After welding is completed, continue to keep the workpiece fixed in the fixture to avoid concentricity deviation caused by welding stress.

[0036] S5. After welding is completed, gradually cool the welded parts to reduce the influence of thermal stress. Then, check the surface quality of the weld to ensure that there are no cracks or pores. Use laser equipment to preliminarily detect the concentricity of the welded parts and record the relevant data. According to the test results, if necessary, perform secondary heat treatment or correction operations on the local area. Finally, clean the surface of the welded parts to remove impurities and residues.

[0037] The step S5 can be refined as follows:

[0038] S51. After welding, gradually cool the weldment and use a controlled cooling system to reduce the effects of thermal stress;

[0039] S52. Check the surface quality of the weld to ensure that there are no cracks, pores or other surface defects in the weld;

[0040] S53. Use laser detection equipment to preliminarily detect the concentricity of the welded parts and record the relevant deviation data;

[0041] S54. Perform secondary heat treatment or correction operation on the local area if necessary according to the test results;

[0042] S55. Clean the surface of the weldment and remove impurities or residues that may be generated during the welding process.

[0043] S6. Use high-precision equipment to shape the welded parts and correct possible minor deformations. Then, check the geometric dimensions and concentricity to ensure that they meet the design standards. Use grinding and polishing processes to treat the surface and remove excess materials. If concentricity deviation is found, make fine adjustments to ensure that the accuracy meets the requirements. Finally, complete comprehensive quality inspection and record the results.

[0044] The step S6 can be refined as follows:

[0045] S61. Use high-precision shaping equipment to shape the welded parts and correct the slight deformation that may occur during the welding process;

[0046] S62. Check the geometric dimensions and concentricity of the welded parts after shaping to ensure that the accuracy meets the requirements;

[0047] S63. Use precision grinding and polishing technology to process the surface of the welded parts and remove excess material;

[0048] S64. If concentricity deviation is found, make fine adjustments to ensure that the weldment meets the designed concentricity requirements;

[0049] S65. Finally, conduct a comprehensive quality inspection and record the measurement results and finishing status of each workpiece.

[0050] S7. Perform a final concentricity test on the welded parts to ensure that they are within the design tolerance range. Then, perform a weld strength test to ensure that their mechanical strength meets the requirements. Check the surface quality to ensure that there are no defects or cracks. Then perform a durability test to simulate the stress conditions in the working environment and verify the durability of the welded parts. Finally, the welded parts that pass the inspection are marked and packaged, ready for shipment or commissioning.

[0051] The step S76 can be broken down into:

[0052] S71. Use a high-precision concentricity detector to conduct final inspection on welded parts to ensure that the concentricity is within the design tolerance range;

[0053] S72. Conduct weld strength test to ensure that the welded parts have sufficient mechanical strength under working conditions;

[0054] S73. Check the surface quality of welded parts to ensure there are no obvious flaws, cracks or welding residues;

[0055] S74. Conduct durability tests to simulate stress conditions in actual working environments and detect the durability of welded parts;

[0056] S75. Welded parts that pass the final inspection are marked, packaged, and prepared for shipment or use.

[0057] The high-precision gear shaft high concentricity welding method provided by the present invention has the following advantages:

[0058] This method ensures that the welded parts have extremely high concentricity and mechanical strength through material preparation, positioning, welding, cooling and shaping steps. This method can effectively reduce the deformation caused by thermal stress during welding and improve the surface quality and durability of the welded parts. This method can greatly improve the welding accuracy, strength and durability of the product, ensuring that the gear shaft assembly meets the use requirements of high-precision mechanical systems, especially suitable for applications in high-precision fields such as drones and robots. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 The present invention provides a schematic diagram of the overall process of a high-precision gear shaft high concentricity welding method.

[0060] Figure 2 The figure is a schematic flow chart of step S1 of a high-precision gear shaft high concentricity welding method proposed in the present invention.

[0061] Figure 3 The figure is a schematic flow chart of step S2 of a high-precision gear shaft high concentricity welding method proposed in the present invention.

[0062] Figure 4 The figure is a schematic flow chart of step S3 of a high-precision gear shaft high concentricity welding method proposed by the present invention.

[0063] Figure 5 The figure is a schematic flow chart of step S4 of a high-precision gear shaft high concentricity welding method proposed by the present invention.

[0064] Figure 6 The figure is a schematic flow chart of step S5 of a high-precision gear shaft high concentricity welding method proposed by the present invention.

[0065] Figure 7 The figure is a schematic flow chart of step S6 of a high-precision gear shaft high concentricity welding method proposed in the present invention.

[0066] Figure 8 The figure is a schematic flow chart of step S7 of a high-precision gear shaft high concentricity welding method proposed by the present invention. DETAILED DESCRIPTION

[0067] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application usually described and marked in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0068] The invention discloses a high-concentricity welding method for a high-precision gear shaft.

[0069] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a high-precision gear shaft high concentricity welding method comprises the following steps:

[0070] S1. During the material preparation process, select suitable high-strength metal materials to ensure that they are free of defects and meet the design requirements, cut and clean the materials, remove impurities, and then mark and classify the materials to ensure that they are not damaged or deformed during subsequent processing;

[0071] The step S1 can be refined as follows:

[0072] S11. Choose high-strength metal materials, such as alloy steel or titanium alloy, to ensure that the materials have excellent mechanical properties;

[0073] S12. Check the surface finish and roundness of the material to ensure that there are no cracks, dents or other defects on the surface of the material;

[0074] S13. Cut the material into required size according to design requirements and check the flatness of the cut surface;

[0075] S14. Clean the cut materials to remove surface impurities, oxide layers and oil stains;

[0076] S15. Mark and classify the prepared materials and place them according to the process requirements to prevent deformation or damage of the materials;

[0077] This embodiment: In this step, high-strength metal materials are selected to ensure that they have good mechanical properties and no defects. The materials are then cut according to the design requirements and the flatness of the cut surface is checked. After cutting, the materials are cleaned to remove impurities, oxide layers and oil stains to ensure surface finish. Finally, the materials are marked and classified and properly placed to prevent deformation or damage in subsequent processing.

[0078] S2. During the welding preparation stage, use a high-precision fixture to fix the gear shaft and adjust the concentricity to ensure accurate positioning. Then, lock the fixture to prevent the workpiece from moving during the welding process. Finally, perform secondary calibration and concentricity testing to ensure that the preparation before welding is sufficient.

[0079] The step S2 can be refined as follows:

[0080] S21. Use high-precision fixtures to fix the gear shaft and accessories at the welding station to ensure that their center lines are aligned;

[0081] S22. Precision adjust the fixture and use laser measuring equipment to detect concentricity to ensure accurate positioning;

[0082] S23, lock the fixture to ensure that the workpiece does not move or loosen during the welding process;

[0083] S24. Perform secondary positioning and calibration on the gear shaft through mechanical or automated devices to ensure that the concentricity before welding meets the process standards;

[0084] S25, perform concentricity test again, and enter welding process only after confirmation that it is ready;

[0085] This embodiment: In this step, a high-precision fixture is used to fix the gear shaft and adjust the concentricity to ensure accurate positioning. The fixture is then locked to prevent the workpiece from moving during welding. Through secondary calibration and testing, the concentricity is ensured to meet the process standards, providing full preparation for welding.

[0086] S3. During the welding process, select the appropriate welding process according to the characteristics of the gear shaft, such as laser welding or resistance welding, and adjust the power and speed of the equipment to ensure the stability of welding. Pre-treat the welding area to ensure that the surface is clean and free of impurities, and use protective gas or coating to prevent oxidation. Finally, set up a cooling system to ensure that the temperature is reasonably controlled after welding to avoid deformation caused by thermal stress;

[0087] The step S3 can be refined as follows:

[0088] S31. Select a suitable welding process according to the characteristics of the material and the gear shaft, preferably laser welding or resistance welding;

[0089] S32, adjusting the power, welding speed and welding current of the welding equipment to ensure the stability and concentricity of the welding;

[0090] S33. Perform pretreatment on the welding area, such as polishing and cleaning, to ensure that the welding surface is free of impurities and oxides;

[0091] S34. Select appropriate shielding gas or protective coating to prevent oxidation or contamination of materials during welding;

[0092] S35. Set the cooling system parameters to ensure that the temperature after welding is controlled within the appropriate range to prevent deformation caused by thermal stress;

[0093] This embodiment: In this step, select a suitable welding process, such as laser welding or resistance welding, and adjust the power and speed of the equipment to ensure stable welding. Pre-treat the welding area to ensure that there are no impurities or oxides on the surface, and use protective gas or coating to prevent oxidation. Finally, set up a cooling system to control the temperature after welding to avoid deformation caused by thermal stress.

[0094] S4. During the welding process, start the equipment for precision welding, ensure the path is accurate and monitor the temperature in real time through the temperature sensor to prevent overheating, use automated equipment to ensure the weld is continuous and uniform, and adjust the welding speed and power according to the heat distribution. After welding is completed, keep the workpiece fixed to prevent concentricity deviation caused by welding stress;

[0095] The step S4 can be refined as follows:

[0096] S41, start the welding equipment and start high-precision welding operation to ensure the accuracy of the welding path;

[0097] S42. Use temperature sensors and automatic adjustment systems to monitor welding temperature in real time to prevent local overheating;

[0098] S43. Use automated welding equipment to ensure weld continuity and prevent welds from being too wide or too narrow;

[0099] S44. According to the heat distribution of the welding point, adjust the welding speed and power in time to ensure uniform welding;

[0100] S45. After welding is completed, the workpiece is kept fixed in the fixture to avoid concentricity deviation caused by welding stress;

[0101] This embodiment: In this step, start the equipment for precision welding, ensure the path is accurate, and monitor the welding temperature in real time through the temperature sensor to prevent overheating. Use automated equipment to ensure that the weld is continuous and uniform, and dynamically adjust the welding speed and power according to the heat distribution. After welding is completed, keep the workpiece fixed to avoid concentricity deviation due to welding stress.

[0102] S5. After welding is completed, gradually cool the welded parts to reduce the influence of thermal stress. Then, check the surface quality of the weld to ensure that there are no cracks or pores. Use laser equipment to preliminarily detect the concentricity of the welded parts and record the relevant data. According to the test results, if necessary, perform secondary heat treatment or correction operations on the local area. Finally, clean the surface of the welded parts to remove impurities and residues.

[0103] The step S5 can be refined as follows:

[0104] S51. After welding, gradually cool the weldment and use a controlled cooling system to reduce the effects of thermal stress;

[0105] S52. Check the surface quality of the weld to ensure that there are no cracks, pores or other surface defects in the weld;

[0106] S53. Use laser detection equipment to preliminarily detect the concentricity of the welded parts and record the relevant deviation data;

[0107] S54. Perform secondary heat treatment or correction operation on the local area if necessary according to the test results;

[0108] S55. Clean the surface of the weldment and remove impurities or residues that may be generated during the welding process;

[0109] This embodiment: In this step, the weld is gradually cooled to reduce thermal stress, and then the surface quality of the weld is checked to ensure that there are no cracks or pores. The concentricity is initially checked using a laser device and the data is recorded. If the test results show deviations, secondary heat treatment or correction operations are performed if necessary. Finally, the surface of the weld is cleaned to remove impurities and residues generated during the welding process to ensure surface finish.

[0110] S6. Use high-precision equipment to shape the welded parts and correct possible minor deformations. Then, check the geometric dimensions and concentricity to ensure that they meet the design standards. Use grinding and polishing processes to treat the surface and remove excess materials. If concentricity deviation is found, make fine adjustments to ensure that the accuracy meets the requirements. Finally, complete comprehensive quality inspection and record the results.

[0111] The step S6 can be refined as follows:

[0112] S61. Use high-precision shaping equipment to shape the welded parts and correct the slight deformation that may occur during the welding process;

[0113] S62. Check the geometric dimensions and concentricity of the welded parts after shaping to ensure that the accuracy meets the requirements;

[0114] S63. Use precision grinding and polishing technology to process the surface of the welded parts and remove excess material;

[0115] S64. If concentricity deviation is found, make fine adjustments to ensure that the weldment meets the designed concentricity requirements;

[0116] S65. Finally, conduct a comprehensive quality inspection and record the measurement results and finishing conditions of each workpiece;

[0117] This example: In this step, high-precision equipment is used to correct the slight deformation that may occur during the welding process. Then the geometric dimensions and concentricity are checked to ensure that they meet the design standards. The surface of the weld is treated by precision grinding and polishing to remove excess material. If concentricity deviation is found, fine-tuning is performed to ensure that the accuracy meets the requirements. Finally, a comprehensive quality inspection is carried out and the results are recorded to ensure that the weld meets various standard requirements.

[0118] S7. Perform a final concentricity test on the welded parts to ensure that they are within the design tolerance range. Then, perform a weld strength test to ensure that their mechanical strength meets the requirements. Check the surface quality to ensure that there are no defects or cracks. Then perform a durability test to simulate the stress conditions in the working environment and verify the durability of the welded parts. Finally, the welded parts that pass the inspection are marked and packaged, ready for shipment or commissioning.

[0119] The step S76 can be broken down into:

[0120] S71. Use a high-precision concentricity detector to conduct final inspection on welded parts to ensure that the concentricity is within the design tolerance range;

[0121] S72. Conduct weld strength test to ensure that the welded parts have sufficient mechanical strength under working conditions;

[0122] S73. Check the surface quality of welded parts to ensure there are no obvious flaws, cracks or welding residues;

[0123] S74. Conduct durability tests to simulate stress conditions in actual working environments and detect the durability of welded parts;

[0124] S75. The welded parts that have passed the final inspection are marked, packaged, and prepared to be shipped or put into use;

[0125] This embodiment: In this step, a high-precision concentricity tester is first used to ensure that the weldment meets the design tolerance range. Next, the weld strength test is performed to ensure that it has sufficient mechanical strength. The surface of the weldment is then checked to confirm that there are no flaws or cracks, and a durability test is performed to simulate the stress conditions in the actual working environment to verify the durability of the weldment. Finally, the weldment that passes the inspection will be marked and packaged, ready for shipment or put into use.

[0126] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. The replacement may be a replacement of a part of the structure, device, method step, or a complete technical solution. Any equivalent replacement or change according to the technical solution and the inventive concept of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A high-precision gear shaft high concentricity welding method, characterized in that: The following steps are involved: S1. During the material preparation process, select suitable high-strength metal materials to ensure that they are free of defects and meet the design requirements, cut and clean the materials, remove impurities, and then mark and classify the materials to ensure that they are not damaged or deformed during subsequent processing; S2. During the welding preparation stage, use a high-precision fixture to fix the gear shaft and adjust the concentricity to ensure accurate positioning. Then, lock the fixture to prevent the workpiece from moving during the welding process. Finally, perform secondary calibration and concentricity testing to ensure that the preparation before welding is sufficient. S3. During the welding process, select the appropriate welding process according to the characteristics of the gear shaft, such as laser welding or resistance welding, and adjust the power and speed of the equipment to ensure the stability of welding. Pre-treat the welding area to ensure that the surface is clean and free of impurities, and use protective gas or coating to prevent oxidation. Finally, set up a cooling system to ensure that the temperature is reasonably controlled after welding to avoid deformation caused by thermal stress; S4. During the welding process, start the equipment for precision welding, ensure the path is accurate and monitor the temperature in real time through the temperature sensor to prevent overheating, use automated equipment to ensure the weld is continuous and uniform, and adjust the welding speed and power according to the heat distribution. After welding is completed, keep the workpiece fixed to prevent concentricity deviation caused by welding stress; S5. After welding is completed, gradually cool the welded parts to reduce the influence of thermal stress. Then, check the surface quality of the weld to ensure that there are no cracks or pores. Use laser equipment to preliminarily detect the concentricity of the welded parts and record the relevant data. According to the test results, if necessary, perform secondary heat treatment or correction operations on the local area. Finally, clean the surface of the welded parts to remove impurities and residues. S6. Use high-precision equipment to shape the welded parts and correct possible minor deformations. Then, check the geometric dimensions and concentricity to ensure that they meet the design standards. Use grinding and polishing processes to treat the surface and remove excess materials. If concentricity deviation is found, make fine adjustments to ensure that the accuracy meets the requirements. Finally, complete comprehensive quality inspection and record the results. S7. Perform a final concentricity test on the welded parts to ensure that they are within the design tolerance range. Then, perform a weld strength test to ensure that their mechanical strength meets the requirements. Check the surface quality to ensure that there are no defects or cracks. Then perform a durability test to simulate the stress conditions in the working environment and verify the durability of the welded parts. Finally, the welded parts that pass the inspection are marked and packaged, ready for shipment or commissioning.

2. The high-precision gear shaft high concentricity welding method according to claim 1 is characterized in that: The step S1 can be refined as follows: S11. Select high-strength metal materials, such as alloy steel or titanium alloy, to ensure that the materials have excellent mechanical properties; S12. Check the surface finish and roundness of the material to ensure that there are no cracks, dents or other defects on the surface of the material; S13. Cut the material into required size according to design requirements and check the flatness of the cut surface; S14. Clean the cut materials to remove surface impurities, oxide layers and oil stains; S15. Mark and classify the prepared materials and place them according to the process requirements to prevent deformation or damage of the materials.

3. The high concentricity welding method for high-precision gear shaft according to claim 1, characterized in that The step S2 can be refined as follows: S21. Use high-precision fixtures to fix the gear shaft and accessories at the welding station to ensure that their center lines are aligned; S22. Precision adjust the fixture and use laser measuring equipment to detect concentricity to ensure accurate positioning; S23, lock the fixture to ensure that the workpiece does not move or loosen during the welding process; S24. Perform secondary positioning and calibration on the gear shaft through mechanical or automated devices to ensure that the concentricity before welding meets the process standards; S25. Perform concentricity test again and enter welding process only after confirmation that everything is ready.

4. The high-precision gear shaft high concentricity welding method according to claim 1, characterized in that: The step S3 can be refined as follows: S31. Select a suitable welding process according to the characteristics of the material and the gear shaft, preferably laser welding or resistance welding; S32, adjusting the power, welding speed and welding current of the welding equipment to ensure the stability and concentricity of the welding; S33. Perform pretreatment on the welding area, such as polishing and cleaning, to ensure that the welding surface is free of impurities and oxides; S34. Select appropriate shielding gas or protective coating to prevent oxidation or contamination of materials during welding; S35. Set the cooling system parameters to ensure that the temperature after welding is controlled within the appropriate range to prevent deformation caused by thermal stress.

5. The high-precision gear shaft high concentricity welding method according to claim 1, characterized in that: The step S4 can be refined as follows: S41, start the welding equipment and start high-precision welding operation to ensure the accuracy of the welding path; S42. Use temperature sensors and automatic adjustment systems to monitor welding temperature in real time to prevent local overheating; S43. Use automated welding equipment to ensure weld continuity and prevent welds from being too wide or too narrow; S44. According to the heat distribution of the welding point, adjust the welding speed and power in time to ensure uniform welding; S45. After welding is completed, continue to keep the workpiece fixed in the fixture to avoid concentricity deviation caused by welding stress.

6. The high-precision gear shaft high concentricity welding method according to claim 1, characterized in that: The step S5 can be refined as follows: S51. After welding, gradually cool the weldment and use a controlled cooling system to reduce the effects of thermal stress; S52. Check the surface quality of the weld to ensure that there are no cracks, pores or other surface defects in the weld; S53. Use laser detection equipment to preliminarily detect the concentricity of the welded parts and record the relevant deviation data; S54. Perform secondary heat treatment or correction operation on the local area if necessary according to the test results; S55. Clean the surface of the weldment and remove impurities or residues that may be generated during the welding process.

7. The high-precision gear shaft high concentricity welding method according to claim 1, characterized in that: The step S6 can be refined as follows: S61. Use high-precision shaping equipment to shape the welded parts and correct the slight deformation that may occur during the welding process; S62. Check the geometric dimensions and concentricity of the welded parts after shaping to ensure that the accuracy meets the requirements; S63. Use precision grinding and polishing technology to process the surface of the welded parts and remove excess material; S64. If concentricity deviation is found, make fine adjustments to ensure that the weldment meets the designed concentricity requirements; S65. Finally, conduct a comprehensive quality inspection and record the measurement results and finishing status of each workpiece.

8. The high-precision gear shaft high concentricity welding method according to claim 1, characterized in that: The step S76 can be broken down into: S71. Use a high-precision concentricity detector to conduct final inspection on welded parts to ensure that the concentricity is within the design tolerance range; S72. Conduct weld strength test to ensure that the welded parts have sufficient mechanical strength under working conditions; S73. Check the surface quality of welded parts to ensure there are no obvious flaws, cracks or welding residues; S74. Conduct durability tests to simulate stress conditions in actual working environments and detect the durability of welded parts; S75. Welded parts that pass the final inspection are marked, packaged, and prepared for shipment or use.

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