Screw tooth surface polishing device and polishing method

Abstract

The invention discloses a screw tooth surface polishing device and a polishing method. The screw tooth surface polishing device comprises a main beam, a cross beam device, a rotating device, a reinforcement device, a power device and a polishing device. The top of the main beam is connected to the cross beam device, one end of the power device is connected to the cross beam device, and the other end is connected to the bottom of the main beam. The main beam runs through the rotating device and the rotating device is arranged between the cross beam device and the power device. The reinforcement device is connected to the rotating device, and the entire device is installed on a processing lathe through the reinforcement device. The invention provides a one-way thrust ball bearing and a pressure ring on the rotating seat to achieve angle adjustment of the main beam. The top of the main beam is connected to the polishing device to adjust the polishing angle, thereby polishing screw tooth surfaces at different angles and improving polishing efficiency. A main body adjustment plate, a first screw and a first bolt are provided on the cross beam body to achieve the up and down movement of the cross beam body along the main beam, and can adapt to polishing devices of different specifications, with high applicability and reduced production costs.

Description

Technical Field

[0001] The invention belongs to the technical field of screw processing, and more specifically, relates to a screw tooth surface polishing device and a polishing method. Background Art

[0002] As a common transmission structural component in daily life, screws are widely used in the machinery industry. In the design and manufacturing process of screws, in addition to key parameters such as material and pitch, the roughness of the screw tooth surface also plays a key role. As the main load-bearing surface, the surface state of the screw tooth surface will directly affect the friction characteristics and load-bearing capacity of the screw during operation. If the roughness of the screw tooth surface is too low, it may increase the friction resistance during the transmission process, thereby significantly reducing the transmission efficiency. This will not only increase energy consumption, but may also cause overheating and failure of the equipment, and even affect the molding quality of the final product. In addition, rough screw tooth surfaces will accelerate the wear of parts, shorten the service life of the equipment, and increase the cost of maintenance and replacement.

[0003] At present, many manufacturers mainly rely on processing machine tools or manual grinding to post-process the screw tooth surface. However, as the service life of the processing machine tools gradually increases, the accuracy and stability of the equipment are often affected, and the wear of the tool will also lead to a decrease in the processing effect. This makes it difficult for the roughness of the screw tooth surface to meet the expected standard in some cases, thus affecting the overall performance of the product. On the other hand, although manual grinding and polishing can improve the surface quality of the screw to a certain extent, manual grinding still has the problems of low efficiency and long cycle.

[0004] Patent number: 202021532043.1, named: Utility model patent for polishing abrasive belt wheel device, by setting the first abrasive belt wheel component, the second abrasive belt wheel component and the abrasive belt component, the first abrasive belt wheel component is the grinding contact point, the first abrasive belt wheel component is the driving wheel in the abrasive belt transmission structure, and the second abrasive belt wheel component is the driven wheel in the abrasive belt transmission structure. The main problem solved is that the existing abrasive belt machine is easy to slip during operation, the polishing effect is poor, and the wheel repair work of the aluminum core rubber wheel is corrected, but the device cannot adjust the angle to polish the tooth surface at different angles.

[0005] Patent number: 201621479959.9, named: A utility model patent for a fully automatic CNC polishing machine. By setting a machine base device, a sanding belt adjustment device, a lifting device, a passive wheel device and a polishing platform device, a rotating swing fixture device is used to rotate the rotating shaft to contact the sanding belt. It mainly solves the problem of grinding the chamfered surface of the workpiece section and multi-faceted grinding of the workpiece. It is not a processing device only for the screw tooth surface, and the overall structure is complex, the processing time is long, and the cost is high. Summary of the invention

[0006] In view of the problem that the existing screw polishing machine cannot adjust the polishing angle and has low polishing efficiency and high cost, the present invention provides a screw tooth surface polishing device and polishing method. By providing a one-way thrust ball bearing and a pressure ring on the rotating seat, the angle adjustment of the main beam is achieved. The top of the main beam is connected to the polishing device, which can adjust the polishing angle, and then polish the screw tooth surface at different angles to improve the polishing efficiency. A fixed seat and a main beam limit plate are also provided to fix the position of the main beam. A main body adjustment plate, a first screw and a first bolt are provided on the crossbeam body to achieve the up and down movement of the crossbeam body along the main beam. It can adapt to polishing devices of different specifications, has high applicability, and reduces production costs. Finally, it is only necessary to replace the screw tooth surface processing tool with a polishing device fixed on the tool holder of the processing lathe. The tooth surface roughness can be greatly improved through the polishing device, which effectively solves the problem that the processing surface roughness does not meet the use standard due to insufficient machine tool precision.

[0007] To achieve the above-mentioned purpose, according to a first aspect of the present invention, there is provided a screw tooth surface polishing device, comprising a main beam, a cross beam device, a rotating device, a reinforcement device, a power device and a polishing device, wherein the top of the main beam is connected to the cross beam device, one end of the power device is connected to the cross beam device, and the other end is connected to the bottom of the main beam, the main beam passes through the rotating device and the rotating device is arranged between the cross beam device and the power device, and the reinforcement device is connected to the rotating device; One side of the crossbeam device is connected to the top of the polishing device through a power device, and the crossbeam device can move up and down along the main beam to adapt to polishing devices of different specifications; The rotating device is used to adjust the angle of the main beam, and is used to polish different angles of the screw tooth surface to be processed; The reinforcement device is used to fix the position of the main beam; The power device is used to provide power for the polishing device; The polishing device is arranged on one side of the main beam and is used for polishing the threaded surface of the screw to be processed.

[0008] Preferably, the rotating device includes a rotating seat and a one-way thrust ball bearing, the rotating seat is arranged on the one-way thrust ball bearing, and the outer circle of the rotating seat is matched and connected with the inner diameter of the one-way thrust ball bearing, the main beam passes through the rotating seat and the one-way thrust ball bearing in sequence, and the one-way thrust ball bearing is connected to the reinforcement device.

[0009] Preferably, the reinforcement device includes a bearing seat, a fixed seat and a pressure ring, the main beam passes through the pressure ring, the bearing seat and the fixed seat in sequence, the one-way thrust ball bearing is connected to the bearing seat, the pressure ring is sleeved on the outside of the one-way thrust ball bearing and connected to the top of the bearing seat, the bottom of the bearing seat is connected to the fixed seat, positioning plates are provided on both sides of the top of the fixed seat, and the positioning plates are connected to both sides of the bearing seat, and the fixed seat is connected to a processing lathe.

[0010] Preferably, a limiting device is also provided, which includes a main beam limiting plate, a limiting screw, a guide rod, a guide rod positioning seat and an adjusting screw. The main beam limiting plate passes through the main beam horizontally and is connected to the rotating seat on both sides through limiting screws. The main beam limiting plate is used to prevent the main beam from moving axially; the guide rod passes through the bearing seat and the fixed seat, the guide rod positioning seats are arranged at both ends of the guide rod for fixing the guide rod, the adjusting screws are arranged on both sides of the fixed seat and one end can support the bearing seat, and the adjusting screws are used to adjust the bearing seat.

[0011] Preferably, the beam device includes a beam body, a beam adjustment plate, a first bolt and a first nut. The beam adjustment plate is arranged above the beam body and is connected by the first bolt. The first nut is connected with the first bolt. The top of the main beam passes through the beam body, and the side of the beam body is connected to the polishing device. By adjusting the first nut, the beam body can be moved up and down along the main beam.

[0012] Preferably, the power device includes a motor, a positioning key, a driven shaft and a deep groove ball bearing. The motor is connected to the bottom of the main beam. The output end of the motor is connected to one end of the polishing device through the positioning key. The other end of the polishing device is connected to the driven shaft. The driven shaft transversely passes through the beam body. There are two deep groove ball bearings and they are arranged inside the beam body to ensure the rotation of the driven shaft.

[0013] Preferably, it also includes a bearing cover, a round nut, a welding platform, a motor shaft end cover and a driven shaft cover plate. The driven shaft end is sleeved with a round nut, and the driven shaft end is sleeved with a round nut for locking the driven shaft and preventing its axial movement. There are two bearing covers and they are respectively arranged on both sides of the beam body for positioning the deep groove ball bearing. The top of the polishing device is sleeved on the driven shaft and fixed by the driven shaft cover plate. The welding platform is arranged at the bottom of the main beam, the motor is connected to the welding platform, and the output end of the motor is connected to the bottom of the polishing device, and the connection between the output end of the motor and the polishing device is fixed by the motor shaft end cover.

[0014] Preferably, the polishing device comprises a driving wheel, a driven wheel and a polishing belt, the driving wheel is connected to the output end of the motor, the driven wheel is connected to the driven shaft, and the polishing belt is sleeved on the driving wheel and the driven wheel.

[0015] Preferably, the driven wheel is a rubber-coated abrasive belt wheel, the motor is a three-phase asynchronous motor, the first bolt is a hexagonal head bolt, and the first nut is a hexagonal thin nut.

[0016] To achieve the above object, according to a second aspect of the present invention, a screw tooth surface polishing device and a polishing method are provided, which are implemented by using the above-mentioned screw tooth surface polishing device. The polishing method comprises the following steps: S1. Fix the entire polishing device on the tool holder of the processing lathe through a fixed seat, and move the tool holder so that the polishing belt is close to the thread surface of the screw to be processed; S2, start the motor, the motor drives the driving wheel to rotate, and then drives the polishing belt and the driven wheel to rotate, and the polishing belt starts to polish the thread surface of the screw to be processed; S3, start the processing lathe, ensure that the processing lathe rotates one circle, and the tool holder feeds one pitch at the same time, ensuring that the tool holder moves accurately one pitch distance along the axis direction of the workpiece every time the spindle of the processing lathe completes a complete 360-degree rotation; S4. When it is necessary to polish the tooth surfaces of the screw to be processed at different angles, loosen the fixings on the pressure ring, rotate the main beam through the one-way thrust bearing, and then adjust the angle of the polishing belt to ±30°; S5. The adjusted polishing belt is placed close to the tooth surface of the screw to be processed, and the S2 operation is repeated again to complete the polishing of different tooth surfaces.

[0017] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art: the polishing angle cannot be adjusted, the polishing efficiency is low and the cost is high. 1. A screw tooth surface polishing device and a polishing method of the present invention, wherein the screw tooth surface polishing device realizes angle adjustment of the main beam by providing a one-way thrust ball bearing and a pressure ring on a rotating seat, and the top of the main beam is connected to the polishing device, which can adjust the polishing angle, thereby polishing screw tooth surfaces at different angles and improving polishing efficiency.

[0018] 2. The present invention fixes the position of the main beam by setting a fixed seat and a main beam limit plate. A main body adjustment plate, a first screw and a first bolt are provided on the crossbeam body to achieve the up and down movement of the crossbeam body along the main beam. It can adapt to polishing devices of different specifications, has high applicability and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a stereoscopic diagram of the screw rod tooth surface polishing and grinding device of the present invention.

[0020] Figure 2 This is an exploded view of the structure of the screw tooth surface polishing and grinding device of the present invention.

[0021] Figure 3 It is a side view of the screw rod tooth surface polishing and grinding device of the present invention.

[0022] Figure 4 for Figure 3 Cross-sectional view at point A in the middle.

[0023] Figure 5 for Figure 3 Cross-section view at point B.

[0024] Figure 6 for Figure 3 Cross-section view at point C in the middle.

[0025] Figure 7 It is a top view of the screw rod tooth surface polishing and grinding device of the present invention.

[0026] Figure 8 It is a schematic diagram of the connection between the screw rod tooth surface polishing and grinding device of the present invention and a processing lathe.

[0027] Fig. 9 This is a flow chart of the screw tooth surface polishing method.

[0028] In the figure: 1. main beam; 2. rotating seat; 3. one-way thrust ball bearing; 4. bearing seat; 5. fixed seat; 6. pressure ring; 7. main beam limit plate; 8. limit screw; 9. guide rod; 10. guide rod positioning seat; 11. adjusting screw; 12. crossbeam body; 13. crossbeam adjustment plate; 14. first bolt; 15. first nut; 16. motor; 17. positioning key; 18. driven shaft; 19. deep groove ball bearing; 20. bearing cover; 21. round nut; 22. welding platform; 23. motor shaft end cover; 24. driven shaft cover plate; 25. driving wheel; 26. driven wheel; 27. polishing belt; 28. stop washer; 29. ​​bearing sleeve; 30. processing lathe; 31. screw to be processed; 32. second bolt. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] Depend on Figures 1 to 8As shown, a screw tooth surface polishing device includes a main beam 1, a cross beam device, a rotating device, a reinforcement device, a power device and a polishing device, wherein the main beam 1 is a rectangular long rod, the top of the main beam 1 is connected to the cross beam device, one end of the power device is connected to the cross beam device, and the other end is connected to the bottom of the main beam 1, the main beam 1 passes through the rotating device and the rotating device is arranged between the cross beam device and the power device, the reinforcement device is connected to the rotating device, one side of the cross beam device is connected to the top of the polishing device through the power device, and the cross beam device can move up and down along the main beam 1 to adapt to polishing devices of different specifications.

[0031] The crossbeam device includes a crossbeam body 12, a crossbeam adjustment plate 13, a first bolt 14 and a first nut 15. The crossbeam adjustment plate 13 is arranged above the crossbeam body 12 and is connected by the first bolt 14. The first nut 15 is connected with the first bolt 14 in cooperation. The crossbeam body 12 is provided with a rectangular through hole, and the top of the main beam 1 passes through the crossbeam body 12 through the rectangular through hole. There is a small gap between the crossbeam body 12 and the main beam 1. Three threaded holes are evenly provided on the crossbeam adjustment plate 13. The crossbeam adjustment plate 13 passes through the threaded hole in the middle by a screw and is connected with the corresponding threaded hole provided on the top of the main beam 1. There are two first bolts 14 and they are connected with the crossbeam body 1 in cooperation with the other two threaded holes. The first bolt 14 is a hexagonal head bolt, and the first nut 15 is a hexagonal thin nut. By screwing the first bolt, the crossbeam body 12 can slide up and down along the main beam 1, and then the position of the crossbeam body 12 can be adjusted to adapt to polishing devices of different specifications and sizes.

[0032] The power device includes a motor 16, a positioning key 17, a driven shaft 18, a deep groove ball bearing 19, a bearing cover 20, a round nut 21, a welding platform 22, a motor shaft end cover 23 and a driven shaft cover plate 24. The bottom of the main beam 1 is connected to the welding platform 22, the motor 16 is fixedly connected to the welding platform 22, the output end of the motor 16 is connected to the bottom of the polishing device through the positioning key 17, the output end of the motor 16 is connected to the motor shaft end cover 23 by screws, and the motor shaft end cover 23 is used to fix the connection between the output end of the motor 16 and the polishing device to prevent the polishing device from withdrawing from the output end of the motor 16. The crossbeam body 12 is provided with a circular hole on the other side through which the main beam 1 passes. The driven shaft 18 passes through the circular hole. A bearing sleeve 29 is sleeved on the outside of the driven shaft 18. The length of the bearing sleeve 29 is consistent with the circular hole. There are two deep groove ball bearings 19 arranged in the circular hole. There are two bearing caps 20 arranged on both sides of the circular hole by screws, which are used to press the deep groove ball bearings 19 into the bearing sleeve 29. Then, the bearing sleeve 29 cooperates with the deep groove ball bearings 19 to ensure the stability of the driven shaft 18. The end of the driven shaft 18 close to the polishing device is connected to the polishing device and fixed by the driven shaft cover plate 24. The end away from the polishing device is locked by a round nut 21. The round nut 21 is used for axial positioning and locking of the driven shaft 18. The stop washer 28 is arranged at the connection between the round nut 21 and the crossbeam body 12 to ensure that the round nut 21 will not loosen due to vibration or other external forces. The motor 16 is a three-phase asynchronous motor with adjustable speed, which can make the device compatible with rough polishing and fine polishing.

[0033] When the driven shaft 18 rotates, the rolling contact between the inner and outer rings of the deep groove ball bearing 19 provides low-friction radial support, allowing the driven shaft 18 to rotate freely with almost no friction while bearing the radial force transmitted from the polishing device. The round nut 21 and the bearing cover 20 work together to ensure that the driven shaft 18 does not undergo unnecessary axial displacement and maintains its position accuracy relative to the beam body 12. At the same time, the deep groove ball bearing 19 has a certain self-aligning ability. Even if there is a slight misalignment between the driven shaft 18 and the beam body 12, the bearing can automatically adjust the internal structure to ensure smooth operation.

[0034] The polishing device includes a driving wheel 25, a driven wheel 26 and a polishing belt 27. The driving wheel 25 is connected to the output end of the motor 16, the driven wheel 26 is connected to the driven shaft 18, and the driven shaft cover 24 is used to fix the connection between the driven wheel 26 and the driven shaft 18. The driven wheel 26 is a rubber-coated sand belt wheel. The driving wheel 25 is provided with an annular groove. The polishing belt 27 is sleeved in the annular groove of the driving wheel 25 and on the driven wheel 26.

[0035] When the crossbeam body 12 moves along the main beam 1, the center distance between the driving wheel 25 and the driven wheel 26 is reduced, which facilitates the disassembly and replacement of the polishing belt 27. The polishing belt 27 of the corresponding grade can also be selected according to the roughness requirements of the parts to be processed, thereby improving processing efficiency and avoiding cost waste.

[0036] The rotating device includes a rotating seat 2 and a one-way thrust ball bearing 3. A rectangular through hole is provided at the center of the rotating seat 2. The main beam 1 passes through the rectangular through hole of the rotating seat 2. The rotating seat 2 is arranged on the one-way thrust ball bearing 3, and the outer circle of the rotating seat 2 is positioned with the inner diameter stop of the one-way thrust ball bearing 3. The main beam 1 passes through the rotating seat 2 and the one-way thrust ball bearing 3 in sequence, and the one-way thrust ball bearing 3 is connected to the reinforcement device.

[0037] The reinforcement device includes a bearing seat 4, a fixed seat 5 and a pressure ring 6. The main beam 1 passes through the pressure ring 6, the bearing seat 4 and the fixed seat 5 in sequence. The rotating seat 2 is arranged above the bearing seat 4. A sunken step area is provided inside the bearing seat 4. The area is provided with a stopper that cooperates with the one-way thrust ball bearing 3. The pressure ring 6 is sleeved on the outside of the one-way thrust ball bearing 3 and is connected to the top of the bearing seat 4 through a second screw 32. The bottom of the bearing seat 4 is connected to the fixed seat 5. Positioning plates are provided on both sides of the top of the fixed seat 5, and the positioning plates are connected to both sides of the bearing seat 4. The fixed seat 5 is fixedly connected to the processing lathe 30.

[0038] A limiting device is also provided, which includes a main beam limiting plate 7, a limiting screw 8, a guide rod 9, a guide rod positioning seat 10, an adjusting screw 11 and a second screw 32. A rectangular hole is opened in the middle of the main beam 1. The main beam limit plate 7 is horizontally passed through the rectangular hole opened in the main beam 1, and the two sides are connected to the rotating seat 2 by limit screws 8. The main beam limit plate 7 is used to prevent the main beam 1 from moving axially; the guide rod 9 is inserted into the circular hole on the side of the fixed seat 5 and then passes through the bearing seat 4. The bearing seat 4 only moves along the guide rod 9 in the fixed seat 5. The adjusting screws 11 are inserted into the threaded holes on both sides of the fixed seat 5. The bearing seat 4 is supported by rotating the adjusting screws 11 to adjust the bearing seat 4. The guide rod positioning seat 10 is fixed to the two ends of the guide rod 9 by screws, which is used to fix the position of the guide rod 9 and prevent the guide rod 9 from retreating.

[0039] When assembling the rotating device, the reinforcement device and the limit device, first let the main beam 1 pass through the rectangular hole of the rotating seat 2, and the main beam limit plate 7 is installed on both sides of the main beam 1. The angle of the main beam 1 is slowly rotated by pushing the one-way thrust ball bearing 3, and then the angle of the polishing belt 27 is adjusted. The adjustment angle is ±30°. After the angle of the main beam 1 is adjusted, the pressure ring 6 is fixed to the bearing seat 4 by the second screw 32, and the rotating seat 2 is also fixed on the bearing seat 4. Then they are placed together on the fixed seat 5, and the guide rod 9 and the adjusting screw 11 are installed to complete the assembly.

[0040] When the one-way thrust ball bearing 3 is placed in the countersunk platform of the bearing seat 5, its outer circle edge will fit with the stop of the countersunk platform, ensuring that the bearing seat 5 is correctly installed in place. At the same time, it also limits the axial and radial freedom of the bearing seat 5, ensuring that the main beam 1, the main beam limit plate 7 and the rotating seat 2 can rotate smoothly on the one-way thrust ball bearing 3 as a whole.

[0041] Depend on Fig. 9 As shown, a screw tooth surface polishing device and a polishing method are implemented by using the above-mentioned screw tooth surface polishing device. The polishing method includes the following steps: S1, fix the entire polishing device on the tool holder of the processing lathe 30 through the fixing seat 5, and move the tool holder so that the polishing belt 27 is close to the tooth surface of the screw 31 to be processed; S2, start the motor 23, the motor 23 drives the driving wheel 25 to rotate, and then drives the polishing belt 27 and the driven wheel 26 to rotate, and the polishing belt 27 starts to polish the tooth surface of the screw 31 to be processed; S3, start the processing lathe 30, ensure that the processing lathe 30 rotates one circle, and the tool holder feeds one pitch at the same time, and ensure that the tool holder accurately moves one pitch distance along the axis direction of the workpiece every time the main shaft of the processing lathe 30 completes a complete 360-degree rotation; S4. When it is necessary to polish the tooth surfaces of the screw rod 31 to be processed at different angles, loosen the second screw 32 on the pressure ring 6, rotate the main beam 1 through the one-way thrust bearing 3, and then adjust the angle of the polishing belt 27 to ±30°; S5. The adjusted polishing belt 27 is placed close to the tooth surface of the screw rod 31 to be processed, and the operation S2 is repeated again to complete the polishing of different tooth surfaces.

[0042] The present invention discloses a screw tooth surface polishing device and a polishing method. The screw tooth surface polishing device is provided with a one-way thrust ball bearing and a pressure ring on a rotating seat to achieve angle adjustment of the main beam. The top of the main beam is connected to the polishing device, which can adjust the polishing angle, thereby polishing the screw tooth surface at different angles to improve the polishing efficiency. A fixed seat and a main beam limit plate are also provided to fix the position of the main beam. A main body adjustment plate, a first screw and a first bolt are provided on the crossbeam body to achieve the up and down movement of the crossbeam body along the main beam. The crossbeam body can adapt to polishing devices of different specifications, has high applicability, and reduces production costs. Finally, it is only necessary to replace the screw tooth surface processing tool with a polishing device fixed on the tool holder of the processing lathe. The tooth surface roughness can be greatly improved by the polishing device, which effectively solves the problem that the processing surface roughness does not meet the use standard due to insufficient machine tool precision.

[0043] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A screw tooth surface polishing device, characterized in that: It comprises a main beam (1), a cross beam device, a rotating device, a reinforcement device, a power device and a polishing device, wherein the top of the main beam (1) is connected to the cross beam device, one end of the power device is connected to the cross beam device, and the other end is connected to the bottom of the main beam (1), the main beam (1) passes through the rotating device and the rotating device is arranged between the cross beam device and the power device, and the reinforcement device is connected to the rotating device; One side of the crossbeam device is connected to the top of the polishing device via a power device, and the crossbeam device can move up and down along the main beam (1) to accommodate polishing devices of different specifications; The rotating device is used to adjust the angle of the main beam (1) and is used to polish different angles of the tooth surface of the screw rod (31) to be processed; The reinforcement device is used to fix the position of the main beam (1); The power device is used to provide power for the polishing device; The polishing device is arranged on one side of the main beam (1) and is used for polishing the tooth surface of the screw rod (31) to be processed.

2. A screw rod tooth surface polishing device according to claim 1, characterized in that: The rotating device comprises a rotating seat (2) and a one-way thrust ball bearing (3); the rotating seat (2) is arranged on the one-way thrust ball bearing (3), and the outer circle of the rotating seat (2) is matched and connected with the inner diameter of the one-way thrust ball bearing (3); the main beam (1) passes through the rotating seat (2) and the one-way thrust ball bearing (3) in sequence; and the one-way thrust ball bearing (3) is connected to the reinforcement device.

3. A screw rod tooth surface polishing device according to claim 2, characterized in that: The reinforcement device comprises a bearing seat (4), a fixing seat (5) and a pressure ring (6); the main beam (1) passes through the pressure ring (6), the bearing seat (4) and the fixing seat (5) in sequence; the one-way thrust ball bearing (3) is connected to the bearing seat (4); the pressure ring (6) is sleeved on the outside of the one-way thrust ball bearing (3) and connected to the top of the bearing seat (4); the bottom of the bearing seat (4) is connected to the fixing seat (5); positioning plates are provided on both sides of the top of the fixing seat (5), and the positioning plates are connected to both sides of the bearing seat (4); the fixing seat (5) is connected to a processing lathe (30).

4. A screw rod tooth surface polishing device according to claim 3, characterized in that: A limiting device is also provided, the limiting device comprising a main beam limiting plate (7), a limiting screw (8), a guide rod (9), a guide rod positioning seat (10) and an adjusting screw (11); the main beam limiting plate (7) penetrates the main beam (1) transversely and is connected to the rotating seat (2) at both sides via the limiting screws (8); the main beam limiting plate (7) is used to prevent the main beam (1) from axial movement; the guide rod (9) penetrates the bearing seat (4) and the fixing seat (5); the guide rod positioning seat (10) is provided at both ends of the guide rod (9) and is used to fix the guide rod (9); the adjusting screw (11) is provided at both sides of the fixing seat (5) and one end of the fixing seat (5) can support the bearing seat (4); the adjusting screw (11) is used to adjust the bearing seat (4).

5. A screw tooth surface polishing device according to any one of claims 1 to 4, characterized in that: The crossbeam device comprises a crossbeam body (12), a crossbeam adjustment plate (13), a first bolt (14) and a first nut (15); the crossbeam adjustment plate (13) is arranged above the crossbeam body (12) and is connected via the first bolt (14); the first nut (15) is connected in cooperation with the first bolt (14); the top of the main beam (1) passes through the crossbeam body (12); the side of the crossbeam body (12) is connected to the polishing device; and the crossbeam body (12) can be moved up and down along the main beam (1) by adjusting the first nut (15).

6. A screw rod tooth surface polishing device according to claim 5, characterized in that: Said The power device comprises a motor (16), a positioning key (17), a driven shaft (18) and a deep groove ball bearing (19), wherein the motor (16) is arranged at the bottom of the main beam (1), the output end of the motor is connected to one end of the polishing device via the positioning key (17), the other end of the polishing device is connected to the driven shaft (18), the driven shaft (18) passes through the cross beam body (12) transversely, There are two deep groove ball bearings (19) disposed inside the crossbeam body (12) and used to ensure the rotation of the driven shaft (18).

7. A screw rod tooth surface polishing device according to claim 6, characterized in that: It also includes a bearing cover (20), a round nut (21), a welding platform (22), a motor shaft end cover (23) and a driven shaft cover plate (24); the end of the driven shaft (18) is sleeved with a round nut (21) for locking the driven shaft (18) and preventing it from axial movement; there are two bearing covers (20) which are respectively arranged on both sides of the crossbeam body (12) for positioning the deep groove ball bearing (19); the top of the polishing device is sleeved on the driven shaft (18) and fixed by the driven shaft cover plate (24); the welding platform (22) is arranged at the bottom of the main beam (1); the motor (16) is connected to the welding platform (22), and the output end of the motor (16) is connected to the bottom of the polishing device; and the connection between the output end of the motor (16) and the polishing device is fixed by the motor shaft end cover (23).

8. A screw rod tooth surface polishing device according to claim 7, characterized in that: The polishing device comprises a driving wheel (25), a driven wheel (26) and a polishing belt (27); the driving wheel (25) is connected to the output end of the motor (16); the driven wheel (26) is connected to the driven shaft (18); and the polishing belt (27) is sleeved on the driving wheel (25) and the driven wheel (26).

9. A screw rod tooth surface polishing device according to claim 8, characterized in that: The driven wheel (26) is a rubber-coated abrasive belt wheel, the motor (16) is a three-phase asynchronous motor, the first bolt (14) is a hexagonal head bolt, and the first nut (15) is a hexagonal thin nut.

10. A screw tooth surface polishing device and a polishing method, implemented by using a screw tooth surface polishing device according to any one of claims 1 to 9, characterized in that: The polishing method comprises the following steps: S1, fixing the entire polishing device on the tool holder of the processing lathe (30) through the fixing seat (5), and moving the tool holder so that the polishing belt (27) is close to the tooth surface of the screw (31) to be processed; S2, starting the motor (23), the motor (23) drives the driving wheel (25) to rotate, and then drives the polishing belt (27) and the driven wheel (26) to rotate, and the polishing belt (27) starts to polish the tooth surface of the screw (31) to be processed; S3, starting the processing lathe (30), ensuring that the processing lathe (30) rotates one circle, and the tool holder feeds one pitch at the same time, ensuring that the tool holder accurately moves one pitch distance along the axis direction of the workpiece every time the main shaft of the processing lathe (30) completes a complete 360-degree rotation; S4. When it is necessary to polish the tooth surfaces of the screw (31) to be processed at different angles, loosen the fixing piece on the pressure ring (6), rotate the main beam (1) through the one-way thrust bearing (3), and then adjust the angle of the polishing belt (27) to ±30°; S5. The adjusted polishing belt (27) is brought close to the tooth surface of the screw (31) to be processed, and the S2 operation is repeated again to complete the polishing of different tooth surfaces.

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