Uniform-section thin-wall bearing end face grinding device and method

Abstract

The invention provides a uniform-section thin-wall bearing end face grinding device and method, and belongs to the technical field of bearing grinding, the uniform-section thin-wall bearing end face grinding device comprises a rack, a plurality of wandering star wheels, a rotating wheel, a feeding mechanism and an upper grinding disc, the rack is vertically and slidably connected with a moving frame, the upper grinding disc is arranged on the moving frame, and the moving frame is rotatably connected with a rotating ring; a transmission tooth column is arranged on the lower end face of the rotating ring; a lower grinding disc is arranged below the upper grinding disc and comprises an outer grinding disc, an inner grinding disc capable of vertically moving and a plurality of grinding rings, the number of the grinding rings is equal to that of the wandering star wheels, the upper end faces and the lower end faces of the wandering star wheels are fixedly connected with limiting rings, and the outer diameters of the limiting rings are equal to the diameters of the grinding rings. A lower gear is fixedly connected to the lower portion of the polishing ring through a connecting column, and the number of teeth of the lower gear is equal to that of teeth of the wandering star wheel. The rotating wheel is arranged in the center of the inner grinding disc, and the upper end face of the rotating wheel is fixedly connected with an inner tooth column. The bearing grinding device has the effect of improving the bearing grinding quality.

Description

Technical Field

[0001] The invention relates to the technical field of bearing grinding, and in particular to a device and method for grinding the end surface of a uniform-section thin-walled bearing. Background Art

[0002] Uniform cross-section thin-walled bearings refer to thin-walled bearings whose cross-sectional dimensions remain consistent throughout the entire length of the bearing. The ratio between the inner diameter, outer diameter and width of this type of bearing makes the bearing wall relatively thin, thereby ensuring a certain load-bearing capacity while reducing weight and saving space. The bearing end face refers to the two end planes of the bearing, that is, the surface perpendicular to the inner ring and outer ring of the bearing. This surface is usually parallel to the mounting surface of the bearing and plays a role in positioning and supporting.

[0003] In the prior art, a double-end surface grinder is commonly used to grind the end surface of a bearing. The double-end surface grinder is a high-efficiency, high-precision plane processing equipment that can grind two parallel end surfaces of a workpiece at the same time.

[0004] Referring to the Chinese patent document with authorization announcement number CN118106831B, a double-end face grinder and its use method are disclosed, which includes a workbench and an upper grinding disc, a lower grinding disc corresponding to the upper grinding disc is provided on the workbench, a fixing frame is fixedly installed at the top edge of the workbench, and a plurality of carrier discs are evenly distributed on the workbench. The carrier discs are driven by the rotating toothed disc during grinding and rotate on the workbench.

[0005] Regarding the above-mentioned related technologies, when grinding the end face of the bearing, in order to meet the loading requirements, the diameter of the workpiece slot on the carrier is usually larger than the diameter of the bearing, so the position of the bearing in the workpiece slot will change during the grinding process. When the upper and lower grinding discs rotate in opposite directions to grind the bearing, the thickness of the produced bearing is uneven due to processing errors. When the upper grinding disc is pressed down, the upper grinding disc will first contact the thicker bearing. As the upper and lower grinding discs rotate, a gap is generated between the thinner bearing and the upper grinding disc, which will cause the upper end face of the bearing to tilt, resulting in low grinding quality. Summary of the invention

[0006] In view of this, the present invention provides a device and method for grinding the end surface of a uniform cross-section thin-walled bearing, aiming to solve the problem of low bearing grinding quality in the prior art.

[0007] In order to solve the above technical problems, the present invention provides a device and method for grinding the end surface of a uniform cross-section thin-walled bearing.

[0008] The cam is connected with the gear train of the movable frame, and the cam is connected with the gear train of the movable frame in a vertical direction, and the cam is connected with the gear train of the movable frame in a rotatable manner.

[0009] By adopting the above technical scheme, before grinding the bearing, the inner grinding disc is first raised, and the planetary wheel is made to fall into the groove formed by the inner grinding disc and the grinding ring through the limit ring on the planetary wheel, and the transmission gear column is inserted into the tooth gap between the planetary wheel and the lower gear. Then the outer ring is rotated to make the planetary wheel rotate and revolve around the rotating wheel. With the cooperation of the transmission gear column, the lower gear and the planetary wheel, there is no relative movement between the planetary wheel and the grinding ring. Therefore, in the process of grinding the bearing by the upper and lower grinding discs, the top of the bearing can be roughly ground first to make the height of the bearing consistent, so as to improve its stability when grinding the two ends of the bearing later, so as to ensure the verticality of the bearing and improve its grinding quality.

[0010] Optionally, the feeding mechanism includes a feeding plate which is rotatably connected to the frame, a dial for turning the planetary wheel is rotatably connected to the top of the feeding plate, the feeding plate is fixedly connected to the feeding rack, the feeding rack is equipped with an air bag for making the bearing fall individually, the feeding plate is rotatably connected to the feeding wheel, the upper end face of the feeding wheel is fixedly connected to the feeding tooth column, the side of the feeding plate close to the lower grinding plate is rotatably connected to the baffle rod, and the side of the feeding plate close to the lower grinding plate is provided with a feeding port for moving the planetary wheel to the grinding ring, a first rotation source is installed on the frame, the first rotation source can drive the inner grinding plate to rotate through the second rotating rack, and a control plate is vertically slidably connected to the rotating ring.

[0011] By adopting the above technical solution, multiple bearings are arranged vertically on the loading rack, and the bearings are dropped individually by the contraction and expansion of the airbag and fall into the workpiece slot on the planetary wheel. Then the loading wheel is rotated to rotate the planetary wheel to load the bearings, and then the dial is rotated to drive the planetary wheel to rotate and the above steps are repeated to load multiple planetary wheels. Then the upper grinding disc is lowered, and the control plate is moved up, and the transmission gear column is moved up and kept in contact with the control plate to provide space for the planetary wheel to move to the lower grinding disc. As the planetary wheel rotates on the loading disc, when the planetary wheel rotates to the position of the stop rod, under the obstruction of the stop rod, the planetary wheel is moved to the grinding circle in an "∞" shape through the rotation of the inner grinding disc and the loading wheel to complete the loading of the bearing. After the grinding is completed, the planetary wheel can be unloaded by the rotation of the inner grinding disc and the loading wheel, so as to reduce the work intensity of the staff and improve work efficiency.

[0012] Optionally, a first linear drive is installed on the frame, the movable frame is fixedly connected to the driving shaft of the first linear drive, a second rotation source is installed on the movable frame, a driving column is rotatably connected to the movable frame, the second rotation source can drive the driving column to rotate, a support plate is fixedly connected to the bottom of the driving column, the upper grinding disc is fixedly connected to the bottom of the support plate through a support rod, a liquid storage shell is fixedly connected to the side wall of the support plate, and a plurality of cooling pipes that pass through the upper grinding disc are connected to the bottom of the liquid storage shell.

[0013] By adopting the above technical solution, the first linear drive drives the moving frame to move in the vertical direction to realize the movement of the upper grinding disc, and the second rotation source drives the driving column to rotate, and the rotation of the driving column can drive the support plate and the upper grinding disc to rotate to realize the grinding of the upper end surface of the bearing. By setting the liquid storage shell, the temperature of the workpiece and the grinding tool can be reduced during the grinding process to prevent the degradation of material properties or damage to the grinding tool caused by overheating.

[0014] Optionally, a second linear drive is installed at the bottom of the connecting column, and the second linear drive can drive the connecting column and the grinding ring to move in the vertical direction.

[0015] By adopting the above technical solution, after the upper end surface of the bearing is ground, the grinding ring is driven downward by the second linear drive, so that a gap is generated between the grinding ring and the inner grinding disk. The rotation of the outer ring can drive the planetary wheel to rotate, so that the debris and coolant generated by the rough grinding can be thrown out, so as to reduce the impact of the debris on the subsequent fine grinding process and improve the grinding quality of the bearing.

[0016] Optionally, a third linear drive is mounted on the second rotating frame, and the inner grinding disc is fixedly connected to a driving shaft of the third linear drive.

[0017] By adopting the above technical solution, the setting of the third linear drive can drive the inner grinding disc to move in the vertical direction to cooperate with the movement of the planetary wheel and the subsequent grinding process.

[0018] Optionally, a material discharge port is provided on the loading disc, a material discharge wheel is rotatably connected to the loading disc on one side of the material discharge port, and a material discharge gear column is fixedly connected to the upper end surface of the material discharge wheel.

[0019] By adopting the above technical solution, after the bearing is ground, the planetary wheel is rotated onto the loading plate. When the planetary wheel moves to the discharge port, the rotation of the discharge wheel can drive the planetary wheel to rotate. As the planetary wheel rotates, the bearings fall through the discharge port one by one and are collected, thereby improving work efficiency.

[0020] Optionally, a blowing shell is fixedly connected to the loading tray, and a blowing pipe for cleaning the planetary wheel is connected to the top of the blowing shell.

[0021] By adopting the above technical solution, due to the coolant, coolant will be attached to the surface of the planetary wheel. When the planetary wheel moves into the blowing shell, the airflow generated by the blowing pipe can clean the surface of the planetary wheel to facilitate subsequent work.

[0022] In a second aspect, the present invention provides a method for grinding the end surface of a uniform cross-section thin-walled bearing, which is applied to the uniform cross-section thin-walled bearing end surface grinding device described in the first aspect, and the method is: S1, load the bearings to be polished onto the planetary wheel one by one, move the inner polishing disc upward and the upper polishing disc 13 downward, move the loading disc close to the lower polishing disc, turn the dial and move the planetary wheel onto the polishing circle under the action of the stop rod, and turn the rotating wheel to make the planetary wheel correspond to the polishing circle one by one; S2, the transmission gear column is meshed with the planetary wheel and the lower gear, and the upper grinding disc and the lower grinding disc rotate to roughly grind the bearing; S3, the inner grinding disc and the grinding ring are moved downward, and the rotating ring drives the transmission gear column to rotate and throw away the liquid and impurities; S4, move the grinding ring upward and make the outer grinding disc, inner grinding disc and grinding ring be on the same horizontal plane, and perform fine grinding on the bearing; S5, cutting the polished bearings.

[0023] By adopting the above technical solution, the two end surfaces of the bearing are ground by this method, the degree of automation is high, and the grinding quality of the bearing can be improved.

[0024] In summary, compared with the prior art, the present invention includes at least one of the following beneficial technical effects: 1. By first rough grinding the upper end surface of the bearing, the heights of multiple bearings are made consistent, thereby improving the stability of the subsequent grinding of the upper and lower end surfaces of the bearing, thereby improving the grinding quality of the bearing.

[0025] 2. After the rough grinding is completed, the generated debris can be cleaned up to improve the subsequent grinding quality, and the planetary wheel can be cleaned after the grinding is completed to facilitate the continuous grinding of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 It is a structural schematic diagram of the assembly of the planetary wheel and the lower grinding disc according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the grinding disc in an embodiment of the present invention; Figure 4 This is a schematic structural diagram of the planetary wheel and the lower gear according to an embodiment of the present invention; Figure 5 It is a schematic structural diagram of the assembly of the connecting column and the lower gear according to an embodiment of the present invention.

[0027] Description of the accompanying drawings: 1. frame; 11. planetary wheel; 111. limiting ring; 112. workpiece slot; 12. rotating wheel; 121. inner gear column; 122. fourth rotation source; 13. upper grinding disc; 14. moving frame; 15. rotating ring; 151. control panel; 16. transmission gear column; 2. feeding mechanism; 21. feeding disc; 211. feeding port; 22. dial; 23. feeding frame; 24. feeding wheel; 241. feeding gear column; 25. stop rod; 3. lower grinding disc; 31. outer grinding disc; 32 , inner grinding disc; 321, first rotation source; 322, third linear drive; 323, second rotating frame; 33, grinding ring; 331, second linear drive; 34, connecting column; 35, lower gear; 4, first linear drive; 41, second rotation source; 42, driving column; 43, supporting plate; 44, liquid storage shell; 45, cooling pipe; 5, discharge port; 51, discharge wheel; 52, discharge gear column; 6, blowing shell; 61, blowing pipe; 7, third rotation source; 71, first rotating frame. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined with the embodiments of the present invention. Figure 1-Figure 5 , the technical scheme of the embodiment of the present invention is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0029] In a first aspect, the present invention provides a uniform cross-section thin-walled bearing end surface grinding device, which adopts the following technical solution: Reference Figure 1 and Figure 2 The present embodiment provides a uniform cross-section thin-walled bearing end surface grinding device, comprising a frame 1, a planetary wheel 11, a rotating wheel 12, a loading mechanism 2 for loading the bearing, an upper grinding disc 13 for grinding the upper end surface of the bearing, and a lower grinding disc 3 for grinding the lower end surface of the bearing. A plurality of workpiece grooves 112 are provided in a circular array on the planetary wheel 11, and limit rings 111 are fixedly connected to the upper and lower end surfaces of the planetary wheel 11, a plurality of internal tooth columns 121 capable of engaging with the planetary wheel 11 are provided in a circular array on the upper end surface of the rotating wheel 12, a feeding mechanism 2 is arranged on one side of the frame 1, an upper grinding disc 13 and a lower grinding disc 3 are arranged on the other side of the frame 1, a first linear drive 4 is fixedly installed on the frame 1, a driving shaft of the first linear drive 4 is fixedly connected to a moving frame 14, the first linear drive 4 can drive the moving frame 14 to move in a vertical direction, a rotating ring 15 is rotatably connected to the moving frame 14, a plurality of transmission tooth columns 16 are provided in a circular array on the lower end surface of the rotating ring 15, and a reset spring is sleeved on the transmission tooth column 16.

[0030] When the bearing needs to be ground, the bearing is first transported to the workpiece groove 112 on the planetary wheel 11 through the feeding mechanism 2, and then the planetary wheel 11 carrying the bearing is transported to the lower grinding disc 3. Then, the upper and lower end surfaces of the bearing can be ground by the rotation of the upper grinding disc 13 and the lower grinding disc 3 to improve work efficiency.

[0031] Reference Figure 2 , Figure 3 , Figure 4 and Figure 5 The lower grinding disc 3 includes an outer grinding disc 31, an inner grinding disc 32 and a plurality of grinding rings 33. A plurality of spaces for accommodating the grinding rings 33 are formed between the outer grinding disc 31 and the inner grinding disc 32, and the three are collectively in a circular ring shape. The frame 1 is fixedly mounted with a first rotation source 321, a third rotation source 7 and a fourth rotation source 122. The third rotation source 7 is fixedly connected to the first rotating frame 71 through a gear set. The outer grinding disc 31 is fixedly connected to the top of the first rotating frame 71. The first rotation source 321 is fixedly connected to the second rotating frame 323 through a gear set. The second rotating frame 323 is fixedly mounted with a third linear driver 322. The inner grinding disc 32 is fixedly connected to the driving shaft of the third linear driver 322. The rotating frame is mounted with a second linear driver 331. The driving shaft of the second linear driver 331 is fixedly connected to a connecting column 34. The connecting column 34 is fixedly sleeved with a lower gear 35. The grinding ring 33 is fixedly connected to the top of the connecting column 34. The fourth rotation source 122 can drive the rotating wheel 12 to rotate.

[0032] When it is necessary to rough-grind the upper end surface of the bearing, before the planetary wheel 11 moves to the lower grinding disc 3, the inner grinding disc 32 is first moved downward to form a groove between the inner grinding disc 32 and the grinding ring 33. When the planetary wheel 11 moves to the lower grinding disc 3, the planetary wheel 11 enters the groove. At this time, the telescopic column is inserted into the tooth gap between the planetary wheel 11 and the lower gear 35. Therefore, during the rotation of the lower grinding disc 3, the planetary wheel 11 and the grinding ring 33 remain relatively still, that is, the lower end surface of the bearing and the grinding ring 33 remain relatively still. Therefore, when the upper grinding disc 13 and the lower grinding disc 3 rotate to grind the bearing, the upper end surface of the bearing can be rough-ground first to make the height of the bearing tend to be consistent, so as to facilitate the subsequent grinding of the bearing and improve the grinding quality.

[0033] Reference Figure 1 A second rotation source 41 is fixedly installed on the movable frame 14, and the second rotation source 41 is fixedly connected to a driving column 42 through a gear set. The bottom of the driving column 42 is fixedly connected to a support plate 43. The upper grinding disc 13 is fixedly connected to the bottom of the support plate 43 through a support rod. A liquid storage shell 44 is fixedly connected to the side wall of the support plate 43. A plurality of cooling pipes 45 that penetrate the upper grinding disc 13 are fixedly connected to the bottom of the liquid outlet shell to dissipate heat during the grinding process.

[0034] Reference Figure 1 The feeding mechanism 2 includes a feeding disc 21, a dial 22, a feeding rack 23, a feeding wheel 24 and a blocking rod 25. The feeding disc 21 is slidably connected to the frame 1 horizontally, and the feeding disc 21 moves in the direction close to the lower grinding disc 3 to facilitate the loading and unloading of the bearing. The dial 22 is rotatably connected to the top of the feeding disc 21, and the dial 22 can drive the planetary wheel 11 to revolve on the feeding disc 21. The feeding rack 23 includes four vertically extending support rods and air bags. The bearing is placed between the four support rods. The expansion and contraction of the air bags can realize the single drop of the bearing into the workpiece slot 112 on the planetary wheel 11. The feeding wheel 24 is rotatably connected to one side of the feeding rack 23. The feeding wheel 24 can realize its rotation through a motor. The upper end surface is fixedly connected with a feeding tooth column 241, and the feeding tooth column 241 meshes with the gear teeth of the planetary wheel 11 to enable the planetary wheel 11 to rotate, so as to load the multiple workpiece slots 112 on the planetary wheel 11. A feeding port 211 for the planetary wheel 11 to move to the lower grinding disc 3 is provided on one side of the feeding plate 21 close to the lower grinding disc 3, and the stop rod 25 is rotatably connected to one side of the feeding port 211. When the planetary wheel 11 rotates to the feeding port 211, the planetary wheel 11 moves to the lower grinding disc 3 under the restriction of the stop rod 25. The control board 151 is arranged on the top of the rotating ring 15, and a cylinder installed on the moving frame 14 is arranged on the top of the control board 151, and the cylinder can drive the control board 151 to move in the vertical direction.

[0035] When the bearings need to be loaded, multiple bearings are arranged vertically on the loading rack 23, and the airbags are contracted and expanded to make the bearings fall down individually and fall into the workpiece slot 112 on the planetary wheel 11. Then, the loading wheel 24 is rotated to rotate the planetary wheel 11 to load the bearings, and then the dial 22 is rotated to drive the planetary wheel 11 to rotate and repeat the above steps to load multiple planetary wheels 11. Then, the upper grinding disc 13 is lowered, and the control plate 151 is moved up, and the transmission gear column 16 is moved up accordingly and kept in contact with the control plate 151 to provide space for the planetary wheel 11 to move onto the lower grinding disc 3. As the planetary wheel 11 rotates on the loading plate 21, when the planetary wheel 11 rotates to the position of the baffle rod 25, the inner grinding disc 32 is blocked by the baffle rod 25, and the inner grinding disc 32 and the grinding ring 33 form a plurality of grooves for supporting the planetary wheel 11. Then, the planetary wheel 11 is moved in an "∞" shape into the groove formed by the grinding ring 33 and the inner grinding disc 32 through the rotation of the inner grinding disc 32 and the loading wheel 24 to complete the loading of the bearing. When the grinding is completed, the planetary wheel 11 can be unloaded through the rotation of the inner grinding disc 32 and the loading wheel 24, so as to reduce the workload of the staff and improve work efficiency.

[0036] Reference Figure 1 , a feeding port 5 is provided on the feeding tray 21, and a feeding wheel 51 is rotatably connected to the feeding tray 21 on one side of the feeding port 5, and a feeding tooth column 52 is fixedly connected to the upper end surface of the feeding wheel 51. When the planetary wheel 11 moves to the feeding port 5, the polished bearing will fall from the feeding port 5, and the planetary wheel 11 can be driven to rotate by the rotation of the feeding wheel 51 and the meshing of the feeding tooth column 52 and the gear teeth on the planetary wheel 11, so that the bearings on the planetary wheel 11 fall one by one and are collected to improve work efficiency. A blowing shell 6 is fixedly connected to the feeding tray 21, and a blowing pipe 61 for cleaning the planetary wheel 11 is connected to the top of the blowing shell 6. Due to the coolant, the coolant will be attached to the surface of the planetary wheel 11. When the planetary wheel 11 moves into the blowing shell 6, the airflow generated by the blowing pipe 61 can clean the surface of the planetary wheel 11 to facilitate subsequent work.

[0037] The implementation principle of a uniform-section thin-walled bearing end face grinding device according to an embodiment of the present invention is as follows: first, the loading plate 21 is moved to make it close to the lower grinding plate 3, and then the planetary wheel 11 is placed on the loading plate 21. The loading wheel 24 rotates to drive the planetary wheel 11 to rotate so that the bearings fall one by one into the workpiece groove 112 on the planetary wheel 11, and the dial 22 is rotated to make the planetary wheel 11 filled with bearings revolve, and at the same time, the upper grinding plate 13 is moved down and the control plate 151 and the inner grinding plate 32 are raised. The transmission gear column 16 moves up under the action of the reset spring and remains in contact with the control plate 151. The planetary wheel 11 rotates to the loading port 211 and moves to the top of the grinding circle 33 under the action of the baffle 25. Then, multiple planetary wheels 11 are moved one by one onto the grinding circle 33, and then the control plate 151 and the transmission gear column 16 are moved down.

[0038] At this time, the transmission gear column 16 is located in the tooth gap between the planetary wheel 11 and the lower gear 35. Then, the upper grinding disc 13 and the lower grinding disc 3 are rotated in opposite directions. Under the restriction of the transmission gear column 16, the planetary wheel 11 and the grinding ring 33 are relatively stationary. The upper grinding disc 13 grinds the top of the bearing to make its height consistent. Then, the inner grinding disc 32 and the grinding ring 33 are moved downward, so that a gap is generated between the grinding ring 33 and the inner grinding disc 32. Then, the rotating ring 15 drives the planetary wheel 11 to rotate, so as to throw out the generated debris.

[0039] Then, the outer grinding disc 31, the inner grinding disc 32 and the grinding ring 33 are placed on the same horizontal plane, and the upper grinding disc 13 and the lower grinding disc 3 are rotated to fine-grind the bearing. After the fine grinding is completed, the grinding ring 33 is moved downward. Due to the restriction of the upper grinding disc 13 and the revolution of the planetary wheel 11, the planetary wheel 11 falls onto the grinding ring 33 synchronously.

[0040] Finally, the grinding ring 33 and the inner grinding disc 32 are raised, and the control panel 151 and the transmission gear column 16 are moved upward, and then the inner grinding disc 32 and the dial 22 are rotated, and under the action of the stop rod 25, the planetary wheel 11 is in an "∞" shape and starts to unload.

[0041] In a second aspect, the present invention provides a method for grinding the end surface of a uniform cross-section thin-walled bearing, which is applied to a uniform cross-section thin-walled bearing end surface grinding device in the first aspect, wherein the method comprises: S1, load the bearings to be polished onto the planetary wheel 11 one by one, move the inner polishing disc 32 upward and the upper polishing disc 13 downward, move the loading disc 21 close to the lower polishing disc 3, turn the dial 22 and move the planetary wheel 11 onto the polishing circle 33 under the action of the stop rod 25, and turn the rotating wheel 12 to make the planetary wheel 11 correspond to the polishing circle 33 one by one; S2, the transmission gear column 16 meshes with the planetary wheel 11 and the lower gear 35, and the upper grinding disc 13 and the lower grinding disc 3 rotate to roughly grind the bearing; S3, the inner grinding disc 32 is moved downward and the grinding ring 33 is moved downward, the rotating ring 15 drives the transmission gear column 16 to rotate and throw away the liquid and impurities; S4, moving the grinding ring 33 upward and making the outer grinding disc 31, the inner grinding disc 32 and the grinding ring 33 on the same horizontal plane, and fine grinding the bearing; S5, cutting the polished bearings.

Claims

1. A uniform cross-section thin-walled bearing end surface grinding device, comprising a frame (1), a plurality of planetary wheels (11) for carrying bearings, a rotating wheel (12), a feeding mechanism (2) arranged on the frame (1), and an upper grinding disc (13), characterized in that: The frame (1) is vertically slidably connected to a moving frame (14), an upper grinding disc (13) is arranged on the moving frame (14), a rotating ring (15) is rotatably connected to the moving frame (14), and a transmission tooth column (16) capable of vertical movement is arranged on the lower end surface of the rotating ring (15); A lower grinding disc (3) for grinding the lower end surface of the bearing is provided below the upper grinding disc (13), the lower grinding disc (3) comprising an outer grinding disc (31), an inner grinding disc (32) capable of vertical movement, and a plurality of grinding rings (33), the number of the grinding rings (33) being equal to the number of the planetary wheel (11), the upper and lower end surfaces of the planetary wheel (11) being fixedly connected to a limiting ring (111), the outer diameter of the limiting ring (111) being equal to the diameter of the grinding ring (33), the lower part of the grinding ring (33) being fixedly connected to a lower gear (35) via a connecting column (34), and the number of teeth of the lower gear (35) being equal to that of the planetary wheel (11); The rotating wheel (12) is arranged at the center of the inner grinding disc (32), and the upper end surface of the rotating wheel (12) is fixedly connected to an inner tooth column (121).

2. The uniform cross-section thin-walled bearing end surface grinding device according to claim 1, characterized in that: The feeding mechanism (2) comprises a feeding plate (21) slidably connected to the frame (1) in a transverse direction, a dial (22) for moving the planetary wheel (11) being rotatably connected to the top of the feeding plate (21), a feeding frame (23) being fixedly connected to the feeding plate (21), an air bag for causing a single bearing to fall being installed on the feeding frame (23), a feeding wheel (24) being rotatably connected to the feeding plate (21), a feeding tooth column (241) being fixedly connected to the upper end surface of the feeding wheel (24), and the feeding plate A stopper (25) is rotatably connected to one side of the loading plate (21) close to the lower grinding plate (3), and a loading port (211) is provided on one side of the loading plate (21) close to the lower grinding plate (3) for the planetary wheel (11) to move to the grinding ring (33). A first rotating source (321) is installed on the frame (1), and the first rotating source (321) can drive the inner grinding plate (32) to rotate through a second rotating frame (323). A control plate (151) is vertically slidably connected to the rotating ring (15).

3. The uniform cross-section thin-walled bearing end surface grinding device according to claim 2, characterized in that: The frame (1) is provided with a first linear drive (4); the movable frame (14) is fixedly connected to the driving shaft of the first linear drive (4); the movable frame (14) is provided with a second rotation source (41); the movable frame (14) is rotationally connected to a driving column (42); the second rotation source (41) can drive the driving column (42) to rotate; a support plate (43) is fixedly connected to the bottom of the driving column (42); the upper grinding disc (13) is fixedly connected to the bottom of the supporting plate (43) via a supporting rod; a liquid storage shell (44) is fixedly connected to the side wall of the supporting plate (43); and a plurality of cooling pipes (45) penetrating the upper grinding disc (13) are connected to the bottom of the liquid storage shell (44); 4. The uniform cross-section thin-walled bearing end surface grinding device according to claim 2, characterized in that: A second linear driver (331) is installed at the bottom of the connecting column (34), and the second linear driver (331) can drive the connecting column (34) and the grinding ring (33) to move in a vertical direction.

5. The uniform cross-section thin-walled bearing end surface grinding device according to claim 2, characterized in that: A third linear driver (322) is mounted on the second rotating frame (323), and the inner grinding disc (32) is fixedly connected to a driving shaft of the third linear driver (322).

6. The uniform cross-section thin-walled bearing end surface grinding device according to claim 2, characterized in that: The loading plate (21) is provided with a loading port (5), a loading wheel (51) is rotatably connected to the loading plate (21) on one side of the loading port (5), and a loading tooth column (52) is fixedly connected to the upper end surface of the loading wheel (51).

7. The uniform cross-section thin-walled bearing end surface grinding device according to claim 2, characterized in that: The loading tray (21) is fixedly connected to a blowing shell (6), and the top of the blowing shell (6) is connected to a blowing pipe (61) for cleaning the planetary wheel (11).

8. A method for grinding the end surface of a uniform cross-section thin-walled bearing, characterized in that: The method for grinding the end surface of a uniform cross-section thin-walled bearing as described in claim 3 is as follows: S1, loading the bearings to be polished onto the planetary wheel (11) one by one, moving the inner polishing disc (32) upward and the upper polishing disc (13) downward, moving the loading disc (21) close to the lower polishing disc (3), rotating the dial (22) and moving the planetary wheel (11) onto the polishing circle (33) under the action of the stop rod (25), and rotating the rotating wheel (12) so that the planetary wheel (11) and the polishing circle (33) correspond one to one; S2, the transmission gear column (16) meshes with the planetary wheel (11) and the lower gear (35), and the upper grinding disc (13) and the lower grinding disc (3) rotate to roughly grind the bearing; S3, the inner grinding disc (32) and the grinding ring (33) are moved downward, the rotating ring (15) drives the transmission gear column (16) to rotate and throw away the liquid and impurities; S4, moving the grinding ring (33) upward and making the outer grinding disc (31), the inner grinding disc (32) and the grinding ring (33) be located on the same horizontal plane, and fine grinding the bearing; S5, cutting the polished bearings.

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