A lapping process and apparatus for reducing friction torque of a combination seal

Abstract

The application provides a grinding equipment, which comprises a box, a material table and a feeding and discharging manipulator, an operation opening is formed in the side of the box, a box door is arranged at the operation opening, a support is fixed in the box through supporting legs, a disc is installed on the support through a positioning rod, a gear ring is rotatably connected to the disc, a power motor one is installed on the support, an output shaft of the power motor one is connected with one end of a speed reducer one, a driving gear is connected to the other end of the speed reducer one, the driving gear is engaged with the gear ring, a plurality of driving shafts are vertically rotatably installed on the disc, the lower end of each driving shaft is connected with a driven gear, the driven gear is engaged with the gear ring, the upper end of each driving shaft is connected with a placing disc, the placing disc is provided with elastic positioning heads for positioning workpieces, and a plurality of spray guns are arranged on the disc.

Description

Technical Field

[0001] This invention belongs to the field of sealing structure processing technology, and relates to a grinding process and equipment for reducing the frictional torque of a combined sealing structure. Background Technology

[0002] Bearing seals primarily seal against various greases, lubricants, and external mud and water. During use, as the sealing lip wears, the radial pressure of the seal decreases, thus reducing its performance. With the development of fuel-efficient and new energy vehicles, people are increasingly focused on energy conservation, emission reduction, and the driving range of new energy vehicles. Beyond ensuring proper sealing performance with traditional seals, there is a growing demand for low frictional torque. Lower frictional torque in the seal results in less energy loss in the vehicle, further optimizing fuel economy and improving the driving range of new energy vehicles. Therefore, it is essential to design a grinding process and equipment to reduce the frictional torque of combined sealing structures. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a grinding process and equipment for reducing the frictional torque of combined sealing structures.

[0004] The objective of this invention can be achieved through the following technical solution: A grinding process for reducing the frictional torque of a combined sealing structure, characterized by comprising the following steps: S1. Using a grinding device, the workpiece is stored on a storage rack. A loading and unloading robot places the workpiece from the storage rack onto a placement tray. As the placement tray rotates, abrasive is sprayed onto the workpiece under the action of a spray gun. Simultaneously, the robot moves up and down to grind the surface of the workpiece at the processing station. After processing, the box door automatically opens, and the processed workpiece is taken out; S2. The workpiece is assembled and inspected.

[0005] The abrasive is 0.2mm glass beads, and the air pressure is 0.3-0.6mpa.

[0006] The grinding equipment includes a housing, characterized in that it further includes a material platform and a loading / unloading robot. An operating port is provided on the side of the housing, and a door is provided at the operating port. The door is connected to a drive assembly that allows it to move up and down. A bracket is fixed inside the housing via support legs. A disc is mounted on the bracket via a positioning rod. A gear ring is rotatably connected to the disc. A power motor is mounted on the bracket. The output shaft of the power motor is connected to one end of a reducer. The other end of the reducer is connected to a drive gear, which meshes with the gear ring. Several drive shafts are vertically and rotatably mounted on the disc, and the drive shafts are evenly distributed. The lower end of each drive shaft is connected to a driven gear, which meshes with the gear ring. The upper end of each drive shaft is connected to a placement plate. The placement plate has an elastic positioning head for positioning workpieces. Several spray guns are also provided on the disc.

[0007] A mounting base is fixed in the middle of the disc. A spline sleeve is vertically rotatably connected to the mounting base. The spline sleeve is fixedly connected to a gear ring. A spline shaft is vertically mounted on the spline sleeve. A quick connector is mounted on the upper part of the spline shaft. Several upper fixing rods are also horizontally mounted on the upper part of the spline shaft. A lower fixing rod is also horizontally mounted on the spline sleeve. The lower fixing rod is rotatably connected to a linkage. A universal connector is provided between the linkage and the upper fixing rod. The spray gun is inclinedly connected to the linkage. The spray gun is connected to the quick connector through a guide tube. An annular head is mounted on the lower part of the spline shaft. The bracket and the middle of the drive swing arm are rotatably connected. The lower end of the drive swing arm is connected to a U-shaped limiting fork, and the U-shaped limiting fork cooperates with the annular head. The upper end of the drive swing arm is rotatably connected to the push rod of the push rod motor. The body of the push rod motor and the bracket are rotatably connected.

[0008] The lower part of the box is connected to a sand return pipe, and the upper part of the box is equipped with an auxiliary cylinder. The auxiliary cylinder is connected to the sand supply assembly through pipe one, and the auxiliary cylinder is connected to a quick connector through pipe two.

[0009] The enclosure is also equipped with a transparent observation window.

[0010] The material platform is equipped with a second power motor. A rotating disk is installed at the end of the output shaft of the second power motor. Several storage racks for storing workpieces are installed on the rotating disk. The rotating disk also has clearance notches corresponding to the storage racks. A lifting plate is provided on the material platform. A working arm that cooperates with the storage rack is installed on the lifting plate. The lifting plate is also connected to a second drive assembly that can move it up and down.

[0011] The loading / unloading robot is mounted on the material platform and has an electric gripper for clamping materials.

[0012] The drive assembly includes a mounting bracket and a cylinder. The mounting bracket is fixed to the housing. The cylinder body and the mounting bracket are rotatably connected. The piston rod end of the cylinder is rotatably connected to the housing door. The housing is also vertically mounted with a track body. The housing door has guide wheels that cooperate with the track body.

[0013] The second drive assembly includes a second mounting frame, a third power motor, a guide rod, a guide sleeve, a lead screw, and a nut. The second mounting frame is mounted on the material platform. The guide rod is vertically fixed on the second mounting frame. The guide sleeve is slidably connected to the guide rod. The lead screw is vertically rotatably mounted on the second mounting frame. The nut is connected to the lead screw. The third power motor is fixed on the material platform. The output shaft end of the third power motor is connected to a first pulley. The lower end of the lead screw is fixed to a second pulley. A synchronous belt is sleeved between the second pulley and the first pulley. The lifting plate is connected to the nut and also to the guide sleeve.

[0014] Compared with existing technologies, this grinding process and equipment for reducing the frictional torque of combined sealing structures have the following advantages:

[0015] The grinding process and equipment used in this invention further reduce the friction torque of the combined structure. It is suitable for surface treatment of the lips of various sealing structures and the metal skeleton of the oil-sparging ring, and can reduce the torque by 20%-50%. At the same time, the process is simple and reliable. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0017] Figure 2 This is a three-dimensional structural diagram of the removed portion of the present invention;

[0018] Figure 3 This is a three-dimensional structural diagram of the material platform in this invention;

[0019] Figure 4 This is a three-dimensional structural diagram of the working arm in this invention;

[0020] Figure 5 This is a schematic diagram illustrating the principle of the present invention;

[0021] In the diagram: 1. Housing; 1a. Operating port; 2. Sand return pipe; 3. Transparent observation window; 4. Sand supply assembly; 5. Pipeline 1; 6. Auxiliary cylinder; 7. Mounting bracket 1; 8. Cylinder; 9. Door; 10. Guide wheel; 11. Track; 12. Support leg; 13. Bracket; 14. Power motor 1; 15. Reducer; 16. U-shaped limiting fork; 17. Ring head; 18. Drive gear; 19. Driven gear; 20. Drive shaft; 21. Placement plate; 22. Disc; 23. Spray gun; 24. Linkage component; 25. Lower fixing rod; 26. Universal connector; 27. Guide... 29. Pipe; 30. Upper fixing rod; 31. Quick coupling; 32. Spline shaft; 33. Spline sleeve; 34. Mounting base; 35. Elastic positioning head; 36. Gear ring; 37. Drive swing arm; 38. Push rod motor; 39. Material platform; 40. Loading / unloading robot; 41. Electric clamping claw; 42. Rotary disk; 41a. Clearance notch; 43. Storage rack; 44. Working arm; 45. Mounting bracket two; 46. Lead screw; 47. Guide rod; 48. Nut; 49. Lifting plate; 50. Guide sleeve; 51. Pulley two; 52. Synchronous belt; 53. Pulley one; 54. Power motor three. Detailed Implementation

[0022] like Figures 1-5As shown, the grinding process for reducing the frictional torque of the combined sealing structure includes the following steps: S1. Using grinding equipment, the workpiece is stored on the storage rack 42. The workpiece on the storage rack 42 is placed on the placement tray 21 by the loading and unloading robot 39. As the placement tray 21 rotates, the abrasive is sprayed onto the workpiece by the spray gun 23. The robot moves up and down to grind the surface of the workpiece at the processing station. After processing, the box door 9 opens automatically and the processed workpiece is taken out; S2. The workpiece is assembled and inspected; Specifically, the abrasive is 0.2mm glass beads and the air pressure is 0.3-0.6mpa.

[0023] In this invention, the surface of the metal skeleton is roughened after grinding to reduce friction. The surface parameters are Ra 0.4μm-1.2μm and Rz 2.0-1.0, which reduces the contact area and resistance of the lip during the sliding process.

[0024] The grinding equipment adopts suction-type sandblasting, which uses the high-speed flow of compressed air in the spray gun 23 to create negative pressure and generate an ejector effect, drawing the abrasive into the spray gun 23, and then spraying it out at high speed from the nozzle along with the compressed air to achieve sandblasting treatment on the surface of the workpiece; the workpiece inlet and outlet adopts a pneumatic automatic box door 9, which can automatically open and close when the workpiece enters or exits.

[0025] The grinding equipment includes a housing 1, a material platform 38, and a loading / unloading robot 39, which is an existing product. An operation port 1a is provided on the side of the housing 1, and a door 9 is provided at the operation port 1a. The door 9 is connected to a drive assembly that allows it to move up and down. A bracket 13 is fixed inside the housing 1 via support feet 12. A disc 22 is mounted on the bracket 13 via a positioning rod. A gear ring 35 is rotatably connected to the disc 22. A power motor 14 is mounted on the bracket 13. The output shaft of the power motor 14 is connected to one end of a reducer 15, and the other end of the reducer 15 is connected to a drive gear 18, which meshes with the gear ring 35. Several drive shafts 20 are vertically rotatably mounted on the disc 22. The shafts 20 are evenly distributed. The lower end of the drive shaft 20 is connected to the driven gear 19, which meshes with the gear ring 35. The upper end of the drive shaft 20 is connected to the placement disk 21. With this structure, the drive gear 18 can be driven to rotate by the power motor 14. The drive gear 18 meshes with the gear ring 35, thereby causing the gear to rotate. The gear ring 35 meshes with the driven gear 19, thereby causing the drive shaft 20 to rotate. The drive shaft 20 causes the placement disk 21 to rotate, thus allowing the workpiece to rotate. The placement disk 21 has an elastic positioning head 34 for positioning the workpiece. The elastic positioning head 34 can firmly position the workpiece on the placement disk 21. Several spray guns 23 are also provided on the disc 22. In practice, there are twelve placement disks 21.

[0026] A mounting base 33 is fixed in the middle of the disc 22. A spline sleeve 32 is vertically rotatably connected to the mounting base 33. The spline sleeve 32 and the gear ring 35 are fixedly connected. A spline shaft 31 is vertically mounted on the spline sleeve 32. A quick connector 30 is mounted on the upper part of the spline shaft 31. Several upper fixing rods 29 are also horizontally mounted on the upper part of the spline shaft 31. A lower fixing rod 25 is also horizontally mounted on the spline sleeve 32. The lower fixing rod 25 is rotatably connected to the linkage 24. A universal connector 26 is provided between the linkage 24 and the upper fixing rods 29. The spray gun 23 is inclinedly connected to the linkage 24. The spray gun 23 is connected to the quick connector 30 through the guide tube 27. The lower part of the spline shaft 31 is mounted with... The device has a ring head 17, a bracket 13, and a drive swing arm 36 that are rotatably connected in the middle. The lower end of the drive swing arm 36 is connected to a U-shaped limiting fork 16, and the U-shaped limiting fork 16 cooperates with the ring head 17. The upper end of the drive swing arm 36 is rotatably connected to the push rod of the push rod motor 37. The body of the push rod motor 37 is rotatably connected to the bracket 13. With this structure, while the gear ring 35 rotates, the spray gun 23 can also rotate synchronously under the drive of the spline sleeve 32. At the same time, the tilt angle of the spray gun 23 can also be adjusted and changed according to the processing needs under the action of the push rod motor 37, so that it can be adapted to the processing requirements of the workpiece and is easy to adjust.

[0027] The lower part of the housing 1 is connected to the sand return pipe 2, and the upper part of the housing 1 is equipped with an auxiliary cylinder 6. The auxiliary cylinder 6 is connected to the sand supply component 4 through pipe 1 5, and the auxiliary cylinder 6 is connected to the quick connector 30 through pipe 2. This adopts the existing technology and adopts suction-type sandblasting, that is, the abrasive is drawn into the spray gun 23 by the negative pressure generated by the high-speed flow of compressed air in the spray gun 23.

[0028] A transparent observation window 3 is also installed on the housing 1.

[0029] The material table 38 is equipped with a second power motor. A rotating disk 41 is installed at the end of the output shaft of the second power motor. Several storage racks 42 for storing workpieces are installed on the rotating disk 41. The rotating disk 41 is also provided with clearance notches 41a corresponding to the storage racks. A lifting plate 48 is provided on the material table 38. A working arm 43 that cooperates with the storage racks 42 is installed on the lifting plate 48. The lifting plate 48 is also connected to a second drive assembly that can move it up and down. A loading / unloading robot 39 is installed on the material table 38. The loading / unloading robot 39 has a clamping electric claw 40. With this structure, automatic loading of workpieces can be realized with the cooperation of the working arm 43 and the loading / unloading robot 39.

[0030] The drive assembly includes a mounting bracket 7 and a cylinder 8. The mounting bracket 7 is fixed on the housing 1. The cylinder body of the cylinder 8 is rotatably connected to the mounting bracket 7. The piston rod end of the cylinder 8 is rotatably connected to the housing door 9. The housing 1 is also vertically mounted with a track body 11. The housing door 9 has guide wheels 10 that cooperate with the track body 11.

[0031] The second drive assembly includes a second mounting bracket 44, a third power motor 53, a guide rod 46, a guide sleeve 49, a lead screw 45, and a nut 47. The second mounting bracket 44 is mounted on the material platform 38. The guide rod 46 is vertically fixed on the second mounting bracket 44. The guide sleeve 49 is slidably connected to the guide rod 46. The lead screw 45 is vertically rotatably mounted on the second mounting bracket 44. The nut 47 is connected to the lead screw 45. The third power motor 53 is fixed on the material platform 38. The output shaft end of the third power motor 53 is connected to the first pulley 52. ​​The lower end of the lead screw 45 is fixed with a second pulley 50. A synchronous belt 51 is sleeved between the second pulley 50 and the first pulley 52. ​​The lifting plate 48 is connected to the nut 47 and also to the guide sleeve 49.

[0032] The sealing ring has a combined structure, including an outer ring and an inner ring. In this embodiment, the workpiece refers to the outer ring. Torque tests were performed on the sealing ring obtained by this grinding process and on existing sealing rings on the market. The data are as follows:

[0033]

[0034] Based on the data above, it can be seen that this process can significantly reduce the torque of the sealing ring.

[0035] All of the above components are general standard parts or components known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0036] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A grinding apparatus, comprising a housing (1), characterized in that, It also includes a material platform (38) and a loading / unloading robot (39). An operation port (1a) is provided on the side of the box (1). A box door (9) is provided at the operation port (1a). The box door (9) is connected to a drive assembly that can move it up and down. A bracket (13) is fixed inside the box (1) by a support foot (12). A disc (22) is installed on the bracket (13) by a positioning rod. A gear ring (35) is rotatably connected to the disc (22). A power motor (14) is installed on the bracket (13). The output shaft of the power motor (14) is connected to one end of a reducer (15). The reducer (15) is connected to a drive gear (18) at the other end. The drive gear (18) meshes with a gear ring (35). Several drive shafts (20) are vertically rotatably mounted on the disc (22), and the drive shafts (20) are evenly distributed. The lower end of the drive shaft (20) is connected to a driven gear (19), which meshes with the gear ring (35). The upper end of the drive shaft (20) is connected to a placement disc (21). The placement disc (21) has an elastic positioning head (34) for positioning the workpiece. Several spray guns (23) are also provided on the disc (22). (22) A mounting base (33) is fixed in the middle. A spline sleeve (32) is vertically rotatably connected to the mounting base (33). The spline sleeve (32) and the gear ring (35) are fixedly connected. A spline shaft (31) is vertically provided on the spline sleeve (32). A quick connector (30) is installed on the upper part of the spline shaft (31). Several upper fixing rods (29) are also horizontally installed on the upper part of the spline shaft (31). A lower fixing rod (25) is also horizontally installed on the spline sleeve (32). The lower fixing rod (25) and the linkage (24) are rotatably connected. A universal joint is provided between the linkage (24) and the upper fixing rod (29). The spray gun (23) is inclinedly connected to the linkage (24) via the connector (26). The spray gun (23) is connected to the quick connector (30) via the guide tube (27). The spline shaft (31) is equipped with an annular head (17) at its lower part. The bracket (13) and the drive swing arm (36) are rotatably connected at the middle. The lower end of the drive swing arm (36) is connected to the U-shaped limiting fork (16), and the U-shaped limiting fork (16) cooperates with the annular head (17). The upper end of the drive swing arm (36) is rotatably connected to the push rod of the push rod motor (37). The body of the push rod motor (37) is rotatably connected to the bracket (13).

2. The grinding equipment according to claim 1, characterized in that, The lower part of the box (1) is connected to a sand return pipe (2), and the upper part of the box (1) is equipped with an auxiliary cylinder (6). The auxiliary cylinder (6) is connected to the sand supply component (4) through pipe one (5), and the auxiliary cylinder (6) is connected to the quick connector (30) through pipe two.

3. The grinding equipment according to claim 1, characterized in that, A transparent observation window (3) is also installed on the box (1).

4. The grinding equipment according to claim 1, characterized in that, The material platform (38) is equipped with a second power motor. The output shaft end of the second power motor is equipped with a rotating disk (41). The rotating disk (41) is equipped with several storage racks (42) for storing workpieces. The rotating disk (41) is also provided with clearance notches (41a) corresponding to the storage racks. The material platform (38) is provided with a lifting plate (48). The lifting plate (48) is equipped with a working arm (43) that cooperates with the storage racks (42). The lifting plate (48) is also connected to a second drive assembly that can move it up and down.

5. A grinding apparatus according to claim 4, characterized in that, The loading and unloading robot (39) is mounted on the material table (38) and has a clamping electric claw (40).

6. The grinding equipment according to claim 1, characterized in that, The drive assembly includes a mounting bracket (7) and a cylinder (8). The mounting bracket (7) is fixed on the housing (1). The cylinder body of the cylinder (8) is rotatably connected to the mounting bracket (7). The piston rod end of the cylinder (8) is rotatably connected to the door (9). The housing (1) is also vertically mounted with a track body (11). The door (9) has guide wheels (10) that cooperate with the track body (11).

7. A grinding apparatus according to claim 4, characterized in that, The second drive assembly includes a second mounting frame (44), a third power motor (53), a guide rod (46), a guide sleeve (49), a lead screw (45), and a nut (47). The second mounting frame (44) is mounted on the material platform (38). The guide rod (46) is vertically fixed on the second mounting frame (44). The guide sleeve (49) is slidably connected to the guide rod (46). The lead screw (45) is vertically rotatably mounted on the second mounting frame (44). The nut (47) is connected to the lead screw (45). The third power motor (53) is fixed on the material platform (38). The output shaft end of the third power motor (53) is connected to the first pulley (52). The lower end of the lead screw (45) is fixed with a second pulley (50). A synchronous belt (51) is sleeved between the second pulley (50) and the first pulley (52). The lifting plate (48) is connected to the nut (47) and also to the guide sleeve (49).

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