Ball bearing grinding device

Abstract

The invention discloses a ball bearing grinding device, and belongs to the field of bearing grinding tools, the ball bearing grinding device comprises a positioning ring seat, and open grooves are uniformly formed in an inner cavity of the positioning ring seat; the device further comprises a clamping assembly, the clamping assembly comprises supporting plates fixedly installed in the open grooves, magnet blocks are installed on the supporting plates in a sliding mode, sliding columns are fixedly installed at one ends of the magnet blocks, and the sliding columns are installed in inner cavities of the adjacent open grooves in a sliding mode. A reset spring is fixedly installed between each sliding column and the adjacent supporting plate, and an arc-shaped clamping plate is fixedly installed on the other side of each sliding column. The problems of surface damage and centering precision degradation caused by sliding friction between the clamping plates and the outer wall of the outer ring in the clamping process can be effectively eliminated or greatly reduced while high-precision automatic centering and reliable clamping of the bearing outer ring are ensured.

Description

Technical Field

[0001] This invention relates to the field of bearing grinding fixtures, and more specifically, to a ball bearing grinding apparatus. Background Technology

[0002] In the automated grinding process of ball bearing outer rings, external clamping fixtures are required to achieve high-precision automatic centering and reliable clamping. Currently, mechanical external clamping devices based on the three-point centering principle are widely used to clamp the bearing outer rings. These devices typically use three jaws or clamping plates evenly distributed at 120° to move synchronously in the radial direction, directly contacting and clamping the outer cylindrical surface of the outer ring. The geometric characteristics of the three-jaw linkage are used to achieve automatic centering of the workpiece.

[0003] In this typical automated clamping process, to achieve "automatic centering," the outer ring must be able to slide freely radially to the geometric center defined by the theoretical contact point of the three clamping plates before the clamping force is fully established, under the combined force applied by the three clamping plates. However, the physical basis for achieving this sliding process is the direct contact between the clamping plates and the cylindrical surface of the outer ring's outer wall. When the clamping plates move centripetally under the driving force, their contact surfaces will inevitably slide relative to the outer ring's outer wall, which is either stationary or rotating at low speed. This frictional behavior inevitably brings multiple negative effects: First, it easily causes mechanical scratches or indentations on the outer ring's outer wall, damaging surface integrity, affecting assembly, and potentially reducing reliability; second, frictional force hinders the free movement of the workpiece, leading to obstructed or deviated automatic centering, reducing accuracy and repeatability; third, its non-uniformity makes it difficult to precisely control the effective clamping force, affecting clamping stability.

[0004] Existing technologies typically attempt to reduce friction by optimizing the surface treatment of the clamping plates or applying lubricants, but this can only reduce the coefficient of friction to a limited extent, and the actual operational effect is generally poor. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention aims to provide a ball bearing grinding device that can effectively eliminate or significantly reduce the surface damage and deterioration of centering accuracy caused by sliding friction between the clamping plate and the outer wall of the outer ring during the clamping process, while ensuring high-precision automatic centering and reliable clamping of the bearing outer ring.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A ball bearing grinding device includes a positioning ring seat, wherein the inner cavity of the positioning ring seat is uniformly provided with slots; Also includes: A clamping assembly includes a support plate fixedly installed in each set of slots. A magnet is slidably mounted on each set of support plates. A sliding column is fixedly mounted on one end of each set of magnets. Each set of sliding columns is slidably mounted in the inner cavity of an adjacent slot. A return spring is fixedly mounted between each set of sliding columns and an adjacent support plate. An arc-shaped clamping plate is fixedly mounted on the other side of each set of sliding columns. A soft protective layer is fixedly mounted on the other side of each set of arc-shaped clamping plates. A bearing outer ring is contacted between each set of soft protective layers. A rolling centering component is provided on each set of arc-shaped clamping plates.

[0008] Furthermore, the rolling centering assembly includes movable grooves formed on both sides of the sliding column and the arc-shaped clamping plate. Each set of movable grooves has a movable plate rotatably mounted in its inner cavity. Each set of movable plates has a guide wheel rotatably mounted on its other end. Each set of guide wheels is in contact with the outer wall of the outer ring of the bearing. Each set of sliding columns has a fixed plate fixedly mounted on both sides. Each set of fixed plates has an arc-shaped spring fixedly mounted between it and the adjacent movable plate. The bearing outer ring is uniformly provided with base plates on its lower side. Each set of base plates is fixedly installed in the inner cavity of the positioning ring seat. One set of base plates is provided with a movable rod on its lower side. The movable rod is slidably installed in the positioning ring seat. Contact blocks are fixedly installed on the opposite side of the movable rod and the adjacent base plates. Electromagnets are provided on the side of each set of magnet blocks away from the adjacent sliding column. Each set of electromagnets is fixedly installed in the inner cavity of the adjacent slot. The two sets of contact blocks are electrically connected to the multiple sets of electromagnets.

[0009] Furthermore, a circular annular tube is fixedly installed on the top of the positioning ring seat, an air inlet pipe is fixedly installed on one side of the circular annular tube, L-shaped tubes are evenly arranged above the circular annular tube, cavities are evenly opened inside the positioning ring seat, the bottom end of each group of L-shaped tubes passes through the circular annular tube and the positioning ring seat, and extends into the inner cavity of the adjacent cavity, each group of L-shaped tubes is rotatably installed with the circular annular tube and the positioning ring seat, each group of L-shaped tubes is connected to the circular annular tube, a nozzle is fixedly installed at the other end of each group of L-shaped tubes, each group of nozzles is located directly above the outer ring of the bearing, an L-shaped plate is fixedly installed at the bottom of each group of L-shaped tubes, a roller is contacted at the inner angle of each group of L-shaped plates, a connecting rod is rotatably installed at the bottom end of each group of rollers, and the other end of each group of connecting rods is fixedly installed with the adjacent sliding column.

[0010] Furthermore, a base is fixedly installed at the bottom of the positioning ring seat, and a vertical pipe is fixedly installed at the bottom of the base. The vertical pipe is connected to the inner cavity of the positioning ring seat. A collection box with a filter exhaust function is detachably installed at the bottom end of the vertical pipe. It is provided with a filter structure that can trap grinding debris while allowing gas to pass through. A suction fan is fixedly installed in the inner cavity of the vertical pipe.

[0011] Furthermore, both the movable rod and the bottom of the base plate are fixedly installed with limit plates, and an elastic rope is fixedly installed between the two sets of limit plates. The initial state of the elastic rope is a stretched state.

[0012] Furthermore, each set of base plates has steel balls rolled on one side of its top, and each set of steel balls is in contact with the bottom of the outer ring of the bearing.

[0013] Furthermore, the material of each group of soft protective layers is selected from polyamide, polyoxymethylene, polytetrafluoroethylene, copper alloy or a combination thereof, and each group of soft protective layers has anti-slip texture on the side near the outer ring of the bearing.

[0014] Furthermore, the distance between the limiting plate at the bottom of the movable rod and the inner wall of the positioning ring seat is equal to the distance between the two sets of contact blocks on the same side. The inner included angle of each set of L-shaped plates is set at 90 degrees, and the outer included angle is a rounded chamfer. The two outer edges extend in a perpendicular direction.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) In the process of clamping and fixing the outer ring of the bearing, each set of guide wheels will first contact the outer wall of the outer ring of the bearing and push it towards the center. Even if relative sliding occurs during the process of the outer ring of the bearing moving towards the center, the guide wheels will rotate adaptively to change the sliding friction force into rolling friction force, thereby realizing automatic centering before clamping and fixing the outer ring of the bearing. By using rolling guidance to replace sliding clamping, the sliding friction in the centering process is fundamentally eliminated, and mechanical damage to the outer wall of the outer ring of the bearing is completely avoided, ensuring the integrity of the workpiece surface. Secondly, the low-friction rolling guidance mechanism ensures that the outer ring of the bearing can move smoothly and accurately to the theoretical geometric center, significantly improving the accuracy and repeatability of automatic centering.

[0016] (2) During the installation of the bearing outer ring, the L-shaped tube will drive the nozzle to automatically deflect, which provides an unobstructed vertical entry path for the installation of the bearing outer ring, ensuring the smoothness and reliability of automated loading and unloading. By blowing air onto the top of the bearing outer ring through the nozzle, the newly generated or loose dry metal grinding chips can be "blown away" from the grinding point during the grinding process, preventing them from accumulating in the grinding area and the upper surface of the bearing outer ring. This effectively prevents the detached grinding chips from re-attaching to the newly processed high-precision inner wall due to electrostatic adsorption or airflow disturbance, thus preventing the grinding chips from causing scratches. At the same time, the airflow carries away some of the heat generated by grinding, which has a certain heat dissipation effect on the top of the bearing outer ring and the vicinity of the grinding area.

[0017] (3) This solution establishes a main airflow channel with a clear direction from top to bottom by combining the suction fan and the nozzle. This can realize the immediate and continuous removal and collection of grinding debris, avoiding the disorderly splashing or vortex accumulation of grinding debris caused by single air blowing, resulting in secondary pollution and difficulty in cleaning. At the same time, by collecting the grinding debris into the collection box, the collected grinding debris can be taken out by disassembling the collection box. The pure metal grinding debris collected in a centralized manner is easy to classify and package, and can be directly recycled as scrap steel, turning waste into treasure and reducing production costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall front structure of the present invention; Figure 2 This is a cross-sectional view of the positioning ring seat of the present invention; Figure 3 This is an overall sectional view of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of the structure of section A in the middle; Figure 5 For the present invention Figure 3 Enlarged view of the structure of section B in the middle; Figure 6 This is a schematic diagram of the structure of the rolling centering component of the present invention; Figure 7 This is a top view of the L-shaped plate of the present invention.

[0019] Explanation of the labels in the diagram: 1. Positioning ring seat; 2. Slotted section; 3. Support plate; 4. Magnet block; 5. Sliding column; 6. Return spring; 7. Arc-shaped clamping plate; 8. Soft protective layer; 9. Bearing outer ring; 10. Base plate; 11. Movable rod; 12. Contact block; 13. Movable slot; 14. Movable plate; 15. Guide wheel; 16. Fixed plate; 17. Arc-shaped spring; 18. Electromagnet; 19. Circular tube; 20. Air inlet pipe; 21. L-shaped tube; 22. Nozzle; 23. Cavity; 24. L-shaped plate; 25. Roller; 26. Connecting rod; 27. Steel ball; 28. Elastic rope; 29. ​​Base; 30. Vertical tube; 31. Fan; 32. Collection box; 33. Limiting plate. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1 to 7 A ball bearing grinding device includes a positioning ring seat 1, and the inner cavity of the positioning ring seat 1 is uniformly provided with slots 2. Also includes: The clamping assembly includes a support plate 3 fixedly installed in each set of slots 2. A magnet block 4 is slidably installed on each set of support plates 3. A sliding column 5 is fixedly installed on one end of each set of magnet blocks 4. Each set of sliding columns 5 is slidably installed in the inner cavity of the adjacent slot 2. A return spring 6 is fixedly installed between each set of sliding columns 5 and the adjacent support plate 3. An arc-shaped clamping plate 7 is fixedly installed on the other side of each set of sliding columns 5. A soft protective layer 8 is fixedly installed on the other side of each set of arc-shaped clamping plates 7. A bearing outer ring 9 is arranged in contact between each set of soft protective layers 8. A rolling centering component is provided on each set of arc-shaped clamping plates 7.

[0022] The rolling centering assembly includes movable grooves 13 opened on both sides of the sliding column 5 and the arc-shaped clamping plate 7. Movable plates 14 are rotatably installed in the inner cavity of each set of movable grooves 13. Guide wheels 15 are rotatably installed at the other end of each set of movable plates 14. Each set of guide wheels 15 is in contact with the outer wall of the outer ring 9 of the bearing. Fixed plates 16 are fixedly installed on both sides of each set of sliding columns 5. Arc-shaped springs 17 are fixedly installed between each set of fixed plates 16 and the adjacent movable plates 14. A base plate 10 is evenly arranged on the lower side of the outer ring 9 of the bearing. Each set of base plates 10 is fixedly installed in the inner cavity of the positioning ring seat 1. A movable rod 11 is arranged on the lower side of one set of base plates 10. The movable rod 11 is slidably installed in the positioning ring seat 1. Contact blocks 12 are fixedly installed on the opposite side of the movable rod 11 and the adjacent base plate 10. An electromagnet 18 is arranged on the side of each set of magnet blocks 4 away from the adjacent sliding column 5. Each set of electromagnets 18 is fixedly installed in the inner cavity of the adjacent slot 2. The two sets of contact blocks 12 are electrically connected to the multiple sets of electromagnets 18.

[0023] Initially, when installing the bearing outer ring 9, it is not yet inside the positioning ring seat 1. At this time, all sets of return springs 6 and arc-shaped spring sheets 17 are in normal condition. The arc-shaped clamp 7, soft protective layer 8, and guide wheel 15 are all located inside the positioning ring seat 1. When it is necessary to place the bearing outer ring 9 into the positioning ring seat 1, the movable rod 11 is pulled to the left. The movable rod 11 will drive the contact block 12 on it to move synchronously to the left. When the contact block 12 on the movable rod 11 contacts the contact block 12 at the bottom of the base plate 10, a conductive path is formed between them. This path is closed as a switching element in the control circuit. After closure, the control... The control circuit sends a conduction signal to the drive circuit of each group of electromagnets 18, which controls each group of electromagnets 18 to turn on. The electromagnets 18 and the magnet block 4 are designed with opposite poles. After the electromagnets 18 are turned on, they will attract the magnet block 4, which will drive the sliding column 5 to move towards the electromagnet 18 and squeeze the return spring 6, that is, move outward. At the same time as each group of sliding columns 5 moves, it will drive the arc-shaped clamping plate 7, the soft protective layer 8 and the rolling centering component on it to move synchronously and retract into the slot 2. At this time, the space between the inner cavities of the positioning ring seat 1 is opened for placing the bearing outer ring 9. Then the bearing outer ring 9 can be placed into the inner cavity of the positioning ring seat 1 and placed on each group of base plates 10. At this point, the pulling force applied to the movable rod 11 is released, causing the movable rod 11 to move to the right. The movable rod 11 moves to its initial position, causing the two sets of contact blocks 12 to move away from each other. This separation of the two sets of contact blocks 12 from the non-contact setting de-energizes each set of electromagnets 18. The magnet blocks 4 lose the magnetic attraction of the electromagnets 18. Under the force of the return spring 6, the return spring 6 returns to its initial state and pushes the arc-shaped clamping plate 7, the soft protective layer 8, and the rolling alignment assembly on it towards the outer ring 9 of the bearing, i.e., towards the inward side, via the sliding column 5. During this process, each set of guide wheels 15 will first contact the outer wall of the outer ring 9 of the bearing, and then... As the outer ring 9 of the bearing moves towards the center, it inevitably slides relative to each set of guide wheels 15. During this sliding process, the guide wheels 15 will rotate adaptively, changing the sliding friction force into rolling friction force. This achieves automatic centering before clamping and fixing the outer ring 9 of the bearing. By using rolling guidance instead of sliding clamping, the sliding friction during the centering process is fundamentally eliminated, completely avoiding mechanical damage to the outer wall of the outer ring 9 of the bearing and ensuring the integrity of the workpiece surface. Secondly, the low-friction rolling guidance mechanism ensures that the outer ring 9 of the bearing can move smoothly and accurately to the theoretical geometric center, significantly improving the accuracy and repeatability of automatic centering. After each set of guide wheels 15 quickly and automatically aligns the outer ring 9 of the bearing, as the slide column 5 continues to feed inward, the guide wheels 15 will be squeezed as they are already in contact with the outer wall of the outer ring 9. The guide wheels 15 will deflect accordingly in the inner cavity of the movable groove 13 through the movable plate 14 and squeeze the arc-shaped spring 17. Then, the slide column 5 will drive the soft protective layer 8 to gradually contact the outer wall of the aligned outer ring 9 through the arc-shaped clamping plate 7. At this time, the elastic force of the return spring 6 can automatically and elastically clamp and fix the outer ring 9 of the bearing. At the same time, it will adapt to the thermal expansion of the outer ring 9 of the bearing during the grinding process, ensuring the stability and compliance of the clamping. Then, the inner wall of the outer ring 9 of the bearing can be ground by the grinding device on the external machine tool.

[0024] like Figure 3 and Figure 4 As shown, a circular annular tube 19 is fixedly installed on the top of the positioning ring seat 1. An air inlet pipe 20 is fixedly installed on one side of the circular annular tube 19. L-shaped tubes 21 are evenly arranged above the circular annular tube 19. Cavities 23 are evenly opened inside the positioning ring seat 1. The bottom end of each group of L-shaped tubes 21 passes through the circular annular tube 19 and the positioning ring seat 1 and extends into the inner cavity of the adjacent cavity 23. Each group of L-shaped tubes 21 is rotatably installed with the circular annular tube 19 and the positioning ring seat 1. Each group of L-shaped tubes 21 is connected to the circular annular tube 19. A nozzle 22 is fixedly installed at the other end of each group of L-shaped tubes 21. Each group of nozzles 22 is located directly above the outer ring 9 of the bearing. An L-shaped plate 24 is fixedly installed at the bottom of each group of L-shaped tubes 21. A roller 25 is contacted at the inner angle of each group of L-shaped plates 24. A connecting rod 26 is rotatably installed at the bottom end of each group of rollers 25. The other end of each group of connecting rods 26 is fixedly installed with the adjacent sliding column 5.

[0025] In the initial state, each set of return springs 6 is in normal condition. The soft protective layer 8 and guide wheel 15 are located in the inner cavity of the positioning ring seat 1. At this time, each set of nozzles 22 is located directly above the inner cavity of the positioning ring seat 1 near the edge wall. Before the bearing outer ring 9 is placed into the positioning ring seat 1 for fixation, the electromagnet 18 is activated to attract the magnet block 4 and drive the sliding column 5 to move outward. While each set of sliding columns 5 moves outward, it will drive the connecting rod 26 to move synchronously. In the initial state, the roller 25 and the inner angle of the L-shaped plate 24 are in contact. When the connecting rod 26 moves outward, it will drive the roller 25 to move synchronously. The roller 25 will push the L-shaped plate 24. A clockwise deflection (view from above) causes the L-shaped plate 24 to rotate around the center of the L-shaped tube 21. The rollers 25 reduce friction during the deflection of the L-shaped plate 24. Simultaneously, the L-shaped plate 24 deflects, causing the nozzles 22 to rotate synchronously via the L-shaped tube 21. This moves the nozzles 22 above the inner cavity of the positioning ring seat 1, placing each set of nozzles 22 on the upper side of the top wall of the positioning ring seat 1. The space created on the upper side of the inner cavity of the positioning ring seat 1 allows the outer ring 9 of the bearing to be inserted. When the electromagnet 18 is closed, the return spring 6 returns to its initial state, causing the sliding column 5 to move inward, thus clamping and fixing the outer ring 9 of the bearing. As the sliding column 5 moves inward, it drives the roller 25 to move inward synchronously via the connecting rod 26. The roller 25 drives the L-shaped plate 24 to rotate counterclockwise (from a top view). At this time, the L-shaped plate 24 drives the nozzle 22 to deflect into the inner cavity of the positioning ring seat 1 near the edge wall, directly above the outer ring 9 of the bearing. This provides an unobstructed vertical entry path for the installation of the outer ring 9 of the bearing, ensuring smooth and reliable automated loading and unloading, preventing collision risks, and automatically deflecting the nozzle 22 back to its original position after installation, preparing for subsequent air blowing. The nozzle 22 is connected to the output end of the external blower. The blower, connected to the air inlet pipe 20, discharges gas into the annular pipe 19. The gas in the annular pipe 19 is then discharged downwards from the nozzle 22 through the L-shaped pipe 21 and acts on the top of the bearing outer ring 9. This allows newly generated or loose dry metal shavings to be "blown away" from the grinding point during the grinding process, preventing them from accumulating in the grinding area and on the upper surface of the bearing outer ring 9. It effectively prevents the detached shavings from re-attaching to the newly machined high-precision inner wall due to electrostatic adsorption or airflow disturbance, thus avoiding shaving scratches. At the same time, the airflow carries away some of the heat generated during grinding, providing some heat dissipation for the top of the bearing outer ring 9 and the area near the grinding zone.

[0026] like Figure 3As shown, a base 29 is fixedly installed at the bottom of the positioning ring seat 1, and a vertical pipe 30 is fixedly installed at the bottom of the base 29. The vertical pipe 30 is connected to the inner cavity of the positioning ring seat 1. A collection box 32 with a filter exhaust function is detachably installed at the bottom end of the vertical pipe 30. It is equipped with a filter structure that can trap grinding debris while allowing gas to pass through. A suction fan 31 is fixedly installed in the inner cavity of the vertical pipe 30.

[0027] During the grinding process, the suction fan 31 is turned on. The operation of the suction fan 31 generates suction in the inner cavity of the positioning ring seat 1 and discharges the sucked-in gas into the collection box 32 through the vertical pipe 30. Due to the suction of the suction fan 31, the gas and grinding debris generated during grinding will flow downward through the vertical pipe 30 into the collection box 32. The gas will be discharged after passing through the filter structure on the suction fan 31, while the grinding debris will be trapped in the collection box 32 for collection after passing through the filter structure on the suction fan 31. The combination of blowing from top to bottom and suction from bottom to top establishes a main airflow channel with a clear direction, which can realize the immediate and continuous removal and collection of grinding debris. This avoids the disorderly splashing or vortex accumulation of grinding debris caused by single blowing, which would cause secondary pollution and difficulty in cleaning. At the same time, by collecting the grinding debris into the collection box 32, the collection box 32 can be disassembled to remove the collected grinding debris. The collected pure metal grinding debris is easy to classify and package, and can be directly recycled as scrap steel, turning waste into treasure, reducing production costs, and conforming to the concept of circular economy.

[0028] like Figure 5 As shown, limit plates 33 are fixedly installed on the bottom of both the movable rod 11 and the base plate 10. An elastic rope 28 is fixedly installed between the two sets of limit plates 33. The initial state of the elastic rope 28 is the stretched state.

[0029] Each set of base plates 10 has steel balls 27 rolled on one side of its top, and each set of steel balls 27 is in contact with the bottom of the outer ring 9 of the bearing.

[0030] The elastic rope 28 is initially in a stretched state, which can elastically hold and fix the movable rod 11. When the movable rod 11 is pulled to move outward, the movable rod 11 will drive the limiting plate 33 at its bottom to move synchronously and stretch the elastic rope 28. When the tension on the movable rod 11 is released, under the force of the elastic rope 28, the elastic rope 28 will return to its initial state and pull the movable rod 11 to its initial position, achieving the effect of automatic reset. When the outer ring 9 of the bearing is placed on the inner bottom plate 10 of the positioning ring seat 1, the bottom of the outer ring 9 of the bearing will be placed on the top of the steel ball 27. At this time, the outer ring 9 of the bearing will be in a non-aligned state. During the process of the guide wheel 15 pushing the outer ring 9 of the bearing to be aligned, the movement of the outer ring 9 of the bearing will be on the steel ball 27. By setting the steel ball 27, the moving friction of the outer ring 9 of the bearing is changed to rolling friction, which can avoid wear of the outer ring 9 of the bearing during movement.

[0031] like Figures 5 to 7As shown, the materials of each soft protective layer 8 are selected from polyamide, polyoxymethylene, polytetrafluoroethylene, copper alloy or combinations thereof, and each soft protective layer 8 has anti-slip texture on the side near the outer ring 9 of the bearing.

[0032] The distance between the bottom limiting plate 33 of the movable rod 11 and the inner wall of the positioning ring seat 1 is equal to the distance between the two sets of contact blocks 12 on the same side. The inner included angle of each set of L-shaped plates 24 is set at 90 degrees, and the outer included angle is a rounded chamfer. The two outer edges of the plates extend in a perpendicular direction.

[0033] The soft protective layer 8, made of soft material, possesses a certain degree of elasticity or plastic deformation capability. When clamped, the soft protective layer 8 can deform slightly to better conform to the microscopic contours of the workpiece's outer wall. Simultaneously, it exhibits certain damping characteristics, absorbing and attenuating minute vibrations generated during clamping or grinding. The anti-slip texture increases static friction to resist grinding cutting forces, further preventing the bearing outer ring 9 from slipping or rotating during machining. Furthermore, the bottom limiting plate 33 of the movable rod 11 prevents slippage when the movable rod 11 is pulled outwards. When the limiting plate 33 is attached to the inner wall of the positioning ring seat 1, the two sets of contact blocks 12 will be in contact and aligned. In the initial state, the outer wall of the L-shaped tube 21 located in the cavity 23 is in contact with the inner wall of the cavity 23, and one outer vertical wall of the L-shaped plate 24 is in contact with the inner wall of the cavity 23. When the roller 25 pushes the L-shaped plate 24 to deflect, the other outer vertical wall of the L-shaped plate 24 will contact the inner wall of the cavity 23, so that the L-shaped plate 24 can only deflect 90 degrees each time. After the L-shaped plate 24 deflects, the roller 25 can continue to move without being affected.

[0034] Working principle: First, the base 29 is fixed on the machine tool. When the outer ring 9 of the bearing is clamped, the movable rod 11 is pulled to move outward, causing the two contact blocks 12 to release control. Multiple sets of electromagnets 18 are activated simultaneously. The electromagnets 18 attract the magnet block 4, which drives the slide column 5 to move outward and compress the return spring 6, so that the soft protective layer 8 and the guide wheel 15 are moved into the slot 2. At the same time, the movement of the slide column 5 will drive the L-shaped plate 24 to deflect through the roller 25, so that the L-shaped tube 21 drives the nozzle 22 to deflect out of the inner cavity of the positioning ring seat 1. At this time, the positioning ring is activated. The inner cavity of the ring seat 1 is left empty, allowing the outer ring 9 of the bearing to be placed inside the inner cavity of the positioning ring seat 1 and positioned on top of each set of steel balls 27. Then, the tension on the movable rod 11 is released, and the elastic rope 28 will drive the movable rod 11 to reset. The two contact blocks 12 moving away will cause multiple sets of electromagnets 18 to be de-energized simultaneously. The return spring 6 will push the slide column 5 to move inward, and multiple sets of guide wheels 15 will first contact the outer wall of the outer ring 9 of the bearing, which can push the outer ring 9 of the bearing towards the center, achieving rapid center positioning. Immediately afterwards, the return spring 6 continues to push the slide column 5 to feed, guiding... When the roller 15 is pushed, it will compress the arc-shaped spring 17. The arc-shaped clamp 7 will cause the soft protective layer 8 to adhere to the outer wall of the bearing outer ring 9, achieving elastic clamping and fixation. At the same time, the roller 25 will drive the L-shaped tube 21 to deflect back through the L-shaped plate 24. At this time, multiple nozzles 22 will be placed directly above the bearing outer ring 9. Then, the inner wall of the bearing outer ring 9 can be ground by the grinding device on the external machine tool. During the grinding process, air is blown into the air inlet pipe 20 by the external blower. The gas passes through the L-shaped tube 21 in the annular tube 19 and finally exits from the nozzle 2. 2. The exhaust force acts on the top of the bearing outer ring 9, while the suction fan 31 is turned on to form a downward suction force inside the positioning ring seat 1. The combination of upward blowing and downward suction can make a stable gas flow path to cool the bearing outer ring 9. At the same time, the grinding debris is stably sucked into the collection box 32 for recycling. When it is necessary to remove the grinding debris from the collection box 32, the collection box 32 can be disassembled. After grinding is completed, the movable rod 11 is pulled outward again to complete the steps before putting the bearing outer ring 9 in, so that the ground bearing outer ring 9 can be taken out.

[0035] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A ball bearing grinding device, comprising a positioning ring seat (1), wherein the inner cavity of the positioning ring seat (1) is uniformly provided with slots (2). Its features are: Also includes: The clamping assembly includes a support plate (3) fixedly installed in each of the slots (2), a magnet block (4) is slidably installed on each of the support plates (3), a sliding column (5) is fixedly installed at one end of each of the magnet blocks (4), each of the sliding columns (5) is slidably installed in the inner cavity of the adjacent slot (2), a return spring (6) is fixedly installed between each of the sliding columns (5) and the adjacent support plate (3), an arc-shaped clamping plate (7) is fixedly installed on the other side of each of the sliding columns (5), a soft protective layer (8) is fixedly installed on the other side of each of the arc-shaped clamping plates (7), a bearing outer ring (9) is contacted between each of the soft protective layers (8), and a rolling centering component is provided on each of the arc-shaped clamping plates (7).

2. The ball bearing grinding device according to claim 1, characterized in that: The rolling centering assembly includes movable grooves (13) formed on both sides of the sliding column (5) and the arc-shaped clamping plate (7). Movable plates (14) are rotatably installed in the inner cavity of each set of movable grooves (13). Guide wheels (15) are rotatably installed at the other end of each set of movable plates (14). Each set of guide wheels (15) is in contact with the outer wall of the outer ring (9) of the bearing. Fixed plates (16) are fixedly installed on both sides of each set of sliding columns (5). Arc-shaped springs (17) are fixedly installed between each set of fixed plates (16) and the adjacent movable plates (14). The bearing outer ring (9) is uniformly provided with a base plate (10) on its lower side. Each set of base plates (10) is fixedly installed in the inner cavity of the positioning ring seat (1). One set of base plates (10) is provided with a movable rod (11) on its lower side. The movable rod (11) is slidably installed in the positioning ring seat (1). The movable rod (11) and the opposite side of the adjacent base plate (10) are fixedly installed with contact blocks (12). Each set of magnet blocks (4) is provided with an electromagnet (18) on the side away from the adjacent sliding column (5). Each set of electromagnets (18) is fixedly installed in the inner cavity of the adjacent slot (2). The two sets of contact blocks (12) are electrically connected to the multiple sets of electromagnets (18).

3. The ball bearing grinding device according to claim 2, characterized in that: A circular annular tube (19) is fixedly installed on the top of the positioning ring seat (1), and an air inlet pipe (20) is fixedly installed on one side of the circular annular tube (19). L-shaped tubes (21) are evenly arranged above the circular annular tube (19). Holes (23) are evenly opened inside the positioning ring seat (1). The bottom ends of each group of L-shaped tubes (21) penetrate the circular annular tube (19) and the positioning ring seat (1), and extend to the inner cavity of the adjacent cavity (23). Each group of L-shaped tubes (21) is rotatably installed with the circular annular tube (19) and the positioning ring seat (1). The L-shaped tubes (21) are all connected to the annular tubes (19). The other end of each group of L-shaped tubes (21) is fixedly installed with a nozzle (22). Each group of nozzles (22) is located directly above the outer ring (9) of the bearing. The bottom of each group of L-shaped tubes (21) is fixedly installed with an L-shaped plate (24). Rollers (25) are contacted at the inner angle of each group of L-shaped plates (24). A connecting rod (26) is rotatably installed at the bottom end of each group of rollers (25). The other end of each group of connecting rods (26) is fixedly installed with the adjacent sliding column (5).

4. The ball bearing grinding device according to claim 2, characterized in that: A base (29) is fixedly installed at the bottom of the positioning ring seat (1), and a vertical pipe (30) is fixedly installed at the bottom of the base (29). The vertical pipe (30) is connected to the inner cavity of the positioning ring seat (1). A collection box (32) with a filter exhaust function is detachably installed at the bottom end of the vertical pipe (30). It is provided with a filter structure that can trap grinding debris while allowing gas to pass through. A suction fan (31) is fixedly installed in the inner cavity of the vertical pipe (30).

5. The ball bearing grinding device according to claim 2, characterized in that: Both the movable rod (11) and the bottom of the base plate (10) are fixedly installed with limit plates (33), and an elastic rope (28) is fixedly installed between the two sets of limit plates (33). The initial state of the elastic rope (28) is a stretched state.

6. The ball bearing grinding device according to claim 2, characterized in that: Each set of base plates (10) has a steel ball (27) rolled on one side of its top, and each set of steel balls (27) is in contact with the bottom of the outer ring (9) of the bearing.

7. The ball bearing grinding device according to claim 1, characterized in that: The soft protective layer (8) of each group is made of polyamide, polyoxymethylene, polytetrafluoroethylene, copper alloy or a combination thereof, and the soft protective layer (8) of each group is provided with anti-slip texture on the side near the outer ring (9) of the bearing.

8. The ball bearing grinding device according to claim 5, characterized in that: The distance between the limiting plate (33) at the bottom of the movable rod (11) and the inner wall of the positioning ring seat (1) is equal to the distance between the two sets of contact blocks (12) on the same side. The inner included angle of each set of L-shaped plates (24) is set at 90 degrees, and the outer included angle is a rounded chamfer. The two outer edges extend in a perpendicular direction.

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