A bearing ring polishing device for bearing production

Abstract

This invention provides a bearing ring polishing device for bearing production, belonging to the field of polishing technology. The device includes a worktable and further comprises: a polishing unit mounted on the worktable in the raceway region between the outer and inner rings of the bearing; an expansion unit disposed inside the polishing unit for expanding and driving the polishing unit to conform to the inner surface of the raceway; and an upper fixing unit disposed below the worktable for positioning the outer ring at the position of the expansion unit. By using an expandable bladder to drive a flexible polishing belt to tightly conform to the arc-shaped raceway between the outer and inner rings of the bearing, combined with the inclined arrangement of the polishing belt causing the bearing ring to rotate during polishing, this effectively solves the problem that traditional polishing devices cannot adapt to polishing concave and complex-shaped raceways, eliminates polishing dead angles, and improves polishing uniformity and surface quality.

Description

Technical Field

[0001] This invention belongs to the field of polishing technology, and specifically relates to a bearing ring polishing device for bearing production. Background Technology

[0002] Bearings are components that fix and reduce the coefficient of friction of loads during mechanical transmission. In other words, when other machine parts move relative to each other on a shaft, they are used to reduce the coefficient of friction during power transmission and keep the center position of the shaft fixed. Bearings are a crucial component in modern mechanical equipment. Their main function is to support rotating mechanical bodies and reduce the coefficient of friction of mechanical loads during transmission.

[0003] Chinese patent CN111002209B discloses a bearing polishing device, including a polishing roller and a drive roller arranged opposite each other on a base. The drive roller is movably mounted on the base. An adjustment mechanism adjusts the distance and relative position between the drive roller and the polishing roller. A guiding mechanism for guiding the bearing ring is provided below the area between the polishing roller and the drive roller. The guiding mechanism includes a guide plate arranged vertically on a plate surface. The length direction of the guide plate is consistent with the length direction of the polishing roller. The guide plate is lifted and mounted on the base. A locking assembly A is provided on the base to lock the guide plate. For bearing rings of different diameters, this patent only requires adjusting the distance and relative position between the drive roller and the polishing roller through the adjustment mechanism, making the operation relatively simple.

[0004] The raceway between the inner and outer rings of a bearing is the working surface on which the steel balls roll. This raceway has a concave structure, making it difficult for ordinary polishing equipment to effectively polish it. In particular, the raceway shape of angular contact bearings is more complex, further increasing the polishing difficulty. The technical solutions proposed in the above literature can only polish the outer surface of the bearing outer ring and cannot be applied to the polishing of the bearing raceway, let alone effectively polish the complex-shaped raceway. Summary of the Invention

[0005] The purpose of this invention is to provide a bearing ring polishing device for bearing production, which aims to solve the problem that existing bearing polishing devices can only polish the outer surface of the bearing outer ring and cannot be adapted to polishing the raceway of angular contact bearings.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a bearing ring polishing device for bearing production, comprising: a worktable, and further comprising: a polishing unit mounted on the worktable, located in the raceway region between the outer and inner rings of the bearing; an expansion unit disposed inside the polishing unit, used to expand and drive the polishing unit to conform to the inner surface of the raceway, thereby achieving adaptive and precise fitting between the polishing unit and the complex raceway shape, completely eliminating polishing dead angles; an upper fixing unit disposed below the worktable, used to position the outer ring at the position of the expansion unit; and a lower fixing unit disposed on the worktable, used to position the inner ring at the position of the expansion unit, thereby accurately aligning the inner and outer rings in the assembly state, laying a benchmark for subsequent synchronous polishing.

[0007] A further technical solution of the present invention is that the polishing unit includes an L-shaped frame, which is slidably mounted on a worktable. A tensioning component is provided on its vertical part. Rollers are provided at the bottom of the tensioning component and the vertical part of the L-shaped frame. A polishing belt is wound around two rollers. A first motor is provided on the L-shaped frame to drive one of the rollers to rotate. The tensioning component includes a sliding plate and an elastic element for maintaining the tension of the polishing belt.

[0008] Its effect is to ensure that the polishing belt is always in a stable and taut state during the working process, so as to guarantee the uniform transmission of polishing force and the consistency of polishing effect.

[0009] A further technical solution of the present invention is that the polishing unit is configured as a plurality of units and is evenly distributed in a ring around the raceway of the bearing to be polished, and the vertical part of the L-shaped frame is inclined relative to the worktable.

[0010] The effect is that the inclined arrangement causes the polishing belt to generate a tangential force on the raceway, driving the bearing ring to rotate during operation, thereby achieving uniform polishing of the entire circumferential raceway, while also facilitating the smooth discharge of grinding debris.

[0011] A further technical solution of the present invention is that the polishing belt includes a metal mesh and a polishing sponge, wherein the metal mesh is disposed facing the roller and the polishing sponge is disposed facing the raceway.

[0012] Its effects are as follows: the metal mesh layer provides structural support and strength to prevent the belt from breaking; the outer flexible polishing sponge can perfectly fit the roller track surface to achieve efficient and damage-free fine polishing.

[0013] A further technical solution of the present invention is that the expansion unit includes a bladder, which is disposed inside the polishing belt. A tube is passed through and connected to the bladder. One end of the tube is sealed, and the other end is provided with a flexible tube through a rotary joint for injecting fluid into the bladder.

[0014] Its effect is that the bladder expands uniformly through fluid pressure, which can steplessly and flexibly push the polishing belt to the surface of the raceway, adapting to raceways of different sizes and shapes, and the expansion force is controllable, avoiding overload damage to the workpiece.

[0015] A further technical solution of the present invention is that the surface of the capsule is provided with pinholes for allowing the injected coolant to seep out to the polishing sponge.

[0016] Its effect is to enable the coolant to penetrate directly and continuously from the back of the polishing belt to the polishing contact surface, providing efficient cooling and lubrication to the polishing area, avoiding local overheating and further assisting in chip removal.

[0017] A further technical solution of the present invention is that the upper fixing unit includes a vertical plate and a lead screw disposed on one side of the vertical plate. A second motor for driving the lead screw to rotate is provided on the worktable. The lead screw is located between the vertical plate and the outer ring. A limiting plate is threadedly connected to the upper part of the lead screw. A ball is rotatably disposed at the end of the limiting plate away from the vertical plate and abuts against the upper part of the outer ring. Two limiting protrusions are provided on the upper part of the vertical plate, and there is a gap between the two limiting protrusions. When the limiting plate abuts against one of the limiting protrusions, the ball is located above the outer ring. When the limiting plate abuts against the other limiting protrusion, the ball moves out from the upper part of the outer ring.

[0018] A further technical solution of the present invention is that the lower fixing unit includes a telescopic component and a frustum-shaped turntable, the turntable being rotatably disposed at the telescopic end of the telescopic component, for receiving and positioning inner rings of different sizes.

[0019] A further technical solution of the present invention is that the workbench is provided with a feeding plate, and a collection tank is provided below the feeding plate for collecting the coolant flowing down during the polishing process.

[0020] A further technical solution of the present invention is that the L-shaped frame of the polishing unit is connected to the fixed frame by a screw, and the radial distance between multiple polishing units can be adjusted by rotating the screw.

[0021] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting an expandable bladder to drive the flexible polishing belt to fit tightly against the arc-shaped raceway between the outer and inner rings of the bearing, and by combining the inclined arrangement of the polishing belt to make the bearing ring rotate during the polishing process, the problem that traditional polishing devices cannot adapt to the polishing of concave and complex-shaped raceways is effectively solved, eliminating polishing dead angles and improving polishing uniformity and surface quality.

[0022] 2. The pinholes on the surface of the bearing housing allow coolant to penetrate directly into the polishing contact surface, achieving continuous cooling of the polishing area and preventing local overheating. At the same time, the inclined polishing belt can drive the grinding debris out along the belt surface, preventing the accumulated debris from scratching the raceway surface, thereby improving polishing efficiency while ensuring the machining integrity of the bearing ring.

[0023] 3. This invention achieves in-situ synchronous polishing of the inner and outer raceways of the bearing. By performing one-time collaborative processing on the raceways in the assembled state, it ensures that the paired raceways are formed under the same process conditions, significantly improving the clearance consistency, rotational accuracy and running stability of the finished bearing, and realizing a technological breakthrough from single surface processing to core fit performance assurance.

[0024] 4. This invention uses a fluid-driven flexible capsule to replace the traditional rigid expansion mechanism, which realizes the stepless smooth fit of the polishing belt to complex curved surfaces and completely eliminates polishing dead angles. At the same time, the self-limiting characteristics of fluid pressure constitute an inherent overload protection mechanism, which effectively prevents the mechanism from jamming and the workpiece from being damaged, and greatly improves the safety and adaptability of the equipment. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of a specific embodiment of the present invention; Figure 2 This is an isometric sectional view of a specific embodiment of the present invention; Figure 3 This is a schematic diagram of the polishing unit in a specific embodiment of the present invention; Figure 4 for Figure 2 Enlarged structural diagram at point A; Figure 5 for Figure 2 Enlarged structural diagram at point B; Figure 6 This is a schematic diagram of the connection between the hose and the pipe body in a specific embodiment of the present invention; Figure 7 This is a front view of a specific embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the fixing unit in a specific embodiment of the present invention; Figure 9 This is a schematic diagram of the cyst structure in a specific embodiment of the present invention; Figure 10 This is a schematic diagram of the polishing belt structure in a specific embodiment of the present invention.

[0026] In the diagram: 1. Workbench; 2. Upper fixing unit; 3. Lower fixing unit; 4. Polishing unit; 5. Expansion unit; 6. Outer ring; 7. Inner ring; 11. Feeding plate; 12. Fixing frame; 13. Collection trough; 14. Discharge hole; 21. Vertical plate; 22. Lead screw; 23. Limiting plate; 24. Limiting protrusion; 25. Ball bearing; 26. Second motor; 31. Telescopic component; 32. Turntable; 41. L-shaped frame; 42. Screw; 43. Tensioning component; 44. Roller; 45. Polishing belt; 46. First motor; 47. Transmission structure; 51. Bag body; 52. Tube body; 53. Through hole; 54. Flexible hose; 431. Slide groove; 432. Slide plate; 433. Elastic component; 451. Metal mesh; 452. Polishing sponge; 511. Pinhole. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figures 1-10 The present invention provides the following technical solution: a bearing ring polishing device for bearing production, comprising a worktable 1, an upper fixing unit 2, a lower fixing unit 3, a polishing unit 4, and an expansion unit 5.

[0029] The upper fixing unit 2, the lower fixing unit 3, and the polishing unit 4 are all installed on the worktable 1. The upper fixing unit 2 is used to position the outer ring 6 of the bearing, and the lower fixing unit 3 is used to position the inner ring 7 of the bearing. The polishing unit 4 is located between the raceways of the outer ring 6 and the inner ring 7 of the bearing. The expansion unit 5 is installed on the polishing unit 4 and is located between the raceways of the outer ring 6 and the inner ring 7 of the bearing. In use, the upper fixing unit 2 and the lower fixing unit 3 are used to position the outer ring 6 and the inner ring 7 of the bearing at the position of the expansion unit 5. Then the expansion unit 5 expands, opens up the polishing unit 4, and fits it into the raceways of the outer ring 6 and the inner ring 7 of the bearing. Then the polishing unit 4 starts to perform the polishing operation.

[0030] Please see Figure 1 The workbench 1 has a table surface on top, and the upper fixing unit 2 and polishing unit 4 are both installed on the table surface. The loading plate 11 is set below the table surface, and the lower fixing unit 3 is installed below the loading plate 11. The inner ring 7 is placed in the loading plate 11, and then the lower fixing unit 3 is run, which can drive the inner ring 7 to move upward to the expansion unit 5.

[0031] Please see Figure 2The lower fixing unit 3 includes a telescopic member 31 installed below the upper plate 11. The telescopic end of the telescopic member 31 passes through the upper part of the upper plate 11, and a turntable 32 is provided at the telescopic end of the telescopic member 31 through a bearing, so that the turntable 32 can rotate relative to the telescopic member 31. The turntable 32 is in the shape of a frustum, and the inner ring 7 is placed on the turntable 32 and in contact with the inclined surface of the turntable 32. Then, the telescopic member 31 is activated, which can drive the inner ring 7 to move upward and move the inner ring 7 to the position of the expansion unit 5. By setting the inclined surface of the turntable 32, different sizes of inner rings 7 can be used, which improves the applicability range.

[0032] Please see Figure 1 and Figure 3 The polishing unit 4 is provided in 3-4 groups, which are evenly distributed in a ring. The inner ring 7 is located in the middle of the multiple polishing units 4, and the outer ring 6 is located outside the multiple polishing units 4, so that the polishing unit 4 is clamped in the raceway between the inner ring 7 and the outer ring 6. The polishing unit 4 includes an L-shaped frame 41 installed on the table surface of the worktable 1. A slide rail is provided on the table surface of the worktable 1, and the L-shaped frame 41 is slidably mounted on the slide rail, so that multiple L-shaped frames 41 can move closer to each other or further away from each other. A fixed frame 12 is fixedly installed on the worktable 1, and a screw 42 is rotatably mounted on the fixed frame 12. The screw 42 is threadedly connected to the L-shaped frame 41, and the length direction of the screw 42 is consistent with the sliding direction of the L-shaped frame 41. By rotating the screw 42, the L-shaped frame 41 can be controlled to slide on the slide rail, thereby adjusting the distance between multiple L-shaped frames 41.

[0033] Please see Figure 2 , Figure 3 and Figure 4 The polishing unit 4 also includes a tensioning component 43 slidably disposed on the vertical part of the L-shaped frame 41. Rollers 44 are disposed at the bottom of the vertical part of the L-shaped frame 41 and on the tensioning component 43. Polishing belts 45 are disposed on the two rollers 44. The tensioning component 43 can stretch and tension the polishing belts 45. A first motor 46 is disposed on the horizontal part of the L-shaped frame 41. A transmission structure 47 is disposed at the output end of the first motor 46. The transmission structure 47 is connected to the rollers 44 at the bottom, so that the first motor 46 drives the rollers 44 to rotate through the transmission structure 47.

[0034] Please see Figure 4 The tensioning component 43 includes a groove 431 formed in the vertical part of the L-shaped frame 41. The top of the groove 431 is open. A slide plate 432 is slidably arranged inside the groove 431. A roller 44 is arranged on the slide plate 432. An elastic element 433 is provided inside the groove 431 to push the slide plate 432 out of the groove 431. The polishing belt 45 can be tensioned by the action of the elastic element 433, thereby ensuring the polishing effect.

[0035] Please see Figure 10 The polishing belt 45 is located between the outer ring 6 and the inner ring 7. The expansion unit 5 can laterally expand the polishing belt 45 so that it fits into the raceway of the outer ring 6 and the inner ring 7. Then the polishing belt 45 moves to polish the raceway of the outer ring 6 and the inner ring 7. The polishing belt 45 is composed of a metal mesh 451 and a polishing sponge 452. The metal mesh 451 contacts the roller 44 and can improve the strength of the polishing belt 45 to prevent it from breaking. The polishing sponge 452 contacts the outer ring 6 and the inner ring 7 and polishes the raceway of the outer ring 6 and the inner ring 7. At the same time, the polishing sponge 452 is flexible and perfectly fits the arc surface of the raceway, avoiding the occurrence of polishing dead corners.

[0036] Please see Figure 7 All polishing units 4 are inclined. Specifically, the vertical part of the L-shaped frame 41 is rotated 10-20 degrees around the horizontal part of the frame, so that the vertical part of the L-shaped frame 41 is inclined. When the polishing belt 45 moves, it can polish the raceways of the outer ring 6 and the inner ring 7. At the same time, the polishing belt 45 is also inclined, so that the outer ring 6 and the inner ring 7 are subjected to the inclined force, causing the inner ring 7 and the outer ring 6 to rotate under the force, thereby polishing one circumference of the outer ring 6 and the inner ring 7. At the same time, the polishing belt 45 can also quickly discharge the polishing debris during polishing, avoiding the accumulation of debris and scratches on the raceway.

[0037] Please see Figure 5 and Figure 6 The expansion unit 5 includes a bladder 51, which is located inside the polishing belt 45, specifically on the side of the polishing belt 45 near the metal mesh 451. A tube 52 is provided in the middle of the bladder 51. Both ends of the tube 52 are rotatably mounted on the L-shaped frame 41, with one end being sealed and the other end being provided with a flexible hose 54 via a rotary joint. The flexible hose 54 extends downward along the L-shaped frame 41 and connects to the pump body (not shown in the figure). The portion of the tube 52 located in the bladder 51 is provided with a through hole 53 that communicates with the bladder 51, and the bladder 51 is fixed to the tube 52. The material of the bladder 51 is rubber.

[0038] In use, the pump is started, injecting fluid into the bladder 51 through the hose 54 and tube 52, causing the bladder 51 to expand. This simultaneously causes the polishing belt 45 to open and adhere to the raceways of the inner ring 7 and outer ring 6. Due to the flexibility of the bladder 51, the polishing belt 45 can be adapted to raceways of different sizes and complex shapes. The polishing belt 45 then polishes the inner ring 7 and outer ring 6. The bladder 51 is located in the middle of the polishing belt 45, so the friction between the bladder 51 and the polishing belt 45 causes the bladder 51 to rotate, which in turn causes the tube 52 to rotate. This avoids wear on the bladder 51 caused by friction between the polishing belt 45 and the bladder 51. The tube 52 is connected to the hose 54 through a rotary joint, which prevents the rotation of the tube 52 from causing the hose 54 to rotate.

[0039] Please see Figure 9 The capsule 51 is provided with a pinhole 511 that penetrates the interior of the capsule 51. The fluid injected into the capsule 51 is coolant. Under the pressure of the pump, the coolant is injected into the capsule 51 and squeezed out from the pinhole 511. The squeezed-out coolant penetrates to the side of the polishing sponge 452 that contacts the raceway, thereby cooling the polished surface covered by the inner ring 7 and the outer ring 6 to a certain extent and avoiding the situation where the cooling blind area cannot be cooled.

[0040] Please see Figure 7 and Figure 8 The upper fixing unit 2 has two sets, symmetrically arranged on both sides of the inner ring 7 and the outer ring 6. It includes a vertical plate 21 fixed to the worktable 1 surface by screws, and a lead screw 22 rotatably mounted on the worktable 1. Both the vertical plate 21 and the lead screw 22 are perpendicular to the worktable 1 surface. A second motor 26 is provided below the worktable 1 surface to drive the lead screw 22 to rotate. The lead screw 22 is located between the vertical plate 21 and the outer ring 6. A limit plate 23 is threadedly connected to the upper part of the lead screw 22. The limit plate 23 is away from the vertical plate 21. One end of the plate is provided with a ball bearing 25, which rotates below the limiting plate 23 and abuts against the top of the outer ring 6. Two limiting protrusions 24 are provided on the top of the upright plate 21, and there is a gap between the two limiting protrusions 24. One end of the limiting plate 23 can abut against the two limiting protrusions 24. When the limiting plate 23 abuts against one of the limiting protrusions 24, the ball bearing 25 is located above the outer ring 6. When the limiting plate 23 abuts against the other limiting protrusion 24, the ball bearing 25 moves out from above the outer ring 6.

[0041] In operation, coolant is first injected into the bladder 51 via the pump body, causing the bladder 51 to expand. Then, the distance between multiple polishing units 4 is adjusted by the bearing size. The inner ring 7 is placed on the loading plate 11, and the lower fixing unit 3 pushes the inner ring 7 upwards to the bladder 51, compressing it. Next, the outer ring 6 is fed from above the polishing unit 4, causing it to move downwards to the bladder 51 and compress it, deforming the bladder 51. The second motor 26 drives the lead screw 22 to rotate, causing the limiting plate 23 to abut against the limiting protrusion 24 on one side. At this time, the ball bearing 25 is positioned above the outer ring 6. Because the limiting protrusion 24 limits the rotation of the limiting plate 23, the rotation of the lead screw 22 causes the limiting plate 23 to move downwards, thus causing the ball bearing 25 to abut against the top of the outer ring 6. After the upper fixing unit 2 limits the outer ring 6 of the bearing, the pump body again injects coolant into the bladder 51. Coolant is injected to further expand the capsule 51, making the polishing belt 45 fit more tightly against the raceway. Then, the polishing belt 45 is rotated, causing the side of the polishing belt 45 that is in contact with the outer ring 6 to move obliquely upward, thus preventing the outer ring 6 from moving downward over the capsule 51. Under the action of the upper fixing unit 2, the upward movement of the outer ring 6 is restricted. Under the tilting action of the polishing belt 45, the outer ring 6 rotates. The ball bearings 25 on the upper fixing unit 2 can effectively reduce the friction between the outer ring 6 and the limiting plate 23 when it rotates. The side that is in contact with the inner ring 7 moves obliquely downward. The lower fixing unit 3 can limit the inner ring 7. Under the tilting action of the polishing belt 45, the inner ring 7 rotates. At the same time, the bearing on the lower fixing unit 3 can reduce the resistance when the inner ring 7 rotates. After polishing is completed, the upper fixing unit 2 is opened, and the outer ring 6 is removed from above. The lower fixing unit 3 is moved downward, and the inner ring 7 is removed from below, completing the polishing.

[0042] A collection tank 13 is provided below the feeding plate 11, and a protrusion is provided at the edge of the feeding plate 11 so that the coolant dripping from the polishing belt 45 flows into the interior of the collection tank 13. A discharge hole 14 is provided on one side of the collection tank 13 so that the collected coolant can be discharged from the collection tank 13.

Claims

1. A bearing ring polishing apparatus for bearing production, comprising: The workbench (1) is characterized by further comprising: The polishing unit (4) is installed on the worktable (1) and is located in the raceway area between the outer ring (6) and the inner ring (7) of the bearing; The expansion unit (5) is disposed inside the polishing unit (4) and is used to expand and drive the polishing unit (4) to fit against the inner surface of the raceway; The upper fixing unit (2) is set below the worktable (1) and is used to position the outer ring (6) at the position of the expansion unit (5); The lower fixing unit (3) is set on the worktable (1) and is used to position the inner ring (7) at the position of the expansion unit (5).

2. The bearing ring polishing device for bearing production according to claim 1, characterized in that: The polishing unit (4) includes an L-shaped frame (41), which is slidably mounted on the worktable (1). A tensioning component (43) is provided on its vertical part. Rollers (44) are provided at the bottom of the tensioning component (43) and the vertical part of the L-shaped frame (41). Polishing belts (45) are wound around the two rollers (44). A first motor (46) is provided on the L-shaped frame (41) to drive one of the rollers (44) to rotate. The tensioning component (43) includes a slide plate (432) and an elastic element (433) for maintaining the tension of the polishing belt (45).

3. A bearing ring polishing device for bearing production according to claim 2, characterized in that: The polishing unit (4) is configured as multiple units and is evenly distributed in a ring around the raceway of the bearing to be polished. The vertical part of the L-shaped frame (41) is inclined relative to the worktable (1).

4. A bearing ring polishing device for bearing production according to claim 2, characterized in that: The polishing belt (45) includes a metal mesh (451) and a polishing sponge (452), the metal mesh (451) being disposed facing the roller (44) and the polishing sponge (452) being disposed facing the raceway.

5. A bearing ring polishing device for bearing production according to claim 1, characterized in that: The expansion unit (5) includes a bladder (51) which is located inside the polishing belt (45). A tube (52) runs through and connects to the bladder (51). One end of the tube (52) is sealed, and the other end is provided with a flexible tube (54) through a rotary joint for injecting fluid into the bladder (51).

6. A bearing ring polishing device for bearing production according to claim 5, characterized in that: The surface of the capsule (51) is provided with pinholes (511) for allowing the injected coolant to seep out to the polishing sponge (452).

7. A bearing ring polishing device for bearing production according to claim 1, characterized in that: The upper fixing unit (2) includes a vertical plate (21) and a lead screw (22) disposed on one side of the vertical plate (21). A second motor (26) is provided on the worktable (1) to drive the lead screw (22) to rotate. The lead screw (22) is located between the vertical plate (21) and the outer ring (6). A limit plate (23) is threadedly connected to the upper part of the lead screw (22). A ball (25) is rotatably disposed at the end of the limit plate (23) away from the vertical plate (21) and abuts against the upper part of the outer ring (6). Two limit protrusions (24) are provided on the upper part of the vertical plate (21), and there is a gap between the two limit protrusions (24). When the limit plate (23) abuts against one of the limit protrusions (24), the ball (25) is located above the outer ring (6). When the limit plate (23) abuts against the other limit protrusion (24), the ball (25) moves out from the upper part of the outer ring (6).

8. A bearing ring polishing device for bearing production according to claim 1, characterized in that: The lower fixing unit (3) includes a telescopic component (31) and a frustum-shaped turntable (32). The turntable (32) is rotatably mounted on the telescopic end of the telescopic component (31) and is used to receive and position inner rings (7) of different sizes.

9. A bearing ring polishing device for bearing production according to claim 1, characterized in that: The workbench (1) is provided with a feeding plate (11), and a collection tank (13) is provided below the feeding plate (11) for collecting the coolant flowing down during the polishing process.

10. A bearing ring polishing device for bearing production according to claim 1, characterized in that: The L-shaped frame (41) of the polishing unit (4) is connected to the fixed frame (12) by a screw (42). The radial distance between multiple polishing units (4) can be adjusted by rotating the screw (42).

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