A grinding device and grinding process for superfinishing of bearing rings

Abstract

This application relates to the technical field of superfinishing equipment for bearing rings, and discloses a grinding device and a grinding process for superfinishing bearing rings, including a swing arm. One end of the swing arm is fixedly connected with a fixed seat. A clamping block is slidably connected inside the fixed seat. An oilstone is arranged inside the clamping block. A pressing block for fixing the oilstone is movably arranged on one side of the clamping block. In the process of the clamping block driving the fastening gear and the adjusting gear to move synchronously, the fastening gear and the adjusting gear sequentially contact the corresponding first tooth plate and second tooth plate. Thus, when the pressing block releases the clamping and locking of the oilstone, the length of the oilstone extending out of the clamping block is adjusted, and during the process of the clamping block moving towards the outside of the fixed seat, the clamping and fixing action of the oilstone and the moving-away action of the adjusting rod are sequentially and continuously completed, improving the service life of the grinding device and ensuring the grinding quality of the bearing ring.

Description

Technical Field

[0001] The present application relates to the technical field of bearing ring superfinishing equipment, and particularly relates to a grinding device and a grinding process for bearing ring superfinishing. Background Art

[0002] During the processing of bearing rings, it is necessary to use a bearing superfinishing machine to grind the arc surface or groove of the preliminarily polished bearing ring. The existing bearing superfinishing machine includes a bearing clamping device. The bearing clamping device clamps and fixes the bearing ring to be polished and drives the bearing ring to rotate. The driving component drives the swing mechanism to move to the grinding position. The swing mechanism drives the oilstone to abut against the bearing ring and completes grinding through high swing. The swing mechanism includes a swing arm. One side of the swing arm is fixedly provided with an oilstone clamp. An oilstone pressing block is movably arranged inside the oilstone clamp. The pressing block is pressed against one side of the oilstone by a fastening screw to fix the oilstone. The swing of the swing arm drives the oilstone clamp to swing. A cylinder is fixedly arranged on the swing arm. The output end of the cylinder abuts against the top of the oilstone through a connecting rod, so that the oilstone remains in tight contact with the bearing while swinging.

[0003] However, during the process of processing bearing rings by the existing bearing superfinishing machine, as a consumable, the oilstone wears and consumes. When the cylinder drives the connecting rod to push the oilstone to abut tightly against the bearing ring, the oilstone needs to overcome the friction force between it and the pressing block and move relative to the pressing block and the oilstone clamp. After long-term use, the contact surfaces of the oilstone clamp, the pressing block and the oilstone wear and consume and it is difficult to maintain close contact. The possibility of relative displacement between the oilstone and the oilstone clamp and the pressing block increases during the high-frequency swing process, resulting in grinding scratches on the surfaces of some bearing rings, increasing the rework rate of the produced bearing rings that need to be reground, affecting the grinding quality, and even possibly causing the phenomenon that the oilstone is not firmly clamped and falls off, resulting in waste of consumables. Summary of the Invention

[0004] The present application provides a grinding device and a grinding process for bearing ring superfinishing, which have the advantage of avoiding the wear of the oilstone on the clamping block and the pressing block while ensuring that the clamping length of the oilstone is within the rated range, so as to solve the problem that the clamping stability decreases after long-term use due to the wear of the oilstone on the pressing block.

[0005] To achieve the above object, the present application adopts the following technical solution: A grinding device for bearing ring superfinishing includes a swing arm. One end of the swing arm is fixedly connected to a fixed seat. A clamping block is slidably connected inside the fixed seat. An oilstone is arranged inside the clamping block. A pressing block for fixing the oilstone is movably arranged on one side of the clamping block. An adjusting rod is arranged on the other side of the clamping block. A locking mechanism is arranged on one side of the clamping block. An adjusting mechanism is arranged on one side of the clamping block.

[0006] The locking mechanism can drive the pressing block to press against the oilstone and maintain a pressing state when the clamping block moves relative to the fixed seat. The adjusting mechanism can cooperate with the clamping block to drive the adjusting rod to move. After the clamping block moves out of the fixed seat and cooperates with the pressing block to clamp the oilstone, the adjusting mechanism can drive the adjusting rod to rotate so that the adjusting rod moves away from the end of the oilstone for grinding. When the clamping block resets, the adjusting mechanism can drive the adjusting rod to rotate and reset, and the adjusting rod can limit the length of the part of the oilstone extending out of the clamping block.

[0007] Further, the locking mechanism includes a pressing rod. The clamping block is threadedly sleeved with the pressing rod. The pressing block is rotationally clamped with the pressing rod. One end of the pressing rod is fixedly sleeved with a fastening gear. One side of the inner wall of the fixed seat is fixedly connected with a first toothed plate, and the first toothed plate and the fastening gear can mesh with each other.

[0008] Through the relative movement between the fastening gear and the first toothed plate, when the clamping block moves, it drives the pressing rod to rotate, thereby changing the pressing state of the pressing block on the oilstone.

[0009] Further, the adjusting mechanism includes a support shaft. The support shaft is rotatably connected with the clamping block. An adjusting rod is fixedly sleeved at a position near one end of the shaft body of the support shaft. One end of the support shaft is fixedly sleeved with an adjusting gear. One side of the inner wall of the fixed seat is fixedly connected with a second toothed plate, and the second toothed plate and the adjusting gear can mesh with each other.

[0010] Through the movement of the adjusting gear relative to the second toothed plate, after the clamping block completes the action of clamping the oilstone, the adjusting gear rotates to drive the adjusting rod to rotate coaxially, thereby driving the adjusting rod to move away after completing the adjustment action of adjusting the length of the oilstone extending out of the clamping block, facilitating the subsequent extension and grinding of the oilstone.

[0011] Further, the distance from the second toothed plate to the bottom of the fixed seat is shorter than the distance from the first toothed plate to the bottom of the fixed seat. One side of the clamping block is fixedly connected with a torsion spring. One end of the torsion spring is fixedly connected with the adjusting rod, and a stop block is fixedly arranged on one side of the clamping block.

[0012] After the adjusting gear disengages from the second toothed plate, the torsion spring cooperates with the stop block to drive the adjusting rod to rotate and reset, and the reset adjusting rod can limit the length of the oilstone extending out of the clamping block.

[0013] The beneficial effects of the present invention are as follows:

[0014] A grinding device for ultra-precision machining of bearing rings and its grinding process provided by this application. By using an adjusting rod to block one end of the oilstone, the length of the oilstone extending out of the clamping block is restricted, so that the clamping length of the oilstone can be adjusted when the pressing block removes the clamping and fixing of the oilstone. This facilitates ensuring that the length of the end of the oilstone used for grinding from the clamping point is within the rated range when the oilstone grinds the bearing ring later. When the clamping block moves, the clamping block cooperates with the fastening gear, the first toothed plate and the pressing rod to complete the clamping and fixing of the oilstone by the pressing block, ensuring a good posture of the oilstone during grinding. And during the locking process of the oilstone, the adjusting rod always ensures that the length of the oilstone extending out of the clamping block is fixed and moves away during the subsequent process of the oilstone extending out of the fixed seat. This achieves the effect of being able to adjust the length of the oilstone extending out of the clamping block while avoiding clamping wear of the pressing block and the clamping block by the oilstone, improving the service life of this grinding device and ensuring the stability of the grinding process of the oilstone on the bearing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings:

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the structure at the connecting rod of the present invention;

[0018] Figure 3 It is a schematic diagram of the structure at the first toothed plate of the present invention;

[0019] Figure 4 It is a schematic diagram of the structure at the second toothed plate of the present invention;

[0020] Figure 5 It is a schematic cross-sectional view of the structure at the clamping block of the present invention;

[0021] Figure 6 For the present invention Figure 5 The enlarged view of the structure at A in;

[0022] Figure 7 It is a schematic diagram of the structure at the limiting plate of the present invention;

[0023] Figure 8 For the present invention Figure 7 The enlarged schematic diagram of the structure at B in;

[0024] Figure 9 It is a schematic cross-sectional view of the structure at the pressing block of the present invention.

[0025] In the figure: 1 - fixed seat, 2 - clamping block, 3 - guide rod, 4 - abutting rod, 5 - fastening gear, 6 - first toothed plate, 7 - oilstone, 8 - connecting rod, 9 - adjusting rod, 901 - rotating rod, 902 - abutting rod, 10 - support shaft, 11 - adjusting gear, 12 - second toothed plate, 13 - stopper, 14 - limiting plate, 15 - limiting rod, 16 - pressing block, 17 - fixing rod, 18 - sliding rod, 19 - adjusting spring, 20 - adjusting screw, 21 - torsion spring, 22 - rotating plate, 23 - sliding plate, 24 - contact switch, 25 - friction plate, 26 - electromagnet, 27 - permanent magnet, 28 - reset spring, 29 - swing arm, 30 - cylinder, 31 - connecting plate. Specific embodiments

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] Embodiment 1, as Figures 1 - 6 , a grinding device for ultra-precision machining of bearing rings, includes a swing arm 29. The swing arm 29 is fixedly installed on the swing mechanism of the grinding device through a connecting arm. One end of the swing arm 29 is fixedly connected to a fixed seat 1. A clamping block 2 is slidably connected inside the fixed seat 1. Guide rods 3 are fixedly connected to both sides of the inner wall of the fixed seat 1. The guide rods 3 are slidably sleeved with the clamping block 2. An oilstone 7 is arranged inside the clamping block 2. The clamping block 2 is used to drive the oilstone 7 to move. A cylinder 30 is fixedly connected to one side of the swing arm 29. The output end of the cylinder 30 is fixedly connected to a connecting rod 8. One end of the connecting rod 8 is fixedly connected to the clamping block 2. When grinding the bearing ring, the swing arm 29 drives the clamping block 2 to swing, the clamping block 2 drives the oilstone 7 to swing, and at the same time the cylinder 30 drives the connecting rod 8 to move. The connecting rod 8 cooperates with the clamping block 2 to drive the oilstone 7 to abut against the bearing ring for grinding.

[0028] Refer to Figure 6, a pressing block 16 for fixing an oilstone 7 is movably arranged on one side of the clamping block 2. The side of the pressing block 16 close to the oilstone 7 is set as an elastic surface to ensure stable clamping. A tightening rod 4 is threadedly sleeved on one side of the clamping block 2. The tightening rod 4 is rotationally clamped with the pressing block 16. The tightening rod 4 can drive the pressing block 16 to move while rotating relative to the pressing block 16. A fastening gear 5 is fixedly sleeved at one end of the tightening rod 4 located outside the clamping block 2. One side of the inner wall of the fixed seat 1 is fixedly connected with a first toothed plate 6. The first toothed plate 6 can be meshed with the fastening gear 5. When grinding is required, the connecting rod 8 drives the clamping block 2 to move relative to the fixed seat 1, so that the oilstone 7 at the bottom of the clamping block 2 extends out of the fixed seat 1. The clamping block 2 drives the tightening rod 4 to move. The tightening rod 4 drives the fastening gear 5 to move relative to the first toothed plate 6. The first toothed plate 6 drives the fastening gear 5 to rotate. The fastening gear 5 drives the tightening rod 4 to rotate, so that the tightening rod 4 drives the pressing block 16 to move and approach the oilstone 7, so that the pressing block 16 abuts against the oilstone 7 and locks the pressing block 16 by using the threaded engagement state between the tightening rod 4 and the clamping block 2, thereby completing the relative fixation between the clamping block 2 and the oilstone 7.

[0029] A support shaft 10 is rotatably connected to one side of the clamping block 2. An adjusting rod 9 is fixedly sleeved at a position close to one end of the shaft body of the support shaft 10. The adjusting rod 9 is used to adjust the length of the oilstone 7 extending out of the clamping block 2 to ensure that the length of the oilstone 7 between the clamping block 2 and the bearing race is within the rated range. The adjusting rod 9 is L-shaped and the top of the horizontal part is set as an abutting arc surface. The radius of the abutting arc surface is adapted to the rotation radius of the adjusting rod 9 to ensure effective contact between the adjusting rod 9 and the grinding end of the oilstone 7. One end of the support shaft 10 is fixedly sleeved with an adjusting gear 11. Refer to Figure 4 , one side of the inner wall of the fixed seat 1 is fixedly connected with a second toothed plate 12. The second toothed plate 12 can be meshed with the adjusting gear 11. The height of the second toothed plate 12 is lower than that of the first toothed plate 6, that is, the second toothed plate 12 is closer to the bottom opening of the fixed seat 1 relative to the first toothed plate 6. When the clamping block 2 drives the oilstone 7 to extend out of the fixed seat 1, the fixing action of the oilstone 7 is first performed, and the adjusting rod 9 moves away from the bottom of the oilstone 7 relatively later. One side of the clamping block 2 is fixedly connected with a torsion spring 21. One end of the torsion spring 21 is fixedly connected with the adjusting rod 9. A stop block 13 is fixedly arranged on one side of the clamping block 2.

[0030] When grinding is required, the clamping block 2 moves. At this time, one end of the adjusting rod 9 is located at the bottom of the clamping block 2, and the end of the oilstone 7 for grinding rests on the adjusting rod 9 under the action of gravity. The clamping block 2 cooperates with the support shaft 10 to drive the adjusting rod 9 to move. While keeping the adjusting rod 9 and the clamping block 2 moving synchronously, that is, while the length of the oilstone 7 between the adjusting rod 9 and the clamping block 2 remains unchanged, the fastening gear 5 cooperates with the first toothed plate 6 and the pressing rod 4 to drive the pressing block 16 close to the oilstone 7. The fastening gear 5 disengages from the engagement with the first toothed plate 6 to complete the relative locking of the oilstone 7 and the clamping block 2. Then the adjusting gear 11 moves to engage with the second toothed plate 12, and the clamping block 2 continues to move. The second toothed plate 12 drives the adjusting gear 11 to rotate.

[0031] The adjusting gear 11 drives the support shaft 10 to rotate, and the support shaft 10 drives the adjusting rod 9 to rotate. Without causing additional wear to the oilstone 7, the adjusting rod 9 is moved away from the bottom of the oilstone 7 to facilitate the subsequent contact between the oilstone 7 and the bearing race until the oilstone 7 extends out of the fixed seat 1. The adjusting gear 11 remains in the meshing state with the second toothed plate 12. After grinding is completed, the distance that the oilstone 7 extends out of the clamping block 2 decreases due to grinding wear. The clamping block 2 rises and resets. The adjusting gear 11 disengages from the engagement with the second toothed plate 12. The torsion spring 21 drives the adjusting rod 9 to rotate. The rod body of the adjusting rod 9 abuts against the stop block 13 and cooperates with the torsion spring 21 to rotate the adjusting rod 9 back to its original position. The clamping block 2 drives the oilstone 7 to continue moving upward until the fastening gear 5 re-engages with the first toothed plate 6. The first toothed plate 6 drives the fastening gear 5 to rotate, and then drives the pressing block 16 to reset, removing the fixation on the oilstone 7.

[0032] The oilstone 7 moves under the action of gravity, and the end for grinding rests on the adjusting rod 9 again, so as to ensure that the oilstone 7 extends out of the rated length relative to the clamping block 2 without additional frictional force on both the pressing block 16 and the clamping block 2. That is, while avoiding additional wear of the oilstone 7 on the pressing block 16 and the clamping block 2, it ensures that the length from the end of the oilstone 7 for grinding to the clamping part is within the rated range, avoiding excessive distance from the clamping part to the contact between the oilstone 7 and the bearing race and preventing shaking or deformation during the pressing and swinging process, ensuring the grinding accuracy of the bearing race, and improving the service life of the grinding device.

[0033] Embodiment 2, as Figures 4 - 9, on the basis of the first embodiment, the adjusting rod 9 includes a movable rod 901 and an abutting rod 902. The abutting rod 902 is used to contact the oilstone 7 and limit the length of the oilstone 7 extending out of the clamping block 2. The movable rod 901 is fixedly sleeved with the support shaft 10. Two limiting rods 15 are fixedly arranged on one side of the abutting rod 902. The number of the limiting rods 15 is two, and the two limiting rods 15 are symmetrically arranged about the center line of the abutting rod 902. The limiting rods 15 are in a T shape and are slidably connected with the movable rod 901. The limiting rods 15 can slide relative to the movable rod 901 without detaching from the movable rod 901. A regulating screw 20 is threadedly sleeved at the middle position of the bottom surface of the movable rod 901. The regulating screw 20 is used to adjust the distance between the movable rod 901 and the abutting rod 902. The regulating screw 20 is movably sleeved with the abutting rod 902. The top surface of the movable rod 901 is set as an abutting arc surface. When using oilstones 7 made of different materials, rotate the regulating screw 20 to change the moving distance of the abutting rod 902 relative to the movable rod 901, so as to adjust the distance between the movable rod 901 and the clamping block 2, ensure that the clamping length of oilstones 7 made of different materials is within the rated range, and improve the flexibility of the use of the grinding device.

[0034] One side of the clamping block 2 is fixedly connected with a connecting plate 31. The connecting plate 31 is in an inverted L shape. One side of the connecting plate 31 is fixedly connected with a rotating plate 22 through bolts. One side of the rotating plate 22 is fixedly connected with a fixing rod 17. A sliding rod 18 is slidably sleeved inside the fixing rod 17. The sliding rod 18 is in a T shape and can slide relative to the fixing rod 17 without detaching from the fixing rod 17. A regulating spring 19 is movably sleeved inside the fixing rod 17. The regulating spring 19 pushes the sliding rod 18 to extend out of the fixing rod 17. The position of the sliding rod 18 corresponds to the position of the oilstone 7. After the clamping block 2 removes the locking of the oilstone 7, the sliding rod 18 pushes the oilstone 7 to contact the adjusting rod 9, ensuring the stability of the process of adjusting the clamping length of the oilstone 7. When installing the oilstone 7, loosen the bolts fixing the rotating plate 22, rotate the rotating plate 22 to move the sliding rod 18 away from the top of the clamping block, insert the oilstone 7 into the inside of the clamping block 2 when the clamping block 2 is in the state of moving to the top, and the bottom of the oilstone 7 is placed on the adjusting rod 9. There is no need for manual additional adjustment of the clamping length and clamping fixation of the oilstone 7, improving the convenience and accuracy of the installation of the oilstone 7. After the installation of the oilstone 7 is completed, rotate the rotating plate 22 to reset.

[0035] Embodiment Three, as Figures 4 - 8, a friction plate 25 is slidably sleeved on one side of the connecting plate 31, an electromagnet 26 is fixedly connected to one side of the connecting plate 31, a permanent magnet 27 is fixedly arranged inside the friction plate 25, the position of the permanent magnet 27 corresponds to the position of the electromagnet 26 and the acting force between them is a repulsive force, a contact switch 24 is fixedly arranged on one side of one of the two guide rods 3, the contact switch 24 is electrically connected to the electromagnet 26, a sliding plate 23 is fixedly connected to one side of the sliding rod 18, the sliding plate 23 is slidably sleeved on the fixed rod 17, a limiting plate 14 is fixedly connected to one side of the sliding plate 23, and reset springs 28 are fixedly connected to both the top and the bottom of one side of the friction plate 25.

[0036] When grinding is required, after the clamping block 2 clamps the oilstone 7, the clamping block 2 continues to move to contact the contact switch 24. The contact switch 24 controls the electromagnet 26 to start. The electromagnet 26 cooperates with the permanent magnet 27 to drive the friction plate 25 to fit with the limiting plate 14. The friction plate 25 restricts the movement of the sliding rod 18 relative to the clamping block 2 through the friction force between it and the limiting plate 14, so that the position of the sliding rod 18 is fixed relative to the position of the oilstone 7, providing an axial support force during the subsequent grinding process, thereby dispersing the force required for the abutting rod 4 to clamp the oilstone 7 to complete grinding, avoiding the concentration of clamping stress, and further improving the reliability of the use of this grinding device.

[0037] A grinding process for the ultra-precision machining of bearing rings includes the following steps:

[0038] S1: Rotate the rotating plate 22 to move it away from the top of the clamping block 2, insert the oilstone 7 into the inside of the clamping block 2, and rotate the rotating plate 22 back to its original position;

[0039] S2: The air cylinder 30 cooperates with the connecting rod 8 to drive the clamping block 2 to move. The adjusting rod 9 moves synchronously with the clamping block 2. The fastening gear 5 cooperates with the first toothed plate 6 and the abutting rod 4 to drive the pressing block 16 to move and press against the oilstone 7 to complete the clamping and fixing of the oilstone 7;

[0040] S3: The clamping block 2 continues to move until it contacts the contact switch 24. The electromagnet 26 cooperates with the permanent magnet 27 to drive the friction plate 25 to press against the limiting plate 14, restricting the movement of the sliding rod 18 relative to the clamping block 2 and providing support for one end of the oilstone 7;

[0041] S4: The clamping block 2 drives the support shaft 10 to move, and cooperates with the adjusting gear 11 and the second toothed plate 12 to drive the adjusting rod 9 to rotate, so that the adjusting rod 9 moves away from the end of the oilstone 7 for grinding;

[0042] S5: The clamping block 2 drives the oilstone 7 to extend out of the fixed seat 1 to abut against the bearing ring. The swing arm 29 drives the oilstone 7 to swing. The air cylinder 30 provides pressure compensation for the oilstone 7 during the grinding process to complete a single grinding;

[0043] S6: The cylinder 30 drives the clamping block 2 to move back to its original position. When the pressure block 16 releases the fixation of the oilstone 7, the sliding rod 18 drives the oilstone 7 to move, causing one end of the oilstone 7 to extend out of the clamping block 2 and abut against the adjusted rod 9 after resetting, thereby completing the length compensation for the worn part of the oilstone 7.

[0044] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A grinding device for superfinishing of bearing rings, characterized in that, It comprises a swing arm (29), one end of the swing arm (29) is fixedly connected to a fixing seat (1), the inner side of the fixing seat (1) is slidably connected to a clamping block (2), an oil stone (7) is arranged on the inner side of the clamping block (2), a pressure block (16) for fixing the oil stone (7) is movably arranged on one side of the clamping block (2), an adjusting rod (9) is arranged on the other side of the clamping block (2), a locking mechanism is arranged on one side of the clamping block (2), and an adjusting mechanism is arranged on one side of the clamping block (2); The locking mechanism can drive the pressure block (16) to press against the oil stone (7) and maintain the pressed state when the clamping block (2) moves relative to the fixed seat (1); the adjusting mechanism can cooperate with the clamping block (2) to drive the adjusting rod (9) to move; after the clamping block (2) moves outward from the fixed seat (1) and cooperates with the pressure block (16) to clamp the oil stone (7), the adjusting mechanism can drive the adjusting rod (9) to rotate so that the adjusting rod (9) is moved away from the end of the oil stone (7) used for grinding; when the clamping block (2) is reset, the adjusting mechanism can drive the adjusting rod (9) to rotate and reset; the adjusting rod (9) can limit the length of the oil stone (7) extending out of the clamping block (2); The locking mechanism comprises a clamping rod (4), the clamping block (2) and the clamping rod (4) are threadedly sleeved, the pressing block (16) and the clamping rod (4) are rotatably clamped, one end of the clamping rod (4) is fixedly sleeved with a fastening gear (5), one side of the inner wall of the fixing seat (1) is fixedly connected with a first gear plate (6), and the first gear plate (6) and the fastening gear (5) can mesh with each other; The adjustment mechanism comprises a support shaft (10), the support shaft (10) is rotatably connected to the clamping block (2), one end of the support shaft (10) is fixedly sleeved with an adjustment rod (9), one end of the support shaft (10) is fixedly sleeved with an adjustment gear (11), one side of the inner wall of the fixed seat (1) is fixedly connected with a second tooth plate (12), and the second tooth plate (12) and the adjustment gear (11) are capable of meshing with each other; The distance between the second tooth plate (12) and the bottom of the fixed seat (1) is shorter than the distance between the first tooth plate (6) and the bottom of the fixed seat (1); a torsion spring (21) is fixedly connected to one side of the clamping block (2); one end of the torsion spring (21) is fixedly connected to the adjusting rod (9); and a stopper (13) is fixedly provided on one side of the clamping block (2).

2. The lapping device for ultra-precision machining of bearing rings according to claim 1, wherein, The adjusting rod (9) comprises a movable rod (901) and an abutting rod (902); the movable rod (901) is fixedly sleeved with the support shaft (10); two limiting rods (15) are fixedly provided on one side of the abutting rod (902); the limiting rods (15) are T-shaped and slidably connected to the movable rod (901); an adjusting screw (20) is threadedly sleeved at a middle position of the bottom surface of the movable rod (901); the adjusting screw (20) is movably sleeved with the abutting rod (902).

3. A grinding device for ultra-precision machining of bearing rings according to claim 1, characterized in that, One side of the clamping block (2) is fixedly connected with a connecting plate (31). The connecting plate (31) is in an inverted L shape. One side of the connecting plate (31) is fixedly connected with a rotating plate (22) by bolts. One side of the rotating plate (22) is fixedly connected with a fixed rod (17). A sliding rod (18) is slidably sleeved inside the fixed rod (17). An adjusting spring (19) is movably sleeved inside the fixed rod (17).

4. A grinding device for ultra-precision machining of bearing rings according to claim 3, characterized in that, A friction plate (25) is slidably sleeved on one side of the connecting plate (31). An electromagnet (26) is fixedly connected to one side of the connecting plate (31). A permanent magnet (27) is fixedly arranged inside the friction plate (25). The position of the permanent magnet (27) corresponds to the position of the electromagnet (26), and the acting force between them is a repulsive force. One side of the sliding rod (18) is fixedly connected with a sliding plate (23). One side of the sliding plate (23) is fixedly connected with a limiting plate (14).

5. A grinding device for ultra-precision machining of bearing rings according to claim 4, characterized in that, Guide rods (3) are fixedly connected to both sides of the inner wall of the fixed seat (1). A contact switch (24) is fixedly arranged on one side of one of the two guide rods (3). The contact switch (24) is electrically connected to the electromagnet (26). Return springs (28) are fixedly connected to both the top and bottom of one side of the friction plate (25).

6. The lapping device for ultra-precision machining of bearing rings according to claim 5, characterized in that, One side of the swing arm (29) is fixedly connected with a cylinder (30). The output end of the cylinder (30) is fixedly connected with a connecting rod (8). One end of the connecting rod (8) is fixedly connected with the clamping block (2).

7. A grinding process for superfinishing of bearing rings, characterized in that, When using the grinding device for ultra-precision machining of bearing rings as described in claim 6 to grind the bearing rings, the following steps are included: S1: Rotate the rotating plate (22) to move it away from the top of the clamping block (2), insert the oilstone (7) into the inside of the clamping block (2), and rotate the rotating plate (22) back to its original position. S2: The cylinder (30) cooperates with the connecting rod (8) to drive the clamping block (2) to move. The adjusting rod (9) moves synchronously with the clamping block (2). The fastening gear (5) cooperates with the first toothed plate (6) and the pressing rod (4) to drive the pressing block (16) to move and press against the oilstone (7) to complete the clamping and fixing of the oilstone (7). S3: The clamping block (2) continues to move until it contacts the contact switch (24). The electromagnet (26) cooperates with the permanent magnet (27) to drive the friction plate (25) to press against the limiting plate (14), restricting the movement of the sliding rod (18) relative to the clamping block (2) and providing support for one end of the oilstone (7). S4: The clamping block (2) drives the support shaft (10) to move, and cooperates with the adjusting gear (11) and the second toothed plate (12) to drive the adjusting rod (9) to rotate, so that the adjusting rod (9) moves away from the end of the oilstone (7) for grinding. S5: The clamping block (2) drives the oilstone (7) to extend out of the fixed seat (1) and press against the bearing ring. The swing arm (29) drives the oilstone (7) to swing. The cylinder (30) provides pressure compensation for the oilstone (7) during the grinding process to complete a single grinding. S6: The cylinder (30) drives the clamping block (2) to move back to its original position. When the pressure block (16) releases the fixation of the oilstone (7), the sliding rod (18) drives the oilstone (7) to move, so that one end of the oilstone (7) extends out of the clamping block (2) and abuts against the adjusted rod (9) after resetting, completing the length compensation of the worn part of the oilstone (7).

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