Grinding tool suitable for super-huge thin-wall bearing ring

Abstract

The invention relates to the technical field of grinding devices, in particular to a grinding tool suitable for a super-huge thin-wall bearing ring. According to the grinding tool, when the outer ring of the thin-wall bearing ring needs to be ground, only the thin-wall bearing ring needs to be forcibly mounted on the clamping jaws from top to bottom, so that the inner circumferential surface of the thin-wall bearing ring is supported on the outer side surfaces of the restraining blocks of the clamping jaws, and when the inner ring of the thin-wall bearing ring needs to be ground, the inner ring of the thin-wall bearing ring needs to be ground. When the thin-wall bearing ring is machined, only the thin-wall bearing ring needs to be forcibly installed on the clamping jaws from top to bottom, the peripheral face of the thin-wall bearing ring is hooped on the inner side faces of the restraining blocks of the clamping jaws, and due to the fact that the restraining blocks are located on the rigid elastic arms, the restraining blocks can keep tightly supporting the corresponding peripheral faces of the machined bearing ring depending on the rigidity and elasticity of the rigid elastic arms; reliable positioning supporting is provided, the positioning precision is guaranteed, meanwhile, the restraining blocks can resist radial force borne by the bearing ring during grinding machining, and then the machining precision is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of grinding devices, in particular to a grinding tool suitable for extra-large thin-walled bearing rings. Background Art

[0002] At present, with the rapid development of medical and industrial CT machines, higher requirements are put forward for CT machine bearings. The bearing rings in CT machine bearings refer to the annular parts of the radial rolling bearings with one or more raceways. Its high precision, large size, ultra-thinness and other characteristics also pose new challenges to the bearing manufacturing process technology.

[0003] The Chinese invention patent application with application publication number CN117283244A and application publication date 2023 / 12 / 26 discloses a processing method for thin-walled bearing rings, and the specific steps of the processing method are as follows: S1. Forging a blank to obtain a forged part; S2. Turning the forged part to obtain a turned workpiece; S3. Heat treating the turned workpiece to obtain a hot workpiece; S4. Grinding the hot workpiece to obtain a molded part; S5. Wire cutting the molded part, and turning and grinding the cut surface after each cutting to obtain a plurality of bearing rings.

[0004] In the above-mentioned processing method of thin-walled bearing rings, a multi-piece joint forging process is used during forging, and after the grinding process is completed, the pieces are separated by cutting and grinding one by one, thereby obtaining a plurality of thin-walled bearing rings. After the joint forging and separation, each thin-walled bearing ring needs to be ground individually to the required size. Since the thin-walled bearing ring has a thin wall thickness, a large diameter and a low height (the thin-walled bearing ring generally has a diameter greater than 1m, a wall thickness of 6mm and a height of 9mm), the thin-walled bearing ring is easily deformed when it is ground individually using a CNC vertical grinder.

[0005] A Chinese utility model patent with authorization announcement number CN212598962U discloses a support device for drilling holes in bearing rings, which has multiple movable claws installed on a disk body. Each movable claw is adjustably installed on the disk body in the radial direction of the disk body. A mounting plate is provided above the movable claws, and an arc-shaped support ring is provided on the mounting plate. The inner and outer arc surfaces of the support ring are respectively provided with ring grooves, and the ring grooves are respectively provided with anti-slip rubber strips. The anti-slip rubber strips can use their own deformation force to always stick to the inner wall or outer wall of the bearing ring, so as to adapt to bearing rings of different sizes and diameters, and then support and limit the bearing ring in the radial direction. Although this bearing ring processing device can radially support bearing rings with larger diameters and thinner thicknesses so as to process the inner and outer circumferences of the rings, for high-precision, large-size, and ultra-thin bearing rings such as those used in CT machines, since the anti-slip rubber strip with deformation ability is in contact with the bearing ring, the bearing ring is subjected to a large radial force during grinding. The deformation of the anti-slip rubber strip will affect the accuracy of the radial positioning support of the ring to a certain extent, thereby affecting the processing accuracy of the ring. Therefore, although the above-mentioned support device can reduce the deformation of the bearing ring during the processing, it still cannot guarantee the processing accuracy well. Summary of the invention

[0006] The purpose of the present invention is to provide a grinding tool suitable for extra-large thin-walled bearing rings, so as to solve the technical problem in the prior art that the positioning accuracy cannot be accurately guaranteed during the grinding of a single thin-walled bearing ring.

[0007] To achieve the above object, the present invention provides a technical solution for a grinding tool suitable for an extra-large thin-walled bearing ring: A grinding tool suitable for extra-large thin-walled bearing rings comprises a base, an upper end surface of which is evenly distributed with a plurality of claws along the circumferential direction, the claws comprising a mounting plate for fixed connection with the base, a radial side of the mounting plate having an overhang section, a plurality of spacing grooves are opened on the overhang section in the circumferential direction to form a plurality of rigid elastic arms, each rigid elastic arm is provided with a constraint block on the same circumference, the constraint block of each claw is used to support the processed bearing ring from the inside to the outside or to hold the processed bearing ring from the outside to the inside, the radial inner side surface and the radial outer side surface of the constraint block are provided with clamping inclined surfaces for facilitating the installation of the processed bearing ring, the inner side surface curvature of each constraint block is consistent with the outer circle curvature of a standard thin-walled bearing ring, and the outer side surface curvature is consistent with the inner circle curvature of a standard thin-walled bearing ring.

[0008] Furthermore, the entire clamping claw is located directly above the base, and a step surface is provided on the bottom surface of the mounting plate of the clamping claw so that a portion of the plate section is separated from the upper surface of the base and forms the overhanging section.

[0009] Furthermore, the mounting plate includes a fixed plate section for fixed connection with the base and a clamping plate section on a radial side of the fixed plate section. The clamping plate section extends in an arc shape and has a circumferential length greater than the fixed plate section. The overhang section is on the clamping plate section.

[0010] Furthermore, the mounting plate segment is located radially outside the fixed plate segment, the rigid elastic arm has portions located radially on both sides of the constraint block, and the length of the portion located radially inside is greater than the length of the portion located radially outside.

[0011] Furthermore, the restraint block and the mounting plate are an integrally formed structure.

[0012] Furthermore, the clamping claw and the base are adjustably mounted along the radial direction of the base, and positioning structures for positioning the clamping claw at different radial positions are respectively provided on the mounting plate and the base.

[0013] Furthermore, the base is provided with groups of fastening bolt holes along its radial direction at positions corresponding to each of the claws, and the fixed plate section is provided with long slot-shaped bolt holes at the positions corresponding to the groups of fastening bolt holes, so that the claws can be adjusted along the radial direction of the base to adapt to the constraints on the inner and outer rings of the thin-walled bearing ring.

[0014] Furthermore, the positioning structure is a positioning pin hole arranged on the base and the mounting plate, and a matching positioning pin.

[0015] Furthermore, the circumferential interval between two adjacent claws is smaller than the circumferential length of a single claw.

[0016] Furthermore, a plurality of lifting holes are evenly distributed on the base.

[0017] Beneficial effect: The present invention provides a new grinding tool suitable for large thin-walled bearing rings, the mounting plate of the clamping jaws is provided with an overhanging section, a plurality of spacing grooves are provided on the overhanging section in the circumferential direction to form a plurality of rigid elastic arms, each rigid elastic arm is provided with a constraint block on the same circumference, and the radial inner and outer sides of the constraint block are provided with a clamping inclined surface for the edge bearing ring to be installed, when it is necessary to grind the outer ring of the thin-walled bearing ring, it is only necessary to force the thin-walled bearing ring to each clamping jaw from top to bottom so that its inner circumferential surface is supported on each clamping jaw. On the outer surface of the constraint block, when it is necessary to grind the inner ring of the thin-walled bearing ring, it is only necessary to force the thin-walled bearing ring onto each claw from top to bottom so that its outer circumference is clamped on the inner side surface of the constraint block of each claw. Since the constraint block is on the rigid spring arm, it relies on the stiffness and elasticity of the rigid spring arm. The constraint block can keep the corresponding circumference of the processed bearing ring tight, provide more reliable positioning support, and ensure positioning accuracy. At the same time, the constraint block can resist the radial force exerted on the bearing ring during grinding, thereby ensuring processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment of a grinding tool suitable for an extra-large thin-walled bearing ring of the present invention; Figure 2 for Figure 1 Schematic diagram of the local structure of A; Figure 3 for Figure 1 Schematic diagram of the structure of the middle base; Figure 4 for Figure 1 Schematic diagram of the structure of a single claw.

[0019] In the figure: 1. Base; 2. Clamping claw; 3. Thin-walled bearing ring; 4. Fastening bolt; 5. Constraint block; 6. Fastening bolt hole; 7. Lifting hole; 8. Long slot bolt hole; 9. Clamping claw alignment surface; 10. Clamping inclined surface; 11. Step surface; 12. Spacer groove; 13. Outer circle locating pin hole; 14. Inner circle locating pin hole; 15. Locating pin; 16. Mounting plate; 17. Marking scale line; 18. Rigid elastic arm. DETAILED DESCRIPTION

[0020] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0021] The grinding tool of the present invention is mainly designed for thin-walled bearing rings with thin wall thickness, large diameter and low height. The main concept is: design a ring-disk type base, the bottom of the base can be magnetically attracted on a CNC vertical grinding machine, and a plurality of claws are designed on the top outer end surface of the base. The mounting plate of the claw has an overhang section, and the overhang section is provided with a plurality of spacing grooves in the circumferential direction to form a plurality of rigid elastic arms. Each rigid elastic arm is provided with a constraint block on the same circumference, and the radial inner and outer sides of the constraint block are provided with a clamping inclined surface for the edge bearing ring to be installed. When When it is necessary to grind the thin-walled bearing ring, it is only necessary to force the thin-walled bearing ring onto each claw from top to bottom, so that its inner circumference is supported on the outer side of the constraint block of each claw, or its outer circumference is clamped on the inner side of the constraint block of each claw. Since the constraint block is on the rigid spring arm, it relies on the stiffness and elasticity of the rigid spring arm. The constraint block can keep the corresponding circumference of the processed bearing ring tight, provide more reliable positioning support, and ensure positioning accuracy. At the same time, the constraint block can resist the radial force exerted on the bearing ring during grinding, thereby ensuring processing accuracy.

[0022] Based on the above main ideas, the basic technical solution of the present invention is: a grinding tool suitable for extra-large thin-walled bearing rings, such as Figure 1 and Figure 2As shown, it includes a base 1, which is a ring-disk structure, and a plurality of claws 2 are evenly distributed along the circumferential direction on the upper end surface thereof. The claws 2 include a mounting plate 16 for fixed connection with the base 1, and the mounting plate 16 has an overhanging section on one radial side, and a plurality of spacing grooves 12 are opened on the overhanging section in the circumferential direction to form a plurality of rigid elastic arms 18. The restraint blocks 5 of the claws 2 are respectively arranged on the rigid elastic arms 18, and the restraint blocks 5 of each claw 2 are used to support the processed bearing ring from the inside to the outside or to hold the processed bearing ring from the outside to the inside. The radial inner side surface and the radial outer side surface of the restraint block 5 are provided with clamping inclined surfaces 10 for the edge of the processed bearing ring to be installed. As shown Figure 4 As shown, this structure enables the thin-walled bearing ring 3 to be slowly hammered into the restraining block 5 of the clamping claw 2 along the clamping inclined surface 10 by a rubber hammer, so that the inner ring or the outer ring can be clamped smoothly. After clamping, the restraining block 5 exerts a restraining force on the thin-walled bearing ring, thereby facilitating grinding.

[0023] The design of the rigid elastic arm 18 and the spacing groove 12 makes the grinding tool of the present invention have a certain elastic force, which is convenient to operate when clamping the thin-walled bearing ring. After the clamping is completed, it has a certain holding force on the thin-walled bearing ring, which is convenient for grinding operation and ensures grinding accuracy. The inner surface curvature of each of the constraint blocks 5 is consistent with the outer circle curvature of the standard thin-walled bearing ring, and the outer surface curvature is consistent with the inner circle curvature of the standard thin-walled bearing ring. By designing the inner surface curvature and the outer surface curvature of each constraint block 5 to be consistent with the curvature of the standard thin-walled bearing ring, it is ensured that the thin-walled bearing ring can be clamped on the grinding tool of the present invention.

[0024] On the basis of the above embodiments, in one embodiment, the claw 2 is partially arranged above the base 1, and the other part is cantilevered outside the base 1. Specifically, a radial part of the plate section of the mounting plate 16 of the claw 2 is cantilevered outside the ring disk of the base 1 to form the cantilevered section. The cantilevering in this way can also make the grinding tool of the present invention have a certain elastic force, which is convenient for clamping operation and has a certain holding force. The present invention provides a better embodiment, such as Figure 1 and Figure 2 As shown, the jaw 2 is arranged as a whole just above the base 1, and a step surface 11 is provided on the bottom surface of the mounting plate 16 of the jaw 2 so that a part of the plate section is separated from the upper surface of the base 1 and forms the overhanging section. By designing the jaw 2 as a whole just above the base 1, the grinding tooling of the present invention is more stable and reliable when in use, and is more convenient to operate.

[0025] Based on the above embodiments, the present invention provides a better embodiment, such as Figure 1 , Figure 2 and Figure 4As shown, the mounting plate 16 includes a fixed plate section for fixedly connecting with the base 1 and a clamping plate section on the radial side of the fixed plate section, the fixed plate section is used to fix the claw 2 on the base 1, the clamping plate section is used to form an overhang section and a constraint block 5 is arranged on the clamping plate section; the clamping plate section extends in an arc shape and its length in the circumferential direction is greater than that of the fixed plate section, forming a convex structure, and the use of such a convex structure is conducive to forming a longer overhang section on the mounting plate, so that more constraint blocks 5 can be arranged on the clamping plate, which is conducive to forming a larger wrapping surface between more constraint blocks 5 and the processed thin-walled bearing ring 3 during grinding, so as to prevent a single thin-walled bearing ring from being easily deformed during grinding.

[0026] On the basis of the above embodiments, in one embodiment, the mounting plate segment is located radially inside the fixed plate segment, the fixed plate segment is located outside and radially adjustable between the base 1, the rigid elastic arm 18 includes parts located radially on both sides of the constraint block 5, and the length of the radially outer part is greater than the length of the radially inner part, and the corresponding function can also be achieved through this structure. The present invention provides a more preferred embodiment, such as Figure 1 , Figure 2 and Figure 4 As shown, the mounting plate section is located radially outside the fixed plate section, and the rigid elastic arm 18 has parts located on both radial sides of the constraint block 5, and the length of the part located radially inside is greater than the length of the part located radially outside. In the above two embodiments, it is respectively explained that the mounting plate section is located radially inside and radially outside the fixed plate section. In this structure, as long as there is a fixed plate section designed for fixing the claw 2 and the base 1 and a mounting plate section for mounting the bearing ring to be processed, the mounting plate section can be designed on the inside or outside of the fixed plate section to achieve its corresponding function; at the same time, in these two embodiments, the rigid elastic arm 18 has parts located on both radial sides of the constraint block 5, and the length of the part close to the fixed plate section should be greater than the length of the part away from the fixed plate section, so as to prevent the fixed structure on the fixed plate section from interfering with the grinding part during grinding.

[0027] On the basis of the above embodiment, in one embodiment, the restraining block 5 and the mounting plate 16 are fixed by welding. The present invention provides a better embodiment, such as Figure 4 As shown, the restraint block 5 and the mounting plate 16 are an integrally formed structure. The restraint block 5 and the mounting plate 16 are processed by an integrally formed process so that the overall structural strength of the clamping claw 2 is stronger, and the grinding process is safer and more reliable.

[0028] On the basis of the above embodiments, in one embodiment, each claw can be fixedly connected to the base by bolts at a specific radial position. In another embodiment, a plurality of the claws 2 are adjustable along the radial direction of the base 1, and the adjustable radial direction between the claws 2 and the base 1 is convenient for grinding the inner and outer rings of the same thin-walled bearing ring, and at the same time, it is convenient for the grinding tool of the present invention to adapt to the grinding of thin-walled bearing rings of different sizes; of course, in order to facilitate the determination of the fixed position of the claws during the adjustable installation, the mounting plate 16 and the base 1 are also respectively provided with positioning structures for positioning the claws 2 at different radial positions, and the positioning structure can be designed to achieve rapid clamping operation.

[0029] The present invention provides a better embodiment, such as Figure 3 and Figure 4 As shown, a group of fastening bolt holes 6 are provided along the radial direction at the corresponding positions of each of the claws 2 on the base 1, so that the clamping of thin-walled bearing rings of different sizes can be achieved by fixing the claws 2 with different fastening bolt holes 6. Long slot bolt holes 8 are opened at the corresponding group of fastening bolt holes 6 on the fixed plate section, so that the claws 2 can be adjusted along the radial direction of the base 1 to adapt to the constraints on the inner and outer rings of the thin-walled bearing rings 3. In this embodiment, a number of groups of fastening bolt holes 6 corresponding to the number of the claws 2 are designed on the base 1, and long slot bolt holes 8 are correspondingly designed on the fixed plate section of the claws 2. At the same time, a group of fastening bolt holes 6 is designed to be four. By designing multiple fastening bolt holes 6, it is convenient to adjust the position between the claws and the base to be suitable for grinding thin-walled bearing rings of different sizes. In other embodiments, the base 1 and the mounting plate 16 of the claw 2 can be set with long slot bolt holes 8, or the base 1 and the mounting plate 16 of the claw 2 can be set with a group of fastening bolt holes 6, or the base 1 is set with long slot bolt holes 8 and the mounting plate 16 of the claw 2 is set with a group of fastening bolt holes 6.

[0030] The present invention provides a more preferred embodiment, wherein the positioning structure is a positioning pin hole and a matching positioning pin set on the base 1 and the mounting plate 16. In this embodiment, the positioning pin hole is a through hole drilled at a corresponding position on the base 1 and the fixed plate section of the mounting plate 16 during the first clamping and positioning during manufacturing, and the through hole forms a positioning pin hole, and the base 1 and the claw 2 are positioned by the positioning pin. Figure 2-Figure 4As shown, in the present application, the positioning pin holes are outer circle positioning pin holes 13 and inner circle positioning pin holes 14 respectively designed on the fixed plate sections of the base 1 and the claw 2, and positioning pins 15 matched with the outer circle positioning pin holes 13 and the inner circle positioning pin holes 14. When the outer circle of the thin-walled bearing ring needs to be ground, positioning is performed through the base 1 and the mounting plate 16. When the inner circle of the thin-walled bearing ring needs to be ground, positioning is performed through the base 1 and the mounting plate 16. Several inner circle positioning pin holes 14 are used. In other embodiments, the radial positioning structure of the claw 2 and the base 1 can also be designed by designing scale lines on the mounting plate of the claw 2 or by designing alignment markers on the mounting plate of the claw 2.

[0031] The present invention provides a more preferred embodiment, wherein the base 1 is evenly distributed with a plurality of lifting holes 7. Figure 1 and Figure 3 As shown, in the present application, three lifting holes 7 are designed and evenly distributed on the base 1, so that the base 1 can be moved to the CNC vertical grinder through the lifting holes 7 before the grinding process, and the base 1 can be magnetically fixed.

[0032] The present invention is a grinding tool suitable for manufacturing an extra-large thin-walled bearing ring. First, the base 1 is moved through the hanging hole 7 and placed on the disk of a CNC vertical grinder, and the base 1 is preliminarily aligned. After the alignment, it is magnetically attracted to the disk of the grinder; then the claws 2 and the base 1 are radially aligned. There are several ways of radial alignment: way 1, engraving a marking scale line 17 on the base 1, and aligning the claw alignment surface 9 of the claw 2 with the marking scale line 17 on the base 1, so as to achieve one-to-one alignment of the claw 2 and the base 1; way 2, engraving a marking scale line 17 on the base 1, and at the same time, providing a scale line along the axial direction of the base 1 on the side surface of the fixed plate section of the mounting plate 16, and engraving The degree lines and the marked scale lines are aligned, so that the claw 2 is aligned with the base 1 in the radial direction; method three, alignment blocks are designed on both sides of the mounting plate 16, and the alignment blocks are used to align with the marked scale lines, etc. The alignment methods of the claw 2 and the base 1 are not limited to the above methods. As long as the alignment is performed using appropriate reference objects, they all fall within the scope of protection of the present invention and will not be described one by one here; after the claw 2 and the base 1 are aligned one by one, the claw 2 is fixed to the base 1 by the fastening bolts 4; finally, the entire base 1 and the claw 2 are realigned, and after the alignment, the outer circle of the claw 2 is finely ground to the incoming size of the thin-walled bearing ring 3, and then the positioning structure is formed on the base 1 and the claw 2.

[0033] During use, when it is necessary to grind the outer ring of the thin-walled bearing ring, by adjusting the relative position between the jaw 2 and the base 1, the outer circle curvature of the constraint block 5 on the jaw 2 is adjusted to be consistent with the inner circle curvature of the thin-walled bearing ring, so that the thin-walled bearing ring can be mounted on the jaw 2, so as to facilitate the grinding of the outer ring of the thin-walled bearing ring; on the contrary, when it is necessary to grind the inner ring of the thin-walled bearing ring, by adjusting the relative position between the jaw 2 and the base 1, the inner circle curvature of the constraint block 5 on the jaw 2 is adjusted to be consistent with the outer circle curvature of the thin-walled bearing ring, so that the thin-walled bearing ring can be clamped between the inner walls of the jaw 2 for grinding.

[0034] Whether grinding the inner ring or the outer ring of the thin-walled bearing ring, the claws can wrap more of the thin-walled bearing ring to prevent the thin-walled bearing ring from deforming during grinding. The grinding tool of the present invention can be well applied to the processing of thin-walled bearing rings with thin wall thickness, large diameter and low height, and is particularly suitable for the grinding of bearing rings in CT machines with higher requirements, and has good application prospects.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. A grinding tool suitable for extra-large thin-walled bearing rings, characterized by: It includes a base, whose upper end surface is evenly distributed with a plurality of claws along the circumferential direction, the claws include a mounting plate for being fixedly connected to the base, one radial side of the mounting plate is provided with an overhang section, a plurality of spacing grooves are opened on the overhang section in the circumferential direction to form a plurality of rigid elastic arms, each rigid elastic arm is provided with a constraint block on the same circumference, the constraint block of each claw is used to support the processed bearing ring from the inside to the outside or to hold the processed bearing ring from the outside to the inside, the radial inner side surface and the radial outer side surface of the constraint block are provided with clamping inclined surfaces for facilitating the installation of the processed bearing ring, the inner side surface curvature of each constraint block is consistent with the outer circle curvature of the standard thin-walled bearing ring, and the outer side surface curvature is consistent with the inner circle curvature of the standard thin-walled bearing ring.

2. The grinding tool for extra-large thin-walled bearing rings according to claim 1 is characterized in that: The whole of the clamping claw is located just above the base, and a step surface is provided on the bottom surface of the mounting plate of the clamping claw so that a part of the plate section is separated from the upper surface of the base and forms the overhanging section.

3. The grinding tool for extra-large thin-walled bearing rings according to claim 2 is characterized in that: The mounting plate includes a fixed plate section for fixed connection with the base and a clamping plate section on one radial side of the fixed plate section. The clamping plate section extends in an arc shape and is longer than the fixed plate section in the circumferential direction. The overhanging section is on the clamping plate section.

4. The grinding tool for extra-large thin-walled bearing rings according to claim 3 is characterized in that: The clamping plate segment is located radially outside the fixed plate segment, the rigid elastic arm has parts located radially on both sides of the constraint block, and the length of the radially inner part is greater than the length of the radially outer part.

5. The grinding tool for extra-large thin-walled bearing rings according to claim 1 is characterized in that: The restraining block and the mounting plate are an integrally formed structure.

6. The grinding tool for extra-large thin-walled bearing rings according to claim 3 is characterized in that: The clamping claw and the base are adjustably installed along the radial direction of the base, and positioning structures for positioning the clamping claw at different radial positions are respectively arranged on the mounting plate and the base.

7. The grinding tool for extra-large thin-walled bearing rings according to claim 6 is characterized in that: The base is provided with groups of fastening bolt holes along its radial direction at the positions corresponding to each of the clamping claws, and the fixed plate section is provided with long slotted bolt holes at the positions corresponding to the groups of fastening bolt holes, so that the clamping claws can be adjusted along the radial direction of the base to adapt to the constraints on the inner and outer rings of the thin-walled bearing ring.

8. The grinding tool for extra-large thin-walled bearing rings according to claim 6 is characterized in that: The positioning structure is a positioning pin hole arranged on the base and the mounting plate, and a matching positioning pin.

9. The grinding tool for extra-large thin-walled bearing rings according to any one of claims 1 to 8, characterized in that: The circumferential interval between two adjacent claws is smaller than the circumferential length of a single claw.

10. The grinding tool for extra-large thin-walled bearing rings according to any one of claims 1 to 8, characterized in that: A plurality of lifting holes are evenly distributed on the base.

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