Superfinishing equipment and method for automobile bearing ring

Abstract

The invention provides superfinishing equipment and method for an automobile bearing ring, and relates to the field of superfinishing of automobile bearing rings. The superfinishing equipment for the automobile bearing ring comprises a case; the rotating mechanism is installed in the machine box, the rotating mechanism comprises an inner gear ring and a rotating support installed on the outer side of the inner gear ring, the rotating support is rotationally connected into the machine box, a plurality of clamping mechanisms are arranged on the inner side of the inner gear ring, and a plurality of through grooves used for the clamping mechanisms to work are distributed in the top wall of the machine box in a circumferential shape; and the driving assembly is arranged at the top of the machine box, and the X-axis driving mechanism, the Y-axis driving mechanism and the Z-axis driving mechanism mutually form a three-dimensional drive to drive the accurate grinding assembly to accurately grind the inner edge of the automobile bearing ring. The steel balls and the oilstones are arranged on the accurate grinding support in a matched mode, so that machining parameters are unified after the automobile bearing ring is machined, and the machining quality is stable.

Description

Technical Field

[0001] The invention relates to the technical field of ultra-finishing of bicycle bearing rings, in particular to ultra-finishing equipment and a method for ultra-finishing of automobile bearing rings. Background Art

[0002] Automotive bearings, also known as wheel hub bearings, are key components of automobiles. Their primary function is to carry weight and provide precise guidance for wheel rotation, requiring them to withstand both axial and radial loads. Automotive wheel hub bearings have evolved from first-generation double-row angular contact ball bearings to third-generation bearings with built-in ABS sensors. The third-generation wheel hub bearing unit incorporates the anti-lock braking system (ABS). The wheel hub unit is designed with an inner flange and an outer flange. The inner flange is bolted to the drive shaft, while the outer flange holds the entire bearing together.

[0003] Although automobile bearing rings have undergone many developments, their function remains the same. When used, the inner and outer rings are combined to realize the rotation of the balls, realizing the lateral and longitudinal matching loads of the car.

[0004] When ultra-finishing the raceways of existing automobile bearing rings, ultra-finishing machines are usually used to grind the raceways of the inner or outer edges. Such ultra-finishing machines usually process such parts one piece at a time, which is inefficient. When ultra-finishing machines are used to grind the raceways of automobile bearing rings, they use more sensor digital monitoring to control all parameters in the ultra-finishing grinding process of each bearing within the qualified range. Such an operation is bound to have a problem, that is, each processing parameter of the bearing ring only falls within the qualified range, but the parameters of each bearing ring are different. Then, when used in actual batches, the combination of the tolerances of the inner and outer rings of the bearing is likely to increase the mismatch rate. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the present invention provides an automobile bearing ring superfinishing equipment and method, which solves the problems of inconsistent bearing ring raceway fine grinding parameters and low processing efficiency during the existing automobile bearing ring processing.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an automobile bearing ring superfinishing equipment, comprising: Chassis; A rotating mechanism is installed in the chassis, comprising an inner gear ring and a rotating bracket installed outside the inner gear ring, the rotating bracket being rotatably connected within the chassis, the bottom of the inner gear ring being fixedly connected to a drive motor via a reducer, the drive motor being installed within the chassis, a plurality of clamping mechanisms being provided on the inner side of the inner gear ring, and a plurality of through slots for the operation of the clamping mechanisms being provided on the top wall of the chassis in a circumferentially distributed manner; A drive assembly is provided on the top of the chassis. The drive assembly includes an X-axis drive mechanism, a Y-axis drive mechanism, a Z-axis drive mechanism and a fine grinding assembly. The X-axis drive mechanism, the Y-axis drive mechanism and the Z-axis drive mechanism mutually form a three-dimensional drive to drive the fine grinding assembly to finely grind the inner edge of the automobile bearing ring; The fine grinding assembly includes a polygonal frame and multiple L-shaped fine grinding brackets evenly distributed at the bottom of the polygonal frame, the multiple fine grinding brackets are oriented in the same direction, the lower ends of the multiple fine grinding brackets are all horizontally set, the lower ends of the multiple fine grinding brackets are all installed with oil stones by bolts, and a steel ball is rotatably set at the lower end of one of the fine grinding brackets, and the steel ball has one side abutted against a contact rod, and the other end of the contact rod abuts against a pressure sensor, and the contact rod slides in the fine grinding bracket, and the pressure sensor is set in the fine grinding bracket.

[0007] Preferably, the X-axis drive mechanism, the Y-axis drive mechanism and the Z-axis drive mechanism are all the same, and the X-axis drive mechanism, the Y-axis drive mechanism and the Z-axis drive mechanism all include a slide rail, a slide seat, a ball screw and a synchronous motor, the slide seat slides in the slide rail, the ball screw is connected to the slide seat through a nut pair, the ball screw rotates in the slide rail, and one end of the ball screw passes through the slide rail and is connected to the synchronous motor through a coupling.

[0008] Preferably, each of the clamping mechanisms includes a base and a gear installed at the bottom of the base. The gears are distributed in a circular state and are engaged with the inner side of the inner gear ring. The bases are rotatably installed on the inner wall of the chassis. The top of the base is provided with a plurality of mounting grooves in a circular shape, and a plurality of extension mechanisms are arranged in the mounting grooves.

[0009] Preferably, the extension mechanism includes support arms evenly distributed on the side walls of the platform, the top ends of the support arms are hinged with electric telescopic rods, the driving ends of the electric telescopic rods are hinged with rotating seats, the rotating seats are hinged in the mounting grooves, and a work station is provided on the top of the platform and an automobile bearing ring is provided on the work station.

[0010] Preferably, there are two X-axis drive mechanisms and they are symmetrically installed on the top of the chassis. A group of vertical rods are fixed on the slide of each X-axis drive mechanism, and a horizontal cross bar is fixed on the top of each group of vertical rods. Both ends of each cross bar are connected to the Y-axis drive mechanism, and the slide of each Y-axis drive mechanism is connected to the slide rail of the Z-axis drive mechanism. The slide of the Z-axis drive mechanism is fixed with a connecting rod, and the close side of the connecting rod is fixed to the polygonal frame.

[0011] Preferably, the polygonal frame is centrally symmetrically arranged, the number of the fine grinding brackets and the clamping mechanism is the same, and the fine grinding brackets are all arranged one-to-one directly above the clamping mechanism.

[0012] Preferably, a method for ultra-finishing an automobile bearing ring, wherein the equipment used for ultra-finishing the automobile bearing ring is the automobile bearing ring ultra-finishing equipment described above, comprises the following steps: Step S1, installation: select an automobile bearing ring to be processed and process it into a qualified product on a bearing superfinishing machine, and place the qualified product as a processing sample on a base of a clamping mechanism directly opposite to a fine grinding bracket with a steel ball. Then, automobile bearing rings that need to be superfinished are placed on several other bases. The electric telescopic rod in the extension mechanism extends with the support arm to make the rotating seat on each clamping mechanism move synchronously to clamp and fix the automobile bearing ring on the corresponding base. After installation, the center lines of each automobile bearing ring and the base are on the same straight line. Step S2, processing: through the coordinated operation of the X-axis drive mechanism, the Y-axis drive mechanism, and the Z-axis drive mechanism, the fine grinding bracket with the oilstone is moved close to the position of the automobile bearing ring that needs to be polished, and one of the fine grinding brackets with the steel ball 30 is positioned at the same position of the automobile bearing ring. The driving motor drives the inner gear ring to rotate through the reducer. When the inner gear ring rotates in the chassis through the rotating bracket, multiple gears rotate synchronously in the same direction. The gears drive the base to rotate, and the automobile bearing ring on the base rotates synchronously. Step S3, movement: After the oil stone grinds and reduces the corresponding automobile bearing ring part, the steel ball contacts the corresponding position surface of the qualified automobile bearing ring and rotates, and then squeezes the contact rod to make the pressure sensor display the value. After the pressure sensor displays the contact value, the oil stone moves through the coordinated operation of the X-axis drive mechanism, the Y-axis drive mechanism, and the Z-axis drive mechanism to grind other parts of the automobile bearing ring.

[0013] The present invention provides an apparatus and method for ultra-finishing automobile bearing rings. It has the following beneficial effects: The present invention sets a qualified automobile bearing ring as a processing reference model, and then cooperates with the X-axis drive mechanism, the Y-axis drive mechanism, and the Z-axis drive mechanism to make the fine grinding bracket with the oil stone close to the position where the automobile bearing ring needs to be polished, and makes one of the fine grinding brackets with the steel ball 30 at the same position of the automobile bearing ring. The driving motor drives the inner gear ring to rotate through the reducer, and when the inner gear ring rotates in the chassis through the rotating bracket, multiple gears rotate synchronously in the same direction, the gears drive the support to rotate, and the automobile bearing ring on the support rotates synchronously. After the oil stone polishes and reduces the corresponding automobile bearing ring part, the steel ball contacts the qualified automobile bearing ring. The corresponding position surface of the car bearing ring is rotated, and then the contact rod is squeezed to make the pressure sensor display the value. After the pressure sensor displays the contact value, the oil stone is moved through the coordinated operation of the X-axis drive mechanism, the Y-axis drive mechanism, and the Z-axis drive mechanism to grind other parts of the automobile bearing ring. This setting enables each bearing ring that is finely ground to form close processing parameters during the processing of the bearing ring. The parameters of the bearing rings processed in the same batch are all within the model parameter range, so that the quality of the bearing rings processed in the batch is close, which improves the yield rate during subsequent assembly. At the same time, the bearing rings with close parameters can ensure the stability of the processed product quality.

[0014] The present invention cooperates with a polygonal frame and a fine grinding bracket, and combines multiple clamping mechanisms to achieve the ability to process multiple automobile bearing rings at one time, thereby improving the processing efficiency of the automobile bearing rings and enhancing the stability of batch quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A perspective view of the present invention; Figure 2 is a perspective view of the rotating mechanism of the present invention; Figure 3 is a three-dimensional diagram of the clamping mechanism of the present invention; Figure 4 is a perspective view of the extension mechanism of the present invention; Figure 5 is a perspective view of the fine grinding assembly of the present invention; Figure 6 is a perspective view of a drive assembly of the present invention; Figure 7 A perspective view of the Z-axis drive mechanism of the present invention; Figure 8 A partial view of the connection between the fine grinding support and the oilstone of the present invention; Figure 9 This is a partial diagram of the connection between the fine grinding bracket and the steel ball of the present invention; Figure 10 This is a cross-sectional structural diagram of the connection between the fine grinding bracket and the steel ball of the present invention.

[0016] Among them, 1. Chassis; 2. X-axis drive mechanism; 3. Vertical rod; 4. Horizontal rod; 5. Y-axis drive mechanism; 6. Z-axis drive mechanism; 7. Connecting rod; 8. Polygonal frame; 9. Fine grinding bracket; 10. Rotating mechanism; 11. Drive assembly; 12. Drive motor; 13. Rotating bracket; 14. Inner ring gear; 15. Gear; 16. Base; 17. Extension mechanism; 18. Support arm; 19. Electric telescopic rod; 20. Rotating seat; 21. Mounting slot; 22. Clamping mechanism; 23. Fine grinding assembly; 24. Contact rod; 25. Oilstone; 26. Synchronous motor; 27. Slide rail; 28. Slide seat; 29. Ball screw; 30. Steel ball; 31. Pressure sensor. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] Example 1:

[0019] Referring to Figures 1-10, an embodiment of the present invention provides an automobile bearing ring ultra-finishing device, comprising: Chassis 1; The rotating mechanism 10 is installed in the chassis 1. The rotating mechanism 10 includes an inner ring gear 14 and a rotating bracket 13 installed on the outside of the inner ring gear 14. The rotating bracket 13 is rotatably connected to the chassis 1. The bottom of the inner ring gear 14 is fixedly connected to the drive motor 12 through a reducer. The drive motor 12 is installed in the chassis 1. A plurality of clamping mechanisms 22 are provided on the inner side of the inner ring gear 14. The top wall of the chassis 1 is circumferentially distributed and has a plurality of through grooves for the operation of the clamping mechanisms 22. The drive assembly 11 is arranged on the top of the chassis 1. The drive assembly 11 includes an X-axis drive mechanism 2, a Y-axis drive mechanism 5, a Z-axis drive mechanism 6 and a fine grinding assembly 23. The X-axis drive mechanism 2, the Y-axis drive mechanism 5, and the Z-axis drive mechanism 6 form a three-dimensional drive to drive the fine grinding assembly 23 to finely grind the inner edge of the automobile bearing ring; The fine grinding assembly 23 includes a polygonal frame 8 and a plurality of L-shaped fine grinding brackets 9 evenly distributed at the bottom of the polygonal frame 8. The plurality of fine grinding brackets 9 face the same direction, and the lower ends of the plurality of fine grinding brackets 9 are all arranged horizontally. The lower ends of the plurality of fine grinding brackets 9 are all installed with oilstones 25 by bolts. A steel ball 30 is rotatably set at the lower end of one of the fine grinding brackets 9. The steel ball 30 has a contact rod 24 on one side of the steel ball 30, and the other end of the contact rod 24 abuts on the pressure sensor 31. The contact rod 24 slides in the fine grinding bracket 9, and the pressure sensor 31 is arranged in the fine grinding bracket 9. The X-axis drive mechanism 2, the Y-axis drive mechanism 5, and the Z-axis drive mechanism 6 cooperate to operate, so that the fine grinding bracket 9 with the oilstone 25 is close to the position where the automobile bearing ring needs to be polished, so that one of the fine grinding brackets 9 with the steel ball 30 is at the same position of the automobile bearing ring. The drive motor 12 drives the inner gear ring 14 to rotate through the reducer, and the inner gear ring 14 rotates in the chassis 1 through the rotating bracket 13. At this time, multiple gears 15 rotate synchronously in the same direction, and the gear 15 drives the support 16 to rotate, and the automobile bearing ring on the support 16 rotates synchronously. After the oil stone 25 grinds and reduces the corresponding automobile bearing ring part, the steel ball 30 contacts the corresponding position surface of the qualified automobile bearing ring and rotates, and then squeezes the contact rod 24 to make the pressure sensor 31 display the value. After the pressure sensor 31 displays the contact value, the X-axis drive mechanism 2, the Y-axis drive mechanism 5, and the Z-axis drive mechanism 6 cooperate to move the oil stone 25 and then grind other parts of the automobile bearing ring. The pressure sensor 31 is connected to the single-chip microcomputer to display the data on the display. The value of the constant pressure sensor 31 can be set. When the value of the pressure sensor 31 reaches a certain level, the position of the oil stone 25 is replaced to grind other raceway parts of the automobile bearing ring. When the oil stone 25 grinds the automobile bearing ring, it is necessary to supply grinding fluid to facilitate cooling and lubrication, thereby improving the smoothness and structural density of the automobile bearing ring raceway.

[0020] The X-axis drive mechanism 2, the Y-axis drive mechanism 5 and the Z-axis drive mechanism 6 are all the same. The X-axis drive mechanism 2, the Y-axis drive mechanism 5 and the Z-axis drive mechanism 6 all include a slide rail 27, a slide seat 28, a ball screw 29 and a synchronous motor 26. The slide seat 28 slides in the slide rail 27. The ball screw 29 is connected to the slide seat 28 through a nut pair. The ball screw 29 rotates in the slide rail 27. One end of the ball screw 29 passes through the slide rail 27 and is connected to the synchronous motor 26 through a coupling. The components with the same setting can ensure that when driving the polygonal frame 8, synchronous operation can be achieved and the processing accuracy is high.

[0021] Each clamping mechanism 22 includes a base 16 and a gear 15 installed at the bottom of the base 16. The gears 15 are distributed in a circular state and are all meshed on the inner side of the inner ring gear 14. The bases 16 are all rotatably installed on the inner wall of the chassis 1. A plurality of mounting grooves 21 are opened in a circular shape on the top of the base 16. A plurality of extension mechanisms 17 are arranged in the mounting grooves 21. The base 16 is installed in the chassis 1 through a bracket. The base 16 rotates independently when working. The drive motor 12 drives the inner ring gear 14 to rotate through the reducer. The inner ring gear 14 drives the meshed gear 15 to rotate. The gear 15 rotates through the base 16, so that the base 16 drives the automobile bearing ring to rotate and grind during processing.

[0022] The extension mechanism 17 includes support arms 18 evenly distributed on the side walls of the platform 16. The top ends of the support arms 18 are hinged with electric telescopic rods 19. The driving ends of the electric telescopic rods 19 are hinged with rotating seats 20. The rotating seats 20 are hinged in the mounting grooves 21. A work station is provided on the top of the platform 16 and an automobile bearing ring is provided on the work station. The multiple electric telescopic rods 19 on each group of clamping mechanisms 22 move synchronously and are controlled by a single-chip microcomputer to achieve synchronous support of the automobile bearing ring, ensuring that the support force is stable and will not tilt. A corresponding mounting position is provided on the platform 16, and combined with the extension mechanism 17, the automobile bearing ring is fixed more stably.

[0023] There are two X-axis drive mechanisms 2 and they are symmetrically installed on the top of the chassis 1. A group of vertical rods 3 are fixed on the slide 28 of each X-axis drive mechanism 2, and a horizontal cross bar 4 is fixed on the top of each group of vertical rods 3. Both ends of each cross bar 4 are connected to the Y-axis drive mechanism 5, and the slide 28 of each Y-axis drive mechanism 5 is connected to the slide rail 27 of the Z-axis drive mechanism 6. The slide 28 of the Z-axis drive mechanism 6 is fixed with a connecting rod 7, and the side of the connecting rod 7 close to each other is fixed to the polygonal frame 8. The X-axis drive mechanism 2, the Y-axis drive mechanism 5, and the Z-axis drive mechanism 6 cooperate to operate synchronously to achieve synchronous driving of the polygonal frame 8, so that the processed products will have stable and uniform quality.

[0024] The polygonal frame 8 is arranged in a centrally symmetrical manner, and the number of fine grinding brackets 9 and clamping mechanisms 22 is the same. The fine grinding brackets 9 are all arranged one by one directly above the clamping mechanism 22, so that the fine grinding brackets 9 can perform fine grinding on the bearing ring through the oilstone 25. When the oilstone 25 fine grinds the bearing ring, the X-axis drive mechanism 2, the Y-axis drive mechanism 5, and the Z-axis drive mechanism 6 cooperate to operate so that the bearing ring can swing within a small range, thereby improving the grinding efficiency. The X-axis drive mechanism 2, the Y-axis drive mechanism 5, and the Z-axis drive mechanism 6 cooperate to operate, and a single-chip microcomputer is used to make them operate synchronously, so that no motion interference will occur.

[0025] Example 2:

[0026] Reference Figures 1-10As shown, an embodiment of the present invention provides a method for ultra-finishing an automobile bearing ring. The equipment used for ultra-finishing an automobile bearing ring is the ultra-finishing equipment for ultra-finishing an automobile bearing ring described above, including the following steps: Step S1, installation: select an automobile bearing ring to be processed and process it into a qualified product on the bearing superfinishing machine, and set the qualified product as a processing sample on the base 16 of the clamping mechanism 22 directly opposite the fine grinding bracket 9 with the steel ball 30, and then place the automobile bearing rings that need to be superfinished on the other several bases 16, and the electric telescopic rod 19 in the extension mechanism 17 is extended by relying on the support arm 18 to make the rotating seat 20 on each clamping mechanism 22 move synchronously to clamp and fix the automobile bearing ring on the corresponding base 16. After installation, the center lines of each automobile bearing ring and the base 16 are on the same straight line. One automobile bearing ring is used as the processing sample, and the remaining stations are all coordinated with the blanks of the automobile bearing ring. One template is used as a blueprint for multiple blanks, so that the bearing ring processing can use the template as a model to process bearing rings with similar parameters, thereby ensuring stable processing quality; Step S2, processing: through the coordinated operation of the X-axis drive mechanism 2, the Y-axis drive mechanism 5, and the Z-axis drive mechanism 6, the fine grinding bracket 9 with the oilstone 25 is moved close to the position where the automobile bearing ring needs to be polished, and one of the fine grinding brackets 9 with the steel ball 30 is positioned at the same position of the automobile bearing ring. The driving motor 12 drives the inner gear ring 14 to rotate through the reducer. When the inner gear ring 14 rotates in the chassis 1 through the rotating bracket 13, the multiple gears 15 rotate synchronously in the same direction. The gears 15 drive the base 16 to rotate, and the automobile bearing ring on the base 16 rotates synchronously. Step S3, movement: After the oilstone 25 grinds and reduces the corresponding part of the automobile bearing ring, the steel ball 30 contacts the corresponding position surface of the qualified automobile bearing ring and rotates, and then squeezes the contact rod 24 to make the pressure sensor 31 display a value. After the pressure sensor 31 displays the contact value, the oilstone 25 moves through the coordinated operation of the X-axis drive mechanism 2, the Y-axis drive mechanism 5, and the Z-axis drive mechanism 6 to grind other parts of the automobile bearing ring.

[0027] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An automobile bearing ring superfinishing equipment, characterized by: include: Chassis (1); A rotating mechanism (10), wherein the rotating mechanism (10) is installed in a chassis (1), the rotating mechanism (10) comprises an inner gear ring (14) and a rotating bracket (13) installed outside the inner gear ring (14), the rotating bracket (13) is rotatably connected in the chassis (1), the bottom of the inner gear ring (14) is fixedly connected to a driving motor (12) via a speed reducer, the driving motor (12) is installed in the chassis (1), a plurality of clamping mechanisms (22) are arranged inside the inner gear ring (14), and a plurality of through grooves for the clamping mechanisms (22) are circumferentially distributed and provided on the top wall of the chassis (1); A drive assembly (11), the drive assembly (11) is arranged on the top of the chassis (1), the drive assembly (11) includes an X-axis drive mechanism (2), a Y-axis drive mechanism (5), a Z-axis drive mechanism (6) and a fine grinding assembly (23), the X-axis drive mechanism (2), the Y-axis drive mechanism (5), and the Z-axis drive mechanism (6) mutually forming a three-dimensional drive to drive the fine grinding assembly (23) to finely grind the inner edge of the automobile bearing ring; The fine grinding assembly (23) includes a polygonal frame (8) and a plurality of L-shaped fine grinding brackets (9) evenly distributed at the bottom of the polygonal frame (8), wherein the plurality of fine grinding brackets (9) face the same direction, the lower ends of the plurality of fine grinding brackets (9) are all arranged horizontally, and the lower ends of the plurality of fine grinding brackets (9) are all installed with oilstones (25) through bolts, wherein a steel ball (30) is rotatably arranged at the lower end of one of the fine grinding brackets (9), and one side of the steel ball (30) abuts against a contact rod (24), and the other end of the contact rod (24) abuts against a pressure sensor (31), and the contact rod (24) slides in the fine grinding bracket (9), and the pressure sensor (31) is arranged in the fine grinding bracket (9).

2. The automobile bearing ring superfinishing equipment according to claim 1, characterized in that: The X-axis drive mechanism (2), the Y-axis drive mechanism (5) and the Z-axis drive mechanism (6) are all the same. The X-axis drive mechanism (2), the Y-axis drive mechanism (5) and the Z-axis drive mechanism (6) all include a slide rail (27), a slide seat (28), a ball screw (29) and a synchronous motor (26). The slide seat (28) slides in the slide rail (27). The ball screw (29) is connected to the slide seat (28) through a nut pair. The ball screw (29) rotates in the slide rail (27). One end of the ball screw (29) passes through the slide rail (27) and is connected to the synchronous motor (26) through a coupling.

3. The automobile bearing ring superfinishing equipment according to claim 1, characterized in that: Each of the clamping mechanisms (22) includes a support platform (16) and a gear (15) mounted at the bottom of the support platform (16), wherein the gears (15) are distributed in a circular state and are all meshed with the inner side of the inner gear ring (14), and the support platforms (16) are all rotatably mounted on the inner wall of the chassis (1), and a plurality of mounting grooves (21) are opened in a circular shape on the top of the support platform (16), and a plurality of extension mechanisms (17) are arranged in the mounting grooves (21).

4. The automobile bearing ring superfinishing equipment according to claim 3, characterized in that: The extension mechanism (17) includes support arms (18) evenly distributed on the side walls of the support platform (16), the top ends of the support arms (18) are hinged with electric telescopic rods (19), the driving ends of the electric telescopic rods (19) are hinged with rotating seats (20), and the rotating seats (20) are hinged in the mounting grooves (21). A work station is provided on the top of the support platform (16) and an automobile bearing ring is provided on the work station.

5. The automobile bearing ring superfinishing equipment according to claim 2, characterized in that: There are two X-axis drive mechanisms (2) symmetrically mounted on the top of the chassis (1), a group of vertical rods (3) are fixed on the slide (28) of each X-axis drive mechanism (2), a horizontally arranged cross bar (4) is fixed on the top of each group of vertical rods (3), both ends of each cross bar (4) are connected to the Y-axis drive mechanism (5), the slide (28) of each Y-axis drive mechanism (5) is connected to the slide rail (27) of the Z-axis drive mechanism (6), and the slide (28) of the Z-axis drive mechanism (6) is fixed with a connecting rod (7), and the adjacent side of the connecting rod (7) is fixed to the polygonal frame (8).

6. The automobile bearing ring superfinishing equipment according to claim 1, characterized in that: The polygonal frame (8) is centrally symmetrically arranged, the number of the fine grinding brackets (9) and the clamping mechanism (22) is the same, and the fine grinding brackets (9) are all arranged one-to-one directly above the clamping mechanism (22).

7. A method for ultra-finishing an automobile bearing ring, wherein the equipment used for ultra-finishing the automobile bearing ring is an automobile bearing ring ultra-finishing equipment as described in claims 1 to 6, characterized in that: The following steps are involved: Step S1, installation: select an automobile bearing ring to be processed and process it into a qualified product on a bearing superfinishing machine, and place the qualified product as a processing sample on the support (16) of the clamping mechanism (22) directly opposite to the bottom of the fine grinding bracket (9) with the steel ball (30), and then place the automobile bearing rings that need to be superfinished on the other several support platforms (16), and the electric telescopic rod (19) in the extension mechanism (17) is extended by relying on the support arm (18) to make the rotating seat (20) on each clamping mechanism (22) move synchronously to clamp and fix the automobile bearing ring on the corresponding support platform (16). After installation, the center lines of each automobile bearing ring and the support platform (16) are on the same straight line; Step S2, processing: through the coordinated operation of the X-axis drive mechanism (2), the Y-axis drive mechanism (5), and the Z-axis drive mechanism (6), the fine grinding bracket (9) with the oilstone (25) is close to the position where the automobile bearing ring needs to be polished, so that one of the fine grinding brackets (9) with the steel ball 30 is at the same position as the automobile bearing ring, the driving motor (12) drives the inner gear ring (14) to rotate through the reducer, and when the inner gear ring (14) rotates in the chassis (1) through the rotating bracket (13), the multiple gears (15) rotate synchronously in the same direction, the gears (15) drive the support (16) to rotate, and the automobile bearing ring on the support (16) rotates synchronously; Step S3, moving: After the oil stone (25) grinds and reduces the corresponding automobile bearing ring part, the steel ball (30) contacts the corresponding position surface of the qualified automobile bearing ring and rotates, and then squeezes the contact rod (24) to make the pressure sensor (31) display a value. After the pressure sensor (31) displays the contact value, the oil stone (25) moves through the coordinated operation of the X-axis drive mechanism (2), the Y-axis drive mechanism (5), and the Z-axis drive mechanism (6) to grind other parts of the automobile bearing ring.

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