Ultra-precision polishing machine for bearing retainer

Abstract

The invention relates to the technical field of bearing retainers, and particularly discloses a bearing retainer ultra-precision polishing machine which comprises a feeding unit, one end of the feeding unit is connected with a material carrying and rotating unit, and a vibration polishing groove, a magnetic polishing groove, a chemical polishing groove and a cleaning groove are sequentially formed in the periphery of the material carrying and rotating unit; the material loading rotating unit comprises a base and a stand column, a rotating table and a carrying plate which rotate synchronously are arranged at the upper end of the stand column, a plurality of material loading expansion shafts are evenly arranged on the carrying plate in the circumferential direction, and each material loading expansion shaft is connected with a telescopic driving part on the rotating table, so that the material loading expansion shafts are switched between the horizontal state and the vertical downward state. Through the design of the material loading rotating unit, a plurality of originally dispersed procedures such as vibration polishing, magnetic polishing, chemical polishing and cleaning are integrated in one device, and automatic circulation of workpieces among different stations is achieved; the problems of low automation degree, low production efficiency, large occupied area and the like of a traditional substation type operation mode are thoroughly solved.

Description

Technical Field

[0001] This invention relates to the field of bearing retainer technology, and specifically discloses an ultra-precision polishing machine for bearing retainers. Background Technology

[0002] The bearing cage is a crucial component of a bearing, and the polishing effect of its surface largely determines the overall quality of the bearing. The ultra-precision polishing process for bearing cages typically involves several independent steps, such as vibratory polishing and magnetic polishing to remove burrs and flash, and chemical polishing or electrolytic polishing to achieve an ultra-smooth, stress-free surface.

[0003] However, the existing multi-stage ultra-precision polishing process for bearing retainers generally adopts a station-based operation mode. That is, after mechanical polishing such as vibration polishing and magnetic polishing, it is then manually transferred to chemical polishing or electrolytic polishing equipment for further processing. The whole process not only has a low degree of automation and low production efficiency, but also occupies a large amount of production space due to the multiple independent equipment and the required transfer space between them.

[0004] Invention application No. 202510524077.7 discloses a magnetic polishing device for bearing cages, including a magnetic polishing machine and a turning frame located at the front end of the magnetic polishing machine. A collection trough is provided on the right side of the turning frame. A segmented support frame is connected to the turning frame via a turning mechanism. The turning mechanism includes a drive cylinder, a sliding table, a turning rod, an arc-shaped top shell, a turning guide groove, and a circular slider. An equalization mechanism is provided within the segmented support frame, comprising a set of horizontal fixing plates and several vertical adjusting plates. A collection box is placed in the collection trough. This technical solution uses magnetic polishing to polish bearing cages, and by segmenting the bearing cages to be magnetically polished, collision damage can be prevented during the magnetic polishing process, ensuring the final product quality. However, magnetic polishing alone is insufficient to achieve ultra-precision polishing. The magnetic polishing device for the bearing cage requires additional chemical or electrolytic polishing methods to ensure optimal results. However, combining multiple devices for multi-stage polishing presents technical challenges such as low automation and large footprint. Therefore, this application proposes an ultra-precision polishing machine for bearing cages that effectively solves these technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide an ultra-precision polishing machine for bearing cages that integrates multiple polishing processes such as mechanical polishing and chemical polishing, in order to solve the above-mentioned shortcomings of existing magnetic polishing devices for bearing cages.

[0006] This invention is achieved through the following technical solution: A bearing retainer ultra-precision polishing machine includes a feeding unit, one end of which is connected to a material-carrying rotating unit. Vibration polishing tank, magnetic polishing tank, chemical polishing tank and cleaning tank are arranged sequentially around the material-carrying rotating unit. The material-carrying rotating unit base and column, the upper end of the column is provided with a synchronously rotating rotating table and a carrier plate, and the column is provided with a power component to drive the rotating table and the carrier plate to rotate. The carrier plate is circumferentially provided with a plurality of material-carrying expansion shafts for mounting bearing retainers, and each material-carrying expansion shaft is connected to a telescopic drive component on the rotating table, so that the material-carrying expansion shaft can switch between a horizontal and a vertically downward state. The feeding unit is connected to the horizontally positioned material-carrying expansion shaft to complete the feeding. The vibratory polishing tank, magnetic polishing tank, chemical polishing tank, and cleaning tank are respectively connected to the vertically downward-positioned material-carrying expansion shaft to perform corresponding polishing and cleaning treatments on the bearing retainer.

[0007] As a further provision of the above scheme, the material-carrying expansion shaft includes a hollow shaft, a plurality of tensioning key bars radially arranged on the hollow shaft, and a pressing rod axially arranged inside the hollow shaft. One end of the pressing rod extends out of the end of the hollow shaft and is connected to a magnetic end block. A spring is provided between the magnetic end block and the end of the hollow shaft. Elastic rings are sleeved on the plurality of tensioning key bars, and a slanted groove is opened at the radial inner end of the tensioning key bars. An inclined pressing block that interacts with the slanted groove is provided on the pressing rod located inside the hollow shaft.

[0008] As a further provision of the above scheme, a first frame and a second frame are provided on the column extending above the carrier plate. The first frame is provided with a first electromagnet that is radially aligned with the magnetic end block on the loading expansion shaft in the horizontal state at the loading station. The first frame is provided with a second electromagnet that is vertically aligned with the magnetic end block on the loading expansion shaft in the vertical state at the unloading station.

[0009] As a further feature of the above scheme, the outer edge of the carrier plate is provided with a plurality of rotating connecting seats in a ring array, and a notch is provided at the lower end of the rotating connecting seats. The hollow shaft is rotatably installed in the rotating connecting seats, and the lower end of the hollow shaft is provided with a groove plate connected to the telescopic drive component.

[0010] As a further provision of the above scheme, an intermediate rinsing device is provided between the magnetic polishing tank and the chemical polishing tank. The intermediate rinsing device includes a liquid collection tank, two semi-cylindrical covers that can be opened and closed in the liquid collection tank, a push cylinder for driving the semi-cylindrical covers to open and close, and a spray assembly provided inside the semi-cylindrical covers.

[0011] As a further provision of the above scheme, the spray assembly includes a spray pipe and a plurality of spray nozzles disposed on the spray pipe, and the spray pipe is connected to an external water source through a pipe and a water pump.

[0012] As a further provision of the above scheme, the feeding unit includes a conveyor belt assembly, and the conveying direction of the conveyor belt assembly is aligned with the axial direction of the horizontally positioned loading shaft at the feeding station. The outer surface of the conveyor belt of the conveyor belt assembly is provided with multiple positioning slots at equal intervals for positioning and conveying the bearing retainer.

[0013] As a further provision of the above scheme, the power component includes a power motor, a gear is provided on the motor shaft of the power motor, and a gear ring that meshes with the gear is provided on the rotary table.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention achieves highly integrated and fully automated production. Through the design of the material-carrying rotating unit, it integrates multiple processes such as vibration polishing, magnetic polishing, chemical polishing and cleaning, which were originally scattered, into one device. It also utilizes the material-carrying expansion shaft with switchable posture to realize the automatic flow of workpieces between different workstations, which completely solves the problems of low automation, low production efficiency and large footprint of traditional station-type operation mode.

[0015] 2. The material-carrying expansion shaft in this invention adopts a mechanical-magnetic control composite design. An internal spring provides stable tension, while an external electromagnet enables rapid and non-destructive clamping, ensuring the reliability of workpiece clamping during mechanical polishing and immersion polishing. It also achieves rapid loading and unloading, significantly improving the overall production cycle time. Furthermore, in conjunction with the loading unit, it allows for the evenly spaced arrangement of workpieces during polishing, preventing collisions and damage, and effectively guaranteeing the quality of the polished workpiece.

[0016] 3. Furthermore, the present invention effectively solves the problem of cross-contamination in the process through the design of the intermediate rinsing device. It can perform a closed-loop, high-efficiency spray rinsing on the workpiece before it enters the chemical polishing tank with extremely high cleanliness requirements, thoroughly removing the abrasive and impurities remaining in the previous process, effectively protecting the purity and stability of the chemical polishing tank solution, ensuring the ultra-precision polishing quality of the final product, and extending the service life of the chemical polishing tank solution. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a top view schematic diagram of the structure of the present invention; Figure 3 This is a three-dimensional structural diagram of the feeding unit in this invention; Figure 4 This is a three-dimensional structural diagram of the material-carrying rotating unit in this invention; Figure 5 This is a three-dimensional cross-sectional structural diagram of the material-carrying expansion shaft in this invention; Figure 6 For the present invention Figure 1 Enlarged structural diagram at point A; Figure 7 This is a three-dimensional structural diagram of the material-carrying expansion shaft and intermediate flushing device in this invention. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The following will refer to the appendix... Figures 1-7 This application will be described in detail with reference to the embodiments. Example 1

[0021] Example 1 discloses an ultra-precision polishing machine for bearing retainers, see attached figure. Figure 1 and attached Figure 2 The main body of the polishing machine includes a feeding unit 10, a material-carrying rotating unit 20, a vibratory polishing tank 30, a magnetic polishing tank 40, a chemical polishing tank 50, and a cleaning tank 60. The feeding unit 10 is located on one side of the feeding station of the material-carrying rotating unit 20, while the material-carrying rotating unit 20, the vibratory polishing tank 30, the magnetic polishing tank 40, the chemical polishing tank 50, and the cleaning tank 60 are arranged sequentially around the material-carrying rotating unit 20.

[0022] Reference Appendix Figure 3The feeding unit 10 includes a side frame 101, and a conveyor seat 102 is provided at the upper end of the side frame 101. A conveyor belt assembly 104 is provided in the conveyor seat 102, and a plurality of positioning slots 105 are provided at equal intervals on the outer surface of the conveyor belt of the conveyor belt assembly 104, so that the bearing retainer can be positioned and fixed by the positioning slots 105, and then move radially toward the material loading rotation unit 20 as the conveyor belt assembly 104 moves.

[0023] Reference Appendix Figure 4 The material-carrying rotation unit 20 includes a base 201, with a column 202 fixedly mounted at the center of the base 201. A rotary table 203 is rotatably mounted on the upper end of the column 202 via an internal bearing. A carrier plate 204 is fixedly mounted on the upper end of the rotary table 203, and a gear ring 205 is provided on the lower end of the rotary table 203. A power motor 206 is fixed on the column 202, and a gear meshing with the gear ring 205 is provided on the output shaft of the power motor 206. In specific design, both the rotary table 203 and the carrier plate 204 can be set as regular polygons or cylinders to ensure the stability of the rotation of the rotary table 203 and the carrier plate 204 on the column 202.

[0024] Multiple rotating connecting seats 2041 are arranged in a circular array on the outer edge of the carrier plate 204, and a notch 2042 is provided at the lower end of the rotating connecting seat 2041. At the same time, a telescopic drive member 205 corresponding to each rotating connecting seat 2041 is rotatably connected to the rotary table 203. Each rotating connecting seat 2041 is rotatably connected to a material-carrying expansion shaft 206, and the lower end of the material-carrying expansion shaft 206 near the notch 2042 is provided with a groove plate 207 that connects to the telescopic end of the telescopic drive member 205. Under the action of the telescopic drive member 205, the material-carrying expansion shaft 206 can switch between a horizontal and vertically downward state around the rotating connecting seat 2041. When the loading shaft 206 rotates to be radially aligned with the feeding unit 10, the loading shaft 206 is in a horizontal state, and the conveyor belt assembly 104 and the positioning slot block 105 can fit multiple bearing retainers onto the loading shaft 206 at one time; when the loading shaft 206 rotates to the position of the vibratory polishing tank 30, magnetic polishing tank 40, chemical polishing tank 50 or cleaning tank 60, the loading shaft 206 is in a vertically downward state, so that the multiple bearing retainers that are tightened and fixed are inserted into the corresponding slots for corresponding processing.

[0025] Reference Appendix Figure 5 and attached Figure 6The material-carrying expansion shaft 206 includes a hollow shaft 2061. Multiple axial slots are evenly opened on the outer circular surface of the hollow shaft 2061. A matching tension key 2062 is provided in each axial slot. An elastic ring (not shown in the figure) for achieving convergence and retraction is sleeved on the periphery of all tension key 2062. At the same time, a slanted groove is opened at the radial inner end of each tension key 2062. A pressing rod 2063 is inserted into the hollow shaft 2061, extending radially into the inner end of the hollow shaft 2061. The pressing rod 2063 is provided with an inclined pressing block 2064 that presses against the inclined groove. A magnetic end block 2065 is provided at the outer end of the pressing rod 2063 extending from the hollow shaft 2061. A spring 2066 is provided between the magnetic end block 2065 and the hollow shaft 2061, so that under the action of the spring 2066, all the tensioning key bars 2062 can move radially outward, thereby tightening and fixing the bearing retainer sleeved on the periphery of the hollow shaft 2061.

[0026] Finally, a first frame 208 and a second frame 209 are provided above the column 202 extending from the carrier plate 204. The first frame 208 is located at the loading station, which is radially aligned with the conveyor belt assembly 104, and its end is provided with a first electromagnet 210 that can interact with the loading expansion shaft 206 at the loading station. The second frame 209 is located at the unloading station, and its end is provided with a second electromagnet 211, which is vertically aligned with the loading expansion shaft 206. Finally, a discharge inclined groove 212 is provided on the base 201 at the unloading station.

[0027] Before operation, the ultra-precision polishing machine for bearing retainers disclosed in Embodiment 1 adds polishing abrasive, magnetic needle, polishing chemical solvent and cleaning liquid to the vibratory polishing tank 30, magnetic polishing tank 40, chemical polishing tank 50 and cleaning tank 60 respectively, and then starts the entire equipment.

[0028] After the equipment is running, the conveyor belt assembly 104 and the positioning slot block 105 move multiple bearing retainers toward the horizontally positioned loading shaft 206, so that the bearing retainers are evenly spaced and fitted onto the loading shaft 206 (during this process, the first electromagnet 210 is energized, causing it to attract the magnetic end block 2065 upwards, causing the pressing rod 2063 to move outwards against the force of the spring 2066, and then multiple tensioning key bars 2062 are radially gathered together, making it convenient for the bearing retainers to be fitted into them). After the bearing retainers are loaded, the current to the first electromagnet 210 is disconnected. At this time, the loading shaft 206 will tighten and fix the multiple bearing retainers under the force of the spring 2066.

[0029] Subsequently, the power motor 206 rotates, and under the meshing transmission of the gear and gear ring 205, the rotary table 203, the carrier plate 204, and the material-carrying expansion shaft 206 rotate. Whenever the material-carrying expansion shaft 206 rotates directly above the vibratory polishing tank 30, the magnetic polishing tank 40, the chemical polishing tank 50, and the cleaning tank 60, the telescopic drive component 205 is activated, causing the material-carrying expansion shaft 206 to switch from a horizontal state to a vertically downward state. This allows the bearing retainer on the material-carrying expansion shaft 206 to extend into the corresponding polishing tank for processing, until it is finally cleaned in the cleaning tank 60. Then, it rotates back to the unloading station. At this time, the material-carrying expansion shaft 206 is in a vertical state, and current is passed into the second electromagnet 211, causing the material-carrying expansion shaft 206 to release the tension and fixing effect on the bearing retainer. Subsequently, the bearing retainer will fall and be retracted under its own gravity. Example 2

[0030] This embodiment 2 discloses an ultra-precision polishing machine for bearing retainers that is further optimized and improved based on the technical solution in embodiment 1. The similarities between this machine and embodiment 1 will not be described again.

[0031] Reference Appendix Figure 2 and attached Figure 7 In this embodiment 2, an intermediate rinsing device 70 is also provided between the magnetic polishing tank 40 and the chemical polishing tank 50, so that the material carrier shaft 206 and the bearing retainer after vibration and magnetic polishing are rinsed clean by the intermediate rinsing device 70 before chemical polishing, so as to avoid impurities being carried into the chemical polishing tank 50 and causing pollution.

[0032] The specific intermediate rinsing device 70 includes a liquid collection tank 701 located directly below the rotational path of the material-carrying expansion shaft 206. Two mirror-symmetrical semi-cylindrical covers 702 are arranged at the radially inner and outer ends of the liquid collection tank 701. A push cylinder 703 is also provided on the liquid collection tank 701 to drive the two semi-cylindrical covers 702 closer together or further apart. By pushing the cylinder 703, the two semi-cylindrical covers 702 can be closed together to form a sealed cylindrical cavity, within which the vertically positioned material-carrying expansion shaft 206 carries the bearing retainer. A spray pipe 704 is provided on the outer side of each of the two semi-cylindrical covers 702. Both spray pipes 704 are connected to a water pump and an external water source (not shown in the figure) via pipes, and each spray pipe 704 has a row of spray nozzles 705 extending into the interior of the semi-cylindrical cover 702.

[0033] In this embodiment 2, through the structural design of the intermediate rinsing device 70, when the bearing retainer, after vibration polishing and magnetic polishing, moves with the material-carrying expansion shaft 206 to the center of the line connecting the two semi-cylindrical covers 702, the push cylinder 703 is activated to close the two semi-cylindrical covers 702, thereby enclosing the material-carrying expansion shaft 206 within it. Then, the water pump is activated, and rinsing liquid is sprayed onto the bearing retainer on the material-carrying expansion shaft 206 through the spray pipe 704 and the spray nozzle 705, thereby cleaning the material-carrying expansion shaft 206 and the bearing retainer before they enter the chemical polishing tank 50 for chemical polishing treatment.

[0034] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bearing retainer ultra-precision polishing machine, comprising a feeding unit, characterized in that, One end of the feeding unit is connected to the material-carrying rotating unit, and a vibration polishing tank, a magnetic polishing tank, a chemical polishing tank and a cleaning tank are arranged sequentially around the material-carrying rotating unit. The material-carrying rotating unit base and column, the upper end of the column is provided with a synchronously rotating rotating table and a carrier plate, and the column is provided with a power component to drive the rotating table and the carrier plate to rotate. The carrier plate is circumferentially provided with a plurality of material-carrying expansion shafts for mounting bearing retainers, and each material-carrying expansion shaft is connected to a telescopic drive component on the rotating table, so that the material-carrying expansion shaft can switch between a horizontal and a vertically downward state. The feeding unit is connected to the horizontally positioned material-carrying expansion shaft to complete the feeding. The vibratory polishing tank, magnetic polishing tank, chemical polishing tank, and cleaning tank are respectively connected to the vertically downward-positioned material-carrying expansion shaft to perform corresponding polishing and cleaning treatments on the bearing retainer.

2. The ultra-precision polishing machine for bearing retainers according to claim 1, characterized in that, The material-carrying expansion shaft includes a hollow shaft, a plurality of tensioning key bars radially arranged on the hollow shaft, and a pressing rod axially arranged inside the hollow shaft. One end of the pressing rod extends out of the end of the hollow shaft and is connected to a magnetic end block. A spring is arranged between the magnetic end block and the end of the hollow shaft. Elastic rings are sleeved on the plurality of tensioning key bars, and the radial inner end of the tensioning key bars is provided with a slanted groove. An inclined pressing block that interacts with the slanted groove is provided on the pressing rod located inside the hollow shaft.

3. The ultra-precision polishing machine for bearing retainers according to claim 2, characterized in that, A first frame and a second frame are provided on the column extending above the carrier plate. The first frame is provided with a first electromagnet that is radially aligned with the magnetic end block on the loading expansion shaft in the horizontal state at the loading station. The first frame is provided with a second electromagnet that is vertically aligned with the magnetic end block on the loading expansion shaft in the vertical state at the unloading station.

4. The ultra-precision polishing machine for bearing retainers according to claim 3, characterized in that, The outer edge of the carrier plate is provided with a plurality of rotating connecting seats in a ring array, and a notch is provided at the lower end of the rotating connecting seats. The hollow shaft is rotatably installed in the rotating connecting seats, and a groove plate connected to the telescopic drive component is provided at the lower end of the hollow shaft.

5. The ultra-precision polishing machine for bearing retainers according to claim 1, characterized in that, An intermediate rinsing device is provided between the magnetic polishing tank and the chemical polishing tank. The intermediate rinsing device includes a liquid collection tank, two semi-cylindrical covers that can be opened and closed in the liquid collection tank, a push cylinder for driving the semi-cylindrical covers to open and close, and a spray assembly provided inside the semi-cylindrical covers.

6. The ultra-precision polishing machine for bearing retainers according to claim 5, characterized in that, The spray assembly includes a spray pipe and multiple spray nozzles disposed on the spray pipe. The spray pipe is connected to an external water source through a pipe and a water pump.

7. The ultra-precision polishing machine for bearing retainers according to claim 1, characterized in that, The feeding unit includes a conveyor belt assembly, and the conveying direction of the conveyor belt assembly is axially aligned with the horizontally positioned material-carrying expansion shaft at the feeding station. The outer surface of the conveyor belt of the conveyor belt assembly is provided with multiple positioning slots at equal intervals for positioning and conveying the bearing retainer.

8. The ultra-precision polishing machine for bearing retainers according to claim 1, characterized in that, The power assembly includes a power motor, a gear is mounted on the motor shaft of the power motor, and a gear ring that meshes with the gear is mounted on the rotating platform.

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