A non-contact optical fiber polishing device and its polishing process

Abstract

This invention relates to the field of optical fiber end-face processing technology, and discloses a non-contact optical fiber polishing device and its polishing process, including a polishing machine, a polishing disc, and a clamping disc for holding the optical fiber. Multiple pressure-applying components arranged in a circular array are provided, each of which can independently adjust the pressure applied to various points on the clamping disc via a rotating disc to precisely correct its flatness; a polishing range adjustment mechanism is provided, which can conveniently change the rotation range of the polishing disc to adapt to different workpieces by repositioning the connecting shaft on a sliding bar with multiple limiting holes; and a sandpaper quick-locking component is provided, which allows for quick disassembly and locking of the sandpaper by operating a lever. Through the above structure, this invention significantly improves polishing quality and consistency, enhances the processing flexibility and versatility of the device, and improves operational convenience and overall work efficiency.

Description

Technical Field

[0001] This invention relates to the field of optical fiber end-face processing technology, specifically to a non-contact optical fiber polishing device and its polishing process. Background Technology

[0002] In modern fiber optic communication systems, non-contact fiber optic connectors are increasingly used to achieve high-density, low-loss optical path connections. The core of these connectors lies in the precise installation of optical elements such as microlens arrays on the fiber end face, allowing the light beam to diverge and then refocus during transmission, thereby significantly reducing the connection's sensitivity to minute defects such as dust and contaminants. Achieving this requires ultra-high precision grinding and polishing of the ferrule end face to create an atomically flat reference plane, providing a perfect foundation for the subsequent mounting of optical components.

[0003] In current fiber optic polishing practices, the polishing equipment used still suffers from some inherent technical shortcomings when facing increasingly stringent requirements for precision and efficiency. Firstly, many traditional polishing devices employ an integral or centrally pressurized mechanical structure when applying pressure. However, when the clamping disk supporting the fiber itself has slight deformation, or when manufacturing tolerances cause inconsistencies in fiber height across the disk, the applied pressure cannot be evenly distributed across each fiber. This directly leads to inconsistent polishing rates, resulting in some fibers being over-polished while others are under-polished, ultimately affecting the end-face flatness and coplanarity of the entire array and reducing product yield.

[0004] Secondly, the mechanical transmission systems of existing polishing devices typically have fixed motion trajectories, meaning their polishing range is unchanging. This results in poor adaptability when processing fixtures of different specifications or with different numbers of optical fibers. For example, when switching from a fixture for polishing 12-core fibers to one for polishing 24-core fibers, the fixed polishing path cannot evenly cover all fibers, thus affecting the processing results. Adjusting the polishing range often requires complex disassembly and reassembly of mechanical components, a time-consuming and labor-intensive process that reduces production flexibility and equipment utilization.

[0005] Furthermore, the precision grinding of fiber optic end faces is typically a multi-step process that requires the sequential use of sandpaper with varying grits, from coarse to fine. In existing technologies, changing the sandpaper is often cumbersome, requiring tasks such as peeling off old sandpaper with adhesive backing or using tools to loosen multiple screws to disassemble the pressure plate. This time-consuming consumable replacement process consumes a significant amount of non-productive auxiliary time in multi-step processes that require frequent sandpaper changes, thus hindering overall work efficiency. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a non-contact optical fiber polishing device and its polishing process, which solves the problems of poor polishing quality consistency due to uneven polishing pressure, insufficient flexibility due to fixed processing range, and low work efficiency due to cumbersome replacement of polishing consumables in existing technologies.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a non-contact optical fiber polishing device and its polishing process, comprising a polishing machine, an operating component on one side of the polishing machine, a limiting disk fixedly connected to the top of the polishing machine, a driving component at the bottom of the limiting disk, a grinding disk slidably connected to the top of the limiting disk, a sliding strip fixedly connected to the bottom of the grinding disk, a plurality of limiting holes opened inside the sliding strip, a connecting shaft slidably connected to the outer wall of the sliding strip, a plurality of fixing strips slidably connected to the top of the connecting shaft, and a fixing component provided at one end of each fixing strip;

[0008] The grinding disc has multiple locking components inside. A buffer pad is slidably connected to the top of the grinding disc. Sandpaper is fixedly connected to the top of the buffer pad. Multiple embedding grooves and locking grooves are opened at the bottom of the buffer pad. A clamping plate is provided on the top of the limiting plate. Multiple fixing clamps are fixedly connected inside the clamping plate. Multiple support columns are fixedly connected to the top of the grinding machine. Each support column is provided with a pressure component on its top.

[0009] Preferably, the drive assembly includes a rotating shaft and a drive motor. The outer wall of the rotating shaft is rotatably connected to the limiting plate and the inside of the grinding machine. The outer wall of the drive motor is fixedly connected to the inside of the grinding machine. The output end of the drive motor is fixedly connected to the bottom end of the rotating shaft.

[0010] Preferably, each of the fixing components includes two fixing pins and multiple springs, each fixing bar has a lever groove at one end, the outer wall of each fixing pin is slidably connected to the inside of one end of the fixing bar, the outer wall of each fixing pin is fixedly connected to a limit plate, each spring is disposed on one side of the fixing pin, one end of each spring is fixedly connected to one side of the fixing pin, and the other end of each spring is fixedly connected to the inside of the fixing bar.

[0011] Preferably, each of the locking components includes an actuating plate and a limiting block. The grinding disc has multiple sliding grooves inside. The top of the actuating plate is slidably connected to the bottom of the grinding disc. A connecting block is fixedly connected to the top of the actuating plate. The bottom of the limiting block is fixedly connected to the top of the connecting block.

[0012] Preferably, each of the pressurizing components includes a rotating column, a threaded column, and a pressurizing block. The bottom end of the rotating column is rotatably connected to the top of the support column, and a rotating shaft is fixedly connected to the bottom of the rotating column. The outer wall of the threaded column is rotatably connected to the inside of the rotating column, and a rotating disk is fixedly connected to the top of the threaded column. The inner wall of the pressurizing block is threadedly connected to the outer wall of the threaded column.

[0013] Preferably, the support columns are arranged in a circular array on the top of the grinding machine, and the four corners of the clamping disk are slidably connected to the inside of the support columns.

[0014] Preferably, the fixing pins are arranged in a symmetrical array inside the fixing strip, and the outer wall of each limiting plate is slidably connected to the inside of the fixing strip.

[0015] Preferably, the outer wall of the connecting block is slidably connected to the inside of the sliding groove, the bottom of the limiting block is slidably connected to the top of the grinding disc, and the outer wall of the limiting block is slidably connected to the inside of the embedding groove and the locking groove.

[0016] Preferably, the outer wall of the rotating shaft is rotatably connected to the inside of the support column, and the outer wall of the pressure block is slidably connected to the inside of the rotating column.

[0017] A non-contact optical fiber polishing process, characterized by comprising the following steps:

[0018] S1. Preparation steps: Clean the fiber optic ferrule and clamp the fiber optic ferrule into the fixing clamp of the clamping plate;

[0019] S2. Rough grinding step: Install sandpaper on the grinding disc, place the clamping disc on the grinding machine, apply pressure to the clamping disc through the pressure component, and start the grinding machine to grind the end face of the insert to establish a preliminary reference plane.

[0020] S3. Fine grinding step: Operate the locking component on the grinding disc to replace the sandpaper with a second diamond grinding disc with a smaller grit, and grind the end face of the insert again to eliminate the scratches generated in the coarse grinding step.

[0021] S4. Final polishing step: Operate the locking assembly again, replace the second diamond grinding disc with a polishing pad, use polishing liquid containing nano-sized abrasives, and control the pressure applied to the clamping plate by independently adjusting the rotating disks on each of the pressurizing components to polish the end face of the ferrule to obtain a mirror effect.

[0022] S5. Cleaning step: Remove the clamping disc from the grinding machine and clean the polished insert to remove polishing liquid residue from the surface.

[0023] This invention provides a non-contact optical fiber polishing device and its polishing process. It has the following beneficial effects:

[0024] 1. This invention, by designing a sliding strip with multiple limiting holes at the bottom of the grinding disc, and in conjunction with a connecting shaft and fixing components, enables convenient adjustment of the grinding range, enhancing the processing flexibility and adaptability of the device. When it is necessary to change the clamping disc of different sizes or with different numbers of optical fibers, the operator does not need complicated tools or disassembly; simply by inserting and positioning, the position of the connecting shaft in the limiting holes can be changed, thereby adjusting the rotation range of the grinding disc. This allows the grinding path to match different processing requirements, improving the versatility of the equipment.

[0025] 2. This invention, by incorporating multiple locking components inside the grinding disc, enables rapid replacement of sandpaper, improving operational convenience and work efficiency. When it is necessary to change to sandpaper of different grits or when worn sandpaper is needed, the operator only needs to move the lever plate to quickly unlock and remove the old sandpaper via the limit block, then insert the new sandpaper and reverse the operation to lock it. This significantly shortens the auxiliary time for changing consumables in multi-step grinding processes and reduces operational difficulty.

[0026] 3. This invention improves the quality and consistency of grinding by using independently adjustable pressure components arranged in a circular array. During the grinding process, if the fixture disk becomes uneven, the operator can rotate the rotating disk on each pressure component to fine-tune the pressure applied to different positions on the fixture disk, thereby actively correcting its flatness. This ensures that all optical fibers are ground under uniform pressure, avoiding differences in grinding results caused by uneven force, and ultimately obtaining an optical end face with extremely high flatness. Attached Figure Description

[0027] Figure 1 This is a perspective view of the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of the grinding machine of the present invention;

[0029] Figure 3 This is a schematic diagram of the internal structure of the grinding disc of the present invention;

[0030] Figure 4 for Figure 3 A magnified view of the structure at point A in the middle;

[0031] Figure 5 This is a schematic diagram of the exploded structure of the sandpaper of the present invention;

[0032] Figure 6 for Figure 5 A magnified schematic diagram of the structure at point B in the middle;

[0033] Figure 7 for Figure 5 A magnified schematic diagram of the structure at point C in the middle;

[0034] Figure 8 This is a schematic diagram of the exploded structure of the clamping disk of the present invention;

[0035] Figure 9 for Figure 8 A magnified schematic diagram of the structure at point D.

[0036] The components are as follows: 1. Grinding machine; 2. Button; 3. Switch; 4. Display screen; 5. Limiting plate; 6. Rotating shaft; 7. Drive motor; 8. Grinding disc; 9. Sliding strip; 10. Limiting hole; 11. Connecting shaft; 12. Fixing strip; 13. Actuating groove; 14. Fixing pin; 15. Limiting plate; 16. Spring; 17. Sliding groove; 18. Actuating plate; 19. Connecting block; 20. Limiting block; 21. Buffer pad; 22. Sandpaper; 23. Embedded groove; 24. Locking groove; 25. Clamping disc; 26. Fixing clamp; 27. Support column; 28. Rotating column; 29. ​​Rotating shaft; 30. Threaded column; 31. Rotating disc; 32. Pressure block. Detailed Implementation

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see the appendix Figure 1 and attached Figure 2 This invention provides a non-contact optical fiber polishing device and polishing process, including a polishing machine 1. An operating component is provided on one side of the polishing machine 1. A limiting disk 5 is fixedly connected to the top of the polishing machine 1. A driving component is provided at the bottom of the limiting disk 5. A polishing disk 8 is slidably connected to the top of the limiting disk 5. A sliding strip 9 is fixedly connected to the bottom of the polishing disk 8. Multiple limiting holes 10 are opened inside the sliding strip 9. A connecting shaft 11 is slidably connected to the outer wall of the sliding strip 9. Multiple fixing strips 12 are slidably connected to the top of the connecting shaft 11. A fixing component is provided at one end of each fixing strip 12.

[0039] The grinding disc 8 has multiple locking components inside. A buffer pad 21 is slidably connected to the top of the grinding disc 8. Sandpaper 22 is fixedly connected to the top of the buffer pad 21. Multiple embedding grooves 23 and multiple locking grooves 24 are opened at the bottom of the buffer pad 21. A clamping disc 25 is provided on the top of the limiting disc 5. Multiple fixing clamps 26 are fixedly connected inside the clamping disc 25. Multiple support columns 27 are fixedly connected to the top of the grinding machine 1. Each support column 27 is provided with a pressure component on its top.

[0040] The drive assembly includes a rotating shaft 6 and a drive motor 7. The outer wall of the rotating shaft 6 is rotatably connected to the limit plate 5 and the inside of the grinding machine 1. The outer wall of the drive motor 7 is fixedly connected to the inside of the grinding machine 1. The output end of the drive motor 7 is fixedly connected to the bottom end of the rotating shaft 6. The support columns 27 are arranged in a ring array on the top of the grinding machine 1. The four corners of the clamping plate 25 are slidably connected to the inside of the support columns 27.

[0041] Specifically, first, the operator takes out a brand new piece of sandpaper 22 and embeds it into the grinding disc 8, ensuring a tight fit. Next, the optical fibers to be ground are loaded into the fixing clamps 26 on the clamping disc 25. Then, the clamping disc 25 is placed between the four support columns 27 and gently pushed so that its four corners slide into the support columns 27. Next, the operator holds one of the pressure components and rotates it inward. As the rotating pressure block 32 begins to descend, its end face finally contacts and presses against the top of the clamping disc 25, applying pressure. Once everything is ready, the operator presses the switch 3 on one side of the grinder 1, and the entire grinder 1 is powered on and activated. Immediately afterwards, the operator presses button 2, and the drive motor 7 begins to rotate the grinding disc 8, starting the grinding work on the optical fibers.

[0042] Please see the appendix Figure 3 and attached Figure 4 Each fixing component includes two fixing pins 14 and multiple springs 16. Each fixing bar 12 has a lever groove 13 at one end. The outer wall of each fixing pin 14 is slidably connected to the inside of one end of the fixing bar 12. Each fixing pin 14 has a limiting plate 15 fixedly connected to its outer wall. Each spring 16 is located on one side of the fixing pin 14. One end of each spring 16 is fixedly connected to one side of the fixing pin 14, and the other end of each spring 16 is fixedly connected to the inside of the fixing bar 12. The fixing pins 14 are arranged in a symmetrical array inside the fixing bar 12. The outer wall of each limiting plate 15 is slidably connected to the inside of the fixing bar 12.

[0043] Specifically, as production demands change, when a larger clamping disc 25 with more clamps 26 is used to handle larger batches of optical fibers, the operator needs to adjust the rotation range of the grinding disc 8 to match the new workpiece layout. First, lift the entire grinding disc 8 vertically upwards with both hands; the connecting shaft 11 at its bottom will disengage from the central rotating shaft 6. Then, insert your fingers into the lever groove 13 on the fixing strip 12 and apply a pulling force outwards. This causes the fixing pin 14 to retract inwards under pressure, overcoming the resistance of the spring 16, thus unlocking the entire connecting shaft 11 and allowing it to be freely adjusted. At this point, the operator can easily slide the connecting shaft 11 to the preset limit hole 10 position for the new task. After alignment, simply reinsert the fixing strip 12 into the connecting shaft 11; the internal spring 16 will push the fixing pin 14 out again, securing the connecting shaft 11. This completes the adjustment of the rotation range of the grinding disc 8.

[0044] Please see the appendix Figure 5 -Appendix Figure 7 Each locking component includes an actuating plate 18 and a limiting block 20. The grinding disc 8 has multiple sliding grooves 17 inside. The top of the actuating plate 18 is slidably connected to the bottom of the grinding disc 8. A connecting block 19 is fixedly connected to the top of the actuating plate 18. The bottom of the limiting block 20 is fixedly connected to the top of the connecting block 19. The outer wall of the connecting block 19 is slidably connected to the inside of the sliding grooves 17. The bottom of the limiting block 20 is slidably connected to the top of the grinding disc 8. The outer wall of the limiting block 20 is slidably connected to the inside of the embedding groove 23 and the locking groove 24.

[0045] Specifically, after multiple grinding tasks, when the sandpaper 22 becomes damaged due to prolonged use, or when a different grit sandpaper 22 needs to be replaced for finer grinding, the operator simply lifts the grinding disc 8 and pushes the lever 18 inward, causing the limiting block 20 to slide out of the locking groove 24 along a preset track and into the insertion groove 23. After synchronously operating the four levers 18 in sequence, the old sandpaper 22 is unlocked. At this point, simply lift it upward, and as the limiting block 20 completely disengages from the insertion groove 23, the sandpaper 22 is removed. Then, take out a new piece of sandpaper 22 and place its bottom buffer pad 21 into the grinding disc 8. Finally, reverse the levers 18 to return the limiting block 20 to its original position, locking the new sandpaper 22, thus completing the replacement of the sandpaper 22.

[0046] Please see the appendix Figure 8 and attached Figure 9Each pressurizing component includes a rotating column 28, a threaded column 30, and a pressurizing block 32. The bottom end of the rotating column 28 is rotatably connected to the top of the support column 27. A rotating shaft 29 is fixedly connected to the bottom of the rotating column 28. The outer wall of the threaded column 30 is rotatably connected to the inside of the rotating column 28. A rotating disk 31 is fixedly connected to the top of the threaded column 30. The inner wall of the pressurizing block 32 is threadedly connected to the outer wall of the threaded column 30. The outer wall of the rotating shaft 29 is rotatably connected to the inside of the support column 27. The outer wall of the pressurizing block 32 is slidably connected to the inside of the rotating column 28.

[0047] Specifically, when the clamping disc 25 is uneven and needs to be flattened by applying pressure, the operator can hold the rotating disc 31 and rotate it. The rotation causes the threaded column 30 to rotate, thereby driving the pressure block 32 to move downward and apply pressure to the clamping disc 25. By performing the same operation on the rotating discs 31 located at the four corners, each pressure block 32 can apply independent pressure to the clamping disc 25, thus gradually adjusting the clamping disc 25 to a flat state.

[0048] A non-contact optical fiber polishing process, characterized by comprising the following steps:

[0049] S1. Preparation step: Clean the fiber optic ferrule and clamp the fiber optic ferrule into the fixing clamp 26 of the clamping disk 25.

[0050] S2. Rough grinding step: Install sandpaper 22 on the grinding disc 8, place the clamping disc 25 on the grinding machine 1, and apply pressure to the clamping disc 25 through the pressurizing component. Start the grinding machine 1 to grind the end face of the insert to establish a preliminary reference plane.

[0051] S3. Fine grinding step: Operate the locking component on the grinding disc 8 to replace the sandpaper 22 with a second diamond grinding disc with a smaller grit, and grind the end face of the insert again to eliminate the scratches generated in the coarse grinding step.

[0052] S4. Final polishing step: Operate the locking assembly again, replace the second diamond grinding disc with a polishing pad, use polishing liquid containing nano-sized abrasives, and control the pressure applied to the clamping disc 25 by independently adjusting the rotating disc 31 on each of the pressurizing components to polish the end face of the insert to obtain a mirror effect.

[0053] S5. Cleaning step: Remove the clamping plate 25 from the polishing machine 1 and clean the polished insert to remove polishing liquid residue from the surface.

[0054] Specifically, the present invention also provides a non-contact optical fiber polishing process, which is preferably carried out using the aforementioned polishing apparatus. This process aims to obtain an optical end face with a surface roughness at the nanometer level and extremely high flatness, and may specifically include the following steps:

[0055] Before grinding begins, prepare the fiber optic ferrule (e.g., MT ferrule) to be processed. First, clean the ferrule surface with anhydrous ethanol and a lint-free cloth to thoroughly remove oil, dust, and other impurities. Then, precisely clamp the cleaned ferrule into the retaining clip 26 inside the clamping disc 25, ensuring accurate positioning and secure locking.

[0056] Perform a rough grinding step, which aims to perform preliminary planarization of the ferrule end face, quickly remove material, and establish a macroscopic reference plane.

[0057] In practice, the grinding consumables are first installed using the locking assembly on the grinding disc 8. The limiting block 20 is unlocked by moving the lever 18 inward, and then the coarser sandpaper 22 (e.g., 9 microns grit) and the buffer pad 21 are installed on the grinding disc 8, and the lever 18 is moved in the opposite direction to lock them.

[0058] Subsequently, the clamping disc 25 containing the ferrule is placed on the support column 27, and the various pressurizing components are operated. By rotating the rotating disc 31, the pressure block 32 applies a relatively high initial pressure value to the clamping disc 25. The drive motor 7 is started to rotate the grinding disc 8 to grind the end face of the ferrule. After grinding, the end face of the ferrule is macroscopically smooth, but noticeable scratches are visible under a microscope.

[0059] Perform a fine grinding step, which aims to eliminate the deeper scratches left by the previous rough grinding step and further improve the flatness of the end face.

[0060] Stop the equipment, operate the locking assembly on the grinding disc 8 again, quickly remove the sandpaper 22, and replace it with a second diamond grinding disc with a finer grit (e.g., 3 micrometers). Readjust the various pressure components to apply a second pressure value lower than the first pressure value. During this process, deionized water or a special grinding slurry can be added to the grinding interface. Start the equipment to begin the second stage of grinding.

[0061] To achieve higher precision, this step can be repeated. For example, after grinding with a 3-micron grinding disc, the locking mechanism can be used to quickly replace it with a third diamond grinding disc with a finer grit (e.g., 1-micron grit), and the grinding pressure can be further reduced for even finer grinding.

[0062] Perform the final polishing step, which is a crucial step in obtaining the final optical mirror finish, with the goal of completely eliminating all microscopic scratches.

[0063] The diamond grinding disc is replaced with a dedicated polyurethane polishing pad using the quick-change function of the locking assembly. During the grinding process, a polishing slurry containing nano-sized abrasives (such as silica or cerium oxide) is continuously supplied. Simultaneously, a very low third pressure value is applied by finely adjusting the rotating disk 31 of each pressure component, ensuring that this pressure is evenly distributed across the entire clamping disk 25 to correct for any minute flatness deviations. The equipment is then started for final polishing until a flawless mirror finish is achieved, with a surface roughness (Ra) of less than 1 nanometer.

[0064] After performing the cleaning steps and completing all grinding processes, remove the clamping plate 25 from the device. To remove all polishing fluid residue, place the ferrule in an ultrasonic cleaner and thoroughly clean it using deionized water and a specialized cleaning agent. Finally, dry it with high-purity nitrogen to obtain the final product. The finished product can be inspected for quality using a high-magnification microscope and a non-contact 3D optical profilometer.

Claims

1. A non-contact optical fiber polishing device, characterized in that, include: A grinding machine (1) is provided with an operating component on one side. A limiting plate (5) is fixedly connected to the top of the grinding machine (1). A driving component is provided at the bottom of the limiting plate (5). A grinding disc (8) is slidably connected to the top of the limiting plate (5). A sliding strip (9) is fixedly connected to the bottom of the grinding disc (8). Multiple limiting holes (10) are opened inside the sliding strip (9). A connecting shaft (11) is slidably connected to the outer wall of the sliding strip (9). Multiple fixing strips (12) are slidably connected to the top of the connecting shaft (11). A fixing component is provided at one end of each fixing strip (12). Each of the fixing components includes two fixing pins (14) and multiple springs (16). Each fixing bar (12) has a lever groove (13) at one end. The outer wall of each fixing pin (14) is slidably connected to the inside of one end of the fixing bar (12). A limit plate (15) is fixedly connected to the outer wall of each fixing pin (14). Each spring (16) is disposed on one side of the fixing pin (14). One end of each spring (16) is fixedly connected to one side of the fixing pin (14), and the other end of each spring (16) is fixedly connected to the inside of the fixing bar (12). The grinding disc (8) is provided with multiple locking components inside. Each locking component includes a lever plate (18) and a limiting block (20). The grinding disc (8) is provided with multiple sliding grooves (17). The top of the lever plate (18) is slidably connected to the bottom of the grinding disc (8). The top of the lever plate (18) is fixedly connected to a connecting block (19). The bottom of the limiting block (20) is fixedly connected to the top of the connecting block (19). The top of the grinding disc (8) is slidably connected to a buffer pad (21), and the top of the buffer pad (21) is fixedly connected to a sandpaper (22). The bottom of the buffer pad (21) is provided with multiple embedding grooves (23) and multiple locking grooves (24). The outer wall of the connecting block (19) is slidably connected to the inside of the sliding groove (17). The bottom of the limiting block (20) is slidably connected to the top of the grinding disc (8), and the outer wall of the limiting block (20) is slidably connected to the inside of the embedding grooves (23) and the locking grooves (24). The top of the limiting plate (5) is provided with a clamping plate (25), and a plurality of fixing clamps (26) are fixedly connected inside the clamping plate (25). The top of the grinding machine (1) is fixedly connected with a plurality of support columns (27). Each support column (27) is provided with a pressure component at its top. Each pressure component includes a rotating column (28), a threaded column (30), and a pressure block (32). The bottom end of the rotating column (28) is rotatably connected to the top of the support column (27). The bottom of the rotating column (28) is fixedly connected with a rotating shaft (29). The outer wall of the threaded column (30) is rotatably connected to the inside of the rotating column (28). The top end of the threaded column (30) is fixedly connected with a rotating plate (31). The inner wall of the pressure block (32) is threadedly connected to the outer wall of the threaded column (30).

2. The non-contact optical fiber polishing device according to claim 1, characterized in that, The drive assembly includes a rotating shaft (6) and a drive motor (7). The outer wall of the rotating shaft (6) is rotatably connected to the limit plate (5) and the inside of the grinding machine (1). The outer wall of the drive motor (7) is fixedly connected to the inside of the grinding machine (1). The output end of the drive motor (7) is fixedly connected to the bottom end of the rotating shaft (6).

3. The non-contact optical fiber polishing device according to claim 1, characterized in that, The support columns (27) are arranged in a ring array on the top of the grinding machine (1), and the four corners of the clamping disk (25) are slidably connected to the inside of the support columns (27).

4. The non-contact optical fiber polishing device according to claim 3, characterized in that, The fixing pins (14) are arranged in a symmetrical array inside the fixing strip (12), and the outer wall of each limiting plate (15) is slidably connected to the inside of the fixing strip (12).

5. The non-contact optical fiber polishing device according to claim 1, characterized in that, The outer wall of the rotating shaft (29) is rotatably connected to the inside of the support column (27), and the outer wall of the pressure block (32) is slidably connected to the inside of the rotating column (28).

6. A non-contact optical fiber polishing process, characterized in that, A polishing apparatus for a non-contact optical fiber as described in any one of claims 1-5, comprising the following steps: S1. Preparation steps: Clean the fiber optic ferrule and clamp the fiber optic ferrule into the fixing clamp (26) of the clamping disk (25); S2, coarse grinding step: install sandpaper (22) on the grinding disc (8), place the clamping disc (25) on the grinding machine (1), apply pressure to the clamping disc (25) through the pressurizing component, start the grinding machine (1) to grind the end face of the insert to establish a preliminary reference plane; S3. Fine grinding step: Operate the locking component on the grinding disc (8) to replace the sandpaper (22) with a second diamond grinding disc with a smaller grit size, and grind the end face of the insert again to eliminate the scratches generated in the coarse grinding step. S4. Final polishing step: Operate the locking assembly again, replace the second diamond grinding pad with a polishing pad, use a polishing liquid containing nano-sized abrasives, and control the pressure applied to the clamping plate (25) by independently adjusting the rotating disk (31) on each of the pressurizing components to polish the end face of the insert to obtain a mirror effect. S5. Cleaning step: Remove the clamping plate (25) from the polishing machine (1) and clean the polished insert to remove polishing liquid residue from the surface.

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