A fixing clamp for optical fiber bare ferrule grinding

Abstract

The utility model provides a kind of for optical fiber bare ferrule grinding's fixed clamp, including grinding fixture plate, multiple first positioning holes are equipped on it;Partition, setting is above grinding fixture plate, second positioning hole is equipped on partition with first positioning hole corresponding;Pressure plate, setting is above partition, multiple rectangular grooves are opened in pressure plate;Pressing plate, setting is on the rectangular groove of pressure plate, multiple U type slot are opened in pressing plate, U type slot is on the same perpendicular line with second positioning hole;And pressure strip, setting is above pressing plate, by fastener and pressing plate and pressure plate connection.The utility model is through design grinding fixture plate on first positioning hole and the coaxial arrangement of second positioning hole on partition, and using the structure that U type slot on pressing plate and bare ferrule profile adaptation, the accurate positioning and uniform stress mechanism to optical fiber bare ferrule are formed, effectively solve the problem that optical fiber bare ferrule loading and unloading efficiency is low and fixed stability is poor.

Description

Technical Field

[0001] This utility model relates to the field of optical fiber processing, and in particular to a fixing fixture for polishing bare optical fiber ferrules. Background Technology

[0002] The rapid development of fiber optic communication has placed higher demands on the performance of fiber optic connectors, among which the polishing quality of the connector end face is a key factor determining its optical performance. To obtain a qualified polished end face, the bare fiber ferrule needs to be stably and precisely fixed on the polishing equipment. The fixing device used for this purpose is the polishing fixture.

[0003] In existing technologies, fixtures for grinding bare fiber optic ferrule terminals typically employ cavities with internal clamping or snap-fit ​​structures to secure the ferrules. These internal fixing structures present the following technical problems during mass grinding: First, the process of loading and unloading ferrules is cumbersome and inefficient; second, the internal fixing structures (especially plastic clamps) are prone to wear, deformation, or even breakage after repeated contact with ceramic or metal ferrules, resulting in poor fixing stability and affecting the quality and consistency of the ground end face; third, these fixtures require frequent replacement or calibration, increasing maintenance costs; furthermore, the existing fixture structure's mechanism for applying fixing pressure to the ferrule may cause uneven stress on the ferrule during grinding, leading to ferrule deformation and affecting product yield.

[0004] Therefore, there is an urgent need for a grinding fixture structure that can quickly install and remove bare fiber optic ferrules, is durable, provides stable fixation, and is not prone to ferrule deformation. Utility Model Content

[0005] The technical problem to be solved by this utility model is: to provide a fixing fixture for polishing bare fiber ferrules that is simple in structure, quick to install and remove, stable and reliable in fixing, and durable, in order to address the problems of low loading and unloading efficiency, easy wear of internal structure, poor fixing stability leading to low polishing quality consistency, and high maintenance costs due to frequent replacement or calibration of existing fiber polishing fixtures.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A fixing fixture for polishing bare fiber optic ferrules includes:

[0008] A grinding fixture plate having multiple first positioning holes;

[0009] A partition is provided above the grinding fixture plate, and the partition is provided with a second positioning hole corresponding to the first positioning hole;

[0010] A pressure plate is installed above the partition, and multiple rectangular grooves are formed on the pressure plate;

[0011] A pressure plate is mounted on a rectangular groove in a pressure plate. Multiple U-shaped slots are formed on the pressure plate, and these U-shaped slots are aligned vertically with the second positioning hole.

[0012] Pressure strips are installed above the pressure plate and are connected to the pressure plate and bearing plate by fasteners.

[0013] Preferably, the pressure plate includes a long pressure plate and a short pressure plate, and the rectangular groove includes multiple channels of different lengths, with the long pressure plate disposed on the longer channel and the short pressure plate disposed on the shorter channel.

[0014] Preferably, the pressure strip includes a long pressure strip corresponding to the long pressure plate and a short pressure strip corresponding to the short pressure plate.

[0015] Preferably, the pressure plate is provided with a first screw hole, and the grinding fixture plate is provided with a second screw hole corresponding to the first screw hole. A hand screw passes through the first screw hole and connects with the second screw hole to connect the pressure plate and the grinding fixture plate.

[0016] Preferably, the partition plate is provided with a third screw hole, and the grinding fixture plate is provided with a fourth screw hole corresponding to the third screw hole. The countersunk screw passes through the third screw hole and connects with the fourth screw hole to fix the partition plate and the grinding fixture plate.

[0017] Preferably, the pressure strip has a fifth screw hole, the pressure plate has a sixth screw hole, and the bearing plate has a seventh screw hole corresponding to the fifth and sixth screw holes. The flat-head screw passes through the fifth, sixth, and seventh screw holes to connect and fix the pressure strip, pressure plate, and bearing plate.

[0018] Preferably, the first positioning hole on the grinding fixture plate and the second positioning hole on the partition are coaxially arranged.

[0019] Preferably, the shape of the U-shaped slot is adapted to the outline shape of the bare ferrule terminal.

[0020] Preferably, the rectangular groove has four channels, with the length of the two middle channels being greater than the length of the two outer channels.

[0021] The beneficial effects that this utility model can achieve are:

[0022] By designing the first positioning hole on the grinding fixture plate and the second positioning hole on the partition plate to be coaxially set, and adopting a structure in which the U-shaped slot on the pressure plate matches the contour of the bare ferrule, the bare fiber ferrule is fixed in the three clamping mechanisms of the U-shaped slot, the first positioning hole, and the second positioning hole, forming a precise positioning and uniform force mechanism for the bare fiber ferrule. This effectively solves the problems of low loading and unloading efficiency and poor fixing stability of the bare fiber ferrule, and significantly improves the efficiency of batch grinding and the quality consistency of the grinding end face.

[0023] By introducing long and short pressure plates in the pressure plate system and matching them with rectangular grooves of different lengths on the bearing plate, and combining them with pressure plates made of elastic material, uniform pressure can be applied to inserts with slightly different dimensions. This effectively solves the problems of easy wear and tear of the internal structure and high maintenance costs due to frequent replacement, greatly improves the service life and stability of the fixture, and reduces the maintenance costs of long-term use. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the fixing fixture used for polishing bare fiber ferrules in Example 1;

[0025] Figure 2 This is an exploded view of the fixture used for polishing bare fiber ferrules in Example 1;

[0026] Figure 3 This is an exploded view of the structure at the pressure plate and pressure strip in Example 1.

[0027] Reference numerals: 1. Grinding fixture plate; 2. Partition plate; 3. Pressure plate; 4. Pressure plate; 41. Long pressure plate; 42. Short pressure plate; 5. Pressure strip; 51. Long pressure strip; 52. Short pressure strip; 6. First positioning hole; 7. Second positioning hole; 8. Rectangular groove; 9. First screw hole; 10. Second screw hole; 11. Third screw hole; 12. Fourth screw hole; 13. Fifth screw hole; 14. Sixth screw hole; 15. Seventh screw hole; 16. Countersunk screw; 17. Hand screw; 18. Flat head screw; 19. Bare fiber optic ferrule; 20. Grinding machine; 21. U-shaped slot. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments, but these specific embodiments do not limit the scope of protection of the present invention in any way. Example

[0029] like Figure 1-3 As shown, a fixing fixture for polishing bare fiber ferrules is provided. This fixing fixture aims to solve the technical problems of existing fiber polishing fixtures, such as low loading and unloading efficiency, easy wear of internal structure, poor fixing stability leading to low polishing quality consistency, and high maintenance costs due to frequent replacement or calibration.

[0030] The fixture for polishing bare fiber ferrules includes a polishing fixture plate 1, a partition plate 2 disposed on the polishing fixture plate 1, a pressure plate 3 disposed above the partition plate 2, a pressure plate 4 disposed on a rectangular groove 8 of the pressure plate 3, and a pressure strip 5 disposed above the pressure plate 4.

[0031] Specifically, the grinding fixture plate 1 is the supporting base of the entire grinding fixture, providing a stable platform and docking with the grinding machine 20. The grinding fixture plate 1 is provided with multiple first positioning holes 6 for placing and positioning the bare fiber optic ferrule 19.

[0032] A partition 2 is positioned above the polishing fixture plate 1, and the partition 2 has second positioning holes 7 corresponding to the first positioning holes 6 on the polishing fixture plate 1. These positioning holes are arranged in an array, and their number and spacing are determined according to the quantity and model of the bare fiber ferrules 19 to be polished in a single batch. For example, they can be arranged in a matrix form such as 8×8 or 16×4. The partition 2 has a third screw hole 11, and the polishing fixture plate 1 has a fourth screw hole 12 corresponding to the third screw hole 11. Countersunk screws 16 pass through the third screw hole 11 and connect to the fourth screw hole 12 to fix the partition 2 to the polishing fixture plate 1.

[0033] A pressure plate 3 is provided above the partition 2. The pressure plate 3 has multiple rectangular grooves 8, a total of four, with the length of the two middle grooves being greater than that of the two outer grooves. The pressure plate 3 has a first screw hole 9, and the grinding fixture plate 1 has a second screw hole 10 corresponding to the first screw hole 9. A hand screw 17 passes through the first screw hole 9 and connects to the second screw hole 10, thus connecting the pressure plate 3 and the grinding fixture plate 1.

[0034] The pressure plate 4 is mounted on the rectangular groove 8 of the pressure plate 3. Multiple U-shaped slots 21 are formed on the pressure plate 4, and these slots 21 are aligned vertically with the second positioning holes 7 on the partition plate 2. The shape of the U-shaped slots 21 matches the contour of the bare ferrule 19 terminal, enabling precise positioning of the ferrule. Due to the open structure of the U-shaped slots 21, the bare fiber optic ferrule 19 can be easily and quickly inserted directly into the slot without the need for complex clamps or internal holding mechanisms.

[0035] The pressure plate 4 includes a long pressure plate 41 and a short pressure plate 42. The long pressure plate 41 is disposed on the longer rectangular slot 8, and the short pressure plate 42 is disposed on the shorter rectangular slot 8. The pressure plate 4 is preferably made of spring steel. Spring steel has good elasticity and strength. When pressure is applied by fasteners, the pressure plate 4 will produce a certain elastic deformation, thereby applying a relatively uniform and appropriate downward pressure to each bare optical fiber ferrule 19 located below it.

[0036] The pressure strip 5 is positioned above the pressure plate 4, including a long pressure strip 51 corresponding to the long pressure plate 41 and a short pressure strip 52 corresponding to the short pressure plate 42. The pressure strip 5 has a fifth screw hole 13, the pressure plate 4 has a sixth screw hole 14, and the bearing plate 3 has a seventh screw hole 15 corresponding to the fifth screw hole 13 and the sixth screw hole 14. Flat-head screws 18 pass through the fifth screw hole 13, the sixth screw hole 14, and the seventh screw hole 15 to connect and fix the pressure strip 5, the pressure plate 4, and the bearing plate 3.

[0037] The U-shaped slot 21 and the first positioning hole 6 on the grinding fixture plate 1 are coaxially set with the second positioning hole 7 on the partition plate 2 to ensure that the bare fiber optic ferrule 19 can be accurately positioned.

[0038] The working principle and method of the fixing fixture used for polishing bare fiber optic ferrules in this embodiment are described as follows:

[0039] When using the fiber optic bare ferrule 19 polishing fixture for polishing, first, the polishing fixture plate 1 is mounted on the polishing machine 20 platform. Then, the partition plate 2 is fixed to the polishing fixture plate 1 using countersunk screws 16, which pass through the third screw hole 11 of the partition plate 2 and connect to the fourth screw hole 12 of the polishing fixture plate 1. Next, the pressure plate 3 is fixed to the polishing fixture plate 1 using hand-tightening screws 17, which pass through the first screw hole 9 of the pressure plate 3 and connect to the second screw hole 10 of the polishing fixture plate 1.

[0040] Next, the pressure plate 4 (including the long pressure plate 41 and the short pressure plate 42) is placed on the rectangular groove 8 of the pressure plate 3, so that the U-shaped slot 21 on the pressure plate 4 is on the same vertical line as the second positioning hole 7 on the partition plate 2, and the U-shaped slot 21 is adapted to the contour shape of the bare ferrule 19 terminal. Then, the pressure strip 5 (including the long pressure strip 51 and the short pressure strip 52) is installed above the corresponding pressure plate 4.

[0041] Then, use a flathead screw 18 to pass through the fifth screw hole 13 on the pressure strip 5 and the sixth screw hole 14 on the pressure plate 4, and screw it into the seventh screw hole 15 on the pressure plate 3. Tighten the flathead screw 18 evenly until you feel that the pressure strip 5 and the pressure plate 4 have applied sufficient rebound force to the screw (indicating that the pressure plate 4 has applied a stable clamping force to the insert below it).

[0042] Take out the bare fiber ferrule 19 to be polished (which has undergone fiber stripping, glue filling, curing and breaking processes, exposing the end face to be polished). Place the terminals of the bare fiber ferrule 19 into the U-shaped slot 21, the corresponding second positioning hole 7 on the partition plate 2 and the first positioning hole 6 on the polishing fixture plate 1 in sequence. Since these positioning holes are coaxially set, the accurate positioning of the ferrule can be ensured.

[0043] After the bare fiber optic ferrule 19 is fixed, the polishing machine 20 is started and the terminal end face of the bare fiber optic ferrule 19 in the fixture is polished in batches according to the preset polishing program. During the entire polishing process, the fixture structure remains stable to ensure that the end face of the ferrule and the polishing disc maintain precise angular and pressure contact. Since the ferrule is fixed stably and without stress, the polished end face has high quality and good consistency.

[0044] After grinding, the ground fiber optic bare ferrule 19 is removed from the positioning hole. Compared with the prior art, the fiber optic bare ferrule 19 grinding fixture structure disclosed in this embodiment, through the use of positioning holes and pressure plates 4 (especially spring steel pressure plates 4) for fixing, achieves rapid clamping and disassembly of the bare ferrule 19, improving the efficiency of batch grinding. At the same time, this structure avoids easily worn plastic claws and other components in traditional fixtures, significantly improving the durability of the fixture, reducing maintenance and replacement costs caused by fixture wear, and ensuring long-term stability. The application of spring steel pressure plates 4 further solves the problem of ferrule deformation during the fixing process, ensuring the consistency and high quality of the ground end face.

[0045] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any innovative improvements or substitutions based on this utility model should fall within the scope of the claims of this utility model. Furthermore, the parameters, materials, and processes mentioned in the above embodiments are not unique. Without departing from the technical essence of this utility model, those skilled in the art can make various alternatives, and these alternative solutions should also be considered to fall within the scope of protection of this utility model.

Claims

1. A fixing fixture for polishing bare optical fiber ferrules, characterized in that, include: A grinding fixture plate having multiple first positioning holes; A partition is provided above the grinding fixture plate, and the partition is provided with a second positioning hole corresponding to the first positioning hole; A pressure plate is installed above the partition, and multiple rectangular grooves are formed on the pressure plate; A pressure plate is mounted on a rectangular groove in a pressure plate. Multiple U-shaped slots are formed on the pressure plate, and these U-shaped slots are aligned vertically with the second positioning hole. Pressure strips are installed above the pressure plate and are connected to the pressure plate and bearing plate by fasteners.

2. The fixing clamp according to claim 1, characterized in that, The pressure plate includes a long pressure plate and a short pressure plate. The rectangular groove includes multiple channels of different lengths. The long pressure plate is set on the longer channel, and the short pressure plate is set on the shorter channel.

3. The fixing clamp according to claim 2, characterized in that, The pressure strip includes a long pressure strip corresponding to the long pressure plate and a short pressure strip corresponding to the short pressure plate.

4. The fixing clamp according to claim 1, characterized in that, The pressure plate is provided with a first screw hole, and the grinding fixture plate is provided with a second screw hole corresponding to the first screw hole. A hand screw passes through the first screw hole and connects with the second screw hole to connect the pressure plate and the grinding fixture plate.

5. The fixing clamp according to claim 1, characterized in that, The partition plate is provided with a third screw hole, and the grinding fixture plate is provided with a fourth screw hole corresponding to the third screw hole. The countersunk screw passes through the third screw hole and connects with the fourth screw hole to fix the partition plate and the grinding fixture plate.

6. The fixture clamp of claim 1, wherein, The pressure strip has a fifth screw hole, the pressure plate has a sixth screw hole, and the bearing plate has a seventh screw hole corresponding to the fifth and sixth screw holes. The flat-head screw passes through the fifth, sixth and seventh screw holes to connect and fix the pressure strip, pressure plate and bearing plate.

7. The fixing clamp according to claim 1, characterized in that, The first positioning hole on the grinding fixture plate and the second positioning hole on the partition plate are coaxially arranged.

8. The fixing clamp according to claim 1, characterized in that, The shape of the U-shaped slot is adapted to the outline shape of the bare ferrule terminal.

9. The fixing clamp according to any one of claims 1-8, characterized in that, The rectangular groove has four sections, with the two middle sections being longer than the two outer sections.

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