A zero-loss multi-core fiber ferrule grinding process and grinding equipment

Abstract

The application discloses a zero-loss multi-core optical fiber ferrule grinding process and a grinding equipment. The grinding process comprises the following steps: ferrule loading, glue removal and grinding, cleaning, fine grinding, precision grinding, super-precision grinding, polishing and inspection. Different grinding sheets and grinding liquids are used in each grinding step. The application divides the process into multi-section grinding, cooperates with multiple grinding machines for parallel operation, shortens the production cycle and improves the overall production efficiency. Multiple small clamps are installed on a large clamp for grinding together, which can well adapt to the grinding requirements of different core number ferrules and guarantee the consistency and high quality of multi-core ferrule grinding.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical fiber grinding, in particular to a zero-loss multi-core optical fiber ferrule grinding process and a grinding device. BACKGROUND

[0002] In the field of optical fiber communication applications, with the rapid iteration of communication technology and the continuous emergence of high-end application demands (such as the large-scale deployment of data centers, the continuous upgrading of high-computing scenarios, and the deep application of intelligent control systems), MPO (Multi-fiber Push On, multi-core push-on) connectors have become the core connection solution in key scenarios such as data centers due to their core advantage of high-density integration. The core component of the MPO connector is the MT ferrule, and the grinding quality and optical performance (such as the radius of curvature, the height difference of the optical fiber, the inclination angle, etc.) of the end face directly affect the insertion loss and return loss of optical signal transmission.

[0003] However, the existing ferrule grinding technology has many problems:

[0004] 1. Poor grinding quality and consistency: In current mainstream grinding equipment, the ferrules are arranged in a circular manner, the grinding track range is small and easy to produce cross interference, resulting in low curvature radius, large eccentricity, poor height consistency of the optical fiber end face, insufficient angle control precision, and ultimately low optical performance qualification rate of the product.

[0005] 2. Poor process adaptability: The existing grinding process cannot adapt to the differentiated grinding needs of different optical fiber core numbers (such as 12 cores, 16 cores, and 24 cores), and the more cores, the higher the technical requirements for grinding, and the existing process cannot guarantee consistency.

[0006] Therefore, there is an urgent need for a new grinding process and equipment to solve the above problems and achieve high-performance, high-efficiency, and low-cost ferrule production. SUMMARY

[0007] In order to solve some or all of the problems existing in the prior art, on the one hand, the present application provides a zero-loss multi-core optical fiber ferrule grinding process, comprising the following steps:

[0008] S1: loading ferrules, fixing and installing a plurality of ferrules on each small clamp, and fixing and installing all small clamps on a large clamp, and then fixing and installing the large clamp on the grinding equipment, so that the end face of the ferrule faces the grinding platform of the grinding equipment;

[0009] S2: degumming and grinding, first install D30 grinding sheet on the grinding platform and control the grinding equipment to grind the ferrule and the optical fiber in the ferrule, then install SC16 grinding sheet on the grinding platform and control the grinding equipment to grind the ferrule and the optical fiber in the ferrule, and pure water is used to clean the intersection between the small clamp and the grinding sheet during and after the two grinding processes;

[0010] S3: cleaning, remove the large clamp from the grinding equipment, and remove the degummed ferrule from each small clamp, then perform ultrasonic water washing and blow drying on the ferrule, and then execute step S1;

[0011] S4: fine grinding, first install D3 grinding sheet on the grinding platform and control the grinding equipment to grind the ferrule and the optical fiber in the ferrule, then install ADS grinding sheet on the grinding platform and control the grinding equipment to grind the ferrule and the optical fiber in the ferrule, and pure water is used to clean the intersection between the small clamp and the grinding sheet during and after the two grinding processes;

[0012] S5: fine grinding, remove the large clamp, replace the grinding equipment and install the large clamp with the ferrule on the new grinding equipment, install black gasket on the grinding platform, pour A50 grinding liquid on the black gasket, and then control the grinding equipment to grind the ferrule and the optical fiber in the ferrule;

[0013] S6: super-fine grinding, remove the large clamp, replace the grinding equipment and install the large clamp with the ferrule on the new grinding equipment, install white cotton cloth on the grinding platform, pour G50 grinding liquid on the white cotton cloth, and then control the grinding equipment to grind the ferrule and the optical fiber in the ferrule;

[0014] S7: polishing, remove the large clamp, replace the grinding equipment and install the large clamp with the ferrule on the new grinding equipment, install black gasket on the grinding platform, pour C30 grinding liquid on the black gasket, and then control the grinding equipment to grind the ferrule and the optical fiber in the ferrule, and execute step S3 after polishing is completed;

[0015] S8: inspection, use 3D detection equipment and end face detection equipment to detect the end face of the ferrule.

[0016] As a further improvement of the application, after step S1 and step S3, it is also necessary to use CCD magnifying mirror to check the height of each ferrule protruding small clamp, and it is necessary to ensure that the height of each ferrule protruding small clamp is consistent.

[0017] As a further improvement of the application, before step S4, it also includes a corner cutting step: install SC9 grinding sheet on the grinding platform, set the grinding equipment rotation speed to 60 rpm and the stroke speed to 6 rpm, and then control the grinding equipment to grind the ferrule and the optical fiber in the ferrule for 60 seconds.

[0018] As a further improvement of the present application, in step S2, the parameters of the grinding device are set as follows: the rotation speed of the grinding platform is 50 rpm, the stroke speed is 4-6 rpm, and the time for each grinding is 10 seconds;

[0019] In steps S4 and S6, the parameters of the grinding device are set as follows: the rotation speed of the grinding platform is 250 rpm, and the stroke speed is 6 rpm; in step S4, the time for each grinding is 20 seconds, and in step S6, the time for grinding is 150 seconds.

[0020] In steps S5 and S7, the parameters of the grinding device are set as follows: the rotation speed of the grinding platform is 180 rpm, and the stroke speed is 6 rpm; in step S5, the time for grinding is 50-80 seconds, and in step S7, the time for grinding is 30 seconds.

[0021] As a further improvement of the present application, in step S3, the ferrule with the optical fiber is first placed in the ultrasonic water tank for cleaning for 3 minutes, and then air is blown along the direction of the 45° inclination angle of the ferrule using an air gun until the ferrule is dried.

[0022] As a further improvement of the present application, after each installation of the grinding sheet, black gasket or white flannel, a roller is used for pressing to ensure that it is flat, tightly attached to the grinding platform and free of air bubbles.

[0023] On the other hand, the present application also provides a grinding device for implementing the above grinding process, which comprises a grinding machine body and a large clamp detachably connected with the grinding machine body, the grinding machine body is provided with a control mechanism, a driving mechanism and a grinding platform, the driving mechanism is electrically connected with the control mechanism, and the grinding platform is connected with the output end of the driving mechanism; the grinding machine body is also provided with a locking mechanism, which is detachably connected with the large clamp and used for locking the large clamp above the grinding platform; the large clamp is provided with a plurality of small clamps which are detachable, and the small clamps are provided with installation slots used for installing ferrules.

[0024] As a further improvement of the present application, the large clamp is provided with a wire rack used for storing optical fiber wire bundles, the small clamps are provided with fixing bolts and positioning pins, the fixing bolts are threadedly connected with the large clamp, the large clamp is provided with positioning holes at positions corresponding to the positioning pins, and the positioning pins are inserted into the positioning holes.

[0025] As a further improvement of the present application, the small clamps are provided with fixing screws at positions corresponding to the installation slots, the fixing screws are threadedly connected with the small clamps, one end of the fixing screw can extend into the installation slot, and the fixing screw is used for limiting and fixing the ferrule in the installation slot.

[0026] As a further improvement of the present application, the locking mechanism comprises a locking cylinder and a locking buckle, the locking cylinder is connected with the grinder body, the middle part of the locking buckle is hinged with the grinder body, the output end of the locking cylinder is hinged with one end of the locking buckle, the locking cylinder can push the locking buckle to rotate and swing, thereby driving the locking buckle away from the end of the locking cylinder to abut or separate from the large clamp.

[0027] Compared with the prior art, the present application has the following advantages:

[0028] 1. The present application refines the process into multiple stages, cooperates multiple grinders for parallel operation, shortens the production cycle, and designs a special clamp to support process division, avoids downtime waiting caused by frequent replacement of grinding pads, and improves overall production efficiency.

[0029] 2. Through optimized grinding parameter sequence and clamp design, precise control of end face 3D parameters (curvature radius, fiber height, core concavity, geometric limit, etc.) is realized, the grinding precision is improved, and the qualified rate of optical performance of the final product is guaranteed.

[0030] 3. The present application installs multiple small clamps on the large clamp for grinding together, which can well adapt to the grinding needs of different core numbers (such as 12-core, 16-core, 24-core) ferrules, and ensures the consistency and high quality of multi-core ferrule grinding. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the schemes in the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0032] Figure 1 is the process flow chart of embodiment 1 of the present application;

[0033] Figure 2 is the overall structure schematic diagram of embodiment 2 of the present application;

[0034] Figure 3 is the structure schematic diagram of the large clamp and the small clamp in embodiment 2 of the present application;

[0035] Figure 4 is Figure 3 the cross-sectional structure schematic diagram of A-A in DETAILED DESCRIPTION

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification is for describing particular embodiments only and is not intended to be limiting of the application; the use herein of terms such as "comprise", "comprises" or "comprising" and the like are used in the sense of "including" and / or "comprising" and not by way of "consisting only" or "consisting of"; the use herein of terms such as "first", "second" and "third" and the like, merely designate a different class, a different group, a different structure, a different material, a different step or a different combination, and do not require or imply that the previous, next or subsequent steps or combinations must necessarily occur or be performed in any specific sequence, order, direction, pattern, or arrangement.

[0037] Reference to "an embodiment" or "the embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" or "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily referring to a common or identical embodiment, or an embodiment that is every other embodiment.

[0038] For better understanding of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings.

[0039] Embodiment 1: As shown in the figure, a grinding process of a zero-loss multi-core optical fiber ferrule includes the following steps: Figure 1

[0040] S1: Ferrule installation, a plurality of ferrules are respectively fixed and installed on each small clamp, and all small clamps are fixed and installed on a large clamp, and then the large clamp is fixed and installed on a grinding device, so that the end face of the ferrule faces the grinding platform of the grinding device. After the large clamp is fixed to the grinding device, the height of each ferrule protruding from the small clamp is checked using a CCD magnifying lens, and it is necessary to ensure that the height of each ferrule protruding from the small clamp is consistent.

[0041] S2: Glue removal and grinding, first place a gasket on the grinding platform, and then place a D30 grinding sheet above the gasket, then press the D30 grinding sheet flat against the grinding platform with a roller and without air bubbles, and then control the grinding device to grind the ferrule and the optical fiber in the ferrule, the grinding time is 10 seconds. Then, the large clamp is taken out of the grinding platform and is fixed and installed on another grinding device; and a gasket is placed on the grinding platform of the grinding device, and an SC16 grinding sheet is placed above the gasket, then the SC16 grinding sheet is pressed flat against the grinding platform with a roller and without air bubbles, and then the grinding device is controlled to grind the ferrule and the optical fiber in the ferrule, the grinding time is 10 seconds.

[0042] ​It should be noted that during the above two grinding processes and after the grinding is completed, a water gun is needed to flush pure water into the junction of the small clamp and the grinding sheet to ensure that the residues are flushed away in time and the grinding quality is improved. On the other hand, during the two grinding processes of the adhesive removal grinding, the setting parameters of the grinding equipment are as follows: the rotation speed of the grinding platform is 50 rpm, and the stroke speed is 4-6 rpm.

[0043] In other embodiments, the adhesive removal grinding can also be completed on one grinding equipment. After the first grinding is completed, the grinding sheet is replaced directly on the grinding platform.

[0044] S3: cleaning, after the adhesive removal grinding is completed, the large clamp is taken out of the grinding platform, and each ferrule is taken out of the small clamp; then the ferrules are placed in the ultrasonic water tank for cleaning for 3 minutes, and after cleaning, the air gun is used to blow air along the direction of the 45° inclination angle of the ferrules until the ferrules are dried. Then the ferrules are reinstalled on the small clamp, and the large clamp is installed on the new grinding equipment. After the large clamp is fixed to the grinding equipment, the CCD magnifying glass is used again to check the height of each ferrule protruding from the small clamp, and it is necessary to ensure that the height of each ferrule protruding from the small clamp is consistent.

[0045] The angle is cut, the gasket is placed on the grinding platform first, and the SC9 grinding sheet is placed above the gasket, then the roller is used to press the SC9 grinding sheet to make it flat and tightly adhere to the grinding platform without air bubbles; then the parameters of the grinding equipment are set as follows: the rotation speed of the grinding platform is 60 rpm, and the stroke speed is 6 rpm; after the grinding parameters are set, the grinding equipment is controlled to grind the ferrules and the optical fibers in the ferrules, and the grinding time is 60 seconds.

[0046] In actual work, some ferrules need to be cut at an angle (such as APC type ferrules), and some ferrules do not need to be cut at an angle (such as PC type ferrules), so in actual grinding process, the operator can omit this step according to the actual situation.

[0047] S4: fine grinding, D3 grinding sheet is placed on the grinding platform, and then the roller is used to press the D3 grinding sheet to make it flat and tightly adhere to the grinding platform without air bubbles, and then the grinding equipment is controlled to grind the ferrules and the optical fibers in the ferrules, and the grinding time is 20 seconds. Then replace the grinding sheet, take out the D3 grinding sheet, and place the ADS grinding sheet on the grinding platform, then press the grinding sheet with the roller to make it flat and tightly adhere to the grinding platform without air bubbles, and then control the grinding equipment to grind the ferrules and the optical fibers in the ferrules, and the grinding time is 20 seconds.

[0048] It should be noted that during the above two grinding processes and after the grinding is completed, pure water is sprayed into the intersection between the small clamp and the grinding sheet by using a water gun to ensure that the residues of the grinding are washed away in time and the grinding quality is improved. On the other hand, during the two grinding processes of fine grinding, the setting parameters of the grinding equipment are as follows: the rotation speed of the grinding platform is 250 rpm, and the stroke speed is 6 rpm.

[0049] S5: Fine grinding, the large clamp is removed from the grinding equipment and installed on another grinding equipment, then a gasket is placed on the grinding platform, a black gasket is placed above the gasket, and the black gasket is pressed flat and tightly against the grinding platform without air bubbles by using a roller, then A50 grinding liquid is poured on the black gasket, and the grinding liquid needs to cover the range of the grinding track of the ferrule; then the grinding equipment is controlled to grind the ferrule and the optical fiber in the ferrule, and the grinding time is 50-80 seconds.

[0050] It should be noted that during the fine grinding process and after the grinding is completed, pure water is sprayed into the intersection between the small clamp and the grinding sheet by using a water gun to ensure that the residues of the grinding are washed away in time and the grinding quality is improved. On the other hand, the setting parameters of the grinding equipment during fine grinding are as follows: the rotation speed of the grinding platform is 180 rpm, and the stroke speed is 6 rpm.

[0051] S6: Superfine grinding, the large clamp is removed from the grinding equipment and installed on another grinding equipment, then a gasket is placed on the grinding platform, and white cotton cloth is placed above the gasket, and the white cotton cloth is pressed flat and tightly against the grinding platform without air bubbles by using a roller, then G50 grinding liquid is poured on the white cotton cloth, and the grinding liquid needs to cover the range of the grinding track of the ferrule; then the grinding equipment is controlled to grind the ferrule and the optical fiber in the ferrule, and the grinding time is 150 seconds.

[0052] It should be noted that during the super-fine grinding process and after the grinding is completed, pure water is sprayed into the intersection between the small clamp and the grinding sheet by using a water gun to ensure that the residues of the grinding are washed away in time and the grinding quality is improved. On the other hand, the setting parameters of the grinding equipment during super-fine grinding are as follows: the rotation speed of the grinding platform is 250 rpm, and the stroke speed is 6 rpm.

[0053] S7: Polishing, the large clamp is removed from the grinding equipment and installed on another grinding equipment, then a gasket is placed on the grinding platform, and a black gasket is placed above the gasket, and the black gasket is pressed flat and tightly against the grinding platform without air bubbles by using a roller, then C30 grinding liquid is poured on the black gasket, and the grinding liquid needs to cover the range of the grinding track of the ferrule; then the grinding equipment is controlled to grind the ferrule and the optical fiber in the ferrule, and the grinding time is 30 seconds.

[0054] It should be noted that during the polishing process and after the grinding is completed, a water gun is used to flush pure water into the intersection between the small clamp and the grinding sheet to ensure that the grinding residue is flushed away in time and the grinding quality is improved. On the other hand, the setting parameters of the grinding equipment during fine grinding are as follows: the rotation speed of the grinding platform is 180 rpm, and the travel speed is 6 rpm.

[0055] S8: cleaning inspection, the large clamp is taken out of the grinding platform, and each ferrule is taken out of the small clamp; then the ferrules are placed in the ultrasonic water tank for cleaning for 3 minutes, and after cleaning, the air gun is used to blow air along the direction of the 45° inclination angle of the ferrule until the ferrule is dried. After cleaning, the end face of the ferrule is detected by using the 3D detection equipment, and then the end face of the ferrule is detected by using the end face detection equipment, and the requirements are that the fiber core aperture is centered, the end face is clean without scratches, and there is no black spot and no depression. The ferrules that pass the inspection are packed in self-sealing bags, and the ferrule grinding work is completed.

[0056] The grinding liquid described above refers to a suspension containing micro-powder abrasive, which needs to be used in cooperation with a grinding sheet or a polishing cloth. The core parameters are the type and particle size of the abrasive.

[0057] In this embodiment, the parameter information of various grinding sheets and grinding liquids is shown in Table 1:

[0058]

[0059] Table 1 is the parameter information table of the grinding sheet and the grinding liquid

[0060] The 3D parameter measurement results of the ferrule end face processed by using the grinding process provided in this embodiment are shown in Table 2:

[0061]

[0062] Table 2 is the 3D parameter information table of the ferrule end face

[0063] The optical performance test results of the ferrule processed by using the grinding process provided in this embodiment are shown in Table 3:

[0064]

[0065] Table 3 is the optical performance test results of the ferrule

[0066] Embodiment 2: as Figures 2-4As shown, a grinding device for implementing the grinding process described in Embodiment 1 comprises a grinding machine body 1, a large clamp 2 detachably arranged on the grinding machine body 1 for mounting the ferrule to be processed. The grinding machine body 1 is provided with a control structure, a driving mechanism and a grinding platform 3. The control structure can be any existing control device such as a PLC or a microcontroller integrated in the grinding machine body 1. The driving mechanism is electrically connected with the control structure. The driving mechanism (such as a servo motor) is installed inside the grinding machine body 1. The output end of the driving mechanism is connected with the grinding platform 3. The driving mechanism drives the grinding platform 3 to move along a preset trajectory (such as an "8" shape movement). The grinding platform 3 is used for placing a grinding film.

[0067] The large clamp 2 is detachably mounted and fixed above the grinding platform 3 through a locking mechanism. The locking mechanism comprises a locking driving member 4 and a locking buckle 5. The locking driving member 4 is connected with the control structure. The locking driving member 4 is connected with the grinding machine body 1. The middle part of the locking buckle 5 is hinged with the grinding machine body 1. The output end of the locking driving member 4 is hinged with one end of the locking buckle 5. The locking driving member 4 can push the locking buckle 5 to rotate and swing, thereby driving the locking buckle 5 to abut against or separate from the large clamp 2. When it is needed to lock the large clamp 2, the large clamp 2 mounted with the product to be processed is placed on the preset position above the grinding platform 3. Then the control structure is controlled to work the locking driving member 4. The locking driving member 4 drives the locking buckle 5 to rotate and swing until the locking buckle 5 abuts against the upper end surface of the large clamp 2, so as to lock and fix the large clamp 2 through the locking buckle 5. When it is needed to loosen the large clamp 2, the control structure is controlled to work the locking driving member 4. The locking driving member 4 drives the locking buckle 5 to reversely rotate and swing until the locking buckle 5 is separated from the large clamp 2. Then the operator can easily take away the large clamp 2 and the product from the grinding machine body 1.

[0068] In order to avoid damaging the surface of the large clamp 2 by the locking buckle 5, a flexible pad 6 is arranged at the end of the locking buckle 5 away from the locking driving member 4. When the locking driving member 4 works, the locking buckle 5 rotating and swinging will drive the flexible pad 6 to abut against the large clamp 2, thereby realizing the function of clamping the large clamp 2. By clamping the large clamp 2 through the flexible pad 6, the surface of the large clamp 2 can be prevented from being damaged by the locking buckle 5, thereby prolonging the service life of the large clamp 2. Meanwhile, the clamping friction can be increased, thereby preventing the large clamp 2 from loosening during the grinding process and ensuring the grinding quality of the end surface of the ferrule.

[0069] In this embodiment, the locking driving member 4 is an electric cylinder. In other embodiments, the locking driving member 4 can also be a pneumatic cylinder, a motor lead screw structure or other linear driving module.

[0070] A wire rack 7 is mounted on the large clamp 2. The wire rack 7 is used for arranging and storing the optical fiber wire harness. By arranging and storing the optical fiber wire harness on the product through the wire rack 7, the wire harness can be prevented from being messy, thereby ensuring the stability of the grinding process.

[0071] A plurality of detachable small clamps 8 are mounted on the large clamp 2, and each small clamp 8 can mount a product to be processed. By arranging a plurality of small clamps 8, the purpose of simultaneously grinding a plurality of products can be achieved, and the processing efficiency is improved. Specifically, the small clamp 8 is provided with a fixing bolt 9 and a positioning pin 10, the fixing bolt 9 is threadedly connected with the large clamp 2, the large clamp 2 is provided with a positioning hole 21 at a position corresponding to the positioning pin 10, and the positioning pin 10 is inserted into the positioning hole 21. When the small clamp 8 is mounted on the large clamp 2, the positioning pin 10 is first aligned with the corresponding positioning hole 21 for insertion to achieve initial positioning; then the fixing bolt 9 is connected with the threaded hole on the large clamp 2 to fix, so as to fasten the small clamp 8 on the large clamp 2.

[0072] Each small clamp 8 is provided with a mounting slot 81 for mounting the ferrule to be ground, and the end surface of the ferrule to be ground faces the grinding platform 3. Specifically, the small clamp 8 is provided with a fixing screw 11 at a position corresponding to the mounting slot 81, the fixing screw 11 is threadedly connected with the small clamp 8, and one end of the fixing screw 11 can extend into the mounting slot 81 for limiting and fixing the ferrule in the mounting slot 81.

[0073] In order to protect the outer surface of the ferrule, a buffer pad 12 is arranged at the end of the fixing screw 11 extending into the mounting slot 81, and the buffer pad 12 can abut against the product to be processed in the mounting slot 81. When the ferrule is installed, the ferrule is inserted into the mounting slot 81, and then the fixing screw 11 is tightened to drive the buffer pad 12 to move until the buffer pad 12 abuts against the side surface of the ferrule, thereby achieving the purpose of fixing the ferrule in the mounting slot 81.

[0074] The working process is as follows:

[0075] Loading: first, install the ferrule on the small clamp 8, and then lock it with the fixing screw 11; then, fix the small clamps 8 with the installed ferrules on the large clamp 2 through the positioning pin 10 and the fixing bolt 9, and arrange the optical fiber harness on the wire rack 7.

[0076] Placing the clamp: place the large clamp 2 carrying the small clamp 8 and the ferrule at a predetermined position of the grinding machine body 1 so that it is above the grinding platform 3.

[0077] Automatic locking: control the locking drive 4 to act through the control mechanism, drive the locking buckle 5 to rotate around the middle hinge point, swing one end of the flexible pad 6 downward, and finally tightly press on the upper surface of the large clamp 2 to complete the locking.

[0078] Grinding: start the equipment, drive the grinding platform 3 to move through the driving mechanism, and grind the end surface of the ferrule.

[0079] Loosen and replace: after grinding is completed, the control mechanism controls the locking drive 4 to reset, pulls the locking buckle 5 to rotate reversely, makes the pressing end lift up, and separates from the large clamp 2. The operator can directly take down the whole large clamp 2, replace another set of large clamp 2 which is installed with the product to be ground, so as to realize quick replacement.

[0080] The above specific embodiments are the preferred embodiments of the present application, and are not intended to limit the specific implementation range of the present application. The scope of the present application includes but is not limited to the specific embodiments. Any equivalent changes made according to the present application are within the protection scope of the present application.

Claims

1. A zero-loss multi-core fiber ferrule polishing process, characterized by, The method comprises the following steps: S1: installing the ferrule, fixing and installing a plurality of ferrules on each small clamp respectively, fixing and installing all the small clamps on a large clamp, and then fixing and installing the large clamp on a grinding device, so that the end face of the ferrule faces the grinding platform of the grinding device; S2: glue removal and grinding, first installing a D30 grinding sheet on the grinding platform and controlling the grinding device to grind the ferrule and the optical fiber in the ferrule, then installing an SC16 grinding sheet on the grinding platform and controlling the grinding device to grind the ferrule and the optical fiber in the ferrule, and using pure water to clean the intersection between the small clamp and the grinding sheet during and after the two grinding processes; S3: cleaning, taking the large clamp off the grinding device, and taking the ferrule with the glue removed off each small clamp, then ultrasonic washing and blowing dry the ferrule, and then performing step S1; S4: fine grinding, first installing a D3 grinding sheet on the grinding platform and controlling the grinding device to grind the ferrule and the optical fiber in the ferrule, then installing an ADS grinding sheet on the grinding platform and controlling the grinding device to grind the ferrule and the optical fiber in the ferrule, and using pure water to clean the intersection between the small clamp and the grinding sheet during and after the two grinding processes; S5: fine grinding, taking off the large clamp, replacing the grinding device and installing the large clamp with the ferrule on the new grinding device, installing a black gasket on the grinding platform, pouring A50 grinding liquid on the black gasket, and then controlling the grinding device to grind the ferrule and the optical fiber in the ferrule; S6: super-fine grinding, taking off the large clamp, replacing the grinding device and installing the large clamp with the ferrule on the new grinding device, installing a white cloth on the grinding platform, pouring G50 grinding liquid on the white cloth, and then controlling the grinding device to grind the ferrule and the optical fiber in the ferrule; S7: polishing, taking off the large clamp, replacing the grinding device and installing the large clamp with the ferrule on the new grinding device, installing a black gasket on the grinding platform, pouring C30 grinding liquid on the black gasket, and then controlling the grinding device to grind the ferrule and the optical fiber in the ferrule, and performing step S3 after polishing is completed; S8: inspection, using a 3D detection device and an end face detection device to detect the end face of the ferrule.

2. The zero-loss multi-core fiber ferrule lapping process of claim 1, wherein: After steps S1 and S3, the height of each ferrule protruding small clamp needs to be checked using a CCD magnifying mirror to ensure that the height of each ferrule protruding small clamp is consistent.

3. The zero-loss multi-core fiber ferrule lapping process of claim 1, wherein: Before step S4, a corner cutting step is further included: installing an SC9 grinding sheet on the grinding platform, setting the rotation speed of the grinding device to 60 rpm and the stroke speed to 6 rpm, and then controlling the grinding device to grind the ferrule and the optical fiber in the ferrule for 60 seconds.

4. The zero-loss multi-core fiber ferrule lapping process of claim 1, wherein: In step S2, the parameters of the grinding device are set as follows: the rotation speed of the grinding platform is 50 rpm, the stroke speed is 4-6 rpm, and the time for each grinding is 10 seconds; In steps S4 and S6, the parameters of the grinding device are set as follows: the rotation speed of the grinding platform is 250 rpm, and the stroke speed is 6 rpm; in step S4, the time for each grinding is 20 seconds, and in step S6, the grinding time is 150 seconds; In steps S5 and S7, the parameters of the grinding device are set as follows: the rotation speed of the grinding platform is 180 rpm, and the stroke speed is 6 rpm; wherein the grinding time in step S5 is 50-80 seconds, and the grinding time in step S7 is 30 seconds.

5. The zero-loss multi-core fiber ferrule lapping process of claim 1, wherein: In step S3, the ferrule with the optical fiber is first placed in the ultrasonic water tank for cleaning for 3 minutes, and then the air gun is used to blow air along the direction of the 45° inclination angle of the ferrule until the ferrule is dried.

6. The zero-loss multi-core optical fiber ferrule lapping process of any of claims 1-5, wherein: After each installation of the grinding sheet, black gasket or white cloth, the roller is used for pressing to ensure that it is flat, tightly attached to the grinding platform and free of bubbles.

7. A polishing apparatus for carrying out the polishing process of the zero- loss multicore fiber ferrule according to any one of claims 1 to 6, characterized in that The grinding machine comprises a grinding machine body and a large clamp detachably connected with the grinding machine body, the grinding machine body is provided with a control mechanism, a driving mechanism and a grinding platform, the driving mechanism is electrically connected with the control mechanism, and the grinding platform is connected with the output end of the driving mechanism; The grinding machine body is also provided with a locking mechanism, the locking mechanism is detachably connected with the large clamp, and the locking mechanism is used for locking the large clamp above the grinding platform; The large clamp is provided with a plurality of detachable small clamps, the small clamps are provided with installation grooves, and the installation grooves are used for installing the ferrules.

8. The lapping apparatus of claim 7, wherein: The large clamp is provided with a wire rack, the wire rack is used for storing optical fiber wire bundles, the small clamps are provided with fixing bolts and positioning pins, the fixing bolts are threadedly connected with the large clamp, corresponding positions of the large clamp are respectively provided with positioning holes, and the positioning pins are inserted into the positioning holes.

9. The lapping apparatus of claim 7, wherein: Corresponding positions of the small clamps are respectively provided with fixing screws, the fixing screws are threadedly connected with the small clamps, one end of the fixing screw can extend into the installation groove, and the fixing screw is used for limiting and fixing the ferrule in the installation groove.

10. The lapping apparatus of claim 7, wherein: The locking mechanism comprises a locking cylinder and a locking buckle, the locking cylinder is connected with the grinding machine body, the middle part of the locking buckle is hinged with the grinding machine body, the output end of the locking cylinder is hinged with one end of the locking buckle, the locking cylinder can drive the locking buckle to rotate and swing, and then the end of the locking buckle away from the locking cylinder is in abutment or separation with the large clamp.

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