Preparation method of multi-core optical fiber

Abstract

The invention discloses a preparation method of a multi-core optical fiber, and relates to the technical field of multi-core optical fibers. The device comprises a machining system, the machining system comprises a lathe body and a translation machining machine head, three-jaw chucks are arranged on the two sides of the lathe body, a sliding beam is fixed to the top of the lathe body, and the translation machining machine head comprises a rack, a cutting mechanism and a grinding mechanism; a linear sliding set in sliding fit and transmission connection with the sliding beam is fixed to one side of the top of the top seat, the cutting mechanism comprises a cutting motor, and a cutter head is fixed to the output end of the cutting motor. By designing the novel machining system, a cylindrical solid rod body can be machined into a rod body of a fan-shaped structure, the equipment integration effect is good, cutting and fine grinding are integrated, so that the working efficiency is improved, meanwhile, stable supporting can be conducted through the supporting wheels during cutting and grinding, the machining stability is improved, and the machining quality is improved. And the subsequent machining precision is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of multi-core optical fibers, and in particular relates to a method for preparing a multi-core optical fiber. Background Art

[0002] For the production and preparation of multi-core optical fibers, the optical fiber preform rods of the sheathed rod assembly method can now be used for drawing production. Each rod body corresponds to a fiber core. After assembly, a certain number of fiber cores are distributed at intervals, and multi-core optical fibers are prepared after drawing.

[0003] Among them, the split rod body is obtained by mechanically processing a cylindrical solid rod body. For example, a combination of multiple fan-shaped split rod bodies is used to make a preform rod. The specification accuracy of the fan-shaped rod body is required to be high, otherwise the quality of the subsequent preform rod cannot be guaranteed, and the quality of the optical fiber cannot be guaranteed accordingly. In addition, how to process the cylindrical rod body into a fan-shaped structure is also a difficult point. It is also necessary to ensure that the fiber core at the original axis is in the split rod body after processing. Therefore, how to design a processing system for high-precision, stable and efficient processing of the rod body is a problem that needs to be solved by the staff in this field. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for preparing multi-core optical fiber. By designing a new processing system, a cylindrical solid rod can be processed into a rod with a fan-shaped structure. The equipment integration effect is good, and cutting and fine grinding are integrated into one, thereby improving work efficiency. At the same time, the support wheel can provide stable support during cutting and grinding, thereby improving processing stability and ensuring subsequent processing accuracy.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a method for preparing a multi-core optical fiber, comprising a processing system; The processing system includes a lathe body and a translation processing head, three-jaw chucks are provided on both sides of the lathe body, and a sliding beam is fixed on the top of the lathe body; The translation processing head includes a frame, a cutting mechanism and a grinding mechanism; The frame includes a top seat, and a linear slide group that is slidably matched with the sliding beam and is transmission-connected to the top side of the top seat is fixed; The cutting mechanism includes a cutting motor, a cutter disc is fixed to the output end of the cutting motor, and the cutting motor is horizontally arranged at the bottom of the top seat through a lifting cylinder; A group of columns are fixed to the bottom of one side of the top seat, an L-shaped seat plate is fixed to the bottom of the other side of the top seat, pads are fixed to the bottom ends of the two columns, a first cylinder is fixed to the inner side of the bottom end of the column, and a support wheel is fixed to the telescopic end of the first cylinder through a wheel frame; The grinding mechanism includes a grinding motor, a grinding disc is fixed to the output end of the grinding motor, the grinding motor is slidably arranged at the bottom of the L-shaped seat plate through a carriage, and a second cylinder is fixed between the carriage and the vertical plate part of the L-shaped seat plate; The method for preparing the multi-core optical fiber includes the following steps: SS01 Deposit the cladding and core of the preform by PCVD process or MCVD process and collapse them into a solid rod, and there is a core at the axis of the solid rod; SS02 Mechanically process the core rod in SS01 through a processing system, process it into a sector according to the design requirements, and ensure that the core is in the sector rod; SS03 Bundle multiple sector preforms into a cylinder according to the design requirements, insert the obtained cylindrical multi-core rod into the prepared sleeve, and the preform manufacturing is completed; SS04 Draw the preform through a drawing device under the state of evacuating the tail of the preform.

[0006] Further, the processing method of the processing system in SS02 is as follows: SS021 Connect clamping ends with reduced diameters to both ends of the solid rod body in SS01, and clamp the clamping ends at both ends of the core rod in the three-jaw chucks of the lathe body; SS022 Control the two first cylinders to extend, control the two supporting wheels to closely adhere to the outer side of the solid rod body, control the cutting motor and the cutter head to move downward through the lifting cylinder to cut the solid rod body, and then drive the cutter head to linearly move through the sliding beam for cutting the whole rod; SS023 Control the lifting cylinder to reset, drive the cutter head to rise away from the solid rod body, and control the second cylinder to extend. The cutting surface in SS022 can be ground by the grinding motor and the grinding disc; SS024 Control the second cylinder to reset, adjust the clamping angle of the solid rod body on the three-jaw chuck, control the lifting cylinder to descend again, and cut and grind the other inclined surface of the sector rod according to the method of SS022 to form a sector rod body; SS025 After the two flat inclined surfaces are processed, adjust the clamping angle of the solid rod body on the three-jaw chuck again, face the arc surface of the sector rod body towards the grinding disc, and process the arc surface of the sector rod body through the grinding disc so that the outer diameter of the arc surface is consistent with the inner diameter of the sleeve in SS03.

[0007] Further, a fixed box and a sliding box are respectively arranged on both sides of the lathe body, the two three-jaw chucks are respectively rotatably arranged on the opposite sides of the fixed box and the sliding box, and a rotary drive is arranged in the fixed box, and the rotary drive is in transmission connection with the three-jaw chuck.

[0008] Further, a lead screw mechanism is arranged on the sliding beam, and a nut sleeve in transmission connection with the lead screw mechanism is arranged on the top of the top seat.

[0009] Further, a fastening sleeve is fixed on the circumferential side surface of the cutting motor. Outer convex parts are arranged on both opposite sides of the fastening sleeve. Guide columns are fixed on the outer convex parts. The guide columns penetrate through the top seat and are slidably connected with the top seat.

[0010] Further, the wheel frame is a seat body with a C-shaped structure, and the bottom surface of the wheel frame slides along the upper surface of the backing plate.

[0011] Further, grooves are arranged on the supporting wheel. The cross-section of the grooves is of a semi-circular structure and the inner diameter is consistent with the outer diameter of the solid rod in SS01.

[0012] Further, rib plates are fixed on both sides between the horizontal side part and the vertical side part of the seat plate. The rib plates are of a right-angled triangle structure or a right-angled trapezoid structure.

[0013] Further, a fixing hoop is fixed on the circumferential side surface of the grinding motor. The sliding frame includes a sliding seat. A group of connecting columns are arranged between the sliding seat and the fixing hoop. The lower surface of the sliding seat and the upper surface of the fixing hoop are respectively attached to the upper surface and the lower surface of the seat plate.

[0014] Further, a group of chutes parallel to the second cylinder are arranged on the horizontal side part of the seat plate. The connecting columns penetrate through the chutes and are slidably connected with the chutes.

[0015] The present invention has the following beneficial effects: 1. By designing a novel processing system, the present invention can process a cylindrical solid rod into a rod with a fan-shaped structure. The equipment integration effect is good, integrating cutting and fine grinding into one, thereby improving work efficiency. At the same time, during cutting and grinding, stable support can be carried out through the supporting wheel, thereby improving processing stability and ensuring subsequent processing accuracy.

[0016] 2. By designing the final preform rod composed of fan-shaped sub-rod bodies, there are two inclined surfaces in the fan-shaped structure, and both inclined surfaces are flat straight surfaces, which is convenient for cutting and conducive to subsequent grinding and trimming, thereby improving the processing accuracy of the sub-rod bodies, reducing the gaps generated between adjacent surfaces during the rod assembling process, improving the compactness of the preform rod, and thus improving the accuracy of subsequent multi-core optical fibers.

[0017] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 Schematic structural diagram of the translation processing head of the processing system of the present invention; Figure 2 Schematic structural diagram after cutting the solid rod in SS022; Figure 3 Schematic structural diagram after cutting the solid rod in SS024; Figure 4 Schematic structural diagram of the processing system of the present invention; Figure 5 Schematic structural diagram of the preform in SS03 of the present invention; In the accompanying drawings, the list of components represented by each reference numeral is as follows: 1 - Lathe body, 2 - Three - jaw chuck, 3 - Sliding beam, 4 - Frame, 5 - Cutting mechanism, 6 - Grinding mechanism, 101 - Fixed box, 102 - Sliding box, 301 - Nut sleeve, 401 - Top seat, 402 - Linear slide group, 403 - Column, 404 - Seat plate, 405 - Cushion plate, 406 - First cylinder, 407 - Wheel frame, 408 - Support wheel, 409 - Groove, 410 - Rib plate, 501 - Cutting motor, 502 - Cutter disc, 503 - Lifting cylinder, 504 - Fastening sleeve, 505 - Convex part, 506 - Guide post, 601 - Grinding motor, 602 - Grinding disc, 603 - Slide carriage, 604 - Second cylinder, 605 - Fixed hoop, 606 - Slide seat, 607 - Connecting column. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0021] Please refer to Figures 1-5 As shown, the present invention is a method for preparing a multi - core optical fiber, including a processing system; The processing system includes a lathe body 1 and a translation processing head. Three - jaw chucks 2 are provided on both sides of the lathe body 1, and a sliding beam 3 is fixed on the top of the lathe body 1; The translation processing head includes a frame 4, a cutting mechanism 5 and a grinding mechanism 6; The frame 4 includes a top seat 401, and a linear slide group 402 which is fixedly connected to and slidably engaged with the sliding beam 3 is fixed on one side of the top of the top seat 401; The cutting mechanism 5 includes a cutting motor 501, a cutter disc 502 is fixed to the output end of the cutting motor 501, and the cutting motor 501 is horizontally arranged at the bottom of the top seat 401 through a lifting cylinder 503; A set of columns 403 are fixed to the bottom on one side of the top seat 401, and a seat plate 404 with an L-shaped structure is fixed to the bottom on the other side of the top seat 401. The bottom ends of the two columns 403 are fixed with a backing plate 405, and a first cylinder 406 is fixed to the inner side of the bottom ends of the columns 403. The telescopic end of the first cylinder 406 is fixed with a support wheel 408 through a wheel frame 407; The grinding mechanism 6 includes a grinding motor 601. A grinding disc 602 is fixed to the output end of the grinding motor 601. The grinding motor 601 is slidably arranged at the bottom of the L-shaped seat plate 404 through a carriage 603. A second cylinder 604 is fixed between the carriage 603 and the vertical plate part of the L-shaped seat plate 404; The preparation method of the multi-core optical fiber includes the following steps: SS01 Deposit the cladding and core of the preform by PCVD process or MCVD process and collapse them into a solid rod. There is a core at the axis of the solid rod; SS02 Mechanically process the core rod in SS01 through a processing system, process it into a sector according to design requirements, and ensure that the core is in the sector rod; SS03 Bundle multiple sector preforms into a cylinder according to design requirements, insert the obtained cylindrical multi-core rod into a prepared sleeve, and the preform manufacturing is completed; SS04 Draw the preform through a drawing device under the state of evacuating the tail of the preform.

[0022] Among them, the processing method of the processing system in SS02 is: SS021 Connect clamping ends with reduced diameters to both ends of the solid rod body in SS01, and clamp the clamping ends at both ends of the core rod in the three-jaw chuck 2 of the lathe body 1; SS022 Control the two first cylinders 406 to extend, control the two support wheels 408 to closely adhere to the outside of the solid rod body, control the cutting motor 501 and the cutter head 502 to move downward through the lifting cylinder 503 to cut the solid rod body, and then drive the cutter head 502 to linearly move through the sliding beam 3 for cutting the whole rod; SS023 Control the lifting cylinder 503 to reset, drive the cutter head 502 to rise away from the solid rod body, and control the second cylinder 604 to extend. The cutting surface in SS022 can be ground through the grinding motor 601 and the grinding disc 602; SS024 Control the second cylinder 604 to reset, adjust the clamping angle of the solid rod body on the three-jaw chuck 2, and control the lifting cylinder 503 to descend again. Cut and grind another inclined surface of the sector rod according to the method of SS022 to form a sector rod body; After the two flat inclined planes are processed, adjust the clamping angle of the solid rod on the three-jaw chuck 2 again, orient the arc surface of the sector rod towards the grinding disc 602, and process the arc surface of the sector rod through the grinding disc 602 so that the outer diameter of the arc surface is consistent with the inner diameter of the sleeve in SS03.

[0023] As shown in Figure 4 , fixed boxes 101 and sliding boxes 102 are respectively arranged on both sides of the lathe body 1, and two three-jaw chucks 2 are respectively rotatably arranged on the opposite sides of the fixed box 101 and the sliding box 102. A rotary drive is arranged in the fixed box 101, and the rotary drive is in transmission connection with the three-jaw chuck 2.

[0024] As shown in Figures 1-3 , a lead screw mechanism is arranged on the sliding beam 3, and a nut sleeve 301 in transmission connection with the lead screw mechanism is arranged on the top of the top seat 401.

[0025] As shown in Figures 1-3 , a fastening sleeve 504 is fixed on the circumferential side of the cutting motor 501. Outer convex parts 505 are arranged on a pair of opposite sides of the fastening sleeve 504, and a guide post 506 is fixed on the outer convex part 505. The guide post 506 penetrates through the top seat 401 and is slidably connected with the top seat 401.

[0026] As shown in Figures 1-3 , the wheel frame 407 is a seat body with a C-shaped structure, and the bottom surface of the wheel frame 407 slides along the upper surface of the backing plate 405.

[0027] As shown in Figures 1-3 , a groove 409 is arranged on the support wheel 408. The cross-section of the groove 409 is a semi-circular structure and the inner diameter is consistent with the outer diameter of the solid rod in SS01.

[0028] As shown in Figures 1-3 , stiffening plates 410 are respectively fixed on both sides between the horizontal side part and the vertical side part of the seat plate 404. The stiffening plates 410 are of a right triangle structure or a right trapezoid structure.

[0029] As shown in Figure 1 , a fixing hoop 605 is fixed on the circumferential side of the grinding motor 601. The carriage 603 includes a sliding seat 606. A group of connecting columns 607 are arranged between the sliding seat 606 and the fixing hoop 605. The lower surface of the sliding seat 606 and the upper surface of the fixing hoop 605 are respectively attached to the upper surface and the lower surface of the seat plate 404.

[0030] Among them, a group of chutes parallel to the second cylinder 604 are arranged on the horizontal side part of the seat plate 404, and the connecting column 607 penetrates through the chutes and is slidably connected with the chutes.

[0031] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0032] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A method for preparing a multi-core optical fiber, characterized in that: Including processing systems; The processing system comprises a lathe body (1) and a translation processing head, three-jaw chucks (2) are provided on both sides of the lathe body (1), and a sliding beam (3) is fixed on the top of the lathe body (1); The translation processing head comprises a frame (4), a cutting mechanism (5) and a grinding mechanism (6); The frame (4) includes a top seat (401), and a linear sliding group (402) is fixed on one side of the top of the top seat (401) and is in sliding cooperation with the sliding beam (3) and in transmission connection. The cutting mechanism (5) comprises a cutting motor (501), a cutter disc (502) is fixed to the output end of the cutting motor (501), and the cutting motor (501) is horizontally arranged at the bottom of the top seat (401) via a lifting cylinder (503); A group of columns (403) are fixed to the bottom of one side of the top seat (401), an L-shaped seat plate (404) is fixed to the bottom of the other side of the top seat (401), a pad (405) is fixed to the bottom ends of the two columns (403), a first cylinder (406) is fixed to the inner side of the bottom end of the column (403), and a support wheel (408) is fixed to the telescopic end of the first cylinder (406) via a wheel frame (407); The grinding mechanism (6) includes a grinding motor (601), a grinding disc (602) is fixed to the output end of the grinding motor (601), the grinding motor (601) is slidably arranged on the bottom of the L-shaped seat plate (404) via a slide (603), and a second cylinder (604) is fixed between the slide (603) and the vertical plate portion of the L-shaped seat plate (404); The method for preparing the multi-core optical fiber comprises the following steps: SS01 uses PCVD or MCVD to deposit the cladding and core layers of the preform and collapse it into a solid rod with a core at the axis. SS02 uses the machining system to machine the core rod in SS01 into a fan shape according to design requirements, and ensures that the fiber core is in the fan-shaped rod; SS03: Multiple fan-shaped preform rods are bundled into a cylinder according to design requirements. The resulting cylindrical multi-core rod is inserted into the prepared casing, and the preform rod manufacturing is completed. SS04 is drawn by a wire drawing device while the tail of the preform rod is vacuumed.

2. The manufacturing method of a multi-core optical fiber according to claim 1, characterized in that, The processing method of the processing system in the SS02 is: SS021 Connect the clamping ends with reduced diameter to both ends of the solid rod of SS01, and clamp the clamping ends at both ends of the core rod in the three-jaw chuck (2) of the lathe body (1); SS022 controls the two first cylinders (406) to extend, controls the two support wheels (408) to be close to the outside of the solid rod, controls the cutting motor (501) and the cutter disc (502) to move downward through the lifting cylinder (503) to cut the solid rod, and then drives the cutter disc (502) to move linearly through the sliding beam (3) to cut the whole rod; SS023 controls the lifting cylinder (503) to reset, drives the cutter disc (502) to rise away from the solid rod, and controls the second cylinder (604) to extend, so that the cutting surface in SS022 can be ground through the grinding motor (601) and the grinding disc (602); SS024 controls the reset of the second cylinder (604), adjusts the clamping angle of the solid rod on the three-jaw chuck (2), controls the lowering of the lifting cylinder (503) again, and cuts and grinds another inclined surface of the sector rod according to the method of SS022 to form a sector rod; After the processing of the two flat inclined surfaces is completed, adjust the clamping angle of the solid rod on the three-jaw chuck (2) again, orient the arc surface of the sector rod towards the grinding disc (602), and process the arc surface of the sector rod through the grinding disc (602) so that the outer diameter of the arc surface is consistent with the inner diameter of the sleeve in SS03.

3. The preparation method of a multi-core optical fiber according to claim 1, characterized in that, Fixed boxes (101) and sliding boxes (102) are respectively arranged on both sides of the lathe body (1). The two three-jaw chucks (2) are respectively rotatably arranged on the opposite sides of the fixed box (101) and the sliding box (102). A rotary drive is arranged in the fixed box (101), and the rotary drive is in transmission connection with the three-jaw chuck (2).

4. The manufacturing method of a multi-core optical fiber according to claim 1, characterized in that, A lead screw mechanism is arranged on the sliding beam (3), and a nut sleeve (301) in transmission connection with the lead screw mechanism is arranged on the top of the top seat (401).

5. The manufacturing method of a multi-core optical fiber according to claim 1, characterized in that, A fastening sleeve (504) is fixed on the circumferential side of the cutting motor (501). Outer convex parts (505) are arranged on one pair of opposite sides of the fastening sleeve (504). Guide columns (506) are fixed on the outer convex parts (505). The guide columns (506) penetrate through the top seat (401) and are slidably connected with the top seat (401).

6. The preparation method of a multi-core optical fiber according to claim 1, characterized in that, The wheel frame (407) is a seat body with a C-shaped structure, and the bottom surface of the wheel frame (407) slides along the upper surface of the backing plate (405).

7. A method for preparing a multi-core optical fiber according to claim 1, characterized in that, A groove (409) is arranged on the support wheel (408). The cross-section of the groove (409) is a semi-circular structure and the inner diameter is consistent with the outer diameter of the solid rod in SS01.

8. The manufacturing method of a multi-core optical fiber according to claim 1, characterized in that Reinforcing plates (410) are fixed on both sides between the horizontal side and the vertical side of the seat plate (404). The reinforcing plates (410) are in a right triangle structure or a right trapezoid structure.

9. The manufacturing method of a multi-core optical fiber according to claim 1, characterized in that A fixed hoop (605) is fixed on the circumferential side of the grinding motor (601). The carriage (603) includes a sliding seat (606). A group of connecting columns (607) are arranged between the sliding seat (606) and the fixed hoop (605). The lower surface of the sliding seat (606) and the upper surface of the fixed hoop (605) are respectively attached to the upper surface and the lower surface of the seat plate (404).

10. A method for preparing a multi-core optical fiber according to claim 9, characterized in that, A group of chutes parallel to the second cylinder (604) are arranged on the horizontal side of the seat plate (404). The connecting columns (607) penetrate through the chutes and are slidably connected with the chutes.

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