CN105776837A - How to make an optical fiber - Google Patents

Abstract

The invention discloses a manufacturing method of an optical fiber, which comprises the following steps: 1) welding an auxiliary rod to one end of the preform: 2) clamping the auxiliary rod to make the prefabricated rod in vertical shape; 3) controlling the flame to reciprocate along the axial direction of the prefabricated rod and the circumferential direction of the prefabricated rod, and carrying out high-temperature annealing treatment on the prefabricated rod; 4) and performing a wire drawing process on the preform subjected to the high-temperature annealing treatment. Compared with the existing manufacturing method, the high-temperature annealing treatment is carried out on the prefabricated rod by controlling the flame to reciprocate along the axial direction of the prefabricated rod and along the circumferential direction of the prefabricated rod, and the prefabricated rod does not need to be clamped by two chucks, so that only one auxiliary rod needs to be welded.

Description

How to make an optical fiber

technical field

The invention relates to the field of optical fibers, in particular to a method for manufacturing optical fibers.

Background technique

In optical fiber manufacturing, it is necessary to flame grind the preform before the drawing process. Before the flame grinding of the preform, an auxiliary rod is welded to each end of the preform, and then the two chucks hold the corresponding auxiliary rods respectively. When the two chucks rotate at the same speed, the preform and the auxiliary rod are driven to rotate, and the preform is burned at high temperature by a movable blowtorch. The blowtorch uses hydrogen and oxygen as fuel, and generates a high temperature of about 2300°C during combustion , can remove impurities and dust on the surface of the preform, release the unevenly distributed internal stress in the preform, heal the fine cracks on the surface of the preform, and avoid fiber breakage during the wire drawing process. After flame grinding, one of the auxiliary rods needs to be fused before the wire drawing process, and the remaining auxiliary rod is used to cooperate with the clamp of the wire drawing equipment to play the role of being clamped.

The above-mentioned manufacturing process has the following defects: two auxiliary rods need to be welded before flame grinding, and one of the auxiliary rods needs to be fused after flame grinding. The whole process is complicated, time-consuming and low in efficiency.

Contents of the invention

Aiming at the above problems, the present invention proposes a method for manufacturing an optical fiber. The method solves the problems of complex procedures, long time consumption and low processing efficiency caused by fusing two auxiliary rods first and then fusing one auxiliary rod in the existing manufacturing method.

The technical scheme that the present invention takes is as follows:

A method of manufacturing an optical fiber, comprising the steps of:

1) An auxiliary rod is welded to one end of the prefabricated rod;

2) Clamp the auxiliary rod so that the preform is vertical;

3) Controlling the reciprocating movement of the flame along the axial direction of the preform rod and along the circumferential direction of the preform rod, and performing high-temperature annealing treatment on the preform rod;

4) A wire drawing process is performed on the preform after the high-temperature annealing treatment.

In the existing manufacturing method, two chucks drive the preform to rotate, and then the blowtorch only needs to reciprocate along the axial direction of the preform to perform high-temperature annealing treatment. Compared with the existing manufacturing method, the present invention performs high-temperature annealing treatment on the preform by controlling the flame along the axial direction of the preform and along the circumferential direction of the preform. The preform does not need to be held by two chucks, so only welding is required. An auxiliary rod, the invention effectively simplifies the process and improves the processing efficiency.

In actual use, the preform may not rotate. In order to further improve the uniformity of flame heating, optionally, in step 3), while controlling the motion of the flame, the preform is controlled to rotate along its own axis, and the rotation speed of the preform is 5-5. 15r/min.

Optionally, the step 3) is operated by flame grinding equipment, and the flame grinding equipment includes:

base;

The clamping frame is fixed on the base, the top of the clamping frame is provided with a chuck for clamping the auxiliary rod, and the axis of the chuck is vertically arranged;

Two moving seats are slidably installed on the base, and the two moving seats are respectively located on both sides of the clamping frame;

a first driving mechanism, used to drive the moving seat to approach or move away from the clamping frame;

The blowtorch lamp holder is slidably installed on the moving seat, and the blowtorch lamp holder is equipped with a blowtorch that can rotate back and forth around a vertical axis;

The second driving mechanism is used to drive the lamp base of the blowtorch to reciprocate up and down.

When the flame grinding equipment is working, the auxiliary rod is clamped by the clamping frame, so that the preform is vertical; the moving seat is driven by the first driving mechanism to move to the clamping frame, so that the two blowtorch lamp holders are respectively located on both sides of the preform rod ; Through the second drive mechanism, the blowtorch lamp holder moves up and down reciprocatingly, and at the same time, the blowtorch rotates back and forth around a vertical axis.

Optionally, the blowtorch lamp holder includes:

The lamp holder body, the side of the lamp holder body adjacent to the clamping frame has an arc-shaped side wall, the upper surface of the lamp holder body adjacent to the arc-shaped side wall has two arc-shaped grooves distributed at intervals, and adjacent to the arc-shaped The side wall is a first arc-shaped groove, and the one away from the arc-shaped side wall is a second arc-shaped groove. The axes of the side walls of the two arc-shaped grooves coincide, and the inner side wall of the first arc-shaped groove provided with a rack;

The torch frame is equipped with a motor, the output shaft of the motor cooperates with the rack through a gear, and the torch is installed on the torch frame;

One end of the limit rod is relatively fixed to the torch holder, and the other end extends into the second arc-shaped groove.

There are four arc-shaped side walls in the arc-shaped groove of each lamp holder body, and the axes of the four arc-shaped side walls coincide; the axis of the side wall refers to the distance between the positions of the points on the side wall and the straight line The line that is equal. The structure of the blowtorch holder enables the blowtorch holder to reciprocate along the first arc-shaped groove, thereby driving the blowtorch to reciprocate along the circumferential direction of the preform rod. The two blowtorch lamp holders cooperate with each other to realize the preform circumferential direction. High temperature annealing operation.

Optionally, both the first driving mechanism and the second driving mechanism are air cylinders.

Optionally, a limiting block cooperating with the moving seat is fixed on the base, and the limiting block is arranged between the moving seat and the clamping frame.

By arranging the limit block, the position of the movable seat can be limited to prevent the lamp seat of the torch from abutting against the preform rod.

Optionally, the flame grinding device further includes a third drive mechanism for driving the chuck to rotate.

During actual operation, the slow rotation of the preform rod is implemented by the third driving mechanism.

The beneficial effect of the present invention is that the high-temperature annealing treatment is performed on the preform rod by controlling the flame along the axial direction of the preform rod and along the circumferential direction of the preform rod, and the preform rod does not need to be held by two chucks, so only one Auxiliary rod, the invention effectively simplifies the technological process and improves the processing efficiency.

Description of drawings:

Fig. 1 is the flowchart of the manufacturing method of optical fiber of the present invention;

Fig. 2 is the structural representation of flame grinding equipment;

Fig. 3 is an enlarged view of A in Fig. 2 .

Each reference mark in the figure is:

1. Base, 2. First driving mechanism, 3. Moving seat, 4. Limiting block, 5. Blowtorch lamp holder, 6. Second driving mechanism, 7. Clamping frame, 8. Chuck, 9. Auxiliary Rod, 10, prefabricated rod, 11, lamp holder body, 12, second arc-shaped groove, 13, gear, 14, limit rod, 15, first arc-shaped groove, 16, blowtorch holder, 17, blowtorch, 18. Curved side walls.

detailed description:

Below in conjunction with each accompanying drawing, the present invention is described in detail.

As shown in Figure 1, this embodiment discloses a method for manufacturing an optical fiber, including the following steps:

1) An auxiliary rod is welded to one end of the prefabricated rod;

2) Clamp the auxiliary rod so that the preform is vertical;

3) Controlling the reciprocating movement of the flame along the axial direction of the preform rod and along the circumferential direction of the preform rod, and performing high-temperature annealing treatment on the preform rod;

4) A wire drawing process is performed on the preform after the high-temperature annealing treatment.

In the existing manufacturing method, two chucks drive the preform to rotate, and then the blowtorch only needs to reciprocate along the axial direction of the preform to perform high-temperature annealing treatment. Compared with the existing manufacturing method, the present invention performs high-temperature annealing treatment on the preform by controlling the flame along the axial direction of the preform and along the circumferential direction of the preform. The preform does not need to be held by two chucks, so only welding is required. An auxiliary rod, the invention effectively simplifies the process and improves the processing efficiency.

The preform may not be rotated. In actual use, in order to further improve the uniformity of flame heating, in step 3), while controlling the motion of the flame, the preform is controlled to rotate slowly along its own axis. The rotation speed of the preform is 5 ~ 15r/min.

Present embodiment step 3) is operated by flame grinding equipment, as shown in Figure 2 and 3, flame grinding equipment comprises:

base 1;

The clamping frame 7 is fixed on the base, and the top of the clamping frame is provided with a chuck 8 for clamping the auxiliary rod 9, and the axis of the chuck is vertically arranged;

Two moving seats 3 are slidably installed on the base 1, and the two moving seats are respectively located on both sides of the clamping frame 7;

The first driving mechanism 2 is used to drive the moving base 3 to approach or move away from the clamping frame 7;

The blowtorch lamp holder 5 is slidably installed on the moving seat 3, and the blowtorch lamp holder 5 is equipped with a blowtorch 17 that can rotate back and forth around a vertical axis;

The second drive mechanism 6 is used to drive the lamp base of the torch to reciprocate up and down.

In this embodiment, the blowtorch lamp holder 5 includes:

The lamp holder body 11 has an arc-shaped side wall 18 on one side of the lamp holder body adjacent to the holder frame. The upper surface of the lamp holder body adjacent to the arc-shaped side wall has two arc-shaped grooves distributed at intervals, and adjacent to The arc-shaped side wall is the first arc-shaped groove 15, and the second arc-shaped groove 12 is away from the arc-shaped side wall. The axes of the side walls of the two arc-shaped grooves coincide, and the first arc-shaped groove The inner wall is provided with a rack;

The torch frame 16 is equipped with a motor, and the output shaft of the motor cooperates with the rack through the gear 13, and the torch 17 is installed on the torch frame 16;

One end of the limit rod 14 is relatively fixed to the torch holder 16 , and the other end extends into the second arc-shaped groove 12 .

There are four arc-shaped side walls in the arc-shaped groove of each lamp holder body, and the axes of the four arc-shaped side walls coincide; equal to that line. The structure of the blowtorch holder enables the torch holder to reciprocate along the first arc-shaped groove, thereby driving the blowtorch to reciprocate along the circumferential direction of the preform rod. The two blowtorch lamp holders cooperate with each other to realize the circumferential movement of the preform rod High temperature annealing operation.

In this embodiment, both the first driving mechanism 2 and the second driving mechanism 6 are air cylinders. The base 1 is fixed with a limit block 4 that cooperates with the movable seat, and the limit block is arranged between the movable seat and the clamping frame. By arranging the limit block, the position of the movable seat can be limited to prevent the lamp seat of the torch from abutting against the preform rod.

In this embodiment, the flame grinding device further includes a third driving mechanism for driving the chuck to rotate. During actual operation, the slow rotation of the preform rod is implemented by the third driving mechanism.

When the flame grinding equipment of this embodiment is working, the auxiliary rod is clamped by the clamping frame, so that the preform is vertical; the moving seat is driven by the first driving mechanism to move to the clamping frame, so that the two blowtorch lamp holders are respectively located On both sides of the preform rod; through the second driving mechanism, the lamp base of the blowtorch reciprocates up and down, and at the same time, the motor works under the cooperation of the limit rod and the second arc-shaped groove, and the blowtorch can reciprocate along the direction of the first arc-shaped groove , performing high-temperature annealing treatment on the preform rod 10 .

The above are only preferred embodiments of the present invention, and are not intended to limit the scope of patent protection of the present invention. All equivalent structural transformations made by using the description of the present invention and the contents of the accompanying drawings are directly or indirectly used in other related technical fields. theory is included within the protection scope of the present invention.

Claims (7)

1. A method for manufacturing an optical fiber, comprising the following steps: 1) An auxiliary rod is welded to one end of the prefabricated rod; 2) Clamp the auxiliary rod so that the preform is vertical; 3) Controlling the reciprocating movement of the flame along the axial direction of the preform rod and along the circumferential direction of the preform rod, and performing high-temperature annealing treatment on the preform rod; 4) A wire drawing process is performed on the preform after the high-temperature annealing treatment. 2. The optical fiber manufacturing method according to claim 1, characterized in that in step 3), while controlling the motion of the flame, the preform is controlled to rotate along its own axis, and the rotation speed of the preform is 5-15 r/min. 3. The manufacturing method of optical fiber as claimed in claim 1, it is characterized in that, described step 3) is operated by flame grinding equipment, and described flame grinding equipment comprises: base; The clamping frame is fixed on the base, the top of the clamping frame is provided with a chuck for clamping the auxiliary rod, and the axis of the chuck is vertically arranged; Two moving seats are slidably installed on the base, and the two moving seats are respectively located on both sides of the clamping frame; a first driving mechanism, used to drive the moving seat to approach or move away from the clamping frame; The blowtorch lamp holder is slidably installed on the moving seat, and the blowtorch lamp holder is installed with a blowtorch that can rotate back and forth around a vertical axis; The second driving mechanism is used to drive the lamp base of the blowtorch to reciprocate up and down. 4. The manufacturing method of optical fiber as claimed in claim 3, is characterized in that, described blowtorch lamp holder comprises: The lamp holder body, the side of the lamp holder body adjacent to the clamping frame has an arc-shaped side wall, the upper surface of the lamp holder body adjacent to the arc-shaped side wall has two arc-shaped grooves distributed at intervals, and adjacent to the arc-shaped The side wall is a first arc-shaped groove, and the one away from the arc-shaped side wall is a second arc-shaped groove. The axes of the side walls of the two arc-shaped grooves coincide, and the inner side wall of the first arc-shaped groove provided with a rack; The torch frame is equipped with a motor, the output shaft of the motor cooperates with the rack through a gear, and the torch is installed on the torch frame; One end of the limit rod is relatively fixed to the torch holder, and the other end extends into the second arc-shaped groove. 5. The method for manufacturing an optical fiber according to claim 3, wherein both the first driving mechanism and the second driving mechanism are air cylinders. 6 . The method for manufacturing an optical fiber according to claim 3 , wherein a limiting block cooperating with the moving seat is fixed on the base, and the limiting block is arranged between the moving seat and the clamping frame. 7 . 7. The method for manufacturing an optical fiber according to claim 3, wherein the flame grinding device further comprises a third driving mechanism for driving the chuck to rotate.