CN204356231U - The docking facilities of a kind of preform and caudal peduncle - Google Patents

Abstract

The utility model relates to a butt joint device of an optical fiber preform rod and a tail handle. The device is used for butt joint of an optical fiber preform rod and a tail handle. Including workbench, blowtorch, blowtorch bracket, servo motor 1, chuck 1, servo motor 2, chuck 2, graphite roller, graphite roller bracket, compression cylinder, sliding plate 1, servo motor 3, sliding plate 2, servo motor 4 , sliding guide rail and control panel; a sliding guide rail is installed on the upper part of the workbench, and the output shaft of the servo motor 1 is equipped with a chuck 1, which is used for clamping the preform rod; the servo motor 3 is installed on the rear side of the sliding plate 1 ;The output shaft of the servo motor 2 is equipped with the chuck 2, and the chuck 2 is used to install the tail handle; the servo motor 4 is installed on the rear side of the sliding plate 2; the blow lamp bracket is equipped with a blow lamp; Roller bracket, graphite roller is installed on the front side of the graphite roller bracket, and a control panel is installed on the side of the workbench.

Description

A docking device for an optical fiber preform and a tail handle

technical field

The utility model patent relates to a docking device for an optical fiber preform and a tail handle, and the device is used for docking an optical fiber preform and a tail handle.

Background technique

The manufacture of optical fiber and optical fiber preform is basically carried out according to the following process: the core rod in powder state is deposited by axial vapor deposition method (VAD), and the core rod in glass state is formed by dehydroxylation vitrification; then it is extended into a thinner core rod of appropriate length Rods are further coated with powdered rods around the periphery of each mandrel, and dehydroxylated and vitrified again to form large-sized preformed rods.

In the manufacturing process of the optical fiber preform, the base material of the optical fiber preform needs a tail handle for support, so the butt joint between the base material of the optical fiber preform and the tail handle is very necessary. For example, in the above-mentioned process of outsourcing and depositing powdered rods, two tail handles must be connected to the two ends of the base material of the optical fiber preform to be clamped by chuck jaws; The ends should be extended as fully as possible, and both ends must also be connected to the tail handles for clamping by the claws and applying force to extend.

In recent years, in order to meet the requirements of improving the manufacturing efficiency of optical fiber preforms, the diameter of the base material of the preforms has become larger and larger, so the diameter of the butt joint of the preforms has also become larger. As the diameter of the butt joint becomes larger, the heat transfer becomes uneven, and the heating degree of the central position and the peripheral part of the end face of the butt joint will be different.

Relatively speaking, the peripheral part softens earlier and the surface tension is greater. Therefore, the peripheral part is about 1mm higher than the central part, and the center is concave. During the docking process, the air in the central part is sealed inside the docking position. If the extrusion force is slightly larger, the sealing gas will be squeezed out, and a relatively tight shape will be formed at the extrusion position. Big void. Both the air remaining in the docking position and being squeezed out have a great influence on the stress of the docking part, etc.

In the JP2005-145796 patent, the cutting angle θ at one end of the butt joint is controlled (θ satisfies 0.017≤tanθ≤0.176) to ensure that all bubbles are squeezed out during the butt joint process without residue; the rod diameter at both ends of the butt joint is required to be 35mm~55mm. But in practical application, it is very difficult to determine the cutting angle of the cylinder without cutting; on the other hand, the rod diameter range of the butt joint part of this patent is only 35mm~55mm, which becomes inapplicable under the trend of increasing rod diameter Furthermore, after practice, when there is a cutting angle at one end of the butt joint, although no air bubbles remain during the butt joint process, there are extruded protrusions and depressions, which affect the stress of the butt joint.

Contents of the invention

The purpose of this utility model is to provide a butt joint device between an optical fiber preform rod and a tail handle. The end face of the preform rod is cut in a direction approximately perpendicular to the axis, while the cut end face of the tail handle at the other end of the butt joint is at an angle of θ with the axis center. Use a blowtorch to burn and melt the two ends of the butt joint, and use a graphite roller to smooth the concave and convex parts after the butt joint is extruded for a certain distance.

A butt joint device between an optical fiber preform and a tail handle is realized through the following technologies:

A docking device for an optical fiber preform and a tail handle includes a workbench, a blowtorch, a blowtorch bracket, a servo motor 1, a chuck 1, a servo motor 2, a chuck 2, a graphite roller, a graphite roller bracket, a compression cylinder, and a sliding plate 1, Servo motor three, sliding plate two, servo motor four, sliding guide rail and control panel.

A sliding guide rail is installed on the upper part of the worktable. The sliding plate one is installed on the sliding guide rail at the left end of the workbench. The servo motor one is installed on the sliding plate one. The output shaft of the servo motor one is equipped with the chuck one. The chuck one is used for The preform rod is loaded into the card; the servo motor 3 is installed on the back side of the sliding plate 1, and the sliding plate 1 moves laterally on the sliding guide rail through the gear drive; the servo motor 2 is installed on the right end of the workbench, and the output shaft of the servo motor 2 is equipped with a card. Disc 2 and Chuck 2 are used to clamp the tail handle; Servo motor 4 is installed on the back side of sliding plate 2, and the sliding plate 2 moves laterally on the guide rail through gear transmission; A blowtorch bracket is installed in the middle of the front side of the workbench, and the blowtorch The blowtorch is installed on the bracket, and the blowtorch is connected to the hydrogen and oxygen sources respectively through the gas pipeline; the graphite roller bracket is installed in the middle of the back side of the workbench, the graphite roller bracket is installed on the front side, and the graphite roller bracket is installed on the back side. Compressed air cylinder , The compressed air cylinder can push the graphite roller to move back and forth, so that the graphite roller can contact and flatten the docking part. A control panel is installed on one side of the workbench, and the control panel is connected with the above-mentioned controllable components through a control line, and controls the above-mentioned components.

The first chuck and the second chuck have adjustable clamping diameters ranging from 0 to 200 mm.

The first servo motor, the second servo motor, the third servo motor and the fourth servo motor are respectively connected to the control panel installed on the workbench, and can respectively control the speed and direction of rotation of the servo motors.

The blowtorch is a metal single blowtorch, the combustion gas is hydrogen (H ₂ ), and the combustion-supporting gas is oxygen (O ₂ ), divided into internal and external oxygen.

The distance that the compressed air cylinder can push the graphite roller forward is 0-150mm.

The preform is a doped material mainly made of quartz.

The tail handle is made of quartz material.

A method for connecting an optical fiber preform and a tail handle is as follows:

Use a cutting machine to precisely cut the tail handle of the preform. The end face of the preform rod is cut perpendicular to the axis, and the cut end face of the tail handle at the other end of the butt joint is at an angle θ with the center line of the blowtorch; through the control panel operation, the servo motor three and the servo Motor 4 drives Chuck 1 and Chuck 2 to move on the slide rail through their respective gears, so that the edge of the preform rod and tail handle reaches the center line of the blowtorch, and servo motor 1 and Servo motor 2 control Chuck 1 and Chuck 2 through their respective gears At the same time, it rotates in the same direction at the same speed, and burns and melts the two ends of the butt joint with a blowtorch. The edge of the end surface of the preform forms a protrusion, while the center of the end surface of the preform forms a depression, and the edge of the end surface of the tail handle forms a smooth shape. Through the operation of the control panel, the servo motor 4 moves the tail handle distance D on the sliding guide rail through the gear transmission chuck 2 to squeeze. After extrusion, protrusions and depressions are formed on the docking part, and the compression cylinder pushes the graphite roller forward to contact the docking part. , smooth out the depressions and protrusions.

The range of the θ angle is 1°≤θ≤10°, which is converted into the cutting amount d and the extrusion distance D according to the triangular relationship.

The diameter range of the abutting end of the optical fiber preform rod and the tail handle is 20 mm to 100 mm.

For the burning, the premise is that the centerline of the torch flame is on the axis of the preform rod and the tail handle, and the butt ends of the preform rod and the tail handle are burned.

The timing of the extrusion is that the two ends of the butt joints are burned until they turn white, one end is fixed, and the other end is pressed against each other.

The smoothing is to use a graphite roller to wipe and press the concave-convex part of the docking position of both ends until the rod diameter of the docking part is uniform and there is no concave-convex.

The utility model has the advantages of a docking device between an optical fiber preform and a tail handle:

First, the implementation method is relatively simple, the angle is converted into the cutting amount d, and the extrusion amount is determined according to the cutting amount; the second is to add a graphite roller flattening device to ensure that the butt joint is smooth after flattening, without unevenness; third, it has a wide range of applications, The diameter range of the butt end is 20mm~100mm, which meets the requirements of the trend of large diameter of preformed rods.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a schematic diagram of a device for butt jointing of an optical fiber preform and a tail handle.

Fig. 2a is a schematic diagram of cutting an end face of an optical fiber preform and a tail handle before butt jointing.

Fig. 2b is a schematic diagram of the shape of the end surface of an optical fiber preform and tail handle after being burnt by a blowtorch.

Fig. 2c is a schematic diagram of the position of an optical fiber preform and tail handle after torch burning and before butt jointing.

Fig. 2d is a schematic diagram of the shape of an optical fiber preform and the tail handle after being burnt by a torch and then butt jointed and smoothed.

Fig. 2e is a schematic diagram of the shape of an optical fiber preform and a tail handle after being burnt by a blowtorch and smoothed after being butted.

Fig. 3 is a cross-sectional view of A-A of the butt joint in Fig. 2d.

Figure 4 is a B-B sectional view of the docking part in Figure 2e

In the figure: 1. Optical fiber preform; 2. Tail handle; 3. Blowtorch; 4. Horizontal central axis; 5. Blowtorch center line; 6. Blowtorch bracket; 7. Servo motor 1; Motor 2; 10. Chuck 2; 11. Cutting end face of preform rod; 12. Protrusion on edge of preform rod end face after burning; 13. Depression in center of preform rod end face after burning; 14. Graphite roller; 15. Graphite roller support; 16. Compression cylinder; 17. Workbench; 18. Control panel; 19. Sliding guide rail; 21. Tail handle cutting end face; 22. Depression on the edge of the end face after burning; 23 Gas escape during extrusion Direction; 24a, the depression formed in the docking part after extrusion; 24b, the depression in the docking part after extrusion is smoothed; 25a, the protrusion formed in the docking part after extrusion; 25b, the protrusion in the docking part after extrusion is smoothed; 26. Sliding plate one; 27. Servo motor three; 28. Sliding plate two; 29. Servo motor four.

Detailed ways

Referring to accompanying drawings 1 to 4, a butt joint device for an optical fiber preform and a tail handle includes a workbench 17, a blowtorch 3, a blowtorch bracket 6, a servo motor 1 7, a chuck 8, a servo motor 2 9, and a chuck 10 , graphite roller 14, graphite roller support 15, compression cylinder 16, slide plate one 26, servo motor three 27, slide plate two 28, servo motor four 29, slide guide rail 19 and control panel 18.

A sliding guide rail 19 is installed on the top of the workbench 17, a sliding plate-26 is installed on the sliding guide rail 19 at the left end of the workbench, a servo motor-7 is installed on the sliding plate-26, and a chuck is installed on the output shaft of the servo motor-7 One 8, the chuck one 8 is used for clamping the preform rod 1; the servo motor three 27 is installed on the rear side of the sliding plate one 26, and the sliding plate one 26 moves laterally on the sliding guide rail 19 through gear transmission; at the right end of the workbench 17 Servo motor two 9 is installed, and chuck two 10 is housed on the output shaft of servo motor two 9, and chuck two 10 is used for loading tail handle 2; Servo motor four 29 is installed on the rear side of sliding plate two 28, through gear Sliding plate two 28 laterally moves on guide rail 19; Blowtorch support 6 is installed on the front side middle part of workbench 17, and blowtorch 3 is housed on the blowtorch support 6, and blowtorch 3 is respectively connected to hydrogen by gas pipeline, and oxygen gas source is connected; Graphite roll support 15 is installed in the middle part of the rear side of platform 17, graphite roll 14 is installed on the front side of graphite roll support 15, and compression cylinder 16 is installed on the rear side of graphite roll support 15, and compression cylinder 16 can push graphite roll 14 to move back and forth, makes graphite roll Make contact with the mating area and press flat. A control panel 18 is installed on one side of the workbench 17, and the control panel 18 is connected with the above-mentioned controllable components through a control line, and controls the above-mentioned components.

The first chuck 8 and the second chuck 10 have adjustable clamping diameters ranging from 0 to 200mm.

Described servomotor 1 7, servomotor 2 9, servomotor 3 27 and servomotor 4 29 link to each other with the control panel 18 installed on the workbench 17 respectively, can control the rotating speed and the direction of rotation of servomotor respectively.

The blowtorch 3 is a metal single blowtorch, the combustion gas is hydrogen (H ₂ ), and the combustion-supporting gas is oxygen (O ₂ ), divided into internal and external oxygen.

The compression cylinder 16 can push the graphite roller 14 forward with a distance ranging from 0 mm to 150 mm.

The preform 1 is a doped material mainly made of quartz.

The tail handle 2 is made of quartz material.

A butt joint method of preform rod and tail handle is as follows:

Precisely cut the tail shank 2 of the preform with a cutting machine, the cutting end surface 11 of the preform rod is cut perpendicular to the axis 4, and the cutting end surface 21 of the other end of the butt joint is at an angle θ with the center line 5 of the blowtorch; operate through the control panel 18 , servo motor 3 27 and servo motor 4 29 respectively drive chuck 1 8 and chuck 2 10 to move on the sliding guide rail 19 through their respective gears, so that the edge of the preform and the tail handle reach the center line 5 of the blowtorch, servo motor 1 7 and servo Motor 2 9 controls chuck 1 8 and chuck 2 10 to rotate at the same speed and in the same direction through their respective gears, and burns and melts the two ends of the butt joint with blowtorch 3, forming a bulge on the edge 12 of the end face of preform 1, and preform 1 The center 13 of the end surface forms a depression, and the edge of the end surface of the tail shank 2 forms a smooth shape. Through the operation of the control panel 18, the servo motor 4 29 moves the tail handle 2 on the sliding guide rail 19 for a distance D through the gear transmission chuck 2 10 to squeeze, and after extrusion, a protrusion 25a and a depression 24a are formed at the docking position, and the compression cylinder 16 pushes The graphite roller advances and contacts the abutting portion, smoothing out the concave and convex portions to form 25b and 24b.

The range of the θ angle is 1°≤θ≤10°, which is converted into the cutting amount d and the extrusion distance D according to the triangular relationship.

The diameter range of the abutting end of the optical fiber preform rod and the tail handle is 20 mm to 100 mm.

For the burning, the premise is that the centerline of the torch flame is on the axis of the preform rod and the tail handle, and the butt ends of the preform rod and the tail handle are burned.

Said D is 2d/3.

The timing of the extrusion is that the two ends of the butt joints are burned until they turn white, one end is fixed, and the other end is pressed against each other.

The utility model will be further described below in conjunction with embodiment:

Example 1: Axial vapor deposition method (VAD) is used to deposit a powder core rod, and a preform rod with a diameter of 80 mm is formed after dehydroxylation vitrification. The utility model is used to connect a preform rod with a diameter of 80 mm to a preform rod with a diameter of 80 mm. The tail handle is convenient for subsequent production.

In this embodiment, θ is 5°, d=80*tan5°=7.00mm, D=2d/3=4.67mm, according to Figure 2(a), use a cutting machine to cut the preform 1, so that the preform cut end face 11 and The axis 4 is vertical; use a cutting machine to cut the tail handle 2 so that the end face 21 forms an angle of 5° with the centerline 5 of the blowtorch.

The preform rod 1 and the tail handle 2 start to rotate at a speed of 10 rpm, the blowtorch 3 is ignited and burnt, the _H2 flow rate is 300 L/min, the internal _O2 flow rate is 50 L/min, and the external _O2 flow rate is 100 L/min. After burning for 8 minutes, start to move the preform master rod 1 and the tail handle 2 at the same time, so that the cut end face 11 of the two butted preform rods and the cut end face 21 of the tail handle are almost in contact, as shown in Figure 2(c).

Fix the preform rod 1, move the tail handle 2 for extrusion, and the moving distance is D=4.67mm. Use a graphite roller to wipe and press the butt joint until the rod diameter of the butt joint is smooth and uniform.

There are no visible bubbles at the butt joint, and it has been produced and used in the downstream process. There is no abnormality in strength and out-of-roundness, which meets the production requirements.

Embodiment 2: Axial vapor deposition method (VAD) is used to deposit a powdery mandrel, and a preformed rod with a diameter of 50 mm is formed after dehydroxylation vitrification. The utility model is used to connect a preformed rod with a diameter of 50 mm to a 50 mm diameter The tail handle is convenient for subsequent production.

In this embodiment, θ is 8°, d=50*tan8°=7.03mm, D=2d/3=4.69mm, according to Figure 2(a), use a cutting machine to cut the preform 1, so that the preform cut end face 11 and The axis 4 is vertical; use a cutting machine to cut the tail handle 2 so that the cut end face 21 of the tail handle forms an 8° angle with the centerline 5 of the blowtorch.

The preform rod 1 and the tail handle 2 start to rotate at a speed of 10 rpm, the blowtorch 3 is ignited and burnt, the flow of H ₂ is 250 L/min, the flow of internal O ₂ is 40 L/min, and the flow of external O ₂ is 85 L/min. After burning for 6 minutes, start to move the preform master rod 1 and the tail handle 2 at the same time, so that the cut end face 11 of the two butted preform rods and the cut end face 21 of the tail handle are almost in contact, as shown in Figure 2(c).

Fix the preform rod 1, move the tail handle 2 to extrude, and the moving distance is D=4.69mm. Use a graphite roller to wipe and press the butt joint until the rod diameter of the butt joint is smooth and uniform.

There are no visible bubbles at the butt joint, and it has been produced and used in the downstream process. There is no abnormality in strength and out-of-roundness, which meets the production requirements.

Claims (5)

1. A docking device for an optical fiber preform and a tail handle, characterized in that: it comprises a workbench, a blowtorch, a blowtorch support, a servo motor one, a chuck one, a servo motor two, a chuck two, a graphite roller, a graphite roller support, Compression cylinder, sliding plate 1, servo motor 3, sliding plate 2, servo motor 4, sliding guide rail and control panel; A sliding guide rail is installed on the upper part of the worktable. The sliding plate one is installed on the sliding guide rail at the left end of the workbench. The servo motor one is installed on the sliding plate one. The output shaft of the servo motor one is equipped with the chuck one. The chuck one is used for The preform rod is loaded into the card; the servo motor 3 is installed on the back side of the sliding plate 1, and the sliding plate 1 moves laterally on the sliding guide rail through the gear drive; the servo motor 2 is installed on the right end of the workbench, and the output shaft of the servo motor 2 is equipped with a card. Disc 2 and Chuck 2 are used to clamp the tail handle; Servo motor 4 is installed on the back side of sliding plate 2, and the sliding plate 2 moves laterally on the guide rail through gear transmission; A blowtorch bracket is installed in the middle of the front side of the workbench, and the blowtorch The blowtorch is installed on the bracket, and the blowtorch is connected to the hydrogen and oxygen sources respectively through the gas pipeline; the graphite roller bracket is installed in the middle of the back side of the workbench, the graphite roller bracket is installed on the front side, and the graphite roller bracket is installed on the back side. Compressed air cylinder , The compressed air cylinder can push the graphite roller to move back and forth, so that the graphite roller contacts and flattens the docking part; a control panel is installed on one side of the workbench. 2 . The device for docking an optical fiber preform and a tail handle according to claim 1 , wherein the clamping diameter of the first chuck and the second chuck is adjustable within a range of 0 to 200 mm. 3 . 3. A butt joint device between an optical fiber preform and a tail handle according to claim 1, characterized in that: said servo motor 1, servo motor 2, servo motor 3 and servo motor 4 are respectively connected to the control device installed on the workbench The panel is connected to control the speed and rotation direction of the servo motor separately. 4. The butt joint device between optical fiber preform and tail handle according to claim 1, characterized in that: the blowtorch is a metal single blowtorch, the combustion gas is hydrogen, and the combustion-supporting gas is oxygen, which is divided into inner and outer oxygen. 5 . The device for connecting an optical fiber preform to a tail handle according to claim 1 , wherein the compressed air cylinder can push the graphite roller forward with a distance ranging from 0 mm to 150 mm. 6 .