CN113511806A - Machining method of mandrel - Google Patents
Machining method of mandrel Download PDFInfo
- Publication number
- CN113511806A CN113511806A CN202110750078.5A CN202110750078A CN113511806A CN 113511806 A CN113511806 A CN 113511806A CN 202110750078 A CN202110750078 A CN 202110750078A CN 113511806 A CN113511806 A CN 113511806A
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- China
- Prior art keywords
- reaction kettle
- mandrel
- core rod
- dust
- smooth
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/0148—Means for heating preforms during or immediately prior to deposition
Abstract
The application discloses a machining method of a core rod, which comprises the following steps: 1) a heating structure is arranged on the inner wall of the reaction kettle; 2) before the deposition reaction, carrying out dust removal operation on the inner wall of the reaction kettle; 3) a smooth conical cover is detachably arranged at the top of the reaction kettle; 4) controlling the heating structure to work, preheating the side wall of the reaction kettle, then carrying out deposition reaction to prepare a loose core rod body, and enabling the prepared loose core rod body to pass through the hollow part of the conical cover; 5) and drying and sintering the core rod loose body to obtain the core rod. According to the machining method, the quality of the loose core rod body can be effectively improved by arranging the heating structure and blocking the smooth conical cover.
Description
Technical Field
The invention relates to the field of optical fiber preforms, in particular to a processing method of a core rod.
Background
When the core rod is processed, firstly, a deposition reaction is carried out through a VAD reaction kettle to obtain a core rod loose body, and then the core rod loose body is dried and sintered to obtain the core rod.
During the deposition reaction, dust attached to the inner wall of the reaction kettle can cause the dust to fall on the loose body in the deposition process and finally become bubbles, and even larger powder blocks fall on the loose body, so that the loose body can be cracked and scrapped.
Disclosure of Invention
The invention provides a method for processing a core rod, aiming at the problems.
The technical scheme adopted by the invention is as follows:
a machining method of a core rod comprises the following steps:
1) a heating structure is arranged on the inner wall of the reaction kettle;
2) before the deposition reaction, carrying out dust removal operation on the inner wall of the reaction kettle;
3) a smooth conical cover is detachably arranged at the top of the reaction kettle;
4) controlling the heating structure to work, preheating the side wall of the reaction kettle, then carrying out deposition reaction to prepare a loose core rod body, and enabling the prepared loose core rod body to pass through the hollow part of the conical cover;
5) and drying and sintering the core rod loose body to obtain the core rod.
According to the processing method, the heating structure is arranged in the reaction kettle, so that preheating and heat preservation effects can be achieved, and moisture on the inner surface of the reaction kettle can be fully volatilized by the heating structure, so that the adhesion of dust is reduced; through the smooth conical cover of top installation at reation kettle, can effectively protect the loose body of plug, smooth conical cover can prevent that the dust from piling up, and the dust that the reation kettle roof dropped is difficult for falling into in the loose body of plug through blockking of smooth conical cover. The method can effectively improve the quality of the loose body of the core rod.
In one embodiment of the present invention, the steps 1) to 4) are implemented by deposition equipment, the deposition equipment includes a reaction kettle, one side of the reaction kettle is provided with an air supply mechanism, the other side of the reaction kettle is provided with an exhaust tube, the reaction kettle is further provided with a baffle plate, the baffle plate is provided with a suction port, an end of the exhaust tube is fixed to the suction port, and the side wall of the exhaust tube is provided with a plurality of small holes;
the inside wall of reation kettle is provided with heating structure, and reation kettle inboard top demountable installation has smooth toper cover, the baffle is located smooth toper cover under.
The lateral wall of exhaust tube is provided with a plurality of apertures, and the aperture is for pumping the mouth, and the size is less, is a relative probability, for the existence of baffle, sets up the aperture and can not lead to the fact the influence to reation kettle inside gas flow. The utility model provides a reation kettle, baffle are located smooth toper cover under, and the dust of covering the landing from smooth toper like this can fall into the exhaust tube place side, siphons away through the aperture of exhaust tube, effectively reduces the probability that falls into the loose body of plug.
The smooth conical cover is detachably mounted at the top of the inner side of the reaction kettle, and the smooth conical cover is convenient to detach regularly for cleaning, so that the surface of the smooth conical cover is smooth.
In one embodiment of the present invention, the inner side wall of the reaction kettle is provided with a vibration element, and when the dust removal operation is performed, the vibration element works to pump out the dust scattered in the reaction kettle from the reaction kettle through the exhaust pipe.
The vibrating element works during the ash removal operation, does not work during the deposition process, and can enable dust on the inner wall of the reaction kettle to fall off and then be sucked away through the suction pipe.
In one embodiment of the invention, the top end of the reaction kettle is provided with an automatic clamping device, and the smooth conical cover comprises a conical part with a small upper part and a large lower part, a hollow connecting part positioned at the upper end of the conical part and a cylindrical part positioned at the lower end of the conical part; the automatic clamping device is used for fixing the hollow connecting part.
The automatic clamping device can be used for rapidly dismounting the smooth conical cover, and during actual application, the automatic clamping device can adopt various existing pneumatic or electric structures, and the outer side wall of the hollow connecting part is clamped through the clamping assembly to realize fixation.
In one embodiment of the invention, the deposition equipment further comprises a multi-degree-of-freedom mechanical gripper arranged on the outer side of the reaction kettle and a transfer tool used for assembling and disassembling the smooth conical cover, the transfer tool comprises an annular body and a connecting rod fixed with the annular body, an annular groove is formed in the upper end surface of the annular body and used for embedding a cylindrical part of the smooth conical cover, and the multi-degree-of-freedom mechanical gripper drives the transfer tool to move by clamping the connecting rod.
Through the cooperation of the multi-degree-of-freedom mechanical gripper and the transfer tool, the automatic clamping device is combined, the smooth conical cover can be automatically disassembled and installed, and the labor intensity of workers can be effectively reduced.
In one embodiment of the present invention, the deposition apparatus further includes a dust removing mechanism, and the dust removing mechanism includes:
the multi-freedom-degree mechanical gripper comprises a hollow base rod, wherein one end of the base rod is a multi-freedom-degree mechanical gripper clamping end, and the other end of the base rod is a working end;
the brush column is arranged at the working end of the base rod, and the outer side wall and the end face of the brush column are both fixed with bristles;
and the driving motor is fixed on the base rod, an output shaft of the driving motor is fixed with the brush column, and the driving motor is used for driving the brush column to rotate.
The outer side wall and the end face of the brush column are both fixed with brush bristles, so that the brush bristles can be conveniently and efficiently contacted with the inner side wall of the reaction kettle, and deposited dust is brushed away. Through the cooperation of the multi-degree-of-freedom mechanical gripper and the dust removal mechanism, automatic dust removal can be realized, and the labor intensity is effectively reduced.
In one embodiment of the present invention, the dust removing mechanism further includes:
the buffer cavity is arranged inside the base rod;
the plurality of ash suction channels are arranged in the base rod, one ends of the ash suction channels are aligned with the bristles, and the other ends of the ash suction channels are communicated with the buffer cavity;
one end of the air suction pipe penetrates through the base rod to be communicated with the buffer cavity, and the other end of the air suction pipe is connected with a negative pressure device.
In one embodiment of the present invention, a port of the dust suction passage for sucking dust has a flaring structure.
In one embodiment of the present invention, the negative pressure device is a vacuum cleaner.
In one embodiment of the present invention, the heating structure is a heating wire or a heating coil.
The invention has the beneficial effects that: according to the processing method, the heating structure is arranged in the reaction kettle, so that preheating and heat preservation effects can be achieved, and moisture on the inner surface of the reaction kettle can be fully volatilized by the heating structure, so that the adhesion of dust is reduced; through the smooth conical cover of top installation at reation kettle, can effectively protect the loose body of plug, smooth conical cover can prevent that the dust from piling up, and the dust that the reation kettle roof dropped is difficult for falling into in the loose body of plug through blockking of smooth conical cover. The method can effectively improve the quality of the loose body of the core rod.
Description of the drawings:
FIG. 1 is a schematic view of a reaction kettle;
FIG. 2 is a schematic view of a smooth conical hood;
FIG. 3 is a schematic view of a transfer tool;
FIG. 4 is a schematic view of a smooth conical hood on a transfer tool;
FIG. 5 is a schematic structural view of a dust removing mechanism;
FIG. 6 is a front view of the dust removal mechanism;
fig. 7 is a sectional view a-a of fig. 6.
The figures are numbered:
1. a reaction kettle; 2. a smooth conical cover; 3. a loose core rod body; 4. a wind supplementing mechanism; 5. an air exhaust pipe; 6. a baffle plate; 7. a small hole; 8. a tapered portion; 9. a hollow connecting portion; 10. a cylindrical portion; 11. transferring the tool; 12. an annular body; 13. a connecting rod; 14. an annular groove; 15. a dust removal mechanism; 16. a base shaft; 17. brushing the column; 18. brushing; 19. a drive motor; 20. a buffer chamber; 21. an ash suction channel; 22. an air intake duct; 23. a flaring structure; 24. a suction port; 25. a multi-degree-of-freedom mechanical gripper clamping end; 26. and a working end.
The specific implementation mode is as follows:
the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, a method for machining a core rod includes the following steps:
1) a heating structure is arranged on the inner wall of the reaction kettle 1;
2) before the deposition reaction, the inner wall of the reaction kettle 1 is subjected to dust removal operation;
3) a smooth conical cover 2 is detachably arranged at the top of the reaction kettle 1;
4) controlling the heating structure to work, preheating the side wall of the reaction kettle 1, then carrying out deposition reaction to prepare a mandrel loose body 3, and enabling the prepared mandrel loose body 3 to pass through the hollow part of the conical cover;
5) the core rod loose body 3 is dried and sintered to obtain a core rod.
According to the processing method, the heating structure is arranged in the reaction kettle 1, so that preheating and heat preservation effects can be achieved, and the heating structure can fully volatilize water vapor on the inner surface of the reaction kettle 1, so that the adhesion of dust is reduced; through the smooth conical cover 2 of top installation at reation kettle 1, can effectively protect the loose body 3 of plug, smooth conical cover can prevent that the dust from piling up, and the dust that reation kettle 1 roof dropped blocks through smooth conical cover 2, is difficult for falling into in the loose body of plug. The method can effectively improve the quality of the loose core rod body 3.
As shown in fig. 1, in this embodiment, steps 1) to 4) are implemented by deposition equipment, where the deposition equipment includes a reaction kettle 1, one side of the reaction kettle 1 is provided with an air supply mechanism 4, the other side of the reaction kettle 1 is provided with an air extraction pipe 5, a baffle 6 is further installed in the reaction kettle 1, the baffle 6 is provided with an air extraction port 24, an end of the air extraction pipe 5 is fixed to the air extraction port 24, and a side wall of the air extraction pipe 5 is provided with a plurality of small holes 7;
the inside wall of reation kettle 1 is provided with heating structure (omit not drawn in the figure), and reation kettle 1 inboard top demountable installation has smooth conical cover 2, and baffle 6 is located smooth conical cover 2 under.
The side wall of the extraction pipe 5 is provided with a plurality of small holes 7, and the small holes 7 are relatively small in size relative to the suction port 24, so that the small holes 7 do not influence the air flow in the reaction kettle 1 due to the existence of the baffle 6. The utility model provides a reation kettle 1, baffle 6 are located smooth toper cover 2 under, and the dust of following the landing of smooth toper cover 2 upper surface can fall into exhaust tube 5 place side like this, siphons away through the aperture 7 of exhaust tube 5, effectively reduces the probability that falls into core rod loose body 3.
Smooth conical cover 2 is detachably mounted at the top of the inner side of reaction kettle 1, and smooth conical cover 2 is convenient to detach regularly for cleaning, so that the smooth conical cover 2 is ensured to be smooth in surface.
In this embodiment, a vibration member (not shown) is installed on the inner side wall of the reaction vessel 1, and when the dust removal operation is performed, the vibration member operates to extract the dust scattered in the reaction vessel 1 out of the reaction vessel 1 through the exhaust pipe 5.
The vibration element works during the ash removal operation, does not work during the deposition process, and can enable dust on the inner wall of the reaction kettle 1 to fall off and then be sucked away through the exhaust pipe 5.
As shown in fig. 2, in the present embodiment, an automatic clamping device (not shown) is installed at the top end of the reaction vessel 1, and the smooth conical cover 2 includes a conical portion 8 with a small top and a large bottom, a hollow connecting portion 9 located at the upper end of the conical portion 8, and a cylindrical portion 10 located at the lower end of the conical portion 8; the automatic clamping device is used for fixing the hollow connecting part 9.
The automatic clamping device can be used for rapidly assembling and disassembling the smooth conical cover 2, and during actual application, the automatic clamping device can adopt various existing pneumatic or electric structures, and the outer side wall of the hollow connecting part 9 is clamped through the clamping component to realize fixation.
As shown in fig. 3 and 4, in the present embodiment, the deposition apparatus further includes a multi-degree-of-freedom mechanical gripper (not shown in the drawings) disposed outside the reaction kettle 1 and a transfer tool 11 for mounting and dismounting the smooth tapered cover 2, the transfer tool 11 includes an annular body 12 and a connecting rod 13 fixed to the annular body 12, an upper end surface of the annular body 12 has an annular groove 14, the annular groove 14 is used for the cylindrical portion 10 of the smooth tapered cover 2 to be inserted, and the multi-degree-of-freedom mechanical gripper drives the transfer tool 11 to move by clamping the connecting rod 13.
Through the cooperation of the multi-degree-of-freedom mechanical gripper and the transfer tool 11 and the combination of the automatic clamping device, the smooth conical cover 2 can be automatically disassembled and installed, and the labor intensity of workers can be effectively reduced. The multi-degree-of-freedom mechanical gripper can adopt the existing mechanical hand equipment.
As shown in fig. 5, 6 and 7, in the present embodiment, the deposition apparatus further includes a dust removing mechanism 15, and the dust removing mechanism 15 includes:
the device comprises a hollow base rod 16, wherein one end of the base rod 16 is a multi-degree-of-freedom mechanical gripper clamping end 25, and the other end of the base rod is a working end 26;
the brush column 17 is arranged at the working end 26 of the base rod 16, and the outer side wall and the end surface of the brush column 17 are both fixed with bristles 18;
the driving motor 19 is fixed on the base rod 16, an output shaft of the driving motor 19 is fixed with the brush column 17, and the driving motor 19 is used for driving the brush column 17 to rotate.
The brush bristles 18 are fixed on the outer side wall and the end face of the brush column 17, so that the brush bristles 18 can be conveniently and efficiently contacted with the inner side wall of the reaction kettle 1, and deposited dust is brushed away. Through the cooperation of the multi-degree-of-freedom mechanical gripper and the dust removal mechanism 15, automatic dust removal can be realized, and the labor intensity is effectively reduced.
As shown in fig. 7, in the present embodiment, the dust removing mechanism 15 further includes:
a buffer chamber 20 disposed inside the base shaft 16;
a plurality of ash suction channels 21 arranged in the base rod 16, wherein one end of each ash suction channel 21 is aligned with the bristles 18, and the other end of each ash suction channel 21 is communicated with the buffer cavity 20;
and one end of the air suction pipe 22 penetrates through the base rod 16 to be communicated with the buffer cavity 20, and the other end of the air suction pipe is connected with a negative pressure device.
In this embodiment, as shown in fig. 7, the dust suction passage has a flared structure 23 at its end for sucking dust.
In actual use, the negative pressure device can be a dust collector. In practical application, the heating structure can be a heating wire or a heating coil.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings can be directly or indirectly applied to other related technical fields and are included in the scope of the present invention.
Claims (10)
1. A machining method of a core rod is characterized by comprising the following steps:
1) a heating structure is arranged on the inner wall of the reaction kettle;
2) before the deposition reaction, carrying out dust removal operation on the inner wall of the reaction kettle;
3) a smooth conical cover is detachably arranged at the top of the reaction kettle;
4) controlling the heating structure to work, preheating the side wall of the reaction kettle, then carrying out deposition reaction to prepare a loose core rod body, and enabling the prepared loose core rod body to pass through the hollow part of the conical cover;
5) and drying and sintering the core rod loose body to obtain the core rod.
2. The mandrel processing method according to claim 1, wherein the steps 1) to 4) are performed by deposition equipment, the deposition equipment comprises a reaction kettle, one side of the reaction kettle is provided with an air supply mechanism, the other side of the reaction kettle is provided with an exhaust pipe, a baffle is further arranged in the reaction kettle, the baffle is provided with a suction port, the end part of the exhaust pipe is fixed with the suction port, and the side wall of the exhaust pipe is provided with a plurality of small holes;
the inside wall of reation kettle is provided with heating structure, and reation kettle inboard top demountable installation has smooth toper cover, the baffle is located smooth toper cover under.
3. The mandrel processing method according to claim 2, wherein a vibration member is installed on an inner side wall of the reaction vessel, and the vibration member operates to pull out dust scattered into the reaction vessel through the exhaust pipe out of the reaction vessel during the dust removal operation.
4. The mandrel processing method according to claim 2, wherein an automatic clamping device is installed at the top end of the reaction vessel, and the smooth conical cover comprises a conical part with a small upper part and a large lower part, a hollow connecting part positioned at the upper end of the conical part, and a cylindrical part positioned at the lower end of the conical part; the automatic clamping device is used for fixing the hollow connecting part.
5. The mandrel machining method according to claim 4, wherein the deposition equipment further comprises a multi-degree-of-freedom mechanical gripper arranged outside the reaction kettle and a transfer tool for assembling and disassembling the smooth conical cover, the transfer tool comprises an annular body and a connecting rod fixed with the annular body, an annular groove is formed in the upper end face of the annular body and used for being embedded into a cylindrical part of the smooth conical cover, and the multi-degree-of-freedom mechanical gripper drives the transfer tool to move by clamping the connecting rod.
6. The method for machining a mandrel as claimed in claim 5 wherein the deposition apparatus further comprises a dust removal mechanism, said dust removal mechanism comprising:
the multi-freedom-degree mechanical gripper comprises a hollow base rod, wherein one end of the base rod is a multi-freedom-degree mechanical gripper clamping end, and the other end of the base rod is a working end;
the brush column is arranged at the working end of the base rod, and the outer side wall and the end face of the brush column are both fixed with bristles;
and the driving motor is fixed on the base rod, an output shaft of the driving motor is fixed with the brush column, and the driving motor is used for driving the brush column to rotate.
7. The mandrel machining method according to claim 6, wherein the dust removing mechanism further comprises:
the buffer cavity is arranged inside the base rod;
the plurality of ash suction channels are arranged in the base rod, one ends of the ash suction channels are aligned with the bristles, and the other ends of the ash suction channels are communicated with the buffer cavity;
one end of the air suction pipe penetrates through the base rod to be communicated with the buffer cavity, and the other end of the air suction pipe is connected with a negative pressure device.
8. The mandrel machining method according to claim 7, wherein a port of the dust suction passage for sucking dust has a flare structure.
9. The mandrel bar machining method according to claim 7, wherein the negative pressure device is a vacuum cleaner.
10. The method of machining a mandrel as claimed in claim 2 wherein said heating structure is a heating wire or a heating coil.
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| CN202110750078.5A CN113511806B (en) | 2021-07-02 | 2021-07-02 | Machining method of mandrel |
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| CN202110750078.5A CN113511806B (en) | 2021-07-02 | 2021-07-02 | Machining method of mandrel |
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| CN113511806B CN113511806B (en) | 2023-03-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114455827A (en) * | 2022-01-13 | 2022-05-10 | 富通集团有限公司 | Method for processing optical fiber preform and optical fiber preform |
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| CN110342809A (en) * | 2019-07-29 | 2019-10-18 | 富通集团有限公司 | A kind of manufacturing process of prefabricated rods |
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| CN112777929A (en) * | 2021-03-29 | 2021-05-11 | 浙江富通光纤技术有限公司 | Preform deposition method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114455827A (en) * | 2022-01-13 | 2022-05-10 | 富通集团有限公司 | Method for processing optical fiber preform and optical fiber preform |
| CN114455827B (en) * | 2022-01-13 | 2023-06-16 | 富通集团有限公司 | Optical fiber preform processing method and optical fiber preform |
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