CN111943501B - Method for vertical automatic drawing of optical fiber without damage - Google Patents
Method for vertical automatic drawing of optical fiber without damage Download PDFInfo
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- CN111943501B CN111943501B CN202010799024.3A CN202010799024A CN111943501B CN 111943501 B CN111943501 B CN 111943501B CN 202010799024 A CN202010799024 A CN 202010799024A CN 111943501 B CN111943501 B CN 111943501B
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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
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
- C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
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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
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
- C03B37/0253—Controlling or regulating
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2205/00—Fibre drawing or extruding details
- C03B2205/40—Monitoring or regulating the draw tension or draw rate
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Abstract
The invention discloses a method for non-destructive vertical automatic drawing of optical fibers, which comprises the steps that first and second electric fingers are respectively positioned at the top ends of respective strokes when the method is started, a first transmission sliding table is accelerated downwards and starts the first electric finger to clamp an optical fiber wire when the method is started, the first electric finger releases a clamping jaw when the first transmission sliding table runs to a terminal point, meanwhile, a second transmission sliding table is accelerated downwards and starts the second electric finger to clamp the optical fiber wire to draw the optical fiber wire downwards, and at the moment, the first transmission sliding table moves to the top end of a sliding guide rail quickly; when the second electric finger runs to the end point of the wire drawing length L, the second electric finger is loosened, the first transmission sliding table is started to run downwards in an accelerated mode and start the first electric finger to automatically draw wires, and then the second transmission sliding table starts to move quickly to the top end of the stroke to wait for the next action to be repeated. The invention reduces the surface contact and the skin layer damage of the optical fiber wire by a nondestructive automatic wire drawing method, and improves the surface quality and the wire diameter stability of the optical fiber wire drawing.
Description
Technical Field
The invention relates to the technical field of optical fiber manufacturing and processing, in particular to a method for vertical automatic drawing of optical fibers without damage.
Background
The optical fiber image transmission element comprises an optical fiber panel, an optical fiber image inverter, an optical fiber light cone, an optical fiber image transmission bundle, a microchannel plate and the like, is a photoelectric imaging element with excellent performance, and has the characteristics of simple structure, small volume, light weight, high resolution, large numerical aperture, small interstage coupling loss, clear and real image transmission, high light transmission efficiency, optical zero thickness in image transmission, capability of improving marginal image quality and the like. The optical fiber image transmission element is widely applied to various cathode ray tubes, image pick-up tubes, charge-coupled Device (CCD) coupling, medical instrument display screens, high-definition television imaging and other instruments and equipment needing image transmission in the fields of military affairs, criminal investigation, night vision, aerospace, medical treatment and the like, and is a high-tech top product in the photoelectronic industry of the century.
The optical fiber image transmission element is a hard optical fiber image transmission element which is prepared by matching and combining a high-refractive-index glass rod and a low-refractive-index glass tube, heating and softening the optical fiber image transmission element at high temperature in a heating furnace, then manufacturing optical fiber yarns with unit fiber yarn diameters smaller than 6 mu m through processes of single yarn drawing, primary multi-yarn drawing, secondary multi-yarn drawing and the like, then closely stacking and arranging thousands of optical fibers with unit fiber yarn diameters smaller than 6 mu m, then performing hot melt forming, and then performing torsion forming or drawing forming to obtain the image transmission.
Each optical fiber in the optical fiber image transmission element has good optical insulation, so that each optical fiber can independently transmit light and transmit images without being influenced by other adjacent optical fibers. The optical fiber image transmission element is mainly used in the instruments and equipment needing image transmission, such as cathode ray tubes, video cameras, image intensifiers and the like, so that the requirements on the manufacturing process of products are extremely high, in particular to the drawing process of optical fiber yarns, which is a key process procedure in the preparation process of optical fiber products. The difference of optical fiber drawing processes determines the different wire diameter sizes of optical fiber products, the drawing process of optical fiber determines the quality indexes of the optical fiber wire diameter size, the verticality, the surface quality, the twisting degree, the ovality and the like of the optical fiber products, the wire drawing mechanism of the optical fiber wire is a key device and a device in the drawing process of the optical fiber wire, and the stability and the wire drawing precision of the device are directly related to the dimensional stability of the optical fiber wire diameter and the stability of the surface quality of the wire diameter. Especially for preparing the optical fiber filament of the hard optical fiber image transmission element, the process of single filament drawing, primary multifilament drawing and secondary multifilament drawing is needed. The surface of the secondary multifilament is a serrated surface formed by combining a plurality of optical fibers after being arranged, after the composite arrangement and drawing for a plurality of times, the number of teeth of the serrations on the surface of the optical fibers is multiplied along with the arrangement times, the thickness of the cortex of the secondary multifilament is thinner and thinner, the thickness of the surface cortex glass is as thin as 0.2-0.3 mu m, the cortex of the optical fibers is damaged by slight touch and friction, and the optical fibers are caused to leak light, so that the prepared optical fiber image transmission element generates 'spot' or 'grid' defects inside the optical fiber image transmission element, and the production quality and the product qualification rate of the optical fiber image transmission element are greatly reduced.
The drawing system is an important control system in the drawing process of the optical fiber and comprises a plurality of aspects, and the stability and the accuracy of the system are directly related to a plurality of performance indexes and qualified rates of the optical fiber. At present, the drawing device of the optical fiber drawing machine mainly adopts two modes of wheel drawing or holding drawing. The wheel drawing mainly realizes the traction drawing of the optical fiber wire by the rotation friction of the rubber wire drawing wheel, the whole-process contact type friction force is applied to the surface of the optical fiber wire and the rubber surface of the wire drawing wheel in the drawing process to generate the pull-down effect, the surface of the optical fiber wire is easy to damage due to the friction contact process, and when the wire drawing temperature is higher, the surface of the rubber wire drawing wheel is easy to scald, so that the surface of the optical fiber wire is polluted by impurities or foreign matters, and the surface quality of the optical fiber wire is reduced; when the drawing temperature is low, the optical fiber is easy to slip with the rubber drawing wheel, so that normal drawing can not be realized, or the surface of the optical fiber is worn by skin glass and the like. The holding and pulling mode mainly clamps and pulls the optical fiber wire by a rubber pad on a synchronous belt, the problems of slipping of the optical fiber wire, wire twisting or uneven wire drawing diameter and the like in the drawing process of the optical fiber wire are easily caused, the whole wire drawing process is frequently required to be intervened by manual operation, the problems of damage, colloid particle impurities adhesion or poor verticality and concentricity of the drawn optical fiber wire are easily caused on the surface of the optical fiber wire, the wire drawing quality of the optical fiber wire is reduced, spots are generated inside a prepared optical fiber image transmission element, and the whole product is easily scrapped.
Disclosure of Invention
The invention provides a method for non-damage vertical automatic drawing of optical fibers, which aims to solve the defects in the prior art and improve the surface quality of optical fiber yarns and reduce the surface defects of the optical fiber yarns.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method for vertical automatic drawing of optical fiber without damage is characterized by comprising the following steps:
initial preparation: the first electric finger is positioned at the top end of the stroke of the upper half part of the sliding guide rail, the second electric finger is positioned at the top end of the stroke of the lower half part of the sliding guide rail, the sliding guide rail is divided into the upper half part and the lower half part by a limiting block, and the first electric finger and the second electric finger are in an opening state; manually drawing a drawing mother rod stub bar of the optical fiber wire to be drawn to sequentially pass through a first electric finger and a second electric finger, and adjusting and positioning the optical fiber wire to be drawn to be positioned at the central positions of the two electric fingers through a laser positioning device before the drawing operation is prepared;
the first step is as follows: starting a first transmission sliding table connected with a first electric finger, wherein the first transmission sliding table runs downwards at the upper half part of the sliding guide rail at an accelerated speed, when the first transmission sliding table reaches a set wire drawing speed V, the first electric finger is started to clamp the optical fiber wire, the first electric finger starts to automatically draw the wire downwards at a constant speed according to the set wire drawing speed V, and at the moment, a second electric finger stands still for waiting;
the second step is that: when the first electric finger runs to the end position of the set wire drawing length L, the second transmission sliding table connected with the second electric finger is started to run downwards at the lower half part of the sliding guide rail at an accelerated speed, when the second transmission sliding table reaches the set wire drawing speed V, the second electric finger is started to clamp the optical fiber wire to automatically draw the optical fiber wire downwards at a constant speed according to the set wire drawing speed V, and when the second electric finger clamps the optical fiber wire, the first electric finger releases the clamping jaw and opens the electric finger;
the third step: when the second electric finger clamps the optical fiber filaments to automatically draw the optical fiber filaments downwards at a constant speed, the first transmission sliding table connected with the first electric finger starts to move upwards at the upper half part of the sliding guide rail, quickly moves to the top end of the sliding guide rail and waits for the next action;
the fourth step: when the second electric finger runs to reach the end point of the set wire drawing length L, simultaneously starting a first transmission sliding table connected with the first electric finger to start to downwards accelerate;
the fifth step: when the speed of the first transmission sliding table reaches a set wire drawing speed V, starting a first electric finger to clamp the optical fiber wire, starting automatic uniform wire drawing according to the set wire drawing speed V, simultaneously loosening the optical fiber wire by a second electric finger and opening the optical fiber wire, then starting the second transmission sliding table to move upwards at the lower half part of the sliding guide rail, quickly moving to the lower end of the limiting block, and waiting for the next action;
repeating the action: and repeating the actions of the first step to the fifth step.
The drawing speed V is 20-70 mm per second.
The drawing speed V was 50mm per second.
The wire drawing distance L is 400-800mm.
The wire drawing distance L is 600mm.
Furthermore, the ovality of the drawn optical fiber is less than 2.0 μm, the diameter of the drawn optical fiber is 0.5-3.5 mm, and the tolerance of the diameter of the drawn fiber is less than +/-5.0 μm.
The sliding guide rail is 1 guide rail, and the length of the sliding guide rail is 1200-2000mm.
The length of the sliding guide rail is 1600mm.
Further, when the optical fiber yarn of a desired length is obtained, the optical fiber yarn is cut by an automatic cutter.
Compared with the prior art, the invention has the beneficial effects that:
the invention realizes that the drawing process of the optical fiber is more stable, and the phenomena of wire twisting and slipping in the drawing process can not occur, the ovality of the wire twisting is less than 2.0 mu m, and the tolerance of the fiber diameter is less than +/-5.0 mu m, thereby reducing the surface contact and the skin layer abrasion of the optical fiber in the drawing process, and improving the drawing surface quality of the optical fiber and the stability of the fiber diameter size of the optical fiber.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be further described below. It is obvious that the drawings in the following description are some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. Throughout the drawings, like elements or portions are generally identified by like reference numerals, and in the drawings, the elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic structural view of a vertical automatic optical fiber drawing mechanism without damage according to the present invention;
fig. 2 is a schematic front structural view of a non-damage vertical automatic optical fiber drawing mechanism provided by the invention.
FIG. 3 is a flow chart of a vertical automatic drawing method without damage for optical fiber according to the present invention.
In the figure:
the optical fiber drawing bench comprises a sliding guide rail 1, a first transmission sliding table 2, a second transmission sliding table 3, a first servo motor 4, a second servo motor 5, a first electric finger 6, a second electric finger 7, a back plate support 8, an optical fiber drawing tower 9 and a limiting block 10.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, an optical fiber nondestructive vertical automatic wire drawing mechanism includes a sliding guide rail 1 disposed parallel to a wire drawing direction;
a first transmission sliding table 2 is arranged on the sliding guide rail 1, and a second transmission sliding table 3 is arranged on the sliding guide rail below the first transmission sliding table 2;
the upper part of the sliding guide rail 1 is provided with a first servo motor 4, and the first servo motor 4 is connected with the first transmission sliding table 2 and used for realizing the ascending and descending of the first transmission sliding table 2;
a second servo motor 5 is arranged at the lower part of the sliding guide rail 1, and the second servo motor 5 is connected with a second transmission sliding table 3 and used for realizing the ascending and descending of the second transmission sliding table 3;
the first transmission sliding table 2 is connected with a first electric finger 6, and a first miniature servo motor is mounted on the first electric finger 6 and used for realizing the opening and closing of the first electric finger 6;
the second transmission sliding table 3 is connected with a second electric finger 7, and a second micro servo motor is installed on the second electric finger 7 and used for realizing the opening and closing of the second electric finger 7.
The invention uses the upper and lower electric fingers to alternatively clamp the optical fiber to draw, realizes the smooth wire drawing action of the optical fiber and high repeated positioning precision, reduces the surface contact and cortex damage of the optical fiber in the drawing process, and improves the surface quality and the wire diameter stability of the optical fiber drawing.
On the basis of the above embodiment, the first servo motor 4 and the second servo motor 5 are respectively connected to an intelligent program control system, and the intelligent program control system is used for respectively controlling the running speed and the running distance of the first transmission sliding table 2 and the second transmission sliding table 3.
On the basis of the above embodiments, the first micro servo motor and the second micro servo motor are respectively connected to an intelligent program control system, and the intelligent program control system is respectively used for controlling the opening and closing of the first electric finger 6 and the second electric finger 7.
The intelligent program control system is adopted, the intelligent program control adopts touch screen control, and parameters of the control system can be set, compensated and corrected; the complex action accurate operation in the wire drawing process is ensured, and the defect that the traditional PLC singlechip only has a single signal is abandoned; the movement speed of the moving part can be adjusted more conveniently and accurately, and the device has the advantages of stable action and small speed deviation.
Further, the device also comprises a laser positioning device;
the laser positioning device is arranged at the bottom of the sliding guide rail, and the laser of the laser positioning device is coaxial with the center of the first electric finger, the center of the second electric finger and a mother rod of the optical fiber yarn to be drawn;
the laser positioning device is used for accurately positioning the concentricity of the traction drawing when the optical fiber mother rod is adjusted and replaced.
The first electric finger 6 and the second electric finger 7 are parallel clamping plate structures, and parallel clamping plates of the parallel clamping plate structures are used for vertically drawing and drawing optical fibers.
One end of the electric finger is of a parallel clamping plate structure, so that the electric finger can be conveniently detached and replaced; the electric finger is driven by a micro motor, and the traditional compressed air drive is abandoned; the electric finger is arranged on the transmission sliding table and used for clamping the optical fiber yarn to draw the optical fiber yarn, the action of the electric finger is smooth, and the repeated positioning precision is high;
preferably, the inner surfaces of the parallel clamping plates are provided with rubber sheets.
The rubber sheet is made of rubber without carbon black, and preferably nitrile rubber; the thickness of the rubber sheet is 0.5-5.0 mm.
The rubber sheet is used for increasing the friction resistance of the drawn wire, so that the optical fiber is not slipped when the clamping plate draws the optical fiber in the drawing process;
further, the device also comprises a backboard bracket 8, the sliding guide rail 1 is fixedly installed on the backboard bracket 8, and the backboard bracket 8 can be far away from or close to the optical fiber yarn for adjustment so as to ensure that the center of the first electric finger 6, the center of the second electric finger 7 and the optical fiber yarn are coaxial;
the backboard bracket 8 is made of aluminum alloy so as to reduce the weight of the whole bearing frame;
the back plate bracket 8 can be matched with the optical fiber drawing tower 9 for installation and can be aligned and adjusted in the three-dimensional direction.
Further, the device also comprises a protective cover and a limiting block 10 arranged in the middle of the sliding guide rail 1;
a first transmission sliding table 2 is arranged on the sliding guide rail 1 above the limiting device 10;
a second transmission sliding table 3 is arranged on the sliding guide rail 1 below the limiting device 10;
the protective cover is arranged on the upper part of the sliding guide rail 1 and used for preventing the falling of a female rod stub bar or other foreign matters or sundries during wire drawing.
Preferably, a wire diameter tester is arranged above the sliding guide rail 1, and an automatic cutter is arranged below the sliding guide rail 1;
the wire diameter tester can test the wire diameter change and the ovality of at least two directions of the automatically drawn optical fiber;
the automatic cutter can cut the drawn optical fiber yarn in fixed length.
The method of automatic drawing by using the vertical automatic drawing mechanism without damage for optical fiber of the present invention will be described below with reference to specific examples
Example 1
Referring to fig. 3, a method for non-damage vertical automatic drawing of optical fiber includes the following steps:
initial preparation: the first electric finger and the second electric finger are positioned at the top ends of respective strokes and are opened to be in the maximum state; manually drawing a wire drawing stub bar of an optical fiber wire to be drawn to sequentially pass through a first electric finger and a second electric finger; before the wire drawing operation is prepared, the optical fiber wire to be drawn is required to be adjusted and positioned at the central positions of two electric fingers through a laser positioning device;
the first electric finger is positioned at the top end of the stroke of the upper half part of the sliding guide rail, the second electric finger is positioned at the top end of the stroke of the lower half part of the sliding guide rail, and the sliding guide rail is divided into the upper half part and the lower half part by a limiting block; the length of the sliding guide rail is 1600mm, the distance from the top end of the sliding guide rail to the limiting block is the stroke distance of the first sliding platform, and the distance from the limiting block to the bottom of the sliding guide rail is the stroke distance of the second sliding platform;
the first step is as follows: starting a first transmission sliding table connected with a first electric finger, wherein the first transmission sliding table runs downwards at the upper half part of the sliding guide rail in an accelerated manner, when the first transmission sliding table reaches a set wire drawing speed of 50 mm/second, the first electric finger is started to clamp optical fiber wires, the first electric finger starts to automatically draw the wires downwards at a constant speed according to the set wire drawing speed of 50 mm/second, and at the moment, a second electric finger is static to wait;
the second step is that: when the first electric finger runs to the end position reaching the set wire drawing length of 600mm, the second transmission sliding table connected with the second electric finger is started to run downwards at the lower half part of the sliding guide rail in an accelerated manner, when the second transmission sliding table reaches the set wire drawing speed of 50 mm/second, the second electric finger is started to clamp the optical fiber wire and starts to automatically draw the wire downwards at a constant speed according to the set wire drawing speed of 50 mm/second, and when the second electric finger clamps the optical fiber wire, the first electric finger releases the clamping jaw and opens the electric finger to the maximum;
the third step: when the second electric finger clamps the optical fiber filaments to automatically draw the optical fiber filaments downwards at a constant speed, the first transmission sliding table connected with the first electric finger starts to move upwards at the upper half part of the sliding guide rail, quickly moves to the top end of the sliding guide rail and waits for the next action;
the fourth step: when the second electric finger runs to the end point of the set wire drawing length of 600mm, simultaneously starting a first transmission sliding table connected with the first electric finger to start to downwards accelerate;
the fifth step: when the speed of the first transmission sliding table reaches the set wire drawing speed of 50 mm/s, starting a first electric finger to clamp the optical fiber wires, starting automatic uniform wire drawing according to the set wire drawing speed V, simultaneously loosening the optical fiber wires by a second electric finger and opening the optical fiber wires to be in a maximum state, then starting the second transmission sliding table to move upwards at the lower half part of the sliding guide rail, quickly moving to the lower end of the limiting block, and waiting for the next action;
repeating the action: and repeating the actions of the first step to the fifth step.
When the required length of the optical fiber yarn is achieved, the optical fiber yarn is cut off by an automatic cutter.
The ovality of the drawn optical fiber wire is less than 2.0 μm, the diameter of the drawn optical fiber wire is 1.20mm, and the tolerance of the diameter of the drawn optical fiber wire is less than +/-5.0 μm.
Example 2
The procedure of example 1 was followed, except that the drawing speed V was 70mm per second, the drawing distance L was 800mm, and the length of the slide rail was 2000mm.
Example 3
The procedure of example 1 was followed, except that the drawing speed V was 20mm per second, the drawing distance L was 400mm, and the length of the slide rail was 1200mm.
The intelligent control system is used for setting, adjusting and controlling the wire drawing speed of the transmission sliding table, the return speed of the transmission sliding table and the wire drawing length of the transmission sliding table; the optical fiber nondestructive automatic wire drawing system is adopted for automatic wire drawing, the clamping plate of the electric finger is used for clamping the optical fiber wire, the clamping plate of the electric finger is contacted with the optical fiber wire in a point contact mode to form a point contact wire drawing traction mode, the transmission sliding table and the electric finger are not contacted or touched with other positions of the optical fiber wire in the traction process, the contact with the optical fiber wire is reduced, and therefore the generation of surface defects of optical fibers is reduced, so that the performance indexes of the optical fiber wire such as the wire diameter size, the surface quality of the optical fiber wire, the verticality, the concentricity, the fiber wire diameter, the ellipticity and the like in the wire drawing process are more stable, the wire twisting and the surface damage of the optical fiber wire can not occur, the drawing quality of the optical fiber wire is ensured, the damage ratio of the optical fiber wire in the wire drawing process is reduced, and the quality of internal finished products of optical fiber image transmission elements is improved.
In the wire drawing method, the sliding guide rail is adopted in the same direction, the concentricity of the first transmission sliding table, the second transmission sliding table and the first electric finger and the second electric finger can be better and more effectively controlled, the first electric finger and the second electric finger which are arranged up and down can well realize the wire drawing butt joint in the processes of vertical drawing and traction drawing of the optical fiber wire, and the optical fiber wire drawing process is not deviated.
The above-described embodiment is only one preferred embodiment of the present invention, and general changes and substitutions by those skilled in the art within the technical scope of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A method for vertical automatic drawing of optical fiber without damage is characterized by comprising the following steps:
initial preparation: the first electric finger is positioned at the top end of the stroke of the upper half part of the sliding guide rail, the second electric finger is positioned at the top end of the stroke of the lower half part of the sliding guide rail, the sliding guide rail is divided into the upper half part and the lower half part by a limiting block, and the first electric finger and the second electric finger are in an opening state; manually drawing a drawing mother rod stub bar of the optical fiber wire to be drawn to sequentially pass through a first electric finger and a second electric finger, and adjusting and positioning the optical fiber wire to be drawn to be in the central positions of the two electric fingers through a laser positioning device before the wire drawing operation is prepared;
the first step is as follows: starting a first transmission sliding table connected with a first electric finger, wherein the first transmission sliding table runs downwards at the upper half part of the sliding guide rail in an accelerated manner, when the first transmission sliding table reaches a set wire drawing speed V, starting the first electric finger to clamp the optical fiber wire, the first electric finger starts to automatically draw the wire downwards at a constant speed according to the set wire drawing speed V, and at the moment, a second electric finger stands still for waiting;
the second step is that: when the first electric finger runs to the end position of the set wire drawing length L, the second transmission sliding table connected with the second electric finger is started to run downwards at the lower half part of the sliding guide rail at an accelerated speed, when the second transmission sliding table reaches the set wire drawing speed V, the second electric finger is started to clamp the optical fiber wire to automatically draw the optical fiber wire downwards at a constant speed according to the set wire drawing speed V, and when the second electric finger clamps the optical fiber wire, the first electric finger releases the clamping jaw and opens the electric finger;
the third step: when the second electric finger clamps the optical fiber filaments to automatically draw the optical fiber filaments downwards at a constant speed, the first transmission sliding table connected with the first electric finger starts to move upwards at the upper half part of the sliding guide rail, rapidly moves to the top end of the sliding guide rail and waits for the next action;
the fourth step: when the second electric finger runs to reach the end point of the set wire drawing length L, simultaneously starting a first transmission sliding table connected with the first electric finger to start to downwards accelerate;
the fifth step: when the speed of the first transmission sliding table reaches a set wire drawing speed V, starting a first electric finger to clamp the optical fiber wires, starting automatic uniform wire drawing according to the set wire drawing speed V, simultaneously loosening the optical fiber wires by a second electric finger and opening the optical fiber wires, then starting the second transmission sliding table to move upwards at the lower half part of the sliding guide rail, quickly moving to the lower end of the limiting block, and waiting for the next action;
repeating the actions: repeating the actions of the first step to the fifth step;
the wire drawing speed V is 20-70 mm per second;
the wire drawing distance L is 400-800mm;
the ovality of the drawn optical fiber is less than 2.0 μm, the diameter of the drawn optical fiber is 0.5-3.5 mm, and the tolerance of the diameter of the drawn fiber is less than +/-5.0 μm.
2. The method for non-invasive vertical automatic fiber drawing of optical fibers according to claim 1, wherein the drawing speed V is 50mm per second.
3. The method for non-invasive vertical automatic fiber drawing of optical fibers according to claim 1, wherein the drawing distance L is 600mm.
4. The method for vertical automatic fiber drawing without damage of optical fiber according to claim 1, wherein the sliding guide rail is 1 guide rail, and the length of the sliding guide rail is 1200-2000mm.
5. The method for non-invasive vertical automatic fiber drawing according to claim 4, wherein the length of the sliding guide rail is 1600mm.
6. The method of claim 4, wherein the optical fiber is cut by an automatic cutter when the desired length of the optical fiber is achieved.
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| CN111410417A (en) * | 2020-03-31 | 2020-07-14 | 中国建筑材料科学研究总院有限公司 | Wire drawing device and method for reducing surface defects of optical fiber wires |
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| CN104529150A (en) * | 2014-12-04 | 2015-04-22 | 中天科技光纤有限公司 | Control system for on-line calibration of drawn fibers and controlling method thereof |
| CN209583994U (en) * | 2018-12-26 | 2019-11-05 | 广州宏晟光电科技股份有限公司 | A kind of not damaged wire-drawing mechanism of composite fiber |
| CN111410417A (en) * | 2020-03-31 | 2020-07-14 | 中国建筑材料科学研究总院有限公司 | Wire drawing device and method for reducing surface defects of optical fiber wires |
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