CN107414608B - Rotary type optical fiber preform magnetorheological polishing machine and polishing method thereof - Google Patents
Rotary type optical fiber preform magnetorheological polishing machine and polishing method thereof Download PDFInfo
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- CN107414608B CN107414608B CN201710802214.4A CN201710802214A CN107414608B CN 107414608 B CN107414608 B CN 107414608B CN 201710802214 A CN201710802214 A CN 201710802214A CN 107414608 B CN107414608 B CN 107414608B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
- B24B1/005—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes using a magnetic polishing agent
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Abstract
The invention relates to the technical field of magnetorheological polishing, in particular to a rotary optical fiber perform magnetorheological polishing machine and a polishing method thereof, wherein the polishing machine comprises an optical fiber perform positioning device, a magnetorheological fluid circulating system connected with the optical fiber perform positioning device and a rotary magnetorheological polishing head device for polishing the optical fiber perform; the rotary magnetorheological polishing head device comprises a magnetic rotating wheel, an electromagnet, a graphite rod, a tension wheel, a hollow main shaft, a bearing seat and a servo motor, wherein the servo motor drives the magnetic rotating wheel to rotate, the magnetic rotating wheel drives the electromagnet to rotate to form a high-speed rotating magnetic field, and the magnetic field acts on magnetorheological fluid in the quartz glass tube to form a high-speed rotating flexible polishing film. The invention utilizes a high-speed rotating magnetic field to realize the polishing processing of the outer circle and the inner hole of the optical fiber preform immersed in the magnetorheological fluid loop by adopting different optical fiber preform holding modes.
Description
Technical Field
The invention relates to the technical field of magnetorheological polishing, in particular to a rotary type optical fiber preform magnetorheological polishing machine and a polishing method thereof.
Background
The core of optical fiber manufacturing is optical fiber preform manufacturing technology. At present, the common optical fiber processing methods mainly include deposition methods and mechanical methods, and the deposition methods include chemical vapor phase, tube-outside vapor phase, plasma vapor phase and the like. The technology at the present stage is that a prefabricated rod core rod is manufactured firstly, and then an outer cladding layer is manufactured outside the core rod by adopting different technologies. Compared with the deposition method, the mechanical method has less investment in the early stage and is suitable for batch processing of special optical fibers. The main implementation flow of the mechanical method comprises the processes of preparing original optical fiber glass, processing a preform blank, grinding and polishing the inner surface and the outer surface of the preform, drawing the preform and the like.
The surface quality of the optical fiber preform is closely related to the optical fiber quality. In order to obtain mirror-surface-level inner and outer surfaces, a subsequent polishing and shaping processing method and technology become an essential important process; at present, polishing of an inner hole and an outer circle of a prefabricated rod is mainly finished by manual operation and mechanical polishing, so that the polishing efficiency is low, the labor intensity is high, and stable profile precision and polishing quality are difficult to obtain. Therefore, the research on the efficient and high-surface-quality batch polishing method and device for polishing the inner hole and the outer circle of the nonmetal material has important significance for improving the manufacturing efficiency and quality of the optical fiber preform and even the optical fiber.
The common polishing methods mainly include chemical polishing, magnetic polishing, flame polishing, floating polishing, and the like. The selection of the polishing method has great limitations due to the mechanical properties (large brittleness, easy surface scratching, etc.), the shape (inner and outer cylindrical surfaces), the size (length about 150mm, diameter about 20mm, inner diameter about 3-8 mm), the equipment investment, etc. of the optical fiber preform.
The magnetorheological polishing technology mainly utilizes the rheological property of the magnetorheological fluid in a magnetic field for polishing, namely, under a strong magnetic field, the magnetic components of the magnetorheological fluid can show the property similar to solid through rheological action to form the characteristic of a flexible grinding wheel with viscoplasticity, and the flowing property of the flexible grinding wheel is recovered when the magnetic field disappears. The realization of the technology requires relative motion between the surface of the part and the magnetorheological polishing solution, and after a magnetic field is added, shearing force can be formed between the polishing solution and the surface of the part, so that the high-quality polishing of the surface of the part is realized. In the magnetorheological polishing process, the polishing efficiency mainly depends on the magnitude of the shearing force between the contact surfaces, specifically the magnetic field intensity, the relative movement speed and other factors.
Practice proves that: the magnetorheological technology has excellent grinding and polishing performance. Patent ZL96198445.7 discloses a method for precisely machining the surface of a part with magnetorheological fluid, wherein in a magnetic field, the magnetized magnetorheological fluid enters a gap between a workpiece and a flexible polishing wheel through the flexible polishing wheel, contacts with part of the surface of the workpiece and removes the workpiece material contacted with the workpiece. Patent ZL 03124579.9 discloses an external magnetic field device which can spray magnetorheological fluid and make it form jet flow, and the device controls the degeneration of the magnetorheological fluid by controlling the size, direction and position of the magnetic field around the nozzle, so as to realize the polishing of the workpiece. Patent ZL200410044076.0 discloses a rotary tool head of an ultrasonic magnetorheological composite polishing device, wherein magnetorheological fluid is introduced into the rotary tool head, and under the action of a magnetic field, the motion track of the tool head is controlled by a precise control system so as to form a high-precision optical surface.
Disclosure of Invention
The invention provides a rotary optical fiber perform magnetorheological polishing machine and a polishing method thereof, wherein the polishing machine utilizes a high-speed rotary magnetic field and adopts different optical fiber perform clamping modes to realize polishing processing of an outer circle and an inner hole of an optical fiber perform immersed in a magnetorheological fluid loop.
In order to achieve the purpose, the invention adopts the following technical scheme:
a rotary optical fiber perform magnetorheological polishing machine is characterized by comprising an optical fiber perform positioning device, a magnetorheological fluid circulating system connected with the optical fiber perform positioning device and a rotary magnetorheological polishing head device used for polishing the optical fiber perform;
the optical fiber perform positioning device comprises a left thimble and a right thimble, the left thimble and the right thimble are bonded with the left end and the right end of the optical fiber perform by paraffin, the left thimble and the right thimble are respectively connected with a left supporting seat and a right supporting seat by adjusting screws, micro springs are respectively arranged between the left thimble and the right thimble and the adjusting screws, a quartz glass tube is connected between the left supporting seat and the right supporting seat, and the quartz glass tube is sleeved outside the optical fiber perform;
the magnetorheological fluid circulating system comprises an upper water tank and a lower water tank, wherein the upper water tank is used for conveying magnetorheological fluid into one end of the optical fiber preform positioning device, the lower water tank is used for leading the magnetorheological fluid out of the other end of the optical fiber preform positioning device, a water return pipeline used for leading the magnetorheological fluid into the upper water tank is arranged at the other end of the optical fiber preform positioning device, and the lower water tank is used for discharging the magnetorheological fluid through a water discharge pipeline; the upper water tank and the lower water tank are respectively connected with the quartz glass tube through corresponding water outlet pipelines by utilizing a left support seat and a right support seat of the optical fiber perform positioning device, and the horizontal positions of the upper water tank, the optical fiber perform positioning device and the lower water tank are sequentially reduced;
the rotary magnetorheological polishing head device comprises a magnetic force rotating wheel, an electromagnet, a graphite rod, a tension wheel, a hollow main shaft, a bearing seat and a servo motor, wherein the hollow main shaft is fixedly connected with the bearing seat through the bearing; the servo motor drives the magnetic force rotating wheel to rotate through the tension wheel, the magnetic force rotating wheel drives the electromagnet to rotate to form a high-speed rotating magnetic field, and the magnetic field acts on the magnetorheological fluid in the quartz glass tube to form a high-speed rotating flexible polishing film.
Furthermore, at least one square annular groove is formed in the outer edge of the magnetic rotating wheel, and the conductive slip ring is connected with the magnetic rotating wheel through the square annular groove; the magnetic rotating wheel is provided with a through hole which is coaxial with the magnetic rotating wheel, and the conductive slip ring is connected with the electromagnet through the through hole by using a lead.
Further, the graphite rod and the graphite rod screw are arranged on the graphite rod bracket through a graphite rod guide post, the graphite rod bracket is connected with the bearing seat, and the graphite rod screw is connected with the graphite rod through a graphite rod fastener;
furthermore, a miniature spring is arranged between the graphite rod screw and the graphite rod fastener.
Further, a display lamp is arranged in the closed loop, and the voltage stability of the closed loop is judged through the brightness change of the display lamp.
Furthermore, the power supply is connected with the graphite rod through a voltage regulator and a voltage sensor in sequence, and the voltage regulator can further regulate the output voltage of the servo motor according to the voltage change condition detected by the voltage sensor, so that the aim of regulating the magnetic field intensity is fulfilled.
Furthermore, the servo motor is connected with the servo motor speed regulator, and the servo motor speed regulator is used for regulating the rotating speed of the servo motor, so that the dynamic regulation of the rotating speed of the rotating magnetic field is realized.
Furthermore, the polishing machine also comprises an electric control system, wherein the electric control system comprises a servo system electric control subsystem, a rotary type magnetorheological polishing electric control subsystem, a magnetorheological fluid circulating system electric control subsystem and an auxiliary basic electric control system.
A polishing method of a rotary magnetorheological polishing head device is characterized in that the polishing method of an inner hole of an optical fiber preform rod comprises the following steps: the magnetorheological fluid is introduced into an inner hole channel of the optical fiber preform, the electromagnet and the conductive slip ring form a high-speed rotating magnetic field under the high-speed rotation of the magnetic rotating wheel, the magnetorheological fluid forms a high-speed rotating magnetic polishing head under the magnetic action of the magnetic field, and the inner hole of the optical fiber preform is polished by using the magnetic polishing head.
A polishing method of a rotary magnetorheological polishing head device is characterized in that the outer circle polishing method of an optical fiber preform rod comprises the following steps: the magnetorheological fluid is introduced into a quartz glass tube, then the optical fiber preform is fixed inside the quartz glass tube, under the high-speed rotation of the magnetic rotating wheel, the electromagnet and the conductive sliding ring form a high-speed rotating magnetic field, under the magnetic action of the magnetic field, the magnetorheological fluid is converted into a flexible polishing film and rotates at a high speed, and the outer circle of the optical fiber preform is polished.
The beneficial effects produced by the invention are as follows:
1. the magnetorheological high-speed rotating polishing head device has the advantages of simple structure, high integration level and convenience in operation and installation, and can be used independently or in a matched manner, so that the defects of the technology of rotating a workpiece by adopting a fixed position electromagnetic field can be effectively reduced, and the technical problems that the small-size workpiece is unstable in high-speed rotation and easy to damage are solved.
2. The invention utilizes a closed loop formed by the graphite rod, the conductive slip ring and the electromagnet, forms a high-speed magnetic field through high-speed rotation of a magnetic rotation theory, and can ensure full contact of the graphite rod and the conductive slip ring by arranging the miniature spring on the guide rod.
3. The invention is provided with the voltage sensor for monitoring the magnetic field intensity, and can preliminarily judge the magnetic field intensity by observing the brightness change of the display lamp visually; the voltage sensor is used for measuring and recording the change of the input voltage of the electromagnet, so that the accurate monitoring of the intensity of the magnetic field is realized.
4. The invention realizes the high-speed rotating magnetic field which is arranged on the magnetic rotating wheel and can normally run by utilizing the design idea of the collecting ring.
5. According to the characteristic that the hardness of the quartz glass tube is far higher than that of the glass material of the optical fiber perform, the optical fiber perform positioning device arranged in the magnetorheological fluid circulating system is designed, the device is simple and convenient to install, the optical fiber perform can be effectively polished, and the axial tightening force of the optical fiber perform can be effectively adjusted through the micro springs on the left and right adjusting screws.
6. The invention effectively adjusts three parameters of magnetorheological polishing processing: the magnetic field intensity and the magnetic field rotation speed are respectively adjusted by an electric control device, the axial movement speed of the magnetic field is dynamically adjusted by a servo system, the effective dynamic adjustment of magnetic polishing core parameters is ensured, and the high-efficiency and high-quality processing of the optical fiber perform rod is realized.
Drawings
FIG. 1 is a schematic diagram of inner hole polishing of a magnetorheological polishing head for an optical fiber preform according to the present invention;
FIG. 2 is a schematic diagram of the outer circle polishing of the magnetorheological polishing head of the optical fiber preform according to the present invention;
FIG. 3 is a front view of the magnetorheological polishing head apparatus of the present invention;
FIG. 4 is a top view of the magnetorheological polishing head apparatus of the present invention;
FIG. 5 is a front view of the magnetic rotary wheel of the present invention;
FIG. 6 is a right side view of the magnetic rotary wheel of the present invention;
FIG. 7 is a structural view of an optical fiber preform positioning apparatus of the present invention;
FIG. 8 is a block diagram of a magnetorheological fluid circulation system in accordance with the invention;
FIG. 9 is a schematic view of an electrical control apparatus of the present invention;
FIG. 10 is a block diagram of a servo system of the present invention;
FIG. 11 is a front view of the case of the magnetic polisher of the present invention;
fig. 12 is a schematic side view of the case of the magnetic polisher of the present invention.
In the figure: <xnotran> 1- , 2- , 3- , 4- , 5- , 6- , 7- 8- , 9- , 10- , 11- , 12- , 13- , 14- , 15- , 16- , 17- , 18- , 19- , 20- , 21- , 22- , 23- , 24- , 25- , 26- , 27- , 28- , 29- , 30- , 31- , 32- , 33- , 34- , 35- , 36- , 37- , 38- , 39- , 40- , 41- , 42- , 43- , 44- , 45- , 46- , 47- , 48- , 49- , 50- , 51- , 52- , 53- , </xnotran> 54-lead screw, 55-guide post, 56-first electromagnetic valve, 57-water tank cover, 58-front cover plate, 59-side door zipper, 60-lock nut, 61-front folding door, 62-transparent plastic plate, 63-hinge, 64-front handle, 65-electric control panel, 66-anchor screw, 67-case frame, 68-rear cover plate and 69-left door.
Detailed Description
The invention will be described in more detail below with reference to the drawings and specific examples, but the scope of the invention is not limited thereto.
A rotary type magnetorheological polishing system for an optical fiber perform comprises an optical fiber perform positioning device, a magnetorheological fluid circulating system connected with the optical fiber perform positioning device, and a rotary type magnetorheological polishing head device for polishing the optical fiber perform;
the optical fiber perform positioner is including controlling the thimble, utilize paraffin bonding between the thimble about the optical fiber perform both ends, control the thimble respectively through adjusting screw with control the supporting seat connection, control the thimble with be equipped with micro spring between the adjusting screw respectively, control and be connected with the quartz glass pipe between the supporting seat, the quartz glass pipe is established the outside of optical fiber perform.
As shown in fig. 7, the left thimble 29 and the right thimble 30 bond the left and right ends of the optical fiber preform 23 with paraffin; the left thimble 29 is connected with a left support seat 33 through a first adjusting screw 31, and the right thimble 30 is connected with a right support seat 34 through a second adjusting screw 32; the optical fiber cable comprises a left thimble 29 and a first adjusting screw 31, wherein a first micro spring 35 is arranged between the left thimble 29 and the first adjusting screw 31, a second micro spring 36 is arranged between the right thimble 30 and the second adjusting screw 32, a left support seat 33 and a right support seat 34 are connected with a quartz glass tube 28, and the quartz glass tube 28 is sleeved outside an optical fiber perform 23. The left supporting seat 33 is connected with the left positioning bracket 26 through a screw, and the right supporting seat 34 is connected with the right positioning bracket 27 through a screw. The optical fiber preform positioning device can accurately position the optical fiber preform 23.
The magnetorheological fluid circulating system comprises an upper water tank and a lower water tank, wherein the upper water tank is used for conveying magnetorheological fluid into one end of the optical fiber preform positioning device, the lower water tank is used for leading the magnetorheological fluid out of the other end of the optical fiber preform positioning device, a water return pipeline used for leading the magnetorheological fluid into the upper water tank is arranged at the other end of the optical fiber preform positioning device, and the lower water tank is used for discharging the magnetorheological fluid through a drainage pipeline; the upper water tank and the lower water tank are respectively connected with the quartz glass tube 28 through corresponding water outlet pipelines by utilizing a left support seat and a right support seat of the optical fiber perform positioning device, and the horizontal positions of the upper water tank, the optical fiber perform positioning device and the lower water tank are sequentially reduced.
As shown in fig. 8, a first water outlet pipe 41 is disposed at the bottom of the first water tank 40, and the magnetorheological fluid flows into one end of the silica glass tube 28 through the first water outlet pipe 41 via the left support seat 33 of the optical fiber preform positioning device; a water return pipe 43 is arranged at the top of the right support seat 34, and a part of the magnetorheological fluid in the quartz glass tube 28 flows into the first water inlet 43 at the top of the first water tank 40 through the water return pipe 42. The bottom of the right supporting seat 34 is provided with a second water outlet pipeline 44, the other part of the magnetorheological fluid in the quartz glass tube 28 flows into a second water tank 45 through the second water outlet pipeline 44, the second water tank 45 is provided with a water discharge pipeline 46, and the magnetorheological fluid is discharged from the second water tank 45 through the water discharge pipeline 46. The first water outlet pipe 41 is provided with a first water pump 37, and the second water outlet pipe 44 is provided with a second water pump 38. The first water tank is provided with a stirrer 39.
As shown in fig. 3 to 6, the rotary magnetorheological polishing head device comprises a magnetic rotating wheel 1, an electromagnet 2, a graphite rod 3, a tension wheel 4, a hollow spindle 5, a bearing 6, a bearing seat 7 and a servo motor 8, wherein the hollow spindle 5 is fixedly connected with the bearing seat 7 through the bearing 6, the bearing is a widened series deep groove ball bearing, an outer ring of the bearing 6 is matched with the bearing seat 7, an inner ring of the bearing 6 is matched with the hollow spindle 5, and the bearing seat 7 is fixed on a support 17 through screws. The hollow main shaft 5 is connected with the magnetic rotating wheel 1 through a screw, a bearing 6 arranged on the hollow main shaft 5 is fastened through a bearing adjusting nut, and the diameter of an inner hole of the hollow main shaft 5 is larger than 30mm. The outer fringe of magnetic force swiveling wheel 1 is nested there is electrically conductive sliding ring 9, the mid-mounting of magnetic force swiveling wheel 1 has electro-magnet 2, electro-magnet 2 through the wire with electrically conductive sliding ring 9 is connected, graphite rod 3 is connected with the 220V power, graphite rod 3 can with electrically conductive sliding ring 9 contacts, forms closed circuit. The conductive slip ring 9 is connected to the electromagnet 2 by means of a wire, so that a normal voltage supply of the electromagnet 2 is achieved. The magnetic rotating wheel 1 is connected with the hollow spindle 5 through a screw. And a motor wheel is arranged on the servo motor 8 and is connected with the magnetic rotating wheel 1 through a belt 21. The servo motor 8 drives the magnetic rotating wheel 1 to rotate through the tension wheel 4, the magnetic rotating wheel 1 drives the electromagnet 2 to rotate to form a high-speed rotating magnetic field, and then the rotating motion of the magnetic field is completed.
Preferably, the bearing seat 7 is arranged on a bracket 17, and the bracket 17 is fixedly connected with the servo motor 8 through a screw. The tensioning wheel 4 is connected to the carrier 17 via a tensioning wheel support 19.
Preferably, the electromagnet 2 is mounted on the magnetic rotating wheel 1 through an electromagnet seat 18.
Preferably, the outer edge of the magnetic rotating wheel 1 is provided with two square annular grooves, and the conductive slip ring 9 is connected with the magnetic rotating wheel 1 through the square annular grooves. Specifically, the axis of revolution that uses magnetic force swiveling wheel 1 on magnetic force swiveling wheel 1's outer fringe is the original point, mills out two square circular slots: a first square circular groove 11 and a second square circular groove 12; the square round grooves are nested in the conductive slip ring 9 and are bonded together by glue.
Preferably, a through hole 10 is formed in the magnetic rotating wheel 1 below the first square circular groove 11 and the second square circular groove 12, the through hole 10 is coaxially arranged with the magnetic rotating wheel 1, and the conductive slip ring 9 is connected with the electromagnet 2 through the through hole 10 by using a lead.
Preferably, the graphite rod 3 is connected with the bearing seat 7 through a graphite rod bracket 13; the graphite rod 3 is fixed on a graphite rod support 13, and the graphite rod support 13 is connected with the bearing seat 7 through a screw.
Preferably, a graphite rod guide post 22 is arranged on the graphite rod support 13, a graphite rod 3 and a graphite rod screw 15 are arranged on the graphite rod guide post 24, and the graphite rod screw 15 is connected with the graphite rod 3 through a graphite rod fastener 16.
Preferably, in order to ensure the sufficient contact between the graphite rod 3 and the conductive slip ring 9, the part of the graphite rod screw 15, which is higher than the graphite rod fastener 16, is provided with a micro spring 14.
Preferably, in order to monitor the intensity and the rotating speed of the magnetic field in real time and ensure the polishing quality, one or more of a servo motor speed regulating device 20, a display device and a voltage monitoring device are arranged on the device.
And the servo motor speed regulating device 20 is used for connecting the servo motor 8 with the servo motor speed regulating device 20, and the servo motor speed regulating device 20 is used for regulating the rotating speed of the servo motor 8 so as to realize dynamic regulation of the rotating speed of the rotating magnetic field.
The display lamp is connected in series in the electromagnet loop and used for judging whether the voltage of the electromagnet 2 circuit is stable or not according to whether the display lamp works stably or not. When the voltage is stable and the work is normal, the display lamp normally emits light; when the voltage is unstable or power is cut off, the brightness of the display lamp will change. The voltage condition of the circuit can be judged according to the condition of observing the display lamp, and the circuit is simple and convenient.
In order to improve the monitoring effect, a voltage monitoring device is arranged in the loop, the power supply is connected with the graphite rod through a voltage regulator and a voltage sensor in sequence, and the voltage sensor is used for detecting a voltage signal in the loop so as to accurately judge the change condition of the magnetic field intensity; the output voltage of the servo motor is adjusted through the voltage regulator, so that the purpose of adjusting the strength of the magnetic field is achieved.
The servo motor speed regulating device 20, the servo motor 8, the voltage regulator, the voltage sensor, the graphite rod, the electromagnet 2 and the display lamp form a rotary type magneto-rheological polishing electronic control subsystem.
As shown in fig. 9, the polishing system further comprises an electronic control system 46, wherein the electronic control system 46 comprises a servo system electronic control subsystem 47, a rotary magnetorheological polishing electronic control subsystem 48, a magnetorheological fluid circulating system electronic control subsystem 49, and an auxiliary basic electronic control system 50.
As shown in fig. 10, the servo electronic control subsystem 47 is based on a servo controller, and is installed on the electronic control panel 65, and the signal input end of the servo controller is connected with the control end of the servo motor 8; the worktable 52, the servo system bracket 53, the lead screw 54, the servo motor 8 and the guide post 55 form a servo system device 3. The servo motor 55 is connected with a lead screw 54 through a coupler; the screw 54 is connected with the workbench 52 through a screw nut; the guide post 55 is fixed on the servo system bracket 53; the servo frame 53 is fixed to the cabinet frame 67 by screws.
The electric control subsystem of the magnetorheological fluid circulating system comprises a first electromagnetic valve 56 provided with a first electromagnetic valve control switch, a second electromagnetic valve 38 provided with a second electromagnetic valve control switch, a stirrer 39 provided with a stirrer control switch and a first water pump 37 provided with a water pump switch. The first electromagnetic valve control switch, the second electromagnetic valve control switch, the stirrer control switch and the water pump switch are all arranged on an electric control panel of the case.
The auxiliary basic electric control system comprises a power supply main switch arranged on the electric control panel, a control switch of the servo motor, an illumination switch and a display, and the display can observe the rotating speed of the magnetic rotating wheel in real time and check the running state of the machine. As shown in fig. 11 and 12, the rheo-polishing system is packaged by a cabinet, which mainly includes a front cover plate 58, a side door fastener 59, a lock nut 60, a front folding door 61, a transparent plastic plate 62, a hinge 63, a front handle 64, a tank lid 57, an electric control panel 65, a foot screw 66, a cabinet frame 67, a rear cover plate 68, a left side door 69, and a top cover plate 70; the front cover plate 58, the rear cover plate 68, the top cover plate, the right cover plate and the electric control panel 65 are fixed on the chassis frame 67 through screws; the upper part of the front folding door 61 is fixed on a machine box frame 67 through a hinge 63, the lower part is connected with the machine box frame 67 through a locking nut 60, and the middle opening part is connected with a transparent plastic plate 62 through a fastening part.
As shown in fig. 1, a polishing method based on a rotary magnetorheological polishing head device is characterized in that the polishing method of the inner hole 24 of the optical fiber preform 23 comprises the following steps: the magnetorheological fluid is introduced into a channel of an inner hole 24 of an optical fiber preform 23 with a circular cross section, the inner hole 24 is a circular through hole with the axis of the preform as the center of a circle, under the high-speed rotation of the magnetic rotating wheel 1, the electromagnet 2 and the conductive slip ring 9 form a high-speed rotating magnetic field, under the magnetic action of the magnetic field, the magnetorheological fluid forms a high-speed rotating magnetic polishing head, and the inner hole 24 of the optical fiber preform 23 is polished by the magnetic polishing head.
As shown in fig. 2, a polishing method based on a rotary magnetorheological polishing head device is characterized in that the polishing method for the outer circle 25 of the optical fiber preform 23 comprises the following steps: the magnetorheological fluid is introduced into a quartz glass guide tube, then the optical fiber preform 23 is fixed inside the quartz glass guide tube, under the high-speed rotation of the magnetic rotating wheel 1, the electromagnet 2 and the conductive slip ring 9 form a high-speed rotating magnetic field, under the magnetic action of the magnetic field, the magnetorheological fluid is converted into a flexible polishing film and rotates at a high speed, and the excircle 25 of the optical fiber preform 23 is polished.
It should be noted that the above-mentioned embodiments illustrate rather than limit the technical solutions of the present invention, and that equivalent substitutions or other modifications made by persons skilled in the art according to the prior art are included in the scope of the claims of the present invention as long as they do not exceed the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. A rotary optical fiber perform magnetorheological polishing machine is characterized by comprising an optical fiber perform positioning device, a magnetorheological fluid circulating system connected with the optical fiber perform positioning device and a rotary magnetorheological polishing head device used for polishing the optical fiber perform;
the optical fiber perform positioning device comprises a left thimble and a right thimble, the left thimble and the right thimble are bonded with the left end and the right end of the optical fiber perform by paraffin, the left thimble and the right thimble are respectively connected with a left supporting seat and a right supporting seat by adjusting screws, micro springs are respectively arranged between the left thimble and the right thimble and the adjusting screws, a quartz glass tube is connected between the left supporting seat and the right supporting seat, and the quartz glass tube is sleeved outside the optical fiber perform;
the magnetorheological fluid circulating system comprises an upper water tank and a lower water tank, wherein the upper water tank is used for conveying magnetorheological fluid into one end of the optical fiber preform positioning device, the lower water tank is used for leading the magnetorheological fluid out of the other end of the optical fiber preform positioning device, a water return pipeline used for leading the magnetorheological fluid into the upper water tank is arranged at the other end of the optical fiber preform positioning device, and the lower water tank is used for discharging the magnetorheological fluid through a water discharge pipeline; the upper water tank and the lower water tank are respectively connected with the quartz glass tube through corresponding water outlet pipelines by utilizing a left support seat and a right support seat of the optical fiber perform positioning device, and the horizontal positions of the upper water tank, the optical fiber perform positioning device and the lower water tank are sequentially reduced;
the rotary magnetorheological polishing head device comprises a magnetic force rotating wheel, an electromagnet, a graphite rod, a tension wheel, a hollow main shaft, a bearing seat and a servo motor, wherein the hollow main shaft is fixedly connected with the bearing seat through the bearing; the servo motor drives the magnetic force rotating wheel to rotate through the tension wheel, the magnetic force rotating wheel drives the electromagnet to rotate to form a high-speed rotating magnetic field, the magnetic field acts on the magnetorheological fluid in the quartz glass tube to form a high-speed rotating flexible polishing film,
the outer edge of the magnetic rotating wheel is provided with at least one square annular groove, and the conductive slip ring is connected with the magnetic rotating wheel through the square annular groove; the magnetic rotating wheel is provided with a through hole which is coaxial with the magnetic rotating wheel, the conductive slip ring is connected with the electromagnet through the through hole by a lead,
the graphite rod and the graphite rod screw are arranged on the graphite rod support through a graphite rod guide pillar, the graphite rod support is connected with the bearing seat, and the graphite rod screw is connected with the graphite rod through a graphite rod fastener.
2. The rotary optical fiber preform magnetorheological polishing machine according to claim 1, wherein a micro spring is arranged between the graphite rod screw and the graphite rod fastener.
3. The rotary optical fiber preform magnetorheological polishing machine according to claim 1, wherein a display lamp is arranged in the closed loop, and the voltage stability of the closed loop is judged according to the brightness change of the display lamp.
4. The rotary optical fiber preform magnetorheological polishing machine according to claim 1, wherein the power supply is connected with the graphite rod sequentially through a voltage regulator and a voltage sensor, and the voltage regulator can further regulate the output voltage of the servo motor according to the voltage change detected by the voltage sensor, so as to achieve the purpose of regulating the intensity of the magnetic field.
5. The rotary type optical fiber preform magnetorheological polishing machine according to claim 1, wherein the servo motor is connected with a servo motor speed regulator, and the servo motor speed regulator is used for regulating the rotating speed of the servo motor, so that the dynamic regulation of the rotating speed of the rotating magnetic field is realized.
6. The rotary optical fiber preform magnetorheological polishing machine according to claim 1, further comprising an electric control system, wherein the electric control system comprises a servo system electric control subsystem, a rotary magnetorheological polishing electric control subsystem, a magnetorheological fluid circulating system electric control subsystem and an auxiliary basic electric control system.
7. The polishing method of the rotary optical fiber preform magnetorheological polishing machine according to claim 1, wherein the inner hole polishing method of the optical fiber preform comprises the following steps: the magnetorheological fluid is introduced into an inner hole channel of the optical fiber preform, the electromagnet and the conductive slip ring form a high-speed rotating magnetic field under the high-speed rotation of the magnetic rotating wheel, the magnetorheological fluid forms a high-speed rotating magnetic polishing head under the magnetic action of the magnetic field, and the inner hole of the optical fiber preform is polished by using the magnetic polishing head.
8. The polishing method of the rotary optical fiber preform magnetorheological polishing machine as claimed in claim 1, wherein the polishing method of the rotary magnetorheological polishing head device is characterized in that the outer circle polishing method of the optical fiber preform comprises the following steps: the magnetorheological fluid is introduced into a quartz glass tube, then the optical fiber preform is fixed inside the quartz glass tube, under the high-speed rotation of the magnetic rotating wheel, the electromagnet and the conductive sliding ring form a high-speed rotating magnetic field, under the magnetic action of the magnetic field, the magnetorheological fluid is converted into a flexible polishing film and rotates at a high speed, and the outer circle of the optical fiber preform is polished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN107900790A (en) * | 2017-12-01 | 2018-04-13 | 河南伯特利知识产权服务有限公司 | Optical fiber prefabricating plug magnetorheological polishing machine |
| CN107900791A (en) * | 2017-12-01 | 2018-04-13 | 河南伯特利知识产权服务有限公司 | Optical fiber prefabricating mandril burnishing device |
| CN109001064A (en) * | 2018-08-23 | 2018-12-14 | 江苏亨通光导新材料有限公司 | A kind of method of quantitative measurment and evaluation preform polishing effect |
| CN116372785B (en) * | 2023-06-05 | 2023-08-08 | 长春工业大学 | Magnetorheological polishing device and method suitable for multiple surface types |
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| WO1994004313A1 (en) * | 1992-08-14 | 1994-03-03 | Byelocorp Scientific, Inc. | Magnetorheological polishing devices and methods |
| EP0716047A3 (en) * | 1994-12-02 | 1996-10-09 | Fibercore Inc | Method and apparatus for producing optical fiber preform |
| CN101139162B (en) * | 2007-08-02 | 2010-08-04 | 宁波大学 | Equipment for preparing heavy metallic oxide glass fibre-optical prefabricated rod cladding sheathed tube |
| JP2012254888A (en) * | 2011-06-07 | 2012-12-27 | Sumitomo Electric Ind Ltd | Apparatus and method for manufacturing optical fiber preform |
| CN202558771U (en) * | 2011-12-31 | 2012-11-28 | 四川大学 | Drawing system of multi-core laser fibers |
| CN204640565U (en) * | 2015-05-14 | 2015-09-16 | 湖北新华光信息材料有限公司 | Optical glass bar groover |
| CN105328516B (en) * | 2015-11-18 | 2018-03-30 | 广东工业大学 | The dynamic magnetic field of magnetic rheologic flexible polishing pad is from sharp burnishing device and its polishing method |
| CN106737115A (en) * | 2017-01-17 | 2017-05-31 | 郑州科技学院 | A kind of preform polishes cabinet |
| CN106584262A (en) * | 2017-01-17 | 2017-04-26 | 郑州科技学院 | Optical fiber preformed rod polishing workpiece clamp |
| CN106695568A (en) * | 2017-01-17 | 2017-05-24 | 郑州科技学院 | Optical fiber preform rod polishing solution circulating system |
| CN206436143U (en) * | 2017-01-17 | 2017-08-25 | 郑州科技学院 | A kind of preform polishes fluid circulation |
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