A device for fusion polishing of a core rod of an optical fiber preform
By using an automated fiber optic preform core welding and polishing device, the positions of the core and the torch are precisely controlled by a drive mechanism and limit switches, achieving efficient and uniform welding and polishing, thus solving the problems of low welding efficiency and poor product consistency in existing technologies.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YANGTZE OPTICAL FIBRE QIANJIANG LTD CO
- Filing Date
- 2025-07-18
- Publication Date
- 2026-07-21
AI Technical Summary
The existing optical fiber preform core rods have low splicing efficiency and poor finished product consistency. Manual operation makes it difficult to accurately control splicing parameters and flame polishing process.
An automated fiber optic preform core welding and polishing device is adopted, including a fixed clamping assembly, a moving clamping assembly, and a torch assembly. The core position and torch movement are precisely controlled by a drive mechanism and limit switches. Combined with a diameter measuring instrument and a control system, automated welding and polishing are achieved.
This improved splicing efficiency and finished product consistency, ensuring high-quality splicing and polishing of optical fiber preform cores and solving the problem of poor finished product consistency.
Smart Images
Figure CN224530831U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of optical fiber manufacturing technology, specifically to an optical fiber preform core splicing and polishing device. Background Technology
[0002] In the field of optical fiber manufacturing, optical fiber preforms are stretched to form core rods. However, some core rods, due to internal defects or substandard optical parameters, need to be slit and re-fused into core rods of standard length. Flame polishing technology is then used to remove surface impurities and minor defects to meet high-precision optical performance requirements.
[0003] Currently, traditional fusion splicing lathes generally rely on manual operation of the moving end chuck and the position of the blowtorch. However, manual operation makes it difficult to accurately control the parameters during the fusion process, resulting in low fusion efficiency and poor product consistency. Furthermore, in the flame polishing stage, it is difficult for humans to achieve stable control of the blowtorch position and flame intensity, which makes it impossible to guarantee the uniformity of the core rod surface polishing, seriously affecting the overall quality of optical fiber products.
[0004] Therefore, it is necessary to improve existing technologies. Summary of the Invention
[0005] The purpose of this invention is to provide an optical fiber preform core splicing and polishing device to address the shortcomings of existing technologies, thereby solving the problem of low splicing efficiency in existing technologies.
[0006] The technical solution adopted in this utility model is: an optical fiber preform core splicing and polishing device, including a worktable, and a fixed snap-fit assembly, a movable snap-fit assembly and a blowtorch assembly disposed on the worktable; The fixed clamping assembly includes a fixed base mounted on the workbench and a first chuck disposed on the fixed base; the first chuck is used to clamp the first mandrel. The movable clamping assembly includes a first driving mechanism, a movable base, and a second chuck; the driving end of the first driving mechanism is connected to the movable base, the second chuck is fixed on the movable base, and the second chuck is used to clamp the second mandrel, the second mandrel being coaxial with the first mandrel; The first driving mechanism drives the movable seat to move the second chuck and the second mandrel along the axis of the second mandrel; the movable seat is equipped with a first limit switch, which is located on the worktable and the position of the first limit switch matches the welding position of the second mandrel. The blowtorch assembly includes a second drive mechanism, a bracket, and a blowtorch mounted on the bracket; the bracket is located between a fixed snap-fit assembly and a movable snap-fit assembly, and the second drive mechanism drives the bracket to move the blowtorch on the worktable along the axis of the first core rod; the bracket is equipped with a third limit switch, which is located on the worktable and its position matches the working position of the blowtorch.
[0007] According to the above scheme, the movable seat is also equipped with a second limit switch, which is located on the worktable and its position matches the heating and melting position of the second core rod.
[0008] According to the above scheme, the bracket is also equipped with a start displacement switch and a stop displacement switch, both of which are located on the worktable.
[0009] According to the above scheme, the first driving mechanism and the second driving mechanism are both gear and rack transmission groups driven by motors, including motors, gears and racks. The motor shaft of the motor is connected to the gear shaft, the gear meshes with the rack set on the worktable, and the length direction of the rack is adapted to the axial direction of the first mandrel.
[0010] According to the above scheme, the first drive mechanism drives the movable seat to move; the motor and gear of the first drive mechanism are both installed inside the movable seat, the lower end of the movable seat is open, and the lower part of the gear passes through the movable seat and meshes with the rack on the worktable.
[0011] According to the above scheme, the second drive mechanism drives the bracket to move; the motor and gear of the second drive mechanism are both installed inside the bracket, the lower end of the bracket is open, and the lower part of the gear passes through the bracket and meshes with the rack on the worktable.
[0012] According to the above scheme, both the motors of the first drive mechanism and the second drive mechanism are equipped with torque control switches.
[0013] According to the above scheme, the first chuck and the second chuck are respectively equipped with a transmission mechanism. The transmission mechanism includes a pneumatic motor, a clutch, a drive gear and a driven gear. The output end of the pneumatic motor is connected to the axle of the drive gear through the clutch. The drive gear meshes with the driven gear, and the driven gear is fixed to the drive disc of the corresponding chuck.
[0014] According to the above scheme, a diameter measuring instrument is installed on the bracket; the diameter measuring instrument and the blowtorch are arranged in a staggered manner on the bracket.
[0015] According to the above scheme, the blowtorch is provided in two sets, which are located on both sides of the mandrel.
[0016] The beneficial effects of this utility model are as follows: This utility model is designed with a moving seat that drives the second core rod to move and a bracket that drives the torch to move. The moving position is limited by the corresponding limit switch, which eliminates the need for manual adjustment. Compared with the prior art, it eliminates the need for manual operation of the moving end chuck and torch position, thereby improving the fusion splicing efficiency. At the same time, the fusion splicing and polishing consistency is good and the reliability is high, thus improving the fusion splicing and polishing quality of the optical fiber preform core rod and solving the problem of poor finished product consistency. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present invention.
[0018] Figure 2 This is a side view of the diameter measuring instrument and blowtorch arrangement in this embodiment.
[0019] Figure 3 This is a schematic diagram of the arrangement of the rotating mechanism in this embodiment.
[0020] The components are as follows: 1. Pneumatic motor; 2. Clutch; 3. Drive gear; 4. First chuck; 5. Diameter gauge; 6. First mandrel; 7. Blowtorch; 8. Adjusting nut; 9. Second mandrel; 10. Moving seat; 11. Worktable; 12. Bracket; 13. Fixed seat; 14. Second chuck; 15. Starting displacement switch; 16. Third limit switch; 17. Ending displacement switch; 18. Second limit switch; 19. First limit switch; 20. Support; 21. Rotary motor; 22. First sprocket drive group; 23. Drive shaft; 24. Second sprocket drive group. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0022] In the description of the embodiments of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0023] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.
[0024] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0025] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples, without contradiction. Additionally, the term "a plurality of" indicates two or more.
[0026] like Figure 1The diagram illustrates an optical fiber preform core splicing and polishing device for splicing and polishing a first core 6 and a second core 9. The device includes a worktable 11, and a fixed clamping assembly, a movable clamping assembly, and a blowtorch assembly mounted on the worktable 11. The fixed clamping assembly includes a fixed base 13 mounted on the workbench 11, and a first chuck 4 disposed on the fixed base 13; the first chuck 4 is used to clamp the first mandrel 6. The movable clamping assembly includes a first driving mechanism, a movable base 10, and a second chuck 14; the driving end of the first driving mechanism is connected to the movable base 10, the second chuck 14 is fixed on the movable base 10, and the second chuck 14 is used to clamp the second core rod 9, the second core rod 9 being coaxial with the first core rod 6. The first driving mechanism drives the moving seat 10 to move the second chuck 14 and the second mandrel 9 along the axis of the second mandrel 9, so that the second mandrel 9 approaches the first mandrel 6 to reach the heating and melting position and the welding position, or moves away from the second mandrel 9; the moving seat 10 is equipped with a first limit switch 18, which is located on the worktable 11, and the position of the first limit switch 18 matches the welding position of the second mandrel 9; The blowtorch assembly includes a second drive mechanism, a bracket 12, and a blowtorch 7 mounted on the bracket 12. The bracket 12 is located between a fixed locking assembly and a movable locking assembly. The second drive mechanism drives the bracket 12 to move the blowtorch 7 along the axis of the first core rod 6 on the worktable 11, so that the blowtorch 7 moves to the working position. The bracket 12 is equipped with a third limit switch 16, which is located on the worktable 11 and the position of the third limit switch 16 matches the working position of the blowtorch 7.
[0027] In this utility model, the first core rod 6 is fixed, and the first driving mechanism drives the moving seat 10 to move the second core rod 9 closer to the first core rod 6. The moving seat 10 stops when it senses the first limit switch 18, at which point the second core rod 9 is in the welding position. The second driving mechanism drives the bracket 12 to move the blowtorch 7 to the third limit switch 16, at which point the blowtorch 7 is in the working position and is activated to heat and melt the first core rod 6 and the second core rod 9.
[0028] In this utility model, the workbench 11 is supported by a support 20 at its bottom, and a diagonal brace is provided between the bottom of the workbench 11 and the support 20.
[0029] Preferably, the movable seat 10 is further equipped with a second limit switch 19, which is located on the worktable 11. The position of the second limit switch 19 matches the heating and melting position of the second mandrel 9. When the movable seat 10 moves to the point where it senses the second limit switch 19, it stops. At this time, the second mandrel 9 is in the heating and melting position, and the blowtorch 7 in the working position heats and melts the mandrel.
[0030] Preferably, the bracket 12 is further equipped with a start displacement switch 15 and a stop displacement switch 17, both of which are located on the worktable 11. Both the start displacement switch 15 and the stop displacement switch 17 are proximity switches used to limit the displacement at both ends of the bracket 12.
[0031] In this invention, the positions of the first limit switch 18 and the second limit switch 19 are determined by the positional requirements of the first core rod 6 and the second core rod 9 during welding. When the welding end face of the second core rod 9 is 10mm away from the welding end face of the first core rod 6, the second core rod 9 is in the heating and melting position, which is the set position corresponding to the second limit switch 19. At this time, the blowtorch 7 heats and melts the welding end faces of the two core rods. When the second core rod 9 moves to contact the end face of the first core rod 6 for welding, the second core rod 9 is in the welding position, which is the set position corresponding to the first limit switch 18. The positions of the starting displacement switch 15 and the ending displacement switch 17 of the bracket 12 are designed according to the preheating length of the first core rod 6 and the second core rod 9. The position of the third limit switch 16 on the worktable 11 is determined according to the working position of the blowtorch 7 (that is, the position where the blowtorch 7 heats and melts the core rods).
[0032] The structure and working principle of each switch in this invention are existing and will not be described in detail here.
[0033] In this utility model, both the first driving mechanism and the second driving mechanism are gear and rack transmission groups driven by a motor; specifically, they include a motor, a gear and a rack. The motor shaft of the motor is connected to the gear shaft, the gear meshes with the rack set on the worktable 11, and the length direction of the rack is adapted to the axial direction of the first mandrel 6.
[0034] In this utility model, the first driving mechanism drives the movable seat 10 to move; the motor and gear of the first driving mechanism are both installed inside the movable seat 10, the lower end of the movable seat 10 is open, and the lower part of the gear passes through the movable seat 10 and meshes with the rack on the worktable 11.
[0035] In this utility model, the second drive mechanism drives the bracket 12 to move; the motor and gear of the second drive mechanism are both installed inside the bracket 12, the lower end of the bracket 12 is open, and the lower part of the gear passes through the bracket 12 and meshes with the rack on the worktable 11. Preferably, both the motors of the first and second drive mechanisms are equipped with torque control switches. If the motor torque exceeds the set torque (torque greater than 2 NM) during the welding process, the motor will stop running and sound an alarm to avoid excessive pressure on the end face of the second mandrel 9 during the welding process, which could cause welding deformity.
[0036] In this utility model, the first chuck 4 and the second chuck 14 have the same structure, both including a drive disk and several jaws mounted on the drive disk. When the drive disk rotates, it can drive several jaws to move radially at the same time. When several jaws move radially inward at the same time, they clamp the mandrel. When they move radially outward at the same time, they release the mandrel, thereby realizing the clamping and releasing of the mandrel.
[0037] In this utility model, the first chuck 4 and the second chuck 14 are respectively equipped with transmission mechanisms. Both of them achieve clamping and loosening of the mandrel through the transmission mechanism. Specifically, the transmission mechanism includes a pneumatic motor 1, a clutch 2, a driving gear 3 and a driven gear. The output end of the pneumatic motor 1 is connected to the axle of the drive gear 3 via the clutch 2. The drive gear 3 meshes with the driven gear, and the driven gear is fixed to the drive disc of the corresponding chuck. When the driven gear rotates, the drive disc of the corresponding chuck rotates accordingly, and then the first mandrel 6 or the second mandrel 9 is clamped and released by the radial movement of the chuck jaws.
[0038] In this invention, the first chuck 4 and the second chuck 14 are connected to the same rotating mechanism, such as... Figure 3As shown, the rotating mechanism includes a rotary motor 21, a first sprocket drive group 22, a drive shaft 23, and two second sprocket drive groups 24. The motor shaft of the rotary motor 21 is connected to the input end of the first sprocket drive group 22, and the output end of the first sprocket drive group 22 is connected to the drive shaft 23. The drive shaft 23 is located inside the worktable 11 and is connected to the input ends of the two second sprocket drive groups 24. The output ends of the two second sprocket drive groups 24 are respectively connected to the first chuck 4 and the second chuck 14. Each of the two sprocket drive groups includes a driving sprocket, a driven sprocket, and a chain connecting the driving sprocket and the driven sprocket. The driving sprocket of the first sprocket drive group 22 is mounted on the motor shaft of the rotary motor 21. The driven sprocket of the first sprocket drive group 22 and the driving sprocket of the second sprocket drive group 24 are both mounted on the drive shaft 23. The driven sprocket of the second sprocket drive group 24 is mounted on the corresponding chuck. The rotary motor 21 of the rotating mechanism drives the transmission shaft 23 to rotate via the first sprocket transmission group 22. The transmission shaft 23 synchronously drives the first chuck 4 and the second chuck 14 to rotate via the second sprocket transmission group 24, thereby causing the mandrel clamped on the first chuck 4 and the second chuck 14 to rotate and be heated evenly. In this utility model, the first chuck 4, the second chuck 14, and their corresponding rotating mechanisms are all existing mature equipment, and their functions and working principles are existing and not improvements of this application, so they will not be described in detail here.
[0039] Preferably, the bracket 12 is provided with a diameter gauge 5 for detecting the outer diameter data of the mandrel; the diameter gauge 5 and the blowtorch 7 are staggered on the bracket 12 to reduce the influence of the blowtorch 7 flame on the diameter gauge 5.
[0040] In this invention, there are two sets of diameter gauges 5, located on both sides of the mandrel, and the two diameter gauges 5 work together; the diameter gauges 5 are installed away from the working range of the chuck rotation to avoid accidental contact with the diameter gauges 5 when the chuck rotates; for example Figure 2 As shown, there are two sets of blowtorches 7, which are located on both sides of the mandrel. The blowtorches 7 are arranged opposite each other at an elevation angle of 45° to 60° to avoid the flame affecting the blowtorches 7.
[0041] This utility model also includes a control system, which receives the mandrel outer diameter data from the diameter measuring instrument 5 and calculates the working position of the blowtorch 7, as well as the heating and melting position and welding position of the second chuck 14. During the welding process, the control system automatically selects the process for welding and polishing based on the mandrel diameter scanned by the diameter measuring instrument 5. The system controls the rotation speed of the chuck, the polishing travel speed, the polishing travel direction, and the gas flow rate according to the process to achieve automatic welding and polishing functions.
[0042] Example like Figure 1The optical fiber preform core splicing and polishing device shown includes a worktable 11, on which a fixed base 13, a bracket 12, and a movable base 10 are arranged. A first chuck 4 and a second chuck 14 are respectively arranged on the fixed base 13 and the movable base 10. The clamping and releasing principles of the two chucks are the same. Taking the first chuck 4 as an example, a pneumatic motor 1 is connected to a clutch 2, and the gear (i.e., the driving gear 3) at the output end of the clutch 2 meshes with the driven gear on the first chuck 4, driving the drive plate of the first chuck 4 to rotate forward and backward, so that several jaws of the first chuck 4 move radially synchronously to achieve the purpose of clamping and releasing. The driving air source of the pneumatic motor 1 is about 5 bar, and the forward and reverse rotation of the pneumatic motor 1 is controlled by a three-position five-way valve. The clutch 2 is controlled by a 24V relay to be energized and engaged (input shaft and output shaft synchronous), and disengaged when de-energized (output shaft can rotate freely). The drive relay of the clutch 2 is interlocked with the rotation control start and stop relay of the corresponding chuck to ensure that the clutch 2 and the chuck do not work at the same time, avoiding damage to the mechanical structure caused by simultaneous start-up. Both the movable seat 10 and the bracket 12 are driven by corresponding drive mechanisms to move left and right on the worktable 11. The motors of the drive mechanisms are also equipped with torque control switches. If the torque of the drive mechanism motor of the movable seat 10 or the bracket 12 exceeds the set torque during the welding process, the motor will stop running and sound an alarm. After the chuck clamps the mandrel, the operator can adjust the mandrel level by adjusting the nut 8 of the corresponding chuck jaws according to the runout feedback value of the diameter gauge 5 during the mandrel's rotation (this is an existing method and will not be described in detail here). The contact part between the adjusting nut 8 and the mandrel is made of Teflon material, which can prevent scratching the mandrel during the adjustment process.
[0043] The working principle of this utility model is as follows: 1. Mandrel mounting: Install the first mandrel 6 on the first chuck 4 and the second mandrel 9 on the second chuck 14. The operator presses and holds the clamping button on the corresponding chuck, and the pneumatic motor 1 drives the clutch 2, which in turn drives the chuck to clamp the mandrel. After the mandrel is fixed, rotate the chuck and adjust the adjusting nut 8 at the end of the chuck according to the mandrel runout value fed back by the diameter gauge 5 until the mandrel runout meets the welding requirements, thus completing the mandrel mounting.
[0044] 2. Preliminary preheating of the mandrel: The operator ignites the blowtorch 7, and the first chuck 4 and the second chuck 14 drive the mandrel to rotate according to the set speed and direction. At the same time, the bracket 12 returns to the starting position (located at the starting displacement switch 15), driving the diameter gauge 5 and the blowtorch 7 to move from the starting position to the ending position (located at the ending displacement switch 17). The diameter gauge 5 scans the outer diameter of the mandrel within the stroke range, while the blowtorch 7 performs preliminary preheating of the mandrel. The bracket 12 stops after sensing the ending displacement switch 17, and the pre-scanning and preliminary preheating are completed. 3. Mandrel heating and melting: The bracket 12 moves the blowtorch 7 to the working position (stops when the third limit switch 16 is sensed), and the moving seat 10 moves the second mandrel 9 to the heating and melting position (stops when the second limit switch 19 is sensed). At this time, the distance between the welding end faces of the first mandrel 6 and the second mandrel 9 is 10mm. The blowtorch 7 turns to high flame to fully heat the welding end faces of the mandrel. After heating for the set time, the end faces of the first mandrel 6 and the second mandrel 9 are in a molten state. 4. Core rod welding: The moving base 10 drives the second core rod 9 to the welding position (stops when the first limit switch 18 is sensed), and it makes full contact with the welding end face of the first core rod 6. The blowtorch 7 continues to burn the welding while maintaining a high flame. After the set time, the welding of the two core rods is completed. 5. Polishing: The blowtorch 7 is switched to polishing mode, and the flame of the blowtorch 7 is converted to the flame size required for polishing. The bracket 12 carries the blowtorch 7 and continuously moves back and forth between the starting position (corresponding to the starting displacement switch 15) and the ending position (corresponding to the ending displacement switch 17) to polish the mandrel. When the set number of polishing times is reached, the flame of the blowtorch 7 is turned off. After the mandrel cools down, the chuck rotation stops, and the formula is finished. The mandrel is then manually re-supported.
[0045] The contents not described in detail in this specification are existing technologies known to those skilled in the art.
[0046] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A fiber optic preform core splicing and polishing device, characterized in that, Includes a worktable, and fixed latching components, movable latching components and blowtorch components mounted on the worktable; The fixed clamping assembly includes a fixed base mounted on the workbench and a first chuck disposed on the fixed base; the first chuck is used to clamp the first mandrel. The movable clamping assembly includes a first driving mechanism, a movable base, and a second chuck; the driving end of the first driving mechanism is connected to the movable base, the second chuck is fixed on the movable base, and the second chuck is used to clamp the second mandrel, the second mandrel being coaxial with the first mandrel; The first driving mechanism drives the movable seat to move the second chuck and the second mandrel along the axis of the second mandrel; the movable seat is equipped with a first limit switch, which is located on the worktable and the position of the first limit switch matches the welding position of the second mandrel. The blowtorch assembly includes a second drive mechanism, a bracket, and a blowtorch mounted on the bracket; the bracket is located between a fixed snap-fit assembly and a movable snap-fit assembly, and the second drive mechanism drives the bracket to move the blowtorch on the worktable along the axis of the first core rod; the bracket is equipped with a third limit switch, which is located on the worktable and its position matches the working position of the blowtorch.
2. The optical fiber preform core splicing and polishing apparatus as described in claim 1, characterized in that, The movable base is also equipped with a second limit switch, which is located on the worktable and its position matches the heating and melting position of the second mandrel.
3. The optical fiber preform core splicing and polishing apparatus as described in claim 2, characterized in that, The bracket is also equipped with a start displacement switch and a stop displacement switch, both of which are located on the worktable.
4. The optical fiber preform core splicing and polishing apparatus as described in claim 3, characterized in that, Both the first and second drive mechanisms are gear and rack transmission groups driven by motors, including a motor, a gear and a rack. The motor shaft of the motor is connected to the gear shaft, the gear meshes with the rack set on the worktable, and the length direction of the rack is adapted to the axial direction of the first mandrel.
5. The optical fiber preform core splicing and polishing apparatus as described in claim 4, characterized in that, The first drive mechanism drives the movable seat to move; the motor and gear of the first drive mechanism are both installed inside the movable seat, the lower end of the movable seat is open, and the lower part of the gear passes through the movable seat and meshes with the rack on the worktable.
6. The optical fiber preform core splicing and polishing apparatus as described in claim 4 or 5, characterized in that, The second drive mechanism drives the bracket to move; the motor and gear of the second drive mechanism are both installed inside the bracket, the lower end of the bracket is open, and the lower part of the gear passes through the bracket and meshes with the rack on the worktable.
7. The optical fiber preform core splicing and polishing apparatus as described in claim 6, characterized in that, Both the motors of the first and second drive mechanisms are equipped with torque control switches.
8. The optical fiber preform core splicing and polishing apparatus as described in claim 3, characterized in that, The first chuck and the second chuck are respectively equipped with a transmission mechanism, which includes a pneumatic motor, a clutch, a drive gear and a driven gear; the output end of the pneumatic motor is connected to the axle of the drive gear through the clutch, the drive gear meshes with the driven gear, and the driven gear is fixed to the drive disc of the corresponding chuck.
9. The optical fiber preform core splicing and polishing apparatus as described in claim 8, characterized in that, A diameter gauge is installed on the bracket; the diameter gauge and the blowtorch are staggered on the bracket.
10. The optical fiber preform core splicing and polishing apparatus as described in claim 1, characterized in that, The blowtorch is provided in two sets, which are located on both sides of the mandrel.