Processing device for polygonal optical fiber preform

Abstract

The utility model relates to the technical field of quartz glass bar processing equipment, and provides a polygonal optical fiber preform processing device which comprises a machine tool body, a processing assembly and a transmission system, a first clamping part and a second clamping part are arranged in the axial direction of the machine tool body in a spaced mode. The machining assembly comprises a base, an index plate and machining units, the base is arranged on the machine tool body in a sliding mode, the index plate is fixedly arranged on the base, the middle of the index plate is provided with a through hole allowing a workpiece to pass through, and the multiple sets of machining units are arranged on the periphery of the through hole; the transmission system is arranged on the machine tool body and is in transmission connection with the base so as to drive the base to move in the axial direction of the machine tool body. Due to the fact that the multiple machining units are arranged on the index plate, machining of multiple faces can be achieved at a time, axial machining of the whole workpiece can be achieved through the arrangement of the transmission system, continuous clamping in the machining process is avoided, the machining technology is simplified, and the machining quality and the working efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of quartz glass rod processing equipment, and in particular to a processing device for polygonal optical fiber preforms. Background Technology

[0002] The shape of the inner cladding of an active optical fiber is a crucial parameter affecting pump efficiency. Different cladding shapes result in varying numbers of times the pump light traverses the fiber core, leading to significant differences in pump efficiency. Initially, the inner cladding was designed as a circle, geometrically concentric with the fiber core. This ideal symmetrical structure resulted in numerous spirals in the pump light, which propagated within the cladding but bypassed the core, resulting in extremely low pump efficiency.

[0003] Polygonal cladding structures, such as hexagonal and octagonal ones, break rotational symmetry, avoiding the generation of spiral light within the cladding and thus improving pump absorption efficiency. Simultaneously, their structural similarity to circles facilitates mode field matching with pump light exhibiting circular symmetry, thereby enhancing pump coupling efficiency.

[0004] In related technologies, the common method for manufacturing quartz rods into polygonal preforms is to first manufacture a circular master rod, and then grind it into a polygon. A polygonal master rod has multiple faces, and each face needs to be processed sequentially. This processing method has low efficiency, and the master rod needs to be re-clamped and corrected when processing each face. Inspection and correction are also required during the processing to prevent inconsistencies between the processed faces, resulting in low overall processing efficiency, poor processing consistency, and high cost. Utility Model Content

[0005] This invention provides a processing device for polygonal optical fiber preforms, which solves the defects of cumbersome forming and processing technology, low processing efficiency and low processing quality in the prior art, and realizes efficient and high-quality forming and processing.

[0006] This utility model provides a processing device for polygonal optical fiber preforms, comprising: a machine tool body, a processing assembly, and a transmission system; the machine tool body is axially spaced with a first clamping part and a second clamping part for clamping workpieces; the processing assembly includes a base, an indexing plate, and processing units, the base is slidably disposed on the machine tool body and located between the first clamping part and the second clamping part, the indexing plate is fixedly disposed on the base, the center of the indexing plate has a through hole for accommodating the workpiece, and a plurality of processing units are disposed around the through hole, the processing units being used for contact processing with the workpiece; the transmission system is disposed on the machine tool body and is connected to the base for driving the base to move axially along the machine tool body.

[0007] The processing device for polygonal optical fiber preforms provided by this utility model further includes an intermediate support part, which is fixedly disposed on the base and spaced apart from the indexing plate.

[0008] According to the processing device for polygonal optical fiber preforms provided by this utility model, a plurality of processing units are disposed on one side of the indexing plate, and the plurality of processing units are evenly spaced along the circumferential direction.

[0009] According to the processing device for polygonal optical fiber preforms provided by this utility model, a portion of the processing units are located on one side of the indexing plate, and the remaining portion of the processing units are located on the other side of the indexing plate.

[0010] According to the processing device for polygonal optical fiber preforms provided by this utility model, the processing unit includes a mounting base, a grinding wheel, a driving device, and a sliding structure. The driving device and the grinding wheel are both mounted on the mounting base. The driving device is connected to the grinding wheel for transmission and is used to drive the grinding wheel to rotate. The mounting base is slidably connected to the indexing plate through the sliding structure. The indexing plate is provided with a driving mechanism, which is used to drive the mounting base to move radially on the indexing plate.

[0011] According to the processing device for polygonal optical fiber preforms provided by this utility model, the sliding structure includes a guide rail and a slider device. The guide rail is disposed on the indexing plate and arranged radially along the indexing plate. The slider device is slidably connected to the guide rail. The mounting seat is connected to the slider so that the mounting seat moves radially along the indexing plate under the drive of the slider.

[0012] According to the processing device for polygonal optical fiber preforms provided by this utility model, the machine tool body is provided with a sliding rail, and the base is slidably engaged with the sliding rail.

[0013] According to the processing device for polygonal optical fiber preforms provided by this utility model, the first clamping part is fixedly disposed at one end of the machine tool body, and the second clamping part is slidably engaged with the sliding track.

[0014] According to the processing device for polygonal optical fiber preforms provided by this utility model, both the first clamping part and the second clamping part are three-jaw chuck structures, and the central axes of the first clamping part, the second clamping part and the indexing plate are collinear.

[0015] According to the processing device for polygonal optical fiber preforms provided by this utility model, the transmission system includes a lead screw transmission mechanism, the lead screw transmission mechanism includes a drive motor and a lead screw, the lead screw is rotatably mounted on the machine tool body and threadedly connected to the base, the drive motor is connected to the lead screw, and the drive motor is used to drive the lead screw to rotate.

[0016] This utility model provides a processing device for polygonal optical fiber preforms. By setting multiple processing units on the indexing plate, it can process multiple surfaces at one time. Furthermore, the transmission system enables the processing of the entire workpiece along its axis, avoiding the need for continuous clamping during processing, simplifying the processing technology, and improving processing quality and work efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the processing device provided by this utility model.

[0019] Figure 2 This is one of the structural schematic diagrams of the processing components in the processing device provided by this utility model.

[0020] Figure 3 This is a schematic diagram of the processing unit in the processing device provided by this utility model.

[0021] Figure 4 This is the second schematic diagram of the processing components in the processing device provided by this utility model.

[0022] Figure 5 This is the third schematic diagram of the processing components in the processing device provided by this utility model.

[0023] Figure 6 This is the fourth schematic diagram of the processing components in the processing device provided by this utility model.

[0024] Figure label:

[0025] 10. Machine tool body; 11. Sliding rail; 12. First clamping part; 13. Second clamping part; 20. Machining assembly; 21. Indexing plate; 22. Machining unit; 221. Mounting base; 222. Drive device; 223. Grinding wheel; 224. Sliding structure; 2241. Guide rail; 2242. Slider device; 23. Base; 30. Transmission system; 31. Drive motor; 32. Lead screw. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of clarifying the embodiments of this utility model 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 utility model. 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.

[0028] In the description of the embodiments of this utility model, 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 utility model according to the specific circumstances.

[0029] In this embodiment of the utility model, unless otherwise explicitly 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 indicates 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 indicates that the first feature is at a lower horizontal level than the second feature.

[0030] 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 present invention. 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, without contradiction, 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.

[0031] In related technologies, quartz rods need to be processed face by face when fabricating into multi-faceted columnar structures. This requires multiple unloading and clamping, which leads to a cumbersome overall process and low processing efficiency. Furthermore, the repeated clamping increases the risk of a decline in processing quality.

[0032] Regarding the problems in related technologies, such as Figures 1-3As shown, this embodiment provides a processing device for polygonal optical fiber preforms, including a machine tool body 10, a processing component 20, and a transmission system 30. The machine tool body 10 is axially spaced with a first clamping part 12 and a second clamping part 13 for clamping workpieces. The processing component 20 includes a base 23, an indexing plate 21, and processing units 22. The base 23 is slidably disposed on the machine tool body 10 and located between the first clamping part 12 and the second clamping part 13. The indexing plate 21 is fixedly disposed on the base 23. The center of the indexing plate 21 has a through hole for accommodating the workpiece. Multiple processing units 22 are disposed around the through hole. The processing units 22 are used for contact processing with the workpiece. The transmission system 30 is disposed on the machine tool body 10 and is connected to the base 23 for driving the base 23 to move axially along the machine tool body 10. Before processing, the quartz rod is a cylindrical structure, which needs to be processed into a polygonal prism structure. In this embodiment, a part of the workpiece (i.e., the quartz rod) is located in the through hole and is processed simultaneously by multiple processing units 22. This avoids the need for repeated positioning when processing each side, simplifies the processing technology, and improves processing efficiency.

[0033] Specifically, the machine tool body 10 has a platform structure for carrying and processing workpieces, and the processing assembly 20 and the transmission system 30 are mounted on the platform structure. In the processing assembly 20, multiple processing units 22 are provided on the indexing plate 21. The multiple processing units 22 can simultaneously process the bar stock, thereby achieving simultaneous processing of multiple surfaces.

[0034] The first clamping part 12 and the second clamping part 13 are used to clamp the two ends of the bar, thereby maintaining the stability of the bar and facilitating the processing assembly 20 to perform processing operations. That is, the first clamping part 12 and the second clamping part 13 can stably fix the bar between the two clamping parts, and the processing assembly 20 is located between the two clamping parts, thereby enabling the processing operation of the bar.

[0035] It is understandable that the first clamping part 12 and the second clamping part 13 can fix the bar. After the bar is fixed, the processing assembly 20 can perform processing operations on the bar. During the processing operation, since multiple processing units 22 are provided on the indexing plate 21, multiple surfaces can be processed at one time, which simplifies the processing steps and improves processing efficiency and processing quality.

[0036] In a specific configuration, the machine tool body 10 is provided with a sliding rail 11, the base 23 is slidably engaged with the sliding rail 11, the first clamping part 12 is fixedly disposed at one end of the machine tool body 10, and the second clamping part 13 is slidably engaged with the sliding rail 11. The rod-shaped workpiece has a certain length in the axial direction, and the entire workpiece needs to be machined during processing. In this embodiment, the base 23 can slide along the sliding rail 11, thereby enabling the overall machining of the workpiece.

[0037] Specifically, the sliding track 11 is arranged along the axial direction of the machine tool body, and the base 23 moves along the sliding track 11 under the drive of the transmission system 30. During the movement, the workpiece is processed as a whole, which improves the processing efficiency and enables the simultaneous processing of multiple surfaces, thus improving the consistency of workpiece processing.

[0038] Furthermore, the second clamping part 13, through its sliding engagement with the sliding rail 11, allows for flexible switching when clamping workpieces of different lengths. That is, workpieces of different specifications have different lengths. In this embodiment, the second clamping part 13 can move away from or towards the first clamping part 12 manually or automatically. During the process of moving closer to or away from the first clamping part 12, different workpiece lengths can be clamped, thereby fixing the workpiece.

[0039] In specific applications, the bottom of the second clamping part 13 is provided with a slider structure. The slider structure is a hydraulically driven slider in conventional technology. The slider structure slides in cooperation with the sliding guide rail 2241, thereby realizing the control of the movement of the second clamping part 13.

[0040] In a specific configuration, both the first clamping part 12 and the second clamping part 13 are three-jaw chuck structures, and the central axes of the first clamping part 12, the second clamping part 13, and the indexing plate 21 are collinear. The three-jaw chuck structure facilitates workpiece clamping and maintains workpiece stability. Furthermore, by aligning the central axes of the first clamping part 12, the second clamping part 13, and the indexing plate 21, the machining quality of the workpiece can be ensured.

[0041] Specifically, both the first clamping part 12 and the second clamping part 13 are equipped with a three-jaw chuck. The three-jaw chuck is connected to the machine tool body 10 through a support frame. The first clamping part 12 is fixedly connected to the machine tool body 10 through the support frame, and the second clamping part 13 is slidably connected to the machine tool body 10 through the support frame. Furthermore, the bottom of the support frame of the second clamping part 13 is equipped with a slider structure, thereby achieving sliding engagement with the sliding guide rail 2241 through the slider structure.

[0042] It is understood that the first clamping part 12, the second clamping part 13 and the indexing plate 21 form the main structure of the device. The indexing plate 21 is located between the first clamping part 12 and the second clamping part 13, and multiple sets of processing units 22 are provided on the indexing plate 21, so that the workpiece can be processed quickly through multiple sets of processing units 22.

[0043] According to the processing device for polygonal optical fiber preforms provided by this utility model, the transmission system 30 includes a lead screw transmission mechanism, which includes a drive motor 31 and a lead screw 32. The lead screw 32 is rotatably mounted on the machine tool body 10 and threadedly connected to the base 23. The drive motor 31 is connected to the lead screw 32 and is used to drive the lead screw 32 to rotate. The stable movement of the base 23 can be achieved through the transmission connection of the lead screw 32, thereby driving the indexing plate 21 and the processing unit 22 on the indexing plate 21 to move, ultimately realizing the processing of the workpiece.

[0044] Specifically, the bottom of the base 23 is provided with a threaded sleeve, which is threadedly engaged with the lead screw 32. The drive motor 31 is located at one end of the machine tool body 10, and the output end of the drive motor 31 is connected to the lead screw 32. Thus, when the drive motor 31 rotates, it drives the lead screw 32 to rotate. The lead screw 32 engages with the threaded sleeve to drive the axial movement of the base 23. Specifically, the drive motor 31 can be a stepper motor or a servo motor, thereby enabling precise control of the feed rate and feed speed, and thus enabling precise machining of the entire workpiece.

[0045] It is understandable that, in addition to the aforementioned screw drive mechanism, it can also be driven directly by a linear motor or hydraulic device. For example, by connecting the piston rod of the cylinder to the base 23, the cylinder can be moved by air pressure, thereby driving the base 23 to move axially along the main body of the airport. This arrangement makes the overall device simpler, and of course, the screw drive mechanism is more stable when the bar is long.

[0046] According to some embodiments of this utility model, the processing device further includes an intermediate support portion, which is fixedly disposed on the base 23 and spaced apart from the indexing plate 21. When the bar is long, the bar in the middle part may bend. In this embodiment, the intermediate support portion is provided so that a support point can be formed between the first clamping portion 12 and the second clamping portion 13, thereby achieving effective support for the bar and improving the processing quality.

[0047] Specifically, the indexing plate 21 is located at one end of the base 23, and the intermediate support is located at the other end of the base 23. This allows the entire structure to move when the base 23 moves, providing intermediate support for the workpiece in the processing section and improving the stability of the bar support.

[0048] like Figure 2 , Figure 4 As shown, in some embodiments, multiple processing units 22 are all disposed on one side of the indexing plate 21, and the multiple processing units 22 are evenly spaced along the circumferential direction. Disposing of multiple processing units 22 on the same side of the indexing plate 21 makes the overall arrangement more compact and facilitates the placement of the processing units 22.

[0049] Specifically, the indexing plate 21 has a disc-shaped structure, and multiple processing units 22 are arranged on the same surface, which facilitates processing and preparation. Specifically, as shown... Figure 2 As shown, the processing unit 22 consists of three groups, which are evenly spaced on the same surface of the indexing plate 21. That is, the included angle between adjacent processing units 22 is 120 degrees. This method enables the processing of triangular prisms from bar stock. Of course, it can also be done as follows... Figure 4 As shown, there are four processing units 22, which are evenly spaced. The specific number of processing units 22 can be set according to specific needs.

[0050] According to some embodiments provided by this utility model, such as Figure 5 , Figure 6 As shown, some processing units 22 are located on one side of the indexing plate 21, and the remaining processing units 22 are located on the other side of the indexing plate 21. In this embodiment, by distributing multiple indexing plates 21 on both sides of the indexing plate 21, this method is beneficial for multi-faceted processing, enabling simultaneous processing of multiple sides of the workpiece.

[0051] Specifically, the indexing plate 21 has processing units 22 on both sides, and the processing units 22 on the two sides are alternately arranged on the circumference, so that the processing units 22 on both sides are arranged on the same projected circumference.

[0052] like Figure 5 , Figure 6 As shown, in some embodiments, the number of processing units 22 on both surfaces is the same, and the processing units 22 on each surface are evenly arranged on the indexing plate 21. Of course, the number of processing units 22 on the two surfaces of the indexing plate 21 can be different.

[0053] It is understandable that the space on one side of the indexing plate 21 is limited. In this embodiment, by setting processing units 22 on both sides of the indexing plate 21, more processing units 22 can be arranged in the limited space, thereby meeting the need for processing more sides at the same time.

[0054] According to some embodiments provided by this utility model, the processing unit 22 includes a mounting base 221, a grinding wheel 223, a driving device 222, and a sliding structure 224. Both the driving device 222 and the grinding wheel 223 are mounted on the mounting base 221. The driving device 222 is connected to the grinding wheel 223 via a transmission connection, and is used to drive the grinding wheel 223 to rotate. The mounting base 221 is slidably connected to the indexing plate 21 via the sliding structure 224. A driving mechanism (not shown in the figure) is provided inside the indexing plate, which is used to drive the mounting base 221 to move radially within the indexing plate 21. During the processing of each side of the workpiece, the assembly needs to advance radially along the workpiece to achieve processing of a certain depth plane. In this embodiment, the sliding structure 224 guides the movement of the mounting base 221, enabling it to stably reciprocate radially along the indexing plate 21. The driving mechanism drives the movement of the mounting base 221, thus enabling operation under different depth plane requirements.

[0055] Specifically, the drive mechanism is a threaded drive mechanism, which is located within the indexing plate 21 and is connected to each mounting base 221 via a transmission connection. This allows the mounting base 221 to move when the threaded drive mechanism is rotated externally. A sliding structure 224 is located on the indexing plate 21 and is arranged radially along the indexing plate 21. The sliding structure 224 guides the radial movement of the mounting base 221, thereby enabling the feeding of the grinding wheel 223. Controlling the feed amount of the grinding wheel 223 allows for control of the depth of the machined surface on the workpiece, thus adapting to machining different sizes and specifications.

[0056] The thread drive mechanism is similar to that found in conventional three-jaw chucks (not shown in the figure). For ease of understanding, the thread drive mechanism will be described in detail, but it should be understood that even without illustrations, those skilled in the art should be clear about its specific configuration. Specifically, it includes an annular chuck and drive teeth. One side of the chuck is machined with a toothed structure, and the other side has a flat thread. The drive teeth are radially arranged and mesh with the toothed structure of the chuck. The mounting base 221 engages with the flat thread, causing it to drive the teeth to rotate under external force, thereby rotating the chuck and subsequently moving the mounting base 221.

[0057] Understandably, the drive mechanism allows for coordinated control of the extension or retraction of the grinding wheel 223 on each processing unit 22, enabling adaptability to various processing specifications. For example... Figure 6 As shown, three processing units 22 are provided on both sides of the indexing plate 21. This allows one processing unit 22 to be opened for processing when processing a triangular prism, and both processing units 22 to be opened for processing when processing a hexagonal prism. This setting can adapt to various specifications and improve its versatility.

[0058] In some embodiments, the sliding structure 224 includes a guide rail 2241 and a slider device 2242. The guide rail 2241 is disposed on the indexing plate 21 and arranged radially along the indexing plate 21. The slider device 2242 is slidably connected to the guide rail 2241, and the mounting base 221 is connected to the slider. Under the drive of the threaded drive mechanism, the mounting base 221 moves along the arrangement direction of the guide rail 2241 (i.e., the radial direction of the indexing plate 21).

[0059] Specifically, the guide rail 2241 and the slider device 2242 form a guide rail 2241 slider mechanism similar to that in conventional technology. The slider device 2242 is a non-powered slider that can move along the guide rail 2241, thereby causing the mounting base 221 to move along the guide rail.

[0060] Through the above description of the embodiments, those skilled in the art can clearly understand that by setting multiple processing units 22 on the indexing plate 21 in each embodiment, multiple surfaces can be processed at one time, and the entire workpiece axial processing can be achieved through the transmission system 30, avoiding the need for continuous clamping during processing, simplifying the processing technology, and improving processing quality and work efficiency.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A processing apparatus for polygonal optical fiber preforms, characterized in that, include: The machine tool body is provided with a first clamping part and a second clamping part for clamping workpieces at axial intervals. The processing assembly includes a base, an indexing plate, and processing units. The base is slidably disposed on the machine tool body and located between the first clamping part and the second clamping part. The indexing plate is fixedly disposed on the base. The middle part of the indexing plate has a through hole for accommodating the workpiece. Multiple processing units are arranged around the through hole. The processing units are used to contact and process the workpiece. A transmission system is provided on the machine tool body and is connected to the base for driving the base to move axially along the machine tool body.

2. The processing apparatus for polygonal optical fiber preforms according to claim 1, characterized in that, It also includes an intermediate support part, which is fixedly mounted on the base and spaced apart from the indexing plate.

3. The processing apparatus for polygonal optical fiber preforms according to claim 1, characterized in that, The processing units are all located on one side of the indexing plate, and the processing units are evenly spaced along the circumferential direction.

4. The processing apparatus for polygonal optical fiber preforms according to claim 1, characterized in that, A portion of the processing units are located on one side of the indexing plate, and the remaining portion of the processing units are located on the other side of the indexing plate.

5. The processing apparatus for polygonal optical fiber preforms according to claim 3 or 4, characterized in that, The processing unit includes a mounting base, a grinding wheel, a driving device, and a sliding structure. The driving device and the grinding wheel are both mounted on the mounting base. The driving device is connected to the grinding wheel in a transmission manner and is used to drive the grinding wheel to rotate. The mounting base is slidably connected to the indexing plate via the sliding structure. The indexing plate is provided with a driving mechanism, which is used to drive the mounting base to move radially on the indexing plate.

6. The processing apparatus for polygonal optical fiber preforms according to claim 5, characterized in that, The sliding structure includes a guide rail and a slider device. The guide rail is disposed on the indexing plate and arranged radially along the indexing plate. The slider device is slidably connected to the guide rail. The mounting base is connected to the slider so that the mounting base moves radially along the indexing plate under the drive of the slider.

7. The processing apparatus for polygonal optical fiber preforms according to claim 1, characterized in that, The machine tool body is provided with a sliding rail, and the base slides in conjunction with the sliding rail.

8. The processing apparatus for polygonal optical fiber preforms according to claim 7, characterized in that, The first clamping part is fixedly disposed at one end of the machine tool body, and the second clamping part is slidably engaged with the sliding rail.

9. The processing apparatus for polygonal optical fiber preforms according to claim 8, characterized in that, Both the first clamping part and the second clamping part are three-jaw chuck structures, and the central axes of the first clamping part, the second clamping part and the indexing plate are collinear.

10. The processing apparatus for polygonal optical fiber preforms according to claim 1, characterized in that, The transmission system includes a lead screw transmission mechanism, which includes a drive motor and a lead screw. The lead screw is rotatably mounted on the machine tool body and threadedly connected to the base. The drive motor is connected to the lead screw and is used to drive the lead screw to rotate.

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