Continuous diameter-reducing forming device for quartz glass rods

Abstract

This invention discloses a continuous diameter reduction forming device for quartz glass rods, relating to the field of quartz glass rod processing technology. It includes an operating table, with a set of transmission components installed on the front and rear sides of the operating table's upper surface. Between the two sets of transmission components, from front to back, are sequentially arranged an electrofusion box, an air-cooling box, and a conductive track assembly. A quartz glass rod body passes through the electrofusion box. The inner cavity of the electrofusion box is provided with a first limiting ring, and the inner cavity of the conductive track assembly is provided with a second limiting ring. An adjustment mechanism is provided on one side of each of the first and second limiting rings. Continuous diameter reduction is achieved through the transmission components, the electrofusion box, and the air-cooling box. During diameter reduction, the first limiting ring simultaneously presses out annular protrusions as a source of compensating material. The second limiting ring, equipped with an S-shaped heat-conducting pipe, rotates and heats the protrusions, melting and uniformly coating them to achieve dimensional repair and automatically fill micro-defects, improving the uniformity and density of the wall thickness in the diameter reduction section.

Description

Technical Field

[0001] This invention belongs to the field of quartz glass rod processing technology, and relates to a continuous diameter reduction forming device for quartz glass rods. Background Technology

[0002] Quartz glass rods are an important inorganic non-metallic material with excellent properties such as high temperature resistance, corrosion resistance, good light transmittance, and high mechanical strength. They are widely used in optical communication, semiconductors, optical instruments, new energy and other fields. In the production and processing of quartz glass rods, diameter reduction forming is a key process. Its purpose is to process large-diameter quartz glass rods into small-diameter glass rods of different diameter specifications to meet the needs of different application scenarios. Currently, the electrofusion method is a common process that uses high-temperature electric arc heating to locally melt and soften quartz glass rods, followed by mechanical stretching to reduce their diameter. This process has become the mainstream processing method for mid-to-high-end quartz rod products due to its advantages such as fast heating rate, concentrated heat-affected zone, and minimal damage to the properties of the quartz rod base material. The typical process of traditional electrofusion diameter reduction is as follows: the two ends of a quartz rod are fixed by a clamp, the section to be reduced is sent into the electrofusion chamber, the high temperature arc generated by the electrode is used to raise the local temperature to 1750-1850℃, after the quartz rod is in a high viscosity molten state, the traction mechanism applies axial tension to complete the diameter reduction, and then the finished product is obtained by natural cooling or air cooling. However, in actual operation, the quartz glass rod in the molten section is in a high-temperature state during the diameter reduction process. Under high temperature, the material melts and flows due to heat. During the diameter reduction process, due to the influence of its own gravity, the shape of the diameter reduction section will be slightly bent or eccentric. Especially in continuous production, this instability will be amplified, affecting the dimensional accuracy and pass rate of the product. In addition, in traditional processes, quartz rods are directly cooled and shaped after diameter reduction. Due to the thermal expansion of the material in the high-temperature molten state, a certain volume shrinkage will occur during the phase transition to the solid state. This can easily lead to diameter deviations in the quartz glass rods after diameter reduction, further aggravating dimensional errors and reducing the product qualification rate. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a continuous diameter reduction forming device for quartz glass rods. The technical solution of the present invention addresses the problem that the solutions of the prior art are too simple and solves the problem mentioned in the background art that the diameter reduction process of existing quartz glass rods is subject to the influence of its own gravity and the thermal expansion and contraction of the material, which ultimately leads to the deviation of the diameter reduction area size.

[0004] The quartz glass rod continuous diameter reduction forming device of the present invention includes an operating table. A set of transmission components is installed on the front and rear sides of the upper surface of the operating table. Between the two sets of transmission components, an electro-melting box, an air-cooling box and a conductive track assembly are arranged sequentially from front to back. A quartz glass rod body passes through the electro-melting box. The inner cavity of the electrofusion box is provided with a first limiting ring, and the inner cavity of the conductive track assembly is provided with a second limiting ring. A set of adjustment mechanisms is provided on one side of the first limiting ring and the second limiting ring respectively. The first limiting ring is used to assist in limiting the diameter reduction section of the quartz glass rod body, and to form multiple annular protrusions on the outer surface of the diameter reduction section. The second limiting ring can heat and melt multiple annular protrusions and evenly coat them onto the outer surface of the reduced diameter section to compensate for the dimensional error of the reduced diameter section after cooling by the air-cooling box.

[0005] The transmission assembly includes two meshing pinions, each pinion having a transmission wheel fixedly connected to its back. The quartz glass rod body is located between the two transmission wheels, and the output shaft of a drive motor is fixedly inserted into the inner wall of one of the pinions.

[0006] The electrofusion box is divided into a working area and an assembly area by a partition plate. The assembly area is equipped with a spiral heating tube, and the first limiting ring is located at the end of the working area. The first limiting ring is composed of four first arc-shaped blocks, and the inner wall of the first arc-shaped block is set as a curved surface structure, and several grooves are opened on the inner wall of the first arc-shaped block.

[0007] The adjustment mechanism includes a rotating ring with four inclined slots. A lever is slidably connected in each inclined slot. An external gear ring is rotatably connected to the outer wall of the rotating ring. A drive gear is meshed on one side of the external gear ring. The output shaft of a servo motor is fixedly inserted into the inner wall of the drive gear. One end of one of the levers is fitted with the piston rod of a cylinder.

[0008] The external gear ring is fixedly connected to a fixing ring. The inner wall of the fixing ring is provided with a straight sliding groove corresponding to the position of the lever. The fixing ring near the first limiting ring is rotatably connected to the inner wall of the electrofusion box, and the fixing ring near the second limiting ring is rotatably connected to the operating table through a mounting bracket.

[0009] The second limiting ring is composed of four second arc-shaped blocks, and the inner wall of the second arc-shaped blocks is designed as a curved surface structure; The interior of the two second arc-shaped blocks is separated into a first section and a second section by a baffle. The first section is equipped with an S-shaped heat-conducting pipe, and the second section is used to collect residual material. A scraper is installed between the two second arc-shaped blocks, and the scraper has an opening in the middle.

[0010] The lever on the side closer to the first limiting ring passes through the corresponding straight slide groove and is fixedly connected to the first arc-shaped block. The lever on the side closer to the second limiting ring passes through the corresponding straight slide groove and is fixedly connected to the second arc-shaped block.

[0011] The conductive track assembly includes two annular metal tracks, each containing two metal telescopic rods that are slidably connected. One of the two metal telescopic rods in the annular metal track is fixedly inserted into one end of two S-shaped heat-conducting pipes, and the other two metal telescopic rods in the annular metal track are fixedly inserted into the other end of two S-shaped heat-conducting pipes.

[0012] Compared with the prior art, the beneficial effects of the present invention are: This invention constructs a multi-station continuous processing system that integrates heating and softening, diameter reduction forming, air cooling and shaping, and dynamic repair. By arranging an electrofusion box, an air cooling box, and a conductive track assembly sequentially on the operating table, and coordinating with two sets of transmission components to control the feeding rhythm of the quartz glass rod body, it realizes continuous operation from raw material input to finished product output. The front transmission component actively stretches during the electrofusion stage to cooperate with heating and diameter reduction, while the rear component starts synchronously after cooling, pushing the diameter-reduced section into the subsequent cooling and repair areas in sequence, thereby improving processing efficiency and avoiding the energy waste and dimensional deviation accumulation problems caused by frequent loading and unloading in traditional intermittent processing. A first limiting ring consisting of four first arc-shaped blocks is set at the end of the electrofusion box. The opening and closing of the four first arc-shaped blocks are controlled by the rear adjustment mechanism to realize flexible adjustment and dynamic rotation of the limiting inner diameter. The servo motor drives the outer gear ring to rotate the fixed ring, so that the first limiting ring performs dynamic diameter reduction processing on the softened quartz glass rod body while limiting and rotating in the closed state. This effectively avoids bending or eccentricity problems caused by its own gravity and further improves the diameter reduction accuracy. The inner wall of the first arc-shaped block is provided with an annular groove. During the dynamic extrusion process, multiple annular protrusions are precisely pressed into the surface of the diameter reduction section. These serve as the pre-embedded material source for subsequent size compensation. This abandons the traditional passive error tolerance method that relies on expanding the limiting hole, and instead adopts a strategy of actively reserving microstructures. This not only ensures the initial diameter reduction accuracy, but also provides sufficient molten raw material reserves for subsequent repair processes, so that the subsequent compensation process can complete the error correction without adding additional materials. The aforementioned annular protrusion is used as a compensating material for directional heating and melting. The S-shaped heat-conducting pipe and scraper structure are integrated using the second limiting ring to melt and coat the compensating material. The S-shaped heat-conducting pipe is dynamically powered through a double-ring metal track and a telescopic conductive rod to ensure continuous heating during rotation. Molten quartz can automatically fill the narrowing section, achieving dimensional compensation after the quartz glass rod body cools down, increasing the density of the narrowing section and making its wall thickness more uniform. The uniform strengthening layer formed after cooling can reduce the risk of edge chipping and breakage during the processing of quartz glass rod bodies that require secondary processing, such as cutting and drilling. It can also efficiently collect excess material, prevent contamination, and scrape off excess molten material and collect it in the second section to prevent molten material from dripping and contaminating the equipment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0014] Figure 2 This is a cross-sectional view of the electrofusion box structure of the present invention.

[0015] Figure 3 This is a schematic diagram of the connection structure between the adjustment mechanism and the first limiting ring of the present invention.

[0016] Figure 4 This is a schematic diagram of the connection structure between the lever and the first arc-shaped block of the adjustment mechanism of the present invention.

[0017] Figure 5 This is a schematic diagram of the rear structure of the adjustment mechanism of the present invention.

[0018] Figure 6 This is a schematic diagram of the structure after the first limiting ring and the quartz glass rod body of the present invention are separated.

[0019] Figure 7 This is a cross-sectional view of the adjustment mechanism of the present invention, showing the structure of the lever and the second arc-shaped block.

[0020] Figure 8 This is a schematic cross-sectional view of two of the second arc-shaped blocks in this invention.

[0021] Figure 9 This is a schematic diagram of the structure of the two second arc-shaped blocks after being separated from the scraper in cross-sectional view.

[0022] Figure 10 This is a diagram showing the working state of the metal telescopic rod and the annular metal track of the present invention.

[0023] In the diagram: 1. Control panel; 2. Transmission components; 201. Pinion; 202. Transmission wheel; 203. Drive motor; 3. Electrofusion box; 301. Work area; 302. Assembly area; 303. Spiral heating tube; 4. Air-cooled box; 5. Conductive track assembly; 501. Circular metal track; 502. Metal telescopic rod; 6. Quartz glass rod body; 7. Adjustment mechanism; 701. Rotary ring; 702. Inclined groove; 703. Lever; 704. External gear ring; 705. Drive gear; 706. Servo motor; 707. Cylinder; 708. Fixed ring; 8. First arc-shaped block; 9. The second arc-shaped block; 10. Scraper; 11. First interval; 12. Second interval; 13. S-shaped heat pipe. Detailed Implementation

[0024] Example 1 like Figures 1-10 As shown, the quartz glass rod continuous diameter reduction forming device of the present invention includes an operating table 1. A set of transmission components 2 are respectively installed on the front and rear sides of the upper surface of the operating table 1. Between the two sets of transmission components 2, an electro-melting box 3, an air-cooling box 4 and a conductive track assembly 5 are arranged sequentially from front to back. A quartz glass rod body 6 passes through the electro-melting box 3. The inner cavity of the electric melting box 3 is provided with a first limiting ring, and the inner cavity of the conductive track assembly 5 is provided with a second limiting ring. A set of adjustment mechanisms 7 are respectively provided on one side of the first limiting ring and the second limiting ring. The first limiting ring is used to assist in limiting the diameter reduction section of the quartz glass rod body 6, and to form multiple annular convex strips on the outer surface of the diameter reduction section. The second limiting ring can heat and melt the multiple annular convex strips and evenly coat them onto the outer surface of the diameter reduction section to compensate for the dimensional error of the diameter reduction section after cooling by the air-cooling box 4. By sequentially arranging the electro-melting box 3, the air-cooling box 4, and the conductive track assembly 5 on the operating table 1, and coordinating with the two sets of transmission assemblies 2 to control the feeding rhythm of the quartz glass rod body 6, a continuous operation from raw material input to finished product output is realized. By setting a first limiting ring with a forming pattern inside the electric melting box 3, multiple annular convex strips are formed on the surface of the diameter reduction section, achieving precise reservation of cold shrinkage compensation material. The second limiting ring integrates a heating function, which can directionally melt the annular convex strips to achieve size compensation of the quartz glass rod body 6 after cooling. This abandons the traditional passive compensation approach of expanding the size of the limiting ring, and uses the annular convex strips reserved in the first limiting ring as the source of compensation material to achieve precise size repair. Furthermore, during the subsequent repair process, the molten quartz can automatically fill the surface microcracks and internal microbubbles generated by the stretching of the narrowed section, thereby increasing the density of the narrowed section. By utilizing the self-flowing characteristics of the molten material, it can correct the uneven wall thickness defect, making the wall thickness more uniform. The uniform strengthening layer formed after cooling can reduce the risk of edge chipping and breakage during the processing of the quartz glass rod body 6, which requires secondary processing such as cutting and drilling.

[0025] Example 2 In this embodiment, as Figure 1 As shown, the transmission assembly 2 includes two meshing pinions 201, and a transmission wheel 202 is fixedly connected to the back of each pinion 201. The quartz glass rod body 6 is located between the two transmission wheels 202, and the output shaft of the drive motor 203 is fixedly inserted into the inner wall of one of the pinions 201. It should be noted that after the drive motor 203 starts, its output shaft drives the pinion 201 fixed thereto to rotate. Through the meshing transmission of the two pinions 201, the two transmission wheels 202 achieve synchronous rotation in opposite directions. Since the quartz glass rod body 6 is clamped between the two transmission wheels 202, when the transmission wheels 202 rotate, they can stably drive the quartz glass rod body 6 to be continuously transported along its axial direction through the friction force with the outer surface of the quartz glass rod body 6. The two sets of transmission components 2 have the same transmission direction, ensuring that the quartz glass rod body 6 passes through the electro-melting box 3, the air-cooling box 4 and the conductive track component 5 in sequence at a set speed, providing stable feed power for the continuous diameter reduction forming process. The value of the drive motor 203 is adjusted so that the quartz glass rod body 6 stops in the inner cavity of the electro-melting box 3, the air-cooling box 4 and the conductive track component 5 to perform different processing operations. In addition, when the electrofusion box 3 begins the diameter reduction operation, the transmission component 2 located at the front side remains stationary while the transmission component 2 at the rear side reverses the transmission, pulling the quartz glass rod body 6 forward. This, combined with the heating and stretching action within the electrofusion box 3, achieves the initial diameter reduction of the quartz glass rod body 6. After the diameter reduction is completed, the transmission component 2 at the front side continues to drive forward, while the transmission component 2 at the rear side starts synchronously, sending the diameter-reduced section into the air-cooling box 4 for initial cooling. A pipe is inserted into one side of the air-cooling box 4, extending into the interior of the operating table 1. A fan is installed inside the operating table 1. After the fan starts, it blows room temperature air into the air-cooling box 4 through the pipe to rapidly cool the diameter-reduced section, allowing it to initially solidify and set, preparing it for subsequent secondary repair work.

[0026] Example 3 In this embodiment, as Figure 2 and Figure 3As shown, the interior of the electrofusion box 3 is divided into a working area 301 and an assembly area 302 by a partition plate. The assembly area 302 is equipped with a spiral heating tube 303, and the first limiting ring is located at the end of the working area 301. The first limiting ring is composed of four first arc-shaped blocks 8, and the inner wall of the first arc-shaped block 8 is set as a curved surface structure, and several grooves are opened on the inner wall of the first arc-shaped block 8. It should be noted that the electric melting box 3 is divided into two spaces by a partition plate. The spiral heating tube 303 is evenly distributed in the assembly area 302 in a spiral shape. After the power is turned on, it can quickly generate high temperature and heat the work area 301 through heat radiation and heat conduction, and heat the quartz glass rod body 6 inside it to soften it. The first limiting ring is located at the end of the working area 301. When the quartz glass rod body 6 enters the electrofusion box 3 under the drive of the transmission component 2 and is heated and softened, it will gradually move towards the end of the working area 301. At this time, the first limiting ring begins to act on its diameter reduction section. The first limiting ring is composed of four first arc-shaped blocks 8 to form a complete circular limiting structure. The curved surface structure of its inner wall can play a good guiding and limiting role for the glass rod during the diameter reduction process, preventing it from bending or deviating. The several grooves opened on the inner wall will press out corresponding annular convex strips on the outer surface of its diameter reduction section when the quartz glass rod body 6 passes through the first limiting ring. The height and width of these annular convex strips can be designed according to the actual diameter reduction requirements and subsequent compensation amount, providing a sufficient material basis for subsequent dimensional error compensation.

[0027] Example 4 In this embodiment, as Figure 4 , Figure 5 and Figure 6 As shown, the adjustment mechanism 7 includes a rotating ring 701, which has four inclined slots 702. A lever 703 is slidably connected in each inclined slot 702. An external gear ring 704 is rotatably connected to the outer wall of the rotating ring 701. A drive gear 705 is meshed on one side of the external gear ring 704. The output shaft of a servo motor 706 is fixedly inserted into the inner wall of the drive gear 705. One end of one of the levers 703 is fitted with the piston rod of the cylinder 707; The external gear ring 704 is fixedly connected to a fixing ring 708. The inner wall of the fixing ring 708 is provided with a straight sliding groove corresponding to the position of the lever 703. The fixing ring 708 near the first limiting ring is rotatably connected to the inner wall of the electrofusion box 3. The fixing ring 708 near the second limiting ring is rotatably connected to the operating table 1 through the mounting bracket. The second limiting ring is composed of four second arc-shaped blocks 9, and the inner wall of the second arc-shaped blocks 9 is designed as a curved surface structure; The interiors of the two second arc-shaped blocks 9 are separated into a first section 11 and a second section 12 by a baffle. An S-shaped heat-conducting pipe 13 is laid in the first section 11, and the second section 12 is used to collect residual material. A scraper 10 is installed between the two second arc-shaped blocks 9, and the scraper 10 has an opening in the middle. The lever 703 on the side closer to the first limiting ring passes through the corresponding straight slide groove and is fixedly connected to the first arc block 8. The lever 703 on the side closer to the second limiting ring passes through the corresponding straight slide groove and is fixedly connected to the second arc block 9. It should be noted that the adjustment mechanism 7 is used to adjust the inner diameter of the first limiting ring and the second limiting ring. The cylinder 707 is fixedly installed on one side of the outer gear ring 704 and is equipped with an independent small power supply and cylinder 707 controller to precisely control the extension and retraction time of the piston rod of the cylinder 707. The cylinder 707 controls one of the levers 703 to slide back and forth. When the lever 703 slides along the inclined groove 702, it will drive the rotating ring 701 to rotate. The lever 703 near the first limiting ring passes through the corresponding straight groove and is fixedly connected to the first arc block 8. When the rotating ring 701 at this position rotates, it can drive the four first arc blocks 8 to retract or expand. When expanded, the internal space is large, which allows the unheated part of the quartz glass rod body 6 to pass through smoothly. When retracted, the inner wall of the four first arc blocks 8 fits the softened diameter reduction section of the quartz glass rod body 6 and an annular protrusion is pressed on its surface. The inner diameter of the first limiting ring after retraction can be customized according to the different diameters of the quartz glass rod body 6. Furthermore, after the first arc-shaped block 8 retracts, the servo motor 706 drives the drive gear 705 to rotate. The drive gear 705 meshes with the outer gear ring 704. At this time, the cylinder 707 controls the position of the lever 703 to remain unchanged, the outer gear ring 704 rotates, and the fixed ring 708 fixedly connected to the outer gear ring 704 rotates synchronously. The straight groove on the inner wall of the fixed ring 708 rotates together with the fixed ring 708, thereby driving the lever 703 that passes through the straight groove to move. The four first arc-shaped blocks 8 as a whole begin to rotate. During the limiting process, they rotate simultaneously. Compared with the static limiting mode, this dynamic limiting scheme can make the forming of the diameter reduction section of the quartz glass rod body 6 more uniform, effectively avoiding bending or eccentricity caused by its own gravity, further improving the diameter reduction accuracy. In addition, during the rotation process, the groove presses the annular convex strip more fully, and the cross-sectional shape of the convex strip is more regular, providing more favorable conditions for subsequent repair work. In addition, for example Figure 7 , Figure 8 and Figure 9The second limiting ring is composed of four second arc-shaped blocks 9. The lever 703 near the second limiting ring is fixedly connected to the second arc-shaped block 9. Therefore, the second arc-shaped block 9 can be closed and opened by adjustment in a similar way to the first limiting ring. When the diameter-reducing section of the quartz glass rod body 6 enters the conductive track assembly 5 after being initially cooled by the air-cooling box 4, the second limiting ring closes, and the curved structure of its inner wall fits the outer surface of the diameter-reducing section. It should be noted that the overall size of the second arc block 9 is slightly larger than that of the first arc block 8, and the size of the corresponding adjustment mechanism 7 on one side is also adjusted accordingly. The inner diameter of the circular channel formed by the two arc blocks is slightly larger than the target size of the quartz glass rod body 6 after the diameter reduction. The inner wall of the second arc block 9 is smooth and does not directly contact the diameter reduction section of the quartz glass rod body 6. In the secondary repair process, the scraper 10 mainly contacts the annular convex strip on the outer surface of the diameter reduction section. When the scraper 10 makes a circular rotation, its circular trajectory is coaxial with the diameter reduction section, and the inner diameter of the circular trajectory matches the target size of the quartz glass rod body 6 after the diameter reduction. In the subsequent repair work, the scraper 10 can be used to repeatedly apply the molten annular convex strip material to automatically distribute it evenly on the surface of the diameter reduction section, ensuring the full utilization of the compensation material and the flatness of the surface. When the servo motor 706 at the rear of the control panel 1 drives the drive gear 705 to rotate, the drive gear 705 drives the outer gear ring 704 meshing with it to rotate synchronously. The outer gear ring 704 then drives the fixed ring 708 fixedly connected to it to rotate. The linear groove on the inner wall of the fixed ring 708 rotates together with the fixed ring 708, thereby driving the lever 703 passing through the linear groove to move, driving the four second arc blocks 9 to perform circular motion. It should be noted that two of the second arc-shaped blocks 9 of the second limiting ring are hollow structures, with the first interval 11 and the second interval 12 separated by baffles inside. The first interval 11 is specifically used to lay the S-shaped heat pipe 13. The S-shaped heat pipe 13 is made of a metal material with a high thermal conductivity. Its curved S-shaped structure can maximize the heat dissipation area within the limited first interval 11, ensuring that the heat is evenly transferred to the second interval 12 and the inner wall of the second arc-shaped block 9. The annular convex strip of the diameter-reducing section of the quartz glass rod body 6 is heated and melted. Through rotational movement, the two second arc-shaped blocks 9 carrying the S-shaped heat pipe 13 can contact the annular convex strip in sequence. The rotational movement transfers heat to the annular convex strip, allowing it to melt fully. Among them, the two second arc-shaped blocks 9 used to collect the excess material are two adjacent second arc-shaped blocks 9, ensuring that the two second arc-shaped blocks 9 are always kept at a high temperature. During the process of heating and melting the annular convex strip, the molten quartz material will flow along the outer surface of the narrowing section under its own gravity and the centrifugal force generated by the rotation of the second arc-shaped blocks 9. At this time, the scraper 10 installed between the two adjacent second arc-shaped blocks 9 begins to play a role. The rotation of the scraper 10 is used to scrape the molten material and scrape off the excess molten material and collect it into the second interval 12, so as to achieve precise trimming of the outer surface of the narrowing section. The rotation trajectory of the scraper 10 is strictly controlled to ensure that the outer surface of the narrowing section after coating reaches the preset target size and smoothness, and at the same time realizes the size compensation of the quartz glass rod body 6 after cooling. In addition, the scraper 10 has an opening in the middle, which is connected to the second section 12 of the second arc block 9 located below. Both second arc blocks 9 have through grooves on the side facing the scraper 10 that correspond to the opening of the scraper 10. When the molten quartz material is thrown out under the action of centrifugal force, the scraper 10 can scrape off the excess molten material and guide it into the second section 12 for collection through the opening and through grooves, so as to avoid the molten material dripping randomly and contaminating the equipment. Furthermore, it should be noted that the scraper 10 has raised baffles on both sides. These baffles are perpendicular to the scraper 10 body and are slightly higher than the scraping surface of the scraper 10. They can provide lateral restraint to the molten material during the scraping process, preventing it from overflowing from both sides of the scraper 10 under the action of centrifugal force, and further improving the efficiency of residual material collection. There is a gap between the bottom of the second arc-shaped block 9 located at the top and the scraper 10. The gap is located on the inside, allowing excess residual material to enter the second interval 12 of the two second arc-shaped blocks 9 through the gap.

[0028] Example 5 In this embodiment, as Figure 10 As shown, the conductive track assembly 5 includes two annular metal tracks 501. Two metal telescopic rods 502 are slidably connected in each annular metal track 501. The two metal telescopic rods 502 in one annular metal track 501 are fixedly inserted into one end of the two S-shaped heat conduction tubes 13, and the two metal telescopic rods 502 in the other annular metal track 501 are fixedly inserted into the other end of the two S-shaped heat conduction tubes 13. It should be noted that the two annular metal tracks 501 are fixed to the table surface of the operating table 1 by two insulating rods, and wires are connected to the outside of the annular metal tracks 501 to the positive and negative terminals of the power supply respectively. The annular metal tracks 501 always remain stationary. The inner side wall is provided with an annular groove that matches the end of the metal telescopic rod 502. One end of the metal telescopic rod 502 is slidably connected to the annular groove through a ball bearing, ensuring that the metal telescopic rod 502 can rotate with the second arc block 9. It can also freely extend and retract and flexibly slide along the annular track to adjust the position when the second arc block 9 is unfolded and retracted. The two ends of the S-shaped heat pipe 13 are fixedly connected to the metal telescopic rods 502 in different annular metal tracks 501. The second arc-shaped block 9 is made of insulating material. It connects the S-shaped heat pipe 13 to the power supply through the annular metal track 501 and the metal telescopic rods 502, and maintains a stable electrical connection with the power supply, thereby continuously providing power to the S-shaped heat pipe 13 to maintain its heating temperature. The dual-track design solves the power supply problem of the second limiting ring during dynamic movement. Through the cooperation of the annular metal track 501 and the metal telescopic rods 502, a reliable conductive connection between the rotating part and the stationary power supply is realized, ensuring the continuity and stability of the heating and melting operation, and avoiding power outages or equipment failures caused by wire entanglement or pulling.

[0029] The descriptions of the orientation and relative positional relationships of the structures in this invention, such as front, back, left, right, up, and down, do not constitute a limitation of this invention, but are merely for the convenience of description.

Claims

1. A continuous diameter reduction forming device for quartz glass rods, comprising an operating table (1), wherein a set of transmission components (2) are respectively installed on the front and rear sides of the upper surface of the operating table (1), characterized in that: Between the two sets of transmission components (2), an electrofusion box (3), an air-cooling box (4) and a conductive track assembly (5) are arranged sequentially from front to back. A quartz glass rod body (6) runs through the electrofusion box (3). The inner cavity of the electric melting box (3) is provided with a first limiting ring, and the inner cavity of the conductive track assembly (5) is provided with a second limiting ring. A set of adjustment mechanisms (7) is provided on one side of the first limiting ring and the second limiting ring respectively. The first limiting ring is used to assist in limiting the diameter reduction section of the quartz glass rod body (6) and to form multiple annular protrusions on the outer surface of the diameter reduction section. The second limiting ring can heat and melt multiple annular protrusions and evenly coat them onto the outer surface of the reduced diameter section to compensate for the dimensional error of the reduced diameter section after cooling by the air-cooled box (4).

2. The continuous diameter reduction forming device for quartz glass rods according to claim 1, characterized in that: The second limiting ring is composed of four second arc-shaped blocks (9), and the inner wall of the second arc-shaped block (9) is set as a curved surface structure; The interior of the two second arc-shaped blocks (9) is separated into a first section (11) and a second section (12) by a baffle. An S-shaped heat pipe (13) is laid in the first section (11), and the second section (12) is used to collect residual material. A scraper (10) is installed between the two second arc-shaped blocks (9), and an opening is provided in the middle of the scraper (10).

3. The continuous diameter reduction forming device for quartz glass rods according to claim 2, characterized in that: The conductive track assembly (5) includes two annular metal tracks (501), and two metal telescopic rods (502) are slidably connected in each annular metal track (501). The two metal telescopic rods (502) in one of the annular metal tracks (501) are fixedly inserted into one end of the two S-shaped heat conduction pipes (13), and the two metal telescopic rods (502) in the other annular metal track (501) are fixedly inserted into the other end of the two S-shaped heat conduction pipes (13).

4. The continuous diameter reduction forming device for quartz glass rods according to claim 1, characterized in that: The transmission assembly (2) includes two meshing pinions (201), and a transmission wheel (202) is fixedly connected to the back of each pinion (201). The quartz glass rod body (6) is located between the two transmission wheels (202), and the output shaft of the drive motor (203) is fixedly inserted into the inner wall of one of the pinions (201).

5. The continuous diameter reduction forming device for quartz glass rods according to claim 1, characterized in that: The interior of the electrofusion box (3) is divided into a working area (301) and an assembly area (302) by a partition plate. The assembly area (302) is equipped with a spiral heating tube (303), and the first limiting ring is located at the end of the working area (301). The first limiting ring is composed of four first arc-shaped blocks (8), and the inner wall of the first arc-shaped block (8) is set as a curved surface structure, and several grooves are opened on the inner wall of the first arc-shaped block (8).

6. The continuous diameter reduction forming device for quartz glass rods according to claim 5, characterized in that: The adjustment mechanism (7) includes a rotating ring (701), which has four inclined slots (702). A lever (703) is slidably connected in each inclined slot (702). An external gear ring (704) is rotatably connected to the outer wall of the rotating ring (701). A drive gear (705) is meshed on one side of the external gear ring (704). The output shaft of a servo motor (706) is fixedly inserted into the inner wall of the drive gear (705). One end of one of the levers (703) is fitted with the piston rod of the cylinder (707).

7. The continuous diameter reduction forming device for quartz glass rods according to claim 6, characterized in that: The external gear ring (704) is fixedly connected to a fixing ring (708). The inner wall of the fixing ring (708) is provided with a straight sliding groove corresponding to the position of the lever (703). The fixing ring (708) near the first limiting ring is rotatably connected to the inner wall of the electrofusion box (3). The fixing ring (708) near the second limiting ring is rotatably connected to the operating table (1) through the mounting bracket.

8. The continuous diameter reduction forming device for quartz glass rods according to claim 6, characterized in that: The lever (703) near the first limiting ring passes through the corresponding straight groove and is fixedly connected to the first arc block (8). The lever (703) near the second limiting ring passes through the corresponding straight groove and is fixedly connected to the second arc block (9).

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