A quartz glass tube drawing apparatus and a clamping control method

Abstract

The application discloses a quartz glass tube stretching device and a clamping control method, relates to the technical field of quartz glass manufacturing, and comprises a linear module assembly which is provided in a symmetrical mode and extends along a first direction; the clamping assembly comprises clamping mechanisms which are respectively in transmission connection with the two groups of linear modules, the clamping mechanisms have clamping portions for clamping the quartz glass tube, and the clamping centers of the clamping portions are coplanar with the axis of the quartz glass tube; the driving assembly is used for respectively driving the two groups of linear modules so that the two groups of linear modules respectively mobilize the clamping mechanisms to move; the control module is electrically connected with the driving mechanism and the clamping mechanisms and is used for controlling the two groups of clamping mechanisms to alternately clamp the quartz glass tube; the linear motion of the linear module replaces the traditional rotary motion of the roller type, the requirement for accurate synchronous speed control between the rollers is avoided, the two groups of clamping mechanisms alternately act on the quartz glass tube, radial deviation of the quartz glass tube can be avoided, and the precision of the quartz glass tube in the stretching process is improved.

Description

Technical Field

[0001] This invention relates to the field of quartz glass manufacturing technology, specifically to a quartz glass tube stretching device and clamping control method. Background Technology

[0002] Existing quartz glass tube stretching devices mainly consist of one or more pairs of rollers. Rubber bushings are typically installed on the rollers to provide heat insulation, increase friction, and reduce scratches on the quartz glass. The stretching mechanism is usually fixedly installed below the furnace outlet. The rollers are driven synchronously in opposite directions by a servo motor connected to a controller, thus forming the quartz glass tube stretching device. When the quartz glass tube has not reached the corresponding roller position, the rollers are in a separated state. When it is necessary to clamp and stretch the glass tube, the left and right rollers close towards the clamping center. The separation and closure are usually driven by a cylinder-driven connecting rod that moves the rollers.

[0003] When stretching a glass tube, the left and right rollers of the roller-type stretching device must contact the glass tube simultaneously and rotate synchronously. Due to processing errors of the rollers and rubber bushings, or differences in the uniformity of the flexible material of the rubber bushings, the outer diameter of the rollers may be incorrect when in contact with the glass tube. This results in a difference in the rotational linear speed of the left and right rollers, which in turn causes radial displacement of the glass tube during stretching, leading to defects such as bending of the glass tube. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a quartz glass tube stretching device and a clamping control method.

[0005] In a first aspect, the present invention provides a quartz glass tube stretching device, comprising:

[0006] A linear module assembly, the linear module assembly comprising two sets of linear modules symmetrically arranged and extending along a first direction;

[0007] A clamping assembly, comprising two clamping mechanisms respectively drivenly connected to two sets of linear modules, wherein each clamping mechanism has a clamping part for clamping the quartz glass tube, and the clamping center of the clamping part is coplanar with the axis of the quartz glass tube;

[0008] A drive assembly, comprising two sets of drive mechanisms respectively connected to two sets of linear modules, wherein the drive mechanisms are used to drive the linear modules to drive the clamping mechanism to reciprocate along the first direction;

[0009] A control module, which is electrically connected to the drive mechanism and the clamping mechanism, is used to control the two sets of clamping mechanisms to alternately clamp the quartz glass tube.

[0010] According to the technical solution provided by the present invention, the clamping mechanism includes:

[0011] A first support frame is connected to the linear module via a transmission.

[0012] A telescopic component is disposed on the first support frame and has a telescopic end that reciprocates along a second direction; the second direction is perpendicular to the first direction.

[0013] A second support frame is disposed at the telescopic end;

[0014] A clamping member is disposed on the side wall of the second support frame, and the clamping member has the clamping portion.

[0015] According to the technical solution provided by the present invention, the clamping part includes two clamping fingers that move relative to each other along a third direction; the third direction is perpendicular to the first direction and perpendicular to the second direction.

[0016] According to the technical solution provided by the present invention, the driving mechanism includes:

[0017] A driving component, the driving component having a driving end, the driving end being connected to the linear module in a transmission manner;

[0018] The controller is electrically connected to the drive unit and to the control module.

[0019] According to the technical solution provided by the present invention, a first limit sensor and a second limit sensor are provided on the linear module, and the first limit sensor is closer to the driving member relative to the second limit sensor.

[0020] According to the technical solution provided by the present invention, the linear module includes:

[0021] A first mounting bracket extends along the first direction; both the first limit sensor and the second limit sensor are mounted on the first mounting bracket.

[0022] A lead screw, which is rotatably disposed inside the first mounting bracket, and the lead screw is connected to the drive end in a transmission manner;

[0023] The slider is threaded onto the lead screw, and the slider and the first mounting bracket are slidably adapted to each other. The first support bracket is disposed on the slider.

[0024] According to the technical solution provided by the present invention, the linear module includes:

[0025] A second mounting bracket extends along the first direction; both the first limit sensor and the second limit sensor are mounted on the second mounting bracket.

[0026] A drive wheel is rotatably mounted on one end of the second mounting bracket near the drive member and is connected to the drive end in a transmission manner;

[0027] Driven wheel, the driven wheel being rotatably disposed at the end of the second mounting bracket away from the driving member;

[0028] A conveyor belt, the drive belt and the driving wheel are connected to the driven wheel, and the first support frame is connected to the conveyor belt.

[0029] Secondly, the present invention provides a clamping control method based on the aforementioned quartz glass tube stretching device, the clamping control method comprising the following steps:

[0030] S01. Before clamping, the control module controls the two sets of clamping mechanisms to be positioned at the first limit sensor and the second limit sensor, respectively.

[0031] S02. After clamping begins, the control module controls the clamping mechanism located at the first limit sensor to move downward until it moves at the same speed as the quartz glass tube, and causes the clamping mechanism to clamp the quartz glass tube. At the same time, the control module controls the clamping mechanism located at the second limit sensor to move upward until it reaches the first limit sensor.

[0032] S03. The control module detects that the clamping mechanism holding the quartz glass tube reaches the second limit sensor, and controls the clamping mechanism located at the first limit sensor to move down until it moves at the same speed as the quartz glass tube and clamps the quartz glass tube.

[0033] S04. The control module controls the clamping mechanism that reaches the second limit sensor to release the clamp on the quartz glass tube and controls it to move upward until it reaches the first limit sensor.

[0034] S05. Repeat steps S03-S04 until the quartz glass tube is produced.

[0035] According to the technical solution provided by the present invention, the upward movement speed of the clamping mechanism is greater than the feeding speed of the quartz glass tube.

[0036] In summary, this invention specifically discloses a quartz glass tube stretching device, comprising a linear module assembly having two sets of linear modules symmetrically arranged and extending along a first direction; a clamping assembly including clamping mechanisms respectively drivenly connected to the two sets of linear modules, each having a clamping part for clamping the quartz glass tube, wherein the clamping center of the clamping part is coplanar with the axis of the quartz glass tube; a drive assembly for driving the two sets of linear modules respectively, causing the two sets of linear modules to respectively adjust the clamping mechanisms to move; and a control module electrically connected to the drive mechanism and the clamping mechanism for controlling the two sets of clamping mechanisms to alternately clamp the quartz glass tube.

[0037] The linear motion of the linear module replaces the traditional roller-type rotary motion, avoiding the requirement for precise synchronous speed control between rollers; the clamping mechanism replaces the roller-pressing clamping method, avoiding the difference in stretching parameters caused by the dimensional errors of the rollers and rubber bushings; and the two sets of clamping mechanisms act alternately on the quartz glass tube, which can prevent the quartz glass tube from radially shifting due to the dimensional errors of the rollers and rubber bushings, and avoid defects such as bending, ellipticity and wall deviation in the quartz glass tube during the stretching process. Attached Figure Description

[0038] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0039] Figure 1 This is a front view of a quartz glass tube stretching device.

[0040] Figure 2 This is a schematic diagram of the overall structure of a quartz glass tube stretching device.

[0041] Figure 3 This is a schematic diagram of the clamping mechanism.

[0042] Figure 4 This is a flowchart of a clamping control method.

[0043] The following are the labels in the diagram: 1. Linear module; 2. Clamping mechanism; 3. Drive mechanism; 4. First support frame; 5. Telescopic component; 6. Second support frame; 7. Clamping component; 8. Clamping finger; 9. Drive component; 10. Controller; 11. First limit sensor; 12. Second limit sensor; 13. Quartz glass tube. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0045] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0046] Example 1

[0047] Existing quartz glass tube stretching devices mainly consist of one or more pairs of rollers. Rubber bushings are typically installed on the rollers to provide heat insulation, increase friction, and reduce scratches on the quartz glass. Alternatively, synchronous belts can be installed on multiple pairs of rollers to form a tracked stretching mechanism. The rollers are driven by a servo motor connected to a controller to rotate synchronously in opposite directions. When the quartz glass tube has not reached the corresponding roller position, the rollers are in a separated state. When the quartz glass tube needs to be clamped and stretched, the left and right rollers close towards the clamping center. During stretching, the left and right rollers must simultaneously contact the quartz glass tube and rotate synchronously. Due to machining errors in the rollers and rubber bushings, or differences in the uniformity of the flexible material of the rubber bushings, the overall outer diameter of the rollers may be incorrect when in contact with the quartz glass tube. This results in a difference in the rotational linear speed of the left and right rollers, further causing radial displacement of the quartz glass tube during stretching, leading to defects such as bending.

[0048] To resolve the above deficiencies, please refer to... Figures 1 to 3 The present invention provides a quartz glass tube stretching device, comprising:

[0049] The linear module assembly includes two sets of linear modules 1 symmetrically arranged and extending along a first direction; the first direction is... Figure 1 In the vertical direction;

[0050] The clamping assembly includes two clamping mechanisms 2 that are respectively drivenly connected to two sets of linear modules 1. Each clamping mechanism 2 has a clamping part for clamping a quartz glass tube 13, and the clamping center of the clamping part is coplanar with the axis of the quartz glass tube 13.

[0051] The drive assembly includes two drive mechanisms 3 that are respectively connected to two linear modules 1. The drive mechanisms 3 are used to drive the linear modules 1 to drive the clamping mechanism 2 to reciprocate along the first direction.

[0052] The control module is electrically connected to the drive mechanism 3 and the clamping mechanism 2, and is used to control the two sets of clamping mechanisms 2 to alternately clamp the quartz glass tube 13.

[0053] Specifically, the linear module 1 extending along the first direction has the same extension direction as the quartz glass tube 13. The two sets of linear modules 1 are symmetrically arranged on both sides of the quartz glass tube 13. The two sets of linear modules 1 are respectively connected to the clamping mechanism 2, thereby realizing the reciprocating motion of the clamping mechanism 2 on the linear module 1 along the first direction to clamp the quartz glass tube 13.

[0054] The drive assembly includes two sets of drive mechanisms 3 that are respectively connected to two sets of linear modules 1. The two sets of drive mechanisms 3 drive the two sets of linear modules 1 respectively, thereby driving the movement of the two sets of clamping mechanisms 2 respectively.

[0055] The control module is electrically connected to the drive mechanism 3 and the clamping mechanism 2 to control the drive mechanism 3 and the clamping mechanism 2, so as to control the two sets of clamping mechanisms 2 to alternately clamp the quartz glass tube 13. Specifically, after the control module controls one set of clamping mechanisms 2 to clamp the quartz glass tube 13, it controls the other set of clamping mechanisms 2 to move until the other set of clamping mechanisms 2 clamps the quartz glass tube 13, and then controls the first set of clamping mechanisms 2 to release the quartz glass tube 13. By having the clamping center of the clamping part and the axis of the quartz glass tube 13 coplanar, the situation of asynchronous contact between the clamping part and the quartz glass tube 13 is avoided during the clamping process. The linear motion of the linear module 1 replaces the traditional roller-type rotational motion, avoiding the requirement for precise synchronous speed control between rollers. It can also avoid radial displacement of the quartz glass tube 13 caused by the dimensional errors of the rollers and rubber bushings, and improve the accuracy of the quartz glass tube 13 in the stretching process.

[0056] Furthermore, the clamping mechanism 2 includes:

[0057] The first support frame 4 is connected to the linear module 1 via a transmission.

[0058] Telescopic component 5 is disposed on the first support frame 4 and has a telescopic end that reciprocates along a second direction; the second direction is perpendicular to the first direction.

[0059] The second support frame 6 is installed at the telescopic end;

[0060] Clamping member 7 is disposed on the side wall of the second support frame 6, and clamping member 7 has a clamping part.

[0061] Specifically, the first support frame 4 is drivenly connected to the linear module 1, and the operation of the linear module 1 can drive the first support frame 4 to reciprocate along a first direction; the telescopic member 5 is disposed on the first support frame 4 and can reciprocate along the first direction with the first support frame 4; the telescopic member 5 has a telescopic end that reciprocates along a second direction, the second direction being perpendicular to the first direction. Figure 1 The direction is perpendicular to the paper surface; the second support frame 6 is provided at the telescopic end, so that the telescopic end can drive the second support frame 6 to reciprocate along the second direction; the clamping member 7 is provided on the side wall of the second support frame 6, so that the clamping member 7 can reciprocate along the second direction with the second support frame 6, and the clamping member 7 has a clamping part for clamping the quartz glass tube 13.

[0062] Therefore, when it is necessary to clamp the quartz glass tube 13, the operation of the linear module 1 drives the first support frame 4 to move along the first direction, thereby driving the telescopic member 5 to move along the first direction. The telescopic end drives the second support frame 6 to move along the second direction, thereby driving the clamping member 7 to move along the second direction and bring it closer to the quartz glass tube 13, thus achieving the clamping of the quartz glass tube 13 with high stability.

[0063] The telescopic component 5 can be a telescopic cylinder; the clamping component 7 can be a clamping cylinder.

[0064] Furthermore, the clamping part includes: two clamping fingers 8 that move relative to each other along a third direction; the third direction is perpendicular to the first direction and perpendicular to the second direction, and the third direction is... Figure 1 Mid-horizontal direction.

[0065] Specifically, the two clamping fingers 8 of the clamping member 7 are distributed along a third direction and are symmetrically arranged about the clamping center. Thus, when the quartz glass tube 13 is clamped by the clamping part, the two clamping fingers 8 move towards each other at the same time, ensuring that they can contact the quartz glass tube 13 synchronously, avoiding the influence of differences in contact time, and improving the accuracy of the quartz glass tube 13.

[0066] It should be noted that the telescopic component 5 is equipped with a first limit switch, which has a first position. When it is necessary to clamp the quartz glass tube 13, the control module controls the telescopic end to extend and drive the clamping component 7 to move. When the telescopic end reaches the first position, the telescopic end stops moving. At this time, the clamping center of the clamping part and the axis of the quartz glass tube 13 are coplanar.

[0067] The first limit switch also has a second position. When it is necessary to release the clamping of the quartz glass tube 13, the control module controls the telescopic end to retract. When the telescopic end reaches the second position, it stops moving. At this time, the clamping part is away from the quartz glass tube 13.

[0068] The clamping component 7 is equipped with a second limit switch, which has a third position. When it is necessary to clamp the quartz glass tube 13, the control module controls the two clamping fingers 8 to move closer to each other. When both clamping fingers 8 move to the third position, they stop moving. At this time, the two clamping fingers 8 clamp the quartz glass tube 13 together.

[0069] The second limit switch is also provided with a fourth position. When it is necessary to release the clamping of the quartz glass tube 13, the control module controls the two clamping fingers 8 to move away from each other, so that the clamping fingers 8 move away from the quartz glass tube 13. The movement stops when both clamping fingers 8 have moved to the fourth position.

[0070] In some embodiments, the position of the telescopic end and the clamping finger 8 is determined using a delayed signal, such as:

[0071] When it is necessary to clamp the quartz glass tube 13, the control module controls the telescopic end to extend. The telescopic end extends for 1 second and then stops. Then the control module controls the two clamping fingers 8 to move closer to each other. The two clamping fingers 8 move for 1 second and then stop. At this time, the clamping of the quartz glass tube 13 is completed.

[0072] When it is necessary to release the clamping of the quartz glass tube 13, the control module controls the two clamping fingers 8 to move away from each other. The two clamping fingers 8 move for 1 second and then stop. Then the control module controls the telescopic end to retract. The telescopic end moves for 1 second and then stops. At this time, the clamping of the quartz glass tube 13 is released.

[0073] Furthermore, the drive mechanism 3 includes:

[0074] The driving component 9 has a driving end, which is connected to the linear module 1 via a transmission; the driving component 9 can be a servo motor.

[0075] The controller 10 is electrically connected to the drive unit 9 and is also electrically connected to the control module.

[0076] Specifically, the controller 10 is electrically connected to the drive unit 9, which can detect the rotation speed of the drive end in real time and calculate the moving speed of the clamping mechanism 2 based on the rotation speed. At the same time, the controller 10 is electrically connected to the control module, which can send commands to make the controller 10 adjust the direction and rotation speed of the drive end, thereby adjusting the moving direction and moving speed of the clamping mechanism 2.

[0077] Furthermore, the linear module 1 is provided with a first limit sensor 11 and a second limit sensor 12, with the first limit sensor 11 being closer to the drive member 9 than the second limit sensor 12.

[0078] Specifically, a first limit sensor 11 and a second limit sensor 12 are provided on both linear modules 1, and the first limit sensor 11 and the second limit sensor 12 of the two linear modules 1 are located on the side of the two linear modules 1 that are far apart from each other; the first limit sensor 11 and the second limit sensor 12 are both electrically connected to the control module and are used to detect the position of the clamping mechanism 2.

[0079] Furthermore, linear module 1 includes:

[0080] A first mounting bracket extends along a first direction; a first limit sensor 11 and a second limit sensor 12 are both mounted on the first mounting bracket.

[0081] The lead screw is rotatably disposed inside the first mounting bracket, and the lead screw is connected to the drive end for transmission.

[0082] The slider is threaded onto the lead screw, and the slider and the first mounting bracket are slidably adapted to each other. The first support bracket 4 is set on the slider.

[0083] Specifically, the lead screw can be connected to the drive end by a worm gear structure. The rotation of the drive end drives the lead screw to rotate, and the first mounting bracket limits the slider, so that the slider can move back and forth along the first mounting bracket, thereby driving the movement of the clamping mechanism 2.

[0084] Furthermore, in some embodiments, the linear module 1 includes:

[0085] A second mounting bracket extends along a first direction; both the first limit sensor 11 and the second limit sensor 12 are mounted on the second mounting bracket.

[0086] The drive wheel is rotatably mounted on one end of the second mounting bracket near the drive component 9 and is connected to the drive end for transmission.

[0087] Driven wheel, the driven wheel is rotatably mounted at the end of the second mounting bracket away from the drive member 9;

[0088] The conveyor belt, drive belt, and drive pulley are connected to the driven pulley via a drive transmission, and the first support frame 4 is connected to the conveyor belt.

[0089] Specifically, the drive wheel and the drive end are connected by a transmission. The drive end rotates to drive the drive wheel to rotate, which in turn causes the driven wheel to rotate through the conveyor belt, thus enabling the clamping mechanism 2 to move.

[0090] For the transmission connection between the drive end and the linear module 1, those skilled in the art can refer to existing technologies, including but not limited to structures that can stably transmit power, such as couplings and reducers, and no specific limitations are made here.

[0091] Example 2

[0092] This embodiment provides a clamping control method, implemented based on the quartz glass tube stretching device provided in Embodiment 1, such as... Figure 4 As shown, this clamping control method includes the following steps:

[0093] S01. Before clamping, the control module controls the two clamping mechanisms 2 to be positioned at the first limit sensor 11 and the second limit sensor 12 respectively.

[0094] Before clamping begins, the operator starts the stretching device. The control module controls the two sets of drive mechanisms 3, so that the two sets of linear modules 1 drive the two sets of clamping mechanisms 2 to move to the positions of the first limit sensor 11 and the second limit sensor 12 respectively. For example, the left clamping mechanism 2 moves up to the position of the first limit sensor 11, and the right clamping mechanism 2 moves down to the position of the second limit sensor 12.

[0095] S02. After clamping begins, the control module controls the clamping mechanism 2 located at the first limit sensor 11 to move downward until it moves at the same speed as the quartz glass tube 13, and the clamping mechanism 2 clamps the quartz glass tube 13. At the same time, the control module controls the clamping mechanism 2 located at the second limit sensor 12 to move upward until it reaches the first limit sensor 11.

[0096] When clamping begins, the control module controls the clamping mechanism 2 on the left side, located at the first limit sensor 11, to accelerate downward movement. Specifically, the control module controls the drive component 9 of the drive mechanism 3 on the left side to rotate, thereby enabling the linear module 1 on the left side to drive the clamping mechanism 2 on the left side to move. This continues until the downward movement speed of the clamping mechanism 2 on the left side is the same as the feeding speed of the quartz glass tube 13. Then, the control module controls the extension end of the telescopic component 5 on the left side to extend. The extension end stops when it reaches the first position. Then, the control module controls the two clamping fingers 8 of the clamping component 7 on the left side to move closer to each other until the two clamping fingers 8 reach the third position. At this time, the clamping mechanism 2 on the left side moves in the same direction and at the same speed as the quartz glass tube 13 while clamping the quartz glass tube 13.

[0097] At the same time, the control module controls the clamping mechanism 2 located on the right side of the second limit sensor 12 to accelerate upward until the clamping mechanism 2 on the right side reaches the first limit sensor 11. The upward movement speed of the clamping mechanism 2 is greater than the feeding speed of the quartz glass tube 13, so it can be ensured that the clamping mechanism 2 on the right side can reach the first limit sensor 11 before the clamping mechanism 2 on the left side reaches the second limit sensor 12.

[0098] S03. The control module detects that the clamping mechanism 2 holding the quartz glass tube 13 has reached the second limit sensor 12, and controls the clamping mechanism 2 located at the first limit sensor 11 to move down until it moves at the same speed as the quartz glass tube 13 and clamps the quartz glass tube 13.

[0099] After the second limit sensor 12 on the left detects the clamping mechanism 2 on the left, it sends a signal to the control module. The control module controls the clamping mechanism 2 on the right to accelerate downward until the downward speed of the clamping mechanism 2 on the right is the same as the feeding speed of the quartz glass tube 13. Then, the control module controls the telescopic end of the telescopic member 5 on the right to extend. The telescopic end stops after reaching the first position. Then, the control module controls the two clamping fingers 8 of the clamping member 7 on the right to move closer to each other until the two clamping fingers 8 reach the third position. At this time, the clamping mechanism 2 on the right moves in the same direction and at the same speed as the quartz glass tube 13 while clamping the quartz glass tube 13.

[0100] S04. The control module controls the clamping mechanism 2, which reaches the second limit sensor 12, to release the clamp on the quartz glass tube 13 and controls it to move upward until it reaches the first limit sensor 11.

[0101] When the two gripping fingers 8 of the right-side clamping member 7 move to the third position, a signal is sent to the control module so that the control module controls the right-side clamping member 7 to stop. At the same time, the control module controls the two gripping fingers 8 of the left-side clamping member 7 to move away from each other to release the quartz glass tube 13. When the two gripping fingers 8 of the left-side clamping member 7 reach the fourth position, the control module controls the left-side telescopic member 5 to retract its telescopic end to the second position. At the same time, the control module controls the left-side drive member 9 to decelerate, stop, and then reverse, driving the left-side clamping mechanism 2 to move up quickly until it reaches the left-side first limit sensor 11.

[0102] S05. Repeat steps S03-S04 until the quartz glass tube 13 is produced.

[0103] When the second limit sensor 12 on the right detects the clamping mechanism 2 on the right, it sends a signal to the control module. The control module controls the drive mechanism 3 on the left to make the linear module 1 on the left drive the clamping mechanism 2 on the left to accelerate downward until it moves in the same direction and at the same speed as the quartz glass tube 13 and clamps the quartz glass tube 13.

[0104] When the control module detects that the left clamping mechanism 2 has completed clamping the quartz glass tube 13, it controls the right clamping member 7 to release the quartz glass tube 13, and then controls the right driving member 9 to decelerate, stop, and then reverse until the right first limit sensor 11 detects the right clamping mechanism 2.

[0105] This cycle is repeated to achieve continuous clamping and stretching of the quartz glass tube 13.

[0106] It should be noted that the upward movement speed of the clamping mechanism 2 needs to be greater than the unloading speed of the quartz glass tube 13 in order to ensure that the clamping mechanism 2 on the other side has reached the first limit sensor 11 before the clamping mechanism 2 clamping the quartz glass tube 13 reaches the second limit sensor 12.

[0107] Meanwhile, the acceleration and deceleration of the drive component 9 require time, which makes the actual stroke of the clamping mechanism 2 greater than the distance between the first limit sensor 11 and the second limit sensor 12.

[0108] Set the distance between the first limit sensor 11 and the second limit sensor 12 ( The total time for the telescopic end retraction action and the clamping part release action ( The total time for the telescopic end to extend and the clamping part to complete the clamping action. ( The downward movement speed of clamping mechanism 2 ( ), that is, the feeding speed of quartz glass tube 13 ( The acceleration time of drive component 9 is equal to the deceleration time. ( );

[0109] The total downward stroke of clamping mechanism 2 :

[0110] ( );

[0111] The total time from when one clamping mechanism 2 releases the quartz glass tube 13 and begins to move upwards to when the other clamping mechanism 2 moves downwards to the position of the second limit sensor 12. Recorded as:

[0112] ( );

[0113] The upward movement speed of clamping mechanism 2 :

[0114] ( );

[0115] Right now:

[0116] ( );

[0117] Therefore, when ( When the clamping mechanism 2 that can move downward reaches the second limit sensor 12, the clamping mechanism 2 that moves upward has already reached the first limit sensor 11.

[0118] Working principle: Two sets of linear modules 1 are symmetrically arranged on both sides of the quartz glass tube 13, each connected to a clamping mechanism 2. Before clamping, the two clamping mechanisms 2 are moved to the first limit sensor 11 and the second limit sensor 12, respectively. At the start of clamping, the clamping mechanism 2 located at the first limit sensor 11 moves rapidly downwards until it moves in the same direction and at the same speed as the quartz glass tube 13, clamping the tube. Simultaneously, the clamping mechanism 2 located at the second limit sensor 12 moves rapidly upwards at a speed greater than the unloading speed of the quartz glass tube 13, ensuring that the upward-moving clamping mechanism 2 reaches the first limit sensor 11 before the downward-moving clamping mechanism 2 reaches the second limit sensor 12. When the holding mechanism 2 reaches the second limit sensor 12, the clamping mechanism 2 located at the first limit sensor 11 accelerates downward until it moves in the same direction and at the same speed as the quartz glass tube 13 and clamps the quartz glass tube 13. After the control module detects that it is clamping the quartz glass tube 13, it causes the first set of clamping mechanisms 2 that clamped the quartz glass tube 13 to release the quartz glass tube 13, and then accelerates upward to the first limit sensor 11. When the clamping mechanism 2 that clamped the quartz glass tube 13 reaches the second limit sensor 12, the clamping mechanism 2 located at the first limit sensor 11 accelerates downward until it moves in the same direction and at the same speed as the quartz glass tube 13 and clamps the quartz glass tube 13. This cycle repeats to achieve the purpose of alternately clamping the quartz glass tube 13.

[0119] The linear motion of the linear module 1 parallel to the quartz glass tube 13 replaces the traditional roller-type rotational motion, avoiding the requirement for precise synchronous speed control between rollers; the telescopic component 5 and the clamping component 7 replace the roller extrusion clamping method, avoiding the difference in stretching parameters caused by the dimensional errors of the rollers and rubber bushings, reducing the radial offset of the quartz glass tube 13 caused by the dimensional errors of the rollers and rubber bushings, and preventing defects such as bending, ellipticity and wall deviation of the quartz glass tube 13 during the stretching process.

[0120] The above description is merely a preferred embodiment of the present invention and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention is not limited to the specific combination of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this invention.

Claims

1. A quartz glass tube stretching device, characterized in that, include: A linear module assembly, comprising two sets of linear modules (1) symmetrically arranged and extending along a first direction; a first limit sensor (11) and a second limit sensor (12) are provided on the linear module (1). The clamping assembly includes two clamping mechanisms (2) respectively connected to the two sets of linear modules (1). The clamping mechanism (2) has a clamping part for clamping the quartz glass tube (13). The clamping center of the clamping part is coplanar with the axis of the quartz glass tube (13). The clamping mechanism (2) includes: The first support frame (4) and the linear module (1) are connected by a transmission. Telescopic component (5), the telescopic component (5) is disposed on the first support frame (4), and has a telescopic end that reciprocates along a second direction; the second direction is perpendicular to the first direction; The second support frame (6) is disposed at the telescopic end; A clamping member (7) is disposed on the side wall of the second support frame (6), and the clamping member (7) has the clamping part; The clamping part includes two clamping fingers (8) that move relative to each other along a third direction. The two clamping fingers (8) are symmetrically arranged about the clamping center. When the quartz glass tube (13) is clamped by the clamping part, the two clamping fingers (8) move towards each other simultaneously. The third direction is perpendicular to the first direction and perpendicular to the second direction. The drive assembly includes two sets of drive mechanisms (3) respectively connected to the two sets of linear modules (1). The drive mechanisms (3) are used to drive the linear modules (1) to drive the clamping mechanism (2) to reciprocate along the first direction. The control module is electrically connected to the drive mechanism (3) and the clamping mechanism (2). The control module controls the clamping mechanism (2) located at the first limit sensor (11) to move down until it moves in the same direction and at the same speed as the quartz glass tube (13) and clamps the quartz glass tube (13). At the same time, the clamping mechanism (2) located at the second limit sensor (12) moves up until it reaches the first limit sensor (11). When the downward-moving clamping mechanism (2) reaches the second limit sensor (12), the clamping mechanism (2) located at the first limit sensor (11) moves down until it moves in the same direction and at the same speed as the quartz glass tube (13) and clamps the quartz glass tube (13).

2. The quartz glass tube stretching device according to claim 1, characterized in that, The drive mechanism (3) includes: A driving component (9) has a driving end, which is connected to the linear module (1) in a transmission manner; The controller (10) is electrically connected to the drive unit (9) and to the control module.

3. The quartz glass tube stretching device according to claim 2, characterized in that, The first limit sensor (11) is closer to the drive member (9) than the second limit sensor (12).

4. The quartz glass tube stretching device according to claim 3, characterized in that, The linear module (1) includes: A first mounting bracket extends along the first direction; both the first limit sensor (11) and the second limit sensor (12) are mounted on the first mounting bracket. A lead screw, which is rotatably disposed inside the first mounting bracket, and the lead screw is connected to the drive end in a transmission manner; The slider is threaded onto the lead screw, and the slider and the first mounting bracket are slidably adapted to each other. The first support bracket (4) is disposed on the slider.

5. The quartz glass tube stretching device according to claim 4, characterized in that, The linear module (1) includes: A second mounting bracket extends along the first direction; both the first limit sensor (11) and the second limit sensor (12) are mounted on the second mounting bracket. The drive wheel is rotatably disposed at one end of the second mounting bracket near the drive member (9) and is connected to the drive end in a transmission manner; Driven wheel, the driven wheel being rotatably disposed at one end of the second mounting bracket away from the drive member (9); The conveyor belt and the driving wheel are connected to the driven wheel, and the first support frame (4) is connected to the conveyor belt.

6. A clamping control method, implemented based on the quartz glass tube stretching device according to any one of claims 1-5, characterized in that, The clamping control method includes the following steps: S01. Before clamping, the control module controls the two sets of clamping mechanisms (2) to be located at the first limit sensor (11) and the second limit sensor (12) respectively. S02. After clamping begins, the control module controls the clamping mechanism (2) located at the first limit sensor (11) to move downward until it moves at the same speed as the quartz glass tube (13) and clamps the quartz glass tube (13). At the same time, the control module controls the clamping mechanism (2) located at the second limit sensor (12) to move upward until it reaches the first limit sensor (11). S03. The control module detects that the clamping mechanism (2) holding the quartz glass tube (13) reaches the second limit sensor (12), and controls the clamping mechanism (2) located at the first limit sensor (11) to move down until it moves at the same speed as the quartz glass tube (13) and clamps the quartz glass tube (13). S04. The control module controls the clamping mechanism (2) that reaches the second limit sensor (12) to release the clamp on the quartz glass tube (13) and controls it to move upward until it reaches the first limit sensor (11). S05. Repeat steps S03-S04 until the quartz glass tube (13) is produced.

7. The clamping control method according to claim 6, characterized in that, The upward movement speed of the clamping mechanism (2) is greater than the unloading speed of the quartz glass tube (13).

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