Quartz glass tube stretching device and clamping control method

Abstract

The invention discloses a quartz glass tube stretching device and a clamping control method, and relates to the technical field of quartz glass manufacturing, and the quartz glass tube stretching device comprises a linear module assembly which is provided with two groups of linear modules which are symmetrically arranged and extend along a first direction; the clamping assembly comprises clamping mechanisms which are in transmission connection with the two linear modules respectively, each clamping mechanism is provided with a clamping part for clamping the quartz glass tube, and the clamping center of each clamping part is coplanar with the axis of the quartz glass tube; the driving assembly is used for driving the two linear modules correspondingly, so that the two linear modules adjust the clamping mechanism to move correspondingly. 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 roller type rotary motion, the requirement for accurate synchronous speed control between rollers is avoided, the two 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] The present application relates to the technical field of quartz glass manufacturing, in particular to a quartz glass tube stretching device and clamping control method. BACKGROUND

[0002] The existing quartz glass tube stretching device is mainly composed of one or more pairs of rollers, and rubber bushings are usually installed on the rollers to play the role of heat insulation, increase friction and reduce damage to the quartz glass. The stretching mechanism is usually fixedly installed below the furnace discharge port, and the rollers are driven to rotate synchronously by the servo motor connected to the controller, thereby forming a quartz glass tube stretching device. When the quartz glass tube does not reach the corresponding roller position, the rollers are in a left-right separated state, and when the glass tube needs to be clamped and stretched, the left and right rollers are closed to the clamping center. The separation and closure are usually driven by a cylinder to drive the connecting rod to move the rollers.

[0003] When the roller type stretching device stretches the glass tube, the left and right rollers must simultaneously contact the glass tube and rotate synchronously. Due to the machining error of the rollers and the rubber bushings, or the difference in uniformity of the flexible material of the rubber bushings, the overall outer diameter of the rollers will produce an error when they contact the glass tube, resulting in a difference in the linear speed of the left and right rollers, and further causing the glass tube to deviate radially during stretching, resulting in defects such as bending of the glass tube. SUMMARY

[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 clamping control method.

[0005] In a first aspect, the present application provides a quartz glass tube stretching device, comprising: a linear module assembly, the linear module assembly comprising two groups of linear modules arranged symmetrically and extending along a first direction; a clamping assembly, the clamping assembly comprising two groups of clamping mechanisms respectively drivingly connected to the two groups of linear modules, the clamping mechanisms having clamping portions for clamping the quartz glass tube, the clamping centers of the clamping portions being coplanar with the axis of the quartz glass tube; a driving assembly, the driving assembly comprising two groups of driving mechanisms respectively drivingly connected to the two groups of linear modules, the driving mechanisms being used to drive the linear modules to reciprocally move the clamping mechanisms along the first direction; a control module, the control module being electrically connected with the driving mechanisms and the clamping mechanisms, and being used to control the two groups of clamping mechanisms to alternately clamp the quartz glass tube.

[0006] According to the technical scheme provided by the present application, the clamping mechanism comprises: a first support frame, the first support frame being drivingly connected with the linear module; A telescopic piece is arranged on the first support frame and has a telescopic end reciprocally moving along a second direction; the second direction is perpendicular to the first direction; A second support frame is arranged on the telescopic end; A clamping piece is arranged on the sidewall of the second support frame, and the clamping piece has the clamping part.

[0007] According to the technical scheme provided by the application, the clamping part comprises two clamping fingers relatively moving along a third direction; the third direction is perpendicular to the first direction and perpendicular to the second direction.

[0008] According to the technical scheme provided by the application, the driving mechanism comprises: A driving piece has a driving end, and the driving end is in transmission connection with the linear module; A controller is in electrical connection with the driving piece and the control module.

[0009] According to the technical scheme provided by the application, the linear module is provided with a first limit sensor and a second limit sensor, and the first limit sensor is closer to the driving piece than the second limit sensor.

[0010] According to the technical scheme provided by the application, the linear module comprises: A first mounting frame extends along the first direction; the first limit sensor and the second limit sensor are arranged on the first mounting frame; A lead screw is rotationally arranged in the first mounting frame, and the lead screw is in transmission connection with the driving end; A sliding block is threadedly sleeved on the lead screw, and the sliding block is in sliding adaptation with the first mounting frame, and the first support frame is arranged on the sliding block.

[0011] According to the technical scheme provided by the application, the linear module comprises: A second mounting frame extends along the first direction; the first limit sensor and the second limit sensor are arranged on the second mounting frame; A driving wheel is rotationally arranged at one end of the second mounting frame close to the driving piece, and in transmission connection with the driving end; A driven wheel is rotationally arranged at one end of the second mounting frame away from the driving piece; A transmission belt is in transmission connection with the driving wheel and the driven wheel, and the first support frame is connected to the transmission belt.

[0012] In a second aspect, the present application provides a clamping control method, which is implemented based on the quartz glass tube drawing device, and comprises the following steps: S01, before clamping, the control module controls two groups of clamping mechanisms to be located at the first limit sensor and the second limit sensor respectively; S02, after the clamping starts, 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 makes the clamping mechanism clamp the quartz glass tube, while controlling the clamping mechanism located at the second limit sensor to move upward until it reaches the first limit sensor; S03, the control module detects that the clamping mechanism clamping the quartz glass tube reaches the second limit sensor, 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 clamps the quartz glass tube; S04, the control module controls the clamping mechanism reaching the second limit sensor to release the clamping of the quartz glass tube, and controls it to move upward until it reaches the first limit sensor; S05, repeating steps S03-S04 until the production of the quartz glass tube is completed.

[0013] According to the technical scheme provided by the present application, the upward moving speed of the clamping mechanism is greater than the feeding speed of the quartz glass tube.

[0014] In summary, the present application specifically discloses a quartz glass tube drawing device, which comprises a linear module assembly having two groups of linear modules symmetrically arranged and extending along a first direction; a clamping assembly comprising clamping mechanisms respectively drivingly connected to the two groups of linear modules, the clamping mechanisms having clamping portions clamping the quartz glass tube, and the clamping centers of the clamping portions being coplanar with the axis of the quartz glass tube; a driving assembly for driving the two groups of linear modules respectively to move the clamping mechanisms; and a control module electrically connected with the driving mechanism and the clamping mechanisms for controlling the two groups of clamping mechanisms to alternately clamp the quartz glass tube. The linear motion of the linear module assembly replaces the traditional rotary motion of the roller, avoiding the requirement of precise synchronous speed control between the rollers; the clamping mechanism replaces the roller extrusion type clamping method, avoiding the stretching parameter difference caused by the size error of the rollers and rubber bushings; and the two groups of clamping mechanisms alternately act on the quartz glass tube, which can avoid the radial deviation of the quartz glass tube caused by the size error of the rollers and rubber bushings, and avoid the generation of defects such as bending, ovality and wall deviation of the quartz glass tube in the drawing process. BRIEF DESCRIPTION OF DRAWINGS

[0015] Other features, objects, and advantages of the application will become more apparent by reference to the following detailed description of non-limiting embodiments thereof in conjunction with the accompanying drawings in which: Figure 1 It is a front view of a quartz glass tube stretching device.

[0016] Figure 2 It is a schematic diagram of the overall structure of a quartz glass tube stretching device.

[0017] Figure 3 It is a schematic diagram of a clamping mechanism.

[0018] Figure 4 It is a flowchart of a clamping control method.

[0019] Reference signs in the drawings: 1, linear module; 2, clamping mechanism; 3, driving mechanism; 4, first support frame; 5, telescopic piece; 6, second support frame; 7, clamping piece; 8, clamping finger; 9, driving piece; 10, controller; 11, first limit sensor; 12, second limit sensor; 13, quartz glass tube. DETAILED DESCRIPTION

[0020] The application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related application, and are not a limitation on the application. In addition, it needs to be explained that only the parts related to the application are shown in the drawings for the convenience of description.

[0021] It needs to be explained that the embodiments in the application and the features in the embodiments can be combined with each other without conflict. The application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0022] Embodiment one The existing quartz glass tube stretching device is mainly composed of one or more pairs of rollers, and rubber bushings are usually installed on the rollers to play the role of heat insulation, increase friction, and reduce damage to the quartz glass. Or install a synchronous belt on the multiple pairs of rollers to form a caterpillar type stretching mechanism. The rollers are driven to rotate synchronously by the servo motor connected to the controller. When the quartz glass tube does not reach the corresponding roller position, the rollers are in a left and right separated state. When the quartz glass tube needs to be clamped and stretched, the left and right rollers close to the clamping center. When the quartz glass tube is stretched, the left and right rollers must simultaneously contact the quartz glass tube and rotate synchronously. Due to the machining error of the rollers and the rubber bushings, or the difference in uniformity of the flexible material of the rubber bushings, the overall outer diameter of the rollers will produce an error when they contact the quartz glass tube, resulting in a difference in the linear speed of the left and right rollers, and further causing the quartz glass tube to produce radial deviation when stretched, causing the quartz glass tube to bend and other defects.

[0023] To solve the above defects, please refer toFigures 1 to 3 The application provides a quartz glass tube stretching device, which comprises the following components. A linear module assembly comprises two groups of linear modules 1 arranged symmetrically and extending along a first direction. Figure 1 The first direction is a vertical direction. A clamping assembly comprises two groups of clamping mechanisms 2 respectively connected to the two groups of linear modules 1, and the clamping mechanisms 2 have clamping portions for clamping the quartz glass tube 13. A driving assembly comprises two groups of driving mechanisms 3 respectively connected to the two groups of linear modules 1, and the driving mechanisms 3 are used for driving the linear modules 1 to drive the clamping mechanisms 2 to move back and forth along the first direction. A control module is electrically connected to the driving mechanisms 3 and the clamping mechanisms 2 and is used for controlling the two groups of clamping mechanisms 2 to clamp the quartz glass tube 13 alternately.

[0024] Specifically, the linear modules 1 extending along the first direction have the same extending direction as the quartz glass tube 13, the two groups of linear modules 1 are arranged symmetrically on the two sides of the quartz glass tube 13, and the two groups of linear modules 1 are respectively connected to the clamping mechanisms 2, so that the clamping mechanisms 2 move back and forth on the linear modules 1 along the first direction and clamp the quartz glass tube 13. The driving assembly comprises two groups of driving mechanisms 3 respectively connected to the two groups of linear modules 1, the two groups of linear modules 1 are respectively driven by the two groups of driving mechanisms 3, and the movement of the two groups of clamping mechanisms 2 is realized. The control module is electrically connected to the driving mechanisms 3 and the clamping mechanisms 2, the control module controls the driving mechanisms 3 and the clamping mechanisms 2, and the two groups of clamping mechanisms 2 clamp the quartz glass tube 13 alternately. Specifically, after the control module controls one group of clamping mechanisms 2 to clamp the quartz glass tube 13, the control module controls the other group of clamping mechanisms 2 to move until the other group of clamping mechanisms 2 clamps the quartz glass tube 13, and then the control module controls the first group of clamping mechanisms 2 to release the quartz glass tube 13. The clamping center of the clamping portion and the axis of the quartz glass tube 13 are coplanar, the clamping portion does not contact the quartz glass tube 13 out of synchronization during the clamping process, the linear motion of the linear modules 1 replaces the traditional rotary motion of the rollers, the accurate synchronous speed control requirement between the rollers is avoided, the radial deviation of the quartz glass tube 13 caused by the size error of the rollers and the rubber bushing is avoided, and the precision of the quartz glass tube 13 in the stretching process is improved.

[0025] Further, the clamping mechanism 2 comprises the following components. A first support frame 4 is connected to the linear module 1. The telescopic part 5 is arranged on the first supporting frame 4 and has a telescopic end reciprocally moving along a second direction; the second direction is perpendicular to the first direction; The second supporting frame 6 is arranged on the telescopic end; The clamping part 7 is arranged on the side wall of the second supporting frame 6 and has a clamping portion.

[0026] Specifically, the first supporting frame 4 is drivingly connected to the linear module 1, and the linear module 1 can drive the first supporting frame 4 to reciprocally move along the first direction; the telescopic part 5 is arranged on the first supporting frame 4 and can reciprocally move along the first direction with the first supporting frame 4, and the telescopic part 5 has a telescopic end reciprocally moving along a second direction; the second direction is perpendicular to the first direction, and the second direction is Figure 1 the vertical direction perpendicular to the paper surface; the second supporting frame 6 is arranged on the telescopic end, so that the telescopic end can drive the second supporting frame 6 to reciprocally move along the second direction; the clamping part 7 is arranged on the side wall of the second supporting frame 6, so that the clamping part 7 can reciprocally move along the second direction with the second supporting frame 6, and the clamping part 7 has a clamping portion clamping the quartz glass tube 13.

[0027] Therefore, when the quartz glass tube 13 needs to be clamped, the linear module 1 is operated to drive the first supporting frame 4 to move along the first direction, thereby driving the telescopic part 5 to move along the first direction, the telescopic end drives the second supporting frame 6 to move along the second direction, thereby driving the clamping part 7 to move along the second direction and approach the quartz glass tube 13, so as to clamp the quartz glass tube 13, and the stability is high.

[0028] The telescopic part 5 can be a telescopic cylinder; and the clamping part 7 can be a clamping cylinder.

[0029] Further, the clamping portion includes two clamping fingers 8 relatively moving 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 a horizontal direction.

[0030] Specifically, the two clamping fingers 8 of the clamping part 7 are distributed along the third direction and symmetrically arranged about a clamping center, so that when the quartz glass tube 13 is clamped by the clamping portion, the two clamping fingers 8 simultaneously move towards each other, which ensures that the two clamping fingers 8 can simultaneously contact the quartz glass tube 13, avoids the influence of the difference in contact time, and improves the precision of the quartz glass tube 13.

[0031] It should be noted that the telescopic part 5 is provided with a first travel switch, and the first travel switch is provided with a first position; when the quartz glass tube 13 needs to be clamped, the control module controls the telescopic end to extend and drive the clamping part 7 to move, and the telescopic end stops moving when the telescopic end reaches the first position; at this time, the clamping center of the clamping portion and the axis of the quartz glass tube 13 are coplanar; The first stroke switch is further provided with a second position, when the clamping of the quartz glass tube 13 needs to be released, the control module controls the retracting of the telescopic end, and the telescopic end stops moving when reaching the second position, at this time, the clamping part is away from the quartz glass tube 13.

[0032] The second stroke switch is provided on the clamping part 7, and the second stroke switch is provided with a third position, when the quartz glass tube 13 needs to be clamped, the control module controls the two clamping fingers 8 to move close to each other, and the two clamping fingers 8 stop moving when reaching the third position, at this time, the two clamping fingers 8 clamp the quartz glass tube 13 together. The second stroke switch is further provided with a fourth position, when the clamping of the quartz glass tube 13 needs to be released, the control module controls the two clamping fingers 8 to move away from each other, so that the clamping fingers 8 are away from the quartz glass tube 13, and the two clamping fingers 8 stop moving when reaching the fourth position.

[0033] In some embodiments, the positions of the telescopic end and the clamping fingers 8 are determined by using a delay signal, for example: When the quartz glass tube 13 needs to be clamped, the control module controls the telescopic end to extend, and the telescopic end stops moving after extending for 1 second, then the control module controls the two clamping fingers 8 to move close to each other, and the two clamping fingers 8 stop moving after moving for 1 second, at this time, the clamping of the quartz glass tube 13 is completed. When the clamping of the quartz glass tube 13 needs to be released, the control module controls the two clamping fingers 8 to move away from each other, and the two clamping fingers 8 stop moving after moving for 1 second, then the control module controls the telescopic end to retract, and the telescopic end stops moving after moving for 1 second, at this time, the clamping of the quartz glass tube 13 is released.

[0034] Further, the driving mechanism 3 comprises: The driving part 9 has a driving end, and the driving end is in transmission connection with the linear module 1; the driving part 9 can be a servo motor; The controller 10 is in electrical connection with the driving part 9, and in electrical connection with the control module.

[0035] Specifically, the controller 10 is in electrical connection with the driving part 9, can detect the rotating speed of the driving end in real time, and calculate the moving speed of the clamping mechanism 2 according to the rotating speed, and the controller 10 is in electrical connection with the control module, and the control module can send instructions to adjust the rotating direction and the rotating speed of the driving end, so as to adjust the moving direction and the moving speed of the clamping mechanism 2.

[0036] Further, the linear module 1 is provided with a first limit sensor 11 and a second limit sensor 12, and the first limit sensor 11 is closer to the driving part 9 than the second limit sensor 12.

[0037] Specifically, the first limiting sensor 11 and the second limiting sensor 12 are arranged on the two sets of linear modules 1, and the first limiting sensor 11 and the second limiting sensor 12 of the two sets of linear modules 1 are located on the sides away from each other of the two sets of linear modules 1; the first limiting sensor 11 and the second limiting sensor 12 are electrically connected with the control module, and are used for detecting the position of the clamping mechanism 2.

[0038] Further, the linear module 1 comprises: The first mounting frame extends along the first direction; the first limiting sensor 11 and the second limiting sensor 12 are arranged on the first mounting frame; The lead screw is rotationally arranged inside the first mounting frame, and the lead screw is in transmission connection with the driving end; The sliding block is threadedly sleeved on the lead screw, and the sliding block is in sliding fit with the first mounting frame, and the first supporting frame 4 is arranged on the sliding block.

[0039] Specifically, the lead screw is in transmission connection with the driving end by adopting a worm gear structure, for example, and the lead screw is driven to rotate by the rotation of the driving end, and the first mounting frame limits the sliding block, so that the sliding block can move back and forth along the first mounting frame, thereby driving the movement of the clamping mechanism 2.

[0040] Further, in some embodiments, the linear module 1 comprises: The second mounting frame extends along the first direction; the first limiting sensor 11 and the second limiting sensor 12 are arranged on the second mounting frame; The driving wheel is rotationally arranged at one end of the second mounting frame close to the driving member 9, and is in transmission connection with the driving end; The driven wheel is rotationally arranged at one end of the second mounting frame away from the driving member 9; The transmission belt is in transmission connection with the driving wheel and the driven wheel, and the first supporting frame 4 is connected to the transmission belt.

[0041] Specifically, the driving wheel is in transmission connection with the driving end, and the driving wheel is driven to rotate by the rotation of the driving end, so that the driven wheel is driven to rotate by the action of the transmission belt, thereby driving the movement of the clamping mechanism 2.

[0042] The related structure of the driving end and the linear module 1 in transmission connection can refer to the prior art, including but not limited to structures such as couplings and speed reducers that can stably transmit power, and is not limited here.

[0043] Embodiment two The embodiment provides a clamping control method based on the quartz glass tube stretching device provided in embodiment one, as shown in the figure, which comprises the following steps: Figure 4 ​S01、Before clamping, the control module controls two sets of clamping mechanisms 2 to be located at the first limit sensor 11 and the second limit sensor 12 respectively.

[0044] Before clamping starts, the staff starts the stretching device, and the control module controls two sets of driving mechanisms 3 to make two sets of linear modules 1 drive 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.

[0045] S02、After clamping starts, the control module 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 makes the clamping mechanism 2 clamp the quartz glass tube 13, while controlling the clamping mechanism 2 located at the second limit sensor 12 to move up until it reaches the first limit sensor 11.

[0046] When clamping starts, the control module controls the left clamping mechanism 2 located at the first limit sensor 11 to accelerate downward movement, specifically: the control module controls the driving part 9 of the left driving mechanism 3 to operate, so that the driving end rotates to drive the left linear module 1 to move the left clamping mechanism 2; until the left clamping mechanism 2 moves downward at the same speed as the feeding speed of the quartz glass tube 13, and then the control module controls the extension end of the left telescopic part 5 to extend, and stops when the extension end reaches the first position, and then the control module controls the two clamping fingers 8 of the left clamping part 7 to approach each other until the two clamping fingers 8 reach the third position, at this time the left clamping mechanism 2 clamps the quartz glass tube 13 while moving at the same speed and in the same direction as the quartz glass tube 13; At the same time, the control module controls the right clamping mechanism 2 located at the second limit sensor 12 to accelerate upward movement until the right clamping mechanism 2 reaches the first limit sensor 11, and 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 right clamping mechanism 2 can reach the first limit sensor 11 before the left clamping mechanism 2 reaches the second limit sensor 12.

[0047] S03、The control module detects that the clamping mechanism 2 clamping 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; When the second limit sensor 12 on the left side detects the clamping mechanism 2 on the left side, a signal is sent to the control module, which controls the clamping mechanism 2 on the right side to accelerate downward until the speed of the clamping mechanism 2 on the right side is the same as the feeding speed of the quartz glass tube 13, and then the control module controls the extension of the telescopic part 5 on the right side to stop when the extension reaches the first position, and then the control module controls the two clamping fingers 8 of the clamping part 7 on the right side to move closer to each other until the two clamping fingers 8 reach the third position, at which time the clamping mechanism 2 on the right side moves at the same speed and in the same direction as the quartz glass tube 13 while clamping the quartz glass tube 13.

[0048] S04, the control module controls the clamping mechanism 2 that reaches the second limit sensor 12 to release the clamping of the quartz glass tube 13 and controls it to move upward until it reaches the first limit sensor 11.

[0049] When the two clamping fingers 8 of the clamping part 7 on the right side move to the third position, a signal is sent to the control module to make the control module control the clamping part 7 on the right side to stop, and at the same time the control module controls the two clamping fingers 8 of the clamping part 7 on the left side to move away from each other to release the quartz glass tube 13, and when the two clamping fingers 8 of the clamping part 7 on the left side reach the fourth position, the control module controls the telescopic part 5 on the left side to retract its extension to the second position, and at the same time the control module controls the drive part 9 on the left side to decelerate, stop, and then reverse to drive the clamping mechanism 2 on the left side to move upward quickly until it reaches the first limit sensor 11 on the left side.

[0050] S05, repeat steps S03-S04 until the production of the quartz glass tube 13 is completed.

[0051] When the second limit sensor 12 on the right side detects the clamping mechanism 2 on the right side, a signal is sent to the control module, which controls the drive mechanism 3 on the left side to drive the linear module 1 on the left side to accelerate downward with the clamping mechanism 2 on the left side until it moves at the same speed and in the same direction as the quartz glass tube 13 and clamps the quartz glass tube 13; When the control module detects that the clamping mechanism 2 on the left side has completed the clamping of the quartz glass tube 13, it controls the clamping part 7 on the right side to release the quartz glass tube 13, and then controls the drive part 9 on the right side to decelerate, stop, and then reverse until the first limit sensor 11 on the right side detects the clamping mechanism 2 on the right side; Thus, the continuous clamping and stretching operation of the quartz glass tube 13 is realized.

[0052] It should be noted that the upward speed of the clamping mechanism 2 needs to be greater than the feeding speed of the quartz glass tube 13, so that the clamping mechanism 2 that clamps the quartz glass tube 13 can reach the second limit sensor 12 before the clamping mechanism 2 on the other side reaches the first limit sensor 11.

[0053] Meanwhile, the acceleration and deceleration of the driving member 9 need 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.

[0054] The distance between the first limit sensor 11 and the second limit sensor 12 is set as ( ), the total time of the retracting action of the telescopic end and the releasing action of the clamping part ( ), the total time of the extending action of the telescopic end and the clamping action of the clamping part ( ), the descending speed of the clamping mechanism 2 ( ), the feeding speed of the quartz glass tube 13 ( ), the acceleration time of the driving member 9 is equal to the deceleration time ( ); The total stroke of the clamping mechanism 2 in the descending direction is : ( ); The total time of the releasing action of the clamping mechanism 2 on one side and the descending action of the clamping mechanism 2 on the other side to the position of the second limit sensor 12 is recorded as ( ); The ascending speed of the clamping mechanism 2 : ( ); That is ( ); Therefore, when ( ) is satisfied, the clamping mechanism 2 in the descending direction reaches the second limit sensor 12 before the clamping mechanism 2 in the ascending direction reaches the first limit sensor 11.

[0055] ​Working principle: two groups of linear modules 1 symmetrically arranged on both sides of the quartz glass tube 13 are respectively connected with clamping mechanisms 2, before clamping, the two groups of clamping mechanisms 2 are respectively moved to the first limit sensor 11 and the second limit sensor 12, when starting clamping, the clamping mechanism 2 located at the first limit sensor 11 is quickly moved downward until the same direction and 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 is quickly moved upward, the upward speed is greater than the downward speed of the quartz glass tube 13, which can ensure that the upward clamping mechanism 2 has reached the first limit sensor 11 before the downward clamping mechanism 2 reaches the second limit sensor 12; when the downward clamping mechanism 2 reaches the second limit sensor 12, the clamping mechanism 2 located at the first limit sensor 11 is accelerated downward until the same direction and speed as the quartz glass tube 13, and clamps the quartz glass tube 13, after the control module detects that the clamping mechanism 2 clamps the quartz glass tube 13, the clamping mechanism 2 clamping the quartz glass tube 13 is loosened, and then the clamping mechanism 2 is accelerated to move upward to the first limit sensor 11, when the clamping mechanism 2 clamping the quartz glass tube 13 reaches the second limit sensor 12, the clamping mechanism 2 located at the first limit sensor 11 is accelerated downward until the same direction and speed as the quartz glass tube 13, and clamps the quartz glass tube 13, thus the cycle is repeated to achieve the purpose of alternating clamping the quartz glass tube 13; The linear motion of the linear module 1 parallel to the quartz glass tube 13 replaces the traditional rotating motion of the roller, avoiding the requirement of precise synchronous speed control between the rollers; the telescopic part 5 and the clamping part 7 replace the roller extrusion type clamping method, avoiding the stretching parameter difference caused by the size error of the rollers and rubber bushings, which can reduce the radial deviation of the quartz glass tube 13 caused by the size error of the rollers and rubber bushings, avoiding the bending, oval and offset wall defects of the quartz glass tube 13 in the stretching process.

[0056] The above description is only the preferred embodiment of the application and the explanation of the applied technical principles. Those skilled in the art should understand that the application range involved in the application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or equivalent features without departing from the application concept. For example, the above features are replaced with the technical features disclosed in the application (but not limited to) having similar functions to form a technical solution.

Claims

1. A quartz glass tube drawing apparatus characterized by comprising: The application relates to a linear module assembly and a clamping assembly. The linear module assembly comprises two groups of linear modules (1) arranged symmetrically and extending along a first direction. The clamping assembly comprises two groups of clamping mechanisms (2) respectively connected to the two groups of linear modules (1), and the clamping mechanisms (2) have clamping portions for clamping the quartz glass tube (13), and the clamping centers of the clamping portions are coplanar with the axis of the quartz glass tube (13). The driving assembly comprises two groups of driving mechanisms (3) respectively connected to the two groups of linear modules (1), and the driving mechanisms (3) are used for driving the linear modules (1) to drive the clamping mechanisms (2) to reciprocate along the first direction. The control module is electrically connected with the driving mechanisms (3) and the clamping mechanisms (2) and is used for controlling the two groups of clamping mechanisms (2) to alternately clamp the quartz glass tube (13).

2. A quartz glass tube drawing apparatus according to claim 1, wherein The clamping mechanism (2) comprises a first support frame (4) connected with the linear module (1), a telescopic part (5) arranged on the first support frame (4) and having a telescopic end reciprocating along a second direction, the second direction being perpendicular to the first direction, a second support frame (6) arranged on the telescopic end, and a clamping part (7) arranged on the side wall of the second support frame (6) and having the clamping portion. The clamping portion comprises two clamping fingers (8) reciprocating along a third direction, the third direction being perpendicular to the first direction and perpendicular to the second direction. The driving mechanism (3) comprises a driving part (9) having a driving end connected with the linear module (1), and a controller (10) electrically connected with the driving part (9) and the control module. The linear module (1) is provided with a first limit sensor (11) and a second limit sensor (12), and the first limit sensor (11) is closer to the driving part (9) than the second limit sensor (12). The linear module (1) comprises a first mounting frame extending along the first direction, the first limit sensor (11) and the second limit sensor (12) being arranged on the first mounting frame, a lead screw rotatably arranged in the first mounting frame and connected with the driving end, and a sliding block threadedly sleeved on the lead screw and slidingly matched with the first mounting frame, and the first support frame (4) is arranged on the sliding block.

3. A quartz glass tube drawing apparatus according to claim 2, wherein The linear module (1) comprises a second mounting frame extending along the first direction, the first limit sensor (11) and the second limit sensor (12) being arranged on the second mounting frame, a driving wheel rotatably arranged at one end of the second mounting frame close to the driving part (9) and connected with the driving end.

4. A quartz glass tube drawing apparatus according to claim 3, wherein ​ ​ ​ 5. A quartz glass tube drawing apparatus according to claim 4, wherein ​ 6. A quartz glass tube drawing apparatus according to claim 5, wherein ​ ​ ​ ​ 7. A quartz glass tube drawing apparatus according to claim 5, wherein ​ ​ ​ A driven wheel, which is rotationally arranged at one end of the second mounting frame away from the driving member (9); A conveyor belt, which is in driving connection with the driving wheel and the driven wheel, and the first support frame (4) is connected to the conveyor belt.

8. A clamping control method realized based on the quartz glass tube stretching apparatus according to any one of claims 1 to 7, characterized by, The clamping control method comprises the following steps: S01, before clamping, the control module controls two groups of clamping mechanisms (2) to be respectively located at the first limit sensor (11) and the second limit sensor (12); S02, after clamping starts, 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 makes the clamping mechanism (2) clamp the quartz glass tube (13), while controlling 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) clamping the quartz glass tube (13) reaches the second limit sensor (12), 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); S04, the control module controls the clamping mechanism (2) reaching the second limit sensor (12) to release the clamping of 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 production of the quartz glass tube (13) is completed.

9. A chucking control method according to claim 8, wherein The upward moving speed of the clamping mechanism (2) is greater than the downward moving speed of the quartz glass tube (13).

Images