Device and method for correcting abrasion of substrate glass clamping roller

Abstract

The invention discloses a device and a method for correcting abrasion of substrate glass clamping rollers, and belongs to the field of liquid crystal glass substrate production and forming processes. The device comprises clamping roller sets which are located in an annealing furnace and are arranged in a multi-layer height mode and arranged in a bilateral symmetry mode, and each clamping roller set is composed of two clamping rollers; a glass tape is pulled downwards between the two clamping rollers in the same clamping roller set, the glass tape divides the clamping rollers on the two sides into a fixed side clamping roller and a floating side clamping roller, a coloring agent is mixed in the inner tissue of a roller coating material of the clamping rollers, and when the clamping rollers pull the glass tape downwards, the coloring agent is separated from the fixed side clamping roller and the floating side clamping roller. The clamping rollers filled with coloring agents can generate indentations on the glass tape, and each clamping roller is provided with an external power source and a first servo motor connected with the clamping roller. According to the invention, the change of the diameter of the clamping roller can be monitored in real time so as to correct the speed of the motor, the clamping roller is controlled to operate more finely, and the product quality and yield are improved.

Description

Technical Field

[0001] The invention relates to the field of liquid crystal glass substrate production and molding technology, and in particular to a correction device and method for the wear of a substrate glass clamping roller. Background Art

[0002] At present, domestic liquid crystal glass substrates are mainly produced by the overflow down-pull method, in which the clamping roller bosses used in pairs in the multi-roller clamping technology contact and clamp the glass ribbon, and the driving unit drives the two rollers to rotate towards each other. The two clamping rollers rotating towards each other rely on friction to exert a certain traction external force on the glass ribbon, so that the glass plate reaches a predetermined thickness.

[0003] In actual production, the material of the clamping roller boss is a mixture of asbestos and refractory materials that is pressed and sintered. During use, the boss will produce certain wear and tear. The degree of wear is determined by some physical factors such as the length of use, clamping force, and high temperature environment. In addition, since each clamping roller is individually driven by a drive unit with a servo motor as the drive source, the process personnel will calculate the boss surface linear velocity through the angular velocity and boss radius provided by the drive unit when actually controlling the traction effect of the clamping roller on the glass ribbon, although the original intention of the production process is to control the traction effect of the clamping roller on the glass ribbon through the boss surface linear velocity.

[0004] However, the continuous rotation of the clamping roller in the glass melting furnace will cause wear and tear, resulting in the diameter of the clamping roller changing and decreasing. The actual diameter of the clamping roller cannot be measured in the furnace, resulting in the actual glass traction speed being less than the given traction speed when the actual controlled motor speed remains unchanged after the short roller is worn.

[0005] The traditional method is to cut a piece of glass plate that flows down in a unit of time, measure the length of the glass plate, and correct the diameter parameters according to the change in the length of the plate. However, since the actual value of the roller cannot be known, the correction is inaccurate, resulting in a lag in the adjustment of process parameters. Process personnel are unable to compensate for the relevant process parameters in time, which in turn affects the process quality and yield.

[0006] Therefore, in order to enable the process parameters to be adjusted in time according to the on-site production material status, it is necessary for the technical personnel in this field to provide a correction device and method for the wear of the substrate glass clamping roller. Summary of the invention

[0007] The purpose of the present invention is to provide a device and method for correcting the wear of a substrate glass clamping roller, which effectively solves the problem that the existing clamping roller is gradually worn during the pull-down process of the liquid crystal glass, and personnel can only correct the diameter of the clamping roller based on experience, resulting in delayed adjustment of process parameters and affecting process quality and yield.

[0008] The technical solution of the present invention is as follows:

[0009] A device and method for correcting the wear of a substrate glass clamping roller, comprising a clamping roller group located at multiple levels inside an annealing furnace and symmetrically arranged on the left and right sides, wherein one clamping roller group is composed of two clamping rollers, and a glass ribbon is pulled downward between the two clamping rollers in the same clamping roller group, and the roller coating material of the clamping roller has a dye mixed inside the internal structure. When the clamping roller pulls the glass ribbon downward, the clamping roller filled with the dye will produce an indentation on the glass ribbon, and an image measuring instrument for photographing the indentation produced by the clamping roller on the glass ribbon is provided below the clamping roller group at the bottom layer, and an anti-deflection correction component is provided on one side of the glass ribbon, and the anti-deflection correction component drives the clamping roller to achieve displacement.

[0010] Preferably, an overflow brick installed on the top of the annealing furnace is provided above the topmost clamping roller group, and the molten glass flows out of the overflow brick and flows downward to form a glass ribbon.

[0011] Preferably, the glass ribbon divides the clamping rollers on both sides into fixed side clamping rollers and floating side clamping rollers, the anti-deflection correction assembly is connected to the bottom of the fixed side clamping roller, and each of the clamping rollers is provided with a servo motor connected to an external power supply.

[0012] Preferably, the number of layers of the clamping roller groups is not less than two, and in an initial state, the gaps between each of the clamping roller groups are consistent and in the same vertical direction.

[0013] Preferably, the working surface width of the clamping roller of the upper layer is smaller than the working surface width of the clamping roller of the lower layer, and the inside of the clamping roller of each layer has inconsistent dyes.

[0014] Preferably, the image measuring instrument is installed at the exit of the road-fire furnace, the number of the image measuring instruments is two on one side of the glass ribbon, and the image measuring instruments are located directly below the working surface of the clamping roller.

[0015] Preferably, a sliding plate is provided at the bottom of the servo motor, and sliding blocks are symmetrically provided at the bottom of the sliding plate, the vertical cross-section of the sliding block is concave downward, and a mounting plate is provided below the sliding plate.

[0016] Preferably, the mounting plate is mounted on the outside of the annealing furnace by means of a frame, and guide plates are symmetrically arranged on the top of the mounting plate, and the slider is slidably connected to the guide plates.

[0017] Preferably, the anti-skew correction component includes a positioning plate, a second servo motor, a ball screw and a movable plate, the positioning plate is connected to the side wall of the mounting plate and on the side close to the fixed side clamping roller, the vertical section of the positioning plate is L-shaped, the second servo motor is connected to the positioning plate, the second servo motor is connected to the ball screw through a coupling, the ball screw extends to the bottom of the sliding plate on the fixed side clamping roller, the movable plate is fixedly connected to the bottom of the sliding plate on the fixed side clamping roller, and the ball screw passes through the movable plate and is rotatably connected to it.

[0018] A method for correcting the wear of a substrate glass clamping roller comprises the following specific steps:

[0019] S1: First, adjust the gap size of each group of clamping rollers to keep them consistent in the initial state. After the glass liquid enters the overflow brick, it flows down from the overflow brick. The clamping roller on the fixed side is limited by the anti-deviation correction component. The clamping roller on this side does not move left and right with the glass ribbon during operation. The floating side clamping roller on the other side moves slightly left and right along the slider. When the diameter of the fixed side clamping roller is worn, the glass ribbon pulled down through the center of the overflow brick deviates to the side of the fixed clamping roller, thereby deviating from the original geometric position center of the equipment.

[0020] S2: After the diameter of the clamping roller on the fixed side becomes smaller, the clamping roller on the floating side will press the glass to deviate from the geometric center of the original flow direction. After adjusting the speed of servo motor 1, start servo motor 2. Servo motor 2 will drive the ball screw to rotate, so that the moving plate moves. The moving plate and the sliding plate cooperate with each other, so that the clamping roller on the fixed side moves toward the direction of the glass ribbon, so that the glass liquid always remains in the center position between the two clamping rollers.

[0021] S3: In the initial state, the working surface width of the clamping roller is measured as D, and the initial diameter is R. The working surface of the clamping roller is photographed by the image measuring instrument, and the actual working surface width of the clamping roller after wear during work is accurately measured as d, which is equivalent to the indentation length of the clamping roller on the glass ribbon. We use the following calculation formula to obtain the instantaneous diameter R1 of the clamping roller at this time:

[0022]

[0023] After calculating the value of R1, the formula for the glass pull-down speed is:

[0024]

[0025] The traction speed is the process given input value, and its value is the reference constant. The speed of the servo motor 1 is adjusted in time according to the real-time width of the clamping roller, so that although the clamping rollers on both sides of the glass ribbon maintain different speeds, the glass ribbon can also be pulled at a uniform speed.

[0026] The advantages of the present invention are:

[0027] 1. The present invention overturns the traditional way of adjusting the pulling down of the glass ribbon. The traditional process basically involves cutting a piece of glass sheet flowing down in a unit time, measuring the length of the glass sheet, and correcting the diameter parameter according to the change of the sheet length;

[0028] The present invention is completely different: different from the traditional approach, the present invention adopts reverse thinking. By adding a dye to the inside of the clamping roller, the dye will form an indentation on the pulled-down glass plate. After wear, the indentation decreases. The servo motor speed that needs to be adjusted is reversely deduced through the reduction of the indentation, thereby changing the glass pulling speed. The clamping roller diameter change can be monitored in real time and the motor speed can be corrected so that the process parameters can be adjusted immediately according to the on-site production material status, so that the glass pulling speed can still be kept consistent after the clamping roller diameter changes, and the operation of the clamping roller can be finely controlled to improve the product yield.

[0029] 2. The present invention installs a servo motor 2 on the fixed side of the clamping roller. The servo motor 2 drives the ball screw to rotate. When the wear amount of the clamping roller is known, the servo motor 2 can drive the ball screw to move the fixed side clamping roller to the middle position, so that the glass ribbon contacted by the clamping roller is always in the center line position of the equipment, and the glass ribbon pulled down through the center of the overflow brick is always in the center line position of the equipment, and the pull-down position will not be offset.

[0030] 3. When it is necessary to finely control the speed of multiple layers of clamping rollers at the same time, since the width of the working surface of the clamping rollers decreases layer by layer from top to bottom, and different dyes are added to dye the clamping rollers during the coating of the clamping rollers, each layer of the clamping rollers will leave a corresponding color band after clamping the glass ribbon, and the lower layer of the clamping rollers will not completely cover the upper layer of the clamping rollers. This makes it convenient for the subsequent image measuring instrument to distinguish and measure the corresponding imprint width value, and clearly know the consumption of each layer of the clamping rollers.

[0031] 4. The present invention can be connected to the on-site production servo motor control system through the control process, and can automatically complete the position and diameter correction of the clamping roller according to the signal fed back by the image measuring instrument in real time, thereby improving the automation degree of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the clamping roller and glass ribbon and other components of the present invention;

[0033] Figure 2 It is an enlarged view of the partial structure of the clamping roller mechanism of the present invention;

[0034] Figure 3 It is a schematic diagram of the structure of the working surface width relationship of the clamping roller of the present invention;

[0035] Figure 4 It is a flow chart of the method of using the clamping roller correction device of the present invention.

[0036] Figure numerals: 1. clamping roller; 2. glass ribbon; 3. image measuring instrument; 4. overflow brick; 1-1. fixed side clamping roller; 1-2. floating side clamping roller; 5. servo motor one; 6. sliding plate; 7. slider; 8. mounting plate; 9. guide plate; 10. positioning plate; 11. servo motor two; 12. ball screw; 13. moving plate. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] like Figures 1 to 4 As shown, the present invention provides a correction device and method for the wear of a substrate glass clamping roller, wherein the device comprises a clamping roller group located at multiple layers of height inside an annealing furnace and symmetrically arranged on the left and right sides, wherein one clamping roller group consists of two clamping rollers 1, and a glass ribbon 2 is pulled downward between the two clamping rollers 1 in the same clamping roller group, and the roller coating material of the clamping roller 1 is internally mixed with a dye, and when the clamping roller 1 pulls the glass ribbon 2 downward, the clamping roller 1 filled with the dye will produce an indentation on the glass ribbon 2, and an image measuring instrument 3 for photographing the indentation produced by the clamping roller 1 on the glass ribbon 2 is provided below the bottom clamping roller group, and an anti-deflection correction component is provided on one side of the glass ribbon 2, and the anti-deflection correction component drives the clamping roller 1 to achieve displacement.

[0039] Different from the traditional practice, the present invention adopts the reverse thinking. A dye is added to the inside of the clamping roller 1, which will form an indentation on the pulled glass plate. After wear, the indentation is reduced. The speed of the servo motor 1 that needs to be adjusted is reversely deduced through the reduction of the indentation, thereby changing the glass pulling speed. The diameter change of the clamping roller 1 can be monitored in real time and the motor speed can be corrected so that the process parameters can be adjusted immediately according to the material status of the on-site production, thereby finely controlling the operation of the clamping roller 1 and improving the product yield.

[0040] Preferably, an overflow brick 4 installed on the top of the annealing furnace is provided above the topmost clamping roller group, and the glass liquid flows out of the overflow brick 4 and flows downward to form a glass ribbon 2.

[0041] Preferably, the glass ribbon 2 divides the clamping rollers 1 on both sides into a fixed side clamping roller 1-1 and a floating side clamping roller 1-2, the anti-deflection correction component is connected to the bottom of the fixed side clamping roller 1-1, and each clamping roller 1 is provided with a servo motor 5 connected to an external power supply.

[0042] It should be noted that the fixed side clamping roller 1-1 is set to play the role of leaning against and limiting the spatial position of the glass plate. The clamping roller 1 on this side does not move left and right with the glass ribbon 2 by default during operation. The clamping roller 1 on the other side is the floating side clamping roller 1-2, which moves left and right along the guide plate 9 on the top of the mounting plate 8 in real time with the thickness change and swing of the glass ribbon 2.

[0043] After the diameter of the fixed side clamping roller 1-1 is worn here, the glass ribbon 2 pulled down through the center of the overflow brick 4 will deviate to the side of the fixed clamping roller 1, thereby deviating from the original center of the geometric position of the equipment. At this time, the diameter wear amount of the fixed side clamping roller 1-1 can be measured according to the method of the present invention, and the position of the fixed side clamping roller 1-1 can be adjusted by the servo motor 2 11 through the clamping roller 1 position control, so that the glass ribbon 2 pulled down through the center of the overflow brick 4 is always in the center line position of the equipment, avoiding the situation where the position of the glass ribbon 2 is deviated during the process of pulling down.

[0044] Preferably, the number of layers of the clamping roller groups is not less than two, and in an initial state, the gaps between each clamping roller group are consistent and in the same vertical direction.

[0045] Through the multi-layer clamping roller group, when the glass ribbon 2 is descending, after multiple tractions, the clamping rollers 1 of each group are set to be consistent in the initial state, so that the glass ribbon 2 pulled down through the center of the overflow brick 4 is always in a vertical state, so that the glass ribbon 2 maintains uniform force during the pulling process.

[0046] Preferably, the working surface width of the clamping roller 1 of the upper layer is smaller than the working surface width of the clamping roller 1 of the lower layer, and the inside of the clamping roller 1 of each layer has inconsistent dyes.

[0047] It should be noted that, after each layer of clamping rollers 1 pulls the glass ribbon 2, a corresponding color band will be left behind, and the imprint of the lower layer of clamping rollers 1 will not completely cover the imprint of the upper layer of clamping rollers 1, so that the subsequent image measuring instrument 3 can also measure the corresponding imprint width value after distinction, and clearly know the consumption of each layer of clamping rollers 1.

[0048] Preferably, the image measuring instrument 3 is installed at the exit of the road furnace, there are two image measuring instruments 3 on one side of the glass ribbon 2 , and the image measuring instruments 3 are located directly below the working surface of the clamping roller 1 .

[0049] It should be noted that the image measuring instrument 3 can record the indentation of the clamping roller 1 on the glass ribbon 2, so as to know the consumption of the clamping roller 1. According to the above method, the motor speed can be flexibly adjusted to control the pulling speed of the glass ribbon 2.

[0050] Preferably, a sliding plate 6 is provided at the bottom of the servo motor 5 , and a slider 7 is symmetrically provided at the bottom of the sliding plate 6 , the vertical section of the slider 7 is concave downward, and a mounting plate 8 is provided below the sliding plate 6 .

[0051] Preferably, the mounting plate 8 is mounted on the outside of the annealing furnace by means of a frame, and guide plates 9 are symmetrically arranged on the top of the mounting plate 8 , and the slider 7 is slidably connected to the guide plates 9 .

[0052] It should be noted that the sliding plate 6 and the slider 7 are fixedly connected, and the guide plate 9 on the top of the mounting plate 8 cooperates with the slider 7, so that the floating side clamping rollers 1-2 can be adjusted automatically according to the width of the glass ribbon 2. At the same time, because the hardness of the clamping roller 1 is greater than the hardness of the glass ribbon 2, it is designed to be floating, which can effectively avoid the situation where the glass ribbon 2 is clamped during the pulling down process of the glass ribbon 2, thereby protecting the glass ribbon 2.

[0053] Preferably, the anti-bias correction component includes a positioning plate 10, a servo motor 11, a ball screw 12 and a movable plate 13. The positioning plate 10 is connected to the side wall of the mounting plate 8 and on the side close to the fixed side clamping roller 1-1. The vertical section of the positioning plate 10 is L-shaped. The servo motor 11 is connected to the positioning plate 10. The servo motor 11 is connected to the ball screw 12 through a coupling. The ball screw 12 extends to the bottom of the sliding plate 6 on the fixed side clamping roller 1-1. The movable plate 13 is fixedly connected to the bottom of the sliding plate 6 on the fixed side clamping roller 1-1, and the ball screw 12 passes through the movable plate 13 and is rotatably connected thereto.

[0054] It should be noted that, by installing a servo motor 11 on the fixed side of the clamping roller 1, the servo motor 11 drives the ball screw 12 to rotate. When the wear amount of the clamping roller 1 is known, the servo motor 11 can drive the ball screw 12 to move the fixed side clamping roller 1-1 to the middle position, so that the glass ribbon 2 contacted by the clamping roller 1 is always in the center line position of the equipment, and the glass ribbon 2 pulled down through the center of the overflow brick 4 is always in the center line position of the equipment, keeping the glass ribbon 2 in a vertical manner, and there will be no deviation in the pull-down position.

[0055] Detailed usage and effects of the above embodiments:

[0056] The clamping roller 1 is installed inside the annealing furnace. After the processing of the clamping roller 1 is completed, the initial working surface width and diameter are consistent. The initial working surface width is D and the diameter is R. After the glass liquid flows through the overflow brick 4, it will be pulled downward from between the two clamping rollers 1. In the default state, the position of the clamping roller 1-1 on the fixed side will not change, and the position of the clamping roller 1-2 on the floating side is sliding, thereby avoiding the situation of clamping the glass ribbon 2. Under long-term traction, because the position of the clamping roller 1 on the fixed side will not change, the clamping roller 1 will cause wear and the width of its working surface will decrease. Start the servo motor 11, the servo motor 11 cooperates with the ball screw, and the movable plate 13 has a ball nut that cooperates with the ball screw, thereby driving the slider 7 to move on the guide plate 9, and the sliding plate 6 will move toward the direction of the glass ribbon 2, so that after the diameter is reduced, the position of the glass ribbon 2 can still be kept without deviation.

[0057] At the same time, an image measuring instrument 3 is installed at the exit of the annealing furnace. The image measuring instrument 3 monitors the indentation left by the clamping roller 1 on the glass ribbon 2 in real time. When the length of the indentation becomes smaller, the image measuring instrument 3 measures that the actual working surface width of the clamping roller 1 after wear is d. Through the above calculation formula, we can obtain the actual diameter R1 of the clamping roller 1 after wear, and then deduce the actual speed of the motor that needs to be adjusted according to the formula, realizing reverse deduction, so that the glass pulling speed does not change. By knowing the consumption of the clamping roller 1, the speed of the motor can be reversely deduced, thereby ensuring the uniformity of the glass ribbon 2 pulling down and improving the product yield.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device and method for correcting the wear of a substrate glass clamping roller, characterized in that: The invention comprises a clamping roller group located at multiple layers of height inside an annealing furnace and symmetrically arranged on the left and right sides. A clamping roller group is composed of two clamping rollers (1). A glass ribbon (2) is pulled downward between the two clamping rollers (1) in the same clamping roller group. The roller coating material of the clamping roller (1) is internally mixed with a dye. When the clamping roller (1) pulls the glass ribbon (2) downward, the clamping roller (1) filled with the dye will produce an indentation on the glass ribbon (2). An image measuring instrument (3) for photographing the indentation produced by the clamping roller (1) on the glass ribbon (2) is provided below the clamping roller group at the bottom layer. An anti-deflection correction component is provided on one side of the glass ribbon (2). The anti-deflection correction component drives the clamping roller (1) to achieve displacement.

2. The device and method for correcting the wear of the substrate glass clamping roller according to claim 1, characterized in that: An overflow brick (4) installed on the top of the annealing furnace is arranged above the topmost clamping roller group, and the glass liquid flows out of the overflow brick (4) and flows downward to form a glass ribbon (2).

3. The device and method for correcting the wear of the substrate glass clamping roller according to claim 1, characterized in that: The glass ribbon (2) divides the clamping rollers (1) on both sides into fixed side clamping rollers (1-1) and floating side clamping rollers (1-2); the anti-deflection correction component is connected to the bottom of the fixed side clamping roller (1-1); and each clamping roller (1) is provided with a servo motor (5) connected to an external power supply.

4. The device and method for correcting the wear of the substrate glass clamping roller according to claim 1, characterized in that: The number of layers of the clamping roller groups is not less than two, and in an initial state, the gaps between each of the clamping roller groups are consistent and in the same vertical direction.

5. The device and method for correcting the wear of the substrate glass clamping roller according to claim 4, characterized in that: The working surface width of the clamping roller (1) of the upper layer is smaller than the working surface width of the clamping roller (1) of the lower layer, and the clamping roller (1) of each layer has inconsistent dye inside.

6. The device and method for correcting the wear of the substrate glass clamping roller according to claim 1, characterized in that: The image measuring instrument (3) is installed at the exit of the annealing furnace. There are two image measuring instruments (3) on one side of the glass ribbon (2), and the image measuring instruments (3) are located directly below the working surface of the clamping roller (1).

7. The device and method for correcting the wear of the substrate glass clamping roller according to claim 3, characterized in that: A sliding plate (6) is provided at the bottom of the servo motor (5), and a slider (7) is symmetrically provided at the bottom of the sliding plate (6). The vertical section of the slider (7) is concave downward, and a mounting plate (8) is provided below the sliding plate (6).

8. The device and method for correcting the wear of the substrate glass clamping roller according to claim 7, characterized in that: The mounting plate (8) is mounted on the outside of the annealing furnace by means of a frame, a guide plate (9) is symmetrically arranged on the top of the mounting plate (8), and the slider (7) is slidably connected to the guide plate (9).

9. The device and method for correcting the wear of the substrate glass clamping roller according to claim 1, characterized in that: The anti-bias correction component comprises a positioning plate (10), a servo motor 2 (11), a ball screw (12) and a movable plate (13); the positioning plate (10) is connected to the side wall of the mounting plate (8) and on the side close to the fixed side clamping roller (1-1); the vertical section of the positioning plate (10) is L-shaped; the servo motor 2 (11) is connected to the positioning plate (10); the servo motor 2 (11) is connected to the ball screw (12) through a coupling; the ball screw (12) extends to the bottom of the sliding plate (6) on the fixed side clamping roller (1-1); the movable plate (13) is fixedly connected to the bottom of the sliding plate (6) on the fixed side clamping roller (1-1); and the ball screw (12) passes through the movable plate (13) and is rotatably connected thereto.

10. A method for correcting the wear of a glass substrate clamping roller according to any one of claims 1 to 9, comprising the following specific steps: S1: First, the gap size of each group of the clamping rollers (1) is adjusted so that they remain consistent in the initial state. After the glass liquid enters the overflow brick (4), it flows down from the overflow brick (4). The fixed side clamping roller (1-1) is limited by the anti-deflection correction component. The clamping roller (1) on this side does not move left and right with the glass ribbon (2) during operation. The floating side clamping roller (1-2) on the other side moves slightly left and right along the slider (7). When the diameter of the fixed side clamping roller (1-1) is worn, the glass ribbon (2) pulled down through the center of the overflow brick (4) deviates to the side of the fixed clamping roller (1), thereby deviating from the original center of the geometric position of the equipment. S2: After the diameter of the clamping roller (1) on the fixed side becomes smaller, the clamping roller (1-2) on the floating side will press the glass to deviate from the geometric center of the original flow direction. After adjusting the rotation speed of the servo motor one (5), the servo motor two (11) is started. The servo motor two (11) will drive the ball screw (12) to rotate, so that the moving plate (13) moves. The moving plate (13) and the sliding plate (6) cooperate with each other, so that the clamping roller (1-1) on the fixed side moves toward the direction of the glass ribbon (2), so that the glass liquid is always kept in a centered position between the two clamping rollers (1). S3: In the initial state, the working surface width of the clamping roller (1) is measured as D, and the initial diameter is R. The working surface of the clamping roller (1) is photographed using the image measuring instrument (3), and the actual working surface width of the clamping roller (1) after wear during operation is accurately measured as d, which is equivalent to the length of the indentation produced by the clamping roller (1) on the glass ribbon (2). We use the following calculation formula to obtain the instantaneous diameter R1 of the clamping roller (1): After calculating the value of R1, the formula for the glass pull-down speed is: The pulling speed is a given input value of the process and its value is a reference fixed value. The rotation speed of the servo motor 1 (5) is timely adjusted according to the real-time width of the clamping roller (1), so that the clamping rollers (1) on both sides of the glass ribbon (2) maintain different rotation speeds, but can also achieve uniform pulling of the glass ribbon (2).

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