Automatic supporting equipment for glass substrate

Abstract

The invention discloses automatic glass substrate supporting equipment, which relates to the technical field of glass substrate production and comprises a distance adjusting module, a first lifting module, a second lifting module, a first supporting module, a second supporting module, a position sensor and a control system. The distance adjusting module adjusts the distance between the two lifting modules, the lifting modules drive the supporting module to ascend and descend, the supporting module makes contact with glass through a roller shaft and is matched with the pressure sensor to control the supporting force, and the position sensor detects the in-place state of the glass. The control system receives signals of the sensors and automatically regulates and controls the modules to act in combination with preset parameters, and accurate adaptation of the supporting distance, height and force is achieved. The equipment does not need manual operation, can efficiently adapt to glass of different specifications, improves the efficiency and safety of machining, transportation and installation, and is suitable for scenes such as liquid crystal glass semi-finished product machining.

Description

Technical Field

[0001] The present invention relates to the technical field of glass substrate production, and in particular to automatic glass substrate supporting equipment. Background Art

[0002] In the production of liquid crystal glass substrates, the semi-finished product processing procedure is a key link. It mainly performs a series of processes on the glass flowing out of the muffle furnace, including horizontal segment cutting, robot loading, weighing, longitudinal cutting, cooling, thickness measurement, automatic inspection, manual sampling, sorting, and unloading. It is responsible for the transmission, weighing, longitudinal cutting, sorting, packaging, and feeding of the formed, drawn, and horizontally cut glass plates to the grinding mill.

[0003] Support and positioning are essential operations in glass processing, handling, and installation. Traditional methods rely on manual adjustment of the glass support height, which is inefficient and lacks precision. During processing, inaccurate height can easily lead to deviations in processing position, affecting product quality and increasing the defective rate. During handling, an inappropriate height can cause the glass's center of gravity to be unstable, making it prone to slipping, causing damage and safety accidents. During installation, the inability to accurately adjust the installation process increases construction difficulty, prolongs time, and reduces efficiency. Therefore, a method for automatically adjusting glass support is urgently needed to solve these problems. Summary of the Invention

[0004] In order to solve the technical problems existing in the background technology, the present invention provides an automatic glass substrate supporting device.

[0005] In a first aspect, the present invention provides an automatic glass substrate supporting device, comprising:

[0006] A distance adjustment module, which is symmetrically installed on the ground or the upper part of the working platform;

[0007] A first lifting module and a second lifting module, wherein the first lifting module and the second lifting module are symmetrically installed at the driving end of the distance adjustment module;

[0008] A first supporting module and a second supporting module, wherein the first supporting module and the second supporting module are correspondingly installed on top of the first lifting module and the second lifting module;

[0009] A position sensor is installed at the rear end of the first supporting module to detect whether the glass substrate is in place;

[0010] The distance adjustment module synchronously drives the first lifting module and the second lifting module to move closer or farther away. The first lifting module and the second lifting module synchronously adjust the heights of the first supporting module and the second supporting module to adapt to glass substrates of different sizes.

[0011] Furthermore, the distance adjustment module includes a base, a first motor is installed on the upper part of the base, the driving end of the first motor is connected to the first screw rod, the outer part of the first screw rod is threadedly connected to the first threaded seat and the second threaded seat respectively, the top ends of the first threaded seat and the second threaded seat are correspondingly connected to the first carrier plate and the second carrier plate, and the first lifting module and the second lifting module are correspondingly installed on the upper part of the first carrier plate and the second carrier plate.

[0012] Furthermore, the surface of the first screw rod is provided with a forward thread and a reverse thread, and the first thread seat and the second thread seat are correspondingly threadedly connected to the outside of the forward thread and the reverse thread to drive the first carrier plate and the second carrier plate to move closer or farther away.

[0013] Furthermore, a track is symmetrically mounted on the upper portion of the base, and rollers are symmetrically mounted on the bottom ends of the first carrier plate and the second carrier plate, and the rollers roll inside the track.

[0014] Furthermore, the first lifting module and the second lifting module both include an inner column, the outer portion of the inner column is slidably connected to the outer column, a second motor is installed on the inner side of the top of the inner column, the driving end of the second motor is connected to the second screw rod, the external thread of the second screw rod is connected to the third threaded seat, and the third threaded seat is connected to the inner side of the outer column.

[0015] Furthermore, both sides of the top of the inner column are connected to the first guide protrusions, and both sides of the outer column are provided with first guide grooves, and the first guide protrusions slide inside the first guide grooves.

[0016] Furthermore, the first supporting module and the second supporting module both include an outer beam, the interior of the outer beam is slidingly connected to the inner beam, the interior of the inner beam is rotationally connected to a number of equally spaced supporting rollers, and the outer side surfaces of the supporting rollers protrude from the open end surface of the inner beam.

[0017] Furthermore, a pressure sensor is installed in the middle of the outer beam, and a detection end of the pressure sensor extends to the inside of the outer beam and abuts against the surface of the inner beam.

[0018] Furthermore, the outer beam and the inner beam are commonly connected to a number of equally distributed buffers, and the buffers include a fixed sleeve, a telescopic sleeve and a spring. The telescopic sleeve is movably arranged inside the fixed sleeve, and the two are offset by a spring. The top and bottom ends of the outer beam are each provided with a number of second guide grooves, and the top and bottom ends of the inner beam are each connected to a number of second guide bosses, and the second guide bosses are movable inside the second guide grooves.

[0019] In a second aspect, the present invention provides a control system for an automatic glass substrate supporting device, comprising a main control module, a signal receiving module, a drive control module, a parameter storage module, and a human-computer interaction module. The signal receiving module is electrically connected to a position sensor and a pressure sensor of the device, and is configured to receive, in real time, a glass substrate arrival signal from the position sensor, and signals from the pressure sensor indicating the supporting force of the first and second supporting modules on the glass substrate.

[0020] The parameter storage module pre-stores adaptation parameters corresponding to glass substrates of different specifications, wherein the adaptation parameters include a target distance between the first supporting module and the second supporting module, a target height, and a preset range of support strength;

[0021] The human-computer interaction module is used for the operator to input specific parameters of the glass substrate and display the equipment operation status and real-time parameters;

[0022] The main control module is electrically connected to the signal receiving module, the parameter storage module, and the human-computer interaction module, respectively, and is used to receive the in-position signal and the supporting force signal transmitted by the signal receiving module, and call the corresponding adaptation parameters in the parameter storage module based on the specific parameters of the glass substrate input by the human-computer interaction module, and generate control instructions through comparative analysis;

[0023] The drive control module is electrically connected to the main control module, the first motor of the distance adjustment module, and the second motors of the first lifting module and the second lifting module, respectively, and is used to receive control instructions from the main control module, drive the first motor to adjust the distance between the first supporting module and the second supporting module to the target distance, and the supporting force for the glass substrate, and drive the second motor to adjust the height of the first supporting module and the second supporting module to the target height.

[0024] The beneficial effects of the present invention are as follows: by automatically adjusting the glass support height, no manual operation is required, and the height adjustment time can be significantly shortened, so that the glass processing and transportation links such as horizontal segment cutting, Robot loading, weighing, and longitudinal cutting in the semi-finished product processing process can be carried out more quickly, thereby improving overall work efficiency and increasing the output per unit time on large-scale production lines. At the same time, with precise sensor detection and control unit calculation, the support height is guaranteed to be accurate, reducing product quality problems, safety accidents and construction difficulties caused by height deviation, improving processing quality and safety, and being able to flexibly adapt to glass of different specifications and enhance applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the split structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the split structure of the distance adjustment module in the present invention;

[0027] Figure 3 This is a schematic diagram of the assembly structure of the distance adjustment module in the present invention;

[0028] Figure 4 This is a schematic diagram of the split structure of the first and second lifting modules in the present invention;

[0029] Figure 5 This is a schematic diagram of the assembly structure of the first and second lifting modules in the present invention;

[0030] Figure 6 A half-section view of the assembled first and second lifting modules of the present invention;

[0031] Figure 7 This is a schematic diagram of the split structure of the first and second supporting modules in the present invention;

[0032] Figure 8 This is a schematic diagram of the assembly structure of the first and second supporting modules in the present invention;

[0033] Figure 9 This is a top view of the first and second supporting modules after assembly in the present invention;

[0034] Figure 10 For the present invention Figure 9 Sectional view of AA in the middle;

[0035] Figure 11 For the present invention Figure 9 Cross-sectional view of the middle BB;

[0036] Figure 12 It is a schematic diagram of the assembly structure of the present invention;

[0037] Figure 13 A side view of the present invention after assembly;

[0038] Figure 14 It is a structural block diagram of the control system of the present invention.

[0039] In the figure: 1. distance adjustment module; 11. base; 12. first motor; 13. first screw rod; 14. forward thread; 15. reverse thread; 16. first thread seat; 17. second thread seat; 18. first carrier plate; 19. second carrier plate; 110. track; 111. roller; 2. first lifting module; 21. inner column; 22. outer column; 23. second motor; 24. second screw rod; 25. third thread seat; 26. first guide boss; 27. first guide groove; 3. second lifting module; 4. first supporting module; 41. outer beam; 42. inner beam; 43. supporting roller; 44. pressure sensor; 45. buffer; 46. second guide boss; 47. second guide groove; 5. second supporting module; 6. position sensor; 7. glass substrate. DETAILED DESCRIPTION

[0040] Reference Figure 1 、 12 13. The present invention proposes an automatic glass substrate supporting device, which is mainly composed of a distance adjustment module 1, a first lifting module 2, a second lifting module 3, a first supporting module 4, a second supporting module 5 and a position sensor 6; the distance adjustment module 1 is symmetrically installed on the ground or the upper part of the work platform, providing a basic distance adjustment function for the entire device; the first lifting module 2 and the second lifting module 3 are symmetrically installed at the driving end of the distance adjustment module 1, responsible for adjusting the height of the supporting module; the first supporting module 4 and the second supporting module 5 are correspondingly installed at the top of the first lifting module 2 and the second lifting module 3, directly contacting the glass substrate 7 and performing the supporting action; the position sensor 6 is installed at the tail end of the first supporting module 4, used to detect whether the glass substrate 7 is in place. The specific technical solution is as follows:

[0041] Reference Figure 2 、 3 The distance adjustment module 1 includes a base 11, which is firmly mounted on the ground or a work platform. A first motor 12 is installed on the upper part of the base 11. The first motor 12 serves as a power source, and its driving end is connected to a first screw rod 13. The surface of the first screw rod 13 is uniquely provided with a forward thread 14 and a reverse thread 15, and is respectively threadedly connected to a first thread seat 16 and a second thread seat 17. The top ends of the first thread seat 16 and the second thread seat 17 are correspondingly connected to a first carrier plate 18 and a second carrier plate 19, and the first lifting module 2 and the second lifting module 3 are correspondingly installed on the upper parts of the first carrier plate 18 and the second carrier plate 19.

[0042] When the distance between the first lifting module 2 and the second lifting module 3 needs to be adjusted to accommodate glass substrates 7 of different sizes, the first motor 12 is activated. The first motor 12 drives the first screw 13 to rotate. Since the first threaded seat 16 and the second threaded seat 17 are respectively threadedly connected to the outside of the forward thread 14 and the reverse thread 15, according to the principle of screw transmission, the first threaded seat 16 and the second threaded seat 17 will move toward or away from each other along the first screw 13, thereby driving the first carrier plate 18 and the second carrier plate 19 to move closer or farther away, thereby adjusting the distance between the first lifting module 2 and the second lifting module 3.

[0043] To ensure smooth movement and load-bearing capacity of the first and second carriers 18, 19, rails 110 are symmetrically mounted on the top of the base 11. Rollers 111 are also symmetrically mounted on the bottoms of the first and second carriers 18, 19. During movement, the rollers 111 roll within the rails 110, effectively reducing resistance and preventing the carriers from shifting or shaking during movement, ensuring stable and reliable distance adjustment.

[0044] Reference Figure 4 、 5 6. The structures and working principles of the first lifting module 2 and the second lifting module 3 are the same. The following detailed description is given taking the first lifting module 2 as an example. The first lifting module 2 includes an inner column 21, the outer portion of the inner column 21 is slidably connected to the outer column 22, a second motor 23 is installed on the inner side of the top of the inner column 21, the driving end of the second motor 23 is connected to the second screw rod 24, the outer portion of the second screw rod 24 is threadedly connected to the third threaded seat 25, and the third threaded seat 25 is connected to the inner side of the outer column 22;

[0045] When the height of the first supporting module 4 needs to be adjusted, the second motor 23 is started, and the second motor 23 drives the second screw rod 24 to rotate. Since the third threaded seat 25 is threadedly connected to the second screw rod 24, and the third threaded seat 25 is connected to the inner side of the outer column 22, according to the principle of screw transmission, the outer column 22 will slide up and down along the inner column 21, thereby realizing the adjustment of the height of the first supporting module 4. Similarly, the second lifting module 3 realizes the adjustment of the height of the second supporting module 5 through the same structure and working principle, so that the first supporting module 4 and the second supporting module 5 can be raised and lowered synchronously to adapt to the height requirements of glass substrates 7 of different sizes;

[0046] To ensure smooth and accurate sliding of the outer column 22 on the inner column 21, first guide protrusions 26 are connected to both sides of the top of the inner column 21, and first guide grooves 27 are provided on both sides of the outer column 22. During the sliding process of the outer column 22, the first guide protrusions 26 slide inside the first guide grooves 27, playing a guiding and limiting role, preventing the outer column 22 from deflecting or getting stuck during the sliding process, and ensuring a smooth and stable lifting process;

[0047] Reference Figure 7 、 8 , 9, 10, 11, the structures and working principles of the first supporting module 4 and the second supporting module 5 are consistent, and the following description will be made using the first supporting module 4 as an example. The first supporting module 4 includes an outer beam 41, the inner portion of the outer beam 41 is slidably connected to the inner beam 42, and the inner portion of the inner beam 42 is rotatably connected to a number of equidistantly distributed supporting rollers 43, the outer side surfaces of the supporting rollers 43 protrude from the open end surface of the inner beam 42. When the glass substrate 7 is in place, the supporting rollers 43 contact the side surfaces of the glass substrate 7. During the movement of the glass substrate 7, the supporting rollers 43 reduce the friction force on the glass substrate 7 by rolling friction, and at the same time play a supporting and guiding role, preventing the glass substrate 7 from deflecting or shaking during movement;

[0048] In order to accurately control the supporting force, a pressure sensor 44 is installed in the middle of the outer beam 41. The detection end of the pressure sensor 44 extends to the inside of the outer beam 41 and contacts the surface of the inner beam 42. When the supporting roller 43 is subjected to the pressure of the glass substrate 7, the inner beam 42 will generate corresponding pressure on the pressure sensor 44 inside the outer beam 41. The pressure sensor 44 transmits the detected pressure signal to the control system. The control system determines whether the supporting force is appropriate based on the preset pressure range and adjusts the supporting force by adjusting the distance adjustment module 1 and the lifting module to ensure that the glass substrate 7 is stably and appropriately supported.

[0049] In addition, a plurality of buffers 45 distributed at equal distances are connected between the outer beam 41 and the inner beam 42. The buffers 45 can act as a buffer when the inner beam 42 is subjected to a large pressure, thereby preventing the inner beam 42 from damaging the outer beam 41 due to excessive pressure. At the same time, the buffers 45 can also ensure the stability of the supporting process. In order to further improve the sliding stability of the inner beam 42 in the outer beam 41, a plurality of second guide grooves 47 are provided at the top and bottom ends of the outer beam 41. The top and bottom ends of the inner beam 42 are connected to a plurality of second guide protrusions 46. The second guide protrusions 46 move inside the second guide grooves 47, playing a guiding and limiting role, thereby ensuring that the inner beam 42 can slide accurately and smoothly in the outer beam 41.

[0050] A position sensor 6 is mounted at the rear end of the first supporting module 4 to detect whether the glass substrate 7 is in place. When the glass substrate 7 moves on the conveyor and approaches the supporting device, the position sensor 6 detects the arrival of the glass substrate 7 and transmits a signal to the control system. Upon receiving the signal, the control system first controls the first motor 12 of the distance adjustment module 1 based on the size of the glass substrate 7, adjusting the distance between the first lifting module 2 and the second lifting module 3 so that the spacing between the first supporting module 4 and the second supporting module 5 matches the width of the glass substrate 7. The control system then controls the second motor 23 of the first lifting module 2 and the second lifting module 3 to adjust the height of the first supporting module 4 and the second supporting module 5 to match the height of the glass substrate 7. When the glass substrate 7 is fully in place, the supporting roller 43 contacts the side of the glass substrate 7 and begins to support the glass substrate 7. During the support process, the pressure sensor 44 monitors the support force in real time and feeds the data back to the control system. The control system promptly adjusts the distance adjustment module 1 and the lifting module based on the feedback data to ensure that the glass substrate 7 is always stably and appropriately supported until the glass substrate 7 completes subsequent processing or transportation tasks.

[0051] See also Figure 14A control system for an automatic glass substrate supporting device includes a main control module, a signal receiving module, a drive control module, a parameter storage module, and a human-computer interaction module. The signal receiving module is electrically connected to a position sensor 6 and a pressure sensor 44 of the device, and is used to receive in real time a signal indicating that the glass substrate 7 is in position, sent by the position sensor 6, and a signal indicating the supporting force of the first supporting module 4 and the second supporting module 5 on the glass substrate 7, sent by the pressure sensor 44.

[0052] The parameter storage module pre-stores adaptation parameters corresponding to glass substrates 7 of different specifications, and the adaptation parameters include a target distance between the first supporting module 4 and the second supporting module 5, a target height, and a preset range of support strength;

[0053] The human-computer interaction module is used for the operator to input specific parameters of the glass substrate 7 and display the equipment operation status and real-time parameters;

[0054] The main control module is electrically connected to the signal receiving module, the parameter storage module, and the human-computer interaction module, and is used to receive the arrival signal and the support force signal transmitted by the signal receiving module, and call the corresponding adaptation parameters in the parameter storage module based on the specific parameters of the glass substrate 7 input by the human-computer interaction module, and generate control instructions through comparative analysis;

[0055] The drive control module is electrically connected to the main control module, the first motor 12 of the distance adjustment module 1, and the second motor 23 of the first lifting module 2 and the second lifting module 3, respectively, and is used to receive control instructions from the main control module, drive the first motor 12 to work to adjust the distance between the first supporting module 4 and the second supporting module 5 to the target distance, and the supporting force for the glass substrate 7, and drive the second motor 23 to work to adjust the height of the first supporting module 4 and the second supporting module 5 to the target height.

[0056] When the position sensor 6 detects that the glass substrate 7 is in place and sends an in-place signal to the main control module, the main control module starts the above-mentioned adjustment process; during the glass substrate supporting process, the signal receiving module continuously receives the supporting force signal of the pressure sensor and transmits it to the main control module. If the supporting force exceeds the preset range, the main control module fine-tunes the first motor and / or the second motor through the drive control module to keep the supporting force within the preset range.

[0057] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A glass substrate automatic supporting device, characterized in that: include: A distance adjustment module (1), wherein the distance adjustment module (1) is symmetrically installed on the ground or the upper part of the working platform; A first lifting module (2) and a second lifting module (3), wherein the first lifting module (2) and the second lifting module (3) are symmetrically mounted on a driving end of the distance adjustment module (1); A first supporting module (4) and a second supporting module (5), wherein the first supporting module (4) and the second supporting module (5) are correspondingly mounted on the top ends of the first lifting module (2) and the second lifting module (3); A position sensor (6), the position sensor (6) being mounted at the rear end of the first supporting module (4) to detect whether the glass substrate (7) is in place; The distance adjustment module (1) synchronously drives the first lifting module (2) and the second lifting module (3) to move closer or farther away, and the first lifting module (2) and the second lifting module (3) synchronously adjust the heights of the first supporting module (4) and the second supporting module (5) to adapt to glass substrates (7) of different sizes.

2. The automatic glass substrate supporting device according to claim 1, characterized in that: The distance adjustment module (1) includes a base (11), a first motor (12) is installed on the upper part of the base (11), a driving end of the first motor (12) is connected to a first screw rod (13), the outer part of the first screw rod (13) is respectively threadedly connected to a first threaded seat (16) and a second threaded seat (17), the top ends of the first threaded seat (16) and the second threaded seat (17) are correspondingly connected to a first carrier plate (18) and a second carrier plate (19), and the first lifting module (2) and the second lifting module (3) are correspondingly installed on the upper parts of the first carrier plate (18) and the second carrier plate (19).

3. The automatic glass substrate supporting device according to claim 2, characterized in that: The surface of the first screw rod (13) is provided with a forward thread (14) and a reverse thread (15); the first thread seat (16) and the second thread seat (17) are correspondingly threadedly connected to the outside of the forward thread (14) and the reverse thread (15) to drive the first carrier plate (18) and the second carrier plate (19) to move closer or farther away.

4. The automatic glass substrate supporting device according to claim 2, characterized in that: A track (110) is symmetrically mounted on the upper portion of the base (11), and rollers (111) are symmetrically mounted on the bottom ends of the first carrier plate (18) and the second carrier plate (19), and the rollers (111) roll inside the track (110).

5. The automatic glass substrate supporting device according to claim 1, characterized in that: The first lifting module (2) and the second lifting module (3) both include an inner column (21), the outer portion of the inner column (21) is slidably connected to the outer column (22), a second motor (23) is installed on the inner side of the top of the inner column (21), a driving end of the second motor (23) is connected to a second screw rod (24), an outer thread of the second screw rod (24) is connected to a third threaded seat (25), and the third threaded seat (25) is connected to the inner side of the outer column (22).

6. The automatic glass substrate supporting device according to claim 5, characterized in that: Both sides of the top of the inner column (21) are connected to the first guide protrusions (26), and both sides of the outer column (22) are provided with first guide grooves (27), and the first guide protrusions (26) slide inside the first guide grooves (27).

7. The automatic glass substrate supporting device according to claim 1, characterized in that: The first supporting module (4) and the second supporting module (5) both include an outer beam (41), the interior of the outer beam (41) is slidably connected to the inner beam (42), the interior of the inner beam (42) is rotatably connected to a plurality of equidistantly distributed supporting rollers (43), and the outer side surfaces of the supporting rollers (43) protrude from the open end surface of the inner beam (42).

8. The automatic glass substrate supporting device according to claim 7, characterized in that: A pressure sensor (44) is installed in the middle of the outer beam (41), and a detection end of the pressure sensor (44) extends to the inside of the outer beam (41) and abuts against the surface of the inner beam (42).

9. The automatic glass substrate supporting device according to claim 7, characterized in that: The outer beam (41) and the inner beam (42) are connected to a plurality of buffers (45) distributed at equal distances. The top and bottom ends of the outer beam (41) are provided with a plurality of second guide grooves (47). The top and bottom ends of the inner beam (42) are connected to a plurality of second guide protrusions (46). The second guide protrusions (46) move inside the second guide grooves (47).

10. A control system for the automatic glass substrate supporting device according to any one of claims 1 to 9, characterized in that: The device comprises a main control module, a signal receiving module, a drive control module, a parameter storage module and a human-computer interaction module. The signal receiving module is electrically connected to a position sensor (6) and a pressure sensor (44) of the device, respectively, and is used to receive in real time a signal indicating that the glass substrate (7) is in position, sent by the position sensor (6), and a signal indicating the supporting force of the first supporting module (4) and the second supporting module (5) on the glass substrate (7), sent by the pressure sensor (44); The parameter storage module pre-stores adaptation parameters corresponding to glass substrates (7) of different specifications, wherein the adaptation parameters include a target distance between the first supporting module (4) and the second supporting module (5), a target height, and a preset range of support strength; The human-machine interaction module is used for an operator to input specific parameters of the glass substrate (7) and to display the equipment operation status and real-time parameters; The main control module is electrically connected to the signal receiving module, the parameter storage module, and the human-computer interaction module, and is used to receive the in-position signal and the supporting force signal transmitted by the signal receiving module, and call the corresponding adaptation parameters in the parameter storage module in combination with the specific parameters of the glass substrate (7) input by the human-computer interaction module, and generate a control instruction through comparative analysis; The drive control module is electrically connected to the main control module, the first motor (12) of the distance adjustment module (1), and the second motor (23) of the first lifting module (2) and the second lifting module (3), respectively, and is used to receive control instructions from the main control module, drive the first motor (12) to work so as to adjust the distance between the first supporting module (4) and the second supporting module (5) to a target distance, as well as the supporting force for the glass substrate (7), and drive the second motor (23) to work so as to adjust the height of the first supporting module (4) and the second supporting module (5) to a target height.

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