Device for breaking glass longitudinally and control method therefor

Abstract

A device for breaking glass longitudinally, comprising: a base (1); a longitudinal breakage assembly (2); and a lifting assembly comprising a first long crank (61), a second long crank (62), a third long crank (63), and a short crank (7) which are hinged in sequence to the base (1) in a Y direction. Further provided is a method for controlling the device for breaking glass longitudinally. The present application has the beneficial effects of: being able to adapt to a wide range of glass sheet lengths; the number of longitudinal breakage wheel sets required being fewer; reduced apparatus costs; it being possible to automatically select and activate appropriate longitudinal breakage wheel sets on the basis of the length of a glass sheet; internal self-collaboration of a control system; high flexibility; and excellent synchronization. No manual operation is required during the entire longitudinal breakage process, which reduces the work intensity of an operator.

Description

A glass longitudinal breaking device and its control method Technical Field

[0001] This invention belongs to the field of glass processing technology, and in particular relates to a glass longitudinal breaking device and its control method. Background Technology

[0002] Longitudinal breaking refers to the process of breaking and separating longitudinally cut glass sheets along the longitudinal cut seam. Longitudinal breaking devices are generally located in the middle to later stages of a flat glass production line. They include a lifting mechanism and a set of longitudinal breaking wheels. A cylinder in the lifting mechanism drives a crank, causing the longitudinal breaking wheels to rise and strike the passing glass sheet, breaking and separating it. Different glass sheet lengths require different lengths of longitudinal breaking wheels. Shorter glass sheets require short and agile wheels; excessively long wheels consume more time and space, potentially affecting subsequent glass sheet processing. Conversely, longer glass sheets require longer wheels to prevent edge rubbing, multiple chipped corners, and other breaking defects. To adapt to the rapidly changing market, current flat glass production lines typically require glass sheets with a wide length range to be longitudinally broken, generally from 914mm to 4000mm, or even wider. This makes traditional longitudinal breaking devices insufficient for production needs. Currently, the most common approach is to install multiple longitudinal breaking devices with wheels of different lengths, but this undoubtedly increases investment costs. Some manufacturers have tried using two longitudinal bending devices together, but because the lifting mechanism's actuator is a cylinder, the two longitudinal bending devices have poor synchronization, so the longitudinal bending effect is not good.

[0003] Summary of the Invention

[0004] In view of the above-mentioned defects, the purpose of the present invention is to provide a glass longitudinal breaking device that can adapt to glass with different plate lengths.

[0005] This invention provides a glass vertical bending device, comprising: a base; a vertical bending assembly including a first vertical bending wheel group and a second vertical bending wheel group, wherein the top of the first vertical bending wheel group is provided with a plurality of first top wheels evenly spaced along the Y direction, and the top of the second vertical bending wheel group is provided with a plurality of second top wheels evenly spaced along the Y direction; a lifting assembly including a first long crank, a second long crank, a third long crank, and a short crank sequentially hinged to the base along the Y direction, wherein the first long crank, the second long crank, and the third long crank have the same structure, including a first segment and a second segment connected in an L-shape, the connection between the first segment and the second segment being hinged to the base; the short crank includes a third segment and a fourth segment connected in an L-shape, the connection between the third segment and the fourth segment being hinged to the base, and the length of the third segment being the same as the length of the first segment. The length of the fourth segment is less than the length of the second segment; the first segment end of the first long crank is hinged to the first longitudinal lever assembly, the second segment end is hinged to the first piston rod of the first cylinder, and the first cylinder is hinged to the base; the first segment end of the second long crank is hinged to the first longitudinal lever assembly, the second segment end is hinged to the end of the connecting rod fixed to the second cylinder, and a first connecting rod extending in the Y direction is hinged between the second segment of the first long crank and the second segment of the second long crank; the first segment end of the third long crank is hinged to the second longitudinal lever assembly, and the second segment end is hinged to the second piston rod of the second cylinder; the third segment end of the short crank is hinged to the second longitudinal lever assembly, and a second connecting rod extending in the Y direction is hinged between the fourth segment end and the second segment of the third long crank.

[0006] Preferably, the base is further provided with a plurality of support members for supporting the first longitudinal flexing wheel group or the second longitudinal flexing wheel group.

[0007] Preferably, the diameter of the first cylinder is larger than the diameter of the second cylinder.

[0008] Preferably, the length of the first longitudinal bend wheel assembly is less than the length of the second longitudinal bend wheel assembly.

[0009] Preferably, the rotation axes of both the first and second top wheels are parallel to the X direction.

[0010] Preferably, the base is further provided with a plurality of roller assemblies for conveying glass plates along the Y direction, and the longitudinal bending assembly is disposed between two adjacent roller assemblies.

[0011] Preferably, the system further includes a control system, which includes a compressed air source, a two-position three-way solenoid valve, a two-position five-way solenoid valve, and a controller. The two-position five-way solenoid valve includes a first air inlet, a first air outlet, and a second air outlet. The first air inlet is connected to the compressed air source, and the first and second air outlets are respectively connected to a first cylinder. The two-position three-way solenoid valve is normally open and includes a second air inlet and an air outlet. The second air inlet is connected to the compressed air source, and the air outlet is connected to a second cylinder through a quick exhaust valve. The controller is used to control the on / off state of the two-position three-way solenoid valve and the two-position five-way solenoid valve.

[0012] Preferably, the compressed air source is connected to the first air inlet and the second air inlet through an air source processing component.

[0013] Preferably, the first air outlet and the second air outlet are each connected to the first cylinder through a one-way throttle valve.

[0014] The present invention also provides a control method for the aforementioned glass longitudinal breaking device, comprising the following steps:

[0015] S1. When the glass plate to be vertically bent reaches a certain position on the base, the control system determines whether the current vertical bending device is applicable based on the length of the glass plate. If applicable, it jumps to step S2; if not applicable, the vertical bending device does not work.

[0016] S2. The control system selects to activate the first longitudinal bend wheel group alone or to activate the first longitudinal bend wheel group and the second longitudinal bend wheel group simultaneously according to the length of the glass plate. If the first longitudinal bend wheel group is activated alone, the process jumps to step S3. If the first longitudinal bend wheel group and the second longitudinal bend wheel group are activated simultaneously, the process jumps to step S4.

[0017] S3. After a first time delay, the controller energizes the two-position three-way solenoid valve, the second cylinder rapidly exhausts air, and the second piston rod is in a free state within the second cylinder; after a second time delay, when the glass plate to be longitudinally bent reaches directly above the first longitudinal bending wheel assembly, the controller energizes the two-position five-way solenoid valve, the first piston rod extends, and the first longitudinal bending wheel assembly rises; after a third time delay, the controller simultaneously de-energizes the two-position three-way solenoid valve and the two-position five-way solenoid valve, the first piston rod and the second piston rod retract simultaneously, and the first longitudinal bending wheel assembly descends; the value of the second time delay is greater than the value of the first time delay;

[0018] S4. After the fourth time delay, when the glass plate to be bent reaches directly above the first and second bending wheel sets, the controller energizes the two-position five-way solenoid valve, the first piston rod extends, and the first and second bending wheel sets rise simultaneously. After the fifth time delay, the controller de-energizes the two-position five-way solenoid valve, the first piston rod retracts, and the first and second bending wheel sets descend simultaneously.

[0019] The advantages of this invention are that it can adapt to a wide range of glass plate lengths, requires fewer longitudinal bending wheel sets, and reduces equipment costs; it can automatically select and activate the appropriate longitudinal bending wheel set according to the length of the glass plate, and the control system has internal self-coordination, high flexibility, and good synchronization. The entire longitudinal bending process does not require manual operation, reducing the workload of operators. Attached Figure Description

[0020] Figure 1 is a top view of the glass longitudinal breaking device of the present invention;

[0021] Figure 2 is a side view of the glass longitudinal bending device of the present invention when both the first longitudinal bending wheel group and the second longitudinal bending wheel group are in the initial position;

[0022] Figure 3 is a schematic diagram of the control system of the glass longitudinal breaking device of the present invention;

[0023] Figure 4 is a side view of the glass vertical bending device of the present invention when the first vertical bending wheel group is raised;

[0024] Figure 5 is a side view of the glass vertical bending device of the present invention when both the first and second vertical bending wheel groups are raised.

[0025] Figure 6 is a control logic diagram of the glass longitudinal breaking device of the present invention.

[0026] Component designation explanation:

[0027] 1. Base

[0028] 11 Support components

[0029] 2. Longitudinal Bending Component

[0030] 3 First longitudinal wheel assembly

[0031] 31 First Crown Chakra

[0032] 4 Second longitudinal bend wheel assembly

[0033] 41 Second Top Wheel

[0034] 51 First Cylinder

[0035] 511 First Piston Rod

[0036] 52 Second Cylinder

[0037] 521 Second Piston Rod

[0038] 61 First Long Crank

[0039] 62 Second Longest Crank

[0040] 63 Third Longest Crank

[0041] 64 First paragraph

[0042] 65 Second paragraph

[0043] 7 short crank

[0044] 71 Third paragraph

[0045] 72. Fourth paragraph

[0046] 81 First Link

[0047] 82 Second Link

[0048] 9-link

[0049] 100 Gas Source Processing Components

[0050] 200 Two-position three-way solenoid valve

[0051] 300 Quick Exhaust Valve

[0052] 400 Two-position five-way solenoid valve

[0053] 500 one-way throttle valve

[0054] 600 silencer Detailed Implementation

[0055] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0056] In the description of this invention, it should be noted that the terms "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0057] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0059] Figure 1 shows a top view of the glass longitudinal breaking device of the present invention. In the following description, the figures in Figure 1 are used as the reference basis for direction. In Figure 1, the direction upward along the paper of the view is defined as the Y direction, the direction to the right along the paper of the view is defined as the X direction, and the direction perpendicular to the paper of the view and outward is defined as the Z direction.

[0060] As shown in Figures 1 and 2, the present invention provides a glass vertical bending device, which includes a base 1, a vertical bending assembly 2, and a lifting assembly. Multiple roller assemblies (not shown) spaced apart along the X-direction are mounted on the base 1, each roller assembly being used to convey a glass sheet along the Y-direction. The vertical bending assembly 2 is disposed between two adjacent roller assemblies and includes a first vertical bending wheel group 3 and a second vertical bending wheel group 4. The top of the first vertical bending wheel group 3 is provided with multiple first top rollers 31 evenly spaced along the Y-direction, and the top of the second vertical bending wheel group 4 is provided with multiple second top rollers 41 evenly spaced along the Y-direction. The first top rollers 31 and the second top rollers 41 are located on the same straight line extending along the Y-direction, and the rotation axes of both the first top rollers 31 and the second top rollers 41 are parallel to the X-direction. The vertical bending assembly 2 can move up and down along the Z-direction under the drive of the lifting assembly. When the longitudinal breaking device is not in operation, the longitudinal breaking assembly 2 is located below the plane of the roller assembly used to transport the glass sheet. When the longitudinal breaking device is in operation, when the glass sheet to be broken is transported above two adjacent roller assemblies, the lifting assembly drives the longitudinal breaking assembly 2 to rise. The top roller in the longitudinal breaking assembly 2 strikes the glass sheet, breaking it into two pieces. Then, the two roller assemblies transport the two broken glass pieces respectively. Preferably, the length of the first longitudinal breaking roller set 3 is shorter than the length of the second longitudinal breaking roller set 4. This arrangement allows the longitudinal breaking device to adapt to a wider range of glass sheet lengths, and a smaller number of longitudinal breaking roller sets can meet production needs, reducing equipment costs.

[0061] As shown in Figure 2, the lifting assembly includes a first long crank 61, a second long crank 62, a third long crank 63, and a short crank 7, which are sequentially hinged to the base 1 along the Y direction. The first long crank 61, the second long crank 62, and the third long crank 63 have identical structures, each including a first segment 64 and a second segment 65 connected in an L-shape, with the connection between the first segment 64 and the second segment 65 hinged to the base 1. Specifically, the length of the first segment 64 is less than the length of the second segment 65. The short crank 7 includes a third segment 71 and a fourth segment 72 connected in an L-shape, with the connection between the third segment 71 and the fourth segment 72 hinged to the base 1. The length of the third segment 71 is the same as the length of the first segment 64, and the length of the fourth segment 72 is less than the length of the second segment 65.

[0062] The first end of the first long crank 61 is hinged to the bottom of the first longitudinal crank assembly 3, and the second end is hinged to the first piston rod 511 of the first cylinder 51, which is hinged to the base 1. The first end of the second long crank 62 is hinged to the bottom of the first longitudinal crank assembly 3, and the second end is hinged to the end of the connecting rod 9 fixed to the second cylinder 52. A first connecting rod 81 extending in the Y direction is hinged between the second ends of the first long crank 61 and the second ends of the second long crank 62. The first longitudinal crank assembly 3, the first long crank 61, the second long crank 62, and the first connecting rod 81 form a parallelogram structure, which ensures the smooth movement of the first longitudinal crank assembly 3.

[0063] The first end of the third long crank 63 is hinged to the bottom of the second longitudinal swashplate assembly 4, and the second end of the second crank is hinged to the second piston rod 521 of the second cylinder 52. The third end of the short crank 7, 71, is hinged to the bottom of the second longitudinal swashplate assembly 4, and the fourth end of the short crank 7, 72, is hinged to the second end of the third long crank 63 via a second connecting rod 82 extending in the Y direction. The second longitudinal swashplate assembly 4, the third long crank 63, the short crank 7, and the second connecting rod 82 form another parallelogram structure, which ensures the smooth movement of the second longitudinal swashplate assembly 4.

[0064] In one specific embodiment of the present invention, the base 1 is further provided with a plurality of support members 11 for supporting the first longitudinal bending wheel group 3 or the second longitudinal bending wheel group 4, which can ensure that the two are in a stable position when the longitudinal bending device is not working and will not shift. The first cylinder 51 and the second cylinder 52 are both double-acting cylinders, wherein the cylinder diameter of the first cylinder 51 is larger than the cylinder diameter of the second cylinder 52. This arrangement can ensure that the first cylinder 51, as the main drive source, has sufficient thrust to drive the lifting assembly to lift the longitudinal bending assembly 2.

[0065] As shown in Figure 3, the longitudinal bending device of the present invention also includes a control system, which includes a compressed air source, a two-position three-way solenoid valve 200, a two-position five-way solenoid valve 400, and a controller.

[0066] The two-position five-way solenoid valve 400 includes a first air inlet, a first air outlet, a first exhaust outlet, a second air outlet, and a second exhaust outlet. The first air inlet is connected to a compressed air source. The first and second air outlets are respectively connected to two air inlets on the first cylinder 51 via a one-way throttle valve 500. A muffler 600 is connected to each of the first and second exhaust outlets. When the two-position five-way solenoid valve 400 is de-energized, the first piston rod 511 retracts; when the two-position five-way solenoid valve 400 is energized, air enters the first cylinder 51 in the reverse direction, and the first piston rod 511 extends.

[0067] The two-position three-way solenoid valve 200 is normally open and includes a second air inlet, an air outlet, and an exhaust port. The second air inlet is connected to a compressed air source, and the air outlet is connected to one air inlet of the second cylinder 52 via a quick exhaust valve 300. A muffler 600 is connected to the other air inlet of the second cylinder 52 and the exhaust port of the two-position three-way solenoid valve 200. When the two-position three-way solenoid valve 200 is de-energized, the compressed air source continuously supplies compressed air to the quick exhaust valve 300 and the second cylinder 52, causing the second piston rod 521 to retract. When the two-position three-way solenoid valve 200 is energized, no compressed air is input, the valve core of the quick exhaust valve 300 moves, and the gas in the second cylinder 52 is quickly discharged through the quick exhaust valve 300, leaving the second piston rod 521 in a free state within the second cylinder 52.

[0068] Furthermore, the compressed air source is connected to the first air inlet and the second air inlet through the air source processing assembly 100. The air source processing assembly 100 specifically includes one or more of an air filter, a pressure reducing valve, and an oil mist lubricator.

[0069] The controller is used to control the on / off state of the two-position three-way solenoid valve 200 and the two-position five-way solenoid valve 400, and is specifically a PLC or a microcontroller. Preferably, the control system also includes a photoelectric switch mounted on the base 1, which is used to detect whether the glass plate has reached the designated position, and the controller is used to receive the detection signal from the photoelectric switch.

[0070] As shown in Figures 1, 3, and 6, the present invention also provides a control method for the aforementioned glass longitudinal breaking device with a control system, the control method comprising the following steps:

[0071] S1. When the glass plate to be vertically bent reaches a certain position on the base 1, the photoelectric switch detects that the glass plate has reached the designated position. The control system determines whether the length of the glass plate meets the condition that it is less than or equal to the sum of the length L2 of the vertical bending component 2 and 1000mm. If it meets the condition, the current vertical bending device is applicable and the process jumps to step S2. If it does not meet the condition, the current vertical bending device is not applicable and the vertical bending device does not work.

[0072] S2. The control system determines whether the length of the glass plate meets the condition that it is less than or equal to the sum of the length L1 of the first longitudinal bend wheel group 3 and 500mm. If it meets the condition, the first longitudinal bend wheel group 3 is activated alone, and the process jumps to step S3. If it does not meet the condition, the first longitudinal bend wheel group 3 and the second longitudinal bend wheel group 4 are activated simultaneously, and the process jumps to step S4.

[0073] S3. After the first time delay, the controller energizes the two-position three-way solenoid valve 200, causing the second cylinder 52 to rapidly exhaust air, and the second piston rod 521 is in a free state within the second cylinder 52. After the second time delay, when the glass plate to be bent reaches directly above the first bending wheel assembly 3, the controller energizes the two-position five-way solenoid valve 400, as shown in Figure 4. The first piston rod 511 extends, driving the first bending wheel assembly 3 upward through the first long crank 61, the second long crank 62, and the first connecting rod 81. As the second long crank 62 rotates, the cylinder body of the second cylinder 52 moves to the right under the action of the connecting rod 9. At this time, the second piston rod 521 slides out of the second cylinder 52 and is not under force, so the second bending wheel assembly 4 remains stationary. After the third time delay, the controller simultaneously de-energizes the two-position three-way solenoid valve 200 and the two-position five-way solenoid valve 400, causing the first piston rod 511 and the second piston rod 521 to retract simultaneously. The first longitudinal bending wheel assembly 3 descends, and the longitudinal bending assembly 2 returns to its initial position, waiting for the arrival of the next glass plate to be longitudinally bent. The value of the second time delay is greater than that of the first time delay, which can prevent the first longitudinal bending wheel assembly 3 from rising before the gas in the second cylinder 52 is completely discharged, thus affecting the longitudinal bending effect.

[0074] S4. After the fourth time delay, the glass plate to be vertically bent reaches directly above the first vertical bending wheel group 3 and the second vertical bending wheel group 4. The controller energizes the two-position five-way solenoid valve 400, as shown in Figure 5. The first piston rod 511 extends and drives the first vertical bending wheel group 3 to rise through the first long crank 61, the second long crank 62 and the first connecting rod 81. At the same time, as the second long crank 62 rotates, the cylinder body of the second cylinder 52 moves to the right under the drive of the connecting rod 9. Since the second piston rod 521 is in a retracted state, it moves to the right with the second cylinder 52 and drives the third long crank 63 to rotate. Then, through the short crank 7 and the second connecting rod 82, the second vertical bending wheel group 4 rises simultaneously with the first vertical bending wheel group 3. After the fifth time delay, the controller de-energizes the two-position five-way solenoid valve 400, the first piston rod 511 retracts, the first vertical bending wheel group 3 and the second vertical bending wheel group 4 descend simultaneously, and the vertical bending assembly 2 returns to its initial position, waiting for the arrival of the next glass plate to be vertically bent. In step S4, the two-position three-way solenoid valve 200 is always de-energized, and the second piston rod 521 remains in the retracted state.

[0075] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A glass longitudinal breaking device, characterized in that, include: Base; The longitudinal bending assembly includes a first longitudinal bending wheel group and a second longitudinal bending wheel group. The top of the first longitudinal bending wheel group is provided with a plurality of first top wheels evenly spaced along the Y direction, and the top of the second longitudinal bending wheel group is provided with a plurality of second top wheels evenly spaced along the Y direction. The lifting assembly includes a first long crank, a second long crank, a third long crank, and a short crank sequentially hinged to the base along the Y direction. The first long crank, the second long crank, and the third long crank have the same structure, including a first segment and a second segment connected in an L-shape, with the connection between the first segment and the second segment hinged to the base. The short crank includes a third segment and a fourth segment connected in an L-shape, with the connection between the third segment and the fourth segment hinged to the base. The length of the third segment is the same as the length of the first segment, and the length of the fourth segment is less than the length of the second segment. The first end of the first long crank is hinged to the first longitudinal lever assembly, and the second end is hinged to the first piston rod of the first cylinder, which is hinged to the base; the first end of the second long crank is hinged to the first longitudinal lever assembly, and the second end is hinged to the end of the connecting rod fixed to the second cylinder; a first connecting rod extending in the Y direction is hinged between the second end of the first long crank and the second end of the second long crank. The first end of the third long crank is hinged to the second longitudinal lever assembly, and the second end of the second crank is hinged to the second piston rod of the second cylinder; the third end of the short crank is hinged to the second longitudinal lever assembly, and the fourth end of the short crank is hinged to the second end of the third long crank with a second connecting rod extending in the Y direction.

2. The glass longitudinal breaking device according to claim 1, characterized in that, The base is also provided with multiple support components for supporting the first longitudinal flex wheel assembly or the second longitudinal flex wheel assembly.

3. The glass longitudinal breaking device according to claim 1, characterized in that, The diameter of the first cylinder is larger than that of the second cylinder.

4. The glass longitudinal breaking device according to claim 1, characterized in that, The length of the first longitudinal bend wheel assembly is less than the length of the second longitudinal bend wheel assembly.

5. The glass longitudinal breaking device according to claim 1, characterized in that, The rotation axes of both the first and second top wheels are parallel to the X direction.

6. The glass longitudinal breaking device according to claim 1, characterized in that, The base is also equipped with multiple roller assemblies for conveying glass plates along the Y direction, and the longitudinal bending assembly is disposed between two adjacent roller assemblies.

7. The glass longitudinal breaking device according to claim 1, characterized in that, It also includes a control system, which comprises a compressed air source, a two-position three-way solenoid valve, a two-position five-way solenoid valve, and a controller. The two-position five-way solenoid valve includes a first air inlet, a first air outlet, and a second air outlet. The first air inlet is connected to the compressed air source, and the first and second air outlets are respectively connected to a first cylinder. The two-position three-way solenoid valve is normally open and includes a second air inlet and an air outlet. The second air inlet is connected to the compressed air source, and the air outlet is connected to a second cylinder through a quick exhaust valve. The controller is used to control the on / off state of the two-position three-way solenoid valve and the two-position five-way solenoid valve.

8. The glass longitudinal breaking device according to claim 7, characterized in that, The compressed air source is connected to the first air inlet and the second air inlet through an air source processing component.

9. The glass longitudinal breaking device according to claim 7, characterized in that, The first and second air outlets are each connected to the first cylinder via a one-way throttle valve.

10. A control method for the glass longitudinal breaking device as described in claim 7, characterized in that, Includes the following steps: S1. When the glass plate to be vertically bent reaches a certain position on the base, the control system determines whether the current vertical bending device is applicable based on the length of the glass plate. If applicable, it jumps to step S2; if not applicable, the vertical bending device does not work. S2. The control system selects to activate the first longitudinal bend wheel group alone or to activate the first longitudinal bend wheel group and the second longitudinal bend wheel group simultaneously according to the length of the glass plate. If the first longitudinal bend wheel group is activated alone, the process jumps to step S3. If the first longitudinal bend wheel group and the second longitudinal bend wheel group are activated simultaneously, the process jumps to step S4. S3. After a first time delay, the controller energizes the two-position three-way solenoid valve, the second cylinder rapidly exhausts air, and the second piston rod is in a free state within the second cylinder; after a second time delay, when the glass plate to be longitudinally bent reaches directly above the first longitudinal bending wheel assembly, the controller energizes the two-position five-way solenoid valve, the first piston rod extends, and the first longitudinal bending wheel assembly rises; after a third time delay, the controller simultaneously de-energizes the two-position three-way solenoid valve and the two-position five-way solenoid valve, the first piston rod and the second piston rod retract simultaneously, and the first longitudinal bending wheel assembly descends; the value of the second time delay is greater than the value of the first time delay; S4. After the fourth time delay, when the glass plate to be bent reaches directly above the first and second bending wheel sets, the controller energizes the two-position five-way solenoid valve, the first piston rod extends, and the first and second bending wheel sets rise simultaneously. After the fifth time delay, the controller de-energizes the two-position five-way solenoid valve, the first piston rod retracts, and the first and second bending wheel sets descend simultaneously.

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