A pipe cutting device for processing liquid crystal display screens

Abstract

The present invention discloses a pipe cutting device for processing liquid crystal display screens, which specifically relates to the field of pipe cutting technology, including a workbench, provided with a material receiving port, a material discharging port, a support plate, etc.; a feeding mechanism, which is multiple and has a fixed box on the outside, and has a clamping assembly on it for conveying pipes at a fixed distance; a limit assembly, which is multiple and installed on the third support plate, and has a rotating mechanism at one end for limit and positioning detection and coordinated cutting rotation; an electric clamp, which is multiple for clamping pipes; and a position sensor, which is multiple for detecting the cutting position to trigger the rotating mechanism. The device can automatically and accurately feed and cut, and can automatically rotate and adjust the cutting seam during cutting, and automatically unload materials, and can cut pipes of different lengths at one time, thereby improving cutting efficiency and accuracy, meeting the needs of pipes of different lengths for processing liquid crystal display screens, and improving processing efficiency and convenience.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe cutting, and more specifically, to a pipe cutting device for processing a liquid crystal display screen. Background Art

[0002] Liquid crystal display is a type of flat panel display. It is used for screen display of televisions and computers. The advantages of this display are low power consumption, small size and low radiation. Liquid crystal display is mainly composed of glass substrate, backlight module, FPC, microelectronic devices, color filter, electrode, drive circuit, internal frame, shell, support frame and other parts. The internal frame and support frame of the display are mostly made of many square tubes and round tubes. Therefore, when processing and manufacturing the internal frame and support frame of the display, it is necessary to use cutting equipment to cut various specifications of pipes into suitable lengths one by one, and then make these cut pipes into the internal frame and support frame of the display.

[0003] When the existing cutting equipment is in use, although it is possible to arrange multiple pipe fittings on the fixture at one time for simultaneous cutting, it is only possible to cut pipe fittings of the same size and length at the same time, and it is impossible to cut pipe fittings of different lengths at one time. In addition, when cutting, the automatic feeding accuracy of the pipe fittings is low, and when cutting, the pipe fittings are prone to tilting due to vibration, which reduces the cutting accuracy. In addition, during the cutting process, as the cutting depth on the pipe fitting increases, the wear on the tool increases, and the tool is prone to jamming and heat generation is rapid, which not only easily affects the flatness of the incision, but also easily damages the tool. Therefore, a pipe cutting device for processing liquid crystal display screens is proposed. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a tube cutting device for processing a liquid crystal display screen to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a tube cutting device for processing a liquid crystal display screen, comprising:

[0006] A workbench, wherein a material receiving port is provided on the workbench, a material discharging port is connected to the bottom end of the material receiving port, a first support plate is provided on one side of the material receiving port, a support frame is connected to one side of the first support plate, a second support plate is provided on one side of the support frame, a third support plate is provided on the other side of the material receiving port, and a cutting assembly is provided on one side of the top end of the first support plate;

[0007] A feeding mechanism, wherein a plurality of feeding mechanisms are provided, a fixed box is provided on the outside of each feeding mechanism, each fixed box is installed between the first support plate and the support frame, and a clamping assembly is installed on each feeding mechanism, and the feeding mechanism is used to transport the pipes clamped by the clamping assembly at a fixed distance;

[0008] A limit assembly, wherein a plurality of limit assemblies are provided, and the plurality of limit assemblies are all mounted on the third support plate, and a rotating mechanism is mounted on one end of each limit assembly, and the limit assembly is used to limit the position of pipes of different lengths to be cut, and the rotating mechanism is used to position and detect the pipes, and to rotate when the pipes are cut in cooperation with the cutting assembly;

[0009] Electric grippers, wherein a plurality of the electric grippers are provided and installed on one side of the first support plate, and the electric grippers are used to clamp the pipes transported at a fixed distance and cooperate with the rotating mechanism to support the pipes at both ends;

[0010] Position sensor, there are multiple position sensors, multiple position sensors are installed on the first support plate, each position sensor is used to detect the cutting position of the cutting assembly, triggering the rotating mechanism to perform rotational cutting on the pipe.

[0011] Preferably, the cutting assembly includes a hydraulic lifting rod, a top box, a driving motor and a cutting knife. Two hydraulic lifting rods are provided. The two hydraulic lifting rods are installed on a workbench. The top ends of the two hydraulic lifting rods jointly support a top box. A driving motor is installed in the top box. A cutting knife is installed on the output shaft of the driving motor.

[0012] Preferably, the first support plate is provided with a plurality of second through holes, the second support plate is provided with a plurality of first through holes, and an electric clamp is provided on the outer side of each second through hole.

[0013] Preferably, the feeding mechanism includes a screw, a first guide rod, a slider, a follower wheel, a first motor, a driving wheel and a synchronous belt. The screw is installed in a fixed box, and first guide rods are provided on both sides of the screw. The slider is sleeved on the screw and slidably cooperates with the two first guide rods. A follower wheel is installed at one end of the conveying screw, the first motor is installed on the outside of the fixed box, and a driving wheel is installed on the output shaft of the first motor. A synchronous belt is connected between the driving wheel and the follower wheel.

[0014] Preferably, the clamping assembly includes a support, a second motor, a double-threaded screw, a second guide rod and a movable clamp. Two supports are provided, and both supports are installed on a slider. The second motor is installed on the outside of one support, and the output end of the second motor is connected to a double-threaded screw rotatably connected to the two supports. Second guide rods are provided on both sides of the double-threaded screw. Two movable clamps slidably connected to the second guide rod are symmetrically installed on the double-threaded screw, and the two movable clamps cooperate to form a diamond structure.

[0015] Preferably, the limiting assembly comprises a hydraulic pump, a hydraulic rod and a connecting frame, the hydraulic pump is mounted on the third support plate, the hydraulic pump is connected to the hydraulic rod, a connecting frame is mounted on the end of the hydraulic rod, and a rotating mechanism is mounted on the connecting frame.

[0016] Preferably, the rotating mechanism includes a third motor, a turntable, a pressure sensor and a positioning assembly. The third motor is mounted on a connecting frame, a turntable is mounted on the output end of the third motor, a pressure sensor is mounted in the middle of the turntable, and positioning assemblies are arranged on both sides of the pressure sensor.

[0017] Preferably, the pressure sensor is coaxially arranged with the corresponding first through hole and second through hole respectively.

[0018] Preferably, the positioning assembly comprises an electric push rod and a push block, the push block is installed at the telescopic end of the electric push rod, and the push block is in a V-shaped structure.

[0019] Preferably, a plurality of rollers are installed on the inner side of the gripping head of the electric gripper, and a plurality of annular anti-slip grooves are provided on each of the rollers.

[0020] Technical effects and advantages of the present invention:

[0021] 1. The feeding mechanism is driven by the first motor to realize fixed-distance conveying of pipe fittings through structures such as screw rods and sliders. With the automatic clamping and centering functions of the clamping assembly, the feeding and conveying length of the pipe fittings can be accurately controlled. The electric clamp clamps the pipe fittings when the clamping assembly is reset to prevent the pipe fittings from retreating, thereby improving the feeding accuracy. The limit assembly uses a hydraulic pump and a hydraulic rod to adjust the position of the rotating mechanism, and detects the end position of the pipe fitting through a pressure sensor, which can compensate for the pipe fittings that are not delivered in place, further improving the feeding accuracy.

[0022] 2. The cutting knife is raised and lowered by the hydraulic lifting rod of the cutting assembly, and the driving motor drives the cutting knife to rotate. Multiple pipes can be cut at one time. During the cutting process, the position sensor triggers the rotating mechanism to drive the pipe to rotate, so that the pipe cooperates with the cutting during rotation, avoiding knife clamping, improving cutting efficiency and the flatness of the pipe cut.

[0023] 3. The third motor of the rotating mechanism drives the turntable to rotate, so that the pipe rotates in coordination during cutting, reducing the depth of the cutting knife entering the cutting seam, avoiding knife jamming, and improving cutting efficiency and cut flatness. The V-shaped push block of the positioning component can automatically center the end of the pipe fitting to ensure that the pipe fitting is horizontally stressed and avoid the cut being torn apart due to gravity. The roller and annular anti-skid groove on the inner side of the electric gripping head can ensure the rotation of the pipe fitting while preventing it from moving forward and backward, thereby improving cutting accuracy.

[0024] 4. After cutting, the hydraulic rod retracts to increase the size of the cutting seam to avoid continuous friction between the end of the pipe and the cutting knife. The hydraulic rod retracts and resets to cooperate with the positioning component to separate the pipe clamping, realizing automatic unloading and improving the convenience of unloading.

[0025] 5. It can cut pipes of different lengths at one time. The position of the rotating mechanism can be adjusted through the limit assembly according to the needs to achieve accurate cutting of pipes of different lengths, improve the production efficiency of pipes of different lengths used in LCD display processing, and improve processing convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 It is a side view stereoscopic structural schematic diagram of the present invention.

[0028] Figure 3 It is a schematic diagram of the connection structure between the first support plate and the support frame of the present invention.

[0029] Figure 4 It is a structural schematic diagram of the feeding mechanism of the present invention.

[0030] Figure 5 It is a schematic structural diagram of the clamping assembly of the present invention.

[0031] Figure 6 It is a schematic diagram of the connection structure between the limiting mechanism and the third supporting plate of the present invention.

[0032] Figure 7 It is a structural schematic diagram of the limiting mechanism of the present invention.

[0033] Figure 8 It is a structural schematic diagram of the rotating mechanism of the present invention.

[0034] Fig. 9 It is a schematic diagram of the structure of the electric clamp of the present invention.

[0035] The accompanying drawings are marked as follows: 1, workbench; 2, material receiving port; 3, material discharging port; 4, first support plate; 5, support frame; 6, second support plate; 7, feeding mechanism; 701, screw rod; 702, first guide rod; 703, slider; 704, follower wheel; 705, first motor; 706, driving wheel; 707, synchronous belt; 8, cutting assembly; 9, third support plate; 10, limit assembly; 1001, hydraulic pump; 1002, hydraulic rod; 1003, connecting frame; 11. Rotating mechanism; 1101. Third motor; 1102. Turntable; 1103. Pressure sensor; 1104. Positioning assembly; 12. Electric clamp; 13. Position sensor; 14. Fixed box; 15. Clamping assembly; 1501. Support; 1502. Second motor; 1503. Double-threaded screw; 1504. Second guide rod; 1505. Mobile clamp; 16. Roller; 17. Anti-skid groove; 18. First through hole; 19. Second through hole. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] As attached Figure 1-9 A tube cutting device for processing a liquid crystal display screen is shown, comprising:

[0038] A workbench 1, wherein the workbench 1 is provided with a material receiving port 2, the bottom end of the material receiving port 2 is connected to a material discharging port 3, a first support plate 4 is provided on one side of the material receiving port 2, a support frame 5 is connected to one side of the first support plate 4, a second support plate 6 is provided on one side of the support frame 5, a third support plate 9 is provided on the other side of the material receiving port 2, and a cutting assembly 8 is provided on one side of the top end of the first support plate 4;

[0039] A feeding mechanism 7, wherein a plurality of feeding mechanisms 7 are provided, and a fixed box 14 is provided on the outside of each feeding mechanism 7, and each fixed box 14 is installed between the first support plate 4 and the support frame 5, and a clamping assembly 15 is installed on each feeding mechanism 7, and the feeding mechanism 7 is used to transport the pipes clamped by the clamping assembly 15 at a fixed distance;

[0040] A limit assembly 10, wherein a plurality of limit assemblies 10 are provided, and the plurality of limit assemblies 10 are all mounted on the third support plate 9, and a rotating mechanism 11 is mounted on one end of each limit assembly 10, and the limit assembly 10 is used to limit the position of pipes of different lengths to be cut as required, and the rotating mechanism 11 is used to perform positioning detection on the pipes, and to rotate when cooperating with the cutting assembly 8 to cut the pipes;

[0041] An electric gripper 12, wherein a plurality of the electric grippers 12 are provided and are installed on one side of the first support plate 4, and the electric gripper 12 is used to clamp the pipes transported at a fixed distance and cooperate with the rotating mechanism 11 to support the pipes at both ends;

[0042] The position sensor 13 is provided in plurality and is mounted on the first support plate 4. Each position sensor 13 is used to detect the position cut by the cutting assembly 8 and trigger the rotating mechanism 11 to perform rotational cutting on the pipe.

[0043] In the specific implementation, first, each required pipe is passed through the first through hole 18 opened by the second support plate 6 in sequence, and then inserted into the second through hole 19 opened on the first support plate 4 and blocked by each electric gripper 12 for initial positioning. After positioning, each electric gripper 12 is opened, and then each clamping assembly 15 clamps the corresponding pipe respectively, and cooperates with the feeding mechanism 7 to perform fixed-distance feeding. During each fixed-distance feeding, before the clamping assembly 15 is released, each electric gripper 12 clamps the pipe to avoid the situation in which friction on the pipe is generated during the resetting process of the clamping assembly 15 due to the excessively fast resetting speed and the moving gripper 1505 is opened, resulting in the backward movement, thereby improving the accuracy of the pipe feeding and conveying distance.

[0044] After each pipe is fed to the required length, each limit assembly 10 operates, so that each rotating mechanism 11 moves to the end of the pipe, detects the feeding position of the pipe, and avoids errors in the feeding length. When an error occurs, the clamping assembly 15 cooperates with the feeding mechanism 7 to compensate for the feeding, and performs positioning detection through the pressure sensor 1103 in the rotating mechanism 11, thereby further improving the accuracy of the feeding length. After the feeding is completed, the rotating mechanism 11 cooperates with the electric clamp 12 to clamp and fix the pipe;

[0045] Then, the cutting assembly 8 descends to cut each pipe fitting. During the process of the cutting assembly 8 descending and cutting, each position sensor 13 detects the descending position of the cutting knife, thereby triggering the corresponding rotating mechanism 11 to rotate the pipe fitting, so that the pipe fitting cooperates with the cutting of the cutting knife during rotation, avoiding the cutting knife from penetrating into the cutting seam and causing the knife to be clamped, thereby improving the cutting efficiency and avoiding damage to the cutting knife, and improving the flatness of the pipe fitting incision. After each pipe fitting is cut, when the cutting knife descends to the detection position of the lower position sensor 13, the corresponding upper limit assembly 10 retracts appropriately to increase the size of the cutting seam and avoid continuous friction, thereby The cutting knife can cut more smoothly. After the cutting of each pipe fitting is completed, the cutting component 8 is reset, the rotating mechanism 11 releases the cut pipe fitting, and each limit component 10 is reset, so that the cut pipe fittings of different lengths automatically fall to the receiving port 2 and are discharged from the discharging port 3. In this way, cyclic feeding and cutting are carried out to realize automatic and precise feeding and automatic cutting. During the cutting process, it can automatically cooperate with the rotation and adjustment of the cutting seam, as well as automatic unloading, so that the required pipe fittings of different lengths can be cut at one time, thereby improving the cutting efficiency and accuracy, facilitating the guarantee of the demand for pipe fittings of different lengths for processing liquid crystal display screens, and improving the efficiency and convenience of processing liquid crystal display screens.

[0046] The cutting assembly 8 includes a hydraulic lifting rod, a top box, a driving motor and a cutting knife. There are two hydraulic lifting rods, which are installed on the workbench 1. The top ends of the two hydraulic lifting rods jointly support a top box. A driving motor is installed in the top box, and a cutting knife is installed on the output shaft of the driving motor.

[0047] During specific implementation, the top box can be raised and lowered by extending and retracting the hydraulic lifting rod, thereby controlling the descent height of the cutting knife. When cutting the pipe fittings, the drive motor is operated to rotate the cutting knife. As the hydraulic lifting rod controls the cutting knife to descend, each positioned and fixed pipe fitting can be cut, thereby facilitating the cutting of multiple pipe fittings at one time and improving the efficiency of pipe cutting.

[0048] The first support plate 4 is provided with a plurality of second through holes 19 , the second support plate 6 is provided with a plurality of first through holes 18 , and an electric gripper 12 is provided on the outer side of each second through hole 19 .

[0049] In specific implementation, the opening of each of the first through holes 18 facilitates the support of the pipe fittings, and at the same time cooperates with the opening of the second through holes 19 to make each pipe fitting in a parallel state, so that the electric clamp 12, the rotating mechanism 11 and the clamping assembly 15 can center and clamp the pipe fittings.

[0050] The feeding mechanism 7 includes a screw rod 701, a first guide rod 702, a slider 703, a follower wheel 704, a first motor 705, a driving wheel 706 and a synchronous belt 707. The screw rod 701 is installed in a fixed box 14. First guide rods 702 are provided on both sides of the screw rod 701. The slider 703 is sleeved on the screw rod 701 and slidably cooperates with the two first guide rods 702. A follower wheel 704 is installed at one end of the conveying screw rod 701. The first motor 705 is installed on the outside of the fixed box 14. A driving wheel 706 is installed on the output shaft of the first motor 705. A synchronous belt 707 is connected between the driving wheel 706 and the follower wheel 704.

[0051] During specific implementation, the first motor 705 is operated so that the synchronous belt 707 drives the follower wheel 704 to rotate, thereby causing the screw rod 701 to rotate, so that the slider 703 can move back and forth along the first guide rod 702, and the clamping assembly 15 installed on the slider 703 can move along with it. Therefore, when loading, the slider 703 drives the pipe clamped by the clamping assembly 15 to move, and the pipe can be transported at a fixed distance. By controlling the moving distance of the clamping assembly 15, the loading and conveying length of the pipe is determined.

[0052] The clamping assembly 15 includes a support 1501, a second motor 1502, a double-threaded screw 1503, a second guide rod 1504 and a mobile clamp 1505. Two supports 1501 are provided, and the two supports 1501 are both installed on the slider 703. The second motor 1502 is installed on the outside of one support 1501, and the output end of the second motor 1502 is connected to a double-threaded screw 1503 rotatably connected to the two supports 1501. Second guide rods 1504 are provided on both sides of the double-threaded screw 1503. Two mobile clamps 1505 slidably connected to the second guide rod 1504 are symmetrically installed on the double-threaded screw 1503, and the two mobile clamps 1505 cooperate to form a diamond structure.

[0053] During specific implementation, the second motor 1502 is operated to cause the double-threaded screw 1503 to rotate, so that the two mobile clamps 1505 are moved closer to or farther away from each other along the second guide rod 1504. When the two mobile clamps 1505 are close to each other, the pipe fitting can be clamped and centered due to the structure of the mobile clamps 1505, thereby achieving automatic clamping and centering, so that the pipe fitting can be coaxial with the first through hole 18 and the second through hole 19. When the two mobile clamps 1505 are moved away from each other, the pipe fitting can be loosened.

[0054] The limiting assembly 10 includes a hydraulic pump 1001, a hydraulic rod 1002 and a connecting frame 1003. The hydraulic pump 1001 is installed on the third support plate 9. The hydraulic pump 1001 is connected to the hydraulic rod 1002. The connecting frame 1003 is installed at the end of the hydraulic rod 1002. The connecting frame 1003 is installed on the rotating mechanism 11.

[0055] During specific implementation, the hydraulic pump 1001 is operated to make the hydraulic rod 1002 extend and retract, so that the position of the rotating mechanism 11 can be adjusted, so that the pressure sensor 1103 moves with it, so that it can move and cooperate according to the required cutting length of the pipe. The pressure sensor 1103 squeezes the end of the pipe to detect whether the pipe is delivered in place, thereby detecting the accuracy of the pipe delivery, so as to facilitate the cooperation of the feeding mechanism 7 and the clamping assembly 15 to compensate for the pipe that is not delivered in place, thereby improving the cutting accuracy of the pipe. After the pipe is cut, the hydraulic rod 1002 retracts a certain distance, which can increase the cutting seam of the pipe and avoid continuous friction between the end of the pipe after cutting and separation and the blade of the cutting knife. The hydraulic rod 1002 retracts and resets to cooperate with the positioning assembly 1104 to clamp and separate the pipe, so that automatic unloading can be carried out, thereby improving the convenience of unloading.

[0056] The rotating mechanism 11 includes a third motor 1101, a turntable 1102, a pressure sensor 1103 and a positioning assembly 1104. The third motor 1101 is installed on the connecting frame 1003. The turntable 1102 is installed at the output end of the third motor 1101. The pressure sensor 1103 is installed in the middle of the turntable 1102. Positioning assemblies 1104 are arranged on both sides of the pressure sensor 1103.

[0057] During specific implementation, the corresponding position sensor 13 detects the position of the cutting knife's descent, which can trigger the third motor 1101 to drive the turntable 1102 to rotate, so that the pipe clamped by the two positioning components 1104 can rotate with the cooperation of the roller 16, so that the pipe can cooperate with the rotation during the cutting process, thereby improving the cutting efficiency. At the same time, the depth of the cutting seam that the cutting knife enters can be reduced to avoid the occurrence of knife jamming. At the same time, the flatness of the pipe incision can be improved.

[0058] The pressure sensor 1103 is coaxially arranged with the corresponding first through hole 18 and second through hole 19 respectively.

[0059] The positioning assembly 1104 includes an electric push rod and a push block. The push block is installed at the telescopic end of the electric push rod, and the push block is in a V-shaped structure.

[0060] During specific implementation, the two electric push rods are telescopically coordinated to enable the two push blocks to move closer to or farther away from each other, thereby clamping and separating the ends of the pipe fittings. The push blocks have a V-shaped structure, which can automatically center the ends of the pipe fittings to avoid the pipe fittings from extending too long and bending downward, thereby ensuring that the pipe fittings are in a horizontally stressed state when being cut, avoiding the incisions from being automatically torn due to the pipe fittings' own gravity, thereby ensuring the smoothness of the pipe fitting incisions.

[0061] A plurality of rollers 16 are installed on the inner side of the gripping head of the electric gripper 12 , and a plurality of annular anti-slip grooves 17 are formed on each of the rollers 16 .

[0062] During specific implementation, the setting of each roller 16 ensures that the pipe can still rotate in cooperation with the rotating mechanism 11 and be cut in cooperation with the cutting assembly 8 when the electric clamp 12 clamps the pipe. The opening of the annular anti-slip groove 17 can prevent the pipe clamped by the electric clamp 12 from moving forward and backward while ensuring the accuracy of positioning, thereby improving the cutting accuracy.

[0063] Finally, a few points should be explained: First, in the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0064] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0065] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tube cutting device for processing liquid crystal display screens, characterized in that: include: A workbench (1), wherein the workbench (1) is provided with a material receiving port (2), the bottom end of the material receiving port (2) is connected to a material discharging port (3), a first support plate (4) is provided on one side of the material receiving port (2), a support frame (5) is connected on one side of the first support plate (4), a second support plate (6) is provided on one side of the support frame (5), a third support plate (9) is provided on the other side of the material receiving port (2), and a cutting assembly (8) is provided on one side of the top end of the first support plate (4); A feeding mechanism (7), wherein a plurality of the feeding mechanisms (7) are provided, a fixed box (14) is provided on the outside of each of the feeding mechanisms (7), each of the fixed boxes (14) is installed between the first support plate (4) and the support frame (5), and a clamping assembly (15) is installed on each of the feeding mechanisms (7), and the feeding mechanism (7) is used to transport the pipes clamped by the clamping assembly (15) at a fixed distance; A limit assembly (10), wherein a plurality of limit assemblies (10) are provided, and the plurality of limit assemblies (10) are all mounted on the third support plate (9), and a rotating mechanism (11) is mounted on one end of each limit assembly (10), wherein the limit assembly (10) is used to limit the position of pipes of different lengths to be cut, and the rotating mechanism (11) is used to perform positioning detection on the pipes, and to rotate when cooperating with the cutting assembly (8) to cut the pipes; An electric gripper (12), wherein a plurality of the electric grippers (12) are provided, and the plurality of electric grippers (12) are installed on one side of the first support plate (4), and the electric grippers (12) are used to clamp the pipes transported at a fixed distance and cooperate with the rotating mechanism (11) to support the pipes at both ends; A position sensor (13), wherein a plurality of the position sensors (13) are provided, and the plurality of the position sensors (13) are mounted on the first support plate (4), and each of the position sensors (13) is used to detect the position cut by the cutting assembly (8), and trigger the rotating mechanism (11) to perform rotational cutting on the pipe.

2. A tube cutting device for processing a liquid crystal display screen according to claim 1, characterized in that: The cutting assembly (8) comprises a hydraulic lifting rod, a top box, a driving motor and a cutting knife, wherein two hydraulic lifting rods are provided and the two hydraulic lifting rods are mounted on a workbench (1), the top ends of the two hydraulic lifting rods jointly support a top box, a driving motor is mounted in the top box, and a cutting knife is mounted on an output shaft of the driving motor.

3. A tube cutting device for processing a liquid crystal display screen according to claim 2, characterized in that: The first support plate (4) is provided with a plurality of second through holes (19), the second support plate (6) is provided with a plurality of first through holes (18), and an electric gripper (12) is provided on the outer side of each second through hole (19).

4. A tube cutting device for processing a liquid crystal display screen according to claim 3, characterized in that: The feeding mechanism (7) comprises a screw rod (701), a first guide rod (702), a slider (703), a follower wheel (704), a first motor (705), a driving wheel (706) and a synchronous belt (707); the screw rod (701) is mounted in a fixed box (14); first guide rods (702) are arranged on both sides of the screw rod (701); the slider (703) is sleeved on the screw rod (701) and slidably cooperates with the two first guide rods (702); a follower wheel (704) is mounted on one end of the screw rod (701); the first motor (705) is mounted outside the fixed box (14); a driving wheel (706) is mounted on the output shaft of the first motor (705); and a synchronous belt (707) is connected between the driving wheel (706) and the follower wheel (704).

5. The tube cutting device for processing a liquid crystal display screen according to claim 4, characterized in that: The clamping assembly (15) comprises a support (1501), a second motor (1502), a double-threaded screw (1503), a second guide rod (1504) and a movable clamp (1505); two supports (1501) are provided, and the two supports (1501) are both mounted on a slider (703); the second motor (1502) is mounted on the outside of one support (1501), and the output end of the second motor (1502) is connected to a double-threaded screw (1503) rotatably connected to the two supports (1501); second guide rods (1504) are provided on both sides of the double-threaded screw (1503); two movable clamps (1505) slidably connected to the second guide rod (1504) are symmetrically mounted on the double-threaded screw (1503); the two movable clamps (1505) cooperate to form a rhombus structure.

6. A tube cutting device for processing a liquid crystal display screen according to claim 5, characterized in that: The limit assembly (10) comprises a hydraulic pump (1001), a hydraulic rod (1002) and a connecting frame (1003); the hydraulic pump (1001) is mounted on the third support plate (9); the hydraulic pump (1001) is connected to the hydraulic rod (1002); the connecting frame (1003) is mounted on the end of the hydraulic rod (1002); and the rotating mechanism (11) is mounted on the connecting frame (1003).

7. A tube cutting device for processing a liquid crystal display screen according to claim 6, characterized in that: The rotating mechanism (11) comprises a third motor (1101), a rotating disk (1102), a pressure sensor (1103) and a positioning assembly (1104); the third motor (1101) is mounted on a connecting frame (1003); a rotating disk (1102) is mounted on an output end of the third motor (1101); a pressure sensor (1103) is mounted in the middle of the rotating disk (1102); and positioning assemblies (1104) are arranged on both sides of the pressure sensor (1103).

8. The tube cutting device for processing a liquid crystal display screen according to claim 7, characterized in that: The pressure sensor (1103) is coaxially arranged with the corresponding first through hole (18) and second through hole (19).

9. The tube cutting device for processing a liquid crystal display screen according to claim 8, characterized in that: The positioning assembly (1104) comprises an electric push rod and a push block, the push block being mounted on the telescopic end of the electric push rod, and the push block being in a V-shaped structure.

10. A tube cutting device for processing a liquid crystal display screen according to claim 9, characterized in that: A plurality of rollers (16) are installed on the inner side of the gripping head of the electric gripper (12), and a plurality of annular anti-slip grooves (17) are provided on each of the rollers (16).

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