An LCD liquid crystal display screen laser cutting device

Abstract

The application belongs to the technical field of laser cutting, and particularly relates to a laser cutting device for LCD liquid crystal display screens, which comprises a base, a rack, a vacuum clamp and a laser generator, the rack is fixedly arranged on the top of the base, a gas cylinder is fixedly arranged on the top of the rack, a moving cover is fixedly arranged on the moving end of the gas cylinder, a moving assembly is arranged in the moving cover, the laser generator is arranged on the bottom of the moving assembly, and the vacuum clamp is fixedly arranged on the top of the base. Through the cooperation of the auxiliary nitrogen blowing mechanism and the gas suction temperature detection mechanism, the nitrogen flow is accurately controlled, and the product yield is improved. Meanwhile, the smoke filtering mechanism is combined with the ladder type intelligent control to efficiently purify the smoke and ensure the safety of the working environment. In addition, the auxiliary nitrogen blowing mechanism and the gas suction temperature detection mechanism rotate to optimize the blowing and suction effect and comprehensively improve the cutting quality and efficiency.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of laser cutting, and particularly relates to an LCD liquid crystal display screen laser cutting device. BACKGROUND

[0002] With the wide application of LCD liquid crystal display screens in the field of electronic equipment, the fine requirement of the manufacturing process of the LCD liquid crystal display screens is continuously improved. Laser cutting technology has become one of the key technologies for cutting and processing of the LCD liquid crystal display screens due to the advantages of high precision and non-contact, and therefore, the laser cutting device is widely used. For example, the LCD liquid crystal display screen laser cutting device is disclosed in the announcement No. CN118060742A.

[0003] At present, in order to improve the cutting quality, nitrogen is generally used as an auxiliary gas in the industry to inhibit oxidation and reduce slag residue by using the inert gas characteristics. However, the structure and material of different regions of the LCD liquid crystal display screen are different, and the temperature distribution generated in the laser cutting process is uneven. The traditional cutting device lacks real-time monitoring and precise control mechanism for temperature change, and it is difficult to dynamically match the nitrogen supply. Excessive nitrogen will cause local rapid cooling of the cutting area, generate thermal stress, cause glass fragmentation or damage to the liquid crystal layer, and insufficient nitrogen will not effectively inhibit oxidation, resulting in rough cutting edges and burrs, which seriously affects the product yield. In addition, the auxiliary gas injection direction of the conventional laser cutting device is fixed and single, and it is difficult to fully cover the cutting area of complex shape. The gas cannot fully act on the cutting front, and the molten material and heat cannot be timely discharged, resulting in low cutting efficiency and unstable quality.

[0004] Therefore, the LCD liquid crystal display screen laser cutting device is provided. SUMMARY

[0005] The purpose of the application is to provide an LCD liquid crystal display screen laser cutting device to solve the above problems.

[0006] To achieve the above purpose, the following technical scheme is adopted: an LCD liquid crystal display screen laser cutting device, comprising a base, a rack, a vacuum clamp and a laser generator, the rack is fixedly arranged on the top of the base, a gas cylinder is fixedly arranged on the top of the rack, a moving cover is fixedly arranged on the moving end of the gas cylinder, a moving assembly is arranged in the moving cover, the laser generator is arranged on the bottom of the moving assembly, and the vacuum clamp is fixedly arranged on the top of the base.

[0007] A rotating mechanism is arranged on the outer wall of the laser generator, and the rotating mechanism can be forward and reverse rotated.

[0008] An auxiliary nitrogen blowing mechanism is arranged at the bottom of the rotating mechanism and located at one side of the laser generator.

[0009] A gas suction temperature detection mechanism is arranged at the bottom of the rotating mechanism and located at the other side of the laser generator.

[0010] A smoke filtering mechanism is arranged inside the gas suction temperature detection mechanism.

[0011] A cleaning mechanism is arranged on the lower end outer wall of the laser generator and used for cleaning the detection components of the gas suction temperature detection mechanism.

[0012] A PLC controller is arranged on the side wall of the rack, and the vacuum clamp, the laser generator, the air cylinder, the rotating mechanism, the auxiliary nitrogen blowing mechanism and the smoke filtering mechanism are electrically connected with the PLC controller.

[0013] Preferably, the rotating mechanism comprises a fixed cover fixedly arranged on the outer wall of the laser generator, the inside of the fixed cover is provided with a large gear, the inner wall of the large gear is rotationally connected with the outer wall of the laser generator through a bearing, the top inner wall of the fixed cover is fixedly provided with a motor, the output shaft of the motor is fixedly provided with a small gear, and the small gear is arranged in meshing with the large gear.

[0014] Preferably, one side of the upper surface of the large gear is fixedly provided with an infrared emitter, one side of the inner wall of the fixed cover is fixedly provided with an infrared receiver, and the infrared receiver is arranged in position correspondence with the infrared emitter.

[0015] Preferably, the auxiliary nitrogen blowing mechanism comprises a fixed rod fixedly arranged at one side of the lower surface of the large gear, the lower end of the fixed rod is fixedly provided with a nitrogen blowing pipe in an inclined manner, the pipe wall of the nitrogen blowing pipe is fixedly provided with a first electromagnetic valve, and one end of the nitrogen blowing pipe is connected with an external nitrogen storage device through a conduit.

[0016] Preferably, the gas suction temperature detection mechanism comprises a box body fixedly arranged at the other side of the lower surface of the large gear, the bottom of the box body is fixedly provided with a gas suction pipe, and the side wall of the box body is fixedly provided with a suction fan, the gas suction pipe is a curved pipe, and the lower end of the gas suction pipe is detachably provided with a temperature sensor.

[0017] Preferably, the opening of the gas suction pipe is provided with a mounting sleeve, connecting rods are fixedly arranged between the two sides of the mounting sleeve and the inner wall of the lower end of the gas suction pipe, the temperature sensor is threadedly connected with the mounting sleeve, and the detection end of the temperature sensor extends to the outside of the gas suction pipe.

[0018] Preferably, the smoke filtering mechanism comprises an activated carbon filter screen fixedly arranged in the interior of the box body, the upper end of the gas suction pipe extends to the interior of the box body and is fixedly provided with a plurality of branch pipes, the plurality of branch pipes are arranged on one side of the activated carbon filter screen, and the pipe walls of the plurality of branch pipes are provided with second electromagnetic valves.

[0019] Preferably, the cleaning mechanism comprises a fixed ring sleeved on the outer wall of the lower end of the laser generator, the side wall of the fixed ring is provided with a bolt threadedly connected with the side wall of the laser generator, the side wall of the fixed ring is fixedly provided with a high-temperature-resistant sponge brush, and the high-temperature-resistant sponge brush can be in contact with the detection end of the temperature sensor.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] 1. By means of the auxiliary nitrogen blowing-out mechanism and the gas suction temperature detection mechanism, the cooperation of the nitrogen blowing-out pipe and the gas suction pipe, the nitrogen blowing-out pipe blows nitrogen towards the cutting area, improves the cutting quality, at the same time, the gas suction pipe can suck the gas in the cutting area, so that the gas passes through the temperature sensor to monitor the temperature of the cutting area in real time, and transmits the data to the PLC controller, and the opening and closing degree of the first electromagnetic valve core is accurately adjusted according to the temperature change, so as to realize dynamic and fine control of the nitrogen flow, effectively avoid the heat stress damage caused by excessive nitrogen, and the rough cutting edge, burr and other problems caused by insufficient nitrogen, and greatly improve the product yield.

[0022] 2. By means of the smoke filtering mechanism, the physical adsorption and chemical adsorption principle of the activated carbon filter screen are used to effectively purify the smoke generated in cutting, at the same time, the step-type intelligent control strategy constructed by the PLC controller is used to dynamically adjust the number of branch pipes according to the temperature change, combined with the adjustment of the suction fan rotating speed, to realize efficient interception and purification of high-concentration smoke and ensure the safety of the cutting operation environment.

[0023] 3. By means of the rotating mechanism, the auxiliary nitrogen blowing-out mechanism and the gas suction temperature detection mechanism can be rotated synchronously, the rotating blowing makes the nitrogen uniformly and comprehensively cover the cutting area, inhibits the oxidation reaction, carries away the slag and heat, and ensures the quality of the cutting surface; the rotating suction expands the smoke capture range, improves the temperature detection accuracy, and ensures stable and efficient gas suction process; at the same time, with the rotation of the gas suction temperature detection mechanism, the activated carbon filter screen will produce centrifugal motion, which can accelerate the contact speed and frequency of the smoke and the activated carbon, and improve the adsorption efficiency of harmful substances in the smoke.

[0024] 4. By setting the smoke filtering mechanism, the temperature sensor is in dynamic contact with the high-temperature-resistant sponge brush of the smoke filtering mechanism during the rotation of the gas suction temperature detection mechanism, which automatically wipes the detection end, removes the attached impurities, avoids the interference of impurities with temperature signal collection, ensures that the temperature sensor always maintains high-precision detection performance, and provides reliable basis for accurate regulation of the cutting process. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a perspective view of the laser cutting device for LCD liquid crystal display screen provided by the present application from an oblique top view;

[0026] Figure 2 is a perspective view of the laser cutting device for LCD liquid crystal display screen provided by the present application from an oblique bottom view;

[0027] Figure 3 is a perspective view of the laser generator surrounding components of the laser cutting device for LCD liquid crystal display screen provided by the present application;

[0028] Figure 4 is a perspective view of the rotating mechanism of the laser cutting device for LCD liquid crystal display screen provided by the present application;

[0029] Figure 5 is a perspective view of the gas suction temperature detection mechanism and the smoke filtering mechanism of the laser cutting device for LCD liquid crystal display screen provided by the present application;

[0030] Figure 6 is a partial perspective view of the end of the gas suction pipe of the laser cutting device for LCD liquid crystal display screen provided by the present application;

[0031] Figure 7 is a perspective view of the cleaning mechanism of the laser cutting device for LCD liquid crystal display screen provided by the present application.

[0032] In the figure: 1 base, 2 rack, 3 vacuum clamp, 4 laser generator, 5 air cylinder, 6 moving cover, 7 moving assembly, 8 rotating mechanism, 81 fixed cover, 82 large gear, 83 motor, 84 small gear, 85 infrared emitter, 86 infrared receiver, 9 auxiliary nitrogen blowing mechanism, 91 fixed rod, 92 nitrogen blowing pipe, 93 first electromagnetic valve, 10 gas suction temperature detection mechanism, 101 box body, 102 gas suction pipe, 103 suction fan, 104 temperature sensor, 105 mounting sleeve, 106 connecting rod, 11 smoke filtering mechanism, 111 activated carbon filter screen, 112 branch pipe, 113 second electromagnetic valve, 12 cleaning mechanism, 121 fixed ring, 122 bolt, 123 high-temperature-resistant sponge brush, 13 PLC controller. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] like Figures 1-7 As shown, a laser cutting device for LCD liquid crystal display screens includes a base 1, a frame 2, a vacuum fixture 3 and a laser generator 4. The frame 2 is fixedly arranged on the top of the base 1. A cylinder 5 is fixedly provided on the top of the frame 2. A movable cover 6 is fixedly provided on the movable end of the cylinder 5. A movable assembly 7 is provided inside the movable cover 6. The laser generator 4 is provided at the bottom of the movable assembly 7. The movable assembly 7 adopts an electric slider assembly, and the movable assembly 7 includes an electric slider structure in the X-axis and Y-axis directions, which can adjust the position of the laser generator 4 in the X-axis and Y-axis directions, and then cooperates with the cylinder 5 to adjust the position of the laser generator 4 on the Z-axis. The vacuum fixture 3 is fixedly arranged on the top of the base 1, and also includes:

[0035] The rotating mechanism 8 is arranged on the outer wall of the laser generator 4, and the rotating mechanism 8 can rotate forward and reverse. The rotating mechanism 8 includes a fixed cover 81 fixedly arranged on the outer wall of the laser generator 4, a large gear 82 is provided inside the fixed cover 81, and the inner wall of the large gear 82 is rotatably connected to the outer wall of the laser generator 4 through a bearing, a motor 83 is fixedly provided on the top inner wall of the fixed cover 81, and a small gear 84 is fixedly provided on the output shaft of the motor 83. The small gear 84 is meshed with the large gear 82. The operation of the motor 83 can drive the small gear 84 to rotate, and the small gear 84 further drives the large gear 82 to rotate, so that the gear mounted on the surface of the large gear 82 can rotate. The auxiliary nitrogen blowing mechanism 9 on both sides of the surface rotates synchronously with the gas intake temperature detection mechanism 10; an infrared transmitter 85 is fixedly provided on one side of the upper surface of the large gear 82, and an infrared receiver 86 is fixedly provided on the inner wall of one side of the fixed cover 81, and the infrared receiver 86 is arranged in a corresponding position to the infrared transmitter 85. During the rotation of the large gear 82, the infrared transmitter 85 rotates synchronously therewith. When the infrared transmitter 85 rotates to align with the position of the infrared receiver 86 on the side wall of the fixed cover 81, the light beam emitted by the infrared transmitter 85 is just received by the infrared receiver 86, and the reverse rotation is performed by controlling the motor 83.

[0036] The auxiliary nitrogen blowing mechanism 9 is arranged at the bottom of the rotating mechanism 8 and is located at one side of the laser generator 4. The auxiliary nitrogen blowing mechanism 9 comprises a fixed rod 91 fixedly arranged at one side of the lower surface of the large gear 82. The lower end of the fixed rod 91 is fixedly arranged with a nitrogen blowing pipe 92. The pipe wall of the nitrogen blowing pipe 92 is fixedly arranged with a first electromagnetic valve 93. One end of the nitrogen blowing pipe 92 is connected with an external nitrogen storage device through a pipe. When the external nitrogen storage device is started, nitrogen is conveyed to the nitrogen blowing pipe 92 through the storage device, and is precisely sprayed to the cutting area of the LCD liquid crystal display, thereby improving the cutting quality.

[0037] The gas suction temperature detection mechanism 10 is arranged at the bottom of the rotating mechanism 8 and is located at the other side of the laser generator 4. The gas suction temperature detection mechanism 10 comprises a box body 101 fixedly arranged at the other side of the lower surface of the large gear 82. The bottom of the box body 101 is fixedly arranged with a gas suction pipe 102. The sidewall of the box body 101 is fixedly arranged with a suction fan 103. The gas suction pipe 102 adopts a curved pipe. The lower end of the gas suction pipe 102 is detachably arranged with a temperature sensor 104. The curved pipe is used to align the temperature sensor 104 with the cutting area. An installation sleeve 105 is arranged at the opening of the gas suction pipe 102. Connection rods 106 are fixedly arranged between the two sides of the installation sleeve 105 and the inner wall of the lower end of the gas suction pipe 102. The temperature sensor 104 is threadedly connected with the installation sleeve 105. The detection end of the temperature sensor 104 extends to the outside of the gas suction pipe 102. The installation of the temperature sensor 104 not only ensures that the temperature sensor 104 can detect the temperature of the gas, but also ensures that the gas can smoothly pass through the inside of the gas suction pipe 102. When the temperature sensor 104 needs to be disassembled and maintained, the staff rotates the temperature sensor 104 by hand, so that the temperature sensor 104 is disassembled and removed from the inside of the installation sleeve 105.

[0038] The smoke filtering mechanism 11 is arranged in the gas suction temperature detection mechanism 10. The smoke filtering mechanism 11 comprises an activated carbon filter screen 111 fixedly arranged in the box body 101. The upper end of the gas suction pipe 102 extends to the inside of the box body 101 and is fixedly arranged with a plurality of branch pipes 112. The plurality of branch pipes 112 are arranged on one side of the activated carbon filter screen 111. The pipe wall of the plurality of branch pipes 112 is arranged with a second electromagnetic valve 113. When the gas flows through the activated carbon filter screen 111 arranged in the box body 101, the activated carbon realizes purification by virtue of its unique physical adsorption and chemical adsorption principle. Since the smoke concentration generated by cutting is positively correlated with the temperature of the cutting area, the higher the temperature, the more smoke generated by the gasification and decomposition of the material. Based on this, a ladder type intelligent control strategy is constructed to adjust the number of the plurality of branch pipes 112 used.

[0039] The cleaning mechanism 12 is arranged on the lower end outer wall of the laser generator 4, and is used for cleaning the detection components of the gas suction temperature detection mechanism 10, and the cleaning mechanism 12 comprises a fixed ring 121 arranged on the lower end outer wall of the laser generator 4, the side wall of the fixed ring 121 is provided with a bolt 122 threadedly connected with the side wall of the laser generator 4, and the side wall of the fixed ring 121 is obliquely and fixedly provided with a high-temperature-resistant sponge brush 123, and the high-temperature-resistant sponge brush 123 can be arranged in contact with the detection end of the temperature sensor 104; in the rotating process of the gas suction temperature detection mechanism 10, the temperature sensor 104 will form dynamic contact with the high-temperature-resistant sponge brush 123; the high-temperature-resistant sponge brush 123 can automatically wipe the detection end by virtue of the soft and high-temperature-resistant characteristics, and timely remove the attached smoke dust, debris and other pollutants, so as to avoid the interference of impurities on temperature signal acquisition, ensure that the temperature sensor 104 always maintains high-precision detection performance, and the high-temperature-resistant sponge brush 123 will not be affected by high-temperature gas, and the wiping effect on the temperature sensor 104 is maintained; when the high-temperature-resistant sponge brush 123 needs to be replaced, the bolt 122 is loosened by using a wrench, and the fixed ring 121 can be detached from the outer wall of the laser generator 4.

[0040] The PLC controller 13 is arranged on the side wall of the rack 2, and the vacuum clamp 3, the laser generator 4, the gas cylinder 5, the rotating mechanism 8, the auxiliary nitrogen blowing mechanism 9 and the smoke filtering mechanism 11 are electrically connected with the PLC controller 13.

[0041] The operation principle of the present application is described as follows: the staff first connects the power supply of the cutting device, cleans the surface of the vacuum clamp 3, and then places the LCD liquid crystal display screen to be cut on the top of the vacuum clamp 3; the vacuum pump is started by the PLC controller 13, precise positioning is realized by vacuum adsorption; then, the gas cylinder 5 and the moving assembly 7 are started synchronously by manually operating the PLC controller 13; the fixed cover 81 is driven by the gas cylinder 5 to move downward along the Z-axis direction, so that the laser generator 4 is vertically displaced; the moving assembly 7 drives the laser generator 4 to move flexibly in the X-axis and Y-axis directions, until the laser generator 4 is aligned with the cutting area of the LCD liquid crystal display screen; finally, the laser generator 4 is started by the PLC controller 13, and efficient cutting of the LCD liquid crystal display screen is completed under the cooperation of the moving assembly 7; the laser generator 4 acts on the LCD liquid crystal display screen by using a high-energy-density laser beam, so that the material is rapidly melted;

[0042] In the laser cutting operation, the worker synchronously starts the external nitrogen storage device and the suction fan 103 through the PLC controller 13. Nitrogen is delivered to the nitrogen blowing pipe 92 through the storage device and is precisely sprayed to the cutting area of the LCD liquid crystal display. On the one hand, as an inert gas, nitrogen can effectively isolate oxygen and inhibit the high-temperature oxidation of the material to avoid defects such as ablation and discoloration of the cutting surface. On the other hand, the high-speed nitrogen flow can timely blow away the slag and debris generated during cutting, so that the slag and debris are blown to one side of the cutting area, ensuring the smoothness of the cut and taking away the heat of the cutting area to prevent local overheating from causing material deformation or damage to the liquid crystal layer.

[0043] At the same time, the suction fan 103 continuously operates to make the inside of the box body 101 and the inside of the gas suction pipe 102 in a negative pressure state. Since the gas suction pipe 102 and the nitrogen blowing pipe 92 are oppositely arranged, the nitrogen blowing pipe 92 blows the heat of the cutting area to the gas suction pipe 102, and at the same time, the gas suction pipe 102 sucks in the heat generated during cutting, so that the gas passes through the temperature sensor 104 built-in the gas suction pipe 102. When the gas flows through the temperature sensor 104, the detection end thereof monitors the gas temperature in real time. The temperature sensor 104 transmits data to the PLC controller 13 in the form of an electrical signal. The PLC controller 13 accurately adjusts the opening degree of the valve core of the first electromagnetic valve 93 according to the temperature change. When the temperature of the cutting area rises, the opening degree of the valve core of the first electromagnetic valve 93 is automatically increased to increase the nitrogen supply amount to enhance the cooling and slag removal effect, thereby avoiding the rough cutting edge and burr phenomenon. When the temperature of the cutting area decreases, the opening degree of the valve core of the first electromagnetic valve 93 is reduced to avoid excessive waste of nitrogen and material damage caused by sudden cooling, thereby realizing dynamic and fine control of the nitrogen flow.

[0044] The cutting waste gas sucked into the box body 101 contains smoke particles and volatile harmful gases. When the gas flows through the built-in activated carbon filter screen 111, the activated carbon realizes purification by virtue of its unique physical adsorption and chemical adsorption principle. The activated carbon has a rich microporous structure inside, which can adsorb organic molecules and odor substances in the smoke on the pore surface through intermolecular forces (Van der Waals forces). At the same time, the functional groups on the surface of the activated carbon can chemically react with harmful gases to further enhance the adsorption effect, thereby effectively filtering the smoke components. The filtered clean gas is discharged into the air by the suction fan 103 to avoid polluting the processing environment.

[0045] The concentration of smoke generated by cutting is positively correlated with the temperature of the cutting area. The higher the temperature, the more smoke generated by the gasification and decomposition of the material. Based on this, the PLC controller 13 constructs a ladder-type intelligent control strategy. When the temperature sensor 104 detects that the temperature of the cutting area is between 30-50°C, the system defaults to enable a single branch pipe 112. The PLC controller 13 only opens one second electromagnetic valve 113 to ensure the basic filtering efficiency. When the temperature rises to 50-70°C, the PLC controller 13 automatically starts two second electromagnetic valves 113 to activate two branch pipes 112, which split the smoke gas and double the contact area of the activated carbon filter screen 111. If the temperature exceeds 70°C, the PLC controller 13 will open all three second electromagnetic valves 113, and the three branch pipes 112 will work synchronously to maximize the filtering area and purification efficiency. By dynamically adjusting the number of branch pipes 112 and simultaneously increasing the speed of the suction fan 103 (the current of the suction fan 103 increases by 20% for every 10°C increase in temperature), high-concentration smoke can be efficiently intercepted and purified, ensuring the safety of the cutting operation environment.

[0046] To improve the cutting quality of the LCD liquid crystal display screen, during the cutting operation, the staff manually operates the PLC controller 13 to start the motor 83. The motor 83 operates to drive the pinion gear 84 to rotate, which further drives the gear wheel 82 to rotate, causing the auxiliary nitrogen blowing mechanism 9 and the gas suction temperature detection mechanism 10 installed on both sides of the gear wheel 82 to rotate synchronously. At this time, the nitrogen blowing pipe 92 blows in a rotating manner, and the gas suction pipe 102 sucks in a rotating manner. The rotating nitrogen blowing pipe 92 can uniformly and comprehensively cover the cutting area, avoiding local protection deficiencies or overprotection. No matter how complex the cutting path is, the rotating nitrogen can effectively suppress the oxidation reaction during cutting, ensuring a smooth and smooth cutting surface and reducing defects. At the same time, the rotating airflow can more efficiently remove cutting slag and heat, preventing slag from adhering and affecting cutting effectiveness, reducing the temperature of the cutting area, and preventing material deformation due to overheating. The rotating gas suction pipe 102 greatly expands the capture range of smoke, exhaust gas, and other gases generated during cutting, allowing them to be quickly and comprehensively sucked in. This not only avoids the diffusion of smoke in the working area, improving the working environment, but also allows the gas suction temperature detection mechanism 10 to more accurately obtain the gas temperature of the cutting area, providing reliable data for subsequent precise control. In addition, rotating suction can prevent poor gas flow caused by uneven local suction, ensuring stable and efficient suction.

[0047] Meanwhile, with the rotation of the gas suction temperature detection mechanism 10, the activated carbon filter screen 111 inside the box body 101 will produce centrifugal motion, which can accelerate the contact speed and frequency of smoke and activated carbon, improve the adsorption efficiency of harmful substances in smoke, and make the filtering effect more outstanding. Moreover, the centrifugal force can shake off part of the impurities adsorbed on the activated carbon filter screen 111 and collect them at the bottom of the box body 101, playing a self-cleaning role, delaying the clogging of the filter screen, ensuring the continuous and stable filtering performance. After the processing is completed, the activated carbon filter screen 111 can be removed from the bottom of the box body 101. Not only can new activated carbon filter screen 111 be replaced, but also the impurities at the bottom of the box body 101 can be cleaned;

[0048] During the rotation of the large gear 82, the infrared emitter 85 installed on its upper surface rotates synchronously. When the infrared emitter 85 rotates to the position aligned with the infrared receiver 86 on the side wall of the fixed cover 81, the light beam emitted by the infrared emitter 85 is exactly received by the infrared receiver 86. At this time, the infrared receiver 86 quickly feeds back an electrical signal to the PLC controller 13 (the infrared emitter 85 is based on the photoelectric effect of semiconductor materials. After being powered on, it excites the internal light-emitting element to generate a specific wavelength of infrared light beam and direct it. The infrared receiver 86 uses a photodiode or phototriode as the core element. When the infrared light beam emitted by the infrared emitter 85 shines on the receiver, the photodiode absorbs photon energy, causing the generation of electron-hole pairs, thereby generating an electrical signal change. After being processed by the internal circuit, the optical signal is converted into an electrical signal that can be recognized by the PLC controller 13 and fed back). After receiving the electrical signal, the PLC controller 13 immediately controls the motor 83 to rotate in the opposite direction. In this way, the auxiliary nitrogen gas blowing-out mechanism 9 and the gas suction temperature detection mechanism 10 will rotate in the opposite direction after each rotation, avoiding the problem of wire entanglement connected to each mechanism, and ensuring the continuous and stable operation of the equipment.

[0049] During the cutting process, smoke gas flowing through the surface of the temperature sensor 104 is prone to attaching impurities to the detection end, causing a decrease in detection accuracy. To solve this problem, the temperature sensor 104 will form dynamic contact with the high-temperature-resistant sponge brush 123 fixed to the side wall of the laser generator 4 during the rotation of the gas suction temperature detection mechanism 10. When the temperature sensor 104 rotates past the sponge brush, the high-temperature-resistant sponge brush 123 automatically wipes the detection end due to its soft and high-temperature-resistant properties, timely removing attached smoke dust, debris, and other pollutants, avoiding impurity interference with temperature signal collection, and ensuring that the temperature sensor 104 always maintains high-precision detection performance, providing accurate temperature data for the PLC controller 13, thereby achieving precise regulation and control of the cutting process.

[0050] After the cutting process is completed, the worker issues an instruction by operating the PLC controller 13, precisely controls the laser generator 4 to reset to the initial position along the X, Y and Z axes, then disconnects the power supply of the equipment, and after the equipment is completely stopped, the adsorption state of the vacuum clamp 3 is released, the completed cut LCD is carefully taken off, then the surface of the vacuum clamp 3 is carefully cleaned with special tools to remove the residual edge material, slag and debris, so that the clamp surface is clean and ready for the next cutting operation, effectively avoiding the influence of residual impurities on the adsorption positioning accuracy and cutting quality of the subsequent workpiece.

[0051] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A laser cutting device for an LCD display screen, comprising a base (1), a frame (2), a vacuum fixture (3) and a laser generator (4), wherein the frame (2) is fixedly arranged on the top of the base (1), a cylinder (5) is fixedly provided on the top of the frame (2), a movable cover (6) is fixedly provided on the movable end of the cylinder (5), a movable component (7) is provided inside the movable cover (6), the laser generator (4) is arranged at the bottom of the movable component (7), and the vacuum fixture (3) is fixedly provided on the top of the base (1), characterized in that: Also include: Rotary mechanism (8) is arranged on the outer wall of the laser generator (4), and the rotary mechanism (8) can be forward and reverse, the rotary mechanism (8) includes a fixed cover (81) fixedly arranged on the outer wall of the laser generator (4), the inside of the fixed cover (81) is provided with a large gear (82), and the inner wall of the large gear (82) is rotatably connected with the outer wall of the laser generator (4) through a bearing, the top inner wall of the fixed cover (81) is fixedly provided with a motor (83), the output shaft of the motor (83) is fixedly provided with a small gear (84), and the small gear (84) is meshed with the large gear (82); Auxiliary nitrogen blowing mechanism (9) is arranged at the bottom of the rotary mechanism (8), and the auxiliary nitrogen blowing mechanism (9) is located on one side of the laser generator (4), the auxiliary nitrogen blowing mechanism (9) includes a fixed rod (91) fixedly arranged on one side of the lower surface of the large gear (82), the lower end of the fixed rod (91) is fixedly provided with a nitrogen blowing pipe (92), the pipe wall of the nitrogen blowing pipe (92) is fixedly provided with a first electromagnetic valve (93), and one end of the nitrogen blowing pipe (92) is connected with an external nitrogen storage device through a conduit; Gas suction temperature detection mechanism (10) is arranged at the bottom of the rotary mechanism (8), and the gas suction temperature detection mechanism (10) is located on the other side of the laser generator (4), the gas suction temperature detection mechanism (10) includes a box body (101) fixedly arranged on the other side of the lower surface of the large gear (82), the bottom of the box body (101) is fixedly provided with a gas suction pipe (102), the side wall of the box body (101) is fixedly provided with a suction fan (103), the gas suction pipe (102) is a curved pipe, and the lower end of the gas suction pipe (102) is detachably provided with a temperature sensor (104); The smoke filtering mechanism (11) is arranged in the gas suction temperature detection mechanism (10), the smoke filtering mechanism (11) includes an activated carbon filter screen (111) fixedly arranged in the box body (101), the upper end of the gas suction pipe (102) extends to the inside of the box body (101) and is fixedly provided with a plurality of branch pipes (112), the plurality of branch pipes (112) are arranged on one side of the activated carbon filter screen (111), and the pipe wall of the plurality of branch pipes (112) is provided with a second electromagnetic valve (113); when the temperature sensor (104) detects that the cutting area temperature is 30-50 DEG C, only one second electromagnetic valve (113) is opened, so that a single branch pipe (112) is smooth, and the basic filtering efficiency is ensured; when the temperature rises to 50-70 DEG C, the smoke concentration increases, two second electromagnetic valves (113) are started, so that two branch pipes (112) are smooth, the contact area of the smoke gas and the activated carbon filter screen (111) is increased, and the filtering efficiency is improved; if the temperature exceeds 70 DEG C, the smoke concentration is maximum, three second electromagnetic valves (113) are all opened, so that three branch pipes (112) are smooth, the filtering area of the activated carbon filter screen (111) is maximized, and meanwhile, the current of the suction fan (103) is increased by 20% when the temperature is increased by 10 DEG C, so that the speed of sucking smoke gas and the efficiency of purifying smoke gas are improved; The cleaning mechanism (12) is arranged on the lower end outer wall of the laser generator (4), and is used for cleaning the detection components of the gas suction temperature detection mechanism (10); The PLC controller (13) is arranged on the side wall of the rack (2), and the vacuum clamp (3), the laser generator (4), the cylinder (5), the rotating mechanism (8), the auxiliary nitrogen blowing mechanism (9) and the smoke filtering mechanism (11) are electrically connected with the PLC controller (13).

2. The laser cutting device for LCD liquid crystal display screen according to claim 1, characterized in that, The upper surface of the large gear (82) is fixedly provided with an infrared emitter (85), and the inner wall of one side of the fixed cover (81) is fixedly provided with an infrared receiver (86), and the infrared receiver (86) is arranged in position correspondence with the infrared emitter (85).

3. The laser cutting device for LCD liquid crystal display panel according to claim 1, characterized in that, The opening of the gas suction pipe (102) is provided with a mounting sleeve (105), the two sides of the mounting sleeve (105) and the lower end inner wall of the gas suction pipe (102) are fixedly provided with a connecting rod (106), the temperature sensor (104) is threadedly connected with the mounting sleeve (105), and the detection end of the temperature sensor (104) extends to the outside of the gas suction pipe (102).

4. The laser cutting device for LCD liquid crystal display panel according to claim 1, characterized in that, The cleaning mechanism (12) comprises a fixing ring (121) sleeved on the outer wall of the lower end of the laser generator (4), the side wall of the fixing ring (121) is provided with a bolt (122) threadedly connected with the side wall of the laser generator (4), the side wall of the fixing ring (121) is obliquely and fixedly provided with a high-temperature-resistant sponge brush (123), and the high-temperature-resistant sponge brush (123) can be in contact with the detection end of the temperature sensor (104).

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