Liquid crystal screen high-precision cover glass production line

Abstract

The invention relates to the technical field of liquid crystal screen manufacturing, and particularly discloses a liquid crystal screen high-precision cover glass production line, which comprises a machine table, and a turntable unit, a shell loading unit, a shell detection unit, a glass supply unit, a glass loading manipulator, a film tearing unit, a cover glass taking unit, a glass detection unit and a cover glass unloading unit which are integrated on the machine table, the shell feeding unit, the cover glass taking unit and the cover glass discharging unit are linked through the intermittently-driven rotating disc unit, synchronous circulation of shells and glass is achieved, space coordinate matching is formed through the shell detection unit and the glass detection unit, the installation precision is improved, and the production efficiency is improved. Meanwhile, the film tearing unit realizes automatic stripping of the protective film in the glass transferring process of the material taking and cover glass unit; according to the invention, from automatic and accurate feeding of the shell, automatic supply of the glass storage box and integrated operation of film tearing, detection and glass covering, full-process automation is realized, manual operation is completely replaced, and the problems of pollution, positioning deviation and low efficiency in the glass mounting process are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid crystal screen production, and particularly refers to a high-precision cover glass production line for liquid crystal screens. Background Art

[0002] In the manufacturing process of liquid crystal display modules (LCMs), the assembly of the backlight module (Backlight Unit, BLU) is one of the key links. Among them, components such as a reflector, a light guide plate, and optical films need to be sequentially installed inside the housing of the liquid crystal screen. Finally, a glass substrate needs to be accurately covered on the surface of the module to form an optical display interface.

[0003] Currently, the installation of this glass substrate generally adopts manual operation. The specific process is as follows: First, the operator takes out the stacked glass substrates one by one from the storage box, then manually peels off the protective film covering the glass installation surface (used to protect the cleanliness of the glass surface during transportation and storage), and finally aligns the glass substrate with the housing card slot for positioning and installation.

[0004] However, this manual operation mode has the following obvious defects:

[0005] 1. High labor intensity: The operator needs to repeatedly perform actions such as taking pieces, tearing films, aligning positions, and placing them. Especially in mass production, it is easy to cause muscle strain.

[0006] 2. Low production efficiency: The piece-by-piece processing method takes a long time, and the film tearing and positioning steps cannot be carried out in parallel, seriously restricting the production line rhythm.

[0007] 3. Unstable installation accuracy: Manual alignment depends on the operator's experience and is prone to micron-level offsets, resulting in light leakage or uneven brightness at the screen edge.

[0008] 4. High risk of surface contamination: During film tearing and handling, human contact is likely to leave fingerprints, sweat stains, or dust on the glass surface, reducing the optical transmittance.

[0009] 5. Loss of product yield: The above-mentioned contamination and positioning deviation will directly cause defects such as display color spots and Newton rings, increasing the repair cost. Summary of the Invention

[0010] The purpose of the present invention is to provide a high-precision cover glass production line for liquid crystal screens to overcome the deficiencies of the prior art.

[0011] To achieve the above purpose, the technical solution adopted by the present invention is: A high-precision cover glass production line for liquid crystal screens, including a machine table, a turntable unit, a housing feeding unit, a housing detection unit, a material taking cover glass unit, a glass feeding unit, a glass feeding manipulator, a film tearing unit, a glass detection unit, and a cover glass discharging unit respectively arranged on the machine table;

[0012] The turntable unit includes a horizontally placed turntable and an intermittent mechanism for driving the turntable to move intermittently; on the turntable, a loading station, a cover glass station, and a unloading station are respectively arranged in a circumferentially uniform manner, and a suction cup assembly for fixing the housing is arranged at each station.

[0013] The housing loading unit includes a loading conveyor line 31 for conveying the housing, a positioning mechanism arranged on the magnetic wheel conveyor line for on-line positioning of the housing, a lifting mechanism arranged on the magnetic wheel conveyor line for lifting the positioned housing, and a housing loading manipulator for placing the positioned housing on the loading station.

[0014] The housing detection unit is located directly above the cover glass station and is used to identify the positions of the four corners of the housing on the cover glass station from top to bottom.

[0015] The glass feeding unit is used to convey the storage box storing the glass to the material taking position of the glass loading manipulator and can output the empty box.

[0016] The glass loading manipulator is used to pick up the glass piece by piece from the storage box for loading.

[0017] The film tearing unit includes a positioning platform and a film clamping mechanism; the positioning platform is used to position the glass and is placed obliquely in the horizontal direction; the film clamping mechanism is located at a corner of the positioning platform and is used to clamp the protective film at a bottom corner of the glass.

[0018] The material taking and cover glass unit is used to pick up the glass from the positioning platform, peel off the protective film at the bottom of the glass in cooperation with the film clamping mechanism, then send it to the glass detection unit to detect and adjust the angle and position of the glass, and finally install it into the housing at the cover glass station.

[0019] The glass detection unit is located inside the machine table and is used to identify the positions of the four corners of the glass from bottom to top.

[0020] The cover glass unloading unit includes a cover glass unloading conveyor line and a cover glass unloading manipulator; the cover glass unloading manipulator is used to pick up the housing with the installed glass from the unloading station and place it on the cover glass unloading conveyor line.

[0021] Preferably, it further includes a backlight module cleaning unit.

[0022] A cleaning station is further arranged between the loading station and the cover glass station on the turntable.

[0023] The backlight module cleaning unit includes a cleaning bracket, a support mechanism arranged on the cleaning bracket and located below the cleaning station, and a cleaning mechanism arranged on the cleaning bracket and located above the cleaning station.

[0024] The cleaning mechanism includes a horizontally placed cleaning linear module, a slide table arranged at the driving end of the cleaning linear module, a floating frame vertically slidably arranged on the slide table, a groove-shaped cam in a planar structure and arranged parallel to the cleaning linear module, a track groove on the groove-shaped cam with a lower middle and higher ends, a roller arranged on the floating frame and located in the track groove, a cleaning frame arranged at the bottom of the floating frame and perpendicular to the cleaning linear module, and a dust sticking roller rotatably arranged on the cleaning frame for cleaning the surface of the backlight module; an elastic component is arranged between the floating frame and the cleaning frame;

[0025] The support mechanism has a lifting function and is used to support the bottom of the cleaning station or both ends of the upper shell of the cleaning station.

[0026] Preferably, it further includes a backlight module detection unit and a defective product discharging unit;

[0027] The backlight module detection unit is located on one side of the cleaning station and is used to conduct a power-on test on the cleaned backlight module. It includes a backlight module detection manipulator, a power-on mechanism, a visual positioning module, and a visual detection module respectively arranged at the driving end of the backlight module detection manipulator; the visual positioning module is used to identify the power-on position of the backlight module in the upper shell of the cleaning station; the power-on mechanism is used to power on the backlight module in the upper shell of the cleaning station; the visual detection module is located directly above the cleaning station and is used to inspect the powered-on backlight module;

[0028] A defective product discharging station is further arranged between the cleaning station and the cover glass station on the turntable;

[0029] The defective product discharging unit is located on one side of the defective product discharging station and includes a defective product discharging conveyor line and a defective product discharging manipulator; the defective product discharging manipulator is used to place the shell with a defective backlight module from the defective product discharging station onto the defective product discharging conveyor line for flowing out.

[0030] Preferably, it further includes an easy tear sticker pasting unit;

[0031] The easy tear sticker pasting unit is used to paste an easy tear sticker at a corner of the bottom protective film of the glass, facilitating the clamping mechanism to clamp the easy tear sticker and cooperate with the glass cover taking unit to peel off the protective film at the bottom of the glass.

[0032] Preferably, it further includes a mobile platform;

[0033] One end of the mobile platform is located at the material taking position of the glass cover taking unit, and the other end is located at the easy tear sticker pasting unit;

[0034] The film peeling unit is arranged on the mobile platform and can reciprocate between the material taking position of the glass cover taking unit and the easy tear sticker pasting unit.

[0035] Preferably, it further includes a glass calibration unit and a calibrated blanking manipulator;

[0036] The glass calibration unit is used to calibrate and position the glass;

[0037] The calibrated blanking manipulator is used to send the calibrated and positioned glass from the glass calibration unit to the easy tear sticker pasting unit to paste the easy tear sticker, and finally place it on the positioning platform.

[0038] Preferably, it further includes a glass cleaning unit and a cleaned blanking manipulator;

[0039] The glass cleaning unit includes a cleaning conveyor line and a cleaning machine arranged on the cleaning conveyor line for cleaning the glass;

[0040] The cleaned blanking manipulator is used to place the cleaned glass from the cleaning conveyor line on the glass calibration unit.

[0041] Preferably, it further includes a translation module;

[0042] One end of the translation module is located at the blanking position of the cleaned blanking manipulator, and the other end is located at the loading position of the calibrated blanking manipulator;

[0043] The glass calibration unit is arranged on the translation module and can reciprocate between the blanking position of the cleaned blanking manipulator and the loading position of the calibrated blanking manipulator.

[0044] Preferably, it further includes a waste collection unit;

[0045] The waste collection unit is arranged inside the machine table and is located between the material taking position of the material taking cover glass unit and the glass detection unit, and is used to collect the peeled protective film.

[0046] Preferably, it further includes a pressing unit;

[0047] The pressing unit is arranged on the cover glass blanking conveyor line and is used to press and process the glass and the outer shell.

[0048] Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art:

[0049] 1. The present invention adopts multi-station collaborative operation, that is, through the intermittently driven turntable unit to link the outer shell loading unit, the material taking cover glass unit and the cover glass blanking unit, realizing the synchronous transfer of the outer shell and the glass;

[0050] 2. The present invention adopts a two-stage positioning method, that is, the outer shell detection unit (identifying the four corners of the outer shell from top to bottom) and the glass detection unit (identifying the four corners of the glass from bottom to top) form a spatial coordinate matching to ensure the installation accuracy ≤ ±0.1 mm;

[0051] 3. The present invention adopts a dynamic film tearing method, that is, the positioning platform is placed obliquely in the horizontal direction, and the film clamping mechanism clamps a corner of the protective film, so as to realize the automatic peeling of the protective film during the process of the glass taking and covering glass unit transferring the glass;

[0052] 4. The present invention realizes full-process automation, that is, from the accurate feeding of the outer shell magnetic wheel and the automatic supply of the glass storage box, to the integrated operation of film tearing - detection - covering glass, and finally the finished product is output by the covering glass discharging unit;

[0053] 5. The present invention completely replaces manual operation, and solves the problems of pollution, positioning deviation and low efficiency in the process of glass installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The technical solution of the present invention will be further described below with reference to the drawings:

[0055] FIG Figure 1 is a top view of the high-precision covering glass production line for liquid crystal screens according to the present invention;

[0056] FIG Figure 2 is a top view of the feeding conveyor line according to the present invention;

[0057] FIG Figure 3 is a perspective view of the feeding conveyor line according to the present invention;

[0058] FIG Figure 4 is a structural schematic diagram of the end positioning component according to the present invention;

[0059] FIG Figure 5 is a structural schematic diagram of the side positioning component according to the present invention;

[0060] FIG Figure 6 is a structural schematic diagram of the outer shell detection unit according to the present invention;

[0061] FIG Figure 7 is a structural schematic diagram of the glass feeding unit, the glass loading manipulator and the glass cleaning unit according to the present invention;

[0062] FIG Figure 8 is a structural schematic diagram of the film tearing unit installed on the moving platform according to the present invention;

[0063] FIG Figure 9 is a structural schematic diagram of the film tearing unit according to the present invention;

[0064] FIG Figure 10 is a structural schematic diagram of the positioning platform according to the present invention;

[0065] FIG Figure 11 is a structural schematic diagram of the movable positioning part according to the present invention;

[0066] FIG Figure 12 is a structural schematic diagram of the glass taking and covering glass unit according to the present invention;

[0067] Attached Figure 13 is a schematic structural diagram of the backlight module cleaning unit and the turntable in the present invention;

[0068] Attached Figure 14 is a schematic structural diagram of the cleaning mechanism in the present invention;

[0069] Attached Figure 15 is a schematic structural diagram of the backlight module detection unit in the present invention;

[0070] Attached Figure 16 is a schematic structural diagram of the easy tear sticker pasting unit in the present invention;

[0071] Attached Figure 17 is a schematic structural diagram of the easy tear sticker pasting manipulator in the present invention;

[0072] Attached Figure 18 is a schematic structural diagram of the calibration blanking manipulator in the present invention;

[0073] Attached Figure 19 is a schematic structural diagram of the cover glass blanking conveyor line in the present invention;

[0074] Attached Figure 20 is Figure 19 a partial enlarged view at A in

[0075] Wherein: 1. Machine table;

[0076] 2. Turntable unit; 2A. Loading station; 2B. Cleaning station; 2C. Defective product blanking station; 2D. Cover glass station; 2E. Blanking station;

[0077] 3. Outer shell loading unit; 31. Loading conveyor line; 311. Avoidance part; 312. Roller; 32. Outer shell loading manipulator; 33. End positioning component; 331. End positioning cylinder; 332. End lifting cylinder; 333. End mounting frame; 334. End positioning column; 34. Side positioning component; 341. Side positioning cylinder; 342. Side mounting frame; 343. Side positioning column; 35. Lifting mechanism; 351. Loading lifting plate; 352. Loading lifting cylinder;

[0078] 4. Outer shell detection unit; 41. Outer shell detection gantry; 42. Square top plate; 43. Hollow part; 44. Outer shell detection X-axis linear module; 45. Outer shell detection guide rail assembly; 46. Outer shell detection Y-axis linear module; 47. Visual recognition module;

[0079] 5. Pick-up cover glass unit; 51. Pick-up cover glass bracket; 52. Pick-up cover glass X-axis linear module; 53. Pick-up cover glass Y-axis linear module; 54. Pick-up cover glass Z-axis linear module; 55. Angle adjustment motor; 56. Pick-up cover glass suction cup;

[0080] 6. Glass feeding unit; 61. Glass feeding bracket; 62. Glass feeding conveyor line; 63. Empty box discharging conveyor line; 64. Empty box handling manipulator;

[0081] 7. Glass loading manipulator;

[0082] 8. Film tearing unit; 81. Positioning platform; 811. Positioning table; 8111. Long strip groove; 8112. Slide groove; 812. Fixed limit piece; 8121. Fixed block; 8122. Fixed limit wheel; 813. Movable positioning piece; 8131. Positioning linear module; 8132. Movable positioning frame; 8133. Movable positioning wheel; 82. Film clamping mechanism; 821. Film clamping translation cylinder; 822. Film clamping frame; 823. Film tearing jaw cylinder;

[0083] 9. Glass detection unit;

[0084] 10. Cover glass unloading unit; 101. Cover glass unloading manipulator; 102. Cover glass unloading conveyor line; 1021. Equally spaced conveying table; 1022. Blanking table; 10221. Avoidance groove; 1023. Slide rail assembly; 1024. Lifting assembly; 10241. Slide seat; 10242. Blanking lifting cylinder; 10243. Blanking lifting plate; 1025. Link; 1026. Conveying linear module;

[0085] 11. Backlight module cleaning unit; 111. Cleaning bracket; 112. Support mechanism; 1121. Support plate; 1122. Support cylinder; 113. Cleaning mechanism; 1131. Cleaning linear module; 1132. Slide table; 1133. Floating frame; 1134. Grooved cam; 1135. Trajectory groove; 1136. Cleaning frame; 1137. Dust sticking roller; 1138. Elastic component;

[0086] 12. Backlight module detection unit; 121. Backlight module detection manipulator; 122. Power-on mechanism; 123. Visual positioning module;

[0087] 13. Defective product unloading unit; 131. Defective product unloading conveyor line; 132. Defective product unloading manipulator;

[0088] 14. Easy tear sticker pasting unit; 141. Easy tear sticker feeding mechanism; 1411. Easy tear sticker feeding bracket; 1412. Easy tear sticker unwinding roller; 1413. Easy tear sticker winding roller; 1414. Easy tear sticker guide roller; 1415. Easy tear sticker picking position; 142. Easy tear sticker pasting manipulator; 1421. Easy tear sticker translation linear module; 1422. Easy tear sticker Z-axis linear module; 1423. Easy tear sticker rotation motor; 1424. Easy tear sticker jaw cylinder; 1425. Easy tear sticker vision module;

[0089] 15. Mobile platform; 16. Glass calibration unit; 17. Calibration blanking manipulator;

[0090] 18. Glass cleaning unit; 181. Cleaning conveyor line; 182. Cleaning machine;

[0091] 19. Cleaning blanking manipulator; 20. Translation module; 21. Pressing unit;

[0092] 22. Scrap collection unit;

[0093] 23. Outer shell; 24. Glass; 25. Peelable sticker. Detailed implementation mode

[0094] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0095] Accompanying Figures 1-20 The high-precision cover glass production line for liquid crystal screens described in the present invention includes a machine table 1, a turntable unit 2, a housing loading unit 3, a housing detection unit 4, a pick-up cover glass unit 5, a glass feeding unit 6, a glass loading manipulator 7, a film tearing unit 8, a glass detection unit 9, and a cover glass blanking unit 10, which are respectively arranged on the machine table 1;

[0096] As Figure 13 shown, the turntable unit 2 includes a horizontally placed turntable and an intermittent mechanism for driving the turntable to move intermittently; on the turntable, there are respectively arranged a loading station 2A, a cover glass station 2D, and a blanking station 2E that are evenly placed in the circumferential direction, and a suction cup assembly for fixing the outer shell 23 is arranged on each station;

[0097] As Figures 1-2 shown, the housing loading unit 3 includes a loading conveyor line 31 for transporting the outer shell 23, a positioning mechanism for on-line positioning of the outer shell 23 arranged on the magnetic wheel conveyor line, a lifting mechanism 35 for lifting the positioned outer shell 23 arranged on the magnetic wheel conveyor line, and a housing loading manipulator 32 for placing the positioned outer shell 23 on the loading station 2A;

[0098] The housing detection unit 4 is located directly above the cover glass station 2D and is used to identify the positions of the four corners of the outer shell 23 on the cover glass station 2D from top to bottom;

[0099] The glass feeding unit 6 is used to transport the storage box storing the glass 24 to the picking position of the glass loading manipulator 7 and can output the empty box;

[0100] The glass loading manipulator 7 is used to pick up the glass 24 one by one from the storage box for loading;

[0101] As Figure 8As shown in the figure, the film tearing unit 8 includes a positioning platform 81 and a film clamping mechanism 82; the positioning platform 81 is used to position the glass 24 and is placed obliquely in the horizontal direction; the film clamping mechanism 82 is located at a corner of the positioning platform 81 and is used to clamp the protective film protruding from a bottom corner of the glass 24.

[0102] The material taking cover glass unit 5 is used to take the glass 24 from the positioning platform 81, peel off the protective film at the bottom of the glass 24 in cooperation with the film clamping mechanism 82, and then send it to the glass detection unit 9 to detect and adjust the angle and position of the glass 24, and finally install it into the outer shell 23 at the cover glass station 2D.

[0103] The glass detection unit 9 is located inside the machine table 1 and is used to identify the positions of the four corners of the glass 24 from bottom to top.

[0104] As Figure 1 shown in the figure, the cover glass unloading unit 10 includes a cover glass unloading conveyor line 102 and a cover glass unloading manipulator 101; the cover glass unloading manipulator 101 is used to take the outer shell 23 with the glass 24 installed from the unloading station 2E and place it on the cover glass unloading conveyor line 102.

[0105] During operation: The production line of the previous process conveys the outer shell 23 with the backlight module installed onto the loading conveyor line 31; when the loading conveyor line 31 conveys the outer shell 23 to the material taking position of the outer shell loading manipulator 32, the positioning mechanism positions the outer shell 23 online, and the lifting mechanism 35 lifts the positioned outer shell 23 from the loading conveyor line 31, and then the outer shell loading manipulator 32 takes the lifted outer shell 23 and places it on the loading station 2A of the turntable. Then, the suction cup assembly fixes the outer shell 23 to prevent the outer shell 23 from shifting during the rotation of the turntable. Then, the intermittent mechanism drives the turntable to rotate intermittently until the turntable moves the outer shell 23 from the loading station to the cover glass station 2D. Then, the outer shell detection unit 4 identifies the positions of the four corners of the outer shell 23 at the cover glass station 2D from top to bottom.

[0106] During this period, the glass feeding unit 6 transports the storage box containing the glass 24 to the glass loading robot 7 taking position and outputs the empty box; the glass loading robot 7 takes the glass 24 piece by piece from the storage box for loading; when the glass 24 is placed on the positioning platform 81, the positioning platform 81 positions the glass 24, and then the film clamping mechanism 82 clamps the protective film at the bottom corner of the glass 24 (this method is suitable for the occasion where the protective film protrudes from the bottom corner of the glass 24), and then the cover glass unit 5 takes the glass 24 from the positioning platform 81. 82 clamps the protective film at one corner of the bottom of the glass 24, and the positioning platform 81 is tilted in the horizontal direction. The cover glass picking unit 5 automatically peels off the protective film at the bottom of the glass 24 during the driving upward and translational movement, and then sends it to the glass detection unit 9 for detection. At this time, the cover glass picking unit 5 will adjust the angle and position of the glass 24 according to the position information of the four corners of the shell 23 collected by the shell detection unit 4 and the position information of the four corners of the glass 24 collected by the glass detection unit 9, so as to accurately install the glass 24 into the shell 23 of the cover glass station 2D;

[0107] Finally, the intermittent mechanism drives the turntable to rotate intermittently until the turntable moves the shell 23 installed with the glass 24 from the cover glass station 2D to the unloading station 2E. At this time, the suction cup assembly releases the shell 23, and the cover glass unloading robot 101 takes the shell 23 installed with the glass 24 from the unloading station 2E and places it on the production line of the next process on the cover glass unloading conveyor line 102.

[0108] Further, if Figures 2-3 As shown, the loading conveyor line 31 adopts a magnetic wheel conveyor line, which adopts magnetic wheel transmission. The active magnetic wheel and the driven magnetic wheel have no contact and are driven by the magnetism of the magnetic wheel. It can meet the requirements of dust-free, low noise and anti-static level, and is suitable for dust-free workshops with relatively high conveying requirements.

[0109] Further, if Figures 2-4 As shown, the positioning mechanism includes end positioning components 33 respectively located at both ends of the magnetic wheel conveying line and side positioning components 34 respectively located at both sides of the magnetic wheel conveying line;

[0110] The middle part of the magnetic wheel conveyor line is provided with an avoidance portion 311, such as a small magnetic wheel conveyor line disclosed in prior art 202020670476.7, which facilitates the installation of the end positioning assembly 33;

[0111] A gap is provided between adjacent rollers 312 of the magnetic wheel conveyor line, such as a magnetic wheel driven conveyor line disclosed in the existing patent CN202223389042.8, to facilitate the installation of the side positioning assembly 34;

[0112] The end positioning assembly 33 includes an end positioning cylinder 331 horizontally arranged at the end of the avoidance portion 311 and moving in a direction perpendicular to the roller 312, an end lifting cylinder 332 vertically arranged at the driving end of the end positioning cylinder 331, an end mounting frame 333 arranged at the driving end of the end lifting cylinder 332, and two end positioning posts 334 vertically arranged on the end mounting frame 333 and spaced apart along the axis of the roller 312; the end positioning posts 334 are initially positioned lower than the conveying surface of the roller 312;

[0113] The side positioning assembly 34 includes a side positioning cylinder 341 horizontally arranged below the roller 312 and moving in a direction parallel to the roller 312, a side mounting frame 342 arranged at the driving end of the side positioning cylinder 341 and placed perpendicular to the roller 312, and a plurality of side positioning posts 343 vertically arranged on the side mounting frame 342 and located between adjacent rollers 312; the top end of the side positioning posts 343 is always higher than the conveying surface of the roller 312;

[0114] When the loading conveyor line 31 conveys the shell 23 to the shell loading robot 32 taking material position, the side positioning components 34 on both sides of the magnetic wheel conveyor line are actuated at the same time, and the side mounting frame 342 is driven by the side positioning cylinder 341 to drive the side positioning column 343 to move toward the center, thereby realizing the width direction positioning of the glass 24; at the same time, the end positioning components 33 at both ends of the magnetic wheel conveyor line are also actuated at the same time, first driving the end positioning column 334 higher than the roller 312 by the end lifting cylinder 332, and then driving the end positioning cylinder 331 to move toward the center, thereby realizing the length direction positioning of the glass 24.

[0115] Further, if Figures 2-3 As shown, the lifting mechanism 35 includes a loading lifting plate 351 horizontally arranged in the avoidance portion 311 and in the shape of a Chinese character "丰", and a loading lifting cylinder 352 arranged in the magnetic wheel conveyor line for driving the loading lifting plate 351 to move up and down; the initial position of the loading lifting plate 351 is not higher than the conveying surface of the roller 312;

[0116] When the positioning mechanism completes the positioning of the shell 23 online, the loading lifting cylinder 352 drives the loading lifting plate 351 to lift the shell 23 from the magnetic wheel conveyor line, making it easier for the loading robot to pick up the shell 23.

[0117] Furthermore, the intermittent mechanism is a prior art, such as a cam divider, so its structure will not be described in detail.

[0118] Further, if Figure 6As shown in the figure, the housing detection unit 4 includes a housing detection gantry 41, a square-top plate 42 horizontally arranged on the top of the housing detection gantry 41, a hollow part 43 arranged on the square-top plate 42, a housing detection X-axis linear module 44 and a housing detection guide rail assembly 45 horizontally arranged on the square-top plate 42 and located on both sides of the hollow part 43 respectively, and two housing detection Y-axis linear modules 46 with one end slidably arranged on the housing detection guide rail assembly 45 and placed in parallel.

[0119] Both the housing detection X-axis linear module 44 and the housing detection Y-axis linear module 46 are double-slide linear modules, where two slides are symmetrically arranged on the linear module and move closer to or away from each other simultaneously under the drive of the linear module.

[0120] The other ends of the two housing detection Y-axis linear modules 46 are respectively located on the two slides of the two housing detection X-axis linear modules 44; visual recognition modules 47 are arranged on the two slides of the housing detection Y-axis linear module 46.

[0121] During operation: The positions of the four corners of the housing 23 on the cover glass station 2D are recognized from top to bottom by the four visual recognition modules 47 respectively; when testing housings 23 of different sizes, the distance between the visual recognition modules 47 can be coordinated and adjusted by one housing detection X-axis linear module 44 and two housing detection Y-axis linear modules 46, which can meet the requirements of diverse scenarios and adapt to products of different sizes.

[0122] Further, as Figure 7 shown in the figure, the glass feeding unit 6 includes a glass feeding support 61, a glass feeding conveyor line 62 and an empty box discharging conveyor line 63 horizontally arranged in the glass feeding support 61 and placed side by side, and an empty box handling manipulator 64 arranged on the glass feeding support 61 for placing the empty boxes on the glass feeding conveyor line 62 onto the empty box discharging conveyor line 63.

[0123] During operation: A storage box storing glass 24 is placed on the glass feeding conveyor line 62 manually or by an automated device, and the storage box storing glass 24 is conveyed to the loading position of the glass loading manipulator 7 through the glass feeding conveyor line 62, and then the glass loading manipulator 7 takes the glass 24 piece by piece from the inside for loading; when the storage box at the loading position of the glass loading manipulator 7 is empty, the empty box handling manipulator 64 places the empty box on the glass feeding conveyor line 62 onto the empty box discharging conveyor line 63 for flowing out, realizing automatic feeding of the glass 24 and reducing manual participation; among them, the empty box handling manipulator 64 is a prior art and uses an XZ-axis linear module to drive a jaw cylinder to pick up and place the empty box, so its structure will not be introduced in detail.

[0124] Further, as Figure 8As shown, the positioning platform 81 includes a horizontally placed positioning table 811; on two right-angled sides of the positioning table 811 near a corner of the film clamping mechanism 82, fixed limit members 812 are provided, and on the other two opposite sides, movable positioning members 813 are provided;

[0125] After the glass 24 is placed on the positioning table 811, the movable positioning members 813 on both sides of the positioning table 811 move towards the center simultaneously, causing the glass to deflect diagonally towards a corner near the film clamping mechanism 82 until the four sides of the glass 24 are respectively in contact with the two groups of fixed limit members 812 and the two groups of movable positioning members 813 to achieve positioning. At this time, the protective film protruding from a corner at the bottom of the glass 24 is located outside the positioning table 811, thus facilitating the film clamping mechanism 82 to clamp it for subsequent peeling.

[0126] Further, as Figure 10 shown, long slots 8111 are respectively provided along two right-angled edges of the positioning table 811 near a corner of the film clamping mechanism 82;

[0127] The fixed limit member 812 includes a fixed block 8121, a fixed limit wheel 8122 and a fixed bolt; the fixed block 8121 is closely attached to the side of the positioning table 811; the fixed bolt passes through the long slot 8111 to fix the fixed block 8121 on the positioning table 811, and by loosening or tightening the fixed bolt, the position of the fixed block 8121 can be adjusted along the long slot 8111; the fixed limit wheel 8122 is arranged on the fixed block 8121 and is higher than the upper surface of the positioning table 811.

[0128] Further, as Figures 10-11 shown, on both sides of the positioning table 811 far from a corner of the film clamping mechanism 82, chutes 8112 extending towards the center are provided;

[0129] The movable positioning member 813 includes a positioning linear module 8131 arranged below the positioning table 811 and parallel to the chute 8112, a movable positioning frame 8132 arranged at the driving end of the positioning linear module 8131, and a movable positioning wheel 8133 vertically arranged on the movable positioning frame 8132 and passing through the chute 8112 and higher than the upper surface of the positioning table 811;

[0130] During positioning: the positioning linear module 8131 drives the movable positioning frame 8132 to drive the movable positioning wheel 8133 to move towards the center to position the glass 24.

[0131] Further, as Figures 9-11 shown, there are two fixed limit wheels 8122 on both sides of the positioning table 811 and two movable positioning wheels 8133 on the other two sides, so that the glass 24 will not tilt during the positioning process, improving the positioning effect.

[0132] Further, as Figure 9As shown, the film clamping mechanism 82 includes a horizontally placed film clamping translation cylinder 821, a film clamping frame 822 vertically arranged at the driving end of the film clamping translation cylinder 821, and a film tearing jaw cylinder 823 horizontally arranged on the film clamping frame 822 and at the same height as the positioning table 811.

[0133] After the positioning platform 81 positions the glass 24, first, the film clamping translation cylinder 821 drives the film clamping frame 822 to drive the film tearing jaw cylinder 823 to extend until the protective film protruding from a corner of the positioning table 811 is located inside the film tearing jaw cylinder 823. Finally, the film tearing jaw cylinder 823 clamps the protective film protruding from a corner of the positioning table 811 for subsequent peeling.

[0134] Further, as Figure 12 shown, the cover glass picking unit 5 includes a cover glass picking bracket 51, a cover glass X-axis linear module 52 horizontally arranged on the cover glass picking, a cover glass Y-axis linear module 53 arranged at the driving end of the cover glass X-axis linear module 52 and perpendicular to the cover glass X-axis linear module 52, a cover glass Z-axis linear module 54 vertically arranged at the driving end of the cover glass Y-axis linear module 53 and perpendicular to the cover glass Y-axis linear module 53, an angle adjustment motor 55 vertically arranged at the driving end of the cover glass Z-axis linear module 54, and a cover glass suction cup 56 horizontally arranged at the driving end of the angle adjustment motor 55.

[0135] After the film tearing jaw cylinder 823 clamps the protective film protruding from a corner of the positioning table 811, with the joint cooperation of the cover glass X-axis linear module 52, the cover glass Y-axis linear module 53, and the cover glass Z-axis linear module 54, first, the glass 24 is sucked from the positioning table 811 and lifted until it is higher than the fixed limit wheel 8122. Since the film tearing jaw cylinder 823 clamps a corner of the protective film, during the lifting process, an opening will be formed between the protective film and the glass 24. Then, the glass 24 is driven to translate in the direction of the glass detection unit 9. Since the film tearing jaw cylinder 823 still clamps a corner of the protective film, the protective film is completely peeled off during the translation process; when the glass 24 reaches directly above the glass detection unit 9, the glass detection unit 9 identifies the positions of the four corners of the glass 24 from bottom to top. At this time, the cover glass picking unit 5 will adjust the angle and position of the glass 24 according to the position information of the four corners of the housing collected by the housing detection unit 4 and the position information of the four corners of the glass 24 collected by the glass detection unit 9, so as to accurately install the glass 24 into the housing 23 at the cover glass station 2D; the angle of the glass 24 is adjusted by the angle adjustment motor 55.

[0136] Furthermore, the diagonal line of the positioning table 811 pointing to the film clamping mechanism 82 is placed parallel to the X-axis linear module 52 of the pick-up cover glass; when the pick-up cover glass unit 5 drives the glass 24 to translate, the protective film at the bottom can be peeled off along the diagonal line parallel to the X-axis linear module 52 of the pick-up cover glass, not only with more uniform force but also good peeling effect.

[0137] Furthermore, as Figure 1 shown, it further includes a waste collection unit 22;

[0138] The film clamping mechanism 82 is arranged at a corner of the positioning table 811 close to the glass detection unit 9;

[0139] The waste collection unit 22 is arranged inside the machine table 1 and on the side of the film clamping mechanism 82 close to the glass detection unit 9, and is used to collect the peeled protective film;

[0140] When the pick-up cover glass unit 5 drives the glass 24 to translate to peel the bottom protective film, the protective film will move along with the glass 24 towards the glass detection unit 9; when the protective film is completely peeled off, the protective film will be on the side of the film clamping mechanism 82 close to the glass detection unit 9. At this time, the film clamping mechanism 82 releases the protective film, and the waste collection unit 22 collects the peeled protective film.

[0141] Furthermore, the waste collection unit 22 uses a vacuum suction device, and the material discharge port is placed upwards, which is prior art, so it will not be introduced in detail.

[0142] Furthermore, the glass detection unit 9 and the outer shell detection unit 4 are structurally symmetrical. Four vision recognition modules 47 identify the positions of the four corners of the glass 24 from bottom to top. Different from the outer shell detection unit 4, the vision recognition modules 47 of the glass detection unit 9 must be equipped with light sources.

[0143] Furthermore, as Figure 1 shown, it further includes a backlight module cleaning unit 11, which is used to clean the surface of the backlight module inside the outer shell 23 to ensure the product quality after covering the glass;

[0144] As Figure 13 shown, a cleaning station 2B is further arranged between the loading station 2A and the cover glass station 2D on the turntable;

[0145] The backlight module cleaning unit 11 includes a cleaning bracket 111, a support mechanism 112 arranged on the cleaning bracket 111 and below the cleaning station 2B, and a cleaning mechanism 113 arranged on the cleaning bracket 111 and above the cleaning station 2B;

[0146] After the turntable moves the outer shell 23 from the loading station 2A to the cleaning station 2B, the support mechanism 112 first supports the bottom of the cleaning station 2B or both ends of the outer shell 23 on the cleaning station 2B to prevent the turntable from tilting due to the downward pressure of the cleaning mechanism 113 during the cleaning process. When the cleaning mechanism 113 finishes cleaning, the turntable moves the outer shell 23 from the cleaning station 2B to the cover glass station 2D.

[0147] Furthermore, as Figure 14 shown, the cleaning mechanism 113 includes a horizontally placed cleaning linear module 1131, a slide table 1132 arranged at the driving end of the cleaning linear module 1131, a floating frame 1133 vertically slidably arranged on the slide table 1132, a groove-shaped cam 1134 with a planar structure and parallel to the cleaning linear module 1131, a track groove 1135 arranged on the groove-shaped cam 1134 with a lower middle and higher ends, a roller arranged on the floating frame 1133 and located in the track groove 1135, a cleaning frame 1136 arranged at the bottom of the floating frame 1133 and perpendicular to the cleaning linear module 1131, and a dust sticking roller 1137 rotatably arranged on the cleaning frame 1136 for cleaning the surface of the backlight module.

[0148] During operation: The cleaning linear module 1131 drives the slide table 1132 to drive the floating frame 1133 to translate. Since the roller on the floating frame 1133 is arranged in the track groove 1135 of the groove-shaped cam 1134 and the track groove 1135 has a lower middle and higher ends, the floating frame 1133 will drive the cleaning frame 1136 to descend during the initial translation until the dust sticking roller 1137 contacts one end of the backlight module in the outer shell 23. At this time, since the middle part of the track groove 1135 is a straight line segment, the cleaning frame 1136 moves horizontally, and the dust and other particles on the surface of the backlight module are cleaned by the dust sticking roller 1137. When the dust sticking roller 1137 moves to the other end of the backlight module in the outer shell 23, since the track groove 1135 is in an inclined section, the cleaning frame 1136 is driven to rise to complete the cleaning.

[0149] The present invention adopts the method of linear module drive + groove-shaped cam, enabling the floating frame 1133 to rise and fall during translation, which not only saves the Z-axis linear module and reduces costs, but also has a simple structure and high precision.

[0150] Furthermore, as Figure 14 shown, an elastic component 1138 is arranged between the floating frame 1133 and the cleaning frame 1136, which not only plays a buffering role, but also ensures that the dust sticking roller 1137 is in close contact with the surface of the backlight module, effectively removing dust and other particles on the surface of the backlight module.

[0151] In this embodiment, as Figure 13As shown, there are two support mechanisms 112, which are used to support the two bottom ends of the outer shell 23 at the cleaning station 2B, and include a horizontally placed support plate 1121, a support cylinder 1122 for driving the lifting of the support plate 1121, and a guiding component that plays a guiding role during the lifting process of the support plate 1121.

[0152] Further, as Figure 1 shown, it further includes a backlight module detection unit 12 and a defective product discharging unit 13;

[0153] The backlight module detection unit 12 is located on one side of the cleaning station 2B and is used to perform power-on detection on the cleaned backlight module. As Figure 15 shown, it includes a backlight module detection manipulator 121, a power-on mechanism 122 respectively arranged at the driving end of the backlight module detection manipulator 121, a visual positioning module 123 and a visual detection module; the visual positioning module 123 is used to identify the power-on position of the backlight module in the outer shell 23 at the cleaning station 2B; the power-on mechanism 122 is used to power on the backlight module in the outer shell 23 at the cleaning station 2B; the visual detection module (not marked in the figure) is located directly above the cleaning station 2B and is used to check the powered-on backlight module;

[0154] As Figure 13 shown, a defective product discharging station 2C is further arranged between the cleaning station 2B and the cover glass station 2D on the turntable;

[0155] As Figure 1 shown, the defective product discharging unit 13 is located on one side of the defective product discharging station 2C and includes a defective product discharging conveyor line 131 and a defective product discharging manipulator 132; when the visual detection module detects defects such as black spots on the backlight module, the defective product discharging manipulator 132 places the outer shell 23 with the defective backlight module from the defective product discharging station 2C onto the defective product discharging conveyor line 131 and flows out to ensure product quality.

[0156] Further, the outer shell loading manipulator 32, the defective product discharging manipulator 132 and the cover glass discharging manipulator 101 have the same structure, and all include a robotic arm and a jaw assembly arranged at the driving end of the robotic arm; the glass loading manipulator 7 is different from the above-mentioned manipulators in that: a suction cup assembly is arranged at the driving end of the robotic arm; since the jaw assembly and the suction cup assembly are both prior arts, their structures will not be introduced in detail.

[0157] Further, as Figure 1 shown, it further includes an easy tear sticker pasting unit 14, which is particularly suitable for occasions where the protective film does not protrude from the bottom of the glass 24;

[0158] The tearable sticker pasting unit 14 is used to paste a tearable sticker 25 at a corner of the bottom protective film of the glass 24, facilitating the clamping mechanism 82 to clamp the tearable sticker 25 and cooperate with the pick-up cover glass unit 5 to peel off the protective film at the bottom of the glass 24.

[0159] Furthermore, as Figures 16-17 shown, the tearable sticker pasting unit 14 includes a tearable sticker feeding mechanism 141 and a tearable sticker pasting manipulator 142;

[0160] The tearable sticker feeding mechanism 141 includes a tearable sticker feeding bracket 1411, a tearable sticker unwinding roller 1412, a tearable sticker winding roller 1413 respectively arranged on the tearable sticker feeding bracket 1411, and a plurality of tearable sticker guiding rollers 1414 located between the tearable sticker unwinding roller 1412 and the tearable sticker winding roller 1413; a tearable sticker picking position 1415 is formed between two of the plurality of tearable sticker guiding rollers 1414;

[0161] The tearable sticker pasting manipulator 142 includes a tearable sticker translation linear module 1421 located below the tearable sticker picking position 1415 and placed parallel to the tearable sticker guiding rollers 1414, a tearable sticker Z-axis linear module 1422 vertically arranged at the driving end of the tearable sticker linear module, a tearable sticker rotating motor 1423 horizontally arranged at the driving end of the tearable sticker Z-axis linear module and placed perpendicular to the tearable sticker translation linear module 1421, a tearable sticker clamping jaw cylinder 1424 arranged at the driving end of the tearable sticker rotating motor 1423 for clamping the tearable sticker, and a tearable sticker vision module 1425 located at the driving end of the tearable sticker clamping jaw cylinder 1424 for identifying the tearable sticker;

[0162] During operation: The tape with the tearable sticker 25 adhered to the tearable sticker unwinding roller 1412 passes through a plurality of tearable sticker guiding rollers 1414 and then connects to the tearable sticker winding roller 1413; when the tape with the tearable sticker 25 passes through the tearable sticker picking position 1415, the tearable sticker translation linear module 1421, the tearable sticker Z-axis linear module 1422 and the tearable sticker rotating motor 1423 cooperate together. The tearable sticker clamping jaw cylinder 1424 clamps the non-adhesive tearing position of a single tearable sticker 25, removes the tearable sticker 25 from the tape and pastes it at a corner of the bottom protective film of the glass 24 for subsequent film tearing; the tearable sticker vision module 1425 is used to identify the position of the tearable sticker 25 on the tape and the position of a corner of the protective film, facilitating the accurate picking and pasting of the tearable sticker by the tearable sticker clamping jaw cylinder 1424 and improving the accuracy.

[0163] Furthermore, as Figure 1 shown, it further includes a moving platform 15;

[0164] One end of the moving platform 15 is located at the picking position of the pick-up cover glass unit 5, and the other end is located at the tearable sticker pasting unit 14;

[0165] The film tearing unit 8 is arranged on the moving platform 15 and can reciprocate between the material taking position of the material taking cover glass unit 5 and the easy-to-tear sticker pasting unit 14.

[0166] During operation: The moving platform 15 first drives the positioning platform 81 to be at the easy-to-tear sticker pasting unit 14. After the easy-to-tear sticker pasting unit 14 pastes the easy-to-tear sticker 25 to a corner of the bottom protective film of the glass 24, it then drives the positioning platform 81 to be at the material taking position of the material taking cover glass unit 5, which not only facilitates the material taking of the material taking cover glass unit 5 but also can cooperate with the material taking cover glass unit 5 to peel off the protective film at the bottom of the glass 24.

[0167] In the present invention, the moving platform 15 drives the film tearing unit 8 to reciprocate between the material taking position of the material taking cover glass unit 5 and the easy-to-tear sticker pasting unit 14, which can also avoid interference between the material taking cover glass unit 5 and the easy-to-tear sticker pasting unit 14 and avoid risks.

[0168] Furthermore, as Figure 1 shown, it further includes a glass calibration unit 16 and a calibrated blanking manipulator 17;

[0169] The glass calibration unit 16 is used to calibrate and position the glass 24;

[0170] The calibrated blanking manipulator 17 is used to send the glass 24 after calibration and positioning from the glass calibration unit 16 to the easy-to-tear sticker pasting unit 14 to paste the easy-to-tear sticker 25 and finally place it on the positioning platform 81.

[0171] During operation: It is necessary to first paste the easy-to-tear sticker 25 at a corner of the bottom of the protective film, and then place the glass 24 on the positioning platform 81 for subsequent film tearing treatment; in order to improve the working efficiency of the easy-to-tear sticker pasting unit 14 and enable the easy-to-tear sticker pasting manipulator 142 to quickly identify the position of a corner of the protective film, the glass calibration unit 16 is specially designed to ensure that the glass 24 taken by the calibrated blanking manipulator 17 from the glass calibration unit 16 is in the same position.

[0172] Among them, the glass calibration unit 16 is a prior art and is similar in structure to the positioning platform 81, so its structure will not be introduced in detail; the calibrated blanking manipulator 17 is also similar in structure to the material taking cover glass unit 5. The difference is that it does not require a Y-axis linear module, and since the accuracy requirement is not too high, the Z-axis linear module can use a telescopic cylinder, and the angle adjustment motor 55 can use a rotary cylinder;

[0173] During operation: After sucking the glass 24 from the glass calibration unit 16, it needs to be rotated by a certain angle (the same as the inclination angle of the positioning platform 81) through the rotary cylinder and then sent to the easy-to-tear sticker pasting unit 14 to paste the easy-to-tear sticker 25 at a corner of the bottom of the protective film.

[0174] Furthermore, as Figure 1As shown, it further includes a glass cleaning unit 18 and a cleaning blanking manipulator 19;

[0175] As Figure 7 shown, the glass cleaning unit 18 includes a cleaning conveyor line 181 and a cleaning machine 182 provided on the cleaning conveyor line 181 for cleaning the glass 24;

[0176] The cleaning blanking manipulator 19 is used to place the cleaned glass 24 from the cleaning conveyor line 181 onto the glass calibration unit 16.

[0177] During operation: The glass loading manipulator 7 places the grabbed glass 24 onto the cleaning conveyor line 181, and it is cleaned by the cleaning machine 182 provided on the cleaning conveyor line 181 to remove impurities such as dust on the surface of the glass 24, and then the cleaned glass 24 is placed from the cleaning conveyor line 181 onto the glass calibration unit 16 by the cleaning blanking manipulator 19.

[0178] Further, as Figure 1 shown, it further includes a translation module 20;

[0179] One end of the translation module 20 is located at the blanking position of the cleaning blanking manipulator 19, and the other end is located at the loading position of the calibration blanking manipulator 17;

[0180] The glass calibration unit 16 is provided on the translation module 20 and can reciprocate between the blanking position of the cleaning blanking manipulator 19 and the loading position of the calibration blanking manipulator 17.

[0181] In the present invention, the translation module 20 drives the glass calibration unit 16 to reciprocate between the blanking position of the cleaning blanking manipulator 19 and the loading position of the calibration blanking manipulator 17, which can avoid interference between the cleaning blanking manipulator 19 and the calibration blanking manipulator 17 and avoid risks.

[0182] Further, as Figure 1 shown, it further includes a pressing unit 21;

[0183] The pressing unit 21 is provided on the cover glass blanking conveyor line 102 and is used to perform a pressing process on the glass 24 and the housing 23 so that the glass 24 is installed in place; since the pressing unit 21 is a prior art, its structure will not be introduced in detail;

[0184] Further, as Figures 19-20As shown in the figure, the cover glass blanking conveyor line 102 adopts an equidistant conveyor line, including an equidistant conveyor table 1021, a plurality of blanking tables 1022 evenly spaced and arranged in a straight line on the equidistant conveyor table 1021, a slide rail assembly 1023 horizontally arranged on the blanking table 1022 and passing through a plurality of blanking tables 1022, a plurality of lifting assemblies 1024 slidably arranged on the slide rail assembly 1023 and corresponding to the number and spacing of the blanking tables 1022, a plurality of connecting rods 1025 horizontally placed for connecting adjacent lifting assemblies 1024, and a conveying linear module 1026 for driving one of the lifting assemblies 1024 to translate;

[0185] A cross-shaped avoidance groove 10221 is provided on the blanking table 1022;

[0186] The lifting assembly 1024 includes a slide seat 10241 slidably arranged on the slide rail assembly 1023, a blanking lifting cylinder 10242 vertically arranged on the slide seat 10241, and a blanking lifting plate 10243 horizontally arranged at the driving end of the blanking lifting cylinder 10242 and in a cross shape;

[0187] During operation: Since the five lifting assemblies 1024 are slidably arranged on the slide rail assembly 1023 and connected by four connecting rods 1025, they can be synchronously translated by the drive of the conveying linear module 1026. Under the drive of the blanking lifting cylinder 10242, the outer shell 23 on the blanking table 1022 can be lifted through the avoidance groove 10221 by the blanking lifting plate 10243 at the same time, moved to the next blanking table 1022 and then dropped at the same time, realizing equidistant conveying. Compared with the existing roller conveyor line, it not only has high precision but also smooth conveying, avoiding the deviation of the glass 24 installed on the outer shell 23 due to vibration during the conveying process.

[0188] The above is only a specific application example of the present invention and does not constitute any limitation to the protection scope of the present invention. Any technical solutions formed by equivalent transformation or equivalent substitution fall within the scope of the protection of the present invention.

Claims

1. A high-precision cover glass production line for liquid crystal screens, characterized in that: It includes a machine platform, a turntable unit, a housing loading unit, a housing detection unit, a cover glass picking unit, a glass feeding unit, a glass loading manipulator, a film tearing unit, a glass detection unit, and a cover glass unloading unit, which are respectively arranged on the machine platform; The turntable unit includes a horizontally placed turntable and an intermittent mechanism for driving the turntable to move intermittently; on the turntable, a loading station, a cover glass station, and an unloading station are respectively arranged at uniform intervals in the circumferential direction, and a suction cup assembly for fixing the housing is arranged at each station; The housing loading unit includes a loading conveyor line 31 for conveying the housing, a positioning mechanism arranged on the magnetic wheel conveyor line for on-line positioning of the housing, a lifting mechanism arranged on the magnetic wheel conveyor line for lifting the positioned housing, and a housing loading manipulator for placing the positioned housing on the loading station; The housing detection unit is located directly above the cover glass station and is used to identify the positions of the four corners of the housing on the cover glass station from top to bottom; The glass feeding unit is used to convey the storage box storing the glass to the picking position of the glass loading manipulator and can output the empty box; The glass loading manipulator is used to pick up the glass piece by piece from the storage box for loading; The film tearing unit includes a positioning platform and a film clamping mechanism; the positioning platform is used to position the glass and is placed obliquely in the horizontal direction; the film clamping mechanism is located at one corner of the positioning platform and is used to clamp the protective film at one corner of the bottom of the glass; The cover glass picking unit is used to pick up the glass from the positioning platform, peel off the protective film at the bottom of the glass in cooperation with the film clamping mechanism, then send it to the glass detection unit to detect and adjust the angle and position of the glass, and finally install it into the housing at the cover glass station; The glass detection unit is located inside the machine platform and is used to identify the positions of the four corners of the glass from bottom to top; The cover glass unloading unit includes a cover glass unloading conveyor line and a cover glass unloading manipulator; the cover glass unloading manipulator is used to pick up the housing with the glass installed from the unloading station and place it on the cover glass unloading conveyor line.

2. The high-precision cover glass production line for liquid crystal screens according to claim 1, wherein: It also includes a backlight module cleaning unit; A cleaning station is also arranged between the loading station and the cover glass station on the turntable; The backlight module cleaning unit includes a cleaning bracket, a support mechanism arranged on the cleaning bracket and located below the cleaning station, and a cleaning mechanism arranged on the cleaning bracket and located above the cleaning station; The cleaning mechanism includes a horizontally placed cleaning linear module, a slide table arranged at the driving end of the cleaning linear module, a floating frame slid vertically on the slide table, a groove-shaped cam arranged in a planar structure and parallel to the cleaning linear module, a track groove with a low middle and high ends arranged on the groove-shaped cam, a roller arranged on the floating frame and located in the track groove, a cleaning frame arranged at the bottom of the floating frame and perpendicular to the cleaning linear module, and a dust sticking roller rotatably arranged on the cleaning frame for cleaning the surface of the backlight module; an elastic component is arranged between the floating frame and the cleaning frame; The support mechanism has a lifting function and is used to support the bottom of the cleaning station or both ends of the housing on the cleaning station.

3. The high-precision cover glass production line for liquid crystal screens according to claim 2, characterized in that: It also includes a backlight module detection unit and a defective product unloading unit; The backlight module detection unit is located on one side of the cleaning station and is used to conduct power-on detection on the cleaned backlight module. It includes a backlight module detection manipulator, a power-on mechanism, a vision positioning module, and a vision detection module respectively arranged at the driving end of the backlight module detection manipulator. The vision positioning module is used to identify the power-on position of the backlight module inside the housing at the cleaning station. The power-on mechanism is used to power on the backlight module inside the housing at the cleaning station. The vision detection module is located directly above the cleaning station and is used to inspect the powered-on backlight module. There is also a defective product discharging station arranged on the turntable between the cleaning station and the cover glass station. The defective product discharging unit is located on one side of the defective product discharging station and includes a defective product discharging conveyor line and a defective product discharging manipulator. The defective product discharging manipulator is used to place the housing with the defective backlight module from the defective product discharging station onto the defective product discharging conveyor line for outflow.

4. The high-precision cover glass production line for liquid crystal screens according to claim 1, characterized in that: It also includes an easy tear sticker pasting unit. The easy tear sticker pasting unit is used to paste an easy tear sticker at a corner of the bottom protective film of the glass, facilitating the clamping mechanism to clamp the easy tear sticker and cooperate with the pick-up cover glass unit to peel off the protective film at the bottom of the glass.

5. The high-precision cover glass production line for liquid crystal screens according to claim 4, characterized in that: It also includes a mobile platform. One end of the mobile platform is located at the pick-up position of the pick-up cover glass unit, and the other end is located at the easy tear sticker pasting unit. The film peeling unit is arranged on the mobile platform and can reciprocate between the pick-up position of the pick-up cover glass unit and the easy tear sticker pasting unit.

6. The high-precision cover glass production line for liquid crystal screens according to claim 5, wherein: It also includes a glass alignment unit and an alignment discharging manipulator. The glass alignment unit is used to align and position the glass. The alignment discharging manipulator is used to send the aligned and positioned glass from the glass alignment unit to the easy tear sticker pasting unit to paste the easy tear sticker and finally place it on the positioning platform.

7. The high-precision cover glass production line for liquid crystal screens according to claim 6, wherein: It also includes a glass cleaning unit and a cleaning discharging manipulator. The glass cleaning unit includes a cleaning conveyor line and a cleaning machine arranged on the cleaning conveyor line for cleaning the glass. The cleaning discharging manipulator is used to place the cleaned glass from the cleaning conveyor line onto the glass alignment unit.

8. The high-precision cover glass production line for liquid crystal screens according to claim 7, wherein: It also includes a translation module. One end of the translation module is located at the discharging position of the cleaning discharging manipulator, and the other end is located at the loading position of the alignment discharging manipulator. The glass alignment unit is arranged on the translation module and can reciprocate between the discharging position of the cleaning discharging manipulator and the loading position of the alignment discharging manipulator.

9. The high-precision cover glass production line for liquid crystal screens according to any one of claims 1-8, characterized in that: It also includes a waste collection unit. The waste collection unit is arranged inside the machine tool and is located between the pick-up position of the pick-up cover glass unit and the glass detection unit, and is used to collect the peeled protective film.

10. The high-precision cover glass production line for liquid crystal screens according to claim 1, characterized in that: It also includes a pressing unit. The pressing unit is arranged on the cover glass discharging conveyor line and is used to press the glass and the housing.

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