Visual positioning pre-laminating device and curved surface screen laminating equipment

Abstract

The utility model belongs to the technical field of mobile phone accessory processing, and particularly relates to a visual positioning pre-laminating device and curved surface screen laminating equipment. The visual positioning pre-laminating device comprises a positioning structure which comprises a visual positioning mechanism, a first material carrying table and a second material carrying table; the material moving structure is used for picking up a first material sheet from the first material carrying table, and the visual positioning mechanism is used for photographing to obtain first position information of the first material sheet picked up by the material moving structure; the visual positioning mechanism is further used for photographing to obtain second position information of a second material sheet on the second material carrying table; and the control structure is used for controlling the movement of the material moving structure according to the first position information and the second position information. Compared with the prior art, the visual positioning mechanism can ensure the alignment and positioning precision between the first material sheet and the second material sheet, and improves the pre-fitting precision of the first material sheet and the second material sheet, so that the first material sheet and the second material sheet can be accurately fitted in the subsequent pressing process, and the fitting precision and quality are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mobile phone accessory processing, and in particular relates to a visual positioning pre-bonding device and a curved surface screen bonding device. Background Art

[0002] At present, curved screen mobile phones are becoming more and more prominent in the mobile phone market and have become high-end models that are highly anticipated and sought after. In the manufacturing process of curved screens, the full bonding technology of optical adhesive film (OCA) and mobile phone cover is widely used to provide more excellent visual effects and tactile experience.

[0003] When the OCA full lamination equipment is used for processing, manual or mechanical positioning is generally adopted. According to the set moving path, the robot first picks up the cover plate, then moves the cover plate to the position of the diaphragm, and laminates the cover plate to the diaphragm to complete the pre-lamination of the diaphragm and the cover plate, and then moves the cover plate and the diaphragm as a whole to the pressing mold, and the diaphragm and the cover plate are pressed as a whole through the pressing mold.

[0004] However, the alignment accuracy between the cover plate and the diaphragm is low through mechanical positioning or manual positioning. When the bonding accuracy requirement is relatively high, this positioning method will cause the alignment between the cover plate and the diaphragm to deviate after pre-bonding, thereby affecting the subsequent pressing accuracy and pressing quality, and easily causing poor bonding between the mobile phone cover plate and the diaphragm. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide a visual positioning pre-lamination device, aiming to solve the problem of how to improve the lamination accuracy and lamination quality.

[0006] To achieve the above purpose, the technical solution adopted in this application is:

[0007] In a first aspect, a visual positioning pre-laminating device is provided for pre-laminating a first web and a second web, the visual positioning pre-laminating device comprising:

[0008] The positioning structure comprises a visual positioning mechanism, a first loading platform for carrying the first material sheet, and a second loading platform arranged at a distance from the first loading platform and for carrying the second material sheet; the visual positioning mechanism is located above the first loading platform and the second loading platform, and the first loading platform and the second loading platform are both slidably arranged along a predetermined path;

[0009] a material transfer structure for picking up the first material sheet from the first material loading platform, and the visual positioning mechanism for taking a photo to obtain first position information of the first material sheet after being picked up by the material transfer structure; the visual positioning mechanism is also used to take a photo to obtain second position information of the second material sheet located on the second material loading platform; and

[0010] The control structure controls the movement of the material transfer structure according to the first position information and the second position information, so that the material transfer structure pre-bonds the first material sheet to the second material sheet.

[0011] In some embodiments, the visual positioning mechanism includes two first cameras arranged at intervals and two second cameras arranged at intervals; the two first cameras respectively photograph the first sheet and the second sheet along a first direction, and the two second cameras respectively photograph the first sheet and the second sheet along a second direction; the first direction is perpendicular to the second direction.

[0012] In some embodiments, the visual positioning mechanism also includes a first adjustment component and a second adjustment component, the first adjustment component is connected to the first camera and adjusts the position of the first camera along the first direction, and the second adjustment component is connected to the second camera and adjusts the position of the second camera along the second direction.

[0013] In some embodiments, the first adjustment component includes a first base, a first adjustment rod, and a first slide slidably set on the first base and connected to the first camera, the two ends of the first adjustment rod are respectively connected to the first base and the first slide, and are used to drive the first slide to slide along the first direction; and / or the second adjustment component includes a second base, a second adjustment rod, and a second slide slidably set on the second base and connected to the second camera, the two ends of the second adjustment rod are respectively connected to the second base and the second slide, and are used to drive the second slide to slide along the second direction.

[0014] In some embodiments, the material moving structure includes a material moving gantry and a material moving robot slidably disposed on the material moving gantry, the material moving gantry is adjacent to the first loading platform and the second loading platform, and the material moving robot is used to pick up the first material sheet and / or the second material sheet; the material moving robot includes a material moving slider slidably disposed on the material moving gantry, a lifting mechanism disposed on the material moving slider, a rotating motor connected to the lifting mechanism, and a material moving adsorption plate connected to the rotating motor.

[0015] In some embodiments, the positioning structure also includes a first lead screw located below the visual positioning mechanism and rotatably arranged, a first slider connected to the first lead screw, and a first drive motor for driving the first lead screw to rotate, the first slider is threadedly connected to the first lead screw, and the first loading platform is connected to the first slider.

[0016] In some embodiments, the second loading platform includes a carrying plate with a limiting groove and a limiting adsorption plate at least partially located in the limiting groove and used to adsorb the second material sheet, and the carrying plate can be lowered a predetermined distance relative to the limiting adsorption plate so that the limiting adsorption plate is exposed at the limiting groove; the second loading platform also includes a carrying bottom plate arranged relative to the carrying plate and a lifting drive connected to the carrying bottom plate and used to drive the carrying plate to rise and fall.

[0017] In some embodiments, the positioning structure also includes a second lead screw located below the visual positioning mechanism and rotatably arranged, a second slider connected to the second lead screw, and a second drive motor for driving the second lead screw to rotate, the second slider is threadedly connected to the second lead screw, and the supporting base plate is connected to the second slider.

[0018] In some embodiments, the visual positioning pre-lamination device also includes a film tearing structure, which includes a film tearing gantry arranged on the sliding path of the second loading platform, a film tearing robot slidably arranged on the film tearing gantry, and a film tearing drive assembly for driving the film tearing robot to slide.

[0019] In a second aspect, a curved screen-mounting device is provided, which includes the visual positioning pre-mounting device. The curved screen-mounting device also includes a pressing mold, and the pressing mold is used to press the first material sheet and the second material sheet.

[0020] The beneficial effect of the present application is that the control structure controls the movement of the material transfer structure according to the first position information and the second position information. For example, the coordinate position of the first position information under the second position information is analyzed based on the second position information, and the movement path of the material transfer structure is calculated, and then the material transfer structure is controlled to move to the second sheet, so that the first sheet is pre-bonded and bonded to the second sheet. Since the first sheet and the second sheet are both positioned by the visual positioning mechanism, the visual positioning mechanism can ensure the alignment and positioning accuracy between the two, and improve the accuracy of the pre-bonding of the first sheet and the second sheet, so that in the subsequent lamination process, the first sheet and the second sheet can be accurately bonded, and the bonding accuracy and quality can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or exemplary technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a visual positioning pre-lamination device provided in an embodiment of the present application;

[0023] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of a visual positioning mechanism of a visual positioning pre-laminating device;

[0024] Figure 3 yes Figure 1 A schematic diagram of the three-dimensional structure of the second loading platform of the visual positioning pre-lamination device;

[0025] Figure 4 yes Figure 3 An exploded schematic diagram of the second loading platform;

[0026] Figure 5 yes Figure 1 A schematic diagram of the three-dimensional structure of a material transfer structure of a visual positioning pre-lamination device;

[0027] Figure 6 yes Figure 1 Schematic diagram of the three-dimensional structure of the film tearing structure of the visual positioning pre-lamination device.

[0028] Among them, the reference numerals in the figure are:

[0029] 100, visual positioning pre-laminating device; 10, positioning structure; 11, first loading platform; 12, second loading platform; 13, visual positioning mechanism; 30, material transfer structure; 31, material transfer gantry; 32, material transfer manipulator; 51, pressing mold; 52, frame; 40, film tearing structure; 130, release film; 14, first slider; 15, first lead screw; 131, first camera; 132, second camera; 110, first adjustment component; 101, first slide seat; 102, first base; 103, first adjustment rod; 20 2. Second slide; 201. Second base; 203. Second adjustment rod; 221. Carrying plate; 222. Limiting adsorption plate; 223. Carrying bottom plate; 224. Lifting driver; 211. Second lead screw; 212. Second slider; 213. Second drive motor; 33. Y-axis moving mechanism; 323. Material transfer adsorption plate; 321. Lifting mechanism; 324. Material transfer slider; 322. Rotating motor; 41. Film tearing gantry; 42. Film tearing manipulator; 43. Film tearing drive assembly; 44. Waste box; 23. Limiting slot; DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "first" and "second" are only used for the purpose of convenience of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0032] See also Figures 1 to 3 The embodiment of the present application provides a visual positioning pre-laminating device 100 for pre-laminating a first sheet and a second sheet, wherein the first sheet can be a cover plate on a mobile phone, and the second sheet can be a film that needs to be pressed onto the cover plate. In the embodiment of the present application, the first sheet can be a cover plate on a mobile phone, and the second sheet can be an optical adhesive film, which has a certain degree of softness. In other embodiments, the first sheet and the second sheet can also be other structural parts, which are not limited here and can be selected according to actual conditions.

[0033] The visual positioning pre-lamination device 100 includes a positioning structure 10, a material moving structure 30 and a control structure.

[0034] The positioning structure 10 includes a visual positioning mechanism 13, a first loading platform 11 for carrying a first material sheet, and a second loading platform 12 arranged at an interval from the first loading platform 11 and for carrying a second material sheet; the visual positioning mechanism 13 is located above the first loading platform 11 and the second loading platform, and the first loading platform 11 and the second loading platform 12 are both slidably arranged along a predetermined path; it can be understood that the first loading platform 11 and the second loading platform 12 slide to the corresponding loading positions respectively, and load the first material sheet and the second material sheet respectively, and then the first loading platform 11 and the second loading platform 12 slide to the bottom of the visual positioning mechanism 13 for visual positioning. It can be understood that the upper surface of the first loading platform 11 and the upper surface of the second loading platform 12 are both flatly arranged, and the first material sheet and the second material sheet are respectively flatly arranged on the first loading platform 11 and the second loading platform 12.

[0035] The material transfer structure 30 is used to pick up the first material sheet from the first material loading platform 11, and the visual positioning mechanism 13 is used to take a photo to obtain the first position information of the first material sheet after being picked up by the material transfer structure 30; the visual positioning mechanism 13 is also used to take a photo to obtain the second position information of the second material sheet located on the second material loading platform 12. It can be understood that the visual positioning mechanism 13 takes a photo of the first material sheet picked up by the material transfer structure 30, and analyzes and obtains the first position information of the first material sheet; the visual positioning mechanism 13 is also used to take a photo of the second material sheet located on the second material loading platform 12, and analyzes and obtains the second position information of the second material sheet.

[0036] The control structure controls the movement of the material transfer structure 30 according to the first position information and the second position information, so that the material transfer structure 30 pre-bonds the first material sheet to the second material sheet.

[0037] The control structure can be centrally installed on the visual positioning mechanism 13, or it can be installed separately as an independent component, depending on the actual situation, and there is no limitation here. The control structure controls the movement of the material transfer structure 30 according to the first position information and the second position information. For example, the coordinate position of the first position information under the second position information is analyzed based on the second position information, and the moving path of the material transfer structure 30 is calculated, and then the material transfer structure 30 is controlled to move to the second sheet, so that the first sheet is pre-bonded and bonded to the second sheet. Since the first sheet and the second sheet are both positioned by the visual positioning mechanism 13, the visual positioning mechanism 13 can ensure the alignment and positioning accuracy between the two, improve the accuracy of the pre-bonding of the first sheet and the second sheet, so that in the subsequent lamination process, the first sheet and the second sheet can be accurately bonded, and the bonding yield rate can be improved.

[0038] It can be understood that the first sheet and the second sheet are pre-bonded at the second loading platform 12, at which time the first sheet is at least partially bonded to the second sheet, and the control structure then controls the material transfer structure 30 to move the first sheet and the second sheet as a whole from the second loading platform 12 to the laminating mold 51, thereby improving the overall laminating accuracy of the first sheet and the second sheet.

[0039] Optionally, the first loading platform 11 and the second loading platform 12 can both slide reciprocatingly along the Y direction.

[0040] In some embodiments, the visual positioning mechanism 13 includes two first cameras 131 arranged at intervals and two second cameras 132 arranged at intervals; the two first cameras 131 respectively photograph the first sheet and the second sheet along the first direction, and the two second cameras 132 respectively photograph the first sheet and the second sheet along the second direction; the first direction is perpendicular to the second direction. Optionally, the first camera 131 and the second camera 132 can be industrial cameras.

[0041] It can be understood that the first direction is the X direction, and the second direction is the Y direction. The two first cameras 131 take pictures along the X direction to obtain the coordinate information of the first sheet and the second sheet, and the two second cameras 132 take pictures along the Y direction to obtain the coordinate information of the first sheet and the second sheet. It can also be understood that the first position information or the second position information includes the coordinate information in the X direction and the coordinate information in the Y direction, so that the control structure can control the material moving structure 30 to move along the X direction or the Y direction.

[0042] In some embodiments, the visual positioning mechanism 13 also includes a first adjustment component 110 and a second adjustment component, the first adjustment component 110 is connected to the first camera 131 and adjusts the position of the first camera 131 along the first direction, and the second adjustment component is connected to the second camera 132 and adjusts the position of the second camera 132 along the second direction.

[0043] It can be understood that any first camera 131 is connected to the first adjustment component 110, and any second camera 132 is connected to the second adjustment component. For first sheets and second sheets of different sizes, the first adjustment component 110 can move the position of the first camera 131 along the X direction, and the second adjustment component can move the position of the second camera 132 along the Y direction to adapt it to the size of the first sheet or the second sheet, thereby improving the convenience of use and the scope of application.

[0044] In some embodiments, the first adjustment assembly 110 includes a first base 102, a first adjustment rod 103, and a first slide 101 slidably disposed on the first base 102 and connected to the first camera 131, the two ends of the first adjustment rod 103 are respectively connected to the first base 102 and the first slide 101, and are used to drive the first slide 101 to slide along the first direction; and / or the second adjustment assembly includes a second base 201, a second adjustment rod 203, and a second slide 202 slidably disposed on the second base 201 and connected to the second camera 132, the two ends of the second adjustment rod 203 are respectively connected to the second base 201 and the second slide 202, and are used to drive the second slide 202 to slide along the second direction. In this embodiment, the first direction is the X direction, and the second direction is the Y direction.

[0045] Optionally, the first adjusting rod 103 is a threaded rod, and a first threaded hole is provided on the first slide 101. One end of the first adjusting rod 103 is screwed into the first threaded hole, and the other end of the first adjusting rod 103 is rotatably connected to the first base 102, so that by rotating the first adjusting rod 103, the first slide 101 can be driven to slide relative to the first base 102, thereby adjusting the position of the first camera 131 along the X direction.

[0046] Optionally, the second adjusting rod 203 is a threaded rod, and a second threaded hole is opened on the second slide 202. One end of the second adjusting rod 203 is screwed into the second threaded hole, and the other end of the second adjusting rod 203 is rotatably connected to the second base 201, so that by rotating the second adjusting rod 203, the second slide 202 can be driven to slide relative to the second base 201, thereby adjusting the position of the second camera 132 along the Y direction.

[0047] Optionally, the visual positioning mechanism 13 further includes a positioning plate located above the first loading platform 11 and the second loading platform 12 , and each first base 102 and each second base 201 are mounted on the positioning plate.

[0048] In some embodiments, the material transfer structure 30 includes a material transfer gantry 31 and a material transfer robot 32 slidably disposed on the material transfer gantry 31, the material transfer gantry 31 is adjacent to the first loading platform 11 and the second loading platform 12, the material transfer robot 32 is used to pick up the first material sheet and / or the second material sheet; and can pre-bond the first material sheet to the second material sheet.

[0049] The material transfer robot 32 includes a material transfer slider 324 slidably disposed on the material transfer gantry 31 , a lifting mechanism 321 disposed on the material transfer slider 324 , a rotating motor 322 connected to the lifting mechanism 321 , and a material transfer adsorption plate 323 connected to the rotating motor 322 .

[0050] It is understandable that the first material loading platform 11 and the second material loading platform 12 are located on the same side of the material transfer gantry 31, the material transfer slider 324 is connected to the material transfer gantry 31 by sliding along the X direction, and the lifting mechanism 321 drives the material transfer adsorption plate 323 to move up and down. The material transfer adsorption plate 323 can vacuum adsorb the first material sheet or the second material sheet, and after the vacuum is removed, the material transfer adsorption plate 323 can release the first material sheet or the second material sheet. It is understandable that the first position information also includes the angle information of the first material sheet, and the second position information also includes the angle information of the second material sheet. The rotating motor 322 can drive the material transfer adsorption plate 323 to rotate a corresponding angle in the horizontal plane, and the first material sheet adsorbed on the material transfer adsorption plate 323 rotates synchronously, so that the first material sheet and the second material sheet can achieve accurate angle alignment and achieve precise pre-bonding.

[0051] Optionally, the material transfer robot 32 further includes a Y-direction moving mechanism 33, which is used to drive the material transfer adsorption plate 323 to move along the Y direction. The Y-direction moving mechanism 33 is located in the lifting mechanism 321 and connected to the rotating motor 322. The Y-direction moving mechanism 33 can be a lead screw structure, so that the rotating motor 322 drives the material transfer adsorption plate 323 to move along the Y direction. The lead screw structure is a prior art and will not be described in detail here.

[0052] Optionally, the positioning plate is connected to the material transfer gantry 31 .

[0053] In some embodiments, the positioning structure 10 also includes a first lead screw 15 rotatably arranged below the visual positioning mechanism 13, a first slider 14 connected to the first lead screw 15, and a first driving motor for driving the first lead screw 15 to rotate. The first slider 14 is threadedly connected to the first lead screw 15, and the first loading platform 11 is connected to the first slider 14.

[0054] Optionally, the first drive motor can be a servo motor, which drives the first lead screw 15 to rotate, thereby realizing the linear sliding of the first slider 14 and driving the sliding of the first loading platform 11. After the first loading platform 11 slides into place, the material transfer robot 32 picks up the first material sheet, and the first camera 131 and the second camera 132 take pictures of the first material sheet on the material transfer robot 32 and obtain the first position information.

[0055] In some embodiments, the second loading platform 12 includes a carrying plate 221 with a limiting groove 23 and a limiting adsorption plate 222 at least partially located in the limiting groove 23 and used to adsorb the second material sheet, and the carrying plate 221 can be lowered by a predetermined distance relative to the limiting adsorption plate 222 so that the limiting adsorption plate 222 is exposed at the limiting groove 23; the second loading platform 12 also includes a carrying bottom plate 223 arranged relative to the carrying plate 221 and a lifting driver 224 connected to the carrying bottom plate 223 and used to drive the carrying plate 221 to rise and fall. The lifting driver 224 can be a cylinder.

[0056] Optionally, when the material moving structure 30 moves the first material sheet to above the second material sheet, the supporting plate 221 descends relative to the limiting adsorption plate 222, so that the limiting adsorption plate 222 supports the second material sheet. At the same time, the material moving structure 30 presses the first material sheet toward the limiting adsorption plate 222, thereby partially pressing and pre-bonding the first material sheet and the second material sheet, and the lifting drive 224 then drives the supporting plate 221 to reset.

[0057] Optionally, a plurality of limiting adsorption holes are also provided on the limiting adsorption plate 222, each of which is connected to a vacuum pump, and adsorbs and positions the second material sheet through the negative pressure principle, and when the material transfer structure 30 needs to move the second material sheet and the first material sheet as a whole, the vacuum pump is turned off to release the adsorption of the second material sheet.

[0058] In some embodiments, the positioning structure 10 also includes a second lead screw 211 located below the visual positioning mechanism 13 and rotatably arranged, a second slider 212 connected to the second lead screw 211, and a second driving motor 213 for driving the second lead screw 211 to rotate. The second slider 212 is threadedly connected to the second lead screw 211, and the supporting base plate 223 is connected to the second slider 212.

[0059] Optionally, the second drive motor 213 can also be a servo motor, which drives the second lead screw 211 to rotate by the second drive motor 213, thereby realizing the linear sliding of the second slider 212 and driving the sliding of the second loading platform 12. After the second loading platform 12 slides into place, the first camera 131 and the second camera 132 take pictures of the second material sheet on the material transfer robot 32 and obtain the second position information, so that the material transfer robot 32 can pre-bond the first material sheet and the second material sheet.

[0060] In some embodiments, the visual positioning pre-laminating device 100 also includes a film tearing structure 40, which includes a film tearing gantry 41 arranged on the sliding path of the second loading platform 12, a film tearing robot 42 slidably arranged on the film tearing gantry 41, and a film tearing driving assembly 43 for driving the film tearing robot 42 to slide.

[0061] Optionally, a release film 130 is attached to the second sheet, and a tear-off sticker is provided on the edge of the release film 130. When the second loading platform 12 slides to the photographing position, it pauses under the film tearing gantry 41, and the film tearing robot 42 descends and clamps the tear-off sticker. The second loading platform 12 continues to move, so that the release film 130 is separated from the second sheet, and the second sheet is torn off. The film tearing robot 42 then slides along the film tearing gantry 41 to release the torn release film 130 into the waste box 44.

[0062] Optionally, the film-tearing driving assembly 43 may also be a lead screw structure, so as to drive the film-tearing robot 42 to move back and forth.

[0063] The present utility model also proposes a curved screen pasting device, which includes a visual positioning pre-laminating device 100. The specific structure of the visual positioning pre-laminating device 100 refers to the above embodiment. Since the present curved screen pasting device adopts all the technical solutions of all the above embodiments, it also has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0064] In some embodiments, the curved screen bonding device further includes a laminating mold 51, and the material transfer robot 32 releases the first material sheet and the second material sheet as a whole into the laminating mold 51, and the laminating mold 51 then presses the first material sheet and the second material sheet, thereby improving the laminating accuracy.

[0065] The curved screen laminating equipment further includes a frame 52, on which the visual positioning pre-laminating device 100 and the laminating mold 51 are both arranged, and a plurality of laminating molds 51 are arranged, thereby achieving continuous laminating.

[0066] The above are only optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A visual positioning pre-laminating device for pre-laminating a first sheet and a second sheet, characterized in that: The visual positioning pre-lamination device comprises: The positioning structure comprises a visual positioning mechanism, a first loading platform for carrying the first material sheet, and a second loading platform arranged at a distance from the first loading platform and for carrying the second material sheet; the visual positioning mechanism is located above the first loading platform and the second loading platform, and the first loading platform and the second loading platform are both slidably arranged along a predetermined path; a material transfer structure for picking up the first material sheet from the first material loading platform, and the visual positioning mechanism for taking a photo to obtain first position information of the first material sheet after being picked up by the material transfer structure; the visual positioning mechanism is also used to take a photo to obtain second position information of the second material sheet located on the second material loading platform; and The control structure controls the movement of the material transfer structure according to the first position information and the second position information, so that the material transfer structure pre-bonds the first material sheet to the second material sheet.

2. The visual positioning pre-bonding device according to claim 1, characterized in that: The visual positioning mechanism includes two first cameras arranged at intervals and two second cameras arranged at intervals; the two first cameras respectively photograph the first sheet and the second sheet along a first direction, and the two second cameras respectively photograph the first sheet and the second sheet along a second direction; the first direction is perpendicular to the second direction.

3. The visual positioning pre-bonding device according to claim 2, characterized in that: The visual positioning mechanism also includes a first adjustment component and a second adjustment component, the first adjustment component is connected to the first camera and adjusts the position of the first camera along the first direction, and the second adjustment component is connected to the second camera and adjusts the position of the second camera along the second direction.

4. The visual positioning pre-bonding device according to claim 3, characterized in that: The first adjustment component includes a first base, a first adjustment rod, and a first slide slidably set on the first base and connected to the first camera, the two ends of the first adjustment rod are respectively connected to the first base and the first slide, and are used to drive the first slide to slide along the first direction; and / or the second adjustment component includes a second base, a second adjustment rod, and a second slide slidably set on the second base and connected to the second camera, the two ends of the second adjustment rod are respectively connected to the second base and the second slide, and are used to drive the second slide to slide along the second direction.

5. The visual positioning pre-bonding device according to any one of claims 1 to 4, characterized in that: The material moving structure includes a material moving gantry and a material moving robot slidably arranged on the material moving gantry, the material moving gantry is adjacent to the first material loading platform and the second material loading platform, and the material moving robot is used to pick up the first material sheet and / or the second material sheet; the material moving robot includes a material moving slider slidably arranged on the material moving gantry, a lifting mechanism arranged on the material moving slider, a rotating motor connected to the lifting mechanism, and a material moving adsorption plate connected to the rotating motor.

6. The visual positioning pre-bonding device according to any one of claims 1 to 4, characterized in that: The positioning structure also includes a first lead screw located below the visual positioning mechanism and rotatably arranged, a first slider connected to the first lead screw, and a first driving motor for driving the first lead screw to rotate, the first slider is threadedly connected to the first lead screw, and the first loading platform is connected to the first slider.

7. The visual positioning pre-bonding device according to any one of claims 1 to 4, characterized in that: The second loading platform includes a carrying plate with a limiting groove and a limiting adsorption plate at least partially located in the limiting groove and used to adsorb the second material sheet. The carrying plate can be lowered a predetermined distance relative to the limiting adsorption plate so that the limiting adsorption plate is exposed at the limiting groove; the second loading platform also includes a carrying bottom plate arranged relative to the carrying plate and a lifting drive connected to the carrying bottom plate and used to drive the carrying plate to rise and fall.

8. The visual positioning pre-bonding device according to claim 7, characterized in that: The positioning structure also includes a second lead screw located below the visual positioning mechanism and rotatably arranged, a second slider connected to the second lead screw, and a second drive motor for driving the second lead screw to rotate, the second slider is threadedly connected to the second lead screw, and the supporting base plate is connected to the second slider.

9. The visual positioning pre-bonding device according to any one of claims 1 to 4, characterized in that: The visual positioning pre-lamination device also includes a film tearing structure, which includes a film tearing gantry arranged on the sliding path of the second loading platform, a film tearing robot slidably arranged on the film tearing gantry, and a film tearing driving assembly for driving the film tearing robot to slide.

10. A curved screen device, characterized in that: It comprises the visual positioning pre-laminating device as described in any one of claims 1 to 9, and the curved screen laminating equipment also comprises a pressing mold, and the pressing mold is used to press the first material sheet and the second material sheet.

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