Automatic mobile phone shell packaging device based on AI digital twin factory

Abstract

The invention relates to an automatic mobile phone shell packaging device based on an AI digital twinning factory, which comprises a rack and a mobile phone shell conveying belt continuously penetrating through the inner space of the rack, and further comprises a plastic support feeding conveying line, the visual positioning system is arranged in the rack and is used for identifying the mobile phone shells on the mobile phone shell conveying belt and the plastic supports on the assembly positions; a multi-axis movement mechanism; the pickup actuator is mounted at the moving tail end of the multi-axis moving mechanism and used for executing grabbing and releasing operation according to the identification information; and the finished product transferring mechanism is used for outputting the assembled plastic support to the mobile phone shell conveying belt. According to the automatic packaging device, through the design that the mobile phone shell conveying belt continuously penetrates through the rack, the automatic packaging device can be directly integrated on the premise of not cutting off and not transforming an original production line, a unique transformation mode of penetrating but not breaking is formed, and therefore the physical and functional continuity of the original production line is kept; and the reconstruction difficulty, the engineering complexity and the comprehensive cost of automatic upgrading are reduced.

Description

Technical Field

[0001] This invention relates to the field of mobile phone case packaging equipment technology, specifically to an automated mobile phone case packaging device based on an AI digital twin factory. Background Technology

[0002] With the booming development of the global consumer electronics market and the rapid iteration of smartphones, market demand has exploded, giving rise to a small-batch, multi-batch production model. Against this backdrop, traditional manual mobile phone packaging methods can no longer meet the industry's requirements for high efficiency, high precision, and low cost. Companies face multiple pressures: improving packaging efficiency, ensuring quality, and controlling costs. Therefore, upgrading existing manual production lines to automated production lines has become an inevitable trend in the industry.

[0003] Currently, the mainstream automation upgrade solutions in the industry mostly involve "embedding" independent automation modules, which integrate functions such as robotic arms and visual positioning, into the middle of existing production lines. Essentially, this approach breaks up the originally continuous production line, carving out a section within the existing conveyor line to install new equipment. This upgrade method requires physical cutting and reconnection of existing conveyor tracks, transmission systems, and electrical wiring, making the upgrade complex, incurring high costs for companies, and hindering the implementation of automation upgrades.

[0004] To address the aforementioned issues, this invention proposes an automated mobile phone case packaging device based on an AI-powered digital twin factory. Summary of the Invention

[0005] (1) Technical problems to be solved The purpose of this invention is to overcome the shortcomings of the prior art, adapt to real-world needs, and provide an automated mobile phone case packaging device based on an AI digital twin factory to solve the aforementioned technical problems.

[0006] (2) Technical solution To achieve the objectives of this invention, the technical solution adopted is as follows: An automated mobile phone case packaging device based on an AI digital twin factory includes a frame and a mobile phone case conveyor belt that continuously passes through the internal space of the frame. It also includes: a plastic tray feeding conveyor line disposed inside the frame, having an assembly position adjacent to the mobile phone case conveyor belt; a vision positioning system disposed inside the frame for identifying mobile phone cases on the conveyor belt and plastic trays at the assembly position; a multi-axis motion mechanism disposed inside the frame; a pick-up actuator installed at the moving end of the multi-axis motion mechanism and communicatively connected to the vision positioning system for performing pick-and-place operations based on identification information; and a finished product transfer mechanism disposed inside the frame for outputting assembled plastic trays to the mobile phone case conveyor belt.

[0007] Furthermore, the plastic pallet feeding conveyor line includes a plastic pallet conveyor belt and a feeding mechanism fixedly connected to the plastic pallet conveyor belt frame.

[0008] Furthermore, the unloading mechanism includes a storage box for storing plastic trays, which is fixedly connected to the plastic tray conveyor belt frame. The storage box is open at the top and bottom so that the plastic trays fall onto the plastic tray conveyor belt under their own weight. A stop is fixedly connected to the plastic tray conveyor belt. The movable end of the stop can clamp the second-to-last layer of plastic trays through the first opening on the side of the storage box, which is used to selectively block the second-to-last layer of plastic trays.

[0009] Furthermore, the stop part includes two stop fixing blocks fixedly connected to the plastic pallet conveyor belt frame, and a same stop bidirectional threaded screw rotatably connected between the two stop fixing blocks. Two stop nut blocks are threadedly connected to the two helical sections of the stop bidirectional threaded screw, and a stop limiting rod is fixedly connected between the two stop fixing blocks. Both stop nut blocks are slidably connected to the stop limiting rod. A stop arm is fixedly connected to the surface of the stop nut block. A stop clamping block is formed on the side of the stop arm near the storage box and corresponds to the first opening. It also includes a stop motor whose output end is connected to the stop bidirectional threaded screw and drives its rotation.

[0010] Furthermore, the feeding mechanism also includes a support part, the movable end of which can support the bottom plastic tray through a second opening on the side of the storage box, for selectively blocking the bottom plastic tray; the support part includes two support fixing blocks fixedly connected to the plastic tray conveyor belt frame, the two support fixing blocks are rotatably connected to the same support bidirectional threaded screw, the two helical sections of the support bidirectional threaded screw are respectively threaded with two support nut blocks, the two support fixing blocks are fixedly connected to a support limiting rod, the two support nut blocks are slidably connected to the support limiting rod, the surface of the support nut block is fixedly connected to a support arm, the bottom of the support arm is bent toward the storage box and forms a support support body, and also includes a support motor whose output end is connected to the support bidirectional threaded screw and drives its rotation.

[0011] Furthermore, the feeding mechanism also includes an air nozzle that is fixedly connected to the surface of the storage box via a mounting base, and the air blowing end of the air nozzle points to the gap between the bottom plastic tray and the second to last plastic tray.

[0012] Furthermore, the plastic tray feeding conveyor line is erected by a feeding support at its bottom and spans across the mobile phone case conveyor belt. The two intersect in space, and the intersection forms an assembly position. The plastic tray feeding conveyor line is also provided with a plastic tray discharge position.

[0013] Furthermore, the finished product transfer mechanism includes a transfer platform at the same height as the plastic tray feeding conveyor line, as well as a pushing part and a transfer part. The pushing part pushes the plastic tray with assembled mobile phone case located at the plastic tray discharge position on the plastic tray feeding conveyor line to the transfer platform. The transfer part clamps the plastic tray on the transfer platform and sends it to the mobile phone case conveyor belt. The plastic tray feeding conveyor line and the mobile phone case conveyor belt intersect perpendicularly in space. The transfer platform is perpendicular to the plastic tray feeding conveyor line. The pushing part pushes the plastic tray vertically toward the transfer platform.

[0014] Furthermore, the pushing unit includes two pushing supports, with a pushing fixing block fixedly connected to the top of each pushing support. The same pushing screw is rotatably connected between the two pushing fixing blocks. A pushing nut block is threadedly connected to the surface of the pushing screw. A pushing limiting rod is fixedly connected between the two pushing fixing blocks. The surface of the pushing nut block is slidably connected to the surface of the pushing limiting rod. A push rod is fixedly connected to the pushing nut block via a bracket. A push block is fixedly connected to the end of the push rod. The pushing unit also includes a pushing motor whose output end is connected to the pushing screw and drives its rotation. The push rod is perpendicular to the plastic tray feeding conveyor line.

[0015] Furthermore, the transfer unit includes a transfer support, on which a horizontal linear transfer module and a vertical linear transfer module are fixedly connected and perpendicularly intersected by the movable end of the horizontal linear transfer module. A mounting plate is fixedly connected to the movable end of the vertical linear transfer module, and a transfer cylinder is fixedly connected to one side of the mounting plate. A clamping member is fixedly connected to the output end of the transfer cylinder. The clamping member includes a connecting seat fixedly connected to the output end of the transfer cylinder, and two clamping units are symmetrically arranged at the bottom of the connecting seat. Each clamping unit includes a driving unit and two clamping arms synchronously driven by the driving unit. A clamping plate is provided at the end of each clamping arm, and the two clamping plates are inclined relative to each other, forming an inverted V-shaped guide opening that is narrower at the top and wider at the bottom.

[0016] (3) Beneficial effects: A. In this invention, by designing the mobile phone case conveyor belt to continuously pass through the frame, the automated packaging device can be directly integrated without interrupting or modifying the original production line, forming a unique "through-without-breaking" transformation mode. Inside the device, the plastic tray feeding conveyor line, vision positioning system, multi-axis motion mechanism, pickup actuator and finished product transfer mechanism work together to form a closed-loop system that completes the entire "pick-up-pack-delivery" process within an independent frame. Finally, the well-packaged product is seamlessly returned to the original conveyor belt, thereby maintaining the physical and functional continuity of the original production line and reducing the difficulty, engineering complexity and overall cost of automation upgrades.

[0017] B. In this invention, by setting up a storage box, gravity is used to achieve the initial stacking and falling of plastic trays. By setting up a stop part, the penultimate layer of plastic trays can be selectively blocked. The two work together to achieve the separation and controlled falling of plastic trays one by one. The plastic trays can be separated individually without complex power and fed by the plastic tray conveyor belt, which reduces the complexity and cost of the equipment, and avoids the problems of plastic tray jamming or double-piece falling.

[0018] C. In this invention, by setting a clamping unit with an inverted V-shaped guide opening, the position of the plastic tray is automatically corrected during the clamping process, the positioning deviation is compensated, and different sizes of plastic trays are adaptively clamped and aligned, which greatly improves the success rate and adaptability of the transfer. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the internal structure of the frame of the present invention; Figure 3 This is a three-dimensional structural diagram of the plastic pallet feeding conveyor line, multi-axis motion mechanism, pickup actuator, and finished product transfer mechanism of the present invention. Figure 4 This is a three-dimensional structural diagram of the pushing part of the present invention; Figure 5 This is a three-dimensional structural diagram of the plastic tray feeding conveyor line of the present invention; Figure 6 This is a cross-sectional view of the storage box of the present invention; Figure 7 For the present invention Figure 6 Enlarged structural diagram at point A; Figure 8 This is a three-dimensional structural diagram of the multi-axis motion mechanism and the pickup actuator of the present invention; Figure 9 This is a three-dimensional structural diagram of the turntable and transfer unit in this invention; Figure 10 This is a three-dimensional structural diagram of the clamping component of the present invention.

[0020] The attached figures are labeled as follows: 1. Frame; 2. Mobile phone case conveyor belt; 3. Plastic tray feeding conveyor line; 31. Plastic tray conveyor belt; 32. Unloading mechanism; 321. Storage box; 322. Stopping part; 3221. Stopping fixing block; 3222. Stopping double-sided threaded screw; 3223. Stopping nut block; 3224. Stopping limit rod; 3225. Stopping arm; 3226. Stopping clamp block; 3227. Stopping motor; 323. Supporting part; 3231. Support fixing block; 3232. Supporting double-sided threaded screw; 3233. Supporting nut block; 3234. Supporting limit rod; 3235. Supporting arm; 3236. Supporting support body; 3237. Supporting motor; 324. Mounting base; 325. Air blowing nozzle; 33. Feeding support. 34. Plastic tray discharge position; 4. Multi-axis motion mechanism; 41. Vertical linear module; 42. Horizontal displacement linear module; 43. Drive cylinder; 5. Pickup actuator; 6. Transfer table; 7. Pushing part; 71. Pushing support; 72. Pushing fixing block; 73. Pushing screw; 74. Pushing nut block; 75. Pushing limit rod; 76. Bracket; 77. Push rod; 78. Pushing block; 79. Pushing motor; 8. Transfer part; 81. Transfer support; 82. Transfer horizontal linear module; 83. Transfer vertical linear module; 84. Mounting plate; 85. Transfer cylinder; 86. Clamping component; 861. Connecting seat; 862. Clamping unit; 8621. Drive part; 8622. Clamping arm; 8623. Clamping plate. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1-10 The present invention is further illustrated by the embodiments: like Figure 1-10 As shown, an automated mobile phone case packaging device based on an AI digital twin factory includes a frame 1 and a mobile phone case conveyor belt 2 that continuously passes through the internal space of the frame 1. It also includes: a plastic tray feeding conveyor line 3, located inside the frame 1, having an assembly position adjacent to the mobile phone case conveyor belt 2; a vision positioning system, located inside the frame 1, for identifying mobile phone cases on the mobile phone case conveyor belt 2 and plastic trays at the assembly position; a multi-axis motion mechanism 4, located inside the frame 1; a pick-up actuator 5, installed at the moving end of the multi-axis motion mechanism 4 and communicatively connected to the vision positioning system, for performing pick-up and put-down operations based on the identification information; and a finished product transfer mechanism, located inside the frame 1, for outputting the assembled plastic trays to the mobile phone case conveyor belt 2.

[0022] Specifically, by designing the mobile phone case conveyor belt 2 to continuously pass through the frame 1, the automated packaging device can be directly integrated without interrupting or modifying the original production line, forming a unique "through-without-breaking" transformation mode. Inside the device, the plastic tray feeding conveyor 3, the vision positioning system, the multi-axis motion mechanism 4, the pickup actuator 5, and the finished product transfer mechanism work together to form a closed-loop system that completes the entire "pick-up-pack-delivery" process within the independent frame 1. Finally, the well-packaged products are seamlessly returned to the original conveyor belt 2, thereby maintaining the physical and functional continuity of the original production line and reducing the difficulty, engineering complexity, and overall cost of automation upgrades.

[0023] The plastic pallet feeding conveyor line 3 includes a plastic pallet conveyor belt 31 and a feeding mechanism 32 fixedly connected to the frame of the plastic pallet conveyor belt 31. The plastic pallet is directionally transported by setting up the plastic pallet conveyor belt 31, and the feeding mechanism 32 is responsible for the stable supply of plastic pallets, ensuring that the plastic pallets can be delivered to the assembly position in an orderly and accurate manner.

[0024] The unloading mechanism 32 includes a storage box 321 fixedly connected to the frame of the plastic pallet conveyor belt 31 for storing plastic pallets. The storage box 321 is open at the top and bottom so that the plastic pallets fall onto the plastic pallet conveyor belt 31 under their own weight. A stop part 322 is fixedly connected to the plastic pallet conveyor belt 31. The movable end of the stop part 322 can clamp the second-to-last layer of plastic pallets through the first opening on the side of the storage box 321, which is used to selectively block the second-to-last layer of plastic pallets. By setting up the storage box 321, the initial stacking and falling of plastic pallets is achieved by gravity. By setting up the stop part 322, the second-to-last layer of plastic pallets can be selectively blocked. The two work together to achieve the separation and controlled falling of plastic pallets one by one. The plastic pallets can be separated individually and fed by the plastic pallet conveyor belt 31 without complex power, which reduces the complexity and cost of the equipment, and avoids the problems of plastic pallet jamming or double-piece falling.

[0025] The stop part 322 includes two stop fixing blocks 3221 fixedly connected to the frame of the plastic tray conveyor belt 31. A single stop bidirectional threaded screw 3222 is rotatably connected between the two stop fixing blocks 3221. Two stop nut blocks 3223 are threadedly connected to the two helical sections of the stop bidirectional threaded screw 3222. A stop limiting rod 3224 is fixedly connected between the two stop fixing blocks 3221. Both stop nut blocks 3223 are slidably connected to the stop limiting rod 3224. A stop arm 3225 is fixedly connected to the surface of the stop nut block 3223. The stop arm 3225 has a protruding part on the side near the storage box 321 that is connected to the first... The stop clamping block 3226 corresponding to the opening also includes a stop motor 3227 whose output end is connected to and drives the stop bidirectional threaded screw 3222 to rotate. The output end of the stop motor 3227 drives the stop bidirectional threaded screw 3222 to rotate. Under the action of the stop limit rod 3224, the two stop nut blocks 3223 are driven to move towards each other, thereby causing the two stop arms 3225 to drive the two stop clamping blocks 3226 to move towards each other. After the two stop clamping blocks 3226 enter the storage box 321 from the first opening, they clamp the second to last plastic tray to prevent it from falling. This causes the bottom plastic tray to separate from the second to last plastic tray and fall under its own weight.

[0026] The feeding mechanism 32 also includes a support part 323. The movable end of the support part 323 can support the bottom plastic tray through the second opening on the side of the storage box 321, which is used to selectively block the bottom plastic tray. The support part 323 includes two support fixing blocks 3231 fixedly connected to the frame of the plastic tray conveyor belt 31. The two support fixing blocks 3231 are rotatably connected to the same support bidirectional threaded screw 3232. Two support nut blocks 3233 are threadedly connected to the two helical sections of the support bidirectional threaded screw 3232 respectively. A support limiting rod 3234 is fixedly connected between the two support fixing blocks 3231. Both support nut blocks 3233 are slidably connected to the support limiting rod 3234. A support arm 3235 is fixedly connected to the surface of the support nut block 3233. The bottom of the support is bent towards the storage box 321 and forms a support body 3236. It also includes a support motor 3237 whose output end is connected to and drives the bidirectional threaded screw 3232 to rotate. By setting the support part 323, the bottom plastic tray is selectively lifted, and the release timing of the bottom plastic tray is controlled to improve the accuracy of feeding in continuous operation. The output end of the support motor 3237 drives the bidirectional threaded screw 3232 to rotate. Under the action of the support limit rod 3234, the two support nut blocks 3233 are driven to move towards each other, which in turn causes the two support arms 3235 to drive the two support bodies 3236 to move towards each other. After entering the storage box 321 through the second opening, the two support bodies 3236 move to the bottom of the bottom plastic tray to support it and prevent it from falling.

[0027] The feeding mechanism 32 also includes an air nozzle 325 that is fixedly connected to the surface of the storage box 321 via the mounting base 324. The air nozzle 325 blows towards the gap between the bottom plastic tray and the second to last plastic tray. By setting the air nozzle 325 that points towards the gap between the plastic tray layers, the airflow is used to achieve non-contact separation of the plastic trays, effectively overcoming electrostatic adsorption or vacuum adsorption between the plastic trays and ensuring a reliable supply of single plastic trays.

[0028] The plastic tray feeding conveyor line 3 is erected above the mobile phone case conveyor belt 2 via the feeding support 33 at its bottom. The two intersect in space, and the intersection forms the assembly position. The plastic tray feeding conveyor line 3 is also equipped with a plastic tray discharge position 34. The plastic tray feeding conveyor line 3 is erected above the mobile phone case conveyor belt 2 via the feeding support 33, forming a spatial intersection. The intersection point is the assembly position. It makes full use of vertical space, making the device structure more compact and realizing online assembly without increasing the floor space.

[0029] The finished product transfer mechanism includes a transfer platform 6 at the same height as the plastic tray feeding conveyor line 3, a pushing unit 7, and a transfer unit 8. The pushing unit 7 pushes the plastic tray with assembled mobile phone case located at the plastic tray discharge position 34 on the plastic tray feeding conveyor line 3 to the transfer platform 6. The transfer unit 8 clamps the plastic tray on the transfer platform 6 and sends it to the mobile phone case conveyor belt 2. The plastic tray feeding conveyor line 3 and the mobile phone case conveyor belt 2 intersect perpendicularly in space. The transfer platform 6 is perpendicular to the plastic tray feeding conveyor line 3. The pushing unit 7 pushes the plastic tray vertically towards the transfer platform 6. By setting the transfer platform 6 at the same height and using the pushing unit 7 and the transfer unit 8 for secondary transfer, the pushing unit 7 is responsible for pushing the assembled plastic tray laterally away from the feeding line to the transfer platform 6. The transfer unit 8 then transfers it back to the main conveyor belt.

[0030] The pushing unit 7 includes two pushing supports 71. A pushing fixing block 72 is fixedly connected to the top of the pushing support 71. The same pushing screw 73 is rotatably connected between the two pushing fixing blocks 72. A pushing nut block 74 is threadedly connected to the surface of the pushing screw 73. A pushing limit rod 75 is fixedly connected between the two pushing fixing blocks 72. The pushing nut block 74 is slidably connected to the surface of the pushing limit rod 75. A push rod 77 is fixedly connected to the pushing nut block 74 via a bracket 76. A push block 78 is fixedly connected to the end of the push rod 77. The pushing unit 7 also includes a pushing motor 79 whose output end is connected to the pushing screw 73 and drives it to rotate. The push rod 77 is perpendicular to the plastic tray feeding conveyor line 3. The output end of the pushing motor 79 drives the pushing screw 73 to rotate, and then, with the cooperation of the pushing limit rod 75, the pushing nut block 74 moves, which in turn drives the bracket 76, the push rod 77, and the push block 78 to move, so that the push block 78 contacts the plastic tray and pushes the plastic tray onto the transfer table 6.

[0031] The transfer unit 8 includes a transfer support 81, on which a horizontal linear transfer module 82 and a vertical linear transfer module 83 are fixedly connected. The vertical linear transfer module 83 is connected to the movable end of the horizontal linear transfer module 82 and intersects it perpendicularly. A mounting plate 84 is fixedly connected to the movable end of the vertical linear transfer module 83. A transfer cylinder 85 is fixedly connected to one side of the mounting plate 84. A clamping member 86 is fixedly connected to the output end of the transfer cylinder 85. The clamping member 86 includes a connecting seat 861 fixedly connected to the output end of the transfer cylinder 85. Two clamping units 862 are symmetrically arranged at the bottom of the connecting seat 861. Each clamping unit 862 includes a drive unit 8621 and two clamping arms 8622 synchronously driven by the drive unit 8621. A clamping plate 8623 is provided at the end of each clamping arm 8622. The two clamping plates 8623 are inclined relative to each other, forming an inverted V-shaped guide opening that is narrower at the top and wider at the bottom. This allows for the transfer of horizontal linear transfer modules to proceed. The cooperation of the linear module 82, the longitudinal linear transfer module 83, and the transfer cylinder 85 enables the movement of the XYZ axes of the clamping component 86, facilitating the transfer of the plastic tray. By setting a clamping unit 862 with an inverted V-shaped guide opening, the position of the plastic tray is automatically corrected during the clamping process, compensating for positioning deviations and adaptively clamping and aligning plastic trays of different sizes, greatly improving the success rate and adaptability of the transfer. Preferably, the drive unit 8621 is a bidirectional cylinder. The cylinder body of the bidirectional cylinder is fixed on the connecting seat 861, and a connecting block is fixed to the end of its piston rod. The roots of the two clamping arms 8622 are symmetrically hinged to the left and right sides of the connecting block, so that the linear movement of the piston rod can be synchronously and equidistantly converted into the opening and closing movement of the two clamping arms 8622. To achieve automatic reset of the clamping arms 8622, a torsion spring is sleeved on the hinge shaft. The torsion spring provides an elastic torque to keep the two clamping arms 8622 normally closed. When clamping is required, the rodless chamber of the double-acting cylinder is vented, and the piston rod extends against the force of the torsion spring, driving the clamping arm 8622 to open; when release is required, the rod chamber of the double-acting cylinder is vented, and the piston rod retracts under the combined action of air pressure and the torsion spring, driving the clamping arm 8622 to close, thereby firmly clamping the plastic tray.

[0032] The multi-axis motion mechanism 4 includes a vertically arranged vertical linear module 41 and a horizontal displacement linear module 42 connected to and perpendicularly intersecting the movable end of the vertical linear module 41. A drive cylinder 43 is fixedly connected to the movable end of the horizontal displacement linear module 42.

[0033] The pickup actuator 5 is a suction cup, which is fixedly connected to the movable end of the drive cylinder 43. By setting up the vertical linear module 41, the horizontal displacement linear module 42, the drive cylinder 43 and the suction cup to cooperate, the suction cup can adsorb the mobile phone case and move it into the plastic tray.

[0034] The visual positioning system includes a camera, a data processing module, a computing module, and a positioning compensation module.

[0035] The visual positioning system identification method is as follows: Step 1: Construct a multi-specification feature library: Collect 500 sample images of each of the mainstream mobile phone cases, covering different sizes, colors, and surface textures; The data processing module preprocesses the sample images by eliminating noise through Gaussian filtering (kernel size 5×5).

[0036]

[0037] in, =1.2+0.001× , G(x,y) represents the standard width / length of the corresponding phone case model in the feature library. The value is the Gaussian filter kernel function value; x, y These are the two-dimensional coordinates of pixels within the filter kernel relative to the kernel center. The standard deviation of the dynamic Gaussian filter; For the filtered image in Pixel value at coordinates; These are the global two-dimensional coordinates of the image pixels; For the original image in The pixel value at the coordinates; the standard width / length unit for the corresponding model of mobile phone case in the feature library is millimeters.

[0038] The edge contour of the phone case was extracted using Canny edge detection (threshold range 50-150), and key feature points were extracted using Harris corner detection.

[0039]

[0040]

[0041] in Canny represents the edge strength value (0-255) after edge detection. The extracted features are quantized, and the length L and width W of the phone case edge contour are directly read. Calculate the mean and variance of texture grayscale:

[0042]

[0043]

[0044] ; The grayscale gradient is in the x / y direction. The larger the gradient, the higher the weight, highlighting the micro-gradient characteristics of the frosted material and realizing the dual feature quantization of material and size.

[0045] A "multi-specification feature library" is constructed, and the above data is stored in the SSD of the data processing unit.

[0046] Step 2: Acquire and preprocess real-time images: The camera captures a global image of the phone case on conveyor belt 2 and three-directional vibration displacement data (Δx, Δy, Δz). .

[0047] The data processing module performs grayscale conversion on the global image and enhances contrast through histogram equalization.

[0048]

[0049] in, .

[0050] Step 3: Quick matching of multiple specifications: The computation module extracts features from the grayscale image and performs a preliminary matching with the feature library, using Euclidean distance to calculate similarity.

[0051]

[0052] .

[0053] It corresponds to 6 feature dimensions: length, width, corner coordinates x1, corner coordinates y1, gray mean, and gray variance.

[0054] If the initial matching similarity is ≥90%, the corresponding phone case model is directly output; if the similarity is <90%, a pre-trained lightweight deep learning model is called for secondary matching. The model learns features of the image's texture and local details and outputs the matching result.

[0055] Secondary matching invokes a deep learning model:

[0056] By strengthening the training of hard-to-distinguish samples, the problem of confusion between small-sized phone cases and large-sized products can be solved.

[0057] Step 4: High-precision positioning and vibration compensation: The localization compensation module performs localization and vibration compensation on images with a matching similarity of ≥90%. The vibration compensation correction is as follows:

[0058]

[0059] .

[0060]

[0061] in,

[0062] Iterative correction of positioning error:

[0063]

[0064]

[0065]

[0066]

[0067] ; ; in, .

[0068] Attitude correction:

[0069]

[0070]

[0071]

[0072] ; After positioning and vibration compensation, the acquired image position information can be more closely matched with the actual position information of the mobile phone case, which facilitates the subsequent operation of the multi-axis motion mechanism 4.

[0073] Working principle: When the automated mobile phone case packaging device based on the AI ​​digital twin factory is used, the user first starts the device, and the mobile phone case passes through the frame 1 at a constant speed along the continuously running mobile phone case conveyor belt 2.

[0074] In the initial state, the two stop clamps 3226 clamp the second-to-last plastic tray in the storage box 321, and the two support legs support the bottom plastic tray. When the device is started, the output of the support motor 3237 drives the support bidirectional threaded screw 3232 to rotate. Under the action of the support limit rod 3234, the two support nut blocks 3233 move in opposite directions, which in turn causes the two support arms 3235 to drive the two support supports 3236 to move in opposite directions. The two support supports 3236 move out of the storage box 321 through the second opening. At this time, the air nozzle 325 blows air, causing the bottom plastic tray to move under its own weight and... The airflow falls onto the plastic tray conveyor belt 31; then the support body 3236 resets. At this time, the output end of the stop motor 3227 drives the stop bidirectional threaded screw 3222 to rotate. Under the action of the stop limit rod 3224, it drives the two stop nut blocks 3223 to move in opposite directions, thereby causing the two stop arms 3225 to drive the two stop clamping blocks 3226 to move in opposite directions. The two stop clamping blocks 3226 move out of the storage box 321 from the first opening, releasing the clamping of the penultimate layer of plastic trays. All the plastic trays in the storage box 321 fall onto the support body 3236, and then the stop clamping blocks 3226 reset, preparing for subsequent material unloading.

[0075] Under the guidance of the vision positioning system, the multi-axis motion mechanism 4 drives the suction cup to move. The horizontal displacement linear module 42 and the vertical linear module 41 work together to drive the suction cup at the end to move quickly to the top of the target phone case. After the suction cup descends and completes the adsorption, it lifts and moves the phone case to the top of the plastic tray, and finally accurately places the phone case into the corresponding cavity of the plastic tray, completing the core assembly operation.

[0076] After assembly, the plastic tray containing the phone case is conveyed forward by the plastic tray conveyor belt 31 to the designated plastic tray discharge position 34.

[0077] Next, the finished product transfer mechanism begins operation. First, the pushing unit 7 operates. Driven by the pushing motor 79, the pushing screw 73 rotates, causing the pushing block 78 to move towards the plastic tray, smoothly pushing the plastic tray away from the plastic tray feeding conveyor line 3 and sending it to the transfer table 6 for temporary storage. Subsequently, the transfer horizontal linear module 82 and the transfer vertical linear module 83 cooperate to drive the clamping member 86 to move above the transfer table 6. The transfer cylinder 85 drives the clamping member 86 to descend. The unique inverted V-shaped guide opening on its end clamping unit 862 can automatically guide and align when it contacts the plastic tray. The driving unit 8621 then operates, driving the two clamping arms 8622 to close synchronously, clamping the plastic tray. The clamping member 86 lifts the plastic tray and moves it to the release point above the mobile phone case conveyor belt 2. The driving unit 8621 reverses its operation, and the clamping arms 8622 open, smoothly releasing the packaged finished product onto the continuously running mobile phone case conveyor belt 2.

[0078] Finally, the finished product flows out of the rack 1 along the phone case conveyor belt 2 and enters the subsequent packaging or testing process, thus realizing a complete automated packaging cycle without interrupting or changing the continuity and integrity of the original production line.

[0079] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of the present invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. An AI digital twin factory-based automated mobile phone shell packaging device, comprising a rack (1) and a mobile phone shell conveying belt (2) continuously passing through the internal space of the rack (1), characterized in that, Also include: Plastic topline feeding conveying line (3) is arranged in the inside of the frame (1), it has a assembly position adjacent to the mobile phone shell conveying belt (2); Visual positioning system, arranged in the inside of the frame (1), for identifying the mobile phone shell on the mobile phone shell conveying belt (2) and the plastic holder on the assembly position; Multi-axis motion mechanism (4), arranged in the inside of the frame (1); Pickup executor (5), installed at the motion end of the multi-axis motion mechanism (4), and connected with visual positioning system in communication, for performing grabbing and placing operation according to identification information; Finished product transfer mechanism, arranged in the inside of the frame (1), for outputting the plastic holder which has completed assembly to the mobile phone shell conveying belt (2).

2. An automated mobile phone case packaging device based on AI digital twin factory according to claim 1, characterized in that: The plastic topline feeding conveying line (3) includes a plastic topline conveying belt (31) and a blanking mechanism (32) fixedly connected to the frame body of the plastic topline conveying belt (31).

3. The automated mobile phone case packaging device based on AI digital twin factory of claim 2, wherein: The blanking mechanism (32) includes a storage box (321) for storing plastic holders, which is fixedly connected to the frame body of the plastic topline conveying belt (31), the storage box (321) is in the shape of an upper and lower opening, so that the plastic holders fall on the plastic topline conveying belt (31) under the action of their own gravity, the plastic topline conveying belt (31) is fixedly connected with a stop portion (322), the movable end of the stop portion (322) can clamp the second last layer of plastic holders through the first opening on the side of the storage box (321), for selectively blocking the second last layer of plastic holders.

4. An automated mobile phone case packaging device based on AI digital twin factory according to claim 3, characterized in that: The stop portion (322) includes two stop fixed blocks (3221) fixedly connected to the frame body of the plastic topline conveying belt (31), a same stop double-thread screw rod (3222) is rotatably connected between the two stop fixed blocks (3221), two stop nut blocks (3223) are threadedly connected on the two rotation direction sections of the stop double-thread screw rod (3222) respectively, a stop limiting rod (3224) is fixedly connected between the two stop fixed blocks (3221), the two stop nut blocks (3223) are slidably connected with the stop limiting rod (3224), a stop arm (3225) is fixedly connected to the surface of the stop nut block (3223), a stop clamping block (3226) is formed on the side of the stop arm (3225) close to the storage box (321), the stop clamping block (3226) is protruding and corresponds to the first opening, and the output end of a stop motor (3227) is connected with the stop double-thread screw rod (3222) and drives the rotation of the stop double-thread screw rod (3222).

5. An automated mobile phone case packaging device based on AI digital twin factory according to claim 2, characterized in that: The blanking mechanism (32) further includes a supporting portion (323), the movable end of the supporting portion (323) can hold the bottom layer of plastic holders through the second opening on the side of the storage box (321), for selectively blocking the bottom layer of plastic holders; The supporting part (323) comprises two supporting fixed blocks (3231) fixedly connected to the frame body of the plastic supporting conveying belt (31), one same supporting bidirectional screw rod (3232) is rotationally connected between the two supporting fixed blocks (3231), two supporting nut blocks (3233) are threadedly connected to two rotation direction sections of the supporting bidirectional screw rod (3232) respectively, a supporting limiting rod (3234) is fixedly connected between the two supporting fixed blocks (3231), the two supporting nut blocks (3233) are slidably connected with the supporting limiting rod (3234), a supporting arm (3235) is fixedly connected to the surface of the supporting nut block (3233), the bottom of the supporting arm (3235) is bent towards the storage box (321) and forms a supporting support body (3236), and the supporting arm (3235) further comprises a supporting motor (3237) connected with the supporting bidirectional screw rod (3232) and driving the supporting bidirectional screw rod (3232) to rotate.

6. An automated mobile phone case packaging device based on AI digital twin factory according to claim 2, characterized in that: The blanking mechanism (32) further comprises a blowing nozzle (325) fixedly connected to the surface of the storage box (321) through a mounting seat (324), and a blowing end of the blowing nozzle (325) points to the gap between the bottom layer of plastic supports and the second last layer of plastic supports.

7. An automated mobile phone case packaging device based on AI digital twin factory according to claim 1, characterized in that: The plastic supporting feeding conveying line (3) is erected and spans above the mobile phone shell conveying belt (2) through the feeding support (33) at the bottom of the plastic supporting feeding conveying line (3), the two intersect in space, and the intersection forms an assembly position, and the plastic supporting feeding conveying line (3) is further provided with a plastic supporting discharging position (34).

8. An automated mobile phone case packaging device based on AI digital twin factory according to claim 7, characterized in that: The finished product transfer mechanism comprises a transfer table (6) which is in the same height as the plastic supporting feeding conveying line (3), a pushing part (7) and a transfer part (8), the pushing part (7) pushes the plastic support with an assembled mobile phone shell at the plastic supporting discharging position (34) on the plastic supporting feeding conveying line (3) to the transfer table (6), and the transfer part (8) clamps the plastic support on the transfer table (6) and sends it to the mobile phone shell conveying belt (2). The plastic supporting feeding conveying line (3) and the mobile phone shell conveying belt (2) intersect perpendicularly in space, the transfer table (6) is perpendicular to the plastic supporting feeding conveying line (3), and the pushing part (7) pushes the plastic support vertically to the transfer table (6).

9. An automated mobile phone case packaging device based on AI digital twin factory according to claim 8, characterized in that: The pushing part (7) comprises two pushing support bases (71), the top of the pushing support base (71) is fixedly connected with a pushing fixed block (72), one same pushing screw rod (73) is rotationally connected between the two pushing fixed blocks (72), a pushing nut block (74) is threadedly connected to the surface of the pushing screw rod (73), a pushing limiting rod (75) is fixedly connected between the two pushing fixed blocks (72), the surface of the pushing nut block (74) and the pushing limiting rod (75) is slidably connected, a push rod (77) is fixedly connected to the pushing nut block (74) through a support (76), the end of the push rod (77) is fixedly connected with a push block (78), the pushing part (7) further comprises a pushing motor (79) connected with the pushing screw rod (73) and driving the pushing screw rod (73) to rotate, and the push rod (77) is perpendicular to the plastic supporting feeding conveying line (3).

10. The automated mobile phone case packaging device based on AI digital twin factory of claim 8, wherein: The transfer part (8) includes a transfer support (81), a transfer horizontal linear module (82) is fixedly connected to the transfer support (81), and a transfer longitudinal linear module (83) is connected to a movable end of the transfer horizontal linear module (82) and is perpendicular to the transfer horizontal linear module (82), a movable end of the transfer longitudinal linear module (83) is fixedly connected to a mounting plate (84), one side of the mounting plate (84) is fixedly connected to a transfer air cylinder (85), and an output end of the transfer air cylinder (85) is fixedly connected to a clamping piece (86); The clamping piece (86) includes a connecting seat (861) fixedly connected to an output end of the transfer air cylinder (85), and two clamping units (862) are symmetrically arranged at the bottom of the connecting seat (861); Each clamping unit (862) includes a driving part (8621) and two clamping arms (8622) synchronously driven by the driving part (8621), the clamping arms (8622) are provided with clamping plates (8623) at the ends, and the two clamping plates (8623) are oppositely and obliquely arranged, forming inverted V-shaped guide openings which are narrow at the top and wide at the bottom.

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