Automatic production line for plywood hot-pressing procedure and technological process

Abstract

The invention relates to the technical field of production lines, in particular to a plywood hot-pressing procedure automatic production line and a technological process. Comprising a feeding device, a lifting stacking device, a transfer conveying assembly, a plywood guide frame, a plurality of hot presses and a finished product detecting and repairing device, the feeding device, the lifting stacking device and the hot presses are sequentially arranged, the feeding device and the lifting stacking device are adjacently arranged, and the transfer conveying assembly moves back and forth between the lifting stacking device and the hot presses. A machine body guide frame is arranged on one side of each hot press; the finished product detecting and repairing device is arranged on the sides, away from the first hot press, of the multiple hot presses. The finished product detecting and repairing device comprises a finished product conveying line. And the automatic control system comprises a feeding control system, a lifting stacking control system, a transfer conveying control system, a hot press control system and a finished product detecting and repairing system. According to the production line, the production efficiency and the product quality are improved, and the labor cost and the material loss are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic presses, and particularly relates to an automated production line and process flow for the hot pressing process of plywood. Background Art

[0002] Currently, for the well-known hot pressing process of plywood, it is necessary to first prepare the glued board blanks, then place the board blanks into a hot press, apply a certain pressure, and at the same time raise the temperature to cure the adhesive under high temperature and high pressure. During this process, workers need to place the glued board blanks on a conveyor belt, and then they are transported layer by layer into a multi-layer hot press by a lifting frame and a pushing plate.

[0003] This feeding method relies on manual labor to send the board blanks to the conveyor belt and then place them layer by layer into the hot press through a lifting frame. This method not only has low efficiency but also has potential safety hazards. During the manual feeding process, workers need to be in close contact with the equipment, which increases the labor intensity and safety risks. Due to the errors in the position after feeding, this directly affects the quality stability of the processed products. Moreover, when manually loading and unloading, it is difficult to ensure consistent or qualified clamping accuracy, which affects the processing accuracy and quality of the products. After the hot press presses the finished products, the detection method is also manual. Humans are prone to fatigue during long-term repetitive work, resulting in a decrease in detection efficiency and an increase in the misjudgment rate. In today's era of rapid technological development, obviously manual detection has an impact on efficiency.

[0004] Therefore, the present invention proposes an automated production line and process flow for the hot pressing process of plywood, aiming to achieve automated feeding, automatic hot pressing, and automatic detection and repair of plywood. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems existing in the prior art, and to propose an automated production line and process flow for the hot pressing process of plywood.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions: An automated production line for the hot pressing process of plywood includes a feeding device, a lifting and stacking device, a transfer and conveying component, a plywood guiding frame, a plurality of hot presses, and a finished product detection and repair device. The feeding device, the lifting and stacking device, and the plurality of hot presses are arranged in sequence. The feeding device and the lifting and stacking device are adjacent to each other. The transfer and conveying component moves back and forth between the lifting and stacking device and the plurality of hot presses. The unloading mechanism moves back and forth between the plurality of hot presses and the finished product stacking area. The body guiding frames are respectively arranged on one side of the plurality of hot presses; The feeding device is used to convey plywood to the lifting and stacking device. The transfer and conveying component is used to convey the plywood in the lifting and stacking device to the plurality of hot presses. The unloading mechanism 6 is used to convey the pressed finished products to the finished product stacking area; The finished product inspection and repair device is arranged on one side of the finished product stacking area, and the finished product inspection and repair device includes a finished product conveyor line; It further includes an automated control system, and the automated control system includes a feeding control system, a lifting and palletizing control system, a transfer conveyor control system, a hot press control system, a discharging control system, a manipulator control system, and a finished product inspection and repair system.

[0007] Further, the feeding device includes a frame, on which a suction cup assembly is slidably arranged. The suction cup assembly includes a pair of cross beams straddling the frame, and the pair of cross beams drive the entire suction cup assembly to slide on the frame. A suction cup frame mounting plate is slidably arranged on the pair of cross beams. The suction cup frame mounting plate is penetrated by a vertically sliding long strip guide rail mounting plate. The bottom of the long strip guide rail mounting plate is fixedly connected to a suction cup frame, and a plurality of suction cups are arranged below the suction cup frame.

[0008] Further, the lifting and palletizing device includes a fixed frame and a lifting frame. The lifting frame is slidably connected to the fixed frame. A plurality of transverse brackets are arranged on one side of the lifting frame close to the fixed frame. A plurality of discharging brackets are respectively arranged on the plurality of transverse brackets. The discharging brackets are perpendicular to the transverse brackets, and stoppers are respectively arranged at both ends of the discharging brackets.

[0009] Further, one side edge of the lifting frame is a solid plate body.

[0010] Further, the plywood guide frame is connected to the body of the hot press. The plywood guide frame includes a concave frame, guide brackets, and guide wheels. A plurality of guide brackets are respectively arranged on the left and right sides of the concave frame, and a plurality of guide wheels are arranged on the plurality of guide brackets.

[0011] Further, the distance between adjacent discharging brackets in the longitudinal direction is equal to the distance between adjacent guide brackets in the longitudinal direction.

[0012] Further, the finished product inspection and repair system includes a data acquisition module, an analysis and detection module, a defect repair module, and a data processing and feedback module. The data acquisition module is used to acquire finished product images. The analysis and detection module is used to analyze the defects in the finished product images. The defect repair module is used to repair the defects in the finished products. The data processing and feedback module records and analyzes the data during the detection and repair processes.

[0013] Further, the data acquisition module is arranged above the finished product conveyor line. The data acquisition module includes a plurality of vision sensors. The analysis and detection module includes a deep learning model. The defect repair module includes a manipulator repair device and a manipulator path planning module.

[0014] Further, in S1, the loading device transports the plywood slab to the lifting and stacking device; In S2, the transfer and conveying assembly transports the plywood slab into the hot press; In S3, the hot press starts hot pressing; In S4, the finished plywood is conveyed; In S5, the finished plywood is inspected and repaired.

[0015] Further, in S2, it further includes: In S21, during the transportation by the transfer and conveying assembly, a group of plywood slabs are first transported into the first hot press for hot pressing. The loading device continues to return to the lifting and stacking device to continue transporting the plywood slabs, and transports the plywood slabs into the second hot press. The transfer and conveying assembly repeats the action of transporting the plywood until there are plywood slabs to be pressed in all the hot presses; Further, in S4, it further includes: The unloading mechanism drags the finished plywood out of the hot press, transports it to the finished product stacking area, and then the manipulator grabs the finished plywood onto the finished product conveyor line for inspection; In S5, it further includes: S51: The data acquisition module acquires the image of the finished plywood and transmits the image information to the model detection module; S52: The analysis and detection module analyzes the acquired image to identify the positions of defects such as cracks and holes; S53: The manipulator repair device in the repair module repairs the identified defects; In S52: The formula for the defect area identified by the analysis and detection module can be expressed as , where A is the defect area, I(i, j) is the binary value of the pixel point, n is the height of the image, m is the width of the image, (i, j) = 1 indicates that the pixel point at position (i, j) is a defect; (i, j) = 0 indicates that the pixel point at position (i, j) is a non-defect, If it is necessary to convert the defect area into the actual physical area A actual , then: , where, is the physical size of a single pixel in the horizontal direction (unit: m / pixel); is the physical size of a single pixel in the vertical direction (unit: m / pixel); The manipulator repair device repairs the physical area A actualThe calculation formula for the repair time T can be expressed as: ; Wherein, t1 represents the time for the manipulator to move, and the calculation formula for t1 can be expressed as: , where d is the distance between defects, and V max represents the maximum speed, and a represents the acceleration of the manipulator; , where R represents the gluing rate, with the unit of m² / s; t3 represents the time for the glue to cure; represents the buffer time, specifically referring to the additional time margin reserved when the manipulator repairs the defect.

[0016] Compared with the existing technology, an automated production line and process flow for the hot pressing process of plywood provided by the present invention have the following advantages: 1. The layout of the automated production line is reasonable, reducing manual operations, increasing the safety of the production process. The automated production line reduces dependence on labor, reduces the labor force, and thus reduces labor costs; 2. The automated loading device and the transfer and conveying component can accurately convey the slab to the hot press, ensuring that the position of each loading is consistent, thereby improving the quality stability of the processed products; 3. When the plywood enters the hot press, the transfer and conveying component 3 automatically and accurately positions each plywood slab on the heating plate in the hot press, ensuring the position of the plywood slab on the heating plate of the hot press, avoiding slab offset or slippage caused by improper manual placement, and ensuring the safety of the operators; 4. High degree of automation, improving production efficiency. Through the loading device for loading, the transfer and conveying component conveys the plywood slab. After the slab is hot pressed, the finished product detection and repair device detects and repairs the defects of the plywood finished product, greatly improving the production efficiency and shortening the production cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the production line of the present invention; Figure 2 is a top view schematic diagram of the production line of the present invention; Figure 3 is a structural schematic diagram of the loading device of the present invention; Figure 4 is a structural schematic diagram of the suction cup component; Figure 5 is a structural schematic diagram of the lifting and palletizing device of the present invention Figure 1 ; Figure 6 is a structural schematic diagram of the lifting and palletizing device of the present invention Figure 2 ; Figure 7 Schematic three-dimensional structure diagram of the transfer and conveying component in the present invention; Figure 8 is Figure 7 Schematic side view structure diagram; Figure 9 Schematic structure diagram of the plywood guiding frame of the present invention; Figure 10 Schematic diagram of the automatic control system of the present invention; In the figure: 1. Loading device, 10. Suction cup assembly, 11. Cross beam, 12. Suction cup frame mounting plate, 13. Motor mounting seat, 14. Long strip guide rail mounting plate, 15. Suction cup frame, 2. Lifting and palletizing device, 20. Fixed frame, 21. Lifting frame, 211. Solid plate, 22. Horizontal support, 23. Feeding support, 3. Transfer and conveying component, 31. Moving flat plate, 32. Moving bottom plate, 33. Square frame, 34. Horizontal support two, 35. Guide wheel two, 36. Positioning and clamping push plate device, 361. Fixed pin, 362. Fixed pin mounting plate, 363. Fixed clamping cylinder, 4. Plywood guiding frame, 40. Concave frame, 41. Guiding support, 42. Guide wheel, 5. Hot press, 6. Unloading mechanism, 7. Finished product inspection and repair device, 71. Finished product conveying line. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "first", "second", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

[0020] Example 1, as Figures 1-10As shown in the figure, an automated production line for the hot pressing process of plywood includes a loading device 1, a lifting and stacking device 2, a transfer conveyor assembly 3, a plywood guiding frame 4, multiple hot presses 5, and a finished product inspection and repair device 7. The loading device 1, the lifting and stacking device 2, and the multiple hot presses are arranged in sequence. The loading device 10 and the lifting and stacking device 2 are adjacent to each other. The transfer conveyor assembly 3 moves back and forth between the lifting and stacking device 2 and the multiple hot presses 7. The unloading mechanism 6 moves back and forth between the multiple hot presses 5 and the finished product stacking area. A machine body guiding frame 40 is respectively arranged on one side of the multiple hot presses 5; The loading device 1 is used to convey the plywood billets to the lifting and stacking device 2. The transfer conveyor assembly 3 is used to convey the plywood billets in the lifting and stacking device 2 to the multiple hot presses. The unloading mechanism 6 is used to convey the pressed plywood finished products to the finished product stacking area; The finished product inspection and repair device 7 is arranged on one side of the finished product stacking area. The finished product inspection and repair device 7 includes a finished product conveyor line 71; It also includes an automated control system, which includes a loading control system, a lifting and stacking control system, a transfer conveyor control system, a hot press control system, an unloading control system, a manipulator control system, and a finished product inspection and repair system.

[0021] The loading control system controls the loading device 1. The lifting and stacking control system controls the lifting and stacking device 2. The transfer conveyor control system controls the transfer conveyor assembly 3. The hot press control system is used to control the multiple hot presses 5. The unloading control system controls the unloading mechanism 6. The finished product inspection and repair system is used to control the finished product inspection and repair device 7.

[0022] Through this technical solution, the automated production of the hot pressing process of plywood billets is realized. Through the automatic loading of the loading device 1, the loading device 1 adsorbs multiple plywood billets onto the lifting and stacking device 2. The transfer conveyor assembly 3 then conveys the multiple plywood billets to the hot press 5. After the hot press 5 finishes pressing, the same unloading mechanism 6 as the transfer conveyor assembly 3 is used to take out the pressed plywood finished products. Subsequently, the manipulator grabs the plywood finished products onto the finished product conveyor line 71, and the finished product inspection and repair device 7 inspects the finished products and repairs the defective plywood finished products.

[0023] Example 2, as Figures 3-4As shown in the figure, the loading device 1 includes a loading frame. A suction cup assembly 10 is slidably arranged on the loading frame. The suction cup assembly 10 includes a pair of cross beams 11 spanning across the loading frame. A suction cup mounting plate 12 is arranged between the pair of cross beams 11. The suction cup mounting plate 12 can slide on the cross beams 11. A hollow motor mounting seat 13 is fixed on the suction cup mounting plate 12. Sliders are fixed on the opposite inner sides of the motor mounting seat 13. A long guide rail mounting plate 14 penetrates through the suction cup mounting plate 12 and the motor mounting seat 13. A suction cup frame slide rail is arranged on the long guide rail mounting plate 14. The suction cup frame slide rail is slidably connected with the sliders. A suction cup frame 15 is fixedly connected to the lower end of the long guide rail mounting plate 14. A plurality of suction cups are arranged below the suction cup frame 15. A rack is also arranged on one side of the long guide rail mounting plate 14. The first motor mounted on the motor mounting seat 13 and the rack mounted on the long guide rail mounting plate 14 are driven by gears, so as to drive the suction cup frame 15 to reciprocate in the longitudinal direction. In order to better guide the suction cup frame 15, guide rods are arranged at the four corners of the suction cup frame 15. The guide rods are slidably connected with the guide rod fixing plates. Fixed rods are arranged on the upper plate surface of the guide rod fixing plates and fixedly connected with the suction cup mounting plate 12.

[0024] The suction cup mounting plate 12 can slide on the cross beams 11. Specifically, the connection is as follows. Slide rails one are respectively arranged on the two cross beams 11. A slider one is fixed on the lower plate surface of the suction cup mounting plate 12. The slider one is slidably connected with the slide rail one. Similarly, the movement of the suction cup mounting plate is also driven by a second motor.

[0025] When the automatic control system is started, a sensor one is used to sense the position of the plywood slab. The loading control system then controls the suction cup assembly 10 to grab the plywood slab. That is, the suction cups in the suction cup assembly 10 can suck the plywood slab. After sucking the plywood slab, the suction cup assembly 10 slides along the loading frame towards the lifting and palletizing device 2 and places the plywood slab on the lifting and palletizing device 2.

[0026] In this embodiment, the automatic control system is integrated in the electrical cabinet. An operating platform is also arranged and electrically connected to the electrical cabinet. There is a visual operation screen on the operating platform, which is convenient for inputting or modifying the parameters in the automatic control system and better realizing the human-computer interaction experience.

[0027] Example 3, as Figures 5-6As shown in the figure, the lifting and palletizing device 2 includes a fixed frame 20 and a lifting frame 21. The lifting frame 21 is slidably connected to the fixed frame 20. A number of transverse brackets 22 are provided on one side of the lifting frame 21 close to the fixed frame 20. A number of blanking brackets 23 are respectively provided on the number of transverse brackets 22. The blanking brackets 23 are perpendicular to the transverse brackets 22. Blocks are respectively provided at both ends of the blanking brackets 23, which can play a better role in positioning and limiting the plywood slab. The lifting and palletizing device 2 is driven by a third motor. The third motor drives the lifting frame 21 through a gear-rack pair, so as to drive the blanking brackets 23 to move up and down.

[0028] In this embodiment, a part of the lifting and palletizing device 2 is placed in the foundation. The fixed frame 20 is fixed to the pit wall of the foundation by bolts. A slide rail is installed on the fixed frame 20. The lifting frame 21 slides on the slide rail through a slider. Sensors two for sensing the plywood slab are provided on a number of blanking brackets 23.

[0029] When the suction cup in the feeding device 1 sucks up the plywood slab and sends it to the lifting and palletizing device 2, the initial position of the bottom layer of the lifting and palletizing device 2 is lower than the frame in the feeding device 1, which is convenient for the suction cup in the feeding device 1 to suck up the plywood slab and place it on the blanking bracket 23 in the lifting and palletizing device 2. Starting from the bottom layer of the lifting and palletizing device 2, after the bottom layer is completed, the third motor drives the lifting and palletizing device 2 to move downward. When the second-layer blanking bracket 23 moves downward to be lower than the feeding frame of the feeding device 1, the lifting and palletizing device 2 stops running and starts to convey the plywood slab to the second layer until the multiple blanking brackets 23 of the lifting and palletizing device 2 are filled with plywood slabs in sequence.

[0030] Embodiment 4. In this embodiment, as Figures 7-8As shown, the transfer and conveying assembly 3 includes a moving flat plate 31, a square frame 33, a second transverse bracket 34, and a positioning, clamping and pushing plate device 36. Rolling wheels are provided below the moving flat plate 31, a moving bottom plate 32 is fixed above the moving flat plate 31, a square frame 33 is fixed above the moving bottom plate 32, several second transverse brackets 34 are respectively arranged on the left and right opposite sides of the square frame 33, and several second guide wheels 35 are arranged on the second transverse brackets 34. A positioning, clamping and pushing plate device 36 that slides back and forth inside the square frame 33 is arranged on any one of the front and rear sides of the square frame 33. The positioning, clamping and pushing plate device 36 is slidably connected to the moving bottom plate 32. Specifically, a slide rail is provided on the upper plate surface of the moving bottom plate 32, and the positioning, clamping and pushing plate device 36 slides on the slide rail. The positioning, clamping and pushing plate device 36 includes a plurality of fixing pins 361, a fixing pin mounting plate 362, and a fixed clamping cylinder 363. The plurality of fixing pins 361 are fixedly connected to the fixing pin mounting plate 362. The fixing pin mounting plate 362 is slidably connected to a fixing pin mounting seat. A multi-layer clamping plate is fixedly connected to the fixing pin mounting seat. The clamping plate includes an upper clamping plate and a lower clamping plate. The plurality of fixing pins 361 respectively penetrate through the upper clamping plate and are slidably connected to the upper clamping plate. The telescopic end of the fixed clamping cylinder 363 is fixedly connected to the top end of the fixing pin mounting plate 362. When the transfer and conveying assembly 3 clamps a plywood slab, the positioning, clamping and pushing plate device 36 is pushed out along the moving flat plate 31 and abuts against the right side of the lifting and stacking device 2. The left side of the lifting and stacking device 2 is a solid plate 211. When the positioning, clamping and pushing plate device 36 clamps the plywood slab, it can play a role in limiting. Sensors three are arranged on each multi-layer clamping plate to sense the plywood slab. After the clamping plate clamps the plywood slab, the telescopic end of the fixed clamping cylinder 363 extends out, driving the fixing pin mounting plate 362 downward, so that the fixing pins 361 abut against the upper plate surface of the plywood slab, fixing the slab. At this time, multiple plywood slabs can be moved along the second guide wheels 35 into the transfer and conveying assembly 3.

[0031] When the transfer and conveying assembly 3 is filled with plywood slabs, the transfer and conveying assembly 3 moves to one side of the hot press 5. In this embodiment, a long slide rail is arranged on one side of the hot press 5. The rolling wheels of the transfer and conveying assembly 3 roll on the long slide rail to reduce the friction between them. When the transfer and conveying assembly 3 moves to one side of any one of the hot presses 5, the telescopic end of the fixed clamping cylinder 363 in the positioning, clamping and pushing plate device 36 contracts, and the fixing pins 361 release the fixation of the plywood slab. At this time, the positioning, clamping and pushing plate motor in the positioning, clamping and pushing plate device 36 rotates, and drives the positioning, clamping and pushing plate device 36 forward through a sprocket, pushing all the plywood slabs into the hot press 5. When the plywood slab moves out of the transfer and conveying assembly 3, the plywood slab slides out along the second guide wheels 35. The arranged second guide wheels 35 increase the smoothness of the plywood slab moving out.

[0032] Example 5. In order to make the transfer and conveying assembly 3 convey the plywood slab blank to the hot press 5 more smoothly, a plywood guiding frame 4 is fixedly connected to the body of the hot press, as Figure 9 shown. The plywood guiding frame 4 includes a concave frame 40, guiding brackets 41 and guiding wheels 42. A number of guiding brackets 41 are respectively arranged on opposite sides of the concave frame 40, and a number of guiding wheels 42 are arranged on the number of guiding brackets 41. The spacing between adjacent blank placing brackets 23 in the longitudinal direction is equal to the spacing between adjacent guiding brackets 41 in the longitudinal direction. That is to say, when the transfer and conveying assembly 3 contacts the lifting and stacking device 2, the plywood slab blank can smoothly transition from the blank placing bracket 23 to the guiding bracket 41.

[0033] The hot press 5 is a prior art. In this embodiment, there are three hot presses 5 with the same structure, which are placed in the foundation, namely the first hot press, the second hot press and the third hot press. The height between two heating layers in the hot press 5 is equal to the height between adjacent guiding brackets 41 in the longitudinal direction. This facilitates the plywood slab blank in the transfer and conveying assembly 3 to be conveyed to the hot press 5 along the guiding wheels 42. It can be understood that the plywood slab blank can smoothly move from the transfer and conveying assembly 3 to the hot press 5.

[0034] Guiding components are respectively arranged in a staggered manner between the edges of adjacent heating plates inside the hot press 5. The guiding components include guiding rods and guiding fixing blocks. The guiding fixing blocks are fixed on the edges of the heating plates, and the guiding rods penetrate through the guiding fixing blocks and are slidably connected with the guiding fixing blocks. When the hot press 5 is pressing, first heat the heating plates in the hot press 5, then place the plywood slab blank on the heating plates in each layer of the hot press 5, and the moving beam on the hot press 5 presses downwards. The guiding rods play a guiding and limiting role. The downward movement of the moving beam will drive each layer of heating plates to overlap downward together, so as to perform hot pressing on the plywood slab blank in each layer of heating plates. After pressing, the moving beam moves upward, and each layer of heating plates will be driven upward to return to the initial position.

[0035] The number of heating layers in the hot press 5 is the same as the number of the second transverse brackets 34 in the transfer and conveying assembly 3. Of course, the specific number of layers can be adjusted according to the actual situation.

[0036] After the hot press 5 finishes pressing, the plywood finished product can be taken out by the unloading mechanism 6. In order to make the plywood finished product move out more smoothly, a same plywood guiding frame 4 is arranged on one side of the hot press 5 close to the unloading mechanism 6. The structure and working principle of the unloading mechanism 6 are the same as those of the transfer and conveying assembly 3. Clamp the plywood finished product with the clamping plate in the unloading mechanism 6 and convey the plywood finished product into the unloading mechanism 6. A long slide rail two is arranged on one side of the hot press 5 close to the unloading mechanism 6, and the unloading mechanism 6 slides back and forth along the long slide rail two. Of course, the same transfer and conveying assembly 3 can also be used to take out the plywood finished product, which can be arranged according to the actual on-site situation. The unloading mechanism 6 places the plywood finished product in the finished product stacking area.

[0037] As Figures 1-2 shown, in order to be able to detect defective areas in the finished plywood product, repair the defective areas, and have a thorough understanding of the entire detection and repair process, so as to better optimize the forming quality of the finished plywood product. A detection and repair system for the finished plywood product is also provided. The finished product detection and repair system includes a data acquisition module, an analysis and detection module, a defect repair module, and a data processing and feedback module. The data acquisition module is used to acquire images of the finished plywood product. The analysis and detection module is used to analyze the defects in the images of the finished plywood product. The defect repair module is used to repair the defects in the finished plywood product. The data processing and feedback module records and analyzes the data during the detection and repair process.

[0038] The data acquisition module is arranged above the finished product conveyor line 71. The data acquisition module includes multiple vision sensors. The analysis and detection module includes a deep learning model. The defect repair module includes a manipulator repair device and a manipulator path planning module.

[0039] The data acquisition module uses high-resolution vision sensors, equipped with appropriate lenses and light sources, to ensure that the surface image of the finished plywood product can be clearly captured. The frame rate and resolution of the vision sensors can be selected according to the requirements of the production speed and defect detection accuracy. In another embodiment, ultrasonic technology can also be used for detection, such as the pulse method, that is, by sending and receiving sound pulses with the same probe to measure the reflected wave; or the transmission method, that is, by measuring the transmitted wave through the thickness of the plywood slab, which requires a transmitter probe on one side and a receiver probe on the other side to send and receive sound energy. Usually, this detection information is presented on the screen in the form of digital information converted by software.

[0040] The collected image data is transmitted to the analysis and detection module through a high-speed data transmission interface, such as Vision, USB3.0, etc.

[0041] The analysis and detection module analyzes and detects the images transmitted in the data acquisition module. The analysis and detection module first preprocesses the images, converting the color images into grayscale images for subsequent processing and analysis. The grayscale images are converted into binary images to facilitate the identification and calculation of the defect areas. The binary value can be achieved by setting a threshold, setting the pixels with grayscale values higher than the threshold to 1 and the pixels lower than the threshold to 0.

[0042] After the image processing is completed, the deep learning model in the analysis and detection module analyzes the processed image again. Through the convolutional neural network in the deep learning model, the processed image is analyzed to identify the defects in the finished plywood products. In the deep learning model, a large number of labeled data of various defects in the finished plywood products are pre-trained in advance to have the ability to identify various defect types in the finished plywood products. During the detection and analysis process, the analysis and detection module will output information such as the location, size, and type of the defects.

[0043] The defect repair module includes a manipulator path planning module and a manipulator repair device. The manipulator path planning module first receives the defect data from the analysis and detection module, including information such as the location, type, and size of the defects. Then it calculates the repair time, calculates the time required to repair a single defect according to the size of the defect and the repair speed. Finally, it generates a repair path, and generates the repair path of the manipulator according to the defect data and the motion constraint conditions of the manipulator.

[0044] The manipulator repair device includes multiple joints and linkages and can achieve multi-degree-of-freedom motion to meet the repair requirements of defects in different positions and shapes. Materials of the same material as the plywood slab can be sprayed from the manipulator to repair the defects in the finished plywood products.

[0045] Finally, the data processing and feedback module generates reports on the detailed data during the detection process and the repair process. The data includes the image data of the finished plywood products, defect information, repair parameters, the amount of repair materials used, repair time, and the evaluation results of the repair effect. These reports provide real-time feedback information to relevant personnel so that they can timely understand the production status and make corresponding decisions.

[0046] A process flow includes an automated production line for plywood hot pressing process as described above, and includes the following steps: S1. The feeding device 1 transports the plywood slab to the lifting and stacking device 2; S2. The transfer conveying component 3 transports the plywood slab from the lifting and stacking device 2 to the hot press 5; S3. The hot press 5 starts hot pressing; S4. Convey the finished plywood products; S5. Detect and repair the finished plywood products; In S2, it further includes: S21. During the transportation of the transfer conveying component 3, first transport a group of plywood slabs to the first hot press 5 for hot pressing. The feeding device 1 continues to return to the lifting and stacking device 2 to continue transporting the plywood slabs, and transports the plywood slabs to the second hot press 5. The transfer conveying component 3 repeats the action of transporting the plywood until there are plywood slabs to be pressed in all the hot presses 5; In the above-mentioned S4, it further includes: The unloading mechanism 6 drags out the finished plywood products from the three hot presses 5 respectively, transports them to the finished product stacking area, and then the manipulator grabs the finished plywood products onto the finished product conveyor line 71 for inspection; In S5, it also includes: S51: The data acquisition module acquires the image of the finished plywood product and transfers the image information to the model detection module; S52: The analysis and detection module analyzes the acquired image to identify the positions of defects such as cracks and holes; S53: The manipulator repair device in the repair module repairs the identified defects; In the above-mentioned S52: The formula for the defect area identified by the analysis and detection module can be expressed as , where A is the defect area, I(i,j) is the pixel point, i and j are the binary values, n is the height of the image, m is the width of the image, (i, j) = 1, indicating that the pixel point at the position (i, j) is a defect; (i, j) = 0, indicating that the pixel point at the position (i, j) is a non-defect.

[0047] In this embodiment, assume that we have a simple binary image with a size of 3×3 pixels, as shown below: , It means that the width m of the image = 3 and the height n = 3. We can see that there are 5 pixel points with a value of 1 (indicating defects) and 4 pixel points with a value of 0 (indicating non-defects) in the image.

[0048] To calculate the defect area A, the values can be substituted into the formula , Therefore, the defect area A is 5 pixel points.

[0049] If it is necessary to convert the defect area into the actual physical area A actual , then: , where, is the physical size of a single pixel in the horizontal direction (unit: m / pixel); is the physical size of a single pixel in the vertical direction (unit: m / pixel); The manipulator repair device repairs the physical area A actual The calculation formula for the repair time T can be expressed as: ; where, t1 represents the time for the manipulator to move, and the calculation formula for t1 can be expressed as: , where d is the distance between defects, and V max represents the maximum speed, and a represents the acceleration of the manipulator; , where R represents the gluing rate in units of m² / s; t3 represents the time for the glue to cure; represents the buffer time, specifically the additional time margin reserved when the manipulator repairs defects.

[0050] Suppose we have the following parameters: The maximum speed of the manipulator: V max = 1 m / s; The distance between defects: d = 0.6 m; The acceleration of the manipulator: a = 2 m / s²; The physical area A actual = 0.02 / m²; The gluing rate R = 0.005 m² / s; The curing time is t3 = 30 s; The buffer time: = 0.5 s; Substitute the specific values according to the formula: , , Then the repair time T of the manipulator repair device for the physical area A actual can be calculated as: T = 1.6 s + 4 s + 30 s + 0.5 s = 36.1 s.

[0051] These calculated data are of great significance to the entire production line. They can optimize the production rhythm. By calculating the time required for the manipulator to repair defects, the working rhythm of the manipulator can be reasonably arranged to be coordinated with other equipment on the production line such as the finished product conveyor line 71 and the hot press 5, avoiding production bottlenecks caused by the manipulator moving too fast or too slow, thereby improving the production efficiency of the entire production line and reducing waiting time. Accurately calculating the time for the manipulator to repair defects can prevent the manipulator from waiting for a long time for the next defect to arrive after completing the repair of one defect, or pausing during the repair process due to speed mismatch, reducing the idle time and waiting time of the production line and improving equipment utilization rate.

[0052] Working principle: First, place the semi-finished slab coated with glue in the loading device 1. Start the automated control system. The loading control system controls the suction cup assembly 10 to adsorb the plywood slab into the lifting and stacking device 2. The lifting and stacking control system controls the rising and falling of the lifting frame 21. Then, the transfer conveyor control system controls the transfer conveyor assembly 3 to convey multiple layers of plywood slabs to the hot press 5 for hot pressing and forming. Next, the unloading mechanism 6 takes out the pressed plywood finished products and places them in the finished product stacking area. The plywood finished products can be clamped by a manipulator and placed on the finished product conveyor line 71. The finished product inspection and repair system inspects and repairs the plywood finished products.

[0053] The automated production line for the plywood hot pressing process fully adopts an automated workflow, improving production efficiency and product quality, and reducing labor costs and material losses.

[0054] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An automated production line for the hot pressing process of plywood, comprising a feeding device (1), a lifting and stacking device (2), a transfer conveying assembly (3), a plywood guiding frame (4), a plurality of hot presses (5), a discharging mechanism (6) and a finished product inspection and repair device (7), characterized in that: The feeding device (1), the lifting and palletizing device (2), and multiple hot presses (5) are arranged in sequence. The feeding device (1) and the lifting and palletizing device (2) are arranged adjacent to each other. The transfer conveying assembly (3) moves back and forth between the lifting and palletizing device (2) and multiple hot presses (5). The discharging mechanism (6) moves back and forth between multiple hot presses (5) and the finished product stacking area. Body guiding frames (40) are respectively arranged on both sides of multiple hot presses (5); The feeding device (1) is used to convey plywood slabs to the lifting and palletizing device (2). The transfer conveying assembly (3) is used to convey plywood slabs in the lifting and palletizing device (2) into multiple hot presses (5). The discharging mechanism (6) is used to convey the pressed finished products to the finished product stacking area; The finished product inspection and repair device (7) is arranged on one side of the finished product stacking area. The finished product inspection and repair device (7) includes a finished product conveying line (71); It further includes an automated control system, and the automated control system includes a feeding control system, a lifting and palletizing control system, a transfer conveying control system, a hot press control system, a discharging control system, a manipulator control system, and a finished product inspection and repair system.

2. The automated production line for the plywood hot pressing process according to claim 1, wherein: The feeding device (1) includes a feeding machine frame. A suction cup assembly (10) is slidably arranged on the feeding machine frame. The suction cup assembly (10) includes a pair of cross beams (11) spanning across the feeding machine frame. The pair of cross beams (11) drives the entire suction cup assembly (10) to slide on the feeding machine frame. A suction cup frame mounting plate (12) is slidably arranged on the pair of cross beams (11). A vertically sliding long strip guide rail mounting plate (14) penetrates through the suction cup frame mounting plate (12). A suction cup frame (15) is fixedly connected to the bottom of the long strip guide rail mounting plate (14). Multiple suction cups are arranged below the suction cup frame (15).

3. An automated production line for the plywood hot pressing process according to claim 1, characterized in that: The lifting and palletizing device (2) includes a fixed machine frame (20) and a lifting frame (21). The lifting frame (21) is slidably connected to the fixed machine frame (20). A number of transverse brackets (22) are arranged on one side of the lifting frame (21) close to the fixed machine frame (20). A number of material placing brackets (23) are respectively arranged on the number of transverse brackets (22). The material placing brackets (23) are perpendicular to the transverse brackets (22). Blocks are respectively arranged at both ends of the material placing brackets (23).

4. An automated production line for the hot pressing process of plywood according to claim 3, characterized in that: One side edge of the lifting frame (21) is a solid plate body (211).

5. An automated production line for the hot pressing process of plywood according to claim 1, characterized in that: The plywood guiding frame (4) is connected to the body of the hot press (7). The plywood guiding frame (4) includes a concave frame (40), guiding brackets (41), and guiding wheels (42). A number of guiding brackets (41) are respectively arranged on the left and right sides of the concave frame (40). A number of guiding wheels (42) are arranged on the number of guiding brackets (41).

6. The automated production line for the plywood hot pressing process according to claim 3, characterized in that: The spacing between adjacent material placing brackets (23) in the longitudinal direction is equal to the spacing between adjacent guiding brackets (41) in the longitudinal direction.

7. An automated production line for the hot pressing process of plywood according to claim 1, characterized in that: The finished product inspection and repair system includes a data acquisition module, an analysis and detection module, a defect repair module, and a data processing and feedback module. The data acquisition module is used to acquire images of the finished product. The analysis and detection module is used to analyze the defects in the finished product image. The defect repair module is used to repair the defects in the finished product. The data processing and feedback module records and analyzes the data during the detection and repair process.

8. An automated production line for the hot pressing process of plywood according to claim 7, characterized in that: The data acquisition module is arranged above the finished product conveyor line. The data acquisition module includes a plurality of vision sensors. The analysis and detection module includes a deep learning model. The defect repair module includes a manipulator repair device and a manipulator path planning module.

9. A process flow, comprising an automated production line for the hot pressing process of plywood according to any one of claims 1 to 8, characterized in that, It also includes the following steps: S1. The feeding device (1) conveys the plywood slab to the lifting and stacking device (2). S2. The transfer conveying assembly (3) conveys the plywood slab into the hot press (5). S3. The hot press (5) starts hot pressing. S4. Convey the plywood finished product. S5. Inspect and repair the plywood finished product.

10. A process flow according to claim 9, characterized in that, In S2, it also includes: S21. During the conveyance of the transfer conveying assembly (3), first convey a group of plywood slabs into the first hot press for hot pressing. The feeding device (1) returns to the lifting and stacking device (2) to continue conveying the plywood slabs and conveys the plywood slabs into the second hot press (5). The transfer conveying assembly (3) repeats the action of conveying the plywood slabs until there are plywood slabs to be pressed in all hot presses (5). In S4, it also includes: The unloading mechanism (6) drags the finished product out of the hot press (5), transports it to the finished product stacking area, and then the manipulator grabs the plywood finished product onto the finished product conveyor line (71) for inspection. In S5, it also includes: S51: The data acquisition module acquires the image of the plywood finished product and transmits the image information to the analysis and detection module. S52: The analysis and detection module analyzes the acquired image to identify the positions of defects such as cracks and holes. S53: The manipulator repair device in the defect repair module repairs the identified defects. In S52: The analysis and detection module can express the defect area formula identified as , Where A is the defect area, I(i, j) is the binary value of the pixel point (i, j), n is the height of the image, and m is the width of the image. (i, j)=1 indicates that the pixel point at the position (i, j) is a defect. (i, j)=0 indicates that the pixel point at the position (i, j) is a non-defect. If it is necessary to convert the defect area into the actual physical area A actual， Then: , Among them, is the physical size of a single pixel in the horizontal direction (unit: m / pixel); is the physical size of a single pixel in the vertical direction (unit: m / pixel); The manipulator repair device repairs the physical area A actual The calculation formula for the repair time T can be expressed as: ; Among them, t1 represents the time for the manipulator to move, and the calculation formula of t1 can be expressed as: , where d is the distance between defects, and V max represents the maximum speed, and a represents the acceleration of the manipulator; , where R represents the glue coating rate, with the unit of m² / s; t3 represents the time for the glue to cure. Indicates the buffer time, specifically referring to the additional time margin reserved when the manipulator repairs defects.

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