Thin plate double-sided detection equipment and detection method

Abstract

The invention relates to a thin plate double-side detection device and method, and the device comprises a first conveying line which is used for feeding a plate and completing the A-side detection of the plate, and a second conveying line which is used for discharging the plate and completing the B-side detection of the plate, and an overturning receiving mechanism is disposed between the first conveying line and the second conveying line. The overturning and receiving mechanism comprises an overturning device and a receiving device, the overturning device is used for receiving the plates from the first conveying line and achieving horizontal overturning of the plates, the receiving device is used for receiving the overturned plates, and the receiving device is in transmission connection with the overturning device through a transmission assembly; in this way, the receiving device drives the overturning device to execute the overturning action in the horizontal moving process. According to the thin plate double-face detection equipment and the detection method, the technical problem that in an existing double-face detection equipment, in the process that a plate is grabbed by a suction cup and turned over, the plate has the sliding risk is solved in a mechanical limiting and linkage transmission combined mode.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of plate detection equipment, and particularly relates to a thin plate double-sided detection equipment and a detection method. BACKGROUND

[0002] In the production process of thin plates (such as metal thin plates, glass plates, etc.), quality detection on both sides of the thin plates is a key link to ensure product quality. Currently, common detection equipment usually uses suction cups to grab the plates and realizes plate turning over by means of a turning mechanism. However, in the process of suction cup grabbing and turning over, the plates often undergo multi-angle attitude changes. If the turning over speed is not properly controlled, or the adsorption force is weakened due to environmental factors (such as oil stains and dust) and device states (such as suction cup aging), the plates are prone to falling off, and there is a significant problem of operation stability. Such defects not only affect the reliability of the detection process, but also restrict the overall detection efficiency and accuracy. Therefore, a grabbing mechanism with higher stability and a matching detection method are needed to ensure that the plates are safely and reliably fixed and transferred during turning over. SUMMARY

[0003] The present application aims to provide a thin plate double-sided detection equipment and a detection method to solve the technical problem of the risk of plate falling off in the process of suction cup grabbing and turning over of the existing double-sided detection equipment.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows: a thin plate double-sided detection equipment, comprising a first conveying line for feeding in a plate and completing A-side detection of the plate, and a second conveying line for feeding out the plate and completing B-side detection of the plate, a turning receiving mechanism is arranged between the first conveying line and the second conveying line, the turning receiving mechanism comprises a turning device for receiving the plate from the first conveying line and realizing horizontal turning over of the plate, and a receiving device for receiving the plate after turning over, a transmission assembly is transmissionally connected between the receiving device and the turning device, so that the receiving device drives the turning device to perform a turning action during horizontal movement.

[0005] Preferably, the turning device comprises a turning frame and a turning plate rotationally arranged in the turning frame, the turning plate is provided with a positioning cavity for accommodating the plate, and a limiting mechanism is arranged in the turning plate to limit movement of the plate in the positioning cavity.

[0006] Preferably, the limiting mechanism comprises a plurality of push cylinders arranged in inner grooves on both sides of the turning plate, a connecting plate is fixed on the piston rod of each push cylinder, a limiting block for abutting against the upper surface of the plate is arranged at the end of the connecting plate away from the push cylinder, the inner grooves are in communication with the positioning cavity, and the limiting block extends into the positioning cavity through the inner grooves.

[0007] Preferably, the receiving device comprises a base and a receiving seat slidingly arranged on the base, the base is provided with a driving device for driving the receiving seat to move along the extension direction of the base, and the receiving seat is provided with an upper cavity for accommodating the turned-over plate.

[0008] Preferably, the transmission assembly comprises a rack arranged on both sides of the receiving seat and a transmission gear mounted on both sides of the folding plate, the rack moves correspondingly with the movement of the receiving seat and is engaged with the transmission gear, and the folding plate is turned over by 180 degrees through the cooperation of the rack and the transmission gear.

[0009] Preferably, a mounting column is arranged on the side of the receiving device close to the turning device, a guide block is arranged on the top of the mounting column, a sliding groove is arranged on the guide block, and the rack is slidingly matched with the sliding groove.

[0010] Preferably, the receiving device further comprises a first material taking mechanism and a second material taking mechanism, the first material taking mechanism is arranged across the first conveying line and the turning device, and is used for transferring the plate at the end of the first conveying line to the turning device, and the second material taking mechanism is arranged across the receiving device and the second conveying line, and is used for transferring the plate with turned-over surface on the receiving device to the starting end of the second conveying line.

[0011] Preferably, a positioning slot for abutting against the folding plate is arranged on one side of the turning frame, and an avoiding slot for turning over the folding plate is arranged on the side of the turning frame away from the positioning slot.

[0012] Preferably, a plurality of sliding rails are arranged on the base, and the two groups of movable mold bases are relatively slid through the sliding rails.

[0013] The application provides a detection method using the above-mentioned thin plate double-face detection equipment, comprising the following steps: S1: loading and A-face detection, placing the plate to be detected on the first conveying line with the A face upward, conveying the plate along the first conveying line, and detecting or scanning the A face of the plate by manual operation or a detection sensor when passing through an A-face detection station to obtain A-face detection data; S2: plate positioning and first-time transfer, the plate reaches a waiting position at the end of the first conveying line and is accurately positioned, the vacuum suction disc array of the first material taking mechanism is lowered to adsorb the plate, the adsorption state is monitored through a vacuum pressure sensor, and the plate is transferred to the folding plate of the turning device after being confirmed to be stable; S3: plate limiting, the plate is embedded in the positioning cavity of the folding plate, the limiting mechanism on both sides of the positioning cavity is extended to abut against the upper surface of the plate, and the plate is fixed in the positioning cavity; S4: The plate is flipped over, the receiving seat is driven by the driving device to move towards the side close to the turnover frame, and the folding plate is horizontally rotated by 180 degrees through the transmission assembly; S5: The plate limiting is released, after the flipping is completed, the limiting mechanism abutting against the lower side of the plate is withdrawn into the folding plate, at this time the receiving seat is synchronously moved to the lower side of the folding plate, and the plate falls onto the receiving seat under the action of gravity; S6: Secondary transfer and B face detection, the receiving seat returns to the initial position after receiving the plate, and drives the folding plate to reset; the receiving seat moves to the lower side of the second material taking mechanism, the vacuum suction disc array of the second material taking mechanism is lowered to adsorb the plate with the flipped face, and the plate is transferred to the starting end of the second conveying line; the plate is conveyed along the second conveying line, and when passing through the B face detection station, the detection sensor scans the B face of the plate to obtain the B face detection data Compared with the prior art, the present application has the following advantages: by arranging the first conveying line and the second conveying line and configuring the turnover receiving mechanism therebetween, a double-face detection device with stable and reliable turnover process is constructed. Specifically, the turnover receiving mechanism is composed of a turnover device and a receiving device, and the turnover device is integrated with a limiting mechanism. When the first material taking mechanism moves the plate into the folding plate of the turnover device, the limiting mechanism is immediately started, the limiting block of the limiting mechanism extends into the positioning cavity above the folding plate through the inner groove, and abuts against the upper surface of the plate, thereby realizing the horizontal and vertical double-directional constraint of the plate, and the plate is firmly limited in the positioning cavity.

[0014] Then, the receiving device moves towards the turnover device, and in this process, the folding plate is driven by the transmission assembly to perform a turnover action, and the plate is flipped from the A face upwards to the A face downwards. When the folding plate is turned to the 180° horizontal position, the receiving seat moves to the lower side thereof, so that the positioning cavity is accurately aligned with the upper cavity of the receiving seat. At this time, the limiting mechanism is triggered to automatically withdraw the limiting block, and the plate falls smoothly into the upper cavity under the action of gravity, thereby completing the flipping process of the A and B faces.

[0015] Then, the receiving seat moves away from the turnover device, and the folding plate is synchronously rotated and reset through the transmission mechanism. When the receiving seat moves to the lower side of the second material taking mechanism, the folding plate is also completely reset. Finally, the second material taking mechanism grabs and moves the plate with the flipped face to the second conveying line.

[0016] In summary, through the cooperation of the limiting mechanism and the turnover device, the present application realizes the omnibearing positioning and stable transmission of the plate during the turnover process, effectively solves the risk of plate falling caused by the dependence on the suction disc grabbing in the existing double-face detection device, and significantly improves the safety of the turnover process and the continuity of the detection process. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the structures shown in the drawings without any creative labor.

[0018] Figure 1 The structure schematic diagram of the present application is shown in the figure. Figure 2 The structure schematic diagram of the present application is shown in the figure. Figure 3 The structure schematic diagram of the present application is shown in the figure. Figure 4 The structure schematic diagram of the present application is shown in the figure. Figure 5 The structure schematic diagram of the present application is shown in the figure. Figure 6 The structure schematic diagram of the present application is shown in the figure. Figure 7 The structure schematic diagram of the present application is shown in the figure. Figure 8 The structure schematic diagram of the present application is shown in the figure. The application number information is as follows: The first conveying line; 2, the second conveying line; 3, the turnover device; 4, the receiving device; 5, the mounting column; 6, the first material taking mechanism; 7, the second material taking mechanism; 301, the turnover frame; 302, the folding plate; 303, the positioning cavity; 304, the inner groove; 305, the pushing cylinder; 306, the connecting plate; 307, the limiting block; 308, the transmission gear; 309, the positioning notch; 401, the base; 402, the receiving seat; 403, the driving device; 404, the upper cavity; 405, the rack; 501, the guide block; The implementation, functional characteristics and advantages of the present application will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION

[0019] The following will combine the drawings in the embodiments of the present application Figures 1-8 The technical solutions in the embodiments of the present application are described clearly and completely, obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative labor are within the protection scope of the present application.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0021] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0022] like Figures 1-8 As shown: The present invention provides a thin plate double-sided inspection device, the core of which lies in constructing a continuous inspection production line with integrated automatic flipping function. The device mainly consists of a first conveyor line 1, a second conveyor line 2, a flipping receiving mechanism disposed between the two, and a first material handling mechanism 6 and a second material handling mechanism 7.

[0023] The first conveyor line 1, serving as the material feeding and A-side inspection section, typically employs a roller conveyor or belt conveyor, with its drive motor electrically connected to the control unit. Its primary function is to smoothly feed the sheet material to be inspected (such as thin metal sheets or glass plates), ensuring that the A-side of the material faces upwards. When the sheet material moves along the conveyor line to the preset A-side inspection station, a vision inspection system (such as a CCD camera) mounted above the station, or an operator, captures images or performs manual observation to complete the quality inspection of the A-side and obtain A-side inspection data, thus achieving a streamlined and automated A-side inspection process.

[0024] The second conveyor line 2, serving as the B-side inspection and unloading section, has a similar structure to the first conveyor line 1. Its main function is to receive boards that have undergone A-side inspection and flipping, and then convey them through the B-side inspection station. Upon reaching the B-side inspection station, inspection is performed using sensors or manual methods. When using sensors, the upward-facing B-side is scanned to obtain B-side inspection data. By setting up two independent conveyor lines, this invention achieves spatial separation and seamless connection of the A and B-side inspection processes, effectively avoiding process interference and efficiency reduction that might be caused by single-line backflow, and improving the overall inspection cycle time. Furthermore, the horizontal height of the second conveyor line 2 is lower than that of the first conveyor line 1.

[0025] To achieve stable flipping of the sheet material between the two conveyor lines, a flipping and receiving mechanism is installed between the first conveyor line 1 and the second conveyor line 2. This mechanism is key to achieving stable flipping in this invention, as it links the flipping and receiving actions through mechanical transmission. The flipping and receiving mechanism consists of a flipping device 3 and a receiving device 4, with the receiving device 4 and the flipping device 3 connected by a transmission assembly. This connection allows the horizontal linear motion of the receiving device 4 to be precisely converted into the rotational motion of the flipping device 3. The flipping and receiving actions are synchronously controlled by a single drive source (drive device 403), which not only simplifies the control system and reduces costs, but more importantly, ensures precise timing and positional matching between the flipping and receiving actions.

[0026] It also includes a control system, which includes a controller and a human-machine interface touch screen. This system is used to receive signals from various sensors (such as when the material is in place or when the flipping is completed), control the start and stop of the conveyor line, control the action of the positioning and stopping mechanism, control the movement trajectory of the first material picking mechanism 4 and the second material picking mechanism 5 and the extension and retraction of the push cylinder 305, control the movement of the receiving device 4, control the precise start and stop and angle of the flipping device, and communicate with the detection system to obtain and record the detection results.

[0027] like Figures 2-3 As shown in Figures 5-6, the flipping device 3 includes a fixedly mounted flipping frame 301 and a folding plate 302 rotatably disposed within the flipping frame 301 via a rotating shaft. The folding plate 302 has a positioning cavity 303 adapted to the shape of the material to be tested. This positioning cavity 303 is used to accommodate and initially position the material during the flipping process. The folding plate 302 also integrates a limiting mechanism, which presses and fixes the material after it is placed in the positioning cavity 303, preventing it from shifting or falling off due to inertia or vibration during high-speed flipping. The beneficial effect of this flipping device 3 is that it provides a rigid carrier (i.e., the folding plate 302) with precise positioning and locking functions for the flipping process of the material, replacing the unstable traditional method that relies solely on suction cup adsorption.

[0028] The specific composition of the limit mechanism is as follows: Figures 6-8As shown, it includes multiple pushing cylinders 305 disposed in the inner grooves 304 on both sides of the folding plate 302. A connecting plate 306 is fixed to the piston rod end of each pushing cylinder 305, and a limiting block 307 for directly abutting the upper surface of the plate is installed at the end of the connecting plate 306 away from the cylinder. The inner groove 304 is connected to the positioning cavity 303, allowing the limiting block 307 to extend into or retract from the positioning cavity 303 through the inner groove 304 under the drive of the pushing cylinders 305. When the limiting block 307 extends, its lower end face presses against the upper surface of the plate, achieving complete constraint of the plate in both the vertical and horizontal directions through its cooperation with the sidewall of the positioning cavity 303. Its advantages are that by using mechanical rigid limiting instead of pure vacuum adsorption, the limiting force is greater and more reliable, unaffected by oil stains, dust, or aging of the suction cup on the plate surface, greatly improving the stability and safety of the flipping process.

[0029] like Figures 2-3 As shown, the receiving device 4 includes a base 401 fixed to the equipment base and a receiving seat 402 slidably mounted on the base 401 via a linear guide slider mechanism. A driving device 403 is mounted on the base 401 to drive the receiving seat 402 to reciprocate along the length of the base. This driving device 403 is preferably a ball screw module driven by a servo motor to ensure positioning accuracy. The upper surface of the receiving seat 402 has an upper cavity 404 for receiving the flipped plate. The beneficial effect of this receiving device 4 is that, as a movable receiving platform, it can not only accurately move under the flipping plate 302 to catch the falling plate, but also drive the entire flipping process through its movement.

[0030] The transmission component is the core component that enables the receiving device 4 and the flipping device 3 to move in unison. Figures 2-4 As shown, it includes racks 405 fixedly mounted on both sides of the receiving seat 402, and transmission gears 308 fixedly mounted on the rotating shafts on both sides of the folding plate 302. When the receiving seat 402 moves horizontally under the drive of the drive device 403, the racks 405 move synchronously. Since the racks 405 and transmission gears 308 are always meshed, the linear motion of the racks 405 is converted into the rotational motion of the transmission gears 308, thereby driving the folding plate 302 to rotate precisely around its rotating shaft. By accurately calculating the effective stroke of the racks 405, it can be ensured that when the receiving seat 402 moves from one extreme position to another, it drives the folding plate 302 to complete a 180° flip. The above-mentioned rack and pinion transmission method has the characteristics of high precision, high efficiency and high rigidity. The transmission ratio is constant, and it can accurately convert the linear displacement of the receiving seat into the rotation angle of the folding plate, ensuring that the end position of the flipping action is accurate and reliable.

[0031] To ensure the stability of rack 405 during long-stroke motion and prevent deformation or vibration due to its own weight or meshing reaction force, such asFigures 1-4 As shown, a mounting post 5 is provided on the side of the receiving device 4 near the flipping device 3. A guide block 501 is fixed to the top of the mounting post 5, and a groove matching the cross-section of the rack 405 is formed on the guide block 501. The rack 405 is inserted into and passes through the groove, forming a sliding engagement. This guide structure provides an additional support point for the rack 405, effectively increasing the rigidity of the rack and ensuring the stability of the rack 405 and the transmission gear 308 during the entire meshing process, thereby improving the smoothness and accuracy of the transmission and extending the service life of the mechanism.

[0032] like Figure 1 and Figure 4 As shown: To achieve automatic transfer of sheet metal between the conveyor line and the flipping station, this invention also includes a first picking mechanism 6 and a second picking mechanism 7. The first picking mechanism 6 spans across the end of the first conveyor line 1 and above the flipping device 3 via its frame. Its function is to accurately transfer the sheet metal that has completed A-side inspection and is located at the end of the first conveyor line 1 into the positioning cavity 303 of the flipping plate 302 of the flipping device 3. Similarly, the second picking mechanism 7 spans across the receiving device 4 and the starting end of the second conveyor line 2, and is used to transfer the sheet metal that has been flipped on the receiving device 4 to the second conveyor line 2. These two picking mechanisms realize the complete automation of sheet metal transfer between processes, forming a closed automated production line, significantly improving production efficiency, and reducing quality fluctuations and safety hazards caused by manual intervention.

[0033] like Figure 1 As shown, both the first picking mechanism 6 and the second picking mechanism 7 adopt the same modular design, including a robust picking rack, a multi-axis motion module mounted on the picking rack (such as a two-dimensional gantry-type Cartesian coordinate robot, containing linear modules with X and Z axes), and a vacuum suction cup array connected to the Z-end of the multi-axis motion module. The vacuum suction cup array is laid out according to the size and weight of the sheet material to provide uniform and sufficient suction force. The multi-axis motion module enables precise and rapid positioning of the suction cup array in three-dimensional space, while the vacuum suction cup array provides a gentle and reliable gripping method, suitable for thin sheets with high surface quality requirements, avoiding scratches or deformation that may be caused by mechanical clamping.

[0034] like Figure 3As shown: To ensure the positional accuracy of the folding plate 302 in its non-flipped state, a positioning slot 309 is provided on one side of the flipping frame 301. When the folding plate 302 is in its initial (horizontal) receiving position or after resetting, its edge will abut against the positioning slot 309, serving as a mechanical limit. Simultaneously, a sufficiently large clearance groove is provided on the side of the flipping frame 301 away from the positioning slot 309. This clearance groove provides uninterrupted movement space for the folding plate 302 when performing a 180° flipping action. The positioning slot 309 ensures that the folding plate 302 returns to a uniquely defined position before each flip and after resetting, thereby guaranteeing the repeatability of the positioning accuracy for loading and unloading materials; while the clearance groove design ensures that the flipping action can be completed smoothly.

[0035] This invention also provides a detection method using the above-mentioned thin plate double-sided inspection equipment. The method has a clear process and a high degree of automation, and specifically includes the following steps: S1: Loading and A-side inspection. The board to be inspected is placed on the first conveyor line 1 with the A-side facing upwards. The board moves forward at a constant speed with the first conveyor line 1. When it passes the A-side inspection station, the A-side of the board is quickly scanned or observed by the installed detection sensor (or manually) to obtain the A-side inspection data, and the data is then linked to the board information. S2: Sheet positioning and primary transfer. After the sheet arrives at the waiting position at the end of the first conveyor line 1, it is precisely positioned by a positioning sensor and a stop mechanism. Subsequently, the multi-axis motion module of the first picking mechanism 6 drives the vacuum suction cup array to move directly above the sheet and then downwards. The vacuum suction cup array contacts and adsorbs the sheet. The system monitors the stability of the adsorption state through a vacuum pressure sensor. After confirming that there is no problem, the suction cup array picks up the sheet and moves it upwards, laterally, and finally downwards, precisely releasing the sheet into the positioning cavity 303 of the flipping plate 302 of the flipping device 3. This achieves a non-destructive, precise, and automated transfer of the sheet from the conveyor line to the flipping station. S3: Plate limiting. Once the plate is embedded in the positioning cavity 303 of the folding plate 302, the limiting mechanisms located on both sides of the positioning cavity 303 immediately activate. Their push cylinders 305 push the connecting plate 306 and the limiting block 307 outwards, causing the limiting block 307 to firmly abut against the upper surface of the plate. At this point, the plate is completely fixed in the positioning cavity 303, with no remaining degrees of freedom. The beneficial effect of this step is that by replacing pure adsorption with rigid limiting, it provides fundamental safety assurance for subsequent high-speed, large-angle flipping. S4: Plate flipping. Driven by the drive device 403, the receiving base 402 begins to move horizontally towards the side closer to the flipping frame 301. During the movement, the rack 405 fixed on the receiving base 402 moves synchronously and drives the transmission gear 308 meshing with it to rotate, thereby causing the flipping plate 302 and the plate fixed inside it to rotate horizontally by 180°. The above process utilizes precise mechanical transmission to perfectly couple horizontal movement and rotation flipping, resulting in smooth operation and accurate positioning. S5: Plate Limit Release and Receiving. After the folding plate 302 rotates 180°, the originally upward-facing A-side becomes downward-facing. At this time, the receiving seat 402 has also moved synchronously to directly below the folding plate 302, and the upper cavity 404 of the receiving seat 402 is vertically aligned with the positioning cavity 303 of the folding plate 302. Subsequently, the limiting mechanism receives a control signal, the push cylinder 305 retracts, and the limiting block 307 exits from the positioning cavity 303, releasing the constraint on the plate. Under the action of gravity, the plate falls smoothly into the upper cavity 404 of the receiving seat 402. This step ensures that the endpoints of the flipping and receiving actions are precisely designed to be at the same moment, achieving a seamless and smooth transfer of the plate from the flipping carrier to the receiving carrier. S6: Secondary Transfer and B-Side Inspection. The receiving seat 402, carrying the flipped sheet material, begins its return to the initial position. During the return process, the reverse transmission of the transmission component synchronously drives the folding plate 302 to rotate and reset. When the receiving seat 402 moves below the second material handling mechanism 7, the folding plate 302 is also fully reset. Next, the vacuum suction cup array of the second material handling mechanism 7 descends, adsorbs the sheet material on the receiving seat 402, and transfers it to the starting end of the second conveyor line 2. The sheet material is then conveyed by the second conveyor line 2, and when it passes the B-side inspection station, the B-side is scanned and inspected to obtain the B-side inspection data. The above completes the closed-loop process of the entire double-sided inspection, realizing automatic unloading of the flipped sheet material and automatic inspection of the second side, with a smooth and efficient process.

[0036] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A double-sided inspection device for thin plates, comprising a first conveyor line (1) for feeding in the plate and completing the inspection of side A of the plate, and a second conveyor line (2) for feeding out the plate and completing the inspection of side B of the plate, characterized in that: A flipping receiving mechanism is provided between the first conveyor line (1) and the second conveyor line (2). The flipping receiving mechanism includes a flipping device (3) for receiving the plate from the first conveyor line (1) and realizing its horizontal flipping, and a receiving device (4) for receiving the flipped plate. The receiving device (4) and the flipping device (3) are connected by a transmission component, so that the receiving device (4) drives the flipping device (3) to perform the flipping action during horizontal movement.

2. The thin plate double-sided inspection device according to claim 1, characterized in that: The flipping device (3) includes a flipping frame (301) and a folding plate (302) rotatably disposed in the flipping frame (301). The folding plate (302) is provided with a positioning cavity (303) for accommodating the plate, and a limiting mechanism is provided in the folding plate (302) to restrict the movement of the plate in the positioning cavity (303).

3. The thin plate double-sided inspection device according to claim 2, characterized in that: The limiting mechanism includes a plurality of push cylinders (305) disposed in the inner grooves (304) on both sides of the folding plate (302). A connecting plate (306) is fixed on the piston rod of each push cylinder (305). A limiting block (307) for abutting against the upper surface of the plate is provided at one end of the connecting plate (306) away from the push cylinder (305). The inner groove (304) is connected to the positioning cavity (303). The limiting block (307) extends into the positioning cavity (303) through the inner groove (304).

4. The thin plate double-sided inspection device according to claim 2, characterized in that: The receiving device (4) includes a base (401) and a receiving seat (402) slidably disposed on the base (401). The base (401) is provided with a driving device (403) for driving the receiving seat (402) to move along the extension direction of the base (401). The receiving seat (402) is provided with an upper cavity (404) for holding the flipped plate.

5. A double-sided inspection device for thin plates according to claim 4, characterized in that: The transmission assembly includes racks (405) disposed on both sides of the receiving seat (402) and transmission gears (308) installed on both sides of the folding plate (302). The racks (405) move accordingly with the movement of the receiving seat (402) and mesh with the transmission gears (308). The folding plate (302) is rotated 180° through the cooperation of the racks (405) and the transmission gears (308).

6. The thin plate double-sided inspection device according to claim 5, characterized in that: A mounting post (5) is provided on the side of the receiving device (4) near the flipping device (3). A guide block (501) is provided on the top of the mounting post (5). A sliding groove is provided on the guide block (501). The rack (405) slides in cooperation with the sliding groove.

7. The thin plate double-sided inspection device according to claim 1, characterized in that: It also includes a first material handling mechanism (6) and a second material handling mechanism (7). The first material handling mechanism (6) spans the first conveyor line (1) and the flipping device (3) and is used to transfer the board located at the end of the first conveyor line (1) to the flipping device (3). The second material handling mechanism (7) spans the receiving device (4) and the second conveyor line (2) and is used to transfer the board that has been flipped on the receiving device (4) to the starting end of the second conveyor line (2).

8. A double-sided inspection device for thin plates according to claim 7, characterized in that: The first material handling mechanism (6) and the second material handling mechanism (7) both include a material handling frame, a multi-axis motion module disposed on the material handling frame, and a vacuum suction cup array connected to the multi-axis motion module.

9. A double-sided inspection device for thin plates according to claim 2, characterized in that: The flipping frame (301) has a positioning slot (309) on one side for abutting the folding plate (302), and the flipping frame (301) has an avoidance slot on the side away from the positioning slot (309) for the folding plate (302) to flip.

10. A detection method using the double-sided inspection equipment for thin plates according to any one of claims 1-9, characterized in that, Includes the following steps: S1: Loading and A-side inspection: Place the board to be inspected on the first conveyor line (1) with the A-side facing up; the board is conveyed along the first conveyor line (1), and when it passes the A-side inspection station, the A-side of the board is inspected or scanned by manual inspection or inspection sensor to obtain A-side inspection data; S2: Plate positioning and one-time transfer. The plate arrives at the waiting position at the end of the first conveyor line (1) and is precisely positioned. The vacuum suction cup array of the first material picking mechanism (6) descends to adsorb the plate. The adsorption state is monitored by the vacuum pressure sensor. After confirming that it is stable, the plate is transferred to the folding plate (302) of the flipping device (3). S3: Plate limiting, the plate is embedded in the positioning cavity (303) of the folding plate (302), the limiting mechanism on both sides of the positioning cavity (303) extends out and abuts against the upper surface of the plate, fixing the plate in the positioning cavity (303); S4: The plate is flipped, and the receiving seat (402) is driven by the driving device (403) to move to the side closer to the flipping frame (301), while the folding plate (302) is driven to rotate horizontally by 180° through the transmission component; S5: The plate limit is released. After the flip is completed, the limiting mechanism that abuts against the bottom of the plate retracts into the inside of the folding plate (302). At this time, the receiving seat (402) moves synchronously to the bottom of the folding plate (302), and the plate falls onto the receiving seat (402) under the action of gravity. S6: Secondary transfer and B-side detection. After receiving the board, the receiving seat (402) returns to the initial position and simultaneously drives the folding plate (302) to reset. The receiving seat (402) moves to the bottom of the second material handling mechanism (7). The vacuum suction cup array of the second material handling mechanism (7) descends to adsorb the board that has been flipped and transfers it to the starting end of the second conveyor line (2). The board is conveyed along the second conveyor line (2). When it passes the B-side detection station, the detection sensor scans the B-side of the board and obtains the B-side detection data.

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