Rivet missing detection device and detection sorting system

Abstract

The utility model belongs to the technical field of detection equipment, and provides a rivet missing detection device which comprises a base, a conveying belt, a limiting frame and a top cover, and the conveying belt moves a workpiece within the surrounding range of the limiting frame; the top cover is located above the limiting frame, window shades capable of being unfolded or folded are arranged on the two sides of the top cover, and the top cover, the limiting frame and the window shades unfolded towards the two sides of the limiting frame define a darkroom surrounding the upper portion of a workpiece. A reflecting plate is arranged on the top cover, a light source located below the surrounding range of the limiting frame is arranged on the base, and the light source irradiates a workpiece located in the limiting frame, so that the projection of the workpiece is projected on the reflecting plate; an image acquisition device is arranged on the limiting frame and is used for acquiring a projection image on the reflecting plate and uploading the projection image to an upper computer. The utility model further provides a detecting and sorting system with the rivet leakage detecting device. The technical problem that the cost is increased due to the fact that different auxiliary parts need to be manufactured when products of different specifications are detected through existing rivet missing detection equipment is solved.

Description

Technical Field

[0001] This application belongs to the technical field of product testing equipment in the production process, and particularly relates to a missing rivet detection device and a testing and sorting system. Background Technology

[0002] With continuous social progress and rapid technological development, the market demand for many products is increasing, and the requirements are also becoming more stringent. Therefore, it is essential to both ensure product quality and improve production efficiency to meet market demands. Currently, many products use rivets, and misinstallation or omissions are prone to occur during the production process, necessitating inspection of finished products. Traditional inspection methods generally fall into two categories: visual inspection using the naked eye and light transmission inspection through rivet holes. For visual inspection, the results rely on observing light leakage with the naked eye. Operators need to be in a state of observation for extended periods, which can easily lead to incorrect judgments. This is especially true when other pre-drilled mounting holes are present on the product, which can easily cause visual confusion, affecting inspection efficiency and stability.

[0003] For rivet hole light transmission inspection, it offers higher stability compared to manual visual inspection, but it also suffers from complexity and high cost. Different auxiliary carrier plates need to be fabricated for inspecting products of different specifications, increasing production costs.

[0004] Therefore, the existing methods for detecting missing rivets still have many shortcomings and do not meet the current inspection requirements of production lines. Utility Model Content

[0005] The purpose of this application is to provide a missing rivet detection device and a detection and sorting system to solve the technical problem that existing missing rivet detection equipment requires the manufacture of different auxiliary parts for detecting products of different specifications, which leads to increased costs.

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

[0007] In a first aspect, embodiments of this application provide a missing rivet detection device, including a base and a conveyor belt, a limiting frame, and a top cover disposed on the base. The conveyor belt is used to move the workpiece within the surrounding area of ​​the limiting frame. The top cover is located above the limiting frame, and light-shielding curtains that can be unfolded or retracted are provided on both sides of the top cover. The top cover, the limiting frame, and the light-shielding curtains that unfold to both sides of the limiting frame together form a dark chamber that encloses the workpiece.

[0008] The top cover is provided with a reflector, and the base is provided with a light source located below the area surrounded by the limiting frame. The light source illuminates the workpiece located within the limiting frame, so that the projection of the workpiece is projected onto the reflector. The limiting frame is provided with an image acquisition device, which is used to acquire the projected image on the reflector and upload it to the host computer.

[0009] In this way, a dark chamber is formed by the top cover, the limiting frame, and the light-blocking curtains that extend to both sides of the limiting frame, which enclose the workpiece. By acquiring images of the workpiece in the dark chamber, the contamination caused by light pollution from the external environment or dust entering from the outside can be effectively eliminated, which helps to improve the clarity and accuracy of the images, thereby improving the accuracy and stability of the detection.

[0010] The structure of the light-blocking curtain is improved. The light-blocking curtain includes a fabric curtain, a storage compartment, a rotating shaft, and a drive mechanism for rotating the rotating shaft. The storage compartment is mounted on a base, and the fabric curtain is wound around the rotating shaft. The rotating shaft, located within the storage compartment, is driven by the drive mechanism to rotate in both directions, causing the fabric curtain to unfold or retract. In this way, the light-blocking curtain can unfold only after the workpiece has moved into position, creating a dark chamber on the conveyor belt for workpiece inspection, blocking external light from entering the dark chamber. After inspection, the light-blocking curtain automatically resets, allowing the workpiece to be easily moved out of the inspection area for convenient removal.

[0011] In one embodiment, a light-blocking plate is connected to the extended end of the curtain, and the light-blocking plate can move with the curtain. This allows the light-blocking plate to act as a counterweight on the extended end of the curtain, enabling the curtain to be fully extended, and also fills any light leaks that occur when the curtain is not fully extended, effectively improving the airtightness of the darkroom.

[0012] The structure of the base is improved by including a movable stop that can be driven to stand up or reset. This movable stop is used to stop the workpiece as it is moved by the conveyor belt into the area enclosed by the limiting frame. By using the movable stop to stop the workpiece, the workpiece is allowed to move into position within the limiting frame, ensuring that the workpiece remains within the range of the limiting frame.

[0013] In one embodiment, a pair of guide blocks protruding toward the center of the limiting frame are provided on both sides of the base. The opposite end faces of the pair of guide blocks are guide surfaces for correcting the movement path of the workpiece. The distance between the guide surfaces on the pair of guide blocks gradually decreases toward the movable stop, thereby correcting the posture of the workpiece when it reaches the limiting frame.

[0014] The structure of the limiting frame is improved, with a frame opening for exposing the workpiece. Multiple image acquisition devices are evenly distributed on the limiting frame body surrounding the frame opening. This allows for multi-angle imaging of the workpiece projection on the reflector using multiple image acquisition devices, effectively ensuring the integrity of the projected image of the inspected workpiece.

[0015] Secondly, embodiments of this application also provide an inspection and sorting system, including a first loading tray, a second loading tray, and a third loading tray, a robot, and the aforementioned missing rivet detection device: the first loading tray, the second loading tray, and the third loading tray are respectively used to place workpieces; the robot is configured to pick up workpieces from the first loading tray and place them on the missing rivet detection device for inspection, and place qualified workpieces on the second loading tray, or unqualified workpieces on the third loading tray. Thus, by using a robot to replace manual labor for loading and sorting of inspected workpieces, work stability and efficiency are effectively improved.

[0016] The structure of the material carriers is improved so that the first, second, and third material carriers each include a loading box, and the loading box contains a grid for placing workpieces. The material carriers also have multiple dividing slots for placing the loading boxes, and these slots are arranged in an orderly manner along the length of the material carrier. This facilitates the operator in quickly counting the number of workpieces, thereby improving work efficiency.

[0017] In one embodiment, sensors are diagonally arranged on both sides of the loading bin, and sensing parts are located on the side walls of each of the partition slots on the material tray. These sensing parts are used to engage with the sensors on the loading bin. Thus, the diagonally arranged sensors on the loading bin allow the loading bin to operate regardless of orientation, enabling automatic alignment between the chips on the loading bin and the sensing parts on the material tray, thereby improving positional adaptability.

[0018] The robot's structure is improved by including a first robotic arm and a second robotic arm. The first robotic arm is configured to transfer workpieces from the first loading tray to the conveyor belt of the missing rivet detection device; the second robotic arm is configured to transfer workpieces removed from the darkroom to the second loading tray or the third loading tray. Thus, by utilizing two robotic arms to perform workpiece feeding and sorting operations respectively, operational efficiency and accuracy are effectively improved.

[0019] The beneficial effects of the missing rivet detection device and detection sorting system provided in this application are as follows: Compared with the prior art, the detection sorting system of this application uses robots to replace human hands for feeding and sorting of the detected workpieces, which effectively improves work stability and work efficiency.

[0020] The missing rivet detection device of this application includes a conveyor belt, a limiting frame, and a top cover. The top cover has light-shielding curtains on both sides that can be unfolded or retracted. A light source located below the limiting frame illuminates the workpiece, causing its projection to be projected onto a reflector on the top cover. An image acquisition device mounted on the limiting frame acquires an image of the workpiece projection on the reflector and uploads it to a host computer. The host computer performs image comparison, thereby quickly determining whether the workpiece has missing rivets, effectively improving detection efficiency.

[0021] The missing rivet detection device of this application can be used to inspect workpieces of different specifications, effectively improving the versatility of the device. It eliminates the need to manufacture different detection auxiliary plates based on the rivet layout of the workpiece, and utilizes image acquisition and image comparison to achieve detection, effectively reducing production costs. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a three-dimensional structural diagram of the detection and sorting system provided in the embodiments of this application;

[0024] Figure 2 This is a top view of the detection and sorting system provided in the embodiments of this application;

[0025] Figure 3 This is a three-dimensional structural diagram of the missing rivet detection device provided in the embodiments of this application;

[0026] Figure 4 Exploded view of the rivet detection device provided in the embodiments of this application Figure 1 ;

[0027] Figure 5 A top view of the base provided in an embodiment of this application;

[0028] Figure 6 This is a schematic diagram of the internal structure of the missing rivet detection device provided in the embodiments of this application;

[0029] Figure 7Exploded view of the rivet detection device provided in the embodiments of this application Figure 2 ;

[0030] Figure 8 Schematic diagram of the three-dimensional structure of the base provided in the embodiments of this application Figure 1 ;

[0031] Figure 9 This is a schematic diagram of the structure between a pair of guide blocks provided in an embodiment of this application;

[0032] Figure 10 for Figure 8 A partially enlarged schematic diagram of the A-section structure;

[0033] Figure 11 Schematic diagram of the three-dimensional structure of the base provided in the embodiments of this application Figure 2 ;

[0034] Figure 12 This is a schematic diagram of the assembly structure of the material carrier tray provided in the embodiments of this application;

[0035] Figure 13 This is a top view of the loading box provided in an embodiment of this application.

[0036] The following are the labeling elements in the figure:

[0037] 100 - Missing rivet detection device; 200 - Workpiece;

[0038] 11-First loading tray; 12-Second loading tray; 13-Third loading tray; 14-Loading box; 141-Grid; 142-Sensing element; 15-Divider groove; 151-Gate opening; 16-Divider plate; 17-Guide rib; 18-Sensing part;

[0039] 2-Robot; 21-First robotic arm; 22-Second robotic arm;

[0040] 3-Base; 31-Light source; 32-Enclosure; 321-Limiting groove; 33-Modible stop; 34-Guide block; 341-Elongated hole; 35-Adjusting hole;

[0041] 4-Conveyor belt; 41-First rolling belt; 42-Second rolling belt; 43-Third rolling belt;

[0042] 5-Limiting frame; 50-Frame opening; 51-Image acquisition device; 52-Inclined surface;

[0043] 6-Top cover; 61-Reflector;

[0044] 7-Blackout curtain; 71-Fabric curtain; 72-Storage compartment; 73-Blackout panel. Detailed Implementation

[0045] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0046] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0047] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0049] In traditional rivet inspection equipment, whether there are missing rivets on the workpiece is generally determined by manual naked-eye inspection or light transmission inspection of the rivet hole. Light transmission inspection of the rivet hole is more stable than manual naked-eye inspection.

[0050] For rivet hole light transmission detection, related technologies employ a detection auxiliary plate with light-transmitting holes that correspond one-to-one with the locations on the workpiece where rivets are required. During detection, the workpiece is placed on the detection auxiliary plate, and a light source is used to illuminate it to determine if the light-transmitting holes are blocked. If a rivet is installed at that location on the workpiece, it will block the corresponding light-transmitting hole on the detection auxiliary plate; if a rivet is missing from that location, it will not block the corresponding light-transmitting hole. This enables rapid detection and improves the efficiency of missing rivet detection.

[0051] It is evident that the detection auxiliary plate needs to be designed according to the layout of the rivet positions on the workpiece to be inspected. When this light-transmitting detection device inspects workpieces of different specifications, it is necessary to manufacture detection auxiliary plates with different light-transmitting hole layouts to perform the inspection, which increases production costs and is not conducive to practical application.

[0052] Therefore, this application provides a novel rivet detection device and detection sorting system. The light transmission detection mechanism on the device is redesigned, and rivet detection is performed by image comparison. There is no need to manufacture different detection auxiliary plates, which effectively solves the problem that traditional rivet detection equipment requires the manufacture of different detection auxiliary plates according to the layout of the rivet positions on the workpiece, resulting in increased production costs. The details are described below.

[0053] Please refer to the following: Figure 1 and Figure 2 The detection and sorting system includes a first loading tray 11, a second loading tray 12, a third loading tray 13, a robot 2, and a missing rivet detection device 100 provided in the embodiments of this application.

[0054] The first loading tray 11, the second loading tray 12, and the third loading tray 13 are used to place the workpiece 200. The first loading tray 11 is located near the input end of the missing rivet detection device 100, and the second loading tray 12 and the third loading tray 13 are both located near the output end of the missing rivet detection device 100, so that each loading tray is within the range of motion of the robot 2.

[0055] Robot 2 is configured to pick up workpiece 200 from the first loading tray 11 and place it on the missing rivet detection device 100 for inspection. It then places the qualified workpiece 200 on the second loading tray 12 or the unqualified workpiece 200 on the third loading tray 13, thereby realizing the missing rivet detection and automatic sorting operation of workpiece 200, effectively replacing manual inspection and improving inspection efficiency.

[0056] "Workpieces that pass inspection" can be understood as workpieces 200 that have no missing rivet parts as confirmed by the device inspection; "workpieces that fail inspection" can be understood as workpieces 200 that have missing rivet parts as confirmed by the device inspection.

[0057] Please refer to the following: Figure 2 , Figure 3 and Figure 4 The missing rivet detection device 100 includes a base 3 and a conveyor belt 4, a limiting frame 5 and a top cover 6 disposed on the base 3.

[0058] like Figure 4 and Figure 5As shown, the limiting frame 5 is located on at least a portion of the conveyor belt 4, which is used to move the workpiece 200 within the surrounding area of ​​the limiting frame 5. In this embodiment, the limiting frame 5 is preferably a frame structure with a surrounding area larger than the area of ​​the workpiece 200. When the workpiece 200 moves into the limiting frame 5 on the conveyor belt 4, the workpiece 200 is within the downward vertical projection range of the limiting frame 5.

[0059] In this embodiment, as Figure 5 As shown, the conveyor belt 4 on the base 3 can be divided into a first area M1, a second area M2 and a third area M3 along its length. The first area M1 is used for feeding, moving the workpiece 200 to be inspected towards the area of ​​the limiting frame 5. The limiting frame 5 is set in the second area M2. The third area M3 is used for discharging, and the inspected workpiece 200 is moved out of the limiting frame 5 from the third area M3, so that the robot 2 can take away the inspected workpiece 200.

[0060] like Figure 3 , Figure 4 and Figure 6 As shown, the top cover 6 is located above the limiting frame 5, and movable light-shielding curtains 7 are provided on both sides of the top cover 6. These light-shielding curtains 7 can be driven to unfold to both sides of the limiting frame 5 below or to retract and reset. Thus, the top cover 6, the limiting frame 5, and the light-shielding curtains 7 unfolding to both sides of the limiting frame 5 together form a darkroom N enclosing the workpiece 200. Here, "darkroom" can be understood as an enclosed space into which external light cannot enter.

[0061] A reflector 61 is provided on the top cover 6, specifically at the bottom of the top cover 6, with the reflective surface of the reflector 61 facing downwards. A light source 31 is provided on the base 3, which is preferably a lamp, and the lamp is preferably configured as a light-emitting plate structure embedded in the base 3. The light source 31 is located below the area surrounded by the limiting frame 5, so that the workpiece 200 within the area surrounded by the limiting frame 5 is simultaneously within the illumination range of the light source 31.

[0062] like Figure 6 As shown, the light source 31 is used to illuminate the workpiece 200 located within the limiting frame 5, so that the projection of the workpiece 200 is projected onto the reflector 61. An image acquisition device 51 is provided on the limiting frame 5, which can preferably be a camera mounted on the limiting frame 5, and these cameras are configured to face the reflector 61. The image acquisition device 51 is used to acquire the projected image on the reflector 61 and upload it to a host computer (not shown in the figure).

[0063] Therefore, an image comparison is performed using a host computer. Specifically, the host computer can store a projection image of a workpiece 200 that meets the requirements after being illuminated by the light source 31. By comparing the stored projection image with the uploaded projection image, it is possible to quickly determine whether there are any missing rivet parts on the workpiece 200. When the workpiece 200 is moved out of the limiting frame 5, the robot 2 transfers the workpiece 200 to the second loading tray 12 or the third loading tray 13 according to the detection result, completing the detection and sorting operation.

[0064] It should be noted that the robot 2, image acquisition device 51, and host computer mentioned above all utilize their inherent functions. For example, robot 2 can be a parallel robot 2 or a robotic arm, etc., which has the function of transferring objects to a designated position according to instructions; image acquisition device 51 has the function of automatically acquiring images; and the host computer can preferably be a control host such as a computer, which has internal storage functions and comparison computing capabilities. These devices can be linked and controlled, and the corresponding operations can be achieved using existing commonly used linkage control methods, such as using the acquired images for recognition, and the parallel robot performing corresponding operations based on the recognized information, etc. This application does not involve improvements to their functions or control methods.

[0065] Compared with the prior art, the rivet detection device 100 and detection and sorting system provided in this application use a robot 2 to replace human hands for feeding and sorting the detected workpieces 200, which effectively improves work stability and work efficiency.

[0066] For missing rivet detection, the missing rivet detection device 100 of this application includes a conveyor belt 4, a limiting frame 5, and a top cover 6. The top cover 6 has light-shielding curtains 7 on both sides that can be unfolded or retracted. A light source 31 located below the limiting frame 5 illuminates the workpiece 200, causing the projection of the workpiece 200 to be projected onto a reflector 61 on the top cover 6. An image acquisition device 51 mounted on the limiting frame 5 acquires the image of the workpiece 200 projection projected onto the reflector 61 and uploads it to a host computer. The host computer performs image comparison, thereby quickly determining whether the workpiece 200 has missing rivets, effectively improving detection efficiency.

[0067] Compared to the open image acquisition structure used in related technologies, this open structure involves setting up a rudimentary platform on which the workpiece 200 rests, with a camera positioned above the platform taking pictures of the workpiece 200 below. This open image acquisition structure is easily affected by the external environment. For example, external light intensity can affect the clarity of the captured image; or dust particles from the external environment can easily enter and reach the workpiece 200 during the imaging process, especially if they happen to be obscuring the rivet areas. These factors are likely to exist in the aforementioned open structure, thus affecting the accuracy of the detection.

[0068] As can be seen, the missing rivet detection device 100 provided in this application embodiment uses the top cover 6, the limiting frame 5 and the light-blocking curtains 7 that extend to both sides of the limiting frame 5 to form a dark chamber N that covers the workpiece 200. By acquiring images of the workpiece 200 in the dark chamber N, the contamination caused by light pollution from the external environment or dust entering from the outside is effectively eliminated, which helps to improve the clarity and accuracy of the image, thereby improving the accuracy and stability of the detection.

[0069] The missing rivet detection device 100 provided in this application embodiment can be used to detect workpieces 200 of different specifications, effectively improving the versatility of the device. It eliminates the need to manufacture different detection auxiliary plates based on the rivet layout of the workpiece 200, and achieves detection through image acquisition and image comparison. This solves the problem of increased production costs caused by the need to manufacture different detection auxiliary plates according to the rivet layout of traditional missing rivet detection equipment, effectively reducing production costs and facilitating production applications.

[0070] For the specific structure of conveyor belt 4, please refer to one embodiment of this application. Figure 5 The conveyor belt 4 is equipped with a first rolling belt 41, a second rolling belt 42, and a third rolling belt 43 according to the three regions mentioned above. The first rolling belt 41 is located in the first region M1, the second rolling belt 42 is located in the second region M2, and the third rolling belt 43 is located in the third region M3. Each rolling belt can operate synchronously or independently to perform corresponding conveying operations on the workpiece 200 according to control requirements.

[0071] For the specific structure of the active blackout curtain 7, please refer to one embodiment of this application. Figure 7 The blackout curtain 7 includes a curtain 71, a storage compartment 72, a pivot (not shown), and a drive mechanism (not shown) for driving the pivot to rotate. The storage compartment 72 is mounted on a base 3. The curtain 71 is preferably made of opaque fabric and is rolled up on the pivot. The pivot, located within the storage compartment 72, is driven to rotate in both directions by the drive mechanism, thereby causing the curtain 71 to unfold or retract.

[0072] In this embodiment, as Figure 7 As shown, the storage compartment 72 can preferably be a long rectangular strip. The bottom of the storage compartment 72 has an opening, and the rotating shaft is disposed inside the storage compartment 72 and connected to the output end of the drive mechanism. The drive mechanism can preferably be a drive motor disposed outside the storage compartment 72. The drive mechanism can drive the rotating shaft to rotate in the forward or reverse direction, so that the curtain 71 can be rolled up on the rotating shaft, or the curtain 71 can be extended from the bottom opening of the storage compartment 72 and unfolded downward as the rotating shaft rotates.

[0073] Please refer to the following during the inspection of workpiece 200: Figure 3 , Figure 5 and Figure 7 Robot 2 transfers the workpiece 200 to be inspected on the first loading tray 11 to the first area M1 of the conveyor belt 4. The conveyor belt 4 moves the workpiece 200 from the first area M1 to the second area M2, so that the workpiece 200 enters the surrounding area of ​​the limiting frame 5. At this time, the conveyor belt 4 can stop running.

[0074] When the blackout curtain 7 is activated, the rotating shaft, driven by the drive mechanism, causes the curtain 71 to unfold downwards, thus forming a darkroom N enclosed on the limiting frame 5. The light source 31 on the base 3 is activated and shines light onto the workpiece 200, so that the projection of the workpiece 200 is projected onto the reflector 61 at the bottom of the top cover 6.

[0075] Then, the image acquisition device 51 on the limit frame 5 is activated to acquire the projected image of the workpiece 200 on the reflector 61 and upload it to the host computer for image comparison and analysis, thereby determining whether the workpiece 200 is qualified.

[0076] The blackout curtain 7 restarts, and the drive mechanism drives the rotating shaft to rotate in the opposite direction, causing the curtain 71 to retract and reset. The conveyor belt 4 restarts, sending the workpiece 200 from the second area M2 to the third area M3. The robot 2 then removes the inspected workpiece 200 from the third area M3 onto the second loading tray 12 or the third loading tray 13.

[0077] As can be seen, the light-blocking curtain 7 on the missing rivet detection device 100 can be unfolded only after the workpiece 200 has moved into place, so that a dark chamber N for detecting the workpiece 200 is formed on the conveyor belt 4; when the detection is completed, the light-blocking curtain 7 will automatically reset, so that the workpiece 200 can be easily moved out of the detection area so that the robot 2 can take away the workpiece 200.

[0078] In practical applications, to allow the curtain 71 to roll up on the shaft like a measuring tape, the curtain 71 is generally made of a thin fabric material. This can lead to the curtain 71 not being able to fully unfold during its operation due to a lack of counterweight; or, the rotational stroke of the shaft may restrict the curtain 71 from fully unfolding. These factors can all prevent the curtain 71 from fully unfolding, potentially resulting in light-leaking gaps at the bottom of the limiting frame 5 on both sides, affecting the airtightness of the darkroom N.

[0079] Therefore, in one embodiment of this application, please refer to Figure 7A light-blocking plate 73 is connected to the extended end of the curtain 71, and the light-blocking plate 73 can move with the curtain 71. In this way, by using the light-blocking plate 73 as a counterweight on the extended end of the curtain 71, the curtain 71 can be fully extended to stop against the base 3 and be properly enclosed, and the light leakage gaps that exist when the curtain 71 is not fully extended can be filled, effectively improving the airtightness of the darkroom N.

[0080] In addition, since the light-blocking plate 73 cannot be deformed, it can only be located outside the storage compartment 72 during the storage process of the curtain 71. This means that the light-blocking plate 73 cannot be kept vertical and is prone to tilting and spreading out into the space outside or inside the dark room. As a result, when the light-blocking plate 73 is moved downward again, it is easy to hit the limiting frame 5 and cannot avoid the limiting frame 5 until it moves to the bottom, which can easily lead to light leakage gaps.

[0081] Therefore, based on the above, in one embodiment of this application, please refer to Figure 7 The base 3 is also provided with enclosures 32 located on both sides of the conveyor belt 4. The enclosures 32 are provided with limiting grooves 321 that cooperate with the position of the limiting frame 5. Both ends of the light shield 73 extend to the enclosures 32 on both sides of the base 3 and are restricted within the limiting grooves 321.

[0082] In this way, the limiting groove 321 restricts the range of motion of the light-shielding plate 73, so that the light-shielding plate 73 remains vertical and avoids it from tilting and spreading outward or inward when the light-shielding curtain 7 is in the stored state. This effectively solves the problem that the light-shielding plate 73 cannot move to the end, which can easily lead to light leakage gaps.

[0083] Regarding the positioning structure for the workpiece 200 when it is moved to the detection area, please refer to one embodiment of this application. Figure 8 The base 3 is also provided with a movable stop 33 that can be driven to stand up or reset. The movable stop 33 is used to stop the workpiece 200 that is moved by the conveyor belt 4 into the range surrounded by the limit frame 5.

[0084] In this embodiment, the base 3 is provided with a pair of movable stops 33 that can be triggered synchronously, and the workpiece 200 is stopped at two points synchronously on the same side in the forward direction of the workpiece 200, so that the workpiece 200 is neatly stopped within the range of the limiting frame 5. For the driving method of the movable stops 33, it is preferable to provide a corresponding driving structure such as a drive motor on the base 3 to drive the movable stops 33 to stand upright on the surface of the base 3 to stop the workpiece 200; or, when the workpiece 200 is released, the movable stops 33 can be reset, thereby releasing the stop on the workpiece 200.

[0085] In this way, the movable stop 33 is used to stop the workpiece 200, allowing the workpiece 200 to move into place in the limit frame 5, ensuring that the workpiece 200 can stay within the range of the limit frame 5.

[0086] Furthermore, in order to improve the positioning effect of workpiece 200, please refer to one embodiment of this application as well. Figure 8 and Figure 9 The base 3 also has a pair of guide blocks 34 protruding towards the center of the limiting frame 5 on both sides. The opposite end faces of the pair of guide blocks 34 are guide surfaces 340 used to correct the movement path of the workpiece 200. Figure 9 As shown, the distance L between the guide surfaces 340 on the pair of guide blocks 34 gradually decreases towards the movable stop block 33.

[0087] In this way, the orientation of the workpiece 200 entering the limiting frame 5 is corrected by the guide blocks 34 on both sides, so that the workpiece 200 within the range of the limiting frame 5 is aligned with the frame opening of the limiting frame 5, which effectively improves the uniformity of the projected image of the workpiece 200 obtained, and is beneficial to image comparison and analysis processing.

[0088] In this embodiment, as Figure 8 and Figure 10 As shown, the base 3 has multiple adjustment holes 35 on both sides, and the guide block 34 has an elongated hole 341 corresponding to the position of the adjustment hole 35, so that the fasteners such as screws can be selectively fixed in the corresponding position of the adjustment hole 35 to adjust the distance between the pair of guide blocks 34, which is beneficial for adapting to guide workpieces 200 of different lengths, thereby improving adaptability.

[0089] In this embodiment, the guide block 34 can preferably be a symmetrical component, which is beneficial for uniform production and can be installed on both sides of the base 3 respectively.

[0090] For the structure on the limiting frame 5, please refer to one embodiment of this application. Figure 6 and Figure 11 The limiting frame 5 has a frame opening 50 for exposing the workpiece 200. The limiting frame 5 is provided with multiple image acquisition devices 51. The image acquisition devices 51 can preferably be cameras. The multiple image acquisition devices 51 are evenly distributed on the frame of the limiting frame 5 surrounding the frame opening 50.

[0091] In this way, multiple image acquisition devices 51 are used to take multi-angle pictures of the projection of the workpiece 200 presented on the reflector 61, effectively ensuring the integrity of the projection image of the workpiece 200 being inspected.

[0092] Preferably, such as Figure 11 As shown, the frame of the limiting frame 5 has an inclined surface 52 that is inclined toward the frame opening 50. This can be understood as the upper surface of the limiting frame 5 being inclined toward the frame opening 50. The aforementioned multiple image acquisition devices 51 are evenly distributed on the inclined surface 52 of the limiting frame 5.

[0093] In this way, the inclined surface 52 makes it easy for each image acquisition device 51 to be oriented in a concentrated manner. The inclination angle of the inclined surface 52 on the limiting frame 5 can be adjusted according to the concentration angle of each image acquisition device 51, thereby improving the orientation concentration of the image acquisition devices 51.

[0094] For the structure of the loading tray, please refer to one embodiment of this application. Figure 12 and Figure 13 The first loading tray 11, the second loading tray 12 and the third loading tray 13 have the same structure. Each loading tray includes a loading box 14. The loading box 14 is provided with a grid 141 for placing workpieces 200 respectively. Each grid 141 is configured to accommodate one workpiece 200 in a vertical position.

[0095] Workpieces 200 can be placed in each grid 141, which facilitates quick counting of the number of workpieces 200. For example, ... Figure 11 As shown, each loading box 14 preferably has 10 grid positions, so that a loading box 14 filled with workpieces 200 can quickly count 10 workpieces 200.

[0096] like Figure 12 As shown, the loading tray is also provided with multiple partition slots 15 for placing the loading boxes 14 respectively. The multiple partition slots 15 are arranged in an orderly manner on the loading tray along the length direction of the loading tray.

[0097] The dividing groove 15 is preferably a rectangular groove that matches the shape of the loading box 14, so that the loading box 14 can be automatically positioned after being placed in the dividing groove 15 of each loading tray.

[0098] Therefore, the structure on the first loading tray 11, the second loading tray 12 and the third loading tray 13 is conducive to the operator quickly counting the number of workpieces 200, thereby improving the work efficiency.

[0099] Preferably, please refer to Figure 12 The material tray is provided with multiple partition plates 16, and the partition groove 15 is formed between adjacent partition plates 16. Among them, there is a baffle 17 on one side of the material tray connecting the adjacent partition plates 16, and there is a slot 151 on the other side of the material tray between the adjacent partition plates 16, so that the loading box 14 can slide into the partition groove 15 from one side slot 151; or, when unloading materials, the loading box 14 can be removed from the slot 151 of the partition groove 15.

[0100] Therefore, in practical applications, as an example, when robot 2 is performing a part-removal operation on the last loading box 14 with a workpiece on the loading tray, it can quickly replace the empty loading box 14 using the slot 151 of the partition groove 15, so that robot 2 can continue to work.

[0101] Further improvements to the structure of the loading tray are described in one embodiment of this application; please refer to that embodiment as well. Figure 12 and Figure 13 The material box 14 is equipped with a sensor 142, which can preferably be a data chip with storage and memory functions.

[0102] The material tray is provided with a sensing part 18 located on the side wall of each partition groove 15. The sensing part 18 is used to cooperate with the sensing element 142 on the loading box 14 to identify the sensing element 142 and upload it to the host computer for further application.

[0103] Preferably, such as Figure 13 As shown, the sensors 142 on the loading box 14 are arranged diagonally on both sides of the loading box 14 and are set in conjunction with the rectangular dividing slots 15 on the loading tray, so that the loading box 14 can be placed in the dividing slots 15 of the loading tray without being affected by the direction, so that the chip and the sensing part 18 can be automatically aligned, thereby improving the positional adaptability of the sensors 142 on the loading box 14 and the sensing part 18 on the loading tray.

[0104] For the specific structure of robot 2, please refer to one embodiment of this application. Figure 2 and Figure 3 The robot 2 includes at least a first robotic arm 21 and a second robotic arm 22. The first robotic arm 21 can preferably be arranged between the missing rivet detection device 100 and the first material tray 11. The first robotic arm 21 is configured to transfer the workpiece 200 on the first material tray 11 to the conveyor belt 4 of the missing rivet detection device 100.

[0105] The second robotic arm 22 can preferably be positioned between the missing rivet detection device 100, the second material tray 12, and the third material tray 13. The second robotic arm 22 is configured to transfer the workpiece 200 removed from the dark chamber N to the second material tray 12 or the third material tray 13.

[0106] In this way, two robotic arms are used to feed and sort workpieces 200, which effectively improves the efficiency and accuracy of operation.

[0107] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A rivet leak detection apparatus, characterized by, The device includes a base and a conveyor belt, a limiting frame, and a top cover mounted on the base. The conveyor belt is used to move the workpiece within the surrounding area of ​​the limiting frame. The top cover is located above the limiting frame, and light-shielding curtains that can be unfolded or retracted are provided on both sides of the top cover. The top cover, the limiting frame, and the light-shielding curtains that unfold to both sides of the limiting frame together form a dark chamber that encloses the workpiece. The top cover is provided with a reflector, and the base is provided with a light source located below the area surrounded by the limiting frame. The light source illuminates the workpiece located within the limiting frame, so that the projection of the workpiece is projected onto the reflector. The limiting frame is provided with an image acquisition device, which is used to acquire the projected image on the reflector and upload it to the host computer.

2. The rivet miss detection apparatus of claim 1, wherein: The blackout curtain includes a curtain, a storage compartment, a pivot, and a drive mechanism for driving the pivot to rotate. The storage compartment is mounted on the base, and the curtain is wound around the pivot. The pivot is located inside the storage compartment and is driven by the drive mechanism to rotate in both directions, thereby causing the curtain to unfold or retract.

3. The rivet miss detection apparatus of claim 2, wherein: A light-blocking plate is connected to the extended end of the curtain, and the light-blocking plate can move with the curtain.

4. The rivet leakage detection device according to claim 1, characterized in that: The base is also provided with a movable stop block that can be driven to stand up or reset. The movable stop block is used to stop the workpiece that has been moved by the conveyor belt into the range surrounded by the limiting frame.

5. The rivet leakage detection device according to claim 4, characterized in that: The base is also provided with a pair of guide blocks on both sides protruding towards the center of the limiting frame. The opposite end faces of the pair of guide blocks are guide surfaces for correcting the movement path of the workpiece. The distance between the guide surfaces on the pair of guide blocks gradually decreases towards the movable stop.

6. The rivet leakage detection device according to any one of claims 1 to 5, characterized in that: The limiting frame has a frame opening for exposing the workpiece, and the limiting frame is provided with a plurality of image acquisition devices, which are evenly distributed on the limiting frame body surrounding the frame opening.

7. A detection and sorting system, characterized in that, The device includes a first loading tray, a second loading tray, and a third loading tray, a robot, and a missing rivet detection device as described in any one of claims 1 to 6: the first loading tray, the second loading tray, and the third loading tray are respectively used to place workpieces; the robot is configured to pick up workpieces from the first loading tray and place them on the missing rivet detection device for detection, and place qualified workpieces on the second loading tray, or place unqualified workpieces on the third loading tray.

8. The detection and sorting system according to claim 7, characterized in that: The first, second, and third loading trays each include a loading box, and the loading box is provided with a grid for placing workpieces respectively; the loading tray is also provided with a plurality of partition slots for placing the loading boxes respectively, and the plurality of partition slots are arranged in an orderly manner on the loading tray along the length direction of the loading tray.

9. The detection and sorting system according to claim 8, characterized in that: The loading box is provided with sensors on both sides at opposite corners, and the loading tray is provided with sensing parts located on the side walls of each of the partition slots. The sensing parts are used to cooperate with the sensors on the loading box.

10. The detection and sorting system according to claim 7, characterized in that: The robot includes a first robotic arm and a second robotic arm. The first robotic arm is configured to transfer workpieces from the first loading tray to the conveyor belt of the missing rivet detection device. The second robotic arm is configured to transfer workpieces removed from the darkroom to the second loading tray or the third loading tray.

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