Visual detection device and detection method for special-shaped injection molded part

Abstract

The invention relates to the technical field of machine vision detection, and provides a vision detection device and method for a special-shaped injection molding part, the vision detection device comprises a plurality of chain plates, a limiting cylinder, a lifting part, a first detection camera and a second detection camera, and the plurality of chain plates are hinged; the limiting cylinder is arranged on the chain plate, and the chain plate is provided with a through hole corresponding to the limiting cylinder; one end of the lifting piece is arranged in the limiting cylinder, and the other end of the lifting piece penetrates through the chain plate; the first detection camera corresponds to the opening of the limiting cylinder; the second detection camera is arranged on one side of the limiting cylinder. According to the detection device disclosed by the invention, the top surface of the special-shaped workpiece can be conveniently detected through the first detection camera, and the bottom surface of the special-shaped workpiece can be detected through the second detection camera, so that the detection comprehensiveness is effectively improved; meanwhile, the special-shaped workpiece can be driven to move through the chain plate, so that the detection efficiency is improved; due to the fact that the structure is integrally integrated and concise, the structure has the advantage of being low in application cost.

Description

Technical Field

[0001] This invention relates to the field of machine vision inspection technology, and in particular to a visual inspection device and method for irregularly shaped injection molded parts. Background Technology

[0002] Visual inspection technology is a core sensing technology in industrial automation. It uses machine vision systems to simulate the functions of the human eye for measurement, identification, guidance, and inspection. Currently, machine vision inspection is widely used in industrial production to replace manual inspection, thereby improving production efficiency.

[0003] An existing invention patent application with publication number CN118225786A discloses a visual inspection device suitable for the appearance inspection of irregularly shaped workpieces, belonging to the field of visual inspection technology. It includes a control terminal, a frame, and a detection mechanism, a fixing mechanism, and a rotating mechanism installed within the frame. The detection mechanism, fixing mechanism, and rotating mechanism are all communicatively connected to the control terminal. The fixing mechanism is installed at the rotating end of the rotating mechanism and is used to fix the product. The rotating mechanism is used to rotate the fixing mechanism, and the detection mechanism is used to continuously capture images of the product during the rotation process and upload the captured images to the control terminal.

[0004] As mentioned above, the technical solution uses a rotating device to drive the workpiece to rotate, which facilitates multi-faceted imaging of the workpiece. However, this inspection method is time-consuming, labor-intensive, and inefficient, and it cannot detect the bottom surface of the workpiece. Some vision inspection devices, although equipped with multiple cameras to inspect the top and bottom surfaces, do not perform well in inspecting irregularly shaped workpieces. Usually, it is necessary to manually straighten the irregularly shaped workpiece and then use pneumatic grippers or other equipment to hold the workpiece for inspection. Since the workpiece is involved in transportation, several degrees of freedom of pneumatic grippers need to work together, which leads to integration difficulties and numerous drive pipelines. If an automatic inspection is achieved by moving irregularly shaped workpieces with a robotic arm, the cost will be too high. In order to ensure that the posture of irregularly shaped workpieces is consistent during inspection, the robotic arm can usually only grasp one workpiece and place it at the inspection station, so the work efficiency still cannot be improved. Summary of the Invention

[0005] In view of this, the present invention proposes a visual inspection device and method for irregularly shaped injection molded parts that can detect the top and bottom surfaces of irregularly shaped workpieces, with low investment cost and high inspection efficiency, in order to solve the problems of limited detection direction, high cost and low inspection efficiency of existing visual inspection devices.

[0006] The technical solution of this invention is implemented as follows: On one hand, the present invention provides a visual inspection device for irregularly shaped injection molded parts, including a chain plate, a limiting cylinder, a lifting component, a first inspection camera, and a second inspection camera, wherein, There are multiple chain plates, and the multiple chain plates are hinged together; The limiting cylinder is set on the chain plate, and the chain plate is provided with a through hole corresponding to the limiting cylinder; One end of the lifting component is set inside the limiting cylinder, and the other end of the lifting component passes through the chain plate; The opening setting of the first detection camera corresponds to the limiting cylinder; The second detection camera is located on one side of the limiting cylinder.

[0007] Based on the above technical solutions, preferably, the limiting cylinder has a stepped cylindrical structure, and the lifting component includes a lifting platform, a pin, a connecting plate, a screw, and a spring, wherein... The lifting platform has a through hole, one end of which is located inside the limiting cylinder, and the lifting platform slides in conjunction with the chain plate. The ejector pin is mounted on the lifting platform; The connecting plate is located on the side of the lifting platform; The large-diameter end of the limiting cylinder is connected to the chain plate, and the screw passes through the stepped surface of the limiting cylinder and is connected to the connecting plate. The spring is fitted onto the screw.

[0008] Based on the above technical solutions, preferably, the system further includes a first driving component and a second driving component, and the lifting component further includes meshing teeth, wherein... The meshing teeth are located on the end of the lifting platform away from the ejector pin; The first driving component is a rotating wheel, and multiple toothed grooves are formed on the circumference of the rotating wheel, which mesh with the meshing teeth; The second drive component is used to drive the lifting platform to move.

[0009] Based on the above technical solutions, preferably, the second driving component includes a lever, a connecting shaft, a motor, and a bevel gear set, wherein... The side of the meshing teeth is set as an involute arc structure. The maximum thickness of the meshing teeth is less than the diameter of the lifting platform. There are two side-by-side dials. The distance between the two dials is greater than the maximum thickness of the meshing teeth and less than the diameter of the lifting platform. Two levers are connected in series by a connecting shaft, and the connecting shaft and the levers are fixed together. The levers have an arc-shaped structure. The motor is located on one side of the dial plate, and the main shaft of the motor is connected to the connecting shaft through a bevel gear set.

[0010] Based on the above technical solutions, preferably, a background component is also included, which comprises a background plate and a positioning ring, wherein... The lifting platform has several positioning holes on one end inside the limiting cylinder, and one end of the ejector pin is inserted into the positioning hole; The background plate corresponds to the pin opening, and the background plate is attached to one end of the lifting platform located inside the limiting cylinder; The positioning ring is located at the edge of the small diameter end of the limiting cylinder. The positioning ring is used for pre-positioning of irregular workpieces and is connected to the background plate.

[0011] Based on the above technical solutions, preferably, the background assembly further includes a guide cylinder and a guide rod, and the positioning ring includes a ring plate, a top plate, and a positioning block, wherein... The ring plate is designed to fit the circumferential surface of the small-diameter end of the limiting cylinder; The top plate is fitted to the top of the small diameter end of the limiting cylinder, and the top plate is connected to the ring plate; The positioning block, ring plate, and top plate are designed as an integrated structure. The guide tube is connected to the inner edge of the top plate; The guide rod is set on the background plate and is inserted into the guide cylinder.

[0012] Based on the above technical solutions, preferably, it also includes a light source assembly and a frame. The light source assembly includes a carrier, an upper light source, a lower light source, a side light source, and a lifting rod. The carrier is mounted on the frame; The upper light source is connected to the carrier frame; The lower light source is positioned opposite to the upper light source, and the lower light source surrounds the limiting cylinder; The side light source is mounted on the frame; The lifting rod is mounted on the carrier, and the movable end of the lifting rod is connected to the lower light source; The first detection camera is mounted on the carrier, and the second detection camera is mounted on the frame.

[0013] Based on the above technical solutions, preferably, the chain plate includes a bottom plate, side plates, a connecting frame, and a pin, wherein, A limit cylinder is installed on the base plate, and the lifting component penetrates the base plate; The side panels are set on both sides of the base plate, and the side panels are set at an angle to the base plate; The connecting frame is connected to the side plate; The pin is connected to the connecting bracket.

[0014] On the other hand, the present invention provides a method for detecting irregularly shaped parts, which uses the above-mentioned visual inspection device for irregularly shaped injection molded parts and includes the following steps: S1. Place the irregularly shaped workpiece inside the limiting cylinder so that the lifting component can support the irregularly shaped workpiece; S2. Feed chain plate, so that the irregular workpiece is moved to the position corresponding to the first detection camera and the second detection camera; S3. Lift the irregularly shaped workpiece using the lifting component so that the bottom of the irregularly shaped workpiece moves out of the limiting cylinder; S4. Take photos of the top surface of the irregular workpiece using the first inspection camera, and take photos of the side and bottom surfaces of the irregular workpiece using the second inspection camera. S5. After the photo inspection is completed, the lifting component is reset, the irregular workpiece falls into the limiting cylinder, and continues to be fed into the next process with the chain plate.

[0015] Furthermore, this invention provides another method for inspecting irregularly shaped parts, which utilizes the aforementioned visual inspection device for irregularly shaped injection molded parts and includes the following steps: P1. Place the irregularly shaped workpiece inside the limiting cylinder so that the lifting component can support the irregularly shaped workpiece; P2, feed chain plate, to move the irregular workpiece to the position corresponding to the first detection camera and the second detection camera; P3. The motor drives the bevel gear set and connecting shaft to rotate, and then the two dial plates engage the meshing teeth to eliminate the chain plate gap error. Then, as the dial plates continue to rotate, they push the lifting platform and the ejector pin to lift the irregular workpiece so that the bottom of the irregular workpiece moves out of the limiting cylinder. P4. Take photos of the top surface of the irregular workpiece using the first inspection camera, and take photos of the side and bottom surfaces of the irregular workpiece using the second inspection camera. P5. After the photo inspection is completed, the lifting component is reset, the irregular workpiece falls into the limiting cylinder, and continues to be fed into the next process with the chain plate.

[0016] The visual inspection device and method for irregularly shaped injection molded parts of the present invention have the following advantages over the prior art: (1) By setting a limiting cylinder on the chain plate, the irregular workpiece can be pre-positioned by the limiting cylinder, and the irregular workpiece inside the limiting cylinder can be lifted by the lifting component. This makes it convenient for the first inspection camera to inspect the top surface of the irregular workpiece, and the second inspection camera to inspect the bottom surface of the irregular workpiece, which effectively improves the comprehensiveness of the inspection. At the same time, the irregular workpiece can be moved by the chain plate, which is conducive to improving the inspection efficiency. This structure is simple in overall integration, so it also has the advantage of low application cost. (2) The lifting component inside the limiting cylinder is equipped with a lifting platform and ejector pins. By changing the number, length and arrangement of ejector pins on the lifting platform, it can adapt to support different shaped workpieces and play a good lifting function, with good versatility. At the same time, a screw and spring are also provided inside the limiting cylinder, which realizes the movement guidance and self-resetting of the lifting component. (3) The drive component structure is equipped with two push plates. The first drive component is equipped with a tooth groove, and the lifting component is equipped with a meshing tooth. In this way, the chain plate can be moved by the tooth groove of the first drive component and the meshing tooth to realize the conveying work. The push plate can also engage the meshing tooth to eliminate the gap of the chain plate and ensure accurate positioning of irregular workpieces. At the same time, the push plate can also lift the lifting platform. This realizes the integration of functional structure and further reduces the application cost and assembly convenience. (4) By setting the background component, it provides a background reference for the irregular workpiece. The background plate in the background component can block the extra positioning holes on the lifting platform, which is conducive to improving the detection accuracy. At the same time, the background component is connected by the positioning ring and the edge of the limiting cylinder, which has the advantage of convenient assembly. In addition, a positioning block is set in the background component, which can pre-position the irregular workpiece locally to ensure the convenience of placing the irregular workpiece. (5) The light source assembly structure is connected to the frame through the carrier and is equipped with an upper light source, a lower light source and a side light source. This can provide supplementary lighting for the top, bottom and sides of the irregular workpiece, which is beneficial to ensure the detection accuracy. At the same time, the lower light source is connected to the carrier through the lifting rod. This can provide supplementary lighting for the bottom of the irregular workpiece while moving the limit cylinder to avoid interference with the feed of the chain plate, which effectively improves the convenience of application. (6) In the chain plate structure, the bottom plate and the side plate are set as an angled structure, which can avoid interfering with the installation of the second detection camera, thus facilitating the bottom surface detection of irregular workpieces. At the same time, a connecting frame and a pin are set on the side of the side plate, which facilitates the assembly of more detection auxiliary parts through the pin. The chain hinge pin can also be set to achieve redundant drive and ensure the reliability of the work. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a perspective view of the visual inspection device for irregularly shaped injection molded parts according to the present invention; Figure 2 For the present invention Figure 1 Enlarged view of the structure at point A in the middle; Figure 3 For the present invention Figure 1 Enlarged view of the structure at point B; Figure 4 This is a front view of the visual inspection device for irregularly shaped injection molded parts according to the present invention; Figure 5 This is a side view of the visual inspection device for irregularly shaped injection molded parts according to the present invention; Figure 6 This is a structural diagram showing the layout of the first and second inspection cameras in the visual inspection device for irregularly shaped injection molded parts according to the present invention. Figure 7 This is a three-dimensional view of the disassembled structure of the chain plate, limiting cylinder and background component of the visual inspection device for irregularly shaped injection molded parts of the present invention. Figure 8 This is a perspective view of the background components of the visual inspection device for irregularly shaped injection molded parts according to the present invention; Figure 9 This is a perspective view of the chain plate of the visual inspection device for irregularly shaped injection molded parts according to the present invention; Figure 10 This is a side view of the chain plate, limiting cylinder, and second drive component of the visual inspection device for irregularly shaped injection molded parts of the present invention. Figure 11 For the present invention Figure 10 Sectional view along the AA direction; Figure 12 For the present invention Figure 11 Enlarged view of the structure at point C; Figure 13 An exploded view of the lifting component of the visual inspection device for irregularly shaped injection molded parts according to the present invention; In the diagram: 1. Chain plate; 11. Base plate; 12. Side plate; 13. Connecting frame; 14. Pin; 101. Through hole; 2. Limiting cylinder; 3. Lifting component; 31. Lifting platform; 32. Ejector pin; 33. Connecting plate; 34. Screw; 35. Spring; 36. Meshing teeth; 301. Positioning hole; 4. First detection camera; 5. Second detection camera; 6. First driving component; 601. Tooth groove; 7. Second driving component; 71. Paddle plate; 72. Connecting shaft; 73. Motor; 74. Bevel gear set; 8. Background assembly; 81. Background plate; 82. Positioning ring; 821. Ring plate; 822. Top plate; 823. Positioning block; 83. Guide cylinder; 84. Guide rod; 9. Light source assembly; 91. Carrier frame; 92. Upper light source; 93. Lower light source; 94. Side light source; 95. Lifting rod; 10. Frame. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0020] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0021] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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 the embodiments of the present invention 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 the embodiments of the present invention.

[0022] 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 invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0025] like Figures 1-13 As shown, the visual inspection device for irregularly shaped injection molded parts of the present invention includes a chain plate 1, a limiting cylinder 2, a lifting component 3, a first inspection camera 4, a second inspection camera 5, a first driving component 6, a second driving component 7, a background component 8, a light source component 9, and a frame 10.

[0026] like Figure 1 , Figure 2 , Figure 7 , Figure 9 , Figure 11 and Figure 12As shown, multiple chain plates 1 are provided, and the multiple chain plates 1 are hinged together; a limiting cylinder 2 is provided on the chain plate 1, and the chain plate 1 is provided with a through hole 101 corresponding to the limiting cylinder 2; one end of the lifting member 3 is provided in the limiting cylinder 2, and the other end of the lifting member 3 passes through the chain plate 1; the first detection camera 4 is provided corresponding to the opening of the limiting cylinder 2; the second detection camera 5 is provided on one side of the limiting cylinder 2. As described above, chain plate 1 is a moving carrier, and multiple chain plates 1 are provided and hinged to each other to form a conveyor chain structure. The limiting cylinder 2 is set on the chain plate 1, and the chain plate 1 is provided with a through hole 101 corresponding to the limiting cylinder 2, thereby forming a through structure from the chain plate 1 to the limiting cylinder 2. Among them, the lifting component 3 passes through the chain plate 1 to form an up-and-down sliding structure. One end of the lifting component 3 is located inside the limiting cylinder 2. In this way, when placing irregular workpieces, the irregular workpieces can be positioned by the limiting cylinder 2 and supported by the lifting component 3. When inspection is required, the top surface of the irregular workpiece is inspected by the first inspection camera 4, and then the irregular workpiece is pushed out of the limiting cylinder 2 by the lifting component 3 to expose the bottom of the irregular workpiece. Then the bottom surface of the irregular workpiece is inspected by the second inspection camera 5. In some embodiments, the irregular workpiece can be first ejected from the limiting cylinder 2 by the lifting member 3, and then the top and bottom surfaces of the irregular workpiece can be detected simultaneously by the first detection camera 4 and the second detection camera 5. Specifically, the internal structure of the limiting cylinder 2 is not limited, and it is set according to the positioning requirements of the irregular workpiece. This solution can detect the top and bottom surfaces of irregularly shaped workpieces, ensuring comprehensiveness of the detection. At the same time, the device has a simple overall structure and low application cost. Furthermore, since the chain plate 1 can drive the irregularly shaped workpieces for feeding, the detection efficiency can be ensured.

[0027] like Figures 11-13 As shown, the limiting cylinder 2 has a stepped cylindrical structure. The lifting component 3 includes a lifting platform 31, a pin 32, a connecting plate 33, a screw 34, and a spring 35. The lifting platform 31 passes through the through hole 101, and one end of the lifting platform 31 is located inside the limiting cylinder 2. The lifting platform 31 is slidably engaged with the chain plate 1. The pin 32 is disposed on the lifting platform 31. The connecting plate 33 is disposed on the side of the lifting platform 31. The large-diameter end of the limiting cylinder 2 is connected to the chain plate 1. The screw 34 passes through the stepped surface of the limiting cylinder 2 and is connected to the connecting plate 33. The spring 35 is sleeved on the screw 34. As described above, in the structure of the lifting component 3, the lifting platform 31 passes through the chain plate 1 to form a sliding fit, and a connecting plate 33 is provided on the side of the lifting platform 31. The limiting cylinder 2 is set as a stepped cylindrical structure, and the limiting cylinder 2 is connected to the chain plate 1 with its large diameter end. In this way, a screw 34 can be set at the stepped surface of the limiting cylinder 2 to connect to the connecting plate 33 on the side of the lifting platform 31. At the same time, a spring 35 is sleeved on the screw 34. In this way, after the lifting platform 31 is lifted and the detection is completed, the spring 35 can hold the connecting plate 33 to realize the self-resetting of the lifting platform 31, which improves the convenience of application. Among them, the lifting component 3 uses the ejector pins 32 on the top surface of the lifting platform 31 to support the irregular workpiece. By changing the arrangement position, length and number of ejector pins 32, it is possible to support irregular workpieces with different shapes, which effectively improves versatility. At the same time, the ejector pins 32 support the irregular workpiece, which minimizes the obstruction of the bottom surface of the irregular workpiece and helps to ensure the inspection quality. The layout of the ejector pins 32 can be adapted to avoid obstructing the bottom surface of the parts that need to be inspected.

[0028] like Figure 1 , Figure 4 , Figure 5 and Figure 13 As shown, the lifting component 3 also includes a meshing tooth 36, wherein the meshing tooth 36 is provided on the end of the lifting platform 31 away from the ejector pin 32; the first driving component 6 is a rotating wheel, and a plurality of tooth grooves 601 are provided on the circumferential surface of the rotating wheel, and the tooth grooves 601 mesh with the meshing tooth 36; the second driving component 7 is used to drive the lifting platform 31 to move. As described above, the lifting platform 31 of the lifting component 3 is provided with meshing teeth 36 on its bottom surface, and the first driving component 6 is set as a rotating wheel with a toothed groove 601. In this way, after the first driving component 6 is connected to the main shaft of the drive motor and the meshing teeth 36 are engaged into the toothed groove 601, as the motor drives the first driving component 6 to rotate, the chain plate 1 can be moved by relying on the cooperation with the meshing teeth 36. Thus, the lifting component 3 is not only used for lifting irregularly shaped workpieces, but also realizes the feeding of the chain plate 1, which realizes multi-functional integration. Specifically, Figure 1 The structure shown is a partial arrangement of chain plates 1. In actual applications, several chain plates 1 form a ring structure and surround two first driving members 6 to form a conveyor chain structure, thereby achieving continuous feeding. Specifically, to avoid structural interference, when inspecting irregularly shaped workpieces through the first inspection camera 4 and the second inspection camera 5, the chain plate 1 pauses its feed until the inspection is completed, after which the chain plate 1 resumes its feed and switches to the next chain plate 1.

[0029] like Figure 3 , Figure 4 and Figure 13As shown, the second driving component 7 includes a dial plate 71, a connecting shaft 72, a motor 73, and a bevel gear set 74. The side of the meshing teeth 36 is configured as an involute arc structure, and the maximum thickness of the meshing teeth 36 is less than the diameter of the lifting platform 31. Two dial plates 71 are arranged side by side, and the distance between the two dial plates 71 is greater than the maximum thickness of the meshing teeth 36 but less than the diameter of the lifting platform 31. The connecting shaft 72 connects the two dial plates 71 in series and is fixed to the dial plates 71. The dial plates 71 have an arc-shaped structure. The motor 73 is located on one side of the dial plate 71, and the main shaft of the motor 73 is connected to the connecting shaft 72 through the bevel gear set 74. As described above, the second drive unit 7 is used to provide lifting power for the lifting unit 3. In the structure of the second drive unit 7, a motor 73 is provided. The motor 73 is fixed to the frame. When the motor 73 drives the bevel gear set 74 to rotate, the connecting shaft 72 will drive the two levers 71 to swing. Then, by relying on the levers 71 to push the lifting unit 3, the lifting unit 3 can be lifted. Among them, the lever 71 contacts the lifting platform 31 of the lifting component 3. For this driving structure, the side of the meshing tooth 36 is set as an involute arc structure. The maximum thickness of the meshing tooth 36 is less than the diameter of the lifting platform 31. Thus, the two sides of the meshing tooth 36 are left empty so that the two levers 71 can contact the lifting platform 31. Specifically, the distance between the two levers 71 is greater than the maximum thickness of the meshing teeth 36 and less than the diameter of the lifting platform 31. In this way, the meshing teeth 36 can be engaged between the two levers 71 and contact the bottom surface of the lifting platform 31 corresponding to the gaps on both sides of the meshing teeth 36. At the same time, if a positional error is caused by the fit gap between the chain plates 1, the position of the chain plates 1 can be corrected by moving the levers 71 along the meshing teeth 36 of the involute arc structure, thereby improving the detection accuracy.

[0030] like Figure 8 and Figure 12 As shown, the background assembly 8 includes a background plate 81 and a positioning ring 82. The lifting platform 31 has several positioning holes 301 on one end inside the limiting cylinder 2, and one end of the ejector pin 32 is inserted into the positioning hole 301. The background plate 81 has openings corresponding to the ejector pin 32, and the background plate 81 is attached to the end of the lifting platform 31 inside the limiting cylinder 2. The positioning ring 82 is set at the edge of the small diameter end of the limiting cylinder 2. The positioning ring 82 is used for pre-positioning of irregular workpieces, and the positioning ring 82 is connected to the background plate 81. As described above, the lifting platform 31 has several positioning holes 301 on one end inside the limiting cylinder 2. These holes are used to arrange ejector pins 32 according to the positioning requirements of the irregular workpiece, so as to facilitate the support of irregular workpieces of different shapes and realize the support of irregular workpieces. Specifically, the positioning holes 301 are provided with threads to screw the ejector pins 32 for installation. In the structure of the background component 8, a positioning ring 82 is provided to connect to the small diameter end of the limiting cylinder 2, and the positioning ring 82 is connected to the background plate 81. After the positioning ring 82 is installed, the background plate 81 is located inside the limiting cylinder 2 and abuts against the side of the lifting platform 31 with the positioning hole 301. The background plate 81 only corresponds to the hole of the ejector pin 32 so that the ejector pin 32 can pass through. The positioning hole 301 on the lifting platform 31 where the ejector pin 32 is not installed is blocked by the background plate 81. In this way, a good visible background can be provided for irregular workpieces to improve the detection accuracy. Furthermore, the positioning ring 82 is not only used for the installation of the background plate 81, but also for the pre-positioning of irregular workpieces, so as to further improve the convenience of placing irregular workpieces into the limiting cylinder 2.

[0031] like Figure 8 As shown, the background assembly 8 also includes a guide cylinder 83 and a guide rod 84. The positioning ring 82 includes a ring plate 821, a top plate 822, and a positioning block 823. The ring plate 821 is fitted to the circumferential surface of the small-diameter end of the limiting cylinder 2; the top plate 822 is fitted to the top of the small-diameter end of the limiting cylinder 2 and is connected to the ring plate 821; the positioning block 823 is integrated with the ring plate 821 and the top plate 822; the guide cylinder 83 is connected to the inner edge of the top plate 822; the guide rod 84 is mounted on the background plate 81 and is inserted into the guide cylinder 83. As described above, in the background component 8, to prevent the positioning ring 82 from interfering with the installation of irregularly shaped workpieces, the positioning ring 82 is engaged with the small-diameter end of the limiting cylinder 2 by means of the ring plate 821 and the top plate 822. In this way, the inner ring surface of the top plate 822 is flush with the inner ring surface of the small-diameter end of the limiting cylinder 2, thereby preventing interference with the picking and placing of workpieces; the positioning block 823 is set as an integral structure with the ring plate 821 and the top plate 822 for use in positioning workpieces; Specifically, the positioning block 823 has a positioning slot for accommodating irregularly shaped workpieces; Furthermore, a guide rod 84 is provided on the background plate 81, and a guide cylinder 83 is provided on the positioning ring 82. In this way, when the lifting platform 31 rises, the guide rod 84 can slide along the guide cylinder 83, and the background plate 81 rises synchronously. This can prevent the positioning ring 82 from falling off, thereby ensuring the normal operation of the testing work.

[0032] like Figure 2 As shown, the light source assembly 9 includes a carrier 91, an upper light source 92, a lower light source 93, a side light source 94, and a lifting rod 95. The carrier 91 is mounted on the frame 10; the upper light source 92 is connected to the carrier 91; the lower light source 93 is positioned opposite to the upper light source 92 and surrounds the limiting cylinder 2; the side light source 94 is mounted on the frame 10; the lifting rod 95 is mounted on the carrier 91, and the movable end of the lifting rod 95 is connected to the lower light source 93; a first detection camera 4 is mounted on the carrier 91, and a second detection camera 5 is mounted on the frame 10. As described above, the frame 10 is used as the main body of the production equipment, the light source assembly 9 is set on the frame 10 for supplementary lighting, and the second detection camera 5, the first driving component 6 and the second driving component 7 are all mounted on the frame 10. In the structure of the light source assembly 9, the carrier 91 is used to connect the frame 10. The first inspection camera 4 is mounted on the carrier 91 to facilitate the inspection of the top surface of the irregular workpiece. The second inspection camera 5 is mounted at an angle on the frame 10 to facilitate the inspection of the side and bottom surfaces of the irregular workpiece. The upper light source 92 is mounted on the carrier 91 to facilitate supplementary lighting on the top surface of the irregular workpiece. The lower light source 93 is connected to the carrier 91 via a lifting rod 95 to facilitate supplementary lighting on the bottom surface of the irregular workpiece. The side light source 94 is mounted on the frame 10 for supplementary lighting on the side surfaces of the irregular workpiece. Specifically, the lower light source 93 is set in a ring shape, so that when the lower light source 93 falls, it can surround the limiting cylinder 2 to ensure good supplementary lighting effect; this structure, through the setting of the lifting rod 95, can realize the lifting operation of the lower light source 93 to avoid interfering with the limiting cylinder 2 and affecting the normal feeding of the chain plate 1; Specifically, the upper light source 92 and the lower light source 93 are set as ring lights, and the side light source 94 is set as a strip light. This is conducive to realizing multi-faceted detection of workpiece edge contours, concavity and convexity, missing parts, scratches, cracks and engraved textures, thereby ensuring the detection effect.

[0033] like Figure 6 , Figures 9-11 As shown, the chain plate 1 includes a base plate 11, side plates 12, a connecting frame 13, and a pin 14. The base plate 11 is provided with a limit cylinder 2, and the lifting component 3 passes through the base plate 11. The side plates 12 are provided on both sides of the base plate 11, and the side plates 12 are set at an angle to the base plate 11. The connecting frame 13 is connected to the side plates 12. The pin 14 is connected to the connecting frame 13. As described above, the chain plate 1 is a single moving unit, with the base plate 11 as the main carrier, the limiting cylinder 2 and the lifting component 3 set on the base plate 11, and the side of the base plate 11 is provided with a shaft cylinder so as to be hinged to the base plate 11 of the adjacent chain plate 1 through a pin. The side plates 12 are located on both sides of the base plate 11 where no shaft cylinder is provided, and the side plates 12 are inclined to form an angle with the base plate 11, thereby avoiding interference with the installation of the second detection camera 5. The connecting frame 13 is installed on the side plate 12 by fasteners. The connecting frame 13 is also provided with a pin 14, which facilitates the assembly of more detection auxiliary parts through the pin 14. A chain hinge pin can also be set. The chain is set in a ring structure with several chain plates 1, and a sprocket is set to cooperate with the chain to achieve redundant drive and ensure the reliability of the operation.

[0034] The present invention provides a method for detecting irregularly shaped parts, using a visual inspection device for irregularly shaped injection molded parts, comprising the following steps: S1. Place the irregular workpiece inside the limiting cylinder 2 so that the lifting component 3 can support the irregular workpiece. S2, feed chain plate 1, so that the irregular workpiece is moved to the position corresponding to the first detection camera 4 and the second detection camera 5; S3. The irregular workpiece is lifted by the lifting component 3 so that the bottom of the irregular workpiece is moved out of the limiting cylinder 2; S4. Take a picture of the top surface of the irregular workpiece using the first detection camera 4, and take pictures of the side and bottom surfaces of the irregular workpiece using the second detection camera 5. S5. After the photo inspection is completed, the lifting component 3 is reset, the irregular workpiece falls into the limiting cylinder 2, and continues to be fed into the next process with the chain plate 1.

[0035] Another method for inspecting irregularly shaped parts according to the present invention, using the above-mentioned visual inspection device for irregularly shaped injection molded parts, includes the following steps: P1. Place the irregular workpiece inside the limiting cylinder 2 so that the lifting component 3 can support the irregular workpiece. P2, feed chain plate 1, to move the irregular workpiece to the position corresponding to the first detection camera 4 and the second detection camera 5; P3. The motor 73 drives the bevel gear set 74 and the connecting shaft 72 to rotate, and then the two levers 71 engage the meshing teeth 36 to eliminate the chain plate gap error. Then, as the levers 71 continue to rotate, they push the lifting platform 31 and the ejector pin 32 to lift the irregular workpiece so that the bottom of the irregular workpiece moves out of the limiting cylinder 2. P4. Take pictures of the top surface of the irregular workpiece using the first detection camera 4, and take pictures of the side and bottom surfaces of the irregular workpiece using the second detection camera 5. P5. After the photo inspection is completed, the lifting component 3 is reset, the irregular workpiece falls into the limiting cylinder 2, and continues to be fed into the next process with the chain plate 1.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A visual inspection device for irregularly shaped injection molded parts, characterized in that: Includes chain plate (1), limit cylinder (2), lifting component (3), first detection camera (4), and second detection camera (5), wherein, Multiple chain plates (1) are provided, and the multiple chain plates (1) are hinged together; The limiting cylinder (2) is disposed on the chain plate (1), and the chain plate (1) is provided with a through hole (101) corresponding to the limiting cylinder (2). One end of the lifting component (3) is disposed inside the limiting cylinder (2), and the other end of the lifting component (3) passes through the chain plate (1). The first detection camera (4) is set to correspond to the opening of the limiting cylinder (2); The second detection camera (5) is located on one side of the limiting cylinder (2).

2. The visual inspection device for irregularly shaped injection molded parts as described in claim 1, characterized in that: The limiting cylinder (2) has a stepped cylindrical structure, and the lifting component (3) includes a lifting platform (31), a pin (32), a connecting plate (33), a screw (34), and a spring (35). The lifting platform (31) passes through the through hole (101), one end of the lifting platform (31) is located inside the limiting cylinder (2), and the lifting platform (31) slides with the chain plate (1); The ejector pin (32) is mounted on the lifting platform (31); The connecting plate (33) is disposed on the side of the lifting platform (31); The large-diameter end of the limiting cylinder (2) is connected to the chain plate (1), and the screw (34) passes through the stepped surface of the limiting cylinder (2) and is connected to the connecting plate (33). The spring (35) is sleeved on the screw (34).

3. The visual inspection device for irregularly shaped injection molded parts as described in claim 2, characterized in that: It also includes a first drive member (6) and a second drive member (7), and the lifting member (3) further includes meshing teeth (36), wherein, The meshing teeth (36) are located on the end of the lifting platform (31) away from the ejector pin (32); The first driving component (6) is a rotating wheel, and a plurality of toothed grooves (601) are provided on the circumferential surface of the rotating wheel. The toothed grooves (601) mesh with the meshing teeth (36). The second drive unit (7) is used to drive the lifting platform (31) to move.

4. The visual inspection device for irregularly shaped injection molded parts as described in claim 3, characterized in that: The second driving component (7) includes a lever (71), a connecting shaft (72), a motor (73), and a bevel gear set (74), wherein, The side of the meshing tooth (36) is configured as an involute arc structure. The maximum thickness of the meshing tooth (36) is less than the diameter of the lifting platform (31). Two levers (71) are arranged side by side. The distance between the two levers (71) is greater than the maximum thickness of the meshing tooth (36) and less than the diameter of the lifting platform (31). The connecting shaft (72) connects two dial plates (71) in series, and the connecting shaft (72) is fixed to the dial plate (71). The dial plate (71) has an arc-shaped structure. The motor (73) is located on one side of the dial plate (71), and the main shaft of the motor (73) is connected to the connecting shaft (72) through the bevel gear set (74).

5. The visual inspection device for irregularly shaped injection molded parts as described in any one of claims 2 to 4, characterized in that: It also includes a background component (8), which includes a background plate (81) and a positioning ring (82), wherein, The lifting platform (31) has several positioning holes (301) on one end inside the limiting cylinder (2), and one end of the ejector pin (32) is inserted into the positioning hole (301); The background plate (81) has an opening corresponding to the pin (32), and the background plate (81) is attached to one end of the lifting platform (31) located inside the limiting cylinder (2); The positioning ring (82) is located at the edge of the small diameter end of the limiting cylinder (2). The positioning ring (82) is used for pre-positioning of irregular workpieces, and the positioning ring (82) is connected to the background plate (81).

6. The visual inspection device for irregularly shaped injection molded parts as described in claim 5, characterized in that: The background component (8) further includes a guide tube (83) and a guide rod (84), and the positioning ring (82) includes a ring plate (821), a top plate (822), and a positioning block (823), wherein, The ring plate (821) is set to fit the circumferential surface of the small diameter end of the limiting cylinder (2); The top plate (822) is fitted to the top of the small diameter end of the limiting cylinder (2), and the top plate (822) is connected to the ring plate (821); The positioning block (823), the ring plate (821), and the top plate (822) are configured as an integral structure; The guide tube (83) is connected to the inner edge of the top plate (822); The guide rod (84) is disposed on the background plate (81), and the guide rod (84) is inserted into the guide cylinder (83).

7. The visual inspection device for irregularly shaped injection molded parts as described in any one of claims 1 to 4, characterized in that: It also includes a light source assembly (9) and a frame (10), wherein the light source assembly (9) includes a carrier (91), an upper light source (92), a lower light source (93), a side light source (94), and a lifting rod (95), wherein, The carrier (91) is mounted on the frame (10); The upper light source (92) is connected to the carrier (91); The lower light source (93) is positioned opposite to the upper light source (92), and the lower light source (93) surrounds the limiting cylinder (2). The side light source (94) is mounted on the frame (10); The lifting rod (95) is mounted on the carrier (91), and the movable end of the lifting rod (95) is connected to the lower light source (93); The first detection camera (4) is mounted on the carrier (91), and the second detection camera (5) is mounted on the frame (10).

8. The visual inspection device for irregularly shaped injection molded parts as described in any one of claims 1 to 4, characterized in that: The chain plate (1) includes a base plate (11), side plates (12), a connecting frame (13), and a pin (14), wherein, The limiting cylinder (2) is provided on the base plate (11), and the lifting component (3) penetrates the base plate (11). The side plates (12) are disposed on both sides of the bottom plate (11), and the side plates (12) and the bottom plate (11) are disposed at an angle. The connecting frame (13) is connected to the side plate (12); The pin (14) is connected to the connecting frame (13).

9. A method for inspecting irregularly shaped parts, using the visual inspection device for irregularly shaped injection molded parts as described in any one of claims 1 to 8, characterized in that, Includes the following steps: S1. Place the irregular workpiece inside the limiting cylinder (2) so that the lifting component (3) supports the irregular workpiece; S2. Feed the chain plate (1) to move the irregular workpiece to the position corresponding to the first detection camera (4) and the second detection camera (5); S3. The irregular workpiece is lifted by the lifting component (3) so that the bottom of the irregular workpiece is moved out of the limiting cylinder (2); S4. Take a picture of the top surface of the irregular workpiece using the first detection camera (4), and take a picture of the side and bottom surfaces of the irregular workpiece using the second detection camera (5). S5. After the photo inspection is completed, the lifting component (3) is reset, the irregular workpiece falls into the limiting cylinder (2), and continues to be fed into the next process along with the chain plate (1).

10. A method for inspecting irregularly shaped parts, using the visual inspection device for irregularly shaped injection molded parts as described in claim 4, characterized in that, Includes the following steps: P1. Place the irregular workpiece inside the limiting cylinder (2) so that the lifting component (3) supports the irregular workpiece. P2. Feed the chain plate (1) to move the irregular workpiece to the position corresponding to the first detection camera (4) and the second detection camera (5); P3. The motor (73) drives the bevel gear set (74) and the connecting shaft (72) to rotate, and then the two dial plates (71) engage the meshing teeth (36) to eliminate the chain plate gap error. Then, as the dial plates (71) continue to rotate, they push the lifting platform (31) and the ejector pin (32) to lift the irregular workpiece so that the bottom of the irregular workpiece moves out of the limiting cylinder (2). P4. Take a picture of the top surface of the irregular workpiece using the first detection camera (4), and take a picture of the side and bottom surfaces of the irregular workpiece using the second detection camera (5). P5. After the photo inspection is completed, the lifting component (3) is reset, the irregular workpiece falls into the limiting cylinder (2), and continues to be fed into the next process along with the chain plate (1).

Images