A six-station rotary table type multi-defect workpiece detection device

Abstract

This application discloses a six-station rotary multi-defect workpiece inspection device, relating to the field of workpiece defect inspection technology. It includes a rotary table, a feeding mechanism, a column inspection mechanism, a horizontal hole inspection mechanism, and a vertical hole inspection mechanism, which are arranged sequentially around the axis of the rotary table. The column inspection mechanism is used to detect whether the column is broken; the horizontal hole inspection mechanism is used to detect whether the horizontal side holes are through holes and whether there are burrs; the vertical hole inspection mechanism is used to detect whether the vertical circular holes are through holes and whether there are burrs; the feeding mechanism is used to pick up the inspected workpiece and place it on the feeding station. This application adopts a rotary table structure, which can simultaneously inspect multiple workpieces, shortening the inspection cycle. The rotary table rotation and inspection actions are parallel, with no idle waiting time, significantly improving inspection efficiency.

Description

Technical Field

[0001] This application relates to the field of workpiece defect detection technology, specifically a six-station rotary multi-defect workpiece detection device. Background Technology

[0002] In the field of precision manufacturing, workpiece quality inspection is a crucial link in ensuring product qualification rate and production efficiency. With the rapid development of Industry 4.0 and intelligent manufacturing, traditional manual visual inspection methods, due to their low efficiency, strong subjectivity, and susceptibility to missed inspections, can no longer meet the requirements of modern production lines for inspection efficiency, accuracy, and consistency. Especially in industries such as 3C electronics, automotive parts, and precision hardware, workpieces often have complex structural features, including multiple horizontal side holes, vertical round holes, column protrusions, and connecting plates. These features are prone to defects such as side hole blockage, column breakage, connection breakage, and hole burrs during production, which seriously affect the assembly performance and service life of the product.

[0003] Currently, machine vision inspection technology has become the mainstream technology for industrial defect detection due to its advantages such as non-contact operation, high speed, high precision, and good repeatability. However, in existing machine vision inspection equipment, single-station inspection equipment uses a single camera to inspect each workpiece one by one, resulting in low equipment utilization, long inspection cycles, and an inability to meet the needs of mass production. While linear multi-station inspection equipment achieves partial parallel operation by arranging multiple inspection stations on a linear conveyor belt, it occupies a large area and requires complex synchronization control between stations, thus limiting overall efficiency. More importantly, neither single-station nor linear multi-station inspection equipment can integrate the ability to simultaneously detect multiple types of defects on a single device.

[0004] There is currently a lack of a workpiece defect detection device that can achieve parallel detection of multiple workpieces, has a short detection cycle, high integration, and can meet the needs of mass production. Summary of the Invention

[0005] The purpose of this application is to provide a six-station rotary multi-defect workpiece inspection device to solve the problem that there is a lack of workpiece defect inspection devices in the prior art that can realize parallel inspection of multiple workpieces, have a short inspection cycle, high integration, and meet the needs of mass production.

[0006] To achieve the above objectives, this application provides the following technical solution: a six-station rotary multi-defect workpiece inspection device for inspecting workpieces, wherein the workpieces are provided with horizontal side holes, vertical circular holes and pillars, the horizontal side holes are horizontally arranged, the vertical circular holes are perpendicular to the horizontal side holes, and the pillars are parallel to the horizontal side holes; the device includes a rotary table, a feeding mechanism, a pillar inspection mechanism, a horizontal hole inspection mechanism and a vertical hole inspection mechanism, wherein the feeding mechanism, the pillar inspection mechanism, the horizontal hole inspection mechanism and the vertical hole inspection mechanism are arranged sequentially around the axis of the rotary table; The column detection mechanism is used to detect whether the column is broken; The horizontal hole detection mechanism is used to detect whether the horizontal side hole is a through hole and whether there is burr. The vertical hole detection mechanism is used to detect whether a vertical circular hole is a through hole and whether there is a burr. The unloading mechanism is used to grab the workpiece after inspection and place it at the unloading station.

[0007] According to one embodiment of the present invention, the horizontal side hole includes a first horizontal side hole, a second horizontal side hole, a third horizontal side hole, and a fourth horizontal side hole, and the pillar includes a first pillar and a second pillar; the first horizontal side hole, the first pillar, the second horizontal side hole, the third horizontal side hole, the second pillar, and the fourth horizontal side hole are arranged sequentially along the length direction of the workpiece; The horizontal hole detection mechanism includes a first detection mechanism and a second detection mechanism; The column detection mechanism is used to detect the first column and the second column; The first detection mechanism is used to detect the first horizontal side hole and the fourth horizontal side hole; The second detection mechanism is used to detect the second horizontal side hole and the third horizontal side hole.

[0008] According to one embodiment of the present invention, the workpiece is provided with two slots, and a connecting plate is formed at the connection of the two slots; The vertical hole detection mechanism is also used to detect whether the connecting plate is broken.

[0009] According to one embodiment of the present invention, the unloading mechanism includes a first support frame, a first radial guide rail module, a first fixing frame, a first vertical guide rail module, and an electric clamp; The first support frame is vertically arranged, the first radial guide rail module is installed on the top of the first support frame and extends along the radial direction of the turntable, the first fixing frame is fixed on the slider of the first radial guide rail module, the first vertical guide rail module is vertically installed on the first fixing frame, and the electric clamp is fixedly installed on the first vertical guide rail module.

[0010] According to one embodiment of the present invention, the column detection mechanism includes a second support frame, a first tangential guide rail module, a second fixing frame, a second vertical guide rail module, a first camera, and an annular light source; The second support frame is vertically arranged, the first tangential guide rail module is fixed to the top of the second support frame and extends along the tangential direction of the turntable, the second fixing frame is fixed to the slider of the first tangential guide rail module, the second vertical guide rail module is vertically installed on the second fixing frame, and the first camera is installed on the second fixing frame; the annular light source is fixed to the second fixing frame by a connecting rod, and the annular light source is located directly below the first camera.

[0011] According to one embodiment of the present invention, the first detection mechanism and the second detection mechanism have identical structures; The first detection mechanism includes a support base, a second tangential guide rail module, a third fixing frame, a third vertical guide rail module, and a second camera; The support base is vertically arranged, the second tangential guide rail module is mounted on the support base and extends along the tangential direction of the turntable, the third fixing frame is fixed on the slider of the second tangential guide rail module, the third vertical guide rail module is vertically mounted on the third fixing frame, and the second camera is mounted on the third vertical guide rail module.

[0012] According to one embodiment of the present invention, the first detection mechanism includes a light source mechanism, the light source mechanism includes two fixed plates, a baffle and a light source lamp, the first ends of the two fixed plates are fixed to the support base, the second ends of the fixed plates are located above the turntable, the baffle is fixed between the second ends of the two fixed plates, a detection space is formed between the two fixed plates and the baffle, and the light source lamp is disposed on the baffle and located within the detection space.

[0013] According to one embodiment of the present invention, the vertical hole detection mechanism includes a third support frame, a third tangential guide rail module, a second radial guide rail module, a fourth vertical guide rail module, and a fourth camera; The third support frame is vertical, the third tangential guide rail module is arranged on the top of the third support frame along the tangent direction of the turntable, the second radial guide rail module is fixed on the slider of the third tangential guide rail module, the fourth vertical guide rail module is vertically installed on the second radial guide rail module, and the fourth camera is installed on the fourth vertical guide rail module.

[0014] According to one embodiment of the present invention, the vertical hole detection mechanism includes a bottom light source located below the turntable and opposite to the fourth camera.

[0015] According to one embodiment of the present invention, the device includes a support base and an outer cover. The outer cover is disposed on the top of the support base and has a working cavity formed inside the outer cover. The turntable, the feeding mechanism, the column detection mechanism, the first detection mechanism, the second detection mechanism, and the vertical hole detection mechanism are disposed on the support base and located inside the working cavity of the outer cover.

[0016] Compared with the prior art, the beneficial effects of this application are: Employing a rotary table structure, this device can simultaneously inspect multiple workpieces, shortening the inspection cycle time. The rotary table rotation and inspection actions occur in parallel, eliminating idle waiting time and significantly improving inspection efficiency. Furthermore, it can simultaneously detect various defects such as column fractures, side holes and burrs, and top surface holes and burrs. In addition, workers only need to perform loading and unloading operations, reducing labor intensity, and the equipment has a small footprint and high integration. Attached Figure Description

[0017] Figure 1 This is a perspective view of the six-station rotary multi-defect workpiece inspection device of this application; Figure 2 This is a structural diagram of the six-station rotary multi-defect workpiece inspection device of this application after removing the outer cover; Figure 3 This is a structural diagram of the turntable, feeding mechanism, column detection mechanism, horizontal hole detection mechanism and vertical hole detection mechanism of this application; Figure 4 This is a structural diagram of the workpiece in this application.

[0018] In the diagram: 1. Support base; 2. Outer cover; 3. Turntable; 301. Rectangular working hole; 4. Unloading mechanism; 401. First support frame; 402. First radial guide rail module; 403. First fixed frame; 404. First vertical guide rail module; 405. Electric clamp; 5. Column detection mechanism; 501. Second support frame; 502. First tangential guide rail module; 503. Second fixed frame; 504. Second vertical guide rail module; 505. First camera; 506. Ring light source; 6. First detection mechanism; 601. Second tangential guide rail module; 602. Third fixed frame; 603. Third vertical guide rail module; 604. Second camera; 7. Second detection mechanism; 8. Vertical hole detection mechanism; 801. Third support frame; 8 02. Third tangential guide rail module; 803. Second radial guide rail module; 804. Fourth vertical guide rail module; 805. Fourth camera; 9. Light source mechanism; 901. Fixing plate; 902. Baffle; 903. Light source lamp; 10. Bottom light source lamp; 11. Touch screen; 12. Button module; 13. Tri-color lamp; 14. Industrial computer; 15. Workpiece; 151. First horizontal side hole; 152. First column; 153. Second horizontal side hole; 154. Third horizontal side hole; 155. Second column; 156. Fourth horizontal side hole; 157. Connecting plate; 158. Vertical round hole; 159. Slot; 1510. First upright plate; 1511. Second upright plate; 1512. Third upright plate; 1513. Fourth upright plate. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] It should be noted that in the description of this application, the terms "upper", "lower", "front", "back", "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.

[0021] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale; for example, the thickness or width of some layers may be exaggerated relative to other layers.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be discussed or described in detail in the description of the subsequent figures.

[0023] This application provides a technical solution: a six-station rotary multi-defect workpiece inspection device for inspecting workpiece 15. The workpiece 15 is provided with a horizontal side hole, a vertical circular hole 158 and a column. The horizontal side hole is horizontally arranged, the vertical circular hole 158 is perpendicular to the horizontal side hole, and the column is parallel to the horizontal side hole. It includes a rotary table 3, a feeding mechanism 4, a column inspection mechanism 5, a horizontal hole inspection mechanism and a vertical hole inspection mechanism 8, which are arranged sequentially around the axis of the rotary table 3. The column inspection mechanism 5 is used to detect whether the column is broken; the horizontal hole inspection mechanism is used to detect whether the horizontal side hole is through and whether there is a burr; the vertical hole inspection mechanism 8 is used to detect whether the vertical round hole 158 is through and whether there is a burr; the unloading mechanism 4 is used to grab the workpiece 15 after the inspection is completed and place it on the unloading station.

[0024] In this embodiment, the specific structure of the workpiece to be inspected is as follows: Figure 4 As shown, a first vertical plate 1510, a second vertical plate 1511, a third vertical plate 1512, and a fourth vertical plate 1513 are sequentially arranged along the length of the workpiece base. The first vertical plate 1510 and the fourth vertical plate 1513 are symmetrical about their midpoints with respect to the length of the workpiece base, and the second vertical plate 1511 and the third vertical plate 1512 are also symmetrical about their midpoints with respect to the length of the workpiece base. A first horizontal side hole 151 and a first pillar 152 are sequentially arranged from left to right on the first vertical plate 1510. A second horizontal side hole 153 is arranged on the second vertical plate 1511. A third horizontal side hole 154 is arranged on the third vertical plate 1512. A second pillar 155 and a fourth horizontal side hole 156 are sequentially arranged from left to right on the fourth vertical plate 1513. The axes of the first horizontal side hole 151, the second horizontal side hole 153, the third horizontal side hole 154, and the fourth horizontal side hole 156 are parallel.

[0025] In addition, a plurality of vertical circular holes 158 are provided on the top of the workpiece 15 along its circumference. Two slots 159 are provided on the top of the workpiece 15, the two slots 159 being located between the second vertical plate 1511 and the third vertical plate 1512, and a connecting plate 157 is formed at the connection of the two slots 159.

[0026] It should be noted that workpiece 15 is a special vehicle component that serves to position, limit, and bear load, ensuring the assembly accuracy and operational stability of the corresponding functional components of the vehicle. It is an essential functional structural component for vehicles.

[0027] The six-station rotary multi-defect workpiece inspection device provided in this application includes a support base 1 serving as the mounting base and an outer cover 2 covering the top of the support base 1. The outer cover 2 has a closed working cavity inside, used to isolate external environmental interference and ensure the stability and safety of the inspection process. The support base 1 is provided with mounting surfaces for installing and fixing the various components.

[0028] Within the working chamber, this device mainly includes a turntable 3, a feeding mechanism 4, a column detection mechanism 5, a horizontal hole detection mechanism, and a vertical hole detection mechanism 8. The horizontal hole detection mechanism comprises a first detection mechanism 6 and a second detection mechanism 7. The feeding mechanism 4, column detection mechanism 5, first detection mechanism 6, second detection mechanism 7, and vertical hole detection mechanism 8 are arranged sequentially around the axis of the turntable 3.

[0029] The column inspection mechanism 5 is used to detect whether the first column 152 and the second column 155 are broken; the horizontal hole inspection mechanism is used to detect whether the horizontal side holes are through holes and whether there are burrs. Specifically, the first inspection mechanism 6 is used to inspect the first horizontal side hole 151 and the fourth horizontal side hole 156, and the second inspection mechanism 7 is used to inspect the second horizontal side hole 153 and the third horizontal side hole 154. The vertical hole inspection mechanism 8 is used to detect whether the vertical circular hole 158 is through hole and whether there are burrs, and is also used to detect whether the connecting plate 157 is broken. The unloading mechanism 4 is used to pick up the inspected workpiece 15 and place it on the unloading station.

[0030] In this embodiment, the turntable 3 is a horizontally arranged circular flat plate structure, driven by a servo motor to achieve precise intermittent counterclockwise rotation, with each rotation angle being 60 degrees. This driving method ensures the positioning accuracy and stability of the turntable 3 during each station stop, providing a stable imaging environment for subsequent visual inspection.

[0031] Furthermore, on the upper surface of the turntable 3, six rectangular working holes 301 are evenly arranged along its circumferential edge, and the positions of these six rectangular working holes 301 correspond one-to-one with the six workstations. A positioning fixture for supporting and positioning the workpiece 15 is fixedly installed in each rectangular working hole 301. The upper surface of the positioning fixture has a positioning groove that perfectly matches the bottom shape of the workpiece 15. When the workpiece 15 is placed on the positioning fixture, precise initial positioning can be achieved, ensuring that the posture of each workpiece 15 on the turntable 3 is consistent, thereby ensuring the consistency of the camera field of view at each subsequent inspection station. The six working positions of the turntable 3 are defined sequentially according to their rotation order as follows: first station (loading station), second station (column fracture detection station), third station (detection station for the first horizontal side hole 151 and the fourth horizontal side hole 156), fourth station (detection station for the second horizontal side hole 153 and the third horizontal side hole 154), fifth station (detection station for the vertical circular hole 158), and sixth station (unloading station).

[0032] The first station is a manual material loading station, such as... Figure 1 As shown, a manual loading window is provided at the corresponding position of the first workstation. When the turntable 3 is stopped, the operator places the workpiece 15 to be inspected into the positioning fixture located at this workstation from the outside.

[0033] After the turntable 3 rotates 60 degrees counterclockwise, the workpiece 15 loaded at the first station is precisely transported to the second station. This station is equipped with a column inspection mechanism 5, which is specifically used to inspect whether the first column 152 and the second column 155 on the workpiece 15 have any broken or missing defects.

[0034] In this embodiment, refer to Figure 2 and Figure 2 The column detection mechanism 5 includes a second support frame 501, a first tangential guide rail module 502, a second fixing frame 503, a second vertical guide rail module 504, a first camera 505, and an annular light source 506.

[0035] The second support frame 501 is vertically fixed on the carrier 1, and its top horizontally supports the first tangential guide rail module 502. The extension direction of the first tangential guide rail module 502 is parallel to the tangential direction of the turntable 3 at this station. The bottom of the second fixed frame 503 is fixedly connected to the slider of the first tangential guide rail module 502. The first tangential guide rail module 502 can drive the second fixed frame 503, together with the first camera 505 on it, to move along the tangential direction of the turntable 3, thereby accurately aligning with the first post 152 and the second post 155 on the workpiece 15. The second vertical guide rail module 504 is vertically mounted on the second fixed frame 503, and the first camera 505 is fixedly mounted on the slider of the second vertical guide rail module 504. By adjusting the second vertical guide rail module 504, the object distance of the first camera 505 (i.e., the distance from the lens to the upper surface of the workpiece 15) can be precisely adjusted to ensure the clearest image is obtained.

[0036] In some embodiments, the column detection mechanism 5 further includes an annular light source 506, such as Figure 3 As shown, the annular light source 506 is fixed below the second mounting bracket 503 by a connecting rod and is located directly below the first camera 505. This annular light source 506 is preferably a low-angle annular light source.

[0037] When the turntable 3 stops and the workpiece 15 stabilizes, the control system triggers the ring light source 506 to light up and simultaneously triggers the first camera 505 to acquire images. The first camera 505 is a high-resolution industrial camera 75, which captures images of the entire upper surface of the workpiece 15 vertically downwards. The acquired images are transmitted in real time to the industrial computer 14 via a network port or USB interface. The industrial computer 14 is pre-installed with image processing software, which extracts the grayscale features and height information of the column area through image processing algorithms, compares them with a standard template, and determines whether the column has fracture defects. The detection results are recorded and stored.

[0038] It should be noted that when the workpiece 15 continues to rotate with the turntable 3 to the third station, the axis of the horizontal side hole of the workpiece 15 is perpendicular to the tangent of the turntable 3 at the third station. In other words, the length direction of the workpiece 15 is the same as the tangent direction of the turntable 3 at that station.

[0039] like Figure 4As shown, the positions of the first horizontal side hole 151 and the second horizontal side hole 153 on the workpiece 15 are different in the width direction of the workpiece 15. Therefore, if a single camera is used to simultaneously photograph all the side holes, the camera needs to constantly adjust its focus, which will cause some holes to go out of focus and the image to be blurry. To solve this problem, this application sets up two independent side hole inspection stations. The first inspection mechanism 6 and the second inspection mechanism 7 are structurally identical, but their installation positions and camera focal length configurations are different, respectively adapting to side holes at different distances. Specifically, the distance from the second camera 604 of the first inspection mechanism 6 to the first horizontal side hole 151 and the fourth horizontal side hole 156 is the same, and the distance from the camera of the second inspection mechanism 7 to the second horizontal side hole 153 and the third horizontal side hole 154 is the same.

[0040] Since the first detection mechanism 6 and the second detection mechanism 7 have identical structures, to avoid redundancy, only the first detection mechanism 6 will be described here as an example. The first detection mechanism 6 includes a support base, a second tangential guide rail module 601, a third fixing frame 602, a third vertical guide rail module 603, a second camera 604, and a specially designed light source mechanism 9. The support base is fixed to the top of the carrier 1. The second tangential guide rail module 601 is horizontally mounted on the support base, and its extension direction is parallel to the tangential direction of the turntable 3 at this station. The third fixing frame 602 is fixed to the slider of the second tangential guide rail module 601. By controlling the second tangential guide rail module 601, the entire detection unit can be moved tangentially along the turntable 3. The third vertical guide rail module 603 is vertically mounted on the third fixing frame 602. The second camera 604 is mounted on the slider of the third vertical guide rail module 603. By adjusting the third vertical guide rail module 603, the height of the second camera 604 can be precisely adjusted. The lens of the second camera 604 is used to detect whether the edge images of the first horizontal side hole 151 and the fourth horizontal side hole 156 are clear and without distortion.

[0041] In this embodiment, the light source mechanism 9 of the first detection mechanism 6 includes two fixed plates 901, a baffle 902, and a light source 903. The two fixed plates 901 are L-shaped, with their first ends fixed to a support base by bolts. The two fixed plates 901 are arranged in parallel, and their second ends extend horizontally above the turntable 3, spanning the workpiece 15. The baffle 902 is fixed between the second ends of the two fixed plates 901, thus forming a detection space that is closed on three sides and open on one side between the two fixed plates 901 and the baffle 902. When the workpiece 15 stops at this station with the turntable 3, the workpiece 15 extends precisely into this detection space. The light source 903 is a high-brightness strip LED light source, which is fixedly installed inside the baffle 902 and located within the detection space. The advantage of this design is that the darkroom structure formed by the fixed plates 901 and the baffle 902 can effectively isolate stray ambient light, providing a stable and clean lighting environment for side hole detection.

[0042] When the workpiece 15 is stabilized at the third station, the control system lights up the light source 903 at the third station and triggers the second camera 604 to take pictures. The second camera 604 takes pictures horizontally to acquire images of the first horizontal side hole 151 and the fourth horizontal side hole 156 on the workpiece 15, and transmits the images to the industrial control computer 14. Then, the light transmittance and edge contour of the hole area are analyzed by the image processing algorithm to determine whether the first horizontal side hole 151 and the fourth horizontal side hole 156 are through holes and whether there is burr at the hole opening.

[0043] Similarly, the structure of the second inspection mechanism 7 is exactly the same as that of the first inspection mechanism 6, but its installation position is set at the fourth station, and the focal length and angle of the camera and light source are adjusted to fit the second horizontal side hole 153 and the third horizontal side hole 154. Since these two holes are located in the middle of the workpiece 15 and are closer to the center of the turntable 3, the second camera 604 of the second inspection mechanism 7 is closer to the workpiece 15, and a lens with a slightly shorter focal length is used to ensure perfect focus. Its inspection principle and process are completely consistent with those of the first inspection mechanism 6, and will not be described again here.

[0044] As can be seen, by setting the first detection mechanism 6 and the second detection mechanism 7 to detect different side holes respectively, this embodiment ensures that each horizontal side hole can be detected under the best optical and imaging conditions, thereby improving the accuracy and reliability of the detection.

[0045] In this embodiment, when the workpiece 15 rotates to the fifth position, the inspection of all horizontal through holes and pillars has been completed. At this time, the vertical hole inspection mechanism 8 is responsible for inspecting the unobstructedness of the vertical circular holes 158 on the upper surface of the workpiece 15, the burrs at the hole openings, and the breakage of the connecting plate 157.

[0046] Please continue reading. Figure 2 and Figure 3 The vertical hole detection mechanism 8 includes a third support frame 801, a third tangential guide rail module 802, a second radial guide rail module 803, a fourth vertical guide rail module 804, a fourth camera 805, and a bottom light source 10.

[0047] Specifically, the third support frame 801 is vertically fixed to the bearing seat 1. The third tangential guide rail module 802 is arranged on the top of the third support frame 801 along the tangential direction of the turntable 3. The bottom of the second radial guide rail module 803 is fixed to the slider of the third tangential guide rail module 802, and its extension direction is along the radial direction of the turntable 3. The fourth vertical guide rail module 804 is vertically mounted on the slider of the second radial guide rail module 803. The fourth camera 805 is mounted on the slider of the fourth vertical guide rail module 804. That is to say, the vertical hole detection mechanism 8 is a three-axis robot. Thus, by adjusting the third tangential guide rail module 802 and the second radial guide rail module 803, the optical axis of the fourth camera 805 can be precisely aligned with the center of any vertical circular hole 158 or connecting plate 157 on the workpiece 15. By adjusting the fourth vertical guide rail module 804, the object distance can be precisely controlled. In this embodiment, the distance between the lens and the upper surface of the workpiece 15 is adjusted to 285±30mm.

[0048] In addition, the light source of the vertical hole inspection mechanism 8 consists of a bottom light source 10 located below the turntable 3, directly facing the bottom of the turntable 3 at the fifth station. When the bottom light source 10 is lit, the uniform light emitted by it passes vertically upwards through the rectangular working hole 301 and the vertical circular hole 158 of the workpiece 15. For unobstructed vertical circular holes 158, the light can pass through without obstruction, forming a very bright high-grayscale area in the image; for blocked vertical circular holes 158, the light is blocked, and the area appears as a dark area. This backlighting method provides high contrast and is an effective method for detecting the patency of through holes.

[0049] It should be noted that the inspection at the fifth station is divided into two parts: the inspection of the vertical circular hole 158 and the inspection of the breakage of the connecting plate 157. The inspection process is carried out in a time-sharing manner, that is, by adjusting the three-axis robot, the fourth camera 805 is aligned with different inspection areas in sequence and takes pictures separately.

[0050] When inspecting the vertical circular hole 158, the control system moves the fourth camera 805 above the preset vertical circular hole 158, illuminates the bottom light source 10, and triggers the fourth camera 805 to capture an image. The image processing algorithm analyzes the area, roundness, and edge burrs of the through-hole area to determine whether the vertical circular hole 158 is unobstructed and whether there are burrs at the hole opening. Then, following the same process, the remaining vertical circular holes 158 are inspected sequentially. When inspecting the connecting plate 157, the control system moves the fourth camera 805 directly above the connecting plate 157. The fourth camera 805 captures a high-resolution image, and the image processing algorithm analyzes whether the connection point in the middle of the workpiece is broken.

[0051] After all inspections are completed, workpiece 15 rotates to the sixth station, which is equipped with a feeding mechanism 4. The feeding mechanism 4 is used to remove workpieces 15 that are deemed non-conforming (NG) from the turntable 3 and place them in the non-conforming product placement area on the carrier 1, based on the comprehensive inspection results of the first five stations. For conforming (OK) products, no gripping action is performed, and they are kept on the fixture and rotated with the turntable 3 to the first station, where they are picked up by the operator.

[0052] Please continue reading. Figure 2 and Figure 3 The unloading mechanism 4 includes a first support frame 401, a first radial guide rail module 402, a first fixed frame 403, a first vertical guide rail module 404, and an electric clamp 405. The first support frame 401 is vertically fixed to the bearing seat 1. The first radial guide rail module 402 is mounted on the top of the first support frame 401, extending radially along the turntable 3. The first fixed frame 403 is fixed to the slider of the first radial guide rail module 402. The first vertical guide rail module 404 is vertically mounted on the first fixed frame 403. The electric clamp 405 is fixedly mounted on the slider of the first vertical guide rail module 404. By adjusting the first vertical guide rail module 404, the lifting and lowering of the electric clamp 405 can be controlled, enabling the clamp to move closer to and further away from the workpiece 15.

[0053] In some embodiments, the electric clamp 405 is preferably a pneumatic parallel gripper 112.

[0054] It should be noted that the industrial control computer 14 stores the results of the current workpiece 15 at all inspection stations (the second to the fifth stations). When the workpiece 15 arrives at the sixth station with the turntable 3 and the turntable 3 stops, the control system performs a logical judgment: If the overall judgment of workpiece 15 is NG (i.e., at least one defect exists), the control system executes the sorting procedure, controls the first radial guide rail module 402 to move the electric clamp 405 to directly above workpiece 15, then controls the first vertical guide rail module 404 to drive the electric clamp 405 to descend, so that the gripper fingers 116 are located on both sides of workpiece 15. Next, controls the cylinder 111 of the electric clamp 405 to move, so that the gripper fingers 116 close and firmly clamp workpiece 15. Then controls the first vertical guide rail module 404 to rise, remove workpiece 15 from the positioning fixture 41, then controls the first radial guide rail module 402 to reverse, move the electric clamp 405 to above the predetermined NG product collection box, and finally controls the electric clamp 405 to open, and workpiece 15 falls into the NG product collection box under the action of gravity. The clamp resets and waits for the next NG product.

[0055] If the overall judgment of workpiece 15 is OK, then all mechanisms of the unloading mechanism 4 will not operate, workpiece 15 will remain on the positioning fixture 41, rotate with the turntable 3 to the first station, be manually removed by the operator, and placed in the OK product collection area.

[0056] In some embodiments, such as Figure 1 As shown, a touch screen 11 and a button module 12 are installed on the front of the outer casing 2. The button module 12 includes a start knob, a stop button, an emergency stop button, and a start button. The touch screen 11 can display in real time the detection images of each workstation, the detection data of the current workpiece 15, historical statistical reports, and equipment operating parameters. Operators can set parameters (such as detection threshold, camera exposure time, and light source brightness) through the touch screen 11.

[0057] In some embodiments, a tri-color light 13 is installed on the top of the outer casing 2. The tri-color light 13 indicates different states of the device (green - running, yellow - standby or warning, red - malfunction or emergency stop).

[0058] In this embodiment, the control core of the entire device includes a PLC controller and an image processing industrial computer 14. The PLC controller is responsible for the timing logic control of the entire device. The industrial computer 14 is mainly responsible for image processing and data analysis, and it is pre-installed with image processing software and a database. The industrial computer 14 communicates with the PLC in real time via digital I / O or Ethernet, receives signals sent by the PLC, and sends the OK / NG result to the PLC in real time after completing image acquisition, analysis, and result determination.

[0059] Users interact with the device via a touchscreen 11 mounted on the device casing 2 and a button module 12. The button module 12 includes a start knob 141, a stop button 134, an emergency stop button 140, and a start button 133.

[0060] Therefore, this application has at least the following advantages: First, it adopts a six-station rotary table structure, which can simultaneously inspect 6 workpieces. The inspection cycle is shortened and the inspection efficiency is significantly improved. The rotation of the rotary table and the inspection action are parallel, with no idle waiting time.

[0061] Secondly, it can simultaneously detect multiple defects such as column fracture, side hole through holes and burrs, and top surface through holes and burrs, thus solving the problem of the single function of existing technologies.

[0062] Third, by using dual-distance detection at the third and fourth workstations, we ensure that the focal length of each camera is perfectly matched to the hole, thus improving accuracy.

[0063] Fourth, it integrates automatic detection and automatic sorting functions to achieve automated operation. Workers only need to perform loading and unloading operations at the first workstation, resulting in low labor intensity. In addition, non-compliant products are automatically sorted, eliminating the need for secondary manual screening and reducing human error.

[0064] Fifth, it adopts a six-station layout, which results in a small footprint and high integration.

[0065] Sixth, the use of machine vision technology ensures standardized testing, high consistency and reliability, and avoids the subjectivity of manual testing.

[0066] In summary, the six-station rotary multi-defect workpiece inspection device provided in this application, through its unique station layout, dual-station side hole inspection mechanism, dedicated light source system, and efficient automated process, achieves efficient, high-precision, and fully automatic synchronous inspection of more than 15 types of defects in complex workpieces.

[0067] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A six-station rotary multi-defect workpiece inspection device for inspecting workpieces (15), wherein the workpiece (15) is provided with a horizontal side hole, a vertical circular hole (158) and a column, the horizontal side hole being horizontally arranged, the vertical circular hole (158) being perpendicular to the horizontal side hole, and the column being parallel to the horizontal side hole; characterized in that, It includes a turntable (3), a feeding mechanism (4), a column detection mechanism (5), a horizontal hole detection mechanism and a vertical hole detection mechanism (8), wherein the feeding mechanism (4), the column detection mechanism (5), the horizontal hole detection mechanism and the vertical hole detection mechanism (8) are arranged in sequence around the axis of the turntable (3); The column detection mechanism (5) is used to detect whether the column is broken; The horizontal hole detection mechanism is used to detect whether the horizontal side hole is a through hole and whether there is burr. The vertical hole detection mechanism (8) is used to detect whether the vertical circular hole (158) is a through hole and whether there is a burr. The unloading mechanism (4) is used to grab the workpiece (15) after the inspection is completed and place it on the unloading station.

2. The six-station rotary multi-defect workpiece inspection device according to claim 1, characterized in that, The horizontal side holes include a first horizontal side hole (151), a second horizontal side hole (153), a third horizontal side hole (154), and a fourth horizontal side hole (156), and the pillars include a first pillar (152) and a second pillar (155); the first horizontal side hole (151), the first pillar (152), the second horizontal side hole (153), the third horizontal side hole (154), the second pillar (155), and the fourth horizontal side hole (156) are arranged sequentially along the length direction of the workpiece (15); The horizontal hole detection mechanism includes a first detection mechanism (6) and a second detection mechanism (7); The column detection mechanism (5) is used to detect the first column (152) and the second column (155). The first detection mechanism (6) is used to detect the first horizontal side hole (151) and the fourth horizontal side hole (156); The second detection mechanism (7) is used to detect the second horizontal side hole (153) and the third horizontal side hole (154).

3. The six-station rotary multi-defect workpiece inspection device according to claim 2, characterized in that, The workpiece (15) has two slots (159), and a connecting plate (157) is formed at the connection of the two slots (159). The vertical hole detection mechanism (8) is also used to detect whether the connecting plate (157) is broken.

4. The six-station rotary multi-defect workpiece inspection device according to claim 2, characterized in that, The unloading mechanism (4) includes a first support frame (401), a first radial guide rail module (402), a first fixed frame (403), a first vertical guide rail module (404), and an electric clamp (405). The first support frame (401) is vertically arranged, the first radial guide rail module (402) is installed on the top of the first support frame (401) and extends along the radial direction of the turntable (3), the first fixing frame (403) is fixed on the slider of the first radial guide rail module (402), the first vertical guide rail module (404) is vertically installed on the first fixing frame (403), and the electric clamp (405) is fixedly installed on the first vertical guide rail module (404).

5. A six-station rotary multi-defect workpiece inspection device according to claim 2, characterized in that, The column detection mechanism (5) includes a second support frame (501), a first tangential guide rail module (502), a second fixing frame (503), a second vertical guide rail module (504), a first camera (505), and an annular light source (506). The second support frame (501) is vertically arranged, the first tangential guide rail module (502) is fixed to the top of the second support frame (501) and extends along the tangential direction of the turntable (3), the second fixing frame (503) is fixed to the slider of the first tangential guide rail module (502), the second vertical guide rail module (504) is vertically installed on the second fixing frame (503), and the first camera (505) is installed on the second fixing frame (503); the annular light source (506) is fixed to the second fixing frame (503) by a connecting rod, and the annular light source (506) is located directly below the first camera (505).

6. A six-station rotary multi-defect workpiece inspection device according to claim 2, characterized in that, The first testing mechanism (6) and the second testing mechanism (7) have the same structure; The first detection mechanism (6) includes a support base, a second tangential guide rail module (601), a third fixing frame (602), a third vertical guide rail module (603), and a second camera (604). The support base is vertically arranged, the second tangential guide rail module (601) is mounted on the support base and extends along the tangential direction of the turntable (3), the third fixing frame (602) is fixed on the slider of the second tangential guide rail module (601), the third vertical guide rail module (603) is vertically mounted on the third fixing frame (602), and the second camera (604) is mounted on the third vertical guide rail module (603).

7. A six-station rotary multi-defect workpiece inspection device according to claim 6, characterized in that, The first detection mechanism (6) includes a light source mechanism (9), which includes two fixed plates (901), a baffle (902) and a light source lamp (903). The first ends of the two fixed plates (901) are fixed to the support base, and the second ends of the fixed plates (901) are located above the turntable (3). The baffle (902) is fixed between the second ends of the two fixed plates (901). A detection space is formed between the two fixed plates (901) and the baffle (902). The light source lamp (903) is located on the baffle (902) and within the detection space.

8. A six-station rotary multi-defect workpiece inspection device according to claim 2, characterized in that, The vertical hole detection mechanism (8) includes a third support frame (801), a third tangential guide rail module (802), a second radial guide rail module (803), a fourth vertical guide rail module (804), and a fourth camera (805). The third support frame (801) is vertical, the third tangential guide rail module (802) is arranged on the top of the third support frame (801) along the tangential direction of the turntable (3), the second radial guide rail module (803) is fixed on the slider of the third tangential guide rail module (802), the fourth vertical guide rail module (804) is vertically installed on the second radial guide rail module (803), and the fourth camera (805) is installed on the fourth vertical guide rail module (804).

9. A six-station rotary multi-defect workpiece inspection device according to claim 8, characterized in that, The vertical hole detection mechanism (8) includes a bottom light source (10), which is located below the turntable (3) and is positioned opposite to the fourth camera (805).

10. A six-station rotary multi-defect workpiece inspection device according to claim 2, characterized in that, It includes a support base (1) and an outer cover (2). The outer cover (2) is located on the top of the support base (1). A working cavity is formed inside the outer cover (2). The turntable (3), the feeding mechanism (4), the column detection mechanism (5), the first detection mechanism (6), the second detection mechanism (7) and the vertical hole detection mechanism (8) are located on the support base (1) and are located inside the working cavity of the outer cover (2).

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