Magnetic core surface crack detection device

Abstract

The invention belongs to the technical field of visual inspection, and particularly relates to a magnetic core surface crack detection device which comprises a machine frame, a feeding machine, a multi-direction detection table, a size detection table and a grading and plate arranging machine, and a detection unit and a plurality of mechanical arms are arranged on the multi-direction detection table; the magnetic core surface crack detection device further comprises a plurality of bearing tables, the bearing tables are fixedly arranged among the detection units, each bearing table comprises a mounting table and a table top, after a workpiece is placed on a bearing seat of the bearing table, the pressure sensor triggers the air cylinder to drive the table top to move downwards, and the bearing tables are arranged on the mounting table. At the moment, a connecting rod of a push-pull seat is in transmission between a mounting table and an L-shaped plate, the L-shaped plate is promoted to slide towards the center of a bearing seat along a trapezoidal guide block, meanwhile, an embedded rod of a lifting positioning plate slides along a V-shaped groove, transverse plates are driven to ascend and descend, the workpieces are synchronously pushed from the periphery through multiple sets of transverse plates, and automatic centering correction of the workpieces is achieved. And meanwhile, the descending transverse plate provides a larger grabbing space for the workpiece.

Description

Technical Field

[0001] This invention belongs to the field of visual inspection technology, specifically relating to a device for detecting cracks on the surface of magnetic cores. Background Technology

[0002] Magnetic cores are the core magnetic components in electronic circuits that realize electromagnetic energy conversion, filtering, and energy storage. They are usually made of magnetic materials such as ferrite and silicon steel sheets and are widely used in electronic equipment such as transformers, inductors, and sensors. The integrity of their surface directly determines the insulation performance, magnetic permeability, and service life of electronic components. In order to efficiently and accurately detect cracks on the surface of magnetic cores, visual inspection equipment has become a core inspection tool: the equipment uses a high-resolution industrial camera to collect multi-angle surface images of the magnetic core, and combined with image preprocessing and machine vision algorithms, it can automatically identify micro-cracks that are difficult to distinguish with the naked eye.

[0003] In magnetic core surface crack detection equipment, the transfer of workpieces by the robotic arm via the carrier platform is a crucial step. However, traditional equipment has significant drawbacks: First, it lacks an effective workpiece positioning mechanism. When the robotic arm places the workpiece, it is easily affected by environmental vibrations, unstable end-effector gripping and adsorption forces, and uneven workpiece surfaces, causing the workpiece to shift on the carrier platform. In the next stage, the robotic arm cannot accurately grasp the workpiece, resulting in the workpiece falling off. Second, the motion paths of multiple robotic arms are not planned. When the robotic arms move around the carrier platform, their motion ranges overlap and their paths intersect. If the adjustment action is made due to workpiece shift or improper parameter settings, motion interference is very likely to occur. This can result in anything from machine shutdown and reset to collision and damage to components. Summary of the Invention

[0004] The purpose of this invention is to provide a device for detecting surface cracks in magnetic cores that can stably transport the workpiece under test in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions: A device for detecting surface cracks in magnetic cores includes a frame, a feeder, a multi-directional inspection table, a dimensional inspection table, and a sorting and grading plate machine. The multi-directional inspection table is equipped with an inspection unit and multiple robotic arms. It also includes: A support platform, wherein multiple support platforms are provided and fixedly arranged among the testing units, the support platform includes an installation platform and a table surface, the table surface is movably connected to the installation platform, and the table surface includes a V-shaped groove; A push-pull base, the push-pull base including an L-shaped plate, the L-shaped plate being slidably disposed on a table surface, and a connecting rod being hinged between the L-shaped plate and the mounting table; A lifting positioning plate is slidably mounted on an L-shaped plate.

[0006] As a further optimization of the present invention, the support platform also includes a column, the mounting platform is fixedly installed on the top of the column, and cylinders are fixedly installed on both sides of the mounting platform. The output end of the cylinder passes through the mounting platform and is fixedly connected to the platform surface.

[0007] As a further optimization of the present invention, the platform also includes a support seat, the support seat is connected to the cylinder, the support seat has accommodating cavities on its four sides, the V-shaped groove is formed on both sides of the accommodating cavity, and a pressure sensor is fixedly installed on the support seat.

[0008] As a further optimization of the present invention, a guide groove is provided on the lower surface of the L-shaped plate, a trapezoidal guide block is fixedly provided in the receiving cavity, the guide groove cooperates with the trapezoidal guide block, a hinge seat one is fixedly provided on the L-shaped plate, a hinge seat two is fixedly provided on the four sides of the mounting platform, the connecting rod is hinged between the hinge seat two and the hinge seat one, a boss is fixedly provided on the L-shaped plate, and a guide rod is fixedly provided on the boss.

[0009] As a further optimization of the present invention, the lifting positioning plate includes a horizontal plate, with embedded rods fixedly arranged on both sides of the horizontal plate, and a sliding groove is formed on the lower surface of the horizontal plate.

[0010] As a further optimization of the present invention, the slide groove is sleeved on the guide rod, and the cross plate is slidably mounted on the boss via the guide rod.

[0011] As a further optimization of the present invention, the embedding rod is slidably disposed in the V-shaped groove, and the cross plate is slidably disposed in the receiving cavity via the embedding rod.

[0012] As a further optimization of the present invention, the detection unit includes a first detection mechanism, a second detection mechanism and a third detection mechanism, and each of the first detection mechanism, the second detection mechanism and the third detection mechanism includes a detection camera and a flash. The first testing mechanism includes a through-mount frame, which is installed through a multi-directional testing platform. The testing camera and flash are slidably mounted on the through-mount frame. The flash is located above the testing camera. A glass stage one is fixedly mounted on the flash. A glass stage two is mounted on one side of the glass stage one. A light angle testing camera is mounted below the glass stage two. One of the robotic arms is located on one side of the through-mount frame. An electromagnetic component is fixedly mounted on the robotic arm. The second inspection mechanism includes a vertical mounting frame, on which the inspection camera and flash are slidably mounted. The inspection camera is located above the flash, and one of the robotic arms is located on one side of the vertical mounting frame. A clamping component is fixedly mounted on the robotic arm. The third inspection mechanism includes a horizontal mounting frame, on which the inspection camera and flash are slidably mounted. The inspection camera is located on one side of the flash, and a robotic arm with clamping components is provided on one side of the horizontal mounting frame.

[0013] As a further optimization of the present invention, the multi-directional detection table is mounted on the frame, the feeding machine is mounted on one side of the frame, the size detection table is mounted on the frame, and the grading and tray-stacking machine is mounted on one side of the size detection table.

[0014] The beneficial effects of this invention are as follows: 1. Unlike existing technologies, in actual use, after the workpiece is placed on the support seat of the support platform, the pressure sensor triggers the cylinder to move the platform downward. At this time, the connecting rod of the push-pull seat is transmitted between the mounting platform and the L-shaped plate, causing the L-shaped plate to slide along the trapezoidal guide block towards the center of the support seat. At the same time, the embedded rod of the lifting positioning plate slides along the V-shaped groove, causing the horizontal plate to rise and then fall. Through multiple sets of horizontal plates, the workpiece is pushed synchronously from all sides, realizing automatic centering correction of the workpiece. At the same time, the falling horizontal plate provides a larger gripping space for the workpiece, avoiding the position deviation problem of traditional positioning mechanisms, ensuring the accuracy of the workpiece position when the robotic arm grips and the inspection camera takes pictures, and greatly improving the reliability of the inspection data. 2. Unlike existing technologies, in actual use, the cylinder of the bearing platform drives the platform to switch between "high-position placement and low-position retrieval". In conjunction with the lifting and lowering action of the horizontal plate of the lifting positioning plate, when placing the part, the horizontal plate is at a high position with the platform and is not stored in the receiving cavity, providing sufficient space for the robotic arm to place the workpiece and avoiding interference between parts; before retrieval, the horizontal plate is positioned and then stored in the receiving cavity, and the platform is lowered to a low position, which facilitates the robotic arm to quickly grasp the part and effectively avoids the movement trajectory of adjacent robotic arms. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is the present invention. Figure 1 Internal structure diagram; Figure 3 This is a schematic diagram of the multi-directional detection stage structure of the present invention; Figure 4 This is a schematic diagram of the structure of the first detection mechanism of the present invention; Figure 5 This is a schematic diagram of the structure of the second detection mechanism of the present invention; Figure 6 This is a schematic diagram of the third detection mechanism of the present invention; Figure 7 This is a schematic diagram of the support platform connection structure of the present invention; Figure 8 This is the present invention. Figure 7 Explosion structure diagram; Figure 9 This is a schematic diagram of the exploded structure of the tabletop of the present invention; Figure 10 This is a schematic diagram of the horizontal plate structure of the present invention.

[0016] In the diagram: 1. Frame; 2. Feeder; 3. Grading and tray-stacking machine; 4. Multi-directional inspection table; 41. Robotic arm; 411a. Electromagnetic component; 411b. Clamping component; 42. Inspection unit; 42a. First inspection mechanism; 421a. Through-type mounting frame; 42b. Second inspection mechanism; 421b. Vertical mounting frame; 42c. Third inspection mechanism; 421c. Horizontal mounting frame; 422. Inspection camera; 423. Flash light; 424. Glass stage one; 425. Glass stage two; 426. Optical angle inspection... 5. Measurement camera; 6. Dimension measuring table; 7. Supporting platform; 8. Column; 9. Mounting platform; 10. Cylinder; 11. Table surface; 12. Support seat; 13. Receiving cavity; 24. Pressure sensor; 35. V-groove; 66. Push-pull seat; 77. L-shaped plate; 78. Boss; 79. Guide rod; 10. Hinge seat one; 11. Connecting rod; 12. Hinge seat two; 13. Trapezoidal guide block; 14. Guide groove; 15. Lifting positioning plate; 16. Horizontal plate; 17. Embedded rod; 18. Slide groove. Detailed Implementation

[0017] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0018] Example 1, as Figure 1 - Figure 3As shown, the device for detecting surface cracks in magnetic cores includes a frame 1, a feeder 2, a multi-directional inspection table 4, a dimensional inspection table 5, and a sorting and tray-mounting machine 3 (the above structures are existing structures and will not be described in detail). The multi-directional inspection table 4 is mounted on the frame 1, the feeder 2 is mounted on one side of the frame 1, the dimensional inspection table 5 is mounted on the frame 1, and the sorting and tray-mounting machine 3 is mounted on one side of the dimensional inspection table 5. The multi-directional inspection table 4 is equipped with an inspection unit 42 and multiple robotic arms 41. The frame 1 serves as the supporting foundation for the entire device, providing a stable mounting platform for the feeder 2, the multi-directional inspection table 4, and the dimensional inspection table 5, preventing inspection deviations caused by unstable installation of various components. The feeder 2, located on one side of the frame 1, enables automatic feeding of the magnetic cores to be tested, reducing the need for manual feeding. The system minimizes labor costs and efficiency losses while ensuring the continuity and orderliness of magnetic core transportation. The multi-directional inspection station 4, located on the frame 1, serves as the core inspection area, integrating the inspection unit 42 and multiple robotic arms 41. It can centrally complete multi-directional crack inspection of magnetic cores, reducing the transfer distance between different inspection areas and improving inspection efficiency. The dimensional inspection station 5, located on the frame 1, can directly inspect the dimensions of magnetic cores after crack inspection, achieving integrated inspection of "cracks plus dimensions" and avoiding interruption of the inspection process. The sorting and traying machine 3, located on one side of the dimensional inspection station 5, can quickly receive magnetic cores after inspection and sort them according to the inspection results, reducing subsequent sorting processes. All components are arranged around the frame 1, making the overall device structure compact and saving installation space.

[0019] like Figure 4 - Figure 6 As shown, the inspection unit 42 includes a first inspection mechanism 42a, a second inspection mechanism 42b, and a third inspection mechanism 42c. Each of the first inspection mechanism 42a, the second inspection mechanism 42b, and the third inspection mechanism 42c includes an inspection camera 422 and a flash lamp 423. This allows for the separate inspection of different surfaces of the magnetic core, achieving comprehensive crack coverage and avoiding the omission of cracks from a single inspection angle. The flash lamp 423 provides supplementary lighting to eliminate shadows on the surface of the magnetic core, ensuring that the images captured by the inspection camera 422 are clear and improving the accuracy of crack identification. like Figure 4As shown, the first detection mechanism 42a includes a through-mount frame 421a, which is through-mounted on the multi-directional detection stage 4. The detection camera 422 and flash 423 are slidably mounted on the through-mount frame 421a and fixed with locking nuts. The flash 423 is located above the detection camera 422. A first glass stage 424 is fixedly mounted on the flash 423. A second glass stage 425 is mounted on one side of the first glass stage 424. A beam angle detection camera 426 is mounted below the second glass stage 425. The second glass stage 425 and the beam angle detection camera 426... The inspection cameras 426 are all slidably mounted on the through-type mounting bracket 421a and fixed with locking nuts. One of the robotic arms 41 is located on one side of the through-type mounting bracket 421a, and an electromagnetic component 411a is fixedly mounted on the robotic arm 41. The first glass stage 424 is mounted on the flash lamp 423, which can both support the magnetic core and, due to the light-transmitting properties of the glass, does not affect the supplementary lighting of the flash lamp 423 and the shooting of the inspection camera 422. The second glass stage 425 and the light angle inspection camera 426 below it can capture the entire target, comprehensively inspect the magnetic core, and supplement the blind spots of the bottom inspection. like Figure 5 As shown, the second detection mechanism 42b includes a vertical mounting bracket 421b, a detection camera 422 and a flash 423 are slidably mounted on the vertical mounting bracket 421b and fixed with a locking nut. The detection camera 422 is located above the flash 423. One of the robotic arms 41 is located on one side of the vertical mounting bracket 421b. A clamping member 411b is fixedly mounted on the robotic arm 41. Thus, the second detection mechanism 42b is adapted to detect cracks on the top of the magnetic core. like Figure 6 As shown, the third inspection mechanism 42c includes a horizontal mounting frame 421c, an inspection camera 422 and a flash lamp 423 are slidably mounted on the horizontal mounting frame 421c and fixed with a locking nut. The inspection camera 422 is located on one side of the flash lamp 423. A robotic arm 41 with a clamping member 411b is provided on one side of the horizontal mounting frame 421c. Thus, the third inspection mechanism 42c facilitates the inspection of cracks in the sidewall of the magnetic core.

[0020] like Figure 7 - Figure 9As shown, a support platform 6 is fixedly installed between the testing units 42. The support platform 6 includes a column 61, and a mounting platform 611 is fixedly installed at the top of the column 61. Cylinders 62 are fixedly installed on both sides of the mounting platform 611. The output end of the cylinder 62 passes through the mounting platform 611 and is fixedly connected to a support seat 631. The support seat 631 has four accommodating cavities 632 on its four sides, and V-shaped grooves 634 are opened on both sides of the accommodating cavities 632. A pressure sensor 633 is fixedly installed on the support seat 631. The support platform 6 is fixed between the testing units 42 and can be used as a magnetic core in different testing machines. The transition platform for inter-component transfer enhances process continuity; the column 61 provides stable support for the mounting platform 611, ensuring the overall structure of the bearing platform 6 is stable and preventing the platform from shaking when the magnetic core is placed; the cylinders 62 on both sides of the mounting platform 611 can drive the bearing seat 631 to lift and lower, realizing "high-position placement and low-position retrieval", avoiding the intersection of movement trajectories of different robotic arms 41 when transferring the magnetic core, and reducing the risk of collision; the pressure sensor 633 on the bearing seat 631 can sense whether the magnetic core is placed in place in real time, and promptly feed back signals to the control system to trigger subsequent lifting and positioning actions.

[0021] like Figure 8 - Figure 9 As shown, an L-shaped plate 71 is slidably mounted on the platform 63. A guide groove 741 is formed on the lower surface of the L-shaped plate 71. A trapezoidal guide block 74 is fixedly mounted in the receiving cavity 632. The guide groove 741 cooperates with the trapezoidal guide block 74. A first hinge seat 713 is fixedly mounted on the L-shaped plate 71. A second hinge seat 73 is fixedly mounted on the four sides of the mounting platform 611. A connecting rod 72 is hinged between the second hinge seat 73 and the first hinge seat 713. A boss 711 is fixedly mounted on the L-shaped plate 71. A guide rod 712 is fixedly mounted on the boss 711. The guide groove 741 on the lower surface of the L-shaped plate 71 cooperates with the trapezoidal guide block 74 in the receiving cavity 632 to limit the sliding direction of the L-shaped plate 71, prevent it from deviating during sliding, and ensure accurate motion trajectory; the hinge seat 713 of the L-shaped plate 71 and the hinge seat 73 of the mounting platform 611 are hinged through the connecting rod 72, which can convert the lifting motion of the bearing seat 631 driven by the cylinder 62 into the horizontal sliding of the L-shaped plate 71 without the need for an additional power source, thus improving process coordination; the boss 711 on the L-shaped plate 71 provides a stable mounting base for the guide rod 712.

[0022] like Figure 10As shown, a lifting positioning plate 8 is slidably mounted on the L-shaped plate 71. The lifting positioning plate 8 includes a horizontal plate 81, with embedded rods 82 fixedly mounted on both sides of the horizontal plate 81. A groove 83 is formed on the lower surface of the horizontal plate 81, and the groove 83 is sleeved on the guide rod 712. The horizontal plate 81 is slidably mounted on the boss 711 via the guide rod 712. The embedded rods 82 are slidably mounted in the V-shaped groove 634, and the horizontal plate 81 is slidably mounted in the receiving cavity 632 via the embedded rods 82. The lifting positioning plate 8 sliding on the L-shaped plate 71 can achieve precise positioning of the magnetic core, ensuring that the magnetic core is in a safe position. During detection, the device is positioned in a preset location, improving the accuracy of the detection camera 422's images. The embedded rods 82 on both sides of the horizontal plate 81 cooperate with the V-shaped grooves 634 of the receiving cavity 632, providing sliding guidance for the horizontal plate 81 and utilizing the structural characteristics of the V-shaped grooves 634 to achieve lifting and lowering when the horizontal plate 81 slides, eliminating the need for an additional lifting power source and achieving a "sliding plus lifting" linkage action. The sliding groove 83 on the lower surface of the horizontal plate 81 is fitted onto the guide rod 712, further restricting the movement trajectory of the horizontal plate 81, preventing it from deviating during sliding or lifting, and ensuring accurate positioning.

[0023] First, the feeder 2, installed on one side of the frame 1, starts, conveying the magnetic core workpieces to be tested one by one to the multi-directional inspection table 4 fixed in the center of the frame 1 via a conveyor belt. At this time, the robotic arm 41 on the multi-directional inspection table 4, near the feeder 2, starts. The robotic arm 41 first moves to the end of the conveyor belt, and after the electromagnetic component 411a is energized to attract the workpiece, it is lifted and moved horizontally to the glass stage 424 of the first inspection mechanism 42a, and the power is turned off to release the workpiece. Subsequently, the flash lamp 423 on the through-type mounting bracket 421a of the first inspection mechanism 42a provides supplementary lighting to eliminate shadows, and the inspection camera 422 vertically photographs the bottom of the workpiece to complete the preliminary inspection of bottom cracks. After the bottom inspection is completed, the gripper 411b mounted on the robotic arm 41, located between the first inspection mechanism 42a and the support platform 6 on the multi-directional inspection table 4, is activated. It clamps the workpiece from the glass stage 424, lifts it, and moves it above the platform 63 of the support platform 6. At this time, the cylinders 62 on both sides of the mounting plate 611 at the top of the column 61 are fully extended, causing the support seat 631 of the platform 63 to rise. The support platform 6 is now in a high position, matching the clamping height of the robotic arm 41. The robotic arm 41 places the workpiece through the gripper 411b. After the pressure sensor 633 on the support seat 631 senses the pressure, it sends a signal to the control system, causing the cylinder 62 to retract and slowly lower the platform 63.

[0024] As the platform 63 descends, the push-pull seat 7 begins to move in tandem: the connecting rod 72 between the hinge seat 2 73 on the four sides of the mounting platform 611 and the hinge seat 1 713 on the L-shaped plate 71 is pulled, and the L-shaped plate 71 slides towards the center along the trapezoidal guide block 74 in the receiving cavity 632 of the bearing seat 631. At the same time, the embedding rod 82 of the lifting positioning plate 8 slides along the inverted V-shaped groove 634 on both sides of the receiving cavity 632. Because the upper half of the V-shaped groove 634 is an uphill structure, the horizontal plate 81 rises along the guide rod 712 on the boss 711, pushing the workpiece from all sides towards the center to initially correct its position; after the embedding rod 82 slides past the apex of the V-shaped groove 634, the horizontal plate 81 moves down along the guide rod 712, continuing to push the workpiece towards the center until the L-shaped plate 71 moves to its limit position, the horizontal plate 81 is completely retracted into the receiving cavity 632, the workpiece is precisely centered, at this time the cylinder 62 fully retracts, and the platform 63 descends to its low position. After the workpiece is centered, the robotic arm 41 on the multi-directional inspection table 4, which is located on the other side of the support table 6, is activated: if the top is being inspected, the clamping component 411b clamps the workpiece and lifts it up, and the robotic arm 41 moves the clamping component 411b to the area of ​​the second inspection mechanism 42b; if the four walls are being inspected, the electromagnetic component 411a attracts the workpiece and lifts it up, and the robotic arm 41 moves the electromagnetic component 411a to the area of ​​the third inspection mechanism 42c.

[0025] After surface crack detection is completed, the image is transmitted to the image processing system, which compares it with a standard image to identify crack parameters and determine whether the workpiece is qualified or not. Then, the robotic arm 41 transfers the workpiece to the dimensional inspection table 5 on the frame 1 to inspect the workpiece's key dimensions. The dimensional and surface inspection results are integrated to generate a comprehensive report. Finally, based on the report, the robotic arm 41 transfers qualified and unqualified workpieces to different trays on the grading and traying machine 3 on one side of the dimensional inspection table 5, completing the entire inspection process.

[0026] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A device for detecting surface cracks in magnetic cores, comprising a frame (1), a feeder (2), a multi-directional inspection table (4), a dimensional inspection table (5), and a sorting and grading tray machine (3), characterized in that: The multi-directional testing station (4) is equipped with a testing unit (42) and multiple robotic arms (41). It also includes: The support platform (6) is provided in multiple and fixedly arranged between the testing units (42). The support platform (6) includes an installation platform (611) and a table surface (63). The table surface (63) is movably connected to the installation platform (611) and includes a V-groove (634). Push-pull seat (7), the push-pull seat (7) includes an L-shaped plate (71), the L-shaped plate (71) is slidably disposed on the table surface (63), and a connecting rod (72) is hinged between the L-shaped plate (71) and the mounting table (611). The lifting positioning plate (8) is slidably mounted on the L-shaped plate (71).

2. The device for detecting surface cracks in magnetic cores according to claim 1, characterized in that: The support platform (6) also includes a column (61), the mounting platform (611) is fixedly installed on the top of the column (61), and cylinders (62) are fixedly installed on both sides of the mounting platform (611). The output end of the cylinder (62) passes through the mounting platform (611) and is fixedly connected to the platform surface (63).

3. The device for detecting surface cracks in magnetic cores according to claim 2, characterized in that: The platform (63) also includes a support seat (631), which is connected to the cylinder (62). The support seat (631) has four accommodating cavities (632) on its four sides. The V-shaped groove (634) is opened on both sides of the accommodating cavity (632). A pressure sensor (633) is fixedly installed on the support seat (631).

4. The device for detecting surface cracks in magnetic cores according to claim 3, characterized in that: The lower surface of the L-shaped plate (71) is provided with a guide groove (741). A trapezoidal guide block (74) is fixedly installed in the receiving cavity (632). The guide groove (741) cooperates with the trapezoidal guide block (74). A hinge seat one (713) is fixedly installed on the L-shaped plate (71). A hinge seat two (73) is fixedly installed on the four sides of the mounting platform (611). The connecting rod (72) is hinged between the hinge seat two (73) and the hinge seat one (713). A boss (711) is fixedly installed on the L-shaped plate (71). A guide rod (712) is fixedly installed on the boss (711).

5. The device for detecting surface cracks in magnetic cores according to claim 4, characterized in that: The lifting positioning plate (8) includes a horizontal plate (81), and embedded rods (82) are fixedly provided on both sides of the horizontal plate (81). A sliding groove (83) is provided on the lower surface of the horizontal plate (81).

6. The device for detecting surface cracks in magnetic cores according to claim 5, characterized in that: The groove (83) is sleeved on the guide rod (712), and the cross plate (81) is slidably mounted on the boss (711) through the guide rod (712).

7. The device for detecting surface cracks in magnetic cores according to claim 5, characterized in that: The embedding rod (82) is slidably disposed in the V-groove (634), and the horizontal plate (81) is slidably disposed in the receiving cavity (632) via the embedding rod (82).

8. The device for detecting surface cracks in magnetic cores according to claim 1, characterized in that: The detection unit includes a first detection mechanism (42a), a second detection mechanism (42b) and a third detection mechanism (42c), and each of the first detection mechanism (42a), the second detection mechanism (42b) and the third detection mechanism (42c) includes a detection camera (422) and a flash (423). The first testing mechanism (42a) includes a through-mount frame (421a), which is through-mounted on a multi-directional testing platform (4). The testing camera (422) and the flash (423) are slidably mounted on the through-mount frame (421a). The flash (423) is located above the testing camera (422). A glass stage one (424) is fixedly mounted on the flash (423). A glass stage two (425) is mounted on one side of the glass stage one (424). A light angle testing camera (426) is mounted below the glass stage two (425). One of the robotic arms (41) is located on one side of the through-mount frame (421a). An electromagnetic component (411a) is fixedly mounted on the robotic arm (41). The second inspection mechanism (42b) includes a vertical mounting frame (421b), on which the inspection camera (422) and the flash (423) are slidably mounted. The inspection camera (422) is located above the flash (423), and one of the robotic arms (41) is located on one side of the vertical mounting frame (421b). A clamping member (411b) is fixedly mounted on the robotic arm (41). The third inspection mechanism (42c) includes a horizontal mounting frame (421c), on which the inspection camera (422) and the flash (423) are slidably mounted. The inspection camera (422) is located on one side of the flash (423), and a robotic arm (41) with a clamping component (411b) is provided on one side of the horizontal mounting frame (421c).

9. The device for detecting surface cracks in magnetic cores according to claim 1, characterized in that: The multi-directional inspection station (4) is set on the frame (1), the feeding machine (2) is set on one side of the frame (1), the size inspection station (5) is set on the frame (1), and the grading and plate-setting machine (3) is set on one side of the size inspection station (5).

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