A surface defect detection device for a new material neodymium iron boron production

Abstract

The application discloses a surface defect detection device for producing a new material neodymium-iron-boron, relates to the technical field of neodymium-iron-boron production detection equipment, and comprises a workbench, a detection host is arranged on the top of the workbench, a placing table is fixedly installed on the top of the workbench, an arc-shaped groove is formed in the top of the placing table, and the placing table is used for placing a special-shaped neodymium-iron-boron workpiece, and the device further comprises a vertical plate, the vertical plate is fixedly installed on the top of the workbench, a rectangular groove is formed in one side of the vertical plate close to the placing table, a carrying support is fixedly installed on the top of the workbench, and the closed detection space is formed by cooperation of the light shield plate and the vertical plate, the interference of natural light is isolated, the uniform light distribution of the ring-shaped light lamp is matched, micron-level defect characteristics can be clearly presented on the surface of the special-shaped neodymium-iron-boron workpiece, and the missing detection rate and the false detection rate are reduced.

Description

Technical Field

[0001] This invention relates to the field of testing equipment for neodymium iron boron (NdFeB) production, specifically to a surface defect detection device for the production of a new material, NdFeB. Background Technology

[0002] The surface defect detection device for NdFeB production is a specialized surface defect detection device for irregularly shaped NdFeB magnets such as tube supports and arc shapes. It can achieve high-precision detection of defects such as cracks, scratches, burrs, and missing corners on the surface of NdFeB magnets.

[0003] Patent publication number CN222618523U relates to a surface defect detection device for NdFeB production. The device includes a workbench with an entry guide bar on one side of the top for vertical entry of annular NdFeB rings. A vertical limiting conveying device for the annular NdFeB rings is located on the workbench on the exit side of the entry guide bar. An internal surface defect detection device for detecting internal surface defects of the annular NdFeB rings on the limiting conveying device is located on the top of the workbench on the side of the limiting conveying device. This patent detects defects on the inner surface of the annular NdFeB rings. When a vision inspection instrument detects a defect on the inner surface, it sends a signal to a controller. The controller receives and processes the signal and activates an alarm to alert the inspector. This streamlined conveying and detection method is highly efficient, ensuring the performance and reliability of NdFeB products and reducing the risk of malfunctions or damage during use.

[0004] In the aforementioned patent, the controller automatically triggers the alarm to provide audible and visual alerts, promptly reminding inspection personnel to sort out defective workpieces. This effectively improves the convenience of inspection operations and the efficiency of defective workpiece identification. However, when inspecting the concave surface of irregularly shaped NdFeB workpieces, it is easily affected by external natural light, leading to uneven illumination and localized reflections on the concave surface. Frequent manual adjustments to the angle of the supplementary light are required to ensure uniform illumination on the concave surface. Furthermore, if a stable workpiece constraint structure is lacking during the inspection process, the workpiece is prone to displacement or shaking, which affects the image acquisition accuracy of the visual inspection camera and makes it difficult to guarantee the reliability of the inspection results. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a new surface defect detection device for the production of neodymium iron boron materials, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a surface defect detection device for the production of neodymium iron boron (NdFeB) material, comprising a workbench, a detection host mounted on the top of the workbench, a placement platform fixedly mounted on the top of the workbench, an arc-shaped groove on the top of the placement platform for placing irregularly shaped NdFeB workpieces, the irregularly shaped NdFeB workpieces being in the shape of tube supports; a vertical plate fixedly mounted on the top of the workbench, the vertical plate having a rectangular groove on the side near the placement platform; a mounting bracket fixedly mounted on the top of the workbench; a linear electric cylinder fixedly mounted on the top of the mounting bracket, the output end of the linear electric cylinder slidingly penetrating the surface of the mounting bracket; and a mounting plate fixedly mounted on the output end of the linear electric cylinder. Above, the linear electric cylinder is used to drive the mounting plate to move up and down vertically; the visual inspection camera is fixedly installed at the bottom center of the mounting plate, and the visual inspection camera is equipped with a data transmission module. The data transmission module is used to transmit the inspection image to the inspection host. The visual inspection camera completes image acquisition of the irregular NdFeB workpiece directly below, and transmits the acquired image data to the inspection host. After analysis and processing by the inspection host, the inspection result is fed back to the electronic screen in real time for the inspection personnel to view the result; the light shield is fixedly installed at the bottom of the mounting plate. The light shield is used to isolate the interference of external natural light on the inspection field of view. When the linear electric cylinder is activated, its output end drives the mounting plate to move downward, which in turn drives the visual inspection camera and the light shield fixed at the bottom of the mounting plate to move downward synchronously.

[0007] According to the above technical solution, a ring light is fixedly installed at the bottom of the mounting plate. The ring light is coaxially arranged with the visual inspection camera. The ring light is used to provide uniform illumination to the irregular neodymium iron boron workpiece on the placement platform. When the mounting plate moves downward, it moves downward synchronously with the ring light fixed at its bottom.

[0008] According to the above technical solution, the two sides of the light shield match the size of the rectangular groove of the vertical plate, the vertical height of the light shield is consistent with the vertical height of the vertical plate, the light shield precisely aligns with the rectangular groove of the vertical plate during the downward movement, and its bottom fits against the worktable.

[0009] According to the above technical solution, a guide sleeve is fixedly inserted through the top of the mounting bracket, and a round rod is fixedly installed on the top of the mounting plate. The round rod fits against the inner wall of the guide sleeve, and the guide sleeve forms a precise guiding constraint on the round rod, so that the round rod always maintains a vertical posture.

[0010] According to the above technical solution, the vertical plate is provided with an auxiliary device for improving the stability of the lifting and lowering of the light-shielding plate, and the vertical plate is also provided with a clamping device for positioning irregularly shaped NdFeB workpieces; the auxiliary device includes a mounting base, a sliding block, a spring, and a contact block. During the downward movement of the light-shielding plate, it contacts the top of the contact block and applies downward pressure, driving the contact block to move downward synchronously. The mounting base is fixedly inserted through the inner wall of the vertical plate, the sliding block is slidably installed on the inner wall of the mounting base, the spring is disposed between the mounting base and the sliding block, the contact block is fixedly installed on the top of the sliding block, the contact block slides through the top of the mounting base, the contact block drives the sliding block to move downward synchronously, and the sliding block axially compresses the spring.

[0011] According to the above technical solution, a guide frame is fixedly inserted through the outer wall of the mounting base, the guide frame is fixedly inserted through the outer wall of the vertical plate, and a linkage rod is fixedly installed on the side of the sliding block near the guide frame. The linkage rod is in contact with the inner wall of the guide frame, and the sliding block drives the linkage rod to move synchronously during the displacement process.

[0012] According to the above technical solution, the clamping device includes an assembly box, a rectangular slider, a connecting rod, a linkage plate, and a lower pressure plate. The assembly box is fixedly inserted through the surface of the vertical plate. The rectangular slider is slidably installed on the inner wall of the assembly box. The connecting rod is fixedly inserted through the surface of the rectangular slider. The linkage plate is fixedly installed at the end of the connecting rod away from the placement platform. The linkage plate is fixedly connected to the circumferential surface of the linkage rod. When the linkage rod moves down synchronously with the sliding block, it drives the linkage plate fixed to it to move down synchronously. The lower pressure plate is fixedly installed at the other end of the connecting rod.

[0013] According to the above technical solution, a rod is fixedly inserted through the bottom of the lower pressure plate, and an anti-slip pad is fixedly installed at the bottom end of the rod. The continuously moving lower pressure plate applies a stable downward pressure to the irregular NdFeB workpiece through the anti-slip pad, temporarily pressing and fixing the irregular NdFeB workpiece on the arc groove of the placement platform.

[0014] This invention provides a surface defect detection device for the production of neodymium iron boron (NdFeB) material. It has the following beneficial effects: (1) The surface defect detection device for the production of neodymium iron boron material has a guide sleeve that provides precise guidance and constraint to the round rod, so that the round rod always maintains a vertical posture. Through the combination of the guide sleeve and the round rod, the mounting plate is prevented from tilting and shaking during displacement, so that the visual inspection camera always maintains a vertical and facing posture with the placement table, thereby improving the defect recognition rate. At the same time, the light shield and the vertical plate work together to form a detection space without natural light interference around the placement table. The light shield and the vertical plate work together to form a closed detection space, which isolates the interference of natural light. With the uniform lighting of the ring light lamp, the surface of the irregular neodymium iron boron workpiece can clearly show the micron-level defect features, reducing the missed detection and false detection rate.

[0015] (2) The surface defect detection device for the production of neodymium iron boron material has an upward elastic reaction force generated by the compressed spring. Through the elastic reaction force of the spring, the contact block is pressed against the surface of the light shield, ensuring the sealing and fitting effect between the light shield and the vertical plate and the mounting base, effectively blocking the external natural light. At the same time, the contact block applies an upward auxiliary push force to the bottom of the light shield until the light shield and the contact block are completely separated. Through the extension and recovery of the spring, it provides an auxiliary push force for the light shield in the initial stage of reset, which reduces the load pressure of the linear electric cylinder and ensures the smoothness of the reset process of the light shield.

[0016] (3) The surface defect detection device for the production of neodymium iron boron material has a lower pressure plate that applies stable downward pressure to the irregular neodymium iron boron workpiece through anti-slip pads, temporarily pressing and fixing the irregular neodymium iron boron workpiece on the arc groove of the placement table. The pressing and fixing of the irregular neodymium iron boron workpiece is completed when the light shield moves down, ensuring that the irregular neodymium iron boron workpiece always maintains a stable posture when the visual inspection camera collects images, thereby improving the accuracy of the detection results. At the same time, the linkage rod drives the linkage plate to move up synchronously, and the linkage plate then drives the connecting rod and the lower pressure plate to move up synchronously. During the process of the light shield moving up and resetting, the pressing and fixing of the irregular neodymium iron boron workpiece is released simultaneously, making the surface defect detection process smoother and helping to improve the efficiency of continuous detection operations. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the support structure of the present invention; Figure 3 This is a schematic diagram of the position structure of the visual inspection camera of the present invention; Figure 4 This is a schematic diagram of the circular rod structure of the present invention; Figure 5 This is a schematic diagram of the structure of the irregularly shaped NdFeB workpiece after it has been placed. Figure 6 This is a schematic diagram of the internal structure of the mounting base of the present invention; Figure 7 This is a schematic diagram of a half-section of the assembly box of the present invention.

[0018] In the diagram: 1. Workbench; 2. Inspection host; 3. Placement platform; 4. Vertical plate; 5. Mounting bracket; 6. Linear electric cylinder; 7. Mounting plate; 8. Vision inspection camera; 9. Light shield; 10. Ring light; 11. Guide sleeve; 12. Round rod; 21. Mounting base; 22. Sliding block; 23. Spring; 24. Contact block; 25. Guide frame; 26. Linkage rod; 31. Assembly box; 32. Rectangular slider; 33. Connecting rod; 34. Linkage plate; 35. Lower pressure plate; 36. Insert rod; 37. Anti-slip pad. Detailed Implementation

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

[0020] Please see Figure 1 - Figure 7 One embodiment of the present invention is: a surface defect detection device for the production of neodymium iron boron (NdFeB) material, comprising a workbench 1, a detection host 2 disposed on the top of the workbench 1, a placement platform 3 fixedly mounted on the top of the workbench 1, an arc-shaped groove formed on the top of the placement platform 3 for placing irregularly shaped NdFeB workpieces, and further comprising: a vertical plate 4 fixedly mounted on the top of the workbench 1, a rectangular groove formed on the side of the vertical plate 4 near the placement platform 3; a mounting bracket 5 fixedly mounted on the top of the workbench 1; and a linear electric cylinder 6 fixedly mounted on the top of the mounting bracket 5, the output end of the linear electric cylinder 6 slidingly penetrating the mounting bracket 5. The support 5 has the following components: a mounting plate 7, which is fixedly mounted on the output end of a linear electric cylinder 6, which drives the mounting plate 7 to move vertically; a visual inspection camera 8, which is fixedly mounted at the bottom center of the mounting plate 7, and has a data transmission module inside, which transmits the inspection image to the inspection host 2; and a light shield 9, which is fixedly mounted at the bottom of the mounting plate 7, which isolates the interference of external natural light on the inspection field of view. The light shield 9, together with the vertical plate 4, forms a closed inspection space, which can effectively isolate the interference of natural light on the surface defect inspection.

[0021] A ring light 10 is fixedly installed at the bottom of the mounting plate 7. The ring light 10 is coaxially set with the vision inspection camera 8. The ring light 10 is used to provide uniform illumination to the irregular NdFeB workpiece on the placement stage 3. By setting the ring light 10 coaxially with the vision inspection camera 8, uniform lighting of the ring light 10 is achieved, so that the surface of the irregular NdFeB workpiece can clearly show the micron-level defect features.

[0022] The two sides of the light shield 9 match the rectangular groove size of the vertical plate 4, and the vertical height of the light shield 9 is the same as that of the vertical plate 4. By using the light shield 9 to block the two sides of the vertical plate 4, the external natural light is effectively blocked, providing a closed space for testing.

[0023] A guide sleeve 11 is fixedly inserted through the top of the mounting bracket 5, and a round rod 12 is fixedly installed on the top of the mounting plate 7. The round rod 12 fits against the inner wall of the guide sleeve 11. The combination of the guide sleeve 11 and the round rod 12 prevents the mounting plate 7 from tilting or swaying during displacement, so that the visual inspection camera 8 always maintains a vertical and facing posture with the placement stage 3.

[0024] In this embodiment, the irregularly shaped NdFeB workpiece to be inspected is placed on the placement stage 3 with its concave surface facing upwards. During placement, the curved surface of the irregularly shaped NdFeB workpiece is aligned with the arc groove of the placement stage 3. Then, the linear electric cylinder 6 is activated, and its output end drives the mounting plate 7 to move downwards. This causes the visual inspection camera 8, the light shield 9, and the ring light 10, which are fixed to the bottom of the mounting plate 7, to move downwards synchronously. At the same time, the mounting plate 7 also drives the round rod 12 to move downwards synchronously along the inner wall of the guide sleeve 11. During this process, the guide sleeve 11 provides precise guidance and constraint for the round rod 12, ensuring that the round rod 12 always maintains a vertical posture. This ensures that the visual inspection camera 8 is always aligned with the top of the placement stage 3, providing accuracy assurance for surface defect detection. Through the combination of the guide sleeve 11 and the round rod 12, the mounting plate 7 is prevented from tilting or swaying during displacement, ensuring that the visual inspection camera 8 always maintains a vertical and facing posture with the placement stage 3, thereby improving the defect recognition rate. As the mounting plate 7 continues to move downwards, the light-shielding plate 9, which moves downwards along with it, precisely aligns with the rectangular groove of the vertical plate 4. Subsequently, the edge of the light-shielding plate 9 moves smoothly downwards along the inner wall of the rectangular groove until the bottom of the light-shielding plate 9 is in contact with the worktable 1. At this point, the linear electric cylinder 6 stops driving. The light-shielding plate 9 and the vertical plate 4 work together to form a detection space free from natural light interference around the placement table 3. Then, the ring light lamp 10 is turned on to uniformly illuminate the concave surface of the irregular NdFeB workpiece. Next, the vision inspection camera 8 is activated to complete the image acquisition of the irregular NdFeB workpiece directly below. The acquired image data is transmitted to the inspection host 2. After analysis and processing by the inspection host 2, the inspection results are fed back to the electronic screen in real time for the inspection personnel to view the results. The combination of the light-shielding plate 9 and the vertical plate 4 to form a closed inspection space isolates the interference of natural light. Combined with the uniform illumination of the ring light lamp 10, the surface of the irregular NdFeB workpiece can clearly show the micron-level defect characteristics, reducing the rate of missed detections and false detections.

[0025] Please see Figure 1 - Figure 7In another embodiment of the present invention, based on the above embodiments, the vertical plate 4 is provided with an auxiliary device for improving the lifting stability of the light shield 9, and the vertical plate 4 is also provided with a clamping device for positioning irregularly shaped NdFeB workpieces; the auxiliary device includes a mounting base 21, a sliding block 22, a spring 23 and a contact block 24. The mounting base 21 is fixedly inserted through the inner wall of the vertical plate 4, the sliding block 22 is slidably installed on the inner wall of the mounting base 21, the spring 23 is disposed between the mounting base 21 and the sliding block 22, and the contact block 24 is fixedly installed on the top of the sliding block 22. The contact block 24 slides through the top of the mounting base 21. Through the elastic reaction force of the spring 23, the contact block 24 presses against the surface of the light shield 9, ensuring the sealing and fitting effect between the light shield 9 and the vertical plate 4 and the mounting base 21, effectively isolating external natural light.

[0026] A guide frame 25 is fixedly inserted through the outer wall of the mounting base 21. The guide frame 25 is fixedly inserted through the outer wall of the vertical plate 4. A linkage rod 26 is fixedly installed on the side of the sliding block 22 near the guide frame 25. The linkage rod 26 fits against the inner wall of the guide frame 25 and is restored by the extension of the spring 23. It provides auxiliary thrust for the light shield 9 in the initial stage of resetting, which reduces the load pressure of the linear electric cylinder 6 and ensures the smoothness of the resetting process of the light shield 9.

[0027] The clamping device includes an assembly box 31, a rectangular slider 32, a connecting rod 33, a linkage plate 34, and a lower pressure plate 35. The assembly box 31 is fixedly mounted on the surface of the vertical plate 4. The rectangular slider 32 is slidably mounted on the inner wall of the assembly box 31. The connecting rod 33 is fixedly mounted on the surface of the rectangular slider 32. The linkage plate 34 is fixedly mounted on the end of the connecting rod 33 away from the placement platform 3. The linkage plate 34 is fixedly connected to the circumferential surface of the linkage rod 26. The lower pressure plate 35 is fixedly mounted on the other end of the connecting rod 33. When the light shield 9 moves down, it completes the clamping and fixing of the irregular NdFeB workpiece, ensuring that the irregular NdFeB workpiece always maintains a stable posture when the vision inspection camera 8 performs image acquisition.

[0028] A rod 36 is fixedly inserted through the bottom of the lower pressure plate 35. An anti-slip pad 37 is fixedly installed at the bottom end of the rod 36. During the process of the light shield 9 moving up and resetting, the pressing and fixing of the irregular neodymium iron boron workpiece is released simultaneously, making the surface defect detection process smoother and helping to improve the efficiency of continuous detection operations.

[0029] In this embodiment, as the light-shielding plate 9 moves downward along the inner wall of the rectangular groove, its surface contacts the top of the contact block 24 and applies downward pressure, driving the contact block 24 to move downward synchronously. The contact block 24 drives the sliding block 22 to move downward synchronously, and the sliding block 22 then drives the linkage rod 26 to move downward and axially compress the spring 23. The compressed spring 23 generates an upward elastic reaction force, which is transmitted to the surface of the light-shielding plate 9 through the sliding block 22 and the contact block 24. When the light-shielding plate 9 is in contact with the top of the mounting base 21, the deformed spring 23 tends to stabilize, and the elastic reaction force it applies remains constant during the detection process. Through the elastic reaction force of the spring 23, the contact block 24 is pressed against the surface of the light-shielding plate 9, ensuring the sealing and fitting effect between the light-shielding plate 9, the vertical plate 4, and the mounting base 21, effectively isolating external natural light. After the test is completed, the linear electric cylinder 6 drives the mounting plate 7 to reset upwards. The downward pressure of the light shield 9 on the contact block 24 gradually decreases as the mounting plate 7 moves upwards synchronously. The spring 23, which is deformed by pressure, extends upwards and recovers under the action of elastic restoring force, which drives the sliding block 22 to move upwards. The sliding block 22 then drives the contact block 24 and the linkage rod 26 to move upwards synchronously. During this process, the contact block 24 applies an upward auxiliary thrust to the bottom of the light shield 9 until the light shield 9 completely disengages from the contact block 24. Through the extension and recovery of the spring 23, an auxiliary thrust is provided for the light shield 9 in the initial stage of reset, which reduces the load pressure on the linear electric cylinder 6 and ensures the smoothness of the reset process of the light shield 9. When the linkage rod 26 moves down synchronously with the sliding block 22, it drives the linkage plate 34 fixed thereto to move down synchronously. The linkage plate 34 further drives the connecting rod 33 and the rectangular slider 32 to move down synchronously. The connecting rod 33 then drives the lower pressure plate 35 to move down. The lower pressure plate 35 drives the anti-slip pad 37 to move down synchronously through the insertion rod 36. During the downward movement, the anti-slip pad 37 first contacts the top of the irregular NdFeB workpiece. As the linkage rod 26 continues to move down, until the light shield 9 is in contact with the top of the mounting base 21, the continuously moving lower pressure plate 35 applies a stable downward pressure to the irregular NdFeB workpiece through the anti-slip pad 37, temporarily pressing and fixing the irregular NdFeB workpiece on the arc groove of the placement stage 3 to cooperate with the visual inspection camera 8 for inspection. The pressing and fixing of the irregular NdFeB workpiece is completed when the light shield 9 moves down, ensuring that the irregular NdFeB workpiece always maintains a stable posture when the visual inspection camera 8 is acquiring images, thereby improving the accuracy of the inspection results. When the linkage rod 26 moves upward synchronously with the sliding block 22, it drives the linkage plate 34 to move upward synchronously. The linkage plate 34 further drives the connecting rod 33 and the lower pressure plate 35 to move upward synchronously. The lower pressure plate 35 then drives the anti-slip pad 37 to move upward synchronously through the insertion rod 36. During this process, the downward pressure of the anti-slip pad 37 on the irregular NdFeB workpiece gradually decreases until it completely disengages from the irregular NdFeB workpiece, automatically releasing the clamping and fixing of the irregular NdFeB workpiece. After the light shield 9 moves upward to the specified height and completely separates from the rectangular groove, the inspection personnel can directly pick up and put down the inspected irregular NdFeB workpiece. By releasing the clamping and fixing of the irregular NdFeB workpiece synchronously during the upward resetting process of the light shield 9, the surface defect inspection process is more smoothly connected, which helps to improve the efficiency of continuous inspection operations.

[0030] Although embodiments of the invention 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 the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A surface defect detection device for the production of neodymium iron boron (NdFeB) material, comprising a workbench (1), characterized in that, The top of the workbench (1) is provided with a detection host (2), and a placement platform (3) is fixedly installed on the top of the workbench (1). The top of the placement platform (3) is provided with an arc-shaped groove. The placement platform (3) is used to place irregularly shaped NdFeB workpieces, and also includes: Vertical plate (4), the vertical plate (4) is fixedly installed on the top of the workbench (1), and a rectangular groove is provided on the side of the vertical plate (4) near the placement table (3); A mounting bracket (5) is fixedly installed on the top of the workbench (1); A linear electric cylinder (6) is fixedly mounted on the top of the mounting bracket (5), and the output end of the linear electric cylinder (6) slides through the surface of the mounting bracket (5). Mounting plate (7), which is fixedly mounted on the output end of linear electric cylinder (6), which is used to drive mounting plate (7) to rise and fall in the vertical direction; A visual inspection camera (8) is fixedly installed at the bottom center of the mounting plate (7). The visual inspection camera (8) is equipped with a data transmission module, which is used to transmit the inspection image to the inspection host (2). A light shield (9) is fixedly installed at the bottom of the mounting plate (7). The light shield (9) is used to isolate the interference of external natural light on the detection field of view. The top of the mounting bracket (5) is fixedly connected to a guide sleeve (11), and the top of the mounting plate (7) is fixedly installed with a round rod (12), which is in contact with the inner wall of the guide sleeve (11). Among them, the vertical plate (4) is provided with an auxiliary device for improving the lifting stability of the light shield (9), and the vertical plate (4) is also provided with a clamping device for positioning irregular neodymium iron boron workpieces. The auxiliary device includes a mounting base (21), a sliding block (22), a spring (23), and a contact block (24). The mounting base (21) is fixedly inserted through the inner wall of the vertical plate (4). The sliding block (22) is slidably installed on the inner wall of the mounting base (21). The spring (23) is disposed between the mounting base (21) and the sliding block (22). The contact block (24) is fixedly installed on the top of the sliding block (22) and slides through the top of the mounting base (21). The outer wall of the mounting base (21) is fixedly connected to the guide frame (25), the guide frame (25) is fixedly connected to the outer wall of the vertical plate (4), and the sliding block (22) is fixedly connected to the side of the guide frame (25) with a linkage rod (26), the linkage rod (26) is in contact with the inner wall of the guide frame (25).

2. The surface defect detection device for the production of neodymium iron boron as described in claim 1, characterized in that: A ring light (10) is fixedly installed at the bottom of the mounting plate (7). The ring light (10) is coaxially arranged with the visual inspection camera (8). The ring light (10) is used to provide uniform illumination to the irregular neodymium iron boron workpiece on the placement platform (3).

3. The surface defect detection device for the production of neodymium iron boron as described in claim 2, characterized in that: The two sides of the light-shielding plate (9) match the size of the rectangular groove of the vertical plate (4), and the vertical height of the light-shielding plate (9) is consistent with the vertical height of the vertical plate (4).

4. The surface defect detection device for the production of neodymium iron boron as described in claim 3, characterized in that: The clamping device includes an assembly box (31), a rectangular slider (32), a connecting rod (33), a linkage plate (34), and a lower pressure plate (35). The assembly box (31) is fixedly inserted through the surface of the vertical plate (4). The rectangular slider (32) is slidably installed on the inner wall of the assembly box (31). The connecting rod (33) is fixedly inserted through the surface of the rectangular slider (32). The linkage plate (34) is fixedly installed at one end of the connecting rod (33) away from the placement platform (3). The linkage plate (34) is fixedly connected to the circumferential surface of the linkage rod (26). The lower pressure plate (35) is fixedly installed at the other end of the connecting rod (33).

5. The surface defect detection device for the production of neodymium iron boron as described in claim 4, characterized in that: A rod (36) is fixedly inserted through the bottom of the lower pressure plate (35), and an anti-slip pad (37) is fixedly installed at the bottom end of the rod (36).

Images