Magnetic detection device for magnet production

Abstract

The application discloses a magnet production magnetic detection device and belongs to the technical field of magnet detection, which comprises a conveyor and a workboard. The upper surface of the conveyor is bolted with a hydraulic rod through a connecting plate, and the output end of the hydraulic rod is fixedly connected with a bottom plate. In addition, the lower surface of the bottom plate is fixedly connected with a long pin. The inside of the workboard is provided with a conveyor belt, and the inner wall of the workboard is fixedly connected with an inner plate. In addition, the inner wall of the workboard is also fixedly connected with an inner connecting plate. The magnet production magnetic detection device, when working, the conveyor transports magnet elements, and the hydraulic rod, the bottom plate and the distribution plate complete the distribution of the magnet. The magnet enters the conveyor belt through the distribution plate and is detected by the Hall probe. Then the magnet is turned over by the reversing plate, and the Hall probe in the rear area can detect the other side of the magnet. In addition, the air bag and the air blowing pipe are arranged, which can clean dust and impurities before detection, so that the dust does not affect the detection, and the detection accuracy is improved.

Description

Technical Field

[0001] This invention relates to the field of magnet testing technology, specifically to a magnetic testing device for magnet production. Background Technology

[0002] Magnets can convert electrical energy into mechanical energy and vice versa, generating a fixed magnetic field to achieve functions such as adsorption, positioning, driving, and detection. They are widely used in motors, sensors, medical devices, automated equipment, and electronic devices, serving as key fundamental components for energy conversion and automated control. During magnet production, magnetic properties need to be tested to quickly determine if the magnet's performance meets standards and to screen for defective products such as those with weak or missing magnetism. This necessitates the use of magnetic detection devices, a specific application of intelligent monitoring devices. These devices achieve automatic detection of magnetic properties through sensing, control, and discrimination technologies, and are a typical example of intelligent devices used for quality monitoring in industrial production. Monitoring equipment, such as Chinese invention patent application number 202010719620.6, filed on July 23, 2020, discloses a device for detecting the uniformity of magnetic properties of neodymium iron boron magnets. During operation, the neodymium iron boron magnets are fixed by a support mechanism, and a detection mechanism located above the support mechanism can detect the magnetism of the neodymium iron boron magnets. Multiple iron blocks are arranged in the detection mechanism, allowing for multi-point detection of the neodymium iron boron magnets, thereby effectively improving the accuracy of the overall magnetic detection and effectively detecting the uniformity of the magnetic distribution. Another example is application number 20201... Chinese invention patent application No. 0347031.X, filed on April 28, 2020, discloses a magnet magnetic detection machine. During operation, after a magnetizer magnetizes a magnetic material, multiple magnets are inserted into multiple limiting holes. A cover plate presses against the limiting plate, thus sealing the magnets within the limiting holes. The mechanism then activates, utilizing multiple magnetic detection units to simultaneously detect multiple magnets, improving the efficiency of magnet magnetic detection. Also disclosed is Chinese utility model patent application No. 202422490454.3, filed on October 15, 2024, which discloses a magnetic detection mechanism for motor magnets. The detection device, through the coordinated use of a first and second cylinder, allows for easy adjustment of the dual-axis cylinder's position, enabling rapid positioning and removal of defective motors and improving detection efficiency. The inclusion of guide rails and reinforcing ribs ensures the device's stability and durability, reducing maintenance costs. The use of buffer plates and sliding rods protects the motor from damage during movement, enhancing its protection. V-grooves enhance the stability and safety of motor clamping. The use of nylon rollers ensures smooth motor movement, reduces noise, and improves the working environment. In the magnet manufacturing process, when producing special multi-level magnetized magnets and checking whether the magnetic pole distribution and position are correct, double-sided inspection of the magnets is required. However, the device in the above application does not have an efficient double-sided inspection mechanism, which leads to inaccurate inspection results. It is easy to miss unqualified products such as uneven magnetization and differences in magnetic properties between the front and back sides, resulting in misjudgments that flow into subsequent processes, reducing product quality and reliability. Summary of the Invention

[0003] The purpose of this invention is to provide a magnetic testing device for magnet production, in order to solve the problems mentioned in the background art, which lack an efficient double-sided testing mechanism, leading to inaccurate testing results, easy omission of unqualified products such as uneven magnetization and differences in magnetic properties between the front and back sides, resulting in misjudgments that flow into subsequent processes, reducing product quality and reliability.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a magnetic detection device for magnet production, comprising a conveyor and a working plate. A hydraulic rod is bolted to the upper surface of the conveyor via a connecting plate, and the output end of the hydraulic rod is fixedly connected to a base plate. Furthermore, a long pin is fixedly connected to the lower surface of the base plate. A conveyor belt is installed inside the working plate, and an inner plate is fixedly connected to the inner wall of the working plate. An inner connecting plate is also fixedly connected to the inner wall of the working plate, and a Hall effect sensor is installed on the working plate. A feeding plate is installed at the lower end of the conveyor via a reciprocating assembly, and force-bearing rods are fixedly connected to both sides of the feeding plate. A vertical plate is fixedly connected to the upper surface of the inner connecting plate, and a reversing plate is connected to the vertical plate via a reversing assembly. The reversing plate flips the workpiece, and a pushing block is movably installed inside the reversing plate. Both sides of the working plate are protruding, and air bladders are bonded to the protruding positions of the working plate. An air blowing pipe is installed on the upper surface of the air bladder.

[0005] Preferably, the reciprocating assembly includes a limiting plate fixedly connected to the lower surface of the conveyor, and a feeding plate is slidably disposed on the surface of the limiting plate, and the lower surface of the feeding plate is inclined, and a distributing plate is fixedly connected to the lower surface of the base plate.

[0006] Preferably, an auxiliary block is fixedly connected to the surface of the long pin, and the auxiliary blocks are evenly distributed on the surface of the long pin. In addition, the surface of the auxiliary block is arc-shaped.

[0007] Preferably, both sides of the limiting plate are protruding, and a first spring is fixedly connected to the inner wall of the limiting plate, and the other side of the first spring is fixedly connected to the surface of the feeding plate.

[0008] Preferably, the long pin has toothed blocks evenly spaced on its side, the reversing assembly includes a connecting shaft rotatably disposed inside the inner plate, and a first gear is fixedly connected to the surface of the connecting shaft. In addition, a limit rod is fixedly connected between the inner plate and the inner connecting plate.

[0009] Preferably, a movable plate is slidably provided on the surface of the limiting rod, and the movable plate is threadedly connected to the connecting shaft. A rack is fixedly connected to the side of the movable plate, and a rotating shaft is rotatably provided inside the vertical plate. The two ends of the rotating shaft are fixedly connected to a second gear, and the vertical plate is provided with an inner shaft for rotation, and the inner shaft is connected to the rotating shaft through a pulley.

[0010] Preferably, a push block is fixedly connected to the right side of the vertical plate, and the surface of the push block is arc-shaped. A sliding groove is provided inside the reversing plate, and a long rod is movably arranged inside the sliding groove. In addition, a movable rod is fixedly connected to the side of the long rod.

[0011] Preferably, the movable rod is connected to the reversing plate by a second spring, and a push block is fixedly connected to the surface of the long rod. In addition, the push block is initially located inside the slide groove.

[0012] Preferably, a compression plate is fixedly connected to the side of the movable plate, and the surface of the compression plate is in contact with the surface of the airbag, and an air inlet pipe is fixedly connected to the lower surface of the airbag.

[0013] Preferably, an upper connecting plate is fixedly connected to the upper surface of the working plate. In addition, one-way valves are provided on the surface of the air inlet pipe and the surface of the air blowing pipe. The air blowing pipe is located inside the upper connecting plate, and air blowing ports are provided at equal intervals on the lower surface of the air blowing pipe.

[0014] Compared with the prior art, the beneficial effects of this invention are as follows: Adopting a novel structural design, during operation, the magnet components are transported via a conveyor, and the magnets are separated by a hydraulic rod, a base plate, and a distribution plate. The magnets then enter the conveyor belt via a discharge plate and are detected by a Hall effect sensor. Afterward, the magnets are flipped by a reversing plate, allowing the Hall effect sensor in the rear area to detect the other side of the magnet. Additionally, an airbag and air blowing pipe are included to clean dust and impurities before detection, preventing dust from affecting the accuracy of the detection. The specific details are as follows: (1) When the magnetic detection device for magnet production is working, the conveyor transports the magnets that are attached together to the material distribution plate position. At this time, the hydraulic rod drives the bottom plate and the material distribution plate to descend, pushing the magnet at the end to descend. The magnet moves to the conveyor belt through the material unloading plate. The material unloading plate moves back and forth in the horizontal direction when working, which plays an auxiliary role in unloading and makes the detection work smoother. Then the hydraulic rod can rise.

[0015] (2) In the magnetic detection device for magnet production, the magnet moves on the conveyor belt during the detection process. Eventually, the magnet enters the interior of the reversing plate. At this time, the hydraulic rod descends again to push the next magnet out of the conveyor. During this process, the connecting shaft rotates under the action of the toothed block and the first gear. Then, the movable plate drives the rotating shaft to rotate through the rack and the second gear. Then, the rotating shaft drives the inner shaft to rotate once through the pulley. When the inner shaft rotates, the reversing plate flips the magnet. After the magnet flips, it contacts the conveyor belt again. The conveyor belt carries the magnet out of the reversing plate. At this time, the hydraulic rod rises, and then the rotating shaft and the inner shaft rotate back, which facilitates the next use of the reversing plate. Through the efficient linkage structure, the hydraulic rod drives the reciprocating component and the reversing component to work at the same time, thereby realizing the functions of rapid unloading and rapid reversing of the previous workpiece.

[0016] Furthermore, during the rotation of the reversing plate, the long rod inside the reversing plate is pushed by the push block. At this time, the long rod, the movable rod, and the push block move to the outside of the slide. The push block plays the role of assisting in pushing the magnet out of the reversing plate, which improves the flow of detection. The cooperation between the conveyor belt and the reversing assembly allows the workpiece to enter the interior of the reversing plate smoothly. The workflow of the workpiece before and after is not affected, and the smoothness is high.

[0017] Furthermore, after the magnet flips, it is detected again by the Hall probe in the rear area as the conveyor belt moves, improving the accuracy of the detection. It can accurately detect special multi-stage magnetized magnets as well as the distribution and position of magnetic poles, thus improving work efficiency.

[0018] (3) The magnetic detection device for magnet production will drive the extrusion plate to move synchronously during the movement of the movable plate. The extrusion plate will intermittently extrude air through the air pipe and air outlet, which will clean the dust before detection and improve the accuracy of detection. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the connection structure between the conveyor and the hydraulic rod of the present invention; Figure 2 This is a schematic diagram of the connection structure between the working plate and the airbag of the present invention; Figure 3 This is a schematic diagram of the connection structure between the inner plate and the working plate of the present invention; Figure 4 This is a schematic diagram of the auxiliary block distribution state structure of the present invention; Figure 5 This is a schematic diagram of the connection structure between the inner plate and the connecting shaft of the present invention; Figure 6 This is a schematic diagram of the connection structure between the rotating shaft and the second gear of the present invention; Figure 7 This is a schematic diagram of the connection structure between the vertical plate and the inner shaft of the present invention; Figure 8 This is a schematic diagram of the connection structure between the vertical plate and the rotating shaft of the present invention; Figure 9 For the present invention Figure 8 A magnified structural diagram of section A; Figure 10 This is a schematic diagram of the connection structure between the movable rod and the second spring of the present invention; Figure 11 This is a schematic diagram of the connection structure between the extrusion plate and the airbag of the present invention.

[0020] In the diagram: 1. Conveyor; 2. Hydraulic rod; 3. Base plate; 4. Working plate; 5. Limiting plate; 6. First spring; 7. Feeding plate; 8. Force rod; 9. Long pin; 10. Inner plate; 11. Auxiliary block; 12. Connecting shaft; 13. First gear; 14. Limiting rod; 15. Movable plate; 16. Rack; 17. Inner connecting plate; 18. Vertical plate; 19. Rotating shaft; 20. Second gear; 21. Reversing plate; 22. Inner shaft; 23. Push block; 24. Movable rod; 25. Long rod; 26. Slide groove; 27. Pushing block; 28. Upper connecting plate; 29. ​​Airbag; 30. Extrusion plate; 31. Second spring. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-11 The present invention provides the following technical solution: a magnetic detection device for magnet production.

[0023] Example 1: By using a reciprocating assembly, the feed plate 7 moves horizontally, allowing the magnet to move more smoothly onto the conveyor belt. Figures 1-4 As shown, it includes a conveyor 1 and a working plate 4. The upper surface of the conveyor 1 is connected to a hydraulic rod 2 by a connecting plate bolt, and the output end of the hydraulic rod 2 is fixedly connected to a base plate 3. In addition, a long pin 9 is fixedly connected to the lower surface of the base plate 3. The working plate 4 is equipped with a conveyor belt inside, and an inner plate 10 is fixedly connected to the inner wall of the working plate 4. In addition, an inner connecting plate 17 is fixedly connected to the inner wall of the working plate 4, and a Hall probe is provided on the working plate 4. The feeding plate 7 is set at the lower end of the conveyor 1 through a reciprocating assembly, and force rods 8 are fixedly connected to both sides of the feeding plate 7. The reciprocating assembly includes a limiting plate 5 fixedly connected to the lower surface of the conveyor 1, and the feeding plate 7 is slidably arranged on the surface of the limiting plate 5. The lower surface of the feeding plate 7 is inclined, and a material distribution plate is fixedly connected to the lower surface of the bottom plate 3.

[0024] An auxiliary block 11 is fixedly connected to the surface of the long pin 9, and the auxiliary blocks 11 are evenly distributed on the surface of the long pin 9. In addition, the surface of the auxiliary block 11 is arc-shaped, both sides of the limiting plate 5 are protruding, and a first spring 6 is fixedly connected to the inner wall of the limiting plate 5, and the other side of the first spring 6 is fixedly connected to the surface of the feeding plate 7.

[0025] During operation, conveyor 1 transports the magnets that are pressed together to the distribution plate position. At this time, hydraulic rod 2 drives the base plate 3 and the distribution plate to descend, pushing the last magnet down. The magnet moves onto the conveyor belt through the unloading plate 7. During this process, long pin 9 descends synchronously. At this time, the auxiliary block 11 on the surface of long pin 9 will intermittently push the force rod 8. When the force rod 8 is pushed, the unloading plate 7 slides on the surface of the limiting plate 5, at which time the first spring 6 is compressed. When the force rod 8 is not pushed, the force rod 8 and the unloading plate 7 return to their original positions under the action of the first spring 6. The above process is repeated, and the unloading plate 7 is in operation. The hydraulic rod moves back and forth horizontally, which helps with material feeding and makes the inspection process smoother. Then, the hydraulic rod 2 rises. When the magnet moves on the conveyor belt, it stops after it reaches the lower end of the Hall probe, and the Hall probe completes the inspection. In addition, during the workpiece conveying process, a correction component is set under the upper plate 28. When the correction component is working, it can adjust the posture of the workpiece in real time by pushing and straightening it with the electric telescopic rod, so that it can enter the interior of the reversing plate 21 smoothly. This ensures that the workpiece is conveyed normally without deviation and that the workpiece is inspected smoothly.

[0026] Example 2: Unlike Example 1, the commutation assembly allows the commutation plate 21 to reverse the direction of the magnet, enabling detection on the other side of the magnet. Figures 5-8 As shown, the vertical plate 18 is fixedly connected to the upper surface of the inner plate 17, and the vertical plate 18 is connected to the reversing plate 21 through the reversing assembly. The reversing plate 21 flips the workpiece. The side of the long pin 9 is provided with toothed blocks at equal intervals. The reversing assembly includes a connecting shaft 12 rotatably disposed inside the inner plate 10, and a first gear 13 is fixedly connected to the surface of the connecting shaft 12. In addition, a limit rod 14 is fixedly connected between the inner plate 10 and the inner plate 17.

[0027] A movable plate 15 is slidably provided on the surface of the limiting rod 14, and the movable plate 15 is threadedly connected to the connecting shaft 12. A rack 16 is fixedly connected to the side of the movable plate 15. A rotating shaft 19 is rotatably provided inside the vertical plate 18. A second gear 20 is fixedly connected to both ends of the rotating shaft 19. An inner shaft 22 is rotatably provided inside the vertical plate 18, and the inner shaft 22 is connected to the rotating shaft 19 through a pulley.

[0028] After the magnet is detected on one side, the conveyor belt starts again, and the magnet moves into the reversing plate 21. At this time, the hydraulic rod 2 descends again. During this process, the toothed block on the surface of the long pin 9 engages with the first gear 13, causing the connecting shaft 12 to rotate inside the inner plate 10. At this time, the connecting shaft 12 engages with the limit rod 14, causing the movable plate 15 to drive the rack 16 to move horizontally. When the rack 16 moves, it engages with the second gear 20, causing the rotating shaft 19 to rotate. At this time, the rotating shaft 19 drives the inner shaft 22, the reversing plate 21, and the magnet to flip through the pulley. After the magnet flips, it contacts the conveyor belt again, and the conveyor belt carries the magnet out of the reversing plate 21. At this time, the hydraulic rod 2 rises, and the connecting shaft 12 rotates back. At this time, the movable plate 15 moves back, and the rotating shaft 19 and the inner shaft 22 rotate back, that is, the reversing plate 21 returns to its original position, which is convenient for the next use of the reversing plate 21.

[0029] Example 3: Unlike Example 2, the push block 27 assists in pushing the magnet, allowing it to move more smoothly out of the reversing plate 21. Figures 8-10 As shown, a push block 27 is movably disposed inside the reversing plate 21, and a push block 23 is fixedly connected to the right side of the vertical plate 18. The surface of the push block 23 is arc-shaped. A slide groove 26 is opened inside the reversing plate 21, and a long rod 25 is movably disposed inside the slide groove 26. In addition, a movable rod 24 is fixedly connected to the side of the long rod 25. The movable rod 24 is connected to the reversing plate 21 through a second spring 31, and the push block 27 is fixedly connected to the surface of the long rod 25. Furthermore, the push block 27 is initially located inside the slide groove 26.

[0030] During the rotation of the reversing plate 21, the long rod 25 inside the reversing plate 21 is pushed by the push block 23 on the right side of the vertical plate 18. At this time, the long rod 25, the movable rod 24, and the push block 27 move to the outside of the chute 26. The push block 27 plays the role of assisting in pushing the magnet out of the reversing plate 21. In coordination with the conveyor belt, it actively and smoothly pushes the magnet workpiece out of the outside of the reversing plate 21, ensuring that the workpiece accurately enters the next conveying link. This avoids problems such as jamming and inaccurate positioning caused by the inertia of flipping and posture deviation, ensuring that the conveying process is continuous and smooth after flipping, improving the stability of the device operation and the accuracy of detection and positioning, ensuring the efficient and reliable operation of the automated production line, and improving the flow of detection. At the same time, after the magnet flips, it is detected again by the Hall probe in the rear area as the conveyor belt moves, improving the accuracy of detection. When the movable rod 24 moves, it will stretch the second spring 31. When the reversing plate 21 returns to its original position, the long rod 25, the movable rod 24, and the push block 27 move to the inside of the chute 26 under the action of the second spring 31, making it convenient for the push block 27 to be used again.

[0031] Example 4: Unlike Example 3, the airbag 29 and air tube are designed to assist in air cleaning, such as... Figure 11 As shown, both sides of the working plate 4 are raised, and an airbag 29 is bonded to the raised part of the working plate 4. An air blowing pipe is provided on the upper surface of the airbag 29. A compression plate 30 is fixedly connected to the side of the movable plate 15, and the surface of the compression plate 30 is in contact with the surface of the airbag 29. An air inlet pipe is fixedly connected to the lower surface of the airbag 29. An upper connecting plate 28 is fixedly connected to the upper surface of the working plate 4. In addition, a one-way valve is provided on the surface of the air inlet pipe and the surface of the air blowing pipe. The air blowing pipe is located inside the upper connecting plate 28. At the same time, air blowing ports are provided at equal intervals on the lower surface of the air blowing pipe.

[0032] During the movement of the movable plate 15, the squeezing plate 30 moves synchronously, and the squeezing plate 30 intermittently squeezes the airbag 29. When the airbag 29 is squeezed, the airbag 29 expels air through the air blowing pipe and the air blowing port. When the airbag 29 is not squeezed, the airbag 29 inhales air through the air inlet pipe. That is, the airbag 29 intermittently expels air through the air blowing pipe and the air blowing port, which plays a role in cleaning dust before detection and improving the accuracy of detection. The one-way valve makes the airflow direction from the air inlet pipe to the air blowing pipe, and the airflow backflow will not occur.

[0033] The above is the entire working process of the device, and all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A magnetic detection device for magnet production, comprising a conveyor (1) and a working plate (4), wherein a hydraulic rod (2) is bolted to the upper surface of the conveyor (1) via a connecting plate, and a base plate (3) is fixedly connected to the output end of the hydraulic rod (2), and a long pin (9) is fixedly connected to the lower surface of the base plate (3). The working plate (4) is equipped with a conveyor belt inside, and an inner plate (10) is fixedly connected to the inner wall of the working plate (4). In addition, an inner connecting plate (17) is fixedly connected to the inner wall of the working plate (4), and a Hall probe is provided on the working plate (4). Its features are: The feeding plate (7) is set at the lower end of the conveyor (1) by a reciprocating assembly, and the feeding plate (7) is fixedly connected to the force rod (8) on both sides. A vertical plate (18) is fixedly connected to the upper surface of the inner plate (17), and the vertical plate (18) is connected to a reversing plate (21) through a reversing assembly. The reversing plate (21) flips the workpiece, and a push block (27) is movably arranged inside the reversing plate (21). Both sides of the working plate (4) are raised, and an air bag (29) is bonded to the raised part of the working plate (4), and an air blowing pipe is provided on the upper surface of the air bag (29).

2. The magnetic detection device for magnet production according to claim 1, characterized in that: The reciprocating assembly includes a limiting plate (5) fixedly connected to the lower surface of the conveyor (1), and a feeding plate (7) is slidably provided on the surface of the limiting plate (5), and the lower surface of the feeding plate (7) is inclined. A dividing plate is fixedly connected to the lower surface of the base plate (3).

3. The magnetic detection device for magnet production according to claim 1, characterized in that: An auxiliary block (11) is fixedly connected to the surface of the long pin (9), and the auxiliary blocks (11) are evenly distributed on the surface of the long pin (9). In addition, the surface of the auxiliary block (11) is arc-shaped.

4. A magnetic detection device for magnet production according to claim 2, characterized in that: Both sides of the limiting plate (5) are protruding, and a first spring (6) is fixedly connected to the inner wall of the limiting plate (5), and the other side of the first spring (6) is fixedly connected to the surface of the feeding plate (7).

5. A magnetic detection device for magnet production according to claim 1, characterized in that: The long pin (9) has toothed blocks evenly spaced on its side. The reversing assembly includes a connecting shaft (12) rotatably disposed inside the inner plate (10), and a first gear (13) is fixedly connected to the surface of the connecting shaft (12). In addition, a limit rod (14) is fixedly connected between the inner plate (10) and the inner connecting plate (17).

6. A magnetic detection device for magnet production according to claim 5, characterized in that: The surface of the limiting rod (14) is slidably provided with a movable plate (15), and the movable plate (15) is threadedly connected to the connecting shaft (12). A rack (16) is fixedly connected to the side of the movable plate (15), and a rotating shaft (19) is rotatably provided inside the vertical plate (18). The two ends of the rotating shaft (19) are fixedly connected to the second gear (20), and the vertical plate (18) is provided with an inner shaft (22) for rotation, and the inner shaft (22) is connected to the rotating shaft (19) through a pulley.

7. A magnetic detection device for magnet production according to claim 1, characterized in that: A push block (23) is fixedly connected to the right side of the vertical plate (18), and the surface of the push block (23) is arc-shaped. A sliding groove (26) is provided inside the reversing plate (21), and a long rod (25) is movably arranged inside the sliding groove (26). In addition, a movable rod (24) is fixedly connected to the side of the long rod (25).

8. A magnetic detection device for magnet production according to claim 7, characterized in that: The movable rod (24) is connected to the reversing plate (21) by a second spring (31), and a push block (27) is fixedly connected to the surface of the long rod (25). In addition, the push block (27) is initially located inside the slide groove (26).

9. A magnetic detection device for magnet production according to claim 6, characterized in that: The side of the movable plate (15) is fixedly connected to a compression plate (30), and the surface of the compression plate (30) is in contact with the surface of the airbag (29), and the lower surface of the airbag (29) is fixedly connected to an air inlet pipe.

10. A magnetic detection device for magnet production according to claim 9, characterized in that: The upper surface of the working plate (4) is fixedly connected to an upper connecting plate (28). In addition, one-way valves are provided on the surface of the air inlet pipe and the surface of the air blowing pipe. The air blowing pipe is located inside the upper connecting plate (28), and air blowing ports are provided at equal intervals on the lower surface of the air blowing pipe.

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