A detection device for an annular permanent magnet

Abstract

The present invention discloses a detection device for an annular permanent magnet, which includes an end face detection device, an alignment module, a grasping and transferring device, a curved surface detection module, and a good product queue module that are sequentially arranged along the moving position of the annular permanent magnet. The curved surface detection module includes a rotating device, a curved surface detection device, and an identification system. The present invention can automatically detect whether there are appearance defects on the front and back end faces and the curved surface of the annular permanent magnet; under the transmission power of the feeding mechanism, the annular permanent magnet moves in a semi-reclined manner, which is beneficial to the detection of defects on the front and back end faces. The turning action is realized by means of a guiding plate, and the structure is simple; for the curved surface detection of the annular permanent magnet, a rotating device is adopted. By stacking multiple annular permanent magnets along the axis direction of the rotating device and performing a single rotation action, the automatic detection of the curved surface defects of multiple annular permanent magnets can be realized at one time, and the detection efficiency is significantly improved; after the detection process is completed, the annular permanent magnets without detected defects can be neatly arranged along the central axis direction of the permanent magnet, which is beneficial to subsequent box loading.

Description

Technical Field

[0001] The present invention relates to the field of magnet steel detection, and particularly to a detection device for an annular magnet steel. Background Art

[0002] With the rapid development of intelligent manufacturing technology, traditional labor-intensive manufacturing industries have been severely impacted. The reasons are that the labor cost is getting higher and higher, the use of a large number of workers will cause management difficulties, and the harsh production and manufacturing environment is likely to have an impact on human health, etc. Especially for highly repetitive and high-intensity manual visual inspection work, it is increasingly replaced by machines. In the field of magnetic material detection, the detection of appearance defects of flat annular magnet steel small parts involves the detection of the front and back end faces and the curved surface, with complex operations. The efficiency of manual visual inspection is low, which will consume a lot of time, and it is difficult to improve the production capacity. Moreover, after a long time of mechanical work, workers are prone to visual fatigue and missed inspection situations, and the quality of manual visual inspection cannot be guaranteed, which will ultimately lead to customer complaints.

[0003] Automation devices that can detect whether there are defects on the front and back end faces and the curved surface of an annular magnet steel are disclosed in the prior art. However, to automatically detect the curved surface defects of an annular magnet steel, it is necessary to image the curved surface through multiple cameras, generally 4 to 6 cameras, with high usage costs but low efficiency. Summary of the Invention

[0004] The present invention provides a detection device for an annular magnet steel to solve the problem of low efficiency in automatically detecting the curved surface defects of an annular magnet steel in the prior art.

[0005] The technical solution adopted by the present invention is: The present invention proposes a detection device for an annular magnet steel, including: a rotating device for rotating an annular magnet steel group with the centers on the same axis by at least 360°; a curved surface detection device for acquiring the circumferential surface image of the annular magnet steel group when it rotates; and an identification system for judging whether there are defects in the annular magnet steels in the annular magnet steel group according to the circumferential surface image.

[0006] Further, the rotating device includes: a first magnet steel support assembly for carrying the annular magnet steel group; a rotating assembly including a first rotating shaft provided at one end of the first magnet steel support assembly and a first power assembly for driving the first rotating shaft to rotate; a pressing assembly including a second rotating shaft provided at the other end of the first magnet steel support assembly and a second power assembly for driving the second rotating shaft to move in a direction approaching or departing from the other end of the annular magnet steel group.

[0007] Further, flexible pads are provided at the ends of the first rotating shaft and the second rotating shaft facing the annular magnet steel group.

[0008] Further, it further includes: a grasping and transferring device for moving an annular magnet group with the centers of the circles located on the same axis; a good product queue device, one end of which is used to receive the annular magnet group transferred from the rotating device by the grasping and transferring device, and the other end is the discharging end; a first air blowing device, located below one end of the good product queue device, having the same number of air blowing ports as the number of annular magnet groups transferred by the grasping and transferring device, and blowing air at the annular magnets with defective circumferential surface images detected by the recognition system to make them be removed from the good product queue device.

[0009] Further, it further includes: an end face detection device for detecting the two end faces of the annular magnet; an aligning device, located at the discharging end of the end face detection device, receiving the annular magnets with no defects on the end faces transferred by the end face detection device, and aligning at least one annular magnet into at least one group of annular magnet groups with the centers of the circles located on the same axis, so that the grasping and transferring device can transfer each group of annular magnet groups to the rotating device.

[0010] Further, the aligning device includes: a second magnet supporting component for carrying the annular magnet group; a pushing head, arranged on the supporting plate near the discharging end of the end face detection device; a pushing cylinder, driving the pushing head to push the annular magnets from the end face detection device one by one along the axial direction of the second magnet supporting component to the other end of the second magnet supporting component.

[0011] Further, the first magnet supporting component or the second magnet supporting component includes: a support rod, provided with two, the two support rods are parallel to each other and the interval is less than the outer diameter of the annular magnet, and is perpendicular to the discharging direction of the end face detection device; a supporting plate, arranged at both ends of the support rod for fixing the support rod.

[0012] Further, it further includes: a material shifting device for shifting a preset number of annular magnets on the support rod to be close to the supporting plate far away from the discharging end of the end face detection device to form a group of annular magnet groups with the centers of the circles located on the same axis.

[0013] Further, the end face detection device includes: a first track assembly having a first track inclined to one side and a first side baffle located on the inclined side of the first track. The annular permanent magnets are arranged in a row in sequence and roll from the front end to the rear end of the first track, and one end of the annular permanent magnet leans against the first side baffle while the other end exposes on the opposite side of the first side baffle; a second track assembly having a second track inclined to the other side and the front end connected to the rear end of the first track, and a second side baffle located on the inclined side of the second track. When the annular permanent magnet moves to the second track, the other end of the annular permanent magnet leans against the second side baffle while one end exposes on the opposite side of the second side baffle, and the rear end of the second track is the discharge end of the end face detection device; two guide plates, one is connected to one end of the first side baffle close to the second track and is inclined towards the second side baffle, and the other is connected to one end of the second side baffle close to the first track and is inclined towards the first side baffle; two sets of end face detection and processing assemblies are provided and are respectively arranged corresponding to the first track assembly and the second track assembly, and are used for detecting whether the annular permanent magnets passing through the first and second track assemblies are defective and driving the defective annular permanent magnets away from the first and second tracks.

[0014] Further, the end face detection and processing assembly includes: a photoelectric induction device for inducing the annular permanent magnets passing through the detection stations of the first and second tracks; a vision detection device for detecting one end of the annular permanent magnet exposed at the detection station according to the induction result of the photoelectric induction device to judge whether there are defects; a second air blowing device arranged below the detection station for blowing the annular permanent magnets judged to be defective by the end face vision detection device to drive them away from the first and second tracks.

[0015] The beneficial effects of the present invention are as follows: The present invention discloses a detection device for annular permanent magnets, including an end face detection device, an alignment module, a grasping and transferring device, a curved surface detection module, and a good product queue module arranged in sequence along the moving position of the annular permanent magnet. The curved surface detection module includes a rotating device, a curved surface detection device, and an identification system. The present invention can automatically detect whether there are appearance defects on the front and back end faces and the curved surface of the annular permanent magnet; under the driving force of the feeding mechanism, the annular permanent magnet moves in a semi-reclined state, which is beneficial to the detection of defects on the front and back end faces. The turning action is realized by means of a guide plate, and the structure is simple; for the curved surface detection of the annular permanent magnet, a rotating device is used. Stacking multiple annular permanent magnets along the axis direction of the rotating device and performing a single rotation action can automatically detect the curved surface defects of multiple annular permanent magnets at one time, and the detection efficiency is significantly improved; after the detection process is completed, the annular permanent magnets that have not been detected as defective can be neatly arranged along the central axis direction of the permanent magnet, which is beneficial to subsequent boxing. Description of the Drawings

[0016] Figure 1 is an assembly schematic diagram of the detection device for annular permanent magnets according to an embodiment of the present invention;

[0017] Figure 2It is a schematic structural diagram of an aligning device and a feeding device according to an embodiment of the present invention;

[0018] Figure 3 It is a schematic structural diagram of a grasping and transferring device according to an embodiment of the present invention;

[0019] Figure 4 It is a schematic structural diagram of a rotating device according to an embodiment of the present invention;

[0020] Figure 5 It is a schematic structural diagram of a good product queue device according to an embodiment of the present invention.

[0021] 1 - Ring-shaped permanent magnet; 2 - First track assembly; 3 - Photoelectric induction device; 4 - Visual detection device; 5 - Blowing device; 6 - Guide plate; 7 - Second track assembly; 8 - Visual detection device; 9 - Aligning device; 91 - Support rod; 92 - Support plate; 93 - Pushing head; 94 - Pushing cylinder; 10 - Feeding device; 101 - Feeding plate; 102 - Feeding cylinder; 103 - Displacement cylinder; 11 - Grasping and transferring device; 111 - Single-arm manipulator; 112 - Groove photoelectric sensor; 113 - Displacement cylinder; 114 - Grasping cylinder; 12 - Rotating device; 121 - Telescopic cylinder; 122 - Rotating shaft; 123 - Soft rubber pad; 124 - Servo motor; 125 - Belt; 126 - Soft rubber pad; 13 - Curved surface detection device; 14 - Good product queue device; 141 - Blowing port; 15 - Feeding device. Detailed implementation manners

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] Therefore, a feature pointed out in this specification will be used to illustrate one feature of one embodiment of the present invention, rather than implying that each embodiment of the present invention must have the illustrated feature. In addition, it should be noted that this specification describes many features. Although some features may be combined together to show a possible system design, these features can also be used in other combinations not explicitly described. Therefore, unless otherwise stated, the illustrated combination is not intended to be limiting.

[0024] The principle and structure of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0025] As Figure 1 shown, the present invention provides a detection device for a ring-shaped permanent magnet, including an end face detection device, an aligning module, a grasping and transferring device, a curved surface detection module and a good product queue module arranged in sequence along the moving position of the ring-shaped permanent magnet 1.

[0026] An end face detection device is used to detect the two end faces of an annular permanent magnet. The end face detection device includes: a first track assembly 2, which has a first track inclined to one side, and a first side baffle located on the inclined side of the first track and perpendicular to the first track. The annular permanent magnets are arranged in a row and roll from the front end to the rear end of the first track, and one end face of the annular permanent magnet leans on the first side baffle, and the other end face is exposed on the opposite side of the first side baffle; a second track assembly 7, which has a second track inclined to the other side and the front end of which is connected to the rear end of the first track, and a second side baffle located on the inclined side of the second track and perpendicular to the second track. When the annular permanent magnet moves to the front end of the second track, the other end face of the annular permanent magnet leans on the second side baffle, and one end face is exposed on the opposite side of the second side baffle. The rear end of the second track is the discharge end of the end face detection device; a guide plate 6, with two pieces respectively. One piece is connected to one end of the first side baffle close to the second track and is inclined towards the second side baffle, and the other piece is connected to one end of the second side baffle close to the first track and is inclined towards the first side baffle. As long as the highest point of the first track is not higher than the lowest point of the second track, that is, the first track and the second track are connected and the guide plate is used for drainage, the annular permanent magnet can smoothly move from the rear end of the first track to the front end of the second track under the push of manpower and realize the end face flipping action; an end face detection and processing assembly, with two groups, and is respectively arranged corresponding to the first track assembly and the second track assembly, and is used to detect whether the annular permanent magnets passing through the first and second track assemblies are defective and drive the defective annular permanent magnets away from the first and second tracks. Among them, the end face detection and processing assembly includes: a photoelectric induction device, arranged below the detection station, and used to induct the annular permanent magnets passing through the detection stations of the first and second tracks; an end face vision detection device, which detects one end face of the annular permanent magnet exposed at the detection station according to the induction result of the photoelectric induction device to judge whether there is a defect; a blowing device, arranged below the detection station, and used to blow the annular permanent magnets judged to be defective by the end face vision detection device to drive them away from the first and second tracks. The devices involved in each group of end face detection and processing assemblies all act on the annular permanent magnets at the same station.

[0027] Such as Figure 2As shown in the figure, the alignment module includes an alignment device 9 and a feeding device 10. The alignment device 9 is located at the discharging end of the end face detection device and receives the annular permanent magnets without defects on the end face transferred by the end face detection device. An annular permanent magnet without defects on the end face moves from the end face detection device to the support assembly of the alignment device 9. As an embodiment, the support assembly may be two support rods 91 that are parallel to each other, spaced less than the outer diameter of the annular permanent magnet, and perpendicular to the discharging direction of the end face detection device, and support plates 92 provided at both ends of the support rods 91 for fixing the support rods 91. As another embodiment, the support assembly may be a trough. A pusher 93 is provided at the corresponding position between the two parallel support rods 91 on the support plate 92 near the discharging end of the end face detection device. The pushing cylinder 94 drives the pusher 93 to push the annular permanent magnets from the end face detection device one by one towards the support plate 92 away from the discharging end of the end face detection device, that is, the alignment device 9 shapes at least one annular permanent magnet into at least one group of annular permanent magnets with their centers on the same axis. The feeding device 10 is used to dial a preset number of annular permanent magnets on the support rod 91 to be close to the support plate 92 away from the discharging end of the end face detection device, forming a group of annular permanent magnets with their centers on the same axis.

[0028] As Figure 3 shown in the figure, the grasping and transferring device 11 is used to move a group of annular permanent magnets with their centers on the same axis. For the grasping and transferring device 11, the alignment module plays a role of buffering and regularization, facilitating the grasping and transferring device 11 to transfer each group of annular permanent magnets with their centers on the same axis to the rotating device 12.

[0029] The curved surface detection module includes: a rotating device 12 that rotates a group of annular permanent magnets with their centers on the same axis transferred from the alignment device by the grasping and transferring device 11, including a support assembly for carrying the annular permanent magnet group, a rotating shaft provided at one end of the support assembly, a servo motor 124 for driving the rotating shaft to rotate, a belt 125 for connecting the rotating shaft and the rotating shaft of the servo motor 124, and a soft rubber pad 126 provided on the rotating shaft. A rotating shaft 122 is provided at the other end of the support assembly, a telescopic cylinder 121 for driving the rotating shaft 122 to move towards or away from the other end of the annular permanent magnet group, and a soft rubber pad 123 provided on the rotating shaft 122. Among them, as an embodiment, the support assembly may be two support rods that are parallel to each other, spaced less than the outer diameter of the annular permanent magnet, and perpendicular to the discharging direction of the end face detection device, and support plates provided at both ends of the rotating device 12 for fixing the support rods. As another embodiment, the support assembly may be a trough; a curved surface detection device 13 that acquires a 360° circumferential surface image of the annular permanent magnet when it rotates; and an identification system that judges whether the annular permanent magnet has defects according to the circumferential surface image.

[0030] The good product queue module includes: a good product queue device 14, one end of which is used to receive a group of annular permanent magnets transferred by the grasping and transferring device 11 from the rotating device 12, and the other end is the discharging end; a blowing device, located below one end of the good product queue device 14, as Figure 4 shown, having the same number of blowing ports 141 as the number of a group of annular permanent magnets transferred by the grasping and transferring device 11, and blowing the detected annular permanent magnet with defective circumferential surface image according to the detection result of the recognition system, so that it is removed from the good product queue device 14.

[0031] The permanent magnet described in the present invention is a flat annular permanent magnet. The discharging mechanism of the front-end process grinder or other feeding mechanisms are connected to the front end of the first track assembly 2. After the annular permanent magnet is produced, it is pushed by the discharging of the front-end process grinder or the power of other feeding mechanisms to enter the front end of the first track with one end face facing up, and the other end face is in contact with the inner part of the first side baffle. That is to say, the discharging of the front-end process grinder or the power of other feeding mechanisms pushes the annular permanent magnet queue to move forward. When the annular permanent magnet 1 moves to the working position corresponding to the photoelectric induction device 3, the photoelectric induction device 3 generates an induction signal. After being processed by the upper computer, the signal triggers the end face vision detection device 4 to take a photo of the exposed end face of the annular permanent magnet 1, and the obtained image is processed by the upper computer to determine whether there are defects. Since the single-annular-permanent-magnet sequential movement transfer method is adopted here, the vision detection device 4 only takes a photo of the end face of one annular permanent magnet, avoiding the problem of waste of repetitive shooting caused by taking photos of multiple annular permanent magnets at one time. Further, the upper computer can have the ability to determine the defect category after deep learning through artificial intelligence algorithms. If the end face of the annular permanent magnet 1 is detected to have a defect by the vision detection device 4, the vision detection device 4 triggers the blowing device 5 to blow air, and blows the annular permanent magnet 1 sensed by the photoelectric induction device 3 off the first track; if the end face of the annular permanent magnet 1 is not detected to have a defect by the end face vision detection device 4, the annular permanent magnet 1 continues to move forward along the annular permanent magnet queue on the first track.

[0032] When the annular permanent magnet 1 moves to the rear end of the first track, the annular permanent magnet 1 is guided by two small guide plates 6 under the push of human force and enters the front end of the second track. Since the inclination directions of the second side baffle and the first side baffle are opposite, the other end face of the annular permanent magnet 1 is turned upwards after entering the second track. Similarly, when the annular permanent magnet 1 moves to the working position corresponding to the photoelectric induction device on the second track, the photoelectric induction device generates an induction signal. After being processed by the host computer, the signal triggers the vision detection device 8 to take a photo of the end face of the annular permanent magnet 1, and the obtained image is processed by the host computer to determine whether there are defects. Similarly, the vision detection device 8 also only takes an image of the end face of one annular permanent magnet at a time. If the end face of the annular permanent magnet 1 is detected to have defects by the vision detection device 8, the vision detection device 8 triggers the blowing device on the second track to blow air, and blows the annular permanent magnet 1 on the working position sensed by the photoelectric induction device on the second track and aligned by the blowing device off the second track; if the end face of the annular permanent magnet 1 is not detected to have defects by the vision detection device 8, the annular permanent magnet 1 continues to move forward along with the annular permanent magnet queue on the second track.

[0033] When the annular permanent magnet 1 moves to the rear end of the second track, it naturally enters the front ends of the two support rods 91 of the aligning device 9 and stops statically. At this time, the annular permanent magnet 1 statically standing on the support rod 91 triggers the pushing cylinder 94 in the aligning device 9 to push the static annular permanent magnet 1 towards the rear end of the aligning device 9, so as to regularize the annular permanent magnet 1 into the annular permanent magnet queue in the aligning device 9. When the number of annular permanent magnets in the aligning device 9 reaches any set value m, the m annular permanent magnets trigger the displacement cylinder 103 and the dialing cylinder 102 of the dialing device 10 to drive the dialing plate 101 to dial the m annular permanent magnets into a close state. After the dialing action of the dialing device 10 is completed, it triggers the single-arm manipulator 111 of the grasping and transferring device 11 to grasp and transfer the m annular permanent magnets into the rotating device 12. The settings of the aligning device 9 and the dialing device 10 can align at least one group of m annular permanent magnets neatly, which is convenient for the grasping and transferring device 11 to grasp and transfer them into the rotating device 12, playing a buffering role for the subsequent photo detection. The groove photoelectric sensor 112 in the grasping and transferring device 11 is used to sense the moving position of the single-arm manipulator 111.

[0034] After m annular permanent magnets are transferred to the rotating device 12, the telescopic cylinder 121 drives the rotating shaft 122 to move towards the direction of the m annular permanent magnets until the soft rubber pad 123 presses tightly against the end face closest to the m annular permanent magnets, so that the other end faces of the m annular permanent magnets press tightly against the soft rubber pad 126. After the pressing action of the soft rubber pad 123 is completed, it triggers the servo motor 124 to drive the belt 125 to rotate through its rotating shaft, and then drives the soft rubber pad 126 to rotate. When the soft rubber pad 123 and the soft rubber pad 126 press tightly on the m annular permanent magnets and the soft rubber pad 126 rotates, the m annular permanent magnets and the soft rubber pad 123 rotate under the drive of the soft rubber pad 126. Among them, bearings can be selectively used for the rotating shafts at both ends of the rotating device 12 to reduce the friction caused by rotation.

[0035] The rotation action of the m annular permanent magnets triggers the curved surface detection device 13 to take pictures of the curved surfaces of the m annular permanent magnets, that is, the outer cylindrical surfaces. The setting of the rotating shaft helps to obtain images of the 360° curved surfaces of the m annular permanent magnets when the camera remains stationary. After the curved surface detection device 13 obtains the curved surface image, it triggers the single-arm manipulator 111 of the grasping and transferring device 11 to grasp and transfer the m annular permanent magnets to the good product queue device 14. The image obtained by the curved surface detection device 13 is processed by the upper computer to determine whether there are defects on the curved surfaces of the m annular permanent magnets. If defects are detected in the curved surface image, the recognition system records the positions of the annular permanent magnets corresponding to the curved surface defects. When the m annular permanent magnets are transferred to the good product queue device 14, the m annular permanent magnets trigger the blowing device on the good product queue device 14 to determine the position of the blowing port according to the position information recorded by the upper computer and perform a blowing action on the blowing port, so as to blow off the annular permanent magnets with defective curved surfaces from the good product queue device 14. After the blowing action of the blowing device is completed, it triggers the dialing device 15 to perform a dialing action, pushing the annular permanent magnets without detected defects on the good product queue device 14 towards the discharging end direction, making room for the subsequent grasping and transferring device 11 to continue transferring annular permanent magnets to the good product queue device 14. If the upper computer does not detect defects in the obtained curved surface image, when the grasping and transferring device 11 transfers the m annular permanent magnets to the good product queue device 14, the m annular permanent magnets on the good product queue device 14 directly trigger the dialing device 15 to perform a dialing action to push the annular permanent magnets without appearance defects towards the discharging end to achieve the discharging purpose.

[0036] The present invention can automatically detect whether there are appearance defects on the front and back ends and the curved surface of the annular permanent magnet. The single-sided defect detection time is within 10 ms, which is much less than the time used for manual visual inspection. Driven by the conveying power of the feeding mechanism, the annular permanent magnet moves in a semi-reclined manner, which is beneficial to the detection of defects on the front and back ends. The turning action is realized by means of a guiding plate, and the structure is simple. For the detection of the curved surface of the annular permanent magnet, a rotating device is adopted. By stacking multiple annular permanent magnets along the axis of the rotating device and performing a single rotation action, the automatic detection of the curved surface defects of multiple annular permanent magnets can be achieved at one time, reducing the orientation adjustment time of the detection surface in continuous detection, and significantly improving the detection efficiency. After the detection process is completed, the annular permanent magnets without detected defects can be neatly arranged along the central axis of the permanent magnet, which is beneficial to subsequent boxing. The sorting speed of the annular permanent magnets can reach 12,000 PCS / h, which is about 5 times that of traditional manual labor, with high speed and efficiency.

[0037] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A detection device for an annular permanent magnet, characterized in that, Including: A rotating device (12) for rotating an annular permanent magnet group with the centers of the circles on the same axis by at least 360°; A curved surface detection device (13) for obtaining an image of the circumferential surface of the annular permanent magnet group when the annular permanent magnet group rotates; An identification system for judging whether there are defects in the annular permanent magnets in the annular permanent magnet group according to the circumferential surface image; A grasping and transferring device (11) for moving the annular permanent magnet group with the centers of the circles on the same axis; A good product queue device (14) with one end for receiving the annular permanent magnet group transferred by the grasping and transferring device (11) from the rotating device (12), and the other end being the discharging end; A first blowing device, located below one end of the good product queue device (14), having the same number of blowing ports (141) as the number of the annular permanent magnet groups transferred by the grasping and transferring device (11), and blowing on the annular permanent magnets with defective circumferential surface images detected by the identification system to move them out of the good product queue device (14); An end face detection device for detecting the two end faces of the annular permanent magnet; the end face detection device includes: a first track assembly (2) having a first track inclined to one side and a first side baffle located on the inclined side of the first track, the annular permanent magnets are arranged in a row and roll from the front end to the rear end of the first track, and one end of the annular permanent magnet leans against the first side baffle and the other end exposes the opposite side of the first side baffle; a second track assembly (7) having a second track inclined to the other side and the front end connected to the rear end of the first track, and a second side baffle located on the inclined side of the second track, when the annular permanent magnet moves to the second track, the other end of the annular permanent magnet leans against the second side baffle and one end exposes the opposite side of the second side baffle, and the rear end of the second track is the discharging end of the end face detection device; guide plates (6), two of them are provided, one is connected to the end of the first side baffle close to the second track and is inclined towards the second side baffle, and the other is connected to the end of the second side baffle close to the first track and is inclined towards the first side baffle; end face detection and processing assemblies, two groups are provided and are respectively arranged corresponding to the first track assembly and the second track assembly, for detecting whether there are defects in the annular permanent magnets passing through the first and second track assemblies and driving the defective annular permanent magnets away from the first and second tracks; The alignment device (9) is located at the discharge end of the end face detection device, receives the annular permanent magnets without defects on the end face transferred by the end face detection device, and shapes at least one annular permanent magnet into at least one group of annular permanent magnets with their centers on the same axis, so that the grasping and transferring device (11) can transfer each group of annular permanent magnets to the rotating device (12); the alignment device (9) includes: a second permanent magnet support assembly for carrying the group of annular permanent magnets; a pusher head (93) arranged on a support plate (92) near the discharge end of the end face detection device; a pusher cylinder (94) for driving the pusher head (93) to push the annular permanent magnets from the end face detection device one by one along the axial direction of the second permanent magnet support assembly to the other end of the second permanent magnet support assembly.

2. The detecting device for the annular permanent magnet according to claim 1, characterized in that, The rotating device includes: a first permanent magnet support assembly for carrying the group of annular permanent magnets; a rotating assembly including a first rotating shaft arranged at one end of the first permanent magnet support assembly and a first power assembly for driving the first rotating shaft to rotate; a pressing assembly including a second rotating shaft arranged at the other end of the first permanent magnet support assembly and a second power assembly for driving the second rotating shaft to move towards or away from the group of annular permanent magnets.

3. The detecting device for the annular permanent magnet according to claim 2, characterized in that, Flexible pads are provided at one ends of the first rotating shaft and the second rotating shaft facing the group of annular permanent magnets.

4. The detecting device for the annular permanent magnet according to claim 2, characterized in that, The first permanent magnet support assembly or the second permanent magnet support assembly includes: two support rods (91), the two support rods (91) are parallel to each other and the distance between them is less than the outer diameter of the annular permanent magnet, and they are perpendicular to the discharge direction of the end face detection device; support plates (92) arranged at both ends of the support rods (91) for fixing the support rods (91).

5. The detecting device for the annular permanent magnet according to claim 4, characterized in that, It further includes: a material shifting device (10) for shifting a preset number of annular permanent magnets on the support rods (91) to the support plate far from the discharge end of the end face detection device to form a group of annular permanent magnets with their centers on the same axis.

6. The detecting device for the annular permanent magnet according to claim 1, wherein, The end face detection and processing assembly includes: a photoelectric induction device for inducing the annular permanent magnets passing through the detection stations of the first and second tracks; a visual detection device for detecting one end of the annular permanent magnet exposed at the detection station according to the induction result of the photoelectric induction device to judge whether there are defects; a second air blowing device arranged below the detection station for blowing the annular permanent magnets judged to have defects by the visual detection device to drive them away from the first and second tracks.

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