A detection device and method for surface coating of NdFeB permanent magnet material

Abstract

The present invention discloses a surface coating detection device for NdFeB permanent magnet material and a detection method thereof, comprising a primary screening mechanism and a detection mechanism, wherein the primary screening mechanism is fixedly connected to one side of the detection mechanism through a conveying channel, the primary screening mechanism comprises a frame and a vibrating feeder, the upper surface of the frame is fixedly connected to the vibrating feeder through bolts, and the mounting seat is movably connected to the control panel through a pin shaft. The surface coating detection device for NdFeB permanent magnet material and a detection method thereof measure the size and tolerance of the material through a measuring mechanism, replace the manual visual quality inspection mode, greatly reduce the manual labor, cooperate with a magnetic flux probe to perform magnetic force detection, detect the measurement procedure, improve the measurement accuracy, reduce the measurement error, and improve the factory qualified rate, and use a second thick film probe to simultaneously detect the quality of the material electroplating layer of multiple materials, further improve the measurement efficiency, and at the same time ensure the measurement quality, bringing good economic benefits to the enterprise.

Description

Technical Field

[0001] The invention relates to the technical field of NdFeB permanent magnet materials, and in particular to a NdFeB permanent magnet material surface coating detection device and a detection method thereof. Background Art

[0002] NdFeB permanent magnets are one of the magnets with the largest magnetic energy product at present, and have extremely high magnetic energy product and coercive force. They are currently widely used in various electronic products. Through the high performance of NdFeB magnets, instruments, electroacoustic motors, magnetic separation and magnetization equipment can be miniaturized, lightweight and thinned as much as possible. The advantages of NdFeB are high cost performance and good mechanical properties; the disadvantages are low operating temperature, poor temperature characteristics, and easy powdering and corrosion. It is necessary to adjust its chemical composition and take certain treatments to improve its related properties in order to meet the requirements of practical applications.

[0003] Under the existing technology, in the process of detecting the surface coating of NdFeB magnets, the current traditional detection device often manually identifies surface defects, which not only has a high error rate, but also consumes a lot of manual labor; and the manual detection usually uses a Gauss meter, which mainly measures the magnetic force of a point on the surface. Since there is a certain difference in the magnetic force of each point on the surface of the magnet, and the edge magnetic force is higher than the magnetic force of the center point, the measured data error is large. Therefore, with the increasing application of NdFeB magnets, the requirements for the processing technology and quality of NdFeB magnets are also getting higher and higher, so it is urgent to develop and improve its surface coating detection technology and related equipment. Summary of the invention

[0004] The purpose of the present invention is to provide a surface coating detection device and a detection method for NdFeB permanent magnet materials. The size and tolerance of the material are measured by a measuring mechanism to replace the manual naked eye quality inspection mode, which greatly reduces manual labor. The magnetic force detection is carried out in conjunction with a flux probe to detect the measurement procedure, improve the measurement accuracy, reduce the measurement error, and improve the factory qualified rate. The quality of the electroplating layer of multiple materials is detected at the same time by a second thick film probe, which further improves the measurement efficiency and ensures the measurement quality, bringing good economic benefits to the enterprise to solve the technical problems described in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A device for detecting surface coating of NdFeB permanent magnet material comprises a primary screening mechanism and a detection mechanism, wherein the primary screening mechanism is fixedly connected to one side of the detection mechanism through a conveying channel, the primary screening mechanism comprises a frame and a vibrating feeder, the upper surface of the frame is fixedly connected to the four sides of the vibrating feeder through bolts, the upper end of one side of the vibrating feeder is fixedly connected to the conveying channel, the detection mechanism comprises a detection chassis and a control panel, the lower surface of the detection chassis is fixedly connected to a support seat and a universal wheel through bolts, the surface of the detection chassis is connected to a maintenance door through hinges, one side of the upper surface of the detection chassis is connected to an observation door through hinges, an observation window is provided on the surface of the observation door, the lower end of the observation door is fixedly connected to a handle through bolts, a switch button and a control button are respectively arranged on one side of the detection chassis, the lower part of the control button is fixedly connected to a mounting seat through bolts, and the mounting seat is movably connected to the control panel through a pin shaft.

[0007] Furthermore, a detection device is installed in the detection chassis, and the detection device includes a conveying platform, a flux measuring needle and a first thick film measuring needle. Openings are respectively provided on both sides of the detection chassis. The opening on the left side of the detection chassis is fixedly connected to the lower end of the conveying channel by bolts, and the opening on the right side of the detection chassis is fixedly connected to both sides of the conveying platform by bolts. One end of the conveying platform is fixed at the opening at the lower end of the conveying channel, and the other end extends through the opening on the right side of the detection chassis to its outside. The upper surface of the detection chassis is fixedly connected to the detection box by bolts, and an indicator light is provided on one side of the upper surface of the detection chassis.

[0008] Furthermore, the vibrating feeder includes a vibrating screen plate, a vibrating motor and a conveying track. The center of the vibrating screen plate is fixedly connected to the motor shaft of the vibrating motor through a rotating shaft. The inclination angle of the vibrating screen plate to the horizontal plane is 15°. A conveying track is arranged on the upper surface of the vibrating screen plate. One end of the conveying track is in contact with the upwardly inclined side of the vibrating screen plate. The inclination angle of the conveying track to the horizontal plane is 10°. The conveying track spirally surrounds the inner side of the vibrating feeder upward. The upper end of the conveying track is horizontal, and one side of the upper end of the conveying track is fixedly connected to the spacing adjustment plate and the screening plate by bolts respectively.

[0009] Furthermore, the conveying platform is composed of a conveying motor, a conveying frame and a conveyor belt. The conveying motor is connected to the rotating shaft at one end of the conveyor belt through a transmission belt. Guide grooves are respectively arranged on the surface of the conveyor belt. Both sides of the conveying frame are fixedly connected to the measuring mechanism by bolts. A group of magnetic flux measuring needles are provided and are respectively arranged above the conveyor belt. The magnetic flux measuring needles are perpendicular to the conveyor belt.

[0010] Furthermore, the measuring mechanism includes a fixed plate, a vernier caliper, a measuring motor, a positioning block, a measuring block and a sensing needle. The fixed plate is fixedly connected to both sides of the conveying frame by bolts on all sides, and the outer side of the fixed plate is fixedly connected to both ends of the vernier caliper by bolts. A scale is provided on the upper surface of the vernier caliper, and the scale unit is millimeter.

[0011] Furthermore, a measuring motor is installed on one side of the lower end of the vernier caliper, and a positioning block is installed on the other side of the lower end of the vernier caliper. A movable slot is provided on the vernier caliper, and the upper end of the positioning block is buckled with the movable slot. The inner side of the measuring block is transmission-connected to the motor shaft at one end of the measuring motor through a transmission belt, one end of the movable slot is fixedly connected to the sensing needle through a bolt, one side of the upper end of the measuring block is fixedly connected to the other sensing needle through a bolt, and the other sensing needle is slidably connected to the movable slot.

[0012] Furthermore, the first thick film measuring probe is installed on one side of the tail end of the conveying platform, and the first thick film measuring probe is composed of a movable base, a cylinder base, a first cylinder, a first telescopic rod, a measuring machine head and a first measuring probe body. The upper surface of the movable base is rotatably connected to the cylinder base through a bearing, the upper surface of the cylinder base is fixedly connected to the first cylinder through bolts, the upper end of the first cylinder is fixedly connected to one end of the first telescopic rod through a cylinder rod, the first telescopic rod is configured as an electric telescopic rod, one end of the first telescopic rod is fixedly connected to the measuring machine head through bolts, and one side of the measuring machine head is movably connected to the upper end of the first measuring probe body through a pin shaft.

[0013] Furthermore, a second thick film probe is arranged at the tail end of the conveying platform, and the second thick film probe includes a fixed seat, a second cylinder, a second telescopic rod, a measuring machine box and a second probe body. The upper surface of the fixed seat is fixedly connected to the second cylinder by bolts, and the fixed seat and the second cylinder constitute a longitudinal moving mechanism. The longitudinal moving mechanism is symmetrically arranged on both sides of the conveying platform, and the upper end of the second cylinder is fixedly connected to the second telescopic rod by a cylinder rod, and the inner side of the second telescopic rod is fixedly connected to both ends of the measuring machine box, and the second probe body is evenly arranged on the lower surface of the measuring machine box.

[0014] The present invention provides another technical solution, a detection method of a surface coating detection device of a NdFeB permanent magnet material, comprising the following steps:

[0015] Step 1: Preliminary screening and feeding. Pour the material to be tested into the vibrating feeder, start the vibrating motor, receive the material conveyed by the upwardly inclined end of the vibrating screen plate through the conveying track, and convey the material upward in a vibrating manner, and screen the material through the screening plate. When the material does not meet the standard or cannot be adjusted, it will fall into the vibrating screen plate for re-conveyance. After the material is adjusted by vibration and screening plate, the material is conveyed from the inner side of the screening plate to the side of the spacing adjustment plate, adjust the spacing between the materials, and convey the materials to the detection mechanism through the conveying channel;

[0016] Step 2: Appearance inspection: the material is transported by the conveyor belt, and the guide groove plays a role of limiting and guiding the material to ensure the position and conveying direction of the material when it slides from the conveying channel. The material is measured by the measuring mechanism, mainly measuring the size and tolerance of the material, and the magnetic force on the surface of the material is measured by the magnetic flux probe;

[0017] Step 3: Thickness detection: Use the first thick film probe to detect the thickness of the NdFeB permanent magnet material plating layer of the material. By rotating the cylinder base, adjust the height of the first cylinder, and at the same time, cooperate with the extension of the first telescopic rod to position the first probe body above the material for detection in turn.

[0018] Further, the following steps are included:

[0019] Step 1: Preliminary screening and feeding. Pour the material to be tested into the vibrating feeder, start the vibrating motor, receive the material conveyed by the upwardly inclined end of the vibrating screen plate through the conveying track, and convey the material upward in a vibrating manner, and screen the material through the screening plate. When the material does not meet the standard or cannot be adjusted, it will fall into the vibrating screen plate for re-conveyance. After the material is adjusted by vibration and screening plate, the material is conveyed from the inner side of the screening plate to the side of the spacing adjustment plate, adjust the spacing between the materials, and convey the materials to the detection mechanism through the conveying channel;

[0020] Step 2: Appearance inspection: convey the material through the conveyor belt, and use the guide groove to limit and guide the material to ensure the position and conveying direction of the material when it slides from the conveying channel. The material is measured by the measuring mechanism, mainly measuring the size and tolerance of the material. At the same time, the magnetic force on the surface of the material is measured by the magnetic flux probe. At the same time, the material is adjusted by induction to make the material on the same moving line;

[0021] Step 3: Thickness detection: Use the second thick film probe to detect the thickness of the NdFeB permanent magnet material plating layer of the material. By adjusting the height of the second cylinder and telescoping the second telescopic rod, the second probe body is positioned above the material for simultaneous detection.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention proposes a device and method for detecting surface coating of NdFeB permanent magnet materials, which uses a vibrating feeder to preliminarily screen the materials, thereby reducing the working pressure of subsequent detection and effectively providing a guarantee for the efficiency of subsequent detection.

[0024] 2. The present invention proposes a device and method for detecting surface coatings of NdFeB permanent magnet materials. The device measures the size and tolerance of the material through a measuring mechanism, replacing the manual visual quality inspection mode, greatly reducing manual labor, and cooperates with a flux probe to perform magnetic force detection, detect the measurement procedure, improve measurement accuracy, reduce measurement errors, and increase the factory qualification rate.

[0025] 3. The present invention proposes a device and method for detecting the surface coating of NdFeB permanent magnet materials, wherein the measurement data is displayed on the control panel in real time and objectively, so as to accurately, effectively and timely detect the quality of the NdFeB permanent magnet coating.

[0026] 4. The present invention proposes a NdFeB permanent magnet material surface coating detection device and detection method, which can detect the quality of the electroplating layer of multiple materials at the same time through the second thick film probe, and detect them in the detection mechanism, so as to avoid the influence of ambient temperature and wind speed on the accuracy of the sensor, improve the detection quality, ensure the stability, repeatability and accuracy of the test, further improve the measurement efficiency, and at the same time ensure the measurement quality, bringing good economic benefits to the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0028] Figure 2 It is a three-dimensional diagram of the detection mechanism of the present invention;

[0029] Figure 3 It is a three-dimensional diagram of the vibrating feeder of the present invention;

[0030] Figure 4 It is a three-dimensional diagram of a detection device according to embodiment 1 of the present invention;

[0031] Figure 5 It is a three-dimensional diagram of the measuring mechanism of the present invention;

[0032] Figure 6 A three-dimensional diagram of a first thick film probe of the present invention;

[0033] Figure 7 It is a three-dimensional diagram of a detection device according to a second embodiment of the present invention;

[0034] Figure 8 A three-dimensional diagram of a second thick film probe of the present invention;

[0035] Fig. 9 The present invention is a flow chart of the detection method.

[0036] In the figure: 1. Pre-screening mechanism; 11. Frame; 12. Vibrating feeder; 121. Vibrating screen plate; 122. Vibrating motor; 123. Conveying track; 124. Spacing adjustment sheet; 125. Screening sheet; 2. Detection mechanism; 21. Detection chassis; 22. Control panel; 23. Support seat; 24. Universal wheel; 25. Maintenance door; 26. Observation door; 27. Switch button; 28. Control button; 29. ​​Mounting seat; 3. Conveying channel; 4. Detection box; 5. Indicator light; 6. Detection device; 61. Conveying platform; 611. Conveying motor; 612. Conveying frame; 613. Conveying Feeding tape; 614, guide groove; 62, flux measuring needle; 63, first thick film measuring needle; 631, movable base; 632, cylinder base; 633, first cylinder; 634, first telescopic rod; 635, measuring head; 636, first measuring needle body; 64, measuring mechanism; 641, fixing plate; 642, vernier caliper; 643, measuring motor; 644, positioning block; 645, measuring block; 646, induction needle; 65, second thick film measuring needle; 651, fixing seat; 652, second cylinder; 653, second telescopic rod; 654, measuring chassis; 655, second measuring needle body. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1

[0039] See also Figure 1-2A device for detecting surface coating of NdFeB permanent magnet material comprises a primary screening mechanism 1 and a detection mechanism 2. The primary screening mechanism 1 is fixedly connected to one side of the detection mechanism 2 through a conveying channel 3. The primary screening mechanism 1 comprises a frame 11 and a vibrating feeder 12. The upper surface of the frame 11 is fixedly connected to the surrounding of the vibrating feeder 12 through bolts. The upper end of one side of the vibrating feeder 12 is fixedly connected to the conveying channel 3. The detection mechanism 2 comprises a detection chassis 21 and a control panel 22. The lower surface of the detection chassis 21 is fixedly connected to a support seat 23 and a universal wheel 24 through bolts. The surface of the detection chassis 21 is connected to a maintenance door 25 through hinges. One side of the upper surface of the detection chassis 21 is connected to an observation door 26 through hinges. An observation window is provided on the surface of the observation door 26. The lower end of the observation door 26 is fixedly connected to the handle through bolts. A switch button 27 and a control button 28 are respectively arranged on one side of the detection chassis 21. The control buttons 28 are respectively connected below the control buttons 28. It is fixedly connected to the mounting seat 29 by bolts, and the mounting seat 29 is movably connected to the control panel 22 by a pin shaft. A detection device 6 is installed in the detection chassis 21, and the detection device 6 includes a conveying platform 61, a flux measuring needle 62 and a first thick film measuring needle 63. Openings are respectively provided on both sides of the detection chassis 21. The left opening of the detection chassis 21 is fixedly connected to the lower end of the conveying channel 3 by bolts, and the right opening of the detection chassis 21 is fixedly connected to both sides of the conveying platform 61 by bolts. One end of the conveying platform 61 is fixed at the opening at the lower end of the conveying channel 3, and the other end passes through the right opening of the detection chassis 21 and extends to its outside. The upper surface of the detection chassis 21 is fixedly connected to the detection box 4 by bolts, and an indicator light 5 is provided on one side of the upper surface of the detection chassis 21. The overall structure is compact, and the materials are screened and detected through the primary screening mechanism 1 and the detection mechanism 2. The detection efficiency is high, the detection quality is high, the observation is convenient, the operation is simple, the application range is wide, and the flexibility is high.

[0040] See also Figure 3 The vibrating feeder 12 includes a vibrating screen plate 121, a vibrating motor 122 and a conveying track 123. The center of the vibrating screen plate 121 is fixedly connected to the motor shaft of the vibrating motor 122 through a rotating shaft. The inclination angle of the vibrating screen plate 121 to the horizontal plane is 15°. A conveying track 123 is arranged on the upper surface of the vibrating screen plate 121. One end of the conveying track 123 contacts the upwardly inclined side of the vibrating screen plate 121. The inclination angle of the conveying track 123 to the horizontal plane is 10°. The conveying track 123 spirally surrounds the inner side of the vibrating feeder 12, and the upper end of the conveying track 123 is horizontal. One side of the upper end of the conveying track 123 is fixedly connected to the spacing adjustment plate 124 and the screening plate 125 by bolts respectively. The material is preliminarily screened by the vibrating feeder 12, which reduces the working pressure of subsequent detection and effectively provides guarantee for the efficiency of subsequent detection.

[0041] See also Figure 4-5The conveying platform 61 is composed of a conveying motor 611, a conveying frame 612 and a conveying belt 613. The conveying motor 611 is connected to the rotating shaft at one end of the conveying belt 613 through a transmission belt. The surface of the conveying belt 613 is respectively provided with guide grooves 614. Both sides of the conveying frame 612 are fixedly connected to the measuring mechanism 64 by bolts. There are 5 groups of flux measuring needles 62, which are respectively arranged above the conveying belt 613. The flux measuring needles 62 are perpendicular to the conveying belt 613. The upper ends of the flux measuring needles 62 are electrically connected to the detection box 4 through wires. The measuring mechanism 64 includes a fixed plate 641, a vernier caliper 642, a measuring motor 643, a positioning block 644, a measuring block 645 and a sensing needle 646. The fixed plate 641 is fixedly connected to both sides of the conveying frame 612 by bolts. The outer side of the fixed plate 641 is fixedly connected to both ends of the vernier caliper 642 by bolts. A scale is provided on the upper surface of the vernier caliper 642, and the scale unit is Millimeters, a measuring motor 643 is installed on one side of the lower end of the vernier caliper 642, and a positioning block 644 is installed on the other side of the lower end of the vernier caliper 642. A movable slot is set on the vernier caliper 642, and the upper end of the positioning block 644 is buckled with the movable slot. The inner side of the measuring block 645 is connected to the motor shaft at one end of the measuring motor 643 through a transmission belt, and one end of the movable slot is fixedly connected to the sensing needle 646 through a bolt. One side of the upper end of the measuring block 645 is fixedly connected to another sensing needle 646 through a bolt, and the other sensing needle 646 is slidably connected to the movable slot. The size and tolerance of the material are measured by the measuring mechanism 64, which replaces the manual naked eye quality inspection mode, greatly reducing manual labor, and cooperating with the flux measuring needle 62 for magnetic detection, detecting the measurement procedure, improving the measurement accuracy, reducing the measurement error, and improving the factory qualification rate. The measurement data is displayed on the control panel 22 in real time and objectively, and the quality of the NdFeB permanent magnet coating is accurately, effectively and timely detected.

[0042] See also Figure 6 The first thick film measuring needle 63 is installed on one side of the tail end of the conveying platform 61. The first thick film measuring needle 63 is composed of a movable base 631, a cylinder base 632, a first cylinder 633, a first telescopic rod 634, a measuring head 635 and a first measuring needle body 636. The upper surface of the movable base 631 is rotatably connected to the cylinder base 632 through a bearing, and the upper surface of the cylinder base 632 is fixedly connected to the first cylinder 633 through a bolt. The upper end of the first cylinder 633 is fixedly connected to one end of the first telescopic rod 634 through a cylinder rod. The first telescopic rod 634 is set as an electric telescopic rod. One end of the first telescopic rod 634 is fixedly connected to the measuring head 635 by bolts. One side of the measuring head 635 is movably connected to the upper end of the first measuring needle body 636 through a pin shaft. The quality of the material electroplating layer can be effectively detected through the first thick film measuring needle 63, and detected in the detection mechanism 2, so as to avoid the influence of ambient temperature and wind speed on the accuracy of the sensor, improve the detection quality, and ensure the stability, repeatability and accuracy of the test.

[0043] See also Fig. 9 , a detection method for a surface coating detection device of a NdFeB permanent magnet material, comprising the following steps:

[0044] Step 1: Preliminary screening and feeding, pour the material to be tested into the vibrating feeder 12, start the vibrating motor 122, receive the material conveyed by the upwardly inclined end of the vibrating screen plate 121 through the conveying track 123, and convey the material upward in a vibrating manner, and screen the material through the screening piece 125. When the material does not meet the standard or cannot be adjusted, it will fall into the vibrating screen plate 121 for re-conveyance. After the material is adjusted by vibration and the screening piece 125, the material is conveyed from the inner side of the screening piece 125 to the side of the spacing adjustment piece 124, the spacing between the materials is adjusted, and the materials are respectively conveyed to the detection mechanism 2 through the conveying channel 3;

[0045] Step 2: Appearance inspection: the material is transported by the conveyor belt 613, and the guide groove 614 plays a role of limiting and guiding the material to ensure the position and conveying direction of the material when it slides from the conveying channel 3. The material is measured by the measuring mechanism 64, mainly measuring the size and tolerance of the material, and the magnetic force on the surface of the material is measured by the magnetic flux measuring needle 62;

[0046] Step 3: Thickness detection: Use the first thick film probe 63 to detect the thickness of the NdFeB permanent magnet material electroplating layer of the material. By rotating the cylinder base 632, adjust the height of the first cylinder 633, and at the same time, cooperate with the telescopic first telescopic rod 634 to position the first probe body 636 above the material for detection in turn.

[0047] Embodiment 2

[0048] See also Figure 7-8 , which is different from the first embodiment, a second thick film probe 65 is arranged at the tail end of the conveying platform 61, and the second thick film probe 65 includes a fixed seat 651, a second cylinder 652, a second telescopic rod 653, a measuring chassis 654 and a second probe body 655. The upper surface of the fixed seat 651 is fixedly connected with the second cylinder 652 by bolts, and the fixed seat 651 and the second cylinder 652 constitute a longitudinal moving mechanism, which is symmetrically arranged on both sides of the conveying platform 61. The upper end of the second cylinder 652 is fixedly connected with the second telescopic rod 653 by cylinder rods, and the inner side of the second telescopic rod 653 is fixedly connected with both ends of the measuring chassis 654, and the lower surface of the measuring chassis 654 is evenly provided with second probe bodies 655. Multiple materials are detected at the same time through the second probe body 655, which further improves the measurement efficiency and ensures the measurement quality, bringing good economic benefits to the enterprise.

[0049] See also Fig. 9, a detection method for a surface coating detection device of a NdFeB permanent magnet material, comprising the following steps:

[0050] Step 1: Preliminary screening and feeding, pour the material to be tested into the vibrating feeder 12, start the vibrating motor 122, receive the material conveyed by the upwardly inclined end of the vibrating screen plate 121 through the conveying track 123, and convey the material upward in a vibrating manner, and screen the material through the screening piece 125. When the material does not meet the standard or cannot be adjusted, it will fall into the vibrating screen plate 121 for re-conveyance. After the material is adjusted by vibration and the screening piece 125, the material is conveyed from the inner side of the screening piece 125 to the side of the spacing adjustment piece 124, the spacing between the materials is adjusted, and the materials are respectively conveyed to the detection mechanism 2 through the conveying channel 3;

[0051] Step 2: Appearance inspection: the material is transported by the conveyor belt 613, and the guide groove 614 plays a role of limiting and guiding the material to ensure the position and conveying direction of the material when it slides from the conveying channel 3. The material is measured by the measuring mechanism 64, mainly measuring the size and tolerance of the material. At the same time, the magnetic force on the surface of the material is measured by the magnetic flux measuring needle 62, and the material is adjusted by the induction needle 646 to make the material on the same moving line;

[0052] Step 3: Thickness detection: Use the second thick film probe 65 to detect the thickness of the NdFeB permanent magnet material electroplating layer of the material. By adjusting the height of the second cylinder 652 and cooperating with the telescopic second telescopic rod 653, the second probe body 655 is positioned above the material for simultaneous detection.

[0053] In summary, the surface coating detection device and detection method of NdFeB permanent magnet material use the vibrating feeder 12 to perform preliminary screening of materials, thereby reducing the work pressure of subsequent detection and effectively providing guarantee for the efficiency of subsequent detection. The measuring mechanism 64 measures the size and tolerance of the material to replace the manual visual quality inspection mode, which greatly reduces manual labor. The magnetic force detection is performed in conjunction with the flux probe 62 to detect the measurement procedure, improve the measurement accuracy, reduce the measurement error, and improve the factory qualified rate. The measurement data is displayed on the control panel 22 in real time and objectively, and the quality of the NdFeB permanent magnet coating is accurately, effectively and timely detected. The second thick film probe 65 is used to simultaneously detect the quality of the electroplating layer of multiple materials, and the detection is performed in the detection mechanism 2 to avoid the influence of ambient temperature and wind speed on the accuracy of the sensor, thereby improving the detection quality, ensuring the stability, repeatability and accuracy of the test, further improving the measurement efficiency, and at the same time ensuring the measurement quality, which brings good economic benefits to the enterprise.

[0054] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for detecting surface coating of NdFeB permanent magnet material, characterized in that: The invention comprises a primary screening mechanism (1) and a detection mechanism (2), wherein the primary screening mechanism (1) is fixedly connected to one side of the detection mechanism (2) via a conveying channel (3), the primary screening mechanism (1) comprises a frame (11) and a vibrating feeder (12), the upper surface of the frame (11) is fixedly connected to the vibrating feeder (12) on all sides via bolts, the upper end of one side of the vibrating feeder (12) is fixedly connected to the conveying channel (3), the detection mechanism (2) comprises a detection chassis (21) and a control panel (22), the lower surface of the detection chassis (21) is fixedly connected to a support seat (23) and a universal wheel (24) via bolts. ), the surface of the detection box (21) is connected to the maintenance door (25) by hinges, one side of the upper surface of the detection box (21) is connected to the observation door (26) by hinges, an observation window is provided on the surface of the observation door (26), the lower end of the observation door (26) is fixedly connected to the handle by bolts, a switch button (27) and a control button (28) are provided on one side of the detection box (21), the lower part of the control button (28) is fixedly connected to the mounting seat (29) by bolts, and the mounting seat (29) is movably connected to the control panel (22) by a pin shaft; A detection device (6) is installed in the detection box (21), and the detection device (6) comprises a conveying platform (61), a magnetic flux measuring needle (62) and a first thick film measuring needle (63). Openings are respectively arranged on both sides of the detection box (21). The left opening of the detection box (21) is fixedly connected to the lower end of the conveying channel (3) by bolts. The right opening of the detection box (21) is fixedly connected to both sides of the conveying platform (61) by bolts. One end of the conveying platform (61) is fixed to the lower opening of the conveying channel (3), and the other end passes through the right opening of the detection box (21) and extends to the outside thereof. The upper surface of the detection box (21) is fixedly connected to the detection box (4) by bolts. An indicator light (5) is arranged on one side of the upper surface of the detection box (21); The measuring mechanism (64) comprises a fixed plate (641), a vernier caliper (642), a measuring motor (643), a positioning block (644), a measuring block (645) and a sensing needle (646); the fixed plate (641) is fixedly connected to both sides of the conveying frame (612) by bolts on all sides; the outer side of the fixed plate (641) is fixedly connected to both ends of the vernier caliper (642) by bolts; and a scale is provided on the upper surface of the vernier caliper (642), and the scale unit is millimeters; A measuring motor (643) is installed on one side of the lower end of the vernier caliper (642), and a positioning block (644) is installed on the other side of the lower end of the vernier caliper (642). A movable groove is provided on the vernier caliper (642), and the upper end of the positioning block (644) is buckled and connected to the movable groove. The inner side of the measuring block (645) is connected to the motor shaft at one end of the measuring motor (643) through a transmission belt, and one end of the movable groove is fixedly connected to the sensing needle (646) through a bolt. One side of the upper end of the measuring block (645) is fixedly connected to the other sensing needle (646) through a bolt, and the other sensing needle (646) is slidably connected to the movable groove.

2. A NdFeB permanent magnet material surface coating detection device as claimed in claim 1, characterized in that: The vibrating feeder (12) comprises a vibrating screen plate (121), a vibrating motor (122) and a conveying track (123); the center of the vibrating screen plate (121) is fixedly connected to the motor shaft of the vibrating motor (122) via a rotating shaft; the vibrating screen plate (121) is inclined at an angle of 15° to a horizontal plane; a conveying track (123) is arranged on the upper surface of the vibrating screen plate (121); one end of the conveying track (123) contacts an upwardly inclined side of the vibrating screen plate (121); the conveying track (123) is inclined at an angle of 10° to the horizontal plane; the conveying track (123) spirally surrounds the inner side of the vibrating feeder (12); the upper end of the conveying track (123) is horizontal; one side of the upper end of the conveying track (123) is fixedly connected to a spacing adjustment plate (124) and a screening plate (125) via bolts.

3. A NdFeB permanent magnet material surface coating detection device as claimed in claim 2, characterized in that: The conveying platform (61) is composed of a conveying motor (611), a conveying frame (612) and a conveying belt (613). The conveying motor (611) is connected to a rotating shaft at one end of the conveying belt (613) through a transmission belt. The surface of the conveying belt (613) is provided with guide grooves (614). Both sides of the conveying frame (612) are fixedly connected to the measuring mechanism (64) through bolts. Five groups of magnetic flux measuring needles (62) are provided and are respectively arranged above the conveying belt (613). The magnetic flux measuring needles (62) and the conveying belt (613) are perpendicular to each other.

4. A NdFeB permanent magnet material surface coating detection device as claimed in claim 3, characterized in that: The first thick film measuring needle (63) is installed on one side of the tail end of the conveying platform (61). The first thick film measuring needle (63) is composed of a movable base (631), a cylinder base (632), a first cylinder (633), a first telescopic rod (634), a measuring head (635) and a first measuring needle body (636). The upper surface of the movable base (631) is rotatably connected to the cylinder base (632) via a bearing, the upper surface of the cylinder base (632) is fixedly connected to the first cylinder (633) via bolts, the upper end of the first cylinder (633) is fixedly connected to one end of the first telescopic rod (634) via a cylinder rod, the first telescopic rod (634) is set as an electric telescopic rod, one end of the first telescopic rod (634) is fixedly connected to the measuring head (635) via bolts, and one side of the measuring head (635) is movably connected to the upper end of the first measuring needle body (636) via a pin shaft.

5. A NdFeB permanent magnet material surface coating detection device as claimed in claim 4, characterized in that: A second thick film measuring needle (65) is arranged at the rear end of the conveying platform (61). The second thick film measuring needle (65) comprises a fixed seat (651), a second cylinder (652), a second telescopic rod (653), a measuring case (654) and a second measuring needle body (655). The upper surface of the fixed seat (651) is fixedly connected to the second cylinder (652) by bolts. The fixed seat (651) and the second cylinder (652) constitute a longitudinal moving mechanism. The longitudinal moving mechanism is symmetrically arranged on both sides of the conveying platform (61). The upper end of the second cylinder (652) is fixedly connected to the second telescopic rod (653) by cylinder rods. The inner side of the second telescopic rod (653) is fixedly connected to both ends of the measuring case (654). The lower surface of the measuring case (654) is evenly provided with the second measuring needle body (655).

6. A detection method for the surface coating detection device of NdFeB permanent magnet material as claimed in claim 5, characterized in that: The following steps are involved: Step 1: Preliminary screening and feeding, pouring the material to be tested into the vibrating feeder (12), starting the vibrating motor (122), receiving the material conveyed by the upwardly inclined end of the vibrating screen plate (121) through the conveying track (123), and conveying the material upward in a vibrating manner, and screening the material through the screening plate (125). When the material does not meet the standard or cannot be adjusted, it will fall into the vibrating screen plate (121) to be re-conveyed. After the material is adjusted by vibration and the screening plate (125), the material is conveyed from the inner side of the screening plate (125) to the side of the spacing adjustment plate (124), the spacing between the materials is adjusted, and the materials are respectively conveyed to the detection mechanism (2) through the conveying channel (3); Step 2: Appearance inspection, the material is transported by the conveyor belt (613), and the guide groove (614) plays a role of limiting and guiding the material to ensure the position and conveying direction of the material when it slides from the conveying channel (3), and the measuring mechanism (64) measures the material to measure the size and tolerance of the material, and at the same time measures the magnetic force on the surface of the material by the magnetic flux measuring needle (62); Step 3: Thickness detection: The thickness of the NdFeB permanent magnet material electroplating layer of the material is detected by using the first thick film probe (63). The height of the first cylinder (633) is adjusted by rotating the cylinder base (632). At the same time, the first telescopic rod (634) is extended and retracted to position the first probe body (636) above the material for detection.

7. The detection method according to claim 6, characterized in that The following steps are involved: Step 1: Preliminary screening and feeding, pouring the material to be tested into the vibrating feeder (12), starting the vibrating motor (122), receiving the material conveyed by the upwardly inclined end of the vibrating screen plate (121) through the conveying track (123), and conveying the material upward in a vibrating manner, and screening the material through the screening plate (125). When the material does not meet the standard or cannot be adjusted, it will fall into the vibrating screen plate (121) to be re-conveyed. After the material is adjusted by vibration and the screening plate (125), the material is conveyed from the inner side of the screening plate (125) to the side of the spacing adjustment plate (124), the spacing between the materials is adjusted, and the materials are respectively conveyed to the detection mechanism (2) through the conveying channel (3); Step 2: Appearance inspection, the material is transported by the conveyor belt (613), and the guide groove (614) plays a role of limiting and guiding the material to ensure the position and conveying direction of the material when it slides from the conveying channel (3), and the measuring mechanism (64) measures the material to measure the size and tolerance of the material, and at the same time measures the magnetic force on the surface of the material by the magnetic flux measuring needle (62), and adjusts the material by the induction needle (646) so that the material is on the same moving line; Step 3: Thickness detection, using the second thick film probe (65) to detect the thickness of the NdFeB permanent magnet material electroplating layer of the material, by adjusting the height of the second cylinder (652) and simultaneously cooperating with the extension of the second telescopic rod (653) to position the second probe body (655) above the material for simultaneous detection.

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