Fluorescent magnetic particle flaw detector for nondestructive testing of brake pad

Abstract

The invention relates to the technical field of magnetic particle inspection, and discloses a fluorescent magnetic particle inspection machine for nondestructive testing of brake linings, the fluorescent magnetic particle inspection machine comprises a fixed cylinder, a rear end plate and a front end plate are fixedly arranged on the inner sides of the two ends of the fixed cylinder respectively, and station windows A corresponding to a feeding station, a magnetizing station and an observation station are formed in the inner side of the rear end plate in an annular array manner; a station window B corresponding to the magnetizing station is formed in the inner side of the rear end plate; the rotating wheel is driven by external force to be rotationally arranged in the fixed cylinder; and the conveying cylinders are arranged on the inner side of the rotating wheel in a circumferential array mode and rotationally connected with the rotating wheel, and the conveying cylinders correspond to the station windows A and are used for sequentially conveying the internal brake pad bodies from the feeding station to the magnetizing station and the observation station. The fluorescent magnetic particle flaw detector for nondestructive testing of the brake pad can effectively solve the problem that in the prior art, unqualified brake pads cannot be conveniently and automatically sorted and discharged.

Description

Technical Field

[0001] This invention relates to the field of magnetic particle testing technology, and specifically to a fluorescent magnetic particle tester for non-destructive testing of brake pads. Background Technology

[0002] Magnetic particle testing involves magnetizing ferromagnetic workpieces, causing defects (cracks, folds, inclusions, etc.) inside or near the surface of the workpiece to generate a leakage magnetic field. This leakage magnetic field attracts magnetic powder or magnetic suspension applied to the workpiece surface, forming visible magnetic traces under ultraviolet light irradiation, thereby enabling the location, shape, and size determination of defects. Currently, in the manufacturing process of brake pads, it is necessary to detect minute defects such as cracks caused by machining and fatigue on the outer and near surfaces of the brake pad workpieces.

[0003] In related technologies, to improve the detection accuracy of magnetic particle testing on workpiece surfaces, for example, patent CN204556568U provides a brake disc fluorescent magnetic particle testing line. This testing line consists of a main unit, a fluorescent magnetic particle tester, a demagnetizer, a control power cabinet, a spray system, and a robotic arm system. The control power cabinet is connected to the main unit, the fluorescent magnetic particle tester, the demagnetizer, the spray system, and the robotic arm system via wires. It can detect micro-cracks near the surface of the workpiece caused by forging, fatigue, etc., as well as extremely minute defects such as slag inclusions, thus preventing the use of unqualified workpieces and avoiding the risks associated with using unqualified workpieces.

[0004] While the existing technical solutions described above can detect extremely minute defects such as near-surface microcracks and inclusions by employing a main unit, fluorescent magnetic particle flaw detector, demagnetizer, spray system, and robotic arm system, thus improving the accuracy of magnetic particle flaw detection on the workpiece surface, the robotic arm system, after transferring the workpiece from the magnetization mechanism to the observation mechanism, still needs to place the observed workpieces uniformly on a plate conveyor belt to transport them to the demagnetizer. For brake pad inspection, this means that brake pads that fail the inspection cannot be automatically separated, and manual sorting is still required to remove the unqualified brake pads. This not only involves high workload but also may result in missed picks, affecting the product qualification rate of brake pads. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides a fluorescent magnetic particle flaw detector for non-destructive testing of brake pads, which effectively solves the problem in existing technologies where it is inconvenient to automatically sort and unload brake pads that fail the test.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides a fluorescent magnetic particle flaw detector for non-destructive testing of brake pads, comprising:

[0008] A fixed cylinder, with a rear end plate and a front end plate fixedly installed on the inner sides of both ends of the fixed cylinder respectively. The inner side of the rear end plate is provided with a station window A in a circular array corresponding to the feeding station, the magnetizing station and the observation station. The inner side of the rear end plate is provided with a station window B corresponding to the magnetizing station.

[0009] A rotating wheel, driven by an external force, is located inside a fixed cylinder.

[0010] The conveying cylinders are arranged in a circumferential array inside the rotating wheel and are all rotatably connected to the rotating wheel. The conveying cylinders are arranged corresponding to the station window A and are used to convey the internal brake pad body from the feeding station to the magnetizing station and the observation station in sequence.

[0011] The observation components are located on the outside of the fixed cylinder, corresponding to the observation station.

[0012] The demagnetizing component is located below the observation component and is used to receive the gate plate body after testing;

[0013] The demagnetizing assembly includes a conveyor platform fixedly installed on the outside of the fixed cylinder. The inner side of the conveyor platform is provided with two conveyor belts driven by external force, which are used to convey qualified and unqualified brake pad bodies respectively. A demagnetizing coil is fixedly installed around the outer side of the conveyor platform.

[0014] Furthermore, the observation assembly includes a light shield for sealing the workstation window A. The light shield is driven by an external force to move along the axial direction of the conveyor cylinder. An insert plate is fixedly provided on the side of the light shield near the conveyor cylinder. A top recognition camera for observing damage to the top of the brake pad body is fixedly provided at the bottom of the insert plate.

[0015] A side recognition camera for observing side damage to the brake pad body is fixedly installed on the side of the light shield near the conveyor cylinder. An ultraviolet lamp is fixedly installed at the bottom of the insert plate for irradiating the top and side of the brake pad body. A feeding mechanism is also provided on the inner side of the light shield.

[0016] Furthermore, the feeding mechanism includes two right-angled support arms slidably disposed on the inner side of the light shield. The inner side of the light shield is provided with concave holes corresponding to the two right-angled support arms. The end of each right-angled support arm away from the brake plate body is fixedly provided with an electric slider A by a straight plate. Both electric sliders A are slidably disposed on the outer side of the guide rail B. The guide rail B is driven by external force to move along the axial direction of the light shield.

[0017] Furthermore, it also includes a material support assembly disposed inside the conveying cylinder. The material support assembly includes a box body fixedly disposed inside the conveying cylinder. A toothed column is rotatably disposed on the top of the box body via a bearing B. A detaching block is fixedly disposed on the top of the toothed column. Several bolts are fixedly disposed on the top of the detaching block.

[0018] Among them, at least two of the bolts are fixedly provided with limit pins corresponding to the round holes at their tops; a push plate is fixedly provided on the outer side of the guide rail B, and a toothed plate is fixedly provided on one side of the push plate. The toothed plate is driven by external force to mesh with the toothed column and is used to rotate the brake pad body during observation.

[0019] Furthermore, the toothed column is slidably disposed on the inner side of bearing B along the axial direction, a vertical rod is rotatably disposed at the bottom of the toothed column, a horizontal rod is fixedly disposed on the inner side of the vertical rod, a sliding plate is slidably disposed on the outer side of the horizontal rod, and a guide groove is opened on the inner side of the sliding plate corresponding to the horizontal rod. After the brake plate body rotates one revolution, the sliding plate is automatically triggered to perform a translational action by external force, which is used to drive the limit pin to disengage from the inside of the circular hole.

[0020] Furthermore, a frame is fixedly installed on the outside of the skateboard, the frame is located on the outside of the box body, a slide rod is fixedly installed on the side of the box body near the light shield, a spring A is installed on the outside of the slide rod, the spring A is located between the box body and the frame, a nut is threaded to the end of the slide rod, a connecting arm is fixedly installed on the side of the frame near the rear end plate, and a wedge-shaped locking block A is fixedly installed at the end of the connecting arm;

[0021] The inner side of the rear end plate is provided with a horizontal groove and a vertical groove for accommodating the locking assembly. The locking assembly includes a sliding member that is horizontally slidably disposed inside the horizontal groove and a wedge-shaped locking block B that is fixedly disposed outside the sliding member. The wedge-shaped locking block B is located in the forward direction of the wedge-shaped locking block A. A spring B is fixedly disposed on the side of the sliding member away from the wedge-shaped locking block B. The spring B is located inside the horizontal groove. The wedge-shaped locking block B and the wedge-shaped locking block A are engaged inside the vertical groove.

[0022] Furthermore, an annular cavity is formed on the inner side of the rotating wheel around the axis, a rotating shaft hole for rotatably connecting the conveying cylinder is formed on the inner side of the rotating wheel parallel to the axis, a central shaft hole for accommodating the spray assembly is formed on the inner side of the rotating wheel along the axial direction, a spray nozzle is formed on the side wall of the central shaft hole corresponding to the conveying cylinder, and a recovery port is formed on the side wall of the rotating wheel corresponding to the conveying cylinder.

[0023] A liquid storage tank is fixedly installed at the bottom of the fixed cylinder. The inside of the liquid storage tank is connected to the recovery port and is used to recover the magnetic suspension liquid inside the conveying cylinder.

[0024] Furthermore, the conveying cylinder is rotatably mounted inside the rotating shaft hole via the outer bearing A. Surrounding plates are fixedly mounted on the inner sides of both ends of the conveying cylinder. Spray holes are opened at the top of the conveying cylinder. A mounting platform for mounting the box is fixedly mounted on the bottom side inside the conveying cylinder. Grid holes are inclinedly arranged on both sides of the mounting platform at the bottom of the conveying cylinder. Filter plates are provided at the top of the grid holes. A counterweight is fixedly mounted on the vertical line of the conveying cylinder at the bottom of the mounting platform.

[0025] Furthermore, the spray assembly includes an end cap fixedly mounted on the outer side of the front end plate. A sliding sleeve is fixedly mounted on one side of the end cap. The sliding sleeve is slidably mounted inside the central shaft hole. A fixing plate is fixedly mounted inside the sliding sleeve. A pneumatic push rod D is vertically fixedly mounted inside the fixing plate. An adapter is fixedly mounted on the driving end of the pneumatic push rod D. A spray pipe is fixedly mounted at the bottom of the adapter. A flexible hose is fixedly mounted on the outer side of the adapter. The other end of the flexible hose is fixedly connected to the end cap and communicates with the inside of the liquid storage tank.

[0026] Furthermore, it also includes magnetization components corresponding to workstation windows A and B. The magnetization components include movable seats symmetrically arranged on both sides of the fixed cylinder. The movable seats move parallel to the axial direction of workstation window A. Limit plates are fixedly provided on the side of the movable seats that are close to each other. Magnetization coils are fixedly provided on the side of the limit plates that are close to each other. Cylinders A are fixedly provided inside the movable seats. The driving end of each cylinder A can be detachably provided with a clamp. The vertical surface of the clamp is in contact with the outer side of the brake plate body, and an electrode is fixedly provided in contact with the brake plate body.

[0027] The technical solution provided by this invention has the following advantages compared with the prior art:

[0028] (1) The present invention automatically observes and identifies the brake pad body inside the conveyor cylinder by setting an observation component, which improves the observation accuracy and efficiency. The observation component can take out the brake pad body after inspection and place the qualified and unqualified brake pad bodies on the top of the two conveyor belts according to the inspection results. The conveyor belt drives the brake pad body through the demagnetizing coil for demagnetization, so that the brake pad body can be automatically sorted according to the observation results after inspection, preventing errors from occurring after demagnetization and sorting.

[0029] (2) The present invention uses rotating wheels to drive conveyor cylinders arranged in a circular array to move between the loading station, magnetization station and observation station, which reduces the occupation of horizontal space due to horizontal conveying. Furthermore, each conveyor cylinder is used as an independent space in the magnetization station and the observation station, preventing interference with adjacent stations or the outside world.

[0030] (3) The present invention supports and conveys the brake plate body by setting up a material support component, so that the brake plate body can be rotated in conjunction with the observation component during observation, so as to achieve a comprehensive observation of the circumference of the brake plate body. After observation, the support height of the material support component can be changed in conjunction with the observation component, so that the brake plate body automatically falls on the unloading mechanism in the observation component, thus achieving the effect of automatic unloading after observation.

[0031] (4) The present invention can transport the brake plate body to different work stations by rotating the wheel to drive the conveying cylinder. After observing and unloading the brake plate body, when the conveying cylinder rotates under the drive of the rotating wheel, the conveying cylinder drive material support assembly is automatically reset before being transferred to the loading work station, so as to ensure the continuity of work.

[0032] (5) By opening an annular cavity inside the rotating wheel, the bottom of each conveying cylinder is connected to the liquid storage tank through the annular cavity, which prevents the magnetic suspension liquid attached to the surface of the conveying cylinder and the material support assembly from dripping to different places as the conveying position changes, which is beneficial for the unified recycling and treatment of the magnetic suspension liquid. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0034] Figure 1 This is a schematic diagram of one side of the overall structure of an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the structure on the other side of the overall embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the structure of one side of the rotating wheel in an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the structure on the other side of the rotating wheel in an embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram of the rotating wheel in an embodiment of the present invention;

[0039] Figure 6 This is a schematic diagram of the bottom structure of the conveying cylinder according to an embodiment of the present invention;

[0040] Figure 7 This is a cross-sectional view of the conveying cylinder according to an embodiment of the present invention;

[0041] Figure 8 This is a schematic diagram of the structure of the conveying cylinder and magnetization component according to an embodiment of the present invention;

[0042] Figure 9 This is a schematic diagram of the structure of the magnetization component and the material support component according to an embodiment of the present invention;

[0043] Figure 10 This is a schematic diagram of the structure of the conveying cylinder and the observation assembly according to an embodiment of the present invention;

[0044] Figure 11 This is a schematic diagram of the structure of the observation component and the material support component in an embodiment of the present invention;

[0045] Figure 12 This is a schematic diagram of the material support assembly and right-angle support arm according to an embodiment of the present invention;

[0046] Figure 13 This is a schematic diagram of the internal structure of the material support assembly according to an embodiment of the present invention;

[0047] Figure 14 This is a schematic diagram of the structure of the fixed cylinder back in an embodiment of the present invention;

[0048] Figure 15 This is a schematic diagram of the material support assembly and locking assembly according to an embodiment of the present invention;

[0049] Figure 16 This is a schematic diagram of the structure of the spray assembly according to an embodiment of the present invention;

[0050] Figure 17 for Figure 14 Enlarged structural diagram at point A;

[0051] Figure 18 for Figure 9 A magnified structural diagram at point B in the middle.

[0052] The labels in the diagram represent: 100, brake pad body; 101, round hole;

[0053] 1. Fixed cylinder; 11. Rear end plate; 111. Horizontal groove; 112. Vertical groove; 12. Front end plate; 13. Workstation window A; 14. Workstation window B; 15. Liquid storage tank; 16. Feed port; 17. Transfer pump; 18. Connecting pipe; 19. Cover plate;

[0054] 2. Rotating wheel; 21. Annular cavity; 22. Rotating shaft hole; 23. Recycling port; 24. Central shaft hole; 25. Spray nozzle; 26. Drive gear; 27. Motor A;

[0055] 3. Conveyor cylinder; 31. Bearing A; 32. Enclosure plate; 33. Spray hole; 34. Mounting platform; 35. Grid hole; 36. Filter plate; 37. Counterweight; 38. Through hole;

[0056] 4. Material support assembly; 41. Mounting plate; 42. Box body; 43. Bearing B; 44. Tooth column; 45. Detachment block; 46. Bolt; 47. Limit pin; 48. Vertical rod; 49. Horizontal rod; 410. Slide plate; 411. Guide groove; 412. Frame; 413. Connecting arm; 414. Slide rod; 415. Spring A; 416. Nut; 417. Wedge-shaped locking block A;

[0057] 5. Magnetizing assembly; 51. Movable base; 52. Guide rail A; 53. Mounting base; 54. Limiting plate; 55. Magnetizing coil; 56. Cylinder A; 57. Clamp; 58. Electrode;

[0058] 6. Observation Components; 61. Light-shielding Plate; 62. Insert Plate; 63. Top Recognition Camera; 64. Side Recognition Camera; 65. Ultraviolet Lamp; 66. Concave Hole; 67. Right-Angle Support Arm; 68. Straight Plate; 69. Electric Slider A; 610. Guide Rail B; 611. Push Plate; 612. Toothed Plate; 613. Pressure Rod; 614. Cylinder B; 615. Right-Angle Plate; 616. Vertical Plate; 617. Motor B; 618. Connecting Seat; 619. Cylinder C; 620. Electric Slider B; 621. Guide Rail C;

[0059] 7. Demagnetizing assembly; 71. Conveyor table; 72. Conveyor belt; 73. Demagnetizing coil;

[0060] 8. Spray assembly; 81. End cap; 82. Sliding sleeve; 83. Fixing plate; 84. Pneumatic push rod D; 85. Adapter; 86. Spray pipe; 87. Hose;

[0061] 9. Locking assembly; 91. Sliding element; 92. Spring B; 93. Wedge block B. Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0063] The present invention will be further described below with reference to embodiments.

[0064] Please see Figure 1 - Figure 18This invention provides a technical solution: a fluorescent magnetic particle flaw detector for non-destructive testing of brake pads, comprising a fixed cylinder 1, a rotating wheel 2, a conveying cylinder 3, an observation assembly 6, and a demagnetizing assembly 7. A rear end plate 11 and a front end plate 12 are fixedly installed on the inner sides of both ends of the fixed cylinder 1, respectively. A station window A13 is provided in a circular array on the inner side of the rear end plate 11 corresponding to the feeding station, the magnetizing station, and the observation station. A station window B14 is provided on the inner side of the rear end plate 11 corresponding to the magnetizing station. The rotating wheel 2 is driven to rotate inside the fixed cylinder 1 by an external force. A drive gear 26 is coaxially fixed on one side of the rotating wheel 2. A motor A27 is fixedly installed on the outer side of the fixed cylinder 1, and the drive end of the motor A27 is linked to the drive gear 26. The conveying cylinder... 3 are arranged in a circular array inside the rotating wheel 2 and are all rotatably connected to the rotating wheel 2. The conveying cylinder 3 is correspondingly arranged with the station window A13 and is used to convey the internal brake pad body 100 from the loading station to the magnetizing station and the observation station in sequence. The observation component 6 is arranged on the outside of the fixed cylinder 1 corresponding to the observation station. The demagnetizing component 7 is arranged below the observation component 6 and is used to receive the brake pad body 100 after testing. The demagnetizing component 7 includes a conveying platform 71 fixedly arranged on the outside of the fixed cylinder 1. The inner side of the conveying platform 71 is provided with two conveyor belts 72 driven by external force, which are used to convey qualified and unqualified brake pad bodies 100 respectively. A demagnetizing coil 73 is fixedly arranged around the outside of the conveying platform 71.

[0065] The rotating wheel 2 drives the conveyor cylinder 3, which is arranged in a circular array, to rotate. The conveyor cylinder 3 then drives the brake pad body 100 inside to pass through the loading station, magnetization station, and observation station in sequence. This allows for magnetization and fluorescence observation of the brake pad body 100 after loading. During observation, the observation component 6 on the outside of the fixed cylinder 1 is used to perform machine identification observation of the brake pad body 100 inside the conveyor cylinder 3. At this time, the conveyor cylinder 3 can be used as an independent darkroom in conjunction with the fluorescence system to perform non-destructive testing on the brake pad body 100. Furthermore, the brake pad body 100 can be removed after testing through the observation component 6. According to the test results, qualified and unqualified brake pad bodies 100 are placed on the top of two conveyor belts 72 respectively. The conveyor belts 72 then drive the brake pad body 100 through the demagnetizing coil 73 for demagnetization. This allows for automatic sorting of the brake pad bodies 100 after observation, preventing errors that may occur during sorting after demagnetization and ensuring the processing quality of the brake pad body 100.

[0066] To enable automatic observation of the brake plate body 100 inside the conveyor cylinder 3, the observation component 6 specifically includes a light shield 61 for sealing the station window A13. The light shield 61 is driven by an external force to move along the axial direction of the conveyor cylinder 3. An insert plate 62 is fixedly installed on the side of the light shield 61 near the conveyor cylinder 3. A top recognition camera 63 for observing top damage of the brake plate body 100 is fixedly installed at the bottom of the insert plate 62. A side recognition camera 64 for observing side damage of the brake plate body 100 is also fixedly installed on the side of the light shield 61 near the conveyor cylinder 3. An ultraviolet lamp 65 is fixedly installed at the bottom of the insert plate 62 for irradiating the top and side of the brake plate body 100. A feeding mechanism is also provided inside the light shield 61. When the magnetized brake plate body 100 is transferred to the observation station along with the conveyor cylinder 3, the light shield 61 is driven to move closer to the front end plate 12, so that the light shield 61 and the corresponding station window A13 are tightly attached to the outside of the front end plate 12 to block the external light. At this time, the light shield 61 drives the top recognition camera 63 at the bottom of the insert plate 62 to be above the brake plate body 100, and at the same time drives the side recognition camera 64 to be on the side of the brake plate body 100, and drives the ultraviolet lamp 65 at the bottom of the insert plate 62 to be diagonally above the brake plate body 100. At this time, the ultraviolet lamp 65 is located between the top recognition camera 63 and the side recognition camera 64, and can simultaneously irradiate the top and side of the brake plate body 100. When there are fluorescent cracks on the top or side of the brake plate body 100, the result can be immediately identified by the top recognition camera 63 or the side recognition camera 64, and then the unloading mechanism places the brake plate body 100 on the corresponding conveyor belt 72 for demagnetization and unloading according to the observation result.

[0067] Specifically, a right-angle plate 615 is fixedly installed on the outer side of the light-shielding plate 61. The right-angle plate 615 is rotatably installed on one side of the vertical plate 616. A motor B617 for driving the right-angle plate 615 to rotate is fixedly installed on the top of the vertical plate 616. The top of the vertical plate 616 is rotatably installed on one side of the connecting seat 618. A cylinder C619 is rotatably installed on the top of the connecting seat 618. The other end of the cylinder C619 is rotatably installed on the outer side of the vertical plate 616 for driving the light-shielding plate 61 to tilt and discharge material towards the top of the conveyor belt 72. An electric slider B620 is fixedly installed at the bottom of the connecting seat 618. The electric slider B620 is slidably installed on the outer side of the guide rail C621. The guide rail C621 is fixedly installed on the outer side of the front end plate 12. Then, at the start of observation, the electric slider B620 moves linearly along the guide rail C621, causing the electric slider B620 to drive the connecting seat 618 and the vertical plate 616 to move horizontally, which in turn drives the light-shielding plate 61 on the outside of the right-angle plate 615 to move along the axis of the workstation window A13; after the unloading mechanism receives the brake plate body 100 inside the conveyor cylinder 3, the electric slider B620 drives the light-shielding plate 61, the unloading mechanism, and the brake plate body 100 to move away along the axial direction of the conveyor cylinder 3, and finally removes the observed brake plate body 100 from the conveyor. Inside cylinder 3, the right-angle plate 615 is driven to rotate by motor B617, causing the right-angle plate 615 to drive the light-shielding plate 61 and the feeding mechanism to rotate to an angle parallel to the conveyor belt 72. Finally, the light-shielding plate 61 and the feeding mechanism are moved above the corresponding conveyor belt 72 by electric slider B620, and then the vertical plate 616 is driven to tilt downward by cylinder C619, which can drive the light-shielding plate 61 and the feeding mechanism to tilt towards the top of the conveyor belt 72, so that the brake plate body 100 tilts and slides downward under the support of the feeding mechanism to transfer to the top of the conveyor belt 72.

[0068] To facilitate the removal and unloading of the brake plate body 100 after observation, the unloading mechanism includes two right-angled support arms 67 slidably disposed on the inner side of the light shield 61. The inner side of the light shield 61 is provided with concave holes 66 corresponding to the two right-angled support arms 67. The ends of the right-angled support arms 67 away from the brake plate body 100 are each fixedly provided with electric sliders A69 through straight plates 68. The two electric sliders A69 are slidably disposed on the outer side of the guide rail B610. The guide rail B610 is driven by external force to move along the axial direction of the light shield 61. When the light shield 61 is against the outside of the front plate 12, the light shield 61 simultaneously drives the two right-angle support arms 67, which are slidably arranged on the inside, to extend into the inside of the conveying cylinder 3. At this time, the two right-angle support arms 67 are at their farthest distance to prevent interference with the observation of the brake plate body 100. After the observation of the brake plate body 100 is completed, the guide rail B610 is driven to move closer to the light shield 61, so that the guide rail B610 pushes the right-angle support arms 67 along the concave hole 66 into the inside of the conveying cylinder 3 through the straight plate 68. After the right-angle support arms 67 pass through the concave hole 66, the electric slider A69 is controlled to move closer to each other along the guide rail B610, so that the electric slider A69 drives the straight plate 68 to slide inside the concave hole 66, thereby driving the two right-angle support arms 67 inside the conveying cylinder 3 to move closer to both sides of the brake plate body 100. At this time, the distance between the bottoms of the right-angle support arms 67 is less than the width of the brake plate body 100, so as to lift the brake plate body 100 for unloading.

[0069] To enable comprehensive observation of the brake pad body 100, a material support assembly 4 is also included inside the conveying cylinder 3. The material support assembly 4 includes a box 42 fixedly installed inside the conveying cylinder 3. A toothed column 44 is rotatably installed on the top of the box 42 via a bearing B43. A release block 45 is fixedly installed on the top of the toothed column 44. Several bolts 46 are fixedly installed on the top of the release block 45. At least two bolts 46 are fixedly provided with limit pins 47 corresponding to the round holes 101. A push plate 611 is fixedly installed on the outside of the guide rail B610. A toothed plate 612 is fixedly installed on one side of the push plate 611. The toothed plate 612 is driven by the push plate 611 and meshes with the toothed column 44 to rotate the brake pad body 100 during observation. A cylinder B614 is fixedly installed on the inside of the push plate 611. The drive end of the cylinder B614 is fixedly installed on the outside of the light shield 61.

[0070] After the light shield 61 drives the top recognition camera 63 and the side recognition camera 64 into place, the cylinder B614 drives the push plate 611 to move closer to the light shield 61, so that the push plate 611 drives the right-angle support arm 67 to continue to extend into the conveying cylinder 3. At the same time, the push plate 611 pushes the toothed plate 612 to mesh with the toothed column 44, so that the toothed column 44 rotates on the top of the box 42 through the bearing B43, thereby driving the brake plate body 100 on the top of the release block 45 to rotate, so that the brake plate body 100 cooperates with the side recognition camera 64 to conduct a comprehensive observation of the side during the rotation.

[0071] After the brake pad body 100 has been fully inspected, in order to facilitate the right-angle support arm 67 to lift the brake pad body 100 for unloading, the toothed column 44 is slidably disposed on the inner side of the bearing B43 along the axial direction. A vertical rod 48 is rotatably disposed at the bottom of the toothed column 44. A horizontal rod 49 is fixedly disposed on the inner side of the vertical rod 48. A sliding plate 410 is slidably disposed on the outer side of the horizontal rod 49. A guide groove 411 is opened on the inner side of the sliding plate 410 corresponding to the horizontal rod 49. After the brake pad body 100 rotates one revolution, the sliding plate 410 is automatically triggered to perform a translational movement driven by external force, which is used to drive the limit pin 47 to disengage from the round hole 101.

[0072] Specifically, a frame 412 is fixedly installed on the outer side of the slide plate 410, and the frame 412 is located on the outer side of the box body 42. A slide rod 414 is fixedly installed on the side of the box body 42 near the light shield 61. A spring A415 is installed on the outer side of the slide rod 414, and the spring A415 is located between the box body 42 and the frame 412. A nut 416 is threadedly connected to the end of the slide rod 414. A connecting arm 413 is fixedly installed on the side of the frame 412 near the rear end plate 11. A wedge-shaped locking block A417 is fixedly installed at the end of the connecting arm 413. A transverse groove 1 for accommodating the locking assembly 9 is opened on the inner side of the rear end plate 11. The locking assembly 9 includes a sliding member 91 that is horizontally slidably disposed inside the transverse groove 111 and a wedge-shaped block B93 that is fixedly disposed outside the sliding member 91. The wedge-shaped block B93 is located in the forward direction of the wedge-shaped block A417. A spring B92 is fixedly disposed on the side of the sliding member 91 away from the wedge-shaped block B93. The spring B92 is located inside the transverse groove 111. The wedge-shaped block B93 and the wedge-shaped block A417 are engaged inside the vertical groove 112. A cover plate 19 for sealing the transverse groove 111 and the vertical groove 112 is fixedly disposed on the outer side of the rear end plate 11.

[0073] In fact, a pressure rod 613 is fixedly installed on the outside of the push plate 611. The pressure rod 613 is slidably installed on the inside of the light shield 61. After the brake plate body 100 rotates one revolution to complete the observation work, it means that the tooth segment of the tooth plate 612 has passed the tooth column 44 (that is, the tooth plate 612 cannot drive the tooth column 44 to rotate if it continues to move forward). At this time, after the right-angle support arm 67 is adjusted by driving the electric slider A69, the push plate 611 continues to push the pressure rod 613 forward, so that the pressure rod 613 begins to push the frame 412, and also pushes the spring A415 on the outside of the slide rod 414. Compression is performed. At this time, the frame 412 drives the slide plate 410 to slide inside the box 42, so that the slide plate 410 presses down the horizontal bar 49 through the guide groove 411, and then pulls down the tooth column 44 through the vertical bar 48 to slide along the axis inside the bearing B43, so that the limiting pin 47 at the top of the release block 45 disengages from the inside of the round hole 101, and then automatically releases the support on the brake plate body 100 after the observation is completed, so that the brake plate body 100 slowly falls between the two right-angle support arms 67, so that the right-angle support arms 67 support the brake plate body 100 in a stable feeding posture; Then, the right-angle support arm 67 and the brake plate body 100 are moved outward from the conveying cylinder 3 by the light shield 61 to feed the material. At this time, the pressure rod 613 gradually releases the pressure on the frame 412. In order to prevent the spring A415 from driving the frame 412 to slide in the opposite direction and causing the limit pin 47 to reset, when the frame 412 moves forward, the frame 412 pushes the wedge-shaped block A417 closer to the rear end plate 11 through the connecting arm 413, so that the wedge-shaped block A417 squeezes the wedge-shaped block B93 to slide along the transverse groove 111 and compresses the spring B92, and finally the wedge-shaped block B93 slides along the transverse groove 111. The locking block B93 and the wedge-shaped locking block A417 are engaged inside the vertical groove 112, which prevents the limit pin 47 from automatically resetting before the brake plate body 100 is unloaded, thus preventing interference during unloading. When the rotating wheel 2 drives the conveyor cylinder 3 to rotate, the conveyor cylinder 3 drives the wedge-shaped locking block A417 to slide obliquely upward to the outside of the wedge-shaped locking block B93, thereby automatically releasing the engagement action between the wedge-shaped locking block A417 and the wedge-shaped locking block B93. This allows the wedge-shaped locking block A417 to automatically reset to its initial state after unloading and before loading, ensuring the continuity of loading and unloading operations.

[0074] Based on the above embodiments, in order to facilitate the spraying of the magnetic suspension into the conveying cylinder 3 and its subsequent recovery, specifically, an annular cavity 21 is formed around the axis on the inner side of the rotating wheel 2, a rotating shaft hole 22 for rotatably connecting the conveying cylinder 3 is formed parallel to the axis on the inner side of the rotating wheel 2, a central shaft hole 24 for accommodating the spraying assembly 8 is formed along the axial direction on the inner side of the rotating wheel 2, a spray nozzle 25 is formed on the side wall of the central shaft hole 24 corresponding to the conveying cylinder 3, and a recovery port 23 is formed on the side wall of the rotating wheel 2 corresponding to the conveying cylinder 3; a liquid storage tank 15 is fixedly installed at the bottom of the fixed cylinder 1, and the interior of the liquid storage tank 15 is connected to the recovery port 23 for recovering the magnetic suspension inside the conveying cylinder 3. The conveying cylinder 3 is rotatably mounted inside the rotating shaft hole 22 via the outer bearing A31. Both ends of the conveying cylinder 3 are fixedly mounted with a surrounding plate 32. The inner side of the surrounding plate 32 is provided with a through hole 38 corresponding to the wedge-shaped locking block A417. The top of the conveying cylinder 3 is provided with a spray hole 33. The bottom of the conveying cylinder 3 is fixedly mounted with a mounting platform 34 for mounting the box body 42. The box body 42 is fixedly connected to the mounting platform 34 via the bottom mounting plate 41. The bottom of the conveying cylinder 3 is provided with grid holes 35 on both sides of the mounting platform 34. The top of the grid holes 35 is provided with a filter plate 36. The bottom of the mounting platform 34 is fixedly mounted with a counterweight 37 on the vertical line of the conveying cylinder 3.

[0075] When the rotating wheel 2 drives the conveyor cylinder 3 to move between the loading station, the magnetizing station, and the observation station, the counterweight 37 ensures that the material support assembly 4 inside the conveyor cylinder 3 remains horizontal, thus guaranteeing the conveying stability of the brake pad body 100. Furthermore, when the conveyor cylinder 3 is in the magnetizing station, the spray holes 33 at the top of the conveyor cylinder 3 align with the spray nozzles 25 on the side wall of the central shaft hole 24, allowing the spray assembly 8 inside the central shaft hole 24 to spray magnetic suspension liquid into the conveyor cylinder 3 in the magnetizing station, while excess liquid is sprayed away. The magnetic suspension is filtered by the filter plates 36 on both sides of the mounting platform 34 and then discharged downward through the grid holes 35. The discharged magnetic suspension eventually enters the interior of the storage tank 15 through the recovery port 23 on the side wall of the rotating wheel 2 for recycling. The annular cavity 21 opened on the inner side of the rotating wheel 2 allows the bottom of each conveying cylinder 3 to be connected to the storage tank 15 through the annular cavity 21, preventing the magnetic suspension adhering to the surface of the conveying cylinder 3 and the material support assembly 4 from dripping to different places as the conveying position changes, which is conducive to the unified recycling and treatment of the magnetic suspension.

[0076] To enable the spray assembly 8 to spray magnetic suspension liquid onto the brake pad body 100 at the magnetization position, the spray assembly 8 includes an end cap 81 fixedly installed on the outside of the front end plate 12. A sliding sleeve 82 is fixedly installed on one side of the end cap 81. The sliding sleeve 82 is slidably installed inside the central shaft hole 24. A fixing plate 83 is fixedly installed inside the sliding sleeve 82. A pneumatic push rod D84 is vertically fixedly installed inside the fixing plate 83. An adapter 85 is fixedly installed at the drive end of the pneumatic push rod D84. A spray pipe 86 is fixedly installed at the bottom of the adapter 85. A hose 87 is fixedly installed on the outside of the adapter 85. The other end of the hose 87 is fixedly connected to the end cap 81 and communicates with the inside of the liquid storage tank 15.

[0077] When spraying the magnetic suspension, the pneumatic push rod D84 drives the adapter 85 to move downwards, passing through the spray nozzle 25 and spray hole 33 in sequence, so that the output end of the spray pipe 86 is close to the brake plate body 100 for spraying. At this time, the hose 87 located inside the sliding sleeve 82 is pulled as the adapter 85 moves downwards to compensate for the change in length. During the rotation of the rotating wheel 2, the sliding sleeve 82 located inside the rotating wheel 2 is fixed to the front end plate 12 by the end cap 81, so that the rotating wheel 2 rotates outside the sliding sleeve 82 to prevent interference with the operation of the rotating wheel 2 and the spray assembly 8. Specifically, during spraying, the magnetic suspension is drawn out by the delivery pump 17 on the side wall of the storage tank 15 and input into the interior of the connecting pipe 18, and then input into the hose 87 for use through the connecting pipe 18. A feeding port 16 is provided on the outside of the storage tank 15 to facilitate the addition of materials by the staff.

[0078] To meet the magnetization requirements of the brake pad body 100, a magnetization assembly 5 is also included, corresponding to the work station windows A13 and B14. The magnetization assembly 5 includes movable seats 51 symmetrically arranged on both sides of the fixed cylinder 1. The movable seats 51 slide along the guide rail A52, which is fixed to the outer side of the rear end plate 11 and the front end plate 12 via mounting base 53. The guide rail A52 is parallel to the axial direction of the work station window A13. Limit plates 54 are fixedly installed on the adjacent sides of the movable seats 51, and magnetization coils 55 are fixedly installed on the adjacent sides of the limit plates 54. Cylinders A56 are fixedly installed inside each movable seat 51. Clamps 57 are detachably installed on the drive ends of the cylinders A56. The vertical surface of the clamps 57 is in contact with the outer side of the brake pad body 100, and electrodes 58 are fixedly installed in contact with the brake pad body 100. When the conveying cylinder... When the brake plate body 100 at the top of the material support assembly 4 is in the magnetized position, the movable seats 51 on both sides are controlled to move along the guide rail A52, so that the movable seats 51 drive the two magnetizing coils 55 to be located on both sides of the brake plate body 100. Then, the cylinder A56 drives the two clamps 57 to approach and clamp the brake plate body 100, thereby clamping the two electrodes 58 on the outside of the brake plate body 100. At this time, according to the structural characteristics of the brake plate body 100, clamping magnetization is used in the circumferential direction, and magnetic yoke coil induction method is used in the longitudinal direction to perform composite magnetization on the brake plate body 100, so that the magnetic lines of force rotate. Thus, a single flaw detection can check the surface and near surface of the brake plate body 100 for minor defects such as cracks, folds and slag inclusions caused by forging, quenching, grinding and fatigue. The magnetizing current is adjustable, and it has the advantages of low working noise and reliable performance.

[0079] This application describes the operating principle of a fluorescent magnetic particle flaw detector used for non-destructive testing of brake pads:

[0080] First, the brake pad body 100 to be tested is placed inside the conveying cylinder 3 through the station window A13 on the feeding station. The brake pad body 100 is supported by the release block 45 inside the conveying cylinder 3. At least two limit pins 47 are provided on the top of the release block 45, which correspond to the round holes 101 on the inner side of the brake pad body 100. They have a positioning function for the brake pad body 100 placed on the top of the release block 45, preventing the brake pad body 100 from shifting significantly during the conveying process. Then, the motor A27 on the outside of the rear end plate 11 is started by the external control system, so that the motor A27 drives the rotating wheel 2 to rotate a certain angle inside the fixed cylinder 1, thereby conveying the brake pad body 100 to the magnetizing station. At this time, the next conveying cylinder 3 is located at the feeding station, realizing continuous feeding and conveying.

[0081] Then, by controlling the movable seats 51 on both sides to move along the guide rail A52, the movable seats 51 drive the two magnetizing coils 55 to be located on both sides of the brake plate body 100. Then, the cylinder A56 drives the two clamps 57 to approach and clamp the brake plate body 100, thereby clamping the two electrodes 58 on the outside of the brake plate body 100. At this time, according to the structural characteristics of the brake plate body 100, clamping magnetization is used in the circumferential direction, and magnetic yoke coil induction method is used in the longitudinal direction to perform composite magnetization on the brake plate body 100, so that the magnetic lines of force rotate. During the magnetization process, the magnetic suspension is drawn out by the delivery pump 17 on the side wall of the storage tank 15 and transported. The magnetic suspension enters the interior of the connecting pipe 18 and is fed into the hose 87 for use. Then, the pneumatic push rod D84 drives the adapter 85 to move downward, passing through the spray nozzle 25 and spray hole 33 in sequence, so that the output end of the spray pipe 86 is close to the brake plate body 100 for spraying. Excess magnetic suspension is filtered by the filter plates 36 on both sides of the mounting platform 34 and discharged downward through the grid holes 35. The discharged magnetic suspension finally enters the interior of the storage tank 15 for recycling through the recovery port 23 on the side wall of the rotating wheel 2. After being magnetized, the brake plate body 100 is then transported to the observation station by the rotating wheel 2 driving the conveyor cylinder 3 to rotate.

[0082] At the start of observation, the electric slider B620 moves linearly along the guide rail C621, causing the connecting seat 618 and the vertical plate 616 to move horizontally. This, in turn, moves the light-shielding plate 61 on the outside of the right-angle plate 615 along the axis of the workstation window A13, so that the light-shielding plate 61 is in close contact with the outside of the front end plate 12, blocking external light. When the light-shielding plate 61 is in contact with the outside of the front end plate 12, it simultaneously drives the two right-angle support arms 67, which are slidably mounted on the inside, to extend into the conveyor cylinder 3. At this time, the two right-angle support arms 67 are at their farthest distance, preventing interference with the observation of the brake plate body 100. At this time, the light-shielding plate 61 moves the top recognition camera 63 at the bottom of the insert plate 62 above the brake plate body 100, and simultaneously moves the side recognition camera 64 to the side of the brake plate body 100, and moves the ultraviolet lamp 65 at the bottom of the insert plate 62 to the side of the brake plate body 100. The ultraviolet lamp 65 is positioned diagonally above the main body 100, between the top recognition camera 63 and the side recognition camera 64, which can simultaneously irradiate the top and side of the main body 100. After the light shield 61 drives the top recognition camera 63 and the side recognition camera 64 into place, the cylinder B614 drives the push plate 611 to move closer to the light shield 61, so that the push plate 611 drives the right-angle support arm 67 to continue to extend into the conveying cylinder 3. At the same time, the push plate 611 pushes the toothed plate 612 to mesh with the toothed column 44, so that the toothed column 44 rotates on the top of the box 42 through the bearing B43, thereby driving the main body 100 of the de-block 45 to rotate. During the rotation, the main body 100 cooperates with the side recognition camera 64 to conduct a comprehensive observation of the side. When there are fluorescent cracks on the top or side of the main body 100, the result can be immediately identified by the top recognition camera 63 or the side recognition camera 64.

[0083] After the brake plate body 100 is observed, the guide rail B610 moves closer to the light shield 61, causing the guide rail B610 to push the right-angle support arm 67 along the concave hole 66 into the conveying cylinder 3 via the straight plate 68. After the right-angle support arm 67 passes the concave hole 66, the electric slider A69 is controlled to move closer to each other along the guide rail B610, causing the electric slider A69 to drive the straight plate 68 to slide inside the concave hole 66, thereby driving the two right-angle support arms 67 inside the conveying cylinder 3 to move closer to both sides of the brake plate body 100. At this time, the distance between the bottoms of the right-angle support arms 67 is less than the width of the brake plate body 100, preparing to lift the brake plate body 100 for unloading; then the electric slider B620 drives the light shield 61... The feeding mechanism and the brake plate body 100 are moved away along the axial direction of the conveyor cylinder 3, and finally the observed brake plate body 100 is moved out of the interior of the conveyor cylinder 3. Then, the right angle plate 615 is driven to rotate by the motor B617, so that the right angle plate 615 drives the light shield 61 and the feeding mechanism to rotate to an angle parallel to the conveyor belt 72. Finally, the light shield 61 and the feeding mechanism are moved to the corresponding conveyor belt 72 by the electric slider B620. Then, the vertical plate 616 is driven to tilt downward by the cylinder C619, so that the light shield 61 and the feeding mechanism can tilt towards the top of the conveyor belt 72. The brake plate body 100 is tilted and slid downward under the support of the feeding mechanism and transferred to the top of the conveyor belt 72, thus completing the effect of automatic sorting and feeding after observation.

[0084] In practical applications, after the brake pad body 100 completes one rotation for observation, it means that the tooth segment of the toothed plate 612 has passed the toothed column 44. At this time, after the right-angle support arm 67 is adjusted by the electric slider A69, the push plate 611 continues to push the pressure rod 613 forward, causing the pressure rod 613 to start pushing the frame 412 and compressing the spring A415 on the outside of the slide rod 414. At this time, the frame 412 drives the slide plate 410 to slide inside the housing 42, allowing the slide plate 410 to pass through the guide groove 41. 1. Press down the horizontal bar 49, and then pull down the toothed column 44 through the vertical bar 48 to slide axially along the inner side of the bearing B43, so that the limiting pin 47 at the top of the release block 45 disengages from the inside of the round hole 101. Then, after the observation is completed, the support on the brake plate body 100 is automatically released, so that the brake plate body 100 slowly falls between the two right-angle support arms 67, so that the right-angle support arms 67 support the brake plate body 100 in a stable feeding posture; then, the light shield 61 drives the right-angle support arms 67 and the brake plate body 100 to the conveyor. As the feeding cylinder 3 moves externally to unload material, the pressure rod 613 gradually releases pressure on the frame 412. To prevent the spring A415 from driving the frame 412 to slide in the opposite direction and causing the limit pin 47 to reset, as the frame 412 moves forward, the frame 412 pushes the wedge-shaped block A417 closer to the rear end plate 11 via the connecting arm 413. This causes the wedge-shaped block A417 to squeeze the wedge-shaped block B93 to slide along the transverse groove 111 and compress the spring B92. Finally, the wedge-shaped block B93 and the wedge-shaped block A417... Positioned in a locking posture inside the vertical groove 112, this prevents the limit pin 47 from automatically resetting before the brake plate body 100 is unloaded, thus avoiding interference during unloading. When the rotating wheel 2 drives the conveyor cylinder 3 to rotate, the conveyor cylinder 3 drives the wedge-shaped locking block A417 to slide obliquely upwards and outwards from the wedge-shaped locking block B93, thereby automatically releasing the locking action between the wedge-shaped locking block A417 and the wedge-shaped locking block B93. This allows the wedge-shaped locking block A417 to automatically reset to its initial state after unloading and before loading, ensuring the continuity of unloading and loading operations.

[0085] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fluorescent magnetic particle flaw detector for non-destructive testing of brake pads, characterized in that, include: A fixed cylinder (1) is provided with a rear end plate (11) and a front end plate (12) respectively fixed on the inner sides of both ends of the fixed cylinder (1). The inner side of the rear end plate (11) is provided with a station window A (13) in a circular array corresponding to the feeding station, the magnetizing station and the observation station. The inner side of the rear end plate (11) is provided with a station window B (14) corresponding to the magnetizing station. The rotating wheel (2) is driven to rotate by external force and is located inside the fixed cylinder (1); The conveying cylinder (3) is arranged in a circular array inside the rotating wheel (2) and is rotatably connected to the rotating wheel (2). The conveying cylinder (3) is arranged correspondingly to the work station window A (13) and is used to convey the internal brake plate body (100) from the loading station to the magnetizing station and the observation station in sequence. The observation component (6) is located on the outside of the fixed cylinder (1) corresponding to the observation station; The demagnetizing component (7) is located below the observation component (6) and is used to receive the gate plate body (100) after detection. The demagnetizing assembly (7) includes a conveyor platform (71) fixedly installed on the outside of the fixed cylinder (1). The inner side of the conveyor platform (71) is provided with two conveyor belts (72) driven by external force, which are used to convey qualified and unqualified brake pad bodies (100) respectively. A demagnetizing coil (73) is fixedly installed around the outside of the conveyor platform (71).

2. The fluorescent magnetic particle flaw detector for non-destructive testing of brake pads according to claim 1, characterized in that: The observation assembly (6) includes a light shield (61) for sealing the work station window A (13). The light shield (61) is driven by an external force to move along the axial direction of the conveyor cylinder (3). An insert plate (62) is fixedly provided on the side of the light shield (61) near the conveyor cylinder (3). A top recognition camera (63) for observing the top damage of the brake pad body (100) is fixedly provided at the bottom of the insert plate (62). A side recognition camera (64) for observing side damage to the brake pad body (100) is fixedly installed on the side of the light shield (61) near the conveyor cylinder (3). An ultraviolet lamp (65) is fixedly installed at the bottom of the insert plate (62) for irradiating the top and side of the brake pad body (100). A feeding mechanism is also provided inside the light shield (61).

3. A fluorescent magnetic particle flaw detector for non-destructive testing of brake pads according to claim 2, characterized in that: The feeding mechanism includes two right-angled support arms (67) slidably disposed on the inner side of the light shield (61). The inner side of the light shield (61) is provided with concave holes (66) corresponding to the two right-angled support arms (67). The end of each right-angled support arm (67) away from the brake plate body (100) is fixedly provided with an electric slider A (69) through a straight plate (68). Both electric sliders A (69) are slidably disposed on the outer side of the guide rail B (610). The guide rail B (610) is driven by external force to move along the axial direction of the light shield (61).

4. A fluorescent magnetic particle flaw detector for non-destructive testing of brake pads according to claim 3, characterized in that: It also includes a material support assembly (4) disposed inside the conveying cylinder (3). The material support assembly (4) includes a box body (42) fixedly disposed inside the conveying cylinder (3). A toothed column (44) is rotatably disposed on the top of the box body (42) via a bearing B (43). A stripper block (45) is fixedly disposed on the top of the toothed column (44). Several bolts (46) are fixedly disposed on the top of the stripper block (45). Among them, at least two of the bolts (46) are fixedly provided with limit pins (47) corresponding to the round holes (101) at the top; a push plate (611) is fixedly provided on the outside of the guide rail B (610), and a toothed plate (612) is fixedly provided on one side of the push plate (611). The toothed plate (612) is driven by external force to mesh with the toothed column (44) for rotating the brake pad body (100) during observation.

5. A fluorescent magnetic particle flaw detector for non-destructive testing of brake pads according to claim 4, characterized in that: The toothed column (44) is slidably disposed on the inner side of bearing B (43) along the axial direction. A vertical rod (48) is rotatably disposed at the bottom of the toothed column (44). A horizontal rod (49) is fixedly disposed on the inner side of the vertical rod (48). A sliding plate (410) is slidably disposed on the outer side of the horizontal rod (49). A guide groove (411) is opened on the inner side of the sliding plate (410) corresponding to the horizontal rod (49). After the brake pad body (100) rotates one revolution, the sliding plate (410) is automatically triggered to perform a translational movement by external force, which is used to drive the limit pin (47) to disengage from the round hole (101).

6. A fluorescent magnetic particle flaw detector for non-destructive testing of brake pads according to claim 5, characterized in that: A frame (412) is fixedly installed on the outside of the slide plate (410). The frame (412) is located on the outside of the box body (42). A slide rod (414) is fixedly installed on the side of the box body (42) near the light shield (61). A spring A (415) is installed on the outside of the slide rod (414). The spring A (415) is located between the box body (42) and the frame (412). A nut (416) is threaded to the end of the slide rod (414). A connecting arm (413) is fixedly installed on the side of the frame (412) near the rear end plate (11). A wedge-shaped locking block A (417) is fixedly installed at the end of the connecting arm (413). The rear end plate (11) has a horizontal groove (111) and a vertical groove (112) for accommodating the locking assembly (9) on its inner side. The locking assembly (9) includes a sliding member (91) that is horizontally slidably disposed inside the horizontal groove (111) and a wedge-shaped block B (93) that is fixedly disposed outside the sliding member (91). The wedge-shaped block B (93) is located in the forward direction of the wedge-shaped block A (417). A spring B (92) is fixedly disposed on the side of the sliding member (91) away from the wedge-shaped block B (93). The spring B (92) is located inside the horizontal groove (111). The wedge-shaped block B (93) and the wedge-shaped block A (417) are engaged inside the vertical groove (112).

7. A fluorescent magnetic particle flaw detector for non-destructive testing of brake pads according to claim 4, characterized in that: The inner side of the rotating wheel (2) has an annular cavity (21) around the axis. The inner side of the rotating wheel (2) has a rotating shaft hole (22) parallel to the axis for rotatably connecting the conveying cylinder (3). The inner side of the rotating wheel (2) has a central shaft hole (24) along the axial direction for accommodating the spray assembly (8). The side wall of the central shaft hole (24) has a spray nozzle (25) corresponding to the conveying cylinder (3). The side wall of the rotating wheel (2) has a recovery port (23) corresponding to the conveying cylinder (3). A liquid storage tank (15) is fixedly installed at the bottom of the fixed cylinder (1). The inside of the liquid storage tank (15) is connected to the recovery port (23) for recovering the magnetic suspension liquid inside the conveying cylinder (3).

8. A fluorescent magnetic particle flaw detector for non-destructive testing of brake pads according to claim 7, characterized in that: The conveying cylinder (3) is rotatably mounted inside the rotating shaft hole (22) via the outer bearing A (31). The inner sides of both ends of the conveying cylinder (3) are fixedly provided with a surrounding plate (32). The top of the conveying cylinder (3) is provided with a spray hole (33). The bottom side inside the conveying cylinder (3) is fixedly provided with a mounting platform (34) for mounting the box body (42). The bottom of the conveying cylinder (3) is provided with grid holes (35) on both sides of the mounting platform (34). The top of the grid holes (35) is provided with a filter plate (36). The bottom of the mounting platform (34) is fixedly provided with a counterweight (37) on the vertical line of the conveying cylinder (3).

9. A fluorescent magnetic particle flaw detector for non-destructive testing of brake pads according to claim 8, characterized in that: The spray assembly (8) includes an end cap (81) fixedly disposed on the outside of the front end plate (12). A sliding sleeve (82) is fixedly disposed on one side of the end cap (81). The sliding sleeve (82) is slidably disposed inside the central shaft hole (24). A fixing plate (83) is fixedly disposed inside the sliding sleeve (82). A pneumatic push rod D (84) is vertically fixedly disposed inside the fixing plate (83). An adapter (85) is fixedly disposed at the driving end of the pneumatic push rod D (84). A spray pipe (86) is fixedly disposed at the bottom of the adapter (85). A hose (87) is fixedly disposed on the outside of the adapter (85). The other end of the hose (87) is fixedly connected to the end cap (81) and communicates with the inside of the liquid storage tank (15).

10. A fluorescent magnetic particle flaw detector for non-destructive testing of brake pads according to claim 4, characterized in that: It also includes magnetization components (5) corresponding to work station windows A (13) and B (14). The magnetization components (5) include movable seats (51) symmetrically arranged on both sides of the fixed cylinder (1). The movable seats (51) move parallel to the axial direction of work station window A (13). Limiting plates (54) are fixedly provided on the side of the movable seats (51) that are close to each other. Magnetization coils (55) are fixedly provided on the side of the limiting plates (54) that are close to each other. Cylinders A (56) are fixedly provided on the inner side of the movable seats (51). Clamps (57) are detachably provided on the driving end of cylinders A (56). The vertical surface of the clamps (57) is attached to the outer side of the brake plate body (100), and electrodes (58) are fixedly provided on the brake plate body (100).

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