A magnetic particle inspection cleaning machine for ring-shaped parts

By integrating flaw detection, cleaning, and protection into a single magnetic particle flaw detection and cleaning machine, the problems of insufficient accuracy and low efficiency of traditional equipment in the inspection of large ring parts have been solved. It realizes a highly efficient and automated inspection and cleaning process, and is suitable for the mass production of ring parts of various specifications.

CN224594565UActive Publication Date: 2026-08-04YANCHENG DONGCHE TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
YANCHENG DONGCHE TECH CO LTD
Filing Date
2025-08-26
Publication Date
2026-08-04

AI Technical Summary

Technical Problem

Traditional magnetic particle testing equipment suffers from problems such as insufficient testing accuracy, dispersed equipment, disconnect between processes, high labor intensity, and large space occupation when inspecting large ring-shaped parts, making it difficult to meet the needs of mass production.

Method used

A magnetic particle inspection and cleaning machine integrating flaw detection, cleaning and protection was designed. It adopts a flipping mechanism, magnetization device, cleaning device and rinsing device. Through closed-circuit magnetic yoke and closed cleaning chamber, it realizes the automated detection and cleaning of ring parts, reduces transfer time and improves flaw detection accuracy and efficiency.

Benefits of technology

It enables efficient and accurate detection and cleaning of ring-shaped parts, reduces labor intensity, improves automation, adapts to the detection needs of ring-shaped parts of various specifications, and saves installation space.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model provides a magnetic particle inspection and cleaning machine for ring-shaped parts, including a tilting mechanism comprising a tilting seat mounted on a frame, a carrier hinged to the tilting seat, and a cylinder vertically mounted on the frame with its telescopic end connected to the carrier. The telescopic movement of the cylinder drives the carrier to swing back and forth around the axis of the tilting seat. A supporting device is provided, which has a working surface for supporting the ring-shaped part and can drive the ring-shaped part to rotate circumferentially. A magnetizing device includes a magnetizing seat that can be relatively displaced, a straight magnetic yoke mounted on the magnetizing seat, and a U-shaped magnetic yoke mounted on the magnetizing seat and longitudinally displaced relative to the straight magnetic yoke. The U-shaped magnetic yoke passes through the ring-shaped part to be inspected and connects with the straight magnetic yoke to form a closed-circuit magnetic yoke. A cleaning device is used to clean the ring-shaped part after inspection. A rinsing device is used for a secondary cleaning of the ring-shaped part after inspection. This utility model integrates inspection, cleaning, and protection into a single operation, with a high degree of automation.
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Description

Technical Field

[0001] This utility model belongs to the field of magnetic particle inspection technology, specifically relating to a magnetic particle inspection and cleaning machine for ring-shaped parts. Background Technology

[0002] Magnetic particle testing is a non-destructive testing technique widely used for detecting surface and near-surface defects in metal workpieces.

[0003] For the magnetic particle inspection of various minor defects such as cracks and inclusions caused by grinding and other factors in ring components such as extra-large wind turbine bearings, traditional magnetic particle inspection equipment has the following problems in its use: 1. Insufficient accuracy and comprehensiveness of inspection. Existing fixed magnetic yokes are difficult to adapt to ring components of different specifications, which can easily lead to magnetic field dispersion and difficulty in identifying minute defects; 2. Low efficiency due to disconnect between processes. Inspection, cleaning, and rinsing devices are mostly independent equipment, requiring manual transfer of ring components. This not only increases labor intensity but may also affect the cleaning or protection effect due to secondary positioning deviations. The overall processing cycle is long and cannot meet the needs of mass production. Those skilled in the art urgently need to solve the above technical problems. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, this utility model provides a magnetic particle inspection and cleaning machine for ring-shaped parts, which integrates inspection, cleaning and protection into one operation with a high degree of automation.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A magnetic particle inspection and cleaning machine for ring-shaped parts includes a frame, a tilting mechanism mounted on the frame, and a support device, a magnetizing device, a cleaning device, and a rinsing device mounted on the tilting mechanism.

[0007] in,

[0008] A flipping mechanism includes a flipping seat mounted on the frame, a carrier hinged to the flipping seat, and a cylinder vertically mounted on the frame with its telescopic end connected to the carrier. The telescopic movement of the cylinder drives the carrier to swing back and forth around the axis of the flipping seat.

[0009] The support device has a working surface for supporting the ring-shaped part and can drive the ring-shaped part to rotate circumferentially.

[0010] A magnetization device includes a magnetization base that can be relatively displaced, a straight magnetic yoke mounted on the magnetization base, and a U-shaped magnetic yoke mounted on the magnetization base that can be longitudinally displaced relative to the straight magnetic yoke. The U-shaped magnetic yoke passes through the ring to be tested and is connected to the straight magnetic yoke to form a closed-circuit magnetic yoke.

[0011] A cleaning device used to clean ring-shaped parts after flaw detection;

[0012] A rinsing device is used for secondary cleaning of the annular component after flaw detection.

[0013] In a preferred embodiment of this utility model, the magnetizing device and the cleaning device are respectively located on both sides of the flipping seat, and both are mounted on the carrier;

[0014] The cleaning device and the rinsing device are installed on the same side of the rotating seat and arranged at an angle.

[0015] In a preferred embodiment of the present invention, the supporting device is provided with four sets of supporting frames, which are evenly distributed along the circumference of the carrier. Support seats that can be displaced along their length direction are installed on the supporting frames. Rotating rollers are installed on the support seats. The four rotating rollers form a working surface that supports the annular component and drive the annular component to rotate circumferentially.

[0016] In a preferred embodiment of the present invention, a limiting roller is installed at the end of the rotating roller, and the limiting roller abuts against the outer surface of the annular member.

[0017] In a preferred embodiment of the present invention, the magnetization device further includes a magnetization frame mounted on a carrier, and the magnetization seat is movable along the length direction of the magnetization frame;

[0018] The magnetization device also includes a spraying mechanism, which includes spray pipes installed on the U-shaped magnetic yoke and arranged on the end face of the U-shaped magnetic yoke.

[0019] In a preferred embodiment of the present invention, the cleaning device includes a cleaning frame mounted on a carrier, a cleaning seat that can be displaced along its length direction is mounted on the cleaning frame, and a U-shaped spray washing seat that can be displaced along its longitudinal direction is mounted on the cleaning seat. The spray washing seat passes through a detection ring and is connected to the cleaning seat to form a closed cleaning chamber.

[0020] In a preferred embodiment of this utility model, a straight spray pipe is arranged in the cleaning seat, a U-shaped spray pipe is arranged in the spray seat, and a plurality of spherical nozzles are evenly distributed on the straight spray pipe and the U-shaped spray pipe.

[0021] In a preferred embodiment of the present invention, a machine tool cover that can be relatively displaced is arranged on the frame.

[0022] Beneficial effects:

[0023] This utility model discloses a magnetic particle inspection and cleaning machine for ring-shaped parts. The magnetization device forms a closed-loop magnetic yoke through a U-shaped magnetic yoke and a straight magnetic yoke, ensuring that the ring-shaped part is always in a uniform and concentrated magnetic field during rotation. The magnetic powder gathers clearly at the defect, improving the inspection accuracy. The support device drives the ring-shaped part to rotate circumferentially, and combined with the synchronous spraying of magnetic suspension liquid by the magnetization device, it realizes comprehensive inspection of the ring-shaped part with no dead angles.

[0024] This utility model discloses a magnetic particle inspection and cleaning machine for ring-shaped parts, which integrates cleaning and protection after inspection. The closed cleaning chamber of the cleaning device, together with the adjustable spherical nozzle, forms a high-pressure precision rinsing, and then the water-based rust inhibitor spray of the rinsing device removes magnetic powder and impurities, and forms a protective film on the surface.

[0025] This utility model forms a flaw detection zone and a cleaning zone on both sides of the carrier. The ring-shaped part can be quickly switched between the flaw detection zone and the cleaning zone by the swing of the flipping mechanism. The transfer time from flaw detection to cleaning is shortened, improving the work efficiency. At the same time, it avoids structural interference between flaw detection and cleaning equipment, and the overall structure of the equipment is more compact, saving installation space.

[0026] This utility model integrates flaw detection, cleaning, and protection into a single operation, reducing the transfer time of ring-shaped parts between different processes, improving overall processing efficiency, and achieving a high degree of automation. It can be adapted to flaw detection operations of ring-shaped parts of various specifications, reducing labor intensity, and enabling efficient, stable, and accurate detection of large ring-shaped parts. Attached Figure Description

[0027] Figure 1 A schematic diagram of the structure of a magnetic particle inspection and cleaning machine for ring-shaped parts provided by this utility model;

[0028] Figure 2 A top view of a magnetic particle inspection and cleaning machine for ring-shaped parts provided by this utility model;

[0029] Figure 3 This is a schematic diagram of the installation structure of the flipping mechanism and the supporting device described in this utility model;

[0030] Figure 4 A partial structural schematic diagram of a magnetic particle inspection and cleaning machine for ring-shaped parts provided by this utility model;

[0031] Figure 5 This is a schematic diagram of the installation structure of the flipping mechanism, magnetization device, and support device described in this utility model;

[0032] Figure 6 This is a front view of the magnetization device described in this utility model;

[0033] Figure 7 This is a schematic diagram of the cleaning device described in this utility model;

[0034] Figure 8 This is a schematic diagram of the internal structure of the cleaning device described in this utility model.

[0035] In the diagram: 1 rack;

[0036] 2. Tilting mechanism; 21. Tilting base; 22. Carrier; 23. Cylinder;

[0037] 3 Supporting device, 31 Supporting frame, 32 Supporting seat, 33 Rotating roller, 34 Limiting roller;

[0038] 4 Magnetizing device, 41 Magnetizing base, 42 Linear magnetic yoke, 43 U-shaped magnetic yoke, 44 Magnetizing frame, 45 Spraying mechanism;

[0039] 5. Cleaning device; 51. Cleaning rack; 52. Cleaning seat; 53. Spraying seat;

[0040] 6. Rinsing device;

[0041] 7. Machine tool cover. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0043] like Figure 1-4 As shown, this utility model provides a magnetic particle inspection and cleaning machine for ring-shaped parts, including a frame 1, a flipping mechanism 2 mounted on the frame 1, and a support device 3, a magnetizing device 4, a cleaning device 5 and a rinsing device 6 mounted on the flipping mechanism 2.

[0044] in,

[0045] The flipping mechanism 2 includes a flipping seat 21 mounted on the frame 1, a carrier 22 hinged to the flipping seat 21, and a cylinder 23 vertically mounted on the frame 1 with its telescopic end connected to the carrier 22. The telescopic movement of the cylinder 23 drives the carrier 22 to swing back and forth around the axis of the flipping seat 21, and the carrier 22 can be flipped ±5 degrees.

[0046] The supporting device 3 is provided with a working surface for supporting the ring-shaped part and can drive the ring-shaped part to rotate circumferentially.

[0047] Magnetizing device 4 includes a magnetizing base 41 that can be relatively displaced, a straight magnetic yoke 42 mounted on the magnetizing base 41, and a U-shaped magnetic yoke 43 mounted on the magnetizing base 41 and longitudinally displaced relative to the straight magnetic yoke 42. The U-shaped magnetic yoke 43 passes through the ring to be tested and is connected to the straight magnetic yoke 42 to form a closed-circuit magnetic yoke.

[0048] Cleaning device 5, which is used to clean the annular part after flaw detection;

[0049] Rinsing device 6 is used for secondary cleaning of the annular part after flaw detection.

[0050] The working principle and beneficial effects of the above embodiments are as follows:

[0051] The ring-shaped part to be tested in this utility model is placed on the working surface of the support device 3. The working surface of the support device 3 supports the ring-shaped part and can drive the ring-shaped part to rotate circumferentially.

[0052] The tilting mechanism 2 drives the carrier 22 to swing back and forth around the axis of the rotating seat 21 through the telescopic movement of the cylinder 23, thereby adjusting the tilt angle of the ring part to adapt to the operational requirements of different processes.

[0053] The magnetization device 4 operates by adjusting the position of its magnetization base 41 through relative displacement to adapt to the size of the annular part. The U-shaped magnetic yoke 43 can be longitudinally displaced relative to the straight magnetic yoke 42, and after passing through the annular part to be inspected, it connects with the straight magnetic yoke 42 to form a closed-circuit magnetic yoke. The annular part rotates circumferentially under the drive of the support device 3, so that the entire circumference is in the magnetic field generated by the closed-circuit magnetic yoke. Magnetic powder accumulates at the defect to form a magnetic mark, thus completing the flaw detection. After flaw detection, demagnetization is performed using an automatic attenuation method.

[0054] After the flaw detection is completed, the flipping mechanism adjusts the angle of the carrier to the cleaning position, and the cleaning device 5 performs the first cleaning of the annular part to remove residual magnetic powder and impurities.

[0055] The rinsing device 6 then performs a second cleaning to further remove residual cleaning solution or trace impurities, ensuring the surface of the annular part is clean.

[0056] The supporting device 3 of this utility model drives the ring part to rotate circumferentially. With the concentrated magnetic field generated by the closed-circuit magnetic yoke, it can cover the entire circumferential surface of the ring part, avoiding the omission of defects caused by blind spots in the inspection. The closed-circuit magnetic yoke composed of the straight magnetic yoke 42 and the U-shaped magnetic yoke 43 has a high magnetic field strength and uniform distribution, and a stable magnetization effect, which can more clearly display small defects and improve the flaw detection accuracy.

[0057] The relative displacement of the magnetized base 41 and the longitudinal displacement of the U-shaped magnetic yoke 43 relative to the straight magnetic yoke 42 of this utility model can adapt to the inspection of ring parts with different inner and outer diameters without the need for frequent tooling changes; the angle adjustment of the flipping mechanism 2 can match the operational requirements of different processes such as flaw detection and cleaning.

[0058] This utility model integrates flaw detection and cleaning operations, reduces the transfer time of ring-shaped parts between different processes, improves overall processing efficiency, has a high degree of automation, and reduces the cost of manual intervention.

[0059] In one embodiment,

[0060] The magnetization device 4 and the cleaning device 5 are respectively located on both sides of the flipping base 21 and are both mounted on the carrier 22.

[0061] The cleaning device 5 and the rinsing device 6 are installed on the same side of the flipping seat 21 and are arranged at an angle.

[0062] The carrier 22 of this utility model forms a flaw detection area and a cleaning area on both sides. The ring part can be quickly switched between the "flaw detection area" and the "cleaning area" by the swing of the flipping mechanism 2, which shortens the transfer time from flaw detection to cleaning and improves the work efficiency.

[0063] The magnetization device 4 and the cleaning device 5 are respectively located on both sides of the flipping seat, so that the carrier 22 forms a "left and right partition" layout, avoiding structural interference between the flaw detection and cleaning equipment, making the overall structure of the equipment more compact and saving installation space.

[0064] In one embodiment,

[0065] like Figure 5 As shown, the support device 3 is provided with four sets of support frames 31, which are evenly distributed around the circumference of the carrier 22. Support seats 32 that can be displaced along their length direction are installed on the support frames 31. Rotating rollers 33 are installed on the support seats 32. The four rotating rollers 33 form a working surface that supports the annular component and drive the annular component to rotate circumferentially.

[0066] Four sets of support frames 31 are evenly distributed around the circumference of the carrier 22. The support seats 32 can be displaced along the length direction of the support frames 31. The spacing of the four support seats 32 is adjusted according to the outer diameter of the ring-shaped part to be tested. The aforementioned rotating rollers 33 are connected to a motor that drives them to rotate. The four rotating rollers 33 jointly support the ring-shaped part and use friction to drive the ring-shaped part to rotate circumferentially.

[0067] In one embodiment,

[0068] A limiting roller 34 is installed at the end of the aforementioned rotating roller 33, and the limiting roller 34 abuts against the outer surface of the annular part.

[0069] Four limiting rollers 34 form a circular support working surface that matches the outer circle of the ring part, constraining the ring part radially and preventing it from radially deviating due to centrifugal force, oscillation of the flipping mechanism, and other factors.

[0070] In one embodiment,

[0071] like Figure 5 , 6 As shown, the magnetization device 4 also includes a magnetization frame 44 mounted on the carrier 22. A drive component is mounted on the magnetization frame 44 along its length direction. The magnetization seat 41 is mounted on the drive component. The drive component can drive the magnetization seat 41 to move along the length direction of the magnetization frame 44. The drive component is configured as a screw transmission mechanism.

[0072] The magnetization device 4 also includes a spraying mechanism 45, which includes a spray pipe mounted on a U-shaped magnetic yoke 43 and the spray pipe is arranged on the end face of the U-shaped magnetic yoke 43.

[0073] The spray pipe of the spraying mechanism 45 is installed on the end face of the U-shaped magnetic yoke 43 and passes through the inner hole of the annular part along with the U-shaped magnetic yoke 43. The U-shaped magnetic yoke 43 and the straight magnetic yoke 42 form a closed magnetic yoke to generate a magnetic field. At the same time, the spray pipe sprays magnetic suspension liquid onto the surface of the annular part. The annular part rotates circumferentially under the drive of the support device 3. The magnetic suspension liquid evenly covers its surface. Due to the magnetic field distortion, magnetic powder is adsorbed at the defect to form magnetic traces, realizing the synchronous operation of "magnetization-spraying-defect display" and improving the flaw detection efficiency.

[0074] In one embodiment,

[0075] like Figure 7 As shown, the cleaning device 5 includes a cleaning frame 51 mounted on a carrier 22. A cleaning seat 52 that can be displaced along its length is mounted on the cleaning frame 51. A U-shaped spraying seat 53 that can be displaced along its longitudinal direction is mounted on the cleaning seat 52. The spraying seat 53 passes through the detected annular part and is connected to the cleaning seat 52 to form a closed cleaning chamber. With the rotation of the annular part, 360° cleaning without dead angles can be achieved.

[0076] In one embodiment,

[0077] like Figure 8 As shown, a straight spray pipe is arranged in the cleaning seat 52, and a U-shaped spray pipe is arranged in the spray seat 53. Several spherical nozzles are evenly distributed on the straight spray pipe and the U-shaped spray pipe. The spherical nozzles can be adjusted within a range of 120°. The angle of the nozzles can be adjusted according to the annular parts of different diameters. The material of the spherical nozzles and the spray pipe is SUS304.

[0078] The straight spray pipe in the cleaning seat 52 and the U-shaped spray pipe in the spray seat 53 form a spray system for a closed cleaning chamber.

[0079] In one embodiment,

[0080] The rinsing device 6 and the cleaning device 5 are arranged in the same way. The cleaning device 5 is filled with a cleaning liquid containing a cleaning agent, and the rinsing device 6 is filled with a cleaning agent containing a water-based rust inhibitor. This ensures that the ring part does not develop new rust when it reaches the next process flow, and that there is no new corrosion on the surface of the ring part.

[0081] In one embodiment,

[0082] A machine tool cover 7 that can be relatively displaced is arranged on the frame 1. When loading / unloading, the machine tool cover 7 is displaced to the open state, exposing the carrier 22 and the support device 3, which makes it convenient for operators or automated equipment to pick up and put down the ring-shaped parts. When entering the flaw detection, cleaning or rinsing process, the machine tool cover 7 is displaced to the closed state, forming a closed space and isolating the internal working environment from the external space.

[0083] In summary:

[0084] This utility model discloses a magnetic particle inspection and cleaning machine for ring-shaped parts. The magnetization device forms a closed-loop magnetic yoke through a U-shaped magnetic yoke and a straight magnetic yoke, ensuring that the ring-shaped part is always in a uniform and concentrated magnetic field during rotation. The magnetic powder gathers clearly at the defect, improving the inspection accuracy. The support device drives the ring-shaped part to rotate circumferentially, and combined with the synchronous spraying of magnetic suspension liquid by the magnetization device, it realizes comprehensive inspection of the ring-shaped part with no dead angles.

[0085] This utility model discloses a magnetic particle inspection and cleaning machine for ring-shaped parts, which integrates cleaning and protection after inspection. The closed cleaning chamber of the cleaning device, together with the adjustable spherical nozzle, forms a high-pressure precision rinsing, and then the water-based rust inhibitor spray of the rinsing device removes magnetic powder and impurities, and forms a protective film on the surface.

[0086] This utility model forms a flaw detection zone and a cleaning zone on both sides of the carrier. The ring-shaped part can be quickly switched between the flaw detection zone and the cleaning zone by the swing of the flipping mechanism. The transfer time from flaw detection to cleaning is shortened, improving the work efficiency. At the same time, it avoids structural interference between flaw detection and cleaning equipment, and the overall structure of the equipment is more compact, saving installation space.

[0087] This utility model integrates flaw detection, cleaning, and protection into a single operation, reducing the transfer time of ring-shaped parts between different processes, improving overall processing efficiency, and achieving a high degree of automation. It can be adapted to flaw detection operations of ring-shaped parts of various specifications, reducing labor intensity, and enabling efficient, stable, and accurate detection of large ring-shaped parts.

[0088] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. The terms "front," "back," "left," and "right" used in the text are not specific and are mainly for more intuitive illustration of the technical solution, and do not constitute a limitation. Those skilled in the art should understand that the above embodiments are only for illustrating the technical concept and features of this utility model, and their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the scope of protection of this utility model. All equivalent changes or modifications made according to the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A magnetic particle inspection and cleaning machine for ring-shaped parts, characterized in that: It includes a frame (1), a flipping mechanism (2) mounted on the frame (1), and a support device (3), a magnetizing device (4), a cleaning device (5) and a rinsing device (6) mounted on the flipping mechanism (2); in, The flipping mechanism (2) includes a flipping seat (21) mounted on the frame (1), a carrier (22) hinged to the flipping seat (21), and a cylinder (23) vertically mounted on the frame (1) with its telescopic end connected to the carrier (22). The telescopic movement of the cylinder (23) drives the carrier (22) to swing back and forth around the axis of the flipping seat (21). The supporting device (3) is provided with a working surface for supporting the ring part and can drive the ring part to rotate circumferentially; The magnetization device (4) includes a magnetization seat (41) that can be displaced relative to the magnetization seat (41), a straight magnetic yoke (42) mounted on the magnetization seat (41), and a U-shaped magnetic yoke (43) mounted on the magnetization seat (41) and capable of longitudinal displacement relative to the straight magnetic yoke (42). The U-shaped magnetic yoke (43) passes through the ring to be tested and is connected to the straight magnetic yoke (42) to form a closed-circuit magnetic yoke. Cleaning device (5), which is used to clean the annular part after flaw detection; Rinsing device (6), which is used for secondary cleaning of the annular part after flaw detection.

2. The magnetic particle inspection and cleaning machine for ring-shaped parts according to claim 1, characterized in that: The magnetization device (4) and the cleaning device (5) are respectively located on both sides of the flipping seat (21) and are both installed on the carrier (22); The cleaning device (5) and the rinsing device (6) are installed on the same side of the flipping seat (21) and are arranged at an angle.

3. A magnetic particle inspection and cleaning machine for ring-shaped parts according to claim 1, characterized in that: The supporting device (3) is provided with four sets of supporting frames (31) and is evenly distributed around the circumference of the carrier (22). Support seats (32) that can be displaced along their length are installed on the supporting frames (31). Rotating rollers (33) are installed on the support seats (32). The four rotating rollers (33) form a working surface supporting the annular part and drive the annular part to rotate circumferentially.

4. A magnetic particle inspection and cleaning machine for ring-shaped parts according to claim 3, characterized in that: A limiting roller (34) is installed at the end of the rotating roller (33), and the limiting roller (34) abuts against the outer surface of the annular part.

5. A magnetic particle inspection and cleaning machine for ring-shaped parts according to claim 1, characterized in that: The magnetization device (4) further includes a magnetization frame (44) mounted on a carrier (22), and the magnetization seat (41) is movable along the length of the magnetization frame (44); The magnetization device (4) further includes a spraying mechanism (45), which includes a spray pipe installed on a U-shaped magnetic yoke (43) and the spray pipe is arranged on the end face of the U-shaped magnetic yoke (43).

6. A magnetic particle inspection and cleaning machine for ring-shaped parts according to claim 1, characterized in that: The cleaning device (5) includes a cleaning frame (51) mounted on a carrier (22), a cleaning seat (52) that can be displaced along its length direction is mounted on the cleaning frame (51), and a U-shaped spraying seat (53) that can be displaced along its longitudinal direction is mounted on the cleaning seat (52). The spraying seat (53) passes through the detected annular part and is connected to the cleaning seat (52) to form a closed cleaning chamber.

7. A magnetic particle inspection and cleaning machine for ring-shaped parts according to claim 6, characterized in that: A straight spray pipe is arranged in the cleaning seat (52), and a U-shaped spray pipe is arranged in the spray seat (53). Several spherical nozzles are evenly distributed on the straight spray pipe and the U-shaped spray pipe.

8. A magnetic particle inspection and cleaning machine for ring-shaped parts according to claim 1, characterized in that: A machine tool cover (7) that can be relatively displaced is arranged on the frame (1).