Auxiliary tool for magnetic particle flaw detector and magnetic particle flaw detector

Abstract

The embodiment of the application provides an auxiliary tool of a magnetic particle flaw detector and the magnetic particle flaw detector, and relates to the technical field of nondestructive testing. The auxiliary tool of the magnetic particle flaw detector comprises a connecting sleeve, the connecting sleeve is used for sleeving a rotating shaft of the magnetic particle flaw detector, a first groove and an abutting portion are arranged on the outer peripheral wall of the connecting sleeve; the first groove extends along the circumference of the connecting sleeve, the first groove is used for accommodating a protruding portion of a first workpiece to be tested, so that the protruding portion of the first workpiece to be tested is smoothly connected with the connecting sleeve, so that when the rotating shaft drives the connecting sleeve to rotate, the first workpiece to be tested can rotate with the connecting sleeve, and clamping is avoided; the abutting portion is used for abutting with a second workpiece to be tested, the distance between the second workpiece to be tested and the ground is increased, and the second workpiece to be tested is prevented from being supported. Compared with the prior art, the application can be adapted to various workpieces to be tested with different structures, has high universality, realizes the continuity and stability of the detection process of various workpieces to be tested with different structures, and has high detection efficiency.

Description

Technical Field

[0001] This application relates to the field of nondestructive testing technology, and in particular to an auxiliary tooling for a magnetic particle flaw detector and the magnetic particle flaw detector itself. Background Technology

[0002] Magnetic particle testing is a commonly used non-destructive testing method for detecting defects such as cracks on the surface of parts. The basic principle of magnetic particle testing is to magnetize the surface of the part, distorting the magnetic field at the defect location and creating a leakage magnetic field. Magnetic powder is then sprinkled onto the surface, and the accumulation and distribution of the powder in the leakage magnetic field near the defect allows for the detection of surface or near-surface defects. In parts manufacturing, magnetic particle testing machines are typically used for this purpose.

[0003] In related technologies, magnetic particle testing machines consist of a frame and a rotating shaft. During magnetic particle testing, the workpiece to be tested (gear components, brake discs) is typically placed on the worktable of the frame, and the rotating shaft is tightly pressed against the inner surface of the workpiece. The rotating shaft is then driven to rotate, causing the workpiece to rotate for magnetic particle testing. However, the inner surface of gear components has raised retaining rings with multiple grooves. When the rotating shaft contacts these grooves, the gear component may jam, damaging existing magnetic traces and resulting in low testing reliability. Furthermore, some brake discs are large, and when tightly pressed against the rotating shaft, the bottom of the brake disc may contact the worktable, preventing rotation. Therefore, a single magnetic particle testing machine cannot adapt to various workpieces with different structures, exhibiting poor versatility and low testing efficiency. Utility Model Content

[0004] This application provides auxiliary tooling and a magnetic particle flaw detector to overcome the problems in the prior art where the same magnetic particle flaw detector cannot be adapted to a variety of workpieces with different structures, resulting in poor versatility and low detection efficiency.

[0005] In a first aspect, embodiments of this application provide an auxiliary tooling for a magnetic particle flaw detector, comprising: a connecting sleeve, the connecting sleeve being fitted onto the rotating shaft of the magnetic particle flaw detector and connected to the rotating shaft, wherein a first groove and an abutment portion are provided on the outer peripheral wall of the connecting sleeve.

[0006] The first groove extends circumferentially along the connecting sleeve and is used to accommodate the protrusion of the first workpiece to be tested.

[0007] The abutting portion extends circumferentially along the connecting sleeve and is used to abut against the second workpiece to be tested.

[0008] In one possible implementation, the width of the first groove is greater than or equal to 15 mm and less than or equal to 25 mm, and the depth of the first groove is greater than or equal to 15 mm and less than or equal to 25 mm.

[0009] In one possible implementation, the connecting sleeve has a first end and a second end disposed opposite to each other, the first groove being located between the first end and the abutting portion, and the distance between the first groove and the first end being greater than or equal to 35 mm and less than or equal to 45 mm.

[0010] In one possible implementation, the abutment portion is a second groove, which is spaced apart from the first groove along the axial direction of the connecting sleeve, and the second groove is used to accommodate the second workpiece to be tested.

[0011] In one possible implementation, the width of the second groove is greater than or equal to 20 mm and less than or equal to 30 mm, and the depth of the second groove is greater than or equal to 15 mm and less than or equal to 25 mm.

[0012] In one possible implementation, the second groove is located between the first groove and the second end, and the distance between the second groove and the second end is greater than or equal to 35 mm and less than or equal to 45 mm.

[0013] In one possible implementation, the thickness of the connecting sleeve is greater than or equal to 50 mm.

[0014] The length of the connecting sleeve is greater than or equal to 245 mm and less than or equal to 255 mm.

[0015] In one possible implementation, an elastic pad is further included, wherein the elastic pad is disposed on the inner wall of the first groove, and the elastic pad is used to contact the first workpiece to be tested.

[0016] In one possible implementation, the surface of the connecting sleeve has anti-slip textures, which are used to increase the friction between the first workpiece to be tested and the rotating shaft and the connecting sleeve, respectively.

[0017] Secondly, embodiments of this application provide a magnetic particle flaw detector, including a frame, a rotating shaft, and auxiliary tooling for the magnetic particle flaw detector provided in the first aspect. The rotating shaft is mounted on the frame, and the connecting sleeve of the auxiliary tooling for the magnetic particle flaw detector is connected to the rotating shaft.

[0018] The auxiliary tooling and magnetic particle flaw detector provided in this application embodiment include an auxiliary tooling and a magnetic particle flaw detector. The auxiliary tooling features a first groove and an abutment portion on its connecting sleeve. The first groove accommodates the protrusion of a first workpiece to be tested, allowing a smooth transition between the protrusion and the connecting sleeve. This ensures that the first workpiece rotates with the connecting sleeve when the shaft rotates, preventing jamming. Furthermore, the abutment portion abuts against a second workpiece to be tested. The abutment portion has thickness, increasing the distance between the second workpiece and the ground, preventing the second workpiece from bottoming out. Compared to existing technologies, the auxiliary tooling of this application can adapt to various workpieces with different structures, offering strong versatility. It enables continuous and stable testing of various workpieces with different structures using the same magnetic particle flaw detector, resulting in high testing efficiency. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0020] Figure 1 A schematic diagram of the auxiliary tooling for the magnetic particle flaw detector provided in this application;

[0021] Figure 2 A schematic diagram showing the connection between the auxiliary tooling of the magnetic particle flaw detector provided in this application and the first workpiece to be tested;

[0022] Figure 3 This is a schematic diagram of the magnetic particle flaw detector provided in this application.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100 - Connecting sleeve; 110 - First groove; 120 - Abutting part; 130 - First end; 140 - Second end; 150 - Receiving cavity;

[0025] 200 - Elastic padding layer;

[0026] 300 - First workpiece to be tested; 310 - Protrusion; 320 - Bearing surface;

[0027] 400-spindle;

[0028] 500 - Rack; 510 - Support base;

[0029] 600-Magnetization device;

[0030] 700-guide rail;

[0031] 800-Controller.

[0032] To facilitate understanding of the embodiments of this application, the spline curves and arrows used in the reference numerals in the accompanying drawings are explained below: the components indicated by spline curves without arrows can be solid components, that is, components with solid structures; the components indicated by spline curves with arrows can be virtual components, that is, components without solid structures; in some cases, the components indicated by spline curves with arrows can also be assemblies with solid structures or virtual structures.

[0033] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0034] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0035] The terms "first," "second," "third," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein.

[0036] Secondly, it should be noted that in the description of this application, the terms "inner", "outer", "first direction", "second direction", etc., indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0037] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] As described in the background section, a magnetic particle inspection machine consists of a frame and a rotating shaft. During magnetic particle inspection, the workpiece to be tested (gear, brake disc, etc.) is typically placed on the worktable of the frame, and the rotating shaft is tightly pressed against the inner surface of the workpiece. The rotating shaft is then driven to rotate, causing the workpiece to rotate for magnetic particle inspection. However, the inner surface of the gear has raised retaining rings with multiple grooves. When the rotating shaft contacts these grooves, the gear may jam, damaging existing magnetic traces and resulting in low inspection reliability. Furthermore, some brake discs are quite large; when tightly pressed against the rotating shaft, the bottom of the brake disc may contact the worktable, preventing rotation.

[0039] It is evident that the same magnetic particle flaw detector cannot be adapted to various workpieces with different structures, resulting in poor versatility and low detection efficiency.

[0040] To address the aforementioned technical problems, this application provides an auxiliary tooling for a magnetic particle flaw detector, comprising: a connecting sleeve, which is used to be fitted onto the rotating shaft of the magnetic particle flaw detector and is connected to the rotating shaft; a first groove and an abutment portion are provided on the outer peripheral wall of the connecting sleeve.

[0041] The first groove extends circumferentially along the connecting sleeve. The first groove is used to accommodate the protrusion of the first workpiece to be tested, so that the protrusion of the first workpiece to be tested smoothly transitions with the connecting sleeve, so that when the rotating shaft drives the connecting sleeve to rotate, the first workpiece to be tested can rotate with the connecting sleeve, avoiding jamming.

[0042] The abutting part extends circumferentially along the connecting sleeve. The abutting part is used to abut against the second workpiece to be tested. The abutting part has a thickness, thereby increasing the distance between the second workpiece to be tested and the ground, and preventing the second workpiece to be tested from bottoming out.

[0043] Compared with existing technologies, the auxiliary tooling of this application can be adapted to a variety of workpieces with different structures, has strong versatility, and can achieve continuity and stability in the detection process of various workpieces with different structures using the same magnetic particle flaw detector, resulting in high detection efficiency.

[0044] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0045] This application provides an auxiliary tooling for a magnetic particle flaw detector, combined with... Figures 1 to 3 As shown, it includes: a connecting sleeve 100, which is used to be sleeved on the rotating shaft 400 of the magnetic particle flaw detector, and the connecting sleeve 100 is connected to the rotating shaft 400. The outer peripheral wall of the connecting sleeve 100 is provided with a first groove 110 and an abutment portion 120.

[0046] The first groove 110 extends circumferentially along the connecting sleeve 100 and is used to accommodate the protrusion 310 of the first workpiece to be tested 300.

[0047] The abutment portion 120 extends circumferentially along the connecting sleeve 100 and is used to abut against the second workpiece to be tested.

[0048] It is understandable that, such as Figure 3 As shown, the magnetic particle flaw detector includes a rotating shaft 400, a frame 500, a magnetizing device 600, a guide rail 700, and a controller 800. A support base 510 is provided on the frame 500, the rotating shaft 400 is mounted on the support base 510, and a connecting sleeve 100 is used to fit on the rotating shaft 400.

[0049] Among them, such as Figure 2 As shown, the first workpiece to be tested 300 can be a gear, and the gear has a protrusion 310, which can be a retaining ring. The protrusion 310 has multiple spaced grooves along its circumference. When the rotating shaft 400 of the magnetic particle flaw detector comes into contact with the grooves of the protrusion 310, it will cause the gear to jam, resulting in damage to the formed magnetic traces and low detection reliability.

[0050] Furthermore, the second workpiece to be tested can be a brake disc. Some brake discs are quite large. When the brake disc is fitted onto the rotating shaft 400, the bottom of the brake disc will contact the table surface of the frame 500, causing the brake disc to be unable to rotate with the rotating shaft 400.

[0051] Therefore, an auxiliary tooling for a magnetic particle flaw detector can be set up that can adapt to a variety of workpieces with different structures, has strong versatility, and realizes the continuity and stability of the detection process for various workpieces with different structures.

[0052] Combination Figures 1 to 3 As shown, when performing magnetic particle testing, the connecting sleeve 100 can be fitted onto the rotating shaft 400, and the first workpiece to be tested 300 can be fitted onto the connecting sleeve 100. The protrusion 310 on the first workpiece to be tested 300 is located in the first groove 110 of the connecting sleeve 100. The controller 800 drives the rotating shaft 400 to rotate, thereby moving the first workpiece to be tested 300 and driving the magnetizing device 600 to move along the guide rail 700 to perform magnetic particle testing on the first workpiece to be tested 300.

[0053] Of course, it should be noted that when performing magnetic particle testing, the second workpiece to be tested can also be brought into contact with the abutting part 120 of the connecting sleeve 100, and the above operations can be performed simultaneously to perform magnetic particle testing on the second workpiece to be tested.

[0054] Specifically, by providing a first groove 110 and an abutment portion 120 on the connecting sleeve 100 of the auxiliary tooling, the first groove 110 can accommodate the protrusion 310 of the first workpiece to be tested 300, so that the protrusion 310 of the first workpiece to be tested 300 smoothly transitions with the connecting sleeve 100, so that when the rotating shaft 400 drives the connecting sleeve 100 to rotate, the first workpiece to be tested 300 can rotate with the connecting sleeve 100, avoiding jamming.

[0055] Furthermore, the abutting part 120 can abut against the second workpiece to be tested. The abutting part 120 has a thickness, thereby increasing the distance between the second workpiece to be tested and the ground, and preventing the second workpiece to be tested from bottoming out.

[0056] Compared with existing technologies, the auxiliary tooling of this application can be adapted to a variety of workpieces with different structures, has strong versatility, and can achieve continuity and stability in the detection process of various workpieces with different structures using the same magnetic particle flaw detector, resulting in high detection efficiency.

[0057] In one possible implementation, combining Figure 1 As shown, the width of the first groove 110 is greater than or equal to 15 mm and less than or equal to 25 mm, and the depth of the first groove 110 is greater than or equal to 15 mm and less than or equal to 25 mm.

[0058] With this configuration, the size of the first groove 110 matches that of the protrusion 310 of the first workpiece to be tested 300. The first groove 110 can accommodate the protrusion 310 of the first workpiece to be tested 300, isolating the rotating shaft 400 from contact with the groove or unevenness on the protrusion 310, avoiding rotation jamming, and realizing continuous rotation detection.

[0059] Among them, combined Figure 2 As shown, the first workpiece to be tested 300 has a bearing surface 320, and a protrusion 310 is connected to the bearing surface 320. In specific implementation, the protrusion 310 is installed in the first groove 110, and the bearing surface 320 of the first workpiece to be tested 300 is tightly fitted with the connecting sleeve 100 to prevent the first workpiece to be tested 300 from tilting.

[0060] Furthermore, the connecting sleeve 100 has a first end 130 and a second end 140 disposed opposite to each other, a first groove 110 is located between the first end 130 and the abutment portion 120, and the distance between the first groove 110 and the first end 130 is greater than or equal to 35 mm and less than or equal to 45 mm.

[0061] Combination Figure 1 and Figure 2As shown, the first groove 110 is disposed between the first end 130 and the abutment portion 120, and is close to the first end 130. This arrangement restricts the position of the first groove 110, which helps to tightly fit the protrusion 310 of the first workpiece to be tested 300 with the first groove 110, and prevents the protrusion 310 of the first workpiece to be tested 300 from disengaging from the first groove 110 during rotation.

[0062] Furthermore, the first groove 110 is positioned at a distance of 35 mm or more and 45 mm or less from one end of the connecting sleeve 100. When the protrusion 310 of the first workpiece to be tested 300 is installed in the first groove 110, the connecting sleeve 100 can maintain balance and prevent the second end 140 of the connecting sleeve 100 from tilting up, so that the first workpiece to be tested 300 can rotate smoothly with the rotating shaft 400 to achieve magnetic particle flaw detection.

[0063] In one possible implementation, such as Figure 1 As shown, the abutment portion 120 is a second groove, which is spaced apart from the first groove 110 along the axial direction of the connecting sleeve 100. The second groove is used to accommodate the second workpiece to be tested.

[0064] like Figure 1 As shown, the abutment portion 120 can be a second groove, which is an annular groove, and is spaced apart from the first groove 110 along the axial direction of the connecting sleeve 100.

[0065] The second groove can accommodate the second workpiece to be tested. The second workpiece to be tested can be a brake disc. In specific implementation, the second workpiece to be tested can be installed in the second groove so that the second workpiece to be tested can rotate along the second groove, avoiding deviation or shaking of the second workpiece to be tested during the rotation of the rotating shaft 400, and ensuring that the magnetizing device 600 magnetizes the second workpiece to be tested uniformly.

[0066] In addition, the bottom of the second groove has a thickness to raise the second workpiece to be tested, increase the distance between the second workpiece to be tested and the worktable surface of the frame 500, and prevent the second workpiece to be tested from being stuck to the bottom.

[0067] Furthermore, the width of the second groove is greater than or equal to 20 mm and less than or equal to 30 mm, and the depth of the second groove is greater than or equal to 15 mm and less than or equal to 25 mm.

[0068] Understandably, with this configuration, the second groove matches the size of the second workpiece to be tested, and the second groove can accommodate the second workpiece to be tested so that the second workpiece to be tested can rotate along the second groove, avoiding rotational tilt and realizing continuous rotation detection.

[0069] Furthermore, combined Figure 1As shown, the second groove is located between the first groove 110 and the second end 140, and the distance between the second groove and the second end 140 is greater than or equal to 35 mm and less than or equal to 45 mm.

[0070] Understandably, this setting, which restricts the position of the second groove, helps to ensure a tight fit between the second workpiece to be tested and the second groove, preventing the second workpiece to be tested from detaching from the second groove during rotation.

[0071] Furthermore, the second groove is set at a position greater than or equal to 35 mm and less than or equal to 45 mm from the second end 140. When the second workpiece to be tested is installed in the second groove, the connecting sleeve 100 can maintain balance and prevent the first end 130 of the connecting sleeve 100 from tilting up, so that the second workpiece to be tested can rotate smoothly with the rotating shaft 400 to realize magnetic particle flaw detection.

[0072] In one possible implementation, the thickness of the connecting sleeve 100 is greater than or equal to 50 mm.

[0073] It is understandable that the second workpiece to be tested can be a brake disc. Some brake discs are quite large. When the brake disc is fitted onto the rotating shaft 400, the bottom of the brake disc contacts the worktable surface of the frame 500, which may cause the rotating shaft 400 to be unable to drive the brake disc to rotate, making it impossible to perform magnetic particle inspection.

[0074] Combination Figure 2 and Figure 3 As shown, the thickness of the connecting sleeve 100 can increase the distance between the second workpiece to be tested and the worktable of the frame 500, so that after the second workpiece to be tested is fitted onto the connecting sleeve 100, the second workpiece to be tested is in a suspended state, so that the rotating shaft 400 can drive the second workpiece to be tested to rotate and perform magnetic particle inspection.

[0075] The length of the connecting sleeve 100 is greater than or equal to 245 mm and less than or equal to 255 mm.

[0076] Understandably, within this range, the connecting sleeve 100 can be fully fitted onto the rotating shaft 400 of the magnetic particle flaw detector so that the rotating shaft 400 can support the first groove 110 or the abutment part 120, avoiding any suspended part between the connecting sleeve 100 and the rotating shaft 400 during the rotation of the rotating shaft 400, thereby ensuring that the first workpiece to be tested or the second workpiece to be tested can rotate with the rotating shaft 400 to achieve magnetic particle flaw detection.

[0077] In one possible implementation, an elastic pad 200 is also included. The elastic pad 200 is provided on the inner wall of the first groove 110 and is used to contact the first workpiece 300 to be tested.

[0078] Combination Figure 1As shown, elastic pads 200 can be provided in both the first groove 110 and the second groove. In practice, both the first workpiece to be tested 300 and the second workpiece to be tested can contact the elastic pads 200. The elastic pads 200 can absorb the impact force generated when the first workpiece to be tested 300 and the second workpiece to be tested rotate, thereby extending the life of the connecting sleeve 100 and the rotating shaft 400 and reducing maintenance costs.

[0079] Among them, the elastic pad 200 can be a rubber pad.

[0080] Furthermore, it should be noted that the connecting sleeve 100 can be a flexible sleeve, specifically a nylon sleeve. When the protrusion 310 of the first workpiece to be tested 300 is installed in the first groove 110, and when the second workpiece to be tested is installed in the second groove, the connecting sleeve 100 is in flexible contact with both the first and second workpieces to be tested, reducing rigid interference between the first and second workpieces to be tested and the connecting sleeve 100, lowering the frequency of jamming, reducing the need for manual intervention, and improving testing efficiency.

[0081] In one possible implementation, the surface of the connecting sleeve 100 has anti-slip textures, which are used to increase the friction between the first workpiece to be tested 300 and the rotating shaft 400 and the connecting sleeve 100, respectively.

[0082] like Figure 1 As shown, the connecting sleeve 100 has a receiving cavity 150, and the rotating shaft 400 abuts against the inner circumferential surface of the receiving cavity 150. The inner circumferential surface of the receiving cavity 150 may be provided with anti-slip texture to increase the friction between the rotating shaft 400 and the connecting sleeve 100 so that the rotating shaft 400 can rotate and drive the connecting sleeve 100 to rotate.

[0083] Similarly, the outer peripheral surface of the connecting sleeve 100 is also provided with anti-slip texture to increase the friction between the first workpiece 300 and the second workpiece and the connecting sleeve 100, so as to drive the first workpiece 300 and the second workpiece to rotate for magnetic particle testing.

[0084] It should be noted that the surface of the connecting sleeve 100 can also be frosted, as long as it can increase friction.

[0085] Finally, it should be noted that other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and alterations may be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An auxiliary tooling for a magnetic particle flaw detector, characterized in that, include: A connecting sleeve (100) is used to be fitted onto the rotating shaft (400) of the magnetic particle flaw detector, and the connecting sleeve (100) is connected to the rotating shaft (400). A first groove (110) and an abutment part (120) are provided on the outer peripheral wall of the connecting sleeve (100). The first groove (110) extends circumferentially along the connecting sleeve (100) and is used to accommodate the protrusion (310) of the first workpiece to be tested (300). The abutting portion (120) extends circumferentially along the connecting sleeve (100) and is used to abut against the second workpiece to be tested.

2. The auxiliary tooling for the magnetic particle flaw detector according to claim 1, characterized in that, The width of the first groove (110) is greater than or equal to 15 mm and less than or equal to 25 mm, and the depth of the first groove (110) is greater than or equal to 15 mm and less than or equal to 25 mm.

3. The auxiliary tooling for the magnetic particle flaw detector according to claim 2, characterized in that, The connecting sleeve (100) has a first end (130) and a second end (140) disposed opposite to each other. The first groove (110) is located between the first end (130) and the abutment portion (120). The distance between the first groove (110) and the first end (130) is greater than or equal to 35 mm and less than or equal to 45 mm.

4. The auxiliary tooling for the magnetic particle flaw detector according to claim 3, characterized in that, The abutment portion (120) is a second groove, which is spaced apart from the first groove (110) along the axial direction of the connecting sleeve (100). The second groove is used to accommodate the second workpiece to be tested.

5. The auxiliary tooling for the magnetic particle flaw detector according to claim 4, characterized in that, The width of the second groove is greater than or equal to 20 mm and less than or equal to 30 mm, and the depth of the second groove is greater than or equal to 15 mm and less than or equal to 25 mm.

6. The auxiliary tooling for the magnetic particle flaw detector according to claim 5, characterized in that, The second groove is located between the first groove (110) and the second end (140), and the distance between the second groove and the second end (140) is greater than or equal to 35 mm and less than or equal to 45 mm.

7. The auxiliary tooling for the magnetic particle flaw detector according to any one of claims 1-6, characterized in that, The thickness of the connecting sleeve (100) is greater than or equal to 50 mm; The length of the connecting sleeve (100) is greater than or equal to 245 mm and less than or equal to 255 mm.

8. The auxiliary tooling for the magnetic particle flaw detector according to any one of claims 1-6, characterized in that, It also includes an elastic pad (200), which is provided on the inner wall of the first groove (110) and is used to contact the first workpiece to be tested (300).

9. The auxiliary tooling for the magnetic particle flaw detector according to any one of claims 1-6, characterized in that, The surface of the connecting sleeve (100) has anti-slip texture, which is used to increase the friction between the first workpiece to be tested (300) and the rotating shaft (400) and the connecting sleeve (100).

10. A magnetic particle flaw detector, characterized in that, The device includes a frame (500), a rotating shaft (400), and an auxiliary tooling for the magnetic particle flaw detector according to any one of claims 1-9. The rotating shaft (400) is mounted on the frame (500), and the connecting sleeve (100) of the auxiliary tooling for the magnetic particle flaw detector is connected to the rotating shaft (400).

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