Ultrasonic flaw detection comparison sample shaft for hollow axle of rail transit vehicle

Abstract

The utility model discloses an ultrasonic flaw detection comparison sample shaft for a hollow axle of a rail transit vehicle, which comprises a shaft body which is sequentially provided with a shaft neck, an unloading groove, a wheel seat, a gear box seat and a shaft body; an inner hole is formed in the axis position of the shaft body in a penetrating mode. The transverse defect, the longitudinal defect and the inner hole circular ring defect on the axle body are not only used for verifying the ultrasonic flaw detection program of the hollow axle, but also can quickly and accurately calibrate the flaw detection sensitivity. Wherein the inner hole circular ring defect can effectively calibrate and compare the inner hole surface defect, and the transverse defect and the longitudinal defect can effectively calibrate and compare the axle surface defect, especially the calibration and comparison of the defect of the arc transition part of the axle. The contrast sample shaft can be suitable for ultrasonic flaw detection of hollow axles of different vehicle types such as standard motor train units and inter-city motor train units, and the flaw detection efficiency and the product quality are improved.

Description

Technical Field

[0001] This utility model relates to the field of rail transit vehicle inspection, and more particularly to a comparative sample axle for ultrasonic flaw detection of hollow axles of rail transit vehicles. Background Technology

[0002] Hollow axles are a critical component of the running gear of rail transit vehicles, and their quality directly determines the vehicle's ride comfort, operational stability, and safety. As rail transit vehicles operate at increasingly higher speeds, the demands on axle quality are becoming increasingly stringent. Ultrasonic testing is a crucial technology for detecting internal and surface defects in hollow axles. While ultrasonic testing of hollow axles has become automated, existing methods for calibrating ultrasonic testing sensitivity cannot effectively calibrate and define the arc transition positions and inner hole surface positions of hollow axles due to the complex axle structure. Furthermore, existing test sample blocks lack artificial defects such as inner hole annular defects and arc transition defects, making it difficult to calibrate and quantitatively compare inner hole surface defects. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a comparative sample shaft for ultrasonic flaw detection of hollow axles in rail transit vehicles, used for verifying ultrasonic flaw detection procedures and for the calibration and quantitative comparison of defects.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is:

[0005] A comparative sample axle for ultrasonic flaw detection of hollow axles in rail transit vehicles, comprising:

[0006] The shaft body is provided with a journal, a load-bearing groove, a wheel seat, a gearbox seat, and a shaft body in sequence; an inner hole is provided through the shaft center of the shaft body;

[0007] A transverse defect is provided on the outer surface of the shaft body. There are four transverse defects: the first transverse defect is located on the outer surface of the journal, the second transverse defect is located on the outer surface of the wheel seat, the third transverse defect is located on the outer surface of the gearbox seat, and the fourth transverse defect is located on the outer surface of the shaft body at the arc position.

[0008] Longitudinal defects are provided on the outer surface of the shaft body. There are four longitudinal defects: the first longitudinal defect is located on the outer surface of the journal, the second longitudinal defect is located on the outer surface of the wheel seat, the third longitudinal defect is located on the outer surface of the gearbox seat, and the fourth longitudinal defect is located on the outer surface of the shaft body.

[0009] An inner annular defect is present on the inner surface of the shaft body.

[0010] According to some embodiments of the present invention, the first transverse defect, the second transverse defect, the third transverse defect, and the fourth transverse defect all have a depth of 1 mm, a length of 15 mm, and a width of 0.25 mm.

[0011] According to some embodiments of the present invention, the first lateral defect is 218 mm away from the second lateral defect, the second lateral defect is 330 mm away from the third lateral defect, and the third lateral defect is 250 mm away from the fourth lateral defect.

[0012] According to some embodiments of the present invention, the first longitudinal defect, the second longitudinal defect, the third longitudinal defect, and the fourth longitudinal defect all have a depth of 1 mm, a length of 15 mm, and a width of 0.25 mm.

[0013] According to some embodiments of the present invention, the first longitudinal defect is 300 mm away from the second longitudinal defect, the second longitudinal defect is 310 mm away from the third longitudinal defect, and the third longitudinal defect is 340 mm away from the fourth longitudinal defect.

[0014] According to some embodiments of this utility model, the inner hole annular defect has a depth of 0.5 mm and a width of 1 mm.

[0015] According to some embodiments of the present invention, the length of the shaft body is 1218 mm.

[0016] According to some embodiments of this utility model, the inner hole diameter is 60 mm.

[0017] According to some embodiments of this utility model, the outer diameter of the journal is 130 mm, the outer diameter of the wheel seat is 212 mm, the outer diameter of the gearbox seat is 216 mm, and the outer diameter of the shaft body is 180 mm.

[0018] According to some embodiments of this utility model, the outer diameter of the unloading groove is 160 mm.

[0019] This invention offers at least the following advantages: Transverse defects, longitudinal defects, and inner hole annular defects on the axle body are not only used for verifying the ultrasonic flaw detection procedure for hollow axles, but also for quickly and accurately calibrating the flaw detection sensitivity. Specifically, the inner hole annular defect effectively calibrates and compares inner hole surface defects, while the transverse and longitudinal defects effectively calibrate and compare axle surface defects, especially defects at the axle's arc transition section. This comparison sample axle is applicable to ultrasonic flaw detection of hollow axles for different models, including standard EMUs and intercity EMUs, improving flaw detection efficiency and product quality. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 for Figure 1 A cross-sectional view of the transverse defect AA;

[0023] Figure 3 for Figure 1 Longitudinal defect BB cross-section diagram;

[0024] Figure 4 for Figure 1 CC cross-sectional view of the inner hole annular defect. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0028] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0029] Reference Figure 1 , one A comparative sample axle for ultrasonic flaw detection of hollow axles of rail transit vehicles, including:

[0030] The shaft body 100 is provided with a journal 120, a load-bearing groove 160, a wheel seat 130, a gearbox seat 140 and a shaft body 150 in sequence; an inner hole 110 is provided through the shaft center of the shaft body 100.

[0031] Reference Figure 2 A transverse defect 200 is provided on the outer surface of the shaft body 100. The transverse defect 200 has four lines: the first transverse defect 210 is located on the outer surface of the journal 120, the second transverse defect 220 is located on the outer surface of the wheel seat 130, the third transverse defect 230 is located on the outer surface of the gearbox seat 140, and the fourth transverse defect 240 is located on the outer surface of the arc position of the shaft body 150.

[0032] Reference Figure 3 Longitudinal defects 300 are provided on the outer surface of the shaft body 100. There are four longitudinal defects 300: the first longitudinal defect 310 is located on the outer surface of the journal 120, the second longitudinal defect 320 is located on the outer surface of the wheel seat 130, the third longitudinal defect 330 is located on the outer surface of the gearbox seat 140, and the fourth longitudinal defect 340 is located on the outer surface of the shaft body 150.

[0033] Reference Figure 4 An inner annular defect 400 is provided on the surface of the inner hole 110 of the shaft body 100.

[0034] The shaft body 100 is made of EA4T alloy steel. The transverse defect 200, longitudinal defect 300, and inner hole annular defect 400 are manufactured by wire cutting.

[0035] The first transverse defect 210, the second transverse defect 220, the third transverse defect 230, and the fourth transverse defect 240 all have a depth of 1 mm, a length of 15 mm, and a width of 0.25 mm.

[0036] The first transverse defect 210 is 218 mm away from the second transverse defect 220, the second transverse defect 220 is 330 mm away from the third transverse defect 230, and the third transverse defect 230 is 250 mm away from the fourth transverse defect 240.

[0037] The first longitudinal defect 310, the second longitudinal defect 320, the third longitudinal defect 330, and the fourth longitudinal defect 340 all have a depth of 1 mm, a length of 15 mm, and a width of 0.25 mm.

[0038] The first longitudinal defect 310 is 300 mm away from the second longitudinal defect 320, the second longitudinal defect 320 is 310 mm away from the third longitudinal defect 330, and the third longitudinal defect 330 is 340 mm away from the fourth longitudinal defect 340.

[0039] The inner annular defect 400 has a depth of 0.5 mm and a width of 1 mm.

[0040] The length of the shaft body 100 is 1218 mm. The diameter of the inner hole 110 is 60 mm. The outer diameter of the journal 120 is 130 mm, the outer diameter of the wheel seat 130 is 212 mm, the outer diameter of the gearbox seat 140 is 216 mm, and the outer diameter of the shaft body 150 is 180 mm. The outer diameter of the unloading groove 160 is 160 mm.

[0041] The specific process for ultrasonic flaw detection of the sample shaft is as follows: Install an adapter on the end of the sample shaft, connecting it to the adapter via the threaded connection within the inner hole of the sample shaft end. The adapter and the inner hole of the sample shaft should fit tightly. After installing the adapter, clean the inner hole of the sample shaft. Adjust the probe arm of the flaw detector to a suitable height, ensuring that the probe arm and the sample shaft are at the same horizontal level and on a straight line, guaranteeing that the end face of the probe arm fits tightly against the end face of the axle. Place the probe arm in the inner hole of the sample shaft and tighten it. Select the appropriate flaw detection program and sensitivity program on the flaw detector to begin flaw detection of the sample shaft. After flaw detection is completed, confirm the defect detection results of the sample shaft. It should accurately detect the transverse defect 200, longitudinal defect 300, and inner hole annular defect 400 on the surface of the shaft body 100.

[0042] The transverse defects 200, longitudinal defects 300, and inner hole annular defects 400 on the surface of the axle body 100 are not only used for verification of the ultrasonic flaw detection program for hollow axles, but also for rapid and accurate calibration of flaw detection sensitivity. Among them, the inner hole annular defect 400 can effectively calibrate and compare inner hole surface defects, while the transverse defects 200 and longitudinal defects 300 can effectively calibrate and compare axle surface defects, especially defects at the axle's arc transition area. This comparison sample axle is applicable to ultrasonic flaw detection of hollow axles of different models, such as standard EMUs and intercity EMUs, improving flaw detection efficiency and product quality.

[0043] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A comparative sample axle for ultrasonic flaw detection of hollow axles in rail transit vehicles, characterized in that, include: The shaft body (100) is provided with a journal (120), a load-bearing groove (160), a wheel seat (130), a gearbox seat (140), and a shaft body (150) in sequence; an inner hole (110) is provided through the shaft center of the shaft body (100); A transverse defect (200) is provided on the outer surface of the shaft body (100). The transverse defect (200) has four lines: the first transverse defect (210) is located on the outer surface of the journal (120), the second transverse defect (220) is located on the outer surface of the wheel seat (130), the third transverse defect (230) is located on the outer surface of the gearbox seat (140), and the fourth transverse defect (240) is located on the outer surface of the arc position of the shaft body (150). Longitudinal defects (300) are provided on the outer surface of the shaft body (100). There are four longitudinal defects (300): the first longitudinal defect (310) is located on the outer surface of the journal (120), the second longitudinal defect (320) is located on the outer surface of the wheel seat (130), the third longitudinal defect (330) is located on the outer surface of the gearbox seat (140), and the fourth longitudinal defect (340) is located on the outer surface of the shaft body (150). An inner hole annular defect (400) is provided on the surface of the inner hole (110) of the shaft body (100).

2. The ultrasonic flaw detection comparison sample axle for hollow axles of rail transit vehicles according to claim 1, characterized in that: The first transverse defect (210), the second transverse defect (220), the third transverse defect (230), and the fourth transverse defect (240) all have a depth of 1 mm, a length of 15 mm, and a width of 0.25 mm.

3. The ultrasonic flaw detection comparison sample axle for hollow axles of rail transit vehicles according to claim 1, characterized in that: The first transverse defect (210) is 218 mm away from the second transverse defect (220), the second transverse defect (220) is 330 mm away from the third transverse defect (230), and the third transverse defect (230) is 250 mm away from the fourth transverse defect (240).

4. The ultrasonic flaw detection comparison sample axle for hollow axles of rail transit vehicles according to claim 1, characterized in that: The first longitudinal defect (310), the second longitudinal defect (320), the third longitudinal defect (330), and the fourth longitudinal defect (340) all have a depth of 1 mm, a length of 15 mm, and a width of 0.25 mm.

5. The ultrasonic flaw detection comparison sample axle for hollow axles of rail transit vehicles according to claim 1, characterized in that: The first longitudinal defect (310) is 300 mm away from the second longitudinal defect (320), the second longitudinal defect (320) is 310 mm away from the third longitudinal defect (330), and the third longitudinal defect (330) is 340 mm away from the fourth longitudinal defect (340).

6. The ultrasonic flaw detection comparison sample axle for hollow axles of rail transit vehicles according to claim 1, characterized in that: The inner annular defect (400) has a depth of 0.5 mm and a width of 1 mm.

7. The ultrasonic flaw detection comparison sample axle for hollow axles of rail transit vehicles according to claim 1, characterized in that: The length of the shaft body (100) is 1218 mm.

8. The ultrasonic flaw detection comparison sample axle for hollow axles of rail transit vehicles according to claim 1, characterized in that: The inner hole (110) has a diameter of 60 mm.

9. The ultrasonic flaw detection comparison sample axle for hollow axles of rail transit vehicles according to claim 1, characterized in that: The outer diameter of the journal (120) is 130 mm, the outer diameter of the wheel seat (130) is 212 mm, the outer diameter of the gearbox seat (140) is 216 mm, and the outer diameter of the shaft body (150) is 180 mm.

10. A comparative sample axle for ultrasonic flaw detection of hollow axles of rail transit vehicles according to claim 1, characterized in that: The outer diameter of the unloading groove (160) is 160 mm.

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