JP4409465B2 - Magnetic particle inspection equipment for railway wheel treads - Google Patents

Description

The present invention relates to magnetic particle inspection 査装 location for checking the wheel tread scratch railcar.

The damage and flatness that are scratches on the wheels of railroad vehicles not only lead to increased noise during vehicle travel, but are also struck against the rails during travel, giving the rails a shocking force. It also becomes. In addition, cracks may occur from the tread scratch itself, which may develop and lead to large peeling, and neglecting management can lead to wheel failure. However, since the wheel tread has adhesion of rust or the like, it is difficult to visually confirm the crack growth region. Therefore, a part of the wheel tread is magnetized by using a simple device such as a portable magnetic particle inspection device (bipolar type) at the site to check for cracks.
Non-destructive inspection manual [new edition], edited by Japan Non-Destructive Inspection Association, Nikkan Kogyo Shimbun, April 28, 1978, first edition, pp. 601-645

However, with the conventional method described above, only a part of the wheel tread can be magnetized, so it is difficult to confirm a crack in the entire tread.
The present invention is, in view of the above circumstances, and an object thereof is to provide a magnetic particle inspection 査装 location of railway wheel tread which the magnetic particle can be easily performed on the wheel the entire circumference of the tread.

In order to achieve the above object, the present invention provides
(1) fitted with a 4-pole type magnetic particle flaw detector fitted with a roller as the magnetic pole to the wheels of the railway vehicle, by relatively displacing the magnetic particle flaw detector of the four-pole type with the wheel, the wheel tread a magnetic particle inspection system of the entire circumference of the tread scratches magnetic particle rows of cormorants railway wheel tread, magnetic particle flaw detector quadrupole type fitted with said roller, crosswise four rollers around the body Arranged in a state, the four rollers are brought into contact with the side surface of the wheel, and four permanent magnet rollers holding the four rollers are arranged in a constricted portion on the side surface of the wheel, To do.

[ 2 ] In the magnetic particle flaw detection apparatus for a railway wheel tread described in [ 1 ] above, the support portions of the four rollers have a solid lubricant or grease.
[ 3 ] In the magnetic particle flaw inspection apparatus for a railway wheel tread described in [ 2 ] above, the axial direction of the support portions of the four rollers is arranged toward the center point of the wheel.
[ 4 ] The magnetic particle flaw inspection apparatus for a railway wheel tread described in [ 1 ], wherein the main body is separable into a plurality of parts.

According to the present invention, the following effects can be achieved.
(1) Scratches on the surface and under the surface can be easily detected over the entire circumference and all directions of the tread of the railway wheel.
(2) By fixing one of the four-pole type magnetic particle flaw detectors equipped with wheels or rollers as magnetic poles and rotating the other, it is possible to automate the magnetic particle flaw inspection and increase the efficiency of field work. Can be achieved.

  (3) By making the main body separable into a plurality of parts, a 4-pole type magnetic particle flaw detector equipped with a roller as a magnetic pole can be easily attached and detached from the wheel.

  In the magnetic particle flaw inspection apparatus for a railway wheel tread according to the present invention, a four-pole magnetic particle flaw detector attached with a roller as a magnetic pole attached to a wheel of a railway vehicle, and the wheel and the four-pole magnetic particle flaw detector are relative to each other. And a driving means for displacing. Therefore, it is possible to easily detect the surface and subsurface scratches over the entire circumference and all directions of the tread of the railway wheel.

Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is a schematic top view of a magnetic particle flaw detector for a railway wheel tread showing an embodiment of the present invention, and FIG. 2 is a front view showing a mounting state of a four-pole magnetic particle flaw detector attached with a roller as its magnetic pole to a wheel. FIG. 3 is a schematic diagram, FIG. 3 is a view taken along the line AA in FIG. 1 showing a state of mounting on the wheel, FIG. 4 is a top schematic diagram of a four-pole type magnetic particle flaw detector with a roller as its magnetic pole, FIG. FIG. 4 is an enlarged view of a support portion of the roller.

In these figures, 1 is a wheel, 2 is a wheel tread surface, 3 is a 4-pole type magnetic particle flaw detector equipped with a roller as a magnetic pole, 4 is a magnetic powder injection nozzle for spraying fluorescent magnetic powder 41 to the wheel tread surface 2, 5 Is a camera for photographing the wheel tread 2, 6 is a black light for coloring the fluorescent magnetic powder 41, 7 is a main body (resin ceramics) that assembles eight rollers, and 8 to 11 are arms that extend from the main body 7 in four directions. The arms 8 and 9 and the arms 10 and 11 are connected to each other, and the arms 8 and 9 and the arms 10 and 11 are arranged to be different from each other. 12 to 15 are first support portions connected to the tip portions of the respective arms 8 to 11, and 16 to 19 are metal members that form magnetic paths that are rotatably supported by the first support portions 12 to 15, respectively. The rollers 20 to 23 are second support portions connected to the arm 9, and 24 to 27 are permanent magnet rollers rotatably supported by the second support portions 20 to 23. The width L _{1 of the} wheel 1 is, for example, 125 mm.

  Here, the metal rollers 16 to 19 are, for example, the roller 16 is an N pole, the roller 17 is an S pole, the roller 18 is an N pole, by the magnetomotive force of the coils 31 to 34 wound around the arms 8 to 11. The roller 19 is configured to be an S pole. That is, the coil 31 wound around the arm 8 and the coil 32 wound around the arm 9 are connected in series and connected to the AC power source 35. A coil 33 wound around the arm 10 and a coil 34 wound around the arm 11 are also connected in series and connected to an AC power source 35. As shown in FIG. 5, the support portions 12 to 15 of the four rollers 16 to 19 have a solid lubricant or grease A.

  Therefore, for example, when the four-pole type magnetic particle flaw detector 3 attached with a roller as a magnetic pole is fixed and the wheel 1 is rotated, the metal rollers 16 to 19 as the magnetic pole are in contact with both side surfaces of the wheel 1. Rotate. In particular, since the permanent magnet rollers 24 to 27 arranged at the lower part are attracted to the constricted portion of the wheel 1 by magnetic force and rotated, the metal rollers 16 to 19 are held on the side surfaces of the wheel 1 and are stable. Can be rotated. The magnetic insulators or non-magnetic members 16A to 19A are connected to the first support portions 12 to 15 and the second members so that the magnetic forces of the permanent magnet rollers 24 to 27 do not interfere with the metal rollers 16 to 19 as magnetic poles. Between the support portions 20-23. Moreover, since the wheel 1 is circular and the trajectory of the side surface is also circular, the axial directions of the first support portions 12 to 15 are such that the metal rollers 16 to 19 can smoothly rotate on the trajectory. 1 (see FIG. 2B).

The distribution state of the fluorescent magnetic powder 41 colored by the black light 6 is photographed by the camera 5 over the entire wheel tread. At this time, if there is a scratch on the wheel tread 2, the fluorescent magnetic powder 41 is adsorbed to the scratch, and therefore the scratch can be detected from the captured image over the entire circumference of the tread of the railway wheel and in all directions. .
In contrast to the above-described embodiment, the wheel 1 may be fixed and the 4-pole type magnetic particle flaw detector 3 attached with a roller as a magnetic pole may be rotated in the circumferential direction of the wheel 1. That is, the four-pole type magnetic particle flaw detector 3 to which the wheel 1 and a roller as a magnetic pole are attached may be relatively moved. Therefore, it is possible to automate the magnetic particle inspection.

FIG. 6 is a perspective view of a separable main body of a magnetic particle flaw detection apparatus for a railway wheel tread showing an embodiment of the present invention.
As shown in this figure, the main body (resin ceramics) 7 of the magnetic particle flaw inspection apparatus for railroad wheel treads is composed of a first member 7A and a second member 7C so as to be separated into two parts, and the first member 7A. Is provided with a first coupling portion 7B (having a hole provided with an internal thread), and the second member 7C is provided with a second coupling portion 7D (having a hole provided with an internal thread). The first coupling portion 7B and the second coupling portion 7D are configured to be detachable with bolts 7E (having male screws). Therefore, when the magnetic particle flaw detection apparatus for railroad wheel treads according to the present invention is attached, the bolts 7E that connect the first connecting portion 7B and the second connecting portion 7D are removed, and the respective rollers are attached to both sides of the wheel 1. After positioning, it is desirable to fix and assemble the first coupling portion 7B and the second coupling portion 7D. 1 to 4, the arms 8 and 9 and the arms 10 and 11 are connected to each other, and the arms 8 and 9 and the arms 10 and 11 are arranged to be different from each other.

Although not shown, in that case, the connection lines connecting the coils 31 and 32 and the coils 33 and 34 are provided in the case where the first coupling portion 7B and the second coupling portion 7D are detached and separated. So that there is room in the length.
By configuring in this way, as shown in FIG. 7, the fluorescent magnetic powder 41 is sprayed on the wheel tread 2 as a whole, and as the magnetic poles at the tips of the arms 8 to 11 arranged in a squiggly manner around the main body 7. Since the magnetic rollers 16 to 19 can apply a magnetic field to the entire wheel tread 2, it is possible to smoothly detect tread scratches all around the wheel tread 2 and in all directions.

  In addition, since the photographing by the camera 5 is completed by one rotation of the wheel 1, the recording data can be easily acquired, which can contribute to efficiency in field work.

Magnetic particle inspection 査装 location of railway wheel tread of the present invention can be used as a magnetic particle inspection 査装 location convenient enables automatic measurement of at railway wheel tread.

It is an upper surface schematic diagram of the magnetic particle flaw inspection apparatus of the railway wheel tread which shows the Example of this invention. It is a front schematic diagram which shows the mounting state to the wheel of the 4-pole type magnetic particle flaw detector which attached the roller as a magnetic pole of the magnetic particle flaw inspection apparatus of the railway wheel tread which shows the Example of this invention. It is the AA arrow directional view of FIG. 1 which shows the mounting state to the wheel of the magnetic particle flaw inspection apparatus of the railway wheel tread which shows the Example of this invention. It is an upper surface schematic diagram of the 4-pole type magnetic particle flaw detector which attached the roller as a magnetic pole of the magnetic particle flaw inspection apparatus of the railway wheel tread which shows the Example of this invention. It is an enlarged view of the support part of the roller of the magnetic particle flaw inspection apparatus of the railway wheel tread which shows the Example of this invention. It is a perspective view of the main part made separable of the magnetic particle flaw inspection apparatus of the railway wheel tread which shows the Example of this invention. It is a schematic diagram which shows the condition of the magnetic particle flaw inspection of the railway wheel tread which shows the Example of this invention.

DESCRIPTION OF SYMBOLS 1 Wheel O Wheel center point 2 Wheel tread 3 4 pole type magnetic particle flaw detector which attached the roller as a magnetic pole 4 Magnetic particle injection nozzle 5 Camera 6 Blacklight 7 The main body which forms 8 rollers 7A 1st member 7B 1st the coupling portion 7C second member 7D second coupling portion 7E bolt 8-11 arms 12 to 15 the first support portion 16 to 19 metallic roller 16A~19A magnetic insulator or non-magnetic material extending in four directions from the body A Solid lubricant or grease 20-23 Second support 24-27 Permanent magnet rollers 31-34 Coil 35 AC power supply 41 Fluorescent magnetic powder

Claims (4)

By mounting a four-pole type magnetic particle flaw detector with a roller as a magnetic pole attached to a wheel of a railway vehicle, and relatively displacing the wheel and the four-pole type magnetic particle flaw detector, the tread of the entire circumference of the wheel tread the magnetic particle of the flaw a magnetic particle inspection device rows as the Hare railway wheel tread, magnetic particle flaw detector quadrupole type fitted with said rollers, arranged four rollers crosswise state around the body The four wheels are brought into contact with the side surface of the wheel, and four permanent magnet rollers for holding the four rollers are arranged in a constricted portion on the side surface of the wheel. Magnetic particle inspection equipment for treads. 2. A magnetic particle flaw inspection apparatus for railway wheel treads according to claim 1 , wherein the four roller supporting portions have solid lubricant or grease. 3. A magnetic particle flaw inspection apparatus for a railway wheel tread according to claim 2 , wherein the axial direction of the support portions of the four rollers is arranged toward the center point of the wheel. . The magnetic particle flaw inspection apparatus for a railway wheel tread according to claim 1 , wherein the main body is separable into a plurality of parts.

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