JPH0637763U - Bearing roller rotation device for eddy current inspection - Google Patents

Abstract

(57) [Summary] [Purpose] Rotate the bearing roller while securely supporting it. [Structure] A pair of driven rollers 7, 7 extending substantially in parallel so that a bearing roller 2 to be subjected to flaw detection inspection can be placed.
A rotatably supported support member 15, and an elastic body 9 for urging the driven rollers 7, 7 upward via the support device 15.
The driven rollers 7, 7 are provided above the driven rollers 7, 7 and the driving roller 10 parallel to the driven rollers 7, 7, and the bearing roller 2 is connected to the driven rollers 7, 7 and the driving roller 10.
The bearing roller 2 is rotated by gripping with and rotating the drive roller 10.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bearing roller rotating device for eddy current flaw detection inspection.

[0002]

[Prior art]

 Non-destructive inspection of bearing rollers is carried out when manufacturing bearings used in aircraft engines, but in recent years, there is a demand for non-destructive inspection of bearing rollers by eddy current flaw detection.

The eddy current flaw detection test will be briefly described. In the eddy current flaw detection test, a probe in which a Teflon tape is attached to the tip of the coil is used.

When an alternating current is applied to this probe and the probe is placed in the vicinity of a test body (metal) to be subjected to flaw detection inspection, and the test body is moved relative to the probe, an eddy current is generated in the test body. If a defect such as a flaw is generated on the surface of the test body, the defect becomes a resistance, the value of the eddy current changes, and the impedance of the probe changes.

Therefore, by monitoring whether or not the impedance of the probe changes, it can be determined whether or not a defect has occurred on the surface of the test object.

In addition, in the above-described eddy current flaw detection inspection, it is possible to stably detect defects that are smaller when the probe is brought into contact with the test body.

On the other hand, when the above-mentioned eddy current flaw detection is applied to the non-destructive inspection of the bearing roller of the bearing of the aircraft engine, a means for moving the bearing roller to be subjected to flaw detection relative to the probe is required. Become.

As such means, for example, as shown in FIG. 4, a bearing roller 2 as a test body is placed at the center of a rotary table 1 which rotates in a horizontal plane, with its end face oriented vertically, and a core is placed. It is conceivable to bring the probe 3 closer to the outer peripheral surface of the bearing roller 2 after taking it out.

[0009]

[Problems to be solved by the device]

 However, when the probe 3 is brought into contact with the bearing roller 2 mounted on the rotary table 1 as shown in FIG. 4, the bearing roller 2 centered and mounted on the rotary table 1 is misaligned, and The proper contact state with the bearing roller 2 of No. 3 cannot be maintained.

Therefore, it is conceivable to provide a jig for fixing the lower part of the bearing roller 2 to the center of the rotary table 1. When such a jig is used, the bearing roller 2 is fixed by the jig. In order to inspect the existing portion, it is necessary to turn the bearing roller 2 upside down and fix it again, which causes a problem that the entire width of the outer peripheral surface of the bearing roller 2 cannot be detected at once.

The present invention has been made in view of the above-mentioned circumstances, and can reliably support the bearing roller without gripping the bearing roller with a jig and prevent misalignment of the bearing roller. It is an object of the present invention to provide a bearing roller rotating device for eddy current flaw detection inspection.

[0012]

[Means for Solving the Problems]

 In order to achieve the above object, the bearing roller rotating device for eddy current flaw detection of the present invention rotatably supports a pair of driven rollers extending substantially in parallel so that the bearing roller to be subjected to flaw detection can be placed. The supporting member, an elastic body for urging each driven roller upward via the supporting member, and a drive roller arranged above the driven roller and parallel to each driven roller. .

Similarly, in the bearing roller rotating device for eddy current flaw detection of the present invention, a pair of driven rollers extending substantially parallel to each other are rotatably supported so that a bearing roller for flaw detection inspection can be placed. A tool, a driving roller disposed above the driven rollers and parallel to the driven rollers, and an elevating device for elevating the driving rollers.

[0014]

[Action]

 In the bearing roller rotating device for eddy current flaw detection of the present invention, a pair of driven rollers provided on the support tool supports the bearing roller to be subjected to flaw detection, and the elastic body urges the support tool. The bearing roller is brought into contact with the driving roller, and the bearing roller is rolled by rotating the driving roller.

Further, in the eddy current flaw detection bearing roller rotating device of the present invention, the bearing roller to be subjected to flaw detection is supported by the pair of driven rollers provided on the support, and the ascending / descending device is operated to drive the drive roller. Is brought into contact with the bearing roller, and the bearing roller is rolled by rotating the drive roller.

[0016]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a first embodiment of a bearing roller rotating device for eddy current flaw detection of the present invention. Reference numeral 6 denotes a bracket provided on the upper surface of a substrate 12 by a pin 11 whose base end 4 extends substantially horizontally. A lever 7 is pivotally supported by 13, a pair of driven rollers 7 and 7 are rotatably supported on the tip 5 of the lever 6 by pins 14 and 14 which are substantially parallel to the pin 11, and 9 is the substrate 12 Is a coil spring (compression spring) which is provided between the lever 6 and the lever 6 and urges the lever 6 upward, and the lever 6, the driven rollers 7 and 7, the coil spring 9 and the like constitute a supporting member 15. .

A gap 8 is formed between the driven rollers 7 and 7 in which the bearing roller 2 to be subjected to flaw detection inspection can be placed.

Reference numeral 10 denotes a driving roller which is disposed above the driven rollers 7 and 7 and which is parallel to the driven rollers 7 and 7. The driving roller 10 transmits the rotational force of a motor (not shown). It has become so.

Reference numeral 3 in the drawing indicates an eddy current flaw detection probe.

The operation of this embodiment will be described below.

When the bearing roller 2 is to be inspected for flaws, the bearing roller 2 is disposed in the gap 8 between the pair of driven rollers 7 and 7 so that the bearing roller 2 is attached to the driven rollers 7 and 7. Support.

At this time, since the lever 6 is biased upward by the repulsive force of the coil spring 9, the bearing roller 2 is pushed up via the lever 6 and the driven rollers 7 and 7, and the driving roller is driven. The bearing roller 2 comes into contact with 10.

Further, when the drive roller 10 is rotated by a motor (not shown), the bearing roller 2 is rotated along with the rotation of the drive roller 10.

In this state, the tip of the probe 3 is brought into contact with the outer peripheral surface of the bearing roller 2 and the change in the impedance of the probe 3 is monitored to determine the presence or absence of a defect on the outer peripheral surface of the bearing roller 2. .

Since the bearing roller 2 that performs the flaw detection inspection rotates in a state that it is reliably gripped by the pair of driven rollers 7 and 7 and the driving roller 10, the probe 3 can always be pressed against the bearing roller 2. It is possible, and the reliability of eddy current flaw detection is greatly improved.

FIG. 2 shows a second embodiment of the bearing roller rotating device for eddy current flaw detection of the present invention. In this embodiment, the coil spring 9 shown in FIG. The coil spring 16 (tensile spring) is provided, and the lower end portion of the coil spring 16 is engaged with the lever 6 and the upper end portion thereof is engaged with the substrate 12, respectively. The same effect as that of the embodiment shown in FIG. 1 can be obtained.

FIG. 3 shows a third embodiment of the bearing roller rotating device for eddy current flaw detection of the present invention. Reference numerals 17 and 17 denote pins 19 and 19 which are substantially horizontal to a bracket 18 provided on the substrate 12, respectively. It is a pair of driven rollers that are rotatably supported and are parallel to each other. These driven rollers 17, 17, the bracket 18, and the like form a support tool 20.

A gap 21 is formed between the driven rollers 17, 17 on which the bearing roller 2 to be subjected to flaw detection inspection can be placed.

Reference numeral 22 is a drive roller which is arranged above the driven rollers 17 and 17 and which is vertically movable so as to be parallel to the driven rollers 17 and 17. Reference numeral 23 is a cylinder device (elevating device) for moving the drive rollers 22 up and down. The driving roller 22 is adapted to transmit the rotating force of a motor (not shown).

Reference numeral 3 in the figure shows an eddy current flaw detection probe.

The operation of this embodiment will be described below.

When performing a flaw detection inspection of the bearing roller 2, the bearing roller 2 is supported by the driven roller 17, 17 by disposing the bearing roller 2 in the gap 21 between the pair of driven rollers 17, 17. Let

Then, the cylinder device 23 is operated to bring the drive roller 22 into contact with the bearing roller 2 and the drive roller 22 is rotated by a motor (not shown). With this, the bearing roller 2 rotates.

In this state, the tip of the probe 3 is brought into contact with the outer peripheral surface of the bearing roller 2 and the change in the current value of the probe 3 is monitored to determine the presence or absence of a defect on the outer peripheral surface of the bearing roller 2. To do.

The bearing roller 2 for the flaw detection inspection rotates while being reliably gripped by the pair of driven rollers 17 and 17 and the drive roller 22, so that the probe 3 is constantly mounted on the bearing roller 2. Since it is possible to press, the reliability of eddy current flaw detection is greatly improved.

The bearing roller rotating device for eddy current flaw detection according to the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. Is.

[0038]

[Effect of device]

 In any of the eddy current flaw detection bearing ring roller rotating apparatus according to the first and second aspects of the present invention, a pair of driven rollers extending substantially parallel to each other can be mounted on the bearing roller to be subjected to flaw detection. Since the bearing rollers can be held and rotated by the driven rollers parallel to the driven rollers arranged between the driven rollers, the probe is pressed against the bearing rollers during the flaw inspection. Therefore, it is possible to achieve an excellent effect that the reliability of the eddy current flaw detection inspection is significantly improved.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a first embodiment of a bearing roller rotating device for eddy current flaw detection inspection of the present invention.

FIG. 2 is a conceptual view showing a second embodiment of the bearing roller rotating device for eddy current flaw detection inspection of the present invention.

FIG. 3 is a conceptual view showing a third embodiment of the bearing roller rotating device for eddy current flaw detection inspection of the present invention.

FIG. 4 is a conceptual diagram showing an example of eddy current flaw detection inspection means for a bearing roller that has been conventionally studied.

[Explanation of symbols]

 2 Bearing roller 7,17 Driven roller 9,16 Coil spring (elastic body) 10,22 Drive roller 15,20 Support tool 23 Cylinder device (elevating device)

Claims (2)

[Scope of utility model registration request] 1. A support tool that rotatably supports a pair of driven rollers that extend substantially in parallel so that a bearing roller to be subjected to a flaw detection inspection can be placed, and each driven roller is attached upward through the support tool. A bearing roller rotating device for eddy current flaw detection, comprising a biasing elastic body and a driving roller arranged above the driven rollers and parallel to the driven rollers. 2. A support tool that rotatably supports a pair of driven rollers extending substantially in parallel so that a bearing roller to be subjected to a flaw detection inspection can be placed, and each driven member disposed above the driven rollers. A bearing roller rotating device for eddy current flaw detection inspection, comprising: a drive roller parallel to the roller; and an elevating device for elevating the drive roller.