JPH05281209A - Probe retention device of ultrasonic flaw-detection apparatus - Google Patents

Abstract

PURPOSE:To enhance the inspection accuracy of the title apparatus by providing the following: a plate body one piece of which has been fixed to the upper part of a magnet base; and a thumbscrew bolt which is screwed to the other piece of the plate body and which is provided with a retention plate supporting a probe at the tip. CONSTITUTION:A permanent magnet 11 is turned by means of a knob 12; an object 1 under test is separated from, and brought into contact with, a magnet base 4 freely by means of a magnetic force. A probe 2 is placed under a rubber packing 10; the probe 2 is supported and fixed by using a thumbscrew bolt 8. At the probe 2 which has been supported and fixed by using the bolt 8 via the packing 10, the pressure of the contact face with the object 1 under test is made definite; waveforms which are observed are made definite without being changed; the measuring accuracy of the title apparatus is made good. Even when the inspection part of the object 1 under test is changed, the base 4 can be separated from, and brought into contact with, the object 1 under test easily only by turning the knob 12 of the base 3. In addition, since the pressure of the contact face with the object 1 under test can be maintained to be definite, an irregularity in the inspection accuracy is noy caused even when the inspection part is changed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a probe pressing device of an ultrasonic flaw detection device for flaw detection of an object to be inspected using ultrasonic waves.

[0002]

2. Description of the Related Art FIG. 4 is a perspective view of a conventional ultrasonic flaw detector which holds a probe by hand. In the figure, 1 is an object to be inspected such as a metal material, 2 is an object to be inspected, and a thickness of the object to be inspected 1. The probe 3 of the ultrasonic flaw detector for inspecting the measurement of the thickness and the determination of the material is a hand for holding the probe 2.

Next, the operation will be described. Generally, inspecting the inside of large-sized thick parts that are difficult to inspect by radiation or electromagnetic methods, ultrasonic waves with a frequency of about 15 kHz or more are incident on the inside of large-sized parts to be inspected, This can be achieved by observing the waveform of the propagating ultrasonic wave reflected from a defect on the way and inspecting the time and magnitude of the waveform. This method is called an ultrasonic inspection method.
In FIG. 4, ultrasonic waves are made incident on the inside of the inspection object 1 by the probe 2 to inspect the inspection object 1 for flaw detection. In addition, as an approximate technical document, "ultrasonic inspection method" (electrical application measurement electromagnetic measurement v p255-25
8 The Institute of Electrical Engineers of Japan, published on May 15, 1963).

[0004]

Since the conventional ultrasonic flaw detector is constructed as described above, the probe 2 must be manually pressed against the object to be inspected 1, and the object to be inspected 1 is to be inspected. Since the contact of the probe 2 is not constant, the observed waveform is not constant and the inspection accuracy is deteriorated.

The present invention has been made to solve the above-mentioned problems, and the contact pressure of the probe with respect to the object to be inspected becomes constant, and the probe of the ultrasonic flaw detector with high inspection accuracy is provided. The purpose is to obtain a holding device.

[0006]

DISCLOSURE OF THE INVENTION A probe pressing device for an ultrasonic flaw detector according to the present invention is a magnet base which is rotatable and in contact with an object to be inspected, and a magnet base thereof. A plate body, one piece of which is fixed to the upper part of the spout, and a thumbscrew bolt, which has a holding plate for screwing the other piece of the plate body to support the probe at the tip, are provided.

[0007]

Since the probe pressing device of the ultrasonic flaw detector according to the present invention supports the probe by the pressing plate adjusted by the wing screw bolt, the pressure on the contact surface between the probe and the object to be inspected is reduced. Keep it constant. Further, the thumbscrew bolt screwed to the plate body can be supported even if the size of the probe is changed by adjusting the screw.

[0008]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 2 is a flaw detection and thickness measurement of the inspection object,
Ultrasonic flaw detector probe for inspecting material judgment, 4
Is a magnet base 5 which has a built-in magnet and can be freely contacted to and separated from the object to be inspected. Reference numeral 5 is a cylindrical body. Body, 8
Is a thumbscrew bolt screwed to the other piece of the plate 6, 9 is a holding plate provided at the tip of the thumbscrew bolt 8, and 10 is a rubber packing.

Next, the operation will be described. When inspecting the inspection object 1 for flaw detection, first, the magnet base 4 is attached to the inspection object 1. 2A and 2B are explanatory views showing the operation of the magnet base. FIG. 2A shows the state of attachment to the inspection object 1 and FIG. 2B shows the state of removal from the inspection object 1. 1
Reference numeral 1 denotes a permanent magnet (magnet), and this permanent magnet 11 is rotated by a knob 12 so that the object to be inspected 1 and the magnet base 4 can be freely contacted and separated by a magnetic force.

Next, as shown in FIG. 1, the probe 2 is placed under the rubber packing 10, and the probe 2 is supported and fixed by the thumbscrew bolt 8. The probe 2 supported and fixed by the thumbscrew bolts 8 via the rubber packing 10 has a constant pressure on the contact surface with the inspection object 1, and the waveform to be observed is constant without fluctuation, thus improving the inspection accuracy. Will get better. Further, even when the inspection location of the inspection object 1 is changed, it can be easily separated from and contacted with the inspection object 1 only by rotating the knob 12 of the magnetic base 4, and the pressure of the contact surface with the inspection object 1 is also increased. Since it can be maintained constant, the inspection accuracy does not vary even if the inspection location is changed.

When a probe having a different shape, for example, a small probe 2a as shown in FIG. 3, is used, the hexagon bolt 7 is temporarily removed and the tubular body 5 is replaced with the upper portion of the plate body 6. Then attach hexagon bolt 7 again, and thumbscrew bolt 8
The probe 2a is supported and fixed by. With such a configuration, probes of various sizes can be supported and fixed by one probe pressing device.

[0012]

As described above, according to the present invention, a magnet base which can be freely contacted with and separated from an object to be inspected by rotating a magnet, and a plate whose one piece is fixed to the upper portion of the magnet base. Since it has a body and a thumbscrew bolt having a holding plate for supporting the probe at the tip screwed to the other piece of the plate body, it can be easily brought into and out of contact with the object to be inspected, and Since the pressure of the contact surface with the inspection object can be kept constant, the inspection accuracy is high, and even if the inspection position is changed, the inspection accuracy does not vary. There is an effect that a probe pressing device of an ultrasonic flaw detector which can be easily supported even if the size of the child is changed is obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a probe pressing device of an ultrasonic flaw detector according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing the operation of the magnet base.

FIG. 3 is a perspective view showing a case where probes having different shapes are supported.

FIG. 4 is a perspective view in which a probe of a conventional ultrasonic flaw detector is held down by hand.

[Explanation of symbols]

 1 inspected object 4 magnet base 6 plate body 8 thumbscrew bolt 9 holding plate 11 permanent magnet (magnet)

Claims (1)

[Claims] 1. A magnet base having a built-in magnet, which is rotatable with respect to an object to be inspected by rotating the magnet, and a plate body of which one piece is fixed to the upper part of the magnet base.
A probe pressing device for an ultrasonic flaw detection device, comprising: a thumbscrew bolt having a pressing plate at the tip and screwed to another piece of the plate body.