JPH06242088A - Flaw detector - Google Patents

Abstract

PURPOSE:To allow stabilized flaw detection even for a member having significant deformation by disposing a V roller on the center of a probe in the carrying direction of the member to be inspected thereby minimizing the undetected region in front and rear of the member. CONSTITUTION:A V roller 9 having a single wheel is rotary supported on a frame 10. The frame 10 is held by a saddle 14 rotary supported by an arm 5. The roller 9 is disposed on the center line of a flaw detecting head 1 in the carrying direction and comes into contact with a member to be detected (rectangular billet) 8 across a roof formed by two upper faces thereof so that the head 1 follows up the member 8 while keeping a constant interval. Consequently, undetected region of the member 8 can be minimized. Since the roller 9 comes into line contact with the member 8, an actuator 2 pan press the head 1 at right angle against the flaw detecting face of the member 8 regardless of bent or deformation of the member 8 thus allowing the head 1 to follow up a bent or deformation of the member 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flaw detection device for automatically performing flaw detection on a rod-shaped test material such as a square billet in the longitudinal direction by ultrasonic waves.

[0002]

2. Description of the Related Art FIG. 3 is a front view showing a conventional flaw detection device, and FIG. 4 is a partial cross-sectional view seen from the side of FIG. In the figure, 1 is a flaw detection head having an ultrasonic probe and a gimbal mechanism, 2 is an actuator for contacting and separating the flaw detection head, 3 is a first saddle for supporting the actuator,
Reference numeral 4 denotes a roller for making the first saddle follow the material to be inspected while keeping a certain distance, 5 an arm for rotatably supporting and connecting the flaw detection head 1 and the first saddle 3, and 6 a first A centering mechanism for constantly positioning the saddle 3 at the center with respect to the bending of the material to be tested, a contact / separation material mechanism 7 for contacting / separating the roller 4, and a material 8 for inspection. The conventional flaw detection device is configured as described above, and the test material 8 is covered by the roller 4
It is possible to follow the surface texture of the test material 8 by bringing the first saddle 3 into contact with the test material 8 via the and then pressing the flaw detection head 1 against the test material 8 by the actuator 2.

[0003]

The conventional flaw detector as described above has the following problems. Normally, the material to be inspected is cut into a predetermined length by a shear or a grinder, and therefore, the material to be inspected 8 is conveyed with burrs 12 generated before and after it. Therefore, in the conventional flaw detection apparatus, in order to reduce the size of the non-flawed area 13, the roller 4 and the flaw detection head 1 are contacted with each other so that the end surface of the material 8 is positioned between them. As a result, stable flaw detection cannot be performed and there is a risk of damaging the first saddle 3.
Therefore, since the outer surface of the roller 4 is contacted with the end surface of the material to be inspected 8 so as to be located, the undetected area 13 becomes large. Further, since the rollers 4 are located at four positions in the front, rear, left, and right, all the rollers 4 may not come into contact with the material to be inspected due to the structure, for the material to be inspected having a large amount of bending or deformation.
There is a problem in that stable flaw detection cannot be performed, such as the flaw detection head 1 being lifted because the distance between the test material 8 and the first saddle 3 is not constant. The present invention has been made to solve the above problems, and an object of the present invention is to provide a flaw detection apparatus capable of performing flaw detection even on a test material having a small undetected area and a large deformation amount, and capable of stable flaw detection.

[0004]

A flaw detection apparatus according to the present invention is provided with a V roller on the center of the probe in the conveyance direction of a material to be detected.

[0005]

In the flaw detector according to the present invention, the V-roller is located on the center of the probe, so that the undetected area is minimized.

[0006]

【Example】

Example 1. 1 is a front view showing an embodiment of the present invention, and FIG. 2 is a side view of FIG. 1-2 in the figure,
5 to 8 are exactly the same as the above-mentioned conventional devices. 9 is a V roller for keeping the distance between the flaw detection head 1 and the test material 8 constant, 10 is a frame for rotatably supporting the V roller 9, 14 is a second saddle for holding the frame 10 and rotatably supporting the arm 5. Is. In the flaw detection device configured as described above, the contacting / separating material is contacted and separated by the same mechanism as in the conventional device. Further, in the flaw detection apparatus configured as described above, the V roller 9 for causing the flaw detection head 1 to follow the material to be inspected 8 while maintaining a constant space when contacting the material is located on the center of the probe in the transport direction. Therefore, the undetected flaw regions before and after the test material 8 can be minimized. Further, even with respect to the material to be inspected 8 having a large amount of bending or deformation, the V roller 9 is in line contact with the material to be inspected 8 at a position on the center line in the transport direction of the flaw detection head. The flaw detection head 1 can be moved by the actuator 2 without being affected by bending or deformation.
Since it can be pressed at a right angle to the flaw detection surface of the test material 8, it is possible to follow the bending and deformation of the test material 8.

[0007]

As described above, according to the present invention, since the V roller is arranged on the center line of the probe, the undetected region before and after the test material can be minimized without being affected by the burr of the test material. There is an effect.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a flaw detector according to the present invention.

2 is a side view of what is shown in FIG. 1. FIG.

FIG. 3 is a front view showing a conventional flaw detection device.

FIG. 4 is a partial cross-sectional view of what is shown in FIG.

[Explanation of Codes] 1 flaw detection head 2 actuator 3 first saddle 4 roller 5 arm 6 centering mechanism 7 contact / separator mechanism 8 material to be inspected 9 V roller 10 frame 11 rotating shaft 12 burr 13 uninspected area 14 second saddle

Claims (1)

[Claims] 1. A flaw detection device for performing flaw detection by reciprocating in the longitudinal direction of a test material by causing a flaw detection head to always follow the surface of a rod-shaped test material such as a square billet supplied in a diamond shape, A contact / separation mechanism consisting of an air cylinder, a centering mechanism attached to the lower end of the contact / separation mechanism, and horizontally movable in the direction orthogonal to the conveyance, and a lower part of the centering mechanism. The saddle having the shape of, the arm rotatably supported and attached to both sides of the saddle, the flaw detection head having a probe having a gimbal mechanism rotatably supported at the tip of the arm, and the flaw detection head described above. An actuator for contacting and separating the material to be inspected, and a material to be contacted across the roof formed by the two upper surfaces of the material to be inspected, which is arranged on the center line in the transport direction of the flaw detection head,
A flaw detection device comprising a V roller formed of one wheel for holding a distance between the saddle and a material to be inspected, and a frame holding the V roller on the saddle.