JPS5916831Y2 - flaw detection equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a flaw detection device for detecting defects on the outer surface of plates, square billets, etc., and particularly relates to a flaw detection device for detecting defects on flat surfaces of plates, square billets, etc.

When performing flaw detection on a flat surface such as a plate or square billet, it is necessary to arrange the detector along this plane and move it in a direction perpendicular to the flaw to be detected.

The detector must always maintain a predetermined distance from the surface to be detected.

By the way, when detecting flaws on the outer surface of an actual board or square billet, the board or square billet is deformed or placed at an angle to maintain the predetermined position between the detector and the surface to be tested. It's difficult.

In view of the above, the purpose of this invention is to provide an improved flaw detection device that has a simple mechanism but always maintains a predetermined distance from the surface of the material to be inspected and performs stable and reliable flaw detection functions. shall be.

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a side view, in which a detection unit 10 detects flaws on the surface constituting one side of a square billet 1.

An excitation part 20 is provided on the surface constituting the other side of the square billet 1.
is located.

This excitation section 20 is equipped with a high frequency magnet 21,
The flaw detection surface is excited.

The detection section 10 and the excitation section 20 are connected to the frame 3, respectively.
This frame 31 is held by a predetermined follow-up mechanism 32 so that its flat roller 33 is pressed against the surface of the square billet 1.

In this way, a predetermined surface of the square billet 1 running on the line is inspected for flaws.

This detection unit 10 will be further explained in detail with reference to FIGS. 2, 3, and 4.

Figure 2 is an enlarged view of a part of Figure 1, Figure 3 is a bottom view seen from below in Figure 2, and Figure 4 is a front view seen from the right side of Figure 2. .

, - As shown in these figures, the detection unit 10 is, for example, an SM
It is equipped with five detectors 11 made of magnetically sensitive elements such as D, and each detector 11 is held by a separate parallelogram link mechanism 12.

Each parallelogram link mechanism 12 is given elasticity by a spring 16 or the like, so that each detector 11 is pressed against the surface of the square billet 1.

Each link mechanism 12 is attached to a frame 17, and this frame 17 is attached to a slide block 18.

This slide block 18 is fitted into the slide guide rod 15 and can freely slide along the axial direction of this guide rod 15.

A crank mechanism 14 is connected to the slide block 18, and the crank mechanism 14 is connected to the rotating shaft of the motor 13 via a predetermined speed reduction mechanism.

Therefore, the crank mechanism 14 is actuated by the rotation of the motor 13, and the slide block 18 vibrates from side to side in FIG. 3.

Therefore, the five detectors 11 are simultaneously moved in a direction perpendicular to the running direction of the square billet 1.

Therefore, all the predetermined flaw detection surfaces of the square billet 1 are scanned.

As described above, in the flaw detection device according to the present invention, since the detectors 11 are held by the planar quadrilateral link mechanisms 12 which are individually elasticized, for example, as shown in FIG. 1 is tilted and its detection surface is no longer parallel to the detector 11, each detector 11 is held separately, so it will not be separated from the detection surface and there will be no gap. An extremely stable detection function can be achieved with a simple configuration.

Note that this invention is not limited to the one embodiment described above, but can be modified as shown in FIG. 6, for example.

That is, in FIG. 6, a slide block 18 that can freely slide on a guide rod 15 or rail is attached to a frame 17 (link mechanism base) to which the link mechanism 12 is attached. 18 is adapted to be vibrated by a link mechanism 19.

In the case of FIG. 6, durability can be increased by eliminating the sliding part and connecting only with a pin joint.

As described above, the present invention can be configured in various ways without departing from the essential features of the present invention.

As explained in the embodiments above, according to this invention, a detector is supported by each of a plurality of parallelogram link mechanisms attached to a slide block, and the slide block is reciprocated by a crank mechanism. With this mechanism, multiple detectors can be vibrated on the surface of the material to be inspected while maintaining a constant distance between them, making it possible to achieve stable and reliable flaw detection operations.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, with Figure 1 being a side view, Figure 2 being a partially enlarged view of Figure 1, and Figure 3 being a bottom view of Figure 2 as seen from below. , FIG. 4 is a front view seen from the right side of FIG. 2, FIG. 5 is a front view for explaining the operation of the embodiment, and FIG. 6 is a bottom view showing another embodiment. 1... Material to be inspected, 10... Detection section, 1
1...Detector, 12...Parallelogram link mechanism, 13...Motor, 14...
Crank mechanism, 15...Slide guide rod, 1
6...Spring, 17...Frame, 18
...Slide block, 19 ... Link mechanism, 20 ... Excitation section, 21 ... High frequency magnet, 31 ... Frame, 32 ...・
...Following mechanism, 33...Flat roller.

Claims (1)

[Scope of utility model registration request] multiple parallelogram link mechanisms arranged in parallel;
A plurality of detectors each supported by each of these parallelogram link mechanisms, and a plurality of detectors each urging each of the parallelogram link mechanisms to press each of the detectors against the surface of the material to be inspected. an elastic member, a slide block to which the bases of the plurality of parallelogram ring mechanisms are attached, a slide guide rod that holds the slide block in a freely sliding manner, and the slide block is attached to the slide guide rod. a crank mechanism that causes the plurality of detectors to vibrate on the surface of the material to be inspected by reciprocating along the