JPS5831866B2 - Steel magnetic flaw detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a magnetic flaw detector for square steel materials.

When performing magnetic flaw detection on the surface of steel materials such as steel pipes and round bars, the surface of the detector can be easily scanned by applying rotation to the material being tested, but this is difficult in the case of square materials. In the end, in the case of a rectangular billet, a separate detector must be used to face each of the four flat surfaces to be detected, resulting in a complicated structure and the need to operate the flaw detection settings of the detector. It also requires complicated means, and it is difficult to clean and maintain the flaw detector, replace and adjust parts, and repair.

Furthermore, when the entire flaw detector is removed from the material to be inspected for this work, a large evacuation area is required, resulting in extremely poor space efficiency in the factory.

This invention was developed in order to eliminate the above-mentioned drawbacks.The present invention was developed to eliminate the above-mentioned drawbacks. Separate carts are installed on both the left and right sides, each of which can move forward and backward on guide rails via pneumatic cylinders. The support frame is attached via another pneumatic cylinder so that it can move forward and backward in the horizontal direction, and the detector housing support frame is further coupled via the pneumatic cylinder so that it can move up and down in the vertical direction with respect to the machine frame, With respect to the detector support frame, the detector casing...
This relates to a steel magnetic flaw detector characterized in that the magnetic flaw detector is mounted so that it can scan and move parallel to the surface to be detected in a state where it directly faces the surface.

Next, embodiments of the present invention will be sequentially described.

FIG. 1 is a layout diagram of a steel material to be inspected and a magnetic detector.

In the figure, 1 and 1' are magnetic detectors, and 2 is a square steel material to be tested.

3 is an electromagnet used to magnetize the subject 2;

In this example, as shown in the figure, the electromagnet 3 is placed at a position where the steel material 2 is magnetized by sandwiching the opposing sides of the object 2 82t82'.
Detectors 1 and 1' are set at positions facing the surface 81, and flaw detection can be performed on both surfaces at the same time.

Furthermore, flaw detection on the S2 and S2' planes of the object 2 is performed by arranging electromagnets and detectors at positions symmetrical to those in FIG.

(Not shown) Therefore, in order to continuously detect flaws on all four sides of the steel material, two sets of the flaw detectors shown in this figure should be installed on the left and right sides in the longitudinal direction of the specimen.
This means that each of the two pages will be addressed separately.

Next, FIG. 2 is a side view of a steel material flaw detector according to an embodiment of the present invention.

In the figure, 15, 15'', 15', and 15'' are the detector casings, and there are two on the left and right, and a magnetic detector 1°1.1.1 is provided inside each of them.

2 is a steel material to be inspected, and 4 is a V roller.

In FIG. 2, the steel material 2 to be inspected is fed forward by the roller 4 (2).

5 is the right truck, 5' is the left truck, and 6 and 6' are guide rails.

The carriages 5, 5' move back and forth along the guide rails 6, 6'1 toward the center, and this movement is effected by pneumatic cylinders 7, 7'.

A pneumatic truck cylinder 7,7' is provided on the outside of the lower part of each truck.

8.8' is a stopper when entering the center of the bogies 5, 5'.

Reference numeral 9.9' denotes a machine frame that is fixed to the truck, and this machine frame has a detector housing support frame 20 at a position facing the steel material 2 to be inspected.
．． 20' is attached via a pneumatic cylinder 14 so as to be movable forward and backward.

The detector housing support frame is also attached to the machine frames 9, 9' so as to be movable in the vertical direction via pneumatic cylinders 13, 13'.

With these mechanisms, the detector housing support frame 20.degree. 21' can be roughly moved horizontally by the cart, and finely moved vertically and horizontally by the pneumatic cylinder mechanisms 13 and 14.

12 is a tension spring for weight balance and a detection case support frame 20.
20' is hanging.

Each of the detector casings 15, 15", 15", and 15' has a magnetic detector 1 built therein, and the detection surface of the detector is located at a fixed angle with respect to the horizontal direction. installed on the detector housing support frame 20, 20' in a direction directly facing the
Furthermore, this detector housing 15... is directly opposed to the steel material 2 to be inspected.
The detector is mounted on the detector housing support frame 20° 20' so as to be able to scan parallel to the surface of the detector.

From the operating order of this flaw detector, first the trolley is 5.5'.
Use the pneumatic cylinder 7.7' for the bogie to stop the stopper 8 in the center.
. Detector housing support frame 20 is pushed out toward the central specimen steel material.
．． 20' moves in the horizontal direction, and the detector housings 15.degree. 15'' (or 15', 15'') attached to the top and bottom of the front surface come into contact with the opposing surface of the steel material 2 to be inspected and are pressed even more strongly.

The steel material to be tested is sometimes twisted by about 2 to 3 degrees, so it is necessary to forcefully press the detector casing so that the magnetic detector is fully aligned with the opposing surface.

After completing the setting of the magnetic detection device section as described above, each magnetic detector is moved parallel to the surface of the square billet of the test object in a direction perpendicular to the longitudinal direction of the test object 2 using a separately equipped magnetic detector swinging device. perform scanning motion to perform flaw detection.
Flaw detection is performed by inspecting and monitoring the resulting changes in magnetic flux using output signals.

In the above explanation, the flaw detector was described using a square steel material as an example to be inspected, but it can also be applied to simultaneous flaw detection from the left and right sides of rectangular steel materials and shaped steel materials that are adjacent at a certain angle. The scope of application from this perspective is extremely wide.

Since the present invention is constructed as described above, the left and right detector devices can be separately moved forward and backward relative to the position of the steel material to be inspected, and the opposing position relative to the object to be inspected can be set accurately and with high precision. In addition to simplifying the detector mounting structure, it is also easier to set the detector for flaw detection on the test object.
It becomes easier to clean and maintain the flaw detector, replace parts, adjust and repair, and it also reduces the evacuation area for removing the entire flaw detector from the test material during these operations, making it easier to install the flaw detector. This made it possible to increase the space efficiency of the factory.

[Brief explanation of drawings]

Figure 1: Relationship between the object corner billet and the magnetic detector,
FIG. 2 is a side view of a flaw detector according to an embodiment of the present invention. 1.1', 1"1///...Magnetic detector, 2.
...Steel material to be tested, 3...Electromagnetic force, 4...
...■Roller, 5...Right truck, 5'...
...Left truck, 6,6'...Guide rail, 7
．． 7'...Pneumatic cylinder for truck, 8,8'...
Hitting collar, 9,9'...Machine frame, 12.12'
... River pull% fne, 13.13... Pneumatic cylinder for vertically feeding the detector casing 14... Pneumatic cylinder for horizontally feeding the detector casing, 15° 15', 15 ″, 15″’
...Detector housing, 20, 20'...Amount detector housing support frame.

Claims (1)

[Claims] 1. Guide rails 6 are installed on both the left and right sides of the square steel material 2 to be detected, whose surface is held at a constant inclination with the horizontal plane and fed horizontally in its longitudinal direction.
．． Separate carts 5, 5' are provided on which the robots 6' can be moved forward and backward via pneumatic cylinders 7 and 7', and machine frames 9, 9' fixed on these carts are mounted facing the steel material 2 to be inspected. At this position, the detector housing support rod '20.20' is attached via another pneumatic cylinder 14, 14' so that it can move forward and backward in the horizontal direction, and the detector housing support frame 20.20' is attached to the pneumatic cylinder. 13, the detector support frame 20°2
Detector housing 15... is a steel material characterized in that the detector housing 15... is mounted so that the detector 1... contained therein can scan and move parallel to the surface to be detected in a state directly facing the surface. Magnetic flaw detector.