JPS6237169Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of a magnetic particle flaw detection device, and in particular to its magnetization table.When dispersing fluorescent magnetic powder liquid onto the surface of a rectangular steel piece, it is picked up from a conveyor and supported on a magnetization table. , Concerning the simplification and smooth operation of the mechanism for returning to the conveyor.

Before rolling a steel billet, it is necessary to remove the flaws, and magnetic particle flaw detection is generally performed. That is,
When a magnetic powder liquid made by dispersing and mixing iron powder carrying a fluorescent substance in water is sprinkled on the surface of a square steel piece that has been magnetized by electricity, the magnetic powder will adhere to areas where there are scratches and where the magnetic field changes suddenly. If the liquid is dried to fix the magnetic particles and exposed to ultraviolet light, the defective areas will emit fluorescence, making their presence known.

The magnetic powder liquid must be evenly distributed over the entire surface of the square piece, and when applying the magnetic powder liquid by spreading, the cross section of the square piece must be horizontal to ensure that the liquid is distributed over the entire surface. It is necessary to support it so that it looks like a diamond shape rather than a square when viewed from the direction, that is, so that each edge angle faces up, down, left and right.

Conventionally, the mechanism for supporting square steel pieces during magnetization was
It was a complex and large-scale project. For example, a torii-shaped beam with four V-shaped notches on the upper edge of the horizontal part is moved up and down by a rack and pinion, and a cross-feeding conveyor is combined with this to create a walking mechanism, and a lever-type jumping device is used to lift a square piece of steel. There is a method in which square steel pieces are supplied for magnetization by a link mechanism using a hydraulic device from a transport conveyor, but in both of these methods, the majority of the mechanism is under spraying of magnetic powder liquid, and the main part of the mechanism is placed in a magnetic particle collection tank. Since the liquid is placed inside the magnetic powder, the liquid adheres to various parts of the mechanism, making it difficult to recover, and the concentration of the magnetic powder liquid changes, which is undesirable. There are also difficulties in maintaining the equipment.

Therefore, attempts have been made to place the mechanism outside the tank. For example, a hydraulic link device installed outside the tank moves the mount up and down, and a magnetization stand that moves horizontally on the mount is installed, and this is overhanged above the tank. be. In this case, square steel pieces weighing several tons are supported in a cantilevered manner, so the structure must be robust.

The inventor of the present invention did not insist on placing the square steel piece support mechanism outside the tank, but instead thought of making it easier to support by placing it inside the tank, and when designing the mechanism, he considered the preferred movement of the square steel piece before and after magnetization. By pursuing
We succeeded in solving the above problems with a simple configuration of a star-shaped rotating magnetization table.

As shown in FIGS. 1 and 2, the magnetic particle flaw detection device of the present invention includes a conveyor 2 that conveys a square steel piece 8,
A magnetization table 5 that supports the conveyed square steel piece 8 so that each edge angle faces up, down, left and right, an energizing device 1 that magnetizes the square steel piece 8, a magnetic powder liquid dispersion device 3 that applies magnetic powder liquid to the magnetized square steel piece 8, and a magnetic powder liquid collection tank 4, a magnetization table 5 is formed by attaching at least two star-shaped plates 51 made of an insulator to a rotating shaft 52,
It is characterized in that the square steel piece 8 on the conveyor 2 is scooped up and supported by rotating the rotating shaft 52 intermittently, and then lowered onto the conveyor 2 again.

As shown in FIGS. 1 and 2, the current supply device 1 includes a fixed frame 11 horizontally suspended above a rotating star-shaped magnetization table 5, a rail 17 attached to the fixed frame 11,
18, a magnetized cart 12 running on these rails 17 and 18, an arm 13 extending horizontally from the magnetized cart 12;
and a magnetizing head 14 provided at the tip thereof.

The conveyor 2 is a cross-feeding chain conveyor that moves intermittently and is installed perpendicular to the rotating shaft 52 of the star-shaped rotating magnetization table 5.

The magnetic powder liquid dispersing device 3 includes a fixed frame 11 or its extension surface with a number of spray nozzles 31, 31, . It consists of

The magnetic powder liquid collection tank 4 is a water receiving tank for receiving the falling magnetic powder liquid, and accommodates a rotating star-shaped magnetization table 5 and covers the conveyor 2 .

The star-shaped rotating magnetization table 5 is shown in FIGS. 1 and 2.
As shown in the figure, a plurality of star-shaped plates 51, 51, . The rotating shaft 52 is intermittently rotated by a drive motor 54 outside the tank via a transmission mechanism 55, and the star-shaped plates 51, 5
1, . . . 51 are driven intermittently by 1/8 rotation.

As shown in FIG. 3, the star-shaped plate 51 typically has V-shaped notches 511, 51 divided into eight equal parts.
2,...517,518. Notch portion 51
The opening angle θ of 1,513,515,518 is 95~
A range of 100° is a preferred angle for the operation of scooping up and lowering the square steel piece 8.

The drying conveyor 6 is a continuously running horizontal conveyor, and sends the square steel piece 8 to the ultraviolet ray irradiation flaw detection device 7 after the drying process.

The operation of the magnetic particle flaw detection device of the present invention will be explained as follows.

A square steel piece 8 is intermittently fed to the left end position 8A of the conveyor 2 shown in FIG. 1 by a chain feeder (not shown), and then conveyed to the position 8B. At this position, the length of the square steel piece 8 is automatically measured and further conveyed to the position 8C.

The star-shaped plate 51 of the star-shaped rotating magnetization table 5 rotates intermittently by 1/8 rotation. Notch 518 shown in FIG.
As shown in FIG. 1, the square steel piece 8C is scooped up and supported at the position of the square steel piece 8D so that each edge angle faces up, down, left and right. At this point, the square steel piece 8D is kept insulated from the conveyor.

The magnetizing cart 12 operates according to the length of the square steel piece 8D, and current is applied from the magnetization head 14 to both ends of the square steel piece 8D to magnetize it.

Magnetic powder liquid is sprayed onto the magnetized square steel piece 8D from the spray nozzles 31, 31, . . . 31, and spread over the entire surface. The magnetic powder liquid flowing down is collected by the magnetic powder liquid collection tank 4, and the concentration is adjusted as necessary and returned to the magnetic particle liquid tank 32.

The square steel piece 8D is lowered onto the conveyor 2 by the next 1/8 rotation of the star plate 51, and transferred to the drying conveyor 6 at a position 8E.

With the above configuration, the magnetic particle flaw detection device of the present invention has the following features:
The operation is smooth and the amount of movement is small, and as a result, the generation of shock and noise is reduced compared to conventional models. In addition, since the mechanism is simple, it is easy to protect the moving parts and it is convenient for maintenance, and the concentration of magnetic powder liquid changes less and the recovery rate is improved.

[Brief explanation of the drawing]

Figures 1 and 2 are diagrams showing typical examples of electromagnetic flaw detection equipment to which the present invention is applied. It is a front view showing a collection tank in section. (However, the magnetic powder liquid tank is omitted.) FIG. 3 is a detailed view of a typical example of a star-shaped plate used in the apparatus of the present invention. 1... Current supply device, 2... Conveyor, 3... Magnetic powder liquid dispersion device, 4... Magnetic powder liquid collection tank, 5... Magnetization stand, 51... Star-shaped plate, 52... Rotating shaft, 6... Drying Conveyor, 8 (8A, B, C, D and E)...
...Square steel piece.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Conveyor 2 that conveys the square steel billet 8, magnetization table 5 that supports the conveyed square steel billet 8 so that each edge angle faces up, down, left and right during magnetization, and magnetizes the square steel billet 8. In a magnetic particle flaw detection device consisting of an energizing device 1, a magnetic particle spraying device 3 for applying magnetic powder liquid to a magnetized rectangular steel piece 8, and a magnetic particle liquid collection tank 4, a magnetizing table 5
is formed by attaching at least two star-shaped plates 51 made of insulators to a rotating shaft 52, and by intermittently rotating the rotating shaft 52, the square steel pieces 8 on the conveyor 2 are scooped up and supported, and then again. A magnetic particle flaw detection device characterized in that it is configured to be lowered onto a conveyor 2. (2) The star-shaped plate 51 has four notches 511, 513, 515, 517 for receiving the square steel pieces 8 at equal intervals around the circumference.
The magnetic particle flaw detection device according to claim 1, wherein the rotating shaft 52 rotates intermittently at 1/8 revolutions. (3) The star-shaped plate 51 has four notches 511, 513, 515, 517 for receiving the square steel pieces 8 at equal intervals around the circumference.
The magnetic particle flaw detection device according to claim 1, which is a utility model registration, wherein the intermittent rotation of the rotating shaft 52 is 1/8 rotation at a time. (4) The magnetic particle flaw detection device according to claim 2, wherein the opening angle θ of the notches 511, 513, 515, and 517 is in the range of 95 to 100 degrees.