JPH0410654Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a uniform magnetization device for a metal plate that uniformly magnetizes the metal plate.

[Conventional technology]

BACKGROUND ART Permanently magnetizing a single metal plate uniformly in the horizontal direction is an important technique required in various application fields. For example, in a magnetostrictive digitizer, etc., in order to propagate the magnetostrictive pulse uniformly, a rectangular nickel plate, which is the propagation medium for the magnetostrictive pulse, is magnetized uniformly in the diagonal direction of the rectangle and in the horizontal direction of the plate. technology is needed.

[Problem that the invention attempts to solve]

For these reasons, the development of a technique for uniformly magnetizing a metal plate more simply and more strongly is currently underway.

[Means for solving problems]

The present invention was developed in view of these problems, and involves arranging a plurality of strip-shaped permanent magnets with opposite poles facing each other, with the side end faces serving as magnetic pole faces, and the top surface of each permanent magnet being placed in parallel. Magnetic plates are arranged to face each other, and a metal plate to be magnetized is arranged on the upper surface of these magnetic plates, so that the metal plate is uniformly magnetized in the horizontal direction by the magnetic force of the permanent magnet. This is what I did.

[Effect]

Therefore, according to this invention, the metal plate to be magnetized can be uniformly magnetized in the horizontal direction.

〔Example〕

Hereinafter, the apparatus for uniformly magnetizing a metal plate according to the present invention will be described in detail. The figure is a partially cutaway configuration diagram showing an embodiment of this device. In the same figure, 1,
2 and 3 are strongly magnetized strip-shaped permanent magnets,
4 and 5 are acrylic plates as non-magnetic materials, 6,
7 and 8 are magnetic plates made of ferromagnetic material (eg iron). The permanent magnets 1, 2, and 3 have their side end surfaces 1a, 1b, 2a, 2b, and 3a, 3b serving as magnetic pole surfaces, and are arranged side by side at equal intervals with different polar surfaces facing each other, and are made of non-magnetic material. It is placed on a pedestal. That is, the S pole of permanent magnet 1 and the N pole of permanent magnet 2 are arranged to face each other, and the S pole of permanent magnet 2 and the N pole of permanent magnet 3 are arranged to face each other. Strip-shaped magnetic plates 6, 7, and 8 are disposed on the upper surface of each of the permanent magnets 1, 2, and 3 to face each other with an acrylic plate 4 in between. An acrylic plate 5 is arranged.

Next, a method of magnetizing a metal plate using the apparatus configured as described above will be explained. That is, a metal plate to be magnetized, for example, a nickel plate 9, is placed on the acrylic plate 5 of this device. Permanent magnets 1, 2 and 3
The lines of magnetic force emanating from the north pole of the magnet return to the south pole of the same magnet, and are absorbed by the south pole of the adjacent magnet. The lines of magnetic force that are absorbed by the south pole of the adjacent magnet pass through the nickel plate 9, but the lines of magnetic force that are returned to the south pole of the same magnet pass through the magnetic plates 6, 7, and 8 directly above the magnet, so the line of force is absorbed by the nickel plate. It doesn't reach 9. That is, if the direction of the magnetic field lines absorbed by the S pole of an adjacent magnet is in the forward direction, the magnetic field lines returned to the S pole of the same magnet are in the opposite direction. In the section between and 3, forward magnetic field lines pass. If these lines of magnetic force are strong, the nickel plate 9 will be magnetized in the forward direction even in the sections directly above points 1, 2, and 3, and will reach a saturation magnetization state uniformly and horizontally to the plate. .

〔effect〕

As explained above, according to the uniform magnetization device of the present invention, a plurality of strip-shaped permanent magnets whose side end faces serve as magnetic pole faces are arranged side by side with different polarities facing each other, and each of the permanent magnets is Magnetic plates are arranged face-to-face on the upper surface, and a metal plate to be magnetized is arranged on the upper surface of these magnetic plates, so that the metal plate is uniformly magnetized in the horizontal direction by the magnetic force of the permanent magnet. This makes it possible to uniformly magnetize a metal plate in a simple and strong manner. Further, it is also possible to make it possible to have multiple disturbances caused by external disturbances of the magnetic field.

[Brief explanation of the drawing]

The figure is a partially cutaway cross-sectional configuration diagram showing an embodiment of the uniform magnetization device of a metal plate according to the present invention. 1, 2, 3... Permanent magnet, 4, 5... Acrylic plate, 6, 7, 8... Magnetic plate, 9... Nickel plate,
1a, 1b, 2a, 2b, 3a, 3b... side end surfaces.

Claims (1)

[Scope of utility model registration request] It is equipped with a plurality of strip-shaped permanent magnets arranged side by side with their side end surfaces as magnetic pole faces and with different polarities facing each other, and magnetic plates arranged face-to-face on the top surface of each of the permanent magnets, and the top surface of these magnetic plates 1. An apparatus for uniformly magnetizing a metal plate, characterized in that a metal plate to be magnetized is disposed in a portion thereof, and the metal plate is uniformly magnetized in a horizontal direction by the magnetic force of the permanent magnet.