Rotary permanent-magnet suction scheme capable of switching on/off shielding in groove

Abstract

The invention discloses a novel method of permanent magnet equipment. Aiming at the states of heavy weight, high cost, wide magnetic pole and high conversion force for magnetization and demagnetization occurring in application of an existing permanent-magnet material in a lift device, a planar suction plate and a welding positioning technology, a method for achieving magnetization and demagnetization by also using a rotation or translation mode to achieve open-close circulation of a magnetic field without digging holes in an inner magnetic pole and an outer magnetic pole is provided. The permanent-magnet material has the advantages of lower cost, lighter weight, large magnetic field density and smaller conversion force, and can be conveniently fabricated to various large-size or small-size light magnetic equipment.

Description

technical field [0001] The invention belongs to the field of machinery, and in particular relates to a permanent magnetic device, a suction hoist used for conveying steel, a plane suction plate of a machine tool, and a welding clamping device. Background technique [0002] At present, the magnetization or degaussing methods of permanent magnet magnetic equipment with pure mechanical movement can be roughly divided into three categories. One is to use the rotation of the magnetic pole to short-circuit the magnetic field; the other is to move the permanent magnet horizontally so that the horizontal permanent magnet and the vertical permanent magnet are in the same direction or The third is the method of forcibly disconnecting or connecting the magnetic circuit; the products of these three methods have been widely used, and each has its own advantages and disadvantages; for example, the first type has manual and automatic cycle permanent magnet cranes. Rotation method, so it ne...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a kind of magnetization and degaussing conversion resistance for the above-mentioned prior art: heavy self-weight, high cost, wide magnetic poles, too many processes, or incomplete degaussing, or high magnetization and degaussing conversion resistance. Let the permanent magnet move or rotate in a certain way in the pole slot to achieve the working state of magnetization or demagnetization; it has low cost, less process, light weight, demagnetization, high magnetic field density, small conversion force, and convenient operation. It can be made into various large or small permanent magnet magnetic equipment; although the current magnetic attraction has appeared to use the method of rotating in the slot to achieve demagnetization and magnetization, but that is done in the same layer of magnetic poles, and its magnetic poles need Separate it into many segments with a magnetic partition

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