Magnet parallel pressing forming method and forming equipment thereof

Abstract

The invention discloses a magnet parallel pressing forming method. A mold for pressing has a die pressing structure; a magnetic block is formed in the die pressing structure, and is suffered from pressure in a magnetic field to realize pressing formation; and the direction of the magnetic field is parallel to the direction of the pressure. The magnet parallel pressing forming method can enable the stress extrusion to adapt to magnetization of magnetic powder in the magnetic pressing process through a mode of parallel the magnetic direction of the magnetic field to the direction of the pressure, so that the excellent magnet compact structure is obtained, the magnetic field configuration with excellent magnetization form is obtained, the magnet machining forming efficiency is improved, and the magnet product quality is promoted.

Description

technical field [0001] The invention relates to a magnet compression molding method and equipment using the method, in particular to a magnet parallel compression molding method and molding equipment. Background technique [0002] From the perspective of the development history of permanent magnet materials, the carbon steel used at the end of the 19th century had a magnetic energy product (BH)max (a physical quantity that measures the magnetic energy density of a permanent magnet) less than 1MGOe (mega-high), while the mass-produced Nd-Fe abroad -B permanent magnet material, the magnetic energy product has reached more than 50MGOe. Over the past century, the remanence Br of the material has increased very little, and the increase in energy product is due to the increase in coercive force Hc. The improvement of coercivity is mainly due to the understanding of its nature and the discovery of high magnetocrystalline anisotropy compounds, as well as the progress of preparation...

AI Technical Summary

Problems solved by technology

These are the main permanent magnet materials on the market, and some are eliminated due to the original production process or cost, which cannot be widely used, such as Cu-Ni-Fe (copper-nickel-iron), Fe-Co-Mo (iron-cobalt-molybdenum) , Fe-Co-V (iron cobalt vanadium), MnBi (manganese bismuth)

[0009] The production of small permanent magnets, in the prior art, is formed by cutting large magnets after they are formed. After cutting, not only need to cut and trim again, but also need to consider the cutting loss in the form of cutting In addition, the quality of the same batch of magnets is unstable due to the uneven distribution of molding materials after the large block structure is cut into small pieces.

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