A kind of magnet vertical press molding method and its molding equipment

Abstract

The invention discloses a magnet vertical press forming method. A mold adopted for pressing is of a mold pressing structure, a magnet blank is formed in the mold pressing structure, and press forming is realized as the pressure is applied to the magnet blank in a magnetic field, wherein the direction of the magnetic field is perpendicular to that of the pressure. According to the magnet vertical press forming method, with adoption of a mode that the direction of the magnetic field is perpendicular to that of the pressure, stress extrusion and magnetic powder magnetization can be mutually adapted in the magnetization pressing process, so that a magnetic field configuration with good magnetization configuration is obtained when a good magnet dense structure is acquired, and the efficiency of magnet processing forming and the quality of a magnet product are improved.

Description

technical field [0001] The invention relates to a magnet compression molding method and equipment using the method, in particular to a magnet vertical 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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