Mold for rectifying deformation of permanent magnetic ferrite product

Abstract

The invention relates to a mold for rectifying deformation of a permanent magnetic ferrite product. The mold for rectifying deformation of the permanent magnetic ferrite product is characterized by comprising an upper puncher pin of the mold, a concave mold and a lower puncher pin of the mold. The upper puncher pin of the mold is made of magnetism conducting materials. The lower puncher pin of the mold is made of magnetism conducting materials and included in the concave mold of the mold, wherein the concave mold is made of materials which do not conduct magnetism. Two types of magnetic fields in time of pressing products are the following two types: one is a parallel uniform orientation magnetic field in the concave mold of the mold and the other is a non-uniform orientation magnetic field outside the concave mold of the mold. Magnetic lines of force of the parallel uniform orientation magnetic field in the concave mold of the mold and the non-uniform orientation magnetic field outside the concave mold of the mold form included angles. The included angles range from 0 degree to 45 degrees from inside to outside. According to the mold for rectifying deformation of the permanent magnetic ferrite product, the problem that deformation occurs when the permanent magnetic ferrite product is machined is fundamentally solved, the rate of finished products and production efficiency are improved and production cost is reduced.

Description

technical field [0001] The invention relates to a mold for correcting deformation of permanent magnet ferrite products. Background technique [0002] At present, domestic permanent magnet ferrite product manufacturers traditionally use forming dies in the prior art with upper punches of magnetically permeable materials embedded in non-magnetically permeable materials to form combined upper punches of the mould; made of magnetically permeable materials The lower punch of the mold and the concave mold made of non-magnetic material are composed. There are two reasons for the deformation of permanent ferrite products after high temperature sintering: one is the orientation magnetic field, and the other is the pressing density of the product. Since the orientation magnetic field of the product is evenly distributed during the pressing process, it has no effect on the deformation of the product; when the product is pressed, the upper punch of the mold moves downward, and when the...

AI Technical Summary

Problems solved by technology

The deformed product cannot be corrected to the normal shape after surface grinding, and the product is scrapped

If the amount of surface grinding of the product is increased, the deformed product can be corrected to the normal shape, but there will be two disadvantages in doing so, one is to reduce production efficiency, which will affect all product production processes; the other is to increase the production cost

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