Soft magnetic ferrite magnetic core forming method and forming die thereof

Abstract

The invention discloses a soft magnetic ferrite magnetic core forming method. In the green compact compaction process, the raw materials are filled in a middle die forming groove, the upper punch moves downwards to precompact the powder in the forming groove; the upper punch, middle die and lower second punch move downwards to the respective preset positions so as to compact the back, feet and middle column of the product to the preset dimension and density; in the process of milling the magnetic core, the magnetic core feet are milled to the preset dimension; the middle die and lower second punch can be positioned on a die carrier in an axial sliding mode; the upper side of the middle die is provided with a forming groove, and the lower side is provided with a first lower punched hole and a second lower punched hole which are communicated with the forming groove; the first lower punch is fixed on the die carrier; the upper ends of the first lower punch and second lower punch are inserted in the first lower punched hole and second lower punched hole in an axial sliding mode; and the lower end of the upper punch is inserted in the forming groove in an axial sliding mode. The invention presets middle column air gaps in the green compact compaction process, so that it is not necessary to mill the middle column in the magnetic core milling process, thereby reducing the rejection rate of the product and saving the labor cost.

Description

technical field [0001] The invention relates to a method for forming a magnetic core, in particular to a method for forming a soft ferrite magnetic core and a forming mold thereof. Background technique [0002] In recent years, the trend of equipment components in the fields of computer, video and communication equipment is getting smaller and smaller. At the same time, the requirements for small volume and high precision of the magnetic core are getting higher and higher, especially for the accuracy of the air gap of the magnetic core. Higher, the traditional air-gap magnetic core processing method is to adjust the small air-gap grinding machine, and the operator performs air-gap grinding on the products one by one. Generally, air-gap magnetic cores are commonly used. The preparation process is mostly directly formed by a rotary molding machine. After high-temperature sintering and semi-finished size grinding, a small manual grinder is used to grind the air gap for the part...

AI Technical Summary

Problems solved by technology

The processing and production process of this kind of air-gap magnetic core generally needs to go through green molding, sintering, grinding, and air-gap processing. Larger, the dimensional accuracy of the magnetic core air gap is difficult to control, which affects product performance, and the product yield is low. Inevitably there are problems such as waste of raw materials

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