Die design method for controlling permanent magnetic ferrite magnetic shoe grinding allowance

Abstract

The invention discloses the technical field of die design of permanent magnetic ferrite magnetic shoe grinding allowance, in particular to a die design method for controlling permanent magnetic ferrite magnetic shoe grinding allowance. The die design method for controlling the grinding allowance of the permanent magnetic ferrite magnetic shoe comprises the following steps: step 1, defining the design requirements of the permanent magnetic ferrite magnetic shoe, and knowing the material and design requirements of the permanent magnetic ferrite magnetic shoe and the use occasion, assembly and appearance requirements of the permanent magnetic ferrite magnetic shoe with high requirements on complex shape and precision through a pattern; 2, estimating a shrinkage constant of a filling part arranged around the edge of the permanent magnetic ferrite magnetic shoe during cooling, and expanding the distance from the inner wall of the outer sealing cavity to the central axis of the die cavity according to the shrinkage constant; and 3, constructing a three-dimensional model according to the given permanent magnetic ferrite magnetic shoe pattern and the technical requirements of the permanentmagnetic ferrite magnetic shoe pattern. According to the method, the structural rationality of the die design of the permanent magnetic ferrite magnetic shoe grinding allowance is improved, the product precision is improved, and the comprehensive effect of reducing the production cost is achieved.

Description

technical field [0001] The invention relates to the technical field of mold design for the grinding allowance of permanent magnet ferrite magnetic tiles, in particular to a mold design method for controlling the grinding allowance of permanent magnet ferrite magnetic tiles. Background technique [0002] The permanent magnet ferrite magnetic tile is arc-shaped and is used in various micro motors to provide a constant magnetic field for the motor. The production process of magnetic tile products is: raw material iron red (Fe 3 o 4 or Fe 2 o 3 ) is wet-grinded by a ball mill into a slurry with a particle size of about 1um; under the action of a magnetic field formed by an energized coil, the slurry is pressed into a green body by a hydraulic press from a shaped mold; the green body is sintered at a high temperature in a kiln to produce various shrinkages. After a series of physical and chemical reactions, the semi-finished product is formed; the semi-finished product is gro...

AI Technical Summary

Problems solved by technology

If the grinding allowance is too large, it will cause waste of raw materials and increase the processing cost of the production process; if the grinding allowance is too small, some parts will not be ground (commonly known as missing grinding), and it will be difficult to ensure the accuracy of the finished product

[0004] The mold design method of the permanent magnet ferrite magnetic tile grinding allowance in the prior art is not reasonable enough, which affects the precision of the finished product of the permanent magnet ferrite magnetic tile. At the same time, the production cost of the permanent magnet ferrite magnetic tile is relatively high, so It is urgent to develop a mold design method to control the grinding allowance of permanent magnet ferrite tiles