Powder feeding and mixing device for preparing magnetic grinding material through atomization and rapid solidification and powder feeding and mixing method

Abstract

The invention provides a powder feeding and mixing device for preparing a magnetic grinding material through atomization and rapid solidification and a powder feeding and mixing method. The powder feeding and mixing device comprises a powder feeding device and a powder mixing device. The powder feeding and mixing control method comprises the following steps in the specification, wherein the steps1 and 2 are combined to achieve the purposes of (1) regulating a material control valve to a maximum opening degree, and (2) regulating the opening degree of a balancing valve and simultaneously observing a pressure displayed by a balance barometer, wherein the pressure of the balance barometer is regulated to be 0.05-0.5MPa; the steps 1, 2 and 3 are combined to realize regulation of blowing pressure; the steps 1 and 6 are combined to realize regulation of controlling and debugging pressure of jet flows of a flow mixing pipe; the steps 1, 2, 3, 6 and 7 are combined to realize the flow regulation of hard grinding materials; and the steps 6, 7 and 8 are combined to realize the regulation of control pressure for the jet flows of the flow mixing pipe. Under the action of the powder feeding and mixing pipe, the hard grinding materials in the flow mixing pipe are fully mixed with high-pressure gas so as to form a gas-solid two phase flow. According to the invention, an important condition is provided for a novel method for preparing the magnetic grinding material.

Description

technical field [0001] The invention provides a powder feeding and mixing device for preparing gas-atomized fast-setting magnetic abrasives and a powder feeding and mixing control method, belonging to the technical field of magnetic particle grinding preparation. Background technique [0002] Magnetic particle grinding and finishing technology is a new finishing process developed by applying magnetic field to traditional grinding technology; it is an excellent finishing method; it is an effective technical means to improve the surface quality of products. This method has many technical advantages: flexibility, self-adaptability, self-sharpening, controllability, small temperature rise, no need for tool wear compensation, no need for shape modification, etc. Complicated requirements, it can realize the grinding and finishing of three-dimensional complex curved surfaces and solve automation problems; and it can reduce the manufacturing cost of parts, which has caused extensive...

AI Technical Summary

Problems solved by technology

The current problem of the reaction casting method is that the content of ceramic hard abrasive in the magnetic abrasive is low and the particle size of the hard abrasive is difficult to control

Although this method solves the problem of poor compatibility between the iron-based phase and the abrasive phase, the magnetic abrasive prepared by this method is subjected to the high temperature of the plasma flame, and the sharp cutting edge of the abrasive grain phase is passivated, resulting in a significant reduction in grinding efficiency. , its grinding ability is even inferior to that of magnetic abrasives prepared by other simple methods

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