Manufacturing method for composite particle for magnetorheological finishing

Abstract

The invention discloses a manufacturing method for preparing a composite particle from a ferromagnetic particle and an abrasive material for magnetorheological finishing. In particular, the surface ofthe ferromagnetic particle is wrapped with the abrasive material, or the abrasive material is embedded into the surface of the ferromagnetic particle; when the composite particle prepared from the ferromagnetic particle and the abrasive material encounters a magnetic field, the composite particle is arrayed by the action of a magnetic force line to form a self-adaptive flexible solid; and when the magnetic field moves, the composite particle moves with the magnetic field. When the movable self-adaptive flexible solid comprising the composite particle acts on the surface of a workpiece, the abrasive material compounded on the surface of the ferromagnetic particle generates an abrading or finishing effect on the surface of the workpiece. The effect of finishing is correspondingly changed with presence and intensity of the magnetic field. That is to say, the finishing is the magnetorheological finishing. The composite particle comprising the ferromagnetic particle and the abrasive material can perform dry abrading and finishing on the workpiece and be put in carrier liquid (including water-based liquid, a solvent or oil-base liquid and assistants of the water-based liquid, the solvent or the oil-base liquid) for the wet magnetorheological finishing of the workpiece.

Description

technical field [0001] The invention relates to a method for manufacturing composite particles composed of ferromagnetic particles and abrasives for magnetorheological polishing. Specifically, the present invention relates to a method of wrapping or inlaying abrasives on the surface of ferromagnetic particles. When the composite particles composed of ferromagnetic particles and abrasives encounter a magnetic field, they will be arranged under the action of magnetic force lines to form an adaptive flexible solid; When the magnetic field moves, it moves closely with the magnetic field. When this moving, self-adaptive flexible solid composed of composite particles acts on the surface of the workpiece, the abrasive compounded on the surface of the ferromagnetic particles will grind or polish the surface of the workpiece. This polishing effect will change accordingly with the presence or absence and strength of the magnetic field, realizing magnetorheological polishing. The compo...

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Problems solved by technology

[0004] ①Because the abrasive particles are “wrapped” to perform the polishing function, the effect of the abrasive particles on the workpiece is random, the polishing efficiency is low, and the polishing uniformity cannot be guaranteed

[0005] ②During the polishing process, because the abrasive particles and ferromagnetic particles are randomly mixed and distributed in the carrier liquid, the ferromagnetic particles also act on the workpiece at the same time, and even the frequency of acting on the workpiece is much higher than that of the abrasive particles, so that the ferromagnetic particles It is easy to be worn or corroded, and the abrasive and corroded ferromagnetic particles contaminate the polishing fluid and the workpiece, which shortens the service life of the magnetorheological polishing fluid and even affects the polishing effect

[0006] ③Because the abrasive particles are made to work by "coercion", only fine micro-nano abrasive particles can be coerced, and fine micro-nano abrasives can only be used for fine polishing; while the initial surface of the typical surface that requires a higher removal rate Polishing (commonly known as "coarse polishing"), because large particles will sink at the bottom of the polishing liquid, they cannot be entrained to play a polishing role, thus limiting the polishing objects, polishing efficiency, and the types of abrasives used for polishing

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