Preparation device and preparation method of composite particles for electromagnetic rheological polishing

Abstract

The invention relates to the technical field of precision machining, more specifically, the present invention relates to a preparation device and a preparation method of composite particles for electromagnetic rheological polishing. The preparation device comprises an electrostatic spinning assembly, a smashing assembly and a screening assembly used for screening to obtain charged particles, composite particles and uncharged particles. The electrostatic spinning assembly comprises a magnetic particle supply assembly, a polymer supply assembly and a spinning assembly. The polymer contains abrasive particles, and the polymer wraps the periphery of the magnetic particles. The spinning assembly communicates with the magnetic particle supply assembly and the polymer supply assembly, the smashing assembly comprises an electromagnet pressing block, a first driving motor and a grinding disc arranged under the electromagnet pressing block, and the electromagnet pressing block is connected withthe first driving motor. Abrasive particles are changed into a fixed state from a free state, the effective effect of the abrasive particles on a workpiece is guaranteed, the influence of interactionbetween the particles is reduced, the utilization rate of the abrasive particles can be increased, and the uniformity of the polishing effect is guaranteed.

Description

technical field [0001] The invention relates to the technical field of precision machining, and more specifically, relates to a preparation device and a preparation method of composite particles for electromagnetic rheological polishing. Background technique [0002] Electrorheological fluids and magnetorheological fluids are smart materials, which produce rheological effects under the action of external fields, and their viscosity and yield stress will increase sharply, showing mechanical properties similar to solids, and the rheological process of materials is reversible and controllable . Using the rheological properties of electrorheological fluids, magnetorheological fluids and electromagnetic rheological fluids to polish hard and brittle materials has become one of the hotspots in advanced processing technology research. When using the synergistic effect of electromagnetic rheological fluids for polishing, One or several solid phase particles with electromagnetic rheo...

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Problems solved by technology

However, there are many problems in this electromagnetic rheological fluid: (1) In the case of using two kinds of dispersed particles to generate electrorheological effect and magnetorheological effect respectively, because the particles with different properties are separated under different fields, it is easy to The particles subjected to the action of the electric field and the particles subjected to the action of the magnetic field will experience different forces, which leads to the inability of the two types of particles to evenly clamp the abrasive particles, effectively capture and restrain the abrasive particles, and the utilization rate of the abrasive is low, which cannot be guaranteed. Processing uniformity; (2) Abrasive particles are added separately. Since the abrasive is clamped by composite particles, the difference in the quality of the abrasive or the large particles caused by the agglomeration phenomenon will sink below, which really works on the workpiece. It is the finer abrasive and composite particles above, which destroy the structure of the composite particles above, thereby affecting the material removal effect of the workpiece; (3) in the case of using dispersed particles that can produce both electrorheological effects and magnetorheological effects, it will Accelerate the wear of the particle

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