关键词: 电流变效应, 硬脆材料, 抛光, 即效微型砂轮, 耐磨性

Abstract:

Experiments were conducted to reveal the effects of electrode materials with different wear resistance,such as chilled steel electrode, stainless steel electrode, brass electrode and graphite electrode,and ER fluids with different components on the material removal efficiency of common glass. The processing mechanism was also studied. Experimental results indicate that higher efficiency of material removal can be achieved using chilled steel electrode tools and stainless steel electrode tools, thus, the material removal efficiency will enlarge with the increase of the wear resistance of the cone-electrode tool.Furthermore,a greater material removal efficiency can be obtained using the zeolite particle-ER fluid than that using the SiO₂ particles-ER fluid.The reasons are that the wear resistance of cone-electrode material dominates the stability of the working gap between the needle-like tool and workpiece,and that different ER fluids can obviously influence the strength of ER effects,which determines the polishing pressure on the workpiece surface and directly influences the polishing performance of the tiny-grinding wheel.

Key words: electrorheological(ER) effect, rigid-fragile material, polishing, instantaeous tiny-grinding wheel, wear resistance