磁流变效应, 微砂轮, 磨粒, 半固着

For the technology of MR effect-based tiny-grinding wheel, the mechanism of the semi-bond state of abrtasive constrained effectively by magnetic chain under the magnetorheological effect was analyzed theoretically.Then, a model of constrained abrasive particle by magnetic chain was established.And the influences of characteristics of abrasive, such as material, size, shape and volume fraction of abrasive in magnetorheological fluid on the semi-bond state of abrasive and the properties of the MR effect-based tiny- grinding wheel were studied. According to a micro-groove machining experiment with the MR effect-based tiny-grinding wheel, the material removal rates with different abrasives were analyzed. And the experimental results coincide with the theoretical analysis, which shows the feasibility of semi-bond theory of abrasive for MR effect-based tiny-grinding wheel.