磨粒簇有序化砂轮磨削凹坑摩擦减阻表面的策略

结构化表面在减小机械零件摩擦或表面拖曳阻力方面起到重要的作用。为获得一种结构化摩擦减阻表面的高效磨削法，基于砂轮的磨粒有序化排布设计理论，提出一种嵌齿式磨粒簇有序化排布砂轮磨削凹坑摩擦减阻表面的策略。开展磨粒簇有序化砂轮的设计理论研究，分析砂轮磨粒簇排布参数和工件凹坑表面排布参数的关系。探讨实现凹坑排布的磨削参数条件，以及凹坑与磨粒簇几何形状之间的联系。通过磨削试验验证了结构化凹坑表面的磨削形态及磨削创成机制。结果表明：利用嵌齿磨粒簇有序化砂轮能够实现叶序排布、错位排布和阵列排布结构化凹坑摩擦减阻表面的磨削；被磨削结构化凹坑表面的排布形态和凹坑形状取决于砂轮排布设计参数、磨粒簇几何形状参数、磨削参数的选择。

The Strategy of Grinding Dimpled Surface for Reducing Friction Force by Grinding Wheel with Ordered Abrasive Grain Clusters

Structured surfaces play an important role in reducing the friction or dragging force of mechanical parts. In order to obtain an efficient grinding method for structured friction-reducing surfaces，a strategy for grinding the dimpled surface for friction-reducing by the grinding wheel with ordered embedded abrasive grain clusters was proposed based on the design theory of ordered arrangement of abrasive grains in grinding wheel. The arrangement design theory of the abrasive grain clusters on the grinding wheel is studied，and the relationships between the arrangement parameters of the grinding wheel and the dimpled surface of workpiece are analyzed.The grinding parameter conditions to realize the arrangement of the dimples and the relationship between the dimples and the geometry of abrasive grain clusters are discussed.The grinding parameter conditions to realize the arrangement of the dimples are discussed. The design theory of the ordered grinding wheel of abrasive grain clusters is studied，and the relationship between the arrangement parameters of the abrasive grain clusters of grinding wheel and the the dimpled surface of workpiece is analyzed. The grinding morphology and grinding mechanism of structured dimpled surface were verified through grinding experiment. The results show that the ordered grinding wheel with embedded abrasive grain clusters can be used to grind a structured dimpled surface with phyllotactic pattern，staggered pattern and array pattern.The arrangement and shape of the grinding structured dimpled surface depends on the layout design parameters of grinding wheel，the geometric shape parameters of abrasive grain clusters，and the choice of grinding parameters.