叶序排布砂轮磨削微结构化表面的仿真研究

Simulation Study on Grinding Microstructured Surface by the Grinding Wheels with Abrasive Phyllotactic Pattern

结构化表面在减小零件摩擦和表面拖曳阻力、改善零件的耐磨性方面均起到了一定的作用,能够有效地改善零件的机械性能。文章从仿生学中的叶序排布理论出发,设计了磨粒叶序排布超硬材料砂轮。利用不同形状磨粒叶序排布砂轮对平面形成结构化表面进行磨削,建立了砂轮磨削的运动轨迹方程,并应用MATLAB软件对磨削过程进行运动学仿真。仿真结果表明:不同形状磨粒的砂轮均可以实现凹坑、沟槽、凸台等结构化表面,且通过恰当的选择磨削用量和砂轮磨料的排布参数,可以获得不同形态的结构化表面。

The structured surface plays a certain role in reducing friction and surface drag resistance of parts and improving the wear resistance of parts, it can effectively improve the mechanical properties of parts. A superhard grinding wheel with abrasive phyllotactic pattern is designed based on the biological theory, and the structured surface was ground by using different shapes of the superabrasive wheels with abrasive phyllotactic pattern. By established the equation of motion path of grinding, the kinematics simulation of grinding process was carried out by using MATLAB software. The simulation results show that, the grinding wheels with different shapes of abrasive grains can realize the structured surface such as dimple, grooves and convex hulls, and the different shapes of structured surfaces can be obtained by appropriate selection of the grinding parameters and the arrangement parameters of the abrasive wheel.