随机网格结构固结磨料磨盘平面磨削性能研究

针对超精密磨削加工过程对工件材料去除效率、表面质量、亚表面损伤等指标的复合需求，提出一种基于泰勒多边形设计的随机网格结构固结磨料磨盘（textured-fixed abrasive plate, T-FAP），并以光固化树脂作为结合剂基体材料混合微米级氧化铝磨料制备磨盘，使用MATLAB图像分析和磨抛轨迹仿真方法研究磨盘磨削过程中表面磨损时变图案特征对其加工性能的影响，并通过铝制工件的平面磨削实验对磨盘磨削过程中的材料去除率及工件表面粗糙度进行分析。实验结果表明：相比传统固结磨料磨盘，采用随机网格结构磨盘加工的工件表面粗糙度为0.84μm，材料去除率为3.21μm/min，能够在保证材料去除率的同时获得较高的表面精度。

Study on machining performance of fixed-abrasive lap-grinding plate with random grid structure

To meet the increasing requirements on material removal efficiency, surface quality, and subsurface damage in the ultra-precision grinding process, a textured-fixed abrasive plate (T-FAP) with random grid structure based on the Voronoi Diagram is proposed. The abrasive tool is fabricated by using UV-curable resin and micro-level alumina abrasive grains. The influence of time-varying texture characteristics of surface wear on the machining performance is studied via MATLAB image analysis and numerical simulation of the grinding trajectory. The lap-grinding experiment of the aluminum workpieces is carried out to analyze the material removal efficiency and workpiece surface roughness obtained from the T-FAP grinding process. The results show that the surface roughness of the workpiece processed with the T-FAP grinding is 0.84 μm, and that the material removal rate is 3.21 μm/min. Compared with the traditional fixed abrasive grinding tool, the T-FAP grinding ensures the material removal efficiency and obtains high surface accuracy as well.