聚晶金刚石微细球头铣刀刃磨工艺参数优化

针对直径为0.5 mm的聚晶金刚石(PCD)微细球头铣刀刃磨质量控制问题，基于六轴数控刀具磨床几何运动原理，建立PCD微细球头铣刀的砂轮刃磨运动数学模型，开展PCD刀具精密刃磨正交试验，研究刃磨工艺参数对主轴负载率、刀具前刀面表面粗糙度、刀具刃口钝圆半径的影响规律。结果表明:磨削速度对主轴负载率以及刀具前刀面表面粗糙度的影响最为显著，提高磨削速度有利于获得较好的刀面质量；磨削深度对刃口钝圆半径的影响最为显著，减小磨削深度有利于获得锋利的刃口形状。通过合理选择刃磨工艺，PCD微细铣刀直径误差小于4.0 μm，刀具钝圆半径为4.5 μm，刀具角度误差小于1°，无明显刃磨损伤缺陷。 

Optimization of edge-grinding parameters of polycrystalline diamond micro ball-end mill

Aiming at grinding quality control problem of the 0.5 mm diameter polycrystalline diamond micro ball-end mill, based on the geometric motion principle of six-axis CNC machine, a mathematical model for the grinding of PCD micro ball-end mill is established, orthogonal experiments are carried out to study the influence of the grinding parameters on the spindle load, the surface roughness of tool rake face, and the radius of micro ball-end mill cutting edge. The results show that the grinding speed has the most significant effect on the surface roughness and spindle load, and the grinding depth has the most significant effect on the radius of the cutting edge. With the optimized process parameters, the diameter error of PCD micro ball-end mill is less than 4.0 μm, the radius of tool blunt circle is 4.5 μm, the angle error of tool is less than 1°. The edge quality is complete without obvious grinding damage defects.