Abstract: The structural parameters of flank faces of cutting-breaking drill tip were defined， and three coordinate systems were constructed and corresponding transformation matrices were analyzed. The parametric mathematical models of drill tip edge and flank face were established. The motion modes of the grinding wheel were described by the coordinate transformation matrixes. By means of the kinematics principle， the wheel-grinding position and pose algorithm of flank face of cutting-breaking drill tip was proposed based on the workpiece coordinate system in CNC grinding processes. The corresponding program was developed in VC++ environment， and a series of grinding processes and tests were carried out to verify the effectiveness of the proposed algorithm. The measurement results show that the proposed algorithm may ensure the structure precision of the flank faces of cutting-breaking drill tip， adjust the poses of the grinding wheel flexibly. 

Key words: cutting-breaking drill tip, flank face, grinding, position and pose

摘要： 定义了断屑钻尖后刀面的结构参数，构建了三个坐标系并分析了对应的转换矩阵；建立了断屑钻尖刃线及后刀面参数化数学模型；采用坐标变换矩阵描述了砂轮的运动方式，借助运动学原理，在数控磨削过程中提出了基于工件坐标系的断屑钻尖后刀面砂轮磨削位姿算法。基于VC++环境，开发了相应的计算程序并进行了一系列的磨削加工和测试来验证所提算法的有效性。测量结果表明：所提算法可保证断屑钻尖后刀面的结构精度，并可灵活调整磨削过程中砂轮姿态。

关键词: 断屑钻尖, 后刀面, 磨削, 位姿