为表征刀具刃口结构，提出了一种刃口精密测量和数据处理方法． 采用激光扫描共焦显微镜对刀具刃口进行精密测量，通过数据后处理拟合刃口圆弧半径． 研究结果表明: 测量采用的角度块倾角会对刃口测量范围及刃口不对称度判定产生影响，应根据刀具结构参数合理选择，对于TPMT16T304 刀具选择倾角为50． 5°的角度块时测量效果较好;数据平滑可以有效去除测量噪声，提高数据处理效率和测量精度; 刀具刃口最小二乘拟合结果与扫描电镜法测量值及标称值较吻合，标准不确定度优于0． 084 μm． 以上结果说明，基于激光扫描共焦显微技术的刀具刃口测量方法简便、测量精度高且不破坏刀具．

In order to represent cutting edge,a method for precision measurement and data processing is proposed,In the method,the laser scanning confocal microscope ( LSCM) is employed to measure the cutting edge in a preciseway,and then the cutting edge radius is fit through data post-processing.The results show that ( 1) the bankangle of angular gage block can affect the range of measurement and the judgment of asymmetry,which should bereasonably chosen according to the structural parameters of cutting tool; ( 2) as for TPMT16T304,the measurementeffect is better at the bank angle of 50.5°; ( 3) data smoothing can effectively remove the measurement noise,andthus improve processing efficiency and measurement accuracy; and ( 4) the least square fitting result is consistentwith the measurement value obtained by means of SEM and the nominal value,and the uncertainty of criterion issuperior to 0.084 μm.The results mentioned above indicate that the proposed method is easy to operate and moreprecise in measurement.Furthermore,it does not damage cutting tools.