Precision of rake face of mechanically lapped single crystal diamond tool

In order to improve the precision of diamond tool, the model of mechanical lapping diamond rake surface is analyzed, and experiments are implemented to study the influence of scaife pre-lapping quality and lapping crystal direction on the rake surface precision of diamond tool. After fully pre-lapping the scaife, the roughnessR_aof the diamond tool rake surface decreases from 1.308 nm to 0.920 nm. In the fine lapping of (110) crystal surface, the surface roughness of <100> crystal orientation after lapping is 0.540 nm and the surface roughness along <110> crystal orientation is 0.430 nm, realizing the precision lapping of diamond tools.