Development of New Scaife Machine for Making the High Precision Diamond Cutting Tools

Abstract

We have developed a new scaife polishing machine for the purpose of polishing the high precision diamond cutting tools. As a high precision cutting tool, the high sharpness and flawless cutting edge are required. By using this polishing machine, the sharpness of a diamond tool at the cutting edge can be controlled within the range of 20nm. This machine is equipped with a submicron-scale mirror finished hardened-steel polishing Scaife, a supporting table can reduce the face deflection to less than 1μm, and a plastic diamond tool holder for protecting the edge of the diamond tool from the unexpected shock, which is supported by three points consisting of the edge of diamond tip and two control screws, this structure can help to adjust the work surface to any angles by only adjusting the two control screws. To facilitate the advanced angle operations, the algorithm was created to calculate the overhang length variations of the two control screws for controlling the changes of roll- and pitch-angle of the diamond tools.