The diamond wheel with superabrasive is required for mirror-like surface grinding of brittle materials. But the conventional dressing method can not apply to the diamond wheel with superabrasive. Recently electrolytic dressing method was developed for metal bonded diamond wheel with superabrasive and the mirror-like grinding surface of brittle materials could be realized. In this study, the electrolytic dressing system and precision grinding machine for mirror-like grinding surface was constructed and the study on fracture of brittle materials was performed. Grinding experiment to obtain mirror-like surface of brittle materials such as ferrite, sintered carbide and silicon wafer was performed and the characteristics of Elid was studied.
In this study, the following results were obtained The optimal grinding conditions to realize mirror-like surface ground of which the rage is within Ra of 0.05μm and flatness, 0.2μm (RMS value) was developed by using diamond grinding wheel with superabrasive (#4000 - #8000). The surface ground was measured and analyzed by surface roughness tester, SEM and interferometer. The mirror-like surface grinding characteristics of some brittle materials such as ferrite, silicon, ceramics and optical lense and of composites were analyzed by using inprocess electrolytic dressing.
