Abstract
Effects of external hydrostatic pressure on machining property of glasses are reported in this paper. Orthogonal cutting tests of soda-glass and quartz glass were conducted using a specially designed high pressure machining tester. It was found from the experiments that hydrostatic pressure exhibited similar effects on the critical depth of cut both for soda glass and quartz glass. However, its effect on roughness of finished surface in ductile manner machining were different for these glasses. The roughness of soda glass did not depend on hydrostatic pressure, but that of quartz glass became smoother when hydrostatic pressure was applied. Also, hydrostatic pressure affected the specific cutting force of soda glass, whereas it did not affect that of quartz glass.
