Development of a Machining Tester for Two Dimensional Machining Test under External Hydrostatic Pressure

This paper reports on a new machining device developed for experimental study on machining property of hard-brittle materials under external hydrostatic pressure. A new machining device was developed for two dimensional machining tests as well as in situ observation of a machining process by an optical microscope under hydrostatic pressure up to 400MPa. The device consists of four parts; a high pressure vessel, a pump system, a machining device installed in the chamber and an optical microscope. Detail of structure of the device is reported in the paper. Two dimensional machining tests of a soda glass plate were conducted using the device under four levels of pressure. Results of the machining tests is also reported.