Patent ID: 8235769

Claim:
An ultra precision elastic emission machining (EEM) method comprising: providing a workpiece with a surface to be machined, the workpiece surface to be machined comprises a mixture of at least two kinds of component materials having different respective EEM machining rates; before performing EEM, irradiating the surface of the workpiece to be machined with an electron beam, whereby the irradiating step modifies the machining rates of the two components of the workpiece surface to be machined such that the machining rates of the components become almost uniform on the surface of the workpiece and surface smoothness is increased during the EEM step; performing EEM by machining the irradiated surface of the workpiece by flowing chemically reactive fine particles along the surface of the workpiece thereby removing machined-face atoms of the workpiece that are chemically bonded to the fine particles along with the fine particles to smoothen the surface of the workpiece.