Patent ID: 6537139
Filing Date: 2003-03-25
Classification: B24B,B24D

Abstract:
An apparatus for ELID grinding a large-diameter workpiece to produce a mirror surface finish, comprising:(a) a workpiece driving device that rotates a flat workpiece so as to rotate in horizontal; (b) a first cylindrical conducting grindstone having an outer periphery in contact with a surface of the workpiece; (c) a grindstone rotating device that drives the grindstone to rotate about a first axis thereof; (d) a grindstone reciprocating device that moves the grindstone with a reciprocating motion along the first axis thereof; (e) an axial guiding device that keeps a center line on the first axis of the grindstone at a predetermined angle to a horizontal axis; and (f) an ELID device that electrolytically dresses the outer periphery of the grindstone.