METHOD AND MACHINE FOR ELECTRIC DISCHARGE MACHINING

摘要

PROBLEM TO BE SOLVED: To provide an electric discharge machining method and machine by which electric discharge machining is carried out so that high machining accuracy and highly accurate flatness can be achieved. SOLUTION: The electric discharge machine for machining a work piece 14 by continuously removing layers of material comprises a rotary spindle- supporting section 30 for rotate-ably supporting a tubular tool electrode 31, and a numerical control unit CN for controlling three dimensional relative movement of the tool electrode and the work piece 14 in x-y-z directions. A regulation module MR simulates longitudinal wear of the tool electrode and compensation along its trajectory. Electric discharge machining is carried out by transmitting various values of the longitudinal wear, which correspond to a type of geometrical relative positions between the tool electrode and the work piece, that is, the geometrical relative situations such as existence or non-existence of an opening under the tool electrode and existence or non-existence of one or two inner walls at a side of the tool electrode, to the numerical control unit CN.