ELECTRIC DISCHARGE MACHINING APPARATUS

摘要

An electric discharge machining apparatus includes: a guide electrode (7) that is shaped like a hollow bar and receives a small-diameter wire electrode (8) for electric discharge machining in such a way that the small-diameter electrode can freely slide and; guide electrode holding means (9, 19, 20) that hold this guide electrode (7) at a specified position; pressurized fluid supply means (10, 11) that supply pressurized fluid into the guide electrode (7) to feed out the small-diameter wire electrode (8) from inside the guide electrode (7) to an electric discharge machining side; and small-diameter wire electrode holding means (21) that automatically hold the small-diameter wire electrode (8) fed out of the guide electrode (7).