Patent ID: 6225589
Filing Date: 2001-05-01
Classification: B23H

Abstract:
In an electric discharge machining apparatus for cutting into a workpiece through electroerosion, the combination comprising:a tool housing including an electrode guide, said electrode guide containing a channel and an orifice, said channel defining a curved path leading to said orifice;an electrode, said electrode having a tip end for juxtaposition to a workpiece to establish a spark discharge gap;said electrode being held in said tool housing and extending through said electrode guide, said curved path and out said electrode guide orifice wherein said tip end protrudes through said guide orifice for producing an electroerosive spark to electroerode said workpiece, leaving a reserved portion of said electrode located behind said guide orifice within said tool housing; andelectrode positioning means for incrementally advancing portions of said reserved portion of said electrode along said curved path and through said guide orifice in small increments during electroerosion of said workpiece.