NARROW GROOVE MACHINING METHOD BY ELECTRIC DISCHARGE MACHINING

摘要

PURPOSE:To provide a means to perform highly accurate machining of a narrow groove by rotating a disc shaped electrode and a work and making an electric discharge machining and feeding the electrode with a feed rate corrected for the electrode consumption. CONSTITUTION:A cylindrical work 34 is rotatably attached in a machining fluid 9 and is rotated by a motor 27 while a disc shaped electrode 10 is rotatably attached to an electrode atachment base 12 of a machining head 6 and is rotated by a motor 15. The electrode 10 is fed in the direction Z for machining and at the same time a pulse voltage is applied thereto to perform the electric discharge machining. The amount of reduction in the radius of the electrode 10 due to the consumption of the electrode is detected by a non-contact displacement meter 36 and the feeding for the machining in the direction Z is corrected by the signal from said meter 36 thereby enabling highly accurate machining of a narrow groove both in the groom width and the groove depth.