ELECTRIC DISCHARGE DEVICE

摘要

PURPOSE:To improve the precision of processing and the working efficiency by a method wherein the depth of a processing hole in a workpiece during processing is measured automatically and processing electrodes are fed into the processing hole section by a depth corresponding to the difference between the desired depth of the hole and the depth of the hole during processing. CONSTITUTION:The processing electrodes 10a and 10D are replaced with a measuring probe 32 before a processing hole 14 in a workpiece 12 reaches the desired depth and the depth of the processing hole 14 under processing is measured. Then the measuring probe 32 is replaced again by the processing electrodes 10a and 10b and the electrodes are fed to the processing hole section to correct the depth of the hole by a depth corresponding to the difference between the desired depth of the processing hole 14 and the depth of the processing hole 14 under processing so that the hole processing work is carried out automatically in one lot to thereby improve the precision of processing and the working efficiency.