| 摘要 |
PROBLEM TO BE SOLVED: To shorten machining time in an electrical discharge machine including a plurality of electrodes to make a plurality of holes on a workpiece by a single machining operation. SOLUTION: The electrical discharge machine includes a plurality of discharging head units 7a-7f and a plurality of feed lines La-Lf. Each of the plurality of discharging head units 7a-7f includes a driving mechanism for holding one of a plurality of electrodes 8a-8f corresponding to each head unit and changing the position of the corresponding electrode, and also includes a conductive medium member 77 for mediating conduction between a corresponding one of a plurality of discharge power supply units 5a-5f and the corresponding electrode. Each of the plurality of feed lines La-Lf electrically connects the conductive medium member 77 in a corresponding one head unit among the plurality of discharging head units 7a-7f with a discharge power supply unit corresponding to the discharging head unit, and lengths of the plurality of feed lines La-Lf are the same as one another. COPYRIGHT: (C)2011,JPO&INPIT
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