| 摘要 |
PURPOSE:To stably hold an electrode with no lateral deflection and improve accuracy for machining a fine hole, by providing a groove formed on an external surface of the pipe electrode and supplying machining fluid to be jetted from the pipe. CONSTITUTION:An electrode 1 forms on its external surface over the whole area a doglegged groove 12. The pipe electrode 1, rotated by a motor 7 at a high speed, increases contact resistance with fluid interposing in a gap formed between the electrode and a machined hole 10a in a workpiece 10, and the rotating electrode 1 itself, on which centripetal action acts so as to decrease the resistance, maintains the rotary axis in the center. In this way, a device, preventing lateral deflection, flection vibration, etc. of the thin pipe electrode 1, enhances accuracy of straightness in the machined hole. |
