| 摘要 |
PURPOSE:To make more than two types of wire electrodes different in each diameter automatically insertable, by making a wire electrode of more than the specified limit in diameter so as to be guided by a tubular electrode guide and another electrode of less than the specified limit to be inserted by another introducing and inserting device, respectively. CONSTITUTION:In the automatic wire insertion of a wire electrode 7 of more than about 0.1mm in diameter, a motor 18 is driven, a feed screw 17 is rotated and an electrode feed head 15 is made to go down, while a capstan 12 is rotated, feeding the electrode 7 downward, and when a tubular electrode guide 20 and a tip of the electrode 7 are approached to a work body 42, discharge takes place between both, thus machining is carried out. Next, in finishing operation using a wire electrode 33 of less than about 0.1mm in diameter, a lower end of the electrode 7 subjected to roughing is cut by a cutter 30 and then the capstan 12 and an electrode feed drum 5 are rotated in reverse, pulling the work body 42 out of a machining hole, then it is reset. Then, a tip of the electrode 33 held between rollers 34 and 35 is received by a drawer arm 41, stretching it in the orthogonal direction with the electrode 7. And, the head 15 is made to go down, and the electrode 33 is inserted into the machining hole of the work body 42 with a guide rod 40.
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