| 摘要 |
PURPOSE:To make it possible to carry out unmanned operation for a long time, by providing a holder for slidably holding a nozzle, a conductor element pressed against a workpiece by a spring in a conductor element attaching board, for power supply, and a pin which supplies power to an electrode in a possible cooling position in the holder. CONSTITUTION:There are provided a holder 3 for holding therein the inserting position of a wire electrode 10 and a nozzle 4 having a working liquid jetting small hole 4a', slidably in the direction of the center of the electrode by means of a spring 6, a conductor element 14 made into contact with a workpiece 17 by a spring 14 in a conductor element attaching board 12 attached to the nozzle 4, for power feed, a passage system 8, 4a, 12a, 15a for supplying and discharging working liquid into and from the above-mentioned components 3, 12. A terminal of a machining gap condenser is connected at one end thereof with a conductor member (not shown) integrally incorporated with the conductor element 14 which is projected from the opposite side of a plate 15, and at the other end is connected to the power supply terminal of a conductor pin 16 so that an electrical discharge circuit is formed. Further, the above-mentioned members 4, 12, 15 are made of synthetic resins such as, for example, Teflon having suitable hardness and rigidity. |
