| 摘要 |
PURPOSE:To prevent the breakage of a wire electrode accompanied by the short- circuit phenomenon of a wire electrode by operating an isolated-piece removing means at the time point when the short circuit generated between the wire electrode and a workpiece continues for a predetermined time. CONSTITUTION:In the wire-cut electric discharge machining, a jet nozzle 25 is used as isolated-piece removing means, and isolated minute worked pieces 22 are compulsorily removed by the jet flow 26 (e.g., air, electric-discharge working liquid) jetted-out from the nozzle 25. In other words, when it is detected that short- circuit phenomenon is generated continuously for a prescribed time, the jet stream 26 is jetted-out into a cutting gap 24 from the nozzle 25. Therefore, the minute worked pieces 22 can be easily separated from a workpiece 1. By this method, the breakage of a wire electrode accompanied by the short-circuit phenomenon of the wire electrode can be prevented. |
