| 摘要 |
<p>When the wire electrode (W) of a wire cut electric spark machine is broken during tapering by electric spark machining, the wire electrode (W) is smoothly pulled up without being caught in the groove while the work (P) is being processed, by a method wherein the upper wire guide (12) is positioned in the processing condition, a predetermined voltage is applied across the work (P) and the upper wire electrode (W), and the wire electrode (W) only is pulled up, so that the broken end is pulled up out of the work (P). When the work (P) and the wire electrode (W) is no more under the short-circuited condition, the upper wire guide is raised so that the broken end of the wire is detected by a wire detecting means.</p> |
