| 摘要 |
PURPOSE:To surely perform insertion of a wire electrode of wire-cut electric discharge machining, by press fitting a bush of conductive material to a hole formed in a work and using said bush for a machining start hole. CONSTITUTION:Into a hole drilled in a work 31, a cylindrical bush 32 consisting of iron, brass or the like in height equal to thickness of the work 31 is driven and used for a machining start hole 33. A wire electrode 4 of a wire-cut electric discharge machine passes through said bush 32 and is surely automatically inserted. In this way, scale or the like, even if adhering to the work due to heat transmitment, can be easily removed, thus automatic insertion of the wire electrode can be surely performed even in case of a clearance provided in a reverse side of th work. |
