| 摘要 |
PURPOSE:To machine a fine hole in tubular body in an accurate manner, by insetting a metal wire in the metal tubular body and filling a ceramic body, while applying electro-discharge machining to the metal wire in the metal tube being plastically machined in advance. CONSTITUTION:A stainless-steel wire 2 of SuS304 is inset in a sheel metal tube 1 composed of stainless steel, while alumina powder 3 is filled up in this tube 1. Then, the tube 1 of an outer diameter ranging from 10mm. to 20mm. or so is reduced to 2mm. or so by means of plastic machining. At this time, a diameter of the metal wire 2 is 0.3mm.. With the electro-discharge machining applied to the metal wire 2 via an electrode (unillustrated herein), high temperature treatment and impact are added to the metal wire, thus a fine hole is machined so accurate a degree. |
