| 摘要 |
PURPOSE:To perform through hole machining with high efficiency and accuracy by applying a mask, provided with holes corresponding to through holes, to the surface of a workpiece, and jetting solid gas two-phase jet containing fine abrasive grain to the workpiece by a nozzle, thus performing through hole machining to the workpiece. CONSTITUTION:The surface of a workpiece 20 is covered with a mask 29 provided with one or plural holes 3 of approximately square cross section. Solid-gas two-phase jet containing fine abrasive grain is then jetted at high speed by a nozzle 10 from above the mask 29. Approximately square micro through holes are thereby formed at the workpiece 20. |
