| 摘要 |
PURPOSE:To finish a three-dimensional formed workpiece surface of a hard-cut metal in a short time and in a highly accurate manner and secure a mirror-finish glossy surface by feeding fresh dielectric fluid to space between a workpiece and an electrode afterremoval of an electrolytic product, and feeding a pulse current after the elapse of the specified time. CONSTITUTION:An electrode 4 is attached to the lower end of a rod 17 of an electrode clamping device 5, making it go down, and an electrode surface 4a is opposed to a workpiece surface 2a, while the electrode 4 and a workpiece 2 are dipped in dielectric fluid 2, and this workpiece is machine. And, after raw material is eluted, an electrolytic product is discharged together with the dielectric fluid 41 by operation of a solenoid valve 42 or the like. Next, the fresh dielectric fluid 41 is filled up, setting the electrode 4 to the specified position, and a pulse current is fed to it after the elapse of 1-5sec, thus the next machining takes place. This series of processes is repeated by a signal of a controller 12. With this constitution, there is no generation of a stripped pattern due to flow velocity unevenness, thus such a three-dimensional metal curved surface that shows a mirror-finished gloss of highly accurate and fine surface roughness is securable in a short time.
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