| 摘要 |
PURPOSE:To improve machining accuracy by machining a workpiece together with an electric conductive plate set on thinner section of the workpiece to reduce wire amplitude when electric discharge machining is required on the workpiece in which local thickness varies. CONSTITUTION:An indent A-B in the thickness of a workpiece 8, increases amplitude of an electrode 1 at the A-B section although upper and lower wire guides and 6 are placed closer to the workpiece 8. In this case, an electric conductive plate having high machinability such as an aluminium plate 10 is placed on the surface of the workpiece 8 to provide wire machining. The both of the workpiece 8 and plate 10 are machined together to mitigate the wire amplitude at the indent A-B in the workpiece 8; consequently, highly accurate machining is accomplished. |
