| 摘要 |
A material is cut along straight lines and curved lines into a tapered configuration with a wire-shaped electrode according to an electric discharge type cutting method or an electrolysis type cutting method. When the straight cutting operation is shifted to the curved cutting operation, the pulse width of a pulsive voltage applied across the work piece to be cut and the wire-shaped electrode is decreased, or the pulse interval thereof is increased, or the open voltage is reduced, to decrease the electric energy applied to the work piece. Accordingly, the width of a groove cut in a portion of the work piece where the radius of curvature is minimum in the curved cutting operation becomes equal to that in the straight cutting operation. An apparatus for practicing the cutting method is also disclosed. |
