Travelling wire and cavity sinking EDM apparatus

摘要

An EDM apparatus having a first support member for the workpiece and a second support member for the guide members of an electrode wire. A cross- slide provides relative linear motions between the two support members for effecting a cut in the workpiece by the electrode wire. A third support member carrying a form electrode tool is arranged to be selectively held stationary either relative to the first support member, by an appropriate first coupling member, or relative to the second support member, by a second coupling member. Under the first condition, the cross-slide provides the necessary relative linear displacements between the electrode wire and the form electrode tool for cutting the electrode tool by the electrode wire and, under the second condition, the same cross-slide provides the necessary displacements for sinking the electrode tool into the workpiece.