摘要 |
Disclosed is a wire electric discharge machining apparatus comprising a wire-driving system for feeding a wire electrode while opposing it to a workpiece, and a power supply unit for supplying electric power to the wire electrode, wherein electric discharge is effected between the wire electrode and the workpiece to machine the workpiece to have an arbitrary shape. The wire electrode is allowed to approach the workpiece to effect the electric discharge between the wire electrode and the workpiece so that the workpiece is machined to have an arbitrary shape, while a suction mechanism is used to remove undesirable matters including sludge together with a working fluid via cylindrical members from holes formed in the workpiece. Accordingly, it is possible to easily form, by means of wire electric discharge machining, a machining groove having a narrow width and a large depth under a condition deviated from the general standard machining condition for the wire electric discharge machining, for example, even for a workpiece having a large thickness.
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