| 摘要 |
PROBLEM TO BE SOLVED: To easily form a groove having a small width and a large depth in a workpiece having a large thickness by wire electric discharge machining. SOLUTION: A wire electrode 130 is drew close to a workpiece W, electric discharge is done between the wire electrode 130 and the workpiece W to machine the workpiece W into a desired shape, and an unnecessary material including sludge is absorbed together with machining liquid 120 by an absorbing mechanism 122 through a cylindrical member from a hole part formed in the workpiece W. Consequently, a machined groove for secondary electric discharge is not enlarged by the unnecessary material including sludge, and the machined groove having a small width and a large depth can be easily formed by wire electric discharge machining in the workpiece W having a condition exceeding general standard machining condition of wire electric discharge machining, for example, a large thickness.
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