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    • 40. 发明专利
    • DE10085407T1
    • 2003-08-07
    • DE10085407
    • 2000-11-20
    • MITSUBISHI ELECTRIC CORP
    • GOTO AKIHIRO
    • B23H7/02B23H7/04B23H7/34B23H7/36
    • In wire electric discharge machining in which electric discharge energy is supplied between a wire electrode (1a) and a workpiece (2) by a machining electric power supply means (16) so as to machine the workpiece (2) when the wire electrode (1a) and the workpiece (2) are relatively traveled with each other by a positioning means, there are provided a first process in which rough machining is conducted in a working solution (4a) and a second process in which finish-machining is conducted in gas (7) such as air, oxygen, nitrogen or inert gas, and the positioning means is controlled by a control means (17) so that a relative traveling speed of the wire electrode (1a) with the workpiece (2) in the second process can be set at a constant rate not lower than a predetermined rate at which a short circuit can not continue between the electrodes for a predetermined period of time and more which has been previously set according to a required specification. It is possible to realize a high accuracy and quality of wire electric discharge machining and also it is possible to realize an enhancement of productivity.