| 摘要 |
A wire electric discharge machining apparatus according to the present invention includes a plurality of guide rollers 3a through 3f, one electrode wire 2 that is wrapped around each of the plurality of guide rollers 3a through 3f to form a plurality of cut wire portions 2a spaced from one another between a pair of the guide rollers 3a, 3b, a processing power supply 6 that feeds electric power to the individual cut wire portions 2a through a power feed element 7, and a high frequency insulator 4 that has coils 21 which are formed of the electrode wire 2 wound around between adjacent ones of said cut wire portions 2a, respectively, and cores 41 a which close magnetic circuits of the individual coils 21, respectively, and are magnetically insulated from one another. The power feed element 7 is arranged between the individual cut wire portions 2a and the individual coils 21, and the individual cut wire portions 2a are insulated from one another by the individual coils 21 in a high frequency manner. As a result, it becomes possible to independently impress voltages to the individual cut wire portions, so discharges can be generated in a simultaneous and parallel manner. |
