| 摘要 |
PURPOSE:To enable a machine to perform high efficient electrification with a less heat loss, by providing a plurality of electrifying pins while dividing a discharge current to flow from a machining power supply and performing the electrification so as to increase an electrifying contact area. CONSTITUTION:A wire cut electric discharge machine, providing a plurality of electrifying pins, arranges all the nearest electrifying pins to a work 2 to be opposed interposing a wire electrode 1 therebetween, and each electrifying pin, grouping the pins 31 and 32, 41 and 42, 33 and 43 and 34 and 44 to be paired as a set, is connected with a power supply. A pulse is discharged by turning switches 61, 62, 63 on and off simultaneously or by a phase difference control, and the machine, supplying from the power supply 7 a DC current in a pulse state through each electrifying pin from flow divider circuits 51, 52, 53, repeats a pulse discharge. The machine, adjusting the matching of a current flowing in each flow divider circuit 51, 52, 53 so that the divided current is allowed to equally flow in accordance with each distance of the electrifying pin from its discharging pat, prevents a flow of the current from concentrating to the electrifying pin in one part. |
