| 摘要 |
PURPOSE:To improve electrical discharge machining efficiency, by changing the intervals of the pulses in pulse groups and those between the pulse groups in accordance with the machining area of the machining clearance formed between an electrode and the work to be machined. CONSTITUTION:Pulses are applied on a machining clearance with power supply 3 controlled through the switching of a switch 4. The pulses in pulse groups are generated by an oscillator 5, and unit pulses by an oscillator 6. The intervals of the former and those of said groups are previously fixed in accordance with machining conditions. When machining area is large, machine is stopped for a long time with the intervals of said pulse groups are lengthened so that machining chips can be discharge satisfactorily. Otherwise, machining speed is increased with said intervals shortened. |
