| 摘要 |
PURPOSE:To remove chips satisfactorily from a machined part by a method wherein when electrospark machining is performed with shifting operation, a plurality of injection nozzles for processing liquid are operated selectively and successively in connection with the shifting operation. CONSTITUTION:In connection witn the shifting operation performed between a machining electrode 2 and a work 3, electromagnetic valves 12-15 of an allotter 11 are operated selectively and successively. Following this operation, pressed processing liquid is allotted and supplied to a plurality of processing liquid injection nozzles 5-8 equipped around each machining part of the work 3 according to the successive machinings. In such a way, when the processing liquid is injected successively according to the shifting operations, no chip reservoirs appear in a machined hole 3a and roughness of the machined surface is prevented from ununiformity. |
