FIELD: process engineering.
SUBSTANCE: invention relates spark-erosion processing and can be used for spark-erosion piercing of small-diameter of a wide range of parts, for example, fuel nozzles. In compliance with this invention, ultrasound oscillations are applied to electrode in coordination with operating voltage pulse feed. Note here that operating voltage pulse feed is timed with the phase of approach of electrodes according to the relationship φ=2πƒt+kπ, where ƒ is ultrasound oscillation feed frequency, t is time, s, l<k<1.5. Note here that said electric pulse feed frequency ƒe is varied discretely as electrode penetrates into workpiece. Note also that said frequency of ultrasound oscillations makes 18-88 kHz while amplitude equals 5-30 mcm.
EFFECT: stable process, higher surface quality.
3 dwg
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