FIELD: technological processes.
SUBSTANCE: invention relates to electric erosion machining of holes by hollow electrode-tool. Device comprises a switching unit with electromagnetic valves, an electronic computer, inter-electrode gap sensors, a low-pressure hydraulic line of the lubricating-cooling process facility and a pneumatic manifold. Switching unit comprises in-series connected to pneumatic main line throttle, electromagnetic valve, switching air supply to internal cavity of part, and check valve, and connected to low-pressure hydraulic line of lubricating-cooling process facility electromagnetic valve, switching supply of lubricant-cooling process facility into part inner cavity, and in-series connected to it check valve.
EFFECT: enabling the electric erosion machining process stability.
1 cl, 1 dwg
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