The invention provides a synchronous composite
processing method of micro-hole electric sparks and different electrolytic areas and a special tool of the synchronous composite
processing method. The synchronous composite
processing method includes that a tube
electrode is switched to impulse
voltage, and a neutral
salt solution with ultra-low concentration flows into a processing area via the inner side of the tube
electrode at a high speed, and then flows out of the processing area along a gap between the tube
electrode and a workpiece; an end face of the tube electrode is subjected to high-speed punch processing with axial feeding of electric sparks under the ultra-low concentration of the neutral
salt solution, and a hole wall processed by the electric sparks is subjected to radical electrochemical finishing and
machining under the action of low-pressure
voltage. By the synchronous composite processing method, processing precision is guaranteed,
punching efficiency is improved, and processing requirements on various kinds of holes of an aircraft engine are met. Different from conventional
electric spark processing and electrolytic processing, the synchronous composite processing method adopts the neutral
salt solution with the ultra-low concentration, so that processing efficiency in
electrochemical dissolution can be greatly improved and
corrosion degree of equipment can be decreased.