The invention discloses a disc type scanning
electrode mask film microelectrolysis
electrical discharge machining system. The
system comprises a workpiece, a disc type
electrode and
working fluid, the
machining surface of the workpiece is covered with a
mask film,
machining windows are formed in the
mask film, the workpiece is placed in the
working fluid, the disc type
electrode is located in the part, above the workpiece, of the
working fluid, and the workpiece and the disc type electrode are connected with a power source through wires. The
machining system and machining method have the advantages that the workpiece is covered with the structurally-insulating mask film, the mask film shape can be precisely copied, the large-scale textured
microstructure machining is conducted, the machining is only conducted in areas which are uncovered by the mask film, and the high locality is achieved; the tool electrode which is used is a large-area electrode, and relative movement exists between the tool electrode and the workpiece; losses of all areas of the tool electrode can be made to tend to be balanced by planning a special movement curve, and all machining gaps are made to maintain unified; the
electrolysis only serves for the
polishing effect, and the main removal form is
spark discharge removal; the working fluid is supplied in a mode from top to bottom and sprayed out of the center of the disc type electrode from inside to outside, so that the working fluid renewal is made to be more effective.