SHEET BLANK ELECTROCHEMICAL TREATMENT METHOD AND APPARATUS FOR PERFORMING THE SAME Russian patent published in 2006 - IPC B23H3/02 B23H11/00 

FIELD: machine engineering, possibly forming through openings of any configuration in thin sheet electrically conducting materials.

SUBSTANCE: method for electrochemical treatment of sheet blank in flow-through electrolyte by means of tool-electrode mounted with gap relative to blank when blank being anode and tool-electrode being cathode performing oscillations in direction to blank comprises steps of measuring minimum and maximum working pressure of electrolyte fed through tool-electrode before turning on working voltage applied between tool-electrode and blank on which dielectric stencil is applied; during electrochemical treatment tracing changes of electrolyte pressure in duct for feeding it relative to said minimum and maximum pressure values of electrolyte. When maximum pressure of electrolyte exceeds predetermined setting value working voltage is turned off while electrolyte feed is going on. Pressure is set according to its working value in inter-electrode gap due to cleaning gap. When electrolyte pressure achieves its working value electrochemical treatment process is going on after turning on voltage again. Treatment process is terminated when minimum pressure of electrolyte lowers till value preset for minimum pressure of electrolyte. Apparatus for performing the method includes tool-electrode mounted with gap relative to blank; vibration exciter, pressure pickup, working voltage source, dielectric stencil placed on blank, pressure signal converter, memory unit, setting values setter, comparator. First inlet of comparator is connected to setter of setting values, its second and third inlets are connected to first outlet of converter and outlet of memory unit whose inlet is connected to second outlet of converter connected to pressure pickup mounted in electrolyte feed duct of tool - electrode. Outlet of comparator is connected through unit for turning off working voltage with working voltage source.

EFFECT: enhanced quality of electrochemical treatment due to interrupting process of anode dissolving at accumulating in inter-electrode gap products of electrochemical treatment and due to terminating process just after opening perforation.

2 cl, 1 dwg, 1 ex