ELECTROCHEMICAL TREATMENT PROCESS Russian patent published in 2005 - IPC

FIELD: machine engineering, possibly working of through openings of any contour in sheet materials.

SUBSTANCE: one of tool-electrodes is connected to negative pole of electric current source and with use of template placed on blank at side of said tool-electrode electrochemical treatment is performed by depth consisting 0.75 - 0.8 of blank thickness. After disconnecting first tool electrode from current source second tool-electrode is connected to negative pole of DC source and electrochemical treatment is performed with use of other template placed on blank at side of second tool-electrode in order to form predetermined size opening. At electrochemical treatment templates are arranged coaxially according to position of worked opening. Template used for treating with use of first tool-electrode has working contour equivalent to that of worked opening and reduced by value of lateral widening of opening. Other template has working contour corresponding to predetermined profile of worked opening. Thickness value of first template is twice less than that of second template.

EFFECT: enhanced accuracy of geometry of worked openings.

3 cl, 3 dwg, 1 ex