Abstract:
The modification of statement of electrochemical formation problem is
offered for mathematical modelling of the precision technologies.
As an example the process of cutting with a plate electrode-tool is considered. For the description
of the technologies with high localization of the processes a stepwise
function of current efficiency is used. It realizes for simulation of the anode dissolution
process in passivating electrolytes under short impulse current. This
function determines the movement rate of the anode boundary in the areas of an
active electrochemical dissolution and also it defines the boundaries of the
areas where dissolution is absent. The stationary and limiting-stationary
machining problems are formulated and solved on the base
of the offered model. The limiting model describes the maximum localization process. The stationary problem is characterized by the presence of anode
surface part, on which the current density is equal to a critical value.
Investigations in the whole range of ratio of the maximal and critical values
of electrical field strength on the anode surface are carried out.
Keywords:electrochemical shaping; stepwise function;
process localization; stationary model.
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