PROCESS OF MICROPLASMA OXIDATION OF VALVE METALS AND THEIR ALLOYS AND GEAR FOR ITS IMPLEMENTATION Russian patent published in 1999 - IPC

FIELD: microplasma electrolytic machining of surfaces of metal articles, mechanical engineering, aircraft industry, chemical, petrochemical and other industries. SUBSTANCE: proposed process of microplasma oxidation of valve metals and their alloys includes submersion of part into electrolyte, setting of initial intensity of polarization current in electric circuit, curing of part till coat of preset thickness is formed, removal of forming voltage, removal of part and subsequent washing of it. Submersion of part into electrolyte is performed at rate determined by dependence V=A exp(Bv = Aexp(B•N),N), where V is submersion rate of part, sq.dm/min; N is output power of power supply source. After finish of formation of coat voltage in electric circuit is decreased till single stray microplasma discharges emerge on machined surface and curing is continued to moment of complete quenching of these single stray microplasma discharges. Gear to implement process described above has bath with cooling agent where electrolyzer is placed, control unit, mechanism of vertical and horizontal movement of machined part and its transfer from electrolyzer into bath. EFFECT: enhanced wear and corrosion resistance of machined parts, low cost of machining of wide spectrum of samples. 3 cl, 1 dwg