ELECTROPULSE PIERCING METHOD OF PIPES IN OUT-OF WAY PLACES Russian patent published in 2010 - IPC B21D26/10 B21D39/04 

FIELD: metallurgy.

SUBSTANCE: invention relates to pressure materials processing with usage of energy of electric explosion of metallic conductor in liquid transfer medium and relates, particularly deformation and piercing of pipes of wide range of configuration and geometry in out-of-the-way places. Pipe is installed into opening of tube plate, it is located at the end of pipe pre-assembled structure, consisting of exploding element in the form of ring made of foil, located at the butt of strength cylinder made of dielectric, allowing through co-axial opening, in which it is located rod electrode, connected by electric contact to central part of ring made of foil. It is used the second electrode in the form of clenching metallic bushing, located at cylinder from the condition of providing of fixation on its side surface of peripheral part of ring, connected to rod electrode and bearing on centering insulating chain gears of core insert with installed on it director cone and figure of revolution, implemented of strong material. It is implemented location of figure of revolution and director cone of mentioned structure in area of pipe straining filling of pipe cavity by transfer medium, waterproofing of pipe by flexible plug of one butt and washer of the other, implementation of electric explosion of explosion element. Additionally in used pre-assembled structure of ring surface made of foil are implemented with profile by hyperbolic function, of thickness, increasing partly. Core insert is connected to rod electrode by means of filler, reinforced by metallic conductors, allowing at side surface symmetric longitudinal stringers, external diametre of which is equal to inner diametre of pipe.

EFFECT: there are increased method efficiency and coefficient of efficiency.

6 dwg, 1 ex