FIELD: machine engineering, namely apparatuses for forming joint of tube and plug by resistance contact butt welding at sealing rod fuel elements of nuclear reactors.
SUBSTANCE: apparatus includes assembled to pack annular electric current supply lead and casing of dielectric material. In said casing annular cooler-stop having increased resistance to welding current is arranged. Said cooler-stop is in the form of set of metallic plates electrically connected one to other by means of shunts placed in openings of apparatus. Said shunts are cylindrical ones and they are fixed in openings by means of plugs in which threaded screwed-in members are mounted. Openings are cylindrical ones and plugs are made of elastic dielectric material. Development length of shut surface exceeds circle length of opening where shut is placed.
EFFECT: simplified design, enhanced operational reliability and enlarged manufacturing possibilities of apparatus.
2 cl, 1 dwg
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