FIELD: metallurgy.
SUBSTANCE: twisting of the pipe, installed in the clamps is performed by rotating the movable clamp relative to the stationary one with the twisting area local heating by the inductor, moving when twisting along the pipe axis from the movable clamp to the stationary clamp. During the inductor moving process behind the pipe heating area, the cooling area, localizing the heating area, is created, by supplying the cooling medium to the pipe, and twisting is performed in the formed localized heating area.
EFFECT: expansion of pipes twisting technological possibilities by means of the mandrels and fillers exclusion.
3 cl, 3 dwg
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