METHOD FOR ROLLING PIPE stretch-reducing mill

摘要

A method of rolling tubes on the stretch-reducing mill comprising a deformation of the hollow shell rolls on the mandrel mill stands, characterized in that the deformation of the hollow shell in the first mill stand is carried out on a short cylindric mandrel furthermore compression wall in the first mill stand at steady state on a cylindrical portion of the mandrel should be less than the value determined by the formula: Δ - compression wall - predetermined relative tension, h - the thickness of the tube wall, d - diameter of the pipe.