Critical Degree of Billet Deformation in Closed Gauges of a Tube-Forming Mill

Preforming Quality of Tube Billets as an Efficiency Criterion for the Production of Longitudinally Welded Tubes

“…The bend deforming degree of the central and the intermediate strip segment, which excludes their residual deforming at the outlet from the rolls, is determined by the range of the coefficient k, the limits of which are stipulated by grade of steel tubes and obtained by finite element simulation of the forming process [5][6][7][8], as well as by calculation of the springing radius of tube billet by the following equation [9]:…”