Laboratory investigation of the continuous seamless-tube rolling process (Mandrel mill process) using models

This paper reports the results of an experimental investigation into the dependence of the tube-shape and -dimensions on the variation of mandrel velocity and on the values of the tension and the back-tension in the rolling of aluminium tubes in a laboratory two-high rolling mill. The causes of wall-thickness and diameter variations in the rolled tube are identified and the possibilities of controlling the cross-section of the tube are explored.