Constant-radius rolling controller and constant diameter impression total control method of the tube

摘要

A tube constant diameter rolling control method for controlling the rotation speed of a rolling roll 21 disposed in each stand when rolling the tube end portion of the tube 1 with each stand 2 of the constant diameter rolling mill. The rolling roll rotational speed control start time set for the stand is corrected on the basis of the measured thickness at the end of the tube measured on the exit side of the constant diameter rolling mill.