| 主权项 |
1. An integrated rolling mill with transverse rolling for rolling seamless tubes from a full-section billet, said rolling mill defining a first rolling axis, comprising:
a piercing stand having rolling rolls with respective skewed axes, having a rolling axis thereof coinciding with said first rolling axis adapted to produce a first tube having a first rolled product length after the piercing operation of said full-section billet, at least one finishing stand having rolling rolls with respective skewed axes, having a rolling axis thereof coinciding with said first rolling axis, adapted to produce a second tube, starting from the first tube, having a second rolled product length after a finishing operation of the first tube,characterized in that the at least one finishing stand is arranged downstream of the piercing stand at a distance not smaller than the length of the first rolled product, so that during the rolling operations the front end of the first tube may only be gripped by the finishing stand once the rear end of the first tube is no longer gripped by the rolling stand,and in that it comprises at least one stake provided with an end tip adapted to pierce and roll the billet, a first portion having a length greater than the length of the first rolled product, an intermediate tip, adapted to roll the first tube to transform it into a second tube, a second portion having a length greater than the length of the second rolled product, wherein a same stake is used for the piercing operation on the piercing stand and also for the finishing operation on the finishing stand. |
