Method of rolling a metal strip with adjustment of the lateral position of a strip and suitable rolling mill

摘要

A method of rolling a strip is provided. The method includes determining a value representative of the lateral position of the strip along a line transverse to a run direction downstream of each stand and calculating algebraic differences between the lateral positions and a reference position. A value of additional tilt is calculated from the algebraic differences to bring the algebraic differences below a predetermined threshold. Calculating the additional tilt values includes multiplying the algebraic differences by a gain matrix K that is determined by modeling relationships linking the algebraic differences and the tilts of the stand rolls. The additional tilt value is transmitted to each of the stands. The steps are repeated at predetermined time intervals until the strip is no longer gripped in the nip of the last stand of the rolling mill. A device for adjusting the lateral position of a strip is also provided.

主权项

1. A method of rolling a strip in a rolling mill for metal products, which mill has at least two stands in the nips of which said strip is simultaneously gripped, whereby a lateral position of said strip is adjusted, said adjustment comprising the following steps:
simultaneously determining a value representative of the lateral position of the strip along a line transverse to a run direction downstream of each of the stands in the nips of which the strip is gripped and calculating algebraic differences between the lateral positions and a reference position; calculating a value of additional tilt to be imposed on each of the stands from the algebraic differences so as to bring the algebraic differences below a predetermined threshold, the calculating of the additional tilt values including multiplying the algebraic differences by a gain matrix K determined by modeling relationships linking the algebraic differences of the strip and the tilts of the stand rolls of the rolling mill; transmitting respective additional tilt values to each of the rolling mill stands; and repeating the steps at predetermined time intervals until the strip is no longer gripped in the nips of the last stand of the rolling mill.