US 6,148,653 A · Rolling apparatus and a rolling method

Abstract

The present invention aims to provide a rolling system and a rolling method capable of avoiding the occurrence of a pinch fold by effectively preventing the zigzag movement of a rear end portion of a material to be rolled. The rotational speeds (rolling speeds) of work rolls (2) of a rolling mill stand (F.sub.1) from which the rear end of a plate material (6) releases, and a succeeding rolling mill stand (F.sub.2) are controlled to the same value. Moreover, the tension between the rolling mill stand (F.sub.1) and the rolling mill stand (F.sub.2) is controlled to zero. The difference in tension between a work side and a drive side can be made null between the rolling mill stand (F.sub.1) and the rolling mill stand (F.sub.2). Similarly, the difference in tension between the work side and the drive side can be made null between the plurality of rolling mill stands (F.sub.2 to F.sub.n) during release of the rear end of the plate material (6).

Claims11

Dependent claims

A rolling system comprising:

a plurality of rolling mill stands including work rolls accommodating sequential transport of a material to be rolled therebetween, said work rolls being driveable to rotate and being driveable to screw down toward the material;
strip travel condition detecting means for detecting a rolling state of the material to be rolled including position detecting means for detecting a moving position of a rear end portion of the material and generating an end detection signal;
and
control means for controlling the work rolls based on the end detection signal from the position detecting means for reducing tension of the material being rolled to zero.

1 more element

A rolling method for performing rolling by sequentially transporting a material to be rolled to a plurality of rolling mill stands, comprising:

detecting a strip travel condition of the material to be rolled;
rolling the material to be rolled, while driving work rolls of the rolling mill stand so as to rotate and screw down, in accordance with the travel situation;
and
adjusting rotational speeds of the work rolls of the rolling mill stands when a rear end of the material to be rolled is detected to be immediately before being released from the rolling mill stand, so that the tension of the material to be rolled, located between the rolling mill stand immediately before release therefrom of the rear end of the material to be rolled and the rolling mill stand that follows it, will become zero.

1 more element

Dependencies are inferred from the claim text.

Rolling apparatus and a rolling method

Life of this patent

Rolling apparatus and a rolling method

Life of this patent

Abstract

Claims11