Rolling control device, rolling control method

Abstract

[Problem] To control fluctuations in coil diameter caused by local changes in sheet thickness as a result of a necessity for opening the roll gap without rolling in part of the material being rolled. [Solution] This rolling control method rolls the material being rolled, takes the same up onto a tension reel, and controls the rolling mill such that rolling is avoided by releasing the rolls for a welding point (30) where rolling should be avoided. The rolling control method is characterized by the winding contour during uptake of the welding point (30) onto the tension reel being acquired and the roll release timing for releasing the rolls being acquired such that the length in the feed direction for the part for which rolling is to be avoided is a length corresponding to the winding contour. The rolling control method is further characterized by the timing when the welding point (30) arrives at the rolls being recognized and control being carried out such that the rolls are released based on the roll release timing and the arrival timing.

Description

technical field [0001] The present invention relates to a rolling control device, a rolling control method, and a rolling control program, and particularly relates to suppression of tension fluctuations when the thickness of a workpiece to be rolled changes locally. Background technique [0002] In the rolling mill, the tension of the workpiece to be rolled and the rolling load are controlled using the distance between the upper and lower work rolls, that is, the distance between the rolls, and the roll speeds of the equipment before and after the rolling mill, thereby performing the rolling operation. In the rolling operation, operate according to the pre-set control operation amount of the rolling mill, that is, the distance between the rolls and the speed of the roll, and implement the rolling process for the rolled piece that will be the control state of the rolling mill. Feedback control of the plate thickness, tension and rolling load to maintain the set value. [000...

AI Technical Summary

Problems solved by technology

However, the hardness of the rolled workpiece including the range M in the figure is different from that of other parts, which affects the feedback control of the rolling mill.

In addition, the state of the surface of the workpiece is also different from that of other parts, which may cause damage to the work rolls that are rolled in contact with the workpiece

Images