Method, control and/or regulating device, and reversible hot rolling mill for operating coils of a coiler heating furnace of a reversibly operating hot rolling mill

Abstract

The invention relates to a reversibly operating hot rolling mill (1), a control and / or regulating device (7) for the hot rolling mill (1) and a reversibly operating hot rolling mill (1). ) method for a coiler heating furnace drum (5,6), wherein the strip length wound on the drum (5,6) is determined according to the rotation angle of the drum (5,6), In this case, the length of the strip wound on the reel is determined as a function of time, wherein a smaller first angle and a larger second angle are predetermined at which the rolling mill should be formed at the earliest or at the latest. Strip tension between the frame and the drum, wherein the drum is operated such that there is at least one angle between the smaller angle and the larger angle, and in the at least one angle, The angle-dependent tape length wound on the drum is equal to the time-dependent tape length wound on the drum.

Description

technical field [0001] The invention relates to a method for improving the mode of operation in a metal strip coiling process with reversible treatment of the metal strip in a hot rolling train. Background technique [0002] In reversingly operating hot rolling trains, so-called Stekel hot rolling mills, the strip is led into slots or slots in the coils of the coiler furnace for intermediate heating. The mandrel on which the metal strip is wound is generally stationary in the coiler furnace. After the threading process is over, the drum is accelerated so that the metal strip can be wound up and the traction between the drum and the frame is established. [0003] Today it is done in such a way that the reel runs with maximum acceleration to a constant peripheral speed. This constant peripheral speed is equal to the product of the metal strip speed and a guidance factor greater than one. [0004] Thus, the metal strip is suddenly tensioned at any point as the reel rotates. ...

AI Technical Summary

Problems solved by technology

[0005] The disadvantage of this technical solution is that the metal strip will be pulled out of the threading gap due to a sharp pull

Depending on the geometry of the coiler oven, the mandrel and the tape feed in the coiler oven, this can lead to problems and even interruptions in the coiling process, since the jerk described above can cause For example, a metal strip threaded into a drum is loose

Furthermore, various relative movements of the wound metal strip and / or its strip surface relative to the drum or another winding section can lead to visible surface damage, especially scratches

This leads to an undesired reduction in the economic value of the metal strip

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