A control method for preventing strip breakage in annealing furnace of cold rolling processing line

Abstract

The invention discloses a control method for preventing strip breakage in the annealing furnace of a cold rolling processing line. A backup protection function is added to the original correction system. Ramp speed limit, early warning prompt system, tension compensation system control, when the strip steel deviates from the production center line by 50mm, the starting ramp speed limit is 60m / min, even if the shape of the incoming material is poor, the degree of deviation of the strip steel can be significantly reduced. It effectively avoids the serious deviation of the strip in the furnace, and at the same time greatly reduces the accident of strip breakage in the annealing furnace, so that the continuous and reliable operation of the cold rolling processing line is guaranteed.

Description

technical field [0001] The invention relates to the technical field of annealing furnaces of cold rolling processing lines, in particular to a control method for preventing strip breakage in the annealing furnaces of cold rolling processing lines. Background technique [0002] The cold-rolled vertical annealing furnace connects the steel strip end to end through narrow lap welding technology, and realizes continuous and efficient operation in the annealing furnace. The production process is highly automated, and the maximum speed of the process section is 370m / min per minute. When the strip steel is running at high speed and the shape of the incoming material is poor (such as poor raw material wedge shape, camber, wave shape, and drift), once the deviation correction capability of the EMG deviation correction system is exceeded, the strip steel running at high speed is easy to scratch the annealing furnace wall. Under the action of strip steel tension, it is very easy to cau...

AI Technical Summary

Problems solved by technology

When the strip steel is running at high speed and the shape of the incoming material is poor (such as poor raw material wedge shape, camber, wave shape, and drift), once the deviation correction capability of the EMG deviation correction system is exceeded, the strip steel running at high speed is easy to scratch the annealing furnace wall. Under the action of strip steel tension, it is very easy to cause a broken strip accident

The traditional method to prevent deviation in the furnace is manual control through operator intervention, which is difficult to timely and effectively control belt breakage accidents caused by deviation

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