Control method for preventing strip breakage in annealing furnace of cold rolling treatment line

Abstract

The invention discloses a control method for preventing strip breakage in an annealing furnace of a cold rolling treatment line. A backup protection function is added on the basis of an original deviation rectifying system. A primary control system acquires data of deviation rectifying equipment through a communication protocol. Through the control of the ramp speed limitation of the primary control system, an early warning prompt system and a tension compensation system, the ramp starting speed is limited to 60 m/min when strip steel deviates from a production center line by 50 mm, so that the deviation degree of the strip steel can be obviously reduced even if an incoming plate type is poor, and serious deviation of the strip steel in the furnace is effectively avoided. Meanwhile, stripbreakage accidents in the annealing furnace are greatly reduced, and continuous and reliable operation of the cold rolling treatment 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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