A Method to Eliminate Length Deviation of Strip Uncoiling

Abstract

The invention relates to a method for eliminating uncoiling length deviation of strip steel. While a production plan is issued, unqualified steel rolls of which the outer diameters issued by all the systems are greatly different from the practical outer diameters are recognized immediately through information error-proofing early-warning treatment before rolling of the steel coil, so that the strip steel output length error of the strip steel caused by threading of the unqualified steel rolls is avoided, the production accidents that the strip steel is broken due to overlong output strip steel during uncoiling and feeding or a pinch roll is overloaded and jumps due to not enough output length are avoided, the process stability and the automation degree of the modernized batch production of the steel rolls are improved, and the method is suitable for the uncoiling and threading operation fields of various strip steel.

Description

technical field [0001] The invention relates to the field of metal strip uncoiling and threading operations, in particular to a method for improving uncoiling precision by correcting steel coil information before strip uncoiling. Background technique [0002] At present, in the field of iron and steel production, the uncoiling and threading operation of steel coils is indispensable for the modern steel continuous annealing line process. Before the strips are stitched or welded, the subsequent strips must be uncoiled by the uncoiler and then threaded. To the welding machine or sewing machine, the basic process of automatic uncoiling and threading of steel coils in the current continuous operation line is as follows: [0003] The steel coil is inserted into the uncoiler mandrel after being aligned in height, followed by a fully automatic uncoiling and threading process. The whole process includes: mandrel outer bearing support rising → uncoiler pressure roller, tape threading...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the excessive angular velocity existing in the prior art and cause the strip steel output by the decoiler to be too long, the excess length of strip steel is suspended between the pinch roller and the uncoiler or the outer diameter of the strip obtained in the basic automation control system is greater than When the actual initial outer diameter is used, the uncoiling angular velocity of the steel coil calculated according to this parameter will be too small, resulting in the problem that the length of the steel strip conveyed by the steel coil is insufficient. The invention provides a method for eliminating the deviation of the uncoiling length of the steel strip. The strip width, coil weight, specific gravity and other information obtained in the system calculate the initial outer diameter of the steel coil through an approximate method, and compare it with the outer diameter issued by the production process control system to identify the error range that the unit can tolerate The "problem steel coil" eliminates the production hidden danger caused by the error of the outer diameter of the steel coil. The present invention is specifically as follows:

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