A Coiler Coiler Aid Roller Step Control Correction Method

Abstract

A method for correcting the step control of the roll-assisting roll of a coiler, using a pressure detection system to calibrate the moment when the head of the strip steel bites into the roll-assisting roll to generate pressure, and feeding back the value of the calibrated time point to the theoretical calculation system, Correct the theoretical calculation value, so as to establish a correction link between the theoretical arrival time point of the winding aid roller and the stepping control action, and overcome the inconsistency of the actual winding aid roller time point caused by a series of objective reasons, and eliminate the The deviation of step control accuracy caused by the deviation of the initial arrival time point before step control causes indentation defects without excessive cost.

Description

technical field [0001] The invention belongs to the field of hot-rolling coiling technology, and in particular relates to a method for controlling and correcting steps of coiling-assisting rolls of a coiler. Background technique [0002] The coiler is an important equipment of the hot rolling production line, which is used to coil the hot-rolled steel strip into steel coils. It is located after the finishing rolling unit and is the last process of the hot rolling production line. It mainly includes main equipment such as roller table, side guide plate, pinch roller, reel, three auxiliary rollers and hydraulic cylinder of auxiliary roller. Among them, the roller table is mainly responsible for transporting the strip steel from the finishing rolling unit to the coiler unit. The main function of the side guides is to center the strip. The main function of the pinch roller is to apply a certain clamping force to the strip steel at the head biting stage, and at the same time im...

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Problems solved by technology

[0005] However, the actual application shows that this technology has a disadvantage: the coiler relies on the hot metal detector in front of the pinch roll or the pressure sensor of the pinch roll to detect the signal of the strip head, and the signal of the strip head after entering the pinch roll Tracking is generally obtained by theoretical calculations

[0006] (1) For strips of different steel types, different thickness specifications, different width specifications, and different coiling temperatures, the strip steel may be bent to varying degrees under the action of deformation resistance;

[0007] (2) The degree of wear of various mechanical equipment of each coiler is different, and the resistance received by the strip head when it passes is also different;

[0008] (3) Due to the different shapes of the strip heads, there are differences in the resistance of each strip head when the strip is threaded

[0009] To sum up, since the tracking of the strip head after entering the pinch roller is completely obtained by theoretical calculation, the subsequent stepping control accuracy is poor, resulting in a poor control effect of the head embossing defects

[0010] In view of the above problems, the prior art solves this problem by adding a laser detection device to the coiler, but these newly added devices not only increase the investment, but also the location of these devices is in poor working condition and difficult to maintain

In addition, water and fog in the coiler will affect the detection accuracy and even cause false signals

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