A method for improving strip tracking accuracy

Abstract

The invention provides a method for improving band steel tracing precision. In the method, an alsthom programmable logic controller is used for programming and modifying programs related to the PLC (Programmable Logic Controller), detection means and communication interfaces are added, a system and a partition structure are both improved, the system and each component function are developed, datadetection and storage accuracy of export final coils is improved by effective communication and contact between a material tracing system and related systems, and data of steel coils is avoided from being lost; precision of an on-line tracing system is improved, a correction speed for processing a welding seam is doubled; system architecture is optimized, so that processing time is shortened to be 500 ms, an error value of program computation for the welding seam is reduced by five times; quantity and quality of online steel band data are both improved, double-hole detection alarming and realtime display are both implemented, unqualified coils are automatically judged, spoilage and defective work losses can be reduced, and yield of products is improved.

Description

technical field [0001] The invention belongs to the field of automatic control, in particular to a method for improving the tracking accuracy of strip steel in a cold-rolling continuous annealing unit. Background technique [0002] The material tracking system is a system for online monitoring of welding seam position, automatic adjustment of process parameters, detection and storage of relevant data of finished products. The material tracking system of the continuous annealing unit of a cold rolling mill adopts the programmable logic control system (PLC) produced by Alstom Company of the United States. For the zinc unit, due to the low unit speed and low requirements for tracking accuracy, it can still be adapted. It is the first case that a cold rolling plant is applied in a high-speed continuous annealing production line. [0003] Due to the tracking accuracy, the material tracking system cannot adapt to the requirement of the continuous annealing unit with a strip stee...

AI Technical Summary

Problems solved by technology

The material tracking system of the continuous annealing unit of a cold rolling mill adopts the programmable logic control system (PLC) produced by Alstom Company of the United States. Zinc unit, due to the low speed of the unit and low requirements for tracking accuracy, it can still be adapted

It is the first case that a cold rolling plant is applied in a high-speed continuous annealing production line

[0003] Due to the tracking accuracy, the material tracking system cannot adapt to the requirement of the continuous annealing unit with a strip steel running speed of up to 820m / min, resulting in inaccurate tracking and positioning, and unable to shield the leakage defect of the steel plate, resulting in inaccurate weld calibration

At the same time, the material tracking system cannot realize the accuracy of logic during high-speed operation, and cannot realize automatic shearing when there are leaks near the weld seam of the strip steel, and causes the roll to be pulled when the rolling force is reduced when the strip steel passes through the weld seam. ;When producing small rolls, the roll data on the export walking beam is easy to lose; when the tracking system fails, the data on the production line is not stored, resulting in the loss of finished product data, which seriously affects the accuracy of the material tracking system and directly leads to a decline in the yield of finished products