A processing method for open-end folding of a coreless hot coil box

By detecting sudden changes in the thickness of the intermediate billet and adjusting the shearing length of the flying shear system, the problem of opening and closing folds in the mandrel-less hot coil box was solved, equipment accidents were avoided, and production efficiency was improved.

CN122099074APending Publication Date: 2026-05-29ANGANG STEEL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ANGANG STEEL CO LTD
Filing Date
2026-03-10
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing technologies have failed to effectively solve the problem of folding at the opening and closing of mandrel-less hot coil boxes, resulting in the inability of the inner end of the steel coil to open normally, causing the tail steel plate to fold, affecting production efficiency and potentially leading to serious equipment accidents.

Method used

By detecting sudden changes in the thickness of the intermediate billet, and utilizing the coordinated operation of the hot rolling box and the flying shear system, the shearing length is automatically adjusted to avoid the folded parts, enabling rapid shearing and notifying the operator.

Benefits of technology

This effectively avoids accidents such as blade breakage of flying shears and roll breakage in rolling mills caused by folding, thus improving production continuity and equipment protection.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application relates to hot strip production process technical field, specifically to a kind of coreless hot coil box open tail folding processing method, comprising: receiving intermediate blank thickness, for the equipment preset of hot coil box;After hot coil box completes coiling and uncoiling, when the hot metal detector HMD at the outlet of hot coil box becomes OFF state, according to the distance of slab tail reaching flying shear is calculated based on speed parameter;The thickness of slab tail is detected using pinch roll at the outlet of hot coil box;When the thickness of slab tail is detected and the thickness mutation value reaches the threshold range of preset, it is determined that tail uncoiling fails, and an abnormal instruction is sent to flying shear cutting system;After flying shear cutting system receives the abnormal instruction, on the basis of preset cutting gauge length, increase compensation length, generate updated tail cutting length;Flying shear cutting system starts cutting according to updated tail cutting length, so that actual cutting position avoids folding part of slab tail.The present application avoids flying shear blade collapse even mill broken roll accident.
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