Method for detecting the temperature of the head of a steel billet based on direct rolling

By using a pyrometer and PLC system for high-frequency scanning and automatic scrap rejection during the direct rolling process, the problem of inaccurate temperature detection at the billet head was solved, achieving accurate temperature detection and automatic scrap rejection, thus improving production efficiency.

CN117324404BActive Publication Date: 2026-06-12SHAANXI IRON & STEEL (GRP) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHAANXI IRON & STEEL (GRP) CO LTD
Filing Date
2023-10-17
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

In existing technologies, the temperature detection of the head of the billet in direct rolling is inaccurate, resulting in large temperature differences in the billet, which cannot meet the rolling requirements. In addition, manual scrap removal leads to high labor intensity and high equipment failure rate.

⚗Method used

A pyrometer is used to measure the real-time temperature of the steel billet. The PLC control system performs high-frequency scanning and continuous comparison to calculate the highest temperature at 1.5m from the top of the steel billet and compare it with the set temperature. Unqualified steel billets are automatically rejected.

🎯Benefits of technology

It improves the accuracy of billet head temperature detection, reduces manual labor intensity, lowers equipment failure rate, and increases production efficiency.

✦ Generated by Eureka AI based on patent content.
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Abstract

The application discloses a billet head temperature detection method based on direct rolling, and particularly relates to the following steps: measuring the temperature of the billet, reading the real-time temperature, high-frequency scanning the real-time temperature of the billet, continuously updating, transmitting the last updated real-time highest temperature to the final highest temperature, and displaying the final highest temperature on the WINCC system main screen; comparing the calculated final highest temperature with the set lowest rolling temperature to determine whether to discard the billet, and resetting the last updated real-time highest temperature of the PLC control system to 0 when all the billets pass through the pyrometer or the discarding of the billet is completed; and performing the above steps until the temperature measurement of all the billets is completed. Since the highest temperature is calculated by the high-frequency scanning and continuous comparison method, the accuracy is higher than that of the fixed-point measurement, and the highest temperature of the head 1.5 m can represent the real temperature condition of the billet, so that the low-temperature billet caused by human factors is avoided from entering the rolling mill, and the production efficiency is improved.
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