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川崎製鉄技報 KAWASAKI STEEL GIHO

Vol.7 (1975) No.1

焼鈍炉の計算機制御について

Computer Control of Tight Coil Annealing Line

伊藤 実(Minoru Ito) 岸本 俊治(Shunji Kishimoto) 伊藤 しんご(Shingo Ito) 竹 内 三郎(Saburo Takeuchi) 要旨 : 千葉製鉄所におけるタイトコイル焼鈍炉の計算機制御システムは1972 年 4 月に稼働を始め た。導入の主目的は焼鈍炉の集中管理システムにより少ない要員で精度の高い温度制御を 行うことである。この計算機システムを十分に活用することによって効率的な焼鈍炉の操 業が可能になった。当システムの特徴を以下に示す。(1)適正な昇熱曲線の選択により,焼 鈍能率の向上と昇熱時間のバラツキの減少による品質の安定がはかられる。(2)昇熱曲線の 指定が任意にできる。(3)CRT により炉況表示が任意にできる。(4)コイルの積込条件チェッ クができる。(5)点火開始,冷却完了時刻など工程時刻が予測できるので次の作業段取が計 画的かつすみやかに行える。(6)プロセスの異常警報を瞬時に出せる。(7)自動データ収集と 工程管理用データの出力ができる。 Synopsis :

The computer control system came into operation in April 1972, with the main purpose of controlling the annealing temperature with high accuracy and less personnel by the centralized control of the annealing furnace. A full utilization of the system permits an effective operation of the furnaces. The main characteristics of the system are as follows; (1) An optimum heating curve for each charging coil is selected by this system, to obtain high annealing efficiency, less deviation of heating time and stabilization of product quality. (2) The process state of each furnace is indicated by CRT display. (3) The charging conditions of coils are checked. (4) The heating and cooling time can be estimated so that the subsequent works are scheduled easily. (5) Process abnormalities are alarmed instantaneously. (6) Automatic data logging and output of process control data.

(c)JFE Steel Corporation, 2003

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