DESCALING CONTROL APPARATUS AND METHOD IN PLATE ROLLING MILL

摘要

The present invention relates to a descaling control device used in a thick plate rolling process and a control method thereof. The control method comprises the steps of: setting a descaling pattern by a control part based on the temperature distribution of a slab inputted from a temperature measuring part; judging whether or not the front end of the slab is entered into a descaling spot by the control part based on detected signals inputted from a slab detecting part; and controlling a spraying and driving part by the control part according to the descaling pattern when the front end of the slab is entered into the descaling spot. The present invention can uniformly maintain the temperature of the slab by controlling the spraying pressure of a descaler based on the temperature distribution of the slab in the thick plate rolling process. Also, the present invention can accurately control a descaling process because the position of the front end of the slab can be predicted by detecting the position of the rear end of the slab where cleanliness is higher than around a rolling mill. [Reference numerals] (AA) START;(BB) END;(S100) Receive the temperature distribution of a slab;(S110) Set a descaling pattern based on the temperature distribution;(S120) Grasp the position of the rear end of the slab;(S130) Predict the position of the front end of the slab;(S140) Calculate the estimated time of entry;(S150) Is the estimated time of entry passed?;(S160) Control the spraying pressure of a descaler according to the descaling pattern