METHOD FOR CONTROLLING SHAPE OF STEEL IN LOW-SPEED PART OF COLD ROLLER

摘要

PURPOSE: A method for controlling shape of steel in low-speed part of cold roller is provided which stabilizes roll force and tension and prevents elastic deformation, thereby improves the shape quality of a rolled plate accordingly by minimizing the change of lubrication properties at the low speed section, that is, the front and rear parts of the rolled plate. CONSTITUTION: The method for controlling shape of steel in low-speed part of cold roller comprises a first step(S51) of detecting rolling speeds for each of the front and rear stands in the cold rolling process; a second step(S52) of differently controlling the spray amounts of coolant per rolling speeds based on the detected rolling speed of the front stand in the front stand of the cold rolling process; a third step(S53) of differently controlling the spray amounts of coolant per rolling speeds based on the detected rolling speed of the rear stand in the rear stand of the cold rolling process; and a fourth step(S54) of proceeding the first step(S51) when the rolling is not completed and terminating the total control process when the rolling is completed after judging whether the rolling is completed or not.