METHOD FOR CONTROLLING THICKNESS OF STRIP IN TWIN ROLL STRIP CASTING PROCESS

摘要

PURPOSE: A thin plate thickness controlling method of a twin roll strip casting process is provided to control the thickness of a thin plate, which is periodically changed by eccentricity to be equal to a target thickness so as to minimize thickness error. CONSTITUTION: A thin plate thickness controlling method of a twin roll strip casting process comprises the following steps. Thickness feedback measured by a thickness-meter is synchronized with a casting roll rotation angle, and a thickness difference between the thin plate thickness and a target thickness is stored in a data storage buffer. When the casting roll has been rotated once, the thickness different data stored in the data storage buffer is digital-signal-processed to calculate eccentricity of the casting roll. A casting roll cylinder is PID-controlled with a sine wave satisfying an amplitude and a phase in which the calculated eccentricity is restrained.