STRIP BREAKAGE PROCESSING METHOD CAPABLE OF GRADUALLY STOPPING THE ROTATION OF A TENSION REEL AND A ROLLING ROLL WHILE SEPARATING ONE OF AN UPPER AND LOWER PART ROLLING ROLES FROM A STEEL PLATE IN CASE A STRIP BREAKAGE OCCURS

摘要

PURPOSE: A strip breakage processing method is provided to improve productivity by preventing damage to a facility due to a strip breakage, by stopping the steel sheet transferring role after a certain amount of time.;CONSTITUTION: A strip breakage processing method comprises the following steps: determining(S100) a strip breakage during steel sheet rolling; stopping(S200) a rolling line by stopping(S220) the rotation of a rolling roll while separating(210) a rolling roll(100) from a steel sheet to prevent damage of a facility by decreasing the length of mass flow in a steel sheet rolling. The separation step(S210) of a rolling roll includes the separation of one from the other between the upper part rolling roll(110) and the lower part rolling(120) roll by lifting up or down one of the upper and the lower part rolling roll. The rolling roll stopping step includes the operation for stopping the rotation of the rolling roll by gradually degrading the rotation speed. The rolling roll stopping step includes the operation for stepping down the rotation speed of the rolling roll to reduce the friction between roles composing the rolling roll.;COPYRIGHT KIPO 2013;[Reference numerals] (S100) Step of determining a strip breakage during steel sheet rolling; (S200) Step of stopping a rolling line when a strip breakage occurs; (S210) Step of lowering a lower rolling roll; (S220) Step of stopping a rolling roll; (S230) Step of stopping a tension roll; (S240) Step of stopping a snubber roll; (S250) Step of stopping a steel sheet feed roll