HIGH-SPEED CUTTING METHOD FOR HOT ROLLED STEEL SHEET

摘要

PURPOSE:To produce the thick steel plate which is free from bending at front and rear ends with high efficiency by rolling down the steel plate to locally reduce the thickness in the desired cutting position thereof by a finishing mill. CONSTITUTION:The steel plate progresses in the direction of an arrow 11 and is rolled down to the thickness reduced by a length L1 from the thickness T1 until the thickness (t) of the position 10 to be cut attains the prescribed thickness; thereafter, the thin part is further rolled by a length l and the thickness T1 is returned to a thickness T2 via a length L2. The steel plate is tracked with the thin part as a cutting point and is cut by a high-speed strip shear 4.