Hot strip mill with multiple rollers - has two final stages controlled by computer to maintain constant material thickness

摘要

The strip of material to be rolled is fed (12) through shears (11) and seven stages of heated rollers (1 to 7) before cooling over a roller track (14) to a winding assembly (10) which produces rolls of the strips (15) to be carried away from the mill. The material is reduced in thickness from 35mm to 2 mm. The output speed of the mill is 14 metres per second. The material thickness is measured (8) as it emerges from the last roller stage (7). The measurement signal is used to control the last two pairs of rollers (6,7) via a computer (9). The gaps between the rollers are controlled by hydraulic rams.