Hot Rolling for Aluminum Sheet
The purpose of hot rolling in aluminum sheet production is to provide ingot for cold rolling or to produce thick aluminum plate of hot rolling state. There are three types of methods for hot rolling if classified by production scale: single-stand, double-stand and half continuous hot rollings. With single-stand hot rolling all relative processes, from cogging to hot rolling, are finished in one stand. Efficiency can be improved by application of large ingot and reverse mill. Four high driven mill helps to enlarge width and improve shape of aluminum sheets. The disadvantage of single-stand hot rolling is dissatisfying quality and efficiency because of quick fall of sheet temperature, large sheet thickness and relatively light sheet weight. Double-stand hot rolling consists of a reverse mill and a four high reverse driven mill. The first mill deals with cogging and rough rolling, then the plates are transferred to the second mill for precise rolling. In this way, rough rolling a...