Explain cold rolling, a four high rolling mill is usually used.
This type of machine consist of four rolls, two smaller in size and other two bigger in size 1) The actual rolling is done by small size wheels and other two bigger wheels provide backup and necessary rigidity to the smaller rolls. 2) This mill is commonly used for hot as well as cold rolling of plates and sheets. By this rolling process different types of shapes are formed. Those are I-section, Tsection, etc.