ROLLING OF METAL

**Definition:** This place covers:

Methods and devices for rolling of metal.

Rolling is a metal forming process in which metal is passed through a pair of rotating rolls for plastic deformation of the metall. Rolling is classified according to the temperature of the metal rolled. If the temperature of the metal is above its recrystallization temperature, then the process is termed as hot rolling. If the temperature of the metal is below its recrystallization temperature, the process is termed as cold rolling.

A rolling mill is a machine for plastic deformation of metal between rotating rolls. In a broader sense, a rolling mill is an automatic system or line of machines that performs both rolling and auxiliary operations: transport of the original billet from the stock to the heating furnaces and the mill rolls, transfer of the rolled material from one groove to another, turning, transport of the metal after rolling, cutting into sections, marking or stamping, trimming, packing, and conveyance to the stock of finished product.

This subclass includes the following main groups:

Rolling of metal in general:

B21B1/00 , B21B11/00 - B21B13/00

B21B37/00

B21B38/00

B21B35/00 , B21B39/00 , B21B41/00

B21B27/00 , B21B29/00 , B21B31/00

B21B28/00

B21B33/00

B21B43/00

Rolling of special formats:

B21B17/00 , B21B19/00 , B21B23/00

B21B25/00

B21B5/00

Rolling of special alloys:

B21B3/00

Rolling of metal under special conditions (e.g. in vacuum or inert atmosphere):

B21B9/00

Auxiliary measures for metal rolling:

B21B15/00 , B21B45/00 , B21B47/00

**Limiting references (this place does not cover):** - Descaling of rod or wire -> B21C43/04 - Separating tubes from mandrel -> B21C45/00 - Technical details of coiling/ uncoiling devices -> B21C47/00 - Technical details of devices for temporarily accumulating material -> B21C49/00 - Manufacture of particular objects by rolling, e.g. screws, wheels, rings, barrels, balls -> B21H