- Classification of pressed metal types
- Rolling steel products are called black rolls.
- Rolling non-ferrous metal materials (copper, aluminum, etc.) products are called non-ferrous rolls.
- According to the temperature of the rolled material when it is rolled
- The rolling temperature higher than the recrystallization temperature of the rolled material is called hot rolling, and the corresponding roll is called hot rolling.
- The rolling temperature lower than the recrystallization temperature of the rolled material is called cold rolling, and the corresponding roll is called cold rolling.
- Classification according to the shape of rolled products
The hot-rolled strip products are called hot strip rolls, and so on, there are: cold strip rolls, sheet steel rolls, section steel rolls, seamless steel pipe rolls, bar and wire rolls, etc.
- Classification according to the function or location of the rolling mill on the rolling line
- The ones used in the blooming mill are called blooming rolls, and so on, there are rough rolling rolls, intermediate rolling rolls, pre-finishing rolls, finishing rolls,
- Pre-finishing rolls, back-end rolls, cross-cut smoothing rolls, slitting smoothing rolls, slitting rolls, vertical rolls, edge rolls, piercing rolls, tube rolling rolls, de-piping rolls, tension reducing rolls, straightening Roller etc.
- Classification according to the position of the roll on the rolling mill
- The rolls that are in direct contact with the rolled material are called work rolls.
- The rolls that support the rolling mill are called backup rolls, and the rolls in the multi-roll mill that are farthest from the work rolls are called backup rolls.
- In a multi-roll mill, the rolls between the work rolls and the backup rolls are called intermediate rolls.
- Classification by roll material
According to the classification of materials, the rolls are divided into four categories: cast steel rolls, cast iron rolls, forged steel rolls and powder metallurgy rolls.
- Classification by blank manufacturing method
- Integral roll (also called conventional casting roll)
- Lamination rolls (flush lamination, centrifugal lamination, CPC lamination, jet deposition lamination, etc.). in:
- The roll manufactured by the full-flush composite method of flushing the overflowing liquid metal from the core is called a full-flush roll;
- Only the liquid metal in the core of the roll body is flushed to the upper roll neck, which is called a semi-flushing roll;
- The composite roll manufactured by centrifugal composite casting method is called centrifugal composite roll;
- Composite rolls manufactured by CPC (Continuous Composite Casting) method are called CPC composite rolls.
- Mechanical combination roll
- Rolls manufactured by mechanical combination are called combined rolls.
- A roll made by mechanical combination and applying a certain pressure in the axial direction is called a prestressed roll.
- According to the size of the roller body
- Rolls are divided into large rolls and small rolls according to the size of the roll body.
- Cast steel rolls – those with a diameter of the roll body ≤ 500mm are called small steel rolls
- Cast iron rolls – those with a diameter of the roll body ≤540mm are called small iron rolls
- Forged steel rolls – those with roll body diameter ≤ 300mm are called small chill rolls
- Roll ring – net weight ≤ 1 ton, maximum diameter ≤ 1150mm is called casting small roll ring
