supporting roller group

The rolling mill set is the core component combination in rolling equipment such as steel rolling, aluminum rolling, copper rolling, etc. It is composed of two or more rolling mills, matched with auxiliary components such as bearing seats, frames, and adjustment mechanisms. Through the relative rotation of the rolling mills, pressure is applied to the metal billet, causing it to undergo plastic deformation and roll into specific specifications of plates, profiles, pipes, and other products.Core FeaturesStructural composition: The main body is a pair or group of rolling rolls (such as working r...

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Detailed Description
Product Encyclopedia

Core Features

Structural composition: The main body is a pair or group of rolling rolls (such as working rolls and supporting rolls), with supporting components including bearings, bearing seats, rolling roll spacing adjustment devices, transmission devices, etc. Some rolling roll groups are also equipped with cooling and lubrication systems.

Working principle: When a metal billet passes through the gap between the rolling rolls, the rolling rolls rotate and squeeze the billet, changing its cross-sectional size and shape, while improving the metallographic structure inside the metal, enhancing product strength, hardness, and other properties.

classification basis

According to the number of rolling rolls, it can be divided into two roll group, three roll group, four roll group, six roll group, etc;

According to usage, it can be divided into hot rolling roller group, cold rolling roller group, profile rolling roller group, sheet rolling roller group, etc.

Common aliases in the industry

Common terminology

Roll components

Roll mill unit (colloquial abbreviation, focusing on complete equipment attributes)

Call it by function/structure

Working roll group (specifically referring to the combination of rolls that directly contact the billet)

Supporting roll set (used to support working rolls and improve rolling accuracy)

Roller unit assembly (more written, emphasizing complete component combination)

Industry specific terminology

Steel rolling industry: it is often called roll memorial archway (it is named because the frame where the roll is installed looks like memorial archway, and roll group and memorial archway are collectively called roll memorial archway in some scenes)

Aluminum processing industry: often referred to as rolling mill units or rolling mill units.

The core working principle of the rolling mill group is to use the relative rotation and extrusion force of the rolling mill to cause plastic deformation of the metal billet, thereby rolling it into profiles or plates of specific sizes and shapes. The specific working process and key mechanisms are as follows:

Power transmission and rolling mill rotation

The motor drives the rollers in the rolling mill group to rotate in the same or opposite direction (adjusted according to the rolling process requirements) through transmission mechanisms such as reducers and gearboxes. Paired rollers will reserve a pre-set gap between them, and the width of this gap determines the thickness or cross-sectional size of the rolled product.

Raw material feeding and extrusion deformation

Metal billets (such as steel billets and aluminum billets) are fed into the gaps between the rollers through a conveying device. The rotating rollers drive the billets forward by frictional force, while also applying radial extrusion pressure to the billets.

Under the squeezing force, the internal grains of the billet slip and recombine, resulting in plastic deformation - the thickness direction is compressed and thinned, while the length and width directions extend accordingly, gradually approaching the specifications of the target product.

Multi pass rolling and precision control

For products with high precision requirements (such as thin steel plates and precision profiles), a single set of rollers cannot achieve significant deformation, and multiple passes of rolling need to be carried out through a rolling mill production line with multiple sets of rollers connected in series.

The gap between each set of rollers will gradually decrease, and the billet will be extruded one by one to gradually achieve precise dimensions; At the same time, the adjustment mechanism equipped with the rolling mill set (such as hydraulic pressing device) can adjust the roll gap width in real time to ensure rolling accuracy.

Auxiliary system ensures stable operation

During the rolling process, a large amount of heat is generated, and there is friction between the rollers and the billet. Therefore, the roller group will be equipped with a cooling system (water spray or coolant) to reduce the temperature of the rollers, extend their service life, and a lubrication system to reduce frictional resistance and prevent billet from sticking to the rollers.