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.