Seamless rolled rings

Seamless rolling is a subcategory of forging. The first step is to be compared to the free forge and allows you to obtain a wheel with a central hole. It is by turning this wheel while hot by pressing it between two rollers that we will reduce the cross-section and increase the diameter in order to obtain a forged crown. Two tapered rollers press the faces to obtain a rectangular profile, a shape that is contrasted with special profiles such as those used to make flanges.

The primary advantage of circular rolling is to obtain seamless coils with dimensional tolerances that are impossible to obtain in free forging by boring and without welding. Faster and more automatic than free forging, circular rolling makes it possible to obtain parts of revolution such as crowns, ferrules or cylinders in a wide range of materials.

The term rolling is also known in the steel industry for the manufacture of long products such as plates and bars which are hot-drawn by successive passes between two rollers which reduce the cross-section of the material used. In this process, we find the two rollers again, but this time without going back and forth because we are working continuously on a cylindrical part.