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The calendering of sheet metal is a particular metal working process that consists in the deformation of a surface in order to obtain metal ” foils “.

With the calendering of sheet metal it is possible to obtain metal products of conical or cylindrical shape

The calendering process is nothing more than a bending process to obtain a curvature of metals. The process no longer takes place on a well-defined line but on an entire surface, while maintaining the perpendicularity of the rollers with respect to the movement of the sheet to be calendered. The machine used is the sheet metal calender.

The process

The calendering of sheet metal consists of passing metal foils between three offset rollers parallel to each other, through a strong pressure of the upper roller with the two underneath the sheet metal is deformed/snervated. The constant passage at a certain speed between these rollers of the sheet metal gives a constant deformation which results in a more or less accentuated curvature of the sheet metal itself.

The process is repeated until the two ends of the foil are matched to create a tube.

Afterwards, the flaps are welded in stretches to maintain the deformation obtained.

The virola or tube formed is removed from the rollers to be definitively welded and then put back into the calender for the calibration process, obtaining a regular cylinder.

During the calendering of sheet metal it is also possible to use suitably shaped figures, to obtain truncated cones or sectors of tube.

Depending on the size of the rollers of the calender itself and the pressures involved during deformation, it is also possible to calender sheet metal 3000mm wide with a thickness of 110mm.


The complexity of the process means that sheet metal calendering can only be carried out by companies with great expertise. All the customer has to do is to indicate which object is to generate the available metal.

The correct setting of the rollers to obtain the right curvature is the responsibility of a team of technicians who also use numerically controlled machines, with more than millimetric precision, to determine the right distance between the various elements.

Quality first

Relying on a competent company like Tecnos means not only having a guarantee of the quality of the work carried out, but also obtaining very fast processing times and maximum professionalism. But that’s not all: Tecnos also offers the possibility of calendering thick sheets up to thicknesses of 110mm with a width of 3000mm.

Tecnos’ work thus qualifies as medium-heavy metal carpentry.In addition to this process, Tecnos also carries out sandblasting, crimping and welding.