3-Roll Plate Rolling Machine with Pre-bend

Description

The 3-roll machine works by “pinching” the flat work-piece between two rolls and bending it as it comes in contact with a forming roll. This bends the work-piece into a cylindrical form, where it is welded together to produce a cylinder.

Pre bending is performed on the 3-roll bending machine at the leading and trailing edges of the metal profile, and eventually they seam.

A metal profile cannot physically be bent right to the edge, and thus what remains is referred to as the unbent flat. The minimum flat you can expect is 1.5 times the material thickness and often 2.5 to 3.5 times the material thickness for the heavier metal profile.

It is the pre-bending operation, in attempting to minimize the unbent flat, which takes the most power. That’s why pre-bending ratings are lower than rolling capacities for any given machine.