What Is CNC Bending?
Computer numerically controlled (CNC) bending is a sheet metal folding process carried out by CNC press brakes.
The press break folds the metal in sheet form, generally by down forming. The press brake has a fixed bottom bed, with V block tooling clamped in place and a top beam with upper V tools, which travels downwards under force.
The fold is formed into the flat sheet when the top tool enters the V block, forcing the metal into the V shape and creating the fold. The angle of the fold is determined by how far the top tool enters the bottom tool.
The finished component can have a combination of different bend lengths and angles, which are pre-programmed from the CNC file.
As well as standard folds, other specialised tooling allows forms and complex shapes to be added.