Wind towers door frames are oval steel rings made for reinforcing the entry hole necessary for an operator or technician to access the towers. The door frames are generally made of steel plates 400-500mm wide with thicknesses that range from 50mm up to 100mm to comply with the design norms.
The fabrication of oval shaped steel frames with rather small radii, requires a machine capable of bending these thicknesses down to radii of around 250-400mm.
FACCIN has designed a special 4-rolls linear machine for door frames, the 4HEL/DF Series, half meter long, with extra bending force and torque to increase automation and precision and capable of rolling these complex shapes with minimum cycle time and the shortest pre-bending possible.
The 4HEL/DF comes with the latest generation of Siemens CNC, the PGS-Ultra, that allows automatic calculation of the bending cycle as well as a perfect interpolation of the axis.