The characteristics of the mechanical three-roller asymmetric bending machine W11 series are mainly reflected in the fact that the structure of the machine is a three-roller asymmetric type, the upper roller is the main transmission, and the lower roller is vertically moved to clamp the plate and pass the lower roller gear. Engaged with the upper roller gear, at the same time as the main drive; the side roller for tilting and lifting movement, with the dual function of pre-bending and rolling. Compact structure and easy operation and maintenance.