W12 series has the prebending function of the plate end, which can feed the metal sheet at one time, and complete the prebending of the plate end and the rolling of the workpiece without turning; The work roller on the machine is the main driving roller, the lifting of the lower roller and the rollers on both sides are hydraulic transmission, the lifting displacement is controlled by the computer, and the automatic leveling is displayed on the screen. The tipping and reset of the overturned bearing body are hydraulic transmission, and the tail of the upper roller is equipped with a balancing mechanism, which can facilitate the unloading of the rolled workpiece and the simplified parts; It can be operated at any time, and the machine is equipped with a safety interlock device. The machine has high technical level, full function, high precision and easy operation.