Pneumatic small U-shaped pipe bender

The invention discloses a pneumatic small U-shaped pipe bender. The pneumatic small U-shaped pipe bender comprises a frame, wherein a bending clamping mechanism, a swing arm, a swing arm power mechanism, a cutting mechanism and a core feeding mechanism are arranged on the frame, wherein the swing arm is hinged to the frame through a swing shaft and is driven by the swing arm power mechanism to swing in a direction close to or far away from the bending clamping mechanism by taking the swing shaft as an axis; the core feeding mechanism is fixed below the swing arm and matched with the bending clamping mechanism to jointly clamp a workpiece to be bent; and the core feeding mechanism comprises an installation base plate, a core feeding sliding plate is arranged on the installation base plate and can move back and forth along an X axis on the installation base plate, a core shaft assembly is arranged at one end of the core feeding sliding plate, a cam and a track groove are arranged at theother end of the core feeding sliding plate, the cam is connected with the core feeding sliding plate through a roller, one end of the roller is fixed to the core feeding sliding plate, and the otherend of the roller penetrates into the track groove. Therefore, the pneumatic small U-shaped pipe bender has the advantages of reinforcement effect, larger core pulling force, lower cost and environmental protection.