Bending radius adjustable pipe bending fixture

The invention discloses a bending radius adjustable pipe bending fixture. The bending radius adjustable pipe bending fixture comprises a pipe bending fixing wheel and pipe bending clamping wheels. Thepipe bending fixing wheel is composed of a base plate, expansion blocks and a spiral pressing disk. The base plate is arranged on a rotary shaft of a pipe bending machine. The upper end face of the base plate is provided with a plurality of strip-shaped expansion block mounting grooves distributed radially. The movable expansion blocks are arranged in the expansion block mounting grooves. The spiral pressing disk concentric with the base plate is arranged above the base plate. The lower end face of the spiral pressing disk is provided with a spiral annular clamping groove. The upper end faceof the base plate is further provided with a fixed jaw. The bending radius adjustable pipe bending fixture is large in adjusting range, suitable for different pipe bending radii and fast and convenient to adjust, saves physica