Reducing pipe expansion drawing forming device

The utility model relates to metal pipe machining, in particular to a reducing pipe expansion drawing forming device which comprises a frame, a hydraulic station, a pushing baffle plate and a pushing seat, wherein the pushing baffle plate is fixed at one end of the frame, and the pushing seat is fixed onto the pushing baffle plate. One end of a pipe is fixed into the pushing seat, the other end of the frame is provided with a movable mould base, the movable mould base is pushed by a pipe sleeve to move along guide posts towards the tip of the pipe, the guide posts are fixed on two sides of the frame, one end of the pipe sleeve is connected with the movable mould base, and the other end of the pipe sleeve is fixed to the tip of a piston rod of a hydraulic cylinder controlled by the hydraulic station. The pipe is necked down by a necking pushing head mounted on the movable mould base, and the pipe is drawn by clamping the necked position of the pipe through a drawing chuck mounted on the movable mould base. Owi