External cold pressing machining device for hardware pipe fitting

The invention relates to the technical field of hardware machining equipment, and discloses an external cold pressing machining device for a hardware pipe fitting. The external cold pressing machining device comprises an auxiliary seat, a propelling wheel is arranged on the inner side of the left portion of the auxiliary seat, a positioning block is arranged on the right side of the propelling wheel, a plurality of arc-shaped pistons are arranged on the outer side of the positioning block, and air compression cavities are correspondingly formed in the left sides of the arc-shaped pistons. A pressure pipe is fixedly connected to the outer side of the air compression cavity, a fixing seat is movably connected to the right end of the pressure pipe, a plurality of power cavities are formed in the fixing seat, and positioning claws are arranged on the inner walls, close to the outermost sides, of the power cavities. According to the external cold pressing machining device for the hardware pipe fitting, action colu