Pipe inflatable forming sealing structure and bulging process

The invention provides a pipe inflatable forming sealing structure which comprises a base, an upper die, a lower die, an upper die driving block, a sliding block and a sealing plug, a pipe workpiece is placed between the upper die and the lower die, the upper die driving block moves downwards to push the sliding block to slide rightwards, the sliding block is arranged on the base in a sliding mode, and the right end of the sliding block is connected with the left end of the sealing plug. A wedge part is arranged at the right end of each sealing plug and matched with the inner wall of the pipe workpiece, an air inlet pipeline used for communicating an inner cavity of the pipe workpiece with high-pressure air is arranged in each sealing plug, and the sealing plugs are arranged in pairs and matched with the two ends of the pipe workpiece. A common wedge is adopted for driving, the development and manufacturing cost and the daily maintenance cost are reduced, the mold development period is shortened, and the mold