Stepping type rectangular metal corrugated pipe mechanical bulging die and method

The stepping type rectangular metal corrugated pipe mechanical bulging die comprises a lower die base, a pipe blank, a cushion block and a bolt are assembled above the lower die base, the bolt is used for fixing the lower die base and the cushion block, the cushion block is connected with a hydraulic rod, a fixing die piece is arranged on the cushion block and connected with the hydraulic rod, and the hydraulic rod is connected with the pipe blank. An inner mold is assembled above the fixed mold sheet, a mold cone is assembled on the inner mold, the inner side of the inner mold is connected with a spring, and the spring is connected with the fixed mold sheet; according to the rectangular corrugated pipe forming die, rectangular corrugated pipes with different wave numbers are formed through the die, the problems that an existing technological method is high in cost and low in forming quality are solved, and the die has the advantages of being easy and convenient to operate, high in production efficiency and h