Stamping tool for front ring in flame tube and working method of stamping tool

The invention relates to a stamping tool for a front ring in a flame tube. The stamping tool comprises an upper die plate and a lower die plate. A wedge block is arranged at the lower end of the upper die plate. A locating plate is arranged on the lower die plate. A male die is arranged on the locating plate. A female die is arranged on the outer side of the male die and the bottom of the female die is arranged on the lower die plate. A locating die used for limiting operation is further arranged on the outer side of the female die and fixed to the lower die plate. The inner side face of the locating die is tightly matched with the outer side face of the female die. An annular press plate is fixed to the top face of the female die through bolts. The bottom face, close to the inner ring, of the press plate is attached to the edge of the top face of the male die in a pressed manner. In work, the conic outer wall of the wedge block is attached to and matched with a conic inner hole profile of the male die. By the adoption of the stamping tool for the front ring in the flame tube, a partitioning bulging method is adopted for stamping a part, the male die and the female die are designed in a segmental manner, and the problem that the machined part is likely to be stuck and difficult to take out is solved.