Pipe material forming structure of lower manifold

The utility model relates to a pipe material forming structure of a lower manifold, which is characterized by comprising an upper die (1) and a lower die (2), wherein the lower end of the upper die (1) is positioned in a die cavity of the lower die (2); a jacking block (3) is also arranged in the die cavity of the lower die (2), and the bottom part of the jacking block (3) is connected with the upper end of a mandril (4). The utility model has the advantages of simple and practical structure, high yield, quick forming speed and low cost; the prior forming materials are rated as 239 and pipe materials are rated as 194 when being adopted, so that the material cost is saved by 40.5 percent. The lower manifold only requires the two dies and four working procedures in stead of seven dies and nine working procedures, thereby greatly reducing the manufacturing cost; and the high-quality rate of the demolding lower manifold is raised from 97.8 percent to 99.8 percent.