Device and method for strengthening thin-walled straight pipe
A device for strengthening a straight pipe, including a first positioning mold, a second positioning mold, a split mold, a rounding mold, a first cavity and a second cavity. A method for strengthening a straight pipe is further provided. The split mold is adjusted to position the pipe. The pipe is inserted into the first and second positioning molds. First and second sealing rings are arranged in an inner cavity of the pipe. Hydraulic oil is injected into the first cavity to expand the pipe to perform an expanding deformation. When the hydraulic oil is unloaded, the split mold moves towards an axis of the first positioning mold to perform a reducing deformation. After the expanding and reducing deformations, the pipe is transported into the rounding mold, and hydraulic oil is injected into the second cavity to expand the pipe to perform the rounding.
YANSHAN UNIVERSITY
C C B B B B
C21D C21D B21D B21D B21D B21D
inventional inventional inventional additional additional inventional
Chunxiang Weipeng Junting Yongfei Lili
Zhang Liu Luo Gu Zhang