An online hot-expending machine for large-diameter steel pipe
SUN Nian-guang
WEI Xue-rong
CAO Xi-yan
YAN Shan-wu
Abstract：Heating-while-expending steel pipe is required in the production process of large-diameter steel pipe, but there are some shortcoming , such as high heating power , poor expending efficiency , and coarse grain.Hot-expending machine for Φ1 300 mm large-diameter steel pipe was developed by shaanxi doron tech-nology development Co., Ltd., it is high production efficiency , energy conservation and short process this expen-der.Centering restraint device with four-jaw independent chuck was used in this expender , which decreased de-formation of end pipe and restrained circumferential deformation .The device does guarantee cylindricality .
Keywords：large-diameter steel pipepipe expendershort process
Publication Date：2015-05-02
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 9-11 )