Title:
METHOD AND DEVICE FOR MANUFACTURING INSIDE GROOVED SEAMLESS STEEL TUBE AND PLUG
Document Type and Number:
Japanese Patent JPH04266405
Kind Code:
A
Abstract:
PURPOSE: To enable manufacture of an inside grooved steel tube provided with a reasonable shape though the thickness is large.
CONSTITUTION: The manufacturing device of an inside grooved seamless steel tube having a pair of rolling rolls 21 obliquely arranged with a fixed lead angle and a plug 22 which is arranged in the center of a rolled zone formed by each rolling roll 21 and provided with an annular projection 23 on the outer periphery.
Inventors:
KAWATE TAKAO
Application Number:
JP4551791A
Publication Date:
September 22, 1992
Filing Date:
February 20, 1991
Export Citation:
Assignee:
KAWASAKI STEEL CO
International Classes:
B21B19/10; B21B25/00; E02D5/30; (IPC1-7): B21B19/10; B21B25/00; E02D5/30
Attorney, Agent or Firm:
Shuji Shiokawa