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Title:
METHOD AND INSTALLATION FOR PRODUCING HOLLOW BLOOM FOR SEAMLESS STEEL PIPE CONTINUOUSLY
Document Type and Number:
Japanese Patent JPS58135708
Kind Code:
A
Abstract:

PURPOSE: To produce a hollow bloom for steamless steel pipe continuously and efficiently with simple stage at a low cost by subjecting the continuously case bloom to bloom piercing in succession to the continuous casting while keeping the bloom at the piercing temp.

CONSTITUTION: The bloom B which is obtained when the molten metal charged from a tundish 1 into a mold 2 solidifies during passing through curtain rolls 3 is kept at the piercing temp. in succession and in this state, the bloom is forced onto a plug 10 by means of thrusting pinch rolls 4 and rolling and piercing rolls 6, whereby a hollow bloom B' is formed. At the point of the time when the bloom B' attains a prescribed length, the bloom is cut with a movable round cutter 7, and the piercing is interrupted temporarily. The plug 10 is pulled down, and the hollow bloom B' is carried to the outside of the system by a carriage 8 for carrying out. The piercing is resumed upon resetting of the carriage 8 and the plug 10. The above-mentioned plug 10 is moved upward and downward and is held by driving of a plug cylinder 13 mounted to a holding frame 9.


Inventors:
SASAKI KENJI
NAKAGAWA KICHIZAEMON
Application Number:
JP1632382A
Publication Date:
August 12, 1983
Filing Date:
February 05, 1982
Export Citation:
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Assignee:
KAWASAKI STEEL CO
International Classes:
B21B19/04; B21B1/46; B21B13/22; B21B23/00; B21B17/08; (IPC1-7): B21B13/22; B21B19/04
Attorney, Agent or Firm:
Akihide Sugimura



 
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