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Patent Searching and Data


Title:
METHOD OF PIERCING ROUND CAST STEEL
Document Type and Number:
Japanese Patent JP2001009508
Kind Code:
A
Abstract:

To provide a method of piercing a round cast steel which can reduce thickness nonuniformity even by using roller shoes for multiple sizes when the round cast steel is pierced with a piercer rolling mill to make it into a hollow pipe for manufacturing a seamless steel pipe.

In the method of piercing a round cast steel to manufacture a hollow pipe by surrounding the round cast steel 2 with a pair each of inclined rolls 13 and roller shoes 14 of a piercing rolling mill, and by advancing and rolling the round cast steel 2 while pressing the plug against the center shaft of the round cast steel 2, the spacing in radial direction between the inclined roll 3 and the roller shoe 14 on the outer side from the gouge of the inclined rolls 13 in the cross-sectional view is set at 20 mm or less, so as to perform rolling.


Inventors:
NAKABASHI SATORU
MIYAZAWA TAKESHI
Application Number:
JP18318299A
Publication Date:
January 16, 2001
Filing Date:
June 29, 1999
Export Citation:
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Assignee:
KAWASAKI STEEL CO
International Classes:
B21B19/04; (IPC1-7): B21B19/04
Attorney, Agent or Firm:
Yoshio Kosugi (1 person outside)