Title:
継目無鋼管の圧延制御方法及び製造方法
Document Type and Number:
Japanese Patent JP7184109
Kind Code:
B2
Abstract:
To provide a rolling control method for a seamless steel pipe and a manufacturing method that can manufacture a seamless steel pipe having both good outer diameter dimension accuracy and circularity even when a hole-type roll is abraded without using hole-type rolls adapted to individual products.SOLUTION: A rolling control method for a seamless steel pipe according to the present invention controls a constant diameter rolling step of the seamless steel pipe by controlling a constant diameter rolling machine having N (≥2)stands arranged in a series in the carrying direction of the seamless steel pipe. The method includes a first step of calculating a target outer peripheral length of the seamless steel pipe subjected to constant diameter rolling and an actual outer peripheral length after the constant diameter rolling step of the seamless steel pipe as a front material, a second step of controlling an offset quantity of the N-1th stand in accordance with a differential value between the target outer peripheral length and the actual outer peripheral length, and a third step of controlling an offset quantity of the N-th stand in accordance with a differential value between the target outer diameter of the seamless steel pipe subjected to constant diameter rolling and an actual bottom outer diameter of the seamless steel pipe as the front material.SELECTED DRAWING: Figure 2
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Inventors:
Yusuke Yoshimura
Shunsuke Sasaki
Tatsuro Katsumura
Shunsuke Sasaki
Tatsuro Katsumura
Application Number:
JP2021062616A
Publication Date:
December 06, 2022
Filing Date:
April 01, 2021
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
B21B17/14; B21B37/16; B21B19/10; B21B37/78; B21B38/04; B21C51/00
Domestic Patent References:
| JP2001246405A | ||||
| JP62016809A |
Attorney, Agent or Firm:
Sakai International Patent Office
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