Title:
ROUNDNESS PREDICTION METHOD FOR STEEL PIPE, ROUNDNESS CONTROL METHOD, MANUFACTURING METHOD, METHOD FOR GENERATING ROUNDNESS PREDICTION MODEL, AND ROUNDNESS PREDICTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/215459
Kind Code:
A1
Abstract:
The roundness prediction method for steel pipe according to the present invention predicts, in steel pipe manufacturing steps including a U-press step for forming a steel plate into a formed body having a U-shaped cross section by means of a U-press tool, an O-press step for forming the formed body having a U-shaped cross section into an open pipe, and a pipe expansion step for carrying out forming by means of pipe expansion on the steel pipe obtained by joining ends of the open pipe to each other in the width direction, the roundness of the steel pipe after the pipe expansion step, the steel pipe roundness prediction method including a step for predicting roundness information about the steel pipe after the pipe expansion step by using a roundness prediction model, which is learned by machine learning in which one or more operation parameters selected from operation parameters of the U-press step and one or more operation parameters selected from operation parameters of the O-press step are included as input data, and the roundness information about the steel pipe after the pipe expansion step is set as output data.
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Inventors:
HORIE MASAYUKI (JP)
HINATA KOSUKE (JP)
ISHIGURO MOTOKI (JP)
YAMAZAKI RYOSUKE (JP)
HINATA KOSUKE (JP)
ISHIGURO MOTOKI (JP)
YAMAZAKI RYOSUKE (JP)
Application Number:
PCT/JP2022/011610
Publication Date:
October 13, 2022
Filing Date:
March 15, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B21C37/08; B21D5/01; B21D39/20; G05B19/418
Domestic Patent References:
| WO2022009575A1 | 2022-01-13 | |||
| WO2022009576A1 | 2022-01-13 |
Foreign References:
| JP2012137813A | 2012-07-19 | |||
| JP2002346629A | 2002-12-03 | |||
| JP2004141936A | 2004-05-20 | |||
| JP6519896B1 | 2019-05-29 | |||
| JPS5550916A | 1980-04-14 | |||
| JPH0471737A | 1992-03-06 | |||
| JP2004141936A | 2004-05-20 |
Other References:
KOICHIRO NISHIKAWA: "IMPROVEMENT OF SIZE AND GAGE CONTROL IN STEEL PIPE.", TETSU TO HAGANE: JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, IRON AND STEEL INSTITUTE OF JAPAN. TOKYO., JP, vol. 79., no. 03., 1 January 1993 (1993-01-01), JP , pages 250 - 262., XP000367843, ISSN: 0021-1575
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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