Title:
鋼管の生産管理方法
Document Type and Number:
Japanese Patent JP5196082
Kind Code:
B1
Abstract:
There is provided a production management method for steel tubes and pipes produced through a plurality of production processes, including:
a step of machining a matrix code, which encodes tube or pipe information, in a tube or pipe end by a laser beam so that the central angle of width of the matrix code in a circumferential direction of the tube or pipe is 30° or smaller; and
a step of reading the matrix code automatically by using a linear sensor type camera, wherein
through reading the matrix code, the production history is managed by identifying and recording the production information and quality information corresponding to each steel tube or pipe for each tube or pipe number, and
the tube or pipe information is retrievable as necessary.
Inventors:
Shigetoshi Hyodo
Dewguchi Satoshi
Kazuto Kubota
Dewguchi Satoshi
Kazuto Kubota
Application Number:
JP2012536623A
Publication Date:
May 15, 2013
Filing Date:
August 10, 2012
Export Citation:
Assignee:
Nippon Steel & Sumitomo Metal Corporation
International Classes:
B21C51/00; B21B38/00; B23K26/00; G05B19/418; G06K1/12; G06K7/00; G06K17/00; G06K19/06
Domestic Patent References:
| JPH0684004A | 1994-03-25 | |||
| JP2004157812A | 2004-06-03 | |||
| JPH08339434A | 1996-12-24 | |||
| JP2002269490A | 2002-09-20 | |||
| JPH05223479A | 1993-08-31 | |||
| JP2003056755A | 2003-02-26 | |||
| JP2006035343A | 2006-02-09 |
Foreign References:
| WO2008015871A1 | 2008-02-07 |
Attorney, Agent or Firm:
Mikiji Sugioka
Chihara
Chihara