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    METHOD AND EQUIPMENT FOR MANUFACTURING ELECTRIC RESISTANCE WELDED STEEL PIPE
    2.
    发明专利
    METHOD AND EQUIPMENT FOR MANUFACTURING ELECTRIC RESISTANCE WELDED STEEL PIPE 未知

    公开(公告)号：CA2677770C

    公开(公告)日：2015-04-07

    申请号：CA2677770

    申请日：2008-02-08

    Applicant: JFE STEEL CORP

    Inventor： INOUE TOMOHIRO ,  SAKASHITA SHIGETO ,  YUASA DAIJIRO ,  YOKOYAMA HIROYASU ,  KENMOCHI KAZUHITO ,  IIZUKA YUKINORI

    IPC: B23K13/00 ,  B21C37/08 ,  B21C37/083 ,  B21C51/00 ,  B21D19/04 ,  B23K13/08 ,  G01B11/24

    Abstract: A method for manufacturing an electric resistance steel pipe having a good toughness at a welded portion is provided, the method being capable of stably manufacturing an electric resistance welded steel pipe having a desirable toughness at a welded portion although a steel strip serving as a base material has a dimensional variation. Groove shapes 5a and 5b are applied to edges 4a and 4b of an open pipe 4, an edge shape monitor 11 continuously captures images of the edges 4a and 4b immediately before electric resistance welding, and the captured images are input to an arithmetic processing unit 14 for image processing. Thus, a groove height h is measured, an optimum welding electric power is calculated on the basis of the measurement result, and the welding electric power from electric power generating equipment 6 is adjusted. Furthermore, an ultrasonic flaw detector 15 continuously measures an oxide distribution at the welded portion after the electric resistance welding. The optimum welding electric power is calculated on the basis of the measurement result, and the welding electric power from the welding power generating equipment 6 is adjusted.

    METHOD AND EQUIPMENT FOR MANUFACTURING ELECTRIC RESISTANCE WELDED STEEL PIPE
    3.
    发明专利
    METHOD AND EQUIPMENT FOR MANUFACTURING ELECTRIC RESISTANCE WELDED STEEL PIPE 未知

    公开(公告)号：CA2677770A1

    公开(公告)日：2008-08-21

    申请号：CA2677770

    申请日：2008-02-08

    Applicant: JFE STEEL CORP

    Inventor： IIZUKA YUKINORI ,  YOKOYAMA HIROYASU ,  YUASA DAIJIRO ,  SAKASHITA SHIGETO ,  KENMOCHI KAZUHITO ,  INOUE TOMOHIRO

    IPC: B23K13/00 ,  B21C37/08 ,  B21C37/083 ,  B21C51/00 ,  B21D19/04 ,  B23K13/08 ,  G01B11/24

    Abstract: A method for stably manufacturing a seam-welded steel pipe whose welded p ortion has a desired good tenacity even if the dimensions of the steel band used as a base metal vary. Groove shapes (5a, 5b) are given to the edges (4a , 4b) of an open pipe (4). The edges (4a, 4b) are continuously imaged by an edge shape monitor (11) immediately before seam welding. The captured image is inputted into a computing device (14) and subjected to image processing. Thus, the groove depth h is measured. According to the determination result, an optimum welding power is computed, and the welding power from a welding power generating device (6) is adjusted. Further, after seam-welding, the di stribution of oxides in the welded portion is continuously measured by means of an ultrasonic flaw detector (15). According to these measurement results , an optimum welding power is computed, and the welding power from the weldi ng power generating device (6) can be adjusted.

    Ultrasonic flaw detection method, ultrasonic flaw detecting device, and production method for seam-welded pipe
    6.
    发明专利
    Ultrasonic flaw detection method, ultrasonic flaw detecting device, and production method for seam-welded pipe 有权
    超声波检测方法，超声波检测装置和用于焊接管的生产方法

    公开(公告)号：JP2009222408A

    公开(公告)日：2009-10-01

    申请号：JP2008064229

    申请日：2008-03-13

    Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

    Inventor： IIZUKA YUKIMICHI ,  YUASA DAIJIRO ,  SUZUKI MASAHITO

    IPC: G01N29/04

    Abstract: PROBLEM TO BE SOLVED: To provide an ultrasonic flaw detection method and an ultrasonic flaw detection device for seam-welded pipes can ultrasonic-detect flaws with high accuracy in welding seam portion of seam-welded pipes.
    SOLUTION: A welding seam position of a seam-welded pipe 1 is detected, based on an image signal output from an infrared camera 5 to image a welding seam portion 1a of the seam-welded pipe 1; a probe displacement distance is calculated from the detected welding seam position, and the welding seam portion 1a is ultrasonically flaw-detected by moving ultrasonic probes 3a, 3b, in the circumferential direction of the seam-welded pipe 1, based on the calculated displacement distance, in which the welded pipe having flaws at the welding seam portion is used; the welding seam position of the seam-welded pipe is detected from an infrared image obtained by the infrared camera 5; defects are ultrasonically detected by an ultrasonic flaw detector 3; the welding seam position is detected from the defect signal; and the probe displacement distance is compensated based on the difference of the two detected welding seam positions.
    COPYRIGHT: (C)2010,JPO&INPIT

    Abstract translation: 要解决的问题：为了提供一种用于缝焊管的超声波探伤方法和超声波探伤装置，可以在缝焊管的焊缝部分中以高精度超声波检测瑕疵。 解决方案：基于从红外线摄像机5输出的图像信号，检测缝焊管1的焊缝位置，对缝焊管1的焊缝部分1a进行成像; 根据检测到的焊缝位置计算出探针位移距离，并且基于计算出的位移距离，通过在缝焊管1的周向上移动超声波探头3a，3b来超声波检测焊缝部1a 使用在焊缝部分具有缺陷的焊接管; 从由红外线照相机5获得的红外图像检测缝焊管的焊缝位置; 通过超声波探伤仪3超声检测缺陷; 从缺陷信号检测焊缝位置; 并且基于两个检测到的焊缝位置的差异来补偿探针位移距离。 版权所有（C）2010，JPO＆INPIT

    Wall thickness configuration measuring device of pipe, its method, and method for manufacturing pipe
    7.
    发明专利
    Wall thickness configuration measuring device of pipe, its method, and method for manufacturing pipe 有权
    管壁厚度配置测量装置及其制造方法和制造方法

    公开(公告)号：JP2009222701A

    公开(公告)日：2009-10-01

    申请号：JP2008226444

    申请日：2008-09-03

    Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

    Inventor： IIZUKA YUKIMICHI ,  SUZUKI MASAHITO ,  YUASA DAIJIRO

    IPC: G01B17/02 ,  G01B17/06

    Abstract: PROBLEM TO BE SOLVED: To stably and accurately measure the wall thickness configuration of a pipe having a portion of which wall thickness changes largely at not only a bead cut portion but also a seam-welded pipe welded portion including a thickened wall portion. SOLUTION: This wall thickness configuration measuring device of a pipe measures the wall thickness configuration of a seam-welded pipe 2 while running the ultrasonic beam generated by each ultrasonic probe 1-1 to 1-N of a linear array type ultrasonic probe 1 arranged outside the seam-welded pipe 2 in a cross section which crosses the seam-welded pipe 2 in the axial direction. In the linear array type ultrasonic probe 1, the plurality of ultrasonic probes 1-1 to 1-N are array-arranged which generate ultrasonic beams, each of which forms a cylindrical wavefront extending in the cross section and is radiated toward the axis of the seam-welded pipe at least, and whose axial component BMC has intensity larger than a predetermined value. The device includes a wall thickness operation part 8 detecting the seam-welded pipe 2 outer surface echo and seam-welded pipe 2 inner surface echo of the axial component BMC of the scanned ultrasonic beam and measuring the wall thickness configuration of the seam-welded pipe 2. COPYRIGHT: (C)2010,JPO&INPIT

    Abstract translation: 要解决的问题：为了稳定且精确地测量其一部分壁厚不仅在一个胎圈切割部分上发生很大变化的管道的壁厚结构，而且还包括一个包括加厚壁部分的缝焊管焊接部分 。 解决方案：管道的这种壁厚构造测量装置测量缝焊管2的壁厚结构，同时运行由线性阵列型超声波探头的每个超声波探针1-1至1-N产生的超声波束 1，其设置在缝焊管2的外侧，横截面与轴向上与缝焊管2交叉。 在线性阵列型超声波探头1中，多个超声波探头1-1〜1-N被排列成产生超声波束，每个超声波波束形成在横截面中延伸的圆柱形波阵面，并朝向 缝焊管，其轴向分量BMC的强度大于预定值。 该装置包括检测缝焊管2外表面回波和缝焊管2的扫描超声波束的轴向部件BMC的内表面回波的壁厚操作部8，并测量缝焊管的壁厚构造 2.版权所有（C）2010，JPO＆INPIT

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