公开(公告)号：EP3045255A4

公开(公告)日：2017-05-17

申请号：EP14843489

申请日：2014-08-29

Applicant: JFE STEEL CORP

Inventor： KODAMA TOSHIFUMI ,  SAKASHITA SHIGETO

IPC: B23K26/00 ,  B23K26/06 ,  B23K26/21 ,  B23K31/12 ,  B23K103/04

CPC classification number: G06T7/0008 ,  B23K26/032 ,  B23K26/262 ,  B23K31/125 ,  G06T2207/30164

Abstract: An object is to provide a laser beam welding diagnosis apparatus and a laser beam welding diagnosis method, which enable diagnosis of a laser beam welding state by detection of whether or not a penetrated welding state is maintained in a laser beam welded portion. A configuration therefor is a laser beam welding diagnosis apparatus that performs diagnosis of a laser beam welded portion 5 of a welded pipe welded by butting both edges of a steel strip 1 against each other and irradiating a butted portion with a laser beam 7, and the configuration includes an imaging unit 8, which continuously captures images of a laser beam welding penetration side of the laser beam welded portion 5, a feature amount calculating unit 11, which calculates, from an image captured by the imaging unit 8, a feature amount of a jetted portion accompanying laser beam welding penetration, a welding diagnosis unit 12, which determines that a welding defect in the laser beam welded portion 5 has occurred when values of the feature amounts in a predetermined area of the images continuously obtained become equal to or less than a predetermined value for a predetermined duration or longer, and a display unit 13, which displays and outputs a welding quality state including the occurrence of the welding defect.

Abstract translation: 本发明的目的是提供一种激光焊接诊断装置和激光焊接诊断方法，其能够通过检测激光焊接部分中是否保持贯穿焊接状态来诊断激光焊接状态。 其结构是激光焊接诊断装置，该激光焊接诊断装置对通过将钢带1的两个边缘相互对接并用激光束7照射对接部分而焊接的焊接管的激光焊接部分5进行诊断， 配置包括连续捕获激光束焊接部分5的激光束焊接穿透侧的图像的成像单元8，特征量计算单元11，其根据由成像单元8捕获的图像来计算特征量 伴随着激光熔接穿透的喷射部分;焊接诊断单元12，其在连续获得的图像的预定区域中的特征量的值变得等于或小于等于或小于预定值时，确定激光束焊接部分5中的焊接缺陷已经发生 预定时间以上的预定值以及显示单元13，该显示单元13显示和输出包括该预定值的焊接质量状态 发生焊接缺陷。

公开(公告)号：EP1125649A4

公开(公告)日：2005-04-27

申请号：EP00931583

申请日：2000-05-26

Applicant: JFE STEEL CORP

Inventor： KODAMA TOSHIFUMI ,  TORAO AKIRA

IPC: B21B38/00 ,  B21B33/00

CPC classification number: B21B38/008

Abstract: The invention provides a method of quickly and accurately detecting the chattering of a rolling mill during cold rolling. The presence of chattering is determined using a plurality of acoustic parameters derived from sounds measured near a rolling mill during cold rolling. The acoustic parameters include the sound intensities of the frequency band characteristic of the chattering and the Nth overtone frequency band, the peak frequency of the sound frequency component distribution, the resonance coefficient, and the peak intensity. The same parameter may be measured at different instants, processed and used as different parameters.

公开(公告)号：EP2660558A4

公开(公告)日：2017-01-25

申请号：EP11852692

申请日：2011-12-19

Applicant: JFE STEEL CORP

Inventor： YAMAHIRA NAOSHI ,  KODAMA TOSHIFUMI

IPC: G01B11/25 ,  C10B45/00 ,  F27D21/00 ,  G01N21/954

CPC classification number: G01B11/24 ,  C10B45/00 ,  F27D21/0021 ,  G01B11/2518 ,  G01N21/954

Abstract: Laser light and self-emitting light of an oven wall for measuring an irregular shape of an oven wall surface are simultaneously obtained while allowing the laser light and the self-emitting light to not interfere with each other and a measurable range in a direction perpendicular to the oven wall surface and an irradiation range of the laser light to be increased. Included are: a slit laser light source 4 that is arranged in a thermally-insulated protection box 3 having a slit-like window 2 and emits slit-like laser light; a laser light mirror 5 that reflects the laser light and irradiates the oven wall surface with the laser light via the window 2; an imaging mirror 6 that reflects reflected light from the oven wall surface due to irradiation of the laser light and self-emitting light emitted from the oven wall surface, which enter the thermally-insulated protection box 3 via the window 2; and an imaging device 8 that images via an optical filter 7 the self-emitting light and the reflected light that are reflected from the imaging mirror 6.

公开(公告)号：EP2792447A4

公开(公告)日：2016-05-04

申请号：EP12857094

申请日：2012-12-07

Applicant: JFE STEEL CORP

Inventor： KODAMA TOSHIFUMI ,  YANO KOJI ,  SUZUKI MASAHITO

IPC: B23K26/20 ,  B23K26/00 ,  G01B11/00

CPC classification number: B23K26/032 ,  B23K26/042 ,  B23K26/044 ,  B23K26/262 ,  B23K2201/06 ,  B23K2203/04 ,  G06T7/269 ,  G06T2207/10016 ,  G06T2207/10048 ,  G06T2207/30136 ,  G06T2207/30152

Abstract: A welding position detecting apparatus for laser beam welding according to the present invention includes an imaging device (5) that captures, at a predetermined time interval, images of an irradiated portion (4) of a welded steel pipe (1) irradiated with a welding laser beam (3), and a surrounding area thereof, of the welding material; an image processing device (6) that identifies a position of the irradiated portion (4) irradiated with the welding laser beam (3) by performing image processing calculating, from two or more images acquired by the imaging device (5), a direction and an amount of parallel movement of points in the images; and a display device (7) that displays the position of the irradiated portion irradiated with the welding laser beam, the position being identified by the image processing device (6).

公开(公告)号：EP3315952A4

公开(公告)日：2018-06-13

申请号：EP16814396

申请日：2016-06-22

Applicant: JFE STEEL CORP

Inventor： ONO HIROAKI ,  TATE MASAMI ,  OSHIGE TAKAHIKO ,  KODAMA TOSHIFUMI ,  KOSHIHARA TAKAHIRO ,  OGAWA AKIHIRO ,  IIZUKA YUKINORI

IPC: G01N21/892 ,  G01N21/88 ,  G01N21/89 ,  G01N21/952

CPC classification number: G01N21/892 ,  G01N21/8806 ,  G01N21/952 ,  G01N2021/8816 ,  G01N2021/8918 ,  G01N2021/8924

Abstract: A surface defect detection method according to the present invention is a method of optically detecting a surface defect of a steel product, and includes an irradiating step of irradiating illumination lights from different directions to an identical inspection target portion by using at least two distinguishable light sources; and a detecting step of acquiring images by reflection lights of the respective illumination lights and detecting a surface defect in the inspection target portion by performing difference processing between the acquired images. An incident angle of the illumination lights of the respective light sources are within a range of 60° to 82.5° relative to the inspection target portion.

公开(公告)号：EP1500904A4

公开(公告)日：2008-08-27

申请号：EP03719173

申请日：2003-04-23

Applicant: JFE STEEL CORP

Inventor： KODAMA TOSHIFUMI ,  SUZUKI TAIRA ,  TORAO AKIRA ,  TAKEMURA YASUMASA ,  OKABE TAKATOSHI

IPC: B21C37/08 ,  B21C51/00 ,  B23K11/25 ,  G01B11/24

CPC classification number: B23K11/252 ,  B21C37/0811 ,  B21C51/00 ,  G01B11/24

Abstract: Method and instrument for measuring the bead cutting shape of an electric welded tube accurately without being affected by the difference in the luminance level of an optical cut image between a cut part and a uncut part. An optical cut image is displayed while being superposed on a thin-line image obtained by processing the optical cut image through a specified image processing means. Profile of an electric welded tube is approximated by a quadratic function and a region including the coordinate at the apex of a bead is specified as the bead. Shape data of the tube surface at a part corresponding to the bead part is then determined from the boundary at the left and right ends of the bead part preset for the shape data of the tube surface including the bead part, and the apex position of the bead part calculated separate. Subsequently, the width, height and rising angle of the bead, and the level difference at the left and right boundary of the bead part and the bare tube part are calculated, respectively, based on the approximate function of the left and right bead shapes and the approximate function of the bare tube shape.

公开(公告)号：EP3118612A4

公开(公告)日：2017-09-20

申请号：EP15761351

申请日：2015-03-03

Applicant: JFE STEEL CORP

Inventor： IIZUKA YUKINORI ,  ONO HIROAKI ,  KODAMA TOSHIFUMI ,  OGAWA AKIHIRO

IPC: G01N25/72 ,  G01J5/48

CPC classification number: G01N21/8806 ,  G01J5/48 ,  G01N21/359 ,  G01N21/93 ,  G01N21/95 ,  G01N25/72

Abstract: A control device 12 acquires a self-luminous image of a steel pipe captured when the steel pipe is hot, corrects the self-luminous image by uniformizing luminance variation in the circumferential direction of the self-luminous image, and detects a surface defect based on the corrected self-luminous image. The self-luminous image is preferably captured in a position behind a reducer. The diameter reduction rate applied by the reducer for the steel pipe is preferably equal to or greater than 110%. The luminance variation in the circumferential direction of the self-luminous image is uniformized by using a luminance distribution in the circumferential direction where the luminance in the longitudinal direction of the steel pipe is averaged. The luminance variation in the circumferential direction of the self-luminous image may be uniformized by using a difference in the luminance between a plurality of self-luminous images captured with the position in the longitudinal direction of the steel pipe changed.

Abstract translation: 控制装置12取得钢管热时拍摄的钢管的自发光图像，通过使自发光图像的周向的亮度变化均匀化来修正自发光图像，基于 校正后的自发光图像。 自发光图像优选被捕获在减速器后面的位置。 减径机对钢管施加的缩径率优选为110％以上。 通过使用钢管长度方向的亮度平均后的圆周方向的亮度分布，使自发光图像的周向亮度变化均匀化。 通过使用在钢管的长度方向上的位置改变的情况下拍摄的多个自发光图像之间的亮度差异，可以使自发光图像在圆周方向上的亮度变化均匀。

公开(公告)号：EP3088874A4

公开(公告)日：2017-05-17

申请号：EP14873854

申请日：2014-12-24

Applicant: JFE STEEL CORP

Inventor： ONO HIROAKI ,  KODAMA TOSHIFUMI ,  KOSHIHARA TAKAHIRO ,  OGAWA AKIHIRO ,  IIZUKA YUKINORI

IPC: G01N21/892 ,  G01B11/30 ,  G01N21/88 ,  G01N21/952

CPC classification number: G01N21/8851 ,  G01B11/245 ,  G01N21/892 ,  G01N21/952 ,  G01N2021/8822 ,  G01N2021/8887 ,  G01N2201/063 ,  G06K9/4604 ,  G06K9/6267 ,  G06T7/0004 ,  G06T7/70 ,  G06T2207/20224 ,  G06T2207/30164 ,  H04N7/01

Abstract: A surface defect detecting method is a surface defect detecting method of optically detecting a surface defect of a steel pipe P, and includes an irradiation step of irradiating the same examination target part with illumination light beams L from different directions by using two distinguishable light sources 2a and 2b, and a detection step of obtaining images by reflected light beams of the respective illumination light beams L and detecting a surface defect in the examination target part by executing subtraction processing between the obtained images. Thereby, the surface defect is able to be accurately distinguished from scale or a harmless pattern.

Abstract translation: 表面缺陷检测方法是光学检测钢管P的表面缺陷的表面缺陷检测方法，并且包括照射步骤，该照射步骤通过使用两个可区分的光源2a从不同方向照射照明光束L给相同的检查目标部分 以及检测步骤，通过各个照明光束L的反射光束获得图像，并且通过在所获得的图像之间执行减法处理来检测检查目标部分中的表面缺陷。 由此，表面缺陷能够被精确地与刻度或无害模式区分开来。

公开(公告)号：EP3012331A4

公开(公告)日：2016-06-01

申请号：EP14814308

申请日：2014-06-13

Applicant: JFE STEEL CORP

Inventor： YAMAHIRA NAOSHI ,  KODAMA TOSHIFUMI ,  MORIKAWA YASUYUKI ,  TANAKA YUSUKE

IPC: C21B7/24 ,  C21B5/00 ,  C21B7/16 ,  C21C5/46 ,  F27D19/00 ,  F27D21/00

CPC classification number: C21C5/4673 ,  C21B7/163 ,  C21C5/48 ,  F27D19/00 ,  F27D2019/0078

Abstract: Provided are a method for detecting an abnormality at a blast furnace with which the abnormality causing clogging of a tuyere can be detected at an early stage and a method for operating a blast furnace using the method for detecting the abnormality. A camera 11 is disposed near a tuyere 2 of a blast furnace 1 and an image of a raceway unit is captured through an in-furnace monitor window 6 disposed at the tuyere 2. Then, an abnormality causing clogging of the tuyere unit is determined to have occurred when the brightness of the captured image captured by the camera 11 is determined to be lower than or equal to a threshold S and the rate of change in brightness is determined to be lower than or equal to a threshold R (the rate of decrease in brightness is determined to be lower than or equal to a threshold).

公开(公告)号：EP2322312A4

公开(公告)日：2015-05-27

申请号：EP09770280

申请日：2009-06-22

Applicant: JFE STEEL CORP

Inventor： YANO KOJI ,  OI KENJI ,  SUZUKI MASAHITO ,  KODAMA TOSHIFUMI ,  SAKASHITA SHIGETO

IPC: B23K26/26 ,  B23K26/03 ,  B23K101/06

CPC classification number: B23K26/1429 ,  B23K26/03 ,  B23K26/032 ,  B23K26/262 ,  B23K2201/06 ,  B23K2201/10 ,  B23K2203/04

Abstract: There is provided a method for manufacturing a laser welded steel pipe in which the status of laser welding is accurately assessed, and the assessment is used to modify welding conditions, so that laser welded steel pipes can be manufactured at a high yield rate and in a stable manner. More specifically, irradiation point(s) of laser beam(s), with which the longitudinal edges are irradiated from the side of the outer surface, are monitored from the side of the inner surface of an open pipe, and then conditions of welding with the laser beam(s) are assessed to be kept unchanged if any keyhole is found penetrating out of the inner surface of the open pipe, or modified if no keyhole is found penetrating out of the inner surface of the open pipe, so that welding can be performed with any keyhole penetrating from the outer surface to the inner surface of the open pipe captured at any irradiation point of the laser beam(s) .