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1. 发明专利

JPS60144603A CONTINUOUS MEASURING METHOD OF COATING THICKNESS OF COATED METALLIC TUBE 失效
公开(公告)号：JPS60144603A
公开(公告)日：1985-07-31
申请号：JP115984
申请日：1984-01-07
申请人： NIPPON STEEL CORP
发明人： KAWAMURA KOUJI , HIRAMOTO KIYOHARU
IPC分类号： G01B7/06 , G01B7/00
摘要： PURPOSE:To take a measurement accurately and continuously by fitting a couple of eddy current detection coils at symmetric positions of the support shaft of a contact roller which rotates in contact with a film. CONSTITUTION:The couple of detection coils 4a and 4b are fitted to the support shaft 6 so that their centers are at distance l1 from the center of the contact roller 3 in the tube axis direction and their reverse surfaces face the reverse surfce of the contact roller 3 at distance h1. When detection parts and the tube surface slant relatively, the distances between the detection coils 4a and 4b and steel tube surface are g1a and g1b and apparent coating thicknesses measured by detectors 4a and 4b are different values ta and tb. Consequently, the coating thickness (t) at a contact point (p) is obtained from an equation. Namely, the mean value of signal outputs of the two detection coils is used to correct variation in measured value automatically, thereby measuring the coating thickness (t) accurately.

2. 发明专利

JPS6244658A UST PROBE 失效
公开(公告)号：JPS6244658A
公开(公告)日：1987-02-26
申请号：JP18386285
申请日：1985-08-23
申请人： NIPPON STEEL CORP
发明人： HIRAMOTO KIYOHARU , WATANABE SEIICHI , ITO KAZUNORI
IPC分类号： G01N29/24 , G01N29/04
摘要： PURPOSE:To detect a flaw at a high S/N by combining two UST probes together as one set, arranging the probes at positions symmetrical in a direction where an acoustic wave is transmitted and received, and providing a probe position shifting mechanism which put the two probes in symmetrical motion around a fulcrum about a segment. CONSTITUTION:A test sample 2' is formed by treating the center part of a copper bar 6 with an insulator 4 without treating both ends and making a flaw 1' in one untreated end with a chisel. When the flaw of this sample 2' is detected by a one-probe method, a large noise signal is generated at the position of an insulated part in addition to a signal corresponding to the chisel flaw 1' and a signal corresponding to a copper bar end part 6'. For the purpose, a probe 5 for excitation and a probe 5' for reception are provided and when the flaw is detected by a two-probe method, almost no noise signal appears at a position corresponding to the insulated part, thereby obtaining a sufficient S/N flaw signal even if the flaw to be detected is present in the insulated part.

3. 发明专利

JPS59120952A FLAW DETECTOR FOR COPYING WELDED STEEL PIPE 失效
公开(公告)号：JPS59120952A
公开(公告)日：1984-07-12
申请号：JP22738482
申请日：1982-12-28
申请人： TOKYO KEIKI KK , NIPPON STEEL CORP
发明人： YAGI TAKESHI , KAWAMURA KOUJI , KIMIYA YASUO , HIRAMOTO KIYOHARU , MIZUNO TAKEO , SHIMADA HIDEYUKI
IPC分类号： B23K31/00 , G01N29/04 , G01N29/11
摘要： PURPOSE:To improve the reliability and to make the device small-sized, simple, and low-cost, by propagating ultrasonic pulses along a weld line and providing a weld position detecting device on a common base coaxially. CONSTITUTION:A transmitting oscillator 3 and a receiving oscillator 4 are provided along the weld line of a weld 2 so as to face each other, and the ultrasonic beam radiated from the transmitting oscillator 3 is made incident to a welded steel pipe 1 at a prescribed angle and is propagated along the weld line while being reflected prescribed-number of times repeatedly on inside and outside tube walls 1A and 1B and is received by the receiving oscillator 4. Since the variance of the level of transmission pulses in the weld reaches about >=20dB which is >=10 times as high as that in a base material part 8 where there are no variance of thickness, defects, etc., the position of the weld is detected accurately. Since a weld position detecting device 20 is provided on a common base 50, displacement parallel with the axis of an electric welded steel pipe 1 corresponds to devices 20 and 40 in 1:1, and copying control of a flaw detector 40 is performed directly with a weld position signal, which the weld position detecting device 20 detects, for displacement around the axis of the pipe.

4. 发明专利

JPS59118275A System for detecting position of weld zone in welded steel pipe 失效
标题翻译：用于检测焊接钢管中焊接位置的系统
公开(公告)号：JPS59118275A
公开(公告)日：1984-07-07
申请号：JP22552382
申请日：1982-12-22
申请人： Nippon Steel Corp , Tokyo Keiki Co Ltd
发明人： YAGI TAKESHI , KAWAMURA KOUJI , KIMIYA YASUO , HIRAMOTO KIYOHARU , MIZUNO TAKEO , SHIMADA HIDEYUKI
IPC分类号： B23K9/12 , B23K9/025 , B23K9/127
CPC分类号： B23K9/1276
摘要： PURPOSE:To detect easily and exactly the position of a weld zone with good reproducibility by making an ultrasonic pulse incident from an oscillator for transmission to a welding steel pipe, propagating the pulse along the weld line and detecting the change in the level of the transmitted pulse with an oscillator for reception. CONSTITUTION:A weld zone 2 of an electric welded steel pipe 1 subjected to high frequency resistance welding forms a linear weld line along the axial direction of the pipe and is subjected to an annealing treatment and bead cutting after welding. An oscillator set 5 rotating in a circumferential direction relatively with the pipe 1 is provided on the outside circumference of the pipe, and an ultrasonic pulse for scanning is emitted from an oscillator 5 for transmission of said set and is made incident and propagated in parallel with the weld line. Said pulse repeats reflection on the inside and outside pipe wall surfaces 1A, 1B of the pipe 1, and generates a large change in the pulse level in the weld zone 2 where the parallelism between the pipe walls is disturbed. Such pulse is detected with an oscillator 4 for reception whereby the position of the weld zone 2 is easily detected.
摘要翻译：目的：通过从振荡器入射的超声波脉冲传递到焊接钢管，通过沿着焊接线传播脉冲并检测传输的电平的变化，从而以良好的再现性容易地和准确地检测焊接区的位置，具有良好的再现性脉冲与振荡器接收。构成：经受高频电阻焊接的电焊钢管1的焊接区域2沿着管的轴向形成直线焊接线，并且在焊接之后进行退火处理和焊道切割。在管道的外周上设置有与管1相对的圆周方向旋转的振荡器组5，并且用于扫描的超声波脉冲从用于所述组的传输的振荡器5发射并与焊缝。所述脉冲在管1的管壁表面1A，1B的内侧和外侧重复反射，并且在管壁之间的平行度受到干扰的同时在焊接区2中产生大的脉冲电平变化。用用于接收的振荡器4检测这样的脉冲，从而容易地检测焊接区2的位置。

5. 发明专利

JPS6264948A METHOD FOR DETAILED FLAW DETECTION OF WELDED PART 失效
公开(公告)号：JPS6264948A
公开(公告)日：1987-03-24
申请号：JP20497185
申请日：1985-09-17
申请人： NIPPON STEEL CORP
发明人： ASANUMA SHINJI , HIDAKA TETSUYA , KAWAMURA KOJI , HIRAMOTO KIYOHARU
IPC分类号： G01N29/04
摘要： PURPOSE:To enable detailed inspection and the judgement of a flaw by certainly detecting only a harmful flaw, by arranging probes each having a narrow beam width in a mesh pattern so that the passing loci of the ultrasonic beams from the probes mutually have proper superposed flanges. CONSTITUTION:A preset area to be inspected, the positions of probes known in relative positional relation, a flaw position classified by a flaw kind, an echo height and a flaw length are preliminarily stored in the judge matrix of a signal processor 26' and, at first, an echo position 21 and and echo height 22 are obtained from a flaw detection signal 20 in a flaw detection apparatus 20'. The position 21 is corrected by the seam monitor signal 23 from a seam monitor apparatus 23'. A length measuring device 17' takes synchronous relation to the apparatus 20' and performs the measurement of a flaw length 18 and a position 19 in a longitudinal direction due to a flaw echo in a real time. The matrix 26 having taken in these signals compares the kind, size and acceptance of a flaw with preset information to evaluate the same and subsequently performs the delivery of a spray marker 24 to a material to be inspected and that of a signal to the automatic input to an on-line computer system 25.

6. 发明专利

JPS59197350A Continuous casting mold 失效
标题翻译：连续铸造模具
公开(公告)号：JPS59197350A
公开(公告)日：1984-11-08
申请号：JP6916383
申请日：1983-04-21
申请人： Nippon Steel Corp
发明人： MURATA MITSUO , HIRAMOTO KIYOHARU , WADA KANAME
IPC分类号： B22D11/04 , B22D11/053 , B22D11/055
摘要： PURPOSE: To prevent seizure between a casting mold and a billet by forming a thin-walled part on the wall surface of the casting mold near the meniscus of a molten metal and providing a hammering mechanism which applies impulsive waves to the thin walled part.
CONSTITUTION: A thin walled part 12 is made on the wall surface of a casting mold near the meniscus of a molten metal in said mold and a water cooling box 14 is connected to the rear thereof. Hammers 20, 20' are installed on the outside of the short sides 2, 2' of the box 14 and on the side opposite to the box 14. When the part 12 is struck with the hammers 20, 20', impulsive waves 22, 22' are generated and propagate radially around the hammering points in the part 12. The oscillation is thus generated in the direction perpendicular to the casting direction, by which the seizure between the mold and the billet is prevented.
COPYRIGHT: (C)1984,JPO&Japio
摘要翻译：目的：通过在熔融金属弯液面附近的铸模壁表面上形成薄壁部分，防止铸模与钢坯之间的咬合，并提供对薄壁部分施加冲击波的锤击机构。构成：在模具的熔融金属的弯液面附近的铸模的壁面上形成有薄壁部12，水冷箱14与其后部连接。锤20,20'安装在箱14的短边2,2'的外侧，并且与箱14相反的一侧安装。当部件12与锤20,20'，冲击波22相撞时， 22'产生并在部件12中的锤击点周围径向传播。因此，在与铸造方向垂直的方向上产生振动，由此防止了模具和坯料之间的咬合。

7. 发明专利

JPS56148054A WELD EXAMINATION FOR STEEL PIPE 失效
公开(公告)号：JPS56148054A
公开(公告)日：1981-11-17
申请号：JP5129280
申请日：1980-04-18
申请人： NIPPON STEEL CORP
发明人： KAWAMURA KOUJI , USUKI MASAYOSHI , HIRAMOTO KIYOHARU
IPC分类号： B23K31/00 , G01N29/04 , G01N29/11 , G01N29/44 , G01N29/48
摘要： PURPOSE:To obtain an accurate weld examination by a method inwhich ultrasonic wave is projected perpendicularly on the pipe surface and multiple reflected wave forms from the inside surface of the pipe are checked. CONSTITUTION:An ultrasonic probe is scanned along a line crossing the weld line of welded steel pipe. Ultrasonic wave is projected perpendicularly on the surface of the pipe to get multiple waves reflected back from the inside surface of pipe. As the welded part is formed in such a shape as the ultrasonic wave projected perpendicularly on the pipe surface is scattered, there are differences in wave forms reflected from the inside surface of pipe between for the matrix material of pipe and for the welded part of pipe. The integrated value of echoes from the inside surface within a preset duration, grand sum of echo waves or attenuation characters of multireflected waves and so on are recorded and thereby these values are compared with each reference value or the characteristic curve previously designated to discriminate whether they are from the matrix material or from the welded part.

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