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1. 发明专利

JPH0416518B2 失效
公开(公告)号：JPH0416518B2
公开(公告)日：1992-03-24
申请号：JP6566887
申请日：1987-03-23
申请人： NIPPON KOKAN KK , YUSHIRO KAGAKU KOGYO KK
发明人： WADANO KATSUMI , KAMEMURA YOSHIKI , KOJIMA SEIJI , KANDA NOBORU , HIROBE MASAHISA
IPC分类号： B21B25/04 , C10M103/06 , C10M145/40 , C10M173/02 , C10N10/06 , C10N10/16 , C10N20/06 , C10N30/00 , C10N40/24 , C10N50/02

2. 发明专利

JPS613005A PLUG FLAW AND WEAR DETECTOR FOR ROLLING MILL FOR MANUFACTURING SEAMLESS STEEL PIPE 失效
公开(公告)号：JPS613005A
公开(公告)日：1986-01-09
申请号：JP12383084
申请日：1984-06-18
申请人： NIPPON KOKAN KK
发明人： AKITA SHINJI , HATANAKA MASAYUKI , KOMINE ISAMU , YOSHIDA MASATO , WADANO KATSUMI , NAKAMURA TOSHIO
IPC分类号： B21B25/00 , G01B11/16 , G01N21/84 , G01N21/88 , H04N7/18
摘要： PURPOSE:To enable a flaw or wear to be detected reliably and accurately, by irradiating a traveling plug by a flash light of a strobe means, picking up a stationary image of the plug by an ITV camera, and processing this image by a CPU. CONSTITUTION:When a plug 6 attached to the distal end of a mandrel bar 5 enters the field of view of an ITV camera 11, a flash light 12 emits light and, in synchronism with this, the stationary image of the plug 6 is stored in a memory 16' when the plug 6 has not yet been used, and in a memory 16 when it is in use. The two images are subjected to a profiled extracting processing in an image processing circuit 19, and an amount of offset between the images is then obtained. An object image is moved so as to coincide with a reference image, thereby correcting the offset, and a difference therebetween is then obtained. This difference is processed, e.g., binary-coded, and areal calculation is carried out to obtain quantitatively the size of a flaw or wear. When the obtained value exceeds a preset value, an alarm is sounded. Accordingly, the detecting operation can be automatically conducted, and detection can be carried out reliably and accurately on the basis of a predetermined reference value.

3. 发明专利

JPS51112463A METHOD AND DEVICE FOR SUPPLYING PLUG TO OBLIQUE ROLLING MILL 失效
公开(公告)号：JPS51112463A
公开(公告)日：1976-10-04
申请号：JP3825375
申请日：1975-03-28
申请人： NIPPON KOKAN KK
发明人： KAMIMURA HARUO , YAMASHITA YUKIO , FUJIMORI YOSHINOBU , WADANO KATSUMI
IPC分类号： B21B25/06

4. 发明专利

JPS5127853A KOKANATSUENKI NIOKERU SOKANNAIBUHENOJUNKATSUZAIKYOKYUHOHOOYOBI SOCHI 失效
公开(公告)号：JPS5127853A
公开(公告)日：1976-03-09
申请号：JP9616974
申请日：1974-08-23
申请人： NIPPON KOKAN KK
发明人： KAMIMURA HARUO , NAKAI SHUNJI , NARAHARA TAKEFUMI , WADANO KATSUMI
IPC分类号： B21B25/04 , B21B45/02

5. 发明专利

JPS63234092A FLAW OCCURRENCE-PREVENTING AGENT FOR PRODUCING SEAMLESS STEEL PIPE AND METHOD FOR PREVENTING FLAW OF SEAMLESS STEEL PIPE 失效
公开(公告)号：JPS63234092A
公开(公告)日：1988-09-29
申请号：JP6566887
申请日：1987-03-23
申请人： NIPPON KOKAN KK , YUSHIRO CHEM IND
发明人： WADANO KATSUMI , KAMEMURA YOSHIKI , KOJIMA SEIJI , KANDA NOBORU , HIROBE MASAHISA
IPC分类号： B21B25/04 , C10M103/06 , C10M145/40 , C10M173/02 , C10N10/06 , C10N10/16 , C10N20/06 , C10N30/00 , C10N40/24 , C10N50/02
摘要： PURPOSE:To obtain the titled preventing agent containing a sand having specific particle size, etc., thickener and water at a specific ratio, capable of effectively preventing shoe mark by continuously feeding the agent between shoe and billet and between shoe and shell and preventing slip phenomenon during rolling operation. CONSTITUTION:The aimed preventing agent which is a water dispersion, containing (A) 3-70wt.% one or more kind selected from group consisting of sand having

6. 发明专利

JPS56144808A ROLLING METHOD FOR SEAMLESS STEEL PIPE BY PLUG MILL 失效
公开(公告)号：JPS56144808A
公开(公告)日：1981-11-11
申请号：JP4809980
申请日：1980-04-14
申请人： NIPPON KOKAN KK
发明人： KAMIMURA HARUO , HORI MITSUAKI , WADANO KATSUMI , TANAKA MEGUMI
IPC分类号： B21B17/08
摘要： PURPOSE:To prevent generation of defective product with insufficient length, and to make the billet weight diminishable, by installing a mechanism for correcting the roll clearance correspondingly to the billet weight. CONSTITUTION:Reference data such as the reference weight of bilet, the density of billet, the reference length of hollow piece, the reference sectional area of hollow piece, the diameter of roll caliber, the plug diameter is previously inputted to computer 7, and the computer 7 previously operates the roll clearance of roll 1 depending on these input data. Each billet 5 is weighted on the weighing scale 6, and the weighted data is inputted to the computer 7 wherein the datum is compared with the reference weight of billet, and the deviation DELTAW of the concerned billet weight is obtained therein. The computer 7 thereupon operates the correction value DELTAC for the roll clearance. The signal of this DELTAC is inputted to the roll clearance adjuster 9 which then corrects the clearance of the roll 1. On the other hand, the compensation data is sent from the length measuring device 8 as the feedback to the computer 7.

7. 发明专利

JPS56111511A MANUFACTURE OF SEAMLESS STEEL PIPE 失效
公开(公告)号：JPS56111511A
公开(公告)日：1981-09-03
申请号：JP1359980
申请日：1980-02-08
申请人： NIPPON KOKAN KK
发明人： YASUOKA HIDENORI , KAMIMURA HARUO , HORI MITSUAKI , WADANO KATSUMI
IPC分类号： B21B19/10 , B21B23/00 , B21D3/04
摘要： PURPOSE:To make the sizing pass after hardening and tempering treatments unnecessary, by previously giving a diametral deviation along the longitude to the pipe blank through the sizing pass before the heat treatment, and by correcting the sectional roundness of the pipe through the rotary roundness correcting work, at manufacturing the seamless steel pipe. CONSTITUTION:At manufacturing the seamless steel pipe, the pipe blank is previously formed into a tapered shape by applying a sizing work to the pipe blank with the biased rotary sizer in anticipation of the outer diametral deviation along the longitude, which occurs in the following heat treatment. This diametral deviation is canceled by the diametral deviation occurring through the hardening and tempering treatments; hereby, the steel pipe is freed from the diametral deviation along the longitude. The roundness deviation in the section of the steel pipe, occurring through the heat treatment, is corrected by the rotary roundness corrector at a temperature range from 250 deg.C to the tempering temperature, after the heat treatment. According to the present method, the seamless steel pipe can be manufactured at a low cost without necessity of the sizing pass after the heat treatment.

8. 发明专利

JPS53100156A AUTOMATIC CONTROLLING METHOD OF SEAMLESS PIPE ROLLING MILL 失效
公开(公告)号：JPS53100156A
公开(公告)日：1978-09-01
申请号：JP1409077
申请日：1977-02-14
申请人： NIPPON KOKAN KK
发明人： KOMINE ISAMU , WADANO KATSUMI , AKITA SHINJI , YAMASHITA YUUHEI
IPC分类号： B21B17/12 , B21B37/78
摘要： PURPOSE:To produce the seamless pipe with wall thickness of specified dimension, by compensating the longitudinal temperature distribution of pipe blank, the expansion of plug, the dimension of the plug, the wall thickness difference in pipe blank, etc., through measurement on the rolling load, the inlet side pipe blank temperature, the plug diameter, and the pipe length postrolling.

9. 发明专利

JPH06220536A PRODUCTION OF HIGH STRENGTH STEEL PIPE EXCELLENT IN SULFIDE STRESS CORROSION CRACKING RESISTANCE 失效
公开(公告)号：JPH06220536A
公开(公告)日：1994-08-09
申请号：JP882193
申请日：1993-01-22
申请人： NIPPON KOKAN KK
发明人： KURIKI YOSHIRO , MINAMI YUSUKE , HASHIZUME SHUJI , WADANO KATSUMI
IPC分类号： C21D8/10 , C21D9/08 , C22C38/00 , C22C38/32
摘要： PURPOSE:To produce a steel pipe for an oil well by small energy by executing heat treatment to steel having a prescribed compsn. under specified conditions. CONSTITUTION:A continuously cast slab having a componental compsn. contg., by weight, 0.15 to 0.4% C, 0.1 to 1% Si, 0.3 to 1% Mn, 0.1 to 1.5% Cr, 0.1 to 1% Mo,

10. 发明专利

JPH0542308A PLANETARY REELER 失效
公开(公告)号：JPH0542308A
公开(公告)日：1993-02-23
申请号：JP22825991
申请日：1991-08-13
申请人： NIPPON KOKAN KK
发明人： HORI MITSUAKI , ASAKAWA HIROO , NAKAI SHUNJI , SANO SHIGERU , WADANO KATSUMI , HATANAKA MASAYUKI
IPC分类号： B21B13/20 , B21B17/02 , B21B19/10 , B21B35/12
摘要： PURPOSE:To offer a planetary reeler for improving the shape of inside surface and accuracy of thickness of tube which is rolled with a rolling mill of mandrel mill. CONSTITUTION:The planetary reeler A is arranged on the downstream side of the rolling mill of mandrel mill, an inner cylinder 2 which is freely rotatably mounted inside an outer cylinder 1 is revolved through a driving source, spur gear 8 and external gear 5. While two rolls 3 of which the axial lines are inclined by a prescribed angle 10 the directions that are mutually contrary with respect to the moving direction of a tube which is inserted into the inlet side of the planetary reeler A and freely rotatably mounted to the inner cylinder 2 are revolved around the periphery of the tube, they are made to rotate on their own axes through internal gears 7 and planet gears 6. In such a way, the outer surface of the tube is reduced with the rolls 3.

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