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1. 发明专利

JPH0147248B2 失效
公开(公告)号：JPH0147248B2
公开(公告)日：1989-10-13
申请号：JP8175783
申请日：1983-05-12
申请人： NIPPON KOKAN KK
发明人： NISHINO YUKIO , ITOJIMA KANJI , TOMA HIDEO , SASAKI TAKAHARU , KAZAMA SHINICHI , KUSAKA SHUICHI
IPC分类号： B21D5/01

2. 发明专利

JPS63123570A WELDING POSITION CONTROL METHOD 失效
公开(公告)号：JPS63123570A
公开(公告)日：1988-05-27
申请号：JP26750986
申请日：1986-11-12
申请人： NIPPON KOKAN KK
发明人： NISHINO YUKIO , SAWA MIKIO , SAIJO YOSHIO
IPC分类号： B23K9/127 , B23K9/12
摘要： PURPOSE:To improve weld line following accuracy by picking up a weld line and a temp. distribution in the direction to cross it as images by an ITV camera and an infrared camera and composing the images to control to fit a temp. peak point to the weld line. CONSTITUTION:The ITV camera 1 and the infrared camera 2 are installed on the unwelding side of a weld zone 3, namely, the outside of a steel pipe 4. The camera 1 picks up the weld line 5 which is an edge butt part as an image from the outside and the camera 2 picks up the temp. distribution in the direction to cross the weld line 5 as an image and the images 6 and 8 are projected on CRTs 7 and 9 respectively. Both picture signals are inputted to an image mixing circuit 10 and the image composing processing is performed so that the image 6 passes through a peak point of the image 8 on a monitor TV 11 and welding equipment is driven and controlled by a CPU 12 by its composite signal. Since the weld line can be simply controlled regardless of a weld line state, the following accuracy of the weld line is improved and a control system is simplified.

3. 发明专利

JPS61180612A MANUFACTURE OF SPIRAL STEEL TUBE HAVING PROJECTION 失效
公开(公告)号：JPS61180612A
公开(公告)日：1986-08-13
申请号：JP1987485
申请日：1985-02-06
申请人： NIPPON KOKAN KK
发明人： MATSUMOTO DOTAN , YOSHIOKA TOSHIKAZU , KAWASAKI JUNICHIRO , SAWA MIKIO , NISHINO YUKIO
IPC分类号： B21C37/12 , B21C37/26
摘要： PURPOSE:To make squashing of projections as small as possible and prevent lowering of adhesion of concrete by adding force that sends a steel tube having projections in a forming machine at plural places. CONSTITUTION:The spiral steel tube 1 having inside projections is made by rewinding a coil by an uncoiler, flattening a steel plate 10 having projections by a leveler 12, prebending the edge part by a prebender 14 and sending into a forming machine 15. At this time, sending force of the steel plate 10 having projections is applied by driving rolls 23 arranged between the leveler 12 and prebender 14. The driving rolls 23 are constituted of three sets of rolls 23. Sending force of the steel plate 10 having projections is dispersed to three places and rolling force applied to individual roll 23a is made small, and thus, squashing of projections is made as small as possible.

4. 发明专利

JPS605375B2 失效
公开(公告)号：JPS605375B2
公开(公告)日：1985-02-09
申请号：JP5710677
申请日：1977-05-19
申请人： NIPPON KOKAN KK
发明人： SUGYAMA TADAO , NISHINO YUKIO
IPC分类号： B21C37/12

5. 发明专利

JPS5832006B2 失效
公开(公告)号：JPS5832006B2
公开(公告)日：1983-07-09
申请号：JP5710877
申请日：1977-05-19
申请人： NIPPON KOKAN KK
发明人： SUGYAMA TADAO , NISHINO YUKIO
IPC分类号： B21C37/12

6. 发明专利

JPH1019188A INSERTION TYPE PIPE JOINT 失效
公开(公告)号：JPH1019188A
公开(公告)日：1998-01-23
申请号：JP17366796
申请日：1996-07-03
申请人： NIPPON KOKAN KK , NIPPON KOKAN PIPE FITTING MFG
发明人： NISHINO YUKIO , KATO TOMIJI , OKAZAKI YOSHIRO
IPC分类号： F16L21/00 , F16L37/04 , F16L58/18
摘要： PROBLEM TO BE SOLVED: To obtain a specified retaining function while relative movement between a joint main body and a metallic pipe followed by change in temperature is being permitted by providing both each ring shaped elastic seal member which is elastically in contact with the outer circumferential surface of the metallic pipe and each ring shaped retaining member provided with a plurality of locking pawls in its circumferential direction, which are inclined so as to be projected much more as they go forward. SOLUTION: When a metallic pipe 1 is inserted in a joint main body 2 so as to be pushed in from each pipe insertion opening 5 in which an elastic seal member 3 is fitted, locking pawls 4B... of each retaining member 4 are elastically deformed outward in the radial direction, and the locking-pawls 4B... easily ride across an annular groove part 1A formed over the outer circumferential surface of the metallic pipe 1 so as to be smoothly inserted to a depth as specifed. In a pipe connected condition that the metallic pipe 1 is inserted to a specified depth while pushing force is exhausted, the tip end parts of the locking pawls 4B... are elastically in contact with pressure with the smooth outer circumferential surface of the metallic pipe 1 at the deeper side from the groove part 1A, relative movement with the joint main body 2 caused by the extension and contraction of the metallic pipe 1 followed by change in temperature, is permitted, however, a retaining function is exhibited by means of the engagement of the locking pawls 4B... with the annular groove 1A.

7. 发明专利

JPH0451267B2 失效
公开(公告)号：JPH0451267B2
公开(公告)日：1992-08-18
申请号：JP30151086
申请日：1986-12-19
申请人： NIPPON KOKAN KK
发明人： HIRANO OSAMU , HIRATA KENICHI , SASAKI TAKAHARU , KUSAKA SHUICHI , NISHINO YUKIO
IPC分类号： B23K9/16 , B23K9/173 , B23K9/235 , B23K35/38

8. 发明专利

JPH03226311A MANUFACTURE OF LARGE SQUARE STEEL PIPE 失效
公开(公告)号：JPH03226311A
公开(公告)日：1991-10-07
申请号：JP1987290
申请日：1990-01-30
申请人： NIPPON KOKAN KK
发明人： HIRANO OSAMU , UME KAZUYOSHI , SAWA MIKIO , NISHINO YUKIO
IPC分类号： B21C37/15
摘要： PURPOSE:To allow a highly efficient manufacture of a large square steel pipe with high accuracy by forming a circular steel pipe to an almost square shape, after then, pressing it from its inner surface and finishing it to the prescribed square shape. CONSTITUTION:A circular welded steel pipe 1 obtained with welding after UO forming is roughly press-formed to an almost square shape with a press dies 2d and 2b being arranged in an axial symmetry with respect to this steel pipe 1. Further, the corner part is pressed from its inner side with a head 3 of a pipe expanding machine, and is finished to the prescribed shape and dimension. Because of utilizing an UOE process being the mass production process for steel pipe, the manufacture of the large square steel pipe can be highly efficiently executed at a low cost. And by roughly press-forming the circular steel pipe 1 to the almost square shape before the pipe expansion, while reducing a pipe expanding stroke of this pipe expanding machine, the accuracy of dimension of the corner part and the plain part can be improved.

9. 发明专利

JPH026811B2 失效
公开(公告)号：JPH026811B2
公开(公告)日：1990-02-14
申请号：JP14044085
申请日：1985-06-28
申请人： NIPPON KOKAN KK
发明人： NISHINO YUKIO , OKAMOTO SHOSUKE , MATSUO SHIGETO , KAZAMA SHINICHI
IPC分类号： C21D9/08 , C21D9/50

10. 发明专利

JPS63154266A HIGH-SPEED GAS SHIELDED ARC TACK WELDING METHOD 失效
公开(公告)号：JPS63154266A
公开(公告)日：1988-06-27
申请号：JP30151086
申请日：1986-12-19
申请人： NIPPON KOKAN KK
发明人： HIRANO OSAMU , HIRATA KENICHI , SASAKI TAKAHARU , KUSAKA SHUICHI , NISHINO YUKIO
IPC分类号： B23K9/16 , B23K9/173 , B23K9/235 , B23K35/38
摘要： PURPOSE:To stably speed up the titled welding by providing a push angle and a drag angle to a preceding electrode and a succeeding electrode containing flux with more than specific diameters respectively and making an interval between the tips of these electrodes in the specific range to perform the tack welding with an electric current with the phase difference under shielding gas. CONSTITUTION:The push angle and the drag angle with 0-20 deg. are provided to the preceding electrode containing flux with the diameter >=3.2 mm and the succeeding electrode containing flux with the diameter =50% to perform the progressive welding of a weld zone with the 200-2000A AC welding current with the phase difference. The mutual intervention of arcs is prevented by the current with the phase difference with the proper distance between both the electrodes in tandem and the conventional welding speed =abt. 12m/min stably to improve the welding efficiency.

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