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1. 发明专利

JPH09141519A ROLLED STEEL STRIP FISH TAIL DETECTING METHOD AND CUTTING DEVICE 失效
公开(公告)号：JPH09141519A
公开(公告)日：1997-06-03
申请号：JP30139895
申请日：1995-11-20
申请人： NIPPON KOKAN KK , FURUSHIMA TEKKOSHO KK
发明人： NAKATANI HIROSHI , NAKAYAMA YASUTOSHI , SHIMADA TAKASHI , KAWAGUCHI ATSUSHI , ASANO MASASHI
IPC分类号： B23D36/00
摘要： PROBLEM TO BE SOLVED: To execute cutting of a fish tail at a good yield so as to attain labor saving and high efficiency. SOLUTION: A fish tail 1a of a rolled steel strip 1 is photographed by a CCD camera 2, and a luminance change part is extracted on the basis of an image signal 3 inputted to an image processing device 4 and a cutting position setting device 5. The shape of the fish tail 1a is judged from the continuous state of extracted luminance change points, and the continuous state of the luminance change points is classified by directions and the number of continuity to eliminate invalid luminance change points caused by disturbance such as rust, soil and the like on the surface of the rolled steel strip 1, thus improving shape detecting accuracy. The detected result is converted into X-Y coordinates, and the maximum value of a curve on the X-Y coordinates is qualified as the tip of the fish tail 1a, while the minimum value of the curve is qualified as a bottom part of the fish tail 1a, and the fish tail 1a is cut by cutting mechanism C receiving a cutting signal 6 qualifying the bottom part as a cutting position, and an alignment signal 7.

2. 发明专利

JP2000042754A ELECTRODE DIE FOR FLASH BUTT WELDING EQUIPMENT 失效
公开(公告)号：JP2000042754A
公开(公告)日：2000-02-15
申请号：JP21556998
申请日：1998-07-30
申请人： NIPPON KOKAN KK
发明人： TSURUMARU HIDEYUKI , NAKAYAMA YASUTOSHI , SHIBUYA KIYOBUMI , MATSUDA HIROSHI , ONO MORIAKI
IPC分类号： B23K9/32 , B23K11/04 , B23K11/30 , B23K11/36
摘要： PROBLEM TO BE SOLVED: To sufficiently prevent an oxide inclusion from remaining at a welding boundary and also a weld zone from being rapidly cooled by preventing spatters at welding from depositing at a gas discharge port thereby normally supplying the gas from the gas discharge port in nonoxidation flash butt welding. SOLUTION: The electrode die 1 of a flash butt welding equipment, in which gas discharge ports 3 are arranged above and below a welding part, is provided with water cooling means 6 for lowering the side face temp. of a welding part side of the electrode die therein.

3. 发明专利

JPH10156696A GRINDSTONE APPLICATION METHOD FOR INSPECTING SURFACE OF ROLLED STEEL PLATE AND DEVICE THEREOF 失效
公开(公告)号：JPH10156696A
公开(公告)日：1998-06-16
申请号：JP32191896
申请日：1996-12-02
申请人： NIPPON KOKAN KK
发明人： NAKATANI HIROSHI , NAKAYAMA YASUTOSHI , SENOO TAKUJI , MIYOKAWA KEIICHI
IPC分类号： B24B27/033
摘要： PROBLEM TO BE SOLVED: To apply a grindstone to a surface of a coillike rolled steel plate efficiently by moving a grindstone body in contact with it along an outer peripheral face of the coillike rolled steel plate in the direction of rolling and in the direction of width of the coillike rolled steel plate for grinding. SOLUTION: A grindstone is applied by moving a grindstone body 6 minutely along a guide rail 7 in the direction of coil width and by reciprocating the grindstone body 6 in the longitudinal direction of a coil through the guide rail 7 by a guide rail travel mechanism 2. The application of the grindstone is done for a cold rolled steel plate and a pressure adjusted steel plate 1. Pressing pressure of the grindstone body 6 during grinding is controlled to 0.3 to 0.5kgf/ cm for the cold rolled steel plate and 0.2 to 0.3kgf/cm for the pressure adjusted steel plate 1. Moreover, travel speed of the grindstone body 6 is controlled to 2.0m/sec or less and 1.5m/sec or less.

4. 发明专利

JP2738001B2 失效
公开(公告)号：JP2738001B2
公开(公告)日：1998-04-08
申请号：JP8929989
申请日：1989-04-07
申请人： NIPPON KOKAN KK
发明人： NABE SHIGEKI , YAMAMOTO MASAHARU , OONO NARYUKI , KOBAYASHI ISAO , SHIRAISHI KAORU , NAKAYAMA YASUTOSHI
IPC分类号： B21B37/18 , B21B37/26 , B21B37/72

5. 发明专利

JPH07284846A METHOD FOR COILING METALLIC STRIP 失效
公开(公告)号：JPH07284846A
公开(公告)日：1995-10-31
申请号：JP7356294
申请日：1994-04-12
申请人： NIPPON KOKAN KK
发明人： HOSOYA SHIGEFUMI , NAKAYAMA YASUTOSHI , UNO SEIJI
IPC分类号： B65H75/28 , B21C47/02 , B21C47/26 , B65H18/00
摘要： PURPOSE:To reduce a wrap mark generated in coiling in a method for coiling a metallic strip. CONSTITUTION:The method is such that a metallic strip is coiled after the thickness on the side of a take-up reel 2 at the tip end 1 of a metallic strip is made ten times as long as the original thickness of the metallic strip in the longitudinal direction and also made a tapered shape 6 with a cross section of 0.3 to 0.75 times as much as the original cross section. The invention stipulates the tapered shape and the coiling direction while also taking into consideration fine phenomenon at the coiling part; accordingly, if a working length is the same, the wrap mark can be greatly reduced.

6. 发明专利

JPH0523724A WARM ROLLING EQUIPMENT FOR STEEL SHEET 失效
公开(公告)号：JPH0523724A
公开(公告)日：1993-02-02
申请号：JP19994491
申请日：1991-07-15
申请人： NIPPON KOKAN KK
发明人： NAKAYAMA YASUTOSHI , TANABE SHUNICHI , JIROUMARU KAZUMI , BABA YUTAKA
IPC分类号： B21B1/22 , B21B39/00 , B21B45/00
摘要： PURPOSE:To prevent steel sheet from falling in temperature and breaking, etc., by injecting steam from a steam injecting header and rolling the steel sheet as the temperature of the steel sheet is held. CONSTITUTION:The steam injecting header 4 is arranged only above the passing position of the steel sheet between stand No.1 and stand No.2 but is arranged above and below the passing position of the steel sheet between stands after them. Each steam injecting header 4 has many, injectors along the longitudinal direction. In this way, the hot rolling of silicon steel sheet high in transition temperature can be carried out without generating such a trouble as breaking etc., adequately and efficiently.

7. 发明专利

JPH11320104A FLASH-BUTT WELDING EQUIPMENT AND WELDING METHOD 失效
公开(公告)号：JPH11320104A
公开(公告)日：1999-11-24
申请号：JP12559598
申请日：1998-05-08
申请人： NIPPON KOKAN KK
发明人： MATSUDA HIROSHI , ONO MORIAKI , TSURUMARU HIDEYUKI , SHIBUYA KIYOBUMI , NAKAYAMA YASUTOSHI
IPC分类号： B23K11/04 , B23K11/36 , B23K31/00
摘要： PROBLEM TO BE SOLVED: To realize flash-butt welding to improve the quality of a weld zone by controlling hardening of the weld zone. SOLUTION: With this flash-butt welding equipment equipped with gas discharge ports 2 to supply combustible gas to upper and lower sides of the welded portion of the material to be flash-butt-welded, a system to supply the combustible gas to the gas discharge ports 2 is equipped with an adjusting means 6 for the type and flow rate of the combustible gas. Multiple gas discharge ports for the combustible gas are arranged in the width direction of the welded material, and the combustible gas supply system is provided with a means to control the flow rate and quantity of input heat of the combustible gas to be supplied to the gas discharge ports in the width direction of the welded material.

8. 发明专利

JPH10310887A METHOD FOR ACID-PICKLING METALLIC MATERIAL 失效
公开(公告)号：JPH10310887A
公开(公告)日：1998-11-24
申请号：JP12051897
申请日：1997-05-12
申请人： NIPPON KOKAN KK
发明人： OISHI HITOSHI , NAKAYAMA YASUTOSHI , ENOMOTO TATSUTAKA , HARADA YOSHIHISA
IPC分类号： C23G1/08 , C23G3/02
摘要： PROBLEM TO BE SOLVED: To prevent the excess acid-pickling of a metallic material developed at the time of stopping the conveying by adjusting gas exhausting quantity of the atmosphere in each acid-pickling vessel in holding upward the material from acid solution at the time of stopping the conveying. SOLUTION: The metallic material 6 of a steel strip, etc., passes through warm water 21 in an inlet side warm water vessel 2 to raise the temp. thereof. Successively, the metallic material passes through the acid solution 20 in the acid-pickling vessels #1 la-#6 1f to remove scale on the surface. The acid solution 20 is washed with a spraying device 4 and the outlet side warm water vessel 3, and the moisture is removed with a drying device 5. At the time of stopping the conveying, the metallic material 6 of the steel strip, etc., is held upward from the acid solution 20 with a lifter 22. Gas exhausting flow rate adjusting valves 8a-8i in the exhaust ducts 7a-7i arranged to each vessel are adjusted so that the exhaust gas quantity at the outlet side of the acid-pickling device is made larger than that at the inlet side thereof. The dropping of the acid solution 20 bedewed on the upper covers of the acid-pickling vessels #1 1a-#6 1f is prevented and the excess acid pickling phenomenon is reduced.

9. 发明专利

JPH02268914A METHOD FOR CONTROLLING THICKNESS IN COLD CONTINUOUS ROLLING MILL 失效
公开(公告)号：JPH02268914A
公开(公告)日：1990-11-02
申请号：JP8929989
申请日：1989-04-07
申请人： NIPPON KOKAN KK
发明人： NABE SHIGEKI , YAMAMOTO MASAHARU , ONO NARIYUKI , KOBAYASHI ISAO , SHIRAISHI KAORU , NAKAYAMA YASUTOSHI
IPC分类号： B21B37/18 , B21B37/26 , B21B37/72
摘要： PURPOSE:To improve the coiling property in a coiler and to improve the passing property in the following stage by rolling the neighborhood of the cutting point of a strip to the thickness larger than an indicated value. CONSTITUTION:In the preceding material 20 of a rolled coil, the target plate thickness is set at a value larger than an indicated value at point A ahead by a prescribed length (1a) of point B. Consequently, the preceding material 20 and the succeeding material 21 are rolled to a thickness larger than a value indicated near the cutting point B. At point C obtained by rolling the succeeding material 21 by a prescribed length (1b), the sheet thickness is set to the thickness of a product of the succeeding material 21. Accordingly, when the strip is rolled slightly thickly before and behind the cutting position, the preceding material 20 of the coil increases in thickness and rigidity, and the coiling property in a coiler is improved and the passing property in the following stage is improved.

10. 发明专利

JP2000070764A ROLLING OIL CLEANER AND CLEANING METHOD 失效
公开(公告)号：JP2000070764A
公开(公告)日：2000-03-07
申请号：JP24061798
申请日：1998-08-26
申请人： NIPPON KOKAN KK , NIIGATA UOSHINTON KK
发明人： SUGIMOTO SHUICHI , NAKAYAMA YASUTOSHI , MATSUKAGE SEISAKU , FUJITA YASUHIRO , FUKUMOTO KANJI
IPC分类号： B04C5/26 , B21B45/02
摘要： PROBLEM TO BE SOLVED: To clean a rolling oil circulated and used in the cold rolling of a steel strip. SOLUTION: A rolling oil used in a rolling device 1 and contg. foreign matter is introduced into a first centrifugal separator 4. The rolling oil concentrated in foreign matter is discharged into a second centrifugal separator 5, and the clean rolling oil freed from foreign matter is simultaneously discharged into a third centrifugal separator 6, and the rolling oil concentrated in foreign matter is discharged into a fourth centrifugal separator 7. The rolling oil concentrated in foreign matter discharged from the first and third separators 4 and 6 is further concentrated in foreign matter in the second and fourth separators 5 and 7 to separate foreign matter, and the separated foreign matter is discharged outside the system. The clean rolling oil freed from foreign matter is discharged into a circulating line on the upstream side of the first separator 4 or on the downstream side of the first or third separator 4 or 6.

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