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1. 发明专利

JPH11325873A LAP SEAM WELDING ABNORMALITY DETECTOR 失效
公开(公告)号：JPH11325873A
公开(公告)日：1999-11-26
申请号：JP13175398
申请日：1998-05-14
申请人： NIPPON KOKAN KK
发明人： KUSHIDA YASUO , KOSHIRO JUNJI
IPC分类号： G01B21/02 , B23K11/24
摘要： PROBLEM TO BE SOLVED: To provide a lap seam welding abnormality detector capable of accurately diagnosing the abnormality of a lap seam welding part. SOLUTION: This lap seam abnormality detector for detecting the abnormality of the lap seam welding part where the end part of a preceding band-form body 1 and the end part of a following band-form body 2 are overlapped and welded in a continuous strip processing line is provided with a detector 7 for detecting the respective edge positions of the preceding band-form body 1 and the following band-form body 2 at the welding part and an arithmetic unit 9 for comparing the output of detection signals detected by the detector 7 and computing a deviation amount between the preceding band-form body 1 and the following band-form body 2. Thus, welding abnormality due to the deviation of the position of the preceding band-form body 1 or the following band-form body 2 is automatically detected.

2. 发明专利

JPH08164408A ROLLING METHOD 失效
公开(公告)号：JPH08164408A
公开(公告)日：1996-06-25
申请号：JP30627594
申请日：1994-12-09
申请人： NIPPON KOKAN KK
发明人： HIRABAYASHI SATORU , TANAKA HAJIME , KATAOKA HISAAKI , KOSHIRO JUNJI , MURATA SATOSHI
IPC分类号： B21B13/02 , B21B13/14 , B21B31/20 , B21B37/18
摘要： PURPOSE: To decrease the deflection of a work roll and to contrive high draft rolling by correcting a horizontal force which is applied to the work roll by a driving reaction force calculated from roll driving output and imparting an equal horizontal pushing force with a roll supporting device. CONSTITUTION: A 6-high rolling mill is composed of a rolled stock 1, work rolls 2, intermediate rolls 3, back-up rolls 4 and the roll supporting devices 5 consisting of back-up rolls 5a which are divided in the axial direction and cylinder devices 5b. To improve the estimated accuracy of the one-side horizontal pushing forces which are imparted to the work rolls 2 with the roll supporting devices 5, the correction of the horizontal pushing forces is executed through actual driving torques obtd. by adding the total driving torques at the time of rolling at a constant speed to the torques at the time of acceleration and deceleration. The horizontal pushing forces ST of the upper and lower work rolls which are determined by a prescribed equation are calculated by measuring load output at time of every acceleration and deceleration and constant speed, or at intervals of a sufficiently short time and individually imparted to the upper and lower work rolls. Where, P is a rolling load, TB is back tension, TF is front tension, TQ is driving torque, δ is the amount of offset, R is a radius of the intermediate roll, (r) is a radius of the work roll.

3. 发明专利

JPH08117823A METHOD FOR CORRECTING GAP AND CONTROLLER OF ROLLING MILL EQUIPPED WITH HORIZONTAL BENDING MECHANISM 失效
公开(公告)号：JPH08117823A
公开(公告)日：1996-05-14
申请号：JP25110194
申请日：1994-10-18
申请人： ISHIKAWAJIMA HARIMA HEAVY IND , NIPPON KOKAN KK
发明人： MINOURA KOJI , KUCHI MASAHIRO , KOSHIRO JUNJI , TOYOFUKU TATSUO
IPC分类号： B21B29/00 , B21B13/02 , B21B13/14 , B21B31/20 , B21B37/00 , B21B37/38 , B21B37/58 , B21B37/62
摘要： PURPOSE: Not to vary a gap between working rolls even when operating a bending cylinder by memorizing a rolling load and adjusting a hydraulic drawing down force for rolling with a memorized value so that the varied quantity of a rolling load during the operation of the bending cylinder becomes the minimum. CONSTITUTION: Rolling working is performed by working rolls 1 and 2, and the crowns of the working rolls 1 and 2 are controlled by horizontal pushing devices 12 and 13. The rolling loads of the working rolls 1 and 2 before the crowns are controlled by a hydraulic drawing down controller 24, are memorized by a memory. When the horizontal pushing devices 12 and 13 are worked to control the crowns, the rolling loads of the working rolls 1 and 2 are varied. The varied rolling loads are compared with the rolling loads memorized by a memory 24a with the hydraulic drawing down controller 24, and a hydraulic drawing down force for rolling is increased and decreased so that an original rolling load is attained. Therefore, influence such as mechanical hysteresis, the hysteresis of a pressure in a bending cylinder, etc., is eliminated, and a variation in plate thickness can be reduced.

4. 发明专利

JPH07178423A METHOD FOR ESTIMATING AND METHOD FOR CONTROLLING THICKNESS ON OUTLET SIDE OF ROLLING MILL 失效
公开(公告)号：JPH07178423A
公开(公告)日：1995-07-18
申请号：JP32299893
申请日：1993-12-22
申请人： NIPPON KOKAN KK
发明人： KOSHIRO JUNJI , TANAKA HAJIME , INOUE TAKUO
IPC分类号： B21B37/00 , G05D5/02
摘要： PURPOSE:To accurately detect the variation in thickness on the outlet side of stand generated during acceleration or deceleration and by slip or the like by estimating the value of thickness on the outlet side of stand based on the mass flow constant law from the value of thickness detected on the inlet side of a stand. CONSTITUTION:The measured values of thickness on the inlet side which are measured with a thickness gage 22 are sampled at a prescribed pitch. The microtracking of these values is executed depending on the advance of a rolled material to a position just under the stand 4. The measured values HIN of thickness on the inlet side executing microtracking, the measured values VIN of sheet speed on the inlet side of stand that are measured with a sheet speed meter 23 and the measured values VOUT of sheet speed on the outlet side that are measured with a sheet speed meter 24 are simultaneously sampled and the estimated value HOUT of thickness that is the latest thickness on the outlet side of the stand 4 is determined from these values by the next formula. HOUT = HINX VIN/VOUT. By estimating the value of thickness on the outlet side of stand based on the mass flow constant law, thickness on the outlet side just under the stand that is difficult to measure is estimated and the variation of thickness on the outlet side of stand is accurately detected.

5. 发明专利

JPS62292220A CONTROL METHOD FOR WINDING TENSION OF STEEL SHEET WINDING MACHINE 失效
公开(公告)号：JPS62292220A
公开(公告)日：1987-12-18
申请号：JP13502086
申请日：1986-06-12
申请人： NIPPON KOKAN KK
发明人： WATARAI MASARU , TANAKA KENJI , KOSHIRO JUNJI , JITSUKAWA MASAHARU , OZAKI DAISUKE , MIZOGUCHI FUJITOSHI
IPC分类号： B21C47/00 , B65H23/198
摘要： PURPOSE:To perform the winding tension control having no variation in the winding tension by controlling the field current in accordance with a coil diameter. CONSTITUTION:A coil diameter D21 is operated by inputting to a coil diameter arithmetic unit 20 a mandrel diameter D1, plate thickness (t), lap number (l), and correction coefficient alpha. This coil diameter 21 is inputted to a field current command arithmetic unit and phim/D is made constant by controlling field mag netic flux phim by outputting a field current command 24 so as to make phim/D constant according to the coil diameter D. The winding tension of a winding machine is thus made constant. The equation for finding the coil diameter D is D=D1+2.t.l.alpha, wherein D: coil diameter, D1: mandrel diameter, t: plate thickness, l: lap number and alpha: correction coefficient.

6. 发明专利

JP2001262236A METHOD FOR CONTROLLING WIDTH OF METALLIC STEEL STRIP 失效
公开(公告)号：JP2001262236A
公开(公告)日：2001-09-26
申请号：JP2000070376
申请日：2000-03-14
申请人： NIPPON KOKAN KK
发明人： UEHARA YUJI , HONDA AKIYOSHI , KOSHIRO JUNJI , YOSHIMURA HIROSHI , KIMURA YUKIO , IMAYADO TAKUMI , YOKOYAMA KAZUO
IPC分类号： C21D11/00 , C21D9/52 , C21D9/56
摘要： PROBLEM TO BE SOLVED: To provide a method for controlling the width of a metallic strip of high precision and high response, by which the problems that, when changing the rolling reduction of a leveller in accordance with the shrinkage of a sheet width, a long time is taken till the sheet width reaches a tolerance, in the meanwhile, the defect of the sheet width is generated, and the yield is reduced. SOLUTION: In a sheet width control arithmetic unit 8, a roll winding angle and tension are calculated and are outputted to a roll winding angle controller 9 and a tension controller 10, respectively. As shown in the figure, a sheet winding angle variable roll 6 and a bridle roll 4 are respective final controlled systems.

7. 发明专利

JPH11226619A METHOD FOR CONTROLLING COLD ROLLING MILL 失效
公开(公告)号：JPH11226619A
公开(公告)日：1999-08-24
申请号：JP3626698
申请日：1998-02-18
申请人： NIPPON KOKAN KK
发明人： MURACHI TOSHIHIKO , SHIKABAYASHI YUUJI , KOSHIRO JUNJI , SUGIMOTO SHUICHI
IPC分类号： B21B37/00 , B21B37/18 , B21B37/20 , B21B37/26
摘要： PROBLEM TO BE SOLVED: To effectively suppress the generation of off-gage in thickness at flying thickness changing point by correcting the setting error of roll gap which is generated by an error between thickness information and a actual thickness. SOLUTION: In this control method, the thicknesses before and behind the flying thickness changing point are measured with a thickness gage which is installed on the inlet side of each rolling stand of a cold rolling mill having plural rolling stands and the set point of roll gap is calculated based on the measured value which is obtained in the above manner. In such a case, thickness measuring parts before and behind the flying thickness changing point respectively consist of a part where automatic thickness control is interrupted about a preceding sheet and a completed part of flying thickness change about the succeeding sheet.

8. 发明专利

JP2755093B2 失效
公开(公告)号：JP2755093B2
公开(公告)日：1998-05-20
申请号：JP2321893
申请日：1993-01-19
申请人： NIPPON KOKAN KK
发明人： HIRABAYASHI SATORU , SHIRAISHI KAORU , KATAOKA HISAAKI , KOSHIRO JUNJI , OONO NARYUKI
IPC分类号： B21B1/28 , B21B37/00 , B21B37/28 , B21B37/48 , B21C47/00

9. 发明专利

JPH07185602A ROLLING METHOD OF STEEL SHEET HAVING EXCELLENT SURFACE CHARACTERISTIC AND SHAPE 失效
公开(公告)号：JPH07185602A
公开(公告)日：1995-07-25
申请号：JP34936493
申请日：1993-12-28
申请人： NIPPON KOKAN KK
发明人： HIRABAYASHI SATORU , SHIRAISHI KAORU , KATAOKA HISAAKI , KOSHIRO JUNJI , ONO NARIYUKI
IPC分类号： B21B3/02 , B21B1/22 , B21B45/02
摘要： PURPOSE:To provide a method for rolling capable of adequately yielding stainless steel sheets and other cold rolled steel sheets having excellent surface characteristics and shapes with a cold tandem rolling mill. CONSTITUTION:The diameter of the work rolls of a stand 4 just before the final stand of the cold tandem rolling mill is specified to 100 to 250mm and the diameter of the work roll of the final stand 5 is specified to 400 to 600mm like the fore stage stand of the rolling mill. Lubricant rolling by specifying the concn. of a water soluble lubricant to

10. 发明专利

JPH06190415A COLD TANDEM ROLLING METHOD FOR METALLIC STRIP 失效
公开(公告)号：JPH06190415A
公开(公告)日：1994-07-12
申请号：JP35814592
申请日：1992-12-25
申请人： NIPPON KOKAN KK
发明人： HIRABAYASHI SATORU , SHIRAISHI KAORU , KATAOKA HISAAKI , KOSHIRO JUNJI , ONO NARIYUKI
IPC分类号： B21B1/28 , B21B37/00 , B21B37/28
摘要： PURPOSE:To obtain, through a cold tandem continuous mill, a steel strip and other metallic strips requiring high luster in stainless steel, JIS-SC, JIS-SK, etc., excellent in surface properties, plate crown or shape or having high defor mation resistance, high luster or smoothness by containing high Ni. CONSTITUTION:In a metal rolled, by the cold tandem mill, the diameters of work rolls at the final stand and at the stand directly before it are given by 250-100mm, the draft at the final stand is given by 2-15% and the accumulative draft in the two stands is given by 20-40%. A material to be rolled is rolled by a pair of work rolls arranged so that a tapered part which is taper-ground at least to a one-sided edge part at preceeding stands other than two stands in the mill is positioned at edge parts on both sides of the material to be rolled, or, at a stand position where a pair of upper and lower work rolls which can be intersected at the horizontal position are combined as they are paired with backup rolls.

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