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41. 发明专利

JPH07179966A TITANIUM ALLOY MATERIAL EXCELLENT IN BLANKABILITY AND BLANKING METHOD 失效
公开(公告)号：JPH07179966A
公开(公告)日：1995-07-18
申请号：JP32811693
申请日：1993-12-24
申请人： NIPPON KOKAN KK
发明人： HORIE MASAYUKI , SUZUKI KOJI
IPC分类号： B21D28/02 , C22C14/00
摘要： PURPOSE:To obtain a titanium alloy material excellent in blankability by forming a titanium alloy material, to be cold-blanked, into a crystalline structure of specific crystalline grain size. CONSTITUTION:The structure of a titanium alloy material such as Ti-6Al-4V alloy, to be cold-blanked, is formed into a crystalline structure of

42. 发明专利

JP2002346619A METHOD FOR CONTROLLING CAMBER OF ROLLED SHEET 失效
公开(公告)号：JP2002346619A
公开(公告)日：2002-12-03
申请号：JP2001161078
申请日：2001-05-29
申请人： NIPPON KOKAN KK
发明人： HIRATA KENJI , HORIE MASAYUKI , UDAGAWA TATSURO , SUGIOKA MASATOSHI , YAMAZAKI KAZUYA
IPC分类号： B21B37/30 , B21B37/00 , B21B37/28 , B21B37/58
摘要： PROBLEM TO BE SOLVED: To provide a method for controlling the camber of a sheet to be rolled wherein cambering can be restrained by adequate leveling in consideration of a structural differential load varying by means of a configuration-controlling actuator and even in the case of a change in the work roll bending force within the pass. SOLUTION: In a rolling process wherein a sheet material is thinned to a product thickness by a rolling mill equipped with either or both of a roll shifting device and a roll bending device, the vertical rigid displacement of the upper and lower work rolls during rolling is computed based on either or both of the roll shifting amount and the roll bending force, the predicted rolling load and the mill rigidity at the drive side and work side. Based on this, the leveling amount is set whereby, in controlling the camber of the sheet, the vertical rigid displacement of the upper and lower work rolls is re-computed according to the variation of the roll bending force within the pass after the commencement of rolling, and based on this, the set leveling amount is corrected.

43. 发明专利

JP2002239620A APPARATUS AND METHOD FOR GUIDING ROLLED METAL PLATE 失效
公开(公告)号：JP2002239620A
公开(公告)日：2002-08-27
申请号：JP2001044679
申请日：2001-02-21
申请人： NIPPON KOKAN KK
发明人： HIRATA KENJI , HORIE MASAYUKI , UDAGAWA TATSURO
IPC分类号： B21B39/14
摘要： PROBLEM TO BE SOLVED: To provide a guiding apparatus and a guiding method for rolled metal plates by which drift in a rolling pass is suppressed by suppressing lifting in the width end parts of the rolled metal plate which is caused on the inlet and outlet sides of a rolling mill. SOLUTION: In a rolling mill group for reducing the thickness of a metal plate is reduced to a product thickness, the guiding device 5 the guiding position of which is movable in the thickness and width directions of the rolled metal plate 4 and with which the lifting of the rolled metal plate 4 is suppressed is provided in at least one place in the longitudinal direction of both or either of the inlet and outlet sides of the rolling mill.

44. 发明专利

JP2001038413A PACK ROLLING METHOD 失效
公开(公告)号：JP2001038413A
公开(公告)日：2001-02-13
申请号：JP21163799
申请日：1999-07-27
申请人： NIPPON KOKAN KK
发明人： HORIE MASAYUKI , HIRATA KENJI
IPC分类号： B21B47/00 , B21B3/00 , B21B3/02
摘要： PROBLEM TO BE SOLVED: To provide a pack rolling method which can produce products with less thickness deviation by eliminating such problems as thickening of end portions of a core material and thickness deviation of a longitudinal end portion in pack rolling. SOLUTION: In the pack rolling method to manufacture the sheet of a core material 1 by covering one or multiple pieces of plate-like core material 1 with a cover material 2 and a spacer material 3 so as to form a pack slab and by rolling the pack slab, the cover material 2 and the core material 1 are spliced by the length more than the thickness of the core material 1 in the rolling direction at the leading and trailing ends of the core material 1 in the longitudinal rolling direction.

45. 发明专利

JP2000282141A MANUFACTURE OF HIGH TENSILE STRENGTH STEEL PRODUCT WITH LOW YIELD RATIO 失效
公开(公告)号：JP2000282141A
公开(公告)日：2000-10-10
申请号：JP9146399
申请日：1999-03-31
申请人： NIPPON KOKAN KK
发明人： SUZUKI SHINICHI , SUWA MINORU , HORIE MASAYUKI
IPC分类号： C21D8/02 , C22C38/00 , C22C38/06 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a method of manufacturing a high tensile strength steel product of low yield ratio, capable of stably giving a low yield ratio without causing reduction in productivity. SOLUTION: A steel slab, having a composition containing, by weight, 0.02-0.18% C, 0.05-0.5% Si, 0.6-1.7% Mn, and =1,000 deg.C. The heated slab is hot rolled at a temperature not lower than the Ar3 transformation point at >=50% cumulative draft. After hot rolling, cooling is performed at a cooling rate of >=2 deg.C/sec from a temperature not lower than the Ar3 transformation point down to a temperature between the Ar3 transformation point and (Ar3 transformation point -100 deg.C). After cooling, 0.5-5% strain is applied at a temperature between the Ar3 transformation point and (Ar3 transformation point -100 deg.C). Then, the steel is air cooled for a time (t) sec satisfying inequality 101-0.006×ΔT

46. 发明专利

JP2000084612A CONTROLLED COOLING METHOD FOR HOT ROLLED STEEL PLATE 失效
公开(公告)号：JP2000084612A
公开(公告)日：2000-03-28
申请号：JP25376898
申请日：1998-09-08
申请人： NIPPON KOKAN KK
发明人： KIBE HIROSHI , FUJIBAYASHI TERUO , HORIE MASAYUKI , KAMIOKA SATOSHI , SUZUKI SHINICHI
IPC分类号： B21B45/02 , C21D1/00 , C21D9/00
摘要： PROBLEM TO BE SOLVED: To obtain a steel plate having good flatness by reducing the temp. unevenness and deformation generated during cooling and then cooling. SOLUTION: The hot rolled steel plate rolled by a rolling mill is cooled by a frontstage cooling device 8, after that cooling is once stopped midway, successively the plate is hot straightened and then is cooled down to a target stop temp. by a poststage cooling device 9. A steel plate temp. in hot straightening is set to the value higher than (Ar3-150) deg.C to that lower than (Ar3-20) deg.C and a steel plate transformation ratio to >=5% to

47. 发明专利

JPH11114626A METHOD FOR STRAIGHTENING SHAPE FOR GIRDER 失效
公开(公告)号：JPH11114626A
公开(公告)日：1999-04-27
申请号：JP27411397
申请日：1997-10-07
申请人： NIPPON KOKAN KK
发明人： HORIE MASAYUKI
IPC分类号： B21D3/05 , B21B1/08 , B21B1/088 , B21D3/14 , E01D1/00 , E01D2/02 , E01D19/00 , E01D101/30
摘要： PROBLEM TO BE SOLVED: To provide a straightening method for shapes for girders for enabling high productivity to be maintained by making the flange angle of the shapes for girders having a special shape into a desired angle and elevating the effects straightening. SOLUTION: A vertical roll 20 having the side shape consisting of the same shape as the outside shape of the shape 1 for girders and a horizontal roll 10 having a side face consisting of the same shape as the inside shape of the flange of the shape 1 for girders are provided on one side of the stand on the poststage side of a roller straightening machine and the lower flange 3 of the shape 1 for girders is pinched with the vertical roll 20 and horizontal roll 10 and the angle is held within the dimensional tolerance.

48. 发明专利

JPH11104702A METHOD OF PRODUCING SHAPE STEEL FOR GIRDLE USE 失效
公开(公告)号：JPH11104702A
公开(公告)日：1999-04-20
申请号：JP27411197
申请日：1997-10-07
申请人： NIPPON KOKAN KK
发明人： HORIE MASAYUKI
IPC分类号： B21B27/02 , B21B1/08 , B21B1/088
摘要： PROBLEM TO BE SOLVED: To provide a method for obtaining a desired tapered flange without expanding a production process and without needing a large investment for process development. SOLUTION: This method, in which an I shape steel 1 to produce the shaped girdle use steel is used composed of a vertical roll 20 at the stand located at the finishing side of a roller adjustor to adjust a shape steel 1. The roll 20 has a side shape in conformity with the external shape of the flange of the shaped steel. This method also has a web press roll 10 at one side, which has a side shape in conformity with the internal shape of the flange of the shaped steel 1. With the vertical roll 20 and web press roll 10, a given angle of a lower flange is obtained.

49. 发明专利

JPH10263618A SHAPE CONTROL METHOD OF PACK ROLLED MATERIAL 失效
公开(公告)号：JPH10263618A
公开(公告)日：1998-10-06
申请号：JP6790797
申请日：1997-03-21
申请人： NIPPON KOKAN KK
发明人： TOMITA SHOGO , HORIE MASAYUKI , KOBAYASHI TAKAYUKI
IPC分类号： B21B3/00 , B21B1/22 , B21B47/00
摘要： PROBLEM TO BE SOLVED: To improve a production efficiency and to reduce a cost, etc., by conducting rolling control so that a pack rolling material crown ratio after/ before rolling is equal to a core plate crown ratio before rolling so as to elimi nate a shape straightening process of annealing, etc., due to the improvement of flatness of a core material. SOLUTION: A plate crown and a plate thickness of a core material 1 are measured from a plate thickness distribution in the core material 1 in the longitudinal direction, a core plate crown ratio before rolling is obtained. Pack rolling is conducted so that change in a pack rolling plate crown ratio before/after rolling is turned to be a plate thickness and a plate crown of a pack rolled material after rolling, which enters in a shape nonsensitive zone of the core material. Where, plate crown is difference between plate thickness at plate width center and at plate end, core material crown ratio is core material crown/ core material plate thickness, pack rolled material crown ratio is plate crown in the part except both end parts of pack rolled material where spacers 3 are inserted/plate thickness in the part except both end ports where the spacers 3 are inserted.

50. 发明专利

JPH10211520A MANUFACTURE OF UOE STEEL TUBE 失效
公开(公告)号：JPH10211520A
公开(公告)日：1998-08-11
申请号：JP1574597
申请日：1997-01-29
申请人： NIPPON KOKAN KK
发明人： MIYAMARU MASASHI , HORIE MASAYUKI
IPC分类号： B21C37/08 , B21D5/01
摘要： PROBLEM TO BE SOLVED: To restrain the generation of peaking with the existing equipment as it is by executing C forming of the steel plate with a C press so that the length of the bending zone in the case of C forming becomes the specified times or more the plate thickness of the steel plate and moreover the length of the straight line part remaining after bending becomes the specified times or less the plate thickness of the steel plate. SOLUTION: C forming ending both end parts in the width direction of the steel plate with the C press is applied, the obtained C formed body is formed with a U press, next the obtained U formed body is O formed with an O press, thereafter the tube is manufacture by welding the butting part of the O formed body. In this case, C forming of the steel plate with the C press is executed under the condition that the length of the bending zone Lc at the time of C forming becomes 3.5 times or more the plate thickness of the steel plate and moreover the length of the zone Lf not yet deformed becomes 1.5 times or less the plate thickness of the steel plate.

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