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1. 发明专利

JPS56134001A HOT ROUGHING METHOD FOR SLAB 失效
公开(公告)号：JPS56134001A
公开(公告)日：1981-10-20
申请号：JP3578080
申请日：1980-03-22
申请人： NIPPON KOKAN KK
发明人： OKADO TSUYOSHI , ARIIZUMI TAKASHI
IPC分类号： B21B1/02 , B21B1/04 , B21B1/26 , B21B13/10
摘要： PURPOSE:To effectively reduce the amount of crop loss to be generated in the top and the bottom of slab, by giving a rolling reduction to the slab with a roll group comprising a couple of vertical rolls and a couple of horizontal rolls whose roll axes are arranged in the same plane, before feeding the slab to the final roughing pass. CONSTITUTION:The universal rolling mill 14 is installed in the same line as the hot roughing mill 7, and comprises a couple of vertical rolls 15 and a couple of horizontal rolls 16 arranged between these vertical rolls 15; hereupon, the roll axes of the vertical rolls 15 and the horizontal rolls 16 are arranged in the same plane perpendicular to the slab 6. A slab 6 is heated by the heating furnace 5 to prescribed temperatures and is fed to the universal rolling mill 14 in which the slab 6 receives a rolling reduction by the vertical rolls 15 and the horizontal rolls 16 in the directions of thickness and breadth at the same time; thereafter the slab 6 is roughed by the roughing mill 7. In the present method, it is desirable to install the universal mill 14 on the upstream side of the hot roughing mill 7 so far as circumstances permit.

2. 发明专利

JPS5575802A HOT ROLLING METHOD 失效
公开(公告)号：JPS5575802A
公开(公告)日：1980-06-07
申请号：JP14969878
申请日：1978-12-05
申请人： NIPPON KOKAN KK
发明人： OKADO TSUYOSHI , ARIIZUMI TAKASHI , TOMITA SHIYOUGO
IPC分类号： B21B1/22 , B21B1/26
摘要： PURPOSE:To diminish the edge drop and to improve the product quality, by installing at least a couple of vertical rolls on the inlet side of the finishing mill, and by rolling the material with vertical rolls according to the specified mathod, at hot rolling the material. CONSTITUTION:The vertical reducing rolls 3a, 3b, for rolling the material 4 in the direction of breadth, and the work rolls 2a, 2b, of the finishing mill for rolling the material in the horizontal direction just following to the vertical rolls 3a, 3b, are arranged; hereupon, rolls 3a, 3b, are previously adjusted so as to make their rolling reduction to be 1/2 or less of thickness of material 4 on the inlet side. Hereby, the material 4 with the sectional profile like as the full line A, is rolled in the direction of breadth; and the both edges of material 4 are protruded upward and downward as shown by the full line B; and then, the material 4 is rolled with the work rolls 2a, 2b, into the product with good parallelism as shown by the chain line C. As a result, the finished product of excellent quality with extremely small edge drop can be obtained.

3. 发明专利

JPS54162665A SPIRALLY WELDED PIPE FORMING MACHINE 失效
公开(公告)号：JPS54162665A
公开(公告)日：1979-12-24
申请号：JP7072278
申请日：1978-06-14
申请人： NIPPON KOKAN KK
发明人： OKADO TSUYOSHI , MIHARA YUTAKA , SHIYUDOU TOMOSHIGE
IPC分类号： B21C37/12
摘要： PURPOSE:To smoothly manufacture the spirally welded pipe with superior shape and quality together with, by additional installing the rolling reduction adjuster in the pinch roller for feeding the material into the forming machine, and by operating this adjuster for adjusting the rolling reduction depending on the detected value obtained from the camber detector. CONSTITUTION:The material coil 22 is fed in the arrowed direction to the forming machine; the detector equipped with the detecting parts 8 facing to both edges of the coil 22, is installed; the optical light projector and the photodetector are arranged at three stages along the traveling direction of the coil; the amount of camber of the traveling coil is detected; this amount of camber is inputted to the control board 4 which then adjusts the rolling reduction of the rolls 14, 14. Concerning the relation between this camber and the adjustment of rolling reduction, a correlation in case of thickness 10mm and breadth 2m, for an example, is previously examined; and correspondingly to the coil's traveling speed and the detected amount of camber, the rolling reduction for either one of the left or right sides, is adjusted, when the coil with the detected camber passes through the rolls 14, 14.

4. 发明专利

JPS5378961A HOT ROLLED STEEL PLATE MANUFACTURING PROCESS 失效
公开(公告)号：JPS5378961A
公开(公告)日：1978-07-12
申请号：JP15414876
申请日：1976-12-23
申请人： NIPPON KOKAN KK
发明人： KUNIOKA KAZUO , OKADO TSUYOSHI , SUGIYAMA SHIYUNICHI , KAMIO HIROSHI
IPC分类号： B21B1/26 , B21B45/02 , C21D1/00 , C21D9/52

5. 发明专利

JPS56148402A HOT ROUGHING METHOD FOR SLAB 失效
公开(公告)号：JPS56148402A
公开(公告)日：1981-11-17
申请号：JP5177580
申请日：1980-04-21
申请人： NIPPON KOKAN KK
发明人： OKADO TSUYOSHI , ARIIZUMI TAKASHI
IPC分类号： B21B1/26 , B21B1/22 , B21B27/02
摘要： PURPOSE:To obtain spread proportional to the rolling reduction, by installing a couple of locally reducing rolls movable in the direction of the roll axis, within a hot roughing mill train. CONSTITUTION:The said locally reducing roll 11 is constituted so as to satisfy the equation I. In the equation I, SIGMAW1 defines the total sum of the breadth W1 of the tip of the locally reducing roll 11, and SIGMAW2 defines the total sum of the breadth W2 of the middle part of the locally reducing roll 11. A couple of locally reducing rolls 11 are made movable in the direction of their axes relatively to their driving rotary shafts 12. With the exception of the final rolling stand of the hot roughing mill train, each of the upstream stands is provided with at least one of the said locally reducing roll couple 11; thus arranged hot roughing mill train is operated to carry out a broardside rolling pass for a slab 6 while the rolling reduction is adjusted.

6. 发明专利

JPS55117503A ROUGH ROLLING METHOD IN HOT ROLLING 失效
公开(公告)号：JPS55117503A
公开(公告)日：1980-09-09
申请号：JP2504379
申请日：1979-03-06
申请人： NIPPON KOKAN KK
发明人： OKADO TSUYOSHI , ARIIZUMI TAKASHI
IPC分类号： B21B1/26 , B21B1/22 , B21B37/00
摘要： PURPOSE:To reduce the insufficiency of breadth generated in the front and rear ends of the steel sheet, by adjusting the rolling reduction of the vertical mill in the roughing mill train, so as to give a light reduction in the former stage of the mill train, and to give a heavy reduction in the latter stage of the mill train. CONSTITUTION:In case of rolling the steel sheet by the hot rolling mill, the rolling reduction by the vertical mill in the roughing mill train is adjusted so as to give a light reduction by the former stage of the mill train, and to give a heavy reduction by the latter stage of the mill train; hereby, the breadth defective portion at the front and rear ends of the coil, caused due to the metal flow at performing the edging work by the vertical mill in the roughing stage of the hot strip mill, can be greatly reduced. As a result, the yield of the rolling work of the hot strip mill can be improved.

7. 发明专利

JPS5568102A WIDENING METHOD FOR BREADTH OF CAST BILLET IN CONTINUOUS CASTING WORK 失效
公开(公告)号：JPS5568102A
公开(公告)日：1980-05-22
申请号：JP13942778
申请日：1978-11-14
申请人： NIPPON KOKAN KK
发明人： OKADO TSUYOSHI , ARIIZUMI TAKASHI
IPC分类号： B22D11/128 , B21B1/46
摘要： PURPOSE:To impose the local rolling reduction in order to widen the breadth, by forming a ring type protuberance at a specified place in the outer circumference of the roll drum. CONSTITUTION:The rolling mill 5 consists of the locally reducing rolling stand 5a provided with a couple of rolls in which the ring type protuberance is formed at a specified place of the outer circumference of the roll drum, and the following two ordinary rolling stands 5b provided with a couple of rolls possessing flat drums. The locally reducing rolling stand 5a is equipped with the rolling reduction adjuster 9, by which the thickness of the cast billet passing through the gap between upper and lower rolls 7, 8, is changed and the rolling reduction is adjusted. If the cast billet 2 is rolled for a specified rolling reduction with the locally reducing rolling stand 5a, the cast billet 2 undergoes a local reduction due to the ring type protuberances 10 of upper and lower rolls 7, 8; hereby, the metal of the reduced part flows in the direction of breadth, and the breadth is widened correspondingly to the rolling reduction.

8. 发明专利

JPS5550904A MANUFACTURE OF COLD ROLLED STEEL SHEET OF HIGH LANKFORD VALUE 失效
公开(公告)号：JPS5550904A
公开(公告)日：1980-04-14
申请号：JP12464178
申请日：1978-10-12
申请人： NIPPON KOKAN KK
发明人： HOSOYA YOSHIHIRO , NISHIMOTO AKIHIKO , FUJITA FUMIO , OKADO TSUYOSHI
IPC分类号： B21B1/22 , C21D1/26 , C21D8/04 , C21D9/48
摘要： PURPOSE:To efficiently manufacture titled steel sheet, by executing the cold rolling with the high draft percentage and a specified diferential peripheral speed rolling rate, followed by annealing pass at temperatures above the recrystallization point. CONSTITUTION:At manufacturing the cold rolled steel sheet by the cold rolling facilities, the draft percentage is specified above 65%, and the differential speed rolling is executed under the condition to satisfy the formula I (in which, n is the number of rolling passes, V1 is the peripheral speed of rolls at upper stage, V2 is the peripheral speed of rolls at lower stage, and + means the normal rolling period and - means the reverse rolling period). After that, the annealing is executed at temperatures above the recrystallization point; hereby, the cold rolled steel sheet of high Lankford value (r-value) or of high mean value of Lankford values in the rolling direction, and of superior deep-drawability, is surely manufactured. Besides, the restrictive condition for both of hot rolling work and cold rolling work is moderated.

9. 发明专利

JPS57187101A ROLLING METHOD FOR REDUCING EDGE DROP IN HOT ROLLING 失效
公开(公告)号：JPS57187101A
公开(公告)日：1982-11-17
申请号：JP7064381
申请日：1981-05-13
申请人： NIPPON KOKAN KK
发明人： OKADO TSUYOSHI , TOMITA SHIYOUGO , YABUUCHI TOSHIFUMI , SHIBAYAMA YUTAKA , NOMA YOSHINOSUKE
IPC分类号： B21B1/26 , B21B1/22
摘要： PURPOSE:To reduce edge drops and center crowns by increasing the plate thicknesses in both broadside end parts of a material to be rolled in accordance with specific conditions on the upper stream than the final stand of hot finishing stages then screwing down both end parts gradually. CONSTITUTION:Plate thickness increasing parts are so formed as to increase the thicknesses in the broadside thickness parts of a material to be rolled in the plate end parts on the upper stream than the final stand of hot finishing stages, and this material is flat rolled in the subsequent passes. Here, the thickness increasing in the plate end parts is so limited as to satisfy the equationI(H: the thickness in the central part of the material to be rolled, B: the width of the material to be rolled, the difference between the thickness in the end parts and the thickness in the central parts, that is, the height of the thickness increased part alpha, W: the width of the thickness increased part alpha, S: WXh, that is, the sectional area of the thickness increased part alpha). According to this method, not only edge drops are reduced effectively, but also center crowns are reduced.

10. 发明专利

JPS54138813A MANUFACTURE OF STEEL PLATE WITH LITTLE ANISOTROPY IN LANKFORD VALUE 失效
公开(公告)号：JPS54138813A
公开(公告)日：1979-10-27
申请号：JP4665878
申请日：1978-04-21
申请人： NIPPON KOKAN KK
发明人： FUJITA FUMIO , HOSOYA YOSHIHIRO , OKADO TSUYOSHI , ARAKI KENJI
IPC分类号： C21D9/48 , C21D8/02 , C21D8/04
摘要： PURPOSE:To manufacture a steel plate with little anisotropy in Lankford value by subjecting a steel plate in a cold rolling process to different peripheral speed rolling under specific conditions at a reduction ratio above 30%, followed by annealing at above the recrystallization temp. CONSTITUTION:In manufacture of a steel plate with a cold rolling mill, different peripheral speed rolling is carried out in part or all of several passes under conditions satisfying formula I at a reduction ratio above 30%. The rolled plate is then annealed at above the recrystallization temp. to manufacture a steel plate with little anisotropy in Lankford value. The different peripheral speed rolling is performed with a single step rolling mill or a tandem rolling mill by driving upper and lower rolls of the same size at different no. of rotations or driving one roll and idling the other roll. Upper and lower rolls of different size may be driven at the same or different no. of rotations, or one roll may be driven and the other roll idled.

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