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1. 发明专利

JP2002045906A METHOD FOR WORKING TEMPER ROLLING ROLL FOR GALVANIZED STEEL SHEET 失效
公开(公告)号：JP2002045906A
公开(公告)日：2002-02-12
申请号：JP2000238165
申请日：2000-08-07
申请人： NIPPON KOKAN KK
发明人： KIMURA YUKIO , UENO MASAYASU , SOTANI YASUHIRO
IPC分类号： B24B5/37 , B21B27/00 , B23H9/04 , B23K15/00 , B23K26/00 , B23K103/04 , B23K103/16 , C23C2/00 , C23C2/06 , C23C2/40
摘要： PROBLEM TO BE SOLVED: To enable reducing the center-line waviness Wca of a roll to be not higher than a certain value even when the center line average roughness Ra of a temper rolling roll is raised without performing mirror finish like a conventional technique in a working method of the temper rolling roll which is especially suitable to the temper rolling of a galvanized steel sheet the center line average roughness Ra of which is 1.0-2.0 μm and the center line waviness Wca of which can be lowered to

2. 发明专利

JP2001321830A METHOD FOR STRAIGHTENING SHAPE OF STEEL STRIP WITH TENSION LEVELER 失效
公开(公告)号：JP2001321830A
公开(公告)日：2001-11-20
申请号：JP2000136586
申请日：2000-05-10
申请人： NIPPON KOKAN KK
发明人： UENO MASAYASU , KIMURA YUKIO
IPC分类号： B21D1/05
摘要： PROBLEM TO BE SOLVED: To provide a straightening method of shape by which high degree of flatness is realized without imparting excessive extension rate even in the case that the elongation which can be imparted to a steel strip has restriction due to material quality in equipment of a tension leveler for performing shape straightening of the steel strip. SOLUTION: In the shape straightening method of the steel strip with the tension leveler in which five or more leveler rolls having independent reduction type or tilting reduction type pushing-in mechanism are arranged zigzag, the elongation ε imparted to a material 1 to be straightened is preliminarily calculated from the inlet-side steepness λ0 of the material 1 to be straightened, the target steepness λ after straightening and function value α(-) by the thickness t of the material 1 to be straightened and the amount δ1 of pushing-in of the leveler roller. Even in the case that the calculated elongation ε is larger than the extension rate εmax which can be imparted to the steel strip 1 from the restriction by the material quality, the shape straightening is performed within the range of the elongation εmax.

3. 发明专利

JP2001038402A METHOD OF MANUFACTURING COLD-ROLLED STEEL SHEET 失效
公开(公告)号：JP2001038402A
公开(公告)日：2001-02-13
申请号：JP21479299
申请日：1999-07-29
申请人： NIPPON KOKAN KK
发明人： NISHIURA NOBUO , SOTANI YASUHIRO , KIMURA YUKIO
IPC分类号： B21B1/22 , B21B13/02 , B21B27/10
摘要： PROBLEM TO BE SOLVED: To provide a method of manufacturing a cold-steel sheet to make it possible to manufacture a steel sheet with uniform surface properties even during high-speed rolling. SOLUTION: Inlet-side coolant headers 5 of the last stand are arranged on the inlet side away from a roll bite position. A memory 11 decides the upper and lower strip coolant flow rates on the basis of the table stored in accordance with the rolling speed determined from the rotating speed measured with a roll tachometer 12 of the last stand and the target surface roughness of the cold-rolled steel sheet, and sends the signal to a valve opening controller 13. The valve opening controller 13 controls the opening of flow control valves 10a and 10b. The flow rate of the lower strip coolant is made higher than that of the upper side, thereby uniformizing the surface roughness of the upper and lower surfaces of the steel sheet. Since the inlet-side coolant header 5 of the last stand is away from the roll bite, this effect is not lost even during high-speed rolling.

4. 发明专利

JP2001025812A MANUFACTURE OF COLD ROLLED STEEL SHEET 失效
公开(公告)号：JP2001025812A
公开(公告)日：2001-01-30
申请号：JP20239799
申请日：1999-07-16
申请人： NIPPON KOKAN KK
发明人： NISHIURA NOBUO , SOTANI YASUHIRO , KIMURA YUKIO
IPC分类号： B21B1/22 , B21B27/10 , B21B33/00 , B21B45/02
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing a flawless cold rolled steel sheet by which occurrence of abnormal thickness and break of the sheet caused by chattering is prevented even when high-speed rolling is executed. SOLUTION: In stand No.5, coolant headers 5 are provided in a position at a distance from roll bite. By processing the vibration of a mill housing 14 detected with a vibrometer 15 with a computing element 16, occurrence of chattering is detected and the flow rate of a strip coolant which is supplied to the coolant headers 5 is increased till the chattering is eliminated. Because the coolant headers 5 are provided in the positions at a distance from the roll bite, phase inversion time of plate-out is secured and the plate-out layer is easy to form. Then, even at the time of high-speed rolling, the friction coefficient is reducible, so it is possible to eliminate the chattering.

5. 发明专利

JPH10128404A DOUBLE REDUCE ROLLING METHOD 失效
公开(公告)号：JPH10128404A
公开(公告)日：1998-05-19
申请号：JP28080896
申请日：1996-10-23
申请人： NIPPON KOKAN KK
发明人： SOTANI YASUHIRO , KIMURA YUKIO , IKEUCHI NAOKI
IPC分类号： B21B45/00 , B21B1/22 , B21B45/02
摘要： PROBLEM TO BE SOLVED: To provide a double reduce rolling method by which the incidence of mottling is stably lowered. SOLUTION: In the double reduce rolling (hereafter, referred to as DR rolling) method by which cold rolling is again applied to a cold rolled steel sheet annealed, an undermentioned condition is satisfied. When the surface temp. of the steel sheet before applying the rolling oil emulsion which is used for the DR rolling is expressed by Ts deg.C, the melting point of the base oil in the rolling oil emulsion by Tm deg.C, the DR rolling method satisfies the formula: Ts>=Tm+10.

6. 发明专利

JPH10128403A DOUBLE REDUCE ROLLING METHOD AND ROLLING DEVICE THEREFOR 失效
公开(公告)号：JPH10128403A
公开(公告)日：1998-05-19
申请号：JP28080796
申请日：1996-10-23
申请人： NIPPON KOKAN KK
发明人： SOTANI YASUHIRO , KIMURA YUKIO , IKEUCHI NAOKI
IPC分类号： B21B45/00 , B21B1/22 , B21B45/02
摘要： PROBLEM TO BE SOLVED: To simply and stably lower the incidence of mottling and to prevent the occurrence of surface defects caused by the smears of fats and oils and rolling-in of foreign matters. SOLUTION: In a double reduce rolling (hereafter, referred to as DR rolling) method by which cold rolling is again applied to an anealed cold rolled steel sheet, the undermentioned conditions are satisfied. (a) Warm water is jetted to the surface of the steel sheet at a jetting pressure of 5kg/cm before applying a rolling oil emulsion which is used for the DR rolling. (b) When the surface temp. of the steel sheet before applying the rolling oil emulsion is expressed by Ts deg.C and the melting point of the base oil in the rolling oil emulsion by Tm deg.C, the formula Ts>=Tm+10 is satisfied.

7. 发明专利

JPH1059679A ROTATIONAL OSCILLATION PREVENTIVE CONTROL METHOD AND DEVICE IN CRANE 失效
公开(公告)号：JPH1059679A
公开(公告)日：1998-03-03
申请号：JP21979496
申请日：1996-08-21
申请人： NIPPON KOKAN KK
发明人： UCHIDA YOSHINORI , MUTA KIYOSHI , AKAGI YASUHIRO , FUJIKAWA YASUTOSHI , KIMURA YUKIO
IPC分类号： B66C13/22
摘要： PROBLEM TO BE SOLVED: To effectively prevent a rotational oscillation when a suspending cargo is rotated in a horizontal plane by a crane by prepreparing a natural vibration period table or a graph on the suspending cargo, and seizing a natural vibration period of rotation corresponding to its suspending cargo when the suspending cargo is designated. SOLUTION: Various data are taken in a rotating speed operation device 19 from an item setting means 18 according to a target angle command from a target angle commanding means 11, and first of all, an operation is performed on the moment of inertia of a snatch block part 1, a lifter part 5 and a coil 6 by an inertia moment operation part 20. Information on coil weight 16 and a wire length 17 is also inputted, and an operation is performed on torsional rigidity of a wire 2 by a wire torsional rigidity operation part 21. An operation is performed on a rotational vibration period of the whole part by totaling a raising-lowering main body part and the coil 6 from these two operation results by a rotational period operation part 22, and next, an operation is performed on a rotating speed pattern by a rotating speed pattern operation part 23, and rotation of a rotary motor in the block part 1 is controlled.

8. 发明专利

JPH09125150A PRODUCTION OF COLD-ROLLED STAINLESS STEEL SHEET EXCELLENT IN SURFACE GLOSSNESS AND APPARATUS THEREFOR 失效
公开(公告)号：JPH09125150A
公开(公告)日：1997-05-13
申请号：JP28964895
申请日：1995-11-08
申请人： NIPPON KOKAN KK
发明人： MASUDA SADAKAZU , MIYAKE MASARU , KIMURA YUKIO , NAKANISHI HARUYUKI , ARIMA KOICHIRO
IPC分类号： B23P13/00 , C21D9/46
摘要： PROBLEM TO BE SOLVED: To provide a producing method of a stainless steel sheet excellent in the surface glossness dissolving cloudy finishing, grayish and gray stripe pattern defect after cold-rolling by a simple process and in a short time, regardless of ferritic, austenitic and the other series stainless steel sheets, and an apparatus therefor. SOLUTION: Any steel sheet of the stainless steel among as hot-rolled steel sheet, self-annealed steel sheet by high temp. coiling after hot-rolling, annealed steel sheet after hot-rolling, annealed and pickled steel sheet after hot-rolling and coiling or steel sheet treated in anneal-pickling line after hot-rolling, is surface-ground and heat-treated and successively, surface-ground and thereafter, cold-rolled. Further, the producing apparatus of the stainless steel excellent in the surface grossness sequentially arranges a surface grinding machine, a grinding liquid squeezing machine, heating device and non-grinding-liquid grinding machine.

9. 发明专利

JPH07185630A CONTROL METHOD FOR HOT ROLLING MACHINE 失效
公开(公告)号：JPH07185630A
公开(公告)日：1995-07-25
申请号：JP33285593
申请日：1993-12-27
申请人： NIPPON KOKAN KK
发明人： SEKINE HIROSHI , HAYASHI YOSHITAKA , KIMURA YUKIO , FUJITA FUMIO
IPC分类号： B21B37/00 , B21B37/18 , B21B37/26 , B21B37/58
摘要： PURPOSE:To obtain a control method for a hot rolling machine capable of changing draft setting only by target thickness and stably changing thickness by performing control by using different kinds of draft control parameters. CONSTITUTION:A controller is constituted of a thickness storage part 10, a change point tracking device 12, a thickness setting change device/gain compensator 14, a smoothing device 16, an abnormality detector 18, and an AGC device by BISRA system. The thickness storage device 10 stores the input/output side thickness target value of materials A, B found by draft schedule calculation, and calculates difference DELTAH, DELTAh. The change point tracking device 12 issues a setting switching timing when a flying thickness change point arrives at each stand. A draft setting correcting operation is started by such timing command. The thickness setting change device 14a starts the adding operation of thickness correction quantity by the input of the setting switching timing. In this way, it is possible to easily control a draft position when the thickness is changed with high accuracy by using the thickness target value calculation result of each stand.

10. 发明专利

JPH06307018A STEEL PLATE AND STEEL STRIP RIDGED AT OPPOSITE SURFACES AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH06307018A
公开(公告)日：1994-11-01
申请号：JP12206193
申请日：1993-04-27
申请人： NIPPON KOKAN KK
发明人： KIMURA YUKIO , MASUDA SADAKAZU
IPC分类号： B21B1/08 , B21B1/22 , B21H8/00 , E04C5/03
摘要： PURPOSE:To enhance the strength of a steel plate and to stabilize and uniform the coupling characteristic of the steel plate with respect to concrete or the like and to enhance the adhesive strength by setting ridges formed on opposite surfaces of a steel plate to be not in parallel with each other between both surfaces thereof. CONSTITUTION:A plurality of ridges 2 which are continuous widthwise of a steel plate are formed at each of opposite surfaces of the steel plate 10, being longitudinal spaces from one another, and the angles of the ridges 2 with respect to the widthwise direction of the steel plate 10 are set so that they are not parallel with each other between the opposite surfaces of the steel plate 10. Further, the height of the ridges 2 is set so as to maintain a steady-state in the longitudinal direction of the steel plate. Upon the manufacture of such a steel plate or a steel strip ridged at opposite surfaces thereof, steel is rolled by work rolls 1, 1 having gullivers 3 which are arranged so that the angles of the ridges 2 with respect to the widthwise direction of the steel plate 10 are set in such a way that the ridges are not in parallel with each other between the opposite surfaces thereof.

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