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31. 发明专利

JP2000176517A ROLLING MILL AND ROLLING METHOD 失效
公开(公告)号：JP2000176517A
公开(公告)日：2000-06-27
申请号：JP36213298
申请日：1998-12-21
申请人： HITACHI LTD
发明人： NARITA KENJIRO , NIHEI MITSUO , SAITO TAKEHIKO , NIIMURA TOSHIYASU , KAGA SHINICHI , KAMOSHITA TAKASHI
IPC分类号： B21B13/14 , B21B27/10 , B21B28/04 , B24B5/37 , B24B49/00
摘要： PROBLEM TO BE SOLVED: To secure homogenous thickness distribution and to obtain a metal plate excellent in quality by providing a grinding instructing device for sending the instruction of grinding to a grinding device at the point of time when at least one of the measured value and estimated value of the profile of a work roll reaches an arbitrary value. SOLUTION: A rolling stand 5 is provided with a pair of the work rolls 2 and a pair of back-up rolls 3, the work rolls 2 are composed so as to be respectively movable in the axial direction and grinding devices 6 with which the surfaces of the work rolls 2 can be ground are provided. The grinding device 6 is movable in the axial direction on a base 7 for moving and, by moving in the axial direction and bringing into contact with the surface of the work roll 2, in the non-contact region of the work roll 2 on the outside of the width on the barrel of the work roll 2, to region where is brought into contact with the metal plate at least in the rolling on and after that, or the region on the outside of that and furthermore the whole region, can grind. The work rolls 2 are moved oppositely each other in the axial direction. In this way, a gentle worn profile similar to a thermal expansion profile on which end-part peak wear is not generated is obtained.

32. 发明专利

JP2000015313A ROLLING MILL AND ROLLING METHOD 失效
公开(公告)号：JP2000015313A
公开(公告)日：2000-01-18
申请号：JP18772498
申请日：1998-07-02
申请人： HITACHI LTD
发明人： NARITA KENJIRO , NIHEI MITSUO , YASUDA KENICHI , SAITO TAKEHIKO , HIRAMA YUKIO , SATO KOJI
IPC分类号： B21B1/22 , B21B13/02 , B21B13/14 , B21B37/00 , B21B37/28
摘要： PROBLEM TO BE SOLVED: To sufficiently reduce an axial thrust force generated in a small diameter working roll by detecting the thrust force in the axial direction of the working roll, controlling a working roll inclining means so that this detected value becomes a prescribed limited value or below and controlling a bending means for working roll according to this control. SOLUTION: The crossing angle θ of the working roll 2 is adjusted in the area, where the relative angle θ between the working roll 2 and an intermediate roll 3 does not become fine, and the thrust force Fp generated between the plate material and the working roll 2 is adjusted. In this way, only the thrust force Fp between the plate material and the working roll 2 is changed in the condition of scarcely changing the thrust force Fr generated between the working roll 2 and the intermediate roll 3, and this thrust force Fp is always made to the almost same as the thrust force Fr generated between the working roll 2 and the intermediate roll 3 and these thrust forces can be cancelled. Therefore, the thrust force Fs generated in the working roll 2 is sufficiently reduced and the working roll can be minimized.

33. 发明专利

JPH11147103A ROLLING MILL AND ROLLING METHOD 失效
公开(公告)号：JPH11147103A
公开(公告)日：1999-06-02
申请号：JP31482297
申请日：1997-11-17
申请人： HITACHI LTD
发明人： HIRANO SATOSHI , NARITA KENJIRO , SAITO TAKEHIKO
IPC分类号： B21B27/10 , B21B1/22 , B21B13/14 , B21B31/16
摘要： PROBLEM TO BE SOLVED: To obtain a rolling method with high reliability by installing a pair of intermediate rolls and back-up rolls in a twisted position each other, installing axes of the intermediate roll and the back-up roll in an upper roll group and a lower roll group in parallel with each other, inclining an axis of work rolls in a pair and the axes of the intermediate roll and the back-up roll in opposite directions each other on a horizontal plane, and supplying one of the surfaces of the rolls with lubricant. SOLUTION: Axial thrust force is produced on the contact surface between intermediate rolls 3a, 3b and work rolls 2a, 2b by crossing the work rolls 2a, 2b. However, the thrust force is reduced because lubricant sprayed on the roll surfaces of the intermediate rolls 3a, 3b with a lubricant feeder is adhered to each surface of the intermediate rolls 3a, 3b, back-up rolls 4a, 4b and, the work rolls 2a, 2b, and supplied to the contact surfaces between the work rolls 2a, 2b and the intermediate rolls 3a, 3b by contact between the rolls.

34. 发明专利

JPH10137833A STRIP COOLING EQUIPMENT FOR ROLLING MILL AND STRIP COOLING METHOD 失效
公开(公告)号：JPH10137833A
公开(公告)日：1998-05-26
申请号：JP29481296
申请日：1996-11-07
申请人： HITACHI LTD
发明人： SHIINA KOJI , NARITA KENJIRO , NIHEI MITSUO , TAKAKURA YOSHIO , MIZUSHINA YASUO
IPC分类号： B21B45/02 , C21D9/52 , C21D9/573
摘要： PROBLEM TO BE SOLVED: To uniformize cooling in the vertical direction and the temperature distribution in the width direction of a strip by providing with an opening pad having a slit nozzle for cooling the lower part of the strip and setting the gap between the lower surface of the strop and the pad in accordance with the dimension of the slit nozzle. SOLUTION: A laminar flow cooling system is used for the upper part of the strip stock 1, a laminar flow water is made to flow downward from a laminar flow pipe 7a, and the liquid film H is more widely spread in the longitudinal direction in the downstream side than the upstream side because of the strip stock 1 moving at a high speed. An opening pad cooling system is used in the lower part of the strip stock 1, a lower part opening pad mechanism 5 is arranged between two guide rolls 9, and the cooling water is fed from a cooling header 15a via a water feeding duct 10a. The cooling water is fully filled within a cooling water gap 16 from the nozzle mechanism 5a and made to flow in the vertical direction of the strip stock, and drained to a cooling water pit from a drain pipe 11b via a drain duct 11a. By this way, cooling is promoted with the direct contact between the sprayed water and the strip, and the temperature distribution in the vertical direction and width direction of the strip stock is uniformized.

35. 发明专利

JPH1094809A ROLLING METHOD FOR ROLLING MILL AND ROLLING MILL 失效
公开(公告)号：JPH1094809A
公开(公告)日：1998-04-14
申请号：JP25280796
申请日：1996-09-25
申请人： HITACHI LTD , NIPPON LIGHT METAL CO
发明人： NARITA KENJIRO , NIHEI MITSUO , HIRAMA YUKIO , SATO KOJI , TAKAKURA YOSHIO , HORII KENJI , KONDO SHIGETOSHI , SUZUKI KAZUYOSHI , FURUTA TASUKU
IPC分类号： B21B3/00 , B21B1/22 , B21B27/10 , B21B28/04 , B21C51/00
摘要： PROBLEM TO BE SOLVED: To hold the appropriate thickness of roll coating by grinding by immidicately detecting its change even when the thickness of the roll coating is suddenly changed by a cause of some kind during rolling. SOLUTION: The coefficient of friction between upper and lower work rolls 2, 2a is calculated from the sum load and preset rolling conditions with an arithmetic unit 81 of the coefficient of friction. When the calculated value μc is over the set value μd, it is judged that the thickness of roll coating is over the optimum thickness with an arithmetic unit 82 for comparing cross axes angles and, excepting during grinding the roll coating by this control, by setting the upper and lower work rolls 2, 2a to a prescribed crossed axes angle, relative slip is made to generate between the upper and lower work rolls 2, 2a and upper and lower back-up rolls 3, 3a and the roll coating is gourd. In this way, even when the thickness of the roll coating is suddenly increased by the cause of some kind during rolling, the roll coating is immediately ground by the change of the calculated value μc, so the proper thickness of the roll coating is held.

36. 发明专利

JPH08311564A DEVICE FOR CONTROLLING COOLING FOR ROLLING MILL 失效
公开(公告)号：JPH08311564A
公开(公告)日：1996-11-26
申请号：JP11422695
申请日：1995-05-12
申请人： HITACHI LTD
发明人： SHIINA KOJI , MIZUSHINA YASUO , NARITA KENJIRO
IPC分类号： B21B45/02 , C21D1/00 , C21D1/04 , C21D9/52
摘要： PURPOSE: To secure the long service life and the high quality of a strip by arranging ultrasonic generating mechanism downward in a cooling device of the strip for a rolling mill, uniformizing the temp. distribution in the width direction of the strip and improving the cooling velocity in the longitudinal direction. CONSTITUTION: At the time of cooling the rolled strip 1 by passing through the cooling device and flowing down cooling water A from nozzles 3 of round headers 2a for cooling the upper part, the ultrasonic generating mechanism 4 are arranged downward to the header 2a. The temp. and the shape of the rolled strip 1 are detected with detectors 8a, 8b arranged at the inlet side and the outlet side of this cooling device and these distributing informations in the width direction of the strip are transferred to a computing element 5 and the correcting values for uniformizing the temp. are set with a correcting computing element 6 and transferred to control devices 7. The control device 7 controls the output, frequency, amplitude, etc., in the ultrasonic generating mechanism 4 based on these values, and film boiling of the rolled strip 1 is collapsed, and the temp. distribution in the width direction of the rolled strip 1 is uniformized and the cooling velocity is improved.

37. 发明专利

JPH08309406A CONTINUOUS CASTING DIRECT-COUPLED HOT ROLLING SYSTEM 失效
公开(公告)号：JPH08309406A
公开(公告)日：1996-11-26
申请号：JP11546295
申请日：1995-05-15
申请人： HITACHI LTD
发明人： SHIINA KOJI , TAKAHASHI SHIRO , MORI HIDEAKI , NARITA KENJIRO , YASUDA KENICHI
IPC分类号： B21B9/00 , B21B1/00 , B21B1/46 , B21B45/00 , B21B45/02 , B22D11/12 , C23F15/00
摘要： PURPOSE: To improve the quality of a strip material, and to attain a continuous casting direct-coupled hot rolling system with high safety and reliability by installing the filling mechanism of inert gas between the continuous casting of a minihot system and a rolling process. CONSTITUTION: A molten slab 3 supplied from a tundish 1 is indirectly solidified and cast by cooling water A in a mold 5. A slab 6 with its surface solidified and with its inside molten is annealed with mist spray water B by many spray nozzles 8 installed at the outlet end of the mold 5. The slab 6 is transferred to a rolling side by many guide rolls 7. And, the temperature of the slab 6 cooled too much in the next process is raised by an induction heating apparatus 9a, and a first stage rolling is performed by rough rolling rolls 11. An inert gas filling mechanism 16 covering the whole of slab 6, guide rolls 7 and spray nozzles 8, is installed in a generating process from the outlet of the mold 5 to the induction heating apparatus 9a, and inert gas C is filled or supplied from the inflow port 16a of the filling mechanism.

38. 发明专利

JPH0890044A COOLING DEVICE FOR ROLLING MILL 失效
公开(公告)号：JPH0890044A
公开(公告)日：1996-04-09
申请号：JP22945894
申请日：1994-09-26
申请人： HITACHI LTD
发明人： SHIINA KOJI , NARITA KENJIRO , YASUDA KENICHI , MORI HIDEAKI , HIRAMA YUKIO , MIZUSHINA YASUO , TAKAKURA YOSHIO
IPC分类号： B21B27/10 , B21B45/02 , C21D1/04 , C21D9/52
摘要： PURPOSE: To improve cooling performance by executing strip cooling with use of heat transfer promoting action by ultrasonic wave so as to aim for improvement of cooling speed in the longitudinal direction and uniform cooling in the strip width direction in the strip cooling mechanism of rolling system. CONSTITUTION: The temp./shape distribution information from a detector 115b at the outlet side of a rolling mill 130 and a detector 115c at the downstream side of a strip cooling mechanism 160 is transmitted to a correcting value computing element 113 through a computing element 112, the correcting value to make temp. distribution uniform is set. Based on this, a controller 114 generates the control signal to control a frequency of ultrasonic wave (f) generated by an ultrasonic wave generating mechanism 116, voltage E, amplitude δ, etc., and the control signal is transmitted to the ultrasonic wave generating mechanism 116 arranged at both ends of a header 107 for cooling upper part of strip cooling water introducing part 160a, the cooling control in the longitudinal direction of a strip 101A and uniform cooling in the width direction are executed. Further, as to a roll cooling mechanism, the temp. distribution in the roll axis direction is made uniform in the same way.

39. 发明专利

JPH05329520A METHOD AND DEVICE FOR CONTROLLING ROLLING MILL 失效
公开(公告)号：JPH05329520A
公开(公告)日：1993-12-14
申请号：JP16202392
申请日：1992-05-28
申请人： HITACHI LTD , NISSHIN STEEL CO LTD
发明人： SAKAI BUNJI , KUNII SHIGEKI , NARITA KENJIRO , NAGAI HIDEAKI , NAKAZONO EIJI , WATANABE TSUTOMU , ITO TAKESHI
IPC分类号： B21B37/00 , B21B37/38 , B21B38/02
摘要： PURPOSE:To receive rolling information regarding the operational pattern of roll coolant (cooling water) and the wear of a reinforcing roll and to improve the control precision of a plate crown in a four high or six high mill having work rolls and reinforcing rolls. CONSTITUTION:A calculator 24 to calculate the quantity of thermal expansion of each operational roll and a calculator 25 to calculate the wear of each reinforcing roll receive an operational pattern for roll coolant (cooling water) outputted from a setting bank 22 and a transmitting device 23 for a timing command and a rolling information, setting and rolling information regarding the wear of the reinforcing roll. An estimating operation for the roll profile is performed based on the setting and the rolling information in these calculators and a new roll bending force is set to control the plate crown to remove a plate crown deviation caused by a predicted error by a predicted value of the roll profile obtained by this calculation and an actual roll profile when the following material to be rolled is rolled.

40. 发明专利

JPH0523706A METHOD AND EQUIPMENT FOR JOINING HOT METAL PLATE AND ROLLING METHOD 失效
公开(公告)号：JPH0523706A
公开(公告)日：1993-02-02
申请号：JP17412491
申请日：1991-07-15
申请人： HITACHI LTD
发明人： NARITA KENJIRO , YASUDA KENICHI , SATO KOJI , HIRAMA YUKIO , KONOSE RYOHEI
IPC分类号： B21B1/26 , B21B15/00 , B23K20/00 , G01N3/00 , G01N19/04 , G01N33/20
摘要： PURPOSE:To prevent breaking of hot metal plate at rolling stage after joining hot metal plates and to enable continuous rolling in a method and equipment for joining the hot metal plates. CONSTITUTION:A joining equipment 58 for hot metal plate is arranged at a pre-stage of a group of roughing mills 53 or finishing mills 54. In the joining equipment, the rear end of a preceding metal plate 1 and the tip of the following metal plate 2 are joined with a joining device 3 and, after that, the joined part 4 is led to a strength test device 5 together with the metal plates and the strength test for the joined part 4 is executed. In the case the strength in the joined part 4 is insufficient by this strength test, the joined part 4 is cut off and only the hot metal plate with sufficient strength in the joined part is sent to the rolling stage. In this way, breaking in the joined part at the rolling stage is prevented and continuous rolling with which efficiency of operation is drastically improved is made possible.

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