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51. 发明专利

JPH01178306A METHOD AND DEVICE FOR ROLLING 失效
公开(公告)号：JPH01178306A
公开(公告)日：1989-07-14
申请号：JP120688
申请日：1988-01-08
申请人： HITACHI LTD
发明人： YASUDA KENICHI , HIRAMA YUKIO , SATO KOJI
IPC分类号： B21B37/00
摘要： PURPOSE:To improve the productivity and yield of products by detecting a wear amount of moving rolls and correcting an axial position of the moving rolls based on the wear amount. CONSTITUTION:A sheet thickness gage 8 and a distance gage 10 are installed on the outlet side of a rolling mill having moving rolls 4, 5 and a roll wear amount calculator 14 and a deviation amount from the reference line calculator 15 are also installed. The total coil weight from a previous changing moment of the rolls 4, 5 is calculated by a calculator 11, the calculator 14 calculates a roll wear amount (m). Then, a deviation amount (q) from the reference line calculated by the calculator 15 is inputted to a roll position commanding device 16 to correct a set roll position deltaa and to change a roll position by use of roll moving devices 17, 18. Hence, shape defects of a product caused by roll wearing is positively prevented. Therefore, the productivity and yield of the product are improved.

52. 发明专利

JPS63224808A HERRING BONE CORRECTING METHOD 失效
公开(公告)号：JPS63224808A
公开(公告)日：1988-09-19
申请号：JP5660787
申请日：1987-03-13
申请人： HITACHI LTD
发明人： YASUDA KENICHI , HIRAMA YUKIO , SATO KOJI
IPC分类号： B21B1/22 , B21B37/00
摘要： PURPOSE:To stabilize rolling and to improve the rolling yield by detecting the herring bone of a rolled stock at the outlet side of a rolling mill and controlling the outlet side flowing angle of the rolled stock. CONSTITUTION:A herring bone detector 11 is provided at the outlet side of the rolling mill equipped with work rolls 2, 3 and a deflector roll 1 capable of adjusting the height position and deflector roll position detector 14 are respectively arranged. In the case of rolling a rolling material 1, an aligning screw 18 is adjusted with watching the output of the detector 14 by a roll height adjuster 17 when the herring bone detector 11 detects the herring bone generation of the material 1 and the height position of a deflector roll 10 is controlled to adequately adjust the outlet port flowing angle theta of the material 1. Owing to the herring bone being corrected by the adjustment of the angle theta, the rolling is stabilized and the rolling yield is improved due to the rolling quality being improved.

53. 发明专利

JPS6238703A TANDEM SHEET MATERIAL ROLLING MILL 失效
公开(公告)号：JPS6238703A
公开(公告)日：1987-02-19
申请号：JP17753585
申请日：1985-08-14
申请人： HITACHI LTD
发明人： YASUDA KENICHI , HIRAMA YUKIO , SATO KOJI
IPC分类号： B21B1/24 , B21B27/00
摘要： PURPOSE:To provide the satisfactory power to improve the edge drop which ceramic rolls possess with a small investment by using the ceramic work rolls to the stands except the final stand of a tandem sheet material rolling mill. CONSTITUTION:The 1st and final stands 1, 5 of a 5-stands tandem rolling mill consisting of, for example, rolling mills 1-5 are the new type 6-stage rolling mill having axially movable intermediate rolls. The ceramic rolls 6, 7 are used for the stand 4. Since the small-diameter work rolls can be used in the stands 1, 5, the high-draft rolling reduction can be executed and the shape controllability is excellent. The rolling reduction is thereupon executed at the highest possible draft to a material 8 in the stand 1 and the rolling is executed in the conventional manner in the stands 2, 3. The edge drop is improved by rolls 6, 7 in the stand 4. Finally the material is subjected to again the low-draft rolling reduction in the stand 5 to prevent the increase of the edge drop.

54. 发明专利

JPS61219410A METHOD AND DEVICE FOR CONTROLLING HERRINGBONE IN SHEET-STOCK ROLLING MILL 失效
公开(公告)号：JPS61219410A
公开(公告)日：1986-09-29
申请号：JP6073385
申请日：1985-03-27
申请人： HITACHI LTD
发明人： YASUDA KENICHI , HIRAMA YUKIO , SATO KOJI , AWATSUHARA HIROSHI , NARITA KENJIRO , TAKEUCHI MAMORU
IPC分类号： B21B37/28 , B21B37/00 , B21B38/02
摘要： PURPOSE:To improve the yield of product as well as the productivity in a rolling line by eliminating the following correcting stage, by calculating and controlling a tension value at the inlet or outlet side of a mill in accordance with the generating degree of herringbone detected at the outlet side of the mill. CONSTITUTION:A herringbone detector 10 provided to the outlet side of a mill, detects a herringbone generated in the surface of a stock 1. A computing unit 11 fetches a detection signal of detector 10, to calculate and output an increment of outlet-side tension, to be provided to the stock 1 when the herringbone generates too much. A computing unit 12 outputs a new outlet-side tension value obtained by adding the increment to a present outlet-side tension value acting on the stock 1, measured by a tension meter 13 provided to the outlet side of the mill. As the sheet thickness of stock 1 decreases when the outlet-side tension increases too much, the inlet-side tension is controlled at the same time. In this way, the generation of herringbone is effectively prevented, and the yield of product is improved.

55. 发明专利

JPS61154708A METHOD AND DEVICE FOR ESTIMATING THERMAL CROWN OF WORK ROLL 失效
公开(公告)号：JPS61154708A
公开(公告)日：1986-07-14
申请号：JP28160784
申请日：1984-12-27
申请人： HITACHI LTD
发明人： YASUDA KENICHI , NARITA KENJIRO , HIRAMA YUKIO , SATO KOJI
IPC分类号： B21B37/00 , B21B37/32
摘要： PURPOSE:To control a roll pressure in the width direction of a rolling sheet and to uniform its thickness in the width direction by providing thermometers to the central part and both end-parts of an upper work roll and operating the parameters, expressing the thermal crown of work roll under the conditions of those temperature differences and whether the sheet is under rolling or not, in case of rolling a steel sheet, etc. CONSTITUTION:A rolling stock 10 such as a steel sheet, is rolled by work rolls 12, 14 provided with intermediate rolls 24, 26 and backup rolls 28, 30. In this case, non- contact thermometers 18, 20, 22 are provided to both end-parts and the central part of the roll 12 to measure the temperatures of said parts, and the results are inputted to an average-value operator 38 and a temp.-difference computing element 40 to detect whether the stock 10 is under rolling or not at the same time by a rolling detector 58, then the parameters, expressing the thermal crown profiles of rolls 12, 14, are operated by a computing element 56 based on said measured conditions. From the operated results, the differences of the thermal crown quantities at respective points, 0.538B, 0.8B, 0.906B, when the width of stock 10 is represented by 2B, are controlled into specific values, to uniform the thickness in the width direction of rolling stock 10.

56. 发明专利

JPS58141808A METHOD AND APPRATUS FOR CONTROLLING SHEET THICKNESS IN ROLLING MILL 失效
公开(公告)号：JPS58141808A
公开(公告)日：1983-08-23
申请号：JP2447882
申请日：1982-02-19
申请人： HITACHI LTD
发明人： YASUDA KENICHI
IPC分类号： B21B37/42 , B21B13/02 , B21B13/14 , B21B37/00 , B21B37/18 , B21B37/38 , B21B37/64
摘要： PURPOSE:To improve the accuracy of sheet thickness in the longitudinal and width directions, by preventing the influence of bending force affecting in the accuracy of sheet thickness in the longitudinal direction from the change caused by the movement of rolls, in a rolling mill equipped with rolls movable in the axial directions, too. CONSTITUTION:A material to be rolled is rolled by a rolling mill consisting of work rolls 2 and 3, intermediate rolls 4 and 5 movable in the axial directions, and back-up rolls 6 and 7. A whole rolling load by a load cell 8, a work roll bending force added by jacks 9 by a load cell 10, and further, a bending force of intermediate rolls by a load cell 14 are detected respectively. The positions of intermediate rolls 4 and 5 are obtained by an arithmetic device 17 basing on the signals of detectors 15 and 16 to output them to an arithmetic device 18, and the coefficient of rigidity of each mill is calculated basing on the distance between the end parts of intermediates rolls to output them to a calculator 19, and the sheet thickness at that time is calculated basing on the detected value of each load cells 8, 10, 12, and 14, and the rigidity of each mill, and the difference between the calculated thickness and a target sheet thickness is obtained by a comparator 20, and the result is inputted to an arithmetic device 21 to control a rolling reduction device 23, by its output thereby the sheet thickness of the material 1 is controlled to the prescribed value.

57. 发明专利

JPS5855103A ROLLING METHOD FOR LAMINATED PLATES 失效
公开(公告)号：JPS5855103A
公开(公告)日：1983-04-01
申请号：JP15363381
申请日：1981-09-30
申请人： HITACHI LTD
发明人： YASUDA KENICHI
IPC分类号： B21B1/22 , B21B1/38
摘要： PURPOSE:To make stable rolling free from uneven elongation, etc. possible by laminating plural sheets of plate materials, combining the plate materials in such a way that the broadside distribution of the total thickness of the laminated plate is approximately symmetrical on the right and left and subjecting these plate materials to lamination rolling. CONSTITUTION:A plate material having the deformation formed during hot rolling such as plate crowns or edge drops is cut to half, and the cut materials are laminated in such a way that the plate end parts are positioned on both ends, whereby the distribution in the width direction of the thickness totalling the thicknesses of the two upper and lower plates is made approximately symmetric to the right and left. In the case of laminating >=3 sheets of the plate materials or wedge materials, these materials are combined and laminated so as to assume lateral symmetry.

58. 发明专利

JPS57202908A ROLLING MILL 失效
公开(公告)号：JPS57202908A
公开(公告)日：1982-12-13
申请号：JP8695881
申请日：1981-06-08
申请人： HITACHI LTD
发明人： YASUDA KENICHI , TSUMURA SUKEFUMI
IPC分类号： B21B13/14 , B21B37/42
摘要： PURPOSE:To provide a thickness control function in a width direction effectively by specifying the diameter of intermediate rolls in the stage of moving the intermediate rolls to an axial direction and imparting bender forces upon work rolls and the intermediate rolls. CONSTITUTION:A rolling mill has at least a pair of work rolls 1, intermediate rolls 2 and backup rolls 3 at the top and bottom, and the rolls 1 and the rolls 2 are used as small diamter backup rolls. The diameter of the rolls 2 is made >=1.1 times the diameter of the rolls 1 and the rolls 2 are moved in an axial direction, whereby bender forces are imparted upon the rolls 1 and the rolls 2 and the thickenss in the width direction of a rolling material is controlled. The shape correctable range of the thickness by the rolling mill is made definite by this and a higher effect is obtained.

59. 发明专利

JPS5668518A METHOD AND APPARATUS OF CONTROLLING SHAPE IN ROLLING MILL 失效
公开(公告)号：JPS5668518A
公开(公告)日：1981-06-09
申请号：JP14336179
申请日：1979-11-07
申请人： HITACHI LTD
发明人： YASUDA KENICHI , SHIDA SHIGERU , TSUMURA SUKEFUMI
IPC分类号： B21B37/00 , B21B37/38 , B21B37/42 , B21B37/58
摘要： PURPOSE:To make possible highly accurate and rapid shape controlling by forecasting the asymmetrical shapes produced by asymmetrical factors such as temp. differences of the material to be rolled on the inlet side of a rolling mill having a pair of axially movable rolls and performing the correction of asymmetrical shapes. CONSTITUTION:In the rolling mill having at least a pair of axially movable rolls 2, 3, the apparatus is constituted of the asymmetrical factor detectors, such as thickness gauges 17, 18', material position detectors 14, 15, thermometers 20, 21, etc. provided on the inlet side, the calculators 23, 25 which extract asymmetrical components from the asymmetrical shapes produced by the above-described factors and create vectors, the calculator 26 which selects an optimum correction device out of the right and left bending force differences for correcting said asymmetrical shapes, a calculator 35 which calculates the optimum correction amount of the correcting devices, and a screw-down command device 31 which controls set value, whereby the correction of the asymmetrical shapes is accomplished. These eliminate the existence of any shape insufficiency owing to time delay and make possible rapid shape controlling.

60. 发明专利

JPS566715A SHEET CROWN CONTROLLER FOR ROLLING MILL 失效
公开(公告)号：JPS566715A
公开(公告)日：1981-01-23
申请号：JP8133379
申请日：1979-06-29
申请人： NIPPON STEEL CORP , HITACHI LTD
发明人： NAKASHIMA HIROE , KIKUMA TOSHIO , YASUDA KENICHI , SHIDA SHIGERU , AWATSUHARA HIROSHI , TSUMURA SUKEFUMI
IPC分类号： B21B13/14 , B21B37/00 , B21B37/42
摘要： PURPOSE:The titled controller made possible to control the sheet crown at a low cost and quickly, by operating the sheet crown from the rolling load, the bending force, etc., during the rolling work, and by controlling thus operated sheet crown so as to be equal to the set point. CONSTITUTION:The rolling load P is measured by the load cells 10, 11, and is operated by the adder 12; the moved positions of the moving rolls 6, 7, are measured by the detectors 13, 14, and their distance delta is operated. The values QR, QL, of the right and the left bending forces are detected by the load cells 17, 18, and their mean value Q is operated by the operator 19. These values are inputted to the computer 20 which then operates these values together with the sheet breadth B given by the setting board 16 and the present value of the sheet crown Ch is obtained. The comparator 21 connected to this computer 20 compares the present sheet crown Ch with the set value of the sheet crown, Cho, and their difference DELTACh is obtained; the variation DELTAQ of the bending force required in making above obtained bending forces' difference DELTACh zero is operated 22 and is sent to the command unit 25.

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