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1. 发明专利

JPS632501A CROSS ROLLING METHOD FOR HOT SLAB 失效
公开(公告)号：JPS632501A
公开(公告)日：1988-01-07
申请号：JP14598986
申请日：1986-06-24
申请人： KAWASAKI STEEL CO , HITACHI LTD , HITACHI NUCLEAR ENG
发明人： UCHIDA HIDESHI , UEKI SHIGERU , TOUYAMA SUSUMU , HASHIMOTO SUNAO , SHIRAIWA HIROYUKI
IPC分类号： B21B1/02 , B21B37/72 , B21B39/00 , B21B39/12 , B21J1/02
摘要： PURPOSE:To prevent flawing of a slab surface by a slip between table rollers and the slab by detecting the retreating and advancing speeds of the slab during the cross rolling by a press and synchronizing the speeds of the table rollers with the retreating and advancing speeds of the slab. CONSTITUTION:Rollers 7, 8 for detecting an inlet or outlet side speed rotate and the roller revolutions are converted to pulses by pulse oscillators 9, 10 when the retreat or advance arises in the slab 1. The pulse signals are inputted to arithmetic units 11, 12 for inlet and outlet side table speeds, by which the table speeds are calculated. The calculated speeds are transmitted to control units 13, 14 for inlet and outlet side table speeds, by which the speeds of the inlet and outlet side tables 5, 6 are controlled and are synchronized with the retreat and advance speeds of the slab. While the speed detecting rolls are used in the above, the detection of the speed by means for measuring the position changes at the front and rear ends of the slab by distances using pinch rolls 2, 3 or ultrasonic waves or laser beams is also possible.

2. 发明专利

JPS635837A COOLING METHOD FOR WIDTH ROLLING REDUCTION PRESSING DIE OF HOT SLAB 失效
公开(公告)号：JPS635837A
公开(公告)日：1988-01-11
申请号：JP14680786
申请日：1986-06-25
申请人： KAWASAKI STEEL CO , HITACHI LTD , HITACHI NUCLEAR ENG
发明人： NIKAIDO HIDEYUKI , MATSUYAMA KOICHI , NIHEI MITSUO , KOMORI ATSUSHI , SHIRAIWA HIROYUKI
IPC分类号： B21B15/00 , B21J1/02 , B21J1/06 , B21J13/02
摘要： PURPOSE:To prevent the deterioration in the quality of a hot slab and to extend the life of a pressing die by slowly cooling the work face of a pressing die while under width rolling reduction pressing and strongly cooling the work face of the pressing die while under standby until the succeeding hot slab coming to the pressing die. CONSTITUTION:A width rolling reduction pressing die 2 is arranged at the upper and lower two steps and in case of a hot slab 1 being subjected to the width rolling reduction with a pressing die 2a (the die 2 at descending position) a pressing die 2b is in non-rolling reduction position and the work faces of both dies 2a, 2b are slowly cooled by nozzles 6, 8. The die is strongly cooled by the nozzles 6, 8 while under standby until the succeeding slab comes after completion of the press of the hot slab 1. The press die 2 is then shifted to the upper part and the succeeding width rolling reduction is performed by the press die 2b. In this case the press dies 2a and 2b are slowly cooled at the work faces thereof by the upper die nozzle only. After this width rolling reduction pressing the press die 2 is shifted to the lower part and strongly cooled by each nozzle.

3. 发明专利

DE69227431D1 未知
公开(公告)号：DE69227431D1
公开(公告)日：1998-12-03
申请号：DE69227431
申请日：1992-08-14
申请人： HITACHI LTD , HITACHI NUCLEAR ENG
发明人： TAKAKURA YOSHIO , KAJIWARA TOSHIYUKI , SHIRAIWA HIROYUKI , YASUDA KENICHI , HIRAMA YUKIO
IPC分类号： B21B13/14 , B21B29/00 , B21B37/38 , B21B37/00
摘要： A rolling mill has a work roll (1), a back-up roll (2) for supporting the work roll (1) vertically and driving it. A plurality of horizontal support rollers (4,6) contact the work roll at barrel diameter outside the rolling region and at both horizontal sides of the work roll and act to fix the position of the work roll in both horizontal directions during rolling and to oppose horizontal rolling forces. In order to reduce the bending of the work roll during rolling, there are provided means for applying horizontal counterbending forces to the work roll comprising members (5,7) e.g. rollers, contacting the work roll at locations axially further from the rolling region than the support rollers (4,6) and actuator means (14) for urging the members (5,7) against the work roll. The counterbending forces being in the same direction as the net horizontal force applied to said work roll by said back-up roll and the material being rolled. Preferably at least one condition of said work roll is sensed during rolling, and there are control means acting during rolling to control the counterbending forces in dependence on the sensed condition.

4. 发明专利

DE69404527T2 未知
公开(公告)号：DE69404527T2
公开(公告)日：1998-01-08
申请号：DE69404527
申请日：1994-04-21
申请人： HITACHI LTD , HITACHI NUCLEAR ENG
发明人： YASUDA KENICHI , HIRAMA YUKIO , NARITA KENJIRO , SATOU KOJI , TAKAKURA YOSHIO , SHIRAIWA HIROYUKI
IPC分类号： B21B13/14 , B21B37/00 , B21B37/18 , B21B37/38
摘要： To eliminate a vertically asymmetrical deflection, a rolling mill comprises a device for measuring horizontal deflections of upper and lower work rolls 2, 3 during rolling, a device for comparing values measured on the upper and lower sides and calculating the difference therebetween, and a horizontal deflection controller for determining whether the difference exceeds a predetermined range or not and imparting a horizontal bending to at least one of the work rolls. To eliminate a transversely asymmetrical deflection, a rolling mill comprises a device for measuring horizontal deflections of at least one of the work rolls at axially spaced positions during rolling, a device for comparing values measured on at the axially spaced positions and calculating the difference therebetween, and a horizontal deflection controller for determining whether the difference exceeds a predetermined range or not and imparting a horizontal bending to the one work roll at at least one of the axially spaced positions. This prevents an adverse effect by the work rolls being horizontally deflected in a vertically or transversely asymmetrical way, reduces the diameter of the work rolls, and increases the allowable rolling load. Stable rolling of high-quality strips with good shape or flatness is thus achieved.

5. 发明专利

DE69404527D1 未知
公开(公告)号：DE69404527D1
公开(公告)日：1997-09-04
申请号：DE69404527
申请日：1994-04-21
申请人： HITACHI LTD , HITACHI NUCLEAR ENG
发明人： YASUDA KENICHI , HIRAMA YUKIO , NARITA KENJIRO , SATOU KOJI , TAKAKURA YOSHIO , SHIRAIWA HIROYUKI
IPC分类号： B21B13/14 , B21B37/00 , B21B37/18 , B21B37/38
摘要： To eliminate a vertically asymmetrical deflection, a rolling mill comprises a device for measuring horizontal deflections of upper and lower work rolls 2, 3 during rolling, a device for comparing values measured on the upper and lower sides and calculating the difference therebetween, and a horizontal deflection controller for determining whether the difference exceeds a predetermined range or not and imparting a horizontal bending to at least one of the work rolls. To eliminate a transversely asymmetrical deflection, a rolling mill comprises a device for measuring horizontal deflections of at least one of the work rolls at axially spaced positions during rolling, a device for comparing values measured on at the axially spaced positions and calculating the difference therebetween, and a horizontal deflection controller for determining whether the difference exceeds a predetermined range or not and imparting a horizontal bending to the one work roll at at least one of the axially spaced positions. This prevents an adverse effect by the work rolls being horizontally deflected in a vertically or transversely asymmetrical way, reduces the diameter of the work rolls, and increases the allowable rolling load. Stable rolling of high-quality strips with good shape or flatness is thus achieved.

6. 发明专利

DE69227431T2 未知
公开(公告)号：DE69227431T2
公开(公告)日：1999-07-01
申请号：DE69227431
申请日：1992-08-14
申请人： HITACHI LTD , HITACHI NUCLEAR ENG
发明人： TAKAKURA YOSHIO , KAJIWARA TOSHIYUKI , SHIRAIWA HIROYUKI , YASUDA KENICHI , HIRAMA YUKIO
IPC分类号： B21B13/14 , B21B29/00 , B21B37/38 , B21B37/00
摘要： A rolling mill has a work roll (1), a back-up roll (2) for supporting the work roll (1) vertically and driving it. A plurality of horizontal support rollers (4,6) contact the work roll at barrel diameter outside the rolling region and at both horizontal sides of the work roll and act to fix the position of the work roll in both horizontal directions during rolling and to oppose horizontal rolling forces. In order to reduce the bending of the work roll during rolling, there are provided means for applying horizontal counterbending forces to the work roll comprising members (5,7) e.g. rollers, contacting the work roll at locations axially further from the rolling region than the support rollers (4,6) and actuator means (14) for urging the members (5,7) against the work roll. The counterbending forces being in the same direction as the net horizontal force applied to said work roll by said back-up roll and the material being rolled. Preferably at least one condition of said work roll is sensed during rolling, and there are control means acting during rolling to control the counterbending forces in dependence on the sensed condition.

7. 发明专利

JPH06304632A ROLLING MILL AND ROLLING METHOD 失效
公开(公告)号：JPH06304632A
公开(公告)日：1994-11-01
申请号：JP9627993
申请日：1993-04-22
申请人： HITACHI LTD , HITACHI NUCLEAR ENG
发明人： YASUDA KENICHI , HIRAMA YUKIO , NARITA KENJIRO , SATO KOJI , TAKAKURA YOSHIO , SHIRAIWA HIROYUKI
IPC分类号： B21B13/14 , B21B37/00 , B21B37/18 , B21B37/38 , B21B37/08
摘要： PURPOSE:To prevent an adverse influence due to horizontal deflection of a work roll which is asymmetric to the vertical direction or to the lateral direction, to reduce the diameter of the work roll, to increase a rolling load and to stably roll a high-quality metallic plate excellent in shape. CONSTITUTION:A device 26 which measures horizontal deflections of upper and lower work rolls 2, 3 in a rolling time, a device 27 to compare the upper and lower measured values with each other and to calculate the difference, a device 27 to decide whether this difference exceeds a prescribed range or not and horizontal deflection controllers 16-19, 28, 29 at least on one of the upper and lower work rolls are provided to dissolve the asymmetry between the upper and lower work rolls. Devices 30, 31 to measure the horizontal deflection of the work rolls in a rolling time, a device 32 to compare right and left measured values with each other and to calculate the difference, a device 32 to decide whether this difference exceeds a prescribed range or not and horizontal deflection controllers 16-19, 34 at least on one of right and left work rolls are provided to dissolve the asymmetry between the right and left work rolls.

8. 发明专利

JPH0491801A METHOD AND DEVICE FOR CONTROLLING BRIGHTNESS DIFFERENCE IN STRIP ROLLING 失效
公开(公告)号：JPH0491801A
公开(公告)日：1992-03-25
申请号：JP20498990
申请日：1990-08-03
申请人： HITACHI LTD , HITACHI NUCLEAR ENG
发明人： YASUDA KENICHI , HIRAMA YUKIO , SATO KOJI , NARITA KENJIRO , SHIRAIWA HIROYUKI
IPC分类号： B21B1/22 , B21B3/02 , B21B37/00 , B21B37/32 , B21B38/00
摘要： PURPOSE:To eliminate the brightness difference on front surface and rear at all times and to allow control so as to attain a specific target value by measuring the brightness on the front surface and rear of a strip on the outlet side of a rolling mill and controlling the inflow angle of the strip in such a manner that the difference thereof attains a prescribed value. CONSTITUTION:The reflected light of the light projected from an upper light source 10 to a rolled stock 1 on the outlet side of the rolling mill is detected by an upper optical sensor 11 and the reflectivity gU of the upper surface of a strip is measured. The reflectivity gL on the rear surface is similarly measured by a lower light source 12 and a lower optical sensor 13. The measured gU, gL are outputted to a computing element 15 which calculates the brightness difference g. The comparison of the brightness difference g and the target value go is then executed by a comparator 16 and the controlled variable ga to be corrected is calculated. An inflow angle alphais calculated by a computing element 17. Whether the inflow angle alpha is positive or negative is then discriminated by a discriminator 18. An output is delivered to a vertical direction position controller 20 of a roller 19 to control a moving device 21 in the case of positive. An output is delivered to a vertical direction position controller 23 of a roller 22 to control a moving device 24 in the case of negative.

9. 发明专利

JPS60166101A METHOD AND DEVICE FOR REDUCING WIDTH OF SLAB 失效
公开(公告)号：JPS60166101A
公开(公告)日：1985-08-29
申请号：JP1996084
申请日：1984-02-08
申请人： HITACHI LTD , HITACHI NUCLEAR ENG
发明人： NORIKURA TAKASHI , NIHEI MITSUO , YAMAMOTO KENJI , SHIRAIWA HIROYUKI
IPC分类号： B21B1/02 , B21B15/00
摘要： PURPOSE:To reduce a crop part at the rear end of a slab and to manufacture a steel sheet in high yield by forming the rear end of the slab to be reduced in width into a shape consisting of a straight part and a slant part before reducing the width of rear end by pressing its both side faces in the sheet width direction of rear end. CONSTITUTION:In reducing the width of a slab throughout its whole length, by transporting the slab, a blank material to be hot rolled, in its longitudinal direction, and pressing both side faces in the width direction of slab by a press tool 3, having a pressing face consisting of a face 3A parallel to the side face and a slant face 3B slanted with respect to the face 3A, by periodically vibrating the tool 3 in the sheet width direction of slab; the side faces of said rear end are previously pressed by another pressing face of tool 3 consisting of a slant face 3D slanted to the slab outlet side and a face 3C parallel to the side face of slab, before reducing the width of the rear end of slab. In this way, an ordinary width reduction is provided to the slab after forming its rear end into the shape consisting of a straight part and a slant part, to reduce the quantity of a crop part and a dog bone generating at the slab rear-end thereby improving the yield in steel sheet manufacturing.

10. 发明专利

JPH06190410A DEVICE FOR GRINDING ON-LINE ROLLING ROLL 失效
公开(公告)号：JPH06190410A
公开(公告)日：1994-07-12
申请号：JP34278392
申请日：1992-12-22
申请人： HITACHI LTD , HITACHI NUCLEAR ENG
发明人： MORI SHIGERU , SHIRAIWA HIROYUKI
IPC分类号： B21B28/04 , B24B5/37
摘要： PURPOSE:To efficiently grind the non-rolled part of a rolling roll and to hold it in a fixed rolling roll profile for a long time in an on-line rolling roll grinding device. CONSTITUTION:Rolling roll grinding device heads 5a, 5b and 6a, 6b in which a rotary grinding stone part 20, a grinding stone driving device 22, a grinding stone feeding device 23 and a grinding stone moving device 24 are given respectively are provided one by one on the operation side and on the driving side of the rolling roll 1a and each of them is moved and performs grinding independently. The grinding stone feeder 23 and the grinding stone moving device 24 are controlled by a controller so that the rotary grinding stone part 20 moves along a target roll profile. At this time, contact force between the rotary grinding stone part and the rolling roll is measured by a load cell 53, the inclination of the axis of the rolling roll is required an the rolling roll is moved along the target roll profile in consideration of this inclination.

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