专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH0587336B2 失效
公开(公告)号：JPH0587336B2
公开(公告)日：1993-12-16
申请号：JP14017386
申请日：1986-06-18
申请人： NISSHIN STEEL CO LTD
发明人： NARAHARA HIROSHI , OCHI HIROYUKI
IPC分类号： B21B37/00 , B21B37/18 , B21B37/20 , B21B37/50 , B21B37/08

2. 发明专利

JPH0515767B2 失效
公开(公告)号：JPH0515767B2
公开(公告)日：1993-03-02
申请号：JP1124187
申请日：1987-01-22
申请人： NISSHIN STEEL CO LTD
发明人： NARAHARA HIROSHI , DOI KENJI
IPC分类号： C21D9/68 , B21C47/02

3. 发明专利

JPH04305304A METHOD FOR CONTROLLING CAMBER IN HOT ROLLING MILL 失效
公开(公告)号：JPH04305304A
公开(公告)日：1992-10-28
申请号：JP9124291
申请日：1991-03-29
申请人： NISSHIN STEEL CO LTD
发明人： NARAHARA HIROSHI , MATSUMOTO KENICHI , SHIGA YUKINARI
IPC分类号： B21B37/00 , B21B37/22 , B21B37/30 , G05B13/02
摘要： PURPOSE:To control chamber by moving a rolled stock in the width direction with edger rolls of a hot rolling mill. CONSTITUTION:In a rolling line which is arranged with a 1st rolling equipment which is provided with a 1st stand in which a rolling load measuring means and roll gap adjusting means are provided, means for measuring the temp. and thickness of rolled stock which are provided on the inlet side of the 1st stand and means for detecting the position in the width direction of the rolled stock arranged on the inlet and outlet sides of a (n-1)th stand, and an n-th rolling equipment which is provided with a position detecting means which is provided on the inlet and outlet sides of an n-th stand provided with a rolling lead measuring means and roll gap adjusting means; feed forward control that is implemented with the edger rolls so as to correct the camber of the rolled stock by calculating wedge ratio, camber ratio and temp. difference in the width direction of the rolled stock from the measured value of the 1st rolling equipment and feedback control that the position of the edger rolls is adjusted so as to correct chamber by calculating camber by the position ion the width direction of the rolled stock on the inlet and outlet sides of the n-th rolling mill are involved.

4. 发明专利

JPH04100626A METHOD FOR AUTOMATICALLY CONTROLLING SHEET THICKNESS 失效
公开(公告)号：JPH04100626A
公开(公告)日：1992-04-02
申请号：JP22050990
申请日：1990-08-21
申请人： NISSHIN STEEL CO LTD
发明人： SHIGA YUKINARI , NARAHARA HIROSHI
IPC分类号： B21B37/00 , B21B37/18 , B21B37/30 , B21B37/58 , B21B37/68
摘要： PURPOSE:To prevent the sheet from meandering even if the change of the load level occurs rapidly, by controlling the position of rolling reduction so that the draft of the operating side and the driving side are made constant and the center sheet thickness is made to the target sheet thickness. CONSTITUTION:The sheet thicknesses of the operating side of the inlet side, the center position and the driving side are made respectively as Hw, Hc, Ho, each sheet thickness of the outlet side is made as hw, hc, ho, and the draft of the operating side and the driving side are respectively rw=(Hw-hw)/Hw, ro=(Ho-ho)/Hoo rw=ro, and the draft is made constant. The change of the position of rolling reduction is corrected based on Sw, So which are expressed as the equation I, and the equation II. A, B, C, D are the values shown in the equation III, the equation IV. Sw, Sw; the current value of roll gap of the operating side and the driving side, Mw and Mw; mill constant, Fw and Fw: the current value of rolling load, mw and mo: the mill curve being the function of the load, Q: the plastic coefficient.

5. 发明专利

JPH02151315A METHOD FOR PREVENTING AND CONTROLLING NECKING IN HOT ROLLING WINDING MECHANISM 失效
公开(公告)号：JPH02151315A
公开(公告)日：1990-06-11
申请号：JP30226388
申请日：1988-12-01
申请人： NISSHIN STEEL CO LTD
发明人： NARAHARA HIROSHI , MATSUMOTO KENICHI , ONO HIROSHI
IPC分类号： B21C47/02 , B21C47/00
摘要： PURPOSE:To prevent drawn flaws from being generated and to improve the quality and yield by arranging 2nd pinch rolls on the upper stream of 1st pinch rolls and obtaining through each pinch roll the back tension to the excessive tension generated the instant that a strip is wound round a mandrel. CONSTITUTION:Immediately after the tip of the strip 3 passes the 2nd pinch rolls 6 and then the 1st pinch rolls 4, the rotation of the 2nd pinch rolls 6 is controlled to be reduced, and then immediately the rotation of the 1st pinch rolls 4 is controlled to be reduced. When the tip of the strip 3 begins winding round a mandrel 5, a tension is generated suddenly between the mandrel 5 and the 1st pinch rolls 4 but since the rotation of the 1st pinch rolls 4 and that of the 2nd pinch rolls 6 are reduced, a tension between the 2nd pinch rolls 6 and a last stand 2 can be kept drastically small or under the deformation resistance of the strip 3 and the necking of the strip 3 by excessive tension at the time of winding is eliminated.

6. 发明专利

JPS63149329A METHOD FOR CONTROLLING HOT STEEL STRIP COILER TO PREVENT DECREASE IN WIDTH OF HEAD PART OF SAID STRIP 失效
公开(公告)号：JPS63149329A
公开(公告)日：1988-06-22
申请号：JP29495486
申请日：1986-12-12
申请人： NISSHIN STEEL CO LTD
发明人： NARAHARA HIROSHI
IPC分类号： B21C47/02 , C21D9/68
摘要： PURPOSE:To prevent generation of a decrease in the width of a steel strip in the part before a pinch roll with a hot steel strip coiler by allowing the pinch roll to bear the tension impact to be generated at the moment when the front end of the steel strip winds around a mandrel as back tension. CONSTITUTION:The time when the front end of the steel strip 7 is bitten by the pinch roll 3 is detected by a detector 8 for the front end of steel when the front end of the steel strip 7 emerging from a final finish rolling stand 6 is conveyed on a hot run table 5 and winds around the mandrel 2 past the pinch roll 3. The front end position of the steel strip 7 is tracked by an arithmetic control part 15 of a pinch roll control part 14 by using the steel strip speed V detected by a 1st pulse generator (PLG) from the timing of the above-mentioned detection. Said control part predicts the time from the moment when the front end of the steel strip arrives at the mandrel 2 and is begun to be tensed between the stand 6 and the mandrel 2 before the winding of the steel strip around the mandrel is completed. The control part applies a speed standard to the pinch roll 3 in such a manner that the back tension can be taken by the pinch roll 3 during this time. The decrease in the width of the steel strip before the pinch roll 3 is thus prevented.

7. 发明专利

JPH06304617A ROLL SUPPORTING BASE FOR CHOCK ATTACHING AND DETACHING DEVICE 失效
公开(公告)号：JPH06304617A
公开(公告)日：1994-11-01
申请号：JP9568793
申请日：1993-04-22
申请人： NISSHIN STEEL CO LTD , MIZUTANI SEIKO KK
发明人： OGAMI KIMIHISA , NARAHARA HIROSHI , HAYAKAWA HIROAKI , TSUJI HIROSHI , TANIGUCHI TSUTOMU
IPC分类号： B21B31/08 , B21B31/10
摘要： PURPOSE:To surely position and attach a work roll at a prescribed position in the axial direction on a roll supporting base, not to slip the work roll in the axial direction after it is attached and to surely attach and detach the chock. CONSTITUTION:A guide roll 15 composed of an inclined part 15a and a flat part 15b is provided at the position corresponding to roll neck parts on both sides of attached work rolls in two upper and lower steps, an interval (c) at the lower end of the inclined part between both guide rolls is equalized to the length L of a roll body, the work rolls 16, 17 are guided by the inclined part and attached to the flat part. After they are attached, movement in the axial direction is controlled by the inclined part to prevent the deviation.

8. 发明专利

JPH0484614A METHOD FOR AUTOMATICALLY CONTROLLING SHEET THICKNESS 失效
公开(公告)号：JPH0484614A
公开(公告)日：1992-03-17
申请号：JP19832690
申请日：1990-07-25
申请人： NISSHIN STEEL CO LTD
发明人： SHIGA YUKINARI , NARAHARA HIROSHI , NAKAZONO EIJI
IPC分类号： B21B37/18 , B21B37/16
摘要： PURPOSE:To reduce the front end part of a sheet to be disposed as scrap by forward feeding the sheet thickness deviation to the ensuing stage stand when the front end of the sheet engages with a front stage stand and setting up the ensuing stage stand, then executing absolute value control when the front end of the sheet engages with the ensuing stage stand. CONSTITUTION:The correction rate of a draft is calculated by the deviation between the actual value determined by a gage meter and a target value when the front end of the sheet engages with the front stage stand. This value is fed forward to the ensuing stage stand by which the draft position is adjusted and the ensuing stage stand is set up again. The speed of the ensuing stage stand is then corrected according to the change component of the mass flow by the correction of the draft position of the stand to correct the inter-stand tension at the time of engaging with the next stand is controlled to the target value. This stage is combined with the stage of correcting the draft position so as to decrease the deviation between the actual value at the stand and the target thickness to 0 when the front end of the sheet engages with the stand. The time before the completion of the control is shortened in such a manner by which the off-gage part is decreased. The front end part of the sheet to be disposed as the scrap is reduced, as well.

9. 发明专利

JPH0198910A METHOD FOR DETECTING LOOP HEIGHT OF MATERIAL TO BE PICKLED IN PICKLING TANK 失效
公开(公告)号：JPH0198910A
公开(公告)日：1989-04-17
申请号：JP25465887
申请日：1987-10-12
申请人： NISSHIN STEEL CO LTD
发明人： MATSUNAGA MASAO , NARAHARA HIROSHI
IPC分类号： C23G3/02 , G01B21/02
摘要： PURPOSE:To securely detect the loop height without being affected by the material to be pickled or a slip, etc., by bringing a detection rod into direct contact with the material to be pickled and detecting its angle. CONSTITUTION:Continuous pickling facilitates the passing of the material 3 to be pickled in the pickling tank 1 at a constant speed through a free roll 4 to remove an oxide scale produced on the surface with pickling liquid 2. Here, a roll is fitted to the part that the material 3 to be pickled contacts and the detection rod 5 made of a material which is not corroded by the liquid 2 is fitted to a detection rod fitting base 9 on the pickling tank 1 through a detection rod support part 6. The detection rod 5, therefore, enters free arcuate operation around the support part 6 as a fulcrum in the moving direction of the material 3 to be pickled according to the height of the material 3 to be pickled. Then the detection rod 5 is coupled with a rotary encoder 12, whose shaft varies in angle by the angle variation of the detection rod 5, thereby outputting a corresponding electric signal. This signal is passed through an angle detection unit 7 and a controller 8 performs operation to find the loop height of the material 3.

10. 发明专利

JPH08174009A ROLLING MILL AND ROLLING METHOD 失效
公开(公告)号：JPH08174009A
公开(公告)日：1996-07-09
申请号：JP32735494
申请日：1994-12-28
申请人： HITACHI LTD , NISSHIN STEEL CO LTD
发明人： YOSHIOKA TAKAHIRO , SAKANAKA TAKAO , KAGA SHINICHI , NARAHARA HIROSHI , ONO HIROSHI , SHIGA YUKINARI
IPC分类号： B21B31/18 , B21B13/14
摘要： PURPOSE: To improve the positioning accuracy of work rolls and reduce the influence on roll chocks by horizontal forces added to the rolls in a rolling mill and rolling method in which the roll chocks are moved so that the axial centers of a pair of rolls are crossed each other in a plane parallel to the plate surface of a rolled stock. CONSTITUTION: The roll chock 1 for supporting the roll is supported with hydraulic cylinders 2a, 2b on the inlet and outlet sides of the rolled stock and the push side port 2c of the hydraulic cylinder 2a and the secondary port 4c of a closed center type four-direction selector valve 4, and the push side port 2d of the hydraulic cylinder 2b and the secondary side 4d of the direction selector valve 4 are respectively connected. The oil pressure added to the hydraulic cylinders 2a, 2b is adjusted in accordance with the rolling state with the direction selector valve 4 and the position of the roll chock 1 is controlled.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式