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21. 发明专利

JPH09122729A HOT ROLLING METHOD 失效
公开(公告)号：JPH09122729A
公开(公告)日：1997-05-13
申请号：JP28373495
申请日：1995-10-31
申请人： NISSHIN STEEL CO LTD
发明人： SHIGA YUKINARI , ISHIKAWA SHUICHI
IPC分类号： B21B39/08
摘要： PROBLEM TO BE SOLVED: To prevent wrinkling and to execute sure coiling and transportation even when it is an extremely thin strip by moving each guide roll of looper equipment to decrease the tranportation speed of the strip. SOLUTION: First, the amount of loop is zero by lowering vertically movable guide rolls 4a, 4b of the looper equipment 15 to the same positions as pinch rolls 3, 5. When the strip 13 which is delivered from the final stand 1 reaches inlet-side pinch rolls 3, rolling speed is continued by the same pattern as the conventional one at the final stand 1. On the other hand, with the outlet-side pinch rolls 5, speed control is executed at a speed at which the strip 13 is stably threaded and the head part is delivered to a coiler 12. The loop which is generated by speed difference between the pinch rolls 5 and the final stand 1 during this process is absorbed with the looper equipment 15. When the strip 13 coiles round the coiler 12, the amount of loop is controlled by controlling the circumferential speed of the outlet-side pinch rolls 5 in synchronism with the circumferential speed of the final stand 1.

22. 发明专利

JPH0683855B2 失效
公开(公告)号：JPH0683855B2
公开(公告)日：1994-10-26
申请号：JP3760186
申请日：1986-02-22
申请人： NISSHIN STEEL CO LTD
发明人： HASHIMOTO KATSUHIKO , FUKADA FUSATSUGU , NAKAZONO EIJI , ISHIKAWA SHUICHI
IPC分类号： B21B39/00 , B21B39/12

23. 发明专利

JPS6440108A METHOD FOR CONTROLLING SHEET CROWN IN HOT ROLLING LINE 失效
公开(公告)号：JPS6440108A
公开(公告)日：1989-02-10
申请号：JP19530187
申请日：1987-08-06
申请人： NISSHIN STEEL CO LTD
发明人： TAKAI SHIGEMITSU , ISHIKAWA SHUICHI , SAKAMOTO RYUKICHI
IPC分类号： B21B37/42 , B21B37/00
摘要： PURPOSE:To improve the shape quality of a rolled stock by comparatively calculating set rolling conditions with an actual operating conditions and a surface temp. distribution of the stock and performing temp. control to a form an optimum temp. distribution on a succeeding stock. CONSTITUTION:A multistage finishing mill 1a...1n and a sheet thickness control unit 3, and a host computer 11 are installed. A thickness gage 6, a thermometer 7, and a temp. controller 8 are installed in the inlet side 5 of the mill; a 2nd thickness gage 13 and a 3rd thermometer 14 are installed in the outlet side 12 of the mill. The host computer 11 compares previously set rolling conditions with actual operating conditions such as a drafting force, position of an intermediate roll 4, and a sheet thickness distribution and forms an optimum temp. distribution by controlling surface temps. of a succeeding rolled stock. Then, the sheet thickness control unit 3 controls a drafting force and a position of the roll 4. The shape quality is improved because crown control is performed in an optimum temp. distribution.

24. 发明专利

JPS62197212A DEVICE AND METHOD FOR CONTROLLING CARRIER TABLE ROLLER SEED IN HOT ROLLING 失效
公开(公告)号：JPS62197212A
公开(公告)日：1987-08-31
申请号：JP3760186
申请日：1986-02-22
申请人： NISSHIN STEEL CO LTD
发明人： HASHIMOTO KATSUHIKO , FUKADA FUSAJI , NAKAZONO EIJI , ISHIKAWA SHUICHI
IPC分类号： B21B39/00 , B21B39/12
摘要： PURPOSE:To realize the correct speed control of a carrier roller by correcting an advance rate estimation model equation by using the advance rate re- arithmetic operation vale amended by arithmetic operation from an observed advance rate and observed parameter value and by performing the speed control by using the estimation value adding the correction. CONSTITUTION:The advance rate is found by the advance rate estimation model equation by integrating the pulse number generated from the pulse generator 5 of a driving motor 4 while the tip of a rolled stock 1 is passed through the space between the tip position detecting devices 6, 7 at the rolling roll 2 outlet side, in the 1st stage. In the 2nd stage an advance rate re-arithmetic operation value is found with the re-arithmetical operation by using the observed value for the variable which is used for the arithmetic equation finding the advance rate. The speed of the rolled stock 1 at the roll 2 inlet side and outlet side is estimated by correcting the advance rate estimation model equation by the value obtd. at the 1st and 2nd stages, in the 3rd stage. A carrier table roller 3 is subjected to a speed control by setting to this estimation value. In this way the correct speed control of the carrier table roller can be performed.

25. 发明专利

JPS6153125B2 失效
公开(公告)号：JPS6153125B2
公开(公告)日：1986-11-17
申请号：JP16358179
申请日：1979-12-18
申请人： NISSHIN STEEL CO LTD
发明人： YAMAZAKI MASAKUNI , HIRAYAMA YUKIO , ASADA KOICHI , ISHIKAWA SHUICHI , TAKAJI KATSUHIKO
IPC分类号： B21B37/18

26. 发明专利

JP2001105021A METHOD OF MANUFACTURING HOT-ROLLED STEEL SHEET 失效
公开(公告)号：JP2001105021A
公开(公告)日：2001-04-17
申请号：JP27944799
申请日：1999-09-30
申请人： NISSHIN STEEL CO LTD
发明人： ISHIKAWA SHUICHI , NAGAI HIDEAKI , KUDO YOSHIRO
IPC分类号： B21B45/08 , C22C38/00 , C22C38/02 , C22C38/08
摘要： PROBLEM TO BE SOLVED: To provide a manufacturing method of a hot-rolled steel sheet excellent in surface property without scale defects by executing descaling by jetting high-pressure water jet from two rows of nozzles to high silicon and high nickel steel containing Si and Ni of 0.2-2.0 wt.% respectively in a hot-rolling stage. SOLUTION: By using a descaling device on which two rows of headers 4a, 4b are arranged at a proper interval in the advancing direction of the line and setting the collision pressure for descaling at >=3 kgf/cm2 and the attack angles θ of the descaling nozzles of each row respectively at 0-5 deg., descaling is executed.

27. 发明专利

JPH11244926A DEVICE FOR COOLING HOT ROLLED STEEL SHEET 失效
公开(公告)号：JPH11244926A
公开(公告)日：1999-09-14
申请号：JP4950798
申请日：1998-03-02
申请人： NISSHIN STEEL CO LTD , NISSHIN KOKI KK
发明人： ISHIKAWA SHUICHI , MATSUO HIDEAKI , TATEWAKI MASABUMI
IPC分类号： B21B39/12 , B21B43/04 , B21B45/02 , C21D9/52 , C21D9/573
摘要： PROBLEM TO BE SOLVED: To interrupt cooling water supplied to the edge parts of a hot rolled steel sheet from the underside by connecting a shielding part for interrupting the cooling water which is jetted from nozzles to an arm and shifting the shielding part to a position where the cooling water is interrupted and a position where the cooling water is not interrupted by operating the arm. SOLUTION: A cooling system is arranged along the direction of the roll axis between rollers 1. The nozzles 5 of the cooling system are provided extending between the rollers 1 and colling is executed by jetting the cooling water which is supplied from a main pipes 3 and headers 4 to a hot strip 10. The shielding part 9 provided at the tip of the arm 8 is moved through an operating plate (operating member) 6 and the arm 8 with an air cylinder (operating device) 7. When the arm 8 is rotated anticlockwise, the cooling water which is jetted from the nozzles 5 is interrupted with the shielding part. It is desirable to use a roller table on which disk-like rollers are attached at fixed intervals and adjacent rollers are alternately arranged.

28. 发明专利

JPH09155437A MANUFACTURE OF HOT ROLLED STEEL SHEET 失效
公开(公告)号：JPH09155437A
公开(公告)日：1997-06-17
申请号：JP7175096
申请日：1996-03-27
申请人： NISSHIN STEEL CO LTD
发明人： KUDO YOSHIRO , ISHIKAWA SHUICHI , ODAGIRI SHIGERU , KURITA TOSHIYA , HIRAMATSU TERUSHI , OMOSAKO KOJI , AKIZUKI MAKOTO
IPC分类号： B21B45/08 , B21B1/26 , C22C38/00 , C22C38/02 , C22C38/08
摘要： PROBLEM TO BE SOLVED: To obtain a hot rolled steel sheet having an excellent surface property without scale flaws by applying descaling under a suitable condition even for a Si containing steel and Ni containing steel difficult to peel scales. SOLUTION: Draft of every path in a rough rolling before finish rolling is specified to be >=25% and cumulative draft from the rolling starting point to before finish rolling is specified to be >=85%. Moreover, descaling is performed for the steel of 850-1000 deg.C in the range of impact pressure per unit area of 4-30kgf/cm , the time period of >=0.002sec to

29. 发明专利

JPH0377851B2 失效
公开(公告)号：JPH0377851B2
公开(公告)日：1991-12-11
申请号：JP11234086
申请日：1986-05-15
申请人： NISSHIN STEEL CO LTD
发明人： MYASHITA NORICHIKA , TAKEI KUNIO , ISHIKAWA SHUICHI
IPC分类号： C21D9/00 , B21B37/00

30. 发明专利

JPS6466005A METHOD FOR ROLLING STAINLESS STEEL 失效
公开(公告)号：JPS6466005A
公开(公告)日：1989-03-13
申请号：JP22255087
申请日：1987-09-05
申请人： NISSHIN STEEL CO LTD
发明人： NISHIKAWA TAKAFUMI , ISHIKAWA SHUICHI , MATSUMOTO KENICHI , TSUCHIYA GENKI , TAKAI SHIGEMITSU , KATAOKA TERUYUKI
IPC分类号： B21B1/22 , B21B3/00 , B21B3/02
摘要： PURPOSE:To prevent the generation of flaws on the surface of a steel strip at the time of rolling by forming oxide scale layers on the surfaces of the work rolls of a hot finishing mill, then rolling a stainless steel. CONSTITUTION:The oxide scale layers are formed on the surfaces of the work rolls of the hot finishing mill and thereafter, the stainless steel contg. 10wt.% Cr is rolled at the time of hot rolling the above-mentioned stainless steel. The oxide scale layers peel slightly in the form of fine grains from the surfaces and act as a lubricant when the stainless steel is brought into contact with said layers. Since the generation of the seizure of the stainless steel to the work roll is thereby obviated, the generation of the surface flaws on the rolled stainless steel is obviated.

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