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1. 发明专利

JPS63238916A TRACKING METHOD FOR ROLLED STOCK 失效
公开(公告)号：JPS63238916A
公开(公告)日：1988-10-05
申请号：JP7123987
申请日：1987-03-25
申请人： NISSHIN STEEL CO LTD , MITSUBISHI HEAVY IND LTD , MITSUBISHI ELECTRIC CORP
发明人： YAMAZAKI MASAKUNI , ISHIKAWA SHUICHI , MATSUMOTO KENICHI , NAKAZONO EIJI , TSUKAMOTO EIHIKO , KAWANAMI KATSUSUKE , KURAMOTO SATORU
IPC分类号： B21B37/00
摘要： PURPOSE:To perform an accurate tracking by corresponding to each temp. skid obtained from the bits of temp. information of a rolled stock from an outlet of a rough rolling mill and from an outlet of a finish rolling mill. CONSTITUTION:Data from the top end are given a second look at each skid cycle and when the data to be stored on line of the temp. memory value 17 of the finish outlet side are stored over one skid cycle, at this time, the maximum temp. value and the minimum temp. value in the first one skid cycle within the temp. memory value 14 in which temp. information 13 is stored in the memory of a control device are taken out. The maximum temp. value and the minimum temp. value in the temp. memory 17 are taken out to be the corresponding points of each other. And so forth, the maximum temp. value and the minimum temp. value in the next one skid cycle are taken out, the points of the temp. memory value 14 of the rough rolling mill outlet and the temp. memory value of the finish rolling mill outlet are allowed to correspond.

2. 发明专利

JPS63238914A CONTROL METHOD FOR SHEET WIDTH IN ROUGH ROLLING MILL 失效
公开(公告)号：JPS63238914A
公开(公告)日：1988-10-05
申请号：JP7123887
申请日：1987-03-25
申请人： NISSHIN STEEL CO LTD , MITSUBISHI HEAVY IND LTD , MITSUBISHI ELECTRIC CORP
发明人： YAMAZAKI MASAKUNI , ISHIKAWA SHUICHI , MATSUMOTO KENICHI , NAKAZONO EIJI , ABE MITSUHIRO , OSONO RYUICHI , KURAMOTO SATORU
IPC分类号： B21B37/00 , B21B37/22
摘要： PURPOSE:To control the width of a rolled stock to be constant for the total length of the stock on the outlet side of a horizontal roll and to obtain products having high accurate sheet width by correcting a setting of a vertical roll for the top and rear end parts of the stock based on width measurement data for a constant part of the stock. CONSTITUTION:A width measuring instrument 5 is used to measure a width of a constant part of a rolled stock 1; a width mean value is found based on obtained width measurements before a start of roll opening correction of a vertical roll 2 and the mean value is used to correct the vertical roll opening. On the other hand, for the rear end part, a mean width value of the total part is found and is used as a vertical roll opening correction value because measurement for the total constant part is finished. Thus, a width of the stock 1 for the total length is controlled to be constant on the outlet side of a horizontal roll 3 and products having high accurate width are obtained.

3. 发明专利

JPS63295010A CONTROL DEVICE FOR INTER-PITCH 失效
公开(公告)号：JPS63295010A
公开(公告)日：1988-12-01
申请号：JP13264287
申请日：1987-05-28
申请人： NISSHIN STEEL CO LTD , MITSUBISHI ELECTRIC CORP
发明人： YAMAZAKI MASAKUNI , HASHIMOTO KATSUHIKO , ISHIKAWA SHUICHI , MANABE SHUNJI , TAKAJI KATSUHIKO , KURAMOTO SATORU
IPC分类号： B21B37/00
摘要： PURPOSE:To improve the efficiency of rolling work by calculating required times that a tail end of preceding material and a top end of succeeding material travel from a detecting position to a rolling mill respectively, and base on its difference, by controlling the travel of succeeding material. CONSTITUTION:Speed detectors 18, 19 of the rolling mill 1 and table roller 13a are provided and connected to 1st and 2nd arithmetic units 18, 19. The arithmetic units 18, 19 estimate and calculate the required times TA, TB that the tail end 4B of the preceding material and the top end 5A of the succeeding material travel from the position of the position detector 7 to the rolling machine 1 respectively. Then, an inter-pitch control circuit 22 calculates the inter-pitch TB-TA and compares it with a set pitch TGAP to stop, pull back and feed again the succeeding material 5 to jogging transfer. In this way, because the waiting time in the jogging of the succeeding material is reduced, the efficiency of the rolling work is improved.

4. 发明专利

JPS63277720A METHOD FOR CONTROLLING PULLING-OUT PITCH 失效
公开(公告)号：JPS63277720A
公开(公告)日：1988-11-15
申请号：JP11238787
申请日：1987-05-11
申请人： NISSHIN STEEL CO LTD , MITSUBISHI ELECTRIC CORP
发明人： YAMAZAKI MASAKUNI , HASHIMOTO KATSUHIKO , ISHIKAWA SHUICHI , TAKAJI KATSUHIKO , KURAMOTO SATORU
IPC分类号： B21B37/00 , C21D1/00 , C21D9/00 , C21D11/00
摘要： PURPOSE:To efficiently execute hot rolling of a steel slab by executing correction of pulling-out pitch by considering the root mean square value (RMS) of current required for rolling of the slab in a furnace in the hot rolling equipment at the next process at the time of pulling out the heated steel slab from the heating furnace. CONSTITUTION:The steel slab pulled out from the heating furnace 1 is wound into a coiler 5 as a steel sheet after rolled by rough rolling mills 2, 3 and multi- stage finishing mills 4. In this case, the ejecting pitch of the steel slab pulled out from the heating furnace 1 is found from the actual current of the pulled out slab by the current root mean square value (RMS) for required rolling. Next, the RMS of the steel slab in the heating furnace to be pulled out and rolled after this is predictively calculated and the actual RMS is added to the calculated RMS and the pulling out pitch of the steel slab from the heating furnace is decided as the future RMS. The rolling work can be executed under the max. load of the motor for rolling and the rolling work having extremely high efficiency can be executed.

5. 发明专利

JPS63238913A DEVICE FOR CONTROLLING SHEET WIDTH 失效
公开(公告)号：JPS63238913A
公开(公告)日：1988-10-05
申请号：JP7123787
申请日：1987-03-25
申请人： NISSHIN STEEL CO LTD , MITSUBISHI HEAVY IND LTD , MITSUBISHI ELECTRIC CORP
发明人： YAMAZAKI MASAKUNI , ISHIKAWA SHUICHI , MATSUMOTO KENICHI , NAKAZONO EIJI , TERADA IKUJI , TAKAMOTO EIJI , KURAMOTO SATORU
IPC分类号： B21B37/00 , B21B37/22
摘要： PURPOSE:To obtain products having high width accuracy by calculating tensions and tension applying periods of a strip passing through a finishing rolling mill and a coiler for the total length of the strip and controlling a strip width on the outlet side of the finishing mill based on the calculated values. CONSTITUTION:Width variations of a hot strip are previously calculated based on a tension, a period of time for which a tension is applied, a temp. and composition of the hot strip. Width variations generated between a finishing mill 4 and a coiler 7 are predicted at respective points of the strip. A controller 15 sends opening correction signals to a rough rolling mill vertical roll 1 to perform width correction on a bar based on the predicted width variation at respective points and a previously determined relation between a strip width and a bar width. A bar subjected to width correction is transferred to the inlet side of the finishing mill 4.

6. 发明专利

JPH09253732A PRODUCTION OF HOT ROLLED STEEL PLATE 失效
公开(公告)号：JPH09253732A
公开(公告)日：1997-09-30
申请号：JP7174696
申请日：1996-03-27
申请人： NISSHIN STEEL CO LTD
发明人： KUDO YOSHIRO , KURITA TOSHIYA , ODAGIRI SHIGERU , ISHIKAWA SHUICHI , HIRAMATSU TERUSHI , OMOSAKO KOJI , AKIZUKI MAKOTO
IPC分类号： B21B45/08 , B21B1/22
摘要： PROBLEM TO BE SOLVED: To produce a hot rolled steel plate excellent in surface property even for hard to put scale material by descaling so as to calculate a colliding pres sure required at the minimum to peel scale and setting the colliding pressure higher than the calculated. SOLUTION: A scale breaker 3 arranged in the direction orthogonal to the moving direction of slab is arranged at the inlet side of a finish rolling mill 2, a slab containing 0.2-2.0% Si or 0.2-2.0% Ni is subjected to descaling by high pressure water jet at least one time or more. Herein a colliding pressure P is set to a colliding pressure P' at the irreducible minimum obtained by the following equation (1). P'=6√Si+4√Ni+0.7/1×10 (R+45)×log(T/160)+1.1...(1) P': Colliding pressure at the irreducible minimum (kgf/cm ) P: Colliding pressure (kgf/cm ) Si: Si(%) Ni: Ni(5) R: Accumulated draft (%) up to descaling T: Steel temp. ( deg.) at descaling.

7. 发明专利

JPH09103818A MANUFACTURE OF HOT ROLLED STEEL SHEET 失效
公开(公告)号：JPH09103818A
公开(公告)日：1997-04-22
申请号：JP25981495
申请日：1995-10-06
申请人： NISSHIN STEEL CO LTD
发明人： KUDO YOSHIRO , ISHIKAWA SHUICHI , ODAGIRI SHIGERU , KURITA TOSHIYA , HIRAMATSU TERUSHI , OMOSAKO KOJI , YAMADA TOSHIRO
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 excellent in scale defect free surface property by executing descaling in appropriate condition even to Si-containing steel and Ni-containing steel being hardly descaling material. SOLUTION: Slab total length is sent out from a roughing mill 1 after finishing the last rough rolling and thereafter descaling is carried out by injecting high pressure water jet onto the slab surface with collision pressure 4-30kfg/cm from FSB3 in the state passed a steel product 4 so that elapsed time till passing through FSB3 on entry side of finish mill 2 may be 30-300 seconds and the draft of each pass at rough rolling may be 25% or more and cumulative draft from a starting point of rolling to before finish rolling may be >=85%.

8. 发明专利

JPH0399716A METHOD FOR PREVENTING SEIZURE FLAW OF LOOPER ROLLER WHEN STAINLESS STEEL IS HOT ROLLED 失效
公开(公告)号：JPH0399716A
公开(公告)日：1991-04-24
申请号：JP23629189
申请日：1989-09-11
申请人： NISSHIN STEEL CO LTD
发明人： KURITA TOSHIYA , ISHIKAWA SHUICHI , ODAGIRI SHIGERU
IPC分类号： B21B39/08 , B21B37/50 , B21B45/02
摘要： PURPOSE:To prevent the generation of roll marks due to a looper roller by supplying a lubricant or a water solution of iron oxide to the looper roller. CONSTITUTION:Tension control for a strip 9 with the looper roller 3 is performed by applying stable tension to the strip by detecting the deviation from the target value of height of the looper roller 3 and controlling the revolving speed of motors for a rolling mill 1 and a rolling mill 2. At this time, the lubricant or the water solution of iron oxide which is stored in a tank 4 is force fed with a pump 5 and is jetted with a nozzle 6 on the looper roller 3 which is arranged between the rolling mills 1, 2. Thereby, seizure of the rolled stock 9 to the roll 3 is prevented and roll marks can be prevented.

9. 发明专利

JPH0386307A FEEDING DEVICE FOR LUBRICANT FOR HOT ROLLING OF STAINLESS STEEL AND NOZZLE CLOGGING PREVENTING METHOD IN DEVICE THEREOF 失效
公开(公告)号：JPH0386307A
公开(公告)日：1991-04-11
申请号：JP21926989
申请日：1989-08-26
申请人： NISSHIN STEEL CO LTD
发明人： KURITA TOSHIYA , ISHIKAWA SHUICHI , ODAGIRI SHIGERU
IPC分类号： B21B27/06 , B21B27/10 , B21B45/02
摘要： PURPOSE:To uniformly spray a specified high viscous lubricant to a rolling roll by installing an accumulator between a high pressure plunger pump connected to the tank in, which a specified high viscous lubricant is stored and a nozzle directed to a rolling roll. CONSTITUTION:An accumulator 6 is set up on a piping 4 located between the tank 2 stored with the lubricant of high viscosity where an iron oxide powder is dispersed at

10. 发明专利

JPH1112656A HEATING FURNACE OPERATION IN ALTERNATE ROLLING SYSTEM 失效
公开(公告)号：JPH1112656A
公开(公告)日：1999-01-19
申请号：JP9433798
申请日：1998-04-07
申请人： NISSHIN STEEL CO LTD
发明人： MIYASHITA NORICHIKA , TAKEI KUNIO , ISHIKAWA SHUICHI
IPC分类号： C21D9/00
摘要： PROBLEM TO BE SOLVED: To prevent deterioration caused by overheating or heat shortage of a slab according to the variation of staying time in a furnace by giving priority to extraction of the slab from a second heating furnace when there is a difference in the kind of steel between the slab charged in the second heating furnace and the slab charged in a first heating furnace, and also if there is a limit to the staying time of the slab in the second heating furnace. SOLUTION: An extractable time TD(N) of a slab from a No.1 furnace and an extractable time TC(N) of a slab from a No.2 furnace are compared, and when the TD(N) is shorter than the TC(N), a slab is ejected from the No.1 furnace. The extractable time T(N) of the following slab extracted from the No.1 furnace is set to the extraction scheduled time Tx(N) when the extraction scheduled time Tx(N) is longer than the extractable scheduled time TD(N). When the extractable scheduled time Tx(N) is shorter than the extractable time TD(N), the extraction time of the following slab is set to the extractable time TD(N). When the extractable time TD(N) is longer than the extractable time TC(N) from the No.2 furnace, the slab from the No.2 furnace is extracted.

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