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11. 发明专利

JPH0671307A CONTINUOUS HOT ROLLING METHOD FOR BILLET 失效
公开(公告)号：JPH0671307A
公开(公告)日：1994-03-15
申请号：JP23017292
申请日：1992-08-28
申请人： KAWASAKI STEEL CO
发明人： FUJII YUSAKU , TAKEBAYASHI KATSUHIRO , ISOBE KUNIO , YARITA YUKIO , TAKASHIMA NORIO
IPC分类号： B21B1/26 , B21B15/00 , B23K20/04
摘要： PURPOSE:To completely close/pressure weld a gape where is present in the middle part in the width direction at the time of joining billets at initial stage of finish hot rolling. CONSTITUTION:After the rear end part of a preceding billet 1 through rough rolling stage and the tip part of the following billet 2 which is transported succeedingly to that billet are cut into a shape that both end parts in the width direction are in noncontact with each other in the butting state of them, thickness reducing work is respectively executed to at least both end parts in the width direction of the rear end part of the preceding billet 1, or the rear end part of the preceding billet 1 and the tip part of the following billet 2. After forming at least both end parts in the width direction into shapes by which they are in contact with each other in the butting state of the respective billets by metal flow at that time, both billets are joined by executing heating and pressurizing treatment to the contact region and, after that, offered to finish rolling.

12. 发明专利

JPH0663605A METHOD FOR HOT ROLLING PARTIALLY JOINED PART OF STEEL STRIP 失效
公开(公告)号：JPH0663605A
公开(公告)日：1994-03-08
申请号：JP21889992
申请日：1992-08-18
申请人： KAWASAKI STEEL CO
发明人： KANARI SHOHEI , ISOBE KUNIO , YARITA YUKIO , YORIFUJI AKIRA
IPC分类号： B21B1/26 , B21B15/00 , B21B45/02
摘要： PURPOSE:To improve joining strength in a joined part by rolling a steel strip after temporally stopping the application of a lubricant and starting the application of a friction increasing agent when the partially joined part of the steel strip reaches a specified position on the inlet side of a rolling mill. CONSTITUTION:Just before a material to be rolled is bitten with rolls, i.e., at the time of T1 before, the friction increasing agent is applied, the application of the friction increasing agent is stopped at the time of T2 after the material to be rolled is bitten with the rolls and immediately a lubricant is applied. After that, rolling is continued and, when the scheduled biting time of the partially joined part is detected with a joined part detector, the application of the lubricant is stopped at the time of T3 before when is preceding to the time of the application of the friction increasing agent to the partially joined part and the application of the friction increasing agent is started after an elapse of the time of T3. Next, at the time of T2 after the end of the joined part passes through, the application of the friction increasing agent is stopped and immediately the application of the lubricant is restarted. Then, the time of (T1+T2) is measured from the time when the joined part reaches the position of at least the circumferential length of the rolling roll from a roll biting point.

13. 发明专利

JPH0655207A ENDLESS ROLLING METHOD 失效
公开(公告)号：JPH0655207A
公开(公告)日：1994-03-01
申请号：JP21171092
申请日：1992-08-07
申请人： KAWASAKI STEEL CO
发明人： WATANABE YUICHIRO , ISOBE KUNIO , YARITA YUKIO , NIKAIDO HIDEYUKI
IPC分类号： B21B1/26 , B21B37/00 , B21B37/38 , B21B37/42
摘要： PURPOSE:To obtain a rolling cycle so that the target crown can be obtained only by adjusting the bending force of a roll bender without changing a shift position within an endless rolling cycle. CONSTITUTION:In a continuously rolling by joining different kinds of rolled materials with a hot finish rolling mill having the roll bender and a roll shift mechanism, preliminarily a rolling cycle for which a common shift range to each shift range being suitable for the target crown of each rolled stock within the same rolling cycle is present is decided, before the rolling is began, the shift position is set within the common shift range and the crown is controlled by fixing the shift position during rolling on one hand and adjusting the bending force of a roll bender.

14. 发明专利

JPH0639408A METHOD AND EQUIPMENT FOR CONTINUOUSLY HOT ROLLING BILLET 失效
公开(公告)号：JPH0639408A
公开(公告)日：1994-02-15
申请号：JP20107492
申请日：1992-07-28
申请人： KAWASAKI STEEL CO
发明人： TAKEBAYASHI KATSUHIRO , FUJII YUSAKU , ISOBE KUNIO , YARITA YUKIO , TAKASHIMA NORIO
IPC分类号： B21B1/26 , B21B15/00 , B21B45/02 , B21B45/08 , B23K20/00
摘要： PURPOSE:To improve the productivity of continuous hot finish rolling by executing descaling treatment of unjoined faces of a gap at the time of joining treatment of billet just before a scale breaker on the upstream side of a finishing mill group. CONSTITUTION:At the time of continuously executing finish rolling, by joining the rear end part of a preceding billet and the tip part of the successively following billet in the state that the gap is made in the middle part in the breadthwise direction, descaling treatment 3 is executed to the unjoined faces of the gap which is formed at the time of executing the joining treatment of the billets just before the scale breaker 4 which is arranged ranged on the upstream side of the finishing mill group 6. Thus, joining over the whole region in the breadthwise direction of the mutual billets is enabled and stable continuous hot rolling can be attained.

15. 发明专利

JPH0639405A METHOD FOR JOINING BILLET IN CONTINUOUS HOT ROLLING 失效
公开(公告)号：JPH0639405A
公开(公告)日：1994-02-15
申请号：JP19972992
申请日：1992-07-27
申请人： KAWASAKI STEEL CO
发明人： FUJII YUSAKU , TAKEBAYASHI KATSUHIRO , ISOBE KUNIO , YARITA YUKIO
IPC分类号： B21B1/26 , B21B15/00 , B21B45/06 , B23K20/04
摘要： PURPOSE:To improve the productivity of continuous hot rolling by pressurizing/ joining the end parts of billets while cutting them off with a shearing blade blocks with which the overlapped end parts of preceding and following billets are clamped from both sides. CONSTITUTION:At the time of joining the rear end part 2 of a preceding billet and the tip part 3 of the successively following billet on the inlet side of a hot finishing mill group, the end parts of both the following and preceding billets 3, 2 are overlaped and, while cutting off the end parts of the respective billets by mutually approaching a pair of shearing blades 6a, 6b with which the billets are clamped in that overlapped region from both sides, the sheared faces of the respective billets are joined by pressure f3 of the blocks B1, B2 including the shearing blades. In this way, the mutual billets are simply, surely and under high strength joined over the whole in the thickness and breadthwise directions and the high productivity of continuous hot rolling is achieved.

16. 发明专利

JPH0631312A METHOD AND EQUIPMENT FOR CONTINUOUSLY HOT ROLLING BILLET 失效
公开(公告)号：JPH0631312A
公开(公告)日：1994-02-08
申请号：JP19537792
申请日：1992-07-22
申请人： KAWASAKI STEEL CO
发明人： TAKEBAYASHI KATSUHIRO , ISOBE KUNIO , FUJII YUSAKU , YARITA YUKIO , TAKASHIMA NORIO
IPC分类号： B21B1/26 , B21B15/00 , B21B45/06 , B23K20/00
摘要： PURPOSE:To reduce the interposition of oxidized scale and to make the mutual joining between billets stronger by keeping the cut faces of billets in an inert atmosphere or reducing atmosphere from cutting work to joining process. CONSTITUTION:The billets A, B through a roughing mill group 6 are respectively cut with a cutting means 1 into a planar shape so that both ends in the breadthwise direction are brought into contact in the butting state of the respective billets. Thereafter, until the tip part and rear end part of the respective billets are completely joined, the cut faces are kept in the inert atmosphere or the reducing atmosphere and an inert gas or a reducing gas is blown by an atmosphere controlling means 5. The respective billets A, B are brought into contact with each other with a joining means 2 and also the billets are mutually joined over the whole of the joining area in the breadthwise direction of the billets by pressurizing and heating them. After the billets are passed through a scale breaker 3 with which the surface scale is removed, they are fed to a rolling mill group 4 and hot finish rolling is executed. In this way, high productivity and stable rolling is executed.

17. 发明专利

JPH0623406A CONTINUOUS HOT ROLLING METHOD FOR SLABS 失效
公开(公告)号：JPH0623406A
公开(公告)日：1994-02-01
申请号：JP18138092
申请日：1992-07-08
申请人： KAWASAKI STEEL CO
发明人： KOMASHIRO MICHIYA , ISOBE KUNIO , TAKEBAYASHI KATSUHIRO , YARITA YUKIO , TAKASHIMA NORIO
IPC分类号： B21B1/26 , B21B15/00 , B21B27/00 , B21B27/02 , B23K20/00
摘要： PURPOSE:To provide the continuous hot rolling method capable of joining parts of slabs with high strength. CONSTITUTION:After a rear end part of a preceding slab 1 via a rough rolling stage 6 and a tip part of a succeeding slab 2 carried following this slab 1 are cut, respectively by cutting devices 4, parts of the tip part and the rear end part thereof are joined in advance by heating and joining devices 5, then, fed to a finishing mill 3 and unjoined parts are finish-rolled while being rolled and joined at a first stand F1 provided with work rolls of high-speed steel material, by which very stable continuous hot rolling is made possible without causing rupture and separation.

18. 发明专利

JPH05138219A ROLLING METHOD 失效
公开(公告)号：JPH05138219A
公开(公告)日：1993-06-01
申请号：JP31070191
申请日：1991-11-26
申请人： KAWASAKI STEEL CO
发明人： WATANABE YUICHIRO , KENMOCHI KAZUHITO , YARITA YUKIO
IPC分类号： B21B13/14 , B21B31/02 , B21B35/00
摘要： PURPOSE:To carry out stable rolling under high draft by eliminating a difference between horizontal forces which act on upper and lower work rolls by adjusting driving torque in an actual rolling mill in which the error of the center line connecting the axial centers of the upper and lower rolls which comes from machine accuracy exists. CONSTITUTION:Load cells 7 for measuring horizontal force are arranged on the side faces of roll chocks 4a, 4b with which work rolls 2a, 2b are supported. The direction and magnitude of the horizontal forces that act on the roll chocks 4a, 4b are measured with the load cells 4a, 4b. According to the direction and magnitude of the horizontal forces that respectively act on the upper and lower rolls, torques by which respective rolls are driven are adjusted. In this way, horizontal deflections of the work rolls are held at the same order, irregularity in the shape of the rolled stock is prevented and stable and high draft rolling is enabled.

19. 发明专利

JPH0576904A METHOD FOR PREVENTING EDGE CRACK IN COLD ROLLING OF SILICON STEEL SHEET 失效
公开(公告)号：JPH0576904A
公开(公告)日：1993-03-30
申请号：JP23915091
申请日：1991-09-19
申请人： KAWASAKI STEEL CO
发明人： KITAMURA KUNIO , HIRUTA TOSHIKI , YARITA YUKIO
IPC分类号： B21B1/22 , B21B15/00 , B21B27/02 , B21B37/00 , B21B37/28
摘要： PURPOSE:To prevent edge crack and to improve yield by cold tandem rolling a silicon steel sheet whose silicon content is limited under specified conditions. CONSTITUTION:At the time of rolling the silicon steel sheet whose silicon content is >=1.5wt.% with a cold tandem mill, edge grinding treatment that the allowance for grinding is >=0.5mm in the width direction from the edges of sheet is executed just after trimming in the side trimming stage before rolling. At the time of tandem rolling after that, one ends of the work rolls of a 1st stand are made claviform, upper and lower work rolls are arranged so that their axial directions are reverse to each other and they are made to be movable in the axial directions of the work rolls. And also one ends of the work rolls of stands after a 2nd stand are tapered down, upper and lower work rolls are arranged so that their axial directions are reverse to each other and they are made to be movable in the axial directions of the work rolls.

20. 发明专利

JPH0413405A METHOD FOR CONTROLLING BEND AND WEDGE OF ROLLED STOCK IN HOT ROUGH ROLLING AND HOT ROUGH ROLLING EQUIPMENT 失效
公开(公告)号：JPH0413405A
公开(公告)日：1992-01-17
申请号：JP11672590
申请日：1990-05-08
申请人： KAWASAKI STEEL CO
发明人： IGUCHI TAKAO , YAMASHITA MICHIO , ISOBE KUNIO , YARITA YUKIO
IPC分类号： B21B37/00 , B21B37/30 , B21B37/58 , B21B37/68
摘要： PURPOSE:To elevate rolling efficiency and to improve quality and yield by performing control so that a sheet bar is free from both bend and wedge at a rough rolling stage, supplying the sheet bar free from the bend and wedge to a finish rolling stage and restraining meandering in time of the finish rolling. CONSTITUTION:An amount of lateral bends and an amount of wedge after rolled stock 5 is rolled roughly are estimated by measuring an amount Ys of bends and an amount Ws of wedge generated after a preceding rolled stock is rolled roughly. In the 1st correcting pass being a rolling pass except the final rolling pass, parallelism between the upper and lower rolls is adjusted for rolling so that a roll gap is expanded on the side generating these estimated lateral bend. Further, in the 2nd correcting pass being any rolling pass succeeding the 1st corrected pass, the parallelism between the upper and lower rolls is adjusted for rolling so that the roll gap is expanded on the side opposite to the 1st correcting pass. In this way, meandering in the succeeding finish rolling stage can be restrained and quality and yield of the product can be improved.

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