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1. 发明专利

JPH04228201A METHOD FOR ROLLING H-SHAPE STEEL WITH HIGH DIMENSIONAL ACCURACY 失效
公开(公告)号：JPH04228201A
公开(公告)日：1992-08-18
申请号：JP40845990
申请日：1990-12-27
申请人： KAWASAKI STEEL CO
发明人： NAGAHIRO HISASHI , KATAYAMA SUSUMU
IPC分类号： B21B1/088 , B21B1/08
摘要： PURPOSE:To improve dimensional accuracy by preventing the variation of flange width and the deviation in the center of webs which are caused at the time of rolling of the H-shape steel. CONSTITUTION:In the early stage of a finishing universal rolling mill, a shaping rolling roll 10 with cavities 11 each in a shape of a bag which surrounds the tip parts of the flanges of the H-shape steel is provided. After the correction of the relative position between the flanges and the webs of the H-shape steel and the shaping of the tips of the flanges are performed with this shaping rolling roll 10, the finishing universal rolling is performed.

2. 发明专利

JPS6221402A ROLLING METHOD FOR FLAT BAR 失效
公开(公告)号：JPS6221402A
公开(公告)日：1987-01-29
申请号：JP15787985
申请日：1985-07-17
申请人： KAWASAKI STEEL CO
发明人： NAGAHIRO HISASHI , TAKEDA SATORU , KAWAMURA ARIHIDE
IPC分类号： B21B1/08
摘要： PURPOSE:To efficiently form a product having an excellet sectional shape at a good yield by rolling a rectangular billet to a prescribed width and rolling down only the central part in the transverse direction at the same instant by a universal mill then rolling down only the transverse ends by horizontal rolls. CONSTITUTION:The stock is rolled to a flat rough shape billet by the breakdown mill 11 which consists of plural box calibers having different caliber widths and flat parts and is usable commonly for multiple series and multiple sizes. Flat vertical rolls 21, 21' and horizontal rolls 22, 22' which are formed to the gradually smaller diameters at the barrel ends of the rolls than at the center with the smooth curves are used for the rolls of the universal mill 11. The billet is rolled to the prescribed width by such mill; at the same time, only the central part in the transverse direction is rolled down in the thickness direction by the rolls 22, 22' and only the ends in the transverse direction which are not rolled down by the mill 12 are rolled down. The product having the excellent sectional shape is thus efficiently formed.

3. 发明专利

JPS5953121B2 失效
公开(公告)号：JPS5953121B2
公开(公告)日：1984-12-24
申请号：JP3150881
申请日：1981-03-05
申请人： KAWASAKI STEEL CO
发明人： YANAGISAWA TADAAKI , TANAKA TERUAKI , YAMASHITA MASASHI , NAGAHIRO HISASHI , OKUMURA HIROSHI , SAITO SHINZO , KUSABA TAKASHI
IPC分类号： B21B1/08 , B21B27/02 , D06M15/673

4. 发明专利

JPS57112902A PRODUCTION OF MULTI-GROOVED BILLET 失效
公开(公告)号：JPS57112902A
公开(公告)日：1982-07-14
申请号：JP18569080
申请日：1980-12-29
申请人： KAWASAKI STEEL CO
发明人： NAGAHIRO HISASHI
IPC分类号： B21B1/02 , B21B1/08 , B21B1/16
摘要： PURPOSE:To obtain plural uniform billets having no surface flaws with the min. number of rolling mills by screwing down a blank material first in its width direction then forming and rolling the same to multi-grooved billets by using one unit of rolling rolls having two kinds of passes. CONSTITUTION:A blank material 27 is screwed down in its width direction by means of the passes 23, 24 of a pair of rolling rolls 21, 22, whereby it is made into a so-called dog bone shape. The width W0 on the bottom side of the passes 23, 24 is set smaller than the thickness H0 of the material 27. Thence, the material 27 is rotated 90 deg., and is rolled with another passes 25, 26 of the rolls 21, 22. The material 27 formed with grooves 31 by the projecting parts 30 of the passes 25, 26 is rotated 90 deg. and is screwed down to B2 by the passes 23, 24, after which it is again rotated 90 deg. and receives rolling of the passes 25, 26, by which the connecting parts are cut and desired multiple grooves of billets are obtained. The side faces 35, 35' of the material 27 are screwed down and the material is well filled in the top and bottom directions of the passes 25, 26; therefore, the products have no surface flaws and have extremely less variances in dimension and shape.

5. 发明专利

JPS56126002A ROLLING METHOD FOR ASYMMETRIC STEEL SHAPE 失效
公开(公告)号：JPS56126002A
公开(公告)日：1981-10-02
申请号：JP2848880
申请日：1980-03-06
申请人： KAWASAKI STEEL CO
发明人： NAGAHIRO HISASHI , TANAKA TERUAKI , YAMANAKA EISUKE
IPC分类号： B21B1/08 , B21B1/088
摘要： PURPOSE:To correct the offset of the web and the flange of an asymmetric steel shape for the purpose of obtaining the product steel shape in the aimed size, by specifying the roll size for the shape reforming mill to be installed successively to the universal mill. CONSTITUTION:In an asymmetric H-beam 40 on the run-out side of the universal mill, the leg length B1 of the upper thin-walled flange 40 is made longer than the leg length B2 of the lower thick-walled flange 50. Owing to this difference between upper and lower leg lengths B1 and B2, when this H-beam is rolled by the shape reforming mill 39, the upper face 48 of the web 46 and the tip 52 of the lower flange 50 make contact with the upper and lower rolls at first; hereby, a shearing force is applied to the connecting part between the web 46 and the flange 50 so that the web 46 is correctively shifted downward and the flange 50 is correctively shifted upward. As a result, by adjusting the roll gap E to a range not to reduce the thickness of the web 46, the leg length B2 of the lower flange 50 is made nearly the size A2 and the leg length B1 of the upper flange 40 is made nearly the size A1 in order to equalize the leg lengths of upper and lower flanges.

6. 发明专利

JPS5497564A PRODUCTION OF CHANNEL STEEL 失效
公开(公告)号：JPS5497564A
公开(公告)日：1979-08-01
申请号：JP473878
申请日：1978-01-18
申请人： KAWASAKI STEEL CO
发明人： NAGAHIRO HISASHI
IPC分类号： B21B1/10 , B21B1/08 , B21B1/095

7. 发明专利

JPS5490017A METHOD OF MAKING ROUGHHSHAPED H STEEL BILLET 失效
公开(公告)号：JPS5490017A
公开(公告)日：1979-07-17
申请号：JP15905177
申请日：1977-12-28
申请人： KAWASAKI STEEL CO
发明人： NAGAHIRO HISASHI
IPC分类号： B22D11/12 , B21B1/08 , B21B1/46 , B22D11/00 , B22D11/04 , B22D11/128

8. 发明专利

JP2000135501A METHOD OF MANUFACTURING H-SHAPED STEEL 失效
公开(公告)号：JP2000135501A
公开(公告)日：2000-05-16
申请号：JP30836598
申请日：1998-10-29
申请人： KAWASAKI STEEL CO
发明人： NAGAHIRO HISASHI
IPC分类号： B21B1/088 , B21B1/08
摘要： PROBLEM TO BE SOLVED: To prevent waving of the flange and web portions and improve dimensional/shape accuracy by adjusting the roll interval of a rough-rolling mill so that the ratio of sectional areas of a web equivalent portion and a flange equivalent portion of a rough-rolled material will be a specified times of the ratio of sectional areas of a web equivalent portion and a flange equivalent portion of a product. SOLUTION: (SWR/SFR)=0.9 to 1.1×(SWF/SFF). In formulas I to IV, SWR: a sectional area of a web equivalent portion of a rolled material, SFR: a sectional area of a flange equivalent portion of the rolled material, SWF: a sectional area of a web equivalent portion of a product, SFF: sectional area of a flange equivalent portion of the product, Bk: width of the rolled material, Wh: width of horizontal roll to be used for first rolling, Tw: average value of web thickness of the rolled material, A0: total sectional area of the rolled material, H: target web height of product, B: target flange width of the product, tf: target flange thickness of the product, tw: target web thickness of the product.

9. 发明专利

JPH10192905A MANUFACTURE OF U-SHAPE STEEL SHEET PILE 失效
公开(公告)号：JPH10192905A
公开(公告)日：1998-07-28
申请号：JP34990296
申请日：1996-12-27
申请人： KAWASAKI STEEL CO
发明人： NAGAHIRO HISASHI
IPC分类号： E02D5/04 , B21B1/08 , B21B1/082
摘要： PROBLEM TO BE SOLVED: To manufacture the Laruddrn type U-shape steel sheet pile with improved rolling efficiency and excellent in a stable joint dimension by using a crude ingot manufactured by continuous casting, having a H-shaped cross-section as a rolling stock. SOLUTION: In the ingot having the H-shaped cross-section as the rolling stock 20, the cross-sections of the upper and the lower flanges 33, 34 of left and right on both sides of a web 31, have been precisely portioned out on both sides of the left and the right of the web 31 at the time of the casting of the continuous casting. Therefore, a difference between the left and the right joint dimensions of a final product, can be made very small. Also, by using the continuous casting ingot 20 having the H-shaped cross-section, the portioning-out process of the initial cross-section of a base stock, can be omitted. In addition, the thickness of a part corresponding to the web 31 of the base stock, has been formed thinner than a rectangular cross-section, and the drawing down process of the part corresponding to the web 31 can be reduced. A reduction in the frequency of pass and the reductions in grooved rolls 21 to 27 can be expected. Further, these have effects such as the reduction of a capital investment, the shortening of a time required for rolling and the improvement of productivity.

10. 发明专利

JPH03138039A METHOD AND APPARATUS FOR BENDING PROJECTING LINE IN MANUFACTURING EQUIPMENT OF DOVETAIL GROOVED FLAT STEEL 失效
公开(公告)号：JPH03138039A
公开(公告)日：1991-06-12
申请号：JP21380989
申请日：1989-08-19
申请人： KAWASAKI STEEL CO
发明人： NAGAHIRO HISASHI
IPC分类号： B21B1/08 , B21B39/16 , B21H7/00 , B21H8/00
摘要： PURPOSE:To efficiently turn down and bend projecting lines by providing plural grooves in parallel with the lengthwise direction and projecting lines on both edges of each groove on one surface of a flat steel stock of square section and actuating applied pressure toward the groove side on each projecting line stepwise with plural upper and lower horizontal rollers. CONSTITUTION:Plural grooves K2 are provided in parallel on one surface of a rolled intermediate product K, projecting lines K3 are formed on both groove edges of each groove K2 and the other surface is made a flat surface. Regarding the bending of this intermediate product K, the initial turning-down and bending treatment to the projecting lines K3 is given by an initial stage guide roller composed of an initial stage upper horizontal roller 2a and an initial stage lower horizontal roller 5a. Then, bending treatment which turns down the projecting lines K3 to the side of the facing groove K2 is given by an intermediate stage guide roller composed of an intermediate stage upper horizontal roller 26 and an intermediate stage lower horizontal roller 5b. Finally, bending treatment which tumbles and positions the projecting lines K3 completely in the grooves K2 is given by a final stage guide roller composed of a final stage upper horizontal roller 2C and a final stage lower horizontal roller 5C to obtain a formed product K1.

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