WO1995017269A1 - Procede de fabrication de poutres en acier en i - Google Patents

Procede de fabrication de poutres en acier en i Download PDF

Info

Publication number
WO1995017269A1
WO1995017269A1 PCT/JP1994/002123 JP9402123W WO9517269A1 WO 1995017269 A1 WO1995017269 A1 WO 1995017269A1 JP 9402123 W JP9402123 W JP 9402123W WO 9517269 A1 WO9517269 A1 WO 9517269A1
Authority
WO
WIPO (PCT)
Prior art keywords
mill
universal
roll
flange
width
Prior art date
Application number
PCT/JP1994/002123
Other languages
English (en)
Japanese (ja)
Inventor
Yoshiaki Kusaba
Original Assignee
Sumitomo Metal Industries, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Metal Industries, Ltd. filed Critical Sumitomo Metal Industries, Ltd.
Priority to JP7517313A priority Critical patent/JP2943326B2/ja
Priority to AU12007/95A priority patent/AU681219B2/en
Priority to EP95902974A priority patent/EP0736341A4/fr
Priority to KR1019960703285A priority patent/KR100254493B1/ko
Publication of WO1995017269A1 publication Critical patent/WO1995017269A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
    • B21B1/088—H- or I-sections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
    • B21B1/088—H- or I-sections
    • B21B1/0886—H- or I-sections using variable-width rolls

Definitions

  • the present invention relates to a method for hot rolling of high-dimensional precision H-section steel used for construction, and more particularly to hot rolling of a multi-size H-section by hot rolling using a group of universal mills.
  • the building's steel frame is mainly constructed of H-beams. With the rise of buildings, multi-size H-beams and H-beams with high dimensional accuracy have become necessary. However, the gap between the ridges and flanges of hot-rolled H-section steel specified in JIS (Japanese Industrial Standards) is 25 mm, which is rough, 50 mm, and the rolling dimension tolerance is wide. For this purpose, a welded H-section steel is used.
  • Figure 1 is a diagram showing the cross-sectional shape of the H-section steel and the dimensions of each part.
  • H web height, B is the flange width, the web thickness, t 2 is the length of the flange thickness, l, b 2 from ⁇ Ebb to the flange tip.
  • H 500 indicates a web height of 500 mm
  • B 200 indicates a flange width of 200 mm
  • 10 6 indicates a web thickness of lOmmZ and a flange thickness of 16 mm.
  • the dimensional tolerance of welded H-section steel specified by the Japan Steel Structure Association Standard is stricter than that of hot-rolled H-section steel (hereinafter, hot-rolled H-section steel is simply referred to as “H-section steel”).
  • H-section steel hot-rolled H-section steel
  • the tolerance of the web height is ⁇ 1.5 mm for the welded H-section and ⁇ 3.0 omission for the H-section.
  • the appearance may be impaired when the structure is used, and failure may occur in the joints, etc., causing a decrease in strength.
  • the deviation S from the center of the flange of the web S- ⁇ !-B / S in Fig. 1, hereinafter referred to as “web center deviation”
  • the center deviation of the web is ⁇ 2.5 mm for welded H-beams with a web height of 300 mm or more, and ⁇ 3.5 hidden for H-beams.
  • a ⁇ piece or a slab is converted to a dock bone type by a double hole type roll roughing mill (2 Hi-breakdown mill, hereinafter referred to as “2 Hi-BD mill”).
  • 2 Hi-breakdown mill hereinafter referred to as “2 Hi-BD mill”.
  • UR mill universal rough mill
  • 2 Hi-E mill double roll edge yam mill
  • 2 Hi-E mill universal finishing mill
  • Intermediate rolling is performed by reciprocating rolling between the UR mill and the 2 Hi-E mill, and the H-section is finished by one-pass rolling in a UF mill.
  • Etsuja hole types are provided on the roll of the Hi-E mill in the roll width direction.
  • the edge-ear hole type with different web height and flange width H600X200, H550X200, H500X200, or H200X100, H300X150, H400X200, 3 sizes
  • Etc. are engraved on one roll.
  • FIG. 2 is a diagram showing a cross-section of a plurality of cavities and rolled material engraved on the rolls of the 2 Hi-E mill.
  • 5 is the upper edge roll
  • 6 is the lower edge roll
  • of the engraved holes (A) is the hole for H500X200
  • (B) is the hole for H550X200
  • (C) is the hole for H600X200 This shows the hole type.
  • Fig. 3 shows a front view of a roll and a longitudinal section of a rolled material or H-beam to explain the method of manufacturing an H-beam using a 2Hi-E mill for an edger mill.
  • Fig. 3 (a) is a diagram showing the state of rough rolling by an UR mill having upper horizontal roll 1, lower horizontal roll 2, and vertical rolls 3 and 4.At this stage, first, the rough shape of H-section steel is formed. You.
  • FIG. 3 (b) is a diagram showing the state of rough rolling by a 2Hi-E mill having only the upper and lower eager rolls 5,6.
  • one hole type of the roll of FIG. 2 is taken out and shown.
  • the rolls 5 and 6 lower the flange tip 7 of the rolled material to correct the web center deviation of the rolled material.
  • the inner surface of the rolled material flange is constrained by rolls so that the rolled material does not shift in the left-right direction.
  • FIG. 3 (c) is a view showing a state of finish rolling by a UF mill having an upper horizontal roll 8, a lower horizontal roll 9, and vertical rolls 10 and 11.
  • the horizontal rolls 8 and 9 are brought into contact with the web and the inner surface of the flange
  • the vertical rolls 10 and 11 are brought into contact with the outer surface of the flange to perform finish rolling, thereby obtaining an H-section steel having product dimensions.
  • the width of the flange width of the rolled material is not uniform due to the incomplete positioning of the material and the misalignment of the upper and lower horizontal rolls. If there is any deviation, the next 2 Hi-E mill will attempt to correct this, but some flanges will be subjected to strong pressure, and the flanges will buckle and cannot be corrected.
  • FIG. 4 is a front view of a roll and a longitudinal sectional view of a rolled material showing an example in which buckling has occurred in a flange portion in a 2Hi-E mill. Because some flanges bend, The width of the flange cannot be reduced and the center deviation of the web cannot be corrected, and the finish rolling by the UF mill cannot correct the unevenness of the flange width, and returns to the original rough rolling state. As a result, the web center bias cannot be corrected.
  • FIG. 4 shows 4-roll configuration universal type edger mill (hereinafter referred to as "UE mill"). Is shown in cross section. In this example, buckling of the flange as shown in FIG. 4 can be prevented by the action of the vertical roll, so that the effect of correcting the center deviation of the web increases.
  • UE mill 4-roll configuration universal type edger mill
  • the mill was not used in Europe, the United States, or Japan for the following reasons: In other words, in this UE mill, the rolled material is completely constrained and rolled on two horizontal rolls and two vertical rolls. Therefore, when manufacturing different types of H-section steels of various sizes, horizontal rolls are required for each size. It is necessary to keep it, and when manufacturing H-section steels with a constant outer dimension, there is the disadvantage that the number of portals further increases.
  • H-beams of the size corresponding to the load are used for the steel frame of the high-rise building. Therefore, various types of H-beams with different nominal dimensions are manufactured. However, even in the case of a single nominal size H-section steel, the actual height and flange width are different, and using this not only makes joining difficult but also detracts from aesthetics. Manufacture of various types of H-beams with different nominal dimensions requires hole mills and universal mills according to the web height. Many rolling methods have been proposed to reduce the number of these holes. For example, the inventor has already reduced the height of the web using a UF mill (Japanese Patent Application Laid-Open No. 2-84203, US Patent No.
  • Japanese Patent Application Laid-Open Nos. 59-133902, 60-82201, 60-83702, and 60-83702 disclose methods for reducing the web height in intermediate rolling or finish rolling. JP-A-60-1 18301 and JP-A-62-93008 can be mentioned. In addition, Japanese Patent Application Laid-Open Nos.
  • JP-A-61-262403, JP-A-62-161403, and JP-A-61-262402 and JP-A-61-262404 disclose methods of reducing or enlarging the height of a tube. Gazettes.
  • the flange tip is not constrained by the roll and the flange width can be expanded freely. For this reason, especially when the height of the web is reduced, the material flows from the web to the flange, causing the flange width to expand by about 4% or more, increasing the center deviation of the web, and deviating from the tolerance. .
  • a section steel with a constant outer dimension means, for example, as shown in Fig. 1 (a) and), the section height H and the flange width B of multiple H sections are equal, and the web thickness And a series of H-section steel having different flange thickness t 2.
  • H-section steels with constant external dimensions require hole rolls and universal mills according to the web thickness and flange thickness, and reduces the weight of the product by reducing the thickness of the ribs and flanges. Lighter, but more expensive to manufacture. Therefore, conventionally, welded H-section steel has been used as the H-section steel with a constant outer dimension. Disclosure of the invention
  • An object of the present invention is to provide a method for manufacturing a high-dimensional precision H-section steel by hot rolling, and in particular, to provide a group of universal mills of various types of H-section steels having different nominal sizes and H-section steels having a constant outer dimension.
  • An object of the present invention is to provide a method for hot rolling with a dimensional accuracy comparable to that of a welded H-section steel.
  • the gist of the present invention is a method of manufacturing an H-section steel shown in the following (1) to (5), the contents of which will be described based on the line configuration shown in FIG.
  • One mill group in which a universal roughing mill (UR) consisting of four rolls each and a UNIVA sullet jar mill (UE) are placed in close proximity to each other at least in the final stage of the intermediate rolling process
  • the width of the horizontal roll of the universal edger mill is smaller than the width of the horizontal roll of the universal coarse mill, and the outer surface of the flange of the coarse material is universal.
  • a method of manufacturing H-section steel in which the edge roll is constrained by vertical rolls and the tip of the flange is lowered by horizontal rolls.
  • a universal mill having a variable width horizontal roll may be used as the finishing mill.
  • Universal coarse mill consisting of 4 rolls each
  • UT mill group
  • UE saluette jar mill
  • a method of manufacturing H-section steel in which the width of the horizontal roll of the mill is variable, a hole is formed by the horizontal roll and the vertical roll of the universal edge yard mill, the inner and outer surfaces of the flange are constrained by rolls, and the tip of the flange is lowered by the horizontal roll .
  • a universal mill having a variable width horizontal roll may be used as the finishing mill.
  • Figure 1 shows the dimensions of each section of the H-section.
  • FIG. 2 is a diagram showing a cross section of a plurality of cavities and rolled material engraved on a roll of a 2Hi edge mill (2Hi-E mill).
  • FIG. 3 is a front view of a roll and a longitudinal sectional view of a rolled material for explaining a conventional method for rolling an H-section steel.
  • FIG. 4 is a front view of a roll and a longitudinal sectional view of a rolled material showing examples of buckling of a flange and deviation of the center of a web in a conventional agedger mill.
  • FIG. 5 is a diagram showing an H-section steel production line for explaining the method of the present invention.
  • A shows a H-beam production line with a UR mill and a UE mill placed close to each other, and (b) shows an H-beam with a UR mill and a UE mill and a UF mill with variable width horizontal rolls placed close together.
  • Fig. (C) shows the H-section production line in which a UR mill and a UE mill with variable width horizontal rolls are placed in close proximity, and (d) shows a UR mill, UE mill and UF.
  • FIG. 3 is a view showing a production line for an H-section steel in which mills are arranged close to each other and horizontal rolls of variable width are used for a UE mill and a UF mill.
  • FIG. 6 is a diagram illustrating a universal etching mill used in the rolling method of the present invention.
  • FIG. 3 is a front view of a roll and a longitudinal sectional view of the rolled material, showing the shape and positional relationship between each roll and the rolled material (UE mill).
  • Figure 7 shows an example of rolling using a universal edge yard mill (Fig. (A)) and a universal finishing mill (Fig. (B)) equipped with a variable width two-piece horizontal roll. It is a longitudinal cross-sectional view.
  • Fig. 8 is a front view of a horizontal roll and a vertical roll, and a vertical cross-sectional view of a rolled material, showing an example of a variable width two-split horizontal roll of a universal Etsuger mill (UE mill).
  • UE mill universal Etsuger mill
  • FIG. 9 is a diagram showing a cross section of a rough material subjected to test rolling.
  • Figure 10 shows the longitudinal webs of the H-sections of Fig. 9 and their rolled materials. It is a figure which shows the measured value of center deviation.
  • FIG. 11 is a diagram showing the measurement results of the flange width when the web height is reduced by the method of the present invention.
  • FIG. 12 is a diagram showing the dimensional accuracy of various H-section steels obtained in the examples and the manufacturing tolerances of the hot-rolled H-section steel and the welded H-section steel.
  • FIG. 13 is a view showing a hole shape of a roll for a 2Hi breakdown minole (2Hi-BD mill).
  • Fig. 14 is a diagram showing the pass schedule for rolling H-section steel in a 2Hi breakdown mill (2Hi-BD mill).
  • FIG. 15 is a diagram showing a pass schedule when an H-section steel is rolled along the line shown in FIG. 5 (d).
  • FIG. 16 is a diagram showing a cross section of a grooved die and a rolled material engraved on a roll for a 2Hi edge yaminole (2Hi-E mill).
  • Fig. 17 shows the pass schedule when a conventional 2Hi-E mill is used instead of the universal edger mill (UE mill) in the mill line of Fig. 5 (d) as a comparative example and an H-section steel is rolled.
  • UE mill universal edger mill
  • FIG. 18 is a diagram showing the change in the center deviation of the web of the H-section steel in the longitudinal direction of the rolled material.
  • FIG. 5 is a view showing a production line for an H-section steel according to the method of the present invention.
  • Figure (a) shows a line for producing an H-section steel in which a UR mill and a UE mill are arranged close to each other, and (b) shows a horizontal roll of a UF mill in which a UR mill, a UE mill and a UF mill are arranged close to each other.
  • Fig. 1 shows a line for producing H-section steel using variable width rolls.
  • Fig. 3 (c) shows a UR mill and a UE mill placed close to each other.
  • FIG. 3 is a diagram showing a line for manufacturing an H-section steel using rolls.
  • “disposed close to” means a state in which a table roll does not exist between two stands and these stands are arranged continuously.
  • FIG. 6 is a front view of each roll of the UE mill used in the rolling method of the present invention, a longitudinal sectional view showing the shape of the rolled material, and a diagram showing the positional relationship between them.
  • This UE mill is a universal type having an upper edge yah horizontal roll 12, a lower edge yah horizontal roll 13, and vertical rolls 14 and 15.
  • the roll width L of the horizontal rolls 12 and 13 of the UE mill should be smaller than the width of the horizontal roll of the UR mill in the previous process, and the gap between the body inclined portion 21 of the horizontal roll and the inner surface 22 of the rolled material flange
  • the space 16 of ⁇ is provided, and the horizontal surface of the rolled material is not restrained by the horizontal roll.
  • the vertical rolls 14 and 15 restrain the flange outer surface 23, and the horizontal rolls lower the flange tip 7.
  • the roll does not restrain the inner surface of the rolled material flange but only the outer surface, it can prevent the flange from buckling outward when the flange is pressed down in the width direction, and buckling occurs as shown in Fig. 4.
  • the effect of correcting the center deviation of the web is improved.
  • the height of the web is reduced in the final pass of the UE mill, and the web height is different. Can be manufactured with the same UE mill.
  • the UE mill shown in Fig. 6 is placed on the UE mill on the line shown in Fig. 5 (a). A description will be given of the case in which this is done.
  • a continuous green slab or bloom of the material is heated to about 1250 ° C in a heating furnace (not shown), then rolled by a 2 Hi-BD mill, and the raw material of H-section steel ( Beam blank). Next, it is rolled or straightened to predetermined dimensions by reciprocating rolling (intermediate rolling) of 7 to 15 passes by a universal mill group (UT) consisting of a UR mill and a UE mill, and finally, an H-shape of the target dimensions is produced by a UF mill. Finish to steel.
  • UT universal mill group
  • H-shaped steel of H700 X B200 For example, a case where an H-shaped steel of H700 X B200 is manufactured will be described.
  • the horizontal roll of the UR mill has a roll width L of 676 for H700 X B200, and the horizontal roll of the UE mill uses a smaller roll of 566 faces, the roll of H600 X B200 to H700 x H-beams up to B200 can be manufactured.
  • a space (5 ⁇ 50 sleep) will be provided between the horizontal roll of the UE mill and the inner surface of the rolled material flange, so that the flange does not buckle and the web center is not biased.
  • Steel can be manufactured.
  • an H-section steel having excellent dimensional accuracy at the front and rear ends in the longitudinal direction of the rolled material can be obtained.
  • Fig. 7 (a) is a diagram showing the roll width of the UE mill shown in Fig. 6, and Fig. 7 (b) is a front view and rolled material of each roll of a universal finishing mill (UF mill) with a variable width in the horizontal mouth.
  • FIG. Reference numeral 17 denotes a two-part horizontal roll of variable width, and reference numeral 18 denotes a vertical roll.
  • a UF mill using a variable width roll as the horizontal roll shown in FIG. 7 (b) is arranged close to the UE mill as shown in FIG. 5 (b), for example, the following rolling can be performed.
  • the horizontal roll width of the UR mill is 676 (equivalent to the internal dimensions of the web, for H700 XB200) and the horizontal roll width of the UE mill is 566 mm
  • the horizontal roll width of the UF mill is If the width of the steel is variable from 676 mm to 576 mm, three types of H-sections, H700 X B200, H650 x B200 and H600 x B200, can be rolled.
  • the UR mill and UF mill perform reduction in the thickness direction of the web and flange of the rolled material
  • the UE mill performs reduction in the flange width direction
  • the final pass of the UE mill reduces the rib height by 50IM.
  • H-section of H650 XB 200 can be rolled.
  • the height of the tube is reduced by 100I 1 in the final pass of the UE mill and the width of the horizontal opening is changed from 676 to 576 strokes in the final pass of the UF mill, an H600 x B200 H-section can be rolled. .
  • H-section steel with different rib heights have been described.However, if a line for rolling H-section steels with different flange width, web thickness and flange thickness is used, the above method can be used to keep the outer dimension constant. H-section steel can be manufactured. Also, since the horizontal roll width of the UE mill is smaller than the horizontal roll width of the UR mill and the space is provided, no rolling mill for changing the web height is required. There is also an effect.
  • Fig. 8 shows a front view of the variable width horizontal roll and vertical roll of the UE mill and a cross-sectional view of the rolled material. Since the width of such a variable width horizontal roll 19 can be changed on-line, the space 16 (the space existing in the fixed width horizontal roll, (See Fig. 6). Therefore, a hole shape is formed by the horizontal roll and the vertical roll of the UE mill, and the inner and outer surfaces of the flange can be restrained by the roll, and the tip of the flange can be lowered by the horizontal roll, so that the dimensional accuracy can be further improved. In addition, when producing multi-size H-section steel, the number of horizontal rolls of the UE mill can be reduced, and the time required to change rolling rolls can be reduced.
  • the rolling efficiency when used in a line as shown in Fig. 5 (d), in addition to the above dimensional accuracy improvement, the rolling efficiency can be improved by about 50% as described earlier with reference to Fig. 5 (b). .
  • the roll for a normal 2 Hi-E mill For several types of edge pier holes, for example, when the roll body length is 2500 mm, three rolls of the ezja hole for (A): for H500X200, (B): for H550X200, and (C): for H600x200 as described above. It is engraved on.
  • variable width roll for example, H600X200
  • the roll for a 2 Hi-E mill with a 2500 mm long body weighs 20 tons or more, but the weight of a universal horizontal roll is only about 7 tons, and the price is 2 Hi-E even if a variable width mechanism is adopted. This is about 2/3 of the mill roll.
  • a protrusion is provided on the outer peripheral surface of the movable sleeve roll, and the width of the movable sleeve roll is reduced.
  • a male screw is formed at the base end of the sleeve with a key, and the protrusions provided at equal positions on the nut screwed to this male screw are fitted into the protrusion gaps of the movable sleeve roll. May be fixed in the axial direction with a split key.
  • H-beams can also be manufactured using UF mills.
  • an H-section steel can also be manufactured using a universal mill having a horizontal roll having a variable width as described in the above [5] as the UF mill.
  • a UE mill with a variable horizontal roll width can also roll multi-size H-sections with high dimensional accuracy.
  • the effects of the method for manufacturing an H-section steel according to the present invention will be described based on Preliminary Tests 1 and 2, Examples 1 to 6, and Comparative Examples.
  • FIG. 9 is a view showing a vertical cross-sectional shape of a rolled crude material used in a model mill. Stainless steel that does not generate scale at the rolling temperature was used as the rolled raw material so that the finished rolled dimensions could be measured accurately (0.1 stroke units). Rolled raw material is pre-centered in the web
  • Rolling temperature was 900 ° C, number of passes was 1 and flange width reduction was 6%.
  • Fig. 10 shows the longitudinal center of the rolled material and the rolled material obtained in the above test. It is a figure showing a measured value of bias.
  • the chain line indicated by (E) is the case where the roll is rolled using a universal edger mill of the edge yard type II, and the lobe moves about l mm toward the center of the flange. It was improved from 1 band to 0.01 stroke. Further, in FIG.
  • the solid line indicated by (F) indicates that when the method of the present invention described in (3) above is used, the flange is prevented from buckling outward, so that the web is directed toward the center of the flange. It can be seen that it has moved about one distance, the center deviation has been improved from 1 mm to 0.02 mm, and the same effect as when using the edge yard mill (2) (chain line (E)) is obtained.
  • FIG. 6 is a diagram illustrating a change in the length direction of flange radiance measured before and after passing through a UF mill.
  • the broken line (H) shows the change in the flange width after rolling on the UE mill
  • the solid line (J) shows the change in the flange width after rolling on the UF mill.
  • a UE mill as shown in Fig. 6 was placed on the mill line shown in Fig. 5 (a).
  • the horizontal roll of the U E mill is a roll for H800 X B300, and the roll width (L) is 750mm.
  • a test was conducted to produce three types of H-section steel, H25X and H800XB300x1225.
  • the distance between the UR mill and the UE mill was 3m
  • the distance between the UE mill and the UF mill was 120m.
  • the UR mill and UF mill have a horizontal opening width of 850 mm, two UR mills and a UE mill perform seven passes of tandem reverse rolling, and finally one pass of the UF mill.
  • the UE mill there is a space ⁇ 5 between the inner surface of the rolled material flange and the horizontal roll, which is about 50 hidden.
  • H850 x B300 was completed in one pass of the mill.
  • the UE mill there is a space ⁇ 5 of about 25 between the inner surface of the flange of the rolled material and the horizontal roll.
  • the UR mill and UF mill When manufacturing the H800 X B300, the UR mill and UF mill have a horizontal width of 750 mm, and two UR and UE mills perform tandem reverse rolling of 7 passes, and finally, one pass of the UF mill.
  • H800 x B300 At this time, in the UE mill, there is no space 3 between the inner surface of the flange of the rolled material and the horizontal roll.
  • a single UE mill such as H900 XB 300, H850 x B 300, and H800 x B 300, was used.
  • Various types of H-section steel were manufactured.
  • Fig. 12 is a diagram showing the dimensional accuracy of the various H-sections obtained in Examples (1 to 6) and the manufacturing tolerances of the hot-rolled H-sections and the welded H-sections.
  • the dimensional accuracy of the obtained H-section steel was sufficient for the manufacturing tolerances of the welded H-section steel.
  • a horizontal roll (width: 850 images) for H900 x B300 is used for the UR mill, and a horizontal roll (width (L) for H800 x B300) is used for the UE mill. 750 mm) and a horizontal roll (width: 800 mm) for H850 x B300 in a UF mill, and a test was conducted to produce an H-section steel of H850 x B300 x 1225. Assuming that the space section 5 of the UE mill is 50, the UR mill and the UE mill are used to perform 6-bus evening demembours rolling.
  • the web height can be easily reduced in the final pass of the UE mill, and the dimensions of the obtained H-section steel can be reduced.
  • the accuracy was dimensional accuracy that was well within the manufacturing tolerances of the welded H-section steel.
  • a horizontal roll (roll width 850 mm) for H900 x B300 is used for the UR mill, and a horizontal roll (roll width 750 mm) for H800 x B300 is used for the UE mill. ), H850x for UF mill
  • a horizontal roll (fixed roll having a roll width of 800 mm) of a roll for B300 was incorporated into each of them, and a test was conducted to manufacture an H-shaped H850 XB 300 x 1225.
  • the distance between the UR mill, the UE mill and the UF mill was 3 m.
  • the UF mill pass was set as an empty pass that does not perform rolling, and the space 5 of the UE mill was set to 50 strokes and reciprocated rolling was performed between the UR mill and the UE mill. Intermediate rolling to a shape for use.
  • the web height was reduced by 50 mm in the 7th pass of the UE mill to form a shape for H850 x B300, and the H-shaped steel of H850 X B300 x 12/25 was finished in one pass of the UF mill.
  • the horizontal roll width of the UF mill set to 850 mm five passes of tandem reverse rolling were performed using three mills, the UR mill and the UE mill. In the initial four-pass rolling, the UF mill was used as an empty pass, and H900 X B300 was rolled using the UR mill and UE mill.
  • the height of the web was reduced by 50 in the UE mill and rolled into a shape for the H850 XB 300, and the horizontal roll width of the UF mill was reduced to 800 strokes and the H850 x B 300 X 12Z25 Finished in H-section steel.
  • the dimensional accuracy of the obtained H-section steel was better than that of Example 3 as shown in FIG.
  • H-section steels of H500 ⁇ B200 ⁇ 10/16, H550 ⁇ B200 ⁇ 10/16 and H600 ⁇ B200 ⁇ 1016 were rolled using the mill line shown in FIG. 5 (d).
  • the distance between the UR mill, the UE mill and the UF mill should be 3 m.
  • a continuous structure slab having a thickness of 300 mm and a width of 700 mm was used.
  • Fig. 14 is a diagram showing the pass schedule for rolling the H-section steel in a 2Hi breakdown mill (2Hi-BD mill). After heating to 1250 ° C in a heating furnace, using a 2 Hi-BD mill with the hole arrangement shown in Fig. 13, the web schedule is 720 mm according to the pass schedule shown in Fig. 14. Web thickness 60 mm, flange A beam blank (coarse material of H-section steel) with a width of 250 mm and an average flange thickness of 110 mm was formed.
  • the UE mill having a variable width horizontal roll used in this embodiment has a vertical roll with a width of 190 hiding the convex portion in contact with the outer surface of the flange, and a horizontal roll with a hole depth d. 93.5
  • the roll width was set to 468 mm when the distance D between the left and right sleeve rolls 19 'was 0 mm. This interval D can be changed offline or online as described above.
  • H550 X B200 ⁇ When rolling an H-section steel of 10/6, D is set to 50 and horizontal roll width L is 518 hidden, and for H600 B200 X10-16, 100 rolls are used for horizontal rolls.
  • the width L was 568 mm.
  • the structure can be changed up to 120 times.
  • FIG. 15 is a diagram showing a pass schedule when the H shape is rolled along the line shown in FIG. 5 (d).
  • the horizontal roll width of the UR mill is 468 mm, UE at this time
  • the horizontal roll width of the mill was set to 468 mm, which was the same as the former, and an H-section steel of H500 X B200 X 10/16 was manufactured using the pass schedule shown in Fig. 15.
  • the vertical roll does not reduce the flange portion in the thickness direction, and has the same opening as the thickness of the rolled material entrance side.
  • the main purpose of the vertical roll is to prevent the flange from buckling due to the reduction in the flange width of the horizontal roll and to suppress the wall thickness increase at the center of the flange.
  • the reduction ratio in the thickness direction of the flange and web in the UR mill was adjusted between 1.5: 1.0 and 2.0: 1.0.
  • the H-shaped steel of the target size was manufactured by one-pass light rolling in the UF mill.
  • the horizontal roll width of the UR mill was set to 518, the horizontal width of the UE mill and UF mill was increased by 518, and H-section steel of H550 X B200 x 10 16 was manufactured.
  • the horizontal roll width was 568 mm, and the horizontal roll width of the UE mill and UF mill was increased to 568 mm to produce H600 x B200 x 10/16 H-section steel.
  • Figure 12 shows the dimensional change of each part of the obtained H-section steel.
  • the UE mill and UF mill use variable width horizontal rolls, and the UE mill and UF mill reduce the flange while restraining the flange.As shown in Fig. 12, excellent dimensions equivalent to welded H-section steel are shown in Fig. 12. Accuracy was obtained.
  • H500 X B200, H550 x B200, and H600 X B200 were rolled using the mill line shown in Fig. 5 (c).
  • the distance between the UR mill and the UE mill was 3 m
  • the distance between the UE mill and the UF mill was 120 m.
  • the same horizontal rolls for the UR mill and the UE mill as in Example 5 were used, and for rolling three types of H-section steel, the UF mill used horizontal rolls dedicated to each size.
  • the horizontal roll width of UR mill, UE mill and UF mill is 568 mm, and the pressure of both UE mill and UF mill is No reduction in the web height of the rolled material was performed.
  • the horizontal roll width of the UE mill is reduced from 568 mm to 518 in the final pass of the UR mill and UE mill group of the above H600 x B200 rolling, where the web height of the rolled material is obtained.
  • FIG. 16 is a view showing a roll arrangement of a conventional 2 Hi-E mill and a longitudinal section of a rolled material.
  • FIG. 17 is a diagram showing a pass schedule when a conventional 2 Hi-E mill is used as an edge yard mill of the mill line of FIG. 5 (d) as a comparative example and an H-section steel is rolled.
  • the single-hole type shown in Fig. 16 was placed on the ezger mill of the mill line in Fig. 5 (d), and the H-section steel of H500 x B 200 x 10Z16 was drawn. It was manufactured according to the pass schedule shown in FIG. H600 X B200 X 10/16 H-section steel was manufactured in the same manner.
  • Figure 12 shows the dimensional changes of each part of the obtained H-section steel.
  • FIG. 18 is a diagram showing a change in the web center deviation of the H500 ⁇ B200 ⁇ 1016 H-section steel obtained in Example 5 and Comparative Example in the rolling direction.
  • the solid line (K) indicates the line shown in Fig. 5 (d).
  • the dashed line (M) indicates the case where the conventional 2Hi-E mill is arranged and the dashed line (M) is the case where it is manufactured with three universal mills arranged in close proximity.
  • the part where the center deviation S is more than ⁇ 2 mra (manufacturing tolerance of welded H-section steel) is about 30% or more of the pressure elongation in the conventional method, but is 0% in the method of the present invention. It is important to be able to eliminate defects due to center deviation.
  • buckling can be prevented by restraining both sides of the rolled material flange with both vertical rolls of the UE mill and rolling down the flange tip.
  • the flange central portion is preferentially deformed as the flange width is reduced and stretched in the rolling direction, the flange width at the front and rear ends in the longitudinal direction of the rolled material is equal to the central flange width. it can.
  • the dimensional accuracy is improved and the center deviation of the web can be reduced as compared with the case where the conventional 2Hi edge yarn is used.
  • H-section steel with dimensional accuracy comparable to that of section steel can be manufactured.
  • a plurality of H-section steels having different sizes with a dimensional accuracy comparable to that of the welded H-section steel can be manufactured with one set of mills.
  • a conventional 2 Hi edge mill is used. Dimensional accuracy is improved compared to when used, and ⁇ center deviation can be reduced. Moreover, since the height of the web can be easily reduced during rolling,
  • One group of mills can produce multi-size H-sections by hot rolling with dimensional accuracy comparable to that of welded H-sections.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Abstract

L'invention concerne un procédé de fabrication de poutres en acier en I utiles en construction. Selon ce procédé, le laminage intermédiaire des poutres en acier en I se fait dans une unité de laminage (UT) qui contient un laminoir dégrossisseur universel (UR) et un laminoir refouleur universel (UE) situés à proximité l'un de l'autre. Un rouleau horizontal du laminoir refouleur comprime les extrémités libres d'un rebord de la poutre en I. La largeur du rouleau horizontal est inférieure à celle d'un rouleau correspondant du laminoir dégrossisseur et une surface extérieure du rebord est retenue par un rouleau vertical du laminoir refouleur. Le rebord est ensuite comprimé dans la direction de son épaisseur par le rouleau horizontal du laminoir refouleur, dont la largeur est variable, et par un creux de moulage formé par le rouleau horizontal et par le rouleau vertical. On peut ainsi éviter que le rebord ne se gauchisse lorsqu'il est comprimé dans la direction de sa largeur par le laminoir refouleur, et on obtient des poutres d'acier en I de dimensions aussi précises que celles de poutres en acier en I soudées produites par laminage à chaud.
PCT/JP1994/002123 1993-12-20 1994-12-16 Procede de fabrication de poutres en acier en i WO1995017269A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP7517313A JP2943326B2 (ja) 1993-12-20 1994-12-16 Ｈ型鋼の製造方法
AU12007/95A AU681219B2 (en) 1993-12-20 1994-12-16 H-steel manufacturing method
EP95902974A EP0736341A4 (fr) 1993-12-20 1994-12-16 Procede de fabrication de poutres en acier en i
KR1019960703285A KR100254493B1 (ko) 1993-12-20 1994-12-16 H형강의 제조방법

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP31956793 1993-12-20
JP5/319567 1993-12-20

Publications (1)

Publication Number Publication Date
WO1995017269A1 true WO1995017269A1 (fr) 1995-06-29

Family

ID=18111713

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1994/002123 WO1995017269A1 (fr) 1993-12-20 1994-12-16 Procede de fabrication de poutres en acier en i

Country Status (5)

Country Link
EP (1) EP0736341A4 (fr)
JP (1) JP2943326B2 (fr)
KR (1) KR100254493B1 (fr)
AU (1) AU681219B2 (fr)
WO (1) WO1995017269A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0760263A1 (fr) * 1995-03-17 1997-03-05 Sumitomo Metal Industries, Ltd. Procede et dispositif de laminage a chaud d'acier a profil en h

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103862227A (zh) * 2012-12-10 2014-06-18 烟台新科钢结构有限公司 一种波纹腹板h型钢生产的工艺方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5564905A (en) * 1978-11-07 1980-05-16 Sumitomo Metal Ind Ltd Rolling method for wide flange beam using flat billet as blank
JPS574401B2 (fr) * 1976-01-21 1982-01-26
JPS61137601A (ja) * 1984-12-07 1986-06-25 Kawasaki Steel Corp Ｈ形鋼の熱間圧延方法
JPH0364201B2 (fr) * 1983-10-11 1991-10-04 Kawasaki Steel Co

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5550903A (en) * 1978-10-06 1980-04-14 Sumitomo Metal Ind Ltd Rolling method for wide flange beam
JPS5890301A (ja) * 1981-11-24 1983-05-30 Hitachi Zosen Corp 圧延方法
JPS61135404A (ja) * 1984-12-04 1986-06-23 Kawasaki Steel Corp Ｈ形鋼の熱間圧延方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS574401B2 (fr) * 1976-01-21 1982-01-26
JPS5564905A (en) * 1978-11-07 1980-05-16 Sumitomo Metal Ind Ltd Rolling method for wide flange beam using flat billet as blank
JPH0364201B2 (fr) * 1983-10-11 1991-10-04 Kawasaki Steel Co
JPS61137601A (ja) * 1984-12-07 1986-06-25 Kawasaki Steel Corp Ｈ形鋼の熱間圧延方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0736341A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0760263A1 (fr) * 1995-03-17 1997-03-05 Sumitomo Metal Industries, Ltd. Procede et dispositif de laminage a chaud d'acier a profil en h
EP0760263A4 (fr) * 1995-03-17 1999-03-03 Sumitomo Metal Ind Procede et dispositif de laminage a chaud d'acier a profil en h

Also Published As

Publication number Publication date
AU1200795A (en) 1995-07-10
KR100254493B1 (ko) 2000-05-01
AU681219B2 (en) 1997-08-21
EP0736341A4 (fr) 1998-09-30
JP2943326B2 (ja) 1999-08-30
EP0736341A1 (fr) 1996-10-09

Similar Documents

Publication Publication Date Title
JPH08215702A (ja) フランジおよびウェブを有する形鋼の圧延方法および圧延装置列
WO1995017269A1 (fr) Procede de fabrication de poutres en acier en i
US4367642A (en) Method of producing H-beams
JP2738280B2 (ja) 外法一定平行フランジ溝形鋼の製造方法
JP3211331B2 (ja) Ｈ形鋼の熱間圧延方法
RU2088355C1 (ru) Способ изготовления гнутых гофрированных профилей
JP3339466B2 (ja) Ｈ形鋼とその圧延方法
JPH0364201B2 (fr)
JP3339457B2 (ja) Ｈ形鋼の高精度圧延方法
US4393679A (en) Method for producing blank for wide flange beam
JP2681536B2 (ja) 溝形鋼の圧延装置列
JP2861831B2 (ja) 外法一定平行フランジ溝形鋼の圧延方法
JPH091203A (ja) 形鋼の圧延装置およびその装置を用いた形鋼の圧延方法
JPH026001A (ja) 形鋼の圧延方法
JPH0824926B2 (ja) フランジを有する形材の圧延方法
JP2508873B2 (ja) フランジを有する形材の熱間圧延方法
JPS5893501A (ja) Ｈ形粗形鋼片の圧延方法
JP2663806B2 (ja) Ｈ形鋼圧延用エッジャーミルとその圧延方法
JPH0481201A (ja) フランジを有する形材の熱間圧延方法
JPS6293008A (ja) ウエブ高さの調整可能なｈ形鋼の圧延方法
JP2005028442A (ja) コルゲートｈ形鋼、その製造方法及びユニバーサル圧延機
JP3272879B2 (ja) フランジを有する形鋼の圧延方法
JP2002035802A (ja) Ｈ形鋼の圧延方法
JPH09108706A (ja) 左右非対称継手を有する連続継手型形鋼およびその圧延方法
JPH0775724B2 (ja) フランジを有する形材の熱間圧延方法

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU JP KR US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
ENP Entry into the national phase

Ref country code: US

Ref document number: 1996 648199

Date of ref document: 19960524

Kind code of ref document: A

Format of ref document f/p: F

WWE Wipo information: entry into national phase

Ref document number: 1995902974

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1995902974

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1995902974

Country of ref document: EP