WO2021239163A1 - H-beam flexible rolling rough-rolling pass system and rolling method - Google Patents

H-beam flexible rolling rough-rolling pass system and rolling method Download PDF

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Publication number
WO2021239163A1
WO2021239163A1 PCT/CN2021/109364 CN2021109364W WO2021239163A1 WO 2021239163 A1 WO2021239163 A1 WO 2021239163A1 CN 2021109364 W CN2021109364 W CN 2021109364W WO 2021239163 A1 WO2021239163 A1 WO 2021239163A1
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rolling
pass
flat
rough
rolled
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PCT/CN2021/109364
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French (fr)
Chinese (zh)
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王中学
李超
杨栋
张蕾
赵培林
马强
刘韵嘉
郑力
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山东钢铁股份有限公司
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Publication of WO2021239163A1 publication Critical patent/WO2021239163A1/en

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    • 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
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/08—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process
    • B21B13/12—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process axes being arranged in different planes

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  • the invention relates to the technical field of steel rolling technology, in particular to a H-shaped steel flexible rolling rough rolling pass system and a rolling method.
  • the more efficient and extensive production process used in the hot rolling production process of H-beams is: using profiled billets as blanks, heating them to 1250 ⁇ 1300°C in a heating furnace, and performing multi-pass reciprocating rough rolling on a two-roll roughing mill After rolling, an intermediate billet with a roughly H-shaped shape is produced.
  • the two-roll roughing mill uses rolls with a pass system, and the pass position is changed according to different forming stages for rolling.
  • the intermediate billet formed by rough rolling is processed by a universal rolling mill to reduce and extend the web and flange, and the flange end is processed by an edge rolling machine. In the universal rolling mill, it is composed of horizontal rollers and vertical rollers.
  • the rolling deformation of the web and flange is carried out, the thickness of the web and the flange is controlled, and the width of the flange is controlled in the two-roll edger, and finally the H-shaped steel product rolling is completed. Production.
  • the cross-section diagram and marking symbols of H-beam are shown in Figure 1.
  • the model representation method is height H ⁇ flange width B.
  • There are many types of H-beam for example: 300 ⁇ 300, 390 ⁇ 300, 440 ⁇ 300).
  • the height H value is different, the flange width B, web thickness t1, flange thickness t2 and other dimensions may be the same, that is to say, H is the most important feature of the model, and each H corresponds to a Hi(Hi: H The inside dimension height of section steel).
  • H-beams are rolled by universal rolling mills and edge mills in the finishing rolling stage.
  • the horizontal roll width of the universal rolling mill is fixed. As shown in Figure 2, the horizontal roll width processes the inner height of the H-beam, that is The inner height Hi is fixed, and each type of universal roll with fixed horizontal roll width can only produce one type of H-shaped steel.
  • the width of the horizontal roll is the most important parameter of each type of H-shaped steel in the finishing rolling stage.
  • the pass system of the two-roll roughing mill is designed according to the horizontal roll width of the universal rolling mill in the finishing stage.
  • the width of each horizontal roll corresponds to a set of rough rolling pass system with a fixed height on the inner side of the web. Therefore, each type of H-beam corresponds to a set of roughing mill pass system and finishing mill universal horizontal rolls.
  • the purpose of the present invention is to provide a H-beam flexible rolling rough rolling pass system and rolling method, aiming at the deficiencies and research blanks of the prior art, and solving the problems of frequent roll changes and high production costs in the steel production process.
  • the present invention provides a H-shaped steel flexible rolling rough rolling pass system and rolling method for different types of H-beams with the same flange width (such as H300 ⁇ 300, H390 ⁇ 300, H440 ⁇ 300, etc.), through flat rolling holes
  • the profiled billet is thinned in the web thickness, the flange width is compressed, and the inner width of the web is controlled.
  • the profile billet is vertically pressed through the vertical rolling pass, and the roll reduction is adjusted to reduce the inner height of the web to a different
  • the size can reach the size of the intermediate billet required for the production of different types of H-beams, and realize the same rough rolling mill pass system to produce the intermediate billets required by different types of H-beams, which greatly reduces the number of roll changes and improves production efficiency.
  • a rough-rolled pass system for flexible rolling of H-beams The rough-rolled pass system consists of a flat-rolled pass and a vertical-rolled pass.
  • the flat-rolled pass is used to reduce the web thickness and compress the profile billet.
  • the flange width controls the width of the inner side of the web.
  • the vertical rolling pass is used to press the profiled billet to reduce the height of the inner side of the web to different sizes to obtain the intermediate billets required for the production of different types of H-beams.
  • the groove bottom width of the vertical rolling pass 2 ⁇ the groove depth b of the flat-rolling pass + the web of the largest H-beam intermediate billet thickness.
  • the vertical rolling pass groove depth range be flat-rolled pass groove depth b to flat-rolled pass groove width t.
  • step 2) the intermediate billet produced in step 2) enters the universal rolling mill for finishing rolling, and performs multi-pass rolling.
  • Each rolling pass is rolled by a universal rough rolling mill, an edge rolling mill, and a universal finishing rolling mill. After rolling, H-shaped steel products are finally produced.
  • the heating temperature is controlled at 1250°C to 1300°C, and the heating time is 2 to 4 hours.
  • step 2) first enter the flat-rolled pass to perform 5-9 pass rolling, and after the flat-rolled pass is finished rolling Rotate the rolled piece by 90° and stand it up, enter the vertical rolling pass for 2 to 4 passes, and press the profiled billet through the vertical rolling pass to reduce the height of the inner side of the web to a different size.
  • the total rolling passes are 5-9 rolling passes.
  • each type of H-beam production requires a set of corresponding rough-rolling passes, roughing rolls and
  • the present invention provides a flexible rolling rough rolling pass system and rolling method for H-shaped steel for different types of H-beams with the same flange width (for example, H300 ⁇ 300, H390 ⁇ 300, H440 ⁇ 300, etc.),
  • the rough-rolled pass system includes flat-rolled pass and vertical-rolled pass. The flat-rolled pass is used to reduce the web thickness of the profiled billet, compress the flange width, and control the inner width of the web.
  • Figure 1 is a schematic cross-sectional view of H-shaped steel
  • Figure 2 is a schematic diagram of the rolls of a universal rolling mill
  • Figure 3 shows the rough rolling pass system of the present invention.
  • upper roll 1 rolling groove 11; rolling groove 12; lower roll 2; rolling groove 21; rolling groove 22; roll gap 5; roll gap 6; 7 vertical rod; 8-H section steel;
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate component; It is a wired electrical connection, a radio connection, or a wireless communication signal connection.
  • connection can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate component; It is a wired electrical connection, a radio connection, or a wireless communication signal connection.
  • specific meaning of the above terms can be understood according to specific conditions.
  • a H-beam flexible rolling rough-rolling pass system is provided.
  • the rough-rolling pass system consists of a flat rolling pass D and a vertical rolling pass E
  • the flat rolling pass D is used to reduce the web thickness of the shaped billet, compress the flange width, and control the inner width of the web
  • the vertical rolling pass E is used to press the shaped billet vertically and adjust the rolling pressure. Lower the amount to reduce the inner height of the web to different sizes, and obtain the intermediate billets required for the production of different types of H-beams.
  • the flexible rolling involved in the present invention is mainly the flexible rolling of external dimensions.
  • the blanks of the same type are roughed by the same pass system.
  • a set of roughing mills Multi-model intermediate billet rolling can be completed.
  • the rough rolling mill does not need to change rolls, only the finishing rolling mill needs to be replaced, which greatly reduces the number of roll changes, improves production efficiency, and reduces the number of rolls and production costs.
  • the rolls of the universal rolling mill include two flat rollers and two vertical rollers 7.
  • the two flat rollers are the upper roller 1 and the lower roller 2, and the two flat rollers and two vertical rollers 7 are paired with H-shaped steel 8. Carry out rolling.
  • the rough rolling pass system includes a flat rolling pass D and a vertical rolling pass E.
  • the flat rolling pass D is surrounded by the groove 11 of the upper roll 1, the groove 21 of the lower roll 2, and the roll gap 5 of the rough rolling mill.
  • the cross section of the rolling groove 11 and the rolling groove 21 are symmetrical along the axis AA
  • the upper roller 1 and the lower roller 2 are symmetrical along the axis AA
  • the upper roller 1 can move upward along the axis CC
  • the lower roller 2 can move downward along the axis CC.
  • the vertical rolling pass E is the cross section enclosed by the groove 12 of the upper roll 1 of the roughing mill, the groove 22 of the lower roll 2, and the roll gap 6.
  • the groove 12 and the groove 22 are symmetrical along the AA axis, and the upper roll 1 and The lower roller 2 is symmetrical along the axis AA, the upper roller 1 can move upward along the axis BB, and the lower roller 2 can move downward along the axis BB.
  • the profiled billet is rolled by a two-high roughing mill, so that the inner height of the web is reduced to different sizes, and the intermediate billet size required for the production of different types of H-beams can be achieved.
  • the same rough rolling mill pass system produces the intermediate billets required for different types of H-beams, which greatly reduces the number of roll changes and improves production efficiency.
  • the web thickness of the profiled billet is reduced by the flat rolling pass D, the flange width is compressed, and the inner width of the web is controlled.
  • the profiled billet is vertically pressed by the vertical rolling pass E, and the roll reduction is adjusted to make the inner side of the web.
  • the height is reduced to different sizes, so that it can reach the size of the intermediate billet required for the production of different types of H-beams, so that the same rough rolling mill pass system can produce the intermediate billets required by different types of H-beams, which greatly reduces the number of roll changes and increases production. efficient.
  • flat rolling pass and vertical rolling pass of an embodiment of the present invention are designed as follows:
  • the groove depth b of the flat-rolled pass is B1- ⁇ , where B1 is the half-leg height of the smallest H-shaped steel.
  • the present invention relates to the flange width B of different types of H-beams are all equal, but because the web thickness t1 is not equal, so the half-leg height B1 is not equal, the smallest type H-beam has the largest half-leg height B1, because the value of B1 depends on
  • the groove depth b of the rough-rolled flat-rolled pass, B1 b+ ⁇ ( ⁇ is the amount of extension), so in order to ensure the maximum B1 value, the groove depth b of the flat-rolled pass should be set according to the minimum model H Set the B1 value of the height of the profile steel half leg.
  • the flange width (2b+S) of the intermediate billet obtained after rough rolling is completed, and then enters the finishing mill for rolling.
  • the spread coefficient is generally 0.12 according to the empirical value.
  • the reduction of the finished product after finishing rolling of the intermediate billet is about 40 ⁇ 90mm.
  • the flange spread ⁇ the spread coefficient ⁇ the reduction, which is generally 5mm ⁇ 10mm after calculation. .
  • the present invention relates to H-shaped steels of different section steels.
  • the BH values are not equal, and the BH value is the width of the horizontal roll, which corresponds to the inner dimension height Hi of the H-shaped steel one-to-one.
  • the width BH of the roller is also larger.
  • H-beam adopts widening rolling.
  • the inner height l of the web of the intermediate billet obtained after rough rolling is completed.
  • the t position is 1/2 of the groove depth b of the flat rolling pass.
  • the average extension coefficient ⁇ is about 2.5-10 (for example, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10).
  • the groove bottom width he of the vertical rolling pass 2 ⁇ the rolling groove depth b of the flat rolling pass+the web thickness of the largest H-shaped steel intermediate billet.
  • the vertical rolling pass groove depth range be the rolling groove depth b of the flat rolling pass to the rolling groove width t of the flat rolling pass.
  • the invention also discloses a method for rolling H-shaped steel using the above-mentioned H-shaped steel flexible rolling rough rolling pass system, which includes the following steps:
  • the heating temperature is controlled at 1250°C ⁇ 1300°C, such as 1250°C, 1255°C, 1260°C, 1265°C, 1270°C, 1275°C, 1280°C, 1285°C, 1290°C, 1295°C, 1300°C.
  • the heating time is 2 to 4 hours, such as 2 hours, 2.5 hours, 3 hours, 3.5 hours, 4 hours.
  • the flat rolling pass to perform 5-9 passes of rolling, gradually reduce the roll gap, thin the web thickness, compress the flange width, and control the inner width of the web.
  • the rolled piece is rotated 90° and stood up, enters the vertical-rolled pass for 2 to 4 passes, and presses the profiled billet through the vertical-rolled pass to adjust Roll reduction, gradually reduce the roll gap of the vertical rolling pass, reduce the height of the inner side of the web to different sizes, and obtain the intermediate billets required for the production of different types of H-beams, so that they can meet the requirements for the production of different types of H-beams.
  • the size of the intermediate billet is the first, enter the flat rolling pass to perform 5-9 passes of rolling, gradually reduce the roll gap, thin the web thickness, compress the flange width, and control the inner width of the web.
  • the rolled piece is rotated 90° and stood up, enters the vertical-rolled pass for 2 to 4 passes, and presses the profiled billet through the vertical-rolled pass to adjust Roll reduction, gradually reduce the roll gap of
  • step 2) the intermediate billet produced in step 2) enters the universal rolling mill for finishing rolling, and performs multi-pass rolling.
  • the total rolling pass is 5-9 rolling passes, and H is obtained by reciprocating rolling. Section steel.
  • Each rolling pass is rolled by a universal rough rolling mill, an edge rolling mill and a universal finishing mill rolling, and finally an H-beam product is produced.
  • H-shaped steel H-height, B-flange width, t1-web thickness, t2-flange thickness, Hi-inside dimension height, B1-flange half-leg height.
  • H-beam specification expression method H and height H value ⁇ flange width B value ⁇ web thickness t1 value ⁇ flange thickness t2 value, for example: H300 ⁇ 300 ⁇ 10 ⁇ 15.
  • the rough rolling adopts a two-roll mill
  • the finishing mill adopts a universal rolling mill and an edge rolling mill
  • the billet adopts a special-shaped billet.
  • the H-beam models are H300 ⁇ 300, H390 ⁇ 300, and H440 ⁇ 300.
  • the pass system provided by the present invention is composed of a flat rolling pass D and a vertical rolling pass E.
  • the H-beam rolling method based on the rough rolling mill pass system includes the following steps:
  • Heating Put the shaped blanks into a heating furnace for heating, the heating temperature is controlled at 1250°C to 1280°C, the heating time is 2 to 4 hours, and then out of the furnace for phosphorus removal;
  • a two-roll roughing mill with the flexible rolling pass system is used to roll the profiled billet. First, it enters the flat rolling pass D for 7-pass rolling to gradually reduce the roll gap , The thickness of the web is reduced to 45mm, after the rolling is completed, the steel is turned 90°, the rolled piece is erected, enters the vertical rolling pass E for two-pass rolling, and the shaped billet is vertically pressed through the vertical rolling pass , Adjust the roll reduction, and gradually reduce the vertical rolling pass 2 roll gap, so that the inner height of the web is 397mm (without reduction), 350mm, 261mm;
  • step 2) Finishing rolling: the intermediate billet produced in step 2) enters the universal rolling mill for finish rolling, using H440 ⁇ 300 special universal rolls (horizontal roll width is 407mm) and edge rolls.
  • the total number of rolling passes is 7.
  • Reciprocating rolling produces H440 ⁇ 300 model H-section steel; adopts H390 ⁇ 300 special universal roll (horizontal roll width is 361mm) and edge rolls.
  • the total rolling passes is 5, and H300 ⁇ is produced by reciprocating rolling.
  • Model 300 H-shaped steel; H300 ⁇ 300 special universal roll (horizontal roll width is 272mm) and edge rolls are used.
  • the total number of rolling passes is 5.
  • H300 ⁇ 300 H-shaped steel is produced by reciprocating rolling.
  • the present invention provides a H-beam flexible rolling rough-rolling pass system.
  • the rough-rolling pass system includes a flat-rolled pass D and a vertical-rolled pass E.
  • the flat-rolled pass D performs web thickness reduction and flange
  • the width is compressed and the inner width of the web is controlled, and the vertical rolling pass E is used for vertical compression to reduce the inner height of the web.

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Abstract

Provided is an H-beam (8) flexible rolling rough-rolling pass system and rolling method; the rough rolling pass system is composed of a flat rolling pass (D) and a vertical rolling pass (E); the flat rolling pass (D) is used for thinning the web thickness (t1), compressing the flange width (B), and controlling the inner width of the web of a billet; the vertical rolling pass (E) is used for vertical pressing of the billet, reducing the inner height of the web (1) to different sizes to obtain an intermediate billet required for the production of different types of H-beams (8).

Description

H型钢柔性轧制粗轧孔型系统及轧制方法H-beam flexible rolling rough rolling pass system and rolling method 技术领域Technical field
本发明涉及轧钢工艺技术领域，特别涉及一种H型钢柔性轧制粗轧孔型系统及轧制方法。The invention relates to the technical field of steel rolling technology, in particular to a H-shaped steel flexible rolling rough rolling pass system and a rolling method.
背景技术Background technique
目前，H型钢热轧生产过程中应用较为高效、广泛的生产工艺为：采用异型坯作为坯料，在加热炉中升温至1250～1300℃，在两辊式粗轧机进行多道次往复式粗轧轧制，制得大致形状为H型的中间坯，两辊式粗轧机采用带孔型系统的轧辊，并根据不同的成型阶段更换孔型位置进行轧制。粗轧成形的中间坯，采用万能轧机对腹板和翼缘进行压下和延伸加工，并用轧边机对翼缘端部进行压下加工，在万能轧机中，由水平辊和立辊组成的H型孔型系统中进行腹板和翼缘的轧制变形，控制腹板、翼缘的厚度尺寸，在两辊式轧边机中对翼缘宽度尺寸进行控制，最终完成H型钢成品轧制生产。At present, the more efficient and extensive production process used in the hot rolling production process of H-beams is: using profiled billets as blanks, heating them to 1250～1300℃ in a heating furnace, and performing multi-pass reciprocating rough rolling on a two-roll roughing mill After rolling, an intermediate billet with a roughly H-shaped shape is produced. The two-roll roughing mill uses rolls with a pass system, and the pass position is changed according to different forming stages for rolling. The intermediate billet formed by rough rolling is processed by a universal rolling mill to reduce and extend the web and flange, and the flange end is processed by an edge rolling machine. In the universal rolling mill, it is composed of horizontal rollers and vertical rollers. In the H-shaped pass system, the rolling deformation of the web and flange is carried out, the thickness of the web and the flange is controlled, and the width of the flange is controlled in the two-roll edger, and finally the H-shaped steel product rolling is completed. Production.
H型钢截面图示、标注符号如图1所示，型号表示方法为高度H×翼缘宽度B，H型钢型号繁多(例如：300×300、390×300、440×300)，每种型号的高度H值均有所不同，翼缘宽度B、腹板厚度t1、翼缘厚度t2等尺寸有可能相同，也就是说H是型号的最主要特征，每个H均对应一个Hi(Hi：H型钢内侧尺寸高度)。The cross-section diagram and marking symbols of H-beam are shown in Figure 1. The model representation method is height H×flange width B. There are many types of H-beam (for example: 300×300, 390×300, 440×300). The height H value is different, the flange width B, web thickness t1, flange thickness t2 and other dimensions may be the same, that is to say, H is the most important feature of the model, and each H corresponds to a Hi(Hi: H The inside dimension height of section steel).
H型钢在精轧阶段采用万能轧机和轧边机进行轧制，其中万能轧机的水平辊宽度是固定的，如图2所示，水平辊宽度加工H型钢的内侧高度，也就是说H型钢的内侧高度Hi是固定的，每种固定水平辊宽度的万能轧辊只能生产一种型号的H型钢，水平辊的宽度就是每种型号H型钢在精轧阶段的最主要参数。两辊式粗轧机的孔型系统依据精轧阶段万能轧机的水平辊宽度等尺寸设计，每种水平辊的宽度均对应一套腹板内侧尺寸高度固定的粗轧孔型系统。因此每种型号的H型钢均对应一套粗轧机孔型系统及精轧机万能水平辊。H-beams are rolled by universal rolling mills and edge mills in the finishing rolling stage. The horizontal roll width of the universal rolling mill is fixed. As shown in Figure 2, the horizontal roll width processes the inner height of the H-beam, that is The inner height Hi is fixed, and each type of universal roll with fixed horizontal roll width can only produce one type of H-shaped steel. The width of the horizontal roll is the most important parameter of each type of H-shaped steel in the finishing rolling stage. The pass system of the two-roll roughing mill is designed according to the horizontal roll width of the universal rolling mill in the finishing stage. The width of each horizontal roll corresponds to a set of rough rolling pass system with a fixed height on the inner side of the web. Therefore, each type of H-beam corresponds to a set of roughing mill pass system and finishing mill universal horizontal rolls.
同一套孔型系统及轧辊无法生产不同型号的H型钢，生产不同型号的H型钢时均需进行轧辊的更换，此种生产模式带来一系列问题，比如生产时间、成本大幅增加、无法灵活组织生产多规格小批量订单、生产效率较低等。The same set of pass system and rolls cannot produce different types of H-beams. When producing different types of H-beams, it is necessary to replace the rolls. This production mode brings a series of problems, such as production time, substantial increase in cost, and inability to organize flexibly Production of multiple specifications and small batch orders, low production efficiency, etc.
因此，需要提供一种针对上述现有技术不足的改进技术方案，提高H型钢的生产效率、降低成本。Therefore, there is a need to provide an improved technical solution for the above-mentioned shortcomings of the existing technology to improve the production efficiency of H-section steel and reduce the cost.
发明内容Summary of the invention
本发明的目的在于提供一种H型钢柔性轧制粗轧孔型系统及轧制方法，针对现有技术的不足和研究空白，解决了钢材生产过程中换辊频繁、生产成本高的问题。本发明针对翼缘宽度相同的不同型号H型钢(例如H300×300、H390×300、H440×300等)，提供一种H型钢柔性轧制粗轧孔型系统及轧制方法，通过平轧孔型对异型坯进行腹板厚度减薄、翼缘宽度压缩、控制腹板内侧宽度，通过立轧孔型对异型坯进行立压，调整轧辊压下量，使腹板内侧高度减小至不同的尺寸，使之达到不同型号H型钢生产所需要的中间坯尺寸，实现同一套粗轧机孔型系统生产不同型号H型钢所需的中间坯，大幅减少换辊次数、提高生产效率。The purpose of the present invention is to provide a H-beam flexible rolling rough rolling pass system and rolling method, aiming at the deficiencies and research blanks of the prior art, and solving the problems of frequent roll changes and high production costs in the steel production process. The present invention provides a H-shaped steel flexible rolling rough rolling pass system and rolling method for different types of H-beams with the same flange width (such as H300×300, H390×300, H440×300, etc.), through flat rolling holes The profiled billet is thinned in the web thickness, the flange width is compressed, and the inner width of the web is controlled. The profile billet is vertically pressed through the vertical rolling pass, and the roll reduction is adjusted to reduce the inner height of the web to a different The size can reach the size of the intermediate billet required for the production of different types of H-beams, and realize the same rough rolling mill pass system to produce the intermediate billets required by different types of H-beams, which greatly reduces the number of roll changes and improves production efficiency.
为了实现上述目的，本发明提供如下技术方案：In order to achieve the above objectives, the present invention provides the following technical solutions:
一种H型钢柔性轧制粗轧孔型系统，所述粗轧孔型系统由平轧孔型、立轧孔型组成，所述平轧孔型用于将异型坯减薄腹板厚度、压缩翼缘宽度、控制腹板内侧宽度，所述立轧孔型用于将异型坯进行立压，使腹板内侧高度减小至不同的尺寸，得到不同型号H型钢生产所需要的中间坯。A rough-rolled pass system for flexible rolling of H-beams. The rough-rolled pass system consists of a flat-rolled pass and a vertical-rolled pass. The flat-rolled pass is used to reduce the web thickness and compress the profile billet. The flange width controls the width of the inner side of the web. The vertical rolling pass is used to press the profiled billet to reduce the height of the inner side of the web to different sizes to obtain the intermediate billets required for the production of different types of H-beams.
进一步地，在上述的H型钢柔性轧制粗轧孔型系统中，所述平轧孔型的轧槽深度b＝B1-△，其中，B1为最小型号H型钢半腿高度，△＝5mm～10mm。Further, in the aforementioned H-beam flexible rolling rough-rolling pass system, the groove depth of the flat-rolled pass b=B1-△, where B1 is the minimum H-beam half-leg height, △=5mm~ 10mm.
进一步地，在上述的H型钢柔性轧制粗轧孔型系统中，所述平轧孔型的腹板内侧高度l＝BH-△t，其中，BH为最大型号H型钢万能轧机水平辊的宽度，△t＝10mm～15mm。Further, in the aforementioned H-beam flexible rolling rough-rolling pass system, the inner height of the web of the flat-rolled pass is l=BH-Δt, where BH is the width of the horizontal roll of the largest H-beam universal rolling mill , △t=10mm～15mm.
进一步地，在上述的H型钢柔性轧制粗轧孔型系统中，所述平轧孔型的轧槽宽度t＝最大型号H型钢翼缘厚度t2×精轧阶段平均延伸系数λ，t位置为平轧孔型的轧槽深度的1/2处。Further, in the above-mentioned H-beam flexible rolling rough-rolling pass system, the groove width of the flat-rolled pass is t=maximum type H-beam flange thickness t2×the average elongation coefficient λ in the finishing rolling stage, and the position of t is 1/2 of the groove depth of the flat-rolled pass.
进一步地，在上述的H型钢柔性轧制粗轧孔型系统中，所述立轧孔型的 槽底宽度he＝2×平轧孔型的轧槽深度b+最大型号H型钢中间坯的腹板厚度。Further, in the above-mentioned H-beam flexible rolling rough-rolling pass system, the groove bottom width of the vertical rolling pass = 2×the groove depth b of the flat-rolling pass + the web of the largest H-beam intermediate billet thickness.
进一步地，在上述的H型钢柔性轧制粗轧孔型系统中，所述立轧孔型轧槽深度范围be＝平轧孔型轧槽深度b～平轧孔型的轧槽宽度t。Further, in the above-mentioned H-beam flexible rolling rough-rolling pass system, the vertical rolling pass groove depth range be=flat-rolled pass groove depth b to flat-rolled pass groove width t.
另一方面，提供了一种利用上述的H型钢柔性轧制粗轧孔型系统轧制H型钢的方法，包括如下步骤：On the other hand, there is provided a method for rolling H-shaped steel using the above-mentioned H-shaped steel flexible rolling rough rolling pass system, which includes the following steps:
1)加热：将异型坯装入加热炉中进行加热，然后出炉进行除磷；1) Heating: Put the shaped blanks into a heating furnace for heating, and then take out the furnace for dephosphorization;
2)粗轧：采用上述的柔性轧制孔型系统的两辊式粗轧机对异型坯进行轧制，得到不同型号H型钢生产所需要的中间坯；2) Rough rolling: The two-roll roughing mill of the flexible rolling pass system mentioned above is used to roll the special-shaped billets to obtain the intermediate billets required for the production of different types of H-beams;
3)精轧：对步骤2)制得的中间坯进入万能轧机进行精轧，进行多道次轧制，每轧制道次分别进行万能粗轧机轧制、轧边机轧制及万能精轧机轧制，最终制得H型钢产品。3) Finishing rolling: the intermediate billet produced in step 2) enters the universal rolling mill for finishing rolling, and performs multi-pass rolling. Each rolling pass is rolled by a universal rough rolling mill, an edge rolling mill, and a universal finishing rolling mill. After rolling, H-shaped steel products are finally produced.
进一步地，在上述的轧制H型钢的方法中，在所述步骤1)中，加热温度控制在1250℃～1300℃，加热时间为2～4小时。Further, in the above method for rolling H-section steel, in the step 1), the heating temperature is controlled at 1250°C to 1300°C, and the heating time is 2 to 4 hours.
进一步地，在上述的轧制H型钢的方法中，在所述步骤2)中，首先进入所述平轧孔型进行5～9道次轧制，在所述平轧孔型完成轧制后，将轧件旋转90°并立起，进入所述立轧孔型进行2～4道次轧制，通过立轧孔型对异型坯进行立压，使腹板内侧高度减小至不同的尺寸。Further, in the above-mentioned method of rolling H-section steel, in the step 2), first enter the flat-rolled pass to perform 5-9 pass rolling, and after the flat-rolled pass is finished rolling Rotate the rolled piece by 90° and stand it up, enter the vertical rolling pass for 2 to 4 passes, and press the profiled billet through the vertical rolling pass to reduce the height of the inner side of the web to a different size.
进一步地，在上述的轧制H型钢的方法中，在所述步骤3)中，总轧制道次为5-9个轧制道次。Further, in the above method for rolling H-section steel, in the step 3), the total rolling passes are 5-9 rolling passes.
分析可知，本发明公开一种H型钢柔性轧制粗轧孔型系统及轧制方法，相比现有技术中生产每种型号H型钢均需一套对应的粗轧孔型、粗轧轧辊以及精轧轧辊，本发明针对翼缘宽度相同的不同型号H型钢(例如H300×300、H390×300、H440×300等)，提供一种H型钢柔性轧制粗轧孔型系统及轧制方法，粗轧孔型系统包括平轧孔型以及立轧孔型，通过平轧孔型对异型坯进行腹板厚度减薄、翼缘宽度压缩、控制腹板内侧宽度，通过立轧孔型对异型坯进行立压，调整轧辊压下量，使腹板内侧高度减小至不同的尺寸，使之达到不同型号H型钢生产所需要的中间坯尺寸，实现同一套粗轧机孔型系统生产不同型号H型钢所需的中间坯。在生产翼缘宽度相同但是型号不同的H型钢时，一套粗轧机就可完成多型号的中间坯轧制，粗轧机无需进行换辊，只需更换精轧轧机，大幅减少换辊次数、提高生产效率、降低了轧辊的数量以 及生产成本。The analysis shows that the present invention discloses a H-beam flexible rolling rough-rolling pass system and rolling method. Compared with the prior art, each type of H-beam production requires a set of corresponding rough-rolling passes, roughing rolls and For finishing rolls, the present invention provides a flexible rolling rough rolling pass system and rolling method for H-shaped steel for different types of H-beams with the same flange width (for example, H300×300, H390×300, H440×300, etc.), The rough-rolled pass system includes flat-rolled pass and vertical-rolled pass. The flat-rolled pass is used to reduce the web thickness of the profiled billet, compress the flange width, and control the inner width of the web. Perform vertical pressing and adjust the roll reduction to reduce the inner height of the web to different sizes, so that it can reach the intermediate billet size required for the production of different types of H-beams, and realize the same rough rolling mill pass system to produce different types of H-beams The required intermediate billet. When producing H-beams with the same flange width but different models, a set of roughing mills can complete the rolling of multiple models of intermediate billets. The roughing mill does not need to change rolls, only the finishing mill needs to be replaced, which greatly reduces the number of roll changes and improves Production efficiency, reducing the number of rolls and production costs.
附图说明Description of the drawings
构成本申请的一部分的说明书附图用来提供对本发明的进一步理解，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。其中：The drawings of the specification constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. in:
图1为H型钢的截面示意图；Figure 1 is a schematic cross-sectional view of H-shaped steel;
图2为万能轧机轧辊示意图；Figure 2 is a schematic diagram of the rolls of a universal rolling mill;
图3为本发明的粗轧孔型系统。Figure 3 shows the rough rolling pass system of the present invention.
附图标记说明：上辊1；轧槽11；轧槽12；下辊2；轧槽21；轧槽22；辊缝5；辊缝6；7立棍；8-H型钢；Description of Reference Signs: upper roll 1; rolling groove 11; rolling groove 12; lower roll 2; rolling groove 21; rolling groove 22; roll gap 5; roll gap 6; 7 vertical rod; 8-H section steel;
D-平轧孔型；E-立轧孔型；H-高度；B-翼缘宽度；B1-半腿高度；b-轧槽深度；t-平轧孔型的轧槽宽度；t1-腹板厚度，t2-翼缘厚度；Hi-内侧尺寸高度；l-腹板内侧高度；BH-水平辊的宽度；he-立轧孔型的槽底宽度；be-立轧孔型轧槽深度范围；S-辊缝的厚度。D-flat-rolled pass; E-vertical-rolled pass; H-height; B-flange width; B1-half leg height; b-groove depth; t-groove width of flat-rolled pass; t1-web Plate thickness, t2-flange thickness; Hi-inner dimension height; l-inner web height; BH-horizontal roll width; he-vertical groove bottom width; be-vertical groove depth range ; S-The thickness of the roll gap.
具体实施方式Detailed ways
下面将参考附图并结合实施例来详细说明本发明。各个示例通过本发明的解释的方式提供而非限制本发明。实际上，本领域的技术人员将清楚，在不脱离本发明的范围或精神的情况下，可在本发明中进行修改和变型。例如，示为或描述为一个实施例的一部分的特征可用于另一个实施例，以产生又一个实施例。因此，所期望的是，本发明包含归入所附权利要求及其等同物的范围内的此类修改和变型。Hereinafter, the present invention will be described in detail with reference to the drawings and in conjunction with the embodiments. Each example is provided by way of explanation of the present invention instead of limiting the present invention. In fact, it will be clear to those skilled in the art that modifications and variations can be made in the present invention without departing from the scope or spirit of the present invention. For example, features shown or described as part of one embodiment can be used in another embodiment to yield a still further embodiment. Therefore, it is expected that the present invention includes such modifications and variations that fall within the scope of the appended claims and their equivalents.
在本发明的描述中，术语“纵向”、“横向”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明而不是要求本发明必须以特定的方位构造和操作，因此不能理解为对本发明的限制。本发明中使用的术语“相连”、“连接”、“设置”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接；可以是直接相连，也可以通过中间部件间接相连；可以是有线电连接、无线电连接，也可以是无线通信信 号连接，对于本领域的普通技术人员而言，可以根据具体情况理解上述术语的具体含义。In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", " The orientation or positional relationship indicated by "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention rather than requiring that the present invention must be constructed and operated in a specific orientation, so it cannot be understood as Restrictions on the present invention. The terms "connected", "connected", and "arranged" used in the present invention should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate component; It is a wired electrical connection, a radio connection, or a wireless communication signal connection. For those of ordinary skill in the art, the specific meaning of the above terms can be understood according to specific conditions.
所附附图中示出了本发明的一个或多个示例。详细描述使用了数字和字母标记来指代附图中的特征。附图和描述中的相似或类似标记的已经用于指代本发明的相似或类似的部分。如本文所用的那样，用语“第一”、“第二”和“第三”等可互换地使用，以将一个构件与另一个区分开，且不旨在表示单独构件的位置或重要性。One or more examples of the invention are shown in the attached drawings. The detailed description uses numerical and letter designations to refer to features in the drawings. Similar or similar signs in the drawings and description have been used to refer to similar or similar parts of the present invention. As used herein, the terms “first,” “second,” and “third,” etc. are used interchangeably to distinguish one component from another, and are not intended to indicate the location or importance of individual components .
如图1至图3所示，根据本发明的实施例，提供了一种H型钢柔性轧制粗轧孔型系统，所述粗轧孔型系统由平轧孔型D、立轧孔型E组成，所述平轧孔型D用于将异型坯减薄腹板厚度、压缩翼缘宽度、控制腹板内侧宽度，所述立轧孔型E用于将异型坯进行立压，调整轧辊压下量，使腹板内侧高度减小至不同的尺寸，得到不同型号H型钢生产所需要的中间坯。As shown in Figures 1 to 3, according to an embodiment of the present invention, a H-beam flexible rolling rough-rolling pass system is provided. The rough-rolling pass system consists of a flat rolling pass D and a vertical rolling pass E The flat rolling pass D is used to reduce the web thickness of the shaped billet, compress the flange width, and control the inner width of the web, and the vertical rolling pass E is used to press the shaped billet vertically and adjust the rolling pressure. Lower the amount to reduce the inner height of the web to different sizes, and obtain the intermediate billets required for the production of different types of H-beams.
本发明涉及的柔性轧制主要为外形尺寸柔性轧制，同一型号的坯料，采用同一孔型系统进行粗轧，通过改变不同的辊缝设定，实现不同尺寸中间坯的生产，一套粗轧机就可完成多型号的中间坯轧制，粗轧机无需进行换辊，只需更换精轧轧机，大幅减少换辊次数、提高生产效率、降低了轧辊的数量以及生产成本。The flexible rolling involved in the present invention is mainly the flexible rolling of external dimensions. The blanks of the same type are roughed by the same pass system. By changing different roll gap settings, the production of intermediate billets of different sizes is realized. A set of roughing mills Multi-model intermediate billet rolling can be completed. The rough rolling mill does not need to change rolls, only the finishing rolling mill needs to be replaced, which greatly reduces the number of roll changes, improves production efficiency, and reduces the number of rolls and production costs.
如图2所示，万能轧机的轧辊包括两个平辊和两个立棍7，两个平辊分别是上辊1和下辊2，两个平辊和两个立棍7对H型钢8进行轧制。As shown in Figure 2, the rolls of the universal rolling mill include two flat rollers and two vertical rollers 7. The two flat rollers are the upper roller 1 and the lower roller 2, and the two flat rollers and two vertical rollers 7 are paired with H-shaped steel 8. Carry out rolling.
粗轧孔型系统包括平轧孔型D和立轧孔型E，平轧孔型D是由粗轧机的上辊1的轧槽11、下辊2的轧槽21、辊缝5所围成的断面，轧槽11与轧槽21沿轴线AA对称，上辊1与下辊2沿AA轴线对称，上辊1可沿轴线CC向上移动，下辊2可沿轴线CC向下移动。立轧孔型E由粗轧机的上辊1的轧槽12、下辊2的轧槽22、辊缝6所围成的断面,轧槽12与轧槽22沿AA轴线对称，上辊1与下辊2沿AA轴线对称，上辊1可沿轴线BB向上移动，下辊2可沿轴线BB向下移动。The rough rolling pass system includes a flat rolling pass D and a vertical rolling pass E. The flat rolling pass D is surrounded by the groove 11 of the upper roll 1, the groove 21 of the lower roll 2, and the roll gap 5 of the rough rolling mill. The cross section of the rolling groove 11 and the rolling groove 21 are symmetrical along the axis AA, the upper roller 1 and the lower roller 2 are symmetrical along the axis AA, the upper roller 1 can move upward along the axis CC, and the lower roller 2 can move downward along the axis CC. The vertical rolling pass E is the cross section enclosed by the groove 12 of the upper roll 1 of the roughing mill, the groove 22 of the lower roll 2, and the roll gap 6. The groove 12 and the groove 22 are symmetrical along the AA axis, and the upper roll 1 and The lower roller 2 is symmetrical along the axis AA, the upper roller 1 can move upward along the axis BB, and the lower roller 2 can move downward along the axis BB.
异型坯在本发明提供的粗轧孔型系统内，通过二辊粗轧机进行轧制加工，使腹板内侧高度减小至不同的尺寸，达到不同型号H型钢生产所需要的中间坯尺寸，实现同一套粗轧机孔型系统生产不同型号H型钢所需的中间坯，大幅减少换辊次数、提高生产效率。In the rough rolling pass system provided by the present invention, the profiled billet is rolled by a two-high roughing mill, so that the inner height of the web is reduced to different sizes, and the intermediate billet size required for the production of different types of H-beams can be achieved. The same rough rolling mill pass system produces the intermediate billets required for different types of H-beams, which greatly reduces the number of roll changes and improves production efficiency.
通过平轧孔型D对异型坯进行腹板厚度减薄、翼缘宽度压缩、控制腹板内侧宽度，通过立轧孔型E对异型坯进行立压，调整轧辊压下量，使腹板内侧高度减小至不同的尺寸，使之达到不同型号H型钢生产所需要的中间坯尺寸，实现同一套粗轧机孔型系统生产不同型号H型钢所需的中间坯，大幅减少换辊次数、提高生产效率。The web thickness of the profiled billet is reduced by the flat rolling pass D, the flange width is compressed, and the inner width of the web is controlled. The profiled billet is vertically pressed by the vertical rolling pass E, and the roll reduction is adjusted to make the inner side of the web The height is reduced to different sizes, so that it can reach the size of the intermediate billet required for the production of different types of H-beams, so that the same rough rolling mill pass system can produce the intermediate billets required by different types of H-beams, which greatly reduces the number of roll changes and increases production. efficient.
进一步地，本发明的一实施例的平轧孔型、立轧孔型做了如下的数值设计：Further, the flat rolling pass and vertical rolling pass of an embodiment of the present invention are designed as follows:
所述平轧孔型的轧槽深度b＝B1-△，其中，B1为最小型号H型钢半腿高度。本发明涉及不同型号H型钢的翼缘宽度B均相等，但是因其腹板厚度t1不相等，因此半腿高度B1均不相等，最小型号H型钢的半腿高度B1最大，因B1值取决于粗轧平轧孔型的轧槽深度b，B1＝b+△(△为宽展量)，所以为确保最大B1值，所述平轧孔型的轧槽深度b的设定要依据最小型号H型钢半腿高度B1值进行设定。粗轧完成轧制后所得中间坯的翼缘宽度(2b+S)，进入精轧机组进行轧制，随压下量会产生翼缘宽展△，b＝(B1-△)，此宽展量△一般为5mm～10mm，比如5mm、6mm、7mm、8mm、9mm、10mm。宽展系数按照经验值一般取0.12，中间坯经过精轧轧制得到成品的压下量约40～90mm，翼缘宽展量△＝宽展系数×压下量，经过计算一般为5mm～10mm。The groove depth b of the flat-rolled pass is B1-△, where B1 is the half-leg height of the smallest H-shaped steel. The present invention relates to the flange width B of different types of H-beams are all equal, but because the web thickness t1 is not equal, so the half-leg height B1 is not equal, the smallest type H-beam has the largest half-leg height B1, because the value of B1 depends on The groove depth b of the rough-rolled flat-rolled pass, B1=b+△(Δ is the amount of extension), so in order to ensure the maximum B1 value, the groove depth b of the flat-rolled pass should be set according to the minimum model H Set the B1 value of the height of the profile steel half leg. The flange width (2b+S) of the intermediate billet obtained after rough rolling is completed, and then enters the finishing mill for rolling. With the reduction, the flange width △, b=(B1-△), this width spread The amount △ is generally 5mm-10mm, such as 5mm, 6mm, 7mm, 8mm, 9mm, 10mm. The spread coefficient is generally 0.12 according to the empirical value. The reduction of the finished product after finishing rolling of the intermediate billet is about 40～90mm. The flange spread △=the spread coefficient×the reduction, which is generally 5mm～10mm after calculation. .
所述平轧孔型的腹板内侧高度l＝BH-△t，其中，BH为最大型号H型钢万能轧机水平辊的宽度。本发明涉及不同型钢的H型钢，BH值均不相等，BH值为水平辊宽度，与H型钢内侧尺寸高度Hi一一对应，型号越大，其内侧尺寸高度Hi越大，对应所需的水平辊的宽度BH也越大。H型钢采用扩腰轧制，粗轧完成轧制后所得中间坯的腹板内侧高度l，进入精轧后，经过扩腰轧制后，腹板内侧高度l与万能轧机水平轧辊的宽度BH相同，BH＝l+△t(△t为扩腰量)，所以为确保最大BH值，平轧孔型腹板内侧高度l的设定要依据最大型号H型钢万能轧机水平辊的宽度BH进行设定。粗轧完成轧制后所得中间坯的翼缘内侧高度为l，进入精轧机组进行轧制，产生扩腰量△t，l＝BH-△t，扩腰量△t一般为10mm～15mm，比如10mm、11mm、12mm、13mm、14mm、15mm。此扩腰量可以保证中间坯进行精轧机后具有较佳的咬入效果，也就是说中间坯可以较易进入精轧机，否则咬入效果欠佳。The inner height of the web of the flat-rolled pass is l=BH-Δt, where BH is the width of the horizontal roll of the largest type H-shaped steel universal rolling mill. The present invention relates to H-shaped steels of different section steels. The BH values are not equal, and the BH value is the width of the horizontal roll, which corresponds to the inner dimension height Hi of the H-shaped steel one-to-one. The larger the model, the greater the inner dimension height Hi, corresponding to the required level The width BH of the roller is also larger. H-beam adopts widening rolling. The inner height l of the web of the intermediate billet obtained after rough rolling is completed. After entering the finishing rolling, after the widening rolling, the inner height l of the web is the same as the width BH of the horizontal roll of the universal rolling mill , BH＝l+△t (△t is the amount of waist expansion), so in order to ensure the maximum BH value, the setting of the inner height l of the flat-rolled pass-shaped web should be set according to the width BH of the horizontal roll of the largest H-beam universal rolling mill . After rough rolling, the height of the inner side of the flange of the intermediate billet obtained after the rough rolling is l, and it enters the finishing mill for rolling, resulting in a waist expansion △t, l=BH-△t, and the waist expansion △t is generally 10mm～15mm. For example, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm. This waist expansion can ensure that the intermediate billet has a better biting effect after the finishing mill, which means that the intermediate billet can enter the finishing mill more easily, otherwise the biting effect will be poor.
所述平轧孔型的轧槽宽度t＝最大型号H型钢翼缘厚度t2×精轧阶段平均 延伸系数λ。t位置为平轧孔型的轧槽深度b的1/2处。平均延伸系数λ约在2.5～10之间(比如2.5、3、3.5、4、4.5、5、5.5、6、6.5、7、7.5、8、8.5、9、9.5、10)。The groove width of the flat-rolled pass is t = the largest model H-shaped steel flange thickness t2 × the average elongation coefficient λ in the finishing rolling stage. The t position is 1/2 of the groove depth b of the flat rolling pass. The average extension coefficient λ is about 2.5-10 (for example, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10).
所述立轧孔型的槽底宽度he＝2×平轧孔型的轧槽深度b+最大型号H型钢中间坯的腹板厚度。The groove bottom width he of the vertical rolling pass=2×the rolling groove depth b of the flat rolling pass+the web thickness of the largest H-shaped steel intermediate billet.
所述立轧孔型轧槽深度范围be＝平轧孔型的轧槽深度b～平轧孔型的轧槽宽度t。The vertical rolling pass groove depth range be = the rolling groove depth b of the flat rolling pass to the rolling groove width t of the flat rolling pass.
本发明还公开一种利用上述的H型钢柔性轧制粗轧孔型系统轧制H型钢的方法，包括如下步骤：The invention also discloses a method for rolling H-shaped steel using the above-mentioned H-shaped steel flexible rolling rough rolling pass system, which includes the following steps:
1)加热：将异型坯装入加热炉中进行加热，然后出炉进行除磷；1) Heating: Put the shaped blanks into a heating furnace for heating, and then take out the furnace for dephosphorization;
加热温度控制在1250℃～1300℃，比如1250℃、1255℃、1260℃、1265℃、1270℃、1275℃、1280℃、1285℃、1290℃、1295℃、1300℃。加热时间为2～4小时，比如2小时、2.5小时、3小时、3.5小时、4小时。The heating temperature is controlled at 1250℃～1300℃, such as 1250℃, 1255℃, 1260℃, 1265℃, 1270℃, 1275℃, 1280℃, 1285℃, 1290℃, 1295℃, 1300℃. The heating time is 2 to 4 hours, such as 2 hours, 2.5 hours, 3 hours, 3.5 hours, 4 hours.
2)粗轧：采用上述的柔性轧制孔型系统的两辊式粗轧机对异型坯进行轧制，得到不同型号H型钢生产所需要的中间坯。2) Rough rolling: the two-roll roughing mill of the above-mentioned flexible rolling pass system is used to roll the shaped billets to obtain the intermediate billets required for the production of different types of H-beams.
首先进入所述平轧孔型进行5～9道次轧制，逐步减小辊缝，对腹板厚度进行减薄，翼缘宽度压缩、控制腹板内侧宽度。在所述平轧孔型完成轧制后，将轧件旋转90°并立起，进入所述立轧孔型进行2～4道次轧制，通过立轧孔型对异型坯进行立压，调整轧辊压下量，逐步减小立轧孔型的辊缝，使腹板内侧高度减小至不同的尺寸，得到不同型号H型钢生产所需要的中间坯，使之达到不同型号H型钢生产所需要的中间坯尺寸。First, enter the flat rolling pass to perform 5-9 passes of rolling, gradually reduce the roll gap, thin the web thickness, compress the flange width, and control the inner width of the web. After the flat-rolled pass is finished rolling, the rolled piece is rotated 90° and stood up, enters the vertical-rolled pass for 2 to 4 passes, and presses the profiled billet through the vertical-rolled pass to adjust Roll reduction, gradually reduce the roll gap of the vertical rolling pass, reduce the height of the inner side of the web to different sizes, and obtain the intermediate billets required for the production of different types of H-beams, so that they can meet the requirements for the production of different types of H-beams. The size of the intermediate billet.
3)精轧：对步骤2)制得的中间坯进入万能轧机进行精轧，进行多道次轧制，总轧制道次为5-9个轧制道次，通过往复式轧制得H型钢。每轧制道次分别进行万能粗轧机轧制、轧边机轧制及万能精轧机轧制，最终制得H型钢产品。3) Finishing rolling: the intermediate billet produced in step 2) enters the universal rolling mill for finishing rolling, and performs multi-pass rolling. The total rolling pass is 5-9 rolling passes, and H is obtained by reciprocating rolling. Section steel. Each rolling pass is rolled by a universal rough rolling mill, an edge rolling mill and a universal finishing mill rolling, and finally an H-beam product is produced.
H型钢中：H-高度，B-翼缘宽度，t1-腹板厚度，t2-翼缘厚度，Hi-内侧尺寸高度，B1-翼缘半腿高度。In H-shaped steel: H-height, B-flange width, t1-web thickness, t2-flange thickness, Hi-inside dimension height, B1-flange half-leg height.
H型钢规格表示方法：H与高度H值×翼缘宽度B值×腹板厚度t1值×翼缘厚度t2值，例如：H300×300×10×15。H-beam specification expression method: H and height H value×flange width B value×web thickness t1 value×flange thickness t2 value, for example: H300×300×10×15.
实施例1Example 1
粗轧采用两辊轧机，精轧机采用万能轧机及轧边机，钢坯采用异型坯，H型钢型号为H300×300、H390×300、H440×300。本发明提供的孔型系统由常平轧孔型D和立轧孔型E组成，平轧孔型的轧槽深度b＝138mm；平轧孔型的腹板内侧高度l＝397；平轧孔型的轧槽宽度t＝97mm，立轧孔型的槽底宽度he＝320mm；立轧孔型的轧槽深度120mm。The rough rolling adopts a two-roll mill, the finishing mill adopts a universal rolling mill and an edge rolling mill, and the billet adopts a special-shaped billet. The H-beam models are H300×300, H390×300, and H440×300. The pass system provided by the present invention is composed of a flat rolling pass D and a vertical rolling pass E. The rolling groove depth of the flat rolling pass b=138mm; the inner height of the web of the flat rolling pass l=397; the flat rolling pass The groove width of the vertical rolling pass is t=97mm, the groove bottom width of the vertical rolling pass is equal to 320mm; the groove depth of the vertical rolling pass is 120mm.
基于上述粗轧机孔型系统的H型钢的轧制方法，包括以下步骤：The H-beam rolling method based on the rough rolling mill pass system includes the following steps:
1)加热：将异型坯装入加热炉中进行加热，加热温度控制在1250℃～1280℃，加热时间为2～4小时，然后出炉进行除磷；1) Heating: Put the shaped blanks into a heating furnace for heating, the heating temperature is controlled at 1250°C to 1280°C, the heating time is 2 to 4 hours, and then out of the furnace for phosphorus removal;
2)粗轧：采用带有所述柔性轧制孔型系统的两辊式粗轧机对异型坯进行轧制，首先进入所述平轧孔型D进行7道次轧制，逐步减小辊缝，对腹板厚度减薄至45mm，完成轧制后，翻钢90°，将轧件立起，进入立轧孔型E进行2道次轧制，通过立轧孔型对异型坯进行立压，调整轧辊压下量，逐步减小立轧孔型2辊缝，使腹板内侧高度分别为397mm(无压下)、350mm、261mm；2) Rough rolling: A two-roll roughing mill with the flexible rolling pass system is used to roll the profiled billet. First, it enters the flat rolling pass D for 7-pass rolling to gradually reduce the roll gap , The thickness of the web is reduced to 45mm, after the rolling is completed, the steel is turned 90°, the rolled piece is erected, enters the vertical rolling pass E for two-pass rolling, and the shaped billet is vertically pressed through the vertical rolling pass , Adjust the roll reduction, and gradually reduce the vertical rolling pass 2 roll gap, so that the inner height of the web is 397mm (without reduction), 350mm, 261mm;
2)精轧：对步骤2)制得的中间坯进入万能轧机进行精轧，采用H440×300专用万能轧辊(水平辊宽度为407mm)、轧边辊，总轧制道次为7个，通过往复式轧制制得H440×300型号H型钢；采用H390×300专用万能轧辊(水平辊宽度为361mm)、轧边辊，总轧制道次为5个，通过往复式轧制制得H300×300型号H型钢；采用H300×300专用万能轧辊(水平辊宽度为272mm)、轧边辊，总轧制道次为5个，通过往复式轧制制得H300×300型号H型钢。2) Finishing rolling: the intermediate billet produced in step 2) enters the universal rolling mill for finish rolling, using H440×300 special universal rolls (horizontal roll width is 407mm) and edge rolls. The total number of rolling passes is 7. Reciprocating rolling produces H440×300 model H-section steel; adopts H390×300 special universal roll (horizontal roll width is 361mm) and edge rolls. The total rolling passes is 5, and H300× is produced by reciprocating rolling. Model 300 H-shaped steel; H300×300 special universal roll (horizontal roll width is 272mm) and edge rolls are used. The total number of rolling passes is 5. H300×300 H-shaped steel is produced by reciprocating rolling.
从以上的描述中，可以看出，本发明上述的实施例实现了如下技术效果：From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:
1)本发明提供一种H型钢柔性轧制粗轧孔型系统，粗轧孔型系统包括平轧孔型D以及立轧孔型E，平轧孔型D进行腹板厚度减薄、翼缘宽度压缩、控制腹板内侧宽度，立轧孔型E进行立压，减小腹板内侧高度。1) The present invention provides a H-beam flexible rolling rough-rolling pass system. The rough-rolling pass system includes a flat-rolled pass D and a vertical-rolled pass E. The flat-rolled pass D performs web thickness reduction and flange The width is compressed and the inner width of the web is controlled, and the vertical rolling pass E is used for vertical compression to reduce the inner height of the web.
2)经过本发明提供的H型钢柔性轧制粗轧孔型系统，在生产翼缘宽度相同但是型号不同的H型钢时，一套粗轧机就可完成多型号的中间坯轧制，粗轧机无需进行换辊，只需更换精轧轧机，大幅减少换辊次数、提高生产效率、降低了轧辊的数量以及生产成本。2) Through the H-beam flexible rolling roughing pass system provided by the present invention, when producing H-beams with the same flange width but different types, a set of roughing mills can complete multiple types of intermediate billet rolling without a roughing mill. For roll change, only the finishing mill needs to be replaced, which greatly reduces the number of roll changes, improves production efficiency, and reduces the number of rolls and production costs.
以上所述仅为本发明的优选实施例，并不用于限制本发明，对于本领域 的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The foregoing descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

  1. 一种H型钢柔性轧制粗轧孔型系统，其特征在于，A H-beam flexible rolling rough rolling pass system is characterized in that:
    所述粗轧孔型系统由平轧孔型、立轧孔型组成，The rough rolling pass system is composed of a flat rolling pass and a vertical rolling pass,
    所述平轧孔型用于将异型坯减薄腹板厚度、压缩翼缘宽度、控制腹板内侧宽度，The flat-rolled pass is used to thin the web thickness of the profiled billet, compress the flange width, and control the inner width of the web,
    所述立轧孔型用于将异型坯进行立压，使腹板内侧高度减小至不同的尺寸，The vertical rolling pass is used to press the profiled billet vertically to reduce the height of the inner side of the web to different sizes,
    得到不同型号H型钢生产所需要的中间坯。Obtain the intermediate billets required for the production of different types of H-beams.
  2. 根据权利要求1所述的H型钢柔性轧制粗轧孔型系统，其特征在于，The H-beam flexible rolling rough rolling pass system according to claim 1, characterized in that:
    所述平轧孔型的轧槽深度b＝B1-△，其中，B1为最小型号H型钢半腿高度，△＝5mm～10mm。The groove depth b of the flat-rolled pass is B1-△, where B1 is the half-leg height of the smallest H-section steel, and △=5mm-10mm.
  3. 根据权利要求1所述的H型钢柔性轧制粗轧孔型系统，其特征在于，The H-beam flexible rolling rough rolling pass system according to claim 1, characterized in that:
    所述平轧孔型的腹板内侧高度l＝BH-△t，其中，BH为最大型号H型钢万能轧机水平辊的宽度，△t＝10mm～15mm。The inner height of the web of the flat-rolled pass is l=BH-Δt, where BH is the width of the horizontal roll of the largest type H-shaped steel universal rolling mill, and Δt=10mm-15mm.
  4. 根据权利要求1所述的H型钢柔性轧制粗轧孔型系统，其特征在于，The H-beam flexible rolling rough rolling pass system according to claim 1, characterized in that:
    所述平轧孔型的轧槽宽度t＝最大型号H型钢翼缘厚度t2×精轧阶段平均延伸系数λ，t位置为平轧孔型的轧槽深度的1/2处。The groove width of the flat-rolled pass is t=maximum type H-shaped steel flange thickness t2×the average extension coefficient λ in the finishing rolling stage, and the position t is 1/2 of the groove depth of the flat-rolled pass.
  5. 根据权利要求1所述的H型钢柔性轧制粗轧孔型系统，其特征在于，The H-beam flexible rolling rough rolling pass system according to claim 1, characterized in that:
    所述立轧孔型的槽底宽度he＝2×平轧孔型的轧槽深度b+最大型号H型钢中间坯的腹板厚度。The groove bottom width he of the vertical rolling pass=2×the rolling groove depth b of the flat rolling pass+the web thickness of the largest H-shaped steel intermediate billet.
  6. 根据权利要求1所述的H型钢柔性轧制粗轧孔型系统，其特征在于，The H-beam flexible rolling rough rolling pass system according to claim 1, characterized in that:
    所述立轧孔型轧槽深度范围be＝平轧孔型轧槽深度b～平轧孔型的轧槽宽度t。The vertical rolling groove depth range be = the flat rolling groove depth b to the flat rolling groove width t.
  7. 利用权利要求1-6任一所述的H型钢柔性轧制粗轧孔型系统轧制H型钢的方法，其特征在于，包括如下步骤：The method for rolling H-shaped steel using the H-shaped steel flexible rolling rough-rolling pass system according to any one of claims 1-6 is characterized in that it comprises the following steps:
    1)加热：将异型坯装入加热炉中进行加热，然后出炉进行除磷；1) Heating: Put the shaped blanks into a heating furnace for heating, and then take out the furnace for dephosphorization;
    2)粗轧：采用权利要求1-6任一所述的柔性轧制孔型系统的两辊式粗轧机对异型坯进行轧制，得到不同型号H型钢生产所需要的中间坯；2) Rough rolling: the two-roll roughing mill of the flexible rolling pass system according to any one of claims 1 to 6 is used to roll the shaped billets to obtain the intermediate billets required for the production of different types of H-beams;
    3)精轧：对步骤2)制得的中间坯进入万能轧机进行精轧，进行多道次轧制，每轧制道次分别进行万能粗轧机轧制、轧边机轧制及万能精轧机轧制，最终制得H型钢产品。3) Finishing rolling: the intermediate billet produced in step 2) enters the universal rolling mill for finishing rolling, and performs multi-pass rolling. Each rolling pass is rolled by a universal rough rolling mill, an edge rolling mill, and a universal finishing rolling mill. After rolling, H-shaped steel products are finally produced.
  8. 根据权利要求7所述的轧制H型钢的方法，其特征在于，The method for rolling H-section steel according to claim 7, characterized in that:
    在所述步骤1)中，加热温度控制在1250℃～1300℃，加热时间为2～4小时。In the step 1), the heating temperature is controlled at 1250°C to 1300°C, and the heating time is 2 to 4 hours.
  9. 根据权利要求7所述的轧制H型钢的方法，其特征在于，The method for rolling H-section steel according to claim 7, characterized in that:
    在所述步骤2)中，首先进入所述平轧孔型进行5～9道次轧制，In the step 2), first enter the flat-rolled pass to perform 5-9 passes of rolling,
    在所述平轧孔型完成轧制后，将轧件旋转90°并立起，进入所述立轧孔型进行2～4道次轧制，通过立轧孔型对异型坯进行立压，使腹板内侧高度减小至不同的尺寸。After the flat-rolled pass is finished rolling, the rolled piece is rotated 90° and erected, enters the vertical-rolled pass for 2 to 4 passes, and the profiled billet is vertically pressed through the vertical-rolled pass to make The inside height of the web is reduced to different sizes.
  10. 根据权利要求7所述的轧制H型钢的方法，其特征在于，The method for rolling H-section steel according to claim 7, characterized in that:
    在所述步骤3)中，总轧制道次为5-9个轧制道次。In the step 3), the total rolling passes are 5-9 rolling passes.
PCT/CN2021/109364 2021-03-22 2021-07-29 H-beam flexible rolling rough-rolling pass system and rolling method WO2021239163A1 (en)

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CN112916612A (en) * 2021-03-22 2021-06-08 山东钢铁股份有限公司 H-shaped steel flexible rolling rough rolling pass system and rolling method
CN114042750A (en) * 2021-10-27 2022-02-15 中重科技(天津)股份有限公司 Online width adjusting method for hot-rolled H-shaped steel

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JPS5728601A (en) * 1980-07-25 1982-02-16 Nippon Steel Corp Rolling method for h-beam
JP2000271601A (en) * 1999-03-24 2000-10-03 Kawasaki Steel Corp Manufacture of rough shape billet for wide flange shape
CN202762723U (en) * 2012-06-15 2013-03-06 莱芜钢铁集团有限公司 Embedded slotting layout structure of H-shaped steel cogging roll
CN111468534A (en) * 2020-04-29 2020-07-31 山东德坊新材料科技有限公司 High-strength light H-shaped steel and hot rolling forming process thereof
CN211437481U (en) * 2019-11-05 2020-09-08 河北津西钢铁集团股份有限公司 Hole pattern structure, cogging mill and production line for rolling I-steel by slab
CN112916612A (en) * 2021-03-22 2021-06-08 山东钢铁股份有限公司 H-shaped steel flexible rolling rough rolling pass system and rolling method

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Publication number Priority date Publication date Assignee Title
JPS5728601A (en) * 1980-07-25 1982-02-16 Nippon Steel Corp Rolling method for h-beam
JP2000271601A (en) * 1999-03-24 2000-10-03 Kawasaki Steel Corp Manufacture of rough shape billet for wide flange shape
CN202762723U (en) * 2012-06-15 2013-03-06 莱芜钢铁集团有限公司 Embedded slotting layout structure of H-shaped steel cogging roll
CN211437481U (en) * 2019-11-05 2020-09-08 河北津西钢铁集团股份有限公司 Hole pattern structure, cogging mill and production line for rolling I-steel by slab
CN111468534A (en) * 2020-04-29 2020-07-31 山东德坊新材料科技有限公司 High-strength light H-shaped steel and hot rolling forming process thereof
CN112916612A (en) * 2021-03-22 2021-06-08 山东钢铁股份有限公司 H-shaped steel flexible rolling rough rolling pass system and rolling method

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