CN113828633A - Wide-flange H-shaped steel rolling method - Google Patents
Wide-flange H-shaped steel rolling method Download PDFInfo
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- CN113828633A CN113828633A CN202111115343.9A CN202111115343A CN113828633A CN 113828633 A CN113828633 A CN 113828633A CN 202111115343 A CN202111115343 A CN 202111115343A CN 113828633 A CN113828633 A CN 113828633A
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- 238000005096 rolling process Methods 0.000 title claims abstract description 222
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 46
- 239000010959 steel Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000002994 raw material Substances 0.000 claims abstract description 23
- 230000009467 reduction Effects 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000007688 edging Methods 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 abstract description 6
- 239000002184 metal Substances 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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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
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- 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
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Abstract
The invention provides a wide-flange H-shaped steel rolling method, which comprises the following steps: heating, namely heating the billet raw material; rough rolling, namely roughly rolling the heated billet raw material to obtain an H-shaped intermediate blank; and (3) finish rolling, wherein the intermediate blank is finish rolled, the finish rolling consists of a plurality of universal rolling mills U and edging mills E, and horizontal rollers and/or vertical rollers in the universal rolling mills U are driven to realize large reduction of flanges, so that finished wide-flange H-shaped steel is rolled. The rolling method can fully utilize the billet raw material, breaks through the higher requirements of the traditional method for producing the wide-flange H-shaped steel on the billet raw material and equipment, and has the effects of improving the yield of metal, reducing the processing energy consumption, saving resources and improving the resource utilization rate.
Description
Technical Field
The invention relates to the field of section steel preparation, in particular to a wide-flange H-shaped steel rolling method.
Background
The H-shaped steel is an economic section efficient section with more optimized and reasonable section distribution, and compared with the common I-shaped steel, the H-shaped steel has the advantages of large section modulus, light weight, metal saving, strong bending resistance, light structure dead weight and the like; the wide-flange H-shaped steel has more outstanding advantages in this respect.
At present, H-shaped steel is generally formed in one step by a rolling method, and because the wide-flange H-shaped steel has a large flange, the H-shaped steel is produced by adopting a traditional rolling method, a larger-specification blank raw material is needed, the requirement on equipment capacity is high, and the effective utilization of resources is not facilitated.
Disclosure of Invention
The invention aims to provide a wide-flange H-shaped steel rolling method which can fully utilize a steel blank raw material, breaks through the higher requirements of the traditional method for producing wide-flange H-shaped steel on the steel blank raw material and equipment, and has the effects of improving the yield of metal, reducing the processing energy consumption, saving resources and improving the resource utilization rate.
In order to achieve the above purpose, the invention provides the following technical scheme:
a wide-flange H-shaped steel rolling method is characterized by comprising the following steps:
heating, namely heating the billet raw material;
rough rolling, namely roughly rolling the heated billet raw material to obtain an H-shaped intermediate blank;
and (3) finish rolling, wherein the intermediate blank is finish rolled, the finish rolling consists of a plurality of universal rolling mills U and edging mills E, and horizontal rollers and/or vertical rollers in the universal rolling mills U are driven to realize large reduction of flanges, so that finished wide-flange H-shaped steel is rolled.
Further, in the wide flange H-section rolling method, the billet material may be one of a square billet, a rectangular billet, and an H-shaped beam billet.
Further, in the above rolling method of wide flange H-section, in the rough rolling step, a three-high mill or a two-high mill is used; in the rough rolling step, a straight rolling pass system or a skew rolling pass system is adopted.
Further, in the wide flange H-section rolling method, in the finish rolling step, a universal mill U + edger E + universal mill U mode, or a universal mill U + edger E + universal mill U mode is adopted.
Further, in the wide flange H-section rolling method described above, the universal mill U includes an upper horizontal roll, a lower horizontal roll, and two vertical rolls; in the finish rolling step, an upper horizontal roller of a first universal rolling mill U is a driven roller, a lower horizontal roller and two vertical rollers are driving rollers.
Further, in the wide flange H-section rolling method, in the finish rolling step, the universal rolling mill U other than the first universal rolling mill U is a common universal rolling mill, and both the upper horizontal roll and the lower horizontal roll of the common universal rolling mill are driving rolls, and both the vertical rolls are driven rolls.
Further, in the wide-flange H-section rolling method, in the finish rolling step, it is ensured that the upper horizontal roll and the lower horizontal roll are simultaneously in contact with the web of the H-section blank, and the two vertical rolls are simultaneously in contact with the flange of the intermediate blank.
Further, in the wide-flange H-section rolling method, in the finish rolling step, the two vertical rolls of the first universal rolling mill U perform a large reduction on the flange in the rolling process, where the large reduction means that the reduction of the two vertical rolls of the universal rolling mill U on the flange in the finish rolling stage is greater than 15mm, so as to ensure the growth of the flange.
Further, in the wide flange H-section rolling method, in the finish rolling step, the rolling speed of the horizontal rolls of the universal rolling mill is VHorizontal rollerThe rolling speed of the vertical roll is VVertical roller，VHorizontal rollerAnd VVertical rollerSatisfy
Wherein, VHorizontal rollerGreater than VVertical roller，VVertical rollerGreater than VHorizontal rollerThe extension matching of the rolled piece flange and the web is ensured, and the rolled piece flange and the web are prevented from being torn.
Further, in the above rolling method of wide flange H-section, in the rough rolling step, a straight rolling pass system of a two-roll mill is employed; in the finish rolling step, finish rolling is performed by a universal rolling mill U1, an edge rolling mill E and a universal rolling mill U2 in a universal rolling mill U1+ edge rolling mill E + universal rolling mill U2 mode, an upper horizontal roller of the universal rolling mill U1 is a driven roller, a lower horizontal roller and two vertical rollers are driven, the universal rolling mill U2 is a common universal rolling mill, the upper horizontal roller and the lower horizontal roller of the universal rolling mill U2 are driving rollers, and the two vertical rollers are driven rollers.
The analysis shows that the invention discloses a wide-flange H-shaped steel rolling method, and the production process of the rolling method comprises two stages: and in the rough rolling stage and the finish rolling stage, the billet raw material is rolled into an H-shaped intermediate blank through the heating and rough rolling stages, then the H-shaped intermediate blank is rolled in the finish rolling stage, and a finished wide-flange H-shaped steel product is rolled by matching a plurality of universal rolling mills U with an edge rolling mill E in the finish rolling stage. The rolling method can fully utilize the billet raw material, improve the yield of metal, reduce the processing energy consumption, and play the effects of saving resources and improving the resource utilization rate.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. Wherein:
fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural view of an H-shaped intermediate billet obtained through a rough rolling step.
Fig. 3 shows the pass of a three-high mill of the skew rolling pass system.
Fig. 4 shows the pass of a two-roll mill of a straight pass system.
Description of reference numerals: 1, feeding a horizontal roller; 2, vertical rolls; and 3, lower horizontal rolls.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. The various examples are provided by way of explanation of the invention, and not limitation of the invention. In fact, it will be apparent to those skilled in the art that modifications and variations can be made in the present invention without departing from the scope or spirit thereof. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. It is therefore intended that the present invention encompass such modifications and variations as fall within the scope of the appended claims and equivalents thereof.
In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are for convenience of description of the present invention only and do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected," "connected," and "disposed" as used herein are intended to be broadly construed, and may include, for example, fixed and removable connections; can be directly connected or indirectly connected through intermediate components; the connection may be a wired electrical connection, a wireless electrical connection, or a wireless communication signal connection, and a person skilled in the art can understand the specific meaning of the above terms according to specific situations.
One or more examples of the invention are illustrated in the accompanying drawings. The detailed description uses numerical and letter designations to refer to features in the drawings. Like or similar designations in the drawings and description have been used to refer to like or similar parts of the invention. As used herein, the terms "first," "second," and "third," etc. may be used interchangeably to distinguish one component from another, and are not intended to denote the position or importance of the individual components.
As shown in fig. 1 to 4, according to an embodiment of the present invention, there is provided a wide flange H-section steel rolling method including the steps of:
heating, namely heating the billet raw material; the billet raw material adopts one of a square billet, a rectangular billet or an H-shaped special billet.
Rough rolling, namely roughly rolling the heated billet raw material to obtain an H-shaped intermediate blank; the rough rolling stage can adopt a three-roller mill or a two-roller mill, and adopt a straight rolling pass system or an oblique rolling pass system. In the roughing stage, the flanges are wider than the prior art hole pattern. The flange width is used for realizing large reduction in the finish rolling stage. The pass of the skew rolling pass system is oblique, and the pass of the straight rolling pass system is straight. The skew rolling hole type system is used for a three-roll mill, and the straight rolling hole type system is used for a two-roll mill. The pass of a three-roll mill of a skew pass system is shown in fig. 3, and the pass of a two-roll mill of a straight pass system is shown in fig. 4.
And finish rolling is carried out on the intermediate blank, the finish rolling is carried out on the intermediate blank and comprises a plurality of universal rolling mills U and edging mills E, the universal rolling mills U are provided with upper horizontal rolls 1, lower horizontal rolls 3 and two vertical rolls 2, the horizontal rolls and/or the vertical rolls 2 in the universal rolling mills U are driven to realize large reduction of flanges, and in the embodiment of the invention, the large reduction refers to that the reduction of the flanges by the two vertical rolls 2 of the universal rolling mills U in the finish rolling stage is more than 15 mm. The drive of the universal mill U comprises a motor, a speed reducer, a connecting shaft and the like. The upper horizontal roll 1, the lower horizontal roll 3 and the two vertical rolls 2 of the universal rolling mill U can be driving rolls or driven rolls, and a finished wide-flange H-shaped steel product is rolled by matching a plurality of universal rolling mills U with an edge rolling machine E. In the prior art, two vertical rolls 2 of a universal rolling mill U do not adopt large reduction, the reduction of the flanges is below 10mm, and only H-shaped steel with small-sized flanges can be produced. In the embodiment of the invention, two vertical rolls 2 of the universal mill U adopt H-shaped steel which can produce large-specification flanges under large pressure.
Further, in the finish rolling step, according to the technological requirements of the wide-flange H-shaped steel, a mode of a universal rolling mill U + an edging mill E + a universal rolling mill U, a mode of the universal rolling mill U + the edging mill E + the universal rolling mill U, or a mode of the universal rolling mill U + the edging mill E + the universal rolling mill U is adopted. Which mode is specifically adopted needs to be determined according to the arrangement and the process requirements of the rolling mill. In an embodiment of the present invention, the finish rolling stage has only three rolling mills, and only the universal rolling mill U + edger E + universal rolling mill U mode can be adopted.
Further, in the finish rolling step, the upper horizontal roll 1 of the first universal mill U is a driven roll, the lower horizontal roll 3 and the two vertical rolls 2 are driving rolls. The lower horizontal roll 3 of the first universal rolling mill U is used as a driving roll, so that rolled pieces can be conveniently dragged into a pass to realize rolling. The two vertical rolls 2 of the first universal rolling mill U are used as driving rolls, so that large reduction is conveniently realized, and large reduction is carried out, so that the flange growth is facilitated, the billet raw materials can be fully utilized by the rolling method, the metal yield is improved, the processing energy consumption is reduced, and the effects of saving resources and improving the resource utilization rate are achieved.
Further, in the finish rolling step, the universal rolling mills U except the first universal rolling mill U are common universal rolling mills, the upper horizontal roll 1 and the lower horizontal roll 3 of each common universal rolling mill are drive rolls, and the two vertical rolls 2 are driven rolls. The common universal rolling mill and the edging mill carry out small pressing and flange processing so as to be beneficial to the forming of finished products.
Further, in the finish rolling step, the universal rolling mill U ensures that the upper horizontal roll 1 and the lower horizontal roll 3 are simultaneously contacted with the web of the H-shaped steel blank and the two vertical rolls 2 are simultaneously contacted with the flange of the intermediate blank in the rolling process. The universal mill U is generally used only in the finish rolling stage. When the hole pattern is designed, the distance from the web plate of the rolled piece to the upper horizontal roller 1 and the lower horizontal roller 3 is equal to the distance from the flange of the rolled piece to the vertical roller 2, and the simultaneous contact can be ensured.
Further, in the finish rolling step, two vertical rolls 2 of the first universal rolling mill U perform large reduction on the flange in the rolling process to ensure the growth of the flange. In the H-shaped steel universal rolling mill in the prior art, the vertical roll 2 is a driven roll, and if the vertical roll is pressed down greatly, a rolled piece is easy to tear (namely, the flange and the web of the rolled piece are torn). In the embodiment of the invention, the two vertical rolls 2 of the first universal rolling mill U are driving rolls, and the rolled piece can be prevented from being torn when the rolling mill U is under a high pressure.
Further, in the finish rolling step, the rolling speed of the horizontal rolls (the upper horizontal roll 1 and the lower horizontal roll 3) of the universal rolling mill is VHorizontal rollerThe rolling speed of the vertical roll 2 is VVertical roller，VHorizontal rollerAnd VVertical rollerSatisfy
Wherein, VHorizontal rollerMay be slightly larger than VVertical roller，VVertical rollerMay be slightly larger than VHorizontal rollerThe extension matching of the rolled piece flange and the web is ensured, and the rolled piece flange and the web are prevented from being torn.
Further, in an embodiment of the present invention, in the rough rolling step, a straight pass system of a two-roll mill is adopted; in the finish rolling step, a universal rolling mill U1+ edger E + universal rolling mill U2 mode is adopted, as shown in fig. 1, an upper horizontal roller 1 of a universal rolling mill U1 is a driven roller, a lower horizontal roller 3 and two vertical rollers 2 are both provided with a drive (driving roller), the universal rolling mill U2 is a common universal rolling mill, the upper horizontal roller and the lower horizontal roller of the universal rolling mill U2 are both driving rollers, and the two vertical rollers are both driven rollers.
Example 1: the rolling method of the wide-flange H-shaped steel with the HW 300X 10X 15 specification comprises the following steps:
heating, namely heating the billet raw material; the billet raw material adopts a rectangular billet.
Rough rolling, namely roughly rolling the heated billet raw material to obtain an H-shaped intermediate billet (as shown in figure 2), wherein the specification of the intermediate billet is as follows: h is 355mm, B is 270mm, t1 is 22mm (t1 is the thickness of the thinnest part of the web), t2 is 45mm (t2 is the thickness of the middle position of one side flange of the H-shaped steel); the rough rolling stage adopts a two-roller rolling mill and a straight rolling hole type system.
And (3) finish rolling, wherein the intermediate blank is finish rolled, the finish rolling consists of a universal rolling mill U1, a universal rolling mill U2 and an edge rolling mill E, the universal rolling mill U1+ the edge rolling mill E + the universal rolling mill U2 mode is adopted, and an upper horizontal roll 1 of the universal rolling mill U1 is a driven roll, a lower horizontal roll 3 and vertical rolls 2 on two sides are driving rolls. The universal mill U2 is a common universal mill, the horizontal roll of the universal mill U2 is a driving roll, and the vertical rolls 2 on the two sides are driven rolls. The pressing rules are shown in table 1, and a finished product is finally obtained, the specification of the finished product is HW300 multiplied by 10 multiplied by 15, and the finished product conforms to the specification of wide-flange H-shaped steel on GB/T11263 standard.
TABLE 1 reduction protocol/mm
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
a wide-flange H-shaped steel rolling method comprises the following two stages: and in the rough rolling stage and the finish rolling stage, the billet raw material is rolled into an H-shaped intermediate blank through the heating and rough rolling stages, then the H-shaped intermediate blank is rolled in the finish rolling stage, and a finished wide-flange H-shaped steel product is rolled by matching a plurality of universal rolling mills U with an edge rolling mill E in the finish rolling stage. The rolling method can fully utilize the billet raw material, improve the yield of metal, reduce the processing energy consumption, and play the effects of saving resources and improving the resource utilization rate.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A wide-flange H-shaped steel rolling method is characterized by comprising the following steps:
heating, namely heating the billet raw material;
rough rolling, namely roughly rolling the heated billet raw material to obtain an H-shaped intermediate blank;
and (3) finish rolling, wherein the intermediate blank is finish rolled, the finish rolling consists of a plurality of universal rolling mills U and edging mills E, and horizontal rollers and/or vertical rollers in the universal rolling mills U are driven to realize large reduction of flanges, so that finished wide-flange H-shaped steel is rolled.
2. The wide flange H-section steel rolling method according to claim 1,
the billet raw material adopts one of a square billet, a rectangular billet or an H-shaped special billet.
3. The wide flange H-section steel rolling method according to claim 1,
in the rough rolling step, a three-roller mill or a two-roller mill is adopted;
in the rough rolling step, a straight rolling pass system or a skew rolling pass system is adopted.
4. The wide flange H-section steel rolling method according to claim 1,
in the finish rolling step, a universal mill U + edger E + universal mill U mode is adopted,
or a universal rolling mill U + an edging mill E + a universal rolling mill U mode,
or a universal rolling mill U + an edging mill E + a universal rolling mill U mode.
5. The wide flange H-section steel rolling method according to claim 1,
the universal rolling mill U comprises an upper horizontal roll, a lower horizontal roll and two vertical rolls;
in the finish rolling step, an upper horizontal roller of a first universal rolling mill U is a driven roller, a lower horizontal roller and two vertical rollers are driving rollers.
6. The wide flange H-section steel rolling method according to claim 1,
in the finish rolling step, the universal rolling mills U except the first universal rolling mill U are common universal rolling mills, an upper horizontal roller and a lower horizontal roller of each common universal rolling mill are driving rollers, and two vertical rollers of each common universal rolling mill are driven rollers.
7. The wide flange H-section steel rolling method according to claim 1,
and in the finish rolling step, the upper horizontal roller and the lower horizontal roller are ensured to be simultaneously contacted with the web plate of the H-shaped steel blank, and the two vertical rollers are ensured to be simultaneously contacted with the flange of the intermediate blank.
8. The wide flange H-section steel rolling method according to claim 1,
in the finish rolling step, the two vertical rolls of the first universal rolling mill U carry out large reduction on the flange in the rolling process, and the large reduction means that the reduction of the two vertical rolls of the universal rolling mill U on the flange in the finish rolling stage is larger than 15mm so as to ensure the growth of the flange.
9. The wide flange H-section steel rolling method according to claim 1,
in the finish rolling step, the rolling speed of a horizontal roller of the universal rolling mill is VHorizontal rollerThe rolling speed of the vertical roll is VVertical roller，VHorizontal rollerAnd VVertical rollerSatisfy
Wherein,
Vhorizontal rollerGreater than VVertical roller，VVertical rollerGreater than VHorizontal rollerThe extension matching of the rolled piece flange and the web is ensured, and the rolled piece flange and the web are prevented from being torn.
10. The wide flange H-section steel rolling method according to claim 1,
in the rough rolling step, a straight rolling hole type system of a two-roller rolling mill is adopted;
in the finish rolling step, finish rolling is carried out by a universal rolling mill U1, an edger E and a universal rolling mill U2 in a universal rolling mill U1+ edger E + universal rolling mill U2 mode,
the upper horizontal roll of the universal mill U1 is a driven roll, the lower horizontal roll and two vertical rolls are all driven,
the universal mill U2 is a common universal mill, an upper horizontal roller and a lower horizontal roller of the universal mill U2 are driving rollers, and two vertical rollers are driven rollers.
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| 李文秀: "2005中国钢铁年会论文集 4", 冶金工业出版社, pages: 573 * |
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