CN113828633B - Rolling method of wide flange H-shaped steel - Google Patents
Rolling method of wide flange H-shaped steel Download PDFInfo
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- CN113828633B CN113828633B CN202111115343.9A CN202111115343A CN113828633B CN 113828633 B CN113828633 B CN 113828633B CN 202111115343 A CN202111115343 A CN 202111115343A CN 113828633 B CN113828633 B CN 113828633B
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- 238000005096 rolling process Methods 0.000 title claims abstract description 228
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 49
- 239000010959 steel Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000002994 raw material Substances 0.000 claims abstract description 22
- 238000007688 edging Methods 0.000 claims abstract description 19
- 230000009467 reduction Effects 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000012545 processing 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
- 230000000694 effects Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design 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
- 238000002360 preparation method Methods 0.000 description 1
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
- 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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- Engineering & Computer Science (AREA)
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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 rough rolling the heated billet raw material to obtain an H-shaped intermediate blank; finish rolling is carried out on the intermediate blank, the finish rolling comprises a plurality of universal rolling mills U and an edging mill E, and horizontal rollers and/or vertical rollers in the universal rolling mill U are driven to realize large reduction of flanges, so that a wide flange H-shaped steel finished product 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, plays the roles 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 high-efficiency 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 structural dead weight and the like; the advantages of wide flange H-section steel are more pronounced in this regard.
At present, H-shaped steel is generally formed at one time by a rolling method, and because the flange of the wide flange H-shaped steel is larger, the wide flange H-shaped steel is produced by adopting a traditional rolling method, and blank raw materials with larger specification are required, so that 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 billet raw materials, break through the higher requirements of the traditional method for producing the wide flange H-shaped steel on the billet raw materials and equipment, improve the yield of metal, reduce the processing energy consumption and achieve the effects of saving resources and improving the utilization rate of the resources.
In order to achieve the above object, the present invention provides the following technical solutions:
the wide flange H-shaped steel rolling method is characterized by comprising the following steps of:
heating, namely heating the billet raw material;
rough rolling, namely rough rolling the heated billet raw material to obtain an H-shaped intermediate blank;
finish rolling is carried out on the intermediate blank, the finish rolling comprises a plurality of universal rolling mills U and an edging mill E, and horizontal rollers and/or vertical rollers in the universal rolling mill U are driven to realize large reduction of flanges, so that a wide flange H-shaped steel finished product is rolled.
Further, in the wide flange H-section steel rolling method, the billet material is one of square billet, rectangular billet and H-shaped profiled billet.
Further, in the wide flange H-section steel rolling method described above, 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 diagonal rolling pass system is adopted.
Further, in the wide flange H-section steel rolling method, in the finish rolling step, a universal rolling mill u+a edging mill e+a universal rolling mill U mode, or a universal rolling mill u+a edging mill e+a universal rolling mill U mode is adopted.
Further, in the wide flange H-section steel rolling method, the universal rolling mill U includes an upper horizontal roller, a lower horizontal roller, and two vertical rollers; in the finish rolling step, the upper horizontal roller of the first universal rolling mill U is a driven roller, the lower horizontal roller and the two vertical rollers are driving rollers.
Further, in the wide flange H-section steel rolling method, in the finish rolling step, the other universal rolling mills U except the first universal rolling mill U are common universal rolling mills, the upper horizontal roller and the lower horizontal roller of the common universal rolling mill are driving rollers, and the two vertical rollers are driven rollers.
Further, in the wide flange H-section rolling method described above, in the finish rolling step, it is ensured that the upper horizontal roller and the lower horizontal roller are simultaneously in contact with the web of the H-section bar blank, and the two vertical rollers are simultaneously in contact with the flange of the intermediate blank.
In the wide flange H-section steel rolling method, in the finish rolling step, the two vertical rolls of the first universal rolling mill U press the flange under a large pressure in the rolling process, wherein the large pressure refers to a reduction of the flange by the two vertical rolls of the universal rolling mill U in the finish rolling stage of more than 15mm, so as to ensure the growth of the flange.
Further, in the wide flange H-section steel rolling method, in the finish rolling step, the rolling speed of the horizontal rolls of the universal rolling mill is V Horizontal roller The rolling speed of the vertical roll is V Vertical roller ，V Horizontal roller And V Vertical roller Satisfies the requirements therebetweenWherein V is Horizontal roller Greater than V Vertical roller ，V Vertical roller Greater than V Horizontal roller The extension matching of the flange and the web of the rolled piece is ensured, and the tearing of the flange and the web of the rolled piece is avoided.
Further, in the wide flange H-section steel rolling method, in the rough rolling step, a direct rolling pass system of a two-roll mill is adopted; in the finish rolling step, the finish rolling comprises a universal rolling mill U1, an edging mill E and a universal rolling mill U2, a mode of the universal rolling mill U1, the edging mill E and the universal rolling mill U2 is adopted, an upper horizontal roller of the universal rolling mill U1 is a driven roller, a lower horizontal roller and two vertical rollers are all 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.
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: the method comprises a rough rolling stage and a finish rolling stage, wherein a billet raw material is rolled into an H-shaped intermediate blank through a heating and rough rolling stage, and then enters a finish rolling stage for rolling, and the finish rolling stage adopts a plurality of universal rolling mills U and a edging mill E to be matched with each other, so that a wide flange H-shaped steel finished product is rolled. The rolling method can fully utilize the billet raw material, improve the yield of metal, reduce the processing energy consumption, save resources and improve the utilization rate of resources.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. Wherein:
FIG. 1 is a schematic 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 is a pass of a triple-roll mill of a skew rolling pass system.
Fig. 4 is a pass of a two-roll mill of a straight pass system.
Reference numerals illustrate: 1, a horizontal roller is arranged on the roller; 2, standing rolls; 3 lower horizontal roller.
Detailed Description
The invention will be described in detail below with reference to the drawings in connection with embodiments. The examples are provided by way of explanation of the invention and not limitation of the invention. Indeed, 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 of the invention. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield still a further embodiment. Accordingly, it is intended that the present invention encompass such modifications and variations as fall within the scope of the appended claims and their equivalents.
In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. refer to the orientation or positional relationship based on that shown in the drawings, merely for convenience of description of the present invention 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 "coupled," "connected," and "configured" as used herein are to be construed broadly and may be, for example, fixedly connected or detachably connected; can be directly connected or indirectly connected through an intermediate component; either a wired electrical connection, a radio connection or a wireless communication signal connection, the specific meaning of which terms will be understood by those of ordinary skill in the art as the case may be.
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. are used interchangeably to distinguish one component from another and are not intended to represent the location 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 material adopts one of square billet, rectangular billet or H-shaped special-shaped billet.
Rough rolling, namely rough 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 adopts a straight rolling pass system or a diagonal rolling pass system. In the rough rolling stage, the width of the flange is larger than Kong Xingkuan in the prior art. The flange width is to achieve a large reduction in the finishing stage. The pass of the oblique rolling pass system is oblique and the pass of the straight rolling pass system is straight. The oblique rolling pass system is used for a three-roller mill, and the direct rolling pass system is used for a two-roller mill. The pass of a three-high mill of a tandem pass system is shown in FIG. 3, and the pass of a two-high mill of a direct pass system is shown in FIG. 4.
Finish rolling is carried out on intermediate blanks, the finish rolling comprises a plurality of universal rolling mills U and an edging mill E, the universal rolling mill U is provided with an upper horizontal roller 1, a lower horizontal roller 3 and two vertical rollers 2, the horizontal rollers and/or the vertical rollers 2 in the universal rolling mill U are driven to realize large reduction of flanges, and in the embodiment of the invention, the large reduction means that the reduction of the flanges by the two vertical rollers 2 of the universal rolling mill U in the finish rolling stage is larger than 15mm. The driving of the universal mill U consists of a motor, a speed reducer, a connecting shaft and the like. The upper horizontal roller 1, the lower horizontal roller 3 and the two vertical rollers 2 of the universal rolling mill U can be driving rollers or driven rollers, and a wide flange H-shaped steel finished product is rolled by utilizing the cooperation of a plurality of universal rolling mills U and a edging mill E. In the prior art, two vertical rolls 2 of a universal rolling mill U do not adopt large reduction, the reduction of the vertical rolls to flanges is below 10mm, and only H-shaped steel with small-specification flanges can be produced. In the embodiment of the invention, the two vertical rolls 2 of the universal mill U can produce the H-shaped steel with 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 universal rolling mill U+an edge rolling machine E+a universal rolling mill U mode, or a universal rolling mill U+an edge rolling machine E+an universal rolling mill U+an edge rolling machine E+a universal rolling mill U mode is adopted. Which mode is adopted specifically needs to be determined according to the arrangement and the process requirements of the rolling mill. In one embodiment of the invention, only three rolling mills are used in the finishing stage, and only the universal rolling mill U+edger E+universal rolling mill U mode is used.
Further, in the finish rolling step, the upper horizontal roller 1 of the first universal rolling mill U is a driven roller, the lower horizontal roller 3 and the two vertical rollers 2 are driving rollers. The lower horizontal roller 3 of the first universal rolling mill U is used as a driving roller, so that rolled pieces can be conveniently dragged into a hole pattern 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, large reduction is carried out, the growth of flanges is facilitated, the rolling method can fully utilize billet raw materials, the yield of metal is improved, the processing energy consumption is reduced, and the effects of saving resources and improving the utilization rate of the resources are achieved.
Further, in the finish rolling step, the other universal rolling mills U except the first universal rolling mill U are common universal rolling mills, the upper horizontal roller 1 and the lower horizontal roller 3 of the common universal rolling mill are driving rollers, and the two vertical rollers 2 are driven rollers. The common universal rolling mill and edging mill process small pressing and flange to facilitate the forming of the finished product.
Further, in the finish rolling step, the universal rolling mill U ensures that the upper horizontal roller 1 and the lower horizontal roller 3 are simultaneously contacted with the web plate of the H-shaped steel blank and the two vertical rollers 2 are simultaneously contacted with the flange of the middle blank in the rolling process. The universal mill U is generally used only in the finishing stage. In the hole pattern design, 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, so that the simultaneous contact can be ensured.
Further, in the finish rolling step, the two vertical rolls 2 of the first universal rolling mill U press down the flanges under a large pressure during rolling to ensure the growth of the flanges. In the prior art, the vertical roll 2 is a driven roll, and if the vertical roll is pressed under a large pressure, the 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 rolling piece can be prevented from being torn when the rolling piece is pressed under large pressure.
Further, in the finish rolling step, the rolling speed of the horizontal rolls (upper horizontal roll 1 and lower horizontal roll 3) of the universal mill is V Horizontal roller The rolling speed of the vertical roll 2 is V Vertical roller ，V Horizontal roller And V Vertical roller Satisfies the requirements therebetweenWherein V is Horizontal roller Can be slightly larger than V Vertical roller ，V Vertical roller Can be slightly larger than V Horizontal roller The extension matching of the flange and the web of the rolled piece is ensured, and the tearing of the flange and the web of the rolled piece is avoided.
Further, in an embodiment of the present invention, in the rough rolling step, a direct rolling pass system of a two-roll mill is employed; in the finish rolling step, a mode of a universal rolling mill U1 plus an edging mill E plus a universal rolling mill U2 is adopted, as shown in fig. 1, an upper horizontal roller 1 of the universal rolling mill U1 is a driven roller, a lower horizontal roller 3 and two vertical rollers 2 are all driven (driving rollers), 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 driven rollers.
Example 1: the rolling method of HW 300X 10X 15 wide flange H-shaped steel comprises the following steps:
heating, namely heating the billet raw material; the billet raw material adopts rectangular billets.
Rough rolling, namely rough rolling the heated billet raw material to obtain an H-shaped intermediate blank (as shown in figure 2), wherein the specification of the intermediate blank is as follows: h=35mm, b=270 mm, t1=22 mm (t 1 is the thickness of the thinnest part of the web), t2=45 mm (t 2 is the thickness of the middle part of the flange on one side of the H-section steel); the rough rolling stage adopts a two-roller mill and a straight rolling hole type system.
Finish rolling is carried out on the intermediate blank, the finish rolling comprises a universal rolling mill U1, a universal rolling mill U2 and an edging mill E, a mode of the universal rolling mill U1, the edging mill E and the universal rolling mill U2 is adopted, and an upper horizontal roller 1 of the universal rolling mill U1 is a driven roller, a lower horizontal roller 3 and two side vertical rollers 2 are driving rollers. The universal rolling mill U2 is a common universal rolling mill, the horizontal roller of the universal rolling mill U2 is a driving roller, and the vertical rollers 2 at two sides are driven rollers. The pressing rules are shown in Table 1, and the finished product is finally obtained, wherein the specification of the finished product is HW300 multiplied by 10 multiplied by 15, and the finished product meets the specification of wide flange H-shaped steel in GB/T11263 standard.
TABLE 1 pressing protocol/mm
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:
a wide flange H-shaped steel rolling method comprises the following two steps: the method comprises a rough rolling stage and a finish rolling stage, wherein a billet raw material is rolled into an H-shaped intermediate blank through a heating and rough rolling stage, and then enters a finish rolling stage for rolling, and the finish rolling stage adopts a plurality of universal rolling mills U and a edging mill E to be matched with each other, so that a wide flange H-shaped steel finished product is rolled. The rolling method can fully utilize the billet raw material, improve the yield of metal, reduce the processing energy consumption, save resources and improve the utilization rate of resources.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. 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 (8)
1. The wide flange H-shaped steel rolling method is characterized by comprising the following steps of:
heating, namely heating the billet raw material;
rough rolling, namely rough rolling the heated billet raw material to obtain an H-shaped intermediate blank;
finish rolling is carried out on the intermediate blank, the finish rolling comprises a plurality of universal rolling mills U and an edging mill E, the horizontal rollers and/or the vertical rollers in the universal rolling mill U are driven to realize large reduction of flanges, wide flange H-shaped steel finished products are rolled,
the universal rolling mill U comprises an upper horizontal roller, a lower horizontal roller and two vertical rollers;
in the finish rolling step, the upper horizontal roller of the first universal rolling mill U is a driven roller, the lower horizontal roller and the two vertical rollers are driving rollers,
in the finish rolling step, the two vertical rolls of the first universal rolling mill U are used for carrying out large reduction on the flange in the rolling process, wherein the large reduction means that the reduction of the flange by the two vertical rolls of the universal rolling mill U in the finish rolling stage is larger than 15mm so as to ensure the growth of the flange.
2. The wide flange H-section steel rolling method according to claim 1, wherein,
the billet raw material adopts one of square billets, rectangular billets or H-shaped special-shaped billets.
3. The wide flange H-section steel rolling method according to claim 1, wherein,
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 diagonal rolling pass system is adopted.
4. The wide flange H-section steel rolling method according to claim 1, wherein,
in the finish rolling step, a universal rolling mill U+an edge rolling machine E+a universal rolling mill U mode is adopted,
or a universal rolling mill U+a universal rolling mill U+an edging mill E+a universal rolling mill U mode,
or a universal mill U+a edging mill E+a universal mill U mode.
5. The wide flange H-section steel rolling method according to claim 1, wherein,
in the finish rolling step, other 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 the common universal rolling mill are driving rollers, and two vertical rollers are driven rollers.
6. The wide flange H-section steel rolling method according to claim 1, wherein,
in the finish rolling step, the upper horizontal roller and the lower horizontal roller are ensured to be contacted with the web plate of the H-shaped steel blank, and the two vertical rollers are contacted with the flange of the middle blank simultaneously.
7. The wide flange H-section steel rolling method according to claim 1, wherein,
in the finish rolling step, the rolling speed of the horizontal roller of the universal rolling mill is V Horizontal roller The rolling speed of the vertical roll is V Vertical roller ，V Horizontal roller And V Vertical roller Satisfies the requirements therebetweenWherein,
V horizontal roller Greater than V Vertical roller Or V Vertical roller Greater than V Horizontal roller Ensuring the extension match of the flanges and webs of the rolled pieceAnd the rolling piece flange and the web are prevented from being torn.
8. The wide flange H-section steel rolling method according to claim 1, wherein,
in the rough rolling step, a straight rolling hole type system of a two-roller mill is adopted;
in the finish rolling step, the finish rolling consists of a universal rolling mill U1, an edging mill E and a universal rolling mill U2, adopts a mode of the universal rolling mill U1+ the edging mill E + the universal rolling mill U2,
the upper horizontal roller of the universal rolling mill U1 is driven by a driven roller, the lower horizontal roller and two vertical rollers,
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.
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