CN110560485A - Hot-rolled strip steel endless rolling intermediate billet connecting system and method - Google Patents
Hot-rolled strip steel endless rolling intermediate billet connecting system and method Download PDFInfo
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- CN110560485A CN110560485A CN201910832744.2A CN201910832744A CN110560485A CN 110560485 A CN110560485 A CN 110560485A CN 201910832744 A CN201910832744 A CN 201910832744A CN 110560485 A CN110560485 A CN 110560485A
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- 238000005096 rolling process Methods 0.000 title claims abstract description 43
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 22
- 239000010959 steel Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000006835 compression Effects 0.000 claims description 24
- 238000007906 compression Methods 0.000 claims description 24
- 238000010008 shearing Methods 0.000 claims description 24
- 238000002788 crimping Methods 0.000 claims description 20
- 238000005304 joining Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000009467 reduction Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 12
- 238000003825 pressing Methods 0.000 description 9
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0085—Joining ends of material to continuous strip, bar or sheet
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- Engineering & Computer Science (AREA)
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Abstract
The invention belongs to the technical field of steel rolling, and relates to a hot-rolled strip steel headless rolling intermediate billet connecting system and a method. The toothed press roller is adopted for connecting the intermediate blanks, so that the connection of the intermediate blanks with different widths and different thicknesses can be met, the connection efficiency is improved, and the equipment cost is also reduced.
Description
Technical Field
The invention belongs to the technical field of steel rolling, and relates to a hot-rolled strip steel endless rolling intermediate billet connecting system and method.
Background
The endless rolling of the hot-rolled strip steel refers to that the rolled blank is not divided into blocks in the finish rolling stage, strip threading is carried out for one time, continuous finish rolling is carried out, and the rolled strip steel is cut into steel coils with required weight by high-speed flying shears. Compared with conventional hot-rolled single block rolling, endless rolling has the following significant advantages: the unstable part in the rolling process of the strip steel is eliminated, so that the quality is stable, and the yield is improved; the production of ultrathin, wide and thin products can be realized; when rolling thin strip, the production is stable and the productivity is improved; the tension of the strip steel between the frames is kept stable, so that the deviation of the thickness and the flatness of the strip steel is reduced; the threading and tail flicking times are reduced, and the impact and damage to the roller are reduced; the product has more uniform structure performance.
The existing conventional hot continuous rolling production is changed into endless rolling production, and the most key technical problem is the connection problem of the intermediate blank after rough rolling. Because the endless rolling adopts a belt tension rolling mode, and the second flow of the intermediate billet and the second flow of the finish rolling mill are equal, the connection speed and the quality of the intermediate billet in a hot state influence whether the endless rolling can be realized: if the connection speed is too slow and the connection time is too long, the production efficiency is influenced, and obvious temperature drop is generated, so that the subsequent finish rolling is difficult to perform; if the connection strength is not high and the quality is not good, the strip breakage is easy to occur at the connection part, so that the continuous finish rolling can not be carried out; more importantly, as the conventional hot rolling endless rolling is mainly oriented to the reconstruction of the existing hot continuous rolling production line, and the production line space is fixed, the connecting equipment is not suitable to be large and complex, otherwise, the installation position of the equipment is limited, and the investment and production maintenance cost are increased.
The prior art discloses methods for connecting the connecting parts of intermediate blanks by using special moulds, but the methods need to use different moulds when connecting intermediate blanks with different widths or different thicknesses, so that the spare moulds have large storage capacity and low economy; when the specification of connecting the intermediate billet changes, need change the mould, production efficiency reduces.
Disclosure of Invention
in view of the above, the present invention provides a hot rolled strip endless rolling intermediate billet connecting system and method, which are used for solving the problems of large die storage capacity and low production efficiency in the existing intermediate billet die connecting technology.
In order to achieve the purpose, the invention provides the following technical scheme:
A hot-rolled strip steel endless rolling intermediate billet connecting method comprises the following steps: providing a roughing mill for roughing, a shearing machine for shearing the intermediate billet, a crimping machine for connecting the intermediate billets and a finishing mill for finishing; the crimping machine comprises at least one pair of compression rollers, wherein one compression roller is provided with a bulge, and the other compression roller is provided with a recess matched with the bulge; after the intermediate billet is subjected to rough rolling by the rough rolling mill, the intermediate billet passes through the shearing machine, the shearing machine shears two adjacent sections of intermediate billets, the overlapped parts of the two adjacent sections of intermediate billets are pressed and connected by a compression roller with a bulge and a compression roller with a recess, and the two adjacent sections of intermediate billets are connected by the pressure of the bulge and the recess; and (5) connecting the two adjacent sections of intermediate billets, and entering a finishing mill for finish rolling.
Optionally, the invention adopts a mode of adjusting the pressing amount of the pressing roller to control different pressing depths so as to meet the connection of intermediate blanks with different thicknesses.
Optionally, the protrusions are one or more "rectangular" protrusions and the recesses are one or more "rectangular" recesses matching the shape of the protrusions.
Optionally, the thickness of the intermediate blank is 25 mm-40 mm, the minimum height of the rectangular protrusion of the press roller is 30mm, and the minimum depth of the rectangular depression of the press roller is 30 mm.
Optionally, the width of the rectangular protrusion of the press roller of the press-bonding machine is smaller than the width of the rectangular recess of the press roller, and the difference is 5-20 mm.
optionally, the protrusions are one or more "trapezoidal" protrusions and the recesses are one or more "trapezoidal" recesses matching the shape of the protrusions.
Optionally, the protrusions are one or more "V-shaped" protrusions and the recesses are one or more "V-shaped" recesses matching the shape of the protrusions.
optionally, the temperature at which the intermediate blank is joined is 950 ℃ to 1100 ℃.
A connecting system for hot-rolled strip steel headless rolling of an intermediate billet comprises a roughing mill, a shearing machine, a crimping machine and a finishing mill, wherein the shearing machine comprises a cutter for shearing the intermediate billet, the crimping machine comprises at least one pair of compression rollers, one of the compression rollers is provided with a bulge, and the other compression roller is provided with a recess at a position matched with the bulge; and the roughing mill, the shearing machine, the crimping machine and the finishing mill are sequentially arranged according to the movement direction of the intermediate billet.
Optionally, a hot box is provided between the roughing mill and the shear.
optionally, a high-pressure water descaling device is arranged between the shearing machine and the crimping machine.
optionally, a deburring machine is arranged between the crimping machine and the finishing mill.
Optionally, a straightener is provided between the roughing mill and the shear.
optionally, an overlapping device is arranged between the shearing machine and the crimping machine, and is used for overlapping the head and the tail of two adjacent sections of intermediate billets.
The invention has the beneficial effects that:
According to the invention, the connection speed of the two adjacent sections of intermediate blanks is high, and the connection of the two adjacent sections of intermediate blanks can be quickly completed by crimping through a crimping machine; the crimping machine connects the intermediate blank in a rolling mode, does not travel along with the strip steel, and reduces the occupied space of connecting equipment; the structure is simple, the occupied area is small, and the method can be more widely applied to the reconstruction of the established production line with limited space; after the intermediate billet is descaled by high-pressure water, the overlapped intermediate billets are extruded and connected by a crimping machine with the clearance fit of bulges and depressions of upper and lower compression rollers, and the non-oxidized metal in a high-temperature state flows to the tooth gap clearance under the extrusion action, so that the connection reliability is enhanced by the metal flow; the toothed press roller is adopted for connecting the intermediate blanks, and the connection of the intermediate blanks with different widths and different thicknesses is met by adjusting different pressing amounts of the press roller on line, so that the connection efficiency is improved, and the production cost is reduced.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is an enlarged view taken at I in FIG. 1;
FIG. 3 is a schematic view of a cylindrical press roller of the crimper;
FIG. 4 is a schematic view of a crimper connection.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
the same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Referring to fig. 1-2, the reference numbers in the figures refer to the following elements: the device comprises a first intermediate billet 2, a second intermediate billet 1, a roughing mill 3, a hot coil box 4, a straightening machine 5, a shearing machine 6, a high-pressure water descaling device 7, a lapping device 8, a crimping machine 9, a deburring machine 10 and a finishing mill 11.
As shown in fig. 1 and 2, in the present embodiment, a hot rolled strip endless rolling intermediate billet joining system is provided in which a leveler 5, a shear 6, a high-pressure water descaling device 7, a bonding device 8, a press-bonding machine 9, and a deburring machine 10 are provided between a hot box 4 and a finishing mill 11 after a roughing mill 3.
The scheme comprises the following steps:
S1, straightening the head and tail parts of two adjacent sections of intermediate blanks (a first intermediate blank 2 and a second intermediate blank 1) through a straightening machine 5;
S2, shearing the irregular shapes of the head and the tail of the first intermediate billet 2 and the second intermediate billet 1 through a shearing machine 6;
S3, performing high-pressure water descaling on the first intermediate blank 2 and the second intermediate blank 1 which need to be overlapped through the high-pressure water descaling device 7;
S4, overlapping the head and the tail of the first intermediate blank 2 and the second intermediate blank 1 through the overlapping device 8;
S5 connecting the overlapped parts of the first and second intermediate blanks 2, 1 in step S4 by a crimper 9;
s6, removing burrs at the connecting parts of the first intermediate billet 2 and the second intermediate billet 1 in the step S5 through the deburring machine 10, and preventing the burrs from damaging the roller of the finishing mill so as to ensure smooth operation of endless rolling;
S7 finish rolling the joined first intermediate slab 2 and second intermediate slab 1 by the finish rolling mill 11.
The steps can adopt the following specific schemes respectively and bring the following technical effects:
in the step S1, the straightening machine 5 is used to straighten the head and tail portions of the first intermediate billet 2 and the second intermediate billet 1, so that the upper and lower intermediate billets can be tightly attached to each other in the subsequent lapping process, and the iron oxide scale generated by air residue can be reduced;
in step S2, the shearing machine 6 is used to shear the irregular head and tail portions of the first intermediate billet 2 and the second intermediate billet 1, so that the intermediate billets are completely overlapped in the width direction in the subsequent lapping process, and the connecting area can be increased;
in step S3, the high-pressure water descaling device 7 is used to perform high-pressure water descaling on the head and tail joint portions of the first intermediate billet 2 and the second intermediate billet 1, so as to prevent the existence of scale from affecting the connection effect of the intermediate billets, and in the specific operation steps, the high-pressure water descaling pressure is 18 Mpa-22 Mpa;
in step S4, overlapping the head and the tail of the first intermediate blank 2 and the second intermediate blank 1 by using the overlapping device 8, wherein the overlapping time is less than 5S, so as to prevent the generation of iron oxide scales at a high temperature;
In step S5, a crimping machine 9 having a convex and concave cylindrical press roll is used to crimp the overlapping portion of the first intermediate blank 2 and the second intermediate blank 1, the first intermediate blank 2 and the second intermediate blank 1 are forced to be connected by the pressure of the convex and concave portions, the convex and concave portions of the press roll are in clearance fit in the width direction, the non-oxidized metal in a high temperature state flows to the tooth gap clearance under the extrusion effect, and the reliability of connection is enhanced by the mutual flow between the two intermediate blanks; the pair of cylindrical press rollers of the above-mentioned crimper 9 has matching projections and depressions.
When the upper pressing roller protrudes, the pressing amount is defined as the distance between the top of the protrusion and the upper surface of the upper block middle blank when the compression joint is completed; when the lower pressing roller is protruded, the pressing amount is defined as the distance between the top of the protrusion and the lower surface of the lower intermediate blank when the crimping is completed.
In step S6, after the first intermediate slab 2 and the second intermediate slab 1 are connected, the deburring machine is used to remove burrs at the connection portion, so that the burrs can be prevented from damaging the rolls of the finishing mill, and smooth operation of endless rolling is ensured.
example 1
in the present embodiment, a pair of cylindrical press rollers of the crimper 9 has matching "rectangular" projections and "rectangular" depressions.
the thickness of the intermediate blank is 25mm, the width is 900mm, and the temperature of the intermediate blank during connection is 1030 ℃.
The "rectangular" protrusion height of the crimper roller was 32.5mm and the "rectangular" depression depth was 33 mm.
The width of the rectangular protrusion of the press roller is 130mm, and the width of the rectangular depression is 135 mm.
the length of the cylindrical compression roller body of the compression joint machine is 1200mm, and the length of the rectangular protrusion and the length of the recess of the compression roller are 1200 mm.
The pressing amount of the press roller of the press was 32.5mm at the time of joining.
Example 2
In the present embodiment, a pair of cylindrical press rollers of the crimper 9 has matching "rectangular" projections and "rectangular" depressions.
The thickness of the intermediate blank is 28mm, the width is 1200mm, and the temperature of the intermediate blank during connection is 1080 ℃.
The "rectangular" protrusion height of the crimper roller was 50mm and the "rectangular" depression depth was 52 mm.
The "rectangular" projection width of the crimper roller was 180mm and the "rectangular" depression width was 193 mm.
The length of the cylindrical compression roller body of the compression joint machine is 1800mm, and the length of the rectangular protrusion and the length of the recess of the compression roller are 1800 mm.
The press-down amount of the press roller of the press was 38.6mm at the time of connection.
Example 3
This example is different from example 2 in that the intermediate slab had a thickness of 35mm and a width of 1800 mm. The parameters of example 2 were still used, but at the time of joining, the crimper had a roller reduction of 49 mm.
example 4
this embodiment differs from the above-described embodiments in that although the pair of cylindrical press rollers of the crimper also have matching projections and depressions, the projections and depressions are different in shape, the projections being one or more "trapezoidal" projections and the depressions being one or more "trapezoidal" depressions.
Example 5
This embodiment differs from the above-described embodiments in that, although the pair of cylindrical press rollers of the crimper have matched projections and depressions, which are different in shape, the projections are one or more "rectangular" projections and the depressions are one or more "rectangular" depressions.
Example 6
This embodiment differs from the above-described embodiments in that, although the pair of cylindrical press rollers of the crimper have matching projections and depressions, the projections and depressions are different in shape, the projections being one or more "V-shaped" projections and the depressions being one or more "V-shaped" depressions.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (10)
1. A hot-rolled strip steel endless rolling intermediate billet connecting method is characterized by comprising the following steps:
Providing a roughing mill for roughing, a shearing machine for shearing the intermediate billet, a crimping machine for connecting the intermediate billets and a finishing mill for finishing;
the crimping machine comprises at least one pair of compression rollers, wherein one compression roller is provided with a bulge, and the other compression roller is provided with a recess matched with the bulge;
After the intermediate billet is subjected to rough rolling by the rough rolling mill, the intermediate billet passes through the shearing machine, the shearing machine shears two adjacent sections of intermediate billets, the overlapped parts of the two adjacent sections of intermediate billets are pressed and connected by a compression roller with a bulge and a compression roller with a recess, and the two adjacent sections of intermediate billets are connected by the pressure of the bulge and the recess;
And (5) connecting the two adjacent sections of intermediate billets, and entering a finishing mill for finish rolling.
2. the method for joining hot-rolled strip endless rolled intermediate billets as claimed in claim 1, wherein the different rolling depths are controlled by adjusting the rolling reduction of the rolls to meet the joining of the intermediate billets of different thicknesses.
3. The method of joining a hot rolled strip endless rolled intermediate billet as claimed in claim 1, wherein the crimper roller projections are one or more "rectangular" projections and the crimper roller depressions are one or more "rectangular" depressions matching the projection shape.
4. The method of joining endless rolled intermediate billets of hot rolled steel strip as claimed in claim 1, wherein the thickness of the intermediate billet is 25mm to 40mm, the height of the "rectangular" protrusion of the press roll of the press is 30mm at the minimum, and the depth of the "rectangular" depression of the press roll of the press is 30mm at the minimum.
5. The method for joining an intermediate slab endless rolled by hot rolled steel strip as claimed in claim 1, wherein the width of the "rectangular" projection of the press roll of the crimper is smaller than the width of the "rectangular" recess of the press roll by a difference of 5mm to 20 mm.
6. the method for joining a hot-rolled strip endless rolled intermediate slab as claimed in claim 3, wherein said convex shape is a "trapezoid" or a "V-shape", and said concave shape is a "trapezoid" or a "V-shape" matching the convex shape.
7. a connecting system for hot-rolled strip steel headless rolling of an intermediate billet is characterized by comprising a roughing mill, a shearing machine, a crimping machine and a finishing mill, wherein the shearing machine comprises a cutter for shearing the intermediate billet, the crimping machine comprises at least one pair of compression rollers, one compression roller is provided with a bulge, and the other compression roller is provided with a depression matched with the bulge; and the roughing mill, the shearing machine, the crimping machine and the finishing mill are sequentially arranged according to the movement direction of the intermediate billet.
8. The system for joining hot rolled steel strip endless rolled intermediate billets as claimed in claim 7, wherein a hot box is provided between the roughing mill and the shearing machine.
9. The system for joining endless rolled intermediate billets of hot rolled steel strip as claimed in claim 7, wherein a high pressure water descaling device is provided between the shearing machine and the press-connecting machine.
10. The system for joining hot rolled steel strip endless rolled intermediate billets as claimed in claim 7, wherein a deburring machine is provided between the press-bonding machine and the finishing mill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910832744.2A CN110560485B (en) | 2019-09-04 | 2019-09-04 | System and method for connecting endless rolling intermediate billets of hot rolled strip steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910832744.2A CN110560485B (en) | 2019-09-04 | 2019-09-04 | System and method for connecting endless rolling intermediate billets of hot rolled strip steel |
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| Publication Number | Publication Date |
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| CN110560485A true CN110560485A (en) | 2019-12-13 |
| CN110560485B CN110560485B (en) | 2024-02-23 |
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| CN201910832744.2A Active CN110560485B (en) | 2019-09-04 | 2019-09-04 | System and method for connecting endless rolling intermediate billets of hot rolled strip steel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111389921A (en) * | 2020-03-27 | 2020-07-10 | 中冶赛迪技术研究中心有限公司 | Hot rolling endless rolling shearing and pressing connection method and system thereof |
| CN113477710A (en) * | 2021-07-15 | 2021-10-08 | 中冶赛迪工程技术股份有限公司 | Connecting method and device for hot-rolled strip steel endless rolling intermediate billet |
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| CN210754352U (en) * | 2019-09-04 | 2020-06-16 | 中冶赛迪工程技术股份有限公司 | Hot-rolled strip steel endless rolling intermediate billet connecting system |
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| JPH09216007A (en) * | 1996-02-06 | 1997-08-19 | Sumitomo Metal Ind Ltd | Press mechanism of hot steel joining machine |
| US6463652B1 (en) * | 1997-11-26 | 2002-10-15 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Apparatus and methods for manufacturing hot rolled steel sheets |
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| CN111389921A (en) * | 2020-03-27 | 2020-07-10 | 中冶赛迪技术研究中心有限公司 | Hot rolling endless rolling shearing and pressing connection method and system thereof |
| CN111389921B (en) * | 2020-03-27 | 2022-02-01 | 中冶赛迪技术研究中心有限公司 | Hot rolling endless rolling shearing and pressing connection method and system thereof |
| CN113477710A (en) * | 2021-07-15 | 2021-10-08 | 中冶赛迪工程技术股份有限公司 | Connecting method and device for hot-rolled strip steel endless rolling intermediate billet |
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| CN110560485B (en) | 2024-02-23 |
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