CN114769309B - High-speed bar cutting production line and process - Google Patents
High-speed bar cutting production line and process Download PDFInfo
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- CN114769309B CN114769309B CN202210624908.4A CN202210624908A CN114769309B CN 114769309 B CN114769309 B CN 114769309B CN 202210624908 A CN202210624908 A CN 202210624908A CN 114769309 B CN114769309 B CN 114769309B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 39
- 238000005520 cutting process Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005096 rolling process Methods 0.000 claims abstract description 113
- 238000001816 cooling Methods 0.000 claims abstract description 69
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 230000011218 segmentation Effects 0.000 claims 1
- 229910000997 High-speed steel Inorganic materials 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011144 upstream manufacturing 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
- B21B1/16—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
- B21B1/18—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
-
- 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
- B21B15/0007—Cutting or shearing the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B43/00—Cooling beds, whether stationary or moving; Means specially associated with cooling beds, e.g. for braking work or for transferring it to or from the bed
-
- 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
- B21B15/0007—Cutting or shearing the product
- B21B2015/0014—Cutting or shearing the product transversely to the rolling direction
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention relates to a production line and a process for cutting high-speed bars, which belong to the technical field of bar rolling and comprise a rough rolling unit, a middle rolling unit, a pre-finishing rolling unit, a finishing rolling unit and a cooling bed which are sequentially arranged along the rolling direction; the rough rolling unit and the middle rolling unit are all 1 set, the pre-finishing mill unit, the finishing mill unit and the cooling bed are all set to be n sets, n is a positive integer greater than or equal to 2, the hot billet is cut and rolled in the middle rolling unit to form n rolled pieces, and the n rolled pieces are respectively sent into the pre-finishing mill unit, the finishing mill unit and the cooling bed which are respectively corresponding to each other to carry out subsequent processing steps. Compared with the conventional double-line high-speed bar production line with double lines converged to 1 cooling bed after finish rolling, the single-line high-speed bar production line can obtain higher annual output, is easier to switch the product specifications, can simultaneously produce a plurality of bars with the same specification, can simultaneously produce a plurality of bars with different specifications, has high flexibility, and can realize high-efficiency and high-output production.
Description
Technical Field
The invention belongs to the technical field of bar rolling, and relates to a high-speed bar cutting production line and process.
Background
Compared with the traditional splitting rolling production line mode, the high-speed bar production line adopts a roll collar rolling mill to roll a finished product to obtain a finished product with higher precision, a single torsion-free low-temperature controlled rolling technology is adopted in a finish rolling area to realize alloy reduction production, a single tooth groove is placed on a cooling bed to be cooled and aligned, higher yield can be obtained, and based on the advantages, the high-speed bar production technology has been rapidly developed in recent years.
High speed bar production lines currently have two main types: one is a single-wire high-speed bar production line, also called a single-wire high-speed bar production line for short, namely, rough rolling, middle rolling, pre-finish rolling and finishing rolling groups are all single rolling, and after finish rolling, the single rolling is sent into a 1-seat cooling bed by a set of high-speed steel feeding system; the other is a double-line high-speed bar production line, namely a double-high-speed bar production line for short, namely rough rolling and medium rolling are single rolling, pre-finish rolling is two-split rolling, the pre-finish rolling is divided into two lines and simultaneously enters two groups of finish rolling groups after the pre-finish rolling, each line is single rolling in each group of finish rolling, the finish rolling is combined, and the finish rolling is sent to a cooling bed by a double-high-speed steel feeding system capable of meeting the two lines and simultaneously feeding the cooling bed. The double-line high-speed bar production line adopts a technology of combining two cutting and a high-speed steel feeding system, and can obtain higher annual output compared with a single-line high-speed bar production line, but because the double lines are converged to 1 cooling bed after finish rolling, bar products with one specification can only be produced simultaneously in two groups of finish rolling groups, the double-line high-speed bar production line is suitable for large-batch production of products, infrequent specification switching and low production flexibility.
Disclosure of Invention
In view of the above, the present invention aims to provide a high-speed bar cutting production line and process, which can realize high-efficiency and high-yield production and have high production flexibility.
In order to achieve the above purpose, the present invention provides the following technical solutions:
in one aspect, the invention provides a high-speed bar cutting production line, which comprises a rough rolling unit, a middle rolling unit, a pre-finishing rolling unit, a finishing rolling unit and a cooling bed which are sequentially arranged along a rolling direction;
the roughing mill set and the intermediate mill set are 1 set, the intermediate mill set 3 is an n-split rolling set, the pre-finishing mill set, the finishing mill set and the cooling bed are all set to be n sets, and n is a positive integer greater than or equal to 2.
In some embodiments of the disclosure, a first flying shear is disposed between the roughing mill set and the middle mill set, and is used for cutting the head of the rolled piece after roughing.
In some embodiments of the present disclosure, a second flying shear is disposed between the intermediate rolling mill group and the pre-finishing mill group, and is used for cutting the end of the rolled piece after intermediate rolling.
In some embodiments of the disclosure, a first water cooling section and a third flying shear are sequentially arranged between the pre-finishing mill group and the finishing mill group, and the pre-finishing-rolled water cooling section can be used for cooling a rolled piece subjected to pre-finishing rolling and is fed into the finishing mill group after cutting the end of the rolled piece through the third flying shear.
In some embodiments of the disclosure, a finish rolling post-water cooling section and a multiple-length flying shear are sequentially arranged between the finishing mill group and the cooling bed, and after the finish rolling rolled piece is further cooled through the finish rolling post-water cooling section, the rolled piece is sheared into multiple-length bars through the multiple-length flying shear and then is sent to the cooling bed for cooling.
In some embodiments of the present disclosure, a collection system for collecting the bars after the cooling bed is provided, the collection system being for bundling the collected bars.
In some embodiments of the present disclosure, a cold shear is provided between the cooling bed and the collection system, the cold shear being used to shear the length-doubled bar into a desired length-fixed bar.
In one aspect, the invention also provides a process for producing the cut high-speed bar, which specifically comprises the following steps:
a. feeding the hot steel billet into the roughing mill set for single rolling, and cutting and rolling in the middle rolling mill set to form n rolled pieces;
b. respectively feeding the rolled pieces into the respective pre-finishing mill group and finishing mill group for finishing rolling;
c. and (5) conveying the rolled piece after finish rolling into a corresponding cooling bed for cooling.
In some embodiments of the present disclosure, the hot steel blank has a cross-sectional area of 100cm 2 ~625 cm 2 Square, round or rectangular billets.
In some embodiments of the present disclosure, in the steps a and b, the rolling speed of the hot steel billet is 0.05 m/s to 60m/s.
The invention has the beneficial effects that:
1. compared with the conventional double-line high-speed bar production line with double lines converged to 1 cooling bed after finish rolling, the single-line high-speed bar production line can obtain higher annual output, is easier to switch the product specifications, can simultaneously produce a plurality of bars with the same specification, can simultaneously produce a plurality of bars with different specifications, has high flexibility, and can realize high-efficiency and high-output production.
2. The invention sets the middle rolling mill group as the splitting rolling mill group, the model of the rolled piece obtained by splitting rolling is larger than that obtained by splitting rolling of the pre-finishing mill group, the invention has larger adjustment space, is convenient for the adjustment of the model of the subsequent rolled piece, and can produce bars of more models by matching with a plurality of sets of pre-finishing mill groups, finishing mill groups and cooling beds, when the bar model is adjusted, the adjustment of the working procedure parameters of the middle rolling mill group and the upstream of the middle rolling mill group is not needed, and the adjustment of the bar model can be realized by adjusting the working procedure parameters of the downstream of the middle rolling mill group, thereby greatly improving the efficiency of adjusting the production model.
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 objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in the following preferred detail with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural view of a high-speed bar cutting line.
Reference numerals: 1-roughing mill group, 2-first flying shears, 3-intermediate mill group, 4-second flying shears, 5-prefinishing mill group, 6-water cooling section after prefinishing, 7-third flying shears, 8-finishing mill group, 9-water cooling section after finishing rolling, 10-multiple-length flying shears, 11-cooling bed, 12-cooling shears and 13-collecting system.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the invention; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated 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 numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present invention, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.
Example 1
Please refer to fig. 1, which is a high-speed bar cutting production line with higher production flexibility, wherein an arrow in front of a roughing mill set is shown as a rolling direction and is also a hot billet running direction, the production line comprises a roughing mill set 1, a first flying shear 2, a middle mill set 3, a second flying shear 4, a pre-finishing mill set 5, a pre-finishing mill post-water-cooling section 6, a third flying shear 7, a finishing mill set 8, a post-finishing mill water-cooling section 9, a multiple-length flying shear 10, a cooling bed 11, a cold shear 12 and a collecting system 13 which are sequentially arranged along the rolling direction, and all the components are connected through a roller way or a guide groove.
The rough rolling unit 1, the first flying shear 2 and the middle rolling unit 3 are one set, the second flying shear 4, the pre-finishing mill unit 5, the pre-finishing mill post-water-cooling section 6, the third flying shear 7, the finishing mill unit 8, the finish-finishing mill post-water-cooling section 9, the multiple flying shear 10, the cooling bed 11, the cold shear 12 and the collecting system 13 are two sets, hot billets enter the middle rolling unit 3 after being rough rolled in the rough rolling unit 1 and pass through the first flying shear 2 to be cut into two rolled pieces, the two rolled pieces are respectively guided into the second flying shear 4 through two guide grooves and are cut into the cut ends, and then respectively enter the corresponding pre-finishing mill unit 5, the pre-finishing mill post-water-cooling section 6, the third flying shear 7, the finishing mill unit 8, the finish-finishing mill post-water-cooling section 9, the multiple flying shear 10, the cooling bed 11, the cold shear 12 and the collecting system 13 to be subjected to subsequent processing.
The roughing mill group 1 comprises 8 rolling mills, the middle rolling mill group 3 comprises 6 rolling mills, the pre-finishing mill group 5 comprises 4 rolling mills, the finishing mill group 8 comprises 8 rolling mills, each rolling mill of the roughing mill group 1, the middle rolling mill group 3 and the pre-finishing mill group 5 is in a type that a motor is independently driven, and the rolling mill of the finishing mill group 8 is in a type that each rolling mill is independently driven by a motor or a type that each two rolling mills are driven by a motor.
The production process of the cut high-speed bar material specifically comprises the following steps:
a. feeding the hot steel billet into the roughing mill set 1 for single rolling, and performing two-segment rolling in the intermediate mill set 3 to form two rolled pieces;
b. respectively feeding the two rolled pieces into two sets of pre-finishing mill groups 5 and finishing mill groups 8 for finish rolling;
c. and feeding the two rolled pieces after finish rolling into two sets of cooling beds 11 for cooling.
Specifically, the hot steel billet adopts a section size of 225cm 2 The square blank is rolled into round rolled pieces with the diameter of about phi 57mm or square rolled pieces with the equivalent sectional area by 8 rolling mills of a roughing mill set 1, the round rolled pieces enter a middle rolling mill set 3 after being cut by a first flying shear 2, the rolled pieces are rolled into 2 round or nearly round rolled pieces with the diameter of about phi 25.5mm by two cutting in the middle rolling mill set consisting of 6 rolling mills, the 2 rolled pieces are respectively guided into a second flying shear 4 by two guide grooves at the same time, the round rolled pieces enter two groups of pre-finishing mill sets 5 for rolling respectively after being cut, the water-cooled section 6 is cooled after being pre-finished, and round steel bars with the diameter of phi 6mm to 20mm are respectively rolled by entering a finishing mill set 8 after being cut by the flying shear 7 after being pre-finishedThe ribbed steel bar with approximate sectional area is cooled by a water cooling section 9 after finish rolling, sheared into double-length bars by a double-length flying shear 10, then sent into a cooling bed 11 for cooling, sheared into required 3 m-18 m fixed-length bars by a cooling shear 12 after cooling by the cooling bed, and formed and bundled by a collecting system 13 to form a bundle-shaped straight bar finished product.
Preferably, the cooling bed 11 is one of a tooth-pulling type cooling bed, a rack stepping type cooling bed, a claw-pulling type cooling bed, a carrying chain cooling bed and a rolling disc cooling bed.
Preferably, when the hot billet is rolled in the roughing mill group 1, the intermediate mill group 3, the pre-finishing mill group 5 and the finishing mill group 8, the rolling temperature is 700-1200 ℃, the elongation coefficient of each rolling pass is 1.05-1.5, and the rolling speed is 0.05 m/s-60 m/s.
Preferably, in the rolling process of the hot billet, the pre-finishing mill group 5, the pre-finishing post-finishing water-cooling section 6, the pre-finishing post-flying shear 7, the finishing mill group 8 and the post-finishing water-cooling section 9 can be selected to be fully used, partially emptied and fully emptied according to different bar specifications and varieties.
Preferably, after the middle rolling mill group 3 is subjected to two-splitting rolling, two sets of pre-finishing mill groups 5, two sets of pre-finishing mill post-water cooling sections 6, two sets of pre-finishing mill post-flying shears 7, two sets of finishing mill groups 8, two sets of post-finishing mill post-water cooling sections 9, two sets of multiple-length flying shears 10, two sets of cooling beds 11, two sets of cooling shears 12 and two sets of collecting systems 13 can simultaneously produce bars with the same specification of phi 6mm phi-20 mm, and can simultaneously produce bars with different specifications of phi 6mm phi-phi 20mm, namely one set can simultaneously produce bars with the specification of phi 6mm or other specifications, and the other set can simultaneously produce bars with the specification of phi 20mm or other specifications, so that the production flexibility is higher.
Example 2
The difference between this embodiment and embodiment 1 is that the middle rolling mill group 3 is a three-split rolling mill group, the second flying shear 4, the pre-finishing mill group 5, the pre-finishing post-finishing water cooling section 6, the third flying shear 7, the finishing mill group 8, the post-finishing water cooling section 9, the multiple-length flying shear 10, the cooling bed 11, the cold shear 12 and the collecting system 13 are all three sets, and the hot billet is subjected to three-split rolling in the middle rolling mill group 3.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.
Claims (9)
1. The utility model provides a segmentation high-speed rod production line, includes roughing mill group (1), well rolling mill group (3), finish mill group (5), finish mill group (8) and cold bed (11) that set gradually along the rolling direction, its characterized in that:
the roughing mill set and the intermediate mill set are 1 set, the intermediate mill set (3) is an n-split rolling set, the pre-finishing mill set, the finishing mill set and the cooling bed are all set to be n sets, and n is a positive integer greater than or equal to 2;
a first flying shear (2) is arranged between the roughing mill set (1) and the middle mill set (3).
2. A split high speed bar production line according to claim 1, wherein: a second flying shear (4) is arranged between the middle rolling mill group (3) and the pre-finishing mill group (5).
3. A split high speed bar production line according to claim 1, wherein: a pre-finish rolling post-water cooling section (6) and a third flying shear (7) are sequentially arranged between the pre-finish rolling unit (5) and the finish rolling unit (8).
4. A split high speed bar production line according to claim 1, wherein: a finish rolling post-water cooling section (9) and a multiple-length flying shear (10) are sequentially arranged between the finish rolling unit (8) and the cooling bed (11).
5. A split high speed bar production line according to claim 1, wherein: also comprises a collecting system (13) for collecting the bars after the cooling bed (11) is arranged.
6. The high-speed bar cutting line according to claim 5, wherein: a cold shear (12) is arranged between the cooling bed (11) and the collecting system (13).
7. A process for producing cut high-speed bars, characterized in that a cut high-speed bar production line according to any one of claims 1-6 is used, comprising the following steps:
a. feeding the hot steel billet into the roughing mill set (1) for single rolling, and cutting and rolling in the middle mill set (3) to form n rolled pieces;
b. respectively feeding the rolled pieces into a respective pre-finishing mill group (5) and a finishing mill group (8) for finish rolling;
c. and (3) conveying the finish-rolled piece into a corresponding cooling bed (11) for cooling.
8. The process for producing cut high-speed bars according to claim 7, wherein: the section area of the hot steel billet is 100cm 2 ~625 cm 2 Square, round or rectangular billets.
9. The process for producing cut high-speed bars according to claim 7, wherein: in the steps a and b, the rolling speed of the hot steel billet is 0.05-m/s-60 m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210624908.4A CN114769309B (en) | 2022-06-02 | 2022-06-02 | High-speed bar cutting production line and process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210624908.4A CN114769309B (en) | 2022-06-02 | 2022-06-02 | High-speed bar cutting production line and process |
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| Publication Number | Publication Date |
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| CN114769309A CN114769309A (en) | 2022-07-22 |
| CN114769309B true CN114769309B (en) | 2024-04-02 |
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| CN217616812U (en) * | 2022-06-02 | 2022-10-21 | 中冶赛迪工程技术股份有限公司 | High-speed bar slitting production line |
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| GB765211A (en) * | 1951-04-03 | 1957-01-09 | Demag Ag | A process and plant for producing wire |
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| CN114769309A (en) | 2022-07-22 |
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