CN114042754A - Section rolling system and production method - Google Patents
Section rolling system and production method Download PDFInfo
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- CN114042754A CN114042754A CN202111354704.5A CN202111354704A CN114042754A CN 114042754 A CN114042754 A CN 114042754A CN 202111354704 A CN202111354704 A CN 202111354704A CN 114042754 A CN114042754 A CN 114042754A
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- 238000005096 rolling process Methods 0.000 title claims abstract description 90
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 48
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 150
- 239000010959 steel Substances 0.000 claims abstract description 150
- 238000010008 shearing Methods 0.000 claims abstract description 29
- 238000001816 cooling Methods 0.000 claims description 43
- 238000004806 packaging method and process Methods 0.000 claims description 15
- 238000007689 inspection Methods 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 4
- 239000000443 aerosol Substances 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 239000000047 product Substances 0.000 description 44
- 239000000463 material Substances 0.000 description 16
- 238000004513 sizing Methods 0.000 description 11
- 239000010935 stainless steel Substances 0.000 description 10
- 229910001220 stainless steel Inorganic materials 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 229910000975 Carbon steel Inorganic materials 0.000 description 4
- 239000010962 carbon steel Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- JLQUFIHWVLZVTJ-UHFFFAOYSA-N carbosulfan Chemical compound CCCCN(CCCC)SN(C)C(=O)OC1=CC=CC2=C1OC(C)(C)C2 JLQUFIHWVLZVTJ-UHFFFAOYSA-N 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 238000007885 magnetic separation 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
- 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
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- 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
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- 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
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- Engineering & Computer Science (AREA)
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Abstract
The application relates to a section rolling system and a production method, wherein the section rolling system comprises: a rolling unit and a finishing unit; the rolling unit comprises a rough rolling unit, a first intermediate rolling unit, a second intermediate rolling unit and a finishing rolling unit which are arranged in sequence; the roughing mill group and the first intermediate mill group respectively comprise a shared roll pass, and the second intermediate mill group and the finishing mill group respectively comprise roll passes of different finished products; the finishing unit comprises a straightening and shearing combination device for multi-line online straightening of the profile. The common roll pass is adopted to roll round steel finished products or common intermediate blanks of different types of channel steel or angle steel on the roughing mill group and the first intermediate mill group, and the sections of different types are respectively produced by the second intermediate mill group and the finishing mill group, so that the production of the sections of different specifications and varieties on the same production line is realized.
Description
Technical Field
The application relates to the technical field of ferrous metallurgy hot rolling, in particular to a section rolling system and a production method.
Background
The section rolling is a technological process of hot rolling ingot blank into sections with various cross-sectional shapes by using a porous roller. The section steel has various varieties and complex specifications, and generally adopts a production mode of various varieties and small batch.
The continuous rolling of the section with a complicated section is difficult; the section steel finishing process adopts off-line finishing because of the reasons of equipment level and the like, the production efficiency is low, and the labor is increased; on a production line taking both stainless steel profiles and carbon steel profiles into consideration, the problems that the profiles cannot be shared in a collection mode and the like are limited by the development and progress of the profile technology according to the characteristics of stainless steel and carbon steel.
Disclosure of Invention
The purpose of the application is to provide a section rolling system and a production method, the section rolling system and the production method can realize the full-continuous rolling of raw materials of sections with different sections, and the online multi-line straightening and sizing of the sections, so that the smooth production of the sections with different specifications and varieties on the same production line is realized.
In order to achieve the above object, in a first aspect, the present invention provides a section rolling system comprising: a rolling unit and a finishing unit;
the rolling unit comprises a rough rolling unit, a first intermediate rolling unit, a second intermediate rolling unit and a finishing rolling unit which are arranged in sequence;
the roughing mill group and the first intermediate mill group respectively comprise a shared roll pass, and the second intermediate mill group and the finishing mill group respectively comprise roll passes of different finished products;
the finishing unit comprises a straightening and shearing combination device for multi-line online straightening of the profile.
In an alternative embodiment, the roughing mill group and the first intermediate mill group respectively comprise rolling mills which are arranged in a horizontal and vertical alternating manner, and the second intermediate mill group and the finishing mill group respectively comprise all-flat rolling mills.
In an optional embodiment, the rolling unit is connected with a cooling bed through a roller way, the straightening and shearing combination device comprises a straightener and a cold shearing machine which are arranged in sequence, the straightener is connected to the downstream of the cooling bed, and the cold shearing machine is connected with the straightener.
In an optional embodiment, a comb pinch roll is arranged at an inlet of the straightening machine, an outlet of the straightening machine is provided with a guide groove for an outlet after straightening, and a gap bridge between the cold shears and the straightening machine is arranged between the straightening machine and the cold shears.
In an alternative embodiment, the cooling bed comprises a rack stepping cooling bed, and the cooling bed outlet is provided with an aerosol cooling device.
In an alternative embodiment, the finishing unit further comprises a marshalling gantry, a cold saw and a packaging device arranged downstream of the cold shears, and a cross-gantry is connected between the cold saw and the packaging device.
In an alternative embodiment, an angle steel crossing rack is connected to the marshalling rack, and the angle steel crossing rack is arranged between the marshalling rack and the packaging device and can form a conveying branch line after the angle steel is subjected to cold shearing.
In an optional implementation mode, the packaging device comprises a finished product conveying roller way, a section steel stacking machine and a round steel checking rack are connected to the finished product conveying roller way, the round steel checking rack is arranged on two sides of the section steel stacking machine and is respectively connected with an automatic bundling machine and a collecting rack.
In an alternative embodiment, a cutting head flying shear and a multiple length flying shear are arranged between different units in the rolling unit, and a pinch roll is arranged at the upstream of one middle rolling unit.
In a second aspect, the present invention provides a profile production method using the profile rolling system according to any one of the preceding embodiments, comprising the steps of:
the heated billet passes through a roughing mill set and a medium mill set in sequence to obtain a round steel finished product or a profile steel intermediate billet;
the round steel finished product is directly conveyed to a cooling bed through a roller way for cooling, and the section steel intermediate billet is conveyed to the cooling bed through the roller way for cooling after passing through a secondary intermediate rolling mill set and a finishing mill set in sequence to obtain a section steel finished product;
the cooled round steel finished product is produced after marshalling, cold sawing, stacking, checking and bundling in sequence;
and according to the size of the angle steel, the cooled channel steel finished product and part of the model angle steel finished product are sequentially subjected to online straightening, marshalling, cold sawing, stacking, checking and bundling, or the cooled part of the model angle steel finished product is sequentially subjected to online straightening, cold shearing, stacking, checking and bundling, so that the production is completed.
The section rolling system can roll round steel finished products or common intermediate blanks of different types of channel steel or angle steel on the roughing mill set and the first intermediate mill set through the common roll pass, and respectively produce sections of different types through the second intermediate mill set and the finishing mill set, so that the production of sections of different specifications and varieties on the same production line is realized.
Through the straightening and shearing combined device, the sectional material with small section size can be straightened and sized on a plurality of lines on line, different production processes can be carried out according to specific finished product size, sectional materials with different forms and sectional materials with different models can be produced in a combined manner, and the production range of the sectional material is widened.
The section bar production method can be used for rolling production in a targeted manner according to round steel, channel steel or angle steel with different sizes and models, and can be used for subsequent processing according to different sizes and models of the angle steel, so that rolling of different types and different models of section bars on the same production line is met.
Additional features and advantages of the present application will be described in detail in the detailed description which follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a profile rolling system provided in an embodiment of the present application;
fig. 2 is a schematic elevation structure view of a corrective shearing combination device provided in an embodiment of the present application.
Icon:
10-a rolling unit; 11-roughing train; 12-a medium mill group; 13-a second intermediate mill group; 14-finishing train;
20-a finishing unit; 21-a corrective shear combination; 22-a straightening machine; 221-comb pinch rolls; 222-outlet channel after straightening; 23-a cold shearing machine; 24-gap bridge between the cold shear and the straightener; 25-marshalling stand; 26-cold sawing; 27-a cross-over gantry; 28-angle steel crossing rack;
30-cooling bed;
40-a packaging device; 41-finished product conveying roller way; 42-section steel stacker crane; 43-round steel inspection bench; 44-a baler; 45-collection stage.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Referring to fig. 1-2, the present invention provides a profile rolling system comprising: a rolling unit 10 and a finishing unit 20; the rolling unit 10 comprises a rough rolling unit 11, a first intermediate rolling unit 12, a second intermediate rolling unit 13 and a finishing rolling unit 14 which are arranged in sequence; the roughing mill group 11 and the first intermediate mill group 12 respectively comprise a common roll pass, and the second intermediate mill group 13 and the finishing mill group 14 respectively comprise roll passes of different finished products; the finishing unit 20 comprises a straightening and shearing combination 21 for multi-line online straightening of the profile.
The section rolling system is mainly used for rolling production of sections in different forms, and the types of the sections can comprise medium and small-sized sections such as hot-rolled equal-side angle steel, hot-rolled unequal-side angle steel, hot-rolled channel steel, hot-rolled hexagonal steel, hot-rolled round steel and the like.
The common roll pass respectively arranged on the roughing mill group 11 and the intermediate mill group 12 can produce finished round steel products or intermediate billets of section steels such as channel steel and angle steel, thereby realizing the respective output of the finished round steel products and the intermediate billets of other section steels.
Through the different finished roll pass that second middle rolling mill group 13 and finishing mill group 14 respectively included, can realize the rolling production of different types and model channel-section steel or angle steel, guarantee the special production line of various different shaped steels to can realize the combination formula production of different section bars.
The straightening and shearing combination device 21 in the finishing unit 20 can be used for performing multi-line online straightening on channel steel and profile steel, and compared with the existing offline finishing, the finishing working condition of the profile steel is effectively improved, and the production efficiency is greatly improved.
Based on the shapes of the finished round steel and other intermediate billets of the section steel, the roughing mill set 11 and the intermediate mill set 12 in the embodiment respectively comprise short stress line mills which are arranged in a horizontal and vertical alternating manner, and qualified finished round steel and the intermediate billets in regular shapes can be produced.
The second intermediate rolling mill group 13 and the finishing rolling mill group 14 are mainly designed into finished hole patterns according to product specifications and are used for processing channel steel or angle steel products with different shapes and specifications, so that the rolling mills in the second intermediate rolling mill group 13 and the finishing rolling mill group 14 are in a full flat roll arrangement mode, rolling production of different steel products can be facilitated through different arrangement modes of the rolling mills in the two intermediate rolling mill groups, and a foundation is provided for processing subsequent finished products.
The number of mill stands is determined according to the specifications of the final product and the raw material, in this embodiment, the roughing mill group 11, the first intermediate mill group 12 and the second intermediate mill group 13 respectively include six mills, and the finishing mill group 14 includes four mills, and the total number of the mills is 22. The roll pass of the first twelve-frame rolling mill adopts a common pass, and the last ten-frame rolling mill designs a finished pass according to the product specification.
The downstream of the rolling unit 10 is connected with a cooling bed 30 through a roller way, all rolled finished products are cooled through the cooling bed 30, and the cooling bed 30 in the embodiment specifically adopts a rack stepping type cooling bed 30, so that the common cooling of various types of section steel can be met. Since a larger pitch is required for cooling the steel section, the cooling efficiency and pitch of the cooling bed 30 are considered sufficiently when designing the cooling bed 30. An outlet of the cooling bed 30 is provided with an aerosol cooling device for cooling the rolled pieces in groups so as to meet the requirement of the straightening machine 22 on the temperature of the rolled pieces.
The straightening and shearing combination device 21 is arranged at the downstream of the cooling bed 30 and specifically comprises a straightening machine 22 and a cooling shearing machine 23 which are sequentially arranged, the straightening machine 22 in the embodiment is an online multi-wire straightening machine 22, the online multi-wire straightening machine 22 is connected to the cooling bed 30 and can simultaneously carry out online straightening on a plurality of cooled rolled steels, and the cooling shearing machine 23 is arranged at the outlet of the straightening machine 22 and directly carries out fixed-length shearing on the small-sized section steel.
The inlet of the straightener 22 is provided with a comb pinch roll 221, the outlet of the straightener 22 is provided with a straightened outlet guide groove 222, a gap bridge 24 between the cold shears and the straightener is arranged between the straightener 22 and the cold shears 23, the smooth biting of the section steel on the straightener 22 can be ensured by arranging the comb pinch roll 221 in front of the straightener 22, and the straightener 22 and the cold shears 23 can be smoothly connected by combining the straightened outlet guide groove 222 and the gap bridge 24 between the cold shears and the straightener.
The cold shears 23 in the embodiment is cold fixed shears, and edge straightening and straight edge sizing shearing is mainly performed on the small-specification section steel for 3# -7# angle steel, so that the production efficiency of the small-specification section steel is effectively improved. The large-sized section steel is straightened by the multi-wire straightener 22 without cold shearing and sizing. The cut-to-length shearing of finished round steel, finished channel steel and profiles larger than 7# angle steel is mainly carried out by a downstream cold saw 26.
After rolling, cooling and optionally straightening or simultaneously straightening and shearing, the section steel finished product enters downstream equipment of the finishing unit 20 of the invention and mainly carries out processes of marshalling, cold sawing to length, checking, stacking, bundling and packaging and the like.
The downstream equipment of the precision unit specifically comprises a marshalling platform 25, a cold saw 26 and a packaging device 40 which are arranged at the downstream of the cold shears 23, wherein a cross-platform 27 is connected between the cold saw 26 and the packaging device 40. The cold saw 26 can be used for sizing round steel, channel steel and large-size section steel, and the end face quality of the sized section steel is guaranteed. The straightening, the marshalling and the sizing cold shears of the section steel are arranged on the same conveying roller way, and the cold saw sizing mainly aims at the sizing sawing of the large-size section steel. The section steel after passing through the cold saw 26 is conveyed to another finished product conveying roller way 41 by the cross-over rack 27, and subsequent processes such as inspection, stacking, bundling and packaging are performed. Two sets of over-spanning racks 27 are specifically arranged in the embodiment and are used for performing the next procedure of over-spanning round steel, channel steel and large-size profile steel.
For the small-specification section steel subjected to cold shearing, cold sawing sizing treatment is not required, the links such as inspection, stacking and packaging are directly entered, an angle steel cross-spanning rack 28 is connected to the upper stream of the grouping rack 25 on the grouping rack 25, the angle steel cross-spanning rack 28 is a small-specification angle steel cross-spanning rack 28, and the rack is a rack which is formed by multi-line straightening and small-specification angle steel subjected to cold shearing sizing. The angle steel crossing rack 28 is arranged between the marshalling rack 25 and the packaging device 40, and is used for directly crossing small-specification angle steel on the straightened conveying roller way onto a finished product conveying roller way 41 for checking and packaging, so that a conveying branch line of the small-specification angle steel after cold shearing can be formed. Through directly crossing the form of sending into low reaches process with small dimension angle steel, realized carrying nearby, reduced the transport distance, effectively improved production efficiency.
The marshalling platform 25 is used to marshal bars, channels, and straightened large size angles as required for sawing by the cold saw 26. When the length of the marshalling sizing material is more than 90m, the small-size angle steel can be merged into the marshalling rack 25 through the spanning rack 28, the two racks are connected by a long shaft, and the clutching operation can be performed as required. In the limited field, the layout is beneficial to saving the length of the production line.
Specifically, the marshalling platform 25 can marshal round steel and large-sized section steel passing through the multi-wire straightener 22, and in order to ensure the end face quality of the fixed-length section steel, the round steel and the large-sized section steel need to be marshaled by the marshalling platform 25 and then sent to the cold saw 26 for sawing and fixing. The small angle steel crossing-over rack 28 can be connected to the body of the grouping rack 25 according to the length of the section steel actually produced, and when the length of the long rolled piece is larger than 90m, the small angle steel crossing-over rack 28 is connected to the body of the grouping rack 25, and can be grouped for 108m long rolled pieces.
The packaging device 40 comprises a finished product conveying roller way 41, a section steel stacker crane 42 and a round steel inspection rack 43 are connected to the finished product conveying roller way 41, the round steel inspection rack 43 is arranged on two sides of the section steel stacker crane 42, and is respectively connected with an automatic bundling machine 44 and a collection rack 45.
The section steel stacker crane 42 in the embodiment comprises a front stacking conveying roller way, a conveying chain, a grouping mechanism, a material blocking mechanism, stacking equipment with a magnetic head, a stacking lifting table, a rear stacking roller way and the like, and is mainly used for automatically stacking carbon steel section steel, wherein the section steel comprises angle steel and channel steel. Through the form of automatic pile up neatly, alleviate intensity of labour, promote the automation level of production line. When stainless steel is produced, the finished stainless steel product is directly conveyed to the round steel inspection rack 43 through the finished product conveying roller way 41, and targeted production is achieved.
The round steel inspection rack 43 in this embodiment includes four racks in total, and is used for inspecting quality of round steel and stainless steel section steel; the automatic bundling machine 44 is provided with two groups of six devices for packing round steel and section steel; the collection stands 45 are provided with two sets in total, and are used for collecting the packed rolled stock to be used in a warehouse. Through the form that sets up round steel inspection rack 43, automatic bundling machine 44 and collection rack 45 branch cover to be located the both sides of shaped steel hacking machine 42 respectively, can realize examining the packing simultaneously, greatly improved the production efficiency of section bar, and two sets of equipment can constitute each other for reserve relation, ensure production system's reliable operation.
It should be noted that, a cutting flying shear and a double-length flying shear are arranged between the rolling mill units, namely between the rolling mill units of different adjacent forms, the cutting flying shear mainly cuts the ends of the steel rolling ends which are easy to warp and raise the tail, and the straightness of the whole section is ensured. When the round steel finished product is used as a pipe blank material, the multi-length flying shear can also be used as the fixed-length shear of the round steel. Pinch rolls may also be provided upstream of a central mill train 12 to assist in better gripping of the intermediate product.
By the sectional material rolling system, the small stainless steel sectional materials can be rolled fully continuously by adopting the raw materials of the long-ruler blank with the large section, the sectional materials are straightened and sized in a multi-line mode on line, different types of the sectional materials adopt different process routes, and the sectional materials with different specifications and types can be produced smoothly on the same production line. And the stainless steel and the carbon steel can share the same collecting equipment, and the rolling production of different types and different types of section bars is considered.
The invention also provides a section bar production method adopting the section bar rolling system, which comprises the following steps:
the heated billet passes through the roughing mill group 11 and the intermediate mill group 12 in sequence to obtain a round steel finished product or a profile steel intermediate billet, and when different types of profiles are produced, the rolled profiles output by the intermediate mill group 12 are output in a targeted manner.
When the round steel finished product is produced, the round steel finished product output by the middle rolling mill group 12 is directly conveyed to the cooling bed 30 through the roller way for cooling, the round steel finished product is straightened on line through the straightener 22 after being cooled, and conveyed to the downstream marshalling and the cold saw 26 for sizing, and then the rolling production of the round steel is completed after stacking, checking and bundling.
When channel steel or angle steel is produced, the intermediate section steel blank output by the first intermediate rolling mill group 12 passes through the second intermediate rolling mill group 13 and the finishing mill group 14 in sequence to obtain a finished section steel product, and then the finished section steel product is conveyed to the cooling bed 30 through a roller way for cooling.
And (3) cooling the produced channel steel finished products and angle steel finished products, and sequentially carrying out online straightening, marshalling, cold sawing 26, stacking, checking and bundling on the cooled channel steel finished products and the cooled angle steel finished products with the size larger than 7# according to the size of the angle steel to finish rolling production.
And (4) sequentially carrying out online straightening, cold shearing, stacking, checking and bundling on the cooled finished angle steel products between 3# and 7# to finish rolling production.
When the rolled stainless steel finished products are produced, the production is carried out according to the above procedures, and the difference is that the rolled stainless steel finished products are not automatically stacked, but are manually stacked instead of automatically stacking the stainless steel sections on the basis of the section steel stacker 42 with magnetic separation.
By the sectional material production method, the continuous production of sectional materials in different forms and different models on the same production line can be realized, the production range of rolled sectional materials is widened, and the limitation of the existing sectional material production is effectively broken through.
It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A profile rolling system, comprising: a rolling unit and a finishing unit;
the rolling unit comprises a rough rolling unit, a first intermediate rolling unit, a second intermediate rolling unit and a finishing rolling unit which are arranged in sequence;
the roughing mill group and the first intermediate mill group respectively comprise a shared roll pass, and the second intermediate mill group and the finishing mill group respectively comprise roll passes of different finished products;
the finishing unit comprises a straightening and shearing combination device for multi-line online straightening of the profile.
2. The profile rolling system according to claim 1, wherein the roughing mill train and the first intermediate mill train each comprise a stand-and-stand alternating mill, and the second intermediate mill train and the finishing mill train each comprise a full flat mill.
3. The profile rolling system according to claim 1, wherein the rolling unit is connected with a cooling bed through a roller way, the straightening and shearing combination device comprises a straightener and a cold shearing machine which are arranged in sequence, the straightener is connected with the downstream of the cooling bed, and the cold shearing machine is connected with the straightener.
4. The section rolling system according to claim 3, wherein a comb pinch roll is arranged at an inlet of the straightener, a straightened outlet guide groove is arranged at an outlet of the straightener, and a gap bridge between the cold shears and the straightener is arranged between the straightener and the cold shears.
5. The profile rolling system of claim 3, wherein the cooling bed comprises a rack step cooling bed, the cooling bed outlet being provided with an aerosol cooling device.
6. The profile rolling system according to claim 3, wherein the finishing unit further comprises a marshalling skid, a cold saw and a packing device arranged downstream of the cold shears, a cross-over skid being connected between the cold saw and the packing device.
7. The section rolling system according to claim 6, wherein an angle steel spanning rack is connected to the marshalling rack, is arranged between the marshalling rack and the packaging device, and can form a cold-sheared angle steel conveying branch line.
8. The section rolling system according to claim 6, wherein the packaging device comprises a finished product conveying roller way, a section steel stacker crane and a round steel inspection rack are connected to the finished product conveying roller way, the round steel inspection rack is arranged on two sides of the section steel stacker crane, and is respectively connected with a bundling machine and a collecting rack.
9. A section rolling system according to any of claims 1 to 8, wherein cutting head flying shears and multiple length flying shears are arranged between different units in the rolling unit, and pinch rolls are arranged upstream of the one intermediate rolling unit.
10. A profile production method using the profile rolling system according to any one of claims 1 to 9, comprising the steps of:
the heated billet passes through a roughing mill set and a medium mill set in sequence to obtain a round steel finished product or a profile steel intermediate billet;
the round steel finished product is directly conveyed to a cooling bed through a roller way for cooling, and the section steel intermediate billet is conveyed to the cooling bed through the roller way for cooling after passing through a secondary intermediate rolling mill set and a finishing mill set in sequence to obtain a section steel finished product;
the cooled round steel finished product is produced after marshalling, cold sawing, stacking, checking and bundling in sequence;
and according to the size of the angle steel, the cooled channel steel finished product and part of the model angle steel finished product are sequentially subjected to online straightening, marshalling, cold sawing, stacking, checking and bundling, or the cooled part of the model angle steel finished product is sequentially subjected to online straightening, cold shearing, stacking, checking and bundling, so that the production is completed.
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| CN202111354704.5A CN114042754A (en) | 2021-11-16 | 2021-11-16 | Section rolling system and production method |
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| CN202111354704.5A CN114042754A (en) | 2021-11-16 | 2021-11-16 | Section rolling system and production method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114951812A (en) * | 2022-07-07 | 2022-08-30 | 山东莱钢永锋钢铁有限公司 | Bar flying shear speed acquisition switching system |
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| EP0818250A2 (en) * | 1996-07-13 | 1998-01-14 | Sms Schloemann-Siemag Aktiengesellschaft | Method for rolling finished sections from preliminary sections |
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| CN114951812B (en) * | 2022-07-07 | 2024-03-12 | 山东莱钢永锋钢铁有限公司 | Bar flying shear speed acquisition switching system |
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