Medium and heavy plate rolling production line based on single-stand rolling mill and rolling method

Abstract

The invention belongs to the technical field of steel plate rolling, and discloses a medium plate rolling production line based on a single-stand rolling mill and a rolling method. The rolling production line sequentially comprises a second machine front manipulator, a second machine front rotating roller way matched with the second machine front manipulator, a first machine front manipulator, a first machine front rotating roller way matched with the first machine front manipulator, a four-roller reversible rolling mill, a first machine rear manipulator and a first machine rear rotating roller way matched with the first machine rear manipulator from front to back according to the rolling process. The second machine rear manipulator is matched with the second machine rear rotating roller way; the four-roller reversible rolling mill sequentially comprises a machine front output roller way, a main body and a machine rear output roller way. According to the invention, rolling and steel transfer of different plate blanks can be carried out simultaneously when an existing single-stand rolling mill is used for rolling a medium plate, so that the overall productivity is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel plate rolling, and in particular to a medium and thick plate rolling production line and a rolling method based on a single-stand rolling mill. Background Art

[0002] Medium and thick plates refer to steel plates with a thickness generally greater than 4.5 mm (or in the range of 4.5 mm to 100 mm). They have important applications in construction, ships, engineering machinery, bridges, containers, welded pipes and other fields.

[0003] The rolling of medium and thick plates can be carried out based on a single-stand rolling mill production line or a double-stand rolling mill production line. However, in actual application, since a single-stand rolling mill production line can simultaneously realize the three process stages of forming rolling, widening rolling and extension rolling in the rolling process based on a set of reversible four-roll rolling mills, it has the advantages of simple equipment deployment, low investment, and small footprint. Therefore, some existing production lines use single-stand rolling mill production lines.

[0004] Specifically, the existing single-stand rolling mill production line is deployed as follows: from front to back, it includes: a front push bed and a front rotating roller table matched with it, a four-roller rolling mill, a rear push bed and a rear rotating roller table matched with it. However, under the above-mentioned existing single-stand rolling mill arrangement, when the slab is widened and rolled, the slab needs to be first transferred through the front rotating roller table or the rear rotating roller table, and then the widening stage rolling is carried out after the transfer is completed. After the widening rolling stage is completed, it is necessary to transfer steel again and then carry out the extension stage rolling. Before and after the widening stage rolling, a second transfer is required. At this time, the steel plate occupies the front or rear rotating roller table when transferring steel, and the mill is in a waiting state. Similarly, when the steel plate is rolled, it occupies the front rotating roller table and the rear rotating roller table. At this time, the next slab cannot enter the rotating roller table area. It is necessary to wait until the steel plate rolling in the mill is completed or the stage rolling is completed, and the mill is idle before the next slab can enter the rotating roller table for transfer production.

[0005] It can be seen from this that the existing single-stand rolling mill arrangement and production mode cannot carry out steel plate rolling and slab steel conversion in the rolling mill at the same time, which affects the production rhythm and production efficiency and restricts the improvement of production capacity. Summary of the invention

[0006] The purpose of the present invention is to provide a medium and thick plate rolling production line and rolling method based on a single-stand rolling mill, so as to improve the technical problem that the existing single-stand rolling mill cannot simultaneously roll and transfer different slabs when rolling medium and thick plates, thereby resulting in the inability to improve the overall production capacity.

[0007] To achieve the above object, the present invention proposes the following technical solutions:

[0008] In the first aspect, the technical scheme provides a medium and thick plate rolling production line based on a single-stand rolling mill, which includes, from front to back according to the rolling process: a second front push bed and a second front rotating roller table matched therewith, a first front push bed and a first front rotating roller table matched therewith, a four-roll reversible rolling mill, a first rear push bed and a first rear rotating roller table matched therewith, a second rear push bed and a second rear rotating roller table matched therewith; wherein, the four-roll reversible rolling mill includes, in sequence: a front output roller table, a main body and a rear output roller table.

[0009] Furthermore, a descaling box is provided in front of the second front push bed and the second front rotating roller table matched therewith; and the second rear push bed and the second rear rotating roller table matched therewith sequentially include: a pre-straightening machine, cooling equipment and a straightening machine according to the rolling process.

[0010] In the second aspect, the technical scheme provides a medium and thick plate rolling method based on a single-stand rolling mill, defining that the second front push bed and the second front rotating roller table matched therewith, the first front push bed and the first front rotating roller table matched therewith constitute the first process area; the four-roller reversible rolling mill constitutes the second process area; the first rear push bed and the first rear rotating roller table matched therewith, the second rear push bed and the second rear rotating roller table matched therewith constitute the third process area;

[0011] The steps include:

[0012] Obtaining the slab width and target width of each piece to be rolled to determine a rolling mode;

[0013] Wherein, when the slab width is not less than the target width, rolling mode A is determined to be adopted; when the slab width is less than the target width, rolling mode B or rolling mode C is determined to be adopted;

[0014] The process stages corresponding to the rolling mode A only include the extension stage; the process stages corresponding to the rolling mode B include: forming stage, widening stage, and extension stage in sequence; the process stages corresponding to the rolling mode C include: widening stage and extension stage in sequence;

[0015] When it is determined that any of the rolled pieces adopts rolling mode A, the rolled piece passes through the first process area, the second process area, and the third process area in sequence and then casts the steel; when it is determined that any of the rolled pieces adopts rolling mode B or rolling mode C, the sub-rolling mode corresponding to the rolled piece is further determined and whether there are other rolled pieces in each process area is obtained to determine the steel transfer position according to the preset steel transfer rule;

[0016] Wherein, the sub-rolling modes corresponding to the rolling mode B and the rolling mode C include sequential rolling and batch rolling;

[0017] in,

[0018] Under rolling mode B, the forward steel-turning rules of the sequential rolling and the batch rolling are: when it is judged that the number of passes in the rolled piece forming stage is an even number, the forward steel-turning is performed at the position of the first machine front push bed and the first machine front rotating roller table matched therewith; when it is judged that the number of passes in the rolled piece forming stage is an odd number, the forward steel-turning is performed at the position of the first machine rear push bed and the first machine rear rotating roller table matched therewith;

[0019] Under rolling mode C, the pre-rolling rules for the sequential rolling and the batch rolling are: when it is determined that the sub-rolling mode corresponding to the rolled piece is sequential rolling, when it is determined that the first process area and the second process area are both in an empty state, it is determined that the rolled piece is pre-rolled at the position of the first front push bed and the first front rotating roller table matched therewith for the widening stage; when it is determined that the first process area is in an empty state and the second process area is not empty, the rolled piece is pre-rolled at the position of the second front push bed and the second front rotating roller table matched therewith for the widening stage ; When it is determined that the first process area is not empty and the second process area is empty, when the rolled piece in the first process area enters the second process area, the rolled piece is operated to be turned at the second front push bed and the second front rotating roller table matched therewith for the steel before the widening stage; When it is determined that both the first process area and the second process area are not empty, when the rolled piece in the first process area enters the second process area, the rolled piece is operated to be turned at the second front push bed and the second front rotating roller table matched therewith for the steel before the widening stage;

[0020] Under rolling mode B and rolling mode C, the post-rolling rule of sequential rolling is: when it is determined that the number of passes corresponding to the widening stage is an odd number, the rolled piece is determined to be at the position of the first machine rear push bed and the first machine rear rotating roller table matched therewith for post-rolling during the widening stage; otherwise, the rolled piece is determined to be at the position of the first machine front push bed and the first machine front rotating roller table matched therewith for post-rolling during the widening stage;

[0021] Under rolling mode B and rolling mode C, the post-steel transfer rule of the batch rolling is as follows: when it is judged that the rolled piece is not the last rolled piece in the batch rolling whose number of passes corresponding to the widening stage is an odd number and which is directly kept warm after the widening stage, the rolled piece is transferred after the widening stage at the position of the second machine rear push bed and the second machine rear rotating roller table matched therewith, and is swung on the machine rear output roller table to keep warm; when it is judged that the rolled piece is the last rolled piece in the batch rolling whose number of passes corresponding to the widening stage is an odd number and which is directly kept warm after the widening stage, the rolled piece is transferred after the widening stage at the position of the first machine rear push bed and the first machine rear rotating roller table matched therewith, and is swung on the machine rear output roller table to keep warm;

[0022] When it is determined that the rolled piece is not the last rolled piece in the batch rolling in which the number of passes corresponding to the widening stage is even and the rolled piece is directly heated after the widening stage, the steel is turned after the widening stage at the first front push bed and the first front rotating roller table coordinated therewith, and after the steel is turned, it is transported to the output roller table behind the rolling mill for swinging and waiting for temperature; when it is determined that the rolled piece is the last rolled piece in the batch rolling in which the number of passes corresponding to the widening stage is even and the rolled piece is directly heated after the widening stage, the steel is turned after the widening stage at the second front push bed and the second front rotating roller table coordinated therewith, and it is swinging and waiting for temperature on the output roller table in front of the machine, and the remaining rolled pieces of the batch waiting for temperature after the machine are transported as a whole to the first process area for heating;

[0023] When it is judged that the number of passes corresponding to the widening stage of the rolled piece is an odd number and the extension stage is directly performed after the widening stage, the steel is turned after the widening stage at the position of the first machine rear push bed and the first machine rear rotating roller table matched therewith, and after the steel is turned, it is continuously rolled to the temperature-waiting thickness, and then it is swung on the machine rear output roller table to wait for temperature; when it is judged that the number of passes corresponding to the widening stage of the rolled piece is an even number and the extension stage is directly performed after the widening stage, the steel is turned after the widening stage at the position of the first machine front push bed and the first machine front rotating roller table matched therewith, and after the steel is turned, it is continuously rolled to the temperature-waiting thickness, and then it is swung on the machine rear output roller table or the machine rear output roller table to wait for temperature;

[0024] Among them, in the rolling mode B and rolling mode C, the process passes in the widening stage are: one forward steel transfer, several widening rollings; the process passes in the extension stage are: one rear steel transfer, several extension rollings, one warming and several extension rollings, or: one warming, one rear steel transfer, several extension rollings; under the rolling mode B, the process passes in the forming stage are: several forming rollings;

[0025] Under rolling mode B or rolling mode C, the rolled piece is rolled in the first process area, the second process area, and the third process area, and is turned twice in the corresponding passes according to the turning rules to complete all rolling processes and then cast steel.

[0026] Further, it is provided that the pre-straightening machine constitutes the fourth process area, the cooling equipment constitutes the fifth process area, and the straightening machine constitutes the sixth process area;

[0027] include:

[0028] Sequentially number the rolled pieces according to the order in which they enter the first process area;

[0029] When it is determined that any rolled piece has left the sixth process area, the rolled piece will no longer be numbered, and the other rolled pieces in each process area will delete their own numbers and inherit the number of the previous rolled piece as a new number.

[0030] Furthermore, the first roller of the descaling box is defined as the coordinate origin, the direction of the rolled piece being transported in the rolling process is defined as the positive direction of the x-axis, and the coordinate area corresponding to each process area is obtained;

[0031] include:

[0032] The front end coordinates and the rear end coordinates of each rolled piece are acquired in real time, and matched with the coordinate areas corresponding to each process area to determine whether the state of each process area is an empty state or a non-empty state.

[0033] Further, including:

[0034] Taking pictures of each process area based on a pre-deployed camera to obtain a number of process image data;

[0035] The internal contour of each process image data is extracted, and when the corresponding contour information is determined to be rolled piece information, a tracking frame is added to it, thereby determining whether the state of each process area is an empty state or a non-empty state.

[0036] Beneficial effects:

[0037] It can be seen from the above technical scheme that the technical scheme of the present invention provides a medium and thick plate rolling production line based on a single-stand rolling mill to improve the technical defect that the existing single-stand rolling mill cannot simultaneously roll and transfer different slabs when rolling medium and thick plates, thereby resulting in the inability to improve the overall production capacity.

[0038] Specifically, the deployment of the rolling production line described in the technical solution is: according to the rolling process, from front to back, it includes: the second front push bed and the second front rotating roller table matched with it, the first front push bed and the first front rotating roller table matched with it, the four-roller reversible rolling mill, the first rear push bed and the first rear rotating roller table matched with it, the second rear push bed and the second rear rotating roller table matched with it; wherein, the four-roller reversible rolling mill includes: the front output roller table, the main body and the rear output roller table. At this time, under the above-mentioned new single-frame medium and thick plate production line layout, when the steel plate is rolled in the rolling mill, the next slab can be transferred in advance; when the slab is transferred in advance, it does not affect the rolling of the steel plate in the rolling mill, and the rolling of the steel plate in the rolling mill and the transfer of the slab can be carried out simultaneously, so as to achieve the purpose of efficient production and reduce energy consumption, solve the problem that the rolling of the medium and thick plate rolling mill and the transfer of the rotating roller cannot be carried out at the same time, and improve production efficiency.

[0039] It should be appreciated that all combinations of the foregoing concepts, as well as additional concepts described in greater detail below, may be considered to be part of the inventive subject matter of the present disclosure, provided such concepts are not mutually inconsistent.

[0040] The foregoing and other aspects, embodiments and features of the present invention can be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as the features and / or beneficial effects of the exemplary embodiments, will be apparent from the following description or learned from the practice of the specific embodiments according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For clarity, not every component is labeled in every figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, in which:

[0042] Figure 1 This is a deployment diagram of a medium and thick plate rolling production line based on a single-stand rolling mill described in this embodiment;

[0043] Figure 2 This is a process partition diagram of a medium and thick plate rolling production line based on a single-stand rolling mill described in this embodiment;

[0044] Figure 3 It is a flow chart of the medium and thick plate rolling method based on a single-stand rolling mill described in this embodiment;

[0045] Figure 4 A flowchart of establishing a tracking queue for rolled products and updating the queue in this embodiment;

[0046] Figure 5 A flow chart for confirming the status of each process area in this embodiment;

[0047] Figure 6 Another flow chart for confirming the status of each process area according to this embodiment. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meaning understood by people with general skills in the field to which the present invention belongs.

[0049] The words "first", "second" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular form of "a", "an" or "the" and other similar words do not indicate a quantitative limitation, but rather indicate the presence of at least one. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before "include" or "comprise" cover the features, wholes, steps, operations, elements and / or components listed after "include" or "comprise", and do not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0050] In view of the rolling characteristics of a single-stand rolling mill, that is, when the slab is rolled on a single-stand rolling mill, forming rolling, widening rolling and extension rolling are completed on one rolling mill. Therefore, it has the advantages of simple equipment deployment and rolling process, and has become the mainstream rolling equipment for medium and thick plate rolling. However, since steel needs to be transferred before and after the widening rolling of the steel plate, based on the current deployment of medium and thick plate rolling production lines based on single-stand rolling mills, rolling of the rolling mill and steel transfer on the rotating roller cannot be carried out at the same time, which affects the production rhythm and production efficiency and restricts the improvement of production capacity. Based on this, the present embodiment aims to provide a medium and thick plate rolling production line and rolling method based on a single-stand rolling mill to solve the above-mentioned technical problems.

[0051] The following is a detailed introduction to the medium and thick plate rolling production line and rolling method based on a single-stand rolling mill described in this embodiment in conjunction with the accompanying drawings.

[0052] Example 1

[0053] Combination Figure 1 As shown, the rolling production line includes: from front to back in accordance with the rolling process: a second front push bed and a second front rotating roller table matched therewith, a first front push bed and a first front rotating roller table matched therewith, a four-roller reversible rolling mill, a first rear push bed and a first rear rotating roller table matched therewith, a second rear push bed and a second rear rotating roller table matched therewith; wherein, the four-roller reversible rolling mill includes in sequence: a front output roller table, a main body and a rear output roller table.

[0054] At this time, under the above-mentioned new single-stand medium and thick plate production line layout, the added second front push bed and the second front rotating roller table matched with it can be used for steel transfer and centering of rolled pieces, and the added second rear push bed and the second rear rotating roller table matched with it can be used for steel transfer and centering of rolled pieces. Thus, when the steel plate in the rolling mill is rolled, the next slab can be transferred in advance. And when the slab is transferred in advance, it does not affect the rolling of the steel plate in the rolling mill, and the rolling of the steel plate in the rolling mill and the transfer of the slab can be carried out simultaneously, so as to achieve the purpose of efficient production and reduce energy consumption, solve the problem that the rolling of the medium and thick plate rolling mill and the transfer of the rotating roller table cannot be carried out at the same time, and improve production efficiency.

[0055] As a specific implementation, the rolling production line also includes the following equipment: a descaling box is provided in front of the second front push bed and the second front rotating roller conveyor matched therewith; the second rear push bed and the second rear rotating roller conveyor matched therewith include: a pre-straightening machine, a cooling device and a straightening machine in sequence according to the rolling process. At this time, after the slab is taken out of the heating furnace, it will be sequentially produced through the above-mentioned equipment in sequence to be rolled into medium and thick plates that meet the preset requirements. The hot straightening machine straightening is completed as a sequential production process

[0056] Example 2

[0057] Based on the rolling production line described above, this embodiment further discloses a medium and thick plate rolling method based on a single-stand rolling mill to further improve the production capacity when rolling based on the rolling production line.

[0058] Combination Figure 2 As shown, the second front push bed and the second front rotating roller table matched with it, the first front push bed and the first front rotating roller table matched with it constitute the first process area; the four-roller reversible rolling machine constitutes the second process area; the first rear push bed and the first rear rotating roller table matched with it, the second rear push bed and the second rear rotating roller table matched with it constitute the third process area.

[0059] At this time, combined with Figure 3 As shown, the method includes:

[0060] Step S102: Obtain the slab width and target width of each workpiece to be rolled to determine the rolling mode.

[0061] In the specific implementation, the rolling mode is divided based on the following rolling requirements: when the slab width is not less than the target width, rolling mode A is determined to be adopted; when the slab width is less than the target width, rolling mode B or rolling mode C is determined to be adopted.

[0062] Specifically, for each rolling mode, the specific process stages are as follows: the process stages corresponding to the rolling mode A only include the extension stage. The process stages corresponding to the rolling mode B include: forming stage, widening stage, and extension stage in sequence. At this time, the slab is transported to the rolling mill for forming rolling and then steel transfer, which is then subjected to widening rolling. After widening, steel transfer is performed, and after steel transfer is completed, extension rolling is performed. The process stages corresponding to the rolling mode C include: widening stage and extension stage in sequence. At this time, the slab is transferred during rolling, and after steel transfer is completed, widening rolling is performed. After widening to the target width, steel transfer is performed, and then extension rolling is performed.

[0063] Step S104: when it is determined that any of the rolled pieces adopts rolling mode A, the rolled piece passes through the first process area, the second process area, and the third process area in sequence and then casts the steel; when it is determined that any of the rolled pieces adopts rolling mode B or rolling mode C, continue to determine the sub-rolling mode corresponding to the rolled piece and obtain whether there are other rolled pieces in each process area to determine the steel transfer position according to the preset steel transfer rules.

[0064] Specifically, the sub-rolling modes corresponding to the rolling mode B and the rolling mode C include sequential rolling and batch rolling. The sequential rolling means that after all the rolling stages of a piece of rolled product are completed, the next piece of rolled product is rolled. The batch rolling means that after multiple pieces of the same batch of rolled products complete one stage of rolling at the same time, they are rolled together at the next stage.

[0065] Specifically, the rolling steel conversion rules are as follows:

[0066] Under rolling mode B, the forward steel-turning rules of the sequential rolling and the batch rolling are: when it is judged that the number of passes in the rolled piece forming stage is an even number, the forward steel-turning is performed at the position of the first machine front push bed and the first machine front rotating roller table matched therewith; when it is judged that the number of passes in the rolled piece forming stage is an odd number, the forward steel-turning is performed at the position of the first machine rear push bed and the first machine rear rotating roller table matched therewith;

[0067] Under rolling mode C, the pre-rolling rules for the sequential rolling and the batch rolling are: when it is determined that the sub-rolling mode corresponding to the rolled piece is sequential rolling, when it is determined that the first process area and the second process area are both in an empty state, it is determined that the rolled piece is pre-rolled at the position of the first front push bed and the first front rotating roller table matched therewith for the widening stage; when it is determined that the first process area is in an empty state and the second process area is not empty, the rolled piece is pre-rolled at the position of the second front push bed and the second front rotating roller table matched therewith for the widening stage ; When it is determined that the first process area is not empty and the second process area is empty, when the rolled piece in the first process area enters the second process area, the rolled piece is operated to be turned at the second front push bed and the second front rotating roller table matched therewith for the steel before the widening stage; When it is determined that both the first process area and the second process area are not empty, when the rolled piece in the first process area enters the second process area, the rolled piece is operated to be turned at the second front push bed and the second front rotating roller table matched therewith for the steel before the widening stage;

[0068] Under rolling mode B and rolling mode C, the post-rolling rule of sequential rolling is: when it is determined that the number of passes corresponding to the widening stage is an odd number, the rolled piece is determined to be at the position of the first machine rear push bed and the first machine rear rotating roller table matched therewith for post-rolling during the widening stage; otherwise, the rolled piece is determined to be at the position of the first machine front push bed and the first machine front rotating roller table matched therewith for post-rolling during the widening stage;

[0069] Under rolling mode B and rolling mode C, the post-steel transfer rule of the batch rolling is as follows: when it is judged that the rolled piece is not the last rolled piece in the batch rolling whose number of passes corresponding to the widening stage is an odd number and which is directly kept warm after the widening stage, the rolled piece is transferred after the widening stage at the position of the second machine rear push bed and the second machine rear rotating roller table matched therewith, and is swung on the machine rear output roller table to keep warm; when it is judged that the rolled piece is the last rolled piece in the batch rolling whose number of passes corresponding to the widening stage is an odd number and which is directly kept warm after the widening stage, the rolled piece is transferred after the widening stage at the position of the first machine rear push bed and the first machine rear rotating roller table matched therewith, and is swung on the machine rear output roller table to keep warm;

[0070] When it is determined that the rolled piece is not the last rolled piece in the batch rolling in which the number of passes corresponding to the widening stage is even and the rolled piece is directly heated after the widening stage, the steel is turned after the widening stage at the first front push bed and the first front rotating roller table coordinated therewith, and after the steel is turned, it is transported to the output roller table behind the rolling mill for swinging and waiting for temperature; when it is determined that the rolled piece is the last rolled piece in the batch rolling in which the number of passes corresponding to the widening stage is even and the rolled piece is directly heated after the widening stage, the steel is turned after the widening stage at the second front push bed and the second front rotating roller table coordinated therewith, and it is swinging and waiting for temperature on the output roller table in front of the machine, and the remaining rolled pieces of the batch waiting for temperature after the machine are transported as a whole to the first process area for heating;

[0071] When it is judged that the number of passes corresponding to the widening stage of the rolled piece is an odd number and the extension stage is directly performed after the widening stage, the steel is turned after the widening stage at the position of the first machine rear push bed and the first machine rear rotating roller table matched therewith, and after the steel is turned, it is continuously rolled to the temperature-waiting thickness, and then it is swung on the machine rear output roller table to wait for temperature; when it is judged that the number of passes corresponding to the widening stage of the rolled piece is an even number and the extension stage is directly performed after the widening stage, the steel is turned after the widening stage at the position of the first machine front push bed and the first machine front rotating roller table matched therewith, and after the steel is turned, it is continuously rolled to the temperature-waiting thickness, and then it is swung on the machine rear output roller table or the machine rear output roller table to wait for temperature;

[0072] Among them, in the rolling mode B and rolling mode C, the process passes in the widening stage are: one forward steel transfer, several widening rollings; the process passes in the extension stage are: one rear steel transfer, several extension rollings, one warming and several extension rollings, or: one warming, one rear steel transfer, several extension rollings; under the rolling mode B, the process passes in the forming stage are: several forming rollings;

[0073] Under rolling mode B or rolling mode C, the rolled piece is rolled in the first process area, the second process area, and the third process area, and is turned twice in the corresponding passes according to the turning rules to complete all rolling processes and then cast steel.

[0074] Step S106, under rolling mode B or rolling mode C, the rolled piece is rolled in the first process area, the second process area, and the third process area, and is turned twice in the corresponding passes according to the turning rules to complete all rolling processes and then cast steel.

[0075] At this time, the rolling modes are divided according to the process stages based on steps S102 to S106, and the optimal steel transfer logic is specified in rolling mode B and rolling mode C that require steel transfer. Specifically, it is specified that steel transfer is performed at the push bed in front of the second machine or the push bed behind the second machine under different circumstances to achieve simultaneous rolling of steel transfer and other rolled products on the production line, thereby improving the overall equipment utilization and avoiding blockage.

[0076] In order to facilitate the tracking of rolled products and confirm the status of each process area, Figure 4 As shown, when it is specified that the pre-straightening machine constitutes the fourth process area, the cooling equipment constitutes the fifth process area, and the straightening machine constitutes the sixth process area, the tracking queue is established and updated through the following steps:

[0077] Step S202, sequentially numbering the rolled pieces in the order in which they enter the first process area.

[0078] Step S204: when it is determined that any rolled piece has left the sixth process area, the rolled piece is no longer numbered, and the numbers of other rolled pieces in each process area are deleted and the number of the previous rolled piece is inherited as the new number.

[0079] For example, the slabs on the production line are queued according to the order in which they are fired. The first slab to be fired is marked as mat1, the second slab to be fired is marked as mat2, and so on. The nth slab to be fired is marked as matn. The queue adopts the first-in-first-out rule. When the tail of the steel plate rolled from the first slab mat1 leaves the sixth process area, mat1 is deleted from the queue, mat2 becomes mat1, mat3 becomes mat2, and so on. Matn becomes matn-1, and the newly fired slab is marked as matn.

[0080] As a further specific implementation method, Figure 5 As shown, when the first roller of the descaling box is defined as the coordinate origin, the direction of the rolled piece transportation in the rolling process is the positive direction of the x-axis, and the coordinate area corresponding to each process area is obtained, the specific status of each process area is also confirmed in the following way:

[0081] Step S302, acquiring the front end coordinates and the rear end coordinates of each rolled piece in real time, and matching them with the coordinate areas corresponding to each process area to determine whether the state of each process area is an empty state or a non-empty state.

[0082] For example, calculate the head positions hmat1, hmat2, ..., hmatn and the tail positions tmat1, tmat2, ..., tmatn of the rolled pieces mat1, mat2, ..., matn, determine the areas where the head and tail of the rolled pieces are located according to the head and tail positions of the rolled pieces, and determine whether the first process area, the second process area, ..., the sixth process area are empty.

[0083] As another specific implementation manner, in combination with Figure 6 as shown, the specific confirmation of the states of each process zone is performed based on the image data processing method:

[0084] Step S402: Shoot each process zone by using pre-deployed cameras to obtain a plurality of process image data.

[0085] Step S404: Extract the internal contours of each process image data, and when the corresponding contour information is determined to be rolled piece information, add a tracking frame thereto, and further determine that the state of each process zone is an empty state or a non-empty state.

[0086] Embodiment 3

[0087] Based on the above rolling method, a specific implementation manner of sequential rolling production in rolling mode C is as follows:

[0088] Steel plate number: B4A29134000;

[0089] Blank size: H×W×L = 320 mm×2290 mm×4683 mm;

[0090] Mother plate size: w×h×l = 20 mm×3599 mm×47675.78 mm;

[0091] Controlled rolling process: Uncontrolled rolling.

[0092] The width W of the slab is 2290 mm, the width size of the mother plate is 3599 mm, W < w, and width spreading rolling is required. The operator does not select shape rolling. The rolling process includes two stages: width spreading rolling and elongation rolling. Therefore, rolling mode C. Before the slab is transported to the rolling mill, steel turning is first performed. After the steel turning is completed, width spreading rolling is carried out. After spreading to the target width, steel turning is performed again, and then elongation rolling is carried out.

[0093] There are three steel plates in front of the steel plate B4A29134000. It is rolled in the second process zone mat3 in the rolling mill area, cooled in the fifth process zone mat2 in the water cooling area, and straightened in the mat1 in the hot straightening area. Therefore, this steel plate is marked as mat4. It is judged that the first process zone is empty and the second process zone is not empty. Therefore, mat4 is centered by steel turning on the rotating roller table in front of the second rolling mill. After the second process zone becomes idle, it is transported to the second process zone for rolling. After the width spreading is completed, the steel is turned on the first rotating roller table in front of the mill, and then the elongation stage rolling is carried out. The specific rolling schedule is shown in Table 1.

[0094] Table 1 Rolling schedule of steel plate B4A29134000

[0095]

[0096] Example 4

[0097] Based on the above rolling method, a specific implementation of batch rolling production in rolling mode C is as follows:

[0098] Steel plate number: B4A25006000;

[0099] Blank size: H×W×L = 320mm×2165mm×3616mm;

[0100] Mother plate size: w×h×l = 30mm×2935mm×28451.62mm;

[0101] Controlled rolling process: controlled rolling.

[0102] The width W of the slab is 2165mm, and the width of the mother plate is 2935mm. Since W < w, width spreading rolling is required. The operator does not select shape rolling. The rolling process includes two stages: width spreading rolling and elongation rolling. Therefore, rolling mode C. Before the slab is transported to the rolling mill, steel turning is carried out first. After the steel turning is completed, width spreading rolling is carried out. After spreading to the target width, steel turning is carried out again, and then elongation rolling is carried out. When rolling to the waiting temperature thickness, waiting temperature is carried out. Three pieces are used for waiting temperature rolling. After the waiting temperature is completed, rolling continues.

[0103] There are four steel plates in front of this steel plate B4A25006000. It is rolled in the second process area mat4 in the rolling mill area, waiting for temperature in the third process area mat3 in the area behind the mill, cooled in the fifth process area mat2 in the water cooling area, and straightened in the mat1 in the hot straightening area. Therefore, this steel plate is marked as mat5. It is judged that the first process area is empty and the second process area is not empty. Therefore, mat5 is centered by steel turning on the second rotating roller table in front of the mill. After the second process area is idle, it is transported to the second process area for rolling. After the width spreading is completed, steel turning is carried out on the first roller table behind the mill, and then elongation stage rolling is carried out. When rolling to the waiting temperature thickness, waiting temperature is carried out. The mat5 steel plate is the last one of the three-piece batch rolling. It is rolled to wait for temperature in front of the mill. Then mat4 and mat3 are transported from behind the mill to in front of the mill to wait for temperature together. After the waiting temperature is completed, mat3, mat4, and mat4 are rolled in sequence. The specific rolling schedule is shown in Table 2.

[0104] Table 2 Rolling schedule of steel plate B4A25006000

[0105]

[0106]

[0107] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.

Claims

1. A medium and thick plate rolling production line based on a single-stand rolling mill, characterized in that: According to the rolling process, it includes from front to back: the second front push bed and the second front rotating roller table matched with it, the first front push bed and the first front rotating roller table matched with it, a four-roller reversible rolling mill, the first rear push bed and the first rear rotating roller table matched with it, the second rear push bed and the second rear rotating roller table matched with it; wherein, the four-roller reversible rolling mill includes in sequence: the front output roller table, the main body and the rear output roller table.

2. The medium and thick plate rolling production line based on a single-stand rolling mill according to claim 1, characterized in that: A descaling box is arranged in front of the second front push bed and the second front rotating roller table matched therewith; and the second rear push bed and the second rear rotating roller table matched therewith sequentially include: a pre-straightening machine, a cooling device and a straightening machine according to the rolling process.

3. A medium and thick plate rolling method based on a single-stand rolling mill, characterized in that: It is defined that the second front push bed and the second front rotating roller table matched therewith, the first front push bed and the first front rotating roller table matched therewith constitute the first process area; the four-roller reversible rolling machine constitutes the second process area; the first rear push bed and the first rear rotating roller table matched therewith, the second rear push bed and the second rear rotating roller table matched therewith constitute the third process area; The steps include: Obtaining the slab width and target width of each piece to be rolled to determine a rolling mode; Wherein, when the slab width is not less than the target width, rolling mode A is determined to be adopted; when the slab width is less than the target width, rolling mode B or rolling mode C is determined to be adopted; The process stages corresponding to the rolling mode A only include the extension stage; the process stages corresponding to the rolling mode B include: forming stage, widening stage, and extension stage in sequence; the process stages corresponding to the rolling mode C include: widening stage and extension stage in sequence; When it is determined that any of the rolled pieces adopts rolling mode A, the rolled piece passes through the first process area, the second process area, and the third process area in sequence and then casts the steel; when it is determined that any of the rolled pieces adopts rolling mode B or rolling mode C, the sub-rolling mode corresponding to the rolled piece is further determined and whether there are other rolled pieces in each process area is obtained to determine the steel transfer position according to the preset steel transfer rule; Wherein, the sub-rolling modes corresponding to the rolling mode B and the rolling mode C include sequential rolling and batch rolling; in, Under rolling mode B, the forward steel-turning rules of the sequential rolling and the batch rolling are: when it is judged that the number of passes in the rolled piece forming stage is an even number, the forward steel-turning is performed at the position of the first machine front push bed and the first machine front rotating roller table matched therewith; when it is judged that the number of passes in the rolled piece forming stage is an odd number, the forward steel-turning is performed at the position of the first machine rear push bed and the first machine rear rotating roller table matched therewith; Under rolling mode C, the pre-rolling rules for the sequential rolling and the batch rolling are: when it is determined that the sub-rolling mode corresponding to the rolled piece is sequential rolling, when it is determined that the first process area and the second process area are both in an empty state, it is determined that the rolled piece is pre-rolled at the position of the first front push bed and the first front rotating roller table matched therewith for the widening stage; when it is determined that the first process area is in an empty state and the second process area is not empty, the rolled piece is pre-rolled at the position of the second front push bed and the second front rotating roller table matched therewith for the widening stage ; When it is determined that the first process area is not empty and the second process area is empty, when the rolled piece in the first process area enters the second process area, the rolled piece is operated to be turned at the second front push bed and the second front rotating roller table matched therewith for the steel before the widening stage; When it is determined that both the first process area and the second process area are not empty, when the rolled piece in the first process area enters the second process area, the rolled piece is operated to be turned at the second front push bed and the second front rotating roller table matched therewith for the steel before the widening stage; Under rolling mode B and rolling mode C, the post-rolling rule of sequential rolling is: when it is determined that the number of passes corresponding to the widening stage is an odd number, the rolled piece is determined to be at the position of the first machine rear push bed and the first machine rear rotating roller table matched therewith for post-rolling during the widening stage; otherwise, the rolled piece is determined to be at the position of the first machine front push bed and the first machine front rotating roller table matched therewith for post-rolling during the widening stage; Under rolling mode B and rolling mode C, the post-steel transfer rule of the batch rolling is as follows: when it is judged that the rolled piece is not the last rolled piece in the batch rolling whose number of passes corresponding to the widening stage is an odd number and which is directly kept warm after the widening stage, the rolled piece is transferred after the widening stage at the position of the second machine rear push bed and the second machine rear rotating roller table matched therewith, and is swung on the machine rear output roller table to keep warm; when it is judged that the rolled piece is the last rolled piece in the batch rolling whose number of passes corresponding to the widening stage is an odd number and which is directly kept warm after the widening stage, the rolled piece is transferred after the widening stage at the position of the first machine rear push bed and the first machine rear rotating roller table matched therewith, and is swung on the machine rear output roller table to keep warm; When it is determined that the rolled piece is not the last rolled piece in the batch rolling in which the number of passes corresponding to the widening stage is even and the rolled piece is directly heated after the widening stage, the steel is turned after the widening stage at the first front push bed and the first front rotating roller table coordinated therewith, and after the steel is turned, it is transported to the output roller table behind the rolling mill for swinging and waiting for temperature; when it is determined that the rolled piece is the last rolled piece in the batch rolling in which the number of passes corresponding to the widening stage is even and the rolled piece is directly heated after the widening stage, the steel is turned after the widening stage at the second front push bed and the second front rotating roller table coordinated therewith, and it is swinging and waiting for temperature on the output roller table in front of the machine, and the remaining rolled pieces of the batch waiting for temperature after the machine are transported as a whole to the first process area for heating; When it is judged that the number of passes corresponding to the widening stage of the rolled piece is an odd number and the extension stage is directly performed after the widening stage, the steel is turned after the widening stage at the position of the first machine rear push bed and the first machine rear rotating roller table matched therewith, and after the steel is turned, it is continuously rolled to the temperature-waiting thickness, and then it is swung on the machine rear output roller table to wait for temperature; when it is judged that the number of passes corresponding to the widening stage of the rolled piece is an even number and the extension stage is directly performed after the widening stage, the steel is turned after the widening stage at the position of the first machine front push bed and the first machine front rotating roller table matched therewith, and after the steel is turned, it is continuously rolled to the temperature-waiting thickness, and then it is swung on the machine rear output roller table or the machine rear output roller table to wait for temperature; Among them, in the rolling mode B and rolling mode C, the process passes in the widening stage are: one forward steel transfer, several widening rollings; the process passes in the extension stage are: one rear steel transfer, several extension rollings, one warming and several extension rollings, or: one warming, one rear steel transfer, several extension rollings; under the rolling mode B, the process passes in the forming stage are: several forming rollings; Under rolling mode B or rolling mode C, the rolled piece is rolled in the first process area, the second process area, and the third process area, and is turned twice in the corresponding passes according to the steel turning rules to complete all rolling processes and then cast steel.

4. The medium and thick plate rolling method based on a single-stand rolling mill according to claim 3, characterized in that: It is stipulated that the pre-straightening machine constitutes the fourth process area, the cooling equipment constitutes the fifth process area, and the straightening machine constitutes the sixth process area; include: Sequentially number the rolled pieces according to the order in which they enter the first process area; When it is determined that any rolled piece has left the sixth process area, the rolled piece will no longer be numbered, and other rolled pieces in each process area will delete their own numbers and inherit the number of the previous rolled piece as a new number.

5. The medium and thick plate rolling method based on a single-stand rolling mill according to claim 3, characterized in that: Define the first roller of the descaling box as the coordinate origin, and the direction of the rolled piece transportation in the rolling process as the positive direction of the x-axis, and obtain the coordinate area corresponding to each process area; include: The front end coordinates and the rear end coordinates of each rolled piece are acquired in real time, and matched with the coordinate areas corresponding to each process area to determine whether the state of each process area is an empty state or a non-empty state.

6. The medium and thick plate rolling method based on a single-stand rolling mill according to claim 3, characterized in that: include: Taking pictures of each process area based on a pre-deployed camera to obtain a number of process image data; The internal contour of each process image data is extracted, and when the corresponding contour information is determined to be rolled piece information, a tracking frame is added to it, thereby determining whether the state of each process area is an empty state or a non-empty state.

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