A plate rolling production line based on a single stand rolling mill and a rolling method

Abstract

The application belongs to the technical field of steel plate rolling, and discloses a medium plate rolling production line and a rolling method based on a single stand rolling mill. The rolling production line comprises, in sequence from front to back according to a rolling process, a second mill front push bed and a second mill front rotary roller way matched with the second mill front push bed, a first mill front push bed and a first mill front rotary roller way matched with the first mill front push bed, a four-roller reversible rolling mill, a first mill rear push bed and a first mill rear rotary roller way matched with the first mill rear push bed, and a second mill rear push bed and a second mill rear rotary roller way matched with the second mill rear push bed. The four-roller reversible rolling mill comprises, in sequence, a mill front output roller way, a main body and a mill rear output roller way. According to the application, the rolling of different slabs and the transfer of slabs can be simultaneously performed when the medium plate is rolled by the existing single stand rolling mill, so that the overall production capacity is improved.

Description

TECHNICAL FIELD

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

[0002] Medium plate refers to a steel plate with a thickness generally greater than 4.5 mm, or in the range of 4.5 mm to 100 mm, which has important applications in the fields of construction, ships, engineering machinery, bridges, containers, welded pipes, etc.

[0003] The rolling of medium plate can be based on a single stand rolling mill production line or a double stand rolling mill production line. However, in actual application, since the single stand rolling mill production line can realize the three process stages of forming rolling, spreading rolling and elongation rolling in the rolling process based on a set of reversible four-roll rolling mill, it has advantages such as simple equipment deployment, less investment and small floor area, etc., so some existing production lines adopt the single stand rolling mill production line.

[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 bed cooperating therewith, a four-roll rolling mill, a rear push bed and a rear rotating roller bed cooperating therewith. However, under the above existing single stand rolling mill arrangement form, when the slab is spread, the slab needs to be first turned by the front rotating roller bed or the rear rotating roller bed, and after the turning is completed, the spreading stage rolling is carried out, and after the spreading rolling stage is completed, the slab needs to be turned again for the elongation stage rolling. Before and after the spreading stage rolling, the slab needs to be turned twice, at which time the slab occupies the front or rear rotating roller bed when being turned, and the rolling mill is in a waiting state. Similarly, when the slab is rolled, the front rotating roller bed and the rear rotating roller bed are occupied, at which time the next slab cannot enter the rotating roller area and needs to wait until the rolling mill is idle after the slab in the rolling mill is rolled or the stage rolling is completed.

[0005] As can be seen, under the existing single stand rolling mill arrangement and production mode, the slab rolling in the rolling mill and the slab turning cannot be carried out at the same time, thereby affecting the production rhythm and production efficiency and restricting the capacity improvement. SUMMARY

[0006] The present application aims to provide a medium plate rolling production line and rolling method based on a single stand rolling mill to improve the technical problem that the existing single stand rolling mill cannot carry out the rolling and turning of different slabs at the same time when rolling medium plate, thereby leading to the inability to improve the overall capacity.

[0007] To achieve the above-mentioned purpose, the present application proposes the following technical solutions:

[0008] In a first aspect, the technical scheme provides a plate rolling production line based on a single stand rolling mill, which sequentially comprises, from front to back according to a rolling process, a second mill front pusher bed and a second mill front rotary roller way matched with the second mill front pusher bed, a first mill front pusher bed and a first mill front rotary roller way matched with the first mill front pusher bed, a four-roller reversible rolling mill, a first mill rear pusher bed and a first mill rear rotary roller way matched with the first mill rear pusher bed, and a second mill rear pusher bed and a second mill rear rotary roller way matched with the second mill rear pusher bed; wherein the four-roller reversible rolling mill sequentially comprises a mill front output roller way, a main body, and a mill rear output roller way.

[0009] Further, the second mill front pusher bed and the second mill front rotary roller way matched with the second mill front pusher bed are provided with a descaling box in front; the second mill rear pusher bed and the second mill rear rotary roller way matched with the second mill rear pusher bed sequentially comprise, according to the rolling process, a pre-straightening machine, a cooling device, and a straightening machine.

[0010] In a second aspect, the technical scheme provides a plate rolling method based on a single stand rolling mill, which defines the second mill front pusher bed and the second mill front rotary roller way matched with the second mill front pusher bed, the first mill front pusher bed and the first mill front rotary roller way matched with the first mill front pusher bed as a first process area; the four-roller reversible rolling mill as a second process area; and the first mill rear pusher bed and the first mill rear rotary roller way matched with the first mill rear pusher bed, and the second mill rear pusher bed and the second mill rear rotary roller way matched with the second mill rear pusher bed as a third process area.

[0011] The method comprises the following steps:

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

[0013] When the slab width is not less than the target width, it is determined that the rolling mode A is adopted; when the slab width is less than the target width, it is determined that the rolling mode B or the rolling mode C is adopted.

[0014] The process stage corresponding to the rolling mode A only comprises an elongation stage; the process stage corresponding to the rolling mode B sequentially comprises a forming stage, a spreading stage, and an elongation stage; and the process stage corresponding to the rolling mode C sequentially comprises a spreading stage and an elongation stage.

[0015] When any of the rolling pieces adopts the rolling mode A, the rolling piece is thrown after sequentially passing through the first process area, the second process area, and the third process area; when any of the rolling pieces adopts the rolling mode B or the rolling mode C, a corresponding sub-rolling mode of the rolling piece is continuously determined, and it is determined whether there is another rolling piece in each process area to determine a steel transfer position according to a preset steel transfer rule.

[0016] The sub-rolling mode corresponding to the rolling mode B and the rolling mode C comprises sequential rolling and batch rolling.

[0017] The sub-rolling mode corresponding to the rolling mode B and the rolling mode C comprises sequential rolling and batch rolling.

[0018] Under the rolling mode B, the front transfer rules of the sequential rolling and the batch rolling are both: judging the pass number of the forming stage of the rolled piece as even, the front transfer of the rolled piece is performed at the position of the first mill front pusher and the first mill front rotating roller bed matched therewith; judging the pass number of the forming stage of the rolled piece as odd, the front transfer of the rolled piece is performed at the position of the first mill rear pusher and the first mill rear rotating roller bed matched therewith;

[0019] Under the rolling mode C, the front transfer rules of the sequential rolling and the batch rolling are both: judging the corresponding sub-rolling mode of the rolled piece as the sequential rolling, judging both the first process area and the second process area as empty state, determining the front transfer of the rolled piece at the position of the first mill front pusher and the first mill front rotating roller bed matched therewith in the spreader stage; judging the first process area as empty state and the second process area as non-empty state, the front transfer of the rolled piece is performed at the position of the second mill front pusher and the second mill front rotating roller bed matched therewith in the spreader stage; judging the first process area as non-empty state and the second process area as empty state, the front transfer of the rolled piece is performed at the position of the second mill front pusher and the second mill front rotating roller bed matched therewith when the rolled piece in the first process area enters the second process area; judging both the first process area and the second process area as non-empty state, the front transfer of the rolled piece is performed at the position of the second mill front pusher and the second mill front rotating roller bed matched therewith when the rolled piece in the first process area enters the second process area;

[0020] Under the rolling mode B and the rolling mode C, the rear transfer rules of the sequential rolling are: judging the pass number corresponding to the spreader stage as odd, determining the rear transfer of the rolled piece at the position of the first mill rear pusher and the first mill rear rotating roller bed matched therewith in the spreader stage; otherwise, determining the rear transfer of the rolled piece at the position of the first mill front pusher and the first mill front rotating roller bed matched therewith in the spreader stage;

[0021] Under the rolling mode B and the rolling mode C, the rear transfer rules of the batch rolling are: judging the rolled piece as the non-last rolled piece in the batch rolling in which the pass number corresponding to the spreader stage is odd and the rolled piece is directly tempered after the spreader stage, the rear transfer of the rolled piece is performed at the position of the second mill rear pusher and the second mill rear rotating roller bed matched therewith in the spreader stage, and the rolled piece is swung on the mill rear output roller bed for tempering; judging the rolled piece as the last rolled piece in the batch rolling in which the pass number corresponding to the spreader stage is odd and the rolled piece is directly tempered after the spreader stage, the rear transfer of the rolled piece is performed at the position of the first mill rear pusher and the first mill rear rotating roller bed matched therewith in the spreader stage, and the rolled piece is swung on the mill rear output roller bed for tempering;

[0022] When it is judged that the rolling piece is the non-last rolling piece in the batch rolling in which the number of passes corresponding to the spreading stage is even and the rolling piece is directly rolled after the spreading stage, the post-spreading turning is performed at the position of the first pre-rolling mill pusher and the first pre-rolling mill rotary roller matched therewith, and the post-turning rolling piece is swung on the post-rolling mill output roller for temperature holding; when it is judged that the rolling piece is the last rolling piece in the batch rolling in which the number of passes corresponding to the spreading stage is even and the rolling piece is directly rolled after the spreading stage, the post-spreading turning is performed at the position of the second pre-rolling mill pusher and the second pre-rolling mill rotary roller matched therewith, and the post-turning rolling piece is swung on the pre-rolling mill output roller for temperature holding, and the remaining rolling pieces in the batch are transported to the first process area for temperature holding as a whole.

[0023] When it is judged that the rolling piece is in the batch rolling in which the number of passes corresponding to the spreading stage is odd and the rolling piece is directly rolled after the spreading stage, the post-spreading turning is performed at the position of the first post-rolling mill pusher and the first post-rolling mill rotary roller matched therewith, and the post-turning rolling piece is swung on the post-rolling mill output roller for temperature holding; when it is judged that the rolling piece is in the batch rolling in which the number of passes corresponding to the spreading stage is even and the rolling piece is directly rolled after the spreading stage, the post-spreading turning is performed at the position of the first pre-rolling mill pusher and the first pre-rolling mill rotary roller matched therewith, and the post-turning rolling piece is swung on the post-rolling mill output roller or the post-rolling mill output roller for temperature holding.

[0024] In the rolling mode B and the rolling mode C, the process passes of the spreading stage are in turn: once pre-turning, several times of spreading rolling; the process passes of the extending stage are in turn: once post-turning, several times of extending rolling, once temperature holding and several times of extending rolling, or: once temperature holding, once post-turning and several times of extending rolling; in the rolling mode B, the process passes of the forming stage are: several times of forming rolling.

[0025] In the rolling mode B or the rolling mode C, the rolling piece is rolled in the first process area, the second process area and the third process area, and is turned twice at the corresponding pass according to the turning rule to complete all the rolling processes and then is thrown.

[0026] Further, it is provided that the pre-straightening mechanism constitutes the fourth process area, the cooling device constitutes the fifth process area, and the straightening mechanism constitutes the sixth process area.

[0027] It comprises:

[0028] Each rolling piece is sequentially numbered according to the order in which the rolling piece enters the first process area;

[0029] When any rolling piece leaves the sixth process area, the rolling piece is no longer numbered, and the other rolling pieces in each process area are deleted from their own numbers and inherit the number of the previous rolling piece as a new number.

[0030] Further, define the first roller table of the descaling box as the coordinate origin, and the direction of the rolling process is the positive direction of the x-axis.

[0031] Comprise:

[0032] Real-time acquisition of the front end coordinates and the rear end coordinates of each rolled piece, and matching with the corresponding coordinate area of each process area to determine the state of each process area as empty or non-empty.

[0033] Further, comprise:

[0034] Based on the pre-deployed camera, the process area is photographed to obtain a plurality of process image data;

[0035] Extract the internal contour of each process image data, and when the corresponding contour information is rolled piece information, add a tracking box to it to determine the state of each process area as empty or non-empty.

[0036] Beneficial effects:

[0037] From the above technical solution, the technical solution of the present application provides a medium plate rolling production line based on a single stand rolling mill, to improve the technical defects that the existing single stand rolling mill cannot simultaneously roll different slabs and transfer steel during medium plate rolling, thereby unable to improve the overall production capacity.

[0038] Specifically, the deployment of the rolling production line in the technical solution comprises, in sequence from front to back according to the rolling process: a second mill front push bed and a second mill front rotating roller table cooperating therewith, a first mill front push bed and a first mill front rotating roller table cooperating therewith, a four-roll reversible rolling mill, a first mill rear push bed and a first mill rear rotating roller table cooperating therewith, and a second mill rear push bed and a second mill rear rotating roller table cooperating therewith; wherein the four-roll reversible rolling mill comprises, in sequence: a mill front output roller table, a main body, and a mill rear output roller table. At this time, in the above new single stand medium plate production line arrangement, the next slab can be transferred in advance when the steel plate is rolled in the rolling mill; the slab is transferred in advance, which does not affect the rolling of the steel plate in the rolling mill, realizes the simultaneous rolling of the steel plate in the rolling mill and the transfer of the slab, achieves the purpose of efficient production and reduces energy consumption, solves the problem that the medium plate rolling mill cannot simultaneously roll and rotate the roller table, and improves the production efficiency.

[0039] It should be understood that all combinations of the aforementioned concepts and additional concepts described in greater detail below can be seen as part of the subject matter of the present disclosure, as long as such concepts do not contradict each other.

[0040] The foregoing and other aspects, embodiments and features of the present teachings are more fully described below, in connection with the accompanying drawings. Other aspects, embodiments and features of the present teachings will become apparent to those of ordinary skill in the art upon examination of the following description, or can be learned by practice of the present teachings. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present teachings. BRIEF DESCRIPTION OF DRAWINGS

[0041] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical, or nearly identical, component that is illustrated in various figures is represented with a like numeral. For purposes of clarity, not every component is called out in every drawing. Embodiments of various aspects of the present teachings will now be described, by way of example only, with reference to the accompanying drawings in which:

[0042] Figure 1 Deployment diagram of the single stand based plate mill line described in the present embodiment;

[0043] Figure 2 Process zoning diagram of the single stand based plate mill line described in the present embodiment;

[0044] Figure 3 Flow diagram of the single stand based plate rolling method described in the present embodiment;

[0045] Figure 4 Flow diagram of the present embodiment for establishing a tracking queue for a rolled piece and updating the queue;

[0046] Figure 5 Flow diagram of the present embodiment for confirming the status of each process zone;

[0047] Figure 6 Flow diagram of the present embodiment for confirming the status of each process zone. DETAILED DESCRIPTION

[0048] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application. Unless otherwise defined, the technical terms or scientific terms used herein should be understood as the common meanings thereof by those of ordinary skill in the art.

[0049] The terms "first", "second", and similar terms used herein do not denote any order, quantity, or importance, but are used to distinguish one element from another. Also, the terms "a" and "an" and "the" used herein do not denote a limitation of quantity and are used to denote the presence of at least one of something. The terms "comprises", "comprising", "includes", "including", "contains", "containing" and similar terms used herein are intended to be interpreted broadly and mean that the stated element or elements are present in the composition, method, or article of manufacture, but do not exclude the presence of one or more additional elements or steps. The terms "above", "below", "left", "right" and similar terms used herein are used for the purpose of description and do not denote absolute positions.

[0050] In view of the rolling characteristics of a single stand rolling mill, i.e., the forming rolling, the spreading rolling and the elongation rolling are completed on a single stand rolling mill when the slab is rolled on the single stand rolling mill. Thus, it has the advantages of simple equipment deployment and rolling process, and thus becomes the mainstream rolling equipment for medium plate rolling. However, due to the need for steel transfer before and after the spreading rolling of the steel plate, based on the current medium plate rolling production line deployment based on the single stand rolling mill, the rolling of the rolling mill and the rotation of the roller cannot be performed simultaneously, thereby affecting the production rhythm and production efficiency and restricting the capacity improvement. Based on this, the present embodiment aims to provide a medium plate rolling production line and rolling method based on a single stand rolling mill to solve the above technical problems.

[0051] The medium plate rolling production line and rolling method based on a single stand rolling mill described in the present embodiment will be described in detail below with reference to the accompanying drawings.

[0052] Embodiment 1

[0053] In combination with Figure 1 As shown in the figure, the rolling production line comprises, in order from front to back according to the rolling process: a second mill front push bed and a second mill front rotating roller cooperating therewith, a first mill front push bed and a first mill front rotating roller cooperating therewith, a four-roller reversible rolling mill, a first mill rear push bed and a first mill rear rotating roller cooperating therewith, and a second mill rear push bed and a second mill rear rotating roller cooperating therewith. The four-roller reversible rolling mill comprises, in order: a front mill output roller, a main body, and a rear mill output roller.

[0054] At this time, in the above new single-stand plate production line arrangement mode, the added second mill front pusher and the second mill front rotary roller cooperating therewith can be used for rolling piece rotation and centering, and the added second mill rear pusher and the second mill rear rotary roller cooperating therewith can be used for rolling piece rotation and centering. Thus, when the steel plate is rolled in the rolling mill, the next slab can be rotated in advance. When the slab is rotated 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 rotation of the slab are carried out at the same time, achieving efficient production and reducing energy consumption, solving the problem that the rolling of the plate mill and the rotation of the rotary roller cannot be carried out at the same time, and improving the production efficiency.

[0055] As a specific embodiment, the rolling production line further comprises the following equipment: the second mill front pusher and the second mill front rotary roller cooperating therewith are provided with a descaling box in front; and the second mill rear pusher and the second mill rear rotary roller cooperating therewith comprise, in sequence according to the rolling process, a pre-straightening machine, a cooling device and a straightening machine. At this time, the slab will sequentially pass through the above-mentioned equipment for sequential production to be rolled into a plate that meets the preset requirements. The straightening of the hot straightening machine is completed as a sequential production process

[0056] Embodiment 2

[0057] Based on the above-mentioned rolling production line, the present embodiment further discloses a 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] In combination Figure 2 As shown in FIG. 1, the second mill front pusher and the second mill front rotary roller cooperating therewith, the first mill front pusher and the first mill front rotary roller cooperating therewith constitute a first process area; the four-high reversible rolling mill constitutes a second process area; and the first mill rear pusher and the first mill rear rotary roller cooperating therewith, the second mill rear pusher and the second mill rear rotary roller cooperating therewith constitute a third process area.

[0059] At this time, in combination Figure 3 As shown in FIG. 1, the method comprises the following steps.

[0060] In step S102, the slab width and the target width of each rolling piece to be rolled are obtained to determine the rolling mode.

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

[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 elongation stage. The process stages corresponding to the rolling mode B include, in sequence, the forming stage, the spreading stage, and the elongation stage. At this time, the slab is transported to the front of the rolling mill for forming rolling, then is turned over, the spreading rolling is performed, then is turned over again after the spreading is completed, and then the elongation rolling is performed. The process stages corresponding to the rolling mode C include, in sequence, the spreading stage and the elongation stage. At this time, the slab is turned over during the rolling, then the spreading rolling is performed after the turning over is completed, then is turned over again after the spreading is completed to the target width, and then the elongation rolling is performed.

[0063] In step S104, it is determined that, when any of the rolled pieces adopts the rolling mode A, the rolled piece is turned over after sequentially passing through the first process area, the second process area, and the third process area; and it is determined that, when any of the rolled pieces adopts the rolling mode B or the rolling mode C, the corresponding sub-rolling mode of the rolled piece is determined, and it is determined whether there is another rolled piece in each process area to determine the turning over position according to the preset turning over rule.

[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 is that all the rolling stages of one rolled piece are completed, and then the next rolled piece is rolled. The batch rolling is that multiple rolled pieces of the same batch are simultaneously completed for one stage of rolling, and then the next stage of rolling is performed together.

[0065] Specifically, the rolling and turning over rule is as follows:

[0066] Under the rolling mode B, the front turning over rule of the sequential rolling and the batch rolling is that, when the number of passes of the forming stage of the rolled piece is even, the front turning over is performed at the position of the first mill front push bed and the first mill front rotating roller bed matched therewith; and when the number of passes of the forming stage of the rolled piece is odd, the front turning over is performed at the position of the first mill rear push bed and the first mill rear rotating roller bed matched therewith.

[0067] Under the rolling mode C, the front transfer steel rules of the sequential rolling and the batch rolling are as follows: when it is judged that the sub-rolling mode corresponding to the rolled piece is the sequential rolling, and it is judged that the first process area and the second process area are both empty states, it is determined that the rolled piece is subjected to the front transfer steel at the position of the first machine front pusher bed and the first machine front rotary roller bed cooperating therewith in the spread stage; when it is judged that the first process area is empty and the second process area is not empty, the rolled piece is subjected to the front transfer steel at the position of the second machine front pusher bed and the second machine front rotary roller bed cooperating therewith in the spread stage; when it is judged that the first process area is not empty and the second process area is empty, the rolled piece is subjected to the front transfer steel at the position of the second machine front pusher bed and the second machine front rotary roller bed cooperating therewith in the spread stage after the rolled piece in the first process area enters the second process area; when it is judged that the first process area and the second process area are both not empty, the rolled piece is subjected to the front transfer steel at the position of the second machine front pusher bed and the second machine front rotary roller bed cooperating therewith in the spread stage after the rolled piece in the first process area enters the second process area;

[0068] Under the rolling mode B and the rolling mode C, the rear transfer steel rule of the sequential rolling is as follows: when it is judged that the pass number corresponding to the spread stage is odd, it is determined that the rolled piece is subjected to the rear transfer steel at the position of the first machine rear pusher bed and the first machine rear rotary roller bed cooperating therewith in the spread stage; otherwise, it is determined that the rolled piece is subjected to the rear transfer steel at the position of the first machine front pusher bed and the first machine front rotary roller bed cooperating therewith in the spread stage.

[0069] Under the rolling mode B and the rolling mode C, the rear transfer steel rule of the batch rolling is as follows: when it is judged that the rolled piece is the non-last rolled piece in the batch rolling in which the pass number corresponding to the spread stage is odd and the rolled piece is directly subjected to the temperature holding after the spread stage, the rolled piece is subjected to the rear transfer steel at the position of the second machine rear pusher bed and the second machine rear rotary roller bed cooperating therewith in the spread stage, and is subjected to the temperature holding on the machine rear output roller bed; when it is judged that the rolled piece is the last rolled piece in the batch rolling in which the pass number corresponding to the spread stage is odd and the rolled piece is directly subjected to the temperature holding after the spread stage, the rolled piece is subjected to the rear transfer steel at the position of the first machine rear pusher bed and the first machine rear rotary roller bed cooperating therewith in the spread stage, and is subjected to the temperature holding on the machine rear output roller bed.

[0070] When it is judged that the rolling piece is the non-last rolling piece in the batch rolling in which the number of passes corresponding to the spreading stage is even and the rolling piece is directly rolled after the spreading stage, the post-spreading turning of the rolling piece is performed at the position of the first pre-rolling mill pusher and the first pre-rolling mill rotary roller, and the rolling piece is transported to the first process area after the post-spreading turning for waiting.

[0071] When it is judged that the rolling piece is the last rolling piece in the batch rolling in which the number of passes corresponding to the spreading stage is even and the rolling piece is directly rolled after the spreading stage, the post-spreading turning of the rolling piece is performed at the position of the second pre-rolling mill pusher and the second pre-rolling mill rotary roller, and the rolling piece is transported to the first process area after the post-spreading turning for waiting.

[0072] In the rolling mode B and the rolling mode C, the process passes of the spreading stage are in turn: once pre-turning, several times of spreading rolling; the process passes of the extending stage are in turn: once post-turning, several times of extending rolling, once waiting and several times of extending rolling, or: once waiting, once post-turning, several times of extending rolling; in the rolling mode B, the process passes of the forming stage are: several times of forming rolling.

[0073] In the rolling mode B or the rolling mode C, the rolling piece is rolled in the first process area, the second process area and the third process area, and is turned twice at the corresponding pass according to the turning rule to complete all the rolling processes and then is thrown.

[0074] In the rolling mode B or the rolling mode C, the rolling piece is rolled in the first process area, the second process area and the third process area, and is turned twice at the corresponding pass according to the turning rule to complete all the rolling processes and then is thrown.

[0075] At this time, the rolling mode is divided according to the process stage based on steps S102-S106, and the optimal transfer logic is defined in the rolling mode B and the rolling mode C requiring transfer, specifically, the transfer is performed at the second machine front pusher or the second machine rear pusher under different conditions to realize the transfer and the simultaneous rolling of other rolled pieces on the production line, thereby improving the utilization rate of the overall equipment and avoiding the blocking of the rolled pieces.

[0076] In order to facilitate the tracking of the rolled pieces to confirm the state of each process area, in combination with Figure 4 As shown in FIG. 1, when the pre-straightening mechanism constitutes the fourth process area, the cooling equipment constitutes the fifth process area, and the straightening mechanism constitutes the sixth process area, the tracking queue is established and the queue is updated through the following steps:

[0077] Step S202, sequentially number each rolled piece according to the order of the rolled pieces entering the first process area.

[0078] Step S204, when any rolled piece leaves the sixth process area, the rolled piece is no longer numbered, and the other rolled pieces in each process area delete their own numbers and inherit the number of the previous rolled piece as a new number.

[0079] For example, the slabs on the production line establish a queue according to the tapping order, the first tapped slab is labeled as mat1, the second tapped slab is labeled as mat2, and so on, and the nth tapped slab is labeled as matn; the queue adopts the first-in first-out rule, the tail of the steel plate rolled by 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 tapped slab is labeled as matn.

[0080] As a further specific embodiment, in combination with Figure 5 As shown in FIG. 1, when the first roller of the descaling box is defined as the coordinate origin, the direction of the rolled piece transportation according to the rolling process is defined as the positive direction of the x-axis, and the coordinate area corresponding to each process area is obtained, the specific confirmation of the state of each process area is further performed through the following way:

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

[0082] For example, the head position hmat1, hmat2, …, hmatn and the tail position tmat1, tmat2, …, tmatn of the rolled pieces mat1, mat2, …, matn are calculated, the area where the head and tail of the rolled piece are located is determined according to the head position and the tail position of the rolled piece, and it is determined whether the first process area, the second process area, …, the sixth process area are empty.

[0083] As another specific embodiment, in combination with Figure 6 As shown, the specific confirmation of the state of each process area is performed based on the image data processing mode:

[0084] Step S402, based on the pre-deployed camera, each process area is photographed to obtain a plurality of process image data.

[0085] Step S404, the internal contour of each process image data is extracted, and when the corresponding contour information is the rolled piece information, the tracking frame is added to it, and then the state of each process area is determined as empty or non-empty.

[0086] Embodiment 3

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

[0088] Steel plate number: B4A29134000;

[0089] Blank size: HxWxL=320mmx2290mmx4683mm;

[0090] Motherboard size: w x h x l = 20mm x 3599mm x 47675.78mm;

[0091] Control rolling process: uncontrolled rolling.

[0092] The slab width W is 2290mm, the motherboard width size is 3599mm, W<w, and the rolling needs to be expanded. The operator does not select the forming rolling, and the rolling process includes two stages of expansion rolling and extension rolling; therefore, the rolling mode C. The slab is transported to the rolling mill first, and then the steel is rotated. After the end of the steel rotation, the expansion rolling is performed, the expansion rolling is performed to the target width, and then the extension rolling is performed.

[0093] The steel plate B4A29134000 has three steel plates in front, the rolling mill area is the second process area mat3 rolling, the water cooling area is the fifth process area mat2 cooling, and the hot straightening area is mat1 straightening. Therefore, the steel plate is marked as mat4, the first process area is empty, and the second process area is not empty, so the mat4 is rotated on the second rolling mill front roller way for steel centering, and after the second process area is idle, it is transported to the second process area for rolling. After the expansion is completed, the first mill front steel roller is rotated, and then the extension stage rolling is performed. The specific rolling schedule is shown in Table 1.

[0094] Table 1 Steel plate B4A29134000 rolling schedule

[0095]

[0096] Example 4

[0097] Based on the above rolling method, one specific embodiment of batch rolling production under rolling mode C is as follows:

[0098] Steel plate number: B4A25006000;

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

[0100] Blank size: H x W x L = 320 mm x 2165 mm x 3616 mm;

[0101] Controlled rolling process: controlled rolling.

[0102] The slab width W is 2165 mm, the blank width size is 2935 mm, W < w, and it needs to be expanded and rolled, the operator does not select forming rolling, and the rolling process includes two stages of expansion rolling and extension rolling; therefore, rolling mode C. The slab is transported to the front of the rolling mill first, then expanded and rolled, expanded to the target width, then rotated, and then extended and rolled to the warm thickness for warm waiting, using 3 warm rolling, and after warm waiting is completed, it continues to be rolled.

[0103] The steel plate B4A25006000 has four steel plates in front, rolled in the second process area mat4 of the rolling mill area, warm waiting in the third process area mat3 of the post-rolling mill area, cooled in the fifth process area mat2 of the water cooling area, and straightened in the hot straightening area mat1, so the steel plate is marked as mat5, the first process area is empty, and the second process area is not empty, so mat5 is rotated and centered on the second pre-rolling mill roller before the rolling mill, and after the second process area is idle, it is transported to the second process area for rolling. After expansion is completed, the first post-rolling mill roller is rotated, then the extension stage is rolled, and rolled to the warm waiting thickness for warm waiting, mat5 is the last piece of the 3-piece batch rolling, rolled to the pre-rolling mill for warm waiting, then mat4 and mat3 are transported from the post-rolling mill to the pre-rolling mill for warm waiting together, and after warm waiting is completed, mat3, mat4, and mat4 are rolled in turn, and the specific rolling schedule is shown in Table 2.

[0104] Table 2 Rolling schedule of steel plate B4A25006000

[0105]

[0106]

[0107] While the application has been described by way of example with reference to preferred embodiments, it is to be understood that this application is not limited to the embodiments disclosed, but is intended to cover modifications and variations within the spirit and scope of the application. Therefore, the scope of the application is defined not by the detailed description of the application but by the following claims, wherein reference to an alternative embodiment includes reference to all features describing that embodiment.

Claims

1. A method for rolling medium-thick plates based on a single-stand rolling mill, characterized in that, The first process area is defined as the second front pusher bed and the second front rotary roller conveyor that cooperate with it, the first front pusher bed and the first front rotary roller conveyor that cooperate with it; the four-roll reversible rolling mill is defined as the second process area; the first rear pusher bed and the first rear rotary roller conveyor that cooperate with it, the second rear pusher bed and the second rear rotary roller conveyor that cooperate with it are defined as the third process area. Includes the following steps: Obtain the slab width and target width of each workpiece to be rolled to determine the rolling mode; Wherein, when the slab width is not less than the target width, rolling mode A is determined to be used; when the slab width is less than the target width, rolling mode B or rolling mode C is determined to be used. Wherein, the process stages corresponding to rolling mode A only include the extension stage; the process stages corresponding to rolling mode B include, in sequence, the forming stage, the widening stage, and the extension stage; the process stages corresponding to rolling mode C include, in sequence, the widening stage and the extension stage. 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 before being discarded; 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 it is obtained whether there are other rolled pieces in each process area so as to determine the steel transfer position according to the preset steel transfer rules. Wherein, the sub-rolling modes corresponding to rolling mode B and rolling mode C include sequential rolling and batch rolling; in, Under rolling mode B, the rules for forward steel transfer in both sequential rolling and batch rolling are as follows: when the number of passes in the forming stage of the rolled piece is even, forward steel transfer is performed at the position of the first mill front pusher and the first mill front rotating roller table that cooperates with it; when the number of passes in the forming stage of the rolled piece is odd, forward steel transfer is performed at the position of the first mill rear pusher and the first mill rear rotating roller table that cooperates with it. Under rolling mode C, the rules for pre-rolling of both sequential rolling and batch rolling are as follows: when the sub-rolling mode corresponding to the workpiece is sequential rolling, and when both the first process area and the second process area are empty, the workpiece is pre-rolled at the position of the first mill pusher and the corresponding first mill front rotary table; when the first process area is empty and the second process area is not empty, the workpiece is pre-rolled at the position of the second mill pusher and the corresponding second mill front rotary table. When it is determined that the first process area is not empty and the second process area is empty, the rolled piece in the first process area is operated to perform a pre-transfer of the rolled piece at the position of the second machine front pusher and the corresponding second machine front rotary roller table when it enters the second process area; when it is determined that both the first process area and the second process area are not empty, the rolled piece in the first process area is operated to perform a pre-transfer of the rolled piece at the position of the second machine front pusher and the corresponding second machine front rotary roller table when it enters the second process area. Under rolling modes B and C, the rules for the subsequent transfer of steel in the sequential rolling are as follows: when the number of passes corresponding to the widening stage is odd, the workpiece is determined to be transferred after the widening stage at the position of the first mill rear pusher and the corresponding first mill rear rotary roller table; otherwise, the workpiece is determined to be transferred after the widening stage at the position of the first mill front pusher and the corresponding first mill front rotary roller table. Under rolling modes B and C, the rules for the post-rolling of the batch rolling are as follows: When it is determined that the rolled piece is not the last rolled piece in a batch rolling process where the number of passes corresponding to the widening stage is odd and the piece is directly awaiting heating after the widening stage, the piece is transferred after the widening stage at the position of the second mill pusher and the corresponding second mill rotary roller table, and then oscillates on the mill output roller table to await heating; When it is determined that the rolled piece is the last rolled piece in a batch rolling process where the number of passes corresponding to the widening stage is odd and the piece is directly awaiting heating after the widening stage, the piece is transferred after the widening stage at the position of the first mill pusher and the corresponding first mill rotary roller table, and then oscillates on the mill output roller table to await heating. If the rolled piece is determined to be not the last piece in a batch of rolling mills where the number of passes corresponding to the widening stage is even and the piece is directly awaiting heating after the widening stage, the piece is transferred after the widening stage at the position of the first mill pusher and the corresponding first mill front rotary table, and then transported to the mill output roller table for oscillation and heating. If the rolled piece is determined to be the last piece in a batch of rolling mills where the number of passes corresponding to the widening stage is even and the piece is directly awaiting heating after the widening stage, the piece is transferred after the widening stage at the position of the second mill pusher and the corresponding second mill front rotary table, and then oscillated on the mill output roller table for heating. The remaining rolled pieces in this batch awaiting heating after the mill are transported as a whole to the first process area for heating. If it is determined that the number of passes corresponding to the widening stage is odd and the extension stage is directly performed after the widening stage, the workpiece is transferred after the widening stage at the position of the first mill rear pusher and the corresponding first mill rear rotary roller table, and then rolled to the required thickness after the transfer, and then oscillated on the mill rear output roller table to wait for the temperature; if it is determined that the number of passes corresponding to the widening stage is even and the extension stage is directly performed after the widening stage, the workpiece is transferred after the widening stage at the position of the first mill front pusher and the corresponding first mill front rotary roller table, and then rolled to the required thickness after the transfer, and then oscillated on the mill rear output roller table or mill rear output roller table to wait for the temperature. In the rolling modes B and C, the process passes of the widening stage are as follows: one pre-transfer rolling and several widening rolling passes; the process passes of the elongation stage are as follows: one post-transfer rolling, several elongation rolling passes, one preheating stage and several elongation rolling passes, or: one preheating stage, one post-transfer rolling, and several elongation rolling passes; in the rolling mode B, the process passes of the forming stage are as follows: several forming rolling passes. In rolling mode B or rolling mode C, the workpiece is rolled in the first process zone, the second process zone, and the third process zone, and is rolled twice in the corresponding pass according to the steel-turning rules to complete all rolling processes before being discarded.

2. The method for rolling medium-thick plates based on a single-stand rolling mill according to claim 1, characterized in that, The pre-straightening mechanism is designated as the fourth process zone, the cooling equipment as the fifth process zone, and the straightening mechanism as the sixth process zone. include: Each rolled piece is sequentially numbered according to the order in which it enters the first process area; When any rolled piece leaves the sixth process zone, the rolled piece is no longer numbered, and the other rolled pieces in each process zone have their own numbers deleted and inherit the number of the previous rolled piece as the new number.

3. The method for rolling medium-thick plates based on a single-stand rolling mill according to claim 1, characterized in that, Define the first roller of the descaling box as the origin of the coordinate system, and take the direction of the workpiece transport in the rolling process as the positive direction of the x-axis to obtain the coordinate region corresponding to each process zone. include: The front and rear coordinates of each rolled piece are acquired in real time and matched with the coordinate regions corresponding to each process area to determine whether each process area is empty or not.

4. The method for rolling medium-thick plates based on a single-stand rolling mill according to claim 1, characterized in that, include: Pre-deployed cameras are used to capture images of each process area to obtain several process image data. The internal contours of each process image data are extracted, and when the corresponding contour information is the rolling part information, a tracking box is added to it to determine whether the state of each process area is empty or not.

5. A medium-thick plate rolling production line based on a single-stand rolling mill, characterized in that, Used to implement the method according to any one of claims 1 to 4; The rolling process, from front to back, includes: a second mill front pusher and its associated second mill front rotary table, a first mill front pusher and its associated first mill front rotary table, a four-high reversible mill, a first mill rear pusher and its associated first mill rear rotary table, and a second mill rear pusher and its associated second mill rear rotary table; wherein, the four-high reversible mill includes, in sequence: a mill front output table, a main body, and a mill rear output table.

6. The medium-thick plate rolling production line based on a single-stand rolling mill according to claim 5, characterized in that, The second mill front pusher and the second mill front rotary roller conveyor that cooperate with it are equipped with a descaling box; the second mill rear pusher and the second mill rear rotary roller conveyor that cooperate with it include, in sequence according to the rolling process: a pre-straightening machine, a cooling device and a straightening machine.

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