CN114192584B - Medium plate pressing regulation distribution method and system - Google Patents
Medium plate pressing regulation distribution method and system Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 120
- 238000003825 pressing Methods 0.000 title claims abstract description 81
- 238000009826 distribution Methods 0.000 title claims abstract description 66
- 238000005096 rolling process Methods 0.000 claims abstract description 244
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 152
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
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Abstract
The invention discloses a medium plate pressing regulation distribution method and a medium plate pressing regulation distribution system. According to the invention, by constructing the rolling schedule case library, the rolling schedule case library stores optimal rolling schedule data corresponding to plates with various steel grades, various blank sizes, various target steel plate size ranges and various temperature control marks, the optimal rolling schedule data corresponding to the current plate is searched from the rolling schedule case library according to the steel grades, the blank sizes, the target steel plate sizes and the temperature control marks of the current plate, and the rolling schedule of the current plate is distributed according to the blank sizes, the target steel plate sizes and the corresponding optimal rolling schedule data of the current plate, so that the most suitable rolling schedule can be distributed for plates with different steel grades, different blank sizes, different target steel plate sizes and different temperature control marks, and the rolling schedule distribution is more reasonable.
Description
Technical Field
The invention relates to the technical field of automatic control of medium plates, in particular to a method and a system for determining pressing distribution of a medium plate.
Background
The rolling schedule is the most basic core content in a medium plate rolling system, a single frame or a double frame is generally adopted in a medium plate production line, a reversible reciprocating rolling mode is implemented, whether the rolling schedule distribution reasonably influences the overall production efficiency of the production line or not, and in addition, the size, the plate shape quality, the performance and the like of a rolled steel plate can be directly influenced. Therefore, in order to improve the yield of the heavy and medium plate mill and the stability of automatic production, the requirements of various post-rolling indexes are met, and the optimal rolling regulations are required to be given as far as possible.
The rolling process of the medium plate is generally divided into a plurality of stages, the rolling schedule distribution principle of other stages except the finish rolling stage is generally distributed according to the maximum allowable rolling reduction, namely the pass allowable rolling reduction combining the equipment capacity and the process requirement is considered, in addition, the steel transferring position and the temperature control position requirement in the rolling process are also considered, the finish rolling stage is generally in addition to the equipment capacity, the special process requirement and the rolled plate shape requirement are also required to be integrated, and the medium plate production line without plate shape control equipment is particularly aimed at. In the automatic rolling process, the rolling schedule calculation is automatically completed by a computer through introducing related limiting conditions and distribution rules by a control system, and the requirements of common steel type and specification slabs can be met, but the rolling schedule calculated by the method is not ideal for some specific steel type slabs, limit specification slabs and slabs with special process requirements. In addition, when slabs with the same steel grade and the same specification are rolled in batches, the calculated rolling regulation data are different due to the tiny change of part of parameters in the calculation process, so that the rolling stability is affected. Therefore, there is a need for a more optimal method of depressing procedure distribution that is suitable for such situations.
Disclosure of Invention
The invention provides a medium plate pressing rule distribution method and a system, which solve the technical problem that the traditional medium plate pressing rule distribution method is unreasonable.
In one aspect, the present invention provides the following technical solutions:
a method of medium plate reduction protocol distribution comprising:
constructing a rolling procedure case library, wherein the rolling procedure case library stores optimal rolling procedure data corresponding to plates with various steel grades, various blank sizes, various target steel plate size ranges and various temperature control marks;
acquiring the steel grade, the blank size, the target steel plate size and the temperature control mark of the current plate;
according to the steel grade, blank size, target steel plate size and temperature control mark of the current plate, searching out the optimal rolling rule data corresponding to the current plate from the rolling rule case library;
and distributing the rolling schedule of the current plate according to the blank size of the current plate, the target steel plate size and the corresponding optimal rolling schedule data.
Preferably, the pressing procedure case library comprises a first table, a second table and a third table, wherein the first table stores steel type indexes corresponding to various steel types, the second table stores various steel type indexes, various blank size ranges, various target steel plate size ranges and procedure numbers corresponding to various temperature control marks, and the third table stores optimal pressing procedure data corresponding to various procedure numbers;
The method for searching the optimal rolling schedule data corresponding to the current plate from the rolling schedule case library according to the steel grade, the blank size, the target steel plate size and the temperature control mark of the current plate comprises the following steps:
retrieving a steel grade index corresponding to the current plate from the first table according to the steel grade of the current plate;
retrieving the corresponding procedure number of the current plate from the second table according to the blank size of the current plate, the target steel plate size, the temperature control mark and the corresponding steel grade index;
and retrieving the optimal pressing rule data corresponding to the current plate from the third table according to the rule number corresponding to the current plate.
Preferably, the optimal reduction protocol data comprises total number of passes, reduction type corresponding to each pass, recommended reduction, stage number and pass mark;
the method for distributing the rolling schedule of the current plate according to the blank size of the current plate, the target steel plate size and the corresponding optimal rolling schedule data comprises the following steps:
setting the total number of passes in the optimal rolling schedule data corresponding to the current plate as the total number of rolling passes of the current plate;
determining the rolling stage of the current plate and the number of the passes of each rolling stage according to the stage number and the pass mark corresponding to each pass in the optimal rolling schedule data corresponding to the current plate;
Determining the target thickness of each rolling stage of the current plate according to the blank size, the target steel plate size, the steel conversion thickness and the temperature control thickness of the current plate;
calculating the target rolling reduction and the target outlet thickness of each pass of the current plate according to the blank size, the target thickness, the rolling reduction type and the recommended rolling reduction in the optimal rolling schedule data corresponding to the current plate;
if the target outlet thickness of the last pass of the current plate meets the requirement of the target steel plate size, calculating other set values according to the target outlet thickness of each pass of the current plate.
Preferably, the depression type includes absolute depression and a depression distribution ratio;
the method for calculating the target rolling reduction and the target outlet thickness of each pass of the current plate according to the blank size, the target thickness, the rolling reduction type and the recommended rolling reduction in the optimal rolling procedure data corresponding to the current plate comprises the following steps:
if the pressing types in the optimal pressing rule data corresponding to the current plate are absolute pressing, converting the recommended pressing quantity in the optimal pressing rule data into the pressing distribution proportion of the current plate;
and calculating the target rolling reduction and the target outlet thickness of each pass of the current plate according to the blank size, the rolling distribution proportion and the target thickness of the current plate.
Preferably, the calculating the target rolling reduction and the target outlet thickness of each pass of the current plate according to the blank size, the rolling distribution ratio and the target thickness of the current plate includes:
calculating the theoretical rolling reduction and the theoretical outlet thickness of each pass of the current plate according to the blank size, the rolling distribution proportion and the target thickness of the current plate;
sequentially judging whether the theoretical reduction of the current pass is smaller than an absolute reduction limit value and the theoretical reduction is smaller than the reduction limit value from the beginning of the first pass to the ending of the last pass of the current plate;
if yes, setting the theoretical reduction of the current pass as the target reduction of the current pass, and taking the difference of the target outlet thickness of the last pass minus the target reduction of the current pass as the target outlet thickness of the current pass;
otherwise, the product of the target outlet thickness of the last pass and the reduction rate limiting value and the smaller absolute reduction rate limiting value are set as the target reduction rate of the current pass, the difference of the target outlet thickness of the last pass minus the target reduction rate of the current pass is taken as the target outlet thickness of the current pass, the difference of the theoretical reduction rate of the current pass minus the target reduction rate is calculated, and the difference is distributed to each pass after the current pass according to the reduction distribution proportion of all passes after the current pass, so that the new theoretical reduction rate of each pass after the current pass is obtained.
On the other hand, the invention also provides the following technical scheme:
a medium plate reduction protocol dispensing system comprising:
the database construction module is used for constructing a rolling procedure case library, wherein the rolling procedure case library stores optimal rolling procedure data corresponding to plates with various steel grades, various blank sizes, various target steel plate size ranges and various temperature control marks;
the data acquisition module is used for acquiring the steel grade, the blank size, the target steel plate size and the temperature control mark of the current plate;
the data retrieval module is used for retrieving the optimal rolling rule data corresponding to the current plate from the rolling rule case library according to the steel grade, the blank size, the target steel plate size and the temperature control mark of the current plate;
the rolling rule distribution module is used for distributing rolling rules of the current plate according to the blank size of the current plate, the target steel plate size and the corresponding optimal rolling rule data.
Preferably, the pressing procedure case library comprises a first table, a second table and a third table, wherein the first table stores steel type indexes corresponding to various steel types, the second table stores various steel type indexes, various blank size ranges, various target steel plate size ranges and procedure numbers corresponding to various temperature control marks, and the third table stores optimal pressing procedure data corresponding to various procedure numbers;
The data retrieval module is further configured to:
retrieving a steel grade index corresponding to the current plate from the first table according to the steel grade of the current plate;
retrieving the corresponding procedure number of the current plate from the second table according to the blank size of the current plate, the target steel plate size, the temperature control mark and the corresponding steel grade index;
and retrieving the optimal pressing rule data corresponding to the current plate from the third table according to the rule number corresponding to the current plate.
Preferably, the optimal reduction protocol data comprises total number of passes, reduction type corresponding to each pass, recommended reduction, stage number and pass mark;
the pressing procedure distribution module is further configured to:
setting the total number of passes in the optimal rolling schedule data corresponding to the current plate as the total number of rolling passes of the current plate;
determining the rolling stage of the current plate and the number of the passes of each rolling stage according to the stage number and the pass mark corresponding to each pass in the optimal rolling schedule data corresponding to the current plate;
determining the target thickness of each rolling stage of the current plate according to the blank size, the target steel plate size, the steel conversion thickness and the temperature control thickness of the current plate;
calculating the target rolling reduction and the target outlet thickness of each pass of the current plate according to the blank size, the target thickness, the rolling reduction type and the recommended rolling reduction in the optimal rolling schedule data corresponding to the current plate;
If the target outlet thickness of the last pass of the current plate meets the requirement of the target steel plate size, calculating other set values according to the target outlet thickness of each pass of the current plate.
On the other hand, the invention also provides the following technical scheme:
an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements any one of the above-described medium plate pressing protocol allocation methods when executing the program.
On the other hand, the invention also provides the following technical scheme:
a computer readable storage medium that when executed implements any of the above medium plate reduction protocol distribution methods.
The one or more technical schemes provided by the invention have at least the following technical effects or advantages:
by constructing a rolling schedule case library, the rolling schedule case library stores optimal rolling schedule data corresponding to plates with various steel grades, various blank sizes, various target steel plate size ranges and various temperature control marks, the optimal rolling schedule data corresponding to the current plate is retrieved from the rolling schedule case library according to the steel grades, the blank sizes, the target steel plate sizes and the temperature control marks of the current plate, rolling schedules of the current plate are distributed according to the blank sizes, the target steel plate sizes and the corresponding optimal rolling schedule data of the current plate, and most suitable rolling schedules can be distributed for plates with different steel grades, different blank sizes, different target steel plate sizes and different temperature control marks, and the rolling schedule distribution is more reasonable.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for distributing a medium plate pressing schedule in an embodiment of the invention;
FIG. 2 is a schematic diagram of a press down protocol case library according to an embodiment of the present invention;
FIG. 3 is a diagram of an operator interface of a press down protocol case library according to an embodiment of the present invention;
FIG. 4 is a schematic view of the structure of a medium plate pressing schedule distribution system according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention solves the technical problem that the traditional medium plate pressing rule distribution method is unreasonable by providing the medium plate pressing rule distribution method and the medium plate pressing rule distribution system.
In order to better understand the technical scheme of the present invention, the following detailed description will refer to the accompanying drawings and specific embodiments.
First, the term "and/or" appearing herein is merely an association relationship describing associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
As shown in fig. 1, the medium plate pressing schedule distribution method of the present embodiment includes:
step S1, constructing a pressing procedure case library, wherein the pressing procedure case library stores optimal pressing procedure data corresponding to plates with various steel grades, various blank sizes, various target steel plate size ranges and various temperature control marks;
s2, obtaining the steel grade, the blank size, the target steel plate size and the temperature control mark of the current plate;
step S3, searching out the optimal rolling rule data corresponding to the current plate from the rolling rule case library according to the steel grade, the blank size, the target steel plate size and the temperature control mark of the current plate;
and S4, distributing the rolling schedule of the current plate according to the blank size of the current plate, the target steel plate size and the corresponding optimal rolling schedule data.
In step S1, as shown in fig. 2, the pressing procedure case library includes a first table, a second table and a third table, the first table stores steel type indexes corresponding to multiple steel types, the second table stores multiple steel type indexes, multiple blank size ranges, multiple target steel plate size ranges and procedure numbers corresponding to multiple temperature control marks, and the third table stores optimal pressing procedure data corresponding to multiple procedure numbers. The blank size range is limited by parameters such as a blank length maximum value, a blank length minimum value, a blank thickness maximum value, a blank thickness minimum value, a blank width maximum value, a blank width minimum value and the like; the target steel plate size range is limited by parameters such as a maximum target steel plate width, a minimum target steel plate width, a maximum target steel plate thickness, a minimum target steel plate thickness and the like; the temperature control mark comprises 0 and 1, wherein 0 represents non-temperature control, and 1 represents temperature control; the procedure number is the external direct index of each procedure in the pressing procedure case library, the naming rule of the procedure number can be determined according to the actual condition of the production line, and the current procedure characteristic item can be obviously represented, for example, the procedure number can contain information such as steel grades, specifications, teams and the like; the optimal rolling schedule data comprises total number of passes, pass number, rolling type corresponding to each pass, recommended rolling amount, stage number and pass mark, and the optimal rolling schedule data corresponding to the specific plate with specific steel type, specific blank size, specific target steel plate size and specific temperature control mark is rolling schedule data which is obtained according to production experience and is most suitable for the specific plate.
The total number of passes represents the number of passes required in the rolling process of the current plate, and comprises loaded passes and empty passes; the reduction type represents a given mode of the reduction of the current pass, 1 represents absolute reduction, 2 represents reduction distribution proportion, and an operator can give the reduction according to the requirement; the rolling amount represents the pass rolling amount, corresponds to the rolling type, and is given as a relative value if the rolling type is a relative rolling mode, and is given as an absolute value if the rolling type is an absolute rolling mode; the stage number represents a rolling stage corresponding to the current pass, the rolling process of the medium plate can be divided into a forming stage (0), a widening stage (1) and a finish rolling stage (2) according to the number of times of steel conversion, and if a temperature control rolling mode is adopted, the finish rolling stage is divided into a stage (3) before temperature control and a stage (4) after temperature control; the pass mark represents a corresponding mark of the current pass, 0 represents a common pass, 1 represents pre-pass steel turning, 2 represents post-pass temperature control, and 3 represents an empty pass.
In this embodiment, as shown in fig. 3, the operation interface of the depressing procedure case library corresponds to the data in the first table, the second table and the third table, and the storing process is completed through the operation interface, and the storing modes are divided into three modes:
Newly-built procedure number; inputting a new procedure number in a frame behind the procedure number in fig. 3, inputting an applicable steel grade, a specification range value, a total number of passes, a temperature control mark, a pressing type, a pressing amount, a stage number and a pass mark of the new procedure in a lower box, clicking a right lower part for storage, and storing the currently input procedure number and corresponding data into a pressing procedure case library;
calling the existing procedure number; in fig. 3, a required procedure number is selected from a pull-down menu of the procedure library, or the procedure number is manually input, the procedure is clicked and called, the data item corresponding to the currently selected procedure number can be displayed on a picture, an operator can modify the data item according to the need, and the data corresponding to the current procedure number in the case library can be updated by clicking and storing.
Selecting a rolled steel plate; and inputting a plate blank number which is recently rolled on the production line below the plate blank number in fig. 3, or selecting a corresponding plate blank number from a pull-down menu, clicking a query procedure, namely, displaying the related data of the selected plate blank at a corresponding position of an interface, modifying a data item by an operator according to the need, creating a procedure number, clicking and storing the procedure number and the corresponding data which are currently input, and storing the procedure number and the corresponding data into a pressing procedure case library.
In step S2, the blank size includes a blank width, a blank thickness, and a blank length, and the target steel plate size includes a target steel plate thickness and a target steel plate width.
The step S3 comprises the following steps: retrieving a steel grade index corresponding to the current plate from the first table according to the steel grade of the current plate; retrieving the corresponding procedure number of the current plate from the second table according to the blank size of the current plate, the target steel plate size, the temperature control mark and the corresponding steel grade index; and retrieving the optimal pressing rule data corresponding to the current plate from the third table according to the rule number corresponding to the current plate. If a plurality of case records are found, returning to the latest saved case record.
The step S4 includes: setting the total number of passes in the optimal rolling schedule data corresponding to the current plate as the total number of rolling passes of the current plate; determining the rolling stage of the current plate and the number of the passes of each rolling stage according to the stage number and the pass mark corresponding to each pass in the optimal rolling schedule data corresponding to the current plate; determining the target thickness of each rolling stage of the current plate according to the blank size, the target steel plate size, the steel conversion thickness and the temperature control thickness of the current plate; calculating the target rolling reduction and the target outlet thickness of each pass of the current plate according to the blank size, the target thickness, the rolling reduction type and the recommended rolling reduction in the optimal rolling schedule data corresponding to the current plate; if the target outlet thickness of the last pass of the current plate meets the requirement of the target steel plate size, calculating other set values according to the target outlet thickness of each pass of the current plate.
In this example, the steel grade of the current plate is Q345D, the blank size is 200.0x1368.0x1850.0mm, the target steel plate size is 5.9x2655mm, the blank thickness is 200mm, the target steel plate thickness is 5.9mm, and the relevant parameters of rolling the current plate are shown in table 1 and table 2. As can be seen from table 2, the temperature control flag of the current plate is no temperature control.
| Parameter name | Numerical value |
| Maximum rolling force/kN | 5000 |
| Maximum moment/kN m | 2000 |
| Maximum power/kW | 7000 |
| Diameter/mm of support roller | 2000 |
| Work roll diameter/mm | 1000 |
TABLE 1
TABLE 2
Through step S3, searching the corresponding optimal rolling procedure from the rolling procedure case base according to the information such as the steel grade, the blank size, the target steel plate size, the temperature control mark and the like of the current plate, returning a case with the procedure number of Q345D-5.9x2655-A from the case base, and corresponding optimal rolling procedure data are shown in table 3.
| Parameter name | Numerical value |
| Total number of passes | 13 |
| Type of depression | 1,1,1,1,1,1,1,1,1,1,1,1,1 |
| Suggested reduction | 34,27,33,27,24,18,14,11,3.5,1.9,1.0,0.6,0 |
| Stage number | 1,1,2,2,2,2,2,2,2,2,2,2,2 |
| Pass mark | 0,0,1,0,0,0,0,0,0,0,0,0,3 |
TABLE 3 Table 3
As can be seen from table 3, the total number of passes in the optimal rolling schedule data is 13, so the total number of rolling passes of the current plate is set to 13; according to the stage number and the pass mark corresponding to each pass in the optimal reduction rule data, determining that the rolling stage of the current plate is divided into two stages of widening and finish rolling, wherein the number of passes in the widening stage is 2, and the number of passes in the finish rolling stage is 11; according to the principle of unchanged volume and considering expansion of the steel plate in a thermal state, the target thickness of the current plate in the widening stage is determined to be 140.44 according to the blank size, the target steel plate size, the steel conversion thickness and the temperature control thickness of the current plate, and the target thickness of the finish rolling stage is determined to be 5.95.
Because the rolling types in the optimal rolling schedule data are absolute rolling, in order to ensure that the target outlet thickness of each stage absolutely meets the target requirement, the recommended rolling amount given in the case is converted into the rolling distribution proportion of the current plate, namely the rolling distribution proportion of 2 passes in the widening stage is 34:27, the rolling distribution proportion of 11 passes in the finish rolling stage is 33:27:24:18:14:11:3.5:1.9:1.0:0.6:0, and the final pass is an empty pass. Thus, in this implementation, the types of depressions include absolute depressions and a depression distribution ratio; the method for calculating the target rolling reduction and the target outlet thickness of each pass of the current plate according to the blank size, the target thickness, the rolling reduction type and the recommended rolling reduction in the optimal rolling procedure data corresponding to the current plate comprises the following steps:
if the pressing types in the optimal pressing rule data corresponding to the current plate are absolute pressing, converting the recommended pressing quantity in the optimal pressing rule data into the pressing distribution proportion of the current plate;
and calculating the target rolling reduction and the target outlet thickness of each pass of the current plate according to the blank size, the rolling distribution proportion and the target thickness of the current plate.
Further, the calculating the target rolling reduction and the target outlet thickness of each pass of the current plate according to the blank size, the rolling distribution ratio and the target thickness of the current plate comprises:
Calculating the theoretical rolling reduction and the theoretical outlet thickness of each pass of the current plate according to the blank size, the rolling distribution proportion and the target thickness of the current plate;
sequentially judging whether the theoretical reduction of the current pass is smaller than an absolute reduction limit value and the theoretical reduction is smaller than the reduction limit value from the beginning of the first pass to the ending of the last pass of the current plate;
if yes, setting the theoretical reduction of the current pass as the target reduction of the current pass, and taking the difference of the target outlet thickness of the last pass minus the target reduction of the current pass as the target outlet thickness of the current pass;
otherwise, the smaller one of the product of the target outlet thickness of the last pass and the reduction rate limit value and the absolute reduction rate limit value is set as the target reduction rate of the current pass, the difference of the target outlet thickness of the last pass minus the target reduction rate of the current pass is taken as the target outlet thickness of the current pass, the difference of the theoretical reduction rate of the current pass minus the target reduction rate is calculated, the difference is distributed to each pass after the current pass according to the reduction distribution proportion of all passes after the current pass, and the new theoretical reduction rate of each pass after the current pass is obtained.
The stock thickness of the current sheet is 200, the target thickness of the stretching stage is 140.44, and the target thickness of the finish rolling stage is 5.95, so that the total recommended reduction of the stretching stage is about 60, the total recommended reduction of the finish rolling stage is about 134, the reduction distribution ratio of 2 passes according to the stretching stage is 34:27, the reduction distribution ratio of 11 passes in the finish rolling stage is 33:27:24:18:14:11:3.5:1.9:1.0:0.6:0, and the theoretical reduction and theoretical outlet thicknesses of 13 passes are shown in table 4.
TABLE 4 Table 4
As can be seen from table 2, the rolling of the current sheet material has an absolute reduction limit value (35 mm) and a reduction limit value (40%), and if the theoretical reduction per pass in table 4 is smaller than the absolute reduction limit value and the theoretical reduction is smaller than the reduction limit value, the theoretical reduction in table 4 can be directly used as the target reduction per pass and the theoretical outlet thickness in table 4 can be used as the target outlet thickness per pass. The theoretical reduction rate of the current pass is the ratio of the theoretical reduction rate of the current pass to the target outlet thickness of the last pass. It is therefore necessary to determine whether the theoretical reduction per pass in table 4 is less than the absolute reduction limit and whether the theoretical reduction is less than the reduction limit.
It is apparent that the theoretical reduction of each pass in table 4 is less than the absolute reduction limit, and the target exit thickness of the last pass of the first pass can be regarded as the billet thickness 200, so the theoretical reduction of the first pass is 33.96/200=16.98%, less than the reduction limit of 40%, and thus the target reduction of the first pass is set to 33.96 and the target exit thickness is set to 167.31. The theoretical reduction rate of the second to seventh passes can be judged to be smaller than the reduction rate limiting value in turn, and the target reduction rate and the target outlet thickness of the seventh pass are respectively 14.04 and 24. The theoretical reduction rate of the eighth pass is 11.03/24=46%, the product of the target outlet thickness of the seventh pass and the reduction rate limit value exceeds the reduction rate limit value is 24×40% =9.6, and is smaller than the absolute reduction rate limit value, so that the target reduction rate of the eighth pass is 9.6, the difference of the target outlet thickness of the seventh pass minus the target reduction rate of the eighth pass is 24-9.6=14.4, the difference of the theoretical reduction rate of the eighth pass minus the target reduction rate is 11.03-9.6=1.43, the reduction distribution ratio of all passes after the eighth pass is 3.5:1.9:1.0:0.6:0, and the distribution reduction rate of each pass after the eighth pass is 0.71, 0.38, 0.21, 0.12, 0, and each new theoretical reduction rate after the eighth pass is 3.51+0.71, 1.91+0.38, 1+0.21.0.6, 0.6+0, and the new theoretical reduction rates after the eighth pass are obtained, respectively, as shown in tables.
TABLE 5
Then, it is continuously determined whether the theoretical reduction of the ninth to last pass is smaller than the absolute reduction limit value and the theoretical reduction is smaller than the reduction limit value, as can be seen from table 5, the theoretical reduction of the ninth to last pass is smaller than the absolute reduction limit value and the theoretical reduction is smaller than the reduction limit value, so that table 5 can be the final target reduction and the target outlet thickness of each pass.
Of course, the present embodiment also checks the rolling reduction calculation values of each pass in combination with the pass calculation temperature, the pass calculation speed, the rolling force upper limit value, the moment upper limit value, and the like.
And S4, the thickness of the target outlet of the last pass is 5.95 (thermal state value), the thickness of the target steel plate is 5.9mm (cold state value), the thickness of the target outlet of the last pass meets the requirement of the target steel plate size, and other set values are calculated according to the thickness of the target outlet of each pass of the current plate. If the target outlet thickness of the last pass does not meet the requirement of the target steel plate size, completely discarding the searched optimal rolling schedule data, and carrying out rolling schedule distribution again according to the original data of the blank according to the common rolling schedule distribution calculation principle. The results of calculating other set points based on the target exit thickness for each pass of the current sheet are shown in table 6.
TABLE 6
As can be seen from the foregoing, in this embodiment, a rolling schedule case library is constructed, the rolling schedule case library stores optimal rolling schedule data corresponding to plates with multiple steel types, multiple blank sizes, multiple target steel plate size ranges and multiple temperature control marks, the steel types, the blank sizes, the target steel plate sizes and the temperature control marks of the current plate are obtained, the optimal rolling schedule data corresponding to the current plate is retrieved from the rolling schedule case library according to the steel types, the blank sizes, the target steel plate sizes and the temperature control marks of the current plate, and rolling schedules of the current plate are distributed according to the blank sizes, the target steel plate sizes and the corresponding optimal rolling schedule data of the current plate, so that most suitable rolling schedules can be distributed for plates with different steel types, different blank sizes, different target steel plate sizes and different temperature control marks, and rolling schedule distribution is more reasonable.
As shown in fig. 4, the present embodiment further provides a medium plate pressing schedule distribution system, including:
the database construction module is used for constructing a rolling procedure case library, and the rolling procedure case library stores optimal rolling procedure data corresponding to various steel types, various blank sizes, various target steel plate size ranges and various temperature control marked plates;
The data acquisition module is used for acquiring the steel grade, the blank size, the target steel plate size and the temperature control mark of the current plate;
the data retrieval module is used for retrieving the optimal rolling rule data corresponding to the current plate from the rolling rule case library according to the steel grade, the blank size, the target steel plate size and the temperature control mark of the current plate;
the rolling rule distribution module is used for distributing rolling rules of the current plate according to the blank size of the current plate, the target steel plate size and the corresponding optimal rolling rule data.
The pressing procedure case library comprises a first table, a second table and a third table, wherein the first table stores steel grade indexes corresponding to various steel grades, the second table stores the various steel grade indexes, various target steel plate size ranges and procedure numbers corresponding to various temperature control marks, and the third table stores optimal pressing procedure data corresponding to various procedure numbers;
the data retrieval module is also used for:
retrieving a steel grade index corresponding to the current plate from the first table according to the steel grade of the current plate;
retrieving the corresponding procedure number of the current plate from the second table according to the blank size of the current plate, the target steel plate size, the temperature control mark and the corresponding steel grade index;
And retrieving the optimal pressing rule data corresponding to the current plate from the third table according to the rule number corresponding to the current plate.
The optimal rolling schedule data comprises total number of passes, rolling type corresponding to each pass, recommended rolling amount, stage number and pass mark;
the pressing procedure distribution module is further used for:
setting the total number of passes in the optimal rolling schedule data corresponding to the current plate as the total number of rolling passes of the current plate;
determining the rolling stage of the current plate and the number of the passes of each rolling stage according to the stage number and the pass mark corresponding to each pass in the optimal rolling schedule data corresponding to the current plate;
determining the target thickness of each rolling stage of the current plate according to the blank size, the target steel plate size, the steel conversion thickness and the temperature control thickness of the current plate;
calculating the target rolling reduction and the target outlet thickness of each pass of the current plate according to the blank size, the target thickness, the rolling reduction type and the recommended rolling reduction in the optimal rolling schedule data corresponding to the current plate;
if the target outlet thickness of the last pass of the current plate meets the requirement of the target steel plate size, calculating other set values according to the target outlet thickness of each pass of the current plate.
The embodiment can distribute the most suitable pressing rules for the plates with different steel types, different blank sizes, different target steel plate sizes and different temperature control marks, and the pressing rules are distributed more reasonably.
Based on the same inventive concept as the above-described method for assigning a medium plate pressing protocol, the present embodiment further provides an electronic device including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements the steps of any one of the above-described methods for assigning a medium plate pressing protocol when executing the program.
Where a bus architecture (represented by a bus), a bus may comprise any number of interconnected buses and bridges, linking together various circuits, including one or more processors, as represented by a processor, and a memory, as represented by a memory. The bus may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., as are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface between the bus and the receiver and transmitter. The receiver and the transmitter may be the same element, i.e. a transceiver, providing a unit for communicating with various other apparatus over a transmission medium. The processor is responsible for managing the bus and general processing, while the memory may be used to store data used by the processor in performing operations.
Since the electronic device described in this embodiment is an electronic device used to implement the method for distributing the pressing rules of the medium plate in this embodiment, based on the method for distributing the pressing rules of the medium plate described in this embodiment, those skilled in the art can understand the specific implementation manner of the electronic device and various modifications thereof, so how the electronic device implements the method in this embodiment of the invention will not be described in detail herein. As long as the person skilled in the art implements the electronic equipment adopted by the method for distributing the pressing regulations of the medium plate in the embodiment of the invention, the electronic equipment belongs to the scope of the invention.
Based on the same inventive concept as the above-mentioned medium plate pressing schedule distribution method, the present invention also provides a computer-readable storage medium, which when executed, implements any one of the above-mentioned medium plate pressing schedule distribution methods.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (6)
1. A method of dispensing a medium plate pressing protocol, comprising:
Constructing a rolling procedure case library, wherein the rolling procedure case library stores optimal rolling procedure data corresponding to plates with various steel grades, various blank sizes, various target steel plate size ranges and various temperature control marks;
acquiring the steel grade, the blank size, the target steel plate size and the temperature control mark of the current plate;
according to the steel grade, blank size, target steel plate size and temperature control mark of the current plate, searching out the optimal rolling rule data corresponding to the current plate from the rolling rule case library;
distributing the rolling regulations of the current plate according to the blank size of the current plate, the target steel plate size and the corresponding optimal rolling regulation data;
the optimal reduction rule data comprises total number of passes, reduction type corresponding to each pass, recommended reduction, stage number and pass mark;
the method for distributing the rolling schedule of the current plate according to the blank size of the current plate, the target steel plate size and the corresponding optimal rolling schedule data comprises the following steps: setting the total number of passes in the optimal rolling schedule data corresponding to the current plate as the total number of rolling passes of the current plate; determining the rolling stage of the current plate and the number of the passes of each rolling stage according to the stage number and the pass mark corresponding to each pass in the optimal rolling schedule data corresponding to the current plate; determining the target thickness of each rolling stage of the current plate according to the blank size, the target steel plate size, the steel conversion thickness and the temperature control thickness of the current plate; calculating the target rolling reduction and the target outlet thickness of each pass of the current plate according to the blank size, the target thickness, the rolling reduction type and the recommended rolling reduction in the optimal rolling schedule data corresponding to the current plate; if the target outlet thickness of the last pass of the current plate meets the requirement of the target steel plate size, calculating other set values according to the target outlet thickness of each pass of the current plate;
The press type includes absolute press and press-down distribution ratio;
the method for calculating the target rolling reduction and the target outlet thickness of each pass of the current plate according to the blank size, the target thickness, the rolling reduction type and the recommended rolling reduction in the optimal rolling procedure data corresponding to the current plate comprises the following steps: if the pressing types in the optimal pressing rule data corresponding to the current plate are absolute pressing, converting the recommended pressing quantity in the optimal pressing rule data into the pressing distribution proportion of the current plate; calculating the target rolling reduction and the target outlet thickness of each pass of the current plate according to the blank size, the rolling distribution proportion and the target thickness of the current plate;
the step of calculating the target rolling reduction and the target outlet thickness of each pass of the current plate according to the blank size, the rolling distribution proportion and the target thickness of the current plate comprises the following steps: calculating the theoretical rolling reduction and the theoretical outlet thickness of each pass of the current plate according to the blank size, the rolling distribution proportion and the target thickness of the current plate; sequentially judging whether the theoretical reduction of the current pass is smaller than an absolute reduction limit value and the theoretical reduction is smaller than the reduction limit value from the beginning of the first pass to the ending of the last pass of the current plate; if yes, setting the theoretical reduction of the current pass as the target reduction of the current pass, and taking the difference of the target outlet thickness of the last pass minus the target reduction of the current pass as the target outlet thickness of the current pass; otherwise, the product of the target outlet thickness of the last pass and the reduction rate limiting value and the smaller absolute reduction rate limiting value are set as the target reduction rate of the current pass, the difference of the target outlet thickness of the last pass minus the target reduction rate of the current pass is taken as the target outlet thickness of the current pass, the difference of the theoretical reduction rate of the current pass minus the target reduction rate is calculated, and the difference is distributed to each pass after the current pass according to the reduction distribution proportion of all passes after the current pass, so that the new theoretical reduction rate of each pass after the current pass is obtained.
2. The method for distributing the pressing regulations of the medium plate according to claim 1, wherein the pressing regulations case library comprises a first table, a second table and a third table, the first table stores steel grade indexes corresponding to various steel grades, the second table stores the various steel grade indexes, various blank size ranges, various target steel plate size ranges and regulations numbers corresponding to various temperature control marks, and the third table stores optimal pressing regulations data corresponding to various regulations numbers;
the method for searching the optimal rolling schedule data corresponding to the current plate from the rolling schedule case library according to the steel grade, the blank size, the target steel plate size and the temperature control mark of the current plate comprises the following steps:
retrieving a steel grade index corresponding to the current plate from the first table according to the steel grade of the current plate;
retrieving the corresponding procedure number of the current plate from the second table according to the blank size of the current plate, the target steel plate size, the temperature control mark and the corresponding steel grade index;
and retrieving the optimal pressing rule data corresponding to the current plate from the third table according to the rule number corresponding to the current plate.
3. A medium plate pressing protocol dispensing system, comprising:
The database construction module is used for constructing a rolling procedure case library, wherein the rolling procedure case library stores optimal rolling procedure data corresponding to plates with various steel grades, various blank sizes, various target steel plate size ranges and various temperature control marks;
the data acquisition module is used for acquiring the steel grade, the blank size, the target steel plate size and the temperature control mark of the current plate;
the data retrieval module is used for retrieving the optimal rolling rule data corresponding to the current plate from the rolling rule case library according to the steel grade, the blank size, the target steel plate size and the temperature control mark of the current plate;
the rolling rule distribution module is used for distributing rolling rules of the current plate according to the blank size of the current plate, the target steel plate size and the corresponding optimal rolling rule data;
the optimal reduction rule data comprises total number of passes, reduction type corresponding to each pass, recommended reduction, stage number and pass mark;
the pressing procedure distribution module is further configured to: setting the total number of passes in the optimal rolling schedule data corresponding to the current plate as the total number of rolling passes of the current plate; determining the rolling stage of the current plate and the number of the passes of each rolling stage according to the stage number and the pass mark corresponding to each pass in the optimal rolling schedule data corresponding to the current plate; determining the target thickness of each rolling stage of the current plate according to the blank size, the target steel plate size, the steel conversion thickness and the temperature control thickness of the current plate; calculating the target rolling reduction and the target outlet thickness of each pass of the current plate according to the blank size, the target thickness, the rolling reduction type and the recommended rolling reduction in the optimal rolling schedule data corresponding to the current plate; if the target outlet thickness of the last pass of the current plate meets the requirement of the target steel plate size, calculating other set values according to the target outlet thickness of each pass of the current plate;
The press type includes absolute press and press-down distribution ratio;
the method for calculating the target rolling reduction and the target outlet thickness of each pass of the current plate according to the blank size, the target thickness, the rolling reduction type and the recommended rolling reduction in the optimal rolling procedure data corresponding to the current plate comprises the following steps: if the pressing types in the optimal pressing rule data corresponding to the current plate are absolute pressing, converting the recommended pressing quantity in the optimal pressing rule data into the pressing distribution proportion of the current plate; calculating the target rolling reduction and the target outlet thickness of each pass of the current plate according to the blank size, the rolling distribution proportion and the target thickness of the current plate;
the step of calculating the target rolling reduction and the target outlet thickness of each pass of the current plate according to the blank size, the rolling distribution proportion and the target thickness of the current plate comprises the following steps: calculating the theoretical rolling reduction and the theoretical outlet thickness of each pass of the current plate according to the blank size, the rolling distribution proportion and the target thickness of the current plate; sequentially judging whether the theoretical reduction of the current pass is smaller than an absolute reduction limit value and the theoretical reduction is smaller than the reduction limit value from the beginning of the first pass to the ending of the last pass of the current plate; if yes, setting the theoretical reduction of the current pass as the target reduction of the current pass, and taking the difference of the target outlet thickness of the last pass minus the target reduction of the current pass as the target outlet thickness of the current pass; otherwise, the product of the target outlet thickness of the last pass and the reduction rate limiting value and the smaller absolute reduction rate limiting value are set as the target reduction rate of the current pass, the difference of the target outlet thickness of the last pass minus the target reduction rate of the current pass is taken as the target outlet thickness of the current pass, the difference of the theoretical reduction rate of the current pass minus the target reduction rate is calculated, and the difference is distributed to each pass after the current pass according to the reduction distribution proportion of all passes after the current pass, so that the new theoretical reduction rate of each pass after the current pass is obtained.
4. The medium plate pressing schedule distribution system according to claim 3, wherein the pressing schedule case library comprises a first table, a second table and a third table, wherein the first table stores steel grade indexes corresponding to a plurality of steel grades, the second table stores a plurality of steel grade indexes, a plurality of blank size ranges, a plurality of target steel plate size ranges and schedule numbers corresponding to a plurality of temperature control marks, and the third table stores optimal pressing schedule data corresponding to a plurality of schedule numbers;
the data retrieval module is further configured to:
retrieving a steel grade index corresponding to the current plate from the first table according to the steel grade of the current plate;
retrieving the corresponding procedure number of the current plate from the second table according to the blank size of the current plate, the target steel plate size, the temperature control mark and the corresponding steel grade index;
and retrieving the optimal pressing rule data corresponding to the current plate from the third table according to the rule number corresponding to the current plate.
5. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements the medium plate reduction protocol allocation method of any one of claims 1-2 when the program is executed.
6. A computer-readable storage medium, wherein the computer-readable storage medium, when executed, implements the medium plate reduction protocol distribution method of any one of claims 1-2.
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