CN112222367B - Continuous casting blank cutting control system and weight self-adaptive cutting control method thereof - Google Patents
Continuous casting blank cutting control system and weight self-adaptive cutting control method thereof Download PDFInfo
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- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/163—Controlling or regulating processes or operations for cutting cast stock
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Abstract
A continuous casting blank cutting control system and a weight self-adaptive cutting control method thereof are disclosed, wherein basic characteristic data information of a casting blank is obtained through a basic automatic control machine, the obtained basic characteristic data information of the casting blank is uploaded to a process control machine, the process control machine calls a cutting calculation module to complete real-time calculation and setting of the cutting length of the casting blank, control target information is issued to the basic automatic control machine according to the calculation and the setting, and the basic automatic control machine controls an execution unit to complete cutting of the set length of the casting blank according to the received control target information. According to the continuous casting blank cutting control system and the weight self-adaptive cutting control method thereof, the continuous casting blank cutting machine capable of controlling the direction of the produced thick plate in reality can be used, and the short blank weight hit rate of a continuous casting machine is improved.
Description
Technical Field
The invention belongs to the field of automatic control of continuous casting and cutting, and particularly relates to a continuous casting blank cutting control system and a weight self-adaptive cutting control method thereof.
Background
In the design and construction of the existing continuous casting plant, a casting blank cutting control system is generally configured. The casting blank cutting control system can cooperate with a casting machine computer system (an upper computer), a casting machine PLC system, a cutting machine PLC system and corresponding control modules thereof to automatically control the cutting of the casting blank according to conditions of a casting blank command system, the direction of the casting blank and the like.
The production process flow of continuous casting is as follows: and (2) conveying the refined molten steel to a rotary table by using a ladle, then rotating the rotary table to a pouring position, injecting the molten steel into a tundish, then flowing into each crystallizer, enabling a casting to be rapidly solidified into crystals, drawing out the casting after the casting is subjected to the action of a withdrawal and straightening machine and a vibration device, and cooling and cutting the casting into steel billets. Whether the continuous casting production is normal or not affects the completion of the steel-making production task, and also affects the quality and yield of rolled stock. Generally, a continuous casting machine is designed and built according to the configuration of a post-process rolling mill, and for the production of a double-flow continuous casting machine for a heavy plate rolling mill, the cutting command system is a short billet command set (between 1.5 and 4.5 meters) of a branch casting flow by taking a furnace as a unit, and the cutting requirement of one time is that a cutting machine is required to cut (between 5.8 and 10.2 meters) according to a combined long billet (generally combined by 2 and 3 short billets). The heavy plate production line delivers a large amount of products in a fixed size, so that great attention has been paid to the weight control accuracy of a continuous casting mother blank. The slab supplied by a steel mill is cut by taking the theoretical size as a target, the influence of the difference of the slab on the weight deviation of the slab is difficult to consider, and therefore, the fluctuation of the weight deviation of the mother slab (the difference between the weighing actual performance of the slab and the target weight of the slab) has great influence on the yield index of the next process. Under the condition of intense market competition at present, in order to improve the yield and reduce the production cost, a slab weight self-adaptive cutting control model needs to be developed so as to reduce the weight deviation of a mother slab.
The invention with application number 201710455932.9 discloses a continuous casting blank cutting control system and a control method thereof, which provides an optimized cutting method of a long ruler blank compatible with two heading command specifications and in a casting machine range by utilizing data such as a thin plate hot rolling command to a long billet, a thick plate rolling mill command to a short billet, a process tracking signal of heat pouring and the like, and controls a continuous casting online cutting machine to perform online one-time cutting, thereby achieving the purposes of reducing cutting loss and supporting a scene that hot rolling and thick plates are poured to the same CAST in the heat.
The invention application with the application number of 201610105485.X discloses a method and a system for sizing a continuous casting blank, which comprises the steps of acquiring the blank drawing speed of a withdrawal and straightening machine controlled by a frequency converter in real time, judging whether a casting blank in-place signal on an original position or a limited position is received, calculating the blank drawing length of the withdrawal and straightening machine according to the blank drawing speed when the casting blank in-place signal is received, judging whether the blank drawing length reaches the casting blank sizing length, and controlling a cutter at the original position to cut the casting blank when the blank drawing length reaches the casting blank sizing length.
The invention application with the application number of 201410695364.6 discloses an interactive continuous casting billet cutting optimization control method, which comprises the following steps: after the optimized cutting starts, arranging a cutting plan in advance according to a plate blank manufacturing command; reading the definition of an optimization event, reading an optimization module for commissioning, calling a maximum value optimization cutting module and storing an optimization result if the maximum value optimization module is commissioned, calling a minimum value optimization cutting module and storing the optimization result if the minimum value optimization module is commissioned, calling a table lookup optimization cutting module and storing the optimization result if the table lookup optimization module is commissioned; and analyzing the optimization results stored by various optimization modules, selecting the optimal one as a final optimization result, generating a new cutting plan according to the optimization result if the optimization result exists, and otherwise, keeping the cutting plan arranged in advance unchanged and controlling the cutting of the plate blank.
Disclosure of Invention
In order to solve the problems, the invention provides a continuous casting blank cutting control system and a weight self-adaptive cutting control method thereof, and the technical scheme is as follows:
a continuous casting blank cutting control system acquires basic characteristic data information of a casting blank through a basic automatic control machine, uploads the acquired basic characteristic data information of the casting blank to a process control machine, the process control machine calls a cutting calculation module to complete real-time calculation and setting of the cutting length of the casting blank, and sends control target information to the basic automatic control machine according to the calculation and the setting, and the basic automatic control machine controls an execution unit to complete cutting of the set length of the casting blank according to the received control target information, and is characterized in that:
the cutting calculation module establishes real-time feedback correction and adjustment on the theoretical weight of the casting blank to be cut according to the actual weight of the cut casting blank which is cut, so that the real-time calculation and setting of the actual cutting length of the casting blank to be cut are completed;
the cutting calculation module completes real-time feedback type correction and adjustment on the theoretical weight of the casting blank to be cut through the set casting blank length weight self-adaptive calculation submodule;
a table look-up step sequence, a compensation coefficient determination step sequence and a length compensation calculation and determination step sequence are arranged in the casting blank length weight self-adaptive calculation sub-module;
setting two-stage table query composed of a short-term adaptive coefficient table and a long-term adaptive coefficient table in a table lookup step sequence;
and the table look-up step completes table look-up according to the sequence of firstly looking up the short-term adaptive coefficient table and then looking up the long-term adaptive coefficient table, and finds out the weight compensation coefficient used by the compensation coefficient determination step.
The invention discloses a continuous casting blank cutting control system, which is characterized in that:
the short-term adaptive coefficient table and the long-term adaptive coefficient table are completed by a weight adaptive calculation module developed in a process controller;
the weight self-adaptive calculation module respectively completes the generation of a short-term self-adaptive coefficient and a long-term self-adaptive coefficient through a short-term weight self-adaptive calculation model and a long-term weight self-adaptive calculation model which are set and operated in parallel.
The invention discloses a continuous casting blank cutting control system, which is characterized in that:
sample weight deviation coefficient mean value calculation units based on a sample table are arranged in the short-term weight self-adaptive calculation model and the long-term weight self-adaptive calculation model;
a casting blank weighing actual performance acquisition and operation model is also arranged in the weight self-adaptive calculation module;
the casting blank weighing actual performance acquisition and operation model is used for weighing a pre-positioned casting blank of a casting blank to be cut; and generating a weight deviation coefficient of the casting blank to be cut according to the calculation established by the actual weight of the casting blank, the theoretical weight of the casting blank and the weight compensation coefficient used when the casting blank is cut,
the weight deviation coefficient of the weighed casting blank is used as the weight deviation coefficient of the current sample casting blank and is recorded into a sample weight deviation coefficient mean value calculation unit.
The invention discloses a continuous casting blank cutting control system, which is characterized in that:
generating short-term adaptive coefficients based on the short-term weight adaptive calculation model according to the divided sample size grades and calculation bases set under each grade;
the sample size grades comprise a first grade with the sample size less than or equal to 5; a second rating for the sample size ∈ [6,8 ]; the sample size is more than or equal to a third grade of 9;
when the sample size belongs to the first grade, the short-term weight self-adaptive calculation model is not triggered to enter;
and when the sample size belongs to the second grade or the third grade, triggering the calculation basis set under the corresponding grade in the short-term self-adaptive calculation model to finish corresponding calculation.
The invention discloses a continuous casting blank cutting control system, which is characterized in that:
the conditions for starting the short-term weight self-adaptive calculation model are as follows in sequence: belonging to the casting process currently in casting; not belonging to the head billet or the tail billet;
the conditions for starting the long-term weight adaptive model are only: not to the head or tail blanks.
The invention discloses a continuous casting blank cutting control system, which is characterized in that:
the basic automation control machine comprises: the system comprises a cutting machine PLC unit, a casting machine PLC unit and a casting blank weighing machine PLC unit;
the cutting machine PLC unit and the casting machine PLC unit are used for providing necessary data information during the operation of the casting blank length weight self-adaptive calculation submodule; and is used for receiving the final length setting instruction of the process controller;
and the casting blank weighing machine PLC is used for providing necessary data information during the casting blank weighing actual performance acquisition and operation model operation in the weight self-adaptive calculation module.
The invention discloses a continuous casting blank cutting control system, which is characterized in that:
the cutting calculation module is also provided with a model calculation interval identification submodule, a calculation interval fixed-length optimal assembly operation submodule and a current to-be-cut casting blank confirmation submodule;
the casting blank length and weight self-adaptive calculation sub-module is connected behind the three sub-modules and forms a sequential operation logic association relationship with the three sub-modules.
A weight self-adaptive cutting control method for a continuous casting blank obtains basic characteristic data information of the casting blank through a basic automatic control machine, the obtained basic characteristic data information of the casting blank is uploaded to a process control machine, the process control machine calls a cutting calculation module to complete real-time calculation and setting of the cutting length of the casting blank, control target information is issued to the basic automatic control machine according to the calculation and the setting, and the basic automatic control machine controls an execution unit to complete cutting of the set length of the casting blank according to the received control target information, and is characterized in that:
the basic automation control machine comprises: the system comprises a cutting machine PLC unit, a casting machine PLC unit and a casting blank weighing machine PLC unit;
a weight self-adaptive computing module is also arranged in the process control machine,
a self-adaptive casting blank length and weight calculating sub-module is arranged on the cutting calculating module;
the weight self-adaptive calculation module receives actual weight information of a previous cut casting blank of a to-be-cut casting blank conveyed by the casting blank weighing machine PLC and corresponding casting blank identification number information, and calculates and generates a weight self-adaptive coefficient for calling of the casting blank length weight self-adaptive calculation sub-module;
the casting blank length and weight adaptive calculation sub-module calculates and generates a final weight compensation coefficient of the casting blank to be cut according to the weight adaptive coefficient and calculates and generates a final length setting of the casting blank to be cut;
the cutting calculation module completes the length logic control step sequence setting of the to-be-cut casting blank which is convenient for the mutual communication of the process controller, the casting machine PLC unit and the cutting machine PLC unit according to the final length setting of the to-be-cut casting blank;
and the process control machine sends the final length setting of the casting blank to be cut to the cutting machine PLC unit and the casting machine PLC unit.
The weight self-adaptive cutting control method of the continuous casting blank is characterized by comprising the following steps:
setting two short-term weight self-adaptive calculation models and long-term weight self-adaptive calculation models which are operated in parallel in a weight self-adaptive calculation module, and respectively finishing the generation of a short-term self-adaptive coefficient and a long-term self-adaptive coefficient;
the short-term adaptive coefficient forms a short-term adaptive coefficient table which can be called by the casting blank length weight adaptive calculation submodule;
the long-term adaptive coefficient forms a long-term adaptive coefficient table which can be called by the casting blank length and weight adaptive calculation submodule;
the casting blank length weight adaptive calculation submodule calculates and generates a final weight compensation coefficient of the casting blank to be cut according to the weight adaptive coefficient and calculates and generates a final length setting of the casting blank to be cut, and the method specifically comprises the following steps:
s1: initializing a casting blank weight compensation coefficient;
s2: reading a short-term adaptive coefficient table;
s3: judging the existence and the effectiveness of the short-term adaptive coefficient, if the short-term adaptive coefficient exists and is effective, performing weight compensation coefficient assignment operation according to the search result of the short-term adaptive coefficient table, and then entering the step S6; otherwise, go to step S4;
s4: reading a long-term adaptive coefficient table;
s5: judging the existence and the effectiveness of the long-term adaptive coefficient, if the long-term adaptive coefficient exists and is effective, performing weight compensation coefficient assignment operation according to the lookup result of the long-term adaptive coefficient table, and then entering the step S6; otherwise, directly entering step S6;
s6: finishing the determination operation of the final weight compensation coefficient of the casting blank according to the assignment operation;
s7: and finishing the final set length calculation of the casting blank length according to the result generated by the determination calculation.
The weight self-adaptive cutting control method of the continuous casting blank is characterized by comprising the following steps:
sample weight deviation coefficient mean value calculation units based on a sample table are arranged in the short-term weight self-adaptive calculation model and the long-term weight self-adaptive calculation model;
a casting blank weighing actual performance acquisition and operation model is also arranged in the weight self-adaptive calculation module;
the casting blank weighing actual performance acquisition and operation model is used for weighing a pre-positioned casting blank of a casting blank to be cut; and generating a weight deviation coefficient of the weighed casting blank according to the calculation established by the actual weight of the casting blank, the theoretical weight of the casting blank and the weight compensation coefficient used when the casting blank is cut,
the weight deviation coefficient of the weighed casting blank is used as the weight deviation coefficient of the current sample casting blank and is recorded into a sample weight deviation coefficient mean value calculation unit.
The weight self-adaptive cutting control method of the continuous casting blank is characterized by comprising the following steps:
the short-term weight self-adaptive calculation model judges whether the current weighed casting blank is brought into a short-term weight calculation sample table according to the attribute of the current weighed casting blank, and calculates a short-term weight compensation coefficient of the current flow to which the weighed casting blank belongs according to the sample amount, and specifically comprises the following steps:
SA 1: judging whether the weighed casting blank belongs to the continuous casting times currently in casting; if yes, continuing, otherwise, ending the operation;
SA 2: judging whether the position code of the weighed casting blank belongs to B/T, if so, finishing the operation, otherwise, continuing the operation;
SA 3: judging whether the weight deviation coefficient of the weighed casting blank is within a set range, if so, continuing, otherwise, ending the operation;
SA 4: inserting the weighed casting blank data into a short-term sample table;
SA 5: calculating the mean value of the weight deviation coefficients of the current flow sample;
SA 6: calculating a weight compensation coefficient according to the sample amount;
b in SA2 above; t refers to the tail stock.
The weight self-adaptive cutting control method of the continuous casting blank is characterized by comprising the following steps:
the long-term weight self-adaptive calculation model judges whether the current weighed casting blank is brought into a long-term weight calculation sample table or not according to the attribute of the current weighed casting blank, and calculates a long-term weight compensation coefficient of a sample group to which the current weighed casting blank belongs according to the sample group of the casting blank, and specifically comprises the following steps:
SS 1: judging whether the position code of the weighed casting blank belongs to B/T, if so, finishing the operation, otherwise, continuing the operation;
SS 2: judging whether the weight deviation coefficient of the weighed casting blank is within a set range, if so, continuing, otherwise, ending the operation;
SS 3: inserting the weighed casting blank data into a long-term sample table;
SS 4: calculating the mean value of the weight deviation coefficients of the current sample group;
SS 5: calculating a weight compensation coefficient of the current sample group;
the above-mentioned B finger preform in SS 1; t refers to the tail stock.
The weight self-adaptive cutting control method of the continuous casting blank is characterized by comprising the following steps:
a model calculation interval identification submodule, a calculation interval fixed-length optimal assembly operation submodule, a current to-be-cut casting blank confirmation submodule, a casting blank length and weight self-adaptive calculation submodule and a length logic control step setting submodule of the to-be-cut casting blank are arranged on the cutting calculation module;
when the cutting of the previous casting blank starts, the cutting machine PLC unit collects cutting actual performance information and sends the collected data to the casting machine PLC unit; the casting machine PLC unit sends the information of the process control machine collected by the system and the received cutting actual performance information collected by the cutting machine PLC unit to the process control machine, and a cutting calculation module of the process control machine receives a cutting start signal of a previous block and then carries out calculation according to the following steps:
SQ 1: aiming at a casting length region corresponding to a large ladle of molten steel from a lower cutting point of the casting machine to an upper portion of the casting machine, dividing a calculation region according to the heat attribution is completed through a model calculation region identification submodule, and basic data are collected for cutting calculation;
SQ 2: aiming at the possible short billets in the calculation interval, the fixed-length billet assembly processing operation of the long billet established according to the optimal billet assembly strategy is completed through the calculation interval fixed-length optimal billet assembly operation submodule,
SQ 3: in the calculation interval, the current to-be-cut casting blank confirmation submodule passes through: taking out a calculation result of the first long billet close to the position of the continuous casting machine cutting machine, and taking the calculation result as the operation of the current casting blank to be cut to finish the confirmation of the current casting blank to be cut;
SQ 4: according to the belonged characteristics of the current casting blank to be cut, the length compensation calculation processing of the casting blank is completed through the casting blank length weight self-adaptive calculation submodule;
SQ 5: according to the length compensation result of the casting blank, the length logic control step setting submodule of the to-be-cut casting blank completes the length setting of the current to-be-cut casting blank through the following operations: when each block is cut, the process controller sets the length of the next long billet casting blank to be cut to the casting machine PLC unit; when each block is cut, the casting machine PLC unit sets the length of the next casting blank to be cut to the cutting machine PLC unit; thereby establishing a logic step sequence of mutual communication of the process control machine, the casting machine PLC unit and the cutting machine PLC unit.
The weight self-adaptive cutting control method of the continuous casting blank is characterized by comprising the following steps:
calculating a short-term weight compensation coefficient of the current flow to which the casting blank to be cut belongs according to the sample amount, wherein the short-term weight compensation coefficient specifically comprises the following steps:
generating short-term adaptive coefficients based on the short-term weight adaptive calculation model according to the divided sample size grades and calculation bases set under each grade;
the sample size grades comprise a first grade with the sample size less than or equal to 5; a second rating for the sample size ∈ [6,8 ]; the sample size is more than or equal to a third grade of 9;
when the sample size belongs to the first grade, the short-term weight self-adaptive calculation model is not triggered to enter;
and when the sample size belongs to the second grade or the third grade, triggering the calculation basis set under the corresponding grade in the short-term self-adaptive calculation model to finish corresponding calculation.
The invention relates to a continuous casting blank cutting control system and a weight self-adaptive cutting control method thereof, which utilize the weighing actual results of a post-cutting procedure casting blank weighing system, design and add a weight self-adaptive calculation module in a continuous casting process machine system (subsystem 1, namely a process control machine), respectively calculate short-term weight self-adaptation coefficients and long-term weight self-adaptation coefficients, and effectively compensate a cutting set length by utilizing the calculation result of the weight self-adaptive calculation module to control a continuous casting online cutting machine to carry out online one-time cutting, thereby improving the short-scale weight hit rate of the post-procedure. Meanwhile, in the whole compensation control, the aim of seeking the optimal adaptation is always taken, not only short-term weight adaptation and long-term weight adaptation are established, but also grade control based on sample size is established in the short-term weight adaptation, and a long-term adaptive coefficient table is periodically updated; the continuous casting slab cutting machine for producing the direction of the thick plate in reality can improve the short slab weight hit rate of a continuous casting machine according to the continuous casting slab cutting control system and the weight self-adaptive cutting control method thereof.
Drawings
FIG. 1 is a structural diagram of a continuous casting blank cutting control system according to the present invention;
FIG. 2 is a flowchart of a weight-adaptive calculation of a length of a cast slab in a weight-adaptive cutting control method for a continuously cast slab according to the present invention;
FIG. 3 is a flowchart of short-term weight adaptive calculation in a method for controlling weight adaptive cutting of a continuously cast slab according to the present invention;
FIG. 4 is a flowchart of a long-term weight adaptive calculation in a method for controlling weight adaptive cutting of a continuously cast slab according to the present invention;
FIG. 5 is a flowchart of a cutting calculation module in a method for controlling weight adaptive cutting of a continuously cast slab according to the present invention;
fig. 6 is a schematic diagram of the overall control structure of the present invention.
Detailed Description
Next, a continuous casting blank cutting control system and a weight adaptive cutting control method according to the present invention will be described in further detail with reference to the drawings and embodiments of the specification.
As shown in fig. 1 and 6, in the continuous casting blank cutting control system, basic characteristic data information of a casting blank is acquired by a basic automatic control machine, and the acquired basic characteristic data information of the casting blank is uploaded to a process control machine, the process control machine invokes a cutting calculation module to complete real-time calculation and setting of the cutting length of the casting blank, and issues control target information to the basic automatic control machine according to the calculation and the setting, the basic automatic control machine controls an execution unit to complete the cutting of the set length of the casting blank according to the received control target information,
the cutting calculation module establishes real-time feedback type correction and adjustment on the theoretical weight of the casting blank to be cut according to the actual weight of the cut casting blank which is cut, so that the real-time calculation and setting of the actual cutting length of the casting blank to be cut are completed.
The cutting calculation module completes real-time feedback type correction and adjustment on the theoretical weight of the casting blank to be cut through the set casting blank length weight self-adaptive calculation submodule;
a table look-up step sequence, a compensation coefficient determination step sequence and a length compensation calculation and determination step sequence are arranged in the casting blank length weight self-adaptive calculation sub-module;
setting two-stage table query composed of a short-term adaptive coefficient table and a long-term adaptive coefficient table in a table lookup step sequence;
and the table look-up step completes table look-up according to the sequence of firstly looking up the short-term adaptive coefficient table and then looking up the long-term adaptive coefficient table, and finds out the weight compensation coefficient used by the compensation coefficient determination step.
Wherein, the short-term adaptive coefficient table and the long-term adaptive coefficient table are completed by a weight adaptive calculation module developed in a process controller;
the weight self-adaptive calculation module respectively completes the generation of a short-term self-adaptive coefficient and a long-term self-adaptive coefficient through a short-term weight self-adaptive calculation model and a long-term weight self-adaptive calculation model which are set and operated in parallel.
Sample weight deviation coefficient mean value calculation units based on a sample table are arranged in the short-term weight self-adaptive calculation model and the long-term weight self-adaptive calculation model;
a casting blank weighing actual performance acquisition and operation model is also arranged in the weight self-adaptive calculation module;
the casting blank weighing actual performance acquisition and operation model is used for weighing a pre-positioned casting blank of a casting blank to be cut; and generating a weight deviation coefficient of the weighed casting blank according to the calculation established by the actual weight of the casting blank, the theoretical weight of the casting blank and the weight compensation coefficient used when the casting blank is cut,
the weight deviation coefficient of the weighed casting blank is used as the weight deviation coefficient of the current sample casting blank and is recorded into a sample weight deviation coefficient mean value calculation unit.
The short-term adaptive coefficient completed based on the short-term weight adaptive calculation model is generated according to the divided sample size grades and the calculation basis set under each grade;
the sample size grades comprise a first grade with the sample size less than or equal to 5; a second rating for the sample size ∈ [6,8 ]; the sample size is more than or equal to a third grade of 9;
when the sample size belongs to the first grade, the short-term weight self-adaptive calculation model is not triggered to enter;
and when the sample size belongs to the second grade or the third grade, triggering the calculation basis set under the corresponding grade in the short-term self-adaptive calculation model to finish corresponding calculation.
Wherein,
the conditions for starting the short-term weight self-adaptive calculation model are as follows in sequence: belonging to the casting process currently in casting; not belonging to the head billet or the tail billet;
the conditions for starting the long-term weight adaptive model are only: not to the head or tail blanks.
Wherein, basic automated control machine includes: the system comprises a cutting machine PLC unit, a casting machine PLC unit and a casting blank weighing machine PLC unit;
the cutting machine PLC unit and the casting machine PLC unit are used for providing necessary data information during the operation of the casting blank length weight self-adaptive calculation submodule; and is used for receiving the final length setting instruction of the process controller;
and the casting blank weighing machine PLC is used for providing necessary data information during the casting blank weighing actual performance acquisition and operation model operation in the weight self-adaptive calculation module.
Wherein,
the cutting calculation module is also provided with a model calculation interval identification submodule, a calculation interval fixed-length optimal assembly operation submodule and a current to-be-cut casting blank confirmation submodule;
the casting blank length and weight self-adaptive calculation sub-module is connected behind the three sub-modules and forms a sequential operation logic association relationship with the three sub-modules.
As shown in fig. 6, a method for controlling weight adaptive cutting of a continuous casting slab includes acquiring basic characteristic data information of a casting slab through a basic automation control machine, uploading the acquired basic characteristic data information of the casting slab to a process control machine, calling a cutting calculation module by the process control machine to complete real-time calculation and setting of a cutting length of the casting slab, issuing control target information to the basic automation control machine according to the calculation and the setting, controlling an execution unit to complete cutting of the set length of the casting slab by the basic automation control machine according to the received control target information,
the basic automation control machine comprises: the system comprises a cutting machine PLC unit, a casting machine PLC unit and a casting blank weighing machine PLC unit;
a weight self-adaptive computing module is also arranged in the process control machine,
a self-adaptive casting blank length and weight calculating sub-module is arranged on the cutting calculating module;
the weight self-adaptive calculation module receives actual weight information of a pre-cut casting blank of a to-be-cut casting blank conveyed by the casting blank weighing machine PLC and corresponding casting blank identification number information, and calculates and generates a weight self-adaptive coefficient for calling by the casting blank length weight self-adaptive calculation sub-module;
the casting blank length and weight adaptive calculation sub-module calculates and generates a final weight compensation coefficient of the casting blank to be cut according to the weight adaptive coefficient and calculates and generates a final length setting of the casting blank to be cut;
the cutting calculation module completes the length logic control step sequence setting of the to-be-cut casting blank which is convenient for the mutual communication of the process controller, the casting machine PLC unit and the cutting machine PLC unit according to the final length setting of the to-be-cut casting blank;
and the process control machine sends the final length setting of the casting blank to be cut to the cutting machine PLC unit and the casting machine PLC unit.
Wherein,
setting two short-term weight self-adaptive calculation models and long-term weight self-adaptive calculation models which are operated in parallel in a weight self-adaptive calculation module, and respectively finishing the generation of a short-term self-adaptive coefficient and a long-term self-adaptive coefficient;
the short-term adaptive coefficient forms a short-term adaptive coefficient table which can be called by the casting blank length weight adaptive calculation submodule;
the long-term adaptive coefficient forms a long-term adaptive coefficient table which can be called by the casting blank length and weight adaptive calculation submodule;
the casting blank length weight adaptive calculation submodule calculates and generates a final weight compensation coefficient of the casting blank to be cut according to the weight adaptive coefficient and calculates and generates a final length setting of the casting blank to be cut, and the method specifically comprises the following steps (as shown in fig. 2):
s1: initializing a casting blank weight compensation coefficient;
s2: reading a short-term adaptive coefficient table;
s3: judging the existence and the effectiveness of the short-term adaptive coefficient, if the short-term adaptive coefficient exists and is effective, performing weight compensation coefficient assignment operation according to the search result of the short-term adaptive coefficient table, and then entering the step S6; otherwise, go to step S4;
s4: reading a long-term adaptive coefficient table;
s5: judging the existence and the effectiveness of the long-term adaptive coefficient, if the long-term adaptive coefficient exists and is effective, performing weight compensation coefficient assignment operation according to the lookup result of the long-term adaptive coefficient table, and then entering the step S6; otherwise, directly entering step S6;
s6: finishing the determination operation of the final weight compensation coefficient of the casting blank according to the assignment operation;
s7: and finishing the final set length calculation of the casting blank length according to the result generated by the determination calculation.
Wherein,
sample weight deviation coefficient mean value calculation units based on a sample table are arranged in the short-term weight self-adaptive calculation model and the long-term weight self-adaptive calculation model;
a casting blank weighing actual performance acquisition and operation model is also arranged in the weight self-adaptive calculation module;
the casting blank weighing actual performance acquisition and operation model is used for weighing a pre-positioned casting blank of a casting blank to be cut; and generating a weight deviation coefficient of the casting blank to be cut according to the calculation established by the actual weight of the casting blank, the theoretical weight of the casting blank and the weight compensation coefficient used when the casting blank is cut,
and the weight deviation coefficient of the casting blank to be cut is taken as the weight deviation coefficient of the current sample casting blank and is recorded into a sample weight deviation coefficient mean value calculation unit.
The short-term weight adaptive calculation model judges whether the current weighed casting blank is brought into a short-term weight calculation sample table according to the attribute of the current weighed casting blank, and calculates a short-term weight compensation coefficient of a flow to which the current weighed casting blank belongs according to the sample amount, and specifically comprises the following steps (as shown in fig. 3):
SA 1: judging whether the weighed casting blank belongs to the continuous casting times currently in casting; if yes, continuing, otherwise, ending the operation;
SA 2: judging whether the position code of the weighed casting blank belongs to B/T, if so, finishing the operation, otherwise, continuing the operation;
SA 3: judging whether the weight deviation coefficient of the weighed casting blank is within a set range, if so, continuing, otherwise, ending the operation;
SA 4: inserting the weighed casting blank data into a short-term sample table;
SA 5: calculating the mean value of the weight deviation coefficients of the current flow sample;
SA 6: calculating a weight compensation coefficient according to the sample amount;
b in SA2 above; t refers to the tail stock.
Wherein,
the long-term weight adaptive calculation model judges whether the current weighed casting blank is brought into a long-term weight calculation sample table according to the attribute of the current weighed casting blank, and calculates a long-term weight compensation coefficient of a sample group to which the current weighed casting blank belongs according to the sample group of the casting blank, and specifically comprises the following steps (as shown in fig. 4):
SS 1: judging whether the position code of the weighed casting blank belongs to B/T, if so, finishing the operation, otherwise, continuing the operation;
SS 2: judging whether the weight deviation coefficient of the weighed casting blank is within a set range, if so, continuing, otherwise, ending the operation;
SS 3: inserting the weighed casting blank data into a long-term sample table;
SS 4: calculating the mean value of the weight deviation coefficients of the current sample group;
SS 5: calculating a weight compensation coefficient of the current sample group;
the above-mentioned B finger preform in SS 1; t refers to the tail stock.
Wherein,
a model calculation interval identification submodule, a calculation interval fixed-length optimal assembly operation submodule, a current to-be-cut casting blank confirmation submodule, a casting blank length and weight self-adaptive calculation submodule and a length logic control step setting submodule of the to-be-cut casting blank are arranged on the cutting calculation module;
when the cutting of the previous casting blank starts, the cutting machine PLC unit collects cutting actual performance information and sends the collected data to the casting machine PLC unit; the casting machine PLC unit sends the information of the process control machine collected by the system and the received cutting actual performance information collected by the cutting machine PLC unit to the process control machine, and a cutting calculation module of the process control machine receives a cutting start signal of a previous block and then performs calculation according to the following steps (as shown in figure 5):
SQ 1: aiming at a casting length region corresponding to a large ladle of molten steel from a lower cutting point of the casting machine to an upper portion of the casting machine, dividing a calculation region according to the heat attribution is completed through a model calculation region identification submodule, and basic data are collected for cutting calculation;
SQ 2: aiming at the possible short billets in the calculation interval, the fixed-length billet assembly processing operation of the long billet established according to the optimal billet assembly strategy is completed through the calculation interval fixed-length optimal billet assembly operation submodule,
SQ 3: in the calculation interval, the current to-be-cut casting blank confirmation submodule passes through: taking out a calculation result of the first long billet close to the position of the continuous casting machine cutting machine, and taking the calculation result as the operation of the current casting blank to be cut to finish the confirmation of the current casting blank to be cut;
SQ 4: according to the belonged characteristics of the current casting blank to be cut, the length compensation calculation processing of the casting blank is completed through the casting blank length weight self-adaptive calculation submodule;
SQ 5: according to the length compensation result of the casting blank, the length logic control step setting submodule of the to-be-cut casting blank completes the length setting of the current to-be-cut casting blank through the following operations: when each block is cut, the process controller sets the length of the next long billet casting blank to be cut to the casting machine PLC unit; when each block is cut, the casting machine PLC unit sets the length of the next casting blank to be cut to the cutting machine PLC unit; thereby establishing a logic step sequence of mutual communication of the process control machine, the casting machine PLC unit and the cutting machine PLC unit.
Wherein,
calculating a short-term weight compensation coefficient of the current flow to which the casting blank to be cut belongs according to the sample amount, wherein the short-term weight compensation coefficient specifically comprises the following steps:
generating short-term adaptive coefficients based on the short-term weight adaptive calculation model according to the divided sample size grades and calculation bases set under each grade;
the sample size grades comprise a first grade with the sample size less than or equal to 5; a second rating for the sample size ∈ [6,8 ]; the sample size is more than or equal to a third grade of 9;
when the sample size belongs to the first grade, the short-term weight self-adaptive calculation model is not triggered to enter;
and when the sample size belongs to the second grade or the third grade, triggering the calculation basis set under the corresponding grade in the short-term self-adaptive calculation model to finish corresponding calculation.
Principle of operation
The invention comprises the following steps: 4 sets of subsystem such as a casting machine computer system (an upper computer, namely a process control machine) (subsystem 1), a casting machine PLC system (subsystem 2), a cutting machine PLC system (subsystem 3), a casting blank weighing machine PLC (subsystem 4) and the like are configured, and two modules such as a cutting calculation setting module, a weight self-adaptive calculation module and the like are configured in the casting machine computer system (the upper computer) (subsystem 1). The casting blank weighing machine PLC (subsystem 4) is responsible for collecting casting blank weighing actual results and sending the actual results to a casting machine computer system (upper computer) (subsystem 1); the weight self-adaptive calculation module of the casting machine computer system (upper computer) (subsystem 1) sequentially performs the following steps according to the collected casting blank weight: (1) a casting blank weighing actual performance acquisition method; (2) a short-term weight adaptive calculation method; (3) a long-term weight adaptive calculation method; (4) a weight adaptive coefficient storage method, and the like; when the cutting of the previous casting blank starts, a cutting machine PLC system (subsystem 3) collects cutting actual performance information and sends collected data to a casting machine PLC system (subsystem 2); the casting machine PLC system (subsystem 2) sends the casting machine process machine information collected by the system, including the cutting actual performance information collected by the cutting machine PLC system (subsystem 3), to the casting machine computer system (upper computer) (subsystem 1); after receiving a cutting start signal of a previous block, a cutting calculation setting module of a casting machine computer system (upper computer) (subsystem 1) sequentially performs (5) a model calculation interval identification method, (6) a calculation interval fixed-length optimal blank assembly method, (7) a current to-be-cut casting blank confirmation method, (8) a casting blank length weight self-adaptive calculation method, and (9) a current to-be-cut casting blank length setting method; the calculated length of the current casting blank to be cut is sent to a cutting machine PLC system (subsystem 3) through a casting machine PLC system (subsystem 2), and then the on-line control of the primary cutting of the casting blank is carried out; as shown in fig. 6.
This cutting control system includes: the system comprises 4 sets of sub-systems such as a casting machine computer system (upper computer) (subsystem 1), a casting machine PLC system (subsystem 2), a cutting machine PLC system (subsystem 3), a casting blank weighing machine PLC (subsystem 4) and the like, wherein the casting machine computer system (upper computer) (subsystem 1) comprises two modules such as a cutting calculation setting module, a weight self-adaptive calculation module and the like.
The working principle and the process of the invention are as follows:
the text meanings appear herein below:
CAST, continuous casting and pouring.
B/T, casting blank position code marks (B indicates a head blank, and T indicates a tail blank).
Subsystem 1-weight adaptive computing module processing flow: the casting blank weighing machine PLC (subsystem 4) is responsible for collecting casting blank weighing actual results and sending the actual results to a casting machine computer system (upper computer) (subsystem 1). The module has the following specific processing flow:
(1) casting blank weighing actual performance acquisition method
Extracting the relevant data of the casting blank from a cutting actual performance data table according to the casting blank number, and calculating the weight deviation coefficient of the casting blank:
wherein: α: coefficient of deviation of casting blank weight
C1: weight compensation coefficient used in cutting of weighed casting blank
WA: casting blank weight (unit: kilogram)
WT: casting blank theoretical weight (unit: kilogram)
The theoretical weight calculation formula of the casting blank is as follows:
WT＝S*T*L*P (2)
wherein:
WT: casting blank theoretical weight (unit: kilogram)
S: casting blank width (unit: meter)
T: casting blank thickness (unit: meter)
L: casting blank length (unit: meter)
P: casting blank specific gravity (unit: kg/m)3)
(2) Short-term weight self-adaptive calculation method
And judging whether the current casting blank is brought into a short-term weight calculation sample table or not according to the current casting blank attribute, and calculating a short-term weight compensation coefficient of the current casting blank according to the sample amount, wherein the specific steps are as follows (see fig. 3).
Judging whether the casting blank belongs to the CAST CAST at present, otherwise jumping to the finishing step;
judging whether the position code of the casting blank does not belong to B/T, otherwise jumping to an end step;
judging whether the weight deviation coefficient of the casting blank is within the range, wherein the range is shown in a formula (3), otherwise, jumping to an ending step;
-1.5％≤α≤3.0％ (3)
wherein: α: coefficient of deviation of casting blank weight
And fourthly, inserting the casting blank data into a short-term sample table, wherein the short-term sample table only keeps the casting blank data record of the current CAST.
Fifthly, calculating the mean value of the weight deviation coefficient of the current flow sample, and the calculation method is shown in a formula (4)
Wherein: alpha is alphaA: mean value of sample casting blank weight deviation coefficient
αi: casting blank weight deviation coefficient of each sample
n: number of samples
Sixthly, calculating the weight compensation coefficient according to the sample amount.
When the sample size is less than 5: the self-adaptive coefficient of the weight of the short billet is not calculated, and the system carries out compensation calculation according to the coefficient in the long-term self-adaptive calculation method.
When 6 ═ sample size ≦ 8, the calculation formula is as follows:
wherein: alpha is alphaA: mean value of sample casting blank weight deviation coefficient
G: weight compensation target value of steel grade to which casting blank belongs
C: coefficient of weight compensation
When 9< sample size, the calculation formula is as follows:
wherein: alpha is alphaA: mean value of sample casting blank weight deviation coefficient
G: weight compensation target value of steel grade to which casting blank belongs
C: coefficient of weight compensation
(3) Long-term weight self-adaptive calculation method
Judging whether the current casting blank is brought into a long-term weight calculation sample table or not according to the attribute of the current casting blank, and calculating a long-term weight compensation coefficient of a sample group to which the current casting blank belongs according to the sample group to which the casting blank belongs (determined by steel type, flow number, thickness specification, width specification and the like), wherein the method comprises the following specific steps of:
judging whether the position code of the casting blank does not belong to B/T, otherwise jumping to an end step;
judging whether the weight deviation coefficient of the casting blank is in a range, wherein the range is shown in a formula (7), otherwise, jumping to an ending step;
-1.5％≤α≤3.0％ (7)
wherein: α: coefficient of deviation of casting blank weight
Inserting the casting blank data into a long-term sample group table, wherein the sample group of the long-term table is determined according to steel type, flow number, thickness specification, width specification and the like, and each group keeps 100 latest records.
Fourthly, calculating the mean value of the weight deviation coefficients of the current sample group,
wherein: alpha is alphaA: mean value of sample group casting blank weight deviation coefficient
αi: casting blank weight deviation coefficient of each sample
n number of samples (100)
Calculating the weight compensation coefficient of the current sample group.
The calculation formula is as follows:
wherein: alpha is alphaA: mean value of sample group casting blank weight deviation coefficient
G: weight compensation target value of steel grade to which casting blank belongs
C: coefficient of weight compensation
(4) Weight adaptive coefficient storage method
And respectively storing the calculation results in a short-term adaptive compensation coefficient table and a long-term adaptive compensation coefficient table according to the calculation results of the short-term adaptive compensation coefficient and the long-term adaptive compensation coefficient, so that the cutting calculation module can read and effectively compensate the weight.
Subsystem 1-cut calculation module process flow: when the cutting of the previous casting blank starts, a cutting machine PLC system (subsystem 3) collects cutting actual performance information and sends collected data to a casting machine PLC system (subsystem 2); the casting machine PLC system (subsystem 2) sends the casting machine process machine information collected by the system, including the cutting actual performance information collected by the cutting machine PLC system (subsystem 3), to the casting machine computer system (upper computer) (subsystem 1); after receiving a cutting start signal of a previous block, a cutting calculation setting module of a casting machine computer system (upper computer) (subsystem 1) sequentially carries out the following steps:
(5) model calculation interval recognition method
The method mainly has the functions of collecting basic data for cutting calculation, and dividing a casting length part corresponding to a ladle molten steel from a cutting point at the lower part of a casting machine to the upper part of the casting machine into 3 furnace calculation intervals (BStart, BEnd) according to the furnace attribution;
(6) method for calculating interval fixed-length optimal assembly
The method has the main function of carrying out fixed-length assembly processing on the long billet according to the optimal assembly strategy aiming at the possible short billet in the calculation interval.
(7) Method for confirming current to-be-cut casting blank
And in the calculation interval, taking out the calculation result of the first long billet close to the position of the continuous casting machine cutting machine as the current to-be-cut casting billet.
(8) Self-adaptive calculating method for length and weight of casting blank
Respectively reading a short-term adaptive coefficient table and a long-term adaptive coefficient table according to the belonged characteristics of the current to-be-cut casting blank, and performing compensation calculation processing on the length of the casting blank, wherein the specific steps are as follows (see figure 2):
initializing a casting blank weight compensation coefficient;
C＝-1.0 (10)
wherein: c: coefficient of weight compensation
Reading a short-term adaptive coefficient table;
according to the CAST number and the stream number currently being CAST, reading a corresponding weight compensation coefficient C from a short-term adaptive coefficient tableShort length。
Third, judging existence and validity of short-term adaptive coefficient
If the short term weight compensation factor CShort lengthExist and have upper and lower limits of [ -0.05, +0.05 [)]And assigning according to a formula (11), and then jumping to the sixth step, otherwise, performing the fourth step.
C＝CShort length (11)
Wherein: c: coefficient of weight compensation
CShort length: short term weight compensation factor
Read the long-term adaptive coefficient table
According to the steel grade, the flow number, the thickness specification, the width specification and the like of the current casting blank to be cut, reading a corresponding weight compensation coefficient C from a long-term adaptive coefficient tableLong and long。
Judging existence and effectiveness of long-term adaptive coefficient
If long term weight compensation coefficient CLong and longExist and have upper and lower limits of [ -0.05, +0.05 [)]And assigning values according to the formula (12) and then jumping to the sixth step, otherwise, jumping to the sixth step.
C＝CLong and long (12)
Wherein: c: coefficient of weight compensation
CLong and long: long term weight compensation factor
Sixthly, determining the weight compensation coefficient of the casting blank according to the formula (13).
And seventhly, calculating the final set length of the casting blank, and determining the final calculated length of the casting blank according to a formula (14).
LSupplement device＝LOriginal source*(1+C) (14)
Wherein: c: coefficient of weight compensation
LSupplement device: compensated casting blank length (unit: mm)
LOriginal source: casting blank length before compensation (unit: mm)
(9) Method for setting length of current to-be-cut casting blank
And setting a calculation result. When each block is cut, the continuous casting process machine system (subsystem 1) sets the length of the long billet to be cut next to the basic automatic casting machine PLC system (subsystem 2); at the end of each piece of cutting, the basic automatic casting machine PLC system sets the length of the next piece of casting blank to be cut to the cutting machine PLC (subsystem 3).
Compared with the prior art, the invention has the main characteristics that: by utilizing the weighing actual results of the casting blank weighing system in the post-cutting process, a weight self-adaptive calculation module is additionally designed in a continuous casting process machine system (subsystem 1) to respectively calculate short-term weight self-adaptation coefficients and long-term weight self-adaptation coefficients, a cutting calculation setting module utilizes the calculation result of the weight self-adaptive calculation module to effectively compensate the cutting set length to control a continuous casting online cutting machine to carry out online one-time cutting, so that the short-scale weight hit rate of the post-cutting process is improved. After the technology is utilized, the hit rate of the Zhanjiang 4# continuous casting machine slab weighing target weight tolerance < 1% is improved from 43.7% to 65%. After the method is used, the comprehensive yield of a continuous casting post-process thick plate factory is effectively improved, a leading plate blank cutting control precision technology in the industry is formed, and the aim of lean operation is achieved. The technical scheme of the invention is reformed and implemented in Zhanjiang engineering No. 4 continuous casting machine in Baogang province, after the invention is used, the hit rate of Zhanjiang No. 4 continuous casting machine slab weighing target weight tolerance < 1% is improved from 43.7% to 65%, the comprehensive yield of a thick plate factory in the process after continuous casting is effectively improved, the leading slab cutting control precision technology in the industry is formed, and the aim of lean operation is achieved.
Examples
Example 1: short term weight adaptive calculation embodiments
(1) The following weight deviation coefficients of 6 cast pieces were calculated according to the formula (1), respectively.
(2) After judging that the calculated weight deviation coefficients are all in the specified range, the formula (4) is utilized to calculate the mean value of the weight deviation coefficients of the current flow sample, alphaA＝0.009580237
(3) Using equation (5), the weight compensation factor is calculated:
C＝G-αA＝0.004-0.0096＝-0.0056
(4) determining a casting blank weight compensation coefficient by using the formula (13):
C＝-0.0056
(5) calculating the final length of the casting blank according to a formula (14);
Lsupplement device＝LOriginal source*(1+C)＝9328*(1+-0.0056)＝9276
Example 2: long term weight adaptive calculation embodiments
(1) The weight deviation coefficients of 100 casting blanks of a steel grade group 1, a stream number 7, a thickness 230 and a width 1700 sample group which are respectively calculated according to the formula (1) are calculated by using a formula (8) to obtain the average value alphaA0.0015. (process simplification)
(2) Using equation (9), the weight compensation factor is calculated:
C＝(G-αA)*0.7＝(0.004-0.0015)*0.7＝0.00175
(3) determining a casting blank weight compensation coefficient by using the formula (13):
C＝0.00175
(4) calculating the final length of the casting blank according to a formula (14);
Lsupplement device＝LOriginal source*(1+C)＝9328*(1+0.00175)＝9344
The invention relates to a continuous casting blank cutting control system and a weight self-adaptive cutting control method thereof, which utilize the weighing actual results of a post-cutting procedure casting blank weighing system, design and add a weight self-adaptive calculation module in a continuous casting process machine system (subsystem 1, namely a process control machine), respectively calculate short-term weight self-adaptation coefficients and long-term weight self-adaptation coefficients, and effectively compensate a cutting set length by utilizing the calculation result of the weight self-adaptive calculation module to control a continuous casting online cutting machine to carry out online one-time cutting, thereby improving the short-scale weight hit rate of the post-procedure. Meanwhile, in the whole compensation control, the aim of seeking the optimal adaptation is always taken, not only short-term weight adaptation and long-term weight adaptation are established, but also grade control based on sample size is established in the short-term weight adaptation, and a long-term adaptive coefficient table is periodically updated; the continuous casting slab cutting machine for producing the direction of the thick plate in reality can improve the short slab weight hit rate of a continuous casting machine according to the continuous casting slab cutting control system and the weight self-adaptive cutting control method thereof.
Claims (14)
1. A continuous casting blank cutting control system acquires basic characteristic data information of a casting blank through a basic automatic control machine, uploads the acquired basic characteristic data information of the casting blank to a process control machine, the process control machine calls a cutting calculation module to complete real-time calculation and setting of the cutting length of the casting blank, and sends control target information to the basic automatic control machine according to the calculation and the setting, and the basic automatic control machine controls an execution unit to complete cutting of the set length of the casting blank according to the received control target information, and is characterized in that:
the cutting calculation module establishes real-time feedback correction and adjustment on the theoretical weight of the casting blank to be cut according to the actual weight of the cut casting blank which is cut, so that the real-time calculation and setting of the actual cutting length of the casting blank to be cut are completed;
the cutting calculation module completes real-time feedback type correction and adjustment on the theoretical weight of the casting blank to be cut through the set casting blank length weight self-adaptive calculation submodule;
a table look-up step sequence, a compensation coefficient determination step sequence and a length compensation calculation and determination step sequence are arranged in the casting blank length weight self-adaptive calculation sub-module;
setting two-stage table query composed of a short-term adaptive coefficient table and a long-term adaptive coefficient table in a table lookup step sequence;
and the table look-up step completes table look-up according to the sequence of firstly looking up the short-term adaptive coefficient table and then looking up the long-term adaptive coefficient table, and finds out the weight compensation coefficient used by the compensation coefficient determination step.
2. The continuous casting strand cutting control system according to claim 1, wherein:
the short-term adaptive coefficient table and the long-term adaptive coefficient table are completed by a weight adaptive calculation module developed in a process controller;
the weight self-adaptive calculation module respectively completes the generation of a short-term self-adaptive coefficient and a long-term self-adaptive coefficient through a short-term weight self-adaptive calculation model and a long-term weight self-adaptive calculation model which are set and operated in parallel.
3. The continuous casting strand cutting control system according to claim 2, wherein:
sample weight deviation coefficient mean value calculation units based on a sample table are arranged in the short-term weight self-adaptive calculation model and the long-term weight self-adaptive calculation model;
a casting blank weighing actual performance acquisition and operation model is also arranged in the weight self-adaptive calculation module;
the casting blank weighing actual performance acquisition and operation model is used for weighing a pre-positioned casting blank of a casting blank to be cut; and generating a weight deviation coefficient of the weighed casting blank according to the calculation established by the actual weight of the casting blank, the theoretical weight of the casting blank and the weight compensation coefficient used when the casting blank is cut,
the weight deviation coefficient of the weighed casting blank is used as the weight deviation coefficient of the current sample casting blank and is recorded into a sample weight deviation coefficient mean value calculation unit.
4. The continuous casting strand cutting control system according to claim 2 or 3, wherein:
generating short-term adaptive coefficients based on the short-term weight adaptive calculation model according to the divided sample size grades and calculation bases set under each grade;
the sample size grades comprise a first grade with the sample size less than or equal to 5; a second rating for the sample size ∈ [6,8 ]; the sample size is more than or equal to a third grade of 9;
when the sample size belongs to the first grade, the short-term weight self-adaptive calculation model is not triggered to enter;
and when the sample size belongs to the second grade or the third grade, triggering the calculation basis set under the corresponding grade in the short-term self-adaptive calculation model to finish corresponding calculation.
5. The continuous casting strand cutting control system according to claim 2 or 3, wherein:
the conditions for starting the short-term weight self-adaptive calculation model are as follows in sequence: belonging to the casting process currently in casting; not belonging to the head billet or the tail billet;
the conditions for starting the long-term weight adaptive model are only: not to the head or tail blanks.
6. The continuous casting strand cutting control system according to claim 3, wherein:
the basic automation control machine comprises: the system comprises a cutting machine PLC unit, a casting machine PLC unit and a casting blank weighing machine PLC unit;
the cutting machine PLC unit and the casting machine PLC unit are used for providing necessary data information during the operation of the casting blank length weight self-adaptive calculation submodule; and is used for receiving the final length setting instruction of the process controller;
and the casting blank weighing machine PLC is used for providing necessary data information during the casting blank weighing actual performance acquisition and operation model operation in the weight self-adaptive calculation module.
7. The continuous casting strand cutting control system according to claim 1, wherein:
the cutting calculation module is also provided with a model calculation interval identification submodule, a calculation interval fixed-length optimal assembly operation submodule and a current to-be-cut casting blank confirmation submodule;
the casting blank length and weight self-adaptive calculation sub-module is connected behind the three sub-modules and forms a sequential operation logic association relationship with the three sub-modules.
8. A weight self-adaptive cutting control method for a continuous casting blank obtains basic characteristic data information of the casting blank through a basic automatic control machine, the obtained basic characteristic data information of the casting blank is uploaded to a process control machine, the process control machine calls a cutting calculation module to complete real-time calculation and setting of the cutting length of the casting blank, control target information is issued to the basic automatic control machine according to the calculation and the setting, and the basic automatic control machine controls an execution unit to complete cutting of the set length of the casting blank according to the received control target information, and is characterized in that:
the basic automation control machine comprises: the system comprises a cutting machine PLC unit, a casting machine PLC unit and a casting blank weighing machine PLC unit;
a weight self-adaptive computing module is also arranged in the process control machine,
a self-adaptive casting blank length and weight calculating sub-module is arranged on the cutting calculating module;
the weight self-adaptive calculation module receives actual weight information of a pre-cut casting blank of a to-be-cut casting blank conveyed by the casting blank weighing machine PLC and corresponding casting blank identification number information, and calculates and generates a weight self-adaptive coefficient for calling by the casting blank length weight self-adaptive calculation sub-module;
the casting blank length and weight adaptive calculation sub-module calculates and generates a final weight compensation coefficient of the casting blank to be cut according to the weight adaptive coefficient and calculates and generates a final length setting of the casting blank to be cut;
the cutting calculation module completes the length logic control step sequence setting of the to-be-cut casting blank which is convenient for the mutual communication of the process controller, the casting machine PLC unit and the cutting machine PLC unit according to the final length setting of the to-be-cut casting blank;
and the process control machine sends the final length setting of the casting blank to be cut to the cutting machine PLC unit and the casting machine PLC unit.
9. The weight adaptive cutting control method of a continuously cast slab according to claim 8, characterized in that:
setting two short-term weight self-adaptive calculation models and long-term weight self-adaptive calculation models which are operated in parallel in a weight self-adaptive calculation module, and respectively finishing the generation of a short-term self-adaptive coefficient and a long-term self-adaptive coefficient;
the short-term adaptive coefficient forms a short-term adaptive coefficient table which can be called by the casting blank length weight adaptive calculation submodule;
the long-term adaptive coefficient forms a long-term adaptive coefficient table which can be called by the casting blank length and weight adaptive calculation submodule;
the casting blank length weight adaptive calculation submodule calculates and generates a final weight compensation coefficient of the casting blank to be cut according to the weight adaptive coefficient and calculates and generates a final length setting of the casting blank to be cut, and the method specifically comprises the following steps:
s1: initializing a casting blank weight compensation coefficient;
s2: reading a short-term adaptive coefficient table;
s3: judging the existence and the effectiveness of the short-term adaptive coefficient, if the short-term adaptive coefficient exists and is effective, performing weight compensation coefficient assignment operation according to the search result of the short-term adaptive coefficient table, and then entering the step S6; otherwise, go to step S4;
s4: reading a long-term adaptive coefficient table;
s5: judging the existence and the effectiveness of the long-term adaptive coefficient, if the long-term adaptive coefficient exists and is effective, performing weight compensation coefficient assignment operation according to the lookup result of the long-term adaptive coefficient table, and then entering the step S6; otherwise, directly entering step S6;
s6: finishing the determination operation of the final weight compensation coefficient of the casting blank according to the assignment operation;
s7: and finishing the final set length calculation of the casting blank length according to the result generated by the determination calculation.
10. The weight adaptive cutting control method of a continuously cast slab according to claim 9, characterized in that:
sample weight deviation coefficient mean value calculation units based on a sample table are arranged in the short-term weight self-adaptive calculation model and the long-term weight self-adaptive calculation model;
a casting blank weighing actual performance acquisition and operation model is also arranged in the weight self-adaptive calculation module;
the casting blank weighing actual performance acquisition and operation model is used for weighing a pre-positioned casting blank of a casting blank to be cut; and generating a weight deviation coefficient of the weighed casting blank according to the calculation established by the actual weight of the casting blank, the theoretical weight of the casting blank and the weight compensation coefficient used when the casting blank is cut,
the weight deviation coefficient of the weighed casting blank is used as the weight deviation coefficient of the current sample casting blank and is recorded into a sample weight deviation coefficient mean value calculation unit.
11. The weight adaptive cutting control method of a continuously cast slab according to claim 10, characterized in that:
the short-term weight self-adaptive calculation model judges whether the current weighed casting blank is brought into a short-term weight calculation sample table according to the attribute of the current weighed casting blank, and calculates a short-term weight compensation coefficient of the current flow to which the weighed casting blank belongs according to the sample amount, and specifically comprises the following steps:
SA 1: judging whether the weighed casting blank belongs to the continuous casting times currently in casting; if yes, continuing, otherwise, ending the operation;
SA 2: judging whether the position code of the weighed casting blank belongs to B/T, if so, finishing the operation, otherwise, continuing the operation;
SA 3: judging whether the weight deviation coefficient of the weighed casting blank is within a set range, if so, continuing, otherwise, ending the operation;
SA 4: inserting the weighed casting blank data into a short-term sample table;
SA 5: calculating the mean value of the weight deviation coefficients of the current flow sample;
SA 6: calculating a weight compensation coefficient according to the sample amount;
b in SA2 above; t refers to the tail stock.
12. The weight adaptive cutting control method of a continuously cast slab according to claim 10, characterized in that:
the long-term weight self-adaptive calculation model judges whether the current weighed casting blank is brought into a long-term weight calculation sample table or not according to the attribute of the current weighed casting blank, and calculates a long-term weight compensation coefficient of a sample group to which the current weighed casting blank belongs according to the sample group of the casting blank, and specifically comprises the following steps:
SS 1: judging whether the position code of the weighed casting blank belongs to B/T, if so, finishing the operation, otherwise, continuing the operation;
SS 2: judging whether the weight deviation coefficient of the weighed casting blank is within a set range, if so, continuing, otherwise, ending the operation;
SS 3: inserting the weighed casting blank data into a long-term sample table;
SS 4: calculating the mean value of the weight deviation coefficients of the current sample group;
SS 5: calculating a weight compensation coefficient of the current sample group;
the above-mentioned B finger preform in SS 1; t refers to the tail stock.
13. The weight adaptive cutting control method of a continuously cast slab according to claim 8, characterized in that:
a model calculation interval identification submodule, a calculation interval fixed-length optimal assembly operation submodule, a current to-be-cut casting blank confirmation submodule, a casting blank length and weight self-adaptive calculation submodule and a length logic control step setting submodule of the to-be-cut casting blank are arranged on the cutting calculation module;
when the cutting of the previous casting blank starts, the cutting machine PLC unit collects cutting actual performance information and sends the collected data to the casting machine PLC unit; the casting machine PLC unit sends the information of the process control machine collected by the system and the received cutting actual performance information collected by the cutting machine PLC unit to the process control machine, and a cutting calculation module of the process control machine receives a cutting start signal of a previous block and then carries out calculation according to the following steps:
SQ 1: aiming at a casting length region corresponding to a large ladle of molten steel from a lower cutting point of the casting machine to an upper portion of the casting machine, dividing a calculation region according to the heat attribution is completed through a model calculation region identification submodule, and basic data are collected for cutting calculation;
SQ 2: aiming at the possible short billets in the calculation interval, the fixed-length billet assembly processing operation of the long billet established according to the optimal billet assembly strategy is completed through the calculation interval fixed-length optimal billet assembly operation submodule,
SQ 3: in the calculation interval, the current to-be-cut casting blank confirmation submodule passes through: taking out a calculation result of the first long billet close to the position of the continuous casting machine cutting machine, and taking the calculation result as the operation of the current casting blank to be cut to finish the confirmation of the current casting blank to be cut;
SQ 4: according to the belonged characteristics of the current casting blank to be cut, the length compensation calculation processing of the casting blank is completed through the casting blank length weight self-adaptive calculation submodule;
SQ 5: according to the length compensation result of the casting blank, the length logic control step setting submodule of the to-be-cut casting blank completes the length setting of the current to-be-cut casting blank through the following operations: when each block is cut, the process controller sets the length of the next long billet casting blank to be cut to the casting machine PLC unit; when each block is cut, the casting machine PLC unit sets the length of the next casting blank to be cut to the cutting machine PLC unit; thereby establishing a logic step sequence of mutual communication of the process control machine, the casting machine PLC unit and the cutting machine PLC unit.
14. The weight adaptive cutting control method of a continuously cast slab according to claim 11, characterized in that:
according to the sample amount, calculating a short-term weight compensation coefficient of the current flow to which the weighed casting blank belongs, specifically:
generating short-term adaptive coefficients based on the short-term weight adaptive calculation model according to the divided sample size grades and calculation bases set under each grade;
the sample size grades comprise a first grade with the sample size less than or equal to 5; a second rating for the sample size ∈ [6,8 ]; the sample size is more than or equal to a third grade of 9;
when the sample size belongs to the first grade, the short-term weight self-adaptive calculation model is not triggered to enter;
and when the sample size belongs to the second grade or the third grade, triggering the calculation basis set under the corresponding grade in the short-term self-adaptive calculation model to finish corresponding calculation.
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