Continuous casting billet waste cutting online automatic tracking system and control method thereof

Abstract

The invention discloses an on-line automatic tracking system for continuous casting billet waste cutting and a control method thereof, and belongs to the technical field of chemical metallurgy. The on-line automatic tracking system for continuous casting billet waste cutting comprises a continuous casting PLC and a control module which are in signal connection with a continuous casting machine, and the control module is in signal connection with a pouring duration acquisition module, a pulling speed detection module, a preset warehouse, an MES warehousing system module and a unit meter weight rule base. And the pouring duration acquisition module and the pulling speed detection module are in signal connection with the continuous casting machine. According to the continuous casting billet waste cutting online automatic tracking system, a fixed-length billet is randomly selected for data collection in a constant-speed pouring stage in each statistical period through the control module in combination with the pouring duration collection module and the pulling speed detection module, the stability of the continuous casting process and the initial quality of the continuous casting billet are ensured, and meanwhile the continuous casting billet waste cutting quality is improved. Preset parameters can be modified regularly according to actual parameters through spot check, and the problems that in continuous casting production, the statistical period is inaccurate, and the quality is low due to the deviation between the pulling speed and the length of a real object are solved.

Description

Technical Field

[0001] The invention relates to the technical field of chemical metallurgy, and in particular to an online automatic tracking system for waste cutting of continuous casting billets and a control method thereof. Background Art

[0002] Continuous casting machine, full name continuous steel casting machine, is a kind of equipment that directly pours liquid metal and solidifies it into shape. Its working principle is to transport the refined molten steel to the turntable through the ladle, then inject it into the tundish, and then distribute it to each crystallizer through the water outlet of the tundish. In the crystallizer, the molten steel gradually solidifies into a billet shell. After the billet shell solidifies to a certain thickness, it is pulled out by the straightening machine and further cooled in the secondary cooling zone, and finally cut into fixed-length billets by the cutting device.

[0003] At present, continuous casting machines usually use a single continuous casting PLC system for automated operation. However, when a single continuous casting PLC system works for a long time, it is inevitable that the sensor signal will be interfered with or there will be external environmental factors, resulting in errors in detection accuracy and inability to correct them in real time. In addition, for some problems arising in the continuous casting process, the traditional single continuous casting PLC system cannot automatically track the waste of continuous casting billets, resulting in some waste not being tracked and counted or being recorded by production workshop personnel. Manual records are often incomplete or untrue, resulting in product quality defects and a large amount of waste, which affects product quality and increases production costs. Summary of the invention

[0004] In view of the problems existing in the above-mentioned prior art, the present invention provides a continuous casting billet waste cutting online automatic tracking system and control method thereof, which realizes the function of regularly spot checking billets and has the technical effect of online automatic tracking of waste cutting.

[0005] In order to solve the above technical problems and achieve the above technical effects, the present invention is implemented through the following technical solutions: The technical solution of the present invention is: an online automatic tracking system for waste cutting of continuous casting billets, comprising a continuous casting PLC, a control module, a pouring time acquisition module, a pulling speed detection module, a preset library, an MES warehousing system module and a unit-meter weight rule library, wherein the control module is connected to the control device signal in the continuous casting machine, the pouring time acquisition module and the pulling speed detection module are both connected to the continuous casting machine signal, and the control module is respectively connected to the preset library, the MES warehousing system module, the unit-meter weight rule library, the pouring time acquisition module and the pulling speed detection module signal, and the control module is connected to the continuous casting PLC signal; The continuous casting PLC can monitor the equipment parameters in the continuous casting machine, the pouring time acquisition module can collect data on the pouring time in the continuous casting machine, the pulling speed detection module can collect data on the pulling speed in the continuous casting machine, the MES warehousing system module can record the steel billet warehousing and track the waste cutting, the unit meter weight rule library can calculate the weight of the steel billet, and the preset library is used to formulate the basic parameter values ​​of the continuous casting machine.

[0006] Furthermore, the preset library consists of a storage unit and an output unit, the storage unit is used to store preset values ​​of process parameters such as cut length, drawing speed and casting time of different types of steel billets, and the output unit can transmit the preset information to the continuous casting machine.

[0007] Furthermore, the MES warehousing system module is composed of a warehousing detection system and a tracking unit. The warehousing detection system is used to collect and record the weight of the blanks entering the warehousing, and the tracking unit is used to track the scrap cutting information.

[0008] Furthermore, the unit meter weight rule base is composed of a calculation unit and a rule base unit, the calculation unit is used to calculate the standard steel billet weight, and the specification base unit is used to provide calculation rules to the calculation unit.

[0009] A control method for an online automatic tracking system for waste cutting of continuous casting billets, characterized by comprising the following steps: S0, statistical cycle, according to the preset process parameters in the preset library, the cycle is preset in units of one pouring, and one pouring is from the start of pouring in the tundish to the end of pouring; S1, data acquisition, continuous casting PLC routine detection continuous casting display casting speed (V1), set length (L1) and pouring time (t) parameters; S3, casting speed correction, the control module randomly selects a fixed-size billet to collect data during the fixed-speed casting stage in each cycle, wherein the casting speed detection module collects the actual casting speed (V2) according to the actual casting length and the actual casting time, the casting time collection module collects the casting time (t1) of the fixed-size billet, and calculates the actual casting speed (V2) according to the set length (L1), and then compares the displayed casting speed (V1) with the actual casting speed (V2) to calculate the casting speed correction coefficient (a); S4, realize the conversion between the casting length and the actual length, collect the set length (L1) of each flow, and compare the set length (L2) with the set length (L1) to obtain the length correction coefficient (b); S5. Calculate the pouring length, collect the pouring display speed (V1) in real time, and calculate the pouring length (L) by combining the total pouring time (t) with the pulling speed correction coefficient (a) and the length correction coefficient (b); S6. Calculate the weight to be put into storage. The control module combines the unit meter weight rule library to enter the unit meter weight (q) of different sections and different steel grades into the MES storage system module, and calculates the weight (T) to be put into storage in combination with the pouring length; S7. Calculate the amount of waste cutting. After calculating the amount of waste cutting for each casting, the control module collects the weight of the billet entering the MES system and compares it with the inventory. The control module then controls the cutting machine in the continuous casting machine to cut the billet. After cutting, the MES warehousing system module records it.

[0010] Furthermore, in step S3, the calculation formula of the actual pulling speed (V2) is V2=L1 / t1, and the calculation formula of the pulling speed correction coefficient (a) is a=V2 / V1.

[0011] Furthermore, in step S4, the length correction coefficient (b) is calculated by the formula b=L2 / L1.

[0012] Furthermore, in step S5, the formula for calculating the pouring length (L) is L=V1*a*t*b.

[0013] Furthermore, in step S6, the calculation formula for the weight to be put into storage (T) is T=L*q.

[0014] Furthermore, in step S7, the incoming weight of the blank is obtained from the MES system, and the amount of scrap is obtained by subtracting the actual incoming weight from the expected incoming weight.

[0015] The beneficial technical effects of the present invention are: (1) An online automatic tracking system for the scrapping of continuous casting billets, which uses a control module, a pouring time acquisition module and a pulling speed detection module to perform statistical cycles on the continuous casting machine in operation in units of pouring times, and randomly selects a fixed-length billet to collect data during the constant-speed pouring stage in each statistical cycle. The functions of spot checks and real-time calibration are added to the traditional continuous casting PLC. While ensuring the stability of the continuous casting process and the initial quality of the continuous casting billets, spot checks can modify the preset parameters according to the actual parameters at regular intervals to prevent a single continuous casting PLC system from working for a long time, which may inevitably cause interference to the sensor signal or external environmental factors, resulting in errors in the detection accuracy and the inability to correct them in real time.

[0016] (2) A control method for an online automatic tracking system for waste cutting of continuous casting billets, wherein the preset parameters of length and casting speed are corrected according to the actual casting speed and length parameters through steps S3 and S4, the actual length of the billet after correction is calculated according to step S5, and the billet is weight-detected and waste cutting is calculated in combination with steps S6 and S7, thereby minimizing waste cutting generation and reducing costs while ensuring warehousing requirements, solving the problem that some billets are not tracked and counted, while others are recorded by production workshop personnel, and manual records are often incomplete and untrue, resulting in increased waste cutting and increased production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a module schematic diagram of an online automatic tracking system for waste cutting of continuous casting billets of the present invention; Figure 2 It is a flow chart of a control method of an online automatic tracking system for waste cutting of continuous casting billets according to the present invention; Figure 3 The present invention is a logic schematic diagram of a control method of an online automatic tracking system for waste cutting of continuous casting billets. DETAILED DESCRIPTION

[0018] In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0019] See attached Figure 1 As shown, a control method for an online automatic tracking system for continuous casting billet scrap cutting includes a continuous casting PLC, a control module, a pouring time acquisition module, a pulling speed detection module, a preset library, an MES warehousing system module and a unit meter weight rule library. The preset library is a preset unit, which is used to preset the fixed cutting length, pulling speed and pouring time of different types of billets. The unit meter weight rule library is a warehousing calculation unit, which is used to calculate the weight of the billet. When the billet is poured and needs to be cut and put into storage, the MES warehousing system module can track the warehousing information.

[0020] The continuous casting PLC can connect signals with the sensors of the continuous casting machine itself for monitoring data.

[0021] The control module is connected to the control device signal in the continuous casting machine, the pouring time acquisition module and the pulling speed detection module are both connected to the continuous casting machine signal, and the control module is respectively connected to the preset library, the MES warehousing system module, the unit meter weight rule library, the pouring time acquisition module and the pulling speed detection module signal, the control module is connected to the continuous casting PLC signal, the continuous casting PLC can monitor the equipment parameters in the continuous casting machine, the pouring time acquisition module can collect data on the pouring time in the continuous casting machine, the pulling speed detection module can collect data on the pulling speed in the continuous casting machine, the MES warehousing system module can record the steel billet warehousing and track the waste cutting, the unit meter weight rule library can calculate the weight of the steel billet, and the preset library is used to formulate the basic parameter values ​​of the continuous casting machine.

[0022] The preset library consists of a storage unit and an output unit. The storage unit is used to store preset values ​​of process parameters such as fixed cutting length, pulling speed and casting time of different types of steel billets. The output unit can transmit the preset information to the continuous casting machine. The unit meter weight rule library consists of a calculation unit and a rule library unit. The calculation unit is used to calculate the fixed steel billet weight, and the specification library unit is used to provide calculation rules to the calculation unit.

[0023] The MES warehousing system module consists of a warehousing detection system and a tracking unit. The warehousing detection system is used to collect and record the weight of the billets entering the warehouse, and the tracking unit is used to track the scrap cutting information, so that the MES warehousing system module can detect the weight of the billets entering the warehouse, and can also cooperate with the control module to automatically track the scrap cutting of the continuous casting billets, avoiding the problem of deviation between the displayed value and the actual value due to the accuracy error of the pulling speed measurement sensor of the continuous casting machine itself, signal interference and external environmental factors.

[0024] Through the control module, combined with the pouring time acquisition module and the casting speed detection module, the continuous casting machine in operation is statistically cycled in units of pouring times, and a fixed-size billet is randomly selected in the constant-speed pouring stage to collect data in each statistical cycle. The functions of spot check and real-time calibration are added to the traditional continuous casting PCL. While ensuring the stability of the continuous casting process and the initial quality of the continuous casting billet, the spot check can modify the preset parameters according to the actual parameters at regular intervals to prevent the single continuous casting PLC system from working for a long time. The sensor signal is inevitably disturbed or there are external environmental factors, which leads to errors in the detection accuracy and cannot be corrected in real time. See attached Figure 2-3 As shown, a control method for an online automatic tracking system for waste cutting of continuous casting billets comprises the following steps: S0, statistical cycle, according to the preset process parameters in the preset library, the cycle is preset in units of one pouring, and one pouring is from the start of pouring in the tundish to the end of pouring; S1, data acquisition, continuous casting PLC routine detection continuous casting display casting speed (V1), set length (L1) and pouring time (t) parameters; S3, drawing speed correction, the control module randomly selects a fixed-size billet to collect data during the fixed-speed pouring stage in each cycle, wherein the drawing speed detection module collects the actual drawing speed (V2) according to the actual pouring length and the actual pouring time, the pouring time acquisition module collects the pouring time (t1) of the fixed-size billet, and calculates the actual drawing speed (V2) according to the set length (L1), and then compares the displayed drawing speed (V1) with the actual drawing speed (V2), and calculates the drawing speed correction coefficient (a), the calculation formula of the actual drawing speed (V2) is V2=L1 / t1, and the calculation formula of the drawing speed correction coefficient (a) is a=V2 / V1; S4. Conversion between casting length and actual length is achieved. Due to deviations in online measurement of each stream, the casting length of each stream is inconsistent with the actual length. Therefore, different cut lengths need to be set for each stream. By collecting the set lengths of each stream, the cut length (L2) is compared with the set length (L1) to obtain the length correction coefficient (b). The calculation formula for the length correction coefficient (b) is b=L2 / L1. S5. Calculate the pouring length, collect the pouring display speed (V1) in real time, and calculate the pouring length (L) by combining the total pouring time (t) with the pulling speed correction coefficient (a) and the length correction coefficient (b). The formula for calculating the pouring length (L) is L=V1*a*t*b; S6. Calculate the weight to be put into storage. The control module combines the unit meter weight rule library to enter the unit meter weight (q) of different sections and different steel grades into the MES storage system module, and calculates the weight (T) to be put into storage in combination with the casting length. The calculation formula of the weight (T) to be put into storage is T=L*q; S7. Calculate the amount of waste cutting. After calculating the amount of waste cutting for each casting, the control module collects the incoming weight of the billet in the MES system and compares it with the expected inventory to calculate the amount of waste cutting for each casting. The control module then controls the cutting machine in the continuous casting machine to cut the billet. The steps for calculating the amount of waste cutting are to first obtain the incoming weight of the billet from the MES system, then subtract the actual incoming weight from the expected incoming weight, and finally the amount of waste cutting can be obtained for accurate waste cutting. After cutting, the MES warehousing system module records it for subsequent review by subsequent staff.

[0025] The method corrects the preset length and the preset pulling speed according to the actual pulling speed and the actual length. The corrected billet calculates the actual length according to step S5, and the billet is weight-detected and the waste is calculated in combination with steps S6 and S7. While ensuring the warehousing requirements, the generation of waste is minimized and the cost is reduced. This solves the problem that some items are not tracked and counted, while others are recorded by production workshop personnel, and manual records are often incomplete and untrue, resulting in increased waste and increased production costs.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An online automatic tracking system for continuous casting billet waste cutting, characterized in that: include: Continuous casting PLC, control module, pouring time acquisition module, pulling speed detection module, preset library, MES warehousing system module and unit meter weight rule library, the control module is connected with the control device signal in the continuous casting machine, the pouring time acquisition module and the pulling speed detection module are both connected with the continuous casting machine signal, and the control module is respectively connected with the preset library, the MES warehousing system module, the unit meter weight rule library, the pouring time acquisition module and the pulling speed detection module signal, and the control module is connected with the continuous casting PLC signal; The continuous casting PLC can monitor the equipment parameters in the continuous casting machine, the pouring time acquisition module can collect data on the pouring time in the continuous casting machine, the pulling speed detection module can collect data on the pulling speed in the continuous casting machine, the MES warehousing system module can record the steel billet warehousing and track the waste cutting, the unit meter weight rule library can calculate the weight of the steel billet, and the preset library is used to formulate the basic parameter values ​​of the continuous casting machine.

2. The continuous casting billet waste cutting online automatic tracking system according to claim 1 is characterized in that: The preset library consists of a storage unit and an output unit. The storage unit is used to store preset values ​​of process parameters such as cut length, drawing speed and casting time of different types of steel billets. The output unit can transmit the preset information to the continuous casting machine.

3. The online automatic tracking system for continuous casting billet waste cutting according to claim 1 is characterized in that: The MES warehousing system module consists of a warehousing detection system and a tracking unit. The warehousing detection system is used to collect and record the weight of the billets entering the warehouse, and the tracking unit is used to track the scrap cutting information.

4. The online automatic tracking system for continuous casting billet waste cutting according to claim 1 is characterized in that: The unit meter weight rule base is composed of a calculation unit and a rule base unit. The calculation unit is used to calculate the weight of the steel billet, and the specification base unit is used to provide calculation rules to the calculation unit.

5. A control method for an online automatic tracking system for continuous casting billet waste cutting according to any one of claims 1 to 4, characterized in that: The following steps are involved: S0, statistical cycle, according to the preset process parameters in the preset library, the cycle is preset in units of one pouring, and one pouring is from the start of pouring in the tundish to the end of pouring; S1, data acquisition, continuous casting PLC routine detection continuous casting display casting speed (V1), set length (L1) and pouring time (t) parameters; S3, casting speed correction, the control module randomly selects a fixed-size billet to collect data during the fixed-speed casting stage in each cycle, wherein the casting speed detection module collects the actual casting speed (V2) according to the actual casting length and the actual casting time, the casting time collection module collects the casting time (t1) of the fixed-size billet, and calculates the actual casting speed (V2) according to the set length (L1), and then compares the displayed casting speed (V1) with the actual casting speed (V2) to calculate the casting speed correction coefficient (a); S4, realize the conversion between the casting length and the actual length, collect the set length (L1) of each flow, and compare the set length (L2) with the set length (L1) to obtain the length correction coefficient (b); S5. Calculate the pouring length, collect the pouring display speed (V1) in real time, and calculate the pouring length (L) by combining the total pouring time (t) with the pulling speed correction coefficient (a) and the length correction coefficient (b); S6. Calculate the weight to be put into storage. The control module combines the unit meter weight rule library to enter the unit meter weight (q) of different sections and different steel grades into the MES storage system module, and calculates the weight (T) to be put into storage in combination with the pouring length; S7. Calculate the amount of waste cutting. After calculating the amount of waste cutting for each casting, the control module collects the weight of the billet entering the MES system and compares it with the inventory. The control module then controls the cutting machine in the continuous casting machine to cut the billet. After cutting, the MES warehousing system module records it.

6. The control method of the online automatic tracking system for continuous casting billet waste cutting according to claim 5 is characterized in that: In step S3, the actual pulling speed (V2) is calculated by V2=L1 / t1, and the pulling speed correction coefficient (a) is calculated by a=V2 / V1.

7. The control method of the online automatic tracking system for continuous casting billet waste cutting according to claim 5 is characterized in that: In step S4, the length correction coefficient (b) is calculated using the formula b=L2 / L1.

8. The control method of the online automatic tracking system for continuous casting billet waste cutting according to claim 5 is characterized in that: In step S5, the formula for calculating the pouring length (L) is L=V1*a*t*b.

9. The control method of the online automatic tracking system for continuous casting billet waste cutting according to claim 5 is characterized in that: In step S6, the calculation formula for the weight to be put into storage (T) is T=L*q.

10. The control method of the online automatic tracking system for continuous casting billet waste cutting according to claim 5, characterized in that: In step S7, the incoming weight of the blank is obtained from the MES system, and the amount of scrap is obtained by subtracting the actual incoming weight from the expected incoming weight.

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