CN111889521B - Control device and method for reducing damage degree of steel pile of continuous rolling unit - Google Patents
Control device and method for reducing damage degree of steel pile of continuous rolling unit Download PDFInfo
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- CN111889521B CN111889521B CN202010604277.0A CN202010604277A CN111889521B CN 111889521 B CN111889521 B CN 111889521B CN 202010604277 A CN202010604277 A CN 202010604277A CN 111889521 B CN111889521 B CN 111889521B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B33/00—Safety devices not otherwise provided for; Breaker blocks; Devices for freeing jammed rolls for handling cobbles; Overload safety devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
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Abstract
The invention relates to a control device and a control method for reducing the damage degree of steel piling of a continuous rolling unit, and belongs to the technical field of automatic control of metallurgical equipment. The technical scheme of the invention is as follows: the frequency conversion cabinet (2) provides a frequency conversion power supply for the motor (3), the motor (3) drives the steel rolling machinery (4), a steel stacking signal detected by the steel stacking detection device (5) is connected with the programmable controller (1) through a cable or a communication network (6), and the programmable controller (1) controls the start and stop of the frequency conversion cabinet (2) through the communication network (6) and detects the torque value and the steel stacking fault signal of the frequency conversion cabinet in real time. The invention has the beneficial effects that: the method has the advantages that the rotation of the relevant rolling mill in the fault area is automatically stopped in time according to the load state of the fault rolling mill and the rolled blank position, the loss caused by steel piling is reduced to the minimum, the accident handling time is shortened, the yield in the fault state is improved, the method is easy to implement, good in stability and remarkable in effect, and has good popularization and application values in the industry.
Description
Technical Field
The invention relates to a control device and a control method for reducing the damage degree of steel piling of a continuous rolling unit, and belongs to the technical field of automatic control of metallurgical equipment.
Background
In the continuous rolling production of the metallurgical industry, once equipment failure occurs, steel piling accidents are often caused, such as frequency conversion cabinet failure, encoder failure, communication failure, safety pin fracture and the like, and particularly, the damage degree caused by the steel piling accidents occurring in a rough rolling area is more serious: because the section size of the rough rolling blank is large, the piled steel often collides the guide and the guide of the inlet and the outlet of the rolling mill and the guide pipe, the deformed blank section between the rollers is difficult to clean, the accident handling time is long, and serious piled steel can cause major equipment accidents such as the displacement of a speed reducer, the bending of a transmission shaft and the like.
The current operation flow is as follows: when a steel piling accident occurs in a steel rolling production line, an operator manually beats down a stop button in a fault area, and the steel piling accident is processed after a rolling mill stops. This mode of operation has two significant drawbacks: firstly, the time delay of the action of the stop button is caused by the necessary reaction and confirmation time of the operator to the steel piling accident, and the severity of the accident is inevitably aggravated. And secondly, a fault area stop button is effective to the whole rolling mill area, when two billets are rolled simultaneously in the fault rolling mill area, the two billets can be clamped on a rolling line simultaneously by stopping operation, so that the accident is enlarged, and the yield is reduced.
Disclosure of Invention
The invention aims to provide a control device and a control method for reducing the damage degree of steel piling of a continuous rolling mill set, wherein a control system automatically stops the rotation of a related rolling mill in a fault area in time according to the load state of a fault rolling mill and the position of a rolled billet section after receiving a fault signal of the rolling mill, when two billets are rolled in the rolling mill area and the fault rolling mill is rolling the next billet section, a downstream rolling mill for rolling the previous billet section continues to roll, the rolling mill number of steel blocking can be reduced, the loss caused by steel piling is reduced to the minimum, the accident handling time is reduced, the yield in the fault state is improved, the control device and the control method are easy to implement, good in stability and remarkable in effect, have good popularization and application values in the industry, and effectively solve the problems in the background technology.
The technical scheme of the invention is as follows: a control device for reducing the damage degree of piled steel of a continuous rolling mill set comprises a programmable controller, a frequency conversion cabinet, a motor, a steel rolling machine, a piled steel detection device and a communication network, wherein the programmable controller is connected with the frequency conversion cabinet through the communication network; the steel piling detection device transmits the detected steel piling fault signal to the programmable controller, and the programmable controller controls the starting and stopping of the frequency conversion cabinet through the communication network and detects the torque value and the fault signal of the frequency conversion cabinet in real time.
The steel rolling machinery is all rolling mills in the region, and each rolling mill is matched with a frequency conversion cabinet of the rolling mill.
The steel piling detection device is common detection equipment known in the field, and automatically sends out a steel piling signal after a steel piling fault occurs in a rolling mill, and a programmable controller controls a frequency conversion cabinet to perform corresponding operation.
A control method for reducing the damage degree of the steel piling of the continuous rolling mill set is characterized in that if a faulted rolling mill is in an idle state, a programmable controller of a control device immediately sends a quick stop command to a faulted rolling mill frequency conversion cabinet and a frequency conversion cabinet of an upstream rolling mill in the region after receiving a fault signal which is sent by a frequency conversion cabinet or a steel piling detection device and causes the steel piling, and the rolling mill stops; if the rolling mill with the fault is in a loading state, the programmable controller controls the variable frequency cabinet of the rolling mill, the rolling mill rolling the same billet as the rolling mill and the variable frequency cabinet of the upstream rolling mill to execute a quick stop command, and the controlled rolling mill stops. And if the accident breaking shear between the fault area and the upstream area can break the blank of the upstream area, controlling the rolling mill to stop only in the fault area.
And the steel piling detection device automatically sends a steel piling signal to the programmable controller after the rolling mill has a steel piling fault.
The programmable controller judges the state of the faulted rolling mill and the position of a rolled steel billet through a steel biting signal, a loaded state signal and an unloaded state signal of the rolling mill; the steel biting signal, the loaded state signal and the no-load state signal of the rolling mill are determined by comparing the torque amplitude of the variable frequency cabinet of the rolling mill with the load characteristic value in real time through the programmable controller; the judgment of the steel rolling billet position of the rolling mill is determined by the logical operation result of the steel biting signal, the loaded state signal and the unloaded state signal of each rolling mill.
The invention has the beneficial effects that: the control system automatically stops the rotation of the relevant rolling mill in the fault area in time according to the load state of the fault rolling mill and the rolled blank section after receiving a fault signal causing the steel piling of the rolling mill, when two blanks are rolled in the rolling mill area at the same time and the fault rolling mill is rolling the next blank, the downstream rolling mill rolling the previous billet continues rolling, the rolling mill number of steel blocking can be reduced, the loss caused by the steel piling is reduced to the minimum, the accident handling time is reduced, the yield in the accident state is improved, the implementation is easy, the stability is good, the effect is obvious, and the popularization and application value in the industry is good.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the blank rolling process in the rough rolling zone of the present invention;
in the figure: the device comprises a programmable controller 1, a frequency conversion cabinet 2, a motor 3, a steel rolling machine 4, a steel piling detection device 5, a communication network 6, a rough rolling area 1# rolling mill 11, a rough rolling area 2# rolling mill 12, a rough rolling area 3# rolling mill 13, a rough rolling area 4# rolling mill 14, a rough rolling area 5# rolling mill 15, a rough rolling area 6# rolling mill 16, a first billet section 17 and a second billet section 18.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present invention with reference to the drawings of the embodiments, and it is obvious that the described embodiments are a small part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
A control device for reducing the damage degree of piled steel of a continuous rolling mill set comprises a programmable controller 1, a frequency conversion cabinet 2, a motor 3, a rolling mill 4, a piled steel detection device 5 and a communication network 6, wherein the programmable controller 1 is connected with the frequency conversion cabinet 2 through the communication network 6, the frequency conversion cabinet 2 provides a variable frequency power supply for the motor 3, the motor 3 drives the rolling mill 4, and the piled steel detection device 5 is connected with an input terminal of the programmable controller 1; the programmable controller controls the starting and stopping of the frequency conversion cabinet through the communication network and detects the torque value and the fault signal of the frequency conversion cabinet in real time.
A control method for reducing the damage degree of the steel piling of the continuous rolling mill set is characterized in that if a faulted rolling mill is in an idle state, a programmable controller of a control device immediately sends a quick stop command to a faulted rolling mill frequency conversion cabinet and a frequency conversion cabinet of an upstream rolling mill in the region after receiving a fault signal which is sent by a frequency conversion cabinet and a steel piling detection device and causes the steel piling, and the rolling mill stops; if the rolling mill with the fault is in a loading state, the programmable controller controls the variable frequency cabinet of the rolling mill, the rolling mill rolling the same billet as the rolling mill and the variable frequency cabinet of the upstream rolling mill to execute a quick stop command, and the controlled rolling mill stops. And if the accident breaking and shearing of the blanks in the upstream area exists between the fault area and the upstream area, controlling the rolling mill in the fault area to stop. For example: and accident breaking and cutting are carried out between the rough rolling area and the intermediate rolling area, when a steel piling accident occurs in the intermediate rolling area, the control system only controls the relative rolling mills in the intermediate rolling area to stop rotating, the rolling mills in the rough rolling area do not stop rotating, and the blanks rolled in the rough rolling area are broken by the accident breaking and cutting.
And the steel piling detection device automatically sends a steel piling signal to the programmable controller after the steel piling fault occurs in the rolling mill.
The programmable controller judges the state of the faulted rolling mill and the position of a rolled steel billet through a steel biting signal, a loaded state signal and an unloaded state signal of the rolling mill; the steel biting signal, the loaded state signal and the no-load state signal of the rolling mill are determined by comparing the torque amplitude of a variable frequency cabinet of the rolling mill with a load characteristic value in real time through a programmable controller, wherein the load characteristic value is an intermediate value which is larger than the maximum no-load torque of the rolling mill and smaller than the minimum loaded torque; the steel blank position of the rolling mill is determined by the logical operation result of the steel biting signal, the loaded state signal and the unloaded state signal of each rolling mill.
In practical application, as shown in fig. 1, a programmable controller 1 is connected with a frequency conversion cabinet 2 through a communication network 6, the frequency conversion cabinet 2 provides a frequency conversion power supply for a motor 3, the motor 3 drives a steel rolling machine 4, and a steel piling detection device 5 is connected with an input terminal of the programmable controller 1. Fault signals of the frequency conversion cabinet 2 (such as tube burst, over-temperature, encoder fault and communication fault of the frequency conversion cabinet) and fault signals of the steel piling detection device 5 (such as safety pin breakage, pin disengagement of a rolling mill and the like) are transmitted to the programmable controller 1 through signal wires.
If the faulted rolling mill is in an idle state, a programmable controller of the control device immediately sends a quick stop command to the faulted rolling mill frequency conversion cabinet and the frequency conversion cabinet of the rolling mill in the upstream region thereof after receiving a fault signal which is sent by the frequency conversion cabinet or the steel piling detection device and causes steel piling, and the rolling mill stops; if the rolling mill with the fault is in a loading state, the programmable controller controls the variable frequency cabinet of the rolling mill, the rolling mill rolling the same billet as the rolling mill and the variable frequency cabinet of the upstream rolling mill to execute a quick stop command, and the controlled rolling mill stops.
The steel biting signal, the loading state signal and the no-load state signal of each rolling mill are determined by detecting the torque amplitude change of the variable frequency cabinet of each rolling mill by the programmable controller 1: each rolling mill frequency conversion cabinet transmits respective load torque data to the programmable controller 1 in real time, the programmable controller 1 detects load torque amplitude change of each frequency conversion cabinet in real time, when the torque amplitude of a certain frequency conversion cabinet exceeds a load characteristic value (if no-load torque is about 10%, and load torque is more than 40%, the load characteristic value can be set to be 25%), the change signal is a steel biting signal, the state signal is a loading state signal of the rolling mill, and the no-load state signal and the loading state signal are in an inverse logic relation.
And the billet section of the billet rolled by each rolling mill is identified according to the logical operation result of the steel biting signal, the loaded state signal and the unloaded state signal of each rolling mill.
Taking the rough rolling area as an example (as shown in fig. 2), assuming that at most two billet sections are simultaneously rolled at any time, when the programmable controller 1 detects a steel biting signal of the 3# rolling mill 13 in the rough rolling area, if all the rolling mills in the downstream of the 3# rolling mill 13 in the rough rolling area are in an idle state, the billet being rolled by the rolling mill is the first billet section 17; if any one of the rolling mills downstream of the roughing zone 3# rolling mill 13 is in the loaded state, the billet being rolled by the roughing zone 3# rolling mill 13 is the second billet 18, and until the rolling mill downstream of the rolling mill is in the unloaded state, the billet rolled by the rolling mill becomes the first billet 17. The method of judging the rolled material section in the other rolling mills is the same as that of the rough rolling zone # 3 rolling mill 13 in the example. When the programmable controller 1 detects a steel piling accident signal of the rough rolling area 3# rolling mill 13, if the rough rolling area 3# rolling mill 13 is in an idle state, the programmable controller 1 controls the rough rolling area 3# rolling mill 13, the upstream rough rolling area 2# rolling mill 12 and the rough rolling area 1# rolling mill 11 to stop immediately; if the rough rolling area 3# rolling mill 13 is in a loaded state and the rolled blank is the first billet section 17, all rolling mills rolling the first billet section 17 and upstream rolling mills thereof are immediately stopped; if the rough rolling area 3# rolling mill 13 is in a loaded state and the rolled blank is the second billet 18, all rolling mills rolling the second billet 18 and the rolling mills upstream thereof are immediately stopped under the control of the programmable controller, while the rolling mill rolling the first billet 17 is continuously operated, and the first billet 17 is continuously rolled without being influenced by the accident, so that the accident range is reduced as much as possible, and the yield is improved.
Claims (2)
1. A control method for reducing the damage degree of piled steel of a continuous rolling mill set is characterized in that a used control device comprises a programmable controller (1), a frequency conversion cabinet (2), a motor (3), a steel rolling machine (4), a piled steel detection device (5) and a communication network (6), wherein the programmable controller (1) is connected with the frequency conversion cabinet (2) through the communication network (6), the frequency conversion cabinet (2) provides a frequency conversion power supply for the motor (3), the motor (3) drives the steel rolling machine (4), and the piled steel detection device (5) is connected with the programmable controller (1) through a cable or the communication network (6); pile fault signal of steel detection device (5) and pass to programmable controller (1), programmable controller (1) controls the start and the stop of frequency conversion cabinet (2) and detects the torque value and the fault signal of frequency conversion cabinet in real time through communication network (6), its characterized in that: if the rolling mill with the fault is in an idle state, the programmable controller of the control device immediately sends a quick stop command to the frequency conversion cabinet of the rolling mill with the fault and the frequency conversion cabinet of the rolling mill in the upstream region thereof after receiving a fault signal which is sent by the frequency conversion cabinet or the steel piling detection device and causes steel piling, and the rolling mill stops; if the rolling mill with the fault is in a loaded state, the programmable controller immediately sends a quick stop command to the frequency conversion cabinet of the rolling mill, the rolling mill rolling the same billet as the rolling mill and the frequency conversion cabinet of the upstream rolling mill of the rolling mill, and the controlled rolling mill stops; if the accident breaking shear can break the billet in the upstream area between the fault area and the upstream area, only the fault area rolling mill is controlled to stop.
2. The control method for reducing the damage degree of the steel pile of the continuous rolling mill train according to claim 1, is characterized in that: the programmable controller judges the state of the faulted rolling mill and the position of the billet through a steel biting signal, a loaded state signal and an unloaded state signal of the rolling mill; the steel biting signal, the loaded state signal and the no-load state signal of the rolling mill are determined by comparing the torque amplitude of the variable frequency cabinet of the rolling mill with the load characteristic value in real time through the programmable controller; the judgment of the steel rolling billet position of the rolling mill is determined by the logical operation result of the steel biting signal, the loaded state signal and the unloaded state signal of each rolling mill.
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| CN202010604277.0A CN111889521B (en) | 2020-06-29 | 2020-06-29 | Control device and method for reducing damage degree of steel pile of continuous rolling unit |
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| CN202010604277.0A CN111889521B (en) | 2020-06-29 | 2020-06-29 | Control device and method for reducing damage degree of steel pile of continuous rolling unit |
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| CN114082791B (en) * | 2021-11-22 | 2023-05-26 | 阳春新钢铁有限责任公司 | Control system and method for grinding through pre-waking of spiral finished plastic coil through pipe |
| CN114527724B (en) * | 2022-01-11 | 2024-04-30 | 阳春新钢铁有限责任公司 | System and method for rapidly processing faults of high-low pressure oil station of high-line finish rolling motor |
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| DE4413913C2 (en) * | 1993-04-30 | 1998-10-15 | Krupp Hoesch Stahl Ag | Method of preventing folding jam when rolling metal strip |
| CN2623368Y (en) * | 2003-06-09 | 2004-07-07 | 叶光平 | Workpiece stack steel detector of H shaped steel continuous rolling mill train |
| CN208019154U (en) * | 2018-02-28 | 2018-10-30 | 首钢京唐钢铁联合有限责任公司 | A kind of cold-rolling galvanization line threading steel detection device |
| CN109821900B (en) * | 2019-02-25 | 2020-07-14 | 石家庄钢铁有限责任公司 | Online detection method for working abnormity of rolling mill transmission equipment |
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