CN112355059A - Fault detection method for heavy and medium plate mill stand roller - Google Patents
Fault detection method for heavy and medium plate mill stand roller Download PDFInfo
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- CN112355059A CN112355059A CN202011495007.7A CN202011495007A CN112355059A CN 112355059 A CN112355059 A CN 112355059A CN 202011495007 A CN202011495007 A CN 202011495007A CN 112355059 A CN112355059 A CN 112355059A
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Control Of Metal Rolling (AREA)
Abstract
A fault detection method for a heavy and medium plate mill stand roller comprises the following steps: configuring an inverter device for each rack roller; presetting a current maximum threshold value and a torque maximum threshold value when a rack roller is in no-load in a PLC system, and establishing communication network connection between the PLC system and all inverter devices; acquiring no-load data of all the rack rollers, and screening the acquired no-load data of the rack rollers to obtain a current minimum value, a current maximum value, a rotation rejection minimum value and a torque maximum value during no-load; and comparing the screened current minimum value, current maximum value, torque minimum value and torque maximum value with a current maximum threshold value and a torque maximum threshold value preset in a PLC system respectively, and early warning the running state of the frame roller in advance. The invention can realize the data quantization of the working condition in the operation period of the frame roller so as to early warn the operation state of the frame roller in advance, and thoroughly solve the problem that the operation working condition of the frame roller cannot be mastered in real time.
Description
Technical Field
The invention relates to the technical field of medium plate rolling, in particular to a fault detection method for a rack roller of a medium plate rolling mill.
Background
The heavy and medium plate mill frame roller is a working roller way closest to a mill roller, is an important component of medium plate mill mechanical equipment and mainly has the function of helping a rolled piece to be smoothly bitten into a rolling mill. The frame roller is often impacted by the rolled piece when being thrown out, and a motor shaft and a transmission shaft are easy to wear, so that the frame roller is easy to crack and other equipment accidents. Once the rack roller can not normally rotate, the surface of a rolled piece is directly scratched, the surface quality of a finished steel plate is affected, and a batch quality accident is caused.
Due to the particularity of the installation position of the frame roller, equipment maintenance personnel cannot perform point inspection on the equipment during production. Often just discover when the frame roller appears blocking, and then handle, this has brought very big hidden danger for the stable production of medium plate. Therefore, the fault detection method for the stand roller of the heavy and medium plate mill is provided.
Disclosure of Invention
The invention provides a fault detection method for a stand roller of a medium and heavy plate rolling mill, which aims to solve the defects that the operation condition of the stand roller of the existing rolling mill cannot be monitored in real time, and the stand roller is found and processed only when the stand roller is blocked, so that the surface of a rolled piece is scratched, the surface quality of a finished steel plate is influenced, and the like.
The invention adopts the following technical scheme:
a fault detection method for a heavy and medium plate mill stand roller comprises the following steps:
(1) configuring an inverter device for each frame roller;
(2) presetting a current maximum threshold and a torque maximum threshold when the rack roller is in no-load in the PLC system, and establishing communication network connection between the PLC system and all inverter devices;
(3) acquiring no-load data of all the rack rollers, and screening the acquired no-load data of the rack rollers to obtain a current minimum value, a current maximum value, a rotation rejection minimum value and a torque maximum value during no-load;
(4) and (3) comparing the screened current minimum value, current maximum value, rotation rejection minimum value and torque maximum value in the step (3) with the preset current maximum threshold value and torque maximum threshold value in the PLC system in the step (2) respectively, and early warning the running state of the frame roller in advance.
Further, the current maximum threshold and the torque maximum threshold preset in the PLC system in the step (2) are respectively smaller than a current value and a torque value at which a fault occurs when the frame roller is unloaded.
Further, in the step (4), any one of the maximum current value and the maximum torque value of the idle frame roller exceeds the maximum current threshold and the maximum torque threshold preset in the PLC system, and the PLC system sends out an early warning that the frame roller is about to break down during operation to prompt an operator to process in advance.
Further, the current minimum value and the torque minimum value of the idle load of the rack roller in the step (4) are respectively equal to the current maximum threshold value I preset in the PLC system0maxAnd torque maximum threshold value T0maxAnd comparing, wherein if the difference value is larger, the rotating operation of the frame roller is relatively healthy.
Further, if the current minimum value of the idle load of the frame roller is in an ascending trend at certain intervals, the running health condition of the frame roller is about to be problematic, and an operator is prompted to pay special attention.
Specifically, the no-load data acquisition process of the rack roller in the step (3) is as follows: when the rolling mill is in a forward steel biting state, the PLC system judges the running state of the back frame roller of the rolling mill, and if the speed is stable and the rolling mill does not bite steel, the current and torque data of the frame roller in no-load state are continuously recorded; when the rolling mill is in a reverse steel biting state, the PLC system judges the running state of the front frame roller of the rolling mill, and if the speed is stable and the rolling mill does not bite steel, the current and torque data of the frame roller in no-load state are continuously recorded.
Further, the fault detection method for the stand roller of the heavy plate mill further comprises the steps of collecting and screening the current maximum value and the torque maximum value when the stand roller is loaded, if any one data exceeds the current maximum threshold value and the torque maximum threshold value preset in the PLC system, the fact that the roller way is impacted seriously is indicated, and the PLC system prompts an operator to perform production scheduling on rolled steel again.
Specifically, the process of acquiring the maximum current value and the maximum torque value when the rack roller is loaded is as follows: when the rolling mill is in a forward steel biting state, the PLC system collects and records the maximum current value and the maximum torque value when the front frame roller of the mill is loaded; when the rolling mill is in a reverse steel biting state, the PLC system acquires and records the current maximum value and the torque maximum value when the rear frame roller of the rolling mill is loaded.
From the above description of the method of the present invention, it can be seen that the present invention has the following advantages over the prior art:
according to the invention, the current and torque data of the rack roller in no-load are detected, analyzed and screened by the PLC system, so that the current minimum value, the current maximum value, the torque minimum value and the torque maximum value of the rack roller in no-load are obtained, and are compared with the current maximum threshold value and the torque maximum threshold value preset in the PLC system, so that the data quantification of the working condition in the running period of the rack roller is realized, and the early warning of the running state of the rack roller is realized in advance. Therefore, the invention can master the running data of the frame roller in real time and thoroughly solves the problem that the running working condition of the frame roller cannot be mastered in real time.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings. Numerous details are set forth below in order to provide a thorough understanding of the present invention, but it will be apparent to those skilled in the art that the present invention may be practiced without these details.
A fault detection method for a heavy and medium plate mill stand roller refers to FIG. 1, and comprises the following steps:
(1) and an inverter device is provided for each frame roller.
(2) Presetting a current maximum threshold I when a rack roller is unloaded in a PLC system0maxAnd torque maximum threshold value T0maxAnd the PLC system is connected with all the inverter devices through a communication network. The current maximum threshold value and the torque maximum threshold value are respectively slightly smaller than the current value and the torque value of the fault when the rack roller is in no-load, so that the PLC system can conveniently workAnd sending out early warning before the frame roller breaks down, and reserving certain time for the handling of operators.
(3) Acquiring the no-load data of all the rack rollers, screening the acquired no-load data of the rack rollers, and obtaining the minimum current value I in no-load1minMaximum value of current I1maxMinimum value of rotation rejection T1minAnd maximum value of torque T1max。
The no-load data acquisition process of the rack roller in the step (3) is as follows: when the rolling mill is in a forward steel biting state, the PLC system judges the running state of the back frame roller of the rolling mill, and if the speed is stable and the rolling mill does not bite steel, the current and torque data of the frame roller in no-load state are continuously recorded; when the rolling mill is in a reverse steel biting state, the PLC system judges the running state of the front frame roller of the rolling mill, and if the speed is stable and the rolling mill does not bite steel, the current and torque data of the frame roller in no-load state are continuously recorded.
(4) The maximum value I of the current screened in the step (3)1maxAnd maximum value of torque T1maxRespectively comparing the current with the current maximum threshold value I preset in the PLC system in the step (2)0maxAnd torque maximum threshold value T0maxAnd comparing, and early warning the running state of the frame roller in advance.
When the current maximum value I of the idle frame roller in the step (4)1maxAnd maximum value of torque T1maxAny data exceeds a preset current maximum threshold I in the PLC system0maxAnd torque maximum threshold value T0maxAnd the PLC system sends out early warning that the machine frame roller is about to break down during operation and prompts an operator to process in advance.
When the current minimum value and the torque minimum value of the idle frame roller in the step (4) are respectively equal to the current maximum threshold value I preset in the PLC system0maxAnd torque maximum threshold value T0maxAnd in contrast, if the difference is relatively large, the rotating operation of the frame roller is relatively healthy. If the current minimum value of the idle frame roller is in an ascending trend at certain intervals, the operation of the frame roller can be about to fail, and special attention needs to be paid to the operator so as to process in advance.
The invention also includes collectingMaximum value of current I when screening machine frame roller is loaded2maxAnd maximum value of torque T2maxIf any data exceeds the current maximum threshold I preset in the PLC system0maxAnd torque maximum threshold value T0maxIf the impact on the roller table is heavy, the PLC system prompts an operator that the steel rolling needs to be scheduled again.
Maximum value of current I when frame roller is loaded2maxAnd maximum value of torque T2maxThe acquisition process is as follows: when the rolling mill is in a forward steel biting state, the PLC system acquires and records the maximum current value I when the front frame roller of the rolling mill is loaded2maxAnd maximum value of torque T2max(ii) a When the rolling mill is in a reverse steel biting state, the PLC system acquires and records the current maximum value I when the rear frame roller of the rolling mill is loaded2maxAnd maximum value of torque T2max。
Each rack roller is correspondingly provided with a driving motor, and each driving motor is connected with a power supply through an inverter device. The current and torque data specifically refer to the current and torque of the driving motor corresponding to the frame roller.
The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.
Claims (8)
1. A fault detection method for a stand roller of a heavy and medium plate mill is characterized by comprising the following steps:
(1) configuring an inverter device for each frame roller;
(2) presetting a current maximum threshold and a torque maximum threshold when the rack roller is in no-load in the PLC system, and establishing communication network connection between the PLC system and all inverter devices;
(3) acquiring no-load data of all the rack rollers, and screening the acquired no-load data of the rack rollers to obtain a current minimum value, a current maximum value, a rotation rejection minimum value and a torque maximum value during no-load;
(4) and (3) comparing the screened current minimum value, current maximum value, rotation rejection minimum value and torque maximum value in the step (3) with the preset current maximum threshold value and torque maximum threshold value in the PLC system in the step (2) respectively, and early warning the running state of the frame roller in advance.
2. The method for detecting faults of the shell rolls of the heavy and medium plate mill as claimed in claim 1, wherein: and (3) respectively setting a current maximum threshold value and a torque maximum threshold value preset in the PLC system in the step (2) to be smaller than a current value and a torque value of the fault when the rack roller is unloaded.
3. The method for detecting faults of the shell rolls of the heavy and medium plate mill as claimed in claim 2, wherein: and (4) in the step (4), any one of the maximum current value and the maximum torque value of the unloaded frame roller exceeds the maximum current threshold value and the maximum torque threshold value preset in the PLC system, and the PLC system sends out early warning that the frame roller is about to break down during operation and prompts an operator to process in advance.
4. The method for detecting faults of the shell rolls of the heavy and medium plate mill as claimed in claim 1, wherein: the current minimum value and the torque minimum value of the idle load of the rack roller in the step (4) are respectively equal to a current maximum threshold value I preset in the PLC system0maxAnd torque maximum threshold value T0maxAnd comparing, wherein if the difference value is larger, the rotating operation of the frame roller is relatively healthy.
5. The method for detecting faults of the shell rolls of the heavy and medium plate mill as claimed in claim 4, wherein: if the current minimum value of the idle load of the frame roller is in an ascending trend at certain intervals, the running health condition of the frame roller is about to have a problem, and an operator is prompted to pay special attention.
6. The method for detecting faults of the shell rolls of the heavy and medium plate mill as claimed in claim 1, wherein: the no-load data acquisition process of the rack roller in the step (3) is as follows: when the rolling mill is in a forward steel biting state, the PLC system judges the running state of the back frame roller of the rolling mill, and if the speed is stable and the rolling mill does not bite steel, the current and torque data of the frame roller in no-load state are continuously recorded; when the rolling mill is in a reverse steel biting state, the PLC system judges the running state of the front frame roller of the rolling mill, and if the speed is stable and the rolling mill does not bite steel, the current and torque data of the frame roller in no-load state are continuously recorded.
7. The method for detecting faults of the shell rolls of the heavy and medium plate mill as claimed in claim 1, wherein: the method also comprises the steps of collecting and screening the current maximum value and the torque maximum value when the rack roller is loaded, if any data exceeds the current maximum threshold value and the torque maximum threshold value preset in the PLC system, the fact that the roller way is impacted seriously is indicated, and the PLC system prompts an operator to perform production scheduling on the rolled steel again.
8. The method for detecting faults of a plate mill stand roll according to claim 5, wherein: the acquisition process of the maximum current value and the maximum torque value when the rack roller is loaded is as follows: when the rolling mill is in a forward steel biting state, the PLC system collects and records the maximum current value and the maximum torque value when the front frame roller of the mill is loaded; when the rolling mill is in a reverse steel biting state, the PLC system acquires and records the current maximum value and the torque maximum value when the rear frame roller of the rolling mill is loaded.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011495007.7A CN112355059B (en) | 2020-12-17 | 2020-12-17 | Fault detection method for heavy and medium plate mill stand roller |
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| CN202011495007.7A CN112355059B (en) | 2020-12-17 | 2020-12-17 | Fault detection method for heavy and medium plate mill stand roller |
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| CN112355059A true CN112355059A (en) | 2021-02-12 |
| CN112355059B CN112355059B (en) | 2022-08-26 |
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Citations (11)
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| JPH07185628A (en) * | 1993-12-28 | 1995-07-25 | Toshiba Eng Co Ltd | Controller for rolling machine |
| JPH0833911A (en) * | 1994-07-22 | 1996-02-06 | Fuji Electric Co Ltd | Speed control device for rolling mill |
| JP2002192229A (en) * | 2000-12-22 | 2002-07-10 | Sumitomo Metal Ind Ltd | Device for detecting slip in inclined rolling mill having disk roll |
| CN102179413A (en) * | 2009-12-18 | 2011-09-14 | Posco公司 | Method and system to control quality in cold rolling system |
| CN105002350A (en) * | 2015-07-17 | 2015-10-28 | 山西太钢不锈钢股份有限公司 | Method for searching defect of furnace rollers of continuous annealing unit by using electrical parameters |
| JP2017202489A (en) * | 2016-05-09 | 2017-11-16 | Ｊｆｅスチール株式会社 | Steel-sheet monitoring method, steel-sheet monitoring device and trimming facility |
| CN107377631A (en) * | 2017-08-21 | 2017-11-24 | 马鞍山钢铁股份有限公司 | A kind of control system and method that prevent shape rolling mill depth from rolling card |
| CN109821900A (en) * | 2019-02-25 | 2019-05-31 | 石家庄钢铁有限责任公司 | A kind of online test method of mill drive equipment operation irregularity |
| CN110280602A (en) * | 2019-07-19 | 2019-09-27 | 北京宇轩智能科技有限公司 | Intelligent steel rolling rolling assessment system and processing method extremely |
| CN210148950U (en) * | 2018-12-19 | 2020-03-17 | 北京小米移动软件有限公司 | Printer control device and printer |
| CN111282999A (en) * | 2020-02-27 | 2020-06-16 | 包头钢铁（集团）有限责任公司 | Wide and thick plate rolling mill main transmission shaft balancing device with fault monitoring and protecting functions |
-
2020
- 2020-12-17 CN CN202011495007.7A patent/CN112355059B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07185628A (en) * | 1993-12-28 | 1995-07-25 | Toshiba Eng Co Ltd | Controller for rolling machine |
| JPH0833911A (en) * | 1994-07-22 | 1996-02-06 | Fuji Electric Co Ltd | Speed control device for rolling mill |
| JP2002192229A (en) * | 2000-12-22 | 2002-07-10 | Sumitomo Metal Ind Ltd | Device for detecting slip in inclined rolling mill having disk roll |
| CN102179413A (en) * | 2009-12-18 | 2011-09-14 | Posco公司 | Method and system to control quality in cold rolling system |
| CN105002350A (en) * | 2015-07-17 | 2015-10-28 | 山西太钢不锈钢股份有限公司 | Method for searching defect of furnace rollers of continuous annealing unit by using electrical parameters |
| JP2017202489A (en) * | 2016-05-09 | 2017-11-16 | Ｊｆｅスチール株式会社 | Steel-sheet monitoring method, steel-sheet monitoring device and trimming facility |
| CN107377631A (en) * | 2017-08-21 | 2017-11-24 | 马鞍山钢铁股份有限公司 | A kind of control system and method that prevent shape rolling mill depth from rolling card |
| CN210148950U (en) * | 2018-12-19 | 2020-03-17 | 北京小米移动软件有限公司 | Printer control device and printer |
| CN109821900A (en) * | 2019-02-25 | 2019-05-31 | 石家庄钢铁有限责任公司 | A kind of online test method of mill drive equipment operation irregularity |
| CN110280602A (en) * | 2019-07-19 | 2019-09-27 | 北京宇轩智能科技有限公司 | Intelligent steel rolling rolling assessment system and processing method extremely |
| CN111282999A (en) * | 2020-02-27 | 2020-06-16 | 包头钢铁（集团）有限责任公司 | Wide and thick plate rolling mill main transmission shaft balancing device with fault monitoring and protecting functions |
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| CN112355059B (en) | 2022-08-26 |
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