CN113182361B - Method and device for measuring temperature of off-machine roller - Google Patents
Method and device for measuring temperature of off-machine roller Download PDFInfo
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- CN113182361B CN113182361B CN202110414127.8A CN202110414127A CN113182361B CN 113182361 B CN113182361 B CN 113182361B CN 202110414127 A CN202110414127 A CN 202110414127A CN 113182361 B CN113182361 B CN 113182361B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/006—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring temperature
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Abstract
The application discloses a method and a device for measuring the temperature of an off-machine roller, wherein the method comprises the following steps: acquiring a plurality of roller surface temperatures of a roller in a preset time period at a preset sampling frequency; curve fitting is carried out on the roller surface temperatures and the corresponding time to obtain a roller temperature time model; and calculating to obtain the average temperature of the roller according to the roller temperature time model. The method and the device for measuring the temperature of the roll of the off-machine can improve the measurement accuracy of the internal temperature of the roll.
Description
Technical Field
The application relates to the technical field of steel rolling, in particular to a method and a device for measuring the temperature of an off-machine roller.
Background
In the rolling process, the roller is heated and expanded, and the shape of the roller is changed, so that the setting of the plate-shaped model is directly affected. In order to ensure the plate shape setting precision, the expansion amount of the roller needs to be known, but at present, no means for online measurement of thermal expansion exists, and the real-time temperature field of the roller can be generally calculated first, and then the expansion amount is converted. In order to check the calculation accuracy of the roller temperature model, the calculated temperature needs to be compared with the actual temperature, and the measurement of the actual temperature of the roller is always a main problem which puzzles the production line.
At present, the roll surface temperature of a roll is generally measured as the actual temperature of the roll, and the roll surface temperature of the roll is not consistent with the internal temperature, so that the roll surface temperature of the roll is simply measured and does not represent the actual temperature of the roll, and the thermal expansion amount cannot be accurately converted.
Disclosure of Invention
The embodiment of the application can improve the measurement accuracy of the internal temperature of the roller by providing the method and the device for measuring the temperature of the roller of the off-machine.
The application provides a method for measuring the temperature of an off-machine roller, which comprises the following steps:
acquiring a plurality of roller surface temperatures of a roller in a preset time period at a preset sampling frequency;
curve fitting is carried out on the roller surface temperatures and the corresponding time to obtain a roller temperature time model;
and calculating to obtain the average temperature inside the roller according to the roller temperature time model.
Preferably, the step of obtaining a plurality of roll surface temperatures of the roll in a preset time period at a preset sampling frequency includes:
and acquiring the temperatures of the roller surfaces according to the preset sampling frequency by using a temperature measuring probe contacted with the roller.
Preferably, the curve fitting is performed on the temperatures of the roller surfaces and the corresponding times to obtain a roller temperature time model, which includes:
selecting qualified roller surface temperatures meeting preset requirements from the plurality of roller surface temperatures;
and performing curve fitting on the qualified temperature of the roller surface of the roller and the corresponding time to obtain the roller temperature time model.
Preferably, the roller temperature time model comprises a temperature rising curve and a temperature reducing curve.
Preferably, the calculating to obtain the average temperature inside the roller according to the roller temperature time model includes:
calculating the highest point temperature of the roller temperature time model;
and the highest point temperature is taken as the average temperature inside the roller.
The application also provides a device for measuring the temperature of the lower machine roller, which comprises:
the temperature measuring module is used for acquiring a plurality of roller surface temperatures of the roller in a preset time period at a preset sampling frequency;
the data processing module is in communication connection with the temperature measurement model, and the data processing module comprises:
the model generating unit is used for performing curve fitting on the roller surface temperatures and the corresponding time to obtain a roller temperature time model;
and the roller temperature calculation unit is used for calculating and obtaining the average temperature inside the roller according to the roller temperature time model.
Preferably, the temperature measuring module further comprises a temperature measuring probe contacted with the roller.
Preferably, the model generating unit is configured to select a qualified roller surface temperature meeting a preset requirement from the plurality of roller surface temperatures, and perform curve fitting on the qualified roller surface temperature and the corresponding time to obtain the roller temperature time model.
Preferably, the roller temperature time model comprises a temperature rising curve and a temperature reducing curve.
Preferably, the roll temperature calculating unit is configured to calculate a highest point temperature of the roll temperature time model, and take the highest point temperature as an average temperature inside the roll.
One or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages:
according to the method and the device for measuring the temperature of the roll of the off-machine, the roll surface temperature of the roll is continuously measured, curve fitting is carried out by utilizing a plurality of measured roll surface temperature data and the measured roll surface temperature data measuring time to obtain a roll temperature time model, the roll temperature is obtained by calculating by utilizing the roll temperature time model, after the roll is off-machine, the heat in the roll can be emitted from inside to outside, and the average temperature in the roll can be objectively reflected by continuously monitoring the roll surface temperature; the process can accurately obtain the internal average temperature of the lower machine roller as the actual temperature of the roller without estimating the temperature return time of the roller, namely the temperature of the highest point of the temperature return of the roller, and improves the measurement accuracy of the internal temperature of the roller.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of an off-machine roll temperature measurement method provided by an embodiment of the present application;
FIG. 2 is a schematic diagram of a temperature probe for detecting the temperature of a roller according to an embodiment of the present application;
fig. 3 is a schematic view of a roller temperature time model according to an embodiment of the present application.
Detailed Description
In order to make the present application more clearly understood by those skilled in the art, the following detailed description of the technical scheme of the present application will be given by way of specific examples with reference to the accompanying drawings.
As shown in fig. 1, the present application provides a method for measuring a temperature of an off-machine roll, comprising:
s1, acquiring a plurality of roller surface temperatures of a roller in a preset time period at a preset sampling frequency.
Specifically, the roller in the application is a roller detached from the rolling mill after the rolling of the rolling mill is completed. In step S1, in a preset time period after rolling is stopped, a plurality of roll surface temperatures of a roll middle area in the preset time period are obtained according to a preset sampling frequency. The preset time period may range from 0.5 hours to 1 hour, and the sampling frequency may be 10 to 30 seconds/time.
The obtaining the temperatures of the roller surfaces of the roller in the preset time period at the preset sampling frequency specifically comprises the following steps:
as shown in fig. 2, a plurality of roll surface temperatures are obtained according to a preset sampling frequency by using a temperature measuring probe 2 in contact with a roll 1; the contact point between the temperature probe 2 and the roller 1 is covered with a heat insulation material.
Specifically, after the roller is dismounted from the rolling mill, the measuring tape is used for positioning and marking the middle point of the roller body of the roller, the temperature measuring probe is stuck to the middle point of the roller body by the high-temperature adhesive tape, and then the contact point between the temperature measuring probe and the roller is covered by the heat insulating material, so that the contact point between the temperature measuring probe and the roller is relatively isolated from the external environment and is not interfered by the change of the external environment (such as cold air).
S2, performing curve fitting on the roller surface temperatures and the corresponding time to obtain a roller temperature time model.
Curve fitting is carried out on a plurality of roller surface temperatures and corresponding time to obtain a roller temperature time model, and the curve fitting comprises the following steps:
step S21, selecting qualified roller surface temperatures meeting preset requirements from a plurality of roller surface temperatures, and eliminating temperature data which do not meet the preset requirements;
and S22, performing curve fitting on the roller surface of the roller and the corresponding time to obtain a roller temperature time model.
In one embodiment, as shown in fig. 3, the roller temperature time model includes a temperature raising curve and a temperature lowering curve, and the tail of the temperature raising curve is connected with the head of the temperature lowering curve. The temperature of the roller surface on the temperature rising curve increases with time, and the temperature of the roller surface on the temperature reducing curve decreases with time.
And S3, calculating to obtain the average temperature inside the roller according to the roller temperature time model. The average internal temperature of the roll is the average internal temperature of the roll when the roll is taken off, and specifically the average internal temperature of the roll taken off after the rolling mill stops rolling.
According to the roller temperature time model, calculating to obtain the average temperature inside the roller, including:
and calculating the highest point temperature of the roller temperature time model, and taking the highest point temperature as the average temperature inside the roller.
The application also provides a lower machine roller temperature measuring device corresponding to the lower machine roller temperature measurement, which comprises: the temperature measuring module and the data processing module.
The temperature measurement module is used for acquiring a plurality of roller surface temperatures of the roller in a preset time period at a preset sampling frequency.
The temperature measuring module further comprises a temperature measuring probe which is contacted with the roller, and a contact point between the temperature measuring probe and the roller is covered with a heat insulation material.
The data processing module is connected with the temperature measurement model in a communication way, and the data processing module comprises: model generation unit, roll temperature calculation unit.
The model generating unit is used for performing curve fitting on the roller surface temperatures and the corresponding time to obtain a roller temperature time model. The roller temperature time model comprises a heating curve and a cooling curve.
Specifically, the model generating unit is used for selecting qualified roller surface temperatures meeting preset requirements from a plurality of roller surface temperatures, and performing curve fitting on the qualified roller surface temperatures and corresponding time to obtain a roller temperature time model.
The roller temperature calculating unit is used for calculating and obtaining the average temperature inside the roller according to the roller temperature time model.
The roller temperature calculating unit is used for calculating the highest point temperature of the roller temperature time model, and taking the highest point temperature as the average temperature inside the roller.
Typically, after rolling is completed, the rolls undergo several minutes of water cooling before the rolls are removed from the rolling mill, i.e., from the end of rolling to the time the rolls are removed from the rolling mill, and the temperature of the roll surfaces of the rolls of the lower mill undergo a process of first increasing (i.e., returning the temperature) and then decreasing.
At present, in the existing roller temperature measuring scheme, after the roller temperature is finished, the roller surface temperature of the roller is detected once and is used as the roller temperature when the rolling mill stops rolling, so that the roller temperature returning time needs to be estimated, the roller temperature returning time is estimated inaccurately, or external environmental factors cause inaccurate roller surface temperature detection and larger error.
According to the method and the device for measuring the temperature of the off-machine roller, the roller surface temperature of the roller is continuously measured, curve fitting is carried out by utilizing the measured roller surface temperature data and the measured roller surface temperature data measuring time to obtain a roller temperature time model, and the average temperature inside the roller is calculated according to the roller temperature time model.
In addition, in the process of measuring the roller temperature, the temperature measuring probe is in stable contact with the roller and is separated from the external environment through the heat insulation material, so that the influence of the external environment on temperature measurement is reduced, even if unpredictable short-time interference exists, temperature data which do not meet the requirements can be removed through curve processing, and the final roller temperature is not influenced.
While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (4)
1. The method for measuring the temperature of the rolling roller of the off-machine is characterized by comprising the following steps of:
acquiring a plurality of roller surface temperatures of a roller in a preset time period at a preset sampling frequency;
curve fitting is carried out on the roller surface temperatures and the corresponding time to obtain a roller temperature time model, and the curve fitting comprises the following steps: selecting qualified roller surface temperatures meeting preset requirements from the plurality of roller surface temperatures; performing curve fitting on the qualified temperature of the roller surface of the roller and the corresponding time to obtain a roller temperature time model;
the roller temperature time model comprises a temperature rising curve and a temperature lowering curve, wherein the tail part of the temperature rising curve is connected with the head part of the temperature lowering curve;
according to the roller temperature time model, calculating to obtain the average temperature inside the roller, including: calculating the highest point temperature of the roller temperature time model; and taking the highest point temperature as the average temperature inside the roller;
wherein the average temperature inside the roller is the average temperature inside the roller when the roller is taken off.
2. The method of claim 1, wherein the step of obtaining a plurality of roll surface temperatures of the roll for a predetermined period of time at a predetermined sampling frequency comprises:
and acquiring the temperatures of the roller surfaces according to the preset sampling frequency by using a temperature measuring probe contacted with the roller.
3. An off-machine roll temperature measurement device, comprising:
the temperature measuring module is used for acquiring a plurality of roller surface temperatures of the roller in a preset time period at a preset sampling frequency;
the data processing module is in communication connection with the temperature measuring module, and the data processing module comprises:
the model generating unit is configured to perform curve fitting on the plurality of roll surface temperatures and corresponding times to obtain a roll temperature time model, and includes: selecting qualified roller surface temperatures meeting preset requirements from the plurality of roller surface temperatures; performing curve fitting on the qualified temperature of the roller surface of the roller and the corresponding time to obtain a roller temperature time model;
the roller temperature time model comprises a temperature rising curve and a temperature lowering curve, wherein the tail part of the temperature rising curve is connected with the head part of the temperature lowering curve; the roller temperature calculating unit is used for calculating the average temperature inside the roller according to the roller temperature time model, and specifically comprises the following steps: calculating the highest point temperature of the roller temperature time model, and taking the highest point temperature as the average temperature inside the roller;
wherein the average temperature inside the roller is the average temperature inside the roller when the roller is taken off.
4. The roll temperature measuring device of claim 3, wherein the temperature measuring module further comprises a temperature measuring probe in contact with the roll.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110414127.8A CN113182361B (en) | 2021-04-16 | 2021-04-16 | Method and device for measuring temperature of off-machine roller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110414127.8A CN113182361B (en) | 2021-04-16 | 2021-04-16 | Method and device for measuring temperature of off-machine roller |
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| CN113182361A CN113182361A (en) | 2021-07-30 |
| CN113182361B true CN113182361B (en) | 2023-09-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115301731B (en) * | 2022-08-12 | 2023-10-31 | 索罗曼(常州)合金新材料有限公司 | Equidistant rolling method for spiral conical rollers of large-size titanium alloy bars |
| CN115846423B (en) * | 2022-09-14 | 2023-06-30 | 东北大学 | Method for calculating roller temperature in plate and strip rolling process |
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