TWI814249B - Method for monitoring temperature of work roll bearing - Google Patents

Abstract

A method for monitoring temperature of work roll bearings is described. In this method, wireless temperature sensors are used to correspondingly sensor bearing boxes of work rolls to obtain temperature sensor data. A wireless receiving gateway unit is used to receive and read the temperature sensor data, and to convert the temperature sensor data into digital signals respectively. The digital signals are sent to a supervisory computer through a network. The supervisory computer deconstructs the digital signals to generate corresponding information and store the information in a database of the supervisory computer. Each of the corresponding information includes a number and a temperature of the corresponding bearing box and a number of the corresponding wireless temperature sensor. The supervisory computer is used to generate temperature changing trend charts of work roll bearings based on the corresponding information, a correspondence table of the bearing boxes numbers and the temperature sensors numbers, pair-matching information of the work rolls and the bearing boxes, and mounted and dismounted information of the work rolls.

Description

Temperature monitoring method of work roll bearings

The present disclosure relates to a rolling technology, and particularly to a temperature monitoring method of work roll bearings.

Generally speaking, the first pickling cold rolling process mainly applies rolling force to the five-station rollers to accurately roll the steel strip from thick to thin into a steel strip with the required thickness. The rolls include work rolls and back rolls. During rolling, the work rolls directly contact the surface of the steel strip. Therefore, the quality of the work roll will directly affect the quality of the product. The working performance of the work roll will become worse due to factors such as long use time, insufficient lubrication, and rising temperature. Among them, excessive temperature of the work roll is a key factor affecting the quality of the work roll.

In the absence of scientific and objective reference data, production units usually adjust production line speeds based on rolling experience to avoid excessively high bearing temperatures of work rolls. However, adjusting the production line speed cannot effectively prevent the temperature of the work roll bearings from continuing to rise. When the temperature of the work roll bearing rises to a certain level, the work roll should be taken offline immediately for maintenance. If the work roll comes off the assembly line too slowly, the temperature of the work roll bearing will rise sharply, causing damage to the work roll bearing.

Therefore, after the roll equipment of the first pickling cold rolling process is put into operation, offline maintenance must be arranged according to the rolling situation to maintain the operational efficiency of the roll equipment. Regarding the offline maintenance schedule of roll equipment, there are three common methods: The first method is to use a computer system to record the number of steel coils produced by the roll, and add up the counter value every time a steel coil is produced. When the accumulated value of the counter reaches a threshold, the work roll is scheduled to be taken off line for maintenance. The second method is to count the mileage of the rolls through a computer system, and accumulate the total length of the steel coil every time a steel coil is produced. When the total mileage accumulated by the counter reaches a threshold, the work roll is scheduled to be taken offline for maintenance. The third method is that when the steel strip slips during the rolling process, or when the surface quality of the steel strip is manually inspected and roll marks, scratches, or bright strips appear, it means that the quality of the work roll is poor. At this time, it is necessary to arrange for offline maintenance of the work roller.

The above methods are based on the most basic recording of the number of steel coils produced or mileage used to determine whether the work roll should be maintained. This approach can only statically summarize and count when the surface quality of the work roll will change and require maintenance, and it cannot dynamically detect the real-time temperature changes inside the work roll bearing to decide whether the work roll needs to be taken offline for maintenance in advance to avoid the work roll being damaged due to maintenance. The temperature rises rapidly and causes bearing damage.

Since the work roll needs to withstand a huge rolling force when the steel strip is rolled, and the speed of the work roll is extremely high, under the action of force and speed, metal chips are prone to peeling off inside the work roll bearing and high-speed friction generates heat. This in turn causes the temperature of the bearings of the work roll to rise rapidly. Therefore, a technology for monitoring the temperature of work roll bearings is urgently needed to solve the problems of conventional technologies.

Therefore, one of the purposes of this disclosure is to provide a temperature monitoring method for work roll bearings, which is based on production data, builds a set of work roll bearing temperature monitoring systems and integrates them into a program-controlled computer system. This can not only monitor the temperature changes of the work roll bearings in real time, but also accurately notify the production unit of the offline maintenance timing of each work roll based on reliable statistical data, thereby improving the overall operating efficiency of the cold rolling process.

Another purpose of this disclosure is to provide a temperature monitoring method for work roll bearings, which can significantly improve the existing work rolls that are damaged due to excessive temperature during online operation, thereby effectively reducing the cost of maintenance manpower and materials.

According to the above object of the present disclosure, a method for temperature monitoring of work roll bearings is proposed. In this method, several wireless temperature sensors are used to sense several bearing boxes of several work rollers to obtain several temperature sensor data, wherein these wireless temperature sensors are respectively provided on the bearing boxes. The wireless receiving gateway unit is used to receive the temperature sensor data, and the wireless receiving gateway unit is used to read the temperature sensor data and convert the temperature sensor data into several digital signals. These digital signals are sent to the program-controlled computer through the network. The program-controlled computer deconstructs these digital signals to generate several corresponding information and stores them in the database of the program-controlled computer. Each piece of corresponding information includes the number and temperature of the corresponding bearing box and the number of the corresponding wireless temperature sensor. The database contains a comparison table of the bearing box number and the temperature sensor number, as well as the matching information of the work roll and the bearing box. As well as information on roll replacement on line for work rolls. A program-controlled computer is used to generate several work roll bearing temperature change trend graphs based on the corresponding information, the comparison table between the bearing box number and the temperature sensor number, the pairing information of the work roll and the bearing box, and the on-line roll change information of the work roll.

According to an embodiment of the present disclosure, each of the above-mentioned wireless temperature sensors is a Zigbee wireless temperature sensor, and the wireless receiving gateway unit is a Zigbee wireless receiving gateway unit.

According to an embodiment of the present disclosure, each of the above corresponding information further includes current information and voltage information of the corresponding wireless temperature sensor.

According to an embodiment of the present disclosure, the above-mentioned temperature monitoring method of the work roll bearing further includes using a program-controlled computer to establish a current and voltmeter when the temperature sensor is operating based on the above-mentioned corresponding information.

According to an embodiment of the present disclosure, the above-mentioned use of a program-controlled computer to establish a current and voltage meter when the temperature sensor is operating based on the above-mentioned corresponding information further includes: one of the voltage information exceeds a preset range within a preset time interval. When a predetermined number of times is exceeded, the voltage information is marked on the current and voltmeter when the temperature sensor is running.

According to an embodiment of the present disclosure, the above-mentioned preset time interval is 2 minutes, the preset range is 3.8V to 4.2V, and the preset number of times is 3 times.

According to an embodiment of the present disclosure, the above-mentioned use of the program-controlled computer to establish the current and voltage meters when the temperature sensors are operating based on the above-mentioned corresponding information further includes: the program-controlled computer does not receive these wireless temperature sensors within a preset unit time. When the sensing information is transmitted from one of them, the last update time of this wireless temperature sensor is marked in the current and voltmeter when the temperature sensor is running.

According to an embodiment of the present disclosure, the above-mentioned default unit time is 3 minutes.

According to an embodiment of the present disclosure, when the temperature of one of the bearing boxes is higher than a preset value, the temperature monitoring method of the work roll bearing further includes displaying an abnormal warning of the bearing box on the program-controlled display interface of the program-controlled computer. .

According to an embodiment of the present disclosure, the temperature monitoring method of the work roll bearing further includes using a program-controlled computer to convert the corresponding information into several electrical digital signals and sending them to a programmable logic controller (PLC) electronic control system.

In view of the fact that the work roll bearings will be damaged due to excessive temperature, it will directly cause the steel coils to be rejected due to poor quality on the line. In addition to the subsequent production line personnel who need to spend a lot of time and energy repairing the work rolls, it will also lead to the delay of related equipment consumables. Replacement will seriously affect production operations. Therefore, a temperature monitoring method for work roll bearings is proposed here, which can accurately notify the production unit of the time for work roll offline maintenance at the appropriate time, and can improve the overall operating efficiency of the cold rolling process.

Please refer to FIGS. 1 and 2 , which respectively illustrate a flow chart of a temperature monitoring method for a work roll bearing and a device schematic diagram of a temperature monitoring system for a work roll bearing according to an embodiment of the present disclosure. The temperature monitoring method of the work roll bearing can be carried out by using the temperature monitoring system 200 of the work roll bearing in Figure 2 . The work roll equipment reduces the thickness of the steel strip by applying rolling force to the work rolls it contains. The work roll bearing 300 is used to sleeve the work roll. The work roll bearing 300 is tightly embedded in the bearing box 310 and can operate.

The temperature monitoring system 200 of the work roll bearing may mainly include several wireless temperature sensors 210, a wireless receiving gateway unit 220, and a program-controlled computer 230. These wireless temperature sensors 210 can be installed on the bearing box 310 of the work roll bearing 300 respectively. Each wireless temperature sensor 210 can be used to sense the temperature of the bearing box 310 of the corresponding work roll bearing 300 during operation, and can generate corresponding temperature sensor data. In some examples, the wireless temperature sensor 210 may be a Zigbee wireless temperature sensor.

The wireless receiving gateway unit 220 and the wireless temperature sensor 210 are signally connected through wireless transmission. The wireless receiving gateway unit 220 can receive temperature sensor data from all wireless temperature sensors 210 . The wireless receiving gateway unit 220 can further interpret the temperature sensor data and convert the temperature sensor data into digital signals respectively. In some examples, the wireless receiving gateway unit 220 may be a Zigbee wireless receiving gateway unit.

The wireless receiving gateway unit 220 can establish a network connection with the program-controlled computer 230 . For example, the wireless receiving gateway unit 220 can establish a TCP/IP Socket connection with the program-controlled computer 230, and send the converted digital signal to the program-controlled computer 230 through this network connection, and the program-controlled computer 230 transmits the converted digital signal through the network connection. This network connection receives the digital signal sent by the wireless receiving gateway unit 220.

The program-controlled computer 230 can deconstruct these digital signals to generate a plurality of corresponding information, and further store the corresponding information in the database of the program-controlled computer 230. Each corresponding information may include the number and temperature of the corresponding bearing box 310 and the number of the corresponding wireless temperature sensor. In some demonstration examples, each corresponding information further includes current information and voltage information of the corresponding wireless temperature sensor 210 to facilitate monitoring whether the wireless temperature sensor 210 is operating normally. In addition, in some examples, the database of the program-controlled computer 230 has a built-in comparison table between the bearing box number and the temperature sensor number, the pairing information of the work roll and the bearing box, and the on-line roll change information of the work roll.

The program-controlled computer 230 can further generate a number of corresponding bearing boxes 310 based on the received corresponding information, the comparison table between the bearing box number and the temperature sensor number, the pairing information of the work roll and the bearing box, and the on-line roll change information of the work roll. Temperature change trend chart of work roll bearings. The program-controlled computer 230 further includes a program-controlled display interface. The program-controlled computer 230 can display the temperature change trend diagram of these work roll bearings on the program-controlled display interface.

Please continue to refer to Figures 1 and 2. When monitoring the temperature of the work roll bearing 300, step 100 can be performed first to use the wireless temperature sensor 210 installed on the bearing case 310 to correspondingly sense the bearing case 310 of the work roll. , and obtain several temperature sensor data. The temperature sensor data may include the temperature of the bearing box 310, as well as the serial number of the wireless temperature sensor 210 and its current and voltage during operation.

Next, step 110 may be performed to utilize the wireless receiving gateway unit 220 to receive the temperature sensor data sensed by each wireless temperature sensor 210 . In some exemplary examples, the wireless receiving gateway unit 220 communicates with the wireless temperature sensor 210 through the Zigbee network protocol. The wireless receiving gateway unit 220 is then used to read the received temperature sensor data and convert the temperature sensor data into digital signals respectively.

Then, step 120 can be performed to establish a network connection with the program-controlled computer 230 using the wireless receiving gateway unit 220 . The wireless receiving gateway unit 220 transmits digital signals to the program-controlled computer 230 through the network, and the program-controlled computer 230 receives the digital signals through the network. The program-controlled computer 230 deconstructs these digital signals to generate a plurality of corresponding information, and stores the corresponding information in the database of the program-controlled computer. Each corresponding information may mainly include the number and temperature of the corresponding bearing box 310 and the number of the corresponding wireless temperature sensor. Each corresponding information may further include current information and voltage information of the corresponding wireless temperature sensor 210 . On the other hand, the database of the program-controlled computer 230 has a built-in comparison table between the bearing box number and the temperature sensor number, the pairing information of the work roll and the bearing box, and the on-line roll change information of the work roll.

Subsequently, step 130 can be performed to use the program-controlled computer 230 to use the corresponding information received by the program-controlled computer 230 and the comparison table of the bearing box number and the temperature sensor number built in the database of the program-controlled computer 230. The matching information of the roller and the bearing box, as well as the on-line roll change information of the work roll, are used to generate a temperature change trend chart of each work roll bearing. The program-controlled computer 230 can display the temperature change trend graphs of these work roll bearings on the program-controlled display interface to facilitate online staff to monitor the temperature changes of the bearing boxes 310 of each work roll bearing 300 in real time. The program-controlled computer 230 continuously compares whether the received temperature of each bearing box 310 exceeds a preset temperature threshold. If the temperature of a bearing box 310 is higher than a preset value, the program-controlled computer 230 can display an abnormal message warning that the temperature of the bearing box 310 is too high on the program-controlled display interface, and further recommend that it be installed in the bearing box 310 The work roll joined by the work roll bearing 300 is offline for maintenance.

When the cold rolling production line is operating, the temperature of the work roll bearings may become too high at any time. The conventional technology records the abnormal temperature data of the work roll bearings by filling in manually, which is easy to miss and the steps are cumbersome. This disclosure uses the computer program of the program-controlled computer 230 to automatically record the temperature changes of the work roll bearings and integrate these production data. After the program-controlled computer 230 collects the abnormal information and conducts integrated analysis, the online staff can query the abnormal history of the bearing box 310 of the work roll bearing 300 through the human-machine interface of the process-controlled computer 230, and display it on the program-controlled display interface.

Please refer to Table 1 below, which lists a query result of the abnormal history of the bearing box 310. Table 1 shows the bearing box number, temperature abnormality occurrence time, work roll speed, maximum abnormal temperature, the time it takes for the temperature of the bearing box 310 to rise from 50 degrees to 60 degrees, and the abnormal threshold value. Through reliable statistical data, online staff can refer to the temperature abnormality history of the bearing box 310 to adjust the rolling strategy. Table I Bearing box number Temperature abnormality occurrence time Work roll speed highest abnormal temperature The time it takes for the temperature to rise from 50 degrees to 60 degrees Exception threshold W092 2021/05/11 18:45:30 610mpm 68.6 degrees 17 minutes and 45 seconds 65 degrees W079 2021/05/15 09:12:40 545mpm 67.3 degrees 20 minutes and 18 seconds 65 degrees W067 2021/05/25 13:20:10 700mpm 72.5 degrees 12 minutes and 7 seconds 65 degrees

In some examples, the programmable computer 230 can be used to create a current and voltage meter when the temperature sensor is operating based on the received corresponding information. The program-controlled computer 230 can display the current and voltage meter when the temperature sensor is operating on the program-controlled display interface to facilitate online staff to monitor the operating status of each wireless temperature sensor 210 in real time. For example, the normal operating voltage of the wireless temperature sensor 210 can be 3.8V to 4.2V, and can return temperature data every 30 seconds. Based on this operating principle of the wireless temperature sensor 210, this embodiment can further design a warning function for abnormal function of the temperature sensor.

Please refer to Table 2 below, which shows part of the current and voltmeter when the temperature sensor is operating. Table 2 shows the bearing box number, temperature sensor number, temperature sensor last update time, bearing box temperature, and temperature sensor voltage and other information. Table II Bearing box number Sensor number Last updated Bearing box temperature Sensor voltage W048 B979 2021-07-26 15:43:21 40.4 3.97 W049 138A 2021-07-26 15:42:00 34.5 3.96 W050 A685 2021-07-23 21:35:58 35.6 4.03 W051 45BA 2021-07-26 15:43:11 34.2 3.37 W052 A6D5 2021-07-26 15:43:21 34.8 3.81 W053 BD89 2021-07-26 15:42:21 36.8 3.95 W054 BF01 2021-07-26 15:43:28 37.1 3.89 W055 443A 2021-07-06 09:14:54 28.6 3.86 W056 BB05 2021-07-26 15:43:14 36.7 3.82 W057 12E0 2021-07-26 15:43:11 45.4 3.84 W058 BD80 2021-07-26 15:41:39 45.5 3.87

In some examples, when using the program-controlled computer 230 to create a current and voltage table when the temperature sensor is operating based on the received corresponding information, a certain voltage information in the table exceeds a preset value within a preset time interval. When the range exceeds a predetermined number of times, the voltage information is marked on the current and voltmeter of the temperature sensor when it is running. In some demonstration examples, the preset time interval is 2 minutes, the preset range is 3.8V to 4.2V, and the preset number of times is 3 times. In this example, the sensor voltage field in the column with bearing housing number 51 can be highlighted in yellow, for example.

In some examples, when the programmable computer 230 is used to establish a current and voltage meter when the temperature sensor is operating based on the received corresponding information, the programmable computer 230 does not receive a wireless temperature sensor within a preset unit time. When the sensing information is transmitted from the device, the last update time of the wireless temperature sensor is marked on the current and voltmeter when the temperature sensor is running. In some demonstration examples, the default unit time is 3 minutes. In this example, the last updated time fields in the two columns of bearing box numbers 50 and 55 can be alerted in green, for example.

When the cold rolling production line is running, if the temperature of the work roll bearings is too high, the online operators need to be alerted immediately so that the online operators can make follow-up relevant procedures in a timely manner to avoid damage to the work roll bearings due to excessive temperature. . Subsequent related processing procedures may include, for example, slowing down the production line, increasing the amount of cooling water, shutting down the production line and changing rolls, etc. Therefore, the implementation of the present disclosure can integrate the warning function into the program-controlled screen that is most frequently viewed by online workers, so as to promptly notify the online operators that abnormal temperatures of the work roll bearings have occurred. In some demonstration examples, this warning function can be integrated into the Line Tracking program control screen that is most frequently viewed by online operators to achieve the most effective and timely warning purpose.

In view of the many factors that cause the temperature of the work roll bearing to rise rapidly, if the cause of the abnormality needs to be traced and analyzed afterwards, the temperature trend data alone cannot meet the analysis needs. Therefore, in some examples, the temperature monitoring method of work roll bearings further uses the program-controlled computer 230 to convert the received corresponding information into several electrical digital signals, and throws these electrical digital signals to the programmable logic controller electronic control system. , thereby integrating and storing temperature data into the electronically controlled digital platform. In some demonstration examples, the program-controlled computer 230 throws the real-time temperature data of each on-line work roller to the programmable logic controller electronic control system every second. In this way, users can search for various electrical signal data and temperature data in a specific time period on the electronically controlled digital platform to conduct diversified analysis.

In addition, in some examples, user query services can be provided on a web page, so that users are not limited to specific operating systems and specific software programs to query the integrated and analyzed data. For example, a query web page can be developed in the Personal Home Page (PHP) programming language. Due to the high compatibility of web pages developed in the personal home page programming language, users can easily access web page information no matter which web browser they use, which can greatly improve work efficiency.

It can be seen from the above implementation that one of the advantages of the present disclosure is that the temperature monitoring method of the work roll bearing of the present disclosure is based on the production data, and a set of work roll bearing temperature monitoring system is built and integrated into the program-controlled computer system. This can not only monitor the temperature changes of the work roll bearings in real time, but also accurately notify the production unit of the offline maintenance timing of each work roll based on reliable statistical data, thereby improving the overall operating efficiency of the cold rolling process.

Another advantage of the present disclosure is that the present disclosure can significantly improve the problem of existing work rollers being damaged due to excessive temperature during online operation, and therefore can effectively reduce the cost of maintenance manpower and materials.

Although the present disclosure has been disclosed through embodiments, they are not intended to limit the present disclosure. Anyone with ordinary knowledge in this technical field can make various changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of the present disclosure shall be subject to the scope of the appended patent application.

100: steps 110: Steps 120: Steps 130: Steps 200: Temperature monitoring system for work roll bearings 210:Wireless temperature sensor 220: Wireless receiving gateway unit 230: Program-controlled computer 300:Work roll bearing 310:Bearing box

In order to make the above and other objects, features, advantages and embodiments of the present disclosure more obvious and understandable, the accompanying drawings are described as follows: [Fig. 1] is a flow chart illustrating a temperature monitoring method of a work roll bearing according to an embodiment of the present disclosure; and [Fig. 2] is a schematic diagram of a device of a temperature monitoring system for work roll bearings according to an embodiment of the present disclosure.

Domestic storage information (please note in order of storage institution, date and number) without Overseas storage information (please note in order of storage country, institution, date, and number) without

200: Temperature monitoring system for work roll bearings 210:Wireless temperature sensor 220: Wireless receiving gateway unit 230: Program-controlled computer 300:Work roll bearing 310:Bearing box

Claims (8)

A temperature monitoring method for work roll bearings, including: using a plurality of wireless temperature sensors to correspondingly sense a plurality of bearing boxes of a plurality of work rolls to obtain a plurality of temperature sensor data, wherein the wireless temperature sensors are respectively provided on the bearing boxes; a wireless receiving gateway unit is used to receive the temperature sensor data, and the wireless receiving gateway unit is used to read the temperature sensor data and convert the temperature sensor data to The detector data are converted into a plurality of digital signals respectively; the digital signals are transmitted to a program-controlled computer through a network, wherein the program-controlled computer deconstructs the digital signals to generate a plurality of corresponding information and stores the data in the program-controlled computer In the database, each corresponding information includes the corresponding number and temperature of the bearing box, the corresponding number of the wireless temperature sensor, and the corresponding current information and voltage information of the wireless temperature sensor. The database contains a comparison table of the bearing box number and the temperature sensor number, the pairing information of the first work roll and the bearing box, and the online roll change information of the first work roll; using the program-controlled computer based on the corresponding information, the bearing box number Compare the table with the temperature sensor number, the pairing information of the work roll and the bearing box, and the on-line roll change information of the work roll to generate a plurality of work roll bearing temperature change trend graphs; and use the program-controlled computer to create a model based on the corresponding information A current and voltmeter when the temperature sensor is operating. The temperature monitoring method of work roll bearings as described in claim 1, Each of the wireless temperature sensors is a Zigbee wireless temperature sensor, and the wireless receiving gateway unit is a Zigbee wireless receiving gateway unit. The temperature monitoring method of work roll bearings as described in claim 1, wherein the program-controlled computer is used to establish a current and voltage meter when the temperature sensor is running based on the corresponding information, and further includes: one of the voltage information is in When a preset range exceeds a predetermined number of times within a preset time interval, the voltage information is marked on the current and voltage meter when the temperature sensor is operating. As for the temperature monitoring method of the work roll bearing described in claim 3, the preset time interval is 2 minutes, the preset range is 3.8V to 4.2V, and the predetermined number of times is 3 times. The temperature monitoring method of work roll bearings as described in claim 1, wherein using the program-controlled computer to establish the current and voltmeter when the temperature sensor is running based on the corresponding information further includes: setting a preset unit in the program-controlled computer When no sensing information is received from one of the wireless temperature sensors within a certain period of time, the current and voltmeter of the wireless temperature sensor will be marked on the current and voltmeter when the temperature sensor is running. 1 last updated time. The temperature monitoring method of work roll bearings as described in claim 5, The preset unit time is 3 minutes. The temperature monitoring method of the work roll bearing described in claim 1 further includes a program-controlled display interface of the program-controlled computer that displays the temperature of the bearing boxes when the temperature of one of the bearing boxes is higher than a preset value. This is an unusual warning. The temperature monitoring method of the work roll bearing described in claim 1 further includes using the program-controlled computer to convert the corresponding information into a plurality of electrical digital signals and throwing them to a programmable logic controller electronic control system.

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