Intelligent manufacturing device and processing method for transformer thermometer dial

Abstract

The intelligent manufacturing device comprises a constant-temperature oil groove, a temperature measuring assembly, one or more angle sensing devices, an upper computer and a laser engraving machine, and each angle sensing device comprises a rotating shaft and an angle sensor which are integrally installed; a temperature sensing element of the temperature measuring assembly is immersed in the constant-temperature oil groove and connected with a rotating shaft of the angle sensing device, the angle sensor is connected with the upper computer through an angle signal transmission cable, the constant-temperature oil groove is connected with the upper computer through a constant-temperature oil groove control cable, and the upper computer is connected with the laser engraving machine through a signal control cable. The processing method comprises the following steps: S1, starting upper computer cooperative control software; s2, operating the intelligent manufacturing device; s3, generating a dial image with scales; and S4, manufacturing a high-precision dial. The device is convenient to use, high in efficiency, safe and reliable, and has the advantages of being easy to operate, stable in process and good in product quality.

Description

Technical Field

[0001] The invention relates to the technical field of transformer thermometer processing equipment, in particular to an intelligent manufacturing device and a processing method for a transformer thermometer dial. Background Art

[0002] The production method of transformer thermometer dial directly affects the accuracy and production efficiency of the thermometer. At present, there are two main production methods for transformer thermometer dial:

[0003] 1. Batch production of dials with different angles: Batch production of dials with different angles, and can be selected according to the angle size of the thermometer. This dial batch production method is simple, with high production efficiency and low cost, but the thermometer accuracy is low.

[0004] 2. Segmented linear customized dial: The angle dial will be installed on the thermometer, and each temperature point corresponds to a temperature value. Figure 1 As shown, multiple constant temperature oil tanks are set at -20℃, 20℃, 60℃, 100℃ and 140℃ respectively, and the angle values ​​corresponding to the above five temperature points are manually read to obtain four angles α1, α2, α3 and α4, and the scales in the four angles are linearly distributed. The process of piecewise linear customized dial is complicated, the reading angle is affected by human factors, the production efficiency is low, the cost is high, and the thermometer has high accuracy. Summary of the invention

[0005] In order to solve the deficiencies of the prior art, the present invention provides an intelligent manufacturing device and method for a transformer thermometer dial, which has the advantages of easy use, high efficiency and safety, reliable process and good product quality through structural improvement and application of automated software.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] A device for intelligently manufacturing a transformer thermometer dial comprises a constant temperature oil tank, a temperature measuring component, an angle sensing device, a host computer and a laser engraving machine, wherein the number of the angle sensing devices is one or more, the angle sensing device comprises an integrally installed rotating shaft and an angle sensor, the temperature sensing element of the temperature measuring component is immersed in the constant temperature oil tank and connected to the rotating shaft of the angle sensing device, the angle sensor is connected to the host computer via an angle signal transmission cable, the temperature measuring component senses the temperature of the constant temperature oil tank and drives the rotating shaft to rotate, the rotating shaft outputs angle data by driving the angle sensor to rotate, the constant temperature oil tank is connected to the host computer via a constant temperature oil tank control cable, the host computer is connected to the laser engraving machine via a signal control cable, the host computer generates a dial image and a scale position after collecting angle and temperature data, and the laser engraving machine realizes precise processing of the dial.

[0008] The constant temperature oil tank includes a temperature sensor, a working oil chamber, a stirring device, a heating device and a cooling device. The working oil chamber is filled with a heat-conducting medium. The temperature sensor, the stirring device, the heating device and the cooling device are all installed in the working oil chamber. The temperature sensor transmits the temperature of the heat-conducting medium in the constant temperature oil tank to the host computer in real time through a signal transmission line. The heating device receives the working instructions of the host computer and, together with the stirring device and the cooling device, maintains the temperature of the heat-conducting medium in the working oil chamber stable.

[0009] The host computer includes a central processing unit and an input and display device. The central processing unit is used to collect and output various control signals related to the constant temperature oil tank and the angle sensor device, and convert analog signals into digital signals, as well as communicate with the touch computer, send detection information and receive detection results; the input and display device is used to receive basic information of the constant temperature oil tank, the angle sensor, the laser engraving machine, and the dial, and identify and display the angle data of the angle sensor and the temperature data of the constant temperature oil tank.

[0010] The angle sensor comprises a rotor and a stator. The rotor is fixed on the rotating shaft and rotates synchronously with the rotating shaft. The stator is fixed on the upper part of the rotor. The angle sensor adopts a magnetic angle sensor, a grating angle sensor or other high-precision angle sensors.

[0011] The temperature measuring component includes a temperature sensing element, a capillary and an elastic element. The temperature sensing element is immersed in the heat-conducting medium of the constant temperature oil tank. The temperature sensing element is connected to the elastic element through the capillary. The closed system composed of the temperature sensing element, the capillary and the elastic element is filled with the temperature sensing medium. The elastic element is fixedly connected to the rotating shaft. When the temperature sensing medium in the temperature sensing element senses the temperature change, it triggers the pressure or volume change of the working material in the temperature sensing element. After the change is transmitted through the capillary, the pressure or volume of the temperature sensing medium of the elastic element changes, so that the elastic element is deformed to generate a rotational force and drive the rotating shaft to rotate. At the same time, the rotating shaft drives the rotor in the angle sensor to rotate and output angle data.

[0012] The present invention provides a method for processing a transformer thermometer dial, using the above-mentioned intelligent manufacturing device, and comprising the following steps:

[0013] S1. Start the host computer collaborative control software: configure and start the host computer collaborative control software in the host computer. The control software can realize the temperature control of the constant temperature oil tank, the angle sensor, the laser engraving machine, and the dial by inputting the basic information of the constant temperature oil tank, the angle sensor, the angle information collection and calculation, the dial image generation, and the positioning and processing functions of the laser engraving machine;

[0014] S2. Run the intelligent production device: The central processor receives the process start information of the host computer collaborative control software, and then sends control signals to the constant temperature oil tank, angle sensor, and laser engraving machine according to the processing flow, and receives relevant information about the process execution process, including:

[0015] (1) The central processing unit sends control information to the heating module or cooling module of the constant temperature oil tank. The heating module or cooling module starts and heats or cools the constant temperature oil tank. At the same time, the stirring device is turned on to achieve uniform flow of the heat transfer medium. The real-time temperature data of the constant temperature oil tank is collected through the temperature sensor. When the temperature of the constant temperature oil tank reaches the test temperature point T℃, the heating or cooling is stopped;

[0016] (2) The temperature sensing medium in the temperature sensing element of the temperature measuring component senses the temperature change, which causes the pressure or volume change of the working material in the temperature sensing element. This change causes the elastic element to deform and drives the angle sensor to output an angle sensing signal through the rotating shaft. The central processor receives the angle data of multiple angle sensors in real time;

[0017] S3, generating a scaled disk image: the central processing unit collects, stores and filters the constant temperature oil tank temperature data that meets the conditions, and the angle data given by the corresponding angle sensor, and then generates a scaled disk image used in conjunction with the laser engraving machine according to the shape and size information of the to-be-processed scaled disk entered in advance and the processing size and precision of the laser engraving machine;

[0018] S4. Make a high-precision dial: Place the dial in the processing position. The laser engraving machine will accurately position the engraving knife and the dial according to the image of the dial with scale generated by the central processor and then engrave until the production of the transformer thermometer dial is completed.

[0019] In step S1, the host computer collaborative control software is a control program developed according to processing requirements and capable of generating a scaled dial image. The basic information of the scaled dial, constant temperature oil tank, and angle sensor input includes: the operating temperature range of the constant temperature oil tank, heating power and time, stirring speed, shape and size of the rotating shaft, type and specification of the angle sensor, shape and size of the scaled dial to be processed, and processing size and precision of the laser engraving machine.

[0020] In step S1, the lower limit working temperature of the constant temperature oil tank is lower than the lower limit of the thermometer range, and the upper limit working temperature is higher than the upper limit of the thermometer range. The host computer collaborative control software can arbitrarily set the number and value of temperature points T within the working temperature range of the constant temperature oil tank, and set the stabilization time t value corresponding to the temperature point T.

[0021] In step S2, the host computer collaborative control software controls the constant temperature oil tank to automatically increase or decrease the temperature within the working temperature range and read the data of the angle sensor under stable conditions, including heating or cooling to the next temperature point after the test temperature point T℃ is stabilized for t minutes, and automatically reading the angle data output by the angle sensor through a digital signal or an analog signal within a period of time after a set test temperature point T℃ is stabilized for t minutes, and storing the collected angle data in the computer for easy query, traceability and export.

[0022] In step S3, the scale image generation method includes: (1) obtaining α1 to α2 according to the measured angle values; n The angle of rotation is obtained by linear interpolation to obtain the angle value corresponding to the minimum division value, and the linear scale image is automatically generated; 2) The angle value corresponding to the minimum division value is obtained by arithmetic difference to automatically generate a nonlinear scale image; (3) The angle value corresponding to the minimum division value is obtained by geometric ratio to automatically generate a nonlinear scale image.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention can accurately read the angle value of the pointer thermometer, avoid the influence of human factors, and greatly improve the production efficiency by reading the angle values ​​of multiple pointer thermometers at one time. In addition, all angle data can be stored and exported, which is convenient for traceability, easy to use, safe and reliable;

[0025] 2. The present invention automatically controls the temperature rise and fall of the constant temperature oil tank, freeing up manpower. In the upper computer collaborative control software, the test temperature point, stabilization time, and deviation range of the constant temperature oil tank are precisely controlled, thereby improving the accuracy and reliability of the temperature data.

[0026] 3. Based on the acquired angle data and temperature data, combined with the shape and size of the scale plate to be processed, and the processing size and precision of the laser engraving machine, the present invention can accurately generate a linear or nonlinear scale plate image, thereby improving the precision and efficiency of the laser engraving machine in making different types of scale plates;

[0027] 4. The present invention realizes customized processing of high-precision dials, and the pointer thermometer produced has more accurate indication, effectively avoiding human errors;

[0028] 5. The invention has reasonable design, convenient use, high working efficiency, safety and reliability. The processing method provided also has the advantages of easy operation, stable process and good product quality, which provides convenience for industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1A schematic diagram of a dial structure for piecewise linearization customization by manually reading four rotation angles (α1, α2, α3 and α4) in the prior art;

[0030] Figure 2 It is a structural schematic diagram of an intelligent manufacturing device for a transformer thermometer dial of the present invention;

[0031] Figure 3 This is a diagram of the installation structure of the angle sensor device and the temperature measurement component in the present invention;

[0032] In the figure: 1-constant temperature oil tank, 2-pointer thermometer assembly, 2-1-temperature sensing element, 2-2-capillary, 2-3-elastic element, 2-4-rotating shaft, 3-angle sensor, 3-1-rotor, 3-2-stator, 4-angle signal transmission cable, 5-host computer, 6-signal control cable, 7-laser engraving machine, 8-dial, 9-constant temperature oil tank control cable. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0034] like Figure 2 and Figure 3 As shown, the present invention provides an intelligent manufacturing device for a transformer thermometer dial, comprising a constant temperature oil tank 1, a temperature measuring component, an angle sensor device, a host computer 5 and a laser engraving machine 7, wherein the number of the angle sensor devices is one or more, and the angle sensor device comprises a rotating shaft 2-4 and an angle sensor 3 integrally installed in a pointer thermometer component 2, the temperature sensing element of the temperature measuring component is immersed in the constant temperature oil tank 1 and connected to the rotating shaft 2-4 of the angle sensor device, the angle sensor 3 is connected to the host computer 5 via an angle signal transmission cable 4, and the temperature sensing element of the temperature measuring component After sensing the temperature of the constant temperature oil tank 1, the elastic element 2-3 is driven to rotate and the rotating shaft 2-4 is driven to rotate. The rotating shaft 2-4 outputs angle data by driving the angle sensor 3 to rotate. The constant temperature oil tank 1 is connected to the host computer 5 through the constant temperature oil tank 1 control cable 9. The host computer 5 is connected to the laser engraving machine 7 through the signal control cable 6. The host computer 5 collects the temperature data of the constant temperature oil tank 1 and the angle data of the angle sensor 3, and generates the dial image and scale position in combination with the shape and size of the dial 8, and then the laser engraving machine 7 realizes high-precision processing of the dial 8.

[0035] Furthermore, the pointer thermometer assembly 2 includes a housing, a panel with scales, and a pointer. The housing is provided with a panel with scales, the middle of the panel is provided with a pointer and a rotating shaft 2-4, and the rotating shaft 2-4 is provided with an angle sensor 3. It is understandable that the rotating shaft 2-4 and the angle sensor 3 of the angle sensing device may not be installed in the pointer thermometer assembly 2, and may be used separately on the basis of other stable installations.

[0036] Furthermore, the constant temperature oil tank 1 includes a temperature sensor, a working oil chamber, a stirring device, a heating device and a cooling device. The working oil chamber is filled with a heat-conducting medium. The temperature sensor, the stirring device, the heating device and the cooling device are all installed in the working oil chamber. The temperature sensor adopts a high-reliability and high-precision temperature sensor, which can transmit the temperature of the heat-conducting medium of the constant temperature oil tank 1 (as a standard temperature) to the host computer 5 in real time through the signal transmission line. The heating device receives the working instructions of the host computer 5 and maintains the temperature of the heat-conducting medium in the working oil chamber stable together with the stirring device and the cooling device. In a specific implementation, the heat-conducting medium is usually silicone oil, the stirring device is a structure in which a motor drives the stirring assembly, and the cooling device can adopt a fan or other refrigeration device.

[0037] Furthermore, the host computer 5 includes a central processing unit, an input and display device, and the central processing unit is used to collect and output various control signals related to the constant temperature oil tank 1 and the angle sensor device, and convert analog signals into digital signals, as well as communicate with the touch computer, send detection information and receive detection results; the input and display device is used to receive basic information of the constant temperature oil tank 1, the angle sensor 3, the laser engraving machine 7, and the dial 8, and identify and display the angle data of the angle sensor 3 and the temperature data of the constant temperature oil tank 1.

[0038] Furthermore, the angle sensor 3 includes a rotor 3-1 and a stator 3-2. The rotor 3-1 is fixed to the rotating shaft 2-4 by screws and rotates synchronously with the rotating shaft 2-4. The stator 3-2 is fixed on the upper part of the rotor 3-1. The angle sensor 3 adopts a magnetic angle sensor, a grating angle sensor or other high-precision angle sensor.

[0039] Furthermore, the temperature measuring component includes a temperature sensing element 2-1, a capillary 2-2 and an elastic element 2-3. The temperature sensing element 2-1 adopts a temperature bag and is immersed in the heat-conducting medium of the constant temperature oil tank 1. The temperature sensing element 2-1 is connected to the elastic element 2-3 through the capillary 2-2. The closed system composed of the temperature sensing element 2-1, the capillary 2-2 and the elastic element 2-3 is filled with a temperature sensing medium. The elastic element is fixedly connected to the rotating shaft. Specifically, the elastic element 2-3 can adopt a multi-turn Bourdon tube, and the rotating shaft 2-4 is rigidly fixed to the center position of the elastic element 2-3. When the temperature sensing medium in the temperature sensing element 2-1 senses the temperature change, it causes the pressure or volume change of the working material in the temperature sensing element 2-1. This change is transmitted through the capillary 2-2, which causes the pressure or volume change of the temperature sensing medium of the elastic element 2-3, so that the elastic element 2-3 generates a rotational force and drives the rotating shaft 2-4 to rotate. At the same time, the rotating shaft 2-4 drives the rotor 3-1 in the angle sensor 3 to rotate and output angle data.

[0040] At the same time, the present invention also provides a method for processing a transformer thermometer dial, using the above-mentioned intelligent manufacturing device, and the specific steps are as follows:

[0041] S1. Start the host computer collaborative control software:

[0042] Configure and start the host computer collaborative control software in the host computer 5. The control software can realize the temperature control of the constant temperature oil tank 1, the angle sensor 3, the laser engraving machine 7, and the dial 8 by inputting the basic information of the constant temperature oil tank 1, the angle sensor angle information collection and calculation, the dial image generation, and the positioning and processing functions of the laser engraving machine 7;

[0043] S2. Run the intelligent production device:

[0044] The central processing unit receives the process start information of the detection host computer collaborative control software, and then sends control signals to the constant temperature oil tank 1, the angle sensor 3, and the laser engraving machine 7 according to the processing flow, and receives relevant information of the process execution process, including:

[0045] (1) The PID control module of the central processing unit sends control information to the heating module or the cooling module of the constant temperature oil tank 1, and the heating module or the cooling module starts to heat or cool the constant temperature oil tank 1, and at the same time, the stirring device is turned on to achieve uniform flow of the heat transfer medium. The real-time temperature data of the constant temperature oil tank 1 is collected through the temperature sensor. When the temperature of the constant temperature oil tank 1 reaches the test temperature point T°C, the heating or cooling is stopped. In order to keep the test temperature point T°C within the set deviation range, the central processing unit also adjusts the heating module and the cooling module in real time according to the temperature value collected by the temperature sensor, so that the test temperature point T°C (representing the temperature of the heat transfer medium in the constant temperature oil tank 1) remains stable for a certain period of time;

[0046] (2) The temperature sensing medium in the temperature sensing element 2-1 of the temperature measuring component senses the temperature change, which causes the pressure or volume change of the working material in the temperature sensing element 2-1. This change causes the elastic element 2-3 to deform and drives the angle sensor 3 to output an angle sensing signal through the rotating shaft 2-4. The central processing unit receives the angle data of multiple angle sensors 3 in real time;

[0047] S3. Generate a scale image with scale:

[0048] The central processing unit collects, stores and filters the temperature data of the constant temperature oil tank 1 that meets the conditions, as well as the angle data given by the corresponding angle sensor 3, and then generates a scaled scale image used in conjunction with the laser engraving machine 7 according to the shape and size information of the scale plate 8 to be processed that is entered in advance and the processing size and precision of the laser engraving machine 7;

[0049] S4, high-precision dial 8 is made by laser engraving machine:

[0050] The dial 8 is placed at the processing position, and the laser engraving machine 7 accurately positions the engraving knife and the dial 8 according to the scaled dial image generated by the central processor and performs engraving until the production of the transformer thermometer dial 8 is completed.

[0051] Furthermore, in the step S1, the host computer collaborative control software is a control program developed according to processing requirements and capable of generating a scaled dial image. The basic information of the scaled dial 8, the constant temperature oil tank 1, and the angle sensor 3 is input, mainly including: the working temperature range of the constant temperature oil tank 1, the test temperature point T and the stabilization time t, the heating power and time, the stirring speed, the shape and size of the rotating shaft 2-4, the type and specification of the angle sensor 3, the shape and size of the scaled dial 8 to be processed, the processing size and accuracy of the laser engraving machine 7 and other information.

[0052] Furthermore, in step S1, the lower limit working temperature of the constant temperature oil tank 1 is lower than the lower limit of the thermometer range, and the upper limit working temperature is higher than the upper limit of the thermometer range. The host computer collaborative control software can arbitrarily set the number and value of temperature points T within the working temperature range of the constant temperature oil tank 1, and set the stabilization time t value corresponding to the temperature point T.

[0053] Furthermore, in step S2, the host computer collaborative control software controls the constant temperature oil tank 1 to automatically increase or decrease the temperature within the working temperature range and read the data of the angle sensor under stable conditions, including heating or cooling to the next temperature point after the test temperature point T°C is stabilized for t minutes, and automatically reading the angle data output by the angle sensor 3 through a digital signal or an analog signal within a period of time after one of the set test temperature points T°C is stabilized for t minutes with the deviation not exceeding the set interval (the deviation range can be set in step S1), and storing the collected angle data in the computer for easy query, traceability and export.

[0054] Furthermore, in step S3, the scale image generation method includes: (1) obtaining α1 to α n The angle of rotation is obtained by linear interpolation to obtain the angle value corresponding to the minimum division value, and the linear scale image is automatically generated; 2) The angle value corresponding to the minimum division value is obtained by arithmetic difference to automatically generate a nonlinear scale image; (3) The angle value corresponding to the minimum division value is obtained by geometric ratio to automatically generate a nonlinear scale image.

[0055] In summary, the present invention first controls the temperature rise and fall of the constant temperature oil tank 1 through the host computer software and the heating and cooling modules. After the host computer software reads the angle value corresponding to a certain temperature point, it automatically controls the constant temperature oil tank 1 to heat up to another temperature point. In addition, the host computer software can read the output data of multiple angle sensors 3 at the same time, and then generate an image of the scale plate 8 with scales according to the temperature and angle data. Finally, the laser engraving machine 7 performs positioning and processing according to the image to produce a high-precision transformer thermometer scale plate 8 product.

[0056] It should be noted that the above embodiments are merely preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. All equivalent modifications made on the basis of the above embodiments belong to the protection scope of the present invention.

Claims

1. An intelligent manufacturing device for a transformer thermometer dial, characterized in that: It includes a constant temperature oil tank, a temperature measuring component, an angle sensing device, a host computer and a laser engraving machine. The number of the angle sensing devices is one or more. The angle sensing device includes an integrally installed shaft and an angle sensor. The temperature sensing element of the temperature measuring component is immersed in the constant temperature oil tank and connected to the shaft of the angle sensing device. The angle sensor is connected to the host computer through an angle signal transmission cable. The constant temperature oil tank is connected to the host computer through a constant temperature oil tank control cable. The host computer is connected to the laser engraving machine through a signal control cable.

2. The intelligent manufacturing device for transformer thermometer dial according to claim 1 is characterized in that: The constant temperature oil tank includes a temperature sensor, a working oil chamber, a stirring device, a heating device and a cooling device. The working oil chamber is filled with a heat-conducting medium. The temperature sensor, the stirring device, the heating device and the cooling device are all installed in the working oil chamber. The temperature sensor transmits the temperature of the heat-conducting medium in the constant temperature oil tank to the host computer in real time through a signal transmission line. The heating device receives the working instructions of the host computer and, together with the stirring device and the cooling device, maintains the temperature of the heat-conducting medium in the working oil chamber stable.

3. The intelligent manufacturing device for transformer thermometer dial according to claim 2 is characterized in that: The host computer includes a central processing unit and an input and display device. The central processing unit is used to collect and output various control signals related to the constant temperature oil tank and the angle sensor device, and convert analog signals into digital signals, as well as communicate with the touch computer, send detection information and receive detection results; the input and display device is used to receive basic information of the constant temperature oil tank, the angle sensor, the laser engraving machine, and the dial, and identify and display the angle data of the angle sensor and the temperature data of the constant temperature oil tank.

4. The intelligent manufacturing device for transformer thermometer dial according to claim 3 is characterized in that: The angle sensor comprises a rotor and a stator. The rotor is fixed on the rotating shaft and rotates synchronously with the rotating shaft. The stator is fixed on the upper part of the rotor. The angle sensor adopts a magnetic angle sensor or a grating angle sensor.

5. An intelligent manufacturing device for a transformer thermometer dial according to any one of claims 1 to 4, characterized in that: The temperature measuring component includes a temperature sensing element, a capillary tube and an elastic element. The temperature sensing element is immersed in the heat-conducting medium of the constant temperature oil tank. The temperature sensing element is connected to the elastic element through the capillary tube. The closed system composed of the temperature sensing element, the capillary tube and the elastic element is filled with the temperature sensing medium. The elastic element is fixedly connected to the rotating shaft. When the pressure or volume of the temperature sensing medium in the elastic element changes, the elastic element generates a rotational force and drives the rotating shaft to rotate.

6. A method for processing a transformer thermometer dial, using the intelligent manufacturing device according to claim 1, characterized in that: The steps include: S1. Start the host computer collaborative control software: configure and start the host computer collaborative control software in the host computer. The control software can realize the temperature control of the constant temperature oil tank, the angle sensor, the laser engraving machine, and the dial by inputting the basic information of the constant temperature oil tank, the angle sensor, the angle information collection and calculation, the dial image generation, and the positioning and processing functions of the laser engraving machine; S2. Run the intelligent production device: The central processor receives the process start information of the host computer collaborative control software, and then sends control signals to the constant temperature oil tank, angle sensor, and laser engraving machine according to the processing flow, and receives relevant information about the process execution process, including: (1) The central processing unit sends control information to the heating module or cooling module of the constant temperature oil tank. The heating module or cooling module starts and heats or cools the constant temperature oil tank. At the same time, the stirring device is turned on to achieve uniform flow of the heat transfer medium. The real-time temperature data of the constant temperature oil tank is collected through the temperature sensor. When the temperature of the constant temperature oil tank reaches the test temperature point T°C, the heating or cooling is stopped; (2) The temperature sensing medium in the temperature sensing element of the temperature measuring component senses the temperature change, which causes the pressure or volume change of the working material in the temperature sensing element. This change causes the elastic element to deform and drives the angle sensor to output an angle sensing signal through the rotating shaft. The central processor receives the angle data of multiple angle sensors in real time; S3, generating a scaled disk image: the central processing unit collects, stores and filters the constant temperature oil tank temperature data that meets the conditions, and the angle data given by the corresponding angle sensor, and then generates a scaled disk image used in conjunction with the laser engraving machine according to the shape and size information of the to-be-processed scaled disk entered in advance and the processing size and precision of the laser engraving machine; S4. Make a high-precision dial: Place the dial in the processing position. The laser engraving machine will accurately position the engraving knife and the dial according to the image of the dial with scale generated by the central processor and then engrave until the production of the transformer thermometer dial is completed.

7. The method for processing a transformer thermometer dial according to claim 6, characterized in that: In step S1, the host computer collaborative control software is a control program that can generate a scaled dial image, and the basic information of the scaled dial, constant temperature oil tank, and angle sensor input includes: the working temperature range of the constant temperature oil tank, heating power and time, stirring speed, shape and size of the shaft, type and specification of the angle sensor, shape and size of the scaled dial to be processed, and processing size and accuracy of the laser engraving machine.

8. The method for processing a transformer thermometer dial according to claim 7, characterized in that: In step S1, the lower limit working temperature of the constant temperature oil tank is lower than the lower limit of the thermometer range, and the upper limit working temperature is higher than the upper limit of the thermometer range. The host computer collaborative control software can arbitrarily set the number and value of temperature points T within the working temperature range of the constant temperature oil tank, and set the stabilization time t value corresponding to the temperature point T.

9. The method for processing a transformer thermometer dial according to claim 8, characterized in that: In step S2, the upper computer collaborative control software controls the constant temperature oil tank to automatically increase or decrease the temperature within the working temperature range and read the data of the angle sensor under stable conditions, including heating or cooling to the next temperature point after the test temperature point T℃ is stabilized for t minutes, and automatically reading the angle data output by the angle sensor through a digital signal or an analog signal within a period of time after a set test temperature point T℃ is stabilized for t minutes, and storing the collected angle data in the computer for easy query, traceability and export.

10. A method for processing a transformer thermometer dial according to any one of claims 6 to 9, characterized in that: In step S3, the scale image generation method includes: (1) obtaining α1 to α2 according to the measured angle values; n The angle of rotation is obtained by linear interpolation to obtain the angle value corresponding to the minimum division value, and the linear scale image is automatically generated; 2) The angle value corresponding to the minimum division value is obtained by arithmetic difference to automatically generate a nonlinear scale image; (3) The angle value corresponding to the minimum division value is obtained by geometric ratio to automatically generate a nonlinear scale image.

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