A modified tool on-line temperature measuring system for surface functional reconstruction and a temperature compensation method thereof

Abstract

The application discloses a modified tool on-line temperature measuring system for surface function reconstruction and a temperature compensation method thereof, belongs to the tool temperature measuring technical field in mechanical modification processing, and carries out real-time monitoring and feedback on processing temperature, so that error compensation is carried out on a compensation scheme of a CNC machining center spindle origin translation strategy by taking the processing temperature as a compensation signal. According to the application, the temperature data containing electrical signals collected and converted by a wireless temperature monitoring module in the modified tool are taken as input, the signals are input into a single-chip microcomputer system, the modified processing thermal error amount of the CNC machining center is obtained through single-chip microcomputer calculation, the obtained modified processing thermal error amount is taken as an original compensation signal, the original compensation signal is sent to a CNC machining center controller through an I / O port line, the CNC system spindle reference origin is offset according to the principle of the CNC machining center origin translation method, and the offset is added to a control signal of a servo loop to realize the compensation of the processing thermal error amount of the CNC machining center spindle, so that the processing precision of the modified tool of the CNC machining center and the surface performance of the modified part are ensured.

Description

Technical Field

[0001] This invention belongs to the field of tool temperature measurement technology in machining, specifically relating to an online temperature measurement system and temperature compensation method for modified tools used in surface function remanufacturing. Background Technology

[0002] With the rapid development of modern machining technology, the requirements for machining accuracy and surface performance of parts are becoming increasingly stringent, demanding ever-higher machining precision from CNC machining centers. Among the various machining errors in the entire machining process, machining thermal error accounts for the largest proportion, exceeding 50%. Therefore, the measurement and control of modification temperature is extremely important in the machining process, and modification temperature is also a crucial state parameter for controlling the modification process and tool condition. For high-speed rotating spindles in machining, traditional tool temperature measurement technology suffers from drawbacks such as difficult wiring and excessively long response time of temperature sensing elements, making it difficult to accurately detect tool modification temperature in real time.

[0003] Compared to traditional CNC machining, surface micro / nano modification technology, which combines surface engineering with CNC machining, is considered one of the key technologies of the 21st century. Surface engineering technology uses physical and chemical methods to pretreat material surfaces, aiming to improve surface properties and enhance the structure and chemical characteristics of the transitional microstructure at a certain thickness from the matrix to the material surface. For example, in preparing ceramic structures on a metal substrate, different thicknesses of functional phases can be machined using different modified tooling parameters, thus meeting the surface performance requirements such as drag reduction, wear resistance, and corrosion resistance.

[0004] Ball-end modified cutting tools are a traditional type of CNC machining tool. Due to the easy wear of the tool surface and the high rotation speed of the tool during machining, coupled with the high-frequency ultrasonic action, the tool tip generates a lot of heat and wear during machining, which can easily cause thermal deformation of the modified tool, resulting in machining thermal errors. This phenomenon inevitably leads to frequent tool replacements, low efficiency of single tool modification, and complex processes. Moreover, frequent tool replacements and thermal errors generated during tool modification can easily lead to problems such as decreased machining accuracy and uneven machining functions of parts. As a result, the material surface cannot form a homogeneous transitional stepped material structure, and it is impossible to achieve the requirements of significantly improving the surface properties such as drag reduction, wear resistance, and corrosion resistance. Summary of the Invention

[0005] This invention provides an online temperature measurement system and temperature compensation method for modified cutting tools used in surface functional reconstruction. It can monitor the temperature changes during the tool modification process in real time, and eliminate the processing thermal error through thermal compensation, thereby improving the processing accuracy and surface performance of the parts.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An online temperature measurement system for modified cutting tools used in metal surface functional reconstruction includes: a modified cutting tool, a wireless temperature monitoring module, a thermocouple, a temperature compensation device, and a CNC machining center (Computer Numerical Control Machining Center); the thermocouple and the wireless temperature monitoring module are installed in the modified cutting tool, and the thermocouple transmits the thermoelectric potential measured to the wireless temperature monitoring module.

[0008] The wireless temperature monitoring module integrates a temperature data acquisition module, a signal conversion module, a wireless transmission module, and a power supply module. The temperature data acquisition module is responsible for acquiring the thermoelectric potential measured by the thermocouple and transmitting the acquired thermoelectric potential to the signal conversion module. The signal conversion module converts the thermoelectric potential into a wireless signal and then transmits the converted wireless signal to the wireless transmission module, which then sends it to the temperature compensation module. The power supply module provides energy to the above three modules.

[0009] The wireless temperature monitoring module sends temperature data to the temperature compensation module, which calculates the thermal error of the modified machining and outputs it as the original compensation signal to the CNC machining center. Based on the principle of origin translation, the reference origin of the CNC system is changed by the existing external coordinate system origin offset function in the CNC and added to the control signal of the servo loop to realize the compensation of the thermal error of the modified machining of the CNC machining center spindle.

[0010] In the structure described above, a locking device is provided between the modified cutter head and the cutter handle. The locking device includes a mating slot at the upper end of the modified cutter head and a cutter insertion and locking switch at the lower end of the cutter handle. The modified cutter head and the cutter handle are fixed by the locking device.

[0011] The locking switch includes a pin, an axial spring, a slider, and a radial spring. The stiffness coefficient of the radial spring must be greater than that of the axial spring. In the locked state, the radial spring provides elastic force to the slider, forcing the pin to press down and restricting the displacement of the insert and the docking bayonet. In the tool changing state, the slider and the radial spring are compressed, and the axial spring acts to move the slider upward, releasing the restriction and completing the tool changing.

[0012] The modified cutter head and the cutter shank have a hinge hole inside, and a thermocouple insulating copper wire is arranged in the hinge hole; the thermocouple insulating copper wire is connected from the bottom of the modified cutter head to the thermocouple terminal at the top of the cutter shank, and the thermocouple is fixed to the rotation center of the cutter body through a limiting hole.

[0013] The modified cutter head has a hemispherical shape at the bottom end. The modified cutter head has a stepped reamed hole inside. The large hole of the stepped reamed hole is equipped with a thermocouple insulating copper wire, and the small hole of the stepped reamed hole is a through hole. The insulating copper wire extends to the end of the small hole of the stepped reamed hole to contact the surface of the object being tested.

[0014] The top of the tool handle is provided with a sleeve rod, and the tool handle and the sleeve rod are fixed by a spring collet. After the spring collet and the tool handle are assembled, the tool handle is fixed by a preload. The lower end of the spring collet has an annular limiting groove, which is locked and fixed to the annular flange at the bottom of the sleeve rod. The top of the sleeve rod is connected to a protective cover, and a wireless temperature monitoring module is fixed inside the protective cover. The wireless temperature monitoring module is fixed inside the protective cover by screws, and the wires of the wireless temperature monitoring module are connected to a thermocouple. The thermocouple passes through the round hole in the bottom plate of the protective cover and connects to the terminal block. After measuring the thermoelectric potential, it is transmitted to the wireless temperature monitoring module, and the wireless temperature monitoring module sends the temperature data to the temperature compensation module.

[0015] A temperature compensation method for an online temperature measurement system of modified cutting tools used for surface functional remanufacturing includes the following steps:

[0016] The electrical signal containing temperature data emitted by the wireless temperature monitoring module is input into the microcontroller system. The microcontroller then calculates the thermal error of the modified cutting tool in the CNC machining center. The calculation process is as follows:

[0017] The machining thermal error of modified tools in CNC machining centers is the dimensional error caused by thermal deformation and thermal expansion due to the heat generated during the modification process. The calculation formula can be determined according to specific circumstances. Here, due to the simplicity of the modified tool and the characteristics of the modification process, a simplified mathematical model is used to estimate the machining thermal error. Common simplified model methods include the material's line heat source model and surface heat source model. By considering parameters such as temperature distribution and thermal deformation in the modified region, the machining thermal error is calculated.

[0018] When using the simplified model method to calculate the machining thermal error of modified tools, the following formula can be used:

[0019] 1. Line heat source model:

[0020] Processing thermal error = α × (modification temperature - ambient temperature)

[0021] Where α is the linear thermal expansion coefficient of the material, the modification temperature is the temperature generated during processing, and the ambient temperature is the ambient temperature before processing.

[0022] 2. Surface heat source model:

[0023] Processing thermal error = α × ΔT × L

[0024] Where α is the linear thermal expansion coefficient of the material, ΔT is the temperature increment of the modified region, and L is the length of the modified region.

[0025] The above formula is derived based on simplifying assumptions and is only applicable to certain specific processing conditions. In practical applications, factors such as modification rate, modification thickness, and modification depth should be considered for correction and adjustment.

[0026] Common correction calculation formulas include the modification rate correction method and the modification thickness correction method.

[0027] Since the modification rate and modification thickness will change during actual processing, the influence of modification rate and modification thickness on processing thermal error should be comprehensively considered, along with factors such as material properties and ultrasonic vibration. The following formula can be used for correction:

[0028] Processing thermal error Δ=α×ΔT av ×(L-γ×t)×(1+β×v)×(1+δ×ω)

[0029] Where α is the linear thermal expansion coefficient of the tool material, ΔT av γ is the average temperature increment of the modified region, L is the length of the modified region, γ is the temperature correction coefficient for the tool material, t is the modified thickness, β is the ultrasonic vibration temperature correction coefficient for the tool material, v is the modification speed, δ is the ultrasonic vibration temperature correction coefficient for the tool material, and ω is the ultrasonic vibration frequency.

[0030] Based on the ΔT established above av The machining thermal error Δ is calculated using a model. Based on the principle of origin translation, the machining thermal error Δ is used as the original compensation signal and sent to the CNC machining center controller through the I / O port. Then, the reference origin of the CNC system is changed by the coordinate origin translation function in the CNC machining center and added to the control signal of the servo loop to realize the machining thermal error compensation of the CNC machining center spindle. This compensates for the modified thermal error generated by the CNC machining center, ensuring the modification accuracy of the CNC machining center and the surface performance of the modified parts.

[0031] Beneficial effects: This invention provides an online temperature measurement system and temperature compensation method for modified cutting tools used in surface functional reconstruction, which has the following advantages compared with the prior art:

[0032] The design parameters of the modified tool are determined according to the surface engineering requirements, which makes the types of modified parts more diverse. Different modified parts are adapted to tool holders through locking mechanisms to form different modified tools, which improves the flexibility of surface engineering and machining.

[0033] The locking nut and the modified cutter head form an interlocking connection to increase friction, which can prevent loosening while ensuring coaxiality and the stability of the cutter under high-speed rotation.

[0034] The processing temperature is monitored and fed back in real time. Using this as a compensation signal, the CNC machining center adopts an origin translation strategy to compensate for the thermal error of the modified processing. The thermal error of the modified processing is eliminated through thermal compensation, thereby improving the processing accuracy and surface performance of the modified parts. Attached Figure Description

[0035] Figure 1 This is a perspective cross-sectional view of the online temperature-measuring modified tool structure in an embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of the locking device structure in an embodiment of the present invention;

[0037] Figure 3 This is a top view of the wireless temperature monitoring module in an embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of a microcontroller-based spindle thermal error compensation scheme in an embodiment of the present invention;

[0039] In the diagram, 1 is the modified cutter head, 11 is the docking bayonet, 2 is the stepped reaming hole, 3 is the thermal resistance insulating copper wire, 4 is the cutter handle, A is the locking device, 41 is the locking switch, 42 is the insert, 411 is the pin, 412 is the axial spring, 413 is the slider, 414 is the radial spring, 5 is the spring collet, 6 is the thermocouple terminal, 7 is the sleeve rod, 8 is the thermocouple, 9 is the protective cover limiting hole, 10 is the wireless temperature monitoring module, 11 is the screw, and 12 is the protective cover. Detailed Implementation

[0040] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0041] like Figure 1As shown, a replaceable-head type continuous temperature measuring modified tool includes a modified tool head 1, a tool holder 4, and a locking device A located between the tool holder and the modified tool head. The locking device A includes a mating slot 11 at the upper end of the modified tool head, a locking switch 41 and a insert 42 at the lower end of the tool holder. The locking switch 41 includes a pin 411, an axial spring 412, a slider 413, and a radial spring 414. The stiffness coefficient of the radial spring 414 must be greater than that of the axial spring. The stiffness coefficient of spring 412 is such that, in the locked state, radial spring 414 provides elastic force to slider 413, forcing the pin to press down and limiting the displacement of insert 42 and docking bayonet 11. In the tool changing state, slider 413 and radial spring 414 are compressed, and axial spring 412 acts to move pin 411 upward, releasing the restriction and completing the tool changing. The modified tool head and tool holder 4 have a hinge hole 2 at their rotation center, and thermocouple insulating copper wire 3 is arranged in the hinge hole 2; a thermocouple terminal 6 is connected to the top of the tool holder 4; modified The cutting head 1 is machined with a hemispherical modified cutting head. A stepped reaming hole 2 is opened at the center of rotation of the modified cutting head 1. The larger hole of the stepped reaming hole 2 is arranged with thermocouple insulating copper wire 3. The smaller stepped hole is a through hole. The insulating copper wire 3 extends to the end of the smaller stepped hole to contact the surface of the object being measured. After the spring collet 5 is assembled with the tool holder 4, the tool holder 4 is fixed by pre-tightening force. The lower end of the spring collet 5 is provided with an annular limiting groove, which is clamped and fixed with the bottom annular flange of the sleeve 7. The bottom of the sleeve 7 is fixed with the spring collet 5, and the top is fixed with the protective cover 12 by threaded connection. A wireless temperature monitoring module 10 is fixed inside the protective cover 12. The wireless temperature monitoring module 10 is fixed to the protective cover 12 by screws 11. The wires of the wireless temperature monitoring module 10 are connected to the thermocouple 8. The thermocouple 8 passes through the round hole 9 of the bottom plate of the protective cover 12 and connects to the terminal 6. After measuring the thermoelectric potential, it is transmitted to the wireless temperature monitoring module 10. The wireless temperature monitoring module 10 sends the temperature data to the temperature compensation module.

[0042] After mechanical grinding, polishing, and ultrasonic cleaning, the modified cutter head 1 is placed in a composite plating equipment to prepare a wear-resistant coating for the cutter. In the working state, the modified cutter head 1 and the cutter shank 3 form a top-locking system to maintain the stability of the cutter head. In the non-working state, it can be disassembled and replaced normally. Thermocouple 8 passes through the round hole 9 in the bottom plate inside the protective cover 12 and is connected to the terminal 6. It receives the electrical signal of the insulated copper wire 3 and transmits it to the wireless temperature monitoring module 10 through the wire.

[0043] The wireless temperature monitoring module 10 integrates a temperature data acquisition module, a signal conversion module, a wireless transmission module, and a power supply module. All modules are connected by circuits and wirelessly connected to a temperature compensation module. The wireless temperature monitoring module 10 can transmit continuous temperature data in real time. The thermocouple acquires the thermoelectric potential and transmits it to the temperature data acquisition module. The temperature data acquisition module is responsible for acquiring and filtering the thermoelectric potential measured by the thermocouple, and then transmitting the acquired thermoelectric potential through a circuit to the signal conversion module. The signal conversion module modulates and converts the input signal, and then transmits it through a circuit to the wireless transmission module, which then transmits it to the wireless receiving module in the temperature compensation module. The power supply module provides energy to the three modules mentioned above.

[0044] Modified processing thermal error compensation

[0045] Because the surface of this type of modified cutting tool is prone to wear, and due to the high rotation speed of the tool during the modification process, coupled with the high-frequency ultrasonic action, the cutting head generates a large amount of heat and experiences significant wear during processing. This easily leads to thermal deformation and expansion of the cutting tool, resulting in machining thermal errors. Therefore, this phenomenon inevitably leads to frequent tool changes throughout the entire processing, resulting in low processing efficiency for individual tools, complex processes, and frequent tool changes. Furthermore, the thermal errors generated during tool processing can easily lead to decreased machining accuracy and uneven machining properties, preventing the formation of a homogeneous transitional stepped material structure on the material surface. This hinders the achievement of significantly improved surface properties such as drag reduction, wear resistance, and corrosion resistance. Therefore, it is necessary to compensate for the thermal errors generated during the modification tool processing. After comparing various temperature compensation strategies, the origin translation strategy showed good stability and low cost, and was thus selected as the compensation strategy.

[0046] Calculation of thermal error in modified processing

[0047] The machining thermal error of modified tools in CNC machining centers is the dimensional error caused by thermal deformation and thermal expansion due to the heat generated during the modification process. The calculation formula can be determined according to specific circumstances. Here, due to the simplicity of the modified tool and the characteristics of the modification process, a simplified mathematical model is used to estimate the machining thermal error. Common simplified model methods include the material's line heat source model and surface heat source model. By considering parameters such as temperature distribution and thermal deformation in the modified region, the amount of machining thermal error is calculated. The calculation process is as follows:

[0048] When using the simplified model method to calculate the thermal error of modified CNC machining center tools, the following formula can be used:

[0049] 1. Line heat source model:

[0050] Processing thermal error = α × (modification temperature - ambient temperature)

[0051] Where α is the linear thermal expansion coefficient of the material, the modification temperature is the temperature generated during processing, and the ambient temperature is the ambient temperature before processing.

[0052] 2. Surface heat source model:

[0053] Processing thermal error = α × ΔT × L

[0054] Where α is the linear thermal expansion coefficient of the material, ΔT is the temperature increment of the modified region, and L is the length of the modified region.

[0055] The above formula is derived based on simplifying assumptions and is only applicable to certain specific processing conditions. In practical applications, factors such as modification rate, modification thickness, and modification depth should be considered for correction and adjustment.

[0056] Common correction formulas include modification rate correction methods and modification thickness correction methods. Since both modification rate and modification thickness change during actual processing, the influence of modification rate and thickness on processing thermal errors should be comprehensively considered, along with factors such as material properties and ultrasonic vibration. Therefore, the following formula is used for correction:

[0057] Modification processing thermal error Δ=α×ΔT av ×(L-γ×t)×(1+β×v)×(1+δ×ω)

[0058] Where α is the linear thermal expansion coefficient of the tool material, ΔT av γ is the average temperature increment of the modified region, L is the length of the modified region, γ is the temperature correction coefficient for the tool material, t is the modified thickness, β is the ultrasonic vibration temperature correction coefficient for the tool material, v is the modification speed, δ is the ultrasonic vibration temperature correction coefficient for the tool material, and ω is the ultrasonic vibration frequency.

[0059] The modified processing thermal error can be calculated using the above-mentioned corrected formula.

[0060] Origin translation strategy

[0061] The origin translation strategy involves using computers or compensation systems to calculate the thermal error of the modified machining process in the CNC machining center and then compensating for the error, based on the established ΔT... avThe modified machining thermal error Δ is calculated using a model. Based on the origin translation method, the thermal error Δ is used as the initial compensation signal and sent to the CNC controller via I / O ports. Then, the reference origin of the spindle tool in the CNC system is changed using the existing external coordinate system origin offset function, and this change is added to the control signal of the servo loop to achieve thermal error compensation for the modified machining of the CNC machining center spindle tool. This ensures the modified machining accuracy of the CNC machining center and the surface properties of the modified parts.

[0062] Thermal error compensation in modified machining is primarily achieved by compensating for the thermal error with a motion on the CNC machining center that is the same magnitude but opposite in direction. Based on this principle, an origin translation strategy is employed to compensate for the error in the CNC machining center. The compensation scheme involves real-time compensation of the CNC machining center's spindle coordinates based on real-time feedback of the tool's modified machining temperature. Specifically, an electrical signal carrying temperature data from a wireless temperature monitoring module is input to a microcontroller system. The microcontroller calculates the thermal error amount in the modified machining process and uses this calculated thermal error as a compensation signal. This compensation signal is sent to the CNC machining center controller via I / O lines. The system coordinates are then adjusted accordingly using the CNC machining center's origin translation function, and the corresponding adjustments to the CNC machining center's spindle are achieved through control signals from the servo system. The detailed compensation scheme is as follows:

[0063] The entire modified tool temperature compensation system mainly consists of three parts: a wireless temperature monitoring module, a temperature compensation module, and a CNC machining center. The temperature data signal collected, modulated, and converted in the wireless temperature monitoring module is transmitted via a wireless transmitter to a wireless receiver in the temperature compensation module. The signal is then transmitted to the microcontroller system via a 0-5V DC signal. The microcontroller's A / D converter samples and filters the received DC signal, converting it into a digital signal. This digital signal is then transmitted to the CPU in the microcontroller for calculating the thermal error during the modification process. Based on parameters such as temperature change and thermal deformation in the modified area, and considering factors such as modification speed, modification thickness, material properties, and ultrasonic vibration, the following formula is used for correction: Thermal error Δ = α × ΔT av ×(L-γ×t)×(1+β×v)×(1+δ×ω), (where α is the linear thermal expansion coefficient of the tool material, ΔT) avThe machining thermal error Δ is calculated by taking the average temperature increment of the modified region, L as the length of the modified region, γ as the temperature correction coefficient for the tool material, t as the modified thickness, β as the ultrasonic vibration temperature correction coefficient for the tool material, v as the modification speed, δ as the ultrasonic vibration temperature correction coefficient for the tool material, and ω as the ultrasonic vibration frequency. The calculated machining thermal error Δ signal is output through the COM output port and then output as the original compensation signal to the CNC machining center through the I / O port. Based on the principle of origin translation, the reference origin of the CNC system is changed by the existing external coordinate system origin offset function in the CNC and added to the control signal of the servo loop to realize the machining thermal error compensation of the CNC machining center spindle. Through the above method, the spatial position of the tool in the machining center is finely adjusted, thereby compensating for the machining thermal error generated during the modification machining of the CNC machining center, ensuring the modification machining accuracy of the CNC machining center and the surface performance of the modified parts.

[0064] The above embodiments are merely illustrative of preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solutions based on the technical concepts proposed in this invention shall fall within the scope of protection of this invention.

Claims

1. A temperature compensation method for an online temperature measurement system of modified cutting tools used for surface functional remanufacturing, characterized in that, Includes the following steps: The electrical signal containing temperature data emitted by the wireless temperature monitoring module is input to the temperature compensation module to calculate the thermal error of the modified machining of the CNC machining center. Based on the principle of origin translation, the machining thermal error is sent as the original compensation signal to the CNC controller via the I / O port. Then, the CNC system's reference origin is changed through the coordinate origin translation function and added to the servo loop control signal to compensate for the machining thermal error of the CNC machining center spindle. This compensates for the machining thermal error generated during modification machining, ensuring the machining accuracy and surface properties of the machined parts. Since the modification speed and thickness change during actual machining, considering the influence of modification speed and thickness on machining thermal error, as well as the effects of material and ultrasonic vibration, the following formula is used for correction: Processing thermal error Δ=α×ΔT av ×(L-γ×t)×(1+β×v)×(1+δ×ω) Where α is the linear thermal expansion coefficient of the tool material, ΔT av γ is the average temperature increment of the modified region, L is the length of the modified region, γ is the temperature correction coefficient for the tool material, t is the modified thickness, β is the ultrasonic vibration temperature correction coefficient for the tool material, v is the modification speed, δ is the ultrasonic vibration temperature correction coefficient for the tool material, and ω is the ultrasonic vibration frequency.

2. The online temperature measurement system for modified cutting tools used in surface functional remanufacturing as described in claim 1, characterized in that, include: The tool includes a modified cutting tool, a wireless temperature monitoring module, a thermocouple, a temperature compensation device, and a CNC machining center. The thermocouple and the wireless temperature monitoring module are installed in the modified cutting tool. The thermocouple measures the thermoelectric potential and transmits it to the wireless temperature monitoring module. The wireless temperature monitoring module sends temperature data to the temperature compensation module. The temperature compensation module calculates the thermal error of the modified machining and sends it to the CNC machining center. The CNC machining center issues a corresponding control signal to adjust the spatial position of the CNC machining center spindle.

3. The online temperature measurement system for modified cutting tools used in surface functional remanufacturing according to claim 2, characterized in that, The wireless temperature monitoring module integrates a temperature data acquisition module, a signal conversion module, a wireless transmission module, and a power supply module. The temperature data acquisition module is responsible for acquiring the thermoelectric potential measured by the thermocouple and transmitting the acquired thermoelectric potential to the signal conversion module. The signal conversion module converts the thermoelectric potential into a wireless signal and then transmits the converted wireless signal to the wireless transmission module, which then sends it to the temperature compensation module. The power supply module provides energy to the temperature data acquisition module, the signal conversion module, and the wireless transmission module.

4. The online temperature measurement system for modified cutting tools used in surface functional remanufacturing according to claim 2, characterized in that, The modified cutting tool has a reaming hole inside, and a thermocouple insulating copper wire is arranged in the reaming hole. The thermocouple insulating copper wire is connected from the bottom of the modified cutting tool to the thermocouple terminal at the top. The thermocouple is fixed to the rotation center of the entire cutting tool through a limiting hole. A modified cutting head is provided at the bottom end of the modified cutting tool. A stepped reaming hole is provided inside the modified cutting head. The thermocouple insulating copper wire is arranged in the large hole of the stepped reaming hole, and the stepped small hole is a through hole. The insulating copper wire extends to the end of the stepped small hole to contact the surface of the object being measured.

5. The online temperature measurement system for modified cutting tools used in surface functional remanufacturing according to claim 2, characterized in that, The modified cutting tool consists of a modified tool holder and a modified cutting head. A locking device is provided between the modified cutting head and the tool holder. The locking device includes a mating slot at the upper end of the modified cutting head and a tool insert and locking switch at the lower end of the tool holder. The modified cutting head and the tool holder are fixed by the locking device.

6. The online temperature measurement system for modified cutting tools used in surface functional remanufacturing according to claim 5, characterized in that, The locking switch includes a pin, an axial spring, a slider, and a radial spring. The stiffness coefficient of the radial spring must be greater than that of the axial spring. In the locked state, the radial spring provides elastic force to the slider, forcing the pin to press down and restricting the displacement of the insert and the docking bayonet. In the tool changing state, the slider and the radial spring are compressed, and the axial spring acts to move the pin upward, releasing the restriction and completing the tool changing.

7. The online temperature measurement system for modified cutting tools used in surface functional remanufacturing according to claim 5, characterized in that, The top of the knife handle is provided with a sleeve rod, and the knife handle and the sleeve rod are fixed by a spring collet. After the spring collet is assembled with the knife handle, the knife handle is fixed by a preload. The lower end of the spring collet is provided with an annular limiting groove, which is clamped and fixed to the annular flange at the bottom of the sleeve rod. The top of the sleeve rod is connected to a protective cover, and a wireless temperature monitoring module is fixed inside the protective cover.

8. The online temperature measurement system for modified cutting tools used in surface functional remanufacturing according to claim 7, characterized in that, The wireless temperature monitoring module's wires are connected to a thermocouple; the thermocouple passes through the base plate of the protective cover and connects to the terminal block.

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