Distributed air-cooled uniform temperature plate numerical control machine tool temperature control system and method

Abstract

This invention belongs to the field of thermal management for CNC machine tools, specifically relating to a distributed air-cooled vapor chamber CNC machine tool temperature control system and method. It aims to solve the problems of difficult coordinated adjustment of heat dissipation from different parts and delayed temperature control response under conditions of multiple heat sources dispersed in time and space. The invention includes: multiple air-cooled vapor chamber heat dissipation units, a temperature monitoring unit, and a control unit. Based on temperature data, heat source power data, cold source power data, and a deformation calculation model, it determines the subsequent thermal deformation state and accordingly determines the distribution of cooling capacity to different parts requiring temperature control. This invention enables distributed predictive temperature control, suppresses thermally induced deformation of structural components, and improves the thermal accuracy and stability of CNC machine tools.

Description

Technical Field

[0001] This invention belongs to the field of CNC machine tool thermal management technology, specifically relating to a distributed air-cooled heat exchanger CNC machine tool temperature control system and method. Background Technology

[0002] CNC machine tools are subjected to the combined effects of multiple heat sources during operation, including spindle heating, motor heating, frictional heating from moving parts, and ambient heat sources. These heat sources are located in different spatial positions within the CNC machine tool, and their heating states change with machining conditions and operating time. Simultaneously, the varying material thermal properties, structural shapes, and constraint states of CNC machine tool components complicate the heat transfer process within these components. Under the combined influence of these multiple heat sources, CNC machine tool components are prone to developing spatially uneven and time-varying temperature fields, further leading to thermally induced deformation and affecting the machining accuracy of the CNC machine tool.

[0003] To address the thermal deformation problem of CNC machine tools, existing technologies typically address it through structural thermal design, thermal error compensation, or active cooling. For example, the types of thermal deformation that are prone to occur can be constrained during the machine tool design phase, and error compensation methods can be used during subsequent operation to reduce the impact of thermal deformation on machining accuracy. However, such methods usually require corresponding configurations during the machine tool structural design phase, which limits subsequent adaptation and modification for CNC machine tools whose structures have already been finalized.

[0004] Another approach involves setting up cooling circuits in different parts of the CNC machine tool and actively controlling the temperature based on the machine tool's thermal state. In existing active cooling methods, liquid cooling requires the installation of cooling pipes and the transport of cooling media between different cooling locations. When the locations to be controlled are relatively dispersed, the arrangement of the cooling pipes becomes complex and is easily limited by the internal installation space and structural position of the CNC machine tool, making it difficult to flexibly set cooling locations according to different heat source locations.

[0005] Furthermore, due to the spatial dispersion and time-varying characteristics of multiple heat sources in CNC machine tools, the temperature rise and impact on thermal deformation vary across different structural parts. If cooling adjustments are implemented uniformly or passively based solely on current temperature changes, it is difficult to rationally allocate cooling capacity according to the actual thermal state of different temperature-controlled components. Simultaneously, the structural components of CNC machine tools exhibit a certain time response process from changes in heat source state and heat dissipation state to changes in temperature field and thermal deformation. Controlling solely based on the current temperature often results in adjustments being made only after significant changes in the temperature field have occurred, making it difficult to proactively adjust the heat dissipation state of different locations based on the subsequent development trend of thermal deformation.

[0006] Therefore, how to achieve distributed heat dissipation for different temperature-controlled parts of a CNC machine tool while avoiding the limitations of complex centralized cooling pipelines, and how to determine the subsequent thermal deformation state by combining the current temperature state, heat input state, and heat dissipation state, and then allocate cooling capacity to different temperature-controlled parts accordingly, so as to improve the targeting of temperature field control of CNC machine tools and suppress thermal deformation of structural components, is a technical problem that needs to be solved. Summary of the Invention

[0007] The present invention aims to solve the problems that existing CNC machine tools face multiple spatially dispersed and time-varying heat sources, making it difficult to adjust the heat dissipation status of different structural parts, and that temperature control based solely on the current temperature cannot take into account the temperature response lag and subsequent thermal deformation trends. The present invention provides a distributed air-cooled heat spreader CNC machine tool temperature control system and method.

[0008] To achieve the above objectives, the present invention adopts the following technical solution.

[0009] A distributed air-cooled heat exchange plate CNC machine tool temperature control system includes multiple air-cooled heat exchange plate heat dissipation units, a temperature monitoring unit, and a control unit; Multiple air-cooled heat dissipation units are respectively set in different temperature-controlled parts of the CNC machine tool. Each air-cooled heat dissipation unit includes a heat exchange plate and an air-cooled heat exchange component connected to the heat exchange plate. The temperature monitoring unit is connected to the control unit to acquire temperature data at different locations on the CNC machine tool; The control unit is connected to multiple air-cooled vapor chamber heat dissipation units. It is used to determine the thermal deformation state of the CNC machine tool in a subsequent time period based on temperature data, heat source power data, cold source power data and deformation calculation model. Based on the thermal deformation state, it determines the cooling capacity distribution results corresponding to the multiple air-cooled vapor chamber heat dissipation units, and adjusts the operating state of the corresponding air-cooled vapor chamber heat dissipation units according to the cooling capacity distribution results.

[0010] Furthermore, the air-cooled heat exchange component includes fins and a fan. The fins are connected to a heat spreader plate, and the fan is located on one side of the fins to drive airflow through the fins.

[0011] Furthermore, the temperature distribution plate includes a support column, a working fluid, a first liquid-absorbing core, and a second liquid-absorbing core. The first liquid-absorbing core is disposed on the evaporation surface of the temperature distribution plate, and the second liquid-absorbing core is disposed on the condensation surface of the temperature distribution plate. The capillary driving force of the first liquid-absorbing core is greater than that of the second liquid-absorbing core, and the flow resistance of the second liquid-absorbing core is less than that of the first liquid-absorbing core.

[0012] Furthermore, the first liquid-absorbing core is a sintered liquid-absorbing core, and the second liquid-absorbing core is a grooved liquid-absorbing core.

[0013] Furthermore, multiple air-cooled heat dissipation units are respectively set at different temperature control locations determined based on the spatial distribution characteristics of the heat source and the temperature change characteristics of the CNC machine tool.

[0014] Furthermore, the temperature monitoring unit includes a sensor driver board, which is connected to the control unit. The temperature data collected by the temperature monitoring unit is transmitted to the control unit via the sensor driver board.

[0015] Furthermore, the distributed air-cooled vapor chamber CNC machine tool temperature control system also includes a fan drive board, which is connected to the control unit and the fans of multiple air-cooled vapor chamber heat dissipation units. The control unit is used to determine the amount and rate of thermal deformation in subsequent time steps based on temperature data, heat source power data, cold source power data and deformation calculation model. When the amount and rate of thermal deformation exceed the corresponding allowable range, the control unit determines the target cold source power corresponding to each of the multiple air-cooled heat dissipation units and adjusts the speed of the corresponding fan according to the target cold source power through the fan drive board.

[0016] This invention also provides a temperature control method for CNC machine tools with distributed air-cooled heat exchange plates, comprising: Acquire temperature data, heat source power data, and cold source power data at different locations of structural components in a CNC machine tool; Based on temperature data, heat source power data, cold source power data, and deformation calculation model, the thermal deformation state of CNC machine tool structural components in subsequent time periods is determined. Based on the thermal deformation state, determine the cold energy distribution results corresponding to different temperature control parts; Based on the distribution of cooling capacity to different parts of the body under temperature control, the heat dissipation status of the corresponding parts under temperature control is adjusted.

[0017] Furthermore, the thermal deformation state of the CNC machine tool structural components in subsequent time periods is determined, including: Based on temperature data, heat source power data, cold source power data, and deformation calculation model, the amount and rate of thermal deformation in subsequent time steps are determined. Determine whether the amount and rate of thermal deformation exceed the corresponding allowable range; When the amount of thermal deformation and the rate of thermal deformation exceed the corresponding allowable range, the target cold source power that keeps the amount of thermal deformation in subsequent time steps within the corresponding allowable range is determined, and the cold energy distribution result is formed according to the target cold source power corresponding to different parts to be controlled.

[0018] Furthermore, the deformation calculation model is established based on the theory of thermoelasticity. The temperature field distribution of the CNC machine tool structural component is determined according to the temperature data, and the thermal deformation of the CNC machine tool structural component is determined according to the temperature field distribution. Adjust the heat dissipation status of the corresponding temperature-controlled parts according to the target cold source power of the different parts to be controlled.

[0019] The beneficial effects of this invention are: This invention sets up air-cooled heat dissipation units on different parts of a CNC machine tool to be controlled, so that different locations form corresponding distributed heat dissipation areas. It does not rely on complex cooling water circuits that run through multiple parts to be controlled, and can flexibly set the heat dissipation positions according to the spatial distribution of heat sources of the CNC machine tool, thereby improving the adaptability of the temperature control system to spatially dispersed heat sources.

[0020] This invention employs a heat dissipation structure combining a heat exchanger plate and an air-cooled heat exchange component. The heat is transferred to the temperature-controlled area through the phase change process of the working fluid within the heat exchanger plate, and the heat is released to the outside air using the air-cooled heat exchange component. Increasing the heat exchange area with fins and enhancing airflow with a fan improves the air-cooled heat exchange capacity, thereby increasing the heat extraction and dissipation efficiency of the temperature-controlled area.

[0021] This invention determines different temperature-controlled parts based on the spatial distribution characteristics of heat sources and temperature change characteristics of CNC machine tools, and sets multiple air-cooled heat dissipation units to correspond to different temperature-controlled parts, so that the heat dissipation positions match the actual heat source distribution and temperature change of CNC machine tools, thereby improving the targeted nature of distributed heat dissipation.

[0022] This invention determines the thermal deformation state of a CNC machine tool in subsequent time periods based on temperature data, heat source power data, cold source power data, and a deformation calculation model. It also determines the cooling capacity distribution results corresponding to multiple air-cooled heat dissipation units based on the predicted thermal deformation state. This allows the heat dissipation state of different temperature-controlled parts to be adjusted according to the subsequent thermal deformation trend, thereby incorporating the time lag of temperature response into the temperature control process, reducing the control lag caused by passive adjustment based solely on the current temperature, and suppressing thermally induced deformation of CNC machine tool structural components. Attached Figure Description

[0023] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the overall structure of the distributed air-cooled heat spreader CNC machine tool temperature control system of the present invention; Figure 2 This is a schematic diagram of the structure of the air-cooled heat dissipation unit of the present invention; Figure 3 This is a flowchart illustrating the temperature control method for CNC machine tools using a distributed air-cooled heat exchanger plate according to the present invention. Detailed Implementation

[0024] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] See Figure 1 The first embodiment of the present invention proposes a distributed air-cooled heat exchange plate CNC machine tool temperature control system, including multiple air-cooled heat exchange plate heat dissipation units 10, temperature monitoring units 20 and control units 30; Multiple air-cooled heat dissipation units 10 are respectively disposed in different temperature-controlled parts of the CNC machine tool 1. Each air-cooled heat dissipation unit 10 includes a heat exchange plate 11 and an air-cooled heat exchange component 14 connected to the heat exchange plate 11 for heat exchange. The temperature monitoring unit 20 is connected to the control unit 30 and is used to acquire temperature data at different locations of the CNC machine tool 1. The control unit 30 is connected to multiple air-cooled heat dissipation units 10, and is used to determine the thermal deformation state of the CNC machine tool 1 in a subsequent time period based on the temperature data, heat source power data, cold source power data and deformation calculation model, determine the cooling capacity distribution result corresponding to each of the multiple air-cooled heat dissipation units 10 according to the thermal deformation state, and adjust the operating state of the corresponding air-cooled heat dissipation units 10 according to the cooling capacity distribution result.

[0027] In practice, the CNC machine tool 1 is subjected to multiple heat sources during operation, including spindle heating, motor heating, frictional heating of moving parts, and ambient heat sources. These heat sources are located at different positions on the CNC machine tool 1 and change with the machining conditions and operating status of the machine tool 1, resulting in a spatially uneven and time-varying temperature field on the structural components of the CNC machine tool 1. Under the influence of this temperature field, the structural components undergo thermal deformation, thereby affecting the machining accuracy of the CNC machine tool 1.

[0028] To address the spatial dispersion characteristics of different heat sources, air-cooled heat dissipation units 10 are arranged at different temperature-controlled locations on the CNC machine tool 1, so that each air-cooled heat dissipation unit 10 corresponds to a different local heat-affected area. The multiple air-cooled heat dissipation units 10 are dispersed among themselves, not relying on a centralized cooling water circuit running through different locations on the CNC machine tool 1. Therefore, the installation positions can be flexibly determined according to the specific structure of the CNC machine tool 1 and the distribution of heat sources.

[0029] Each air-cooled vapor chamber heat dissipation unit 10 uses a vapor chamber 11 to obtain heat from the corresponding temperature-controlled part and releases the heat to the outside air through the air-cooled heat exchange component 14. The vapor chamber 11 achieves heat transfer through the phase change of the internal working fluid. After the heat generated by the structural components of the CNC machine tool 1 enters the vapor chamber 11, the working fluid in the corresponding heat-collecting area absorbs heat and undergoes a phase change. The heat migrates with the working fluid to the lower temperature area and is released in the corresponding area. Then, it exchanges heat with the outside air through the air-cooled heat exchange component 14, thus forming a heat transfer path from the structural components of the CNC machine tool 1 to the vapor chamber 11 and then from the vapor chamber 11 to the outside air.

[0030] Temperature monitoring unit 20 acquires temperature data at multiple locations on CNC machine tool 1. Temperature data from different locations retains their corresponding spatial location information to characterize the spatial distribution of the current temperature field on CNC machine tool 1. The temperature monitoring locations can be determined based on the main heat-generating areas, areas with significant temperature changes, and structural areas where thermal deformation needs to be controlled on CNC machine tool 1.

[0031] Heat source power data is used to characterize the heat input of the CNC machine tool 1 in its current operating state, while cold source power data is used to characterize the heat dissipation state applied to each temperature-controlled component. In the illustrated embodiment, the CNC system 40 is correspondingly configured with the CNC machine tool 1. The control unit 30 can acquire operating information related to the current working condition and heat source state during the operation of the CNC machine tool 1, and combine the operating information to obtain or form heat source power data. For cases where the heat source operating power can be directly obtained, the corresponding power information can be used as heat source power data. For cases where the heat input is characterized based on the operating state, the corresponding heat source power data can also be obtained based on the current operating state of the CNC machine tool 1.

[0032] The control unit 30 can also interact with the host computer 50. The host computer 50 can be used to display or manage temperature data, heat source power data, cold source power data, thermal deformation status, and cooling capacity distribution results, and can be used to input or save relevant control conditions used in the temperature control process. The numerical control system 40 and the host computer 50 work together to complete the acquisition of operating information, data interaction, and status display in the temperature control process. Their settings do not change the control relationship of the multiple air-cooled heat dissipation units 10 for different parts to be controlled by heat dissipation.

[0033] After obtaining temperature data, heat source power data, and cold source power data, the control unit 30 combines the above data with the deformation calculation model to determine the thermal deformation state of the CNC machine tool 1 within the subsequent time period starting from the current control moment. The subsequent time period is the time range used to predict the development of the thermal state after the current control moment, and can be further divided into multiple consecutive time steps to obtain the changes in thermal deformation as the prediction time develops.

[0034] The deformation calculation model is used to establish the correspondence between the temperature state of the CNC machine tool 1 and the structural thermal deformation. The control unit 30 calculates the possible thermal deformation state of the CNC machine tool 1 in subsequent time periods based on the temperature field state represented by the current temperature data, the heat input state represented by the heat source power data, and the heat dissipation state represented by the cold source power data. After each temperature acquisition and cooling adjustment, the new thermal deformation state for subsequent time periods is redefined based on the updated temperature data, heat source power data, and cold source power data, thus forming a prediction process that is continuously updated according to the operating state of the CNC machine tool 1.

[0035] After obtaining the thermal deformation state over subsequent time periods, based on the influence of different temperature-controlled parts on the subsequent thermal deformation state and the correspondence between each temperature-controlled part and the air-cooled vapor chamber heat dissipation unit 10, the cooling capacity distribution results corresponding to multiple air-cooled vapor chamber heat dissipation units 10 are determined. The cooling capacity distribution results are used to characterize the heat dissipation state that the corresponding air-cooled vapor chamber heat dissipation unit 10 needs to maintain, increase, or decrease.

[0036] Multiple air-cooled heat dissipation units 10 are adjusted according to their respective cooling capacity distribution results to match the actual heat dissipation capacity of different temperature-controlled parts with their corresponding thermal states. After the previous control process changes the heat dissipation state of different temperature-controlled parts, the temperature field of the CNC machine tool 1 changes accordingly. The temperature monitoring unit 20 continues to acquire new temperature data and uses the new data to determine the subsequent thermal deformation state and cooling capacity distribution results, thereby forming a continuous closed-loop temperature control process.

[0037] With the above setup, multiple air-cooled heat dissipation units 10 are distributed in different temperature-controlled parts of the CNC machine tool 1. By combining multi-position temperature monitoring, subsequent thermal deformation prediction, and cooling distribution at different positions, the heat dissipation state at different positions can be adjusted according to the uneven distribution of heat sources in time and space. This reduces local heat accumulation and irregular thermal deformation caused by non-uniform temperature fields, while avoiding the problems of complex cooling water circuits and low layout flexibility in traditional centralized liquid cooling structures.

[0038] To further explain the present invention, the air-cooled heat exchange component 14 includes fins 12 and a fan 13. The fins 12 are connected to the heat spreader 11, and the fan 13 is disposed on one side of the fins 12 to drive airflow through the fins 12.

[0039] See Figure 2In specific implementation, the fins 12 form a heat transfer connection with the heat dissipation area of ​​the heat exchange plate 11, so that the heat transferred to the heat dissipation area through the phase change process inside the heat exchange plate 11 is further transferred to the fins 12. The fins 12 increase the effective area for heat exchange between the heat exchange plate 11 and the outside air, so that the heat transferred from the heat exchange plate 11 can be released to the surrounding air through a larger heat exchange surface.

[0040] Fan 13 is located on the side corresponding to fin 12. When fan 13 is running, it creates a forced airflow across the surface of fin 12, which allows the air that has increased in temperature after heat exchange with fin 12 to leave the vicinity of fin 12 in a timely manner, and allows fresh air to continuously flow through fin 12, thereby improving the convective heat transfer capacity between fin 12 and the outside air.

[0041] The changing operating state of fan 13 can alter the airflow through fins 12, thus further changing the heat dissipation capacity of the air-cooled vapor chamber heat dissipation unit 10. When the corresponding temperature-controlled part requires increased cooling capacity, the operating state of the corresponding fan 13 can be increased, thereby increasing the airflow and air velocity through fins 12. When the corresponding temperature-controlled part requires reduced cooling capacity, the operating state of fan 13 can be decreased accordingly.

[0042] The vapor chamber 11, fins 12 and fan 13 form a continuous heat extraction, heat transfer and heat dissipation path, enabling the vapor chamber 11 to conduct local heat through phase change heat transfer, and the heat exchange area to be expanded through the fins 12. The fan 13 is then used to enhance air convection heat transfer, thereby improving the heat extraction efficiency and heat dissipation capacity under air-cooled conditions and improving the problem of low heat transfer coefficient when only natural convection is used.

[0043] To further explain the present invention, the temperature distribution plate 11 includes a support column 111, a working fluid 112, a first liquid-absorbing core 113 and a second liquid-absorbing core 114. The first liquid-absorbing core 113 is disposed on the evaporation surface of the temperature distribution plate 11, and the second liquid-absorbing core 114 is disposed on the condensation surface of the temperature distribution plate 11. The capillary driving force of the first liquid-absorbing core 113 is greater than the capillary driving force of the second liquid-absorbing core 114, and the flow resistance of the second liquid-absorbing core 114 is less than the flow resistance of the first liquid-absorbing core 113.

[0044] In practice, the temperature plate 11 forms a working space inside for the working medium 112 to undergo phase change and migration. The support column 111 is set inside the temperature plate 11 to support the plate body of the temperature plate 11, so that the temperature plate 11 maintains the working space required for the movement and phase change of the working medium 112.

[0045] The working fluid 112 is disposed inside the heat exchange plate 11. The evaporation surface of the heat exchange plate 11 corresponds to the heat extraction area of ​​the CNC machine tool 1. The heat generated by the structural components of the CNC machine tool 1 is transferred to the evaporation surface, causing the liquid working fluid 112 located near the evaporation surface to absorb heat and vaporize. The vaporized working fluid 112 migrates to the relatively cooler condensation surface and, after releasing heat at the condensation surface, transforms back into a liquid phase.

[0046] The first liquid-absorbing core 113 is disposed on the evaporation surface and has a relatively high capillary driving force. When the condensed liquid working medium 112 flows back to the evaporation area, the first liquid-absorbing core 113 uses capillary action to transport the liquid working medium 112 to the evaporation surface to replenish the liquid working medium consumed during the evaporation process.

[0047] The second wicking core 114 is disposed on the condensation surface and has relatively low flow resistance, allowing the liquid working medium 112 formed on the condensation surface to leave the condensation region smoothly and flow back to the evaporation region. Thus, the first wicking core 113 mainly meets the requirement of the evaporation region for replenishing the liquid working medium, while the second wicking core 114 mainly meets the requirement of the condensation region for reducing the resistance to the return flow of the liquid working medium.

[0048] After the working fluid 112 absorbs heat and undergoes a phase change on the evaporation surface, it transfers the heat to the condensation surface. After releasing heat on the condensation surface, it reforms into a liquid phase and flows back to the evaporation surface through the corresponding liquid absorption structure. This process of evaporation, migration, condensation and reflux is repeated continuously, so that the temperature distribution plate 11 can continuously obtain heat from the temperature-controlled part of the CNC machine tool 1.

[0049] By employing a first liquid-absorbing core 113 and a second liquid-absorbing core 114 with different mass transfer characteristics on the evaporation surface and the condensation surface respectively, the capillary liquid replenishment capacity required in the evaporation zone and the low-resistance reflux capacity required in the condensation zone can be taken into account. This reduces the insufficient liquid supply in the evaporation zone caused by insufficient reflux of the working fluid 112, and enables the temperature equalization plate 11 to maintain a stable and continuous phase change heat transfer process.

[0050] To further explain the present invention, the first liquid-absorbing core 113 is a sintered liquid-absorbing core, and the second liquid-absorbing core 114 is a grooved liquid-absorbing core.

[0051] In specific implementation, the first liquid suction core 113 is a sintered liquid suction core. The sintered liquid suction core has a porous structure inside that generates capillary action, so that the liquid working fluid 112 can be transported to the evaporation surface under capillary action, thereby continuously replenishing the liquid to the area where the working fluid 112 evaporates.

[0052] The second suction core 114 is a grooved suction core. The grooved suction core forms a grooved path for the liquid working medium 112 to flow, so that the working medium 112 can flow along the groove in the reflux direction after changing from gas phase to liquid phase on the condensation surface, and reduces the flow resistance encountered by the condensate during the reflux process.

[0053] When the evaporation surface continuously receives heat from the CNC machine tool 1 structural component, the sintered wicking core continuously replenishes the liquid working fluid 112 through its capillary action. After the working fluid 112 condenses on the condensation surface, it returns to the evaporation surface through the reflux path formed by the grooved wicking core. The two types of wicking cores are configured to meet the different mass transfer requirements of the evaporation and condensation sides, respectively, and together maintain the circulation of the working fluid 112 inside the heat spreader 11.

[0054] By employing a combination of sintered wicking cores and grooved wicking cores, the higher capillary driving force required on the evaporation side can be combined with the lower reflux resistance required on the condensation side, thereby improving the stability of the working fluid 112 circulation and enabling the heat spreader 11 to maintain a relatively stable phase change heat transfer capability under continuous heat input.

[0055] To further explain the present invention, the plurality of air-cooled heat dissipation units 10 are respectively disposed at different temperature control locations determined according to the heat source spatial distribution characteristics and temperature change characteristics of the CNC machine tool 1.

[0056] In specific implementation, before arranging the air-cooled heat dissipation unit 10, the spatial location of different heat sources and the temperature changes at different locations over time are first analyzed during the operation of the CNC machine tool 1. The spatial distribution characteristics of heat sources are used to reflect the positional distribution of the spindle, motor, friction points of moving pairs, and other heat-generating areas in the structure of the CNC machine tool 1, and the temperature change characteristics are used to reflect the temperature rise and temperature changes that occur at the above-mentioned locations and their surrounding structures during the operation of the CNC machine tool 1.

[0057] Based on the spatial distribution characteristics of the heat source, the structural region where the main heat input is located is determined. Then, combined with the temperature change characteristics of different locations, the locations that are prone to significant temperature changes and affect the thermal deformation of the structure are identified, thereby determining the different temperature control points.

[0058] After determining the areas to be temperature-controlled, multiple air-cooled vapor chamber heat dissipation units 10 are installed corresponding to different areas. Each air-cooled vapor chamber heat dissipation unit 10 establishes a heat transfer relationship with the corresponding area through the vapor chamber 11, thereby directly obtaining heat from the corresponding location. The multiple air-cooled vapor chamber heat dissipation units 10 are not required to be arranged at equal intervals; instead, their specific locations are determined based on the actual spatial distribution of heat sources and temperature changes in the CNC machine tool 1.

[0059] During the operation of the CNC machine tool 1, the arrangement of the air-cooled heat dissipation unit 10 and the result of the cooling capacity distribution jointly determine the actual temperature control state at different locations. The spatial position of the air-cooled heat dissipation unit 10 determines the part to be controlled that it directly affects, while the result of the cooling capacity distribution determines the heat dissipation state of the air-cooled heat dissipation unit 10 in the current control process, so that the spatial layout of the heat dissipation device and the dynamic cooling capacity adjustment work together.

[0060] By determining the temperature control location based on the spatial distribution characteristics of the heat source and the temperature change characteristics, multiple air-cooled heat dissipation units 10 can be centrally located at the actual location with temperature control requirements. This improves the matching degree between the layout of distributed heat dissipation devices and the actual heat source distribution of the CNC machine tool 1, and reduces the waste of cooling energy caused by non-targeted heat dissipation of low heat-affected areas.

[0061] To further explain the present invention, the temperature monitoring unit 20 includes a sensor driver board 21, which is connected to the control unit 30. The temperature data collected by the temperature monitoring unit 20 is transmitted to the control unit 30 via the sensor driver board 21.

[0062] In practice, the temperature monitoring unit 20 collects temperature data at multiple temperature monitoring locations corresponding to the CNC machine tool 1. These multiple temperature monitoring locations can be distributed in the main heat-generating areas, areas with significant temperature changes, and areas that affect the thermal deformation of the structure, so that the temperature data obtained from multiple locations can collectively reflect the temperature field changes of the CNC machine tool 1.

[0063] After the temperature monitoring unit 20 collects temperature signals corresponding to different locations, it connects and transmits the signals to each temperature acquisition channel via the sensor driver board 21, and then transmits the resulting temperature data to the control unit 30. Each temperature data retains the corresponding acquisition location information, enabling the control unit 30 to establish a correspondence between the temperature data from different locations and the corresponding structural areas of the CNC machine tool 1.

[0064] After receiving the temperature data, the control unit 30 uses the current temperature data, along with the current heat source power data and cold source power data, to calculate the subsequent thermal deformation state. After the cooling capacity adjustment is completed in the current control cycle, the temperature monitoring unit 20 continues to obtain the adjusted new temperature data and transmits the new temperature data to the control unit 30 via the sensor driver board 21. The new temperature state is then used to perform thermal deformation prediction and cooling capacity allocation for the next control cycle.

[0065] By continuously acquiring and transmitting temperature data at different locations of the CNC machine tool 1 through the temperature monitoring unit 20 and the sensor drive board 21, the deformation calculation model can continuously provide data reflecting the actual temperature field changes, so that the subsequent thermal deformation prediction results and cold energy distribution results are updated according to the actual operating state of the CNC machine tool 1, thereby forming a continuous closed-loop adjustment process.

[0066] To further explain the present invention, it also includes a fan drive board 31, which is connected to the control unit 30 and the fans 13 of the plurality of air-cooled heat dissipation units 10 respectively. The control unit 30 is used to determine the amount and rate of thermal deformation in subsequent time steps based on the temperature data, the heat source power data, the cold source power data and the deformation calculation model, and when the amount and rate of thermal deformation exceed the corresponding allowable range, determine the target cold source power corresponding to the multiple air-cooled heat dissipation units 10, and adjust the speed of the corresponding fan 13 according to the target cold source power through the fan drive board 31.

[0067] In practice, the current control time is used as the prediction starting point, and the subsequent time period is divided into multiple consecutive time steps. The control unit 30 determines the thermal deformation amount of each subsequent time step based on the current temperature data, heat source power data, cold source power data, and deformation calculation model, and determines the corresponding thermal deformation rate based on the change of thermal deformation amount with the prediction time.

[0068] The thermal deformation amount is used to characterize the thermally induced deformation state of the structural components of the CNC machine tool 1 at the predicted time, while the thermal deformation rate is used to characterize how quickly the thermal deformation changes over time. By simultaneously obtaining the thermal deformation amount and the thermal deformation rate, it can be determined whether the CNC machine tool 1 is likely to experience structural thermal deformation exceeding the allowable state as the current thermal state continues to develop.

[0069] For each thermal deformation amount and thermal deformation rate, corresponding allowable ranges are set, and the thermal deformation amount and thermal deformation rate for subsequent time steps are compared with the corresponding allowable ranges. When the prediction result reaches the excess condition set in this embodiment, it is determined that continuing to operate according to the current heat dissipation state may cause subsequent thermal deformation to fail to remain in the allowable state. At this time, the target cold source power required by different air-cooled heat dissipation units 10 is further determined.

[0070] In one possible implementation, when determining the target cold source power, the cold source power corresponding to multiple temperature-controlled parts is used as the adjustment quantity. A response relationship between different cold source powers and the thermal state of the CNC machine tool structure is established. While keeping the power of the remaining cold sources in their current state, the cold source power of each cold source is changed separately. The degree of influence of different cold sources on the corresponding temperature-controlled parts is determined based on the predicted thermal deformation state before and after the corresponding cold source power change.

[0071] For any part to be temperature controlled, the cold source with the greatest impact on the predicted thermal deformation state of the part to be temperature controlled is determined as the main control cold source. The cold sources with less impact maintain their original cold source power in the current control cycle, and their impact on the thermal state of the structure is used as a superposition effect to participate in the determination of the subsequent thermal deformation state.

[0072] Using the current cold source power of the main cold source as the initial value of the candidate cold source power, the candidate cold source power, along with the current temperature data and heat source power data, is substituted into the deformation calculation model to obtain the thermal deformation state corresponding to multiple subsequent time steps under the action of the candidate cold source power. When the predicted thermal deformation exceeds the corresponding allowable range, the candidate cold source power of the main cold source is increased by a preset minimum power adjustment step size, and the updated candidate cold source power is re-substituted into the deformation calculation model to determine the thermal deformation state corresponding to multiple subsequent time steps.

[0073] The update and thermal deformation prediction of the candidate cold source power are repeated until a candidate cold source power is obtained that keeps the thermal deformation within the corresponding allowable range for multiple subsequent time steps. If the predicted thermal deformation still exceeds the corresponding allowable range when the candidate cold source power reaches the maximum allowable power of the corresponding cold source, an alarm message is output to prompt the CNC machine tool to reduce its operating load or stop operation.

[0074] The candidate cold source power that meets the allowable range of thermal deformation is determined as the target cold source power of the corresponding air-cooled vapor chamber heat dissipation unit 10. The multiple target cold source powers corresponding to different temperature-controlled parts together constitute the cooling capacity allocation result of the current control cycle.

[0075] The above method for determining the target cold source power is used to illustrate an implementable process for intelligent cold capacity allocation. When the required cold source power can be directly determined based on the deformation calculation model and corresponding constraint relationships, the target cold source power corresponding to different temperature-controlled parts can also be obtained by using appropriate solution methods, as long as the obtained target cold source power can be used to keep the thermal deformation in subsequent time steps within the corresponding allowable range.

[0076] The fan drive board 31 is connected to the control unit 30 and multiple fans 13. After obtaining the target cold source power of the heat dissipation unit 10 of different air-cooled heat dissipation plates, the control unit 30 determines the operating state that the corresponding fan 13 needs to achieve according to the target cold source power, and adjusts the speed of the corresponding fan 13 through the fan drive board 31.

[0077] The change in the fan speed 13 alters the airflow and velocity through the corresponding fins 12, thereby changing the convective heat transfer state between the fins 12 and the outside air, and consequently changing the actual heat dissipation capacity of the corresponding air-cooled vapor chamber heat dissipation unit 10. Thus, different temperature-controlled components can have their heat dissipation adjusted according to their respective target cold source power.

[0078] The structural components of the CNC machine tool 1 possess a certain degree of thermal inertia. When the rotational speed of the fan 13 changes, the heat exchange capacity of the air-cooled heat exchange component 14, the temperature of the heat spreader 11, and the temperature field of the CNC machine tool 1 structural components gradually change according to the heat transfer process. Therefore, the time lag of the temperature response must be considered during control. By predicting the thermal deformation state at multiple subsequent time steps, the target cooling source power can be determined in advance based on the future thermal deformation trend at the current moment. This allows for cooling capacity adjustment to begin before a significant change in the actual temperature field occurs, thereby reducing control lag caused by the temperature response lag.

[0079] In another optional embodiment, when the vapor chamber 11 has an adjustable structure capable of changing the internal working fluid circulation state, the circulation rate of the working fluid 112 within the vapor chamber 11 can be adjusted according to the cooling capacity distribution results corresponding to different temperature-controlled parts, thereby changing the vapor chamber 11's ability to transfer heat from the evaporation region to the condensation region. Alternatively, the fan speed 13 and the working fluid 112 circulation rate can be adjusted simultaneously according to the cooling capacity distribution results, with both adjustment methods jointly changing the heat dissipation state of the corresponding air-cooled vapor chamber heat dissipation unit 10. In this embodiment, adjusting the fan speed 13 is preferred to achieve cooling capacity regulation.

[0080] With the above settings, the potential thermal deformation can be identified in advance based on the amount and rate of thermal deformation at multiple future time steps. The cooling capacity required to meet the thermal deformation constraints is then distributed to different air-cooled heat dissipation units 10. The cooling capacity distribution results are then implemented in the actual heat dissipation process through adjustable operating states such as the fan 13. This reduces the time lag caused by passive adjustment based solely on the current temperature and improves the targeting of cooling capacity distribution to different temperature-controlled parts.

[0081] See Figure 3 The second embodiment of the present invention proposes a temperature control method for CNC machine tools with distributed air-cooled heat spreaders, comprising: Acquire temperature data, heat source power data, and cold source power data at different locations of structural components in a CNC machine tool; Based on the temperature data, the heat source power data, the cold source power data, and the deformation calculation model, the thermal deformation state of the CNC machine tool structural component in the subsequent time period is determined; Based on the thermal deformation state, determine the cold energy distribution results corresponding to different temperature-controlled parts; Based on the cooling distribution results corresponding to different temperature-controlled parts, the heat dissipation state of the corresponding temperature-controlled parts is adjusted respectively.

[0082] In practice, the temperature data at different locations on the CNC machine tool's structural components is first obtained, and the correspondence between different temperature data and their corresponding spatial locations is retained. The temperature data from multiple locations are used to collectively characterize the current temperature field state. Simultaneously, the heat source power data corresponding to the current operating state of the CNC machine tool and the currently applied cold source power data are obtained to collectively characterize the current heat input and cold output state.

[0083] Input the current temperature data, heat source power data, and cold source power data into the deformation calculation model, establish the subsequent prediction time range starting from the current control time, and determine the thermal deformation state of the CNC machine tool structural component in the subsequent time period based on the change of the temperature field as the current thermal state continues to develop.

[0084] After obtaining the thermal deformation state over subsequent time periods, the corresponding cooling capacity adjustment requirements for each temperature-controlled part are determined based on the correlation between the predicted thermal deformation state and the different temperature-controlled parts. This results in a cooling capacity allocation for each temperature-controlled part. The cooling capacity is not applied uniformly to all locations, but is determined separately for each temperature-controlled part.

[0085] Based on the cooling capacity distribution results for each temperature-controlled component, the heat dissipation status at the corresponding location is adjusted. Changes in the heat dissipation status of different temperature-controlled components further alter the temperature field development process of the CNC machine tool's structural parts. In the next control cycle, temperature data, heat source power data, and cold source power data for different locations are re-acquired, and the updated data is used to re-predict the thermal deformation status for subsequent time periods and determine new cooling capacity distribution results.

[0086] Through the above process, a closed-loop process is formed, which includes current thermal state acquisition, subsequent thermal deformation prediction, cold energy distribution to different parts to be controlled, heat dissipation state adjustment, and new thermal state acquisition. This enables the temperature control process to adjust the heat dissipation capacity of different locations in advance according to the subsequent thermal deformation trend, thereby adapting to the dynamic changes of the CNC machine tool's heat source in time and space.

[0087] The second embodiment of the present invention is further explained by determining the amount and rate of thermal deformation in subsequent time steps based on the temperature data, the heat source power data, the cold source power data and the deformation calculation model. Determine whether the amount of thermal deformation and the rate of thermal deformation exceed the corresponding allowable range; When the thermal deformation amount and the thermal deformation rate exceed the corresponding allowable range, a target cold source power is determined to keep the thermal deformation amount within the corresponding allowable range for subsequent multiple time steps, and the cold energy distribution result is formed according to the target cold source power corresponding to different temperature control parts.

[0088] In practice, the time period following the current control moment is divided into multiple consecutive time steps, and the corresponding thermal deformation amount is determined for each time step. The corresponding thermal deformation rate is determined based on the change in thermal deformation amount over the prediction time, thereby obtaining the state of change of thermal deformation amount over the prediction time and the rate of change of thermal deformation.

[0089] The predicted thermal deformation amount is compared with the corresponding allowable range, and the thermal deformation rate is also compared with the corresponding allowable range. By comparing multiple subsequent time steps, it is possible to determine whether the actual structural component will continue to develop beyond the allowable range before it has already experienced the corresponding degree of thermal deformation.

[0090] When the thermal deformation amount and thermal deformation rate reach the corresponding excess conditions, the cold source power corresponding to different temperature-controlled parts is used as the control quantity that needs to be adjusted. Specifically, in order to characterize the correspondence between each temperature-controlled part and the structural thermal state, a state-space response relationship is established between the cold source power, the structural thermal state, and the CNC machine tool load information. The structural thermal state includes the temperature state and thermal deformation state at different locations, and the load information includes the feed state and speed state of the CNC machine tool. The state-space response relationship is used to characterize the dynamic influence of different cold source power changes and load changes on the corresponding structural thermal state.

[0091] For any temperature-controlled part, while maintaining the current power of the other cold sources, the power of each cold source is changed, and the influence of each cold source on the temperature-controlled part is determined based on the predicted thermal deformation state before and after the power change. Under linear coupling conditions, cold sources with less influence are not considered as the primary adjustment targets for the current temperature-controlled part, and their original power is maintained in the current control cycle. Among the remaining cold sources, the one with the greatest influence on the temperature-controlled part is determined as the primary control cold source, and the thermal state influence of the other cold sources on the temperature-controlled part is considered as a superposition effect in the state-space response relationship and participates in the determination of the subsequent thermal deformation state.

[0092] In one specific implementation, the cold source power corresponding to the current control cycle is used as the initial value of the candidate cold source power. When the predicted thermal deformation still exceeds the corresponding allowable range, for the main control cold source determined for the corresponding temperature-controlled part, the candidate cold source power of the main control cold source is increased by a preset minimum power adjustment step size, and the updated candidate cold source power, together with the current temperature data and heat source power data, is used for thermal deformation calculation in subsequent time steps.

[0093] If the thermal deformation amount obtained from the updated candidate cold source power in subsequent time steps remains within the corresponding allowable range, then the increase of the candidate cold source power of the main control cold source is stopped, and the candidate cold source power that first makes the thermal deformation amount meet the corresponding allowable range is determined as the target cold source power for the next control cycle; if there is still a situation where the thermal deformation amount exceeds the corresponding allowable range, then the candidate cold source power continues to be increased according to the preset minimum power adjustment step size, and subsequent thermal deformation calculations are performed again until the thermal deformation amount meets the corresponding allowable range or the candidate cold source power reaches the maximum allowable power of the corresponding cold source.

[0094] When the power of the candidate cold source reaches the maximum allowable power of the corresponding cold source, and the predicted thermal deformation still cannot be kept within the corresponding allowable range, an alarm message is output to prompt the reduction of the operating load of the CNC machine tool or appropriate shutdown.

[0095] By continuously adjusting the cooling source power and comparing prediction results, a set of cooling source powers is obtained that can keep the thermal deformation within the corresponding allowable range for multiple subsequent time steps. The cooling source power corresponding to different temperature-controlled parts is then used as the corresponding target cooling source power. The target cooling source powers corresponding to different temperature-controlled parts together form the cooling capacity distribution result.

[0096] After each cooling capacity adjustment, the current temperature, heat source power, and cold source power data of the CNC machine tool are reacquired, and the subsequent prediction time range is re-established based on the new current thermal state. Therefore, the target cold source power is not constant throughout the entire machining process, but is continuously updated according to the actual thermal state of the CNC machine tool.

[0097] By simultaneously using the thermal deformation amount and rate of thermal deformation in multiple subsequent time steps to determine the future thermal state of the structure, and using the future thermal deformation amount to remain within the allowable range as the condition for determining the target cold source power, the cold energy distribution can directly correspond to the thermal deformation of the structure that needs to be suppressed, reducing the situation of insufficient heat dissipation or no targeted heat dissipation when fixed cold energy control or threshold control is only based on the current temperature.

[0098] The second embodiment of the present invention is further explained as follows: the deformation calculation model is established based on the thermoelastic mechanics theory, the temperature field distribution of the CNC machine tool structural component is determined according to the temperature data, and the thermal deformation of the CNC machine tool structural component is determined according to the temperature field distribution; The heat dissipation status of the corresponding temperature-controlled parts is adjusted according to the target cold source power corresponding to the different temperature-controlled parts.

[0099] In practice, the deformation calculation model is used to establish the correspondence between the temperature field and thermally induced deformation of the CNC machine tool structural components. Based on the theory of thermoelasticity, when different locations of the CNC machine tool structural components are subjected to different temperatures, different regions generate thermal strains corresponding to the temperature changes. These thermal strains, under the combined action of the structural shape and constraint relationships of the CNC machine tool structural components, form corresponding thermal deformations.

[0100] Based on temperature data obtained from different locations of the CNC machine tool structural components and the corresponding spatial locations of each temperature data point, the temperature field distribution of the CNC machine tool structural components is determined. For structural areas where temperature monitoring locations are not directly set, a corresponding temperature field state can be established based on the spatial temperature distribution reflected by the obtained temperature data, so that the temperature field can characterize the temperature changes in different areas of the CNC machine tool structural components.

[0101] The temperature field distribution is used as the thermal load basis for the deformation calculation model. The amount of thermal deformation caused by temperature change is determined based on the structural shape of the CNC machine tool component, the thermoelastic response of the material, and the structural constraint relationship. For subsequent time steps, the temperature field state of the corresponding time step is determined, and the thermal deformation amount corresponding to each time step is obtained by using the same temperature field and structural thermal deformation calculation relationship, thereby forming the thermal deformation prediction result for subsequent time periods.

[0102] After determining the target cold source power for different temperature-controlled parts, the heat dissipation state of the corresponding temperature-controlled parts is adjusted accordingly. In the implementation method of using the air-cooled vapor chamber heat dissipation unit 10 for heat dissipation, the airflow state through the fins 12 can be adjusted by changing the speed of the fan 13 at the corresponding position, thereby changing the heat exchange capacity of the corresponding air-cooled vapor chamber heat dissipation unit 10 and thus changing the heat dissipation state of the corresponding temperature-controlled parts according to the target cold source power.

[0103] The heat dissipation states of different temperature-controlled components collectively alter the subsequent temperature field development of the CNC machine tool's structural components. After the new heat dissipation state takes effect, the actual temperature data is re-acquired, and the subsequent thermal deformation state is re-determined based on the updated temperature field. By continuously updating the thermal deformation prediction results and the target cooling source power, the control process is continuously corrected as the actual temperature of the CNC machine tool's structural components changes.

[0104] Since the structural components of CNC machine tools have a certain time response process from changes in heat dissipation state to changes in temperature field and changes in structural thermal deformation, the required heat dissipation adjustment amount can be determined in advance at the current control moment by predicting the temperature field and thermal deformation amount at multiple subsequent time steps, thereby incorporating the time delay of temperature response into the control process.

[0105] By establishing a thermoelastic mechanical calculation relationship between the temperature field and thermal deformation of CNC machine tool structural components, the object of cooling capacity adjustment is shifted from simple local temperature to structural thermal deformation that directly affects the machining accuracy of CNC machine tools. Furthermore, by separately adjusting the heat dissipation state of different temperature-controlled parts, the subsequent temperature field and thermal deformation development process are changed, thereby suppressing the thermal deformation of CNC machine tool structural components caused by complex non-uniform temperature fields and improving the thermal accuracy stability during CNC machine tool operation.

[0106] The terms “first”, “second”, etc., are used to distinguish similar objects, not to describe or indicate a specific order or sequence.

[0107] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0108] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A temperature control system for a distributed air-cooled vapor chamber CNC machine tool, characterized in that, It includes multiple air-cooled heat dissipation units (10), temperature monitoring units (20) and control units (30). Multiple air-cooled heat dissipation units (10) are respectively disposed in different temperature control parts of the CNC machine tool (1). Each air-cooled heat dissipation unit (10) includes a heat exchange plate (11) and an air-cooled heat exchange component (14) connected to the heat exchange plate (11). The temperature monitoring unit (20) is connected to the control unit (30) and is used to acquire temperature data at different positions of the CNC machine tool (1); The control unit (30) is connected to multiple air-cooled heat dissipation units (10) respectively, and is used to determine the thermal deformation state of the CNC machine tool (1) in a subsequent time period based on the temperature data, heat source power data, cold source power data and deformation calculation model, determine the cooling capacity distribution results of the multiple air-cooled heat dissipation units (10) respectively according to the thermal deformation state, and adjust the operating state of the corresponding air-cooled heat dissipation units (10) according to the cooling capacity distribution results.

2. The distributed air-cooled heat exchange plate CNC machine tool temperature control system according to claim 1, characterized in that, The air-cooled heat exchange component (14) includes fins (12) and a fan (13). The fins (12) are connected to the heat exchange plate (11), and the fan (13) is located on one side of the fins (12) to drive air to flow through the fins (12).

3. The distributed air-cooled heat exchanger plate temperature control system for CNC machine tools according to claim 2, characterized in that, The temperature distribution plate (11) includes a support column (111), a working fluid (112), a first liquid-absorbing core (113), and a second liquid-absorbing core (114). The first liquid-absorbing core (113) is disposed on the evaporation surface of the temperature distribution plate (11), and the second liquid-absorbing core (114) is disposed on the condensation surface of the temperature distribution plate (11). The capillary driving force of the first liquid-absorbing core (113) is greater than that of the second liquid-absorbing core (114), and the flow resistance of the second liquid-absorbing core (114) is less than that of the first liquid-absorbing core (113).

4. The distributed air-cooled heat exchange plate CNC machine tool temperature control system according to claim 3, characterized in that, The first liquid-absorbing core (113) is a sintered liquid-absorbing core, and the second liquid-absorbing core (114) is a grooved liquid-absorbing core.

5. The distributed air-cooled heat spreader CNC machine tool temperature control system according to claim 1, characterized in that, Multiple air-cooled heat dissipation units (10) are respectively set at different temperature control locations determined according to the heat source spatial distribution characteristics and temperature change characteristics of the CNC machine tool (1).

6. The distributed air-cooled heat spreader CNC machine tool temperature control system according to claim 1, characterized in that, The temperature monitoring unit (20) includes a sensor driver board (21), which is connected to the control unit (30). The temperature data collected by the temperature monitoring unit (20) is transmitted to the control unit (30) via the sensor driver board (21).

7. The distributed air-cooled heat exchange plate CNC machine tool temperature control system according to claim 2, characterized in that, It also includes a fan drive board (31), which is connected to the control unit (30) and the fans (13) of the multiple air-cooled heat dissipation units (10); The control unit (30) is used to determine the amount of thermal deformation and the rate of thermal deformation in subsequent time steps based on the temperature data, the heat source power data, the cold source power data and the deformation calculation model, and when the amount of thermal deformation and the rate of thermal deformation exceed the corresponding allowable range, determine the target cold source power corresponding to the multiple air-cooled heat dissipation units (10), and adjust the speed of the corresponding fan (13) according to the target cold source power through the fan drive board (31).

8. A method for temperature control in a CNC machine tool with a distributed air-cooled heat spreader, characterized in that, include: Acquire temperature data, heat source power data, and cold source power data at different locations of structural components in a CNC machine tool; Based on the temperature data, the heat source power data, the cold source power data, and the deformation calculation model, the thermal deformation state of the CNC machine tool structural component in the subsequent time period is determined; Based on the thermal deformation state, the cold energy distribution results corresponding to different temperature-controlled parts are determined respectively; Based on the cooling capacity distribution results corresponding to different temperature-controlled parts, the heat dissipation state of the corresponding temperature-controlled parts is adjusted respectively.

9. The temperature control method for CNC machine tools with distributed air-cooled heat spreader according to claim 8, characterized in that, Determining the thermal deformation state of the CNC machine tool structural component over a subsequent time period includes: Based on the temperature data, the heat source power data, the cold source power data, and the deformation calculation model, the thermal deformation amount and thermal deformation rate for multiple subsequent time steps are determined. Determine whether the amount of thermal deformation and the rate of thermal deformation exceed the corresponding allowable range; When the thermal deformation amount and the thermal deformation rate exceed the corresponding allowable range, a target cold source power is determined to keep the thermal deformation amount within the corresponding allowable range for subsequent multiple time steps, and the cold energy distribution result is formed according to the target cold source power corresponding to different temperature control parts.

10. The temperature control method for CNC machine tools with distributed air-cooled heat exchange plates according to claim 9, characterized in that, The deformation calculation model is based on the thermoelastic mechanics theory. The temperature field distribution of the CNC machine tool structural component is determined according to the temperature data, and the thermal deformation of the CNC machine tool structural component is determined according to the temperature field distribution. The heat dissipation status of the corresponding temperature-controlled parts is adjusted according to the target cold source power corresponding to the different temperature-controlled parts.

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