A digital testing method, device, equipment and medium for milling heat load

Abstract

The present application relates to a digital testing method, device, equipment and medium for milling heat load. The method includes obtaining the current milling temperature of a workpiece to be machined and the residual waste water temperature corresponding to the previous cooled workpiece, calculating the temperature rise steady-state temperature when the current machining process reaches the cooling temperature balance, calculating the heat of water vapor evaporation in the steady-state stage corresponding to the temperature rise steady-state temperature, calculating the evaporation heat load in the current steady-state stage according to the heat of water vapor evaporation, respectively obtaining the absorbed heat of the workpiece to be machined and the corresponding milling cutter, calculating the absorbed heat load of the milled workpiece according to the absorbed heat, performing finite element analysis on the milling heat of the current milling process according to the evaporation heat load and the absorbed heat load, and estimating the milling heat load of the workpiece to be machined corresponding to the steady-state stage according to the analysis result. The present application has the effect of improving the testing accuracy of the milling heat load and reducing the error influence of the heat dispersed absorption during the workpiece milling process on the current milling heat load.

Description

Technical Field

[0001] The present invention relates to the technical field of heat load calculation, and in particular to a digital testing method, device, equipment and medium for milling heat load. Background Art

[0002] Currently, during the machining process of die-casting and milling different metals into workpieces by a numerically controlled machine tool, it is often necessary to pour cold water to reduce the high temperature during the workpiece machining process, which not only reduces the working temperature of the machine tool but also accelerates the cooling of the workpiece finished product. Therefore, when planning the cooling process for different workpiece machining processes, it is necessary to accurately test the milling heat load of the machine tool to improve the cooling performance of the cooling process.

[0003] The existing testing method for milling heat load is usually to collect the initial temperature of the cold water in the cold water pipeline and the temperature of the waste water obtained after the workpiece is cooled, and test the current heat load performance according to the temperature difference between the waste water temperature and the initial temperature of the cold water. However, the high temperature generated during the milling process of the workpiece will be absorbed by the milling tool and the cooling water, and the difference in the workpiece material will also cause differences in the heat absorption capacity of the workpiece, and the dispersed absorption of heat will cause errors in the milling heat load test.

[0004] In view of the above related technologies, the existing testing method for milling heat load has the defect that the dispersed absorption of milling heat is likely to cause inaccurate testing of the milling heat load. Summary of the Invention

[0005] In order to improve the accuracy of digital testing of milling heat load and reduce the error influence of the dispersed absorption of heat during the milling process of the workpiece on the current milling heat load, the present application provides a digital testing method, device, equipment and medium for milling heat load.

[0006] The first invention object of the present application is achieved through the following technical solutions:

[0007] A digital testing method for milling heat load includes:

[0008] Obtaining the current milling temperature of the workpiece to be machined and the residual waste water temperature corresponding to the previous cooled workpiece, and calculating the steady-state temperature of temperature rise when the current machining process reaches the cooling temperature balance;

[0009] Calculating the heat released by water vapor evaporation in the steady-state stage corresponding to the steady-state temperature of temperature rise, and calculating the evaporation heat load in the current steady-state stage according to the heat released by water vapor evaporation;

[0010] Respectively obtaining the absorbed heat of the workpiece to be machined and the corresponding milling tool, and calculating the absorbed heat load of the milled workpiece according to the absorbed heat;

[0011] According to the heat dissipation load and the heat absorption load, perform a finite element analysis on the milling heat of the current milling process, and estimate the milling heat load of the workpiece to be machined corresponding to the steady state stage according to the analysis results.

[0012] By adopting the above technical solution, calculate the steady-state temperature rise corresponding to the current machining process through the current milling temperature of the current workpiece to be machined and the residual waste water temperature corresponding to the previous cooled workpiece, which helps to accurately calculate the heat exchange time required for the workpiece to be machined to reach the cooling temperature balance under the current machining process. Then, calculate according to the heat dissipation of water vapor in the steady state stage at the steady-state temperature rise, and further calculate the heat dissipation load in the current steady state stage according to the heat dissipation of water vapor, which helps to accurately calculate the heat load corresponding to the milling heat taken away by the water vapor volatilization, reduce the calculation error of the milling heat load caused by the water vapor volatilization, and calculate the heat absorption load of the heat absorbed by the milling tool according to the heat absorbed by the workpiece to be machined and the corresponding milling tool during the milling process, which helps to perform multi-dimensional calculations on the dispersed heat during the milling process and improve the comprehensiveness of the milling heat load calculation. Thus, according to the heat dissipation load and the heat absorption load, perform a finite element analysis on the milling heat during the current milling process, divide the milling process into multiple homogeneous change units for milling heat change simulation, so as to unitize the complex milling heat change process, which helps to more accurately estimate the milling heat load of the workpiece to be machined corresponding to the steady state stage, and combine the milling heat with different divergence degrees in each milling stage to reduce the error influence of the heat dispersion absorption during the workpiece milling process on the current milling heat load, thereby improving the accuracy of the digital test of the milling heat load.

[0013] In a preferred example of the present application, it can be further configured as: calculating the heat dissipation of water vapor in the steady state stage corresponding to the steady-state temperature rise, and calculating the heat dissipation load in the current steady state stage according to the heat dissipation of water vapor, specifically including:

[0014] Obtain the complete machining time of the workpiece to be machined, and calculate the current milling heat corresponding to the workpiece to be machined according to the complete machining time and the current milling temperature;

[0015] Calculate the residual milling heat of the residual waste water temperature, and calculate the heat dissipation of water vapor in the steady state stage corresponding to the steady-state temperature rise according to the current milling heat and the residual milling heat;

[0016] Obtain the temperature rise time for the current machining process to reach the current steady state stage, and calculate the cumulative environmental heat corresponding to the temperature rise time;

[0017] Calculate the heat dissipation load in the current steady state stage according to the heat dissipation of water vapor and the cumulative environmental heat.

[0018] By adopting the above technical solution, the current milling heat of the workpiece to be machined is accurately calculated based on the complete machining time of the workpiece to be machined and the current milling temperature, and the change of milling heat is accurately determined during the machining process of each workpiece to be machined. By calculating the residual milling heat of the current residual wastewater temperature, it helps to accurately calculate the water vapor evaporation heat in the steady-state stage corresponding to the steady-state temperature rise according to the current milling heat and the residual milling heat, improving the calculation accuracy of the milling heat dispersed by water vapor evaporation in the steady-state stage. When the current machining process reaches the current steady-state stage, the corresponding temperature rise time is obtained, and the cumulative environmental heat released from the current milling temperature into the milling environment during the current temperature rise time is calculated, which helps to accurately calculate the influence of environmental heat in the steady-state stage. Through the water vapor evaporation heat and the cumulative environmental heat, the evaporation heat load in the current steady-state stage is comprehensively calculated, improving the calculation accuracy of the evaporation heat load in the steady-state stage.

[0019] In a preferred example of the present application, it can be further configured that: obtaining the current milling temperature of the workpiece to be machined and the residual wastewater temperature corresponding to the previous cooled workpiece, and calculating the steady-state temperature rise temperature when the current machining process reaches the cooling temperature balance, further includes:

[0020] Calculating the initial temperature rise coefficient of the residual wastewater temperature in the rapid temperature rise stage;

[0021] According to the initial temperature rise coefficient, determining the stage transition node at which the residual wastewater temperature has a residual temperature influence on the current milling temperature;

[0022] When the actual milling progress of the current machining process reaches the stage transition node, calculating the steady-state transition coefficient between the current residual wastewater temperature and the current milling temperature;

[0023] According to the steady-state transition coefficient, calculating the transition heat load in the steady-state transition stage of the current machining process.

[0024] By adopting the above technical solution, when the cooling water starts to cool the first workpiece, the initial heating coefficient of the residual wastewater temperature in the rapid heating stage is calculated until the residual wastewater temperature reaches temperature equilibrium in adjacent cooling conditions, indicating that the rapid heating stage reaches the stage transition node. That is, when the initial heating coefficients of adjacent cooled workpieces show an equilibrium state, it enters the stage transition node where the residual wastewater temperature has an impact on the current milling temperature. When the actual milling progress of the current processing technology reaches the stage transition node, according to the current residual wastewater temperature and the current milling temperature at the stage transition node, the steady-state transition coefficient of the mutually influential residual wastewater temperature and the current milling temperature in the transition stage is calculated, which helps to jointly judge the heat change situation of the mutually influential residual wastewater temperature and the current milling temperature, accurately calculate the transition heat load of the current processing technology in the steady-state transition stage according to the steady-state transition coefficient, and improve the accurate calculation of the heat dissipation in the transition stage under the mutually influential state.

[0025] In a preferred example of the present application, it can be further configured as follows: calculating the transition heat load of the current processing technology in the steady-state transition stage according to the steady-state transition coefficient specifically includes:

[0026] When the current residual wastewater temperature reaches the stability of heat absorption and heat dissipation, obtain the transition time of the steady-state transition stage;

[0027] According to the steady-state transition coefficient and the corresponding transition time, calculate the transition heat dissipation of the current milling temperature;

[0028] Obtain the steady-state specific heat capacity of the current residual wastewater temperature after the end of the transition time;

[0029] According to the transition heat dissipation and the corresponding steady-state specific heat capacity, calculate the transition heat load of the current processing technology in the steady-state transition stage.

[0030] By adopting the above technical solution, when the temperature of the current residual wastewater reaches the stability of heat absorption and heat dissipation, obtaining the transition time in the steady-state transition stage helps to comprehensively calculate the heat dissipated into the environment during the transition time, and calculate the transitional heat dissipated from the current milling temperature according to the steady-state transition coefficient and the corresponding transition time, so as to comprehensively calculate the total heat dissipated into the milling environment during the transition time, improve the calculation accuracy of the transitional heat dissipated, and obtain the steady-state specific heat capacity of the current residual wastewater after the transition time ends, which helps to calculate the actual heat load of the residual wastewater with balanced heat absorption and heat dissipation according to the steady-state specific heat capacity. Further, according to the transitional heat dissipated and the corresponding steady-state specific heat capacity, calculate the transitional heat load in the steady-state transition stage of the current processing technology, realize the targeted calculation of the heat load in each stage, and improve the calculation accuracy of the heat load of the workpiece to be processed in each milling stage.

[0031] In a preferred example of the present application, it can be further configured that: respectively obtaining the absorbed heat of the workpiece to be processed and the corresponding milling tool, and calculating the absorbed heat load of the milled workpiece according to the absorbed heat, specifically including:

[0032] Obtaining the workpiece thermal conductivity of the workpiece to be processed, and calculating the workpiece absorbed heat of the workpiece to be processed according to the workpiece thermal conductivity;

[0033] Obtaining the tool thermal conductivity of the milling tool, and calculating the tool absorbed heat of the milling tool according to the tool thermal conductivity;

[0034] Calculating the difference in absorbed heat between adjacent milling conditions according to the workpiece absorbed heat and the tool absorbed heat;

[0035] Calculating the absorbed heat load of the milled workpiece corresponding to each milling process according to the difference in absorbed heat.

[0036] By adopting the above technical solution, according to the thermal conductivity of the workpiece and tool materials, respectively obtaining the workpiece thermal conductivity of the workpiece to be processed and the tool thermal conductivity of the milling tool, and respectively calculating the corresponding workpiece absorbed heat and tool absorbed heat, helps to accurately calculate the absorbed heat absorbed by the workpiece and tool into the raw materials, increase the reference dimension for calculating the milling heat load, and judge the heat dissipation performance and heat absorption performance of the tool and material under adjacent milling conditions through the difference in absorbed heat between adjacent milling conditions. According to different heat absorption and heat dissipation performances, accurately calculate the absorbed heat of the corresponding materials, so as to accurately calculate the absorbed heat load of the milled workpiece finished product obtained by each milling process according to the difference in absorbed heat caused by the thermal conductivity of the current tool material and workpiece material, which helps to improve the correlation between the calculation result of the absorbed heat load of the milled workpiece finished product and the corresponding material thermal conductivity.

[0037] In a preferred example, the present application can be further configured as follows: calculating the absorbed heat load of the milled workpiece corresponding to each milling process according to the difference in absorbed heat, specifically including:

[0038] Obtaining the tool waiting time between the switching of two adjacent milled workpieces;

[0039] Calculating the tool cooling temperature corresponding to the tool waiting time, and calculating the initial milling temperature at the position where the tool contacts the workpiece to be machined according to the tool cooling temperature difference;

[0040] Calculating the temperature cooling ratio between the initial milling temperature and the current milling temperature;

[0041] Calculating the absorbed heat load of each milled workpiece according to the temperature cooling ratio and the difference in absorbed heat.

[0042] By adopting the above technical solution, between the switching of two adjacent milled workpieces, obtaining the tool waiting time from the end of the previous milled workpiece to the start of the next milled workpiece helps to calculate the self-cooling temperature during the tool waiting time, and according to the calculation of the tool cooling temperature difference caused by the self-heat dissipation performance of the tool during the tool waiting time, accurately control the temperature influence of the tool's own milling temperature on the milling working conditions, and further calculate the initial milling temperature at the position where the tool contacts the workpiece to be machined, which helps to calculate the heating rate of the milling temperature of the workpiece to be machined according to the initial milling temperature, improve the calculation accuracy of the heating heat change of the milling temperature, and independently correct the milling temperature of each workpiece to be machined by calculating the temperature cooling ratio between the initial milling temperature and the current milling temperature, improve the calculation accuracy of the dissipated heat during the heating process of the milling temperature, and calculate the absorbed heat load of each milled workpiece according to the temperature cooling ratio and the difference in absorbed heat, and combine the dissipated heat of the tool with the difference in absorbed heat of the workpiece to improve the calculation accuracy of the absorbed heat load of the milled workpiece.

[0043] In a preferred example, the present application can be further configured as follows: performing a finite element analysis on the milling heat of the current milling process according to the volatile heat load and the absorbed heat load, and estimating the milling heat load of the workpiece to be machined corresponding to the steady state stage according to the analysis result, specifically including:

[0044] Calculating the stage heat change coefficient corresponding to each milling stage of the current milling process according to the volatile heat load and the absorbed heat load;

[0045] Performing a finite element analysis on the milling heat of the current milling process according to the stage heat change coefficient to obtain a steady state equilibrium point where the absorbed heat and the volatile heat reach dynamic equilibrium;

[0046] Obtain the steady-state milling heat and the corresponding milling environment temperature in the steady-state stage after reaching the steady-state balance point;

[0047] Calculate the corresponding steady-state environment heat according to the milling environment temperature, and calculate the milling heat load of the workpiece to be machined in the current steady-state stage according to the steady-state milling heat and the steady-state environment heat.

[0048] By adopting the above technical solution, calculating the stage heat change coefficient of each milling stage in the current milling process according to the heat dissipation load and heat absorption load during the milling process of the workpiece to be machined helps to calculate the non-linear temperature rise change during the milling process of the machine tool in stages, improve the pertinence of the heat change calculation in the entire milling process, and perform finite element analysis on the milling heat in the current milling process according to the corresponding stage heat change coefficient, dividing the change of the milling heat into multiple finite element units with uniform change, thereby improving the calculation accuracy of each finite element unit, quickly calculating the heat balance between the absorbed heat and the dissipated heat in each finite element unit, so as to quickly find the steady-state balance point where the absorbed heat and the dissipated heat reach dynamic balance, which helps to accurately judge the stage switching node between the steady-state transition stage and the steady-state stage, and thus can accurately obtain the steady-state milling heat and the corresponding milling environment temperature in the steady-state stage, which helps to calculate the steady-state environment heat approaching the saturation state, reduce the error of the milling heat load calculation caused by the change of the steady-state environment heat during the milling process. Further, for the steady-state milling heat and the steady-state environment heat whose temperature change approaches equilibrium, calculate the milling heat load generated in the milling working condition of the workpiece to be machined in the current steady-state stage, reduce the calculation error of the milling heat load caused by the scattered heat such as heat replacement in the milling environment, heat absorbed by the tool and heat absorbed by the workpiece, and improve the accuracy of the digital test of the milling heat load.

[0049] The second above-mentioned invention object of the present application is achieved through the following technical solutions:

[0050] A digital test device for milling heat load, comprising:

[0051] A data acquisition module, configured to acquire the current milling temperature of the workpiece to be machined and the residual waste water temperature corresponding to the previous cooled workpiece, and calculate the temperature rise steady-state temperature when the current processing technology reaches the cooling temperature balance;

[0052] A volatilization data calculation module, configured to calculate the water vapor heat dissipation in the steady-state stage corresponding to the temperature rise steady-state temperature, and calculate the heat dissipation load in the current steady-state stage according to the water vapor heat dissipation;

[0053] An absorption data calculation module is used to respectively obtain the absorbed heat of the workpiece to be machined and the corresponding milling cutter, and calculate the absorbed heat load of the milled workpiece according to the absorbed heat.

[0054] A data analysis module is used to perform finite element analysis on the milling heat of the current milling process according to the volatilization heat load and the absorbed heat load, and estimate the milling heat load of the workpiece to be machined corresponding to the steady state stage according to the analysis result.

[0055] By adopting the above technical solution, the steady-state temperature rise corresponding to the current processing technology is calculated through the current milling temperature of the current workpiece to be machined and the residual waste water temperature corresponding to the previous cooled workpiece, which helps to accurately calculate the heat exchange time required for the workpiece to be machined to reach the cooling temperature balance under the current processing technology. Then, the heat volatilization amount of water vapor in the steady state stage is calculated according to the steady-state temperature rise, and further the volatilization heat load in the current steady state stage is calculated according to the heat volatilization amount of water vapor, which helps to accurately calculate the heat load corresponding to the milling heat taken away by the water vapor volatilization, reduce the calculation error of the milling heat load caused by the water vapor volatilization, and calculate the absorbed heat load of the heat absorbed by the milling tool according to the absorbed heat of the workpiece to be machined and the corresponding milling cutter during the milling process, which helps to perform multi-dimensional calculation on the dispersed heat during the milling process and improve the comprehensiveness of the milling heat load calculation. Then, according to the volatilization heat load and the absorbed heat load, finite element analysis is performed on the milling heat in the current milling process, and the milling process is divided into multiple homogeneous units for simulation of the milling heat change, so as to unitize the complex milling heat change process, which helps to more accurately estimate the milling heat load of the workpiece to be machined corresponding to the steady state stage, and combine the milling heat with different divergence degrees in each milling stage to reduce the error influence of the heat dispersed absorption during the workpiece milling process on the current milling heat load, thereby improving the accuracy of the digital test of the milling heat load.

[0056] The above object three of the present application is achieved by the following technical solution:

[0057] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the above digital test method for milling heat load are implemented.

[0058] The above object four of the present application is achieved by the following technical solution:

[0059] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the above digital test method for milling heat load are implemented.

[0060] In summary, the present application includes at least one of the following beneficial technical effects:

[0061] 1. By using the current milling temperature of the workpiece to be machined and the residual wastewater temperature corresponding to the previous cooled workpiece, the steady-state temperature rise corresponding to the current machining process is calculated, which helps to accurately calculate the heat exchange time required for the workpiece to be machined to reach the cooling temperature balance under the current machining process. Then, based on the heat dissipated by water vapor evaporation in the steady-state stage at the steady-state temperature rise, the heat dissipation load in the current steady-state stage is calculated. Further, based on the heat dissipated by water vapor evaporation, the heat dissipation load corresponding to the milling heat carried away by water vapor evaporation is accurately calculated, reducing the calculation error of the milling heat load caused by water vapor evaporation. And according to the heat absorbed by the workpiece to be machined and the corresponding milling tool during milling, the absorption heat load of the heat absorbed by the milling tool is calculated, which helps to perform multi-dimensional calculations on the heat dissipated during milling, improving the comprehensiveness of the milling heat load calculation. Thus, based on the heat dissipation load and the absorption heat load, finite element analysis of the milling heat during the current milling process is carried out, dividing the milling process into multiple homogenously changing units for milling heat change simulation, thereby unitizing the complex milling heat change process, which helps to more accurately estimate the milling heat load of the workpiece to be machined corresponding to the steady-state stage, and combining the milling heat with different divergence degrees in each milling stage, reducing the error impact of the heat dispersed absorption during the workpiece milling process on the current milling heat load, and thus improving the accuracy of the digital test of the milling heat load;

[0062] 2. By using the complete machining time of the workpiece to be machined and the current milling temperature, the current milling heat of the workpiece to be machined is accurately calculated, and the milling heat change is refined to the machining process of each workpiece to be machined. And by calculating the residual milling heat of the current residual wastewater temperature, it helps to accurately calculate the heat dissipated by water vapor evaporation in the steady-state stage corresponding to the steady-state temperature rise based on the current milling heat and the residual milling heat, improving the calculation accuracy of the milling heat dispersed by water vapor evaporation in the steady-state stage. When the current machining process reaches the current steady-state stage, the corresponding temperature rise time is obtained, and the cumulative heat dissipated into the milling environment by the current milling temperature during the current temperature rise time is calculated, which helps to accurately calculate the influence of the environmental heat in the steady-state stage. Through the heat dissipated by water vapor evaporation and the cumulative environmental heat, the heat dissipation load in the current steady-state stage is comprehensively calculated, improving the calculation accuracy of the heat dissipation load in the steady-state stage;

[0063] 3. When the cooling water starts to cool the first workpiece, calculate the initial heating coefficient of the residual wastewater temperature in the rapid heating stage until the residual wastewater temperature reaches temperature equilibrium in adjacent cooling conditions, indicating that the rapid heating stage reaches the stage transition node. That is, when the initial heating coefficients of adjacent cooling workpieces show an equilibrium state, it enters the stage transition node where the residual wastewater temperature affects the current milling temperature. When the actual milling progress of the current processing technology reaches the stage transition node, calculate the steady-state transition coefficient of the residual wastewater temperature and the current milling temperature that affect each other in the transition stage based on the current residual wastewater temperature and the current milling temperature at the stage transition node. This helps to jointly judge the heat change situation of the residual wastewater temperature and the current milling temperature that affect each other, accurately calculate the transition heat load of the current processing technology in the steady-state transition stage according to the steady-state transition coefficient, and accurately calculate the heat dissipation in the transition stage under the state of mutual influence. Description of the Drawings

[0064] Figure 1 is the implementation flowchart of a digital testing method for milling heat load according to an embodiment of the present application.

[0065] Figure 2 is the implementation flowchart of calculating milling heat and residual temperature influence coefficient in the digital testing method for milling heat load.

[0066] Figure 3 is the implementation flowchart of step S104 of a digital testing method for milling heat load according to an embodiment of the present application.

[0067] Figure 4 is the implementation flowchart of step S20 of a digital testing method for milling heat load according to an embodiment of the present application.

[0068] Figure 5 is the implementation flowchart of step S30 of a digital testing method for milling heat load according to an embodiment of the present application.

[0069] Figure 6 is the implementation flowchart of step S304 of a digital testing method for milling heat load according to an embodiment of the present application.

[0070] Figure 7 is the implementation flowchart of step S40 of a digital testing method for milling heat load according to an embodiment of the present application.

[0071] Figure 8 is the structural block diagram of a digital testing device for milling heat load according to an embodiment of the present application.

[0072] Figure 9 is the internal structural schematic diagram of a computer device for implementing a digital testing method for milling heat load. Detailed implementation manners

[0073] The present application will be further described in detail below with reference to the accompanying drawings.

[0074] In one embodiment, as Figure 1 shown, the present application discloses a digital testing method for milling heat load, which specifically includes the following steps:

[0075] S10: Obtain the current milling temperature of the workpiece to be machined and the residual waste water temperature corresponding to the previous cooled workpiece, and calculate the steady-state temperature rise when the current machining process reaches the cooling temperature balance.

[0076] Specifically, obtain the heat change situation between the workpiece to be machined and the milling cutter during the milling process through a preset infrared thermal induction device, and use the milling temperature at the contact position between the workpiece to be machined and the milling cutter as the current milling temperature of the workpiece to be machined. Collect the real-time temperature of the residual waste water through a temperature sensor preset in the waste water tank or waste water collection tank, so as to obtain the residual waste water temperature at the end of the previous cooled workpiece. When the temperature difference between the residual waste water temperatures under adjacent milling conditions approaches equality within the error range, it indicates that the current machining process has reached the cooling temperature balance, and then use the milling temperature at the milling position of the current workpiece to be machined and the milling cutter as the steady-state temperature rise.

[0077] In one embodiment, in order to accurately calculate the mutual influence of the milling heat during the steady-state transition stage, as Figure 2 shown, after step S10, it further includes:

[0078] S101: Calculate the initial temperature rise coefficient of the residual waste water temperature in the rapid temperature rise stage.

[0079] Specifically, when the machine tool starts to perform the initial machining on the workpiece to be machined, obtain the residual waste water temperature of the first workpiece to be machined, and sequentially obtain the adjacent residual waste water temperatures of the workpiece to be machined until the difference between the adjacent residual waste water temperatures approaches equality, then judge that the rapid temperature rise stage ends. Use the cooling time of two adjacent workpieces to be machined as the unit time, and calculate the temperature rise rate of the difference between the adjacent residual waste water temperatures within the unit time as the initial temperature rise coefficient.

[0080] S102: According to the initial temperature rise coefficient, judge the stage transition node at which the residual waste water temperature has a residual temperature influence on the current milling temperature.

[0081] Specifically, according to the initial heating-up coefficient of adjacent workpieces to be processed, calculate the change in the heating-up coefficient during the rapid heating-up stage, and plot it as a heating-up coefficient change curve based on the milling time. According to the heating-up coefficient change curve, when the initial heating-up coefficients approach the same value, it indicates that the temperatures of the residual wastewater generated by adjacent workpieces to be processed approach the same value. At this time, the absorption of milling heat by the residual wastewater approaches saturation, and the temperature of the residual wastewater will volatilize the milling heat stored in the wastewater into the milling environment at the current milling temperature. Therefore, the time node when the initial heating-up coefficients approach the same value is used as the stage transition stage corresponding to the influence of the residual temperature.

[0082] S103: When the actual milling progress of the current processing technology reaches the stage transition node, calculate the steady-state transition coefficient between the current residual wastewater temperature and the current milling temperature.

[0083] Specifically, when the actual milling progress of the current processing technology reaches the stage transition node, that is, when the current residual wastewater temperature approaches saturation, take the ratio between the current residual wastewater temperature and the current milling temperature as the steady-state transition coefficient corresponding to the stage transition stage.

[0084] S104: Calculate the transition heat load of the current processing technology during the steady-state transition stage according to the steady-state transition coefficient.

[0085] Specifically, as Figure 3 shown, step S104 specifically includes the following steps:

[0086] S1041: When the current residual wastewater temperature reaches the stability of heat absorption and heat dissipation, obtain the transition time during the steady-state transition stage.

[0087] Specifically, obtain the heat absorption and heat dissipation at the current residual wastewater temperature. The heat absorption can be obtained from the temperature change value of the wastewater tank after adding the real-time cooling wastewater of the workpiece to be processed into the existing wastewater in the wastewater tank. Similarly, the heat dissipation can be obtained from the temperature change of the residual wastewater in the wastewater tank during the period when waiting for the cooling wastewater to flow in.

[0088] S1042: Calculate the transition volatilization heat of the current milling temperature according to the steady-state transition coefficient and the corresponding transition time.

[0089] Specifically, according to the steady-state transition coefficient and the corresponding transition time, take the product of the temperature difference between the current milling heat and the residual wastewater temperature of the corresponding milling workpiece multiplied by the steady-state transition coefficient as the unit volatilization heat at the current milling time, and take the product of the unit volatilization heat and the transition time as the transition volatilization heat during the steady-state transition stage.

[0090] S1043: Obtain the steady-state specific heat capacity of the current residual wastewater temperature after the transition time ends.

[0091] Specifically, at the end of the transition time, the heat absorption and heat dissipation of the current residual wastewater temperature reach a dynamic equilibrium. The current residual wastewater volume in the current wastewater tank is obtained, and the corresponding steady-state specific heat capacity is obtained according to the ratio of the current residual wastewater temperature to the current residual wastewater volume.

[0092] S1044: Calculate the transition heat load of the current processing technology in the steady-state transition stage according to the transition heat of volatilization and the corresponding steady-state specific heat capacity.

[0093] Specifically, according to the obtained transition heat of volatilization and the corresponding steady-state specific heat capacity in the steady-state transition stage, the product of the transition heat of volatilization and the current steady-state specific heat capacity is used as the transition heat load of the current processing technology.

[0094] S20: Calculate the heat of volatilization of water vapor in the steady-state stage corresponding to the steady-state temperature of temperature rise, and calculate the heat load of volatilization in the current steady-state stage according to the heat of volatilization of water vapor.

[0095] Specifically, as Figure 4 shown, step S20 specifically includes the following steps:

[0096] S201: Obtain the complete processing time of the workpiece to be processed, and calculate the current milling heat corresponding to the workpiece to be processed according to the complete processing time and the current milling temperature.

[0097] Specifically, when the workpiece raw material is fixed in the mold, the start time of processing the workpiece to be processed is calculated, and the end time of processing is obtained when the tool is removed after the workpiece to be processed is milled. The complete processing time of the workpiece to be processed is obtained according to the time difference between the end time of processing and the start time of processing. Assuming that the specific heat capacity of the workpiece to be processed is constant, the current milling heat of the workpiece to be processed is equal to the product of the complete processing time and the current milling temperature.

[0098] S202: Calculate the residual milling heat of the residual wastewater temperature, and calculate the heat of volatilization of water vapor in the steady-state stage corresponding to the steady-state temperature of temperature rise according to the current milling heat and the residual milling heat.

[0099] Specifically, combining the current specific heat capacity and wastewater volume of the current wastewater tank, according to the heat conversion formula, the product of the current specific heat capacity, wastewater volume and residual wastewater temperature is used as the residual milling heat. The temperature difference obtained by comprehensively subtracting the residual milling heat and the temperature difference of the steady-state temperature of temperature rise from the current milling heat is used as the water vapor volatilization temperature. And combining the real-time cooling water flow of the current workpiece to be processed, the single-workpiece water consumption volume of the current workpiece is calculated. Assuming that the temperature influence of the milling temperature in the steady-state stage on the specific heat capacity of water vapor is constant, combining the specific heat capacity of water vapor corresponding to the current milling temperature, the heat of volatilization of water vapor in the steady-state stage is equal to the product of the single-workpiece water consumption volume, water vapor volatilization temperature and specific heat capacity of water vapor. Among them, the specific heat capacity of water vapor is obtained by querying the existing specific heat capacity of water vapor at constant pressure comparison table.

[0100] S203: Obtain the heating-up time when the current processing technology reaches the current steady state stage, and calculate the cumulative environmental heat corresponding to the heating-up time.

[0101] Specifically, obtain the heating-up time when the current processing technology reaches the current steady state stage. For example, if the waiting processing heat dissipation coefficient of the workpiece to be processed is calculated based on the heating-up rate of the current processing technology and the milling temperature difference in the adjacent milling process, then the product of the milling temperature generated by each workpiece to be processed within the heating-up time and the waiting processing heat dissipation coefficient is used as the heat dissipation amount of a single workpiece, and the product of the heat dissipation amount of a single workpiece and the total number of workpieces processed during the heating-up time is used as the cumulative environmental heat corresponding to the heating-up time.

[0102] Among them, the cumulative environmental heat is the volatilization of the milling heat caused by the thermal conductivity of the milling tool and the workpiece material.

[0103] S204: Calculate the heat volatilization load under the current steady state stage according to the heat volatilized by water vapor and the cumulative environmental heat.

[0104] Specifically, the sum of the heat volatilized by water vapor and the cumulative environmental heat is used as the total milling heat volatilization of the machine tool under the current steady state stage. At this time, the milling volatilization temperature in the milling environment reaches saturation. By querying the specific heat capacity table of air and temperature, the specific heat capacity of the steady state air under the current steady state stage is obtained. Therefore, the heat volatilization load is equal to the product of the total milling heat volatilization, the specific heat capacity of the steady state air, and the volume of the milling groove.

[0105] S30: Respectively obtain the absorbed heat of the workpiece to be processed and the corresponding milling tool, and calculate the absorbed heat load of the milled workpiece according to the absorbed heat.

[0106] Specifically, as Figure 5 shown, step S30 specifically includes the following steps:

[0107] S301: Obtain the workpiece thermal conductivity of the workpiece to be processed, and calculate the workpiece absorbed heat of the workpiece to be processed according to the workpiece thermal conductivity.

[0108] Specifically, according to the workpiece material of the workpiece to be processed, such as obtaining the metal characteristics of the raw material of the workpiece and the hardness characteristics of the raw material through the processing drawing, etc., so as to judge the workpiece thermal conductivity of the workpiece to be processed according to the workpiece material, and the product of the current milling temperature, the workpiece thermal conductivity, and the single workpiece milling time is used as the workpiece absorbed heat of the workpiece to be processed.

[0109] S302: Obtain the tool thermal conductivity of the milling tool, and calculate the tool absorbed heat of the milling tool according to the tool thermal conductivity.

[0110] Specifically, based on the tool material of the milling tool, such as tool hardness, tool metal characteristics, etc., the tool thermal conductivity of the milling tool is judged according to the tool material. The product of the current milling temperature, the tool thermal conductivity, and the single milling time of the tool is used as the heat absorbed by the milling tool.

[0111] S303: Calculate the difference in heat absorption between adjacent milling conditions based on the heat absorbed by the workpiece and the heat absorbed by the tool.

[0112] Specifically, for example, when the tool starts the next round of milling work, the current tool temperature of the tool is collected. The difference between the heat absorbed by the tool and the current tool temperature is used as the difference in heat absorption of the tool between adjacent milling conditions. Since the milled workpiece with workpiece heat absorption will undergo the next round of cooling work and a new workpiece raw material will be replaced for the next milling work, the sum of the tool heat absorption difference and the workpiece heat absorption is used as the difference in heat absorption between adjacent milling conditions.

[0113] S304: Calculate the heat absorption load of the milled workpiece corresponding to each milling process according to the difference in heat absorption.

[0114] Specifically, as Figure 6 shown, step S304 specifically includes the following steps:

[0115] S3041: Obtain the tool waiting time between the switching of adjacent milled workpieces.

[0116] Specifically, after the previous milled workpiece is finished milling, start timing from when the tool stops milling work, including the time required for the tool to move away, the milled workpiece finished product to be removed from the mold, the new workpiece raw material to be fixed in the mold and the tool to be moved to the preset milling position until the tool abuts on the new workpiece raw material. Stop timing when the tool abuts on the preset milling position of the next workpiece raw material, so as to obtain the tool waiting time between the switching of adjacent milled workpieces.

[0117] S3042: Calculate the tool cooling temperature corresponding to the tool waiting time, and calculate the initial milling temperature at the contact position between the tool and the workpiece to be machined according to the tool cooling temperature difference.

[0118] Specifically, according to the tool material and the current milling environment temperature, calculate the heat dissipation coefficient of the milling tool. For example, the heat dissipation coefficient is the ratio of the temperature difference between the tool milling temperature and the current milling environment temperature to the unit time. The unit time is the time required for the tool milling temperature to adjust its own temperature to the current milling environment temperature without external interference. The tool cooling temperature difference is the product of the tool milling temperature, the tool heat dissipation coefficient, and the tool waiting time. Thus, the residual temperature of the current milling tool after self-cooling after the tool waiting time is obtained. Calculate the initial milling temperature at the position where the tool contacts the workpiece to be machined according to the tool cooling temperature difference. For example, the initial milling temperature is the difference between the tool milling temperature in the previous milling condition and the tool cooling temperature, and is used as the initial milling temperature of the next workpiece to be machined.

[0119] S3043: Calculate the temperature cooling ratio between the initial milling temperature and the current milling temperature.

[0120] Specifically, the temperature cooling ratio is the ratio between the initial milling temperature and the current milling temperature, and the temperature cooling ratio is used as the heating compensation coefficient of the tool milling heating rate under the dual influence of the current milling environment temperature and the tool's own temperature.

[0121] S3044: Calculate the absorbed heat load of each milling workpiece according to the temperature cooling ratio and the difference in absorbed heat.

[0122] Specifically, the product of the temperature cooling ratio and the difference in absorbed heat is used as the value of the heat absorbed by the workpiece under the dual influence of the current milling environment temperature and the tool's own temperature. According to the ratio of the volume of the workpiece to be machined to the milling contact area as the milling contact surface compensation coefficient, the absorbed heat load of each milling workpiece is equal to the product of the value of the heat absorbed by the workpiece, the corresponding area ratio, and the milling time of the workpiece.

[0123] S40: Conduct a finite element analysis of the milling heat of the current milling process according to the evaporation heat load and the absorbed heat load, and estimate the milling heat load of the workpiece to be machined corresponding to the steady state stage according to the analysis results.

[0124] Specifically, as Figure 7 shown, step S40 specifically includes the following steps:

[0125] S401: Calculate the stage heat change coefficient corresponding to each milling stage of the current milling process according to the evaporation heat load and the absorbed heat load.

[0126] Specifically, the sum of the evaporation heat load and the absorbed heat load corresponding to each milling stage is used as the total evaporation heat load during the milling process, calculate the milling heat load of the milling temperature corresponding to the current milling process, and use the ratio between the total evaporation heat load and the milling heat load as the stage heat change coefficient of the current milling stage.

[0127] S402: According to the stage heat change coefficient, perform finite element analysis on the milling heat of the current milling process to obtain a steady-state equilibrium point where the absorbed heat and the dissipated heat reach dynamic equilibrium.

[0128] Specifically, according to the stage heat change coefficient of each stage and the corresponding milling time sequence, take the milling heat with the same stage heat change coefficient as a finite element, comprehensively divide the current milling process in time sequence to obtain multiple finite element units with unified stage heat change coefficients, and perform independent analysis on the absorbed heat and the dissipated heat of each finite element. When the absorbed heat and the dissipated heat of the finite element reach dynamic equilibrium, that is, the total absorbed heat of the workpiece, the tool, and the residual wastewater approaches the same as the total dissipated heat generated during the milling process of the workpiece, then the corresponding finite element unit is used as the steady-state equilibrium point of the current milling process.

[0129] S403: Obtain the steady-state milling heat and the corresponding milling environment temperature in the steady-state stage after reaching the steady-state equilibrium point.

[0130] Specifically, after the milling time sequence reaches steady-state equilibrium, it indicates that the current milling process enters the steady-state stage. At this time, obtain the heat generated by the actual milling temperature between the current workpiece and the tool as the steady-state milling heat, and take the temperature average value between the absorbed heat of the workpiece and the tool and the temperature of the residual wastewater at this time as the corresponding milling environment temperature.

[0131] S404: Calculate the corresponding steady-state environment heat according to the milling environment temperature, and calculate the milling heat load of the workpiece to be machined in the current steady-state stage according to the steady-state milling heat and the steady-state environment heat.

[0132] Specifically, obtain the steady-state environment heat corresponding to the milling environment temperature according to the product of the milling environment temperature, the working time of the tool in the steady-state stage, and the specific heat capacity of the air at the milling environment temperature, calculate the steady-state temperature difference between the steady-state milling heat and the steady-state environment heat, and take the product of the steady-state temperature difference, the milling heat dissipation time, and the current specific heat capacity as the milling heat load in the current steady-state stage.

[0133] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0134] In one embodiment, a digital test device for milling heat load is provided, and the digital test device for milling heat load corresponds one-to-one with the digital test method for milling heat load in the above embodiment. As Figure 8As shown in the figure, the digital test device for milling heat load includes a data acquisition module, a volatilization data calculation module, an absorption data calculation module, and a data analysis module. The detailed description of each functional module is as follows:

[0135] The data acquisition module is used to obtain the current milling temperature of the workpiece to be machined and the residual wastewater temperature corresponding to the previous cooled workpiece, and calculate the steady-state temperature rise when the current machining process reaches the cooling temperature balance.

[0136] The volatilization data calculation module is used to calculate the heat of water vapor volatilization in the steady-state stage corresponding to the steady-state temperature rise, and calculate the volatilization heat load in the current steady-state stage according to the heat of water vapor volatilization.

[0137] The absorption data calculation module is used to respectively obtain the absorbed heat of the workpiece to be machined and the corresponding milling cutter, and calculate the absorption heat load of the milled workpiece according to the absorbed heat.

[0138] The data analysis module is used to perform finite element analysis on the milling heat of the current milling process according to the volatilization heat load and the absorption heat load, and estimate the milling heat load of the workpiece to be machined corresponding to the steady-state stage according to the analysis results.

[0139] Preferably, the volatilization data calculation module specifically includes:

[0140] The current milling data acquisition sub-module is used to obtain the complete machining time of the workpiece to be machined, and calculate the current milling heat corresponding to the workpiece to be machined according to the complete machining time and the current milling temperature.

[0141] The water vapor volatilization heat calculation sub-module is used to calculate the residual milling heat of the residual wastewater temperature, and calculate the water vapor volatilization heat in the steady-state stage corresponding to the steady-state temperature rise according to the current milling heat and the residual milling heat.

[0142] The environmental cumulative heat calculation sub-module is used to obtain the temperature rise time when the current machining process reaches the current steady-state stage, and calculate the environmental cumulative heat corresponding to the temperature rise time.

[0143] The volatilization heat load calculation sub-module is used to calculate the volatilization heat load in the current steady-state stage according to the water vapor volatilization heat and the environmental cumulative heat.

[0144] Preferably, the data acquisition module further includes:

[0145] The temperature rise coefficient calculation sub-module is used to calculate the initial temperature rise coefficient of the residual wastewater temperature in the rapid temperature rise stage.

[0146] The transition stage judgment sub-module is used to judge the stage transition node of the residual temperature influence of the residual wastewater temperature on the current milling temperature according to the initial temperature rise coefficient.

[0147] The transition coefficient calculation sub-module is used to calculate the steady-state transition coefficient between the current residual wastewater temperature and the current milling temperature when the actual milling progress of the current processing technology reaches the stage transition node.

[0148] The transition heat load calculation sub-module is used to calculate the transition heat load of the current processing technology in the steady-state transition stage according to the steady-state transition coefficient.

[0149] Preferably, the transition heat load calculation sub-module specifically includes:

[0150] The transition time acquisition unit is used to acquire the transition time of the steady-state transition stage when the current residual wastewater temperature reaches the stability of heat absorption and heat dissipation.

[0151] The transition heat dissipation calculation unit is used to calculate the transition heat dissipation of the current milling temperature according to the steady-state transition coefficient and the corresponding transition time.

[0152] The specific heat capacity acquisition unit is used to acquire the steady-state specific heat capacity of the current residual wastewater temperature after the transition time ends.

[0153] The transition heat load calculation unit is used to calculate the transition heat load of the current processing technology in the steady-state transition stage according to the transition heat dissipation and the corresponding steady-state specific heat capacity.

[0154] Preferably, the absorption data calculation module specifically includes:

[0155] The workpiece heat absorption calculation sub-module is used to acquire the workpiece thermal conductivity of the workpiece to be processed and calculate the workpiece heat absorption of the workpiece to be processed according to the workpiece thermal conductivity.

[0156] The tool heat absorption calculation sub-module is used to acquire the tool thermal conductivity of the milling tool and calculate the tool heat absorption of the milling tool according to the tool thermal conductivity.

[0157] The heat absorption difference calculation sub-module is used to calculate the heat absorption difference between adjacent milling conditions according to the workpiece heat absorption and the tool heat absorption.

[0158] The absorption heat load calculation sub-module is used to calculate the absorption heat load of the milled workpiece corresponding to each milling processing technology according to the heat absorption difference.

[0159] Preferably, the absorption heat load calculation sub-module specifically includes:

[0160] The time acquisition unit is used to acquire the tool waiting time between the switching of adjacent milled workpieces.

[0161] The initial milling temperature calculation unit is used to calculate the tool cooling temperature corresponding to the tool waiting time and calculate the initial milling temperature at the contact position between the tool and the workpiece to be processed according to the tool cooling temperature difference.

[0162] A temperature cooling ratio calculation unit for calculating the temperature cooling ratio between the initial milling temperature and the current milling temperature.

[0163] An absorbed heat load calculation unit for calculating the absorbed heat load of each milled workpiece according to the temperature cooling ratio and the difference in absorbed heat.

[0164] Preferably, the data analysis module specifically includes:

[0165] A stage coefficient calculation sub-module for calculating the stage heat change coefficient corresponding to each milling stage of the current milling process according to the volatile heat load and the absorbed heat load.

[0166] A steady-state balance point analysis sub-module for performing finite element analysis on the milling heat of the current milling process according to the stage heat change coefficient to obtain the steady-state balance point where the absorbed heat and the volatile heat reach dynamic balance.

[0167] A milling environment temperature acquisition sub-module for acquiring the steady-state milling heat and the corresponding milling environment temperature in the steady-state stage after reaching the steady-state balance point.

[0168] A milling heat load calculation sub-module for calculating the corresponding steady-state environmental heat according to the milling environment temperature, and calculating the milling heat load of the workpiece to be machined in the current steady-state stage according to the steady-state milling heat and the steady-state environmental heat.

[0169] For the specific limitations of the digital test device for milling heat load, reference can be made to the limitations of the digital test method for milling heat load in the above text, which will not be elaborated here. Each module in the above digital test device for milling heat load can be implemented in whole or in part by software, hardware and their combination. The above modules can be embedded in the processor of the computer device in hardware form or independent of it, or stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to the above modules.

[0170] In one embodiment, a computer device is provided. The computer device can be a server, and its internal structure diagram can be as Figure 9As shown in the figure. The computer device includes a processor, a memory, a network interface, and a database connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store the data of the thermal load change during the workpiece milling process. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, it realizes a digital testing method for milling thermal load.

[0171] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, it realizes the steps of a digital testing method for milling thermal load.

[0172] Those of ordinary skill in the art can understand that all or part of the processes in the above-described embodiment methods can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the above-described method embodiments. Among them, any reference to a memory, storage, database, or other medium used in the various embodiments provided in the present application can include non-volatile and / or volatile memories. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or an external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and Rambus dynamic RAM (RDRAM), etc.

[0173] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the above-mentioned division of each functional unit and module is used as an example. In actual applications, the above functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the above-described functions.

[0174] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A digital testing method for milling heat load, characterized in that, Including: Obtain the current milling temperature of the workpiece to be processed and the residual waste water temperature corresponding to the previous cooled workpiece, and calculate the steady-state temperature rise when the current processing technology reaches the cooling temperature balance; Calculate the heat of water vapor evaporation in the steady-state stage corresponding to the steady-state temperature rise, and calculate the evaporation heat load in the current steady-state stage according to the heat of water vapor evaporation; Respectively obtain the absorbed heat of the workpiece to be processed and the corresponding milling cutter, and calculate the absorbed heat load of the milled workpiece according to the absorbed heat; According to the evaporation heat load and the absorbed heat load, perform a finite element analysis on the milling heat of the current milling process, and estimate the milling heat load of the workpiece to be processed corresponding to the steady-state stage according to the analysis result.

2. The digital test method for milling heat load according to claim 1, characterized in that The calculating the heat of water vapor evaporation in the steady-state stage corresponding to the steady-state temperature rise, and calculating the evaporation heat load in the current steady-state stage according to the heat of water vapor evaporation specifically includes: Obtain the complete processing time of the workpiece to be processed, and calculate the current milling heat corresponding to the workpiece to be processed according to the complete processing time and the current milling temperature; Calculate the residual milling heat of the residual waste water temperature, and calculate the heat of water vapor evaporation in the steady-state stage corresponding to the steady-state temperature rise according to the current milling heat and the residual milling heat; Obtain the temperature rise time for the current processing technology to reach the current steady-state stage, and calculate the accumulated environmental heat corresponding to the temperature rise time; Calculate the evaporation heat load in the current steady-state stage according to the heat of water vapor evaporation and the accumulated environmental heat.

3. The digital test method for milling heat load according to claim 1, characterized in that The obtaining the current milling temperature of the workpiece to be processed and the residual waste water temperature corresponding to the previous cooled workpiece, and calculating the steady-state temperature rise when the current processing technology reaches the cooling temperature balance further includes: Calculate the initial temperature rise coefficient of the residual waste water temperature in the rapid temperature rise stage; According to the initial temperature rise coefficient, judge the stage transition node where the residual waste water temperature has a residual temperature impact on the current milling temperature; When the actual milling progress of the current processing technology reaches the stage transition node, calculate the steady-state transition coefficient between the current residual waste water temperature and the current milling temperature; Calculate the transition heat load in the steady-state transition stage of the current processing technology according to the steady-state transition coefficient.

4. The digital test method for milling heat load according to claim 3, characterized in that, The calculating the transition heat load in the steady-state transition stage of the current processing technology according to the steady-state transition coefficient specifically includes: When the current residual waste water temperature reaches the stability of heat absorption and heat dissipation, obtain the transition time of the steady-state transition stage; Calculate the transition evaporation heat of the current milling temperature according to the steady-state transition coefficient and the corresponding transition time; Obtain the steady-state specific heat capacity of the current residual waste water temperature after the transition time ends; Calculate the transition heat load in the steady-state transition stage of the current processing technology according to the transition evaporation heat and the corresponding steady-state specific heat capacity.

5. The digital testing method for milling heat load according to claim 1, characterized in that, The respectively obtaining the absorbed heat of the workpiece to be processed and the corresponding milling cutter, and calculating the absorbed heat load of the milled workpiece according to the absorbed heat specifically includes: Obtain the workpiece thermal conductivity of the workpiece to be processed, and calculate the workpiece absorbed heat of the workpiece to be processed according to the workpiece thermal conductivity; Obtain the tool thermal conductivity of the milling tool, and calculate the heat absorbed by the milling tool according to the tool thermal conductivity; Calculate the difference in heat absorption between adjacent milling conditions based on the heat absorbed by the workpiece and the heat absorbed by the tool; Calculate the heat absorption load of the milled workpiece corresponding to each milling process according to the difference in heat absorption; 6. The digital testing method for milling heat load according to claim 5, characterized in that, The calculating the heat absorption load of the milled workpiece corresponding to each milling process according to the difference in heat absorption specifically includes: Obtain the tool waiting time between the switching of adjacent milled workpieces; Calculate the tool cooling temperature corresponding to the tool waiting time, and calculate the initial milling temperature at the position where the tool contacts the workpiece to be machined according to the tool cooling temperature difference; Calculate the temperature cooling ratio between the initial milling temperature and the current milling temperature; Calculate the heat absorption load of each milled workpiece according to the temperature cooling ratio and the difference in heat absorption; 7. The digital testing method for milling heat load according to claim 1, characterized in that The performing a finite element analysis on the milling heat of the current milling process according to the heat dissipation load and the heat absorption load, and estimating the milling heat load of the workpiece to be machined corresponding to the steady state stage according to the analysis result specifically includes: Calculate the stage heat change coefficient corresponding to each milling stage of the current milling process according to the heat dissipation load and the heat absorption load; Perform a finite element analysis on the milling heat of the current milling process according to the stage heat change coefficient to obtain a steady state equilibrium point where the absorbed heat and the dissipated heat reach dynamic equilibrium; Obtain the steady state milling heat and the corresponding milling environment temperature in the steady state stage after reaching the steady state equilibrium point; Calculate the corresponding steady state environment heat according to the milling environment temperature, and calculate the milling heat load of the workpiece to be machined in the current steady state stage according to the steady state milling heat and the steady state environment heat; 8. A digital test device for milling heat load, characterized in that, including: A data acquisition module, configured to acquire the current milling temperature of the workpiece to be machined and the residual waste water temperature corresponding to the previous cooled workpiece, and calculate the steady state temperature of temperature rise when the current processing process reaches the cooling temperature balance; A volatilization data calculation module, configured to calculate the water vapor dissipation heat in the steady state stage corresponding to the steady state temperature of temperature rise, and calculate the heat dissipation load in the current steady state stage according to the water vapor dissipation heat; An absorption data calculation module, configured to respectively obtain the heat absorbed by the workpiece to be machined and the corresponding milling tool, and calculate the heat absorption load of the milled workpiece according to the heat absorbed; A data analysis module, configured to perform a finite element analysis on the milling heat of the current milling process according to the heat dissipation load and the heat absorption load, and estimate the milling heat load of the workpiece to be machined corresponding to the steady state stage according to the analysis result; 9. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, the steps of the digital testing method for milling heat load according to any one of claims 1 to 7 are implemented; 10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, the steps of the digital testing method for milling heat load according to any one of claims 1 to 7 are implemented;

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