A temperature control method and system for thermal balance analysis of casting mold

Abstract

The invention provides a temperature control method and system for thermal balance analysis of a casting mold, which relates to the technical field of temperature control. The method comprises: extracting a mold feature set of a casting mold, determining a casting solidification sequence, marking the mold feature set in reverse order to establish key nodes, reading control parameters of a casting alloy filling process to perform flow velocity fitting of node positions of key nodes, performing temperature loss analysis based on key nodes according to flow velocity fitting results and an initial alloy liquid temperature, performing filling impact evaluation, determining continuous node compensation temperatures of filling, and establishing a simulated temperature field after filling is completed, and performing solidification temperature control fitting of castings according to the simulated temperature field and the casting solidification sequence to generate solidification cooling auxiliary parameters for temperature control management of castings, thereby solving the technical problem of low production efficiency of casting models caused by lack of temperature control in the casting mold process, realizing accurate establishment of local temperature gradients, and improving thermal balance of casting molds.

Description

Technical Field

[0001] The invention relates to the technical field of temperature control, and in particular to a temperature control method and system for thermal balance analysis of a casting mold. Background Art

[0002] With the development of science and technology, especially the development of the field of heat balance analysis of casting molds, and with the increasing requirements for the quality of die-castings, the demand for mold temperature control has become more urgent. Therefore, it is necessary to effectively control and adjust the mold temperature, which can not only extend the life of the die-casting mold, but also ensure the good filling of the alloy liquid and the key process parameters of stable casting quality. At present, the die-casting workshops that have requirements for the quality of die-castings but do not have corresponding means to control the mold temperature basically require that the mold be preheated before production to avoid the alloy liquid from being cooled too quickly, suddenly increasing the mold temperature gradient and reducing the casting quality and prematurely damaging the mold. The temperature of the key parts of the mold should be checked and adjusted according to the process regulations, and the production rhythm and the pouring flow of the alloy liquid and the adjustment of the spraying should be controlled. However, the existing technology lacks temperature control in the process of casting the mold, resulting in the technical problem of low production efficiency of the casting model. Summary of the invention

[0003] The present application provides a temperature control method and system for thermal balance analysis of a casting mold, which is used to solve the technical problem in the prior art that there is a lack of temperature control during the casting process of the mold, resulting in low production efficiency of the casting model.

[0004] In view of the above problems, the present application provides a temperature control method and system for thermal balance analysis of a casting mold.

[0005] In a first aspect, the present application provides a temperature control method for thermal balance analysis of a casting mold, the method comprising: extracting a mold feature set of a casting mold, wherein the mold feature set is obtained by performing feature extraction on the structure data after obtaining mold structure data of the casting mold through communication, and the mold feature set comprises shape features, inner diameter features, and inflection point features; performing casting fitting on the casting mold, determining the casting solidification sequence, and marking the mold feature set with reverse feature sequence through the casting solidification sequence; establishing a key node with the mold feature set and the reverse feature sequence mark, wherein the key node is a node for temperature loss analysis with a parent-child node mark; reading Control parameters of the casting alloy filling process, fitting the node position flow velocity of the key node based on the control parameters, performing temperature loss analysis based on the key node according to the flow velocity fitting result and the initial alloy liquid temperature, and generating temperature loss analysis results; performing filling impact evaluation based on the temperature loss analysis result, and determining the continuous node compensation temperature of filling; establishing a simulated temperature field after filling is completed, and performing solidification temperature control fitting of the casting according to the simulated temperature field and the casting solidification sequence, and generating solidification cooling auxiliary parameters based on the solidification temperature fitting results; and performing temperature control management of the casting through the continuous node compensation temperature of filling and the solidification cooling auxiliary parameters.

[0006] In a second aspect, the present application provides a temperature control system for thermal balance analysis of a casting mold, the system comprising: a feature extraction module, the feature extraction module being used to extract a mold feature set of the casting mold, the mold feature set being obtained by extracting feature data from the structure data after the mold structure data of the casting mold is obtained through communication, the mold feature set comprising shape features, inner diameter features, and inflection point features; an identification module, the identification module being used to perform casting fitting on the casting mold, determine the casting solidification sequence, and perform feature reverse sequence identification on the mold feature set through the casting solidification sequence; a node establishment module, the node establishment module being used to establish a key node with the mold feature set and the feature reverse sequence identification, wherein the key node is a node for temperature loss analysis with a parent-child node identification; a temperature loss analysis module, the temperature loss analysis module The analysis module is used to read the control parameters of the casting alloy filling process, perform node position flow velocity fitting of the key node based on the control parameters, perform temperature loss analysis based on the key node according to the flow velocity fitting result and the initial alloy liquid temperature, and generate a temperature loss analysis result; the filling impact evaluation module is used to perform filling impact evaluation based on the temperature loss analysis result, and determine the continuous node compensation temperature of filling; the control fitting module is used to establish a simulated temperature field after filling, and perform solidification temperature control fitting of the casting according to the simulated temperature field and the casting solidification sequence, and generate solidification cooling auxiliary parameters based on the solidification temperature fitting result; the temperature control module is used to perform temperature control management of the casting through the continuous node compensation temperature of filling and the solidification cooling auxiliary parameters.

[0007] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0008] The present application provides a temperature control method and system for thermal balance analysis of a casting mold, which relates to the field of temperature control technology. It solves the technical problem in the prior art that there is a lack of temperature control in the process of casting the mold, resulting in low production efficiency of the casting model, and achieves accurate establishment of local temperature gradients, thereby improving the thermal balance of the casting mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A schematic flow chart of a temperature control method for thermal balance analysis of a casting mold is provided for this application.

[0010] Figure 2 The present application provides a schematic flow chart of establishing a simulated temperature field in a temperature control method for thermal balance analysis of a casting mold.

[0011] Figure 3 The present application provides a schematic flow chart of auxiliary parameters for solidification cooling in a temperature control method for thermal balance analysis of a casting mold.

[0012] Figure 4 A schematic diagram of the temperature control system structure for thermal balance analysis of a casting mold is provided for this application.

[0013] Explanation of the reference numerals: feature extraction module 1, identification module 2, node establishment module 3, temperature loss analysis module 4, filling impact evaluation module 5, control fitting module 6, temperature control module 7. DETAILED DESCRIPTION

[0014] The present application provides a temperature control method and system for thermal balance analysis of a casting mold, which is used to solve the technical problem in the prior art that there is a lack of temperature control during the casting mold process, resulting in low production efficiency of the casting model.

[0015] Embodiment 1

[0016] like Figure 1 As shown, an embodiment of the present application provides a temperature control method for heat balance analysis of a casting mold, the method comprising:

[0017] Step A100: extracting a mold feature set of a casting mold, wherein the mold feature set is obtained by extracting features from the mold structure data of the casting mold after the mold structure data is obtained through communication, and the mold feature set includes shape features, inner diameter features, and inflection point features;

[0018] In the present application, a temperature control method for thermal balance analysis of a casting mold provided in an embodiment of the present application is applied to a temperature control system for thermal balance analysis of a casting mold. In order to improve the mold quality and production efficiency in the mold casting process, it is necessary to extract the mold features of the casting mold in sequence, which means that after a temperature control system for thermal balance analysis of a casting mold communicates data with a target casting mold based on a transmission channel, the mold structure data of the casting mold is determined. The mold structure data may include upper and lower template structure data, mold core structure data, slider structure data, and cooling system structure data. On this basis, the mold structure features in the structure data are collected. The collected structural features may be shape features, inner diameter features, and inflection point features of the casting mold. The shape features are determined according to different casting processes, and may be sand molds, metal molds, ceramic molds, etc. The inner diameter feature refers to the diameter feature inside the mold cast under different casting processes, and the inflection point feature refers to the feature at the point where the concavity changes in the mold cast under different casting processes, which serves as an important reference for temperature control during the later thermal balance analysis of the casting mold.

[0019] Step A200: performing casting fitting on the casting mold, determining a casting solidification sequence, and marking the mold feature set in reverse order according to the casting solidification sequence;

[0020] In the present application, in order to ensure the casting efficiency during the casting process of the target mold, it is necessary to determine the casting sequence of the casting mold, which means that the casting mold is firstly cast fitted, and two or more simulation methods of the casting mold are combined to perform casting simulation. For example, in the casting process, the finite element method and the finite volume method can be combined to simultaneously solve the molten metal flow, temperature field distribution, stress-strain distribution and other data of the casting mold. On this basis, the solidification time sequence of the casting mold is statistically analyzed, and the casting solidification sequence is determined according to the solidification time sequence. Furthermore, the extracted mold feature set is marked in reverse order through the determined casting solidification sequence. Through the casting solidification sequence, the temperature loss of the liquid can be analyzed during the early flow, and the temperature loss can also be analyzed during the later solidification. The feature reverse order marking refers to the marking of the reverse order of the flow direction, thereby ensuring temperature control when realizing the thermal balance analysis of the casting mold.

[0021] Step A300: establishing a key node with the mold feature set and the reverse order identifier of the feature, wherein the key node is a node for temperature loss analysis with parent and child node identifiers;

[0022] In the present application, in order to more accurately control the temperature of the casting mold during the thermal balance analysis, it is necessary to establish the key nodes in the thermal balance analysis of the casting mold according to the shape features, inner diameter features, inflection point features in the mold feature set extracted above and the reverse order identification of the features obtained above. The key node refers to the node of the temperature loss analysis with the parent-child node identification, which means that the shape features, inner diameter features, and inflection point features in the mold feature set are hierarchically divided into levels by the temperature control process of the thermal balance analysis of the casting mold according to the casting solidification order in the feature reverse order identification to generate multiple nodes of different levels. At the same time, the nodes in the front level are called the parent nodes of the nodes connected in the next level. Similarly, the nodes in the next level are called the child nodes of the nodes connected in the previous level, and each node contains the temperature loss data of the casting mold at the current node moment, which lays a solid foundation for the subsequent temperature control of the casting mold during the thermal balance analysis.

[0023] Step A400: reading control parameters of the casting alloy filling process, performing flow velocity fitting of the node position of the key node based on the control parameters, performing temperature loss analysis based on the key node according to the flow velocity fitting result and the initial alloy liquid temperature, and generating a temperature loss analysis result;

[0024] Furthermore, step A400 of the present application also includes:

[0025] Step A410: reading the base temperature of the casting mold, and establishing an initial data set through the base temperature and the ambient temperature;

[0026] Step A420: Perform initial temperature loss analysis of key nodes using the formula, calculated as follows:

[0027] ;

[0028] in, is the initial temperature loss result of the nth key node, is the convective heat transfer coefficient, is the heat transfer area of ​​the nth key node, is the velocity fitting result of the nth key node, represents the node temperature of the n-1th key node, is the ground state temperature;

[0029] Step A430: Obtain the temperature fitting result of the casting mold with the initial temperature loss result, perform temperature loss compensation on the mold temperature fitting result with the ambient temperature, and generate a temperature loss analysis result according to the compensation result.

[0030] Furthermore, step A430 of the present application includes:

[0031] Step A431: obtaining a weighted average value of the initial temperature loss results under a unit time length, and using the weighted average value as the initial temperature loss of the casting mold;

[0032] Step A432: obtaining a convection temperature difference according to the loss initial temperature and the ambient temperature;

[0033] Step A433: Fit the temperature loss of the casting mold by the convection temperature difference, unit time and the outer surface area of ​​the casting mold, complete the initial temperature loss compensation according to the temperature loss fitting result, and generate the temperature loss analysis result.

[0034] In the present application, in order to better analyze the temperature loss during the casting mold process, it is first necessary to read the control parameters in the casting alloy filling process, which may include liquid rising speed parameters, filling pressure parameters, filling speed parameters, and crusting time parameters. On this basis, the flow rate is fitted with the node position of the key node, which means that the liquid rising speed parameters, filling pressure parameters, filling speed parameters, and crusting time parameters in the control parameters are matched at the key nodes for the flow rate in the casting alloy process, and the flow rate fitting results and the initial alloy liquid temperature are generated. At the same time, the temperature loss analysis is performed based on the key nodes. The process may be to first read the base temperature of the casting mold, which means to read the reference temperature of the casting mold in the casting state, and integrate the data through the base temperature and the ambient temperature of the casting mold and record it as the initial data set. Further, the initial temperature loss analysis of the key nodes is performed by the formula shown below, and the calculation formula is:

[0035] ;

[0036] in, is the initial temperature loss result of the nth key node, is the convective heat transfer coefficient, is the heat transfer area of ​​the nth key node, is the velocity fitting result of the nth key node, represents the node temperature of the n-1th key node, is the ground state temperature;

[0037] Furthermore, the temperature loss data is fitted by the initial temperature loss results corresponding to the key nodes to obtain the temperature fitting results of the casting mold, and the temperature loss compensation is performed on the mold temperature fitting results with the ambient temperature, which means that when the temperature in the mold temperature fitting results is lower than the ambient temperature, it is necessary to perform temperature compensation on the mold casting process according to the temperature difference, that is, firstly obtain the weighted average value of the initial temperature loss results per unit time, multiply the initial temperature loss results per unit time by the corresponding weight value, and then sum them up to obtain the overall value, and then divide it by the total number of units of the initial temperature loss results per unit time, and use the weighted average value to calculate the total value. The mean is taken as the initial loss temperature of the casting mold. Furthermore, the temperature data is subtracted according to the initial loss temperature and the ambient temperature, and the subtraction result is recorded as the convection temperature difference. At the same time, the temperature loss of the casting mold is fitted by the convection temperature difference, unit time and the outer surface area of ​​the casting mold. It means that the alloy liquid of the casting mold and the casting mold are taken as overall data, and the temperature loss of the casting mold is analyzed by the above formula at the ambient temperature. The compensation calculation of the alloy liquid temperature loss is performed according to the temperature loss analysis result, so as to complete the initial temperature loss compensation and generate the temperature loss analysis result, which has a limited effect on the temperature control during the thermal balance analysis of the casting mold.

[0038] Step A500: performing a filling impact assessment based on the temperature loss analysis result, and determining a continuous node compensation temperature of the filling;

[0039] In the present application, in order to improve the accuracy of temperature loss compensation for casting molds, it is necessary to use the temperature loss analysis results generated by temperature loss analysis as reference basic data to evaluate the filling impact of the casting model, which means recording the degree of influence of the casting properties, pouring conditions, and casting structure of the casting mold on the filling of the casting mold, and evaluating the positive and negative influences of the casting mold filling process according to the casting heat storage coefficient, casting temperature, and casting gas in the casting properties, the pouring temperature, filling pressure head, and pouring system structure in the pouring conditions, and the mold thickness and casting complexity in the casting structure. Determine the compensation temperature of the continuous nodes of the mold filling based on the evaluated positive and negative influence evaluations, which means monitoring the temperature data of the continuous nodes, and performing temperature compensation in the continuous nodes based on the positive or negative influence evaluation, so as to serve as reference data for temperature control during the later thermal balance analysis of the casting mold.

[0040] Step A600: establishing a simulated temperature field after mold filling is completed, and performing solidification temperature control fitting of the casting according to the simulated temperature field and the casting solidification sequence, and generating solidification cooling auxiliary parameters based on the solidification temperature fitting result;

[0041] Furthermore, if Figure 2As shown, step A600 of the present application also includes:

[0042] Step A610: fitting the filling time nodes of each cavity by using the flow rate fitting result and the mold feature set;

[0043] Step A620: Calculate the casting temperature at key node positions before solidification by filling the time nodes and continuous node compensation temperatures;

[0044] Step A630: Complete the establishment of the simulated temperature field based on the casting temperature calculation results at the key node positions.

[0045] Furthermore, if Figure 3 As shown, step A600 of the present application also includes:

[0046] Step A640: establishing a local temperature gradient constraint through the simulated temperature field;

[0047] Step A650: using the casting solidification sequence as the first constraint and the local temperature gradient constraint as the second constraint, performing solidification temperature fitting of the fastest solidification speed;

[0048] Step A660: Determine the solidification cooling auxiliary parameters according to the solidification temperature fitting result.

[0049] Furthermore, step A660 of the present application includes:

[0050] Step A661: establishing a multi-dimensional evaluation fitness function for solidification cooling control, wherein the multi-dimensional evaluation fitness function includes a complexity evaluation fitness function, a stability evaluation fitness function, and a feasibility evaluation fitness function;

[0051] Step A662: performing cooling auxiliary parameter control evaluation corresponding to the solidification temperature fitting result through the multi-dimensional evaluation fitness function;

[0052] Step A663: Filter and obtain solidification cooling auxiliary parameters according to the control evaluation results.

[0053] In the present application, in order to ensure thermal balance during the casting process, it is necessary to establish a simulated temperature field for the mold after filling. The establishment process can be to first fit the filling time nodes of each cavity through the alloy liquid flow rate in the flow rate fitting result and the mold features contained in the mold feature set. It means that in the process of casting the mold, when all the cavities in the mold start to flow in from the alloy liquid, according to the flow rate of the alloy liquid in unit time, the time node when each cavity is filled is fitted, and then the casting temperature of the key node position of the casting mold before solidification is calculated through the filling time node and the continuous node compensation temperature. It means that the temperature at the key node position at the filling time node and the compensation temperature at the continuous node are used as temperature reference data to calculate the temperature of the casting at the key node position before solidification. Furthermore, on the basis of the calculation results of the casting temperature at the key node position, the calculation results of the casting temperature at the key node position are serialized in the order of time nodes, so as to obtain the establishment of the simulated temperature field after the casting mold is filled.

[0054] Furthermore, the constructed simulated temperature field and casting solidification sequence are used as basic reference data to control the solidification temperature of the casting, which means firstly establishing a local temperature gradient constraint of the casting through the simulated temperature field, and the local temperature gradient constraint is obtained by dividing the temperature change range in the historical casting mold process, and taking the casting solidification sequence as the first constraint for the solidification temperature control fitting of the casting, and taking the local temperature gradient constraint as the second constraint for the solidification temperature control fitting of the casting, and performing the solidification temperature fitting of the fastest solidification speed on the casting, which means extracting the fastest solidification data corresponding to the first sequence according to the casting solidification sequence under the first constraint, and then extracting the fastest solidification data corresponding to the first sequence according to the local solidification sequence under the second constraint. The temperature data in the temperature gradient is used to extract the fastest solidification temperature data. The solidification temperature of the fastest solidification speed is fitted based on the fastest solidification data and the fastest solidification temperature data. The solidification cooling auxiliary parameters are further determined according to the solidification temperature fitting results. It means that the multidimensional evaluation fitness function of the solidification cooling control needs to be established first. The multidimensional evaluation fitness function is a function used to evaluate the fitness in the solidification cooling control process from multiple angles. The higher the evaluation value, the higher the fitness. At the same time, the multidimensional evaluation fitness function includes the complexity evaluation fitness function, the stability evaluation fitness function, and the feasibility evaluation fitness function. The complex evaluation fitness function is used to evaluate The fitness function for evaluating the stability of the water pipes is used to evaluate the number of times the water temperature and flow rate in the water pipes are changed. The fitness function for evaluating the feasibility of the fixed number of water pipes, water temperature and water flow rate in the casting mold process is used. For example, the water pipe in the casting mold is a very small pipe, and the contact surface with the casting mold is very small. If the casting mold is to be cooled quickly, its feasibility is relatively poor. Therefore, the corresponding fitness for feasibility evaluation is low. Furthermore, the cooling auxiliary parameter control evaluation corresponding to the solidification temperature fitting result is performed through the multi-dimensional evaluation fitness function, which refers to the following. The fitness function of complexity evaluation is used to evaluate the fitness of the size and number of water pipes of the cooling auxiliary parameters corresponding to the solidification temperature fitting result; the fitness function of stability evaluation is used to evaluate the fitness of the water temperature and flow rate of the cooling auxiliary parameters corresponding to the solidification temperature fitting result; the fitness function of feasibility evaluation is used to evaluate the feasibility of the cooling auxiliary parameters corresponding to the solidification temperature fitting result. Finally, the evaluations of the three are summarized and recorded as the temperature control evaluation results of the thermal balance analysis of the casting mold. Finally, the solidification cooling auxiliary parameters are determined after screening the control evaluation results according to the solidification cooling effect, so as to improve the accuracy of temperature control in the later thermal balance analysis of the casting mold.

[0055] Step A700: Temperature control management of the casting is performed through continuous node compensation temperature of filling and the solidification cooling auxiliary parameters.

[0056] Furthermore, step A700 of the present application also includes:

[0057] Step A710: Establishing a result-oriented compensation network, and performing an abnormal retrospective analysis on casting production results through the compensation network;

[0058] Step A720: extracting compensation data according to the abnormal retrospective analysis result;

[0059] Step A730: Execute temperature control optimization processing using the compensation data.

[0060] In this application, in order to achieve more accurate temperature control management of castings, it is first necessary to control and manage the temperature increase or decrease of the casting mold during the thermal balance analysis by compensating the temperature of the continuous nodes in the filling process for the influence of the temperature increase in the casting mold process, as well as the influence of the solidification cooling auxiliary parameters obtained by the above screening on the temperature reduction in the casting mold process. Furthermore, a result-oriented compensation network is established. The result-oriented compensation network is used for optimizing the temperature compensation in the casting mold process when an abnormality occurs during the temperature control management of the casting. It means that the abnormality of the casting production results is first analyzed retrospectively through the compensation network. The anomalies in the casting production results may include deformation, cracks, pores, etc. of the castings. On this basis, an abnormal retrospective analysis of the castings is performed to obtain the casting abnormality sources corresponding to the deformation, cracks, pores, etc. of the castings. For example, the casting abnormality source may be that the temperature increase may cause liquid metal to stick to the mold, the casting cools slowly, the grains are coarse, etc., so as to determine the abnormal retrospective analysis results. Furthermore, according to the abnormal retrospective analysis results, abnormal data is extracted, and compensation data for improving the castings is generated according to the abnormal data. Finally, the compensation data is used to perform temperature control optimization processing on the casting mold, so as to ensure better temperature control during the later thermal balance analysis of the casting mold.

[0061] In summary, the temperature control method for thermal balance analysis of a casting mold provided in an embodiment of the present application includes at least the following technical effects, which achieves accurate establishment of local temperature gradients and improves the thermal balance of the casting mold.

[0062] Embodiment 2

[0063] Based on the same inventive concept as the temperature control method for heat balance analysis of a casting mold in the aforementioned embodiment, Figure 4 As shown, the present application provides a temperature control system for thermal balance analysis of a casting mold, the system comprising:

[0064] A feature extraction module 1, wherein the feature extraction module 1 is used to extract a mold feature set of a casting mold, wherein the mold feature set is obtained by extracting features from the structure data of the casting mold after the mold structure data of the casting mold is obtained through communication, and the mold feature set includes shape features, inner diameter features, and inflection point features;

[0065] An identification module 2, the identification module 2 is used to perform casting fitting on the casting mold, determine the casting solidification sequence, and perform feature reverse sequence identification on the mold feature set according to the casting solidification sequence;

[0066] A node establishment module 3, wherein the node establishment module 3 is used to establish a key node with the mold feature set and the reverse order of the feature, wherein the key node is a node for temperature loss analysis with a parent-child node identifier;

[0067] A temperature loss analysis module 4, which is used to read the control parameters of the casting alloy filling process, perform flow velocity fitting of the node position of the key node based on the control parameters, perform temperature loss analysis based on the key node according to the flow velocity fitting result and the initial alloy liquid temperature, and generate a temperature loss analysis result;

[0068] A filling impact assessment module 5, the filling impact assessment module 5 is used to perform a filling impact assessment based on the temperature loss analysis result, and determine a continuous node compensation temperature of the filling;

[0069] A control fitting module 6, wherein the control fitting module 6 is used to establish a simulated temperature field after mold filling is completed, and to perform solidification temperature control fitting of the casting according to the simulated temperature field and the casting solidification sequence, and to generate solidification cooling auxiliary parameters based on the solidification temperature fitting result;

[0070] The temperature control module 7 is used to control the temperature of the casting by compensating the temperature of the continuous nodes of the filling and the auxiliary parameters of the solidification and cooling.

[0071] Furthermore, the system also includes:

[0072] A data set establishment module, the data set establishment module is used to read the base state temperature of the casting mold and establish an initial data set through the base state temperature and the ambient temperature;

[0073] The loss analysis module is used to perform initial temperature loss analysis of key nodes through a formula, and the calculation is as follows:

[0074] ;

[0075] in, is the initial temperature loss result of the nth key node, is the convective heat transfer coefficient, is the heat transfer area of ​​the nth key node, is the velocity fitting result of the nth key node, represents the node temperature of the n-1th key node, is the ground state temperature;

[0076] The first loss compensation module is used to obtain the temperature fitting result of the casting mold with the initial temperature loss result, and to perform temperature loss compensation on the mold temperature fitting result with the ambient temperature, and to generate a temperature loss analysis result according to the compensation result.

[0077] Furthermore, the system also includes:

[0078] A weighted average module, which is used to obtain a weighted average value of the initial temperature loss results per unit time, and use the weighted average value as the initial temperature loss of the casting mold;

[0079] A flow temperature difference module, the flow temperature difference module is used to obtain a convection temperature difference according to the loss initial temperature and the ambient temperature;

[0080] The second loss compensation module is used to fit the temperature loss of the casting mold through the convection temperature difference, unit time and the outer end surface area of ​​the casting mold, complete the initial temperature loss compensation according to the temperature loss fitting result, and generate the temperature loss analysis result.

[0081] Furthermore, the system also includes:

[0082] A node fitting module, the node fitting module is used to perform filling time node fitting of each cavity according to the flow rate fitting result and the mold feature set;

[0083] A first calculation module, the first calculation module is used to calculate the casting temperature at the key node position before solidification by filling the time node and the continuous node compensation temperature;

[0084] The second calculation module is used to complete the establishment of the simulated temperature field based on the calculation results of the casting temperature at the key node position.

[0085] Furthermore, the system also includes:

[0086] A first constraint module, the first constraint module is used to establish a local temperature gradient constraint through the simulated temperature field;

[0087] A second constraint module, the second constraint module is used to perform solidification temperature fitting of the fastest solidification speed with the casting solidification sequence as the first constraint and the local temperature gradient constraint as the second constraint;

[0088] The first parameter determination module is used to determine the solidification cooling auxiliary parameters according to the solidification temperature fitting result.

[0089] Furthermore, the system also includes:

[0090] A function determination module, wherein the function determination module is used to establish a multi-dimensional evaluation fitness function for solidification cooling control, wherein the multi-dimensional evaluation fitness function includes a complexity evaluation fitness function, a stability evaluation fitness function, and a feasibility evaluation fitness function;

[0091] A control evaluation module, the control evaluation module is used to perform a cooling auxiliary parameter control evaluation corresponding to a solidification temperature fitting result through the multi-dimensional evaluation fitness function;

[0092] The second parameter determination module is used to select and obtain the solidification cooling auxiliary parameters according to the control evaluation results.

[0093] Furthermore, the system also includes:

[0094] A retrospective analysis module, which is used to establish a result-oriented compensation network and to perform an abnormal retrospective analysis on the casting production results through the compensation network;

[0095] A data extraction module, the data extraction module is used to extract compensation data according to the abnormal retrospective analysis results;

[0096] An optimization processing module is used to perform temperature control optimization processing through the compensation data.

[0097] Through the above-mentioned detailed description of the temperature control method for thermal balance analysis of a casting mold in this specification, those skilled in the art can clearly know the temperature control system for thermal balance analysis of a casting mold in this embodiment. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0098] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A temperature control method for heat balance analysis of a casting mold, characterized in that: The method comprises: Extracting a mold feature set of a casting mold, wherein the mold feature set is obtained by extracting features from the mold structure data of the casting mold after communication is obtained, and the mold feature set includes shape features, inner diameter features, and inflection point features; Performing casting fitting on the casting mold, determining a casting solidification sequence, and marking the mold feature set in reverse order according to the casting solidification sequence; Establishing a key node with the mold feature set and the reverse order identification of the features, wherein the key node is a node for temperature loss analysis with parent and child node identifications; Reading control parameters of the casting alloy filling process, performing flow velocity fitting of the node position of the key node based on the control parameters, performing temperature loss analysis based on the key node according to the flow velocity fitting result and the initial alloy liquid temperature, and generating a temperature loss analysis result, wherein the control parameters include a liquid rising speed parameter, a filling pressure parameter, a filling speed parameter, and a crusting time parameter; Performing a filling impact assessment based on the temperature loss analysis result to determine the compensation temperature of the continuous nodes of the filling, wherein the filling impact assessment refers to monitoring the temperature data of the continuous nodes and performing temperature compensation in the continuous nodes based on the positive impact assessment or the negative impact assessment; Establishing a simulated temperature field after the filling is completed, and performing solidification temperature control fitting of the casting according to the simulated temperature field and the casting solidification sequence, and generating solidification cooling auxiliary parameters based on the solidification temperature fitting result; The temperature control management of the casting is performed by using the continuous node compensation temperature of the filling and the solidification cooling auxiliary parameters; Reading the base temperature of the casting mold, and establishing an initial data set through the base temperature and the ambient temperature; The initial temperature loss analysis of key nodes is performed using the formula, and the calculation is as follows: ； in, is the initial temperature loss result of the nth key node, is the convective heat transfer coefficient, is the heat transfer area of ​​the nth key node, is the velocity fitting result of the nth key node, represents the node temperature of the n-1th key node, is the ground state temperature; Obtaining a temperature fitting result of the casting mold using the initial temperature loss result, performing temperature loss compensation on the temperature fitting result of the mold using the ambient temperature, and generating a temperature loss analysis result based on the compensation result; The specific steps of fitting the solidification temperature control of the casting in the casting solidification sequence are: establishing a local temperature gradient constraint through the simulated temperature field; Taking the casting solidification sequence as the first constraint and the local temperature gradient constraint as the second constraint, performing solidification temperature fitting of the fastest solidification speed; The solidification cooling auxiliary parameters are determined according to the solidification temperature fitting results.

2. The method according to claim 1, characterized in that The method further comprises: Obtaining a weighted average value of the initial temperature loss results per unit time, and using the weighted average value as the initial temperature loss of the casting mold; Obtaining a convection temperature difference according to the loss initial temperature and the ambient temperature; The temperature loss of the casting mold is fitted by the convection temperature difference, unit time and the outer surface area of ​​the casting mold, and the initial temperature loss compensation is completed according to the temperature loss fitting result to generate the temperature loss analysis result.

3. The method according to claim 1, characterized in that The method further comprises: Fitting the filling time nodes of each cavity by using the flow rate fitting result and the mold feature set; The casting temperature is calculated at the key node positions before solidification by filling the time nodes and compensating the temperature at the continuous nodes; The simulated temperature field is established based on the calculation results of casting temperature at key node positions.

4. The method according to claim 1, characterized in that The method further comprises: Establishing a multidimensional evaluation fitness function for solidification cooling control, wherein the multidimensional evaluation fitness function includes a complexity evaluation fitness function, a stability evaluation fitness function, and a feasibility evaluation fitness function; Executing cooling auxiliary parameter control evaluation corresponding to the solidification temperature fitting result through the multi-dimensional evaluation fitness function; The solidification cooling auxiliary parameters are screened and obtained according to the control evaluation results.

5. The method according to claim 1, characterized in that The method further comprises: Establish a result-oriented compensation network, and use the compensation network to conduct anomaly retrospective analysis of casting production results; Extract compensation data based on abnormal retrospective analysis results; A temperature control optimization process is performed using the compensation data.

6. A temperature control system for thermal balance analysis of a casting mold, characterized in that: The system is used to implement a temperature control method for heat balance analysis of a casting mold according to any one of claims 1 to 5, and the system comprises: A feature extraction module, wherein the feature extraction module is used to extract a mold feature set of a casting mold, wherein the mold feature set is obtained by extracting features from the structure data of the casting mold after the mold structure data is obtained through communication, and the mold feature set includes shape features, inner diameter features, and inflection point features; An identification module, the identification module is used to perform casting fitting on the casting mold, determine the casting solidification sequence, and perform feature reverse sequence identification on the mold feature set according to the casting solidification sequence; A node establishment module, the node establishment module is used to establish a key node with the mold feature set and the reverse order of the feature identification, wherein the key node is a node for temperature loss analysis with parent and child node identifications; A temperature loss analysis module, which is used to read the control parameters of the casting alloy filling process, perform flow velocity fitting of the node position of the key node based on the control parameters, perform temperature loss analysis based on the key node according to the flow velocity fitting result and the initial alloy liquid temperature, and generate a temperature loss analysis result, wherein the control parameters include a liquid rising speed parameter, a filling pressure parameter, a filling speed parameter, and a crusting time parameter; A filling impact evaluation module, the filling impact evaluation module is used to perform a filling impact evaluation based on the temperature loss analysis result, and determine the compensation temperature of the continuous nodes of the filling. The filling impact evaluation refers to monitoring the temperature data of the continuous nodes and performing temperature compensation in the continuous nodes based on the positive impact evaluation or the negative impact evaluation; A control fitting module, wherein the control fitting module is used to establish a simulated temperature field after mold filling is completed, and to perform solidification temperature control fitting of the casting according to the simulated temperature field and the casting solidification sequence, and to generate solidification cooling auxiliary parameters based on the solidification temperature fitting result; A temperature control module is used to control the temperature of the casting by compensating the temperature of the continuous nodes of the filling and the auxiliary parameters of the solidification and cooling.

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