50 results about "Transient temperature" patented technology

This invention relates to a method, device, electronic device, and computer storage medium for compensating for thermal errors in lead screws, belonging to the field of machine tool processing technology. The thermal error compensation method for lead screws is applicable to lead screw feed systems with fixed ends. It includes: acquiring real-time temperatures at key temperature points in the lead screw feed system and the positioning error at those real-time temperatures based on a preset experimental platform; constructing a three-dimensional model of the lead screw feed system based on the thermal deformation effects and complexity of each structure; performing transient temperature-structure coupled field analysis on the lead screw feed system based on the three-dimensional model to determine the correlation between the lead screw pre-tension and the thermal deformation under thermal steady-state conditions; constructing a quantitative mapping model between lead screw temperature and thermal deformation based on this correlation; and performing thermal error compensation on the lead screw based on the quantitative mapping model. This invention can accurately achieve thermal error compensation for lead screws.

A power supply apparatus (100) comprises an inverter (110), voltage and current measuring devices (120a, 120b), a temperature sensor (130), and an operation circuit (140). The inverter (110) comprises change-over switches (SW1-SW6). The voltage and current measuring devices (120a, 120b) are configured to measure the voltage (V1) and the current (I1) on the change-over switches (SW1-SW6). The temperature sensor (130) is configured to measure an initial temperature (T[0]) in an initial state. The operation circuit (140) is coupled to the voltage and current measuring devices (120a, 120b) and the temperature sensor (130). The operation circuit (140) is configured to: execute a power model (142), and calculate a first transient power of the change-over switches (SW1-SW6) on the basis of the initial temperature (T[0]), the voltage (V1), and the current (I1); and execute a thermal model (144), and calculate a first transient ideal temperature of the change-over switches (SW1-SW6) on basis of the first transient power. The power supply apparatus (100) calculates, in real time, the transient temperature of channel interfaces of the change-over switches (SW1-SW6) by measuring the voltage (V1) and the current (I1) on the change-over switches (SW1-SW6) of the inverter (110). The present invention also relates to a temperature measurement method (500) for a power supply apparatus, and an electrical system (ES1).

This application provides a method for analyzing heat distribution during the forming process of a titanium cup, comprising: determining the upper and lower boundary positions of the bending and re-bending action zone along the height direction of the cup wall based on transient temperature field data in the initial heat distribution dataset, using the corner radius of the mold as a geometric constraint, thereby obtaining the boundary range of the bending and re-bending action zone; performing edge detection on the transient temperature field data within the boundary range of the bending and re-bending action zone to identify areas where the local thermal intensity is abnormal due to the increase in material volume, and marking them as candidate areas to obtain a thermal intensity anomaly distribution map; extracting temperature peaks from the thermal intensity anomaly distribution map, and using a clustering algorithm to group the temperature peaks according to their spatial location and thermal intensity amplitude, thereby obtaining a set of grouped temperature peaks; and adjusting the blank holder force and feed speed at the location of the locally softened narrow band during the flanging forming process to eliminate the flanging springback concentration effect caused by the locally softened narrow band.

The application belongs to the technical field of new energy vehicles, and particularly relates to a transient temperature control method and device of an oil cooling electric drive system and a storage medium, which are applied to a temperature control device. The method comprises the following steps: obtaining target output power P1 and current output power P2 of the oil cooling electric drive system; according to a driving condition, when the output power of the oil cooling motor changes, the ratio of the target output power P1 to the current output power P2 is obtained; the cooling liquid circuit and the cooling oil circuit are controlled in parallel, and a control signal enters an oil cooling motor controller and a thermal management controller at the same time; and according to the ratio, the gear of the cooling liquid circuit and the cooling oil circuit is changed. The purpose is to improve the heat dissipation capacity of the whole system through linkage between the cooling oil circuit and the cooling liquid circuit, thereby improving the output capacity of the motor; and the hysteresis of the temperature control method is reduced, and the reliability of the system is improved by using the parallel control method.

The application discloses a kind of atomizer atomization numerical simulation methods based on temperature change characteristics, belong to atomizer performance prediction technical field.The method constructs simulation dataset, and sequentially executes temperature field solution, property update, droplet formation solution, transport solution, blockage risk integral calculation and constraint correction;Through multilevel transient coupling algorithm, layered transient temperature solution is carried out to liquid bin, mesh and micropore area, temperature concentration joint reconstruction algorithm is used to apply temperature change and local concentration effect to property parameter update, and through time series integral risk prediction algorithm, blockage risk is continuously accumulated and predicted;With micropore temperature difference index and local concentration factor as cross-step coupling variable, realize from temperature field to the whole-link moment-to-moment transfer of blockage risk, it is favorable to improve the continuity of particle size spectrum prediction and the stability of blockage risk window estimation under temperature change condition.

This invention discloses a method and system for predicting turbine disk temperature fields, an electronic device, and a storage medium. The method utilizes an improved Mamba-2 model with bidirectional coupling of an improved Mamba module and a spatiotemporal attention mechanism to predict turbine disk temperature fields. The spatiotemporal attention mechanism can dynamically adjust feature weights according to the temporal evolution of the temperature field, avoiding being limited to static feature weighting. The improved Mamba module performs feature filtering based on the weighted output of the spatiotemporal attention mechanism, which can selectively filter redundant temporal information and compensate for the deficiency of the Mamba-2 model in capturing features sensitive to core parameters. This forms a closed-loop collaborative mechanism of temporal modeling, feature enhancement, and gating optimization, achieving deep integration of the two. This improves both the temporal modeling accuracy of turbine disk temperature fields and the ability to capture core features, thereby improving the prediction accuracy of transient temperature fields of turbine disks.

The present application relates to a kind of extra round billet secondary cooling water three-dimensional dynamic cold line control method and system, belong to steel metallurgy continuous casting process control field, to solve the problem that before straightening, extra round billet is easily into third brittle temperature interval, cause straightening crack, internal quality is not good etc..The present application adds independent spraying cooling section in the arc air cooling section before casting blank enters straightening machine, using three-dimensional transient temperature field solution model as the core of three-dimensional dynamic secondary cooling control model, integrates feedforward, feedback, adaptive composite control architecture, realizes whole process water amount decoupling and dynamic distribution, the surface temperature of casting blank before straightening is stably controlled at 600 ℃~700 ℃, completely avoids third brittle temperature interval.The present application can greatly reduce straightening crack rate, improve casting blank internal quality and equipment life, and the transformation cost is low, adaptability is strong, with significant industrial application value.

The application provides a steam curing concrete temperature field prediction method based on coupling of CEMHYD3D and Abaqus, first, based on component mix proportion and steam curing temperature boundary, a cement-based micro-hydration model is established in CEMHYD3D to obtain cumulative heat release curve, heat release rate and induction period characteristic parameters; then a segmented hydration heat release model considering the influence of the induction period is constructed, the end time of the induction period and the heat release characteristics are determined, and the internal heat source term changing with time is formed. Then the model is written as Abaqus user subroutine HETVAL, a finite element model of transient temperature field of concrete components under steam curing is established, and transient solution is carried out after setting the initial and boundary conditions. The method solves the characterization defects of the traditional empirical model, and effectively improves the prediction accuracy and reliability of the temperature rise, peak temperature and temperature history in the steam curing stage.

This application discloses a method and related equipment for detecting equipment operation compliance. By retrieving the equipment reservation work order and corresponding standard operating procedure (SOP) file, a work order operation compliance benchmark is constructed, including standard operating positions, standard operating sequences, and standard operating attributes. By acquiring time-series infrared thermal images of the equipment operating area, transient temperature imprints generated by the operator's contact with the equipment are detected and located, achieving precise determination of the operating position and time. By extracting physical characteristics of the transient temperature imprints over time, such as temperature peak value, heating rate, cooling rate, temperature distribution pattern, and duration, quantitative operating attributes such as operating duration, pressure intensity, type of operating medium, and direction of operating action are derived based on the mapping relationship between these characteristics and operating behavior. By comparing the actual operating information with the work order operation compliance benchmark item by item, the method identifies and alerts users to equipment operation violations, achieving accurate, comprehensive, and efficient equipment operation compliance detection.

The present application belongs to the field of automobile electronics, and provides a kind of automobile wire harness fuse wire current carrying capacity matching test method and system, comprising: establishing standardization pulse loading profile, constant current test is extended to cover the composite dynamic test sequence of peak thermal shock and average thermal accumulation;Collect fuse thermal accumulation integral value and wire insulation layer multi-point temperature, introduce three-dimensional evaluation index, identify thermal response asynchronous condition;Pulse peak and duty cycle are gradually increased, respectively, approach the limit of wire transient temperature rise and fuse thermal accumulation melting boundary, determine the safe matching interval by cross comparison;According to the safe matching interval, divide the matching level, select the optimization for asynchronous risk and overheating priority failure combination respectively, and feed back the optimization result to the selection specification.The test distortion problem caused by the asynchronous thermal response of fuse and wire under dynamic pulse current is solved, and the matching reliability and test accuracy of automobile electrical system are improved.

This invention discloses a method for synergistic optimization of the lifespan and cut surface quality of ultra-high strength steel trimming dies, relating to the field of metal plastic processing technology. It solves the problem in existing technologies that neglect the coupling effect between the transient temperature rise in the adiabatic shear micro-zone and the accumulation of micro-chipping on the cutting edge, leading to uncontrollable sudden failures. This invention can monitor the transient temperature rise gradient and micro-chipping density in the adiabatic shear zone using high-speed infrared and acoustic emission technologies. It constructs an effective damage variable using the accumulated micro-chipping density as a state variable and establishes an objective function with both die lifespan and cut surface quality as dual objectives. Through an intelligent optimization algorithm, it obtains a trimming gap compensation strategy that dynamically decreases with damage accumulation, achieving proactive compensation of cutting edge passivation by process parameters. This significantly improves the controllability of ultra-high strength steel trimming die failure and ensures the stability of the cut surface quality.

A simulation test system and method for normal operation and accident conditions of a nuclear power plant pipe flange is disclosed. The system includes a water supply system, a preheating system, a test section system, a temperature control system, and a condensation system. The water supply system includes a makeup water tank, a filter, a makeup water pump, a main water tank, a high-pressure plunger pump, a high-pressure regulating valve, a cooler, and a mass flow meter. The preheating system includes a preheater. The test section system includes a pipe flange test section. The temperature control system includes a main flow branch, a rapid temperature switching branch, and a cooling water injection branch. The condensation system consists of a condenser, a cooling tower, a condensate tank, a cooling pump, a filter, a safety valve, and a relief valve. The test system of this invention can simulate the transient temperature and pressure shocks experienced inside the pipe flange structure under normal operation and accident conditions of a nuclear power plant.

The application discloses a kind of metal surface nanocrystalline preparation method and application based on controllable fretting friction, belong to material preparation technical field.The method is first to the surface of metal sample pretreatment, subsequently it is placed in fretting friction testing machine, by controlling normal load, displacement amplitude, frequency, time and environmental temperature etc.Parameter, make the pair of mating and sample surface occur fretting friction.The core is, utilize the local transient temperature rise generated in the process of fretting friction, make metal surface layer occur dynamic recrystallization while severe plastic deformation, to form nanocrystalline layer in one step, without secondary heat treatment.The application solves the problems such as long process, high energy consumption and difficult to control surface quality of traditional surface nanocrystallization technology, can prepare the uniform nanocrystalline layer with surface grain size in 200-1200nm and layer thickness in 2-30μm range, significantly improve the corrosion resistance of metal material, and process is simple, controllability is strong, and widely applicable material.

This invention discloses a coupled verification and optimization method for a cold-start focusing strategy of a high-temperature molten salt receiver. The method includes: measuring the incident heat flux density distribution of a solar simulator under different light source configurations; generating a candidate operating condition set including xenon lamp combinations and timing parameters; performing a cold-start experiment and collecting temperature data in real time, and determining over-temperature protection and thermal balance; constructing a three-dimensional unsteady-state thermo-mechanical coupled numerical model, and verifying the model using benchmark experimental data to achieve coupled verification of experimental data and numerical model; inputting measured heat flux and temperature data into the model to solve the transient temperature field and thermal stress field throughout the cold-start process; extracting the maximum temperature rise rate, circumferential temperature difference peak value, and maximum equivalent thermal stress peak value as evaluation indicators; and comparing and optimizing the target focusing strategy by comparing preset constraints. This invention achieves quantitative evaluation and optimization of the cold-start strategy, improving the safety and heating efficiency of cold starts.

This invention discloses a transient calculation method and system for the temperature field of a phase change capsule based on a thermal network, relating to the field of phase change capsule technology. The method includes: constructing a physical model of the phase change capsule and initializing its parameters; constructing a four-node thermal network model; the phase change process: preheating stage: all heat on the solid surface is used for temperature rise, solving the four-node coupled heat transfer equations, and outputting the transient temperature values ​​of each node; melting stage: the solid surface temperature is fixed at the phase change temperature, solving the equations, calculating the enthalpy of the two-phase mixture based on the net heat flow of the gas and liquid phases, updating the solid and liquid mass and volume, and outputting the transient temperature values ​​of each node; complete liquefaction stage: the solid disappears, the liquid nodes directly exchange heat with the shell wall, calculating the heat transfer coefficient, solving the equations, and outputting the transient temperature values ​​of each node; stage transition smoothing is applied between the preheating and melting stages and between the melting and complete liquefaction stages of each node. This invention significantly improves computational efficiency, provides a complete physical model, and exhibits good numerical stability.

This invention discloses a structural thermo-mechanical coupling method and apparatus considering isogeometric analysis, belonging to the field of thermodynamics. The method includes: S1. Establishing an isogeometric NURBS model: providing the basis for expressing geometric and physical fields for thermo-mechanical coupling analysis, achieving seamless integration of CAD and CAE; S2. Calculating the transient temperature field based on the central difference method: obtaining the temperature distribution of the structure at different times, providing temperature input for subsequent thermo-mechanical coupling; S3. Transforming the temperature field into equivalent temperature loads: converting the thermal effects caused by temperature changes into equivalent loads identifiable by structural mechanics analysis; S4. Solving the stiffness equation of the structure under the combined action of external forces and temperature: obtaining the displacement matrix of the structural control points; S5. Solving the structural coupling field based on the displacement matrix: obtaining all key physical quantities in the thermo-mechanical coupling field, completing the coupling analysis. This invention can verify the feasibility of applying isogeometric analysis in coupled fields.

This invention provides a method and system for predicting the damage evolution of concrete lining in tunnel fires, relating to the field of computer technology. The method includes: acquiring geometric feature data of the tunnel, fire image data, and high-temperature performance data of the lining concrete; constructing a thermal flow field based on the geometric feature data and fire image data to obtain a three-dimensional transient temperature field; calculating the internal forces of each section based on the three-dimensional transient temperature field and the high-temperature performance data of the material to obtain the real-time internal force state of each section of the lining; determining damage initiation based on the real-time internal force state of each section of the lining to obtain the spatiotemporal distribution of the initial damage zone; performing damage-internal force coupled evolution based on the spatiotemporal distribution of the initial damage zone to obtain the damage evolution path; and generating a safety situation map based on the damage evolution path to obtain a spatiotemporal evolution map of structural risk. This invention significantly improves the accuracy and reliability of predicting the damage evolution process and final safety state of tunnel concrete lining under fire conditions.

This invention relates to the fields of biomedical engineering and temperature control technology, and discloses a method and system for predicting the three-dimensional temperature field during the cooling and rewarming process of organ cryopreservation. The method includes: constructing and preprocessing a simulation dataset and a real experimental dataset covering the cooling and rewarming process; constructing a transient temperature query network, fusing global physical field features, multi-scale local features, and spatial location information; training the model using a fusion physical constraint loss function containing data fitting loss and spatial smoothing loss; and inputting the thermophysical parameters of the organ to be predicted and sparse temperature observation data to achieve accurate prediction of transient temperature at any spatial location. This invention effectively alleviates the prediction bias caused by the difference between simulation and real distributions, improves the model's generalization performance and the physical rationality of the prediction results, and can be directly applied to fine-grained temperature control systems for organ preservation, providing reliable support for organ function protection and improved transplant success rates, thus possessing significant clinical application value.

The application discloses a steam generator feed water flow acquisition method and device, electronic equipment and medium. The method acquires a fluid mechanics simulation model of a steam generator feed water ring. The fluid mechanics simulation model is used for simulating fluid movement in the steam generator feed water ring. The fluid mechanics simulation model is used for respectively performing transient numerical calculation on the temperature in the feed water ring under multiple different low feed water flow conditions, and obtaining transient temperature distribution in the feed water ring under each low feed water flow condition. Based on the transient temperature distribution in the feed water ring under each low feed water flow condition, a temperature time series data set is constructed. An initial recurrent neural network model is trained through the temperature time series data set, and a target recurrent neural network model is obtained. The target recurrent neural network model is used for predicting the feed water flow of the steam generator under the low feed water flow condition, and the accuracy of the steam generator feed water flow acquisition under the low feed water flow condition can be improved.

The utility model discloses a test box with a zoning temperature control function, which comprises a box body, a centrifugal fan is arranged at the air inlet end of the box body, a test chamber is arranged in the box body, the test chamber is divided into a preheating zone, a working zone and a buffer layer along the airflow direction, each zone is provided with an independent temperature control actuator, and the temperature control actuator is connected with the centrifugal fan. The preheating area comprises a liquid nitrogen spraying device arranged at the top of the test chamber and a high-temperature ceramic heating sheet arranged on the side wall of the test chamber, a PTC heating film is embedded in the inner wall of the working area, a micro-channel cold plate is arranged at the bottom of the working area, and the buffer area is provided with a semiconductor chilling plate array and flow guide fins. Transient temperature adjustment is achieved through liquid nitrogen in the preheating area, composite temperature control is achieved through the PTC heating film and the micro-channel cold plate in the working area, temperature fluctuation is dynamically absorbed through the semiconductor chilling plate array in the buffer area, the temperature gradient is formed through one-way airflow, the temperature change rate is increased, and temperature uniformity is guaranteed.

This application relates to a method for fabricating a high-temperature co-fired thermal conductivity measurement sensor and the sensor itself, belonging to the field of sensor technology. This application utilizes an integrated co-fired structure of a metal thick-film pattern and a ceramic green body, enabling the metal thick-film pattern to form a continuous transition interface with the ceramic substrate during sintering. This results in high interfacial bonding strength, effectively mitigating failure problems such as interface delamination, warping, or cracking that easily occur under high-temperature or thermal cycling conditions, thereby improving the structural stability and service life of the sensor. Simultaneously, the co-fired structure effectively blocks the influence of external oxidizing or corrosive samples on the metal layer, making it suitable for complex or extreme testing environments. Since the co-firing process eliminates the bonding layer, this invention reduces the interfacial thermal resistance of Joule heat transfer to the sample during measurement, making the transient temperature rise response more closely match the theoretical heat transfer model, thereby improving the accuracy of thermal conductivity measurement.

This invention relates to the fields of intelligent manufacturing and additive manufacturing technology, specifically to a method for evaluating the performance of metal 3D printing materials based on edge computing. The method includes: constructing a data initialization layer to receive material property parameters of the target processing object and process parameters of the processing equipment, and sending a reference thermal history manifold to the edge nodes; constructing a real-time state update layer to acquire real-time thermal radiation data collected by the processing equipment during processing, and updating the cumulative thermal input state matrix of the voxel corresponding to the current processing area based on the transient temperature gradient; constructing a residual analysis prediction layer to compare the transient temperature gradient with the reference thermal history manifold at the edge nodes to calculate the thermal residual, and outputting the predicted values ​​of the microscopic performance parameters corresponding to the voxel; and constructing a dynamic closed-loop control layer to update the process control state flag for the processing equipment based on the feedforward control command data packet. This invention achieves rapid evaluation of high-dimensional thermodynamic states within a sub-millisecond time window.

This invention relates to the field of fatigue crack prediction technology, specifically a method for predicting the fatigue crack propagation path of external containers in marine cryogenic tanks. The method includes the following steps: extracting acceleration and liquid level to construct a kinetic energy scalar; combining heat flux and cryogenic gradient to generate a cryogenic impact tensor; using transient temperature and principal stress to obtain distortion values ​​and generate dynamic propagation increments; establishing perturbation displacement vectors using strain energy and stiffness inverse matrix; fusing reference displacements to obtain step-crack displacements at each stage and establishing a trajectory coordinate set. In this invention, swaying kinetic energy is established by calculating the inner product of hull acceleration and liquid level; a cryogenic impact tensor is constructed by combining heat flux and cryogenic gradient; propagation increments are generated based on the distortion characteristics of temperature and principal stress fluctuations exceeding limits; perturbation displacements are extracted using energy release rate and stiffness inverse matrix; step-crack displacements are obtained by fusing with reference displacements and then spliced ​​and adjusted to avoid the accumulation of errors from mesh re-division, thus achieving accurate tracking of the propagation trajectory.

This invention discloses a method and device for classifying, attributing, and diagnosing abnormal temperature data collected by an energy storage battery management system (BMS). The method obtains an aligned multi-source time-series dataset by spatiotemporally aligning the battery cluster temperature time-series data, total current data, and individual cell voltage data. It then performs anomaly diagnosis on the underlying communication data link; if anomalies are found, the result is output and the process terminates. Otherwise, it performs transient temperature rise slope anomaly detection based on thermodynamic inertia; if a sudden hardware failure of the NTC sensor is detected, the result is output and the process terminates. If not, it performs thermal runaway risk cell location based on temperature-electric spatial mapping; if located, the result is output and the process ends. If not, it performs frequency domain sawtooth feature identification under coupled high-current conditions; if identified, the result is output and the process ends. If no feature is identified and the temperature continues to exceed the threshold, it is determined to be an external thermal management failure, and a cooling system fault alarm is output. This invention solves the problems of difficulty in detecting abnormal temperature in existing BMS technologies and significant safety hazards.

The present application belongs to the field of automatic control, and discloses a palladium-nickel oil hydrogen rapid response control method and system based on variable temperature fitting, which comprises the following steps: collecting oil sample characteristics and resistance values of Pd-Ni sensitive elements, and judging whether oil sample switching occurs; if no oil sample switching occurs, a corrected resistance change amount is calculated through a fitting algorithm, and the corrected resistance change amount is converted into a hydrogen concentration value; if oil sample switching occurs, variable temperature control of the Pd-Ni sensitive element is performed, and a transient temperature rising stage, a dynamic temperature adjusting stage and a steady state constant temperature stage are executed in sequence; a resistance-temperature-time fitting model is constructed in the variable temperature control process, and whether the resistance value reaches a steady state after the steady state constant temperature stage is completed is analyzed and determined based on the resistance-temperature-time fitting model, and if the resistance value reaches the steady state, it is corrected and converted into a hydrogen concentration value. The present application solves the adaptation problem of different viscosity and temperature new oil samples, and effectively eliminates temperature drift and variable temperature residual interference.

The application relates to a non-uniform partition thermal network modeling method based on temperature gradient prior information, comprising the following steps: acquiring prior temperature gradient information of a power device chip surface; based on the prior temperature gradient information, a plurality of physical partitions with non-uniform areas are obtained by partitioning the power device chip surface; a non-uniform partition thermal network topology is constructed in combination with the number of parallel power device chips; an overload compensation electro-thermal coupling iterative power correction model is constructed, and the output is a partition iterative correction loss power; temperature field data of the power device chip is iteratively solved based on the partition iterative correction loss power, and the transient temperature distribution and the highest junction temperature of the power device chip are obtained based on the temperature field data. Through the construction of the overload compensation electro-thermal coupling iterative power correction model, the output is the partition iterative correction loss power; the power loss change under different load conditions can be dynamically adapted, and the temperature prediction deviation problem caused by the fixed partition and static parameters of the traditional modeling can be effectively solved.

This invention relates to the field of semiconductor processing technology, and particularly to a method for constructing a temperature prediction model for a thermo-pressed bonding heating plate based on domain-decomposition gated PINN. This method is used to predict the global transient temperature field of the heating plate. The method includes: constructing a heat transfer model with a two-dimensional axisymmetric cylindrical coordinate system using the symmetry of the heating plate; dividing the heat transfer model into multiple regions and constructing PINN models for each region, each PINN model having multiple gated units embedded with attention modules; obtaining attention weights for collocation points based on gate signals; adaptively sampling collocation points corresponding to the multiple regions using the attention weights and partial differential equation residuals; training the corresponding PINN models in parallel using the sampled data from each region; performing constraint optimization using a total loss function; iteratively updating the network parameters of the PINN models to obtain the temperature prediction model. This invention also relates to a method, device, medium, and program product for predicting the temperature of a thermo-pressed bonding heating plate based on domain-decomposition gated PINN.

The application discloses a kind of based on heat network's phase change capsule temperature field transient calculation method and system, it is related to phase change capsule technical field, including: constructing phase change capsule physical model and parameter initialization;Four-node heat network model is constructed;Phase change process: preheating stage: all solid surface heat is used for temperature rise, solve four-node coupled heat transfer equation group, output each node transient temperature value;Melting stage: solid surface temperature is fixed at phase change temperature, solve equation group, according to gas phase, liquid phase net heat flow calculation two-phase mixture enthalpy, update solid-liquid mass and volume and output each node transient temperature value;Complete liquefaction stage: solid disappears, liquid node directly exchanges heat with shell wall, calculate heat transfer coefficient, solve equation group, output each node transient temperature value;To each node preheating stage and melting stage between and each node melting stage and complete liquefaction stage between with stage transition smoothing processing.The application greatly improves calculation efficiency, physical model is complete, and numerical stability is good.

This invention provides a precision welding system and control method for tantalum diaphragms and flanges, relating to the field of welding technology. The method includes: determining the boundary conditions for heat accumulation and dissipation at each trajectory point along a reference welding path based on the local geometric characteristics of the tantalum diaphragm and flange; establishing a temperature field distribution model based on the boundary conditions and preset initial welding parameters to obtain a transient temperature change curve; integrating the transient temperature change curve along the thickness direction of the tantalum diaphragm and the radial direction of the flange to calculate the transient thermal expansion displacement; and superimposing the transient thermal expansion displacement onto each trajectory point of the reference welding path to obtain a second welding path. This invention reduces trajectory deviation during the circumferential welding process of the tantalum diaphragm and flange, achieving stable welding of the tantalum diaphragm and flange.