131 results about "Transient temperature" patented technology

The invention discloses a synchronous reluctance motor magnetothermal coupling rapid calculation method based on a dynamic thermal network, and belongs to the technical field of motors. Comprising the following steps: calculating motor loss by adopting a finite element electromagnetic field model, and calculating a convective heat transfer coefficient by adopting a finite element fluid field model; constructing a three-dimensional thermal network comprising conduction, contact, convection thermal resistance, thermal capacity and a heat source, and solving to obtain an average temperature and a boundary temperature of component nodes; constructing a sub-domain temperature field calculation model of the heat source component, and calculating temperature distribution in combination with boundary conditions; introducing average temperature compensation thermal resistance and carrying out dynamic correction; carrying out magnetothermal coupling iteration, and updating the loss and the temperature until the precision is met; and introducing maximum temperature compensation thermal resistance into the thermal network, and solving to obtain an average temperature and a maximum temperature transient temperature rise curve of each component. Based on the technical means of combining electromagnetic field and fluid field finite element simulation with thermal network and subdomain temperature field calculation, efficient calculation of magnetothermal coupling of the synchronous reluctance motor is achieved.

The invention discloses an experimental device and method for positioning and artificially manufacturing fractures in a borehole and expanding the fractures. The experimental device comprises a tubular column carrier unit, and a positioning anchoring system, a mechanical fracture forming pretreatment system, a thermal shock fracturing system and a control terminal which are integrated on the tubular column carrier unit. The positioning anchoring system is used for detecting the well wall and locking the target depth and direction; the mechanical crack-making pretreatment system is used for cutting at the locking position to form an initial physical gap; the thermal shock fracturing system presets a thermal stress field through a heating assembly, and utilizes a cold shock assembly to spray low-temperature fluid to generate transient temperature difference stress to induce cracks to crack from notches and expand. And the control terminal controls the action time sequence of each system. According to the method, through the mode of mechanical drilling and thermal coupling, fixed-point and directional accurate fracture forming in a borehole is achieved, the generated fracture shape is close to that of a natural fracture, and the problems that a traditional method is inaccurate in positioning, uncontrollable in shape and large in damage to the whole sample are solved.

The invention relates to the technical field of power supply or power distribution circuit devices of power systems, and discloses a power distribution loop self-reset state control system based on thermal parameter feedback, which comprises a thermal parameter acquisition module used for acquiring a physical heat dissipation temperature sequence of a power supply node after tripping; the historical load mapping module is used for calculating a closing transient temperature rise estimated value according to the load characteristic data within 24 hours before tripping and generating a dynamic correction value of a heat dissipation slope judgment boundary; the logic arbitration module is used for calculating the deviation degree of the heat dissipation slope of the double-window sampling sequence and judging whether the deviation degree is converged into a heat dissipation slope judgment boundary updated according to the dynamic correction amount or not; according to the invention, through a closed loop arbitration mechanism of a heat dissipation characteristic slope, a physical heat dissipation steady state inflection point is identified, a maloperation risk caused by environment thermal resistance drift and closing inrush current impact is eliminated, and power supply continuity is guaranteed.

The invention belongs to the technical field of power semiconductor devices. The invention provides a SiC MOSFET surge current transient electrothermal coupling failure modeling method. A real packaging three-dimensional structure model is established, and material parameters are defined; dividing grids, constructing a current and solid heat transfer module, applying surge waveform data and realizing real-time coupling; carrying out transient solution to obtain temperature data, extracting a hot spot area and comparing thermodynamic critical parameters of the material; and establishing a multi-class failure mechanism model, and outputting a failure prediction result and reliability evaluation. The method is high in structural reduction degree, transient temperature rise and hot spot distribution can be accurately simulated, the problems that modeling is not accurate, transient electrothermal coupling analysis is lacked and a real failure mode cannot be reflected in the prior art are solved, the failure position, mode and threshold value can be accurately predicted, the method is suitable for reliability evaluation under the multi-surge condition, and the method is suitable for popularization and application. And the method has engineering application value and research significance.

The invention relates to the technical field of interface thermal resistance calculation, and discloses a method for measuring and calculating interface thermal resistance based on an infrared imaging technology, which comprises the following steps: fixing and aligning paired upper and lower test pieces to form a to-be-measured contact interface, respectively preheating to a preset initial temperature difference and stabilizing, and monitoring and recording temperature change and test piece thermophysical parameters; enabling the test piece to be in contact, starting infrared imaging equipment to record full-field transient temperature data in a temperature equalization process, and forming a three-dimensional data matrix; building a thermal resistance correlation model, constructing a heat conduction equation in combination with the parameters to solve a simulated temperature field, and inverting related heat conduction coefficients by using a conjugate gradient method; and calculating microscopic and total contact thermal resistance according to the inversion coefficient and the geometric parameters, and deducing macroscopic thermal resistance. According to the method, non-intrusive transient infrared temperature measurement is combined with a reverse heat transfer algorithm, so that the microscopic thermal resistance, the macroscopic thermal resistance and the total contact thermal resistance are accurately distinguished and quantified.

The invention discloses an extra-high voltage transformer bushing transient temperature rise rapid prediction method, which comprises the steps of constructing a simulation model of an extra-high voltage transformer bushing, and simulating and extracting global node temperatures and corresponding working condition parameters of a bushing profile at multiple moments to form a data set; selecting global node temperature to perform orthogonal decomposition, and selecting first r-order modals to construct a modal matrix according to cumulative energy proportion truncation; projecting global node temperature in the data set to a modal space according to a modal matrix to obtain a modal coefficient vector as an output sequence, and performing sliding window on working condition parameters in the data set to form an input sequence; constructing a long-short-term memory network model, optimizing network hyper-parameters of the long-short-term memory network model, and training the model by adopting an input sequence and an output sequence to obtain a time sequence mapping model; and acquiring working condition parameters of the extra-high voltage transformer bushing in a to-be-measured time period, inputting the working condition parameters into the time sequence mapping model, predicting a modal vector at a future moment, and reconstructing transient temperature field distribution of the extra-high voltage transformer bushing in combination with inversion of a modal matrix.

The invention relates to a silicone rubber insulator laser cleaning parameter optimization method based on multi-physics field simulation. The method comprises the following steps that 1, a multi-physics field coupling finite element model of a pulse laser cleaning silicone rubber surface aging layer is established; step 2, calculating a temperature field evolution curve and a thermal stress field evolution curve of the key area of the aging layer under different laser power parameters based on the multi-physics field coupling finite element model constructed in the step 1; and step 3, based on the temperature field and thermal stress field evolution curves of the key area of the aging layer under different laser powers obtained in the step 2, analyzing a synergistic effect relationship between vibration and an ablation mechanism, obtaining time-space distribution characteristics of the temperature and thermal stress of the silicone rubber aging layer under the action of pulse laser, and screening out the silicone rubber aging layer which can realize initial stripping of the aging layer through thermal stress. And thorough removal can be realized through thermal decomposition, and a power interval in which a matrix is damaged due to too high energy is avoided. According to the method, evolution of a transient temperature field and a thermal stress field can be accurately simulated, and the space-time synergistic effect of vibration and an ablation mechanism is quantitatively analyzed, so that a safe and efficient process parameter window is predetermined, and scientific guidance is provided for actual cleaning production.

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.

The application provides a high-voltage bushing gas transient temperature calculation and state diagnosis method and device and a storage medium. The method comprises the following steps: collecting a high-voltage bushing gas pressure value, a shell temperature value and an ambient temperature value of the device; calculating an ambient temperature influence effective value; calculating a high-voltage bushing gas transient temperature value; calculating a temperature field model parameter; calculating a high-voltage bushing gas transient temperature value; calculating a high-voltage bushing gas molar density value; and performing state diagnosis on the high-voltage bushing according to a set diagnosis threshold value. Through the technical scheme provided by the application, the oil and gas pressure value in the high-voltage bushing can be monitored online for 24 hours without interruption, the running and fault states in the high-voltage bushing can be evaluated, accidents can be prevented, and a feasible means is provided for real-time monitoring of the running and fault states of the device.

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).

The invention discloses an eccentric circular ring transient temperature field rapid calculation method based on conformal mapping, and belongs to the technical field of heat conduction numerical calculation and computer simulation, and the method comprises the steps: 1, converting an eccentric circular domain of a physical plane into a concentric circular domain of an image plane through conformal mapping, and building a coordinate corresponding relation between the two domains; step 2, constructing a finite difference numerical discrete model introducing scale factor correction, and flexibly selecting an explicit, semi-implicit or fully implicit difference format for solving according to actual requirements; and step 3, performing inverse mapping reduction to obtain a transient temperature field of the physical plane eccentric circular domain. According to the method, the calculation efficiency is remarkably improved while the calculation precision is guaranteed, and the method is particularly suitable for temperature field simulation and monitoring of the eccentric circular ring structure with the high real-time performance requirement.

The invention discloses an earth and rockfill dam seepage multi-parameter decoupling monitoring method based on a five-core ultra-weak optical cable. The earth and rockfill dam seepage multi-parameter decoupling monitoring method comprises the steps that the five-core ultra-weak optical cable is arranged, and a carbon fiber reinforced polymer layer serves as a center reference core of a heating element and four outer cores which are orthogonally distributed in a cross shape; applying constant current with different gradients to generate thermal excitation and collecting wavelength dynamic response data of each core; the transient temperature rise data of the four outer cores in the heating process are compared, and the azimuth angle and the seepage rate of seepage in the dam are inverted; the strain wavelength data of the four outer cores are decoupled through the wavelength data of the center reference core, and the axial main strain of the dam is extracted; and calculating a resultant curvature intensity, a bending direction angle and a displacement curve of vertical and horizontal displacement based on the decoupled outer core strain wavelength data. According to the invention, high-precision cooperative monitoring of seepage, deformation and pre-stress states of the earth-rock dam is realized, and the safety of the dam is effectively guaranteed.

The invention discloses a multi-domain coupling transient temperature field rapid calculation method based on a C-N format, and belongs to the field of plate shape detection, and the method comprises the steps: dividing a plate shape roller into a roller body domain, a sensor domain and a coupling boundary shared by the two domains, and building a plate shape roller double-domain coupling heat conduction numerical model and mapping discretization; the method comprises the following steps of: performing time discretization on a whole roll area of a strip-shaped roll by adopting a Crank-Nicolson format; based on a discrete result, respectively calculating sparse matrixes of a roller body domain, a sensor domain and a coupling boundary shared by the two domains, assembling a global sparse linear equation set, and solving to obtain temperature field distribution data of the two domains at the next moment; and mapping the solved temperature field distribution of the roller body domain on the image plane back to the physical plane through inverse transformation of conformal mapping, and forming a complete transient coupling temperature field of the full physical domain with the temperature field of the sensor domain. According to the method, rapid, stable and high-precision calculation of the overall transient temperature field of the strip-shaped roller is realized.

The invention discloses a method, a system, equipment, a medium and a product for determining the state of a tower leg of a power transmission tower in a severe cold area, and relates to the field of tower leg freezing damage calculation, the method comprises the following steps: determining a water layer transient temperature field of the tower leg of the power transmission tower based on a finite element simulation mode according to a heat conduction differential equation and boundary conditions of a water layer; based on a finite element simulation mode, treating phase change latent heat of the water-ice phase change interface by adopting an apparent heat capacity method, and determining a phase change result; the phase change result is icing thickness; according to the tower leg structure parameters, the tower leg steel yield strength is determined; based on the transient temperature field of the water layer, the extrusion pressure intensity of ice on the tower legs is determined in combination with the icing thickness; according to the tower leg structure parameters, the icing thickness and the extrusion pressure intensity, tower leg combined stress is determined; determining the state of the tower leg according to the combined stress of the tower leg and the yield strength of tower leg steel; the tower leg state comprises a freezing damage risk state and a safety state. The method can quickly identify the freezing damage condition of the tower leg.

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 invention discloses a coal mine explosion-proof electric appliance short circuit protection and temperature characteristic inspection system, which comprises a temperature measurement transmission device, a short circuit protection detection device, a data receiving and storage device and a digital display operation table, and is characterized in that the temperature measurement transmission device comprises a temperature collector and a data transmission terminal; the short-circuit protection detection equipment comprises a current transformer and a short-circuit protection data signal transmitter; and the data receiving and storing equipment comprises an explosion-proof electric appliance short-circuit protection and transient temperature data receiver, an environment temperature sensor and a data memory. According to the technical scheme, the technical problems of complicated wiring, difficult operation, low test precision and difficult real-time data transmission of the temperature test in the explosion-proof electric appliance are solved, and the space deployment flexibility, the temperature test anti-interference capability and the test level are improved. Meanwhile, the system has the multi-node distributed monitoring capability, improves the short-circuit protection and temperature characteristic inspection and test efficiency, saves the power resources, and saves the time and cost.

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 invention provides an evaluation method for current-carrying temperature rise of a grounding electrode wire, computer equipment and a medium. The evaluation method comprises the following steps: acquiring a model parameter, an environment parameter and an operation parameter of the wire; constructing a wire transient temperature calculation model based on the model parameters, the environment parameters and the operation parameters; calculating temperature-time relation curves under different working conditions according to the wire transient temperature calculation model, and forming a transient temperature rise relation curve library; and on the basis of the transient temperature rise relation curve library and the working condition change of the wire, evaluating the temperature rise allowable time of the wire in a set temperature interval. According to the evaluation method, by means of a temperature rise relation curve library established in a transient state according to a transient temperature calculation model, the temperature rise allowable time of the wire in any temperature interval can be accurately calculated and evaluated in the dynamic change process of the current-carrying working condition of the wire, so that the wire is accurately monitored to avoid the occurrence of a wire overload accident.

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 invention relates to the technical field of data processing, in particular to a 3D printing material defect detection method and system based on multi-sensor fusion. The method comprises the steps of capturing thermal radiation flux and a pose change track, extracting thermodynamic divergence and a transient motion vector, constructing a spatial delay compensation coefficient by combining a heat exchange dissipation coefficient, generating a priori estimation set by a feedforward correction state prediction matrix, constructing a divergence suppression factor according to a transient temperature change rate, and multiplying the divergence suppression factor into a covariance prediction link. Filtering to generate a posterior estimation set, extracting a reflectivity optical gradient for cross-domain verification, mapping an optical reference and calculating a residual matrix, superposing a high-frequency residual to the posterior estimation set, generating a defect reconstruction set, and analyzing the set to output defect space coordinates and morphology distortion information. According to the invention, the printing material defect detection precision is obviously improved.

The application provides a micro-transient temperature field detection system and method. The detection system comprises: a light source module adapted to emit laser light; a sensing module comprising a reference grating and an atomic force probe; a feedback control module connected to the atomic force probe in the sensing module, the feedback control module being adapted to obtain a surface topography scanning result of a sample to be measured after the atomic force probe scans the sample to be measured; and a data processing terminal configured to process temperature sensing information by a spectral inversion algorithm and combine the surface topography scanning result to obtain a temperature field distribution of the surface of the sample to be measured. The micro-transient temperature field detection system and method can improve the accuracy and speed of micro-transient temperature field detection, and the detection result has high spatial and temporal resolution.

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.

The invention relates to the technical field of magnetic suspension bearing testing, and discloses a magnetic suspension bearing temperature testing device for a vehicle-mounted flywheel battery, and the device comprises a basic platform. The high-speed driving assembly is detachably connected with the basic platform; the vacuum environment simulation assembly is detachably connected with the basic platform; an isolation sleeve is arranged on the side of the vacuum environment simulation assembly, and the high-speed driving assembly corresponds to the isolation sleeve; the magnetic suspension bearing fixing assembly is located in the vacuum environment simulation assembly; the protection device assemblies are located on the two sides of the bearing to be tested; and the rotating shaft connecting assembly is located between the protection device assembly and the isolation sleeve. According to the invention, steady-state and transient-state temperature characteristic testing of the magnetic suspension bearing under a real operation condition is realized, and a reliable experimental basis is provided for thermal characteristic analysis, structure optimization design, thermal management strategy formulation and magnetic-thermal coupling model establishment of the magnetic suspension bearing.

The invention discloses a steel bar-concrete composite structure time sequence collaborative forming process method based on multi-arc parallel electric arc additive manufacturing, and belongs to the technical field of additive manufacturing. The method comprises the following steps: designing a steel bar space structure and planning a multi-head path according to a bearing requirement; a single-wire single-arc or double-heat-source deposition mode is selected according to the diameter of the steel bar, and technological parameters are adjusted in a self-adaptive mode according to the space forming angle to achieve 0-90-degree full-angle support-free forming; a thermal field coupling control and safety distance avoidance strategy is implemented during multi-arc parallel manufacturing; determining a concrete manufacturing time sequence window (80-200 DEG C) after the steel bars are cooled based on a transient temperature field evolution model, and realizing layer-by-layer alternate forming of the steel bars and the concrete through a partition and time sequence division strategy; quality monitoring and closed-loop control are implemented in the whole process.

The present application belongs to the technical field of numerical simulation of laser directed energy deposition, and relates to a numerical simulation method for the influence of process parameters on the temperature field of laser directed energy deposition of Inconel 718. When calculating the transient temperature field distribution in the process of laser directed energy deposition, the present application needs to complete the definition of material properties, the establishment of a geometric model and mesh division, the establishment of a transient temperature field control equation, the application of a heat source, the application of initial conditions and boundary conditions, the discrete processing of a transient temperature field finite element equation set, latent heat processing, and iterative solving of several parts of work. The numerical simulation method of the present application studies the temperature distribution law in the process of laser directed energy deposition of Inconel 718 material, analyzes the influence of process parameters on the temperature field, establishes and perfects the theoretical basis of laser directed energy deposition of Inconel 718 material, and guides the formulation of process parameters, which has important scientific research significance and engineering application value.

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.