Electric field simulation method and device for electrochemical jet machining, equipment and medium

Abstract

The invention relates to an electric field simulation method and device for electrochemical jet machining, electronic equipment and a computer readable storage medium, relates to the technical field of computer simulation, and can be applied to electro-hydraulic beam drilling machining scenes. The method comprises the following steps: constructing a modeling domain of a geometric model of the air film hole forming process, wherein the modeling domain is generated based on a jet flow field of electrolyte; determining model features of the geometric model, and constructing a jet electric field model based on the modeling domain and the model features; determining model parameters and model boundary conditions corresponding to the jet electric field model; based on the model parameters and the model boundary conditions, simulation calculation is carried out on the jet flow electric field model, hole geometrical shapes at different moments are obtained, and the hole geometrical shapes are used for reflecting the incidence relation between the model parameters and the hole making process quality. According to the method, the jet flow electric field model in electro-hydraulic beam hole making is established, simulation calculation is carried out, and therefore the influence of all model parameters on the hole making quality is analyzed, and an effective scheme is provided for improving the hole making quality.

Description

Background Art

[0002] Modern aircraft engine design constantly pursues high thrust (power)-to-weight ratio and high efficiency, and the temperature before the turbine continues to increase. The temperature before the turbine or the temperature at the combustion chamber outlet represents the technical level of a generation of aircraft engines to a certain extent. The high-pressure turbine blades must not only have extremely high temperature resistance, but also maintain sufficient strength and life under extreme working conditions with strong gas flow driving force and high-speed centrifugal force. Turbine blades generally use directionally solidified high-temperature alloys or single crystal alloys to ensure the high-temperature resistance of the material itself. The structure adopts a hollow structure with no excess precision casting, and through a large number of air film cooling holes, the cooling medium forms a low-temperature cold air film, which plays a role in heat insulation and cooling.

[0003] Among various hole-making processes, electro-hydraulic beam machining is a cold working method based on the principle of electrochemical anode dissolution. This processing method does not require the use of a shaped cathode electrode tool with the same shape as the workpiece, and there is no wear and loss on the tool cathode, which is highly flexible and convenient.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] The purpose of the present disclosure is to provide an electric field simulation method for electrochemical jet machining, an electric field simulation device for electrochemical jet machining, an electronic device and a computer-readable storage medium, thereby at least to a certain extent overcoming the problem that in the electro-hydraulic jet hole making process, due to the influence of parameter selection and stability, the surface quality and morphology of the small holes may change in actual hole making, resulting in the appearance of bell-mouths, hole edge overlap and the like.

[0006] Other features and advantages of the present disclosure will become apparent from the following detailed description, or may be learned in part by the practice of the present invention.

[0007] According to a first aspect of the present disclosure, there is provided an electric field simulation method for electrochemical jet machining, comprising: constructing a modeling domain of a geometric model of an air film hole making process, wherein the modeling domain is generated based on a jet field of an electrolyte; determining model features of the geometric model, and constructing a jet electric field model based on the modeling domain and the model features; determining model parameters and model boundary conditions corresponding to the jet electric field model; and simulating and calculating the jet electric field model based on the model parameters and the model boundary conditions to obtain hole geometries at different times, wherein the hole geometries are used to reflect the correlation between the model parameters and the quality of the hole making process.

[0008] In an exemplary embodiment of the present disclosure, constructing a jet electric field model based on the modeling domain and the model features includes: determining the model symmetry mode of the geometric model according to the model features; determining the physical field configuration information corresponding to the geometric model; constructing an initial jet electric field model according to the modeling domain, the model symmetry mode and the physical field configuration information; and performing geometric deformation processing on the initial jet electric field model to obtain the jet electric field model.

[0009] In an exemplary embodiment of the present disclosure, the geometric deformation processing of the initial jet electric field model to obtain the jet electric field model includes: applying a preconfigured potential difference between the anode workpiece and the cathode tool of the air film hole making process; based on the potential difference, determining the initial geometric shape of the jet electric field model; introducing a rectangular seed deformation into the initial geometric shape to obtain the jet electric field model.

[0010] In an exemplary embodiment of the present disclosure, the model parameters include a boundary geometric deformation rate, and the determination of the model parameters and model boundary conditions corresponding to the jet electric field model includes: configuring corresponding electrode voltages for the anode workpiece and the cathode tool, respectively, and the anode and the cathode have the same equilibrium potential; under the electrode voltage, determining the boundary geometric deformation rate generated by the electrode reaction of the anode workpiece in the normal direction; and determining the model boundary conditions according to the geometric deformation characteristics of the jet electric field model.

[0011] In an exemplary embodiment of the present disclosure, determining the boundary geometric deformation rate generated by the electrode reaction of the anode workpiece in the normal direction includes: determining the local current density of the electrode reaction; obtaining electrode reaction parameters associated with the electrode reaction, the electrode reaction parameters including stoichiometric coefficient, molar mass, density of dissolved substances, number of electrons in the dissolution reaction, and Faraday constant; determining the boundary geometric deformation rate based on the local current density and the electrode reaction parameters.

[0012] In an exemplary embodiment of the present disclosure, determining the local current density of the electrode reaction includes: obtaining the current distribution corresponding to the electrode reaction, determining the boundary normal and the electrolyte current density vector corresponding to the current distribution; and determining the local current density based on the boundary normal and the electrolyte current density vector.

[0013] In an exemplary embodiment of the present disclosure, the jet electric field model is simulated and calculated based on the model parameters and the model boundary conditions to obtain the hole geometry at different times, including: determining a simulation time interval for simulating the jet electric field model, and selecting a simulation time point based on the simulation time interval; under the model boundary conditions, determining the model state of the jet electric field model at different simulation time points to obtain a simulation result graph; the simulation result graph includes an electrolyte potential graph, an electrolyte current density graph, and a hole shape graph; the hole geometry is obtained based on the hole shape graph, and the model parameters to be adjusted are determined according to the hole geometry.

[0014] According to a second aspect of the present disclosure, there is provided an electric field simulation device for electrochemical jet machining, comprising: a modeling domain construction module, for constructing a modeling domain of a geometric model of an air film hole making process, wherein the modeling domain is generated based on a jet field of an electrolyte; a model construction module, for determining model features of the geometric model, and constructing a jet electric field model based on the modeling domain and the model features; a parameter condition determination module, for determining model parameters and model boundary conditions corresponding to the jet electric field model; and a simulation calculation module, for performing simulation calculations on the jet electric field model based on the model parameters and the model boundary conditions to obtain hole geometries at different times, wherein the hole geometries are used to reflect the correlation between the model parameters and the quality of the hole making process.

[0015] In an exemplary embodiment of the present disclosure, the model construction module includes a model construction unit, which is used to: determine the model symmetry mode of the geometric model according to the model characteristics; determine the physical field configuration information corresponding to the geometric model; construct an initial jet electric field model according to the modeling domain, the model symmetry mode and the physical field configuration information; perform geometric deformation processing on the initial jet electric field model to obtain the jet electric field model.

[0016] In an exemplary embodiment of the present disclosure, the model building unit includes a model building sub-unit, which is used to: apply a preconfigured potential difference between the anode workpiece and the cathode tool of the air film hole making process; determine the initial geometric shape of the jet electric field model based on the potential difference; introduce a rectangular seed deformation into the initial geometric shape to obtain the jet electric field model.

[0017] In an exemplary embodiment of the present disclosure, the model parameters include a boundary geometric deformation rate, and the parameter condition determination module includes a parameter condition determination unit, which is used to: configure corresponding electrode voltages for the anode workpiece and the cathode tool, respectively, and the anode and the cathode have the same equilibrium potential; under the electrode voltage, determine the boundary geometric deformation rate generated by the electrode reaction of the anode workpiece in the normal direction; determine the model boundary conditions according to the geometric deformation characteristics of the jet electric field model.

[0018] In an exemplary embodiment of the present disclosure, the parameter condition determination unit includes a deformation speed determination unit, which is used to: determine the local current density of the electrode reaction; obtain electrode reaction parameters associated with the electrode reaction, the electrode reaction parameters including stoichiometric coefficient, molar mass, dissolved substance density, number of electrons in the dissolution reaction, and Faraday constant; determine the boundary geometry deformation speed based on the local current density and the electrode reaction parameters.

[0019] In an exemplary embodiment of the present disclosure, the deformation speed determination unit includes a current density determination subunit, which is used to: obtain the current distribution corresponding to the electrode reaction, determine the boundary normal and the electrolyte current density vector corresponding to the current distribution; and determine the local current density based on the boundary normal and the electrolyte current density vector.

[0020] In an exemplary embodiment of the present disclosure, the simulation calculation module includes a simulation calculation unit, which is used to: determine a simulation time interval for simulating the jet electric field model, and select a simulation time point based on the simulation time interval; under the model boundary conditions, determine the model state of the jet electric field model at different simulation time points to obtain a simulation result graph; the simulation result graph includes an electrolyte potential graph, an electrolyte current density graph, and a pore shape graph; obtain the pore geometry based on the pore shape graph, and determine the model parameters to be adjusted according to the pore geometry.

[0021] According to a third aspect of the present disclosure, there is provided an electronic device, comprising: a processor; and a memory, wherein the memory stores computer-readable instructions, and when the computer-readable instructions are executed by the processor, the electric field simulation method for electrochemical jet machining according to any one of the above items is implemented.

[0022] According to a fourth aspect of the present disclosure, there is provided a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the electric field simulation method for electrochemical jet machining according to any one of the above items is implemented.

[0023] The technical solution provided by the present disclosure may have the following beneficial effects:

[0024] The electric field simulation method of electrochemical jet machining in the exemplary embodiment of the present disclosure, on the one hand, by constructing a jet electric field model and performing simulation calculations, is conducive to obtaining the influence of different processing parameters on the quality of electro-hydraulic jet drilling, thereby providing a valuable reference for the optimization of the electro-hydraulic jet drilling process. On the other hand, by establishing a jet electric field model, the model parameters can be changed and calculated conveniently and quickly, which is suitable for simulation research in various situations.

[0025] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0027] Figure 1 A flow chart schematically shows an electric field simulation method for electrochemical jet machining according to an exemplary embodiment of the present disclosure;

[0028] Figure 2 Schematically shows a process diagram of establishing a jet electric field according to an exemplary embodiment of the present disclosure;

[0029] Figure 3 Schematically shows a geometric diagram of a jet electric field model according to an exemplary embodiment of the present disclosure;

[0030] Figure 4 schematically shows an electrolyte potential diagram of a jet electric field model according to an exemplary embodiment of the present disclosure;

[0031] Figure 5 schematically shows an electrolyte current density diagram of a jet electric field model according to an exemplary embodiment of the present disclosure;

[0032] Figure 6 Schematically illustrates a hole geometry diagram of a hole making process according to an exemplary embodiment of the present disclosure;

[0033] Figure 7 Schematically shows a block diagram of an electric field simulation device for electrochemical jet machining according to an exemplary embodiment of the present disclosure;

[0034] Figure 8 A block diagram of an electronic device according to an exemplary embodiment of the present disclosure is schematically shown;

[0035] Fig. 9 A schematic diagram of a computer-readable storage medium according to an exemplary embodiment of the present disclosure is schematically shown. DETAILED DESCRIPTION

[0036] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0037] In addition, the described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, known structures, methods, devices, implementations, materials or operations are not shown or described in detail to avoid blurring the various aspects of the present disclosure.

[0038] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or these functional entities or parts of functional entities may be implemented in one or more software hardened modules, or these functional entities may be implemented in different networks and / or processor devices and / or microcontroller devices.

[0039] In principle, electro-hydraulic beam drilling ensures the technical requirements of no recast layer, no microcracks, and no heat-affected zone on the surface of the small hole. However, due to the influence of parameter selection and stability, the surface quality and morphology of the small hole will change in actual drilling, such as the corrugation of the hole wall caused by the jump of parameters, the flare caused by the drastic change of the processing state at the inlet and outlet, the overlap of the hole edge, etc. Electro-hydraulic beam drilling is a complex processing process, which involves both the process of anode metal dissolution and the role of chemical processing. In actual processing, the amount of metal removed is much greater than the sum of the amount of metal removed by electrochemical action calculated according to Faraday's law and the amount of metal removed by chemical action, and the current density is also greater than the current density when bubbles occur stably under ordinary electrochemical processing.

[0040] Based on this, the embodiments of the present disclosure propose an electric field simulation method for electrochemical jet machining, an electric field simulation device for electrochemical jet machining, a computer-readable medium, and an electronic device.

[0041] In this article, it is necessary to understand that the terms involved, such as electro-hydraulic beam, electro-hydraulic beam machining is a micro-electrolytic machining method that uses a nozzle to spray charged electrolyte to dissolve the metal material at the anode for machining. It has the advantages of no tool cathode loss, no macro-cutting force, and is suitable for machining various difficult-to-cut material parts and thin-walled parts.

[0042] In this example embodiment, an electric field simulation method for electrochemical jet machining is first provided. The electric field simulation method for electrochemical jet machining of the present disclosure can be implemented by using a server, or by using a terminal device. The terminal described in the present disclosure may include mobile terminals such as mobile phones, tablet computers, laptop computers, PDAs, and personal digital assistants (PDAs), as well as fixed terminals such as desktop computers. Figure 1 The schematic diagram schematically shows the flow of the electric field simulation method for electrochemical jet machining according to some embodiments of the present disclosure. Figure 1 The electric field simulation method of electrochemical jet machining may include the following steps:

[0043] Step S110, constructing a modeling domain of a geometric model of the air film hole making process, wherein the modeling domain is generated based on a jet field of an electrolyte.

[0044] According to some exemplary embodiments of the present disclosure, the modeling domain may be a value range or a possible value set of a data element in the modeling process.

[0045] In order to analyze the influence of various processing parameters on the quality of electro-hydraulic beam drilling, a jet electric field model in electro-hydraulic beam drilling is established in this embodiment. Before the model is constructed, a modeling domain corresponding to the geometric model can be constructed. Due to the high conductivity of metals, the potential gradient in the electrode is expected to be very small, so the electrode domain is not included in the model; and the insulating layer is electrochemically inert, so it is not included. In the modeling process, the only modeling domain selected is the electrolyte, and the influence of the electrode domain and the insulating layer is not considered. The modeling domain can be generated according to the jet field of the electrolyte.

[0046] Step S120, determining the model features of the geometric model, and constructing a jet electric field model based on the modeling domain and the model features.

[0047] According to some exemplary embodiments of the present disclosure, the geometric model may be a model reflecting the geometric shape of the hole obtained by processing in the electro-hydraulic jet drilling process. The model features may be specific morphological features of the geometric model. The jet electric field model may be a model generated by the primary current distribution of the electrolyte constructed based on the modeling domain and the model features.

[0048] After determining the modeling domain of the geometric model, determine the model features of the geometric model. For example, you can select the model symmetry mode in the model creation configuration interface according to the model features. The physical field can be configured according to the research content, and then the jet electric field model is constructed based on the modeling domain, model features, and related information of the physical field configuration.

[0049] Step S130, determining model parameters and model boundary conditions corresponding to the jet electric field model.

[0050] According to some exemplary embodiments of the present disclosure, the model parameters may be parameters related to the jet electric field model. The model boundary conditions refer to the law of variation of the model variables at the boundary of the solution area with time and location.

[0051] After constructing the jet electric field model, the electrolytic cell can be simulated with a primary current distribution according to the flow characteristics of the electrolyte, the boundary geometry deformation velocity generated by the anode-electrode reaction in the normal direction can be determined, the model parameters used to solve the boundary geometry deformation velocity can be defined, and the model boundary conditions can be set as follows: the movement of all boundaries except the anode in the normal direction is zero, and there is no deformation at the two electrode boundaries.

[0052] Step S140, based on the model parameters and the model boundary conditions, the jet electric field model is simulated and calculated to obtain the hole geometry at different times, and the hole geometry is used to reflect the correlation between the model parameters and the hole making process quality.

[0053] According to some exemplary embodiments of the present disclosure, the hole geometry may be geometric variations of the holes generated at different time points in the hole making process.

[0054] Under the constraints of the above model boundary conditions, the jet electric field model is simulated and calculated based on the model parameters. For example, a 1s transient simulation study of the electrochemical processing of the hole is carried out to obtain the electrolyte potential map, electrolyte current density map and hole shape map, etc. The hole geometry at different times can be determined from the hole shape map. Since the hole geometry can reflect the correlation between the model parameters and the hole making process quality, according to the above correlation and the change characteristics of the hole geometry at different times, the influence of different model parameters on the hole making process quality can be analyzed, thereby providing effective data support for the optimization of the hole making process.

[0055] According to the electric field simulation method of electrochemical jet machining in this example embodiment, on the one hand, by constructing a jet electric field model and performing simulation calculations, it is helpful to obtain the influence of different processing parameters on the quality of electro-hydraulic jet drilling, thereby providing a valuable reference for the optimization of the electro-hydraulic jet drilling process. On the other hand, by establishing a jet electric field model, the model parameters can be changed and calculated conveniently and quickly, which is suitable for simulation research in various situations.

[0056] Next, the electric field simulation method of electrochemical jet machining in this example embodiment will be further described.

[0057] In an exemplary embodiment of the present disclosure, a jet electric field model is constructed based on a modeling domain and model features, including: determining a model symmetry mode of a geometric model according to model features; determining physical field configuration information corresponding to the geometric model; constructing an initial jet electric field model according to the modeling domain, the model symmetry mode and the physical field configuration information; and performing geometric deformation processing on the initial jet electric field model to obtain a jet electric field model.

[0058] Among them, the model symmetry mode can be the symmetry mode of the model determined based on the symmetry axis of the model. The physical field refers to the distribution of physical properties existing in space, which exerts forces on matter. The physical field configuration information can be the information generated by the configuration operation of the physical field during the modeling process. The initial jet electric field model can be an initial model constructed based on the determined modeling domain, model symmetry mode and physical field configuration information. Geometric deformation processing can be related operations that introduce other types of geometric deformations under the initial geometric shape of the geometric model.

[0059] In the process of model building, select the model symmetry mode in the model wizard window according to the model characteristics. For example, select the model symmetry mode as two-dimensional axisymmetry. By setting the above symmetry mode, the amount of calculation for subsequent model operations can be reduced. Then, according to the research content, select "Electrochemistry to Electroplating", "Deformed Geometry to Electroplating" and primary current in the physical field selection tree to obtain the physical field configuration information corresponding to the geometric model.

[0060] refer to Figure 2 , Figure 2 The process diagram of establishing the jet electric field according to the exemplary embodiment of the present disclosure is schematically shown. In step S210, a geometric model is established. A modeling domain is selected based on the geometric model, and a jet electric field model is constructed by combining model features and physical field selection. After determining the modeling domain, model symmetry mode, and physical field configuration information, a drawing can be drawn according to the model geometry to construct an initial jet electric field model.

[0061] In order to avoid the occurrence of singularities at the contact point between the electrolyte and the insulating boundary and to force zero vertical deformation along the insulator / anode contact line, the initial jet electric field model can be geometrically deformed to obtain the jet electric field model. Through the above steps, a jet electric field model for the electro-hydraulic beam hole making process can be established, so that the current distribution and the shape evolution of the hole can be simulated based on the jet electric field model, and the influence of various parameters on the hole making quality can be deeply understood.

[0062] In an exemplary embodiment of the present disclosure, the initial jet electric field model is subjected to geometric deformation processing to obtain the jet electric field model, including: applying a preconfigured potential difference between the anode workpiece and the cathode tool of the air film hole making process; based on the potential difference, determining the initial geometric shape of the jet electric field model; introducing a rectangular seed deformation into the initial geometric shape to obtain the jet electric field model.

[0063] The pole where oxidation occurs is called the anode, which corresponds to the cathode. The potential difference can be a physical quantity of the energy difference between the anode workpiece and the cathode tool due to the different potentials. The initial geometry can be the geometry of the model under the action of the primary current distribution after the model is built.

[0064] For the initial jet electric field model, the electrolyte enters the electrolytic cell at high speed from the upper boundary and is discharged through the hole at the bottom boundary. A potential difference of a preset value (such as 20V) is applied between the anode workpiece and the cathode tool, resulting in gas evolution on the cathode and metal dissolution or removal on the anode, and an insulating layer is placed on top of the anode.

[0065] refer to Figure 3 , Figure 3 The geometric diagram of the jet electric field model according to an exemplary embodiment of the present disclosure is schematically shown. The jet electric field model can be obtained by introducing a small rectangular seed deformation extending from the anode at z=0 to the insulating layer / below the insulating layer in the initial geometry (t=0). This is done to avoid singularities at the contact point between the electrolyte and the insulating boundary and to avoid singularities along the insulator / anode contact line ( Figure 3 The dotted line between the insulating material and the anode workpiece) forces zero vertical deformation.

[0066] In an exemplary embodiment of the present disclosure, for step S130, the model parameters and model boundary conditions corresponding to the jet electric field model are determined, including: respectively configuring corresponding electrode voltages for the anode workpiece and the cathode tool, and the anode and the cathode have the same equilibrium potential; under the electrode voltage, determining the boundary geometric deformation velocity generated by the electrode reaction of the anode workpiece in the normal direction; and determining the model boundary conditions based on the geometric deformation characteristics of the jet electric field model.

[0067] The electrode voltage may be the voltage value corresponding to the cathode and the anode. The boundary geometric deformation speed. The geometric deformation characteristics may be the change characteristics of the geometric deformation of the boundaries of the two electrodes under the current distribution.

[0068] Continue to refer Figure 2In step S220, model parameters and model boundary conditions are defined. For example, model parameters may include bore bottom radius, bore top radius, electrolyte conductivity, cell voltage, deformation seed layer thickness, molar mass of dissolving species, density of dissolving species, number of electrons per dissolving species, and threshold current density for dissolution.

[0069] Due to the high-speed flow of electrolyte, turbulent mixing occurs. Assuming that the electrolyte conductivity is constant (such as 7s / m), the activation potential of the electrode reaction can be ignored, so the electrolytic cell can be simulated by a primary current distribution. Specifically, the anode workpiece corresponds to the anode, the cathode tool corresponds to the cathode, the cathode is grounded, the electrode voltage of the anode is set to 20V, and the two electrodes use the same equilibrium potential.

[0070] Under the above electrode voltage, the boundary geometric deformation speed generated by the anode-electrode reaction in the normal direction is determined, and the boundary geometric deformation speed is calculated based on multiple processing parameters. Then, the model boundary conditions are determined based on the geometric deformation characteristics of the jet electric field model. For example, the model boundary conditions are set as follows: the movement of all boundaries except the anode in the normal direction is zero, and the two electrode boundaries are not deformed. Through the above steps, the relevant parameters associated with the model can be defined, and simulation calculations will be performed based on the model boundary conditions in the future to obtain the influence of different processing parameters on the quality of electro-hydraulic beam hole making.

[0071] In an exemplary embodiment of the present disclosure, determining the boundary geometric deformation rate in the normal direction of the electrode reaction of the anode workpiece includes: determining the local current density of the electrode reaction; obtaining electrode reaction parameters associated with the electrode reaction, the electrode reaction parameters including the stoichiometric coefficient, molar mass, density of dissolved substances, number of electrons in the dissolution reaction, and Faraday constant; determining the boundary geometric deformation rate based on the local current density and the electrode reaction parameters.

[0072] The local current density refers to the amount of current flowing through a conductor (such as an electrolyte) in a specific area within the model domain. The electrode reaction parameter may be a processing parameter related to the electrode reaction.

[0073] Based on the above electrode voltage configuration, the boundary geometric deformation velocity v generated by the anode-electrode reaction in the normal direction is determined according to the current distribution. n (m / s), boundary geometry deformation velocity v n It is determined based on the local current density of the electrode reaction and related parameters of the electrode reaction, as shown in Formula 1.

[0074]

[0075] Where M (kg / mol) is the molar mass; ρ (kg / m 3 ) is the density of dissolved metal; n is the number of electrons involved in the dissolution reaction; F (C / mol) is the Faraday constant; i loc (A / m 2 ) is the local current density of the electrode reaction, v eff is the effective stoichiometric coefficient of the metal in the anode-electrode reaction.

[0076] Through the above steps, the model parameters associated with the outlet flow electric field model can be defined, so as to subsequently analyze the influence of the above model parameters on the quality of the hole making process.

[0077] In an exemplary embodiment of the present disclosure, determining the local current density of an electrode reaction includes: obtaining the current distribution corresponding to the electrode reaction, determining the boundary normal and the electrolyte current density vector corresponding to the current distribution; and determining the local current density based on the boundary normal and the electrolyte current density vector.

[0078] Among them, the current distribution can refer to the distribution of current on various parts of the cathode surface under the ideal condition that there is no polarization in the electrode reaction process. The boundary normal can be the normal corresponding to the boundary of the modeling domain. The current density vector can be a physical quantity that describes the strength and flow direction of the current at a certain point in the circuit.

[0079] For the primary current distribution, the boundary normal and electrolyte current density vector corresponding to the current distribution can be determined, and then the local current density i can be calculated based on the above two physical quantities. loc , as shown in Formula 2.

[0080] i loc =i l ·n (Formula 2)

[0081] Among them, i l (A / m 2 ) is the electrolyte current density vector, and n is the boundary normal. Through the above steps, the distribution of local current density in the primary current distribution can be calculated.

[0082] In addition, according to relevant experimental results, veff It is defined as shown in Formula 3.

[0083] v eff =1 i l n≥10A / cm 2

[0084] v eff =0 i l n<10A / cm 2 (Formula 3)

[0085] Among them, v eff is the effective stoichiometric coefficient of the metal in the anode-electrode reaction, i l (A / m 2 ) is the electrolyte current density vector and n is the boundary normal.

[0086] In an exemplary embodiment of the present disclosure, a jet electric field model is simulated and calculated based on model parameters and model boundary conditions to obtain hole geometries at different times, including: determining a simulation time interval for simulating the jet electric field model, and selecting a simulation time point based on the simulation time interval; under the model boundary conditions, determining the model state of the jet electric field model at different simulation time points to obtain a simulation result graph; the simulation result graph includes an electrolyte potential graph, an electrolyte current density graph, and a hole shape graph; the hole geometry is obtained based on the hole shape graph, and the model parameters to be adjusted are determined according to the hole geometry.

[0087] The simulation time interval may be a time interval corresponding to the simulation calculation. The simulation time point may be a time point determined from the simulation time interval. The model state may be a related state of various physical quantities corresponding to the jet electric field model at different simulation time points. The simulation result graph may be a result graph of various physical quantities of the jet electric field model under the primary current distribution.

[0088] Continue to refer Figure 2 , in step S230, solve the model. Perform a transient simulation study on the electrochemical machining of the air film hole to obtain a simulation result diagram. After constructing the jet electric field model and defining the model parameters and model boundary conditions, perform a 1s transient simulation study on the electrochemical machining of the hole to obtain a simulation result diagram of the model. Specifically, first determine the simulation time interval for simulating the jet electric field model. For example, the simulation time interval can be 1 second. Select the interpolation method in the time selection to obtain multiple simulation time points. Then, under the model boundary conditions, determine the model state of the jet electric field model at different simulation time points to obtain simulation result diagrams, including electrolyte potential diagrams, electrolyte current density diagrams, and hole shape diagrams.

[0089] refer to Figure 4 , Figure 4An electrolyte potential diagram of a fluidic electric field model according to an exemplary embodiment of the present disclosure is schematically shown. Figure 4 Yes Figure 3 The potential change of the electrolyte in the jet electric field model constructed in the paper is analyzed and the potential diagram is drawn. In the process of drawing the potential diagram, the following processing steps need to be performed, such as selecting the potential reference point; numbering and measuring points; drawing points and connecting lines; calculating the voltage and analyzing the potential change.

[0090] refer to Figure 5 , Figure 5 The electrolyte current density diagram of the jet electric field model according to an exemplary embodiment of the present disclosure is schematically shown. The electrolyte current density diagram can be used to describe the current intensity and flow direction of the electrolyte in the primary current distribution. Since the jet electric field model adopts a two-dimensional axisymmetric method, Figure 5 A partial current density diagram of the current distribution is shown in FIG. Figure 4 and Figure 5 It can be seen that during the simulation calculation process, the electrolyte potential distribution and electrolyte current density state of the jet electric field model remain basically consistent.

[0091] refer to Figure 6 , Figure 6 A diagram schematically illustrates a hole geometry diagram of a hole making process according to an exemplary embodiment of the present disclosure. Figure 6 The workpiece contours at the simulation time points t = 0, t = 0.5s and t = 1.0s are shown in FIG. 1 , respectively. The hole geometry at different simulation time points can be determined based on the workpiece contours. Figure 6 It can be seen that most of the material removal occurs in the area closest to the cathode tool, showing a clear trend away from the upper left corner. There is also a less obvious local maximum material removal to the right, which is affected by the insulating layer. Through the above steps, the influence of different model parameters on the quality of the hole making process can be analyzed according to the hole shape diagram, which helps to adjust the relevant model parameters according to the simulation results and optimize the process quality.

[0092] In summary, the electric field simulation method of electrochemical jet machining disclosed in the present invention constructs a modeling domain of a geometric model of an air film hole making process, and the modeling domain is generated based on the jet field of the electrolyte; determines the model features of the geometric model, and constructs a jet electric field model based on the modeling domain and the model features; determines the model parameters and model boundary conditions corresponding to the jet electric field model; based on the model parameters and the model boundary conditions, the jet electric field model is simulated and calculated to obtain the hole geometry at different times, and the hole geometry is used to reflect the correlation between the model parameters and the hole making process quality. On the one hand, by constructing a jet electric field model, the electrolyte electric field information is collected in real time and simulated, which is conducive to obtaining the influence of different processing parameters on the quality of electro-hydraulic beam hole making, thereby providing a valuable reference for the optimization of the electro-hydraulic beam hole making process. On the other hand, by establishing a jet electric field model, the model parameters can be changed and calculated conveniently and quickly, which is suitable for simulation research in various situations. On the other hand, according to the hole shape diagram obtained by simulation calculation, the model parameters to be adjusted that affect the process can be analyzed, thereby optimizing the hole making process.

[0093] It should be noted that, although the steps of the method of the present invention are described in a specific order in the drawings, this does not require or imply that the steps must be performed in this specific order, or that all the steps shown must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps, etc.

[0094] In addition, in this exemplary embodiment, an electric field simulation device for electrochemical jet machining is also provided. Figure 7 The electric field simulation device 700 for electrochemical jet machining may include: a modeling domain construction module 710 , a model construction module 720 , a parameter condition determination module 730 and a simulation calculation module 740 .

[0095] Specifically, the modeling domain construction module 710 is used to construct the modeling domain of the geometric model of the air film hole making process, and the modeling domain is generated based on the jet field of the electrolyte; the model construction module 720 is used to determine the model characteristics of the geometric model, and construct the jet electric field model based on the modeling domain and the model characteristics; the parameter condition determination module 730 is used to determine the model parameters and model boundary conditions corresponding to the jet electric field model; the simulation calculation module 740 is used to simulate and calculate the jet electric field model based on the model parameters and the model boundary conditions to obtain the hole geometry at different times, and the hole geometry is used to reflect the correlation between the model parameters and the hole making process quality.

[0096] In an exemplary embodiment of the present disclosure, the model construction module 720 includes a model construction unit, which is used to: determine the model symmetry mode of the geometric model according to the model characteristics; determine the physical field configuration information corresponding to the geometric model; construct an initial jet electric field model according to the modeling domain, the model symmetry mode and the physical field configuration information; perform geometric deformation processing on the initial jet electric field model to obtain a jet electric field model.

[0097] In an exemplary embodiment of the present disclosure, the model building unit includes a model building sub-unit, which is used to: apply a preconfigured potential difference between the anode workpiece and the cathode tool of the air film hole making process; determine the initial geometric shape of the jet electric field model based on the potential difference; introduce a rectangular seed deformation into the initial geometric shape to obtain the jet electric field model.

[0098] In an exemplary embodiment of the present disclosure, the model parameters include a boundary geometric deformation velocity, and the parameter condition determination module 730 includes a parameter condition determination unit, which is used to: configure corresponding electrode voltages for the anode workpiece and the cathode tool respectively, and the anode and the cathode have the same equilibrium potential; under the electrode voltage, determine the boundary geometric deformation velocity generated by the electrode reaction of the anode workpiece in the normal direction; and determine the model boundary conditions based on the geometric deformation characteristics of the jet electric field model.

[0099] In an exemplary embodiment of the present disclosure, the parameter condition determination unit includes a deformation speed determination unit, which is used to: determine the local current density of the electrode reaction; obtain electrode reaction parameters associated with the electrode reaction, the electrode reaction parameters including stoichiometric coefficient, molar mass, dissolved substance density, number of electrons in the dissolution reaction, and Faraday constant; determine the boundary geometry deformation speed based on the local current density and the electrode reaction parameters.

[0100] In an exemplary embodiment of the present disclosure, the deformation speed determination unit includes a current density determination subunit, which is used to: obtain the current distribution corresponding to the electrode reaction, determine the boundary normal and electrolyte current density vector corresponding to the current distribution; and determine the local current density based on the boundary normal and the electrolyte current density vector.

[0101] In an exemplary embodiment of the present disclosure, the simulation calculation module 740 includes a simulation calculation unit, which is used to: determine a simulation time interval for simulating the jet electric field model, and select a simulation time point based on the simulation time interval; under model boundary conditions, determine the model state of the jet electric field model at different simulation time points to obtain a simulation result graph; the simulation result graph includes an electrolyte potential graph, an electrolyte current density graph, and a pore shape graph; obtain the pore geometry based on the pore shape graph, and determine the model parameters to be adjusted according to the pore geometry.

[0102] The specific details of the virtual modules of the above-mentioned electric field simulation devices for electrochemical jet machining have been described in detail in the corresponding electric field simulation methods for electrochemical jet machining, and thus will not be repeated here.

[0103] It should be noted that, although several modules or units of the electric field simulation device for electrochemical jet machining are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiments of the present disclosure, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided into multiple modules or units to be embodied.

[0104] In addition, in an exemplary embodiment of the present disclosure, an electronic device capable of implementing the above method is also provided.

[0105] It will be appreciated by those skilled in the art that various aspects of the present invention may be implemented as systems, methods or program products. Therefore, various aspects of the present invention may be specifically implemented in the following forms, namely: complete hardware embodiments, complete software embodiments (including firmware, microcode, etc.), or embodiments combining hardware and software aspects, which may be collectively referred to herein as "circuits", "modules" or "systems".

[0106] Reference below Figure 8 800 according to this embodiment of the present disclosure is described. Figure 8 The electronic device 800 shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present disclosure.

[0107] like Figure 8 As shown, the electronic device 800 is in the form of a general computing device. The components of the electronic device 800 may include, but are not limited to: the at least one processing unit 810, the at least one storage unit 820, a bus 830 connecting different system components (including the storage unit 820 and the processing unit 810), and a display unit 840.

[0108] The storage unit stores program codes, which can be executed by the processing unit 810, so that the processing unit 810 executes the steps according to various exemplary embodiments of the present disclosure described in the above “Exemplary Method” section of this specification.

[0109] The storage unit 820 may include a readable medium in the form of a volatile storage unit, such as a random access memory unit (RAM) 821 and / or a cache memory unit 822 , and may further include a read-only memory unit (ROM) 823 .

[0110] The storage unit 820 may include a program / utility 824 having a set (at least one) of program modules 825, such program modules 825 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0111] Bus 830 may represent one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0112] The electronic device 800 may also communicate with one or more external devices 870 (e.g., keyboards, pointing devices, Bluetooth devices, etc.), may also communicate with one or more devices that enable a user to interact with the electronic device 800, and / or communicate with any device that enables the electronic device 800 to communicate with one or more other computing devices (e.g., routers, modems, etc.). Such communication may be performed via an input / output (I / O) interface 850. Furthermore, the electronic device 800 may also communicate with one or more networks (e.g., local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) via a network adapter 860. As shown, the network adapter 860 communicates with other modules of the electronic device 800 via a bus 830. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the electronic device 800, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, etc.

[0113] Through the description of the above embodiments, it is easy for those skilled in the art to understand that the example embodiments described here can be implemented by software, or by software combined with necessary hardware. Therefore, the technical solution according to the embodiment of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the embodiment of the present disclosure.

[0114] In an exemplary embodiment of the present disclosure, a computer-readable storage medium is also provided, on which a program product capable of implementing the above method of the present specification is stored. In some possible embodiments, various aspects of the present invention can also be implemented in the form of a program product, which includes a program code, and when the program product is run on a terminal device, the program code is used to enable the terminal device to perform the steps according to various exemplary embodiments of the present invention described in the above "Exemplary Method" section of the present specification.

[0115] refer to Fig. 9 As shown, a program product 900 for implementing the above method according to an embodiment of the present invention is described, which can adopt a portable compact disk read-only memory (CD-ROM) and include program code, and can be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited thereto. In this document, a readable storage medium can be any tangible medium containing or storing a program, which can be used by or in combination with an instruction execution system, an apparatus or a device.

[0116] The program product may use any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0117] Computer readable signal media may include data signals propagated in baseband or as part of a carrier wave, in which readable program code is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Readable signal media may also be any readable medium other than a readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0118] The program code embodied on the readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination of the foregoing.

[0119] Program code for performing the operations of the present invention may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving a remote computing device, the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., through the Internet using an Internet service provider).

[0120] In addition, the above-mentioned figures are only schematic illustrations of the processes included in the method according to an exemplary embodiment of the present invention, and are not intended to be limiting. It is easy to understand that the processes shown in the above-mentioned figures do not indicate or limit the time sequence of these processes. In addition, it is also easy to understand that these processes can be performed synchronously or asynchronously, for example, in multiple modules.

[0121] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are to be considered as exemplary only, and the true scope and spirit of the present disclosure are indicated by the claims.

[0122] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An electric field simulation method for electrochemical jet machining, characterized in that: include: Constructing a modeling domain of a geometric model of an air film hole making process, wherein the modeling domain is generated based on a jet field of an electrolyte; Determining model features of the geometric model, and constructing a jet electric field model based on the modeling domain and the model features; Determining model parameters and model boundary conditions corresponding to the jet electric field model; Based on the model parameters and the model boundary conditions, the jet electric field model is simulated and calculated to obtain the hole geometry at different times, and the hole geometry is used to reflect the correlation between the model parameters and the hole making process quality.

2. The method according to claim 1, characterized in that The constructing of the jet electric field model based on the modeling domain and the model characteristics comprises: Determining a model symmetry mode of the geometric model according to the model features; Determining physical field configuration information corresponding to the geometric model; Constructing an initial jet electric field model according to the modeling domain, the model symmetry mode and the physical field configuration information; The initial jet electric field model is subjected to geometric deformation processing to obtain the jet electric field model.

3. The method according to claim 2, characterized in that The step of performing geometric deformation processing on the initial jet electric field model to obtain the jet electric field model comprises: applying a preconfigured potential difference between an anode workpiece and a cathode tool of the air film hole making process; Based on the potential difference, determining an initial geometric shape of the jet electric field model; A rectangular seed deformation is introduced into the initial geometric shape to obtain the jet electric field model.

4. The method according to claim 1, characterized in that: The model parameters include boundary geometry deformation speed, and the determination of the model parameters and model boundary conditions corresponding to the jet electric field model includes: The anode workpiece and the cathode tool are respectively configured with respective corresponding electrode voltages, and the anode and the cathode have the same equilibrium potential; Under the electrode voltage, determining the boundary geometric deformation velocity generated by the electrode reaction of the anode workpiece in the normal direction; The model boundary conditions are determined according to the geometric deformation characteristics of the jet electric field model.

5. The method according to claim 4, characterized in that The step of determining the boundary geometric deformation velocity generated by the electrode reaction of the anode workpiece in the normal direction comprises: determining a local current density of the electrode reaction; Acquiring electrode reaction parameters associated with the electrode reaction, wherein the electrode reaction parameters include stoichiometric coefficient, molar mass, dissolved substance density, number of electrons in the dissolution reaction, and Faraday constant; The boundary geometric deformation speed is determined according to the local current density and the electrode reaction parameter.

6. The method according to claim 5, characterized in that Determining the local current density of the electrode reaction includes: Obtaining a current distribution corresponding to the electrode reaction, and determining a boundary normal and an electrolyte current density vector corresponding to the current distribution; The local current density is determined according to the boundary normal and the electrolyte current density vector.

7. The method according to claim 1, characterized in that The method of performing simulation calculation on the jet electric field model based on the model parameters and the model boundary conditions to obtain the hole geometry at different times includes: Determine a simulation time interval for performing simulation calculation on the jet electric field model, and select a simulation time point based on the simulation time interval; Under the model boundary conditions, determining the model state of the jet electric field model at different simulation time points, and obtaining a simulation result diagram; the simulation result diagram includes an electrolyte potential diagram, an electrolyte current density diagram, and a pore shape diagram; The hole geometry is acquired based on the hole shape map, and the model parameters to be adjusted are determined according to the hole geometry.

8. An electric field simulation device for electrochemical jet machining, characterized in that: include: A modeling domain construction module is used to construct a modeling domain of a geometric model of an air film hole making process, wherein the modeling domain is generated based on a jet field of an electrolyte; A model building module, used for determining the model features of the geometric model, and building a jet electric field model based on the modeling domain and the model features; A parameter condition determination module, used to determine the model parameters and model boundary conditions corresponding to the jet electric field model; The simulation calculation module is used to perform simulation calculation on the jet electric field model based on the model parameters and the model boundary conditions to obtain the hole geometry at different times, and the hole geometry is used to reflect the correlation between the model parameters and the hole making process quality.

9. An electronic device, characterized in that: include: processor; as well as A memory having computer-readable instructions stored thereon, wherein the computer-readable instructions, when executed by the processor, implement the electric field simulation method for electrochemical jet machining according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the electric field simulation method for electrochemical jet machining according to any one of claims 1 to 7 is implemented.

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