CN114741939A - Metal diaphragm tightening method and equipment based on temperature control stress - Google Patents
Metal diaphragm tightening method and equipment based on temperature control stress Download PDFInfo
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- CN114741939A CN114741939A CN202210664798.4A CN202210664798A CN114741939A CN 114741939 A CN114741939 A CN 114741939A CN 202210664798 A CN202210664798 A CN 202210664798A CN 114741939 A CN114741939 A CN 114741939A
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Abstract
The invention discloses a metal diaphragm tightening method and equipment based on temperature control stress, wherein the method comprises the following steps: constructing a first shell-solid part model of the metal diaphragm and the upper and lower pressure rings; dividing a shell unit grid of the metal diaphragm and solid unit grids of the upper compression ring and the lower compression ring, and applying the property and the thermodynamic parameter of the material to the corresponding unit grids; setting displacement loading boundary conditions, contact limiting conditions and initial temperature field parameters, and setting a temperature-displacement coupling type analysis step to obtain stress distribution of the diaphragm after being cooled to room temperature and support reaction force information of the pressure ring; copying a second shell-entity grid model, modifying initial temperature field parameters for multiple times, setting a temperature-displacement coupling type analysis step, and summarizing to obtain a relation curve of stress of the metal diaphragm cooled to room temperature along with the initial temperature; the tightening stress of the metal diaphragm can be accurately controlled, the tightening states of the metal diaphragms with different processing requirements are achieved, and a foundation is laid for subsequent welding and cutting of the metal diaphragm and the base.
Description
Technical Field
The invention belongs to the technical field of fastening equipment, and particularly relates to a metal diaphragm tightening method and equipment based on temperature control stress.
Background
Pressure sensors are instruments used for detecting the performance and parameters of equipment and products in the modern industrial production process, and are widely applied to the industrial fields of aviation, aerospace, electronics and the like at present. The metal diaphragm is an important component of the pressure sensor, and can convert a pressure signal into an electric signal and output the electric signal to a terminal to achieve the purpose of detection.
The metal diaphragm is generally made of square or round metal thin film materials, certain stress needs to be kept on the metal diaphragm arranged on the pressure sensor, namely, the diaphragm is in a tightened state, and the stress cannot be loosened in a long-term service process, so that the metal diaphragm can be welded on the base after being tightened in a preparation process. At present, a mechanical loading displacement mode is mostly adopted in a method for tightening a metal membrane, but the volume of membrane tightening equipment is often large, and the manufacturing cost is increased. Therefore, the method and the device for tightening the metal diaphragm based on the temperature control stress can automatically and accurately control the tightening stress of the diaphragm at different temperatures, meet different requirements of the diaphragm tension, greatly reduce the manufacturing cost and the labor cost of the device and improve the production efficiency.
Disclosure of Invention
Aiming at the defects or improvement requirements of the prior art, the invention provides a temperature control stress-based metal diaphragm tightening method and equipment, which can realize the rapid modeling of metal diaphragms with different compression ring support reaction forces and upper and lower compression ring structures under different initial temperature conditions, obtain the tension information of the metal diaphragms under different initial temperature conditions, accurately control the tightening stress of the diaphragms, achieve the tightening states of the diaphragms with different processing requirements, and lay a foundation for the subsequent welding and cutting processing of the diaphragms and a base.
To achieve the above object, according to an aspect of the present invention, there is provided a method for tightening a metal diaphragm based on temperature-controlled stress, including:
s100, constructing a first shell-solid part model of the metal diaphragm and the upper and lower pressure rings according to the sizes of the original metal diaphragm and the parts of the upper and lower pressure rings;
s200, dividing a shell unit grid of the metal diaphragm and an entity unit grid of the upper compression ring and the lower compression ring on the first shell-entity component model, and applying the attribute and thermodynamic parameters of the material to the corresponding unit grid to obtain a second shell-entity grid model;
s300, setting displacement loading boundary conditions, contact limiting conditions and initial temperature field parameters for the second shell-solid grid model, and setting a temperature-displacement coupling type analysis step to obtain stress distribution and support reaction force information of the pressure ring after the metal diaphragm is cooled to room temperature;
s400, copying a second shell-entity grid model, modifying initial temperature field parameters for multiple times, and setting a temperature-displacement coupling type analysis step to obtain a relation curve of stress and initial temperature after the metal diaphragm is cooled to room temperature.
Further, in S200, dividing a shell unit mesh of the metal diaphragm and a solid unit mesh of the upper and lower compression rings on the first shell-solid component model includes: the shell unit grid is divided by adopting a four-node thermal coupling curved surface thin shell reduction integral unit, and the solid unit grid is divided by adopting an eight-node thermal coupling hexahedral unit.
Further, the properties and thermodynamic parameters of the material in S200 include: density, modulus of elasticity, poisson's ratio, yield stress, plastic strain, conductivity, coefficient of expansion, and specific heat, the use of these parameters being temperature dependent.
Further, the thickness of the metal membrane is 101-102And in the micron scale, the metal membrane is made of nickel-based alloy or iron-based alloy.
Further, the upper and lower compression rings are made of nickel-based alloy or iron-based alloy, and kovar alloy with a low expansion coefficient can be selected preferably.
Further, the temperature range of the initial temperature field parameter of the multiple modifications in S400 is 40 ℃ to 600 ℃.
Further, the step of setting the temperature-displacement coupling type analysis in S300 includes: integrating the temperature by adopting a backward difference format, and solving a nonlinear equation of the temperature-displacement coupling model by adopting a Newton method.
According to a second aspect of the present invention, there is provided a temperature controlled stress based metallic diaphragm tensioner apparatus comprising: the first main module is used for constructing a first shell-solid part model of the metal diaphragm and the upper and lower pressure rings according to the sizes of the original metal diaphragm and the parts of the upper and lower pressure rings; the second main module is used for dividing the shell unit grids of the metal membrane and the entity unit grids of the upper compression ring and the lower compression ring on the first shell-entity component model, and applying the material attribute and thermodynamic parameters to the corresponding unit grids to obtain a second shell-entity grid model; the third main module is used for setting displacement loading boundary conditions, contact limiting conditions and initial temperature field parameters for the second shell-entity grid model, and setting a temperature-displacement coupling type analysis step to obtain stress distribution and support reaction force information of the pressure ring after the metal membrane is cooled to room temperature; and the fourth main module is used for copying the second shell-entity grid model, modifying the initial temperature field parameters for multiple times, setting a temperature-displacement coupling type analysis step, and summarizing to obtain a relation curve of stress of the metal diaphragm cooled to room temperature along with the initial temperature.
According to a third aspect of the present invention, there is provided an electronic apparatus comprising: at least one central processing unit; and at least one memory communicatively coupled to the central processor, wherein: the memory stores program instructions executable by the central processing unit, which invokes the program instructions to perform the method.
According to a fourth aspect of the invention, there is provided a non-transitory computer readable storage medium storing computer instructions for causing a computer to perform the method.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
1. the invention relates to a metal diaphragm tightening method based on temperature control stress, which comprises the steps of obtaining a second shell-solid grid model by constructing a first shell-solid part model of a metal diaphragm and upper and lower press rings and loading unit grids and parameters, setting a temperature-displacement coupling type analysis step according to set displacement loading boundary conditions, contact limiting conditions and initial temperature field parameters, obtaining stress distribution, press ring support reaction force, stress relation curves of the upper and lower press ring structures and the like after the diaphragm is cooled to room temperature, realizing rapid modeling of the metal diaphragm and the upper and lower press ring structures with different press ring support reaction forces under different initial temperature conditions, obtaining tension information of the metal diaphragm under different initial temperature conditions, accurately controlling the tightening stress of the diaphragm, achieving the tightening state of the diaphragm with different processing requirements, and performing subsequent welding, welding and the diaphragm and a base, And a foundation is laid for cutting processing.
Drawings
FIG. 1 is a flow chart of a method for tightening a metal diaphragm based on temperature-controlled stress according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a temperature-controlled stress-based metal diaphragm tensioning device according to an embodiment of the present invention;
fig. 3 is a schematic physical structure diagram of an electronic device according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a part model of a metal diaphragm and an upper and lower pressure ring structure according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a mesh model of a metal membrane and an upper and lower pressure ring structure according to an embodiment of the present invention;
FIG. 6 is a stress distribution diagram of a temperature-controlled stress-based stretching finite element model of a metal diaphragm and upper and lower pressure ring structures according to an embodiment of the present invention;
fig. 7 is a graph showing the relationship between the stress of the diaphragm and the initial temperature after the metal diaphragm and the upper and lower pressure ring structures are cooled to room temperature according to the embodiment of the present invention.
In all the figures, the same reference numerals denote the same features, in particular: 1-upper press ring, 2-metal diaphragm and 3-lower press ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the present invention provides a method for tightening a metal diaphragm based on temperature-controlled stress, comprising:
s100, constructing a first shell-solid part model of the metal diaphragm and the upper and lower pressure rings according to the sizes of the original metal diaphragm and the parts of the upper and lower pressure rings;
s200, dividing a shell unit grid of the metal diaphragm and an entity unit grid of the upper compression ring and the lower compression ring on the first shell-entity component model, and applying the attribute and thermodynamic parameters of the material to the corresponding unit grid to obtain a second shell-entity grid model;
specifically, the properties and thermodynamic parameters of the material include: density, modulus of elasticity, poisson's ratio, yield stress, plastic strain, conductivity, coefficient of expansion, and specific heat, and the like, and the use of these parameters is temperature dependent.
Specifically, dividing the metal diaphragm shell unit grid and the upper and lower pressure ring entity unit grid on the first shell-entity component model includes: the solid unit grid is divided by adopting eight-node thermally coupled hexahedral units, and the shell unit grid is divided by adopting four-node thermally coupled curved surface thin shell reduction integral units.
S300, setting displacement loading boundary conditions, contact limiting conditions and initial temperature field parameters for the second shell-solid grid model, and setting a temperature-displacement coupling type analysis step to obtain stress distribution and supporting reaction force information of the pressure ring after the metal diaphragm is cooled to room temperature;
specifically, the boundary condition is a position constraint condition, and the clamping condition is simulated by constraining 6 degrees of freedom of the lower compression ring 3; the upper compression ring 1 is lowered for a certain displacement through displacement control, and finally the metal diaphragm is fixed between the upper compression ring and the lower compression ring, so that the pre-compression state of the diaphragm is realized; the step of setting a temperature-displacement coupling type analysis includes: integrating the temperature by adopting a backward difference format, and solving a nonlinear equation of the temperature-displacement coupling model by adopting a Newton method.
S400, copying a second shell-entity grid model, modifying initial temperature field parameters for multiple times, setting a temperature-displacement coupling type analysis step, and summarizing to obtain a relation curve of stress of the metal diaphragm cooled to room temperature along with the initial temperature.
Specifically, the initial temperature of the metal diaphragm and the upper and lower pressure ring structures is taken from 40 ℃ to 600 ℃ according to the initial temperature field parameters, and the temperature range is within the control range of lower expansion coefficients of the upper and lower pressure rings.
Preferably, the thickness of the metal membrane is 101-102The metal diaphragm is made of nickel-based alloy or iron-based alloy in micron order; the upper compression ring and the lower compression ring are made of nickel-based alloy or iron-based alloy, and kovar alloy with a low expansion coefficient can be preferably selected.
The following description will explain the operation steps of the embodiment of the method by specific cases as follows:
fig. 4 shows a schematic diagram of a displacement control process of descending the upper pressure ring for a certain distance, and a simulation example of pre-compression and tightening of a shell-entity coupling unit model with a structure formed by a metal membrane with a diameter of 80mm and a thickness of 20 μm and upper and lower pressure rings with an outer diameter of 100mm and an inner diameter of 64mm is adopted to explain in detail a complete process of the present invention (displacement control is shown in the arrow direction in fig. 4), and fig. 4 includes an upper pressure ring 1, a metal membrane 2 and a lower pressure ring 3. The metal diaphragm 2 and the component model of the upper and lower pressure ring structure shown in fig. 4 were constructed in the aforementioned dimensions. On the basis of the component model, a metal diaphragm shell unit grid and upper and lower compression ring entity unit grids are divided, the attribute and thermodynamic parameters of the material are applied to the corresponding unit grids, a shell-entity coupling unit grid model of the metal diaphragm 2 and upper and lower compression ring structures is established, and the grid model is shown in figure 5, wherein the upper and lower compression rings are three-dimensional entity unit grids, and the metal diaphragm 2 is a two-dimensional shell unit grid. On the basis of the grid model, setting displacement loading boundary conditions, contact limiting conditions and initial temperature field parameters (80 ℃), setting a temperature-displacement coupling type analysis step, integrating the temperature by adopting a backward difference format, solving a nonlinear equation by adopting a Newton method, and calculating to obtain stress distribution of the metal diaphragm 2 after being cooled to room temperature and support reaction force information of the pressure ring, wherein the stress distribution of the metal diaphragm 2 after being cooled to the room temperature is shown in figure 6, the stress of the metal diaphragm 2 at the moment is 222MPa, and the support reaction force borne by the pressure ring is 26kN (or 2.6 t); copying a second shell-entity grid model, modifying initial temperature field parameters (40-600 ℃) for multiple times, setting a temperature-displacement coupling type analysis step, summarizing to obtain a relation curve of stress of the metal membrane 2 cooled to room temperature along with the initial temperature, wherein the relation curve is shown in FIG. 7, and the result shows that when the initial temperature of the metal membrane 2 is 40-160 ℃, the stress of the metal membrane 2 cooled to room temperature is 74-521 MPa, in the whole heating and cooling process, the stress of the metal membrane does not exceed the yield strength of the material, the metal membrane meets service conditions in an elastic deformation stage, and subsequent welding and cutting processing can be carried out; when the initial temperature of the metal membrane 2 exceeds 200 ℃, the stress of the metal membrane 2 after being cooled to room temperature is reduced along with the increase of the initial temperature, the main reason is that the stress of the metal membrane 2 is large, and the metal membrane 2 slides between the upper pressure ring and the lower pressure ring in the cooling shrinkage process; when the initial temperature of the metal membrane 2 is 200 ℃, the metal membrane 2 contracts by 0.08mm along the radial direction after being cooled to the room temperature; when the initial temperature of the metal diaphragm 2 is 600 ℃, the metal diaphragm 2 contracts by 0.6mm in the radial direction after being cooled to the room temperature.
The implementation basis of the various embodiments of the present invention is realized by performing programmed processing by a device having a central processing unit function. Therefore, in engineering practice, the technical solutions and functions thereof of the embodiments of the present invention can be packaged into various modules. Based on this practical situation, on the basis of the above embodiments, embodiments of the present invention provide a temperature-controlled stress-based metal diaphragm tensioning device apparatus, which is used for executing the temperature-controlled stress-based metal diaphragm tensioning method in the above method embodiments. As shown in fig. 2, includes:
the first main module is used for constructing a first shell-solid part model of the metal diaphragm and the upper and lower pressure rings according to the sizes of the original metal diaphragm and the parts of the upper and lower pressure rings;
the second main module is used for dividing the shell unit grids of the metal membrane and the entity unit grids of the upper compression ring and the lower compression ring on the first shell-entity component model, and applying the material attribute and thermodynamic parameters to the corresponding unit grids to obtain a second shell-entity grid model;
the third main module is used for setting displacement loading boundary conditions, contact limiting conditions and initial temperature field parameters for the second shell-entity grid model, and setting a temperature-displacement coupling type analysis step to obtain stress distribution and support reaction force information of the pressure ring after the metal membrane is cooled to room temperature;
and the fourth main module is used for copying the second shell-solid grid model, modifying the initial temperature field parameters for multiple times, setting a temperature-displacement coupling type analysis step, and summarizing to obtain a relation curve of the stress of the metal diaphragm cooled to room temperature along with the initial temperature.
The metal diaphragm tensioning device equipment based on temperature control stress provided by the embodiment of the invention adopts a plurality of modules in figure 2, obtains a second shell-solid model by constructing a first shell-solid part model of a metal diaphragm and upper and lower pressure rings and loading unit grids and parameters, obtains stress distribution of the metal diaphragm after being cooled to room temperature and support reaction force information of the pressure rings according to the second shell-solid model, copies the second shell-solid grid model, modifies initial temperature field parameters, solves a nonlinear equation of a temperature-displacement coupling model again to obtain a relation curve of stress of the metal diaphragm after being cooled to room temperature along with initial temperature, can realize rapid modeling of the metal diaphragm and upper and lower pressure ring structures with different support reaction forces of the pressure rings under different initial temperature conditions, and obtains tension information of the metal diaphragm under different initial temperature conditions, the tightening stress of the metal diaphragm is accurately controlled, the tightening states of the metal diaphragms with different processing requirements are achieved, and a foundation is laid for subsequent welding and cutting processing of the metal diaphragm and the base.
It should be noted that, the apparatus in the apparatus embodiment provided by the present invention may be used for implementing methods in other method embodiments provided by the present invention, except that corresponding function modules are provided, and the principle of the apparatus embodiment provided by the present invention is basically the same as that of the apparatus embodiment provided by the present invention, so long as a person skilled in the art obtains corresponding technical means by combining technical features on the basis of the apparatus embodiment described above, and obtains a technical solution formed by these technical means, on the premise of ensuring that the technical solution has practicability, the apparatus in the apparatus embodiment described above may be modified, so as to obtain a corresponding apparatus class embodiment, which is used for implementing methods in other method class embodiments. For example:
based on the content of the above device embodiment, as an optional embodiment, the temperature-controlled stress-based metal diaphragm tensioning device provided in the embodiment of the present invention further includes: the first submodule is used for realizing that the shell unit grids of the metal diaphragm and the entity unit grids of the upper and lower pressure rings are divided on the first shell-entity component model, and comprises: the solid unit grid is divided by adopting eight-node thermally coupled hexahedral units, and the shell unit grid is divided by adopting four-node thermally coupled curved surface thin shell reduction integral units.
A second submodule for implementing properties and thermodynamic parameters of said material, comprising: density, modulus of elasticity, poisson's ratio, yield stress, plastic strain, conductivity, coefficient of expansion, and specific heat, among others, and the use of these parameters is temperature dependent.
A third submodule for realizing that the thickness of the metal diaphragm is 101-102Micron meterIn the magnitude, the metal diaphragm is made of nickel-based alloy or iron-based alloy; the upper compression ring and the lower compression ring are made of nickel-based alloy or iron-based alloy, and kovar alloy with a low expansion coefficient can be preferably selected.
And the fourth submodule is used for realizing the value taking of the initial temperature of the metal diaphragm and the upper and lower pressure ring structures from 40 ℃ to 600 ℃ of the initial temperature field parameter, and the temperature range is within the control range of the lower expansion coefficient of the upper and lower pressure rings.
The method of the embodiment of the invention is realized by depending on the electronic equipment, so that the related electronic equipment is necessarily introduced. To this end, an embodiment of the present invention provides an electronic apparatus, as shown in fig. 3, including: the system comprises at least one Central processor (Central processor), a communication Interface (communication Interface), at least one Memory (Memory) and a communication bus, wherein the at least one Central processor, the communication Interface and the at least one Memory are communicated with each other through the communication bus. The at least one central processor may invoke logic instructions in the at least one memory to perform all or a portion of the steps of the methods provided by the various method embodiments described above.
In addition, the logic instructions in the at least one memory may be implemented in software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the method embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and various media capable of storing program codes.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. Based on the understanding, the above technical solutions substantially or otherwise contributing to the prior art may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the various embodiments or some parts of the embodiments.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. Based on this recognition, each block in the flowchart or block diagrams may represent a module, a program segment, or a portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In this patent, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It will be understood by those skilled in the art that the foregoing is only an exemplary embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, since various modifications, substitutions and improvements within the spirit and scope of the invention are possible and within the scope of the appended claims.
Claims (10)
1. A metal diaphragm tightening method based on temperature control stress is characterized by comprising the following steps:
s100, constructing a first shell-solid part model of the metal diaphragm and the upper and lower pressure rings according to the sizes of the original metal diaphragm and the parts of the upper and lower pressure rings;
s200, dividing a shell unit grid of the metal diaphragm and an entity unit grid of the upper and lower compression rings on the first shell-entity component model, and applying the attribute and the thermodynamic parameter of the material to the corresponding unit grid to obtain a second shell-entity grid model;
s300, setting displacement loading boundary conditions, contact limiting conditions and initial temperature field parameters for the second shell-solid grid model, and setting a temperature-displacement coupling type analysis step to obtain stress distribution and supporting reaction force information of the pressure ring after the metal diaphragm is cooled to room temperature;
s400, copying a second shell-entity grid model, modifying initial temperature field parameters for multiple times, and setting a temperature-displacement coupling type analysis step to obtain a relation curve of stress and initial temperature after the metal diaphragm is cooled to room temperature.
2. The temperature-controlled stress-based metal diaphragm tightening method according to claim 1, wherein dividing a shell unit mesh of the metal diaphragm and a solid unit mesh of upper and lower compression rings on the first shell-solid component model in S200 comprises: the shell unit grid is divided by adopting a four-node thermal coupling curved surface thin shell reduction integral unit, and the solid unit grid is divided by adopting an eight-node thermal coupling hexahedral unit.
3. The method for tightening a temperature-controlled stress-based metal membrane according to claim 2, wherein the properties and thermodynamic parameters of the material in S200 include: density, modulus of elasticity, poisson's ratio, yield stress, plastic strain, conductivity, coefficient of expansion, and specific heat, the use of these parameters being temperature dependent.
4. The method for temperature controlled stress based tensioning of a metallic diaphragm according to any of claims 1 to 3, wherein the thickness of the metallic diaphragm is 101-102And in the micron scale, the metal membrane is made of nickel-based alloy or iron-based alloy.
5. The temperature-controlled stress-based metal membrane tensioning method according to claim 4, wherein the upper and lower compression rings are made of a nickel-based alloy or an iron-based alloy, and preferably a kovar alloy with a low expansion coefficient is selected.
6. The temperature-controlled stress-based metal diaphragm tensioning method according to claim 5, wherein the temperature range of the initial temperature field parameter of the plurality of modifications in S400 is 40 ℃ to 600 ℃.
7. The method for tightening a metal diaphragm based on temperature-controlled stress according to claim 6, wherein the step of analyzing the type of the temperature-displacement coupling set in S300 comprises: integrating the temperature by adopting a backward difference format, and solving a nonlinear equation of the temperature-displacement coupling model by adopting a Newton method.
8. A metal diaphragm tightener device based on temperature-controlled stress, comprising: the first main module is used for constructing a first shell-solid part model of the metal diaphragm and the upper and lower pressure rings according to the sizes of the original metal diaphragm and the parts of the upper and lower pressure rings; the second main module is used for dividing the shell unit grids of the metal membrane and the entity unit grids of the upper compression ring and the lower compression ring on the first shell-entity component model, and applying the material attribute and thermodynamic parameters to the corresponding unit grids to obtain a second shell-entity grid model; the third main module is used for setting displacement loading boundary conditions, contact limiting conditions and initial temperature field parameters for the second shell-entity grid model, and setting a temperature-displacement coupling type analysis step to obtain stress distribution and support reaction force information of the pressure ring after the metal membrane is cooled to room temperature; and the fourth main module is used for copying the second shell-solid grid model, modifying the initial temperature field parameters for multiple times, setting a temperature-displacement coupling type analysis step, and summarizing to obtain a relation curve of the stress of the metal diaphragm cooled to room temperature along with the initial temperature.
9. An electronic device, comprising: at least one central processor; and at least one memory communicatively coupled to the central processor, wherein: the memory stores program instructions executable by a central processing unit, the central processing unit invoking the program instructions and being capable of performing the method of any one of claims 1-7.
10. A non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the method of any one of claims 1-7.
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| CN112380752A (en) * | 2020-11-23 | 2021-02-19 | 南京理工大学 | Method for improving welding process of metal sheet by predicting welding heat treatment value of metal sheet |
| CN113821963A (en) * | 2021-11-24 | 2021-12-21 | 武汉光谷航天三江激光产业技术研究院有限公司 | Compression buckling test method and equipment for laser welding wallboard structure |
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