Weld checking method, storage medium, system, device and apparatus

Abstract

The present application relates to the technical field of welding, and particularly relates to a welding seam checking method, a storage medium, a system, a device and equipment. The welding seam checking method comprises the following steps: obtaining element size, element load and welding seam size experience value of a to-be-welded element; building a finite element model of the to-be-welded element according to the element size; determining welding seam load according to the finite element model and the element load; calculating welding seam stress according to the welding seam load, the welding seam size experience value and the element size; and checking the welding seam size experience value according to the welding seam stress, so that the welding seam size meeting the welding seam strength requirement can be accurately determined, the welding workload and production cost are reduced, and the production efficiency and use safety of the structural member are improved.

Description

Technical Field

[0001] This invention relates to the field of welding technology, specifically to a weld verification method, a computer-readable storage medium, a weld verification system, a weld verification device, and a weld verification equipment. Background Technology

[0002] Vacuum containers are commonly used in highly pure environments or extreme conditions. During the manufacture of vacuum containers, the welding process affects their strength and sealing performance. To ensure that the vacuum container does not buckle and become unstable, thus preventing structural damage, the structural dimensions of the welds must meet stress strength requirements.

[0003] In related technologies, the size of welds is often determined based on empirical formulas. However, in order to ensure the safety of structural components, the weld size is often too large, which increases the welding workload and welding costs, and also reduces production efficiency. At the same time, excessively large weld sizes often lead to excessive welding heat input, which in turn increases the probability of welding deformation and reduces the safety performance of structural components, and may pose certain safety hazards in practical applications. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the first objective of this invention is to provide a weld verification method that can accurately determine the weld size that meets the weld strength requirements, reduce welding workload and production costs, and simultaneously improve the production efficiency and safety of structural components.

[0005] A second objective of this invention is to provide a computer-readable storage medium.

[0006] The third objective of this invention is to provide a weld inspection system.

[0007] The fourth objective of this invention is to provide a weld inspection device.

[0008] The fifth objective of this invention is to provide a weld seam inspection device.

[0009] The weld verification method according to an embodiment of the present invention includes: obtaining the component dimensions, component load, and empirical values ​​of weld dimensions of the component to be welded; constructing a finite element model of the component to be welded based on the component dimensions; determining the weld load based on the finite element model and component load; calculating the weld stress based on the weld load, empirical values ​​of weld dimensions, and component dimensions; and verifying the empirical values ​​of weld dimensions based on the weld stress.

[0010] According to the weld inspection method of the present invention, the weld stress includes a first stress and a second stress, wherein the first stress is a membrane stress and the second stress is the sum of the membrane stress and the bending stress.

[0011] According to the weld verification method of the present invention, the weld stress is calculated based on the weld load, empirical values ​​of weld size, and component size, including: calculating the normal stress perpendicular to the effective cross section of the weld, the shear stress parallel to the effective cross section of the weld, the shear stress parallel to the weld length direction, the sum of the normal stress perpendicular to the effective cross section of the weld and the bending stress, the sum of the shear stress parallel to the effective cross section of the weld and the bending stress, and the sum of the shear stress parallel to the weld length direction, based on the weld load, empirical values ​​of weld size, and component size; determining a first stress based on the normal stress perpendicular to the effective cross section of the weld, the shear stress parallel to the effective cross section of the weld, and the shear stress parallel to the weld length direction; and determining a second stress based on the sum of the normal stress perpendicular to the effective cross section of the weld and the bending stress, the sum of the shear stress parallel to the effective cross section of the weld and the bending stress, and the sum of the shear stress parallel to the weld length direction.

[0012] According to the weld verification method of the present invention, the weld size empirical value is verified based on the weld stress, including: when the first stress is less than or equal to the first preset stress and the second stress is less than or equal to the second preset stress, the weld size empirical value is determined to pass the verification; when the first stress is greater than the first preset stress or the second stress is greater than the second preset stress, the weld size empirical value is determined to fail the verification, wherein the first preset stress is less than the second preset stress.

[0013] According to the weld verification method of the present invention, the first preset stress and the second preset stress are both determined based on the allowable stress of the component to be welded at the design temperature and the weld joint coefficient.

[0014] According to the weld verification method of the present invention, when it is determined that the empirical value of weld size has failed the verification, the method further includes: adjusting the empirical value of weld size; recalculating the weld stress using the adjusted empirical value of weld size, weld load and component size, until the adjusted empirical value of weld size is determined to have passed the verification based on the recalculated weld stress.

[0015] According to the weld verification method of the present invention, the weld load is determined based on the finite element model and component load, including: extracting the nodal forces on the effective section of the weld based on the finite element model and component load; and calculating the integral of the nodal forces on the effective section of the weld to determine the weld load.

[0016] According to the weld verification method of the present invention, the component to be welded includes a first component and a second component. The method further includes: after the finite element model of the component to be welded is built, the finite element model of the first component and the finite element model of the second component are connected by binding contact to simulate the welding of the first component and the second component.

[0017] According to the weld inspection method of the present invention, the weld dimensions include weld leg size, weld height, weld length, weld bevel and weld throat size.

[0018] According to the weld inspection method of the present invention, the type of weld is a T-type fillet weld.

[0019] According to the weld verification method of the present invention, a finite element model of the welded component is built, the nodal force of the weld is obtained based on the finite element model, and the corresponding weld stress is calculated based on the nodal force. The weld stress is further judged to verify whether the weld meets the standard size. This method achieves accurate verification of the weld, can accurately determine the weld size that meets the weld strength requirements, reduce welding workload and production costs, and improve the production efficiency and safety of structural components.

[0020] Secondly, embodiments of the present invention provide a computer-readable storage medium storing a weld verification program, which, when executed by a processor, can implement the above-described weld verification method.

[0021] Thirdly, embodiments of the present invention provide a weld verification system, which enables the above-described weld verification method when the processor executes a weld verification program stored in the memory.

[0022] Fourthly, embodiments of the present invention provide a weld verification device, the device comprising: an acquisition module for acquiring the component dimensions, component load, and empirical values ​​of weld dimensions of the component to be welded; a construction module for constructing a finite element model of the component to be welded based on the component dimensions; a determination module for determining the weld load based on the finite element model and the component load; a calculation module for calculating the weld stress based on the weld load, empirical values ​​of weld dimensions, and component dimensions; and a verification module for verifying the empirical values ​​of weld dimensions based on the weld stress.

[0023] Fifthly, embodiments of the present invention provide a weld inspection device, including the weld inspection apparatus described above.

[0024] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] Figure 1 A flowchart of the weld inspection method provided in the embodiments of the present invention;

[0026] Figure 2 This is a side view of the welding element structure provided in an embodiment of the present invention;

[0027] Figure 3A flowchart for determining weld load based on finite element model and component load provided in an embodiment of the present invention;

[0028] Figure 4 This is a front view of the welding element structure provided in an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the weld inspection system provided in an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the weld inspection device provided in an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of the weld seam inspection equipment provided in an embodiment of the present invention.

[0032] Reference numerals: 510-Processor; 520-Memory; 530-Input / Output Interface; 540-Communication Interface; 550-Bus; 600-Weld Check Device; 610-Acquisition Module; 620-Construction Module; 630-Determination Module; 640-Calculation Module; 650-Check Module; 700-Weld Check Equipment. Detailed Implementation

[0033] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0034] The weld inspection method of the present invention is described below with reference to the accompanying drawings.

[0035] refer to Figure 1 This is a flowchart of the weld inspection method provided in an embodiment of the present invention.

[0036] Step S101: Obtain empirical values ​​for the component dimensions, component load, and weld dimensions of the component to be welded.

[0037] Specifically, in actual design and production, designers need to obtain the component dimensions of the corresponding welding components according to various design standards, further determine the parts where the welding components need to be welded, and determine the empirical value of the weld size according to empirical formulas. In this invention, it is also necessary to determine the component load according to the application conditions of the corresponding welding components in the actual environment. The component load may include the mechanical load, thermal load, etc. of the component.

[0038] Weld dimensions are core parameters in welding process design and quality control, directly affecting the strength, durability, and reliability of the joint. Weld dimensions include weld leg size, weld height, weld length, weld bevel, and weld throat size. The weld leg size is the length of the right-angled side of the largest isosceles right triangle drawn in the cross-section of the fillet weld; the weld height is the height of the weld metal extending beyond the component surface in a butt weld; the weld length is the specific welding length of the fillet weld; the weld bevel is a groove of a specific geometric shape machined and assembled from the parts to be welded to ensure weldability; and the weld throat size is the distance between two parallel lines parallel to the weld toe connection line in the cross-section of the fillet weld.

[0039] Step S102: Build a finite element model of the component to be welded based on the component size.

[0040] Specifically, the finite element model is a numerical tool used in engineering analysis to simulate the mechanical behavior of complex structures. In the field of welding, it can predict the stress distribution, deformation, fatigue life, etc. of welded components.

[0041] The finite element model can perform preprocessing operations on the component dimensions of the input welding components. It is necessary to simplify the geometric model generated based on the component dimensions in order to generate the corresponding finite element model of the welding components.

[0042] The preprocessing operations may include: assigning different material parameters to the welding components and weld areas; dividing the weld-connected components that need to be checked into a grid to ensure that the grid density matches the weld and avoids excessive differences between the weld and the grid size; and setting contact modes for the surfaces or nodes of the weld area.

[0043] refer to Figure 2 This is a side view of the welding element provided in an embodiment of the present invention.

[0044] As an optional embodiment, the weld verification method described in this embodiment of the invention is preferably applied to a T-type fillet weld, wherein the two elements constituting the T-type fillet weld are a first element and a second element, respectively.

[0045] As an optional embodiment, the components to be welded include a first component and a second component. After the finite element model of the components to be welded is built, the finite element model of the first component and the finite element model of the second component are connected by a binding contact to simulate the welding of the first component and the second component.

[0046] Specifically, before setting the contact mode for the surface or node of the weld area, the welding components that need to be checked are modeled separately, that is, the first component and the second component are modeled separately. Furthermore, the models of the first component and the second component are connected by binding contact to simulate the welding of the welding components.

[0047] It should be noted that bonded contact is a type of contact used to completely fix two contact surfaces together so that the nodes or elements between the contact surfaces do not undergo relative displacement or separation during simulation analysis, thereby ensuring the accuracy of experimental data. Bonded contact can be implemented using finite element analysis software such as ANSYS Workbench (simulation integration platform), and other finite element software can also be used to implement bonded contact of welded components.

[0048] Step S103: Determine the weld load based on the finite element model and component load.

[0049] Specifically, component loads are applied to the finite element model of the welded component, and the weld load at the weld is further calculated using the finite element model. In other words, the component loads under actual environmental application conditions can be simulated using finite element analysis software and applied to the corresponding component for simulation.

[0050] refer to Figure 3 This is a flowchart for determining weld load based on finite element model and component load, provided in an embodiment of the present invention.

[0051] Step S301: Extract the nodal forces on the effective section of the weld based on the finite element model and component loads.

[0052] Step S302: Calculate the integral of the nodal force over the effective section of the weld to determine the weld load.

[0053] Specifically, refer to Figure 4 Point P can represent the force-bearing point of the element input load in the finite element model. Translating point P yields point O, through which the weld load is further calculated. Specifically, the nodal forces on the effective section of the weld can be extracted. The effective section refers to the portion of the weld that directly bears the load; for example, in a fillet weld, the effective section typically refers to the throat region of the weld. Further, the integral of the extracted nodal forces on the effective section is calculated, converting the discrete nodal forces into a continuous load distribution, thus obtaining the total load of the entire weld section, i.e., the weld load.

[0054] It should be noted that in step S102, all components of the welded structure as a whole can be imported into the finite element model, that is, not just two connected elements, so that when the element load is applied to the finite element model in step S103, the weld load of multiple welds can be obtained in one calculation, which effectively reduces the number of calculations of the finite element model and improves the calculation efficiency.

[0055] Step S104: Calculate the weld stress based on the weld load, empirical values ​​of weld size, and component size.

[0056] Specifically, weld stress includes a first stress and a second stress. The first stress is the membrane stress, and the second stress is the sum of the membrane stress and the bending stress. The membrane stress is a normal stress component that is uniformly distributed along the thickness direction of the structural cross-section and is generally affected by axial forces such as tension or compression of the structure. The bending stress is a normal stress component that is linearly distributed along the thickness direction of the cross-section and is generally affected by bending stress generated by bending moments, etc.

[0057] refer to Figure 4 More specifically, the load extracted from the endpoint P of the second element in the direction away from the first element is (F) X F Y F Z M X M Y M Z In this equation, F represents the force exerted on the node in different directions, M represents the torque exerted on the node in different directions, and X, Y, and Z are directions, where X is perpendicular to the effective cross section of the weld, Y is parallel to the effective cross section of the weld and perpendicular to the weld length, and Z is parallel to the weld length.

[0058] Furthermore, to calculate the membrane stress of the weld, it is necessary to translate the endpoint P to obtain the load (F) at node O. X F Y F Z M X +eF Y M Y -eF X M Z Furthermore, based on the load at node O, the first stress at node O is calculated using the following formula:

[0059]

[0060] in, The normal stress is perpendicular to the effective cross-section of the weld. This refers to the shear stress parallel to the effective cross-section of the weld. denoted as shear stress parallel to the weld length direction; e is the distance between the endpoint P of the second element and node O; a is the weld throat dimension; L is the weld length; w is the weld height; and t is the thickness of the second element.

[0061] Furthermore, based on the normal stress perpendicular to the effective section of the weld... Shear stress parallel to the effective cross section of the weld and shear stress parallel to the weld length direction Determine the first stress σ m First stress σ m The calculation formula is:

[0062]

[0063] Furthermore, based on the load at node O, the second stress at node O is calculated using the following formula:

[0064]

[0065] in, It is the sum of the normal stress and bending stress perpendicular to the effective cross section of the weld; It is the sum of the shear stress and bending stress parallel to the effective cross section of the weld; The sum of shear stress and bending stress parallel to the weld length direction is given. For the explanation of other symbols, please refer to the explanation of each symbol in the first stress calculation formula above, which will not be repeated here.

[0066] Furthermore, based on the sum of the normal stress and bending stress perpendicular to the effective section of the weld... The sum of shear stress and bending stress parallel to the effective cross section of the weld. and the sum of shear stress and bending stress parallel to the weld length direction. Determine the second stress σ m+b Second stress σ m+b The calculation formula is:

[0067]

[0068] Step S105: Verify the empirical value of the weld size based on the weld stress.

[0069] Specifically, after calculating the weld stress, it is necessary to further compare the weld stress with the preset stress to determine whether the weld strength corresponding to the empirical value of the weld size meets the design requirements.

[0070] As an optional embodiment, the empirical value of weld size is checked based on weld stress, including: when the first stress is less than or equal to the first preset stress and the second stress is less than or equal to the second preset stress, the empirical value of weld size is determined to pass the check; when the first stress is greater than the first preset stress or the second stress is greater than the second preset stress, the empirical value of weld size is determined to fail the check, wherein the first preset stress is less than the second preset stress.

[0071] Specifically, in practical applications of welded structures, in addition to the membrane stress generated by axial force, the welded structure is also subjected to bending moment, resulting in bending stress at the weld. Therefore, membrane stress and bending stress generally exist simultaneously. When membrane stress and bending stress are superimposed on the weld, the weld is placed in a complex stress state. Therefore, when analyzing weld stress, it is necessary to consider the changes in membrane stress and bending stress simultaneously to avoid damage to the weld due to stress exceeding its bearing capacity during actual use.

[0072] The first and second preset stresses are both determined based on the allowable stress of the component to be welded at the design temperature and the weld joint coefficient. The calculation formulas for the first and second preset stresses are as follows:

[0073] σ1=ES a

[0074] σ²=E1.5S a

[0075] Where σ1 is the first preset stress; σ2 is the second preset stress; E is the joint coefficient, and welds of different shapes have different joint coefficients; S a This represents the allowable stress of the material at the design temperature. It should be noted that the joint factor for fillet welds is 0.5, and the joint factor for incomplete penetration fillet welds is 0.75.

[0076] Since the first preset stress is the first stress, which is the stress of the effective section of the weld, and the second preset stress is the second stress, which is the sum of the stress of the effective section of the weld and the bending stress, the first preset stress is less than the second preset stress.

[0077] Furthermore, the following expanded formula for verification can be obtained:

[0078]

[0079] When the first stress is not greater than the first preset stress and the second stress is not greater than the second preset stress, it indicates that the membrane stress and bending stress of the weld meet the design requirements. It can be further determined that the empirical value of the weld size meets the design requirements at this time, and the verification is passed.

[0080] When the first stress is greater than the first preset stress or the second stress is greater than the second preset stress, it indicates that either the membrane stress or the bending stress of the weld does not meet the design requirements. Furthermore, it can be determined that the empirical value of the weld size does not meet the design requirements and fails the verification.

[0081] As an optional embodiment, when it is determined that the empirical value of the weld size has failed the verification, the method further includes: adjusting the empirical value of the weld size; recalculating the weld stress using the adjusted empirical value of the weld size, the weld load, and the component size, until the adjusted empirical value of the weld size is determined to have passed the verification based on the recalculated weld stress.

[0082] Specifically, when the empirical value of the weld size fails the verification, it is necessary to further adjust the empirical value of the weld size. This can be done by adjusting one or more parameters of the weld size, such as the weld leg size, weld height, weld length, weld bevel, and weld throat size. Then, based on the adjusted empirical value of the weld size, the weld stress is recalculated in combination with the weld load and component size until the recalculated weld stress meets the judgment criteria when compared with the preset stress. At this point, the empirical value of the weld size is considered to have passed the verification.

[0083] Optionally, the weld inspection method provided by the present invention can be further described in detail with reference to the following embodiments.

[0084] Example 1:

[0085] The weld provided in this embodiment is a T-type fillet weld, including a first element and a second element. The dimensions of the second element are: weld length L = 2490 mm, weld throat size a = 22.6 mm, thickness t = 300 mm, and the distance from the endpoint P of the second element to node O is...

[0086] The distance between them is e = 250 mm. The materials of the first and second elements are 304 stainless steel, the allowable stress is Sa = 138 MPa, and the fillet weld joint coefficient is E = 0.5.

[0087] A finite element model of the T-shaped fillet weld is constructed based on the component dimensions. Then, the weld load is determined based on the finite element model and the component load. Finally, the load (F) at the endpoint P of the second component is extracted. X ,F Y ,F Z M X M Y M Z (-2.33e5, 3.76e6, 1.54e5, -9.85e7, -4.76e6, -1.86e8) where the unit of force is N and the unit of torque is N·m.

[0088] Furthermore, the weld stress is calculated based on the weld load, empirical values ​​of weld dimensions, and component dimensions, where the normal stress perpendicular to the effective cross-section of the weld is... Shear stress along the effective cross section of the weld Shear stress parallel to the weld length direction The sum of normal stress and bending stress at the effective cross section of the joint. The sum of shear stress and bending stress parallel to the effective cross section of the weld. The sum of shear stress and bending stress parallel to the weld length direction

[0089] Furthermore, by comparing the weld stress with the preset stress, the empirical values ​​of the weld dimensions are checked to see if they meet the design requirements: the first stress and the first preset stress are calculated: σ m =58.33≤ES a =0.5*138=69MH stress is less than the first preset stress; calculate the second stress and the second preset stress: σ m+b =66.62MPa≤E1.5S a =103.5MPa, which shows that the second stress is less than the second preset stress. Therefore, the empirical value of the weld size at this time has been verified and meets the actual requirements.

[0090] As can be seen from the above, the weld verification method provided by the present invention establishes a finite element model of the welded component, obtains the nodal force of the weld based on the finite element model, calculates the corresponding weld stress based on the nodal force, and further judges whether the weld stress meets the standard to verify whether the weld strength corresponding to the weld size meets the requirements. This achieves accurate verification of the weld and effectively ensures the safety of the welded structure.

[0091] Based on the same inventive concept, corresponding to the weld inspection method of any of the above embodiments, this application also provides a computer-readable storage medium that stores computer instructions for causing a computer to execute the weld inspection method of any of the above embodiments.

[0092] The aforementioned non-transitory computer-readable storage media can be any available medium or data storage device that a computer can access, including but not limited to magnetic storage (e.g., floppy disks, hard disks, magnetic tapes, magneto-optical disks (MOs), etc.), optical storage (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor storage (e.g., ROMs, EPROMs, EEPROMs, non-volatile memory (NAND flash), solid-state drives (SSDs)).

[0093] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, computer-readable media can even be paper or other suitable media on which programs can be printed, because programs can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0094] The computer instructions stored in the computer-readable storage medium of the above embodiments are used to cause a computer to execute the weld verification method of any of the above exemplary method sections. The weld verification method builds a finite element model of the welded component, obtains the nodal force of the weld based on the finite element model, calculates the corresponding weld stress based on the nodal force, and further determines whether the weld stress meets the standard to verify whether the weld meets the standard size. This achieves accurate verification of the weld and effectively ensures the safety of the welded structure.

[0095] Based on the same concept, corresponding to the weld verification method provided in any of the above embodiments, this application also provides a weld verification system, including a processor and a memory, wherein the memory stores a program or instructions that can run on the processor, and when the program or instructions are executed by the processor, the steps of the weld verification method as in the first aspect are implemented.

[0096] Figure 5 The diagram illustrates a more specific weld inspection system provided in this embodiment. The system may include a processor 510, a memory 520, an input / output interface 530, a communication interface 540, and a bus 550. The processor 510, memory 520, input / output interface 530, and communication interface 540 are interconnected internally via the bus 550.

[0097] The processor 510 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0098] The memory 520 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 520 can store the operating system and other applications. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program code is stored in the memory 520 and is called and executed by the processor 510.

[0099] Input / output interface 530 is used to connect input / output modules to realize information input and output. Input / output modules can be configured as components in the device (not shown in the figure) or externally connected to the device to provide corresponding functions. Input devices may include keyboards, mice, touch screens, microphones, various sensors, etc., and output devices may include displays, speakers, vibrators, indicator lights, etc.

[0100] The communication interface 540 is used to connect a communication module (not shown in the figure) to enable communication between this device and other devices. The communication module can communicate via wired means (e.g., USB, Ethernet cable) or wireless means (e.g., mobile network, Wi-Fi, Bluetooth).

[0101] Bus 550 includes a pathway for transmitting information between various components of the device, such as processor 510, memory 520, input / output interface 530, and communication interface 540.

[0102] It should be noted that although the above-described device only shows the processor 510, memory 520, input / output interface 530, communication interface 540, and bus 550, in specific implementations, the device may also include other components necessary for normal operation. Furthermore, those skilled in the art will understand that the above-described device may only include the components necessary for implementing the embodiments of this specification, and not necessarily all the components shown in the figures.

[0103] The weld verification system described above is used to implement the corresponding weld verification method in any of the foregoing embodiments, and has the beneficial effects of the corresponding weld verification method embodiments, which will not be repeated here.

[0104] refer to Figure 6 This is a schematic diagram of the weld inspection device provided in an embodiment of the present invention.

[0105] Based on the same concept, corresponding to the weld verification method provided in any of the above embodiments, this application also provides a weld verification device 600.

[0106] The weld verification device 600 includes: an acquisition module 610, a construction module 620, a determination module 630, a calculation module 640, and a verification module 650.

[0107] Specifically, the acquisition module 610 is used to acquire the component dimensions, component load, and empirical values ​​of weld dimensions of the component to be welded; the construction module 620 is used to construct the finite element model of the component to be welded based on the component dimensions; the determination module 630 is used to determine the weld load based on the finite element model and component load; the calculation module 640 is used to calculate the weld stress based on the weld load, empirical values ​​of weld dimensions, and component dimensions; and the verification module 650 is used to verify the empirical values ​​of weld dimensions based on the weld stress.

[0108] In some embodiments of the present invention, the weld stress includes a first stress and a second stress, wherein the first stress is a membrane stress and the second stress is the sum of the membrane stress and the bending stress.

[0109] In some embodiments of the present invention, the calculation module 640 is further configured to: calculate the normal stress perpendicular to the effective cross section of the weld, the shear stress parallel to the effective cross section of the weld, the shear stress parallel to the weld length direction, the sum of the normal stress perpendicular to the effective cross section of the weld and the bending stress, the sum of the shear stress parallel to the effective cross section of the weld and the bending stress, and the sum of the shear stress parallel to the weld length direction, based on the weld load, empirical values ​​of weld size, and component size; determine a first stress based on the normal stress perpendicular to the effective cross section of the weld, the shear stress parallel to the effective cross section of the weld, and the shear stress parallel to the weld length direction; and determine a second stress based on the sum of the normal stress perpendicular to the effective cross section of the weld and the bending stress, the sum of the shear stress parallel to the effective cross section of the weld and the bending stress, and the sum of the shear stress parallel to the weld length direction.

[0110] In some embodiments of the present invention, the verification module 650 is further configured to: determine that the empirical value of the weld size passes the verification when the first stress is less than or equal to the first preset stress and the second stress is less than or equal to the second preset stress; and determine that the empirical value of the weld size fails the verification when the first stress is greater than the first preset stress or the second stress is greater than the second preset stress, wherein the first preset stress is less than the second preset stress.

[0111] In some embodiments of the present invention, the first preset stress and the second preset stress are both determined based on the allowable stress of the component to be welded at the design temperature and the welding joint coefficient.

[0112] In some embodiments of the present invention, the verification module 650 is further configured to: adjust the weld size empirical value when it is determined that the weld size empirical value has failed the verification; recalculate the weld stress using the adjusted weld size empirical value, weld load and component size, until the adjusted weld size empirical value is determined to have passed the verification based on the recalculated weld stress.

[0113] In some embodiments of the present invention, the determining module 630 is further configured to: extract nodal forces on the effective section of the weld based on the finite element model and component loads; calculate the integral of the nodal forces on the effective section of the weld to determine the weld load.

[0114] In some embodiments of the present invention, the component to be welded includes a first component and a second component. The assembly module 620 is further configured to: after the finite element model of the component to be welded is assembled, establish a connection between the finite element model of the first component and the finite element model of the second component through a binding contact, so as to simulate the welding of the first component and the second component.

[0115] In some embodiments of the present invention, the weld dimensions include weld leg dimensions, weld height, weld length, weld bevel, and weld throat dimensions.

[0116] In some embodiments of the present invention, the weld type is a T-type fillet weld.

[0117] It should be noted that the specific implementation of the weld verification device 600 in this embodiment of the invention can be found in the specific implementation of the weld verification method in the above embodiments. To avoid redundancy, it will not be described again here.

[0118] In summary, the weld verification device provided in this embodiment of the invention establishes a finite element model of the welded component, obtains the nodal force of the weld based on the finite element model, calculates the corresponding weld stress based on the nodal force, and further determines whether the weld stress meets the standard to verify whether the weld strength corresponding to the weld size meets the requirements. This achieves accurate verification of the weld and effectively ensures the safety of the welded structure.

[0119] refer to Figure 7 This is a schematic diagram of the weld inspection equipment provided in an embodiment of the present invention.

[0120] Based on the same inventive concept, corresponding to the weld verification method of any of the above embodiments, this application also proposes a weld verification device 700, which includes the weld verification apparatus 600 in the above embodiments and has the beneficial effects of the corresponding weld verification method embodiments, which will not be repeated here.

[0121] Furthermore, the other components and functions of the weld inspection equipment in the embodiments of the present invention are known to those skilled in the art, and will not be described in detail here to reduce redundancy.

[0122] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0123] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0124] Furthermore, the terms "first," "second," etc., used in the embodiments of this invention are for descriptive purposes only and should not be construed as indicating or implying relative importance, or implicitly specifying the number of technical features indicated in this embodiment. Therefore, features defined with terms such as "first" and "second" in the embodiments of this invention can explicitly or implicitly indicate that the embodiment includes at least one of those features. In the description of this invention, the word "multiple" means at least two or more, such as two, three, four, etc., unless otherwise explicitly specified in the embodiments.

[0125] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for checking weld seams, characterized in that, The method includes: Obtain empirical values ​​for the component dimensions, component load, and weld dimensions of the component to be welded; A finite element model of the component to be welded is constructed based on the component dimensions. The weld load is determined based on the finite element model and the component load. The weld stress is calculated based on the weld load, the empirical value of the weld size, and the component size. The weld stress includes a first stress and a second stress. The first stress is the membrane stress, and the second stress is the sum of the membrane stress and the bending stress, including: Calculate the normal stress perpendicular to the effective section of the weld, the shear stress parallel to the effective section of the weld, the shear stress parallel to the length direction of the weld, the sum of the normal stress and bending stress perpendicular to the effective section of the weld, the sum of the shear stress and bending stress parallel to the effective section of the weld, and the sum of the shear stress and bending stress parallel to the length direction of the weld based on the weld load, the empirical value of the weld size, and the component size. The first stress is determined based on the normal stress perpendicular to the effective cross section of the weld, the shear stress parallel to the effective cross section of the weld, and the shear stress parallel to the length direction of the weld. The second stress is determined based on the sum of the normal stress perpendicular to the effective cross section of the weld and the bending stress, the sum of the shear stress parallel to the effective cross section of the weld and the bending stress, and the sum of the shear stress parallel to the length direction of the weld and the bending stress. The empirical value of the weld size is checked based on the weld stress.

2. The weld inspection method according to claim 1, characterized in that, The empirical value of the weld size is checked based on the weld stress, including: When the first stress is less than or equal to the first preset stress and the second stress is less than or equal to the second preset stress, the empirical value of the weld size is determined to have passed the verification. When the first stress is greater than the first preset stress, or the second stress is greater than the second preset stress, it is determined that the empirical value of the weld size has failed the verification, wherein the first preset stress is less than the second preset stress.

3. The weld inspection method according to claim 2, characterized in that, Both the first preset stress and the second preset stress are determined based on the allowable stress of the component to be welded at the design temperature and the welding joint coefficient.

4. The weld inspection method according to claim 2, characterized in that, When it is determined that the empirical value of the weld size has failed the verification, the method further includes: The empirical values ​​for the weld dimensions are adjusted. The weld stress is recalculated using the adjusted weld size empirical value, the weld load, and the component size until the adjusted weld size empirical value is verified based on the recalculated weld stress.

5. The weld inspection method according to claim 1, characterized in that, Determining the weld load based on the finite element model and the component load includes: Based on the finite element model and the component load, extract the nodal forces on the effective section of the weld; The integral of the nodal force over the effective cross section of the weld is calculated to determine the weld load.

6. The weld inspection method according to claim 1, characterized in that, The component to be welded includes a first component and a second component, and the method further includes: After the finite element model of the component to be welded is built, the finite element model of the first component and the finite element model of the second component are connected by binding contact to simulate the welding of the first component and the second component.

7. The weld inspection method according to claim 1, characterized in that, The weld dimensions include weld leg size, weld height, weld length, weld bevel, and weld throat size.

8. The weld inspection method according to claim 1, characterized in that, The weld type is a T-type fillet weld.

9. A computer-readable storage medium, characterized in that, It stores a weld verification program, which, when executed by the processor, implements the weld verification method according to any one of claims 1-8.

10. A weld inspection system, characterized in that, The system includes a memory and a processor, wherein when the processor executes a weld inspection program stored in the memory, it implements the weld inspection method according to any one of claims 1-8.

11. A weld seam inspection device, characterized in that, The device includes: The acquisition module is used to obtain empirical values ​​for the component dimensions, component load, and weld dimensions of the component to be welded; A construction module is used to construct a finite element model of the component to be welded based on the component dimensions; The determination module is used to determine the weld load based on the finite element model and the component load; The calculation module is used to calculate the weld stress based on the weld load, the empirical value of the weld size, and the component size. The weld stress includes a first stress and a second stress, wherein the first stress is a membrane stress, and the second stress is the sum of the membrane stress and the bending stress, including: Calculate the normal stress perpendicular to the effective section of the weld, the shear stress parallel to the effective section of the weld, the shear stress parallel to the length direction of the weld, the sum of the normal stress and bending stress perpendicular to the effective section of the weld, the sum of the shear stress and bending stress parallel to the effective section of the weld, and the sum of the shear stress and bending stress parallel to the length direction of the weld based on the weld load, the empirical value of the weld size, and the component size. The first stress is determined based on the normal stress perpendicular to the effective section of the weld, the shear stress parallel to the effective section of the weld, and the shear stress parallel to the length direction of the weld. The second stress is determined based on the sum of the normal stress perpendicular to the effective section of the weld and the bending stress, the sum of the shear stress parallel to the effective section of the weld and the bending stress, and the sum of the shear stress parallel to the length direction of the weld and the bending stress. The verification module is used to verify the empirical value of the weld size based on the weld stress.

12. A weld inspection device, characterized in that, Includes the weld inspection device as described in claim 11.

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