Welding seam checking method, system, device and equipment, and storage medium

Abstract

The invention relates to the technical field of welding, in particular to a welding seam checking method, system, device and equipment, and a storage medium. The welding seam checking method comprises the steps that the element size, the element load and the welding seam size empirical value of a to-be-welded element are obtained; building a finite element model of the to-be-welded element according to the element size; determining a weld load according to the finite element model and the element load; calculating the weld stress according to the weld load, the weld size empirical value and the element size; the welding seam size empirical value is checked 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 the production cost are reduced, and meanwhile, the production efficiency and the use safety of structural parts are improved.

Description

Technical Field

[0001] The present invention relates to the field of welding technology, and in particular to a weld calibration method, a computer-readable storage medium, a weld calibration system, a weld calibration device, and a weld calibration equipment. Background Art

[0002] Vacuum vessels are often used in highly purified environments or extreme conditions. During their manufacture, the welding process affects their strength and sealing. To prevent buckling and structural damage, the weld dimensions 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 parts, the weld size is often too large, which increases the welding workload and welding costs and reduces production efficiency. At the same time, an overly large weld size often leads to excessive welding heat input, which in turn increases the probability of welding deformation and reduces the safety performance of structural parts. There may be certain safety hazards in actual applications. Summary of the Invention

[0004] The present invention aims to at least partially address one of the technical problems in the related art. To this end, a first object of the present invention is to provide a weld verification method that accurately determines weld dimensions that meet weld strength requirements, thereby reducing welding workload and production costs while improving the production efficiency and safety of structural components.

[0005] A second object of the present invention is to provide a computer-readable storage medium.

[0006] The third object of the present invention is to provide a weld verification system.

[0007] A fourth object of the present invention is to provide a weld checking device.

[0008] A fifth object of the present invention is to provide a weld checking device.

[0009] According to an embodiment of the present invention, a weld verification method includes: obtaining the component size, component load and weld size empirical value of the component to be welded; building a finite element model of the component to be welded according to the component size; determining the weld load according to the finite element model and the component load; calculating the weld stress according to the weld load, the weld size empirical value and the component size; and verifying the weld size empirical value according to the weld stress.

[0010] According to the weld verification method of an embodiment 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 an embodiment of the present invention, the weld stress is calculated according to the weld load, the empirical value of the weld size and the 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 length direction of the weld, the sum of the normal stress and the bending stress perpendicular to the effective cross-section of the weld, the sum of the shear stress and the bending stress parallel to the effective cross-section of the weld, and the sum of the shear stress and the bending stress parallel to the length direction of the weld according to the weld load, the empirical value of the weld size and the component size; determining the first stress according to 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, and determining the second stress according to the sum of the normal stress and the bending stress perpendicular to the effective cross-section of the weld, the sum of the shear stress and the bending stress parallel to the effective cross-section of the weld, and the sum of the shear stress and the bending stress parallel to the length direction of the weld.

[0012] According to the weld verification method of an embodiment of the present invention, the weld size empirical value is verified according to 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, determining that the weld size empirical value has 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, determining that the weld size empirical value has failed the verification, wherein the first preset stress is less than the second preset stress.

[0013] According to the weld verification method of an embodiment 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 an embodiment of the present invention, when it is determined that the weld size empirical value has not passed the verification, the method further includes: adjusting the weld size empirical value; recalculating the weld stress based on the adjusted weld size empirical value, weld load and component size, until it is determined that the adjusted weld size empirical value has passed the verification based on the recalculated weld stress.

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

[0016] According to the weld verification method of an embodiment of the present invention, the elements to be welded include a first element and a second element. The method also includes: after the finite element model of the elements to be welded is completed, the finite element model of the first element and the finite element model of the second element are connected through binding contact to simulate the welding of the first element and the second element.

[0017] According to the weld verification method of an embodiment of the present invention, the weld dimensions include weld leg dimensions, weld height, weld length, weld groove, and weld throat dimensions.

[0018] According to the weld verification method of an embodiment of the present invention, the type of weld is a T-shaped fillet weld.

[0019] According to the weld verification method of an embodiment of the present invention, a finite element model of the welding component is constructed, and the nodal force of the weld is obtained based on the finite element model. The corresponding weld stress of the weld is calculated based on the nodal force, and whether the weld stress meets the standard is further judged to verify whether the weld meets the standard size. This 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 at the same time improve the production efficiency and safety of structural parts.

[0020] In a second aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a weld verification program is stored. When the weld verification program is executed by a processor, the above-mentioned weld verification method can be implemented.

[0021] In a third aspect, an embodiment of the present invention provides a weld calibration system, which can implement the above-mentioned weld calibration method when the processor executes the weld calibration program stored in the memory.

[0022] In a fourth aspect, an embodiment of the present invention provides a weld calibration device, which includes: an acquisition module for acquiring the component size, component load and weld size empirical value of the component to be welded; a construction module for constructing a finite element model of the component to be welded according to the component size; a determination module for determining the weld load according to the finite element model and the component load; a calculation module for calculating the weld stress according to the weld load, the weld size empirical value and the component size; and a calibration module for calibrating the weld size empirical value according to the weld stress.

[0023] In a fifth aspect, an embodiment of the present invention provides a weld calibration device, including the above-mentioned weld calibration device.

[0024] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A flow chart of a weld seam verification method provided in an embodiment of the present invention;

[0026] Figure 2 A schematic side view of a welding element structure provided by an embodiment of the present invention;

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

[0028] Figure 4 A front view schematic diagram of a welding element structure provided by an embodiment of the present invention;

[0029] Figure 5 A schematic structural diagram of a weld seam verification system provided by an embodiment of the present invention;

[0030] Figure 6 A schematic diagram of a weld seam checking device provided in an embodiment of the present invention;

[0031] Figure 7 A schematic diagram of a weld calibration device provided in an embodiment of the present invention.

[0032] Figure numerals: 510 -processor; 520 -memory; 530 -input / output interface; 540 -communication interface; 550 -bus; 600 -weld checking device; 610 -acquisition module; 620 -building module; 630 -determination module; 640 -calculation module; 650 -checking module; 700 -weld checking equipment. DETAILED DESCRIPTION

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

[0034] The weld seam checking method according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0035] refer to Figure 1 , which is a flow chart of the weld verification method provided in an embodiment of the present invention.

[0036] Step S101 , obtaining the component size, component load and weld size experience values ​​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 based on various design standards, further determine the locations of the welding components that require weld connections, and determine the empirical values ​​of the weld dimensions based on empirical formulas; in the present invention, it is also necessary to determine the component load based on 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 size is a core parameter in welding process design and quality control, directly affecting the strength, durability, and reliability of the joint. Weld size includes leg size, weld height, weld length, weld groove, and weld throat size. The 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 that extends beyond the component surface in a butt weld; the weld length is the specific weld length of the weld on the fillet weld; the weld groove is a groove of a certain geometric shape machined and assembled at the welded part 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: constructing a finite element model of the component to be welded according to 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 pre-processing operations on the component dimensions of the input welding components. It is necessary to simplify the geometric model generated according to the component dimensions to generate the corresponding finite element model of the welding components.

[0042] Among them, pre-processing operations may include: assigning different material parameters to welding elements and weld areas; dividing the mesh of weld-connected elements that need to be checked to ensure that the mesh density matches the weld and avoids excessive differences in weld and mesh size; contact settings, setting contact modes for faces or nodes in the weld area, etc.

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

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

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

[0046] Specifically, before setting the contact mode for the surface or node of the weld area, the welding elements that need to check the weld are modeled separately, that is, the first element and the second element are modeled separately. Further, the first element and the second element models are connected by binding contact to simulate the welding of the welding elements.

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

[0048] Step S103: determining the weld load according to the finite element model and the component load.

[0049] Specifically, a component load is 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. Specifically, the component load in the actual application conditions of the component can be simulated using finite element analysis software and applied to the corresponding component for simulation.

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

[0051] Step S301: extracting the nodal force on the effective section of the weld according to the finite element model and the component load.

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

[0053] Specifically, refer to Figure 4 Point P can represent the element load point of the finite element model input element load. Point P is translated to obtain point O, and the weld load is further calculated through point O. Specifically, the nodal forces on the effective cross-section of the weld can be extracted, where the effective cross-section refers to the portion of the weld that directly bears the load. For example, in a fillet weld, the effective cross-section usually refers to the throat area of ​​the weld. Furthermore, the extracted nodal forces are integrated over the effective cross-section to convert the discrete nodal forces into a continuous load distribution, thereby obtaining the total load of the entire weld cross-section, i.e., the weld load.

[0054] It should be noted that in step S102, all components in the entire welded structure 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 loads of multiple welds can be obtained by one calculation, which effectively reduces the number of calculations of the finite element model and improves the calculation efficiency.

[0055] Step S104 , calculating the weld stress according to the weld load, the weld size empirical value and the component size.

[0056] Specifically, weld stress consists of a primary stress and a secondary stress. The primary stress is the membrane stress, while the secondary stress is the sum of the membrane stress and the bending stress. Membrane stress is a normal stress component uniformly distributed along the thickness of the structural cross-section and is generally affected by axial forces such as tension or compression. Bending stress is a normal stress component linearly distributed along the thickness of the cross-section and is generally affected by bending stresses generated by bending moments.

[0057] refer to Figure 4 More specifically, the load at the endpoint P of the second element away from the first element is extracted as (F X , F Y , F Z , M X , M Y , M Z ),)where F represents the force on the node in different directions, M represents the moment of the force on the node in different directions, 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 length of the weld, and Z is parallel to the length of the weld.

[0058] Furthermore, in order to calculate the membrane stress of the weld, it is necessary to translate the end point P to obtain the load at the node O (F X , F Y , F Z , M X +eF Y , M Y -eF X , M Z ) Further, according to the load of node O, the first stress of node O is calculated, and the calculation formula is:

[0059]

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

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

[0062]

[0063] Furthermore, according to the load of node O, the second stress of node O is calculated, and the calculation formula is:

[0064]

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

[0066] Furthermore, according to 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 length of the weld Determine the second stress σ m+b The second stress σ m+b The calculation formula is:

[0067]

[0068] Step S105: Check the empirical value of the weld size according to the weld stress.

[0069] Specifically, after the weld stress is calculated, 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 the weld size is checked according to 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, determining that the empirical value of the weld size has passed the check; when the first stress is greater than the first preset stress, or the second stress is greater than the second preset stress, determining that the empirical value of the weld size has not passed the check, wherein the first preset stress is less than the second preset stress.

[0071] Specifically, in the practical application of welded structures, in addition to the membrane stress generated by axial force, they are also subject to bending moments, which generate bending stress at the weld. Therefore, membrane stress and bending stress generally exist simultaneously. When membrane stress and bending stress act on the weld in combination, the weld is subjected to a complex stress state. Therefore, when analyzing weld stress, it is necessary to consider the changes in both membrane stress and bending stress simultaneously to avoid damage to the weld during actual use due to stress exceeding its load-bearing capacity.

[0072] 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. The calculation formulas for the first preset stress and the second preset stress are:

[0073] σ1=ES a

[0074] σ2=E1.5S a

[0075] Among them, σ1 is the first preset stress; σ2 is the second preset stress; E is the joint coefficient, and different shapes of welds have different joint coefficients; S a It is the allowable stress of the material at the design temperature. It should be noted that the joint coefficient of the fillet weld is 0.5, and the joint coefficient of the non-full-through groove fillet weld is 0.75.

[0076] Since the comparative stress of the first preset stress is the first stress, i.e., the stress of the effective cross-section of the weld, and the comparative stress of the second preset stress is the second stress, i.e., the sum of the stress of the effective cross-section of the weld and the bending stress, the first preset stress is smaller than the second preset stress.

[0077] Furthermore, the following expanded verification judgment formula 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 both meet the design requirements. It can be further determined that the empirical value of the weld size meets the design requirements and passes the verification.

[0080] When the first stress is greater than the first preset stress or the second stress is greater than the second preset stress, it means that either the membrane stress or the bending stress of the weld does not meet the design requirements. It can be further judged that the empirical value of the weld size at this time does not meet the design requirements and fails the verification.

[0081] As an optional embodiment, when it is determined that the weld size empirical value has not passed the verification, the method also includes: adjusting the weld size empirical value; recalculating the weld stress based on the adjusted weld size empirical value, weld load and component size, until it is determined that the adjusted weld size empirical value has passed the verification based on the recalculated weld stress.

[0082] Specifically, when the weld size empirical value fails to pass the verification, the weld size empirical value needs to be further adjusted, which can be done by adjusting one or more parameters of the weld size, including the weld leg size, weld height, weld length, weld groove and weld throat size, and further recalculating the weld stress based on the adjusted weld size empirical value, combined with the weld load and component size, until the recalculated weld stress is compared with the preset stress and meets the judgment criteria, and it is determined that the weld size empirical value at this time has passed the verification.

[0083] Optionally, the weld verification method provided by the present invention may be further described in detail in combination with the following embodiments.

[0084] Example 1:

[0085] The weld provided in this embodiment is a T-shaped fillet weld, comprising a first element and a second element, wherein 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 end point P of the second element to the node O is 2490 mm.

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

[0087] The finite element model of the T-type fillet weld is built according to the component size. After the weld load is determined based on the finite element model and the component load, the load at the end point P of the second component (F 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, the weld size experience value and the component size, where the normal stress perpendicular to the effective cross section of the weld is Shear stress in the effective cross section of the weld Shear stress parallel to the length of the weld The sum of the normal stress and bending stress in the effective section of the seam 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 length of the weld

[0089] Furthermore, the weld stress is compared with the preset stress to check whether the empirical value of the weld size meets the design requirements: Calculate the first stress and the first preset stress: 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. It can be seen that the second stress is less than the second preset stress. Therefore, the empirical value of the weld size has passed the verification and meets the actual requirements.

[0090] From the above description, it can be seen that the weld verification method provided by the present invention, by building a finite element model of the welding component, and obtaining the nodal force of the weld based on the finite element model, and calculating the corresponding weld stress of the weld based on the nodal force, further judges whether the weld stress meets the standard to verify whether the weld strength corresponding to the weld size meets the requirements, thereby realizing accurate verification of the weld and effectively ensuring the safety of the use of the welded structure.

[0091] Based on the same inventive concept, corresponding to the weld verification method of any of the above embodiments, the present application also provides a computer-readable storage medium, which stores computer instructions, and the computer instructions are used to enable a computer to execute the weld verification method of any of the above embodiments.

[0092] The above-mentioned non-transitory computer-readable storage medium can be any available medium or data storage device that can be accessed by a computer, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO)), optical storage (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor storage (such as ROMs, EPROMs, EEPROMs, non-volatile memories (NAND FLASH), solid-state drives (SSDs)), etc.

[0093] It should be noted that the logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the 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 (e.g., a computer-based system, a system including a processor, or other system that can retrieve and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transmit a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection portion having one or more wires (electronic device), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and portable compact disc read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or otherwise processing it in a suitable manner if necessary, and then storing it in a computer memory.

[0094] The computer instructions stored in the computer-readable storage medium of the above embodiment are used to enable a computer to execute the weld verification method of any embodiment in the above exemplary method section. The weld verification method builds a finite element model of the welding element, obtains the node force of the weld based on the finite element model, and calculates the corresponding weld stress of the weld based on the node force, and further determines whether the weld stress meets the standard to verify whether the weld meets the standard size, thereby achieving accurate verification of the weld and effectively ensuring the safety of the use of the welded structure.

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

[0096] Figure 5 FIG. 5 is a schematic diagram showing the structure of a more specific weld verification 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, the memory 520, the input / output interface 530, and the communication interface 540 are connected to each other within the device via the bus 550.

[0097] The processor 510 can be implemented using a general-purpose CPU (Central Processing Unit), a microprocessor, an 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 devices, dynamic storage devices, etc. The memory 520 can store an operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 520 and is called and executed by the processor 510.

[0099] The input / output interface 530 is used to connect an input / output module to implement information input and output. The input / output module can be configured as a component in the device (not shown in the figure) or can be externally connected to the device to provide corresponding functions. Input devices may include a keyboard, mouse, touch screen, microphone, various sensors, etc., and output devices may include a display, speaker, vibrator, indicator light, etc.

[0100] The communication interface 540 is used to connect to a communication module (not shown) to enable communication between the device and other devices. The communication module can communicate via a wired method (such as USB, network cable, etc.) or a wireless method (such as mobile network, WiFi, Bluetooth, etc.).

[0101] The bus 550 comprises a pathway for transmitting information between the various components of the device (eg, the processor 510 , the memory 520 , the input / output interface 530 , and the communication interface 540 ).

[0102] It should be noted that although the above device only shows the processor 510, the memory 520, the input / output interface 530, the communication interface 540, and the bus 550, in a specific implementation, the device may also include other components necessary for normal operation. In addition, it will be understood by those skilled in the art that the above device may only include the components necessary to implement the embodiments of this specification, and does not necessarily include all the components shown in the figure.

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

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

[0105] Based on the same concept, corresponding to the weld calibration method provided in any of the above embodiments, the present application also provides a weld calibration 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 obtain the component size, component load and weld size empirical value of the component to be welded; the construction module 620 is used to build a finite element model of the component to be welded according to the component size; the determination module 630 is used to determine the weld load according to the finite element model and the component load; the calculation module 640 is used to calculate the weld stress according to the weld load, the weld size empirical value and the component size; the verification module 650 is used to verify the weld size empirical value according to 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 a sum of the membrane stress and the bending stress.

[0109] In some embodiments of the present invention, the calculation module 640 is also used 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 length direction of the weld, the sum of the normal stress and the bending stress perpendicular to the effective cross-section of the weld, the sum of the shear stress and the bending stress parallel to the effective cross-section of the weld, and the sum of the shear stress and the 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; determine the 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 length direction of the weld; determine the second stress based on the sum of the normal stress and the bending stress perpendicular to the effective cross-section of the weld, the sum of the shear stress and the bending stress parallel to the effective cross-section of the weld, and the sum of the shear stress and the bending stress parallel to the length direction of the weld.

[0110] In some embodiments of the present invention, the verification module 650 is also used 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; 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 components to be welded at the design temperature and the weld joint coefficient.

[0112] In some embodiments of the present invention, the verification module 650 is also used to: adjust the weld size empirical value when it is determined that the weld size empirical value has not passed the verification; recalculate the weld stress through the adjusted weld size empirical value, weld load and component size until it is determined that the adjusted weld size empirical value has passed the verification based on the recalculated weld stress.

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

[0114] In some embodiments of the present invention, the elements to be welded include a first element and a second element, and the building module 620 is further used to: after the finite element model of the elements to be welded is built, connect the finite element model of the first element with the finite element model of the second element through binding contact to simulate the welding of the first element and the second element.

[0115] In some embodiments of the present invention, the weld size includes weld leg size, weld height, weld length, weld groove and weld throat size.

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

[0117] It should be noted that the specific implementation of the weld checking device 600 in the embodiment of the present invention can refer to the specific implementation of the weld checking method in the above embodiment, and will not be described again here to avoid redundancy.

[0118] In summary, the weld calibration device provided in the embodiment of the present invention builds a finite element model of the welding element, obtains the nodal force of the weld based on the finite element model, and calculates the corresponding weld stress of the weld 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, thereby achieving accurate calibration of the weld and effectively ensuring the safety of the use of the welded structure.

[0119] refer to Figure 7 , which is a schematic diagram of a weld calibration device provided in an embodiment of the present invention.

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

[0121] In addition, other components and functions of the weld checking equipment in the embodiment 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 using hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0123] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations 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 any one or more embodiments or examples.

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

[0125] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A weld seam verification method, characterized in that: The method comprises: Obtaining empirical values ​​of component size, component load, and weld size of components to be welded; Building a finite element model of the component to be welded according to the dimensions of the component; determining a weld load based on the finite element model and the component load; Calculating weld stress based on the weld load, the weld size empirical value, and the component size; The empirical value of the weld size is checked according to the weld stress.

2. The weld seam verification method according to claim 1, characterized in that: 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.

3. The weld seam verification method according to claim 2, characterized in that: Calculating weld stress according to the weld load, the weld size empirical value, and the component size includes: 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 length direction of the weld, the sum of the normal stress and the bending stress perpendicular to the effective cross-section of the weld, the sum of the shear stress and the bending stress parallel to the effective cross-section of the weld, and the sum of the shear stress and the 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 and the bending stress perpendicular to the effective cross-section of the weld, the sum of the shear stress and the bending stress parallel to the effective cross-section of the weld, and the sum of the shear stress and the bending stress parallel to the length direction of the weld.

4. The weld seam verification method according to claim 3, characterized in that: The weld size empirical value is checked according to the weld stress, including: When the first stress is less than or equal to a first preset stress, and the second stress is less than or equal to a second preset stress, determining that the weld size empirical value passes 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 weld size empirical value has failed verification, wherein the first preset stress is less than the second preset stress.

5. The weld seam checking method according to claim 4, characterized in that: 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.

6. The weld seam checking method according to claim 4, characterized in that: When it is determined that the weld size empirical value fails the verification, the method further includes: Adjusting the empirical value of the weld size; The weld stress is recalculated using the adjusted weld size empirical value, the weld load, and the component size until it is determined that the adjusted weld size empirical value passes verification based on the recalculated weld stress.

7. The weld seam checking method according to claim 1, characterized in that: Determining a weld load based on the finite element model and the component loads includes: Extracting nodal forces on the effective cross-section of the weld based on the finite element model and the element load; The integral of the nodal force over the effective cross-section of the weld is calculated to determine the weld load.

8. The weld seam verification method according to claim 1, characterized in that: The components to be welded include 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 through binding contact to simulate welding of the first component and the second component.

9. The weld seam checking method according to claim 1, characterized in that: The weld dimensions include weld leg dimensions, weld height, weld length, weld groove and weld throat dimensions.

10. The weld verification method according to claim 1, characterized in that: The type of the weld is a T-shaped fillet weld.

11. A computer-readable storage medium, characterized in that A weld seam calibration program is stored thereon, and when the weld seam calibration program is executed by a processor, the weld seam calibration method according to any one of claims 1 to 10 is implemented.

12. A weld seam checking system, characterized in that: The device comprises a memory and a processor, and when the processor executes the weld verification program stored in the memory, the weld verification method according to any one of claims 1 to 10 is implemented.

13. A weld seam checking device, characterized in that: The device comprises: An acquisition module, used to obtain element size, element load and weld size experience values ​​of the element to be welded; A building module, used for building a finite element model of the component to be welded according to the size of the component; a determination module, configured to determine a weld load based on the finite element model and the component load; a calculation module, configured to calculate the weld stress according to the weld load, the weld size empirical value, and the component size; A verification module is used to verify the empirical value of the weld size according to the weld stress.

14. A weld seam checking device, characterized in that: Including the weld checking device as described in claim 13.

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