Welding sequence planning method and device, electronic equipment and medium

Abstract

The invention discloses a welding sequence planning method and device, electronic equipment and a medium, and the method comprises the steps: extracting a typical structural unit of a welding component, and classifying joints in the typical structural unit according to joint types; respectively establishing corresponding models for joints of different joint types; welding deformation simulation is conducted on the basis of the joint models of the different joint types under the displacement-free boundary condition and the displacement boundary condition; and the type of joint with the minimum welding deformation under the condition of no displacement boundary is used as a priority joint, and the type of joint with the minimum welding deformation under the condition of displacement boundary is used as a secondary priority joint. According to the welding sequence planning method and device, the electronic equipment and the medium, the joint with the minimum welding deformation amount under the condition of no displacement boundary is selected as the priority joint, and the joint with the minimum welding deformation amount under the condition of displacement boundary is preferentially selected, so that the welding sequence is optimized.

Description

Technical Field

[0001] The present invention belongs to the field of welding technology, and in particular relates to a welding sequence planning method, device, electronic equipment and medium. Background Art

[0002] Welding is a common process for joining metal parts. Its local heating characteristics cause the material in the welding area to expand during heating and contract during cooling. This process inevitably leads to welding deformation of the workpiece in practical applications. Welding deformation not only affects the strength and integrity of the welded joint, but may also have a significant impact on the dimensional accuracy of the entire structural component and the subsequent assembly quality.

[0003] Especially in the manufacturing process of large structural parts, such as body frames, front-end modules and cockpits, welds are usually required in multiple locations. Since each weld may be deformed due to local heating, the deformation effects of multiple welds often overlap, resulting in a significant increase in the welding deformation of the overall structural part.

[0004] Therefore, it is necessary to provide a new solution to the above technical problems. Summary of the invention

[0005] The object of the present invention is to provide a welding sequence planning method, device, electronic equipment and medium, which can optimize the welding sequence and reduce welding deformation.

[0006] To achieve the above purpose, the technical solution provided by the present invention is as follows:

[0007] In the first aspect, the present invention provides a welding sequence planning method, which includes: extracting typical structural units of welded components, and classifying the welding joints in the typical structural units according to the joint types; establishing corresponding models for welding joints of different joint types; performing welding deformation simulation based on the welding joint models of each different joint type under no-displacement boundary conditions and displacement boundary conditions; taking a type of joint with the smallest welding deformation under the no-displacement boundary conditions as a priority welding joint, and a type of joint with the smallest welding deformation under the displacement boundary conditions as a second priority welding joint.

[0008] In one or more embodiments, extracting typical structural units of a welding component includes: extracting typical structural units of the welding component based on a three-dimensional data model of the welding component, wherein the typical structural units include a “T”-shaped structure and / or a “+”-shaped structure.

[0009] In one or more embodiments, the joint types include a transverse angle joint, a first vertical angle joint, a second vertical angle joint and a butt joint, the first vertical angle joint is a structurally asymmetric vertical angle joint, and the second vertical angle joint is a structurally symmetric vertical angle joint.

[0010] In one or more embodiments, corresponding models are established for welding joints of different joint types, including: establishing corresponding geometric models for welding joints of different joint types; and meshing the geometric models to form mesh models.

[0011] In one or more embodiments, meshing the geometric model includes: dividing the weld area in the geometric model into non-weld areas using a grid transition from dense to sparse.

[0012] In one or more embodiments, the non-displacement boundary condition is to use a three-point fixation method to limit the rigid displacement of the welding joint model in a certain plane; and / or the displacement boundary condition includes one or more of fixed node constraints, tooling fixture constraints, adhesive constraints or mechanical connection constraints.

[0013] In one or more embodiments, the method further includes: except for the priority welding joint and the second priority welding joint, welding other welding joints according to the joint arrangement order.

[0014] In the second aspect, the present invention provides a welding sequence planning device, which includes: an extraction module for extracting typical structural units of welded components and classifying the welding joints in the typical structural units according to the joint types; a modeling module for establishing corresponding model simulation modules for welding joints of different joint types, respectively, for performing welding deformation simulation based on welding joint models of different joint types under no-displacement boundary conditions and displacement boundary conditions; a planning module for taking a type of joint with the smallest welding deformation under the no-displacement boundary conditions as a priority welding joint, and a type of joint with the smallest welding deformation under the displacement boundary conditions as a second priority welding joint.

[0015] In a third aspect, the present invention provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the welding sequence planning method as described above when executing the program.

[0016] In a fourth aspect, the present invention provides a computer-readable medium, wherein the computer-readable medium carries computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the welding sequence planning method as described above.

[0017] Compared with the prior art, the welding sequence planning method, device, electronic equipment and medium provided by the present invention extract typical structural units of welded components, classify different joint types, establish a model framework, and provide a basis for the analysis of welding deformation. When simulating the welding deformation of the joint model, different boundary conditions are taken into account, and the deformation under the conditions of no-displacement boundary and displacement boundary is evaluated at the same time; by selecting the joint with the smallest welding deformation under the condition of no-displacement boundary as the priority welding joint, and the joint with the smallest welding deformation under the condition of displacement boundary is selected as the second priority, the welding sequence is optimized to solve the problem of insufficient welding deformation control in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A flowchart of a welding sequence planning method according to an embodiment of the present invention;

[0020] Figure 2 Schematic diagram of typical structural units and different joint types in Example 1 of the present invention;

[0021] Figure 3 A schematic diagram of the geometric model and meshing division in Example 1 of the present invention;

[0022] Figure 4 Schematic diagram of the constraints of the boundary conditions without displacement and with displacement in Example 1 of the present invention;

[0023] Figure 5 A comparison diagram of the total amount of welding deformation before and after welding sequence planning in Example 1 of the present invention;

[0024] Figure 6 A schematic diagram of a welding sequence planning device according to an embodiment of the present invention;

[0025] Figure 7 FIG. 4 is a schematic diagram of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0027] Traditional welding methods are often unable to effectively control welding deformation when facing large structural parts, resulting in reduced assembly accuracy. This problem is mainly reflected in the welding process of multiple welds. Due to the expansion and contraction of materials caused by local heating, welding deformation often accumulates and superimposes, ultimately affecting the overall performance and safety of the structure. Existing technologies lack the ability to systematically analyze and optimize welding sequences for different welding joints, making deformation prediction during welding unclear.

[0028] In view of the above problems, the present invention proposes a welding sequence planning method, which aims to optimize the welding sequence and reduce welding deformation through systematic analysis and simulation means.

[0029] The present invention extracts typical structural units of welded components, classifies different joint types, and establishes a model framework. This classification and modeling process provides a basis for the analysis of welding deformation, making subsequent simulation and optimization more targeted. When simulating welding deformation of the joint model, different boundary conditions are taken into account, and the deformation under both non-displacement boundary and displacement boundary conditions is evaluated at the same time.

[0030] By selecting the joint with the smallest welding deformation under the non-displacement boundary condition as the priority welding joint, and the joint with the smallest welding deformation under the displacement boundary condition as the second priority, the welding sequence is optimized to solve the problem of insufficient welding deformation control in the prior art.

[0031] Please refer to Figure 1 FIG. 1 is a flow chart of a welding sequence planning method according to an embodiment of the present invention. The welding sequence planning method specifically comprises the following steps:

[0032] S101: extract typical structural units of welded components, and classify welding joints in the typical structural units according to joint types.

[0033] In an exemplary embodiment, the method of extracting typical structural units of a welding component specifically includes: extracting typical structural units of the welding component based on a three-dimensional data model of the welding component, wherein the typical structural units include a "T"-shaped structure and / or a "+"-shaped structure.

[0034] The representative geometric structure of the component can be identified by analyzing the 3D data model of the welded component. This process can rely on computer-aided design technology combined with digital modeling software to extract typical structural units.

[0035] In the specific implementation, it is necessary to establish a three-dimensional data model of the welded component, which can be done by means such as laser scanning or computer modeling. Then, the typical structural units are annotated and extracted in the model. Common structural units include "T"-shaped structures and "+"-shaped structures. For example, in the body frame of an automobile, multiple "T"-shaped joints are used to connect different body parts to form an overall structural frame, while "+"-shaped structures may appear at the intersection of the body to support the connection of multiple parts. By extracting these typical structural units, representative welding joints can be obtained, so as to better carry out subsequent welding deformation analysis and welding sequence planning.

[0036] In an exemplary embodiment, the joint types include a transverse angle joint, a first vertical angle joint, a second vertical angle joint and a butt joint, the first vertical angle joint is a structurally asymmetric vertical angle joint, and the second vertical angle joint is a structurally symmetric vertical angle joint.

[0037] Angle joints are a common type of joint in welding and are usually used at the intersection of two flat materials. The main feature of angle joints is that two pieces of material intersect at a certain angle on the same plane and are connected by a weld. For example, in the manufacture of body frames, angle joints are often used to connect crossbeams and longitudinal beams to form a strong frame structure.

[0038] The first vertical angle joint and the second vertical angle joint are joint types that are connected in three-dimensional space. The first vertical angle joint is usually asymmetrical in structure, and the shape and size of the materials on both sides of the joint may be significantly different. This type of joint is common in some complex structural designs, such as at the connection between the bracket and the pillar, where two different parts are often connected together through the first vertical angle joint. Due to the asymmetry of the structure, stress concentration is prone to occur during welding, which may lead to welding deformation and reduced joint strength.

[0039] The second vertical angle joint is a type of joint with symmetrical structure. The two parts of this joint are symmetrical in geometry and size, making it easier to achieve uniform heat distribution during welding. For example, in building steel structures, the second vertical angle joint is often used to connect the structure between beams and columns. Due to its symmetry, the stress distribution during welding is more uniform, thereby improving the overall strength and stability of the welded joint.

[0040] Butt joints are another common type of welded joints, usually used to weld two pieces of material together directly at their edges. The design of a butt joint allows the workpieces to be precisely butted together on the same plane and with the two welded pieces relatively parallel.

[0041] S102: For welding joints of different joint types, corresponding models are established respectively.

[0042] Different types of welded joints have different thermal behaviors and deformation characteristics during the welding process, so their unique geometry and material properties need to be considered when modeling them. For example, horizontal angle joints are usually formed at the intersection of two planes, while vertical angle joints may connect multiple parts in the vertical direction. In this process, computer-aided design software combined with finite element analysis (FEA) tools can effectively establish three-dimensional models of various types of welded joints.

[0043] In an exemplary embodiment, corresponding models are established for welding joints of different joint types, specifically including: establishing corresponding geometric models for welding joints of different joint types; and meshing the geometric models to form mesh models.

[0044] For example, in the welding of automobile body frames, multiple joint types are usually used. It is necessary to establish separate geometric models for different joint types. Assuming that there are both horizontal angle joints and second vertical angle joints in a certain body structure, it is necessary to create independent geometric models for these two joints. This modeling method can ensure that the unique characteristics of each joint are fully reflected, which is convenient for subsequent analysis.

[0045] After the geometric model is established, it is necessary to mesh the geometric model to form a mesh model. The meshing process is to decompose the complex geometric shape into several small, simple mesh units for numerical analysis. The connection points of these small units are called nodes. The density and quality of the mesh directly affect the accuracy and computational efficiency of the welding simulation.

[0046] Specifically, the method of meshing the geometric model includes: dividing the weld area in the geometric model into non-weld areas by adopting a grid transition from dense to sparse.

[0047] The weld area is the most critical part of the welding process. In this area, the high temperature generated during welding and the subsequent cooling process will cause thermal deformation of the material and corresponding stress concentration. Therefore, the mesh in the weld area needs to be more densely divided to ensure accurate simulation of the heat input and material reaction during welding. For example, if the weld width is 5mm, the mesh size in this area should be set to 1mm or even smaller to ensure detailed capture of heat conduction and stress distribution.

[0048] The mesh division from the weld area to the non-weld area should be gradually transitioned from dense to sparse. The core of this strategy is that the weld area has a significant impact on the welding deformation, while the area far away from the weld has little change, so the density of the mesh can be appropriately reduced. Specifically, in the edge area of ​​the weld, a smaller mesh size, such as 2mm, can be used, and when gradually transitioning to the non-weld area, the mesh size can be increased to 5mm or larger. This method not only reduces the computational burden, but also ensures the effectiveness of the simulation.

[0049] During the implementation process, numerical simulation software such as ANSYS, Abaqus, Simufact.welding, etc. can be selected. These software provide mesh generation tools that can automatically generate meshes in the weld area according to the specified mesh size and distribution method. Through these tools, engineers can flexibly adjust the mesh density around the weld to ensure that the changes in heat input and stress distribution during the welding process can be fully captured.

[0050] S103: performing welding deformation simulation based on welding joint models of different joint types under non-displacement boundary conditions and displacement boundary conditions respectively.

[0051] It should be noted that the mesh model in step S102 can be imported into numerical simulation software, and welding heat source, temperature boundary conditions and displacement boundary conditions can be set to perform welding deformation simulation. The welding heat source can be one or more of arc welding, laser welding and laser-arc hybrid welding.

[0052] The no-displacement boundary condition takes into account the possible deformation and displacement of the material during the welding process. This boundary condition is usually applicable in dynamic welding environments, where the weld joint is subject to thermal stress during the welding process, causing the material to expand and contract. For example, in the welding of large structural parts, due to the complexity of the structure, the stress distribution and deformation in the weld area may affect the stability of the overall structure. Therefore, it is necessary to impose a no-displacement constraint on the joint model to more realistically reflect the dynamic behavior of the material during the welding process.

[0053] Displacement boundary conditions are used to simulate the constraints of fixed points. In this case, some parts of the weld joint model are set to be unable to move. This can simulate the situation in which the workpiece is constrained by a fixture or other fixture in actual welding. For example, when welding a body frame, some joints may be fixed to the workbench to prevent displacement caused by thermal expansion during welding.

[0054] In specific implementation, finite element analysis (FEA) software, such as ANSYS, Abaqus, Simufact.welding, etc., can be used to perform thermal-mechanical coupling analysis on the welding model. Input the mesh model of the welding joint and its material properties, including thermal conductivity, expansion coefficient, and yield strength, and then define the temperature and displacement boundary conditions.

[0055] In an exemplary embodiment, the non-displacement boundary condition is to limit the rigid displacement of the weld joint model in a certain plane by using a three-point fixation method. The displacement boundary condition includes one or more of a fixed node constraint, a fixture constraint, an adhesive constraint or a mechanical connection constraint.

[0056] The realization of the zero-displacement boundary condition can be achieved by using the three-point fixation method to limit the rigid displacement of the welded joint model on a certain plane. Specifically, the three-point fixation method is an effective constraint method, which is often used to maintain the stability of the welded structure during the welding process. This method forms a rigid constraint system by setting three fixed points on a certain plane of the welded joint model, and these points can be located at different positions of the joint. For example, when the welded joint is a "T"-shaped structure, three fixed points can be set at the intersection of the structure, which can effectively prevent the distortion and displacement of the area caused by heat input. In this way, it is possible to simulate how the material deforms under restricted conditions during the welding process, and then analyze the influence of different joint types on the overall structure during the welding process.

[0057] Displacement boundary conditions cover a variety of constraint forms, including one or more of fixed node constraints, fixture constraints, adhesive constraints, or mechanical connection constraints. Fixed node constraints can be applied to key nodes that are not expected to move during welding. For example, in the welding of large components, some important connection points may be fixed to ensure that they do not move due to temperature changes during welding.

[0058] Fixture constraints can be used to simulate the fixing methods in actual welding operations. Fixtures are used to firmly fix the workpiece on the workbench to prevent deformation caused by thermal expansion during the welding process. For example, in body frame welding, the fixture will be designed to surround the entire welding area to ensure that all parts of the structure can maintain a stable position during welding to avoid overall deformation caused by uneven heat input.

[0059] Adhesive constraints and mechanical connection constraints are more complex boundary conditions with displacement. In some welding applications, adhesives may be used to initially bond different weld joints. In this case, adhesive constraints can simulate the temporary fixation effect before the glue dries to ensure that the joints do not move relative to each other during the welding process. Mechanical connection constraints are used to simulate situations where two welded workpieces are connected mechanically, such as bolts or rivets. In this case, the weld joint model needs to consider the rigidity of the connection to reflect the behavior of the material in actual welding.

[0060] By setting reasonable boundary conditions with and without displacement, the thermal stress distribution and material displacement during welding can be reproduced more realistically. These simulation results not only help predict the deformation that may occur during welding, but also provide a basis for optimizing the welding sequence. For example, by comparing the deformation results under different boundary conditions, it is possible to identify which welded joints have the smallest deformation under a specific process, thereby formulating a more reasonable welding sequence and reducing errors in the subsequent assembly process.

[0061] S104: The type of joint with the smallest welding deformation under the non-displacement boundary condition is taken as a priority welding joint, and the type of joint with the smallest welding deformation under the displacement boundary condition is taken as a second priority welding joint.

[0062] The joints with the smallest welding deformation under the no-displacement boundary condition are selected as the priority welding joints. During the welding process, these joints have the smallest deformation under the influence of welding heat due to their geometric characteristics or relative positions, so they can be processed first in the welding sequence.

[0063] The type of joint with the smallest welding deformation under displacement boundary conditions is selected as the secondary priority welding joint. In the actual welding process, the displacement constraint of the joint may affect the deformation of the surrounding structure. For example, when the welding joint is fixed by a fixture, if a joint has a small deformation under this condition, it means that its overall stability is better when subject to certain constraints. Therefore, selecting these joints as secondary priority welding joints can further reduce the impact of welding deformation on the overall structure in the subsequent welding process.

[0064] In an exemplary embodiment, except for the priority welding joint and the second priority welding joint, other welding joints are welded according to the joint arrangement order. After the welding of the priority and second priority joints is completed, the remaining welding joints are welded according to the predetermined joint arrangement order. This order can be arranged according to the spatial relationship between the joints, the impact of the welding order on the subsequent structure, and the possible deformation degree.

[0065] In a specific implementation method, all welded joints can be classified and sorted first. For example, in the welding process of a car body, there may be multiple types of joints, such as transverse joints, longitudinal joints, and vertical angle joints. By analyzing the relative position of each joint and the stress and deformation that it may encounter during the welding process, a reasonable welding sequence can be formulated. After completing the priority and second priority joints, the next joints will be welded one by one according to their position in the overall structure (such as clockwise welding or counterclockwise welding). Welding in the order of joint arrangement can ensure the smoothness of the welding process, reduce pauses and switching of welding operations, and improve work efficiency.

[0066] The present invention will be further described below in conjunction with specific embodiments.

[0067] Example 1

[0068] According to the actual working conditions of the aluminum alloy side frame welding assembly, the geometric model of the typical "T"-shaped structural unit in the welding component is extracted and established. According to the different types of joints in this model, four geometric models are established: butt joint, horizontal angle joint, first vertical angle joint (vertical angle joint 1) and second vertical angle joint (vertical angle joint 2), such as Figure 2 shown.

[0069] The above four geometric models are meshed to form a mesh model, such as Figure 3 As shown. The grid size is divided by the transition method from dense to sparse from the weld area to the parent material area. The grid size is: the grid size of the weld area and the near weld area is 1mm L ×1mm W ×1mm H , the mesh size away from the weld area gradually transitions to 8mm L ×1mm W ×1mm H .

[0070] The mesh model was imported into the welding numerical simulation software. The double ellipsoid heat source was selected as the welding heat source for the arc welding process. The temperature boundary conditions were set to a starting temperature of 20 °C and a convection heat transfer coefficient of 20 W / (m 2 ×K), the heat transfer coefficient is W / (m 2 ×K) and the emissivity is 0.6.

[0071] Welding deformation simulation is performed based on the mesh model of welded joints of different joint types under non-displacement boundary conditions and displacement boundary conditions. The three-point fixation method is used for welding numerical simulation under non-displacement boundary conditions, and the same clamping method as in the workshop is used for welding numerical simulation under displacement boundary conditions, such as Figure 4 shown.

[0072] The simulation results of welding deformation are extracted, and the statistical results are shown in Tables 1 and 2. Comparing the maximum welding deformation in each model, under the condition of no displacement constraint, the maximum welding deformation of the horizontal angle joint is 1.1 mm, which is the welding joint with the smallest welding deformation under the condition of no displacement constraint, and can be welded first; under the condition of displacement constraint, the maximum welding deformation of the vertical angle joint 2 is 0.7 mm, which is the welding joint with the smallest welding deformation under the condition of displacement constraint, and can be welded second first.

[0073] Table 1 Statistics of welding deformation of four joints (no displacement boundary conditions)

[0074]

[0075] Table 2 Statistics of welding deformation of four joints (with displacement boundary conditions)

[0076]

[0077] The horizontal angle joint is taken as the most prioritized weld, the vertical angle joint 2 is taken as the second prioritized weld, and the remaining two welds are welded in the order of arrangement. Finally, the maximum total welding deformation of the welded structure is 3.65 mm. Figure 5 Compared with the welding sequence adopted by the workshop, which is first the vertical angle joint, then the horizontal angle joint and finally the butt joint (before welding sequence planning), the total welding deformation is reduced by 2.9 mm. Figure 5 shown.

[0078] Please refer to Figure 6 As shown, based on the same inventive concept as the aforementioned welding sequence planning method, the present invention provides a welding sequence planning method device 600, which includes an extraction module 601, a modeling module 602, a simulation module 603, and a planning module 604.

[0079] The extraction module 601 is used to extract typical structural units of welded components and classify the welded joints in the typical structural units according to the joint type. The modeling module 602 is used to establish corresponding models for welded joints of different joint types. The simulation module 603 is used to perform welding deformation simulation based on the welded joint models of different joint types under the boundary conditions of no displacement and displacement. The planning module 604 is used to take the type of joint with the smallest welding deformation under the boundary conditions of no displacement as the priority welding joint, and the type of joint with the smallest welding deformation under the boundary conditions of displacement as the second priority welding joint.

[0080] Please refer to Figure 7As shown, an embodiment of the present invention further provides an electronic device 700, which includes at least one processor 701, a memory 702 (such as a non-volatile memory), a memory 703, and a communication interface 704, and the at least one processor 701, the memory 702, the memory 703, and the communication interface 704 are connected together via a bus 705. At least one processor 701 is used to call at least one program instruction stored or encoded in the memory 702, so that the at least one processor 701 performs various operations and functions of the welding sequence planning method described in various embodiments of this specification.

[0081] In an embodiment of the present specification, the electronic device 700 may include, but is not limited to, a personal computer, a server computer, a workstation, a desktop computer, a laptop computer, a notebook computer, a mobile electronic device, a smart phone, a tablet computer, a cellular phone, a personal digital assistant (PDA), a handheld device, a messaging device, a wearable electronic device, a consumer electronic device, and the like.

[0082] An embodiment of the present invention further provides a computer-readable medium carrying computer-executable instructions. When the computer-executable instructions are executed by a processor, they can be used to implement various operations and functions of the welding sequence planning method described in various embodiments of this specification.

[0083] The computer-readable medium in the present invention can be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium can be, for example, but not limited to, a system, device or component of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples of computer-readable storage media can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present invention, a computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it.

[0084] In the present invention, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, device, or device. The program code contained on the computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, optical cable, RF, etc., or any suitable combination of the above.

[0085] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0086] The present invention is described with reference to flowcharts and / or block diagrams of methods, apparatuses, systems, and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as a combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the process in the flowchart. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0087] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0088] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A welding sequence planning method, characterized in that: include: Extracting typical structural units of welded components, and classifying the welded joints in the typical structural units according to joint types; For welding joints of different joint types, corresponding models are established respectively; Welding deformation simulation is performed based on welding joint models of different joint types under non-displacement boundary conditions and displacement boundary conditions; The joint with the smallest welding deformation under the non-displacement boundary condition is taken as the priority welding joint, and the joint with the smallest welding deformation under the displacement boundary condition is taken as the second priority welding joint.

2. The welding sequence planning method according to claim 1, characterized in that: Extract typical structural elements of welded components, including: Based on the three-dimensional data model of the welding component, typical structural units of the welding component are extracted, and the typical structural units include a "T"-shaped structure and / or a "+"-shaped structure.

3. The welding sequence planning method according to claim 1, characterized in that: The joint types include a horizontal angle joint, a first vertical angle joint, a second vertical angle joint and a butt joint. The first vertical angle joint is a vertical angle joint with an asymmetric structure, and the second vertical angle joint is a vertical angle joint with a symmetric structure.

4. The welding sequence planning method according to claim 1, characterized in that: For welding joints of different joint types, corresponding models are established, including: For welding joints of different joint types, corresponding geometric models are established respectively; The geometric model is meshed to form a mesh model.

5. The welding sequence planning method according to claim 4, characterized in that: Meshing the geometric model includes: The weld area in the geometric model is divided into non-weld areas by a grid transition from dense to sparse.

6. The welding sequence planning method according to claim 1, characterized in that: The non-displacement boundary condition is to limit the rigid displacement of the weld joint model in a certain plane by using a three-point fixing method; and / or The displacement boundary conditions include one or more of fixed node constraints, fixture constraints, adhesive constraints or mechanical connection constraints.

7. The welding sequence planning method according to claim 1, characterized in that: The method further comprises: Except for the priority welding joints and the second priority welding joints, other welding joints are welded according to the joint arrangement sequence.

8. A welding sequence planning device, characterized in that: include: An extraction module, used for extracting typical structural units of welded components and classifying welding joints in the typical structural units according to joint types; Modeling module, used to establish corresponding models for welding joints of different joint types; A simulation module is used to simulate welding deformation based on welding joint models of different joint types under non-displacement boundary conditions and displacement boundary conditions; The planning module is used to take a type of joint with the smallest welding deformation under the non-displacement boundary condition as a priority welding joint, and a type of joint with the smallest welding deformation under the displacement boundary condition as a second priority welding joint.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the welding sequence planning method according to any one of claims 1 to 7 is implemented.

10. A computer-readable medium, characterized in that The computer readable medium carries computer executable instructions, and when the computer executable instructions are executed by a processor, they are used to implement the welding sequence planning method according to any one of claims 1 to 7.

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