Design method of laser cutting machine beam and beam

Abstract

This application relates to the field of laser cutting machine crossbeam design technology, and discloses a design method and crossbeam for a laser cutting machine. The method includes: constructing an initial three-dimensional model of the crossbeam based on target design parameters, the target design parameters including at least dimensional parameters and structural component parameters; setting up simulation parameters for the crossbeam based on the initial three-dimensional model; performing simulation calculations on the initial three-dimensional model based on the simulation parameters to determine the mechanical transmission path of the crossbeam; and performing topology lightweight design on the initial three-dimensional model based on the mechanical transmission path to obtain the target three-dimensional model. This application can accurately position and design the lightweight area of ​​the crossbeam based on the mechanical transmission path obtained from simulation, achieving lightweight design of the crossbeam, saving manufacturing costs, and reducing mechanical performance loss; the lightweight design process also ensures the quality of the crossbeam, improves the dynamic performance of the laser cutting machine crossbeam, and enhances the cutting accuracy and efficiency of the laser cutting machine.

Description

Technical Field

[0001] This application relates to the field of laser cutting machine crossbeam design technology, and more specifically, to a design method and crossbeam for a laser cutting machine. Background Technology

[0002] The laser cutting machine's crossbeam is a key component connecting the laser head assembly and the machine bed. The crossbeam can reciprocate laterally on the machine bed. A guide rail is installed on the upper part of the crossbeam, and the machine head is connected to the guide rail. The machine head can reciprocate laterally along the guide rail with the crossbeam.

[0003] The cutting precision requirements of the crossbeam are high. The greater the mass of the crossbeam, the greater the inertial force generated, and the worse the dynamic performance of the crossbeam. Furthermore, the greater the mass of the crossbeam, the greater the longitudinal pressure on the bed, the greater the longitudinal deformation, and the lower the cutting precision. In other words, the mass of the crossbeam directly affects the dynamic performance and cutting precision of the laser tube cutting machine. Therefore, it is necessary to carry out lightweight design of the crossbeam to improve the cutting precision and dynamic performance of the laser cutting machine.

[0004] Furthermore, due to the weight of the laser head, the crossbeam will deform under its weight. If the crossbeam deformation is too large, it will affect the cutting accuracy of the laser cutting machine. To reduce crossbeam deformation and improve cutting accuracy, the crossbeam design has a certain degree of redundancy, which seriously affects the dynamic performance of the crossbeam and reduces cutting efficiency. If lightweight design is blindly pursued by reducing materials to achieve the goal of lightweighting the crossbeam, although the weight is reduced, the strength and stiffness of the structure will also decrease significantly. This seriously weakens the mechanical properties of the structure. The large loss of mechanical properties (such as stiffness loss) will cause the crossbeam to deform more, which will reduce the cutting accuracy. It is difficult to achieve the best balance between crossbeam mass, stiffness and strength.

[0005] There is currently no effective solution to the aforementioned technical problems. Summary of the Invention

[0006] This application provides a design method and a crossbeam for a laser cutting machine, which at least solves the technical problems in the related art of achieving a balance between the mass and mechanical properties of the crossbeam, and the inability of lightweight design to take into account the dynamic performance of the crossbeam, the cutting accuracy of the cutting machine, and the cutting efficiency of the cutting machine.

[0007] According to one aspect of the embodiments of this application, a method for designing a crossbeam of a laser cutting machine is provided, comprising:

[0008] An initial three-dimensional model of the beam is constructed based on the target design parameters of the beam, wherein the target design parameters include at least dimensional parameters and structural component parameters;

[0009] Based on the initial 3D model, beam simulation settings are performed to determine simulation parameters;

[0010] Based on the simulation parameters, the initial three-dimensional model is simulated and calculated to determine the mechanical transmission path of the beam;

[0011] Based on the described mechanical transmission path, a topology lightweight design is performed on the initial three-dimensional model to obtain the target three-dimensional model.

[0012] Optionally, constructing the initial three-dimensional model of the beam based on the target design parameters of the beam includes:

[0013] The thickness of the crossbeam plate and the arrangement of the internal reinforcing members of the crossbeam are determined based on the dimensional parameters of the crossbeam.

[0014] The modeling parameters of the target structural component of the crossbeam are determined based on the dimensional parameters and structural component parameters of the crossbeam. The target structural component includes the main structural component of the crossbeam, internal reinforcement, internal connector, drive motor mounting base, and auxiliary component mounting points.

[0015] Optionally, the step of setting up beam simulation based on the initial three-dimensional model and determining simulation parameters includes:

[0016] Determine the material properties and connection relationships of the beams in the initial three-dimensional model;

[0017] The initial three-dimensional model is subjected to load settings, wherein the loads include the weight of the beam itself, the weight of the laser head component, and the inertial impact force generated during the cutting process;

[0018] Set boundary conditions for the initial 3D model;

[0019] The initial 3D model is meshed using a size control method.

[0020] Optionally, the step of performing simulation calculations on the initial three-dimensional model based on the simulation parameters to determine the mechanical transmission path of the beam includes:

[0021] The design domain and non-design domain of the crossbeam are determined, wherein the design domain of the crossbeam is the design object for lightweight design of the crossbeam, and the design domain includes the main structural components and internal reinforcements of the crossbeam, and the non-design domain is the non-lightweight design object;

[0022] The lightweighting target and constraints of the crossbeam are determined, wherein the lightweighting target includes a mass target and the constraints include mechanical performance constraints.

[0023] Based on the lightweighting objective and the constraints, a topology lightweighting calculation is performed on the initial three-dimensional model to obtain a first simulation calculation result, wherein the first simulation calculation result includes at least one of the stress distribution, deformation distribution and natural frequency of the beam under the corresponding load condition.

[0024] The mechanical transmission path of the beam is determined based on the calculation results.

[0025] Optionally, the step of performing topology lightweight design on the initial three-dimensional model based on the mechanical transmission path to obtain the target three-dimensional model includes:

[0026] Determine the target force transmission path in the force transmission path, wherein the target force transmission path includes a critical force transmission path and / or a non-critical force transmission path.

[0027] The target design domain and its lightweight parameters are determined based on the target force transmission path, wherein the lightweight parameters include the thickness of the crossbeam plate, the shape of the internal reinforcement, and the thickness of the internal reinforcement.

[0028] The initial 3D model is adjusted based on the lightweight parameters of the target design domain to obtain the target 3D model.

[0029] Optionally, adjusting the initial 3D model based on the lightweight parameters of the target design domain to obtain the target 3D model includes:

[0030] A first lightweight adjustment is performed on the target beam portion not located on the critical path of force transmission, and / or on the target beam portion located on the non-critical path of force transmission, wherein the target beam portion located on the non-critical path of force transmission includes the beam end, and the first lightweight adjustment includes a thinning design.

[0031] A second lightweighting adjustment is performed on target reinforcements not located on the critical path of force transmission, and / or on target reinforcements located on the non-critical path of force transmission, wherein the second lightweighting adjustment includes at least one of thinning design, hollowing design, and removal processing.

[0032] Optionally, after obtaining the target 3D model, the method further includes performing a security verification simulation on the target 3D model, wherein the security verification simulation includes:

[0033] The target three-dimensional model is simulated to obtain a second simulation result, wherein the simulation conditions of the target three-dimensional model correspond to the simulation conditions of the initial three-dimensional model.

[0034] The second simulation calculation result is compared with the first simulation calculation result to obtain the comparison result;

[0035] Based on the comparison results, determine whether the target 3D model meets the safety requirements; if it does, determine that the lightweight design of the beam is complete; if it does not, iteratively optimize the lightweight design of the beam.

[0036] Optionally, determining whether the target 3D model meets the security requirements based on the comparison results includes:

[0037] Determine whether the first maximum deformation value of the target 3D model is lower than the second maximum deformation value of the initial 3D model;

[0038] If the first maximum deformation value of the target 3D model is higher than or equal to the second maximum deformation value of the initial 3D model, the lightweight design of the beam is considered complete; or

[0039] Determine whether the first maximum stress value of the target three-dimensional model is lower than the second maximum stress value of the initial three-dimensional model;

[0040] If the first maximum stress value of the target three-dimensional model is lower than the second maximum stress value of the initial three-dimensional model, the lightweight design of the beam is considered complete.

[0041] Optionally, the iterative optimization of the lightweight design of the crossbeam includes at least one of the following:

[0042] Adjust the target design domain and its lightweight parameters;

[0043] Adjust the simulation parameters of the initial 3D model;

[0044] Adjust the design domain, non-design domain, lightweighting target, and constraints of the beam.

[0045] According to another aspect of the embodiments of this application, a laser cutting machine crossbeam is also provided, which is designed using the above-described method.

[0046] The laser cutting machine crossbeam design method and crossbeam provided in this application embodiment construct an initial three-dimensional model of the crossbeam based on target design parameters, wherein the target design parameters include at least dimensional parameters and structural component parameters; perform crossbeam simulation settings based on the initial three-dimensional model to determine simulation parameters; perform simulation calculations on the initial three-dimensional model based on the simulation parameters to determine the mechanical transmission path of the crossbeam; and perform topological lightweight design on the initial three-dimensional model based on the mechanical transmission path to obtain a target three-dimensional model. This allows for precise positioning and design of the lightweight area of ​​the crossbeam based on the simulated mechanical transmission path, achieving lightweight design of the crossbeam, saving manufacturing costs, and reducing mechanical performance loss; simultaneously, the lightweight design process can also ensure the quality of the crossbeam, improve the dynamic performance of the laser cutting machine crossbeam, and improve the cutting accuracy and efficiency of the laser cutting machine. Attached Figure Description

[0047] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0048] Figure 1 This is a flowchart illustrating the design method of the crossbeam of a laser cutting machine according to an embodiment of this application;

[0049] Figure 2 This is a front view of a laser tube cutting machine provided according to an embodiment of this application;

[0050] Figure 3 This is a top view of a laser tube cutting machine provided according to an embodiment of this application;

[0051] Figure 4 This is a cross-sectional view (including internal reinforcing members) of a laser tube cutting machine provided according to an embodiment of this application.

[0052] Figure 5 This is a simplified force diagram of the crossbeam of a laser tube cutting machine provided according to an embodiment of this application;

[0053] Figure 6 This is a shear force diagram of the crossbeam of a laser tube cutting machine provided according to an embodiment of this application;

[0054] Figure 7 This is a bending moment diagram of the crossbeam of a laser tube cutting machine provided according to an embodiment of this application. Detailed Implementation

[0055] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0056] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0057] According to an embodiment of this application, a method embodiment for designing a laser cutting machine crossbeam is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0058] Figure 1 This is a flowchart illustrating the design method of the crossbeam of a laser cutting machine according to an embodiment of this application, as shown below. Figure 1 As shown, the method includes the following steps:

[0059] Step S101: Construct an initial three-dimensional model of the beam based on the target design parameters of the beam, wherein the target design parameters include at least dimensional parameters and structural component parameters.

[0060] In this embodiment, the design method of the crossbeam of a laser tube cutting machine is explained using the design of the crossbeam as an example. Figure 2 and Figure 3 As shown, the laser tube cutting machine crossbeam (referred to as crossbeam 1) can be simplified as a simply supported beam structure. The crossbeam 1 is installed between the two longitudinal beams of the bed 2. The machine head (laser head component) 3 is installed in the middle of the crossbeam 1. The drive mechanism 4 (e.g., drive motor) is installed on the crossbeam 1 and located on one or both sides of the machine head 3.

[0061] The dimensional parameters of beam 1 refer to its design dimensions, such as length, width, and height. The structural component parameters of beam 1 include the type of structural component (e.g., ...). Figure 3 The structural parameters, such as the shape of the top plate 11, bottom plate 12, internal reinforcing member 13, etc., and other structural components.

[0062] In this step, three-dimensional modeling can be performed based on the design dimensions of beam 1 and the specific target design parameters to construct the initial three-dimensional model of beam 1.

[0063] Step S102: Based on the initial three-dimensional model, perform beam simulation settings and determine simulation parameters.

[0064] After constructing the initial 3D model, establish the connection between the initial 3D model and the simulation platform. Then, based on the initial 3D model, perform beam simulation settings on the simulation platform to determine the simulation parameters corresponding to the initial 3D model of the beam. Simulation parameters may include beam material parameters such as beam density, or parameters such as beam load.

[0065] Step S103: Perform simulation calculations on the initial three-dimensional model based on the simulation parameters to determine the mechanical transmission path of the beam.

[0066] After determining the simulation parameters, the initial three-dimensional model can be simulated and designed using finite element analysis based on these parameters, thereby determining the mechanical transmission path of beam 1. The mechanical transmission path refers to the path by which external force is transmitted from the point of application (the object applying the force) through structural components to the supporting point or foundation point, etc., the object receiving the force. The mechanical transmission path can include critical paths and non-critical paths. The critical path is the shortest and most direct path between the point of application and the object during force transmission, while non-critical paths refer to other paths between the point of application and the object, or auxiliary force transmission paths, etc. In this embodiment, simulation calculations can determine both critical and non-critical paths.

[0067] Step S104: Based on the mechanical transmission path, perform topology lightweight design on the initial three-dimensional model to obtain the target three-dimensional model.

[0068] Among them, topology lightweight design refers to the weight reduction structure optimization of the material distribution of the initial three-dimensional model. The weight reduction structure optimization includes size optimization, shape optimization and component composition optimization.

[0069] After determining the mechanical transmission path of beam 1, the region in the initial three-dimensional model that can be designed for lightweighting can be located based on the mechanical transmission path. The structural components of beam 1 in the design region can be thinned or heavy structural components can be removed to achieve lightweight optimization of the initial three-dimensional model and obtain the target three-dimensional model.

[0070] The laser cutting machine crossbeam design method and crossbeam provided in this application embodiment construct an initial three-dimensional model of the crossbeam based on target design parameters, wherein the target design parameters include at least dimensional parameters and structural component parameters; perform crossbeam simulation settings based on the initial three-dimensional model to determine simulation parameters; perform simulation calculations on the initial three-dimensional model based on the simulation parameters to determine the mechanical transmission path of the crossbeam; and perform topological lightweight design on the initial three-dimensional model based on the mechanical transmission path to obtain a target three-dimensional model. This allows for precise positioning and design of the lightweight area of ​​the crossbeam based on the simulated mechanical transmission path, achieving lightweight design of the crossbeam, saving manufacturing costs, and reducing mechanical performance loss. Simultaneously, the lightweight design process can also ensure the quality of the crossbeam, improving the dynamic performance of the laser cutting machine crossbeam and enhancing the cutting accuracy and efficiency of the laser cutting machine. For example, it can ensure that the crossbeam in the vicinity of the critical path has a certain mass, guaranteeing the dynamic performance and cutting accuracy (e.g., minimal deformation) of the crossbeam in that area; and it can thin the crossbeam plate and other components along non-critical paths according to the mechanical transmission path, improving the cutting efficiency of the thinned area.

[0071] As an optional embodiment, in step S101, constructing the initial three-dimensional model of the beam based on the target design parameters of the beam includes:

[0072] S1011, Based on the dimensional parameters of the crossbeam, determine the thickness of the crossbeam plate and the arrangement of the internal reinforcing members of the crossbeam;

[0073] S1012, Based on the size parameters and structural component parameters of the crossbeam, determine the modeling parameters of the target structural component of the crossbeam, wherein the target structural component includes the main structural component of the crossbeam, internal reinforcing components, internal connecting components, drive motor mounting base, and auxiliary component mounting points.

[0074] In step S1011, the thickness of the crossbeam plate and the arrangement of the internal reinforcing members 13 can be determined based on the dimensional parameters of the crossbeam 1. The thickness of the crossbeam plate refers to the thickness of the main structural component of the crossbeam, such as... Figure 4 As shown, the main structural components of the crossbeam 1 include the top plate 11, bottom plate 12, front side plate, and rear side plate. The main structural components of the crossbeam 1 may also include a left side plate and / or a right side plate. The left side plate and / or right side plate can be set according to the target design parameters of the crossbeam 1 to achieve a lightweight design. For example, after determining the upper limit of the weight of the crossbeam 1, if the weight range of the top plate 11, bottom plate 12, front side plate, rear side plate, and internal reinforcing members of the crossbeam 1 is determined, then the left side plate and / or right side plate are not designed. Alternatively, to facilitate the connection between the crossbeam 1 and the bed 2, a left side plate and / or right side plate can be provided.

[0075] The internal reinforcing member 13 can be an internal reinforcing plate or a reinforcing rib. Compared with an integral reinforcing plate structure, a reinforcing rib is easier to make lightweight. Therefore, in this embodiment, such as Figure 4 As shown, the internal reinforcing member 13 is defined as a reinforcing rib, and the arrangement of the internal reinforcing rib can be a cross shape.

[0076] In step S1012, the target structural component refers to the structural parts on the crossbeam 1 that may affect the lightweight design. These include structural components of the crossbeam itself (such as the top plate, connecting plate, mounting points on the crossbeam 1, etc.) and auxiliary components installed on the crossbeam 1 (such as the drive motor mounting bracket). The modeling parameters of the target structural component include the arrangement of each target structural component and their interconnection relationships.

[0077] Internal connecting parts can be internal connecting plates or connecting pipes, etc. The drive motor mounting base is installed on the top plate 11 of the crossbeam 1 for mounting the drive motor. Therefore, the area around the drive motor mounting base on the crossbeam 1 requires greater rigidity, and the quality of this area needs to be guaranteed. The drive motor mounting base can be considered as the target structural component. The auxiliary component mounting points are the mounting locations on the crossbeam 1 for installing auxiliary components. These auxiliary components can be the machine head 3 or other auxiliary components (such as displacement monitoring devices).

[0078] In step S1012, the modeling parameters of the target structural component can be determined based on the size parameters of the crossbeam 1 and the structural component parameters of each structural component (such as the number of internal reinforcing ribs). These parameters include the spacing between adjacent internal reinforcing ribs, the setting of internal reinforcing ribs inside the crossbeam 1 corresponding to the drive motor mounting seat to strengthen the drive motor mounting seat, or the installation position of the internal reinforcing ribs avoiding the drive motor mounting seat to prevent stress concentration and installation interference.

[0079] After determining the thickness of the crossbeam plate, the arrangement of the internal reinforcements of the crossbeam, and the modeling parameters of the target structural component, parametric 3D modeling is performed based on these parameters to obtain an initial 3D model, which is then imported into the simulation platform. The initial 3D model can include not only the crossbeam 1, but also the bed 2 connected to the crossbeam 1, and other components of the laser cutting machine, as long as they contain the structural parameters of the crossbeam 1.

[0080] As an optional embodiment, in step S102, the step of setting up the beam simulation based on the initial three-dimensional model and determining the simulation parameters includes:

[0081] S1021, Determine the material properties and connection relationships of the beams in the initial three-dimensional model;

[0082] S1022, Load settings are applied to the initial three-dimensional model, wherein the loads include the weight of the beam itself, the weight of the laser head component, and the inertial impact force generated during the cutting process;

[0083] S1023, Set boundary conditions for the initial three-dimensional model;

[0084] S1024, The initial three-dimensional model is meshed using the size control method.

[0085] In this step, the beam simulation is set up based on the finite element method. The material properties of beam 1 can be material parameters such as density, Poisson's ratio, and elastic modulus. The connection relationships of beam 1 are the connection relationships between different connecting components, such as the welding relationship between plates (including full welds and partial welds), and the bolt connection relationship between auxiliary components and plates. The loads of the initial 3D model include the weight of the beam itself, the weight of the laser head component (head 3), and the inertial impact force generated during the cutting process. For the convenience of simulation, the weight of the beam itself can be set as a uniformly distributed load, the weight of the laser head component (head 3) can be set as a concentrated load (force concentrated distribution), and the inertial impact force generated during the cutting process can be set as a preset fixed load.

[0086] When setting boundary conditions for the initial 3D model, the bolt holes connecting the crossbeam 1 and the bed 2 can be set as fixed constraint boundaries for the crossbeam 1. To improve simulation accuracy, in this embodiment, a size control method is used to mesh the initial 3D model, ensuring the mesh quality meets engineering requirements and minimizing its impact on simulation accuracy. By determining the simulation parameters, correct subsequent simulation calculations can be ensured.

[0087] As an optional embodiment, in step S103, the step of performing simulation calculations on the initial three-dimensional model based on the simulation parameters to determine the mechanical transmission path of the beam includes:

[0088] S1031, determine the design domain and non-design domain of the crossbeam, wherein the design domain of the crossbeam is the design object for lightweight design of the crossbeam, and the design domain includes the main structural components and internal reinforcements of the crossbeam, and the non-design domain is the non-lightweight design object;

[0089] S1032, determine the lightweighting target and constraints of the crossbeam, wherein the lightweighting target includes a mass target and the constraints include mechanical performance constraints;

[0090] S1033, Based on the lightweighting objective and the constraints, perform topology lightweighting calculation on the initial three-dimensional model to obtain a first simulation calculation result, wherein the first simulation calculation result includes at least one of the stress distribution, deformation distribution and natural frequency of the beam under the corresponding load condition.

[0091] S1034, Determine the mechanical transmission path of the crossbeam based on the calculation results.

[0092] In step S1031, topology lightweighting settings are performed, determining the design domain and non-design domains. The design domain refers to the design object for lightweighting the crossbeam; that is, the area where lightweighting design can be performed. The design domain can include the main structural components of the crossbeam 1 (such as the crossbeam side plates) and internal reinforcements. The lightweighting parameters of the design domain can be the crossbeam plate thickness, the shape of the internal reinforcements, the thickness of the internal reinforcements, the thickness of the internal connecting reinforcements, etc. The non-design domain refers to non-lightweighting design objects that cannot be lightweighted, including the drive motor mounting base and the mounting points of auxiliary components, etc. In specific implementations, the design domain can also be the lightweighting object of other structural components such as external reinforcements. For example, the design domain can be the external reinforcement between the crossbeam 1 and the bed 2, and the lightweighting parameters can be the shape of the external reinforcement, such as L-shaped or triangular.

[0093] In step S1032, a weight reduction target of n% (e.g., 15%) can be set, with stiffness and strength meeting preset ranges as constraints. The weight reduction ratio of the crossbeam 1 of different cutting machine models varies, and the weight reduction target can be flexibly set as needed.

[0094] In step S1033, based on the determined lightweighting objective and the constraints, a topology lightweighting simulation calculation is performed on the initial three-dimensional model to obtain the first simulation calculation results of the stress distribution, deformation distribution, and natural frequency of the beam 1 under different load conditions (loaded state). The stress distribution can be represented by a stress contour map, and the deformation distribution can be represented by a deformation contour map.

[0095] The natural frequency of beam 1 is a key indicator for evaluating the dynamic characteristics of the beam structure (such as vibration resistance and stability), and mainly depends on the material properties, geometric dimensions, boundary constraints, and mass distribution of beam 1. In this embodiment, the first-order natural frequency is obtained during simulation calculations to avoid resonance.

[0096] Based on the obtained stress and deformation distribution, the mechanical transmission path of the crossbeam 1 of the laser cutting machine (laser tube cutting machine) is evaluated in S1034, and then the potential for lightweighting is evaluated.

[0097] like Figure 3As shown, the crossbeam is under the worst load condition if and only if the machine head 3 is located in the middle of the crossbeam. In this embodiment, the stress distribution and deformation distribution of the crossbeam under the worst load condition can be calculated.

[0098] Considering the weight of the crossbeam 1 itself and the weight of the head 3, the weight of the crossbeam 1 itself is defined as a uniformly distributed load, denoted by q1, and the weight of the head 3 is defined as a concentrated load, denoted by m1. The total length of the crossbeam 1 is l. Based on this, mechanical calculations are performed, and the simplified force diagram of the laser tube cutting machine's crossbeam is as follows: Figure 5 As shown. Support reaction force F A = F B :

[0099] ;

[0100] The shear force diagram (stress distribution) of the crossbeam of the laser tube cutting machine is as follows: Figure 6 As shown (maximum shear force is F) s The bending moment diagram (deformation distribution) of the crossbeam of the laser tube cutting machine is shown below. Figure 7 As shown (maximum bending moment M) s ).

[0101] As an optional embodiment, in step S104, the topology lightweight design of the initial three-dimensional model based on the mechanical transmission path to obtain the target three-dimensional model includes:

[0102] S1041, determine the target force transmission path in the force transmission path, wherein the target force transmission path includes a critical force transmission path and / or a non-critical force transmission path.

[0103] S1042, Determine the target design domain and its lightweight parameters based on the target force transmission path;

[0104] S1043, the initial three-dimensional model is adjusted based on the lightweight parameters of the target design domain to obtain the target three-dimensional model.

[0105] The mechanical transmission path of beam 1 is obtained through simulation calculation. It can be determined from the mechanical transmission path whether it is a critical path or a non-critical path. If it is a critical path, the mass of the target design domain around the critical path needs to be kept within a certain range to ensure the mechanical performance (stiffness and strength) and dynamic performance of beam 1. If it is a non-critical path, the target design domain around the non-critical path can be adjusted to reduce the mass of beam 1.

[0106] As an optional embodiment, in step S1043, adjusting the initial 3D model based on the lightweight parameters of the target design domain to obtain the target 3D model includes:

[0107] S201, a first lightweight adjustment is made to the target beam portion that is not located on the critical path of force transmission, and / or to the target beam portion located on the non-critical path of force transmission, wherein the target beam portion located on the non-critical path of force transmission includes the beam end, and the first lightweight adjustment includes a thinning design.

[0108] S202, a second lightweighting adjustment is performed on the target reinforcement not located on the critical path of force transmission, and / or on the target reinforcement located on the non-critical path of force transmission, wherein the second lightweighting adjustment includes at least one of thinning design, hollowing design, and deletion processing.

[0109] In step S201, when the target design domain is a target beam that is not located on the non-critical path of mechanical transmission, and / or is a target beam located on the non-critical path of mechanical transmission, the target beam can be thinned based on the calculated lightweight parameters (such as thinning thickness) of the target design domain to obtain the topology-lightweight optimized target three-dimensional model.

[0110] In step S202, when the target design domain is a target reinforcement not located on the critical path of force transmission and / or not located on the non-critical path of force transmission, the target reinforcement is determined to be a lightweight structural component. The design domain determined in step S1031 is the thickness and shape of the internal reinforcement; therefore, in this step, the target reinforcement is an internal reinforcement. During lightweight design, the target reinforcement can be thinned based on the determined lightweight parameters, its shape can be designed to be hollow, or redundant target reinforcement can be directly removed.

[0111] As can be seen from the above, in this embodiment, the corresponding lightweight adjustments can be made according to the type of the target design area to achieve precise lightweight design.

[0112] This application embodiment can quickly locate the mechanical transmission path of the laser cutting machine beam based on the finite element method and topological lightweighting, retain the material of the critical path, and accurately remove the redundant material of the non-critical path (including thinning, designing it as hollow, etc.). This not only reduces the weight of the beam structure, but also maintains the original stiffness and strength and other mechanical properties, and can even improve the mechanical properties, achieving the best balance between the beam's mass and mechanical properties, while also taking into account the dynamic performance, cutting efficiency and cutting accuracy of the laser cutting machine.

[0113] As an optional embodiment, after obtaining the target 3D model through step S104, the method further includes performing a security verification simulation on the target 3D model, wherein the security verification simulation includes:

[0114] S1051, Perform simulation calculations on the target three-dimensional model to obtain a second simulation calculation result. The second simulation calculation result includes at least one of the deformation distribution, stress distribution, and natural frequency of the target three-dimensional model under the corresponding load condition. The simulation condition of the target three-dimensional model corresponds to the simulation condition of the initial three-dimensional model.

[0115] S1052, compare the second simulation calculation result with the first simulation calculation result to obtain a comparison result;

[0116] S1053, based on the comparison results, determine whether the target three-dimensional model meets the safety requirements; if it does, determine that the lightweight design of the beam is complete; if it does not, iteratively optimize the lightweight design of the beam.

[0117] The target three-dimensional model is simulated to obtain a second simulation result. The second simulation result includes at least one of the deformation distribution, stress distribution and natural frequency of the target three-dimensional model under the corresponding load condition. The simulation condition of the target three-dimensional model corresponds to the simulation condition of the initial three-dimensional model.

[0118] After obtaining the target 3D model through step S104, the target 3D model can be simulated again based on the simulation conditions of the initial 3D model to obtain a second simulation calculation result. This result is used to verify the safety of the topology-lightweighted beam and determine whether it meets the safety requirements. If it does, the topology-lightweighting design is completed, achieving the optimization goal of reducing mass. If it does not, the structural topology optimization design is performed again, and iterative calculations are conducted until it is determined that the beam topology-lightweighted beam meets the safety requirements. Corresponding to the first simulation calculation result, the second simulation calculation result includes at least one of the deformation distribution, stress distribution, and natural frequency of the target 3D model under the corresponding load conditions.

[0119] As an optional embodiment, in step S1053, determining whether the target 3D model meets the security requirements based on the comparison result includes:

[0120] S301, determine whether the first maximum deformation value of the target three-dimensional model is lower than the second maximum deformation value of the initial three-dimensional model;

[0121] S302, if the first maximum deformation value of the target three-dimensional model is higher than or equal to the second maximum deformation value of the initial three-dimensional model, the lightweight design of the beam is determined to be complete; or

[0122] S303, determine whether the first maximum stress value of the target three-dimensional model is lower than the second maximum stress value of the initial three-dimensional model;

[0123] S304, if the first maximum stress value of the target three-dimensional model is lower than the second maximum stress value of the initial three-dimensional model, the lightweight design of the beam is determined to be complete.

[0124] The stiffness requirement for beam 1 is that the component should have sufficient resistance to deformation. In steps S301 and S302, the second maximum deformation value in the first simulation calculation result can be used as a judgment criterion (the maximum deformation value should not decrease after lightweighting). The first maximum deformation value in the second simulation calculation result is compared with the second maximum deformation value in the first simulation calculation result. If the first maximum deformation value in the second simulation calculation result is less than the second maximum deformation value in the second simulation calculation result, it is determined that the lightweight beam 1 does not have sufficient resistance to deformation, and lightweighting design needs to continue so that the first maximum deformation value of the target three-dimensional model at least reaches the second maximum deformation value of the initial three-dimensional model. If the first maximum deformation value in the second simulation calculation result is greater than or equal to the second maximum deformation value in the second simulation calculation result, it is determined that the lightweight beam 1 has sufficient resistance to deformation and meets the safety requirements.

[0125] In practice, safety verification can also be performed based on a preset shear strength verification formula, which is expressed as follows:

[0126] ;

[0127] Where σ is the bending stress, Ms is the maximum bending moment, y is the distance from the stress point to the neutral axis, Iz is the moment of inertia of the section about the neutral axis, and z is the section modulus.

[0128] The strength requirement for beam 1 is that the component should not fail under a specified load. In steps S303 and S304, the second maximum stress value in the first simulation calculation result can be used as a judgment criterion (the maximum stress value after lightweighting is lower than the allowable stress value of the material). The first maximum stress value in the second simulation calculation result is compared with the second maximum stress value in the first simulation calculation result. If the first maximum stress value in the second simulation calculation result is less than the second maximum stress value in the second simulation calculation result, it is determined that the stress of the target three-dimensional model is lower than the preset stress threshold (the second maximum stress is lower than the preset stress threshold), the component will not fail, and the safety requirement is met. If the first maximum stress value in the second simulation calculation result is greater than or equal to the second maximum stress value in the second simulation calculation result, it is determined that the stress of the target three-dimensional model may be higher than the preset stress threshold, the component may be damaged, and the safety requirement is not met. Lightweight design needs to continue to make the first maximum stress value of the target three-dimensional model less than the second maximum stress value in the second simulation calculation result.

[0129] The dynamic performance requirements for beam 1 include stability requirements, which stipulate that the component should have sufficient ability to maintain its original equilibrium shape. Similarly, in this embodiment, the fixed frequency of the initial three-dimensional model can be used as a safety judgment standard to verify the safety of the target three-dimensional model.

[0130] As an optional embodiment, in step S1053, the iterative optimization of the lightweight design of the crossbeam includes at least one of the following:

[0131] S401, Adjust the target design domain and its lightweight parameters;

[0132] S402, Adjust the simulation parameters of the initial three-dimensional model;

[0133] S403, adjust the design domain, non-design domain, lightweight target, and constraints of the beam.

[0134] In this process, step S401 corresponds to step S104, step S402 corresponds to step S103, and step S403 corresponds to step S102. When the lightweight design of the crossbeam 1 no longer meets the safety requirements, the process can return to step S104 to redetermine the target design domain and its lightweight parameters based on the target force transmission path. Then, the target design domain and its lightweight parameters can be adjusted. For example, only the lightweight parameters can be adjusted, or the target design domain and its lightweight parameters can be redetermined based on the target force transmission path. Alternatively, the process can return to step S102 to re-set the simulation and adjust the simulation parameters of the initial three-dimensional model to obtain a more accurate target force transmission path. Or, the process can return to step S103 to redetermine the design domain, non-design domain, lightweight target, and constraints of the crossbeam 1. The lightweight design of the crossbeam 1 can be optimized through iterative calculations until the optimized crossbeam 1 (target three-dimensional model) meets the safety requirements. This ensures that the mechanical and dynamic performance of the crossbeam 1 is maintained while achieving lightweighting, and improves cutting accuracy and efficiency.

[0135] Understandably, in this embodiment, step S401 is executed first, followed by step S402, and then step S403. Through iterative back-and-forth calculation, the lightweight design of the beam 1 is optimized. For example, if the safety verification simulation results show that the lightweight beam 1 is close to the safety requirements, then the lightweight design efficiency can be improved by simply fine-tuning the lightweight parameters of the target design domain in step S401. If the safety verification simulation results show that the lightweight beam 1 is far from the safety requirements (the lightweight design may seriously affect the safety of the beam 1), then the process returns to step S403, and the design domain, non-design domain, lightweight target, and constraints of the beam 1 are readjusted to redetermine the mechanical force transmission path. For example, the lightweight target can be adjusted from a 15% reduction in mass to a 10% reduction in mass, achieving lightweighting while ensuring the safety of the beam 1.

[0136] According to an embodiment of this application, a laser cutting machine crossbeam designed using the above-described laser cutting machine crossbeam design method is also provided.

[0137] The laser cutting machine crossbeam provided in this application corresponds to the laser cutting machine crossbeam design method of the above embodiments. Any option in the laser cutting machine crossbeam design method embodiments is also applicable to the laser cutting machine crossbeam embodiments, and will not be repeated here.

[0138] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of disclosure in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A design method for a crossbeam of a laser cutting machine, characterized in that, include: An initial three-dimensional model of the beam is constructed based on the target design parameters of the beam, wherein the target design parameters include at least dimensional parameters and structural component parameters; Based on the initial 3D model, beam simulation settings are performed to determine simulation parameters; Based on the simulation parameters, the initial three-dimensional model is simulated and calculated to determine the mechanical transmission path of the beam; Based on the described mechanical transmission path, a topology lightweight design is performed on the initial three-dimensional model to obtain the target three-dimensional model.

2. The method according to claim 1, characterized in that, The construction of the initial three-dimensional model of the beam based on the target design parameters of the beam includes: The thickness of the crossbeam plate and the arrangement of the internal reinforcing members of the crossbeam are determined based on the dimensional parameters of the crossbeam. The modeling parameters of the target structural component of the crossbeam are determined based on the dimensional parameters and structural component parameters of the crossbeam. The target structural component includes the main structural component of the crossbeam, internal reinforcement, internal connector, drive motor mounting base, and auxiliary component mounting points.

3. The method according to claim 2, characterized in that, The process of setting up beam simulation based on the initial 3D model and determining simulation parameters includes: Determine the material properties and connection relationships of the beams in the initial three-dimensional model; The initial three-dimensional model is subjected to load settings, wherein the loads include the weight of the beam itself, the weight of the laser head component, and the inertial impact force generated during the cutting process; Set boundary conditions for the initial 3D model; The initial 3D model is meshed using a size control method.

4. The method according to claim 3, characterized in that, The step of performing simulation calculations on the initial three-dimensional model based on the simulation parameters to determine the mechanical transmission path of the beam includes: The design domain and non-design domain of the crossbeam are determined, wherein the design domain of the crossbeam is the design object for lightweight design of the crossbeam, and the design domain includes the main structural components and internal reinforcements of the crossbeam, and the non-design domain is the non-lightweight design object; The lightweighting target and constraints of the crossbeam are determined, wherein the lightweighting target includes a mass target and the constraints include mechanical performance constraints. Based on the lightweighting objective and the constraints, a topology lightweighting calculation is performed on the initial three-dimensional model to obtain a first simulation calculation result, wherein the first simulation calculation result includes at least one of the stress distribution, deformation distribution and natural frequency of the beam under the corresponding load condition. The mechanical transmission path of the beam is determined based on the calculation results.

5. The method according to claim 4, characterized in that, The process of performing topology lightweighting design on the initial 3D model based on the mechanical transmission path to obtain the target 3D model includes: Determine the target force transmission path in the force transmission path, wherein the target force transmission path includes a critical force transmission path and / or a non-critical force transmission path. The target design domain and its lightweight parameters are determined based on the target force transmission path, wherein the lightweight parameters include the thickness of the crossbeam plate, the shape of the internal reinforcement, and the thickness of the internal reinforcement. The initial 3D model is adjusted based on the lightweight parameters of the target design domain to obtain the target 3D model.

6. The method according to claim 5, characterized in that, The adjustment of the initial 3D model based on the lightweight parameters of the target design domain to obtain the target 3D model includes: A first lightweight adjustment is performed on the target beam portion not located on the critical path of force transmission, and / or on the target beam portion located on the non-critical path of force transmission, wherein the target beam portion located on the non-critical path of force transmission includes the beam end, and the first lightweight adjustment includes a thinning design. A second lightweighting adjustment is performed on target reinforcements not located on the critical path of force transmission, and / or on target reinforcements located on the non-critical path of force transmission, wherein the second lightweighting adjustment includes at least one of thinning design, hollowing design, and removal processing.

7. The method according to claim 4, characterized in that, After obtaining the target 3D model, the method further includes performing a security verification simulation on the target 3D model, wherein the security verification simulation includes: The target three-dimensional model is simulated to obtain a second simulation result, wherein the simulation conditions of the target three-dimensional model correspond to the simulation conditions of the initial three-dimensional model. The second simulation calculation result is compared with the first simulation calculation result to obtain the comparison result; Based on the comparison results, determine whether the target 3D model meets the safety requirements; if it does, determine that the lightweight design of the beam is complete; if it does not, iteratively optimize the lightweight design of the beam.

8. The method according to claim 7, characterized in that, The step of determining whether the target 3D model meets the security requirements based on the comparison results includes: Determine whether the first maximum deformation value of the target 3D model is lower than the second maximum deformation value of the initial 3D model; If the first maximum deformation value of the target 3D model is higher than or equal to the second maximum deformation value of the initial 3D model, the lightweight design of the beam is considered complete; or Determine whether the first maximum stress value of the target three-dimensional model is lower than the second maximum stress value of the initial three-dimensional model; If the first maximum stress value of the target three-dimensional model is lower than the second maximum stress value of the initial three-dimensional model, the lightweight design of the beam is considered complete.

9. The method according to claim 7, characterized in that, The iterative optimization of the lightweight design of the crossbeam includes at least one of the following: Adjust the target design domain and its lightweight parameters; Adjust the simulation parameters of the initial 3D model; Adjust the design domain, non-design domain, lightweighting target, and constraints of the beam.

10. A crossbeam for a laser cutting machine, characterized in that, It is designed using the method described in any one of claims 1 to 9.

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