Method for detecting strength of brewing cup support of coffee machine and coffee machine

Abstract

The invention discloses a strength detection method for a brewing cup support of a coffee machine and the coffee machine, and the strength detection method comprises the steps: determining a plurality of supporting points for supporting the brewing cup support in the working process of the brewing cup support according to the structural parameters of the brewing cup support; establishing a target finite element simulation model according to the structure parameters and the material parameters of the brewing cup bracket; according to the stress condition data of the brewing cup bracket cavity and the supporting point, applying constraint and load to the target finite element simulation model, and determining stress data of the brewing cup bracket; and determining a strength detection result of the brewing cup bracket according to the stress data. The strength of the brewing cup support is detected by establishing the finite element simulation model of the brewing cup support, quantitative analysis of the brewing cup support is achieved, the stress condition of the brewing cup support in the actual use process can be evaluated in the design stage, and therefore the design efficiency can be improved, the design cost can be reduced, and the safety performance of a coffee machine can be improved.

Description

Technical Field

[0001] This application relates to the field of coffee machine technology, and in particular to a method for testing the strength of a coffee machine brewing cup holder and a coffee machine. Background Technology

[0002] Currently, in the coffee machine industry, the brewing pressure under extreme conditions can reach around 20 bar, which places high demands on the strength of the brewing cup holder. At present, there is a lack of effective analytical and testing methods for verifying the strength of the brewing cup holder during operation, making it impossible to accurately assess its stress performance and structural reliability during use, thus affecting design efficiency.

[0003] For example, CN211262986U discloses a strength testing device for plastic parts of a coffee machine, comprising a base, a support plate, a platform, a first vertical rod, a second vertical rod, a first sleeve, a second sleeve, a fixing block, a connecting block, a hook, plastic parts, a tensile gauge, a first bottom block, a second bottom block, a through-beam photoelectric sensor, a crossbar, a connecting block, a storage box, a first partition, a second partition, an alcohol bottle, an alcohol base, a cleaning tool, and a third sleeve. It is evident that this existing patent uses a testing device comprising multiple components to test the strength of a coffee machine, resulting in high testing costs and limitations, as it only targets the strength of plastic parts. Summary of the Invention

[0004] This application provides a method for testing the strength of a coffee machine brewing cup holder and a coffee machine. The method involves establishing a finite element simulation model of the brewing cup holder to test its strength, thereby accurately evaluating the strength of the brewing cup holder.

[0005] A first aspect provides a method for testing the strength of a coffee maker brewing cup holder, wherein the brewing cup holder has a cavity capable of containing coffee liquid, and the cavity withstands pressure during the coffee brewing process. The strength testing method includes: determining multiple support points that support the brewing cup holder during its operation based on the structural parameters of the brewing cup holder; establishing a target finite element simulation model based on the structural and material parameters of the brewing cup holder; determining the stress data of the cavity and the support points; applying constraints and loads to the target finite element simulation model based on the stress data to determine the stress data of the brewing cup holder; and determining the strength test result of the brewing cup holder based on the stress data.

[0006] In some embodiments, the step of applying constraints and loads to the target finite element simulation model based on the force data to determine the stress data of the brewing cup support includes: constraining the degrees of freedom of the support point in multiple different directions based on the force conditions of the support point during the operation of the brewing cup support; applying a target pressure to the bottom surface of the cavity based on the force conditions of the cavity's interior during the operation of the brewing cup support; and determining the stress data by performing static analysis on the target finite element simulation model using a multi-channel adaptive convergence algorithm.

[0007] By constraining the degrees of freedom of the support points in multiple different directions, a target pressure is applied to the bottom surface of the cavity, and a multi-channel adaptive convergence algorithm is used for static analysis to achieve more efficient and accurate determination of stress data.

[0008] In some embodiments, applying a target pressure to the bottom surface of the cavity based on the stress conditions experienced by the cavity's interior during the operation of the brewing cup holder includes: determining the magnitude, direction, and effective area of ​​the pressure on the bottom surface of the cavity based on the stress conditions experienced by the cavity's interior during the operation of the brewing cup holder; and applying the target pressure to the bottom surface of the cavity based on the magnitude, direction, and effective area of ​​the pressure. This allows for accurate simulation of the stress conditions experienced by the cavity.

[0009] In some embodiments, the material parameters include at least yield strength, and the stress data includes a stress contour plot. Determining the strength test result of the brewing cup holder based on the stress data includes: determining the maximum stress value on the target finite element simulation model based on the stress contour plot; determining a safety factor based on the maximum stress value and the yield strength; and determining the strength test result as qualified if the safety factor is greater than or equal to the target safety factor. This improves testing efficiency and accuracy.

[0010] In some embodiments, after determining the safety factor, the method further includes: if the safety factor is less than the target safety factor, determining that the strength test result is unqualified; determining the strength influencing factors at the location of the maximum stress value; and optimizing the brewing cup support based on the strength influencing factors.

[0011] This allows for accurate optimization of the brewing cup holder structure even when the strength test results are unsatisfactory, thus improving design efficiency.

[0012] In some embodiments, the strength influencing factors include three types, and the optimization of the brewing cup holder based on the strength influencing factors includes: determining three levels corresponding to each of the strength influencing factors; conducting orthogonal experiments on the target finite element simulation model based on each of the strength influencing factors and each of the levels; and optimizing the structural parameters of the brewing cup holder based on the orthogonal experiment results.

[0013] Because orthogonal experiments can reduce the number of full factorial trials, they improve optimization efficiency and accuracy.

[0014] In some embodiments, the material parameters further include material type, density, elastic modulus, and Poisson's ratio. This allows the target finite element model to more accurately simulate the material of the brewing cup holder.

[0015] In some embodiments, before applying constraints and loads to the target finite element simulation model based on the stress data, the method further includes: meshing the target finite element simulation model using tetrahedral elements to form multiple meshes on the target finite element simulation model, wherein the stress data is determined by the stress data corresponding to each mesh. This avoids stress analysis at all locations on the target finite element simulation model, improving the efficiency of determining stress data.

[0016] In some embodiments, the meshing of the target finite element simulation model using tetrahedral elements includes: determining critical and non-critical regions on the target finite element simulation model based on the stress data, wherein the stress on the critical region is greater than the stress on the non-critical region; meshing the critical region based on tetrahedral elements of a first size, and meshing the non-critical region based on tetrahedral elements of a second size, wherein the first size is smaller than the second size.

[0017] By identifying critical and non-critical regions on the target finite element simulation model and using meshes of different sizes for the critical and non-critical regions, we can improve both computational efficiency and simulation accuracy for the critical regions.

[0018] In a second aspect, a coffee machine is provided, including a brewing cup holder having a cavity capable of containing coffee liquid, the cavity being subjected to pressure during the coffee brewing process, and the brewing cup holder being subjected to strength testing using the strength testing method for coffee machine brewing cup holders as described in the first aspect.

[0019] By applying the above technical solutions, and based on the structural parameters of the brewing cup holder, multiple support points are determined to support the brewing cup holder during its operation. A target finite element simulation model is established based on the structural and material parameters of the brewing cup holder. The stress data of the cavity and support points are determined, and constraints and loads are applied to the target finite element simulation model based on this stress data to determine the stress data of the brewing cup holder. The strength test results of the brewing cup holder are then determined based on the stress data. In this way, by establishing a finite element simulation model of the brewing cup holder to conduct strength testing, a quantitative analysis of the brewing cup holder is achieved. This allows for the evaluation of the stress conditions of the brewing cup holder during actual use at the design stage, thereby improving design efficiency, reducing design costs, and enhancing the safety performance of the coffee machine. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 The flowchart of a method for testing the strength of a coffee machine brewing cup holder according to an embodiment of this application. Figure 1 ; Figure 2 This is a flowchart illustrating the determination of stress data in an embodiment of this application; Figure 3 This is a flowchart illustrating the determination of the strength test results in an embodiment of this application; Figure 4 The flowchart of a method for testing the strength of a coffee machine brewing cup holder according to an embodiment of this application. Figure 2 ; Figure 5 This is a schematic diagram of the coffee machine brewing system according to an embodiment of this application; Figure 6 This is an exploded view of the coffee machine brewing system according to an embodiment of this application; Figure 7 This is a schematic diagram of the stress points of the brewing cup support according to an embodiment of this application; Figure 8 This is a schematic diagram illustrating mesh generation of the target finite element simulation model according to an embodiment of this application; Figure 9 Simulated stress cloud of the brewing cup holder in this application embodiment Figure 1 ; Figure 10 This is a schematic diagram of the brewing cup holder corresponding to the optimal stress result in the orthogonal experiment of this application embodiment; Figure 11 Simulated stress cloud of the brewing cup holder in this application embodiment Figure 2 .

[0022] Figures 5-7 , Figure 10 In the middle, 1. Brewing head; 2. Left side plate; 3. Push rod; 4. Brewing cup holder; 5. Lower connecting plate; 6. Right side plate; 401. First support column; 402. Second support column; 403. Cavity. Detailed Implementation

[0023] Various embodiments and features of this application are described herein with reference to the accompanying drawings.

[0024] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this application will be apparent to those skilled in the art.

[0025] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0026] These and other features of this application will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0027] It should also be understood that although this application has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this application.

[0028] The above and other aspects, features and advantages of this application will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0029] Specific embodiments of this application are described thereafter with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this application, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure the application. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use this application in a variety of substantially any suitable detailed structures.

[0030] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to this application.

[0031] This application discloses a method for strength testing of a coffee machine brewing cup holder. Based on the structural parameters of the brewing cup holder, multiple support points are determined to support the holder during operation. A target finite element simulation model is established based on the structural and material parameters of the brewing cup holder. Constraints and loads are applied to the target finite element simulation model based on the stress data of the brewing cup holder cavity and support points to determine the stress data. The strength test result of the brewing cup holder is determined based on the stress data. By establishing a finite element simulation model of the brewing cup holder to perform strength testing, quantitative analysis of the brewing cup holder is achieved. This allows for the evaluation of the stress conditions of the brewing cup holder during actual use during the design phase, thereby improving design efficiency, reducing design costs, and enhancing the safety performance of the coffee machine.

[0032] like Figure 7 As shown, the brewing cup holder has a cavity 403 capable of holding coffee liquid. The cavity 403 withstands the pressure during the coffee brewing process, such as... Figure 1 As shown, the intensity testing method includes the following steps: Step S101: Based on the structural parameters of the brewing cup holder, determine multiple support points that support the brewing cup holder during its operation.

[0033] In this embodiment, the structural parameters of the brewing cup holder may include its size, shape, and connection method with other components in the coffee machine. When the coffee machine is operating, a water pump delivers high-pressure water to the cavity of the brewing cup holder, mixing the water with coffee grounds or granules within the cavity to complete the coffee brewing process. Therefore, during operation, the cavity of the brewing cup holder withstands the pressure of coffee brewing, requiring support to improve the stability and reliability of the brewing system. Based on the structural parameters of the brewing cup holder, multiple support points are determined to support the brewing cup holder during its operation.

[0034] For example, such as Figures 5-7 As shown, the coffee brewing system may include a brewing head 1, a left side plate 2, a push rod 3, a brewing cup holder 4, a lower connecting plate 5, and a right side plate 6. The brewing head 1 is positioned above the brewing cup holder 4, and its lower end mates with the cavity 403. One side of the brewing cup holder 4 is connected to the left side plate 2, and the other side is connected to the right side plate 6. A push rod 3, connected to the brewing cup holder 4, is located on the outer side of the left side plate 2. The push rod 3 can push the brewing cup holder 4 along a target path, causing it to move closer to or further away from the lower end of the brewing head 1. The lower end of the inner side of the left side plate 2 is connected to the lower end of the inner side of the right side plate 6 via the lower connecting plate 5.

[0035] The first support column 401 is located at the upper end of the brewing cup holder 4 and is connected to the push rod 3 (external power). When brewing coffee, the brewing cup holder 4 can withstand 20 bar pressure (high pressure water output from a 20 bar water pump) under extreme conditions. It provides the main support force for the brewing cup holder 4 at support point A to prevent the brewing cup holder 4 from moving downward. Since the upper part of the brewing cup holder 4 is only supported by support point A, it is a cantilever beam structure. When the brewing cup holder 4 is subjected to a downward pressure of 20 bar from the coffee liquid, it will tend to tilt to the right. At this time, support point C on the upper right side of the brewing cup holder 4 will contact the right side plate 6, which will prevent the brewing cup holder 4 from tilting to the right, thus providing support at support point C. At the same time, the second support column 402 is located at the lower end of the brewing cup holder 4 and is connected to the inner side of the right side plate 6. The second support column 402 of the brewing cup holder 4 will be hooked by the lower part of the right side plate 6, preventing the brewing cup holder 4 from tilting at support point D. While the brewing cup holder 4 is tilting, support point B on the lower left side of the brewing cup holder 4 will contact the left side plate 2, which will also provide support for the brewing cup holder 4, preventing it from tilting further. In summary, when brewing coffee, the brewing cup holder 4 can be mainly supported by four support points: support points A, B, C, and D.

[0036] Step S102: Establish a target finite element simulation model based on the structural and material parameters of the brewing cup holder.

[0037] In this embodiment, any software including Creo, Ansys, Abaqus, and Solidworks can be used to construct the target finite element simulation model. The material parameters of the brewing cup holder may include the material type and hardness of the brewing cup holder. Based on the structural and material parameters of the brewing cup holder, a target finite element simulation model is established using simulation software to simulate the brewing cup holder.

[0038] Step S103: Determine the stress data of the cavity and the support point, apply constraints and loads to the target finite element simulation model based on the stress data, and determine the stress data of the target finite element simulation model.

[0039] In this embodiment, during the operation of the brewing cup holder, the cavity is subjected to pressure, and each support point provides support force for the brewing cup holder. The force data can include the magnitude and direction of the force. Based on the force data, constraints and loads are applied to the target finite element simulation model, allowing the target finite element simulation model to simulate the force conditions of the brewing cup holder and determine the stress data of the brewing cup holder.

[0040] Step S104: Determine the strength test result of the brewing cup support based on the stress data.

[0041] In this embodiment, the strength test result of the brewing cup holder can be determined by whether the stress data is within the safe range or meets the target stress standard. For example, if the stress data is within the safe range, the strength test result is determined to be qualified; otherwise, the strength test result is determined to be unqualified. Alternatively, if the stress data meets the target stress standard, the strength test result is determined to be qualified; if the stress data is within the safe range but does not meet the target stress standard, the strength test result is also determined to be unqualified.

[0042] The strength testing method for a coffee machine brewing cup holder according to this application involves determining multiple support points that support the brewing cup holder during operation based on its structural parameters; establishing a target finite element simulation model based on the structural and material parameters of the brewing cup holder; determining the stress data of the cavity and support points; applying constraints and loads to the target finite element simulation model based on the stress data to determine the stress data of the brewing cup holder; and determining the strength test result of the brewing cup holder based on the stress data. By establishing a finite element simulation model of the brewing cup holder to perform strength testing, a quantitative analysis of the brewing cup holder can be achieved. This allows for the evaluation of the stress situation of the brewing cup holder during actual use during the design phase, thereby improving design efficiency, reducing design costs, and enhancing the safety performance of the coffee machine.

[0043] In some embodiments of this application, the step of applying constraints and loads to the target finite element simulation model based on the force data to determine the stress data of the brewing cup holder is as follows: Figure 2 As shown, it includes the following steps: Step S1031: Based on the force exerted on the support point during the operation of the brewing cup holder, constrain the degrees of freedom of the support point in multiple different directions.

[0044] In this embodiment, the force conditions of the support points during the operation of the brewing cup holder can include the direction and magnitude of the force on each support point. Based on these force conditions, constraints are applied to the degrees of freedom in multiple different directions to limit their motion properties and simulate the force support conditions under actual working conditions. These multiple different directions can, for example, include the x, y, and z directions.

[0045] Step S1032: Apply a target pressure to the bottom surface of the cavity according to the stress condition inside the cavity during the operation of the brewing cup support.

[0046] In this embodiment, the force situation inside the cavity during the operation of the brewing cup holder can include the magnitude and direction of the force. Based on the force situation, a target pressure is applied to the bottom surface of the cavity. The target pressure can be, for example, the maximum vertical downward pressure that the cavity experiences when brewing coffee. The target pressure can also be higher than the maximum pressure by a target ratio (102%) to improve the safety margin of the brewing cup holder.

[0047] Step S1033: Based on the static analysis of the target finite element simulation model using a multi-channel adaptive convergence algorithm, the stress data is determined.

[0048] In this embodiment, a static analysis workflow is established, and a multi-channel adaptive convergence algorithm is used to perform static analysis to determine the stress data of the brewing cup support, thereby improving the model convergence efficiency and the accuracy of the simulation results.

[0049] By constraining the degrees of freedom of the support points in multiple different directions, a target pressure is applied to the bottom surface of the cavity, and a multi-channel adaptive convergence algorithm is used for static analysis to achieve more efficient and accurate determination of stress data.

[0050] In some embodiments of this application, applying a target pressure to the bottom surface of the cavity based on the force exerted inside the cavity on the brewing cup support during operation includes: Based on the force conditions inside the cavity during the operation of the brewing cup support, determine the magnitude, direction, and area of ​​the pressure on the bottom surface of the cavity; The target pressure is applied to the bottom surface of the cavity based on the magnitude, direction, and area of ​​the pressure acting on the bottom surface of the cavity.

[0051] In this embodiment, based on the stress conditions inside the cavity during the operation of the brewing cup support, the magnitude, direction, and area of ​​the pressure on the bottom surface of the cavity are determined. By setting the magnitude, direction, and area of ​​the pressure on the bottom surface of the cavity on the target finite element simulation model, the load state is set, thereby accurately simulating the stress conditions of the cavity. For example, as... Figure 7 As shown, when brewing coffee, there is a vertically downward pressure of 20 bar inside the cavity 403, so a vertically downward pressure of 20 bar is applied to the bottom surface of the cavity 403.

[0052] In some embodiments of this application, the material parameters include at least yield strength, the stress data includes stress contour plots, and the strength test result of the brewing cup holder is determined based on the stress data, such as... Figure 3 As shown, it includes the following steps: Step S1041: Determine the maximum stress value on the target finite element simulation model based on the stress cloud diagram.

[0053] In this embodiment, the material parameters include at least yield strength, which is the yield limit of a material when it yields, i.e., the stress that resists slight plastic deformation. A stress cloud plot is a visualization of the results of finite element analysis or numerical simulation. It uses color mapping to represent the magnitude and distribution of stress at various points within an object, where light and dark colors or gradients correspond to stress intensities (such as tensile or compressive stress). Red typically indicates high-stress areas, and blue indicates low-stress areas. The maximum stress value on the target finite element simulation model can be determined based on the color distribution on the stress cloud plot. For example, such as... Figure 9 As shown, stress concentration occurs at the root of the first support column 401 of the brewing cup holder 4, with a maximum stress of 144 MPa at the root.

[0054] Step S1042: Determine the safety factor based on the maximum stress value and the yield strength.

[0055] In this embodiment, the safety factor can be determined by dividing the yield strength by the maximum stress value.

[0056] Step S1043: If the safety factor is greater than or equal to the target safety factor, the strength test result is determined to be qualified.

[0057] In this embodiment, it is determined whether the safety factor is greater than or equal to the target safety factor. If it is greater than or equal to the target safety factor, the strength test result is determined to be qualified, thereby improving the testing efficiency and accuracy. For example, the target safety factor can be 1.5. If the safety factor is greater than or equal to 1.5, the strength test result is determined to be qualified.

[0058] In some embodiments of this application, after determining the safety factor, such as Figure 4 As shown, it also includes the following steps: Step S105: If the safety factor is less than the target safety factor, the strength test result is determined to be unqualified.

[0059] In this embodiment, if the safety factor is less than the target safety factor, the strength test result is determined to be unqualified. For example, such as... Figure 9 As shown, if the maximum stress value is 144 MPa at the root of the first support column 401, and the brewing cup holder is made of ADC12 aluminum alloy with a yield strength of 150 MPa, the calculated safety factor is 1.04, which is less than the target safety factor of 1.5, and the strength test result is determined to be unqualified.

[0060] Step S106: Determine the strength influencing factors at the location of the maximum stress value.

[0061] In this embodiment, factors affecting strength may include, for example, component thickness, component shape, and the component's position on the brewing cup holder.

[0062] Step S107: Optimize the brewing cup support according to the strength influencing factors.

[0063] Adjusting the structural parameters of the brewing cup holder based on factors affecting strength improves its safety factor. This allows for accurate structural optimization of the brewing cup holder even if strength test results are unsatisfactory, thus improving design efficiency.

[0064] In some embodiments of this application, the strength influencing factors include three types, and the optimization of the brewing cup holder based on the strength influencing factors includes: Determine three levels corresponding to each of the intensity influencing factors; Orthogonal experiments were conducted on the target finite element simulation model based on each of the strength influencing factors and each of the levels described. The structural parameters of the brewing cup holder were optimized based on the results of orthogonal experiments.

[0065] In this embodiment, when the strength test results are unqualified, different parameter combinations can be designed through orthogonal experiments, and the strength performance of each scheme can be quickly calculated using simulation to ultimately obtain the optimal solution for balancing structure and strength. Three strength influencing factors can be identified, and three levels can be designed for each factor. Then, orthogonal experiments are conducted on the target finite element simulation model based on each strength influencing factor and level. The optimal structural parameters are determined based on the orthogonal experiment results, and these parameters are applied to the brewing cup holder, thus completing the optimization of the brewing cup holder.

[0066] Because orthogonal experiments can reduce the number of full factorial trials, they improve optimization efficiency and accuracy.

[0067] For example, such as Figure 9 As shown, the strength test result of the brewing cup support 4 is unqualified. The strength influencing factors may include: A. the diameter of the first support column 401; B. the position height of the first support column 401; C. the length of the first support column 401. Three levels are designed for each strength influencing factor, as shown in Table 1.

[0068] Table 1

[0069] The orthogonal experimental table can be shown in Table 2.

[0070] Table 2

[0071] The L9(34) orthogonal array is a standard tool for 3-factor, 3-level experimental design. It contains 9 trials, which can effectively reduce the number of full-factor trials (from 27 to 9), greatly reducing the number of trials and improving the efficiency of the experiment. The array ensures the uniform distribution of factor level combinations through balanced combination characteristics, thus guaranteeing the accuracy of the experiment.

[0072] According to the schemes listed in the orthogonal experimental table, the structure of the brewing cup holder 4 was modified sequentially, and finite element simulation was performed, with the simulation stress results recorded. In this embodiment, Experiment 9 in Table 2 is used as an example. The structure of the brewing cup holder 4 was optimized using the three data points A3=14.5mm, B3=36mm, and C2=20mm, as shown in the attached figure. Figure 10 As shown. A new target finite element simulation model was established, and static finite element simulation calculations were performed to obtain the stress cloud diagram of the brewing cup support 4. Figure 11 As shown, the maximum stress at the root of the first support column 401 of the brewing cup holder 4 is 73 MPa. This stress is less than the yield strength of ADC12 aluminum alloy (150 MPa) and has a safety factor of 2, which meets the strength requirements. Therefore, this structural scheme is feasible.

[0073] Finally, the experimental results are analyzed. To simplify the analysis process, the results of the nine sets of experiments can be directly compared, and the result with the lowest stress can be selected as the final structure of the brewing cup support 4. Alternatively, the orthogonal experimental design process can be followed to perform mean and range analysis on the experimental results, calculate the priority of each factor's influence, and finally select the optimal parameter combination as the optimal structure of the brewing cup support 4.

[0074] By combining finite element simulation and orthogonal experiments, a simulation-driven parameter optimization closed loop is formed, ultimately obtaining the optimal solution for structural and strength balance. This allows for the assessment of the stress on the brewing cup holder during actual use at the design stage, and the prediction of whether deformation or breakage will occur during operation. This provides effective guidance for structural design, significantly improving optimization efficiency, reducing costs and risks, and making the optimization results more accurate and reliable.

[0075] In some embodiments of this application, the material parameters further include material type, density, elastic modulus, and Poisson's ratio.

[0076] In this embodiment, the material type, density, elastic modulus, and Poisson's ratio can be input into the target finite element model to more accurately simulate the material of the brewing cup holder. For example, the material type is ADC12 aluminum alloy with a density of 2.7 g / cm³. 2 The elastic modulus is 70 GPa, the Poisson's ratio is 0.33, and the yield strength is 150 MPa.

[0077] In some embodiments of this application, before applying constraints and loads to the target finite element simulation model based on the stress data, the method further includes: The target finite element simulation model is meshed using tetrahedral elements to form multiple meshes on the target finite element simulation model, wherein the stress data is determined by the stress data corresponding to each mesh.

[0078] In this embodiment, by using tetrahedral elements to mesh the target finite element simulation model, and then determining the stress data through the stress data corresponding to each mesh, stress analysis is avoided at all locations on the target finite element simulation model, thus improving the efficiency of determining stress data.

[0079] In some embodiments of this application, the meshing of the target finite element simulation model using tetrahedral elements includes: Based on the stress data, the critical and non-critical regions on the target finite element simulation model are determined, wherein the stress on the critical region is greater than the stress on the non-critical region. The critical region is meshed based on tetrahedral elements of a first size, and the non-critical region is meshed based on tetrahedral elements of a second size, wherein the first size is smaller than the second size.

[0080] In this embodiment, critical and non-critical regions on the target finite element simulation model are determined based on stress data. The stress in the critical regions is greater than that in the non-critical regions. For example, such as... Figure 7 As shown, during the operation of the brewing cup support, support points A, B, C, and D experience greater stress. Therefore, the areas containing support points A, B, C, and D can be designated as critical areas, while the remaining areas are designated as non-critical areas. Subsequently, meshing is performed in the critical areas using tetrahedral elements of a first size, and in the non-critical areas using tetrahedral elements of a second size. Since the first size is smaller than the second size, the mesh density in the critical areas is higher than that in the non-critical areas. For example, the first size could be 1mm, and the second size could be 3mm. Figure 8 As shown in the figure, the refined mesh area is the key area, and its mesh density is relatively high.

[0081] By identifying critical and non-critical regions on the target finite element simulation model and using meshes of different sizes for the critical and non-critical regions, we can improve both computational efficiency and simulation accuracy for the critical regions.

[0082] This application also proposes a coffee machine including a brewing cup holder. The brewing cup holder has a cavity capable of containing coffee liquid. The cavity withstands the pressure during the coffee brewing process. The brewing cup holder is subjected to strength testing using the strength testing method for coffee machine brewing cup holders as described in the various embodiments of this application.

[0083] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state drive), etc.

[0084] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A method for testing the strength of a coffee machine brewing cup holder, characterized in that, The brewing cup holder has a cavity capable of holding coffee liquid, the cavity being subjected to pressure during the coffee brewing process, and the strength detection method includes: Based on the structural parameters of the brewing cup holder, multiple support points are determined to support the brewing cup holder during its operation. A target finite element simulation model is established based on the structural and material parameters of the brewing cup holder. Determine the stress data of the cavity and the support point, apply constraints and loads to the target finite element simulation model based on the stress data, and determine the stress data of the brewing cup support; The strength test results of the brewing cup holder are determined based on the stress data.

2. The method for testing the strength of the coffee machine brewing cup holder as described in claim 1, characterized in that, The step of applying constraints and loads to the target finite element simulation model based on the stress data to determine the stress data of the brewing cup holder includes: Based on the force exerted on the support point during the operation of the brewing cup holder, the degrees of freedom of the support point in multiple different directions are constrained. Based on the stress conditions inside the cavity during the operation of the brewing cup holder, a target pressure is applied to the bottom surface of the cavity; The stress data are determined by performing static analysis on the target finite element simulation model using a multi-channel adaptive convergence algorithm.

3. The method for testing the strength of the coffee machine brewing cup holder as described in claim 2, characterized in that, The step of applying a target pressure to the bottom surface of the cavity based on the stress conditions inside the cavity during the operation of the brewing cup support includes: Based on the force conditions inside the cavity during the operation of the brewing cup support, determine the magnitude, direction, and area of ​​the pressure on the bottom surface of the cavity; The target pressure is applied to the bottom surface of the cavity based on the magnitude, direction, and area of ​​the pressure acting on the bottom surface of the cavity.

4. The method for testing the strength of the coffee machine brewing cup holder as described in claim 1, characterized in that, The material parameters include at least yield strength, the stress data includes a stress contour plot, and determining the strength test result of the brewing cup holder based on the stress data includes: The maximum stress value on the target finite element simulation model is determined based on the stress cloud diagram. The safety factor is determined based on the maximum stress value and the yield strength. If the safety factor is greater than or equal to the target safety factor, the strength test result is deemed qualified.

5. The method for testing the strength of the coffee machine brewing cup holder as described in claim 4, characterized in that, Following the determination of the safety factor, the following is also included: If the safety factor is less than the target safety factor, the strength test result is determined to be unqualified. Determine the strength influencing factors at the location of the maximum stress value; The brewing cup holder was optimized based on the strength influencing factors.

6. The method for testing the strength of the coffee machine brewing cup holder as described in claim 5, characterized in that, The strength influencing factors include three types, and the optimization of the brewing cup support based on the strength influencing factors includes: Determine three levels corresponding to each of the intensity influencing factors; Orthogonal experiments were conducted on the target finite element simulation model based on each of the strength influencing factors and each of the levels described. The structural parameters of the brewing cup holder were optimized based on the results of orthogonal experiments.

7. The method for testing the strength of the coffee machine brewing cup holder as described in claim 4, characterized in that, The material parameters also include material type, density, elastic modulus, and Poisson's ratio.

8. The method for testing the strength of the coffee machine brewing cup holder as described in claim 1, characterized in that, Before applying constraints and loads to the target finite element simulation model based on the stress data, the method further includes: The target finite element simulation model is meshed using tetrahedral elements to form multiple meshes on the target finite element simulation model, wherein the stress data is determined by the stress data corresponding to each mesh.

9. The method for testing the strength of the coffee machine brewing cup holder as described in claim 8, characterized in that, The mesh generation of the target finite element simulation model using tetrahedral elements includes: Based on the stress data, the critical and non-critical regions on the target finite element simulation model are determined, wherein the stress on the critical region is greater than the stress on the non-critical region. The critical region is meshed based on tetrahedral elements of a first size, and the non-critical region is meshed based on tetrahedral elements of a second size, wherein the first size is smaller than the second size.

10. A coffee machine, characterized in that, The invention includes a brewing cup holder, which has a cavity capable of containing coffee liquid. The cavity withstands pressure during the coffee brewing process. The brewing cup holder is subjected to strength testing using the strength testing method for coffee machine brewing cup holders as described in any one of claims 1-9.

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